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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, 7 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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2478 2478
2479 LayoutUnit LayoutBlock::nextPageLogicalTop(LayoutUnit logicalOffset, PageBoundar yRule pageBoundaryRule) const 2479 LayoutUnit LayoutBlock::nextPageLogicalTop(LayoutUnit logicalOffset, PageBoundar yRule pageBoundaryRule) const
2480 { 2480 {
2481 LayoutUnit pageLogicalHeight = pageLogicalHeightForOffset(logicalOffset); 2481 LayoutUnit pageLogicalHeight = pageLogicalHeightForOffset(logicalOffset);
2482 if (!pageLogicalHeight) 2482 if (!pageLogicalHeight)
2483 return logicalOffset; 2483 return logicalOffset;
2484 2484
2485 return logicalOffset + pageRemainingLogicalHeightForOffset(logicalOffset, pa geBoundaryRule); 2485 return logicalOffset + pageRemainingLogicalHeightForOffset(logicalOffset, pa geBoundaryRule);
2486 } 2486 }
2487 2487
2488 LayoutUnit LayoutBlock::pageLogicalHeightForOffset(LayoutUnit offset) const
2489 {
2490 LayoutView* layoutView = view();
2491 LayoutFlowThread* flowThread = flowThreadContainingBlock();
2492 if (!flowThread)
2493 return layoutView->layoutState()->pageLogicalHeight();
2494 return flowThread->pageLogicalHeightForOffset(offset + offsetFromLogicalTopO fFirstPage());
2495 }
2496
2497 LayoutUnit LayoutBlock::pageRemainingLogicalHeightForOffset(LayoutUnit offset, P ageBoundaryRule pageBoundaryRule) const
2498 {
2499 LayoutView* layoutView = view();
2500 offset += offsetFromLogicalTopOfFirstPage();
2501
2502 LayoutFlowThread* flowThread = flowThreadContainingBlock();
2503 if (!flowThread) {
2504 LayoutUnit pageLogicalHeight = layoutView->layoutState()->pageLogicalHei ght();
2505 LayoutUnit remainingHeight = pageLogicalHeight - intMod(offset, pageLogi calHeight);
2506 if (pageBoundaryRule == AssociateWithFormerPage) {
2507 // An offset exactly at a page boundary will act as being part of th e former page in
2508 // question (i.e. no remaining space), rather than being part of the latter (i.e. one
2509 // whole page length of remaining space).
2510 remainingHeight = intMod(remainingHeight, pageLogicalHeight);
2511 }
2512 return remainingHeight;
2513 }
2514
2515 return flowThread->pageRemainingLogicalHeightForOffset(offset, pageBoundaryR ule);
2516 }
2517
2518 LayoutUnit LayoutBlock::calculatePaginationStrutToFitContent(LayoutUnit offset, LayoutUnit strutToNextPage, LayoutUnit contentLogicalHeight) const
2519 {
2520 ASSERT(strutToNextPage == pageRemainingLogicalHeightForOffset(offset, Associ ateWithLatterPage));
2521 LayoutUnit nextPageLogicalTop = offset + strutToNextPage;
2522 if (pageLogicalHeightForOffset(nextPageLogicalTop) >= contentLogicalHeight)
2523 return strutToNextPage; // Content fits just fine in the next page or co lumn.
2524
2525 // Moving to the top of the next page or column doesn't result in enough spa ce for the content
2526 // that we're trying to fit. If we're in a nested fragmentation context, we may find enough
2527 // space if we move to a column further ahead, by effectively breaking to th e next outer
2528 // fragmentainer.
2529 LayoutFlowThread* flowThread = flowThreadContainingBlock();
2530 if (!flowThread) {
2531 // If there's no flow thread, we're not nested. All pages have the same height. Give up.
2532 return strutToNextPage;
2533 }
2534 // Start searching for a suitable offset at the top of the next page or colu mn.
2535 LayoutUnit flowThreadOffset = offsetFromLogicalTopOfFirstPage() + nextPageLo gicalTop;
2536 return strutToNextPage + flowThread->nextLogicalTopForUnbreakableContent(flo wThreadOffset, contentLogicalHeight) - flowThreadOffset;
2537 }
2538
2539 void LayoutBlock::paginatedContentWasLaidOut(LayoutUnit logicalBottomOffsetAfter Pagination) 2488 void LayoutBlock::paginatedContentWasLaidOut(LayoutUnit logicalBottomOffsetAfter Pagination)
2540 { 2489 {
2541 if (LayoutFlowThread* flowThread = flowThreadContainingBlock()) 2490 if (LayoutFlowThread* flowThread = flowThreadContainingBlock())
2542 flowThread->contentWasLaidOut(offsetFromLogicalTopOfFirstPage() + logica lBottomOffsetAfterPagination); 2491 flowThread->contentWasLaidOut(offsetFromLogicalTopOfFirstPage() + logica lBottomOffsetAfterPagination);
2543 } 2492 }
2544 2493
2545 LayoutUnit LayoutBlock::collapsedMarginBeforeForChild(const LayoutBox& child) co nst 2494 LayoutUnit LayoutBlock::collapsedMarginBeforeForChild(const LayoutBox& child) co nst
2546 { 2495 {
2547 // If the child has the same directionality as we do, then we can just retur n its 2496 // If the child has the same directionality as we do, then we can just retur n its
2548 // collapsed margin. 2497 // collapsed margin.
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2759 void LayoutBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* m arkedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const Layout Object* obj) const 2708 void LayoutBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* m arkedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const Layout Object* obj) const
2760 { 2709 {
2761 showLayoutObject(); 2710 showLayoutObject();
2762 for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRoot Box()) 2711 for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRoot Box())
2763 root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLa bel2, obj, 1); 2712 root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLa bel2, obj, 1);
2764 } 2713 }
2765 2714
2766 #endif 2715 #endif
2767 2716
2768 } // namespace blink 2717 } // namespace blink
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