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/inspector/InspectorInstrumentation.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(), CreateElement) 59 , m_pseudoId(pseudoId) 60{ 61 ASSERT(pseudoId != NOPSEUDO); 62 setParentOrShadowHostNode(parent); 63 setHasCustomStyleCallbacks(); 64} 65 66PassRefPtr<RenderStyle> PseudoElement::customStyleForRenderer() 67{ 68 return parentOrShadowHostElement()->renderer()->getCachedPseudoStyle(m_pseudoId); 69} 70 71void PseudoElement::dispose() 72{ 73 InspectorInstrumentation::pseudoElementDestroyed(this); 74 75 ASSERT(!nextSibling()); 76 ASSERT(!previousSibling()); 77 78 detach(); 79 RefPtr<Element> parent = parentOrShadowHostElement(); 80 setParentOrShadowHostNode(0); 81 removedFrom(parent.get()); 82} 83 84void PseudoElement::attach(const AttachContext& context) 85{ 86 ASSERT(!renderer()); 87 88 Element::attach(context); 89 90 RenderObject* renderer = this->renderer(); 91 if (!renderer) 92 return; 93 RenderStyle* style = renderer->style(); 94 if (style->hasFlowFrom()) 95 return; 96 if (style->styleType() != BEFORE && style->styleType() != AFTER) 97 return; 98 ASSERT(style->contentData()); 99 100 for (const ContentData* content = style->contentData(); content; content = content->next()) { 101 RenderObject* child = content->createRenderer(document(), style); 102 if (renderer->isChildAllowed(child, style)) { 103 renderer->addChild(child); 104 if (child->isQuote()) 105 toRenderQuote(child)->attachQuote(); 106 } else 107 child->destroy(); 108 } 109} 110 111bool PseudoElement::rendererIsNeeded(const RenderStyle& style) 112{ 113 return pseudoElementRendererIsNeeded(&style); 114} 115 116void PseudoElement::didRecalcStyle(StyleRecalcChange) 117{ 118 if (!renderer()) 119 return; 120 121 // The renderers inside pseudo elements are anonymous so they don't get notified of recalcStyle and must have 122 // the style propagated downward manually similar to RenderObject::propagateStyleToAnonymousChildren. 123 RenderObject* renderer = this->renderer(); 124 for (RenderObject* child = renderer->nextInPreOrder(renderer); child; child = child->nextInPreOrder(renderer)) { 125 // We only manage the style for the generated content items. 126 if (!child->isText() && !child->isQuote() && !child->isImage()) 127 continue; 128 129 // The style for the RenderTextFragment for first letter is managed by an enclosing block, not by us. 130 if (child->style()->styleType() == FIRST_LETTER) 131 continue; 132 133 child->setPseudoStyle(renderer->style()); 134 } 135} 136 137} // namespace 138