RenderMathMLRow.cpp [plain text]
#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, WTF::move(style))
{
}
RenderMathMLRow::RenderMathMLRow(Document& document, Ref<RenderStyle>&& style)
: RenderMathMLBlock(document, WTF::move(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)) {
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();
for (auto& child : childrenOfType<RenderMathMLBlock>(*this)) {
if (auto renderOperator = child.unembellishedOperator())
renderOperator->stretchTo(stretchHeightAboveBaseline, stretchDepthBelowBaseline);
}
RenderMathMLBlock::layout();
}
}
#endif // ENABLE(MATHML)