Plugin that keeps track of which files have been recently closed, as well as files that have been recently accessed. The plugin can be used to simply open the last file you closed or can be used to display a quick panel with a list of recently accessed f

open_recently_closed_file.py

'''
@author Josh Bjornson

This work is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License.
To view a copy of this license, visit http://creativecommons.org/licenses/by-sa/3.0/
or send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA.
'''
# Plugin to provide access to the history of accessed files:
# https://gist.github.com/1133602
#
# The plugin stores a JSON file with the file history.
#
# Note: I tried checking for file existence in the history but this
# took more time than expected (especially with networked files) and
# made the plugin quite unresponsive.  The compromise is a command
# to cleanup the current project (with the option to clean up the
# global list as well).  The cleanup will remove any files in the
# project history that don't exist.
#
# To run the plugin:
# view.run_command("open_recently_closed_file")
# view.run_command("cleanup_file_history")
#
# Keymap entries:
# { "keys": ["ctrl+shift+t"], "command": "open_recently_closed_file"},
# { "keys": ["ctrl+alt+shift+t"], "command": "open_recently_closed_file", "args": {"show_quick_panel": false}  },
# { "keys": ["ctrl+alt+shift+t"], "command": "open_recently_closed_file", "args": {"current_project_only": false}  },
# { "keys": ["ctrl+alt+shift+c"], "command": "cleanup_file_history", "args": {"current_project_only": false}  },
#
# TODO use api function (not yet available) to get the project name/id (rather than using a hash of the project folders)
# TODO Get the settings below from a sublime-settings file?

import sublime
import sublime_plugin
import os
import hashlib
import json

# Maximum number of history entries we should keep (older entries truncated)
GLOBAL_MAX_ENTRIES = 100
PROJECT_MAX_ENTRIES = 50

# Which position to open a file at when the saved index in no longer valid
# (e.g. after a migration or if the saved index is non-existent).
# Options are: next tab and last tab
(TAB_POSITION_NEXT, TAB_POSITION_LAST) = ('next', 'last')
DEFAULT_NEW_TAB_POSITION = TAB_POSITION_NEXT

# Print out the debug text?
PRINT_DEBUG = False

# Should we show a preview of the history entries?
SHOW_FILE_PREVIEW = True

# Helper methods for "logging" to the console.
def debug(text):
    if PRINT_DEBUG:
        log(text)


def log(text):
    print('[%s] %s' % ('FileHistory', text))


# Class to read and write the file-access history.
class FileHistory(object):
    _instance = None

    """Basic singleton implementation"""
    @classmethod
    def instance(cls):
        if not cls._instance:
            cls._instance = cls()
        return cls._instance

    """Class to manage the file-access history"""
    def __init__(self):
        self.history_file = os.path.join(sublime.packages_path(), 'User', 'FileHistory.json')

        self.history = {}
        self.__load_history()

        self.calling_view = None

    def get_current_project_key(self):
        m = hashlib.md5()
        for path in sublime.active_window().folders():
            m.update(path.encode('utf-8'))
        project_key = m.hexdigest()

        # Try to use project_file_name (available in ST3 build 3014)
        # Note: Although it would be more appropriate, the name of the workspace is not available
        if hasattr(sublime.active_window(), 'project_file_name'):
            project_filename = sublime.active_window().project_file_name()
            if not project_filename:
                return project_key

            # migrate the old history entry (if it exists)
            if project_key in self.history:
                self.history[project_filename] = self.history[project_key]
                del(self.history[project_key])

            # use the new project key
            project_key = project_filename

        return project_key

    def __load_history(self):
        debug('Loading the history from file ' + self.history_file)
        if not os.path.exists(self.history_file):
            return

        f = open(self.history_file, 'r')
        try:
            updated_history = json.load(f)
        finally:
            f.close()

        self.history = updated_history

    def __save_history(self):
        debug('Saving the history to file ' + self.history_file)
        f = open(self.history_file, mode='w+')
        try:
            json.dump(self.history, f, indent=4)
            f.flush()
        finally:
            f.close()

    def get_history(self, current_project_only=True):
        """Return the requested history (global or project-specific): opened files followed by closed files"""

        # Make sure the history is loaded
        if len(self.history) == 0:
            self.__load_history()

        # Load the requested history (global or project-specific)
        if current_project_only:
            project_name = self.get_current_project_key()
        else:
            project_name = 'global'

