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 12 namespace wallpaper_api_util { 13 extern const char kCancelWallpaperMessage[]; 14 ash::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. 19 class 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