Implemented ext.contextMenus for Safari

chrome/background.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
@@ skipping 352 matching lines @@
     onCompleted: new CompletedTabEventTarget(),
     onActivated: new ActivatedTabEventTarget(),
     onRemoved: new RemovedTabEventTarget()
   };
 
   ext.webRequest = {
     onBeforeRequest: new BeforeRequestEventTarget(),
     handlerBehaviorChanged: chrome.webRequest.handlerBehaviorChanged
   };
 
+  var contextMenuItems = [];
+  var isContextMenuHidden = true;
   ext.contextMenus = {
-    create: function(title, contexts, onclick)
+    addMenuItem: function(title, contexts, onclick)
     {
-      chrome.contextMenus.create({
+      contextMenuItems.push({
         title: title,
         contexts: contexts,
         onclick: function(info, tab)
         {
           onclick(info.srcUrl, new Tab(tab));
         }
       });
+      this.showMenuItems();
     },
-    removeAll: function(callback)
+    removeMenuItems: function()
     {
-      chrome.contextMenus.removeAll(callback);
+      contextMenuItems = [];
+      this.hideMenuItems();
+    },
+    showMenuItems: function()
+    {
+      if (!isContextMenuHidden)
+        return;
+
+      chrome.contextMenus.removeAll(function()
+      {
+        for (var i = 0; i < contextMenuItems.length; i++)
+        {
+          var item = contextMenuItems[i];
+          chrome.contextMenus.create({
+            title: item.title,
+            contexts: item.contexts,
+            onclick: item.onclick
+          });
+        }
+      });
+      isContextMenuHidden = false;
+    },
+    hideMenuItems: function()
+    {
+      if (isContextMenuHidden)
+        return;
+
+      chrome.contextMenus.removeAll();
+      isContextMenuHidden = true;
     }
   };
 })();