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

Issue 792803002: [New Multicolumn] Layout support for column-span:all. (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@347325-placeholder
Patch Set: Code review. If there are no sets, return early. Created 5 years, 11 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
(...skipping 119 matching lines...) Expand 10 before | Expand all | Expand 10 after
130 void populate(); 130 void populate();
131 131
132 // Empty the flow thread by moving everything to the parent. Remove all mult icol specific 132 // Empty the flow thread by moving everything to the parent. Remove all mult icol specific
133 // renderers. Then destroy the flow thread. Called when a multicol container becomes a regular 133 // renderers. Then destroy the flow thread. Called when a multicol container becomes a regular
134 // block. 134 // block.
135 void evacuateAndDestroy(); 135 void evacuateAndDestroy();
136 136
137 unsigned columnCount() const { return m_columnCount; } 137 unsigned columnCount() const { return m_columnCount; }
138 LayoutUnit columnHeightAvailable() const { return m_columnHeightAvailable; } 138 LayoutUnit columnHeightAvailable() const { return m_columnHeightAvailable; }
139 void setColumnHeightAvailable(LayoutUnit available) { m_columnHeightAvailabl e = available; } 139 void setColumnHeightAvailable(LayoutUnit available) { m_columnHeightAvailabl e = available; }
140 virtual bool heightIsAuto() const { return !columnHeightAvailable() || multi ColumnBlockFlow()->style()->columnFill() == ColumnFillBalance; }
141 bool progressionIsInline() const { return m_progressionIsInline; } 140 bool progressionIsInline() const { return m_progressionIsInline; }
142 141
143 virtual LayoutSize columnOffset(const LayoutPoint&) const override final; 142 virtual LayoutSize columnOffset(const LayoutPoint&) const override final;
144 143
145 // Do we need to set a new width and lay out? 144 // Do we need to set a new width and lay out?
146 virtual bool needsNewWidth() const; 145 virtual bool needsNewWidth() const;
147 146
147 virtual RenderMultiColumnSet* columnSetAtBlockOffset(LayoutUnit) const overr ide final;
148
148 void layoutColumns(bool relayoutChildren, SubtreeLayoutScope&); 149 void layoutColumns(bool relayoutChildren, SubtreeLayoutScope&);
149 150
150 bool recalculateColumnHeights(); 151 bool recalculateColumnHeights();
151 152
152 protected: 153 protected:
153 RenderMultiColumnFlowThread(); 154 RenderMultiColumnFlowThread();
154 void setProgressionIsInline(bool isInline) { m_progressionIsInline = isInlin e; } 155 void setProgressionIsInline(bool isInline) { m_progressionIsInline = isInlin e; }
155 156
156 virtual void layout() override; 157 virtual void layout() override;
157 158
158 private: 159 private:
159 void calculateColumnCountAndWidth(LayoutUnit& width, unsigned& count) const; 160 void calculateColumnCountAndWidth(LayoutUnit& width, unsigned& count) const;
160 void createAndInsertMultiColumnSet(); 161 void createAndInsertMultiColumnSet();
161 void createAndInsertSpannerPlaceholder(RenderBox* spanner); 162 void createAndInsertSpannerPlaceholder(RenderBox* spanner);
162 virtual bool descendantIsValidColumnSpanner(RenderObject* descendant) const; 163 virtual bool descendantIsValidColumnSpanner(RenderObject* descendant) const;
163 164
164 virtual const char* renderName() const override; 165 virtual const char* renderName() const override;
165 virtual void addRegionToThread(RenderMultiColumnSet*) override; 166 virtual void addRegionToThread(RenderMultiColumnSet*) override;
166 virtual void willBeRemovedFromTree() override; 167 virtual void willBeRemovedFromTree() override;
168 virtual LayoutUnit skipColumnSpanner(RenderBox*, LayoutUnit logicalTopInFlow Thread) override;
167 virtual void flowThreadDescendantWasInserted(RenderObject*) override; 169 virtual void flowThreadDescendantWasInserted(RenderObject*) override;
168 virtual void flowThreadDescendantWillBeRemoved(RenderObject*) override; 170 virtual void flowThreadDescendantWillBeRemoved(RenderObject*) override;
169 virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logic alTop, LogicalExtentComputedValues&) const override; 171 virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logic alTop, LogicalExtentComputedValues&) const override;
170 virtual void updateLogicalWidth() override; 172 virtual void updateLogicalWidth() override;
171 virtual void setPageBreak(LayoutUnit offset, LayoutUnit spaceShortage) overr ide; 173 virtual void setPageBreak(LayoutUnit offset, LayoutUnit spaceShortage) overr ide;
172 virtual void updateMinimumPageHeight(LayoutUnit offset, LayoutUnit minHeight ) override; 174 virtual void updateMinimumPageHeight(LayoutUnit offset, LayoutUnit minHeight ) override;
173 virtual RenderMultiColumnSet* columnSetAtBlockOffset(LayoutUnit) const overr ide;
174 virtual bool addForcedRegionBreak(LayoutUnit, RenderObject* breakChild, bool isBefore, LayoutUnit* offsetBreakAdjustment = 0) override; 175 virtual bool addForcedRegionBreak(LayoutUnit, RenderObject* breakChild, bool isBefore, LayoutUnit* offsetBreakAdjustment = 0) override;
175 virtual bool isPageLogicalHeightKnown() const override; 176 virtual bool isPageLogicalHeightKnown() const override;
176 177
178 // The last set we worked on. It's not to be used as the "current set". The concept of a
179 // "current set" is difficult, since layout may jump back and forth in the t ree, due to wrong
180 // top location estimates (due to e.g. margin collapsing), and possibly for other reasons.
181 RenderMultiColumnSet* m_lastSetWorkedOn;
182
177 unsigned m_columnCount; // The used value of column-count 183 unsigned m_columnCount; // The used value of column-count
178 LayoutUnit m_columnHeightAvailable; // Total height available to columns, or 0 if auto. 184 LayoutUnit m_columnHeightAvailable; // Total height available to columns, or 0 if auto.
179 bool m_inBalancingPass; // Set when relayouting for column balancing. 185 bool m_inBalancingPass; // Set when relayouting for column balancing.
180 bool m_needsColumnHeightsRecalculation; // Set when we need to recalculate t he column set heights after layout. 186 bool m_needsColumnHeightsRecalculation; // Set when we need to recalculate t he column set heights after layout.
181 bool m_progressionIsInline; // Always true for regular multicol. False for p aged-y overflow. 187 bool m_progressionIsInline; // Always true for regular multicol. False for p aged-y overflow.
182 bool m_isBeingEvacuated; 188 bool m_isBeingEvacuated;
183 }; 189 };
184 190
185 } // namespace blink 191 } // namespace blink
186 192
187 #endif // RenderMultiColumnFlowThread_h 193 #endif // RenderMultiColumnFlowThread_h
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