86 lines
3.5 KiB
C++
86 lines
3.5 KiB
C++
/*
|
|
* 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"
|
|
|
|
namespace WebCore {
|
|
|
|
inline MutationObserverInterestGroup::MutationObserverInterestGroup(HashMap<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, MutationObserver::MutationType type, MutationRecordDeliveryOptions oldValueFlag, const QualifiedName* attributeName)
|
|
{
|
|
ASSERT((type == MutationObserver::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) {
|
|
auto& 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
|