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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 // | 4 // |
| 5 // Class for finding and caching Windows explorer icons. The IconManager | 5 // Class for finding and caching Windows explorer icons. The IconManager |
| 6 // lives on the UI thread but performs icon extraction work on the file thread | 6 // lives on the UI thread but performs icon extraction work on the file thread |
| 7 // to avoid blocking the UI thread with potentially expensive COM and disk | 7 // to avoid blocking the UI thread with potentially expensive COM and disk |
| 8 // operations. | 8 // operations. |
| 9 // | 9 // |
| 10 // Terminology | 10 // Terminology |
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| 41 // | 41 // |
| 42 // Icon bitmaps returned should be treated as const since they may be referenced | 42 // Icon bitmaps returned should be treated as const since they may be referenced |
| 43 // by other clients. Make a copy of the icon if you need to modify it. | 43 // by other clients. Make a copy of the icon if you need to modify it. |
| 44 | 44 |
| 45 #ifndef CHROME_BROWSER_ICON_MANAGER_H_ | 45 #ifndef CHROME_BROWSER_ICON_MANAGER_H_ |
| 46 #define CHROME_BROWSER_ICON_MANAGER_H_ | 46 #define CHROME_BROWSER_ICON_MANAGER_H_ |
| 47 | 47 |
| 48 #include <map> | 48 #include <map> |
| 49 | 49 |
| 50 #include "base/hash_tables.h" | 50 #include "base/hash_tables.h" |
| 51 #include "chrome/browser/cancelable_request.h" | 51 #include "chrome/browser/common/cancelable_request.h" |
| 52 #include "chrome/browser/icon_loader.h" | 52 #include "chrome/browser/icon_loader.h" |
| 53 #include "ui/gfx/image/image.h" | 53 #include "ui/gfx/image/image.h" |
| 54 | 54 |
| 55 class FilePath; | 55 class FilePath; |
| 56 | 56 |
| 57 class IconManager : public IconLoader::Delegate, | 57 class IconManager : public IconLoader::Delegate, |
| 58 public CancelableRequestProvider { | 58 public CancelableRequestProvider { |
| 59 public: | 59 public: |
| 60 IconManager(); | 60 IconManager(); |
| 61 virtual ~IconManager(); | 61 virtual ~IconManager(); |
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| 107 | 107 |
| 108 // Asynchronous requests that have not yet been completed. | 108 // Asynchronous requests that have not yet been completed. |
| 109 struct ClientRequest; | 109 struct ClientRequest; |
| 110 typedef std::map<IconLoader*, ClientRequest> ClientRequests; | 110 typedef std::map<IconLoader*, ClientRequest> ClientRequests; |
| 111 ClientRequests requests_; | 111 ClientRequests requests_; |
| 112 | 112 |
| 113 DISALLOW_COPY_AND_ASSIGN(IconManager); | 113 DISALLOW_COPY_AND_ASSIGN(IconManager); |
| 114 }; | 114 }; |
| 115 | 115 |
| 116 #endif // CHROME_BROWSER_ICON_MANAGER_H_ | 116 #endif // CHROME_BROWSER_ICON_MANAGER_H_ |
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