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diff --git a/toolkit/components/webextensions/ExtensionContent.jsm b/toolkit/components/webextensions/ExtensionContent.jsm
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+this.EXPORTED_SYMBOLS = ["ExtensionContent"];
+
+/* globals ExtensionContent */
+
+/*
+ * This file handles the content process side of extensions. It mainly
+ * takes care of content script injection, content script APIs, and
+ * messaging.
+ *
+ * This file is also the initial entry point for addon processes.
+ * ExtensionChild.jsm is responsible for functionality specific to addon
+ * processes.
+ */
+
+const Ci = Components.interfaces;
+const Cc = Components.classes;
+const Cu = Components.utils;
+const Cr = Components.results;
+
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/AppConstants.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "ExtensionManagement",
+ "resource://gre/modules/ExtensionManagement.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "LanguageDetector",
+ "resource:///modules/translation/LanguageDetector.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "MatchPattern",
+ "resource://gre/modules/MatchPattern.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "MatchGlobs",
+ "resource://gre/modules/MatchPattern.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "MessageChannel",
+ "resource://gre/modules/MessageChannel.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "PromiseUtils",
+ "resource://gre/modules/PromiseUtils.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "Schemas",
+ "resource://gre/modules/Schemas.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "WebNavigationFrames",
+ "resource://gre/modules/WebNavigationFrames.jsm");
+
+Cu.import("resource://gre/modules/ExtensionChild.jsm");
+Cu.import("resource://gre/modules/ExtensionCommon.jsm");
+Cu.import("resource://gre/modules/ExtensionUtils.jsm");
+
+const {
+ EventEmitter,
+ LocaleData,
+ defineLazyGetter,
+ flushJarCache,
+ getInnerWindowID,
+ promiseDocumentReady,
+ runSafeSyncWithoutClone,
+} = ExtensionUtils;
+
+const {
+ BaseContext,
+ SchemaAPIManager,
+} = ExtensionCommon;
+
+const {
+ ChildAPIManager,
+ Messenger,
+} = ExtensionChild;
+
+XPCOMUtils.defineLazyGetter(this, "console", ExtensionUtils.getConsole);
+
+const CATEGORY_EXTENSION_SCRIPTS_CONTENT = "webextension-scripts-content";
+
+function isWhenBeforeOrSame(when1, when2) {
+ let table = {"document_start": 0,
+ "document_end": 1,
+ "document_idle": 2};
+ return table[when1] <= table[when2];
+}
+
+var apiManager = new class extends SchemaAPIManager {
+ constructor() {
+ super("content");
+ this.initialized = false;
+ }
+
+ generateAPIs(...args) {
+ if (!this.initialized) {
+ this.initialized = true;
+ for (let [/* name */, value] of XPCOMUtils.enumerateCategoryEntries(CATEGORY_EXTENSION_SCRIPTS_CONTENT)) {
+ this.loadScript(value);
+ }
+ }
+ return super.generateAPIs(...args);
+ }
+
+ registerSchemaAPI(namespace, envType, getAPI) {
+ if (envType == "content_child") {
+ super.registerSchemaAPI(namespace, envType, getAPI);
+ }
+ }
+}();
+
+// Represents a content script.
+function Script(extension, options, deferred = PromiseUtils.defer()) {
+ this.extension = extension;
+ this.options = options;
+ this.run_at = this.options.run_at;
+ this.js = this.options.js || [];
+ this.css = this.options.css || [];
+ this.remove_css = this.options.remove_css;
+ this.match_about_blank = this.options.match_about_blank;
+
+ this.deferred = deferred;
+
+ this.matches_ = new MatchPattern(this.options.matches);
+ this.exclude_matches_ = new MatchPattern(this.options.exclude_matches || null);
+ // TODO: MatchPattern should pre-mangle host-only patterns so that we
+ // don't need to call a separate match function.
+ this.matches_host_ = new MatchPattern(this.options.matchesHost || null);
+ this.include_globs_ = new MatchGlobs(this.options.include_globs);
+ this.exclude_globs_ = new MatchGlobs(this.options.exclude_globs);
+
+ this.requiresCleanup = !this.remove_css && (this.css.length > 0 || options.cssCode);
+}
+
+Script.prototype = {
+ get cssURLs() {
+ // We can handle CSS urls (css) and CSS code (cssCode).
