diff options
Diffstat (limited to 'browser/components/sessionstore/SessionStore.jsm')
| -rw-r--r-- | browser/components/sessionstore/SessionStore.jsm | 4746 |
1 files changed, 0 insertions, 4746 deletions
diff --git a/browser/components/sessionstore/SessionStore.jsm b/browser/components/sessionstore/SessionStore.jsm deleted file mode 100644 index 6b30943f3..000000000 --- a/browser/components/sessionstore/SessionStore.jsm +++ /dev/null @@ -1,4746 +0,0 @@ -/* This Source Code Form is subject to the terms of the Mozilla Public - * License, v. 2.0. If a copy of the MPL was not distributed with this file, - * You can obtain one at http://mozilla.org/MPL/2.0/. */ - -"use strict"; - -this.EXPORTED_SYMBOLS = ["SessionStore"]; - -const Cu = Components.utils; -const Cc = Components.classes; -const Ci = Components.interfaces; -const Cr = Components.results; - -// Current version of the format used by Session Restore. -const FORMAT_VERSION = 1; - -const TAB_STATE_NEEDS_RESTORE = 1; -const TAB_STATE_RESTORING = 2; -const TAB_STATE_WILL_RESTORE = 3; - -// A new window has just been restored. At this stage, tabs are generally -// not restored. -const NOTIFY_SINGLE_WINDOW_RESTORED = "sessionstore-single-window-restored"; -const NOTIFY_WINDOWS_RESTORED = "sessionstore-windows-restored"; -const NOTIFY_BROWSER_STATE_RESTORED = "sessionstore-browser-state-restored"; -const NOTIFY_LAST_SESSION_CLEARED = "sessionstore-last-session-cleared"; -const NOTIFY_RESTORING_ON_STARTUP = "sessionstore-restoring-on-startup"; -const NOTIFY_INITIATING_MANUAL_RESTORE = "sessionstore-initiating-manual-restore"; - -const NOTIFY_TAB_RESTORED = "sessionstore-debug-tab-restored"; // WARNING: debug-only - -// Maximum number of tabs to restore simultaneously. Previously controlled by -// the browser.sessionstore.max_concurrent_tabs pref. -const MAX_CONCURRENT_TAB_RESTORES = 3; - -// Amount (in CSS px) by which we allow window edges to be off-screen -// when restoring a window, before we override the saved position to -// pull the window back within the available screen area. -const SCREEN_EDGE_SLOP = 8; - -// global notifications observed -const OBSERVING = [ - "browser-window-before-show", "domwindowclosed", - "quit-application-granted", "browser-lastwindow-close-granted", - "quit-application", "browser:purge-session-history", - "browser:purge-domain-data", - "idle-daily", -]; - -// XUL Window properties to (re)store -// Restored in restoreDimensions() -const WINDOW_ATTRIBUTES = ["width", "height", "screenX", "screenY", "sizemode"]; - -// Hideable window features to (re)store -// Restored in restoreWindowFeatures() -const WINDOW_HIDEABLE_FEATURES = [ - "menubar", "toolbar", "locationbar", "personalbar", "statusbar", "scrollbars" -]; - -// Messages that will be received via the Frame Message Manager. -const MESSAGES = [ - // The content script sends us data that has been invalidated and needs to - // be saved to disk. - "SessionStore:update", - - // The restoreHistory code has run. This is a good time to run SSTabRestoring. - "SessionStore:restoreHistoryComplete", - - // The load for the restoring tab has begun. We update the URL bar at this - // time; if we did it before, the load would overwrite it. - "SessionStore:restoreTabContentStarted", - - // All network loads for a restoring tab are done, so we should - // consider restoring another tab in the queue. The document has - // been restored, and forms have been filled. We trigger - // SSTabRestored at this time. - "SessionStore:restoreTabContentComplete", - - // A crashed tab was revived by navigating to a different page. Remove its - // browser from the list of crashed browsers to stop ignoring its messages. - "SessionStore:crashedTabRevived", - - // The content script encountered an error. - "SessionStore:error", -]; - -// The list of messages we accept from <xul:browser>s that have no tab -// assigned, or whose windows have gone away. Those are for example the -// ones that preload about:newtab pages, or from browsers where the window -// has just been closed. -const NOTAB_MESSAGES = new Set([ - // For a description see above. - "SessionStore:crashedTabRevived", - - // For a description see above. - "SessionStore:update", - - // For a description see above. - "SessionStore:error", -]); - -// The list of messages we accept without an "epoch" parameter. -// See getCurrentEpoch() and friends to find out what an "epoch" is. -const NOEPOCH_MESSAGES = new Set([ - // For a description see above. - "SessionStore:crashedTabRevived", - - // For a description see above. - "SessionStore:error", -]); - -// The list of messages we want to receive even during the short period after a -// frame has been removed from the DOM and before its frame script has finished -// unloading. -const CLOSED_MESSAGES = new Set([ - // For a description see above. - "SessionStore:crashedTabRevived", - - // For a description see above. - "SessionStore:update", - - // For a description see above. - "SessionStore:error", -]); - -// These are tab events that we listen to. -const TAB_EVENTS = [ - "TabOpen", "TabBrowserInserted", "TabClose", "TabSelect", "TabShow", "TabHide", "TabPinned", - "TabUnpinned" -]; - -const NS_XUL = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"; - -Cu.import("resource://gre/modules/PrivateBrowsingUtils.jsm", this); -Cu.import("resource://gre/modules/Promise.jsm", this); -Cu.import("resource://gre/modules/Services.jsm", this); -Cu.import("resource://gre/modules/Task.jsm", this); -Cu.import("resource://gre/modules/TelemetryStopwatch.jsm", this); -Cu.import("resource://gre/modules/TelemetryTimestamps.jsm", this); -Cu.import("resource://gre/modules/Timer.jsm", this); -Cu.import("resource://gre/modules/XPCOMUtils.jsm", this); -Cu.import("resource://gre/modules/debug.js", this); -Cu.import("resource://gre/modules/osfile.jsm", this); - -XPCOMUtils.defineLazyServiceGetter(this, "gSessionStartup", - "@mozilla.org/browser/sessionstartup;1", "nsISessionStartup"); -XPCOMUtils.defineLazyServiceGetter(this, "gScreenManager", - "@mozilla.org/gfx/screenmanager;1", "nsIScreenManager"); -XPCOMUtils.defineLazyServiceGetter(this, "Telemetry", - "@mozilla.org/base/telemetry;1", "nsITelemetry"); -XPCOMUtils.defineLazyModuleGetter(this, "console", - "resource://gre/modules/Console.jsm"); -XPCOMUtils.defineLazyModuleGetter(this, "RecentWindow", - "resource:///modules/RecentWindow.jsm"); - -XPCOMUtils.defineLazyModuleGetter(this, "AppConstants", - "resource://gre/modules/AppConstants.jsm"); -XPCOMUtils.defineLazyModuleGetter(this, "GlobalState", - "resource:///modules/sessionstore/GlobalState.jsm"); -XPCOMUtils.defineLazyModuleGetter(this, "PrivacyFilter", - "resource:///modules/sessionstore/PrivacyFilter.jsm"); -XPCOMUtils.defineLazyModuleGetter(this, "RunState", - "resource:///modules/sessionstore/RunState.jsm"); -XPCOMUtils.defineLazyModuleGetter(this, "ScratchpadManager", - "resource://devtools/client/scratchpad/scratchpad-manager.jsm"); -XPCOMUtils.defineLazyModuleGetter(this, "SessionSaver", - "resource:///modules/sessionstore/SessionSaver.jsm"); -XPCOMUtils.defineLazyModuleGetter(this, "SessionCookies", - "resource:///modules/sessionstore/SessionCookies.jsm"); -XPCOMUtils.defineLazyModuleGetter(this, "SessionFile", - "resource:///modules/sessionstore/SessionFile.jsm"); -XPCOMUtils.defineLazyModuleGetter(this, "TabAttributes", - "resource:///modules/sessionstore/TabAttributes.jsm"); -XPCOMUtils.defineLazyModuleGetter(this, "TabCrashHandler", - "resource:///modules/ContentCrashHandlers.jsm"); -XPCOMUtils.defineLazyModuleGetter(this, "TabState", - "resource:///modules/sessionstore/TabState.jsm"); -XPCOMUtils.defineLazyModuleGetter(this, "TabStateCache", - "resource:///modules/sessionstore/TabStateCache.jsm"); -XPCOMUtils.defineLazyModuleGetter(this, "TabStateFlusher", - "resource:///modules/sessionstore/TabStateFlusher.jsm"); -XPCOMUtils.defineLazyModuleGetter(this, "Utils", - "resource://gre/modules/sessionstore/Utils.jsm"); -XPCOMUtils.defineLazyModuleGetter(this, "ViewSourceBrowser", - "resource://gre/modules/ViewSourceBrowser.jsm"); -XPCOMUtils.defineLazyModuleGetter(this, "AsyncShutdown", - "resource://gre/modules/AsyncShutdown.jsm"); - -Object.defineProperty(this, "HUDService", { - get: function HUDService_getter() { - let devtools = Cu.import("resource://devtools/shared/Loader.jsm", {}).devtools; - return devtools.require("devtools/client/webconsole/hudservice").HUDService; - }, - configurable: true, - enumerable: true -}); - -/** - * |true| if we are in debug mode, |false| otherwise. - * Debug mode is controlled by preference browser.sessionstore.debug - */ -var gDebuggingEnabled = false; -function debug(aMsg) { - if (gDebuggingEnabled) { - aMsg = ("SessionStore: " + aMsg).replace(/\S{80}/g, "$&\n"); - Services.console.logStringMessage(aMsg); - } -} - -this.SessionStore = { - get promiseInitialized() { - return SessionStoreInternal.promiseInitialized; - }, - - get canRestoreLastSession() { - return SessionStoreInternal.canRestoreLastSession; - }, - - set canRestoreLastSession(val) { - SessionStoreInternal.canRestoreLastSession = val; - }, - - get lastClosedObjectType() { - return SessionStoreInternal.lastClosedObjectType; - }, - - init: function ss_init() { - SessionStoreInternal.init(); - }, - - getBrowserState: function ss_getBrowserState() { - return SessionStoreInternal.getBrowserState(); - }, - - setBrowserState: function ss_setBrowserState(aState) { - SessionStoreInternal.setBrowserState(aState); - }, - - getWindowState: function ss_getWindowState(aWindow) { - return SessionStoreInternal.getWindowState(aWindow); - }, - - setWindowState: function ss_setWindowState(aWindow, aState, aOverwrite) { - SessionStoreInternal.setWindowState(aWindow, aState, aOverwrite); - }, - - getTabState: function ss_getTabState(aTab) { - return SessionStoreInternal.getTabState(aTab); - }, - - setTabState: function ss_setTabState(aTab, aState) { - SessionStoreInternal.setTabState(aTab, aState); - }, - - duplicateTab: function ss_duplicateTab(aWindow, aTab, aDelta = 0) { - return SessionStoreInternal.duplicateTab(aWindow, aTab, aDelta); - }, - - getClosedTabCount: function ss_getClosedTabCount(aWindow) { - return SessionStoreInternal.getClosedTabCount(aWindow); - }, - - getClosedTabData: function ss_getClosedTabData(aWindow, aAsString = true) { - return SessionStoreInternal.getClosedTabData(aWindow, aAsString); - }, - - undoCloseTab: function ss_undoCloseTab(aWindow, aIndex) { - return SessionStoreInternal.undoCloseTab(aWindow, aIndex); - }, - - forgetClosedTab: function ss_forgetClosedTab(aWindow, aIndex) { - return SessionStoreInternal.forgetClosedTab(aWindow, aIndex); - }, - - getClosedWindowCount: function ss_getClosedWindowCount() { - return SessionStoreInternal.getClosedWindowCount(); - }, - - getClosedWindowData: function ss_getClosedWindowData(aAsString = true) { - return SessionStoreInternal.getClosedWindowData(aAsString); - }, - - undoCloseWindow: function ss_undoCloseWindow(aIndex) { - return SessionStoreInternal.undoCloseWindow(aIndex); - }, - - forgetClosedWindow: function ss_forgetClosedWindow(aIndex) { - return SessionStoreInternal.forgetClosedWindow(aIndex); - }, - - getWindowValue: function ss_getWindowValue(aWindow, aKey) { - return SessionStoreInternal.getWindowValue(aWindow, aKey); - }, - - setWindowValue: function ss_setWindowValue(aWindow, aKey, aStringValue) { - SessionStoreInternal.setWindowValue(aWindow, aKey, aStringValue); - }, - - deleteWindowValue: function ss_deleteWindowValue(aWindow, aKey) { - SessionStoreInternal.deleteWindowValue(aWindow, aKey); - }, - - getTabValue: function ss_getTabValue(aTab, aKey) { - return SessionStoreInternal.getTabValue(aTab, aKey); - }, - - setTabValue: function ss_setTabValue(aTab, aKey, aStringValue) { - SessionStoreInternal.setTabValue(aTab, aKey, aStringValue); - }, - - deleteTabValue: function ss_deleteTabValue(aTab, aKey) { - SessionStoreInternal.deleteTabValue(aTab, aKey); - }, - - getGlobalValue: function ss_getGlobalValue(aKey) { - return SessionStoreInternal.getGlobalValue(aKey); - }, - - setGlobalValue: function ss_setGlobalValue(aKey, aStringValue) { - SessionStoreInternal.setGlobalValue(aKey, aStringValue); - }, - - deleteGlobalValue: function ss_deleteGlobalValue(aKey) { - SessionStoreInternal.deleteGlobalValue(aKey); - }, - - persistTabAttribute: function ss_persistTabAttribute(aName) { - SessionStoreInternal.persistTabAttribute(aName); - }, - - restoreLastSession: function ss_restoreLastSession() { - SessionStoreInternal.restoreLastSession(); - }, - - getCurrentState: function (aUpdateAll) { - return SessionStoreInternal.getCurrentState(aUpdateAll); - }, - - reviveCrashedTab(aTab) { - return SessionStoreInternal.reviveCrashedTab(aTab); - }, - - reviveAllCrashedTabs() { - return SessionStoreInternal.reviveAllCrashedTabs(); - }, - - navigateAndRestore(tab, loadArguments, historyIndex) { - return SessionStoreInternal.navigateAndRestore(tab, loadArguments, historyIndex); - }, - - getSessionHistory(tab, updatedCallback) { - return SessionStoreInternal.getSessionHistory(tab, updatedCallback); - }, - - undoCloseById(aClosedId) { - return SessionStoreInternal.undoCloseById(aClosedId); - }, - - /** - * Determines whether the passed version number is compatible with - * the current version number of the SessionStore. - * - * @param version The format and version of the file, as an array, e.g. - * ["sessionrestore", 1] - */ - isFormatVersionCompatible(version) { - if (!version) { - return false; - } - if (!Array.isArray(version)) { - // Improper format. - return false; - } - if (version[0] != "sessionrestore") { - // Not a Session Restore file. - return false; - } - let number = Number.parseFloat(version[1]); - if (Number.isNaN(number)) { - return false; - } - return number <= FORMAT_VERSION; - }, -}; - -// Freeze the SessionStore object. We don't want anyone to modify it. -Object.freeze(SessionStore); - -var SessionStoreInternal = { - QueryInterface: XPCOMUtils.generateQI([ - Ci.nsIDOMEventListener, - Ci.nsIObserver, - Ci.nsISupportsWeakReference - ]), - - _globalState: new GlobalState(), - - // A counter to be used to generate a unique ID for each closed tab or window. - _nextClosedId: 0, - - // During the initial restore and setBrowserState calls tracks the number of - // windows yet to be restored - _restoreCount: -1, - - // For each <browser> element, records the current epoch. - _browserEpochs: new WeakMap(), - - // Any browsers that fires the oop-browser-crashed event gets stored in - // here - that way we know which browsers to ignore messages from (until - // they get restored). - _crashedBrowsers: new WeakSet(), - - // A map (xul:browser -> nsIFrameLoader) that maps a browser to the last - // associated frameLoader we heard about. - _lastKnownFrameLoader: new WeakMap(), - - // A map (xul:browser -> object) that maps a browser associated with a - // recently closed tab to all its necessary state information we need to - // properly handle final update message. - _closedTabs: new WeakMap(), - - // A map (xul:browser -> object) that maps a browser associated with a - // recently closed tab due to a window closure to the tab state information - // that is being stored in _closedWindows for that tab. - _closedWindowTabs: new WeakMap(), - - // A set of window data that has the potential to be saved in the _closedWindows - // array for the session. We will remove window data from this set whenever - // forgetClosedWindow is called for the window, or when session history is - // purged, so that we don't accidentally save that data after the flush has - // completed. Closed tabs use a more complicated mechanism for this particular - // problem. When forgetClosedTab is called, the browser is removed from the - // _closedTabs map, so its data is not recorded. In the purge history case, - // the closedTabs array per window is overwritten so that once the flush is - // complete, the tab would only ever add itself to an array that SessionStore - // no longer cares about. Bug 1230636 has been filed to make the tab case - // work more like the window case, which is more explicit, and easier to - // reason about. - _saveableClosedWindowData: new WeakSet(), - - // A map (xul:browser -> object) that maps a browser that is switching - // remoteness via navigateAndRestore, to the loadArguments that were - // most recently passed when calling navigateAndRestore. - _remotenessChangingBrowsers: new WeakMap(), - - // whether a setBrowserState call is in progress - _browserSetState: false, - - // time in milliseconds when the session was started (saved across sessions), - // defaults to now if no session was restored or timestamp doesn't exist - _sessionStartTime: Date.now(), - - // states for all currently opened windows - _windows: {}, - - // counter for creating unique window IDs - _nextWindowID: 0, - - // states for all recently closed windows - _closedWindows: [], - - // collection of session states yet to be restored - _statesToRestore: {}, - - // counts the number of crashes since the last clean start - _recentCrashes: 0, - - // whether the last window was closed and should be restored - _restoreLastWindow: false, - - // number of tabs currently restoring - _tabsRestoringCount: 0, - - // When starting Firefox with a single private window, this is the place - // where we keep the session we actually wanted to restore in case the user - // decides to later open a non-private window as well. - _deferredInitialState: null, - - // A promise resolved once initialization is complete - _deferredInitialized: (function () { - let deferred = {}; - - deferred.promise = new Promise((resolve, reject) => { - deferred.resolve = resolve; - deferred.reject = reject; - }); - - return deferred; - })(), - - // Whether session has been initialized - _sessionInitialized: false, - - // Promise that is resolved when we're ready to initialize - // and restore the session. - _promiseReadyForInitialization: null, - - // Keep busy state counters per window. - _windowBusyStates: new WeakMap(), - - /** - * A promise fulfilled once initialization is complete. - */ - get promiseInitialized() { - return this._deferredInitialized.promise; - }, - - get canRestoreLastSession() { - return LastSession.canRestore; - }, - - set canRestoreLastSession(val) { - // Cheat a bit; only allow false. - if (!val) { - LastSession.clear(); - } - }, - - /** - * Returns a string describing the last closed object, either "tab" or "window". - * - * This was added to support the sessions.restore WebExtensions API. - */ - get lastClosedObjectType() { - if (this._closedWindows.length) { - // Since there are closed windows, we need to check if there's a closed tab - // in one of the currently open windows that was closed after the - // last-closed window. - let tabTimestamps = []; - let windowsEnum = Services.wm.getEnumerator("navigator:browser"); - while (windowsEnum.hasMoreElements()) { - let window = windowsEnum.getNext(); - let windowState = this._windows[window.