1// Copyright 2013 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_DOWNLOAD_DOWNLOAD_UI_CONTROLLER_H_ 6#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_UI_CONTROLLER_H_ 7 8#include <set> 9 10#include "base/memory/scoped_ptr.h" 11#include "chrome/browser/download/all_download_item_notifier.h" 12 13class Profile; 14 15namespace content { 16class WebContents; 17} 18 19// This class handles the task of observing for download notifications and 20// notifying the UI when a new download should be displayed in the UI. 21// 22// This class monitors each IN_PROGRESS download that is created (for which 23// OnDownloadCreated is called) until: 24// - it is assigned a target path or 25// - is interrupted. 26// Then the NotifyDownloadStarting() method of the Delegate is invoked. 27class DownloadUIController : public AllDownloadItemNotifier::Observer { 28 public: 29 // The delegate is responsible for figuring out how to notify the UI. 30 class Delegate { 31 public: 32 virtual ~Delegate(); 33 virtual void NotifyDownloadStarting(content::DownloadItem* item) = 0; 34 }; 35 36 // |manager| is the download manager to observe for new downloads. If 37 // |delegate.get()| is NULL, then the default delegate is constructed. 38 // 39 // On Android the default delegate notifies DownloadControllerAndroid. On 40 // other platforms the target of the notification is a Browser object. 41 // 42 // Currently explicit delegates are only used for testing. 43 DownloadUIController(content::DownloadManager* manager, 44 scoped_ptr<Delegate> delegate); 45 46 virtual ~DownloadUIController(); 47 48 private: 49 virtual void OnDownloadCreated(content::DownloadManager* manager, 50 content::DownloadItem* item) OVERRIDE; 51 virtual void OnDownloadUpdated(content::DownloadManager* manager, 52 content::DownloadItem* item) OVERRIDE; 53 54 AllDownloadItemNotifier download_notifier_; 55 56 scoped_ptr<Delegate> delegate_; 57 58 DISALLOW_COPY_AND_ASSIGN(DownloadUIController); 59}; 60 61#endif // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_UI_CONTROLLER_H_ 62