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_ACTION_ICON_FACTORY_H_ 6 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_ACTION_ICON_FACTORY_H_ 7 8 #include "base/memory/scoped_ptr.h" 9 #include "extensions/browser/extension_icon_image.h" 10 11 class ExtensionAction; 12 class ExtensionIconSet; 13 class Profile; 14 15 namespace extensions { 16 class Extension; 17 } 18 19 // Used to get an icon to be used in the UI for an extension action. 20 // If the extension action icon is the default icon defined in the extension's 21 // manifest, it is loaded using extensions::IconImage. This icon can be loaded 22 // asynchronously. The factory observes underlying IconImage and notifies its 23 // own observer when the icon image changes. 24 class ExtensionActionIconFactory : public extensions::IconImage::Observer { 25 public: 26 class Observer { 27 public: ~Observer()28 virtual ~Observer() {} 29 // Called when the underlying icon image changes. 30 virtual void OnIconUpdated() = 0; 31 }; 32 33 // Observer should outlive this. 34 ExtensionActionIconFactory(Profile* profile, 35 const extensions::Extension* extension, 36 const ExtensionAction* action, 37 Observer* observer); 38 virtual ~ExtensionActionIconFactory(); 39 40 // extensions::IconImage override. 41 virtual void OnExtensionIconImageChanged( 42 extensions::IconImage* image) OVERRIDE; 43 44 // Gets the extension action icon for the tab. 45 // If there is an icon set using |SetIcon|, that icon is returned. 46 // Else, if there is a default icon set for the extension action, the icon is 47 // created using IconImage. Observer is triggered wheniever the icon gets 48 // updated. 49 // Else, extension favicon is returned. 50 // In all cases, action's attention and animation icon transformations are 51 // applied on the icon. 52 gfx::Image GetIcon(int tab_id); 53 54 private: 55 // Gets the icon that should be returned by |GetIcon| (without the attention 56 // and animation transformations). 57 gfx::ImageSkia GetBaseIconFromAction(int tab_id); 58 59 const extensions::Extension* extension_; 60 const ExtensionAction* action_; 61 Observer* observer_; 62 // Underlying icon image for the default icon. 63 scoped_ptr<extensions::IconImage> default_icon_; 64 65 DISALLOW_COPY_AND_ASSIGN(ExtensionActionIconFactory); 66 }; 67 68 #endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_ACTION_ICON_FACTORY_H_ 69