VSCode-test-project

gistfile1.txt

{
  "name": "desktop-tester",
  "displayName": "Desktop-tester",
  "description": "",
  "version": "0.0.1",
  "engines": {
    "vscode": "^1.92.0"
  },
  "categories": [
    "Other"
  ],
  "activationEvents": [
    "onLanguage:plaintext" 
  ],
  "main": "./out/extension.js",
  "contributes": {
    "commands": [
      {
        "command": "desktop-tester.helloWorld",
        "title": "Hello World"
      }
    ],
    "configuration": {
      "type": "object",
      "title": "Desktop Tester Settings",
      "properties": {
        "desktopTester.wordsToHighlight": {
          "type": "array",
          "default": ["example"],
          "description": "List of words to highlight in the editor."
        }
      }
    }
  },
  "scripts": {
    "vscode:prepublish": "npm run compile",
    "compile": "tsc -p ./",
    "watch": "tsc -watch -p ./",
    "pretest": "npm run compile && npm run lint",
    "lint": "eslint src --ext ts",
    "test": "vscode-test"
  },
  "devDependencies": {
    "@types/vscode": "^1.92.0",
    "@types/mocha": "^10.0.7",
    "@types/node": "20.x",
    "@typescript-eslint/eslint-plugin": "^7.14.1",
    "@typescript-eslint/parser": "^7.11.0",
    "eslint": "^8.57.0",
    "typescript": "^5.4.5",
    "@vscode/test-cli": "^0.0.9",
    "@vscode/test-electron": "^2.4.0"
  }
}

import * as vscode from "vscode";

export function activate(context: vscode.ExtensionContext) {
  let decorationType = vscode.window.createTextEditorDecorationType({
    backgroundColor: "yellow",
  });

  const wordsToHighlight = ["example", "test", "highlight"]; // Hardcoded words to highlight
  const regex = new RegExp(`\\b(${wordsToHighlight.join("|")})\\b`, "gi");

  const updateDecorations = () => {
    const editor = vscode.window.activeTextEditor;
    if (!editor) return;

    const text = editor.document.getText();
    const decorations: vscode.DecorationOptions[] = [];

    let match;
    while ((match = regex.exec(text))) {
      const startPos = editor.document.positionAt(match.index);
      const endPos = editor.document.positionAt(match.index + match[0].length);
      const decoration = { range: new vscode.Range(startPos, endPos) };
      decorations.push(decoration);
    }
    editor.setDecorations(decorationType, decorations);
  };

  context.subscriptions.push(
    vscode.window.onDidChangeActiveTextEditor(updateDecorations),
    vscode.workspace.onDidChangeTextDocument((event) => {
      if (vscode.window.activeTextEditor && event.document === vscode.window.activeTextEditor.document) {
        updateDecorations();
      }
    })
  );

  updateDecorations(); // Initial call to update decorations on activation
}