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110 lines
3.3 KiB
JavaScript
110 lines
3.3 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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function debug(msg) {
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dump("BrowserElementChild - " + msg + "\n");
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}
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function sendAsyncMsg(msg, data) {
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sendAsyncMessage('browser-element-api:' + msg, data);
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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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function BrowserElementChild() {
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this._init();
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};
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BrowserElementChild.prototype = {
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_init: function() {
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debug("Starting up.");
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sendAsyncMsg("hello");
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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_STATE_WINDOW);
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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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},
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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', 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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// The docShell keeps a weak reference to the progress listener, so we need
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// to keep a strong ref to it ourselves.
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_progressListener: {
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QueryInterface: XPCOMUtils.generateQI([Ci.nsIWebProgressListener,
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Ci.nsISupportsWeakReference,
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Ci.nsISupports]),
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_seenLoadStart: false,
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onLocationChange: function(webProgress, request, location, flags) {
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// We get progress events from subshells here, which is kind of weird.
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if (webProgress != docShell) {
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return;
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}
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// Ignore locationchange events which occur before the first loadstart.
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// These are usually about:blank loads we don't care about.
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if (!this._seenLoadStart) {
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return;
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}
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sendAsyncMsg('locationchange', location.spec);
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},
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onStateChange: function(webProgress, request, stateFlags, status) {
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if (webProgress != docShell) {
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return;
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}
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if (stateFlags & Ci.nsIWebProgressListener.STATE_START) {
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this._seenLoadStart = true;
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sendAsyncMsg('loadstart');
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}
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if (stateFlags & Ci.nsIWebProgressListener.STATE_STOP) {
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sendAsyncMsg('loadend');
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}
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},
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onStatusChange: function(webProgress, request, status, message) {},
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onProgressChange: function(webProgress, request, curSelfProgress,
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maxSelfProgress, curTotalProgress, maxTotalProgress) {},
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onSecurityChange: function(webProgress, request, aState) {}
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},
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};
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var api = new BrowserElementChild();
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