1/* 2 * Copyright (C) 2014 Frédéric Wang (fred.wang@free.fr). All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 14 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 15 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 16 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 17 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 18 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 19 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "RenderMathMLToken.h" 28 29#if ENABLE(MATHML) 30 31#include "MathMLNames.h" 32#include "RenderElement.h" 33#include "RenderIterator.h" 34 35namespace WebCore { 36 37using namespace MathMLNames; 38 39RenderMathMLToken::RenderMathMLToken(Element& element, PassRef<RenderStyle> style) 40 : RenderMathMLBlock(element, WTF::move(style)) 41 , m_containsElement(false) 42{ 43} 44 45RenderMathMLToken::RenderMathMLToken(Document& document, PassRef<RenderStyle> style) 46 : RenderMathMLBlock(document, WTF::move(style)) 47 , m_containsElement(false) 48{ 49} 50 51void RenderMathMLToken::addChild(RenderObject* newChild, RenderObject* beforeChild) 52{ 53 createWrapperIfNeeded(); 54 toRenderElement(firstChild())->addChild(newChild, beforeChild); 55} 56 57void RenderMathMLToken::createWrapperIfNeeded() 58{ 59 if (!firstChild()) { 60 RenderPtr<RenderMathMLBlock> wrapper = createAnonymousMathMLBlock(); 61 RenderMathMLBlock::addChild(wrapper.leakPtr()); 62 } 63} 64 65void RenderMathMLToken::updateTokenContent() 66{ 67 m_containsElement = false; 68 if (!isEmpty()) { 69 // The renderers corresponding to the children of the token element are wrapped inside an anonymous RenderMathMLBlock. 70 // When one of these renderers is a RenderElement, we handle the RenderMathMLToken differently. 71 // 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. 72 const auto& wrapper = toRenderElement(firstChild()); 73 if (const auto& block = toRenderElement(wrapper->firstChild())) 74 m_containsElement = childrenOfType<RenderElement>(*block).first(); 75 updateStyle(); 76 } 77 setNeedsLayoutAndPrefWidthsRecalc(); 78} 79 80void RenderMathMLToken::updateStyle() 81{ 82 const auto& tokenElement = element(); 83 84 const auto& wrapper = toRenderElement(firstChild()); 85 auto newStyle = RenderStyle::createAnonymousStyleWithDisplay(&style(), FLEX); 86 87 if (tokenElement.hasTagName(MathMLNames::miTag)) { 88 // This tries to emulate the default mathvariant value on <mi> using the CSS font-style property. 89 // FIXME: This should be revised when mathvariant is implemented (http://wkbug/85735) and when fonts with Mathematical Alphanumeric Symbols characters are more popular. 90 FontDescription fontDescription(newStyle.get().fontDescription()); 91 FontSelector* fontSelector = newStyle.get().font().fontSelector(); 92 if (!m_containsElement && element().textContent().stripWhiteSpace().simplifyWhiteSpace().length() == 1 && !tokenElement.hasAttribute(mathvariantAttr)) 93 fontDescription.setItalic(true); 94 if (newStyle.get().setFontDescription(fontDescription)) 95 newStyle.get().font().update(fontSelector); 96 } 97 98 wrapper->setStyle(WTF::move(newStyle)); 99 wrapper->setNeedsLayoutAndPrefWidthsRecalc(); 100} 101 102void RenderMathMLToken::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) 103{ 104 RenderMathMLBlock::styleDidChange(diff, oldStyle); 105 if (!isEmpty()) 106 updateStyle(); 107} 108 109void RenderMathMLToken::updateFromElement() 110{ 111 RenderMathMLBlock::updateFromElement(); 112 if (!isEmpty()) 113 updateStyle(); 114} 115 116} 117 118#endif // ENABLE(MATHML) 119