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Created December 22, 2025 21:55
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solution-draft-log-pr-1766440547211.txt
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# Solve.mjs Log - 2025-12-22T21:44:03.174Z
[2025-12-22T21:44:03.175Z] [INFO] 📁 Log file: /home/hive/solve-2025-12-22T21-44-03-174Z.log
[2025-12-22T21:44:03.180Z] [INFO] (All output will be logged here)
[2025-12-22T21:44:04.516Z] [INFO]
[2025-12-22T21:44:04.520Z] [INFO] 🚀 solve v0.38.1
[2025-12-22T21:44:04.520Z] [INFO] 🔧 Raw command executed:
[2025-12-22T21:44:04.523Z] [INFO] /home/hive/.nvm/versions/node/v20.19.6/bin/node /home/hive/.bun/bin/solve https://github.com/andchir/video-timeline/issues/126 --model opus --attach-logs --verbose --no-tool-check
[2025-12-22T21:44:04.524Z] [INFO]
[2025-12-22T21:44:04.555Z] [INFO]
[2025-12-22T21:44:04.559Z] [WARNING] ⚠️ SECURITY WARNING: --attach-logs is ENABLED
[2025-12-22T21:44:04.560Z] [INFO]
[2025-12-22T21:44:04.560Z] [INFO] This option will upload the complete solution draft log file to the Pull Request.
[2025-12-22T21:44:04.560Z] [INFO] The log may contain sensitive information such as:
[2025-12-22T21:44:04.561Z] [INFO] • API keys, tokens, or secrets
[2025-12-22T21:44:04.561Z] [INFO] • File paths and directory structures
[2025-12-22T21:44:04.561Z] [INFO] • Command outputs and error messages
[2025-12-22T21:44:04.561Z] [INFO] • Internal system information
[2025-12-22T21:44:04.562Z] [INFO]
[2025-12-22T21:44:04.564Z] [INFO] ⚠️ DO NOT use this option with public repositories or if the log
[2025-12-22T21:44:04.565Z] [INFO] might contain sensitive data that should not be shared publicly.
[2025-12-22T21:44:04.565Z] [INFO]
[2025-12-22T21:44:04.565Z] [INFO] Continuing in 5 seconds... (Press Ctrl+C to abort)
[2025-12-22T21:44:04.566Z] [INFO]
[2025-12-22T21:44:09.572Z] [INFO]
[2025-12-22T21:44:09.624Z] [INFO] 💾 Disk space check: 10677MB available (500MB required) ✅
[2025-12-22T21:44:09.629Z] [INFO] 🧠 Memory check: 7984MB available, swap: 2047MB (1102MB used), total: 8929MB (256MB required) ✅
[2025-12-22T21:44:09.632Z] [INFO] ⏩ Skipping tool connection validation (dry-run mode or skip-tool-connection-check enabled)
[2025-12-22T21:44:09.632Z] [INFO] ⏩ Skipping GitHub authentication check (dry-run mode or skip-tool-connection-check enabled)
[2025-12-22T21:44:09.633Z] [INFO] 📋 URL validation:
[2025-12-22T21:44:09.633Z] [INFO] Input URL: https://github.com/andchir/video-timeline/issues/126
[2025-12-22T21:44:09.633Z] [INFO] Is Issue URL: true
[2025-12-22T21:44:09.633Z] [INFO] Is PR URL: false
[2025-12-22T21:44:09.634Z] [INFO] 🔍 Checking repository access for auto-fork...
[2025-12-22T21:44:10.494Z] [INFO] Repository visibility: public
[2025-12-22T21:44:10.495Z] [INFO] ✅ Auto-fork: No write access detected, enabling fork mode
[2025-12-22T21:44:10.497Z] [INFO] ✅ Repository access check: Skipped (fork mode enabled)
[2025-12-22T21:44:10.870Z] [INFO] Repository visibility: public
[2025-12-22T21:44:10.870Z] [INFO] Auto-cleanup default: false (repository is public)
[2025-12-22T21:44:10.872Z] [INFO] 🔍 Auto-continue enabled: Checking for existing PRs for issue #126...
[2025-12-22T21:44:11.678Z] [INFO] 🔍 Fork mode: Checking for existing branches in konard/andchir-video-timeline...
[2025-12-22T21:44:12.757Z] [INFO] 📝 No existing PRs found for issue #126 - creating new PR
[2025-12-22T21:44:12.757Z] [INFO] 📝 Issue mode: Working with issue #126
[2025-12-22T21:44:12.759Z] [INFO]
Creating temporary directory: /tmp/gh-issue-solver-1766439852758
[2025-12-22T21:44:12.763Z] [INFO]
🍴 Fork mode: ENABLED
[2025-12-22T21:44:12.764Z] [INFO] Checking fork status...
[2025-12-22T21:44:13.161Z] [INFO] 🔍 Detecting fork conflicts...
[2025-12-22T21:44:14.361Z] [INFO] ✅ No fork conflict: Safe to proceed
[2025-12-22T21:44:14.790Z] [INFO] ✅ Fork exists: konard/andchir-video-timeline
[2025-12-22T21:44:14.796Z] [INFO]
📥 Cloning repository: konard/andchir-video-timeline
[2025-12-22T21:44:16.715Z] [INFO] ✅ Cloned to: /tmp/gh-issue-solver-1766439852758
[2025-12-22T21:44:16.747Z] [INFO] 🔗 Setting upstream: andchir/video-timeline
[2025-12-22T21:44:16.779Z] [INFO] ℹ️ Upstream exists: Using existing upstream remote
[2025-12-22T21:44:16.779Z] [INFO] 🔄 Fetching upstream...
[2025-12-22T21:44:17.124Z] [INFO] ✅ Upstream fetched: Successfully
[2025-12-22T21:44:17.127Z] [INFO] 🔄 Syncing default branch...
[2025-12-22T21:44:17.588Z] [INFO] ℹ️ Default branch: main
[2025-12-22T21:44:17.684Z] [INFO] ✅ Default branch synced: with upstream/main
[2025-12-22T21:44:17.688Z] [INFO] 🔄 Pushing to fork: main branch
[2025-12-22T21:44:18.669Z] [INFO] ✅ Fork updated: Default branch pushed to fork
[2025-12-22T21:44:18.870Z] [INFO]
📌 Default branch: main
[2025-12-22T21:44:18.909Z] [INFO]
🌿 Creating branch: issue-126-7ab473a9d29f from main
[2025-12-22T21:44:18.939Z] [INFO] 🔍 Verifying: Branch creation...
[2025-12-22T21:44:18.971Z] [INFO] ✅ Branch created: issue-126-7ab473a9d29f
[2025-12-22T21:44:18.972Z] [INFO] ✅ Current branch: issue-126-7ab473a9d29f
[2025-12-22T21:44:18.973Z] [INFO] Branch operation: Create new branch
[2025-12-22T21:44:18.973Z] [INFO] Branch verification: Matches expected
[2025-12-22T21:44:18.977Z] [INFO]
🚀 Auto PR creation: ENABLED
[2025-12-22T21:44:18.981Z] [INFO] Creating: Initial commit and draft PR...
[2025-12-22T21:44:18.981Z] [INFO]
[2025-12-22T21:44:18.981Z] [INFO] 📝 Creating: CLAUDE.md with task details
[2025-12-22T21:44:18.982Z] [INFO] Issue URL from argv['issue-url']: https://github.com/andchir/video-timeline/issues/126
[2025-12-22T21:44:18.982Z] [INFO] Issue URL from argv._[0]: undefined
[2025-12-22T21:44:18.982Z] [INFO] Final issue URL: https://github.com/andchir/video-timeline/issues/126
[2025-12-22T21:44:18.985Z] [INFO] CLAUDE.md already exists, appending task info...
[2025-12-22T21:44:18.986Z] [INFO] ✅ File created: CLAUDE.md
[2025-12-22T21:44:18.986Z] [INFO] 📦 Adding file: To git staging
[2025-12-22T21:44:19.042Z] [INFO] Git status after add: M CLAUDE.md
[2025-12-22T21:44:19.042Z] [INFO] 📝 Creating commit: With CLAUDE.md file
[2025-12-22T21:44:19.082Z] [INFO] ✅ Commit created: Successfully with CLAUDE.md
[2025-12-22T21:44:19.086Z] [INFO] Commit output: [issue-126-7ab473a9d29f 9b81401] Initial commit with task details
1 file changed, 13 insertions(+), 1 deletion(-)
[2025-12-22T21:44:19.111Z] [INFO] Commit hash: 9b81401...
[2025-12-22T21:44:19.142Z] [INFO] Latest commit: 9b81401 Initial commit with task details
[2025-12-22T21:44:19.171Z] [INFO] Git status: clean
[2025-12-22T21:44:19.192Z] [INFO] Remotes: origin https://github.com/konard/andchir-video-timeline.git (fetch)
[2025-12-22T21:44:19.217Z] [INFO] Branch info: * issue-126-7ab473a9d29f 9b81401 Initial commit with task details
main a33f2eb [origin/main] Merge pull request #128 from konard/issue-127-88eab27f8b69
[2025-12-22T21:44:19.218Z] [INFO] 📤 Pushing branch: To remote repository...
[2025-12-22T21:44:19.219Z] [INFO] Push command: git push -u origin issue-126-7ab473a9d29f
[2025-12-22T21:44:20.184Z] [INFO] Push exit code: 0
[2025-12-22T21:44:20.187Z] [INFO] Push output: remote:
remote: Create a pull request for 'issue-126-7ab473a9d29f' on GitHub by visiting:
remote: https://github.com/konard/andchir-video-timeline/pull/new/issue-126-7ab473a9d29f
remote:
To https://github.com/konard/andchir-video-timeline.git
* [new branch] issue-126-7ab473a9d29f -> issue-126-7ab473a9d29f
branch 'issue-126-7ab473a9d29f' set up to track 'origin/issue-126-7ab473a9d29f'.
[2025-12-22T21:44:20.188Z] [INFO] ✅ Branch pushed: Successfully to remote
[2025-12-22T21:44:20.189Z] [INFO] Push output: remote:
remote: Create a pull request for 'issue-126-7ab473a9d29f' on GitHub by visiting:
remote: https://github.com/konard/andchir-video-timeline/pull/new/issue-126-7ab473a9d29f
remote:
To https://github.com/konard/andchir-video-timeline.git
* [new branch] issue-126-7ab473a9d29f -> issue-126-7ab473a9d29f
branch 'issue-126-7ab473a9d29f' set up to track 'origin/issue-126-7ab473a9d29f'.
[2025-12-22T21:44:20.189Z] [INFO] Waiting for GitHub to sync...
[2025-12-22T21:44:22.762Z] [INFO] Compare API check: 1 commit(s) ahead of main
[2025-12-22T21:44:22.763Z] [INFO] GitHub compare API ready: 1 commit(s) found
[2025-12-22T21:44:23.159Z] [INFO] Branch verified on GitHub: issue-126-7ab473a9d29f
[2025-12-22T21:44:23.517Z] [INFO] Remote commit SHA: 9b81401...
[2025-12-22T21:44:23.521Z] [INFO] 📋 Getting issue: Title from GitHub...
[2025-12-22T21:44:23.942Z] [INFO] Issue title: "Реализовать историю изменений и откат действий"
[2025-12-22T21:44:23.945Z] [INFO] 👤 Getting user: Current GitHub account...
[2025-12-22T21:44:24.334Z] [INFO] Current user: konard
[2025-12-22T21:44:24.728Z] [INFO] User is not a collaborator (will skip assignment)
[2025-12-22T21:44:24.738Z] [INFO] User is not a collaborator (will skip assignment)
[2025-12-22T21:44:24.739Z] [INFO] 🔄 Fetching: Latest main branch...
[2025-12-22T21:44:25.143Z] [INFO] ✅ Base updated: Fetched latest main
[2025-12-22T21:44:25.144Z] [INFO] 🔍 Checking: Commits between branches...
[2025-12-22T21:44:25.174Z] [INFO] Commits ahead of origin/main: 1
[2025-12-22T21:44:25.175Z] [INFO] ✅ Commits found: 1 commit(s) ahead
[2025-12-22T21:44:25.175Z] [INFO] 🔀 Creating PR: Draft pull request...
[2025-12-22T21:44:25.176Z] [INFO] 🎯 Target branch: main (default)
[2025-12-22T21:44:25.176Z] [INFO] PR Title: [WIP] Реализовать историю изменений и откат действий
[2025-12-22T21:44:25.176Z] [INFO] Base branch: main
[2025-12-22T21:44:25.181Z] [INFO] Head branch: issue-126-7ab473a9d29f
[2025-12-22T21:44:25.183Z] [INFO] Assignee: konard
[2025-12-22T21:44:25.183Z] [INFO] PR Body:
## 🤖 AI-Powered Solution Draft
This pull request is being automatically generated to solve issue andchir/video-timeline#126.
### 📋 Issue Reference
Fixes andchir/video-timeline#126
### 🚧 Status
**Work in Progress** - The AI assistant is currently analyzing and implementing the solution draft.
### 📝 Implementation Details
_Details will be added as the solution draft is developed..._
---
*This PR was created automatically by the AI issue solver*
[2025-12-22T21:44:25.185Z] [INFO] Command: cd "/tmp/gh-issue-solver-1766439852758" && gh pr create --draft --title "$(cat '/tmp/pr-title-1766439865185.txt')" --body-file "/tmp/pr-body-1766439865184.md" --base main --head konard:issue-126-7ab473a9d29f --repo andchir/video-timeline
[2025-12-22T21:44:26.957Z] [INFO] 🔍 Verifying: PR creation...
[2025-12-22T21:44:27.399Z] [INFO] ✅ Verification: PR exists on GitHub
[2025-12-22T21:44:27.403Z] [INFO] ✅ PR created: #129
[2025-12-22T21:44:27.403Z] [INFO] 📍 PR URL: https://github.com/andchir/video-timeline/pull/129
[2025-12-22T21:44:27.404Z] [INFO] ℹ️ Note: Could not assign (no permission)
[2025-12-22T21:44:27.404Z] [INFO] 🔗 Linking: Issue #126 to PR #129...
[2025-12-22T21:44:27.799Z] [INFO] Issue node ID: I_kwDOQMVfss7f1PSU
[2025-12-22T21:44:28.265Z] [INFO] PR node ID: PR_kwDOQMVfss66OPxY
[2025-12-22T21:44:28.755Z] [INFO] ✅ Link verified: Issue #126 → PR #129
[2025-12-22T21:44:29.351Z] [INFO] 👤 Current user: konard
[2025-12-22T21:44:29.351Z] [INFO]
📊 Comment counting conditions:
[2025-12-22T21:44:29.352Z] [INFO] prNumber: 129
[2025-12-22T21:44:29.353Z] [INFO] branchName: issue-126-7ab473a9d29f
[2025-12-22T21:44:29.353Z] [INFO] isContinueMode: false
[2025-12-22T21:44:29.353Z] [INFO] Will count comments: true
[2025-12-22T21:44:29.355Z] [INFO] 💬 Counting comments: Checking for new comments since last commit...
[2025-12-22T21:44:29.356Z] [INFO] PR #129 on branch: issue-126-7ab473a9d29f
[2025-12-22T21:44:29.356Z] [INFO] Owner/Repo: andchir/video-timeline
[2025-12-22T21:44:29.822Z] [INFO] 📅 Last commit time (from API): 2025-12-22T21:44:19.000Z
[2025-12-22T21:44:30.984Z] [INFO] 💬 New PR comments: 0
[2025-12-22T21:44:30.985Z] [INFO] 💬 New issue comments: 0
[2025-12-22T21:44:30.989Z] [INFO] Total new comments: 0
[2025-12-22T21:44:30.989Z] [INFO] Comment lines to add: No (saving tokens)
[2025-12-22T21:44:30.989Z] [INFO] PR review comments fetched: 0
[2025-12-22T21:44:30.989Z] [INFO] PR conversation comments fetched: 0
[2025-12-22T21:44:30.990Z] [INFO] Total PR comments checked: 0
[2025-12-22T21:44:34.098Z] [INFO] Feedback info will be added to prompt:
[2025-12-22T21:44:34.100Z] [INFO] - Pull request description was edited after last commit
[2025-12-22T21:44:34.100Z] [INFO] 📅 Getting timestamps: From GitHub servers...
[2025-12-22T21:44:34.528Z] [INFO] 📝 Issue updated: 2025-12-22T21:28:45.000Z
[2025-12-22T21:44:34.870Z] [INFO] 💬 Comments: None found
[2025-12-22T21:44:35.344Z] [INFO] 🔀 Recent PR: 2025-12-22T21:44:26.000Z
[2025-12-22T21:44:35.348Z] [INFO]
✅ Reference time: 2025-12-22T21:44:26.000Z
[2025-12-22T21:44:35.348Z] [INFO]
🔍 Checking for uncommitted changes to include as feedback...
[2025-12-22T21:44:35.374Z] [INFO] ✅ No uncommitted changes found
[2025-12-22T21:44:35.819Z] [INFO] 📦 Fork workflows detected: https://github.com/konard/andchir-video-timeline/actions?query=branch%3Aissue-126-7ab473a9d29f
[2025-12-22T21:44:35.826Z] [INFO]
📝 Final prompt structure:
[2025-12-22T21:44:35.826Z] [INFO] Characters: 503
[2025-12-22T21:44:35.827Z] [INFO] System prompt characters: 8471
[2025-12-22T21:44:35.827Z] [INFO] Feedback info: Included
[2025-12-22T21:44:35.830Z] [INFO]
🤖 Executing Claude: OPUS
[2025-12-22T21:44:35.831Z] [INFO] Model: opus
[2025-12-22T21:44:35.832Z] [INFO] Working directory: /tmp/gh-issue-solver-1766439852758
[2025-12-22T21:44:35.832Z] [INFO] Branch: issue-126-7ab473a9d29f
[2025-12-22T21:44:35.832Z] [INFO] Prompt length: 503 chars
[2025-12-22T21:44:35.832Z] [INFO] System prompt length: 8471 chars
[2025-12-22T21:44:35.833Z] [INFO] Feedback info included: Yes (1 lines)
[2025-12-22T21:44:35.882Z] [INFO] 📈 System resources before execution:
[2025-12-22T21:44:35.882Z] [INFO] Memory: MemFree: 4838860 kB
[2025-12-22T21:44:35.882Z] [INFO] Load: 10.61 10.45 10.56 11/801 1046600
[2025-12-22T21:44:35.883Z] [INFO]
📝 Raw command:
[2025-12-22T21:44:35.884Z] [INFO] (cd "/tmp/gh-issue-solver-1766439852758" && claude --output-format stream-json --verbose --dangerously-skip-permissions --model claude-opus-4-5-20251101 -p "Issue to solve: https://github.com/andchir/video-timeline/issues/126
Your prepared branch: issue-126-7ab473a9d29f
Your prepared working directory: /tmp/gh-issue-solver-1766439852758
Your prepared Pull Request: https://github.com/andchir/video-timeline/pull/129
Your forked repository: konard/andchir-video-timeline
Original repository (upstream): andchir/video-timeline
GitHub Actions on your fork: https://github.com/konard/andchir-video-timeline/actions?query=branch%3Aissue-126-7ab473a9d29f
Proceed." --append-system-prompt "You are an AI issue solver. You prefer to find the root cause of each and every issue. When you talk, you prefer to speak with facts which you have double-checked yourself or cite sources that provide evidence, like quote actual code or give references to documents or pages found on the internet. You are polite and patient, and prefer to assume good intent, trying your best to be helpful. If you are unsure or have assumptions, you prefer to test them yourself or ask questions to clarify requirements.
General guidelines.
- When you execute commands, always save their logs to files for easier reading if the output becomes large.
- When running commands, do not set a timeout yourself — let them run as long as needed (default timeout - 2 minutes is more than enough), and once they finish, review the logs in the file.
- When running sudo commands (especially package installations like apt-get, yum, npm install, etc.), always run them in the background to avoid timeout issues and permission errors when the process needs to be killed. Use the run_in_background parameter or append & to the command.
- When CI is failing or user reports failures, consider adding a detailed investigation protocol to your todo list with these steps:
Step 1: List recent runs with timestamps using: gh run list --repo andchir/video-timeline --branch issue-126-7ab473a9d29f --limit 5 --json databaseId,conclusion,createdAt,headSha
Step 2: Verify runs are after the latest commit by checking timestamps and SHA
Step 3: For each non-passing run, download logs to preserve them: gh run view {run-id} --repo andchir/video-timeline --log > ci-logs/{workflow}-{run-id}.log
Step 4: Read each downloaded log file using Read tool to understand the actual failures
Step 5: Report findings with specific errors and line numbers from logs
This detailed investigation is especially helpful when user mentions CI failures, asks to investigate logs, you see non-passing status, or when finalizing a PR.
Note: If user says \"failing\" but tools show \"passing\", this might indicate stale data - consider downloading fresh logs and checking timestamps to resolve the discrepancy.
- When a code or log file has more than 1500 lines, read it in chunks of 1500 lines.
- When facing a complex problem, do as much tracing as possible and turn on all verbose modes.
- When you create debug, test, or example/experiment scripts for fixing, always keep them in an examples and/or experiments folders so you can reuse them later.
- When testing your assumptions, use the experiment scripts, and add it to experiments folder.
- When your experiments can show real world use case of the software, add it to examples folder.
- When you face something extremely hard, use divide and conquer — it always helps.
Initial research.
- When you start, make sure you create detailed plan for yourself and follow your todo list step by step, make sure that as many points from these guidelines are added to your todo list to keep track of everything that can help you solve the issue with highest possible quality.
- When user mentions CI failures or asks to investigate logs, consider adding these todos to track the investigation: (1) List recent CI runs with timestamps, (2) Download logs from failed runs to ci-logs/ directory, (3) Analyze error messages and identify root cause, (4) Implement fix, (5) Verify fix resolves the specific errors found in logs.
- When you read issue, read all details and comments thoroughly.
- When you see screenshots or images in issue descriptions, pull request descriptions, comments, or discussions, use WebFetch tool (or fetch tool) to download the image first, then use Read tool to view and analyze it.
- When you need issue details, use gh issue view https://github.com/andchir/video-timeline/issues/126.
- When you need related code, use gh search code --owner andchir [keywords].
- When you need repo context, read files in your working directory.
- When you study related work, study the most recent related pull requests.
- When issue is not defined enough, write a comment to ask clarifying questions.
- When accessing GitHub Gists (especially private ones), use gh gist view command instead of direct URL fetching to ensure proper authentication.
- When you are fixing a bug, please make sure you first find the actual root cause, do as many experiments as needed.
- When you are fixing a bug and code does not have enough tracing/logs, add them and make sure they stay in the code, but are switched off by default.
- When you need latest comments on pull request (sorted newest first), use appropriate GitHub API commands.
- When you need latest comments on issue (sorted newest first), use appropriate GitHub API commands.
Solution development and testing.
- When issue is solvable, implement code with tests.
- When coding, each atomic step that can be useful by itself should be commited to the pull request's branch, meaning if work will be interrupted by any reason parts of solution will still be kept intact and safe in pull request.
- When you test:
start from testing of small functions using separate scripts;
write unit tests with mocks for easy and quick start.
- When you test integrations, use existing framework.
- When you test solution draft, include automated checks in pr.
- When issue is unclear, write comment on issue asking questions.
- When you encounter any problems that you unable to solve yourself (any human feedback or help), write a comment to the pull request asking for help.
- When you need human help, use gh pr comment 129 --body \"your message\" to comment on existing PR.
Preparing pull request.
- When you code, follow contributing guidelines.
- When you commit, write clear message.
- When you need examples of style, use gh pr list --repo andchir/video-timeline --state merged --search [keywords].
- When you open pr, describe solution draft and include tests.
- When there is a package with version and GitHub Actions workflows for automatic release, update the version (or other necessary release trigger) in your pull request to prepare for next release.
- When you update existing pr 129, use gh pr edit to modify title and description.
- When you are about to commit or push code, ALWAYS run local CI checks first if they are available in contributing guidelines (like ruff check, mypy, eslint, etc.) to catch errors before pushing.
- When you finalize the pull request:
follow style from merged prs for code, title, and description,
make sure no uncommitted changes corresponding to the original requirements are left behind,
make sure the default branch is merged to the pull request's branch,
make sure all CI checks passing if they exist before you finish,
double-check that all changes in the pull request answer to original requirements of the issue,
make sure no new new bugs are introduced in pull request by carefully reading gh pr diff,
make sure no previously existing features were removed without an explicit request from users via the issue description, issue comments, and/or pull request comments.
- When you finish implementation, use gh pr ready 129.
Workflow and collaboration.
- When you check branch, verify with git branch --show-current.
- When you push, push only to branch issue-126-7ab473a9d29f.
- When you finish, create a pull request from branch issue-126-7ab473a9d29f. (Note: PR 129 already exists, update it instead)
- When you organize workflow, use pull requests instead of direct merges to default branch (main or master).
- When you manage commits, preserve commit history for later analysis.
- When you contribute, keep repository history forward-moving with regular commits, pushes, and reverts if needed.
- When you face conflict that you cannot resolve yourself, ask for help.
- When you collaborate, respect branch protections by working only on issue-126-7ab473a9d29f.
- When you mention result, include pull request url or comment url.
- When you need to create pr, remember pr 129 already exists for this branch.
Self review.
- When you check your solution draft, run all tests locally.
- When you compare with repo style, use gh pr diff [number].
- When you finalize, confirm code, tests, and description are consistent." | jq -c .)
[2025-12-22T21:44:35.886Z] [INFO]
[2025-12-22T21:44:35.892Z] [INFO] 📋 User prompt:
[2025-12-22T21:44:35.892Z] [INFO] ---BEGIN USER PROMPT---
[2025-12-22T21:44:35.892Z] [INFO] Issue to solve: https://github.com/andchir/video-timeline/issues/126
Your prepared branch: issue-126-7ab473a9d29f
Your prepared working directory: /tmp/gh-issue-solver-1766439852758
Your prepared Pull Request: https://github.com/andchir/video-timeline/pull/129
Your forked repository: konard/andchir-video-timeline
Original repository (upstream): andchir/video-timeline
GitHub Actions on your fork: https://github.com/konard/andchir-video-timeline/actions?query=branch%3Aissue-126-7ab473a9d29f
Proceed.
[2025-12-22T21:44:35.895Z] [INFO] ---END USER PROMPT---
[2025-12-22T21:44:35.896Z] [INFO]
[2025-12-22T21:44:35.896Z] [INFO] 📋 System prompt:
[2025-12-22T21:44:35.896Z] [INFO] ---BEGIN SYSTEM PROMPT---
[2025-12-22T21:44:35.896Z] [INFO] You are an AI issue solver. You prefer to find the root cause of each and every issue. When you talk, you prefer to speak with facts which you have double-checked yourself or cite sources that provide evidence, like quote actual code or give references to documents or pages found on the internet. You are polite and patient, and prefer to assume good intent, trying your best to be helpful. If you are unsure or have assumptions, you prefer to test them yourself or ask questions to clarify requirements.
General guidelines.
- When you execute commands, always save their logs to files for easier reading if the output becomes large.
- When running commands, do not set a timeout yourself — let them run as long as needed (default timeout - 2 minutes is more than enough), and once they finish, review the logs in the file.
- When running sudo commands (especially package installations like apt-get, yum, npm install, etc.), always run them in the background to avoid timeout issues and permission errors when the process needs to be killed. Use the run_in_background parameter or append & to the command.
- When CI is failing or user reports failures, consider adding a detailed investigation protocol to your todo list with these steps:
Step 1: List recent runs with timestamps using: gh run list --repo andchir/video-timeline --branch issue-126-7ab473a9d29f --limit 5 --json databaseId,conclusion,createdAt,headSha
Step 2: Verify runs are after the latest commit by checking timestamps and SHA
Step 3: For each non-passing run, download logs to preserve them: gh run view {run-id} --repo andchir/video-timeline --log > ci-logs/{workflow}-{run-id}.log
Step 4: Read each downloaded log file using Read tool to understand the actual failures
Step 5: Report findings with specific errors and line numbers from logs
This detailed investigation is especially helpful when user mentions CI failures, asks to investigate logs, you see non-passing status, or when finalizing a PR.
Note: If user says "failing" but tools show "passing", this might indicate stale data - consider downloading fresh logs and checking timestamps to resolve the discrepancy.
- When a code or log file has more than 1500 lines, read it in chunks of 1500 lines.
- When facing a complex problem, do as much tracing as possible and turn on all verbose modes.
- When you create debug, test, or example/experiment scripts for fixing, always keep them in an examples and/or experiments folders so you can reuse them later.
- When testing your assumptions, use the experiment scripts, and add it to experiments folder.
- When your experiments can show real world use case of the software, add it to examples folder.
- When you face something extremely hard, use divide and conquer — it always helps.
Initial research.
- When you start, make sure you create detailed plan for yourself and follow your todo list step by step, make sure that as many points from these guidelines are added to your todo list to keep track of everything that can help you solve the issue with highest possible quality.
- When user mentions CI failures or asks to investigate logs, consider adding these todos to track the investigation: (1) List recent CI runs with timestamps, (2) Download logs from failed runs to ci-logs/ directory, (3) Analyze error messages and identify root cause, (4) Implement fix, (5) Verify fix resolves the specific errors found in logs.
- When you read issue, read all details and comments thoroughly.
- When you see screenshots or images in issue descriptions, pull request descriptions, comments, or discussions, use WebFetch tool (or fetch tool) to download the image first, then use Read tool to view and analyze it.
- When you need issue details, use gh issue view https://github.com/andchir/video-timeline/issues/126.
- When you need related code, use gh search code --owner andchir [keywords].
- When you need repo context, read files in your working directory.
- When you study related work, study the most recent related pull requests.
- When issue is not defined enough, write a comment to ask clarifying questions.
- When accessing GitHub Gists (especially private ones), use gh gist view command instead of direct URL fetching to ensure proper authentication.
- When you are fixing a bug, please make sure you first find the actual root cause, do as many experiments as needed.
- When you are fixing a bug and code does not have enough tracing/logs, add them and make sure they stay in the code, but are switched off by default.
- When you need latest comments on pull request (sorted newest first), use appropriate GitHub API commands.
- When you need latest comments on issue (sorted newest first), use appropriate GitHub API commands.
Solution development and testing.
- When issue is solvable, implement code with tests.
- When coding, each atomic step that can be useful by itself should be commited to the pull request's branch, meaning if work will be interrupted by any reason parts of solution will still be kept intact and safe in pull request.
- When you test:
start from testing of small functions using separate scripts;
write unit tests with mocks for easy and quick start.
- When you test integrations, use existing framework.
- When you test solution draft, include automated checks in pr.
- When issue is unclear, write comment on issue asking questions.
- When you encounter any problems that you unable to solve yourself (any human feedback or help), write a comment to the pull request asking for help.
- When you need human help, use gh pr comment 129 --body "your message" to comment on existing PR.
Preparing pull request.
- When you code, follow contributing guidelines.
- When you commit, write clear message.
- When you need examples of style, use gh pr list --repo andchir/video-timeline --state merged --search [keywords].
- When you open pr, describe solution draft and include tests.
- When there is a package with version and GitHub Actions workflows for automatic release, update the version (or other necessary release trigger) in your pull request to prepare for next release.
- When you update existing pr 129, use gh pr edit to modify title and description.
- When you are about to commit or push code, ALWAYS run local CI checks first if they are available in contributing guidelines (like ruff check, mypy, eslint, etc.) to catch errors before pushing.
- When you finalize the pull request:
follow style from merged prs for code, title, and description,
make sure no uncommitted changes corresponding to the original requirements are left behind,
make sure the default branch is merged to the pull request's branch,
make sure all CI checks passing if they exist before you finish,
double-check that all changes in the pull request answer to original requirements of the issue,
make sure no new new bugs are introduced in pull request by carefully reading gh pr diff,
make sure no previously existing features were removed without an explicit request from users via the issue description, issue comments, and/or pull request comments.
- When you finish implementation, use gh pr ready 129.
Workflow and collaboration.
- When you check branch, verify with git branch --show-current.
- When you push, push only to branch issue-126-7ab473a9d29f.
- When you finish, create a pull request from branch issue-126-7ab473a9d29f. (Note: PR 129 already exists, update it instead)
- When you organize workflow, use pull requests instead of direct merges to default branch (main or master).
- When you manage commits, preserve commit history for later analysis.
- When you contribute, keep repository history forward-moving with regular commits, pushes, and reverts if needed.
- When you face conflict that you cannot resolve yourself, ask for help.
- When you collaborate, respect branch protections by working only on issue-126-7ab473a9d29f.
- When you mention result, include pull request url or comment url.
- When you need to create pr, remember pr 129 already exists for this branch.
Self review.
- When you check your solution draft, run all tests locally.
- When you compare with repo style, use gh pr diff [number].
- When you finalize, confirm code, tests, and description are consistent.
[2025-12-22T21:44:35.897Z] [INFO] ---END SYSTEM PROMPT---
[2025-12-22T21:44:35.898Z] [INFO]
[2025-12-22T21:44:35.898Z] [INFO] 📋 Command details:
[2025-12-22T21:44:35.898Z] [INFO] 📂 Working directory: /tmp/gh-issue-solver-1766439852758
[2025-12-22T21:44:35.898Z] [INFO] 🌿 Branch: issue-126-7ab473a9d29f
[2025-12-22T21:44:35.899Z] [INFO] 🤖 Model: Claude OPUS
[2025-12-22T21:44:35.901Z] [INFO] 🍴 Fork: konard/andchir-video-timeline
[2025-12-22T21:44:35.902Z] [INFO]
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[2025-12-22T21:45:04.625Z] [INFO] {"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01QP49tnfoqYEBjFaLrDd5QQ","type":"tool_result","content":" 1→# VideoEditor Template\n 2→\n 3→A professional video timeline editor built with Angular 20.3, featuring drag-and-drop functionality, media management, and real-time preview capabilities.\n 4→\n 5→## Prerequisites\n 6→\n 7→Before you begin, ensure you have the following installed:\n 8→- **Node.js** (version 20.x or higher recommended)\n 9→- **npm** (comes with Node.js)\n 10→- **Angular CLI** (optional, as the project includes `ng` via npm scripts)\n 11→\n 12→## Installation\n 13→\n 14→1. Clone the repository:\n 15→```bash\n 16→git clone https://github.com/andchir/video-timeline.git\n 17→cd video-timeline/video-timeline\n 18→```\n 19→\n 20→2. Install dependencies:\n 21→```bash\n 22→npm install\n 23→```\n 24→\n 25→## Development Mode\n 26→\n 27→### Starting the Development Server\n 28→\n 29→To run the application in development mode with hot reload:\n 30→\n 31→```bash\n 32→npm start\n 33→```\n 34→\n 35→Or using the Angular CLI directly:\n 36→\n 37→```bash\n 38→ng serve\n 39→```\n 40→\n 41→The development server will start at `http://localhost:4200/`. The application automatically reloads when you modify source files.\n 42→\n 43→### Development Configuration\n 44→\n 45→The development build includes:\n 46→- Source maps for easier debugging\n 47→- No optimization for faster builds\n 48→- No license extraction\n 49→- Detailed error messages\n 50→\n 51→### Watch Mode\n 52→\n 53→To continuously build the project while developing (without running a server):\n 54→\n 55→```bash\n 56→npm run watch\n 57→```\n 58→\n 59→This runs `ng build --watch --configuration development` and rebuilds on file changes.\n 60→\n 61→## Running Tests\n 62→\n 63→### Unit Te
[2025-12-22T21:45:04.635Z] [INFO] sts\n 64→\n 65→Execute unit tests using the [Karma](https://karma-runner.github.io) test runner:\n 66→\n 67→```bash\n 68→npm test\n 69→```\n 70→\n 71→Or with Angular CLI:\n 72→\n 73→```bash\n 74→ng test\n 75→```\n 76→\n 77→This will:\n 78→- Launch the Karma test runner\n 79→- Open a browser window\n 80→- Run all `*.spec.ts` test files\n 81→- Watch for changes and re-run tests automatically\n 82→\n 83→### Test Configuration\n 84→\n 85→Tests are configured with:\n 86→- **Test Framework**: Jasmine 5.9\n 87→- **Test Runner**: Karma 6.4\n 88→- **Browsers**: Chrome (via karma-chrome-launcher)\n 89→- **Coverage**: Available via karma-coverage\n 90→\n 91→To run tests with coverage:\n 92→\n 93→```bash\n 94→ng test --code-coverage\n 95→```\n 96→\n 97→Coverage reports will be generated in the `coverage/` directory.\n 98→\n 99→## Production Build\n 100→\n 101→### Building for Production\n 102→\n 103→To create an optimized production build:\n 104→\n 105→```bash\n 106→npm run build\n 107→```\n 108→\n 109→Or with Angular CLI:\n 110→\n 111→```bash\n 112→ng build\n 113→```\n 114→\n 115→Or explicitly specify production configuration:\n 116→\n 117→```bash\n 118→ng build --configuration production\n 119→```\n 120→\n 121→### Production Build Output\n 122→\n 123→The production build will:\n 124→- Compile and bundle all source files\n 125→- Output to the `dist/` directory\n 126→- Apply optimizations (minification, tree-shaking)\n 127→- Add output hashing for cache busting\n 128→- Extract licenses\n 129→\n 130→### Build Budgets\n 131→\n 132→The production build enforces the following size budgets:\n 133→- **Initial bundle**: Warning at 500kB, error at 1MB\n 134→- **Component styles**: Warning at 4kB, error at 8kB\n 135→\n 136→### Serving Production Build Locally\n 137→\n 138→To test the production build locally, you can use a simple HTTP server:\n 139→\n 140→```bash\n 141→npx http-server dist/video-timeline/browser -p 8080\n 142→```\n 143→\n 144→Then open `http://localhost:8080` in your browser.\n 145→\n 146→## Code Scaffolding\n 147→\n 148→Generate new Angular components, services, and other schematics:\n 149→\n 150→```bash\n 151→# Generate a component\n 152→ng generate component component-name\n 153→\n 154→# Generate a service\n 155→ng generate service service-name\n 156→\n 157→# Generate a directive\n 158→ng generate directive directive-name\n 159→\n 160→# View all available schematics\n 161→ng generate --help\n 162→```\n 163→\n 164→## Project Structure\n 165→\n 166→```\n 167→video-timeline/\n 168→├── src/\n 169→│ ├── app/\n 170→│ │ ├── components/\n 171→│ │ │ └── timeline/ # Main timeline component\n 172→│ │ ├── models/ # TypeScript interfaces and types\n 173→│ │ ├── app.ts # Root component\n 174→│ │ ├── app.config.ts # Application configuration\n 175→│ │ └── app.routes.ts # Routing configuration\n 176→│ ├── styles.css # Global styles\n 177→│ ├── main.ts # Application entry point\n 178→│ └── index.html # HTML entry point\n 179→├── public/ # Static assets\n 180→├── angular.json # Angular CLI configuration\n 181→├── tsconfig.json # TypeScript configuration\n 182→└── package.json # Dependencies and scripts\n 183→```\n 184→\n 185→## Available npm Scripts\n 186→\n 187→| Script | Command | Description |\n 188→|--------|---------|-------------|\n 189→| `start` | `ng serve` | Start development server |\n 190→| `build` | `ng build` | Build for production |\n 191→| `watch` | `ng build --watch --configuration development` | Build and watch for changes |\n 192→| `test` | `ng test` | Run unit tests |\n 193→| `ng` | `ng` | Access Angular CLI commands directly |\n 194→\n 195→## Technologies Used\n 196→\n 197→- **Angular 20.3** - Modern web application framework\n 198→- **TypeScript 5.9** - Typed superset of JavaScript\n 199→- **Tailwind CSS 4.1** - Utility-first CSS framework\n 200→- **Bootstrap Icons 1.13** - Icon library\n 201→- **RxJS 7.8** - Reactive programming library\n 202→- **Jasmine & Karma** - Testing framework and runner\n 203→\n 204→## Code Quality\n 205→\n 206→### Prettier Configuration\n 207→\n 208→The project includes Prettier for code formatting:\n 209→- Print width: 100 characters\n 210→- Single quotes enabled\n 211→- Angular HTML parser for templates\n 212→\n 213→Format code using your IDE's Prettier integration or:\n 214→\n 215→```bash\n 216→npx prettier --write \"src/**/*.{ts,html,css}\"\n 217→```\n 218→\n 219→### TypeScript Configuration\n 220→\n 221→- Strict mode enabled for type safety\n 222→- Target: ES2022\n 223→- Module: ES2022\n 224→\n 225→## Browser Support\n 226→\n 227→The application is optimized for modern browsers supporting ES2022 features.\n 228→\n 229→## Contributing\n 230→\n 231→When contributing to this project:\n 232→1. Follow the existing code style and conventions\n 233→2. Write tests for new features\n 234→3. Ensure all tests pass before submitting\n 235→4. Update documentation as needed\n 236→\n 237→## Additional Resources\n 238→\n 239→- [Angular Documentation](https://angular.dev)\n 240→- [Angular CLI Command Reference](https://angular.dev/tools/cli)\n 241→- [TypeScript Documentation](https://www.typescriptlang.org/docs/)\n 242→- [Tailwind CSS Documentation](https://tailwindcss.com/docs)\n 243→\n 244→## License\n 245→\n 246→ISC\n 247→\n 248→---\n 249→\n 250→This project was generated using [Angular CLI](https://github.com/angular/angular-cli) version 20.3.8.\n 251→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"parent_tool_use_id":"toolu_01425HweE7Hcod1btvhp65G7","session_id":"c3de30fe-a5bd-49e6-8052-bb51f10fe87f","uuid":"a7f01100-b08a-48a0-ad42-f22fa7755eb2","tool_use_result":{"type":"text","file":{"filePath":"/tmp/gh-issue-solver-1766439852758/video-timeline/README.md","content":"# VideoEditor Template\n\nA professional video timeline editor built with Angular 20.3, featuring drag-and-drop functionality, media management, and real-time preview capabilities.\n\n## Prerequisites\n\nBefore you begin, ensure you have the following installed:\n- **Node.js** (version 20.x or higher recommended)\n- **npm** (comes with Node.js)\n- **Angular CLI** (optional, as the project includes `ng` via npm scripts)\n\n## Installation\n\n1. Clone the repository:\n```bash\ngit clone https://github.com/andchir/video-timeline.git\ncd video-timeline/video-timeline\n```\n\n2. Install dependencies:\n```bash\nnpm install\n```\n\n## Development Mode\n\n### Starting the Development Server\n\nTo run the application in development mode with hot reload:\n\n```bash\nnpm start\n```\n\nOr using the Angular CLI directly:\n\n```bash\nng serve\n```\n\nThe development server will start at `http://localhost:4200/`. The application automatically reloads when you modify source files.\n\n### Development Configuration\n\nThe development build includes:\n- Source maps for easier debugging\n- No optimization for faster builds\n- No license extraction\n- Detailed error messages\n\n### Watch Mode\n\nTo continuously build the project while developing (without running a server):\n\n```bash\nnpm run watch\n```\n\nThis runs `ng build --watch --configuration development` and rebuilds on file changes.\n\n## Running Tests\n\n### Unit Tests\n\nExecute unit tests using the [Karma](https://karma-runner.github.io) test runner:\n\n```bash\nnpm test\n```\n\nOr with Angular CLI:\n\n```bash\nng test\n```\n\nThis will:\n- Launch the Karma test runner\n- Open a browser window\n- Run all `*.spec.ts` test files\n- Watch for changes and re-run tests automatically\n\n### Test Configuration\n\nTests are configured with:\n- **Test Framework**: Jasmine 5.9\n- **Test Runner**: Karma 6.4\n- **Browsers**: Chrome (via karma-chrome-launcher)\n- **Coverage**: Available via karma-coverage\n\nTo run tests with coverage:\n\n```bash\nng test --code-coverage\n```\n\nCoverage reports will be generated in the `coverage/` directory.\n\n## Production Build\n\n### Building for Production\n\nTo create an optimized production build:\n\n```bash\nnpm run build\n```\n\nOr with Angular CLI:\n\n```bash\nng build\n```\n\nOr explicitly specify production configuration:\n\n```bash\nng build --configuration production\n```\n\n### Production Build Output\n\nThe production build will:\n- Compile and bundle all source files\n- Output to the `dist/` directory\n- Apply optimizations (minification, tree-shaking)\n- Add output hashing for cache busting\n- Extract licenses\n\n### Build Budgets\n\nThe production build enforces the following size budgets:\n- **Initial bundle**: Warning at 500kB, error at 1MB\n- **Component styles**: Warning at 4kB, error at 8kB\n\n### Serving Production Build Locally\n\nTo test the production build locally, you can use a simple HTTP server:\n\n```bash\nnpx http-server dist/video-timeline/browser -p 8080\n```\n\nThen open `http://localhost:8080` in your browser.\n\n## Code Scaffolding\n\nGenerate new Angular components, services, and other schematics:\n\n```bash\n# Generate a component\nng generate component component-name\n\n# Generate a service\nng generate service service-name\n\n# Generate a directive\nng generate directive directive-name\n\n# View all available schematics\nng generate --help\n```\n\n## Project Structure\n\n```\nvideo-timeline/\n├── src/\n│ ├── app/\n│ │ ├── components/\n│ │ │ └── timeline/ # Main timeline component\n│ │ ├── models/ # TypeScript interfaces and types\n│ │ ├── app.ts # Root component\n│ │ ├── app.config.ts # Application configuration\n│ │ └── app.routes.ts # Routing configuration\n│ ├── styles.css # Global styles\n│ ├── main.ts # Application entry point\n│ └── index.html # HTML entry point\n├── public/ # Static assets\n├── angular.json # Angular CLI configuration\n├── tsconfig.json # TypeScript configuration\n└── package.json # Dependencies and scripts\n```\n\n## Available npm Scripts\n\n| Script | Command | Description |\n|--------|---------|-------------|\n| `start` | `ng serve` | Start development server |\n| `build` | `ng build` | Build for production |\n| `watch` | `ng build --watch --configuration development` | Build and watch for changes |\n| `test` | `ng test` | Run unit tests |\n| `ng` | `ng` | Access Angular CLI commands directly |\n\n## Technologies Used\n\n- **Angular 20.3** - Modern web application framework\n- **TypeScript 5.9** - Typed superset of JavaScript\n- **Tailwind CSS 4.1** - Utility-first CSS framework\n- **Bootstrap Icons 1.13** - Icon library\n- **RxJS 7.8** - Reactive programming library\n- **Jasmine & Karma** - Testing framework and runner\n\n## Code Quality\n\n### Prettier Configuration\n\nThe project includes Prettier for code formatting:\n- Print width: 100 characters\n- Single quotes enabled\n- Angular HTML parser for templates\n\nFormat code using your IDE's Prettier integration or:\n\n```bash\nnpx prettier --write \"src/**/*.{ts,html,css}\"\n```\n\n### TypeScript Configuration\n\n- Strict mode enabled for type safety\n- Target: ES2022\n- Module: ES2022\n\n## Browser Support\n\nThe application is optimized for modern browsers supporting ES2022 features.\n\n## Contributing\n\nWhen contributing to this project:\n1. 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"tool_use_id": "toolu_0128VfQB6Dk7cC2gQtTNaDrp",
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"content": " 1→import { Component, signal } from '@angular/core';\n 2→import { TimelineComponent } from './components/timeline/timeline.component';\n 3→\n 4→@Component({\n 5→ selector: 'app-root',\n 6→ imports: [TimelineComponent],\n 7→ templateUrl: './app.html',\n 8→ styleUrl: './app.css'\n 9→})\n 10→export class App {\n 11→ protected readonly title = signal('video-timeline');\n 12→}\n 13→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"
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"filePath": "/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/app.ts",
"content": "import { Component, signal } from '@angular/core';\nimport { TimelineComponent } from './components/timeline/timeline.component';\n\n@Component({\n selector: 'app-root',\n imports: [TimelineComponent],\n templateUrl: './app.html',\n styleUrl: './app.css'\n})\nexport class App {\n protected readonly title = signal('video-timeline');\n}\n",
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[2025-12-22T21:45:15.331Z] [INFO] {"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01TSE79jxVz174dD3DGKXR5F","type":"tool_result","content":" 1→import { Component, signal, computed, ViewChild, ElementRef, AfterViewInit, OnDestroy, effect } from '@angular/core';\n 2→import { CommonModule } from '@angular/common';\n 3→import { MediaType, MediaItem, Track, TimelineState } from '../../models/timeline.models';\n 4→import { MediaLibraryComponent, MediaLibraryItem } from '../media-library/media-library.component';\n 5→import { Media***********onent } from '../media-toolbar/media-toolbar.component';\n 6→import { Notif************onent } from '../notifications/notifications.component';\n 7→import { Timel*************rvice } from '../../services/timeline-drag-drop.service';\n 8→import { PlaybackService } from '../../services/playback.service';\n 9→import { Timel************rvice } from '../../services/timeline-storage.service';\n 10→\n 11→@Component({\n 12→ selector: 'app-timeline',\n 13→ standalone: true,\n 14→ imports: [CommonModule, MediaLibraryComponent, MediaToolbarComponent, NotificationsComponent],\n 15→ templateUrl: './timeline.component.html',\n 16→ styleUrl: './timeline.component.css'\n 17→})\n 18→export class TimelineComponent implements AfterViewInit, OnDestroy {\n 19→ // Zoom levels: pixels per second\n 20→ private readonly MIN_ZOOM = 10;\n 21→ private readonly MAX_ZOOM = 200;\n 22→ private readonly ZOOM_STEP = 20;\n 23→ readonly TRACK_HEADER_WIDTH = 150; // Width of track header in pixels\n 24→ private readonly SNAP_PROXIMITY_MS = 500; // Snap to item if playhead is within 500ms\n 25→ private readonly MIN_ITEM_DURATION = 100; // Minimum item duration in milliseconds\n 26→\n 27→ // Canvas dimensions for preview\n 28→ readonly PREVIEW_WIDTH = 640;\n 29→ readonly PREVIEW_HEIGHT = 360;\n 30→\n 31→ // View references\n 32→ @ViewChild('timelineRuler') timeli
[2025-12-22T21:45:15.335Z] [INFO] neRuler?: ElementRef<HTMLElement>;\n 33→ @ViewChild('notifications') notificationsComponent?: NotificationsComponent;\n 34→ @ViewChild('previewCanvas') previewCanvas?: ElementRef<HTMLCanvasElement>;\n 35→\n 36→ // Timeline state\n 37→ readonly state = signal<TimelineState>({\n 38→ tracks: [\n 39→ { id: '1', name: 'Track 1', order: 0, items: [] },\n 40→ { id: '2', name: 'Track 2', order: 1, items: [] }\n 41→ ],\n 42→ playheadPosition: 0,\n 43→ zoomLevel: 50, // pixels per second\n 44→ totalDuration: 120000, // 120 seconds in milliseconds\n 45→ selectedItemId: null\n 46→ });\n 47→\n 48→ // Computed values\n 49→ readonly pixel**********econd = computed(() => {\n 50→ return this.state().zoomLevel / 1000;\n 51→ });\n 52→\n 53→ readonly timelineWidth = computed(() => {\n 54→ const state = this.state();\n 55→ // Calculate the maximum end time across all tracks\n 56→ let maxEndTime = state.totalDuration;\n 57→\n 58→ for (const track of state.tracks) {\n 59→ for (const item of track.items) {\n 60→ const itemEndTime = item.startTime + item.duration;\n 61→ if (itemEndTime > maxEndTime) {\n 62→ maxEndTime = itemEndTime;\n 63→ }\n 64→ }\n 65→ }\n 66→\n 67→ return maxEndTime * this.pixelsPerMillisecond();\n 68→ });\n 69→\n 70→ readonly timelineLineHeight = computed(() => {\n 71→ const state = this.state();\n 72→ return state.tracks.length * 60 + 32;\n 73→ });\n 74→\n 75→ readonly playheadPosition = computed(() => {\n 76→ return this.state().playheadPosition * this.pixelsPerMillisecond();\n 77→ });\n 78→\n 79→ readonly playh************ition = computed(() => {\n 80→ return this.playheadPosition() + this.TRACK_HEADER_WIDTH;\n 81→ });\n 82→\n 83→ // Computed: whether a media item is currently selected\n 84→ readonly hasSelectedItem = computed(() => {\n 85→ return this.state().selectedItemId !== null;\n 86→ });\n 87→\n 88→ // Dragging state\n 89→ private draggedItem: MediaItem | null = null;\n 90→ private draggedItemOriginalTrackId: string | null = null;\n 91→ private dragOffsetTime: number = 0; // Offset in milliseconds from item start to cursor position\n 92→ private isDraggingPlayhead = false;\n 93→ private isDraggingFromRuler = false;\n 94→ private resizingItem: { item: MediaItem; edge: 'left' | 'right' } | null = null;\n 95→ private mouseDownPosition: { x: number; y: number } | null = null; // Track mouse down position for click detection\n 96→\n 97→ // Video preview state\n 98→ readonly isPlaying = signal<boolean>(false);\n 99→\n 100→ // Duration editor state\n 101→ readonly showDurationEditor = signal<boolean>(false);\n 102→ private editedDuration: number = 120; // Duration in seconds\n 103→\n 104→ // Media library state\n 105→ readonly showMediaLibrary = signal<boolean>(false);\n 106→ private mediaLibraryTargetTrackId: string | null = null;\n 107→\n 108→ // Clipboard state for copy/paste functionality\n 109→ private readonly clipboardItem = signal<MediaItem | null>(null);\n 110→ private readonly clipb************ackId = signal<string | null>(null);\n 111→\n 112→ // Computed: whether a media item is in clipboard\n 113→ readonly hasClipboardItem = computed(() => {\n 114→ return this.clipboardItem() !== null;\n 115→ });\n 116→\n 117→ // Render loop ID for cleanup\n 118→ private renderLoopId: number | null = null;\n 119→\n 120→ constructor(\n 121→ private dragDropService: TimelineDragDropService,\n 122→ public playbackService: PlaybackService,\n 123→ private storageService: TimelineStorageService\n 124→ ) {\n 125→ // Load saved state from LocalStorage on initialization\n 126→ const savedState = this.storageService.loadState();\n 127→ if (savedState) {\n 128→ this.state.set(savedState);\n 129→ }\n 130→\n 131→ // Effect to sync playhead position from PlaybackService during playback\n 132→ effect(() => {\n 133→ if (this.playbackService.isPlaying()) {\n 134→ const position = this.playbackService.playheadPosition();\n 135→ this.state.update(s => ({\n 136→ ...s,\n 137→ playheadPosition: position\n 138→ }));\n 139→ }\n 140→ });\n 141→\n 142→ // Effect to auto-save timeline state to LocalStorage on any change\n 143→ effect(() => {\n 144→ const currentState = this.state();\n 145→ this.storageService.saveState(currentState);\n 146→ });\n 147→ }\n 148→\n 149→ ngAfterViewInit(): void {\n 150→ // Initialize canvas for preview rendering\n 151→ if (this.previewCanvas) {\n 152→ this.playbackService.setCanvas(this.previewCanvas.nativeElement);\n 153→ }\n 154→\n 155→ // Start continuous render loop for preview (renders current frame even when paused)\n 156→ this.startRenderLoop();\n 157→\n 158→ // Synchronize media and render initial frame if state was loaded from LocalStorage\n 159→ const currentState = this.state();\n 160→ if (currentState.tracks.length > 0) {\n 161→ this.playbackService.seek(currentState.tracks, currentState.playheadPosition);\n 162→ }\n 163→ }\n 164→\n 165→ ngOnDestroy(): void {\n 166→ // Clean up render loop\n 167→ if (this.renderLoopId !== null) {\n 168→ cancelAnimationFrame(this.renderLoopId);\n 169→ this.renderLoopId = null;\n 170→ }\n 171→\n 172→ // Stop playback\n 173→ this.playbackService.stop();\n 174→ }\n 175→\n 176→ /**\n 177→ * Continuous render loop for preview canvas.\n 178→ * Keeps rendering even when paused so seeking updates the preview.\n 179→ */\n 180→ private startRenderLoop(): void {\n 181→ const render = () => {\n 182→ // Only render if we have active media and are not playing\n 183→ // (PlaybackService handles rendering during playback)\n 184→ if (!this.playbackService.isPlaying()) {\n 185→ this.playbackService.renderCurrentFrame();\n 186→ }\n 187→ this.renderLoopId = requestAnimationFrame(render);\n 188→ };\n 189→ this.renderLoopId = requestAnimationFrame(render);\n 190→ }\n 191→\n 192→ // Track management\n 193→ addTrack(): void {\n 194→ const currentState = this.state();\n 195→ const newTrack: Track = {\n 196→ id: `track-${Date.now()}`,\n 197→ name: `Track ${currentState.tracks.length + 1}`,\n 198→ order: currentState.tracks.length,\n 199→ items: []\n 200→ };\n 201→\n 202→ this.state.update(s => ({\n 203→ ...s,\n 204→ tracks: [...s.tracks, newTrack]\n 205→ }));\n 206→\n 207→ // Show notification for adding track\n 208→ this.notificationsComponent?.showNotification(\n 209→ `Track \"${newTrack.name}\" added.`,\n 210→ 'success'\n 211→ );\n 212→ }\n 213→\n 214→ removeTrack(trackId: string): void {\n 215→ const currentState = this.state();\n 216→ if (currentState.tracks.length <= 1) {\n 217→ return; // Keep at least one track\n 218→ }\n 219→\n 220→ // Get track name before removing\n 221→ const trackToRemove = currentState.tracks.find(t => t.id === trackId);\n 222→ const trackName = trackToRemove?.name || 'Track';\n 223→\n 224→ this.state.update(s => ({\n 225→ ...s,\n 226→ tracks: s.tracks.filter(t => t.id !== trackId)\n 227→ }));\n 228→\n 229→ // Show notification for removing track\n 230→ this.notificationsComponent?.showNotification(\n 231→ `Track \"${trackName}\" removed.`,\n 232→ 'info'\n 233→ );\n 234→ }\n 235→\n 236→ // Zoom controls\n 237→ zoomIn(): void {\n 238→ this.state.update(s => ({\n 239→ ...s,\n 240→ zoomLevel: Math.min(s.zoomLevel + this.ZOOM_STEP, this.MAX_ZOOM)\n 241→ }));\n 242→ }\n 243→\n 244→ zoomOut(): void {\n 245→ this.state.update(s => ({\n 246→ ...s,\n 247→ zoomLevel: Math.max(s.zoomLevel - this.ZOOM_STEP, this.MIN_ZOOM)\n 248→ }));\n 249→ }\n 250→\n 251→ // Utility method to extract coordinates from mouse or touch events\n 252→ private getEventCoordinates(event: MouseEvent | TouchEvent): { clientX: number; clientY: number } {\n 253→ if (event instanceof MouseEvent) {\n 254→ return { clientX: event.clientX, clientY: event.clientY };\n 255→ } else {\n 256→ const touch = event.touches[0] || event.changedTouches[0];\n 257→ return { clientX: touch.clientX, clientY: touch.clientY };\n 258→ }\n 259→ }\n 260→\n 261→ // Playhead controls\n 262→ onRulerPointerDown(event: MouseEvent | TouchEvent): void {\n 263→ event.preventDefault();\n 264→ this.isDraggingFromRuler = true;\n 265→\n 266→ // Immediately update position on pointer down\n 267→ const target = event.currentTarget as HTMLElement;\n 268→ const rect = target.getBoundingClientRect();\n 269→ const coords = this.getEventCoordinates(event);\n 270→ // Calculate position within the ruler element\n 271→ // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n 272→ const x = coords.clientX - rect.left;\n 273→ const newPosition = x / this.pixelsPerMillisecond();\n 274→ const currentState = this.state();\n 275→ const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n 276→\n 277→ this.state.update(s => ({\n 278→ ...s,\n 279→ playheadPosition: clampedPosition\n 280→ }));\n 281→\n 282→ // Sync position to playback service for seeking\n 283→ this.playbackService.seek(currentState.tracks, clampedPosition);\n 284→ }\n 285→\n 286→ onPlayheadPointerDown(event: MouseEvent | TouchEvent): void {\n 287→ event.preventDefault();\n 288→ event.stopPropagation();\n 289→ this.isDraggingPlayhead = true;\n 290→ }\n 291→\n 292→\n 293→ // Media item drag and drop\n 294→ onMediaItemPointerDown(event: MouseEvent | TouchEvent, item: MediaItem, track: Track): void {\n 295→ const target = event.target as HTMLElement;\n 296→\n 297→ // Check if clicking/touching on resize handle\n 298→ if (target.classList.contains('resize-handle')) {\n 299→ this.resizingItem = {\n 300→ item,\n 301→ edge: target.classList.contains('resize-handle-left') ? 'left' : 'right'\n 302→ };\n 303→ event.preventDefault();\n 304→ return;\n 305→ }\n 306→\n 307→ const coords = this.getEventCoordinates(event);\n 308→ this.mouseDownPosition = { x: coords.clientX, y: coords.clientY };\n 309→\n 310→ const mediaItemElement = event.currentTarget as HTMLElement;\n 311→ const rect = mediaItemElement.getBoundingClientRect();\n 312→ const clickX = coords.clientX - rect.left;\n 313→\n 314→ // Convert pixel offset to time offset\n 315→ this.dragOffsetTime = clickX / this.pixelsPerMillisecond();\n 316→\n 317→ this.draggedItem = item;\n 318→ this.draggedItemOriginalTrackId = track.id;\n 319→ event.preventDefault();\n 320→ }\n 321→\n 322→ onTrackPointerDown(event: MouseEvent | TouchEvent): void {\n 323→ // Deselect when clicking/touching track background (not on media item)\n 324→ const target = event.target as HTMLElement;\n 325→ if (target.classList.contains('track')) {\n 326→ this.deselectMediaItem();\n 327→ }\n 328→ }\n 329→\n 330→ onTrackPointerMove(event: MouseEvent | TouchEvent, track: Track): void {\n 331→ if (this.resizingItem) {\n 332→ this.handleResize(event, track);\n 333→ return;\n 334→ }\n 335→ event.preventDefault();\n 336→ event.stopPropagation();\n 337→\n 338→ if (!this.draggedItem) return;\n 339→\n 340→ const coords = this.getEventCoordinates(event);\n 341→ const target = event.currentTarget as HTMLElement;\n 342→ const rect = target.getBoundingClientRect();\n 343→ const x = coords.clientX - rect.left;\n 344→ const requestedStartTime = Math.max(0, x / this.pixelsPerMillisecond() - this.dragOffsetTime);\n 345→\n 346→ this.state.update(s => {\n 347→ const updatedTracks = s.tracks.map(t => {\n 348→ if (t.id === track.id) {\n 349→ // Get all items except the dragged one for collision detection\n 350→ const otherItems = t.items.filter(i => i.id !== this.draggedItem!.id);\n 351→\n 352→ // Fix for issue #81: Find snap targets (playhead and items on all tracks)\n 353→ const snapTargets = this.dragDropService.findSnapTargets(\n 354→ this.draggedItem!.id,\n 355→ s.tracks,\n 356→ s.playheadPosition\n 357→ );\n 358→\n 359→ // Calculate valid position and duration considering collisions, gap fitting, and snapping\n 360→ const validPosition = this.dragDropService.getValidDragPosition(\n 361→ this.draggedItem!,\n 362→ requestedStartTime,\n 363→ otherItems,\n 364→ s.totalDuration,\n 365→ snapTargets\n 366→ );\n 367→\n 368→ // Check if item already exists in this track\n 369→ const itemExists = t.items.some(i => i.id === this.draggedItem!.id);\n 370→\n 371→ if (itemExists) {\n 372→ // Update position and duration in current track\n 373→ return {\n 374→ ...t,\n 375→ items: t.items.map(i =>\n 376→ i.id === this.draggedItem!.id\n 377→ ? {\n 378→ ...i,\n 379→ startTime: validPosition.startTime,\n 380→ duration: validPosition.duration,\n 381→ trackId: track.id\n 382→ }\n 383→ : i\n 384→ )\n 385→ };\n 386→ } else {\n 387→ // Add to new track with adjusted position and duration\n 388→ return {\n 389→ ...t,\n 390→ items: [\n 391→ ...otherItems,\n 392→ {\n 393→ ...this.draggedItem!,\n 394→ startTime: validPosition.startTime,\n 395→ duration: validPosition.duration,\n 396→ trackId: track.id\n 397→ }\n 398→ ]\n 399→ };\n 400→ }\n 401→ } else if (t.id === this.draggedItemOriginalTrackId && t.id !== track.id) {\n 402→ // Remove from original track only if moving to different track\n 403→ return {\n 404→ ...t,\n 405→ items: t.items.filter(i => i.id !== this.draggedItem!.id)\n 406→ };\n 407→ }\n 408→ return t;\n 409→ });\n 410→\n 411→ // Update the original track ID to current track for smooth dragging within same track\n 412→ this.draggedItemOriginalTrackId = track.id;\n 413→\n 414→ return { ...s, tracks: updatedTracks };\n 415→ });\n 416→ }\n 417→\n 418→ private handleResize(event: MouseEvent | TouchEvent, track: Track): void {\n 419→ if (!this.resizingItem) return;\n 420→\n 421→ const coords = this.getEventCoordinates(event);\n 422→ const target = event.currentTarget as HTMLElement;\n 423→ const rect = target.getBoundingClientRect();\n 424→ // Fix for issue #83: getBoundingClientRect() returns viewport-relative coordinates,\n 425→ // and coords.clientX is also viewport-relative, so we don't need to add scrollLeft\n 426→ const x = coords.clientX - rect.left;\n 427→ const timeAtCursor = x / this.pixelsPerMillisecond();\n 428→\n 429→ this.state.update(s => {\n 430→ // Fix for issue #87: Find snap targets for resize operations\n 431→ const snapTargets = this.dragDropService.findSnapTargets(\n 432→ this.resizingItem!.item.id,\n 433→ s.tracks,\n 434→ s.playheadPosition\n 435→ );\n 436→\n 437→ const updatedTracks = s.tracks.map(t => {\n 438→ if (t.id === track.id) {\n 439→ // Get resize bounds considering adjacent items\n 440→ const bounds = this.dragDropService.getResizeBounds(\n 441→ this.resizingItem!.item,\n 442→ t.items,\n 443→ this.resizingItem!.edge,\n 444→ s.totalDuration\n 445→ );\n 446→\n 447→ return {\n 448→ ...t,\n 449→ items: t.items.map(i => {\n 450→ if (i.id === this.resizingItem!.item.id) {\n 451→ if (this.resizingItem!.edge === 'left') {\n 452→ // Fix for issue #89: Handle mediaStartTime when resizing from left\n 453→ // Apply snapping to left edge (start time)\n 454→ let newStartTime = Math.max(\n 455→ bounds.minTime,\n 456→ Math.min(timeAtCursor, bounds.maxTime)\n 457→ );\n 458→\n 459→ // Apply snapping if within snap distance\n 460→ let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n 461→ for (const target of snapTargets) {\n 462→ const distance = Math.abs(newStartTime - target);\n 463→ if (distance < minDistance) {\n 464→ minDistance = distance;\n 465→ // Only snap if within bounds\n 466→ if (target >= bounds.minTime && target <= bounds.maxTime) {\n 467→ newStartTime = target;\n 468→ }\n 469→ }\n 470→ }\n 471→\n 472→ // Calculate how much the timeline position is changing\n 473→ const deltaTime = newStartTime - i.startTime;\n 474→ const newDuration = i.duration - deltaTime;\n 475→\n 476→ // Update media start time (trimming from source media)\n 477→ const curre***********tTime = i.mediaStartTime || 0;\n 478→ const newMediaStartTime = curre***********tTime + deltaTime;\n 479→\n 480→ // Check if we're trying to extend beyond the start of source media\n 481→ if (newMediaStartTime < 0) {\n 482→ // Can only extend left by curre***********tTime amount\n 483→ const maxExtension = currentMediaStartTime;\n 484→ const finalStartTime = i.startTime - maxExtension;\n 485→ const finalDuration = i.duration + maxExtension;\n 486→\n 487→ // Ensure we don't exceed maxDuration\n 488→ if (i.maxDuration && finalDuration > i.maxDuration) {\n 489→ return {\n 490→ ...i,\n 491→ startTime: finalStartTime + (finalDuration - i.maxDuration),\n 492→ duration: i.maxDuration,\n 493→ mediaStartTime: 0\n 494→ };\n 495→ }\n 496→\n 497→ return {\n 498→ ...i,\n 499→ startTime: finalStartTime,\n 500→ duration: finalDuration,\n 501→ mediaStartTime: 0\n 502→ };\n 503→ }\n 504→\n 505→ // Ensure media end doesn't exceed maxDuration\n 506→ if (i.maxDuration && newMediaStartTime + newDuration > i.maxDuration) {\n 507→ const maxAllowedDuration = i.maxDuration - newMediaStartTime;\n 508→ return {\n 509→ ...i,\n 510→ startTime: i.startTime + (i.duration - maxAllowedDuration),\n 511→ duration: maxAllowedDuration,\n 512→ mediaStartTime: newMediaStartTime\n 513→ };\n 514→ }\n 515→\n 516→ return {\n 517→ ...i,\n 518→ startTime: newStartTime,\n 519→ duration: newDuration,\n 520→ mediaStartTime: newMediaStartTime\n 521→ };\n 522→ } else {\n 523→ // Fix for issue #87: Apply snapping to right edge (end time)\n 524→ let newEndTime = Math.max(\n 525→ bounds.minTime,\n 526→ Math.min(timeAtCursor, bounds.maxTime)\n 527→ );\n 528→\n 529→ // Apply snapping if within snap distance\n 530→ let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n 531→ for (const target of snapTargets) {\n 532→ const distance = Math.abs(newEndTime - target);\n 533→ if (distance < minDistance) {\n 534→ minDistance = distance;\n 535→ // Only snap if within bounds\n 536→ if (target >= bounds.minTime && target <= bounds.maxTime) {\n 537→ newEndTime = target;\n 538→ }\n 539→ }\n 540→ }\n 541→\n 542→ const newDuration = newEndTime - i.startTime;\n 543→\n 544→ // Limit duration by maxDuration if specified\n 545→ const limitedDuration = i.maxDuration\n 546→ ? Math.min(newDuration, i.maxDuration)\n 547→ : newDuration;\n 548→\n 549→ return { ...i, duration: limitedDuration };\n 550→ }\n 551→ }\n 552→ return i;\n 553→ })\n 554→ };\n 555→ }\n 556→ return t;\n 557→ });\n 558→\n 559→ return { ...s, tracks: updatedTracks };\n 560→ });\n 561→ }\n 562→\n 563→ onPointerUp(event: MouseEvent | TouchEvent): void {\n 564→ // Detect if this was a click/tap (not a drag) on a media item\n 565→ if (this.draggedItem && this.mouseDownPosition) {\n 566→ const coords = this.getEventCoordinates(event);\n 567→ const dx = coords.clientX - this.mouseDownPosition.x;\n 568→ const dy = coords.clientY - this.mouseDownPosition.y;\n 569→ const distance = Math.sqrt(dx * dx + dy * dy);\n 570→\n 571→ // If pointer moved less than 5 pixels, consider it a click/tap\n 572→ if (distance < 5) {\n 573→ this.selectMediaItem(this.draggedItem.id);\n 574→ }\n 575→ }\n 576→\n 577→ this.draggedItem = null;\n 578→ this.draggedItemOriginalTrackId = null;\n 579→ this.dragOffsetTime = 0;\n 580→ this.isDraggingPlayhead = false;\n 581→ this.isDraggingFromRuler = false;\n 582→ this.resizingItem = null;\n 583→ this.mouseDownPosition = null;\n 584→ }\n 585→\n 586→ onDocumentPointerMove(event: MouseEvent | TouchEvent): void {\n 587→ if (this.isDraggingPlayhead || this.isDraggingFromRuler) {\n 588→ // Fix for issue #50: Use ViewChild reference to ensure we use the exact same element as onRulerPointerDown\n 589→ if (!this.timelineRuler) {\n 590→ return;\n 591→ }\n 592→\n 593→ const coords = this.getEventCoordinates(event);\n 594→ const rulerElement = this.timelineRuler.nativeElement;\n 595→ // Use the same calculation as onRulerPointerDown\n 596→ // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n 597→ const rect = rulerElement.getBoundingClientRect();\n 598→ const x = coords.clientX - rect.left;\n 599→ const newPosition = x / this.pixelsPerMillisecond();\n 600→ const currentState = this.state();\n 601→ const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n 602→\n 603→ this.state.update(s => ({\n 604→ ...s,\n 605→ playheadPosition: clampedPosition\n 606→ }));\n 607→\n 608→ // Sync position to playback service for seeking (but don't call too frequently during drag)\n 609→ this.playbackService.seek(currentState.tracks, clampedPosition);\n 610→ }\n 611→\n 612→ // Fix for issue #96: Handle media item dragging and resizing at document level for touch events\n 613→ // This allows dragging between tracks on mobile devices\n 614→ if (event instanceof TouchEvent) {\n 615→ if (this.draggedItem) {\n 616→ // Find which track the touch is currently over\n 617→ const targetTrack = this.findTrackAtCoordinates(this.getEventCoordinates(event));\n 618→ if (targetTrack) {\n 619→ // Reuse existing drag logic\n 620→ this.onTrackPointerMove(event, targetTrack);\n 621→ }\n 622→ } else if (this.resizingItem) {\n 623→ // Find the track that contains the resizing item\n 624→ const targetTrack = this.findTrackContainingItem(this.resizingItem.item.id);\n 625→ if (targetTrack) {\n 626→ // Reuse existing resize logic\n 627→ this.handleResize(event, targetTrack);\n 628→ }\n 629→ }\n 630→ }\n 631→ }\n 632→\n 633→ // Helper method to find which track is at the given Y coordinate\n 634→ private findTrackAtCoordinates(coords: { clientX: number; clientY: number }): Track | null {\n 635→ const trackElements = document.querySelectorAll('.track');\n 636→ for (const trackElement of Array.from(trackElements)) {\n 637→ const rect = trackElement.getBoundingClientRect();\n 638→ if (coords.clientY >= rect.top && coords.clientY <= rect.bottom) {\n 639→ const trackIndex = Array.from(trackElements).indexOf(trackElement);\n 640→ const tracks = this.state().tracks;\n 641→ if (trackIndex >= 0 && trackIndex < tracks.length) {\n 642→ return tracks[trackIndex];\n 643→ }\n 644→ }\n 645→ }\n 646→ return null;\n 647→ }\n 648→\n 649→ // Helper method to find the track containing a specific item\n 650→ private findTrackContainingItem(itemId: string): Track | null {\n 651→ const currentState = this.state();\n 652→ for (const track of currentState.tracks) {\n 653→ if (track.items.some(item => item.id === itemId)) {\n 654→ return track;\n 655→ }\n 656→ }\n 657→ return null;\n 658→ }\n 659→\n 660→ // Helper methods\n 661→ getItemStyle(item: MediaItem) {\n 662→ return {\n 663→ left: `${item.startTime * this.pixelsPerMillisecond()}px`,\n 664→ width: `${item.duration * this.pixelsPerMillisecond()}px`\n 665→ };\n 666→ }\n 667→\n 668→ getMediaTypeClass(type: MediaType): string {\n 669→ return `media-${type}`;\n 670→ }\n 671→\n 672→ formatTime(milliseconds: number): string {\n 673→ const seconds = Math.floor(milliseconds / 1000);\n 674→ const minutes = Math.floor(seconds / 60);\n 675→ const remainingSeconds = seconds % 60;\n 676→ const cs = Math.floor((milliseconds % 1000) / 10);\n 677→ return `${minutes}:${remainingSeconds.toString().padStart(2, '0')}.${cs.toString().padStart(2, '0')}`;\n 678→ }\n 679→\n 680→ /**\n 681→ * Calculate appropriate time interval for markers based on zoom level\n 682→ * to prevent marker labels from overlapping\n 683→ */\n 684→ private getMarkerInterval(): number {\n 685→ // Minimum spacing between markers in pixels to prevent overlap\n 686→ // Enough space for \"0:00.000\" text (about 50-60px)\n 687→ const MIN_M***********NG_PX = 60;\n 688→\n 689→ // Calculate how much time represents MIN_M***********NG_PX at current zoom\n 690→ const pixelsPerMs = this.pixelsPerMillisecond();\n 691→ const minTimeSpacing = MIN_M***********NG_PX / pixelsPerMs;\n 692→\n 693→ // Define possible intervals (in ms): 100ms, 250ms, 500ms, 1s, 2s, 5s, 10s, 30s, 60s\n 694→ const intervals = [100, 250, 500, 1000, 2000, 5000, 10000, 30000, 60000];\n 695→\n 696→ // Find the smallest interval that's larger than or equal to minTimeSpacing\n 697→ for (const interval of intervals) {\n 698→ if (interval >= minTimeSpacing) {\n 699→ return interval;\n 700→ }\n 701→ }\n 702→\n 703→ // If even 60s is too small, use larger intervals\n 704→ return Math.ceil(minTimeSpacing / 60000) * 60000;\n 705→ }\n 706→\n 707→ getTimeMarkers(): { position: number; label: string }[] {\n 708→ const markers: { position: number; label: string }[] = [];\n 709→ const stepMs = this.getMarkerInterval(); // Dynamic interval based on zoom level\n 710→\n 711→ // Fix for issue #85: Do not show the last time mark at totalDuration\n 712→ // to prevent container expansion from the text label\n 713→ for (let time = 0; time < this.state().totalDuration; time += stepMs) {\n 714→ markers.push({\n 715→ position: time * this.pixelsPerMillisecond(),\n 716→ label: this.formatTime(time)\n 717→ });\n 718→ }\n 719→\n 720→ return markers;\n 721→ }\n 722→\n 723→ // Add placeholder media item\n 724→ addMediaItem(type: MediaType, trackId: string): void {\n 725→ const currentState = this.state();\n 726→ const track = currentState.tracks.find(t => t.id === trackId);\n 727→\n 728→ if (!track) return;\n 729→\n 730→ const playheadTime = currentState.playheadPosition;\n 731→ const totalDuration = currentState.totalDuration;\n 732→ const newItemDuration = type === MediaType.IMAGE ? 5000 : 3000;\n 733→\n 734→ // Determine the start time for the new item using the service\n 735→ const startTime = this.dragDropService.calculateNewItemStartTime(\n 736→ playheadTime,\n 737→ track.items,\n 738→ this.SNAP_PROXIMITY_MS\n 739→ );\n 740→\n 741→ // Fix for issue #48: Ensure new item doesn't exceed totalDuration\n 742→ const maxAllowedDuration = totalDuration - startTime;\n 743→ const finalDuration = Math.min(newItemDuration, maxAllowedDuration);\n 744→\n 745→ // Fix for issue #64: Verify that the new item doesn't overlap with any existing items\n 746→ const testItem: MediaItem = {\n 747→ id: 'temp',\n 748→ type,\n 749→ startTime,\n 750→ duration: finalDuration,\n 751→ trackId,\n 752→ name: '',\n 753→ isPlaceholder: true\n 754→ };\n 755→\n 756→ // Validate and adjust position if needed\n 757→ const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n 758→\n 759→ // Recalculate duration limit if position was adjusted\n 760→ const adjus****************ation = totalDuration - validatedStartTime;\n 761→ const adjustedDuration = Math.min(newItemDuration, adjustedMaxAllowedDuration);\n 762→\n 763→ // Create the final non-overlapping item\n 764→ const newItem: MediaItem = {\n 765→ id: `item-${Date.now()}`,\n 766→ type,\n 767→ startTime: validatedStartTime,\n 768→ duration: adjustedDuration,\n 769→ trackId,\n 770→ name: `${type} placeholder`,\n 771→ isPlaceholder: true\n 772→ };\n 773→\n 774→ // Set maxDuration for audio and video placeholders\n 775→ if (type === MediaType.VIDEO) {\n 776→ newItem.maxDuration = Math.min(10000, adjustedMaxAllowedDuration); // 10 seconds default for video\n 777→ } else if (type === MediaType.AUDIO) {\n 778→ newItem.maxDuration = Math.min(15000, adjustedMaxAllowedDuration); // 15 seconds default for audio\n 779→ }\n 780→\n 781→ this.state.update(s => ({\n 782→ ...s,\n 783→ tracks: s.tracks.map(t =>\n 784→ t.id === trackId\n 785→ ? { ...t, items: [...t.items, newItem] }\n 786→ : t\n 787→ )\n 788→ }));\n 789→\n 790→ // Show notification for adding media\n 791→ this.notificationsComponent?.showNotification(\n 792→ 'Media added to timeline.',\n 793→ 'success'\n 794→ );\n 795→ }\n 796→\n 797→ removeMediaItem(itemId: string, trackId: string): void {\n 798→ this.state.update(s => ({\n 799→ ...s,\n 800→ tracks: s.tracks.map(t =>\n 801→ t.id === trackId\n 802→ ? { ...t, items: t.items.filter(i => i.id !