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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_ACTION_ICON_FACTORY_H_
#define CHROME_BROWSER_EXTENSIONS_EXTENSION_ACTION_ICON_FACTORY_H_
#include "base/memory/scoped_ptr.h"
#include "base/scoped_observer.h"
#include "extensions/browser/extension_icon_image.h"
class ExtensionAction;
class ExtensionIconSet;
class Profile;
namespace extensions {
class Extension;
}
// Used to get an icon to be used in the UI for an extension action.
// If the extension action icon is the default icon defined in the extension's
// manifest, it is loaded using extensions::IconImage. This icon can be loaded
// asynchronously. The factory observes underlying IconImage and notifies its
// own observer when the icon image changes.
class ExtensionActionIconFactory : public extensions::IconImage::Observer {
public:
class Observer {
public:
virtual ~Observer() {}
// Called when the underlying icon image changes.
virtual void OnIconUpdated() = 0;
};
// Observer should outlive this.
ExtensionActionIconFactory(Profile* profile,
const extensions::Extension* extension,
ExtensionAction* action,
Observer* observer);
~ExtensionActionIconFactory() override;
// extensions::IconImage override.
void OnExtensionIconImageChanged(extensions::IconImage* image) override;
void OnExtensionIconImageDestroyed(extensions::IconImage* image) override;
// Gets the extension action icon for the tab.
// If there is an icon set using |SetIcon|, that icon is returned.
// Else, if there is a default icon set for the extension action, the icon is
// created using IconImage. Observer is triggered wheniever the icon gets
// updated.
// Else, extension favicon is returned.
// In all cases, action's attention and animation icon transformations are
// applied on the icon.
gfx::Image GetIcon(int tab_id);
private:
const extensions::Extension* extension_;
const ExtensionAction* action_;
Observer* observer_;
ScopedObserver<extensions::IconImage, extensions::IconImage::Observer>
icon_image_observer_;
DISALLOW_COPY_AND_ASSIGN(ExtensionActionIconFactory);
};
#endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_ACTION_ICON_FACTORY_H_
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