__SSi]; - if (windowState && windowState._closedTabs[0]) { - tabTimestamps.push(windowState._closedTabs[0].closedAt); - } - } - if (!tabTimestamps.length || - (tabTimestamps.sort((a, b) => b - a)[0] < this._closedWindows[0].closedAt)) { - return "window"; - } - } - return "tab"; - }, - - /** - * Initialize the sessionstore service. - */ - init: function () { - if (this._initialized) { - throw new Error("SessionStore.init() must only be called once!"); - } - - TelemetryTimestamps.add("sessionRestoreInitialized"); - OBSERVING.forEach(function(aTopic) { - Services.obs.addObserver(this, aTopic, true); - }, this); - - this._initPrefs(); - this._initialized = true; - }, - - /** - * Initialize the session using the state provided by SessionStartup - */ - initSession: function () { - TelemetryStopwatch.start("FX_SESSION_RESTORE_STARTUP_INIT_SESSION_MS"); - let state; - let ss = gSessionStartup; - - if (ss.doRestore() || - ss.sessionType == Ci.nsISessionStartup.DEFER_SESSION) { - state = ss.state; - } - - if (state) { - try { - // If we're doing a DEFERRED session, then we want to pull pinned tabs - // out so they can be restored. - if (ss.sessionType == Ci.nsISessionStartup.DEFER_SESSION) { - let [iniState, remainingState] = this._prepDataForDeferredRestore(state); - // If we have a iniState with windows, that means that we have windows - // with app tabs to restore. - if (iniState.windows.length) - state = iniState; - else - state = null; - - if (remainingState.windows.length) { - LastSession.setState(remainingState); - } - } - else { - // Get the last deferred session in case the user still wants to - // restore it - LastSession.setState(state.lastSessionState); - - if (ss.previousSessionCrashed) { - this._recentCrashes = (state.session && - state.session.recentCrashes || 0) + 1; - - if (this._needsRestorePage(state, this._recentCrashes)) { - // replace the crashed session with a restore-page-only session - let url = "about:sessionrestore"; - let formdata = {id: {sessionData: state}, url}; - let entry = {url, triggeringPrincipal_base64: Utils.SERIALIZED_SYSTEMPRINCIPAL }; - state = { windows: [{ tabs: [{ entries: [entry], formdata }] }] }; - } else if (this._hasSingleTabWithURL(state.windows, - "about:welcomeback")) { - // On a single about:welcomeback URL that crashed, replace about:welcomeback - // with about:sessionrestore, to make clear to the user that we crashed. - state.windows[0].tabs[0].entries[0].url = "about:sessionrestore"; - state.windows[0].tabs[0].entries[0].triggeringPrincipal_base64 = Utils.SERIALIZED_SYSTEMPRINCIPAL; - } - } - - // Update the session start time using the restored session state. - this._updateSessionStartTime(state); - - // make sure that at least the first window doesn't have anything hidden - delete state.windows[0].hidden; - // Since nothing is hidden in the first window, it cannot be a popup - delete state.windows[0].isPopup; - // We don't want to minimize and then open a window at startup. - if (state.windows[0].sizemode == "minimized") - state.windows[0].sizemode = "normal"; - // clear any lastSessionWindowID attributes since those don't matter - // during normal restore - state.windows.forEach(function(aWindow) { - delete aWindow.__lastSessionWindowID; - }); - } - } - catch (ex) { debug("The session file is invalid: " + ex); } - } - - // at this point, we've as good as resumed the session, so we can - // clear the resume_session_once flag, if it's set - if (!RunState.isQuitting && - this._prefBranch.getBoolPref("sessionstore.resume_session_once")) - this._prefBranch.setBoolPref("sessionstore.resume_session_once", false); - - TelemetryStopwatch.finish("FX_SESSION_RESTORE_STARTUP_INIT_SESSION_MS"); - return state; - }, - - _initPrefs : function() { - this._prefBranch = Services.prefs.getBranch("browser."); - - gDebuggingEnabled = this._prefBranch.getBoolPref("sessionstore.debug"); - - Services.prefs.addObserver("browser.sessionstore.debug", () => { - gDebuggingEnabled = this._prefBranch.getBoolPref("sessionstore.debug"); - }, false); - - this._max_tabs_undo = this._prefBranch.getIntPref("sessionstore.max_tabs_undo"); - this._prefBranch.addObserver("sessionstore.max_tabs_undo", this, true); - - this._max_windows_undo = this._prefBranch.getIntPref("sessionstore.max_windows_undo"); - this._prefBranch.addObserver("sessionstore.max_windows_undo", this, true); - }, - - /** - * Called on application shutdown, after notifications: - * quit-application-granted, quit-application - */ - _uninit: function ssi_uninit() { - if (!this._initialized) { - throw new Error("SessionStore is not initialized."); - } - - // Prepare to close the session file and write the last state. - RunState.setClosing(); - - // save all data for session resuming - if (this._sessionInitialized) { - SessionSaver.run(); - } - - // clear out priority queue in case it's still holding refs - TabRestoreQueue.reset(); - - // Make sure to cancel pending saves. - SessionSaver.cancel(); - }, - - /** - * Handle notifications - */ - observe: function ssi_observe(aSubject, aTopic, aData) { - switch (aTopic) { - case "browser-window-before-show": // catch new windows - this.onBeforeBrowserWindowShown(aSubject); - break; - case "domwindowclosed": // catch closed windows - this.onClose(aSubject); - break; - case "quit-application-granted": - let syncShutdown = aData == "syncShutdown"; - this.onQuitApplicationGranted(syncShutdown); - break; - case "browser-lastwindow-close-granted": - this.onLastWindowCloseGranted(); - break; - case "quit-application": - this.onQuitApplication(aData); - break; - case "browser:purge-session-history": // catch sanitization - this.onPurgeSessionHistory(); - break; - case "browser:purge-domain-data": - this.onPurgeDomainData(aData); - break; - case "nsPref:changed": // catch pref changes - this.onPrefChange(aData); - break; - case "idle-daily": - this.onIdleDaily(); - break; - } - }, - - /** - * This method handles incoming messages sent by the session store content - * script via the Frame Message Manager or Parent Process Message Manager, - * and thus enables communication with OOP tabs. - */ - receiveMessage(aMessage) { - // If we got here, that means we're dealing with a frame message - // manager message, so the target will be a <xul:browser>. - var browser = aMessage.target; - let win = browser.ownerGlobal; - let tab = win ? win.gBrowser.getTabForBrowser(browser) : null; - - // Ensure we receive only specific messages from <xul:browser>s that - // have no tab or window assigned, e.g. the ones that preload - // about:newtab pages, or windows that have closed. - if (!tab && !NOTAB_MESSAGES.has(aMessage.name)) { - throw new Error(`received unexpected message '${aMessage.name}' ` + - `from a browser that has no tab or window`); - } - - let data = aMessage.data || {}; - let hasEpoch = data.hasOwnProperty("epoch"); - - // Most messages sent by frame scripts require to pass an epoch. - if (!hasEpoch && !NOEPOCH_MESSAGES.has(aMessage.name)) { - throw new Error(`received message '${aMessage.name}' without an epoch`); - } - - // Ignore messages from previous epochs. - if (hasEpoch && !this.isCurrentEpoch(browser, data.epoch)) { - return; - } - - switch (aMessage.name) { - case "SessionStore:update": - // |browser.frameLoader| might be empty if the browser was already - // destroyed and its tab removed. In that case we still have the last - // frameLoader we know about to compare. - let frameLoader = browser.frameLoader || - this._lastKnownFrameLoader.get(browser.permanentKey); - - // If the message isn't targeting the latest frameLoader discard it. - if (frameLoader != aMessage.targetFrameLoader) { - return; - } - - if (aMessage.data.isFinal) { - // If this the final message we need to resolve all pending flush - // requests for the given browser as they might have been sent too - // late and will never respond. If they have been sent shortly after - // switching a browser's remoteness there isn't too much data to skip. - TabStateFlusher.resolveAll(browser); - } else if (aMessage.data.flushID) { - // This is an update kicked off by an async flush request. Notify the - // TabStateFlusher so that it can finish the request and notify its - // consumer that's waiting for the flush to be done. - TabStateFlusher.resolve(browser, aMessage.data.flushID); - } - - // Ignore messages from <browser> elements that have crashed - // and not yet been revived. - if (this._crashedBrowsers.has(browser.permanentKey)) { - return; - } - - // Record telemetry measurements done in the child and update the tab's - // cached state. Mark the window as dirty and trigger a delayed write. - this.recordTelemetry(aMessage.data.telemetry); - TabState.update(browser, aMessage.data); - this.saveStateDelayed(win); - - // Handle any updates sent by the child after the tab was closed. This - // might be the final update as sent by the "unload" handler but also - // any async update message that was sent before the child unloaded. - if (this._closedTabs.has(browser.permanentKey)) { - let {closedTabs, tabData} = this._closedTabs.get(browser.permanentKey); - - // Update the closed tab's state. This will be reflected in its - // window's list of closed tabs as that refers to the same object. - TabState.copyFromCache(browser, tabData.state); - - // Is this the tab's final message? - if (aMessage.data.isFinal) { - // We expect no further updates. - this._closedTabs.delete(browser.permanentKey); - // The tab state no longer needs this reference. - delete tabData.permanentKey; - - // Determine whether the tab state is worth saving. - let shouldSave = this._shouldSaveTabState(tabData.state); - let index = closedTabs.indexOf(tabData); - - if (shouldSave && index == -1) { - // If the tab state is worth saving and we didn't push it onto - // the list of closed tabs when it was closed (because we deemed - // the state not worth saving) then add it to the window's list - // of closed tabs now. - this.saveClosedTabData(closedTabs, tabData); - } else if (!shouldSave && index > -1) { - // Remove from the list of closed tabs. The update messages sent - // after the tab was closed changed enough state so that we no - // longer consider its data interesting enough to keep around. - this.removeClosedTabData(closedTabs, index); - } - } - } - break; - case "SessionStore:restoreHistoryComplete": - // Notify the tabbrowser that the tab chrome has been restored. - let tabData = TabState.collect(tab); - - // wall-paper fix for bug 439675: make sure that the URL to be loaded - // is always visible in the address bar if no other value is present - let activePageData = tabData.entries[tabData.index - 1] || null; - let uri = activePageData ? activePageData.url || null : null; - // NB: we won't set initial URIs (about:home, about:newtab, etc.) here - // because their load will not normally trigger a location bar clearing - // when they finish loading (to avoid race conditions where we then - // clear user input instead), so we shouldn't set them here either. - // They also don't fall under the issues in bug 439675 where user input - // needs to be preserved if the load doesn't succeed. - // We also don't do this for remoteness updates, where it should not - // be necessary. - if (!browser.userTypedValue && uri && !data.isRemotenessUpdate && - !win.gInitialPages.includes(uri)) { - browser.userTypedValue = uri; - } - - // If the page has a title, set it. - if (activePageData) { - if (activePageData.title) { - tab.label = activePageData.title; - tab.crop = "end"; - } else if (activePageData.url != "about:blank") { - tab.label = activePageData.url; - tab.crop = "center"; - } - } else if (tab.hasAttribute("customizemode")) { - win.gCustomizeMode.setTab(tab); - } - - // Restore the tab icon. - if ("image" in tabData) { - // Use the serialized contentPrincipal with the new icon load. - let loadingPrincipal = Utils.deserializePrincipal(tabData.iconLoadingPrincipal); - win.gBrowser.setIcon(tab, tabData.image, loadingPrincipal); - TabStateCache.update(browser, { image: null, iconLoadingPrincipal: null }); - } - - let event = win.document.createEvent("Events"); - event.initEvent("SSTabRestoring", true, false); - tab.dispatchEvent(event); - break; - case "SessionStore:restoreTabContentStarted": - if (browser.__SS_restoreState == TAB_STATE_NEEDS_RESTORE) { - // If a load not initiated by sessionstore was started in a - // previously pending tab. Mark the tab as no longer pending. - this.markTabAsRestoring(tab); - } else if (!data.isRemotenessUpdate) { - // If the user was typing into the URL bar when we crashed, but hadn't hit - // enter yet, then we just need to write that value to the URL bar without - // loading anything. This must happen after the load, as the load will clear - // userTypedValue. - let tabData = TabState.collect(tab); - if (tabData.userTypedValue && !tabData.userTypedClear && !browser.userTypedValue) { - browser.userTypedValue = tabData.userTypedValue; - win.URLBarSetURI(); - } - - // Remove state we don't need any longer. - TabStateCache.update(browser, { - userTypedValue: null, userTypedClear: null - }); - } - break; - case "SessionStore:restoreTabContentComplete": - // This callback is used exclusively by tests that want to - // monitor the progress of network loads. - if (gDebuggingEnabled) { - Services.obs.notifyObservers(browser, NOTIFY_TAB_RESTORED, null); - } - - SessionStoreInternal._resetLocalTabRestoringState(tab); - SessionStoreInternal.restoreNextTab(); - - this._sendTabRestoredNotification(tab, data.isRemotenessUpdate); - break; - case "SessionStore:crashedTabRevived": - // The browser was revived by navigating to a different page - // manually, so we remove it from the ignored browser set. - this._crashedBrowsers.delete(browser.permanentKey); - break; - case "SessionStore:error": - this.reportInternalError(data); - TabStateFlusher.resolveAll(browser, false, "Received error from the content process"); - break; - default: - throw new Error(`received unknown message '${aMessage.name}'`); - break; - } - }, - - /** - * Record telemetry measurements stored in an object. - * @param telemetry - * {histogramID: value, ...} An object mapping histogramIDs to the - * value to be recorded for that ID, - */ - recordTelemetry: function (telemetry) { - for (let histogramId in telemetry){ - Telemetry.getHistogramById(histogramId).add(telemetry[histogramId]); - } - }, - - /* ........ Window Event Handlers .............. */ - - /** - * Implement nsIDOMEventListener for handling various window and tab events - */ - handleEvent: function ssi_handleEvent(aEvent) { - let win = aEvent.currentTarget.ownerGlobal; - let target = aEvent.originalTarget; - switch (aEvent.type) { - case "TabOpen": - this.onTabAdd(win); - break; - case "TabBrowserInserted": - this.onTabBrowserInserted(win, target); - break; - case "TabClose": - // `adoptedBy` will be set if the tab was closed because it is being - // moved to a new window. - if (!aEvent.detail.adoptedBy) - this.onTabClose(win, target); - this.onTabRemove(win, target); - break; - case "TabSelect": - this.onTabSelect(win); - break; - case "TabShow": - this.onTabShow(win, target); - break; - case "TabHide": - this.onTabHide(win, target); - break; - case "TabPinned": - case "TabUnpinned": - case "SwapDocShells": - this.saveStateDelayed(win); - break; - case "oop-browser-crashed": - this.onBrowserCrashed(target); - break; - case "XULFrameLoaderCreated": - if (target.namespaceURI == NS_XUL && - target.localName == "browser" && - target.frameLoader && - target.permanentKey) { - this._lastKnownFrameLoader.set(target.permanentKey, target.frameLoader); - this.resetEpoch(target); - } - break; - default: - throw new Error(`unhandled event ${aEvent.type}?`); - } - this._clearRestoringWindows(); - }, - - /** - * Generate a unique window identifier - * @return string - * A unique string to identify a window - */ - _generateWindowID: function ssi_generateWindowID() { - return "window" + (this._nextWindowID++); - }, - - /** - * Registers and tracks a given window. - * - * @param aWindow - * Window reference - */ - onLoad(aWindow) { - // return if window has already been initialized - if (aWindow && aWindow.__SSi && this._windows[aWindow.__SSi]) - return; - - // ignore windows opened while shutting down - if (RunState.isQuitting) - return; - - // Assign the window a unique identifier we can use to reference - // internal data about the window. - aWindow.__SSi = this._generateWindowID(); - - let mm = aWindow.getGroupMessageManager("browsers"); - MESSAGES.forEach(msg => { - let listenWhenClosed = CLOSED_MESSAGES.has(msg); - mm.addMessageListener(msg, this, listenWhenClosed); - }); - - // Load the frame script after registering listeners. - mm.loadFrameScript("chrome://browser/content/content-sessionStore.js", true); - - // and create its data object - this._windows[aWindow.__SSi] = { tabs: [], selected: 0, _closedTabs: [], busy: false }; - - if (PrivateBrowsingUtils.isWindowPrivate(aWindow)) - this._windows[aWindow.__SSi].isPrivate = true; - if (!this._isWindowLoaded(aWindow)) - this._windows[aWindow.__SSi]._restoring = true; - if (!aWindow.toolbar.visible) - this._windows[aWindow.__SSi].isPopup = true; - - let tabbrowser = aWindow.gBrowser; - - // add tab change listeners to all already existing tabs - for (let i = 0; i < tabbrowser.tabs.length; i++) { - this.onTabBrowserInserted(aWindow, tabbrowser.tabs[i]); - } - // notification of tab add/remove/selection/show/hide - TAB_EVENTS.forEach(function(aEvent) { - tabbrowser.tabContainer.addEventListener(aEvent, this, true); - }, this); - - // Keep track of a browser's latest frameLoader. - aWindow.gBrowser.addEventListener("XULFrameLoaderCreated", this); - }, - - /** - * Initializes a given window. - * - * Windows are registered as soon as they are created but we need to wait for - * the session file to load, and the initial window's delayed startup to - * finish before initializing a window, i.e. restoring data into it. - * - * @param aWindow - * Window reference - * @param aInitialState - * The initial state to be loaded after startup (optional) - */ - initializeWindow(aWindow, aInitialState = null) { - let isPrivateWindow = PrivateBrowsingUtils.isWindowPrivate(aWindow); - - // perform additional initialization when the first window is loading - if (RunState.isStopped) { - RunState.setRunning(); - - // restore a crashed session resp. resume the last session if requested - if (aInitialState) { - // Don't write to disk right after startup. Set the last time we wrote - // to disk to NOW() to enforce a full interval before the next write. - SessionSaver.updateLastSaveTime(); - - if (isPrivateWindow) { - // We're starting with a single private window. Save the state we - // actually wanted to restore so that we can do it later in case - // the user opens another, non-private window. - this._deferredInitialState = gSessionStartup.state; - - // Nothing to restore now, notify observers things are complete. - Services.obs.notifyObservers(null, NOTIFY_WINDOWS_RESTORED, ""); - } else { - TelemetryTimestamps.add("sessionRestoreRestoring"); - this._restoreCount = aInitialState.windows ? aInitialState.windows.length : 0; - - // global data must be restored before restoreWindow is called so that - // it happens before observers are notified - this._globalState.setFromState(aInitialState); - - let overwrite = this._isCmdLineEmpty(aWindow, aInitialState); - let options = {firstWindow: true, overwriteTabs: overwrite}; - this.restoreWindows(aWindow, aInitialState, options); - } - } - else { - // Nothing to restore, notify observers things are complete. - Services.obs.notifyObservers(null, NOTIFY_WINDOWS_RESTORED, ""); - } - } - // this window was opened by _openWindowWithState - else if (!this._isWindowLoaded(aWindow)) { - let state = this._statesToRestore[aWindow.