== itemId) }\n 803→ : t\n 804→ ),\n 805→ // Deselect if removing selected item\n 806→ selectedItemId: s.selectedItemId === itemId ? null : s.selectedItemId\n 807→ }));\n 808→\n 809→ // Show notification for removing media\n 810→ this.notificationsComponent?.showNotification(\n 811→ 'Media removed from timeline.',\n 812→ 'info'\n 813→ );\n 814→ }\n 815→\n 816→ // Media selection\n 817→ selectMediaItem(itemId: string): void {\n 818→ this.state.update(s => ({\n 819→ ...s,\n 820→ selectedItemId: itemId\n 821→ }));\n 822→ }\n 823→\n 824→ deselectMediaItem(): void {\n 825→ this.state.update(s => ({\n 826→ ...s,\n 827→ selectedItemId: null\n 828→ }));\n 829→ }\n 830→\n 831→ isItemSelected(itemId: string): boolean {\n 832→ return this.state().selectedItemId === itemId;\n 833→ }\n 834→\n 835→ readonly MediaType = MediaType;\n 836→\n 837→ /**\n 838→ * Create a new project by clearing the timeline and LocalStorage\n 839→ */\n 840→ newProject(): void {\n 841→ // Stop playback if playing\n 842→ if (this.playbackService.isPlaying()) {\n 843→ this.playbackService.stop();\n 844→ this.isPlaying.set(false);\n 845→ }\n 846→\n 847→ // Reset timeline state to initial values\n 848→ this.state.set({\n 849→ tracks: [\n 850→ { id: '1', name: 'Track 1', order: 0, items: [] },\n 851→ { id: '2', name: 'Track 2', order: 1, items: [] }\n 852→ ],\n 853→ playheadPosition: 0,\n 854→ zoomLevel: 50,\n 855→ totalDuration: 120000,\n 856→ selectedItemId: null\n 857→ });\n 858→\n 859→ // Clear LocalStorage\n 860→ this.storageService.clearState();\n 861→\n 862→ // Show notification\n 863→ this.notificationsComponent?.showNotification(\n 864→ 'New project created. Timeline cleared.',\n 865→ 'success'\n 866→ );\n 867→ }\n 868→\n 869→ // Video preview controls\n 870→ togglePlayback(): void {\n 871→ const currentState = this.state();\n 872→\n 873→ if (this.playbackService.isPlaying()) {\n 874→ this.playbackService.pause();\n 875→ this.isPlaying.set(false);\n 876→ } else {\n 877→ // Sync playhead position to PlaybackService before starting\n 878→ this.playbackService.setPlayheadPosition(currentState.playheadPosition);\n 879→ this.playbackService.play(currentState.tracks, currentState.totalDuration);\n 880→ this.isPlaying.set(true);\n 881→ }\n 882→ }\n 883→\n 884→ skipBackward(): void {\n 885→ const currentState = this.state();\n 886→ const newPosition = Math.max(0, currentState.playheadPosition - 5000);\n 887→\n 888→ this.state.update(s => ({\n 889→ ...s,\n 890→ playheadPosition: newPosition\n 891→ }));\n 892→\n 893→ // Sync position and update media\n 894→ this.playbackService.seek(currentState.tracks, newPosition);\n 895→ }\n 896→\n 897→ skipForward(): void {\n 898→ const currentState = this.state();\n 899→ const newPosition = Math.min(currentState.totalDuration, currentState.playheadPosition + 5000);\n 900→\n 901→ this.state.update(s => ({\n 902→ ...s,\n 903→ playheadPosition: newPosition\n 904→ }));\n 905→\n 906→ // Sync position and update media\n 907→ this.playbackService.seek(currentState.tracks, newPosition);\n 908→ }\n 909→\n 910→ // Duration editor methods\n 911→ openDurationEditor(): void {\n 912→ this.editedDuration = this.state().totalDuration / 1000;\n 913→ this.showDurationEditor.set(true);\n 914→ }\n 915→\n 916→ closeDurationEditor(): void {\n 917→ this.showDurationEditor.set(false);\n 918→ }\n 919→\n 920→ onDurationInputChange(event: Event): void {\n 921→ const input = event.target as HTMLInputElement;\n 922→ const value = parseFloat(input.value);\n 923→ if (!isNaN(value) && value > 0) {\n 924→ this.editedDuration = value;\n 925→ }\n 926→ }\n 927→\n 928→ saveDuration(): void {\n 929→ const newDurationMs = Math.max(1000, this.editedDuration * 1000); // At least 1 second\n 930→ this.state.update(s => ({\n 931→ ...s,\n 932→ totalDuration: newDurationMs,\n 933→ // Ensure playhead doesn't exceed new duration\n 934→ playheadPosition: Math.min(s.playheadPosition, newDurationMs)\n 935→ }));\n 936→ this.closeDurationEditor();\n 937→ }\n 938→\n 939→ // Media library methods\n 940→ openMediaLibrary(trackId: string): void {\n 941→ this.mediaLibraryTargetTrackId = trackId;\n 942→ this.showMediaLibrary.set(true);\n 943→ }\n 944→\n 945→ closeMediaLibrary(): void {\n 946→ this.showMediaLibrary.set(false);\n 947→ this.mediaLibraryTargetTrackId = null;\n 948→ }\n 949→\n 950→ onMediaSelected(media: MediaLibraryItem): void {\n 951→ if (!this.mediaLibraryTargetTrackId) return;\n 952→\n 953→ const currentState = this.state();\n 954→ const track = currentState.tracks.find(t => t.id === this.mediaLibraryTargetTrackId);\n 955→\n 956→ if (!track) return;\n 957→\n 958→ const playheadTime = currentState.playheadPosition;\n 959→ const totalDuration = currentState.totalDuration;\n 960→\n 961→ // Determine the start time for the new item using the service\n 962→ const startTime = this.dragDropService.calculateNewItemStartTime(\n 963→ playheadTime,\n 964→ track.items,\n 965→ this.SNAP_PROXIMITY_MS\n 966→ );\n 967→\n 968→ // Ensure item doesn't exceed totalDuration\n 969→ const maxAllowedDuration = totalDuration - startTime;\n 970→ const finalDuration = Math.min(media.duration, maxAllowedDuration);\n 971→\n 972→ // Verify that the new item doesn't overlap with any existing items\n 973→ const testItem: MediaItem = {\n 974→ id: 'temp',\n 975→ type: media.type,\n 976→ startTime,\n 977→ duration: finalDuration,\n 978→ trackId: this.mediaLibraryTargetTrackId,\n 979→ name: '',\n 980→ isPlaceholder: false\n 981→ };\n 982→\n 983→ // Validate and adjust position if needed\n 984→ const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n 985→\n 986→ // Recalculate duration limit if position was adjusted\n 987→ const adjus****************ation = totalDuration - validatedStartTime;\n 988→ const adjustedDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n 989→\n 990→ // Create the final non-overlapping item\n 991→ const newItem: MediaItem = {\n 992→ id: `item-${Date.now()}`,\n 993→ type: media.type,\n 994→ startTime: validatedStartTime,\n 995→ duration: adjustedDuration,\n 996→ trackId: this.mediaLibraryTargetTrackId,\n 997→ name: media.name,\n 998→ url: media.url, // Pass URL from media library for playback\n 999→ isPlaceholder: false\n 1000→ };\n 1001→\n 1002→ // Set maxDuration for audio and video\n 1003→ if (media.type === MediaType.VIDEO) {\n 1004→ newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n 1005→ } else if (media.type === MediaType.AUDIO) {\n 1006→ newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n 1007→ }\n 1008→\n 1009→ this.state.update(s => ({\n 1010→ ...s,\n 1011→ tracks: s.tracks.map(t =>\n 1012→ t.id === this.mediaLibraryTargetTrackId\n 1013→ ? { ...t, items: [...t.items, newItem] }\n 1014→ : t\n 1015→ )\n 1016→ }));\n 1017→\n 1018→ // Show notification for adding media\n 1019→ this.notificationsComponent?.showNotification(\n 1020→ `\"${media.name}\" added to timeline.`,\n 1021→ 'success'\n 1022→ );\n 1023→\n 1024→ // Close the media library after selection\n 1025→ this.closeMediaLibrary();\n 1026→ }\n 1027→\n 1028→ /**\n 1029→ * Trim (split) the selected media item at the playhead position.\n 1030→ * Creates two separate items from the original media.\n 1031→ */\n 1032→ trimSelectedMedia(): void {\n 1033→ const currentState = this.state();\n 1034→ const selectedItemId = currentState.selectedItemId;\n 1035→\n 1036→ if (!selectedItemId) {\n 1037→ return;\n 1038→ }\n 1039→\n 1040→ // Find the selected item and its track\n 1041→ let selectedItem: MediaItem | null = null;\n 1042→ let selectedTrack: Track | null = null;\n 1043→\n 1044→ for (const track of currentState.tracks) {\n 1045→ const item = track.items.find(i => i.id === selectedItemId);\n 1046→ if (item) {\n 1047→ selectedItem = item;\n 1048→ selectedTrack = track;\n 1049→ break;\n 1050→ }\n 1051→ }\n 1052→\n 1053→ if (!selectedItem || !selectedTrack) {\n 1054→ return;\n 1055→ }\n 1056→\n 1057→ const playheadTime = currentState.playheadPosition;\n 1058→ const itemStart = selectedItem.startTime;\n 1059→ const itemEnd = itemStart + selectedItem.duration;\n 1060→\n 1061→ // Check if playhead is within the selected media item\n 1062→ if (playheadTime <= itemStart || playheadTime >= itemEnd) {\n 1063→ // Playhead is not within the selected media - show notification\n 1064→ this.notificationsComponent?.showNotification(\n 1065→ 'Position the playhead within the selected media to trim it.',\n 1066→ 'warning'\n 1067→ );\n 1068→ return;\n 1069→ }\n 1070→\n 1071→ // Ensure both parts will have at least MIN_ITEM_DURATION\n 1072→ const firstPartDuration = playheadTime - itemStart;\n 1073→ const secondPartDuration = itemEnd - playheadTime;\n 1074→\n 1075→ if (firstPartDuration < this.MIN_ITEM_DURATION || secondPartDuration < this.MIN_ITEM_DURATION) {\n 1076→ this.notificationsComponent?.showNotification(\n 1077→ 'Cannot trim: resulting parts would be too short.',\n 1078→ 'warning'\n 1079→ );\n 1080→ return;\n 1081→ }\n 1082→\n 1083→ // Calculate mediaStartTime adjustments\n 1084→ const origi************tTime = selectedItem.mediaStartTime || 0;\n 1085→ const secon**************tTime = origi************tTime + firstPartDuration;\n 1086→\n 1087→ // Create two new items from the original\n 1088→ const firstPart: MediaItem = {\n 1089→ ...selectedItem,\n 1090→ id: `item-${Date.now()}-1`,\n 1091→ duration: firstPartDuration\n 1092→ // mediaStartTime stays the same for first part\n 1093→ };\n 1094→\n 1095→ const secondPart: MediaItem = {\n 1096→ ...selectedItem,\n 1097→ id: `item-${Date.now()}-2`,\n 1098→ startTime: playheadTime,\n 1099→ duration: secondPartDuration,\n 1100→ mediaStartTime: secondPartMediaStartTime\n 1101→ };\n 1102→\n 1103→ // Update the state: remove original, add two new parts\n 1104→ this.state.update(s => ({\n 1105→ ...s,\n 1106→ tracks: s.tracks.map(t => {\n 1107→ if (t.id === selectedTrack!.id) {\n 1108→ return {\n 1109→ ...t,\n 1110→ items: [\n 1111→ ...t.items.filter(i => i.id !== selectedItemId),\n 1112→ firstPart,\n 1113→ secondPart\n 1114→ ]\n 1115→ };\n 1116→ }\n 1117→ return t;\n 1118→ }),\n 1119→ // Deselect after trimming\n 1120→ selectedItemId: null\n 1121→ }));\n 1122→\n 1123→ this.notificationsComponent?.showNotification(\n 1124→ 'Media trimmed successfully.',\n 1125→ 'success'\n 1126→ );\n 1127→ }\n 1128→\n 1129→ /**\n 1130→ * Copy the selected media item to the clipboard.\n 1131→ * Stores a copy of the item and the track it was copied from.\n 1132→ */\n 1133→ copySelectedMedia(): void {\n 1134→ const currentState = this.state();\n 1135→ const selectedItemId = currentState.selectedItemId;\n 1136→\n 1137→ if (!selectedItemId) {\n 1138→ return;\n 1139→ }\n 1140→\n 1141→ // Find the selected item and its track\n 1142→ let selectedItem: MediaItem | null = null;\n 1143→ let selectedTrackId: string | null = null;\n 1144→\n 1145→ for (const track of currentState.tracks) {\n 1146→ const item = track.items.find(i => i.id === selectedItemId);\n 1147→ if (item) {\n 1148→ selectedItem = item;\n 1149→ selectedTrackId = track.id;\n 1150→ break;\n 1151→ }\n 1152→ }\n 1153→\n 1154→ if (!selectedItem || !selectedTrackId) {\n 1155→ return;\n 1156→ }\n 1157→\n 1158→ // Store a copy of the item in clipboard\n 1159→ this.clipboardItem.set({ ...selectedItem });\n 1160→ this.clipboardSourceTrackId.set(selectedTrackId);\n 1161→\n 1162→ this.notificationsComponent?.showNotification(\n 1163→ 'Media copied to clipboard.',\n 1164→ 'success'\n 1165→ );\n 1166→ }\n 1167→\n 1168→ /**\n 1169→ * Paste the clipboard media item at the playhead position.\n 1170→ * Pastes on the same track where the item was copied from.\n 1171→ * If there's no space at playhead position, finds the next available slot.\n 1172→ */\n 1173→ pasteMedia(): void {\n 1174→ const copiedItem = this.clipboardItem();\n 1175→ const sourceTrackId = this.clipboardSourceTrackId();\n 1176→\n 1177→ if (!copiedItem || !sourceTrackId) {\n 1178→ return;\n 1179→ }\n 1180→\n 1181→ const currentState = this.state();\n 1182→ const playheadTime = currentState.playheadPosition;\n 1183→ const totalDuration = currentState.totalDuration;\n 1184→\n 1185→ // Find the source track\n 1186→ let targetTrack = currentState.tracks.find(t => t.id === sourceTrackId);\n 1187→\n 1188→ // If source track no longer exists, use the first track\n 1189→ if (!targetTrack) {\n 1190→ targetTrack = currentState.tracks[0];\n 1191→ if (!targetTrack) {\n 1192→ this.notificationsComponent?.showNotification(\n 1193→ 'No tracks available to paste media.',\n 1194→ 'error'\n 1195→ );\n 1196→ return;\n 1197→ }\n 1198→ }\n 1199→\n 1200→ const itemDuration = copiedItem.duration;\n 1201→\n 1202→ // Try to find a valid position starting from playhead\n 1203→ const pastePosition = this.findPastePosition(\n 1204→ playheadTime,\n 1205→ itemDuration,\n 1206→ targetTrack.items,\n 1207→ totalDuration\n 1208→ );\n 1209→\n 1210→ if (pastePosition === null) {\n 1211→ this.notificationsComponent?.showNotification(\n 1212→ 'No space available to paste media on this track.',\n 1213→ 'warning'\n 1214→ );\n 1215→ return;\n 1216→ }\n 1217→\n 1218→ // Create a new item with a new ID\n 1219→ const newItem: MediaItem = {\n 1220→ ...copiedItem,\n 1221→ id: `item-${Date.now()}`,\n 1222→ startTime: pastePosition,\n 1223→ trackId: targetTrack.id\n 1224→ };\n 1225→\n 1226→ // Add the new item to the track\n 1227→ this.state.update(s => ({\n 1228→ ...s,\n 1229→ tracks: s.tracks.map(t =>\n 1230→ t.id === targetTrack!.id\n 1231→ ? { ...t, items: [...t.items, newItem] }\n 1232→ : t\n 1233→ )\n 1234→ }));\n 1235→\n 1236→ this.notificationsComponent?.showNotification(\n 1237→ 'Media pasted successfully.',\n 1238→ 'success'\n 1239→ );\n 1240→ }\n 1241→\n 1242→ /**\n 1243→ * Find a valid position to paste media item.\n 1244→ * First tries at the playhead position, then finds the next available gap.\n 1245→ */\n 1246→ private findPastePosition(\n 1247→ preferredPosition: number,\n 1248→ duration: number,\n 1249→ existingItems: MediaItem[],\n 1250→ totalDuration: number\n 1251→ ): number | null {\n 1252→ // Check if we can fit at the preferred position (playhead)\n 1253→ if (this.canFitAtPosition(preferredPosition, duration, existingItems, totalDuration)) {\n 1254→ return preferredPosition;\n 1255→ }\n 1256→\n 1257→ // Sort existing items by start time\n 1258→ const sortedItems = [...existingItems].sort((a, b) => a.startTime - b.startTime);\n 1259→\n 1260→ // Find all gaps on the track and try to place the item\n 1261→ const gaps = this.dragDropService.findAllGaps(sortedItems);\n 1262→\n 1263→ // First, try to find a gap that starts at or after the playhead\n 1264→ for (const gap of gaps) {\n 1265→ // Calculate actual gap size (considering totalDuration for infinite gaps)\n 1266→ const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n 1267→ const gapSize = effectiveGapEnd - gap.gapStart;\n 1268→\n 1269→ if (gap.gapStart >= preferredPosition && gapSize >= duration) {\n 1270→ return gap.gapStart;\n 1271→ }\n 1272→ }\n 1273→\n 1274→ // If no gap after playhead, try any gap that can fit the item\n 1275→ for (const gap of gaps) {\n 1276→ // Calculate actual gap size (considering totalDuration for infinite gaps)\n 1277→ const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n 1278→ const gapSize = effectiveGapEnd - gap.gapStart;\n 1279→\n 1280→ if (gapSize >= duration) {\n 1281→ return gap.gapStart;\n 1282→ }\n 1283→ }\n 1284→\n 1285→ // No suitable position found\n 1286→ return null;\n 1287→ }\n 1288→\n 1289→ /**\n 1290→ * Check if an item can fit at a specific position without overlapping.\n 1291→ */\n 1292→ private canFitAtPosition(\n 1293→ position: number,\n 1294→ duration: number,\n 1295→ existingItems: MediaItem[],\n 1296→ totalDuration: number\n 1297→ ): boolean {\n 1298→ // Check bounds\n 1299→ if (position < 0 || position + duration > totalDuration) {\n 1300→ return false;\n 1301→ }\n 1302→\n 1303→ // Check for overlaps with existing items\n 1304→ const endPosition = position + duration;\n 1305→ for (const item of existingItems) {\n 1306→ const itemEnd = item.startTime + item.duration;\n 1307→ // Check if there's an overlap\n 1308→ if (position < itemEnd && endPosition > item.startTime) {\n 1309→ return false;\n 1310→ }\n 1311→ }\n 1312→\n 1313→ return true;\n 1314→ }\n 1315→}\n 1316→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"parent_tool_use_id":"toolu_01425HweE7Hcod1btvhp65G7","session_id":"c3de30fe-a5bd-49e6-8052-bb51f10fe87f","uuid":"4b1f780f-a171-475d-864f-eff1853c01d7","tool_use_result":{"type":"text","file":{"filePath":"/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts","content":"import { Component, signal, computed, ViewChild, ElementRef, AfterViewInit, OnDestroy, effect } from '@angular/core';\nimport { CommonModule } from '@angular/common';\nimport { MediaType, MediaItem, Track, TimelineState } from '../../models/timeline.models';\nimport { MediaLibraryComponent, MediaLibraryItem } from '../media-library/media-library.component';\nimport { Media***********onent } from '../media-toolbar/media-toolbar.component';\nimport { Notif************onent } from '../notifications/notifications.component';\nimport { Timel*************rvice } from '../../services/timeline-drag-drop.service';\nimport { PlaybackService } from '../../services/playback.service';\nimport { Timel************rvice } from '../../services/timeline-storage.service';\n\n@Component({\n selector: 'app-timeline',\n standalone: true,\n imports: [CommonModule, MediaLibraryComponent, MediaToolbarComponent, NotificationsComponent],\n templateUrl: './timeline.component.html',\n styleUrl: './timeline.component.css'\n})\nexport class TimelineComponent implements AfterViewInit, OnDestroy {\n // Zoom levels: pixels per second\n private readonly MIN_ZOOM = 10;\n private readonly MAX_ZOOM = 200;\n private readonly ZOOM_STEP = 20;\n readonly TRACK_HEADER_WIDTH = 150; // Width of track header in pixels\n private readonly SNAP_PROXIMITY_MS = 500; // Snap to item if playhead is within 500ms\n private readonly MIN_ITEM_DURATION = 100; // Minimum item duration in milliseconds\n\n // Canvas dimensions for preview\n readonly PREVIEW_WIDTH = 640;\n readonly PREVIEW_HEIGHT = 360;\n\n // View references\n @ViewChild('timelineRuler') timelineRuler?: ElementRef<HTMLElement>;\n @ViewChild('notifications') notificationsComponent?: NotificationsComponent;\n @ViewChild('previewCanvas') previewCanvas?: ElementRef<HTMLCanvasElement>;\n\n // Timeline state\n readonly state = signal<TimelineState>({\n tracks: [\n { id: '1', name: 'Track 1', order: 0, items: [] },\n { id: '2', name: 'Track 2', order: 1, items: [] }\n ],\n playheadPosition: 0,\n zoomLevel: 50, // pixels per second\n totalDuration: 120000, // 120 seconds in milliseconds\n selectedItemId: null\n });\n\n // Computed values\n readonly pixel**********econd = computed(() => {\n return this.state().zoomLevel / 1000;\n });\n\n readonly timelineWidth = computed(() => {\n const state = this.state();\n // Calculate the maximum end time across all tracks\n let maxEndTime = state.totalDuration;\n\n for (const track of state.tracks) {\n for (const item of track.items) {\n const itemEndTime = item.startTime + item.duration;\n if (itemEndTime > maxEndTime) {\n maxEndTime = itemEndTime;\n }\n }\n }\n\n return maxEndTime * this.pixelsPerMillisecond();\n });\n\n readonly timelineLineHeight = computed(() => {\n const state = this.state();\n return state.tracks.length * 60 + 32;\n });\n\n readonly playheadPosition = computed(() => {\n return this.state().playheadPosition * this.pixelsPerMillisecond();\n });\n\n readonly playh************ition = computed(() => {\n return this.playheadPosition() + this.TRACK_HEADER_WIDTH;\n });\n\n // Computed: whether a media item is currently selected\n readonly hasSelectedItem = computed(() => {\n return this.state().selectedItemId !== null;\n });\n\n // Dragging state\n private draggedItem: MediaItem | null = null;\n private draggedItemOriginalTrackId: string | null = null;\n private dragOffsetTime: number = 0; // Offset in milliseconds from item start to cursor position\n private isDraggingPlayhead = false;\n private isDraggingFromRuler = false;\n private resizingItem: { item: MediaItem; edge: 'left' | 'right' } | null = null;\n private mouseDownPosition: { x: number; y: number } | null = null; // Track mouse down position for click detection\n\n // Video preview state\n readonly isPlaying = signal<boolean>(false);\n\n // Duration editor state\n readonly showDurationEditor = signal<boolean>(false);\n private editedDuration: number = 120; // Duration in seconds\n\n // Media library state\n readonly showMediaLibrary = signal<boolean>(false);\n private mediaLibraryTargetTrackId: string | null = null;\n\n // Clipboard state for copy/paste functionality\n private readonly clipboardItem = signal<MediaItem | null>(null);\n private readonly clipb************ackId = signal<string | null>(null);\n\n // Computed: whether a media item is in clipboard\n readonly hasClipboardItem = computed(() => {\n return this.clipboardItem() !== null;\n });\n\n // Render loop ID for cleanup\n private renderLoopId: number | null = null;\n\n constructor(\n private dragDropService: TimelineDragDropService,\n public playbackService: PlaybackService,\n private storageService: TimelineStorageService\n ) {\n // Load saved state from LocalStorage on initialization\n const savedState = this.storageService.loadState();\n if (savedState) {\n this.state.set(savedState);\n }\n\n // Effect to sync playhead position from PlaybackService during playback\n effect(() => {\n if (this.playbackService.isPlaying()) {\n const position = this.playbackService.playheadPosition();\n this.state.update(s => ({\n ...s,\n playheadPosition: position\n }));\n }\n });\n\n // Effect to auto-save timeline state to LocalStorage on any change\n effect(() => {\n const currentState = this.state();\n this.storageService.saveState(currentState);\n });\n }\n\n ngAfterViewInit(): void {\n // Initialize canvas for preview rendering\n if (this.previewCanvas) {\n this.playbackService.setCanvas(this.previewCanvas.nativeElement);\n }\n\n // Start continuous render loop for preview (renders current frame even when paused)\n this.startRenderLoop();\n\n // Synchronize media and render initial frame if state was loaded from LocalStorage\n const currentState = this.state();\n if (currentState.tracks.length > 0) {\n this.playbackService.seek(currentState.tracks, currentState.playheadPosition);\n }\n }\n\n ngOnDestroy(): void {\n // Clean up render loop\n if (this.renderLoopId !== null) {\n cancelAnimationFrame(this.renderLoopId);\n this.renderLoopId = null;\n }\n\n // Stop playback\n this.playbackService.stop();\n }\n\n /**\n * Continuous render loop for preview canvas.\n * Keeps rendering even when paused so seeking updates the preview.\n */\n private startRenderLoop(): void {\n const render = () => {\n // Only render if we have active media and are not playing\n // (PlaybackService handles rendering during playback)\n if (!this.playbackService.isPlaying()) {\n this.playbackService.renderCurrentFrame();\n }\n this.renderLoopId = requestAnimationFrame(render);\n };\n this.renderLoopId = requestAnimationFrame(render);\n }\n\n // Track management\n addTrack(): void {\n const currentState = this.state();\n const newTrack: Track = {\n id: `track-${Date.now()}`,\n name: `Track ${currentState.tracks.length + 1}`,\n order: currentState.tracks.length,\n items: []\n };\n\n this.state.update(s => ({\n ...s,\n tracks: [...s.tracks, newTrack]\n }));\n\n // Show notification for adding track\n this.notificationsComponent?.showNotification(\n `Track \"${newTrack.name}\" added.`,\n 'success'\n );\n }\n\n removeTrack(trackId: string): void {\n const currentState = this.state();\n if (currentState.tracks.length <= 1) {\n return; // Keep at least one track\n }\n\n // Get track name before removing\n const trackToRemove = currentState.tracks.find(t => t.id === trackId);\n const trackName = trackToRemove?.name || 'Track';\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.filter(t => t.id !== trackId)\n }));\n\n // Show notification for removing track\n this.notificationsComponent?.showNotification(\n `Track \"${trackName}\" removed.`,\n 'info'\n );\n }\n\n // Zoom controls\n zoomIn(): void {\n this.state.update(s => ({\n ...s,\n zoomLevel: Math.min(s.zoomLevel + this.ZOOM_STEP, this.MAX_ZOOM)\n }));\n }\n\n zoomOut(): void {\n this.state.update(s => ({\n ...s,\n zoomLevel: Math.max(s.zoomLevel - this.ZOOM_STEP, this.MIN_ZOOM)\n }));\n }\n\n // Utility method to extract coordinates from mouse or touch events\n private getEventCoordinates(event: MouseEvent | TouchEvent): { clientX: number; clientY: number } {\n if (event instanceof MouseEvent) {\n return { clientX: event.clientX, clientY: event.clientY };\n } else {\n const touch = event.touches[0] || event.changedTouches[0];\n return { clientX: touch.clientX, clientY: touch.clientY };\n }\n }\n\n // Playhead controls\n onRulerPointerDown(event: MouseEvent | TouchEvent): void {\n event.preventDefault();\n this.isDraggingFromRuler = true;\n\n // Immediately update position on pointer down\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n const coords = this.getEventCoordinates(event);\n // Calculate position within the ruler element\n // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n const x = coords.clientX - rect.left;\n const newPosition = x / this.pixelsPerMillisecond();\n const currentState = this.state();\n const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n\n this.state.update(s => ({\n ...s,\n playheadPosition: clampedPosition\n }));\n\n // Sync position to playback service for seeking\n this.playbackService.seek(currentState.tracks, clampedPosition);\n }\n\n onPlayheadPointerDown(event: MouseEvent | TouchEvent): void {\n event.preventDefault();\n event.stopPropagation();\n this.isDraggingPlayhead = true;\n }\n\n\n // Media item drag and drop\n onMediaItemPointerDown(event: MouseEvent | TouchEvent, item: MediaItem, track: Track): void {\n const target = event.target as HTMLElement;\n\n // Check if clicking/touching on resize handle\n if (target.classList.contains('resize-handle')) {\n this.resizingItem = {\n item,\n edge: target.classList.contains('resize-handle-left') ? 'left' : 'right'\n };\n event.preventDefault();\n return;\n }\n\n c
[2025-12-22T21:45:15.350Z] [INFO] onst coords = this.getEventCoordinates(event);\n this.mouseDownPosition = { x: coords.clientX, y: coords.clientY };\n\n const mediaItemElement = event.currentTarget as HTMLElement;\n const rect = mediaItemElement.getBoundingClientRect();\n const clickX = coords.clientX - rect.left;\n\n // Convert pixel offset to time offset\n this.dragOffsetTime = clickX / this.pixelsPerMillisecond();\n\n this.draggedItem = item;\n this.draggedItemOriginalTrackId = track.id;\n event.preventDefault();\n }\n\n onTrackPointerDown(event: MouseEvent | TouchEvent): void {\n // Deselect when clicking/touching track background (not on media item)\n const target = event.target as HTMLElement;\n if (target.classList.contains('track')) {\n this.deselectMediaItem();\n }\n }\n\n onTrackPointerMove(event: MouseEvent | TouchEvent, track: Track): void {\n if (this.resizingItem) {\n this.handleResize(event, track);\n return;\n }\n event.preventDefault();\n event.stopPropagation();\n\n if (!this.draggedItem) return;\n\n const coords = this.getEventCoordinates(event);\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n const x = coords.clientX - rect.left;\n const requestedStartTime = Math.max(0, x / this.pixelsPerMillisecond() - this.dragOffsetTime);\n\n this.state.update(s => {\n const updatedTracks = s.tracks.map(t => {\n if (t.id === track.id) {\n // Get all items except the dragged one for collision detection\n const otherItems = t.items.filter(i => i.id !== this.draggedItem!.id);\n\n // Fix for issue #81: Find snap targets (playhead and items on all tracks)\n const snapTargets = this.dragDropService.findSnapTargets(\n this.draggedItem!.id,\n s.tracks,\n s.playheadPosition\n );\n\n // Calculate valid position and duration considering collisions, gap fitting, and snapping\n const validPosition = this.dragDropService.getValidDragPosition(\n this.draggedItem!,\n requestedStartTime,\n otherItems,\n s.totalDuration,\n snapTargets\n );\n\n // Check if item already exists in this track\n const itemExists = t.items.some(i => i.id === this.draggedItem!.id);\n\n if (itemExists) {\n // Update position and duration in current track\n return {\n ...t,\n items: t.items.map(i =>\n i.id === this.draggedItem!.id\n ? {\n ...i,\n startTime: validPosition.startTime,\n duration: validPosition.duration,\n trackId: track.id\n }\n : i\n )\n };\n } else {\n // Add to new track with adjusted position and duration\n return {\n ...t,\n items: [\n ...otherItems,\n {\n ...this.draggedItem!,\n startTime: validPosition.startTime,\n duration: validPosition.duration,\n trackId: track.id\n }\n ]\n };\n }\n } else if (t.id === this.draggedItemOriginalTrackId && t.id !== track.id) {\n // Remove from original track only if moving to different track\n return {\n ...t,\n items: t.items.filter(i => i.id !== this.draggedItem!.id)\n };\n }\n return t;\n });\n\n // Update the original track ID to current track for smooth dragging within same track\n this.draggedItemOriginalTrackId = track.id;\n\n return { ...s, tracks: updatedTracks };\n });\n }\n\n private handleResize(event: MouseEvent | TouchEvent, track: Track): void {\n if (!this.resizingItem) return;\n\n const coords = this.getEventCoordinates(event);\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n // Fix for issue #83: getBoundingClientRect() returns viewport-relative coordinates,\n // and coords.clientX is also viewport-relative, so we don't need to add scrollLeft\n const x = coords.clientX - rect.left;\n const timeAtCursor = x / this.pixelsPerMillisecond();\n\n this.state.update(s => {\n // Fix for issue #87: Find snap targets for resize operations\n const snapTargets = this.dragDropService.findSnapTargets(\n this.resizingItem!.item.id,\n s.tracks,\n s.playheadPosition\n );\n\n const updatedTracks = s.tracks.map(t => {\n if (t.id === track.id) {\n // Get resize bounds considering adjacent items\n const bounds = this.dragDropService.getResizeBounds(\n this.resizingItem!.item,\n t.items,\n this.resizingItem!.edge,\n s.totalDuration\n );\n\n return {\n ...t,\n items: t.items.map(i => {\n if (i.id === this.resizingItem!.item.id) {\n if (this.resizingItem!.edge === 'left') {\n // Fix for issue #89: Handle mediaStartTime when resizing from left\n // Apply snapping to left edge (start time)\n let newStartTime = Math.max(\n bounds.minTime,\n Math.min(timeAtCursor, bounds.maxTime)\n );\n\n // Apply snapping if within snap distance\n let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n for (const target of snapTargets) {\n const distance = Math.abs(newStartTime - target);\n if (distance < minDistance) {\n minDistance = distance;\n // Only snap if within bounds\n if (target >= bounds.minTime && target <= bounds.maxTime) {\n newStartTime = target;\n }\n }\n }\n\n // Calculate how much the timeline position is changing\n const deltaTime = newStartTime - i.startTime;\n const newDuration = i.duration - deltaTime;\n\n // Update media start time (trimming from source media)\n const curre***********tTime = i.mediaStartTime || 0;\n const newMediaStartTime = curre***********tTime + deltaTime;\n\n // Check if we're trying to extend beyond the start of source media\n if (newMediaStartTime < 0) {\n // Can only extend left by curre***********tTime amount\n const maxExtension = currentMediaStartTime;\n const finalStartTime = i.startTime - maxExtension;\n const finalDuration = i.duration + maxExtension;\n\n // Ensure we don't exceed maxDuration\n if (i.maxDuration && finalDuration > i.maxDuration) {\n return {\n ...i,\n startTime: finalStartTime + (finalDuration - i.maxDuration),\n duration: i.maxDuration,\n mediaStartTime: 0\n };\n }\n\n return {\n ...i,\n startTime: finalStartTime,\n duration: finalDuration,\n mediaStartTime: 0\n };\n }\n\n // Ensure media end doesn't exceed maxDuration\n if (i.maxDuration && newMediaStartTime + newDuration > i.maxDuration) {\n const maxAllowedDuration = i.maxDuration - newMediaStartTime;\n return {\n ...i,\n startTime: i.startTime + (i.duration - maxAllowedDuration),\n duration: maxAllowedDuration,\n mediaStartTime: newMediaStartTime\n };\n }\n\n return {\n ...i,\n startTime: newStartTime,\n duration: newDuration,\n mediaStartTime: newMediaStartTime\n };\n } else {\n // Fix for issue #87: Apply snapping to right edge (end time)\n let newEndTime = Math.max(\n bounds.minTime,\n Math.min(timeAtCursor, bounds.maxTime)\n );\n\n // Apply snapping if within snap distance\n let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n for (const target of snapTargets) {\n const distance = Math.abs(newEndTime - target);\n if (distance < minDistance) {\n minDistance = distance;\n // Only snap if within bounds\n if (target >= bounds.minTime && target <= bounds.maxTime) {\n newEndTime = target;\n }\n }\n }\n\n const newDuration = newEndTime - i.startTime;\n\n // Limit duration by maxDuration if specified\n const limitedDuration = i.maxDuration\n ? Math.min(newDuration, i.maxDuration)\n : newDuration;\n\n return { ...i, duration: limitedDuration };\n }\n }\n return i;\n })\n };\n }\n return t;\n });\n\n return { ...s, tracks: updatedTracks };\n });\n }\n\n onPointerUp(event: MouseEvent | TouchEvent): void {\n // Detect if this was a click/tap (not a drag) on a media item\n if (this.draggedItem && this.mouseDownPosition) {\n const coords = this.getEventCoordinates(event);\n const dx = coords.clientX - this.mouseDownPosition.x;\n const dy = coords.clientY - this.mouseDownPosition.y;\n const distance = Math.sqrt(dx * dx + dy * dy);\n\n // If pointer moved less than 5 pixels, consider it a click/tap\n if (distance < 5) {\n this.selectMediaItem(this.draggedItem.id);\n }\n }\n\n this.draggedItem = null;\n this.draggedItemOriginalTrackId = null;\n this.dragOffsetTime = 0;\n this.isDraggingPlayhead = false;\n this.isDraggingFromRuler = false;\n this.resizingItem = null;\n this.mouseDownPosition = null;\n }\n\n onDocumentPointerMove(event: MouseEvent | TouchEvent): void {\n if (this.isDraggingPlayhead || this.isDraggingFromRuler) {\n // Fix for issue #50: Use ViewChild reference to ensure we use the exact same element as onRulerPointerDown\n if (!this.timelineRuler) {\n return;\n }\n\n const coords = this.getEventCoordinates(event);\n const rulerElement = this.timelineRuler.nativeElement;\n // Use the same calculation as onRulerPointerDown\n // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n const rect = rulerElement.getBoundingClientRect();\n const x = coords.clientX - rect.left;\n const newPosition = x / this.pixelsPerMillisecond();\n const currentState = this.state();\n const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n\n this.state.update(s => ({\n ...s,\n playheadPosition: clampedPosition\n }));\n\n // Sync position to playback service for seeking (but don't call too frequently during drag)\n this.playbackService.seek(currentState.tracks, clampedPosition);\n }\n\n // Fix for issue #96: Handle media item dragging and resizing at document level for touch events\n // This allows dragging between tracks on mobile devices\n if (event instanceof TouchEvent) {\n if (this.draggedItem) {\n // Find which track the touch is currently over\n const targetTrack = this.findTrackAtCoordinates(this.getEventCoordinates(event));\n if (targetTrack) {\n // Reuse existing drag logic\n this.onTrackPointerMove(event, targetTrack);\n }\n } else if (this.resizingItem) {\n // Find the track that contains the resizing item\n const targetTrack = this.findTrackContainingItem(this.resizingItem.item.id);\n if (targetTrack) {\n // Reuse existing resize logic\n this.handleResize(event, targetTrack);\n }\n }\n }\n }\n\n // Helper method to find which track is at the given Y coordinate\n private findTrackAtCoordinates(coords: { clientX: number; clientY: number }): Track | null {\n const trackElements = document.querySelectorAll('.track');\n for (const trackElement of Array.from(trackElements)) {\n const rect = trackElement.getBoundingClientRect();\n if (coords.clientY >= rect.top && coords.clientY <= rect.bottom) {\n const trackIndex = Array.from(trackElements).indexOf(trackElement);\n const tracks = this.state().tracks;\n if (trackIndex >= 0 && trackIndex < tracks.length) {\n return tracks[trackIndex];\n }\n }\n }\n return null;\n }\n\n // Helper method to find the track containing a specific item\n private findTrackContainingItem(itemId: string): Track | null {\n const currentState = this.state();\n for (const track of currentState.tracks) {\n if (track.items.some(item => item.id === itemId)) {\n return track;\n }\n }\n return null;\n }\n\n // Helper methods\n getItemStyle(item: MediaItem) {\n return {\n left: `${item.startTime * this.pixelsPerMillisecond()}px`,\n width: `${item.duration * this.pixelsPerMillisecond()}px`\n };\n }\n\n getMediaTypeClass(type: MediaType): string {\n return `media-${type}`;\n }\n\n formatTime(milliseconds: number): string {\n const seconds = Math.floor(milliseconds / 1000);\n const minutes = Math.floor(seconds / 60);\n const remainingSeconds = seconds % 60;\n const cs = Math.floor((milliseconds % 1000) / 10);\n return `${minutes}:${remainingSeconds.toString().padStart(2, '0')}.${cs.toString().padStart(2, '0')}`;\n }\n\n /**\n * Calculate appropriate time interval for markers based on zoom level\n * to prevent marker labels from overlapping\n */\n private getMarkerInterval(): number {\n // Minimum spacing between markers in pixels to prevent overlap\n // Enough space for \"0:00.000\" text (about 50-60px)\n const MIN_M***********NG_PX = 60;\n\n // Calculate how much time represents MIN_M***********NG_PX at current zoom\n const pixelsPerMs = this.pixelsPerMillisecond();\n const minTimeSpacing = MIN_M***********NG_PX / pixelsPerMs;\n\n // Define possible intervals (in ms): 100ms, 250ms, 500ms, 1s, 2s, 5s, 10s, 30s, 60s\n const intervals = [100, 250, 500, 1000, 2000, 5000, 10000, 30000, 60000];\n\n // Find the smallest interval that's larger than or equal to minTimeSpacing\n for (const interval of intervals) {\n if (interval >= minTimeSpacing) {\n return interval;\n }\n }\n\n // If even 60s is too small, use larger intervals\n return Math.ceil(minTimeSpacing / 60000) * 60000;\n }\n\n getTimeMarkers(): { position: number; label: string }[] {\n const markers: { position: number; label: string }[] = [];\n const stepMs = this.getMarkerInterval(); // Dynamic interval based on zoom level\n\n // Fix for issue #85: Do not show the last time mark at totalDuration\n // to prevent container expansion from the text label\n for (let time = 0; time < this.state().totalDuration; time += stepMs) {\n markers.push({\n position: time * this.pixelsPerMillisecond(),\n label: this.formatTime(time)\n });\n }\n\n return markers;\n }\n\n // Add placeholder media item\n addMediaItem(type: MediaType, trackId: string): void {\n const currentState = this.state();\n const track = currentState.tracks.find(t => t.id === trackId);\n\n if (!track) return;\n\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n const newItemDuration = type === MediaType.IMAGE ? 5000 : 3000;\n\n // Determine the start time for the new item using the service\n const startTime = this.dragDropService.calculateNewItemStartTime(\n playheadTime,\n track.items,\n this.SNAP_PROXIMITY_MS\n );\n\n // Fix for issue #48: Ensure new item doesn't exceed totalDuration\n const maxAllowedDuration = totalDuration - startTime;\n const finalDuration = Math.min(newItemDuration, maxAllowedDuration);\n\n // Fix for issue #64: Verify that the new item doesn't overlap with any existing items\n const testItem: MediaItem = {\n id: 'temp',\n type,\n startTime,\n duration: finalDuration,\n trackId,\n name: '',\n isPlaceholder: true\n };\n\n // Validate and adjust position if needed\n const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n\n // Recalculate duration limit if position was adjusted\n const adjus****************ation = totalDuration - validatedStartTime;\n const adjustedDuration = Math.min(newItemDuration, adjustedMaxAllowedDuration);\n\n // Create the final non-overlapping item\n const newItem: MediaItem = {\n id: `item-${Date.now()}`,\n type,\n startTime: validatedStartTime,\n duration: adjustedDuration,\n trackId,\n name: `${type} placeholder`,\n isPlaceholder: true\n };\n\n // Set maxDuration for audio and video placeholders\n if (type === MediaType.VIDEO) {\n newItem.maxDuration = Math.min(10000, adjustedMaxAllowedDuration); 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Timeline cleared.',\n 'success'\n );\n }\n\n // Video preview controls\n togglePlayback(): void {\n const currentState = this.state();\n\n if (this.playbackService.isPlaying()) {\n this.playbackService.pause();\n this.isPlaying.set(false);\n } else {\n // Sync playhead position to PlaybackService before starting\n this.playbackService.setPlayheadPosition(currentState.playheadPosition);\n this.playbackService.play(currentState.tracks, currentState.totalDuration);\n this.isPlaying.set(true);\n }\n }\n\n skipBackward(): void {\n const currentState = this.state();\n const newPosition = Math.max(0, currentState.playheadPosition - 5000);\n\n this.state.update(s => ({\n ...s,\n playheadPosition: newPosition\n }));\n\n // Sync position and update media\n this.playbackService.seek(currentState.tracks, newPosition);\n }\n\n skipForward(): void {\n const currentState = this.state();\n const newPosition = Math.min(currentState.totalDuration, currentState.playheadPosition + 5000);\n\n this.state.update(s => ({\n ...s,\n playheadPosition: newPosition\n }));\n\n // Sync position and update media\n this.playbackService.seek(currentState.tracks, newPosition);\n }\n\n // Duration editor methods\n openDurationEditor(): void {\n this.editedDuration = this.state().totalDuration / 1000;\n this.showDurationEditor.set(true);\n }\n\n closeDurationEditor(): void {\n this.showDurationEditor.set(false);\n }\n\n onDurationInputChange(event: Event): void {\n const input = event.target as HTMLInputElement;\n const value = parseFloat(input.value);\n if (!isNaN(value) && value > 0) {\n this.editedDuration = value;\n }\n }\n\n saveDuration(): void {\n const newDurationMs = Math.max(1000, this.editedDuration * 1000); // At least 1 second\n this.state.update(s => ({\n ...s,\n totalDuration: newDurationMs,\n // Ensure playhead doesn't exceed new duration\n playheadPosition: Math.min(s.playheadPosition, newDurationMs)\n }));\n this.closeDurationEditor();\n }\n\n // Media library methods\n openMediaLibrary(trackId: string): void {\n this.mediaLibraryTargetTrackId = trackId;\n this.showMediaLibrary.set(true);\n }\n\n closeMediaLibrary(): void {\n this.showMediaLibrary.set(false);\n this.mediaLibraryTargetTrackId = null;\n }\n\n onMediaSelected(media: MediaLibraryItem): void {\n if (!this.mediaLibraryTargetTrackId) return;\n\n const currentState = this.state();\n const track = currentState.tracks.find(t => t.id === this.mediaLibraryTargetTrackId);\n\n if (!track) return;\n\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n\n // Determine the start time for the new item using the service\n const startTime = this.dragDropService.calculateNewItemStartTime(\n playheadTime,\n track.items,\n this.SNAP_PROXIMITY_MS\n );\n\n // Ensure item doesn't exceed totalDuration\n const maxAllowedDuration = totalDuration - startTime;\n const finalDuration = Math.min(media.duration, maxAllowedDuration);\n\n // Verify that the new item doesn't overlap with any existing items\n const testItem: MediaItem = {\n id: 'temp',\n type: media.type,\n startTime,\n duration: finalDuration,\n trackId: this.mediaLibraryTargetTrackId,\n name: '',\n isPlaceholder: false\n };\n\n // Validate and adjust position if needed\n const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n\n // Recalculate duration limit if position was adjusted\n const adjus****************ation = totalDuration - validatedStartTime;\n const adjustedDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n\n // Create the final non-overlapping item\n const newItem: MediaItem = {\n id: `item-${Date.now()}`,\n type: media.type,\n startTime: validatedStartTime,\n duration: adjustedDuration,\n trackId: this.mediaLibraryTargetTrackId,\n name: media.name,\n url: media.url, // Pass URL from media library for playback\n isPlaceholder: false\n };\n\n // Set maxDuration for audio and video\n if (media.type === MediaType.VIDEO) {\n newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n } else if (media.type === MediaType.AUDIO) {\n newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n }\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === this.mediaLibraryTargetTrackId\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n // Show notification for adding media\n this.notificationsComponent?.showNotification(\n `\"${media.name}\" added to timeline.`,\n 'success'\n );\n\n // Close the media library after selection\n this.closeMediaLibrary();\n }\n\n /**\n * Trim (split) the selected media item at the playhead position.\n * Creates two separate items from the original media.\n */\n trimSelectedMedia(): void {\n const currentState = this.state();\n const selectedItemId = currentState.selectedItemId;\n\n if (!selectedItemId) {\n return;\n }\n\n // Find the selected item and its track\n let selectedItem: MediaItem | null = null;\n let selectedTrack: Track | null = null;\n\n for (const track of currentState.tracks) {\n const item = track.items.find(i => i.id === selectedItemId);\n if (item) {\n selectedItem = item;\n selectedTrack = track;\n break;\n }\n }\n\n if (!selectedItem || !selectedTrack) {\n return;\n }\n\n const playheadTime = currentState.playheadPosition;\n const itemStart = selectedItem.startTime;\n const itemEnd = itemStart + selectedItem.duration;\n\n // Check if playhead is within the selected media item\n if (playheadTime <= itemStart || playheadTime >= itemEnd) {\n // Playhead is not within the selected media - 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b.startTime);\n\n // Find all gaps on the track and try to place the item\n const gaps = this.dragDropService.findAllGaps(sortedItems);\n\n // First, try to find a gap that starts at or after the playhead\n for (const gap of gaps) {\n // Calculate actual gap size (considering totalDuration for infinite gaps)\n const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n const gapSize = effectiveGapEnd - gap.gapStart;\n\n if (gap.gapStart >= preferredPosition && gapSize >= duration) {\n return gap.gapStart;\n }\n }\n\n // If no gap after playhead, try any gap that can fit the item\n for (const gap of gaps) {\n // Calculate actual gap size (considering totalDuration for infinite gaps)\n const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n const gapSize = effectiveGapEnd - gap.gapStart;\n\n if (gapSize >= duration) {\n return gap.gapStart;\n }\n }\n\n // No suitable position found\n return null;\n }\n\n /**\n * Check if an item can fit at a specific position without overlapping.\n */\n private canFitAtPosition(\n position: number,\n duration: number,\n existingItems: MediaItem[],\n totalDuration: number\n ): boolean {\n // Check bounds\n if (position < 0 || position + duration > totalDuration) {\n return false;\n }\n\n // Check for overlaps with existing items\n const endPosition = position + duration;\n for (const item of existingItems) {\n const itemEnd = item.startTime + item.duration;\n // Check if there's an overlap\n if (position < itemEnd && endPosition > item.startTime) {\n return false;\n }\n }\n\n return true;\n }\n}\n","numLines":1316,"startLine":1,"totalLines":1316}}}
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"content": " 1→import { Component, input, output } from '@angular/core';\n 2→import { CommonModule } from '@angular/common';\n 3→\n 4→@Component({\n 5→ selector: 'app-media-toolbar',\n 6→ standalone: true,\n 7→ imports: [CommonModule],\n 8→ templateUrl: './media-toolbar.component.html',\n 9→ styleUrl: './media-toolbar.component.css'\n 10→})\n 11→export class Media***********onent {\n 12→ // Input: whether a media item is selected\n 13→ readonly isVisible = input<boolean>(false);\n 14→\n 15→ // Input: whether a media item is in clipboard (for paste button visibility)\n 16→ readonly hasClipboard = input<boolean>(false);\n 17→\n 18→ // Output events for toolbar actions\n 19→ readonly trimMedia = output<void>();\n 20→ readonly copyMedia = output<void>();\n 21→ readonly pasteMedia = output<void>();\n 22→\n 23→ onTrimClick(): void {\n 24→ this.trimMedia.emit();\n 25→ }\n 26→\n 27→ onCopyClick(): void {\n 28→ this.copyMedia.emit();\n 29→ }\n 30→\n 31→ onPasteClick(): void {\n 32→ this.pasteMedia.emit();\n 33→ }\n 34→}\n 35→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"
}
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"content": "import { Component, input, output } from '@angular/core';\nimport { CommonModule } from '@angular/common';\n\n@Component({\n selector: 'app-media-toolbar',\n standalone: true,\n imports: [CommonModule],\n templateUrl: './media-toolbar.component.html',\n styleUrl: './media-toolbar.component.css'\n})\nexport class Media***********onent {\n // Input: whether a media item is selected\n readonly isVisible = input<boolean>(false);\n\n // Input: whether a media item is in clipboard (for paste button visibility)\n readonly hasClipboard = input<boolean>(false);\n\n // Output events for toolbar actions\n readonly trimMedia = output<void>();\n readonly copyMedia = output<void>();\n readonly pasteMedia = output<void>();\n\n onTrimClick(): void {\n this.trimMedia.emit();\n }\n\n onCopyClick(): void {\n this.copyMedia.emit();\n }\n\n onPasteClick(): void {\n this.pasteMedia.emit();\n }\n}\n",
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[2025-12-22T21:45:18.383Z] [INFO] {
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{
"tool_use_id": "toolu_01UQT5mjG3bf4mvuc9V6h4tA",
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"content": " 1→@if (isVisible() || hasClipboard()) {\n 2→ <div class=\"media-toolbar\">\n 3→ @if (isVisible()) {\n 4→ <button\n 5→ class=\"toolbar-button\"\n 6→ (click)=\"onCopyClick()\"\n 7→ title=\"Copy media\">\n 8→ <i class=\"bi bi-clipboard\"></i>\n 9→ </button>\n 10→ <button\n 11→ class=\"toolbar-button\"\n 12→ (click)=\"onTrimClick()\"\n 13→ title=\"Trim media\">\n 14→ <i class=\"bi bi-scissors\"></i>\n 15→ </button>\n 16→ }\n 17→ @if (hasClipboard()) {\n 18→ <button\n 19→ class=\"toolbar-button\"\n 20→ (click)=\"onPasteClick()\"\n 21→ title=\"Paste media\">\n 22→ <i class=\"bi bi-clipboard-check\"></i>\n 23→ </button>\n 24→ }\n 25→ </div>\n 26→}\n 27→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"
}
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"content": "@if (isVisible() || hasClipboard()) {\n <div class=\"media-toolbar\">\n @if (isVisible()) {\n <button\n class=\"toolbar-button\"\n (click)=\"onCopyClick()\"\n title=\"Copy media\">\n <i class=\"bi bi-clipboard\"></i>\n </button>\n <button\n class=\"toolbar-button\"\n (click)=\"onTrimClick()\"\n title=\"Trim media\">\n <i class=\"bi bi-scissors\"></i>\n </button>\n }\n @if (hasClipboard()) {\n <button\n class=\"toolbar-button\"\n (click)=\"onPasteClick()\"\n title=\"Paste media\">\n <i class=\"bi bi-clipboard-check\"></i>\n </button>\n }\n </div>\n}\n",
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[2025-12-22T21:45:18.407Z] [INFO] {
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{
"tool_use_id": "toolu_014rYc61Z1LcUSi1tUkAM6ng",
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"content": " 1→<div class=\"flex flex-col h-full bg-[#1e1e1e] text-gray-200 select-none\" (mouseup)=\"onPointerUp($event)\" (mousemove)=\"onDocumentPointerMove($event)\" (touchend)=\"onPointerUp($event)\" (touchmove)=\"onDocumentPointerMove($event)\">\n 2→ <!-- Toolbar -->\n 3→ <div class=\"flex justify-between items-center px-4 py-3 bg-[#252525] border-b border-[#3a3a3a]\">\n 4→ <h2 class=\"text-lg font-semibold m-0\">VideoEditor</h2>\n 5→ <div class=\"flex gap-4 items-center\">\n 6→ <button\n 7→ (click)=\"newProject()\"\n 8→ class=\"px-3 py-1.5 bg-[#3a3a3a] text-white border-none rounded cursor-pointer text-sm transition-colors hover:bg-[#4a4a4a] flex items-center gap-2\"\n 9→ title=\"Create new project (clears timeline and saved data)\">\n 10→ <i class=\"bi bi-file-earmark-plus\"></i>\n 11→ <span>New project</span>\n 12→ </button>\n 13→ <div class=\"font-mono text-sm px-3 py-1 bg-[#2a2a2a] rounded cursor-pointer hover:bg-[#3a3a3a] transition-colors\"\n 14→ (click)=\"openDurationEditor()\"\n 15→ title=\"Click to change total duration\">\n 16→ {{ formatTime(state().playheadPosition) }} / {{ formatTime(state().totalDuration) }}\n 17→ </div>\n 18→ </div>\n 19→ </div>\n 20→\n 21→ <!-- Video Preview Area -->\n 22→ <div class=\"flex justify-center items-center py-6 bg-[#252525] border-b border-[#3a3a3a]\">\n 23→ <div class=\"flex flex-col items-center gap-3\">\n 24→ <!-- Video Preview Canvas -->\n 25→ <div class=\"w-[640px] h-[360px] bg-[#1a1a1a] rounded-lg border border-[#3a3a3a] flex items-center justify-center overflow-hidden\">\n 26→ <canvas #previewCanvas\n 27→ [width]=\"PREVIEW_WIDTH\"\n 28→ [height]=\"PREVIEW_HEIGHT\"\n 29→ class=\"w-full h-full\">\n 30→ </canvas>\n 31→ </div>\n 32→\n 33→ <!-- Playback Controls -->\n 34→ <div class=\"flex gap-2 items-center\">\n 35→ <button (click)=\"skipBackward()\" class=\"px-3 py-2 bg-[#3a3a3a] text-white border-none rounded cursor-pointer text-base transition-colors hover:bg-[#4a4a4a] flex items-center gap-1.5\" title=\"Back 5 seconds\">\n 36→ <i class=\"bi bi-skip-backward-fill\"></i>\n 37→ <span class=\"text-xs\">5s</span>\n 38→ </button>\n 39→ <button (click)=\"togglePlayback()\" class=\"px-4 py-2 bg-blue-600 text-white border-none rounded cursor-pointer text-xl transition-colors hover:bg-blue-700\" [title]=\"isPlaying() ? 'Pause' : 'Play'\">\n 40→ @if (isPlaying()) {\n 41→ <i class=\"bi bi-pause-fill\"></i>\n 42→ } @else {\n 43→ <i class=\"bi bi-play-fill\"></i>\n 44→ }\n 45→ </button>\n 46→ <button (click)=\"skipForward()\" class=\"px-3 py-2 bg-[#3a3a3a] text-white border-none rounded cursor-pointer text-base transition-colors hover:bg-[#4a4a4a] flex items-center gap-1.5\" title=\"Forward 5 seconds\">\n 47→ <span class=\"text-xs\">5s</span>\n 48→ <i class=\"bi bi-skip-forward-fill\"></i>\n 49→ </button>\n 50→ </div>\n 51→ </div>\n 52→ </div>\n 53→\n 54→ <div class=\"relative\">\n 55→ <!-- Media Toolbar (positioned absolutely above timeline, aligned with left panel) -->\n 56→ <app-media-toolbar\n 57→ [isVisible]=\"hasSelectedItem()\"\n 58→ [hasClipboard]=\"hasClipboardItem()\"\n 59→ (trimMedia)=\"trimSelectedMedia()\"\n 60→ (copyMedia)=\"copySelectedMedia()\"\n 61→ (pasteMedia)=\"pasteMedia()\">\n 62→ </app-media-toolbar>\n 63→ </div>\n 64→ <!-- Timeline content wrapper with unified horizontal scrolling -->\n 65→ <div class=\"flex-1 flex flex-col overflow-y-auto overflow-x-auto relative\">\n 66→ <!-- Timeline Ruler (sticky to stay visible during vertical scroll) -->\n 67→ <div class=\"flex border-b border-[#3a3a3a] flex-shrink-0 sticky top-0 z-10 bg-[#2a2a2a] relative\">\n 68→ <!-- Control area to align with track headers -->\n 69→ <div class=\"min-w-[150px] bg-[#252525] border-r border-[#3a3a3a] flex justify-center items-center gap-1 p-2\">\n 70→ <button (click)=\"addTrack()\" class=\"px-2 py-1 text-white border-none rounded cursor-pointer text-sm opacity-70 transition-opacity hover:opacity-100\" title=\"Add track\">\n 71→ <i class=\"bi bi-plus-circle\"></i>\n 72→ </button>\n 73→ <button (click)=\"zoomOut()\" class=\"px-2 py-1 text-white border-none rounded cursor-pointer text-sm opacity-70 transition-opacity hover:opacity-100\" title=\"Zoom out\">\n 74→ <i class=\"bi bi-zoom-out\"></i>\n 75→ </button>\n 76→ <button (click)=\"zoomIn()\" class=\"px-2 py-1 text-white border-none rounded cursor-pointer text-sm opacity-70 transition-opacity hover:opacity-100\" title=\"Zoom in\">\n 77→ <i class=\"bi bi-zoom-in\"></i>\n 78→ </button>\n 79→ </div>\n 80→ <!-- Ruler content -->\n 81→ <div class=\"relative h-10 bg-[#2a2a2a] flex-1\">\n 82→ <div class=\"relative h-full min-w-full cursor-pointer\"\n 83→ [style.width.px]=\"timelineWidth()\"\n 84→ (mousedown)=\"onRulerPointerDown($event)\"\n 85→ (touchstart)=\"onRulerPointerDown($event)\"\n 86→ #timelineRuler>\n 87→ @for (marker of getTimeMarkers(); track marker.position) {\n 88→ <div class=\"absolute top-0 h-full\" [style.left.px]=\"marker.position\">\n 89→ <div class=\"w-px h-[60%] bg-[#4a4a4a]\"></div>\n 90→ <div class=\"text-[10px] text-gray-400 mt-0.5 whitespace-nowrap\">{{ marker.label }}</div>\n 91→ </div>\n 92→ }\n 93→ </div>\n 94→ <!-- Playhead - positioned in ruler container to stay visible -->\n 95→ <div class=\"absolute top-0 pointer-events-none z-[5]\"\n 96→ [style.left.px]=\"playheadPosition()\"\n 97→ (mousedown)=\"onPlayheadPointerDown($event)\"\n 98→ (touchstart)=\"onPlayheadPointerDown($event)\">\n 99→ <div class=\"absolute -left-1.5 top-4 w-3 h-3 bg-red-500 rounded-sm cursor-ew-resize pointer-events-auto\"></div>\n 100→ <div class=\"absolute left-0 top-4 w-0.5 bg-red-500 pointer-events-none\" [style.height.px]=\"timelineLineHeight()\"></div>\n 101→ </div>\n 102→ </div>\n 103→ </div>\n 104→\n 105→ <!-- Tracks -->\n 106→ <div class=\"flex-1\" [style.width.px]=\"timelineWidth() + TRACK_HEADER_WIDTH\">\n 107→ @for (track of state().tracks; track track.id; let i = $index) {\n 108→ <div class=\"flex border-b border-[#3a3a3a] min-h-[60px]\">\n 109→ <!-- Track header -->\n 110→ <div class=\"flex items-center justify-between min-w-[150px] p-2 bg-[#252525] border-r border-[#3a3a3a]\">\n 111→ <span class=\"text-sm font-medium\">Track {{ i + 1 }}</span>\n 112→ <div class=\"flex gap-1\">\n 113→ <button\n 114→ (click)=\"openMediaLibrary(track.id)\"\n 115→ class=\"p-1 text-base text-white border-none bg-transparent cursor-pointer transition-opacity opacity-70 hover:opacity-100\"\n 116→ title=\"Add media\">\n 117→ <i class=\"bi bi-plus-circle\"></i>\n 118→ </button>\n 119→ <button\n 120→ (click)=\"removeTrack(track.id)\"\n 121→ class=\"p-1 text-base text-red-500 border-none bg-transparent cursor-pointer transition-opacity opacity-70 hover:opacity-100\"\n 122→ title=\"Remove track\">\n 123→ <i class=\"bi bi-trash\"></i>\n 124→ </button>\n 125→ </div>\n 126→ </div>\n 127→\n 128→ <!-- Track timeline -->\n 129→ <div class=\"relative flex-1\">\n 130→ <div class=\"track relative bg-[#1a1a1a] min-h-[60px]\"\n 131→ (mousemove)=\"onTrackPointerMove($event, track)\"\n 132→ (mousedown)=\"onTrackPointerDown($event)\"\n 133→ (touchmove)=\"onTrackPointerMove($event, track)\"\n 134→ (touchstart)=\"onTrackPointerDown($event)\">\n 135→\n 136→ @for (item of track.items; track item.id) {\n 137→ <div class=\"media-item group absolute h-12 top-1.5 rounded border-2 border-transparent cursor-move flex items-center overflow-hidden transition-colors hover:border-white/30\"\n 138→ [class]=\"getMediaTypeClass(item.type)\"\n 139→ [class.selected]=\"isItemSelected(item.id)\"\n 140→ [style.left]=\"getItemStyle(item).left\"\n 141→ [style.width]=\"getItemStyle(item).width\"\n 142→ (mousedown)=\"onMediaItemPointerDown($event, item, track)\"\n 143→ (touchstart)=\"onMediaItemPointerDown($event, item, track)\">\n 144→\n 145→ <div class=\"resize-handle resize-handle-left absolute top-0 left-0 w-2 h-full cursor-ew-resize z-[2] bg-gradient-to-r from-white/30 to-transparent hover:bg-white/50\"></div>\n 146→\n 147→ <div class=\"flex items-center gap-1.5 px-2 flex-1 overflow-hidden\">\n 148→ <div class=\"text-lg flex-shrink-0\">\n 149→ @switch (item.type) {\n 150→ @case (MediaType.VIDEO) {\n 151→ <i class=\"bi bi-camera-video-fill\"></i>\n 152→ }\n 153→ @case (MediaType.AUDIO) {\n 154→ <i class=\"bi bi-volume-up-fill\"></i>\n 155→ }\n 156→ @case (MediaType.IMAGE) {\n 157→ <i class=\"bi bi-image-fill\"></i>\n 158→ }\n 159→ }\n 160→ </div>\n 161→ <div class=\"flex flex-col overflow-hidden flex-1\">\n 162→ <div class=\"text-[11px] font-medium whitespace-nowrap overflow-hidden text-ellipsis\">{{ item.name }}</div>\n 163→ <div class=\"text-[9px] text-white/60 font-mono\">\n 164→ @if (item.mediaStartTime && item.mediaStartTime > 0) {\n 165→ <span>{{ formatTime(item.mediaStartTime) }} - </span>\n 166→ }\n 167→ {{ formatTime(item.duration) }}\n 168→ </div>\n 169→ </div>\n 170→ </div>\n 171→\n 172→ <div class=\"resize-handle resize-handle-right absolute top-0 right-0 w-2 h-full cursor-ew-resize z-[2] bg-gradient-to-l from-white/30 to-transparent hover:bg-white/50\"></div>\n 173→\n 174→ <button\n 175→ class=\"media-item-delete absolute top-0.5 right-0.5 w-5 h-5 bg-black/60 text-white border-none rounded-full cursor-pointer text-xs leading-none p-0 hidden items-center justify-center hover:bg-red-600\"\n 176→ (click)=\"removeMediaItem(item.id, track.id); $event.stopPropagation()\">\n 177→ <i class=\"bi bi-x\"></i>\n 178→ </button>\n 179→ </div>\n 180→ }\n 181→ </div>\n 182→ </div>\n 183→ </div>\n 184→ }\n 185→ </div>\n 186→ </div>\n 187→\n 188→ <!-- Duration Editor Modal -->\n 189→ @if (showDurationEditor()) {\n 190→ <div class=\"fixed inset-0 bg-black/50 flex items-center justify-center z-[2000]\" (click)=\"closeDurationEditor()\">\n 191→ <div class=\"bg-[#2a2a2a] rounded-lg p-6 min-w-[400px] border border-[#3a3a3a]\" (click)=\"$event.stopPropagation()\">\n 192→ <h3 class=\"text-lg font-semibold mb-4 mt-0\">Total video duration</h3>\n 193→\n 194→ <div class=\"mb-4\">\n 195→ <label class=\"block text-sm text-gray-400 mb-2\">Duration (in seconds):</label>\n 196→ <input\n 197→ type=\"number\"\n 198→ min=\"1\"\n 199→ max=\"3600\"\n 200→ step=\"1\"\n 201→ [value]=\"state().totalDuration / 1000\"\n 202→ (input)=\"onDurationInputChange($event)\"\n 203→ class=\"w-full px-3 py-2 bg-[#1e1e1e] border border-[#3a3a3a] rounded text-white focus:outline-none focus:border-blue-500\"\n 204→ placeholder=\"60\">\n 205→ <div class=\"text-xs text-gray-500 mt-1\">Current value: {{ formatTime(state().totalDuration) }}</div>\n 206→ </div>\n 207→\n 208→ <div class=\"flex gap-2 justify-end\">\n 209→ <button\n 210→ (click)=\"closeDurationEditor()\"\n 211→ class=\"px-4 py-2 bg-[#3a3a3a] text-white border-none rounded cursor-pointer transition-colors hover:bg-[#4a4a4a]\">\n 212→ Cancel\n 213→ </button>\n 214→ <button\n 215→ (click)=\"saveDuration()\"\n 216→ class=\"px-4 py-2 bg-blue-600 text-white border-none rounded cursor-pointer transition-colors hover:bg-blue-700\">\n 217→ Save\n 218→ </button>\n 219→ </div>\n 220→ </div>\n 221→ </div>\n 222→ }\n 223→\n 224→ <!-- Media Library Modal -->\n 225→ @if (showMediaLibrary()) {\n 226→ <app-media-library\n 227→ (closeModal)=\"closeMediaLibrary()\"\n 228→ (selectMedia)=\"onMediaSelected($event)\">\n 229→ </app-media-library>\n 230→ }\n 231→\n 232→ <!-- Notifications -->\n 233→ <app-notifications #notifications></app-notifications>\n 234→</div>\n 235→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"
}
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"content": "<div class=\"flex flex-col h-full bg-[#1e1e1e] text-gray-200 select-none\" (mouseup)=\"onPointerUp($event)\" (mousemove)=\"onDocumentPointerMove($event)\" (touchend)=\"onPointerUp($event)\" (touchmove)=\"onDocumentPointerMove($event)\">\n <!-- Toolbar -->\n <div class=\"flex justify-between items-center px-4 py-3 bg-[#252525] border-b border-[#3a3a3a]\">\n <h2 class=\"text-lg font-semibold m-0\">VideoEditor</h2>\n <div class=\"flex gap-4 items-center\">\n <button\n (click)=\"newProject()\"\n class=\"px-3 py-1.5 bg-[#3a3a3a] text-white border-none rounded cursor-pointer text-sm transition-colors hover:bg-[#4a4a4a] flex items-center gap-2\"\n title=\"Create new project (clears timeline and saved data)\">\n <i class=\"bi bi-file-earmark-plus\"></i>\n <span>New project</span>\n </button>\n <div class=\"font-mono text-sm px-3 py-1 bg-[#2a2a2a] rounded cursor-pointer hover:bg-[#3a3a3a] transition-colors\"\n (click)=\"openDurationEditor()\"\n title=\"Click to change total duration\">\n {{ formatTime(state().playheadPosition) }} / {{ formatTime(state().totalDuration) }}\n </div>\n </div>\n </div>\n\n <!-- Video Preview Area -->\n <div class=\"flex justify-center items-center py-6 bg-[#252525] border-b border-[#3a3a3a]\">\n <div class=\"flex flex-col items-center gap-3\">\n <!-- Video Preview Canvas -->\n <div class=\"w-[640px] h-[360px] bg-[#1a1a1a] rounded-lg border border-[#3a3a3a] flex items-center justify-center overflow-hidden\">\n <canvas #previewCanvas\n [width]=\"PREVIEW_WIDTH\"\n [height]=\"PREVIEW_HEIGHT\"\n class=\"w-full h-full\">\n </canvas>\n </div>\n\n <!-- Playback Controls -->\n <div class=\"flex gap-2 items-center\">\n <button (click)=\"skipBackward()\" class=\"px-3 py-2 bg-[#3a3a3a] text-white border-none rounded cursor-pointer text-base transition-colors hover:bg-[#4a4a4a] flex items-center gap-1.5\" title=\"Back 5 seconds\">\n <i class=\"bi bi-skip-backward-fill\"></i>\n <span class=\"text-xs\">5s</span>\n </button>\n <button (click)=\"togglePlayback()\" class=\"px-4 py-2 bg-blue-600 text-white border-none rounded cursor-pointer text-xl transition-colors hover:bg-blue-700\" [title]=\"isPlaying() ? 'Pause' : 'Play'\">\n @if (isPlaying()) {\n <i class=\"bi bi-pause-fill\"></i>\n } @else {\n <i class=\"bi bi-play-fill\"></i>\n }\n </button>\n <button (click)=\"skipForward()\" class=\"px-3 py-2 bg-[#3a3a3a] text-white border-none rounded cursor-pointer text-base transition-colors hover:bg-[#4a4a4a] flex items-center gap-1.5\" title=\"Forward 5 seconds\">\n <span class=\"text-xs\">5s</span>\n <i class=\"bi bi-skip-forward-fill\"></i>\n </button>\n </div>\n </div>\n </div>\n\n <div class=\"relative\">\n <!-- Media Toolbar (positioned absolutely above timeline, aligned with left panel) -->\n <app-media-toolbar\n [isVisible]=\"hasSelectedItem()\"\n [hasClipboard]=\"hasClipboardItem()\"\n (trimMedia)=\"trimSelectedMedia()\"\n (copyMedia)=\"copySelectedMedia()\"\n (pasteMedia)=\"pasteMedia()\">\n </app-media-toolbar>\n </div>\n <!-- Timeline content wrapper with unified horizontal scrolling -->\n <div class=\"flex-1 flex flex-col overflow-y-auto overflow-x-auto relative\">\n <!-- Timeline Ruler (sticky to stay visible during vertical scroll) -->\n <div class=\"flex border-b border-[#3a3a3a] flex-shrink-0 sticky top-0 z-10 bg-[#2a2a2a] relative\">\n <!-- Control area to align with track headers -->\n <div class=\"min-w-[150px] bg-[#252525] border-r border-[#3a3a3a] flex justify-center items-center gap-1 p-2\">\n <button (click)=\"addTrack()\" class=\"px-2 py-1 text-white border-none rounded cursor-pointer text-sm opacity-70 transition-opacity hover:opacity-100\" title=\"Add track\">\n <i class=\"bi bi-plus-circle\"></i>\n </button>\n <button (click)=\"zoomOut()\" class=\"px-2 py-1 text-white border-none rounded cursor-pointer text-sm opacity-70 transition-opacity hover:opacity-100\" title=\"Zoom out\">\n <i class=\"bi bi-zoom-out\"></i>\n </button>\n <button (click)=\"zoomIn()\" class=\"px-2 py-1 text-white border-none rounded cursor-pointer text-sm opacity-70 transition-opacity hover:opacity-100\" title=\"Zoom in\">\n <i class=\"bi bi-zoom-in\"></i>\n </button>\n </div>\n <!-- Ruler content -->\n <div class=\"relative h-10 bg-[#2a2a2a] flex-1\">\n <div class=\"relative h-full min-w-full cursor-pointer\"\n [style.width.px]=\"timelineWidth()\"\n (mousedown)=\"onRulerPointerDown($event)\"\n (touchstart)=\"onRulerPointerDown($event)\"\n #timelineRuler>\n @for (marker of getTimeMarkers(); track marker.position) {\n <div class=\"absolute top-0 h-full\" [style.left.px]=\"marker.position\">\n <div class=\"w-px h-[60%] bg-[#4a4a4a]\"></div>\n <div class=\"text-[10px] text-gray-400 mt-0.5 whitespace-nowrap\">{{ marker.label }}</div>\n </div>\n }\n </div>\n <!-- Playhead - positioned in ruler container to stay visible -->\n <div class=\"absolute top-0 pointer-events-none z-[5]\"\n [style.left.px]=\"playheadPosition()\"\n (mousedown)=\"onPlayheadPointerDown($event)\"\n (touchstart)=\"onPlayheadPointerDown($event)\">\n <div class=\"absolute -left-1.5 top-4 w-3 h-3 bg-red-500 rounded-sm cursor-ew-resize pointer-events-auto\"></div>\n <div class=\"absolute left-0 top-4 w-0.5 bg-red-500 pointer-events-none\" [style.height.px]=\"timelineLineHeight()\"></div>\n </div>\n </div>\n </div>\n\n <!-- Tracks -->\n <div class=\"flex-1\" [style.width.px]=\"timelineWidth() + TRACK_HEADER_WIDTH\">\n @for (track of state().tracks; track track.id; let i = $index) {\n <div class=\"flex border-b border-[#3a3a3a] min-h-[60px]\">\n <!-- Track header -->\n <div class=\"flex items-center justify-between min-w-[150px] p-2 bg-[#252525] border-r border-[#3a3a3a]\">\n <span class=\"text-sm font-medium\">Track {{ i + 1 }}</span>\n <div class=\"flex gap-1\">\n <button\n (click)=\"openMediaLibrary(track.id)\"\n class=\"p-1 text-base text-white border-none bg-transparent cursor-pointer transition-opacity opacity-70 hover:opacity-100\"\n title=\"Add media\">\n <i class=\"bi bi-plus-circle\"></i>\n </button>\n <button\n (click)=\"removeTrack(track.id)\"\n class=\"p-1 text-base text-red-500 border-none bg-transparent cursor-pointer transition-opacity opacity-70 hover:opacity-100\"\n title=\"Remove track\">\n <i class=\"bi bi-trash\"></i>\n </button>\n </div>\n </div>\n\n <!-- Track timeline -->\n <div class=\"relative flex-1\">\n <div class=\"track relative bg-[#1a1a1a] min-h-[60px]\"\n (mousemove)=\"onTrackPointerMove($event, track)\"\n (mousedown)=\"onTrackPointerDown($event)\"\n (touchmove)=\"onTrackPointerMove($event, track)\"\n (touchstart)=\"onTrackPointerDown($event)\">\n\n @for (item of track.items; track item.id) {\n <div class=\"media-item group absolute h-12 top-1.5 rounded border-2 border-transparent cursor-move flex items-center overflow-hidden transition-colors hover:border-white/30\"\n [class]=\"getMediaTypeClass(item.type)\"\n [class.selected]=\"isItemSelected(item.id)\"\n [style.left]=\"getItemStyle(item).left\"\n [style.width]=\"getItemStyle(item).width\"\n (mousedown)=\"onMediaItemPointerDown($event, item, track)\"\n (touchstart)=\"onMediaItemPointerDown($event, item, track)\">\n\n <div class=\"resize-handle resize-handle-left absolute top-0 left-0 w-2 h-full cursor-ew-resize z-[2] bg-gradient-to-r from-white/30 to-transparent hover:bg-white/50\"></div>\n\n <div class=\"flex items-center gap-1.5 px-2 flex-1 overflow-hidden\">\n <div class=\"text-lg flex-shrink-0\">\n @switch (item.type) {\n @case (MediaType.VIDEO) {\n <i class=\"bi bi-camera-video-fill\"></i>\n }\n @case (MediaType.AUDIO) {\n <i class=\"bi bi-volume-up-fill\"></i>\n }\n @case (MediaType.IMAGE) {\n <i class=\"bi bi-image-fill\"></i>\n }\n }\n </div>\n <div class=\"flex flex-col overflow-hidden flex-1\">\n <div class=\"text-[11px] font-medium whitespace-nowrap overflow-hidden text-ellipsis\">{{ item.name }}</div>\n <div class=\"text-[9px] text-white/60 font-mono\">\n @if (item.mediaStartTime && item.mediaStartTime > 0) {\n <span>{{ formatTime(item.mediaStartTime) }} - </span>\n }\n {{ formatTime(item.duration) }}\n </div>\n </div>\n </div>\n\n <div class=\"resize-handle resize-handle-right absolute top-0 right-0 w-2 h-full cursor-ew-resize z-[2] bg-gradient-to-l from-white/30 to-transparent hover:bg-white/50\"></div>\n\n <button\n class=\"media-item-delete absolute top-0.5 right-0.5 w-5 h-5 bg-black/60 text-white border-none rounded-full cursor-pointer text-xs leading-none p-0 hidden items-center justify-center hover:bg-red-600\"\n (click)=\"removeMediaItem(item.id, track.id); 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"content": " 1→import { Injectable } from '@angular/core';\n 2→import { TimelineState } from '../models/timeline.models';\n 3→\n 4→@Injectable({\n 5→ providedIn: 'root'\n 6→})\n 7→export class Timel************rvice {\n 8→ private readonly STORAGE_KEY = 'video-timeline-state';\n 9→\n 10→ /**\n 11→ * Save timeline state to LocalStorage\n 12→ */\n 13→ saveState(state: TimelineState): void {\n 14→ try {\n 15→ const serialized = JSON.stringify(state);\n 16→ localStorage.setItem(this.STORAGE_KEY, serialized);\n 17→ } catch (error) {\n 18→ console.error('Failed to save timeline state to LocalStorage:', error);\n 19→ }\n 20→ }\n 21→\n 22→ /**\n 23→ * Load timeline state from LocalStorage\n 24→ * Returns null if no saved state exists or if loading fails\n 25→ */\n 26→ loadState(): TimelineState | null {\n 27→ try {\n 28→ const serialized = localStorage.getItem(this.STORAGE_KEY);\n 29→ if (serialized) {\n 30→ return JSON.parse(serialized) as TimelineState;\n 31→ }\n 32→ return null;\n 33→ } catch (error) {\n 34→ console.error('Failed to load timeline state from LocalStorage:', error);\n 35→ return null;\n 36→ }\n 37→ }\n 38→\n 39→ /**\n 40→ * Clear timeline state from LocalStorage\n 41→ */\n 42→ clearState(): void {\n 43→ try {\n 44→ localStorage.removeItem(this.STORAGE_KEY);\n 45→ } catch (error) {\n 46→ console.error('Failed to clear timeline state from LocalStorage:', error);\n 47→ }\n 48→ }\n 49→\n 50→ /**\n 51→ * Check if saved state exists\n 52→ */\n 53→ hasSavedState(): boolean {\n 54→ return localStorage.getItem(this.STORAGE_KEY) !== null;\n 55→ }\n 56→}\n 57→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"
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[2025-12-22T21:45:21.628Z] [INFO] {"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01B5Wuy8SVeuo8Zs3C7tSXyZ","type":"tool_result","content":" 1→import { Injectable } from '@angular/core';\n 2→import { MediaItem } from '../models/timeline.models';\n 3→\n 4→/**\n 5→ * Service responsible for handling drag-and-drop logic and timeline positioning\n 6→ * Extracted from timeline.component.ts for better code organization\n 7→ */\n 8→@Injectable({\n 9→ providedIn: 'root'\n 10→})\n 11→export class Timel*************rvice {\n 12→ private readonly MIN_ITEM_DURATION = 100; // Minimum item duration in milliseconds\n 13→ readonly SNAP_DISTANCE_MS = 200; // Snapping distance in milliseconds for drag operations\n 14→\n 15→ constructor() { }\n 16→\n 17→ /**\n 18→ * Check if two items overlap\n 19→ */\n 20→ itemsOverlap(item1: MediaItem, item2: MediaItem): boolean {\n 21→ const item1End = item1.startTime + item1.duration;\n 22→ const item2End = item2.startTime + item2.duration;\n 23→ return !(item1End <= item2.startTime || item2End <= item1.startTime);\n 24→ }\n 25→\n 26→ /**\n 27→ * Finds the closest item to the given time position in the track\n 28→ * Returns null if no items exist in the track\n 29→ */\n 30→ findClosestItem(trackItems: MediaItem[], time: number): MediaItem | null {\n 31→ if (trackItems.length === 0) return null;\n 32→\n 33→ let closestItem = trackItems[0];\n 34→ let minDistance = Math.abs(closestItem.startTime - time);\n 35→\n 36→ for (const item of trackItems) {\n 37→ const itemEnd = item.startTime + item.duration;\n 38→\n 39→ // Calculate distance to the start of the item\n 40→ const distanceToStart = Math.abs(item.startTime - time);\n 41→\n 42→ // Calculate distance to the end of the item\n 43→ const distanceToEnd = Math.abs(itemEnd - time);\n 44→\n 45→ // Use
