зеркало из https://github.com/mozilla/gecko-dev.git
1227 строки
41 KiB
JavaScript
1227 строки
41 KiB
JavaScript
/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
|
|
* 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";
|
|
|
|
var EXPORTED_SYMBOLS = ["AsyncTabSwitcher"];
|
|
|
|
const {XPCOMUtils} = ChromeUtils.import("resource://gre/modules/XPCOMUtils.jsm");
|
|
XPCOMUtils.defineLazyModuleGetters(this, {
|
|
AppConstants: "resource://gre/modules/AppConstants.jsm",
|
|
Services: "resource://gre/modules/Services.jsm",
|
|
});
|
|
|
|
XPCOMUtils.defineLazyPreferenceGetter(this, "gTabWarmingEnabled",
|
|
"browser.tabs.remote.warmup.enabled");
|
|
XPCOMUtils.defineLazyPreferenceGetter(this, "gTabWarmingMax",
|
|
"browser.tabs.remote.warmup.maxTabs");
|
|
XPCOMUtils.defineLazyPreferenceGetter(this, "gTabWarmingUnloadDelayMs",
|
|
"browser.tabs.remote.warmup.unloadDelayMs");
|
|
XPCOMUtils.defineLazyPreferenceGetter(this, "gTabCacheSize",
|
|
"browser.tabs.remote.tabCacheSize");
|
|
|
|
/**
|
|
* The tab switcher is responsible for asynchronously switching
|
|
* tabs in e10s. It waits until the new tab is ready (i.e., the
|
|
* layer tree is available) before switching to it. Then it
|
|
* unloads the layer tree for the old tab.
|
|
*
|
|
* The tab switcher is a state machine. For each tab, it
|
|
* maintains state about whether the layer tree for the tab is
|
|
* available, being loaded, being unloaded, or unavailable. It
|
|
* also keeps track of the tab currently being displayed, the tab
|
|
* it's trying to load, and the tab the user has asked to switch
|
|
* to. The switcher object is created upon tab switch. It is
|
|
* released when there are no pending tabs to load or unload.
|
|
*
|
|
* The following general principles have guided the design:
|
|
*
|
|
* 1. We only request one layer tree at a time. If the user
|
|
* switches to a different tab while waiting, we don't request
|
|
* the new layer tree until the old tab has loaded or timed out.
|
|
*
|
|
* 2. If loading the layers for a tab times out, we show the
|
|
* spinner and possibly request the layer tree for another tab if
|
|
* the user has requested one.
|
|
*
|
|
* 3. We discard layer trees on a delay. This way, if the user is
|
|
* switching among the same tabs frequently, we don't continually
|
|
* load the same tabs.
|
|
*
|
|
* It's important that we always show either the spinner or a tab
|
|
* whose layers are available. Otherwise the compositor will draw
|
|
* an entirely black frame, which is very jarring. To ensure this
|
|
* never happens when switching away from a tab, we assume the
|
|
* old tab might still be drawn until a MozAfterPaint event
|
|
* occurs. Because layout and compositing happen asynchronously,
|
|
* we don't have any other way of knowing when the switch
|
|
* actually takes place. Therefore, we don't unload the old tab
|
|
* until the next MozAfterPaint event.
|
|
*/
|
|
class AsyncTabSwitcher {
|
|
constructor(tabbrowser) {
|
|
this.log("START");
|
|
|
|
// How long to wait for a tab's layers to load. After this
|
|
// time elapses, we're free to put up the spinner and start
|
|
// trying to load a different tab.
|
|
this.TAB_SWITCH_TIMEOUT = 400; // ms
|
|
|
|
// When the user hasn't switched tabs for this long, we unload
|
|
// layers for all tabs that aren't in use.
|
|
this.UNLOAD_DELAY = 300; // ms
|
|
|
|
// The next three tabs form the principal state variables.
|
|
// See the assertions in postActions for their invariants.
|
|
|
|
// Tab the user requested most recently.
|
|
this.requestedTab = tabbrowser.selectedTab;
|
|
|
|
// Tab we're currently trying to load.
|
|
this.loadingTab = null;
|
|
|
|
// We show this tab in case the requestedTab hasn't loaded yet.
|
|
this.lastVisibleTab = tabbrowser.selectedTab;
|
|
|
|
// Auxilliary state variables:
|
|
|
|
this.visibleTab = tabbrowser.selectedTab; // Tab that's on screen.
|
|
this.spinnerTab = null; // Tab showing a spinner.
|
|
this.blankTab = null; // Tab showing blank.
|
|
this.lastPrimaryTab = tabbrowser.selectedTab; // Tab with primary="true"
|
|
|
|
this.tabbrowser = tabbrowser;
|
|
this.window = tabbrowser.ownerGlobal;
|
|
this.loadTimer = null; // TAB_SWITCH_TIMEOUT nsITimer instance.
|
|
this.unloadTimer = null; // UNLOAD_DELAY nsITimer instance.
|
|
|
|
// Map from tabs to STATE_* (below).
|
|
this.tabState = new Map();
|
|
|
|
// True if we're in the midst of switching tabs.
|
|
this.switchInProgress = false;
|
|
|
|
// Transaction id for the composite that will show the requested
|
|
// tab for the first tab after a tab switch.
|
|
// Set to -1 when we're not waiting for notification of a
|
|
// completed switch.
|
|
this.switchPaintId = -1;
|
|
|
|
// Set of tabs that might be visible right now. We maintain
|
|
// this set because we can't be sure when a tab is actually
|
|
// drawn. A tab is added to this set when we ask to make it
|
|
// visible. All tabs but the most recently shown tab are
|
|
// removed from the set upon MozAfterPaint.
|
|
this.maybeVisibleTabs = new Set([tabbrowser.selectedTab]);
|
|
|
|
// This holds onto the set of tabs that we've been asked to warm up,
|
|
// and tabs are evicted once they're done loading or are unloaded.
|
|
this.warmingTabs = new WeakSet();
|
|
|
|
this.STATE_UNLOADED = 0;
|
|
this.STATE_LOADING = 1;
|
|
this.STATE_LOADED = 2;
|
|
this.STATE_UNLOADING = 3;
|
|
|
|
// re-entrancy guard:
|
|
this._processing = false;
|
|
|
|
// For telemetry, keeps track of what most recently cleared
|
|
// the loadTimer, which can tell us something about the cause
|
|
// of tab switch spinners.
