src/third_party/WebKit/Source/core/dom/custom/CustomElementUpgradeCandidateMap.cpp

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  30
  31 #include "config.h"
  32 #include "core/dom/custom/CustomElementUpgradeCandidateMap.h"
  33
  34 #include "core/dom/Element.h"
  35
  36 namespace blink {
  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 #if ENABLE(OILPAN)
 116     visitor->trace(m_upgradeCandidates);
 117     visitor->trace(m_unresolvedDefinitions);
 118 #endif
 119     CustomElementObserver::trace(visitor);
 120 }
 121
 122 }