wallpaper_api.h revision d0247b1b59f9c528cb6df88b4f2b9afaf80d181e 
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_CHROMEOS_EXTENSIONS_WALLPAPER_API_H_
6#define CHROME_BROWSER_CHROMEOS_EXTENSIONS_WALLPAPER_API_H_
7
8#include "ash/desktop_background/desktop_background_controller.h"
9#include "base/threading/sequenced_worker_pool.h"
10#include "chrome/browser/chromeos/extensions/wallpaper_function_base.h"
11
12// Implementation of chrome.wallpaper.setWallpaper API.
13// After this API being called, a jpeg encoded wallpaper will be saved to
14// /home/chronos/custom_wallpaper/{resolution}/{username}/file_name. The
15// wallpaper can then persistent after Chrome restart. New call to this API
16// will replace the previous saved wallpaper with new one.
17// Note: For security reason, the original encoded wallpaper image is not saved
18// directly. It is decoded and re-encoded to jpeg format before saved to file
19// system.
20class WallpaperSetWallpaperFunction : public WallpaperFunctionBase {
21 public:
22  DECLARE_EXTENSION_FUNCTION("wallpaper.setWallpaper",
23                             WALLPAPER_SETWALLPAPER)
24
25  WallpaperSetWallpaperFunction();
26
27 protected:
28  virtual ~WallpaperSetWallpaperFunction();
29
30  // AsyncExtensionFunction overrides.
31  virtual bool RunImpl() OVERRIDE;
32
33 private:
34  virtual void OnWallpaperDecoded(const gfx::ImageSkia& wallpaper) OVERRIDE;
35
36  // Generates thumbnail of custom wallpaper. A simple STRETCH is used for
37  // generating thumbnail.
38  void GenerateThumbnail(const base::FilePath& thumbnail_path,
39                         scoped_ptr<gfx::ImageSkia> image);
40
41  // Thumbnail is ready. Calls api function javascript callback.
42  void ThumbnailGenerated(base::RefCountedBytes* data);
43
44  // Layout of the downloaded wallpaper.
45  ash::WallpaperLayout layout_;
46
47  // True if need to generate thumbnail and pass to callback.
48  bool generate_thumbnail_;
49
50  // Unique file name of the custom wallpaper.
51  std::string file_name_;
52
53  // Email address of logged in user.
54  // TODO(bshe): User's email should not be used as part of wallpaper file path.
55  // http://crbug.com/287020
56  std::string email_;
57
58  // String representation of downloaded wallpaper.
59  std::string image_data_;
60
61  // Sequence token associated with wallpaper operations. Shared with
62  // WallpaperManager.
63  base::SequencedWorkerPool::SequenceToken sequence_token_;
64};
65
66#endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_WALLPAPER_API_H_
67
68