/* 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"; ChromeUtils.import("resource://gre/modules/AppConstants.jsm"); ChromeUtils.import("resource://gre/modules/XPCOMUtils.jsm"); ChromeUtils.import("resource://gre/modules/Services.jsm"); XPCOMUtils.defineLazyModuleGetters(this, { EventDispatcher: "resource://gre/modules/Messaging.jsm", FormData: "resource://gre/modules/FormData.jsm", OS: "resource://gre/modules/osfile.jsm", PrivacyFilter: "resource://gre/modules/sessionstore/PrivacyFilter.jsm", PrivateBrowsingUtils: "resource://gre/modules/PrivateBrowsingUtils.jsm", ScrollPosition: "resource://gre/modules/ScrollPosition.jsm", SessionHistory: "resource://gre/modules/sessionstore/SessionHistory.jsm", SharedPreferences: "resource://gre/modules/SharedPreferences.jsm", Task: "resource://gre/modules/Task.jsm", TelemetryStopwatch: "resource://gre/modules/TelemetryStopwatch.jsm", Utils: "resource://gre/modules/sessionstore/Utils.jsm", }); XPCOMUtils.defineLazyModuleGetter(this, "Log", "resource://gre/modules/AndroidLog.jsm", "AndroidLog"); function dump(a) { Services.console.logStringMessage(a); } let loggingEnabled = false; function log(a) { if (!loggingEnabled) { return; } Log.d("SessionStore", a); } // ----------------------------------------------------------------------- // Session Store // ----------------------------------------------------------------------- const INVALID_TAB_ID = -1; const INVALID_TAB_INDEX = -1; const STATE_STOPPED = 0; const STATE_RUNNING = 1; const STATE_QUITTING = -1; const STATE_QUITTING_FLUSHED = -2; const PREFS_RESTORE_FROM_CRASH = "browser.sessionstore.resume_from_crash"; const PREFS_MAX_CRASH_RESUMES = "browser.sessionstore.max_resumed_crashes"; const PREFS_MAX_TABS_UNDO = "browser.sessionstore.max_tabs_undo"; const MINIMUM_SAVE_DELAY = 2000; const SAVE_INTERVAL_PRIVATE_TABS = 500; function SessionStore() { } function sendEvent(browser, event) { let evt = new Event(event, {"bubbles": true, "cancelable": false}); browser.dispatchEvent(evt); } SessionStore.prototype = { classID: Components.ID("{8c1f07d6-cba3-4226-a315-8bd43d67d032}"), QueryInterface: ChromeUtils.generateQI([Ci.nsISessionStore, Ci.nsIObserver, Ci.nsISupportsWeakReference]), _windows: {}, _lastSaveTime: 0, _lastQueuedSaveTime: 0, _lastBackupTime: 0, _interval: 10000, _backupInterval: 120000, // 2 minutes _maxTabsUndo: 5, _pendingWrite: 0, _pendingWritePrivateOnly: 0, _scrollSavePending: null, _formdataSavePending: null, _writeInProgress: false, // We only want to start doing backups if we've successfully // written the session data at least once. _sessionDataIsGood: false, // The index where the most recently closed tab was in the tabs array // when it was closed. _lastClosedTabIndex: INVALID_TAB_INDEX, // Whether or not to send notifications for changes to the closed tabs. _notifyClosedTabs: false, // If we're simultaneously closing both a tab and Firefox, we don't want // to bother reloading the newly selected tab if it is zombified. // The Java UI will tell us which tab to watch out for. _keepAsZombieTabId: INVALID_TAB_ID, init: function ss_init() { loggingEnabled = Services.prefs.getBoolPref("browser.sessionstore.debug_logging"); // Get file references this._sessionFile = Services.dirsvc.get("ProfD", Ci.nsIFile); this._sessionFileBackup = this._sessionFile.clone(); this._sessionFilePrevious = this._sessionFile.clone(); this._sessionFileTemp = this._sessionFile.clone(); this._sessionFile.append("sessionstore.js"); // The main session store save file. this._sessionFileBackup.append("sessionstore.bak"); // A backup copy to guard against interrupted writes. this._sessionFilePrevious.append("sessionstore.old"); // The previous session's file, used for what used to be the "Tabs from last time". this._sessionFileTemp.append(this._sessionFile.leafName + ".tmp"); // Temporary file for writing changes to disk. this._loadState = STATE_STOPPED; this._startupRestoreFinished = false; this._interval = Services.prefs.getIntPref("browser.sessionstore.interval"); this._backupInterval = Services.prefs.getIntPref("browser.sessionstore.backupInterval"); this._updateMaxTabsUndo(); Services.prefs.addObserver(PREFS_MAX_TABS_UNDO, () => { this._updateMaxTabsUndo(); }); // Copy changes in Gecko settings to their Java counterparts, // so the startup code can access them SharedPreferences.forApp().setBoolPref(PREFS_RESTORE_FROM_CRASH, Services.prefs.getBoolPref(PREFS_RESTORE_FROM_CRASH)); SharedPreferences.forApp().setIntPref(PREFS_MAX_CRASH_RESUMES, Services.prefs.getIntPref(PREFS_MAX_CRASH_RESUMES)); }, _updateMaxTabsUndo: function ss_updateMaxTabsUndo() { this._maxTabsUndo = Services.prefs.getIntPref(PREFS_MAX_TABS_UNDO); if (this._maxTabsUndo == 0) { this._forgetClosedTabs(); } }, _purgeHistory: function ss_purgeHistory(topic) { log(topic); this._clearDisk(); // Clear all data about closed tabs this._forgetClosedTabs(); // Clear all cached session history data. if (topic == "browser:purge-session-history") { this._forEachBrowserWindow((window) => { let tabs = window.BrowserApp.tabs; for (let i = 0; i < tabs.length; i++) { let data = tabs[i].browser.__SS_data; let sHistory = data.entries; // Copy the current history entry to the end... sHistory.push(sHistory[data.index - 1]); // ... and then remove everything else. sHistory.splice(0, sHistory.length - 1); data.index = 1; } }); } if (this._loadState == STATE_RUNNING) { // Save the purged state immediately this.saveState(); } else if (this._loadState <= STATE_QUITTING) { this.saveStateDelayed(); if (this._loadState == STATE_QUITTING_FLUSHED) { this.flushPendingState(); } } Services.obs.notifyObservers(null, "sessionstore-state-purge-complete"); if (this._notifyClosedTabs) { this._sendClosedTabsToJava(Services.wm.getMostRecentWindow("navigator:browser")); } }, _clearDisk: function ss_clearDisk() { this._sessionDataIsGood = false; this._lastBackupTime = 0; if (this._loadState > STATE_QUITTING) { OS.File.remove(this._sessionFile.path); OS.File.remove(this._sessionFileBackup.path); OS.File.remove(this._sessionFilePrevious.path); OS.File.remove(this._sessionFileTemp.path); } else { // We're shutting down and must delete synchronously if (this._sessionFile.exists()) { this._sessionFile.remove(false); } if (this._sessionFileBackup.exists()) { this._sessionFileBackup.remove(false); } if (this._sessionFilePrevious.exists()) { this._sessionFilePrevious.remove(false); } if (this._sessionFileTemp.exists()) { this._sessionFileTemp.remove(false); } } }, _forgetClosedTabs: function ss_forgetClosedTabs() { for (let win of Object.values(this._windows)) { win.closedTabs = []; } this._lastClosedTabIndex = INVALID_TAB_INDEX; }, onEvent: function ss_onEvent(event, data, callback) { switch (event) { case "ClosedTabs:StartNotifications": this._notifyClosedTabs = true; log("ClosedTabs:StartNotifications"); this._sendClosedTabsToJava(Services.wm.getMostRecentWindow("navigator:browser")); break; case "ClosedTabs:StopNotifications": this._notifyClosedTabs = false; log("ClosedTabs:StopNotifications"); break; case "Session:FlushTabs": // We receive this notification when the activity or application is going into // the background. If the application is backgrounded, it may be terminated at // any point without notice; therefore, we must synchronously write out any // pending save state to ensure that this data does not get lost. log("Session:FlushTabs"); if (!this._loadState == STATE_RUNNING || !this.flushPendingState()) { let window = Services.wm.getMostRecentWindow("navigator:browser"); if (window) { // can be null if we're restarting window.WindowEventDispatcher.sendRequest({ type: "PrivateBrowsing:Data", noChange: true }); } } break; case "Session:Restore": { EventDispatcher.instance.unregisterListener(this, "Session:Restore"); if (data) { // Be ready to handle any restore failures by making sure we have a valid tab opened let window = Services.wm.getMostRecentWindow("navigator:browser"); let restoreCleanup = (aSubject, aTopic, aData) => { Services.obs.removeObserver(restoreCleanup, "sessionstore-windows-restored"); if (window.BrowserApp.tabs.length == 0) { window.BrowserApp.addTab("about:home", { selected: true }); } // Normally, _restoreWindow() will have set this to true already, // but we want to make sure it's set even in case of a restore failure. this._startupRestoreFinished = true; log("startupRestoreFinished = true (through notification)"); }; Services.obs.addObserver(restoreCleanup, "sessionstore-windows-restored"); // Do a restore, triggered by Java this.restoreLastSession(data.sessionString); } else { // Not doing a restore; just send restore message this._startupRestoreFinished = true; log("startupRestoreFinished = true"); Services.obs.notifyObservers(null, "sessionstore-windows-restored"); } break; } case "Session:RestoreRecentTabs": this._restoreTabs(data); break; case "Tab:KeepZombified": { if (data.nextSelectedTabId >= 0) { this._keepAsZombieTabId = data.nextSelectedTabId; log("Tab:KeepZombified " + data.nextSelectedTabId); } break; } case "Tabs:OpenMultiple": { this._openTabs(data); if (data.shouldNotifyTabsOpenedToJava) { let window = Services.wm.getMostRecentWindow("navigator:browser"); window.WindowEventDispatcher.sendRequest({ type: "Tabs:TabsOpened" }); } break; } } }, observe: function ss_observe(aSubject, aTopic, aData) { let observerService = Services.obs; switch (aTopic) { case "app-startup": EventDispatcher.instance.registerListener(this, [ "ClosedTabs:StartNotifications", "ClosedTabs:StopNotifications", "Session:FlushTabs", "Session:Restore", "Session:RestoreRecentTabs", "Tab:KeepZombified", "Tabs:OpenMultiple", ]); observerService.addObserver(this, "final-ui-startup", true); observerService.addObserver(this, "domwindowopened", true); observerService.addObserver(this, "domwindowclosed", true); observerService.addObserver(this, "browser:purge-session-history", true); observerService.addObserver(this, "browser:purge-session-tabs", true); observerService.addObserver(this, "quit-application-requested", true); observerService.addObserver(this, "quit-application-proceeding", true); observerService.addObserver(this, "quit-application", true); observerService.addObserver(this, "Session:NotifyLocationChange", true); observerService.addObserver(this, "Content:HistoryChange", true); observerService.addObserver(this, "application-foreground", true); observerService.addObserver(this, "last-pb-context-exited", true); break; case "final-ui-startup": observerService.removeObserver(this, "final-ui-startup"); this.init(); break; case "domwindowopened": { let window = aSubject; window.addEventListener("load", () => { this.onWindowOpen(window); }, { once: true }); break; } case "domwindowclosed": // catch closed windows this.onWindowClose(aSubject); break; case "quit-application-requested": log("quit-application-requested"); // Get a current snapshot of all windows if (this._pendingWrite) { this._forEachBrowserWindow((aWindow) => { this._collectWindowData(aWindow); }); } break; case "quit-application-proceeding": log("quit-application-proceeding"); // Freeze the data at what we've got (ignoring closing windows) this._loadState = STATE_QUITTING; break; case "quit-application": log("quit-application"); observerService.removeObserver(this, "domwindowopened"); observerService.removeObserver(this, "domwindowclosed"); observerService.removeObserver(this, "quit-application-requested"); observerService.removeObserver(this, "quit-application-proceeding"); observerService.removeObserver(this, "quit-application"); // Flush all pending writes to disk now this.flushPendingState(); this._loadState = STATE_QUITTING_FLUSHED; break; case "browser:purge-session-tabs": case "browser:purge-session-history": // catch sanitization this._purgeHistory(aTopic); break; case "timer-callback": if (this._loadState == STATE_RUNNING) { // Timer call back for delayed saving this._saveTimer = null; log("timer-callback, pendingWrite = " + this._pendingWritePrivateOnly + "/" + this._pendingWrite); if (this._pendingWrite) { this._saveState(true); } } break; case "Session:NotifyLocationChange": { let browser = aSubject; if (browser.__SS_restoreReloadPending && this._startupRestoreFinished) { delete browser.__SS_restoreReloadPending; log("remove restoreReloadPending"); } if (browser.__SS_restoreDataOnLocationChange) { delete browser.__SS_restoreDataOnLocationChange; this._restoreZoom(browser.__SS_data.scrolldata, browser); } break; } case "Content:HistoryChange": { let browser = aSubject; let window = browser.ownerGlobal; log("Content:HistoryChange for tab " + window.BrowserApp.getTabForBrowser(browser).id); // We want to ignore history changes which we caused ourselves when // restoring the history of a delay-loaded tab. if (!browser.__SS_restore && !browser.__SS_restoreReloadPending) { // The OnHistory... notifications are called *before* the history changes // are persisted. We therefore need to make our onTabLoad call async, // so it can actually capture the new session history state. if (browser.__SS_historyChange) { window.clearTimeout(browser.__SS_historyChange); } browser.__SS_historyChange = window.setTimeout(() => { delete browser.