chrome/browser/extensions/app_icon_loader.h

   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_