mirror of
https://github.com/mozilla/gecko-dev.git
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1035 lines
34 KiB
JavaScript
1035 lines
34 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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dump("######################## BrowserElementChildPreload.js loaded\n");
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var BrowserElementIsReady = false;
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let { classes: Cc, interfaces: Ci, results: Cr, utils: Cu } = Components;
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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Cu.import("resource://gre/modules/Services.jsm");
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Cu.import("resource://gre/modules/BrowserElementPromptService.jsm");
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// Event whitelisted for bubbling.
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let whitelistedEvents = [
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Ci.nsIDOMKeyEvent.DOM_VK_ESCAPE, // Back button.
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Ci.nsIDOMKeyEvent.DOM_VK_SLEEP, // Power button.
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Ci.nsIDOMKeyEvent.DOM_VK_CONTEXT_MENU,
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Ci.nsIDOMKeyEvent.DOM_VK_F5, // Search button.
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Ci.nsIDOMKeyEvent.DOM_VK_PAGE_UP, // Volume up.
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Ci.nsIDOMKeyEvent.DOM_VK_PAGE_DOWN // Volume down.
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];
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function debug(msg) {
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//dump("BrowserElementChildPreload - " + msg + "\n");
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}
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function sendAsyncMsg(msg, data) {
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// Ensure that we don't send any messages before BrowserElementChild.js
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// finishes loading.
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if (!BrowserElementIsReady)
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return;
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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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sendAsyncMessage('browser-element-api:call', data);
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}
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function sendSyncMsg(msg, data) {
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// Ensure that we don't send any messages before BrowserElementChild.js
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// finishes loading.
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if (!BrowserElementIsReady)
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return;
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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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return sendSyncMessage('browser-element-api:call', data);
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}
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let CERTIFICATE_ERROR_PAGE_PREF = 'security.alternate_certificate_error_page';
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let NS_ERROR_MODULE_BASE_OFFSET = 0x45;
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let NS_ERROR_MODULE_SECURITY= 21;
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function NS_ERROR_GET_MODULE(err) {
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return ((((err) >> 16) - NS_ERROR_MODULE_BASE_OFFSET) & 0x1fff)
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}
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function NS_ERROR_GET_CODE(err) {
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return ((err) & 0xffff);
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}
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let SEC_ERROR_BASE = Ci.nsINSSErrorsService.NSS_SEC_ERROR_BASE;
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let SEC_ERROR_UNKNOWN_ISSUER = (SEC_ERROR_BASE + 13);
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let SEC_ERROR_CA_CERT_INVALID = (SEC_ERROR_BASE + 36);
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let SEC_ERROR_UNTRUSTED_ISSUER = (SEC_ERROR_BASE + 20);
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let SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE = (SEC_ERROR_BASE + 30);
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let SEC_ERROR_UNTRUSTED_CERT = (SEC_ERROR_BASE + 21);
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let SEC_ERROR_INADEQUATE_KEY_USAGE = (SEC_ERROR_BASE + 90);
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let SEC_ERROR_EXPIRED_CERTIFICATE = (SEC_ERROR_BASE + 11);
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let SEC_ERROR_CERT_SIGNATURE_ALGORITHM_DISABLED = (SEC_ERROR_BASE + 176);
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let SSL_ERROR_BASE = Ci.nsINSSErrorsService.NSS_SSL_ERROR_BASE;
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let SSL_ERROR_BAD_CERT_DOMAIN = (SSL_ERROR_BASE + 12);
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function getErrorClass(errorCode) {
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let NSPRCode = -1 * NS_ERROR_GET_CODE(errorCode);
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switch (NSPRCode) {
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case SEC_ERROR_UNKNOWN_ISSUER:
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case SEC_ERROR_CA_CERT_INVALID:
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case SEC_ERROR_UNTRUSTED_ISSUER:
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case SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE:
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case SEC_ERROR_UNTRUSTED_CERT:
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case SEC_ERROR_INADEQUATE_KEY_USAGE:
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case SSL_ERROR_BAD_CERT_DOMAIN:
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case SEC_ERROR_EXPIRED_CERTIFICATE:
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case SEC_ERROR_CERT_SIGNATURE_ALGORITHM_DISABLED:
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return Ci.nsINSSErrorsService.ERROR_CLASS_BAD_CERT;
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default:
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return Ci.nsINSSErrorsService.ERROR_CLASS_SSL_PROTOCOL;
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}
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return null;
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}
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/**
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* The BrowserElementChild implements one half of <iframe mozbrowser>.
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* (The other half is, unsurprisingly, BrowserElementParent.)
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*
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* This script is injected into an <iframe mozbrowser> via
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* nsIMessageManager::LoadFrameScript().
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*
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* Our job here is to listen for events within this frame and bubble them up to
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* the parent process.
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*/
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var global = this;
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function BrowserElementChild() {
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// Maps outer window id --> weak ref to window. Used by modal dialog code.
