chrome/browser/chromeos/extensions/default_app_order.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_CHROMEOS_EXTENSIONS_DEFAULT_APP_ORDER_H_
   6 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_DEFAULT_APP_ORDER_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/basictypes.h"
  12 #include "base/synchronization/waitable_event.h"
  13
  14 namespace chromeos {
  15 namespace default_app_order {
  16
  17 // ExternalLoader checks FILE_DEFAULT_APP_ORDER and loads it if the file
  18 // exists. Otherwise, it uses the default built-in order. The file loading runs
  19 // asynchronously on start up except for the browser restart path, in which
  20 // case, start up will wait for the file check to finish because user profile
  21 // might need to access the ordinals data.
  22 class ExternalLoader {
  23  public:
  24   // Constructs an ExternalLoader and starts file loading. |async| is true to
  25   // load the file asynchronously on the blocking pool.
  26   explicit ExternalLoader(bool async);
  27   ~ExternalLoader();
  28
  29   const std::vector<std::string>& GetAppIds();
  30
  31  private:
  32   void Load();
  33
  34   // A vector of app id strings that defines the default order of apps.
  35   std::vector<std::string> app_ids_;
  36
  37   base::WaitableEvent loaded_;
  38
  39   DISALLOW_COPY_AND_ASSIGN(ExternalLoader);
  40 };
  41
  42 // Gets the ordered list of app ids.
  43 void Get(std::vector<std::string>* app_ids);
  44
  45 }  // namespace default_app_order
  46 }  // namespace chromeos
  47
  48 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_DEFAULT_APP_ORDER_H_