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/*
* Copyright (C) 2010 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.
*/
#pragma once
#include <wtf/Function.h>
#include <wtf/Noncopyable.h>
#include <wtf/Optional.h>
#include <wtf/RefCounted.h>
#include <wtf/RefPtr.h>
#include <wtf/Vector.h>
namespace WebCore {
class Document;
enum ProcessingUserGestureState {
ProcessingUserGesture,
ProcessingPotentialUserGesture,
NotProcessingUserGesture
};
class UserGestureToken : public RefCounted<UserGestureToken> {
public:
static RefPtr<UserGestureToken> create(ProcessingUserGestureState state)
{
return adoptRef(new UserGestureToken(state));
}
WEBCORE_EXPORT ~UserGestureToken();
ProcessingUserGestureState state() const { return m_state; }
bool processingUserGesture() const { return m_state == ProcessingUserGesture; }
bool processingUserGestureForMedia() const { return m_state == ProcessingUserGesture || m_state == ProcessingPotentialUserGesture; }
void addDestructionObserver(WTF::Function<void (UserGestureToken&)>&& observer)
{
m_destructionObservers.append(WTFMove(observer));
}
private:
UserGestureToken(ProcessingUserGestureState state)
: m_state(state)
{
}
ProcessingUserGestureState m_state = NotProcessingUserGesture;
Vector<WTF::Function<void (UserGestureToken&)>> m_destructionObservers;
};
class UserGestureIndicator {
WTF_MAKE_NONCOPYABLE(UserGestureIndicator);
public:
WEBCORE_EXPORT static RefPtr<UserGestureToken> currentUserGesture();
WEBCORE_EXPORT static bool processingUserGesture();
WEBCORE_EXPORT static bool processingUserGestureForMedia();
// If a document is provided, its last known user gesture timestamp is updated.
WEBCORE_EXPORT explicit UserGestureIndicator(std::optional<ProcessingUserGestureState>, Document* = nullptr);
WEBCORE_EXPORT explicit UserGestureIndicator(RefPtr<UserGestureToken>);
WEBCORE_EXPORT ~UserGestureIndicator();
private:
RefPtr<UserGestureToken> m_previousToken;
};
}
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