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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_DOWNLOAD_REQUEST_HANDLE_H_
#define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_HANDLE_H_
#include <string>
#include "base/compiler_specific.h"
#include "base/memory/weak_ptr.h"
#include "content/browser/download/download_resource_handler.h"
#include "content/common/content_export.h"
namespace content {
class DownloadManager;
class WebContents;
// A handle used by the download system for operations on the URLRequest
// or objects conditional on it (e.g. WebContentsImpl).
// This class needs to be copyable, so we can pass it across threads and not
// worry about lifetime or const-ness.
//
// DownloadRequestHandleInterface is defined for mocking purposes.
class CONTENT_EXPORT DownloadRequestHandleInterface {
public:
virtual ~DownloadRequestHandleInterface() {}
// These functions must be called on the UI thread.
virtual WebContents* GetWebContents() const = 0;
virtual DownloadManager* GetDownloadManager() const = 0;
// Pauses or resumes the matching URL request.
virtual void PauseRequest() const = 0;
virtual void ResumeRequest() const = 0;
// Cancels the request.
virtual void CancelRequest() const = 0;
// Describes the object.
virtual std::string DebugString() const = 0;
};
class CONTENT_EXPORT DownloadRequestHandle
: public DownloadRequestHandleInterface {
public:
virtual ~DownloadRequestHandle();
// 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(const base::WeakPtr<DownloadResourceHandler>& handler,
int child_id,
int render_view_id,
int request_id);
// Implement DownloadRequestHandleInterface interface.
virtual WebContents* GetWebContents() const OVERRIDE;
virtual DownloadManager* GetDownloadManager() const OVERRIDE;
virtual void PauseRequest() const OVERRIDE;
virtual void ResumeRequest() const OVERRIDE;
virtual void CancelRequest() const OVERRIDE;
virtual std::string DebugString() const OVERRIDE;
private:
base::WeakPtr<DownloadResourceHandler> handler_;
// 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_;
};
} // namespace content
#endif // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_HANDLE_H_
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