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this._windowIDDict = {};
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// _forcedVisible corresponds to the visibility state our owner has set on us
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// (via iframe.setVisible). ownerVisible corresponds to whether the docShell
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// whose window owns this element is visible.
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//
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// Our docShell is visible iff _forcedVisible and _ownerVisible are both
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// true.
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this._forcedVisible = true;
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this._ownerVisible = true;
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this._nextPaintHandler = null;
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this._init();
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};
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BrowserElementChild.prototype = {
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QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver,
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Ci.nsISupportsWeakReference]),
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_init: function() {
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debug("Starting up.");
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BrowserElementPromptService.mapWindowToBrowserElementChild(content, this);
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docShell.QueryInterface(Ci.nsIWebProgress)
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.addProgressListener(this._progressListener,
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Ci.nsIWebProgress.NOTIFY_LOCATION |
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Ci.nsIWebProgress.NOTIFY_SECURITY |
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Ci.nsIWebProgress.NOTIFY_STATE_WINDOW);
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docShell.QueryInterface(Ci.nsIWebNavigation)
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.sessionHistory = Cc["@mozilla.org/browser/shistory;1"]
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.createInstance(Ci.nsISHistory);
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// This is necessary to get security web progress notifications.
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var securityUI = Cc['@mozilla.org/secure_browser_ui;1']
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.createInstance(Ci.nsISecureBrowserUI);
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securityUI.init(content);
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// A cache of the menuitem dom objects keyed by the id we generate
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// and pass to the embedder
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this._ctxHandlers = {};
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// Counter of contextmenu events fired
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this._ctxCounter = 0;
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this._shuttingDown = false;
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addEventListener('DOMTitleChanged',
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this._titleChangedHandler.bind(this),
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/* useCapture = */ true,
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/* wantsUntrusted = */ false);
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addEventListener('DOMLinkAdded',
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this._linkAddedHandler.bind(this),
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/* useCapture = */ true,
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/* wantsUntrusted = */ false);
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// This listens to unload events from our message manager, but /not/ from
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// the |content| window. That's because the window's unload event doesn't
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// bubble, and we're not using a capturing listener. If we'd used
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// useCapture == true, we /would/ hear unload events from the window, which
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// is not what we want!
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addEventListener('unload',
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this._unloadHandler.bind(this),
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/* useCapture = */ false,
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/* wantsUntrusted = */ false);
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// Registers a MozAfterPaint handler for the very first paint.
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this._addMozAfterPaintHandler(function () {
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sendAsyncMsg('firstpaint');
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});
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let self = this;
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let mmCalls = {
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"purge-history": this._recvPurgeHistory,
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"get-screenshot": this._recvGetScreenshot,
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"set-visible": this._recvSetVisible,
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"get-visible": this._recvVisible,
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"send-mouse-event": this._recvSendMouseEvent,
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"send-touch-event": this._recvSendTouchEvent,
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"get-can-go-back": this._recvCanGoBack,
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"get-can-go-forward": this._recvCanGoForward,
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"go-back": this._recvGoBack,
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"go-forward": this._recvGoForward,
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"reload": this._recvReload,
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"stop": this._recvStop,
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"unblock-modal-prompt": this._recvStopWaiting,
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"fire-ctx-callback": this._recvFireCtxCallback,
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"owner-visibility-change": this._recvOwnerVisibilityChange,
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"exit-fullscreen": this._recvExitFullscreen.bind(this),
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"activate-next-paint-listener": this._activateNextPaintListener.bind(this),
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"set-input-method-active": this._recvSetInputMethodActive.bind(this),
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"deactivate-next-paint-listener": this._deactivateNextPaintListener.bind(this)
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}
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addMessageListener("browser-element-api:call", function(aMessage) {
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if (aMessage.data.msg_name in mmCalls) {
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return mmCalls[aMessage.data.msg_name].apply(self, arguments);
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}
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});
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let els = Cc["@mozilla.org/eventlistenerservice;1"]
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.getService(Ci.nsIEventListenerService);
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// We are using the system group for those events so if something in the
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// content called .stopPropagation() this will still be called.
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els.addSystemEventListener(global, 'keydown',
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this._keyEventHandler.bind(this),
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/* useCapture = */ true);
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els.addSystemEventListener(global, 'keypress',
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this._keyEventHandler.bind(this),
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/* useCapture = */ true);
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els.addSystemEventListener(global, 'keyup',
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this._keyEventHandler.bind(this),
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/* useCapture = */ true);
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els.addSystemEventListener(global, 'DOMWindowClose',
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this._windowCloseHandler.bind(this),
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/* useCapture = */ false);
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els.addSystemEventListener(global, 'DOMWindowCreated',
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this._windowCreatedHandler.bind(this),
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/* useCapture = */ true);
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els.addSystemEventListener(global, 'DOMWindowResize',
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this._windowResizeHandler.bind(this),
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/* useCapture = */ false);
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els.addSystemEventListener(global, 'contextmenu',
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this._contextmenuHandler.bind(this),
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/* useCapture = */ false);
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els.addSystemEventListener(global, 'scroll',
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this._scrollEventHandler.bind(this),
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/* useCapture = */ false);
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Services.obs.addObserver(this,
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"fullscreen-origin-change",
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/* ownsWeak = */ true);
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Services.obs.addObserver(this,
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'ask-parent-to-exit-fullscreen',
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/* ownsWeak = */ true);
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Services.obs.addObserver(this,
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'ask-parent-to-rollback-fullscreen',
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/* ownsWeak = */ true);
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Services.obs.addObserver(this,
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'xpcom-shutdown',
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/* ownsWeak = */ true);
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},
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observe: function(subject, topic, data) {
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// Ignore notifications not about our document. (Note that |content| /can/
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// be null; see bug 874900.)
