chrome/browser/ui/app_list/profile_loader.h

   1 // Copyright 2013 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_UI_APP_LIST_PROFILE_LOADER_H_
   6 #define CHROME_BROWSER_UI_APP_LIST_PROFILE_LOADER_H_
   7
   8 #include "base/callback.h"
   9 #include "base/memory/weak_ptr.h"
  10
  11 namespace base {
  12 class FilePath;
  13 }
  14
  15 class Profile;
  16 class ProfileLoaderUnittest;
  17 class ProfileStore;
  18 class ScopedKeepAlive;
  19
  20 // This class loads profiles asynchronously and calls the provided callback once
  21 // the profile is ready. Only the callback for the most recent load request is
  22 // called, and only if the load was successful.
  23 //
  24 // This is useful for loading profiles in response to user interaction where
  25 // only the latest requested profile is required.
  26 // TODO(koz): Merge this into AppListServiceImpl.
  27 class ProfileLoader {
  28  public:
  29   explicit ProfileLoader(ProfileStore* profile_store);
  30   ~ProfileLoader();
  31
  32   bool IsAnyProfileLoading() const;
  33   void InvalidatePendingProfileLoads();
  34   void LoadProfileInvalidatingOtherLoads(
  35       const base::FilePath& profile_file_path,
  36       base::Callback<void(Profile*)> callback);
  37
  38  private:
  39   friend class ::ProfileLoaderUnittest;
  40
  41   void OnProfileLoaded(int profile_load_sequence_id,
  42                        base::Callback<void(Profile*)> callback,
  43                        Profile* profile);
  44
  45   void IncrementPendingProfileLoads();
  46   void DecrementPendingProfileLoads();
  47
  48   ProfileStore* profile_store_;
  49   scoped_ptr<ScopedKeepAlive> keep_alive_;
  50   int profile_load_sequence_id_;
  51   int pending_profile_loads_;
  52
  53   base::WeakPtrFactory<ProfileLoader> weak_factory_;
  54
  55   DISALLOW_COPY_AND_ASSIGN(ProfileLoader);
  56 };
  57
  58 #endif  // CHROME_BROWSER_UI_APP_LIST_PROFILE_LOADER_H_