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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 CHROME_BROWSER_DOWNLOAD_DOWNLOAD_COMPLETION_BLOCKER_H_
#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_COMPLETION_BLOCKER_H_
#include "base/callback.h"
#include "base/supports_user_data.h"
#include "content/public/browser/download_item.h"
// A subsystem may use a DownloadCompletionBlocker in conjunction with
// DownloadManagerDelegate::ShouldCompleteDownload() in order to block the
// completion of a DownloadItem. CompleteDownload() will run the most recent
// callback set.
class DownloadCompletionBlocker : public base::SupportsUserData::Data {
public:
DownloadCompletionBlocker();
virtual ~DownloadCompletionBlocker();
bool is_complete() const { return is_complete_; }
void set_callback(const base::Closure& callback) {
if (!is_complete())
callback_ = callback;
}
// Mark this download item as complete with respect to this blocker. (Other
// blockers may continue to block the item.) Run |callback_|. This method may
// only be called once, so |callback_| will only be called once. Subclasses
// must call the base implementation if they override this method.
virtual void CompleteDownload();
private:
bool is_complete_;
base::Closure callback_;
DISALLOW_COPY_AND_ASSIGN(DownloadCompletionBlocker);
};
#endif // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_COMPLETION_BLOCKER_H_
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