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 WebCore { 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 avoidsFloats()48 virtual bool avoidsFloats() const OVERRIDE { return true; } canCollapseAnonymousBlockChild()49 virtual bool canCollapseAnonymousBlockChild() const OVERRIDE { return false; } 50 51 void dirtyGrid(); 52 columnPositions()53 const Vector<LayoutUnit>& columnPositions() const { return m_columnPositions; } rowPositions()54 const Vector<LayoutUnit>& rowPositions() const { return m_rowPositions; } 55 56 private: isRenderGrid()57 virtual bool isRenderGrid() const OVERRIDE { return true; } 58 virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const OVERRIDE; 59 virtual void computePreferredLogicalWidths() OVERRIDE; 60 61 virtual void addChild(RenderObject* newChild, RenderObject* beforeChild = 0) OVERRIDE; 62 void addChildToIndexesMap(RenderBox*); 63 virtual void removeChild(RenderObject*) OVERRIDE; 64 65 virtual void styleDidChange(StyleDifference, const RenderStyle*) OVERRIDE; 66 67 bool explicitGridDidResize(const RenderStyle*) const; 68 bool namedGridLinesDefinitionDidChange(const RenderStyle*) const; 69 70 class GridIterator; 71 struct GridSizingData; 72 bool gridElementIsShrinkToFit(); 73 void computeUsedBreadthOfGridTracks(GridTrackSizingDirection, GridSizingData&); 74 void computeUsedBreadthOfGridTracks(GridTrackSizingDirection, GridSizingData&, LayoutUnit& availableLogicalSpace); 75 LayoutUnit computeUsedBreadthOfMinLength(GridTrackSizingDirection, const GridLength&) const; 76 LayoutUnit computeUsedBreadthOfMaxLength(GridTrackSizingDirection, const GridLength&, LayoutUnit usedBreadth) const; 77 LayoutUnit computeUsedBreadthOfSpecifiedLength(GridTrackSizingDirection, const Length&) const; 78 void resolveContentBasedTrackSizingFunctions(GridTrackSizingDirection, GridSizingData&, LayoutUnit& availableLogicalSpace); 79 80 void ensureGridSize(size_t maximumRowIndex, size_t maximumColumnIndex); 81 void insertItemIntoGrid(RenderBox*, const GridCoordinate&); 82 void placeItemsOnGrid(); 83 void populateExplicitGridAndOrderIterator(); 84 PassOwnPtr<GridCoordinate> createEmptyGridAreaAtSpecifiedPositionsOutsideGrid(const RenderBox*, GridTrackSizingDirection, const GridSpan& specifiedPositions) const; 85 void placeSpecifiedMajorAxisItemsOnGrid(const Vector<RenderBox*>&); 86 void placeAutoMajorAxisItemsOnGrid(const Vector<RenderBox*>&); 87 void placeAutoMajorAxisItemOnGrid(RenderBox*); 88 GridTrackSizingDirection autoPlacementMajorAxisDirection() const; 89 GridTrackSizingDirection autoPlacementMinorAxisDirection() const; 90 91 void layoutGridItems(); 92 void populateGridPositions(const GridSizingData&); 93 94 typedef LayoutUnit (RenderGrid::* SizingFunction)(RenderBox*, GridTrackSizingDirection, Vector<GridTrack>&); 95 typedef LayoutUnit (GridTrack::* AccumulatorGetter)() const; 96 typedef void (GridTrack::* AccumulatorGrowFunction)(LayoutUnit); 97 typedef bool (GridTrackSize::* FilterFunction)() const; 98 void resolveContentBasedTrackSizingFunctionsForItems(GridTrackSizingDirection, GridSizingData&, RenderBox*, FilterFunction, SizingFunction, AccumulatorGetter, AccumulatorGrowFunction); 99 void distributeSpaceToTracks(Vector<GridTrack*>&, Vector<GridTrack*>* tracksForGrowthAboveMaxBreadth, AccumulatorGetter, AccumulatorGrowFunction, GridSizingData&, LayoutUnit& availableLogicalSpace); 100 101 double computeNormalizedFractionBreadth(Vector<GridTrack>&, const GridSpan& tracksSpan, GridTrackSizingDirection, LayoutUnit availableLogicalSpace) const; 102 103 const GridTrackSize& gridTrackSize(GridTrackSizingDirection, size_t) const; 104 105 LayoutUnit logicalHeightForChild(RenderBox*, Vector<GridTrack>&); 106 LayoutUnit minContentForChild(RenderBox*, GridTrackSizingDirection, Vector<GridTrack>& columnTracks); 107 LayoutUnit maxContentForChild(RenderBox*, GridTrackSizingDirection, Vector<GridTrack>& columnTracks); 108 LayoutUnit startOfColumnForChild(const RenderBox* child) const; 109 LayoutUnit endOfColumnForChild(const RenderBox* child) const; 110 LayoutUnit columnPositionAlignedWithGridContainerStart(const RenderBox*) const; 111 LayoutUnit columnPositionAlignedWithGridContainerEnd(const RenderBox*) const; 112 LayoutUnit centeredColumnPositionForChild(const RenderBox*) const; 113 LayoutUnit columnPositionForChild(const RenderBox*) const; 114 LayoutUnit rowPositionForChild(const RenderBox*) const; 115 LayoutPoint findChildLogicalPosition(const RenderBox*) const; 116 GridCoordinate cachedGridCoordinate(const RenderBox*) const; 117 118 LayoutUnit gridAreaBreadthForChild(const RenderBox* child, GridTrackSizingDirection, const Vector<GridTrack>&) const; 119 120 virtual void paintChildren(PaintInfo&, const LayoutPoint&) OVERRIDE; 121 gridIsDirty()122 bool gridIsDirty() const { return m_gridIsDirty; } 123 124 #ifndef NDEBUG 125 bool tracksAreWiderThanMinTrackBreadth(GridTrackSizingDirection, const Vector<GridTrack>&); 126 #endif 127 gridColumnCount()128 size_t gridColumnCount() const 129 { 130 ASSERT(!gridIsDirty()); 131 return m_grid[0].size(); 132 } gridRowCount()133 size_t gridRowCount() const 134 { 135 ASSERT(!gridIsDirty()); 136 return m_grid.size(); 137 } 138 139 typedef Vector<RenderBox*, 1> GridCell; 140 typedef Vector<Vector<GridCell> > GridRepresentation; 141 GridRepresentation m_grid; 142 bool m_gridIsDirty; 143 Vector<LayoutUnit> m_rowPositions; 144 Vector<LayoutUnit> m_columnPositions; 145 HashMap<const RenderBox*, GridCoordinate> m_gridItemCoordinate; 146 OrderIterator m_orderIterator; 147 Vector<RenderBox*> m_gridItemsOverflowingGridArea; 148 HashMap<const RenderBox*, size_t> m_gridItemsIndexesMap; 149 }; 150 151 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderGrid, isRenderGrid()); 152 153 } // namespace WebCore 154 155 #endif // RenderGrid_h 156