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 "core/dom/PseudoElement.h" 29 30#include "core/dom/NodeRenderingContext.h" 31#include "core/rendering/RenderObject.h" 32#include "core/rendering/RenderQuote.h" 33#include "core/rendering/style/ContentData.h" 34 35namespace WebCore { 36 37const QualifiedName& pseudoElementTagName() 38{ 39 DEFINE_STATIC_LOCAL(QualifiedName, name, (nullAtom, "<pseudo>", nullAtom)); 40 return name; 41} 42 43String PseudoElement::pseudoElementNameForEvents(PseudoId pseudoId) 44{ 45 DEFINE_STATIC_LOCAL(const String, after, ("::after")); 46 DEFINE_STATIC_LOCAL(const String, before, ("::before")); 47 switch (pseudoId) { 48 case AFTER: 49 return after; 50 case BEFORE: 51 return before; 52 default: 53 return emptyString(); 54 } 55} 56 57PseudoElement::PseudoElement(Element* parent, PseudoId pseudoId) 58 : Element(pseudoElementTagName(), parent->document(), CreatePseudoElement) 59 , m_pseudoId(pseudoId) 60{ 61 ASSERT(pseudoId != NOPSEUDO); 62 setParentOrShadowHostNode(parent); 63 setHasCustomStyleCallbacks(); 64} 65 66PseudoElement::~PseudoElement() 67{ 68} 69 70PassRefPtr<RenderStyle> PseudoElement::customStyleForRenderer() 71{ 72 return parentOrShadowHostElement()->renderer()->getCachedPseudoStyle(m_pseudoId); 73} 74 75void PseudoElement::attach(const AttachContext& context) 76{ 77 ASSERT(!renderer()); 78 79 Element::attach(context); 80 81 RenderObject* renderer = this->renderer(); 82 if (!renderer) 83 return; 84 RenderStyle* style = renderer->style(); 85 if (!style->regionThread().isEmpty()) 86 return; 87 if (style->styleType() != BEFORE && style->styleType() != AFTER) 88 return; 89 ASSERT(style->contentData()); 90 91 for (const ContentData* content = style->contentData(); content; content = content->next()) { 92 RenderObject* child = content->createRenderer(document(), style); 93 if (renderer->isChildAllowed(child, style)) { 94 renderer->addChild(child); 95 if (child->isQuote()) 96 toRenderQuote(child)->attachQuote(); 97 } else 98 child->destroy(); 99 } 100} 101 102bool PseudoElement::rendererIsNeeded(const NodeRenderingContext& context) 103{ 104 return pseudoElementRendererIsNeeded(context.style()); 105} 106 107void PseudoElement::didRecalcStyle(StyleChange) 108{ 109 if (!renderer()) 110 return; 111 112 // The renderers inside pseudo elements are anonymous so they don't get notified of recalcStyle and must have 113 // the style propagated downward manually similar to RenderObject::propagateStyleToAnonymousChildren. 114 RenderObject* renderer = this->renderer(); 115 for (RenderObject* child = renderer->nextInPreOrder(renderer); child; child = child->nextInPreOrder(renderer)) { 116 // We only manage the style for the generated content items. 117 if (!child->isText() && !child->isQuote() && !child->isImage()) 118 continue; 119 120 // The style for the RenderTextFragment for first letter is managed by an enclosing block, not by us. 121 if (child->style()->styleType() == FIRST_LETTER) 122 continue; 123 124 child->setPseudoStyle(renderer->style()); 125 } 126} 127 128} // namespace 129