1 /* 2 * Copyright (C) 2013 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 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include "config.h" 32 #include "core/dom/custom/CustomElementUpgradeCandidateMap.h" 33 34 #include "core/dom/Element.h" 35 36 namespace WebCore { 37 38 PassOwnPtrWillBeRawPtr<CustomElementUpgradeCandidateMap> CustomElementUpgradeCandidateMap::create() 39 { 40 return adoptPtrWillBeNoop(new CustomElementUpgradeCandidateMap()); 41 } 42 43 CustomElementUpgradeCandidateMap::~CustomElementUpgradeCandidateMap() 44 { 45 #if !ENABLE(OILPAN) 46 // With Oilpan enabled, the observer table keeps a weak reference to the 47 // element; no need for explicit removal. 48 UpgradeCandidateMap::const_iterator::Keys end = m_upgradeCandidates.end().keys(); 49 for (UpgradeCandidateMap::const_iterator::Keys it = m_upgradeCandidates.begin().keys(); it != end; ++it) 50 unobserve(*it); 51 #endif 52 } 53 54 void CustomElementUpgradeCandidateMap::add(const CustomElementDescriptor& descriptor, Element* element) 55 { 56 observe(element); 57 58 UpgradeCandidateMap::AddResult result = m_upgradeCandidates.add(element, descriptor); 59 ASSERT_UNUSED(result, result.isNewEntry); 60 61 UnresolvedDefinitionMap::iterator it = m_unresolvedDefinitions.find(descriptor); 62 ElementSet* elements; 63 if (it == m_unresolvedDefinitions.end()) 64 elements = m_unresolvedDefinitions.add(descriptor, adoptPtrWillBeNoop(new ElementSet())).storedValue->value.get(); 65 else 66 elements = it->value.get(); 67 elements->add(element); 68 } 69 70 void CustomElementUpgradeCandidateMap::elementWasDestroyed(Element* element) 71 { 72 CustomElementObserver::elementWasDestroyed(element); 73 UpgradeCandidateMap::iterator candidate = m_upgradeCandidates.find(element); 74 ASSERT_WITH_SECURITY_IMPLICATION(candidate != m_upgradeCandidates.end()); 75 76 UnresolvedDefinitionMap::iterator elements = m_unresolvedDefinitions.find(candidate->value); 77 ASSERT_WITH_SECURITY_IMPLICATION(elements != m_unresolvedDefinitions.end()); 78 elements->value->remove(element); 79 m_upgradeCandidates.remove(candidate); 80 } 81 82 void CustomElementUpgradeCandidateMap::elementDidFinishParsingChildren(Element* element) 83 { 84 // An upgrade candidate finished parsing; reorder so that eventual 85 // upgrade order matches finished-parsing order. 86 moveToEnd(element); 87 } 88 89 void CustomElementUpgradeCandidateMap::moveToEnd(Element* element) 90 { 91 UpgradeCandidateMap::iterator candidate = m_upgradeCandidates.find(element); 92 ASSERT_WITH_SECURITY_IMPLICATION(candidate != m_upgradeCandidates.end()); 93 94 UnresolvedDefinitionMap::iterator elements = m_unresolvedDefinitions.find(candidate->value); 95 ASSERT_WITH_SECURITY_IMPLICATION(elements != m_unresolvedDefinitions.end()); 96 elements->value->appendOrMoveToLast(element); 97 } 98 99 PassOwnPtrWillBeRawPtr<CustomElementUpgradeCandidateMap::ElementSet> CustomElementUpgradeCandidateMap::takeUpgradeCandidatesFor(const CustomElementDescriptor& descriptor) 100 { 101 OwnPtrWillBeRawPtr<ElementSet> candidates = m_unresolvedDefinitions.take(descriptor); 102 103 if (!candidates) 104 return nullptr; 105 106 for (ElementSet::const_iterator candidate = candidates->begin(); candidate != candidates->end(); ++candidate) { 107 unobserve(*candidate); 108 m_upgradeCandidates.remove(*candidate); 109 } 110 return candidates.release(); 111 } 112 113 void CustomElementUpgradeCandidateMap::trace(Visitor* visitor) 114 { 115 visitor->trace(m_upgradeCandidates); 116 visitor->trace(m_unresolvedDefinitions); 117 CustomElementObserver::trace(visitor); 118 } 119 120 } 121