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/*
* Copyright (C) 2010 Alex Milowski (alex@milowski.com). 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT
* OWNER 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 "RenderMathMLMath.h"
#if ENABLE(MATHML)
#include "MathMLNames.h"
#include "MathMLRowElement.h"
#include "RenderBoxInlines.h"
#include "RenderBoxModelObjectInlines.h"
#include "RenderStyleInlines.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
using namespace MathMLNames;
WTF_MAKE_ISO_ALLOCATED_IMPL(RenderMathMLMath);
RenderMathMLMath::RenderMathMLMath(MathMLRowElement& element, RenderStyle&& style)
: RenderMathMLRow(element, WTFMove(style))
{
}
void RenderMathMLMath::centerChildren(LayoutUnit contentWidth)
{
auto centerBlockOffset = (logicalWidth() - contentWidth) / 2;
if (!centerBlockOffset)
return;
if (!style().isLeftToRightDirection())
centerBlockOffset = -centerBlockOffset;
for (auto* child = firstChildBox(); child; child = child->nextSiblingBox()) {
if (!child->isInFlow())
continue;
auto repaintRect = child->checkForRepaintDuringLayout() ? std::make_optional(child->frameRect()) : std::nullopt;
child->move(centerBlockOffset, { });
if (repaintRect) {
repaintRect->uniteEvenIfEmpty(child->frameRect());
repaintRectangle(*repaintRect);
}
}
}
void RenderMathMLMath::layoutBlock(bool relayoutChildren, LayoutUnit pageLogicalHeight)
{
ASSERT(needsLayout());
if (style().display() != DisplayType::Block) {
RenderMathMLRow::layoutBlock(relayoutChildren, pageLogicalHeight);
return;
}
if (!relayoutChildren && simplifiedLayout())
return;
recomputeLogicalWidth();
setLogicalHeight(borderAndPaddingLogicalHeight() + scrollbarLogicalHeight());
LayoutUnit width, ascent, descent;
stretchVerticalOperatorsAndLayoutChildren();
getContentBoundingBox(width, ascent, descent);
layoutRowItems(logicalWidth(), ascent);
// Display formulas must be centered horizontally if there is extra space left.
// Otherwise, logical width must be updated to the content width to avoid truncation.
if (width < logicalWidth())
centerChildren(width);
else
setLogicalWidth(width);
setLogicalHeight(borderTop() + paddingTop() + ascent + descent + borderBottom() + paddingBottom() + horizontalScrollbarHeight());
updateLogicalHeight();
layoutPositionedObjects(relayoutChildren);
updateScrollInfoAfterLayout();
clearNeedsLayout();
}
}
#endif // ENABLE(MATHML)
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