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-rw-r--r--browser/components/sessionstore/SessionSaver.jsm264
1 files changed, 0 insertions, 264 deletions
diff --git a/browser/components/sessionstore/SessionSaver.jsm b/browser/components/sessionstore/SessionSaver.jsm
deleted file mode 100644
index d672f8877..000000000
--- a/browser/components/sessionstore/SessionSaver.jsm
+++ /dev/null
@@ -1,264 +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 = ["SessionSaver"];
-
-const Cu = Components.utils;
-const Cc = Components.classes;
-const Ci = Components.interfaces;
-
-Cu.import("resource://gre/modules/Timer.jsm", this);
-Cu.import("resource://gre/modules/Services.jsm", this);
-Cu.import("resource://gre/modules/XPCOMUtils.jsm", this);
-Cu.import("resource://gre/modules/TelemetryStopwatch.jsm", this);
-
-XPCOMUtils.defineLazyModuleGetter(this, "AppConstants",
- "resource://gre/modules/AppConstants.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "console",
- "resource://gre/modules/Console.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "PrivacyFilter",
- "resource:///modules/sessionstore/PrivacyFilter.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "RunState",
- "resource:///modules/sessionstore/RunState.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "SessionStore",
- "resource:///modules/sessionstore/SessionStore.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "SessionFile",
- "resource:///modules/sessionstore/SessionFile.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "PrivateBrowsingUtils",
- "resource://gre/modules/PrivateBrowsingUtils.jsm");
-
-// Minimal interval between two save operations (in milliseconds).
-XPCOMUtils.defineLazyGetter(this, "gInterval", function () {
- const PREF = "browser.sessionstore.interval";
-
- // Observer that updates the cached value when the preference changes.
- Services.prefs.addObserver(PREF, () => {
- this.gInterval = Services.prefs.getIntPref(PREF);
-
- // Cancel any pending runs and call runDelayed() with
- // zero to apply the newly configured interval.
- SessionSaverInternal.cancel();
- SessionSaverInternal.runDelayed(0);
- }, false);
-
- return Services.prefs.getIntPref(PREF);
-});
-
-// Notify observers about a given topic with a given subject.
-function notify(subject, topic) {
- Services.obs.notifyObservers(subject, topic, "");
-}
-
-// TelemetryStopwatch helper functions.
-function stopWatch(method) {
- return function (...histograms) {
- for (let hist of histograms) {
- TelemetryStopwatch[method]("FX_SESSION_RESTORE_" + hist);
- }
- };
-}
-
-var stopWatchStart = stopWatch("start");
-var stopWatchCancel = stopWatch("cancel");
-var stopWatchFinish = stopWatch("finish");
-
-/**
- * The external API implemented by the SessionSaver module.
- */
-this.SessionSaver = Object.freeze({
- /**
- * Immediately saves the current session to disk.
- */
- run: function () {
- return SessionSaverInternal.run();
- },
-
- /**
- * Saves the current session to disk delayed by a given amount of time. Should
- * another delayed run be scheduled already, we will ignore the given delay
- * and state saving may occur a little earlier.
- */
- runDelayed: function () {
- SessionSaverInternal.runDelayed();
- },
-
- /**
- * Sets the last save time to the current time. This will cause us to wait for
- * at least the configured interval when runDelayed() is called next.
- */
- updateLastSaveTime: function () {
- SessionSaverInternal.updateLastSaveTime();
- },
-
- /**
- * Cancels all pending session saves.
- */
- cancel: function () {
- SessionSaverInternal.cancel();
- }
-});
-
-/**
- * The internal API.
- */
-var SessionSaverInternal = {
- /**
- * The timeout ID referencing an active timer for a delayed save. When no
- * save is pending, this is null.
- */
- _timeoutID: null,
-
- /**
- * A timestamp that keeps track of when we saved the session last. We will
- * this to determine the correct interval between delayed saves to not deceed
- * the configured session write interval.
- */
- _lastSaveTime: 0,
-
- /**
- * Immediately saves the current session to disk.
- */
- run: function () {
- return this._saveState(true /* force-update all windows */);
- },
-
- /**
- * Saves the current session to disk delayed by a given amount of time. Should
- * another delayed run be scheduled already, we will ignore the given delay
- * and state saving may occur a little earlier.
- *
- * @param delay (optional)
- * The minimum delay in milliseconds to wait for until we collect and
- * save the current session.