__SS_historyChange; this.onTabLoad(window, browser); }, 0); } break; } case "application-foreground": log("application-foreground"); // If we skipped restoring a zombified tab before backgrounding, // we might have to do it now instead. let window = Services.wm.getMostRecentWindow("navigator:browser"); if (window && window.BrowserApp) { // Might not yet be ready during a cold startup. let tab = window.BrowserApp.selectedTab; if (tab) { // Can be null if closing a tab triggered an activity switch. this.restoreZombieTab(tab); } } break; case "last-pb-context-exited": // Clear private closed tab data when we leave private browsing. for (let window of Object.values(this._windows)) { window.closedTabs = window.closedTabs.filter(tab => !tab.isPrivate); } this._lastClosedTabIndex = INVALID_TAB_INDEX; break; } }, handleEvent: function ss_handleEvent(aEvent) { let window = aEvent.currentTarget.ownerGlobal; switch (aEvent.type) { case "TabOpen": { let browser = aEvent.target; log("TabOpen for tab " + window.BrowserApp.getTabForBrowser(browser).id); this.onTabAdd(window, browser); break; } case "TabClose": { let browser = aEvent.target; log("TabClose for tab " + window.BrowserApp.getTabForBrowser(browser).id); this.onTabClose(window, browser, aEvent.detail); this.onTabRemove(window, browser); break; } case "TabPreZombify": { let browser = aEvent.target; log("TabPreZombify for tab " + window.BrowserApp.getTabForBrowser(browser).id); this.onTabRemove(window, browser, true); break; } case "TabPostZombify": { let browser = aEvent.target; log("TabPostZombify for tab " + window.BrowserApp.getTabForBrowser(browser).id); this.onTabAdd(window, browser, true); break; } case "TabSelect": { let browser = aEvent.target; log("TabSelect for tab " + window.BrowserApp.getTabForBrowser(browser).id); this.onTabSelect(window, browser); break; } case "TabMove": { let browser = aEvent.target; log("TabMove for tab " + window.BrowserApp.getTabForBrowser(browser).id); this.onTabMove(); break; } case "DOMTitleChanged": { // Use DOMTitleChanged to detect page loads over alternatives. // onLocationChange happens too early, so we don't have the page title // yet; pageshow happens too late, so we could lose session data if the // browser were killed. let browser = aEvent.currentTarget; log("DOMTitleChanged for tab " + window.BrowserApp.getTabForBrowser(browser).id); this.onTabLoad(window, browser); break; } case "load": { let browser = aEvent.currentTarget; // Skip subframe loads. if (browser.contentDocument !== aEvent.originalTarget) { return; } // Handle restoring the text data into the content and frames. // We wait until the main content and all frames are loaded // before trying to restore this data. log("load for tab " + window.BrowserApp.getTabForBrowser(browser).id); if (browser.__SS_restoreDataOnLoad) { delete browser.__SS_restoreDataOnLoad; this._restoreTextData(browser.__SS_data.formdata, browser); } break; } case "pageshow": case "AboutReaderContentReady": { let browser = aEvent.currentTarget; // Skip subframe pageshows. if (browser.contentDocument !== aEvent.originalTarget) { return; } if (browser.currentURI.spec.startsWith("about:reader") && !browser.contentDocument.body.classList.contains("loaded")) { // Don't restore the scroll position of an about:reader page at this point; // wait for the custom event dispatched from AboutReader.jsm instead. return; } // Restoring the scroll position needs to happen after the zoom level has been // restored, which is done by the MobileViewportManager either on first paint // or on load, whichever comes first. // In the latter case, our load handler runs before the MVM's one, which is the // wrong way around, so we have to use a later event instead. log(aEvent.type + " for tab " + window.BrowserApp.getTabForBrowser(browser).id); if (browser.__SS_restoreDataOnPageshow) { delete browser.__SS_restoreDataOnPageshow; this._restoreScrollPosition(browser.__SS_data.scrolldata, browser); } else { // We're not restoring, capture the initial scroll position on pageshow. this.onTabScroll(window, browser); } break; } case "input": case "DOMAutoComplete": { let browser = aEvent.currentTarget; // Duplicated logging check to avoid calling getTabForBrowser on each input event. if (loggingEnabled) { log("TabInput for tab " + window.BrowserApp.getTabForBrowser(browser).id); } // Schedule saving instead of doing it immediately - immediate save will block activity, and in // cases like checking or unchecking 100 checkboxes, this can cause long delays. (bug 1443765) // XXX This may be better handled with idle detection similar to desktop (bug 1444222) if (!this._formdataSavePending) { this._formdataSavePending = window.setTimeout(() => { this._formdataSavePending = null; this.onTabInput(window, browser); }, 2000); } break; } case "resize": case "scroll": { let browser = aEvent.currentTarget; // Duplicated logging check to avoid calling getTabForBrowser on each scroll event. if (loggingEnabled) { log(aEvent.type + " for tab " + window.BrowserApp.getTabForBrowser(browser).id); } if (!this._scrollSavePending) { this._scrollSavePending = window.setTimeout(() => { this._scrollSavePending = null; this.onTabScroll(window, browser); }, 500); } break; } } }, onWindowOpen: function ss_onWindowOpen(aWindow) { // Return if window has already been initialized if (aWindow && aWindow.__SSID && this._windows[aWindow.__SSID]) { return; } // Ignore non-browser windows and windows opened while shutting down if (aWindow.document.documentElement.getAttribute("windowtype") != "navigator:browser" || this._loadState <= STATE_QUITTING) { return; } // Assign it a unique identifier (timestamp) and create its data object aWindow.__SSID = "window" + Date.now(); this._windows[aWindow.__SSID] = { tabs: [], selectedTabId: INVALID_TAB_ID, closedTabs: [] }; // Perform additional initialization when the first window is loading if (this._loadState == STATE_STOPPED) { this._loadState = STATE_RUNNING; this._lastSaveTime = Date.now(); } // Add tab change listeners to all already existing tabs let tabs = aWindow.BrowserApp.tabs; for (let i = 0; i < tabs.length; i++) this.onTabAdd(aWindow, tabs[i].browser, true); // Notification of tab add/remove/selection/zombification let browsers = aWindow.document.getElementById("browsers"); browsers.addEventListener("TabOpen", this, true); browsers.addEventListener("TabClose", this, true); browsers.addEventListener("TabSelect", this, true); browsers.addEventListener("TabMove", this, true); browsers.addEventListener("TabPreZombify", this, true); browsers.addEventListener("TabPostZombify", this, true); }, onWindowClose: function ss_onWindowClose(aWindow) { // Ignore windows not tracked by SessionStore if (!aWindow.