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/*
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "MutationObserverInterestGroup.h"
#include "MutationObserverRegistration.h"
#include "MutationRecord.h"
#include <wtf/TZoneMallocInlines.h>
namespace WebCore {
WTF_MAKE_TZONE_ALLOCATED_IMPL(MutationObserverInterestGroup);
inline MutationObserverInterestGroup::MutationObserverInterestGroup(UncheckedKeyHashMap<Ref<MutationObserver>, MutationRecordDeliveryOptions>&& observers, MutationRecordDeliveryOptions oldValueFlag)
: m_observers(WTFMove(observers))
, m_oldValueFlag(oldValueFlag)
{
ASSERT(!m_observers.isEmpty());
}
std::unique_ptr<MutationObserverInterestGroup> MutationObserverInterestGroup::createIfNeeded(Node& target, MutationObserverOptionType type, MutationRecordDeliveryOptions oldValueFlag, const QualifiedName* attributeName)
{
ASSERT((type == MutationObserverOptionType::Attributes && attributeName) || !attributeName);
auto observers = target.registeredMutationObservers(type, attributeName);
if (observers.isEmpty())
return nullptr;
return makeUnique<MutationObserverInterestGroup>(WTFMove(observers), oldValueFlag);
}
bool MutationObserverInterestGroup::isOldValueRequested() const
{
for (auto options : m_observers.values()) {
if (hasOldValue(options))
return true;
}
return false;
}
void MutationObserverInterestGroup::enqueueMutationRecord(Ref<MutationRecord>&& mutation)
{
RefPtr<MutationRecord> mutationWithNullOldValue;
for (auto& observerOptionsPair : m_observers) {
Ref observer = observerOptionsPair.key.get();
if (hasOldValue(observerOptionsPair.value)) {
observer->enqueueMutationRecord(mutation.copyRef());
continue;
}
if (!mutationWithNullOldValue) {
if (mutation->oldValue().isNull())
mutationWithNullOldValue = mutation.ptr();
else
mutationWithNullOldValue = MutationRecord::createWithNullOldValue(mutation).ptr();
}
observer->enqueueMutationRecord(*mutationWithNullOldValue);
}
}
} // namespace WebCore
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