Issue 3823 - Split up message responder code

popup.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 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/>.
  */
 
 var backgroundPage = ext.backgroundPage.getWindow();
 var require = backgroundPage.require;
 
 var Filter = require("filterClasses").Filter;
 var FilterStorage = require("filterStorage").FilterStorage;
 var Prefs = require("prefs").Prefs;
 var checkWhitelisted = require("whitelisting").checkWhitelisted;
 var getDecodedHostname = require("url").getDecodedHostname;
-var port = require("messaging").port;
 
 var page = null;
 
 function onLoad()
 {
   ext.pages.query({active: true, lastFocusedWindow: true}, function(pages)
   {
     page = pages[0];
 
     // Mark page as 'local' or 'nohtml' to hide non-relevant elements
     if (!page || (page.url.protocol != "http:" &&
                   page.url.protocol != "https:"))
       document.body.classList.add("local");
     else if (!backgroundPage.htmlPages.has(page))
+    {
       document.body.classList.add("nohtml");
+      require("messaging").getPort(window).on(
+        "composer.ready", function(message, sender)
+        {
+          if (sender.page.id == page.id)
+            document.body.classList.remove("nohtml");
+        }
+      );
+    }
 
     // Ask content script whether clickhide is active. If so, show cancel button.
     // If that isn't the case, ask background.html whether it has cached filters. If so,
     // ask the user whether she wants those filters.
     // Otherwise, we are in default state.
     if (page)
     {
       if (checkWhitelisted(page))
         document.body.classList.add("disabled");
 
       page.sendMessage({type: "composer.content.getState"}, function(response)
       {
         if (response && response.active)
           document.body.classList.add("clickhide-active");
       });
     }
   });
 
-  // Attach event listeners
-  port.on("composer.ready", onComposerReady);
   document.getElementById("enabled").addEventListener("click", toggleEnabled, false);
   document.getElementById("clickhide").addEventListener("click", activateClickHide, false);
   document.getElementById("clickhide-cancel").addEventListener("click", cancelClickHide, false);
   document.getElementById("options").addEventListener("click", function()
   {
     ext.showOptions();
   }, false);
 
   // Set up collapsing of menu items
   var collapsers = document.getElementsByClassName("collapse");
   for (var i = 0; i < collapsers.length; i++)
   {
     var collapser = collapsers[i];
     collapser.addEventListener("click", toggleCollapse, false);
     if (!Prefs[collapser.dataset.option])
       document.getElementById(collapser.dataset.collapsable).classList.add("collapsed");
   }
-}
-
-function onUnload()
-{
-  port.off("composer.ready", onComposerReady);
-}
-
-function onComposerReady(message, sender)
-{
-  if (sender.page.id == page.id)
-    document.body.classList.remove("nohtml");
 }
 
 function toggleEnabled()
 {
   var disabled = document.body.classList.toggle("disabled");
   if (disabled)
   {
     var host = getDecodedHostname(page.url).replace(/^www\./, "");
     var filter = Filter.fromText("@@||" + host + "^$document");
     if (filter.subscriptions.length && filter.disabled)
@@ skipping 39 matching lines @@
 }
 
 function toggleCollapse(event)
 {
   var collapser = event.currentTarget;
   Prefs[collapser.dataset.option] = !Prefs[collapser.dataset.option];
   collapser.parentNode.classList.toggle("collapsed");
 }
 
 document.addEventListener("DOMContentLoaded", onLoad, false);
-window.addEventListener("unload", onUnload, false);