__SSID || !this._windows[aWindow.__SSID]) { return; } let browsers = aWindow.document.getElementById("browsers"); browsers.removeEventListener("TabOpen", this, true); browsers.removeEventListener("TabClose", this, true); browsers.removeEventListener("TabSelect", this, true); browsers.removeEventListener("TabMove", this, true); browsers.removeEventListener("TabPreZombify", this, true); browsers.removeEventListener("TabPostZombify", this, true); if (this._loadState == STATE_RUNNING) { // Update all window data for a last time this._collectWindowData(aWindow); // Clear this window from the list delete this._windows[aWindow.__SSID]; // Save the state without this window to disk this.saveStateDelayed(); } let tabs = aWindow.BrowserApp.tabs; for (let i = 0; i < tabs.length; i++) this.onTabRemove(aWindow, tabs[i].browser, true); delete aWindow.__SSID; }, onTabAdd: function ss_onTabAdd(aWindow, aBrowser, aNoNotification) { // Use DOMTitleChange to catch the initial load and restore history aBrowser.addEventListener("DOMTitleChanged", this, true); // Use load to restore text data aBrowser.addEventListener("load", this, true); // Gecko might set the initial zoom level after the JS "load" event, // so we have to restore zoom and scroll position after that. aBrowser.addEventListener("pageshow", this, true); aBrowser.addEventListener("AboutReaderContentReady", this, true); // Use a combination of events to watch for text data changes aBrowser.addEventListener("input", this, true); aBrowser.addEventListener("DOMAutoComplete", this, true); // Record the current scroll position and zoom level. aBrowser.addEventListener("scroll", this, true); aBrowser.addEventListener("resize", this, true); log("onTabAdd() ran for tab " + aWindow.BrowserApp.getTabForBrowser(aBrowser).id + ", aNoNotification = " + aNoNotification); if (!aNoNotification) { if (this._loadState == STATE_QUITTING) { // A tab arrived just as were starting to shut down. Since we haven't yet received // application-quit, we refresh the window data one more time before the window closes. this._forEachBrowserWindow((aWindow) => { this._collectWindowData(aWindow); }); } this.saveStateDelayed(); } this._updateCrashReportURL(aWindow); }, onTabRemove: function ss_onTabRemove(aWindow, aBrowser, aNoNotification) { // Cleanup event listeners aBrowser.removeEventListener("DOMTitleChanged", this, true); aBrowser.removeEventListener("load", this, true); aBrowser.removeEventListener("pageshow", this, true); aBrowser.removeEventListener("AboutReaderContentReady", this, true); aBrowser.removeEventListener("input", this, true); aBrowser.removeEventListener("DOMAutoComplete", this, true); aBrowser.removeEventListener("scroll", this, true); aBrowser.removeEventListener("resize", this, true); if (aBrowser.__SS_historyChange) { aWindow.clearTimeout(aBrowser.__SS_historyChange); delete aBrowser.__SS_historyChange; } delete aBrowser.__SS_data; log("onTabRemove() ran for tab " + aWindow.BrowserApp.getTabForBrowser(aBrowser).id + ", aNoNotification = " + aNoNotification); if (!aNoNotification) { let isPrivate = PrivateBrowsingUtils.isBrowserPrivate(aBrowser); this.saveStateDelayed(isPrivate); } }, onTabClose: function ss_onTabClose(aWindow, aBrowser, aTabIndex) { // collect any pending data before saving if (this._formdataSavePending) { this.onTabInput(aWindow, aBrowser); } if (this._scrollSavePending) { this.onTabScroll(aWindow, aBrowser); } let data = aBrowser.__SS_data; let tab = aWindow.BrowserApp.getTabForId(data.tabId); if (this._maxTabsUndo == 0 || this._sessionDataIsEmpty(data)) { this._lastClosedTabIndex = INVALID_TAB_INDEX; return; } if (aWindow.BrowserApp.tabs.length > 0) { // Bundle this browser's data and extra data and save in the closedTabs // window property data.extData = aBrowser.__SS_extdata || {}; this._windows[aWindow.__SSID].closedTabs.unshift(data); let length = this._windows[aWindow.__SSID].closedTabs.length; if (length > this._maxTabsUndo) { this._windows[aWindow.__SSID].closedTabs.splice(this._maxTabsUndo, length - this._maxTabsUndo); } this._lastClosedTabIndex = aTabIndex; if (this._notifyClosedTabs) { this._sendClosedTabsToJava(aWindow); } log("onTabClose() ran for tab " + tab.id); sendEvent(aBrowser, "SSTabCloseProcessed"); } }, _sessionDataIsEmpty: function ss_sessionDataIsEmpty(aData) { if (!aData || !aData.entries || aData.entries.length == 0) { return true; } let entries = aData.entries; return (entries.length == 1 && (entries[0].url == "about:home" || entries[0].url == "about:privatebrowsing")); }, onTabLoad: function ss_onTabLoad(aWindow, aBrowser) { // If this browser belongs to a zombie tab or the initial restore hasn't yet finished, // skip any session save activity. if (aBrowser.__SS_restore || !this._startupRestoreFinished || aBrowser.__SS_restoreReloadPending) { return; } // Ignore a transient "about:blank" if (!aBrowser.canGoBack && aBrowser.currentURI.spec == "about:blank") { return; } // Serialize the tab's session history data. let data = SessionHistory.collect(aBrowser.docShell); if (!data.index) { // Bail out if we couldn't collect even basic fallback data. return; } // Filter out any top level "wyciwyg" entries that might have come through. // Once we can figure out a GroupedSHistory-compatible way of doing this, // we should move this into SessionHistory.jsm (see bug 1340874). let historyIndex = data.index - 1; for (let i = 0; i < data.entries.length; i++) { if (data.entries[i].url.startsWith("wyciwyg")) { // Adjust the index to account for skipped history entries. if (i <= historyIndex) { data.index--; historyIndex--; } data.entries.splice(i, 1); i--; } } let formdata; let scrolldata; if (aBrowser.__SS_data) { formdata = aBrowser.__SS_data.formdata; scrolldata = aBrowser.__SS_data.scrolldata; } delete aBrowser.__SS_data; // Collect the rest of the tab data and merge it with the history collected above. this._collectTabData(aWindow, aBrowser, data); if (aBrowser.__SS_restoreDataOnLoad || aBrowser.__SS_restoreDataOnPageshow) { // If the tab has been freshly restored and the "load" or "pageshow" // events haven't yet fired, we need to preserve any form data and // scroll positions that might have been present. aBrowser.__SS_data.formdata = formdata; aBrowser.