|
|
this._loadTimerClearedBy = "none";
|
|
|
|
this._useDumpForLogging = false;
|
|
this._logInit = false;
|
|
|
|
this.window.addEventListener("MozAfterPaint", this);
|
|
this.window.addEventListener("MozLayerTreeReady", this);
|
|
this.window.addEventListener("MozLayerTreeCleared", this);
|
|
this.window.addEventListener("TabRemotenessChange", this);
|
|
this.window.addEventListener("sizemodechange", this);
|
|
this.window.addEventListener("occlusionstatechange", this);
|
|
this.window.addEventListener("SwapDocShells", this, true);
|
|
this.window.addEventListener("EndSwapDocShells", this, true);
|
|
|
|
let initialTab = this.requestedTab;
|
|
let initialBrowser = initialTab.linkedBrowser;
|
|
|
|
let tabIsLoaded = !initialBrowser.isRemoteBrowser ||
|
|
initialBrowser.frameLoader.tabParent.hasLayers;
|
|
|
|
// If we minimized the window before the switcher was activated,
|
|
// we might have set the preserveLayers flag for the current
|
|
// browser. Let's clear it.
|
|
initialBrowser.preserveLayers(false);
|
|
|
|
if (!this.minimizedOrFullyOccluded) {
|
|
this.log("Initial tab is loaded?: " + tabIsLoaded);
|
|
this.setTabState(initialTab, tabIsLoaded ? this.STATE_LOADED
|
|
: this.STATE_LOADING);
|
|
}
|
|
|
|
for (let ppBrowser of this.tabbrowser._printPreviewBrowsers) {
|
|
let ppTab = this.tabbrowser.getTabForBrowser(ppBrowser);
|
|
let state = ppBrowser.hasLayers ? this.STATE_LOADED
|
|
: this.STATE_LOADING;
|
|
this.setTabState(ppTab, state);
|
|
}
|
|
}
|
|
|
|
destroy() {
|
|
if (this.unloadTimer) {
|
|
this.clearTimer(this.unloadTimer);
|
|
this.unloadTimer = null;
|
|
}
|
|
if (this.loadTimer) {
|
|
this.clearTimer(this.loadTimer);
|
|
this.loadTimer = null;
|
|
}
|
|
|
|
this.window.removeEventListener("MozAfterPaint", this);
|
|
this.window.removeEventListener("MozLayerTreeReady", this);
|
|
this.window.removeEventListener("MozLayerTreeCleared", this);
|
|
this.window.removeEventListener("TabRemotenessChange", this);
|
|
this.window.removeEventListener("sizemodechange", this);
|
|
this.window.removeEventListener("occlusionstatechange", this);
|
|
this.window.removeEventListener("SwapDocShells", this, true);
|
|
this.window.removeEventListener("EndSwapDocShells", this, true);
|
|
|
|
this.tabbrowser._switcher = null;
|
|
}
|
|
|
|
// Wraps nsITimer. Must not use the vanilla setTimeout and
|
|
// clearTimeout, because they will be blocked by nsIPromptService
|
|
// dialogs.
|
|
setTimer(callback, timeout) {
|
|
let event = {
|
|
notify: callback,
|
|
};
|
|
|
|
var timer = Cc["@mozilla.org/timer;1"]
|
|
.createInstance(Ci.nsITimer);
|
|
timer.initWithCallback(event, timeout, Ci.nsITimer.TYPE_ONE_SHOT);
|
|
return timer;
|
|
}
|
|
|
|
clearTimer(timer) {
|
|
timer.cancel();
|
|
}
|
|
|
|
getTabState(tab) {
|
|
let state = this.tabState.get(tab);
|
|
|
|
// As an optimization, we lazily evaluate the state of tabs
|
|
// that we've never seen before. Once we've figured it out,
|
|
// we stash it in our state map.
|
|
if (state === undefined) {
|
|
state = this.STATE_UNLOADED;
|
|
|
|
if (tab && tab.linkedPanel) {
|
|
let b = tab.linkedBrowser;
|
|
if (b.renderLayers && b.hasLayers) {
|
|
state = this.STATE_LOADED;
|
|
} else if (b.renderLayers && !b.hasLayers) {
|
|
state = this.STATE_LOADING;
|
|
} else if (!b.renderLayers && b.hasLayers) {
|
|
state = this.STATE_UNLOADING;
|
|
}
|
|
}
|
|
|
|
this.setTabStateNoAction(tab, state);
|
|
}
|
|
|
|
return state;
|
|
}
|
|
|
|
setTabStateNoAction(tab, state) {
|
|
if (state == this.STATE_UNLOADED) {
|
|
this.tabState.delete(tab);
|
|
} else {
|
|
this.tabState.set(tab, state);
|
|
}
|
|
}
|
|
|
|
setTabState(tab, state) {
|
|
if (state == this.getTabState(tab)) {
|
|
return;
|
|
}
|
|
|
|
this.setTabStateNoAction(tab, state);
|
|
|
|
let browser = tab.linkedBrowser;
|
|
let { tabParent } = browser.frameLoader;
|
|
if (state == this.STATE_LOADING) {
|
|
this.assert(!this.minimizedOrFullyOccluded);
|
|
|
|
// If we're not in the process of warming this tab, we
|
|
// don't need to delay activating its DocShell.
|
|
if (!this.warmingTabs.has(tab)) {
|
|
browser.docShellIsActive = true;
|
|
}
|
|
|
|
if (tabParent) {
|
|
browser.renderLayers = true;
|
|
} else {
|
|
this.onLayersReady(browser);
|
|
}
|
|
} else if (state == this.STATE_UNLOADING) {
|
|
this.unwarmTab(tab);
|
|
// Setting the docShell to be inactive will also cause it
|
|
// to stop rendering layers.
|
|
browser.docShellIsActive = false;
|
|
if (!tabParent) {
|
|
this.onLayersCleared(browser);
|
|
}
|
|
} else if (state == this.STATE_LOADED) {
|
|
this.maybeActivateDocShell(tab);
|
|
}
|
|
|
|
if (!tab.linkedBrowser.isRemoteBrowser) {
|
|
// setTabState is potentially re-entrant in the non-remote case,
|
|
// so we must re-get the state for this assertion.
|
|
let nonRemoteState = this.getTabState(tab);
|
|
// Non-remote tabs can never stay in the STATE_LOADING
|
|
// or STATE_UNLOADING states. By the time this function
|
|
// exits, a non-remote tab must be in STATE_LOADED or
|
|
// STATE_UNLOADED, since the painting and the layer
|
|
// upload happen synchronously.
