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 typedef Vector<RenderBox*, 1> GridCell; 56 const GridCell& gridCell(int row, int column) { return m_grid[row][column]; } 57 const Vector<RenderBox*>& itemsOverflowingGridArea() { return m_gridItemsOverflowingGridArea; } 58 int paintIndexForGridItem(const RenderBox* renderBox) { return m_gridItemsIndexesMap.get(renderBox); } 59 60 bool gridIsDirty() const { return m_gridIsDirty; } 61 62 private: 63 virtual bool isRenderGrid() const OVERRIDE { return true; } 64 virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const OVERRIDE; 65 virtual void computePreferredLogicalWidths() OVERRIDE; 66 67 virtual void addChild(RenderObject* newChild, RenderObject* beforeChild = 0) OVERRIDE; 68 void addChildToIndexesMap(RenderBox&); 69 virtual void removeChild(RenderObject*) OVERRIDE; 70 71 virtual void styleDidChange(StyleDifference, const RenderStyle*) OVERRIDE; 72 73 bool explicitGridDidResize(const RenderStyle*) const; 74 bool namedGridLinesDefinitionDidChange(const RenderStyle*) const; 75 76 class GridIterator; 77 struct GridSizingData; 78 bool gridElementIsShrinkToFit(); 79 void computeUsedBreadthOfGridTracks(GridTrackSizingDirection, GridSizingData&); 80 void computeUsedBreadthOfGridTracks(GridTrackSizingDirection, GridSizingData&, LayoutUnit& availableLogicalSpace); 81 LayoutUnit computeUsedBreadthOfMinLength(GridTrackSizingDirection, const GridLength&) const; 82 LayoutUnit computeUsedBreadthOfMaxLength(GridTrackSizingDirection, const GridLength&, LayoutUnit usedBreadth) const; 83 LayoutUnit computeUsedBreadthOfSpecifiedLength(GridTrackSizingDirection, const Length&) const; 84 void resolveContentBasedTrackSizingFunctions(GridTrackSizingDirection, GridSizingData&, LayoutUnit& availableLogicalSpace); 85 86 void ensureGridSize(size_t maximumRowIndex, size_t maximumColumnIndex); 87 void insertItemIntoGrid(RenderBox&, const GridCoordinate&); 88 void placeItemsOnGrid(); 89 void populateExplicitGridAndOrderIterator(); 90 PassOwnPtr<GridCoordinate> createEmptyGridAreaAtSpecifiedPositionsOutsideGrid(const RenderBox&, GridTrackSizingDirection, const GridSpan& specifiedPositions) const; 91 void placeSpecifiedMajorAxisItemsOnGrid(const Vector<RenderBox*>&); 92 void placeAutoMajorAxisItemsOnGrid(const Vector<RenderBox*>&); 93 void placeAutoMajorAxisItemOnGrid(RenderBox&, std::pair<size_t, size_t>& autoPlacementCursor); 94 GridTrackSizingDirection autoPlacementMajorAxisDirection() const; 95 GridTrackSizingDirection autoPlacementMinorAxisDirection() const; 96 97 void layoutGridItems(); 98 void populateGridPositions(const GridSizingData&); 99 100 typedef LayoutUnit (RenderGrid::* SizingFunction)(RenderBox&, GridTrackSizingDirection, Vector<GridTrack>&); 101 typedef LayoutUnit (GridTrack::* AccumulatorGetter)() const; 102 typedef void (GridTrack::* AccumulatorGrowFunction)(LayoutUnit); 103 typedef bool (GridTrackSize::* FilterFunction)() const; 104 void resolveContentBasedTrackSizingFunctionsForItems(GridTrackSizingDirection, GridSizingData&, RenderBox&, FilterFunction, SizingFunction, AccumulatorGetter, AccumulatorGrowFunction); 105 void distributeSpaceToTracks(Vector<GridTrack*>&, Vector<GridTrack*>* tracksForGrowthAboveMaxBreadth, AccumulatorGetter, AccumulatorGrowFunction, GridSizingData&, LayoutUnit& availableLogicalSpace); 106 107 double computeNormalizedFractionBreadth(Vector<GridTrack>&, const GridSpan& tracksSpan, GridTrackSizingDirection, LayoutUnit availableLogicalSpace) const; 108 109 GridTrackSize gridTrackSize(GridTrackSizingDirection, size_t) const; 110 111 LayoutUnit logicalHeightForChild(RenderBox&, Vector<GridTrack>&); 112 LayoutUnit minContentForChild(RenderBox&, GridTrackSizingDirection, Vector<GridTrack>& columnTracks); 113 LayoutUnit maxContentForChild(RenderBox&, GridTrackSizingDirection, Vector<GridTrack>& columnTracks); 114 LayoutUnit startOfColumnForChild(const RenderBox& child) const; 115 LayoutUnit endOfColumnForChild(const RenderBox& child) const; 116 LayoutUnit columnPositionAlignedWithGridContainerStart(const RenderBox&) const; 117 LayoutUnit columnPositionAlignedWithGridContainerEnd(const RenderBox&) const; 118 LayoutUnit centeredColumnPositionForChild(const RenderBox&) const; 119 LayoutUnit columnPositionForChild(const RenderBox&) const; 120 LayoutUnit startOfRowForChild(const RenderBox& child) const; 121 LayoutUnit endOfRowForChild(const RenderBox& child) const; 122 LayoutUnit centeredRowPositionForChild(const RenderBox&) const; 123 LayoutUnit rowPositionForChild(const RenderBox&) const; 124 LayoutPoint findChildLogicalPosition(const RenderBox&) const; 125 GridCoordinate cachedGridCoordinate(const RenderBox&) const; 126 127 LayoutUnit gridAreaBreadthForChild(const RenderBox& child, GridTrackSizingDirection, const Vector<GridTrack>&) const; 128 129 virtual void paintChildren(PaintInfo&, const LayoutPoint&) OVERRIDE; 130 131 #if ENABLE(ASSERT) 132 bool tracksAreWiderThanMinTrackBreadth(GridTrackSizingDirection, const Vector<GridTrack>&); 133 #endif 134 135 size_t gridItemSpan(const RenderBox&, GridTrackSizingDirection); 136 137 size_t gridColumnCount() const 138 { 139 ASSERT(!gridIsDirty()); 140 return m_grid[0].size(); 141 } 142 size_t gridRowCount() const 143 { 144 ASSERT(!gridIsDirty()); 145 return m_grid.size(); 146 } 147 148 typedef Vector<Vector<GridCell> > GridRepresentation; 149 GridRepresentation m_grid; 150 bool m_gridIsDirty; 151 Vector<LayoutUnit> m_rowPositions; 152 Vector<LayoutUnit> m_columnPositions; 153 HashMap<const RenderBox*, GridCoordinate> m_gridItemCoordinate; 154 OrderIterator m_orderIterator; 155 Vector<RenderBox*> m_gridItemsOverflowingGridArea; 156 HashMap<const RenderBox*, size_t> m_gridItemsIndexesMap; 157 }; 158 159 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderGrid, isRenderGrid()); 160 161 } // namespace blink 162 163 #endif // RenderGrid_h 164
