242cff7abf
At the moment it's not realy possible to extend the login screen to do things it doesn't have built-in support for. This means in order to support niche use cases, those cases have to change the main code base. For instance, oVirt and Vmware deployments want to be able to automaticaly log in guest VMs when a user pre-authenticates through a console on a management host. To support those use cases, we added code to the login screen directly, even though most machines will never be associated with oVirt or Vmware management hosts. We also get requests from e.g. government users that need certain features at the login screen that wouldn't get used much outside of government deployments. For instance, we've gotten requests that a machine contains prominently displays that it has "Top Secret" information. All of these use cases seem like they would better handled via extensions that could be installed in the specific deployments. The problem is extensions only run in the user session, and get disabled at the login screen automatically. This commit changes that. Now extensions can specify in their metadata via a new sessionModes property, which modes that want to run in. For backward compatibility, if an extension doesn't specify which session modes it works in, its assumed the extension only works in the user session. Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1967>
676 lines
23 KiB
JavaScript
676 lines
23 KiB
JavaScript
// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
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/* exported init connect disconnect */
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const { GLib, Gio, GObject, Shell, St } = imports.gi;
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const Signals = imports.signals;
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const ExtensionDownloader = imports.ui.extensionDownloader;
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const ExtensionUtils = imports.misc.extensionUtils;
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const FileUtils = imports.misc.fileUtils;
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const Main = imports.ui.main;
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const MessageTray = imports.ui.messageTray;
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const { ExtensionState, ExtensionType } = ExtensionUtils;
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const ENABLED_EXTENSIONS_KEY = 'enabled-extensions';
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const DISABLED_EXTENSIONS_KEY = 'disabled-extensions';
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const DISABLE_USER_EXTENSIONS_KEY = 'disable-user-extensions';
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const EXTENSION_DISABLE_VERSION_CHECK_KEY = 'disable-extension-version-validation';
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const UPDATE_CHECK_TIMEOUT = 24 * 60 * 60; // 1 day in seconds
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var ExtensionManager = class {
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constructor() {
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this._initialized = false;
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this._updateNotified = false;
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this._extensions = new Map();
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this._unloadedExtensions = new Map();
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this._enabledExtensions = [];
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this._extensionOrder = [];
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Main.sessionMode.connect('updated', this._sessionUpdated.bind(this));
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}
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init() {
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// The following file should exist for a period of time when extensions
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// are enabled after start. If it exists, then the systemd unit will
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// disable extensions should gnome-shell crash.
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// Should the file already exist from a previous login, then this is OK.
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let disableFilename = GLib.build_filenamev([GLib.get_user_runtime_dir(), 'gnome-shell-disable-extensions']);
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let disableFile = Gio.File.new_for_path(disableFilename);
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try {
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disableFile.create(Gio.FileCreateFlags.REPLACE_DESTINATION, null);
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} catch (e) {
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log('Failed to create file %s: %s'.format(disableFilename, e.message));
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}
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GLib.timeout_add_seconds(GLib.PRIORITY_DEFAULT, 60, () => {
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disableFile.delete(null);
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return GLib.SOURCE_REMOVE;
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});
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this._installExtensionUpdates();
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this._sessionUpdated();
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GLib.timeout_add_seconds(GLib.PRIORITY_DEFAULT, UPDATE_CHECK_TIMEOUT, () => {
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ExtensionDownloader.checkForUpdates();
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return GLib.SOURCE_CONTINUE;
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});
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ExtensionDownloader.checkForUpdates();
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}
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get updatesSupported() {
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const appSys = Shell.AppSystem.get_default();
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return appSys.lookup_app('org.gnome.Extensions.desktop') !== null;
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}
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lookup(uuid) {
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return this._extensions.get(uuid);
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}
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getUuids() {
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return [...this._extensions.keys()];
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}
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_extensionSupportsSessionMode(uuid) {
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let extension = this.lookup(uuid);
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if (!extension)
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return false;
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if (extension.sessionModes.includes(Main.sessionMode.currentMode))
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return true;
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if (extension.sessionModes.includes(Main.sessionMode.parentMode))
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return true;
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return false;
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}
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_sessionModeCanUseExtension(uuid) {
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if (!Main.sessionMode.allowExtensions)
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return false;
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if (!this._extensionSupportsSessionMode(uuid))
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return false;
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return true;
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}
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_callExtensionDisable(uuid) {
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let extension = this.lookup(uuid);
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if (!extension)
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return;
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if (extension.state != ExtensionState.ENABLED)
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return;
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// "Rebase" the extension order by disabling and then enabling extensions
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// in order to help prevent conflicts.