|
|
this.assert(nonRemoteState == this.STATE_UNLOADED ||
|
|
nonRemoteState == this.STATE_LOADED);
|
|
}
|
|
}
|
|
|
|
get minimizedOrFullyOccluded() {
|
|
return this.window.windowState == this.window.STATE_MINIMIZED ||
|
|
this.window.isFullyOccluded;
|
|
}
|
|
|
|
get tabLayerCache() {
|
|
return this.tabbrowser._tabLayerCache;
|
|
}
|
|
|
|
finish() {
|
|
this.log("FINISH");
|
|
|
|
this.assert(this.tabbrowser._switcher);
|
|
this.assert(this.tabbrowser._switcher === this);
|
|
this.assert(!this.spinnerTab);
|
|
this.assert(!this.blankTab);
|
|
this.assert(!this.loadTimer);
|
|
this.assert(!this.loadingTab);
|
|
this.assert(this.lastVisibleTab === this.requestedTab);
|
|
this.assert(this.minimizedOrFullyOccluded ||
|
|
this.getTabState(this.requestedTab) == this.STATE_LOADED);
|
|
|
|
this.destroy();
|
|
|
|
this.window.document.commandDispatcher.unlock();
|
|
|
|
let event = new this.window.CustomEvent("TabSwitchDone", {
|
|
bubbles: true,
|
|
cancelable: true,
|
|
});
|
|
this.tabbrowser.dispatchEvent(event);
|
|
}
|
|
|
|
// This function is called after all the main state changes to
|
|
// make sure we display the right tab.
|
|
updateDisplay() {
|
|
let requestedTabState = this.getTabState(this.requestedTab);
|
|
let requestedBrowser = this.requestedTab.linkedBrowser;
|
|
|
|
// It is often more desirable to show a blank tab when appropriate than
|
|
// the tab switch spinner - especially since the spinner is usually
|
|
// preceded by a perceived lag of TAB_SWITCH_TIMEOUT ms in the
|
|
// tab switch. We can hide this lag, and hide the time being spent
|
|
// constructing TabChild's, layer trees, etc, by showing a blank
|
|
// tab instead and focusing it immediately.
|
|
let shouldBeBlank = false;
|
|
if (requestedBrowser.isRemoteBrowser) {
|
|
// If a tab is remote and the window is not minimized, we can show a
|
|
// blank tab instead of a spinner in the following cases:
|
|
//
|
|
// 1. The tab has just crashed, and we haven't started showing the
|
|
// tab crashed page yet (in this case, the TabParent is null)
|
|
// 2. The tab has never presented, and has not finished loading
|
|
// a non-local-about: page.
|
|
//
|
|
// For (2), "finished loading a non-local-about: page" is
|
|
// determined by the busy state on the tab element and checking
|
|
// if the loaded URI is local.
|
|
let hasSufficientlyLoaded = !this.requestedTab.hasAttribute("busy") &&
|
|
!this.tabbrowser.isLocalAboutURI(requestedBrowser.currentURI);
|
|
|
|
let fl = requestedBrowser.frameLoader;
|
|
shouldBeBlank = !this.minimizedOrFullyOccluded &&
|
|
(!fl.tabParent ||
|
|
(!hasSufficientlyLoaded && !fl.tabParent.hasPresented));
|
|
}
|
|
|
|
this.log("Tab should be blank: " + shouldBeBlank);
|
|
this.log("Requested tab is remote?: " + requestedBrowser.isRemoteBrowser);
|
|
|
|
// Figure out which tab we actually want visible right now.
|
|
let showTab = null;
|
|
if (requestedTabState != this.STATE_LOADED &&
|
|
this.lastVisibleTab && this.loadTimer && !shouldBeBlank) {
|
|
// If we can't show the requestedTab, and lastVisibleTab is
|
|
// available, show it.
|
|
showTab = this.lastVisibleTab;
|
|
} else {
|
|
// Show the requested tab. If it's not available, we'll show the spinner or a blank tab.
|
|
showTab = this.requestedTab;
|
|
}
|
|
|
|
// First, let's deal with blank tabs, which we show instead
|
|
// of the spinner when the tab is not currently set up
|
|
// properly in the content process.
|
|
if (!shouldBeBlank && this.blankTab) {
|
|
this.blankTab.linkedBrowser.removeAttribute("blank");
|
|
this.blankTab = null;
|
|
} else if (shouldBeBlank && this.blankTab !== showTab) {
|
|
if (this.blankTab) {
|
|
this.blankTab.linkedBrowser.removeAttribute("blank");
|
|
}
|
|
this.blankTab = showTab;
|
|
this.blankTab.linkedBrowser.setAttribute("blank", "true");
|
|
}
|
|
|
|
// Show or hide the spinner as needed.
|
|
let needSpinner = this.getTabState(showTab) != this.STATE_LOADED &&
|
|
!this.minimizedOrFullyOccluded &&
|
|
!shouldBeBlank;
|
|
|
|
if (!needSpinner && this.spinnerTab) {
|
|
this.spinnerHidden();
|
|
this.tabbrowser.tabpanels.removeAttribute("pendingpaint");
|
|
this.spinnerTab.linkedBrowser.removeAttribute("pendingpaint");
|
|
this.spinnerTab = null;
|
|
} else if (needSpinner && this.spinnerTab !== showTab) {
|
|
if (this.spinnerTab) {
|
|
this.spinnerTab.linkedBrowser.removeAttribute("pendingpaint");
|
|
} else {
|
|
this.spinnerDisplayed();
|
|
}
|
|
this.spinnerTab = showTab;
|
|
this.tabbrowser.tabpanels.setAttribute("pendingpaint", "true");
|
|
this.spinnerTab.linkedBrowser.setAttribute("pendingpaint", "true");
|
|
}
|
|
|
|
// Switch to the tab we've decided to make visible.
|
|
if (this.visibleTab !== showTab) {
|
|
this.tabbrowser._adjustFocusBeforeTabSwitch(this.visibleTab, showTab);
|
|
this.visibleTab = showTab;
|
|
|
|
this.maybeVisibleTabs.add(showTab);
|
|
|
|
let tabpanels = this.tabbrowser.tabpanels;
|
|
let showPanel = this.tabbrowser.tabContainer.getRelatedElement(showTab);
|
|
let index = Array.indexOf(tabpanels.children, showPanel);
|
|
if (index != -1) {
|
|
this.log(`Switch to tab ${index} - ${this.tinfo(showTab)}`);
|
|
tabpanels.setAttribute("selectedIndex", index);
|
|
if (showTab === this.requestedTab) {
|
|
if (requestedTabState == this.STATE_LOADED) {
|
|
// The new tab will be made visible in the next paint, record the expected
|
|
// transaction id for that, and we'll mark when we get notified of its
|
|
// completion.
|
|
this.switchPaintId = this.window.windowUtils.lastTransactionId + 1;
|
|
} else {
|
|
// We're making the tab visible even though we haven't yet got layers for it.
