1/* 2 * Copyright (C) 2012 Google Inc. 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 are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Neither the name of Google Inc. nor the names of its 11 * contributors may be used to endorse or promote products derived from 12 * this software without specific prior written permission. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 15 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 16 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 17 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 18 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 19 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 20 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include "config.h" 28#include "PseudoElement.h" 29 30#include "ContentData.h" 31#include "InspectorInstrumentation.h" 32#include "NodeRenderingContext.h" 33#include "RenderObject.h" 34#include "RenderQuote.h" 35 36namespace WebCore { 37 38const QualifiedName& pseudoElementTagName() 39{ 40 DEFINE_STATIC_LOCAL(QualifiedName, name, (nullAtom, "<pseudo>", nullAtom)); 41 return name; 42} 43 44String PseudoElement::pseudoElementNameForEvents(PseudoId pseudoId) 45{ 46 DEFINE_STATIC_LOCAL(const String, after, (ASCIILiteral("::after"))); 47 DEFINE_STATIC_LOCAL(const String, before, (ASCIILiteral("::before"))); 48 switch (pseudoId) { 49 case AFTER: 50 return after; 51 case BEFORE: 52 return before; 53 default: 54 return emptyString(); 55 } 56} 57 58PseudoElement::PseudoElement(Element* parent, PseudoId pseudoId) 59 : Element(pseudoElementTagName(), parent->document(), CreatePseudoElement) 60 , m_pseudoId(pseudoId) 61{ 62 ASSERT(pseudoId != NOPSEUDO); 63 setParentOrShadowHostNode(parent); 64 setHasCustomStyleCallbacks(); 65} 66 67PseudoElement::~PseudoElement() 68{ 69#if USE(ACCELERATED_COMPOSITING) 70 InspectorInstrumentation::pseudoElementDestroyed(document()->page(), this); 71#endif 72} 73 74PassRefPtr<RenderStyle> PseudoElement::customStyleForRenderer() 75{ 76 return parentOrShadowHostElement()->renderer()->getCachedPseudoStyle(m_pseudoId); 77} 78 79void PseudoElement::attach(const AttachContext& context) 80{ 81 ASSERT(!renderer()); 82 83 Element::attach(context); 84 85 RenderObject* renderer = this->renderer(); 86 if (!renderer || !renderer->style()->regionThread().isEmpty()) 87 return; 88 89 RenderStyle* style = renderer->style(); 90 ASSERT(style->contentData()); 91 92 for (const ContentData* content = style->contentData(); content; content = content->next()) { 93 RenderObject* child = content->createRenderer(document(), style); 94 if (renderer->isChildAllowed(child, style)) { 95 renderer->addChild(child); 96 if (child->isQuote()) 97 toRenderQuote(child)->attachQuote(); 98 } else 99 child->destroy(); 100 } 101} 102 103bool PseudoElement::rendererIsNeeded(const NodeRenderingContext& context) 104{ 105 return pseudoElementRendererIsNeeded(context.style()); 106} 107 108void PseudoElement::didRecalcStyle(StyleChange) 109{ 110 if (!renderer()) 111 return; 112 113 // The renderers inside pseudo elements are anonymous so they don't get notified of recalcStyle and must have 114 // the style propagated downward manually similar to RenderObject::propagateStyleToAnonymousChildren. 115 RenderObject* renderer = this->renderer(); 116 for (RenderObject* child = renderer->nextInPreOrder(renderer); child; child = child->nextInPreOrder(renderer)) { 117 // We only manage the style for the generated content which must be images or text. 118 if (!child->isText() && !child->isRenderImage() && !child->isQuote()) 119 continue; 120 121 // The style for the RenderTextFragment for first letter is managed by an enclosing block, not by us. 122 if (child->style()->styleType() == FIRST_LETTER) 123 continue; 124 125 child->setPseudoStyle(renderer->style()); 126 } 127} 128 129} // namespace 130