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709 lines
22 KiB
JavaScript
709 lines
22 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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let Cu = Components.utils;
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let Ci = Components.interfaces;
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let Cc = Components.classes;
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let Cr = Components.results;
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/* BrowserElementParent injects script to listen for certain events in the
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* child. We then listen to messages from the child script and take
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* appropriate action here in the parent.
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*/
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this.EXPORTED_SYMBOLS = ["BrowserElementParentBuilder"];
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Cu.import("resource://gre/modules/Services.jsm");
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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Cu.import("resource://gre/modules/BrowserElementPromptService.jsm");
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XPCOMUtils.defineLazyGetter(this, "DOMApplicationRegistry", function () {
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Cu.import("resource://gre/modules/Webapps.jsm");
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return DOMApplicationRegistry;
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});
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const TOUCH_EVENTS_ENABLED_PREF = "dom.w3c_touch_events.enabled";
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function debug(msg) {
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//dump("BrowserElementParent.jsm - " + msg + "\n");
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}
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function getIntPref(prefName, def) {
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try {
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return Services.prefs.getIntPref(prefName);
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}
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catch(err) {
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return def;
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}
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}
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function exposeAll(obj) {
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// Filter for Objects and Arrays.
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if (typeof obj !== "object" || !obj)
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return;
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// Recursively expose our children.
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Object.keys(obj).forEach(function(key) {
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exposeAll(obj[key]);
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});
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// If we're not an Array, generate an __exposedProps__ object for ourselves.
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if (obj instanceof Array)
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return;
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var exposed = {};
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Object.keys(obj).forEach(function(key) {
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exposed[key] = 'rw';
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});
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obj.__exposedProps__ = exposed;
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}
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function defineAndExpose(obj, name, value) {
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obj[name] = value;
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if (!('__exposedProps__' in obj))
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obj.__exposedProps__ = {};
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obj.__exposedProps__[name] = 'r';
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}
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function visibilityChangeHandler(e) {
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// The visibilitychange event's target is the document.
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let win = e.target.defaultView;
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if (!win._browserElementParents) {
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return;
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}
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let beps = Cu.nondeterministicGetWeakMapKeys(win._browserElementParents);
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if (beps.length == 0) {
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win.removeEventListener('visibilitychange', visibilityChangeHandler);
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return;
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}
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for (let i = 0; i < beps.length; i++) {
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beps[i]._ownerVisibilityChange();
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}
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}
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this.BrowserElementParentBuilder = {
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create: function create(frameLoader, hasRemoteFrame) {
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return new BrowserElementParent(frameLoader, hasRemoteFrame);
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}
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}
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// The active input method iframe.
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let activeInputFrame = null;
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function BrowserElementParent(frameLoader, hasRemoteFrame) {
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debug("Creating new BrowserElementParent object for " + frameLoader);
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this._domRequestCounter = 0;
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this._pendingDOMRequests = {};
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this._hasRemoteFrame = hasRemoteFrame;
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this._nextPaintListeners = [];
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this._frameLoader = frameLoader;
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this._frameElement = frameLoader.QueryInterface(Ci.nsIFrameLoader).ownerElement;
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if (!this._frameElement) {
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debug("No frame element?");
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return;
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}
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this._mm = frameLoader.messageManager;
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let self = this;
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// Messages we receive are handed to functions which take a (data) argument,
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// where |data| is the message manager's data object.