+ let urls = [];
+ for (let url of this.css) {
+ urls.push(this.extension.baseURI.resolve(url));
+ }
+
+ if (this.options.cssCode) {
+ let url = "data:text/css;charset=utf-8," + encodeURIComponent(this.options.cssCode);
+ urls.push(url);
+ }
+
+ return urls;
+ },
+
+ matches(window) {
+ let uri = window.document.documentURIObject;
+ let principal = window.document.nodePrincipal;
+
+ // If mozAddonManager is present on this page, don't allow
+ // content scripts.
+ if (window.navigator.mozAddonManager !== undefined) {
+ return false;
+ }
+
+ if (this.match_about_blank && ["about:blank", "about:srcdoc"].includes(uri.spec)) {
+ // When matching about:blank/srcdoc documents, the checks below
+ // need to be performed against the "owner" document's URI.
+ uri = principal.URI;
+ }
+
+ // Documents from data: URIs also inherit the principal.
+ if (Services.netUtils.URIChainHasFlags(uri, Ci.nsIProtocolHandler.URI_INHERITS_SECURITY_CONTEXT)) {
+ if (!this.match_about_blank) {
+ return false;
+ }
+ uri = principal.URI;
+ }
+
+ if (!(this.matches_.matches(uri) || this.matches_host_.matchesIgnoringPath(uri))) {
+ return false;
+ }
+
+ if (this.exclude_matches_.matches(uri)) {
+ return false;
+ }
+
+ if (this.options.include_globs != null) {
+ if (!this.include_globs_.matches(uri.spec)) {
+ return false;
+ }
+ }
+
+ if (this.exclude_globs_.matches(uri.spec)) {
+ return false;
+ }
+
+ if (this.options.frame_id != null) {
+ if (WebNavigationFrames.getFrameId(window) != this.options.frame_id) {
+ return false;
+ }
+ } else if (!this.options.all_frames && window.top != window) {
+ return false;
+ }
+
+ return true;
+ },
+
+ cleanup(window) {
+ if (!this.remove_css) {
+ let winUtils = window.QueryInterface(Ci.nsIInterfaceRequestor)
+ .getInterface(Ci.nsIDOMWindowUtils);
+
+ for (let url of this.cssURLs) {
+ runSafeSyncWithoutClone(winUtils.removeSheetUsingURIString, url, winUtils.AUTHOR_SHEET);
+ }
+ }
+ },
+
+ /**
+ * Tries to inject this script into the given window and sandbox, if
+ * there are pending operations for the window's current load state.
+ *
+ * @param {Window} window
+ * The DOM Window to inject the scripts and CSS into.
+ * @param {Sandbox} sandbox
+ * A Sandbox inheriting from `window` in which to evaluate the
+ * injected scripts.
+ * @param {function} shouldRun
+ * A function which, when passed the document load state that a
+ * script is expected to run at, returns `true` if we should
+ * currently be injecting scripts for that load state.
+ *
+ * For initial injection of a script, this function should
+ * return true if the document is currently in or has already
+ * passed through the given state. For injections triggered by
+ * document state changes, it should only return true if the
+ * given state exactly matches the state that triggered the
+ * change.
+ * @param {string} when
+ * The document's current load state, or if triggered by a
+ * document state change, the new document state that triggered
+ * the injection.
+ */
+ tryInject(window, sandbox, shouldRun, when) {
+ if (shouldRun("document_start")) {
+ let {cssURLs} = this;
+ if (cssURLs.length > 0) {
+ let winUtils = window.QueryInterface(Ci.nsIInterfaceRequestor)
+ .getInterface(Ci.nsIDOMWindowUtils);
+
+ let method = this.remove_css ? winUtils.removeSheetUsingURIString : winUtils.loadSheetUsingURIString;
+ for (let url of cssURLs) {
+ runSafeSyncWithoutClone(method, url, winUtils.AUTHOR_SHEET);
+ }
+
+ this.deferred.resolve();
+ }
+ }
+
+ let result;
+ let scheduled = this.run_at || "document_idle";
+ if (shouldRun(scheduled)) {
+ for (let [i, url] of this.js.entries()) {
+ let options = {
+ target: sandbox,
+ charset: "UTF-8",
+ // Inject the last script asynchronously unless we're expected to
+ // inject before any page scripts have run, and we haven't already
+ // missed that boat.
