app/download_file_interface.h

   1 // Copyright (c) 2009 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 APP_DOWNLOAD_FILE_INTERFACE_H_
   6 #define APP_DOWNLOAD_FILE_INTERFACE_H_
   7
   8 #include "build/build_config.h"
   9
  10 #include "base/basictypes.h"
  11 #include "base/ref_counted.h"
  12
  13 #if defined(OS_WIN)
  14 #include <objidl.h>
  15 #endif
  16
  17 class FilePath;
  18
  19 // Defines the interface to observe the status of file download.
  20 class DownloadFileObserver
  21     : public base::RefCountedThreadSafe<DownloadFileObserver> {
  22  public:
  23   virtual void OnDownloadCompleted(const FilePath& file_path) = 0;
  24   virtual void OnDownloadAborted() = 0;
  25
  26  protected:
  27   friend class base::RefCountedThreadSafe<DownloadFileObserver>;
  28   virtual ~DownloadFileObserver() {}
  29 };
  30
  31 // Defines the interface to control how a file is downloaded.
  32 class DownloadFileProvider
  33     : public base::RefCountedThreadSafe<DownloadFileProvider> {
  34  public:
  35   virtual bool Start(DownloadFileObserver* observer) = 0;
  36   virtual void Stop() = 0;
  37 #if defined(OS_WIN)
  38   virtual IStream* GetStream() = 0;
  39 #endif
  40
  41  protected:
  42   friend class base::RefCountedThreadSafe<DownloadFileProvider>;
  43   virtual ~DownloadFileProvider() {}
  44 };
  45
  46 #endif  // APP_DOWNLOAD_FILE_INTERFACE_H_