[2025-12-22T21:45:21.635Z] [INFO] the minimum distance (to either start or end of item)\n 46→ const distance = Math.min(distanceToStart, distanceToEnd);\n 47→\n 48→ if (distance < minDistance) {\n 49→ minDistance = distance;\n 50→ closestItem = item;\n 51→ }\n 52→ }\n 53→\n 54→ return closestItem;\n 55→ }\n 56→\n 57→ /**\n 58→ * Find all gaps in the track\n 59→ * Used for finding the closest gap when requested position overlaps an item\n 60→ */\n 61→ findAllGaps(trackItems: MediaItem[]): { gapStart: number; gapEnd: number; leftItem: MediaItem | null; rightItem: MediaItem | null }[] {\n 62→ const gaps: { gapStart: number; gapEnd: number; leftItem: MediaItem | null; rightItem: MediaItem | null }[] = [];\n 63→ const sortedItems = [...trackItems].sort((a, b) => a.startTime - b.startTime);\n 64→\n 65→ if (sortedItems.length === 0) {\n 66→ return [{ gapStart: 0, gapEnd: Infinity, leftItem: null, rightItem: null }];\n 67→ }\n 68→\n 69→ // Gap before first item\n 70→ if (sortedItems[0].startTime > 0) {\n 71→ gaps.push({\n 72→ gapStart: 0,\n 73→ gapEnd: sortedItems[0].startTime,\n 74→ leftItem: null,\n 75→ rightItem: sortedItems[0]\n 76→ });\n 77→ }\n 78→\n 79→ // Gaps between items\n 80→ for (let i = 0; i < sortedItems.length - 1; i++) {\n 81→ const leftItem = sortedItems[i];\n 82→ const rightItem = sortedItems[i + 1];\n 83→ const gapStart = leftItem.startTime + leftItem.duration;\n 84→ const gapEnd = rightItem.startTime;\n 85→\n 86→ if (gapEnd > gapStart) {\n 87→ gaps.push({ gapStart, gapEnd, leftItem, rightItem });\n 88→ }\n 89→ }\n 90→\n 91→ // Gap after last item\n 92→ const lastItem = sortedItems[sortedItems.length - 1];\n 93→ gaps.push({\n 94→ gapStart: lastItem.startTime + lastItem.duration,\n 95→ gapEnd: Infinity,\n 96→ leftItem: lastItem,\n 97→ rightItem: null\n 98→ });\n 99→\n 100→ return gaps;\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"parent_tool_use_id":"toolu_01425HweE7Hcod1btvhp65G7","session_id":"c3de30fe-a5bd-49e6-8052-bb51f10fe87f","uuid":"11faf6b5-5532-4065-8c41-5cc2c5086fe5","tool_use_result":{"type":"text","file":{"filePath":"/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/services/timeline-drag-drop.service.ts","content":"import { Injectable } from '@angular/core';\nimport { MediaItem } from '../models/timeline.models';\n\n/**\n * Service responsible for handling drag-and-drop logic and timeline positioning\n * Extracted from timeline.component.ts for better code organization\n */\n@Injectable({\n providedIn: 'root'\n})\nexport class Timel*************rvice {\n private readonly MIN_ITEM_DURATION = 100; // Minimum item duration in milliseconds\n readonly SNAP_DISTANCE_MS = 200; // Snapping distance in milliseconds for drag operations\n\n constructor() { }\n\n /**\n * Check if two items overlap\n */\n itemsOverlap(item1: MediaItem, item2: MediaItem): boolean {\n const item1End = item1.startTime + item1.duration;\n const item2End = item2.startTime + item2.duration;\n return !(item1End <= item2.startTime || item2End <= item1.startTime);\n }\n\n /**\n * Finds the closest item to the given time position in the track\n * Returns null if no items exist in the track\n */\n findClosestItem(trackItems: MediaItem[], time: number): MediaItem | null {\n if (trackItems.length === 0) return null;\n\n let closestItem = trackItems[0];\n let minDistance = Math.abs(closestItem.startTime - time);\n\n for (const item of trackItems) {\n const itemEnd = item.startTime + item.duration;\n\n // Calculate distance to the start of the item\n const distanceToStart = Math.abs(item.startTime - time);\n\n // Calculate distance to the end of the item\n const distanceToEnd = Math.abs(itemEnd - time);\n\n // Use the minimum distance (to either start or end of item)\n const distance = Math.min(distanceToStart, distanceToEnd);\n\n if (distance < minDistance) {\n minDistance = distance;\n closestItem = item;\n }\n }\n\n return closestItem;\n }\n\n /**\n * Find all gaps in the track\n * Used for finding the closest gap when requested position overlaps an item\n */\n findAllGaps(trackItems: MediaItem[]): { gapStart: number; gapEnd: number; leftItem: MediaItem | null; rightItem: MediaItem | null }[] {\n const gaps: { gapStart: number; gapEnd: number; leftItem: MediaItem | null; rightItem: MediaItem | null }[] = [];\n const sortedItems = [...trackItems].sort((a, b) => a.startTime - b.startTime);\n\n if (sortedItems.length === 0) {\n return [{ gapStart: 0, gapEnd: Infinity, leftItem: null, rightItem: null }];\n }\n\n // Gap before first item\n if (sortedItems[0].startTime > 0) {\n gaps.push({\n gapStart: 0,\n gapEnd: sortedItems[0].startTime,\n leftItem: null,\n rightItem: sortedItems[0]\n });\n }\n\n // Gaps between items\n for (let i = 0; i < sortedItems.length - 1; i++) {\n const leftItem = sortedItems[i];\n const rightItem = sortedItems[i + 1];\n const gapStart = leftItem.startTime + leftItem.duration;\n const gapEnd = rightItem.startTime;\n\n if (gapEnd > gapStart) {\n gaps.push({ gapStart, gapEnd, leftItem, rightItem });\n }\n }\n\n // Gap after last item\n const lastItem = sortedItems[sortedItems.length - 1];\n gaps.push({\n gapStart: lastItem.startTime + lastItem.duration,\n gapEnd: Infinity,\n leftItem: lastItem,\n rightItem: null\n });\n\n return gaps;","numLines":100,"startLine":1,"totalLines":491}}}
[2025-12-22T21:45:21.646Z] [INFO] {"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01MezegHQ8DaTKPdRywq89g4","type":"tool_result","content":" 1→import { Injectable, signal, computed } from '@angular/core';\n 2→import { MediaItem, MediaType, Track } from '../models/timeline.models';\n 3→\n 4→/**\n 5→ * Represents an active media element being played\n 6→ */\n 7→export interface ActiveMedia {\n 8→ item: MediaItem;\n 9→ element: HTMLVideoElement | HTMLAudioElement | HTMLImageElement;\n 10→ trackOrder: number; // For layering: higher order = rendered first (bottom layer)\n 11→}\n 12→\n 13→/**\n 14→ * Service responsible for managing real media playback.\n 15→ * Handles synchronization of media elements with timeline playhead position.\n 16→ */\n 17→@Injectable({\n 18→ providedIn: 'root'\n 19→})\n 20→export class PlaybackService {\n 21→ // Playback state\n 22→ private _isPlaying = signal<boolean>(false);\n 23→ private _playheadPosition = signal<number>(0);\n 24→ private animationFrameId: number | null = null;\n 25→ private lastFrameTime: number = 0;\n 26→\n 27→ // Active media elements\n 28→ private activeMediaMap = new Map<string, ActiveMedia>();\n 29→\n 30→ // Canvas reference for rendering\n 31→ private canvas: HTMLCanvasElement | null = null;\n 32→ private canvasContext: Canva**************ext2D | null = null;\n 33→\n 34→ // Exposed signals\n 35→ readonly isPlaying = this._isPlaying.asReadonly();\n 36→ readonly playheadPosition = this._playheadPosition.asReadonly();\n 37→\n 38→ // Computed: current active media items for rendering\n 39→ readonly activeMediaItems = computed(() => {\n 40→ return Array.from(this.activeMediaMap.values())\n 41→ .sort((a, b) => b.trackOrder - a.trackOrder);\n 42→ });\n 43→\n 44→ constructor() {}\n 45→\n 46→ /**\n 47→ * Set the canvas element for rendering video/image pre
[2025-12-22T21:45:21.658Z] [INFO] view\n 48→ */\n 49→ setCanvas(canvas: HTMLCanvasElement): void {\n 50→ this.canvas = canvas;\n 51→ this.canvasContext = canvas.getContext('2d');\n 52→ }\n 53→\n 54→ /**\n 55→ * Update playhead position (called from timeline component)\n 56→ */\n 57→ setPlayheadPosition(position: number): void {\n 58→ this._playheadPosition.set(position);\n 59→ }\n 60→\n 61→ /**\n 62→ * Start playback\n 63→ */\n 64→ play(tracks: Track[], totalDuration: number): void {\n 65→ if (this._isPlaying()) return;\n 66→\n 67→ this._isPlaying.set(true);\n 68→\n 69→ // Start playing any already-loaded media elements\n 70→ for (const activeMedia of this.activeMediaMap.values()) {\n 71→ if (activeMedia.element instanceof HTMLVideoElement) {\n 72→ const videoElement = activeMedia.element as HTMLVideoElement;\n 73→ videoElement.play().catch(() => {\n 74→ // Autoplay may be blocked, try muted\n 75→ videoElement.muted = true;\n 76→ videoElement.play().catch(() => {});\n 77→ });\n 78→ } else if (activeMedia.element instanceof HTMLAudioElement) {\n 79→ activeMedia.element.play().catch(() => {});\n 80→ }\n 81→ }\n 82→\n 83→ this.lastFrameTime = performance.now();\n 84→ this.startPlaybackLoop(tracks, totalDuration);\n 85→ }\n 86→\n 87→ /**\n 88→ * Pause playback\n 89→ */\n 90→ pause(): void {\n 91→ this._isPlaying.set(false);\n 92→ if (this.animationFrameId !== null) {\n 93→ cancelAnimationFrame(this.animationFrameId);\n 94→ this.animationFrameId = null;\n 95→ }\n 96→\n 97→ // Pause all active media\n 98→ for (const activeMedia of this.activeMediaMap.values()) {\n 99→ if (activeMedia.element instanceof HTMLVideoElement ||\n 100→ activeMedia.element instanceof HTMLAudioElement) {\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"parent_tool_use_id":"toolu_01425HweE7Hcod1btvhp65G7","session_id":"c3de30fe-a5bd-49e6-8052-bb51f10fe87f","uuid":"a287da1c-f5fc-43bc-9d71-5064edf65983","tool_use_result":{"type":"text","file":{"filePath":"/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/services/playback.service.ts","content":"import { Injectable, signal, computed } from '@angular/core';\nimport { MediaItem, MediaType, Track } from '../models/timeline.models';\n\n/**\n * Represents an active media element being played\n */\nexport interface ActiveMedia {\n item: MediaItem;\n element: HTMLVideoElement | HTMLAudioElement | HTMLImageElement;\n trackOrder: number; // For layering: higher order = rendered first (bottom layer)\n}\n\n/**\n * Service responsible for managing real media playback.\n * Handles synchronization of media elements with timeline playhead position.\n */\n@Injectable({\n providedIn: 'root'\n})\nexport class PlaybackService {\n // Playback state\n private _isPlaying = signal<boolean>(false);\n private _playheadPosition = signal<number>(0);\n private animationFrameId: number | null = null;\n private lastFrameTime: number = 0;\n\n // Active media elements\n private activeMediaMap = new Map<string, ActiveMedia>();\n\n // Canvas reference for rendering\n private canvas: HTMLCanvasElement | null = null;\n private canvasContext: Canva**************ext2D | null = null;\n\n // Exposed signals\n readonly isPlaying = this._isPlaying.asReadonly();\n readonly playheadPosition = this._playheadPosition.asReadonly();\n\n // Computed: current active media items for rendering\n readonly activeMediaItems = computed(() => {\n return Array.from(this.activeMediaMap.values())\n .sort((a, b) => b.trackOrder - a.trackOrder);\n });\n\n constructor() {}\n\n /**\n * Set the canvas element for rendering video/image preview\n */\n setCanvas(canvas: HTMLCanvasElement): void {\n this.canvas = canvas;\n this.canvasContext = canvas.getContext('2d');\n }\n\n /**\n * Update playhead position (called from timeline component)\n */\n setPlayheadPosition(position: number): void {\n this._playheadPosition.set(position);\n }\n\n /**\n * Start playback\n */\n play(tracks: Track[], totalDuration: number): void {\n if (this._isPlaying()) return;\n\n this._isPlaying.set(true);\n\n // Start playing any already-loaded media elements\n for (const activeMedia of this.activeMediaMap.values()) {\n if (activeMedia.element instanceof HTMLVideoElement) {\n const videoElement = activeMedia.element as HTMLVideoElement;\n videoElement.play().catch(() => {\n // Autoplay may be blocked, try muted\n videoElement.muted = true;\n videoElement.play().catch(() => {});\n });\n } else if (activeMedia.element instanceof HTMLAudioElement) {\n activeMedia.element.play().catch(() => {});\n }\n }\n\n this.lastFrameTime = performance.now();\n this.startPlaybackLoop(tracks, totalDuration);\n }\n\n /**\n * Pause playback\n */\n pause(): void {\n this._isPlaying.set(false);\n if (this.animationFrameId !== null) {\n cancelAnimationFrame(this.animationFrameId);\n this.animationFrameId = null;\n }\n\n // Pause all active media\n for (const activeMedia of this.activeMediaMap.values()) {\n if (activeMedia.element instanceof HTMLVideoElement ||\n activeMedia.element instanceof HTMLAudioElement) {","numLines":100,"startLine":1,"totalLines":432}}}
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"content": " 1→import { Component, signal, NgZone, inject } from '@angular/core';\n 2→import { CommonModule } from '@angular/common';\n 3→\n 4→export interface Notification {\n 5→ id: string;\n 6→ message: string;\n 7→ type: 'info' | 'success' | 'warning' | 'error';\n 8→}\n 9→\n 10→/** Tracks progress bar state for a notification */\n 11→interface Notif************State {\n 12→ animationFrameId: number | null;\n 13→ startTime: number;\n 14→ remainingTime: number;\n 15→ isPaused: boolean;\n 16→}\n 17→\n 18→@Component({\n 19→ selector: 'app-notifications',\n 20→ standalone: true,\n 21→ imports: [CommonModule],\n 22→ templateUrl: './notifications.component.html',\n 23→ styleUrl: './notifications.component.css'\n 24→})\n 25→export class Notif************onent {\n 26→ private readonly AUTO_DISMISS_DELAY = 4000; // 4 seconds\n 27→ private readonly ngZone = inject(NgZone);\n 28→\n 29→ // Internal state\n 30→ readonly notifications = signal<Notification[]>([]);\n 31→\n 32→ // Track timers and progress for each notification\n 33→ private timerStates = new Map<string, NotificationTimerState>();\n 34→\n 35→ // Track progress percentage for each notification (0-100)\n 36→ readonly progressMap = signal<Map<string, number>>(new Map());\n 37→\n 38→ /**\n 39→ * Show a notification that auto-dismisses after 4 seconds.\n 40→ * Timer pauses on hover and continues from remaining time when cursor leaves.\n 41→ */\n 42→ showNotification(message: string, type: Notification['type'] = 'info'): void {\n 43→ const id = `notification-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;\n 44→ const notification: Notification = { id, message, type };\n 45→\n 46→ // Initialize timer state with full duration\n 47→ this.timerStates.set(id, {\n 48→ animationFrameId: null,\n 49→ startTime: Date.now(),\n 50→ remainingTime: this.AUTO_DISMISS_DELAY,\n 51→ isPaused: false\n 52→ });\n 53→\n 54→ // Initialize progress at 100%\n 55→ this.progressMap.update(map => {\n 56→ const newMap = new Map(map);\n 57→ newMap.set(id, 100);\n 58→ return newMap;\n 59→ });\n 60→\n 61→ this.notifications.update(list => [...list, notification]);\n 62→ this.startProgressAnimation(id);\n 63→ }\n 64→\n 65→ /**\n 66→ * Remove a notification by ID\n 67→ */\n 68→ dismissNotification(id: string): void {\n 69→ this.stopProgressAnimation(id);\n 70→ this.timerStates.delete(id);\n 71→ this.notifications.update(list => list.filter(n => n.id !== id));\n 72→\n 73→ // Clean up progress map\n 74→ this.progressMap.update(map => {\n 75→ const newMap = new Map(map);\n 76→ newMap.delete(id);\n 77→ return newMap;\n 78→ });\n 79→\n 80→ }\n 81→\n 82→ /**\n 83→ * Called when mouse enters the notification - pause the timer and progress bar\n 84→ */\n 85→ onNotificationMouseEnter(id: string): void {\n 86→ const state = this.timerStates.get(id);\n 87→ if (state && !state.isPaused) {\n 88→ // Calculate remaining time based on elapsed time since last start\n 89→ const elapsed = Date.now() - state.startTime;\n 90→ state.remainingTime = Math.max(0, state.remainingTime - elapsed);\n 91→ state.isPaused = true;\n 92→\n 93→ // Stop the animation loop\n 94→ this.stopProgressAnimation(id);\n 95→ }\n 96→ }\n 97→\n 98→ /**\n 99→ * Called when mouse leaves the notification - continue the timer from remaining time\n 100→ */\n 101→ onNotificationMouseLeave(id: string): void {\n 102→ const state = this.timerStates.get(id);\n 103→ if (state && state.isPaused) {\n 104→ state.isPaused = false;\n 105→ state.startTime = Date.now();\n 106→\n 107→ // Resume the animation loop\n 108→ this.startProgressAnimation(id);\n 109→ }\n 110→ }\n 111→\n 112→ /**\n 113→ * Get the icon class for a notification type\n 114→ */\n 115→ getNotificationIcon(type: Notification['type']): string {\n 116→ switch (type) {\n 117→ case 'success':\n 118→ return 'bi-check-circle-fill';\n 119→ case 'warning':\n 120→ return 'bi-exclamation-triangle-fill';\n 121→ case 'error':\n 122→ return 'bi-x-circle-fill';\n 123→ case 'info':\n 124→ default:\n 125→ return 'bi-info-circle-fill';\n 126→ }\n 127→ }\n 128→\n 129→ /**\n 130→ * Get the progress bar color based on notification type\n 131→ */\n 132→ getProgressColor(type: Notification['type']): string {\n 133→ switch (type) {\n 134→ case 'success':\n 135→ return '#22c55e';\n 136→ case 'warning':\n 137→ return '#f59e0b';\n 138→ case 'error':\n 139→ return '#ef4444';\n 140→ case 'info':\n 141→ default:\n 142→ return '#3b82f6';\n 143→ }\n 144→ }\n 145→\n 146→ /**\n 147→ * Get progress percentage for a notification\n 148→ */\n 149→ getProgress(id: string): number {\n 150→ return this.progressMap().get(id) ?? 100;\n 151→ }\n 152→\n 153→ /**\n 154→ * Start the progress bar animation using requestAnimationFrame.\n 155→ * This provides smooth animation and precise timing synchronization\n 156→ * between the visual progress bar and the dismiss timer.\n 157→ */\n 158→ private startProgressAnimation(id: string): void {\n 159→ const state = this.timerStates.get(id);\n 160→ if (!state) return;\n 161→\n 162→ // Cancel any existing animation\n 163→ this.stopProgressAnimation(id);\n 164→\n 165→ const animate = (): void => {\n 166→ const currentState = this.timerStates.get(id);\n 167→ if (!currentState || currentState.isPaused) return;\n 168→\n 169→ const elapsed = Date.now() - currentState.startTime;\n 170→ const remaining = Math.max(0, currentState.remainingTime - elapsed);\n 171→ const progressPercent = (remaining / this.AUTO_DISMISS_DELAY) * 100;\n 172→\n 173→ // Update progress in the map\n 174→ this.progressMap.update(map => {\n 175→ const newMap = new Map(map);\n 176→ newMap.set(id, progressPercent);\n 177→ return newMap;\n 178→ });\n 179→\n 180→ // Dismiss when progress reaches 0\n 181→ if (remaining <= 0) {\n 182→ this.dismissNotification(id);\n 183→ return;\n 184→ }\n 185→\n 186→ // Continue animation loop outside Angular zone for performance\n 187→ this.ngZone.runOutsideAngular(() => {\n 188→ currentState.animationFrameId = requestAnimationFrame(() => {\n 189→ this.ngZone.run(() => animate());\n 190→ });\n 191→ });\n 192→ };\n 193→\n 194→ animate();\n 195→ }\n 196→\n 197→ /**\n 198→ * Stop the progress bar animation\n 199→ */\n 200→ private stopProgressAnimation(id: string): void {\n 201→ const state = this.timerStates.get(id);\n 202→ if (state?.animationFrameId !== null && state?.animationFrameId !== undefined) {\n 203→ cancelAnimationFrame(state.animationFrameId);\n 204→ state.animationFrameId = null;\n 205→ }\n 206→ }\n 207→}\n 208→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"
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[2025-12-22T21:45:37.415Z] [INFO] {"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01Muk8Fg2NbY8sUkB1z8YFng","type":"tool_result","content":" const item1End = item1.startTime + item1.duration;\n const item2End = item2.startTime + item2.duration;\n return !(item1End <= item2.startTime || item2End <= item1.startTime);\n }\n\n /**\n * Finds the closest item to the given time position in the track\n * Returns null if no items exist in the track\n */\n findClosestItem(trackItems: MediaItem[], time: number): MediaItem | null {\n if (trackItems.length === 0) return null;\n\n let closestItem = trackItems[0];\n let minDistance = Math.abs(closestItem.startTime - time);\n\n for (const item of trackItems) {\n const itemEnd = item.startTime + item.duration;\n\n // Calculate distance to the start of the item\n const distanceToStart = Math.abs(item.startTime - time);\n\n // Calculate distance to the end of the item\n const distanceToEnd = Math.abs(itemEnd - time);\n\n // Use the minimum distance (to either start or end of item)\n const distance = Math.min(distanceToStart, distanceToEnd);\n\n if (distance < minDistance) {\n minDistance = distance;\n closestItem = item;","is_error":false}]},"parent_tool_use_id":"toolu_01425HweE7Hcod1btvhp65G7","session_id":"c3de30fe-a5bd-49e6-8052-bb51f10fe87f","uuid":"5ca4c0c3-acd2-45c8-b9d0-3352a107077e","tool_use_result":{"stdout":" const item1End = item1.startTime + item1.duration;\n const item2End = item2.startTime + item2.duration;\n return !(item1End <= item2.startTime || item2End <= item1.startTime);\n }\n\n /**\n * Finds the closest item to the given time position in the track\n * Returns null if no items exist in the track\n */\n findClosestItem(trackItems: MediaItem[], time: number): MediaItem | null {\n if (trackItems.length === 0) return null;\n\n let closestItem = trackItems[0];\n let minDistance = Math.abs(closestItem.startTime - time)
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[2025-12-22T21:45:59.320Z] [INFO] {"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01425HweE7Hcod1btvhp65G7","type":"tool_result","content":[{"type":"text","text":"Perfect! Now I have a comprehensive understanding of the codebase. Let me create a detailed summary report:\n\n## Comprehensive Video-Timeline Codebase Analysis\n\nBased on my exploration of the video-timeline codebase, here's a detailed summary of the findings:\n\n### 1. OVERALL PROJECT STRUCTURE & TECH STACK\n\n**Technology Stack:**\n- **Framework**: Angular 20.3 (standalone components, signals for state management)\n- **Language**: TypeScript 5.9 (strict mode)\n- **Styling**: Tailwind CSS 4.1 + custom CSS\n- **Icons**: Bootstrap Icons 1.13\n- **Reactive Programming**: RxJS 7.8\n- **Testing**: Jasmine 5.9 + Karma 6.4\n\n**Project Structure:**\n```\nvideo-timeline/\n├── src/app/\n│ ├── components/\n│ │ ├── timeline/ (main timeline view)\n│ │ ├── media-library/ (media selection modal)\n│ │ ├── media-toolbar/ (trim, copy, paste buttons)\n│ │ └── notifications/ (toast notifications)\n│ ├── services/\n│ │ ├── timeline-storage.service.ts (LocalStorage persistence)\n│ │ ├── timeline-drag-drop.service.ts (drag/drop & positioning logic)\n│ │ └── playback.service.ts (video/audio playback)\n│ ├── models/\n│ │ └── timeline.models.ts (TypeScript interfaces)\n│ ├── app.ts (root component)\n│ ├── app.config.ts (dependency injection setup)\n│ └── app.routes.ts (routing config)\n└── src/\n └── styles.css (global styles)\n```\n\n### 2. TIMELINE STATE MANAGEMENT\n\n**State Definition** (from `timeline.models.ts`):\n```typescript\ninterface TimelineState {\n tracks: Track[];\n playheadPosition: number; // milliseconds\n zoomLevel: number; // pixels per second\n totalDuration: number; // milliseconds\n selectedItemId: string | nul
[2025-12-22T21:45:59.328Z] [INFO] l;\n}\n\ninterface Track {\n id: string;\n name: string;\n order: number;\n items: MediaItem[];\n}\n\ninterface MediaItem {\n id: string;\n type: MediaType; // VIDEO, AUDIO, IMAGE\n startTime: number; // position on timeline (ms)\n duration: number; // duration shown on timeline (ms)\n mediaStartTime?: number; // offset into source media (ms)\n maxDuration?: number; // max duration for audio/video\n trackId: string;\n name?: string;\n url?: string;\n isPlaceholder?: boolean;\n}\n```\n\n**State Management Approach** (in `timeline.component.ts`):\n- Uses Angular **signal()** for reactive state: `readonly state = signal<TimelineState>(...)`\n- **Auto-saves** to LocalStorage via effect: `effect(() => { this.storageService.saveState(this.state()); })`\n- **Loads** saved state on init from `TimelineStorageService`\n- Uses **signal.update()** for immutable state changes\n- Direct state mutations use spread operators for immutability\n\n### 3. HOW CHANGES TO TIMELINE ARE CURRENTLY HANDLED\n\n**State Modification Pattern:**\nAll changes follow this immutable pattern:\n```typescript\nthis.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t => { /* modifications */ })\n}));\n```\n\n**Key Operations:**\n1. **Track Management**: `addTrack()`, `removeTrack()` - adds/removes tracks from state\n2. **Media Items**: `addMediaItem()`, `removeMediaItem()` - adds/removes items on tracks\n3. **Drag & Drop**: `onTrackPointerMove()` - updates item position and track placement\n4. **Resizing**: `handleResize()` - modifies item duration and mediaStartTime\n5. **Selection**: `selectMediaItem()`, `deselectMediaItem()` - updates selectedItemId\n6. **Editing**: `trimSelectedMedia()`, `copySelectedMedia()`, `pasteMedia()` - complex operations\n7. **Playhead**: `onRulerPointerDown()`, `onDocumentPointerMove()` - updates playheadPosition\n8. **Zoom**: `zoomIn()`, `zoomOut()` - modifies zoomLevel\n\n**Services involved:**\n- `TimelineStorageService`: Persists state to LocalStorage (key: 'video-timeline-state')\n- `TimelineDragDropService`: Calculates valid positions, snap targets, resize bounds\n- `PlaybackService`: Manages video/audio playback and canvas rendering\n\n### 4. UI COMPONENTS & BUTTONS LOCATION\n\n**Header/Top Section** (lines 2-19 of timeline.component.html):\n```\n┌─────────────────────────────────────────────────────┐\n│ VideoEditor [New Project] [00:00 / 2:00] │\n└─────────────────────────────────────────────────────┘\n```\n- **\"New project\"** button - clears timeline & LocalStorage\n- **Duration display** - clickable to edit total duration\n\n**Video Preview Section** (lines 22-52):\n- Canvas for video/image preview\n- Playback controls: Skip Backward, Play/Pause, Skip Forward\n\n**Media Toolbar** (lines 55-63):\n- Appears when item selected or clipboard has content\n- Shows only when `hasSelectedItem()` or `hasClipboardItem()`\n- Contains: **Copy**, **Trim**, **Paste** buttons\n- Located absolutely at bottom-left of timeline\n\n**Timeline Ruler** (lines 67-103):\n- Fixed header, sticky on scroll\n- Contains: **Add Track**, **Zoom Out**, **Zoom In** buttons (left side)\n- Shows time markers and playhead (red line with drag handle)\n\n**Track Headers** (lines 109-126):\n- Per-track controls: **Add Media** (+), **Remove Track** (trash)\n- Track name display\n\n### 5. EXISTING UNDO/REDO & HISTORY MANAGEMENT\n\n**Current Status**: NO undo/redo functionality exists\n- Only persistence: LocalStorage saves entire state automatically\n- No history/version tracking\n- No transaction management\n- No undo/redo buttons in UI\n- `clipboardItem` signal for copy/paste (basic copy mechanism only)\n\n**Current Persistence Model:**\n```typescript\n// TimelineStorageService\nsaveState(state: TimelineState): void {\n localStorage.setItem('video-timeline-state', JSON.stringify(state));\n}\n\nloadState(): TimelineState | null {\n return JSON.parse(localStorage.getItem('video-timeline-state'));\n}\n```\n\n### 6. CONTRIBUTING GUIDELINES & CODE STYLE\n\n**From README.md:**\n- Follow existing code style and conventions\n- Write tests for new features (Jasmine/Karma)\n- Ensure all tests pass before submitting\n- Update documentation as needed\n\n**Code Quality Standards:**\n- **Prettier** configured for formatting:\n - Print width: 100 characters\n - Single quotes enabled\n - Angular HTML parser for templates\n- **TypeScript**: Strict mode enabled, target ES2022\n- **Angular CLI** version 20.3.8\n- Tests located alongside components: `*.spec.ts` files\n\n**Dependency Injection:**\n- Services use `@Injectable({ providedIn: 'root' })` (tree-shakeable)\n- Injected via constructor or `inject()` function\n- `ApplicationConfig` in `app.config.ts` provides global setup\n\n**Patterns Used:**\n- Standalone components (no NgModule)\n- Angular signals for state (new Angular approach)\n- Computed properties for derived state\n- Effects for side effects (auto-saving)\n- New control flow syntax (@if, @for, @switch)\n\n### KEY FILES FOR UNDO/REDO IMPLEMENTATION\n\n1. **State Model**: `/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/models/timeline.models.ts`\n2. **Main Component**: `/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts` (1316 lines)\n3. **Storage Service**: `/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/services/timeline-storage.service.ts`\n4. **Notifications**: `/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/notifications/notifications.component.ts` (UI pattern)\n5. **Toolbar HTML**: `/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.html` (lines 1-20 for header)\n\n### IMPLEMENTATION RECOMMENDATIONS\n\n**For Undo/Redo Feature:**\n1. **History Service** needed - maintains array of state snapshots\n2. **Commands Pattern** - each state-changing method could create history entry\n3. **UI Placement** - Add undo/redo buttons to header toolbar (lines 5-18 in timeline.component.html)\n4. **Maximum History** - Consider limiting to last 50-100 snapshots to prevent memory issues\n5. **Keyboard Shortcuts** - Ctrl+Z / Ctrl+Y (Cmd+Z / Cmd+Y on Mac)\n6. **Integration Points** - Hook into all `state.update()` calls to capture history\n7. **Notification** - Show \"Undo: [action name]\" toast when undoing (use existing NotificationsComponent)"}]}]},"parent_tool_use_id":null,"session_id":"c3de30fe-a5bd-49e6-8052-bb51f10fe87f","uuid":"c4861b73-7cef-46fb-a0fe-32a7dd786ec8","tool_use_result":{"status":"completed","prompt":"Explore the video-timeline codebase to understand:\n1. The overall project structure and tech stack\n2. Where the timeline state is managed\n3. How changes to the timeline are currently handled\n4. The UI components and where buttons are rendered (especially header/top section)\n5. Any existing undo/redo functionality or history management\n6. Contributing guidelines or code style conventions\n\nThis is for implementing an undo/redo feature. Return a comprehensive summary of your findings.","agentId":"1025333a","content":[{"type":"text","text":"Perfect! Now I have a comprehensive understanding of the codebase. Let me create a detailed summary report:\n\n## Comprehensive Video-Timeline Codebase Analysis\n\nBased on my exploration of the video-timeline codebase, here's a detailed summary of the findings:\n\n### 1. OVERALL PROJECT STRUCTURE & TECH STACK\n\n**Technology Stack:**\n- **Framework**: Angular 20.3 (standalone components, signals for state management)\n- **Language**: TypeScript 5.9 (strict mode)\n- **Styling**: Tailwind CSS 4.1 + custom CSS\n- **Icons**: Bootstrap Icons 1.13\n- **Reactive Programming**: RxJS 7.8\n- **Testing**: Jasmine 5.9 + Karma 6.4\n\n**Project Structure:**\n```\nvideo-timeline/\n├── src/app/\n│ ├── components/\n│ │ ├── timeline/ (main timeline view)\n│ │ ├── media-library/ (media selection modal)\n│ │ ├── media-toolbar/ (trim, copy, paste buttons)\n│ │ └── notifications/ (toast notifications)\n│ ├── services/\n│ │ ├── timeline-storage.service.ts (LocalStorage persistence)\n│ │ ├── timeline-drag-drop.service.ts (drag/drop & positioning logic)\n│ │ └── playback.service.ts (video/audio playback)\n│ ├── models/\n│ │ └── timeline.models.ts (TypeScript interfaces)\n│ ├── app.ts (root component)\n│ ├── app.config.ts (dependency injection setup)\n│ └── app.routes.ts (routing config)\n└── src/\n └── styles.css (global styles)\n```\n\n### 2. TIMELINE STATE MANAGEMENT\n\n**State Definition** (from `timeline.models.ts`):\n```typescript\ninterface TimelineState {\n tracks: Track[];\n playheadPosition: number; // milliseconds\n zoomLevel: number; // pixels per second\n totalDuration: number; // milliseconds\n selectedItemId: string | null;\n}\n\ninterface Track {\n id: string;\n name: string;\n order: number;\n items: MediaItem[];\n}\n\ninterface MediaItem {\n id: string;\n type: MediaType; // VIDEO, AUDIO, IMAGE\n startTime: number; // position on timeline (ms)\n duration: number; // duration shown on timeline (ms)\n mediaStartTime?: number; // offset into source media (ms)\n maxDuration?: number; // max duration for audio/video\n trackId: string;\n name?: string;\n url?: string;\n isPlaceholder?: boolean;\n}\n```\n\n**State Management Approach** (in `timeline.component.ts`):\n- Uses Angular **signal()** for reactive state: `readonly state = signal<TimelineState>(...)`\n- **Auto-saves** to LocalStorage via effect: `effect(() => { this.storageService.saveState(this.state()); })`\n- **Loads** saved state on init from `TimelineStorageService`\n- Uses **signal.update()** for immutable state changes\n- Direct state mutations use spread operators for immutability\n\n### 3. HOW CHANGES TO TIMELINE ARE CURRENTLY HANDLED\n\n**State Modification Pattern:**\nAll changes follow this immutable pattern:\n```typescript\nthis.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t => { /* modifications */ })\n}));\n```\n\n**Key Operations:**\n1. **Track Management**: `addTrack()`, `removeTrack()` - adds/removes tracks from state\n2. **Media Items**: `addMediaItem()`, `removeMediaItem()` - adds/removes items on tracks\n3. **Drag & Drop**: `onTrackPointerMove()` - updates item position and track placement\n4. **Resizing**: `handleResize()` - modifies item duration and mediaStartTime\n5. **Selection**: `selectMediaItem()`, `deselectMediaItem()` - updates selectedItemId\n6. **Editing**: `trimSelectedMedia()`, `copySelectedMedia()`, `pasteMedia()` - complex operations\n7. **Playhead**: `onRulerPointerDown()`, `onDocumentPointerMove()` - updates playheadPosition\n8. **Zoom**: `zoomIn()`, `zoomOut()` - modifies zoomLevel\n\n**Services involved:**\n- `TimelineStorageService`: Persists state to LocalStorage (key: 'video-timeline-state')\n- `TimelineDragDropService`: Calculates valid positions, snap targets, resize bounds\n- `PlaybackService`: Manages video/audio playback and canvas rendering\n\n### 4. UI COMPONENTS & BUTTONS LOCATION\n\n**Header/Top Section** (lines 2-19 of timeline.component.html):\n```\n┌─────────────────────────────────────────────────────┐\n│ VideoEditor [New Project] [00:00 / 2:00] │\n└─────────────────────────────────────────────────────┘\n```\n- **\"New project\"** button - clears timeline & LocalStorage\n- **Duration display** - clickable to edit total duration\n\n**Video Preview Section** (lines 22-52):\n- Canvas for video/image preview\n- Playback controls: Skip Backward, Play/Pause, Skip Forward\n\n**Media Toolbar** (lines 55-63):\n- Appears when item selected or clipboard has content\n- Shows only when `hasSelectedItem()` or `hasClipboardItem()`\n- Contains: **Copy**, **Trim**, **Paste** buttons\n- Located absolutely at bottom-left of timeline\n\n**Timeline Ruler** (lines 67-103):\n- Fixed header, sticky on scroll\n- Contains: **Add Track**, **Zoom Out**, **Zoom In** buttons (left side)\n- Shows time markers and playhead (red line with drag handle)\n\n**Track Headers** (lines 109-126):\n- Per-track controls: **Add Media** (+), **Remove Track** (trash)\n- Track name display\n\n### 5. EXISTING UNDO/REDO & HISTORY MANAGEMENT\n\n**Current Status**: NO undo/redo functionality exists\n- Only persistence: LocalStorage saves entire state automatically\n- No history/version tracking\n- No transaction management\n- No undo/redo buttons in UI\n- `clipboardItem` signal for copy/paste (basic copy mechanism only)\n\n**Current Persistence Model:**\n```typescript\n// TimelineStorageService\nsaveState(state: TimelineState): void {\n localStorage.setItem('video-timeline-state', JSON.stringify(state));\n}\n\nloadState(): TimelineState | null {\n return JSON.parse(localStorage.getItem('video-timeline-state'));\n}\n```\n\n### 6. CONTRIBUTING GUIDELINES & CODE STYLE\n\n**From README.md:**\n- Follow existing code style and conventions\n- Write tests for new features (Jasmine/Karma)\n- Ensure all tests pass before submitting\n- Update documentation as needed\n\n**Code Quality Standards:**\n- **Prettier** configured for formatting:\n - Print width: 100 characters\n - Single quotes enabled\n - Angular HTML parser for templates\n- **TypeScript**: Strict mode enabled, target ES2022\n- **Angular CLI** version 20.3.8\n- Tests located alongside components: `*.spec.ts` files\n\n**Dependency Injection:**\n- Services use `@Injectable({ providedIn: 'root' })` (tree-shakeable)\n- Injected via constructor or `inject()` function\n- `ApplicationConfig` in `app.config.ts` provides global setup\n\n**Patterns Used:**\n- Standalone components (no NgModule)\n- Angular signals for state (new Angular approach)\n- Computed properties for derived state\n- Effects for side effects (auto-saving)\n- New control flow syntax (@if, @for, @switch)\n\n### KEY FILES FOR UNDO/REDO IMPLEMENTATION\n\n1. **State Model**: `/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/models/timeline.models.ts`\n2. **Main Component**: `/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts` (1316 lines)\n3. **Storage Service**: `/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/services/timeline-storage.service.ts`\n4. **Notifications**: `/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/notifications/notifications.component.ts` (UI pattern)\n5. **Toolbar HTML**: `/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.html` (lines 1-20 for header)\n\n### IMPLEMENTATION RECOMMENDATIONS\n\n**For Undo/Redo Feature:**\n1. **History Service** needed - maintains array of state snapshots\n2. **Commands Pattern** - each state-changing method could create history entry\n3. **UI Placement** - Add undo/redo buttons to header toolbar (lines 5-18 in timeline.component.html)\n4. **Maximum History** - Consider limiting to last 50-100 snapshots to prevent memory issues\n5. **Keyboard Shortcuts** - Ctrl+Z / Ctrl+Y (Cmd+Z / Cmd+Y on Mac)\n6. **Integration Points** - Hook into all `state.update()` calls to capture history\n7. **Notification** - Show \"Undo: [action name]\" toast when undoing (use existing NotificationsComponent)"}],"totalDurationMs":59196,"totalTokens":59578,"totalToolUseCount":32,"usage":{"input_tokens":6,"cache_creation_input_tokens":1516,"cache_read_input_tokens":55707,"cache_creation":{"ephemeral_5m_input_tokens":1516,"ephemeral_1h_input_tokens":0},"output_tokens":2349,"service_tier":"standard"}}}
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"content": " 1→export enum MediaType {\n 2→ VIDEO = 'video',\n 3→ AUDIO = 'audio',\n 4→ IMAGE = 'image'\n 5→}\n 6→\n 7→export interface MediaItem {\n 8→ id: string;\n 9→ type: MediaType;\n 10→ startTime: number; // milliseconds - position on timeline\n 11→ duration: number; // milliseconds - duration shown on timeline\n 12→ mediaStartTime?: number; // milliseconds - offset into source media (default: 0)\n 13→ maxDuration?: number; // milliseconds - maximum duration for audio/video placeholders\n 14→ trackId: string;\n 15→ name?: string;\n 16→ url?: string; // URL to the actual media file\n 17→ isPlaceholder?: boolean;\n 18→}\n 19→\n 20→export interface Track {\n 21→ id: string;\n 22→ name: string;\n 23→ order: number;\n 24→ items: MediaItem[];\n 25→}\n 26→\n 27→export interface TimelineState {\n 28→ tracks: Track[];\n 29→ playheadPosition: number; // milliseconds\n 30→ zoomLevel: number; // pixels per millisecond\n 31→ totalDuration: number; // milliseconds\n 32→ selectedItemId: string | null; // ID of selected media item\n 33→}\n 34→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"
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"content": " 1→import { Injectable } from '@angular/core';\n 2→import { TimelineState } from '../models/timeline.models';\n 3→\n 4→@Injectable({\n 5→ providedIn: 'root'\n 6→})\n 7→export class Timel************rvice {\n 8→ private readonly STORAGE_KEY = 'video-timeline-state';\n 9→\n 10→ /**\n 11→ * Save timeline state to LocalStorage\n 12→ */\n 13→ saveState(state: TimelineState): void {\n 14→ try {\n 15→ const serialized = JSON.stringify(state);\n 16→ localStorage.setItem(this.STORAGE_KEY, serialized);\n 17→ } catch (error) {\n 18→ console.error('Failed to save timeline state to LocalStorage:', error);\n 19→ }\n 20→ }\n 21→\n 22→ /**\n 23→ * Load timeline state from LocalStorage\n 24→ * Returns null if no saved state exists or if loading fails\n 25→ */\n 26→ loadState(): TimelineState | null {\n 27→ try {\n 28→ const serialized = localStorage.getItem(this.STORAGE_KEY);\n 29→ if (serialized) {\n 30→ return JSON.parse(serialized) as TimelineState;\n 31→ }\n 32→ return null;\n 33→ } catch (error) {\n 34→ console.error('Failed to load timeline state from LocalStorage:', error);\n 35→ return null;\n 36→ }\n 37→ }\n 38→\n 39→ /**\n 40→ * Clear timeline state from LocalStorage\n 41→ */\n 42→ clearState(): void {\n 43→ try {\n 44→ localStorage.removeItem(this.STORAGE_KEY);\n 45→ } catch (error) {\n 46→ console.error('Failed to clear timeline state from LocalStorage:', error);\n 47→ }\n 48→ }\n 49→\n 50→ /**\n 51→ * Check if saved state exists\n 52→ */\n 53→ hasSavedState(): boolean {\n 54→ return localStorage.getItem(this.STORAGE_KEY) !== null;\n 55→ }\n 56→}\n 57→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"
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"content": " 1→<div class=\"flex flex-col h-full bg-[#1e1e1e] text-gray-200 select-none\" (mouseup)=\"onPointerUp($event)\" (mousemove)=\"onDocumentPointerMove($event)\" (touchend)=\"onPointerUp($event)\" (touchmove)=\"onDocumentPointerMove($event)\">\n 2→ <!-- Toolbar -->\n 3→ <div class=\"flex justify-between items-center px-4 py-3 bg-[#252525] border-b border-[#3a3a3a]\">\n 4→ <h2 class=\"text-lg font-semibold m-0\">VideoEditor</h2>\n 5→ <div class=\"flex gap-4 items-center\">\n 6→ <button\n 7→ (click)=\"newProject()\"\n 8→ class=\"px-3 py-1.5 bg-[#3a3a3a] text-white border-none rounded cursor-pointer text-sm transition-colors hover:bg-[#4a4a4a] flex items-center gap-2\"\n 9→ title=\"Create new project (clears timeline and saved data)\">\n 10→ <i class=\"bi bi-file-earmark-plus\"></i>\n 11→ <span>New project</span>\n 12→ </button>\n 13→ <div class=\"font-mono text-sm px-3 py-1 bg-[#2a2a2a] rounded cursor-pointer hover:bg-[#3a3a3a] transition-colors\"\n 14→ (click)=\"openDurationEditor()\"\n 15→ title=\"Click to change total duration\">\n 16→ {{ formatTime(state().playheadPosition) }} / {{ formatTime(state().totalDuration) }}\n 17→ </div>\n 18→ </div>\n 19→ </div>\n 20→\n 21→ <!-- Video Preview Area -->\n 22→ <div class=\"flex justify-center items-center py-6 bg-[#252525] border-b border-[#3a3a3a]\">\n 23→ <div class=\"flex flex-col items-center gap-3\">\n 24→ <!-- Video Preview Canvas -->\n 25→ <div class=\"w-[640px] h-[360px] bg-[#1a1a1a] rounded-lg border border-[#3a3a3a] flex items-center justify-center overflow-hidden\">\n 26→ <canvas #previewCanvas\n 27→ [width]=\"PREVIEW_WIDTH\"\n 28→ [height]=\"PREVIEW_HEIGHT\"\n 29→ class=\"w-full h-full\">\n 30→ </canvas>\n 31→ </div>\n 32→\n 33→ <!-- Playback Controls -->\n 34→ <div class=\"flex gap-2 items-center\">\n 35→ <button (click)=\"skipBackward()\" class=\"px-3 py-2 bg-[#3a3a3a] text-white border-none rounded cursor-pointer text-base transition-colors hover:bg-[#4a4a4a] flex items-center gap-1.5\" title=\"Back 5 seconds\">\n 36→ <i class=\"bi bi-skip-backward-fill\"></i>\n 37→ <span class=\"text-xs\">5s</span>\n 38→ </button>\n 39→ <button (click)=\"togglePlayback()\" class=\"px-4 py-2 bg-blue-600 text-white border-none rounded cursor-pointer text-xl transition-colors hover:bg-blue-700\" [title]=\"isPlaying() ? 'Pause' : 'Play'\">\n 40→ @if (isPlaying()) {\n 41→ <i class=\"bi bi-pause-fill\"></i>\n 42→ } @else {\n 43→ <i class=\"bi bi-play-fill\"></i>\n 44→ }\n 45→ </button>\n 46→ <button (click)=\"skipForward()\" class=\"px-3 py-2 bg-[#3a3a3a] text-white border-none rounded cursor-pointer text-base transition-colors hover:bg-[#4a4a4a] flex items-center gap-1.5\" title=\"Forward 5 seconds\">\n 47→ <span class=\"text-xs\">5s</span>\n 48→ <i class=\"bi bi-skip-forward-fill\"></i>\n 49→ </button>\n 50→ </div>\n 51→ </div>\n 52→ </div>\n 53→\n 54→ <div class=\"relative\">\n 55→ <!-- Media Toolbar (positioned absolutely above timeline, aligned with left panel) -->\n 56→ <app-media-toolbar\n 57→ [isVisible]=\"hasSelectedItem()\"\n 58→ [hasClipboard]=\"hasClipboardItem()\"\n 59→ (trimMedia)=\"trimSelectedMedia()\"\n 60→ (copyMedia)=\"copySelectedMedia()\"\n 61→ (pasteMedia)=\"pasteMedia()\">\n 62→ </app-media-toolbar>\n 63→ </div>\n 64→ <!-- Timeline content wrapper with unified horizontal scrolling -->\n 65→ <div class=\"flex-1 flex flex-col overflow-y-auto overflow-x-auto relative\">\n 66→ <!-- Timeline Ruler (sticky to stay visible during vertical scroll) -->\n 67→ <div class=\"flex border-b border-[#3a3a3a] flex-shrink-0 sticky top-0 z-10 bg-[#2a2a2a] relative\">\n 68→ <!-- Control area to align with track headers -->\n 69→ <div class=\"min-w-[150px] bg-[#252525] border-r border-[#3a3a3a] flex justify-center items-center gap-1 p-2\">\n 70→ <button (click)=\"addTrack()\" class=\"px-2 py-1 text-white border-none rounded cursor-pointer text-sm opacity-70 transition-opacity hover:opacity-100\" title=\"Add track\">\n 71→ <i class=\"bi bi-plus-circle\"></i>\n 72→ </button>\n 73→ <button (click)=\"zoomOut()\" class=\"px-2 py-1 text-white border-none rounded cursor-pointer text-sm opacity-70 transition-opacity hover:opacity-100\" title=\"Zoom out\">\n 74→ <i class=\"bi bi-zoom-out\"></i>\n 75→ </button>\n 76→ <button (click)=\"zoomIn()\" class=\"px-2 py-1 text-white border-none rounded cursor-pointer text-sm opacity-70 transition-opacity hover:opacity-100\" title=\"Zoom in\">\n 77→ <i class=\"bi bi-zoom-in\"></i>\n 78→ </button>\n 79→ </div>\n 80→ <!-- Ruler content -->\n 81→ <div class=\"relative h-10 bg-[#2a2a2a] flex-1\">\n 82→ <div class=\"relative h-full min-w-full cursor-pointer\"\n 83→ [style.width.px]=\"timelineWidth()\"\n 84→ (mousedown)=\"onRulerPointerDown($event)\"\n 85→ (touchstart)=\"onRulerPointerDown($event)\"\n 86→ #timelineRuler>\n 87→ @for (marker of getTimeMarkers(); track marker.position) {\n 88→ <div class=\"absolute top-0 h-full\" [style.left.px]=\"marker.position\">\n 89→ <div class=\"w-px h-[60%] bg-[#4a4a4a]\"></div>\n 90→ <div class=\"text-[10px] text-gray-400 mt-0.5 whitespace-nowrap\">{{ marker.label }}</div>\n 91→ </div>\n 92→ }\n 93→ </div>\n 94→ <!-- Playhead - positioned in ruler container to stay visible -->\n 95→ <div class=\"absolute top-0 pointer-events-none z-[5]\"\n 96→ [style.left.px]=\"playheadPosition()\"\n 97→ (mousedown)=\"onPlayheadPointerDown($event)\"\n 98→ (touchstart)=\"onPlayheadPointerDown($event)\">\n 99→ <div class=\"absolute -left-1.5 top-4 w-3 h-3 bg-red-500 rounded-sm cursor-ew-resize pointer-events-auto\"></div>\n 100→ <div class=\"absolute left-0 top-4 w-0.5 bg-red-500 pointer-events-none\" [style.height.px]=\"timelineLineHeight()\"></div>\n 101→ </div>\n 102→ </div>\n 103→ </div>\n 104→\n 105→ <!-- Tracks -->\n 106→ <div class=\"flex-1\" [style.width.px]=\"timelineWidth() + TRACK_HEADER_WIDTH\">\n 107→ @for (track of state().tracks; track track.id; let i = $index) {\n 108→ <div class=\"flex border-b border-[#3a3a3a] min-h-[60px]\">\n 109→ <!-- Track header -->\n 110→ <div class=\"flex items-center justify-between min-w-[150px] p-2 bg-[#252525] border-r border-[#3a3a3a]\">\n 111→ <span class=\"text-sm font-medium\">Track {{ i + 1 }}</span>\n 112→ <div class=\"flex gap-1\">\n 113→ <button\n 114→ (click)=\"openMediaLibrary(track.id)\"\n 115→ class=\"p-1 text-base text-white border-none bg-transparent cursor-pointer transition-opacity opacity-70 hover:opacity-100\"\n 116→ title=\"Add media\">\n 117→ <i class=\"bi bi-plus-circle\"></i>\n 118→ </button>\n 119→ <button\n 120→ (click)=\"removeTrack(track.id)\"\n 121→ class=\"p-1 text-base text-red-500 border-none bg-transparent cursor-pointer transition-opacity opacity-70 hover:opacity-100\"\n 122→ title=\"Remove track\">\n 123→ <i class=\"bi bi-trash\"></i>\n 124→ </button>\n 125→ </div>\n 126→ </div>\n 127→\n 128→ <!-- Track timeline -->\n 129→ <div class=\"relative flex-1\">\n 130→ <div class=\"track relative bg-[#1a1a1a] min-h-[60px]\"\n 131→ (mousemove)=\"onTrackPointerMove($event, track)\"\n 132→ (mousedown)=\"onTrackPointerDown($event)\"\n 133→ (touchmove)=\"onTrackPointerMove($event, track)\"\n 134→ (touchstart)=\"onTrackPointerDown($event)\">\n 135→\n 136→ @for (item of track.items; track item.id) {\n 137→ <div class=\"media-item group absolute h-12 top-1.5 rounded border-2 border-transparent cursor-move flex items-center overflow-hidden transition-colors hover:border-white/30\"\n 138→ [class]=\"getMediaTypeClass(item.type)\"\n 139→ [class.selected]=\"isItemSelected(item.id)\"\n 140→ [style.left]=\"getItemStyle(item).left\"\n 141→ [style.width]=\"getItemStyle(item).width\"\n 142→ (mousedown)=\"onMediaItemPointerDown($event, item, track)\"\n 143→ (touchstart)=\"onMediaItemPointerDown($event, item, track)\">\n 144→\n 145→ <div class=\"resize-handle resize-handle-left absolute top-0 left-0 w-2 h-full cursor-ew-resize z-[2] bg-gradient-to-r from-white/30 to-transparent hover:bg-white/50\"></div>\n 146→\n 147→ <div class=\"flex items-center gap-1.5 px-2 flex-1 overflow-hidden\">\n 148→ <div class=\"text-lg flex-shrink-0\">\n 149→ @switch (item.type) {\n 150→ @case (MediaType.VIDEO) {\n 151→ <i class=\"bi bi-camera-video-fill\"></i>\n 152→ }\n 153→ @case (MediaType.AUDIO) {\n 154→ <i class=\"bi bi-volume-up-fill\"></i>\n 155→ }\n 156→ @case (MediaType.IMAGE) {\n 157→ <i class=\"bi bi-image-fill\"></i>\n 158→ }\n 159→ }\n 160→ </div>\n 161→ <div class=\"flex flex-col overflow-hidden flex-1\">\n 162→ <div class=\"text-[11px] font-medium whitespace-nowrap overflow-hidden text-ellipsis\">{{ item.name }}</div>\n 163→ <div class=\"text-[9px] text-white/60 font-mono\">\n 164→ @if (item.mediaStartTime && item.mediaStartTime > 0) {\n 165→ <span>{{ formatTime(item.mediaStartTime) }} - </span>\n 166→ }\n 167→ {{ formatTime(item.duration) }}\n 168→ </div>\n 169→ </div>\n 170→ </div>\n 171→\n 172→ <div class=\"resize-handle resize-handle-right absolute top-0 right-0 w-2 h-full cursor-ew-resize z-[2] bg-gradient-to-l from-white/30 to-transparent hover:bg-white/50\"></div>\n 173→\n 174→ <button\n 175→ class=\"media-item-delete absolute top-0.5 right-0.5 w-5 h-5 bg-black/60 text-white border-none rounded-full cursor-pointer text-xs leading-none p-0 hidden items-center justify-center hover:bg-red-600\"\n 176→ (click)=\"removeMediaItem(item.id, track.id); $event.stopPropagation()\">\n 177→ <i class=\"bi bi-x\"></i>\n 178→ </button>\n 179→ </div>\n 180→ }\n 181→ </div>\n 182→ </div>\n 183→ </div>\n 184→ }\n 185→ </div>\n 186→ </div>\n 187→\n 188→ <!-- Duration Editor Modal -->\n 189→ @if (showDurationEditor()) {\n 190→ <div class=\"fixed inset-0 bg-black/50 flex items-center justify-center z-[2000]\" (click)=\"closeDurationEditor()\">\n 191→ <div class=\"bg-[#2a2a2a] rounded-lg p-6 min-w-[400px] border border-[#3a3a3a]\" (click)=\"$event.stopPropagation()\">\n 192→ <h3 class=\"text-lg font-semibold mb-4 mt-0\">Total video duration</h3>\n 193→\n 194→ <div class=\"mb-4\">\n 195→ <label class=\"block text-sm text-gray-400 mb-2\">Duration (in seconds):</label>\n 196→ <input\n 197→ type=\"number\"\n 198→ min=\"1\"\n 199→ max=\"3600\"\n 200→ step=\"1\"\n 201→ [value]=\"state().totalDuration / 1000\"\n 202→ (input)=\"onDurationInputChange($event)\"\n 203→ class=\"w-full px-3 py-2 bg-[#1e1e1e] border border-[#3a3a3a] rounded text-white focus:outline-none focus:border-blue-500\"\n 204→ placeholder=\"60\">\n 205→ <div class=\"text-xs text-gray-500 mt-1\">Current value: {{ formatTime(state().totalDuration) }}</div>\n 206→ </div>\n 207→\n 208→ <div class=\"flex gap-2 justify-end\">\n 209→ <button\n 210→ (click)=\"closeDurationEditor()\"\n 211→ class=\"px-4 py-2 bg-[#3a3a3a] text-white border-none rounded cursor-pointer transition-colors hover:bg-[#4a4a4a]\">\n 212→ Cancel\n 213→ </button>\n 214→ <button\n 215→ (click)=\"saveDuration()\"\n 216→ class=\"px-4 py-2 bg-blue-600 text-white border-none rounded cursor-pointer transition-colors hover:bg-blue-700\">\n 217→ Save\n 218→ </button>\n 219→ </div>\n 220→ </div>\n 221→ </div>\n 222→ }\n 223→\n 224→ <!-- Media Library Modal -->\n 225→ @if (showMediaLibrary()) {\n 226→ <app-media-library\n 227→ (closeModal)=\"closeMediaLibrary()\"\n 228→ (selectMedia)=\"onMediaSelected($event)\">\n 229→ </app-media-library>\n 230→ }\n 231→\n 232→ <!-- Notifications -->\n 233→ <app-notifications #notifications></app-notifications>\n 234→</div>\n 235→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"
}
]
},
"parent_tool_use_id": null,
"session_id": "c3de30fe-a5bd-49e6-8052-bb51f10fe87f",
"uuid": "c8fdf369-56ef-4d4d-9332-5a369b64b4c0",
"tool_use_result": {
"type": "text",
"file": {
"filePath": "/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.html",
"content": "<div class=\"flex flex-col h-full bg-[#1e1e1e] text-gray-200 select-none\" (mouseup)=\"onPointerUp($event)\" (mousemove)=\"onDocumentPointerMove($event)\" (touchend)=\"onPointerUp($event)\" (touchmove)=\"onDocumentPointerMove($event)\">\n <!-- Toolbar -->\n <div class=\"flex justify-between items-center px-4 py-3 bg-[#252525] border-b border-[#3a3a3a]\">\n <h2 class=\"text-lg font-semibold m-0\">VideoEditor</h2>\n <div class=\"flex gap-4 items-center\">\n <button\n (click)=\"newProject()\"\n class=\"px-3 py-1.5 bg-[#3a3a3a] text-white border-none rounded cursor-pointer text-sm transition-colors hover:bg-[#4a4a4a] flex items-center gap-2\"\n title=\"Create new project (clears timeline and saved data)\">\n <i class=\"bi bi-file-earmark-plus\"></i>\n <span>New project</span>\n </button>\n <div class=\"font-mono text-sm px-3 py-1 bg-[#2a2a2a] rounded cursor-pointer hover:bg-[#3a3a3a] transition-colors\"\n (click)=\"openDurationEditor()\"\n title=\"Click to change total duration\">\n {{ formatTime(state().playheadPosition) }} / {{ formatTime(state().totalDuration) }}\n </div>\n </div>\n </div>\n\n <!-- Video Preview Area -->\n <div class=\"flex justify-center items-center py-6 bg-[#252525] border-b border-[#3a3a3a]\">\n <div class=\"flex flex-col items-center gap-3\">\n <!-- Video Preview Canvas -->\n <div class=\"w-[640px] h-[360px] bg-[#1a1a1a] rounded-lg border border-[#3a3a3a] flex items-center justify-center overflow-hidden\">\n <canvas #previewCanvas\n [width]=\"PREVIEW_WIDTH\"\n [height]=\"PREVIEW_HEIGHT\"\n class=\"w-full h-full\">\n </canvas>\n </div>\n\n <!-- Playback Controls -->\n <div class=\"flex gap-2 items-center\">\n <button (click)=\"skipBackward()\" class=\"px-3 py-2 bg-[#3a3a3a] text-white border-none rounded cursor-pointer text-base transition-colors hover:bg-[#4a4a4a] flex items-center gap-1.5\" title=\"Back 5 seconds\">\n <i class=\"bi bi-skip-backward-fill\"></i>\n <span class=\"text-xs\">5s</span>\n </button>\n <button (click)=\"togglePlayback()\" class=\"px-4 py-2 bg-blue-600 text-white border-none rounded cursor-pointer text-xl transition-colors hover:bg-blue-700\" [title]=\"isPlaying() ? 'Pause' : 'Play'\">\n @if (isPlaying()) {\n <i class=\"bi bi-pause-fill\"></i>\n } @else {\n <i class=\"bi bi-play-fill\"></i>\n }\n </button>\n <button (click)=\"skipForward()\" class=\"px-3 py-2 bg-[#3a3a3a] text-white border-none rounded cursor-pointer text-base transition-colors hover:bg-[#4a4a4a] flex items-center gap-1.5\" title=\"Forward 5 seconds\">\n <span class=\"text-xs\">5s</span>\n <i class=\"bi bi-skip-forward-fill\"></i>\n </button>\n </div>\n </div>\n </div>\n\n <div class=\"relative\">\n <!-- Media Toolbar (positioned absolutely above timeline, aligned with left panel) -->\n <app-media-toolbar\n [isVisible]=\"hasSelectedItem()\"\n [hasClipboard]=\"hasClipboardItem()\"\n (trimMedia)=\"trimSelectedMedia()\"\n (copyMedia)=\"copySelectedMedia()\"\n (pasteMedia)=\"pasteMedia()\">\n </app-media-toolbar>\n </div>\n <!-- Timeline content wrapper with unified horizontal scrolling -->\n <div class=\"flex-1 flex flex-col overflow-y-auto overflow-x-auto relative\">\n <!-- Timeline Ruler (sticky to stay visible during vertical scroll) -->\n <div class=\"flex border-b border-[#3a3a3a] flex-shrink-0 sticky top-0 z-10 bg-[#2a2a2a] relative\">\n <!-- Control area to align with track headers -->\n <div class=\"min-w-[150px] bg-[#252525] border-r border-[#3a3a3a] flex justify-center items-center gap-1 p-2\">\n <button (click)=\"addTrack()\" class=\"px-2 py-1 text-white border-none rounded cursor-pointer text-sm opacity-70 transition-opacity hover:opacity-100\" title=\"Add track\">\n <i class=\"bi bi-plus-circle\"></i>\n </button>\n <button (click)=\"zoomOut()\" class=\"px-2 py-1 text-white border-none rounded cursor-pointer text-sm opacity-70 transition-opacity hover:opacity-100\" title=\"Zoom out\">\n <i class=\"bi bi-zoom-out\"></i>\n </button>\n <button (click)=\"zoomIn()\" class=\"px-2 py-1 text-white border-none rounded cursor-pointer text-sm opacity-70 transition-opacity hover:opacity-100\" title=\"Zoom in\">\n <i class=\"bi bi-zoom-in\"></i>\n </button>\n </div>\n <!-- Ruler content -->\n <div class=\"relative h-10 bg-[#2a2a2a] flex-1\">\n <div class=\"relative h-full min-w-full cursor-pointer\"\n [style.width.px]=\"timelineWidth()\"\n (mousedown)=\"onRulerPointerDown($event)\"\n (touchstart)=\"onRulerPointerDown($event)\"\n #timelineRuler>\n @for (marker of getTimeMarkers(); track marker.position) {\n <div class=\"absolute top-0 h-full\" [style.left.px]=\"marker.position\">\n <div class=\"w-px h-[60%] bg-[#4a4a4a]\"></div>\n <div class=\"text-[10px] text-gray-400 mt-0.5 whitespace-nowrap\">{{ marker.label }}</div>\n </div>\n }\n </div>\n <!-- Playhead - positioned in ruler container to stay visible -->\n <div class=\"absolute top-0 pointer-events-none z-[5]\"\n [style.left.px]=\"playheadPosition()\"\n (mousedown)=\"onPlayheadPointerDown($event)\"\n (touchstart)=\"onPlayheadPointerDown($event)\">\n <div class=\"absolute -left-1.5 top-4 w-3 h-3 bg-red-500 rounded-sm cursor-ew-resize pointer-events-auto\"></div>\n <div class=\"absolute left-0 top-4 w-0.5 bg-red-500 pointer-events-none\" [style.height.px]=\"timelineLineHeight()\"></div>\n </div>\n </div>\n </div>\n\n <!-- Tracks -->\n <div class=\"flex-1\" [style.width.px]=\"timelineWidth() + TRACK_HEADER_WIDTH\">\n @for (track of state().tracks; track track.id; let i = $index) {\n <div class=\"flex border-b border-[#3a3a3a] min-h-[60px]\">\n <!-- Track header -->\n <div class=\"flex items-center justify-between min-w-[150px] p-2 bg-[#252525] border-r border-[#3a3a3a]\">\n <span class=\"text-sm font-medium\">Track {{ i + 1 }}</span>\n <div class=\"flex gap-1\">\n <button\n (click)=\"openMediaLibrary(track.id)\"\n class=\"p-1 text-base text-white border-none bg-transparent cursor-pointer transition-opacity opacity-70 hover:opacity-100\"\n title=\"Add media\">\n <i class=\"bi bi-plus-circle\"></i>\n </button>\n <button\n (click)=\"removeTrack(track.id)\"\n class=\"p-1 text-base text-red-500 border-none bg-transparent cursor-pointer transition-opacity opacity-70 hover:opacity-100\"\n title=\"Remove track\">\n <i class=\"bi bi-trash\"></i>\n </button>\n </div>\n </div>\n\n <!-- Track timeline -->\n <div class=\"relative flex-1\">\n <div class=\"track relative bg-[#1a1a1a] min-h-[60px]\"\n (mousemove)=\"onTrackPointerMove($event, track)\"\n (mousedown)=\"onTrackPointerDown($event)\"\n (touchmove)=\"onTrackPointerMove($event, track)\"\n (touchstart)=\"onTrackPointerDown($event)\">\n\n @for (item of track.items; track item.id) {\n <div class=\"media-item group absolute h-12 top-1.5 rounded border-2 border-transparent cursor-move flex items-center overflow-hidden transition-colors hover:border-white/30\"\n [class]=\"getMediaTypeClass(item.type)\"\n [class.selected]=\"isItemSelected(item.id)\"\n [style.left]=\"getItemStyle(item).left\"\n [style.width]=\"getItemStyle(item).width\"\n (mousedown)=\"onMediaItemPointerDown($event, item, track)\"\n (touchstart)=\"onMediaItemPointerDown($event, item, track)\">\n\n <div class=\"resize-handle resize-handle-left absolute top-0 left-0 w-2 h-full cursor-ew-resize z-[2] bg-gradient-to-r from-white/30 to-transparent hover:bg-white/50\"></div>\n\n <div class=\"flex items-center gap-1.5 px-2 flex-1 overflow-hidden\">\n <div class=\"text-lg flex-shrink-0\">\n @switch (item.type) {\n @case (MediaType.VIDEO) {\n <i class=\"bi bi-camera-video-fill\"></i>\n }\n @case (MediaType.AUDIO) {\n <i class=\"bi bi-volume-up-fill\"></i>\n }\n @case (MediaType.IMAGE) {\n <i class=\"bi bi-image-fill\"></i>\n }\n }\n </div>\n <div class=\"flex flex-col overflow-hidden flex-1\">\n <div class=\"text-[11px] font-medium whitespace-nowrap overflow-hidden text-ellipsis\">{{ item.name }}</div>\n <div class=\"text-[9px] text-white/60 font-mono\">\n @if (item.mediaStartTime && item.mediaStartTime > 0) {\n <span>{{ formatTime(item.mediaStartTime) }} - </span>\n }\n {{ formatTime(item.duration) }}\n </div>\n </div>\n </div>\n\n <div class=\"resize-handle resize-handle-right absolute top-0 right-0 w-2 h-full cursor-ew-resize z-[2] bg-gradient-to-l from-white/30 to-transparent hover:bg-white/50\"></div>\n\n <button\n class=\"media-item-delete absolute top-0.5 right-0.5 w-5 h-5 bg-black/60 text-white border-none rounded-full cursor-pointer text-xs leading-none p-0 hidden items-center justify-center hover:bg-red-600\"\n (click)=\"removeMediaItem(item.id, track.id); $event.stopPropagation()\">\n <i class=\"bi bi-x\"></i>\n </button>\n </div>\n }\n </div>\n </div>\n </div>\n }\n </div>\n </div>\n\n <!-- Duration Editor Modal -->\n @if (showDurationEditor()) {\n <div class=\"fixed inset-0 bg-black/50 flex items-center justify-center z-[2000]\" (click)=\"closeDurationEditor()\">\n <div class=\"bg-[#2a2a2a] rounded-lg p-6 min-w-[400px] border border-[#3a3a3a]\" (click)=\"$event.stopPropagation()\">\n <h3 class=\"text-lg font-semibold mb-4 mt-0\">Total video duration</h3>\n\n <div class=\"mb-4\">\n <label class=\"block text-sm text-gray-400 mb-2\">Duration (in seconds):</label>\n <input\n type=\"number\"\n min=\"1\"\n max=\"3600\"\n step=\"1\"\n [value]=\"state().totalDuration / 1000\"\n (input)=\"onDurationInputChange($event)\"\n class=\"w-full px-3 py-2 bg-[#1e1e1e] border border-[#3a3a3a] rounded text-white focus:outline-none focus:border-blue-500\"\n placeholder=\"60\">\n <div class=\"text-xs text-gray-500 mt-1\">Current value: {{ formatTime(state().totalDuration) }}</div>\n </div>\n\n <div class=\"flex gap-2 justify-end\">\n <button\n (click)=\"closeDurationEditor()\"\n class=\"px-4 py-2 bg-[#3a3a3a] text-white border-none rounded cursor-pointer transition-colors hover:bg-[#4a4a4a]\">\n Cancel\n </button>\n <button\n (click)=\"saveDuration()\"\n class=\"px-4 py-2 bg-blue-600 text-white border-none rounded cursor-pointer transition-colors hover:bg-blue-700\">\n Save\n </button>\n </div>\n </div>\n </div>\n }\n\n <!-- Media Library Modal -->\n @if (showMediaLibrary()) {\n <app-media-library\n (closeModal)=\"closeMediaLibrary()\"\n (selectMedia)=\"onMediaSelected($event)\">\n </app-media-library>\n }\n\n <!-- Notifications -->\n <app-notifications #notifications></app-notifications>\n</div>\n",
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[2025-12-22T21:46:21.469Z] [INFO] {
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"id": "msg_01FKQ55ZRMUaHUaB7NAMhSiL",
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"content": [
{
"type": "text",
"text": "Now let me read the timeline component TypeScript file to understand how state changes are made:"
}
],
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[2025-12-22T21:46:22.599Z] [INFO] {
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[2025-12-22T21:46:22.881Z] [INFO] {"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01JKoCM7wG1cnG6r6n3CDEND","type":"tool_result","content":" 1→import { Component, signal, computed, ViewChild, ElementRef, AfterViewInit, OnDestroy, effect } from '@angular/core';\n 2→import { CommonModule } from '@angular/common';\n 3→import { MediaType, MediaItem, Track, TimelineState } from '../../models/timeline.models';\n 4→import { MediaLibraryComponent, MediaLibraryItem } from '../media-library/media-library.component';\n 5→import { Media***********onent } from '../media-toolbar/media-toolbar.component';\n 6→import { Notif************onent } from '../notifications/notifications.component';\n 7→import { Timel*************rvice } from '../../services/timeline-drag-drop.service';\n 8→import { PlaybackService } from '../../services/playback.service';\n 9→import { Timel************rvice } from '../../services/timeline-storage.service';\n 10→\n 11→@Component({\n 12→ selector: 'app-timeline',\n 13→ standalone: true,\n 14→ imports: [CommonModule, MediaLibraryComponent, MediaToolbarComponent, NotificationsComponent],\n 15→ templateUrl: './timeline.component.html',\n 16→ styleUrl: './timeline.component.css'\n 17→})\n 18→export class TimelineComponent implements AfterViewInit, OnDestroy {\n 19→ // Zoom levels: pixels per second\n 20→ private readonly MIN_ZOOM = 10;\n 21→ private readonly MAX_ZOOM = 200;\n 22→ private readonly ZOOM_STEP = 20;\n 23→ readonly TRACK_HEADER_WIDTH = 150; // Width of track header in pixels\n 24→ private readonly SNAP_PROXIMITY_MS = 500; // Snap to item if playhead is within 500ms\n 25→ private readonly MIN_ITEM_DURATION = 100; // Minimum item duration in milliseconds\n 26→\n 27→ // Canvas dimensions for preview\n 28→ readonly PREVIEW_WIDTH = 640;\n 29→ readonly PREVIEW_HEIGHT = 360;\n 30→\n 31→ // View references\n 32→ @ViewChild('timelineRuler') timelineRuler?: ElementRef<HTMLElement>;\n 33→ @ViewChild('notifications') notificationsComponent?: NotificationsComponent;\n 34→ @ViewChild('previewCanvas') previewCanvas?: ElementRef<HTMLCanvasElement>;\n 35→\n 36→ // Timeline state\n 37→ readonly state = signal<TimelineState>({\n 38→ tracks: [\n 39→ { id: '1', name: 'Track 1', order: 0, items: [] },\n 40→ { id: '2', name: 'Track 2', order: 1, items: [] }\n 41→ ],\n 42→ playheadPosition: 0,\n 43→ zoomLevel: 50, // pixels per second\n 44→ totalDuration: 120000, // 120 seconds in milliseconds\n 45→ selectedItemId: null\n 46→ });\n 47→\n 48→ // Computed values\n 49→ readonly pixel**********econd = computed(() => {\n 50→ return this.state().zoomLevel / 1000;\n 51→ });\n 52→\n 53→ readonly timelineWidth = computed(() => {\n 54→ const state = this.state();\n 55→ // Calculate the maximum end time across all tracks\n 56→ let maxEndTime = state.totalDuration;\n 57→\n 58→ for (const track of state.tracks) {\n 59→ for (const item of track.items) {\n 60→ const itemEndTime = item.startTime + item.duration;\n 61→ if (itemEndTime > maxEndTime) {\n 62→ maxEndTime = itemEndTime;\n 63→ }\n 64→ }\n 65→ }\n 66→\n 67→ return maxEndTime * this.pixelsPerMillisecond();\n 68→ });\n 69→\n 70→ readonly timelineLineHeight = computed(() => {\n 71→ const state = this.state();\n 72→ return state.tracks.length * 60 + 32;\n 73→ });\n 74→\n 75→ readonly playheadPosition = computed(() => {\n 76→ return this.state().playheadPosition * this.pixelsPerMillisecond();\n 77→ });\n 78→\n 79→ readonly playh************ition = computed(() => {\n 80→ return this.playheadPosition() + this.TRACK_HEADER_WIDTH;\n 81→ });\n 82→\n 83→ // Computed: whether a media item is currently selected\n 84→ readonly hasSelectedItem = computed(() => {\n 85→ return this.state().selectedItemId !== null;\n 86→ });\n 87→\n 88→ // Dragging state\n 89→ private draggedItem: MediaItem | null = null;\n 90→ private draggedItemOriginalTrackId: string | null = null;\n 91→ private dragOffsetTime: number = 0; // Offset in milliseconds from item start to cursor position\n 92→ private isDraggingPlayhead = false;\n 93→ private isDraggingFromRuler = false;\n 94→ private resizingItem: { item: MediaItem; edge: 'left' | 'right' } | null = null;\n 95→ private mouseDownPosition: { x: number; y: number } | null = null; // Track mouse down position for click detection\n 96→\n 97→ // Video preview state\n 98→ readonly isPlaying = signal<boolean>(false);\n 99→\n 100→ // Duration editor state\n 101→ readonly showDurationEditor = signal<boolean>(false);\n 102→ private editedDuration: number = 120; // Duration in seconds\n 103→\n 104→ // Media library state\n 105→ readonly showMediaLibrary = signal<boolean>(false);\n 106→ private mediaLibraryTargetTrackId: string | null = null;\n 107→\n 108→ // Clipboard state for copy/paste functionality\n 109→ private readonly clipboardItem = signal<MediaItem | null>(null);\n 110→ private readonly clipb************ackId = signal<string | null>(null);\n 111→\n 112→ // Computed: whether a media item is in clipboard\n 113→ readonly hasClipboardItem = computed(() => {\n 114→ return this.clipboardItem() !== null;\n 115→ });\n 116→\n 117→ // Render loop ID for cleanup\n 118→ private renderLoopId: number | null = null;\n 119→\n 120→ constructor(\n 121→ private dragDropService: TimelineDragDropService,\n 122→ public playbackService: PlaybackService,\n 123→ private storageService: TimelineStorageService\n 124→ ) {\n 125→ // Load saved state from LocalStorage on initialization\n 126→ const savedState = this.storageService.loadState();\n 127→ if (savedState) {\n 128→ this.state.set(savedState);\n 129→ }\n 130→\n 131→ // Effect to sync playhead position from PlaybackService during playback\n 132→ effect(() => {\n 133→ if (this.playbackService.isPlaying()) {\n 134→ const position = this.playbackService.playheadPosition();\n 135→ this.state.update(s => ({\n 136→ ...s,\n 137→ playheadPosition: position\n 138→ }));\n 139→ }\n 140→ });\n 141→\n 142→ // Effect to auto-save timeline state to LocalStorage on any change\n 143→ effect(() => {\n 144→ const currentState = this.state();\n 145→ this.storageService.saveState(currentState);\n 146→ });\n 147→ }\n 148→\n 149→ ngAfterViewInit(): void {\n 150→ // Initialize canvas for preview rendering\n 151→ if (this.previewCanvas) {\n 152→ this.playbackService.setCanvas(this.previewCanvas.nativeElement);\n 153→ }\n 154→\n 155→ // Start continuous render loop for preview (renders current frame even when paused)\n 156→ this.startRenderLoop();\n 157→\n 158→ // Synchronize media and render initial frame if state was loaded from LocalStorage\n 159→ const currentState = this.state();\n 160→ if (currentState.tracks.length > 0) {\n 161→ this.playbackService.seek(currentState.tracks, currentState.playheadPosition);\n 162→ }\n 163→ }\n 164→\n 165→ ngOnDestroy(): void {\n 166→ // Clean up render loop\n 167→ if (this.renderLoopId !== null) {\n 168→ cancelAnimationFrame(this.renderLoopId);\n 169→ this.renderLoopId = null;\n 170→ }\n 171→\n 172→ // Stop playback\n 173→ this.playbackService.stop();\n 174→ }\n 175→\n 176→ /**\n 177→ * Continuous render loop for preview canvas.\n 178→ * Keeps rendering even when paused so seeking updates the preview.\n 179→ */\n 180→ private startRenderLoop(): void {\n 181→ const render = () => {\n 182→ // Only render if we have active media and are not playing\n 183→ // (PlaybackService handles rendering during playback)\n 184→ if (!this.playbackService.isPlaying()) {\n 185→ this.playbackService.renderCurrentFrame();\n 186→ }\n 187→ this.renderLoopId = requestAnimationFrame(render);\n 188→ };\n 189→ this.renderLoopId = requestAnimationFrame(render);\n 190→ }\n 191→\n 192→ // Track management\n 193→ addTrack(): void {\n 194→ const currentState = this.state();\n 195→ const newTrack: Track = {\n 196→ id: `track-${Date.now()}`,\n 197→ name: `Track ${currentState.tracks.length + 1}`,\n 198→ order: currentState.tracks.length,\n 199→ items: []\n 200→ };\n 201→\n 202→ this.state.update(s => ({\n 203→ ...s,\n 204→ tracks: [...s.tracks, newTrack]\n 205→ }));\n 206→\n 207→ // Show notification for adding track\n 208→ this.notificationsComponent?.showNotification(\n 209→ `Track \"${newTrack.name}\" added.`,\n 210→ 'success'\n 211→ );\n 212→ }\n 213→\n 214→ removeTrack(trackId: string): void {\n 215→ const currentState = this.state();\n 216→ if (currentState.tracks.length <= 1) {\n 217→ return; // Keep at least one track\n 218→ }\n 219→\n 220→ // Get track name before removing\n 221→ const trackToRemove = currentState.tracks.find(t => t.id === trackId);\n 222→ const trackName = trackToRemove?.name || 'Track';\n 223→\n 224→ this.state.update(s => ({\n 225→ ...s,\n 226→ tracks: s.tracks.filter(t => t.id !== trackId)\n 227→ }));\n 228→\n 229→ // Show notification for removing track\n 230→ this.notificationsComponent?.showNotification(\n 231→ `Track \"${trackName}\" removed.`,\n 232→ 'info'\n 233→ );\n 234→ }\n 235→\n 236→ // Zoom controls\n 237→ zoomIn(): void {\n 238→ this.state.update(s => ({\n 239→ ...s,\n 240→ zoomLevel: Math.min(s.zoomLevel + this.ZOOM_STEP, this.MAX_ZOOM)\n 241→ }));\n 242→ }\n 243→\n 244→ zoomOut(): void {\n 245→ this.state.update(s => ({\n 246→ ...s,\n 247→ zoomLevel: Math.max(s.zoomLevel - this.ZOOM_STEP, this.MIN_ZOOM)\n 248→ }));\n 249→ }\n 250→\n 251→ // Utility method to extract coordinates from mouse or touch events\n 252→ private getEventCoordinates(event: MouseEvent | TouchEvent): { clientX: number; clientY: number } {\n 253→ if (event instanceof MouseEvent) {\n 254→ return { clientX: event.clientX, clientY: event.clientY };\n 255→ } else {\n 256→ const touch = event.touches[0] || event.changedTouches[0];\n 257→ return { clientX: touch.clientX, clientY: touch.clientY };\n 258→ }\n 259→ }\n 260→\n 261→ // Playhead controls\n 262→ onRulerPointerDown(event: MouseEvent | TouchEvent): void {\n 263→ event.preventDefault();\n 264→ this.isDraggingFromRuler = true;\n 265→\n 266→ // Immediately update position on pointer down\n 267→ const target = event.currentTarget as HTMLElement;\n 268→ const rect = target.getBoundingClientRect();\n 269→ const coords = this.getEventCoordinates(event);\n 270→ // Calculate position within the ruler element\n 271→ // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n 272→ const x = coords.clientX - rect.left;\n 273→ const newPosition = x / this.pixelsPerMillisecond();\n 274→ const currentState = this.state();\n 275→ const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n 276→\n 277→ this.state.update(s => ({\n 278→ ...s,\n 279→ playheadPosition: clampedPosition\n 280→ }));\n 281→\n 282→ // Sync position to playback service for seeking\n 283→ this.playbackService.seek(currentState.tracks, clampedPosition);\n 284→ }\n 285→\n 286→ onPlayheadPointerDown(event: MouseEvent | TouchEvent): void {\n 287→ event.preventDefault();\n 288→ event.stopPropagation();\n 289→ this.isDraggingPlayhead = true;\n 290→ }\n 291→\n 292→\n 293→ // Media item drag and drop\n 294→ onMediaItemPointerDown(event: MouseEvent | TouchEvent, item: MediaItem, track: Track): void {\n 295→ const target = event.target as HTMLElement;\n 296→\n 297→ // Check if clicking/touching on resize handle\n 298→ if (target.classList.contains('resize-handle')) {\n 299→ this.resizingItem = {\n 300→ item,\n 301→ edge: target.classList.contains('resize-handle-left') ? 'left' : 'right'\n 302→ };\n 303→ event.preventDefault();\n 304→ return;\n 305→ }\n 306→\n 307→ const coords = this.getEventCoordinates(event);\n 308→ this.mouseDownPosition = { x: coords.clientX, y: coords.clientY };\n 309→\n 310→ const mediaItemElement = event.currentTarget as HTMLElement;\n 311→ const rect = mediaItemElement.getBoundingClientRect();\n 312→ const clickX = coords.clientX - rect.left;\n 313→\n 314→ // Convert pixel offset to time offset\n 315→ this.dragOffsetTime = clickX / this.pixelsPerMillisecond();\n 316→\n 317→ this.draggedItem = item;\n 318→ this.draggedItemOriginalTrackId = track.id;\n 319→ event.preventDefault();\n 320→ }\n 321→\n 322→ onTrackPointerDown(event: MouseEvent | TouchEvent): void {\n 323→ // Deselect when clicking/touching track background (not on media item)\n 324→ const target = event.target as HTMLElement;\n 325→ if (target.classList.contains('track')) {\n 326→ this.deselectMediaItem();\n 327→ }\n 328→ }\n 329→\n 330→ onTrackPointerMove(event: MouseEvent | TouchEvent, track: Track): void {\n 331→ if (this.resizingItem) {\n 332→ this.handleResize(event, track);\n 333→ return;\n 334→ }\n 335→ event.preventDefault();\n 336→ event.stopPropagation();\n 337→\n 338→ if (!this.draggedItem) return;\n 339→\n 340→ const coords = this.getEventCoordinates(event);\n 341→ const target = event.currentTarget as HTMLElement;\n 342→ const rect = target.getBoundingClientRect();\n 343→ const x = coords.clientX - rect.left;\n 344→ const requestedStartTime = Math.max(0, x / this.pixelsPerMillisecond() - this.dragOffsetTime);\n 345→\n 346→ this.state.update(s => {\n 347→ const updatedTracks = s.tracks.map(t => {\n 348→ if (t.id === track.id) {\n 349→ // Get all items except the dragged one for collision detection\n 350→ const otherItems = t.items.filter(i => i.id !== this.draggedItem!.id);\n 351→\n 352→ // Fix for issue #81: Find snap targets (playhead and items on all tracks)\n 353→ const snapTargets = this.dragDropService.findSnapTargets(\n 354→ this.draggedItem!.id,\n 355→ s.tracks,\n 356→ s.playheadPosition\n 357→ );\n 358→\n 359→ // Calculate valid position and duration considering collisions, gap fitting, and snapping\n 360→ const validPosition = this.dragDropService.getValidDragPosition(\n 361→ this.draggedItem!,\n 362→ requestedStartTime,\n 363→ otherItems,\n 364→ s.totalDuration,\n 365→ snapTargets\n 366→ );\n 367→\n 368→ // Check if item already exists in this track\n 369→ const itemExists = t.items.some(i => i.id === this.draggedItem!.id);\n 370→\n 371→ if (itemExists) {\n 372→ // Update position and duration in current track\n 373→ return {\n 374→ ...t,\n 375→ items: t.items.map(i =>\n 376→ i.id === this.draggedItem!.id\n 377→ ? {\n 378→ ...i,\n 379→ startTime: validPosition.startTime,\n 380→ duration: validPosition.duration,\n 381→ trackId: track.id\n 382→ }\n 383→ : i\n 384→ )\n 385→ };\n 386→ } else {\n 387→ // Add to new track with adjusted position and duration\n 388→ return {\n 389→ ...t,\n 390→ items: [\n 391→ ...otherItems,\n 392→ {\n 393→ ...this.draggedItem!,\n 394→ startTime: validPosition.startTime,\n 395→ duration: validPosition.duration,\n 396→ trackId: track.id\n 397→ }\n 398→ ]\n 399→ };\n 400→ }\n 401→ } else if (t.id === this.draggedItemOriginalTrackId && t.id !