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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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43 // Being a "region", a column set has no children on its own, but is merely used
to slice a portion | 43 // Being a "region", a column set has no children on its own, but is merely used
to slice a portion |
44 // of the tall "single-column" flow thread into actual columns visually, to conv
ert from flow thread | 44 // of the tall "single-column" flow thread into actual columns visually, to conv
ert from flow thread |
45 // coordinates to visual ones. It is in charge of both positioning columns corre
ctly relatively to | 45 // coordinates to visual ones. It is in charge of both positioning columns corre
ctly relatively to |
46 // the parent multicol container, and to calculate the correct translation for e
ach column's | 46 // the parent multicol container, and to calculate the correct translation for e
ach column's |
47 // contents, and to paint any rules between them. RenderMultiColumnSet objects a
re used for | 47 // contents, and to paint any rules between them. RenderMultiColumnSet objects a
re used for |
48 // painting, hit testing, and any other type of operation that requires mapping
from flow thread | 48 // painting, hit testing, and any other type of operation that requires mapping
from flow thread |
49 // coordinates to visual coordinates. | 49 // coordinates to visual coordinates. |
50 // | 50 // |
51 // Column spans result in the creation of new column sets, since a spanning rend
erer has to be | 51 // Column spans result in the creation of new column sets, since a spanning rend
erer has to be |
52 // placed in between the column sets that come before and after the span. | 52 // placed in between the column sets that come before and after the span. |
53 class RenderMultiColumnSet FINAL : public RenderRegion { | 53 class RenderMultiColumnSet final : public RenderRegion { |
54 public: | 54 public: |
55 enum BalancedHeightCalculation { GuessFromFlowThreadPortion, StretchBySpaceS
hortage }; | 55 enum BalancedHeightCalculation { GuessFromFlowThreadPortion, StretchBySpaceS
hortage }; |
56 | 56 |
57 static RenderMultiColumnSet* createAnonymous(RenderFlowThread*, RenderStyle*
parentStyle); | 57 static RenderMultiColumnSet* createAnonymous(RenderFlowThread*, RenderStyle*
parentStyle); |
58 | 58 |
59 virtual bool isRenderMultiColumnSet() const OVERRIDE { return true; } | 59 virtual bool isRenderMultiColumnSet() const override { return true; } |
60 | 60 |
61 virtual LayoutUnit pageLogicalWidth() const OVERRIDE FINAL { return flowThre
ad()->logicalWidth(); } | 61 virtual LayoutUnit pageLogicalWidth() const override final { return flowThre
ad()->logicalWidth(); } |
62 virtual LayoutUnit pageLogicalHeight() const OVERRIDE FINAL { return m_colum
nHeight; } | 62 virtual LayoutUnit pageLogicalHeight() const override final { return m_colum
nHeight; } |
63 | 63 |
64 RenderBlockFlow* multiColumnBlockFlow() const { return toRenderBlockFlow(par
ent()); } | 64 RenderBlockFlow* multiColumnBlockFlow() const { return toRenderBlockFlow(par
ent()); } |
65 RenderMultiColumnFlowThread* multiColumnFlowThread() const | 65 RenderMultiColumnFlowThread* multiColumnFlowThread() const |
66 { | 66 { |
67 ASSERT_WITH_SECURITY_IMPLICATION(!flowThread() || flowThread()->isRender
MultiColumnFlowThread()); | 67 ASSERT_WITH_SECURITY_IMPLICATION(!flowThread() || flowThread()->isRender
MultiColumnFlowThread()); |
68 return static_cast<RenderMultiColumnFlowThread*>(flowThread()); | 68 return static_cast<RenderMultiColumnFlowThread*>(flowThread()); |
69 } | 69 } |
70 | 70 |
71 RenderMultiColumnSet* nextSiblingMultiColumnSet() const; | 71 RenderMultiColumnSet* nextSiblingMultiColumnSet() const; |
72 RenderMultiColumnSet* previousSiblingMultiColumnSet() const; | 72 RenderMultiColumnSet* previousSiblingMultiColumnSet() const; |
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123 void collectLayerFragments(LayerFragments&, const LayoutRect& layerBoundingB
ox, const LayoutRect& dirtyRect); | 123 void collectLayerFragments(LayerFragments&, const LayoutRect& layerBoundingB
ox, const LayoutRect& dirtyRect); |
124 | 124 |
125 LayoutUnit columnGap() const; | 125 LayoutUnit columnGap() const; |
126 | 126 |
127 // The "CSS actual" value of column-count. This includes overflowing columns
, if any. | 127 // The "CSS actual" value of column-count. This includes overflowing columns
, if any. |
128 unsigned actualColumnCount() const; | 128 unsigned actualColumnCount() const; |
129 | 129 |
130 private: | 130 private: |
131 RenderMultiColumnSet(RenderFlowThread*); | 131 RenderMultiColumnSet(RenderFlowThread*); |
132 | 132 |
133 virtual void insertedIntoTree() OVERRIDE FINAL; | 133 virtual void insertedIntoTree() override final; |
134 virtual void willBeRemovedFromTree() OVERRIDE FINAL; | 134 virtual void willBeRemovedFromTree() override final; |
135 | 135 |
136 virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logic
alTop, LogicalExtentComputedValues&) const OVERRIDE; | 136 virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logic
alTop, LogicalExtentComputedValues&) const override; |
137 | 137 |
138 virtual void paintObject(PaintInfo&, const LayoutPoint& paintOffset) OVERRID
E; | 138 virtual void paintObject(PaintInfo&, const LayoutPoint& paintOffset) overrid
e; |
139 | 139 |
140 virtual void addOverflowFromChildren() OVERRIDE; | 140 virtual void addOverflowFromChildren() override; |
141 | 141 |
142 virtual const char* renderName() const OVERRIDE; | 142 virtual const char* renderName() const override; |
143 | 143 |
144 LayoutUnit calculateMaxColumnHeight() const; | 144 LayoutUnit calculateMaxColumnHeight() const; |
145 LayoutRect columnRectAt(unsigned index) const; | 145 LayoutRect columnRectAt(unsigned index) const; |
146 | 146 |
147 | 147 |
148 LayoutRect flowThreadPortionRectAt(unsigned index) const; | 148 LayoutRect flowThreadPortionRectAt(unsigned index) const; |
149 LayoutRect flowThreadPortionOverflowRect(const LayoutRect& flowThreadPortion
, unsigned index, unsigned colCount, LayoutUnit colGap) const; | 149 LayoutRect flowThreadPortionOverflowRect(const LayoutRect& flowThreadPortion
, unsigned index, unsigned colCount, LayoutUnit colGap) const; |
150 | 150 |
151 enum ColumnIndexCalculationMode { | 151 enum ColumnIndexCalculationMode { |
152 ClampToExistingColumns, // Stay within the range of already existing col
umns. | 152 ClampToExistingColumns, // Stay within the range of already existing col
umns. |
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201 }; | 201 }; |
202 Vector<ContentRun, 1> m_contentRuns; | 202 Vector<ContentRun, 1> m_contentRuns; |
203 }; | 203 }; |
204 | 204 |
205 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderMultiColumnSet, isRenderMultiColumnSet()); | 205 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderMultiColumnSet, isRenderMultiColumnSet()); |
206 | 206 |
207 } // namespace blink | 207 } // namespace blink |
208 | 208 |
209 #endif // RenderMultiColumnSet_h | 209 #endif // RenderMultiColumnSet_h |
210 | 210 |
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