+ async: (i === this.js.length - 1) &&
+ (this.run_at !== "document_start" || when !== "document_start"),
+ };
+ try {
+ result = Services.scriptloader.loadSubScriptWithOptions(url, options);
+ } catch (e) {
+ Cu.reportError(e);
+ this.deferred.reject(e);
+ }
+ }
+
+ if (this.options.jsCode) {
+ try {
+ result = Cu.evalInSandbox(this.options.jsCode, sandbox, "latest");
+ } catch (e) {
+ Cu.reportError(e);
+ this.deferred.reject(e);
+ }
+ }
+
+ this.deferred.resolve(result);
+ }
+ },
+};
+
+function getWindowMessageManager(contentWindow) {
+ let ir = contentWindow.QueryInterface(Ci.nsIInterfaceRequestor)
+ .getInterface(Ci.nsIDocShell)
+ .QueryInterface(Ci.nsIInterfaceRequestor);
+ try {
+ return ir.getInterface(Ci.nsIContentFrameMessageManager);
+ } catch (e) {
+ // Some windows don't support this interface (hidden window).
+ return null;
+ }
+}
+
+var DocumentManager;
+var ExtensionManager;
+
+/**
+ * An execution context for semi-privileged extension content scripts.
+ *
+ * This is the child side of the ContentScriptContextParent class
+ * defined in ExtensionParent.jsm.
+ */
+class ContentScriptContextChild extends BaseContext {
+ constructor(extension, contentWindow, contextOptions = {}) {
+ super("content_child", extension);
+
+ let {isExtensionPage} = contextOptions;
+
+ this.isExtensionPage = isExtensionPage;
+
+ this.setContentWindow(contentWindow);
+
+ let frameId = WebNavigationFrames.getFrameId(contentWindow);
+ this.frameId = frameId;
+
+ this.scripts = [];
+
+ let contentPrincipal = contentWindow.document.nodePrincipal;
+ let ssm = Services.scriptSecurityManager;
+
+ // copy origin attributes from the content window origin attributes to
+ // preserve the user context id. overwrite the addonId.
+ let attrs = contentPrincipal.originAttributes;
+ attrs.addonId = this.extension.id;
+ let extensionPrincipal = ssm.createCodebasePrincipal(this.extension.baseURI, attrs);
+
+ let principal;
+ if (ssm.isSystemPrincipal(contentPrincipal)) {
+ // Make sure we don't hand out the system principal by accident.
+ // also make sure that the null principal has the right origin attributes
+ principal = ssm.createNullPrincipal(attrs);
+ } else {
+ principal = [contentPrincipal, extensionPrincipal];
+ }
+
+ if (isExtensionPage) {
+ if (ExtensionManagement.getAddonIdForWindow(this.contentWindow) != this.extension.id) {
+ throw new Error("Invalid target window for this extension context");
+ }
+ // This is an iframe with content script API enabled and its principal should be the
+ // contentWindow itself. (we create a sandbox with the contentWindow as principal and with X-rays disabled
+ // because it enables us to create the APIs object in this sandbox object and then copying it
+ // into the iframe's window, see Bug 1214658 for rationale)
+ this.sandbox = Cu.Sandbox(contentWindow, {
+ sandboxName: `Web-Accessible Extension Page ${this.extension.id}`,
+ sandboxPrototype: contentWindow,
+ sameZoneAs: contentWindow,
+ wantXrays: false,
+ isWebExtensionContentScript: true,
+ });
+ } else {
+ // This metadata is required by the Developer Tools, in order for
+ // the content script to be associated with both the extension and
+ // the tab holding the content page.
+ let metadata = {
+ "inner-window-id": this.innerWindowID,
+ addonId: attrs.addonId,
+ };
+
+ this.sandbox = Cu.Sandbox(principal, {
+ metadata,
+ sandboxName: `Content Script ${this.extension.id}`,
+ sandboxPrototype: contentWindow,
+ sameZoneAs: contentWindow,
+ wantXrays: true,
+ isWebExtensionContentScript: true,
+ wantExportHelpers: true,
+ wantGlobalProperties: ["XMLHttpRequest", "fetch"],
+ originAttributes: attrs,
+ });
+
+ Cu.evalInSandbox(`
+ window.JSON = JSON;
+ window.XMLHttpRequest = XMLHttpRequest;
+ window.fetch = fetch;
+ `, this.sandbox);
+ }
+
+ Object.defineProperty(this, "principal", {
+ value: Cu.getObjectPrincipal(this.sandbox),
+ enumerable: true,
+ configurable: true,
+ });
+
+ this.url = contentWindow.location.href;
+
+ defineLazyGetter(this, "chromeObj", () => {
+ let chromeObj = Cu.createObjectIn(this.sandbox);
+
+ Schemas.inject(chromeObj, this.childManager);
+ return chromeObj;
+ });
+
+ Schemas.exportLazyGetter(this.sandbox, "browser", () => this.chromeObj);
+ Schemas.exportLazyGetter(this.sandbox, "chrome", () => this.chromeObj);
+
+ // This is an iframe with content script API enabled (bug 1214658)
+ if (isExtensionPage) {
+ Schemas.exportLazyGetter(this.contentWindow,
+ "browser", () => this.chromeObj);
+ Schemas.exportLazyGetter(this.contentWindow,
+ "chrome", () => this.chromeObj);
+ }
+ }
+
+ get cloneScope() {
+ return this.sandbox;
+ }
+
+ execute(script, shouldRun, when) {
+ script.tryInject(this.contentWindow, this.sandbox, shouldRun, when);
+ }
+
+ addScript(script, when) {
+ let state = DocumentManager.getWindowState(this.contentWindow);
+ this.execute(script, scheduled => isWhenBeforeOrSame(scheduled, state), when);
+
+ // Save the script in case it has pending operations in later load
+ // states, but only if we're before document_idle, or require cleanup.