== track.id) {\n 402→ // Remove from original track only if moving to different track\n 403→ return {\n 404→ ...t,\n 405→ items: t.items.filter(i => i.id !== this.draggedItem!.id)\n 406→ };\n 407→ }\n 408→ return t;\n 409→ });\n 410→\n 411→ // Update the original track ID to current track for smooth dragging within same track\n 412→ this.draggedItemOriginalTrackId = track.id;\n 413→\n 414→ return { ...s, tracks: updatedTracks };\n 415→ });\n 416→ }\n 417→\n 418→ private handleResize(event: MouseEvent | TouchEvent, track: Track): void {\n 419→ if (!this.resizingItem) return;\n 420→\n 421→ const coords = this.getEventCoordinates(event);\n 422→ const target = event.currentTarget as HTMLElement;\n 423→ const rect = target.getBoundingClientRect();\n 424→ // Fix for issue #83: getBoundingClientRect() returns viewport-relative coordinates,\n 425→ // and coords.clientX is also viewport-relative, so we don't need to add scrollLeft\n 426→ const x = coords.clientX - rect.left;\n 427→ const timeAtCursor = x / this.pixelsPerMillisecond();\n 428→\n 429→ this.state.update(s => {\n 430→ // Fix for issue #87: Find snap targets for resize operations\n 431→ const snapTargets = this.dragDropService.findSnapTargets(\n 432→ this.resizingItem!.item.id,\n 433→ s.tracks,\n 434→ s.playheadPosition\n 435→ );\n 436→\n 437→ const updatedTracks = s.tracks.map(t => {\n 438→ if (t.id === track.id) {\n 439→ // Get resize bounds considering adjacent items\n 440→ const bounds = this.dragDropService.getResizeBounds(\n 441→ this.resizingItem!.item,\n 442→ t.items,\n 443→ this.resizingItem!.edge,\n 444→ s.totalDuration\n 445→ );\n 446→\n 447→ return {\n 448→ ...t,\n 449→ items: t.items.map(i => {\n 450→ if (i.id === this.resizingItem!.item.id) {\n 451→ if (this.resizingItem!.edge === 'left') {\n 452→ // Fix for issue #89: Handle mediaStartTime when resizing from left\n 453→ // Apply snapping to left edge (start time)\n 454→ let newStartTime = Math.max(\n 455→ bounds.minTime,\n 456→ Math.min(timeAtCursor, bounds.maxTime)\n 457→ );\n 458→\n 459→ // Apply snapping if within snap distance\n 460→ let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n 461→ for (const target of snapTargets) {\n 462→ const distance = Math.abs(newStartTime - target);\n 463→ if (distance < minDistance) {\n 464→ minDistance = distance;\n 465→ // Only snap if within bounds\n 466→ if (target >= bounds.minTime && target <= bounds.maxTime) {\n 467→ newStartTime = target;\n 468→ }\n 469→ }\n 470→ }\n 471→\n 472→ // Calculate how much the timeline position is changing\n 473→ const deltaTime = newStartTime - i.startTime;\n 474→ const newDuration = i.duration - deltaTime;\n 475→\n 476→ // Update media start time (trimming from source media)\n 477→ const curre***********tTime = i.mediaStartTime || 0;\n 478→ const newMediaStartTime = curre***********tTime + deltaTime;\n 479→\n 480→ // Check if we're trying to extend beyond the start of source media\n 481→ if (newMediaStartTime < 0) {\n 482→ // Can only extend left by curre***********tTime amount\n 483→ const maxExtension = currentMediaStartTime;\n 484→ const finalStartTime = i.startTime - maxExtension;\n 485→ const finalDuration = i.duration + maxExtension;\n 486→\n 487→ // Ensure we don't exceed maxDuration\n 488→ if (i.maxDuration && finalDuration > i.maxDuration) {\n 489→ return {\n 490→ ...i,\n 491→ startTime: finalStartTime + (finalDuration - i.maxDuration),\n 492→ duration: i.maxDuration,\n 493→ mediaStartTime: 0\n 494→ };\n 495→ }\n 496→\n 497→ return {\n 498→ ...i,\n 499→ startTime: finalStartTime,\n 500→ duration: finalDuration,\n 501→ mediaStartTime: 0\n 502→ };\n 503→ }\n 504→\n 505→ // Ensure media end doesn't exceed maxDuration\n 506→ if (i.maxDuration && newMediaStartTime + newDuration > i.maxDuration) {\n 507→ const maxAllowedDuration = i.maxDuration - newMediaStartTime;\n 508→ return {\n 509→ ...i,\n 510→ startTime: i.startTime + (i.duration - maxAllowedDuration),\n 511→ duration: maxAllowedDuration,\n 512→ mediaStartTime: newMediaStartTime\n 513→ };\n 514→ }\n 515→\n 516→ return {\n 517→ ...i,\n 518→ startTime: newStartTime,\n 519→ duration: newDuration,\n 520→ mediaStartTime: newMediaStartTime\n 521→ };\n 522→ } else {\n 523→ // Fix for issue #87: Apply snapping to right edge (end time)\n 524→ let newEndTime = Math.max(\n 525→ bounds.minTime,\n 526→ Math.min(timeAtCursor, bounds.maxTime)\n 527→ );\n 528→\n 529→ // Apply snapping if within snap distance\n 530→ let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n 531→ for (const target of snapTargets) {\n 532→ const distance = Math.abs(newEndTime - target);\n 533→ if (distance < minDistance) {\n 534→ minDistance = distance;\n 535→ // Only snap if within bounds\n 536→ if (target >= bounds.minTime && target <= bounds.maxTime) {\n 537→ newEndTime = target;\n 538→ }\n 539→ }\n 540→ }\n 541→\n 542→ const newDuration = newEndTime - i.startTime;\n 543→\n 544→ // Limit duration by maxDuration if specified\n 545→ const limitedDuration = i.maxDuration\n 546→ ? Math.min(newDuration, i.maxDuration)\n 547→ : newDuration;\n 548→\n 549→ return { ...i, duration: limitedDuration };\n 550→ }\n 551→ }\n 552→ return i;\n 553→ })\n 554→ };\n 555→ }\n 556→ return t;\n 557→ });\n 558→\n 559→ return { ...s, tracks: updatedTracks };\n 560→ });\n 561→ }\n 562→\n 563→ onPointerUp(event: MouseEvent | TouchEvent): void {\n 564→ // Detect if this was a click/tap (not a drag) on a media item\n 565→ if (this.draggedItem && this.mouseDownPosition) {\n 566→ const coords = this.getEventCoordinates(event);\n 567→ const dx = coords.clientX - this.mouseDownPosition.x;\n 568→ const dy = coords.clientY - this.mouseDownPosition.y;\n 569→ const distance = Math.sqrt(dx * dx + dy * dy);\n 570→\n 571→ // If pointer moved less than 5 pixels, consider it a click/tap\n 572→ if (distance < 5) {\n 573→ this.selectMediaItem(this.draggedItem.id);\n 574→ }\n 575→ }\n 576→\n 577→ this.draggedItem = null;\n 578→ this.draggedItemOriginalTrackId = null;\n 579→ this.dragOffsetTime = 0;\n 580→ this.isDraggingPlayhead = false;\n 581→ this.isDraggingFromRuler = false;\n 582→ this.resizingItem = null;\n 583→ this.mouseDownPosition = null;\n 584→ }\n 585→\n 586→ onDocumentPointerMove(event: MouseEvent | TouchEvent): void {\n 587→ if (this.isDraggingPlayhead || this.isDraggingFromRuler) {\n 588→ // Fix for issue #50: Use ViewChild reference to ensure we use the exact same element as onRulerPointerDown\n 589→ if (!this.timelineRuler) {\n 590→ return;\n 591→ }\n 592→\n 593→ const coords = this.getEventCoordinates(event);\n 594→ const rulerElement = this.timelineRuler.nativeElement;\n 595→ // Use the same calculation as onRulerPointerDown\n 596→ // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n 597→ const rect = rulerElement.getBoundingClientRect();\n 598→ const x = coords.clientX - rect.left;\n 599→ const newPosition = x / this.pixelsPerMillisecond();\n 600→ const currentState = this.state();\n 601→ const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n 602→\n 603→ this.state.update(s => ({\n 604→ ...s,\n 605→ playheadPosition: clampedPosition\n 606→ }));\n 607→\n 608→ // Sync position to playback service for seeking (but don't call too frequently during drag)\n 609→ this.playbackService.seek(currentState.tracks, clampedPosition);\n 610→ }\n 611→\n 612→ // Fix for issue #96: Handle media item dragging and resizing at document level for touch events\n 613→ // This allows dragging between tracks on mobile devices\n 614→ if (event instanceof TouchEvent) {\n 615→ if (this.draggedItem) {\n 616→ // Find which track the touch is currently over\n 617→ const targetTrack = this.findTrackAtCoordinates(this.getEventCoordinates(event));\n 618→ if (targetTrack) {\n 619→ // Reuse existing drag logic\n 620→ this.onTrackPointerMove(event, targetTrack);\n 621→ }\n 622→ } else if (this.resizingItem) {\n 623→ // Find the track that contains the resizing item\n 624→ const targetTrack = this.findTrackContainingItem(this.resizingItem.item.id);\n 625→ if (targetTrack) {\n 626→ // Reuse existing resize logic\n 627→ this.handleResize(event, targetTrack);\n 628→ }\n 629→ }\n 630→ }\n 631→ }\n 632→\n 633→ // Helper method to find which track is at the given Y coordinate\n 634→ private findTrackAtCoordinates(coords: { clientX: number; clientY: number }): Track | null {\n 635→ const trackElements = document.querySelectorAll('.track');\n 636→ for (const trackElement of Array.from(trackElements)) {\n 637→ const rect = trackElement.getBoundingClientRect();\n 638→ if (coords.clientY >= rect.top && coords.clientY <= rect.bottom) {\n 639→ const trackIndex = Array.from(trackElements).indexOf(trackElement);\n 640→ const tracks = this.state().tracks;\n 641→ if (trackIndex >= 0 && trackIndex < tracks.length) {\n 642→ return tracks[trackIndex];\n 643→ }\n 644→ }\n 645→ }\n 646→ return null;\n 647→ }\n 648→\n 649→ // Helper method to find the track containing a specific item\n 650→ private findTrackContainingItem(itemId: string): Track | null {\n 651→ const currentState = this.state();\n 652→ for (const track of currentState.tracks) {\n 653→ if (track.items.some(item => item.id === itemId)) {\n 654→ return track;\n 655→ }\n 656→ }\n 657→ return null;\n 658→ }\n 659→\n 660→ // Helper methods\n 661→ getItemStyle(item: MediaItem) {\n 662→ return {\n 663→ left: `${item.startTime * this.pixelsPerMillisecond()}px`,\n 664→ width: `${item.duration * this.pixelsPerMillisecond()}px`\n 665→ };\n 666→ }\n 667→\n 668→ getMediaTypeClass(type: MediaType): string {\n 669→ return `media-${type}`;\n 670→ }\n 671→\n 672→ formatTime(milliseconds: number): string {\n 673→ const seconds = Math.floor(milliseconds / 1000);\n 674→ const minutes = Math.floor(seconds / 60);\n 675→ const remainingSeconds = seconds % 60;\n 676→ const cs = Math.floor((milliseconds % 1000) / 10);\n 677→ return `${minutes}:${remainingSeconds.toString().padStart(2, '0')}.${cs.toString().padStart(2, '0')}`;\n 678→ }\n 679→\n 680→ /**\n 681→ * Calculate appropriate time interval for markers based on zoom level\n 682→ * to prevent marker labels from overlapping\n 683→ */\n 684→ private getMarkerInterval(): number {\n 685→ // Minimum spacing between markers in pixels to prevent overlap\n 686→ // Enough space for \"0:00.000\" text (about 50-60px)\n 687→ const MIN_M***********NG_PX = 60;\n 688→\n 689→ // Calculate how much time represents MIN_M***********NG_PX at current zoom\n 690→ const pixelsPerMs = this.pixelsPerMillisecond();\n 691→ const minTimeSpacing = MIN_M***********NG_PX / pixelsPerMs;\n 692→\n 693→ // Define possible intervals (in ms): 100ms, 250ms, 500ms, 1s, 2s, 5s, 10s, 30s, 60s\n 694→ const intervals = [100, 250, 500, 1000, 2000, 5000, 10000, 30000, 60000];\n 695→\n 696→ // Find the smallest interval that's larger than or equal to minTimeSpacing\n 697→ for (const interval of intervals) {\n 698→ if (interval >= minTimeSpacing) {\n 699→ return interval;\n 700→ }\n 701→ }\n 702→\n 703→ // If even 60s is too small, use larger intervals\n 704→ return Math.ceil(minTimeSpacing / 60000) * 60000;\n 705→ }\n 706→\n 707→ getTimeMarkers(): { position: number; label: string }[] {\n 708→ const markers: { position: number; label: string }[] = [];\n 709→ const stepMs = this.getMarkerInterval(); // Dynamic interval based on zoom level\n 710→\n 711→ // Fix for issue #85: Do not show the last time mark at totalDuration\n 712→ // to prevent container expansion from the text label\n 713→ for (let time = 0; time < this.state().totalDuration; time += stepMs) {\n 714→ markers.push({\n 715→ position: time * this.pixelsPerMillisecond(),\n 716→ label: this.formatTime(time)\n 717→ });\n 718→ }\n 719→\n 720→ return markers;\n 721→ }\n 722→\n 723→ // Add placeholder media item\n 724→ addMediaItem(type: MediaType, trackId: string): void {\n 725→ const currentState = this.state();\n 726→ const track = currentState.tracks.find(t => t.id === trackId);\n 727→\n 728→ if (!track) return;\n 729→\n 730→ const playheadTime = currentState.playheadPosition;\n 731→ const totalDuration = currentState.totalDuration;\n 732→ const newItemDuration = type === MediaType.IMAGE ? 5000 : 3000;\n 733→\n 734→ // Determine the start time for the new item using the service\n 735→ const startTime = this.dragDropService.calculateNewItemStartTime(\n 736→ playheadTime,\n 737→ track.items,\n 738→ this.SNAP_PROXIMITY_MS\n 739→ );\n 740→\n 741→ // Fix for issue #48: Ensure new item doesn't exceed totalDuration\n 742→ const maxAllowedDuration = totalDuration - startTime;\n 743→ const finalDuration = Math.min(newItemDuration, maxAllowedDuration);\n 744→\n 745→ // Fix for issue #64: Verify that the new item doesn't overlap with any existing items\n 746→ const testItem: MediaItem = {\n 747→ id: 'temp',\n 748→ type,\n 749→ startTime,\n 750→ duration: finalDuration,\n 751→ trackId,\n 752→ name: '',\n 753→ isPlaceholder: true\n 754→ };\n 755→\n 756→ // Validate and adjust position if needed\n 757→ const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n 758→\n 759→ // Recalculate duration limit if position was adjusted\n 760→ const adjus****************ation = totalDuration - validatedStartTime;\n 761→ const adjustedDuration = Math.min(newItemDuration, adjustedMaxAllowedDuration);\n 762→\n 763→ // Create the final non-overlapping item\n 764→ const newItem: MediaItem = {\n 765→ id: `item-${Date.now()}`,\n 766→ type,\n 767→ startTime: validatedStartTime,\n 768→ duration: adjustedDuration,\n 769→ trackId,\n 770→ name: `${type} placeholder`,\n 771→ isPlaceholder: true\n 772→ };\n 773→\n 774→ // Set maxDuration for audio and video placeholders\n 775→ if (type === MediaType.VIDEO) {\n 776→ newItem.maxDuration = Math.min(10000, adjustedMaxAllowedDuration); // 10 seconds default for video\n 777→ } else if (type === MediaType.AUDIO) {\n 778→ newItem.maxDuration = Math.min(15000, adjustedMaxAllowedDuration); // 15 seconds default for audio\n 779→ }\n 780→\n 781→ this.state.update(s => ({\n 782→ ...s,\n 783→ tracks: s.tracks.map(t =>\n 784→ t.id === trackId\n 785→ ? { ...t, items: [...t.items, newItem] }\n 786→ : t\n 787→ )\n 788→ }));\n 789→\n 790→ // Show notification for adding media\n 791→ this.notificationsComponent?.showNotification(\n 792→ 'Media added to timeline.',\n 793→ 'success'\n 794→ );\n 795→ }\n 796→\n 797→ removeMediaItem(itemId: string, trackId: string): void {\n 798→ this.state.update(s => ({\n 799→ ...s,\n 800→ tracks: s.tracks.map(t =>\n 801→ t.id === trackId\n 802→ ? { ...t, items: t.items.filter(i => i.id !== itemId) }\n 803→ : t\n 804→ ),\n 805→ // Deselect if removing selected item\n 806→ selectedItemId: s.selectedItemId === itemId ? null : s.selectedItemId\n 807→ }));\n 808→\n 809→ // Show notification for removing media\n 810→ this.notificationsComponent?.showNotification(\n 811→ 'Media removed from timeline.',\n 812→ 'info'\n 813→ );\n 814→ }\n 815→\n 816→ // Media selection\n 817→ selectMediaItem(itemId: string): void {\n 818→ this.state.update(s => ({\n 819→ ...s,\n 820→ selectedItemId: itemId\n 821→ }));\n 822→ }\n 823→\n 824→ deselectMediaItem(): void {\n 825→ this.state.update(s => ({\n 826→ ...s,\n 827→ selectedItemId: null\n 828→ }));\n 829→ }\n 830→\n 831→ isItemSelected(itemId: string): boolean {\n 832→ return this.state().selectedItemId === itemId;\n 833→ }\n 834→\n 835→ readonly MediaType = MediaType;\n 836→\n 837→ /**\n 838→ * Create a new project by clearing the timeline and LocalStorage\n 839→ */\n 840→ newProject(): void {\n 841→ // Stop playback if playing\n 842→ if (this.playbackService.isPlaying()) {\n 843→ this.playbackService.stop();\n 844→ this.isPlaying.set(false);\n 845→ }\n 846→\n 847→ // Reset timeline state to initial values\n 848→ this.state.set({\n 849→ tracks: [\n 850→ { id: '1', name: 'Track 1', order: 0, items: [] },\n 851→ { id: '2', name: 'Track 2', order: 1, items: [] }\n 852→ ],\n 853→ playheadPosition: 0,\n 854→ zoomLevel: 50,\n 855→ totalDuration: 120000,\n 856→ selectedItemId: null\n 857→ });\n 858→\n 859→ // Clear LocalStorage\n 860→ this.storageService.clearState();\n 861→\n 862→ // Show notification\n 863→ this.notificationsComponent?.showNotification(\n 864→ 'New project created. Timeline cleared.',\n 865→ 'success'\n 866→ );\n 867→ }\n 868→\n 869→ // Video preview controls\n 870→ togglePlayback(): void {\n 871→ const currentState = this.state();\n 872→\n 873→ if (this.playbackService.isPlaying()) {\n 874→ this.playbackService.pause();\n 875→ this.isPlaying.set(false);\n 876→ } else {\n 877→ // Sync playhead position to PlaybackService before starting\n 878→ this.playbackService.setPlayheadPosition(currentState.playheadPosition);\n 879→ this.playbackService.play(currentState.tracks, currentState.totalDuration);\n 880→ this.isPlaying.set(true);\n 881→ }\n 882→ }\n 883→\n 884→ skipBackward(): void {\n 885→ const currentState = this.state();\n 886→ const newPosition = Math.max(0, currentState.playheadPosition - 5000);\n 887→\n 888→ this.state.update(s => ({\n 889→ ...s,\n 890→ playheadPosition: newPosition\n 891→ }));\n 892→\n 893→ // Sync position and update media\n 894→ this.playbackService.seek(currentState.tracks, newPosition);\n 895→ }\n 896→\n 897→ skipForward(): void {\n 898→ const currentState = this.state();\n 899→ const newPosition = Math.min(currentState.totalDuration, currentState.playheadPosition + 5000);\n 900→\n 901→ this.state.update(s => ({\n 902→ ...s,\n 903→ playheadPosition: newPosition\n 904→ }));\n 905→\n 906→ // Sync position and update media\n 907→ this.playbackService.seek(currentState.tracks, newPosition);\n 908→ }\n 909→\n 910→ // Duration editor methods\n 911→ openDurationEditor(): void {\n 912→ this.editedDuration = this.state().totalDuration / 1000;\n 913→ this.showDurationEditor.set(true);\n 914→ }\n 915→\n 916→ closeDurationEditor(): void {\n 917→ this.showDurationEditor.set(false);\n 918→ }\n 919→\n 920→ onDurationInputChange(event: Event): void {\n 921→ const input = event.target as HTMLInputElement;\n 922→ const value = parseFloat(input.value);\n 923→ if (!isNaN(value) && value > 0) {\n 924→ this.editedDuration = value;\n 925→ }\n 926→ }\n 927→\n 928→ saveDuration(): void {\n 929→ const newDurationMs = Math.max(1000, this.editedDuration * 1000); // At least 1 second\n 930→ this.state.update(s => ({\n 931→ ...s,\n 932→ totalDuration: newDurationMs,\n 933→ // Ensure playhead doesn't exceed new duration\n 934→ playheadPosition: Math.min(s.playheadPosition, newDurationMs)\n 935→ }));\n 936→ this.closeDurationEditor();\n 937→ }\n 938→\n 939→ // Media library methods\n 940→ openMediaLibrary(trackId: string): void {\n 941→ this.mediaLibraryTargetTrackId = trackId;\n 942→ this.showMediaLibrary.set(true);\n 943→ }\n 944→\n 945→ closeMediaLibrary(): void {\n 946→ this.showMediaLibrary.set(false);\n 947→ this.mediaLibraryTargetTrackId = null;\n 948→ }\n 949→\n 950→ onMediaSelected(media: MediaLibraryItem): void {\n 951→ if (!this.mediaLibraryTargetTrackId) return;\n 952→\n 953→ const currentState = this.state();\n 954→ const track = currentState.tracks.find(t => t.id === this.mediaLibraryTargetTrackId);\n 955→\n 956→ if (!track) return;\n 957→\n 958→ const playheadTime = currentState.playheadPosition;\n 959→ const totalDuration = currentState.totalDuration;\n 960→\n 961→ // Determine the start time for the new item using the service\n 962→ const startTime = this.dragDropService.calculateNewItemStartTime(\n 963→ playheadTime,\n 964→ track.items,\n 965→ this.SNAP_PROXIMITY_MS\n 966→ );\n 967→\n 968→ // Ensure item doesn't exceed totalDuration\n 969→ const maxAllowedDuration = totalDuration - startTime;\n 970→ const finalDuration = Math.min(media.duration, maxAllowedDuration);\n 971→\n 972→ // Verify that the new item doesn't overlap with any existing items\n 973→ const testItem: MediaItem = {\n 974→ id: 'temp',\n 975→ type: media.type,\n 976→ startTime,\n 977→ duration: finalDuration,\n 978→ trackId: this.mediaLibraryTargetTrackId,\n 979→ name: '',\n 980→ isPlaceholder: false\n 981→ };\n 982→\n 983→ // Validate and adjust position if needed\n 984→ const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n 985→\n 986→ // Recalculate duration limit if position was adjusted\n 987→ const adjus****************ation = totalDuration - validatedStartTime;\n 988→ const adjustedDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n 989→\n 990→ // Create the final non-overlapping item\n 991→ const newItem: MediaItem = {\n 992→ id: `item-${Date.now()}`,\n 993→ type: media.type,\n 994→ startTime: validatedStartTime,\n 995→ duration: adjustedDuration,\n 996→ trackId: this.mediaLibraryTargetTrackId,\n 997→ name: media.name,\n 998→ url: media.url, // Pass URL from media library for playback\n 999→ isPlaceholder: false\n 1000→ };\n 1001→\n 1002→ // Set maxDuration for audio and video\n 1003→ if (media.type === MediaType.VIDEO) {\n 1004→ newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n 1005→ } else if (media.type === MediaType.AUDIO) {\n 1006→ newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n 1007→ }\n 1008→\n 1009→ this.state.update(s => ({\n 1010→ ...s,\n 1011→ tracks: s.tracks.map(t =>\n 1012→ t.id === this.mediaLibraryTargetTrackId\n 1013→ ? { ...t, items: [...t.items, newItem] }\n 1014→ : t\n 1015→ )\n 1016→ }));\n 1017→\n 1018→ // Show notification for adding media\n 1019→ this.notificationsComponent?.showNotification(\n 1020→ `\"${media.name}\" added to timeline.`,\n 1021→ 'success'\n 1022→ );\n 1023→\n 1024→ // Close the media library after selection\n 1025→ this.closeMediaLibrary();\n 1026→ }\n 1027→\n 1028→ /**\n 1029→ * Trim (split) the selected media item at the playhead position.\n 1030→ * Creates two separate items from the original media.\n 1031→ */\n 1032→ trimSelectedMedia(): void {\n 1033→ const currentState = this.state();\n 1034→ const selectedItemId = currentState.selectedItemId;\n 1035→\n 1036→ if (!selectedItemId) {\n 1037→ return;\n 1038→ }\n 1039→\n 1040→ // Find the selected item and its track\n 1041→ let selectedItem: MediaItem | null = null;\n 1042→ let selectedTrack: Track | null = null;\n 1043→\n 1044→ for (const track of currentState.tracks) {\n 1045→ const item = track.items.find(i => i.id === selectedItemId);\n 1046→ if (item) {\n 1047→ selectedItem = item;\n 1048→ selectedTrack = track;\n 1049→ break;\n 1050→ }\n 1051→ }\n 1052→\n 1053→ if (!selectedItem || !selectedTrack) {\n 1054→ return;\n 1055→ }\n 1056→\n 1057→ const playheadTime = currentState.playheadPosition;\n 1058→ const itemStart = selectedItem.startTime;\n 1059→ const itemEnd = itemStart + selectedItem.duration;\n 1060→\n 1061→ // Check if playhead is within the selected media item\n 1062→ if (playheadTime <= itemStart || playheadTime >= itemEnd) {\n 1063→ // Playhead is not within the selected media - show notification\n 1064→ this.notificationsComponent?.showNotification(\n 1065→ 'Position the playhead within the selected media to trim it.',\n 1066→ 'warning'\n 1067→ );\n 1068→ return;\n 1069→ }\n 1070→\n 1071→ // Ensure both parts will have at least MIN_ITEM_DURATION\n 1072→ const firstPartDuration = playheadTime - itemStart;\n 1073→ const secondPartDuration = itemEnd - playheadTime;\n 1074→\n 1075→ if (firstPartDuration < this.MIN_ITEM_DURATION || secondPartDuration < this.MIN_ITEM_DURATION) {\n 1076→ this.notificationsComponent?.showNotification(\n 1077→ 'Cannot trim: resulting parts would be too short.',\n 1078→ 'warning'\n 1079→ );\n 1080→ return;\n 1081→ }\n 1082→\n 1083→ // Calculate mediaStartTime adjustments\n 1084→ const origi************tTime = selectedItem.mediaStartTime || 0;\n 1085→ const secon**************tTime = origi************tTime + firstPartDuration;\n 1086→\n 1087→ // Create two new items from the original\n 1088→ const firstPart: MediaItem = {\n 1089→ ...selectedItem,\n 1090→ id: `item-${Date.now()}-1`,\n 1091→ duration: firstPartDuration\n 1092→ // mediaStartTime stays the same for first part\n 1093→ };\n 1094→\n 1095→ const secondPart: MediaItem = {\n 1096→ ...selectedItem,\n 1097→ id: `item-${Date.now()}-2`,\n 1098→ startTime: playheadTime,\n 1099→ duration: secondPartDuration,\n 1100→ mediaStartTime: secondPartMediaStartTime\n 1101→ };\n 1102→\n 1103→ // Update the state: remove original, add two new parts\n 1104→ this.state.update(s => ({\n 1105→ ...s,\n 1106→ tracks: s.tracks.map(t => {\n 1107→ if (t.id === selectedTrack!.id) {\n 1108→ return {\n 1109→ ...t,\n 1110→ items: [\n 1111→ ...t.items.filter(i => i.id !== selectedItemId),\n 1112→ firstPart,\n 1113→ secondPart\n 1114→ ]\n 1115→ };\n 1116→ }\n 1117→ return t;\n 1118→ }),\n 1119→ // Deselect after trimming\n 1120→ selectedItemId: null\n 1121→ }));\n 1122→\n 1123→ this.notificationsComponent?.showNotification(\n 1124→ 'Media trimmed successfully.',\n 1125→ 'success'\n 1126→ );\n 1127→ }\n 1128→\n 1129→ /**\n 1130→ * Copy the selected media item to the clipboard.\n 1131→ * Stores a copy of the item and the track it was copied from.\n 1132→ */\n 1133→ copySelectedMedia(): void {\n 1134→ const currentState = this.state();\n 1135→ const selectedItemId = currentState.selectedItemId;\n 1136→\n 1137→ if (!selectedItemId) {\n 1138→ return;\n 1139→ }\n 1140→\n 1141→ // Find the selected item and its track\n 1142→ let selectedItem: MediaItem | null = null;\n 1143→ let selectedTrackId: string | null = null;\n 1144→\n 1145→ for (const track of currentState.tracks) {\n 1146→ const item = track.items.find(i => i.id === selectedItemId);\n 1147→ if (item) {\n 1148→ selectedItem = item;\n 1149→ selectedTrackId = track.id;\n 1150→ break;\n 1151→ }\n 1152→ }\n 1153→\n 1154→ if (!selectedItem || !selectedTrackId) {\n 1155→ return;\n 1156→ }\n 1157→\n 1158→ // Store a copy of the item in clipboard\n 1159→ this.clipboardItem.set({ ...selectedItem });\n 1160→ this.clipboardSourceTrackId.set(selectedTrackId);\n 1161→\n 1162→ this.notificationsComponent?.showNotification(\n 1163→ 'Media copied to clipboard.',\n 1164→ 'success'\n 1165→ );\n 1166→ }\n 1167→\n 1168→ /**\n 1169→ * Paste the clipboard media item at the playhead position.\n 1170→ * Pastes on the same track where the item was copied from.\n 1171→ * If there's no space at playhead position, finds the next available slot.\n 1172→ */\n 1173→ pasteMedia(): void {\n 1174→ const copiedItem = this.clipboardItem();\n 1175→ const sourceTrackId = this.clipboardSourceTrackId();\n 1176→\n 1177→ if (!copiedItem || !sourceTrackId) {\n 1178→ return;\n 1179→ }\n 1180→\n 1181→ const currentState = this.state();\n 1182→ const playheadTime = currentState.playheadPosition;\n 1183→ const totalDuration = currentState.totalDuration;\n 1184→\n 1185→ // Find the source track\n 1186→ let targetTrack = currentState.tracks.find(t => t.id === sourceTrackId);\n 1187→\n 1188→ // If source track no longer exists, use the first track\n 1189→ if (!targetTrack) {\n 1190→ targetTrack = currentState.tracks[0];\n 1191→ if (!targetTrack) {\n 1192→ this.notificationsComponent?.showNotification(\n 1193→ 'No tracks available to paste media.',\n 1194→ 'error'\n 1195→ );\n 1196→ return;\n 1197→ }\n 1198→ }\n 1199→\n 1200→ const itemDuration = copiedItem.duration;\n 1201→\n 1202→ // Try to find a valid position starting from playhead\n 1203→ const pastePosition = this.findPastePosition(\n 1204→ playheadTime,\n 1205→ itemDuration,\n 1206→ targetTrack.items,\n 1207→ totalDuration\n 1208→ );\n 1209→\n 1210→ if (pastePosition === null) {\n 1211→ this.notificationsComponent?.showNotification(\n 1212→ 'No space available to paste media on this track.',\n 1213→ 'warning'\n 1214→ );\n 1215→ return;\n 1216→ }\n 1217→\n 1218→ // Create a new item with a new ID\n 1219→ const newItem: MediaItem = {\n 1220→ ...copiedItem,\n 1221→ id: `item-${Date.now()}`,\n 1222→ startTime: pastePosition,\n 1223→ trackId: targetTrack.id\n 1224→ };\n 1225→\n 1226→ // Add the new item to the track\n 1227→ this.state.update(s => ({\n 1228→ ...s,\n 1229→ tracks: s.tracks.map(t =>\n 1230→ t.id === targetTrack!.id\n 1231→ ? { ...t, items: [...t.items, newItem] }\n 1232→ : t\n 1233→ )\n 1234→ }));\n 1235→\n 1236→ this.notificationsComponent?.showNotification(\n 1237→ 'Media pasted successfully.',\n 1238→ 'success'\n 1239→ );\n 1240→ }\n 1241→\n 1242→ /**\n 1243→ * Find a valid position to paste media item.\n 1244→ * First tries at the playhead position, then finds the next available gap.\n 1245→ */\n 1246→ private findPastePosition(\n 1247→ preferredPosition: number,\n 1248→ duration: number,\n 1249→ existingItems: MediaItem[],\n 1250→ totalDuration: number\n 1251→ ): number | null {\n 1252→ // Check if we can fit at the preferred position (playhead)\n 1253→ if (this.canFitAtPosition(preferredPosition, duration, existingItems, totalDuration)) {\n 1254→ return preferredPosition;\n 1255→ }\n 1256→\n 1257→ // Sort existing items by start time\n 1258→ const sortedItems = [...existingItems].sort((a, b) => a.startTime - b.startTime);\n 1259→\n 1260→ // Find all gaps on the track and try to place the item\n 1261→ const gaps = this.dragDropService.findAllGaps(sortedItems);\n 1262→\n 1263→ // First, try to find a gap that starts at or after the playhead\n 1264→ for (const gap of gaps) {\n 1265→ // Calculate actual gap size (considering totalDuration for infinite gaps)\n 1266→ const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n 1267→ const gapSize = effectiveGapEnd - gap.gapStart;\n 1268→\n 1269→ if (gap.gapStart >= preferredPosition && gapSize >= duration) {\n 1270→ return gap.gapStart;\n 1271→ }\n 1272→ }\n 1273→\n 1274→ // If no gap after playhead, try any gap that can fit the item\n 1275→ for (const gap of gaps) {\n 1276→ // Calculate actual gap size (considering totalDuration for infinite gaps)\n 1277→ const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n 1278→ const gapSize = effectiveGapEnd - gap.gapStart;\n 1279→\n 1280→ if (gapSize >= duration) {\n 1281→ return gap.gapStart;\n 1282→ }\n 1283→ }\n 1284→\n 1285→ // No suitable position found\n 1286→ return null;\n 1287→ }\n 1288→\n 1289→ /**\n 1290→ * Check if an item can fit at a specific position without overlapping.\n 1291→ */\n 1292→ private canFitAtPosition(\n 1293→ position: number,\n 1294→ duration: number,\n 1295→ existingItems: MediaItem[],\n 1296→ totalDuration: number\n 1297→ ): boolean {\n 1298→ // Check bounds\n 1299→ if (position < 0 || position + duration > totalDuration) {\n 1300→ return false;\n 1301→ }\n 1302→\n 1303→ // Check for overlaps with existing items\n 1304→ const endPosition = position + duration;\n 1305→ for (const item of existingItems) {\n 1306→ const itemEnd = item.startTime + item.duration;\n 1307→ // Check if there's an overlap\n 1308→ if (position < itemEnd && endPosition > item.startTime) {\n 1309→ return false;\n 1310→ }\n 1311→ }\n 1312→\n 1313→ return true;\n 1314→ }\n 1315→}\n 1316→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"parent_tool_use_id":null,"session_id":"c3de30fe-a5bd-49e6-8052-bb51f10fe87f","uuid":"fc0b128a-bc4b-49e9-8734-e64ef0c83c4c","tool_use_result":{"type":"text","file":{"filePath":"/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts","content":"import { Component, signal, computed, ViewChild, ElementRef, AfterViewInit, OnDestroy, effect } from '@angular/core';\nimport { CommonModule } from '@angular/common';\nimport { MediaType, MediaItem, Track, TimelineState } from '../../models/timeline.models';\nimport { MediaLibraryComponent, MediaLibraryItem } from '../media-library/media-library.component';\nimport { Media***********onent } from '../media-toolbar/media-toolbar.component';\nimport { Notif************onent } from '../notifications/notifications.component';\nimport { Timel*************rvice } from '../../services/timeline-drag-drop.service';\nimport { PlaybackService } from '../../services/playback.service';\nimport { Timel************rvice } from '../../services/timeline-storage.service';\n\n@Component({\n selector: 'app-timeline',\n standalone: true,\n imports: [CommonModule, MediaLibraryComponent, MediaToolbarComponent, NotificationsComponent],\n templateUrl: './timeline.component.html',\n styleUrl: './timeline.component.css'\n})\nexport class TimelineComponent implements AfterViewInit, OnDestroy {\n // Zoom levels: pixels per second\n private readonly MIN_ZOOM = 10;\n private readonly MAX_ZOOM = 200;\n private readonly ZOOM_STEP = 20;\n readonly TRACK_HEADER_WIDTH = 150; // Width of track header in pixels\n private readonly SNAP_PROXIMITY_MS = 500; // Snap to item if playhead is within 500ms\n private readonly MIN_ITEM_DURATION = 100; // Minimum item duration in milliseconds\n\n // Canvas dimensions for preview\n readonly PREVIEW_WIDTH = 640;\n readonly PREVIEW_HEIGHT = 360;\n\n // View references\n @ViewChild('timelineRuler') timelineRuler?: ElementRef<HTMLElement>;\n @ViewChild('notifications') notificationsComponent?: NotificationsComponent;\n @ViewChild('previewCanvas') previewCanvas?: ElementRef<HTMLCanvasElement>;\n\n // Timeline state\n readonly state = signal<TimelineState>({\n tracks: [\n { id: '1', name: 'Track 1', order: 0, items: [] },\n { id: '2', name: 'Track 2', order: 1, items: [] }\n ],\n playheadPosition: 0,\n zoomLevel: 50, // pixels per second\n totalDuration: 120000, // 120 seconds in milliseconds\n selectedItemId: null\n });\n\n // Computed values\n readonly pixel**********econd = computed(() => {\n return this.state().zoomLevel / 1000;\n });\n\n readonly timelineWidth = computed(() => {\n const state = this.state();\n // Calculate the maximum end time across all tracks\n let maxEndTime = state.totalDuration;\n\n for (const track of state.tracks) {\n for (const item of track.items) {\n const itemEndTime = item.startTime + item.duration;\n if (itemEndTime > maxEndTime) {\n maxEndTime = itemEndTime;\n }\n }\n }\n\n return maxEndTime * this.pixelsPerMillisecond();\n });\n\n readonly timelineLineHeight = computed(() => {\n const state = this.state();\n return state.tracks.length * 60 + 32;\n });\n\n readonly playheadPosition = computed(() => {\n return this.state().playheadPosition * this.pixelsPerMillisecond();\n });\n\n readonly playh************ition = computed(() => {\n return this.playheadPosition() + this.TRACK_HEADER_WIDTH;\n });\n\n // Computed: whether a media item is currently selected\n readonly hasSelectedItem = computed(() => {\n return this.state().selectedItemId !== null;\n });\n\n // Dragging state\n private draggedItem: MediaItem | null = null;\n private draggedItemOriginalTrackId: string | null = null;\n private dragOffsetTime: number = 0; // Offset in milliseconds from item start to cursor position\n private isDraggingPlayhead = false;\n private isDraggingFromRuler = false;\n private resizingItem: { item: MediaItem; edge: 'left' | 'right' } | null = null;\n private mouseDownPosition: { x: number; y: number } | null = null; // Track mouse down position for click detection\n\n // Video preview state\n readonly isPlaying = signal<boolean>(false);\n\n // Duration editor state\n readonly showDurationEditor = signal<boolean>(false);\n private editedDuration: number = 120; // Duration in seconds\n\n // Media library state\n readonly showMediaLibrary = signal<boolean>(false);\n private mediaLibraryTargetTrackId: string | null = null;\n\n // Clipboard state for copy/paste functionality\n private readonly clipboardItem = signal<MediaItem | null>(null);\n private readonly clipb************ackId = signal<string | null>(null);\n\n // Computed: whether a media item is in clipboard\n readonly hasClipboardItem = computed(() => {\n return this.clipboardItem() !== null;\n });\n\n // Render loop ID for cleanup\n private renderLoopId: number | null = null;\n\n constructor(\n private dragDropService: TimelineDragDropService,\n public playbackService: PlaybackService,\n private storageService: TimelineStorageService\n ) {\n // Load saved state from LocalStorage on initialization\n const savedState = this.storageService.loadState();\n if (savedState) {\n this.state.set(savedState);\n }\n\n // Effect to sync playhead position from PlaybackService during playback\n effect(() => {\n if (this.playbackService.isPlaying()) {\n const position = this.playbackService.playheadPosition();\n this.state.update(s => ({\n ...s,\n playheadPosition: position\n }));\n }\n });\n\n // Effect to auto-save timeline state to LocalStorage on any change\n effect(() => {\n const currentState = this.state();\n this.storageService.saveState(currentState);\n });\n }\n\n ngAfterViewInit(): void {\n // Initialize canvas for preview rendering\n if (this.previewCanvas) {\n this.playbackService.setCanvas(this.previewCanvas.nativeElement);\n }\n\n // Start continuous render loop for preview (renders current frame even when paused)\n this.startRenderLoop();\n\n // Synchronize media and render initial frame if state was loaded from LocalStorage\n const currentState = this.state();\n if (currentState.tracks.length > 0) {\n this.playbackService.seek(currentState.tracks, currentState.playheadPosition);\n }\n }\n\n ngOnDestroy(): void {\n // Clean up render loop\n if (this.renderLoopId !== null) {\n cancelAnimationFrame(this.renderLoopId);\n this.renderLoopId = null;\n }\n\n // Stop playback\n this.playbackService.stop();\n }\n\n /**\n * Continuous render loop for preview canvas.\n * Keeps rendering even when paused so seeking updates the preview.\n */\n private startRenderLoop(): void {\n const render = () => {\n // Only render if we have active media and are not playing\n // (PlaybackService handles rendering during playback)\n if (!this.playbackService.isPlaying()) {\n this.playbackService.renderCurrentFrame();\n }\n this.renderLoopId = requestAnimationFrame(render);\n };\n this.renderLoopId = requestAnimationFrame(render);\n }\n\n // Track management\n addTrack(): void {\n const currentState = this.state();\n const newTrack: Track = {\n id: `track-${Date.now()}`,\n name: `Track ${currentState.tracks.length + 1}`,\n order: currentState.tracks.length,\n items: []\n };\n\n this.state.update(s => ({\n ...s,\n tracks: [...s.tracks, newTrack]\n }));\n\n // Show notification for adding track\n this.notificationsComponent?.showNotification(\n `Track \"${newTrack.name}\" added.`,\n 'success'\n );\n }\n\n removeTrack(trackId: string): void {\n const currentState = this.state();\n if (currentState.tracks.length <= 1) {\n return; // Keep at least one track\n }\n\n // Get track name before removing\n const trackToRemove = currentState.tracks.find(t => t.id === trackId);\n const trackName = trackToRemove?.name || 'Track';\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.filter(t => t.id !== trackId)\n }));\n\n // Show notification for removing track\n this.notificationsComponent?.showNotification(\n `Track \"${trackName}\" removed.`,\n 'info'\n );\n }\n\n // Zoom controls\n zoomIn(): void {\n this.state.update(s => ({\n ...s,\n zoomLevel: Math.min(s.zoomLevel + this.ZOOM_STEP, this.MAX_ZOOM)\n }));\n }\n\n zoomOut(): void {\n this.state.update(s => ({\n ...s,\n zoomLevel: Math.max(s.zoomLevel - this.ZOOM_STEP, this.MIN_ZOOM)\n }));\n }\n\n // Utility method to ext
[2025-12-22T21:46:22.897Z] [INFO] ract coordinates from mouse or touch events\n private getEventCoordinates(event: MouseEvent | TouchEvent): { clientX: number; clientY: number } {\n if (event instanceof MouseEvent) {\n return { clientX: event.clientX, clientY: event.clientY };\n } else {\n const touch = event.touches[0] || event.changedTouches[0];\n return { clientX: touch.clientX, clientY: touch.clientY };\n }\n }\n\n // Playhead controls\n onRulerPointerDown(event: MouseEvent | TouchEvent): void {\n event.preventDefault();\n this.isDraggingFromRuler = true;\n\n // Immediately update position on pointer down\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n const coords = this.getEventCoordinates(event);\n // Calculate position within the ruler element\n // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n const x = coords.clientX - rect.left;\n const newPosition = x / this.pixelsPerMillisecond();\n const currentState = this.state();\n const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n\n this.state.update(s => ({\n ...s,\n playheadPosition: clampedPosition\n }));\n\n // Sync position to playback service for seeking\n this.playbackService.seek(currentState.tracks, clampedPosition);\n }\n\n onPlayheadPointerDown(event: MouseEvent | TouchEvent): void {\n event.preventDefault();\n event.stopPropagation();\n this.isDraggingPlayhead = true;\n }\n\n\n // Media item drag and drop\n onMediaItemPointerDown(event: MouseEvent | TouchEvent, item: MediaItem, track: Track): void {\n const target = event.target as HTMLElement;\n\n // Check if clicking/touching on resize handle\n if (target.classList.contains('resize-handle')) {\n this.resizingItem = {\n item,\n edge: target.classList.contains('resize-handle-left') ? 'left' : 'right'\n };\n event.preventDefault();\n return;\n }\n\n const coords = this.getEventCoordinates(event);\n this.mouseDownPosition = { x: coords.clientX, y: coords.clientY };\n\n const mediaItemElement = event.currentTarget as HTMLElement;\n const rect = mediaItemElement.getBoundingClientRect();\n const clickX = coords.clientX - rect.left;\n\n // Convert pixel offset to time offset\n this.dragOffsetTime = clickX / this.pixelsPerMillisecond();\n\n this.draggedItem = item;\n this.draggedItemOriginalTrackId = track.id;\n event.preventDefault();\n }\n\n onTrackPointerDown(event: MouseEvent | TouchEvent): void {\n // Deselect when clicking/touching track background (not on media item)\n const target = event.target as HTMLElement;\n if (target.classList.contains('track')) {\n this.deselectMediaItem();\n }\n }\n\n onTrackPointerMove(event: MouseEvent | TouchEvent, track: Track): void {\n if (this.resizingItem) {\n this.handleResize(event, track);\n return;\n }\n event.preventDefault();\n event.stopPropagation();\n\n if (!this.draggedItem) return;\n\n const coords = this.getEventCoordinates(event);\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n const x = coords.clientX - rect.left;\n const requestedStartTime = Math.max(0, x / this.pixelsPerMillisecond() - this.dragOffsetTime);\n\n this.state.update(s => {\n const updatedTracks = s.tracks.map(t => {\n if (t.id === track.id) {\n // Get all items except the dragged one for collision detection\n const otherItems = t.items.filter(i => i.id !== this.draggedItem!.id);\n\n // Fix for issue #81: Find snap targets (playhead and items on all tracks)\n const snapTargets = this.dragDropService.findSnapTargets(\n this.draggedItem!.id,\n s.tracks,\n s.playheadPosition\n );\n\n // Calculate valid position and duration considering collisions, gap fitting, and snapping\n const validPosition = this.dragDropService.getValidDragPosition(\n this.draggedItem!,\n requestedStartTime,\n otherItems,\n s.totalDuration,\n snapTargets\n );\n\n // Check if item already exists in this track\n const itemExists = t.items.some(i => i.id === this.draggedItem!.id);\n\n if (itemExists) {\n // Update position and duration in current track\n return {\n ...t,\n items: t.items.map(i =>\n i.id === this.draggedItem!.id\n ? {\n ...i,\n startTime: validPosition.startTime,\n duration: validPosition.duration,\n trackId: track.id\n }\n : i\n )\n };\n } else {\n // Add to new track with adjusted position and duration\n return {\n ...t,\n items: [\n ...otherItems,\n {\n ...this.draggedItem!,\n startTime: validPosition.startTime,\n duration: validPosition.duration,\n trackId: track.id\n }\n ]\n };\n }\n } else if (t.id === this.draggedItemOriginalTrackId && t.id !== track.id) {\n // Remove from original track only if moving to different track\n return {\n ...t,\n items: t.items.filter(i => i.id !== this.draggedItem!.id)\n };\n }\n return t;\n });\n\n // Update the original track ID to current track for smooth dragging within same track\n this.draggedItemOriginalTrackId = track.id;\n\n return { ...s, tracks: updatedTracks };\n });\n }\n\n private handleResize(event: MouseEvent | TouchEvent, track: Track): void {\n if (!this.resizingItem) return;\n\n const coords = this.getEventCoordinates(event);\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n // Fix for issue #83: getBoundingClientRect() returns viewport-relative coordinates,\n // and coords.clientX is also viewport-relative, so we don't need to add scrollLeft\n const x = coords.clientX - rect.left;\n const timeAtCursor = x / this.pixelsPerMillisecond();\n\n this.state.update(s => {\n // Fix for issue #87: Find snap targets for resize operations\n const snapTargets = this.dragDropService.findSnapTargets(\n this.resizingItem!.item.id,\n s.tracks,\n s.playheadPosition\n );\n\n const updatedTracks = s.tracks.map(t => {\n if (t.id === track.id) {\n // Get resize bounds considering adjacent items\n const bounds = this.dragDropService.getResizeBounds(\n this.resizingItem!.item,\n t.items,\n this.resizingItem!.edge,\n s.totalDuration\n );\n\n return {\n ...t,\n items: t.items.map(i => {\n if (i.id === this.resizingItem!.item.id) {\n if (this.resizingItem!.edge === 'left') {\n // Fix for issue #89: Handle mediaStartTime when resizing from left\n // Apply snapping to left edge (start time)\n let newStartTime = Math.max(\n bounds.minTime,\n Math.min(timeAtCursor, bounds.maxTime)\n );\n\n // Apply snapping if within snap distance\n let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n for (const target of snapTargets) {\n const distance = Math.abs(newStartTime - target);\n if (distance < minDistance) {\n minDistance = distance;\n // Only snap if within bounds\n if (target >= bounds.minTime && target <= bounds.maxTime) {\n newStartTime = target;\n }\n }\n }\n\n // Calculate how much the timeline position is changing\n const deltaTime = newStartTime - i.startTime;\n const newDuration = i.duration - deltaTime;\n\n // Update media start time (trimming from source media)\n const curre***********tTime = i.mediaStartTime || 0;\n const newMediaStartTime = curre***********tTime + deltaTime;\n\n // Check if we're trying to extend beyond the start of source media\n if (newMediaStartTime < 0) {\n // Can only extend left by curre***********tTime amount\n const maxExtension = currentMediaStartTime;\n const finalStartTime = i.startTime - maxExtension;\n const finalDuration = i.duration + maxExtension;\n\n // Ensure we don't exceed maxDuration\n if (i.maxDuration && finalDuration > i.maxDuration) {\n return {\n ...i,\n startTime: finalStartTime + (finalDuration - i.maxDuration),\n duration: i.maxDuration,\n mediaStartTime: 0\n };\n }\n\n return {\n ...i,\n startTime: finalStartTime,\n duration: finalDuration,\n mediaStartTime: 0\n };\n }\n\n // Ensure media end doesn't exceed maxDuration\n if (i.maxDuration && newMediaStartTime + newDuration > i.maxDuration) {\n const maxAllowedDuration = i.maxDuration - newMediaStartTime;\n return {\n ...i,\n startTime: i.startTime + (i.duration - maxAllowedDuration),\n duration: maxAllowedDuration,\n mediaStartTime: newMediaStartTime\n };\n }\n\n return {\n ...i,\n startTime: newStartTime,\n duration: newDuration,\n mediaStartTime: newMediaStartTime\n };\n } else {\n // Fix for issue #87: Apply snapping to right edge (end time)\n let newEndTime = Math.max(\n bounds.minTime,\n Math.min(timeAtCursor, bounds.maxTime)\n );\n\n // Apply snapping if within snap distance\n let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n for (const target of snapTargets) {\n const distance = Math.abs(newEndTime - target);\n if (distance < minDistance) {\n minDistance = distance;\n // Only snap if within bounds\n if (target >= bounds.minTime && target <= bounds.maxTime) {\n newEndTime = target;\n }\n }\n }\n\n const newDuration = newEndTime - i.startTime;\n\n // Limit duration by maxDuration if specified\n const limitedDuration = i.maxDuration\n ? Math.min(newDuration, i.maxDuration)\n : newDuration;\n\n return { ...i, duration: limitedDuration };\n }\n }\n return i;\n })\n };\n }\n return t;\n });\n\n return { ...s, tracks: updatedTracks };\n });\n }\n\n onPointerUp(event: MouseEvent | TouchEvent): void {\n // Detect if this was a click/tap (not a drag) on a media item\n if (this.draggedItem && this.mouseDownPosition) {\n const coords = this.getEventCoordinates(event);\n const dx = coords.clientX - this.mouseDownPosition.x;\n const dy = coords.clientY - this.mouseDownPosition.y;\n const distance = Math.sqrt(dx * dx + dy * dy);\n\n // If pointer moved less than 5 pixels, consider it a click/tap\n if (distance < 5) {\n this.selectMediaItem(this.draggedItem.id);\n }\n }\n\n this.draggedItem = null;\n this.draggedItemOriginalTrackId = null;\n this.dragOffsetTime = 0;\n this.isDraggingPlayhead = false;\n this.isDraggingFromRuler = false;\n this.resizingItem = null;\n this.mouseDownPosition = null;\n }\n\n onDocumentPointerMove(event: MouseEvent | TouchEvent): void {\n if (this.isDraggingPlayhead || this.isDraggingFromRuler) {\n // Fix for issue #50: Use ViewChild reference to ensure we use the exact same element as onRulerPointerDown\n if (!this.timelineRuler) {\n return;\n }\n\n const coords = this.getEventCoordinates(event);\n const rulerElement = this.timelineRuler.nativeElement;\n // Use the same calculation as onRulerPointerDown\n // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n const rect = rulerElement.getBoundingClientRect();\n const x = coords.clientX - rect.left;\n const newPosition = x / this.pixelsPerMillisecond();\n const currentState = this.state();\n const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n\n this.state.update(s => ({\n ...s,\n playheadPosition: clampedPosition\n }));\n\n // Sync position to playback service for seeking (but don't call too frequently during drag)\n this.playbackService.seek(currentState.tracks, clampedPosition);\n }\n\n // Fix for issue #96: Handle media item dragging and resizing at document level for touch events\n // This allows dragging between tracks on mobile devices\n if (event instanceof TouchEvent) {\n if (this.draggedItem) {\n // Find which track the touch is currently over\n const targetTrack = this.findTrackAtCoordinates(this.getEventCoordinates(event));\n if (targetTrack) {\n // Reuse existing drag logic\n this.onTrackPointerMove(event, targetTrack);\n }\n } else if (this.resizingItem) {\n // Find the track that contains the resizing item\n const targetTrack = this.findTrackContainingItem(this.resizingItem.item.id);\n if (targetTrack) {\n // Reuse existing resize logic\n this.handleResize(event, targetTrack);\n }\n }\n }\n }\n\n // Helper method to find which track is at the given Y coordinate\n private findTrackAtCoordinates(coords: { clientX: number; clientY: number }): Track | null {\n const trackElements = document.querySelectorAll('.track');\n for (const trackElement of Array.from(trackElements)) {\n const rect = trackElement.getBoundingClientRect();\n if (coords.clientY >= rect.top && coords.clientY <= rect.bottom) {\n const trackIndex = Array.from(trackElements).indexOf(trackElement);\n const tracks = this.state().tracks;\n if (trackIndex >= 0 && trackIndex < tracks.length) {\n return tracks[trackIndex];\n }\n }\n }\n return null;\n }\n\n // Helper method to find the track containing a specific item\n private findTrackContainingItem(itemId: string): Track | null {\n const currentState = this.state();\n for (const track of currentState.tracks) {\n if (track.items.some(item => item.id === itemId)) {\n return track;\n }\n }\n return null;\n }\n\n // Helper methods\n getItemStyle(item: MediaItem) {\n return {\n left: `${item.startTime * this.pixelsPerMillisecond()}px`,\n width: `${item.duration * this.pixelsPerMillisecond()}px`\n };\n }\n\n getMediaTypeClass(type: MediaType): string {\n return `media-${type}`;\n }\n\n formatTime(milliseconds: number): string {\n const seconds = Math.floor(milliseconds / 1000);\n const minutes = Math.floor(seconds / 60);\n const remainingSeconds = seconds % 60;\n const cs = Math.floor((milliseconds % 1000) / 10);\n return `${minutes}:${remainingSeconds.toString().padStart(2, '0')}.${cs.toString().padStart(2, '0')}`;\n }\n\n /**\n * Calculate appropriate time interval for markers based on zoom level\n * to prevent marker labels from overlapping\n */\n private getMarkerInterval(): number {\n // Minimum spacing between markers in pixels to prevent overlap\n // Enough space for \"0:00.000\" text (about 50-60px)\n const MIN_M***********NG_PX = 60;\n\n // Calculate how much time represents MIN_M***********NG_PX at current zoom\n const pixelsPerMs = this.pixelsPerMillisecond();\n const minTimeSpacing = MIN_M***********NG_PX / pixelsPerMs;\n\n // Define possible intervals (in ms): 100ms, 250ms, 500ms, 1s, 2s, 5s, 10s, 30s, 60s\n const intervals = [100, 250, 500, 1000, 2000, 5000, 10000, 30000, 60000];\n\n // Find the smallest interval that's larger than or equal to minTimeSpacing\n for (const interval of intervals) {\n if (interval >= minTimeSpacing) {\n return interval;\n }\n }\n\n // If even 60s is too small, use larger intervals\n return Math.ceil(minTimeSpacing / 60000) * 60000;\n }\n\n getTimeMarkers(): { position: number; label: string }[] {\n const markers: { position: number; label: string }[] = [];\n const stepMs = this.getMarkerInterval(); // Dynamic interval based on zoom level\n\n // Fix for issue #85: Do not show the last time mark at totalDuration\n // to prevent container expansion from the text label\n for (let time = 0; time < this.state().totalDuration; time += stepMs) {\n markers.push({\n position: time * this.pixelsPerMillisecond(),\n label: this.formatTime(time)\n });\n }\n\n return markers;\n }\n\n // Add placeholder media item\n addMediaItem(type: MediaType, trackId: string): void {\n const currentState = this.state();\n const track = currentState.tracks.find(t => t.id === trackId);\n\n if (!track) return;\n\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n const newItemDuration = type === MediaType.IMAGE ? 5000 : 3000;\n\n // Determine the start time for the new item using the service\n const startTime = this.dragDropService.calculateNewItemStartTime(\n playheadTime,\n track.items,\n this.SNAP_PROXIMITY_MS\n );\n\n // Fix for issue #48: Ensure new item doesn't exceed totalDuration\n const maxAllowedDuration = totalDuration - startTime;\n const finalDuration = Math.min(newItemDuration, maxAllowedDuration);\n\n // Fix for issue #64: Verify that the new item doesn't overlap with any existing items\n const testItem: MediaItem = {\n id: 'temp',\n type,\n startTime,\n duration: finalDuration,\n trackId,\n name: '',\n isPlaceholder: true\n };\n\n // Validate and adjust position if needed\n const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n\n // Recalculate duration limit if position was adjusted\n const adjus****************ation = totalDuration - validatedStartTime;\n const adjustedDuration = Math.min(newItemDuration, adjustedMaxAllowedDuration);\n\n // Create the final non-overlapping item\n const newItem: MediaItem = {\n id: `item-${Date.now()}`,\n type,\n startTime: validatedStartTime,\n duration: adjustedDuration,\n trackId,\n name: `${type} placeholder`,\n isPlaceholder: true\n };\n\n // Set maxDuration for audio and video placeholders\n if (type === MediaType.VIDEO) {\n newItem.maxDuration = Math.min(10000, adjustedMaxAllowedDuration); // 10 seconds default for video\n } else if (type === MediaType.AUDIO) {\n newItem.maxDuration = Math.min(15000, adjustedMaxAllowedDuration); // 15 seconds default for audio\n }\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === trackId\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n // Show notification for adding media\n this.notificationsComponent?.showNotification(\n 'Media added to timeline.',\n 'success'\n );\n }\n\n removeMediaItem(itemId: string, trackId: string): void {\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === trackId\n ? { ...t, items: t.items.filter(i => i.id !== itemId) }\n : t\n ),\n // Deselect if removing selected item\n selectedItemId: s.selectedItemId === itemId ? null : s.selectedItemId\n }));\n\n // Show notification for removing media\n this.notificationsComponent?.showNotification(\n 'Media removed from timeline.',\n 'info'\n );\n }\n\n // Media selection\n selectMediaItem(itemId: string): void {\n this.state.update(s => ({\n ...s,\n selectedItemId: itemId\n }));\n }\n\n deselectMediaItem(): void {\n this.state.update(s => ({\n ...s,\n selectedItemId: null\n }));\n }\n\n isItemSelected(itemId: string): boolean {\n return this.state().selectedItemId === itemId;\n }\n\n readonly MediaType = MediaType;\n\n /**\n * Create a new project by clearing the timeline and LocalStorage\n */\n newProject(): void {\n // Stop playback if playing\n if (this.playbackService.isPlaying()) {\n this.playbackService.stop();\n this.isPlaying.set(false);\n }\n\n // Reset timeline state to initial values\n this.state.set({\n tracks: [\n { id: '1', name: 'Track 1', order: 0, items: [] },\n { id: '2', name: 'Track 2', order: 1, items: [] }\n ],\n playheadPosition: 0,\n zoomLevel: 50,\n totalDuration: 120000,\n selectedItemId: null\n });\n\n // Clear LocalStorage\n this.storageService.clearState();\n\n // Show notification\n this.notificationsComponent?.showNotification(\n 'New project created. Timeline cleared.',\n 'success'\n );\n }\n\n // Video preview controls\n togglePlayback(): void {\n const currentState = this.state();\n\n if (this.playbackService.isPlaying()) {\n this.playbackService.pause();\n this.isPlaying.set(false);\n } else {\n // Sync playhead position to PlaybackService before starting\n this.playbackService.setPlayheadPosition(currentState.playheadPosition);\n this.playbackService.play(currentState.tracks, currentState.totalDuration);\n this.isPlaying.set(true);\n }\n }\n\n skipBackward(): void {\n const currentState = this.state();\n const newPosition = Math.max(0, currentState.playheadPosition - 5000);\n\n this.state.update(s => ({\n ...s,\n playheadPosition: newPosition\n }));\n\n // Sync position and update media\n this.playbackService.seek(currentState.tracks, newPosition);\n }\n\n skipForward(): void {\n const currentState = this.state();\n const newPosition = Math.min(currentState.totalDuration, currentState.playheadPosition + 5000);\n\n this.state.update(s => ({\n ...s,\n playheadPosition: newPosition\n }));\n\n // Sync position and update media\n this.playbackService.seek(currentState.tracks, newPosition);\n }\n\n // Duration editor methods\n openDurationEditor(): void {\n this.editedDuration = this.state().totalDuration / 1000;\n this.showDurationEditor.set(true);\n }\n\n closeDurationEditor(): void {\n this.showDurationEditor.set(false);\n }\n\n onDurationInputChange(event: Event): void {\n const input = event.target as HTMLInputElement;\n const value = parseFloat(input.value);\n if (!isNaN(value) && value > 0) {\n this.editedDuration = value;\n }\n }\n\n saveDuration(): void {\n const newDurationMs = Math.max(1000, this.editedDuration * 1000); // At least 1 second\n this.state.update(s => ({\n ...s,\n totalDuration: newDurationMs,\n // Ensure playhead doesn't exceed new duration\n playheadPosition: Math.min(s.playheadPosition, newDurationMs)\n }));\n this.closeDurationEditor();\n }\n\n // Media library methods\n openMediaLibrary(trackId: string): void {\n this.mediaLibraryTargetTrackId = trackId;\n this.showMediaLibrary.set(true);\n }\n\n closeMediaLibrary(): void {\n this.showMediaLibrary.set(false);\n this.mediaLibraryTargetTrackId = null;\n }\n\n onMediaSelected(media: MediaLibraryItem): void {\n if (!this.mediaLibraryTargetTrackId) return;\n\n const currentState = this.state();\n const track = currentState.tracks.find(t => t.id === this.mediaLibraryTargetTrackId);\n\n if (!track) return;\n\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n\n // Determine the start time for the new item using the service\n const startTime = this.dragDropService.calculateNewItemStartTime(\n playheadTime,\n track.items,\n this.SNAP_PROXIMITY_MS\n );\n\n // Ensure item doesn't exceed totalDuration\n const maxAllowedDuration = totalDuration - startTime;\n const finalDuration = Math.min(media.duration, maxAllowedDuration);\n\n // Verify that the new item doesn't overlap with any existing items\n const testItem: MediaItem = {\n id: 'temp',\n type: media.type,\n startTime,\n duration: finalDuration,\n trackId: this.mediaLibraryTargetTrackId,\n name: '',\n isPlaceholder: false\n };\n\n // Validate and adjust position if needed\n const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n\n // Recalculate duration limit if position was adjusted\n const adjus****************ation = totalDuration - validatedStartTime;\n const adjustedDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n\n // Create the final non-overlapping item\n const newItem: MediaItem = {\n id: `item-${Date.now()}`,\n type: media.type,\n startTime: validatedStartTime,\n duration: adjustedDuration,\n trackId: this.mediaLibraryTargetTrackId,\n name: media.name,\n url: media.url, // Pass URL from media library for playback\n isPlaceholder: false\n };\n\n // Set maxDuration for audio and video\n if (media.type === MediaType.VIDEO) {\n newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n } else if (media.type === MediaType.AUDIO) {\n newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n }\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === this.mediaLibraryTargetTrackId\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n // Show notification for adding media\n this.notificationsComponent?.showNotification(\n `\"${media.name}\" added to timeline.`,\n 'success'\n );\n\n // Close the media library after selection\n this.closeMediaLibrary();\n }\n\n /**\n * Trim (split) the selected media item at the playhead position.\n * Creates two separate items from the original media.\n */\n trimSelectedMedia(): void {\n const currentState = this.state();\n const selectedItemId = currentState.selectedItemId;\n\n if (!selectedItemId) {\n return;\n }\n\n // Find the selected item and its track\n let selectedItem: MediaItem | null = null;\n let selectedTrack: Track | null = null;\n\n for (const track of currentState.tracks) {\n const item = track.items.find(i => i.id === selectedItemId);\n if (item) {\n selectedItem = item;\n selectedTrack = track;\n break;\n }\n }\n\n if (!selectedItem || !selectedTrack) {\n return;\n }\n\n const playheadTime = currentState.playheadPosition;\n const itemStart = selectedItem.startTime;\n const itemEnd = itemStart + selectedItem.duration;\n\n // Check if playhead is within the selected media item\n if (playheadTime <= itemStart || playheadTime >= itemEnd) {\n // Playhead is not within the selected media - show notification\n this.notificationsComponent?.showNotification(\n 'Position the playhead within the selected media to trim it.',\n 'warning'\n );\n return;\n }\n\n // Ensure both parts will have at least MIN_ITEM_DURATION\n const firstPartDuration = playheadTime - itemStart;\n const secondPartDuration = itemEnd - playheadTime;\n\n if (firstPartDuration < this.MIN_ITEM_DURATION || secondPartDuration < this.MIN_ITEM_DURATION) {\n this.notificationsComponent?.showNotification(\n 'Cannot trim: resulting parts would be too short.',\n 'warning'\n );\n return;\n }\n\n // Calculate mediaStartTime adjustments\n const origi************tTime = selectedItem.mediaStartTime || 0;\n const secon**************tTime = origi************tTime + firstPartDuration;\n\n // Create two new items from the original\n const firstPart: MediaItem = {\n ...selectedItem,\n id: `item-${Date.now()}-1`,\n duration: firstPartDuration\n // mediaStartTime stays the same for first part\n };\n\n const secondPart: MediaItem = {\n ...selectedItem,\n id: `item-${Date.now()}-2`,\n startTime: playheadTime,\n duration: secondPartDuration,\n mediaStartTime: secondPartMediaStartTime\n };\n\n // Update the state: remove original, add two new parts\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t => {\n if (t.id === selectedTrack!.id) {\n return {\n ...t,\n items: [\n ...t.items.filter(i => i.id !== selectedItemId),\n firstPart,\n secondPart\n ]\n };\n }\n return t;\n }),\n // Deselect after trimming\n selectedItemId: null\n }));\n\n this.notificationsComponent?.showNotification(\n 'Media trimmed successfully.',\n 'success'\n );\n }\n\n /**\n * Copy the selected media item to the clipboard.\n * Stores a copy of the item and the track it was copied from.\n */\n copySelectedMedia(): void {\n const currentState = this.state();\n const selectedItemId = currentState.selectedItemId;\n\n if (!selectedItemId) {\n return;\n }\n\n // Find the selected item and its track\n let selectedItem: MediaItem | null = null;\n let selectedTrackId: string | null = null;\n\n for (const track of currentState.tracks) {\n const item = track.items.find(i => i.id === selectedItemId);\n if (item) {\n selectedItem = item;\n selectedTrackId = track.id;\n break;\n }\n }\n\n if (!selectedItem || !selectedTrackId) {\n return;\n }\n\n // Store a copy of the item in clipboard\n this.clipboardItem.set({ ...selectedItem });\n this.clipboardSourceTrackId.set(selectedTrackId);\n\n this.notificationsComponent?.showNotification(\n 'Media copied to clipboard.',\n 'success'\n );\n }\n\n /**\n * Paste the clipboard media item at the playhead position.\n * Pastes on the same track where the item was copied from.\n * If there's no space at playhead position, finds the next available slot.\n */\n pasteMedia(): void {\n const copiedItem = this.clipboardItem();\n const sourceTrackId = this.clipboardSourceTrackId();\n\n if (!copiedItem || !sourceTrackId) {\n return;\n }\n\n const currentState = this.state();\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n\n // Find the source track\n let targetTrack = currentState.tracks.find(t => t.id === sourceTrackId);\n\n // If source track no longer exists, use the first track\n if (!targetTrack) {\n targetTrack = currentState.tracks[0];\n if (!targetTrack) {\n this.notificationsComponent?.showNotification(\n 'No tracks available to paste media.',\n 'error'\n );\n return;\n }\n }\n\n const itemDuration = copiedItem.duration;\n\n // Try to find a valid position starting from playhead\n const pastePosition = this.findPastePosition(\n playheadTime,\n itemDuration,\n targetTrack.items,\n totalDuration\n );\n\n if (pastePosition === null) {\n this.notificationsComponent?.showNotification(\n 'No space available to paste media on this track.',\n 'warning'\n );\n return;\n }\n\n // Create a new item with a new ID\n const newItem: MediaItem = {\n ...copiedItem,\n id: `item-${Date.now()}`,\n startTime: pastePosition,\n trackId: targetTrack.id\n };\n\n // Add the new item to the track\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === targetTrack!.id\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n this.notificationsComponent?.showNotification(\n 'Media pasted successfully.',\n 'success'\n );\n }\n\n /**\n * Find a valid position to paste media item.\n * First tries at the playhead position, then finds the next available gap.\n */\n private findPastePosition(\n preferredPosition: number,\n duration: number,\n existingItems: MediaItem[],\n totalDuration: number\n ): number | null {\n // Check if we can fit at the preferred position (playhead)\n if (this.canFitAtPosition(preferredPosition, duration, existingItems, totalDuration)) {\n return preferredPosition;\n }\n\n // Sort existing items by start time\n const sortedItems = [...existingItems].sort((a, b) => a.startTime - b.startTime);\n\n // Find all gaps on the track and try to place the item\n const gaps = this.dragDropService.findAllGaps(sortedItems);\n\n // First, try to find a gap that starts at or after the playhead\n for (const gap of gaps) {\n // Calculate actual gap size (considering totalDuration for infinite gaps)\n const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n const gapSize = effectiveGapEnd - gap.gapStart;\n\n if (gap.gapStart >= preferredPosition && gapSize >= duration) {\n return gap.gapStart;\n }\n }\n\n // If no gap after playhead, try any gap that can fit the item\n for (const gap of gaps) {\n // Calculate actual gap size (considering totalDuration for infinite gaps)\n const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n const gapSize = effectiveGapEnd - gap.gapStart;\n\n if (gapSize >= duration) {\n retu
[2025-12-22T21:46:22.990Z] [INFO] rn gap.gapStart;\n }\n }\n\n // No suitable position found\n return null;\n }\n\n /**\n * Check if an item can fit at a specific position without overlapping.\n */\n private canFitAtPosition(\n position: number,\n duration: number,\n existingItems: MediaItem[],\n totalDuration: number\n ): boolean {\n // Check bounds\n if (position < 0 || position + duration > totalDuration) {\n return false;\n }\n\n // Check for overlaps with existing items\n const endPosition = position + duration;\n for (const item of existingItems) {\n const itemEnd = item.startTime + item.duration;\n // Check if there's an overlap\n if (position < itemEnd && endPosition > item.startTime) {\n return false;\n }\n }\n\n return true;\n }\n}\n","numLines":1316,"startLine":1,"totalLines":1316}}}
[2025-12-22T21:46:27.290Z] [INFO] {
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"text": "Now I have a complete understanding of the codebase. Let me start implementing the undo/redo feature. First, I'll create the HistoryService:"
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[2025-12-22T21:46:33.380Z] [INFO] {
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"content": "Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable"
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"content": "The file /tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.html has been updated. Here's the result of running `cat -n` on a snippet of the edited file:\n 1→<div class=\"flex flex-col h-full bg-[#1e1e1e] text-gray-200 select-none\" (mouseup)=\"onPointerUp($event)\" (mousemove)=\"onDocumentPointerMove($event)\" (touchend)=\"onPointerUp($event)\" (touchmove)=\"onDocumentPointerMove($event)\">\n 2→ <!-- Toolbar -->\n 3→ <div class=\"flex justify-between items-center px-4 py-3 bg-[#252525] border-b border-[#3a3a3a]\">\n 4→ <h2 class=\"text-lg font-semibold m-0\">VideoEditor</h2>\n 5→ <div class=\"flex gap-4 items-center\">\n 6→ <!-- Undo/Redo buttons -->\n 7→ <div class=\"flex gap-1\">\n 8→ <button\n 9→ (click)=\"undo()\"\n 10→ [disabled]=\"!canUndo()\"\n 11→ class=\"px-3 py-1.5 bg-[#3a3a3a] text-white border-none rounded cursor-pointer text-sm transition-colors hover:bg-[#4a4a4a] flex items-center gap-2 disabled:opacity-40 disabled:cursor-not-allowed disabled:hover:bg-[#3a3a3a]\"\n 12→ title=\"Undo (Ctrl+Z)\">\n 13→ <i class=\"bi bi-arrow-counterclockwise\"></i>\n 14→ <span>Undo</span>\n 15→ </button>\n 16→ <button\n 17→ (click)=\"redo()\"\n 18→ [disabled]=\"!canRedo()\"\n 19→ class=\"px-3 py-1.5 bg-[#3a3a3a] text-white border-none rounded cursor-pointer text-sm transition-colors hover:bg-[#4a4a4a] flex items-center gap-2 disabled:opacity-40 disabled:cursor-not-allowed disabled:hover:bg-[#3a3a3a]\"\n 20→ title=\"Redo (Ctrl+Y)\">\n 21→ <i class=\"bi bi-arrow-clockwise\"></i>\n 22→ <span>Redo</span>\n 23→ </button>\n 24→ </div>\n 25→ <button\n 26→ (click)=\"newProject()\"\n 27→ class=\"px-3 py-1.5 bg-[#3a3a3a] text-white border-none rounded cursor-pointer text-sm transition-colors hover:bg-[#4a4a4a] flex items-center gap-2\"\n 28→ title=\"Create new project (clears timeline and saved data)\">\n 29→ <i class=\"bi bi-file-earmark-plus\"></i>\n 30→ <span>New project</span>\n 31→ </button>\n 32→ <div class=\"font-mono text-sm px-3 py-1 bg-[#2a2a2a] rounded cursor-pointer hover:bg-[#3a3a3a] transition-colors\"\n 33→ (click)=\"openDurationEditor()\"\n 34→ title=\"Click to change total duration\">\n 35→ {{ formatTime(state().playheadPosition) }} / {{ formatTime(state().totalDuration) }}"
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"session_id": "c3de30fe-a5bd-49e6-8052-bb51f10fe87f",
"uuid": "9affe7aa-5041-45a9-b79f-08246764cea3"
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[2025-12-22T21:47:41.809Z] [INFO] {"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01TmSrFtPDLJCzR8v8wyVVEU","type":"tool_result","content":"The file /tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts has been updated. Here's the result of running `cat -n` on a snippet of the edited file:\n 1→import { Component, signal, computed, ViewChild, ElementRef, AfterViewInit, OnDestroy, effect, HostListener } from '@angular/core';\n 2→import { CommonModule } from '@angular/common';\n 3→import { MediaType, MediaItem, Track, TimelineState } from '../../models/timeline.models';\n 4→import { MediaLibraryComponent, MediaLibraryItem } from '../media-library/media-library.component';\n 5→import { Media***********onent } from '../media-toolbar/media-toolbar.component';\n 6→import { Notif************onent } from '../notifications/notifications.component';\n 7→import { Timel*************rvice } from '../../services/timeline-drag-drop.service';\n 8→import { PlaybackService } from '../../services/playback.service';\n 9→import { Timel************rvice } from '../../services/timeline-storage.service';\n 10→import { Timel************rvice } from '../../services/timeline-history.service';\n 11→\n 12→@Component({\n 13→ selector: 'app-timeline',\n 14→ standalone: true,"}]},"parent_tool_use_id":null,"session_id":"c3de30fe-a5bd-49e6-8052-bb51f10fe87f","uuid":"799f0280-207a-4c0c-9474-b93944dd0d62","tool_use_result":{"filePath":"/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts","oldString":"import { Component, signal, computed, ViewChild, ElementRef, AfterViewInit, OnDestroy, effect } from '@angular/core';\nimport { CommonModule } from '@angular/common';\nimport { MediaType, MediaItem, Track, TimelineState } from '../../models/timeline.models';\nimport { MediaLibraryComponent, MediaLibraryItem } from '../media-library/media-library.component';\nimport { Me