|
|
// It's hard to know which composite the layers will first be available in (and
|
|
// the parent process might not even get MozAfterPaint delivered for it), so just
|
|
// give up measuring this for now. :(
|
|
TelemetryStopwatch.cancel("FX_TAB_SWITCH_COMPOSITE_E10S_MS", this.window);
|
|
}
|
|
|
|
this.tabbrowser._adjustFocusAfterTabSwitch(showTab);
|
|
this.maybeActivateDocShell(this.requestedTab);
|
|
}
|
|
}
|
|
|
|
// This doesn't necessarily exist if we're a new window and haven't switched tabs yet
|
|
if (this.lastVisibleTab)
|
|
this.lastVisibleTab._visuallySelected = false;
|
|
|
|
this.visibleTab._visuallySelected = true;
|
|
this.tabbrowser.tabContainer._setPositionalAttributes();
|
|
}
|
|
|
|
this.lastVisibleTab = this.visibleTab;
|
|
}
|
|
|
|
assert(cond) {
|
|
if (!cond) {
|
|
dump("Assertion failure\n" + Error().stack);
|
|
|
|
// Don't break a user's browser if an assertion fails.
|
|
if (AppConstants.DEBUG) {
|
|
throw new Error("Assertion failure");
|
|
}
|
|
}
|
|
}
|
|
|
|
maybeClearLoadTimer(caller) {
|
|
if (this.loadingTab) {
|
|
this._loadTimerClearedBy = caller;
|
|
this.loadingTab = null;
|
|
if (this.loadTimer) {
|
|
this.clearTimer(this.loadTimer);
|
|
this.loadTimer = null;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
// We've decided to try to load requestedTab.
|
|
loadRequestedTab() {
|
|
this.assert(!this.loadTimer);
|
|
this.assert(!this.minimizedOrFullyOccluded);
|
|
|
|
// loadingTab can be non-null here if we timed out loading the current tab.
|
|
// In that case we just overwrite it with a different tab; it's had its chance.
|
|
this.loadingTab = this.requestedTab;
|
|
this.log("Loading tab " + this.tinfo(this.loadingTab));
|
|
|
|
this.loadTimer = this.setTimer(() => this.onLoadTimeout(), this.TAB_SWITCH_TIMEOUT);
|
|
this.setTabState(this.requestedTab, this.STATE_LOADING);
|
|
}
|
|
|
|
maybeActivateDocShell(tab) {
|
|
// If we've reached the point where the requested tab has entered
|
|
// the loaded state, but the DocShell is still not yet active, we
|
|
// should activate it.
|
|
let browser = tab.linkedBrowser;
|
|
let state = this.getTabState(tab);
|
|
let canCheckDocShellState = !browser.mDestroyed &&
|
|
(browser.docShell || browser.frameLoader.tabParent);
|
|
if (tab == this.requestedTab &&
|
|
canCheckDocShellState &&
|
|
state == this.STATE_LOADED &&
|
|
!browser.docShellIsActive &&
|
|
!this.minimizedOrFullyOccluded) {
|
|
browser.docShellIsActive = true;
|
|
this.logState("Set requested tab docshell to active and preserveLayers to false");
|
|
// If we minimized the window before the switcher was activated,
|
|
// we might have set the preserveLayers flag for the current
|
|
// browser. Let's clear it.
|
|
browser.preserveLayers(false);
|
|
}
|
|
}
|
|
|
|
// This function runs before every event. It fixes up the state
|
|
// to account for closed tabs.
|
|
preActions() {
|
|
this.assert(this.tabbrowser._switcher);
|
|
this.assert(this.tabbrowser._switcher === this);
|
|
|
|
for (let i = 0; i < this.tabLayerCache.length; i++) {
|
|
let tab = this.tabLayerCache[i];
|
|
if (!tab.linkedBrowser) {
|
|
this.tabState.delete(tab);
|
|
this.tabLayerCache.splice(i, 1);
|
|
i--;
|
|
}
|
|
}
|
|
|
|
for (let [tab ] of this.tabState) {
|
|
if (!tab.linkedBrowser) {
|
|
this.tabState.delete(tab);
|
|
this.unwarmTab(tab);
|
|
}
|
|
}
|
|
|
|
if (this.lastVisibleTab && !this.lastVisibleTab.linkedBrowser) {
|
|
this.lastVisibleTab = null;
|
|
}
|
|
if (this.lastPrimaryTab && !this.lastPrimaryTab.linkedBrowser) {
|
|
this.lastPrimaryTab = null;
|
|
}
|
|
if (this.blankTab && !this.blankTab.linkedBrowser) {
|
|
this.blankTab = null;
|
|
}
|
|
if (this.spinnerTab && !this.spinnerTab.linkedBrowser) {
|
|
this.spinnerHidden();
|
|
this.spinnerTab = null;
|
|
}
|
|
if (this.loadingTab && !this.loadingTab.linkedBrowser) {
|
|
this.maybeClearLoadTimer("preActions");
|
|
}
|
|
}
|
|
|
|
// This code runs after we've responded to an event or requested a new
|
|
// tab. It's expected that we've already updated all the principal
|
|
// state variables. This function takes care of updating any auxilliary
|
|
// state.
|
|
postActions() {
|
|
// Once we finish loading loadingTab, we null it out. So the state should
|
|
// always be LOADING.
|
|
this.assert(!this.loadingTab ||
|
|
this.getTabState(this.loadingTab) == this.STATE_LOADING);
|
|
|
|
// We guarantee that loadingTab is non-null iff loadTimer is non-null. So
|
|
// the timer is set only when we're loading something.
|
|
this.assert(!this.loadTimer || this.loadingTab);
|
|
this.assert(!this.loadingTab || this.loadTimer);
|
|
|
|
// If we're switching to a non-remote tab, there's no need to wait
|
|
// for it to send layers to the compositor, as this will happen
|
|
// synchronously. Clearing this here means that in the next step,
|
|
// we can load the non-remote browser immediately.
|
|
if (!this.requestedTab.linkedBrowser.isRemoteBrowser) {
|
|
this.maybeClearLoadTimer("postActions");
|
|
}
|
|
|
|
// If we're not loading anything, try loading the requested tab.
