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| 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 |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_ICON_IMAGE_H_ |
| 6 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_ICON_IMAGE_H_ |
| 7 |
| 8 #include <map> |
| 9 #include <string> |
| 10 |
| 11 #include "base/basictypes.h" |
| 12 #include "chrome/browser/extensions/image_loading_tracker.h" |
| 13 #include "chrome/common/extensions/extension_icon_set.h" |
| 14 #include "content/public/browser/notification_observer.h" |
| 15 #include "content/public/browser/notification_registrar.h" |
| 16 #include "ui/gfx/image/image_skia.h" |
| 17 |
| 18 namespace extensions { |
| 19 class Extension; |
| 20 } |
| 21 |
| 22 namespace gfx { |
| 23 class Size; |
| 24 } |
| 25 |
| 26 namespace extensions { |
| 27 |
| 28 // A class that provides an ImageSkia for UI code to use. It handles extension |
| 29 // icon resource loading, screen scale factor change etc. UI code that uses |
| 30 // extension icon should host this class and be its observer. ExtensionIconImage |
| 31 // should be outlived by the observer. In painting code, UI code paints with the |
| 32 // ImageSkia provided by this class. If required extension icon resource is not |
| 33 // present, this class uses ImageLoadingTracker to load it and call on its |
| 34 // observer interface when the resource is loaded. |
| 35 class IconImage : public ImageLoadingTracker::Observer, |
| 36 public content::NotificationObserver { |
| 37 public: |
| 38 class Observer { |
| 39 public: |
| 40 // Invoked when a new image rep for an additional scale factor |
| 41 // is loaded and added to |image|. |
| 42 virtual void OnExtensionIconImageChanged(IconImage* image) = 0; |
| 43 |
| 44 // Invoked when the icon image couldn't be loaded. |
| 45 virtual void OnIconImageLoadFailed(IconImage* image, |
| 46 ui::ScaleFactor scale_factor) = 0; |
| 47 |
| 48 protected: |
| 49 virtual ~Observer() {} |
| 50 }; |
| 51 |
| 52 IconImage(const Extension* extension, |
| 53 const ExtensionIconSet& icon_set, |
| 54 int resource_size_in_dip, |
| 55 Observer* observer); |
| 56 virtual ~IconImage(); |
| 57 |
| 58 const gfx::ImageSkia& image_skia() const { return image_skia_; } |
| 59 |
| 60 private: |
| 61 class Source; |
| 62 |
| 63 typedef std::map<int, ui::ScaleFactor> LoadMap; |
| 64 |
| 65 // Loads bitmap for additional scale factor. |
| 66 void LoadImageForScaleFactor(ui::ScaleFactor scale_factor); |
| 67 |
| 68 // ImageLoadingTracker::Observer overrides: |
| 69 virtual void OnImageLoaded(const gfx::Image& image, |
| 70 const std::string& extension_id, |
| 71 int index) OVERRIDE; |
| 72 |
| 73 // content::NotificationObserver overrides: |
| 74 virtual void Observe(int type, |
| 75 const content::NotificationSource& source, |
| 76 const content::NotificationDetails& details) OVERRIDE; |
| 77 |
| 78 const Extension* extension_; |
| 79 const ExtensionIconSet& icon_set_; |
| 80 const int resource_size_in_dip_; |
| 81 const gfx::Size desired_size_in_dip_; |
| 82 |
| 83 Observer* observer_; |
| 84 |
| 85 Source* source_; // Owned by ImageSkia storage. |
| 86 gfx::ImageSkia image_skia_; |
| 87 |
| 88 ImageLoadingTracker tracker_; |
| 89 content::NotificationRegistrar registrar_; |
| 90 |
| 91 LoadMap load_map_; |
| 92 |
| 93 DISALLOW_COPY_AND_ASSIGN(IconImage); |
| 94 }; |
| 95 |
| 96 } // namespace extensions |
| 97 |
| 98 #endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_ICON_IMAGE_H_ |
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