Issue 256 - Home/End keys are broken when editing a filter

chrome/content/ui/filters-filteractions.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
@@ skipping 15 matching lines @@
    */
   init: function()
   {
     let me = this;
     this.treeElement.parentNode.addEventListener("keypress", function(event)
     {
       me.keyPress(event);
     }, true);
     this.treeElement.view = FilterView;
 
-    this.treeElement.inputField.addEventListener("keypress", function(event)
+    // Work around https://bugzilla.mozilla.org/show_bug.cgi?id=777832, don't
+    // allow the tree to receive keypress/keydown events triggered by cursor
+    // keys pressed in the editor, it will call preventDefault() on them.
+    let propagationStopper = function(event)
     {
-      // Prevent the tree from capturing cursor keys pressed in the input field
       if (event.keyCode >= event.DOM_VK_PAGE_UP && event.keyCode <= event.DOM_VK_DOWN)
         event.stopPropagation();
-    }, false);
+    };
+
+    this.treeElement.inputField.addEventListener("keypress", propagationStopper, false);
+    this.treeElement.inputField.addEventListener("keydown", propagationStopper, false);
 
     // Create a copy of the view menu
     function fixId(node, newId)
     {
       if (node.nodeType == node.ELEMENT_NODE)
       {
         if (node.hasAttribute("id"))
           node.setAttribute("id", node.getAttribute("id").replace(/\d+$/, newId));
 
         for (let i = 0, len = node.childNodes.length; i < len; i++)
@@ skipping 495 matching lines @@
       return;
 
     this.deleteItems(this.dragItems);
   }
 };
 
 window.addEventListener("load", function()
 {
   FilterActions.init();
 }, false);