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/*
* 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 "RenderStyleConstants.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 overrideUserModifyIsEditable = false);
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;
void unite(const Region&, const RenderStyle&, bool overrideUserModifyIsEditable = false);
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); }
bool intersects(const IntRect& rect) const { return m_region.intersects(rect); }
const Region& region() const { return m_region; }
#if ENABLE(TOUCH_ACTION_REGIONS)
bool hasTouchActions() const { return !m_touchActionRegions.isEmpty(); }
WEBCORE_EXPORT OptionSet<TouchAction> touchActionsForPoint(const IntPoint&) const;
const Region* regionForTouchAction(TouchAction) const;
#endif
#if ENABLE(WHEEL_EVENT_REGIONS)
WEBCORE_EXPORT OptionSet<EventListenerRegionType> eventListenerRegionTypesForPoint(const IntPoint&) const;
const Region& eventListenerRegionForType(EventListenerRegionType) const;
#endif
#if ENABLE(EDITABLE_REGION)
void ensureEditableRegion();
bool hasEditableRegion() const { return m_editableRegion.has_value(); }
WEBCORE_EXPORT bool containsEditableElementsInRect(const IntRect&) const;
Vector<IntRect, 1> rectsForEditableElements() const { return m_editableRegion ? m_editableRegion->rects() : Vector<IntRect, 1> { }; }
#endif
template<class Encoder> void encode(Encoder&) const;
template<class Decoder> static std::optional<EventRegion> decode(Decoder&);
// FIXME: Remove legacy decode.
template<class Decoder> static WARN_UNUSED_RETURN bool decode(Decoder&, EventRegion&);
void dump(TextStream&) const;
private:
#if ENABLE(TOUCH_ACTION_REGIONS)
void uniteTouchActions(const Region&, OptionSet<TouchAction>);
#endif
void uniteEventListeners(const Region&, OptionSet<EventListenerRegionType>);
Region m_region;
#if ENABLE(TOUCH_ACTION_REGIONS)
Vector<Region> m_touchActionRegions;
#endif
#if ENABLE(WHEEL_EVENT_REGIONS)
Region m_wheelEventListenerRegion;
Region m_nonPassiveWheelEventListenerRegion;
#endif
#if ENABLE(EDITABLE_REGION)
std::optional<Region> m_editableRegion;
#endif
};
WEBCORE_EXPORT TextStream& operator<<(TextStream&, const EventRegion&);
template<class Encoder>
void EventRegion::encode(Encoder& encoder) const
{
encoder << m_region;
#if ENABLE(WHEEL_EVENT_REGIONS)
encoder << m_wheelEventListenerRegion;
encoder << m_nonPassiveWheelEventListenerRegion;
#endif
#if ENABLE(TOUCH_ACTION_REGIONS)
encoder << m_touchActionRegions;
#endif
#if ENABLE(EDITABLE_REGION)
encoder << m_editableRegion;
#endif
}
template<class Decoder>
std::optional<EventRegion> EventRegion::decode(Decoder& decoder)
{
std::optional<Region> region;
decoder >> region;
if (!region)
return std::nullopt;
EventRegion eventRegion;
eventRegion.m_region = WTFMove(*region);
#if ENABLE(WHEEL_EVENT_REGIONS)
std::optional<Region> wheelEventListenerRegion;
decoder >> wheelEventListenerRegion;
if (!wheelEventListenerRegion)
return std::nullopt;
eventRegion.m_wheelEventListenerRegion = WTFMove(*wheelEventListenerRegion);
std::optional<Region> nonPassiveWheelEventListenerRegion;
decoder >> nonPassiveWheelEventListenerRegion;
if (!nonPassiveWheelEventListenerRegion)
return std::nullopt;
eventRegion.m_nonPassiveWheelEventListenerRegion = WTFMove(*nonPassiveWheelEventListenerRegion);
#endif
#if ENABLE(TOUCH_ACTION_REGIONS)
std::optional<Vector<Region>> touchActionRegions;
decoder >> touchActionRegions;
if (!touchActionRegions)
return std::nullopt;
eventRegion.m_touchActionRegions = WTFMove(*touchActionRegions);
#endif
#if ENABLE(EDITABLE_REGION)
std::optional<std::optional<Region>> editableRegion;
decoder >> editableRegion;
if (!editableRegion)
return std::nullopt;
eventRegion.m_editableRegion = WTFMove(*editableRegion);
#endif
return eventRegion;
}
template<class Decoder>
bool EventRegion::decode(Decoder& decoder, EventRegion& eventRegion)
{
std::optional<EventRegion> decodedEventRegion;
decoder >> decodedEventRegion;
if (!decodedEventRegion)
return false;
eventRegion = WTFMove(*decodedEventRegion);
return true;
}
#if ENABLE(EDITABLE_REGION)
inline void EventRegion::ensureEditableRegion()
{
if (!m_editableRegion)
m_editableRegion.emplace();
}
#endif
}
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