e10s ready!

Fixes #60 and #42

data/frame.js

@@ -0,0 +1,75 @@
+/* jslint moz: true */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+(function(){
+	"use strict";
+	
+	const {utils: Cu} = Components;
+	const COMMONJS_URI = "resource://gre/modules/commonjs";
+	const {require} = Cu.import(COMMONJS_URI + "/toolkit/require.js", {});
+	const {intercept} = require("../lib/intercept.js");
+	const {ask} = require("../lib/askForPermission.js");
+	
+	// Variable to "unload" the script
+	var enabled = true;
+	
+	function check(message){
+		if (enabled){
+			var status = sendSyncMessage(
+				"canvasBlocker-check",
+				message
+			);
+			return status[0];
+		}
+		else {
+			return {type: [], mode: "allow"};
+		}
+	}
+	function askWrapper(data){
+		return ask(data, {
+			_: function(token){
+				return sendSyncMessage(
+					"canvasBlocker-translate",
+					token
+				)[0];
+			},
+			prefs: function(name){
+				return sendSyncMessage(
+					"canvasBlocker-pref-get",
+					name
+				)[0];
+			}
+		});
+	}
+	function notify(data){
+		sendAsyncMessage("canvasBlocker-notify", data);
+	}
+	
+	function interceptWrapper(ev){
+		if (enabled){
+			// window is only equal to content for the top window. For susequent
+			// calls (e.g. iframe windows) the new generated window has to be 
+			// used.
+			
+			var window = ev.target.defaultView;
+			intercept(
+				{subject: window},
+				{check, ask: askWrapper, notify}
+			);
+		}
+	}
+	
+	addEventListener("DOMWindowCreated", interceptWrapper);
+	var context = this;
+	addEventListener("unload", function(ev){
+		if (ev.target === context){
+			removeEventListener("DOMWindowCreated", interceptWrapper);
+		}
+	});
+	addMessageListener("canvasBlocker-unload", function unload(){
+		enabled = false;
+		removeEventListener("DOMWindowCreated", interceptWrapper);
+		removeMessageListener("canvasBlocker-unload", unload);
+	});
+}());