Implemented ext.contextMenus for Safari

safari/content.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 287 matching lines @@
 
   ext.backgroundPage = {
     _eventTarget: safari.self,
     _messageDispatcher: safari.self.tab,
 
     sendMessage: sendMessage,
     getWindow: function() { return proxy.getObject(0); }
   };
 
   ext.onMessage = new MessageEventTarget(safari.self);
+
+  // Safari does not pass the element which the context menu is refering to
+  // so we need to add it to the event's user info.
+  document.addEventListener("contextmenu", function(event)
+  {
+    var element = event.srcElement;
+    safari.self.tab.setContextMenuEventUserInfo(event, {
+      srcUrl: ("src" in element) ? element.src : null,
+      tagName: element.tagName
+    });
+  }, false);
 })();