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if (!content || subject != content.document)
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return;
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switch (topic) {
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case 'fullscreen-origin-change':
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sendAsyncMsg('fullscreen-origin-change', { _payload_: data });
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break;
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case 'ask-parent-to-exit-fullscreen':
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sendAsyncMsg('exit-fullscreen');
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break;
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case 'ask-parent-to-rollback-fullscreen':
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sendAsyncMsg('rollback-fullscreen');
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break;
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case 'xpcom-shutdown':
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this._shuttingDown = true;
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break;
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}
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},
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/**
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* Called when our TabChildGlobal starts to die. This is not called when the
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* page inside |content| unloads.
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*/
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_unloadHandler: function() {
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this._shuttingDown = true;
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},
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_tryGetInnerWindowID: function(win) {
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let utils = win.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIDOMWindowUtils);
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try {
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return utils.currentInnerWindowID;
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}
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catch(e) {
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return null;
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}
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},
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/**
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* Show a modal prompt. Called by BrowserElementPromptService.
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*/
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showModalPrompt: function(win, args) {
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let utils = win.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIDOMWindowUtils);
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args.windowID = { outer: utils.outerWindowID,
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inner: this._tryGetInnerWindowID(win) };
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sendAsyncMsg('showmodalprompt', args);
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let returnValue = this._waitForResult(win);
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if (args.promptType == 'prompt' ||
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args.promptType == 'confirm' ||
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args.promptType == 'custom-prompt') {
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return returnValue;
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}
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},
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/**
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* Spin in a nested event loop until we receive a unblock-modal-prompt message for
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* this window.
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*/
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_waitForResult: function(win) {
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debug("_waitForResult(" + win + ")");
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let utils = win.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIDOMWindowUtils);
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let outerWindowID = utils.outerWindowID;
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let innerWindowID = this._tryGetInnerWindowID(win);
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if (innerWindowID === null) {
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// I have no idea what waiting for a result means when there's no inner
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// window, so let's just bail.
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debug("_waitForResult: No inner window. Bailing.");
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return;
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}
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this._windowIDDict[outerWindowID] = Cu.getWeakReference(win);
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debug("Entering modal state (outerWindowID=" + outerWindowID + ", " +
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"innerWindowID=" + innerWindowID + ")");
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utils.enterModalState();
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// We'll decrement win.modalDepth when we receive a unblock-modal-prompt message
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// for the window.
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if (!win.modalDepth) {
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win.modalDepth = 0;
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}
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win.modalDepth++;
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let origModalDepth = win.modalDepth;
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let thread = Services.tm.currentThread;
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debug("Nested event loop - begin");
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while (win.modalDepth == origModalDepth && !this._shuttingDown) {
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// Bail out of the loop if the inner window changed; that means the
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// window navigated. Bail out when we're shutting down because otherwise
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// we'll leak our window.
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if (this._tryGetInnerWindowID(win) !== innerWindowID) {
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debug("_waitForResult: Inner window ID changed " +
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"while in nested event loop.");
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break;
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}
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thread.processNextEvent(/* mayWait = */ true);
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}
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debug("Nested event loop - finish");
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// If we exited the loop because the inner window changed, then bail on the
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// modal prompt.
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if (innerWindowID !== this._tryGetInnerWindowID(win)) {
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throw Components.Exception("Modal state aborted by navigation",
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Cr.NS_ERROR_NOT_AVAILABLE);
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}
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let returnValue = win.modalReturnValue;
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delete win.modalReturnValue;
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if (!this._shuttingDown) {
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utils.leaveModalState();
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}
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debug("Leaving modal state (outerID=" + outerWindowID + ", " +
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"innerID=" + innerWindowID + ")");
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return returnValue;
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},
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_recvStopWaiting: function(msg) {
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let outerID = msg.json.windowID.outer;
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let innerID = msg.json.windowID.inner;
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let returnValue = msg.json.returnValue;
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debug("recvStopWaiting(outer=" + outerID + ", inner=" + innerID +
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", returnValue=" + returnValue + ")");
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if (!this._windowIDDict[outerID]) {
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debug("recvStopWaiting: No record of outer window ID " + outerID);
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return;
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}
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let win = this._windowIDDict[outerID].get();
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delete this._windowIDDict[outerID];
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if (!win) {
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debug("recvStopWaiting, but window is gone\n");
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return;
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}
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if (innerID !== this._tryGetInnerWindowID(win)) {
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debug("recvStopWaiting, but inner ID has changed\n");
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return;
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}
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debug("recvStopWaiting " + win);
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win.modalReturnValue = returnValue;
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win.modalDepth--;
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},
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_recvExitFullscreen: function() {
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var utils = content.document.defaultView
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.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIDOMWindowUtils);
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utils.exitFullscreen();
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},
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_titleChangedHandler: function(e) {
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debug("Got titlechanged: (" + e.target.title + ")");
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var win = e.target.defaultView;
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// Ignore titlechanges which don't come from the top-level
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// <iframe mozbrowser> window.
