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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 "RenderMathMLOperator.h"
namespace WebCore {
using namespace MathMLNames;
RenderMathMLRow::RenderMathMLRow(Element* element)
: RenderMathMLBlock(element)
{
}
// FIXME: Change all these createAnonymous... routines to return a PassOwnPtr<>.
RenderMathMLRow* RenderMathMLRow::createAnonymousWithParentRenderer(const RenderObject* parent)
{
RefPtr<RenderStyle> newStyle = RenderStyle::createAnonymousStyleWithDisplay(parent->style(), FLEX);
RenderMathMLRow* newMRow = new (parent->renderArena()) RenderMathMLRow(0);
newMRow->setDocumentForAnonymous(parent->document());
newMRow->setStyle(newStyle.release());
return newMRow;
}
void RenderMathMLRow::computePreferredLogicalWidths()
{
ASSERT(preferredLogicalWidthsDirty() && needsLayout());
#ifndef NDEBUG
// FIXME: Remove this once mathml stops modifying the render tree here.
SetLayoutNeededForbiddenScope layoutForbiddenScope(this, false);
#endif
computeChildrenPreferredLogicalHeights();
int stretchLogicalHeight = 0;
for (RenderObject* child = firstChild(); child; child = child->nextSibling()) {
if (child->isRenderMathMLBlock()) {
RenderMathMLOperator* renderMo = toRenderMathMLBlock(child)->unembellishedOperator();
// FIXME: Only skip renderMo if it is stretchy.
if (renderMo)
continue;
}
stretchLogicalHeight = max<int>(stretchLogicalHeight, roundToInt(preferredLogicalHeightAfterSizing(child)));
}
if (!stretchLogicalHeight)
stretchLogicalHeight = style()->fontSize();
// Set the sizes of (possibly embellished) stretchy operator children.
for (RenderObject* child = firstChild(); child; child = child->nextSibling()) {
if (child->isRenderMathMLBlock()) {
RenderMathMLOperator* renderMo = toRenderMathMLBlock(child)->unembellishedOperator();
if (renderMo)
renderMo->stretchToHeight(stretchLogicalHeight);
}
}
RenderMathMLBlock::computePreferredLogicalWidths();
// Shrink our logical width to its probable value now without triggering unnecessary relayout of our children.
ASSERT(needsLayout() && logicalWidth() >= maxPreferredLogicalWidth());
setLogicalWidth(maxPreferredLogicalWidth());
}
void RenderMathMLRow::layout()
{
// Our computePreferredLogicalWidths() may change our logical width and then layout our children, which
// RenderBlock::layout()'s relayoutChildren logic isn't expecting.
if (preferredLogicalWidthsDirty())
computePreferredLogicalWidths();
RenderMathMLBlock::layout();
}
}
#endif // ENABLE(MATHML)
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