__SS_data.scrolldata = scrolldata; } else { // When navigating via the forward/back buttons, Gecko restores // the form data all by itself and doesn't invoke any input events. // As _collectTabData() doesn't save any form data, we need to manually // capture it to bridge the time until the next input event arrives. this.onTabInput(aWindow, aBrowser); // A similar thing applies for the scroll position, otherwise a stray // DOMTitleChanged event can clobber the scroll position if the user // doesn't scroll again afterwards. this.onTabScroll(aWindow, aBrowser); } log("onTabLoad() ran for tab " + aWindow.BrowserApp.getTabForBrowser(aBrowser).id); sendEvent(aBrowser, "SSTabDataUpdated"); this.saveStateDelayed(); this._updateCrashReportURL(aWindow); }, onTabSelect: function ss_onTabSelect(aWindow, aBrowser) { if (this._loadState != STATE_RUNNING) { return; } let tab = aWindow.BrowserApp.getTabForBrowser(aBrowser); let tabId = tab.id; this._windows[aWindow.__SSID].selectedTabId = tabId; // Restore the resurrected browser if (tabId != this._keepAsZombieTabId) { this.restoreZombieTab(tab); } else { log("keeping as zombie tab " + tabId); } // The tab id passed through Tab:KeepZombified is valid for one TabSelect only. this._keepAsZombieTabId = INVALID_TAB_ID; log("onTabSelect() ran for tab " + tabId); this.saveStateDelayed(); this._updateCrashReportURL(aWindow); // If the selected tab has changed while listening for closed tab // notifications, we may have switched between different private browsing // modes. if (this._notifyClosedTabs) { this._sendClosedTabsToJava(aWindow); } }, restoreZombieTab: function ss_restoreZombieTab(aTab) { if (!aTab.browser.__SS_restore) { return; } let browser = aTab.browser; let data = browser.__SS_data; this._restoreTab(data, browser); delete browser.__SS_restore; browser.removeAttribute("pending"); log("restoring zombie tab " + aTab.id); }, onTabMove: function ss_onTabMove() { if (this._loadState != STATE_RUNNING) { return; } // The long press that initiated the move canceled any close undo option that may have been // present. this._lastClosedTabIndex = INVALID_TAB_INDEX; this.saveStateDelayed(); }, onTabInput: function ss_onTabInput(aWindow, aBrowser) { // If we've been called directly, cancel any pending timeouts. if (this._formdataSavePending) { aWindow.clearTimeout(this._formdataSavePending); this._formdataSavePending = null; log("onTabInput() clearing pending timeout"); } // If this browser belongs to a zombie tab or the initial restore hasn't yet finished, // skip any session save activity. if (aBrowser.__SS_restore || !this._startupRestoreFinished || aBrowser.__SS_restoreReloadPending) { sendEvent(aBrowser, "SSTabInputCaptured"); return; } // Don't bother trying to save text data if we don't have history yet let data = aBrowser.__SS_data; if (!data || data.entries.length == 0) { sendEvent(aBrowser, "SSTabInputCaptured"); return; } // Store the form data. let content = aBrowser.contentWindow; let [formdata] = Utils.mapFrameTree(content, FormData.collect); formdata = PrivacyFilter.filterFormData(formdata || {}); // If we found any form data, main content or frames, let's save it if (formdata && Object.keys(formdata).length) { data.formdata = formdata; log("onTabInput() ran for tab " + aWindow.BrowserApp.getTabForBrowser(aBrowser).id); this.saveStateDelayed(); } sendEvent(aBrowser, "SSTabInputCaptured"); }, onTabScroll: function ss_onTabScroll(aWindow, aBrowser) { // If we've been called directly, cancel any pending timeouts. if (this._scrollSavePending) { aWindow.clearTimeout(this._scrollSavePending); this._scrollSavePending = null; log("onTabScroll() clearing pending timeout"); } // If this browser belongs to a zombie tab or the initial restore hasn't yet finished, // skip any session save activity. if (aBrowser.__SS_restore || !this._startupRestoreFinished || aBrowser.__SS_restoreReloadPending) { return; } // Don't bother trying to save scroll positions if we don't have history yet. let data = aBrowser.__SS_data; if (!data || data.entries.length == 0) { return; } // Neither bother if we're yet to restore the previous scroll position. if (aBrowser.__SS_restoreDataOnLoad || aBrowser.__SS_restoreDataOnPageshow) { return; } // Save the scroll position itself. let content = aBrowser.contentWindow; let [scrolldata] = Utils.mapFrameTree(content, ScrollPosition.collect); scrolldata = scrolldata || {}; // Save the current document resolution. let zoom = { value: 1 }; content.QueryInterface(Ci.nsIInterfaceRequestor).getInterface( Ci.nsIDOMWindowUtils).getResolution(zoom); scrolldata.zoom = {}; scrolldata.zoom.resolution = zoom.value; log("onTabScroll() zoom level: " + zoom.value); // Save some data that'll help in adjusting the zoom level // when restoring in a different screen orientation. scrolldata.zoom.displaySize = this._getContentViewerSize(content); log("onTabScroll() displayWidth: " + scrolldata.zoom.displaySize.width); // Save zoom and scroll data. data.scrolldata = scrolldata; log("onTabScroll() ran for tab " + aWindow.BrowserApp.getTabForBrowser(aBrowser).id); sendEvent(aBrowser, "SSTabScrollCaptured"); this.saveStateDelayed(); }, _getContentViewerSize: function ss_getContentViewerSize(aWindow) { let displaySize = {}; let width = {}, height = {}; aWindow.QueryInterface(Ci.nsIInterfaceRequestor).getInterface( Ci.nsIDOMWindowUtils).getContentViewerSize(width, height); displaySize.width = width.value; displaySize.height = height.value; return displaySize; }, saveStateDelayed: function ss_saveStateDelayed(aPrivateTabsOnly = false) { this._pendingWrite++; if (aPrivateTabsOnly) { this._pendingWritePrivateOnly++; } log("incrementing _pendingWrite to " + this._pendingWritePrivateOnly + "/" + this._pendingWrite); if (!this._saveTimer) { // Interval until the next disk operation is allowed let currentDelay = this._lastSaveTime + this._interval - Date.now(); // If we have to wait, set a timer, otherwise saveState directly let delay = aPrivateTabsOnly ? SAVE_INTERVAL_PRIVATE_TABS : Math.max(currentDelay, MINIMUM_SAVE_DELAY); if (delay > 0) { this._createTimer(delay); } else { log("saveStateDelayed() no delay"); this.saveState(); } } else if (aPrivateTabsOnly && // How long until the current timer would fire? this._saveTimer.delay - (Date.now() - this._lastQueuedSaveTime) > SAVE_INTERVAL_PRIVATE_TABS) { this._killTimer(); this._createTimer(SAVE_INTERVAL_PRIVATE_TABS); } else { log("saveStateDelayed() timer already running, taking no action"); } }, saveState: function ss_saveState(aPrivateTabsOnly = false) { this._pendingWrite++; if (aPrivateTabsOnly) { this._pendingWritePrivateOnly++; } log("saveState(), incrementing _pendingWrite to " + this._pendingWritePrivateOnly + "/" + this._pendingWrite); this._saveState(true); }, /** * Immediately and