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// Example:
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// order = [A, B, C, D, E]
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// user disables C
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// this should: disable E, disable D, disable C, enable D, enable E
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let orderIdx = this._extensionOrder.indexOf(uuid);
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let order = this._extensionOrder.slice(orderIdx + 1);
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let orderReversed = order.slice().reverse();
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for (let i = 0; i < orderReversed.length; i++) {
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let otherUuid = orderReversed[i];
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try {
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this.lookup(otherUuid).stateObj.disable();
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} catch (e) {
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this.logExtensionError(otherUuid, e);
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}
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}
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try {
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extension.stateObj.disable();
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} catch (e) {
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this.logExtensionError(uuid, e);
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}
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if (extension.stylesheet) {
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let theme = St.ThemeContext.get_for_stage(global.stage).get_theme();
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theme.unload_stylesheet(extension.stylesheet);
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delete extension.stylesheet;
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}
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for (let i = 0; i < order.length; i++) {
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let otherUuid = order[i];
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try {
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this.lookup(otherUuid).stateObj.enable();
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} catch (e) {
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this.logExtensionError(otherUuid, e);
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}
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}
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this._extensionOrder.splice(orderIdx, 1);
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if (extension.state != ExtensionState.ERROR) {
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extension.state = ExtensionState.DISABLED;
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this.emit('extension-state-changed', extension);
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}
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}
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_callExtensionEnable(uuid) {
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if (!this._sessionModeCanUseExtension(uuid))
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return;
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let extension = this.lookup(uuid);
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if (!extension)
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return;
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if (extension.state == ExtensionState.INITIALIZED)
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this._callExtensionInit(uuid);
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if (extension.state != ExtensionState.DISABLED)
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return;
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let stylesheetNames = ['%s.css'.format(global.session_mode), 'stylesheet.css'];
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let theme = St.ThemeContext.get_for_stage(global.stage).get_theme();
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for (let i = 0; i < stylesheetNames.length; i++) {
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try {
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let stylesheetFile = extension.dir.get_child(stylesheetNames[i]);
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theme.load_stylesheet(stylesheetFile);
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extension.stylesheet = stylesheetFile;
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break;
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} catch (e) {
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if (e.matches(Gio.IOErrorEnum, Gio.IOErrorEnum.NOT_FOUND))
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continue; // not an error
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this.logExtensionError(uuid, e);
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return;
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}
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}
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try {
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extension.stateObj.enable();
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extension.state = ExtensionState.ENABLED;
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this._extensionOrder.push(uuid);
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this.emit('extension-state-changed', extension);
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} catch (e) {
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if (extension.stylesheet) {
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theme.unload_stylesheet(extension.stylesheet);
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delete extension.stylesheet;
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}
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this.logExtensionError(uuid, e);
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}
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}
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enableExtension(uuid) {
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if (!this._extensions.has(uuid))
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return false;
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let enabledExtensions = global.settings.get_strv(ENABLED_EXTENSIONS_KEY);
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let disabledExtensions = global.settings.get_strv(DISABLED_EXTENSIONS_KEY);
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if (disabledExtensions.includes(uuid)) {
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disabledExtensions = disabledExtensions.filter(item => item !== uuid);
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global.settings.set_strv(DISABLED_EXTENSIONS_KEY, disabledExtensions);
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}
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if (!enabledExtensions.includes(uuid)) {
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enabledExtensions.push(uuid);
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global.settings.set_strv(ENABLED_EXTENSIONS_KEY, enabledExtensions);
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}
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return true;
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}
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disableExtension(uuid) {
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if (!this._extensions.has(uuid))
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return false;
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let enabledExtensions = global.settings.get_strv(ENABLED_EXTENSIONS_KEY);
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let disabledExtensions = global.settings.get_strv(DISABLED_EXTENSIONS_KEY);
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if (enabledExtensions.includes(uuid)) {
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enabledExtensions = enabledExtensions.filter(item => item !== uuid);
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global.settings.set_strv(ENABLED_EXTENSIONS_KEY, enabledExtensions);
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}
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if (!disabledExtensions.includes(uuid)) {
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disabledExtensions.push(uuid);
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global.settings.set_strv(DISABLED_EXTENSIONS_KEY, disabledExtensions);
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}
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return true;
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}
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openExtensionPrefs(uuid, parentWindow, options) {
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const extension = this.lookup(uuid);
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if (!extension || !extension.hasPrefs)
