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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 #include "wtf/Allocator.h" | 9 #include "wtf/Allocator.h" |
10 | 10 |
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60 LayoutUnit logicalHeightInFlowThread() const { return m_logicalBottomInFlowT
hread - m_logicalTopInFlowThread; } | 60 LayoutUnit logicalHeightInFlowThread() const { return m_logicalBottomInFlowT
hread - m_logicalTopInFlowThread; } |
61 | 61 |
62 void resetColumnHeight(); | 62 void resetColumnHeight(); |
63 bool recalculateColumnHeight(LayoutMultiColumnSet&); | 63 bool recalculateColumnHeight(LayoutMultiColumnSet&); |
64 | 64 |
65 LayoutSize flowThreadTranslationAtOffset(LayoutUnit, CoordinateSpaceConversi
on) const; | 65 LayoutSize flowThreadTranslationAtOffset(LayoutUnit, CoordinateSpaceConversi
on) const; |
66 LayoutUnit columnLogicalTopForOffset(LayoutUnit offsetInFlowThread) const; | 66 LayoutUnit columnLogicalTopForOffset(LayoutUnit offsetInFlowThread) const; |
67 LayoutPoint visualPointToFlowThreadPoint(const LayoutPoint& visualPoint) con
st; | 67 LayoutPoint visualPointToFlowThreadPoint(const LayoutPoint& visualPoint) con
st; |
68 LayoutRect fragmentsBoundingBox(const LayoutRect& boundingBoxInFlowThread) c
onst; | 68 LayoutRect fragmentsBoundingBox(const LayoutRect& boundingBoxInFlowThread) c
onst; |
69 | 69 |
70 void collectLayerFragments(PaintLayerFragments&, const LayoutRect& layerBoun
dingBox, const LayoutRect& dirtyRect) const; | 70 LayoutRect flowThreadPortionOverflowRectAt(unsigned columnIndex) const; |
| 71 |
| 72 // Get the first and the last column intersecting the specified block range. |
| 73 // Note that |logicalBottomInFlowThread| is an exclusive endpoint. |
| 74 void columnIntervalForBlockRangeInFlowThread(LayoutUnit logicalTopInFlowThre
ad, LayoutUnit logicalBottomInFlowThread, unsigned& firstColumn, unsigned& lastC
olumn) const; |
| 75 |
| 76 // Get the first and the last column intersecting the specified visual recta
ngle. |
| 77 void columnIntervalForVisualRect(const LayoutRect&, unsigned& firstColumn, u
nsigned& lastColumn) const; |
| 78 |
71 LayoutRect calculateOverflow() const; | 79 LayoutRect calculateOverflow() const; |
72 | 80 |
73 enum ColumnIndexCalculationMode { | 81 enum ColumnIndexCalculationMode { |
74 ClampToExistingColumns, // Stay within the range of already existing col
umns. | 82 ClampToExistingColumns, // Stay within the range of already existing col
umns. |
75 AssumeNewColumns // Allow column indices outside the range of already ex
isting columns. | 83 AssumeNewColumns // Allow column indices outside the range of already ex
isting columns. |
76 }; | 84 }; |
77 unsigned columnIndexAtOffset(LayoutUnit offsetInFlowThread, ColumnIndexCalcu
lationMode = ClampToExistingColumns) const; | 85 unsigned columnIndexAtOffset(LayoutUnit offsetInFlowThread, ColumnIndexCalcu
lationMode = ClampToExistingColumns) const; |
78 | 86 |
79 // The "CSS actual" value of column-count. This includes overflowing columns
, if any. | 87 // The "CSS actual" value of column-count. This includes overflowing columns
, if any. |
80 unsigned actualColumnCount() const; | 88 unsigned actualColumnCount() const; |
81 | 89 |
82 private: | 90 private: |
83 LayoutUnit heightAdjustedForRowOffset(LayoutUnit height) const; | 91 LayoutUnit heightAdjustedForRowOffset(LayoutUnit height) const; |
