1 // Copyright (c) 2011 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_STATUS_UPDATER_H_ 6 #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_STATUS_UPDATER_H_ 7 8 #include <set> 9 10 #include "base/basictypes.h" 11 #include "base/gtest_prod_util.h" 12 #include "base/memory/weak_ptr.h" 13 14 class DownloadStatusUpdaterDelegate; 15 16 // Keeps track of download progress for the entire browser. 17 class DownloadStatusUpdater 18 : public base::SupportsWeakPtr<DownloadStatusUpdater> { 19 public: 20 DownloadStatusUpdater(); 21 ~DownloadStatusUpdater(); 22 23 void AddDelegate(DownloadStatusUpdaterDelegate* delegate); 24 void RemoveDelegate(DownloadStatusUpdaterDelegate* delegate); 25 26 // Updates the download status based on data from delegates. 27 void Update(); 28 29 private: 30 FRIEND_TEST_ALL_PREFIXES(DownloadStatusUpdaterTest, Basic); 31 FRIEND_TEST_ALL_PREFIXES(DownloadStatusUpdaterTest, OneDelegate); 32 FRIEND_TEST_ALL_PREFIXES(DownloadStatusUpdaterTest, MultipleDelegates); 33 34 // If the progress is known (i.e. we know the final size of all downloads), 35 // returns true and puts a percentage (in range [0-1]) in |progress|. 36 bool GetProgress(float* progress); 37 38 // Returns the number of downloads that are in progress. 39 int64 GetInProgressDownloadCount(); 40 41 typedef std::set<DownloadStatusUpdaterDelegate*> DelegateSet; 42 DelegateSet delegates_; 43 44 DISALLOW_COPY_AND_ASSIGN(DownloadStatusUpdater); 45 }; 46 47 #endif // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_STATUS_UPDATER_H_ 48
