85 lines
2.8 KiB
C++
85 lines
2.8 KiB
C++
/*
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* Copyright (C) 2010 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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#include "config.h"
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#include "ScopedEventQueue.h"
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#include "Event.h"
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#include "Node.h"
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#include <wtf/NeverDestroyed.h>
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namespace WebCore {
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ScopedEventQueue& ScopedEventQueue::singleton()
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{
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static NeverDestroyed<ScopedEventQueue> scopedEventQueue;
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return scopedEventQueue;
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}
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void ScopedEventQueue::enqueueEvent(Ref<Event>&& event)
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{
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ASSERT(is<Node>(event->target()));
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auto& target = downcast<Node>(*event->target());
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ScopedEvent scopedEvent = { WTFMove(event), target };
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if (m_scopingLevel)
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m_queuedEvents.append(WTFMove(scopedEvent));
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else
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dispatchEvent(scopedEvent);
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}
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void ScopedEventQueue::dispatchEvent(const ScopedEvent& event) const
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{
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if (event.event->eventInterface() == MutationEventInterfaceType && event.target->isInShadowTree())
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return;
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event.target->dispatchEvent(event.event);
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}
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void ScopedEventQueue::dispatchAllEvents()
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{
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auto queuedEvents = std::exchange(m_queuedEvents, { });
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for (auto& queuedEvent : queuedEvents)
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dispatchEvent(queuedEvent);
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}
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void ScopedEventQueue::incrementScopingLevel()
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{
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++m_scopingLevel;
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}
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void ScopedEventQueue::decrementScopingLevel()
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{
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ASSERT(m_scopingLevel);
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--m_scopingLevel;
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if (!m_scopingLevel)
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dispatchAllEvents();
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}
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}
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