68 lines
3.3 KiB
C++
68 lines
3.3 KiB
C++
/*
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* Copyright (C) 2012 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "RenderFragmentContainerSet.h"
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#include "RenderBoxFragmentInfo.h"
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#include "RenderFragmentedFlow.h"
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#include <wtf/IsoMallocInlines.h>
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namespace WebCore {
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WTF_MAKE_ISO_ALLOCATED_IMPL(RenderFragmentContainerSet);
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RenderFragmentContainerSet::RenderFragmentContainerSet(Document& document, RenderStyle&& style, RenderFragmentedFlow& fragmentedFlow)
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: RenderFragmentContainer(document, WTFMove(style), &fragmentedFlow)
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{
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}
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void RenderFragmentContainerSet::installFragmentedFlow()
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{
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// We don't have to do anything, since we were able to connect the flow thread
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// in the constructor.
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}
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void RenderFragmentContainerSet::expandToEncompassFragmentedFlowContentsIfNeeded()
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{
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// Whenever the last region is a set, it always expands its region rect to consume all
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// of the flow thread content. This is because it is always capable of generating an
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// infinite number of boxes in order to hold all of the remaining content.
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auto rect = fragmentedFlowPortionRect();
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// Get the offset within the flow thread in its block progression direction. Then get the
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// flow thread's remaining logical height including its overflow and expand our rect
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// to encompass that remaining height and overflow. The idea is that we will generate
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// additional columns and pages to hold that overflow, since people do write bad
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// content like <body style="height:0px"> in multi-column layouts.
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bool isHorizontal = fragmentedFlow()->isHorizontalWritingMode();
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auto logicalTopOffset = isHorizontal ? rect.y() : rect.x();
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auto overflowHeight = isHorizontal ? fragmentedFlow()->layoutOverflowRect().maxY() : fragmentedFlow()->layoutOverflowRect().maxX();
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auto logicalHeightWithOverflow = logicalTopOffset == RenderFragmentedFlow::maxLogicalHeight() ? overflowHeight : overflowHeight - logicalTopOffset;
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setFragmentedFlowPortionRect({ rect.x(), rect.y(), isHorizontal ? rect.width() : logicalHeightWithOverflow, isHorizontal ? logicalHeightWithOverflow : rect.height() });
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}
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}
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