+ if (state != "document_idle" || script.requiresCleanup) {
+ this.scripts.push(script);
+ }
+ }
+
+ triggerScripts(documentState) {
+ for (let script of this.scripts) {
+ this.execute(script, scheduled => scheduled == documentState, documentState);
+ }
+ if (documentState == "document_idle") {
+ // Don't bother saving scripts after document_idle.
+ this.scripts = this.scripts.filter(script => script.requiresCleanup);
+ }
+ }
+
+ close() {
+ super.unload();
+
+ if (this.contentWindow) {
+ for (let script of this.scripts) {
+ if (script.requiresCleanup) {
+ script.cleanup(this.contentWindow);
+ }
+ }
+
+ // Overwrite the content script APIs with an empty object if the APIs objects are still
+ // defined in the content window (bug 1214658).
+ if (this.isExtensionPage) {
+ Cu.createObjectIn(this.contentWindow, {defineAs: "browser"});
+ Cu.createObjectIn(this.contentWindow, {defineAs: "chrome"});
+ }
+ }
+ Cu.nukeSandbox(this.sandbox);
+ this.sandbox = null;
+ }
+}
+
+defineLazyGetter(ContentScriptContextChild.prototype, "messenger", function() {
+ // The |sender| parameter is passed directly to the extension.
+ let sender = {id: this.extension.id, frameId: this.frameId, url: this.url};
+ let filter = {extensionId: this.extension.id};
+ let optionalFilter = {frameId: this.frameId};
+
+ return new Messenger(this, [this.messageManager], sender, filter, optionalFilter);
+});
+
+defineLazyGetter(ContentScriptContextChild.prototype, "childManager", function() {
+ let localApis = {};
+ apiManager.generateAPIs(this, localApis);
+
+ let childManager = new ChildAPIManager(this, this.messageManager, localApis, {
+ envType: "content_parent",
+ url: this.url,
+ });
+
+ this.callOnClose(childManager);
+
+ return childManager;
+});
+
+// Responsible for creating ExtensionContexts and injecting content
+// scripts into them when new documents are created.
+DocumentManager = {
+ extensionCount: 0,
+
+ // Map[windowId -> Map[extensionId -> ContentScriptContextChild]]
+ contentScriptWindows: new Map(),
+
+ // Map[windowId -> ContentScriptContextChild]
+ extensionPageWindows: new Map(),
+
+ init() {
+ Services.obs.addObserver(this, "content-document-global-created", false);
+ Services.obs.addObserver(this, "document-element-inserted", false);
+ Services.obs.addObserver(this, "inner-window-destroyed", false);
+ },
+
+ uninit() {
+ Services.obs.removeObserver(this, "content-document-global-created");
+ Services.obs.removeObserver(this, "document-element-inserted");
+ Services.obs.removeObserver(this, "inner-window-destroyed");
+ },
+
+ getWindowState(contentWindow) {
+ let readyState = contentWindow.document.readyState;
+ if (readyState == "complete") {
+ return "document_idle";
+ }
+ if (readyState == "interactive") {
+ return "document_end";
+ }
+ return "document_start";
+ },
+
+ loadInto(window) {
+ // Enable the content script APIs should be available in subframes' window
+ // if it is recognized as a valid addon id (see Bug 1214658 for rationale).
