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// Copyright 2013 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_DOWNLOAD_DOWNLOAD_UI_CONTROLLER_H_
#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_UI_CONTROLLER_H_
#include <set>
#include "base/memory/scoped_ptr.h"
#include "chrome/browser/download/all_download_item_notifier.h"
// This class handles the task of observing a single DownloadManager for
// notifying the UI when a new download should be displayed in the UI.
// It invokes the OnNewDownloadReady() method of hte Delegate when the
// target path is available for a new download.
class DownloadUIController : public AllDownloadItemNotifier::Observer {
public:
// The delegate is responsible for figuring out how to notify the UI.
class Delegate {
public:
virtual ~Delegate();
// This method is invoked to notify the UI of the new download |item|. Note
// that |item| may be in any state by the time this method is invoked.
virtual void OnNewDownloadReady(content::DownloadItem* item) = 0;
};
// |manager| is the download manager to observe for new downloads. If
// |delegate.get()| is NULL, then the default delegate is constructed.
//
// On Android the default delegate notifies DownloadControllerAndroid. On
// other platforms the target of the notification is a Browser object.
//
// Currently explicit delegates are only used for testing.
DownloadUIController(content::DownloadManager* manager,
scoped_ptr<Delegate> delegate);
~DownloadUIController() override;
private:
void OnDownloadCreated(content::DownloadManager* manager,
content::DownloadItem* item) override;
void OnDownloadUpdated(content::DownloadManager* manager,
content::DownloadItem* item) override;
AllDownloadItemNotifier download_notifier_;
scoped_ptr<Delegate> delegate_;
DISALLOW_COPY_AND_ASSIGN(DownloadUIController);
};
#endif // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_UI_CONTROLLER_H_
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