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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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591 ->setNeedsLayoutAndPrefWidthsRecalc( | 591 ->setNeedsLayoutAndPrefWidthsRecalc( |
592 LayoutInvalidationReason::ColumnsChanged); | 592 LayoutInvalidationReason::ColumnsChanged); |
593 | 593 |
594 // Now generate a column set for this ex-spanner, if needed and none is there | 594 // Now generate a column set for this ex-spanner, if needed and none is there |
595 // for us already. | 595 // for us already. |
596 flowThreadDescendantWasInserted(spannerObjectInFlowThread); | 596 flowThreadDescendantWasInserted(spannerObjectInFlowThread); |
597 | 597 |
598 return true; | 598 return true; |
599 } | 599 } |
600 | 600 |
601 LayoutMultiColumnFlowThread* LayoutMultiColumnFlowThread::enclosingFlowThread() | 601 LayoutMultiColumnFlowThread* LayoutMultiColumnFlowThread::enclosingFlowThread( |
602 const { | 602 AncestorSearchConstraint constraint) const { |
603 if (isLayoutPagedFlowThread()) { | 603 if (isLayoutPagedFlowThread()) { |
604 // Paged overflow containers should never be fragmented by enclosing | 604 // Paged overflow containers should never be fragmented by enclosing |
605 // fragmentation contexts. They are to be treated as unbreakable content. | 605 // fragmentation contexts. They are to be treated as unbreakable content. |
606 return nullptr; | 606 return nullptr; |
607 } | 607 } |
608 if (multiColumnBlockFlow()->isInsideFlowThread()) | 608 if (!multiColumnBlockFlow()->isInsideFlowThread()) |
609 return toLayoutMultiColumnFlowThread( | 609 return nullptr; |
610 locateFlowThreadContainingBlockOf(*multiColumnBlockFlow())); | 610 return toLayoutMultiColumnFlowThread( |
611 return nullptr; | 611 locateFlowThreadContainingBlockOf(*multiColumnBlockFlow(), constraint)); |
612 } | 612 } |
613 | 613 |
614 FragmentationContext* | 614 FragmentationContext* |
615 LayoutMultiColumnFlowThread::enclosingFragmentationContext( | 615 LayoutMultiColumnFlowThread::enclosingFragmentationContext( |
616 AncestorSearchConstraint constraint) const { | 616 AncestorSearchConstraint constraint) const { |
617 // If this multicol container is strictly unbreakable (due to having | 617 // If this multicol container is strictly unbreakable (due to having |
618 // scrollbars, for instance), it's also strictly unbreakable in any outer | 618 // scrollbars, for instance), it's also strictly unbreakable in any outer |
619 // fragmentation context. As such, what kind of fragmentation that goes on | 619 // fragmentation context. As such, what kind of fragmentation that goes on |
620 // inside this multicol container is completely opaque to the ancestors. | 620 // inside this multicol container is completely opaque to the ancestors. |
621 if (constraint == IsolateUnbreakableContainers && | 621 if (constraint == IsolateUnbreakableContainers && |
622 multiColumnBlockFlow()->getPaginationBreakability() == ForbidBreaks) | 622 multiColumnBlockFlow()->getPaginationBreakability() == ForbidBreaks) |
623 return nullptr; | 623 return nullptr; |
624 if (auto* enclosingFlowThread = this->enclosingFlowThread()) | 624 if (auto* enclosingFlowThread = this->enclosingFlowThread(constraint)) |
625 return enclosingFlowThread; | 625 return enclosingFlowThread; |
626 return view()->fragmentationContext(); | 626 return view()->fragmentationContext(); |
627 } | 627 } |
628 | 628 |
629 void LayoutMultiColumnFlowThread::appendNewFragmentainerGroupIfNeeded( | 629 void LayoutMultiColumnFlowThread::appendNewFragmentainerGroupIfNeeded( |
630 LayoutUnit offsetInFlowThread, | 630 LayoutUnit offsetInFlowThread, |
631 PageBoundaryRule pageBoundaryRule) { | 631 PageBoundaryRule pageBoundaryRule) { |
632 LayoutMultiColumnSet* columnSet = | 632 LayoutMultiColumnSet* columnSet = |
633 columnSetAtBlockOffset(offsetInFlowThread, pageBoundaryRule); | 633 columnSetAtBlockOffset(offsetInFlowThread, pageBoundaryRule); |
634 if (!columnSet->newFragmentainerGroupsAllowed()) | 634 if (!columnSet->newFragmentainerGroupsAllowed()) |
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1376 const { | 1376 const { |
1377 return MultiColumnLayoutState(m_lastSetWorkedOn); | 1377 return MultiColumnLayoutState(m_lastSetWorkedOn); |
1378 } | 1378 } |
1379 | 1379 |
1380 void LayoutMultiColumnFlowThread::restoreMultiColumnLayoutState( | 1380 void LayoutMultiColumnFlowThread::restoreMultiColumnLayoutState( |
1381 const MultiColumnLayoutState& state) { | 1381 const MultiColumnLayoutState& state) { |
1382 m_lastSetWorkedOn = state.columnSet(); | 1382 m_lastSetWorkedOn = state.columnSet(); |
1383 } | 1383 } |
1384 | 1384 |
1385 } // namespace blink | 1385 } // namespace blink |
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