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| 1 /* | |
| 2 * Copyright (C) 2011 Apple Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * 1. Redistributions of source code must retain the above copyright | |
| 8 * notice, this list of conditions and the following disclaimer. | |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer in the | |
| 11 * documentation and/or other materials provided with the distribution. | |
| 12 * | |
| 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY | |
| 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | |
| 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 */ | |
| 25 | |
| 26 #ifndef RenderGrid_h | |
| 27 #define RenderGrid_h | |
| 28 | |
| 29 #include "core/rendering/OrderIterator.h" | |
| 30 #include "core/rendering/RenderBlock.h" | |
| 31 #include "core/rendering/style/GridResolvedPosition.h" | |
| 32 | |
| 33 namespace blink { | |
| 34 | |
| 35 struct GridCoordinate; | |
| 36 struct GridSpan; | |
| 37 class GridTrack; | |
| 38 | |
| 39 class RenderGrid final : public RenderBlock { | |
| 40 public: | |
| 41 RenderGrid(Element*); | |
| 42 virtual ~RenderGrid(); | |
| 43 | |
| 44 virtual const char* renderName() const override; | |
| 45 | |
| 46 virtual void layoutBlock(bool relayoutChildren) override; | |
| 47 | |
| 48 virtual bool canCollapseAnonymousBlockChild() const override { return false;
} | |
| 49 | |
| 50 void dirtyGrid(); | |
| 51 | |
| 52 const Vector<LayoutUnit>& columnPositions() const { return m_columnPositions
; } | |
| 53 const Vector<LayoutUnit>& rowPositions() const { return m_rowPositions; } | |
| 54 | |
| 55 private: | |
| 56 virtual bool isRenderGrid() const override { return true; } | |
| 57 virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, Layo
utUnit& maxLogicalWidth) const override; | |
| 58 virtual void computePreferredLogicalWidths() override; | |
| 59 | |
| 60 virtual void addChild(RenderObject* newChild, RenderObject* beforeChild = 0)
override; | |
| 61 void addChildToIndexesMap(RenderBox*); | |
| 62 virtual void removeChild(RenderObject*) override; | |
| 63 | |
| 64 virtual void styleDidChange(StyleDifference, const RenderStyle*) override; | |
| 65 | |
| 66 bool explicitGridDidResize(const RenderStyle*) const; | |
| 67 bool namedGridLinesDefinitionDidChange(const RenderStyle*) const; | |
| 68 | |
| 69 class GridIterator; | |
| 70 struct GridSizingData; | |
| 71 bool gridElementIsShrinkToFit(); | |
| 72 void computeUsedBreadthOfGridTracks(GridTrackSizingDirection, GridSizingData
&); | |
| 73 void computeUsedBreadthOfGridTracks(GridTrackSizingDirection, GridSizingData
&, LayoutUnit& availableLogicalSpace); | |
| 74 LayoutUnit computeUsedBreadthOfMinLength(GridTrackSizingDirection, const Gri
dLength&) const; | |
| 75 LayoutUnit computeUsedBreadthOfMaxLength(GridTrackSizingDirection, const Gri
dLength&, LayoutUnit usedBreadth) const; | |
| 76 LayoutUnit computeUsedBreadthOfSpecifiedLength(GridTrackSizingDirection, con
st Length&) const; | |
| 77 void resolveContentBasedTrackSizingFunctions(GridTrackSizingDirection, GridS
izingData&, LayoutUnit& availableLogicalSpace); | |
| 78 | |
| 79 void ensureGridSize(size_t maximumRowIndex, size_t maximumColumnIndex); | |
| 80 void insertItemIntoGrid(RenderBox*, const GridCoordinate&); | |
| 81 void placeItemsOnGrid(); | |
| 82 void populateExplicitGridAndOrderIterator(); | |
| 83 PassOwnPtr<GridCoordinate> createEmptyGridAreaAtSpecifiedPositionsOutsideGri
d(const RenderBox*, GridTrackSizingDirection, const GridSpan& specifiedPositions
) const; | |
| 84 void placeSpecifiedMajorAxisItemsOnGrid(const Vector<RenderBox*>&); | |
| 85 void placeAutoMajorAxisItemsOnGrid(const Vector<RenderBox*>&); | |
| 86 void placeAutoMajorAxisItemOnGrid(RenderBox*, std::pair<size_t, size_t>& aut
oPlacementCursor); | |
| 87 GridTrackSizingDirection autoPlacementMajorAxisDirection() const; | |
| 88 GridTrackSizingDirection autoPlacementMinorAxisDirection() const; | |