__SS_restoreID]; - let options = {overwriteTabs: true, isFollowUp: state.windows.length == 1}; - this.restoreWindow(aWindow, state.windows[0], options); - } - // The user opened another, non-private window after starting up with - // a single private one. Let's restore the session we actually wanted to - // restore at startup. - else if (this._deferredInitialState && !isPrivateWindow && - aWindow.toolbar.visible) { - - // global data must be restored before restoreWindow is called so that - // it happens before observers are notified - this._globalState.setFromState(this._deferredInitialState); - - this._restoreCount = this._deferredInitialState.windows ? - this._deferredInitialState.windows.length : 0; - this.restoreWindows(aWindow, this._deferredInitialState, {firstWindow: true}); - this._deferredInitialState = null; - } - else if (this._restoreLastWindow && aWindow.toolbar.visible && - this._closedWindows.length && !isPrivateWindow) { - - // default to the most-recently closed window - // don't use popup windows - let closedWindowState = null; - let closedWindowIndex; - for (let i = 0; i < this._closedWindows.length; i++) { - // Take the first non-popup, point our object at it, and break out. - if (!this._closedWindows[i].isPopup) { - closedWindowState = this._closedWindows[i]; - closedWindowIndex = i; - break; - } - } - - if (closedWindowState) { - let newWindowState; - if (AppConstants.platform == "macosx" || !this._doResumeSession()) { - // We want to split the window up into pinned tabs and unpinned tabs. - // Pinned tabs should be restored. If there are any remaining tabs, - // they should be added back to _closedWindows. - // We'll cheat a little bit and reuse _prepDataForDeferredRestore - // even though it wasn't built exactly for this. - let [appTabsState, normalTabsState] = - this._prepDataForDeferredRestore({ windows: [closedWindowState] }); - - // These are our pinned tabs, which we should restore - if (appTabsState.windows.length) { - newWindowState = appTabsState.windows[0]; - delete newWindowState.__lastSessionWindowID; - } - - // In case there were no unpinned tabs, remove the window from _closedWindows - if (!normalTabsState.windows.length) { - this._closedWindows.splice(closedWindowIndex, 1); - } - // Or update _closedWindows with the modified state - else { - delete normalTabsState.windows[0].__lastSessionWindowID; - this._closedWindows[closedWindowIndex] = normalTabsState.windows[0]; - } - } - else { - // If we're just restoring the window, make sure it gets removed from - // _closedWindows. - this._closedWindows.splice(closedWindowIndex, 1); - newWindowState = closedWindowState; - delete newWindowState.hidden; - } - - if (newWindowState) { - // Ensure that the window state isn't hidden - this._restoreCount = 1; - let state = { windows: [newWindowState] }; - let options = {overwriteTabs: this._isCmdLineEmpty(aWindow, state)}; - this.restoreWindow(aWindow, newWindowState, options); - } - } - // we actually restored the session just now. - this._prefBranch.setBoolPref("sessionstore.resume_session_once", false); - } - if (this._restoreLastWindow && aWindow.toolbar.visible) { - // always reset (if not a popup window) - // we don't want to restore a window directly after, for example, - // undoCloseWindow was executed. - this._restoreLastWindow = false; - } - }, - - /** - * Called right before a new browser window is shown. - * @param aWindow - * Window reference - */ - onBeforeBrowserWindowShown: function (aWindow) { - // Register the window. - this.onLoad(aWindow); - - // Just call initializeWindow() directly if we're initialized already. - if (this._sessionInitialized) { - this.initializeWindow(aWindow); - return; - } - - // The very first window that is opened creates a promise that is then - // re-used by all subsequent windows. The promise will be used to tell - // when we're ready for initialization. - if (!this._promiseReadyForInitialization) { - // Wait for the given window's delayed startup to be finished. - let promise = new Promise(resolve => { - Services.obs.addObserver(function obs(subject, topic) { - if (aWindow == subject) { - Services.obs.removeObserver(obs, topic); - resolve(); - } - }, "browser-delayed-startup-finished", false); - }); - - // We are ready for initialization as soon as the session file has been - // read from disk and the initial window's delayed startup has finished. - this._promiseReadyForInitialization = - Promise.all([promise, gSessionStartup.onceInitialized]); - } - - // We can't call this.onLoad since initialization - // hasn't completed, so we'll wait until it is done. - // Even if additional windows are opened and wait - // for initialization as well, the first opened - // window should execute first, and this.onLoad - // will be called with the initialState. - this._promiseReadyForInitialization.then(() => { - if (aWindow.closed) { - return; - } - - if (this._sessionInitialized) { - this.initializeWindow(aWindow); - } else { - let initialState = this.initSession(); - this._sessionInitialized = true; - - if (initialState) { - Services.obs.notifyObservers(null, NOTIFY_RESTORING_ON_STARTUP, ""); - } - TelemetryStopwatch.start("FX_SESSION_RESTORE_STARTUP_ONLOAD_INITIAL_WINDOW_MS"); - this.initializeWindow(aWindow, initialState); - TelemetryStopwatch.finish("FX_SESSION_RESTORE_STARTUP_ONLOAD_INITIAL_WINDOW_MS"); - - // Let everyone know we're done. - this._deferredInitialized.resolve(); - } - }, console.error); - }, - - /** - * On window close... - * - remove event listeners from tabs - * - save all window data - * @param aWindow - * Window reference - */ - onClose: function ssi_onClose(aWindow) { - // this window was about to be restored - conserve its original data, if any - let isFullyLoaded = this._isWindowLoaded(aWindow); - if (!isFullyLoaded) { - if (!aWindow.__SSi) { - aWindow.__SSi = this._generateWindowID(); - } - - this._windows[aWindow.__SSi] = this._statesToRestore[aWindow.__SS_restoreID]; - delete this._statesToRestore[aWindow.__SS_restoreID]; - delete aWindow.__SS_restoreID; - } - - // ignore windows not tracked by SessionStore - if (!aWindow.__SSi || !this._windows[aWindow.__SSi]) { - return; - } - - // notify that the session store will stop tracking this window so that - // extensions can store any data about this window in session store before - // that's not possible anymore - let event = aWindow.document.createEvent("Events"); - event.initEvent("SSWindowClosing", true, false); - aWindow.dispatchEvent(event); - - if (this.windowToFocus && this.windowToFocus == aWindow) { - delete this.windowToFocus; - } - - var tabbrowser = aWindow.gBrowser; - - let browsers = Array.from(tabbrowser.browsers); - - TAB_EVENTS.forEach(function(aEvent) { - tabbrowser.tabContainer.removeEventListener(aEvent, this, true); - }, this); - - aWindow.gBrowser.removeEventListener("XULFrameLoaderCreated", this); - - let winData = this._windows[aWindow.__SSi]; - - // Collect window data only when *not* closed during shutdown. - if (RunState.isRunning) { - // Grab the most recent window data. The tab data will be updated - // once we finish flushing all of the messages from the tabs. - let tabMap = this._collectWindowData(aWindow); - - for (let [tab, tabData] of tabMap) { - let permanentKey = tab.linkedBrowser.permanentKey; - this._closedWindowTabs.set(permanentKey, tabData); - } - - if (isFullyLoaded) { - winData.title = tabbrowser.selectedBrowser.contentTitle || tabbrowser.selectedTab.label; - winData.title = this._replaceLoadingTitle(winData.title, tabbrowser, - tabbrowser.selectedTab); - SessionCookies.update([winData]); - } - - if (AppConstants.platform != "macosx") { - // Until we decide otherwise elsewhere, this window is part of a series - // of closing windows to quit. - winData._shouldRestore = true; - } - - // Store the window's close date to figure out when each individual tab - // was closed. This timestamp should allow re-arranging data based on how - // recently something was closed. - winData.closedAt = Date.now(); - - // we don't want to save the busy state - delete winData.busy; - - // When closing windows one after the other until Firefox quits, we - // will move those closed in series back to the "open windows" bucket - // before writing to disk. If however there is only a single window - // with tabs we deem not worth saving then we might end up with a - // random closed or even a pop-up window re-opened. To prevent that - // we explicitly allow saving an "empty" window state. - let isLastWindow = - Object.keys(this._windows).length == 1 && - !this._closedWindows.some(win => win._shouldRestore || false); - - // clear this window from the list, since it has definitely been closed. - delete this._windows[aWindow.__SSi]; - - // This window has the potential to be saved in the _closedWindows - // array (maybeSaveClosedWindows gets the final call on that). - this._saveableClosedWindowData.add(winData); - - // Now we have to figure out if this window is worth saving in the _closedWindows - // Object. - // - // We're about to flush the tabs from this window, but it's possible that we - // might never hear back from the content process(es) in time before the user - // chooses to restore the closed window. So we do the following: - // - // 1) Use the tab state cache to determine synchronously if the window is - // worth stashing in _closedWindows. - // 2) Flush the window. - // 3) When the flush is complete, revisit our decision to store the window - // in _closedWindows, and add/remove as necessary. - if (!winData.isPrivate) { - // Remove any open private tabs the window may contain. - PrivacyFilter.filterPrivateTabs(winData); - this.maybeSaveClosedWindow(winData, isLastWindow); - } - - TabStateFlusher.flushWindow(aWindow).then(() => { - // At this point, aWindow is closed! You should probably not try to - // access any DOM elements from aWindow within this callback unless - // you're holding on to them in the closure. - - for (let browser of browsers) { - if (this._closedWindowTabs.has(browser.permanentKey)) { - let tabData = this._closedWindowTabs.get(browser.permanentKey); - TabState.copyFromCache(browser, tabData); - this._closedWindowTabs.delete(browser.permanentKey); - } - } - - // Save non-private windows if they have at - // least one saveable tab or are the last window. - if (!winData.isPrivate) { - // It's possible that a tab switched its privacy state at some point - // before our flush, so we need to filter again. - PrivacyFilter.filterPrivateTabs(winData); - this.maybeSaveClosedWindow(winData, isLastWindow); - } - - // Update the tabs data now that we've got the most - // recent information. - this.cleanUpWindow(aWindow, winData, browsers); - - // save the state without this window to disk - this.saveStateDelayed(); - }); - } else { - this.cleanUpWindow(aWindow, winData, browsers); - } - - for (let i = 0; i < tabbrowser.tabs.length; i++) { - this.onTabRemove(aWindow, tabbrowser.tabs[i], true); - } - }, - - /** - * Clean up the message listeners on a window that has finally - * gone away. Call this once you're sure you don't want to hear - * from any of this windows tabs from here forward. - * - * @param aWindow - * The browser window we're cleaning up. - * @param winData - * The data for the window that we should hold in the - * DyingWindowCache in case anybody is still holding a - * reference to it. - */ - cleanUpWindow(aWindow, winData, browsers) { - // Any leftover TabStateFlusher Promises need to be resolved now, - // since we're about to remove the message listeners. - for (let browser of browsers) { - TabStateFlusher.resolveAll(browser); - } - - // Cache the window state until it is completely gone. - DyingWindowCache.set(aWindow, winData); - - let mm = aWindow.getGroupMessageManager("browsers"); - MESSAGES.forEach(msg => mm.removeMessageListener(msg, this)); - - this._saveableClosedWindowData.delete(winData); - delete aWindow.__SSi; - }, - - /** - * Decides whether or not a closed window should be put into the - * _closedWindows Object. This might be called multiple times per - * window, and will do the right thing of moving the window data - * in or out of _closedWindows if the winData indicates that our - * need for saving it has changed. - * - * @param winData - * The data for the closed window that we might save. - * @param isLastWindow - * Whether or not the window being closed is the last - * browser window. Callers of this function should pass - * in the value of SessionStoreInternal.atLastWindow for - * this argument, and pass in the same value if they happen - * to call this method again asynchronously (for example, after - * a window flush). - */ - maybeSaveClosedWindow(winData, isLastWindow) { - // Make sure SessionStore is still running, and make sure that we - // haven't chosen to forget this window. - if (RunState.isRunning && this._saveableClosedWindowData.has(winData)) { - // Determine whether the window has any tabs worth saving. - let hasSaveableTabs = winData.tabs.some(this._shouldSaveTabState); - - // Note that we might already have this window stored in - // _closedWindows from a previous call to this function. - let winIndex = this._closedWindows.indexOf(winData); - let alreadyStored = (winIndex != -1); - let shouldStore = (hasSaveableTabs || isLastWindow); - - if (shouldStore && !alreadyStored) { - let index = this._closedWindows.findIndex(win => { - return win.closedAt < winData.closedAt; - }); - - // If we found no tab closed before our - // tab then just append it to the list. - if (index == -1) { - index = this._closedWindows.length; - } - - // About to save the closed window, add a unique ID. - winData.closedId = this._nextClosedId++; - - // Insert tabData at the right position. - this._closedWindows.splice(index, 0, winData); - this._capClosedWindows(); - } else if (!shouldStore && alreadyStored) { - this._closedWindows.splice(winIndex, 1); - } - } - }, - - /** - * On quit application granted - */ - onQuitApplicationGranted: function ssi_onQuitApplicationGranted(syncShutdown=false) { - // Collect an initial snapshot of window data before we do the flush - this._forEachBrowserWindow((win) => { - this._collectWindowData(win); - }); - - // Now add an AsyncShutdown blocker that'll spin the event loop - // until the windows have all been flushed. - - // This progress object will track the state of async window flushing - // and will help us debug things that go wrong with our AsyncShutdown - // blocker. - let progress = { total: -1, current: -1 }; - - // We're going down! Switch state so that we treat closing windows and - // tabs correctly. - RunState.setQuitting(); - - if (!syncShutdown) { - // We've got some time to shut down, so let's do this properly. - // To prevent blocker from breaking the 60 sec limit(which will cause a - // crash) of async shutdown during flushing all windows, we resolve the - // promise passed to blocker once: - // 1. the flushing exceed 50 sec, or - // 2. 'oop-frameloader-crashed' or 'ipc:content-shutdown' is observed. - // Thus, Firefox still can open the last session on next startup. - AsyncShutdown.quitApplicationGranted.addBlocker( - "SessionStore: flushing all windows", - () => { - var promises = []; - promises.push(this.flushAllWindowsAsync(progress)); - promises.push(this.looseTimer(50000)); - - var promiseOFC = new Promise(resolve => { - Services.obs.addObserver(function obs(subject, topic) { - Services.obs.removeObserver(obs, topic); - resolve(); - }, "oop-frameloader-crashed", false); - }); - promises.push(promiseOFC); - - var promiseICS = new Promise(resolve => { - Services.obs.addObserver(function obs(subject, topic) { - Services.obs.removeObserver(obs, topic); - resolve(); - }, "ipc:content-shutdown", false); - }); - promises.push(promiseICS); - - return Promise.race(promises); - }, - () => progress); - } else { - // We have to shut down NOW, which means we only get to save whatever - // we already had cached. - } - }, - - /** - * An async Task that iterates all open browser windows and flushes - * any outstanding messages from their tabs. This will also close - * all of the currently open windows while we wait for the flushes - * to complete. - * - * @param progress (Object) - * Optional progress object that will be updated as async - * window flushing progresses. flushAllWindowsSync will - * write to the following properties: - * - * total (int): - * The total number of windows to be flushed. - * current (int): - * The current window that we're waiting for a flush on. - * - * @return Promise - */ - flushAllWindowsAsync: Task.async(function*(progress={}) { - let windowPromises = new Map(); - // We collect flush promises and close each window immediately so that - // the user can't start changing any window state while we're waiting - // for the flushes to finish. - this._forEachBrowserWindow((win) => { - windowPromises.set(win, TabStateFlusher.flushWindow(win)); - - // We have to wait for these messages to come up from - // each window and each browser. In the meantime, hide - // the windows to improve perceived shutdown speed. - let baseWin = win.QueryInterface(Ci.nsIInterfaceRequestor) - .getInterface(Ci.nsIDocShell) - .QueryInterface(Ci.nsIDocShellTreeItem) - .treeOwner - .QueryInterface(Ci.nsIBaseWindow); - baseWin.visibility = false; - }); - - progress.total = windowPromises.size; - progress.current = 0; - - // We'll iterate through the Promise array, yielding each one, so as to - // provide useful progress information to AsyncShutdown. - for (let [win, promise] of windowPromises) { - yield promise; - this._collectWindowData(win); - progress.current++; - }; - - // We must cache this because _getMostRecentBrowserWindow will always - // return null by the time quit-application occurs. - var activeWindow = this._getMostRecentBrowserWindow(); - if (activeWindow) - this.activeWindowSSiCache = activeWindow.