[2025-12-22T21:47:41.850Z] [INFO] diaToolbarComponent } from '../media-toolbar/media-toolbar.component';\nimport { Notif************onent } from '../notifications/notifications.component';\nimport { Timel*************rvice } from '../../services/timeline-drag-drop.service';\nimport { PlaybackService } from '../../services/playback.service';\nimport { Timel************rvice } from '../../services/timeline-storage.service';","newString":"import { Component, signal, computed, ViewChild, ElementRef, AfterViewInit, OnDestroy, effect, HostListener } from '@angular/core';\nimport { CommonModule } from '@angular/common';\nimport { MediaType, MediaItem, Track, TimelineState } from '../../models/timeline.models';\nimport { MediaLibraryComponent, MediaLibraryItem } from '../media-library/media-library.component';\nimport { Media***********onent } from '../media-toolbar/media-toolbar.component';\nimport { Notif************onent } from '../notifications/notifications.component';\nimport { Timel*************rvice } from '../../services/timeline-drag-drop.service';\nimport { PlaybackService } from '../../services/playback.service';\nimport { Timel************rvice } from '../../services/timeline-storage.service';\nimport { Timel************rvice } from '../../services/timeline-history.service';","originalFile":"import { Component, signal, computed, ViewChild, ElementRef, AfterViewInit, OnDestroy, effect } from '@angular/core';\nimport { CommonModule } from '@angular/common';\nimport { MediaType, MediaItem, Track, TimelineState } from '../../models/timeline.models';\nimport { MediaLibraryComponent, MediaLibraryItem } from '../media-library/media-library.component';\nimport { Media***********onent } from '../media-toolbar/media-toolbar.component';\nimport { Notif************onent } from '../notifications/notifications.component';\nimport { Timel*************rvice } from '../../services/timeline-drag-drop.service';\nimport { PlaybackService } from '../../services/playback.service';\nimport { Timel************rvice } from '../../services/timeline-storage.service';\n\n@Component({\n selector: 'app-timeline',\n standalone: true,\n imports: [CommonModule, MediaLibraryComponent, MediaToolbarComponent, NotificationsComponent],\n templateUrl: './timeline.component.html',\n styleUrl: './timeline.component.css'\n})\nexport class TimelineComponent implements AfterViewInit, OnDestroy {\n // Zoom levels: pixels per second\n private readonly MIN_ZOOM = 10;\n private readonly MAX_ZOOM = 200;\n private readonly ZOOM_STEP = 20;\n readonly TRACK_HEADER_WIDTH = 150; // Width of track header in pixels\n private readonly SNAP_PROXIMITY_MS = 500; // Snap to item if playhead is within 500ms\n private readonly MIN_ITEM_DURATION = 100; // Minimum item duration in milliseconds\n\n // Canvas dimensions for preview\n readonly PREVIEW_WIDTH = 640;\n readonly PREVIEW_HEIGHT = 360;\n\n // View references\n @ViewChild('timelineRuler') timelineRuler?: ElementRef<HTMLElement>;\n @ViewChild('notifications') notificationsComponent?: NotificationsComponent;\n @ViewChild('previewCanvas') previewCanvas?: ElementRef<HTMLCanvasElement>;\n\n // Timeline state\n readonly state = signal<TimelineState>({\n tracks: [\n { id: '1', name: 'Track 1', order: 0, items: [] },\n { id: '2', name: 'Track 2', order: 1, items: [] }\n ],\n playheadPosition: 0,\n zoomLevel: 50, // pixels per second\n totalDuration: 120000, // 120 seconds in milliseconds\n selectedItemId: null\n });\n\n // Computed values\n readonly pixel**********econd = computed(() => {\n return this.state().zoomLevel / 1000;\n });\n\n readonly timelineWidth = computed(() => {\n const state = this.state();\n // Calculate the maximum end time across all tracks\n let maxEndTime = state.totalDuration;\n\n for (const track of state.tracks) {\n for (const item of track.items) {\n const itemEndTime = item.startTime + item.duration;\n if (itemEndTime > maxEndTime) {\n maxEndTime = itemEndTime;\n }\n }\n }\n\n return maxEndTime * this.pixelsPerMillisecond();\n });\n\n readonly timelineLineHeight = computed(() => {\n const state = this.state();\n return state.tracks.length * 60 + 32;\n });\n\n readonly playheadPosition = computed(() => {\n return this.state().playheadPosition * this.pixelsPerMillisecond();\n });\n\n readonly playh************ition = computed(() => {\n return this.playheadPosition() + this.TRACK_HEADER_WIDTH;\n });\n\n // Computed: whether a media item is currently selected\n readonly hasSelectedItem = computed(() => {\n return this.state().selectedItemId !== null;\n });\n\n // Dragging state\n private draggedItem: MediaItem | null = null;\n private draggedItemOriginalTrackId: string | null = null;\n private dragOffsetTime: number = 0; // Offset in milliseconds from item start to cursor position\n private isDraggingPlayhead = false;\n private isDraggingFromRuler = false;\n private resizingItem: { item: MediaItem; edge: 'left' | 'right' } | null = null;\n private mouseDownPosition: { x: number; y: number } | null = null; // Track mouse down position for click detection\n\n // Video preview state\n readonly isPlaying = signal<boolean>(false);\n\n // Duration editor state\n readonly showDurationEditor = signal<boolean>(false);\n private editedDuration: number = 120; // Duration in seconds\n\n // Media library state\n readonly showMediaLibrary = signal<boolean>(false);\n private mediaLibraryTargetTrackId: string | null = null;\n\n // Clipboard state for copy/paste functionality\n private readonly clipboardItem = signal<MediaItem | null>(null);\n private readonly clipb************ackId = signal<string | null>(null);\n\n // Computed: whether a media item is in clipboard\n readonly hasClipboardItem = computed(() => {\n return this.clipboardItem() !== null;\n });\n\n // Render loop ID for cleanup\n private renderLoopId: number | null = null;\n\n constructor(\n private dragDropService: TimelineDragDropService,\n public playbackService: PlaybackService,\n private storageService: TimelineStorageService\n ) {\n // Load saved state from LocalStorage on initialization\n const savedState = this.storageService.loadState();\n if (savedState) {\n this.state.set(savedState);\n }\n\n // Effect to sync playhead position from PlaybackService during playback\n effect(() => {\n if (this.playbackService.isPlaying()) {\n const position = this.playbackService.playheadPosition();\n this.state.update(s => ({\n ...s,\n playheadPosition: position\n }));\n }\n });\n\n // Effect to auto-save timeline state to LocalStorage on any change\n effect(() => {\n const currentState = this.state();\n this.storageService.saveState(currentState);\n });\n }\n\n ngAfterViewInit(): void {\n // Initialize canvas for preview rendering\n if (this.previewCanvas) {\n this.playbackService.setCanvas(this.previewCanvas.nativeElement);\n }\n\n // Start continuous render loop for preview (renders current frame even when paused)\n this.startRenderLoop();\n\n // Synchronize media and render initial frame if state was loaded from LocalStorage\n const currentState = this.state();\n if (currentState.tracks.length > 0) {\n this.playbackService.seek(currentState.tracks, currentState.playheadPosition);\n }\n }\n\n ngOnDestroy(): void {\n // Clean up render loop\n if (this.renderLoopId !== null) {\n cancelAnimationFrame(this.renderLoopId);\n this.renderLoopId = null;\n }\n\n // Stop playback\n this.playbackService.stop();\n }\n\n /**\n * Continuous render loop for preview canvas.\n * Keeps rendering even when paused so seeking updates the preview.\n */\n private startRenderLoop(): void {\n const render = () => {\n // Only render if we have active media and are not playing\n // (PlaybackService handles rendering during playback)\n if (!this.playbackService.isPlaying()) {\n this.playbackService.renderCurrentFrame();\n }\n this.renderLoopId = requestAnimationFrame(render);\n };\n this.renderLoopId = requestAnimationFrame(render);\n }\n\n // Track management\n addTrack(): void {\n const currentState = this.state();\n const newTrack: Track = {\n id: `track-${Date.now()}`,\n name: `Track ${currentState.tracks.length + 1}`,\n order: currentState.tracks.length,\n items: []\n };\n\n this.state.update(s => ({\n ...s,\n tracks: [...s.tracks, newTrack]\n }));\n\n // Show notification for adding track\n this.notificationsComponent?.showNotification(\n `Track \"${newTrack.name}\" added.`,\n 'success'\n );\n }\n\n removeTrack(trackId: string): void {\n const currentState = this.state();\n if (currentState.tracks.length <= 1) {\n return; // Keep at least one track\n }\n\n // Get track name before removing\n const trackToRemove = currentState.tracks.find(t => t.id === trackId);\n const trackName = trackToRemove?.name || 'Track';\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.filter(t => t.id !== trackId)\n }));\n\n // Show notification for removing track\n this.notificationsComponent?.showNotification(\n `Track \"${trackName}\" removed.`,\n 'info'\n );\n }\n\n // Zoom controls\n zoomIn(): void {\n this.state.update(s => ({\n ...s,\n zoomLevel: Math.min(s.zoomLevel + this.ZOOM_STEP, this.MAX_ZOOM)\n }));\n }\n\n zoomOut(): void {\n this.state.update(s => ({\n ...s,\n zoomLevel: Math.max(s.zoomLevel - this.ZOOM_STEP, this.MIN_ZOOM)\n }));\n }\n\n // Utility method to extract coordinates from mouse or touch events\n private getEventCoordinates(event: MouseEvent | TouchEvent): { clientX: number; clientY: number } {\n if (event instanceof MouseEvent) {\n return { clientX: event.clientX, clientY: event.clientY };\n } else {\n const touch = event.touches[0] || event.changedTouches[0];\n return { clientX: touch.clientX, clientY: touch.clientY };\n }\n }\n\n // Playhead controls\n onRulerPointerDown(event: MouseEvent | TouchEvent): void {\n event.preventDefault();\n this.isDraggingFromRuler = true;\n\n // Immediately update position on pointer down\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n const coords = this.getEventCoordinates(event);\n // Calculate position within the ruler element\n // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n const x = coords.clientX - rect.left;\n const newPosition = x / this.pixelsPerMillisecond();\n const currentState = this.state();\n const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n\n this.state.update(s => ({\n ...s,\n playheadPosition: clampedPosition\n }));\n\n // Sync position to playback service for seeking\n this.playbackService.seek(currentState.tracks, clampedPosition);\n }\n\n onPlayheadPointerDown(event: MouseEvent | TouchEvent): void {\n event.preventDefault();\n event.stopPropagation();\n this.isDraggingPlayhead = true;\n }\n\n\n // Media item drag and drop\n onMediaItemPointerDown(event: MouseEvent | TouchEvent, item: MediaItem, track: Track): void {\n const target = event.target as HTMLElement;\n\n // Check if clicking/touching on resize handle\n if (target.classList.contains('resize-handle')) {\n this.resizingItem = {\n item,\n edge: target.classList.contains('resize-handle-left') ? 'left' : 'right'\n };\n event.preventDefault();\n return;\n }\n\n const coords = this.getEventCoordinates(event);\n this.mouseDownPosition = { x: coords.clientX, y: coords.clientY };\n\n const mediaItemElement = event.currentTarget as HTMLElement;\n const rect = mediaItemElement.getBoundingClientRect();\n const clickX = coords.clientX - rect.left;\n\n // Convert pixel offset to time offset\n this.dragOffsetTime = clickX / this.pixelsPerMillisecond();\n\n this.draggedItem = item;\n this.draggedItemOriginalTrackId = track.id;\n event.preventDefault();\n }\n\n onTrackPointerDown(event: MouseEvent | TouchEvent): void {\n // Deselect when clicking/touching track background (not on media item)\n const target = event.target as HTMLElement;\n if (target.classList.contains('track')) {\n this.deselectMediaItem();\n }\n }\n\n onTrackPointerMove(event: MouseEvent | TouchEvent, track: Track): void {\n if (this.resizingItem) {\n this.handleResize(event, track);\n return;\n }\n event.preventDefault();\n event.stopPropagation();\n\n if (!this.draggedItem) return;\n\n const coords = this.getEventCoordinates(event);\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n const x = coords.clientX - rect.left;\n const requestedStartTime = Math.max(0, x / this.pixelsPerMillisecond() - this.dragOffsetTime);\n\n this.state.update(s => {\n const updatedTracks = s.tracks.map(t => {\n if (t.id === track.id) {\n // Get all items except the dragged one for collision detection\n const otherItems = t.items.filter(i => i.id !== this.draggedItem!.id);\n\n // Fix for issue #81: Find snap targets (playhead and items on all tracks)\n const snapTargets = this.dragDropService.findSnapTargets(\n this.draggedItem!.id,\n s.tracks,\n s.playheadPosition\n );\n\n // Calculate valid position and duration considering collisions, gap fitting, and snapping\n const validPosition = this.dragDropService.getValidDragPosition(\n this.draggedItem!,\n requestedStartTime,\n otherItems,\n s.totalDuration,\n snapTargets\n );\n\n // Check if item already exists in this track\n const itemExists = t.items.some(i => i.id === this.draggedItem!.id);\n\n if (itemExists) {\n // Update position and duration in current track\n return {\n ...t,\n items: t.items.map(i =>\n i.id === this.draggedItem!.id\n ? {\n ...i,\n startTime: validPosition.startTime,\n duration: validPosition.duration,\n trackId: track.id\n }\n : i\n )\n };\n } else {\n // Add to new track with adjusted position and duration\n return {\n ...t,\n items: [\n ...otherItems,\n {\n ...this.draggedItem!,\n startTime: validPosition.startTime,\n duration: validPosition.duration,\n trackId: track.id\n }\n ]\n };\n }\n } else if (t.id === this.draggedItemOriginalTrackId && t.id !== track.id) {\n // Remove from original track only if moving to different track\n return {\n ...t,\n items: t.items.filter(i => i.id !== this.draggedItem!.id)\n };\n }\n return t;\n });\n\n // Update the original track ID to current track for smooth dragging within same track\n this.draggedItemOriginalTrackId = track.id;\n\n return { ...s, tracks: updatedTracks };\n });\n }\n\n private handleResize(event: MouseEvent | TouchEvent, track: Track): void {\n if (!this.resizingItem) return;\n\n const coords = this.getEventCoordinates(event);\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n // Fix for issue #83: getBoundingClientRect() returns viewport-relative coordinates,\n // and coords.clientX is also viewport-relative, so we don't need to add scrollLeft\n const x = coords.clientX - rect.left;\n const timeAtCursor = x / this.pixelsPerMillisecond();\n\n this.state.update(s => {\n // Fix for issue #87: Find snap targets for resize operations\n const snapTargets = this.dragDropService.findSnapTargets(\n this.resizingItem!.item.id,\n s.tracks,\n s.playheadPosition\n );\n\n const updatedTracks = s.tracks.map(t => {\n if (t.id === track.id) {\n // Get resize bounds considering adjacent items\n const bounds = this.dragDropService.getResizeBounds(\n this.resizingItem!.item,\n t.items,\n this.resizingItem!.edge,\n s.totalDuration\n );\n\n return {\n ...t,\n items: t.items.map(i => {\n if (i.id === this.resizingItem!.item.id) {\n if (this.resizingItem!.edge === 'left') {\n // Fix for issue #89: Handle mediaStartTime when resizing from left\n // Apply snapping to left edge (start time)\n let newStartTime = Math.max(\n bounds.minTime,\n Math.min(timeAtCursor, bounds.maxTime)\n );\n\n // Apply snapping if within snap distance\n let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n for (const target of snapTargets) {\n const distance = Math.abs(newStartTime - target);\n if (distance < minDistance) {\n minDistance = distance;\n // Only snap if within bounds\n if (target >= bounds.minTime && target <= bounds.maxTime) {\n newStartTime = target;\n }\n }\n }\n\n // Calculate how much the timeline position is changing\n const deltaTime = newStartTime - i.startTime;\n const newDuration = i.duration - deltaTime;\n\n // Update media start time (trimming from source media)\n const curre***********tTime = i.mediaStartTime || 0;\n const newMediaStartTime = curre***********tTime + deltaTime;\n\n // Check if we're trying to extend beyond the start of source media\n if (newMediaStartTime < 0) {\n // Can only extend left by curre***********tTime amount\n const maxExtension = currentMediaStartTime;\n const finalStartTime = i.startTime - maxExtension;\n const finalDuration = i.duration + maxExtension;\n\n // Ensure we don't exceed maxDuration\n if (i.maxDuration && finalDuration > i.maxDuration) {\n return {\n ...i,\n startTime: finalStartTime + (finalDuration - i.maxDuration),\n duration: i.maxDuration,\n mediaStartTime: 0\n };\n }\n\n return {\n ...i,\n startTime: finalStartTime,\n duration: finalDuration,\n mediaStartTime: 0\n };\n }\n\n // Ensure media end doesn't exceed maxDuration\n if (i.maxDuration && newMediaStartTime + newDuration > i.maxDuration) {\n const maxAllowedDuration = i.maxDuration - newMediaStartTime;\n return {\n ...i,\n startTime: i.startTime + (i.duration - maxAllowedDuration),\n duration: maxAllowedDuration,\n mediaStartTime: newMediaStartTime\n };\n }\n\n return {\n ...i,\n startTime: newStartTime,\n duration: newDuration,\n mediaStartTime: newMediaStartTime\n };\n } else {\n // Fix for issue #87: Apply snapping to right edge (end time)\n let newEndTime = Math.max(\n bounds.minTime,\n Math.min(timeAtCursor, bounds.maxTime)\n );\n\n // Apply snapping if within snap distance\n let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n for (const target of snapTargets) {\n const distance = Math.abs(newEndTime - target);\n if (distance < minDistance) {\n minDistance = distance;\n // Only snap if within bounds\n if (target >= bounds.minTime && target <= bounds.maxTime) {\n newEndTime = target;\n }\n }\n }\n\n const newDuration = newEndTime - i.startTime;\n\n // Limit duration by maxDuration if specified\n const limitedDuration = i.maxDuration\n ? Math.min(newDuration, i.maxDuration)\n : newDuration;\n\n return { ...i, duration: limitedDuration };\n }\n }\n return i;\n })\n };\n }\n return t;\n });\n\n return { ...s, tracks: updatedTracks };\n });\n }\n\n onPointerUp(event: MouseEvent | TouchEvent): void {\n // Detect if this was a click/tap (not a drag) on a media item\n if (this.draggedItem && this.mouseDownPosition) {\n const coords = this.getEventCoordinates(event);\n const dx = coords.clientX - this.mouseDownPosition.x;\n const dy = coords.clientY - this.mouseDownPosition.y;\n const distance = Math.sqrt(dx * dx + dy * dy);\n\n // If pointer moved less than 5 pixels, consider it a click/tap\n if (distance < 5) {\n this.selectMediaItem(this.draggedItem.id);\n }\n }\n\n this.draggedItem = null;\n this.draggedItemOriginalTrackId = null;\n this.dragOffsetTime = 0;\n this.isDraggingPlayhead = false;\n this.isDraggingFromRuler = false;\n this.resizingItem = null;\n this.mouseDownPosition = null;\n }\n\n onDocumentPointerMove(event: MouseEvent | TouchEvent): void {\n if (this.isDraggingPlayhead || this.isDraggingFromRuler) {\n // Fix for issue #50: Use ViewChild reference to ensure we use the exact same element as onRulerPointerDown\n if (!this.timelineRuler) {\n return;\n }\n\n const coords = this.getEventCoordinates(event);\n const rulerElement = this.timelineRuler.nativeElement;\n // Use the same calculation as onRulerPointerDown\n // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n const rect = rulerElement.getBoundingClientRect();\n const x = coords.clientX - rect.left;\n const newPosition = x / this.pixelsPerMillisecond();\n const currentState = this.state();\n const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n\n this.state.update(s => ({\n ...s,\n playheadPosition: clampedPosition\n }));\n\n // Sync position to playback service for seeking (but don't call too frequently during drag)\n this.playbackService.seek(currentState.tracks, clampedPosition);\n }\n\n // Fix for issue #96: Handle media item dragging and resizing at document level for touch events\n // This allows dragging between tracks on mobile devices\n if (event instanceof TouchEvent) {\n if (this.draggedItem) {\n // Find which track the touch is currently over\n const targetTrack = this.findTrackAtCoordinates(this.getEventCoordinates(event));\n if (targetTrack) {\n // Reuse existing drag logic\n this.onTrackPointerMove(event, targetTrack);\n }\n } else if (this.resizingItem) {\n // Find the track that contains the resizing item\n const targetTrack = this.findTrackContainingItem(this.resizingItem.item.id);\n if (targetTrack) {\n // Reuse existing resize logic\n this.handleResize(event, targetTrack);\n }\n }\n }\n }\n\n // Helper method to find which track is at the given Y coordinate\n private findTrackAtCoordinates(coords: { clientX: number; clientY: number }): Track | null {\n const trackElements = document.querySelectorAll('.track');\n for (const trackElement of Array.from(trackElements)) {\n const rect = trackElement.getBoundingClientRect();\n if (coords.clientY >= rect.top && coords.clientY <= rect.bottom) {\n const trackIndex = Array.from(trackElements).indexOf(trackElement);\n const tracks = this.state().tracks;\n if (trackIndex >= 0 && trackIndex < tracks.length) {\n return tracks[trackIndex];\n }\n }\n }\n return null;\n }\n\n // Helper method to find the track containing a specific item\n private findTrackContainingItem(itemId: string): Track | null {\n const currentState = this.state();\n for (const track of currentState.tracks) {\n if (track.items.some(item => item.id === itemId)) {\n return track;\n }\n }\n return null;\n }\n\n // Helper methods\n getItemStyle(item: MediaItem) {\n return {\n left: `${item.startTime * this.pixelsPerMillisecond()}px`,\n width: `${item.duration * this.pixelsPerMillisecond()}px`\n };\n }\n\n getMediaTypeClass(type: MediaType): string {\n return `media-${type}`;\n }\n\n formatTime(milliseconds: number): string {\n const seconds = Math.floor(milliseconds / 1000);\n const minutes = Math.floor(seconds / 60);\n const remainingSeconds = seconds % 60;\n const cs = Math.floor((milliseconds % 1000) / 10);\n return `${minutes}:${remainingSeconds.toString().padStart(2, '0')}.${cs.toString().padStart(2, '0')}`;\n }\n\n /**\n * Calculate appropriate time interval for markers based on zoom level\n * to prevent marker labels from overlapping\n */\n private getMarkerInterval(): number {\n // Minimum spacing between markers in pixels to prevent overlap\n // Enough space for \"0:00.000\" text (about 50-60px)\n const MIN_M***********NG_PX = 60;\n\n // Calculate how much time represents MIN_M***********NG_PX at current zoom\n const pixelsPerMs = this.pixelsPerMillisecond();\n const minTimeSpacing = MIN_M***********NG_PX / pixelsPerMs;\n\n // Define possible intervals (in ms): 100ms, 250ms, 500ms, 1s, 2s, 5s, 10s, 30s, 60s\n const intervals = [100, 250, 500, 1000, 2000, 5000, 10000, 30000, 60000];\n\n // Find the smallest interval that's larger than or equal to minTimeSpacing\n for (const interval of intervals) {\n if (interval >= minTimeSpacing) {\n return interval;\n }\n }\n\n // If even 60s is too small, use larger intervals\n return Math.ceil(minTimeSpacing / 60000) * 60000;\n }\n\n getTimeMarkers(): { position: number; label: string }[] {\n const markers: { position: number; label: string }[] = [];\n const stepMs = this.getMarkerInterval(); // Dynamic interval based on zoom level\n\n // Fix for issue #85: Do not show the last time mark at totalDuration\n // to prevent container expansion from the text label\n for (let time = 0; time < this.state().totalDuration; time += stepMs) {\n markers.push({\n position: time * this.pixelsPerMillisecond(),\n label: this.formatTime(time)\n });\n }\n\n return markers;\n }\n\n // Add placeholder media item\n addMediaItem(type: MediaType, trackId: string): void {\n const currentState = this.state();\n const track = currentState.tracks.find(t => t.id === trackId);\n\n if (!track) return;\n\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n const newItemDuration = type === MediaType.IMAGE ? 5000 : 3000;\n\n // Determine the start time for the new item using the service\n const startTime = this.dragDropService.calculateNewItemStartTime(\n playheadTime,\n track.items,\n this.SNAP_PROXIMITY_MS\n );\n\n // Fix for issue #48: Ensure new item doesn't exceed totalDuration\n const maxAllowedDuration = totalDuration - startTime;\n const finalDuration = Math.min(newItemDuration, maxAllowedDuration);\n\n // Fix for issue #64: Verify that the new item doesn't overlap with any existing items\n const testItem: MediaItem = {\n id: 'temp',\n type,\n startTime,\n duration: finalDuration,\n trackId,\n name: '',\n isPlaceholder: true\n };\n\n // Validate and adjust position if needed\n const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n\n // Recalculate duration limit if position was adjusted\n const adjus****************ation = totalDuration - validatedStartTime;\n const adjustedDuration = Math.min(newItemDuration, adjustedMaxAllowedDuration);\n\n // Create the final non-overlapping item\n const newItem: MediaItem = {\n id: `item-${Date.now()}`,\n type,\n startTime: validatedStartTime,\n duration: adjustedDuration,\n trackId,\n name: `${type} placeholder`,\n isPlaceholder: true\n };\n\n // Set maxDuration for audio and video placeholders\n if (type === MediaType.VIDEO) {\n newItem.maxDuration = Math.min(10000, adjustedMaxAllowedDuration); // 10 seconds default for video\n } else if (type === MediaType.AUDIO) {\n newItem.maxDuration = Math.min(15000, adjustedMaxAllowedDuration); // 15 seconds default for audio\n }\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === trackId\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n // Show notification for adding media\n this.notificationsComponent?.showNotification(\n 'Media added to timeline.',\n 'success'\n );\n }\n\n removeMediaItem(itemId: string, trackId: string): void {\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === trackId\n ? { ...t, items: t.items.filter(i => i.id !== itemId) }\n : t\n ),\n // Deselect if removing selected item\n selectedItemId: s.selectedItemId === itemId ? null : s.selectedItemId\n }));\n\n // Show notification for removing media\n this.notificationsComponent?.showNotification(\n 'Media removed from timeline.',\n 'info'\n );\n }\n\n // Media selection\n selectMediaItem(itemId: string): void {\n this.state.update(s => ({\n ...s,\n selectedItemId: itemId\n }));\n }\n\n deselectMediaItem(): void {\n this.state.update(s => ({\n ...s,\n selectedItemId: null\n }));\n }\n\n isItemSelected(itemId: string): boolean {\n return this.state().selectedItemId === itemId;\n }\n\n readonly MediaType = MediaType;\n\n /**\n * Create a new project by clearing the timeline and LocalStorage\n */\n newProject(): void {\n // Stop playback if playing\n if (this.playbackService.isPlaying()) {\n this.playbackService.stop();\n this.isPlaying.set(false);\n }\n\n // Reset timeline state to initial values\n this.state.set({\n tracks: [\n { id: '1', name: 'Track 1', order: 0, items: [] },\n { id: '2', name: 'Track 2', order: 1, items: [] }\n ],\n playheadPosition: 0,\n zoomLevel: 50,\n totalDuration: 120000,\n selectedItemId: null\n });\n\n // Clear LocalStorage\n this.storageService.clearState();\n\n // Show notification\n this.notificationsComponent?.showNotification(\n 'New project created. Timeline cleared.',\n 'success'\n );\n }\n\n // Video preview controls\n togglePlayback(): void {\n const currentState = this.state();\n\n if (this.playbackService.isPlaying()) {\n this.playbackService.pause();\n this.isPlaying.set(false);\n } else {\n // Sync playhead position to PlaybackService before starting\n this.playbackService.setPlayheadPosition(currentState.playheadPosition);\n this.playbackService.play(currentState.tracks, currentState.totalDuration);\n this.isPlaying.set(true);\n }\n }\n\n skipBackward(): void {\n const currentState = this.state();\n const newPosition = Math.max(0, currentState.playheadPosition - 5000);\n\n this.state.update(s => ({\n ...s,\n playheadPosition: newPosition\n }));\n\n // Sync position and update media\n this.playbackService.seek(currentState.tracks, newPosition);\n }\n\n skipForward(): void {\n const currentState = this.state();\n const newPosition = Math.min(currentState.totalDuration, currentState.playheadPosition + 5000);\n\n this.state.update(s => ({\n ...s,\n playheadPosition: newPosition\n }));\n\n // Sync position and update media\n this.playbackService.seek(currentState.tracks, newPosition);\n }\n\n // Duration editor methods\n openDurationEditor(): void {\n this.editedDuration = this.state().totalDuration / 1000;\n this.showDurationEditor.set(true);\n }\n\n closeDurationEditor(): void {\n this.showDurationEditor.set(false);\n }\n\n onDurationInputChange(event: Event): void {\n const input = event.target as HTMLInputElement;\n const value = parseFloat(input.value);\n if (!isNaN(value) && value > 0) {\n this.editedDuration = value;\n }\n }\n\n saveDuration(): void {\n const newDurationMs = Math.max(1000, this.editedDuration * 1000); // At least 1 second\n this.state.update(s => ({\n ...s,\n totalDuration: newDurationMs,\n // Ensure playhead doesn't exceed new duration\n playheadPosition: Math.min(s.playheadPosition, newDurationMs)\n }));\n this.closeDurationEditor();\n }\n\n // Media library methods\n openMediaLibrary(trackId: string): void {\n this.mediaLibraryTargetTrackId = trackId;\n this.showMediaLibrary.set(true);\n }\n\n closeMediaLibrary(): void {\n this.showMediaLibrary.set(false);\n this.mediaLibraryTargetTrackId = null;\n }\n\n onMediaSelected(media: MediaLibraryItem): void {\n if (!this.mediaLibraryTargetTrackId) return;\n\n const currentState = this.state();\n const track = currentState.tracks.find(t => t.id === this.mediaLibraryTargetTrackId);\n\n if (!track) return;\n\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n\n // Determine the start time for the new item using the service\n const startTime = this.dragDropService.calculateNewItemStartTime(\n playheadTime,\n track.items,\n this.SNAP_PROXIMITY_MS\n );\n\n // Ensure item doesn't exceed totalDuration\n const maxAllowedDuration = totalDuration - startTime;\n const finalDuration = Math.min(media.duration, maxAllowedDuration);\n\n // Verify that the new item doesn't overlap with any existing items\n const testItem: MediaItem = {\n id: 'temp',\n type: media.type,\n startTime,\n duration: finalDuration,\n trackId: this.mediaLibraryTargetTrackId,\n name: '',\n isPlaceholder: false\n };\n\n // Validate and adjust position if needed\n const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n\n // Recalculate duration limit if position was adjusted\n const adjus****************ation = totalDuration - validatedStartTime;\n const adjustedDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n\n // Create the final non-overlapping item\n const newItem: MediaItem = {\n id: `item-${Date.now()}`,\n type: media.type,\n startTime: validatedStartTime,\n duration: adjustedDuration,\n trackId: this.mediaLibraryTargetTrackId,\n name: media.name,\n url: media.url, // Pass URL from media library for playback\n isPlaceholder: false\n };\n\n // Set maxDuration for audio and video\n if (media.type === MediaType.VIDEO) {\n newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n } else if (media.type === MediaType.AUDIO) {\n newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n }\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === this.mediaLibraryTargetTrackId\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n // Show notification for adding media\n this.notificationsComponent?.showNotification(\n `\"${media.name}\" added to timeline.`,\n 'success'\n );\n\n // Close the media library after selection\n this.closeMediaLibrary();\n }\n\n /**\n * Trim (split) the selected media item at the playhead position.\n * Creates two separate items from the original media.\n */\n trimSelectedMedia(): void {\n const currentState = this.state();\n const selectedItemId = currentState.selectedItemId;\n\n if (!selectedItemId) {\n return;\n }\n\n // Find the selected item and its track\n let selectedItem: MediaItem | null = null;\n let selectedTrack: Track | null = null;\n\n for (const track of currentState.tracks) {\n const item = track.items.find(i => i.id === selectedItemId);\n if (item) {\n selectedItem = item;\n selectedTrack = track;\n break;\n }\n }\n\n if (!selectedItem || !selectedTrack) {\n return;\n }\n\n const playheadTime = currentState.playheadPosition;\n const itemStart = selectedItem.startTime;\n const itemEnd = itemStart + selectedItem.duration;\n\n // Check if playhead is within the selected media item\n if (playheadTime <= itemStart || playheadTime >= itemEnd) {\n // Playhead is not within the selected media - show notification\n this.notificationsComponent?.showNotification(\n 'Position the playhead within the selected media to trim it.',\n 'warning'\n );\n return;\n }\n\n // Ensure both parts will have at least MIN_ITEM_DURATION\n const firstPartDuration = playheadTime - itemStart;\n const secondPartDuration = itemEnd - playheadTime;\n\n if (firstPartDuration < this.MIN_ITEM_DURATION || secondPartDuration < this.MIN_ITEM_DURATION) {\n this.notificationsComponent?.showNotification(\n 'Cannot trim: resulting parts would be too short.',\n 'warning'\n );\n return;\n }\n\n // Calculate mediaStartTime adjustments\n const origi************tTime = selectedItem.mediaStartTime || 0;\n const secon**************tTime = origi************tTime + firstPartDuration;\n\n // Create two new items from the original\n const firstPart: MediaItem = {\n ...selectedItem,\n id: `item-${Date.now()}-1`,\n duration: firstPartDuration\n // mediaStartTime stays the same for first part\n };\n\n const secondPart: MediaItem = {\n ...selectedItem,\n id: `item-${Date.now()}-2`,\n startTime: playheadTime,\n duration: secondPartDuration,\n mediaStartTime: secondPartMediaStartTime\n };\n\n // Update the state: remove original, add two new parts\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t => {\n if (t.id === selectedTrack!.id) {\n return {\n ...t,\n items: [\n ...t.items.filter(i => i.id !== selectedItemId),\n firstPart,\n secondPart\n ]\n };\n }\n return t;\n }),\n // Deselect after trimming\n selectedItemId: null\n }));\n\n this.notificationsComponent?.showNotification(\n 'Media trimmed successfully.',\n 'success'\n );\n }\n\n /**\n * Copy the selected media item to the clipboard.\n * Stores a copy of the item and the track it was copied from.\n */\n copySelectedMedia(): void {\n const currentState = this.state();\n const selectedItemId = currentState.selectedItemId;\n\n if (!selectedItemId) {\n return;\n }\n\n // Find the selected item and its track\n let selectedItem: MediaItem | null = null;\n let selectedTrackId: string | null = null;\n\n for (const track of currentState.tracks) {\n const item = track.items.find(i => i.id === selectedItemId);\n if (item) {\n selectedItem = item;\n selectedTrackId = track.id;\n break;\n }\n }\n\n if (!selectedItem || !selectedTrackId) {\n return;\n }\n\n // Store a copy of the item in clipboard\n this.clipboardItem.set({ ...selectedItem });\n this.clipboardSourceTrackId.set(selectedTrackId);\n\n this.notificationsComponent?.showNotification(\n 'Media copied to clipboard.',\n 'success'\n );\n }\n\n /**\n * Paste the clipboard media item at the playhead position.\n * Pastes on the same track where the item was copied from.\n * If there's no space at playhead position, finds the next available slot.\n */\n pasteMedia(): void {\n const copiedItem = this.clipboardItem();\n const sourceTrackId = this.clipboardSourceTrackId();\n\n if (!copiedItem || !sourceTrackId) {\n return;\n }\n\n const currentState = this.state();\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n\n // Find the source track\n let targetTrack = currentState.tracks.find(t => t.id === sourceTrackId);\n\n // If source track no longer exists, use the first track\n if (!targetTrack) {\n targetTrack = currentState.tracks[0];\n if (!targetTrack) {\n this.notificationsComponent?.showNotification(\n 'No tracks available to paste media.',\n 'error'\n );\n return;\n }\n }\n\n const itemDuration = copiedItem.duration;\n\n // Try to find a valid position starting from playhead\n const pastePosition = this.findPastePosition(\n playheadTime,\n itemDuration,\n targetTrack.items,\n totalDuration\n );\n\n if (pastePosition === null) {\n this.notificationsComponent?.showNotification(\n 'No space available to paste media on this track.',\n 'warning'\n );\n return;\n }\n\n // Create a new item with a new ID\n const newItem: MediaItem = {\n ...copiedItem,\n id: `item-${Date.now()}`,\n startTime: pastePosition,\n trackId: targetTrack.id\n };\n\n // Add the new item to the track\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === targetTrack!.id\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n this.notificationsComponent?.showNotification(\n 'Media pasted successfully.',\n 'success'\n );\n }\n\n /**\n * Find a valid position to paste media item.\n * First tries at the playhead position, then finds the next available gap.\n */\n private findPastePosition(\n preferredPosition: number,\n duration: number,\n existingItems: MediaItem[],\n totalDuration: number\n ): number | null {\n // Check if we can fit at the preferred position (playhead)\n if (this.canFitAtPosition(preferredPosition, duration, existingItems, totalDuration)) {\n return preferredPosition;\n }\n\n // Sort existing items by start time\n const sortedItems = [...existingItems].sort((a, b) => a.startTime - b.startTime);\n\n // Find all gaps on the track and try to place the item\n const gaps = this.dragDropService.findAllGaps(sortedItems);\n\n // First, try to find a gap that starts at or after the playhead\n for (const gap of gaps) {\n // Calculate actual gap size (considering totalDuration for infinite gaps)\n const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n const gapSize = effectiveGapEnd - gap.gapStart;\n\n if (gap.gapStart >= preferredPosition && gapSize >= duration) {\n return gap.gapStart;\n }\n }\n\n // If no gap after playhead, try any gap that can fit the item\n for (const gap of gaps) {\n // Calculate actual gap size (considering totalDuration for infinite gaps)\n const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n const gapSize = effectiveGapEnd - gap.gapStart;\n\n if (gapSize >= duration) {\n return gap.gapStart;\n }\n }\n\n // No suitable position found\n return null;\n }\n\n /**\n * Check if an item can fit at a specific position without overlapping.\n */\n private canFitAtPosition(\n position: number,\n duration: number,\n existingItems: MediaItem[],\n totalDuration: number\n ): boolean {\n // Check bounds\n if (position < 0 || position + duration > totalDuration) {\n return false;\n }\n\n // Check for overlaps with existing items\n const endPosition = position + duration;\n for (const item of existingItems) {\n const itemEnd = item.startTime + item.duration;\n // Check if there's an overlap\n if (position < itemEnd && endPosition > item.startTime) {\n return false;\n }\n }\n\n return true;\n }\n}\n","structuredPatch":[{"oldStart":1,"oldLines":4,"newStart":1,"newLines":4,"lines":["-import { Component, signal, computed, ViewChild, ElementRef, AfterViewInit, OnDestroy, effect } from '@angular/core';","+import { Component, signal, computed, ViewChild, ElementRef, AfterViewInit, OnDestroy, effect, HostListener } from '@angular/core';"," import { CommonModule } from '@angular/common';"," import { MediaType, MediaItem, Track, TimelineState } from '../../models/timeline.models';"," import { MediaLibraryComponent, MediaLibraryItem } from '../media-library/media-library.component';"]},{"oldStart":7,"oldLines":6,"newStart":7,"newLines":7,"lines":[" import { Timel*************rvice } from '../../services/timeline-drag-drop.service';"," import { PlaybackService } from '../../services/playback.service';"," import { Timel************rvice } from '../../services/timeline-storage.service';","+import { Timel************rvice } from '../../services/timeline-history.service';"," "," @Component({"," selector: 'app-timeline',"]}],"userModified":false,"replaceAll":false}}
[2025-12-22T21:47:44.834Z] [INFO] {
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"content": [
{
"type": "text",
"text": "Now let me update the constructor to inject the history service:"
}
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[2025-12-22T21:47:47.647Z] [INFO] {
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{
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"file_path": "/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts",
"old_string": " constructor(\n private dragDropService: TimelineDragDropService,\n public playbackService: PlaybackService,\n private storageService: TimelineStorageService\n ) {",
"new_string": " constructor(\n private dragDropService: TimelineDragDropService,\n public playbackService: PlaybackService,\n private storageService: TimelineStorageService,\n private historyService: TimelineHistoryService\n ) {"
}
}
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[2025-12-22T21:47:47.752Z] [INFO] {
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{
"tool_use_id": "toolu_01VFVtbNj1qxDFrKjdSEG6rY",
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"content": "The file /tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts has been updated. Here's the result of running `cat -n` on a snippet of the edited file:\n 117→\n 118→ // Render loop ID for cleanup\n 119→ private renderLoopId: number | null = null;\n 120→\n 121→ constructor(\n 122→ private dragDropService: TimelineDragDropService,\n 123→ public playbackService: PlaybackService,\n 124→ private storageService: TimelineStorageService,\n 125→ private historyService: TimelineHistoryService\n 126→ ) {\n 127→ // Load saved state from LocalStorage on initialization\n 128→ const savedState = this.storageService.loadState();\n 129→ if (savedState) {\n 130→ this.state.set(savedState);"
}
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"filePath": "/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts",
"oldString": " constructor(\n private dragDropService: TimelineDragDropService,\n public playbackService: PlaybackService,\n private storageService: TimelineStorageService\n ) {",
"newString": " constructor(\n private dragDropService: TimelineDragDropService,\n public playbackService: PlaybackService,\n private storageService: TimelineStorageService,\n private historyService: TimelineHistoryService\n ) {",
"originalFile": "import { Component, signal, computed, ViewChild, ElementRef, AfterViewInit, OnDestroy, effect, HostListener } from '@angular/core';\nimport { CommonModule } from '@angular/common';\nimport { MediaType, MediaItem, Track, TimelineState } from '../../models/timeline.models';\nimport { MediaLibraryComponent, MediaLibraryItem } from '../media-library/media-library.component';\nimport { Media***********onent } from '../media-toolbar/media-toolbar.component';\nimport { Notif************onent } from '../notifications/notifications.component';\nimport { Timel*************rvice } from '../../services/timeline-drag-drop.service';\nimport { PlaybackService } from '../../services/playback.service';\nimport { Timel************rvice } from '../../services/timeline-storage.service';\nimport { Timel************rvice } from '../../services/timeline-history.service';\n\n@Component({\n selector: 'app-timeline',\n standalone: true,\n imports: [CommonModule, MediaLibraryComponent, MediaToolbarComponent, NotificationsComponent],\n templateUrl: './timeline.component.html',\n styleUrl: './timeline.component.css'\n})\nexport class TimelineComponent implements AfterViewInit, OnDestroy {\n // Zoom levels: pixels per second\n private readonly MIN_ZOOM = 10;\n private readonly MAX_ZOOM = 200;\n private readonly ZOOM_STEP = 20;\n readonly TRACK_HEADER_WIDTH = 150; // Width of track header in pixels\n private readonly SNAP_PROXIMITY_MS = 500; // Snap to item if playhead is within 500ms\n private readonly MIN_ITEM_DURATION = 100; // Minimum item duration in milliseconds\n\n // Canvas dimensions for preview\n readonly PREVIEW_WIDTH = 640;\n readonly PREVIEW_HEIGHT = 360;\n\n // View references\n @ViewChild('timelineRuler') timelineRuler?: ElementRef<HTMLElement>;\n @ViewChild('notifications') notificationsComponent?: NotificationsComponent;\n @ViewChild('previewCanvas') previewCanvas?: ElementRef<HTMLCanvasElement>;\n\n // Timeline state\n readonly state = signal<TimelineState>({\n tracks: [\n { id: '1', name: 'Track 1', order: 0, items: [] },\n { id: '2', name: 'Track 2', order: 1, items: [] }\n ],\n playheadPosition: 0,\n zoomLevel: 50, // pixels per second\n totalDuration: 120000, // 120 seconds in milliseconds\n selectedItemId: null\n });\n\n // Computed values\n readonly pixel**********econd = computed(() => {\n return this.state().zoomLevel / 1000;\n });\n\n readonly timelineWidth = computed(() => {\n const state = this.state();\n // Calculate the maximum end time across all tracks\n let maxEndTime = state.totalDuration;\n\n for (const track of state.tracks) {\n for (const item of track.items) {\n const itemEndTime = item.startTime + item.duration;\n if (itemEndTime > maxEndTime) {\n maxEndTime = itemEndTime;\n }\n }\n }\n\n return maxEndTime * this.pixelsPerMillisecond();\n });\n\n readonly timelineLineHeight = computed(() => {\n const state = this.state();\n return state.tracks.length * 60 + 32;\n });\n\n readonly playheadPosition = computed(() => {\n return this.state().playheadPosition * this.pixelsPerMillisecond();\n });\n\n readonly playh************ition = computed(() => {\n return this.playheadPosition() + this.TRACK_HEADER_WIDTH;\n });\n\n // Computed: whether a media item is currently selected\n readonly hasSelectedItem = computed(() => {\n return this.state().selectedItemId !== null;\n });\n\n // Dragging state\n private draggedItem: MediaItem | null = null;\n private draggedItemOriginalTrackId: string | null = null;\n private dragOffsetTime: number = 0; // Offset in milliseconds from item start to cursor position\n private isDraggingPlayhead = false;\n private isDraggingFromRuler = false;\n private resizingItem: { item: MediaItem; edge: 'left' | 'right' } | null = null;\n private mouseDownPosition: { x: number; y: number } | null = null; // Track mouse down position for click detection\n\n // Video preview state\n readonly isPlaying = signal<boolean>(false);\n\n // Duration editor state\n readonly showDurationEditor = signal<boolean>(false);\n private editedDuration: number = 120; // Duration in seconds\n\n // Media library state\n readonly showMediaLibrary = signal<boolean>(false);\n private mediaLibraryTargetTrackId: string | null = null;\n\n // Clipboard state for copy/paste functionality\n private readonly clipboardItem = signal<MediaItem | null>(null);\n private readonly clipb************ackId = signal<string | null>(null);\n\n // Computed: whether a media item is in clipboard\n readonly hasClipboardItem = computed(() => {\n return this.clipboardItem() !== null;\n });\n\n // Render loop ID for cleanup\n private renderLoopId: number | null = null;\n\n constructor(\n private dragDropService: TimelineDragDropService,\n public playbackService: PlaybackService,\n private storageService: TimelineStorageService\n ) {\n // Load saved state from LocalStorage on initialization\n const savedState = this.storageService.loadState();\n if (savedState) {\n this.state.set(savedState);\n }\n\n // Effect to sync playhead position from PlaybackService during playback\n effect(() => {\n if (this.playbackService.isPlaying()) {\n const position = this.playbackService.playheadPosition();\n this.state.update(s => ({\n ...s,\n playheadPosition: position\n }));\n }\n });\n\n // Effect to auto-save timeline state to LocalStorage on any change\n effect(() => {\n const currentState = this.state();\n this.storageService.saveState(currentState);\n });\n }\n\n ngAfterViewInit(): void {\n // Initialize canvas for preview rendering\n if (this.previewCanvas) {\n this.playbackService.setCanvas(this.previewCanvas.nativeElement);\n }\n\n // Start continuous render loop for preview (renders current frame even when paused)\n this.startRenderLoop();\n\n // Synchronize media and render initial frame if state was loaded from LocalStorage\n const currentState = this.state();\n if (currentState.tracks.length > 0) {\n this.playbackService.seek(currentState.tracks, currentState.playheadPosition);\n }\n }\n\n ngOnDestroy(): void {\n // Clean up render loop\n if (this.renderLoopId !== null) {\n cancelAnimationFrame(this.renderLoopId);\n this.renderLoopId = null;\n }\n\n // Stop playback\n this.playbackService.stop();\n }\n\n /**\n * Continuous render loop for preview canvas.\n * Keeps rendering even when paused so seeking updates the preview.\n */\n private startRenderLoop(): void {\n const render = () => {\n // Only render if we have active media and are not playing\n // (PlaybackService handles rendering during playback)\n if (!this.playbackService.isPlaying()) {\n this.playbackService.renderCurrentFrame();\n }\n this.renderLoopId = requestAnimationFrame(render);\n };\n this.renderLoopId = requestAnimationFrame(render);\n }\n\n // Track management\n addTrack(): void {\n const currentState = this.state();\n const newTrack: Track = {\n id: `track-${Date.now()}`,\n name: `Track ${currentState.tracks.length + 1}`,\n order: currentState.tracks.length,\n items: []\n };\n\n this.state.update(s => ({\n ...s,\n tracks: [...s.tracks, newTrack]\n }));\n\n // Show notification for adding track\n this.notificationsComponent?.showNotification(\n `Track \"${newTrack.name}\" added.`,\n 'success'\n );\n }\n\n removeTrack(trackId: string): void {\n const currentState = this.state();\n if (currentState.tracks.length <= 1) {\n return; // Keep at least one track\n }\n\n // Get track name before removing\n const trackToRemove = currentState.tracks.find(t => t.id === trackId);\n const trackName = trackToRemove?.name || 'Track';\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.filter(t => t.id !== trackId)\n }));\n\n // Show notification for removing track\n this.notificationsComponent?.showNotification(\n `Track \"${trackName}\" removed.`,\n 'info'\n );\n }\n\n // Zoom controls\n zoomIn(): void {\n this.state.update(s => ({\n ...s,\n zoomLevel: Math.min(s.zoomLevel + this.ZOOM_STEP, this.MAX_ZOOM)\n }));\n }\n\n zoomOut(): void {\n this.state.update(s => ({\n ...s,\n zoomLevel: Math.max(s.zoomLevel - this.ZOOM_STEP, this.MIN_ZOOM)\n }));\n }\n\n // Utility method to extract coordinates from mouse or touch events\n private getEventCoordinates(event: MouseEvent | TouchEvent): { clientX: number; clientY: number } {\n if (event instanceof MouseEvent) {\n return { clientX: event.clientX, clientY: event.clientY };\n } else {\n const touch = event.touches[0] || event.changedTouches[0];\n return { clientX: touch.clientX, clientY: touch.clientY };\n }\n }\n\n // Playhead controls\n onRulerPointerDown(event: MouseEvent | TouchEvent): void {\n event.preventDefault();\n this.isDraggingFromRuler = true;\n\n // Immediately update position on pointer down\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n const coords = this.getEventCoordinates(event);\n // Calculate position within the ruler element\n // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n const x = coords.clientX - rect.left;\n const newPosition = x / this.pixelsPerMillisecond();\n const currentState = this.state();\n const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n\n this.state.update(s => ({\n ...s,\n playheadPosition: clampedPosition\n }));\n\n // Sync position to playback service for seeking\n this.playbackService.seek(currentState.tracks, clampedPosition);\n }\n\n onPlayheadPointerDown(event: MouseEvent | TouchEvent): void {\n event.preventDefault();\n event.stopPropagation();\n this.isDraggingPlayhead = true;\n }\n\n\n // Media item drag and drop\n onMediaItemPointerDown(event: MouseEvent | TouchEvent, item: MediaItem, track: Track): void {\n const target = event.target as HTMLElement;\n\n // Check if clicking/touching on resize handle\n if (target.classList.contains('resize-handle')) {\n this.resizingItem = {\n item,\n edge: target.classList.contains('resize-handle-left') ? 'left' : 'right'\n };\n event.preventDefault();\n return;\n }\n\n const coords = this.getEventCoordinates(event);\n this.mouseDownPosition = { x: coords.clientX, y: coords.clientY };\n\n const mediaItemElement = event.currentTarget as HTMLElement;\n const rect = mediaItemElement.getBoundingClientRect();\n const clickX = coords.clientX - rect.left;\n\n // Convert pixel offset to time offset\n this.dragOffsetTime = clickX / this.pixelsPerMillisecond();\n\n this.draggedItem = item;\n this.draggedItemOriginalTrackId = track.id;\n event.preventDefault();\n }\n\n onTrackPointerDown(event: MouseEvent | TouchEvent): void {\n // Deselect when clicking/touching track background (not on media item)\n const target = event.target as HTMLElement;\n if (target.classList.contains('track')) {\n this.deselectMediaItem();\n }\n }\n\n onTrackPointerMove(event: MouseEvent | TouchEvent, track: Track): void {\n if (this.resizingItem) {\n this.handleResize(event, track);\n return;\n }\n event.preventDefault();\n event.stopPropagation();\n\n if (!this.draggedItem) return;\n\n const coords = this.getEventCoordinates(event);\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n const x = coords.clientX - rect.left;\n const requestedStartTime = Math.max(0, x / this.pixelsPerMillisecond() - this.dragOffsetTime);\n\n this.state.update(s => {\n const updatedTracks = s.tracks.map(t => {\n if (t.id === track.id) {\n // Get all items except the dragged one for collision detection\n const otherItems = t.items.filter(i => i.id !== this.draggedItem!.id);\n\n // Fix for issue #81: Find snap targets (playhead and items on all tracks)\n const snapTargets = this.dragDropService.findSnapTargets(\n this.draggedItem!.id,\n s.tracks,\n s.playheadPosition\n );\n\n // Calculate valid position and duration considering collisions, gap fitting, and snapping\n const validPosition = this.dragDropService.getValidDragPosition(\n this.draggedItem!,\n requestedStartTime,\n otherItems,\n s.totalDuration,\n snapTargets\n );\n\n // Check if item already exists in this track\n const itemExists = t.items.some(i => i.id === this.draggedItem!.id);\n\n if (itemExists) {\n // Update position and duration in current track\n return {\n ...t,\n items: t.items.map(i =>\n i.id === this.draggedItem!.id\n ? {\n ...i,\n startTime: validPosition.startTime,\n duration: validPosition.duration,\n trackId: track.id\n }\n : i\n )\n };\n } else {\n // Add to new track with adjusted position and duration\n return {\n ...t,\n items: [\n ...otherItems,\n {\n ...this.draggedItem!,\n startTime: validPosition.startTime,\n duration: validPosition.duration,\n trackId: track.id\n }\n ]\n };\n }\n } else if (t.id === this.draggedItemOriginalTrackId && t.id !== track.id) {\n // Remove from original track only if moving to different track\n return {\n ...t,\n items: t.items.filter(i => i.id !== this.draggedItem!.id)\n };\n }\n return t;\n });\n\n // Update the original track ID to current track for smooth dragging within same track\n this.draggedItemOriginalTrackId = track.id;\n\n return { ...s, tracks: updatedTracks };\n });\n }\n\n private handleResize(event: MouseEvent | TouchEvent, track: Track): void {\n if (!this.resizingItem) return;\n\n const coords = this.getEventCoordinates(event);\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n // Fix for issue #83: getBoundingClientRect() returns viewport-relative coordinates,\n // and coords.clientX is also viewport-relative, so we don't need to add scrollLeft\n const x = coords.clientX - rect.left;\n const timeAtCursor = x / this.pixelsPerMillisecond();\n\n this.state.update(s => {\n // Fix for issue #87: Find snap targets for resize operations\n const snapTargets = this.dragDropService.findSnapTargets(\n this.resizingItem!.item.id,\n s.tracks,\n s.playheadPosition\n );\n\n const updatedTracks = s.tracks.map(t => {\n if (t.id === track.id) {\n // Get resize bounds considering adjacent items\n const bounds = this.dragDropService.getResizeBounds(\n this.resizingItem!.item,\n t.items,\n this.resizingItem!.edge,\n s.totalDuration\n );\n\n return {\n ...t,\n items: t.items.map(i => {\n if (i.id === this.resizingItem!.item.id) {\n if (this.resizingItem!.edge === 'left') {\n // Fix for issue #89: Handle mediaStartTime when resizing from left\n // Apply snapping to left edge (start time)\n let newStartTime = Math.max(\n bounds.minTime,\n Math.min(timeAtCursor, bounds.maxTime)\n );\n\n // Apply snapping if within snap distance\n let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n for (const target of snapTargets) {\n const distance = Math.abs(newStartTime - target);\n if (distance < minDistance) {\n minDistance = distance;\n // Only snap if within bounds\n if (target >= bounds.minTime && target <= bounds.maxTime) {\n newStartTime = target;\n }\n }\n }\n\n // Calculate how much the timeline position is changing\n const deltaTime = newStartTime - i.startTime;\n const newDuration = i.duration - deltaTime;\n\n // Update media start time (trimming from source media)\n const curre***********tTime = i.mediaStartTime || 0;\n const newMediaStartTime = curre***********tTime + deltaTime;\n\n // Check if we're trying to extend beyond the start of source media\n if (newMediaStartTime < 0) {\n // Can only extend left by curre***********tTime amount\n const maxExtension = currentMediaStartTime;\n const finalStartTime = i.startTime - maxExtension;\n const finalDuration = i.duration + maxExtension;\n\n // Ensure we don't exceed maxDuration\n if (i.maxDuration && finalDuration > i.maxDuration) {\n return {\n ...i,\n startTime: finalStartTime + (finalDuration - i.maxDuration),\n duration: i.maxDuration,\n mediaStartTime: 0\n };\n }\n\n return {\n ...i,\n startTime: finalStartTime,\n duration: finalDuration,\n mediaStartTime: 0\n };\n }\n\n // Ensure media end doesn't exceed maxDuration\n if (i.maxDuration && newMediaStartTime + newDuration > i.maxDuration) {\n const maxAllowedDuration = i.maxDuration - newMediaStartTime;\n return {\n ...i,\n startTime: i.startTime + (i.duration - maxAllowedDuration),\n duration: maxAllowedDuration,\n mediaStartTime: newMediaStartTime\n };\n }\n\n return {\n ...i,\n startTime: newStartTime,\n duration: newDuration,\n mediaStartTime: newMediaStartTime\n };\n } else {\n // Fix for issue #87: Apply snapping to right edge (end time)\n let newEndTime = Math.max(\n bounds.minTime,\n Math.min(timeAtCursor, bounds.maxTime)\n );\n\n // Apply snapping if within snap distance\n let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n for (const target of snapTargets) {\n const distance = Math.abs(newEndTime - target);\n if (distance < minDistance) {\n minDistance = distance;\n // Only snap if within bounds\n if (target >= bounds.minTime && target <= bounds.maxTime) {\n newEndTime = target;\n }\n }\n }\n\n const newDuration = newEndTime - i.startTime;\n\n // Limit duration by maxDuration if specified\n const limitedDuration = i.maxDuration\n ? Math.min(newDuration, i.maxDuration)\n : newDuration;\n\n return { ...i, duration: limitedDuration };\n }\n }\n return i;\n })\n };\n }\n return t;\n });\n\n return { ...s, tracks: updatedTracks };\n });\n }\n\n onPointerUp(event: MouseEvent | TouchEvent): void {\n // Detect if this was a click/tap (not a drag) on a media item\n if (this.draggedItem && this.mouseDownPosition) {\n const coords = this.getEventCoordinates(event);\n const dx = coords.clientX - this.mouseDownPosition.x;\n const dy = coords.clientY - this.mouseDownPosition.y;\n const distance = Math.sqrt(dx * dx + dy * dy);\n\n // If pointer moved less than 5 pixels, consider it a click/tap\n if (distance < 5) {\n this.selectMediaItem(this.draggedItem.id);\n }\n }\n\n this.draggedItem = null;\n this.draggedItemOriginalTrackId = null;\n this.dragOffsetTime = 0;\n this.isDraggingPlayhead = false;\n this.isDraggingFromRuler = false;\n this.resizingItem = null;\n this.mouseDownPosition = null;\n }\n\n onDocumentPointerMove(event: MouseEvent | TouchEvent): void {\n if (this.isDraggingPlayhead || this.isDraggingFromRuler) {\n // Fix for issue #50: Use ViewChild reference to ensure we use the exact same element as onRulerPointerDown\n if (!this.timelineRuler) {\n return;\n }\n\n const coords = this.getEventCoordinates(event);\n const rulerElement = this.timelineRuler.nativeElement;\n // Use the same calculation as onRulerPointerDown\n // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n const rect = rulerElement.getBoundingClientRect();\n const x = coords.clientX - rect.left;\n const newPosition = x / this.pixelsPerMillisecond();\n const currentState = this.state();\n const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n\n this.state.update(s => ({\n ...s,\n playheadPosition: clampedPosition\n }));\n\n // Sync position to playback service for seeking (but don't call too frequently during drag)\n this.playbackService.seek(currentState.tracks, clampedPosition);\n }\n\n // Fix for issue #96: Handle media item dragging and resizing at document level for touch events\n // This allows dragging between tracks on mobile devices\n if (event instanceof TouchEvent) {\n if (this.draggedItem) {\n // Find which track the touch is currently over\n const targetTrack = this.findTrackAtCoordinates(this.getEventCoordinates(event));\n if (targetTrack) {\n // Reuse existing drag logic\n this.onTrackPointerMove(event, targetTrack);\n }\n } else if (this.resizingItem) {\n // Find the track that contains the resizing item\n const targetTrack = this.findTrackContainingItem(this.resizingItem.item.id);\n if (targetTrack) {\n // Reuse existing resize logic\n this.handleResize(event, targetTrack);\n }\n }\n }\n }\n\n // Helper method to find which track is at the given Y coordinate\n private findTrackAtCoordinates(coords: { clientX: number; clientY: number }): Track | null {\n const trackElements = document.querySelectorAll('.track');\n for (const trackElement of Array.from(trackElements)) {\n const rect = trackElement.getBoundingClientRect();\n if (coords.clientY >= rect.top && coords.clientY <= rect.bottom) {\n const trackIndex = Array.from(trackElements).indexOf(trackElement);\n const tracks = this.state().tracks;\n if (trackIndex >= 0 && trackIndex < tracks.length) {\n return tracks[trackIndex];\n }\n }\n }\n return null;\n }\n\n // Helper method to find the track containing a specific item\n private findTrackContainingItem(itemId: string): Track | null {\n const currentState = this.state();\n for (const track of currentState.tracks) {\n if (track.items.some(item => item.id === itemId)) {\n return track;\n }\n }\n return null;\n }\n\n // Helper methods\n getItemStyle(item: MediaItem) {\n return {\n left: `${item.startTime * this.pixelsPerMillisecond()}px`,\n width: `${item.duration * this.pixelsPerMillisecond()}px`\n };\n }\n\n getMediaTypeClass(type: MediaType): string {\n return `media-${type}`;\n }\n\n formatTime(milliseconds: number): string {\n const seconds = Math.floor(milliseconds / 1000);\n const minutes = Math.floor(seconds / 60);\n const remainingSeconds = seconds % 60;\n const cs = Math.floor((milliseconds % 1000) / 10);\n return `${minutes}:${remainingSeconds.toString().padStart(2, '0')}.${cs.toString().padStart(2, '0')}`;\n }\n\n /**\n * Calculate appropriate time interval for markers based on zoom level\n * to prevent marker labels from overlapping\n */\n private getMarkerInterval(): number {\n // Minimum spacing between markers in pixels to prevent overlap\n // Enough space for \"0:00.000\" text (about 50-60px)\n const MIN_M***********NG_PX = 60;\n\n // Calculate how much time represents MIN_M***********NG_PX at current zoom\n const pixelsPerMs = this.pixelsPerMillisecond();\n const minTimeSpacing = MIN_M***********NG_PX / pixelsPerMs;\n\n // Define possible intervals (in ms): 100ms, 250ms, 500ms, 1s, 2s, 5s, 10s, 30s, 60s\n const intervals = [100, 250, 500, 1000, 2000, 5000, 10000, 30000, 60000];\n\n // Find the smallest interval that's larger than or equal to minTimeSpacing\n for (const interval of intervals) {\n if (interval >= minTimeSpacing) {\n return interval;\n }\n }\n\n // If even 60s is too small, use larger intervals\n return Math.ceil(minTimeSpacing / 60000) * 60000;\n }\n\n getTimeMarkers(): { position: number; label: string }[] {\n const markers: { position: number; label: string }[] = [];\n const stepMs = this.getMarkerInterval(); // Dynamic interval based on zoom level\n\n // Fix for issue #85: Do not show the last time mark at totalDuration\n // to prevent container expansion from the text label\n for (let time = 0; time < this.state().totalDuration; time += stepMs) {\n markers.push({\n position: time * this.pixelsPerMillisecond(),\n label: this.formatTime(time)\n });\n }\n\n return markers;\n }\n\n // Add placeholder media item\n addMediaItem(type: MediaType, trackId: string): void {\n const currentState = this.state();\n const track = currentState.tracks.find(t => t.id === trackId);\n\n if (!track) return;\n\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n const newItemDuration = type === MediaType.IMAGE ? 5000 : 3000;\n\n // Determine the start time for the new item using the service\n const startTime = this.dragDropService.calculateNewItemStartTime(\n playheadTime,\n track.items,\n this.SNAP_PROXIMITY_MS\n );\n\n // Fix for issue #48: Ensure new item doesn't exceed totalDuration\n const maxAllowedDuration = totalDuration - startTime;\n const finalDuration = Math.min(newItemDuration, maxAllowedDuration);\n\n // Fix for issue #64: Verify that the new item doesn't overlap with any existing items\n const testItem: MediaItem = {\n id: 'temp',\n type,\n startTime,\n duration: finalDuration,\n trackId,\n name: '',\n isPlaceholder: true\n };\n\n // Validate and adjust position if needed\n const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n\n // Recalculate duration limit if position was adjusted\n const adjus****************ation = totalDuration - validatedStartTime;\n const adjustedDuration = Math.min(newItemDuration, adjustedMaxAllowedDuration);\n\n // Create the final non-overlapping item\n const newItem: MediaItem = {\n id: `item-${Date.now()}`,\n type,\n startTime: validatedStartTime,\n duration: adjustedDuration,\n trackId,\n name: `${type} placeholder`,\n isPlaceholder: true\n };\n\n // Set maxDuration for audio and video placeholders\n if (type === MediaType.VIDEO) {\n newItem.maxDuration = Math.min(10000, adjustedMaxAllowedDuration); // 10 seconds default for video\n } else if (type === MediaType.AUDIO) {\n newItem.maxDuration = Math.min(15000, adjustedMaxAllowedDuration); // 15 seconds default for audio\n }\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === trackId\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n // Show notification for adding media\n this.notificationsComponent?.showNotification(\n 'Media added to timeline.',\n 'success'\n );\n }\n\n removeMediaItem(itemId: string, trackId: string): void {\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === trackId\n ? { ...t, items: t.items.filter(i => i.id !== itemId) }\n : t\n ),\n // Deselect if removing selected item\n selectedItemId: s.selectedItemId === itemId ? null : s.selectedItemId\n }));\n\n // Show notification for removing media\n this.notificationsComponent?.showNotification(\n 'Media removed from timeline.',\n 'info'\n );\n }\n\n // Media selection\n selectMediaItem(itemId: string): void {\n this.state.update(s => ({\n ...s,\n selectedItemId: itemId\n }));\n }\n\n deselectMediaItem(): void {\n this.state.update(s => ({\n ...s,\n selectedItemId: null\n }));\n }\n\n isItemSelected(itemId: string): boolean {\n return this.state().selectedItemId === itemId;\n }\n\n readonly MediaType = MediaType;\n\n /**\n * Create a new project by clearing the timeline and LocalStorage\n */\n newProject(): void {\n // Stop playback if playing\n if (this.playbackService.isPlaying()) {\n this.playbackService.stop();\n this.isPlaying.set(false);\n }\n\n // Reset timeline state to initial values\n this.state.set({\n tracks: [\n { id: '1', name: 'Track 1', order: 0, items: [] },\n { id: '2', name: 'Track 2', order: 1, items: [] }\n ],\n playheadPosition: 0,\n zoomLevel: 50,\n totalDuration: 120000,\n selectedItemId: null\n });\n\n // Clear LocalStorage\n this.storageService.clearState();\n\n // Show notification\n this.notificationsComponent?.showNotification(\n 'New project created. Timeline cleared.',\n 'success'\n );\n }\n\n // Video preview controls\n togglePlayback(): void {\n const currentState = this.state();\n\n if (this.playbackService.isPlaying()) {\n this.playbackService.pause();\n this.isPlaying.set(false);\n } else {\n // Sync playhead position to PlaybackService before starting\n this.playbackService.setPlayheadPosition(currentState.playheadPosition);\n this.playbackService.play(currentState.tracks, currentState.totalDuration);\n this.isPlaying.set(true);\n }\n }\n\n skipBackward(): void {\n const currentState = this.state();\n const newPosition = Math.max(0, currentState.playheadPosition - 5000);\n\n this.state.update(s => ({\n ...s,\n playheadPosition: newPosition\n }));\n\n // Sync position and update media\n this.playbackService.seek(currentState.tracks, newPosition);\n }\n\n skipForward(): void {\n const currentState = this.state();\n const newPosition = Math.min(currentState.totalDuration, currentState.playheadPosition + 5000);\n\n this.state.update(s => ({\n ...s,\n playheadPosition: newPosition\n }));\n\n // Sync position and update media\n this.playbackService.seek(currentState.tracks, newPosition);\n }\n\n // Duration editor methods\n openDurationEditor(): void {\n this.editedDuration = this.state().totalDuration / 1000;\n this.showDurationEditor.set(true);\n }\n\n closeDurationEditor(): void {\n this.showDurationEditor.set(false);\n }\n\n onDurationInputChange(event: Event): void {\n const input = event.target as HTMLInputElement;\n const value = parseFloat(input.value);\n if (!isNaN(value) && value > 0) {\n this.editedDuration = value;\n }\n }\n\n saveDuration(): void {\n const newDurationMs = Math.max(1000, this.editedDuration * 1000); // At least 1 second\n this.state.update(s => ({\n ...s,\n totalDuration: newDurationMs,\n // Ensure playhead doesn't exceed new duration\n playheadPosition: Math.min(s.playheadPosition, newDurationMs)\n }));\n this.closeDurationEditor();\n }\n\n // Media library methods\n openMediaLibrary(trackId: string): void {\n this.mediaLibraryTargetTrackId = trackId;\n this.showMediaLibrary.set(true);\n }\n\n closeMediaLibrary(): void {\n this.showMediaLibrary.set(false);\n this.mediaLibraryTargetTrackId = null;\n }\n\n onMediaSelected(media: MediaLibraryItem): void {\n if (!this.mediaLibraryTargetTrackId) return;\n\n const currentState = this.state();\n const track = currentState.tracks.find(t => t.id === this.mediaLibraryTargetTrackId);\n\n if (!track) return;\n\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n\n // Determine the start time for the new item using the service\n const startTime = this.dragDropService.calculateNewItemStartTime(\n playheadTime,\n track.items,\n this.SNAP_PROXIMITY_MS\n );\n\n // Ensure item doesn't exceed totalDuration\n const maxAllowedDuration = totalDuration - startTime;\n const finalDuration = Math.min(media.duration, maxAllowedDuration);\n\n // Verify that the new item doesn't overlap with any existing items\n const testItem: MediaItem = {\n id: 'temp',\n type: media.type,\n startTime,\n duration: finalDuration,\n trackId: this.mediaLibraryTargetTrackId,\n name: '',\n isPlaceholder: false\n };\n\n // Validate and adjust position if needed\n const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n\n // Recalculate duration limit if position was adjusted\n const adjus****************ation = totalDuration - validatedStartTime;\n const adjustedDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n\n // Create the final non-overlapping item\n const newItem: MediaItem = {\n id: `item-${Date.now()}`,\n type: media.type,\n startTime: validatedStartTime,\n duration: adjustedDuration,\n trackId: this.mediaLibraryTargetTrackId,\n name: media.name,\n url: media.url, // Pass URL from media library for playback\n isPlaceholder: false\n };\n\n // Set maxDuration for audio and video\n if (media.type === MediaType.VIDEO) {\n newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n } else if (media.type === MediaType.AUDIO) {\n newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n }\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === this.mediaLibraryTargetTrackId\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n // Show notification for adding media\n this.notificationsComponent?.showNotification(\n `\"${media.name}\" added to timeline.`,\n 'success'\n );\n\n // Close the media library after selection\n this.closeMediaLibrary();\n }\n\n /**\n * Trim (split) the selected media item at the playhead position.\n * Creates two separate items from the original media.\n */\n trimSelectedMedia(): void {\n const currentState = this.state();\n const selectedItemId = currentState.selectedItemId;\n\n if (!selectedItemId) {\n return;\n }\n\n // Find the selected item and its track\n let selectedItem: MediaItem | null = null;\n let selectedTrack: Track | null = null;\n\n for (const track of currentState.tracks) {\n const item = track.items.find(i => i.id === selectedItemId);\n if (item) {\n selectedItem = item;\n selectedTrack = track;\n break;\n }\n }\n\n if (!selectedItem || !selectedTrack) {\n return;\n }\n\n const playheadTime = currentState.playheadPosition;\n const itemStart = selectedItem.startTime;\n const itemEnd = itemStart + selectedItem.duration;\n\n // Check if playhead is within the selected media item\n if (playheadTime <= itemStart || playheadTime >= itemEnd) {\n // Playhead is not within the selected media - show notification\n this.notificationsComponent?.showNotification(\n 'Position the playhead within the selected media to trim it.',\n 'warning'\n );\n return;\n }\n\n // Ensure both parts will have at least MIN_ITEM_DURATION\n const firstPartDuration = playheadTime - itemStart;\n const secondPartDuration = itemEnd - playheadTime;\n\n if (firstPartDuration < this.MIN_ITEM_DURATION || secondPartDuration < this.MIN_ITEM_DURATION) {\n this.notificationsComponent?.showNotification(\n 'Cannot trim: resulting parts would be too short.',\n 'warning'\n );\n return;\n }\n\n // Calculate mediaStartTime adjustments\n const origi************tTime = selectedItem.mediaStartTime || 0;\n const secon**************tTime = origi************tTime + firstPartDuration;\n\n // Create two new items from the original\n const firstPart: MediaItem = {\n ...selectedItem,\n id: `item-${Date.now()}-1`,\n duration: firstPartDuration\n // mediaStartTime stays the same for first part\n };\n\n const secondPart: MediaItem = {\n ...selectedItem,\n id: `item-${Date.now()}-2`,\n startTime: playheadTime,\n duration: secondPartDuration,\n mediaStartTime: secondPartMediaStartTime\n };\n\n // Update the state: remove original, add two new parts\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t => {\n if (t.id === selectedTrack!.id) {\n return {\n ...t,\n items: [\n ...t.items.filter(i => i.id !== selectedItemId),\n firstPart,\n secondPart\n ]\n };\n }\n return t;\n }),\n // Deselect after trimming\n selectedItemId: null\n }));\n\n this.notificationsComponent?.showNotification(\n 'Media trimmed successfully.',\n 'success'\n );\n }\n\n /**\n * Copy the selected media item to the clipboard.\n * Stores a copy of the item and the track it was copied from.\n */\n copySelectedMedia(): void {\n const currentState = this.state();\n const selectedItemId = currentState.selectedItemId;\n\n if (!selectedItemId) {\n return;\n }\n\n // Find the selected item and its track\n let selectedItem: MediaItem | null = null;\n let selectedTrackId: string | null = null;\n\n for (const track of currentState.tracks) {\n const item = track.items.find(i => i.id === selectedItemId);\n if (item) {\n selectedItem = item;\n selectedTrackId = track.id;\n break;\n }\n }\n\n if (!selectedItem || !selectedTrackId) {\n return;\n }\n\n // Store a copy of the item in clipboard\n this.clipboardItem.set({ ...selectedItem });\n this.clipboardSourceTrackId.set(selectedTrackId);\n\n this.notificationsComponent?.showNotification(\n 'Media copied to clipboard.',\n 'success'\n );\n }\n\n /**\n * Paste the clipboard media item at the playhead position.\n * Pastes on the same track where the item was copied from.\n * If there's no space at playhead position, finds the next available slot.\n */\n pasteMedia(): void {\n const copiedItem = this.clipboardItem();\n const sourceTrackId = this.clipboardSourceTrackId();\n\n if (!copiedItem || !sourceTrackId) {\n return;\n }\n\n const currentState = this.state();\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n\n // Find the source track\n let targetTrack = currentState.tracks.find(t => t.id === sourceTrackId);\n\n // If source track no longer exists, use the first track\n if (!targetTrack) {\n targetTrack = currentState.tracks[0];\n if (!targetTrack) {\n this.notificationsComponent?.showNotification(\n 'No tracks available to paste media.',\n 'error'\n );\n return;\n }\n }\n\n const itemDuration = copiedItem.duration;\n\n // Try to find a valid position starting from playhead\n const pastePosition = this.findPastePosition(\n playheadTime,\n itemDuration,\n targetTrack.items,\n totalDuration\n );\n\n if (pastePosition === null) {\n this.notificationsComponent?.showNotification(\n 'No space available to paste media on this track.',\n 'warning'\n );\n return;\n }\n\n // Create a new item with a new ID\n const newItem: MediaItem = {\n ...copiedItem,\n id: `item-${Date.now()}`,\n startTime: pastePosition,\n trackId: targetTrack.id\n };\n\n // Add the new item to the track\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === targetTrack!.id\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n this.notificationsComponent?.showNotification(\n 'Media pasted successfully.',\n 'success'\n );\n }\n\n /**\n * Find a valid position to paste media item.\n * First tries at the playhead position, then finds the next available gap.\n */\n private findPastePosition(\n preferredPosition: number,\n duration: number,\n existingItems: MediaItem[],\n totalDuration: number\n ): number | null {\n // Check if we can fit at the preferred position (playhead)\n if (this.canFitAtPosition(preferredPosition, duration, existingItems, totalDuration)) {\n return preferredPosition;\n }\n\n // Sort existing items by start time\n const sortedItems = [...existingItems].sort((a, b) => a.startTime - b.startTime);\n\n // Find all gaps on the track and try to place the item\n const gaps = this.dragDropService.findAllGaps(sortedItems);\n\n // First, try to find a gap that starts at or after the playhead\n for (const gap of gaps) {\n // Calculate actual gap size (considering totalDuration for infinite gaps)\n const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n const gapSize = effectiveGapEnd - gap.gapStart;\n\n if (gap.gapStart >= preferredPosition && gapSize >= duration) {\n return gap.gapStart;\n }\n }\n\n // If no gap after playhead, try any gap that can fit the item\n for (const gap of gaps) {\n // Calculate actual gap size (considering totalDuration for infinite gaps)\n const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n const gapSize = effectiveGapEnd - gap.gapStart;\n\n if (gapSize >= duration) {\n return gap.gapStart;\n }\n }\n\n // No suitable position found\n return null;\n }\n\n /**\n * Check if an item can fit at a specific position without overlapping.\n */\n private canFitAtPosition(\n position: number,\n duration: number,\n existingItems: MediaItem[],\n totalDuration: number\n ): boolean {\n // Check bounds\n if (position < 0 || position + duration > totalDuration) {\n return false;\n }\n\n // Check for overlaps with existing items\n const endPosition = position + duration;\n for (const item of existingItems) {\n const itemEnd = item.startTime + item.duration;\n // Check if there's an overlap\n if (position < itemEnd && endPosition > item.startTime) {\n return false;\n }\n }\n\n return true;\n }\n}\n",