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// We use a single message and dispatch to various function based
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// on data.msg_name
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let mmCalls = {
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"hello": this._recvHello,
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"contextmenu": this._fireCtxMenuEvent,
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"locationchange": this._fireEventFromMsg,
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"loadstart": this._fireEventFromMsg,
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"loadend": this._fireEventFromMsg,
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"titlechange": this._fireEventFromMsg,
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"iconchange": this._fireEventFromMsg,
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"close": this._fireEventFromMsg,
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"resize": this._fireEventFromMsg,
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"opensearch": this._fireEventFromMsg,
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"securitychange": this._fireEventFromMsg,
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"error": this._fireEventFromMsg,
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"scroll": this._fireEventFromMsg,
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"firstpaint": this._fireEventFromMsg,
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"documentfirstpaint": this._fireEventFromMsg,
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"nextpaint": this._recvNextPaint,
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"keyevent": this._fireKeyEvent,
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"showmodalprompt": this._handleShowModalPrompt,
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"got-purge-history": this._gotDOMRequestResult,
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"got-screenshot": this._gotDOMRequestResult,
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"got-can-go-back": this._gotDOMRequestResult,
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"got-can-go-forward": this._gotDOMRequestResult,
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"fullscreen-origin-change": this._remoteFullscreenOriginChange,
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"rollback-fullscreen": this._remoteFrameFullscreenReverted,
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"exit-fullscreen": this._exitFullscreen,
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"got-visible": this._gotDOMRequestResult,
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"visibilitychange": this._childVisibilityChange,
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"got-set-input-method-active": this._gotDOMRequestResult
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}
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this._mm.addMessageListener('browser-element-api:call', function(aMsg) {
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if (self._isAlive() && (aMsg.data.msg_name in mmCalls)) {
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return mmCalls[aMsg.data.msg_name].apply(self, arguments);
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}
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});
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Services.obs.addObserver(this, 'ask-children-to-exit-fullscreen', /* ownsWeak = */ true);
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Services.obs.addObserver(this, 'oop-frameloader-crashed', /* ownsWeak = */ true);
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let defineMethod = function(name, fn) {
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XPCNativeWrapper.unwrap(self._frameElement)[name] = function() {
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if (self._isAlive()) {
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return fn.apply(self, arguments);
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}
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};
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}
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let defineDOMRequestMethod = function(domName, msgName) {
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XPCNativeWrapper.unwrap(self._frameElement)[domName] = function() {
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if (self._isAlive()) {
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return self._sendDOMRequest(msgName);
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}
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};
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}
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// Define methods on the frame element.
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defineMethod('setVisible', this._setVisible);
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defineDOMRequestMethod('getVisible', 'get-visible');
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defineMethod('sendMouseEvent', this._sendMouseEvent);
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// 0 = disabled, 1 = enabled, 2 - auto detect
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if (getIntPref(TOUCH_EVENTS_ENABLED_PREF, 0) != 0) {
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defineMethod('sendTouchEvent', this._sendTouchEvent);
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}
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defineMethod('goBack', this._goBack);
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defineMethod('goForward', this._goForward);
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defineMethod('reload', this._reload);
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defineMethod('stop', this._stop);
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defineMethod('purgeHistory', this._purgeHistory);
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defineMethod('getScreenshot', this._getScreenshot);
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defineMethod('addNextPaintListener', this._addNextPaintListener);
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defineMethod('removeNextPaintListener', this._removeNextPaintListener);
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defineDOMRequestMethod('getCanGoBack', 'get-can-go-back');
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defineDOMRequestMethod('getCanGoForward', 'get-can-go-forward');
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let principal = this._frameElement.ownerDocument.nodePrincipal;
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let perm = Services.perms
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.testExactPermissionFromPrincipal(principal, "inputmethod-manage");
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if (perm === Ci.nsIPermissionManager.ALLOW_ACTION) {
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defineMethod('setInputMethodActive', this._setInputMethodActive);
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}
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// Listen to visibilitychange on the iframe's owner window, and forward
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// changes down to the child. We want to do this while registering as few
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// visibilitychange listeners on _window as possible, because such a listener
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// may live longer than this BrowserElementParent object.
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//
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// To accomplish this, we register just one listener on the window, and have
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// it reference a WeakMap whose keys are all the BrowserElementParent objects
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// on the window. Then when the listener fires, we iterate over the
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// WeakMap's keys (which we can do, because we're chrome) to notify the
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// BrowserElementParents.
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if (!this._window._browserElementParents) {
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this._window._browserElementParents = new WeakMap();
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this._window.addEventListener('visibilitychange',
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visibilityChangeHandler,
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/* useCapture = */ false,
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/* wantsUntrusted = */ false);
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}
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this._window._browserElementParents.set(this, null);
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// Insert ourself into the prompt service.
