1/* 2 * Copyright (C) 2012 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 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "IdTargetObserverRegistry.h" 28 29#include "IdTargetObserver.h" 30 31namespace WebCore { 32 33void IdTargetObserverRegistry::addObserver(const AtomicString& id, IdTargetObserver* observer) 34{ 35 if (id.isEmpty()) 36 return; 37 38 IdToObserverSetMap::AddResult result = m_registry.add(id.impl(), nullptr); 39 if (result.isNewEntry) 40 result.iterator->value = std::make_unique<ObserverSet>(); 41 42 result.iterator->value->add(observer); 43} 44 45void IdTargetObserverRegistry::removeObserver(const AtomicString& id, IdTargetObserver* observer) 46{ 47 if (id.isEmpty() || m_registry.isEmpty()) 48 return; 49 50 IdToObserverSetMap::iterator iter = m_registry.find(id.impl()); 51 52 ObserverSet* set = iter->value.get(); 53 set->remove(observer); 54 if (set->isEmpty() && set != m_notifyingObserversInSet) 55 m_registry.remove(iter); 56} 57 58void IdTargetObserverRegistry::notifyObserversInternal(const AtomicStringImpl& id) 59{ 60 ASSERT(!m_registry.isEmpty()); 61 62 m_notifyingObserversInSet = m_registry.get(&id); 63 if (!m_notifyingObserversInSet) 64 return; 65 66 Vector<IdTargetObserver*> copy; 67 copyToVector(*m_notifyingObserversInSet, copy); 68 for (Vector<IdTargetObserver*>::const_iterator it = copy.begin(); it != copy.end(); ++it) { 69 if (m_notifyingObserversInSet->contains(*it)) 70 (*it)->idTargetChanged(); 71 } 72 73 if (m_notifyingObserversInSet->isEmpty()) 74 m_registry.remove(&id); 75 76 m_notifyingObserversInSet = 0; 77} 78 79} // namespace WebCore 80