2 * Copyright (C) 2012 Google Inc. All Rights Reserved.
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5 * modification, are permitted provided that the following conditions
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27 #include "core/dom/IdTargetObserverRegistry.h"
29 #include "core/dom/IdTargetObserver.h"
33 PassOwnPtr<IdTargetObserverRegistry> IdTargetObserverRegistry::create()
35 return adoptPtr(new IdTargetObserverRegistry());
38 void IdTargetObserverRegistry::addObserver(const AtomicString& id, IdTargetObserver* observer)
43 IdToObserverSetMap::AddResult result = m_registry.add(id.impl(), nullptr);
44 if (result.isNewEntry)
45 result.storedValue->value = adoptPtr(new ObserverSet());
47 result.storedValue->value->add(observer);
50 void IdTargetObserverRegistry::removeObserver(const AtomicString& id, IdTargetObserver* observer)
52 if (id.isEmpty() || m_registry.isEmpty())
55 IdToObserverSetMap::iterator iter = m_registry.find(id.impl());
57 ObserverSet* set = iter->value.get();
58 set->remove(observer);
59 if (set->isEmpty() && set != m_notifyingObserversInSet)
60 m_registry.remove(iter);
63 void IdTargetObserverRegistry::notifyObserversInternal(const AtomicString& id)
65 ASSERT(!id.isEmpty());
66 ASSERT(!m_registry.isEmpty());
68 m_notifyingObserversInSet = m_registry.get(id.impl());
69 if (!m_notifyingObserversInSet)
72 Vector<IdTargetObserver*> copy;
73 copyToVector(*m_notifyingObserversInSet, copy);
74 for (Vector<IdTargetObserver*>::const_iterator it = copy.begin(); it != copy.end(); ++it) {
75 if (m_notifyingObserversInSet->contains(*it))
76 (*it)->idTargetChanged();
79 if (m_notifyingObserversInSet->isEmpty())
80 m_registry.remove(id.impl());
82 m_notifyingObserversInSet = 0;
85 bool IdTargetObserverRegistry::hasObservers(const AtomicString& id) const
87 if (id.isEmpty() || m_registry.isEmpty())
89 ObserverSet* set = m_registry.get(id.impl());
90 return set && !set->isEmpty();
93 } // namespace WebCore