fast_show_pickler.h revision a1401311d1ab56c4ed0a474bd38c108f75cb0cd9 
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_FAST_SHOW_PICKLER_H_
6#define CHROME_BROWSER_UI_APP_LIST_FAST_SHOW_PICKLER_H_
7
8#include <string>
9
10#include "base/memory/scoped_ptr.h"
11#include "base/pickle.h"
12#include "ui/app_list/app_list_model.h"
13
14// Functions for pickling/unpickling AppListModel for fast show. Fast show is
15// where the app list is put on the screen using data retrieved from a cache
16// before the extension system has loaded.
17class FastShowPickler {
18 public:
19  // The version that this pickler understands.
20  static const int kVersion;
21
22  // Pickles a subset of the data in |model| that is useful for doing a fast
23  // show of the app list.
24  static scoped_ptr<Pickle> PickleAppListModelForFastShow(
25      app_list::AppListModel* model);
26
27  // Given a Pickle created by PickleAppListModelForFastShow(), this creates an
28  // AppListModel that represents it.
29  static scoped_ptr<app_list::AppListModel> UnpickleAppListModelForFastShow(
30      Pickle* pickle);
31
32  // Copies parts that are needed to show the app list quickly on startup from
33  // |src| to |dest|.
34  static void CopyOver(
35      app_list::AppListModel* src, app_list::AppListModel* dest);
36
37 private:
38  // Private static methods allow friend access to AppListItem methods.
39  static scoped_ptr<app_list::AppListItem> UnpickleAppListItem(
40      PickleIterator* it);
41  static bool PickleAppListItem(Pickle* pickle, app_list::AppListItem* item);
42  static void CopyOverItem(app_list::AppListItem* src_item,
43                           app_list::AppListItem* dest_item);
44};
45
46#endif  // CHROME_BROWSER_UI_APP_LIST_FAST_SHOW_PICKLER_H_
47