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_FUNCTION_BASE_H_
6#define CHROME_BROWSER_CHROMEOS_EXTENSIONS_WALLPAPER_FUNCTION_BASE_H_
7
8#include "ash/desktop_background/desktop_background_controller.h"
9#include "extensions/browser/extension_function.h"
10#include "ui/gfx/image/image_skia.h"
11
12namespace wallpaper_api_util {
13extern const char kCancelWallpaperMessage[];
14ash::WallpaperLayout GetLayoutEnum(const std::string& layout);
15}  // namespace wallpaper_api_util
16
17// Wallpaper manager function base. It contains a image decoder to decode
18// wallpaper data.
19class WallpaperFunctionBase : public AsyncExtensionFunction {
20 public:
21  WallpaperFunctionBase();
22
23 protected:
24  virtual ~WallpaperFunctionBase();
25
26  // A class to decode JPEG file.
27  class UnsafeWallpaperDecoder;
28
29  // Holds an instance of WallpaperDecoder.
30  static UnsafeWallpaperDecoder* unsafe_wallpaper_decoder_;
31
32  // Starts to decode |data|. Must run on UI thread.
33  void StartDecode(const std::string& data);
34
35  // Handles cancel case. No error message should be set.
36  void OnCancel();
37
38  // Handles failure case. Sets error message.
39  void OnFailure(const std::string& error);
40
41 private:
42  virtual void OnWallpaperDecoded(const gfx::ImageSkia& wallpaper) = 0;
43};
44
45#endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_WALLPAPER_FUNCTION_BASE_H_
46