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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 CHROME_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_HANDLE_H_
#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_HANDLE_H_
#pragma once
#include <string>
class DownloadManager;
class ResourceDispatcherHost;
class TabContents;
// A handle used by the download system for operations on the URLRequest
// or objects conditional on it (e.g. TabContents).
// This class needs to be copyable, so we can pass it across threads and not
// worry about lifetime or const-ness.
class DownloadRequestHandle {
public:
// Create a null DownloadRequestHandle: getters will return null, and
// all actions are no-ops.
// TODO(rdsmith): Ideally, actions would be forbidden rather than
// no-ops, to confirm that no non-testing code actually uses
// a null DownloadRequestHandle. But for now, we need the no-op
// behavior for unit tests. Long-term, this should be fixed by
// allowing mocking of ResourceDispatcherHost in unit tests.
DownloadRequestHandle();
// Note that |rdh| is required to be non-null.
DownloadRequestHandle(ResourceDispatcherHost* rdh,
int child_id,
int render_view_id,
int request_id);
// These functions must be called on the UI thread.
TabContents* GetTabContents() const;
DownloadManager* GetDownloadManager() const;
// Pause or resume the matching URL request.
void PauseRequest();
void ResumeRequest();
// Cancel the request
void CancelRequest();
std::string DebugString() const;
private:
// The resource dispatcher host.
ResourceDispatcherHost* rdh_;
// The ID of the child process that started the download.
int child_id_;
// The ID of the render view that started the download.
int render_view_id_;
// The ID associated with the request used for the download.
int request_id_;
};
#endif // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_HANDLE_H_
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