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return false;
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Gio.DBus.session.call(
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'org.gnome.Shell.Extensions',
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'/org/gnome/Shell/Extensions',
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'org.gnome.Shell.Extensions',
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'OpenExtensionPrefs',
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new GLib.Variant('(ssa{sv})', [uuid, parentWindow, options]),
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null,
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Gio.DBusCallFlags.NONE,
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-1,
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null);
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return true;
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}
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notifyExtensionUpdate(uuid) {
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let extension = this.lookup(uuid);
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if (!extension)
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return;
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extension.hasUpdate = true;
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this.emit('extension-state-changed', extension);
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if (!this._updateNotified) {
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this._updateNotified = true;
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let source = new ExtensionUpdateSource();
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Main.messageTray.add(source);
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let notification = new MessageTray.Notification(source,
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_('Extension Updates Available'),
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_('Extension updates are ready to be installed.'));
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notification.connect('activated',
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() => source.open());
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source.showNotification(notification);
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}
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}
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logExtensionError(uuid, error) {
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let extension = this.lookup(uuid);
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if (!extension)
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return;
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const message = error instanceof Error
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? error.message : error.toString();
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extension.error = message;
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extension.state = ExtensionState.ERROR;
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if (!extension.errors)
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extension.errors = [];
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extension.errors.push(message);
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logError(error, 'Extension %s'.format(uuid));
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this._updateCanChange(extension);
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this.emit('extension-state-changed', extension);
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}
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createExtensionObject(uuid, dir, type) {
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let metadataFile = dir.get_child('metadata.json');
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if (!metadataFile.query_exists(null))
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throw new Error('Missing metadata.json');
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let metadataContents, success_;
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try {
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[success_, metadataContents] = metadataFile.load_contents(null);
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metadataContents = new TextDecoder().decode(metadataContents);
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} catch (e) {
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throw new Error('Failed to load metadata.json: %s'.format(e.toString()));
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}
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let meta;
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try {
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meta = JSON.parse(metadataContents);
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} catch (e) {
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throw new Error('Failed to parse metadata.json: %s'.format(e.toString()));
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}
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let requiredProperties = ['uuid', 'name', 'description', 'shell-version'];
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for (let i = 0; i < requiredProperties.length; i++) {
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let prop = requiredProperties[i];
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if (!meta[prop])
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throw new Error('missing "%s" property in metadata.json'.format(prop));
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}
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if (uuid != meta.uuid)
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throw new Error('uuid "%s" from metadata.json does not match directory name "%s"'.format(meta.uuid, uuid));
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let extension = {
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metadata: meta,
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uuid: meta.uuid,
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type,
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dir,
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path: dir.get_path(),
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error: '',
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hasPrefs: dir.get_child('prefs.js').query_exists(null),
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hasUpdate: false,
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canChange: false,
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sessionModes: meta['session-modes'] ? meta['session-modes'] : ['user'],
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};
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this._extensions.set(uuid, extension);
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return extension;
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}
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_canLoad(extension) {
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if (!this._unloadedExtensions.has(extension.uuid))
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return true;
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const version = this._unloadedExtensions.get(extension.uuid);
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return extension.metadata.version === version;
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}
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loadExtension(extension) {
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// Default to error, we set success as the last step
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extension.state = ExtensionState.ERROR;
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let checkVersion = !global.settings.get_boolean(EXTENSION_DISABLE_VERSION_CHECK_KEY);
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if (checkVersion && ExtensionUtils.isOutOfDate(extension)) {
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extension.state = ExtensionState.OUT_OF_DATE;
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} else if (!this._canLoad(extension)) {
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this.logExtensionError(extension.uuid, new Error(
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'A different version was loaded previously. You need to log out for changes to take effect.'));
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} else {
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let enabled = this._enabledExtensions.includes(extension.uuid);
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if (enabled) {
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if (!this._callExtensionInit(extension.uuid))
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return;
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if (extension.state == ExtensionState.DISABLED)
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this._callExtensionEnable(extension.uuid);
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} else {
