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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef MultiColumnFragmentainerGroup_h | 5 #ifndef MultiColumnFragmentainerGroup_h |
6 #define MultiColumnFragmentainerGroup_h | 6 #define MultiColumnFragmentainerGroup_h |
7 | 7 |
8 #include "core/layout/LayoutMultiColumnFlowThread.h" | 8 #include "core/layout/LayoutMultiColumnFlowThread.h" |
9 | 9 |
10 namespace blink { | 10 namespace blink { |
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76 // breaks assumed so far into account. | 76 // breaks assumed so far into account. |
77 unsigned findRunWithTallestColumns() const; | 77 unsigned findRunWithTallestColumns() const; |
78 | 78 |
79 // Given the current list of content runs, make assumptions about where we n
eed to insert | 79 // Given the current list of content runs, make assumptions about where we n
eed to insert |
80 // implicit breaks (if there's room for any at all; depending on the number
of explicit breaks), | 80 // implicit breaks (if there's room for any at all; depending on the number
of explicit breaks), |
81 // and store the results. This is needed in order to balance the columns. | 81 // and store the results. This is needed in order to balance the columns. |
82 void distributeImplicitBreaks(); | 82 void distributeImplicitBreaks(); |
83 | 83 |
84 LayoutUnit calculateColumnHeight(BalancedColumnHeightCalculation) const; | 84 LayoutUnit calculateColumnHeight(BalancedColumnHeightCalculation) const; |
85 | 85 |
86 LayoutSize translationAtColumn(unsigned columnIndex) const; | |
87 LayoutRect columnRectAt(unsigned columnIndex) const; | 86 LayoutRect columnRectAt(unsigned columnIndex) const; |
88 LayoutUnit logicalTopInFlowThreadAt(unsigned columnIndex) const { return m_l
ogicalTopInFlowThread + columnIndex * m_columnHeight; } | 87 LayoutUnit logicalTopInFlowThreadAt(unsigned columnIndex) const { return m_l
ogicalTopInFlowThread + columnIndex * m_columnHeight; } |
89 LayoutRect flowThreadPortionRectAt(unsigned columnIndex) const; | 88 LayoutRect flowThreadPortionRectAt(unsigned columnIndex) const; |
90 LayoutRect flowThreadPortionOverflowRect(const LayoutRect& flowThreadPortion
, unsigned columnIndex, unsigned columnCount, LayoutUnit columnGap) const; | 89 LayoutRect flowThreadPortionOverflowRect(const LayoutRect& flowThreadPortion
, unsigned columnIndex, unsigned columnCount, LayoutUnit columnGap) const; |
91 | 90 |
92 enum ColumnIndexCalculationMode { | 91 enum ColumnIndexCalculationMode { |
93 ClampToExistingColumns, // Stay within the range of already existing col
umns. | 92 ClampToExistingColumns, // Stay within the range of already existing col
umns. |
94 AssumeNewColumns // Allow column indices outside the range of already ex
isting columns. | 93 AssumeNewColumns // Allow column indices outside the range of already ex
isting columns. |
95 }; | 94 }; |
96 unsigned columnIndexAtOffset(LayoutUnit offsetInFlowThread, ColumnIndexCalcu
lationMode = ClampToExistingColumns) const; | 95 unsigned columnIndexAtOffset(LayoutUnit offsetInFlowThread, ColumnIndexCalcu
lationMode = ClampToExistingColumns) const; |
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174 | 173 |
175 private: | 174 private: |
176 LayoutMultiColumnSet& m_columnSet; | 175 LayoutMultiColumnSet& m_columnSet; |
177 | 176 |
178 Vector<MultiColumnFragmentainerGroup, 1> m_groups; | 177 Vector<MultiColumnFragmentainerGroup, 1> m_groups; |
179 }; | 178 }; |
180 | 179 |
181 } // namespace blink | 180 } // namespace blink |
182 | 181 |
183 #endif // MultiColumnFragmentainerGroup_h | 182 #endif // MultiColumnFragmentainerGroup_h |
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