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browser/extensions/shumway/content/ShumwayUtils.jsm@6474c204b198 (annotated)

browser/extensions/shumway/content/ShumwayUtils.jsm

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0	1	/* Copyright 2012 Mozilla Foundation
michael@0	2	*
michael@0	3	* Licensed under the Apache License, Version 2.0 (the "License");
michael@0	4	* you may not use this file except in compliance with the License.
michael@0	5	* You may obtain a copy of the License at
michael@0	6	*
michael@0	7	* http://www.apache.org/licenses/LICENSE-2.0
michael@0	8	*
michael@0	9	* Unless required by applicable law or agreed to in writing, software
michael@0	10	* distributed under the License is distributed on an "AS IS" BASIS,
michael@0	11	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
michael@0	12	* See the License for the specific language governing permissions and
michael@0	13	* limitations under the License.
michael@0	14	*/
michael@0	15
michael@0	16	var EXPORTED_SYMBOLS = ["ShumwayUtils"];
michael@0	17
michael@0	18	const RESOURCE_NAME = 'shumway';
michael@0	19	const EXT_PREFIX = 'shumway@research.mozilla.org';
michael@0	20	const SWF_CONTENT_TYPE = 'application/x-shockwave-flash';
michael@0	21	const PREF_PREFIX = 'shumway.';
michael@0	22	const PREF_DISABLED = PREF_PREFIX + 'disabled';
michael@0	23	const PREF_IGNORE_CTP = PREF_PREFIX + 'ignoreCTP';
michael@0	24
michael@0	25	let Cc = Components.classes;
michael@0	26	let Ci = Components.interfaces;
michael@0	27	let Cm = Components.manager;
michael@0	28	let Cu = Components.utils;
michael@0	29
michael@0	30	Cu.import('resource://gre/modules/XPCOMUtils.jsm');
michael@0	31	Cu.import('resource://gre/modules/Services.jsm');
michael@0	32	Cu.import('resource://shumway/ShumwayStreamConverter.jsm');
michael@0	33
michael@0	34	let Svc = {};
michael@0	35	XPCOMUtils.defineLazyServiceGetter(Svc, 'mime',
michael@0	36	'@mozilla.org/mime;1',
michael@0	37	'nsIMIMEService');
michael@0	38	XPCOMUtils.defineLazyServiceGetter(Svc, 'pluginHost',
michael@0	39	'@mozilla.org/plugin/host;1',
michael@0	40	'nsIPluginHost');
michael@0	41
michael@0	42	function getBoolPref(pref, def) {
michael@0	43	try {
michael@0	44	return Services.prefs.getBoolPref(pref);
michael@0	45	} catch (ex) {
michael@0	46	return def;
michael@0	47	}
michael@0	48	}
michael@0	49
michael@0	50	function log(str) {
michael@0	51	dump(str + '\n');
michael@0	52	}
michael@0	53
michael@0	54	// Register/unregister a constructor as a factory.
michael@0	55	function Factory() {}
michael@0	56	Factory.prototype = {
michael@0	57	register: function register(targetConstructor) {
michael@0	58	var proto = targetConstructor.prototype;
michael@0	59	this._classID = proto.classID;
michael@0	60
michael@0	61	var factory = XPCOMUtils._getFactory(targetConstructor);
michael@0	62	this._factory = factory;
michael@0	63
michael@0	64	var registrar = Cm.QueryInterface(Ci.nsIComponentRegistrar);
michael@0	65	registrar.registerFactory(proto.classID, proto.classDescription,
michael@0	66	proto.contractID, factory);
michael@0	67	},
michael@0	68
michael@0	69	unregister: function unregister() {
michael@0	70	var registrar = Cm.QueryInterface(Ci.nsIComponentRegistrar);
michael@0	71	registrar.unregisterFactory(this._classID, this._factory);
michael@0	72	this._factory = null;
michael@0	73	}
michael@0	74	};
michael@0	75
michael@0	76	let converterFactory = new Factory();
michael@0	77	let overlayConverterFactory = new Factory();
michael@0	78
michael@0	79	let ShumwayUtils = {
michael@0	80	QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver]),
michael@0	81	_registered: false,
michael@0	82
michael@0	83	init: function init() {
michael@0	84	if (this.enabled)
michael@0	85	this._ensureRegistered();
michael@0	86	else
michael@0	87	this._ensureUnregistered();
michael@0	88
michael@0	89	// Listen for when shumway is completely disabled.
michael@0	90	Services.prefs.addObserver(PREF_DISABLED, this, false);
michael@0	91	},
michael@0	92
michael@0	93	// nsIObserver
michael@0	94	observe: function observe(aSubject, aTopic, aData) {
michael@0	95	if (this.enabled)
michael@0	96	this._ensureRegistered();
michael@0	97	else
michael@0	98	this._ensureUnregistered();
michael@0	99	},
michael@0	100
michael@0	101	/**
michael@0	102	* shumway is only enabled if the global switch enabling is true.
michael@0	103	* @return {boolean} Wether or not it's enabled.
michael@0	104	*/
michael@0	105	get enabled() {
michael@0	106	return !getBoolPref(PREF_DISABLED, true);
michael@0	107	},
michael@0	108
michael@0	109	_ensureRegistered: function _ensureRegistered() {
michael@0	110	if (this._registered)
michael@0	111	return;
michael@0	112
michael@0	113	// Load the component and register it.
michael@0	114	converterFactory.register(ShumwayStreamConverter);
michael@0	115	overlayConverterFactory.register(ShumwayStreamOverlayConverter);
michael@0	116
michael@0	117	var ignoreCTP = getBoolPref(PREF_IGNORE_CTP, true);
michael@0	118
michael@0	119	Svc.pluginHost.registerPlayPreviewMimeType(SWF_CONTENT_TYPE, ignoreCTP);
michael@0	120
michael@0	121	this._registered = true;
michael@0	122
michael@0	123	log('Shumway is registered');
michael@0	124	},
michael@0	125
michael@0	126	_ensureUnregistered: function _ensureUnregistered() {
michael@0	127	if (!this._registered)
michael@0	128	return;
michael@0	129
michael@0	130	// Remove the contract/component.
michael@0	131	converterFactory.unregister();
michael@0	132	overlayConverterFactory.unregister();
michael@0	133
michael@0	134	Svc.pluginHost.unregisterPlayPreviewMimeType(SWF_CONTENT_TYPE);
michael@0	135
michael@0	136	this._registered = false;
michael@0	137
michael@0	138	log('Shumway is unregistered');
michael@0	139	}
michael@0	140	};