Source/WebCore/rendering/RenderGrid.h

   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 "RenderBlock.h"
  30
  31 namespace WebCore {
  32
  33 class GridTrack;
  34
  35 class RenderGrid : public RenderBlock {
  36 public:
  37     RenderGrid(Element*);
  38     virtual ~RenderGrid();
  39
  40     virtual const char* renderName() const OVERRIDE;
  41
  42     virtual void layoutBlock(bool relayoutChildren, LayoutUnit pageLogicalHeight = 0) OVERRIDE;
  43
  44     virtual bool avoidsFloats() const OVERRIDE { return true; }
  45     virtual bool canCollapseAnonymousBlockChild() const OVERRIDE { return false; }
  46
  47 private:
  48     virtual bool isRenderGrid() const OVERRIDE { return true; }
  49     virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const OVERRIDE;
  50     virtual void computePreferredLogicalWidths() OVERRIDE;
  51
  52     LayoutUnit computePreferredTrackWidth(const Length&, size_t) const;
  53
  54     class GridIterator;
  55     enum TrackSizingDirection { ForColumns, ForRows };
  56     void computedUsedBreadthOfGridTracks(TrackSizingDirection, Vector<GridTrack>& columnTracks, Vector<GridTrack>& rowTracks);
  57     LayoutUnit computeUsedBreadthOfMinLength(TrackSizingDirection, const Length&) const;
  58     LayoutUnit computeUsedBreadthOfMaxLength(TrackSizingDirection, const Length&) const;
  59     LayoutUnit computeUsedBreadthOfSpecifiedLength(TrackSizingDirection, const Length&) const;
  60     void resolveContentBasedTrackSizingFunctions(TrackSizingDirection, Vector<GridTrack>& columnTracks, Vector<GridTrack>& rowTracks, LayoutUnit& availableLogicalSpace);
  61     void placeItemsOnGrid();
  62     void layoutGridItems();
  63
  64     typedef LayoutUnit (RenderGrid::* SizingFunction)(RenderBox*, TrackSizingDirection, Vector<GridTrack>&);
  65     typedef LayoutUnit (GridTrack::* AccumulatorGetter)() const;
  66     typedef void (GridTrack::* AccumulatorGrowFunction)(LayoutUnit);
  67     void resolveContentBasedTrackSizingFunctionsForItems(TrackSizingDirection, Vector<GridTrack>& columnTracks, Vector<GridTrack>& rowTracks, size_t, SizingFunction, AccumulatorGetter, AccumulatorGrowFunction);
  68     void distributeSpaceToTracks(Vector<GridTrack*>&, Vector<GridTrack*>* tracksForGrowthAboveMaxBreadth, AccumulatorGetter, AccumulatorGrowFunction, LayoutUnit& availableLogicalSpace);
  69
  70     const GridTrackSize& gridTrackSize(TrackSizingDirection, size_t);
  71     size_t maximumIndexInDirection(TrackSizingDirection) const;
  72
  73     LayoutUnit logicalContentHeightForChild(RenderBox*, Vector<GridTrack>&);
  74     LayoutUnit minContentForChild(RenderBox*, TrackSizingDirection, Vector<GridTrack>& columnTracks);
  75     LayoutUnit maxContentForChild(RenderBox*, TrackSizingDirection, Vector<GridTrack>& columnTracks);
  76     LayoutPoint findChildLogicalPosition(RenderBox*, const Vector<GridTrack>& columnTracks, const Vector<GridTrack>& rowTracks);
  77     size_t resolveGridPosition(TrackSizingDirection, const RenderObject*) const;
  78     size_t resolveGridPosition(const GridPosition&) const;
  79
  80 #ifndef NDEBUG
  81     bool tracksAreWiderThanMinTrackBreadth(TrackSizingDirection, const Vector<GridTrack>&);
  82 #endif
  83
  84     size_t gridColumnCount() const { return m_grid.isEmpty() ? 0 : m_grid[0].size(); }
  85     size_t gridRowCount() const { return m_grid.size(); }
  86
  87     Vector<Vector<Vector<RenderBox*, 1> > > m_grid;
  88 };
  89
  90 } // namespace WebCore
  91
  92 #endif // RenderGrid_h