Refactor DragDownloadFile so that it can be used by both Windows and MacOSX.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/572014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@38545 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 46 insertions, 0 deletions

diff --git a/app/download_file_interface.h b/app/download_file_interface.h
new file mode 100644
index 0000000..13d2dcf
--- /dev/null
+++ b/app/download_file_interface.h
@@ -0,0 +1,46 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef APP_DOWNLOAD_FILE_INTERFACE_H_
+#define APP_DOWNLOAD_FILE_INTERFACE_H_
+
+#include "build/build_config.h"
+
+#include "base/basictypes.h"
+#include "base/ref_counted.h"
+
+#if defined(OS_WIN)
+#include <objidl.h>
+#endif
+
+class FilePath;
+
+// Defines the interface to observe the status of file download.
+class DownloadFileObserver
+    : public base::RefCountedThreadSafe<DownloadFileObserver> {
+ public:
+  virtual void OnDownloadCompleted(const FilePath& file_path) = 0;
+  virtual void OnDownloadAborted() = 0;
+
+ protected:
+  friend class base::RefCountedThreadSafe<DownloadFileObserver>;
+  virtual ~DownloadFileObserver() {}
+};
+
+// Defines the interface to control how a file is downloaded.
+class DownloadFileProvider
+    : public base::RefCountedThreadSafe<DownloadFileProvider> {
+ public:
+  virtual bool Start(DownloadFileObserver* observer) = 0;
+  virtual void Stop() = 0;
+#if defined(OS_WIN)
+  virtual IStream* GetStream() = 0;
+#endif
+
+ protected:
+  friend class base::RefCountedThreadSafe<DownloadFileProvider>;
+  virtual ~DownloadFileProvider() {}
+};
+
+#endif  // APP_DOWNLOAD_FILE_INTERFACE_H_