blob: 58c496b69219a18b9c41708dd4804beb4b004b88 [file] [log] [blame]
/*
* Copyright (C) 2019 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 "AffineTransform.h"
#include "Region.h"
#include "TouchAction.h"
#include <wtf/OptionSet.h>
#include <wtf/Vector.h>
namespace WebCore {
class EventRegion;
class RenderStyle;
class EventRegionContext {
public:
explicit EventRegionContext(EventRegion&);
void pushTransform(const AffineTransform&);
void popTransform();
void pushClip(const IntRect&);
void popClip();
void unite(const Region&, const RenderStyle&);
bool contains(const IntRect&) const;
private:
EventRegion& m_eventRegion;
Vector<AffineTransform> m_transformStack;
Vector<IntRect> m_clipStack;
};
class EventRegion {
public:
WEBCORE_EXPORT EventRegion();
EventRegionContext makeContext() { return EventRegionContext(*this); }
bool isEmpty() const { return m_region.isEmpty(); }
WEBCORE_EXPORT bool operator==(const EventRegion&) const;
WEBCORE_EXPORT void unite(const Region&, const RenderStyle&);
WEBCORE_EXPORT void translate(const IntSize&);
bool contains(const IntPoint& point) const { return m_region.contains(point); }
bool contains(const IntRect& rect) const { return m_region.contains(rect); }
const Region& region() const { return m_region; }
bool hasTouchActions() const { return !m_touchActionRegions.isEmpty(); }
WEBCORE_EXPORT OptionSet<TouchAction> touchActionsForPoint(const IntPoint&) const;
const Region* regionForTouchAction(TouchAction) const;
template<class Encoder> void encode(Encoder&) const;
template<class Decoder> static Optional<EventRegion> decode(Decoder&);
// FIXME: Remove legacy decode.
template<class Decoder> static bool decode(Decoder&, EventRegion&);
void dump(TextStream&) const;
private:
void uniteTouchActions(const Region&, OptionSet<TouchAction>);
Region m_region;
Vector<Region> m_touchActionRegions;
};
WEBCORE_EXPORT TextStream& operator<<(TextStream&, const EventRegion&);
template<class Encoder>
void EventRegion::encode(Encoder& encoder) const
{
encoder << m_region;
encoder << m_touchActionRegions;
}
template<class Decoder>
Optional<EventRegion> EventRegion::decode(Decoder& decoder)
{
Optional<Region> region;
decoder >> region;
if (!region)
return WTF::nullopt;
EventRegion eventRegion;
eventRegion.m_region = WTFMove(*region);
Optional<Vector<Region>> touchActionRegions;
decoder >> touchActionRegions;
if (!touchActionRegions)
return WTF::nullopt;
eventRegion.m_touchActionRegions = WTFMove(*touchActionRegions);
return eventRegion;
}
template<class Decoder>
bool EventRegion::decode(Decoder& decoder, EventRegion& eventRegion)
{
Optional<EventRegion> decodedEventRegion;
decoder >> decodedEventRegion;
if (!decodedEventRegion)
return false;
eventRegion = WTFMove(*decodedEventRegion);
return true;
}
}