blob: 23580497aeb4ec1c2883a9f3a761bafae427ce0d (
plain)
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
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
// 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.
#include "content/browser/power_save_blocker_impl.h"
#include "base/logging.h"
#include "content/browser/android/content_video_view.h"
#include "content/public/browser/browser_thread.h"
namespace content {
class PowerSaveBlockerImpl::Delegate
: public base::RefCountedThreadSafe<PowerSaveBlockerImpl::Delegate> {
public:
explicit Delegate(PowerSaveBlockerType type) : type_(type) {}
// Does the actual work to apply or remove the desired power save block.
void ApplyBlock();
void RemoveBlock();
private:
friend class base::RefCountedThreadSafe<Delegate>;
~Delegate() {}
// The counter of requests from clients for type
// kPowerSaveBlockPreventDisplaySleep.
static int blocker_count_;
const PowerSaveBlockerType type_;
DISALLOW_COPY_AND_ASSIGN(Delegate);
};
int PowerSaveBlockerImpl::Delegate::blocker_count_ = 0;
void PowerSaveBlockerImpl::Delegate::ApplyBlock() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
if (type_ != kPowerSaveBlockPreventDisplaySleep)
return;
if (blocker_count_ == 0)
ContentVideoView::KeepScreenOn(true);
++blocker_count_;
}
void PowerSaveBlockerImpl::Delegate::RemoveBlock() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
if (type_ != kPowerSaveBlockPreventDisplaySleep)
return;
--blocker_count_;
if (blocker_count_ == 0)
ContentVideoView::KeepScreenOn(false);
}
PowerSaveBlockerImpl::PowerSaveBlockerImpl(PowerSaveBlockerType type,
const std::string& reason)
: delegate_(new Delegate(type)) {
// This may be called on any thread.
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(&Delegate::ApplyBlock, delegate_));
}
PowerSaveBlockerImpl::~PowerSaveBlockerImpl() {
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(&Delegate::RemoveBlock, delegate_));
}
} // namespace content
|
