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87 lines
3.8 KiB
C++
87 lines
3.8 KiB
C++
/*
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* Copyright (C) 2011 Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SKY_ENGINE_CORE_DOM_MUTATIONOBSERVERINTERESTGROUP_H_
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#define SKY_ENGINE_CORE_DOM_MUTATIONOBSERVERINTERESTGROUP_H_
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#include "sky/engine/core/dom/Document.h"
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#include "sky/engine/core/dom/MutationObserver.h"
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#include "sky/engine/core/dom/Node.h"
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#include "sky/engine/core/dom/QualifiedName.h"
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#include "sky/engine/platform/heap/Handle.h"
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#include "sky/engine/wtf/HashMap.h"
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#include "sky/engine/wtf/PassOwnPtr.h"
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namespace blink {
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class MutationObserverInterestGroup final {
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public:
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static PassOwnPtr<MutationObserverInterestGroup> createForChildListMutation(Node& target)
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{
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if (!target.document().hasMutationObserversOfType(MutationObserver::ChildList))
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return nullptr;
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MutationRecordDeliveryOptions oldValueFlag = 0;
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return createIfNeeded(target, MutationObserver::ChildList, oldValueFlag);
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}
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static PassOwnPtr<MutationObserverInterestGroup> createForCharacterDataMutation(Node& target)
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{
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if (!target.document().hasMutationObserversOfType(MutationObserver::CharacterData))
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return nullptr;
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return createIfNeeded(target, MutationObserver::CharacterData, MutationObserver::CharacterDataOldValue);
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}
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static PassOwnPtr<MutationObserverInterestGroup> createForAttributesMutation(Node& target, const QualifiedName& attributeName)
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{
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if (!target.document().hasMutationObserversOfType(MutationObserver::Attributes))
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return nullptr;
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return createIfNeeded(target, MutationObserver::Attributes, MutationObserver::AttributeOldValue, &attributeName);
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}
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bool isOldValueRequested();
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void enqueueMutationRecord(PassRefPtr<MutationRecord>);
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private:
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static PassOwnPtr<MutationObserverInterestGroup> createIfNeeded(Node& target, MutationObserver::MutationType, MutationRecordDeliveryOptions oldValueFlag, const QualifiedName* attributeName = 0);
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MutationObserverInterestGroup(HashMap<RawPtr<MutationObserver>, MutationRecordDeliveryOptions>& observers, MutationRecordDeliveryOptions oldValueFlag);
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bool hasOldValue(MutationRecordDeliveryOptions options) { return options & m_oldValueFlag; }
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HashMap<RawPtr<MutationObserver>, MutationRecordDeliveryOptions> m_observers;
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MutationRecordDeliveryOptions m_oldValueFlag;
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};
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}
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#endif // SKY_ENGINE_CORE_DOM_MUTATIONOBSERVERINTERESTGROUP_H_
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