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if (win == content) {
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sendAsyncMsg('titlechange', { _payload_: e.target.title });
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}
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else {
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debug("Not top level!");
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}
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},
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_iconChangedHandler: function(e) {
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debug('Got iconchanged: (' + e.target.href + ')');
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sendAsyncMsg('iconchange', { _payload_: e.target.href });
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},
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_openSearchHandler: function(e) {
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debug('Got opensearch: (' + e.target.href + ')');
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if (e.target.type !== "application/opensearchdescription+xml") {
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return;
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}
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sendAsyncMsg('opensearch', { title: e.target.title,
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href: e.target.href });
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},
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// Processes the "rel" field in <link> tags and forward to specific handlers.
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_linkAddedHandler: function(e) {
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let win = e.target.ownerDocument.defaultView;
|
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// Ignore links which don't come from the top-level
|
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// <iframe mozbrowser> window.
|
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if (win != content) {
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debug('Not top level!');
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return;
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}
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let handlers = {
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'icon': this._iconChangedHandler,
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'search': this._openSearchHandler
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};
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debug('Got linkAdded: (' + e.target.href + ') ' + e.target.rel);
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e.target.rel.split(' ').forEach(function(x) {
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let token = x.toLowerCase();
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if (handlers[token]) {
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handlers[token](e);
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}
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}, this);
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},
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|
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_addMozAfterPaintHandler: function(callback) {
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function onMozAfterPaint() {
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let uri = docShell.QueryInterface(Ci.nsIWebNavigation).currentURI;
|
|
if (uri.spec != "about:blank") {
|
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debug("Got afterpaint event: " + uri.spec);
|
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removeEventListener('MozAfterPaint', onMozAfterPaint,
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/* useCapture = */ true);
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callback();
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}
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}
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addEventListener('MozAfterPaint', onMozAfterPaint, /* useCapture = */ true);
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return onMozAfterPaint;
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},
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|
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_removeMozAfterPaintHandler: function(listener) {
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removeEventListener('MozAfterPaint', listener,
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/* useCapture = */ true);
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},
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|
|
|
_activateNextPaintListener: function(e) {
|
|
if (!this._nextPaintHandler) {
|
|
this._nextPaintHandler = this._addMozAfterPaintHandler(function () {
|
|
this._nextPaintHandler = null;
|
|
sendAsyncMsg('nextpaint');
|
|
}.bind(this));
|
|
}
|
|
},
|
|
|
|
_deactivateNextPaintListener: function(e) {
|
|
if (this._nextPaintHandler) {
|
|
this._removeMozAfterPaintHandler(this._nextPaintHandler);
|
|
this._nextPaintHandler = null;
|
|
}
|
|
},
|
|
|
|
_windowCloseHandler: function(e) {
|
|
let win = e.target;
|
|
if (win != content || e.defaultPrevented) {
|
|
return;
|
|
}
|
|
|
|
debug("Closing window " + win);
|
|
sendAsyncMsg('close');
|
|
|
|
// Inform the window implementation that we handled this close ourselves.
|
|
e.preventDefault();
|
|
},
|
|
|
|
_windowCreatedHandler: function(e) {
|
|
let targetDocShell = e.target.defaultView
|
|
.QueryInterface(Ci.nsIInterfaceRequestor)
|
|
.getInterface(Ci.nsIWebNavigation);
|
|
if (targetDocShell != docShell) {
|
|
return;
|
|
}
|
|
|
|
let uri = docShell.QueryInterface(Ci.nsIWebNavigation).currentURI;
|
|
debug("Window created: " + uri.spec);
|
|
if (uri.spec != "about:blank") {
|
|
this._addMozAfterPaintHandler(function () {
|
|
sendAsyncMsg('documentfirstpaint');
|
|
});
|
|
}
|
|
},
|
|
|
|
_windowResizeHandler: function(e) {
|
|
let win = e.target;
|
|
if (win != content || e.defaultPrevented) {
|
|
return;
|
|
}
|
|
|
|
debug("resizing window " + win);
|
|
sendAsyncMsg('resize', { width: e.detail.width, height: e.detail.height });
|
|
|
|
// Inform the window implementation that we handled this resize ourselves.
