Index: chrome/browser/extensions/extension_icon_image.h |
diff --git a/chrome/browser/extensions/extension_icon_image.h b/chrome/browser/extensions/extension_icon_image.h |
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+// Copyright (c) 2012 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_ICON_IMAGE_H_ |
+#define CHROME_BROWSER_EXTENSIONS_EXTENSION_ICON_IMAGE_H_ |
+ |
+#include <map> |
+#include <string> |
+ |
+#include "base/basictypes.h" |
+#include "chrome/browser/extensions/image_loading_tracker.h" |
+#include "chrome/common/extensions/extension_icon_set.h" |
+#include "content/public/browser/notification_observer.h" |
+#include "content/public/browser/notification_registrar.h" |
+#include "ui/gfx/image/image_skia.h" |
+ |
+namespace extensions { |
+class Extension; |
+} |
+ |
+namespace gfx { |
+class Size; |
+} |
+ |
+namespace extensions { |
+ |
+// A class that provides an ImageSkia for UI code to use. It handles extension |
+// icon resource loading, screen scale factor change etc. UI code that uses |
+// extension icon should host this class and be its observer. ExtensionIconImage |
+// should be outlived by the observer. In painting code, UI code paints with the |
+// ImageSkia provided by this class. If required extension icon resource is not |
+// present, this class uses ImageLoadingTracker to load it and call on its |
+// observer interface when the resource is loaded. |
+class IconImage : public ImageLoadingTracker::Observer, |
+ public content::NotificationObserver { |
+ public: |
+ class Observer { |
+ public: |
+ // Invoked when a new image rep for an additional scale factor |
+ // is loaded and added to |image|. |
+ virtual void OnExtensionIconImageChanged(IconImage* image) = 0; |
+ |
+ // Invoked when the icon image couldn't be loaded. |
+ virtual void OnIconImageLoadFailed(IconImage* image, |
+ ui::ScaleFactor scale_factor) = 0; |
+ |
+ protected: |
+ virtual ~Observer() {} |
+ }; |
+ |
+ IconImage(const Extension* extension, |
+ const ExtensionIconSet& icon_set, |
+ int resource_size_in_dip, |
+ Observer* observer); |
+ virtual ~IconImage(); |
+ |
+ const gfx::ImageSkia& image_skia() const { return image_skia_; } |
+ |
+ private: |
+ class Source; |
+ |
+ typedef std::map<int, ui::ScaleFactor> LoadMap; |
+ |
+ // Loads bitmap for additional scale factor. |
+ void LoadImageForScaleFactor(ui::ScaleFactor scale_factor); |
+ |
+ // ImageLoadingTracker::Observer overrides: |
+ virtual void OnImageLoaded(const gfx::Image& image, |
+ const std::string& extension_id, |
+ int index) OVERRIDE; |
+ |
+ // content::NotificationObserver overrides: |
+ virtual void Observe(int type, |
+ const content::NotificationSource& source, |
+ const content::NotificationDetails& details) OVERRIDE; |
+ |
+ const Extension* extension_; |
+ const ExtensionIconSet& icon_set_; |
+ const int resource_size_in_dip_; |
+ const gfx::Size desired_size_in_dip_; |
+ |
+ Observer* observer_; |
+ |
+ Source* source_; // Owned by ImageSkia storage. |
+ gfx::ImageSkia image_skia_; |
+ |
+ ImageLoadingTracker tracker_; |
+ content::NotificationRegistrar registrar_; |
+ |
+ LoadMap load_map_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(IconImage); |
+}; |
+ |
+} // namespace extensions |
+ |
+#endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_ICON_IMAGE_H_ |