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