| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef GridResolvedPosition_h |
| #define GridResolvedPosition_h |
| |
| #include "core/rendering/style/GridPosition.h" |
| |
| namespace WebCore { |
| |
| struct 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 adjustGridPositionForAfterEndSide(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 adjustGridPositionForAfterEndSide(resolvedPosition); |
| |
| return GridResolvedPosition(resolvedPosition); |
| } |
| |
| static GridSpan resolveGridPositionsFromAutoPlacementPosition(const RenderBox&, GridTrackSizingDirection, const GridResolvedPosition&); |
| static PassOwnPtr<GridSpan> resolveGridPositionsFromStyle(const RenderStyle&, const RenderBox&, GridTrackSizingDirection); |
| static GridResolvedPosition resolveNamedGridLinePositionFromStyle(const RenderStyle&, const GridPosition&, GridPositionSide); |
| static GridResolvedPosition resolveGridPositionFromStyle(const RenderStyle&, const GridPosition&, GridPositionSide); |
| static PassOwnPtr<GridSpan> resolveGridPositionAgainstOppositePosition(const RenderStyle&, const GridResolvedPosition& resolvedOppositePosition, const GridPosition&, GridPositionSide); |
| static PassOwnPtr<GridSpan> resolveNamedGridLinePositionAgainstOppositePosition(const RenderStyle&, const GridResolvedPosition& resolvedOppositePosition, const GridPosition&, GridPositionSide); |
| |
| 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).toInt(); |
| } |
| |
| 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); |
| } |
| |
| static size_t explicitGridColumnCount(const RenderStyle&); |
| static size_t explicitGridRowCount(const RenderStyle&); |
| |
| private: |
| |
| static size_t explicitGridSizeForSide(const RenderStyle&, GridPositionSide); |
| |
| size_t m_integerPosition; |
| }; |
| |
| } // namespace WebCore |
| |
| #endif // GridResolvedPosition_h |