|
|
let stateOfRequestedTab = this.getTabState(this.requestedTab);
|
|
if (!this.loadTimer && !this.minimizedOrFullyOccluded &&
|
|
(stateOfRequestedTab == this.STATE_UNLOADED ||
|
|
stateOfRequestedTab == this.STATE_UNLOADING ||
|
|
this.warmingTabs.has(this.requestedTab))) {
|
|
this.assert(stateOfRequestedTab != this.STATE_LOADED);
|
|
this.loadRequestedTab();
|
|
}
|
|
|
|
let numBackgroundCached = 0;
|
|
for (let tab of this.tabLayerCache) {
|
|
if (tab !== this.requestedTab) {
|
|
numBackgroundCached++;
|
|
}
|
|
}
|
|
|
|
// See how many tabs still have work to do.
|
|
let numPending = 0;
|
|
let numWarming = 0;
|
|
for (let [tab, state] of this.tabState) {
|
|
// Skip print preview browsers since they shouldn't affect tab switching.
|
|
if (this.tabbrowser._printPreviewBrowsers.has(tab.linkedBrowser)) {
|
|
continue;
|
|
}
|
|
|
|
if (state == this.STATE_LOADED &&
|
|
tab !== this.requestedTab &&
|
|
!this.tabLayerCache.includes(tab)) {
|
|
numPending++;
|
|
|
|
if (tab !== this.visibleTab) {
|
|
numWarming++;
|
|
}
|
|
}
|
|
if (state == this.STATE_LOADING || state == this.STATE_UNLOADING) {
|
|
numPending++;
|
|
}
|
|
}
|
|
|
|
this.updateDisplay();
|
|
|
|
// It's possible for updateDisplay to trigger one of our own event
|
|
// handlers, which might cause finish() to already have been called.
|
|
// Check for that before calling finish() again.
|
|
if (!this.tabbrowser._switcher) {
|
|
return;
|
|
}
|
|
|
|
this.maybeFinishTabSwitch();
|
|
|
|
if (numBackgroundCached > 0) {
|
|
this.deactivateCachedBackgroundTabs();
|
|
}
|
|
|
|
if (numWarming > gTabWarmingMax) {
|
|
this.logState("Hit tabWarmingMax");
|
|
if (this.unloadTimer) {
|
|
this.clearTimer(this.unloadTimer);
|
|
}
|
|
this.unloadNonRequiredTabs();
|
|
}
|
|
|
|
if (numPending == 0) {
|
|
this.finish();
|
|
}
|
|
|
|
this.logState("done");
|
|
}
|
|
|
|
// Fires when we're ready to unload unused tabs.
|
|
onUnloadTimeout() {
|
|
this.logState("onUnloadTimeout");
|
|
this.preActions();
|
|
this.unloadTimer = null;
|
|
|
|
this.unloadNonRequiredTabs();
|
|
|
|
this.postActions();
|
|
}
|
|
|
|
deactivateCachedBackgroundTabs() {
|
|
for (let tab of this.tabLayerCache) {
|
|
if (tab !== this.requestedTab) {
|
|
let browser = tab.linkedBrowser;
|
|
browser.preserveLayers(true);
|
|
browser.docShellIsActive = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
// If there are any non-visible and non-requested tabs in
|
|
// STATE_LOADED, sets them to STATE_UNLOADING. Also queues
|
|
// up the unloadTimer to run onUnloadTimeout if there are still
|
|
// tabs in the process of unloading.
|
|
unloadNonRequiredTabs() {
|
|
this.warmingTabs = new WeakSet();
|
|
let numPending = 0;
|
|
|
|
// Unload any tabs that can be unloaded.
|
|
for (let [tab, state] of this.tabState) {
|
|
if (this.tabbrowser._printPreviewBrowsers.has(tab.linkedBrowser)) {
|
|
continue;
|
|
}
|
|
|
|
let isInLayerCache = this.tabLayerCache.includes(tab);
|
|
|
|
if (state == this.STATE_LOADED &&
|
|
!this.maybeVisibleTabs.has(tab) &&
|
|
tab !== this.lastVisibleTab &&
|
|
tab !== this.loadingTab &&
|
|
tab !== this.requestedTab &&
|
|
!isInLayerCache) {
|
|
this.setTabState(tab, this.STATE_UNLOADING);
|
|
}
|
|
|
|
if (state != this.STATE_UNLOADED &&
|
|
tab !== this.requestedTab &&
|
|
!isInLayerCache) {
|
|
numPending++;
|
|
}
|
|
}
|
|
|
|
if (numPending) {
|
|
// Keep the timer going since there may be more tabs to unload.
|
|
this.unloadTimer = this.setTimer(() => this.onUnloadTimeout(), this.UNLOAD_DELAY);
|
|
}
|
|
}
|
|
|
|
// Fires when an ongoing load has taken too long.
|
|
onLoadTimeout() {
|
|
this.logState("onLoadTimeout");
|
|
this.preActions();
|
|
this.maybeClearLoadTimer("onLoadTimeout");
|
|
this.postActions();
|
|
}
|
|
|
|
// Fires when the layers become available for a tab.
|
|
onLayersReady(browser) {
|
|
let tab = this.tabbrowser.getTabForBrowser(browser);
|
|
if (!tab) {
|
|
// We probably got a layer update from a tab that got before
|
|
// the switcher was created, or for browser that's not being
|
|
// tracked by the async tab switcher (like the preloaded about:newtab).
|
|
return;
|
|
}
|
|
|
|
this.logState(`onLayersReady(${tab._tPos}, ${browser.isRemoteBrowser})`);
|
|
|
|
this.assert(this.getTabState(tab) == this.STATE_LOADING ||
|
|
this.getTabState(tab) == this.STATE_LOADED);
|
|
this.setTabState(tab, this.STATE_LOADED);
|
|
this.unwarmTab(tab);
|
|
|
|
if (this.loadingTab === tab) {
|
|
this.maybeClearLoadTimer("onLayersReady");
|
|
}
|
|
}
|
|
|
|
// Fires when we paint the screen. Any tab switches we initiated
|
|
// previously are done, so there's no need to keep the old layers
|
|
// around.
|
|
onPaint(event) {
|
|
if (this.switchPaintId != -1 &&
|
|
event.transactionId >= this.switchPaintId) {
|
|
if (TelemetryStopwatch.running("FX_TAB_SWITCH_COMPOSITE_E10S_MS", this.window)) {
|
|
let time = TelemetryStopwatch.timeElapsed("FX_TAB_SWITCH_COMPOSITE_E10S_MS", this.window);
|
|
if (time != -1) {
|
|
TelemetryStopwatch.finish("FX_TAB_SWITCH_COMPOSITE_E10S_MS", this.window);
|
|
this.log("DEBUG: tab switch time including compositing = " + time);
|
|
}
|
|
}
|
|
this.addMarker("AsyncTabSwitch:Composited");
|
|
this.switchPaintId = -1;
|
|
}
|
|
|
|
this.maybeVisibleTabs.clear();
|
|
}
|
|
|
|
// Called when we're done clearing the layers for a tab.
