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/*
* Copyright (C) 2014 Frédéric Wang (fred.wang@free.fr). 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 "RenderMathMLToken.h"
#if ENABLE(MATHML)
#include "MathMLNames.h"
#include "RenderElement.h"
#include "RenderIterator.h"
namespace WebCore {
using namespace MathMLNames;
RenderMathMLToken::RenderMathMLToken(Element& element, PassRef<RenderStyle> style)
: RenderMathMLBlock(element, WTF::move(style))
, m_containsElement(false)
{
}
RenderMathMLToken::RenderMathMLToken(Document& document, PassRef<RenderStyle> style)
: RenderMathMLBlock(document, WTF::move(style))
, m_containsElement(false)
{
}
void RenderMathMLToken::addChild(RenderObject* newChild, RenderObject* beforeChild)
{
createWrapperIfNeeded();
toRenderElement(firstChild())->addChild(newChild, beforeChild);
}
void RenderMathMLToken::createWrapperIfNeeded()
{
if (!firstChild()) {
RenderPtr<RenderMathMLBlock> wrapper = createAnonymousMathMLBlock();
RenderMathMLBlock::addChild(wrapper.leakPtr());
}
}
void RenderMathMLToken::updateTokenContent()
{
m_containsElement = false;
if (!isEmpty()) {
// The renderers corresponding to the children of the token element are wrapped inside an anonymous RenderMathMLBlock.
// When one of these renderers is a RenderElement, we handle the RenderMathMLToken differently.
// For some reason, an additional anonymous RenderBlock is created as a child of the RenderMathMLToken and the renderers are actually inserted into that RenderBlock so we need to dig down one additional level here.
const auto& wrapper = toRenderElement(firstChild());
if (const auto& block = toRenderElement(wrapper->firstChild()))
m_containsElement = childrenOfType<RenderElement>(*block).first();
updateStyle();
}
setNeedsLayoutAndPrefWidthsRecalc();
}
void RenderMathMLToken::updateStyle()
{
const auto& tokenElement = element();
const auto& wrapper = toRenderElement(firstChild());
auto newStyle = RenderStyle::createAnonymousStyleWithDisplay(&style(), FLEX);
if (tokenElement.hasTagName(MathMLNames::miTag)) {
// This tries to emulate the default mathvariant value on <mi> using the CSS font-style property.
// FIXME: This should be revised when mathvariant is implemented (http://wkbug/85735) and when fonts with Mathematical Alphanumeric Symbols characters are more popular.
FontDescription fontDescription(newStyle.get().fontDescription());
FontSelector* fontSelector = newStyle.get().font().fontSelector();
if (!m_containsElement && element().textContent().stripWhiteSpace().simplifyWhiteSpace().length() == 1 && !tokenElement.hasAttribute(mathvariantAttr))
fontDescription.setItalic(true);
if (newStyle.get().setFontDescription(fontDescription))
newStyle.get().font().update(fontSelector);
}
wrapper->setStyle(WTF::move(newStyle));
wrapper->setNeedsLayoutAndPrefWidthsRecalc();
}
void RenderMathMLToken::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
RenderMathMLBlock::styleDidChange(diff, oldStyle);
if (!isEmpty())
updateStyle();
}
void RenderMathMLToken::updateFromElement()
{
RenderMathMLBlock::updateFromElement();
if (!isEmpty())
updateStyle();
}
}
#endif // ENABLE(MATHML)
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