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Side by Side Diff: Source/core/rendering/RenderMultiColumnBlock.h

Issue 143383002: Region based multicol: support explicit column breaks (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master
Patch Set: Code review. Created 6 years, 10 months ago
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1 /* 1 /*
2 * Copyright (C) 2012 Apple Inc. All rights reserved. 2 * Copyright (C) 2012 Apple Inc. All rights reserved.
3 * 3 *
4 * Redistribution and use in source and binary forms, with or without 4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions 5 * modification, are permitted provided that the following conditions
6 * are met: 6 * are met:
7 * 1. Redistributions of source code must retain the above copyright 7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer. 8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright 9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the 10 * notice, this list of conditions and the following disclaimer in the
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39 39
40 LayoutUnit columnHeightAvailable() const { return m_columnHeightAvailable; } 40 LayoutUnit columnHeightAvailable() const { return m_columnHeightAvailable; }
41 41
42 LayoutUnit columnWidth() const { return m_columnWidth; } 42 LayoutUnit columnWidth() const { return m_columnWidth; }
43 unsigned columnCount() const { return m_columnCount; } 43 unsigned columnCount() const { return m_columnCount; }
44 44
45 RenderMultiColumnFlowThread* flowThread() const { return m_flowThread; } 45 RenderMultiColumnFlowThread* flowThread() const { return m_flowThread; }
46 46
47 bool requiresBalancing() const { return !m_columnHeightAvailable || style()- >columnFill() == ColumnFillBalance; } 47 bool requiresBalancing() const { return !m_columnHeightAvailable || style()- >columnFill() == ColumnFillBalance; }
48 48
49 bool shouldRelayoutMultiColumnBlock() const; 49 bool shouldRelayoutMultiColumnBlock();
50 50
51 private: 51 private:
52 virtual bool isRenderMultiColumnBlock() const OVERRIDE { return true; } 52 virtual bool isRenderMultiColumnBlock() const OVERRIDE { return true; }
53 53
54 virtual const char* renderName() const OVERRIDE; 54 virtual const char* renderName() const OVERRIDE;
55 55
56 virtual RenderObject* layoutSpecialExcludedChild(bool relayoutChildren, Subt reeLayoutScope&) OVERRIDE; 56 virtual RenderObject* layoutSpecialExcludedChild(bool relayoutChildren, Subt reeLayoutScope&) OVERRIDE;
57 57
58 virtual void styleDidChange(StyleDifference, const RenderStyle*) OVERRIDE; 58 virtual void styleDidChange(StyleDifference, const RenderStyle*) OVERRIDE;
59 59
60 virtual bool updateLogicalWidthAndColumnWidth() OVERRIDE; 60 virtual bool updateLogicalWidthAndColumnWidth() OVERRIDE;
61 virtual void checkForPaginationLogicalHeightChange(LayoutUnit&, bool&, bool& ) OVERRIDE; 61 virtual void checkForPaginationLogicalHeightChange(LayoutUnit&, bool&, bool& ) OVERRIDE;
62 62
63 virtual bool supportsPartialLayout() const OVERRIDE { return false; } 63 virtual bool supportsPartialLayout() const OVERRIDE { return false; }
64 64
65 virtual void addChild(RenderObject* newChild, RenderObject* beforeChild = 0) OVERRIDE; 65 virtual void addChild(RenderObject* newChild, RenderObject* beforeChild = 0) OVERRIDE;
66 66
67 void computeColumnCountAndWidth(); 67 void computeColumnCountAndWidth();
68 68
69 void ensureColumnSets(); 69 void ensureColumnSets();
70 70
71 RenderMultiColumnFlowThread* m_flowThread; 71 RenderMultiColumnFlowThread* m_flowThread;
72 unsigned m_columnCount; // The default column count/width that are based o ff our containing block width. These values represent only the default, 72 unsigned m_columnCount; // The default column count/width that are based o ff our containing block width. These values represent only the default,
73 LayoutUnit m_columnWidth; // since a multi-column block that is split across variable width pages or regions will have different column counts and widths in each. 73 LayoutUnit m_columnWidth; // since a multi-column block that is split across variable width pages or regions will have different column counts and widths in each.
74 // These values will be cached (eventually) for mu lti-column blocks. 74 // These values will be cached (eventually) for mu lti-column blocks.
75 LayoutUnit m_columnHeightAvailable; // Total height available to columns, or 0 if auto. 75 LayoutUnit m_columnHeightAvailable; // Total height available to columns, or 0 if auto.
76 mutable bool m_inBalancingPass; // Set when relayouting for column balancing . 76 bool m_inBalancingPass; // Set when relayouting for column balancing.
77 bool m_needsRebalancing;
77 }; 78 };
78 79
79 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderMultiColumnBlock, isRenderMultiColumnBlock ()); 80 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderMultiColumnBlock, isRenderMultiColumnBlock ());
80 81
81 } // namespace WebCore 82 } // namespace WebCore
82 83
83 #endif // RenderMultiColumnBlock_h 84 #endif // RenderMultiColumnBlock_h
84 85
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