|
|
onLayersCleared(browser) {
|
|
let tab = this.tabbrowser.getTabForBrowser(browser);
|
|
if (tab) {
|
|
this.logState(`onLayersCleared(${tab._tPos})`);
|
|
this.assert(this.getTabState(tab) == this.STATE_UNLOADING ||
|
|
this.getTabState(tab) == this.STATE_UNLOADED);
|
|
this.setTabState(tab, this.STATE_UNLOADED);
|
|
}
|
|
}
|
|
|
|
// Called when a tab switches from remote to non-remote. In this case
|
|
// a MozLayerTreeReady notification that we requested may never fire,
|
|
// so we need to simulate it.
|
|
onRemotenessChange(tab) {
|
|
this.logState(`onRemotenessChange(${tab._tPos}, ${tab.linkedBrowser.isRemoteBrowser})`);
|
|
if (!tab.linkedBrowser.isRemoteBrowser) {
|
|
if (this.getTabState(tab) == this.STATE_LOADING) {
|
|
this.onLayersReady(tab.linkedBrowser);
|
|
} else if (this.getTabState(tab) == this.STATE_UNLOADING) {
|
|
this.onLayersCleared(tab.linkedBrowser);
|
|
}
|
|
} else if (this.getTabState(tab) == this.STATE_LOADED) {
|
|
// A tab just changed from non-remote to remote, which means
|
|
// that it's gone back into the STATE_LOADING state until
|
|
// it sends up a layer tree.
|
|
this.setTabState(tab, this.STATE_LOADING);
|
|
}
|
|
}
|
|
|
|
// Called when a tab has been removed, and the browser node is
|
|
// about to be removed from the DOM.
|
|
onTabRemoved(tab) {
|
|
if (this.lastVisibleTab == tab) {
|
|
// The browser that was being presented to the user is
|
|
// going to be removed during this tick of the event loop.
|
|
// This will cause us to show a tab spinner instead.
|
|
this.preActions();
|
|
this.lastVisibleTab = null;
|
|
this.postActions();
|
|
}
|
|
}
|
|
|
|
onSizeModeOrOcclusionStateChange() {
|
|
if (this.minimizedOrFullyOccluded) {
|
|
for (let [tab, state] of this.tabState) {
|
|
// Skip print preview browsers since they shouldn't affect tab switching.
|
|
if (this.tabbrowser._printPreviewBrowsers.has(tab.linkedBrowser)) {
|
|
continue;
|
|
}
|
|
|
|
if (state == this.STATE_LOADING || state == this.STATE_LOADED) {
|
|
this.setTabState(tab, this.STATE_UNLOADING);
|
|
}
|
|
}
|
|
this.maybeClearLoadTimer("onSizeModeOrOcc");
|
|
} else {
|
|
// We're no longer minimized or occluded. This means we might want
|
|
// to activate the current tab's docShell.
|
|
this.maybeActivateDocShell(this.tabbrowser.selectedTab);
|
|
}
|
|
}
|
|
|
|
onSwapDocShells(ourBrowser, otherBrowser) {
|
|
// This event fires before the swap. ourBrowser is from
|
|
// our window. We save the state of otherBrowser since ourBrowser
|
|
// needs to take on that state at the end of the swap.
|
|
|
|
let otherTabbrowser = otherBrowser.ownerGlobal.gBrowser;
|
|
let otherState;
|
|
if (otherTabbrowser && otherTabbrowser._switcher) {
|
|
let otherTab = otherTabbrowser.getTabForBrowser(otherBrowser);
|
|
let otherSwitcher = otherTabbrowser._switcher;
|
|
otherState = otherSwitcher.getTabState(otherTab);
|
|
} else {
|
|
otherState = otherBrowser.docShellIsActive ? this.STATE_LOADED : this.STATE_UNLOADED;
|
|
}
|
|
if (!this.swapMap) {
|
|
this.swapMap = new WeakMap();
|
|
}
|
|
this.swapMap.set(otherBrowser, {
|
|
state: otherState,
|
|
});
|
|
}
|
|
|
|
onEndSwapDocShells(ourBrowser, otherBrowser) {
|
|
// The swap has happened. We reset the loadingTab in
|
|
// case it has been swapped. We also set ourBrowser's state
|
|
// to whatever otherBrowser's state was before the swap.
|
|
|
|
// Clearing the load timer means that we will
|
|
// immediately display a spinner if ourBrowser isn't
|
|
// ready yet. Typically it will already be ready
|
|
// though. If it's not, we're probably in a new window,
|
|
// in which case we have no other tabs to display anyway.
|
|
this.maybeClearLoadTimer("onEndSwapDocShells");
|
|
|
|
let { state: otherState } = this.swapMap.get(otherBrowser);
|
|
|
|
this.swapMap.delete(otherBrowser);
|
|
|
|
let ourTab = this.tabbrowser.getTabForBrowser(ourBrowser);
|
|
if (ourTab) {
|
|
this.setTabStateNoAction(ourTab, otherState);
|
|
}
|
|
}
|
|
|
|
shouldActivateDocShell(browser) {
|
|
let tab = this.tabbrowser.getTabForBrowser(browser);
|
|
let state = this.getTabState(tab);
|
|
return state == this.STATE_LOADING || state == this.STATE_LOADED;
|
|
}
|
|
|
|
activateBrowserForPrintPreview(browser) {
|
|
let tab = this.tabbrowser.getTabForBrowser(browser);
|
|
let state = this.getTabState(tab);
|
|
if (state != this.STATE_LOADING &&
|
|
state != this.STATE_LOADED) {
|
|
this.setTabState(tab, this.STATE_LOADING);
|
|
this.logState("Activated browser " + this.tinfo(tab) + " for print preview");
|
|
}
|
|
}
|
|
|
|
canWarmTab(tab) {
|
|
if (!gTabWarmingEnabled) {
|
|
return false;
|
|
}
|
|
|
|
if (!tab) {
|
|
return false;
|
|
}
|
|
|
|
// If the tab is not yet inserted, closing, not remote,
|
|
// crashed, already visible, or already requested, warming
|
|
// up the tab makes no sense.
|
|
if (this.minimizedOrFullyOccluded ||
|
|
!tab.linkedPanel ||
|
|
tab.closing ||
|
|
!tab.linkedBrowser.isRemoteBrowser ||
|
|
!tab.linkedBrowser.frameLoader.tabParent) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
shouldWarmTab(tab) {
|
|
if (this.canWarmTab(tab)) {
|
|
// Tabs that are already in STATE_LOADING or STATE_LOADED
|
|
// have no need to be warmed up.
