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/*
* Copyright (C) 2014 Gurpreet Kaur (k.gurpreet@samsung.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.
*/
#define _USE_MATH_DEFINES 1
#include "config.h"
#if ENABLE(MATHML)
#include "RenderMathMLMenclose.h"
#include "GraphicsContext.h"
#include "MathMLMencloseElement.h"
#include "PaintInfo.h"
#include "RenderMathMLSquareRoot.h"
#include <wtf/MathExtras.h>
namespace WebCore {
using namespace MathMLNames;
RenderMathMLMenclose::RenderMathMLMenclose(Element& element, PassRef<RenderStyle> style)
: RenderMathMLRow(element, WTF::move(style))
{
}
void RenderMathMLMenclose::addChild(RenderObject* newChild, RenderObject* beforeChild)
{
MathMLMencloseElement* menclose = toMathMLMencloseElement(element());
// Allow an anonymous RenderMathMLSquareRoot to handle drawing the radical
// notation, rather than duplicating the code needed to paint a root.
if (!firstChild() && menclose->isRadical())
RenderMathMLBlock::addChild(RenderMathMLSquareRoot::createAnonymousWithParentRenderer(*this).leakPtr());
if (newChild) {
if (firstChild() && menclose->isRadical())
toRenderElement(firstChild())->addChild(newChild, beforeChild && beforeChild->parent() == firstChild() ? beforeChild : nullptr);
else
RenderMathMLBlock::addChild(newChild, beforeChild);
}
}
void RenderMathMLMenclose::computePreferredLogicalWidths()
{
ASSERT(preferredLogicalWidthsDirty());
RenderMathMLBlock::computePreferredLogicalWidths();
const int paddingTop = 6;
MathMLMencloseElement* menclose = toMathMLMencloseElement(element());
const Vector<String>& notationValues = menclose->notationValues();
size_t notationalValueSize = notationValues.size();
for (size_t i = 0; i < notationalValueSize; i++) {
if (notationValues[i] == "circle") {
m_minPreferredLogicalWidth = minPreferredLogicalWidth() * float(M_SQRT2);
m_maxPreferredLogicalWidth = maxPreferredLogicalWidth() * float(M_SQRT2);
}
}
if (menclose->isDefaultLongDiv()) {
style().setPaddingTop(Length(paddingTop, Fixed));
style().setPaddingLeft(Length(menclose->longDivLeftPadding().toInt(), Fixed));
}
setPreferredLogicalWidthsDirty(false);
}
void RenderMathMLMenclose::updateLogicalHeight()
{
MathMLMencloseElement* menclose = toMathMLMencloseElement(element());
const Vector<String>& notationValues = menclose->notationValues();
size_t notationalValueSize = notationValues.size();
for (size_t i = 0; i < notationalValueSize; i++)
if (notationValues[i] == "circle")
setLogicalHeight(logicalHeight() * float(M_SQRT2));
}
void RenderMathMLMenclose::paint(PaintInfo& info, const LayoutPoint& paintOffset)
{
RenderMathMLBlock::paint(info, paintOffset);
if (info.context->paintingDisabled() || info.phase != PaintPhaseForeground || style().visibility() != VISIBLE)
return;
MathMLMencloseElement* menclose = toMathMLMencloseElement(element());
const Vector<String>& notationValues = menclose->notationValues();
size_t notationalValueSize = notationValues.size();
bool isDefaultLongDiv = menclose->isDefaultLongDiv();
if ((notationalValueSize && checkNotationalValuesValidity(notationValues)) || isDefaultLongDiv) {
IntRect rect = absoluteBoundingBoxRect();
int left = rect.x();
int top = rect.y();
int boxWidth = rect.width();
int boxHeight = rect.height();
int halfboxWidth = rect.width() / 2;
int halfboxHeight = rect.height() / 2;
GraphicsContextStateSaver stateSaver(*info.context);
info.context->setStrokeThickness(1);
info.context->setStrokeStyle(SolidStroke);
info.context->setStrokeColor(style().visitedDependentColor(CSSPropertyColor), ColorSpaceDeviceRGB);
// TODO add support for notation value updiagonalarrow https://bugs.webkit.org/show_bug.cgi?id=127466
for (size_t i = 0; i < notationalValueSize; i++) {
if (notationValues[i] == "updiagonalstrike")
info.context->drawLine(IntPoint(left, top + boxHeight), IntPoint(left + boxWidth, top));
else if (notationValues[i] == "downdiagonalstrike")
info.context->drawLine(IntPoint(left, top), IntPoint(left + boxWidth, top + boxHeight));
else if (notationValues[i] == "verticalstrike")
info.context->drawLine(IntPoint(left + halfboxWidth, top), IntPoint(left + halfboxWidth, top + boxHeight));
else if (notationValues[i] == "horizontalstrike")
info.context->drawLine(IntPoint(left, top + halfboxHeight), IntPoint(left + boxWidth, top + halfboxHeight));
else if (notationValues[i] == "circle") {
info.context->setFillColor(Color::transparent, ColorSpaceDeviceRGB);
info.context->drawEllipse(rect);
} else if (notationValues[i] == "longdiv")
isDefaultLongDiv = true;
}
if (isDefaultLongDiv) {
Path root;
int midxPoint = 0;
root.moveTo(FloatPoint(left, top));
int childLeft = firstChild() ? firstChild()->absoluteBoundingBoxRect().x() : 0;
if (childLeft)
midxPoint= childLeft - left;
else
midxPoint = style().paddingLeft().value();
root.addBezierCurveTo(FloatPoint(left, top), FloatPoint(left + midxPoint, top + halfboxHeight), FloatPoint(left, top + boxHeight));
info.context->strokePath(root);
if (isDefaultLongDiv)
info.context->drawLine(IntPoint(left, top), IntPoint(left + boxWidth + midxPoint, top));
}
}
}
bool RenderMathMLMenclose::checkNotationalValuesValidity(const Vector<String>& attr) const
{
size_t attrSize = attr.size();
for (size_t i = 0; i < attrSize; i++) {
if (attr[i] == "updiagonalstrike" || attr[i] == "downdiagonalstrike" || attr[i] == "horizontalstrike" || attr[i] == "verticalstrike"
|| attr[i] == "circle" || attr[i] == "longdiv")
return true;
}
return false;
}
}
#endif // ENABLE(MATHML)
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