+ const {
+ NO_PRIVILEGES,
+ CONTENTSCRIPT_PRIVILEGES,
+ FULL_PRIVILEGES,
+ } = ExtensionManagement.API_LEVELS;
+ let extensionId = ExtensionManagement.getAddonIdForWindow(window);
+ let apiLevel = ExtensionManagement.getAPILevelForWindow(window, extensionId);
+
+ if (apiLevel != NO_PRIVILEGES) {
+ let extension = ExtensionManager.get(extensionId);
+ if (extension) {
+ if (apiLevel == CONTENTSCRIPT_PRIVILEGES) {
+ DocumentManager.getExtensionPageContext(extension, window);
+ } else if (apiLevel == FULL_PRIVILEGES) {
+ ExtensionChild.createExtensionContext(extension, window);
+ }
+ }
+ }
+ },
+
+ observe: function(subject, topic, data) {
+ // For some types of documents (about:blank), we only see the first
+ // notification, for others (data: URIs) we only observe the second.
+ if (topic == "content-document-global-created" || topic == "document-element-inserted") {
+ let document = subject;
+ let window = document && document.defaultView;
+
+ if (topic == "content-document-global-created") {
+ window = subject;
+ document = window && window.document;
+ }
+
+ if (!document || !document.location || !window) {
+ return;
+ }
+
+ // Make sure we only load into frames that ExtensionContent.init
+ // was called on (i.e., not frames for social or sidebars).
+ let mm = getWindowMessageManager(window);
+ if (!mm || !ExtensionContent.globals.has(mm)) {
+ return;
+ }
+
+ // Load on document-element-inserted, except for about:blank which doesn't
+ // see it, and needs special late handling on DOMContentLoaded event.
+ if (topic === "document-element-inserted") {
+ this.loadInto(window);
+ this.trigger("document_start", window);
+ }
+
+ /* eslint-disable mozilla/balanced-listeners */
+ window.addEventListener("DOMContentLoaded", this, true);
+ window.addEventListener("load", this, true);
+ /* eslint-enable mozilla/balanced-listeners */
+ } else if (topic == "inner-window-destroyed") {
+ let windowId = subject.QueryInterface(Ci.nsISupportsPRUint64).data;
+
+ MessageChannel.abortResponses({innerWindowID: windowId});
+
+ // Close any existent content-script context for the destroyed window.
+ if (this.contentScriptWindows.has(windowId)) {
+ let extensions = this.contentScriptWindows.get(windowId);
+ for (let [, context] of extensions) {
+ context.close();
+ }
+
+ this.contentScriptWindows.delete(windowId);
+ }
+
+ // Close any existent iframe extension page context for the destroyed window.
+ if (this.extensionPageWindows.has(windowId)) {
+ let context = this.extensionPageWindows.get(windowId);
+ context.close();
+ this.extensionPageWindows.delete(windowId);
+ }
+
+ ExtensionChild.destroyExtensionContext(windowId);
+ }
+ },
+
+ handleEvent: function(event) {
+ let window = event.currentTarget;
+ if (event.target != window.document) {
+ // We use capturing listeners so we have precedence over content script
+ // listeners, but only care about events targeted to the element we're
+ // listening on.
+ return;
+ }
+ window.removeEventListener(event.type, this, true);
+
+ // Need to check if we're still on the right page? Greasemonkey does this.
+
+ if (event.type == "DOMContentLoaded") {
+ // By this time, we can be sure if this is an explicit about:blank
+ // document, and if it needs special late loading and fake trigger.
+ if (window.location.href === "about:blank") {
+ this.loadInto(window);
+ this.trigger("document_start", window);
+ }
+ this.trigger("document_end", window);
+ } else if (event.type == "load") {
+ this.trigger("document_idle", window);
+ }
+ },
+
+ // Used to executeScript, insertCSS and removeCSS.
