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 13 // This class handles the task of observing a single DownloadManager for 14 // notifying the UI when a new download should be displayed in the UI. 15 // It invokes the OnNewDownloadReady() method of hte Delegate when the 16 // target path is available for a new download. 17 class DownloadUIController : public AllDownloadItemNotifier::Observer { 18 public: 19 // The delegate is responsible for figuring out how to notify the UI. 20 class Delegate { 21 public: 22 virtual ~Delegate(); 23 24 // This method is invoked to notify the UI of the new download |item|. Note 25 // that |item| may be in any state by the time this method is invoked. 26 virtual void OnNewDownloadReady(content::DownloadItem* item) = 0; 27 }; 28 29 // |manager| is the download manager to observe for new downloads. If 30 // |delegate.get()| is NULL, then the default delegate is constructed. 31 // 32 // On Android the default delegate notifies DownloadControllerAndroid. On 33 // other platforms the target of the notification is a Browser object. 34 // 35 // Currently explicit delegates are only used for testing. 36 DownloadUIController(content::DownloadManager* manager, 37 scoped_ptr<Delegate> delegate); 38 39 virtual ~DownloadUIController(); 40 41 private: 42 virtual void OnDownloadCreated(content::DownloadManager* manager, 43 content::DownloadItem* item) OVERRIDE; 44 virtual void OnDownloadUpdated(content::DownloadManager* manager, 45 content::DownloadItem* item) OVERRIDE; 46 47 AllDownloadItemNotifier download_notifier_; 48 49 scoped_ptr<Delegate> delegate_; 50 51 DISALLOW_COPY_AND_ASSIGN(DownloadUIController); 52 }; 53 54 #endif // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_UI_CONTROLLER_H_ 55