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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 | 43 |
44 LayoutMultiColumnSet* LayoutMultiColumnSet::createAnonymous(LayoutFlowThread& fl owThread, const ComputedStyle& parentStyle) | 44 LayoutMultiColumnSet* LayoutMultiColumnSet::createAnonymous(LayoutFlowThread& fl owThread, const ComputedStyle& parentStyle) |
45 { | 45 { |
46 Document& document = flowThread.document(); | 46 Document& document = flowThread.document(); |
47 LayoutMultiColumnSet* layoutObject = new LayoutMultiColumnSet(&flowThread); | 47 LayoutMultiColumnSet* layoutObject = new LayoutMultiColumnSet(&flowThread); |
48 layoutObject->setDocumentForAnonymous(&document); | 48 layoutObject->setDocumentForAnonymous(&document); |
49 layoutObject->setStyle(ComputedStyle::createAnonymousStyleWithDisplay(parent Style, BLOCK)); | 49 layoutObject->setStyle(ComputedStyle::createAnonymousStyleWithDisplay(parent Style, BLOCK)); |
50 return layoutObject; | 50 return layoutObject; |
51 } | 51 } |
52 | 52 |
53 MultiColumnFragmentainerGroup& LayoutMultiColumnSet::fragmentainerGroupAtFlowThr eadOffset(LayoutUnit) | 53 unsigned LayoutMultiColumnSet::fragmentainerGroupIndexAtFlowThreadOffset(LayoutU nit flowThreadOffset) const |
54 { | 54 { |
55 // FIXME: implement this, once we have support for multiple rows. | 55 ASSERT(m_fragmentainerGroups.size() > 0); |
56 return m_fragmentainerGroups.first(); | 56 if (flowThreadOffset <= 0) |
57 } | 57 return 0; |
58 | 58 // TODO(mstensho): Introduce an interval tree or similar to speed up this. |
59 const MultiColumnFragmentainerGroup& LayoutMultiColumnSet::fragmentainerGroupAtF lowThreadOffset(LayoutUnit) const | 59 for (unsigned index = 0; index < m_fragmentainerGroups.size(); index++) { |
60 { | 60 const auto& row = m_fragmentainerGroups[index]; |
61 // FIXME: implement this, once we have support for multiple rows. | 61 if (row.logicalTopInFlowThread() <= flowThreadOffset && row.logicalBotto mInFlowThread() > flowThreadOffset) |
62 return m_fragmentainerGroups.first(); | 62 return index; |
63 } | |
64 return m_fragmentainerGroups.size() - 1; | |
63 } | 65 } |
64 | 66 |
65 const MultiColumnFragmentainerGroup& LayoutMultiColumnSet::fragmentainerGroupAtV isualPoint(const LayoutPoint&) const | 67 const MultiColumnFragmentainerGroup& LayoutMultiColumnSet::fragmentainerGroupAtV isualPoint(const LayoutPoint&) const |
66 { | 68 { |
67 // FIXME: implement this, once we have support for multiple rows. | 69 // FIXME: implement this, once we have support for multiple rows. |
68 return m_fragmentainerGroups.first(); | 70 return m_fragmentainerGroups.first(); |
69 } | 71 } |
70 | 72 |
71 LayoutUnit LayoutMultiColumnSet::pageLogicalHeightForOffset(LayoutUnit offsetInF lowThread) const | 73 LayoutUnit LayoutMultiColumnSet::pageLogicalHeightForOffset(LayoutUnit offsetInF lowThread) const |
72 { | 74 { |
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106 | 108 |
107 LayoutMultiColumnSet* LayoutMultiColumnSet::previousSiblingMultiColumnSet() cons t | 109 LayoutMultiColumnSet* LayoutMultiColumnSet::previousSiblingMultiColumnSet() cons t |
108 { | 110 { |
109 for (LayoutObject* sibling = previousSibling(); sibling; sibling = sibling-> previousSibling()) { | 111 for (LayoutObject* sibling = previousSibling(); sibling; sibling = sibling-> previousSibling()) { |
110 if (sibling->isLayoutMultiColumnSet()) | 112 if (sibling->isLayoutMultiColumnSet()) |
111 return toLayoutMultiColumnSet(sibling); | 113 return toLayoutMultiColumnSet(sibling); |
112 } | 114 } |
113 return nullptr; | 115 return nullptr; |
114 } | 116 } |
115 | 117 |
118 MultiColumnFragmentainerGroup& LayoutMultiColumnSet::appendNewFragmentainerGroup () | |
119 { | |
120 MultiColumnFragmentainerGroup newGroup(*this); | |
121 { // extra scope here for previousGroup; it's potentially invalid once we mo dify the m_fragmentainerGroups Vector. | |
leviw_travelin_and_unemployed
2015/08/15 00:04:43
Nit: capitalize extra.