"structuredPatch": [
{
"oldStart": 121,
"oldLines": 7,
"newStart": 121,
"newLines": 8,
"lines": [
" constructor(",
" private dragDropService: TimelineDragDropService,",
" public playbackService: PlaybackService,",
"- private storageService: TimelineStorageService",
"+ private storageService: TimelineStorageService,",
"+ private historyService: TimelineHistoryService",
" ) {",
" // Load saved state from LocalStorage on initialization",
" const savedState = this.storageService.loadState();"
]
}
],
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[2025-12-22T21:47:51.179Z] [INFO] {
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"content": [
{
"type": "text",
"text": "Now let me add the computed properties for undo/redo availability and the undo/redo methods. I'll add them after the `hasClipboardItem` computed property:"
}
],
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[2025-12-22T21:47:54.547Z] [INFO] {
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"model": "claude-opus-4-5-20251101",
"id": "msg_017T2MweRJf6YmPKu9KsyLnE",
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{
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"id": "toolu_01YWyKH1RVm9njM6pqxgpCwc",
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"file_path": "/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts",
"old_string": " // Computed: whether a media item is in clipboard\n readonly hasClipboardItem = computed(() => {\n return this.clipboardItem() !== null;\n });\n\n // Render loop ID for cleanup",
"new_string": " // Computed: whether a media item is in clipboard\n readonly hasClipboardItem = computed(() => {\n return this.clipboardItem() !== null;\n });\n\n // Computed: whether undo/redo is available\n readonly canUndo = computed(() => this.historyService.canUndo());\n readonly canRedo = computed(() => this.historyService.canRedo());\n\n // Render loop ID for cleanup"
}
}
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[2025-12-22T21:47:54.639Z] [INFO] {
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{
"tool_use_id": "toolu_01YWyKH1RVm9njM6pqxgpCwc",
"type": "tool_result",
"content": "The file /tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts has been updated. Here's the result of running `cat -n` on a snippet of the edited file:\n 109→ // Clipboard state for copy/paste functionality\n 110→ private readonly clipboardItem = signal<MediaItem | null>(null);\n 111→ private readonly clipb************ackId = signal<string | null>(null);\n 112→\n 113→ // Computed: whether a media item is in clipboard\n 114→ readonly hasClipboardItem = computed(() => {\n 115→ return this.clipboardItem() !== null;\n 116→ });\n 117→\n 118→ // Computed: whether undo/redo is available\n 119→ readonly canUndo = computed(() => this.historyService.canUndo());\n 120→ readonly canRedo = computed(() => this.historyService.canRedo());\n 121→\n 122→ // Render loop ID for cleanup\n 123→ private renderLoopId: number | null = null;\n 124→\n 125→ constructor(\n 126→ private dragDropService: TimelineDragDropService,"
}
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"filePath": "/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts",
"oldString": " // Computed: whether a media item is in clipboard\n readonly hasClipboardItem = computed(() => {\n return this.clipboardItem() !== null;\n });\n\n // Render loop ID for cleanup",
"newString": " // Computed: whether a media item is in clipboard\n readonly hasClipboardItem = computed(() => {\n return this.clipboardItem() !== null;\n });\n\n // Computed: whether undo/redo is available\n readonly canUndo = computed(() => this.historyService.canUndo());\n readonly canRedo = computed(() => this.historyService.canRedo());\n\n // Render loop ID for cleanup",
"originalFile": "import { Component, signal, computed, ViewChild, ElementRef, AfterViewInit, OnDestroy, effect, HostListener } from '@angular/core';\nimport { CommonModule } from '@angular/common';\nimport { MediaType, MediaItem, Track, TimelineState } from '../../models/timeline.models';\nimport { MediaLibraryComponent, MediaLibraryItem } from '../media-library/media-library.component';\nimport { Media***********onent } from '../media-toolbar/media-toolbar.component';\nimport { Notif************onent } from '../notifications/notifications.component';\nimport { Timel*************rvice } from '../../services/timeline-drag-drop.service';\nimport { PlaybackService } from '../../services/playback.service';\nimport { Timel************rvice } from '../../services/timeline-storage.service';\nimport { Timel************rvice } from '../../services/timeline-history.service';\n\n@Component({\n selector: 'app-timeline',\n standalone: true,\n imports: [CommonModule, MediaLibraryComponent, MediaToolbarComponent, NotificationsComponent],\n templateUrl: './timeline.component.html',\n styleUrl: './timeline.component.css'\n})\nexport class TimelineComponent implements AfterViewInit, OnDestroy {\n // Zoom levels: pixels per second\n private readonly MIN_ZOOM = 10;\n private readonly MAX_ZOOM = 200;\n private readonly ZOOM_STEP = 20;\n readonly TRACK_HEADER_WIDTH = 150; // Width of track header in pixels\n private readonly SNAP_PROXIMITY_MS = 500; // Snap to item if playhead is within 500ms\n private readonly MIN_ITEM_DURATION = 100; // Minimum item duration in milliseconds\n\n // Canvas dimensions for preview\n readonly PREVIEW_WIDTH = 640;\n readonly PREVIEW_HEIGHT = 360;\n\n // View references\n @ViewChild('timelineRuler') timelineRuler?: ElementRef<HTMLElement>;\n @ViewChild('notifications') notificationsComponent?: NotificationsComponent;\n @ViewChild('previewCanvas') previewCanvas?: ElementRef<HTMLCanvasElement>;\n\n // Timeline state\n readonly state = signal<TimelineState>({\n tracks: [\n { id: '1', name: 'Track 1', order: 0, items: [] },\n { id: '2', name: 'Track 2', order: 1, items: [] }\n ],\n playheadPosition: 0,\n zoomLevel: 50, // pixels per second\n totalDuration: 120000, // 120 seconds in milliseconds\n selectedItemId: null\n });\n\n // Computed values\n readonly pixel**********econd = computed(() => {\n return this.state().zoomLevel / 1000;\n });\n\n readonly timelineWidth = computed(() => {\n const state = this.state();\n // Calculate the maximum end time across all tracks\n let maxEndTime = state.totalDuration;\n\n for (const track of state.tracks) {\n for (const item of track.items) {\n const itemEndTime = item.startTime + item.duration;\n if (itemEndTime > maxEndTime) {\n maxEndTime = itemEndTime;\n }\n }\n }\n\n return maxEndTime * this.pixelsPerMillisecond();\n });\n\n readonly timelineLineHeight = computed(() => {\n const state = this.state();\n return state.tracks.length * 60 + 32;\n });\n\n readonly playheadPosition = computed(() => {\n return this.state().playheadPosition * this.pixelsPerMillisecond();\n });\n\n readonly playh************ition = computed(() => {\n return this.playheadPosition() + this.TRACK_HEADER_WIDTH;\n });\n\n // Computed: whether a media item is currently selected\n readonly hasSelectedItem = computed(() => {\n return this.state().selectedItemId !== null;\n });\n\n // Dragging state\n private draggedItem: MediaItem | null = null;\n private draggedItemOriginalTrackId: string | null = null;\n private dragOffsetTime: number = 0; // Offset in milliseconds from item start to cursor position\n private isDraggingPlayhead = false;\n private isDraggingFromRuler = false;\n private resizingItem: { item: MediaItem; edge: 'left' | 'right' } | null = null;\n private mouseDownPosition: { x: number; y: number } | null = null; // Track mouse down position for click detection\n\n // Video preview state\n readonly isPlaying = signal<boolean>(false);\n\n // Duration editor state\n readonly showDurationEditor = signal<boolean>(false);\n private editedDuration: number = 120; // Duration in seconds\n\n // Media library state\n readonly showMediaLibrary = signal<boolean>(false);\n private mediaLibraryTargetTrackId: string | null = null;\n\n // Clipboard state for copy/paste functionality\n private readonly clipboardItem = signal<MediaItem | null>(null);\n private readonly clipb************ackId = signal<string | null>(null);\n\n // Computed: whether a media item is in clipboard\n readonly hasClipboardItem = computed(() => {\n return this.clipboardItem() !== null;\n });\n\n // Render loop ID for cleanup\n private renderLoopId: number | null = null;\n\n constructor(\n private dragDropService: TimelineDragDropService,\n public playbackService: PlaybackService,\n private storageService: TimelineStorageService,\n private historyService: TimelineHistoryService\n ) {\n // Load saved state from LocalStorage on initialization\n const savedState = this.storageService.loadState();\n if (savedState) {\n this.state.set(savedState);\n }\n\n // Effect to sync playhead position from PlaybackService during playback\n effect(() => {\n if (this.playbackService.isPlaying()) {\n const position = this.playbackService.playheadPosition();\n this.state.update(s => ({\n ...s,\n playheadPosition: position\n }));\n }\n });\n\n // Effect to auto-save timeline state to LocalStorage on any change\n effect(() => {\n const currentState = this.state();\n this.storageService.saveState(currentState);\n });\n }\n\n ngAfterViewInit(): void {\n // Initialize canvas for preview rendering\n if (this.previewCanvas) {\n this.playbackService.setCanvas(this.previewCanvas.nativeElement);\n }\n\n // Start continuous render loop for preview (renders current frame even when paused)\n this.startRenderLoop();\n\n // Synchronize media and render initial frame if state was loaded from LocalStorage\n const currentState = this.state();\n if (currentState.tracks.length > 0) {\n this.playbackService.seek(currentState.tracks, currentState.playheadPosition);\n }\n }\n\n ngOnDestroy(): void {\n // Clean up render loop\n if (this.renderLoopId !== null) {\n cancelAnimationFrame(this.renderLoopId);\n this.renderLoopId = null;\n }\n\n // Stop playback\n this.playbackService.stop();\n }\n\n /**\n * Continuous render loop for preview canvas.\n * Keeps rendering even when paused so seeking updates the preview.\n */\n private startRenderLoop(): void {\n const render = () => {\n // Only render if we have active media and are not playing\n // (PlaybackService handles rendering during playback)\n if (!this.playbackService.isPlaying()) {\n this.playbackService.renderCurrentFrame();\n }\n this.renderLoopId = requestAnimationFrame(render);\n };\n this.renderLoopId = requestAnimationFrame(render);\n }\n\n // Track management\n addTrack(): void {\n const currentState = this.state();\n const newTrack: Track = {\n id: `track-${Date.now()}`,\n name: `Track ${currentState.tracks.length + 1}`,\n order: currentState.tracks.length,\n items: []\n };\n\n this.state.update(s => ({\n ...s,\n tracks: [...s.tracks, newTrack]\n }));\n\n // Show notification for adding track\n this.notificationsComponent?.showNotification(\n `Track \"${newTrack.name}\" added.`,\n 'success'\n );\n }\n\n removeTrack(trackId: string): void {\n const currentState = this.state();\n if (currentState.tracks.length <= 1) {\n return; // Keep at least one track\n }\n\n // Get track name before removing\n const trackToRemove = currentState.tracks.find(t => t.id === trackId);\n const trackName = trackToRemove?.name || 'Track';\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.filter(t => t.id !== trackId)\n }));\n\n // Show notification for removing track\n this.notificationsComponent?.showNotification(\n `Track \"${trackName}\" removed.`,\n 'info'\n );\n }\n\n // Zoom controls\n zoomIn(): void {\n this.state.update(s => ({\n ...s,\n zoomLevel: Math.min(s.zoomLevel + this.ZOOM_STEP, this.MAX_ZOOM)\n }));\n }\n\n zoomOut(): void {\n this.state.update(s => ({\n ...s,\n zoomLevel: Math.max(s.zoomLevel - this.ZOOM_STEP, this.MIN_ZOOM)\n }));\n }\n\n // Utility method to extract coordinates from mouse or touch events\n private getEventCoordinates(event: MouseEvent | TouchEvent): { clientX: number; clientY: number } {\n if (event instanceof MouseEvent) {\n return { clientX: event.clientX, clientY: event.clientY };\n } else {\n const touch = event.touches[0] || event.changedTouches[0];\n return { clientX: touch.clientX, clientY: touch.clientY };\n }\n }\n\n // Playhead controls\n onRulerPointerDown(event: MouseEvent | TouchEvent): void {\n event.preventDefault();\n this.isDraggingFromRuler = true;\n\n // Immediately update position on pointer down\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n const coords = this.getEventCoordinates(event);\n // Calculate position within the ruler element\n // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n const x = coords.clientX - rect.left;\n const newPosition = x / this.pixelsPerMillisecond();\n const currentState = this.state();\n const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n\n this.state.update(s => ({\n ...s,\n playheadPosition: clampedPosition\n }));\n\n // Sync position to playback service for seeking\n this.playbackService.seek(currentState.tracks, clampedPosition);\n }\n\n onPlayheadPointerDown(event: MouseEvent | TouchEvent): void {\n event.preventDefault();\n event.stopPropagation();\n this.isDraggingPlayhead = true;\n }\n\n\n // Media item drag and drop\n onMediaItemPointerDown(event: MouseEvent | TouchEvent, item: MediaItem, track: Track): void {\n const target = event.target as HTMLElement;\n\n // Check if clicking/touching on resize handle\n if (target.classList.contains('resize-handle')) {\n this.resizingItem = {\n item,\n edge: target.classList.contains('resize-handle-left') ? 'left' : 'right'\n };\n event.preventDefault();\n return;\n }\n\n const coords = this.getEventCoordinates(event);\n this.mouseDownPosition = { x: coords.clientX, y: coords.clientY };\n\n const mediaItemElement = event.currentTarget as HTMLElement;\n const rect = mediaItemElement.getBoundingClientRect();\n const clickX = coords.clientX - rect.left;\n\n // Convert pixel offset to time offset\n this.dragOffsetTime = clickX / this.pixelsPerMillisecond();\n\n this.draggedItem = item;\n this.draggedItemOriginalTrackId = track.id;\n event.preventDefault();\n }\n\n onTrackPointerDown(event: MouseEvent | TouchEvent): void {\n // Deselect when clicking/touching track background (not on media item)\n const target = event.target as HTMLElement;\n if (target.classList.contains('track')) {\n this.deselectMediaItem();\n }\n }\n\n onTrackPointerMove(event: MouseEvent | TouchEvent, track: Track): void {\n if (this.resizingItem) {\n this.handleResize(event, track);\n return;\n }\n event.preventDefault();\n event.stopPropagation();\n\n if (!this.draggedItem) return;\n\n const coords = this.getEventCoordinates(event);\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n const x = coords.clientX - rect.left;\n const requestedStartTime = Math.max(0, x / this.pixelsPerMillisecond() - this.dragOffsetTime);\n\n this.state.update(s => {\n const updatedTracks = s.tracks.map(t => {\n if (t.id === track.id) {\n // Get all items except the dragged one for collision detection\n const otherItems = t.items.filter(i => i.id !== this.draggedItem!.id);\n\n // Fix for issue #81: Find snap targets (playhead and items on all tracks)\n const snapTargets = this.dragDropService.findSnapTargets(\n this.draggedItem!.id,\n s.tracks,\n s.playheadPosition\n );\n\n // Calculate valid position and duration considering collisions, gap fitting, and snapping\n const validPosition = this.dragDropService.getValidDragPosition(\n this.draggedItem!,\n requestedStartTime,\n otherItems,\n s.totalDuration,\n snapTargets\n );\n\n // Check if item already exists in this track\n const itemExists = t.items.some(i => i.id === this.draggedItem!.id);\n\n if (itemExists) {\n // Update position and duration in current track\n return {\n ...t,\n items: t.items.map(i =>\n i.id === this.draggedItem!.id\n ? {\n ...i,\n startTime: validPosition.startTime,\n duration: validPosition.duration,\n trackId: track.id\n }\n : i\n )\n };\n } else {\n // Add to new track with adjusted position and duration\n return {\n ...t,\n items: [\n ...otherItems,\n {\n ...this.draggedItem!,\n startTime: validPosition.startTime,\n duration: validPosition.duration,\n trackId: track.id\n }\n ]\n };\n }\n } else if (t.id === this.draggedItemOriginalTrackId && t.id !== track.id) {\n // Remove from original track only if moving to different track\n return {\n ...t,\n items: t.items.filter(i => i.id !== this.draggedItem!.id)\n };\n }\n return t;\n });\n\n // Update the original track ID to current track for smooth dragging within same track\n this.draggedItemOriginalTrackId = track.id;\n\n return { ...s, tracks: updatedTracks };\n });\n }\n\n private handleResize(event: MouseEvent | TouchEvent, track: Track): void {\n if (!this.resizingItem) return;\n\n const coords = this.getEventCoordinates(event);\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n // Fix for issue #83: getBoundingClientRect() returns viewport-relative coordinates,\n // and coords.clientX is also viewport-relative, so we don't need to add scrollLeft\n const x = coords.clientX - rect.left;\n const timeAtCursor = x / this.pixelsPerMillisecond();\n\n this.state.update(s => {\n // Fix for issue #87: Find snap targets for resize operations\n const snapTargets = this.dragDropService.findSnapTargets(\n this.resizingItem!.item.id,\n s.tracks,\n s.playheadPosition\n );\n\n const updatedTracks = s.tracks.map(t => {\n if (t.id === track.id) {\n // Get resize bounds considering adjacent items\n const bounds = this.dragDropService.getResizeBounds(\n this.resizingItem!.item,\n t.items,\n this.resizingItem!.edge,\n s.totalDuration\n );\n\n return {\n ...t,\n items: t.items.map(i => {\n if (i.id === this.resizingItem!.item.id) {\n if (this.resizingItem!.edge === 'left') {\n // Fix for issue #89: Handle mediaStartTime when resizing from left\n // Apply snapping to left edge (start time)\n let newStartTime = Math.max(\n bounds.minTime,\n Math.min(timeAtCursor, bounds.maxTime)\n );\n\n // Apply snapping if within snap distance\n let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n for (const target of snapTargets) {\n const distance = Math.abs(newStartTime - target);\n if (distance < minDistance) {\n minDistance = distance;\n // Only snap if within bounds\n if (target >= bounds.minTime && target <= bounds.maxTime) {\n newStartTime = target;\n }\n }\n }\n\n // Calculate how much the timeline position is changing\n const deltaTime = newStartTime - i.startTime;\n const newDuration = i.duration - deltaTime;\n\n // Update media start time (trimming from source media)\n const curre***********tTime = i.mediaStartTime || 0;\n const newMediaStartTime = curre***********tTime + deltaTime;\n\n // Check if we're trying to extend beyond the start of source media\n if (newMediaStartTime < 0) {\n // Can only extend left by curre***********tTime amount\n const maxExtension = currentMediaStartTime;\n const finalStartTime = i.startTime - maxExtension;\n const finalDuration = i.duration + maxExtension;\n\n // Ensure we don't exceed maxDuration\n if (i.maxDuration && finalDuration > i.maxDuration) {\n return {\n ...i,\n startTime: finalStartTime + (finalDuration - i.maxDuration),\n duration: i.maxDuration,\n mediaStartTime: 0\n };\n }\n\n return {\n ...i,\n startTime: finalStartTime,\n duration: finalDuration,\n mediaStartTime: 0\n };\n }\n\n // Ensure media end doesn't exceed maxDuration\n if (i.maxDuration && newMediaStartTime + newDuration > i.maxDuration) {\n const maxAllowedDuration = i.maxDuration - newMediaStartTime;\n return {\n ...i,\n startTime: i.startTime + (i.duration - maxAllowedDuration),\n duration: maxAllowedDuration,\n mediaStartTime: newMediaStartTime\n };\n }\n\n return {\n ...i,\n startTime: newStartTime,\n duration: newDuration,\n mediaStartTime: newMediaStartTime\n };\n } else {\n // Fix for issue #87: Apply snapping to right edge (end time)\n let newEndTime = Math.max(\n bounds.minTime,\n Math.min(timeAtCursor, bounds.maxTime)\n );\n\n // Apply snapping if within snap distance\n let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n for (const target of snapTargets) {\n const distance = Math.abs(newEndTime - target);\n if (distance < minDistance) {\n minDistance = distance;\n // Only snap if within bounds\n if (target >= bounds.minTime && target <= bounds.maxTime) {\n newEndTime = target;\n }\n }\n }\n\n const newDuration = newEndTime - i.startTime;\n\n // Limit duration by maxDuration if specified\n const limitedDuration = i.maxDuration\n ? Math.min(newDuration, i.maxDuration)\n : newDuration;\n\n return { ...i, duration: limitedDuration };\n }\n }\n return i;\n })\n };\n }\n return t;\n });\n\n return { ...s, tracks: updatedTracks };\n });\n }\n\n onPointerUp(event: MouseEvent | TouchEvent): void {\n // Detect if this was a click/tap (not a drag) on a media item\n if (this.draggedItem && this.mouseDownPosition) {\n const coords = this.getEventCoordinates(event);\n const dx = coords.clientX - this.mouseDownPosition.x;\n const dy = coords.clientY - this.mouseDownPosition.y;\n const distance = Math.sqrt(dx * dx + dy * dy);\n\n // If pointer moved less than 5 pixels, consider it a click/tap\n if (distance < 5) {\n this.selectMediaItem(this.draggedItem.id);\n }\n }\n\n this.draggedItem = null;\n this.draggedItemOriginalTrackId = null;\n this.dragOffsetTime = 0;\n this.isDraggingPlayhead = false;\n this.isDraggingFromRuler = false;\n this.resizingItem = null;\n this.mouseDownPosition = null;\n }\n\n onDocumentPointerMove(event: MouseEvent | TouchEvent): void {\n if (this.isDraggingPlayhead || this.isDraggingFromRuler) {\n // Fix for issue #50: Use ViewChild reference to ensure we use the exact same element as onRulerPointerDown\n if (!this.timelineRuler) {\n return;\n }\n\n const coords = this.getEventCoordinates(event);\n const rulerElement = this.timelineRuler.nativeElement;\n // Use the same calculation as onRulerPointerDown\n // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n const rect = rulerElement.getBoundingClientRect();\n const x = coords.clientX - rect.left;\n const newPosition = x / this.pixelsPerMillisecond();\n const currentState = this.state();\n const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n\n this.state.update(s => ({\n ...s,\n playheadPosition: clampedPosition\n }));\n\n // Sync position to playback service for seeking (but don't call too frequently during drag)\n this.playbackService.seek(currentState.tracks, clampedPosition);\n }\n\n // Fix for issue #96: Handle media item dragging and resizing at document level for touch events\n // This allows dragging between tracks on mobile devices\n if (event instanceof TouchEvent) {\n if (this.draggedItem) {\n // Find which track the touch is currently over\n const targetTrack = this.findTrackAtCoordinates(this.getEventCoordinates(event));\n if (targetTrack) {\n // Reuse existing drag logic\n this.onTrackPointerMove(event, targetTrack);\n }\n } else if (this.resizingItem) {\n // Find the track that contains the resizing item\n const targetTrack = this.findTrackContainingItem(this.resizingItem.item.id);\n if (targetTrack) {\n // Reuse existing resize logic\n this.handleResize(event, targetTrack);\n }\n }\n }\n }\n\n // Helper method to find which track is at the given Y coordinate\n private findTrackAtCoordinates(coords: { clientX: number; clientY: number }): Track | null {\n const trackElements = document.querySelectorAll('.track');\n for (const trackElement of Array.from(trackElements)) {\n const rect = trackElement.getBoundingClientRect();\n if (coords.clientY >= rect.top && coords.clientY <= rect.bottom) {\n const trackIndex = Array.from(trackElements).indexOf(trackElement);\n const tracks = this.state().tracks;\n if (trackIndex >= 0 && trackIndex < tracks.length) {\n return tracks[trackIndex];\n }\n }\n }\n return null;\n }\n\n // Helper method to find the track containing a specific item\n private findTrackContainingItem(itemId: string): Track | null {\n const currentState = this.state();\n for (const track of currentState.tracks) {\n if (track.items.some(item => item.id === itemId)) {\n return track;\n }\n }\n return null;\n }\n\n // Helper methods\n getItemStyle(item: MediaItem) {\n return {\n left: `${item.startTime * this.pixelsPerMillisecond()}px`,\n width: `${item.duration * this.pixelsPerMillisecond()}px`\n };\n }\n\n getMediaTypeClass(type: MediaType): string {\n return `media-${type}`;\n }\n\n formatTime(milliseconds: number): string {\n const seconds = Math.floor(milliseconds / 1000);\n const minutes = Math.floor(seconds / 60);\n const remainingSeconds = seconds % 60;\n const cs = Math.floor((milliseconds % 1000) / 10);\n return `${minutes}:${remainingSeconds.toString().padStart(2, '0')}.${cs.toString().padStart(2, '0')}`;\n }\n\n /**\n * Calculate appropriate time interval for markers based on zoom level\n * to prevent marker labels from overlapping\n */\n private getMarkerInterval(): number {\n // Minimum spacing between markers in pixels to prevent overlap\n // Enough space for \"0:00.000\" text (about 50-60px)\n const MIN_M***********NG_PX = 60;\n\n // Calculate how much time represents MIN_M***********NG_PX at current zoom\n const pixelsPerMs = this.pixelsPerMillisecond();\n const minTimeSpacing = MIN_M***********NG_PX / pixelsPerMs;\n\n // Define possible intervals (in ms): 100ms, 250ms, 500ms, 1s, 2s, 5s, 10s, 30s, 60s\n const intervals = [100, 250, 500, 1000, 2000, 5000, 10000, 30000, 60000];\n\n // Find the smallest interval that's larger than or equal to minTimeSpacing\n for (const interval of intervals) {\n if (interval >= minTimeSpacing) {\n return interval;\n }\n }\n\n // If even 60s is too small, use larger intervals\n return Math.ceil(minTimeSpacing / 60000) * 60000;\n }\n\n getTimeMarkers(): { position: number; label: string }[] {\n const markers: { position: number; label: string }[] = [];\n const stepMs = this.getMarkerInterval(); // Dynamic interval based on zoom level\n\n // Fix for issue #85: Do not show the last time mark at totalDuration\n // to prevent container expansion from the text label\n for (let time = 0; time < this.state().totalDuration; time += stepMs) {\n markers.push({\n position: time * this.pixelsPerMillisecond(),\n label: this.formatTime(time)\n });\n }\n\n return markers;\n }\n\n // Add placeholder media item\n addMediaItem(type: MediaType, trackId: string): void {\n const currentState = this.state();\n const track = currentState.tracks.find(t => t.id === trackId);\n\n if (!track) return;\n\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n const newItemDuration = type === MediaType.IMAGE ? 5000 : 3000;\n\n // Determine the start time for the new item using the service\n const startTime = this.dragDropService.calculateNewItemStartTime(\n playheadTime,\n track.items,\n this.SNAP_PROXIMITY_MS\n );\n\n // Fix for issue #48: Ensure new item doesn't exceed totalDuration\n const maxAllowedDuration = totalDuration - startTime;\n const finalDuration = Math.min(newItemDuration, maxAllowedDuration);\n\n // Fix for issue #64: Verify that the new item doesn't overlap with any existing items\n const testItem: MediaItem = {\n id: 'temp',\n type,\n startTime,\n duration: finalDuration,\n trackId,\n name: '',\n isPlaceholder: true\n };\n\n // Validate and adjust position if needed\n const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n\n // Recalculate duration limit if position was adjusted\n const adjus****************ation = totalDuration - validatedStartTime;\n const adjustedDuration = Math.min(newItemDuration, adjustedMaxAllowedDuration);\n\n // Create the final non-overlapping item\n const newItem: MediaItem = {\n id: `item-${Date.now()}`,\n type,\n startTime: validatedStartTime,\n duration: adjustedDuration,\n trackId,\n name: `${type} placeholder`,\n isPlaceholder: true\n };\n\n // Set maxDuration for audio and video placeholders\n if (type === MediaType.VIDEO) {\n newItem.maxDuration = Math.min(10000, adjustedMaxAllowedDuration); // 10 seconds default for video\n } else if (type === MediaType.AUDIO) {\n newItem.maxDuration = Math.min(15000, adjustedMaxAllowedDuration); // 15 seconds default for audio\n }\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === trackId\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n // Show notification for adding media\n this.notificationsComponent?.showNotification(\n 'Media added to timeline.',\n 'success'\n );\n }\n\n removeMediaItem(itemId: string, trackId: string): void {\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === trackId\n ? { ...t, items: t.items.filter(i => i.id !== itemId) }\n : t\n ),\n // Deselect if removing selected item\n selectedItemId: s.selectedItemId === itemId ? null : s.selectedItemId\n }));\n\n // Show notification for removing media\n this.notificationsComponent?.showNotification(\n 'Media removed from timeline.',\n 'info'\n );\n }\n\n // Media selection\n selectMediaItem(itemId: string): void {\n this.state.update(s => ({\n ...s,\n selectedItemId: itemId\n }));\n }\n\n deselectMediaItem(): void {\n this.state.update(s => ({\n ...s,\n selectedItemId: null\n }));\n }\n\n isItemSelected(itemId: string): boolean {\n return this.state().selectedItemId === itemId;\n }\n\n readonly MediaType = MediaType;\n\n /**\n * Create a new project by clearing the timeline and LocalStorage\n */\n newProject(): void {\n // Stop playback if playing\n if (this.playbackService.isPlaying()) {\n this.playbackService.stop();\n this.isPlaying.set(false);\n }\n\n // Reset timeline state to initial values\n this.state.set({\n tracks: [\n { id: '1', name: 'Track 1', order: 0, items: [] },\n { id: '2', name: 'Track 2', order: 1, items: [] }\n ],\n playheadPosition: 0,\n zoomLevel: 50,\n totalDuration: 120000,\n selectedItemId: null\n });\n\n // Clear LocalStorage\n this.storageService.clearState();\n\n // Show notification\n this.notificationsComponent?.showNotification(\n 'New project created. 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startTime;\n const finalDuration = Math.min(media.duration, maxAllowedDuration);\n\n // Verify that the new item doesn't overlap with any existing items\n const testItem: MediaItem = {\n id: 'temp',\n type: media.type,\n startTime,\n duration: finalDuration,\n trackId: this.mediaLibraryTargetTrackId,\n name: '',\n isPlaceholder: false\n };\n\n // Validate and adjust position if needed\n const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n\n // Recalculate duration limit if position was adjusted\n const adjus****************ation = totalDuration - validatedStartTime;\n const adjustedDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n\n // Create the final non-overlapping item\n const newItem: MediaItem = {\n id: `item-${Date.now()}`,\n type: media.type,\n startTime: validatedStartTime,\n duration: adjustedDuration,\n trackId: this.mediaLibraryTargetTrackId,\n name: media.name,\n url: media.url, // Pass URL from media library for playback\n isPlaceholder: false\n };\n\n // Set maxDuration for audio and video\n if (media.type === MediaType.VIDEO) {\n newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n } else if (media.type === MediaType.AUDIO) {\n newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n }\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === this.mediaLibraryTargetTrackId\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n // Show notification for adding media\n this.notificationsComponent?.showNotification(\n `\"${media.name}\" added to timeline.`,\n 'success'\n );\n\n // Close the media library after selection\n this.closeMediaLibrary();\n }\n\n /**\n * Trim (split) the selected media item at the playhead position.\n * Creates two separate items from the original media.\n */\n trimSelectedMedia(): void {\n const currentState = this.state();\n const selectedItemId = currentState.selectedItemId;\n\n if (!selectedItemId) {\n return;\n }\n\n // Find the selected item and its track\n let selectedItem: MediaItem | null = null;\n let selectedTrack: Track | null = null;\n\n for (const track of currentState.tracks) {\n const item = track.items.find(i => i.id === selectedItemId);\n if (item) {\n selectedItem = item;\n selectedTrack = track;\n break;\n }\n }\n\n if (!selectedItem || !selectedTrack) {\n return;\n }\n\n const playheadTime = currentState.playheadPosition;\n const itemStart = selectedItem.startTime;\n const itemEnd = itemStart + selectedItem.duration;\n\n // Check if playhead is within the selected media item\n if (playheadTime <= itemStart || playheadTime >= itemEnd) {\n // Playhead is not within the selected media - show notification\n this.notificationsComponent?.showNotification(\n 'Position the playhead within the selected media to trim it.',\n 'warning'\n );\n return;\n }\n\n // Ensure both parts will have at least MIN_ITEM_DURATION\n const firstPartDuration = playheadTime - itemStart;\n const secondPartDuration = itemEnd - playheadTime;\n\n if (firstPartDuration < this.MIN_ITEM_DURATION || secondPartDuration < this.MIN_ITEM_DURATION) {\n this.notificationsComponent?.showNotification(\n 'Cannot trim: resulting parts would be too short.',\n 'warning'\n );\n return;\n }\n\n // Calculate mediaStartTime adjustments\n const origi************tTime = selectedItem.mediaStartTime || 0;\n const secon**************tTime = origi************tTime + firstPartDuration;\n\n // Create two new items from the original\n const firstPart: MediaItem = {\n ...selectedItem,\n id: `item-${Date.now()}-1`,\n duration: firstPartDuration\n // mediaStartTime stays the same for first part\n };\n\n const secondPart: MediaItem = {\n ...selectedItem,\n id: `item-${Date.now()}-2`,\n startTime: playheadTime,\n duration: secondPartDuration,\n mediaStartTime: secondPartMediaStartTime\n };\n\n // Update the state: remove original, add two new parts\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t => {\n if (t.id === selectedTrack!.id) {\n return {\n ...t,\n items: [\n ...t.items.filter(i => i.id !== selectedItemId),\n firstPart,\n secondPart\n ]\n };\n }\n return t;\n }),\n // Deselect after trimming\n selectedItemId: null\n }));\n\n this.notificationsComponent?.showNotification(\n 'Media trimmed successfully.',\n 'success'\n );\n }\n\n /**\n * Copy the selected media item to the clipboard.\n * Stores a copy of the item and the track it was copied from.\n */\n copySelectedMedia(): void {\n const currentState = this.state();\n const selectedItemId = currentState.selectedItemId;\n\n if (!selectedItemId) {\n return;\n }\n\n // Find the selected item and its track\n let selectedItem: MediaItem | null = null;\n let selectedTrackId: string | null = null;\n\n for (const track of currentState.tracks) {\n const item = track.items.find(i => i.id === selectedItemId);\n if (item) {\n selectedItem = item;\n selectedTrackId = track.id;\n break;\n }\n }\n\n if (!selectedItem || !selectedTrackId) {\n return;\n }\n\n // Store a copy of the item in clipboard\n this.clipboardItem.set({ ...selectedItem });\n this.clipboardSourceTrackId.set(selectedTrackId);\n\n this.notificationsComponent?.showNotification(\n 'Media copied to clipboard.',\n 'success'\n );\n }\n\n /**\n * Paste the clipboard media item at the playhead position.\n * Pastes on the same track where the item was copied from.\n * If there's no space at playhead position, finds the next available slot.\n */\n pasteMedia(): void {\n const copiedItem = this.clipboardItem();\n const sourceTrackId = this.clipboardSourceTrackId();\n\n if (!copiedItem || !sourceTrackId) {\n return;\n }\n\n const currentState = this.state();\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n\n // Find the source track\n let targetTrack = currentState.tracks.find(t => t.id === sourceTrackId);\n\n // If source track no longer exists, use the first track\n if (!targetTrack) {\n targetTrack = currentState.tracks[0];\n if (!targetTrack) {\n this.notificationsComponent?.showNotification(\n 'No tracks available to paste media.',\n 'error'\n );\n return;\n }\n }\n\n const itemDuration = copiedItem.duration;\n\n // Try to find a valid position starting from playhead\n const pastePosition = this.findPastePosition(\n playheadTime,\n itemDuration,\n targetTrack.items,\n totalDuration\n );\n\n if (pastePosition === null) {\n this.notificationsComponent?.showNotification(\n 'No space available to paste media on this track.',\n 'warning'\n );\n return;\n }\n\n // Create a new item with a new ID\n const newItem: MediaItem = {\n ...copiedItem,\n id: `item-${Date.now()}`,\n startTime: pastePosition,\n trackId: targetTrack.id\n };\n\n // Add the new item to the track\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === targetTrack!.id\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n this.notificationsComponent?.showNotification(\n 'Media pasted successfully.',\n 'success'\n );\n }\n\n /**\n * Find a valid position to paste media item.\n * First tries at the playhead position, then finds the next available gap.\n */\n private findPastePosition(\n preferredPosition: number,\n duration: number,\n existingItems: MediaItem[],\n totalDuration: number\n ): number | null {\n // Check if we can fit at the preferred position (playhead)\n if (this.canFitAtPosition(preferredPosition, duration, existingItems, totalDuration)) {\n return preferredPosition;\n }\n\n // Sort existing items by start time\n const sortedItems = [...existingItems].sort((a, b) => a.startTime - b.startTime);\n\n // Find all gaps on the track and try to place the item\n const gaps = this.dragDropService.findAllGaps(sortedItems);\n\n // First, try to find a gap that starts at or after the playhead\n for (const gap of gaps) {\n // Calculate actual gap size (considering totalDuration for infinite gaps)\n const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n const gapSize = effectiveGapEnd - gap.gapStart;\n\n if (gap.gapStart >= preferredPosition && gapSize >= duration) {\n return gap.gapStart;\n }\n }\n\n // If no gap after playhead, try any gap that can fit the item\n for (const gap of gaps) {\n // Calculate actual gap size (considering totalDuration for infinite gaps)\n const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n const gapSize = effectiveGapEnd - gap.gapStart;\n\n if (gapSize >= duration) {\n return gap.gapStart;\n }\n }\n\n // No suitable position found\n return null;\n }\n\n /**\n * Check if an item can fit at a specific position without overlapping.\n */\n private canFitAtPosition(\n position: number,\n duration: number,\n existingItems: MediaItem[],\n totalDuration: number\n ): boolean {\n // Check bounds\n if (position < 0 || position + duration > totalDuration) {\n return false;\n }\n\n // Check for overlaps with existing items\n const endPosition = position + duration;\n for (const item of existingItems) {\n const itemEnd = item.startTime + item.duration;\n // Check if there's an overlap\n if (position < itemEnd && endPosition > item.startTime) {\n return false;\n }\n }\n\n return true;\n }\n}\n",
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"+ // Computed: whether undo/redo is available",
"+ readonly canUndo = computed(() => this.historyService.canUndo());",
"+ readonly canRedo = computed(() => this.historyService.canRedo());",
"+",
" // Render loop ID for cleanup",
" private renderLoopId: number | null = null;",
" "
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"text": "Now I need to add a helper method to save state before changes and the undo/redo methods. I'll add them after the `newProject` method. Let me first look at that method:"
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"content": " 838→ return this.state().selectedItemId === itemId;\n 839→ }\n 840→\n 841→ readonly MediaType = MediaType;\n 842→\n 843→ /**\n 844→ * Create a new project by clearing the timeline and LocalStorage\n 845→ */\n 846→ newProject(): void {\n 847→ // Stop playback if playing\n 848→ if (this.playbackService.isPlaying()) {\n 849→ this.playbackService.stop();\n 850→ this.isPlaying.set(false);\n 851→ }\n 852→\n 853→ // Reset timeline state to initial values\n 854→ this.state.set({\n 855→ tracks: [\n 856→ { id: '1', name: 'Track 1', order: 0, items: [] },\n 857→ { id: '2', name: 'Track 2', order: 1, items: [] }\n 858→ ],\n 859→ playheadPosition: 0,\n 860→ zoomLevel: 50,\n 861→ totalDuration: 120000,\n 862→ selectedItemId: null\n 863→ });\n 864→\n 865→ // Clear LocalStorage\n 866→ this.storageService.clearState();\n 867→\n 868→ // Show notification\n 869→ this.notificationsComponent?.showNotification(\n 870→ 'New project created. Timeline cleared.',\n 871→ 'success'\n 872→ );\n 873→ }\n 874→\n 875→ // Video preview controls\n 876→ togglePlayback(): void {\n 877→ const currentState = this.state();\n 878→\n 879→ if (this.playbackService.isPlaying()) {\n 880→ this.playbackService.pause();\n 881→ this.isPlaying.set(false);\n 882→ } else {\n 883→ // Sync playhead position to PlaybackService before starting\n 884→ this.playbackService.setPlayheadPosition(currentState.playheadPosition);\n 885→ this.playbackService.play(currentState.tracks, currentState.totalDuration);\n 886→ this.isPlaying.set(true);\n 887→ }\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"
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"content": " return this.state().selectedItemId === itemId;\n }\n\n readonly MediaType = MediaType;\n\n /**\n * Create a new project by clearing the timeline and LocalStorage\n */\n newProject(): void {\n // Stop playback if playing\n if (this.playbackService.isPlaying()) {\n this.playbackService.stop();\n this.isPlaying.set(false);\n }\n\n // Reset timeline state to initial values\n this.state.set({\n tracks: [\n { id: '1', name: 'Track 1', order: 0, items: [] },\n { id: '2', name: 'Track 2', order: 1, items: [] }\n ],\n playheadPosition: 0,\n zoomLevel: 50,\n totalDuration: 120000,\n selectedItemId: null\n });\n\n // Clear LocalStorage\n this.storageService.clearState();\n\n // Show notification\n this.notificationsComponent?.showNotification(\n 'New project created. Timeline cleared.',\n 'success'\n );\n }\n\n // Video preview controls\n togglePlayback(): void {\n const currentState = this.state();\n\n if (this.playbackService.isPlaying()) {\n this.playbackService.pause();\n this.isPlaying.set(false);\n } else {\n // Sync playhead position to PlaybackService before starting\n this.playbackService.setPlayheadPosition(currentState.playheadPosition);\n this.playbackService.play(currentState.tracks, currentState.totalDuration);\n this.isPlaying.set(true);\n }",
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"text": "Now I'll add the undo/redo methods and the helper method right after the `newProject` method:"
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"old_string": " // Show notification\n this.notificationsComponent?.showNotification(\n 'New project created. Timeline cleared.',\n 'success'\n );\n }\n\n // Video preview controls",
"new_string": " // Show notification\n this.notificationsComponent?.showNotification(\n 'New project created. Timeline cleared.',\n 'success'\n );\n\n // Clear undo/redo history when creating a new project\n this.historyService.clearHistory();\n }\n\n /**\n * Push current state to history before making a change.\n * Should be called at the start of any operation that modifies the timeline.\n */\n private saveStateToHistory(): void {\n this.historyService.pushState(this.state());\n }\n\n /**\n * Undo the last action.\n * Restores the previous timeline state.\n */\n undo(): void {\n const previousState = this.historyService.undo(this.state());\n if (previousState) {\n this.state.set(previousState);\n\n // Sync playback service with new state\n this.playbackService.seek(previousState.tracks, previousState.playheadPosition);\n\n this.notificationsComponent?.showNotification('Undo successful.', 'info');\n }\n }\n\n /**\n * Redo the last undone action.\n * Restores the next timeline state.\n */\n redo(): void {\n const nextState = this.historyService.redo(this.state());\n if (nextState) {\n this.state.set(nextState);\n\n // Sync playback service with new state\n this.playbackService.seek(nextState.tracks, nextState.playheadPosition);\n\n this.notificationsComponent?.showNotification('Redo successful.', 'info');\n }\n }\n\n /**\n * Handle keyboard shortcuts for undo/redo.\n */\n @HostListener('document:keydown', ['$event'])\n handleKeyboardShortcuts(event: KeyboardEvent): void {\n // Skip if user is typing in an input field\n const target = event.target as HTMLElement;\n if (target.tagName === 'INPUT' || target.tagName === 'TEXTAREA') {\n return;\n }\n\n // Ctrl+Z or Cmd+Z for undo\n if ((event.ctrlKey || event.metaKey) && event.key === 'z' && !event.shiftKey) {\n event.preventDefault();\n this.undo();\n }\n\n // Ctrl+Y or Cmd+Shift+Z for redo\n if ((event.ctrlKey || event.metaKey) && (event.key === 'y' || (event.key === 'z' && event.shiftKey))) {\n event.preventDefault();\n this.redo();\n }\n }\n\n // Video preview controls"
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[2025-12-22T21:48:18.500Z] [INFO] {
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"content": "The file /tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts has been updated. Here's the result of running `cat -n` on a snippet of the edited file:\n 864→\n 865→ // Clear LocalStorage\n 866→ this.storageService.clearState();\n 867→\n 868→ // Show notification\n 869→ this.notificationsComponent?.showNotification(\n 870→ 'New project created. Timeline cleared.',\n 871→ 'success'\n 872→ );\n 873→\n 874→ // Clear undo/redo history when creating a new project\n 875→ this.historyService.clearHistory();\n 876→ }\n 877→\n 878→ /**\n 879→ * Push current state to history before making a change.\n 880→ * Should be called at the start of any operation that modifies the timeline.\n 881→ */\n 882→ private saveStateToHistory(): void {\n 883→ this.historyService.pushState(this.state());\n 884→ }\n 885→\n 886→ /**\n 887→ * Undo the last action.\n 888→ * Restores the previous timeline state.\n 889→ */\n 890→ undo(): void {\n 891→ const previousState = this.historyService.undo(this.state());\n 892→ if (previousState) {\n 893→ this.state.set(previousState);\n 894→\n 895→ // Sync playback service with new state\n 896→ this.playbackService.seek(previousState.tracks, previousState.playheadPosition);\n 897→\n 898→ this.notificationsComponent?.showNotification('Undo successful.', 'info');\n 899→ }\n 900→ }\n 901→\n 902→ /**\n 903→ * Redo the last undone action.\n 904→ * Restores the next timeline state.\n 905→ */\n 906→ redo(): void {\n 907→ const nextState = this.historyService.redo(this.state());\n 908→ if (nextState) {\n 909→ this.state.set(nextState);\n 910→\n 911→ // Sync playback service with new state\n 912→ this.playbackService.seek(nextState.tracks, nextState.playheadPosition);\n 913→\n 914→ this.notificationsComponent?.showNotification('Redo successful.', 'info');\n 915→ }\n 916→ }\n 917→\n 918→ /**\n 919→ * Handle keyboard shortcuts for undo/redo.\n 920→ */\n 921→ @HostListener('document:keydown', ['$event'])\n 922→ handleKeyboardShortcuts(event: KeyboardEvent): void {\n 923→ // Skip if user is typing in an input field\n 924→ const target = event.target as HTMLElement;\n 925→ if (target.tagName === 'INPUT' || target.tagName === 'TEXTAREA') {\n 926→ return;\n 927→ }\n 928→\n 929→ // Ctrl+Z or Cmd+Z for undo\n 930→ if ((event.ctrlKey || event.metaKey) && event.key === 'z' && !event.shiftKey) {\n 931→ event.preventDefault();\n 932→ this.undo();\n 933→ }\n 934→\n 935→ // Ctrl+Y or Cmd+Shift+Z for redo\n 936→ if ((event.ctrlKey || event.metaKey) && (event.key === 'y' || (event.key === 'z' && event.shiftKey))) {\n 937→ event.preventDefault();\n 938→ this.redo();\n 939→ }\n 940→ }\n 941→\n 942→ // Video preview controls\n 943→ togglePlayback(): void {\n 944→ const currentState = this.state();\n 945→\n 946→ if (this.playbackService.isPlaying()) {"
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"filePath": "/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts",
"oldString": " // Show notification\n this.notificationsComponent?.showNotification(\n 'New project created. Timeline cleared.',\n 'success'\n );\n }\n\n // Video preview controls",
"newString": " // Show notification\n this.notificationsComponent?.showNotification(\n 'New project created. Timeline cleared.',\n 'success'\n );\n\n // Clear undo/redo history when creating a new project\n this.historyService.clearHistory();\n }\n\n /**\n * Push current state to history before making a change.\n * Should be called at the start of any operation that modifies the timeline.\n */\n private saveStateToHistory(): void {\n this.historyService.pushState(this.state());\n }\n\n /**\n * Undo the last action.\n * Restores the previous timeline state.\n */\n undo(): void {\n const previousState = this.historyService.undo(this.state());\n if (previousState) {\n this.state.set(previousState);\n\n // Sync playback service with new state\n this.playbackService.seek(previousState.tracks, previousState.playheadPosition);\n\n this.notificationsComponent?.showNotification('Undo successful.', 'info');\n }\n }\n\n /**\n * Redo the last undone action.\n * Restores the next timeline state.\n */\n redo(): void {\n const nextState = this.historyService.redo(this.state());\n if (nextState) {\n this.state.set(nextState);\n\n // Sync playback service with new state\n this.playbackService.seek(nextState.tracks, nextState.playheadPosition);\n\n this.notificationsComponent?.showNotification('Redo successful.', 'info');\n }\n }\n\n /**\n * Handle keyboard shortcuts for undo/redo.\n */\n @HostListener('document:keydown', ['$event'])\n handleKeyboardShortcuts(event: KeyboardEvent): void {\n // Skip if user is typing in an input field\n const target = event.target as HTMLElement;\n if (target.tagName === 'INPUT' || target.tagName === 'TEXTAREA') {\n return;\n }\n\n // Ctrl+Z or Cmd+Z for undo\n if ((event.ctrlKey || event.metaKey) && event.key === 'z' && !event.shiftKey) {\n event.preventDefault();\n this.undo();\n }\n\n // Ctrl+Y or Cmd+Shift+Z for redo\n if ((event.ctrlKey || event.metaKey) && (event.key === 'y' || (event.key === 'z' && event.shiftKey))) {\n event.preventDefault();\n this.redo();\n }\n }\n\n // Video preview controls",
"originalFile": "import { Component, signal, computed, ViewChild, ElementRef, AfterViewInit, OnDestroy, effect, HostListener } from '@angular/core';\nimport { CommonModule } from '@angular/common';\nimport { MediaType, MediaItem, Track, TimelineState } from '../../models/timeline.models';\nimport { MediaLibraryComponent, MediaLibraryItem } from '../media-library/media-library.component';\nimport { Media***********onent } from '../media-toolbar/media-toolbar.component';\nimport { Notif************onent } from '../notifications/notifications.component';\nimport { Timel*************rvice } from '../../services/timeline-drag-drop.service';\nimport { PlaybackService } from '../../services/playback.service';\nimport { Timel************rvice } from '../../services/timeline-storage.service';\nimport { Timel************rvice } from '../../services/timeline-history.service';\n\n@Component({\n selector: 'app-timeline',\n standalone: true,\n imports: [CommonModule, MediaLibraryComponent, MediaToolbarComponent, NotificationsComponent],\n templateUrl: './timeline.component.html',\n styleUrl: './timeline.component.css'\n})\nexport class TimelineComponent implements AfterViewInit, OnDestroy {\n // Zoom levels: pixels per second\n private readonly MIN_ZOOM = 10;\n private readonly MAX_ZOOM = 200;\n private readonly ZOOM_STEP = 20;\n readonly TRACK_HEADER_WIDTH = 150; // Width of track header in pixels\n private readonly SNAP_PROXIMITY_MS = 500; // Snap to item if playhead is within 500ms\n private readonly MIN_ITEM_DURATION = 100; // Minimum item duration in milliseconds\n\n // Canvas dimensions for preview\n readonly PREVIEW_WIDTH = 640;\n readonly PREVIEW_HEIGHT = 360;\n\n // View references\n @ViewChild('timelineRuler') timelineRuler?: ElementRef<HTMLElement>;\n @ViewChild('notifications') notificationsComponent?: NotificationsComponent;\n @ViewChild('previewCanvas') previewCanvas?: ElementRef<HTMLCanvasElement>;\n\n // Timeline state\n readonly state = signal<TimelineState>({\n tracks: [\n { id: '1', name: 'Track 1', order: 0, items: [] },\n { id: '2', name: 'Track 2', order: 1, items: [] }\n ],\n playheadPosition: 0,\n zoomLevel: 50, // pixels per second\n totalDuration: 120000, // 120 seconds in milliseconds\n selectedItemId: null\n });\n\n // Computed values\n readonly pixel**********econd = computed(() => {\n return this.state().zoomLevel / 1000;\n });\n\n readonly timelineWidth = computed(() => {\n const state = this.state();\n // Calculate the maximum end time across all tracks\n let maxEndTime = state.totalDuration;\n\n for (const track of state.tracks) {\n for (const item of track.items) {\n const itemEndTime = item.startTime + item.duration;\n if (itemEndTime > maxEndTime) {\n maxEndTime = itemEndTime;\n }\n }\n }\n\n return maxEndTime * this.pixelsPerMillisecond();\n });\n\n readonly timelineLineHeight = computed(() => {\n const state = this.state();\n return state.tracks.length * 60 + 32;\n });\n\n readonly playheadPosition = computed(() => {\n return this.state().playheadPosition * this.pixelsPerMillisecond();\n });\n\n readonly playh************ition = computed(() => {\n return this.playheadPosition() + this.TRACK_HEADER_WIDTH;\n });\n\n // Computed: whether a media item is currently selected\n readonly hasSelectedItem = computed(() => {\n return this.state().selectedItemId !== null;\n });\n\n // Dragging state\n private draggedItem: MediaItem | null = null;\n private draggedItemOriginalTrackId: string | null = null;\n private dragOffsetTime: number = 0; // Offset in milliseconds from item start to cursor position\n private isDraggingPlayhead = false;\n private isDraggingFromRuler = false;\n private resizingItem: { item: MediaItem; edge: 'left' | 'right' } | null = null;\n private mouseDownPosition: { x: number; y: number } | null = null; // Track mouse down position for click detection\n\n // Video preview state\n readonly isPlaying = signal<boolean>(false);\n\n // Duration editor state\n readonly showDurationEditor = signal<boolean>(false);\n private editedDuration: number = 120; // Duration in seconds\n\n // Media library state\n readonly showMediaLibrary = signal<boolean>(false);\n private mediaLibraryTargetTrackId: string | null = null;\n\n // Clipboard state for copy/paste functionality\n private readonly clipboardItem = signal<MediaItem | null>(null);\n private readonly clipb************ackId = signal<string | null>(null);\n\n // Computed: whether a media item is in clipboard\n readonly hasClipboardItem = computed(() => {\n return this.clipboardItem() !== null;\n });\n\n // Computed: whether undo/redo is available\n readonly canUndo = computed(() => this.historyService.canUndo());\n readonly canRedo = computed(() => this.historyService.canRedo());\n\n // Render loop ID for cleanup\n private renderLoopId: number | null = null;\n\n constructor(\n private dragDropService: TimelineDragDropService,\n public playbackService: PlaybackService,\n private storageService: TimelineStorageService,\n private historyService: TimelineHistoryService\n ) {\n // Load saved state from LocalStorage on initialization\n const savedState = this.storageService.loadState();\n if (savedState) {\n this.state.set(savedState);\n }\n\n // Effect to sync playhead position from PlaybackService during playback\n effect(() => {\n if (this.playbackService.isPlaying()) {\n const position = this.playbackService.playheadPosition();\n this.state.update(s => ({\n ...s,\n playheadPosition: position\n }));\n }\n });\n\n // Effect to auto-save timeline state to LocalStorage on any change\n effect(() => {\n const currentState = this.state();\n this.storageService.saveState(currentState);\n });\n }\n\n ngAfterViewInit(): void {\n // Initialize canvas for preview rendering\n if (this.previewCanvas) {\n this.playbackService.setCanvas(this.previewCanvas.nativeElement);\n }\n\n // Start continuous render loop for preview (renders current frame even when paused)\n this.startRenderLoop();\n\n // Synchronize media and render initial frame if state was loaded from LocalStorage\n const currentState = this.state();\n if (currentState.tracks.length > 0) {\n this.playbackService.seek(currentState.tracks, currentState.playheadPosition);\n }\n }\n\n ngOnDestroy(): void {\n // Clean up render loop\n if (this.renderLoopId !== null) {\n cancelAnimationFrame(this.renderLoopId);\n this.renderLoopId = null;\n }\n\n // Stop playback\n this.playbackService.stop();\n }\n\n /**\n * Continuous render loop for preview canvas.\n * Keeps rendering even when paused so seeking updates the preview.\n */\n private startRenderLoop(): void {\n const render = () => {\n // Only render if we have active media and are not playing\n // (PlaybackService handles rendering during playback)\n if (!this.playbackService.isPlaying()) {\n this.playbackService.renderCurrentFrame();\n }\n this.renderLoopId = requestAnimationFrame(render);\n };\n this.renderLoopId = requestAnimationFrame(render);\n }\n\n // Track management\n addTrack(): void {\n const currentState = this.state();\n const newTrack: Track = {\n id: `track-${Date.now()}`,\n name: `Track ${currentState.tracks.length + 1}`,\n order: currentState.tracks.length,\n items: []\n };\n\n this.state.update(s => ({\n ...s,\n tracks: [...s.tracks, newTrack]\n }));\n\n // Show notification for adding track\n this.notificationsComponent?.showNotification(\n `Track \"${newTrack.name}\" added.`,\n 'success'\n );\n }\n\n removeTrack(trackId: string): void {\n const currentState = this.state();\n if (currentState.tracks.length <= 1) {\n return; // Keep at least one track\n }\n\n // Get track name before removing\n const trackToRemove = currentState.tracks.find(t => t.id === trackId);\n const trackName = trackToRemove?.name || 'Track';\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.filter(t => t.id !== trackId)\n }));\n\n // Show notification for removing track\n this.notificationsComponent?.showNotification(\n `Track \"${trackName}\" removed.`,\n 'info'\n );\n }\n\n // Zoom controls\n zoomIn(): void {\n this.state.update(s => ({\n ...s,\n zoomLevel: Math.min(s.zoomLevel + this.ZOOM_STEP, this.MAX_ZOOM)\n }));\n }\n\n zoomOut(): void {\n this.state.update(s => ({\n ...s,\n zoomLevel: Math.max(s.zoomLevel - this.ZOOM_STEP, this.MIN_ZOOM)\n }));\n }\n\n // Utility method to extract coordinates from mouse or touch events\n private getEventCoordinates(event: MouseEvent | TouchEvent): { clientX: number; clientY: number } {\n if (event instanceof MouseEvent) {\n return { clientX: event.clientX, clientY: event.clientY };\n } else {\n const touch = event.touches[0] || event.changedTouches[0];\n return { clientX: touch.clientX, clientY: touch.clientY };\n }\n }\n\n // Playhead controls\n onRulerPointerDown(event: MouseEvent | TouchEvent): void {\n event.preventDefault();\n this.isDraggingFromRuler = true;\n\n // Immediately update position on pointer down\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n const coords = this.getEventCoordinates(event);\n // Calculate position within the ruler element\n // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n const x = coords.clientX - rect.left;\n const newPosition = x / this.pixelsPerMillisecond();\n const currentState = this.state();\n const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n\n this.state.update(s => ({\n ...s,\n playheadPosition: clampedPosition\n }));\n\n // Sync position to playback service for seeking\n this.playbackService.seek(currentState.tracks, clampedPosition);\n }\n\n onPlayheadPointerDown(event: MouseEvent | TouchEvent): void {\n event.preventDefault();\n event.stopPropagation();\n this.isDraggingPlayhead = true;\n }\n\n\n // Media item drag and drop\n onMediaItemPointerDown(event: MouseEvent | TouchEvent, item: MediaItem, track: Track): void {\n const target = event.target as HTMLElement;\n\n // Check if clicking/touching on resize handle\n if (target.classList.contains('resize-handle')) {\n this.resizingItem = {\n item,\n edge: target.classList.contains('resize-handle-left') ? 'left' : 'right'\n };\n event.preventDefault();\n return;\n }\n\n const coords = this.getEventCoordinates(event);\n this.mouseDownPosition = { x: coords.clientX, y: coords.clientY };\n\n const mediaItemElement = event.currentTarget as HTMLElement;\n const rect = mediaItemElement.getBoundingClientRect();\n const clickX = coords.clientX - rect.left;\n\n // Convert pixel offset to time offset\n this.dragOffsetTime = clickX / this.pixelsPerMillisecond();\n\n this.draggedItem = item;\n this.draggedItemOriginalTrackId = track.id;\n event.preventDefault();\n }\n\n onTrackPointerDown(event: MouseEvent | TouchEvent): void {\n // Deselect when clicking/touching track background (not on media item)\n const target = event.target as HTMLElement;\n if (target.classList.contains('track')) {\n this.deselectMediaItem();\n }\n }\n\n onTrackPointerMove(event: MouseEvent | TouchEvent, track: Track): void {\n if (this.resizingItem) {\n this.handleResize(event, track);\n return;\n }\n event.preventDefault();\n event.stopPropagation();\n\n if (!this.draggedItem) return;\n\n const coords = this.getEventCoordinates(event);\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n const x = coords.clientX - rect.left;\n const requestedStartTime = Math.max(0, x / this.pixelsPerMillisecond() - this.dragOffsetTime);\n\n this.state.update(s => {\n const updatedTracks = s.tracks.map(t => {\n if (t.id === track.id) {\n // Get all items except the dragged one for collision detection\n const otherItems = t.items.filter(i => i.id !== this.draggedItem!.id);\n\n // Fix for issue #81: Find snap targets (playhead and items on all tracks)\n const snapTargets = this.dragDropService.findSnapTargets(\n this.draggedItem!.id,\n s.tracks,\n s.playheadPosition\n );\n\n // Calculate valid position and duration considering collisions, gap fitting, and snapping\n const validPosition = this.dragDropService.getValidDragPosition(\n this.draggedItem!,\n requestedStartTime,\n otherItems,\n s.totalDuration,\n snapTargets\n );\n\n // Check if item already exists in this track\n const itemExists = t.items.some(i => i.id === this.draggedItem!.id);\n\n if (itemExists) {\n // Update position and duration in current track\n return {\n ...t,\n items: t.items.map(i =>\n i.id === this.draggedItem!.id\n ? {\n ...i,\n startTime: validPosition.startTime,\n duration: validPosition.duration,\n trackId: track.id\n }\n : i\n )\n };\n } else {\n // Add to new track with adjusted position and duration\n return {\n ...t,\n items: [\n ...otherItems,\n {\n ...this.draggedItem!,\n startTime: validPosition.startTime,\n duration: validPosition.duration,\n trackId: track.id\n }\n ]\n };\n }\n } else if (t.id === this.draggedItemOriginalTrackId && t.id !== track.id) {\n // Remove from original track only if moving to different track\n return {\n ...t,\n items: t.items.filter(i => i.id !== this.draggedItem!.id)\n };\n }\n return t;\n });\n\n // Update the original track ID to current track for smooth dragging within same track\n this.draggedItemOriginalTrackId = track.id;\n\n return { ...s, tracks: updatedTracks };\n });\n }\n\n private handleResize(event: MouseEvent | TouchEvent, track: Track): void {\n if (!this.resizingItem) return;\n\n const coords = this.getEventCoordinates(event);\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n // Fix for issue #83: getBoundingClientRect() returns viewport-relative coordinates,\n // and coords.clientX is also viewport-relative, so we don't need to add scrollLeft\n const x = coords.clientX - rect.left;\n const timeAtCursor = x / this.pixelsPerMillisecond();\n\n this.state.update(s => {\n // Fix for issue #87: Find snap targets for resize operations\n const snapTargets = this.dragDropService.findSnapTargets(\n this.resizingItem!.item.id,\n s.tracks,\n s.playheadPosition\n );\n\n const updatedTracks = s.tracks.map(t => {\n if (t.id === track.id) {\n // Get resize bounds considering adjacent items\n const bounds = this.dragDropService.getResizeBounds(\n this.resizingItem!.item,\n t.items,\n this.resizingItem!.edge,\n s.totalDuration\n );\n\n return {\n ...t,\n items: t.items.map(i => {\n if (i.id === this.resizingItem!.item.id) {\n if (this.resizingItem!.edge === 'left') {\n // Fix for issue #89: Handle mediaStartTime when resizing from left\n // Apply snapping to left edge (start time)\n let newStartTime = Math.max(\n bounds.minTime,\n Math.min(timeAtCursor, bounds.maxTime)\n );\n\n // Apply snapping if within snap distance\n let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n for (const target of snapTargets) {\n const distance = Math.abs(newStartTime - target);\n if (distance < minDistance) {\n minDistance = distance;\n // Only snap if within bounds\n if (target >= bounds.minTime && target <= bounds.maxTime) {\n newStartTime = target;\n }\n }\n }\n\n // Calculate how much the timeline position is changing\n const deltaTime = newStartTime - i.startTime;\n const newDuration = i.duration - deltaTime;\n\n // Update media start time (trimming from source media)\n const curre***********tTime = i.mediaStartTime || 0;\n const newMediaStartTime = curre***********tTime + deltaTime;\n\n // Check if we're trying to extend beyond the start of source media\n if (newMediaStartTime < 0) {\n // Can only extend left by curre***********tTime amount\n const maxExtension = currentMediaStartTime;\n const finalStartTime = i.startTime - maxExtension;\n const finalDuration = i.duration + maxExtension;\n\n // Ensure we don't exceed maxDuration\n if (i.maxDuration && finalDuration > i.maxDuration) {\n return {\n ...i,\n startTime: finalStartTime + (finalDuration - i.maxDuration),\n duration: i.maxDuration,\n mediaStartTime: 0\n };\n }\n\n return {\n ...i,\n startTime: finalStartTime,\n duration: finalDuration,\n mediaStartTime: 0\n };\n }\n\n // Ensure media end doesn't exceed maxDuration\n if (i.maxDuration && newMediaStartTime + newDuration > i.maxDuration) {\n const maxAllowedDuration = i.maxDuration - newMediaStartTime;\n return {\n ...i,\n startTime: i.startTime + (i.duration - maxAllowedDuration),\n duration: maxAllowedDuration,\n mediaStartTime: newMediaStartTime\n };\n }\n\n return {\n ...i,\n startTime: newStartTime,\n duration: newDuration,\n mediaStartTime: newMediaStartTime\n };\n } else {\n // Fix for issue #87: Apply snapping to right edge (end time)\n let newEndTime = Math.max(\n bounds.minTime,\n Math.min(timeAtCursor, bounds.maxTime)\n );\n\n // Apply snapping if within snap distance\n let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n for (const target of snapTargets) {\n const distance = Math.abs(newEndTime - target);\n if (distance < minDistance) {\n minDistance = distance;\n // Only snap if within bounds\n if (target >= bounds.minTime && target <= bounds.maxTime) {\n newEndTime = target;\n }\n }\n }\n\n const newDuration = newEndTime - i.startTime;\n\n // Limit duration by maxDuration if specified\n const limitedDuration = i.maxDuration\n ? Math.min(newDuration, i.maxDuration)\n : newDuration;\n\n return { ...i, duration: limitedDuration };\n }\n }\n return i;\n })\n };\n }\n return t;\n });\n\n return { ...s, tracks: updatedTracks };\n });\n }\n\n onPointerUp(event: MouseEvent | TouchEvent): void {\n // Detect if this was a click/tap (not a drag) on a media item\n if (this.draggedItem && this.mouseDownPosition) {\n const coords = this.getEventCoordinates(event);\n const dx = coords.clientX - this.mouseDownPosition.x;\n const dy = coords.clientY - this.mouseDownPosition.y;\n const distance = Math.sqrt(dx * dx + dy * dy);\n\n // If pointer moved less than 5 pixels, consider it a click/tap\n if (distance < 5) {\n this.selectMediaItem(this.draggedItem.id);\n }\n }\n\n this.draggedItem = null;\n this.draggedItemOriginalTrackId = null;\n this.dragOffsetTime = 0;\n this.isDraggingPlayhead = false;\n this.isDraggingFromRuler = false;\n this.resizingItem = null;\n this.mouseDownPosition = null;\n }\n\n onDocumentPointerMove(event: MouseEvent | TouchEvent): void {\n if (this.isDraggingPlayhead || this.isDraggingFromRuler) {\n // Fix for issue #50: Use ViewChild reference to ensure we use the exact same element as onRulerPointerDown\n if (!this.timelineRuler) {\n return;\n }\n\n const coords = this.getEventCoordinates(event);\n const rulerElement = this.timelineRuler.nativeElement;\n // Use the same calculation as onRulerPointerDown\n // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n const rect = rulerElement.getBoundingClientRect();\n const x = coords.clientX - rect.left;\n const newPosition = x / this.pixelsPerMillisecond();\n const currentState = this.state();\n const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n\n this.state.update(s => ({\n ...s,\n playheadPosition: clampedPosition\n }));\n\n // Sync position to playback service for seeking (but don't call too frequently during drag)\n this.playbackService.seek(currentState.tracks, clampedPosition);\n }\n\n // Fix for issue #96: Handle media item dragging and resizing at document level for touch events\n // This allows dragging between tracks on mobile devices\n if (event instanceof TouchEvent) {\n if (this.draggedItem) {\n // Find which track the touch is currently over\n const targetTrack = this.findTrackAtCoordinates(this.getEventCoordinates(event));\n if (targetTrack) {\n // Reuse existing drag logic\n this.onTrackPointerMove(event, targetTrack);\n }\n } else if (this.resizingItem) {\n // Find the track that contains the resizing item\n const targetTrack = this.findTrackContainingItem(this.resizingItem.item.id);\n if (targetTrack) {\n // Reuse existing resize logic\n this.handleResize(event, targetTrack);\n }\n }\n }\n }\n\n // Helper method to find which track is at the given Y coordinate\n private findTrackAtCoordinates(coords: { clientX: number; clientY: number }): Track | null {\n const trackElements = document.querySelectorAll('.track');\n for (const trackElement of Array.from(trackElements)) {\n const rect = trackElement.getBoundingClientRect();\n if (coords.clientY >= rect.top && coords.clientY <= rect.bottom) {\n const trackIndex = Array.from(trackElements).indexOf(trackElement);\n const tracks = this.state().tracks;\n if (trackIndex >= 0 && trackIndex < tracks.length) {\n return tracks[trackIndex];\n }\n }\n }\n return null;\n }\n\n // Helper method to find the track containing a specific item\n private findTrackContainingItem(itemId: string): Track | null {\n const currentState = this.state();\n for (const track of currentState.tracks) {\n if (track.items.some(item => item.id === itemId)) {\n return track;\n }\n }\n return null;\n }\n\n // Helper methods\n getItemStyle(item: MediaItem) {\n return {\n left: `${item.startTime * this.pixelsPerMillisecond()}px`,\n width: `${item.duration * this.pixelsPerMillisecond()}px`\n };\n }\n\n getMediaTypeClass(type: MediaType): string {\n return `media-${type}`;\n }\n\n formatTime(milliseconds: number): string {\n const seconds = Math.floor(milliseconds / 1000);\n const minutes = Math.floor(seconds / 60);\n const remainingSeconds = seconds % 60;\n const cs = Math.floor((milliseconds % 1000) / 10);\n return `${minutes}:${remainingSeconds.toString().padStart(2, '0')}.${cs.toString().padStart(2, '0')}`;\n }\n\n /**\n * Calculate appropriate time interval for markers based on zoom level\n * to prevent marker labels from overlapping\n */\n private getMarkerInterval(): number {\n // Minimum spacing between markers in pixels to prevent overlap\n // Enough space for \"0:00.000\" text (about 50-60px)\n const MIN_M***********NG_PX = 60;\n\n // Calculate how much time represents MIN_M***********NG_PX at current zoom\n const pixelsPerMs = this.pixelsPerMillisecond();\n const minTimeSpacing = MIN_M***********NG_PX / pixelsPerMs;\n\n // Define possible intervals (in ms): 100ms, 250ms, 500ms, 1s, 2s, 5s, 10s, 30s, 60s\n const intervals = [100, 250, 500, 1000, 2000, 5000, 10000, 30000, 60000];\n\n // Find the smallest interval that's larger than or equal to minTimeSpacing\n for (const interval of intervals) {\n if (interval >= minTimeSpacing) {\n return interval;\n }\n }\n\n // If even 60s is too small, use larger intervals\n return Math.ceil(minTimeSpacing / 60000) * 60000;\n }\n\n getTimeMarkers(): { position: number; label: string }[] {\n const markers: { position: number; label: string }[] = [];\n const stepMs = this.getMarkerInterval(); // Dynamic interval based on zoom level\n\n // Fix for issue #85: Do not show the last time mark at totalDuration\n // to prevent container expansion from the text label\n for (let time = 0; time < this.state().totalDuration; time += stepMs) {\n markers.push({\n position: time * this.pixelsPerMillisecond(),\n label: this.formatTime(time)\n });\n }\n\n return markers;\n }\n\n // Add placeholder media item\n addMediaItem(type: MediaType, trackId: string): void {\n const currentState = this.state();\n const track = currentState.tracks.find(t => t.id === trackId);\n\n if (!track) return;\n\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n const newItemDuration = type === MediaType.IMAGE ? 