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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/file_path.h"
#include "base/memory/linked_ptr.h"
#include "content/browser/download/download_file.h"
#include "content/public/browser/download_item.h"
#include "content/public/browser/download_manager.h"
#include "content/public/common/referrer.h"
#include "googleurl/src/gurl.h"
#include "net/base/file_stream.h"
#include "ui/base/dragdrop/download_file_interface.h"
#include "ui/base/ui_export.h"
namespace content {
class DownloadManager;
class WebContents;
}
namespace net {
class FileStream;
}
class DragDownloadFile
: public ui::DownloadFileProvider,
public content::DownloadManager::Observer,
public content::DownloadItem::Observer {
public:
// On Windows, we need to download into a temporary file. Two threads are
// involved: background drag-and-drop thread and UI thread.
// The first parameter file_name_or_path should contain file name while the
// second parameter file_stream should be NULL.
//
// On MacOSX, we need to download into a file stream that has already been
// created. Only UI thread is involved.
// The file path and file stream should be provided as the first two
// parameters.
DragDownloadFile(const FilePath& file_name_or_path,
linked_ptr<net::FileStream> file_stream,
const GURL& url,
const content::Referrer& referrer,
const std::string& referrer_encoding,
content::WebContents* web_contents);
// DownloadFileProvider methods.
// Called on drag-and-drop thread (Windows).
// Called on UI thread (MacOSX).
virtual bool Start(ui::DownloadFileObserver* observer) OVERRIDE;
virtual void Stop() OVERRIDE;
#if defined(OS_WIN)
virtual IStream* GetStream() { return NULL; }
#endif
// content::DownloadManager::Observer methods.
// Called on UI thread.
virtual void ModelChanged(content::DownloadManager* manager) OVERRIDE;
// content::DownloadItem::Observer methods.
// Called on UI thread.
virtual void OnDownloadUpdated(content::DownloadItem* download) OVERRIDE;
virtual void OnDownloadDestroyed(content::DownloadItem* download) OVERRIDE;
private:
// Called on drag-and-drop thread (Windows).
// Called on UI thread (Windows).
virtual ~DragDownloadFile();
// Called on drag-and-drop thread (Windows only).
#if defined(OS_WIN)
void StartNestedMessageLoop();
void QuitNestedMessageLoop();
#endif
// Called on either drag-and-drop thread or UI thread (Windows).
// Called on UI thread (MacOSX).
void InitiateDownload();
void DownloadCompleted(bool is_successful);
// Helper methods to make sure we're in the correct thread.
void AssertCurrentlyOnDragThread();
void AssertCurrentlyOnUIThread();
void RemoveObservers();
// Initialized on drag-and-drop thread. Accessed on either thread after that
// (Windows).
// Accessed on UI thread (MacOSX).
FilePath file_path_;
FilePath file_name_;
linked_ptr<net::FileStream> file_stream_;
GURL url_;
content::Referrer referrer_;
std::string referrer_encoding_;
content::WebContents* web_contents_;
MessageLoop* drag_message_loop_;
FilePath temp_dir_path_;
// Accessed on drag-and-drop thread (Windows).
// Accessed on UI thread (MacOSX).
bool is_started_;
bool is_successful_;
scoped_refptr<ui::DownloadFileObserver> observer_;
// Accessed on drag-and-drop thread (Windows only).
#if defined(OS_WIN)
bool is_running_nested_message_loop_;
#endif
// Access on UI thread.
content::DownloadManager* download_manager_;
bool download_manager_observer_added_;
content::DownloadItem* download_item_;
DISALLOW_COPY_AND_ASSIGN(DragDownloadFile);
};
#endif // CONTENT_BROWSER_DOWNLOAD_DRAG_DOWNLOAD_FILE_H_
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