synchronously writes any pending state to disk. * * @return True if data was written, false if no pending file writes were present. */ flushPendingState: function ss_flushPendingState() { log("flushPendingState(), _pendingWrite = " + this._pendingWrite); if (this._pendingWrite) { this._saveState(false); return true; } return false; }, _createTimer: function ss_createTimer(aDelay) { this._lastQueuedSaveTime = Date.now(); this._saveTimer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer); this._saveTimer.init(this, aDelay, Ci.nsITimer.TYPE_ONE_SHOT); log("saveTimer delay = " + aDelay); }, _killTimer: function ss_killTimer() { if (this._saveTimer) { this._saveTimer.cancel(); this._saveTimer = null; log("killed queued saveTimer"); } }, _saveState: function ss_saveState(aAsync) { log("_saveState(aAsync = " + aAsync + ")"); // Kill any queued timer and save immediately this._killTimer(); // Periodically save a "known good" copy of the session store data. if (!this._writeInProgress && Date.now() - this._lastBackupTime > this._backupInterval && this._sessionDataIsGood && this._sessionFile.exists()) { if (this._sessionFileBackup.exists()) { this._sessionFileBackup.remove(false); } log("_saveState() backing up session data"); this._sessionFile.copyTo(null, this._sessionFileBackup.leafName); this._lastBackupTime = Date.now(); } let data = this._getCurrentState(); let normalData = { windows: [] }; let privateData = { windows: [] }; log("_saveState() current state collected"); for (let winIndex = 0; winIndex < data.windows.length; ++winIndex) { let win = data.windows[winIndex]; let normalWin = {}; for (let prop in win) { normalWin[prop] = data[prop]; } // This particular attribute will be converted to a tab index further down // and stored in the appropriate (normal or private) window data. delete normalWin.selectedTabId; normalWin.tabs = []; // Save normal closed tabs. Forget about private closed tabs. normalWin.closedTabs = win.closedTabs.filter(tab => !tab.isPrivate); normalData.windows.push(normalWin); privateData.windows.push({ tabs: [] }); // Split the session data into private and non-private data objects. // Non-private session data will be saved to disk, and private session // data will be sent to Java for Android to hold it in memory. for (let i = 0; i < win.tabs.length; ++i) { let tab = win.tabs[i]; let savedWin = tab.isPrivate ? privateData.windows[winIndex] : normalData.windows[winIndex]; savedWin.tabs.push(tab); if (win.selectedTabId === tab.tabId) { savedWin.selected = savedWin.tabs.length; // 1-based index } } } // If we have private data, send it to Java; otherwise, send null to // indicate that there is no private data let window = Services.wm.getMostRecentWindow("navigator:browser"); if (window) { // can be null if we're restarting window.WindowEventDispatcher.sendRequest({ type: "PrivateBrowsing:Data", session: (privateData.windows.length > 0 && privateData.windows[0].tabs.length > 0) ? JSON.stringify(privateData) : null }); } // If all queued writes were for private tabs only, we can stop here. if (this._pendingWrite === this._pendingWritePrivateOnly) { this._pendingWrite = 0; this._pendingWritePrivateOnly = 0; this._lastSaveTime = Date.now(); return; } // Write only non-private data to disk if (normalData.windows[0] && normalData.windows[0].tabs) { log("_saveState() writing normal data, " + normalData.windows[0].tabs.length + " tabs in window[0]"); } else { log("_saveState() writing empty normal data"); } this._writeFile(this._sessionFile, this._sessionFileTemp, normalData, aAsync); this._lastSaveTime = Date.now(); }, _getCurrentState: function ss_getCurrentState() { this._forEachBrowserWindow((aWindow) => { this._collectWindowData(aWindow); }); let data = { windows: [] }; for (let index in this._windows) { data.windows.push(this._windows[index]); } return data; }, _collectTabData: function ss__collectTabData(aWindow, aBrowser, aHistory) { // If this browser is being restored, skip any session save activity if (aBrowser.__SS_restore) { return; } let tabData = {}; let tab = aWindow.BrowserApp.getTabForBrowser(aBrowser); tabData.entries = aHistory.entries; tabData.index = aHistory.index; tabData.attributes = { image: aBrowser.mIconURL }; tabData.desktopMode = tab.desktopMode; tabData.isPrivate = PrivateBrowsingUtils.isBrowserPrivate(aBrowser); tabData.tabId = tab.id; tabData.parentId = tab.parentId; aBrowser.__SS_data = tabData; }, _collectWindowData: function ss__collectWindowData(aWindow) { // Ignore windows not tracked by SessionStore if (!aWindow.__SSID || !this._windows[aWindow.__SSID]) { return; } let winData = this._windows[aWindow.__SSID]; winData.tabs = []; let selectedTab = aWindow.BrowserApp.selectedTab; if (selectedTab != null) { winData.selectedTabId = selectedTab.id; } let tabs = aWindow.BrowserApp.tabs; for (let i = 0; i < tabs.length; i++) { let browser = tabs[i].browser; if (browser.__SS_data) { let tabData = browser.__SS_data; if (browser.__SS_extdata) { tabData.extData = browser.__SS_extdata; } winData.tabs.push(tabData); } } }, _forEachBrowserWindow: function ss_forEachBrowserWindow(aFunc) { let windowsEnum = Services.wm.getEnumerator("navigator:browser"); while (windowsEnum.hasMoreElements()) { let window = windowsEnum.getNext(); if (window.__SSID && !window.closed) { aFunc.call(this, window); } } }, /** * Writes the session state to a disk file, while doing some telemetry and notification * bookkeeping. * @param aFile nsIFile used for saving the session * @param aFileTemp nsIFile used as a temporary file in writing the data * @param aData JSON session state * @param aAsync boolelan used to determine the method of saving the state */ _writeFile: function ss_writeFile(aFile, aFileTemp, aData, aAsync) { TelemetryStopwatch.start("FX_SESSION_RESTORE_SERIALIZE_DATA_MS"); let state = JSON.stringify(aData); TelemetryStopwatch.finish("FX_SESSION_RESTORE_SERIALIZE_DATA_MS"); // Convert data string to a utf-8 encoded array buffer let buffer = new TextEncoder().encode(state); Services.telemetry.getHistogramById("FX_SESSION_RESTORE_FILE_SIZE_BYTES").add(buffer.byteLength); Services.obs.notifyObservers(null, "sessionstore-state-write"); let startWriteMs = Cu.now(); log("_writeFile(aAsync = " + aAsync + "), _pendingWrite = " + this._pendingWrite); this._writeInProgress = true; let pendingWrite = this._pendingWrite; this._write(aFile, aFileTemp, buffer, aAsync).then(() => { let stopWriteMs = Cu.now(); // Make sure this._pendingWrite is the same value it was before we // fired off the async write. If the count is different, another write // is pending, so we shouldn't reset this._pendingWrite yet. if (pendingWrite === this._pendingWrite) { this._pendingWrite = 0; this._pendingWritePrivateOnly = 0; this._writeInProgress = false; } log("_writeFile() _write() returned, _pendingWrite = " + this._pendingWrite); // We don't use a stopwatch here since the calls are async and stopwatches can only manage // a single timer per histogram. Services.telemetry.getHistogramById("FX_SESSION_RESTORE_WRITE_FILE_MS").add(Math.round(stopWriteMs - startWriteMs)); Services.obs.notifyObservers(null, "sessionstore-state-write-complete"); EventDispatcher.instance.sendRequest({type: "Session:DataWritten"}); this._sessionDataIsGood = true; }); }, /** * Writes the session state to a disk file, using async or sync methods * @param aFile nsIFile used for saving the session * @param aFileTemp nsIFile used as a temporary file in writing the data * @param aBuffer UTF-8 encoded ArrayBuffer of the session state * @param aAsync boolelan used to determine the method of saving the state * @return Promise that resolves when the file has been written */ _write: function ss_write(aFile, aFileTemp, aBuffer, aAsync) { // Use async file writer and just return it's promise if (aAsync) { log("_write() writing asynchronously"); return OS.File.writeAtomic(aFile.path, aBuffer, { tmpPath: aFileTemp.path }); } // Convert buffer to an encoded string and sync write to disk let bytes = String.fromCharCode.apply(null, new Uint16Array(aBuffer)); let stream = Cc["@mozilla.org/network/file-output-stream;1"].createInstance(Ci.nsIFileOutputStream); stream.init(aFileTemp, 0x02 | 0x08 | 0x20, 0o666, 0); stream.write(bytes, bytes.length); stream.close(); // Mimic writeAtomic behaviour when tmpPath is set and write // to a temp file which is then renamed at the end. aFileTemp.renameTo(null, aFile.leafName); log("_write() writing synchronously"); // Return a resolved promise to make the caller happy return Promise.resolve(); }, _updateCrashReportURL: function ss_updateCrashReportURL(aWindow) { if (!AppConstants.MOZ_CRASHREPORTER) { return; } if (!aWindow.BrowserApp.selectedBrowser) { return; } try { let currentURI = aWindow.BrowserApp.selectedBrowser.currentURI; // if the current URI contains a username/password, remove it try { currentURI = currentURI.mutate() .setUserPass("") .finalize(); } catch (ex) { } // ignore failures on about: URIs Services.appinfo.annotateCrashReport("URL", currentURI.spec); } catch (ex) { // don't make noise when crashreporter is built but not enabled if (ex.result != Cr.NS_ERROR_NOT_INITIALIZED) { Cu.reportError("SessionStore:" + ex); } } }, // This function iterates through a list of urls opening a new tab for each. _openTabs: function ss_openTabs(aData) { let window = Services.wm.getMostRecentWindow("navigator:browser"); for (let i = 0; i < aData.urls.length; i++) { let url = aData.urls[i]; let selected = (i == aData.urls.length - 1); let params = { selected, delayLoad: !selected, isPrivate: false, desktopMode: false, }; window.BrowserApp.addTab(url, params); } }, // This function iterates through a list of tab data restoring session for each of them. _restoreTabs: function ss_restoreTabs(aData) { let window = Services.wm.getMostRecentWindow("navigator:browser"); for (let i = 0; i < aData.tabs.length; i++) { let tabData = JSON.parse(aData.tabs[i]); let activeSHEntry = tabData.entries[tabData.index - 1]; let selected = (i == aData.tabs.length - 1); let delayLoad = !selected; let params = { title: activeSHEntry.title, selected, delayLoad, isPrivate: tabData.isPrivate, desktopMode: tabData.desktopMode, cancelEditMode: selected, parentId: tabData.parentId }; let tab = window.BrowserApp.addTab(activeSHEntry.url, params); tab.browser.__SS_data = tabData; tab.browser.__SS_extdata = tabData.extData; if (!delayLoad) { this._restoreTab(tabData, tab.browser); } } }, /** * Starts the restoration process for a browser. History is restored at this * point, but text data must be delayed until the content loads. */ _restoreTab: function ss_restoreTab(aTabData, aBrowser) { // aTabData shouldn't be empty here, but if it is, // _restoreHistory() will crash otherwise. if (!aTabData || aTabData.entries.length == 0) { Cu.reportError("SessionStore.js: Error trying to restore tab with empty tabdata"); return; } this._restoreHistory(aBrowser.docShell, aTabData); // Various bits of state can only be restored if page loading has progressed far enough: // The MobileViewportManager needs to be told as early as possible about // our desired zoom level so it can take it into account during the // initial document resolution calculation. aBrowser.__SS_restoreDataOnLocationChange = true; // Restoring saved form data requires the input fields to be available, // so we have to wait for the content to load. aBrowser.__SS_restoreDataOnLoad = true; // Restoring the scroll position depends on the document resolution having been set, // which is only guaranteed to have happened *after* we receive the load event. aBrowser.__SS_restoreDataOnPageshow = true; }, /** * A thin wrapper around SessionHistory.jsm's restore function, which * takes serialized history data and restores it into the given * nsISessionHistory object. */ _restoreHistory: function ss_restoreHistory(aDocShell, aTabData) { let history = SessionHistory.restore(aDocShell, aTabData); // SessionHistory.jsm will have force set the active history item, // but we still need to reload it in order to finish the process. try { history.QueryInterface(Ci.nsISHistory).reloadCurrentEntry(); } catch (e) { // This will throw if the current entry is an error page. } }, /** * Takes serialized form text data and restores it into the given browser. */ _restoreTextData: function ss_restoreTextData(aFormData, aBrowser) { if (aFormData) { log("_restoreTextData()"); FormData.restoreTree(aBrowser.contentWindow, aFormData); } }, /** * Restores the zoom level of the window. This needs to be called before * first paint/load (whichever comes first) to take any effect. */ _restoreZoom: function ss_restoreZoom(aScrollData, aBrowser) { if (aScrollData && aScrollData.zoom && aScrollData.zoom.displaySize) { log("_restoreZoom(), resolution: " + aScrollData.zoom.resolution + ", old displayWidth: " + aScrollData.zoom.displaySize.width); let utils = aBrowser.contentWindow.QueryInterface( Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowUtils); // Restore zoom level. utils.setRestoreResolution(aScrollData.zoom.resolution, aScrollData.zoom.displaySize.width, aScrollData.zoom.displaySize.height); } }, /** * Takes serialized scroll positions