Issue 3472 - Made sure that "Block element" option is shown after page load

popup.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2015 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 isPageWhitelisted = require("whitelisting").isPageWhitelisted;
 var getDecodedHostname = require("url").getDecodedHostname;
 
 var page = null;
 
-function init()
+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))
@@ skipping 10 matching lines @@
 
       page.sendMessage({type: "get-clickhide-state"}, function(response)
       {
         if (response && response.active)
           document.body.classList.add("clickhide-active");
       });
     }
   });
 
   // Attach event listeners
+  ext.onMessage.addListener(onMessage);
   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");
   }
 }
-window.addEventListener("DOMContentLoaded", init, false);
+
+function onUnload()
+{
+  ext.onMessage.removeListener(onMessage);
+}
+
+function onMessage(message, sender, callback)
+{
+  if (message.type == "report-html-page" && 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)
       filter.disabled = false;
@@ skipping 36 matching lines @@
   document.body.classList.remove("clickhide-active");
   page.sendMessage({type: "clickhide-deactivate"});
 }
 
 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);