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/*
* Copyright (C) 2022 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "WakeLockManager.h"
#include "Document.h"
#include "SleepDisabler.h"
#include "VisibilityState.h"
#include "WakeLockSentinel.h"
namespace WebCore {
WakeLockManager::WakeLockManager(Document& document)
: m_document(document)
{
m_document.registerForVisibilityStateChangedCallbacks(*this);
}
WakeLockManager::~WakeLockManager()
{
m_document.unregisterForVisibilityStateChangedCallbacks(*this);
}
void WakeLockManager::addWakeLock(Ref<WakeLockSentinel>&& lock, std::optional<PageIdentifier> pageID)
{
auto type = lock->type();
auto& locks = m_wakeLocks.ensure(type, [] { return Vector<RefPtr<WakeLockSentinel>>(); }).iterator->value;
ASSERT(!locks.contains(lock.ptr()));
locks.append(WTFMove(lock));
if (locks.size() != 1)
return;
switch (type) {
case WakeLockType::Screen:
m_screenLockDisabler = makeUnique<SleepDisabler>("Screen Wake Lock"_s, PAL::SleepDisabler::Type::Display, pageID);
break;
}
}
void WakeLockManager::removeWakeLock(WakeLockSentinel& lock)
{
auto it = m_wakeLocks.find(lock.type());
if (it == m_wakeLocks.end())
return;
auto& locks = it->value;
locks.removeFirst(&lock);
ASSERT(!locks.contains(&lock));
if (!locks.isEmpty())
return;
m_wakeLocks.remove(it);
switch (lock.type()) {
case WakeLockType::Screen:
m_screenLockDisabler = nullptr;
break;
}
}
// https://www.w3.org/TR/screen-wake-lock/#handling-document-loss-of-visibility
void WakeLockManager::visibilityStateChanged()
{
if (m_document.visibilityState() != VisibilityState::Hidden)
return;
releaseAllLocks(WakeLockType::Screen);
}
void WakeLockManager::releaseAllLocks(WakeLockType type)
{
auto it = m_wakeLocks.find(type);
if (it == m_wakeLocks.end())
return;
auto& locks = it->value;
while (!locks.isEmpty()) {
RefPtr lock = *locks.begin();
lock->release(*this);
}
}
} // namespace WebCore
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