- */
- runDelayed: function (delay = 2000) {
- // Bail out if there's a pending run.
- if (this._timeoutID) {
- return;
- }
-
- // Interval until the next disk operation is allowed.
- delay = Math.max(this._lastSaveTime + gInterval - Date.now(), delay, 0);
-
- // Schedule a state save.
- this._timeoutID = setTimeout(() => this._saveStateAsync(), delay);
- },
-
- /**
- * Sets the last save time to the current time. This will cause us to wait for
- * at least the configured interval when runDelayed() is called next.
- */
- updateLastSaveTime: function () {
- this._lastSaveTime = Date.now();
- },
-
- /**
- * Cancels all pending session saves.
- */
- cancel: function () {
- clearTimeout(this._timeoutID);
- this._timeoutID = null;
- },
-
- /**
- * Saves the current session state. Collects data and writes to disk.
- *
- * @param forceUpdateAllWindows (optional)
- * Forces us to recollect data for all windows and will bypass and
- * update the corresponding caches.
- */
- _saveState: function (forceUpdateAllWindows = false) {
- // Cancel any pending timeouts.
- this.cancel();
-
- if (PrivateBrowsingUtils.permanentPrivateBrowsing) {
- // Don't save (or even collect) anything in permanent private
- // browsing mode
-
- this.updateLastSaveTime();
- return Promise.resolve();
- }
-
- stopWatchStart("COLLECT_DATA_MS", "COLLECT_DATA_LONGEST_OP_MS");
- let state = SessionStore.getCurrentState(forceUpdateAllWindows);
- PrivacyFilter.filterPrivateWindowsAndTabs(state);
-
- // Make sure that we keep the previous session if we started with a single
- // private window and no non-private windows have been opened, yet.
- if (state.deferredInitialState) {
- state.windows = state.deferredInitialState.windows || [];
- delete state.deferredInitialState;
- }
-
- if (AppConstants.platform != "macosx") {
- // We want to restore closed windows that are marked with _shouldRestore.
- // We're doing this here because we want to control this only when saving
- // the file.
- while (state._closedWindows.length) {
- let i = state._closedWindows.length - 1;
-
- if (!state._closedWindows[i]._shouldRestore) {
- // We only need to go until _shouldRestore
- // is falsy since we're going in reverse.
- break;
- }
-
- delete state._closedWindows[i]._shouldRestore;
- state.windows.unshift(state._closedWindows.pop());
- }
- }
-
- // Clear all cookies on clean shutdown according to user preferences
- if (RunState.isClosing) {
- let expireCookies = Services.prefs.getIntPref("network.cookie.lifetimePolicy") ==
- Services.cookies.QueryInterface(Ci.nsICookieService).ACCEPT_SESSION;
- let sanitizeCookies = Services.prefs.getBoolPref("privacy.sanitize.sanitizeOnShutdown") &&
- Services.prefs.getBoolPref("privacy.clearOnShutdown.cookies");
- let restart = Services.prefs.getBoolPref("browser.sessionstore.resume_session_once");
- // Don't clear cookies when restarting
- if ((expireCookies || sanitizeCookies) && !restart) {
- for (let window of state.windows) {
- delete window.cookies;
- }
- }
- }
-
- stopWatchFinish("COLLECT_DATA_MS", "COLLECT_DATA_LONGEST_OP_MS");
- return this._writeState(state);
- },
-
- /**
- * Saves the current session state. Collects data asynchronously and calls
- * _saveState() to collect data again (with a cache hit rate of hopefully
- * 100%) and write to disk afterwards.
- */
- _saveStateAsync: function () {
- // Allow scheduling delayed saves again.
- this._timeoutID = null;
-
- // Write to disk.
- this._saveState();
- },
-
- /**
- * Write the given state object to disk.
- */
- _writeState: function (state) {
- // We update the time stamp before writing so that we don't write again
- // too soon, if saving is requested before the write completes. Without
- // this update we may save repeatedly if actions cause a runDelayed
- // before writing has completed. See Bug 902280
- this.updateLastSaveTime();
-
- // Write (atomically) to a session file, using a tmp file. Once the session
- // file is successfully updated, save the time stamp of the last save and
- // notify the observers.
- return SessionFile.write(state).then(() => {
- this.updateLastSaveTime();
- notify(null, "sessionstore-state-write-complete");
- }, console.error);
- },
-};
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