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Diffstat (limited to 'devtools/server/actors/targets/window-global.js')
| -rw-r--r-- | devtools/server/actors/targets/window-global.js | 1935 |
1 files changed, 1935 insertions, 0 deletions
diff --git a/devtools/server/actors/targets/window-global.js b/devtools/server/actors/targets/window-global.js new file mode 100644 index 0000000000..5d2bb10164 --- /dev/null +++ b/devtools/server/actors/targets/window-global.js @@ -0,0 +1,1935 @@ +/* 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"; + +// protocol.js uses objects as exceptions in order to define +// error packets. +/* eslint-disable no-throw-literal */ + +/* + * WindowGlobalTargetActor is an abstract class used by target actors that hold + * documents, such as frames, chrome windows, etc. + * + * This class is extended by ParentProcessTargetActor, itself being extented by WebExtensionTargetActor. + * + * See devtools/docs/backend/actor-hierarchy.md for more details. + * + * For performance matters, this file should only be loaded in the targeted context's + * process. For example, it shouldn't be evaluated in the parent process until we try to + * debug a document living in the parent process. + */ + +var { + ActorRegistry, +} = require("resource://devtools/server/actors/utils/actor-registry.js"); +var DevToolsUtils = require("resource://devtools/shared/DevToolsUtils.js"); +var { assert } = DevToolsUtils; +var { + SourcesManager, +} = require("resource://devtools/server/actors/utils/sources-manager.js"); +var makeDebugger = require("resource://devtools/server/actors/utils/make-debugger.js"); +const Targets = require("resource://devtools/server/actors/targets/index.js"); +const { TargetActorRegistry } = ChromeUtils.importESModule( + "resource://devtools/server/actors/targets/target-actor-registry.sys.mjs", + { + loadInDevToolsLoader: false, + } +); +const { PrivateBrowsingUtils } = ChromeUtils.importESModule( + "resource://gre/modules/PrivateBrowsingUtils.sys.mjs" +); + +const EXTENSION_CONTENT_SYS_MJS = + "resource://gre/modules/ExtensionContent.sys.mjs"; + +const { Pool } = require("resource://devtools/shared/protocol.js"); +const { + LazyPool, + createExtraActors, +} = require("resource://devtools/shared/protocol/lazy-pool.js"); +const { + windowGlobalTargetSpec, +} = require("resource://devtools/shared/specs/targets/window-global.js"); +const Resources = require("resource://devtools/server/actors/resources/index.js"); +const { + BaseTargetActor, +} = require("resource://devtools/server/actors/targets/base-target-actor.js"); + +loader.lazyRequireGetter( + this, + ["ThreadActor", "unwrapDebuggerObjectGlobal"], + "resource://devtools/server/actors/thread.js", + true +); +loader.lazyRequireGetter( + this, + "WorkerDescriptorActorList", + "resource://devtools/server/actors/worker/worker-descriptor-actor-list.js", + true +); +loader.lazyRequireGetter( + this, + "StyleSheetsManager", + "resource://devtools/server/actors/utils/stylesheets-manager.js", + true +); +const lazy = {}; +loader.lazyGetter(lazy, "ExtensionContent", () => { + return ChromeUtils.importESModule(EXTENSION_CONTENT_SYS_MJS, { + // ExtensionContent.sys.mjs is a singleton and must be loaded through the + // main loader. Note that the user of lazy.ExtensionContent elsewhere in + // this file (at webextensionsContentScriptGlobals) looks up the module + // via Cu.isESModuleLoaded, which also uses the main loader as desired. + loadInDevToolsLoader: false, + }).ExtensionContent; +}); + +loader.lazyRequireGetter( + this, + "TouchSimulator", + "resource://devtools/server/actors/emulation/touch-simulator.js", + true +); + +function getWindowID(window) { + return window.windowGlobalChild.innerWindowId; +} + +function getDocShellChromeEventHandler(docShell) { + let handler = docShell.chromeEventHandler; + if (!handler) { + try { + // Toplevel xul window's docshell doesn't have chromeEventHandler + // attribute. The chrome event handler is just the global window object. + handler = docShell.domWindow; + } catch (e) { + // ignore + } + } + return handler; +} + +/** + * Helper to retrieve all children docshells of a given docshell. + * + * Given that docshell interfaces can only be used within the same process, + * this only returns docshells for children documents that runs in the same process + * as the given docshell. + */ +function getChildDocShells(parentDocShell) { + return parentDocShell.browsingContext + .getAllBrowsingContextsInSubtree() + .filter(browsingContext => { + // Filter out browsingContext which don't expose any docshell (e.g. remote frame) + return browsingContext.docShell; + }) + .map(browsingContext => { + // Map BrowsingContext to DocShell + return browsingContext.docShell; + }); +} + +exports.getChildDocShells = getChildDocShells; + +/** + * Browser-specific actors. + */ + +function getInnerId(window) { + return window.windowGlobalChild.innerWindowId; +} + +class WindowGlobalTargetActor extends BaseTargetActor { + /** + * WindowGlobalTargetActor is the target actor to debug (HTML) documents. + * + * WindowGlobal's are the Gecko representation for a given document's window object. + * It relates to a given nsGlobalWindowInner instance. + * + * The main goal of this class is to expose the target-scoped actors being registered + * via `ActorRegistry.registerModule` and manage their lifetimes. In addition, this + * class also tracks the lifetime of the targeted window global. + * + * ### Main requests: + * + * `detach`: + * Stop document watching and cleanup everything that the target and its children actors created. + * It ultimately lead to destroy the target actor. + * `switchToFrame`: + * Change the targeted document of the whole actor, and its child target-scoped actors + * to an iframe or back to its original document. + * + * Most properties (like `chromeEventHandler` or `docShells`) are meant to be + * used by the various child target actors. + * + * ### RDP events: + * + * - `tabNavigated`: + * Sent when the window global is about to navigate or has just navigated + * to a different document. + * This event contains the following attributes: + * * url (string) + * The new URI being loaded. + * * state (string) + * `start` if we just start requesting the new URL + * `stop` if the new URL is done loading + * * isFrameSwitching (boolean) + * Indicates the event is dispatched when switching the actor context to a + * different frame. When we switch to an iframe, there is no document + * load. The targeted document is most likely going to be already done + * loading. + * * title (string) + * The document title being loaded. (sent only on state=stop) + * + * - `frameUpdate`: + * Sent when there was a change in the child frames contained in the document + * or when the actor's context was switched to another frame. + * This event can have four different forms depending on the type of change: + * * One or many frames are updated: + * { frames: [{ id, url, title, parentID }, ...] } + * * One frame got destroyed: + * { frames: [{ id, destroy: true }]} + * * All frames got destroyed: + * { destroyAll: true } + * * We switched the context of the actor to a specific frame: + * { selected: #id } + * + * ### Internal, non-rdp events: + * + * Various events are also dispatched on the actor itself without being sent to + * the client. They all relate to the documents tracked by this target actor + * (its main targeted document, but also any of its iframes): + * - will-navigate + * This event fires once navigation starts. All pending user prompts are + * dealt with, but it is fired before the first request starts. + * - navigate + * This event is fired once the document's readyState is "complete". + * - window-ready + * This event is fired in various