cef/libcef/drag_download_file.h

97 lines
3.0 KiB
C++

// Copyright (c) 2011 The Chromium Embedded Framework Authors.
// Portions copyright (c) 2009-2010 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 _DRAG_DOWNLOAD_FILE_H
#define _DRAG_DOWNLOAD_FILE_H
#pragma once
#include "base/file_path.h"
#include "base/memory/linked_ptr.h"
#include "base/message_loop.h"
#include "googleurl/src/gurl.h"
#include "ui/base/dragdrop/download_file_interface.h"
class BrowserWebViewDelegate;
namespace net {
class FileStream;
}
class DragDownloadFile : public ui::DownloadFileProvider {
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 GURL& referrer,
const std::string& referrer_encoding,
BrowserWebViewDelegate* view);
// DownloadFileProvider methods.
// Called on drag-and-drop thread (Windows).
// Called on UI thread (MacOSX).
virtual bool Start(ui::DownloadFileObserver* observer);
virtual void Stop();
#if defined(OS_WIN)
virtual IStream* GetStream() { return NULL; }
#endif
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();
// 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_;
GURL referrer_;
std::string referrer_encoding_;
BrowserWebViewDelegate* view_;
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
DISALLOW_COPY_AND_ASSIGN(DragDownloadFile);
};
#endif // _DRAG_DOWNLOAD_FILE_H