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extension.state = ExtensionState.INITIALIZED;
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}
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this._unloadedExtensions.delete(extension.uuid);
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}
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this._updateCanChange(extension);
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this.emit('extension-state-changed', extension);
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}
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unloadExtension(extension) {
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const { uuid, type } = extension;
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// Try to disable it -- if it's ERROR'd, we can't guarantee that,
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// but it will be removed on next reboot, and hopefully nothing
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// broke too much.
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this._callExtensionDisable(uuid);
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extension.state = ExtensionState.UNINSTALLED;
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this.emit('extension-state-changed', extension);
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// If we did install an importer, it is now cached and it's
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// impossible to load a different version
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if (type === ExtensionType.PER_USER && extension.imports)
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this._unloadedExtensions.set(uuid, extension.metadata.version);
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this._extensions.delete(uuid);
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return true;
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}
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reloadExtension(oldExtension) {
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// Grab the things we'll need to pass to createExtensionObject
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// to reload it.
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let { uuid, dir, type } = oldExtension;
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// Then unload the old extension.
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this.unloadExtension(oldExtension);
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// Now, recreate the extension and load it.
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let newExtension;
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try {
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newExtension = this.createExtensionObject(uuid, dir, type);
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} catch (e) {
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this.logExtensionError(uuid, e);
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return;
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}
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this.loadExtension(newExtension);
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}
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_callExtensionInit(uuid) {
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if (!this._sessionModeCanUseExtension(uuid))
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return false;
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let extension = this.lookup(uuid);
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if (!extension)
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throw new Error("Extension was not properly created. Call createExtensionObject first");
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let dir = extension.dir;
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let extensionJs = dir.get_child('extension.js');
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if (!extensionJs.query_exists(null)) {
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this.logExtensionError(uuid, new Error('Missing extension.js'));
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return false;
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}
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let extensionModule;
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let extensionState = null;
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ExtensionUtils.installImporter(extension);
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try {
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extensionModule = extension.imports.extension;
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} catch (e) {
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this.logExtensionError(uuid, e);
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return false;
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}
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if (extensionModule.init) {
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try {
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extensionState = extensionModule.init(extension);
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} catch (e) {
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this.logExtensionError(uuid, e);
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return false;
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}
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}
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if (!extensionState)
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extensionState = extensionModule;
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extension.stateObj = extensionState;
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extension.state = ExtensionState.DISABLED;
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this.emit('extension-loaded', uuid);
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return true;
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}
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_getModeExtensions() {
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if (Array.isArray(Main.sessionMode.enabledExtensions))
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return Main.sessionMode.enabledExtensions;
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return [];
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}
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_updateCanChange(extension) {
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let hasError =
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extension.state == ExtensionState.ERROR ||
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extension.state == ExtensionState.OUT_OF_DATE;
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let isMode = this._getModeExtensions().includes(extension.uuid);
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let modeOnly = global.settings.get_boolean(DISABLE_USER_EXTENSIONS_KEY);
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let changeKey = isMode
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? DISABLE_USER_EXTENSIONS_KEY
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: ENABLED_EXTENSIONS_KEY;
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extension.canChange =
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!hasError &&
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global.settings.is_writable(changeKey) &&
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(isMode || !modeOnly);
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}
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_getEnabledExtensions() {
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let extensions = this._getModeExtensions();
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if (!global.settings.get_boolean(DISABLE_USER_EXTENSIONS_KEY))
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extensions = extensions.concat(global.settings.get_strv(ENABLED_EXTENSIONS_KEY));
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// filter out 'disabled-extensions' which takes precedence
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let disabledExtensions = global.settings.get_strv(DISABLED_EXTENSIONS_KEY);
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return extensions.filter(item => !disabledExtensions.includes(item));
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}
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_onUserExtensionsEnabledChanged() {
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this._onEnabledExtensionsChanged();
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this._onSettingsWritableChanged();
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}
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_onEnabledExtensionsChanged() {
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let newEnabledExtensions = this._getEnabledExtensions();
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// Find and enable all the newly enabled extensions: UUIDs found in the
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// new setting, but not in the old one.