+ executeScript(global, extensionId, options) {
+ let extension = ExtensionManager.get(extensionId);
+
+ let executeInWin = (window) => {
+ let deferred = PromiseUtils.defer();
+ let script = new Script(extension, options, deferred);
+
+ if (script.matches(window)) {
+ let context = this.getContentScriptContext(extension, window);
+ context.addScript(script);
+ return deferred.promise;
+ }
+ return null;
+ };
+
+ let promises = Array.from(this.enumerateWindows(global.docShell), executeInWin)
+ .filter(promise => promise);
+
+ if (!promises.length) {
+ let details = {};
+ for (let key of ["all_frames", "frame_id", "matches_about_blank", "matchesHost"]) {
+ if (key in options) {
+ details[key] = options[key];
+ }
+ }
+
+ return Promise.reject({message: `No window matching ${JSON.stringify(details)}`});
+ }
+ if (!options.all_frames && promises.length > 1) {
+ return Promise.reject({message: `Internal error: Script matched multiple windows`});
+ }
+ return Promise.all(promises);
+ },
+
+ enumerateWindows: function* (docShell) {
+ let window = docShell.QueryInterface(Ci.nsIInterfaceRequestor)
+ .getInterface(Ci.nsIDOMWindow);
+ yield window;
+
+ for (let i = 0; i < docShell.childCount; i++) {
+ let child = docShell.getChildAt(i).QueryInterface(Ci.nsIDocShell);
+ yield* this.enumerateWindows(child);
+ }
+ },
+
+ getContentScriptGlobalsForWindow(window) {
+ let winId = getInnerWindowID(window);
+ let extensions = this.contentScriptWindows.get(winId);
+
+ if (extensions) {
+ return Array.from(extensions.values(), ctx => ctx.sandbox);
+ }
+
+ return [];
+ },
+
+ getContentScriptContext(extension, window) {
+ let winId = getInnerWindowID(window);
+ if (!this.contentScriptWindows.has(winId)) {
+ this.contentScriptWindows.set(winId, new Map());
+ }
+
+ let extensions = this.contentScriptWindows.get(winId);
+ if (!extensions.has(extension.id)) {
+ let context = new ContentScriptContextChild(extension, window);
+ extensions.set(extension.id, context);
+ }
+
+ return extensions.get(extension.id);
+ },
+
+ getExtensionPageContext(extension, window) {
+ let winId = getInnerWindowID(window);
+
+ let context = this.extensionPageWindows.get(winId);
+ if (!context) {
+ let context = new ContentScriptContextChild(extension, window, {isExtensionPage: true});
+ this.extensionPageWindows.set(winId, context);
+ }
+
+ return context;
+ },
+
+ startupExtension(extensionId) {
+ if (this.extensionCount == 0) {
+ this.init();
+ }
+ this.extensionCount++;
+
+ let extension = ExtensionManager.get(extensionId);
+ for (let global of ExtensionContent.globals.keys()) {
+ // Note that we miss windows in the bfcache here. In theory we
+ // could execute content scripts on a pageshow event for that
+ // window, but that seems extreme.
+ for (let window of this.enumerateWindows(global.docShell)) {
+ for (let script of extension.scripts) {
+ if (script.matches(window)) {
+ let context = this.getContentScriptContext(extension, window);
+ context.addScript(script);
+ }
+ }
+ }
+ }
+ },
+
+ shutdownExtension(extensionId) {
+ // Clean up content-script contexts on extension shutdown.
+ for (let [, extensions] of this.contentScriptWindows) {
+ let context = extensions.get(extensionId);
+ if (context) {
+ context.close();
+ extensions.delete(extensionId);
+ }
+ }
+
+ // Clean up iframe extension page contexts on extension shutdown.
+ for (let [winId, context] of this.extensionPageWindows) {
+ if (context.extension.id == extensionId) {
+ context.close();
+ this.extensionPageWindows.delete(winId);
+ }
+ }
+
+ ExtensionChild.shutdownExtension(extensionId);
+
+ MessageChannel.abortResponses({extensionId});
+
+ this.extensionCount--;
+ if (this.extensionCount == 0) {
+ this.uninit();
+ }
+ },
+
+ trigger(when, window) {
+ if (when === "document_start") {
+ for (let extension of ExtensionManager.extensions.values()) {
+ for (let script of extension.scripts) {
+ if (script.matches(window)) {
+ let context = this.getContentScriptContext(extension, window);
+ context.addScript(script, when);
+ }
+ }
+ }
+ } else {
+ let contexts = this.contentScriptWindows.get(getInnerWindowID(window)) || new Map();
+ for (let context of contexts.values()) {
+ context.triggerScripts(when);
+ }
+ }
+ },
+};
+
+// Represents a browser extension in the content process.
+class BrowserExtensionContent extends EventEmitter {
+ constructor(data) {
+ super();
+
+ this.id = data.id;
+ this.uuid = data.uuid;
+ this.data = data;
+ this.instanceId = data.instanceId;
+
+ this.MESSAGE_EMIT_EVENT = `Extension:EmitEvent:${this.instanceId}`;
+ Services.cpmm.addMessageListener(this.MESSAGE_EMIT_EVENT, this);
+
+ this.scripts = data.content_scripts.map(scriptData => new Script(this, scriptData));
+ this.webAccessibleResources = new MatchGlobs(data.webAccessibleResources);
+ this.whiteListedHosts = new MatchPattern(data.whiteListedHosts);
+ this.permissions = data.permissions;
+ this.principal = data.principal;
+
+ this.localeData = new LocaleData(data.localeData);
+
+ this.manifest = data.manifest;
+ this.baseURI = Services.io.newURI(data.baseURL, null, null);
+
+ // Only used in addon processes.