distinct scenarios: + * * When a new Window object is crafted, equivalent of `DOMWindowCreated`. + * It is dispatched before any page script is executed. + * * We will have already received a window-ready event for this window + * when it was created, but we received a window-destroyed event when + * it was frozen into the bfcache, and now the user navigated back to + * this page, so it's now live again and we should resume handling it. + * * For each existing document, when an `attach` request is received. + * At this point scripts in the page will be already loaded. + * * When `swapFrameLoaders` is used, such as with moving window globals + * between windows or toggling Responsive Design Mode. + * - window-destroyed + * This event is fired in two cases: + * * When the window object is destroyed, i.e. when the related document + * is garbage collected. This can happen when the window global is + * closed or the iframe is removed from the DOM. + * It is equivalent of `inner-window-destroyed` event. + * * When the page goes into the bfcache and gets frozen. + * The equivalent of `pagehide`. + * - changed-toplevel-document + * This event fires when we switch the actor's targeted document + * to one of its iframes, or back to its original top document. + * It is dispatched between window-destroyed and window-ready. + * + * Note that *all* these events are dispatched in the following order + * when we switch the context of the actor to a given iframe: + * - will-navigate + * - window-destroyed + * - changed-toplevel-document + * - window-ready + * - navigate + * + * This class is subclassed by ParentProcessTargetActor and others. + * Subclasses are expected to implement a getter for the docShell property. + * + * @param conn DevToolsServerConnection + * The conection to the client. + * @param options Object + * Object with following attributes: + * - docShell nsIDocShell + * The |docShell| for the debugged frame. + * - followWindowGlobalLifeCycle Boolean + * If true, the target actor will only inspect the current WindowGlobal (and its children windows). + * But won't inspect next document loaded in the same BrowsingContext. + * The actor will behave more like a WindowGlobalTarget rather than a BrowsingContextTarget. + * This is always true for Tab debugging, but not yet for parent process/web extension. + * - isTopLevelTarget Boolean + * Should be set to true for all top-level targets. A top level target + * is the topmost target of a DevTools "session". For instance for a local + * tab toolbox, the WindowGlobalTargetActor for the content page is the top level target. + * For the Multiprocess Browser Toolbox, the parent process target is the top level + * target. + * At the moment this only impacts the WindowGlobalTarget `reconfigure` + * implementation. But for server-side target switching this flag will be exposed + * to the client and should be available for all target actor classes. It will be + * used to detect target switching. (Bug 1644397) + * - ignoreSubFrames Boolean + * If true, the actor will only focus on the passed docShell and not on the whole + * docShell tree. This should be enabled when we have targets for all documents. + * - sessionContext Object + * The Session Context to help know what is debugged. + * See devtools/server/actors/watcher/session-context.js + */ + constructor( + conn, + { + docShell, + followWindowGlobalLifeCycle, + isTopLevelTarget, + ignoreSubFrames, + sessionContext, + customSpec = windowGlobalTargetSpec, + } + ) { + super(conn, Targets.TYPES.FRAME, customSpec); + + this.followWindowGlobalLifeCycle = followWindowGlobalLifeCycle; + this.isTopLevelTarget = !!isTopLevelTarget; + this.ignoreSubFrames = ignoreSubFrames; + this.sessionContext = sessionContext; + + // A map of actor names to actor instances provided by extensions. + this._extraActors = {}; + this._sourcesManager = null; + + this._shouldAddNewGlobalAsDebuggee = + this._shouldAddNewGlobalAsDebuggee.bind(this); + + this.makeDebugger = makeDebugger.bind(null, { + findDebuggees: () => { + const result = []; + const inspectUAWidgets = Services.prefs.getBoolPref( + "devtools.inspector.showAllAnonymousContent", + false + ); + for (const win of this.windows) { + result.push(win); + // Only expose User Agent internal (like <video controls>) when the + // related pref is set. + if (inspectUAWidgets) { + const principal = win.document.nodePrincipal; + // We don't use UA widgets for the system principal. + if (!principal.isSystemPrincipal) { + result.push(Cu.getUAWidgetScope(principal)); + } + } + } + return result.concat(this.webextensionsContentScriptGlobals); + }, + shouldAddNewGlobalAsDebuggee: this._shouldAddNewGlobalAsDebuggee, + }); + + // Flag eventually overloaded by sub classes in order to watch new docshells + // Used by the ParentProcessTargetActor to list all frames in the Browser Toolbox + this.watchNewDocShells = false; + + this._workerDescriptorActorList = null; + this._workerDescriptorActorPool = null; + this._onWorkerDescriptorActorListChanged = + this._onWorkerDescriptorActorListChanged.bind(this); + + this._onConsoleApiProfilerEvent = + this._onConsoleApiProfilerEvent.bind(this); + Services.obs.addObserver( + this._onConsoleApiProfilerEvent, + "console-api-profiler" + ); + + // Start observing navigations as well as sub documents. + // (This is probably meant to disappear once EFT is the only supported codepath) + this._progressListener = new DebuggerProgressListener(this); + + TargetActorRegistry.registerTargetActor(this); + + if (docShell) { + this.setDocShell(docShell); + } + } + + /** + * Define the initial docshell. + * + * This is called from the constructor for WindowGlobalTargetActor, + * or from sub class constructors: WebExtensionTargetActor and ParentProcessTargetActor. + * + * This is to circumvent the fact that sub classes need to call inner method + * to compute the initial docshell and we can't call inner methods before calling + * the base class constructor... + */ + setDocShell(docShell) { + Object.defineProperty(this, "docShell", { + value: docShell, + configurable: true, + writable: true, + }); + + // Save references to the original document we attached to + this._originalWindow = this.window; + + // Update isPrivate as window is based on docShell + this.isPrivate = PrivateBrowsingUtils.isContentWindowPrivate(this.window); + + // Instantiate the Thread Actor immediately. + // This is the only one actor instantiated right away by the target actor. + // All the others are instantiated lazily on first request made the client, + // via LazyPool API. + this._createThreadActor(); + + // Ensure notifying about the target actor first + // before notifying about new docshells. + // Otherwise we would miss these RDP event as the client hasn't + // yet received the target actor's form. + // (This is also probably meant to disappear once EFT is the only supported codepath) + this._docShellsObserved = false; + DevToolsUtils.executeSoon(() => this._watchDocshells()); + } + + get docShell() { + throw new Error( + "A docShell should be provided as constructor argument of WindowGlobalTargetActor, or redefined by the subclass" + ); + } + + // Optional console API listener options (e.g. used by the WebExtensionActor to + // filter console messages by addonID), set to an empty (no options) object by default. + consoleAPIListenerOptions = {}; + + /* + * Return a Debugger instance or create one if there is none yet + */ + get dbg() { + if (!this._dbg) { + this._dbg = this.makeDebugger(); + } + return this._dbg; + } + + /** + * Try to locate the console actor if it exists. + */ + get _consoleActor() { + if (this.isDestroyed()) { + return null; + } + const form = this.form(); + return this.conn._getOrCreateActor(form.consoleActor); + } + + get _memoryActor() { + if (this.isDestroyed()) { + return null; + } + const form = this.form(); + return this.conn._getOrCreateActor(form.memoryActor); + } + + _targetScopedActorPool = null; + + /** + * An object on which listen for DOMWindowCreated and pageshow events. + */ + get chromeEventHandler() { + return getDocShellChromeEventHandler(this.docShell); + } + + /** + * Getter for the nsIMessageManager associated to the window global. + */ + get messageManager() { + try { + return this.docShell.messageManager; + } catch (e) { + // In some cases we can't get a docshell. We just have no message manager + // then, + return null; + } + } + + /** + * Getter for the list of all `docShell`s in the window global. + * @return {Array} + */ + get docShells() { + if (this.ignoreSubFrames) { + return [this.docShell]; + } + + return getChildDocShells(this.docShell); + } + + /** + * Getter for the window global's current DOM window. + */ + get window() { + return this.docShell && !this.docShell.isBeingDestroyed() + ? this.docShell.domWindow + : null; + } + + get outerWindowID() { + if (this.docShell) { + return this.docShell.outerWindowID; + } + return null; + } + + get browsingContext() { + return this.docShell?.browsingContext; + } + + get browsingContextID() { + return this.browsingContext?.id; + } + + get browserId() { + return this.browsingContext?.browserId; + } + + get openerBrowserId() { + return this.browsingContext?.opener?.browserId; + } + + /** + * Getter for the WebExtensions ContentScript globals related to the + * window global's current DOM window. + */ + get webextensionsContentScriptGlobals() { + // Only retrieve the content scripts globals if the ExtensionContent JSM module + // has been already loaded (which is true if the WebExtensions internals have already + // been loaded in the same content process). + if (Cu.isESModuleLoaded(EXTENSION_CONTENT_SYS_MJS)) { + return lazy.ExtensionContent.getContentScriptGlobals(this.window); + } + + return []; + } + + /** + * Getter for the list of all content DOM windows in the window global. + * @return {Array} + */ + get windows() { + return this.docShells.map(docShell => { + return docShell.domWindow; + }); + } + + /** + * Getter for the original docShell this actor got attached to in the first + * place. + * Note that your actor should normally *not* rely on this top level docShell + * if you want it to show information relative to the iframe that's currently + * being inspected in the toolbox. + */ + get originalDocShell() { + if (!this._originalWindow) { + return this.docShell; + } + + return this._originalWindow.docShell; + } + + /** + * Getter for the original window this actor got attached to in the first + * place. + * Note that your actor should normally *not* rely on this top level window if + * you want it to show information relative to the iframe that's currently + * being inspected in the toolbox. + */ + get originalWindow() { + return this._originalWindow || this.window; + } + + /** + * Getter for the nsIWebProgress for watching this window. + */ + get webProgress() { + return this.docShell + .QueryInterface(Ci.nsIInterfaceRequestor) + .getInterface(Ci.nsIWebProgress); + } + + /** + * Getter for the nsIWebNavigation for the target. + */ + get webNavigation() { + return this.docShell.QueryInterface(Ci.nsIWebNavigation); + } + + /** + * Getter for the window global's document. + */ + get contentDocument() { + return this.webNavigation.document; + } + + /** + * Getter for the window global's title. + */ + get title() { + return this.contentDocument.title; + } + + /** + * Getter for the window global's URL. + */ + get url() { + if (this.webNavigation.currentURI) { + return this.webNavigation.currentURI.spec; + } + // Abrupt closing of the browser window may leave callbacks without a + // currentURI. + return null; + } + + get sourcesManager() { + if (!this._sourcesManager) { + this._sourcesManager = new SourcesManager(this.threadActor); + } + return this._sourcesManager; + } + + getStyleSheetsManager() { + if (!this._styleSheetsManager) { + this._styleSheetsManager = new StyleSheetsManager(this); + } + return this._styleSheetsManager; + } + + _createExtraActors() { + // Always use the same Pool, so existing actor instances + // (created in createExtraActors) are not lost. + if (!this._targetScopedActorPool) { + this._targetScopedActorPool = new LazyPool(this.conn); + } + + // Walk over target-scoped actor factories and make sure they are all + // instantiated and added into the Pool. + return createExtraActors( + ActorRegistry.targetScopedActorFactories, + this._targetScopedActorPool, + this + ); + } + + form() { + assert( + !this.isDestroyed(), + "form() shouldn't be called on destroyed browser actor." + ); + assert(this.actorID, "Actor should have an actorID."); + + // Note that we don't want the iframe dropdown to change our BrowsingContext.id/innerWindowId + // We only want to refer to the topmost original window we attached to + // as that's the one top document this target actor really represent. + // The iframe dropdown is just a hack that temporarily focus the scope + // of the target actor to a children iframe document. + // + // Also, for WebExtension, we want the target to represent the <browser> element + // created by DevTools, which always exists and help better connect resources to the target + // in the frontend. Otherwise all other <browser> element of webext may be reloaded or go away + // and then we would have troubles matching targets for resources. + const originalBrowsingContext = this + .devtoolsSpawnedBrowsingContextForWebExtension + ? this.devtoolsSpawnedBrowsingContextForWebExtension + : this.originalDocShell.browsingContext; + const browsingContextID = originalBrowsingContext.id; + const innerWindowId = + originalBrowsingContext.currentWindowContext.innerWindowId; + const parentInnerWindowId = + originalBrowsingContext.parent?.currentWindowContext.innerWindowId; + // Doesn't only check `!!opener` as some iframe might have an opener + // if their location was loaded via `window.open(url, "iframe-name")`. + // So also ensure that the document is opened in a distinct tab. + const isPopup = + !!originalBrowsingContext.opener && + originalBrowsingContext.browserId != + originalBrowsingContext.opener.browserId; + + const response = { + actor: this.actorID, + browsingContextID, + processID: Services.appinfo.processID, + // True for targets created by JSWindowActors, see constructor JSDoc. + followWindowGlobalLifeCycle: this.followWindowGlobalLifeCycle, + innerWindowId, + parentInnerWindowId, + topInnerWindowId: this.browsingContext.topWindowContext.innerWindowId, + isTopLevelTarget: this.isTopLevelTarget, + ignoreSubFrames: this.ignoreSubFrames, + isPopup, + isPrivate: this.isPrivate, + traits: { + // @backward-compat { version 64 } Exposes a new trait to help identify + // BrowsingContextActor's inherited actors from the client side. + isBrowsingContext: true, + // Browsing context targets can compute the isTopLevelTarget flag on the + // server. But other target actors don't support this yet. See Bug 1709314. + supportsTopLevelTargetFlag: true, + // Supports frame listing via `listFrames` request and `frameUpdate` events + // as well as frame switching via `switchToFrame` request + frames: true, + // Supports the logInPage request. + logInPage: true, + // Supports watchpoints in the server. We need to keep this trait because target + // actors that don't extend WindowGlobalTargetActor (Worker, ContentProcess, …) + // might not support watchpoints. + watchpoints: true, + // Supports back and forward navigation + navigation: true, + }, + }; + + // We may try to access window while the document is closing, then accessing window + // throws. + if (!this.docShell.isBeingDestroyed()) { + response.title = this.title; + response.url = this.url; + response.outerWindowID = this.outerWindowID; + } + + const actors = this._createExtraActors(); + Object.assign(response, actors); + + // The thread actor is the only actor manually created by the target actor. + // It is not registered in targetScopedActorFactories and therefore needs + // to be added here manually. + if (this.threadActor) { + Object.assign(response, { + threadActor: this.threadActor.actorID, + }); + } + + return response; + } + + /** + * Called when the actor is removed from the connection. + * + * @params {Object} options + * @params {Boolean} options.isTargetSwitching: Set to true when this is called during + * a target switch. + * @params {Boolean} options.isModeSwitching: Set to true true when this is called as the + * result of a change to the devtools.browsertoolbox.scope pref. + */ + destroy({ isTargetSwitching = false, isModeSwitching = false } = {}) { + // Avoid reentrancy. We will destroy the Transport when emitting "destroyed", + // which will force destroying all actors. + if (this.destroying) { + return; + } + this.destroying = true; + + // Tell the thread actor that the window global is closed, so that it may terminate + // instead of resuming the debuggee script. + // TODO: Bug 997119: Remove this coupling with thread actor + if (this.threadActor) { + this.threadActor._parentClosed = true; + } + + if (this._touchSimulator) { + this._touchSimulator.stop(); + this._touchSimulator = null; + } + + // Check for `docShell` availability, as it can be already gone during + // Firefox shutdown. + if (this.docShell) { + this._unwatchDocShell(this.docShell); + + // If this target is being destroyed as part of a target switch or a mode switch, + // we don't need to restore the configuration (this might cause the content page to + // be focused again, causing issues in tests and disturbing the user when switching modes). + if (!isTargetSwitching && !isModeSwitching) { + this._restoreTargetConfiguration(); + } + } + this._unwatchDocshells(); + + this._destroyThreadActor(); + + if (this._styleSheetsManager) { + this._styleSheetsManager.destroy(); + this._styleSheetsManager = null; + } + + // Shut down actors that belong to this target's pool. + if (this._targetScopedActorPool) { + this._targetScopedActorPool.destroy(); + this._targetScopedActorPool = null; + } + + // Make sure that no more workerListChanged notifications are sent. + if (this._workerDescriptorActorList !== null) { + this._workerDescriptorActorList.destroy(); + this._workerDescriptorActorList = null; + } + + if (this._workerDescriptorActorPool !== null) { + this._workerDescriptorActorPool.destroy(); + this._workerDescriptorActorPool = null; + } + + if (this._dbg) { + this._dbg.disable(); + this._dbg = null; + } + + // Emit a last event before calling Actor.destroy + // which will destroy the EventEmitter API + this.emit("destroyed", { isTargetSwitching, isModeSwitching }); + + // Destroy BaseTargetActor before nullifying docShell in case any child actor queries the window/docShell. + super.destroy(); + + this.docShell = null; + this._extraActors = null; + + Services.obs.removeObserver( + this._onConsoleApiProfilerEvent, + "console-api-profiler" + ); + + TargetActorRegistry.unregisterTargetActor(this); + Resources.unwatchAllResources(this); + } + + /** + * Return true if the given global is associated with this window global and should + * be added as a debuggee, false otherwise. + */ + _shouldAddNewGlobalAsDebuggee(wrappedGlobal) { + // Otherwise, check if it is a WebExtension content script sandbox + const global = unwrapDebuggerObjectGlobal(wrappedGlobal); + if (!global) { + return false; + } + + // Check if the global is a sdk page-mod sandbox. + let metadata = {}; + let id = ""; + try { + id = getInnerId(this.window); + metadata = Cu.getSandboxMetadata(global); + } catch (e) { + // ignore + } + if (metadata?.["inner-window-id"] && metadata["inner-window-id"] == id) { + return true; + } + + return false; + } + + _watchDocshells() { + // If for some unexpected reason, the actor is immediately destroyed, + // avoid registering leaking observer listener. + if (this.isDestroyed()) { + return; + } + + // In child processes, we watch all docshells living in the process. + Services.obs.addObserver(this, "webnavigation-create"); + Services.obs.addObserver(this, "webnavigation-destroy"); + this._docShellsObserved = true; + + // We watch for all child docshells under the current document, + this._progressListener.watch(this.docShell); + + // And list all already existing ones. + this._updateChildDocShells(); + } + + _unwatchDocshells() { + if (this._progressListener) { + this._progressListener.destroy(); + this._progressListener = null; + this._originalWindow = null; + } + + // Removes the observers being set in _watchDocshells, but only + // if _watchDocshells has been called. The target actor may be immediately destroyed + // and doesn't have time to register them. + // (Calling removeObserver without having called addObserver throws) + if (this._docShellsObserved) { + Services.obs.removeObserver(this, "webnavigation-create"); + Services.obs.removeObserver(this, "webnavigation-destroy"); + this._docShellsObserved = false; + } + } + + _unwatchDocShell(docShell) { + if (this._progressListener) { + this._progressListener.unwatch(docShell); + } + } + + switchToFrame(request) { + const windowId = request.windowId; + let win; + + try { + win = Services.wm.getOuterWindowWithId(windowId); + } catch (e) { + // ignore + } + if (!win) { + throw { + error: "noWindow", + message: "The related docshell is destroyed or not found", + }; + } else if (win == this.window) { + return {}; + } + + // Reply first before changing the document + DevToolsUtils.executeSoon(() => this._changeTopLevelDocument(win)); + + return {}; + } + + listFrames(request) { + const windows = this._docShellsToWindows(this.docShells); + return { frames: windows }; + } + + ensureWorkerDescriptorActorList() { + if (this._workerDescriptorActorList === null) { + this._workerDescriptorActorList = new WorkerDescriptorActorList( + this.conn, + { + type: Ci.nsIWorkerDebugger.TYPE_DEDICATED, + window: this.window, + } + ); + } + return this._workerDescriptorActorList; + } + + pauseWorkersUntilAttach(shouldPause) { + this.ensureWorkerDescriptorActorList().workerPauser.setPauseMatching( + shouldPause + ); + } + + listWorkers(request) { + return this.ensureWorkerDescriptorActorList() + .getList() + .then(actors => { + const pool = new Pool(this.conn, "worker-targets"); + for (const actor of actors) { + pool.manage(actor); + } + + // Do not destroy the pool before transfering ownership to the newly created + // pool, so that we do not accidently destroy actors that are still in use. + if (this._workerDescriptorActorPool) { + this._workerDescriptorActorPool.destroy(); + } + + this._workerDescriptorActorPool = pool; + this._workerDescriptorActorList.onListChanged = + this._onWorkerDescriptorActorListChanged; + + return { + workers: actors, + }; + }); + } + + logInPage(request) { + const { text, category, flags } = request; + const scriptErrorClass = Cc["@mozilla.org/scripterror;1"]; + const scriptError = scriptErrorClass.createInstance(Ci.nsIScriptError); + scriptError.initWithWindowID( + text, + null, + null, + 0, + 0, + flags, + category, + getInnerId(this.window) + ); + Services.console.logMessage(scriptError); + return {}; + } + + _onWorkerDescriptorActorListChanged() { + this._workerDescriptorActorList.onListChanged = null; + this.emit("workerListChanged"); + } + + _onConsoleApiProfilerEvent(subject, topic, data) { + // TODO: We will receive console-api-profiler events for any browser running + // in the same process as this target. We should filter irrelevant events, + // but console-api-profiler currently doesn't emit any information to identify + // the origin of the event. See Bug 1731033. + + // The new performance panel is not compatible with console.profile(). + const warningFlag = 1; + this.logInPage({ + text: + "console.profile is not compatible with the new Performance recorder. " + + "See https://bugzilla.mozilla.org/show_bug.cgi?id=1730896", + category: "console.profile unavailable", + flags: warningFlag, + }); + } + + observe(subject, topic, data) { + // Ignore any event that comes before/after the actor is attached. + // That typically happens during Firefox shutdown. + if (this.isDestroyed()) { + return; + } + + subject.QueryInterface(Ci.nsIDocShell); + + if (topic == "webnavigation-create") { + this._onDocShellCreated(subject); + } else if (topic == "webnavigation-destroy") { + this._onDocShellDestroy(subject); + } + } + + _onDocShellCreated(docShell) { + // (chrome-)webnavigation-create is fired very early during docshell + // construction. In new root docshells within child processes, involving + // BrowserChild, this event is from within this call: + // https://hg.mozilla.org/mozilla-central/annotate/74d7fb43bb44/dom/ipc/TabChild.cpp#l912 + // whereas the chromeEventHandler (and most likely other stuff) is set + // later: + // https://hg.mozilla.org/mozilla-central/annotate/74d7fb43bb44/dom/ipc/TabChild.cpp#l944 + // So wait a tick before watching it: + DevToolsUtils.executeSoon(() => { + // Bug 1142752: sometimes, the docshell appears to be immediately + // destroyed, bailout early to prevent random exceptions. + if (docShell.isBeingDestroyed()) { + return; + } + + // In child processes, we have new root docshells, + // let's watch them and all their child docshells. + if (this._isRootDocShell(docShell) && this.watchNewDocShells) { + this._progressListener.watch(docShell); + } + this._notifyDocShellsUpdate([docShell]); + }); + } + + _onDocShellDestroy(docShell) { + // Stop watching this docshell (the unwatch() method will check if we + // started watching it before). + this._unwatchDocShell(docShell); + + const webProgress = docShell + .QueryInterface(Ci.nsIInterfaceRequestor) + .getInterface(Ci.nsIWebProgress); + this._notifyDocShellDestroy(webProgress); + + if (webProgress.DOMWindow == this._originalWindow) { + // If the original top level document we connected to is removed, + // we try to switch to any other top level document + const rootDocShells = this.docShells.filter(d => { + // Ignore docshells without a working DOM Window. + // When we close firefox we have a chrome://extensions/content/dummy.xhtml + // which is in process of being destroyed and we might try to fallback to it. + // Unfortunately docshell.isBeingDestroyed() doesn't return true... + return d != this.docShell && this._isRootDocShell(d) && d.DOMWindow; + }); + if (rootDocShells.length) { + const newRoot = rootDocShells[0]; + this._originalWindow = newRoot.DOMWindow; + this._changeTopLevelDocument(this._originalWindow); + } else { + // If for some reason (typically during Firefox shutdown), the original + // document is destroyed, and there is no other top level docshell, + // we detach the actor to unregister all listeners and prevent any + // exception. + this.destroy(); + } + return; + } + + // If the currently targeted window global is destroyed, and we aren't on + // the top-level document, we have to switch to the top-level one. + if ( + webProgress.DOMWindow == this.window && + this.window != this._originalWindow + ) { + this._changeTopLevelDocument(this._originalWindow); + } + } + + _isRootDocShell(docShell) { + // Should report as root docshell: + // - New top level window's docshells, when using ParentProcessTargetActor against a + // process. It allows tracking iframes of the newly opened windows + // like Browser console or new browser windows. + // - MozActivities or window.open frames on B2G, where a new root docshell + // is spawn in the child process of the app. + return !docShell.parent; + } + + _docShellToWindow(docShell) { + const webProgress = docShell + .QueryInterface(Ci.nsIInterfaceRequestor) + .getInterface(Ci.nsIWebProgress); + const window = webProgress.DOMWindow; + const id = docShell.outerWindowID; + let parentID = undefined; + // Ignore the parent of the original document on non-e10s firefox, + // as we get the xul window as parent and don't care about it. + // Furthermore, ignore setting parentID when parent window is same as + // current window in order to deal with front end. e.g. toolbox will be fall + // into infinite loop due to recursive search with by using parent id. + if ( + window.parent && + window.parent != window && + window != this._originalWindow + ) { + parentID = window.parent.docShell.outerWindowID; + } + + return { + id, + parentID, + isTopLevel: window == this.originalWindow && this.isTopLevelTarget, + url: window.location.href, + title: window.document.title, + }; + } + + // Convert docShell list to windows objects list being sent to the client + _docShellsToWindows(docshells) { + return docshells + .filter(docShell => { + // Ensure docShell.document is available. + docShell.QueryInterface(Ci.nsIWebNavigation); + + // don't include transient about:blank documents + if (docShell.document.isInitialDocument) { + return false; + } + + return true; + }) + .map(docShell => this._docShellToWindow(docShell)); + } + + _notifyDocShellsUpdate(docshells) { + // Only top level target uses frameUpdate in order to update the iframe dropdown. + // This may eventually be replaced by Target listening and target switching. + if (!this.isTopLevelTarget) { + return; + } + + const windows = this._docShellsToWindows(docshells); + + // Do not send the `frameUpdate` event if the windows array is empty. + if (!windows.length) { + return; + } + + this.emit("frameUpdate", { + frames: windows, + }); + } + + _updateChildDocShells() { + this._notifyDocShellsUpdate(this.docShells); + } + + _notifyDocShellDestroy(webProgress) { + // Only top level target uses frameUpdate in order to update the iframe dropdown. + // This may eventually be replaced by Target listening and target switching. + if (!this.isTopLevelTarget) { + return; + } + + webProgress = webProgress.QueryInterface(Ci.nsIWebProgress); + const id = webProgress.DOMWindow.docShell.outerWindowID; + this.emit("frameUpdate", { + frames: [ + { + id, + destroy: true, + }, + ], + }); + } + + /** + * Creates and manages the thread actor as part of the Browsing Context Target pool. + * This sets up the content window for being debugged + */ + _createThreadActor() { + this.threadActor = new ThreadActor(this, this.window); + this.manage(this.threadActor); + } + + /** + * Exits the current thread actor and removes it from the Browsing Context Target pool. + * The content window is no longer being debugged after this call. + */ + _destroyThreadActor() { + if (this.threadActor) { + this.threadActor.destroy(); + this.threadActor = null; + } + + if (this._sourcesManager) { + this._sourcesManager.destroy(); + this._sourcesManager = null; + } + } + + // Protocol Request Handlers + + detach(request) { + // Destroy the actor in the next event loop in order + // to ensure responding to the `detach` request. + DevToolsUtils.executeSoon(() => { + this.destroy(); + }); + + return {}; + } + + /** + * Bring the window global's window to front. + */ + focus() { + if (this.window) { + this.window.focus(); + } + return {}; + } + + goForward() { + // Wait a tick so that the response packet can be dispatched before the + // subsequent navigation event packet. + Services.tm.dispatchToMainThread( + DevToolsUtils.makeInfallible(() => { + // This won't work while the browser