__SSi || ""; - DirtyWindows.clear(); - }), - - /** - * On last browser window close - */ - onLastWindowCloseGranted: function ssi_onLastWindowCloseGranted() { - // last browser window is quitting. - // remember to restore the last window when another browser window is opened - // do not account for pref(resume_session_once) at this point, as it might be - // set by another observer getting this notice after us - this._restoreLastWindow = true; - }, - - /** - * On quitting application - * @param aData - * String type of quitting - */ - onQuitApplication: function ssi_onQuitApplication(aData) { - if (aData == "restart") { - this._prefBranch.setBoolPref("sessionstore.resume_session_once", true); - // The browser:purge-session-history notification fires after the - // quit-application notification so unregister the - // browser:purge-session-history notification to prevent clearing - // session data on disk on a restart. It is also unnecessary to - // perform any other sanitization processing on a restart as the - // browser is about to exit anyway. - Services.obs.removeObserver(this, "browser:purge-session-history"); - } - - if (aData != "restart") { - // Throw away the previous session on shutdown - LastSession.clear(); - } - - this._uninit(); - }, - - /** - * On purge of session history - */ - onPurgeSessionHistory: function ssi_onPurgeSessionHistory() { - SessionFile.wipe(); - // If the browser is shutting down, simply return after clearing the - // session data on disk as this notification fires after the - // quit-application notification so the browser is about to exit. - if (RunState.isQuitting) - return; - LastSession.clear(); - - let openWindows = {}; - // Collect open windows. - this._forEachBrowserWindow(({__SSi: id}) => openWindows[id] = true); - - // also clear all data about closed tabs and windows - for (let ix in this._windows) { - if (ix in openWindows) { - this._windows[ix]._closedTabs = []; - } else { - delete this._windows[ix]; - } - } - // also clear all data about closed windows - this._closedWindows = []; - // give the tabbrowsers a chance to clear their histories first - var win = this._getMostRecentBrowserWindow(); - if (win) { - win.setTimeout(() => SessionSaver.run(), 0); - } else if (RunState.isRunning) { - SessionSaver.run(); - } - - this._clearRestoringWindows(); - this._saveableClosedWindowData = new WeakSet(); - }, - - /** - * On purge of domain data - * @param aData - * String domain data - */ - onPurgeDomainData: function ssi_onPurgeDomainData(aData) { - // does a session history entry contain a url for the given domain? - function containsDomain(aEntry) { - if (Utils.hasRootDomain(aEntry.url, aData)) { - return true; - } - return aEntry.children && aEntry.children.some(containsDomain, this); - } - // remove all closed tabs containing a reference to the given domain - for (let ix in this._windows) { - let closedTabs = this._windows[ix]._closedTabs; - for (let i = closedTabs.length - 1; i >= 0; i--) { - if (closedTabs[i].state.entries.some(containsDomain, this)) - closedTabs.splice(i, 1); - } - } - // remove all open & closed tabs containing a reference to the given - // domain in closed windows - for (let ix = this._closedWindows.length - 1; ix >= 0; ix--) { - let closedTabs = this._closedWindows[ix]._closedTabs; - let openTabs = this._closedWindows[ix].tabs; - let openTabCount = openTabs.length; - for (let i = closedTabs.length - 1; i >= 0; i--) - if (closedTabs[i].state.entries.some(containsDomain, this)) - closedTabs.splice(i, 1); - for (let j = openTabs.length - 1; j >= 0; j--) { - if (openTabs[j].entries.some(containsDomain, this)) { - openTabs.splice(j, 1); - if (this._closedWindows[ix].selected > j) - this._closedWindows[ix].selected--; - } - } - if (openTabs.length == 0) { - this._closedWindows.splice(ix, 1); - } - else if (openTabs.length != openTabCount) { - // Adjust the window's title if we removed an open tab - let selectedTab = openTabs[this._closedWindows[ix].selected - 1]; - // some duplication from restoreHistory - make sure we get the correct title - let activeIndex = (selectedTab.index || selectedTab.entries.length) - 1; - if (activeIndex >= selectedTab.entries.length) - activeIndex = selectedTab.entries.length - 1; - this._closedWindows[ix].title = selectedTab.entries[activeIndex].title; - } - } - - if (RunState.isRunning) { - SessionSaver.run(); - } - - this._clearRestoringWindows(); - }, - - /** - * On preference change - * @param aData - * String preference changed - */ - onPrefChange: function ssi_onPrefChange(aData) { - switch (aData) { - // if the user decreases the max number of closed tabs they want - // preserved update our internal states to match that max - case "sessionstore.max_tabs_undo": - this._max_tabs_undo = this._prefBranch.getIntPref("sessionstore.max_tabs_undo"); - for (let ix in this._windows) { - this._windows[ix]._closedTabs.splice(this._max_tabs_undo, this._windows[ix]._closedTabs.length); - } - break; - case "sessionstore.max_windows_undo": - this._max_windows_undo = this._prefBranch.getIntPref("sessionstore.max_windows_undo"); - this._capClosedWindows(); - break; - } - }, - - /** - * save state when new tab is added - * @param aWindow - * Window reference - */ - onTabAdd: function ssi_onTabAdd(aWindow) { - this.saveStateDelayed(aWindow); - }, - - /** - * set up listeners for a new tab - * @param aWindow - * Window reference - * @param aTab - * Tab reference - */ - onTabBrowserInserted: function ssi_onTabBrowserInserted(aWindow, aTab) { - let browser = aTab.linkedBrowser; - browser.addEventListener("SwapDocShells", this); - browser.addEventListener("oop-browser-crashed", this); - - if (browser.frameLoader) { - this._lastKnownFrameLoader.set(browser.permanentKey, browser.frameLoader); - } - }, - - /** - * remove listeners for a tab - * @param aWindow - * Window reference - * @param aTab - * Tab reference - * @param aNoNotification - * bool Do not save state if we're updating an existing tab - */ - onTabRemove: function ssi_onTabRemove(aWindow, aTab, aNoNotification) { - let browser = aTab.linkedBrowser; - browser.removeEventListener("SwapDocShells", this); - browser.removeEventListener("oop-browser-crashed", this); - - // If this tab was in the middle of restoring or still needs to be restored, - // we need to reset that state. If the tab was restoring, we will attempt to - // restore the next tab. - let previousState = browser.__SS_restoreState; - if (previousState) { - this._resetTabRestoringState(aTab); - if (previousState == TAB_STATE_RESTORING) - this.restoreNextTab(); - } - - if (!aNoNotification) { - this.saveStateDelayed(aWindow); - } - }, - - /** - * When a tab closes, collect its properties - * @param aWindow - * Window reference - * @param aTab - * Tab reference - */ - onTabClose: function ssi_onTabClose(aWindow, aTab) { - // notify the tabbrowser that the tab state will be retrieved for the last time - // (so that extension authors can easily set data on soon-to-be-closed tabs) - var event = aWindow.document.createEvent("Events"); - event.initEvent("SSTabClosing", true, false); - aTab.dispatchEvent(event); - - // don't update our internal state if we don't have to - if (this._max_tabs_undo == 0) { - return; - } - - // Get the latest data for this tab (generally, from the cache) - let tabState = TabState.collect(aTab); - - // Don't save private tabs - let isPrivateWindow = PrivateBrowsingUtils.isWindowPrivate(aWindow); - if (!isPrivateWindow && tabState.isPrivate) { - return; - } - - // Store closed-tab data for undo. - let tabbrowser = aWindow.gBrowser; - let tabTitle = this._replaceLoadingTitle(aTab.label, tabbrowser, aTab); - let {permanentKey} = aTab.linkedBrowser; - - let tabData = { - permanentKey, - state: tabState, - title: tabTitle, - image: tabbrowser.getIcon(aTab), - iconLoadingPrincipal: Utils.serializePrincipal(aTab.linkedBrowser.contentPrincipal), - pos: aTab._tPos, - closedAt: Date.now() - }; - - let closedTabs = this._windows[aWindow.__SSi]._closedTabs; - - // Determine whether the tab contains any information worth saving. Note - // that there might be pending state changes queued in the child that - // didn't reach the parent yet. If a tab is emptied before closing then we - // might still remove it from the list of closed tabs later. - if (this._shouldSaveTabState(tabState)) { - // Save the tab state, for now. We might push a valid tab out - // of the list but those cases should be extremely rare and - // do probably never occur when using the browser normally. - // (Tests or add-ons might do weird things though.) - this.saveClosedTabData(closedTabs, tabData); - } - - // Remember the closed tab to properly handle any last updates included in - // the final "update" message sent by the frame script's unload handler. - this._closedTabs.set(permanentKey, {closedTabs, tabData}); - }, - - /** - * Insert a given |tabData| object into the list of |closedTabs|. We will - * determine the right insertion point based on the .closedAt properties of - * all tabs already in the list. The list will be truncated to contain a - * maximum of |this._max_tabs_undo| entries. - * - * @param closedTabs (array) - * The list of closed tabs for a window. - * @param tabData (object) - * The tabData to be inserted. - */ - saveClosedTabData(closedTabs, tabData) { - // Find the index of the first tab in the list - // of closed tabs that was closed before our tab. - let index = closedTabs.findIndex(tab => { - return tab.closedAt < tabData.closedAt; - }); - - // If we found no tab closed before our - // tab then just append it to the list. - if (index == -1) { - index = closedTabs.length; - } - - // About to save the closed tab, add a unique ID. - tabData.closedId = this._nextClosedId++; - - // Insert tabData at the right position. - closedTabs.splice(index, 0, tabData); - - // Truncate the list of closed tabs, if needed. - if (closedTabs.length > this._max_tabs_undo) { - closedTabs.splice(this._max_tabs_undo, closedTabs.length); - } - }, - - /** - * Remove the closed tab data at |index| from the list of |closedTabs|. If - * the tab's final message is still pending we will simply discard it when - * it arrives so that the tab doesn't reappear in the list. - * - * @param closedTabs (array) - * The list of closed tabs for a window. - * @param index (uint) - * The index of the tab to remove. - */ - removeClosedTabData(closedTabs, index) { - // Remove the given index from the list. - let [closedTab] = closedTabs.splice(index, 1); - - // If the closed tab's state still has a .permanentKey property then we - // haven't seen its final update message yet. Remove it from the map of - // closed tabs so that we will simply discard its last messages and will - // not add it back to the list of closed tabs again. - if (closedTab.permanentKey) { - this._closedTabs.delete(closedTab.permanentKey); - this._closedWindowTabs.delete(closedTab.permanentKey); - delete closedTab.permanentKey; - } - - return closedTab; - }, - - /** - * When a tab is selected, save session data - * @param aWindow - * Window reference - */ - onTabSelect: function ssi_onTabSelect(aWindow) { - if (RunState.isRunning) { - this._windows[aWindow.__SSi].selected = aWindow.gBrowser.tabContainer.selectedIndex; - - let tab = aWindow.gBrowser.selectedTab; - let browser = tab.linkedBrowser; - - if (browser.__SS_restoreState && - browser.__SS_restoreState == TAB_STATE_NEEDS_RESTORE) { - // If __SS_restoreState is still on the browser and it is - // TAB_STATE_NEEDS_RESTORE, then then we haven't restored - // this tab yet. - // - // It's possible that this tab was recently revived, and that - // we've deferred showing the tab crashed page for it (if the - // tab crashed in the background). If so, we need to re-enter - // the crashed state, since we'll be showing the tab crashed - // page. - if (TabCrashHandler.willShowCrashedTab(browser)) { - this.enterCrashedState(browser); - } else { - this.restoreTabContent(tab); - } - } - } - }, - - onTabShow: function ssi_onTabShow(aWindow, aTab) { - // If the tab hasn't been restored yet, move it into the right bucket - if (aTab.linkedBrowser.__SS_restoreState && - aTab.linkedBrowser.__SS_restoreState == TAB_STATE_NEEDS_RESTORE) { - TabRestoreQueue.hiddenToVisible(aTab); - - // let's kick off tab restoration again to ensure this tab gets restored - // with "restore_hidden_tabs" == false (now that it has become visible) - this.restoreNextTab(); - } - - // Default delay of 2 seconds gives enough time to catch multiple TabShow - // events. This used to be due to changing groups in 'tab groups'. We - // might be able to get rid of this now? - this.saveStateDelayed(aWindow); - }, - - onTabHide: function ssi_onTabHide(aWindow, aTab) { - // If the tab hasn't been restored yet, move it into the right bucket - if (aTab.linkedBrowser.__SS_restoreState && - aTab.linkedBrowser.__SS_restoreState == TAB_STATE_NEEDS_RESTORE) { - TabRestoreQueue.visibleToHidden(aTab); - } - - // Default delay of 2 seconds gives enough time to catch multiple TabHide - // events. This used to be due to changing groups in 'tab groups'. We - // might be able to get rid of this now? - this.saveStateDelayed(aWindow); - }, - - /** - * Handler for the event that is fired when a <xul:browser> crashes. - * - * @param aWindow - * The window that the crashed browser belongs to. - * @param aBrowser - * The <xul:browser> that is now in the crashed state. - */ - onBrowserCrashed: function(aBrowser) { - NS_ASSERT(aBrowser.isRemoteBrowser, - "Only remote browsers should be able to crash"); - - this.enterCrashedState(aBrowser); - // The browser crashed so we might never receive flush responses. - // Resolve all pending flush requests for the crashed browser. - TabStateFlusher.resolveAll(aBrowser); - }, - - /** - * Called when a browser is showing or is about to show the tab - * crashed page. This method causes SessionStore to ignore the - * tab until it's restored. - * - * @param browser - * The <xul:browser> that is about to show the crashed page. - */ - enterCrashedState(browser) { - this._crashedBrowsers.add(browser.permanentKey); - - let win = browser.ownerGlobal; - - // If we hadn't yet restored, or were still in the midst of - // restoring this browser at the time of the crash, we need - // to reset its state so that we can try to restore it again - // when the user revives the tab from the crash. - if (browser.__SS_restoreState) { - let tab = win.gBrowser.getTabForBrowser(browser); - this._resetLocalTabRestoringState(tab); - } - }, - - // Clean up data that has been closed a long time ago. - // Do not reschedule a save. This will wait for the next regular - // save. - onIdleDaily: function() { - // Remove old closed windows - this._cleanupOldData([this._closedWindows]); - - // Remove closed tabs of closed windows - this._cleanupOldData(this._closedWindows.map((winData) => winData._closedTabs)); - - // Remove closed tabs of open windows - this._cleanupOldData(Object.keys(this._windows).map((key) => this._windows[key]._closedTabs)); - }, - - // Remove "old" data from an array - _cleanupOldData: function(targets) { - const TIME_TO_LIVE = this._prefBranch.getIntPref("sessionstore.cleanup.forget_closed_after"); - const now = Date.now(); - - for (let array of targets) { - for (let i = array.length - 1; i >= 0; --i) { - let data = array[i]; - // Make sure that we have a timestamp to tell us when the target - // has been closed. If we don't have a timestamp, default to a - // safe timestamp: just now. - data.closedAt = data.closedAt || now; - if (now - data.closedAt > TIME_TO_LIVE) { - array.splice(i, 1); - } - } - } - }, - - /* ........ nsISessionStore API .............. */ - - getBrowserState: function ssi_getBrowserState() { - let state = this.getCurrentState(); - - // Don't include the last session state in getBrowserState(). - delete state.lastSessionState; - - // Don't include any deferred initial state. - delete state.deferredInitialState; - - return JSON.stringify(state); - }, - - setBrowserState: function ssi_setBrowserState(aState) { - this._handleClosedWindows(); - - try { - var state = JSON.parse(aState); - } - catch (ex) { /* invalid state object - don't restore anything */ } - if (!state) { - throw Components.Exception("Invalid state string: not JSON", Cr.NS_ERROR_INVALID_ARG); - } - if (!state.windows) { - throw Components.Exception("No windows", Cr.NS_ERROR_INVALID_ARG); - } - - this._browserSetState = true; - - // Make sure the priority queue is emptied out - this._resetRestoringState(); - - var window = this._getMostRecentBrowserWindow(); - if (!window) { - this._restoreCount = 1; - this._openWindowWithState(state); - return; - } - - // close all other browser windows - this._forEachBrowserWindow(function(aWindow) { - if (aWindow != window) { - aWindow.close(); - this.onClose(aWindow); - } - }); - - // make sure closed window data isn't kept - this._closedWindows = []; - - // determine how many windows are meant to be restored - this._restoreCount = state.windows ? state.windows.length : 0; - - // global data must be restored before restoreWindow is called so that - // it happens before observers are notified - this._globalState.setFromState(state); - - // restore to the given state - this.restoreWindows(window, state, {overwriteTabs: true}); - }, - - getWindowState: function ssi_getWindowState(aWindow) { - if ("__SSi" in aWindow) { - return JSON.stringify(this._getWindowState(aWindow)); - } - - if (DyingWindowCache.has(aWindow)) { - let data = DyingWindowCache.get(aWindow); - return JSON.stringify({ windows: [data] }); - } - - throw Components.Exception("Window is not tracked", Cr.NS_ERROR_INVALID_ARG); - }, - - setWindowState: function ssi_setWindowState(aWindow, aState, aOverwrite) { - if (!aWindow.__SSi) { - throw Components.Exception("Window is not tracked", Cr.NS_ERROR_INVALID_ARG); - } - - this.restoreWindows(aWindow, aState, {overwriteTabs: aOverwrite}); - }, - - getTabState: function ssi_getTabState(aTab) { - if (!aTab.ownerGlobal.__SSi) { - throw Components.Exception("Default view is not tracked", Cr.NS_ERROR_INVALID_ARG); - } - - let tabState = TabState.collect(aTab); - - return JSON.stringify(tabState); - }, - - setTabState(aTab, aState) { - // Remove the tab state from the cache. - // Note that we cannot simply replace the contents of the cache - // as |aState| can be an incomplete state that will be completed - // by |restoreTabs|. - let tabState = JSON.parse(aState); - if (!tabState) { - throw Components.Exception("Invalid state string: not JSON", Cr.NS_ERROR_INVALID_ARG); - } - if (typeof tabState != "object") { - throw Components.Exception("Not an object", Cr.NS_ERROR_INVALID_ARG); - } - if (!("entries" in tabState)) { - throw Components.Exception("Invalid state object: no entries", Cr.NS_ERROR_INVALID_ARG); - } - - let window = aTab.ownerGlobal; - if (!("__SSi" in window)) { - throw Components.Exception("Window is not tracked", Cr.NS_ERROR_INVALID_ARG); - } - - if (aTab.linkedBrowser.__SS_restoreState) { - this._resetTabRestoringState(aTab); - } - - this.restoreTab(aTab, tabState); - }, - - duplicateTab: function ssi_duplicateTab(aWindow, aTab, aDelta = 0, aRestoreImmediately = true) { - if (!aTab.ownerGlobal.__SSi) { - throw Components.Exception("Default view is not tracked", Cr.NS_ERROR_INVALID_ARG); - } - if (!aWindow.gBrowser) { - throw Components.Exception("Invalid window object: no gBrowser", Cr.NS_ERROR_INVALID_ARG); - } - - // Create a new tab. - let userContextId = aTab.getAttribute("usercontextid"); - let newTab = aTab == aWindow.gBrowser.selectedTab ? - aWindow.gBrowser.addTab(null, {relatedToCurrent: true, ownerTab: aTab, userContextId}) : - aWindow.gBrowser.addTab(null, {userContextId}); - - // Set tab title to "Connecting..." and start the throbber to pretend we're - // doing something while actually waiting for data from the frame script. - aWindow.gBrowser.setTabTitleLoading(newTab); - newTab.setAttribute("busy", "true"); - - // Collect state before flushing. - let tabState = TabState.clone(aTab); - - // Flush to get the latest tab state to duplicate. - let browser = aTab.linkedBrowser; - TabStateFlusher.flush(browser).then(() => { - // The new tab might have been closed in the meantime. - if (newTab.closing || !newTab.linkedBrowser) { - return; - } - - let window = newTab.ownerGlobal; - - // The tab or its window might be gone. - if (!window || !window.__SSi) { - return; - } - - // Update state with flushed data. We can't use TabState.clone() here as - // the tab to duplicate may have already been closed. In that case we - // only have access to the <xul:browser>. - let options = {includePrivateData: true}; - TabState.copyFromCache(browser, tabState, options); - - tabState.index += aDelta; - tabState.index = Math.max(1, Math.min(tabState.index, tabState.entries.length)); - tabState.pinned = false; - - // Restore the state into the new tab. - this.restoreTab(newTab, tabState, { - restoreImmediately: aRestoreImmediately - }); - }); - - return newTab; - }, - - getClosedTabCount: function ssi_getClosedTabCount(aWindow) { - if ("__SSi" in aWindow) { - return this._windows[aWindow.__SSi]._closedTabs.length; - } - - if (!DyingWindowCache.has(aWindow)) { - throw Components.Exception("Window is not tracked", Cr.NS_ERROR_INVALID_ARG); - } - - return DyingWindowCache.get(aWindow)._closedTabs.length; - }, - - getClosedTabData: function ssi_getClosedTabData(aWindow, aAsString = true) { - if ("__SSi" in aWindow) { - return aAsString ? - JSON.stringify(this._windows[aWindow.__SSi]._closedTabs) : - Cu.cloneInto(this._windows[aWindow.__SSi]._closedTabs, {}); - } - - if (!DyingWindowCache.has(aWindow)) { - throw Components.Exception("Window is not tracked", Cr.NS_ERROR_INVALID_ARG); - } - - let data = DyingWindowCache.get(aWindow); - return aAsString ? JSON.stringify(data._closedTabs) : Cu.cloneInto(data._closedTabs, {}); - }, - - undoCloseTab: function ssi_undoCloseTab(aWindow, aIndex) { - if (!aWindow.__SSi) { - throw Components.Exception("Window is not tracked", Cr.NS_ERROR_INVALID_ARG); - } - - var closedTabs = this._windows[aWindow.__SSi]._closedTabs; - - // default to the most-recently closed tab - aIndex = aIndex || 0; - if (!