Added ad counting functionality

lib/prefs.js

 /*
  * This file is part of Adblock Plus <http://adblockplus.org/>,
  * Copyright (C) 2006-2013 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 @@
   patternsbackups: 5,
   patternsbackupinterval: 24,
   savestats: false,
   privateBrowsing: false,
   subscriptions_fallbackerrors: 5,
   subscriptions_fallbackurl: "https://adblockplus.org/getSubscription?version=%VERSION%&url=%SUBSCRIPTION%&downloadURL=%URL%&error=%ERROR%&channelStatus=%CHANNELSTATUS%&responseStatus=%RESPONSESTATUS%",
   subscriptions_autoupdate: true,
   subscriptions_exceptionsurl: "https://easylist-downloads.adblockplus.org/exceptionrules.txt",
   documentation_link: "https://adblockplus.org/redirect?link=%LINK%&lang=%LANG%",
   notificationdata: {},
-  notificationurl: "https://notification.adblockplus.org/notification.json"
+  notificationurl: "https://notification.adblockplus.org/notification.json",
+  stats_total: {}

[Wladimir Palant, 2013/09/18 09:44:41]

Why store an object when we really need only a single number?

[Thomas Greiner, 2013/09/19 09:42:29]

We agreed on extending it in the near future to provide more value to the user
than just showing the total number of blocked requests.

Therefore I decided on using an object which can be extended to resemble the
window statistics data that we're storing in Firefox:

{
  items: 0,
  hidden: 0,
  blocked: 0,
  whitelisted: 0,
  filters: {}
}

[Wladimir Palant, 2013/09/19 10:56:22]

I wonder what you have in mind here. Counting element hiding hits isn't possible
in Chrome (at least it isn't without impacting the performance) and storing the
number of total/whitelisted elements seems fairly useless.

[Thomas Greiner, 2013/09/20 15:09:50]

There are two categories of additional data that we could add:
- time-specific: today, this week, etc.
- type-specific: tracking, social, etc. (based on the filterlist the filter is
in)

 };
 
 let listeners = [];
 
 function defineProperty(key)
 {
   let value = null;
   Prefs.__defineGetter__(key, function()
   {
     if (value === null)
@@ skipping 46 matching lines @@
   removeListener: function(listener)
   {
     let index = listeners.indexOf(listener);
     if (index >= 0)
       listeners.splice(index, 1);
   },
 };
 
 for (let key in defaults)
   defineProperty(key);