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// Copyright 2015 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 "modules/wake_lock/ScreenWakeLock.h"
#include "core/dom/Document.h"
#include "core/frame/LocalFrame.h"
#include "core/frame/Screen.h"
#include "core/page/PageVisibilityState.h"
#include "platform/RuntimeEnabledFeatures.h"
#include "public/platform/InterfaceProvider.h"
namespace blink {
// static
bool ScreenWakeLock::keepAwake(Screen& screen) {
ScreenWakeLock* screenWakeLock = fromScreen(screen);
if (!screenWakeLock)
return false;
return screenWakeLock->keepAwake();
}
// static
void ScreenWakeLock::setKeepAwake(Screen& screen, bool keepAwake) {
ScreenWakeLock* screenWakeLock = fromScreen(screen);
if (screenWakeLock)
screenWakeLock->setKeepAwake(keepAwake);
}
// static
const char* ScreenWakeLock::supplementName() {
return "ScreenWakeLock";
}
// static
ScreenWakeLock* ScreenWakeLock::from(LocalFrame* frame) {
if (!RuntimeEnabledFeatures::wakeLockEnabled())
return nullptr;
ScreenWakeLock* supplement = static_cast<ScreenWakeLock*>(
Supplement<LocalFrame>::from(frame, supplementName()));
if (!supplement) {
supplement = new ScreenWakeLock(*frame);
Supplement<LocalFrame>::provideTo(*frame, supplementName(), supplement);
}
return supplement;
}
void ScreenWakeLock::pageVisibilityChanged() {
notifyService();
}
void ScreenWakeLock::contextDestroyed(ExecutionContext*) {
setKeepAwake(false);
}
DEFINE_TRACE(ScreenWakeLock) {
Supplement<LocalFrame>::trace(visitor);
PageVisibilityObserver::trace(visitor);
ContextLifecycleObserver::trace(visitor);
}
ScreenWakeLock::ScreenWakeLock(LocalFrame& frame)
: Supplement<LocalFrame>(frame),
ContextLifecycleObserver(frame.document()),
PageVisibilityObserver(frame.page()),
m_keepAwake(false) {
DCHECK(!m_service.is_bound());
DCHECK(frame.interfaceProvider());
frame.interfaceProvider()->getInterface(mojo::MakeRequest(&m_service));
}
bool ScreenWakeLock::keepAwake() const {
return m_keepAwake;
}
void ScreenWakeLock::setKeepAwake(bool keepAwake) {
m_keepAwake = keepAwake;
notifyService();
}
// static
ScreenWakeLock* ScreenWakeLock::fromScreen(Screen& screen) {
return screen.frame() ? ScreenWakeLock::from(screen.frame()) : nullptr;
}
void ScreenWakeLock::notifyService() {
if (!m_service)
return;
if (m_keepAwake && page() && page()->isPageVisible())
m_service->RequestWakeLock();
else
m_service->CancelWakeLock();
}
} // namespace blink
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