Issue 4795 - Use modern JavaScript syntax

lib/compat.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/>.
  */
 
+"use strict";
+
 //
 // Module framework stuff
 //
 
 function require(module)
 {
   if (!(module in require.scopes))
   {
     let scope = {exports: {}};
     require.scopes[module] = require.modules[module](scope, scope.exports);
   }
   return require.scopes[module];
 }
 require.modules = Object.create(null);
 require.scopes = Object.create(null);
 
 function importAll(module, globalObj)
 {
-  var exports = require(module);
-  for (var key in exports)
+  let exports = require(module);
+  for (let key in exports)
     globalObj[key] = exports[key];
 }
 
-onShutdown = {
+let onShutdown = {
   done: false,
-  add: function() {},
-  remove: function() {}
+  add: () => {},
+  remove: () => {}
 };
 
 //
 // XPCOM emulation
 //
 
-var Components =
+let Components =
 {
   interfaces:
   {
     nsIFile: {DIRECTORY_TYPE: 0},
-    nsIFileURL: function() {},
-    nsIHttpChannel: function() {},
+    nsIFileURL: () => {},
+    nsIHttpChannel: () => {},
     nsITimer: {TYPE_REPEATING_SLACK: 0},
     nsIInterfaceRequestor: null,
     nsIChannelEventSink: null
   },
   classes:
   {
     "@mozilla.org/timer;1":
     {
-      createInstance: function()
-      {
-        return new FakeTimer();
-      }
+      createInstance: () => new FakeTimer()
     },
     "@mozilla.org/xmlextras/xmlhttprequest;1":
     {
-      createInstance: function()
-      {
-        return new XMLHttpRequest();
-      }
+      createInstance: () => new XMLHttpRequest()
     }
   },
   results: {},
   utils: {
-    import: function()
+    import: () =>
     {
     },
-    reportError: function(e)
+    reportError: e =>
     {
       console.error(e);
       console.trace();
     }
   },
   manager: null,
-  ID: function()
-  {
-    return null;
-  }
+  ID: () => null
 };
 const Cc = Components.classes;
 const Ci = Components.interfaces;
 const Cr = Components.results;
 const Cu = Components.utils;
 
-var XPCOMUtils =
+let XPCOMUtils =
 {
-  generateQI: function() {}
+  generateQI: () => {}
 };
 
 //
 // Fake nsIFile implementation for our I/O
 //
 
 function FakeFile(path)
 {
   this.path = path;
 }
@@ skipping 10 matching lines @@
   append: function(path)
   {
     this.path += path;
   },
   clone: function()
   {
     return new FakeFile(this.path);
   },
   get parent()
   {
-    return {create: function() {}};
+    return {create: () => {}};
   },
-  normalize: function() {}
+  normalize: () => {}
 };
 
 //
 // Services.jsm module emulation
 //
 
-var Services =
+let Services =
 {
   obs: {
-    addObserver: function() {},
-    removeObserver: function() {}
+    addObserver: () => {},
+    removeObserver: () => {}
   },
   vc: {
-    compare: function(v1, v2)
+    compare: (v1, v2) =>
     {
       function parsePart(s)
       {
         if (!s)
           return parsePart("0");
 
-        var part = {
+        let part = {
           numA: 0,
           strB: "",
           numC: 0,
           extraD: ""
         };
 
         if (s === "*")
         {
           part.numA = Number.MAX_VALUE;
           return part;
         }
 
-        var matches = s.match(/(\d*)(\D*)(\d*)(.*)/);
+        let matches = s.match(/(\d*)(\D*)(\d*)(.*)/);
         part.numA = parseInt(matches[1], 10) || part.numA;
         part.strB = matches[2] || part.strB;
         part.numC = parseInt(matches[3], 10) || part.numC;
         part.extraD = matches[4] || part.extraD;
 
         if (part.strB == "+")
         {
           part.numA++;
           part.strB = "pre";
         }
 
         return part;
       }
 
       function comparePartElement(s1, s2)
       {
         if (s1 === "" && s2 !== "")
           return 1;
         if (s1 !== "" && s2 === "")
           return -1;
         return s1 === s2 ? 0 : (s1 > s2 ? 1 : -1);
       }
 
       function compareParts(p1, p2)
       {
-        var result = 0;
-        var elements = ["numA", "strB", "numC", "extraD"];
-        elements.some(function(element)
+        let result = 0;
+        let elements = ["numA", "strB", "numC", "extraD"];
+        elements.some(element =>
         {
           result = comparePartElement(p1[element], p2[element]);
           return result;
         });
         return result;
       }
 
-      var parts1 = v1.split(".");
-      var parts2 = v2.split(".");
-      for (var i = 0; i < Math.max(parts1.length, parts2.length); i++)
+      let parts1 = v1.split(".");
+      let parts2 = v2.split(".");
+      for (let i = 0; i < Math.max(parts1.length, parts2.length); i++)
       {
-        var result = compareParts(parsePart(parts1[i]), parsePart(parts2[i]));
+        let result = compareParts(parsePart(parts1[i]), parsePart(parts2[i]));
         if (result)
           return result;
       }
       return 0;
     }
   }
 }
 
 //
 // FileUtils.jsm module emulation
 //
 
-var FileUtils =
+let FileUtils =
 {
   PERMS_DIRECTORY: 0
 };
 
 function FakeTimer()
 {
 }
 FakeTimer.prototype =
 {
   delay: 0,
   callback: null,
   initWithCallback: function(callback, delay)
   {
     this.callback = callback;
     this.delay = delay;
     this.scheduleTimeout();
   },
   scheduleTimeout: function()
   {
-    var me = this;
-    window.setTimeout(function()
+    window.setTimeout(() =>
     {
       try
       {
-        me.callback();
+        this.callback();
       }
       catch(e)
       {
         Cu.reportError(e);
       }
-      me.scheduleTimeout();
+      this.scheduleTimeout();
     }, this.delay);
   }
 };
 
 //
 // Add a channel property to XMLHttpRequest, Synchronizer needs it
 //
 
 XMLHttpRequest.prototype.channel =
 {
   status: -1,
   notificationCallbacks: {},
   loadFlags: 0,
   INHIBIT_CACHING: 0,
   VALIDATE_ALWAYS: 0,
   QueryInterface: function()
   {
     return this;
   }
 };