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BrowserElementPromptService.mapFrameToBrowserElementParent(this._frameElement, this);
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// If this browser represents an app then let the Webapps module register for
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// any messages that it needs.
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let appManifestURL =
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this._frameElement.QueryInterface(Ci.nsIMozBrowserFrame).appManifestURL;
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if (appManifestURL) {
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let appId =
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DOMApplicationRegistry.getAppLocalIdByManifestURL(appManifestURL);
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if (appId != Ci.nsIScriptSecurityManager.NO_APP_ID) {
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DOMApplicationRegistry.registerBrowserElementParentForApp(this, appId);
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}
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}
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}
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BrowserElementParent.prototype = {
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QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver,
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Ci.nsISupportsWeakReference]),
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/**
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* You shouldn't touch this._frameElement or this._window if _isAlive is
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* false. (You'll likely get an exception if you do.)
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*/
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_isAlive: function() {
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return !Cu.isDeadWrapper(this._frameElement) &&
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!Cu.isDeadWrapper(this._frameElement.ownerDocument) &&
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!Cu.isDeadWrapper(this._frameElement.ownerDocument.defaultView);
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},
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get _window() {
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return this._frameElement.ownerDocument.defaultView;
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},
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get _windowUtils() {
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return this._window.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIDOMWindowUtils);
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},
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promptAuth: function(authDetail, callback) {
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let evt;
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let self = this;
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let callbackCalled = false;
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let cancelCallback = function() {
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if (!callbackCalled) {
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callbackCalled = true;
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callback(false, null, null);
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}
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};
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if (authDetail.isOnlyPassword) {
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// We don't handle password-only prompts, so just cancel it.
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cancelCallback();
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return;
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} else { /* username and password */
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let detail = {
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host: authDetail.host,
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realm: authDetail.realm
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};
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evt = this._createEvent('usernameandpasswordrequired', detail,
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/* cancelable */ true);
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defineAndExpose(evt.detail, 'authenticate', function(username, password) {
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if (callbackCalled)
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return;
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callbackCalled = true;
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callback(true, username, password);
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});
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}
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defineAndExpose(evt.detail, 'cancel', function() {
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cancelCallback();
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});
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this._frameElement.dispatchEvent(evt);
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if (!evt.defaultPrevented) {
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cancelCallback();
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}
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},
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_sendAsyncMsg: function(msg, data) {
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try {
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if (!data) {
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data = { };
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}
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data.msg_name = msg;
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this._mm.sendAsyncMessage('browser-element-api:call', data);
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} catch (e) {
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return false;
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}
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return true;
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},
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_recvHello: function(data) {
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debug("recvHello");
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// Inform our child if our owner element's document is invisible. Note
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// that we must do so here, rather than in the BrowserElementParent
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// constructor, because the BrowserElementChild may not be initialized when
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// we run our constructor.
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if (this._window.document.hidden) {
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this._ownerVisibilityChange();
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}
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return {
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name: this._frameElement.getAttribute('name'),
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fullscreenAllowed:
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this._frameElement.hasAttribute('allowfullscreen') ||
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this._frameElement.hasAttribute('mozallowfullscreen')
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}
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},
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_fireCtxMenuEvent: function(data) {
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let detail = data.json;
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let evtName = detail.msg_name;
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debug('fireCtxMenuEventFromMsg: ' + evtName + ' ' + detail);
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let evt = this._createEvent(evtName, detail, /* cancellable */ true);
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if (detail.contextmenu) {
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var self = this;
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defineAndExpose(evt.detail, 'contextMenuItemSelected', function(id) {
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self._sendAsyncMsg('fire-ctx-callback', {menuitem: id});
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});
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}
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// The embedder may have default actions on context menu events, so
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// we fire a context menu event even if the child didn't define a
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// custom context menu
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return !this._frameElement.dispatchEvent(evt);
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},
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/**
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* Fire either a vanilla or a custom event, depending on the contents of
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* |data|.
