1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
// Copyright 2012 The Chromium Authors
// 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/functional/callback.h"
#include "base/supports_user_data.h"
#include "components/download/public/common/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();
DownloadCompletionBlocker(const DownloadCompletionBlocker&) = delete;
DownloadCompletionBlocker& operator=(const DownloadCompletionBlocker&) =
delete;
~DownloadCompletionBlocker() override;
bool is_complete() const { return is_complete_; }
void set_callback(base::OnceClosure callback) {
if (!is_complete())
callback_ = std::move(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::OnceClosure callback_;
};
#endif // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_COMPLETION_BLOCKER_H_
|