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newEnabledExtensions
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.filter(uuid => !this._enabledExtensions.includes(uuid) &&
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this._extensionSupportsSessionMode(uuid))
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.forEach(uuid => this._callExtensionEnable(uuid));
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// Find and disable all the newly disabled extensions: UUIDs found in the
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// old setting, but not in the new one.
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this._extensionOrder
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.filter(uuid => !newEnabledExtensions.includes(uuid) ||
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!this._extensionSupportsSessionMode(uuid))
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.reverse().forEach(uuid => this._callExtensionDisable(uuid));
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this._enabledExtensions = newEnabledExtensions;
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}
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_onSettingsWritableChanged() {
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for (let extension of this._extensions.values()) {
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this._updateCanChange(extension);
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this.emit('extension-state-changed', extension);
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}
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}
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_onVersionValidationChanged() {
|
|
// Disabling extensions modifies the order array, so use a copy
|
|
let extensionOrder = this._extensionOrder.slice();
|
|
|
|
// Disable enabled extensions in the reverse order first to avoid
|
|
// the "rebasing" done in _callExtensionDisable...
|
|
extensionOrder.slice().reverse().forEach(uuid => {
|
|
this._callExtensionDisable(uuid);
|
|
});
|
|
|
|
// ...and then reload and enable extensions in the correct order again.
|
|
[...this._extensions.values()].sort((a, b) => {
|
|
return extensionOrder.indexOf(a.uuid) - extensionOrder.indexOf(b.uuid);
|
|
}).forEach(extension => this.reloadExtension(extension));
|
|
}
|
|
|
|
_installExtensionUpdates() {
|
|
if (!this.updatesSupported)
|
|
return;
|
|
|
|
FileUtils.collectFromDatadirs('extension-updates', true, (dir, info) => {
|
|
let fileType = info.get_file_type();
|
|
if (fileType !== Gio.FileType.DIRECTORY)
|
|
return;
|
|
let uuid = info.get_name();
|
|
let extensionDir = Gio.File.new_for_path(
|
|
GLib.build_filenamev([global.userdatadir, 'extensions', uuid]));
|
|
|
|
try {
|
|
FileUtils.recursivelyDeleteDir(extensionDir, false);
|
|
FileUtils.recursivelyMoveDir(dir, extensionDir);
|
|
} catch (e) {
|
|
log('Failed to install extension updates for %s'.format(uuid));
|
|
} finally {
|
|
FileUtils.recursivelyDeleteDir(dir, true);
|
|
}
|
|
});
|
|
}
|
|
|
|
_loadExtensions() {
|
|
global.settings.connect('changed::%s'.format(ENABLED_EXTENSIONS_KEY),
|
|