+ this.views = new Set();
+
+ let uri = Services.io.newURI(data.resourceURL, null, null);
+
+ if (Services.appinfo.processType == Services.appinfo.PROCESS_TYPE_CONTENT) {
+ // Extension.jsm takes care of this in the parent.
+ ExtensionManagement.startupExtension(this.uuid, uri, this);
+ }
+ }
+
+ shutdown() {
+ Services.cpmm.removeMessageListener(this.MESSAGE_EMIT_EVENT, this);
+
+ if (Services.appinfo.processType == Services.appinfo.PROCESS_TYPE_CONTENT) {
+ ExtensionManagement.shutdownExtension(this.uuid);
+ }
+ }
+
+ emit(event, ...args) {
+ Services.cpmm.sendAsyncMessage(this.MESSAGE_EMIT_EVENT, {event, args});
+
+ super.emit(event, ...args);
+ }
+
+ receiveMessage({name, data}) {
+ if (name === this.MESSAGE_EMIT_EVENT) {
+ super.emit(data.event, ...data.args);
+ }
+ }
+
+ localizeMessage(...args) {
+ return this.localeData.localizeMessage(...args);
+ }
+
+ localize(...args) {
+ return this.localeData.localize(...args);
+ }
+
+ hasPermission(perm) {
+ let match = /^manifest:(.*)/.exec(perm);
+ if (match) {
+ return this.manifest[match[1]] != null;
+ }
+ return this.permissions.has(perm);
+ }
+}
+
+ExtensionManager = {
+ // Map[extensionId, BrowserExtensionContent]
+ extensions: new Map(),
+
+ init() {
+ Schemas.init();
+ ExtensionChild.initOnce();
+
+ Services.cpmm.addMessageListener("Extension:Startup", this);
+ Services.cpmm.addMessageListener("Extension:Shutdown", this);
+ Services.cpmm.addMessageListener("Extension:FlushJarCache", this);
+
+ if (Services.cpmm.initialProcessData && "Extension:Extensions" in Services.cpmm.initialProcessData) {
+ let extensions = Services.cpmm.initialProcessData["Extension:Extensions"];
+ for (let data of extensions) {
+ this.extensions.set(data.id, new BrowserExtensionContent(data));
+ DocumentManager.startupExtension(data.id);
+ }
+ }
+ },
+
+ get(extensionId) {
+ return this.extensions.get(extensionId);
+ },
+
+ receiveMessage({name, data}) {
+ let extension;
+ switch (name) {
+ case "Extension:Startup": {
+ extension = new BrowserExtensionContent(data);
+
+ this.extensions.set(data.id, extension);
+
+ DocumentManager.startupExtension(data.id);
+
+ Services.cpmm.sendAsyncMessage("Extension:StartupComplete");
+ break;
+ }
+
+ case "Extension:Shutdown": {
+ extension = this.extensions.get(data.id);
+ extension.shutdown();
+
+ DocumentManager.shutdownExtension(data.id);
+
+ this.extensions.delete(data.id);
+ break;
+ }
+
+ case "Extension:FlushJarCache": {
+ let nsIFile = Components.Constructor("@mozilla.org/file/local;1", "nsIFile",
+ "initWithPath");
+ let file = new nsIFile(data.path);
+ flushJarCache(file);
+ Services.cpmm.sendAsyncMessage("Extension:FlushJarCacheComplete");
+ break;
+ }
+ }
+ },
+};
+
+class ExtensionGlobal {
+ constructor(global) {
+ this.global = global;
+
+ MessageChannel.addListener(global, "Extension:Capture", this);
+ MessageChannel.addListener(global, "Extension:DetectLanguage", this);
+ MessageChannel.addListener(global, "Extension:Execute", this);
+ MessageChannel.addListener(global, "WebNavigation:GetFrame", this);
+ MessageChannel.addListener(global, "WebNavigation:GetAllFrames", this);
+
+ this.windowId = global.content
+ .QueryInterface(Ci.nsIInterfaceRequestor)
+ .getInterface(Ci.nsIDOMWindowUtils)
+ .outerWindowID;
+
+ global.sendAsyncMessage("Extension:TopWindowID", {windowId: this.windowId});
+ }
+
+ uninit() {
+ this.global.sendAsyncMessage("Extension:RemoveTopWindowID", {windowId: this.windowId});
+ }
+
+ get messageFilterStrict() {
+ return {
+ innerWindowID: getInnerWindowID(this.global.content),
+ };
+ }
+
+ receiveMessage({target, messageName, recipient, data}) {
+ switch (messageName) {
+ case "Extension:Capture":
+ return this.handleExtensionCapture(data.width, data.height, data.options);
+ case "Extension:DetectLanguage":
+ return this.handleDetectLanguage(target);
+ case "Extension:Execute":
+ return this.handleExtensionExecute(target, recipient.extensionId, data.options);
+ case "WebNavigation:GetFrame":
+ return this.handleWebNavigationGetFrame(data.options);
+ case "WebNavigation:GetAllFrames":
+ return this.handleWebNavigationGetAllFrames();
+ }
+ }
+
+ handleExtensionCapture(width, height, options) {
+ let win = this.global.content;
+
+ const XHTML_NS = "http://www.w3.org/1999/xhtml";
+ let canvas = win.document.createElementNS(XHTML_NS, "canvas");
+ canvas.width = width;
+ canvas.height = height;
+ canvas.mozOpaque = true;
+
+ let ctx = canvas.getContext("2d");
+
+ // We need to scale the image to the visible size of the browser,
+ // in order for the result to appear as the user sees it when
+ // settings like full zoom come into play.
