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/*
* Copyright (C) 2008, 2014 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. ``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
* 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.
*
*/
#pragma once
#include "SuspendableTimer.h"
#include "UserGestureIndicator.h"
#include <memory>
#include <wtf/MonotonicTime.h>
#include <wtf/RefCounted.h>
#include <wtf/Seconds.h>
namespace WebCore {
class DOMTimerFireState;
class Document;
class HTMLPlugInElement;
class ScheduledAction;
class DOMTimer final : public RefCounted<DOMTimer>, public SuspendableTimer {
WTF_MAKE_NONCOPYABLE(DOMTimer);
WTF_MAKE_FAST_ALLOCATED;
public:
virtual ~DOMTimer();
static Seconds defaultMinimumInterval() { return 4_ms; }
static Seconds defaultAlignmentInterval() { return 0_s; }
static Seconds defaultAlignmentIntervalInLowPowerMode() { return 30_ms; }
static Seconds nonInteractedCrossOriginFrameAlignmentInterval() { return 30_ms; }
static Seconds hiddenPageAlignmentInterval() { return 1_s; }
// Creates a new timer owned by specified ScriptExecutionContext, starts it
// and returns its Id.
static int install(ScriptExecutionContext&, std::unique_ptr<ScheduledAction>, Seconds timeout, bool singleShot);
static void removeById(ScriptExecutionContext&, int timeoutId);
// Notify that the interval may need updating (e.g. because the minimum interval
// setting for the context has changed).
void updateTimerIntervalIfNecessary();
static void scriptDidInteractWithPlugin(HTMLPlugInElement&);
private:
DOMTimer(ScriptExecutionContext&, std::unique_ptr<ScheduledAction>, Seconds interval, bool singleShot);
friend class Internals;
WEBCORE_EXPORT Seconds intervalClampedToMinimum() const;
bool isDOMTimersThrottlingEnabled(Document&) const;
void updateThrottlingStateIfNecessary(const DOMTimerFireState&);
// SuspendableTimer
void fired() override;
void didStop() override;
WEBCORE_EXPORT std::optional<MonotonicTime> alignedFireTime(MonotonicTime) const override;
// ActiveDOMObject API.
const char* activeDOMObjectName() const override;
enum TimerThrottleState {
Undetermined,
ShouldThrottle,
ShouldNotThrottle
};
int m_timeoutId;
int m_nestingLevel;
std::unique_ptr<ScheduledAction> m_action;
Seconds m_originalInterval;
TimerThrottleState m_throttleState;
Seconds m_currentTimerInterval;
Seconds m_nestedTimerInterval;
RefPtr<UserGestureToken> m_userGestureTokenToForward;
};
} // namespace WebCore
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