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// Copyright (c) 2011 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 UI_BASE_DRAGDROP_DOWNLOAD_FILE_INTERFACE_H_
#define UI_BASE_DRAGDROP_DOWNLOAD_FILE_INTERFACE_H_
#include "build/build_config.h"
#include "base/component_export.h"
#include "base/memory/ref_counted.h"
#if defined(OS_WIN)
#include <objidl.h>
#endif
namespace base {
class FilePath;
}
namespace ui {
// Defines the interface to observe the status of file download.
class COMPONENT_EXPORT(UI_BASE_DATA_EXCHANGE) DownloadFileObserver
: public base::RefCountedThreadSafe<DownloadFileObserver> {
public:
virtual void OnDownloadCompleted(const base::FilePath& file_path) = 0;
virtual void OnDownloadAborted() = 0;
protected:
friend class base::RefCountedThreadSafe<DownloadFileObserver>;
virtual ~DownloadFileObserver() = default;
};
// Defines the interface to control how a file is downloaded.
class COMPONENT_EXPORT(UI_BASE_DATA_EXCHANGE) DownloadFileProvider {
public:
virtual ~DownloadFileProvider() = default;
// Starts the download asynchronously and returns immediately.
virtual void Start(DownloadFileObserver* observer) = 0;
// Returns true if the download succeeded and false otherwise. Waits until the
// download is completed/cancelled/interrupted before returning.
virtual bool Wait() = 0;
// Cancels the download.
virtual void Stop() = 0;
};
} // namespace ui
#endif // UI_BASE_DRAGDROP_DOWNLOAD_FILE_INTERFACE_H_