5000 : 3000;\n\n // Determine the start time for the new item using the service\n const startTime = this.dragDropService.calculateNewItemStartTime(\n playheadTime,\n track.items,\n this.SNAP_PROXIMITY_MS\n );\n\n // Fix for issue #48: Ensure new item doesn't exceed totalDuration\n const maxAllowedDuration = totalDuration - startTime;\n const finalDuration = Math.min(newItemDuration, maxAllowedDuration);\n\n // Fix for issue #64: Verify that the new item doesn't overlap with any existing items\n const testItem: MediaItem = {\n id: 'temp',\n type,\n startTime,\n duration: finalDuration,\n trackId,\n name: '',\n isPlaceholder: true\n };\n\n // Validate and adjust position if needed\n const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n\n // Recalculate duration limit if position was adjusted\n const adjus****************ation = totalDuration - validatedStartTime;\n const adjustedDuration = Math.min(newItemDuration, adjustedMaxAllowedDuration);\n\n // Create the final non-overlapping item\n const newItem: MediaItem = {\n id: `item-${Date.now()}`,\n type,\n startTime: validatedStartTime,\n duration: adjustedDuration,\n trackId,\n name: `${type} placeholder`,\n isPlaceholder: true\n };\n\n // Set maxDuration for audio and video placeholders\n if (type === MediaType.VIDEO) {\n newItem.maxDuration = Math.min(10000, adjustedMaxAllowedDuration); // 10 seconds default for video\n } else if (type === MediaType.AUDIO) {\n newItem.maxDuration = Math.min(15000, adjustedMaxAllowedDuration); // 15 seconds default for audio\n }\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === trackId\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n // Show notification for adding media\n this.notificationsComponent?.showNotification(\n 'Media added to timeline.',\n 'success'\n );\n }\n\n removeMediaItem(itemId: string, trackId: string): void {\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === trackId\n ? { ...t, items: t.items.filter(i => i.id !== itemId) }\n : t\n ),\n // Deselect if removing selected item\n selectedItemId: s.selectedItemId === itemId ? null : s.selectedItemId\n }));\n\n // Show notification for removing media\n this.notificationsComponent?.showNotification(\n 'Media removed from timeline.',\n 'info'\n );\n }\n\n // Media selection\n selectMediaItem(itemId: string): void {\n this.state.update(s => ({\n ...s,\n selectedItemId: itemId\n }));\n }\n\n deselectMediaItem(): void {\n this.state.update(s => ({\n ...s,\n selectedItemId: null\n }));\n }\n\n isItemSelected(itemId: string): boolean {\n return this.state().selectedItemId === itemId;\n }\n\n readonly MediaType = MediaType;\n\n /**\n * Create a new project by clearing the timeline and LocalStorage\n */\n newProject(): void {\n // Stop playback if playing\n if (this.playbackService.isPlaying()) {\n this.playbackService.stop();\n this.isPlaying.set(false);\n }\n\n // Reset timeline state to initial values\n this.state.set({\n tracks: [\n { id: '1', name: 'Track 1', order: 0, items: [] },\n { id: '2', name: 'Track 2', order: 1, items: [] }\n ],\n playheadPosition: 0,\n zoomLevel: 50,\n totalDuration: 120000,\n selectedItemId: null\n });\n\n // Clear LocalStorage\n this.storageService.clearState();\n\n // Show notification\n this.notificationsComponent?.showNotification(\n 'New project created. Timeline cleared.',\n 'success'\n );\n }\n\n // Video preview controls\n togglePlayback(): void {\n const currentState = this.state();\n\n if (this.playbackService.isPlaying()) {\n this.playbackService.pause();\n this.isPlaying.set(false);\n } else {\n // Sync playhead position to PlaybackService before starting\n this.playbackService.setPlayheadPosition(currentState.playheadPosition);\n this.playbackService.play(currentState.tracks, currentState.totalDuration);\n this.isPlaying.set(true);\n }\n }\n\n skipBackward(): void {\n const currentState = this.state();\n const newPosition = Math.max(0, currentState.playheadPosition - 5000);\n\n this.state.update(s => ({\n ...s,\n playheadPosition: newPosition\n }));\n\n // Sync position and update media\n this.playbackService.seek(currentState.tracks, newPosition);\n }\n\n skipForward(): void {\n const currentState = this.state();\n const newPosition = Math.min(currentState.totalDuration, currentState.playheadPosition + 5000);\n\n this.state.update(s => ({\n ...s,\n playheadPosition: newPosition\n }));\n\n // Sync position and update media\n this.playbackService.seek(currentState.tracks, newPosition);\n }\n\n // Duration editor methods\n openDurationEditor(): void {\n this.editedDuration = this.state().totalDuration / 1000;\n this.showDurationEditor.set(true);\n }\n\n closeDurationEditor(): void {\n this.showDurationEditor.set(false);\n }\n\n onDurationInputChange(event: Event): void {\n const input = event.target as HTMLInputElement;\n const value = parseFloat(input.value);\n if (!isNaN(value) && value > 0) {\n this.editedDuration = value;\n }\n }\n\n saveDuration(): void {\n const newDurationMs = Math.max(1000, this.editedDuration * 1000); // At least 1 second\n this.state.update(s => ({\n ...s,\n totalDuration: newDurationMs,\n // Ensure playhead doesn't exceed new duration\n playheadPosition: Math.min(s.playheadPosition, newDurationMs)\n }));\n this.closeDurationEditor();\n }\n\n // Media library methods\n openMediaLibrary(trackId: string): void {\n this.mediaLibraryTargetTrackId = trackId;\n this.showMediaLibrary.set(true);\n }\n\n closeMediaLibrary(): void {\n this.showMediaLibrary.set(false);\n this.mediaLibraryTargetTrackId = null;\n }\n\n onMediaSelected(media: MediaLibraryItem): void {\n if (!this.mediaLibraryTargetTrackId) return;\n\n const currentState = this.state();\n const track = currentState.tracks.find(t => t.id === this.mediaLibraryTargetTrackId);\n\n if (!track) return;\n\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n\n // Determine the start time for the new item using the service\n const startTime = this.dragDropService.calculateNewItemStartTime(\n playheadTime,\n track.items,\n this.SNAP_PROXIMITY_MS\n );\n\n // Ensure item doesn't exceed totalDuration\n const maxAllowedDuration = totalDuration - startTime;\n const finalDuration = Math.min(media.duration, maxAllowedDuration);\n\n // Verify that the new item doesn't overlap with any existing items\n const testItem: MediaItem = {\n id: 'temp',\n type: media.type,\n startTime,\n duration: finalDuration,\n trackId: this.mediaLibraryTargetTrackId,\n name: '',\n isPlaceholder: false\n };\n\n // Validate and adjust position if needed\n const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n\n // Recalculate duration limit if position was adjusted\n const adjus****************ation = totalDuration - validatedStartTime;\n const adjustedDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n\n // Create the final non-overlapping item\n const newItem: MediaItem = {\n id: `item-${Date.now()}`,\n type: media.type,\n startTime: validatedStartTime,\n duration: adjustedDuration,\n trackId: this.mediaLibraryTargetTrackId,\n name: media.name,\n url: media.url, // Pass URL from media library for playback\n isPlaceholder: false\n };\n\n // Set maxDuration for audio and video\n if (media.type === MediaType.VIDEO) {\n newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n } else if (media.type === MediaType.AUDIO) {\n newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n }\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === this.mediaLibraryTargetTrackId\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n // Show notification for adding media\n this.notificationsComponent?.showNotification(\n `\"${media.name}\" added to timeline.`,\n 'success'\n );\n\n // Close the media library after selection\n this.closeMediaLibrary();\n }\n\n /**\n * Trim (split) the selected media item at the playhead position.\n * Creates two separate items from the original media.\n */\n trimSelectedMedia(): void {\n const currentState = this.state();\n const selectedItemId = currentState.selectedItemId;\n\n if (!selectedItemId) {\n return;\n }\n\n // Find the selected item and its track\n let selectedItem: MediaItem | null = null;\n let selectedTrack: Track | null = null;\n\n for (const track of currentState.tracks) {\n const item = track.items.find(i => i.id === selectedItemId);\n if (item) {\n selectedItem = item;\n selectedTrack = track;\n break;\n }\n }\n\n if (!selectedItem || !selectedTrack) {\n return;\n }\n\n const playheadTime = currentState.playheadPosition;\n const itemStart = selectedItem.startTime;\n const itemEnd = itemStart + selectedItem.duration;\n\n // Check if playhead is within the selected media item\n if (playheadTime <= itemStart || playheadTime >= itemEnd) {\n // Playhead is not within the selected media - show notification\n this.notificationsComponent?.showNotification(\n 'Position the playhead within the selected media to trim it.',\n 'warning'\n );\n return;\n }\n\n // Ensure both parts will have at least MIN_ITEM_DURATION\n const firstPartDuration = playheadTime - itemStart;\n const secondPartDuration = itemEnd - playheadTime;\n\n if (firstPartDuration < this.MIN_ITEM_DURATION || secondPartDuration < this.MIN_ITEM_DURATION) {\n this.notificationsComponent?.showNotification(\n 'Cannot trim: resulting parts would be too short.',\n 'warning'\n );\n return;\n }\n\n // Calculate mediaStartTime adjustments\n const origi************tTime = selectedItem.mediaStartTime || 0;\n const secon**************tTime = origi************tTime + firstPartDuration;\n\n // Create two new items from the original\n const firstPart: MediaItem = {\n ...selectedItem,\n id: `item-${Date.now()}-1`,\n duration: firstPartDuration\n // mediaStartTime stays the same for first part\n };\n\n const secondPart: MediaItem = {\n ...selectedItem,\n id: `item-${Date.now()}-2`,\n startTime: playheadTime,\n duration: secondPartDuration,\n mediaStartTime: secondPartMediaStartTime\n };\n\n // Update the state: remove original, add two new parts\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t => {\n if (t.id === selectedTrack!.id) {\n return {\n ...t,\n items: [\n ...t.items.filter(i => i.id !== selectedItemId),\n firstPart,\n secondPart\n ]\n };\n }\n return t;\n }),\n // Deselect after trimming\n selectedItemId: null\n }));\n\n this.notificationsComponent?.showNotification(\n 'Media trimmed successfully.',\n 'success'\n );\n }\n\n /**\n * Copy the selected media item to the clipboard.\n * Stores a copy of the item and the track it was copied from.\n */\n copySelectedMedia(): void {\n const currentState = this.state();\n const selectedItemId = currentState.selectedItemId;\n\n if (!selectedItemId) {\n return;\n }\n\n // Find the selected item and its track\n let selectedItem: MediaItem | null = null;\n let selectedTrackId: string | null = null;\n\n for (const track of currentState.tracks) {\n const item = track.items.find(i => i.id === selectedItemId);\n if (item) {\n selectedItem = item;\n selectedTrackId = track.id;\n break;\n }\n }\n\n if (!selectedItem || !selectedTrackId) {\n return;\n }\n\n // Store a copy of the item in clipboard\n this.clipboardItem.set({ ...selectedItem });\n this.clipboardSourceTrackId.set(selectedTrackId);\n\n this.notificationsComponent?.showNotification(\n 'Media copied to clipboard.',\n 'success'\n );\n }\n\n /**\n * Paste the clipboard media item at the playhead position.\n * Pastes on the same track where the item was copied from.\n * If there's no space at playhead position, finds the next available slot.\n */\n pasteMedia(): void {\n const copiedItem = this.clipboardItem();\n const sourceTrackId = this.clipboardSourceTrackId();\n\n if (!copiedItem || !sourceTrackId) {\n return;\n }\n\n const currentState = this.state();\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n\n // Find the source track\n let targetTrack = currentState.tracks.find(t => t.id === sourceTrackId);\n\n // If source track no longer exists, use the first track\n if (!targetTrack) {\n targetTrack = currentState.tracks[0];\n if (!targetTrack) {\n this.notificationsComponent?.showNotification(\n 'No tracks available to paste media.',\n 'error'\n );\n return;\n }\n }\n\n const itemDuration = copiedItem.duration;\n\n // Try to find a valid position starting from playhead\n const pastePosition = this.findPastePosition(\n playheadTime,\n itemDuration,\n targetTrack.items,\n totalDuration\n );\n\n if (pastePosition === null) {\n this.notificationsComponent?.showNotification(\n 'No space available to paste media on this track.',\n 'warning'\n );\n return;\n }\n\n // Create a new item with a new ID\n const newItem: MediaItem = {\n ...copiedItem,\n id: `item-${Date.now()}`,\n startTime: pastePosition,\n trackId: targetTrack.id\n };\n\n // Add the new item to the track\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === targetTrack!.id\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n this.notificationsComponent?.showNotification(\n 'Media pasted successfully.',\n 'success'\n );\n }\n\n /**\n * Find a valid position to paste media item.\n * First tries at the playhead position, then finds the next available gap.\n */\n private findPastePosition(\n preferredPosition: number,\n duration: number,\n existingItems: MediaItem[],\n totalDuration: number\n ): number | null {\n // Check if we can fit at the preferred position (playhead)\n if (this.canFitAtPosition(preferredPosition, duration, existingItems, totalDuration)) {\n return preferredPosition;\n }\n\n // Sort existing items by start time\n const sortedItems = [...existingItems].sort((a, b) => a.startTime - b.startTime);\n\n // Find all gaps on the track and try to place the item\n const gaps = this.dragDropService.findAllGaps(sortedItems);\n\n // First, try to find a gap that starts at or after the playhead\n for (const gap of gaps) {\n // Calculate actual gap size (considering totalDuration for infinite gaps)\n const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n const gapSize = effectiveGapEnd - gap.gapStart;\n\n if (gap.gapStart >= preferredPosition && gapSize >= duration) {\n return gap.gapStart;\n }\n }\n\n // If no gap after playhead, try any gap that can fit the item\n for (const gap of gaps) {\n // Calculate actual gap size (considering totalDuration for infinite gaps)\n const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n const gapSize = effectiveGapEnd - gap.gapStart;\n\n if (gapSize >= duration) {\n return gap.gapStart;\n }\n }\n\n // No suitable position found\n return null;\n }\n\n /**\n * Check if an item can fit at a specific position without overlapping.\n */\n private canFitAtPosition(\n position: number,\n duration: number,\n existingItems: MediaItem[],\n totalDuration: number\n ): boolean {\n // Check bounds\n if (position < 0 || position + duration > totalDuration) {\n return false;\n }\n\n // Check for overlaps with existing items\n const endPosition = position + duration;\n for (const item of existingItems) {\n const itemEnd = item.startTime + item.duration;\n // Check if there's an overlap\n if (position < itemEnd && endPosition > item.startTime) {\n return false;\n }\n }\n\n return true;\n }\n}\n",
"structuredPatch": [
{
"oldStart": 870,
"oldLines": 8,
"newStart": 870,
"newLines": 75,
"lines": [
" 'New project created. Timeline cleared.',",
" 'success'",
" );",
"+",
"+ // Clear undo/redo history when creating a new project",
"+ this.historyService.clearHistory();",
" }",
" ",
"+ /**",
"+ * Push current state to history before making a change.",
"+ * Should be called at the start of any operation that modifies the timeline.",
"+ */",
"+ private saveStateToHistory(): void {",
"+ this.historyService.pushState(this.state());",
"+ }",
"+",
"+ /**",
"+ * Undo the last action.",
"+ * Restores the previous timeline state.",
"+ */",
"+ undo(): void {",
"+ const previousState = this.historyService.undo(this.state());",
"+ if (previousState) {",
"+ this.state.set(previousState);",
"+",
"+ // Sync playback service with new state",
"+ this.playbackService.seek(previousState.tracks, previousState.playheadPosition);",
"+",
"+ this.notificationsComponent?.showNotification('Undo successful.', 'info');",
"+ }",
"+ }",
"+",
"+ /**",
"+ * Redo the last undone action.",
"+ * Restores the next timeline state.",
"+ */",
"+ redo(): void {",
"+ const nextState = this.historyService.redo(this.state());",
"+ if (nextState) {",
"+ this.state.set(nextState);",
"+",
"+ // Sync playback service with new state",
"+ this.playbackService.seek(nextState.tracks, nextState.playheadPosition);",
"+",
"+ this.notificationsComponent?.showNotification('Redo successful.', 'info');",
"+ }",
"+ }",
"+",
"+ /**",
"+ * Handle keyboard shortcuts for undo/redo.",
"+ */",
"+ @HostListener('document:keydown', ['$event'])",
"+ handleKeyboardShortcuts(event: KeyboardEvent): void {",
"+ // Skip if user is typing in an input field",
"+ const target = event.target as HTMLElement;",
"+ if (target.tagName === 'INPUT' || target.tagName === 'TEXTAREA') {",
"+ return;",
"+ }",
"+",
"+ // Ctrl+Z or Cmd+Z for undo",
"+ if ((event.ctrlKey || event.metaKey) && event.key === 'z' && !event.shiftKey) {",
"+ event.preventDefault();",
"+ this.undo();",
"+ }",
"+",
"+ // Ctrl+Y or Cmd+Shift+Z for redo",
"+ if ((event.ctrlKey || event.metaKey) && (event.key === 'y' || (event.key === 'z' && event.shiftKey))) {",
"+ event.preventDefault();",
"+ this.redo();",
"+ }",
"+ }",
"+",
" // Video preview controls",
" togglePlayback(): void {",
" const currentState = this.state();"
]
}
],
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[2025-12-22T21:48:29.230Z] [INFO] {
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{
"type": "text",
"text": "Now I need to add `saveStateToHistory()` calls before each timeline-modifying operation. Let me identify all the methods that modify the state:\n\n1. `addTrack()` - line ~193\n2. `removeTrack()` - line ~214\n3. `zoomIn()` - line ~237\n4. `zoomOut()` - line ~244\n5. `onTrackPointerMove()` (during drag) - line ~330\n6. `handleResize()` - line ~418\n7. `addMediaItem()` - line ~724\n8. `removeMediaItem()` - line ~797\n9. `trimSelectedMedia()` - line ~1032\n10. `pasteMedia()` - line ~1173\n11. `saveDuration()` - line ~928\n12. `onMediaSelected()` - line ~950\n\nThe issue is that some operations like drag and resize are continuous, so we don't want to push state on every mouse move. Instead, we should push the state only at the START of these operations (on pointer down) and only create one history entry per operation.\n\nLet me add the history calls strategically. First, let me update the discrete operations:"
}
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[2025-12-22T21:48:32.361Z] [INFO] {
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"file_path": "/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts",
"old_string": " // Track management\n addTrack(): void {\n const currentState = this.state();\n const newTrack: Track = {\n id: `track-${Date.now()}`,\n name: `Track ${currentState.tracks.length + 1}`,\n order: currentState.tracks.length,\n items: []\n };\n\n this.state.update(s => ({\n ...s,\n tracks: [...s.tracks, newTrack]\n }));",
"new_string": " // Track management\n addTrack(): void {\n // Save state before modification for undo\n this.saveStateToHistory();\n\n const currentState = this.state();\n const newTrack: Track = {\n id: `track-${Date.now()}`,\n name: `Track ${currentState.tracks.length + 1}`,\n order: currentState.tracks.length,\n items: []\n };\n\n this.state.update(s => ({\n ...s,\n tracks: [...s.tracks, newTrack]\n }));"
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[2025-12-22T21:48:32.454Z] [INFO] {
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"content": "The file /tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts has been updated. Here's the result of running `cat -n` on a snippet of the edited file:\n 194→ };\n 195→ this.renderLoopId = requestAnimationFrame(render);\n 196→ }\n 197→\n 198→ // Track management\n 199→ addTrack(): void {\n 200→ // Save state before modification for undo\n 201→ this.saveStateToHistory();\n 202→\n 203→ const currentState = this.state();\n 204→ const newTrack: Track = {\n 205→ id: `track-${Date.now()}`,\n 206→ name: `Track ${currentState.tracks.length + 1}`,\n 207→ order: currentState.tracks.length,\n 208→ items: []\n 209→ };\n 210→\n 211→ this.state.update(s => ({\n 212→ ...s,\n 213→ tracks: [...s.tracks, newTrack]\n 214→ }));\n 215→\n 216→ // Show notification for adding track\n 217→ this.notificationsComponent?.showNotification(\n 218→ `Track \"${newTrack.name}\" added.`,"
}
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"filePath": "/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts",
"oldString": " // Track management\n addTrack(): void {\n const currentState = this.state();\n const newTrack: Track = {\n id: `track-${Date.now()}`,\n name: `Track ${currentState.tracks.length + 1}`,\n order: currentState.tracks.length,\n items: []\n };\n\n this.state.update(s => ({\n ...s,\n tracks: [...s.tracks, newTrack]\n }));",
"newString": " // Track management\n addTrack(): void {\n // Save state before modification for undo\n this.saveStateToHistory();\n\n const currentState = this.state();\n const newTrack: Track = {\n id: `track-${Date.now()}`,\n name: `Track ${currentState.tracks.length + 1}`,\n order: currentState.tracks.length,\n items: []\n };\n\n this.state.update(s => ({\n ...s,\n tracks: [...s.tracks, newTrack]\n }));",
"originalFile": "import { Component, signal, computed, ViewChild, ElementRef, AfterViewInit, OnDestroy, effect, HostListener } from '@angular/core';\nimport { CommonModule } from '@angular/common';\nimport { MediaType, MediaItem, Track, TimelineState } from '../../models/timeline.models';\nimport { MediaLibraryComponent, MediaLibraryItem } from '../media-library/media-library.component';\nimport { Media***********onent } from '../media-toolbar/media-toolbar.component';\nimport { Notif************onent } from '../notifications/notifications.component';\nimport { Timel*************rvice } from '../../services/timeline-drag-drop.service';\nimport { PlaybackService } from '../../services/playback.service';\nimport { Timel************rvice } from '../../services/timeline-storage.service';\nimport { Timel************rvice } from '../../services/timeline-history.service';\n\n@Component({\n selector: 'app-timeline',\n standalone: true,\n imports: [CommonModule, MediaLibraryComponent, MediaToolbarComponent, NotificationsComponent],\n templateUrl: './timeline.component.html',\n styleUrl: './timeline.component.css'\n})\nexport class TimelineComponent implements AfterViewInit, OnDestroy {\n // Zoom levels: pixels per second\n private readonly MIN_ZOOM = 10;\n private readonly MAX_ZOOM = 200;\n private readonly ZOOM_STEP = 20;\n readonly TRACK_HEADER_WIDTH = 150; // Width of track header in pixels\n private readonly SNAP_PROXIMITY_MS = 500; // Snap to item if playhead is within 500ms\n private readonly MIN_ITEM_DURATION = 100; // Minimum item duration in milliseconds\n\n // Canvas dimensions for preview\n readonly PREVIEW_WIDTH = 640;\n readonly PREVIEW_HEIGHT = 360;\n\n // View references\n @ViewChild('timelineRuler') timelineRuler?: ElementRef<HTMLElement>;\n @ViewChild('notifications') notificationsComponent?: NotificationsComponent;\n @ViewChild('previewCanvas') previewCanvas?: ElementRef<HTMLCanvasElement>;\n\n // Timeline state\n readonly state = signal<TimelineState>({\n tracks: [\n { id: '1', name: 'Track 1', order: 0, items: [] },\n { id: '2', name: 'Track 2', order: 1, items: [] }\n ],\n playheadPosition: 0,\n zoomLevel: 50, // pixels per second\n totalDuration: 120000, // 120 seconds in milliseconds\n selectedItemId: null\n });\n\n // Computed values\n readonly pixel**********econd = computed(() => {\n return this.state().zoomLevel / 1000;\n });\n\n readonly timelineWidth = computed(() => {\n const state = this.state();\n // Calculate the maximum end time across all tracks\n let maxEndTime = state.totalDuration;\n\n for (const track of state.tracks) {\n for (const item of track.items) {\n const itemEndTime = item.startTime + item.duration;\n if (itemEndTime > maxEndTime) {\n maxEndTime = itemEndTime;\n }\n }\n }\n\n return maxEndTime * this.pixelsPerMillisecond();\n });\n\n readonly timelineLineHeight = computed(() => {\n const state = this.state();\n return state.tracks.length * 60 + 32;\n });\n\n readonly playheadPosition = computed(() => {\n return this.state().playheadPosition * this.pixelsPerMillisecond();\n });\n\n readonly playh************ition = computed(() => {\n return this.playheadPosition() + this.TRACK_HEADER_WIDTH;\n });\n\n // Computed: whether a media item is currently selected\n readonly hasSelectedItem = computed(() => {\n return this.state().selectedItemId !== null;\n });\n\n // Dragging state\n private draggedItem: MediaItem | null = null;\n private draggedItemOriginalTrackId: string | null = null;\n private dragOffsetTime: number = 0; // Offset in milliseconds from item start to cursor position\n private isDraggingPlayhead = false;\n private isDraggingFromRuler = false;\n private resizingItem: { item: MediaItem; edge: 'left' | 'right' } | null = null;\n private mouseDownPosition: { x: number; y: number } | null = null; // Track mouse down position for click detection\n\n // Video preview state\n readonly isPlaying = signal<boolean>(false);\n\n // Duration editor state\n readonly showDurationEditor = signal<boolean>(false);\n private editedDuration: number = 120; // Duration in seconds\n\n // Media library state\n readonly showMediaLibrary = signal<boolean>(false);\n private mediaLibraryTargetTrackId: string | null = null;\n\n // Clipboard state for copy/paste functionality\n private readonly clipboardItem = signal<MediaItem | null>(null);\n private readonly clipb************ackId = signal<string | null>(null);\n\n // Computed: whether a media item is in clipboard\n readonly hasClipboardItem = computed(() => {\n return this.clipboardItem() !== null;\n });\n\n // Computed: whether undo/redo is available\n readonly canUndo = computed(() => this.historyService.canUndo());\n readonly canRedo = computed(() => this.historyService.canRedo());\n\n // Render loop ID for cleanup\n private renderLoopId: number | null = null;\n\n constructor(\n private dragDropService: TimelineDragDropService,\n public playbackService: PlaybackService,\n private storageService: TimelineStorageService,\n private historyService: TimelineHistoryService\n ) {\n // Load saved state from LocalStorage on initialization\n const savedState = this.storageService.loadState();\n if (savedState) {\n this.state.set(savedState);\n }\n\n // Effect to sync playhead position from PlaybackService during playback\n effect(() => {\n if (this.playbackService.isPlaying()) {\n const position = this.playbackService.playheadPosition();\n this.state.update(s => ({\n ...s,\n playheadPosition: position\n }));\n }\n });\n\n // Effect to auto-save timeline state to LocalStorage on any change\n effect(() => {\n const currentState = this.state();\n this.storageService.saveState(currentState);\n });\n }\n\n ngAfterViewInit(): void {\n // Initialize canvas for preview rendering\n if (this.previewCanvas) {\n this.playbackService.setCanvas(this.previewCanvas.nativeElement);\n }\n\n // Start continuous render loop for preview (renders current frame even when paused)\n this.startRenderLoop();\n\n // Synchronize media and render initial frame if state was loaded from LocalStorage\n const currentState = this.state();\n if (currentState.tracks.length > 0) {\n this.playbackService.seek(currentState.tracks, currentState.playheadPosition);\n }\n }\n\n ngOnDestroy(): void {\n // Clean up render loop\n if (this.renderLoopId !== null) {\n cancelAnimationFrame(this.renderLoopId);\n this.renderLoopId = null;\n }\n\n // Stop playback\n this.playbackService.stop();\n }\n\n /**\n * Continuous render loop for preview canvas.\n * Keeps rendering even when paused so seeking updates the preview.\n */\n private startRenderLoop(): void {\n const render = () => {\n // Only render if we have active media and are not playing\n // (PlaybackService handles rendering during playback)\n if (!this.playbackService.isPlaying()) {\n this.playbackService.renderCurrentFrame();\n }\n this.renderLoopId = requestAnimationFrame(render);\n };\n this.renderLoopId = requestAnimationFrame(render);\n }\n\n // Track management\n addTrack(): void {\n const currentState = this.state();\n const newTrack: Track = {\n id: `track-${Date.now()}`,\n name: `Track ${currentState.tracks.length + 1}`,\n order: currentState.tracks.length,\n items: []\n };\n\n this.state.update(s => ({\n ...s,\n tracks: [...s.tracks, newTrack]\n }));\n\n // Show notification for adding track\n this.notificationsComponent?.showNotification(\n `Track \"${newTrack.name}\" added.`,\n 'success'\n );\n }\n\n removeTrack(trackId: string): void {\n const currentState = this.state();\n if (currentState.tracks.length <= 1) {\n return; // Keep at least one track\n }\n\n // Get track name before removing\n const trackToRemove = currentState.tracks.find(t => t.id === trackId);\n const trackName = trackToRemove?.name || 'Track';\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.filter(t => t.id !== trackId)\n }));\n\n // Show notification for removing track\n this.notificationsComponent?.showNotification(\n `Track \"${trackName}\" removed.`,\n 'info'\n );\n }\n\n // Zoom controls\n zoomIn(): void {\n this.state.update(s => ({\n ...s,\n zoomLevel: Math.min(s.zoomLevel + this.ZOOM_STEP, this.MAX_ZOOM)\n }));\n }\n\n zoomOut(): void {\n this.state.update(s => ({\n ...s,\n zoomLevel: Math.max(s.zoomLevel - this.ZOOM_STEP, this.MIN_ZOOM)\n }));\n }\n\n // Utility method to extract coordinates from mouse or touch events\n private getEventCoordinates(event: MouseEvent | TouchEvent): { clientX: number; clientY: number } {\n if (event instanceof MouseEvent) {\n return { clientX: event.clientX, clientY: event.clientY };\n } else {\n const touch = event.touches[0] || event.changedTouches[0];\n return { clientX: touch.clientX, clientY: touch.clientY };\n }\n }\n\n // Playhead controls\n onRulerPointerDown(event: MouseEvent | TouchEvent): void {\n event.preventDefault();\n this.isDraggingFromRuler = true;\n\n // Immediately update position on pointer down\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n const coords = this.getEventCoordinates(event);\n // Calculate position within the ruler element\n // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n const x = coords.clientX - rect.left;\n const newPosition = x / this.pixelsPerMillisecond();\n const currentState = this.state();\n const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n\n this.state.update(s => ({\n ...s,\n playheadPosition: clampedPosition\n }));\n\n // Sync position to playback service for seeking\n this.playbackService.seek(currentState.tracks, clampedPosition);\n }\n\n onPlayheadPointerDown(event: MouseEvent | TouchEvent): void {\n event.preventDefault();\n event.stopPropagation();\n this.isDraggingPlayhead = true;\n }\n\n\n // Media item drag and drop\n onMediaItemPointerDown(event: MouseEvent | TouchEvent, item: MediaItem, track: Track): void {\n const target = event.target as HTMLElement;\n\n // Check if clicking/touching on resize handle\n if (target.classList.contains('resize-handle')) {\n this.resizingItem = {\n item,\n edge: target.classList.contains('resize-handle-left') ? 'left' : 'right'\n };\n event.preventDefault();\n return;\n }\n\n const coords = this.getEventCoordinates(event);\n this.mouseDownPosition = { x: coords.clientX, y: coords.clientY };\n\n const mediaItemElement = event.currentTarget as HTMLElement;\n const rect = mediaItemElement.getBoundingClientRect();\n const clickX = coords.clientX - rect.left;\n\n // Convert pixel offset to time offset\n this.dragOffsetTime = clickX / this.pixelsPerMillisecond();\n\n this.draggedItem = item;\n this.draggedItemOriginalTrackId = track.id;\n event.preventDefault();\n }\n\n onTrackPointerDown(event: MouseEvent | TouchEvent): void {\n // Deselect when clicking/touching track background (not on media item)\n const target = event.target as HTMLElement;\n if (target.classList.contains('track')) {\n this.deselectMediaItem();\n }\n }\n\n onTrackPointerMove(event: MouseEvent | TouchEvent, track: Track): void {\n if (this.resizingItem) {\n this.handleResize(event, track);\n return;\n }\n event.preventDefault();\n event.stopPropagation();\n\n if (!this.draggedItem) return;\n\n const coords = this.getEventCoordinates(event);\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n const x = coords.clientX - rect.left;\n const requestedStartTime = Math.max(0, x / this.pixelsPerMillisecond() - this.dragOffsetTime);\n\n this.state.update(s => {\n const updatedTracks = s.tracks.map(t => {\n if (t.id === track.id) {\n // Get all items except the dragged one for collision detection\n const otherItems = t.items.filter(i => i.id !== this.draggedItem!.id);\n\n // Fix for issue #81: Find snap targets (playhead and items on all tracks)\n const snapTargets = this.dragDropService.findSnapTargets(\n this.draggedItem!.id,\n s.tracks,\n s.playheadPosition\n );\n\n // Calculate valid position and duration considering collisions, gap fitting, and snapping\n const validPosition = this.dragDropService.getValidDragPosition(\n this.draggedItem!,\n requestedStartTime,\n otherItems,\n s.totalDuration,\n snapTargets\n );\n\n // Check if item already exists in this track\n const itemExists = t.items.some(i => i.id === this.draggedItem!.id);\n\n if (itemExists) {\n // Update position and duration in current track\n return {\n ...t,\n items: t.items.map(i =>\n i.id === this.draggedItem!.id\n ? {\n ...i,\n startTime: validPosition.startTime,\n duration: validPosition.duration,\n trackId: track.id\n }\n : i\n )\n };\n } else {\n // Add to new track with adjusted position and duration\n return {\n ...t,\n items: [\n ...otherItems,\n {\n ...this.draggedItem!,\n startTime: validPosition.startTime,\n duration: validPosition.duration,\n trackId: track.id\n }\n ]\n };\n }\n } else if (t.id === this.draggedItemOriginalTrackId && t.id !== track.id) {\n // Remove from original track only if moving to different track\n return {\n ...t,\n items: t.items.filter(i => i.id !== this.draggedItem!.id)\n };\n }\n return t;\n });\n\n // Update the original track ID to current track for smooth dragging within same track\n this.draggedItemOriginalTrackId = track.id;\n\n return { ...s, tracks: updatedTracks };\n });\n }\n\n private handleResize(event: MouseEvent | TouchEvent, track: Track): void {\n if (!this.resizingItem) return;\n\n const coords = this.getEventCoordinates(event);\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n // Fix for issue #83: getBoundingClientRect() returns viewport-relative coordinates,\n // and coords.clientX is also viewport-relative, so we don't need to add scrollLeft\n const x = coords.clientX - rect.left;\n const timeAtCursor = x / this.pixelsPerMillisecond();\n\n this.state.update(s => {\n // Fix for issue #87: Find snap targets for resize operations\n const snapTargets = this.dragDropService.findSnapTargets(\n this.resizingItem!.item.id,\n s.tracks,\n s.playheadPosition\n );\n\n const updatedTracks = s.tracks.map(t => {\n if (t.id === track.id) {\n // Get resize bounds considering adjacent items\n const bounds = this.dragDropService.getResizeBounds(\n this.resizingItem!.item,\n t.items,\n this.resizingItem!.edge,\n s.totalDuration\n );\n\n return {\n ...t,\n items: t.items.map(i => {\n if (i.id === this.resizingItem!.item.id) {\n if (this.resizingItem!.edge === 'left') {\n // Fix for issue #89: Handle mediaStartTime when resizing from left\n // Apply snapping to left edge (start time)\n let newStartTime = Math.max(\n bounds.minTime,\n Math.min(timeAtCursor, bounds.maxTime)\n );\n\n // Apply snapping if within snap distance\n let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n for (const target of snapTargets) {\n const distance = Math.abs(newStartTime - target);\n if (distance < minDistance) {\n minDistance = distance;\n // Only snap if within bounds\n if (target >= bounds.minTime && target <= bounds.maxTime) {\n newStartTime = target;\n }\n }\n }\n\n // Calculate how much the timeline position is changing\n const deltaTime = newStartTime - i.startTime;\n const newDuration = i.duration - deltaTime;\n\n // Update media start time (trimming from source media)\n const curre***********tTime = i.mediaStartTime || 0;\n const newMediaStartTime = curre***********tTime + deltaTime;\n\n // Check if we're trying to extend beyond the start of source media\n if (newMediaStartTime < 0) {\n // Can only extend left by curre***********tTime amount\n const maxExtension = currentMediaStartTime;\n const finalStartTime = i.startTime - maxExtension;\n const finalDuration = i.duration + maxExtension;\n\n // Ensure we don't exceed maxDuration\n if (i.maxDuration && finalDuration > i.maxDuration) {\n return {\n ...i,\n startTime: finalStartTime + (finalDuration - i.maxDuration),\n duration: i.maxDuration,\n mediaStartTime: 0\n };\n }\n\n return {\n ...i,\n startTime: finalStartTime,\n duration: finalDuration,\n mediaStartTime: 0\n };\n }\n\n // Ensure media end doesn't exceed maxDuration\n if (i.maxDuration && newMediaStartTime + newDuration > i.maxDuration) {\n const maxAllowedDuration = i.maxDuration - newMediaStartTime;\n return {\n ...i,\n startTime: i.startTime + (i.duration - maxAllowedDuration),\n duration: maxAllowedDuration,\n mediaStartTime: newMediaStartTime\n };\n }\n\n return {\n ...i,\n startTime: newStartTime,\n duration: newDuration,\n mediaStartTime: newMediaStartTime\n };\n } else {\n // Fix for issue #87: Apply snapping to right edge (end time)\n let newEndTime = Math.max(\n bounds.minTime,\n Math.min(timeAtCursor, bounds.maxTime)\n );\n\n // Apply snapping if within snap distance\n let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n for (const target of snapTargets) {\n const distance = Math.abs(newEndTime - target);\n if (distance < minDistance) {\n minDistance = distance;\n // Only snap if within bounds\n if (target >= bounds.minTime && target <= bounds.maxTime) {\n newEndTime = target;\n }\n }\n }\n\n const newDuration = newEndTime - i.startTime;\n\n // Limit duration by maxDuration if specified\n const limitedDuration = i.maxDuration\n ? Math.min(newDuration, i.maxDuration)\n : newDuration;\n\n return { ...i, duration: limitedDuration };\n }\n }\n return i;\n })\n };\n }\n return t;\n });\n\n return { ...s, tracks: updatedTracks };\n });\n }\n\n onPointerUp(event: MouseEvent | TouchEvent): void {\n // Detect if this was a click/tap (not a drag) on a media item\n if (this.draggedItem && this.mouseDownPosition) {\n const coords = this.getEventCoordinates(event);\n const dx = coords.clientX - this.mouseDownPosition.x;\n const dy = coords.clientY - this.mouseDownPosition.y;\n const distance = Math.sqrt(dx * dx + dy * dy);\n\n // If pointer moved less than 5 pixels, consider it a click/tap\n if (distance < 5) {\n this.selectMediaItem(this.draggedItem.id);\n }\n }\n\n this.draggedItem = null;\n this.draggedItemOriginalTrackId = null;\n this.dragOffsetTime = 0;\n this.isDraggingPlayhead = false;\n this.isDraggingFromRuler = false;\n this.resizingItem = null;\n this.mouseDownPosition = null;\n }\n\n onDocumentPointerMove(event: MouseEvent | TouchEvent): void {\n if (this.isDraggingPlayhead || this.isDraggingFromRuler) {\n // Fix for issue #50: Use ViewChild reference to ensure we use the exact same element as onRulerPointerDown\n if (!this.timelineRuler) {\n return;\n }\n\n const coords = this.getEventCoordinates(event);\n const rulerElement = this.timelineRuler.nativeElement;\n // Use the same calculation as onRulerPointerDown\n // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n const rect = rulerElement.getBoundingClientRect();\n const x = coords.clientX - rect.left;\n const newPosition = x / this.pixelsPerMillisecond();\n const currentState = this.state();\n const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n\n this.state.update(s => ({\n ...s,\n playheadPosition: clampedPosition\n }));\n\n // Sync position to playback service for seeking (but don't call too frequently during drag)\n this.playbackService.seek(currentState.tracks, clampedPosition);\n }\n\n // Fix for issue #96: Handle media item dragging and resizing at document level for touch events\n // This allows dragging between tracks on mobile devices\n if (event instanceof TouchEvent) {\n if (this.draggedItem) {\n // Find which track the touch is currently over\n const targetTrack = this.findTrackAtCoordinates(this.getEventCoordinates(event));\n if (targetTrack) {\n // Reuse existing drag logic\n this.onTrackPointerMove(event, targetTrack);\n }\n } else if (this.resizingItem) {\n // Find the track that contains the resizing item\n const targetTrack = this.findTrackContainingItem(this.resizingItem.item.id);\n if (targetTrack) {\n // Reuse existing resize logic\n this.handleResize(event, targetTrack);\n }\n }\n }\n }\n\n // Helper method to find which track is at the given Y coordinate\n private findTrackAtCoordinates(coords: { clientX: number; clientY: number }): Track | null {\n const trackElements = document.querySelectorAll('.track');\n for (const trackElement of Array.from(trackElements)) {\n const rect = trackElement.getBoundingClientRect();\n if (coords.clientY >= rect.top && coords.clientY <= rect.bottom) {\n const trackIndex = Array.from(trackElements).indexOf(trackElement);\n const tracks = this.state().tracks;\n if (trackIndex >= 0 && trackIndex < tracks.length) {\n return tracks[trackIndex];\n }\n }\n }\n return null;\n }\n\n // Helper method to find the track containing a specific item\n private findTrackContainingItem(itemId: string): Track | null {\n const currentState = this.state();\n for (const track of currentState.tracks) {\n if (track.items.some(item => item.id === itemId)) {\n return track;\n }\n }\n return null;\n }\n\n // Helper methods\n getItemStyle(item: MediaItem) {\n return {\n left: `${item.startTime * this.pixelsPerMillisecond()}px`,\n width: `${item.duration * this.pixelsPerMillisecond()}px`\n };\n }\n\n getMediaTypeClass(type: MediaType): string {\n return `media-${type}`;\n }\n\n formatTime(milliseconds: number): string {\n const seconds = Math.floor(milliseconds / 1000);\n const minutes = Math.floor(seconds / 60);\n const remainingSeconds = seconds % 60;\n const cs = Math.floor((milliseconds % 1000) / 10);\n return `${minutes}:${remainingSeconds.toString().padStart(2, '0')}.${cs.toString().padStart(2, '0')}`;\n }\n\n /**\n * Calculate appropriate time interval for markers based on zoom level\n * to prevent marker labels from overlapping\n */\n private getMarkerInterval(): number {\n // Minimum spacing between markers in pixels to prevent overlap\n // Enough space for \"0:00.000\" text (about 50-60px)\n const MIN_M***********NG_PX = 60;\n\n // Calculate how much time represents MIN_M***********NG_PX at current zoom\n const pixelsPerMs = this.pixelsPerMillisecond();\n const minTimeSpacing = MIN_M***********NG_PX / pixelsPerMs;\n\n // Define possible intervals (in ms): 100ms, 250ms, 500ms, 1s, 2s, 5s, 10s, 30s, 60s\n const intervals = [100, 250, 500, 1000, 2000, 5000, 10000, 30000, 60000];\n\n // Find the smallest interval that's larger than or equal to minTimeSpacing\n for (const interval of intervals) {\n if (interval >= minTimeSpacing) {\n return interval;\n }\n }\n\n // If even 60s is too small, use larger intervals\n return Math.ceil(minTimeSpacing / 60000) * 60000;\n }\n\n getTimeMarkers(): { position: number; label: string }[] {\n const markers: { position: number; label: string }[] = [];\n const stepMs = this.getMarkerInterval(); // Dynamic interval based on zoom level\n\n // Fix for issue #85: Do not show the last time mark at totalDuration\n // to prevent container expansion from the text label\n for (let time = 0; time < this.state().totalDuration; time += stepMs) {\n markers.push({\n position: time * this.pixelsPerMillisecond(),\n label: this.formatTime(time)\n });\n }\n\n return markers;\n }\n\n // Add placeholder media item\n addMediaItem(type: MediaType, trackId: string): void {\n const currentState = this.state();\n const track = currentState.tracks.find(t => t.id === trackId);\n\n if (!track) return;\n\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n const newItemDuration = type === MediaType.IMAGE ? 5000 : 3000;\n\n // Determine the start time for the new item using the service\n const startTime = this.dragDropService.calculateNewItemStartTime(\n playheadTime,\n track.items,\n this.SNAP_PROXIMITY_MS\n );\n\n // Fix for issue #48: Ensure new item doesn't exceed totalDuration\n const maxAllowedDuration = totalDuration - startTime;\n const finalDuration = Math.min(newItemDuration, maxAllowedDuration);\n\n // Fix for issue #64: Verify that the new item doesn't overlap with any existing items\n const testItem: MediaItem = {\n id: 'temp',\n type,\n startTime,\n duration: finalDuration,\n trackId,\n name: '',\n isPlaceholder: true\n };\n\n // Validate and adjust position if needed\n const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n\n // Recalculate duration limit if position was adjusted\n const adjus****************ation = totalDuration - validatedStartTime;\n const adjustedDuration = Math.min(newItemDuration, adjustedMaxAllowedDuration);\n\n // Create the final non-overlapping item\n const newItem: MediaItem = {\n id: `item-${Date.now()}`,\n type,\n startTime: validatedStartTime,\n duration: adjustedDuration,\n trackId,\n name: `${type} placeholder`,\n isPlaceholder: true\n };\n\n // Set maxDuration for audio and video placeholders\n if (type === MediaType.VIDEO) {\n newItem.maxDuration = Math.min(10000, adjustedMaxAllowedDuration); // 10 seconds default for video\n } else if (type === MediaType.AUDIO) {\n newItem.maxDuration = Math.min(15000, adjustedMaxAllowedDuration); // 15 seconds default for audio\n }\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === trackId\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n // Show notification for adding media\n this.notificationsComponent?.showNotification(\n 'Media added to timeline.',\n 'success'\n );\n }\n\n removeMediaItem(itemId: string, trackId: string): void {\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === trackId\n ? { ...t, items: t.items.filter(i => i.id !== itemId) }\n : t\n ),\n // Deselect if removing selected item\n selectedItemId: s.selectedItemId === itemId ? null : s.selectedItemId\n }));\n\n // Show notification for removing media\n this.notificationsComponent?.showNotification(\n 'Media removed from timeline.',\n 'info'\n );\n }\n\n // Media selection\n selectMediaItem(itemId: string): void {\n this.state.update(s => ({\n ...s,\n selectedItemId: itemId\n }));\n }\n\n deselectMediaItem(): void {\n this.state.update(s => ({\n ...s,\n selectedItemId: null\n }));\n }\n\n isItemSelected(itemId: string): boolean {\n return this.state().selectedItemId === itemId;\n }\n\n readonly MediaType = MediaType;\n\n /**\n * Create a new project by clearing the timeline and LocalStorage\n */\n newProject(): void {\n // Stop playback if playing\n if (this.playbackService.isPlaying()) {\n this.playbackService.stop();\n this.isPlaying.set(false);\n }\n\n // Reset timeline state to initial values\n this.state.set({\n tracks: [\n { id: '1', name: 'Track 1', order: 0, items: [] },\n { id: '2', name: 'Track 2', order: 1, items: [] }\n ],\n playheadPosition: 0,\n zoomLevel: 50,\n totalDuration: 120000,\n selectedItemId: null\n });\n\n // Clear LocalStorage\n this.storageService.clearState();\n\n // Show notification\n this.notificationsComponent?.showNotification(\n 'New project created. Timeline cleared.',\n 'success'\n );\n\n // Clear undo/redo history when creating a new project\n this.historyService.clearHistory();\n }\n\n /**\n * Push current state to history before making a change.\n * Should be called at the start of any operation that modifies the timeline.\n */\n private saveStateToHistory(): void {\n this.historyService.pushState(this.state());\n }\n\n /**\n * Undo the last action.\n * Restores the previous timeline state.\n */\n undo(): void {\n const previousState = this.historyService.undo(this.state());\n if (previousState) {\n this.state.set(previousState);\n\n // Sync playback service with new state\n this.playbackService.seek(previousState.tracks, previousState.playheadPosition);\n\n this.notificationsComponent?.showNotification('Undo successful.', 'info');\n }\n }\n\n /**\n * Redo the last undone action.\n * Restores the next timeline state.\n */\n redo(): void {\n const nextState = this.historyService.redo(this.state());\n if (nextState) {\n this.state.set(nextState);\n\n // Sync playback service with new state\n this.playbackService.seek(nextState.tracks, nextState.playheadPosition);\n\n this.notificationsComponent?.showNotification('Redo successful.', 'info');\n }\n }\n\n /**\n * Handle keyboard shortcuts for undo/redo.\n */\n @HostListener('document:keydown', ['$event'])\n handleKeyboardShortcuts(event: KeyboardEvent): void {\n // Skip if user is typing in an input field\n const target = event.target as HTMLElement;\n if (target.tagName === 'INPUT' || target.tagName === 'TEXTAREA') {\n return;\n }\n\n // Ctrl+Z or Cmd+Z for undo\n if ((event.ctrlKey || event.metaKey) && event.key === 'z' && !event.shiftKey) {\n event.preventDefault();\n this.undo();\n }\n\n // Ctrl+Y or Cmd+Shift+Z for redo\n if ((event.ctrlKey || event.metaKey) && (event.key === 'y' || (event.key === 'z' && event.shiftKey))) {\n event.preventDefault();\n this.redo();\n }\n }\n\n // Video preview controls\n togglePlayback(): void {\n const currentState = this.state();\n\n if (this.playbackService.isPlaying()) {\n this.playbackService.pause();\n this.isPlaying.set(false);\n } else {\n // Sync playhead position to PlaybackService before starting\n this.playbackService.setPlayheadPosition(currentState.playheadPosition);\n this.playbackService.play(currentState.tracks, currentState.totalDuration);\n this.isPlaying.set(true);\n }\n }\n\n skipBackward(): void {\n const currentState = this.state();\n const newPosition = Math.max(0, currentState.playheadPosition - 5000);\n\n this.state.update(s => ({\n ...s,\n playheadPosition: newPosition\n }));\n\n // Sync position and update media\n this.playbackService.seek(currentState.tracks, newPosition);\n }\n\n skipForward(): void {\n const currentState = this.state();\n const newPosition = Math.min(currentState.totalDuration, currentState.playheadPosition + 5000);\n\n this.state.update(s => ({\n ...s,\n playheadPosition: newPosition\n }));\n\n // Sync position and update media\n this.playbackService.seek(currentState.tracks, newPosition);\n }\n\n // Duration editor methods\n openDurationEditor(): void {\n this.editedDuration = this.state().totalDuration / 1000;\n this.showDurationEditor.set(true);\n }\n\n closeDurationEditor(): void {\n this.showDurationEditor.set(false);\n }\n\n onDurationInputChange(event: Event): void {\n const input = event.target as HTMLInputElement;\n const value = parseFloat(input.value);\n if (!isNaN(value) && value > 0) {\n this.editedDuration = value;\n }\n }\n\n saveDuration(): void {\n const newDurationMs = Math.max(1000, this.editedDuration * 1000); // At least 1 second\n this.state.update(s => ({\n ...s,\n totalDuration: newDurationMs,\n // Ensure playhead doesn't exceed new duration\n playheadPosition: Math.min(s.playheadPosition, newDurationMs)\n }));\n this.closeDurationEditor();\n }\n\n // Media library methods\n openMediaLibrary(trackId: string): void {\n this.mediaLibraryTargetTrackId = trackId;\n this.showMediaLibrary.set(true);\n }\n\n closeMediaLibrary(): void {\n this.showMediaLibrary.set(false);\n this.mediaLibraryTargetTrackId = null;\n }\n\n onMediaSelected(media: MediaLibraryItem): void {\n if (!this.mediaLibraryTargetTrackId) return;\n\n const currentState = this.state();\n const track = currentState.tracks.find(t => t.id === this.mediaLibraryTargetTrackId);\n\n if (!track) return;\n\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n\n // Determine the start time for the new item using the service\n const startTime = this.dragDropService.calculateNewItemStartTime(\n playheadTime,\n track.items,\n this.SNAP_PROXIMITY_MS\n );\n\n // Ensure item doesn't exceed totalDuration\n const maxAllowedDuration = totalDuration - startTime;\n const finalDuration = Math.min(media.duration, maxAllowedDuration);\n\n // Verify that the new item doesn't overlap with any existing items\n const testItem: MediaItem = {\n id: 'temp',\n type: media.type,\n startTime,\n duration: finalDuration,\n trackId: this.mediaLibraryTargetTrackId,\n name: '',\n isPlaceholder: false\n };\n\n // Validate and adjust position if needed\n const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n\n // Recalculate duration limit if position was adjusted\n const adjus****************ation = totalDuration - validatedStartTime;\n const adjustedDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n\n // Create the final non-overlapping item\n const newItem: MediaItem = {\n id: `item-${Date.now()}`,\n type: media.type,\n startTime: validatedStartTime,\n duration: adjustedDuration,\n trackId: this.mediaLibraryTargetTrackId,\n name: media.name,\n url: media.url, // Pass URL from media library for playback\n isPlaceholder: false\n };\n\n // Set maxDuration for audio and video\n if (media.type === MediaType.VIDEO) {\n newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n } else if (media.type === MediaType.AUDIO) {\n newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n }\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === this.mediaLibraryTargetTrackId\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n // Show notification for adding media\n this.notificationsComponent?.showNotification(\n `\"${media.name}\" added to timeline.`,\n 'success'\n );\n\n // Close the media library after selection\n this.closeMediaLibrary();\n }\n\n /**\n * Trim (split) the selected media item at the playhead position.\n * Creates two separate items from the original media.\n */\n trimSelectedMedia(): void {\n const currentState = this.state();\n const selectedItemId = currentState.selectedItemId;\n\n if (!selectedItemId) {\n return;\n }\n\n // Find the selected item and its track\n let selectedItem: MediaItem | null = null;\n let selectedTrack: Track | null = null;\n\n for (const track of currentState.tracks) {\n const item = track.items.find(i => i.id === selectedItemId);\n if (item) {\n selectedItem = item;\n selectedTrack = track;\n break;\n }\n }\n\n if (!selectedItem || !selectedTrack) {\n return;\n }\n\n const playheadTime = currentState.playheadPosition;\n const itemStart = selectedItem.startTime;\n const itemEnd = itemStart + selectedItem.duration;\n\n // Check if playhead is within the selected media item\n if (playheadTime <= itemStart || playheadTime >= itemEnd) {\n // Playhead is not within the selected media - show notification\n this.notificationsComponent?.showNotification(\n 'Position the playhead within the selected media to trim it.',\n 'warning'\n );\n return;\n }\n\n // Ensure both parts will have at least MIN_ITEM_DURATION\n const firstPartDuration = playheadTime - itemStart;\n const secondPartDuration = itemEnd - playheadTime;\n\n if (firstPartDuration < this.MIN_ITEM_DURATION || secondPartDuration < this.MIN_ITEM_DURATION) {\n this.notificationsComponent?.showNotification(\n 'Cannot trim: resulting parts would be too short.',\n 'warning'\n );\n return;\n }\n\n // Calculate mediaStartTime adjustments\n const origi************tTime = selectedItem.mediaStartTime || 0;\n const secon**************tTime = origi************tTime + firstPartDuration;\n\n // Create two new items from the original\n const firstPart: MediaItem = {\n ...selectedItem,\n id: `item-${Date.now()}-1`,\n duration: firstPartDuration\n // mediaStartTime stays the same for first part\n };\n\n const secondPart: MediaItem = {\n ...selectedItem,\n id: `item-${Date.now()}-2`,\n startTime: playheadTime,\n duration: secondPartDuration,\n mediaStartTime: secondPartMediaStartTime\n };\n\n // Update the state: remove original, add two new parts\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t => {\n if (t.id === selectedTrack!.id) {\n return {\n ...t,\n items: [\n ...t.items.filter(i => i.id !== selectedItemId),\n firstPart,\n secondPart\n ]\n };\n }\n return t;\n }),\n // Deselect after trimming\n selectedItemId: null\n }));\n\n this.notificationsComponent?.showNotification(\n 'Media trimmed successfully.',\n 'success'\n );\n }\n\n /**\n * Copy the selected media item to the clipboard.\n * Stores a copy of the item and the track it was copied from.\n */\n copySelectedMedia(): void {\n const currentState = this.state();\n const selectedItemId = currentState.selectedItemId;\n\n if (!selectedItemId) {\n return;\n }\n\n // Find the selected item and its track\n let selectedItem: MediaItem | null = null;\n let selectedTrackId: string | null = null;\n\n for (const track of currentState.tracks) {\n const item = track.items.find(i => i.id === selectedItemId);\n if (item) {\n selectedItem = item;\n selectedTrackId = track.id;\n break;\n }\n }\n\n if (!selectedItem || !selectedTrackId) {\n return;\n }\n\n // Store a copy of the item in clipboard\n this.clipboardItem.set({ ...selectedItem });\n this.clipboardSourceTrackId.set(selectedTrackId);\n\n this.notificationsComponent?.showNotification(\n 'Media copied to clipboard.',\n 'success'\n );\n }\n\n /**\n * Paste the clipboard media item at the playhead position.\n * Pastes on the same track where the item was copied from.\n * If there's no space at playhead position, finds the next available slot.\n */\n pasteMedia(): void {\n const copiedItem = this.clipboardItem();\n const sourceTrackId = this.clipboardSourceTrackId();\n\n if (!copiedItem || !sourceTrackId) {\n return;\n }\n\n const currentState = this.state();\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n\n // Find the source track\n let targetTrack = currentState.tracks.find(t => t.id === sourceTrackId);\n\n // If source track no longer exists, use the first track\n if (!targetTrack) {\n targetTrack = currentState.tracks[0];\n if (!targetTrack) {\n this.notificationsComponent?.showNotification(\n 'No tracks available to paste media.',\n 'error'\n );\n return;\n }\n }\n\n const itemDuration = copiedItem.duration;\n\n // Try to find a valid position starting from playhead\n const pastePosition = this.findPastePosition(\n playheadTime,\n itemDuration,\n targetTrack.items,\n totalDuration\n );\n\n if (pastePosition === null) {\n this.notificationsComponent?.showNotification(\n 'No space available to paste media on this track.',\n 'warning'\n );\n return;\n }\n\n // Create a new item with a new ID\n const newItem: MediaItem = {\n ...copiedItem,\n id: `item-${Date.now()}`,\n startTime: pastePosition,\n trackId: targetTrack.id\n };\n\n // Add the new item to the track\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === targetTrack!.id\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n this.notificationsComponent?.showNotification(\n 'Media pasted successfully.',\n 'success'\n );\n }\n\n /**\n * Find a valid position to paste media item.\n * First tries at the playhead position, then finds the next available gap.\n */\n private findPastePosition(\n preferredPosition: number,\n duration: number,\n existingItems: MediaItem[],\n totalDuration: number\n ): number | null {\n // Check if we can fit at the preferred position (playhead)\n if (this.canFitAtPosition(preferredPosition, duration, existingItems, totalDuration)) {\n return preferredPosition;\n }\n\n // Sort existing items by start time\n const sortedItems = [...existingItems].sort((a, b) => a.startTime - b.startTime);\n\n // Find all gaps on the track and try to place the item\n const gaps = this.dragDropService.findAllGaps(sortedItems);\n\n // First, try to find a gap that starts at or after the playhead\n for (const gap of gaps) {\n // Calculate actual gap size (considering totalDuration for infinite gaps)\n const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n const gapSize = effectiveGapEnd - gap.gapStart;\n\n if (gap.gapStart >= preferredPosition && gapSize >= duration) {\n return gap.gapStart;\n }\n }\n\n // If no gap after playhead, try any gap that can fit the item\n for (const gap of gaps) {\n // Calculate actual gap size (considering totalDuration for infinite gaps)\n const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n const gapSize = effectiveGapEnd - gap.gapStart;\n\n if (gapSize >= duration) {\n return gap.gapStart;\n }\n }\n\n // No suitable position found\n return null;\n }\n\n /**\n * Check if an item can fit at a specific position without overlapping.\n */\n private canFitAtPosition(\n position: number,\n duration: number,\n existingItems: MediaItem[],\n totalDuration: number\n ): boolean {\n // Check bounds\n if (position < 0 || position + duration > totalDuration) {\n return false;\n }\n\n // Check for overlaps with existing items\n const endPosition = position + duration;\n for (const item of existingItems) {\n const itemEnd = item.startTime + item.duration;\n // Check if there's an overlap\n if (position < itemEnd && endPosition > item.startTime) {\n return false;\n }\n }\n\n return true;\n }\n}\n",
"structuredPatch": [
{
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"lines": [
" ",
" // Track management",
" addTrack(): void {",
"+ // Save state before modification for undo",
"+ this.saveStateToHistory();",
"+",
" const currentState = this.state();",
" const newTrack: Track = {",
" id: `track-${Date.now()}`,"
]
}
],
"userModified": false,
"replaceAll": false
}
}
[2025-12-22T21:48:40.116Z] [INFO] {
"type": "assistant",
"message": {
"model": "claude-opus-4-5-20251101",
"id": "msg_01L96XfSF4zDDfsvGZKkeqCM",
"type": "message",
"role": "assistant",
"content": [
{
"type": "tool_use",
"id": "toolu_01UqRr31DfQerCNRVq3z4Ve3",
"name": "Edit",
"input": {
"file_path": "/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts",
"old_string": " removeTrack(trackId: string): void {\n const currentState = this.state();\n if (currentState.tracks.length <= 1) {\n return; // Keep at least one track\n }\n\n // Get track name before removing\n const trackToRemove = currentState.tracks.find(t => t.id === trackId);\n const trackName = trackToRemove?.name || 'Track';\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.filter(t => t.id !== trackId)\n }));",
"new_string": " removeTrack(trackId: string): void {\n const currentState = this.state();\n if (currentState.tracks.length <= 1) {\n return; // Keep at least one track\n }\n\n // Save state before modification for undo\n this.saveStateToHistory();\n\n // Get track name before removing\n const trackToRemove = currentState.tracks.find(t => t.id === trackId);\n const trackName = trackToRemove?.name || 'Track';\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.filter(t => t.id !== trackId)\n }));"
}
}
],
"stop_reason": null,
"stop_sequence": null,
"usage": {
"input_tokens": 1,
"cache_creation_input_tokens": 981,
"cache_read_input_tokens": 59120,
"cache_creation": {
"ephemeral_5m_input_tokens": 981,
"ephemeral_1h_input_tokens": 0
},
"output_tokens": 415,
"service_tier": "standard"
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"context_management": null
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"session_id": "c3de30fe-a5bd-49e6-8052-bb51f10fe87f",
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[2025-12-22T21:48:40.201Z] [INFO] {"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01UqRr31DfQerCNRVq3z4Ve3","type":"tool_result","content":"The file /tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts has been updated. Here's the result of running `cat -n` on a snippet of the edited file:\n 219→ 'success'\n 220→ );\n 221→ }\n 222→\n 223→ removeTrack(trackId: string): void {\n 224→ const currentState = this.state();\n 225→ if (currentState.tracks.length <= 1) {\n 226→ return; // Keep at least one track\n 227→ }\n 228→\n 229→ // Save state before modification for undo\n 230→ this.saveStateToHistory();\n 231→\n 232→ // Get track name before removing\n 233→ const trackToRemove = currentState.tracks.find(t => t.id === trackId);\n 234→ const trackName = trackToRemove?.name || 'Track';\n 235→\n 236→ this.state.update(s => ({\n 237→ ...s,\n 238→ tracks: s.tracks.filter(t => t.id !== trackId)\n 239→ }));\n 240→\n 241→ // Show notification for removing track\n 242→ this.notificationsComponent?.showNotification(\n 243→ `Track \"${trackName}\" removed.`,"}]},"parent_tool_use_id":null,"session_id":"c3de30fe-a5bd-49e6-8052-bb51f10fe87f","uuid":"a9b1eb03-698b-4990-b2e0-3a411031d8e8","tool_use_result":{"filePath":"/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts","oldString":" removeTrack(trackId: string): void {\n const currentState = this.state();\n if (currentState.tracks.length <= 1) {\n return; // Keep at least one track\n }\n\n // Get track name before removing\n const trackToRemove = currentState.tracks.find(t => t.id === trackId);\n const trackName = trackToRemove?.name || 'Track';\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.filter(t => t.id !== trackId)\n }));","newString":" removeTrack(trackId: string): void {\n c