(aIndex in closedTabs)) { - throw Components.Exception("Invalid index: not in the closed tabs", Cr.NS_ERROR_INVALID_ARG); - } - - // fetch the data of closed tab, while removing it from the array - let {state, pos} = this.removeClosedTabData(closedTabs, aIndex); - - // create a new tab - let tabbrowser = aWindow.gBrowser; - let tab = tabbrowser.selectedTab = tabbrowser.addTab(null, state); - - // restore tab content - this.restoreTab(tab, state); - - // restore the tab's position - tabbrowser.moveTabTo(tab, pos); - - // focus the tab's content area (bug 342432) - tab.linkedBrowser.focus(); - - return tab; - }, - - forgetClosedTab: function ssi_forgetClosedTab(aWindow, aIndex) { - if (!aWindow.__SSi) { - throw Components.Exception("Window is not tracked", Cr.NS_ERROR_INVALID_ARG); - } - - var closedTabs = this._windows[aWindow.__SSi]._closedTabs; - - // default to the most-recently closed tab - aIndex = aIndex || 0; - if (!(aIndex in closedTabs)) { - throw Components.Exception("Invalid index: not in the closed tabs", Cr.NS_ERROR_INVALID_ARG); - } - - // remove closed tab from the array - this.removeClosedTabData(closedTabs, aIndex); - }, - - getClosedWindowCount: function ssi_getClosedWindowCount() { - return this._closedWindows.length; - }, - - getClosedWindowData: function ssi_getClosedWindowData(aAsString = true) { - return aAsString ? JSON.stringify(this._closedWindows) : Cu.cloneInto(this._closedWindows, {}); - }, - - undoCloseWindow: function ssi_undoCloseWindow(aIndex) { - if (!(aIndex in this._closedWindows)) { - throw Components.Exception("Invalid index: not in the closed windows", Cr.NS_ERROR_INVALID_ARG); - } - - // reopen the window - let state = { windows: this._closedWindows.splice(aIndex, 1) }; - delete state.windows[0].closedAt; // Window is now open. - - let window = this._openWindowWithState(state); - this.windowToFocus = window; - return window; - }, - - forgetClosedWindow: function ssi_forgetClosedWindow(aIndex) { - // default to the most-recently closed window - aIndex = aIndex || 0; - if (!(aIndex in this._closedWindows)) { - throw Components.Exception("Invalid index: not in the closed windows", Cr.NS_ERROR_INVALID_ARG); - } - - // remove closed window from the array - let winData = this._closedWindows[aIndex]; - this._closedWindows.splice(aIndex, 1); - this._saveableClosedWindowData.delete(winData); - }, - - getWindowValue: function ssi_getWindowValue(aWindow, aKey) { - if ("__SSi" in aWindow) { - var data = this._windows[aWindow.__SSi].extData || {}; - return data[aKey] || ""; - } - - if (DyingWindowCache.has(aWindow)) { - let data = DyingWindowCache.get(aWindow).extData || {}; - return data[aKey] || ""; - } - - throw Components.Exception("Window is not tracked", Cr.NS_ERROR_INVALID_ARG); - }, - - setWindowValue: function ssi_setWindowValue(aWindow, aKey, aStringValue) { - if (typeof aStringValue != "string") { - throw new TypeError("setWindowValue only accepts string values"); - } - - if (!("__SSi" in aWindow)) { - throw Components.Exception("Window is not tracked", Cr.NS_ERROR_INVALID_ARG); - } - if (!this._windows[aWindow.__SSi].extData) { - this._windows[aWindow.__SSi].extData = {}; - } - this._windows[aWindow.__SSi].extData[aKey] = aStringValue; - this.saveStateDelayed(aWindow); - }, - - deleteWindowValue: function ssi_deleteWindowValue(aWindow, aKey) { - if (aWindow.__SSi && this._windows[aWindow.__SSi].extData && - this._windows[aWindow.__SSi].extData[aKey]) - delete this._windows[aWindow.__SSi].extData[aKey]; - this.saveStateDelayed(aWindow); - }, - - getTabValue: function ssi_getTabValue(aTab, aKey) { - return (aTab.__SS_extdata || {})[aKey] || ""; - }, - - setTabValue: function ssi_setTabValue(aTab, aKey, aStringValue) { - if (typeof aStringValue != "string") { - throw new TypeError("setTabValue only accepts string values"); - } - - // If the tab hasn't been restored, then set the data there, otherwise we - // could lose newly added data. - if (!aTab.__SS_extdata) { - aTab.__SS_extdata = {}; - } - - aTab.__SS_extdata[aKey] = aStringValue; - this.saveStateDelayed(aTab.ownerGlobal); - }, - - deleteTabValue: function ssi_deleteTabValue(aTab, aKey) { - if (aTab.__SS_extdata && aKey in aTab.__SS_extdata) { - delete aTab.__SS_extdata[aKey]; - this.saveStateDelayed(aTab.ownerGlobal); - } - }, - - getGlobalValue: function ssi_getGlobalValue(aKey) { - return this._globalState.get(aKey); - }, - - setGlobalValue: function ssi_setGlobalValue(aKey, aStringValue) { - if (typeof aStringValue != "string") { - throw new TypeError("setGlobalValue only accepts string values"); - } - - this._globalState.set(aKey, aStringValue); - this.saveStateDelayed(); - }, - - deleteGlobalValue: function ssi_deleteGlobalValue(aKey) { - this._globalState.delete(aKey); - this.saveStateDelayed(); - }, - - persistTabAttribute: function ssi_persistTabAttribute(aName) { - if (TabAttributes.persist(aName)) { - this.saveStateDelayed(); - } - }, - - - /** - * Undoes the closing of a tab or window which corresponds - * to the closedId passed in. - * - * @param aClosedId - * The closedId of the tab or window - * - * @returns a tab or window object - */ - undoCloseById(aClosedId) { - // Check for a window first. - for (let i = 0, l = this._closedWindows.length; i < l; i++) { - if (this._closedWindows[i].closedId == aClosedId) { - return this.undoCloseWindow(i); - } - } - - // Check for a tab. - let windowsEnum = Services.wm.getEnumerator("navigator:browser"); - while (windowsEnum.hasMoreElements()) { - let window = windowsEnum.getNext(); - let windowState = this._windows[window.__SSi]; - if (windowState) { - for (let j = 0, l = windowState._closedTabs.length; j < l; j++) { - if (windowState._closedTabs[j].closedId == aClosedId) { - return this.undoCloseTab(window, j); - } - } - } - } - - // Neither a tab nor a window was found, return undefined and let the caller decide what to do about it. - return undefined; - }, - - /** - * Restores the session state stored in LastSession. This will attempt - * to merge data into the current session. If a window was opened at startup - * with pinned tab(s), then the remaining data from the previous session for - * that window will be opened into that window. Otherwise new windows will - * be opened. - */ - restoreLastSession: function ssi_restoreLastSession() { - // Use the public getter since it also checks PB mode - if (!this.canRestoreLastSession) { - throw Components.Exception("Last session can not be restored"); - } - - Services.obs.notifyObservers(null, NOTIFY_INITIATING_MANUAL_RESTORE, ""); - - // First collect each window with its id... - let windows = {}; - this._forEachBrowserWindow(function(aWindow) { - if (aWindow.__SS_lastSessionWindowID) - windows[aWindow.__SS_lastSessionWindowID] = aWindow; - }); - - let lastSessionState = LastSession.getState(); - - // This shouldn't ever be the case... - if (!lastSessionState.windows.length) { - throw Components.Exception("lastSessionState has no windows", Cr.NS_ERROR_UNEXPECTED); - } - - // We're technically doing a restore, so set things up so we send the - // notification when we're done. We want to send "sessionstore-browser-state-restored". - this._restoreCount = lastSessionState.windows.length; - this._browserSetState = true; - - // We want to re-use the last opened window instead of opening a new one in - // the case where it's "empty" and not associated with a window in the session. - // We will do more processing via _prepWindowToRestoreInto if we need to use - // the lastWindow. - let lastWindow = this._getMostRecentBrowserWindow(); - let canUseLastWindow = lastWindow && - !lastWindow.__SS_lastSessionWindowID; - - // global data must be restored before restoreWindow is called so that - // it happens before observers are notified - this._globalState.setFromState(lastSessionState); - - // Restore into windows or open new ones as needed. - for (let i = 0; i < lastSessionState.windows.length; i++) { - let winState = lastSessionState.windows[i]; - let lastSessionWindowID = winState.__lastSessionWindowID; - // delete lastSessionWindowID so we don't add that to the window again - delete winState.__lastSessionWindowID; - - // See if we can use an open window. First try one that is associated with - // the state we're trying to restore and then fallback to the last selected - // window. - let windowToUse = windows[lastSessionWindowID]; - if (!windowToUse && canUseLastWindow) { - windowToUse = lastWindow; - canUseLastWindow = false; - } - - let [canUseWindow, canOverwriteTabs] = this._prepWindowToRestoreInto(windowToUse); - - // If there's a window already open that we can restore into, use that - if (canUseWindow) { - // Since we're not overwriting existing tabs, we want to merge _closedTabs, - // putting existing ones first. Then make sure we're respecting the max pref. - if (winState._closedTabs && winState._closedTabs.length) { - let curWinState = this._windows[windowToUse.__SSi]; - curWinState._closedTabs = curWinState._closedTabs.concat(winState._closedTabs); - curWinState._closedTabs.splice(this._max_tabs_undo, curWinState._closedTabs.length); - } - - // Restore into that window - pretend it's a followup since we'll already - // have a focused window. - //XXXzpao This is going to merge extData together (taking what was in - // winState over what is in the window already. - let options = {overwriteTabs: canOverwriteTabs, isFollowUp: true}; - this.restoreWindow(windowToUse, winState, options); - } - else { - this._openWindowWithState({ windows: [winState] }); - } - } - - // Merge closed windows from this session with ones from last session - if (lastSessionState._closedWindows) { - this._closedWindows = this._closedWindows.concat(lastSessionState._closedWindows); - this._capClosedWindows(); - } - - // Scratchpad - if (lastSessionState.scratchpads) { - ScratchpadManager.restoreSession(lastSessionState.scratchpads); - } - - // The Browser Console - if (lastSessionState.browserConsole) { - HUDService.restoreBrowserConsoleSession(); - } - - // Set data that persists between sessions - this._recentCrashes = lastSessionState.session && - lastSessionState.session.recentCrashes || 0; - - // Update the session start time using the restored session state. - this._updateSessionStartTime(lastSessionState); - - LastSession.clear(); - }, - - /** - * Revive a crashed tab and restore its state from before it crashed. - * - * @param aTab - * A <xul:tab> linked to a crashed browser. This is a no-op if the - * browser hasn't actually crashed, or is not associated with a tab. - * This function will also throw if the browser happens to be remote. - */ - reviveCrashedTab(aTab) { - if (!aTab) { - throw new Error("SessionStore.reviveCrashedTab expected a tab, but got null."); - } - - let browser = aTab.linkedBrowser; - if (!this._crashedBrowsers.has(browser.permanentKey)) { - return; - } - - // Sanity check - the browser to be revived should not be remote - // at this point. - if (browser.isRemoteBrowser) { - throw new Error("SessionStore.reviveCrashedTab: " + - "Somehow a crashed browser is still remote.") - } - - // We put the browser at about:blank in case the user is - // restoring tabs on demand. This way, the user won't see - // a flash of the about:tabcrashed page after selecting - // the revived tab. - aTab.removeAttribute("crashed"); - browser.loadURI("about:blank", null, null); - - let data = TabState.collect(aTab); - this.restoreTab(aTab, data, { - forceOnDemand: true, - }); - }, - - /** - * Revive all crashed tabs and reset the crashed tabs count to 0. - */ - reviveAllCrashedTabs() { - let windowsEnum = Services.wm.getEnumerator("navigator:browser"); - while (windowsEnum.hasMoreElements()) { - let window = windowsEnum.getNext(); - for (let tab of window.gBrowser.tabs) { - this.reviveCrashedTab(tab); - } - } - }, - - /** - * Navigate the given |tab| by first collecting its current state and then - * either changing only the index of the currently shown history entry, - * or restoring the exact same state again and passing the new URL to load - * in |loadArguments|. Use this method to seamlessly switch between pages - * loaded in the parent and pages loaded in the child process. - * - * This method might be called multiple times before it has finished - * flushing the browser tab. If that occurs, the loadArguments from - * the most recent call to navigateAndRestore will be used once the - * flush has finished. - */ - navigateAndRestore(tab, loadArguments, historyIndex) { - let window = tab.ownerGlobal; - NS_ASSERT(window.__SSi, "tab's window must be tracked"); - let browser = tab.linkedBrowser; - - // Were we already waiting for a flush from a previous call to - // navigateAndRestore on this tab? - let alreadyRestoring = - this._remotenessChangingBrowsers.has(browser.permanentKey); - - // Stash the most recent loadArguments in this WeakMap so that - // we know to use it when the TabStateFlusher.flush resolves. - this._remotenessChangingBrowsers.set(browser.permanentKey, loadArguments); - - if (alreadyRestoring) { - // This tab was already being restored to run in the - // correct process. We're done here. - return; - } - - // Set tab title to "Connecting..." and start the throbber to pretend we're - // doing something while actually waiting for data from the frame script. - window.gBrowser.setTabTitleLoading(tab); - tab.setAttribute("busy", "true"); - - // Flush to get the latest tab state. - TabStateFlusher.flush(browser).then(() => { - // loadArguments might have been overwritten by multiple calls - // to navigateAndRestore while we waited for the tab to flush, - // so we use the most recently stored one. - let recentLoadArguments = - this._remotenessChangingBrowsers.get(browser.permanentKey); - this._remotenessChangingBrowsers.delete(browser.permanentKey); - - // The tab might have been closed/gone in the meantime. - if (tab.closing || !tab.linkedBrowser) { - return; - } - - let window = tab.ownerGlobal; - - // The tab or its window might be gone. - if (!window || !window.__SSi || window.closed) { - return; - } - - let tabState = TabState.clone(tab); - let options = { - restoreImmediately: true, - // We want to make sure that this information is passed to restoreTab - // whether or not a historyIndex is passed in. Thus, we extract it from - // the loadArguments. - reloadInFreshProcess: !!recentLoadArguments.reloadInFreshProcess, - }; - - if (historyIndex >= 0) { - tabState.index = historyIndex + 1; - tabState.index = Math.max(1, Math.min(tabState.index, tabState.entries.length)); - } else { - options.loadArguments = recentLoadArguments; - } - - // Need to reset restoring tabs. - if (tab.linkedBrowser.__SS_restoreState) { - this._resetLocalTabRestoringState(tab); - } - - // Restore the state into the tab. - this.restoreTab(tab, tabState, options); - }); - - tab.linkedBrowser.__SS_restoreState = TAB_STATE_WILL_RESTORE; - }, - - /** - * Retrieves the latest session history information for a tab. The cached data - * is returned immediately, but a callback may be provided that supplies - * up-to-date data when or if it is available. The callback is passed a single - * argument with data in the same format as the return value. - * - * @param tab tab to retrieve the session history for - * @param updatedCallback function to call with updated data as the single argument - * @returns a object containing 'index' specifying the current index, and an - * array 'entries' containing an object for each history item. - */ - getSessionHistory(tab, updatedCallback) { - if (updatedCallback) { - TabStateFlusher.flush(tab.linkedBrowser).then(() => { - let sessionHistory = this.getSessionHistory(tab); - if (sessionHistory) { - updatedCallback(sessionHistory); - } - }); - } - - // Don't continue if the tab was closed before TabStateFlusher.flush resolves. - if (tab.linkedBrowser) { - let tabState = TabState.collect(tab); - return { index: tabState.index - 1, entries: tabState.entries } - } - }, - - /** - * See if aWindow is usable for use when restoring a previous session via - * restoreLastSession. If usable, prepare it for use. - * - * @param aWindow - * the window to inspect & prepare - * @returns [canUseWindow, canOverwriteTabs] - * canUseWindow: can the window be used to restore into - * canOverwriteTabs: all of the current tabs are home pages and we - * can overwrite them - */ - _prepWindowToRestoreInto: function ssi_prepWindowToRestoreInto(aWindow) { - if (!aWindow) - return [false, false]; - - // We might be able to overwrite the existing tabs instead of just adding - // the previous session's tabs to the end. This will be set if possible. - let canOverwriteTabs = false; - - // Look at the open tabs in comparison to home pages. If all the tabs are - // home pages then we'll end up overwriting all of them. Otherwise we'll - // just close the tabs that match home pages. Tabs with the about:blank - // URI will always be overwritten. - let homePages = ["about:blank"]; - let removableTabs = []; - let tabbrowser = aWindow.gBrowser; - let normalTabsLen = tabbrowser.tabs.length - tabbrowser._numPinnedTabs; - let startupPref = this._prefBranch.getIntPref("startup.page"); - if (startupPref == 1) - homePages = homePages.concat(aWindow.gHomeButton.getHomePage().split("|")); - - for (let i = tabbrowser._numPinnedTabs; i < tabbrowser.tabs.length; i++) { - let tab = tabbrowser.tabs[i]; - if (homePages.indexOf(tab.linkedBrowser.currentURI.spec) != -1) { - removableTabs.push(tab); - } - } - - if (tabbrowser.tabs.length == removableTabs.length) { - canOverwriteTabs = true; - } - else { - // If we're not overwriting all of the tabs, then close the home tabs. - for (let i = removableTabs.length - 1; i >= 0; i--) { - tabbrowser.removeTab(removableTabs.pop(), { animate: false }); - } - } - - return [true, canOverwriteTabs]; - }, - - /* ........ Saving Functionality .............. */ - - /** - * Store window dimensions, visibility, sidebar - * @param aWindow - * Window reference - */ - _updateWindowFeatures: function ssi_updateWindowFeatures(aWindow) { - var winData = this._windows[aWindow.