Noissue - Merge current tip to Edge bookmark

ext/common.js

Index: ext/common.js
===================================================================
--- a/ext/common.js
+++ b/ext/common.js
@@ -1,6 +1,6 @@
 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
- * Copyright (C) 2006-2016 Eyeo GmbH
+ * Copyright (C) 2006-2017 eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
@@ -17,37 +17,65 @@
 
 "use strict";
 
+(function()
 {
   // Both Edge and Mozilla Web Extensions use the namespace 'browser' instead of 'chrome'
   if (typeof browser != 'undefined')
     window.chrome = window.browser;
 
   window.ext = {};
+
   let EventTarget = ext._EventTarget = function()
   {
-    this._listeners = [];
+    this._listeners = new Set();
   };
   EventTarget.prototype = {
     addListener(listener)
     {
-      if (this._listeners.indexOf(listener) == -1)
-        this._listeners.push(listener);
+      this._listeners.add(listener);
     },
     removeListener(listener)
     {
-      let idx = this._listeners.indexOf(listener);
-      if (idx != -1)
-        this._listeners.splice(idx, 1);
+      this._listeners.delete(listener);
     },
-    _dispatch()
+    _dispatch(...args)
     {
       let results = [];
-      let listeners = this._listeners.slice();
 
-      for (let listener of listeners)
-        results.push(listener.apply(null, arguments));
+      for (let listener of this._listeners)
+        results.push(listener(...args));
 
       return results;
     }
   };
-}
+
+  // Workaround since HTMLCollection and NodeList didn't have iterator support
+  // before Chrome 51.
+  // https://bugs.chromium.org/p/chromium/issues/detail?id=401699
+  let arrayIterator = Array.prototype[Symbol.iterator];
+  if (!(Symbol.iterator in HTMLCollection.prototype))
+    HTMLCollection.prototype[Symbol.iterator] = arrayIterator;
+  if (!(Symbol.iterator in NodeList.prototype))
+    NodeList.prototype[Symbol.iterator] = arrayIterator;
+
+  /* Message passing */
+
+  ext.onMessage = new ext._EventTarget();
+
+
+  /* Background page */
+
+  ext.backgroundPage = {
+    sendMessage: chrome.runtime.sendMessage,
+    getWindow()
+    {
+      return chrome.extension.getBackgroundPage();
+    }
+  };
+
+
+  /* Utils */
+
+  ext.getURL = chrome.extension.getURL;
+  ext.i18n = chrome.i18n;
+}());