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

Issue 288263002: [New Multicolumn] Rebalance properly when child content changes. (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master
Patch Set: rebase master Created 6 years, 7 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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101 bool recalculateColumnHeight(bool initial); 101 bool recalculateColumnHeight(bool initial);
102 102
103 // Record space shortage (the amount of space that would have been enough to prevent some 103 // Record space shortage (the amount of space that would have been enough to prevent some
104 // element from being moved to the next column) at a column break. The small est amount of space 104 // element from being moved to the next column) at a column break. The small est amount of space
105 // shortage we find is the amount with which we will stretch the column heig ht, if it turns out 105 // shortage we find is the amount with which we will stretch the column heig ht, if it turns out
106 // after layout that the columns weren't tall enough. 106 // after layout that the columns weren't tall enough.
107 void recordSpaceShortage(LayoutUnit spaceShortage); 107 void recordSpaceShortage(LayoutUnit spaceShortage);
108 108
109 virtual void updateLogicalWidth() OVERRIDE; 109 virtual void updateLogicalWidth() OVERRIDE;
110 110
111 void prepareForLayout(); 111 void prepareForLayout(bool initial);
112 112
113 // Expand this set's flow thread portion rectangle to contain all trailing f low thread 113 // Expand this set's flow thread portion rectangle to contain all trailing f low thread
114 // overflow. Only to be called on the last set. 114 // overflow. Only to be called on the last set.
115 void expandToEncompassFlowThreadContentsIfNeeded(); 115 void expandToEncompassFlowThreadContentsIfNeeded();
116 116
117 private: 117 private:
118 RenderMultiColumnSet(RenderFlowThread*); 118 RenderMultiColumnSet(RenderFlowThread*);
119 119
120 virtual void layout() OVERRIDE; 120 virtual void layout() OVERRIDE;
121 virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logic alTop, LogicalExtentComputedValues&) const OVERRIDE; 121 virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logic alTop, LogicalExtentComputedValues&) const OVERRIDE;
122 122
123 virtual void paintObject(PaintInfo&, const LayoutPoint& paintOffset) OVERRID E; 123 virtual void paintObject(PaintInfo&, const LayoutPoint& paintOffset) OVERRID E;
124 124
125 virtual LayoutUnit pageLogicalWidth() const OVERRIDE { return m_computedColu mnWidth; } 125 virtual LayoutUnit pageLogicalWidth() const OVERRIDE { return m_computedColu mnWidth; }
126 virtual LayoutUnit pageLogicalHeight() const OVERRIDE { return m_computedCol umnHeight; } 126 virtual LayoutUnit pageLogicalHeight() const OVERRIDE { return m_computedCol umnHeight; }
127 127
128 virtual LayoutUnit pageLogicalTopForOffset(LayoutUnit offset) const OVERRIDE ; 128 virtual LayoutUnit pageLogicalTopForOffset(LayoutUnit offset) const OVERRIDE ;
129 129
130 virtual LayoutUnit logicalHeightOfAllFlowThreadContent() const OVERRIDE { re turn logicalHeightInFlowThread(); } 130 virtual LayoutUnit logicalHeightOfAllFlowThreadContent() const OVERRIDE { re turn logicalHeightInFlowThread(); }
131 131
132 virtual void repaintFlowThreadContent(const LayoutRect& repaintRect) const O VERRIDE; 132 virtual void repaintFlowThreadContent(const LayoutRect& repaintRect) const O VERRIDE;
133 133
134 virtual void collectLayerFragments(LayerFragments&, const LayoutRect& layerB oundingBox, const LayoutRect& dirtyRect) OVERRIDE; 134 virtual void collectLayerFragments(LayerFragments&, const LayoutRect& layerB oundingBox, const LayoutRect& dirtyRect) OVERRIDE;
135 135
136 virtual const char* renderName() const OVERRIDE; 136 virtual const char* renderName() const OVERRIDE;
137 137
138 void paintColumnRules(PaintInfo&, const LayoutPoint& paintOffset); 138 void paintColumnRules(PaintInfo&, const LayoutPoint& paintOffset);
139 139
140 LayoutUnit calculateMaxColumnHeight() const;
140 LayoutUnit columnGap() const; 141 LayoutUnit columnGap() const;
141 LayoutRect columnRectAt(unsigned index) const; 142 LayoutRect columnRectAt(unsigned index) const;
142 unsigned columnCount() const; 143 unsigned columnCount() const;
143 144
144 LayoutRect flowThreadPortionRectAt(unsigned index) const; 145 LayoutRect flowThreadPortionRectAt(unsigned index) const;
145 LayoutRect flowThreadPortionOverflowRect(const LayoutRect& flowThreadPortion , unsigned index, unsigned colCount, LayoutUnit colGap) const; 146 LayoutRect flowThreadPortionOverflowRect(const LayoutRect& flowThreadPortion , unsigned index, unsigned colCount, LayoutUnit colGap) const;
146 147
147 enum ColumnIndexCalculationMode { 148 enum ColumnIndexCalculationMode {
148 ClampToExistingColumns, // Stay within the range of already existing col umns. 149 ClampToExistingColumns, // Stay within the range of already existing col umns.
149 AssumeNewColumns // Allow column indices outside the range of already ex isting columns. 150 AssumeNewColumns // Allow column indices outside the range of already ex isting columns.
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199 }; 200 };
200 Vector<ContentRun, 1> m_contentRuns; 201 Vector<ContentRun, 1> m_contentRuns;
201 }; 202 };
202 203
203 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderMultiColumnSet, isRenderMultiColumnSet()); 204 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderMultiColumnSet, isRenderMultiColumnSet());
204 205
205 } // namespace WebCore 206 } // namespace WebCore
206 207
207 #endif // RenderMultiColumnSet_h 208 #endif // RenderMultiColumnSet_h
208 209
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