Issue 1663 - Made first-run page use an asynchronous messaging protocol

ext/content.js

 /*
  * This file is part of Adblock Plus <http://adblockplus.org/>,
  * Copyright (C) 2006-2014 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(global)
 {
   if (!global.ext)
     global.ext = {};
 
-  function getURLParameters(data)
+  function updateFromURL(data)
   {
     if (window.location.search)
     {
       var params = window.location.search.substr(1).split("&");
       for (var i = 0; i < params.length; i++)
       {
         var parts = params[i].split("=", 2);
         if (parts.length == 2 && parts[0] in data)
           data[parts[0]] = decodeURIComponent(parts[1]);
       }
@@ skipping 24 matching lines @@
           global.ext.onMessage._dispatch({
             type: "subscriptions.listen",
             action: match[1],
             args: Array.prototype.slice.call(arguments, 1)
           });
         }
       };
 
       switch (message.type)
       {
-        case "app.doclink":
-          respond("https://adblockplus.org/redirect?link=" + encodeURIComponent(message.args[0]));
+        case "app.get":
+          if (message.what == "issues")
+          {
+            var response = {seenDataCorruption: false, filterlistsReinitialized: false};
+            updateFromURL(response);
+
+            var info = {platform: "gecko", platformVersion: "34.0", application: "firefox", applicationVersion: "34.0"};
+            updateFromURL(info);
+            response.legacySafariVersion = (info.platform == "safari" && (
+              parseInt(info.platformVersion, 10) < 6 ||  // beforeload breaks websites in Safari 5
+              info.platformVersion == "6.1" ||           // extensions are broken in 6.1 and 7.0
+              info.platformVersion == "7.0"));
+
+            respond(response);
+          }
+          else if (message.what == "doclink")
+            respond("https://adblockplus.org/redirect?link=" + encodeURIComponent(message.link));
+          else
+            respond(null);
           break;
-        case "app.info":
-          var response = {platform: "gecko", platformVersion: "34.0", application: "firefox", applicationVersion: "34.0"};
-          getURLParameters(response);
-          respond(response);
-          break;
-        case "app.issues":
-          var response = {seenDataCorruption: false, filterlistsReinitialized: false};
-          getURLParameters(response);
-          respond(response);
-          break;
-        case "app.options":
-          window.open("http://example.com/options.html", "_blank");
+        case "app.open":
+          if (message.what == "options")
+            window.open("http://example.com/options.html", "_blank");
           break;
         case "subscriptions.get":
           respond(subscriptions);
           break;
         case "filters.blocked":
           var params = {blockedURLs: ""};
-          getURLParameters(params);
+          updateFromURL(params);
           var blocked = params.blockedURLs.split(",");
           respond(blocked.indexOf(message.url) >= 0);
           break;
         case "subscriptions.toggle":
           var index = subscriptions.indexOf(message.url);
           if (index >= 0)
           {
             subscriptions.splice(index, 1);
             dispatchListenerNotification("subscription.removed", message.url);
           }
@@ skipping 37 matching lines @@
 
         if (this._cancelable && result === false)
           break;
       }
 
       return result;
     }
   };
   global.ext.onMessage = new EventTarget();
 })(this);