__SSi]; - - WINDOW_ATTRIBUTES.forEach(function(aAttr) { - winData[aAttr] = this._getWindowDimension(aWindow, aAttr); - }, this); - - var hidden = WINDOW_HIDEABLE_FEATURES.filter(function(aItem) { - return aWindow[aItem] && !aWindow[aItem].visible; - }); - if (hidden.length != 0) - winData.hidden = hidden.join(","); - else if (winData.hidden) - delete winData.hidden; - - var sidebar = aWindow.document.getElementById("sidebar-box").getAttribute("sidebarcommand"); - if (sidebar) - winData.sidebar = sidebar; - else if (winData.sidebar) - delete winData.sidebar; - }, - - /** - * gather session data as object - * @param aUpdateAll - * Bool update all windows - * @returns object - */ - getCurrentState: function (aUpdateAll) { - this._handleClosedWindows(); - - var activeWindow = this._getMostRecentBrowserWindow(); - - TelemetryStopwatch.start("FX_SESSION_RESTORE_COLLECT_ALL_WINDOWS_DATA_MS"); - if (RunState.isRunning) { - // update the data for all windows with activities since the last save operation - this._forEachBrowserWindow(function(aWindow) { - if (!this._isWindowLoaded(aWindow)) // window data is still in _statesToRestore - return; - if (aUpdateAll || DirtyWindows.has(aWindow) || aWindow == activeWindow) { - this._collectWindowData(aWindow); - } - else { // always update the window features (whose change alone never triggers a save operation) - this._updateWindowFeatures(aWindow); - } - }); - DirtyWindows.clear(); - } - TelemetryStopwatch.finish("FX_SESSION_RESTORE_COLLECT_ALL_WINDOWS_DATA_MS"); - - // An array that at the end will hold all current window data. - var total = []; - // The ids of all windows contained in 'total' in the same order. - var ids = []; - // The number of window that are _not_ popups. - var nonPopupCount = 0; - var ix; - - // collect the data for all windows - for (ix in this._windows) { - if (this._windows[ix]._restoring) // window data is still in _statesToRestore - continue; - total.push(this._windows[ix]); - ids.push(ix); - if (!this._windows[ix].isPopup) - nonPopupCount++; - } - - TelemetryStopwatch.start("FX_SESSION_RESTORE_COLLECT_COOKIES_MS"); - SessionCookies.update(total); - TelemetryStopwatch.finish("FX_SESSION_RESTORE_COLLECT_COOKIES_MS"); - - // collect the data for all windows yet to be restored - for (ix in this._statesToRestore) { - for (let winData of this._statesToRestore[ix].windows) { - total.push(winData); - if (!winData.isPopup) - nonPopupCount++; - } - } - - // shallow copy this._closedWindows to preserve current state - let lastClosedWindowsCopy = this._closedWindows.slice(); - - if (AppConstants.platform != "macosx") { - // If no non-popup browser window remains open, return the state of the last - // closed window(s). We only want to do this when we're actually "ending" - // the session. - //XXXzpao We should do this for _restoreLastWindow == true, but that has - // its own check for popups. c.f. bug 597619 - if (nonPopupCount == 0 && lastClosedWindowsCopy.length > 0 && - RunState.isQuitting) { - // prepend the last non-popup browser window, so that if the user loads more tabs - // at startup we don't accidentally add them to a popup window - do { - total.unshift(lastClosedWindowsCopy.shift()) - } while (total[0].isPopup && lastClosedWindowsCopy.length > 0) - } - } - - if (activeWindow) { - this.activeWindowSSiCache = activeWindow.__SSi || ""; - } - ix = ids.indexOf(this.activeWindowSSiCache); - // We don't want to restore focus to a minimized window or a window which had all its - // tabs stripped out (doesn't exist). - if (ix != -1 && total[ix] && total[ix].sizemode == "minimized") - ix = -1; - - let session = { - lastUpdate: Date.now(), - startTime: this._sessionStartTime, - recentCrashes: this._recentCrashes - }; - - let state = { - version: ["sessionrestore", FORMAT_VERSION], - windows: total, - selectedWindow: ix + 1, - _closedWindows: lastClosedWindowsCopy, - session: session, - global: this._globalState.getState() - }; - - // Scratchpad - if (Cu.isModuleLoaded("resource://devtools/client/scratchpad/scratchpad-manager.jsm")) { - // get open Scratchpad window states too - let scratchpads = ScratchpadManager.getSessionState(); - if (scratchpads && scratchpads.length) { - state.scratchpads = scratchpads; - } - } - - // The Browser Console - state.browserConsole = HUDService.getBrowserConsoleSessionState(); - - // Persist the last session if we deferred restoring it - if (LastSession.canRestore) { - state.lastSessionState = LastSession.getState(); - } - - // If we were called by the SessionSaver and started with only a private - // window we want to pass the deferred initial state to not lose the - // previous session. - if (this._deferredInitialState) { - state.deferredInitialState = this._deferredInitialState; - } - - return state; - }, - - /** - * serialize session data for a window - * @param aWindow - * Window reference - * @returns string - */ - _getWindowState: function ssi_getWindowState(aWindow) { - if (!this._isWindowLoaded(aWindow)) - return this._statesToRestore[aWindow.__SS_restoreID]; - - if (RunState.isRunning) { - this._collectWindowData(aWindow); - } - - let windows = [this._windows[aWindow.__SSi]]; - SessionCookies.update(windows); - - return { windows: windows }; - }, - - /** - * Gathers data about a window and its tabs, and updates its - * entry in this._windows. - * - * @param aWindow - * Window references. - * @returns a Map mapping the browser tabs from aWindow to the tab - * entry that was put into the window data in this._windows. - */ - _collectWindowData: function ssi_collectWindowData(aWindow) { - let tabMap = new Map(); - - if (!this._isWindowLoaded(aWindow)) - return tabMap; - - let tabbrowser = aWindow.gBrowser; - let tabs = tabbrowser.tabs; - let winData = this._windows[aWindow.__SSi]; - let tabsData = winData.tabs = []; - - // update the internal state data for this window - for (let tab of tabs) { - let tabData = TabState.collect(tab); - tabMap.set(tab, tabData); - tabsData.push(tabData); - } - winData.selected = tabbrowser.mTabBox.selectedIndex + 1; - - this._updateWindowFeatures(aWindow); - - // Make sure we keep __SS_lastSessionWindowID around for cases like entering - // or leaving PB mode. - if (aWindow.__SS_lastSessionWindowID) - this._windows[aWindow.__SSi].__lastSessionWindowID = - aWindow.__SS_lastSessionWindowID; - - DirtyWindows.remove(aWindow); - return tabMap; - }, - - /* ........ Restoring Functionality .............. */ - - /** - * restore features to a single window - * @param aWindow - * Window reference to the window to use for restoration - * @param winData - * JS object - * @param aOptions - * {overwriteTabs: true} to overwrite existing tabs w/ new ones - * {isFollowUp: true} if this is not the restoration of the 1st window - * {firstWindow: true} if this is the first non-private window we're - * restoring in this session, that might open an - * external link as well - */ - restoreWindow: function ssi_restoreWindow(aWindow, winData, aOptions = {}) { - let overwriteTabs = aOptions && aOptions.overwriteTabs; - let isFollowUp = aOptions && aOptions.isFollowUp; - let firstWindow = aOptions && aOptions.firstWindow; - - if (isFollowUp) { - this.windowToFocus = aWindow; - } - - // initialize window if necessary - if (aWindow && (!aWindow.__SSi || !this._windows[aWindow.__SSi])) - this.onLoad(aWindow); - - TelemetryStopwatch.start("FX_SESSION_RESTORE_RESTORE_WINDOW_MS"); - - // We're not returning from this before we end up calling restoreTabs - // for this window, so make sure we send the SSWindowStateBusy event. - this._setWindowStateBusy(aWindow); - - if (!winData.tabs) { - winData.tabs = []; - } - - // don't restore a single blank tab when we've had an external - // URL passed in for loading at startup (cf. bug 357419) - else if (firstWindow && !overwriteTabs && winData.tabs.length == 1 && - (!winData.tabs[0].entries || winData.tabs[0].entries.length == 0)) { - winData.tabs = []; - } - - var tabbrowser = aWindow.gBrowser; - var openTabCount = overwriteTabs ? tabbrowser.browsers.length : -1; - var newTabCount = winData.tabs.length; - var tabs = []; - - // disable smooth scrolling while adding, moving, removing and selecting tabs - var tabstrip = tabbrowser.tabContainer.mTabstrip; - var smoothScroll = tabstrip.smoothScroll; - tabstrip.smoothScroll = false; - - // unpin all tabs to ensure they are not reordered in the next loop - if (overwriteTabs) { - for (let t = tabbrowser._numPinnedTabs - 1; t > -1; t--) - tabbrowser.unpinTab(tabbrowser.tabs[t]); - } - - // We need to keep track of the initially open tabs so that they - // can be moved to the end of the restored tabs. - let initialTabs = []; - if (!overwriteTabs && firstWindow) { - initialTabs = Array.slice(tabbrowser.tabs); - } - - // make sure that the selected tab won't be closed in order to - // prevent unnecessary flickering - if (overwriteTabs && tabbrowser.selectedTab._tPos >= newTabCount) - tabbrowser.moveTabTo(tabbrowser.selectedTab, newTabCount - 1); - - let numVisibleTabs = 0; - - for (var t = 0; t < newTabCount; t++) { - // When trying to restore into existing tab, we also take the userContextId - // into account if present. - let userContextId = winData.tabs[t].userContextId; - let reuseExisting = t < openTabCount && - (tabbrowser.tabs[t].getAttribute("usercontextid") == (userContextId || "")); - // If the tab is pinned, then we'll be loading it right away, and - // there's no need to cause a remoteness flip by loading it initially - // non-remote. - let forceNotRemote = !winData.tabs[t].pinned; - let tab = reuseExisting ? tabbrowser.tabs[t] : - tabbrowser.addTab("about:blank", - {skipAnimation: true, - forceNotRemote, - userContextId}); - - // If we inserted a new tab because the userContextId didn't match with the - // open tab, even though `t < openTabCount`, we need to remove that open tab - // and put the newly added tab in its place. - if (!reuseExisting && t < openTabCount) { - tabbrowser.removeTab(tabbrowser.tabs[t]); - tabbrowser.moveTabTo(tab, t); - } - - tabs.push(tab); - - if (winData.tabs[t].pinned) - tabbrowser.pinTab(tabs[t]); - - if (winData.tabs[t].hidden) { - tabbrowser.hideTab(tabs[t]); - } - else { - tabbrowser.showTab(tabs[t]); - numVisibleTabs++; - } - - if (!!winData.tabs[t].muted != tabs[t].linkedBrowser.audioMuted) { - tabs[t].toggleMuteAudio(winData.tabs[t].muteReason); - } - } - - if (!overwriteTabs && firstWindow) { - // Move the originally open tabs to the end - let endPosition = tabbrowser.tabs.length - 1; - for (let i = 0; i < initialTabs.length; i++) { - tabbrowser.moveTabTo(initialTabs[i], endPosition); - } - } - - // if all tabs to be restored are hidden, make the first one visible - if (!numVisibleTabs && winData.tabs.length) { - winData.tabs[0].hidden = false; - tabbrowser.showTab(tabs[0]); - } - - // If overwriting tabs, we want to reset each tab's "restoring" state. Since - // we're overwriting those tabs, they should no longer be restoring. The - // tabs will be rebuilt and marked if they need to be restored after loading - // state (in restoreTabs). - if (overwriteTabs) { - for (let i = 0; i < tabbrowser.tabs.length; i++) { - let tab = tabbrowser.tabs[i]; - if (tabbrowser.browsers[i].__SS_restoreState) - this._resetTabRestoringState(tab); - } - } - - // We want to correlate the window with data from the last session, so - // assign another id if we have one. Otherwise clear so we don't do - // anything with it. - delete aWindow.__SS_lastSessionWindowID; - if (winData.__lastSessionWindowID) - aWindow.__SS_lastSessionWindowID = winData.__lastSessionWindowID; - - // when overwriting tabs, remove all superflous ones - if (overwriteTabs && newTabCount < openTabCount) { - Array.slice(tabbrowser.tabs, newTabCount, openTabCount) - .forEach(tabbrowser.removeTab, tabbrowser); - } - - if (overwriteTabs) { - this.restoreWindowFeatures(aWindow, winData); - delete this._windows[aWindow.__SSi].extData; - } - if (winData.cookies) { - SessionCookies.restore(winData.cookies); - } - if (winData.extData) { - if (!this._windows[aWindow.__SSi].extData) { - this._windows[aWindow.__SSi].extData = {}; - } - for (var key in winData.extData) { - this._windows[aWindow.__SSi].extData[key] = winData.extData[key]; - } - } - - let newClosedTabsData = winData._closedTabs || []; - - if (overwriteTabs || firstWindow) { - // Overwrite existing closed tabs data when overwriteTabs=true - // or we're the first window to be restored. - this._windows[aWindow.__SSi]._closedTabs = newClosedTabsData; - } else if (this._max_tabs_undo > 0) { - // If we merge tabs, we also want to merge closed tabs data. We'll assume - // the restored tabs were closed more recently and append the current list - // of closed tabs to the new one... - newClosedTabsData = - newClosedTabsData.concat(this._windows[aWindow.__SSi]._closedTabs); - - // ... and make sure that we don't exceed the max number of closed tabs - // we can restore. - this._windows[aWindow.__SSi]._closedTabs = - newClosedTabsData.slice(0, this._max_tabs_undo); - } - - // Restore tabs, if any. - if (winData.tabs.length) { - this.restoreTabs(aWindow, tabs, winData.tabs, - (overwriteTabs ? (parseInt(winData.selected || "1")) : 0)); - } - - // set smoothScroll back to the original value - tabstrip.smoothScroll = smoothScroll; - - TelemetryStopwatch.finish("FX_SESSION_RESTORE_RESTORE_WINDOW_MS"); - - this._setWindowStateReady(aWindow); - - this._sendWindowRestoredNotification(aWindow); - - Services.obs.notifyObservers(aWindow, NOTIFY_SINGLE_WINDOW_RESTORED, ""); - - this._sendRestoreCompletedNotifications(); - }, - - /** - * Restore multiple windows using the provided state. - * @param aWindow - * Window reference to the first window to use for restoration. - * Additionally required windows will be opened. - * @param aState - * JS object or JSON string - * @param aOptions - * {overwriteTabs: true} to overwrite existing tabs w/ new ones - * {isFollowUp: true} if this is not the restoration of the 1st window - * {firstWindow: true} if this is the first non-private window we're - * restoring in this session, that might open an - * external link as well - */ - restoreWindows: function ssi_restoreWindows(aWindow, aState, aOptions = {}) { - let isFollowUp = aOptions && aOptions.isFollowUp; - - if (isFollowUp) { - this.windowToFocus = aWindow; - } - - // initialize window if necessary - if (aWindow && (!aWindow.__SSi || !this._windows[aWindow.__SSi])) - this.onLoad(aWindow); - - let root; - try { - root = (typeof aState == "string") ? JSON.parse(aState) : aState; - } - catch (ex) { // invalid state object - don't restore anything - debug(ex); - this._sendRestoreCompletedNotifications(); - return; - } - - // Restore closed windows if any. - if (root._closedWindows) { - this._closedWindows = root._closedWindows; - } - - // We're done here if there are no windows. - if (!root.windows || !root.windows.length) { - this._sendRestoreCompletedNotifications(); - return; - } - - if (!root.selectedWindow || root.selectedWindow > root.windows.length) { - root.selectedWindow = 0; - } - - // open new windows for all further window entries of a multi-window session - // (unless they don't contain any tab data) - let winData; - for (var w = 1; w < root.windows.length; w++) { - winData = root.windows[w]; - if (winData && winData.tabs && winData.tabs[0]) { - var window = this._openWindowWithState({ windows: [winData] }); - if (w == root.selectedWindow - 1) { - this.windowToFocus = window; - } - } - } - - this.restoreWindow(aWindow, root.windows[0], aOptions); - - // Scratchpad - if (aState.scratchpads) { - ScratchpadManager.restoreSession(aState.scratchpads); - } - - // The Browser Console - if (aState.browserConsole) { - HUDService.restoreBrowserConsoleSession(); - } - }, - - /** - * Manage history restoration for a window - * @param aWindow - * Window to restore the tabs into - * @param aTabs - * Array of tab references - * @param aTabData - * Array of tab data - * @param aSelectTab - * Index of the tab to select. This is a 1-based index where "1" - * indicates the first tab should be selected, and "0" indicates that - * the currently selected tab will not be changed. - */ - restoreTabs(aWindow, aTabs, aTabData, aSelectTab) { - var tabbrowser = aWindow.gBrowser; - - if (!this._isWindowLoaded(aWindow)) { - // from now on, the data will come from the actual window - delete this._statesToRestore[aWindow.__SS_restoreID]; - delete aWindow.__SS_restoreID; - delete this._windows[aWindow.__SSi]._restoring; - } - - let numTabsToRestore = aTabs.length; - let numTabsInWindow = tabbrowser.tabs.length; - let tabsDataArray = this._windows[aWindow.__SSi].tabs; - - // Update the window state in case we shut down without being notified. - // Individual tab states will be taken care of by restoreTab() below. - if (numTabsInWindow == numTabsToRestore) { - // Remove all previous tab data. - tabsDataArray.length = 0; - } else { - // Remove all previous tab data except tabs that should not be overriden. - tabsDataArray.splice(numTabsInWindow - numTabsToRestore); - } - - // Let the tab data array have the right number of slots. - tabsDataArray.length = numTabsInWindow; - - // If provided, set the selected tab. - if (aSelectTab > 0 && aSelectTab <= aTabs.length) { - tabbrowser.selectedTab = aTabs[aSelectTab - 1]; - - // Update the window state in case we shut down without being notified. - this._windows[aWindow.__SSi].selected = aSelectTab; - } - - // Restore all tabs. - for (let t = 0; t < aTabs.length; t++) { - this.restoreTab(aTabs[t], aTabData[t]); - } - }, - - // Restores the given tab state for a given tab. - restoreTab(tab, tabData, options = {}) { - NS_ASSERT(!tab.linkedBrowser.__SS_restoreState, - "must reset tab before calling restoreTab()"); - - let restoreImmediately = options.restoreImmediately; - let loadArguments = options.loadArguments; - let browser = tab.linkedBrowser; - let window = tab.ownerGlobal; - let tabbrowser = window.gBrowser; - let forceOnDemand = options.forceOnDemand; - let reloadInFreshProcess = options.reloadInFreshProcess; - - let willRestoreImmediately = restoreImmediately || - tabbrowser.selectedBrowser == browser || - loadArguments; - - if (!willRestoreImmediately && !forceOnDemand) { - TabRestoreQueue.add(tab); - } - - this._maybeUpdateBrowserRemoteness({ tabbrowser, tab, - willRestoreImmediately }); - - // Increase the busy state counter before modifying the tab. - this._setWindowStateBusy(window); - - // It's important to set the window state to dirty so that - // we collect their data for the first time when saving state. - DirtyWindows.add(window); - - // In case we didn't collect/receive data for any tabs yet we'll have to - // fill the array with at least empty tabData objects until |_tPos| or - // we'll end up with |null| entries. - for (let otherTab of Array.slice(tabbrowser.tabs, 0, tab._tPos)) { - let emptyState = {entries: [], lastAccessed: otherTab.lastAccessed}; - this._windows[window.__SSi].tabs.push(emptyState); - } - - // Update the tab state in case we shut down without being notified. - this._windows[window.__SSi].tabs[tab._tPos] = tabData; - - // Prepare the tab so that it can be properly restored. We'll pin/unpin - // and show/hide tabs as necessary. We'll also attach a copy of the tab's - // data in case we close it before it's been restored. - if (tabData.pinned) { - tabbrowser.pinTab(tab); - } else { - tabbrowser.unpinTab(tab); - } - - if (tabData.hidden) { - tabbrowser.hideTab(tab); - } else { - tabbrowser.showTab(tab); - } - - if (!!tabData.muted != browser.audioMuted) { - tab.toggleMuteAudio(tabData.muteReason); - } - - if (tabData.lastAccessed) { - tab.updateLastAccessed(tabData.lastAccessed); - } - - if ("attributes" in tabData) { - // Ensure that we persist tab attributes restored from previous sessions. - Object.keys(tabData.attributes).forEach(a => TabAttributes.persist(a)); - } - - if (!tabData.entries) { - tabData.entries = []; - } - if (tabData.extData) { - tab.__SS_extdata = Cu.cloneInto(tabData.extData, {}); - } else { - delete tab.__SS_extdata; - } - - // Tab is now open. - delete tabData.closedAt; - - // Ensure the index is in bounds. - let activeIndex = (tabData.index || tabData.entries.length) - 1; - activeIndex = Math.min(activeIndex, tabData.entries.length - 1); - activeIndex = Math.max(activeIndex, 0); - - // Save the index in case we updated it above. - tabData.index = activeIndex + 1; - - // Start a new epoch to discard all frame script messages relating to a - // previous epoch. All async messages that are still on their way to chrome - // will be ignored and don't override any tab data set when restoring. - let epoch = this.startNextEpoch(browser); - - // keep the data around to prevent dataloss in case - // a tab gets closed before it's been properly restored - browser.