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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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2586 2586
2587 LayoutUnit LayoutBlock::nextPageLogicalTop(LayoutUnit logicalOffset, PageBoundar yRule pageBoundaryRule) const 2587 LayoutUnit LayoutBlock::nextPageLogicalTop(LayoutUnit logicalOffset, PageBoundar yRule pageBoundaryRule) const
2588 { 2588 {
2589 LayoutUnit pageLogicalHeight = pageLogicalHeightForOffset(logicalOffset); 2589 LayoutUnit pageLogicalHeight = pageLogicalHeightForOffset(logicalOffset);
2590 if (!pageLogicalHeight) 2590 if (!pageLogicalHeight)
2591 return logicalOffset; 2591 return logicalOffset;
2592 2592
2593 return logicalOffset + pageRemainingLogicalHeightForOffset(logicalOffset, pa geBoundaryRule); 2593 return logicalOffset + pageRemainingLogicalHeightForOffset(logicalOffset, pa geBoundaryRule);
2594 } 2594 }
2595 2595
2596 LayoutUnit LayoutBlock::pageLogicalHeightForOffset(LayoutUnit offset) const
2597 {
2598 LayoutView* layoutView = view();
2599 LayoutFlowThread* flowThread = flowThreadContainingBlock();
2600 if (!flowThread)
2601 return layoutView->layoutState()->pageLogicalHeight();
2602 return flowThread->pageLogicalHeightForOffset(offset + offsetFromLogicalTopO fFirstPage());
2603 }
2604
2605 LayoutUnit LayoutBlock::pageRemainingLogicalHeightForOffset(LayoutUnit offset, P ageBoundaryRule pageBoundaryRule) const
2606 {
2607 LayoutView* layoutView = view();
2608 offset += offsetFromLogicalTopOfFirstPage();
2609
2610 LayoutFlowThread* flowThread = flowThreadContainingBlock();
2611 if (!flowThread) {
2612 LayoutUnit pageLogicalHeight = layoutView->layoutState()->pageLogicalHei ght();
2613 LayoutUnit remainingHeight = pageLogicalHeight - intMod(offset, pageLogi calHeight);
2614 if (pageBoundaryRule == AssociateWithFormerPage) {
2615 // An offset exactly at a page boundary will act as being part of th e former page in
2616 // question (i.e. no remaining space), rather than being part of the latter (i.e. one
2617 // whole page length of remaining space).
2618 remainingHeight = intMod(remainingHeight, pageLogicalHeight);
2619 }
2620 return remainingHeight;
2621 }
2622
2623 return flowThread->pageRemainingLogicalHeightForOffset(offset, pageBoundaryR ule);
2624 }
2625
2626 LayoutUnit LayoutBlock::calculatePaginationStrutToFitContent(LayoutUnit offset, LayoutUnit strutToNextPage, LayoutUnit contentLogicalHeight) const
2627 {
2628 ASSERT(strutToNextPage == pageRemainingLogicalHeightForOffset(offset, Associ ateWithLatterPage));
2629 LayoutUnit nextPageLogicalTop = offset + strutToNextPage;
2630 if (pageLogicalHeightForOffset(nextPageLogicalTop) >= contentLogicalHeight)
2631 return strutToNextPage; // Content fits just fine in the next page or co lumn.
2632
2633 // Moving to the top of the next page or column doesn't result in enough spa ce for the content
2634 // that we're trying to fit. If we're in a nested fragmentation context, we may find enough
2635 // space if we move to a column further ahead, by effectively breaking to th e next outer
2636 // fragmentainer.
2637 LayoutFlowThread* flowThread = flowThreadContainingBlock();
2638 if (!flowThread) {
2639 // If there's no flow thread, we're not nested. All pages have the same height. Give up.
2640 return strutToNextPage;
2641 }
2642 // Start searching for a suitable offset at the top of the next page or colu mn.
2643 LayoutUnit flowThreadOffset = offsetFromLogicalTopOfFirstPage() + nextPageLo gicalTop;
2644 return strutToNextPage + flowThread->nextLogicalTopForUnbreakableContent(flo wThreadOffset, contentLogicalHeight) - flowThreadOffset;
2645 }
2646
2647 void LayoutBlock::paginatedContentWasLaidOut(LayoutUnit logicalBottomOffsetAfter Pagination) 2596 void LayoutBlock::paginatedContentWasLaidOut(LayoutUnit logicalBottomOffsetAfter Pagination)
2648 { 2597 {
2649 if (LayoutFlowThread* flowThread = flowThreadContainingBlock()) 2598 if (LayoutFlowThread* flowThread = flowThreadContainingBlock())
2650 flowThread->contentWasLaidOut(offsetFromLogicalTopOfFirstPage() + logica lBottomOffsetAfterPagination); 2599 flowThread->contentWasLaidOut(offsetFromLogicalTopOfFirstPage() + logica lBottomOffsetAfterPagination);
2651 } 2600 }
2652 2601
2653 LayoutUnit LayoutBlock::collapsedMarginBeforeForChild(const LayoutBox& child) co nst 2602 LayoutUnit LayoutBlock::collapsedMarginBeforeForChild(const LayoutBox& child) co nst
2654 { 2603 {
2655 // If the child has the same directionality as we do, then we can just retur n its 2604 // If the child has the same directionality as we do, then we can just retur n its
2656 // collapsed margin. 2605 // collapsed margin.
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2867 void LayoutBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* m arkedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const Layout Object* obj) const 2816 void LayoutBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* m arkedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const Layout Object* obj) const
2868 { 2817 {
2869 showLayoutObject(); 2818 showLayoutObject();
2870 for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRoot Box()) 2819 for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRoot Box())
2871 root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLa bel2, obj, 1); 2820 root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLa bel2, obj, 1);
2872 } 2821 }
2873 2822
2874 #endif 2823 #endif
2875 2824
2876 } // namespace blink 2825 } // namespace blink
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