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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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2561 | 2561 |
2562 LayoutUnit LayoutBlock::nextPageLogicalTop(LayoutUnit logicalOffset, PageBoundar
yRule pageBoundaryRule) const | 2562 LayoutUnit LayoutBlock::nextPageLogicalTop(LayoutUnit logicalOffset, PageBoundar
yRule pageBoundaryRule) const |
2563 { | 2563 { |
2564 LayoutUnit pageLogicalHeight = pageLogicalHeightForOffset(logicalOffset); | 2564 LayoutUnit pageLogicalHeight = pageLogicalHeightForOffset(logicalOffset); |
2565 if (!pageLogicalHeight) | 2565 if (!pageLogicalHeight) |
2566 return logicalOffset; | 2566 return logicalOffset; |
2567 | 2567 |
2568 return logicalOffset + pageRemainingLogicalHeightForOffset(logicalOffset, pa
geBoundaryRule); | 2568 return logicalOffset + pageRemainingLogicalHeightForOffset(logicalOffset, pa
geBoundaryRule); |
2569 } | 2569 } |
2570 | 2570 |
2571 LayoutUnit LayoutBlock::pageLogicalHeightForOffset(LayoutUnit offset) const | |
2572 { | |
2573 LayoutView* layoutView = view(); | |
2574 LayoutFlowThread* flowThread = flowThreadContainingBlock(); | |
2575 if (!flowThread) | |
2576 return layoutView->layoutState()->pageLogicalHeight(); | |
2577 return flowThread->pageLogicalHeightForOffset(offset + offsetFromLogicalTopO
fFirstPage()); | |
2578 } | |
2579 | |
2580 LayoutUnit LayoutBlock::pageRemainingLogicalHeightForOffset(LayoutUnit offset, P
ageBoundaryRule pageBoundaryRule) const | |
2581 { | |
2582 LayoutView* layoutView = view(); | |
2583 offset += offsetFromLogicalTopOfFirstPage(); | |
2584 | |
2585 LayoutFlowThread* flowThread = flowThreadContainingBlock(); | |
2586 if (!flowThread) { | |
2587 LayoutUnit pageLogicalHeight = layoutView->layoutState()->pageLogicalHei
ght(); | |
2588 LayoutUnit remainingHeight = pageLogicalHeight - intMod(offset, pageLogi
calHeight); | |
2589 if (pageBoundaryRule == AssociateWithFormerPage) { | |
2590 // An offset exactly at a page boundary will act as being part of th
e former page in | |
2591 // question (i.e. no remaining space), rather than being part of the
latter (i.e. one | |
2592 // whole page length of remaining space). | |
2593 remainingHeight = intMod(remainingHeight, pageLogicalHeight); | |
2594 } | |
2595 return remainingHeight; | |
2596 } | |
2597 | |
2598 return flowThread->pageRemainingLogicalHeightForOffset(offset, pageBoundaryR
ule); | |
2599 } | |
2600 | |
2601 LayoutUnit LayoutBlock::calculatePaginationStrutToFitContent(LayoutUnit offset,
LayoutUnit strutToNextPage, LayoutUnit contentLogicalHeight) const | |
2602 { | |
2603 ASSERT(strutToNextPage == pageRemainingLogicalHeightForOffset(offset, Associ
ateWithLatterPage)); | |
2604 LayoutUnit nextPageLogicalTop = offset + strutToNextPage; | |
2605 if (pageLogicalHeightForOffset(nextPageLogicalTop) >= contentLogicalHeight) | |
2606 return strutToNextPage; // Content fits just fine in the next page or co
lumn. | |
2607 | |
2608 // Moving to the top of the next page or column doesn't result in enough spa
ce for the content | |
2609 // that we're trying to fit. If we're in a nested fragmentation context, we
may find enough | |
2610 // space if we move to a column further ahead, by effectively breaking to th
e next outer | |
2611 // fragmentainer. | |
2612 LayoutFlowThread* flowThread = flowThreadContainingBlock(); | |
2613 if (!flowThread) { | |
2614 // If there's no flow thread, we're not nested. All pages have the same
height. Give up. | |
2615 return strutToNextPage; | |
2616 } | |
2617 // Start searching for a suitable offset at the top of the next page or colu
mn. | |
2618 LayoutUnit flowThreadOffset = offsetFromLogicalTopOfFirstPage() + nextPageLo
gicalTop; | |
2619 return strutToNextPage + flowThread->nextLogicalTopForUnbreakableContent(flo
wThreadOffset, contentLogicalHeight) - flowThreadOffset; | |
2620 } | |
2621 | |
2622 void LayoutBlock::paginatedContentWasLaidOut(LayoutUnit logicalBottomOffsetAfter
Pagination) | 2571 void LayoutBlock::paginatedContentWasLaidOut(LayoutUnit logicalBottomOffsetAfter
Pagination) |
2623 { | 2572 { |
2624 if (LayoutFlowThread* flowThread = flowThreadContainingBlock()) | 2573 if (LayoutFlowThread* flowThread = flowThreadContainingBlock()) |
2625 flowThread->contentWasLaidOut(offsetFromLogicalTopOfFirstPage() + logica
lBottomOffsetAfterPagination); | 2574 flowThread->contentWasLaidOut(offsetFromLogicalTopOfFirstPage() + logica
lBottomOffsetAfterPagination); |
2626 } | 2575 } |
2627 | 2576 |
2628 LayoutUnit LayoutBlock::collapsedMarginBeforeForChild(const LayoutBox& child) co
nst | 2577 LayoutUnit LayoutBlock::collapsedMarginBeforeForChild(const LayoutBox& child) co
nst |
2629 { | 2578 { |
2630 // If the child has the same directionality as we do, then we can just retur
n its | 2579 // If the child has the same directionality as we do, then we can just retur
n its |
2631 // collapsed margin. | 2580 // collapsed margin. |
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2842 void LayoutBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* m
arkedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const Layout
Object* obj) const | 2791 void LayoutBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* m
arkedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const Layout
Object* obj) const |
2843 { | 2792 { |
2844 showLayoutObject(); | 2793 showLayoutObject(); |
2845 for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRoot
Box()) | 2794 for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRoot
Box()) |
2846 root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLa
bel2, obj, 1); | 2795 root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLa
bel2, obj, 1); |
2847 } | 2796 } |
2848 | 2797 |
2849 #endif | 2798 #endif |
2850 | 2799 |
2851 } // namespace blink | 2800 } // namespace blink |
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