__SS_restoreState = TAB_STATE_NEEDS_RESTORE; - browser.setAttribute("pending", "true"); - tab.setAttribute("pending", "true"); - - // If we're restoring this tab, it certainly shouldn't be in - // the ignored set anymore. - this._crashedBrowsers.delete(browser.permanentKey); - - // Update the persistent tab state cache with |tabData| information. - TabStateCache.update(browser, { - history: {entries: tabData.entries, index: tabData.index}, - scroll: tabData.scroll || null, - storage: tabData.storage || null, - formdata: tabData.formdata || null, - disallow: tabData.disallow || null, - pageStyle: tabData.pageStyle || null, - - // This information is only needed until the tab has finished restoring. - // When that's done it will be removed from the cache and we always - // collect it in TabState._collectBaseTabData(). - image: tabData.image || "", - iconLoadingPrincipal: tabData.iconLoadingPrincipal || null, - userTypedValue: tabData.userTypedValue || "", - userTypedClear: tabData.userTypedClear || 0 - }); - - browser.messageManager.sendAsyncMessage("SessionStore:restoreHistory", - {tabData: tabData, epoch: epoch, loadArguments}); - - // Restore tab attributes. - if ("attributes" in tabData) { - TabAttributes.set(tab, tabData.attributes); - } - - // This could cause us to ignore MAX_CONCURRENT_TAB_RESTORES a bit, but - // it ensures each window will have its selected tab loaded. - if (willRestoreImmediately) { - this.restoreTabContent(tab, loadArguments, reloadInFreshProcess); - } else if (!forceOnDemand) { - this.restoreNextTab(); - } - - // Decrease the busy state counter after we're done. - this._setWindowStateReady(window); - }, - - /** - * Kicks off restoring the given tab. - * - * @param aTab - * the tab to restore - * @param aLoadArguments - * optional load arguments used for loadURI() - * @param aReloadInFreshProcess - * true if we want to reload into a fresh process - */ - restoreTabContent: function (aTab, aLoadArguments = null, aReloadInFreshProcess = false) { - if (aTab.hasAttribute("customizemode") && !aLoadArguments) { - return; - } - - let browser = aTab.linkedBrowser; - let window = aTab.ownerGlobal; - let tabbrowser = window.gBrowser; - let tabData = TabState.clone(aTab); - let activeIndex = tabData.index - 1; - let activePageData = tabData.entries[activeIndex] || null; - let uri = activePageData ? activePageData.url || null : null; - if (aLoadArguments) { - uri = aLoadArguments.uri; - if (aLoadArguments.userContextId) { - browser.setAttribute("usercontextid", aLoadArguments.userContextId); - } - } - - // We have to mark this tab as restoring first, otherwise - // the "pending" attribute will be applied to the linked - // browser, which removes it from the display list. We cannot - // flip the remoteness of any browser that is not being displayed. - this.markTabAsRestoring(aTab); - - let isRemotenessUpdate = false; - if (aReloadInFreshProcess) { - isRemotenessUpdate = tabbrowser.switchBrowserIntoFreshProcess(browser); - } else { - isRemotenessUpdate = tabbrowser.updateBrowserRemotenessByURL(browser, uri); - } - - if (isRemotenessUpdate) { - // We updated the remoteness, so we need to send the history down again. - // - // Start a new epoch to discard all frame script messages relating to a - // previous epoch. All async messages that are still on their way to chrome - // will be ignored and don't override any tab data set when restoring. - let epoch = this.startNextEpoch(browser); - - browser.messageManager.sendAsyncMessage("SessionStore:restoreHistory", { - tabData: tabData, - epoch: epoch, - loadArguments: aLoadArguments, - isRemotenessUpdate, - }); - - } - - // If the restored browser wants to show view source content, start up a - // view source browser that will load the required frame script. - if (uri && ViewSourceBrowser.isViewSource(uri)) { - new ViewSourceBrowser(browser); - } - - browser.messageManager.sendAsyncMessage("SessionStore:restoreTabContent", - {loadArguments: aLoadArguments, isRemotenessUpdate}); - }, - - /** - * Marks a given pending tab as restoring. - * - * @param aTab - * the pending tab to mark as restoring - */ - markTabAsRestoring(aTab) { - let browser = aTab.linkedBrowser; - if (browser.__SS_restoreState != TAB_STATE_NEEDS_RESTORE) { - throw new Error("Given tab is not pending."); - } - - // Make sure that this tab is removed from the priority queue. - TabRestoreQueue.remove(aTab); - - // Increase our internal count. - this._tabsRestoringCount++; - - // Set this tab's state to restoring - browser.__SS_restoreState = TAB_STATE_RESTORING; - browser.removeAttribute("pending"); - aTab.removeAttribute("pending"); - }, - - /** - * This _attempts_ to restore the next available tab. If the restore fails, - * then we will attempt the next one. - * There are conditions where this won't do anything: - * if we're in the process of quitting - * if there are no tabs to restore - * if we have already reached the limit for number of tabs to restore - */ - restoreNextTab: function ssi_restoreNextTab() { - // If we call in here while quitting, we don't actually want to do anything - if (RunState.isQuitting) - return; - - // Don't exceed the maximum number of concurrent tab restores. - if (this._tabsRestoringCount >= MAX_CONCURRENT_TAB_RESTORES) - return; - - let tab = TabRestoreQueue.shift(); - if (tab) { - this.restoreTabContent(tab); - } - }, - - /** - * Restore visibility and dimension features to a window - * @param aWindow - * Window reference - * @param aWinData - * Object containing session data for the window - */ - restoreWindowFeatures: function ssi_restoreWindowFeatures(aWindow, aWinData) { - var hidden = (aWinData.hidden)?aWinData.hidden.split(","):[]; - WINDOW_HIDEABLE_FEATURES.forEach(function(aItem) { - aWindow[aItem].visible = hidden.indexOf(aItem) == -1; - }); - - if (aWinData.isPopup) { - this._windows[aWindow.__SSi].isPopup = true; - if (aWindow.gURLBar) { - aWindow.gURLBar.readOnly = true; - aWindow.gURLBar.setAttribute("enablehistory", "false"); - } - } - else { - delete this._windows[aWindow.__SSi].isPopup; - if (aWindow.gURLBar) { - aWindow.gURLBar.readOnly = false; - aWindow.gURLBar.setAttribute("enablehistory", "true"); - } - } - - var _this = this; - aWindow.setTimeout(function() { - _this.restoreDimensions.apply(_this, [aWindow, - +(aWinData.width || 0), - +(aWinData.height || 0), - "screenX" in aWinData ? +aWinData.screenX : NaN, - "screenY" in aWinData ? +aWinData.screenY : NaN, - aWinData.sizemode || "", aWinData.sidebar || ""]); - }, 0); - }, - - /** - * Restore a window's dimensions - * @param aWidth - * Window width - * @param aHeight - * Window height - * @param aLeft - * Window left - * @param aTop - * Window top - * @param aSizeMode - * Window size mode (eg: maximized) - * @param aSidebar - * Sidebar command - */ - restoreDimensions: function ssi_restoreDimensions(aWindow, aWidth, aHeight, aLeft, aTop, aSizeMode, aSidebar) { - var win = aWindow; - var _this = this; - function win_(aName) { return _this._getWindowDimension(win, aName); } - - // find available space on the screen where this window is being placed - let screen = gScreenManager.screenForRect(aLeft, aTop, aWidth, aHeight); - if (screen) { - let screenLeft = {}, screenTop = {}, screenWidth = {}, screenHeight = {}; - screen.GetAvailRectDisplayPix(screenLeft, screenTop, screenWidth, screenHeight); - // screenX/Y are based on the origin of the screen's desktop-pixel coordinate space - let screenLeftCss = screenLeft.value; - let screenTopCss = screenTop.value; - // convert screen's device pixel dimensions to CSS px dimensions - screen.GetAvailRect(screenLeft, screenTop, screenWidth, screenHeight); - let cssToDevScale = screen.defaultCSSScaleFactor; - let screenRightCss = screenLeftCss + screenWidth.value / cssToDevScale; - let screenBottomCss = screenTopCss + screenHeight.value / cssToDevScale; - - // Pull the window within the screen's bounds (allowing a little slop - // for windows that may be deliberately placed with their border off-screen - // as when Win10 "snaps" a window to the left/right edge -- bug 1276516). - // First, ensure the left edge is large enough... - if (aLeft < screenLeftCss - SCREEN_EDGE_SLOP) { - aLeft = screenLeftCss; - } - // Then check the resulting right edge, and reduce it if necessary. - let right = aLeft + aWidth; - if (right > screenRightCss + SCREEN_EDGE_SLOP) { - right = screenRightCss; - // See if we can move the left edge leftwards to maintain width. - if (aLeft > screenLeftCss) { - aLeft = Math.max(right - aWidth, screenLeftCss); - } - } - // Finally, update aWidth to account for the adjusted left and right edges. - aWidth = right - aLeft; - - // And do the same in the vertical dimension. - if (aTop < screenTopCss - SCREEN_EDGE_SLOP) { - aTop = screenTopCss; - } - let bottom = aTop + aHeight; - if (bottom > screenBottomCss + SCREEN_EDGE_SLOP) { - bottom = screenBottomCss; - if (aTop > screenTopCss) { - aTop = Math.max(bottom - aHeight, screenTopCss); - } - } - aHeight = bottom - aTop; - } - - // only modify those aspects which aren't correct yet - if (!isNaN(aLeft) && !isNaN(aTop) && (aLeft != win_("screenX") || aTop != win_("screenY"))) { - aWindow.moveTo(aLeft, aTop); - } - if (aWidth && aHeight && (aWidth != win_("width") || aHeight != win_("height"))) { - // Don't resize the window if it's currently maximized and we would - // maximize it again shortly after. - if (aSizeMode != "maximized" || win_("sizemode") != "maximized") { - aWindow.resizeTo(aWidth, aHeight); - } - } - if (aSizeMode && win_("sizemode") != aSizeMode) - { - switch (aSizeMode) - { - case "maximized": - aWindow.maximize(); - break; - case "minimized": - aWindow.minimize(); - break; - case "normal": - aWindow.restore(); - break; - } - } - var sidebar = aWindow.document.getElementById("sidebar-box"); - if (sidebar.getAttribute("sidebarcommand") != aSidebar) { - aWindow.SidebarUI.show(aSidebar); - } - // since resizing/moving a window brings it to the foreground, - // we might want to re-focus the last focused window - if (this.windowToFocus) { - this.windowToFocus.focus(); - } - }, - - /* ........ Disk Access .............. */ - - /** - * Save the current session state to disk, after a delay. - * - * @param aWindow (optional) - * Will mark the given window as dirty so that we will recollect its - * data before we start writing. - */ - saveStateDelayed: function (aWindow = null) { - if (aWindow) { - DirtyWindows.add(aWindow); - } - - SessionSaver.runDelayed(); - }, - - /* ........ Auxiliary Functions .............. */ - - /** - * Determines whether or not a tab that is being restored needs - * to have its remoteness flipped first. - * - * @param (object) with the following properties: - * - * tabbrowser (<xul:tabbrowser>): - * The tabbrowser that the browser belongs to. - * - * tab (<xul:tab>): - * The tab being restored - * - * willRestoreImmediately (bool): - * true if the tab is going to have its content - * restored immediately by the caller. - * - */ - _maybeUpdateBrowserRemoteness({ tabbrowser, tab, - willRestoreImmediately }) { - // If the browser we're attempting to restore happens to be - // remote, we need to flip it back to non-remote if it's going - // to go into the pending background tab state. This is to make - // sure that a background tab can't crash if it hasn't yet - // been restored. - // - // Normally, when a window is restored, the tabs that SessionStore - // inserts are non-remote - but the initial browser is, by default, - // remote, so this check and flip covers this case. The other case - // is when window state is overwriting the state of an existing - // window with some remote tabs. - let browser = tab.linkedBrowser; - - // There are two ways that a tab might start restoring its content - // very soon - either the caller is going to restore the content - // immediately, or the TabRestoreQueue is set up so that the tab - // content is going to be restored in the very near future. In - // either case, we don't want to flip remoteness, since the browser - // will soon be loading content. - let willRestore = willRestoreImmediately || - TabRestoreQueue.willRestoreSoon(tab); - - if (browser.isRemoteBrowser && !willRestore) { - tabbrowser.updateBrowserRemoteness(browser, false); - } - }, - - /** - * Update the session start time and send a telemetry measurement - * for the number of days elapsed since the session was started. - * - * @param state - * The session state. - */ - _updateSessionStartTime: function ssi_updateSessionStartTime(state) { - // Attempt to load the session start time from the session state - if (state.session && state.session.startTime) { - this._sessionStartTime = state.session.startTime; - } - }, - - /** - * call a callback for all currently opened browser windows - * (might miss the most recent one) - * @param aFunc - * Callback each window is passed to - */ - _forEachBrowserWindow: function ssi_forEachBrowserWindow(aFunc) { - var windowsEnum = Services.wm.getEnumerator("navigator:browser"); - - while (windowsEnum.hasMoreElements()) { - var window = windowsEnum.getNext(); - if (window.__SSi && !window.closed) { - aFunc.call(this, window); - } - } - }, - - /** - * Returns most recent window - * @returns Window reference - */ - _getMostRecentBrowserWindow: function ssi_getMostRecentBrowserWindow() { - return RecentWindow.getMostRecentBrowserWindow({ allowPopups: true }); - }, - - /** - * Calls onClose for windows that are determined to be closed but aren't - * destroyed yet, which would otherwise cause getBrowserState and - * setBrowserState to treat them as open windows. - */ - _handleClosedWindows: function ssi_handleClosedWindows() { - var windowsEnum = Services.wm.getEnumerator("navigator:browser"); - - while (windowsEnum.hasMoreElements()) { - var window = windowsEnum.getNext(); - if (window.closed) { - this.onClose(window); - } - } - }, - - /** - * open a new browser window for a given session state - * called when restoring a multi-window session - * @param aState - * Object containing session data - */ - _openWindowWithState: function ssi_openWindowWithState(aState) { - var argString = Cc["@mozilla.org/supports-string;1"]. - createInstance(Ci.nsISupportsString); - argString.data = ""; - - // Build feature string - let features = "chrome,dialog=no,macsuppressanimation,all"; - let winState = aState.windows[0]; - WINDOW_ATTRIBUTES.forEach(function(aFeature) { - // Use !isNaN as an easy way to ignore sizemode and check for numbers - if (aFeature in winState && !isNaN(winState[aFeature])) - features += "," + aFeature + "=" + winState[aFeature]; - }); - - if (winState.isPrivate) { - features += ",private"; - } - - var window = - Services.ww.openWindow(null, this._prefBranch.getCharPref("chromeURL"), - "_blank", features, argString); - - do { - var ID = "window" + Math.random(); - } while (ID in this._statesToRestore); - this._statesToRestore[(window.__SS_restoreID = ID)] = aState; - - return window; - }, - - /** - * Whether or not to resume session, if not recovering from a crash. - * @returns bool - */ - _doResumeSession: function ssi_doResumeSession() { - return this._prefBranch.getIntPref("startup.page") == 3 || - this._prefBranch.getBoolPref("sessionstore.resume_session_once"); - }, - - /** - * whether the user wants to load any other page at startup - * (except the homepage) - needed for determining whether to overwrite the current tabs - * C.f.: nsBrowserContentHandler's defaultArgs implementation. - * @returns bool - */ - _isCmdLineEmpty: function ssi_isCmdLineEmpty(aWindow, aState) { - var pinnedOnly = aState.windows && - aState.windows.every(win => - win.tabs.every(tab => tab.pinned)); - - let hasFirstArgument = aWindow.arguments && aWindow.arguments[0]; - if (!pinnedOnly) { - let defaultArgs = Cc["@mozilla.org/browser/clh;1"]. - getService(Ci.nsIBrowserHandler).defaultArgs; - if (aWindow.arguments && - aWindow.arguments[0] && - aWindow.arguments[0] == defaultArgs) - hasFirstArgument = false; - } - - return !hasFirstArgument; - }, - - /** - * on popup windows, the XULWindow's attributes seem not to be set correctly - * we use thus JSDOMWindow attributes for sizemode and normal window attributes - * (and hope for reasonable values when maximized/minimized - since then - * outerWidth/outerHeight aren't the dimensions of the restored window) - * @param aWindow - * Window reference - * @param aAttribute - * String sizemode | width | height | other window attribute - * @returns string - */ - _getWindowDimension: function ssi_getWindowDimension(aWindow, aAttribute) { - if (aAttribute == "sizemode") { - switch (aWindow.windowState) { - case aWindow.STATE_FULLSCREEN: - case aWindow.STATE_MAXIMIZED: - return "maximized"; - case aWindow.STATE_MINIMIZED: - return "minimized"; - default: - return "normal"; - } - } - - var dimension; - switch (aAttribute) { - case "width": - dimension = aWindow.outerWidth; - break; - case "height": - dimension = aWindow.outerHeight; - break; - default: - dimension = aAttribute in aWindow ? aWindow[aAttribute] : ""; - break; - } - - if (aWindow.windowState == aWindow.STATE_NORMAL) { - return dimension; - } - return aWindow.document.documentElement.getAttribute(aAttribute) || dimension; - }, - - /** - * @param aState is a session state - * @param aRecentCrashes is the number of consecutive crashes - * @returns whether a restore page will be needed for the session state - */ - _needsRestorePage: function ssi_needsRestorePage(aState, aRecentCrashes) { - const SIX_HOURS_IN_MS = 6 * 60 * 60 * 1000; - - // don't display the page when there's nothing to restore - let winData = aState.windows || null; - if (!winData || winData.length == 0) - return false; - - // don't wrap a single about:sessionrestore page - if (this._hasSingleTabWithURL(winData, "about:sessionrestore") || - this._hasSingleTabWithURL(winData, "about:welcomeback")) { - return false; - } - - // don't automatically restore in Safe Mode - if (Services.appinfo.inSafeMode) - return true; - - let max_resumed_crashes = - this._prefBranch.getIntPref("sessionstore.max_resumed_crashes"); - let sessionAge = aState.session && aState.session.lastUpdate && - (Date.now() - aState.session.lastUpdate); - - return max_resumed_crashes != -1 && - (aRecentCrashes > max_resumed_crashes || - sessionAge && sessionAge >= SIX_HOURS_IN_MS); - }, - - /** - * @param aWinData is the set of windows in session state - * @param aURL is the single URL we're looking for - * @returns whether the window data contains only the single URL passed - */ - _hasSingleTabWithURL: function(aWinData, aURL) { - if (aWinData && - aWinData.length == 1 && - aWinData[0].tabs && - aWinData[0].tabs.length == 1 && - aWinData[0].tabs[0].entries && - aWinData[0].tabs[0].entries.length == 1) { - return aURL == aWinData[0].tabs[0].entries[0].url; - } - return false; - }, - - /** - * Determine if the tab state we're passed is something we should save. This - * is used when closing a tab or closing a window with a single tab - * - * @param aTabState - * The current tab state - * @returns boolean - */ - _shouldSaveTabState: function ssi_shouldSaveTabState(aTabState) { - // If the tab has only a transient about: history entry, no other - // session history, and no userTypedValue, then we don't actually want to - // store this tab's data. - return aTabState.entries.length && - !