        # Return the list of closed and opened files
        if project_name in self.history:
            return self.history[project_name]['closed'] + self.history[project_name]['opened']
        else:
            debug('WARN: Project %s could not be found in the file history list - returning an empty history list' % (project_name))
            return []

    def __ensure_project(self, project_name):
        """Make sure the project nodes exist (including 'opened' and 'closed')"""
        if project_name not in self.history:
            self.history[project_name] = {}
            self.history[project_name]['opened'] = []
            self.history[project_name]['closed'] = []

    def add_view(self, view, history_type):
        # Get the file details from the view
        filename = os.path.normpath(view.file_name()) if view.file_name() else None
        # Only keep track of files that exist (that have already been saved)
        if filename != None:
            project_name = self.get_current_project_key()
            (group, index) = sublime.active_window().get_view_index(view)

            if os.path.exists(filename):
                # Add to both the project-specific and global histories
                self.__add_to_history(project_name, history_type, filename, group, index)
                self.__add_to_history('global', history_type, filename, group, index)
            else:
                # If the file doesn't exist then remove it from the lists
                debug('The file no longer exists, so it has been removed from the history: ' + filename)
                self.__remove(project_name, filename)
                self.__remove('global', filename)

            self.__save_history()

    def __add_to_history(self, project_name, history_type, filename, group, index):
        debug('Adding %s file to project %s with group %s and index %s: %s' % (history_type, project_name, group, index, filename))

        # Make sure the project nodes exist
        self.__ensure_project(project_name)

        # Remove the file from the project list then
        # add it to the top (of the opened/closed list)
        self.__remove(project_name, filename)
        node = {'filename': filename, 'group':group, 'index':index}
        self.history[project_name][history_type].insert(0, node)

        # Make sure we limit the number of history entries
        max_num_entries = GLOBAL_MAX_ENTRIES if project_name == 'global' else PROJECT_MAX_ENTRIES
        self.history[project_name][history_type] = self.history[project_name][history_type][0:max_num_entries]

    def __remove(self, project_name, filename):
        # Only continue if this project exists
        if project_name not in self.history:
            return

        # Remove any references to this file from the project
        for history_type in ('opened', 'closed'):
            for node in iter(self.history[project_name][history_type]):
                if node['filename'] == filename:
                    self.history[project_name][history_type].remove(node)

    def clean_history(self, project_name):
        # Only continue if this project exists
        if project_name not in self.history:
            sublime.status_message("This project does not have any history")
            return

        # Remove any non-existent files from the project
        for history_type in ('opened', 'closed'):
            for node in reversed(self.history[project_name][history_type]):
                if not os.path.exists(node['filename']):
                    debug('Removing non-existent file from the project: %s' % (node['filename']))
                    self.history[project_name][history_type].remove(node)

        self.__save_history()
        sublime.status_message("File history cleaned")


class OpenRecentlyClosedFileEvent(sublime_plugin.EventListener):
    """class to keep a history of the files that have been opened and closed"""

    def on_close(self, view):
        FileHistory.instance().add_view(view, 'closed')

    def on_load(self, view):
        window = sublime.active_window()

        # If this view is being previewed (transient), then don't trigger the file history event
        add_to_history = True
        if hasattr(window, 'transient_view_in_group'):
            if view == window.transient_view_in_group(window.active_group()):
                add_to_history = False

        if add_to_history:
            FileHistory.instance().add_view(view, 'opened')


class CleanupFileHistoryCommand(sublime_plugin.WindowCommand):
    def run(self, current_project_only=True):
        # Cleanup the current project
        h = FileHistory.instance()
        h.clean_history(h.get_current_project_key())

        # If requested, also cleanup the global history
        if not current_project_only:
            h.clean_history('global')


class OpenRecentlyClosedFileCommand(sublime_plugin.WindowCommand):
    """class to either open the last closed file or show a quick panel with the recent file history (closed files first)"""

    def run(self, show_quick_panel=True, current_project_only=True):
        # Remember the view that the command was run from (aka the "calling" view), so:
        # (1) we can return to the "calling" view if the user cancels
        # (2) we can show something if a file in the history no longer exists
        FileHistory.instance().calling_view = sublime.active_window().active_view()

        # Prepare the display list with the file name and path separated
        self.history_list = FileHistory.instance().get_history(current_project_only)
        display_list = []
        for node in self.history_list:
            file_path = node['filename']
            display_list.append([os.path.basename(file_path), os.path.dirname(file_path)])

        if show_quick_panel:
            # The new ST3 API supports an "on_highlight" function in the "show_quick_panel" call
            if int(sublime.version()) >= 3000:
                self.window.show_quick_panel(display_list, self.open_file, on_highlight=self.show_preview)
            else:
                self.window.show_quick_panel(display_list, self.open_file)
        else:
            self.open_file(0)


    def is_valid(self, selected_index):
        return selected_index >= 0 and selected_index < len(self.history_list)