mstensho (USE GERRIT)
2015/08/17 07:43:09
done
| |
122 MultiColumnFragmentainerGroup& previousGroup = m_fragmentainerGroups.las t(); | |
123 | |
124 // This is the flow thread block offset where |previousGroup| ends and | newGroup| takes over. | |
125 LayoutUnit blockOffsetInFlowThread = previousGroup.logicalTopInFlowThrea d() + previousGroup.logicalHeight() * usedColumnCount(); | |
126 previousGroup.setLogicalBottomInFlowThread(blockOffsetInFlowThread); | |
127 newGroup.setLogicalTopInFlowThread(blockOffsetInFlowThread); | |
128 | |
129 newGroup.setLogicalTop(previousGroup.logicalTop() + previousGroup.logica lHeight()); | |
130 newGroup.resetColumnHeight(); | |
131 } | |
132 m_fragmentainerGroups.append(newGroup); | |
133 return m_fragmentainerGroups.last(); | |
134 } | |
135 | |
116 LayoutUnit LayoutMultiColumnSet::logicalTopInFlowThread() const | 136 LayoutUnit LayoutMultiColumnSet::logicalTopInFlowThread() const |
117 { | 137 { |
118 return firstFragmentainerGroup().logicalTopInFlowThread(); | 138 return firstFragmentainerGroup().logicalTopInFlowThread(); |
119 } | 139 } |
120 | 140 |
121 LayoutUnit LayoutMultiColumnSet::logicalBottomInFlowThread() const | 141 LayoutUnit LayoutMultiColumnSet::logicalBottomInFlowThread() const |
122 { | 142 { |
123 return lastFragmentainerGroup().logicalBottomInFlowThread(); | 143 return lastFragmentainerGroup().logicalBottomInFlowThread(); |
124 } | 144 } |
125 | 145 |
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209 bool LayoutMultiColumnSet::recalculateColumnHeight(BalancedColumnHeightCalculati on calculationMode) | 229 bool LayoutMultiColumnSet::recalculateColumnHeight(BalancedColumnHeightCalculati on calculationMode) |
210 { | 230 { |
211 bool changed = false; | 231 bool changed = false; |
212 for (auto& group : m_fragmentainerGroups) | 232 for (auto& group : m_fragmentainerGroups) |
213 changed = group.recalculateColumnHeight(calculationMode) || changed; | 233 changed = group.recalculateColumnHeight(calculationMode) || changed; |
214 return changed; | 234 return changed; |
215 } | 235 } |
216 | 236 |
217 void LayoutMultiColumnSet::recordSpaceShortage(LayoutUnit offsetInFlowThread, La youtUnit spaceShortage) | 237 void LayoutMultiColumnSet::recordSpaceShortage(LayoutUnit offsetInFlowThread, La youtUnit spaceShortage) |
218 { | 238 { |
219 fragmentainerGroupAtFlowThreadOffset(offsetInFlowThread).recordSpaceShortage (spaceShortage); | 239 MultiColumnFragmentainerGroup& row = fragmentainerGroupAtFlowThreadOffset(of fsetInFlowThread); |
240 row.recordSpaceShortage(spaceShortage); | |
241 | |
242 // Since we're at a potential break here, take the opportunity to check if w e need another | |
243 // fragmentainer group. If we've run out of columns in the last fragmentaine r group (column | |
244 // row), we need to insert another fragmentainer group to hold more columns. | |
245 if (!row.isLastGroup()) | |
246 return; | |
247 LayoutMultiColumnFlowThread* flowThread = multiColumnFlowThread(); | |
248 if (!flowThread->multiColumnBlockFlow()->isInsideFlowThread()) | |
249 return; // Early bail. We're not nested, so waste no more time on this. | |
250 if (!flowThread->isInInitialLayoutPass()) | |
251 return; | |
252 // Move the offset to where the next column starts, if we're not there alrea dy. | |
253 offsetInFlowThread += flowThread->pageRemainingLogicalHeightForOffset(offset InFlowThread, AssociateWithFormerPage); | |
254 | |
255 flowThread->appendNewFragmentainerGroupIfNeeded(offsetInFlowThread); | |
220 } | 256 } |
221 | 257 |
222 void LayoutMultiColumnSet::resetColumnHeight() | 258 void LayoutMultiColumnSet::resetColumnHeight() |
223 { | 259 { |
224 m_fragmentainerGroups.deleteExtraGroups(); | 260 m_fragmentainerGroups.deleteExtraGroups(); |
225 m_fragmentainerGroups.first().resetColumnHeight(); | 261 m_fragmentainerGroups.first().resetColumnHeight(); |
226 } | 262 } |
227 | 263 |
228 void LayoutMultiColumnSet::beginFlow(LayoutUnit offsetInFlowThread) | 264 void LayoutMultiColumnSet::beginFlow(LayoutUnit offsetInFlowThread) |
229 { | 265 { |
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345 | 381 |
346 LayoutRect LayoutMultiColumnSet::flowThreadPortionRect() const | 382 LayoutRect LayoutMultiColumnSet::flowThreadPortionRect() const |
347 { | 383 { |
348 LayoutRect portionRect(LayoutUnit(), logicalTopInFlowThread(), pageLogicalWi dth(), logicalHeightInFlowThread()); | 384 LayoutRect portionRect(LayoutUnit(), logicalTopInFlowThread(), pageLogicalWi dth(), logicalHeightInFlowThread()); |
349 if (!isHorizontalWritingMode()) | 385 if (!isHorizontalWritingMode()) |
350 return portionRect.transposedRect(); | 386 return portionRect.transposedRect(); |
351 return portionRect; | 387 return portionRect; |
352 } | 388 } |
353 | 389 |
354 } | 390 } |
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