|
|
e.preventDefault();
|
|
},
|
|
|
|
_contextmenuHandler: function(e) {
|
|
debug("Got contextmenu");
|
|
|
|
if (e.defaultPrevented) {
|
|
return;
|
|
}
|
|
|
|
this._ctxCounter++;
|
|
this._ctxHandlers = {};
|
|
|
|
var elem = e.target;
|
|
var menuData = {systemTargets: [], contextmenu: null};
|
|
var ctxMenuId = null;
|
|
|
|
while (elem && elem.parentNode) {
|
|
var ctxData = this._getSystemCtxMenuData(elem);
|
|
if (ctxData) {
|
|
menuData.systemTargets.push({
|
|
nodeName: elem.nodeName,
|
|
data: ctxData
|
|
});
|
|
}
|
|
|
|
if (!ctxMenuId && 'hasAttribute' in elem && elem.hasAttribute('contextmenu')) {
|
|
ctxMenuId = elem.getAttribute('contextmenu');
|
|
}
|
|
elem = elem.parentNode;
|
|
}
|
|
|
|
if (ctxMenuId) {
|
|
var menu = e.target.ownerDocument.getElementById(ctxMenuId);
|
|
if (menu) {
|
|
menuData.contextmenu = this._buildMenuObj(menu, '');
|
|
}
|
|
}
|
|
|
|
// The value returned by the contextmenu sync call is true iff the embedder
|
|
// called preventDefault() on its contextmenu event.
|
|
//
|
|
// We call preventDefault() on our contextmenu event iff the embedder called
|
|
// preventDefault() on /its/ contextmenu event. This way, if the embedder
|
|
// ignored the contextmenu event, TabChild will fire a click.
|
|
if (sendSyncMsg('contextmenu', menuData)[0]) {
|
|
e.preventDefault();
|
|
} else {
|
|
this._ctxHandlers = {};
|
|
}
|
|
},
|
|
|
|
_getSystemCtxMenuData: function(elem) {
|
|
if ((elem instanceof Ci.nsIDOMHTMLAnchorElement && elem.href) ||
|
|
(elem instanceof Ci.nsIDOMHTMLAreaElement && elem.href)) {
|
|
return {uri: elem.href};
|
|
}
|
|
if (elem instanceof Ci.nsIImageLoadingContent && elem.currentURI) {
|
|
return {uri: elem.currentURI.spec};
|
|
}
|
|
if (elem instanceof Ci.nsIDOMHTMLImageElement) {
|
|
return {uri: elem.src};
|
|
}
|
|
if (elem instanceof Ci.nsIDOMHTMLMediaElement) {
|
|
let hasVideo = !(elem.readyState >= elem.HAVE_METADATA &&
|
|
(elem.videoWidth == 0 || elem.videoHeight == 0));
|
|
return {uri: elem.currentSrc || elem.src, hasVideo: hasVideo};
|
|
}
|
|
return false;
|
|
},
|
|
|
|
_scrollEventHandler: function(e) {
|
|
let win = e.target.defaultView;
|
|
if (win != content) {
|
|
return;
|
|
}
|
|
|
|
debug("scroll event " + win);
|
|
sendAsyncMsg("scroll", { top: win.scrollY, left: win.scrollX });
|
|
},
|
|
|
|
_recvPurgeHistory: function(data) {
|
|
debug("Received purgeHistory message: (" + data.json.id + ")");
|
|
|
|
let history = docShell.QueryInterface(Ci.nsIWebNavigation).sessionHistory;
|
|
|
|
try {
|
|
if (history && history.count) {
|
|
history.PurgeHistory(history.count);
|
|
}
|
|
} catch(e) {}
|
|
|
|
sendAsyncMsg('got-purge-history', { id: data.json.id, successRv: true });
|
|
},
|
|
|
|
_recvGetScreenshot: function(data) {
|
|
debug("Received getScreenshot message: (" + data.json.id + ")");
|
|
|
|
let self = this;
|
|
let maxWidth = data.json.args.width;
|
|
let maxHeight = data.json.args.height;
|
|
let domRequestID = data.json.id;
|
|
|
|
let takeScreenshotClosure = function() {
|
|
self._takeScreenshot(maxWidth, maxHeight, domRequestID);
|
|
};
|
|
|
|
let maxDelayMS = 2000;
|
|
try {
|
|
maxDelayMS = Services.prefs.getIntPref('dom.browserElement.maxScreenshotDelayMS');
|
|
}
|
|
catch(e) {}
|
|
|
|
// Try to wait for the event loop to go idle before we take the screenshot,
|
|
// but once we've waited maxDelayMS milliseconds, go ahead and take it
|
|
// anyway.
|
|
Cc['@mozilla.org/message-loop;1'].getService(Ci.nsIMessageLoop).postIdleTask(
|
|
takeScreenshotClosure, maxDelayMS);
|
|
},
|
|
|
|
/**
|
|
* Actually take a screenshot and foward the result up to our parent, given
|
|
* the desired maxWidth and maxHeight, and given the DOMRequest ID associated
|
|
* with the request from the parent.
