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 "RenderElement.h" 33#include "RenderImage.h" 34#include "RenderQuote.h" 35 36namespace WebCore { 37 38const QualifiedName& pseudoElementTagName() 39{ 40 DEPRECATED_DEFINE_STATIC_LOCAL(QualifiedName, name, (nullAtom, "<pseudo>", nullAtom)); 41 return name; 42} 43 44String PseudoElement::pseudoElementNameForEvents(PseudoId pseudoId) 45{ 46 DEPRECATED_DEFINE_STATIC_LOCAL(const String, after, (ASCIILiteral("::after"))); 47 DEPRECATED_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& host, PseudoId pseudoId) 59 : Element(pseudoElementTagName(), host.document(), CreatePseudoElement) 60 , m_hostElement(&host) 61 , m_pseudoId(pseudoId) 62{ 63 ASSERT(pseudoId == BEFORE || pseudoId == AFTER); 64 setHasCustomStyleResolveCallbacks(); 65} 66 67PseudoElement::~PseudoElement() 68{ 69 ASSERT(!m_hostElement); 70 InspectorInstrumentation::pseudoElementDestroyed(document().page(), this); 71} 72 73PassRefPtr<RenderStyle> PseudoElement::customStyleForRenderer(RenderStyle& parentStyle) 74{ 75 return m_hostElement->renderer()->getCachedPseudoStyle(m_pseudoId, &parentStyle); 76} 77 78void PseudoElement::didAttachRenderers() 79{ 80 RenderElement* renderer = this->renderer(); 81 if (!renderer || renderer->style().hasFlowFrom()) 82 return; 83 84 const RenderStyle& style = renderer->style(); 85 ASSERT(style.contentData()); 86 87 for (const ContentData* content = style.contentData(); content; content = content->next()) { 88 auto child = content->createContentRenderer(document(), style); 89 if (renderer->isChildAllowed(*child, style)) { 90 auto* childPtr = child.get(); 91 renderer->addChild(child.leakPtr()); 92 if (childPtr->isQuote()) 93 toRenderQuote(childPtr)->attachQuote(); 94 } 95 } 96} 97 98bool PseudoElement::rendererIsNeeded(const RenderStyle& style) 99{ 100 return pseudoElementRendererIsNeeded(&style); 101} 102 103void PseudoElement::didRecalcStyle(Style::Change) 104{ 105 if (!renderer()) 106 return; 107 108 // The renderers inside pseudo elements are anonymous so they don't get notified of recalcStyle and must have 109 // the style propagated downward manually similar to RenderObject::propagateStyleToAnonymousChildren. 110 RenderObject* renderer = this->renderer(); 111 for (RenderObject* child = renderer->nextInPreOrder(renderer); child; child = child->nextInPreOrder(renderer)) { 112 // We only manage the style for the generated content which must be images or text. 113 if (!child->isRenderImage() && !child->isQuote()) 114 continue; 115 PassRef<RenderStyle> createdStyle = RenderStyle::createStyleInheritingFromPseudoStyle(renderer->style()); 116 toRenderElement(*child).setStyle(WTF::move(createdStyle)); 117 } 118} 119 120} // namespace 121