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/*
* Copyright (C) 2006, 2008, 2011 Apple Inc. All rights reserved.
* Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "third_party/blink/renderer/core/layout/hit_test_location.h"
#include "third_party/blink/renderer/platform/geometry/float_rounded_rect.h"
namespace blink {
HitTestLocation::HitTestLocation()
: is_rect_based_(false), is_rectilinear_(true) {}
HitTestLocation::HitTestLocation(const IntPoint& point)
: HitTestLocation(PhysicalOffset(point)) {}
HitTestLocation::HitTestLocation(const PhysicalOffset& point)
: point_(point),
bounding_box_(RectForPoint(point)),
transformed_point_(point),
transformed_rect_(FloatRect(bounding_box_)),
is_rect_based_(false),
is_rectilinear_(true) {}
HitTestLocation::HitTestLocation(const FloatPoint& point)
: point_(PhysicalOffset::FromFloatPointFloor(point)),
bounding_box_(RectForPoint(point_)),
transformed_point_(point),
transformed_rect_(FloatRect(bounding_box_)),
is_rect_based_(false),
is_rectilinear_(true) {}
HitTestLocation::HitTestLocation(const FloatPoint& point,
const PhysicalRect& bounding_box)
: point_(PhysicalOffset::FromFloatPointFloor(point)),
bounding_box_(bounding_box),
transformed_point_(point),
transformed_rect_(FloatRect(bounding_box)),
is_rect_based_(false),
is_rectilinear_(true) {}
HitTestLocation::HitTestLocation(const DoublePoint& point)
: HitTestLocation(FloatPoint(point)) {}
HitTestLocation::HitTestLocation(const FloatPoint& point, const FloatQuad& quad)
: transformed_point_(point), transformed_rect_(quad), is_rect_based_(true) {
point_ = PhysicalOffset::FromFloatPointFloor(point);
bounding_box_ = PhysicalRect::EnclosingRect(quad.BoundingBox());
is_rectilinear_ = quad.IsRectilinear();
}
HitTestLocation::HitTestLocation(const PhysicalRect& rect)
: point_(rect.Center()),
bounding_box_(rect),
transformed_point_(point_),
is_rect_based_(true),
is_rectilinear_(true) {
transformed_rect_ = FloatQuad(FloatRect(bounding_box_));
}
HitTestLocation::HitTestLocation(const HitTestLocation& other,
const PhysicalOffset& offset)
: point_(other.point_),
bounding_box_(other.bounding_box_),
transformed_point_(other.transformed_point_),
transformed_rect_(other.transformed_rect_),
is_rect_based_(other.is_rect_based_),
is_rectilinear_(other.is_rectilinear_) {
Move(offset);
}
HitTestLocation::HitTestLocation(const HitTestLocation& other) = default;
HitTestLocation& HitTestLocation::operator=(const HitTestLocation& other) =
default;
void HitTestLocation::Move(const PhysicalOffset& offset) {
point_ += offset;
bounding_box_.Move(offset);
transformed_point_.Move(FloatSize(offset));
transformed_rect_.Move(FloatSize(offset));
}
template <typename RectType>
bool HitTestLocation::IntersectsRect(const RectType& rect,
const RectType& bounding_box) const {
// FIXME: When the hit test is not rect based we should use
// rect.contains(m_point).
// That does change some corner case tests though.
// First check if rect even intersects our bounding box.
if (!rect.Intersects(bounding_box))
return false;
// If the transformed rect is rectilinear the bounding box intersection was
// accurate.
if (is_rectilinear_)
return true;
// If rect fully contains our bounding box, we are also sure of an
// intersection.
if (rect.Contains(bounding_box))
return true;
// Otherwise we need to do a slower quad based intersection test.
return transformed_rect_.IntersectsRect(FloatRect(rect));
}
bool HitTestLocation::Intersects(const PhysicalRect& rect) const {
return IntersectsRect(rect, bounding_box_);
}
bool HitTestLocation::Intersects(const FloatRect& rect) const {
if (is_rect_based_)
return transformed_rect_.IntersectsRect(rect);
return rect.Contains(transformed_point_);
}
bool HitTestLocation::Intersects(const FloatRoundedRect& rect) const {
return rect.IntersectsQuad(transformed_rect_);
}
bool HitTestLocation::Intersects(const FloatQuad& quad) const {
// TODO(chrishtr): if the quads are not rectilinear, calling Intersects
// has false positives.
if (is_rect_based_)
return Intersects(quad.BoundingBox());
return quad.ContainsPoint(FloatPoint(point_));
}
bool HitTestLocation::ContainsPoint(const FloatPoint& point) const {
return transformed_rect_.ContainsPoint(point);
}
} // namespace blink
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