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/*
* Copyright (C) 2011 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 COMPUTER, INC. ``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 COMPUTER, INC. OR
* 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.
*/
#ifndef HitTestingTransformState_h
#define HitTestingTransformState_h
#include "platform/geometry/FloatPoint.h"
#include "platform/geometry/FloatQuad.h"
#include "platform/geometry/IntSize.h"
#include "platform/transforms/AffineTransform.h"
#include "platform/transforms/TransformationMatrix.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RefCounted.h"
namespace blink {
// FIXME: Now that TransformState lazily creates its TransformationMatrix it takes up less space.
// So there's really no need for a ref counted version. So This class should be removed and replaced
// with TransformState. There are some minor differences (like the way translate() works slightly
// differently than move()) so care has to be taken when this is done.
class HitTestingTransformState : public RefCounted<HitTestingTransformState> {
public:
static PassRefPtr<HitTestingTransformState> create(const FloatPoint& p, const FloatQuad& quad, const FloatQuad& area)
{
return adoptRef(new HitTestingTransformState(p, quad, area));
}
static PassRefPtr<HitTestingTransformState> create(const HitTestingTransformState& other)
{
return adoptRef(new HitTestingTransformState(other));
}
enum TransformAccumulation { FlattenTransform, AccumulateTransform };
void translate(int x, int y, TransformAccumulation);
void applyTransform(const TransformationMatrix& transformFromContainer, TransformAccumulation);
FloatPoint mappedPoint() const;
FloatQuad mappedQuad() const;
FloatQuad mappedArea() const;
LayoutRect boundsOfMappedArea() const;
void flatten();
FloatPoint m_lastPlanarPoint;
FloatQuad m_lastPlanarQuad;
FloatQuad m_lastPlanarArea;
TransformationMatrix m_accumulatedTransform;
bool m_accumulatingTransform;
private:
HitTestingTransformState(const FloatPoint& p, const FloatQuad& quad, const FloatQuad& area)
: m_lastPlanarPoint(p)
, m_lastPlanarQuad(quad)
, m_lastPlanarArea(area)
, m_accumulatingTransform(false)
{
}
HitTestingTransformState(const HitTestingTransformState& other)
: RefCounted<HitTestingTransformState>()
, m_lastPlanarPoint(other.m_lastPlanarPoint)
, m_lastPlanarQuad(other.m_lastPlanarQuad)
, m_lastPlanarArea(other.m_lastPlanarArea)
, m_accumulatedTransform(other.m_accumulatedTransform)
, m_accumulatingTransform(other.m_accumulatingTransform)
{
}
void flattenWithTransform(const TransformationMatrix&);
};
} // namespace blink
#endif // HitTestingTransformState_h
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