is shutting down and we don't really + // care. + if (Services.startup.shuttingDown) { + return; + } + + this.webNavigation.goForward(); + }, "WindowGlobalTargetActor.prototype.goForward's delayed body") + ); + + return {}; + } + + goBack() { + // Wait a tick so that the response packet can be dispatched before the + // subsequent navigation event packet. + Services.tm.dispatchToMainThread( + DevToolsUtils.makeInfallible(() => { + // This won't work while the browser is shutting down and we don't really + // care. + if (Services.startup.shuttingDown) { + return; + } + + this.webNavigation.goBack(); + }, "WindowGlobalTargetActor.prototype.goBack's delayed body") + ); + + return {}; + } + + /** + * Reload the page in this window global. + * + * @backward-compat { legacy } + * reload is preserved for third party tools. See Bug 1717837. + * DevTools should use Descriptor::reloadDescriptor instead. + */ + reload(request) { + const force = request?.options?.force; + // Wait a tick so that the response packet can be dispatched before the + // subsequent navigation event packet. + Services.tm.dispatchToMainThread( + DevToolsUtils.makeInfallible(() => { + // This won't work while the browser is shutting down and we don't really + // care. + if (Services.startup.shuttingDown) { + return; + } + + this.webNavigation.reload( + force + ? Ci.nsIWebNavigation.LOAD_FLAGS_BYPASS_CACHE + : Ci.nsIWebNavigation.LOAD_FLAGS_NONE + ); + }, "WindowGlobalTargetActor.prototype.reload's delayed body") + ); + return {}; + } + + /** + * Navigate this window global to a new location + */ + navigateTo(request) { + // Wait a tick so that the response packet can be dispatched before the + // subsequent navigation event packet. + Services.tm.dispatchToMainThread( + DevToolsUtils.makeInfallible(() => { + this.window.location = request.url; + }, "WindowGlobalTargetActor.prototype.navigateTo's delayed body:" + request.url) + ); + return {}; + } + + /** + * For browsing-context targets which can't use the watcher configuration + * actor (eg webextension targets), the client directly calls `reconfigure`. + * Once all targets support the watcher, this method can be removed. + */ + reconfigure(request) { + const options = request.options || {}; + return this.updateTargetConfiguration(options); + } + + /** + * Apply target-specific options. + * + * This will be called by the watcher when the DevTools target-configuration + * is updated, or when a target is created via JSWindowActors. + */ + updateTargetConfiguration(options = {}, calledFromDocumentCreation = false) { + if (!this.docShell) { + // The window global is already closed. + return; + } + + // Also update configurations which applies to all target types + super.updateTargetConfiguration(options, calledFromDocumentCreation); + + let reload = false; + if (typeof options.touchEventsOverride !== "undefined") { + const enableTouchSimulator = options.touchEventsOverride === "enabled"; + + this.docShell.metaViewportOverride = enableTouchSimulator + ? Ci.nsIDocShell.META_VIEWPORT_OVERRIDE_ENABLED + : Ci.nsIDocShell.META_VIEWPORT_OVERRIDE_NONE; + + // We want to reload the document if it's an "existing" top level target on which + // the touch simulator will be toggled and the user has turned the + // "reload on touch simulation" setting on. + if ( + enableTouchSimulator !== this.touchSimulator.enabled && + options.reloadOnTouchSimulationToggle === true && + this.isTopLevelTarget && + !calledFromDocumentCreation + ) { + reload = true; + } + + if (enableTouchSimulator) { + this.touchSimulator.start(); + } else { + this.touchSimulator.stop(); + } + } + + if (typeof options.customFormatters !== "undefined") { + this.customFormatters = options.customFormatters; + } + + if (typeof options.useSimpleHighlightersForReducedMotion == "boolean") { + this._useSimpleHighlightersForReducedMotion = + options.useSimpleHighlightersForReducedMotion; + this.emit("use-simple-highlighters-updated"); + } + + if (!this.isTopLevelTarget) { + // Following DevTools target options should only apply to the top target and be + // propagated through the window global tree via the platform. + return; + } + if (typeof options.restoreFocus == "boolean") { + this._restoreFocus = options.restoreFocus; + } + if (typeof options.recordAllocations == "object") { + const actor = this._memoryActor; + if (options.recordAllocations == null) { + actor.stopRecordingAllocations(); + } else { + actor.attach(); + actor.startRecordingAllocations(options.recordAllocations); + } + } + + if (reload) { + this.webNavigation.reload(Ci.nsIWebNavigation.LOAD_FLAGS_NONE); + } + } + + get touchSimulator() { + if (!this._touchSimulator) { + this._touchSimulator = new TouchSimulator(this.chromeEventHandler); + } + + return this._touchSimulator; + } + + /** + * Opposite of the updateTargetConfiguration method, that resets document + * state when closing the toolbox. + */ + _restoreTargetConfiguration() { + if (this._restoreFocus && this.browsingContext?.isActive) { + this.window.focus(); + } + } + + _changeTopLevelDocument(window) { + // In case of WebExtension, still using one WindowGlobalTarget instance for many document, + // when reloading the add-on we might not destroy the previous target and wait for the next + // one to come and destroy it. + if (this.window) { + // Fake a will-navigate on the previous document + // to let a chance to unregister it + this._willNavigate({ + window: this.window, + newURI: window.location.href, + request: null, + isFrameSwitching: true, + navigationStart: Date.now(), + }); + + this._windowDestroyed(this.window, { + isFrozen: true, + isFrameSwitching: true, + }); + } + + // Immediately change the window as this window, if in process of unload + // may already be non working on the next cycle and start throwing + this._setWindow(window); + + DevToolsUtils.executeSoon(() => { + // No need to do anything more if the actor is destroyed. + // e.g. the client has been closed and the actors destroyed in the meantime. + if (this.isDestroyed()) { + return; + } + + // Then fake window-ready and navigate on the given document + this._windowReady(window, { isFrameSwitching: true }); + DevToolsUtils.executeSoon(() => { + this._navigate(window, true); + }); + }); + } + + _setWindow(window) { + // Here is the very important call where we switch the currently targeted + // window global (it will indirectly update this.window and many other + // attributes defined from docShell). + this.docShell = window.docShell; + this.emit("changed-toplevel-document"); + this.emit("frameUpdate", { + selected: this.outerWindowID, + }); + } + + /** + * Handle location changes, by clearing the previous debuggees and enabling + * debugging, which may have been disabled temporarily by the + * DebuggerProgressListener. + */ + _windowReady(window, { isFrameSwitching, isBFCache } = {}) { + if (this.ignoreSubFrames) { + return; + } + const isTopLevel = window == this.window; + + // We just reset iframe list on WillNavigate, so we now list all existing + // frames when we load a new document in the original window + if (window == this._originalWindow && !isFrameSwitching) { + this._updateChildDocShells(); + } + + // If this follows WindowGlobal lifecycle, a new Target actor will be spawn for the top level + // target document. Only notify about in-process iframes. + // Note that OOP iframes won't emit window-ready and will also have their dedicated target. + // Also, we allow window-ready to be fired for iframe switching of top level documents, + // otherwise the iframe dropdown no longer works with server side targets. + if (this.followWindowGlobalLifeCycle && isTopLevel && !isFrameSwitching) { + return; + } + + this.emit("window-ready", { + window, + isTopLevel, + isBFCache, + id: getWindowID(window), + isFrameSwitching, + }); + } + + _windowDestroyed( + window, + { id = null, isFrozen = false, isFrameSwitching = false } + ) { + if (this.ignoreSubFrames) { + return; + } + const isTopLevel = window == this.window; + + // If this follows WindowGlobal lifecycle, this target will be destroyed, alongside its top level document. + // Only notify about in-process iframes. + // Note that OOP iframes won't emit window-ready and will also have their dedicated target. + // Also, we allow window-destroyed to be fired for iframe switching of top level documents, + // otherwise the iframe dropdown no longer works with server side targets. + if (this.followWindowGlobalLifeCycle && isTopLevel && !isFrameSwitching) { + return; + } + + this.emit("window-destroyed", { + window, + isTopLevel, + id: id || getWindowID(window), + isFrozen, + }); + } + + /** + * Start notifying server and client about a new document being loaded in the + * currently targeted window global. + */ + _willNavigate({ + window, + newURI, + request, + isFrameSwitching = false, + navigationStart, + }) { + if (this.ignoreSubFrames) { + return; + } + let isTopLevel = window == this.window; + + let reset = false; + if (window == this._originalWindow && !isFrameSwitching) { + // If the top level document changes and we are targeting an iframe, we + // need to reset to the upcoming new top level document. But for this + // will-navigate event, we will dispatch on the old window. (The inspector + // codebase expect to receive will-navigate for the currently displayed + // document in order to cleanup the markup view) + if (this.window != this._originalWindow) { + reset = true; + window = this.window; + isTopLevel = true; + } + } + + // will-navigate event needs to be dispatched synchronously, by calling the + // listeners in the order or registration. This event fires once navigation + // starts, (all pending user prompts are dealt with), but before the first + // request starts. + this.emit("will-navigate", { + window, + isTopLevel, + newURI, + request, + navigationStart, + isFrameSwitching, + }); + + // We don't do anything for inner frames here. + // (we will only update thread actor on window-ready) + if (!isTopLevel) { + return; + } + + // When the actor acts as a WindowGlobalTarget, will-navigate won't fired. + // Instead we will receive a new top level target with isTargetSwitching=true. + if (!this.followWindowGlobalLifeCycle) { + this.emit("tabNavigated", { + url: newURI, + state: "start", + isFrameSwitching, + }); + } + + if (reset) { + this._setWindow(this._originalWindow); + } + } + + /** + * Notify server and client about a new document done loading in the current + * targeted window global. + */ + _navigate(window, isFrameSwitching = false) { + if (this.ignoreSubFrames) { + return; + } + const isTopLevel = window == this.window; + + // navigate event needs to be dispatched synchronously, + // by calling the listeners in the order or registration. + // This event is fired once the document is loaded, + // after the load event, it's document ready-state is 'complete'. + this.emit("navigate", { + window, + isTopLevel, + }); + + // We don't do anything for inner frames here. + // (we will only update thread actor on window-ready) + if (!isTopLevel) { + return; + } + + // We may still significate when the document is done loading, via navigate. + // But as we no longer fire the "will-navigate", may be it is better to find + // other ways to get to our means. + // Listening to "navigate" is misleading as the document may already be loaded + // if we just opened the DevTools. So it is better to use "watch" pattern + // and instead have the actor either emit immediately resources as they are + // already available, or later on as the load progresses. + if (this.followWindowGlobalLifeCycle) { + return; + } + + this.emit("tabNavigated", { + url: this.url, + title: this.title, + state: "stop", + isFrameSwitching, + }); + } + + removeActorByName(name) { + if (name in this._extraActors) { + const actor = this._extraActors[name]; + if (this._targetScopedActorPool.has(actor)) { + this._targetScopedActorPool.removeActor(actor); + } + delete this._extraActors[name]; + } + } +} + +exports.WindowGlobalTargetActor = WindowGlobalTargetActor; + +class DebuggerProgressListener { + /** + * The DebuggerProgressListener class is an nsIWebProgressListener which + * handles onStateChange events for the targeted window global. If the user + * tries to navigate away from a paused page, the listener makes sure that the + * debuggee is resumed before the navigation begins. + * + * @param WindowGlobalTargetActor targetActor + * The window global target actor associated with this listener. + */ + constructor(targetActor) { + this._targetActor = targetActor; + this._onWindowCreated = this.onWindowCreated.bind(this); + this._onWindowHidden = this.onWindowHidden.bind(this); + + // Watch for windows destroyed (global observer that will need filtering) + Services.obs.addObserver(this, "inner-window-destroyed"); + + // XXX: for now we maintain the list of windows we know about in this instance + // so that we can discriminate windows we care about when observing + // inner-window-destroyed events. Bug 1016952 would remove the need for this. + this._knownWindowIDs = new Map(); + + this._watchedDocShells = new WeakSet(); + } + + QueryInterface = ChromeUtils.generateQI([ + "nsIWebProgressListener", + "nsISupportsWeakReference", + ]); + + destroy() { + Services.obs.removeObserver(this, "inner-window-destroyed"); + this._knownWindowIDs.clear(); + this._knownWindowIDs = null; + } + + watch(docShell) { + // Add the docshell to the watched set. We're actually adding the window, + // because docShell objects are not wrappercached and would be rejected + // by the WeakSet. + const docShellWindow = docShell.domWindow; + this._watchedDocShells.add(docShellWindow); + + const webProgress = docShell + .QueryInterface(Ci.nsIInterfaceRequestor) + .getInterface(Ci.nsIWebProgress); + webProgress.addProgressListener( + this, + Ci.nsIWebProgress.NOTIFY_STATE_WINDOW | + Ci.nsIWebProgress.NOTIFY_STATE_DOCUMENT + ); + + const handler = getDocShellChromeEventHandler(docShell); + handler.addEventListener("DOMWindowCreated", this._onWindowCreated, true); + handler.addEventListener("pageshow", this._onWindowCreated, true); + handler.addEventListener("pagehide", this._onWindowHidden, true); + + // Dispatch the _windowReady event on the targetActor for pre-existing windows + const windows = this._targetActor.ignoreSubFrames + ? [docShellWindow] + : this._getWindowsInDocShell(docShell); + for (const win of windows) { + this._targetActor._windowReady(win); + this._knownWindowIDs.set(getWindowID(win), win); + } + + // The `watchedByDevTools` enables gecko behavior tied to this flag, such as: + // - reporting the contents of HTML loaded in the docshells, + // - or capturing stacks for the network monitor. + // + // This flag is also set in frame-helper but in the case of the browser toolbox, we + // don't have the watcher enabled by default yet, and as a result we need to set it + // here for the parent process window global. + // This should be removed as part of Bug 1709529. + if (this._targetActor.typeName === "parentProcessTarget") { + docShell.browsingContext.watchedByDevTools = true; + } + // Immediately enable CSS error reports on new top level docshells, if this was already enabled. + // This is specific to MBT and WebExtension targets (so the isRootActor check). + if ( + this._targetActor.isRootActor && + this._targetActor.docShell.cssErrorReportingEnabled + ) { + docShell.cssErrorReportingEnabled = true; + } + } + + unwatch(docShell) { + const docShellWindow = docShell.domWindow; + if (!this._watchedDocShells.has(docShellWindow)) { + return; + } + this._watchedDocShells.delete(docShellWindow); + + const webProgress = docShell + .QueryInterface(Ci.nsIInterfaceRequestor) + .getInterface(Ci.nsIWebProgress); + // During process shutdown, the docshell may already be cleaned up and throw + try { + webProgress.removeProgressListener(this); + } catch (e) { + // ignore + } + + const handler = getDocShellChromeEventHandler(docShell); + handler.removeEventListener( + "DOMWindowCreated", + this._onWindowCreated, + true + ); + handler.removeEventListener("pageshow", this._onWindowCreated, true); + handler.removeEventListener("pagehide", this._onWindowHidden, true); + + const windows = this._targetActor.ignoreSubFrames + ? [docShellWindow] + : this._getWindowsInDocShell(docShell); + for (const win of windows) { + this._knownWindowIDs.delete(getWindowID(win)); + } + + // We only reset it for parent process target actor as the flag should be set in parent + // process, and thus is set elsewhere for other type of BrowsingContextActor. + if (this._targetActor.typeName === "parentProcessTarget") { + docShell.browsingContext.watchedByDevTools = false; + } + } + + _getWindowsInDocShell(docShell) { + return getChildDocShells(docShell).map(d => { + return d.domWindow; + }); + } + + onWindowCreated = DevToolsUtils.makeInfallible(function (evt) { + if (this._targetActor.isDestroyed()) { + return; + } + + // If we're in a frame swap (which occurs when toggling RDM, for example), then we can + // ignore this event, as the window never really went anywhere for our purposes. + if (evt.inFrameSwap) { + return; + } + + const window = evt.target.defaultView; + if (!window) { + // Some old UIs might emit unrelated events called pageshow/pagehide on + // elements which are not documents. Bail in this case. See Bug 1669666. + return; + } + + const innerID = getWindowID(window); + + // This handler is called for two events: "DOMWindowCreated" and "pageshow". + // Bail out if we already processed this window. + if (this._knownWindowIDs.has(innerID)) { + return; + } + this._knownWindowIDs.set(innerID, window); + + // For a regular page navigation, "DOMWindowCreated" is fired before + // "pageshow". If the current event is "pageshow" but we have not processed + // the window yet, it means this is a BF cache navigation. In theory, + // `event.persisted` should be set for BF cache navigation events, but it is + // not always available, so we fallback on checking if "pageshow" is the + // first event received for a given window (see Bug 1378133). + const isBFCache = evt.type == "pageshow"; + + this._targetActor._windowReady(window, { isBFCache }); + }, "DebuggerProgressListener.prototype.onWindowCreated"); + + onWindowHidden = DevToolsUtils.makeInfallible(function (evt) { + if (this._targetActor.isDestroyed()) { + return; + } + + // If we're in a frame swap (which occurs when toggling RDM, for example), then we can + // ignore this event, as the window isn't really going anywhere for our purposes. + if (evt.inFrameSwap) { + return; + } + + // Only act as if the window has been destroyed if the 'pagehide' event + // was sent for a persisted window (persisted is set when the page is put + // and frozen in the bfcache). If the page isn't persisted, the observer's + // inner-window-destroyed event will handle it. + if (!evt.persisted) { + return; + } + + const window = evt.target.defaultView; + if (!window) { + // Some old UIs might emit unrelated events called pageshow/pagehide on + // elements which are not documents. Bail in this case. See Bug 1669666. + return; + } + + this._targetActor._windowDestroyed(window, { isFrozen: true }); + this._knownWindowIDs.delete(getWindowID(window)); + }, "DebuggerProgressListener.prototype.onWindowHidden"); + + observe = DevToolsUtils.makeInfallible(function (subject, topic) { + if (this._targetActor.isDestroyed()) { + return; + } + + // Because this observer will be called for all inner-window-destroyed in + // the application, we need to filter out events for windows we are not + // watching + const innerID = subject.QueryInterface(Ci.nsISupportsPRUint64).data; + const window = this._knownWindowIDs.get(innerID); + if (window) { + this._knownWindowIDs.delete(innerID); + this._targetActor._windowDestroyed(window, { id: innerID }); + } + + // Bug 1598364: when debugging browser.xhtml from the Browser Toolbox + // the DOMWindowCreated/pageshow/pagehide event listeners have to be + // re-registered against the next document when we reload browser.html + // (or navigate to another doc). + // That's because we registered the listener on docShell.domWindow as + // top level windows don't have a chromeEventHandler. + if ( + this._watchedDocShells.has(window) && + !window.docShell.chromeEventHandler + ) { + // First cleanup all the existing listeners + this.unwatch(window.docShell); + // Re-register new ones. The docShell is already referencing the new document. + this.watch(window.docShell); + } + }, "DebuggerProgressListener.prototype.observe"); + + onStateChange = DevToolsUtils.makeInfallible(function ( + progress, + request, + flag, + status + ) { + if (this._targetActor.isDestroyed()) { + return; + } + progress.QueryInterface(Ci.nsIDocShell); + if (progress.isBeingDestroyed()) { + return; + } + + const isStart = flag & Ci.nsIWebProgressListener.STATE_START; + const isStop = flag & Ci.nsIWebProgressListener.STATE_STOP; + const isDocument = flag & Ci.nsIWebProgressListener.STATE_IS_DOCUMENT; + const isWindow = flag & Ci.nsIWebProgressListener.STATE_IS_WINDOW; + + // Ideally, we would fetch navigationStart from window.performance.timing.navigationStart + // but as WindowGlobal isn't instantiated yet we don't have access to it. + // This is ultimately handed over to DocumentEventListener, which uses this. + // See its comment about WILL_NAVIGATE_TIME_SHIFT for more details about the related workaround. + const navigationStart = Date.now(); + + // Catch any iframe location change + if (isDocument && isStop) { + // Watch document stop to ensure having the new iframe url. + this._targetActor._notifyDocShellsUpdate([progress]); + } + + const window = progress.DOMWindow; + if (isDocument && isStart) { + // One of the earliest events that tells us a new URI + // is being loaded in this window. + const newURI = request instanceof Ci.nsIChannel ? request.URI.spec : null; + this._targetActor._willNavigate({ + window, + newURI, + request, + isFrameSwitching: false, + navigationStart, + }); + } + if (isWindow && isStop) { + // Don't dispatch "navigate" event just yet when there is a redirect to + // about:neterror page. + // Navigating to about:neterror will make `status` be something else than NS_OK. + // But for some error like NS_BINDING_ABORTED we don't want to emit any `navigate` + // event as the page load has been cancelled and the related page document is going + // to be a dead wrapper. + if ( + request.status != Cr.NS_OK && + request.status != Cr.NS_BINDING_ABORTED + ) { + // Instead, listen for DOMContentLoaded as about:neterror is loaded + // with LOAD_BACKGROUND flags and never dispatches load event. + // That may be the same reason why there is no onStateChange event + // for about:neterror loads. + const handler = getDocShellChromeEventHandler(progress); + const onLoad = evt => { + // Ignore events from iframes + if (evt.target === window.document) { + handler.removeEventListener("DOMContentLoaded", onLoad, true); + this._targetActor._navigate(window); + } + }; + handler.addEventListener("DOMContentLoaded", onLoad, true); + } else { + // Somewhat equivalent of load event. + // (window.document.readyState == complete) + this._targetActor._navigate(window); + } + } + }, + "DebuggerProgressListener.prototype.onStateChange"); +} |