    # Note: This function will never be called in ST2
    def show_preview(self, selected_index):
        if not SHOW_FILE_PREVIEW:
            return
        if self.is_valid(selected_index):
            # Preview the file if it exists, otherwise show the previous view (aka the "calling_view")
            node = self.history_list[selected_index]
            if os.path.exists(node['filename']):
                self.window.open_file(node['filename'], sublime.TRANSIENT)
            else:
                sublime.active_window().focus_view( FileHistory.instance().calling_view )


    def open_file(self, selected_index):
        if self.is_valid(selected_index):
            node = self.history_list[selected_index]

            # Get the group of the new view (the currently active group is the default)
            group = node['group']
            if group < 0 or group >= self.window.num_groups():
                group = self.window.active_group()

            # Get the alternative tab index (in case the saved index in no longer valid):
            # The file could be opened in the last tab (max_index) or after the current tab (next_index)...
            max_index = len(self.window.views_in_group(group))
            if max_index:
                next_index = self.window.get_view_index(self.window.active_view_in_group(group))[1] + 1
            else:
                next_index = 0

            # Get the index of the new view
            index = node['index']
            if index < 0 or index > max_index:
                index = next_index if DEFAULT_NEW_TAB_POSITION == TAB_POSITION_NEXT else max_index

            debug('Opening file in group %s, index %s (based on saved group %s, index %s): %s' % (group, index, node['group'], node['index'], node['filename']))

            # Open the file and position the view correctly
            new_view = self.window.open_file(node['filename'])
            self.window.set_view_index(new_view, group, index)

            # Add the file we just opened to the FileHistory
            FileHistory.instance().add_view(new_view, 'opened')
        else:
            # The user cancelled the action - give the focus back to the "calling" view
            sublime.active_window().focus_view( FileHistory.instance().calling_view )
            FileHistory.instance().calling_view = None

In the meantime ...

I had to modify the plugin so it worked for me. See changes in my fork (if you can).
In detail:
#239: project_name = get_current_project_hash() is not defined. Well, I made it into a @staticmethod and used FileHistory.get_current_project_hash() while disconsidering your whole style of programming and noticing the "global" instance of FileHistory later. Well, I fixed it ;)
#86: f = open(self.history_file, 'r') this fails when you don't have a history file (like I did). I wrapped a try: ... except: IOError around it and returned.

~: Some PEP 8 adaptions.

Thanks for the corrections. I made some changes to the code to resolve the issues.

I'm pretty new to python. To be honest I only learned it to be able to make plugins for SublimeText. Is there a better way of sharing the one instance of the class between the three plugin classes (as opposed to making it global)?

I'll look into your source and structure later today when I check whether gists are possible in PackageControl.

Tbh I leant Python for exactly the same purpose which was like 2 weeks ago.

Package Control works in a way that only supports zip archives to be downloaded (I checked the source). Gist seems to provide only .tar.gz downloads so it won't work, I'm afraik.

I suppose you can read github repos (online) since this is only plain HTTP and I will link the repo here and add you as contributor when I ported it over in the next few days. And if that happens it is likely that I do some further commits like adding a README, default (or example) keymap, possibility for using .sublime-settings and so on.

We'll see how I can integrate you into the further progress, but you can send me patches/diffs any time if anything else does not work.

Edit: You can also upload a zip file on your own. I can include that in my package_control.json and update it whenever you update your gist.

I created a repo (named your plugin "File History" - like in browsers -, if that's not misleading) and wanted to edit the .py but then I noticed that you used the CC-BY-SA licence. I'm not too sure about licences and stuff but I am cautious nonetheless. It would be nice if you can do something about that so I can actually edit it.

I'm happy to change the license to something you are more comfortable with

Actually, nvm. While browsing through a bunch of licences I realized that I interpreted the SA (ShareAlike) as ND (NoDerivs). I'm fine with the current licence.

I'll get into your plugin very soon (a few days, I suppose) and finally add it to Package Control.

It's on Package Control now. Try installing it yourself and see if it works.

Updated gist to show preview of files when cycling through the history in the quick panel. Changes made to the package control plugin as well: https://github.com/FichteFoll/sublimetext-filehistory