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// Copyright (c) 2011 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_UI_WEBUI_NTP_FAVICON_WEBUI_HANDLER_H_
#define CHROME_BROWSER_UI_WEBUI_NTP_FAVICON_WEBUI_HANDLER_H_
#pragma once
#include <map>
#include <string>
#include "base/basictypes.h"
#include "base/memory/ref_counted.h"
#include "chrome/browser/favicon/favicon_service.h"
#include "content/public/browser/web_ui_message_handler.h"
class ExtensionIconColorManager;
namespace base {
class ListValue;
}
class FaviconWebUIHandler : public content::WebUIMessageHandler {
public:
FaviconWebUIHandler();
virtual ~FaviconWebUIHandler();
// WebUIMessageHandler
virtual void RegisterMessages() OVERRIDE;
// Called from the JS to get the dominant color of a favicon. The first
// argument is a favicon URL, the second is the ID of the DOM node that is
// asking for it.
void HandleGetFaviconDominantColor(const base::ListValue* args);
// As above, but for an app tile. The sole argument is the extension ID.
void HandleGetAppIconDominantColor(const base::ListValue* args);
// Callback getting signal that an app icon is loaded.
void NotifyAppIconReady(const std::string& extension_id);
private:
// Called when favicon data is available from the history backend.
void OnFaviconDataAvailable(FaviconService::Handle request_handle,
history::FaviconData favicon);
CancelableRequestConsumerTSimple<int> consumer_;
// Map from request ID to DOM ID so we can make the appropriate callback when
// the favicon request comes back. This map exists because
// CancelableRequestConsumerTSimple only takes POD keys.
std::map<int, std::string> dom_id_map_;
// A counter to track ID numbers as we use them.
int id_;
// Raw PNG representation of the favicon to show when the favicon
// database doesn't have a favicon for a webpage.
scoped_refptr<RefCountedMemory> default_favicon_;
// Manage retrieval of icons from apps.
scoped_ptr<ExtensionIconColorManager> app_icon_color_manager_;
DISALLOW_COPY_AND_ASSIGN(FaviconWebUIHandler);
};
#endif // CHROME_BROWSER_UI_WEBUI_NTP_FAVICON_WEBUI_HANDLER_H_
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