|
|
*/
|
|
_takeScreenshot: function(maxWidth, maxHeight, domRequestID) {
|
|
// You can think of the screenshotting algorithm as carrying out the
|
|
// following steps:
|
|
//
|
|
// - Let scaleWidth be the factor by which we'd need to downscale the
|
|
// viewport so it would fit within maxWidth. (If the viewport's width
|
|
// is less than maxWidth, let scaleWidth be 1.) Compute scaleHeight
|
|
// the same way.
|
|
//
|
|
// - Scale the viewport by max(scaleWidth, scaleHeight). Now either the
|
|
// viewport's width is no larger than maxWidth, the viewport's height is
|
|
// no larger than maxHeight, or both.
|
|
//
|
|
// - Crop the viewport so its width is no larger than maxWidth and its
|
|
// height is no larger than maxHeight.
|
|
//
|
|
// - Return a screenshot of the page's viewport scaled and cropped per
|
|
// above.
|
|
debug("Taking a screenshot: maxWidth=" + maxWidth +
|
|
", maxHeight=" + maxHeight +
|
|
", domRequestID=" + domRequestID + ".");
|
|
|
|
if (!content) {
|
|
// If content is not loaded yet, bail out since even sendAsyncMessage
|
|
// fails...
|
|
debug("No content yet!");
|
|
return;
|
|
}
|
|
|
|
let scaleWidth = Math.min(1, maxWidth / content.innerWidth);
|
|
let scaleHeight = Math.min(1, maxHeight / content.innerHeight);
|
|
|
|
let scale = Math.max(scaleWidth, scaleHeight);
|
|
|
|
let canvasWidth = Math.min(maxWidth, Math.round(content.innerWidth * scale));
|
|
let canvasHeight = Math.min(maxHeight, Math.round(content.innerHeight * scale));
|
|
|
|
var canvas = content.document
|
|
.createElementNS("http://www.w3.org/1999/xhtml", "canvas");
|
|
canvas.mozOpaque = true;
|
|
canvas.width = canvasWidth;
|
|
canvas.height = canvasHeight;
|
|
|
|
var ctx = canvas.getContext("2d");
|
|
ctx.scale(scale, scale);
|
|
ctx.drawWindow(content, 0, 0, content.innerWidth, content.innerHeight,
|
|
"rgb(255,255,255)");
|
|
|
|
// Take a JPEG screenshot to hack around the fact that we can't specify
|
|
// opaque PNG. This requires us to unpremultiply the alpha channel, which
|
|
// is expensive on ARM processors because they lack a hardware integer
|
|
// division instruction.
|
|
canvas.toBlob(function(blob) {
|
|
sendAsyncMsg('got-screenshot', {
|
|
id: domRequestID,
|
|
successRv: blob
|
|
});
|
|
}, 'image/jpeg');
|
|
},
|
|
|
|
_recvFireCtxCallback: function(data) {
|
|
debug("Received fireCtxCallback message: (" + data.json.menuitem + ")");
|
|
// We silently ignore if the embedder uses an incorrect id in the callback
|
|
if (data.json.menuitem in this._ctxHandlers) {
|
|
this._ctxHandlers[data.json.menuitem].click();
|
|
this._ctxHandlers = {};
|
|
} else {
|
|
debug("Ignored invalid contextmenu invocation");
|
|
}
|
|
},
|
|
|
|
_buildMenuObj: function(menu, idPrefix) {
|
|
function maybeCopyAttribute(src, target, attribute) {
|
|
if (src.getAttribute(attribute)) {
|
|
target[attribute] = src.getAttribute(attribute);
|
|
}
|
|
}
|
|
|
|
var menuObj = {type: 'menu', items: []};
|
|
maybeCopyAttribute(menu, menuObj, 'label');
|
|
|
|
for (var i = 0, child; child = menu.children[i++];) {
|
|
if (child.nodeName === 'MENU') {
|
|
menuObj.items.push(this._buildMenuObj(child, idPrefix + i + '_'));
|
|
} else if (child.nodeName === 'MENUITEM') {
|
|
var id = this._ctxCounter + '_' + idPrefix + i;
|
|
var menuitem = {id: id, type: 'menuitem'};
|
|
maybeCopyAttribute(child, menuitem, 'label');
|
|
maybeCopyAttribute(child, menuitem, 'icon');
|
|
this._ctxHandlers[id] = child;
|
|
menuObj.items.push(menuitem);
|
|
}
|
|
}
|
|
return menuObj;
|
|
},
|
|
|
|
_recvSetVisible: function(data) {
|
|
debug("Received setVisible message: (" + data.json.visible + ")");
|
|
if (this._forcedVisible == data.json.visible) {
|
|
return;
|
|
}
|
|
|
|
this._forcedVisible = data.json.visible;
|
|
this._updateVisibility();
|
|
},
|
|
|
|
_recvVisible: function(data) {
|
|
sendAsyncMsg('got-visible', {
|
|
id: data.json.id,
|
|
successRv: docShell.isActive
|
|
});
|
|
},
|
|
|
|
/**
|
|
* Called when the window which contains this iframe becomes hidden or
|
|
* visible.
