blob: a4848deccd3e1d076277b0819ba6a39cfbc4358d [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.
*/
#include "config.h"
#include "EventRegion.h"
#include "RenderStyle.h"
namespace WebCore {
EventRegionContext::EventRegionContext(EventRegion& eventRegion)
: m_eventRegion(eventRegion)
{
}
void EventRegionContext::pushTransform(const AffineTransform& transform)
{
if (m_transformStack.isEmpty())
m_transformStack.append(transform);
else
m_transformStack.append(m_transformStack.last() * transform);
}
void EventRegionContext::popTransform()
{
if (m_transformStack.isEmpty()) {
ASSERT_NOT_REACHED();
return;
}
m_transformStack.removeLast();
}
void EventRegionContext::pushClip(const IntRect& clipRect)
{
auto transformedClip = m_transformStack.isEmpty() ? clipRect : m_transformStack.last().mapRect(clipRect);
if (m_clipStack.isEmpty())
m_clipStack.append(transformedClip);
else
m_clipStack.append(intersection(m_clipStack.last(), transformedClip));
}
void EventRegionContext::popClip()
{
if (m_clipStack.isEmpty()) {
ASSERT_NOT_REACHED();
return;
}
m_clipStack.removeLast();
}
void EventRegionContext::unite(const Region& region, const RenderStyle& style)
{
if (m_transformStack.isEmpty() && m_clipStack.isEmpty()) {
m_eventRegion.unite(region, style);
return;
}
auto transformedAndClippedRegion = m_transformStack.isEmpty() ? region : m_transformStack.last().mapRegion(region);
if (!m_clipStack.isEmpty())
transformedAndClippedRegion.intersect(m_clipStack.last());
m_eventRegion.unite(transformedAndClippedRegion, style);
}
bool EventRegionContext::contains(const IntRect& rect) const
{
if (m_transformStack.isEmpty())
return m_eventRegion.contains(rect);
return m_eventRegion.contains(m_transformStack.last().mapRect(rect));
}
EventRegion::EventRegion() = default;
bool EventRegion::operator==(const EventRegion& other) const
{
if (m_touchActionRegions != other.m_touchActionRegions)
return false;
return m_region == other.m_region;
}
void EventRegion::unite(const Region& region, const RenderStyle& style)
{
m_region.unite(region);
uniteTouchActions(region, style.effectiveTouchActions());
}
void EventRegion::translate(const IntSize& offset)
{
m_region.translate(offset);
for (auto& touchActionRegion : m_touchActionRegions)
touchActionRegion.translate(offset);
}
static inline unsigned toIndex(TouchAction touchAction)
{
switch (touchAction) {
case TouchAction::None:
return 0;
case TouchAction::Manipulation:
return 1;
case TouchAction::PanX:
return 2;
case TouchAction::PanY:
return 3;
case TouchAction::PinchZoom:
return 4;
case TouchAction::Auto:
break;
}
ASSERT_NOT_REACHED();
return 0;
}
static inline TouchAction toTouchAction(unsigned index)
{
switch (index) {
case 0:
return TouchAction::None;
case 1:
return TouchAction::Manipulation;
case 2:
return TouchAction::PanX;
case 3:
return TouchAction::PanY;
case 4:
return TouchAction::PinchZoom;
default:
break;
}
ASSERT_NOT_REACHED();
return TouchAction::Auto;
}
void EventRegion::uniteTouchActions(const Region& touchRegion, OptionSet<TouchAction> touchActions)
{
for (auto touchAction : touchActions) {
if (touchAction == TouchAction::Auto)
break;
auto index = toIndex(touchAction);
if (m_touchActionRegions.size() < index + 1)
m_touchActionRegions.grow(index + 1);
}
for (unsigned i = 0; i < m_touchActionRegions.size(); ++i) {
auto regionTouchAction = toTouchAction(i);
if (touchActions.contains(regionTouchAction))
m_touchActionRegions[i].unite(touchRegion);
else
m_touchActionRegions[i].subtract(touchRegion);
}
}
const Region* EventRegion::regionForTouchAction(TouchAction action) const
{
unsigned actionIndex = toIndex(action);
if (actionIndex >= m_touchActionRegions.size())
return nullptr;
return &m_touchActionRegions[actionIndex];
}
OptionSet<TouchAction> EventRegion::touchActionsForPoint(const IntPoint& point) const
{
OptionSet<TouchAction> actions;
for (unsigned i = 0; i < m_touchActionRegions.size(); ++i) {
if (m_touchActionRegions[i].contains(point)) {
auto action = toTouchAction(i);
actions.add(action);
if (action == TouchAction::None || action == TouchAction::Manipulation)
break;
}
}
if (actions.isEmpty())
return { TouchAction::Auto };
return actions;
}
void EventRegion::dump(TextStream& ts) const
{
ts << m_region;
if (!m_touchActionRegions.isEmpty()) {
TextStream::IndentScope indentScope(ts);
ts << indent << "(touch-action\n";
for (unsigned i = 0; i < m_touchActionRegions.size(); ++i) {
if (m_touchActionRegions[i].isEmpty())
continue;
TextStream::IndentScope indentScope(ts);
ts << indent << "(" << toTouchAction(i);
ts << indent << m_touchActionRegions[i];
ts << indent << ")\n";
}
ts << indent << ")\n";
}
}
TextStream& operator<<(TextStream& ts, TouchAction touchAction)
{
switch (touchAction) {
case TouchAction::None:
return ts << "none";
case TouchAction::Manipulation:
return ts << "manipulation";
case TouchAction::PanX:
return ts << "pan-x";
case TouchAction::PanY:
return ts << "pan-y";
case TouchAction::PinchZoom:
return ts << "pinch-zoom";
case TouchAction::Auto:
return ts << "auto";
}
ASSERT_NOT_REACHED();
return ts;
}
TextStream& operator<<(TextStream& ts, const EventRegion& eventRegion)
{
eventRegion.dump(ts);
return ts;
}
}