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*/
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_fireEventFromMsg: function(data) {
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let detail = data.json;
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let name = detail.msg_name;
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// For events that send a "_payload_" property, we just want to transmit
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// this in the event.
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if ("_payload_" in detail) {
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detail = detail._payload_;
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}
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debug('fireEventFromMsg: ' + name + ', ' + JSON.stringify(detail));
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let evt = this._createEvent(name, detail,
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/* cancelable = */ false);
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this._frameElement.dispatchEvent(evt);
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},
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_handleShowModalPrompt: function(data) {
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// Fire a showmodalprmopt event on the iframe. When this method is called,
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// the child is spinning in a nested event loop waiting for an
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// unblock-modal-prompt message.
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//
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// If the embedder calls preventDefault() on the showmodalprompt event,
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// we'll block the child until event.detail.unblock() is called.
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//
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// Otherwise, if preventDefault() is not called, we'll send the
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// unblock-modal-prompt message to the child as soon as the event is done
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// dispatching.
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let detail = data.json;
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debug('handleShowPrompt ' + JSON.stringify(detail));
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// Strip off the windowID property from the object we send along in the
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// event.
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let windowID = detail.windowID;
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delete detail.windowID;
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debug("Event will have detail: " + JSON.stringify(detail));
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let evt = this._createEvent('showmodalprompt', detail,
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/* cancelable = */ true);
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let self = this;
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let unblockMsgSent = false;
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function sendUnblockMsg() {
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if (unblockMsgSent) {
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return;
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}
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unblockMsgSent = true;
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// We don't need to sanitize evt.detail.returnValue (e.g. converting the
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// return value of confirm() to a boolean); Gecko does that for us.
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let data = { windowID: windowID,
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returnValue: evt.detail.returnValue };
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self._sendAsyncMsg('unblock-modal-prompt', data);
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}
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defineAndExpose(evt.detail, 'unblock', function() {
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sendUnblockMsg();
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});
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this._frameElement.dispatchEvent(evt);
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if (!evt.defaultPrevented) {
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// Unblock the inner frame immediately. Otherwise we'll unblock upon
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// evt.detail.unblock().
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sendUnblockMsg();
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}
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},
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_createEvent: function(evtName, detail, cancelable) {
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// This will have to change if we ever want to send a CustomEvent with null
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// detail. For now, it's OK.
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if (detail !== undefined && detail !== null) {
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exposeAll(detail);
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return new this._window.CustomEvent('mozbrowser' + evtName,
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{ bubbles: true,
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cancelable: cancelable,
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detail: detail });
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}
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return new this._window.Event('mozbrowser' + evtName,
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{ bubbles: true,
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cancelable: cancelable });
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},
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/**
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* Kick off a DOMRequest in the child process.
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*
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* We'll fire an event called |msgName| on the child process, passing along
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* an object with two fields:
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*
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* - id: the ID of this request.
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* - arg: arguments to pass to the child along with this request.
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*
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* We expect the child to pass the ID back to us upon completion of the
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* request. See _gotDOMRequestResult.
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*/
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_sendDOMRequest: function(msgName, args) {
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let id = 'req_' + this._domRequestCounter++;
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let req = Services.DOMRequest.createRequest(this._window);
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if (this._sendAsyncMsg(msgName, {id: id, args: args})) {
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this._pendingDOMRequests[id] = req;
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} else {
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Services.DOMRequest.fireErrorAsync(req, "fail");
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}
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return req;
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},
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/**
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* Called when the child process finishes handling a DOMRequest. data.json
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* must have the fields [id, successRv], if the DOMRequest was successful, or
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* [id, errorMsg], if the request was not successful.
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*
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* The fields have the following meanings:
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*
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* - id: the ID of the DOM request (see _sendDOMRequest)
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* - successRv: the request's return value, if the request succeeded
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* - errorMsg: the message to pass to DOMRequest.fireError(), if the request
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* failed.