|
|
*/
|
|
_recvOwnerVisibilityChange: function(data) {
|
|
debug("Received ownerVisibilityChange: (" + data.json.visible + ")");
|
|
this._ownerVisible = data.json.visible;
|
|
this._updateVisibility();
|
|
},
|
|
|
|
_updateVisibility: function() {
|
|
var visible = this._forcedVisible && this._ownerVisible;
|
|
if (docShell.isActive !== visible) {
|
|
docShell.isActive = visible;
|
|
sendAsyncMsg('visibilitychange', {visible: visible});
|
|
}
|
|
},
|
|
|
|
_recvSendMouseEvent: function(data) {
|
|
let json = data.json;
|
|
let utils = content.QueryInterface(Ci.nsIInterfaceRequestor)
|
|
.getInterface(Ci.nsIDOMWindowUtils);
|
|
utils.sendMouseEvent(json.type, json.x, json.y, json.button,
|
|
json.clickCount, json.modifiers);
|
|
},
|
|
|
|
_recvSendTouchEvent: function(data) {
|
|
let json = data.json;
|
|
let utils = content.QueryInterface(Ci.nsIInterfaceRequestor)
|
|
.getInterface(Ci.nsIDOMWindowUtils);
|
|
utils.sendTouchEvent(json.type, json.identifiers, json.touchesX,
|
|
json.touchesY, json.radiisX, json.radiisY,
|
|
json.rotationAngles, json.forces, json.count,
|
|
json.modifiers);
|
|
},
|
|
|
|
_recvCanGoBack: function(data) {
|
|
var webNav = docShell.QueryInterface(Ci.nsIWebNavigation);
|
|
sendAsyncMsg('got-can-go-back', {
|
|
id: data.json.id,
|
|
successRv: webNav.canGoBack
|
|
});
|
|
},
|
|
|
|
_recvCanGoForward: function(data) {
|
|
var webNav = docShell.QueryInterface(Ci.nsIWebNavigation);
|
|
sendAsyncMsg('got-can-go-forward', {
|
|
id: data.json.id,
|
|
successRv: webNav.canGoForward
|
|
});
|
|
},
|
|
|
|
_recvGoBack: function(data) {
|
|
try {
|
|
docShell.QueryInterface(Ci.nsIWebNavigation).goBack();
|
|
} catch(e) {
|
|
// Silently swallow errors; these happen when we can't go back.
|
|
}
|
|
},
|
|
|
|
_recvGoForward: function(data) {
|
|
try {
|
|
docShell.QueryInterface(Ci.nsIWebNavigation).goForward();
|
|
} catch(e) {
|
|
// Silently swallow errors; these happen when we can't go forward.
|
|
}
|
|
},
|
|
|
|
_recvReload: function(data) {
|
|
let webNav = docShell.QueryInterface(Ci.nsIWebNavigation);
|
|
let reloadFlags = data.json.hardReload ?
|
|
webNav.LOAD_FLAGS_BYPASS_PROXY | webNav.LOAD_FLAGS_BYPASS_CACHE :
|
|
webNav.LOAD_FLAGS_NONE;
|
|
try {
|
|
webNav.reload(reloadFlags);
|
|
} catch(e) {
|
|
// Silently swallow errors; these can happen if a used cancels reload
|
|
}
|
|
},
|
|
|
|
_recvStop: function(data) {
|
|
let webNav = docShell.QueryInterface(Ci.nsIWebNavigation);
|
|
webNav.stop(webNav.STOP_NETWORK);
|
|
},
|
|
|
|
_recvSetInputMethodActive: function(data) {
|
|
let msgData = { id: data.json.id };
|
|
// Unwrap to access webpage content.
|
|
let nav = XPCNativeWrapper.unwrap(content.document.defaultView.navigator);
|
|
if (nav.mozInputMethod) {
|
|
// Wrap to access the chrome-only attribute setActive.
|
|
new XPCNativeWrapper(nav.mozInputMethod).setActive(data.json.args.isActive);
|
|
msgData.successRv = null;
|
|
} else {
|
|
msgData.errorMsg = 'Cannot access mozInputMethod.';
|
|
}
|
|
sendAsyncMsg('got-set-input-method-active', msgData);
|
|
},
|
|
|
|
_keyEventHandler: function(e) {
|
|
if (whitelistedEvents.indexOf(e.keyCode) != -1 && !e.defaultPrevented) {
|
|
sendAsyncMsg('keyevent', {
|
|
type: e.type,
|
|
keyCode: e.keyCode,
|
|
charCode: e.charCode,
|
|
});
|
|
}
|
|
},
|
|
|
|
// The docShell keeps a weak reference to the progress listener, so we need
|
|
// to keep a strong ref to it ourselves.
