2 * Copyright (C) 2012 Google Inc. All Rights Reserved.
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27 #include "core/dom/IdTargetObserverRegistry.h"
29 #include "core/dom/IdTargetObserver.h"
33 PassOwnPtrWillBeRawPtr<IdTargetObserverRegistry> IdTargetObserverRegistry::create()
35 return adoptPtrWillBeNoop(new IdTargetObserverRegistry());
38 void IdTargetObserverRegistry::trace(Visitor* visitor)
40 visitor->trace(m_registry);
41 visitor->trace(m_notifyingObserversInSet);
44 void IdTargetObserverRegistry::addObserver(const AtomicString& id, IdTargetObserver* observer)
49 IdToObserverSetMap::AddResult result = m_registry.add(id.impl(), nullptr);
50 if (result.isNewEntry)
51 result.storedValue->value = adoptPtrWillBeNoop(new ObserverSet());
53 result.storedValue->value->add(observer);
56 void IdTargetObserverRegistry::removeObserver(const AtomicString& id, IdTargetObserver* observer)
58 if (id.isEmpty() || m_registry.isEmpty())
61 IdToObserverSetMap::iterator iter = m_registry.find(id.impl());
63 ObserverSet* set = iter->value.get();
64 set->remove(observer);
65 if (set->isEmpty() && set != m_notifyingObserversInSet)
66 m_registry.remove(iter);
69 void IdTargetObserverRegistry::notifyObserversInternal(const AtomicString& id)
71 ASSERT(!id.isEmpty());
72 ASSERT(!m_registry.isEmpty());
74 m_notifyingObserversInSet = m_registry.get(id.impl());
75 if (!m_notifyingObserversInSet)
78 WillBeHeapVector<RawPtrWillBeMember<IdTargetObserver> > copy;
79 copyToVector(*m_notifyingObserversInSet, copy);
80 for (WillBeHeapVector<RawPtrWillBeMember<IdTargetObserver> >::const_iterator it = copy.begin(); it != copy.end(); ++it) {
81 if (m_notifyingObserversInSet->contains(*it))
82 (*it)->idTargetChanged();
85 if (m_notifyingObserversInSet->isEmpty())
86 m_registry.remove(id.impl());
88 m_notifyingObserversInSet = nullptr;
91 bool IdTargetObserverRegistry::hasObservers(const AtomicString& id) const
93 if (id.isEmpty() || m_registry.isEmpty())
95 ObserverSet* set = m_registry.get(id.impl());
96 return set && !set->isEmpty();
99 } // namespace WebCore