1 /* 2 * Copyright (c) 2011, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 #include "config.h" 27 28 #include "VisitedLinkStoreJava.h" 29 30 #include <WebCore/PageCache.h> 31 #include <wtf/NeverDestroyed.h> 32 33 34 using namespace WebCore; 35 36 static bool s_shouldTrackVisitedLinks; 37 38 static HashSet<VisitedLinkStoreJava*>& visitedLinkStores() 39 { 40 static NeverDestroyed<HashSet<VisitedLinkStoreJava*>> visitedLinkStores; 41 42 return visitedLinkStores; 43 } 44 45 Ref<VisitedLinkStoreJava> VisitedLinkStoreJava::create() 46 { 47 return adoptRef(*new VisitedLinkStoreJava); 48 } 49 50 VisitedLinkStoreJava::VisitedLinkStoreJava() 51 : m_visitedLinksPopulated(false) 52 { 53 visitedLinkStores().add(this); 54 } 55 56 VisitedLinkStoreJava::~VisitedLinkStoreJava() 57 { 58 visitedLinkStores().remove(this); 59 } 60 61 void VisitedLinkStoreJava::setShouldTrackVisitedLinks(bool shouldTrackVisitedLinks) 62 { 63 if (s_shouldTrackVisitedLinks == shouldTrackVisitedLinks) 64 return; 65 66 s_shouldTrackVisitedLinks = shouldTrackVisitedLinks; 67 if (!s_shouldTrackVisitedLinks) 68 removeAllVisitedLinks(); 69 } 70 71 void VisitedLinkStoreJava::removeAllVisitedLinks() 72 { 73 for (auto& visitedLinkStore : visitedLinkStores()) 74 visitedLinkStore->removeVisitedLinkHashes(); 75 } 76 77 void VisitedLinkStoreJava::addVisitedLink(const String& urlString) 78 { 79 addVisitedLinkHash(computeSharedStringHash(urlString)); 80 } 81 82 bool VisitedLinkStoreJava::isLinkVisited(Page& page, SharedStringHash linkHash, const URL&, const AtomicString&) 83 { 84 populateVisitedLinksIfNeeded(page); 85 86 return m_visitedLinkHashes.contains(linkHash); 87 } 88 89 void VisitedLinkStoreJava::addVisitedLink(Page&, SharedStringHash linkHash) 90 { 91 if (!s_shouldTrackVisitedLinks) 92 return; 93 94 addVisitedLinkHash(linkHash); 95 } 96 97 void VisitedLinkStoreJava::populateVisitedLinksIfNeeded(Page&) 98 { 99 if (m_visitedLinksPopulated) 100 return; 101 102 m_visitedLinksPopulated = true; 103 } 104 105 void VisitedLinkStoreJava::addVisitedLinkHash(SharedStringHash linkHash) 106 { 107 ASSERT(s_shouldTrackVisitedLinks); 108 m_visitedLinkHashes.add(linkHash); 109 110 invalidateStylesForLink(linkHash); 111 } 112 113 void VisitedLinkStoreJava::removeVisitedLinkHashes() 114 { 115 m_visitedLinksPopulated = false; 116 if (m_visitedLinkHashes.isEmpty()) 117 return; 118 m_visitedLinkHashes.clear(); 119 120 invalidateStylesForAllLinks(); 121 } 122 123