|
|
_progressListener: {
|
|
QueryInterface: XPCOMUtils.generateQI([Ci.nsIWebProgressListener,
|
|
Ci.nsISupportsWeakReference]),
|
|
_seenLoadStart: false,
|
|
|
|
onLocationChange: function(webProgress, request, location, flags) {
|
|
// We get progress events from subshells here, which is kind of weird.
|
|
if (webProgress != docShell) {
|
|
return;
|
|
}
|
|
|
|
// Ignore locationchange events which occur before the first loadstart.
|
|
// These are usually about:blank loads we don't care about.
|
|
if (!this._seenLoadStart) {
|
|
return;
|
|
}
|
|
|
|
// Remove password and wyciwyg from uri.
|
|
location = Cc["@mozilla.org/docshell/urifixup;1"]
|
|
.getService(Ci.nsIURIFixup).createExposableURI(location);
|
|
|
|
sendAsyncMsg('locationchange', { _payload_: location.spec });
|
|
},
|
|
|
|
onStateChange: function(webProgress, request, stateFlags, status) {
|
|
if (webProgress != docShell) {
|
|
return;
|
|
}
|
|
|
|
if (stateFlags & Ci.nsIWebProgressListener.STATE_START) {
|
|
this._seenLoadStart = true;
|
|
sendAsyncMsg('loadstart');
|
|
}
|
|
|
|
if (stateFlags & Ci.nsIWebProgressListener.STATE_STOP) {
|
|
let bgColor = 'transparent';
|
|
try {
|
|
bgColor = content.getComputedStyle(content.document.body)
|
|
.getPropertyValue('background-color');
|
|
} catch (e) {}
|
|
sendAsyncMsg('loadend', {backgroundColor: bgColor});
|
|
|
|
// Ignoring NS_BINDING_ABORTED, which is set when loading page is
|
|
// stopped.
|
|
if (status == Cr.NS_OK ||
|
|
status == Cr.NS_BINDING_ABORTED) {
|
|
return;
|
|
}
|
|
|
|
if (NS_ERROR_GET_MODULE(status) == NS_ERROR_MODULE_SECURITY &&
|
|
getErrorClass(status) == Ci.nsINSSErrorsService.ERROR_CLASS_BAD_CERT) {
|
|
|
|
// XXX Is there a point firing the event if the error page is not
|
|
// certerror? If yes, maybe we should add a property to the
|
|
// event to to indicate whether there is a custom page. That would
|
|
// let the embedder have more control over the desired behavior.
|
|
var errorPage = null;
|
|
try {
|
|
errorPage = Services.prefs.getCharPref(CERTIFICATE_ERROR_PAGE_PREF);
|
|
} catch(e) {}
|
|
|
|
if (errorPage == 'certerror') {
|
|
sendAsyncMsg('error', { type: 'certerror' });
|
|
return;
|
|
}
|
|
}
|
|
|
|
// TODO See nsDocShell::DisplayLoadError for a list of all the error
|
|
// codes (the status param) we should eventually handle here.
|
|
sendAsyncMsg('error', { type: 'other' });
|
|
}
|
|
},
|
|
|
|
onSecurityChange: function(webProgress, request, state) {
|
|
if (webProgress != docShell) {
|
|
return;
|
|
}
|
|
|
|
var stateDesc;
|
|
if (state & Ci.nsIWebProgressListener.STATE_IS_SECURE) {
|
|
stateDesc = 'secure';
|
|
}
|
|
else if (state & Ci.nsIWebProgressListener.STATE_IS_BROKEN) {
|
|
stateDesc = 'broken';
|
|
}
|
|
else if (state & Ci.nsIWebProgressListener.STATE_IS_INSECURE) {
|
|
stateDesc = 'insecure';
|
|
}
|
|
else {
|
|
debug("Unexpected securitychange state!");
|
|
stateDesc = '???';
|
|
}
|
|
|
|
// XXX Until bug 764496 is fixed, this will always return false.
|
|
var isEV = !!(state & Ci.nsIWebProgressListener.STATE_IDENTITY_EV_TOPLEVEL);
|
|
|
|
sendAsyncMsg('securitychange', { state: stateDesc, extendedValidation: isEV });
|
|
},
|
|
|
|
onStatusChange: function(webProgress, request, status, message) {},
|
|
onProgressChange: function(webProgress, request, curSelfProgress,
|
|
maxSelfProgress, curTotalProgress, maxTotalProgress) {},
|
|
},
|
|
|
|
// Expose the message manager for WebApps and others.
|
|
_messageManagerPublic: {
|
|
sendAsyncMessage: global.sendAsyncMessage.bind(global),
|
|
sendSyncMessage: global.sendSyncMessage.bind(global),
|
|
addMessageListener: global.addMessageListener.bind(global),
|
|
removeMessageListener: global.removeMessageListener.bind(global)
|
|
},
|
|
|
|
get messageManager() {
|
|
return this._messageManagerPublic;
|
|
}
|
|
};
|
|
|
|
var api = new BrowserElementChild();
|
|
|