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*
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*/
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_gotDOMRequestResult: function(data) {
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let req = this._pendingDOMRequests[data.json.id];
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delete this._pendingDOMRequests[data.json.id];
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if ('successRv' in data.json) {
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debug("Successful gotDOMRequestResult.");
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Services.DOMRequest.fireSuccess(req, data.json.successRv);
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}
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else {
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debug("Got error in gotDOMRequestResult.");
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Services.DOMRequest.fireErrorAsync(req, data.json.errorMsg);
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}
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},
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_setVisible: function(visible) {
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this._sendAsyncMsg('set-visible', {visible: visible});
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this._frameLoader.visible = visible;
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},
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_sendMouseEvent: function(type, x, y, button, clickCount, modifiers) {
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this._sendAsyncMsg("send-mouse-event", {
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"type": type,
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"x": x,
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"y": y,
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"button": button,
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"clickCount": clickCount,
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"modifiers": modifiers
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});
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},
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_sendTouchEvent: function(type, identifiers, touchesX, touchesY,
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radiisX, radiisY, rotationAngles, forces,
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count, modifiers) {
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this._sendAsyncMsg("send-touch-event", {
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"type": type,
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"identifiers": identifiers,
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"touchesX": touchesX,
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"touchesY": touchesY,
|
|
"radiisX": radiisX,
|
|
"radiisY": radiisY,
|
|
"rotationAngles": rotationAngles,
|
|
"forces": forces,
|
|
"count": count,
|
|
"modifiers": modifiers
|
|
});
|
|
},
|
|
|
|
_goBack: function() {
|
|
this._sendAsyncMsg('go-back');
|
|
},
|
|
|
|
_goForward: function() {
|
|
this._sendAsyncMsg('go-forward');
|
|
},
|
|
|
|
_reload: function(hardReload) {
|
|
this._sendAsyncMsg('reload', {hardReload: hardReload});
|
|
},
|
|
|
|
_stop: function() {
|
|
this._sendAsyncMsg('stop');
|
|
},
|
|
|
|
_purgeHistory: function() {
|
|
return this._sendDOMRequest('purge-history');
|
|
},
|
|
|
|
_getScreenshot: function(_width, _height) {
|
|
let width = parseInt(_width);
|
|
let height = parseInt(_height);
|
|
if (isNaN(width) || isNaN(height) || width < 0 || height < 0) {
|
|
throw Components.Exception("Invalid argument",
|
|
Cr.NS_ERROR_INVALID_ARG);
|
|
}
|
|
|
|
return this._sendDOMRequest('get-screenshot',
|
|
{width: width, height: height});
|
|
},
|
|
|
|
_recvNextPaint: function(data) {
|
|
let listeners = this._nextPaintListeners;
|
|
this._nextPaintListeners = [];
|
|
for (let listener of listeners) {
|
|
try {
|
|
listener();
|
|
} catch (e) {
|
|
// If a listener throws we'll continue.
|
|
}
|
|
}
|
|
},
|
|
|
|
_addNextPaintListener: function(listener) {
|
|
if (typeof listener != 'function')
|
|
throw Components.Exception("Invalid argument", Cr.NS_ERROR_INVALID_ARG);
|
|
|
|
if (this._nextPaintListeners.push(listener) == 1)
|
|
this._sendAsyncMsg('activate-next-paint-listener');
|
|
},
|
|
|
|
_removeNextPaintListener: function(listener) {
|
|
if (typeof listener != 'function')
|
|
throw Components.Exception("Invalid argument", Cr.NS_ERROR_INVALID_ARG);
|
|
|
|
for (let i = this._nextPaintListeners.length - 1; i >= 0; i--) {
|
|
if (this._nextPaintListeners[i] == listener) {
|
|
this._nextPaintListeners.splice(i, 1);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (this._nextPaintListeners.length == 0)
|
|
this._sendAsyncMsg('deactivate-next-paint-listener');
|
|
},
|
|
|
|
_setInputMethodActive: function(isActive) {
|
|
if (typeof isActive !== 'boolean') {
|
|
throw Components.Exception("Invalid argument",
|
|
Cr.NS_ERROR_INVALID_ARG);
|
|
}
|
|
|
|
let req = Services.DOMRequest.createRequest(this._window);
|
|
|
|
// Deactivate the old input method if needed.