|
|
let state = this.getTabState(tab);
|
|
if (state === this.STATE_UNLOADING ||
|
|
state === this.STATE_UNLOADED) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
unwarmTab(tab) {
|
|
this.warmingTabs.delete(tab);
|
|
}
|
|
|
|
warmupTab(tab) {
|
|
if (!this.shouldWarmTab(tab)) {
|
|
return;
|
|
}
|
|
|
|
this.logState("warmupTab " + this.tinfo(tab));
|
|
|
|
this.warmingTabs.add(tab);
|
|
this.setTabState(tab, this.STATE_LOADING);
|
|
this.queueUnload(gTabWarmingUnloadDelayMs);
|
|
}
|
|
|
|
cleanUpTabAfterEviction(tab) {
|
|
this.assert(tab !== this.requestedTab);
|
|
let browser = tab.linkedBrowser;
|
|
if (browser) {
|
|
browser.preserveLayers(false);
|
|
}
|
|
this.setTabState(tab, this.STATE_UNLOADING);
|
|
}
|
|
|
|
evictOldestTabFromCache() {
|
|
let tab = this.tabLayerCache.shift();
|
|
this.cleanUpTabAfterEviction(tab);
|
|
}
|
|
|
|
maybePromoteTabInLayerCache(tab) {
|
|
if (gTabCacheSize > 1 &&
|
|
tab.linkedBrowser.isRemoteBrowser &&
|
|
tab.linkedBrowser.currentURI.spec != "about:blank") {
|
|
let tabIndex = this.tabLayerCache.indexOf(tab);
|
|
|
|
if (tabIndex != -1) {
|
|
this.tabLayerCache.splice(tabIndex, 1);
|
|
}
|
|
|
|
this.tabLayerCache.push(tab);
|
|
|
|
if (this.tabLayerCache.length > gTabCacheSize) {
|
|
this.evictOldestTabFromCache();
|
|
}
|
|
}
|
|
}
|
|
|
|
// Called when the user asks to switch to a given tab.
|
|
requestTab(tab) {
|
|
if (tab === this.requestedTab) {
|
|
return;
|
|
}
|
|
|
|
let tabState = this.getTabState(tab);
|
|
if (gTabWarmingEnabled) {
|
|
let warmingState = "disqualified";
|
|
|
|
if (this.canWarmTab(tab)) {
|
|
if (tabState == this.STATE_LOADING) {
|
|
warmingState = "stillLoading";
|
|
} else if (tabState == this.STATE_LOADED) {
|
|
warmingState = "loaded";
|
|
} else if (tabState == this.STATE_UNLOADING ||
|
|
tabState == this.STATE_UNLOADED) {
|
|
// At this point, if the tab's browser was being inserted
|
|
// lazily, we never had a chance to warm it up, and unfortunately
|
|
// there's no great way to detect that case. Those cases will
|
|
// end up in the "notWarmed" bucket, along with legitimate cases
|
|
// where tabs could have been warmed but weren't.
|
|
warmingState = "notWarmed";
|
|
}
|
|
}
|
|
|
|
Services.telemetry
|
|
.getHistogramById("FX_TAB_SWITCH_REQUEST_TAB_WARMING_STATE")
|
|
.add(warmingState);
|
|
}
|
|
|
|
this.logState("requestTab " + this.tinfo(tab));
|
|
this.startTabSwitch();
|
|
|
|
let oldBrowser = this.requestedTab.linkedBrowser;
|
|
oldBrowser.deprioritize();
|
|
this.requestedTab = tab;
|
|
if (tabState == this.STATE_LOADED) {
|
|
this.maybeVisibleTabs.clear();
|
|
if (tab.linkedBrowser.isRemoteBrowser) {
|
|
tab.linkedBrowser.forceRepaint();
|
|
}
|
|
}
|
|
|
|
tab.linkedBrowser.setAttribute("primary", "true");
|
|
if (this.lastPrimaryTab && this.lastPrimaryTab != tab) {
|
|
this.lastPrimaryTab.linkedBrowser.removeAttribute("primary");
|
|
}
|
|
this.lastPrimaryTab = tab;
|
|
|
|
this.queueUnload(this.UNLOAD_DELAY);
|
|
}
|
|
|
|
queueUnload(unloadTimeout) {
|
|
this.preActions();
|
|
|
|
if (this.unloadTimer) {
|
|
this.clearTimer(this.unloadTimer);
|
|
}
|
|
this.unloadTimer = this.setTimer(() => this.onUnloadTimeout(), unloadTimeout);
|
|
|
|
this.postActions();
|
|
}
|
|
|
|
handleEvent(event, delayed = false) {
|
|
if (this._processing) {
|
|
this.setTimer(() => this.handleEvent(event, true), 0);
|
|
return;
|
|
}
|
|
if (delayed && this.tabbrowser._switcher != this) {
|
|
// if we delayed processing this event, we might be out of date, in which
|
|
// case we drop the delayed events
|
|
return;
|
|
}
|
|
this._processing = true;
|
|
this.preActions();
|
|
|
|
switch (event.type) {
|
|
case "MozLayerTreeReady":
|
|
this.onLayersReady(event.originalTarget);
|
|
break;
|
|
case "MozAfterPaint":
|
|
this.onPaint(event);
|
|
break;
|
|
case "MozLayerTreeCleared":
|
|
this.onLayersCleared(event.originalTarget);
|
|
break;
|
|
case "TabRemotenessChange":
|
|
this.onRemotenessChange(event.target);
|
|
break;
|
|
case "sizemodechange":
|
|
case "occlusionstatechange":
|
|
this.onSizeModeOrOcclusionStateChange();
|
|
break;
|
|
case "SwapDocShells":
|
|
this.onSwapDocShells(event.originalTarget, event.detail);
|
|
break;
|
|
case "EndSwapDocShells":
|
|
this.onEndSwapDocShells(event.originalTarget, event.detail);
|
|
break;
|
|
}
|
|
|
|
this.postActions();
|
|
this._processing = false;
|
|
}
|
|
|
|
/*
|
|
* Telemetry and Profiler related helpers for recording tab switch
|
|
* timing.
