Added Safari Support

safari/common.js

 /*
  * This file is part of Adblock Plus <http://adblockplus.org/>,
  * Copyright (C) 2006-2013 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
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 (function() {
   /* Events */
 
-  WrappedEventTarget = function(target, eventName, capture) {
+  WrappedEventTarget = function(target, eventName, capture)
+  {
     this._listeners = [];
     this._wrappedListeners = [];
 
     this._target = target;
     this._eventName = eventName;
     this._capture = capture;
   };
   WrappedEventTarget.prototype = {
-    addListener: function(listener) {
+    addListener: function(listener)
+    {
       var wrappedListener = this._wrapListener(listener);
 
       this._listeners.push(listener);
       this._wrappedListeners.push(wrappedListener);
 
       this._target.addEventListener(
         this._eventName,
         wrappedListener,
         this._capture
       );
     },
-    removeListener: function(listener) {
+    removeListener: function(listener)
+    {
       var idx = this._listeners.indexOf(listener);
 
-      if (idx != -1) {
+      if (idx != -1)
+      {
         this._target.removeEventListener(
           this._eventName,
           this._wrappedListeners[idx],
           this._capture
         );
 
         this._listeners.splice(idx, 1);
         this._wrappedListeners.splice(idx, 1);
       }
     }
   };
 
 
-  MessageEventTarget = function(target) {
+  MessageEventTarget = function(target)
+  {
     WrappedEventTarget.call(this, target, "message", false);
   };
   MessageEventTarget.prototype = {
     __proto__: WrappedEventTarget.prototype,
-    _wrapListener: function(listener) {
-      return function(event) {
+    _wrapListener: function(listener)
+    {
+      return function(event)
+      {
         if (event.name.indexOf("request-") != 0)
           return;
 
         var sender = {};
         var dispatcher;
 
-        if (event.target instanceof SafariBrowserTab) {
+        if ("SafariBrowserTab" in window && event.target instanceof SafariBrowserTab)
+        {
           dispatcher = event.target.page;
           sender.tab = new Tab(event.target);
-        } else {
+        }
+        else
+        {
           dispatcher = event.target.tab;
           sender.tab = null;
         }
 
-        listener(event.message, sender, function(message) {
+        listener(event.message, sender, function(message)
+        {
           dispatcher.dispatchMessage("response-" + event.name.substr(8), message);
         });
       };
     }
   };
 
 
   /* Message passing */
 
   var requestCounter = 0;
 
-  sendMessage = function(message, responseCallback) {
+  sendMessage = function(message, responseCallback)
+  {
     var requestId = ++requestCounter;
 
-    if (responseCallback) {
+    if (responseCallback)
+    {
       var eventTarget = this._eventTarget;
-      var responseListener = function(event) {
-        if (event.name == "response-" + requestId) {
+      var responseListener = function(event)
+      {
+        if (event.name == "response-" + requestId)
+        {
           eventTarget.removeEventListener("message", responseListener, false);
           responseCallback(event.message);
         }
       };
       eventTarget.addEventListener("message", responseListener, false);
     }
 
     this._messageDispatcher.dispatchMessage("request-" + requestId, message);
   };
 
 
   /* I18n */
 
-  var I18n = function() {
+  var I18n = function()
+  {
     this._localeCandidates = this._getLocaleCandidates();
     this._uiLocale = this._localeCandidates[0];
   };
   I18n.prototype = {
-    _getLocaleCandidates: function() {
-      var bits, i, locale;
+    _getLocaleCandidates: function()
+    {
       var candidates = [];
-      var default_locale = "en_US";
-
-      for (i = (bits = navigator.language.split("-")).length; i > 0; i--) {
-        locale = bits.slice(0, i).join("_");
+      var defaultLocale = "en_US";
+
+      var bits, i;
+      for (i = (bits = navigator.language.split("-")).length; i > 0; i--)
+      {
+        var locale = bits.slice(0, i).join("_");
         candidates.push(locale);
 
-        if (locale == default_locale)
+        if (locale == defaultLocale)
           return candidates;
       }
 
-      candidates.push(default_locale);
+      candidates.push(defaultLocale);
       return candidates;
     },
-    _getCatalog: function(locale) {
+    _getCatalog: function(locale)
+    {
       var xhr = new XMLHttpRequest();
       
       xhr.open("GET", safari.extension.baseURI + "_locales/" + locale + "/messages.json", false);
 
       try {
         xhr.send();
-      } catch (e) {
+      }
+      catch (e)
+      {
         return null;
       }
 
       return JSON.parse(xhr.responseText);
     },
-    getMessage: function(msgId, substitutions) {
+    getMessage: function(msgId, substitutions)
+    {
       if (msgId == "@@ui_locale")
         return this._uiLocale;
 
-      for (var i = 0; i < this._localeCandidates.length; i++) {
+      for (var i = 0; i < this._localeCandidates.length; i++)
+      {
         var catalog = this._getCatalog(this._localeCandidates[i]);
-        if (!catalog) {
+        if (!catalog)
+        {
           // if there is no catalog for this locale
-          // candidate, dont"t try to load it again
+          // candidate, don't try to load it again
           this._localeCandidates.splice(i--, 1);
           continue;
         }
 
         var msg = catalog[msgId];
         if (!msg)
           continue;
 
         var msgstr = msg.message;
         if (!msgstr)
           continue;
 
-        for (var placeholder in msg.placeholders) {
+        for (var placeholder in msg.placeholders)
+        {
           var placeholderDetails = msg.placeholders[placeholder];
           if (!placeholderDetails || !placeholderDetails.content)
             continue;
           if (placeholderDetails.content.indexOf("$") != 0)
             continue;
 
           var placeholderIdx = parseInt(placeholderDetails.content.substr(1));
           if (isNaN(placeholderIdx) || placeholderIdx < 1)
             continue;
 
@@ skipping 10 matching lines @@
       }
 
       return "";
     }
   };
 
 
   /* API */
 
   ext = {
-    getURL: function(path) {
+    getURL: function(path)
+    {
       return safari.extension.baseURI + path;
     },
     i18n: new I18n()
   };
 })();