1/* 2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org) 3 * (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com) 4 * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com) 5 * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved. 6 * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org> 7 * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org> 8 * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/) 9 * Copyright (c) 2011, Code Aurora Forum. All rights reserved. 10 * Copyright (C) Research In Motion Limited 2011. All rights reserved. 11 * Copyright (C) 2012 Google Inc. All rights reserved. 12 * 13 * This library is free software; you can redistribute it and/or 14 * modify it under the terms of the GNU Library General Public 15 * License as published by the Free Software Foundation; either 16 * version 2 of the License, or (at your option) any later version. 17 * 18 * This library is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 21 * Library General Public License for more details. 22 * 23 * You should have received a copy of the GNU Library General Public License 24 * along with this library; see the file COPYING.LIB. If not, write to 25 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 26 * Boston, MA 02110-1301, USA. 27 */ 28 29#include "config.h" 30#include "VisitedLinkState.h" 31 32#include "ElementIterator.h" 33#include "Frame.h" 34#include "HTMLAnchorElement.h" 35#include "Page.h" 36#include "PageGroup.h" 37#include "VisitedLinkStore.h" 38#include "XLinkNames.h" 39 40namespace WebCore { 41 42using namespace HTMLNames; 43 44inline static const AtomicString* linkAttribute(Element& element) 45{ 46 if (!element.isLink()) 47 return 0; 48 if (element.isHTMLElement()) 49 return &element.fastGetAttribute(HTMLNames::hrefAttr); 50 if (element.isSVGElement()) 51 return &element.getAttribute(XLinkNames::hrefAttr); 52 return 0; 53} 54 55VisitedLinkState::VisitedLinkState(Document& document) 56 : m_document(document) 57{ 58} 59 60void VisitedLinkState::invalidateStyleForAllLinks() 61{ 62 if (m_linksCheckedForVisitedState.isEmpty()) 63 return; 64 for (auto& element : descendantsOfType<Element>(m_document)) { 65 if (element.isLink()) 66 element.setNeedsStyleRecalc(); 67 } 68} 69 70inline static LinkHash linkHashForElement(Document& document, Element& element) 71{ 72 if (isHTMLAnchorElement(element)) 73 return toHTMLAnchorElement(element).visitedLinkHash(); 74 if (const AtomicString* attribute = linkAttribute(element)) 75 return WebCore::visitedLinkHash(document.baseURL(), *attribute); 76 return 0; 77} 78 79void VisitedLinkState::invalidateStyleForLink(LinkHash linkHash) 80{ 81 if (!m_linksCheckedForVisitedState.contains(linkHash)) 82 return; 83 for (auto& element : descendantsOfType<Element>(m_document)) { 84 if (linkHashForElement(m_document, element) == linkHash) 85 element.setNeedsStyleRecalc(); 86 } 87} 88 89EInsideLink VisitedLinkState::determineLinkStateSlowCase(Element& element) 90{ 91 ASSERT(element.isLink()); 92 93 const AtomicString* attribute = linkAttribute(element); 94 if (!attribute || attribute->isNull()) 95 return NotInsideLink; 96 97 // An empty href refers to the document itself which is always visited. It is useful to check this explicitly so 98 // that visited links can be tested in platform independent manner, without explicit support in the test harness. 99 if (attribute->isEmpty()) 100 return InsideVisitedLink; 101 102 LinkHash hash; 103 if (isHTMLAnchorElement(element)) 104 hash = toHTMLAnchorElement(element).visitedLinkHash(); 105 else 106 hash = WebCore::visitedLinkHash(element.document().baseURL(), *attribute); 107 108 if (!hash) 109 return InsideUnvisitedLink; 110 111 Frame* frame = element.document().frame(); 112 if (!frame) 113 return InsideUnvisitedLink; 114 115 Page* page = frame->page(); 116 if (!page) 117 return InsideUnvisitedLink; 118 119 m_linksCheckedForVisitedState.add(hash); 120 121 if (!page->visitedLinkStore().isLinkVisited(*page, hash, element.document().baseURL(), *attribute)) 122 return InsideUnvisitedLink; 123 124 return InsideVisitedLink; 125} 126 127} // namespace WebCore 128