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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"
#if ENABLE(MATHML)
#include "RenderMathMLRow.h"
#include "MathMLNames.h"
#include "RenderIterator.h"
#include "RenderMathMLOperator.h"
#include "RenderMathMLRoot.h"
namespace WebCore {
using namespace MathMLNames;
RenderMathMLRow::RenderMathMLRow(Element& element, Ref<RenderStyle>&& style)
: RenderMathMLBlock(element, WTFMove(style))
{
}
RenderMathMLRow::RenderMathMLRow(Document& document, Ref<RenderStyle>&& style)
: RenderMathMLBlock(document, WTFMove(style))
{
}
RenderPtr<RenderMathMLRow> RenderMathMLRow::createAnonymousWithParentRenderer(RenderMathMLRoot& parent)
{
RenderPtr<RenderMathMLRow> newMRow = createRenderer<RenderMathMLRow>(parent.document(), RenderStyle::createAnonymousStyleWithDisplay(&parent.style(), FLEX));
newMRow->initializeStyle();
return newMRow;
}
void RenderMathMLRow::updateOperatorProperties()
{
for (RenderObject* child = firstChild(); child; child = child->nextSibling()) {
if (is<RenderMathMLBlock>(*child)) {
if (auto* renderOperator = downcast<RenderMathMLBlock>(*child).unembellishedOperator())
renderOperator->updateOperatorProperties();
}
}
setNeedsLayoutAndPrefWidthsRecalc();
}
void RenderMathMLRow::layout()
{
int stretchHeightAboveBaseline = 0, stretchDepthBelowBaseline = 0;
for (RenderObject* child = firstChild(); child; child = child->nextSibling()) {
if (child->needsLayout())
downcast<RenderElement>(*child).layout();
if (is<RenderMathMLBlock>(*child)) {
// We skip the stretchy operators as they must not be included in the computation of the stretch size.
auto* renderOperator = downcast<RenderMathMLBlock>(*child).unembellishedOperator();
if (renderOperator && renderOperator->hasOperatorFlag(MathMLOperatorDictionary::Stretchy))
continue;
}
LayoutUnit childHeightAboveBaseline = 0, childDepthBelowBaseline = 0;
if (is<RenderMathMLBlock>(*child)) {
RenderMathMLBlock& mathmlChild = downcast<RenderMathMLBlock>(*child);
childHeightAboveBaseline = mathmlChild.firstLineBaseline().valueOr(mathmlChild.logicalHeight());
childDepthBelowBaseline = mathmlChild.logicalHeight() - childHeightAboveBaseline;
} else if (is<RenderMathMLTable>(*child)) {
RenderMathMLTable& tableChild = downcast<RenderMathMLTable>(*child);
childHeightAboveBaseline = tableChild.firstLineBaseline().valueOr(-1);
childDepthBelowBaseline = tableChild.logicalHeight() - childHeightAboveBaseline;
} else if (is<RenderBox>(*child)) {
childHeightAboveBaseline = downcast<RenderBox>(*child).logicalHeight();
childDepthBelowBaseline = 0;
}
stretchHeightAboveBaseline = std::max<LayoutUnit>(stretchHeightAboveBaseline, childHeightAboveBaseline);
stretchDepthBelowBaseline = std::max<LayoutUnit>(stretchDepthBelowBaseline, childDepthBelowBaseline);
}
if (stretchHeightAboveBaseline + stretchDepthBelowBaseline <= 0)
stretchHeightAboveBaseline = style().fontSize();
// Set the sizes of (possibly embellished) stretchy operator children.
for (auto& child : childrenOfType<RenderMathMLBlock>(*this)) {
if (auto renderOperator = child.unembellishedOperator())
renderOperator->stretchTo(stretchHeightAboveBaseline, stretchDepthBelowBaseline);
}
RenderMathMLBlock::layout();
}
}
#endif // ENABLE(MATHML)
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