+ ctx.scale(canvas.width / win.innerWidth, canvas.height / win.innerHeight);
+
+ ctx.drawWindow(win, win.scrollX, win.scrollY, win.innerWidth, win.innerHeight, "#fff");
+
+ return canvas.toDataURL(`image/${options.format}`, options.quality / 100);
+ }
+
+ handleDetectLanguage(target) {
+ let doc = target.content.document;
+
+ return promiseDocumentReady(doc).then(() => {
+ let elem = doc.documentElement;
+
+ let language = (elem.getAttribute("xml:lang") || elem.getAttribute("lang") ||
+ doc.contentLanguage || null);
+
+ // We only want the last element of the TLD here.
+ // Only country codes have any effect on the results, but other
+ // values cause no harm.
+ let tld = doc.location.hostname.match(/[a-z]*$/)[0];
+
+ // The CLD2 library used by the language detector is capable of
+ // analyzing raw HTML. Unfortunately, that takes much more memory,
+ // and since it's hosted by emscripten, and therefore can't shrink
+ // its heap after it's grown, it has a performance cost.
+ // So we send plain text instead.
+ let encoder = Cc["@mozilla.org/layout/documentEncoder;1?type=text/plain"].createInstance(Ci.nsIDocumentEncoder);
+ encoder.init(doc, "text/plain", encoder.SkipInvisibleContent);
+ let text = encoder.encodeToStringWithMaxLength(60 * 1024);
+
+ let encoding = doc.characterSet;
+
+ return LanguageDetector.detectLanguage({language, tld, text, encoding})
+ .then(result => result.language === "un" ? "und" : result.language);
+ });
+ }
+
+ // Used to executeScript, insertCSS and removeCSS.
+ handleExtensionExecute(target, extensionId, options) {
+ return DocumentManager.executeScript(target, extensionId, options).then(result => {
+ try {
+ // Make sure we can structured-clone the result value before
+ // we try to send it back over the message manager.
+ Cu.cloneInto(result, target);
+ } catch (e) {
+ return Promise.reject({message: "Script returned non-structured-clonable data"});
+ }
+ return result;
+ });
+ }
+
+ handleWebNavigationGetFrame({frameId}) {
+ return WebNavigationFrames.getFrame(this.global.docShell, frameId);
+ }
+
+ handleWebNavigationGetAllFrames() {
+ return WebNavigationFrames.getAllFrames(this.global.docShell);
+ }
+}
+
+this.ExtensionContent = {
+ globals: new Map(),
+
+ init(global) {
+ this.globals.set(global, new ExtensionGlobal(global));
+ ExtensionChild.init(global);
+ },
+
+ uninit(global) {
+ ExtensionChild.uninit(global);
+ this.globals.get(global).uninit();
+ this.globals.delete(global);
+ },
+
+ // This helper is exported to be integrated in the devtools RDP actors,
+ // that can use it to retrieve the existent WebExtensions ContentScripts
+ // of a target window and be able to show the ContentScripts source in the
+ // DevTools Debugger panel.
+ getContentScriptGlobalsForWindow(window) {
+ return DocumentManager.getContentScriptGlobalsForWindow(window);
+ },
+};
+
+ExtensionManager.init();