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 UI_BASE_DRAGDROP_DOWNLOAD_FILE_INTERFACE_H_ 6 #define UI_BASE_DRAGDROP_DOWNLOAD_FILE_INTERFACE_H_ 7 8 #include "build/build_config.h" 9 10 #include "base/basictypes.h" 11 #include "base/memory/ref_counted.h" 12 13 #include "ui/base/ui_export.h" 14 15 #if defined(OS_WIN) 16 #include <objidl.h> 17 #endif 18 19 namespace base { 20 class FilePath; 21 } 22 23 namespace ui { 24 25 // TODO(benjhayden, anybody): Do these need to be RefCountedThreadSafe? 26 27 // Defines the interface to observe the status of file download. 28 class UI_EXPORT DownloadFileObserver 29 : public base::RefCountedThreadSafe<DownloadFileObserver> { 30 public: 31 virtual void OnDownloadCompleted(const base::FilePath& file_path) = 0; 32 virtual void OnDownloadAborted() = 0; 33 34 protected: 35 friend class base::RefCountedThreadSafe<DownloadFileObserver>; 36 virtual ~DownloadFileObserver() {} 37 }; 38 39 // Defines the interface to control how a file is downloaded. 40 class UI_EXPORT DownloadFileProvider 41 : public base::RefCountedThreadSafe<DownloadFileProvider> { 42 public: 43 // Starts the download asynchronously and returns immediately. 44 virtual void Start(DownloadFileObserver* observer) = 0; 45 46 // Returns true if the download succeeded and false otherwise. Waits until the 47 // download is completed/cancelled/interrupted before returning. 48 virtual bool Wait() = 0; 49 50 // Cancels the download. 51 virtual void Stop() = 0; 52 53 protected: 54 friend class base::RefCountedThreadSafe<DownloadFileProvider>; 55 virtual ~DownloadFileProvider() {} 56 }; 57 58 } // namespace ui 59 60 #endif // UI_BASE_DRAGDROP_DOWNLOAD_FILE_INTERFACE_H_ 61
