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// Copyright (c) 2012 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 CONTENT_BROWSER_DOWNLOAD_DRAG_DOWNLOAD_FILE_H_
#define CONTENT_BROWSER_DOWNLOAD_DRAG_DOWNLOAD_FILE_H_
#include "base/compiler_specific.h"
#include "base/files/file.h"
#include "base/files/file_path.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/run_loop.h"
#include "content/browser/download/download_file.h"
#include "content/common/content_export.h"
#include "content/public/browser/download_item.h"
#include "content/public/browser/download_manager.h"
#include "content/public/common/referrer.h"
#include "ui/base/dragdrop/download_file_interface.h"
#include "url/gurl.h"
namespace content {
class DownloadManager;
class WebContents;
// This class implements downloading a file via dragging virtual files out of
// the browser:
// http://lists.whatwg.org/htdig.cgi/whatwg-whatwg.org/2009-August/022118.html
// http://www.html5rocks.com/en/tutorials/casestudies/box_dnd_download/
class CONTENT_EXPORT DragDownloadFile : public ui::DownloadFileProvider {
public:
// On Windows, we need to download into a temporary file. On posix, we need to
// download into a file that has already been created, so only the UI
// thread is involved. |file| must be null on windows but non-null on
// posix systems. |file_path| is an absolute path on all systems.
DragDownloadFile(const base::FilePath& file_path,
base::File file,
const GURL& url,
const Referrer& referrer,
const std::string& referrer_encoding,
WebContents* web_contents);
// DownloadFileProvider methods.
virtual void Start(ui::DownloadFileObserver* observer) OVERRIDE;
virtual bool Wait() OVERRIDE;
virtual void Stop() OVERRIDE;
private:
class DragDownloadFileUI;
enum State {INITIALIZED, STARTED, SUCCESS, FAILURE};
virtual ~DragDownloadFile();
void DownloadCompleted(bool is_successful);
void CheckThread();
base::FilePath file_path_;
base::File file_;
base::MessageLoop* drag_message_loop_;
State state_;
scoped_refptr<ui::DownloadFileObserver> observer_;
base::RunLoop nested_loop_;
DragDownloadFileUI* drag_ui_;
base::WeakPtrFactory<DragDownloadFile> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(DragDownloadFile);
};
} // namespace content
#endif // CONTENT_BROWSER_DOWNLOAD_DRAG_DOWNLOAD_FILE_H_
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