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      1 // Copyright (c) 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_EXTENSIONS_APP_ICON_LOADER_H_
      6 #define CHROME_BROWSER_EXTENSIONS_APP_ICON_LOADER_H_
      7 
      8 #include <string>
      9 
     10 #include "base/basictypes.h"
     11 
     12 namespace gfx {
     13 class ImageSkia;
     14 }
     15 
     16 namespace extensions {
     17 
     18 // Interface used to load app icons. This is in its own class so that it can
     19 // be mocked.
     20 class AppIconLoader {
     21  public:
     22   class Delegate {
     23    public:
     24     virtual ~Delegate() {}
     25 
     26     // Called when the image for an app is loaded.
     27     virtual void SetAppImage(const std::string& id,
     28                              const gfx::ImageSkia& image) = 0;
     29   };
     30 
     31   AppIconLoader() {}
     32   virtual ~AppIconLoader() {}
     33 
     34   // Fetches the image for the specified id. When done (which may be
     35   // synchronous), this should invoke SetAppImage() on the delegate.
     36   virtual void FetchImage(const std::string& id) = 0;
     37 
     38   // Clears the image for the specified id.
     39   virtual void ClearImage(const std::string& id) = 0;
     40 
     41   // Updates the image for the specified id. This is called to re-create
     42   // the app icon with latest app state (enabled or disabled/terminiated).
     43   // SetAppImage() is called when done.
     44   virtual void UpdateImage(const std::string& id) = 0;
     45 
     46  private:
     47   DISALLOW_COPY_AND_ASSIGN(AppIconLoader);
     48 };
     49 
     50 }  // namespace extensions
     51 
     52 #endif  // CHROME_BROWSER_EXTENSIONS_APP_ICON_LOADER_H_
     53