(aTabState.entries.length == 1 && - (aTabState.entries[0].url == "about:blank" || - aTabState.entries[0].url == "about:newtab" || - aTabState.entries[0].url == "about:privatebrowsing") && - !aTabState.userTypedValue); - }, - - /** - * This is going to take a state as provided at startup (via - * nsISessionStartup.state) and split it into 2 parts. The first part - * (defaultState) will be a state that should still be restored at startup, - * while the second part (state) is a state that should be saved for later. - * defaultState will be comprised of windows with only pinned tabs, extracted - * from state. It will contain the cookies that go along with the history - * entries in those tabs. It will also contain window position information. - * - * defaultState will be restored at startup. state will be passed into - * LastSession and will be kept in case the user explicitly wants - * to restore the previous session (publicly exposed as restoreLastSession). - * - * @param state - * The state, presumably from nsISessionStartup.state - * @returns [defaultState, state] - */ - _prepDataForDeferredRestore: function ssi_prepDataForDeferredRestore(state) { - // Make sure that we don't modify the global state as provided by - // nsSessionStartup.state. - state = Cu.cloneInto(state, {}); - - let defaultState = { windows: [], selectedWindow: 1 }; - - state.selectedWindow = state.selectedWindow || 1; - - // Look at each window, remove pinned tabs, adjust selectedindex, - // remove window if necessary. - for (let wIndex = 0; wIndex < state.windows.length;) { - let window = state.windows[wIndex]; - window.selected = window.selected || 1; - // We're going to put the state of the window into this object - let pinnedWindowState = { tabs: [], cookies: []}; - for (let tIndex = 0; tIndex < window.tabs.length;) { - if (window.tabs[tIndex].pinned) { - // Adjust window.selected - if (tIndex + 1 < window.selected) - window.selected -= 1; - else if (tIndex + 1 == window.selected) - pinnedWindowState.selected = pinnedWindowState.tabs.length + 2; - // + 2 because the tab isn't actually in the array yet - - // Now add the pinned tab to our window - pinnedWindowState.tabs = - pinnedWindowState.tabs.concat(window.tabs.splice(tIndex, 1)); - // We don't want to increment tIndex here. - continue; - } - tIndex++; - } - - // At this point the window in the state object has been modified (or not) - // We want to build the rest of this new window object if we have pinnedTabs. - if (pinnedWindowState.tabs.length) { - // First get the other attributes off the window - WINDOW_ATTRIBUTES.forEach(function(attr) { - if (attr in window) { - pinnedWindowState[attr] = window[attr]; - delete window[attr]; - } - }); - // We're just copying position data into the pinned window. - // Not copying over: - // - _closedTabs - // - extData - // - isPopup - // - hidden - - // Assign a unique ID to correlate the window to be opened with the - // remaining data - window.__lastSessionWindowID = pinnedWindowState.__lastSessionWindowID - = "" + Date.now() + Math.random(); - - // Extract the cookies that belong with each pinned tab - this._splitCookiesFromWindow(window, pinnedWindowState); - - // Actually add this window to our defaultState - defaultState.windows.push(pinnedWindowState); - // Remove the window from the state if it doesn't have any tabs - if (!window.tabs.length) { - if (wIndex + 1 <= state.selectedWindow) - state.selectedWindow -= 1; - else if (wIndex + 1 == state.selectedWindow) - defaultState.selectedIndex = defaultState.windows.length + 1; - - state.windows.splice(wIndex, 1); - // We don't want to increment wIndex here. - continue; - } - - - } - wIndex++; - } - - return [defaultState, state]; - }, - - /** - * Splits out the cookies from aWinState into aTargetWinState based on the - * tabs that are in aTargetWinState. - * This alters the state of aWinState and aTargetWinState. - */ - _splitCookiesFromWindow: - function ssi_splitCookiesFromWindow(aWinState, aTargetWinState) { - if (!aWinState.cookies || !aWinState.cookies.length) - return; - - // Get the hosts for history entries in aTargetWinState - let cookieHosts = SessionCookies.getHostsForWindow(aTargetWinState); - - // By creating a regex we reduce overhead and there is only one loop pass - // through either array (cookieHosts and aWinState.cookies). - let hosts = Object.keys(cookieHosts).join("|").replace(/\./g, "\\."); - // If we don't actually have any hosts, then we don't want to do anything. - if (!hosts.length) - return; - let cookieRegex = new RegExp(".*(" + hosts + ")"); - for (let cIndex = 0; cIndex < aWinState.cookies.length;) { - if (cookieRegex.test(aWinState.cookies[cIndex].host)) { - aTargetWinState.cookies = - aTargetWinState.cookies.concat(aWinState.cookies.splice(cIndex, 1)); - continue; - } - cIndex++; - } - }, - - _sendRestoreCompletedNotifications: function ssi_sendRestoreCompletedNotifications() { - // not all windows restored, yet - if (this._restoreCount > 1) { - this._restoreCount--; - return; - } - - // observers were already notified - if (this._restoreCount == -1) - return; - - // This was the last window restored at startup, notify observers. - Services.obs.notifyObservers(null, - this._browserSetState ? NOTIFY_BROWSER_STATE_RESTORED : NOTIFY_WINDOWS_RESTORED, - ""); - - this._browserSetState = false; - this._restoreCount = -1; - }, - - /** - * Set the given window's busy state - * @param aWindow the window - * @param aValue the window's busy state - */ - _setWindowStateBusyValue: - function ssi_changeWindowStateBusyValue(aWindow, aValue) { - - this._windows[aWindow.__SSi].busy = aValue; - - // Keep the to-be-restored state in sync because that is returned by - // getWindowState() as long as the window isn't loaded, yet. - if (!this._isWindowLoaded(aWindow)) { - let stateToRestore = this._statesToRestore[aWindow.__SS_restoreID].windows[0]; - stateToRestore.busy = aValue; - } - }, - - /** - * Set the given window's state to 'not busy'. - * @param aWindow the window - */ - _setWindowStateReady: function ssi_setWindowStateReady(aWindow) { - let newCount = (this._windowBusyStates.get(aWindow) || 0) - 1; - if (newCount < 0) { - throw new Error("Invalid window busy state (less than zero)."); - } - this._windowBusyStates.set(aWindow, newCount); - - if (newCount == 0) { - this._setWindowStateBusyValue(aWindow, false); - this._sendWindowStateEvent(aWindow, "Ready"); - } - }, - - /** - * Set the given window's state to 'busy'. - * @param aWindow the window - */ - _setWindowStateBusy: function ssi_setWindowStateBusy(aWindow) { - let newCount = (this._windowBusyStates.get(aWindow) || 0) + 1; - this._windowBusyStates.set(aWindow, newCount); - - if (newCount == 1) { - this._setWindowStateBusyValue(aWindow, true); - this._sendWindowStateEvent(aWindow, "Busy"); - } - }, - - /** - * Dispatch an SSWindowState_____ event for the given window. - * @param aWindow the window - * @param aType the type of event, SSWindowState will be prepended to this string - */ - _sendWindowStateEvent: function ssi_sendWindowStateEvent(aWindow, aType) { - let event = aWindow.document.createEvent("Events"); - event.initEvent("SSWindowState" + aType, true, false); - aWindow.dispatchEvent(event); - }, - - /** - * Dispatch the SSWindowRestored event for the given window. - * @param aWindow - * The window which has been restored - */ - _sendWindowRestoredNotification(aWindow) { - let event = aWindow.document.createEvent("Events"); - event.initEvent("SSWindowRestored", true, false); - aWindow.dispatchEvent(event); - }, - - /** - * Dispatch the SSTabRestored event for the given tab. - * @param aTab - * The tab which has been restored - * @param aIsRemotenessUpdate - * True if this tab was restored due to flip from running from - * out-of-main-process to in-main-process or vice-versa. - */ - _sendTabRestoredNotification(aTab, aIsRemotenessUpdate) { - let event = aTab.ownerDocument.createEvent("CustomEvent"); - event.initCustomEvent("SSTabRestored", true, false, { - isRemotenessUpdate: aIsRemotenessUpdate, - }); - aTab.dispatchEvent(event); - }, - - /** - * @param aWindow - * Window reference - * @returns whether this window's data is still cached in _statesToRestore - * because it's not fully loaded yet - */ - _isWindowLoaded: function ssi_isWindowLoaded(aWindow) { - return !aWindow.__SS_restoreID; - }, - - /** - * Replace "Loading..." with the tab label (with minimal side-effects) - * @param aString is the string the title is stored in - * @param aTabbrowser is a tabbrowser object, containing aTab - * @param aTab is the tab whose title we're updating & using - * - * @returns aString that has been updated with the new title - */ - _replaceLoadingTitle : function ssi_replaceLoadingTitle(aString, aTabbrowser, aTab) { - if (aString == aTabbrowser.mStringBundle.getString("tabs.connecting")) { - aTabbrowser.setTabTitle(aTab); - [aString, aTab.label] = [aTab.label, aString]; - } - return aString; - }, - - /** - * Resize this._closedWindows to the value of the pref, except in the case - * where we don't have any non-popup windows on Windows and Linux. Then we must - * resize such that we have at least one non-popup window. - */ - _capClosedWindows : function ssi_capClosedWindows() { - if (this._closedWindows.length <= this._max_windows_undo) - return; - let spliceTo = this._max_windows_undo; - if (AppConstants.platform != "macosx") { - let normalWindowIndex = 0; - // try to find a non-popup window in this._closedWindows - while (normalWindowIndex < this._closedWindows.length && - !!this._closedWindows[normalWindowIndex].isPopup) - normalWindowIndex++; - if (normalWindowIndex >= this._max_windows_undo) - spliceTo = normalWindowIndex + 1; - } - this._closedWindows.splice(spliceTo, this._closedWindows.length); - }, - - /** - * Clears the set of windows that are "resurrected" before writing to disk to - * make closing windows one after the other until shutdown work as expected. - * - * This function should only be called when we are sure that there has been - * a user action that indicates the browser is actively being used and all - * windows that have been closed before are not part of a series of closing - * windows. - */ - _clearRestoringWindows: function ssi_clearRestoringWindows() { - for (let i = 0; i < this._closedWindows.length; i++) { - delete this._closedWindows[i]._shouldRestore; - } - }, - - /** - * Reset state to prepare for a new session state to be restored. - */ - _resetRestoringState: function ssi_initRestoringState() { - TabRestoreQueue.reset(); - this._tabsRestoringCount = 0; - }, - - /** - * Reset the restoring state for a particular tab. This will be called when - * removing a tab or when a tab needs to be reset (it's being overwritten). - * - * @param aTab - * The tab that will be "reset" - */ - _resetLocalTabRestoringState: function (aTab) { - NS_ASSERT(aTab.linkedBrowser.__SS_restoreState, - "given tab is not restoring"); - - let browser = aTab.linkedBrowser; - - // Keep the tab's previous state for later in this method - let previousState = browser.__SS_restoreState; - - // The browser is no longer in any sort of restoring state. - delete browser.__SS_restoreState; - - aTab.removeAttribute("pending"); - browser.removeAttribute("pending"); - - if (previousState == TAB_STATE_RESTORING) { - if (this._tabsRestoringCount) - this._tabsRestoringCount--; - } else if (previousState == TAB_STATE_NEEDS_RESTORE) { - // Make sure that the tab is removed from the list of tabs to restore. - // Again, this is normally done in restoreTabContent, but that isn't being called - // for this tab. - TabRestoreQueue.remove(aTab); - } - }, - - _resetTabRestoringState: function (tab) { - NS_ASSERT(tab.linkedBrowser.__SS_restoreState, - "given tab is not restoring"); - - let browser = tab.linkedBrowser; - browser.messageManager.sendAsyncMessage("SessionStore:resetRestore", {}); - this._resetLocalTabRestoringState(tab); - }, - - /** - * Each fresh tab starts out with epoch=0. This function can be used to - * start a next epoch by incrementing the current value. It will enables us - * to ignore stale messages sent from previous epochs. The function returns - * the new epoch ID for the given |browser|. - */ - startNextEpoch(browser) { - let next = this.getCurrentEpoch(browser) + 1; - this._browserEpochs.set(browser.permanentKey, next); - return next; - }, - - /** - * Returns the current epoch for the given <browser>. If we haven't assigned - * a new epoch this will default to zero for new tabs. - */ - getCurrentEpoch(browser) { - return this._browserEpochs.get(browser.permanentKey) || 0; - }, - - /** - * Each time a <browser> element is restored, we increment its "epoch". To - * check if a message from content-sessionStore.js is out of date, we can - * compare the epoch received with the message to the <browser> element's - * epoch. This function does that, and returns true if |epoch| is up-to-date - * with respect to |browser|. - */ - isCurrentEpoch: function (browser, epoch) { - return this.getCurrentEpoch(browser) == epoch; - }, - - /** - * Resets the epoch for a given <browser>. We need to this every time we - * receive a hint that a new docShell has been loaded into the browser as - * the frame script starts out with epoch=0. - */ - resetEpoch(browser) { - this._browserEpochs.delete(browser.permanentKey); - }, - - /** - * Handle an error report from a content process. - */ - reportInternalError(data) { - // For the moment, we only report errors through Telemetry. - if (data.telemetry) { - for (let key of Object.keys(data.telemetry)) { - let histogram = Telemetry.getHistogramById(key); - histogram.add(data.telemetry[key]); - } - } - }, - - /** - * Countdown for a given duration, skipping beats if the computer is too busy, - * sleeping or otherwise unavailable. - * - * @param {number} delay An approximate delay to wait in milliseconds (rounded - * up to the closest second). - * - * @return Promise - */ - looseTimer(delay) { - let DELAY_BEAT = 1000; - let timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer); - let beats = Math.ceil(delay / DELAY_BEAT); - let promise = new Promise(resolve => { - timer.initWithCallback(function() { - if (beats <= 0) { - resolve(); - } - --beats; - }, DELAY_BEAT, Ci.nsITimer.TYPE_REPEATING_PRECISE_CAN_SKIP); - }); - // Ensure that the timer is both canceled once we are done with it - // and not garbage-collected until then. - promise.then(() => timer.cancel(), () => timer.cancel()); - return promise; - } -}; - -/** - * Priority queue that keeps track of a list of tabs to restore and returns - * the tab we should restore next, based on priority rules. We decide between - * pinned, visible and hidden tabs in that and FIFO order. Hidden tabs are only - * restored with restore_hidden_tabs=true. - */ -var TabRestoreQueue = { - // The separate buckets used to store tabs. - tabs: {priority: [], visible: [], hidden: []}, - - // Preferences used by the TabRestoreQueue to determine which tabs - // are restored automatically and which tabs will be on-demand. - prefs: { - // Lazy getter that returns whether tabs are restored on demand. - get restoreOnDemand() { - let updateValue = () => { - let value = Services.prefs.getBoolPref(PREF); - let definition = {value: value, configurable: true}; - Object.defineProperty(this, "restoreOnDemand", definition); - return value; - } - - const PREF = "browser.sessionstore.restore_on_demand"; - Services.prefs.addObserver(PREF, updateValue, false); - return updateValue(); - }, - - // Lazy getter that returns whether pinned tabs are restored on demand. - get restorePinnedTabsOnDemand() { - let updateValue = () => { - let value = Services.prefs.getBoolPref(PREF); - let definition = {value: value, configurable: true}; - Object.defineProperty(this, "restorePinnedTabsOnDemand", definition); - return value; - } - - const PREF = "browser.sessionstore.restore_pinned_tabs_on_demand"; - Services.prefs.addObserver(PREF, updateValue, false); - return updateValue(); - }, - - // Lazy getter that returns whether we should restore hidden tabs. - get restoreHiddenTabs() { - let updateValue = () => { - let value = Services.prefs.getBoolPref(PREF); - let definition = {value: value, configurable: true}; - Object.defineProperty(this, "restoreHiddenTabs", definition); - return value; - } - - const PREF = "browser.sessionstore.restore_hidden_tabs"; - Services.prefs.addObserver(PREF, updateValue, false); - return updateValue(); - } - }, - - // Resets the queue and removes all tabs. - reset: function () { - this.tabs = {priority: [], visible: [], hidden: []}; - }, - - // Adds a tab to the queue and determines its priority bucket. - add: function (tab) { - let {priority, hidden, visible} = this.tabs; - - if (tab.pinned) { - priority.push(tab); - } else if (tab.hidden) { - hidden.push(tab); - } else { - visible.push(tab); - } - }, - - // Removes a given tab from the queue, if it's in there. - remove: function (tab) { - let {priority, hidden, visible} = this.tabs; - - // We'll always check priority first since we don't - // have an indicator if a tab will be there or not. - let set = priority; - let index = set.indexOf(tab); - - if (index == -1) { - set = tab.hidden ? hidden : visible; - index = set.indexOf(tab); - } - - if (index > -1) { - set.splice(index, 1); - } - }, - - // Returns and removes the tab with the highest priority. - shift: function () { - let set; - let {priority, hidden, visible} = this.tabs; - - let {restoreOnDemand, restorePinnedTabsOnDemand} = this.prefs; - let restorePinned = !(restoreOnDemand && restorePinnedTabsOnDemand); - if (restorePinned && priority.length) { - set = priority; - } else if (!restoreOnDemand) { - if (visible.length) { - set = visible; - } else if (this.prefs.restoreHiddenTabs && hidden.length) { - set = hidden; - } - } - - return set && set.shift(); - }, - - // Moves a given tab from the 'hidden' to the 'visible' bucket. - hiddenToVisible: function (tab) { - let {hidden, visible} = this.tabs; - let index = hidden.indexOf(tab); - - if (index > -1) { - hidden.splice(index, 1); - visible.push(tab); - } - }, - - // Moves a given tab from the 'visible' to the 'hidden' bucket. - visibleToHidden: function (tab) { - let {visible, hidden} = this.tabs; - let index = visible.indexOf(tab); - - if (index > -1) { - visible.splice(index, 1); - hidden.push(tab); - } - }, - - /** - * Returns true if the passed tab is in one of the sets that we're - * restoring content in automatically. - * - * @param tab (<xul:tab>) - * The tab to check - * @returns bool - */ - willRestoreSoon: function (tab) { - let { priority, hidden, visible } = this.tabs; - let { restoreOnDemand, restorePinnedTabsOnDemand, - restoreHiddenTabs } = this.prefs; - let restorePinned = !(restoreOnDemand && restorePinnedTabsOnDemand); - let candidateSet = []; - - if (restorePinned && priority.length) - candidateSet.push(...priority); - - if (!restoreOnDemand) { - if (visible.length) - candidateSet.push(...visible); - - if (restoreHiddenTabs && hidden.length) - candidateSet.push(...hidden); - } - - return candidateSet.indexOf(tab) > -1; - }, -}; - -// A map storing a closed window's state data until it goes aways (is GC'ed). -// This ensures that API clients can still read (but not write) states of -// windows they still hold a reference to but we don't. -var DyingWindowCache = { - _data: new WeakMap(), - - has: function (window) { - return this._data.has(window); - }, - - get: function (window) { - return this._data.get(window); - }, - - set: function (window, data) { - this._data.set(window, data); - }, - - remove: function (window) { - this._data.delete(window); - } -}; - -// A weak set of dirty windows. We use it to determine which windows we need to -// recollect data for when getCurrentState() is called. -var DirtyWindows = { - _data: new WeakMap(), - - has: function (window) { - return this._data.has(window); - }, - - add: function (window) { - return this._data.set(window, true); - }, - - remove: function (window) { - this._data.delete(window); - }, - - clear: function (window) { - this._data = new WeakMap(); - } -}; - -// The state from the previous session (after restoring pinned tabs). This -// state is persisted and passed through to the next session during an app -// restart to make the third party add-on warning not trash the deferred -// session -var LastSession = { - _state: null, - - get canRestore() { - return !!this._state; - }, - - getState: function () { - return this._state; - }, - - setState: function (state) { - this._state = state; - }, - - clear: function () { - if (this._state) { - this._state = null; - Services.obs.notifyObservers(null, NOTIFY_LAST_SESSION_CLEARED, null); - } - } -}; |