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/*
* Copyright (C) 2014 Igalia S.L.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* OWNER 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 GridResolvedPosition_h
#define GridResolvedPosition_h
#if ENABLE(CSS_GRID_LAYOUT)
#include "GridPosition.h"
namespace WebCore {
class GridSpan;
class RenderBox;
class RenderStyle;
enum GridPositionSide {
ColumnStartSide,
ColumnEndSide,
RowStartSide,
RowEndSide
};
enum GridTrackSizingDirection {
ForColumns,
ForRows
};
// This class represents an index into one of the dimensions of the grid array.
// Wraps a size_t integer just for the purpose of knowing what we manipulate in the grid code.
class GridResolvedPosition {
public:
static GridResolvedPosition adjustGridPositionForRowEndColumnEndSide(size_t resolvedPosition)
{
return resolvedPosition ? GridResolvedPosition(resolvedPosition - 1) : GridResolvedPosition(0);
}
static GridResolvedPosition adjustGridPositionForSide(size_t resolvedPosition, GridPositionSide side)
{
// An item finishing on the N-th line belongs to the N-1-th cell.
if (side == ColumnEndSide || side == RowEndSide)
return adjustGridPositionForRowEndColumnEndSide(resolvedPosition);
return GridResolvedPosition(resolvedPosition);
}
static GridSpan resolveGridPositionsFromAutoPlacementPosition(const RenderStyle&, const RenderBox&, GridTrackSizingDirection, const GridResolvedPosition&);
static void adjustNamedGridItemPosition(const RenderStyle&, GridPosition&, GridPositionSide);
static void adjustGridPositionsFromStyle(const RenderStyle&, GridPosition& initialPosition, GridPosition& finalPosition, GridPositionSide initialPositionSide, GridPositionSide finalPositionSide);
static std::unique_ptr<GridSpan> resolveGridPositionsFromStyle(const RenderStyle&, const RenderBox&, GridTrackSizingDirection);
static GridResolvedPosition resolveNamedGridLinePositionFromStyle(const RenderStyle&, const GridPosition&, GridPositionSide);
static GridResolvedPosition resolveGridPositionFromStyle(const RenderStyle&, const GridPosition&, GridPositionSide);
static std::unique_ptr<GridSpan> resolveGridPositionAgainstOppositePosition(const RenderStyle&, const GridResolvedPosition&, const GridPosition&, GridPositionSide);
static std::unique_ptr<GridSpan> resolveNamedGridLinePositionAgainstOppositePosition(const RenderStyle&, const GridResolvedPosition&, const GridPosition&, GridPositionSide);
static std::unique_ptr<GridSpan> resolveRowStartColumnStartNamedGridLinePositionAgainstOppositePosition(const GridResolvedPosition&, const GridPosition&, const Vector<size_t>&);
static std::unique_ptr<GridSpan> resolveRowEndColumnEndNamedGridLinePositionAgainstOppositePosition(const GridResolvedPosition&, const GridPosition&, const Vector<size_t>&);
GridResolvedPosition(size_t position)
: m_integerPosition(position)
{
}
GridResolvedPosition(const GridPosition& position, GridPositionSide side)
{
ASSERT(position.integerPosition());
size_t integerPosition = position.integerPosition() - 1;
m_integerPosition = adjustGridPositionForSide(integerPosition, side).m_integerPosition;
}
GridResolvedPosition& operator*()
{
return *this;
}
GridResolvedPosition& operator++()
{
m_integerPosition++;
return *this;
}
bool operator==(const GridResolvedPosition& other) const
{
return m_integerPosition == other.m_integerPosition;
}
bool operator!=(const GridResolvedPosition& other) const
{
return m_integerPosition != other.m_integerPosition;
}
bool operator<(const GridResolvedPosition& other) const
{
return m_integerPosition < other.m_integerPosition;
}
bool operator>(const GridResolvedPosition& other) const
{
return m_integerPosition > other.m_integerPosition;
}
bool operator<=(const GridResolvedPosition& other) const
{
return m_integerPosition <= other.m_integerPosition;
}
bool operator>=(const GridResolvedPosition& other) const
{
return m_integerPosition >= other.m_integerPosition;
}
size_t toInt() const
{
return m_integerPosition;
}
GridResolvedPosition next() const
{
return GridResolvedPosition(m_integerPosition + 1);
}
private:
size_t m_integerPosition;
};
} // namespace WebCore
#endif // ENABLE(CSS_GRID_LAYOUT)
#endif // GridResolvedPosition_h
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