84 LayoutUnit calculateMaxColumnHeight() const; | 92 LayoutUnit calculateMaxColumnHeight() const; |
85 void setAndConstrainColumnHeight(LayoutUnit); | 93 void setAndConstrainColumnHeight(LayoutUnit); |
86 | 94 |
87 LayoutUnit rebalanceColumnHeightIfNeeded() const; | 95 LayoutUnit rebalanceColumnHeightIfNeeded() const; |
88 | 96 |
89 LayoutRect columnRectAt(unsigned columnIndex) const; | 97 LayoutRect columnRectAt(unsigned columnIndex) const; |
90 LayoutUnit logicalTopInFlowThreadAt(unsigned columnIndex) const { return m_l
ogicalTopInFlowThread + columnIndex * m_columnHeight; } | 98 LayoutUnit logicalTopInFlowThreadAt(unsigned columnIndex) const { return m_l
ogicalTopInFlowThread + columnIndex * m_columnHeight; } |
91 LayoutRect flowThreadPortionRectAt(unsigned columnIndex) const; | 99 LayoutRect flowThreadPortionRectAt(unsigned columnIndex) const; |
92 LayoutRect flowThreadPortionOverflowRectAt(unsigned columnIndex) const; | |
93 | 100 |
94 // Return the column that the specified visual point belongs to. Only the co
ordinate on the | 101 // Return the column that the specified visual point belongs to. Only the co
ordinate on the |
95 // column progression axis is relevant. Every point belongs to a column, eve
n if said point is | 102 // column progression axis is relevant. Every point belongs to a column, eve
n if said point is |
96 // not inside any of the columns. | 103 // not inside any of the columns. |
97 unsigned columnIndexAtVisualPoint(const LayoutPoint& visualPoint) const; | 104 unsigned columnIndexAtVisualPoint(const LayoutPoint& visualPoint) const; |
98 | 105 |
99 // Get the first and the last column intersecting the specified block range. | |
100 // Note that |logicalBottomInFlowThread| is an exclusive endpoint. | |
101 void columnIntervalForBlockRangeInFlowThread(LayoutUnit logicalTopInFlowThre
ad, LayoutUnit logicalBottomInFlowThread, unsigned& firstColumn, unsigned& lastC
olumn) const; | |
102 | |
103 // Get the first and the last column intersecting the specified visual recta
ngle. | |
104 void columnIntervalForVisualRect(const LayoutRect&, unsigned& firstColumn, u
nsigned& lastColumn) const; | |
105 | |
106 const LayoutMultiColumnSet& m_columnSet; | 106 const LayoutMultiColumnSet& m_columnSet; |
107 | 107 |
108 LayoutUnit m_logicalTop; | 108 LayoutUnit m_logicalTop; |
109 LayoutUnit m_logicalTopInFlowThread; | 109 LayoutUnit m_logicalTopInFlowThread; |
110 LayoutUnit m_logicalBottomInFlowThread; | 110 LayoutUnit m_logicalBottomInFlowThread; |
111 | 111 |
112 LayoutUnit m_columnHeight; | 112 LayoutUnit m_columnHeight; |
113 | 113 |
114 LayoutUnit m_maxColumnHeight; // Maximum column height allowed. | 114 LayoutUnit m_maxColumnHeight; // Maximum column height allowed. |
115 }; | 115 }; |
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151 | 151 |
152 private: | 152 private: |
153 LayoutMultiColumnSet& m_columnSet; | 153 LayoutMultiColumnSet& m_columnSet; |
154 | 154 |
155 Vector<MultiColumnFragmentainerGroup, 1> m_groups; | 155 Vector<MultiColumnFragmentainerGroup, 1> m_groups; |
156 }; | 156 }; |
157 | 157 |
158 } // namespace blink | 158 } // namespace blink |
159 | 159 |
160 #endif // MultiColumnFragmentainerGroup_h | 160 #endif // MultiColumnFragmentainerGroup_h |
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