this._onEnabledExtensionsChanged.bind(this));
|
|
global.settings.connect('changed::%s'.format(DISABLED_EXTENSIONS_KEY),
|
|
this._onEnabledExtensionsChanged.bind(this));
|
|
global.settings.connect('changed::%s'.format(DISABLE_USER_EXTENSIONS_KEY),
|
|
this._onUserExtensionsEnabledChanged.bind(this));
|
|
global.settings.connect('changed::%s'.format(EXTENSION_DISABLE_VERSION_CHECK_KEY),
|
|
this._onVersionValidationChanged.bind(this));
|
|
global.settings.connect('writable-changed::%s'.format(ENABLED_EXTENSIONS_KEY),
|
|
this._onSettingsWritableChanged.bind(this));
|
|
global.settings.connect('writable-changed::%s'.format(DISABLED_EXTENSIONS_KEY),
|
|
this._onSettingsWritableChanged.bind(this));
|
|
|
|
this._enabledExtensions = this._getEnabledExtensions();
|
|
|
|
let perUserDir = Gio.File.new_for_path(global.userdatadir);
|
|
FileUtils.collectFromDatadirs('extensions', true, (dir, info) => {
|
|
let fileType = info.get_file_type();
|
|
if (fileType != Gio.FileType.DIRECTORY)
|
|
return;
|
|
let uuid = info.get_name();
|
|
let existing = this.lookup(uuid);
|
|
if (existing) {
|
|
log('Extension %s already installed in %s. %s will not be loaded'.format(uuid, existing.path, dir.get_path()));
|
|
return;
|
|
}
|
|
|
|
let extension;
|
|
let type = dir.has_prefix(perUserDir)
|
|
? ExtensionType.PER_USER
|
|
: ExtensionType.SYSTEM;
|
|
try {
|
|
extension = this.createExtensionObject(uuid, dir, type);
|
|
} catch (e) {
|
|
logError(e, 'Could not load extension %s'.format(uuid));
|
|
return;
|
|
}
|
|
this.loadExtension(extension);
|
|
});
|
|
}
|
|
|
|
_enableAllExtensions() {
|
|
if (!this._initialized) {
|
|
this._loadExtensions();
|
|
this._initialized = true;
|
|
} else {
|
|
this._enabledExtensions.forEach(uuid => {
|
|
this._callExtensionEnable(uuid);
|
|
});
|
|
}
|
|
}
|
|
|
|
_disableAllExtensions() {
|
|
if (this._initialized) {
|
|
this._extensionOrder.slice().reverse().forEach(uuid => {
|
|
this._callExtensionDisable(uuid);
|
|
});
|
|
}
|
|
}
|
|
|
|
_sessionUpdated() {
|
|
// For now sessionMode.allowExtensions controls extensions from both the
|
|
// 'enabled-extensions' preference and the sessionMode.enabledExtensions
|
|
// property; it might make sense to make enabledExtensions independent
|
|
// from allowExtensions in the future
|
|
if (Main.sessionMode.allowExtensions) {
|
|
// Take care of added or removed sessionMode extensions
|
|
this._onEnabledExtensionsChanged();
|
|
this._enableAllExtensions();
|
|
} else {
|
|
this._disableAllExtensions();
|
|
}
|
|
}
|
|
};
|
|
Signals.addSignalMethods(ExtensionManager.prototype);
|
|
|
|
const ExtensionUpdateSource = GObject.registerClass(
|
|
class ExtensionUpdateSource extends MessageTray.Source {
|
|
_init() {
|
|
let appSys = Shell.AppSystem.get_default();
|
|
this._app = appSys.lookup_app('org.gnome.Extensions.desktop');
|
|
|
|
super._init(this._app.get_name());
|
|
}
|
|
|
|
getIcon() {
|
|
return this._app.app_info.get_icon();
|
|
}
|
|
|
|
_createPolicy() {
|
|
return new MessageTray.NotificationApplicationPolicy(this._app.id);
|
|
}
|
|
|
|
open() {
|
|
this._app.activate();
|
|
Main.overview.hide();
|
|
Main.panel.closeCalendar();
|
|
}
|
|
});
|