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
12namespace gfx {
13class ImageSkia;
14}
15
16namespace extensions {
17
18// Interface used to load app icons. This is in its own class so that it can
19// be mocked.
20class 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