Issue 3851 - Implement subscribe link handling via process scripts

lib/ui.js

Index: lib/ui.js
===================================================================
--- a/lib/ui.js
+++ b/lib/ui.js
@@ -14,16 +14,17 @@
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 Cu.import("resource://gre/modules/XPCOMUtils.jsm");
 Cu.import("resource://gre/modules/Services.jsm");
 
 let {Utils} = require("utils");
+let {port} = require("messaging");
 let {Prefs} = require("prefs");
 let {Policy} = require("contentPolicy");
 let {FilterStorage} = require("filterStorage");
 let {FilterNotifier} = require("filterNotifier");
 let {RequestNotifier} = require("requestNotifier");
 let {Filter} = require("filterClasses");
 let {Subscription, SpecialSubscription, DownloadableSubscription} = require("subscriptionClasses");
 let {Synchronizer} = require("synchronizer");
@@ -440,31 +441,18 @@ let UI = exports.UI =
         return;
 
       this._showNotification(window, button, notification);
     });
 
     // Add "anti-adblock messages" notification
     initAntiAdblockNotification();
 
-    // Frame script URL has to be randomized due to caching
-    // (see https://bugzilla.mozilla.org/show_bug.cgi?id=1051238)
-    let frameScript = "chrome://adblockplus/content/subscribeLinkHandler.js?" + Math.random();
-
     // Initialize subscribe link handling
-    let callback = this.subscribeLinkClicked.bind(this);
-    let messageManager = Cc["@mozilla.org/globalmessagemanager;1"]
-                           .getService(Ci.nsIMessageListenerManager);
-    messageManager.loadFrameScript(frameScript, true);
-    messageManager.addMessageListener("AdblockPlus:SubscribeLink", callback);
-    onShutdown.add(() => {
-      messageManager.broadcastAsyncMessage("AdblockPlus:Shutdown", frameScript);
-      messageManager.removeDelayedFrameScript(frameScript);
-      messageManager.removeMessageListener("AdblockPlus:SubscribeLink", callback);
-    });
+    port.on("subscribeLinkClick", data => this.subscribeLinkClicked(data));
 
     // Execute first-run actions if a window is open already, otherwise it
     // will happen in applyToWindow() when a window is opened.
     this.firstRunActions(this.currentWindow);
   },
 
   addToolbarButton: function()
   {
@@ -926,22 +914,22 @@ let UI = exports.UI =
       }, false);
       request.send();
     }
     else
       notifyUser();
   },
 
   /**
-   * Called whenever subscribeLinkHandler.js intercepts clicks on abp: links
+   * Called whenever child/subscribeLinks module intercepts clicks on abp: links
    * as well as links to subscribe.adblockplus.org.
    */
-  subscribeLinkClicked: function(message)
+  subscribeLinkClicked: function({title, url,
+      mainSubscriptionTitle, mainSubscriptionURL})
   {
-    let {title, url, mainSubscriptionTitle, mainSubscriptionURL} = message.data;
     if (!url)
       return;
 
     // Default title to the URL
     if (!title)
       title = url;
 
     // Main subscription needs both title and URL