283 lines
8.4 KiB
C++
283 lines
8.4 KiB
C++
/*
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
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* (C) 1999 Antti Koivisto (koivisto@kde.org)
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* (C) 2001 Dirk Mueller (mueller@kde.org)
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* Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
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* Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
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* (C) 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
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* Copyright (C) 2011 Andreas Kling (kling@webkit.org)
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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
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* are met:
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* 1. 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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* 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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*/
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#include "config.h"
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#include "EventListenerMap.h"
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#include "AddEventListenerOptions.h"
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#include "Event.h"
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#include "EventTarget.h"
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#include <wtf/MainThread.h>
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#include <wtf/StdLibExtras.h>
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#include <wtf/Vector.h>
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namespace WebCore {
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#ifndef NDEBUG
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void EventListenerMap::assertNoActiveIterators() const
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{
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ASSERT(!m_activeIteratorCount);
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}
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#endif
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EventListenerMap::EventListenerMap()
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{
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}
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bool EventListenerMap::containsCapturing(const AtomString& eventType) const
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{
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auto* listeners = find(eventType);
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if (!listeners)
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return false;
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for (auto& eventListener : *listeners) {
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if (eventListener->useCapture())
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return true;
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}
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return false;
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}
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bool EventListenerMap::containsActive(const AtomString& eventType) const
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{
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auto* listeners = find(eventType);
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if (!listeners)
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return false;
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for (auto& eventListener : *listeners) {
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if (!eventListener->isPassive())
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return true;
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}
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return false;
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}
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void EventListenerMap::clear()
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{
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Locker locker { m_lock };
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assertNoActiveIterators();
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for (auto& entry : m_entries) {
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for (auto& listener : *entry.second)
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listener->markAsRemoved();
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}
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m_entries.clear();
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}
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Vector<AtomString> EventListenerMap::eventTypes() const
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{
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Vector<AtomString> types;
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types.reserveInitialCapacity(m_entries.size());
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for (auto& entry : m_entries)
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types.uncheckedAppend(entry.first);
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return types;
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}
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static inline size_t findListener(const EventListenerVector& listeners, EventListener& listener, bool useCapture)
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{
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for (size_t i = 0; i < listeners.size(); ++i) {
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auto& registeredListener = listeners[i];
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if (registeredListener->callback() == listener && registeredListener->useCapture() == useCapture)
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return i;
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}
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return notFound;
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}
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void EventListenerMap::replace(const AtomString& eventType, EventListener& oldListener, Ref<EventListener>&& newListener, const RegisteredEventListener::Options& options)
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{
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Locker locker { m_lock };
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assertNoActiveIterators();
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auto* listeners = find(eventType);
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ASSERT(listeners);
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size_t index = findListener(*listeners, oldListener, options.capture);
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ASSERT(index != notFound);
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auto& registeredListener = listeners->at(index);
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registeredListener->markAsRemoved();
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registeredListener = RegisteredEventListener::create(WTFMove(newListener), options);
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}
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bool EventListenerMap::add(const AtomString& eventType, Ref<EventListener>&& listener, const RegisteredEventListener::Options& options)
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{
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Locker locker { m_lock };
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assertNoActiveIterators();
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if (auto* listeners = find(eventType)) {
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if (findListener(*listeners, listener, options.capture) != notFound)
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return false; // Duplicate listener.
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listeners->append(RegisteredEventListener::create(WTFMove(listener), options));
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return true;
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}
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auto listeners = makeUnique<EventListenerVector>();
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listeners->uncheckedAppend(RegisteredEventListener::create(WTFMove(listener), options));
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m_entries.append({ eventType, WTFMove(listeners) });
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return true;
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}
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static bool removeListenerFromVector(EventListenerVector& listeners, EventListener& listener, bool useCapture)
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{
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size_t indexOfRemovedListener = findListener(listeners, listener, useCapture);
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if (UNLIKELY(indexOfRemovedListener == notFound))
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return false;
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listeners[indexOfRemovedListener]->markAsRemoved();
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listeners.remove(indexOfRemovedListener);
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return true;
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}
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bool EventListenerMap::remove(const AtomString& eventType, EventListener& listener, bool useCapture)
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{
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Locker locker { m_lock };
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assertNoActiveIterators();
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for (unsigned i = 0; i < m_entries.size(); ++i) {
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if (m_entries[i].first == eventType) {
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bool wasRemoved = removeListenerFromVector(*m_entries[i].second, listener, useCapture);
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if (m_entries[i].second->isEmpty())
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m_entries.remove(i);
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return wasRemoved;
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}
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}
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return false;
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}
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EventListenerVector* EventListenerMap::find(const AtomString& eventType) const
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{
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for (auto& entry : m_entries) {
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if (entry.first == eventType)
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return entry.second.get();
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}
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return nullptr;
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}
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static void removeFirstListenerCreatedFromMarkup(EventListenerVector& listenerVector)
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{
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bool foundListener = listenerVector.removeFirstMatching([] (const auto& registeredListener) {
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if (registeredListener->callback().wasCreatedFromMarkup()) {
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registeredListener->markAsRemoved();
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return true;
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}
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return false;
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});
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ASSERT_UNUSED(foundListener, foundListener);
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}
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void EventListenerMap::removeFirstEventListenerCreatedFromMarkup(const AtomString& eventType)
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{
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Locker locker { m_lock };
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assertNoActiveIterators();
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for (unsigned i = 0; i < m_entries.size(); ++i) {
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if (m_entries[i].first == eventType) {
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removeFirstListenerCreatedFromMarkup(*m_entries[i].second);
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if (m_entries[i].second->isEmpty())
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m_entries.remove(i);
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return;
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}
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}
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}
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static void copyListenersNotCreatedFromMarkupToTarget(const AtomString& eventType, EventListenerVector& listenerVector, EventTarget* target)
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{
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for (auto& registeredListener : listenerVector) {
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// Event listeners created from markup have already been transfered to the shadow tree during cloning.
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if (registeredListener->callback().wasCreatedFromMarkup())
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continue;
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target->addEventListener(eventType, registeredListener->callback(), registeredListener->useCapture());
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}
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}
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void EventListenerMap::copyEventListenersNotCreatedFromMarkupToTarget(EventTarget* target)
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{
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for (auto& entry : m_entries)
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copyListenersNotCreatedFromMarkupToTarget(entry.first, *entry.second, target);
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}
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EventListenerIterator::EventListenerIterator(EventTarget* target)
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{
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ASSERT(target);
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EventTargetData* data = target->eventTargetData();
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if (!data)
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return;
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m_map = &data->eventListenerMap;
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#ifndef NDEBUG
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m_map->m_activeIteratorCount++;
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#endif
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}
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EventListenerIterator::EventListenerIterator(EventListenerMap* map)
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{
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m_map = map;
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#ifndef NDEBUG
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m_map->m_activeIteratorCount++;
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#endif
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}
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#ifndef NDEBUG
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EventListenerIterator::~EventListenerIterator()
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{
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if (m_map)
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m_map->m_activeIteratorCount--;
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}
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#endif
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EventListener* EventListenerIterator::nextListener()
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{
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if (!m_map)
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return nullptr;
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for (; m_entryIndex < m_map->m_entries.size(); ++m_entryIndex) {
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EventListenerVector& listeners = *m_map->m_entries[m_entryIndex].second;
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if (m_index < listeners.size())
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return &listeners[m_index++]->callback();
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m_index = 0;
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}
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return nullptr;
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}
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} // namespace WebCore
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