|
|
*/
|
|
|
|
startTabSwitch() {
|
|
TelemetryStopwatch.cancel("FX_TAB_SWITCH_TOTAL_E10S_MS", this.window);
|
|
TelemetryStopwatch.start("FX_TAB_SWITCH_TOTAL_E10S_MS", this.window);
|
|
|
|
if (TelemetryStopwatch.running("FX_TAB_SWITCH_COMPOSITE_E10S_MS", this.window)) {
|
|
TelemetryStopwatch.cancel("FX_TAB_SWITCH_COMPOSITE_E10S_MS", this.window);
|
|
}
|
|
TelemetryStopwatch.start("FX_TAB_SWITCH_COMPOSITE_E10S_MS", this.window);
|
|
this.addMarker("AsyncTabSwitch:Start");
|
|
this.switchInProgress = true;
|
|
}
|
|
|
|
/**
|
|
* Something has occurred that might mean that we've completed
|
|
* the tab switch (layers are ready, paints are done, spinners
|
|
* are hidden). This checks to make sure all conditions are
|
|
* satisfied, and then records the tab switch as finished.
|
|
*/
|
|
maybeFinishTabSwitch() {
|
|
if (this.switchInProgress && this.requestedTab &&
|
|
(this.getTabState(this.requestedTab) == this.STATE_LOADED ||
|
|
this.requestedTab === this.blankTab)) {
|
|
if (this.requestedTab !== this.blankTab) {
|
|
this.maybePromoteTabInLayerCache(this.requestedTab);
|
|
}
|
|
|
|
// After this point the tab has switched from the content thread's point of view.
|
|
// The changes will be visible after the next refresh driver tick + composite.
|
|
let time = TelemetryStopwatch.timeElapsed("FX_TAB_SWITCH_TOTAL_E10S_MS", this.window);
|
|
if (time != -1) {
|
|
TelemetryStopwatch.finish("FX_TAB_SWITCH_TOTAL_E10S_MS", this.window);
|
|
this.log("DEBUG: tab switch time = " + time);
|
|
this.addMarker("AsyncTabSwitch:Finish");
|
|
}
|
|
this.switchInProgress = false;
|
|
}
|
|
}
|
|
|
|
spinnerDisplayed() {
|
|
this.assert(!this.spinnerTab);
|
|
let browser = this.requestedTab.linkedBrowser;
|
|
this.assert(browser.isRemoteBrowser);
|
|
TelemetryStopwatch.start("FX_TAB_SWITCH_SPINNER_VISIBLE_MS", this.window);
|
|
// We have a second, similar probe for capturing recordings of
|
|
// when the spinner is displayed for very long periods.
|
|
TelemetryStopwatch.start("FX_TAB_SWITCH_SPINNER_VISIBLE_LONG_MS", this.window);
|
|
this.addMarker("AsyncTabSwitch:SpinnerShown");
|
|
Services.telemetry
|
|
.getHistogramById("FX_TAB_SWITCH_SPINNER_VISIBLE_TRIGGER")
|
|
.add(this._loadTimerClearedBy);
|
|
if (AppConstants.NIGHTLY_BUILD) {
|
|
Services.obs.notifyObservers(null, "tabswitch-spinner");
|
|
}
|
|
}
|
|
|
|
spinnerHidden() {
|
|
this.assert(this.spinnerTab);
|
|
this.log("DEBUG: spinner time = " +
|
|
TelemetryStopwatch.timeElapsed("FX_TAB_SWITCH_SPINNER_VISIBLE_MS", this.window));
|
|
TelemetryStopwatch.finish("FX_TAB_SWITCH_SPINNER_VISIBLE_MS", this.window);
|
|
TelemetryStopwatch.finish("FX_TAB_SWITCH_SPINNER_VISIBLE_LONG_MS", this.window);
|
|
this.addMarker("AsyncTabSwitch:SpinnerHidden");
|
|
// we do not get a onPaint after displaying the spinner
|
|
this._loadTimerClearedBy = "none";
|
|
}
|
|
|
|
addMarker(marker) {
|
|
if (Services.profiler) {
|
|
Services.profiler.AddMarker(marker);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Debug related logging for switcher.
|
|
*/
|
|
logging() {
|
|
if (this._useDumpForLogging)
|
|
return true;
|
|
if (this._logInit)
|
|
return this._shouldLog;
|
|
let result = Services.prefs.getBoolPref("browser.tabs.remote.logSwitchTiming", false);
|
|
this._shouldLog = result;
|
|
this._logInit = true;
|
|
return this._shouldLog;
|
|
}
|
|
|
|
tinfo(tab) {
|
|
if (tab) {
|
|
return tab._tPos + "(" + tab.linkedBrowser.currentURI.spec + ")";
|
|
}
|
|
return "null";
|
|
}
|
|
|
|
log(s) {
|
|
if (!this.logging())
|
|
return;
|
|
if (this._useDumpForLogging) {
|
|
dump(s + "\n");
|
|
} else {
|
|
Services.console.logStringMessage(s);
|
|
}
|
|
}
|
|
|
|
logState(prefix) {
|
|
if (!this.logging())
|
|
return;
|
|
|
|
let accum = prefix + " ";
|
|
for (let i = 0; i < this.tabbrowser.tabs.length; i++) {
|
|
let tab = this.tabbrowser.tabs[i];
|
|
let state = this.getTabState(tab);
|
|
let isWarming = this.warmingTabs.has(tab);
|
|
let isCached = this.tabLayerCache.includes(tab);
|
|
let isClosing = tab.closing;
|
|
let linkedBrowser = tab.linkedBrowser;
|
|
let isActive = linkedBrowser && linkedBrowser.docShellIsActive;
|
|
let isRendered = linkedBrowser && linkedBrowser.renderLayers;
|
|
|
|
accum += i + ":";
|
|
if (tab === this.lastVisibleTab) accum += "V";
|
|
if (tab === this.loadingTab) accum += "L";
|
|
if (tab === this.requestedTab) accum += "R";
|
|
if (tab === this.blankTab) accum += "B";
|
|
|
|
let extraStates = "";
|
|
if (isWarming) extraStates += "W";
|
|
if (isCached) extraStates += "C";
|
|
if (isClosing) extraStates += "X";
|
|
if (isActive) extraStates += "A";
|
|
if (isRendered) extraStates += "R";
|
|
if (extraStates != "") {
|
|
accum += `(${extraStates})`;
|
|
}
|
|
|
|
if (state == this.STATE_LOADED) accum += "(+)";
|
|
if (state == this.STATE_LOADING) accum += "(+?)";
|
|
if (state == this.STATE_UNLOADED) accum += "(-)";
|
|
if (state == this.STATE_UNLOADING) accum += "(-?)";
|
|
accum += " ";
|
|
}
|
|
|
|
accum += "cached: " + this.tabLayerCache.length;
|
|
|
|
if (this._useDumpForLogging) {
|
|
dump(accum + "\n");
|
|
} else {
|
|
Services.console.logStringMessage(accum);
|
|
}
|
|
}
|
|
}
|
|
|