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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.
*/
#include "config.h"
#include "UserGestureIndicator.h"
#include "Document.h"
#include <wtf/MainThread.h>
namespace WebCore {
static bool isDefinite(ProcessingUserGestureState state)
{
return state == DefinitelyProcessingUserGesture || state == DefinitelyNotProcessingUserGesture || state == DefinitelyProcessingPotentialUserGesture;
}
ProcessingUserGestureState UserGestureIndicator::s_state = DefinitelyNotProcessingUserGesture;
UserGestureIndicator::UserGestureIndicator(ProcessingUserGestureState state, Document* document)
: m_previousState(s_state)
{
// Silently ignore UserGestureIndicators on non main threads.
if (!isMainThread())
return;
// We overwrite s_state only if the caller is definite about the gesture state.
if (isDefinite(state))
s_state = state;
ASSERT(isDefinite(s_state));
if (document && s_state == DefinitelyProcessingUserGesture)
document->topDocument().updateLastHandledUserGestureTimestamp();
}
UserGestureIndicator::~UserGestureIndicator()
{
if (!isMainThread())
return;
s_state = m_previousState;
ASSERT(isDefinite(s_state));
}
bool UserGestureIndicator::processingUserGesture()
{
return isMainThread() ? s_state == DefinitelyProcessingUserGesture : false;
}
bool UserGestureIndicator::processingUserGestureForMedia()
{
if (!isMainThread())
return false;
return s_state == DefinitelyProcessingUserGesture || s_state == DefinitelyProcessingPotentialUserGesture;
}
}
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