[2025-12-22T21:48:40.209Z] [INFO] onst currentState = this.state();\n if (currentState.tracks.length <= 1) {\n return; // Keep at least one track\n }\n\n // Save state before modification for undo\n this.saveStateToHistory();\n\n // Get track name before removing\n const trackToRemove = currentState.tracks.find(t => t.id === trackId);\n const trackName = trackToRemove?.name || 'Track';\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.filter(t => t.id !== trackId)\n }));","originalFile":"import { Component, signal, computed, ViewChild, ElementRef, AfterViewInit, OnDestroy, effect, HostListener } from '@angular/core';\nimport { CommonModule } from '@angular/common';\nimport { MediaType, MediaItem, Track, TimelineState } from '../../models/timeline.models';\nimport { MediaLibraryComponent, MediaLibraryItem } from '../media-library/media-library.component';\nimport { Media***********onent } from '../media-toolbar/media-toolbar.component';\nimport { Notif************onent } from '../notifications/notifications.component';\nimport { Timel*************rvice } from '../../services/timeline-drag-drop.service';\nimport { PlaybackService } from '../../services/playback.service';\nimport { Timel************rvice } from '../../services/timeline-storage.service';\nimport { Timel************rvice } from '../../services/timeline-history.service';\n\n@Component({\n selector: 'app-timeline',\n standalone: true,\n imports: [CommonModule, MediaLibraryComponent, MediaToolbarComponent, NotificationsComponent],\n templateUrl: './timeline.component.html',\n styleUrl: './timeline.component.css'\n})\nexport class TimelineComponent implements AfterViewInit, OnDestroy {\n // Zoom levels: pixels per second\n private readonly MIN_ZOOM = 10;\n private readonly MAX_ZOOM = 200;\n private readonly ZOOM_STEP = 20;\n readonly TRACK_HEADER_WIDTH = 150; // Width of track header in pixels\n private readonly SNAP_PROXIMITY_MS = 500; // Snap to item if playhead is within 500ms\n private readonly MIN_ITEM_DURATION = 100; // Minimum item duration in milliseconds\n\n // Canvas dimensions for preview\n readonly PREVIEW_WIDTH = 640;\n readonly PREVIEW_HEIGHT = 360;\n\n // View references\n @ViewChild('timelineRuler') timelineRuler?: ElementRef<HTMLElement>;\n @ViewChild('notifications') notificationsComponent?: NotificationsComponent;\n @ViewChild('previewCanvas') previewCanvas?: ElementRef<HTMLCanvasElement>;\n\n // Timeline state\n readonly state = signal<TimelineState>({\n tracks: [\n { id: '1', name: 'Track 1', order: 0, items: [] },\n { id: '2', name: 'Track 2', order: 1, items: [] }\n ],\n playheadPosition: 0,\n zoomLevel: 50, // pixels per second\n totalDuration: 120000, // 120 seconds in milliseconds\n selectedItemId: null\n });\n\n // Computed values\n readonly pixel**********econd = computed(() => {\n return this.state().zoomLevel / 1000;\n });\n\n readonly timelineWidth = computed(() => {\n const state = this.state();\n // Calculate the maximum end time across all tracks\n let maxEndTime = state.totalDuration;\n\n for (const track of state.tracks) {\n for (const item of track.items) {\n const itemEndTime = item.startTime + item.duration;\n if (itemEndTime > maxEndTime) {\n maxEndTime = itemEndTime;\n }\n }\n }\n\n return maxEndTime * this.pixelsPerMillisecond();\n });\n\n readonly timelineLineHeight = computed(() => {\n const state = this.state();\n return state.tracks.length * 60 + 32;\n });\n\n readonly playheadPosition = computed(() => {\n return this.state().playheadPosition * this.pixelsPerMillisecond();\n });\n\n readonly playh************ition = computed(() => {\n return this.playheadPosition() + this.TRACK_HEADER_WIDTH;\n });\n\n // Computed: whether a media item is currently selected\n readonly hasSelectedItem = computed(() => {\n return this.state().selectedItemId !== null;\n });\n\n // Dragging state\n private draggedItem: MediaItem | null = null;\n private draggedItemOriginalTrackId: string | null = null;\n private dragOffsetTime: number = 0; // Offset in milliseconds from item start to cursor position\n private isDraggingPlayhead = false;\n private isDraggingFromRuler = false;\n private resizingItem: { item: MediaItem; edge: 'left' | 'right' } | null = null;\n private mouseDownPosition: { x: number; y: number } | null = null; // Track mouse down position for click detection\n\n // Video preview state\n readonly isPlaying = signal<boolean>(false);\n\n // Duration editor state\n readonly showDurationEditor = signal<boolean>(false);\n private editedDuration: number = 120; // Duration in seconds\n\n // Media library state\n readonly showMediaLibrary = signal<boolean>(false);\n private mediaLibraryTargetTrackId: string | null = null;\n\n // Clipboard state for copy/paste functionality\n private readonly clipboardItem = signal<MediaItem | null>(null);\n private readonly clipb************ackId = signal<string | null>(null);\n\n // Computed: whether a media item is in clipboard\n readonly hasClipboardItem = computed(() => {\n return this.clipboardItem() !== null;\n });\n\n // Computed: whether undo/redo is available\n readonly canUndo = computed(() => this.historyService.canUndo());\n readonly canRedo = computed(() => this.historyService.canRedo());\n\n // Render loop ID for cleanup\n private renderLoopId: number | null = null;\n\n constructor(\n private dragDropService: TimelineDragDropService,\n public playbackService: PlaybackService,\n private storageService: TimelineStorageService,\n private historyService: TimelineHistoryService\n ) {\n // Load saved state from LocalStorage on initialization\n const savedState = this.storageService.loadState();\n if (savedState) {\n this.state.set(savedState);\n }\n\n // Effect to sync playhead position from PlaybackService during playback\n effect(() => {\n if (this.playbackService.isPlaying()) {\n const position = this.playbackService.playheadPosition();\n this.state.update(s => ({\n ...s,\n playheadPosition: position\n }));\n }\n });\n\n // Effect to auto-save timeline state to LocalStorage on any change\n effect(() => {\n const currentState = this.state();\n this.storageService.saveState(currentState);\n });\n }\n\n ngAfterViewInit(): void {\n // Initialize canvas for preview rendering\n if (this.previewCanvas) {\n this.playbackService.setCanvas(this.previewCanvas.nativeElement);\n }\n\n // Start continuous render loop for preview (renders current frame even when paused)\n this.startRenderLoop();\n\n // Synchronize media and render initial frame if state was loaded from LocalStorage\n const currentState = this.state();\n if (currentState.tracks.length > 0) {\n this.playbackService.seek(currentState.tracks, currentState.playheadPosition);\n }\n }\n\n ngOnDestroy(): void {\n // Clean up render loop\n if (this.renderLoopId !== null) {\n cancelAnimationFrame(this.renderLoopId);\n this.renderLoopId = null;\n }\n\n // Stop playback\n this.playbackService.stop();\n }\n\n /**\n * Continuous render loop for preview canvas.\n * Keeps rendering even when paused so seeking updates the preview.\n */\n private startRenderLoop(): void {\n const render = () => {\n // Only render if we have active media and are not playing\n // (PlaybackService handles rendering during playback)\n if (!this.playbackService.isPlaying()) {\n this.playbackService.renderCurrentFrame();\n }\n this.renderLoopId = requestAnimationFrame(render);\n };\n this.renderLoopId = requestAnimationFrame(render);\n }\n\n // Track management\n addTrack(): void {\n // Save state before modification for undo\n this.saveStateToHistory();\n\n const currentState = this.state();\n const newTrack: Track = {\n id: `track-${Date.now()}`,\n name: `Track ${currentState.tracks.length + 1}`,\n order: currentState.tracks.length,\n items: []\n };\n\n this.state.update(s => ({\n ...s,\n tracks: [...s.tracks, newTrack]\n }));\n\n // Show notification for adding track\n this.notificationsComponent?.showNotification(\n `Track \"${newTrack.name}\" added.`,\n 'success'\n );\n }\n\n removeTrack(trackId: string): void {\n const currentState = this.state();\n if (currentState.tracks.length <= 1) {\n return; // Keep at least one track\n }\n\n // Get track name before removing\n const trackToRemove = currentState.tracks.find(t => t.id === trackId);\n const trackName = trackToRemove?.name || 'Track';\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.filter(t => t.id !== trackId)\n }));\n\n // Show notification for removing track\n this.notificationsComponent?.showNotification(\n `Track \"${trackName}\" removed.`,\n 'info'\n );\n }\n\n // Zoom controls\n zoomIn(): void {\n this.state.update(s => ({\n ...s,\n zoomLevel: Math.min(s.zoomLevel + this.ZOOM_STEP, this.MAX_ZOOM)\n }));\n }\n\n zoomOut(): void {\n this.state.update(s => ({\n ...s,\n zoomLevel: Math.max(s.zoomLevel - this.ZOOM_STEP, this.MIN_ZOOM)\n }));\n }\n\n // Utility method to extract coordinates from mouse or touch events\n private getEventCoordinates(event: MouseEvent | TouchEvent): { clientX: number; clientY: number } {\n if (event instanceof MouseEvent) {\n return { clientX: event.clientX, clientY: event.clientY };\n } else {\n const touch = event.touches[0] || event.changedTouches[0];\n return { clientX: touch.clientX, clientY: touch.clientY };\n }\n }\n\n // Playhead controls\n onRulerPointerDown(event: MouseEvent | TouchEvent): void {\n event.preventDefault();\n this.isDraggingFromRuler = true;\n\n // Immediately update position on pointer down\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n const coords = this.getEventCoordinates(event);\n // Calculate position within the ruler element\n // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n const x = coords.clientX - rect.left;\n const newPosition = x / this.pixelsPerMillisecond();\n const currentState = this.state();\n const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n\n this.state.update(s => ({\n ...s,\n playheadPosition: clampedPosition\n }));\n\n // Sync position to playback service for seeking\n this.playbackService.seek(currentState.tracks, clampedPosition);\n }\n\n onPlayheadPointerDown(event: MouseEvent | TouchEvent): void {\n event.preventDefault();\n event.stopPropagation();\n this.isDraggingPlayhead = true;\n }\n\n\n // Media item drag and drop\n onMediaItemPointerDown(event: MouseEvent | TouchEvent, item: MediaItem, track: Track): void {\n const target = event.target as HTMLElement;\n\n // Check if clicking/touching on resize handle\n if (target.classList.contains('resize-handle')) {\n this.resizingItem = {\n item,\n edge: target.classList.contains('resize-handle-left') ? 'left' : 'right'\n };\n event.preventDefault();\n return;\n }\n\n const coords = this.getEventCoordinates(event);\n this.mouseDownPosition = { x: coords.clientX, y: coords.clientY };\n\n const mediaItemElement = event.currentTarget as HTMLElement;\n const rect = mediaItemElement.getBoundingClientRect();\n const clickX = coords.clientX - rect.left;\n\n // Convert pixel offset to time offset\n this.dragOffsetTime = clickX / this.pixelsPerMillisecond();\n\n this.draggedItem = item;\n this.draggedItemOriginalTrackId = track.id;\n event.preventDefault();\n }\n\n onTrackPointerDown(event: MouseEvent | TouchEvent): void {\n // Deselect when clicking/touching track background (not on media item)\n const target = event.target as HTMLElement;\n if (target.classList.contains('track')) {\n this.deselectMediaItem();\n }\n }\n\n onTrackPointerMove(event: MouseEvent | TouchEvent, track: Track): void {\n if (this.resizingItem) {\n this.handleResize(event, track);\n return;\n }\n event.preventDefault();\n event.stopPropagation();\n\n if (!this.draggedItem) return;\n\n const coords = this.getEventCoordinates(event);\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n const x = coords.clientX - rect.left;\n const requestedStartTime = Math.max(0, x / this.pixelsPerMillisecond() - this.dragOffsetTime);\n\n this.state.update(s => {\n const updatedTracks = s.tracks.map(t => {\n if (t.id === track.id) {\n // Get all items except the dragged one for collision detection\n const otherItems = t.items.filter(i => i.id !== this.draggedItem!.id);\n\n // Fix for issue #81: Find snap targets (playhead and items on all tracks)\n const snapTargets = this.dragDropService.findSnapTargets(\n this.draggedItem!.id,\n s.tracks,\n s.playheadPosition\n );\n\n // Calculate valid position and duration considering collisions, gap fitting, and snapping\n const validPosition = this.dragDropService.getValidDragPosition(\n this.draggedItem!,\n requestedStartTime,\n otherItems,\n s.totalDuration,\n snapTargets\n );\n\n // Check if item already exists in this track\n const itemExists = t.items.some(i => i.id === this.draggedItem!.id);\n\n if (itemExists) {\n // Update position and duration in current track\n return {\n ...t,\n items: t.items.map(i =>\n i.id === this.draggedItem!.id\n ? {\n ...i,\n startTime: validPosition.startTime,\n duration: validPosition.duration,\n trackId: track.id\n }\n : i\n )\n };\n } else {\n // Add to new track with adjusted position and duration\n return {\n ...t,\n items: [\n ...otherItems,\n {\n ...this.draggedItem!,\n startTime: validPosition.startTime,\n duration: validPosition.duration,\n trackId: track.id\n }\n ]\n };\n }\n } else if (t.id === this.draggedItemOriginalTrackId && t.id !== track.id) {\n // Remove from original track only if moving to different track\n return {\n ...t,\n items: t.items.filter(i => i.id !== this.draggedItem!.id)\n };\n }\n return t;\n });\n\n // Update the original track ID to current track for smooth dragging within same track\n this.draggedItemOriginalTrackId = track.id;\n\n return { ...s, tracks: updatedTracks };\n });\n }\n\n private handleResize(event: MouseEvent | TouchEvent, track: Track): void {\n if (!this.resizingItem) return;\n\n const coords = this.getEventCoordinates(event);\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n // Fix for issue #83: getBoundingClientRect() returns viewport-relative coordinates,\n // and coords.clientX is also viewport-relative, so we don't need to add scrollLeft\n const x = coords.clientX - rect.left;\n const timeAtCursor = x / this.pixelsPerMillisecond();\n\n this.state.update(s => {\n // Fix for issue #87: Find snap targets for resize operations\n const snapTargets = this.dragDropService.findSnapTargets(\n this.resizingItem!.item.id,\n s.tracks,\n s.playheadPosition\n );\n\n const updatedTracks = s.tracks.map(t => {\n if (t.id === track.id) {\n // Get resize bounds considering adjacent items\n const bounds = this.dragDropService.getResizeBounds(\n this.resizingItem!.item,\n t.items,\n this.resizingItem!.edge,\n s.totalDuration\n );\n\n return {\n ...t,\n items: t.items.map(i => {\n if (i.id === this.resizingItem!.item.id) {\n if (this.resizingItem!.edge === 'left') {\n // Fix for issue #89: Handle mediaStartTime when resizing from left\n // Apply snapping to left edge (start time)\n let newStartTime = Math.max(\n bounds.minTime,\n Math.min(timeAtCursor, bounds.maxTime)\n );\n\n // Apply snapping if within snap distance\n let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n for (const target of snapTargets) {\n const distance = Math.abs(newStartTime - target);\n if (distance < minDistance) {\n minDistance = distance;\n // Only snap if within bounds\n if (target >= bounds.minTime && target <= bounds.maxTime) {\n newStartTime = target;\n }\n }\n }\n\n // Calculate how much the timeline position is changing\n const deltaTime = newStartTime - i.startTime;\n const newDuration = i.duration - deltaTime;\n\n // Update media start time (trimming from source media)\n const curre***********tTime = i.mediaStartTime || 0;\n const newMediaStartTime = curre***********tTime + deltaTime;\n\n // Check if we're trying to extend beyond the start of source media\n if (newMediaStartTime < 0) {\n // Can only extend left by curre***********tTime amount\n const maxExtension = currentMediaStartTime;\n const finalStartTime = i.startTime - maxExtension;\n const finalDuration = i.duration + maxExtension;\n\n // Ensure we don't exceed maxDuration\n if (i.maxDuration && finalDuration > i.maxDuration) {\n return {\n ...i,\n startTime: finalStartTime + (finalDuration - i.maxDuration),\n duration: i.maxDuration,\n mediaStartTime: 0\n };\n }\n\n return {\n ...i,\n startTime: finalStartTime,\n duration: finalDuration,\n mediaStartTime: 0\n };\n }\n\n // Ensure media end doesn't exceed maxDuration\n if (i.maxDuration && newMediaStartTime + newDuration > i.maxDuration) {\n const maxAllowedDuration = i.maxDuration - newMediaStartTime;\n return {\n ...i,\n startTime: i.startTime + (i.duration - maxAllowedDuration),\n duration: maxAllowedDuration,\n mediaStartTime: newMediaStartTime\n };\n }\n\n return {\n ...i,\n startTime: newStartTime,\n duration: newDuration,\n mediaStartTime: newMediaStartTime\n };\n } else {\n // Fix for issue #87: Apply snapping to right edge (end time)\n let newEndTime = Math.max(\n bounds.minTime,\n Math.min(timeAtCursor, bounds.maxTime)\n );\n\n // Apply snapping if within snap distance\n let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n for (const target of snapTargets) {\n const distance = Math.abs(newEndTime - target);\n if (distance < minDistance) {\n minDistance = distance;\n // Only snap if within bounds\n if (target >= bounds.minTime && target <= bounds.maxTime) {\n newEndTime = target;\n }\n }\n }\n\n const newDuration = newEndTime - i.startTime;\n\n // Limit duration by maxDuration if specified\n const limitedDuration = i.maxDuration\n ? Math.min(newDuration, i.maxDuration)\n : newDuration;\n\n return { ...i, duration: limitedDuration };\n }\n }\n return i;\n })\n };\n }\n return t;\n });\n\n return { ...s, tracks: updatedTracks };\n });\n }\n\n onPointerUp(event: MouseEvent | TouchEvent): void {\n // Detect if this was a click/tap (not a drag) on a media item\n if (this.draggedItem && this.mouseDownPosition) {\n const coords = this.getEventCoordinates(event);\n const dx = coords.clientX - this.mouseDownPosition.x;\n const dy = coords.clientY - this.mouseDownPosition.y;\n const distance = Math.sqrt(dx * dx + dy * dy);\n\n // If pointer moved less than 5 pixels, consider it a click/tap\n if (distance < 5) {\n this.selectMediaItem(this.draggedItem.id);\n }\n }\n\n this.draggedItem = null;\n this.draggedItemOriginalTrackId = null;\n this.dragOffsetTime = 0;\n this.isDraggingPlayhead = false;\n this.isDraggingFromRuler = false;\n this.resizingItem = null;\n this.mouseDownPosition = null;\n }\n\n onDocumentPointerMove(event: MouseEvent | TouchEvent): void {\n if (this.isDraggingPlayhead || this.isDraggingFromRuler) {\n // Fix for issue #50: Use ViewChild reference to ensure we use the exact same element as onRulerPointerDown\n if (!this.timelineRuler) {\n return;\n }\n\n const coords = this.getEventCoordinates(event);\n const rulerElement = this.timelineRuler.nativeElement;\n // Use the same calculation as onRulerPointerDown\n // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n const rect = rulerElement.getBoundingClientRect();\n const x = coords.clientX - rect.left;\n const newPosition = x / this.pixelsPerMillisecond();\n const currentState = this.state();\n const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n\n this.state.update(s => ({\n ...s,\n playheadPosition: clampedPosition\n }));\n\n // Sync position to playback service for seeking (but don't call too frequently during drag)\n this.playbackService.seek(currentState.tracks, clampedPosition);\n }\n\n // Fix for issue #96: Handle media item dragging and resizing at document level for touch events\n // This allows dragging between tracks on mobile devices\n if (event instanceof TouchEvent) {\n if (this.draggedItem) {\n // Find which track the touch is currently over\n const targetTrack = this.findTrackAtCoordinates(this.getEventCoordinates(event));\n if (targetTrack) {\n // Reuse existing drag logic\n this.onTrackPointerMove(event, targetTrack);\n }\n } else if (this.resizingItem) {\n // Find the track that contains the resizing item\n const targetTrack = this.findTrackContainingItem(this.resizingItem.item.id);\n if (targetTrack) {\n // Reuse existing resize logic\n this.handleResize(event, targetTrack);\n }\n }\n }\n }\n\n // Helper method to find which track is at the given Y coordinate\n private findTrackAtCoordinates(coords: { clientX: number; clientY: number }): Track | null {\n const trackElements = document.querySelectorAll('.track');\n for (const trackElement of Array.from(trackElements)) {\n const rect = trackElement.getBoundingClientRect();\n if (coords.clientY >= rect.top && coords.clientY <= rect.bottom) {\n const trackIndex = Array.from(trackElements).indexOf(trackElement);\n const tracks = this.state().tracks;\n if (trackIndex >= 0 && trackIndex < tracks.length) {\n return tracks[trackIndex];\n }\n }\n }\n return null;\n }\n\n // Helper method to find the track containing a specific item\n private findTrackContainingItem(itemId: string): Track | null {\n const currentState = this.state();\n for (const track of currentState.tracks) {\n if (track.items.some(item => item.id === itemId)) {\n return track;\n }\n }\n return null;\n }\n\n // Helper methods\n getItemStyle(item: MediaItem) {\n return {\n left: `${item.startTime * this.pixelsPerMillisecond()}px`,\n width: `${item.duration * this.pixelsPerMillisecond()}px`\n };\n }\n\n getMediaTypeClass(type: MediaType): string {\n return `media-${type}`;\n }\n\n formatTime(milliseconds: number): string {\n const seconds = Math.floor(milliseconds / 1000);\n const minutes = Math.floor(seconds / 60);\n const remainingSeconds = seconds % 60;\n const cs = Math.floor((milliseconds % 1000) / 10);\n return `${minutes}:${remainingSeconds.toString().padStart(2, '0')}.${cs.toString().padStart(2, '0')}`;\n }\n\n /**\n * Calculate appropriate time interval for markers based on zoom level\n * to prevent marker labels from overlapping\n */\n private getMarkerInterval(): number {\n // Minimum spacing between markers in pixels to prevent overlap\n // Enough space for \"0:00.000\" text (about 50-60px)\n const MIN_M***********NG_PX = 60;\n\n // Calculate how much time represents MIN_M***********NG_PX at current zoom\n const pixelsPerMs = this.pixelsPerMillisecond();\n const minTimeSpacing = MIN_M***********NG_PX / pixelsPerMs;\n\n // Define possible intervals (in ms): 100ms, 250ms, 500ms, 1s, 2s, 5s, 10s, 30s, 60s\n const intervals = [100, 250, 500, 1000, 2000, 5000, 10000, 30000, 60000];\n\n // Find the smallest interval that's larger than or equal to minTimeSpacing\n for (const interval of intervals) {\n if (interval >= minTimeSpacing) {\n return interval;\n }\n }\n\n // If even 60s is too small, use larger intervals\n return Math.ceil(minTimeSpacing / 60000) * 60000;\n }\n\n getTimeMarkers(): { position: number; label: string }[] {\n const markers: { position: number; label: string }[] = [];\n const stepMs = this.getMarkerInterval(); // Dynamic interval based on zoom level\n\n // Fix for issue #85: Do not show the last time mark at totalDuration\n // to prevent container expansion from the text label\n for (let time = 0; time < this.state().totalDuration; time += stepMs) {\n markers.push({\n position: time * this.pixelsPerMillisecond(),\n label: this.formatTime(time)\n });\n }\n\n return markers;\n }\n\n // Add placeholder media item\n addMediaItem(type: MediaType, trackId: string): void {\n const currentState = this.state();\n const track = currentState.tracks.find(t => t.id === trackId);\n\n if (!track) return;\n\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n const newItemDuration = type === MediaType.IMAGE ? 5000 : 3000;\n\n // Determine the start time for the new item using the service\n const startTime = this.dragDropService.calculateNewItemStartTime(\n playheadTime,\n track.items,\n this.SNAP_PROXIMITY_MS\n );\n\n // Fix for issue #48: Ensure new item doesn't exceed totalDuration\n const maxAllowedDuration = totalDuration - startTime;\n const finalDuration = Math.min(newItemDuration, maxAllowedDuration);\n\n // Fix for issue #64: Verify that the new item doesn't overlap with any existing items\n const testItem: MediaItem = {\n id: 'temp',\n type,\n startTime,\n duration: finalDuration,\n trackId,\n name: '',\n isPlaceholder: true\n };\n\n // Validate and adjust position if needed\n const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n\n // Recalculate duration limit if position was adjusted\n const adjus****************ation = totalDuration - validatedStartTime;\n const adjustedDuration = Math.min(newItemDuration, adjustedMaxAllowedDuration);\n\n // Create the final non-overlapping item\n const newItem: MediaItem = {\n id: `item-${Date.now()}`,\n type,\n startTime: validatedStartTime,\n duration: adjustedDuration,\n trackId,\n name: `${type} placeholder`,\n isPlaceholder: true\n };\n\n // Set maxDuration for audio and video placeholders\n if (type === MediaType.VIDEO) {\n newItem.maxDuration = Math.min(10000, adjustedMaxAllowedDuration); // 10 seconds default for video\n } else if (type === MediaType.AUDIO) {\n newItem.maxDuration = Math.min(15000, adjustedMaxAllowedDuration); // 15 seconds default for audio\n }\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === trackId\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n // Show notification for adding media\n this.notificationsComponent?.showNotification(\n 'Media added to timeline.',\n 'success'\n );\n }\n\n removeMediaItem(itemId: string, trackId: string): void {\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === trackId\n ? { ...t, items: t.items.filter(i => i.id !== itemId) }\n : t\n ),\n // Deselect if removing selected item\n selectedItemId: s.selectedItemId === itemId ? null : s.selectedItemId\n }));\n\n // Show notification for removing media\n this.notificationsComponent?.showNotification(\n 'Media removed from timeline.',\n 'info'\n );\n }\n\n // Media selection\n selectMediaItem(itemId: string): void {\n this.state.update(s => ({\n ...s,\n selectedItemId: itemId\n }));\n }\n\n deselectMediaItem(): void {\n this.state.update(s => ({\n ...s,\n selectedItemId: null\n }));\n }\n\n isItemSelected(itemId: string): boolean {\n return this.state().selectedItemId === itemId;\n }\n\n readonly MediaType = MediaType;\n\n /**\n * Create a new project by clearing the timeline and LocalStorage\n */\n newProject(): void {\n // Stop playback if playing\n if (this.playbackService.isPlaying()) {\n this.playbackService.stop();\n this.isPlaying.set(false);\n }\n\n // Reset timeline state to initial values\n this.state.set({\n tracks: [\n { id: '1', name: 'Track 1', order: 0, items: [] },\n { id: '2', name: 'Track 2', order: 1, items: [] }\n ],\n playheadPosition: 0,\n zoomLevel: 50,\n totalDuration: 120000,\n selectedItemId: null\n });\n\n // Clear LocalStorage\n this.storageService.clearState();\n\n // Show notification\n this.notificationsComponent?.showNotification(\n 'New project created. Timeline cleared.',\n 'success'\n );\n\n // Clear undo/redo history when creating a new project\n this.historyService.clearHistory();\n }\n\n /**\n * Push current state to history before making a change.\n * Should be called at the start of any operation that modifies the timeline.\n */\n private saveStateToHistory(): void {\n this.historyService.pushState(this.state());\n }\n\n /**\n * Undo the last action.\n * Restores the previous timeline state.\n */\n undo(): void {\n const previousState = this.historyService.undo(this.state());\n if (previousState) {\n this.state.set(previousState);\n\n // Sync playback service with new state\n this.playbackService.seek(previousState.tracks, previousState.playheadPosition);\n\n this.notificationsComponent?.showNotification('Undo successful.', 'info');\n }\n }\n\n /**\n * Redo the last undone action.\n * Restores the next timeline state.\n */\n redo(): void {\n const nextState = this.historyService.redo(this.state());\n if (nextState) {\n this.state.set(nextState);\n\n // Sync playback service with new state\n this.playbackService.seek(nextState.tracks, nextState.playheadPosition);\n\n this.notificationsComponent?.showNotification('Redo successful.', 'info');\n }\n }\n\n /**\n * Handle keyboard shortcuts for undo/redo.\n */\n @HostListener('document:keydown', ['$event'])\n handleKeyboardShortcuts(event: KeyboardEvent): void {\n // Skip if user is typing in an input field\n const target = event.target as HTMLElement;\n if (target.tagName === 'INPUT' || target.tagName === 'TEXTAREA') {\n return;\n }\n\n // Ctrl+Z or Cmd+Z for undo\n if ((event.ctrlKey || event.metaKey) && event.key === 'z' && !event.shiftKey) {\n event.preventDefault();\n this.undo();\n }\n\n // Ctrl+Y or Cmd+Shift+Z for redo\n if ((event.ctrlKey || event.metaKey) && (event.key === 'y' || (event.key === 'z' && event.shiftKey))) {\n event.preventDefault();\n this.redo();\n }\n }\n\n // Video preview controls\n togglePlayback(): void {\n const currentState = this.state();\n\n if (this.playbackService.isPlaying()) {\n this.playbackService.pause();\n this.isPlaying.set(false);\n } else {\n // Sync playhead position to PlaybackService before starting\n this.playbackService.setPlayheadPosition(currentState.playheadPosition);\n this.playbackService.play(currentState.tracks, currentState.totalDuration);\n this.isPlaying.set(true);\n }\n }\n\n skipBackward(): void {\n const currentState = this.state();\n const newPosition = Math.max(0, currentState.playheadPosition - 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startTime;\n const finalDuration = Math.min(media.duration, maxAllowedDuration);\n\n // Verify that the new item doesn't overlap with any existing items\n const testItem: MediaItem = {\n id: 'temp',\n type: media.type,\n startTime,\n duration: finalDuration,\n trackId: this.mediaLibraryTargetTrackId,\n name: '',\n isPlaceholder: false\n };\n\n // Validate and adjust position if needed\n const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n\n // Recalculate duration limit if position was adjusted\n const adjus****************ation = totalDuration - validatedStartTime;\n const adjustedDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n\n // Create the final non-overlapping item\n const newItem: MediaItem = {\n id: `item-${Date.now()}`,\n type: media.type,\n startTime: validatedStartTime,\n duration: adjustedDuration,\n trackId: this.mediaLibraryTargetTrackId,\n name: media.name,\n url: media.url, // Pass URL from media library for playback\n isPlaceholder: false\n };\n\n // Set maxDuration for audio and video\n if (media.type === MediaType.VIDEO) {\n newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n } else if (media.type === MediaType.AUDIO) {\n newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n }\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === this.mediaLibraryTargetTrackId\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n // Show notification for adding media\n this.notificationsComponent?.showNotification(\n `\"${media.name}\" added to timeline.`,\n 'success'\n );\n\n // Close the media library after selection\n this.closeMediaLibrary();\n }\n\n /**\n * Trim (split) the selected media item at the playhead position.\n * Creates two separate items from the original media.\n */\n trimSelectedMedia(): void {\n const currentState = this.state();\n const selectedItemId = currentState.selectedItemId;\n\n if (!selectedItemId) {\n return;\n }\n\n // Find the selected item and its track\n let selectedItem: MediaItem | null = null;\n let selectedTrack: Track | null = null;\n\n for (const track of currentState.tracks) {\n const item = track.items.find(i => i.id === selectedItemId);\n if (item) {\n selectedItem = item;\n selectedTrack = track;\n break;\n }\n }\n\n if (!selectedItem || !selectedTrack) {\n return;\n }\n\n const playheadTime = currentState.playheadPosition;\n const itemStart = selectedItem.startTime;\n const itemEnd = itemStart + selectedItem.duration;\n\n // Check if playhead is within the selected media item\n if (playheadTime <= itemStart || playheadTime >= itemEnd) {\n // Playhead is not within the selected media - show notification\n this.notificationsComponent?.showNotification(\n 'Position the playhead within the selected media to trim it.',\n 'warning'\n );\n return;\n }\n\n // Ensure both parts will have at least MIN_ITEM_DURATION\n const firstPartDuration = playheadTime - itemStart;\n const secondPartDuration = itemEnd - playheadTime;\n\n if (firstPartDuration < this.MIN_ITEM_DURATION || secondPartDuration < this.MIN_ITEM_DURATION) {\n this.notificationsComponent?.showNotification(\n 'Cannot trim: resulting parts would be too short.',\n 'warning'\n );\n return;\n }\n\n // Calculate mediaStartTime adjustments\n const origi************tTime = selectedItem.mediaStartTime || 0;\n const secon**************tTime = origi************tTime + firstPartDuration;\n\n // Create two new items from the original\n const firstPart: MediaItem = {\n ...selectedItem,\n id: `item-${Date.now()}-1`,\n duration: firstPartDuration\n // mediaStartTime stays the same for first part\n };\n\n const secondPart: MediaItem = {\n ...selectedItem,\n id: `item-${Date.now()}-2`,\n startTime: playheadTime,\n duration: secondPartDuration,\n mediaStartTime: secondPartMediaStartTime\n };\n\n // Update the state: remove original, add two new parts\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t => {\n if (t.id === selectedTrack!.id) {\n return {\n ...t,\n items: [\n ...t.items.filter(i => i.id !== selectedItemId),\n firstPart,\n secondPart\n ]\n };\n }\n return t;\n }),\n // Deselect after trimming\n selectedItemId: null\n }));\n\n this.notificationsComponent?.showNotification(\n 'Media trimmed successfully.',\n 'success'\n );\n }\n\n /**\n * Copy the selected media item to the clipboard.\n * Stores a copy of the item and the track it was copied from.\n */\n copySelectedMedia(): void {\n const currentState = this.state();\n const selectedItemId = currentState.selectedItemId;\n\n if (!selectedItemId) {\n return;\n }\n\n // Find the selected item and its track\n let selectedItem: MediaItem | null = null;\n let selectedTrackId: string | null = null;\n\n for (const track of currentState.tracks) {\n const item = track.items.find(i => i.id === selectedItemId);\n if (item) {\n selectedItem = item;\n selectedTrackId = track.id;\n break;\n }\n }\n\n if (!selectedItem || !selectedTrackId) {\n return;\n }\n\n // Store a copy of the item in clipboard\n this.clipboardItem.set({ ...selectedItem });\n this.clipboardSourceTrackId.set(selectedTrackId);\n\n this.notificationsComponent?.showNotification(\n 'Media copied to clipboard.',\n 'success'\n );\n }\n\n /**\n * Paste the clipboard media item at the playhead position.\n * Pastes on the same track where the item was copied from.\n * If there's no space at playhead position, finds the next available slot.\n */\n pasteMedia(): void {\n const copiedItem = this.clipboardItem();\n const sourceTrackId = this.clipboardSourceTrackId();\n\n if (!copiedItem || !sourceTrackId) {\n return;\n }\n\n const currentState = this.state();\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n\n // Find the source track\n let targetTrack = currentState.tracks.find(t => t.id === sourceTrackId);\n\n // If source track no longer exists, use the first track\n if (!targetTrack) {\n targetTrack = currentState.tracks[0];\n if (!targetTrack) {\n this.notificationsComponent?.showNotification(\n 'No tracks available to paste media.',\n 'error'\n );\n return;\n }\n }\n\n const itemDuration = copiedItem.duration;\n\n // Try to find a valid position starting from playhead\n const pastePosition = this.findPastePosition(\n playheadTime,\n itemDuration,\n targetTrack.items,\n totalDuration\n );\n\n if (pastePosition === null) {\n this.notificationsComponent?.showNotification(\n 'No space available to paste media on this track.',\n 'warning'\n );\n return;\n }\n\n // Create a new item with a new ID\n const newItem: MediaItem = {\n ...copiedItem,\n id: `item-${Date.now()}`,\n startTime: pastePosition,\n trackId: targetTrack.id\n };\n\n // Add the new item to the track\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === targetTrack!.id\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n this.notificationsComponent?.showNotification(\n 'Media pasted successfully.',\n 'success'\n );\n }\n\n /**\n * Find a valid position to paste media item.\n * First tries at the playhead position, then finds the next available gap.\n */\n private findPastePosition(\n preferredPosition: number,\n duration: number,\n existingItems: MediaItem[],\n totalDuration: number\n ): number | null {\n // Check if we can fit at the preferred position (playhead)\n if (this.canFitAtPosition(preferredPosition, duration, existingItems, totalDuration)) {\n return preferredPosition;\n }\n\n // Sort existing items by start time\n const sortedItems = [...existingItems].sort((a, b) => a.startTime - b.startTime);\n\n // Find all gaps on the track and try to place the item\n const gaps = this.dragDropService.findAllGaps(sortedItems);\n\n // First, try to find a gap that starts at or after the playhead\n for (const gap of gaps) {\n // Calculate actual gap size (considering totalDuration for infinite gaps)\n const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n const gapSize = effectiveGapEnd - gap.gapStart;\n\n if (gap.gapStart >= preferredPosition && gapSize >= duration) {\n return gap.gapStart;\n }\n }\n\n // If no gap after playhead, try any gap that can fit the item\n for (const gap of gaps) {\n // Calculate actual gap size (considering totalDuration for infinite gaps)\n const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n const gapSize = effectiveGapEnd - gap.gapStart;\n\n if (gapSize >= duration) {\n return gap.gapStart;\n }\n }\n\n // No suitable position found\n return null;\n }\n\n /**\n * Check if an item can fit at a specific position without overlapping.\n */\n private canFitAtPosition(\n position: number,\n duration: number,\n existingItems: MediaItem[],\n totalDuration: number\n ): boolean {\n // Check bounds\n if (position < 0 || position + duration > totalDuration) {\n return false;\n }\n\n // Check for overlaps with existing items\n const endPosition = position + duration;\n for (const item of existingItems) {\n const itemEnd = item.startTime + item.duration;\n // Check if there's an overlap\n if (position < itemEnd && endPosition > item.startTime) {\n return false;\n }\n }\n\n return true;\n }\n}\n","structuredPatch":[{"oldStart":226,"oldLines":6,"newStart":226,"newLines":9,"lines":[" return; // Keep at least one track"," }"," ","+ // Save state before modification for undo","+ this.saveStateToHistory();","+"," // Get track name before removing"," const trackToRemove = currentState.tracks.find(t => t.id === trackId);"," const trackName = trackToRemove?.name || 'Track';"]}],"userModified":false,"replaceAll":false}}
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"content": " 733→ }\n 734→\n 735→ // Add placeholder media item\n 736→ addMediaItem(type: MediaType, trackId: string): void {\n 737→ const currentState = this.state();\n 738→ const track = currentState.tracks.find(t => t.id === trackId);\n 739→\n 740→ if (!track) return;\n 741→\n 742→ const playheadTime = currentState.playheadPosition;\n 743→ const totalDuration = currentState.totalDuration;\n 744→ const newItemDuration = type === MediaType.IMAGE ? 5000 : 3000;\n 745→\n 746→ // Determine the start time for the new item using the service\n 747→ const startTime = this.dragDropService.calculateNewItemStartTime(\n 748→ playheadTime,\n 749→ track.items,\n 750→ this.SNAP_PROXIMITY_MS\n 751→ );\n 752→\n 753→ // Fix for issue #48: Ensure new item doesn't exceed totalDuration\n 754→ const maxAllowedDuration = totalDuration - startTime;\n 755→ const finalDuration = Math.min(newItemDuration, maxAllowedDuration);\n 756→\n 757→ // Fix for issue #64: Verify that the new item doesn't overlap with any existing items\n 758→ const testItem: MediaItem = {\n 759→ id: 'temp',\n 760→ type,\n 761→ startTime,\n 762→ duration: finalDuration,\n 763→ trackId,\n 764→ name: '',\n 765→ isPlaceholder: true\n 766→ };\n 767→\n 768→ // Validate and adjust position if needed\n 769→ const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n 770→\n 771→ // Recalculate duration limit if position was adjusted\n 772→ const adjus****************ation = totalDuration - validatedStartTime;\n 773→ const adjustedDuration = Math.min(newItemDuration, adjustedMaxAllowedDuration);\n 774→\n 775→ // Create the final non-overlapping item\n 776→ const newItem: MediaItem = {\n 777→ id: `item-${Date.now()}`,\n 778→ type,\n 779→ startTime: validatedStartTime,\n 780→ duration: adjustedDuration,\n 781→ trackId,\n 782→ name: `${type} placeholder`,\n 783→ isPlaceholder: true\n 784→ };\n 785→\n 786→ // Set maxDuration for audio and video placeholders\n 787→ if (type === MediaType.VIDEO) {\n 788→ newItem.maxDuration = Math.min(10000, adjustedMaxAllowedDuration); // 10 seconds default for video\n 789→ } else if (type === MediaType.AUDIO) {\n 790→ newItem.maxDuration = Math.min(15000, adjustedMaxAllowedDuration); // 15 seconds default for audio\n 791→ }\n 792→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"
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"content": " }\n\n // Add placeholder media item\n addMediaItem(type: MediaType, trackId: string): void {\n const currentState = this.state();\n const track = currentState.tracks.find(t => t.id === trackId);\n\n if (!track) return;\n\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n const newItemDuration = type === MediaType.IMAGE ? 5000 : 3000;\n\n // Determine the start time for the new item using the service\n const startTime = this.dragDropService.calculateNewItemStartTime(\n playheadTime,\n track.items,\n this.SNAP_PROXIMITY_MS\n );\n\n // Fix for issue #48: Ensure new item doesn't exceed totalDuration\n const maxAllowedDuration = totalDuration - startTime;\n const finalDuration = Math.min(newItemDuration, maxAllowedDuration);\n\n // Fix for issue #64: Verify that the new item doesn't overlap with any existing items\n const testItem: MediaItem = {\n id: 'temp',\n type,\n startTime,\n duration: finalDuration,\n trackId,\n name: '',\n isPlaceholder: true\n };\n\n // Validate and adjust position if needed\n const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n\n // Recalculate duration limit if position was adjusted\n const adjus****************ation = totalDuration - validatedStartTime;\n const adjustedDuration = Math.min(newItemDuration, adjustedMaxAllowedDuration);\n\n // Create the final non-overlapping item\n const newItem: MediaItem = {\n id: `item-${Date.now()}`,\n type,\n startTime: validatedStartTime,\n duration: adjustedDuration,\n trackId,\n name: `${type} placeholder`,\n isPlaceholder: true\n };\n\n // Set maxDuration for audio and video placeholders\n if (type === MediaType.VIDEO) {\n newItem.maxDuration = Math.min(10000, adjustedMaxAllowedDuration); // 10 seconds default for video\n } else if (type === MediaType.AUDIO) {\n newItem.maxDuration = Math.min(15000, adjustedMaxAllowedDuration); // 15 seconds default for audio\n }\n",
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}
[2025-12-22T21:48:59.469Z] [INFO] {
"type": "assistant",
"message": {
"model": "claude-opus-4-5-20251101",
"id": "msg_01J12mydJsM22i7FgxUDdg8F",
"type": "message",
"role": "assistant",
"content": [
{
"type": "tool_use",
"id": "toolu_01BRi4Ti5rn5DBdMTvqvPFNQ",
"name": "Edit",
"input": {
"file_path": "/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts",
"old_string": " // Add placeholder media item\n addMediaItem(type: MediaType, trackId: string): void {\n const currentState = this.state();\n const track = currentState.tracks.find(t => t.id === trackId);\n\n if (!track) return;",
"new_string": " // Add placeholder media item\n addMediaItem(type: MediaType, trackId: string): void {\n const currentState = this.state();\n const track = currentState.tracks.find(t => t.id === trackId);\n\n if (!track) return;\n\n // Save state before modification for undo\n this.saveStateToHistory();"
}
}
],
"stop_reason": null,
"stop_sequence": null,
"usage": {
"input_tokens": 1,
"cache_creation_input_tokens": 1267,
"cache_read_input_tokens": 61327,
"cache_creation": {
"ephemeral_5m_input_tokens": 1267,
"ephemeral_1h_input_tokens": 0
},
"output_tokens": 264,
"service_tier": "standard"
},
"context_management": null
},
"parent_tool_use_id": null,
"session_id": "c3de30fe-a5bd-49e6-8052-bb51f10fe87f",
"uuid": "77419684-17a5-472f-a5c4-7ef31a39921e"
}
[2025-12-22T21:48:59.581Z] [INFO] {
"type": "user",
"message": {
"role": "user",
"content": [
{
"tool_use_id": "toolu_01BRi4Ti5rn5DBdMTvqvPFNQ",
"type": "tool_result",
"content": "The file /tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts has been updated. Here's the result of running `cat -n` on a snippet of the edited file:\n 731→\n 732→ return markers;\n 733→ }\n 734→\n 735→ // Add placeholder media item\n 736→ addMediaItem(type: MediaType, trackId: string): void {\n 737→ const currentState = this.state();\n 738→ const track = currentState.tracks.find(t => t.id === trackId);\n 739→\n 740→ if (!track) return;\n 741→\n 742→ // Save state before modification for undo\n 743→ this.saveStateToHistory();\n 744→\n 745→ const playheadTime = currentState.playheadPosition;\n 746→ const totalDuration = currentState.totalDuration;\n 747→ const newItemDuration = type === MediaType.IMAGE ? 5000 : 3000;"
}
]
},
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"session_id": "c3de30fe-a5bd-49e6-8052-bb51f10fe87f",
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"filePath": "/tmp/gh-issue-solver-1766439852758/video-timeline/src/app/components/timeline/timeline.component.ts",
"oldString": " // Add placeholder media item\n addMediaItem(type: MediaType, trackId: string): void {\n const currentState = this.state();\n const track = currentState.tracks.find(t => t.id === trackId);\n\n if (!track) return;",
"newString": " // Add placeholder media item\n addMediaItem(type: MediaType, trackId: string): void {\n const currentState = this.state();\n const track = currentState.tracks.find(t => t.id === trackId);\n\n if (!track) return;\n\n // Save state before modification for undo\n this.saveStateToHistory();",
"originalFile": "import { Component, signal, computed, ViewChild, ElementRef, AfterViewInit, OnDestroy, effect, HostListener } from '@angular/core';\nimport { CommonModule } from '@angular/common';\nimport { MediaType, MediaItem, Track, TimelineState } from '../../models/timeline.models';\nimport { MediaLibraryComponent, MediaLibraryItem } from '../media-library/media-library.component';\nimport { Media***********onent } from '../media-toolbar/media-toolbar.component';\nimport { Notif************onent } from '../notifications/notifications.component';\nimport { Timel*************rvice } from '../../services/timeline-drag-drop.service';\nimport { PlaybackService } from '../../services/playback.service';\nimport { Timel************rvice } from '../../services/timeline-storage.service';\nimport { Timel************rvice } from '../../services/timeline-history.service';\n\n@Component({\n selector: 'app-timeline',\n standalone: true,\n imports: [CommonModule, MediaLibraryComponent, MediaToolbarComponent, NotificationsComponent],\n templateUrl: './timeline.component.html',\n styleUrl: './timeline.component.css'\n})\nexport class TimelineComponent implements AfterViewInit, OnDestroy {\n // Zoom levels: pixels per second\n private readonly MIN_ZOOM = 10;\n private readonly MAX_ZOOM = 200;\n private readonly ZOOM_STEP = 20;\n readonly TRACK_HEADER_WIDTH = 150; // Width of track header in pixels\n private readonly SNAP_PROXIMITY_MS = 500; // Snap to item if playhead is within 500ms\n private readonly MIN_ITEM_DURATION = 100; // Minimum item duration in milliseconds\n\n // Canvas dimensions for preview\n readonly PREVIEW_WIDTH = 640;\n readonly PREVIEW_HEIGHT = 360;\n\n // View references\n @ViewChild('timelineRuler') timelineRuler?: ElementRef<HTMLElement>;\n @ViewChild('notifications') notificationsComponent?: NotificationsComponent;\n @ViewChild('previewCanvas') previewCanvas?: ElementRef<HTMLCanvasElement>;\n\n // Timeline state\n readonly state = signal<TimelineState>({\n tracks: [\n { id: '1', name: 'Track 1', order: 0, items: [] },\n { id: '2', name: 'Track 2', order: 1, items: [] }\n ],\n playheadPosition: 0,\n zoomLevel: 50, // pixels per second\n totalDuration: 120000, // 120 seconds in milliseconds\n selectedItemId: null\n });\n\n // Computed values\n readonly pixel**********econd = computed(() => {\n return this.state().zoomLevel / 1000;\n });\n\n readonly timelineWidth = computed(() => {\n const state = this.state();\n // Calculate the maximum end time across all tracks\n let maxEndTime = state.totalDuration;\n\n for (const track of state.tracks) {\n for (const item of track.items) {\n const itemEndTime = item.startTime + item.duration;\n if (itemEndTime > maxEndTime) {\n maxEndTime = itemEndTime;\n }\n }\n }\n\n return maxEndTime * this.pixelsPerMillisecond();\n });\n\n readonly timelineLineHeight = computed(() => {\n const state = this.state();\n return state.tracks.length * 60 + 32;\n });\n\n readonly playheadPosition = computed(() => {\n return this.state().playheadPosition * this.pixelsPerMillisecond();\n });\n\n readonly playh************ition = computed(() => {\n return this.playheadPosition() + this.TRACK_HEADER_WIDTH;\n });\n\n // Computed: whether a media item is currently selected\n readonly hasSelectedItem = computed(() => {\n return this.state().selectedItemId !== null;\n });\n\n // Dragging state\n private draggedItem: MediaItem | null = null;\n private draggedItemOriginalTrackId: string | null = null;\n private dragOffsetTime: number = 0; // Offset in milliseconds from item start to cursor position\n private isDraggingPlayhead = false;\n private isDraggingFromRuler = false;\n private resizingItem: { item: MediaItem; edge: 'left' | 'right' } | null = null;\n private mouseDownPosition: { x: number; y: number } | null = null; // Track mouse down position for click detection\n\n // Video preview state\n readonly isPlaying = signal<boolean>(false);\n\n // Duration editor state\n readonly showDurationEditor = signal<boolean>(false);\n private editedDuration: number = 120; // Duration in seconds\n\n // Media library state\n readonly showMediaLibrary = signal<boolean>(false);\n private mediaLibraryTargetTrackId: string | null = null;\n\n // Clipboard state for copy/paste functionality\n private readonly clipboardItem = signal<MediaItem | null>(null);\n private readonly clipb************ackId = signal<string | null>(null);\n\n // Computed: whether a media item is in clipboard\n readonly hasClipboardItem = computed(() => {\n return this.clipboardItem() !== null;\n });\n\n // Computed: whether undo/redo is available\n readonly canUndo = computed(() => this.historyService.canUndo());\n readonly canRedo = computed(() => this.historyService.canRedo());\n\n // Render loop ID for cleanup\n private renderLoopId: number | null = null;\n\n constructor(\n private dragDropService: TimelineDragDropService,\n public playbackService: PlaybackService,\n private storageService: TimelineStorageService,\n private historyService: TimelineHistoryService\n ) {\n // Load saved state from LocalStorage on initialization\n const savedState = this.storageService.loadState();\n if (savedState) {\n this.state.set(savedState);\n }\n\n // Effect to sync playhead position from PlaybackService during playback\n effect(() => {\n if (this.playbackService.isPlaying()) {\n const position = this.playbackService.playheadPosition();\n this.state.update(s => ({\n ...s,\n playheadPosition: position\n }));\n }\n });\n\n // Effect to auto-save timeline state to LocalStorage on any change\n effect(() => {\n const currentState = this.state();\n this.storageService.saveState(currentState);\n });\n }\n\n ngAfterViewInit(): void {\n // Initialize canvas for preview rendering\n if (this.previewCanvas) {\n this.playbackService.setCanvas(this.previewCanvas.nativeElement);\n }\n\n // Start continuous render loop for preview (renders current frame even when paused)\n this.startRenderLoop();\n\n // Synchronize media and render initial frame if state was loaded from LocalStorage\n const currentState = this.state();\n if (currentState.tracks.length > 0) {\n this.playbackService.seek(currentState.tracks, currentState.playheadPosition);\n }\n }\n\n ngOnDestroy(): void {\n // Clean up render loop\n if (this.renderLoopId !== null) {\n cancelAnimationFrame(this.renderLoopId);\n this.renderLoopId = null;\n }\n\n // Stop playback\n this.playbackService.stop();\n }\n\n /**\n * Continuous render loop for preview canvas.\n * Keeps rendering even when paused so seeking updates the preview.\n */\n private startRenderLoop(): void {\n const render = () => {\n // Only render if we have active media and are not playing\n // (PlaybackService handles rendering during playback)\n if (!this.playbackService.isPlaying()) {\n this.playbackService.renderCurrentFrame();\n }\n this.renderLoopId = requestAnimationFrame(render);\n };\n this.renderLoopId = requestAnimationFrame(render);\n }\n\n // Track management\n addTrack(): void {\n // Save state before modification for undo\n this.saveStateToHistory();\n\n const currentState = this.state();\n const newTrack: Track = {\n id: `track-${Date.now()}`,\n name: `Track ${currentState.tracks.length + 1}`,\n order: currentState.tracks.length,\n items: []\n };\n\n this.state.update(s => ({\n ...s,\n tracks: [...s.tracks, newTrack]\n }));\n\n // Show notification for adding track\n this.notificationsComponent?.showNotification(\n `Track \"${newTrack.name}\" added.`,\n 'success'\n );\n }\n\n removeTrack(trackId: string): void {\n const currentState = this.state();\n if (currentState.tracks.length <= 1) {\n return; // Keep at least one track\n }\n\n // Save state before modification for undo\n this.saveStateToHistory();\n\n // Get track name before removing\n const trackToRemove = currentState.tracks.find(t => t.id === trackId);\n const trackName = trackToRemove?.name || 'Track';\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.filter(t => t.id !== trackId)\n }));\n\n // Show notification for removing track\n this.notificationsComponent?.showNotification(\n `Track \"${trackName}\" removed.`,\n 'info'\n );\n }\n\n // Zoom controls\n zoomIn(): void {\n this.state.update(s => ({\n ...s,\n zoomLevel: Math.min(s.zoomLevel + this.ZOOM_STEP, this.MAX_ZOOM)\n }));\n }\n\n zoomOut(): void {\n this.state.update(s => ({\n ...s,\n zoomLevel: Math.max(s.zoomLevel - this.ZOOM_STEP, this.MIN_ZOOM)\n }));\n }\n\n // Utility method to extract coordinates from mouse or touch events\n private getEventCoordinates(event: MouseEvent | TouchEvent): { clientX: number; clientY: number } {\n if (event instanceof MouseEvent) {\n return { clientX: event.clientX, clientY: event.clientY };\n } else {\n const touch = event.touches[0] || event.changedTouches[0];\n return { clientX: touch.clientX, clientY: touch.clientY };\n }\n }\n\n // Playhead controls\n onRulerPointerDown(event: MouseEvent | TouchEvent): void {\n event.preventDefault();\n this.isDraggingFromRuler = true;\n\n // Immediately update position on pointer down\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n const coords = this.getEventCoordinates(event);\n // Calculate position within the ruler element\n // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n const x = coords.clientX - rect.left;\n const newPosition = x / this.pixelsPerMillisecond();\n const currentState = this.state();\n const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n\n this.state.update(s => ({\n ...s,\n playheadPosition: clampedPosition\n }));\n\n // Sync position to playback service for seeking\n this.playbackService.seek(currentState.tracks, clampedPosition);\n }\n\n onPlayheadPointerDown(event: MouseEvent | TouchEvent): void {\n event.preventDefault();\n event.stopPropagation();\n this.isDraggingPlayhead = true;\n }\n\n\n // Media item drag and drop\n onMediaItemPointerDown(event: MouseEvent | TouchEvent, item: MediaItem, track: Track): void {\n const target = event.target as HTMLElement;\n\n // Check if clicking/touching on resize handle\n if (target.classList.contains('resize-handle')) {\n this.resizingItem = {\n item,\n edge: target.classList.contains('resize-handle-left') ? 'left' : 'right'\n };\n event.preventDefault();\n return;\n }\n\n const coords = this.getEventCoordinates(event);\n this.mouseDownPosition = { x: coords.clientX, y: coords.clientY };\n\n const mediaItemElement = event.currentTarget as HTMLElement;\n const rect = mediaItemElement.getBoundingClientRect();\n const clickX = coords.clientX - rect.left;\n\n // Convert pixel offset to time offset\n this.dragOffsetTime = clickX / this.pixelsPerMillisecond();\n\n this.draggedItem = item;\n this.draggedItemOriginalTrackId = track.id;\n event.preventDefault();\n }\n\n onTrackPointerDown(event: MouseEvent | TouchEvent): void {\n // Deselect when clicking/touching track background (not on media item)\n const target = event.target as HTMLElement;\n if (target.classList.contains('track')) {\n this.deselectMediaItem();\n }\n }\n\n onTrackPointerMove(event: MouseEvent | TouchEvent, track: Track): void {\n if (this.resizingItem) {\n this.handleResize(event, track);\n return;\n }\n event.preventDefault();\n event.stopPropagation();\n\n if (!this.draggedItem) return;\n\n const coords = this.getEventCoordinates(event);\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n const x = coords.clientX - rect.left;\n const requestedStartTime = Math.max(0, x / this.pixelsPerMillisecond() - this.dragOffsetTime);\n\n this.state.update(s => {\n const updatedTracks = s.tracks.map(t => {\n if (t.id === track.id) {\n // Get all items except the dragged one for collision detection\n const otherItems = t.items.filter(i => i.id !== this.draggedItem!.id);\n\n // Fix for issue #81: Find snap targets (playhead and items on all tracks)\n const snapTargets = this.dragDropService.findSnapTargets(\n this.draggedItem!.id,\n s.tracks,\n s.playheadPosition\n );\n\n // Calculate valid position and duration considering collisions, gap fitting, and snapping\n const validPosition = this.dragDropService.getValidDragPosition(\n this.draggedItem!,\n requestedStartTime,\n otherItems,\n s.totalDuration,\n snapTargets\n );\n\n // Check if item already exists in this track\n const itemExists = t.items.some(i => i.id === this.draggedItem!.id);\n\n if (itemExists) {\n // Update position and duration in current track\n return {\n ...t,\n items: t.items.map(i =>\n i.id === this.draggedItem!.id\n ? {\n ...i,\n startTime: validPosition.startTime,\n duration: validPosition.duration,\n trackId: track.id\n }\n : i\n )\n };\n } else {\n // Add to new track with adjusted position and duration\n return {\n ...t,\n items: [\n ...otherItems,\n {\n ...this.draggedItem!,\n startTime: validPosition.startTime,\n duration: validPosition.duration,\n trackId: track.id\n }\n ]\n };\n }\n } else if (t.id === this.draggedItemOriginalTrackId && t.id !== track.id) {\n // Remove from original track only if moving to different track\n return {\n ...t,\n items: t.items.filter(i => i.id !== this.draggedItem!.id)\n };\n }\n return t;\n });\n\n // Update the original track ID to current track for smooth dragging within same track\n this.draggedItemOriginalTrackId = track.id;\n\n return { ...s, tracks: updatedTracks };\n });\n }\n\n private handleResize(event: MouseEvent | TouchEvent, track: Track): void {\n if (!this.resizingItem) return;\n\n const coords = this.getEventCoordinates(event);\n const target = event.currentTarget as HTMLElement;\n const rect = target.getBoundingClientRect();\n // Fix for issue #83: getBoundingClientRect() returns viewport-relative coordinates,\n // and coords.clientX is also viewport-relative, so we don't need to add scrollLeft\n const x = coords.clientX - rect.left;\n const timeAtCursor = x / this.pixelsPerMillisecond();\n\n this.state.update(s => {\n // Fix for issue #87: Find snap targets for resize operations\n const snapTargets = this.dragDropService.findSnapTargets(\n this.resizingItem!.item.id,\n s.tracks,\n s.playheadPosition\n );\n\n const updatedTracks = s.tracks.map(t => {\n if (t.id === track.id) {\n // Get resize bounds considering adjacent items\n const bounds = this.dragDropService.getResizeBounds(\n this.resizingItem!.item,\n t.items,\n this.resizingItem!.edge,\n s.totalDuration\n );\n\n return {\n ...t,\n items: t.items.map(i => {\n if (i.id === this.resizingItem!.item.id) {\n if (this.resizingItem!.edge === 'left') {\n // Fix for issue #89: Handle mediaStartTime when resizing from left\n // Apply snapping to left edge (start time)\n let newStartTime = Math.max(\n bounds.minTime,\n Math.min(timeAtCursor, bounds.maxTime)\n );\n\n // Apply snapping if within snap distance\n let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n for (const target of snapTargets) {\n const distance = Math.abs(newStartTime - target);\n if (distance < minDistance) {\n minDistance = distance;\n // Only snap if within bounds\n if (target >= bounds.minTime && target <= bounds.maxTime) {\n newStartTime = target;\n }\n }\n }\n\n // Calculate how much the timeline position is changing\n const deltaTime = newStartTime - i.startTime;\n const newDuration = i.duration - deltaTime;\n\n // Update media start time (trimming from source media)\n const curre***********tTime = i.mediaStartTime || 0;\n const newMediaStartTime = curre***********tTime + deltaTime;\n\n // Check if we're trying to extend beyond the start of source media\n if (newMediaStartTime < 0) {\n // Can only extend left by curre***********tTime amount\n const maxExtension = currentMediaStartTime;\n const finalStartTime = i.startTime - maxExtension;\n const finalDuration = i.duration + maxExtension;\n\n // Ensure we don't exceed maxDuration\n if (i.maxDuration && finalDuration > i.maxDuration) {\n return {\n ...i,\n startTime: finalStartTime + (finalDuration - i.maxDuration),\n duration: i.maxDuration,\n mediaStartTime: 0\n };\n }\n\n return {\n ...i,\n startTime: finalStartTime,\n duration: finalDuration,\n mediaStartTime: 0\n };\n }\n\n // Ensure media end doesn't exceed maxDuration\n if (i.maxDuration && newMediaStartTime + newDuration > i.maxDuration) {\n const maxAllowedDuration = i.maxDuration - newMediaStartTime;\n return {\n ...i,\n startTime: i.startTime + (i.duration - maxAllowedDuration),\n duration: maxAllowedDuration,\n mediaStartTime: newMediaStartTime\n };\n }\n\n return {\n ...i,\n startTime: newStartTime,\n duration: newDuration,\n mediaStartTime: newMediaStartTime\n };\n } else {\n // Fix for issue #87: Apply snapping to right edge (end time)\n let newEndTime = Math.max(\n bounds.minTime,\n Math.min(timeAtCursor, bounds.maxTime)\n );\n\n // Apply snapping if within snap distance\n let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n for (const target of snapTargets) {\n const distance = Math.abs(newEndTime - target);\n if (distance < minDistance) {\n minDistance = distance;\n // Only snap if within bounds\n if (target >= bounds.minTime && target <= bounds.maxTime) {\n newEndTime = target;\n }\n }\n }\n\n const newDuration = newEndTime - i.startTime;\n\n // Limit duration by maxDuration if specified\n const limitedDuration = i.maxDuration\n ? Math.min(newDuration, i.maxDuration)\n : newDuration;\n\n return { ...i, duration: limitedDuration };\n }\n }\n return i;\n })\n };\n }\n return t;\n });\n\n return { ...s, tracks: updatedTracks };\n });\n }\n\n onPointerUp(event: MouseEvent | TouchEvent): void {\n // Detect if this was a click/tap (not a drag) on a media item\n if (this.draggedItem && this.mouseDownPosition) {\n const coords = this.getEventCoordinates(event);\n const dx = coords.clientX - this.mouseDownPosition.x;\n const dy = coords.clientY - this.mouseDownPosition.y;\n const distance = Math.sqrt(dx * dx + dy * dy);\n\n // If pointer moved less than 5 pixels, consider it a click/tap\n if (distance < 5) {\n this.selectMediaItem(this.draggedItem.id);\n }\n }\n\n this.draggedItem = null;\n this.draggedItemOriginalTrackId = null;\n this.dragOffsetTime = 0;\n this.isDraggingPlayhead = false;\n this.isDraggingFromRuler = false;\n this.resizingItem = null;\n this.mouseDownPosition = null;\n }\n\n onDocumentPointerMove(event: MouseEvent | TouchEvent): void {\n if (this.isDraggingPlayhead || this.isDraggingFromRuler) {\n // Fix for issue #50: Use ViewChild reference to ensure we use the exact same element as onRulerPointerDown\n if (!this.timelineRuler) {\n return;\n }\n\n const coords = this.getEventCoordinates(event);\n const rulerElement = this.timelineRuler.nativeElement;\n // Use the same calculation as onRulerPointerDown\n // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n const rect = rulerElement.getBoundingClientRect();\n const x = coords.clientX - rect.left;\n const newPosition = x / this.pixelsPerMillisecond();\n const currentState = this.state();\n const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n\n this.state.update(s => ({\n ...s,\n playheadPosition: clampedPosition\n }));\n\n // Sync position to playback service for seeking (but don't call too frequently during drag)\n this.playbackService.seek(currentState.tracks, clampedPosition);\n }\n\n // Fix for issue #96: Handle media item dragging and resizing at document level for touch events\n // This allows dragging between tracks on mobile devices\n if (event instanceof TouchEvent) {\n if (this.draggedItem) {\n // Find which track the touch is currently over\n const targetTrack = this.findTrackAtCoordinates(this.getEventCoordinates(event));\n if (targetTrack) {\n // Reuse existing drag logic\n this.onTrackPointerMove(event, targetTrack);\n }\n } else if (this.resizingItem) {\n // Find the track that contains the resizing item\n const targetTrack = this.findTrackContainingItem(this.resizingItem.item.id);\n if (targetTrack) {\n // Reuse existing resize logic\n this.handleResize(event, targetTrack);\n }\n }\n }\n }\n\n // Helper method to find which track is at the given Y coordinate\n private findTrackAtCoordinates(coords: { clientX: number; clientY: number }): Track | null {\n const trackElements = document.querySelectorAll('.track');\n for (const trackElement of Array.from(trackElements)) {\n const rect = trackElement.getBoundingClientRect();\n if (coords.clientY >= rect.top && coords.clientY <= rect.bottom) {\n const trackIndex = Array.from(trackElements).indexOf(trackElement);\n const tracks = this.state().tracks;\n if (trackIndex >= 0 && trackIndex < tracks.length) {\n return tracks[trackIndex];\n }\n }\n }\n return null;\n }\n\n // Helper method to find the track containing a specific item\n private findTrackContainingItem(itemId: string): Track | null {\n const currentState = this.state();\n for (const track of currentState.tracks) {\n if (track.items.some(item => item.id === itemId)) {\n return track;\n }\n }\n return null;\n }\n\n // Helper methods\n getItemStyle(item: MediaItem) {\n return {\n left: `${item.startTime * this.pixelsPerMillisecond()}px`,\n width: `${item.duration * this.pixelsPerMillisecond()}px`\n };\n }\n\n getMediaTypeClass(type: MediaType): string {\n return `media-${type}`;\n }\n\n formatTime(milliseconds: number): string {\n const seconds = Math.floor(milliseconds / 1000);\n const minutes = Math.floor(seconds / 60);\n const remainingSeconds = seconds % 60;\n const cs = Math.floor((milliseconds % 1000) / 10);\n return `${minutes}:${remainingSeconds.toString().padStart(2, '0')}.${cs.toString().padStart(2, '0')}`;\n }\n\n /**\n * Calculate appropriate time interval for markers based on zoom level\n * to prevent marker labels from overlapping\n */\n private getMarkerInterval(): number {\n // Minimum spacing between markers in pixels to prevent overlap\n // Enough space for \"0:00.000\" text (about 50-60px)\n const MIN_M***********NG_PX = 60;\n\n // Calculate how much time represents MIN_M***********NG_PX at current zoom\n const pixelsPerMs = this.pixelsPerMillisecond();\n const minTimeSpacing = MIN_M***********NG_PX / pixelsPerMs;\n\n // Define possible intervals (in ms): 100ms, 250ms, 500ms, 1s, 2s, 5s, 10s, 30s, 60s\n const intervals = [100, 250, 500, 1000, 2000, 5000, 10000, 30000, 60000];\n\n // Find the smallest interval that's larger than or equal to minTimeSpacing\n for (const interval of intervals) {\n if (interval >= minTimeSpacing) {\n return interval;\n }\n }\n\n // If even 60s is too small, use larger intervals\n return Math.ceil(minTimeSpacing / 60000) * 60000;\n }\n\n getTimeMarkers(): { position: number; label: string }[] {\n const markers: { position: number; label: string }[] = [];\n const stepMs = this.getMarkerInterval(); // Dynamic interval based on zoom level\n\n // Fix for issue #85: Do not show the last time mark at totalDuration\n // to prevent container expansion from the text label\n for (let time = 0; time < this.state().totalDuration; time += stepMs) {\n markers.push({\n position: time * this.pixelsPerMillisecond(),\n label: this.formatTime(time)\n });\n }\n\n return markers;\n }\n\n // Add placeholder media item\n addMediaItem(type: MediaType, trackId: string): void {\n const currentState = this.state();\n const track = currentState.tracks.find(t => t.id === trackId);\n\n if (!track) return;\n\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n const newItemDuration = type === MediaType.IMAGE ? 5000 : 3000;\n\n // Determine the start time for the new item using the service\n const startTime = this.dragDropService.calculateNewItemStartTime(\n playheadTime,\n track.items,\n this.SNAP_PROXIMITY_MS\n );\n\n // Fix for issue #48: Ensure new item doesn't exceed totalDuration\n const maxAllowedDuration = totalDuration - startTime;\n const finalDuration = Math.min(newItemDuration, maxAllowedDuration);\n\n // Fix for issue #64: Verify that the new item doesn't overlap with any existing items\n const testItem: MediaItem = {\n id: 'temp',\n type,\n startTime,\n duration: finalDuration,\n trackId,\n name: '',\n isPlaceholder: true\n };\n\n // Validate and adjust position if needed\n const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n\n // Recalculate duration limit if position was adjusted\n const adjus****************ation = totalDuration - validatedStartTime;\n const adjustedDuration = Math.min(newItemDuration, adjustedMaxAllowedDuration);\n\n // Create the final non-overlapping item\n const newItem: MediaItem = {\n id: `item-${Date.now()}`,\n type,\n startTime: validatedStartTime,\n duration: adjustedDuration,\n trackId,\n name: `${type} placeholder`,\n isPlaceholder: true\n };\n\n // Set maxDuration for audio and video placeholders\n if (type === MediaType.VIDEO) {\n newItem.maxDuration = Math.min(10000, adjustedMaxAllowedDuration); // 10 seconds default for video\n } else if (type === MediaType.AUDIO) {\n newItem.maxDuration = Math.min(15000, adjustedMaxAllowedDuration); // 15 seconds default for audio\n }\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === trackId\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n // Show notification for adding media\n this.notificationsComponent?.showNotification(\n 'Media added to timeline.',\n 'success'\n );\n }\n\n removeMediaItem(itemId: string, trackId: string): void {\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === trackId\n ? { ...t, items: t.items.filter(i => i.id !== itemId) }\n : t\n ),\n // Deselect if removing selected item\n selectedItemId: s.selectedItemId === itemId ? null : s.selectedItemId\n }));\n\n // Show notification for removing media\n this.notificationsComponent?.showNotification(\n 'Media removed from timeline.',\n 'info'\n );\n }\n\n // Media selection\n selectMediaItem(itemId: string): void {\n this.state.update(s => ({\n ...s,\n selectedItemId: itemId\n }));\n }\n\n deselectMediaItem(): void {\n this.state.update(s => ({\n ...s,\n selectedItemId: null\n }));\n }\n\n isItemSelected(itemId: string): boolean {\n return this.state().selectedItemId === itemId;\n }\n\n readonly MediaType = MediaType;\n\n /**\n * Create a new project by clearing the timeline and LocalStorage\n */\n newProject(): void {\n // Stop playback if playing\n if (this.playbackService.isPlaying()) {\n this.playbackService.stop();\n this.isPlaying.set(false);\n }\n\n // Reset timeline state to initial values\n this.state.set({\n tracks: [\n { id: '1', name: 'Track 1', order: 0, items: [] },\n { id: '2', name: 'Track 2', order: 1, items: [] }\n ],\n playheadPosition: 0,\n zoomLevel: 50,\n totalDuration: 120000,\n selectedItemId: null\n });\n\n // Clear LocalStorage\n this.storageService.clearState();\n\n // Show notification\n this.notificationsComponent?.showNotification(\n 'New project created. Timeline cleared.',\n 'success'\n );\n\n // Clear undo/redo history when creating a new project\n this.historyService.clearHistory();\n }\n\n /**\n * Push current state to history before making a change.\n * Should be called at the start of any operation that modifies the timeline.\n */\n private saveStateToHistory(): void {\n this.historyService.pushState(this.state());\n }\n\n /**\n * Undo the last action.\n * Restores the previous timeline state.\n */\n undo(): void {\n const previousState = this.historyService.undo(this.state());\n if (previousState) {\n this.state.set(previousState);\n\n // Sync playback service with new state\n this.playbackService.seek(previousState.tracks, previousState.playheadPosition);\n\n this.notificationsComponent?.showNotification('Undo successful.', 'info');\n }\n }\n\n /**\n * Redo the last undone action.\n * Restores the next timeline state.\n */\n redo(): void {\n const nextState = this.historyService.redo(this.state());\n if (nextState) {\n this.state.set(nextState);\n\n // Sync playback service with new state\n this.playbackService.seek(nextState.tracks, nextState.playheadPosition);\n\n this.notificationsComponent?.showNotification('Redo successful.', 'info');\n }\n }\n\n /**\n * Handle keyboard shortcuts for undo/redo.\n */\n @HostListener('document:keydown', ['$event'])\n handleKeyboardShortcuts(event: KeyboardEvent): void {\n // Skip if user is typing in an input field\n const target = event.target as HTMLElement;\n if (target.tagName === 'INPUT' || target.tagName === 'TEXTAREA') {\n return;\n }\n\n // Ctrl+Z or Cmd+Z for undo\n if ((event.ctrlKey || event.metaKey) && event.key === 'z' && !event.shiftKey) {\n event.preventDefault();\n this.undo();\n }\n\n // Ctrl+Y or Cmd+Shift+Z for redo\n if ((event.ctrlKey || event.metaKey) && (event.key === 'y' || (event.key === 'z' && event.shiftKey))) {\n event.preventDefault();\n this.redo();\n }\n }\n\n // Video preview controls\n togglePlayback(): void {\n const currentState = this.state();\n\n if (this.playbackService.isPlaying()) {\n this.playbackService.pause();\n this.isPlaying.set(false);\n } else {\n // Sync playhead position to PlaybackService before starting\n this.playbackService.setPlayheadPosition(currentState.playheadPosition);\n this.playbackService.play(currentState.tracks, currentState.totalDuration);\n this.isPlaying.set(true);\n }\n }\n\n skipBackward(): void {\n const currentState = this.state();\n const newPosition = Math.max(0, currentState.playheadPosition - 5000);\n\n this.state.update(s => ({\n ...s,\n playheadPosition: newPosition\n }));\n\n // Sync position and update media\n this.playbackService.seek(currentState.tracks, newPosition);\n }\n\n skipForward(): void {\n const currentState = this.state();\n const newPosition = Math.min(currentState.totalDuration, currentState.playheadPosition + 5000);\n\n this.state.update(s => ({\n ...s,\n playheadPosition: newPosition\n }));\n\n // Sync position and update media\n this.playbackService.seek(currentState.tracks, newPosition);\n }\n\n // Duration editor methods\n openDurationEditor(): void {\n this.editedDuration = this.state().totalDuration / 1000;\n this.showDurationEditor.set(true);\n }\n\n closeDurationEditor(): void {\n this.showDurationEditor.set(false);\n }\n\n onDurationInputChange(event: Event): void {\n const input = event.target as HTMLInputElement;\n const value = parseFloat(input.value);\n if (!isNaN(value) && value > 0) {\n this.editedDuration = value;\n }\n }\n\n saveDuration(): void {\n const newDurationMs = Math.max(1000, this.editedDuration * 1000); // At least 1 second\n this.state.update(s => ({\n ...s,\n totalDuration: newDurationMs,\n // Ensure playhead doesn't exceed new duration\n playheadPosition: Math.min(s.playheadPosition, newDurationMs)\n }));\n this.closeDurationEditor();\n }\n\n // Media library methods\n openMediaLibrary(trackId: string): void {\n this.mediaLibraryTargetTrackId = trackId;\n this.showMediaLibrary.set(true);\n }\n\n closeMediaLibrary(): void {\n this.showMediaLibrary.set(false);\n this.mediaLibraryTargetTrackId = null;\n }\n\n onMediaSelected(media: MediaLibraryItem): void {\n if (!this.mediaLibraryTargetTrackId) return;\n\n const currentState = this.state();\n const track = currentState.tracks.find(t => t.id === this.mediaLibraryTargetTrackId);\n\n if (!track) return;\n\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n\n // Determine the start time for the new item using the service\n const startTime = this.dragDropService.calculateNewItemStartTime(\n playheadTime,\n track.items,\n this.SNAP_PROXIMITY_MS\n );\n\n // Ensure item doesn't exceed totalDuration\n const maxAllowedDuration = totalDuration - startTime;\n const finalDuration = Math.min(media.duration, maxAllowedDuration);\n\n // Verify that the new item doesn't overlap with any existing items\n const testItem: MediaItem = {\n id: 'temp',\n type: media.type,\n startTime,\n duration: finalDuration,\n trackId: this.mediaLibraryTargetTrackId,\n name: '',\n isPlaceholder: false\n };\n\n // Validate and adjust position if needed\n const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n\n // Recalculate duration limit if position was adjusted\n const adjus****************ation = totalDuration - validatedStartTime;\n const adjustedDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n\n // Create the final non-overlapping item\n const newItem: MediaItem = {\n id: `item-${Date.now()}`,\n type: media.type,\n startTime: validatedStartTime,\n duration: adjustedDuration,\n trackId: this.mediaLibraryTargetTrackId,\n name: media.name,\n url: media.url, // Pass URL from media library for playback\n isPlaceholder: false\n };\n\n // Set maxDuration for audio and video\n if (media.type === MediaType.VIDEO) {\n newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n } else if (media.type === MediaType.AUDIO) {\n newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n }\n\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === this.mediaLibraryTargetTrackId\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n // Show notification for adding media\n this.notificationsComponent?.showNotification(\n `\"${media.name}\" added to timeline.`,\n 'success'\n );\n\n // Close the media library after selection\n this.closeMediaLibrary();\n }\n\n /**\n * Trim (split) the selected media item at the playhead position.\n * Creates two separate items from the original media.\n */\n trimSelectedMedia(): void {\n const currentState = this.state();\n const selectedItemId = currentState.selectedItemId;\n\n if (!selectedItemId) {\n return;\n }\n\n // Find the selected item and its track\n let selectedItem: MediaItem | null = null;\n let selectedTrack: Track | null = null;\n\n for (const track of currentState.tracks) {\n const item = track.items.find(i => i.id === selectedItemId);\n if (item) {\n selectedItem = item;\n selectedTrack = track;\n break;\n }\n }\n\n if (!selectedItem || !selectedTrack) {\n return;\n }\n\n const playheadTime = currentState.playheadPosition;\n const itemStart = selectedItem.startTime;\n const itemEnd = itemStart + selectedItem.duration;\n\n // Check if playhead is within the selected media item\n if (playheadTime <= itemStart || playheadTime >= itemEnd) {\n // Playhead is not within the selected media - show notification\n this.notificationsComponent?.showNotification(\n 'Position the playhead within the selected media to trim it.',\n 'warning'\n );\n return;\n }\n\n // Ensure both parts will have at least MIN_ITEM_DURATION\n const firstPartDuration = playheadTime - itemStart;\n const secondPartDuration = itemEnd - playheadTime;\n\n if (firstPartDuration < this.MIN_ITEM_DURATION || secondPartDuration < this.MIN_ITEM_DURATION) {\n this.notificationsComponent?.showNotification(\n 'Cannot trim: resulting parts would be too short.',\n 'warning'\n );\n return;\n }\n\n // Calculate mediaStartTime adjustments\n const origi************tTime = selectedItem.mediaStartTime || 0;\n const secon**************tTime = origi************tTime + firstPartDuration;\n\n // Create two new items from the original\n const firstPart: MediaItem = {\n ...selectedItem,\n id: `item-${Date.now()}-1`,\n duration: firstPartDuration\n // mediaStartTime stays the same for first part\n };\n\n const secondPart: MediaItem = {\n ...selectedItem,\n id: `item-${Date.now()}-2`,\n startTime: playheadTime,\n duration: secondPartDuration,\n mediaStartTime: secondPartMediaStartTime\n };\n\n // Update the state: remove original, add two new parts\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t => {\n if (t.id === selectedTrack!.id) {\n return {\n ...t,\n items: [\n ...t.items.filter(i => i.id !== selectedItemId),\n firstPart,\n secondPart\n ]\n };\n }\n return t;\n }),\n // Deselect after trimming\n selectedItemId: null\n }));\n\n this.notificationsComponent?.showNotification(\n 'Media trimmed successfully.',\n 'success'\n );\n }\n\n /**\n * Copy the selected media item to the clipboard.\n * Stores a copy of the item and the track it was copied from.\n */\n copySelectedMedia(): void {\n const currentState = this.state();\n const selectedItemId = currentState.selectedItemId;\n\n if (!selectedItemId) {\n return;\n }\n\n // Find the selected item and its track\n let selectedItem: MediaItem | null = null;\n let selectedTrackId: string | null = null;\n\n for (const track of currentState.tracks) {\n const item = track.items.find(i => i.id === selectedItemId);\n if (item) {\n selectedItem = item;\n selectedTrackId = track.id;\n break;\n }\n }\n\n if (!selectedItem || !selectedTrackId) {\n return;\n }\n\n // Store a copy of the item in clipboard\n this.clipboardItem.set({ ...selectedItem });\n this.clipboardSourceTrackId.set(selectedTrackId);\n\n this.notificationsComponent?.showNotification(\n 'Media copied to clipboard.',\n 'success'\n );\n }\n\n /**\n * Paste the clipboard media item at the playhead position.\n * Pastes on the same track where the item was copied from.\n * If there's no space at playhead position, finds the next available slot.\n */\n pasteMedia(): void {\n const copiedItem = this.clipboardItem();\n const sourceTrackId = this.clipboardSourceTrackId();\n\n if (!copiedItem || !sourceTrackId) {\n return;\n }\n\n const currentState = this.state();\n const playheadTime = currentState.playheadPosition;\n const totalDuration = currentState.totalDuration;\n\n // Find the source track\n let targetTrack = currentState.tracks.find(t => t.id === sourceTrackId);\n\n // If source track no longer exists, use the first track\n if (!targetTrack) {\n targetTrack = currentState.tracks[0];\n if (!targetTrack) {\n this.notificationsComponent?.showNotification(\n 'No tracks available to paste media.',\n 'error'\n );\n return;\n }\n }\n\n const itemDuration = copiedItem.duration;\n\n // Try to find a valid position starting from playhead\n const pastePosition = this.findPastePosition(\n playheadTime,\n itemDuration,\n targetTrack.items,\n totalDuration\n );\n\n if (pastePosition === null) {\n this.notificationsComponent?.showNotification(\n 'No space available to paste media on this track.',\n 'warning'\n );\n return;\n }\n\n // Create a new item with a new ID\n const newItem: MediaItem = {\n ...copiedItem,\n id: `item-${Date.now()}`,\n startTime: pastePosition,\n trackId: targetTrack.id\n };\n\n // Add the new item to the track\n this.state.update(s => ({\n ...s,\n tracks: s.tracks.map(t =>\n t.id === targetTrack!.id\n ? { ...t, items: [...t.items, newItem] }\n : t\n )\n }));\n\n this.notificationsComponent?.showNotification(\n 'Media pasted successfully.',\n 'success'\n );\n }\n\n /**\n * Find a valid position to paste media item.\n * First tries at the playhead position, then finds the next available gap.\n */\n private findPastePosition(\n preferredPosition: number,\n duration: number,\n existingItems: MediaItem[],\n totalDuration: number\n ): number | null {\n // Check if we can fit at the preferred position (playhead)\n if (this.canFitAtPosition(preferredPosition, duration, existingItems, totalDuration)) {\n return preferredPosition;\n }\n\n // Sort existing items by start time\n const sortedItems = [...existingItems].sort((a, b) => a.startTime - b.startTime);\n\n // Find all gaps on the track and try to place the item\n const gaps = this.dragDropService.findAllGaps(sortedItems);\n\n // First, try to find a gap that starts at or after the playhead\n for (const gap of gaps) {\n // Calculate actual gap size (considering totalDuration for infinite gaps)\n const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n const gapSize = effectiveGapEnd - gap.gapStart;\n\n if (gap.gapStart >= preferredPosition && gapSize >= duration) {\n return gap.gapStart;\n }\n }\n\n // If no gap after playhead, try any gap that can fit the item\n for (const gap of gaps) {\n // Calculate actual gap size (considering totalDuration for infinite gaps)\n const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n const gapSize = effectiveGapEnd - gap.gapStart;\n\n if (gapSize >= duration) {\n return gap.gapStart;\n }\n }\n\n // No suitable position found\n return null;\n }\n\n /**\n * Check if an item can fit at a specific position without overlapping.\n */\n private canFitAtPosition(\n position: number,\n durat
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