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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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| 111 // column heights changed in the previous pass, since column height changes may
affect break points | 111 // column heights changed in the previous pass, since column height changes may
affect break points |
| 112 // and pagination struts anywhere in the tree, and currently no way exists to do
this in a more | 112 // and pagination struts anywhere in the tree, and currently no way exists to do
this in a more |
| 113 // optimized manner. | 113 // optimized manner. |
| 114 // | 114 // |
| 115 // There's also some documentation online: | 115 // There's also some documentation online: |
| 116 // https://sites.google.com/a/chromium.org/dev/developers/design-documents/multi
-column-layout | 116 // https://sites.google.com/a/chromium.org/dev/developers/design-documents/multi
-column-layout |
| 117 class LayoutMultiColumnFlowThread : public LayoutFlowThread { | 117 class LayoutMultiColumnFlowThread : public LayoutFlowThread { |
| 118 public: | 118 public: |
| 119 virtual ~LayoutMultiColumnFlowThread(); | 119 virtual ~LayoutMultiColumnFlowThread(); |
| 120 | 120 |
| 121 static LayoutMultiColumnFlowThread* createAnonymous(Document&, const LayoutS
tyle& parentStyle); | 121 static LayoutMultiColumnFlowThread* createAnonymous(Document&, const Compute
dStyle& parentStyle); |
| 122 | 122 |
| 123 virtual bool isLayoutMultiColumnFlowThread() const override final { return t
rue; } | 123 virtual bool isLayoutMultiColumnFlowThread() const override final { return t
rue; } |
| 124 | 124 |
| 125 LayoutBlockFlow* multiColumnBlockFlow() const { return toLayoutBlockFlow(par
ent()); } | 125 LayoutBlockFlow* multiColumnBlockFlow() const { return toLayoutBlockFlow(par
ent()); } |
| 126 | 126 |
| 127 LayoutMultiColumnSet* firstMultiColumnSet() const; | 127 LayoutMultiColumnSet* firstMultiColumnSet() const; |
| 128 LayoutMultiColumnSet* lastMultiColumnSet() const; | 128 LayoutMultiColumnSet* lastMultiColumnSet() const; |
| 129 | 129 |
| 130 // Return the first column set or spanner placeholder. | 130 // Return the first column set or spanner placeholder. |
| 131 LayoutBox* firstMultiColumnBox() const | 131 LayoutBox* firstMultiColumnBox() const |
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| 213 LayoutUnit m_columnHeightAvailable; // Total height available to columns, or
0 if auto. | 213 LayoutUnit m_columnHeightAvailable; // Total height available to columns, or
0 if auto. |
| 214 bool m_inBalancingPass; // Set when relayouting for column balancing. | 214 bool m_inBalancingPass; // Set when relayouting for column balancing. |
| 215 bool m_needsColumnHeightsRecalculation; // Set when we need to recalculate t
he column set heights after layout. | 215 bool m_needsColumnHeightsRecalculation; // Set when we need to recalculate t
he column set heights after layout. |
| 216 bool m_progressionIsInline; // Always true for regular multicol. False for p
aged-y overflow. | 216 bool m_progressionIsInline; // Always true for regular multicol. False for p
aged-y overflow. |
| 217 bool m_isBeingEvacuated; | 217 bool m_isBeingEvacuated; |
| 218 }; | 218 }; |
| 219 | 219 |
| 220 } // namespace blink | 220 } // namespace blink |
| 221 | 221 |
| 222 #endif // LayoutMultiColumnFlowThread_h | 222 #endif // LayoutMultiColumnFlowThread_h |
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