| 89 | |
| 90 void layoutGridItems(); | |
| 91 void populateGridPositions(const GridSizingData&); | |
| 92 | |
| 93 typedef LayoutUnit (RenderGrid::* SizingFunction)(RenderBox*, GridTrackSizin
gDirection, Vector<GridTrack>&); | |
| 94 typedef LayoutUnit (GridTrack::* AccumulatorGetter)() const; | |
| 95 typedef void (GridTrack::* AccumulatorGrowFunction)(LayoutUnit); | |
| 96 typedef bool (GridTrackSize::* FilterFunction)() const; | |
| 97 void resolveContentBasedTrackSizingFunctionsForItems(GridTrackSizingDirectio
n, GridSizingData&, RenderBox*, FilterFunction, SizingFunction, AccumulatorGette
r, AccumulatorGrowFunction); | |
| 98 void distributeSpaceToTracks(Vector<GridTrack*>&, Vector<GridTrack*>* tracks
ForGrowthAboveMaxBreadth, AccumulatorGetter, AccumulatorGrowFunction, GridSizing
Data&, LayoutUnit& availableLogicalSpace); | |
| 99 | |
| 100 double computeNormalizedFractionBreadth(Vector<GridTrack>&, const GridSpan&
tracksSpan, GridTrackSizingDirection, LayoutUnit availableLogicalSpace) const; | |
| 101 | |
| 102 const GridTrackSize& gridTrackSize(GridTrackSizingDirection, size_t) const; | |
| 103 | |
| 104 LayoutUnit logicalHeightForChild(RenderBox*, Vector<GridTrack>&); | |
| 105 LayoutUnit minContentForChild(RenderBox*, GridTrackSizingDirection, Vector<G
ridTrack>& columnTracks); | |
| 106 LayoutUnit maxContentForChild(RenderBox*, GridTrackSizingDirection, Vector<G
ridTrack>& columnTracks); | |
| 107 LayoutUnit startOfColumnForChild(const RenderBox* child) const; | |
| 108 LayoutUnit endOfColumnForChild(const RenderBox* child) const; | |
| 109 LayoutUnit columnPositionAlignedWithGridContainerStart(const RenderBox*) con
st; | |
| 110 LayoutUnit columnPositionAlignedWithGridContainerEnd(const RenderBox*) const
; | |
| 111 LayoutUnit centeredColumnPositionForChild(const RenderBox*) const; | |
| 112 LayoutUnit columnPositionForChild(const RenderBox*) const; | |
| 113 LayoutUnit startOfRowForChild(const RenderBox* child) const; | |
| 114 LayoutUnit endOfRowForChild(const RenderBox* child) const; | |
| 115 LayoutUnit centeredRowPositionForChild(const RenderBox*) const; | |
| 116 LayoutUnit rowPositionForChild(const RenderBox*) const; | |
| 117 LayoutPoint findChildLogicalPosition(const RenderBox*) const; | |
| 118 GridCoordinate cachedGridCoordinate(const RenderBox*) const; | |
| 119 | |
| 120 LayoutUnit gridAreaBreadthForChild(const RenderBox* child, GridTrackSizingDi
rection, const Vector<GridTrack>&) const; | |
| 121 | |
| 122 virtual void paintChildren(PaintInfo&, const LayoutPoint&) override; | |
| 123 | |
| 124 bool gridIsDirty() const { return m_gridIsDirty; } | |
| 125 | |
| 126 #if ENABLE(ASSERT) | |
| 127 bool tracksAreWiderThanMinTrackBreadth(GridTrackSizingDirection, const Vecto
r<GridTrack>&); | |
| 128 #endif | |
| 129 | |
| 130 size_t gridItemSpan(const RenderBox*, GridTrackSizingDirection); | |
| 131 | |
| 132 size_t gridColumnCount() const | |
| 133 { | |
| 134 ASSERT(!gridIsDirty()); | |
| 135 return m_grid[0].size(); | |
| 136 } | |
| 137 size_t gridRowCount() const | |
| 138 { | |
| 139 ASSERT(!gridIsDirty()); | |
| 140 return m_grid.size(); | |
| 141 } | |
| 142 | |
| 143 typedef Vector<RenderBox*, 1> GridCell; | |
| 144 typedef Vector<Vector<GridCell> > GridRepresentation; | |
| 145 GridRepresentation m_grid; | |
| 146 bool m_gridIsDirty; | |
| 147 Vector<LayoutUnit> m_rowPositions; | |
| 148 Vector<LayoutUnit> m_columnPositions; | |
| 149 HashMap<const RenderBox*, GridCoordinate> m_gridItemCoordinate; | |
| 150 OrderIterator m_orderIterator; | |
| 151 Vector<RenderBox*> m_gridItemsOverflowingGridArea; | |
| 152 HashMap<const RenderBox*, size_t> m_gridItemsIndexesMap; | |
| 153 }; | |
| 154 | |
| 155 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderGrid, isRenderGrid()); | |
| 156 | |
| 157 } // namespace blink | |
| 158 | |
| 159 #endif // RenderGrid_h | |
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