and restores them into the given browser. */ _restoreScrollPosition: function ss_restoreScrollPosition(aScrollData, aBrowser) { if (aScrollData) { log("_restoreScrollPosition()"); ScrollPosition.restoreTree(aBrowser.contentWindow, aScrollData); } }, getBrowserState: function ss_getBrowserState() { return this._getCurrentState(); }, _restoreWindow: function ss_restoreWindow(aData) { let state; try { state = JSON.parse(aData); } catch (e) { throw "Invalid session JSON: " + aData; } // To do a restore, we must have at least one window with one tab if (!state || state.windows.length == 0 || !state.windows[0].tabs || state.windows[0].tabs.length == 0) { throw "Invalid session JSON: " + aData; } let window = Services.wm.getMostRecentWindow("navigator:browser"); let tabs = state.windows[0].tabs; for (let i = 0; i < tabs.length; i++) { let tabData = tabs[i]; // Get the stubbed tab let tab = window.BrowserApp.getTabForId(tabData.tabId); // Don't restore tab if user has already closed it if (tab == null) { delete tabData.tabId; continue; } let parentId = tabData.parentId; if (parentId > INVALID_TAB_ID) { tab.parentId = parentId; } tab.browser.__SS_data = tabData; tab.browser.__SS_extdata = tabData.extData; if (window.BrowserApp.selectedTab == tab) { // After we're done restoring, we can lift the general ban on tab data // capturing, but we still need to protect the foreground tab until we're // sure it's actually reloading after history restoring has finished. tab.browser.__SS_restoreReloadPending = true; this._restoreTab(tabData, tab.browser); this._startupRestoreFinished = true; log("startupRestoreFinished = true"); delete tab.browser.__SS_restore; tab.browser.removeAttribute("pending"); this._windows[window.__SSID].selectedTabId = tab.id; } else { // Mark the browser for delay loading tab.browser.__SS_restore = true; tab.browser.setAttribute("pending", "true"); } } // Restore the closed tabs array on the current window. if (state.windows[0].closedTabs && this._maxTabsUndo > 0) { this._windows[window.__SSID].closedTabs = state.windows[0].closedTabs; log("_restoreWindow() loaded " + state.windows[0].closedTabs.length + " closed tabs"); } }, getClosedTabCount: function ss_getClosedTabCount(aWindow) { if (!aWindow || !aWindow.__SSID || !this._windows[aWindow.__SSID]) { return 0; // not a browser window, or not otherwise tracked by SS. } return this._windows[aWindow.__SSID].closedTabs.length; }, getClosedTabs: function ss_getClosedTabs(aWindow) { if (!aWindow.__SSID) { throw (Components.returnCode = Cr.NS_ERROR_INVALID_ARG); } return this._windows[aWindow.__SSID].closedTabs; }, undoCloseTab: function ss_undoCloseTab(aWindow, aCloseTabData) { if (!aWindow.__SSID) { throw (Components.returnCode = Cr.NS_ERROR_INVALID_ARG); } let closedTabs = this._windows[aWindow.__SSID].closedTabs; if (!closedTabs) { return null; } // If the tab data is in the closedTabs array, remove it. closedTabs.find(function(tabData, i) { if (tabData == aCloseTabData) { closedTabs.splice(i, 1); return true; } }); // create a new tab and bring to front let params = { selected: true, isPrivate: aCloseTabData.isPrivate, desktopMode: aCloseTabData.desktopMode, tabIndex: this._lastClosedTabIndex, parentId: aCloseTabData.parentId }; let tab = aWindow.BrowserApp.addTab(aCloseTabData.entries[aCloseTabData.index - 1].url, params); tab.browser.__SS_data = aCloseTabData; tab.browser.__SS_extdata = aCloseTabData.extData; this._restoreTab(aCloseTabData, tab.browser); this._lastClosedTabIndex = INVALID_TAB_INDEX; if (this._notifyClosedTabs) { this._sendClosedTabsToJava(aWindow); } return tab.browser; }, forgetClosedTab: function ss_forgetClosedTab(aWindow, aIndex) { if (!aWindow.__SSID) { throw (Components.returnCode = Cr.NS_ERROR_INVALID_ARG); } let closedTabs = this._windows[aWindow.__SSID].closedTabs; // default to the most-recently closed tab aIndex = aIndex || 0; if (!(aIndex in closedTabs)) { throw (Components.returnCode = Cr.NS_ERROR_INVALID_ARG); } // remove closed tab from the array closedTabs.splice(aIndex, 1); // Forget the last closed tab index if we're forgetting the last closed tab. if (aIndex == 0) { this._lastClosedTabIndex = INVALID_TAB_INDEX; } if (this._notifyClosedTabs) { this._sendClosedTabsToJava(aWindow); } }, get canUndoLastCloseTab() { return this._lastClosedTabIndex > INVALID_TAB_INDEX; }, _sendClosedTabsToJava: function ss_sendClosedTabsToJava(aWindow) { // If the app is shutting down, we don't need to do anything. if (this._loadState <= STATE_QUITTING) { return; } if (!aWindow.__SSID) { throw (Components.returnCode = Cr.NS_ERROR_INVALID_ARG); } let closedTabs = this._windows[aWindow.__SSID].closedTabs; let isPrivate = PrivateBrowsingUtils.isBrowserPrivate(aWindow.BrowserApp.selectedBrowser); let tabs = closedTabs .filter(tab => tab.isPrivate == isPrivate) .map(function(tab) { // Get the url and title for the current entry in the session history. let entry = tab.entries[tab.index - 1]; return { url: entry.url, title: entry.title || "", data: JSON.stringify(tab), }; }); log("sending " + tabs.length + " closed tabs to Java"); EventDispatcher.instance.sendRequest({ type: "ClosedTabs:Data", tabs: tabs }); }, getTabValue: function ss_getTabValue(aTab, aKey) { let browser = aTab.browser; let data = browser.__SS_extdata || {}; return data[aKey] || ""; }, setTabValue: function ss_setTabValue(aTab, aKey, aStringValue) { let browser = aTab.browser; if (!browser.__SS_extdata) { browser.__SS_extdata = {}; } browser.__SS_extdata[aKey] = aStringValue; this.saveStateDelayed(); }, deleteTabValue: function ss_deleteTabValue(aTab, aKey) { let browser = aTab.browser; if (browser.__SS_extdata && aKey in browser.__SS_extdata) { delete browser.__SS_extdata[aKey]; this.saveStateDelayed(); } }, restoreLastSession: Task.async(function* (aSessionString) { let notifyMessage = ""; try { this._restoreWindow(aSessionString); } catch (e) { Cu.reportError("SessionStore: " + e); notifyMessage = "fail"; } Services.obs.notifyObservers(null, "sessionstore-windows-restored", notifyMessage); }), removeWindow: function ss_removeWindow(aWindow) { if (!aWindow || !aWindow.__SSID || !this._windows[aWindow.__SSID]) { return; } delete this._windows[aWindow.__SSID]; delete aWindow.__SSID; if (this._loadState == STATE_RUNNING) { // Save the purged state immediately this.saveState(); } else if (this._loadState <= STATE_QUITTING) { this.saveStateDelayed(); } }, setLoadState: function ss_setLoadState(aState) { this.flushPendingState(); this._loadState = aState; } }; this.NSGetFactory = XPCOMUtils.generateNSGetFactory([SessionStore]);