|
|
if (activeInputFrame && isActive) {
|
|
let reqOld = XPCNativeWrapper.unwrap(activeInputFrame)
|
|
.setInputMethodActive(false);
|
|
reqOld.onsuccess = function() {
|
|
activeInputFrame = null;
|
|
this._sendSetInputMethodActiveDOMRequest(req, isActive);
|
|
}.bind(this);
|
|
reqOld.onerror = function() {
|
|
Services.DOMRequest.fireErrorAsync(req,
|
|
'Failed to deactivate the old input method: ' +
|
|
reqOld.error + '.');
|
|
};
|
|
} else {
|
|
this._sendSetInputMethodActiveDOMRequest(req, isActive);
|
|
}
|
|
return req;
|
|
},
|
|
|
|
_sendSetInputMethodActiveDOMRequest: function(req, isActive) {
|
|
let id = 'req_' + this._domRequestCounter++;
|
|
let data = {
|
|
id : id,
|
|
args: { isActive: isActive }
|
|
};
|
|
if (this._sendAsyncMsg('set-input-method-active', data)) {
|
|
activeInputFrame = this._frameElement;
|
|
this._pendingDOMRequests[id] = req;
|
|
} else {
|
|
Services.DOMRequest.fireErrorAsync(req, 'fail');
|
|
}
|
|
},
|
|
|
|
_fireKeyEvent: function(data) {
|
|
let evt = this._window.document.createEvent("KeyboardEvent");
|
|
evt.initKeyEvent(data.json.type, true, true, this._window,
|
|
false, false, false, false, // modifiers
|
|
data.json.keyCode,
|
|
data.json.charCode);
|
|
|
|
this._frameElement.dispatchEvent(evt);
|
|
},
|
|
|
|
/**
|
|
* Called when the visibility of the window which owns this iframe changes.
|
|
*/
|
|
_ownerVisibilityChange: function() {
|
|
this._sendAsyncMsg('owner-visibility-change',
|
|
{visible: !this._window.document.hidden});
|
|
},
|
|
|
|
/*
|
|
* Called when the child notices that its visibility has changed.
|
|
*
|
|
* This is sometimes redundant; for example, the child's visibility may
|
|
* change in response to a setVisible request that we made here! But it's
|
|
* not always redundant; for example, the child's visibility may change in
|
|
* response to its parent docshell being hidden.
|
|
*/
|
|
_childVisibilityChange: function(data) {
|
|
debug("_childVisibilityChange(" + data.json.visible + ")");
|
|
this._frameLoader.visible = data.json.visible;
|
|
|
|
this._fireEventFromMsg(data);
|
|
},
|
|
|
|
_exitFullscreen: function() {
|
|
this._windowUtils.exitFullscreen();
|
|
},
|
|
|
|
_remoteFullscreenOriginChange: function(data) {
|
|
let origin = data.json._payload_;
|
|
this._windowUtils.remoteFrameFullscreenChanged(this._frameElement, origin);
|
|
},
|
|
|
|
_remoteFrameFullscreenReverted: function(data) {
|
|
this._windowUtils.remoteFrameFullscreenReverted();
|
|
},
|
|
|
|
_fireFatalError: function() {
|
|
let evt = this._createEvent('error', {type: 'fatal'},
|
|
/* cancelable = */ false);
|
|
this._frameElement.dispatchEvent(evt);
|
|
},
|
|
|
|
observe: function(subject, topic, data) {
|
|
switch(topic) {
|
|
case 'oop-frameloader-crashed':
|
|
if (this._isAlive() && subject == this._frameLoader) {
|
|
this._fireFatalError();
|
|
}
|
|
break;
|
|
case 'ask-children-to-exit-fullscreen':
|
|
if (this._isAlive() &&
|
|
this._frameElement.ownerDocument == subject &&
|
|
this._hasRemoteFrame) {
|
|
this._sendAsyncMsg('exit-fullscreen');
|
|
}
|
|
break;
|
|
default:
|
|
debug('Unknown topic: ' + topic);
|
|
break;
|
|
};
|
|
},
|
|
};
|