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Side by Side Diff: third_party/WebKit/Source/core/layout/LayoutBlock.cpp

Issue 1602773005: Respect break-inside:avoid on table rows (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Updated Created 4 years, 9 months ago
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1 /* 1 /*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org) 2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 * (C) 1999 Antti Koivisto (koivisto@kde.org) 3 * (C) 1999 Antti Koivisto (koivisto@kde.org)
4 * (C) 2007 David Smith (catfish.man@gmail.com) 4 * (C) 2007 David Smith (catfish.man@gmail.com)
5 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved. 5 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
6 * Copyright (C) Research In Motion Limited 2010. All rights reserved. 6 * Copyright (C) Research In Motion Limited 2010. All rights reserved.
7 * 7 *
8 * This library is free software; you can redistribute it and/or 8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public 9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either 10 * License as published by the Free Software Foundation; either
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2574 2574
2575 LayoutUnit LayoutBlock::nextPageLogicalTop(LayoutUnit logicalOffset, PageBoundar yRule pageBoundaryRule) const 2575 LayoutUnit LayoutBlock::nextPageLogicalTop(LayoutUnit logicalOffset, PageBoundar yRule pageBoundaryRule) const
2576 { 2576 {
2577 LayoutUnit pageLogicalHeight = pageLogicalHeightForOffset(logicalOffset); 2577 LayoutUnit pageLogicalHeight = pageLogicalHeightForOffset(logicalOffset);
2578 if (!pageLogicalHeight) 2578 if (!pageLogicalHeight)
2579 return logicalOffset; 2579 return logicalOffset;
2580 2580
2581 return logicalOffset + pageRemainingLogicalHeightForOffset(logicalOffset, pa geBoundaryRule); 2581 return logicalOffset + pageRemainingLogicalHeightForOffset(logicalOffset, pa geBoundaryRule);
2582 } 2582 }
2583 2583
2584 LayoutUnit LayoutBlock::pageLogicalHeightForOffset(LayoutUnit offset) const
2585 {
2586 LayoutView* layoutView = view();
2587 LayoutFlowThread* flowThread = flowThreadContainingBlock();
2588 if (!flowThread)
2589 return layoutView->layoutState()->pageLogicalHeight();
2590 return flowThread->pageLogicalHeightForOffset(offset + offsetFromLogicalTopO fFirstPage());
2591 }
2592
2593 LayoutUnit LayoutBlock::pageRemainingLogicalHeightForOffset(LayoutUnit offset, P ageBoundaryRule pageBoundaryRule) const
2594 {
2595 LayoutView* layoutView = view();
2596 offset += offsetFromLogicalTopOfFirstPage();
2597
2598 LayoutFlowThread* flowThread = flowThreadContainingBlock();
2599 if (!flowThread) {
2600 LayoutUnit pageLogicalHeight = layoutView->layoutState()->pageLogicalHei ght();
2601 LayoutUnit remainingHeight = pageLogicalHeight - intMod(offset, pageLogi calHeight);
2602 if (pageBoundaryRule == AssociateWithFormerPage) {
2603 // An offset exactly at a page boundary will act as being part of th e former page in
2604 // question (i.e. no remaining space), rather than being part of the latter (i.e. one
2605 // whole page length of remaining space).
2606 remainingHeight = intMod(remainingHeight, pageLogicalHeight);
2607 }
2608 return remainingHeight;
2609 }
2610
2611 return flowThread->pageRemainingLogicalHeightForOffset(offset, pageBoundaryR ule);
2612 }
2613
2614 LayoutUnit LayoutBlock::calculatePaginationStrutToFitContent(LayoutUnit offset, LayoutUnit strutToNextPage, LayoutUnit contentLogicalHeight) const
2615 {
2616 ASSERT(strutToNextPage == pageRemainingLogicalHeightForOffset(offset, Associ ateWithLatterPage));
2617 LayoutUnit nextPageLogicalTop = offset + strutToNextPage;
2618 if (pageLogicalHeightForOffset(nextPageLogicalTop) >= contentLogicalHeight)
2619 return strutToNextPage; // Content fits just fine in the next page or co lumn.
2620
2621 // Moving to the top of the next page or column doesn't result in enough spa ce for the content
2622 // that we're trying to fit. If we're in a nested fragmentation context, we may find enough
2623 // space if we move to a column further ahead, by effectively breaking to th e next outer
2624 // fragmentainer.
2625 LayoutFlowThread* flowThread = flowThreadContainingBlock();
2626 if (!flowThread) {
2627 // If there's no flow thread, we're not nested. All pages have the same height. Give up.
2628 return strutToNextPage;
2629 }
2630 // Start searching for a suitable offset at the top of the next page or colu mn.
2631 LayoutUnit flowThreadOffset = offsetFromLogicalTopOfFirstPage() + nextPageLo gicalTop;
2632 return strutToNextPage + flowThread->nextLogicalTopForUnbreakableContent(flo wThreadOffset, contentLogicalHeight) - flowThreadOffset;
2633 }
2634
2635 void LayoutBlock::paginatedContentWasLaidOut(LayoutUnit logicalBottomOffsetAfter Pagination) 2584 void LayoutBlock::paginatedContentWasLaidOut(LayoutUnit logicalBottomOffsetAfter Pagination)
2636 { 2585 {
2637 if (LayoutFlowThread* flowThread = flowThreadContainingBlock()) 2586 if (LayoutFlowThread* flowThread = flowThreadContainingBlock())
2638 flowThread->contentWasLaidOut(offsetFromLogicalTopOfFirstPage() + logica lBottomOffsetAfterPagination); 2587 flowThread->contentWasLaidOut(offsetFromLogicalTopOfFirstPage() + logica lBottomOffsetAfterPagination);
2639 } 2588 }
2640 2589
2641 LayoutUnit LayoutBlock::collapsedMarginBeforeForChild(const LayoutBox& child) co nst 2590 LayoutUnit LayoutBlock::collapsedMarginBeforeForChild(const LayoutBox& child) co nst
2642 { 2591 {
2643 // If the child has the same directionality as we do, then we can just retur n its 2592 // If the child has the same directionality as we do, then we can just retur n its
2644 // collapsed margin. 2593 // collapsed margin.
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2855 void LayoutBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* m arkedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const Layout Object* obj) const 2804 void LayoutBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* m arkedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const Layout Object* obj) const
2856 { 2805 {
2857 showLayoutObject(); 2806 showLayoutObject();
2858 for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRoot Box()) 2807 for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRoot Box())
2859 root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLa bel2, obj, 1); 2808 root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLa bel2, obj, 1);
2860 } 2809 }
2861 2810
2862 #endif 2811 #endif
2863 2812
2864 } // namespace blink 2813 } // namespace blink
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