164 lines
6.3 KiB
C++
164 lines
6.3 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) 2004-2021 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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*
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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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#pragma once
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#include "EventListenerMap.h"
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#include "EventListenerOptions.h"
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#include "EventTargetInterfaces.h"
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#include "ExceptionOr.h"
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#include "ScriptWrappable.h"
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#include <memory>
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#include <wtf/Forward.h>
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#include <wtf/IsoMalloc.h>
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#include <wtf/Variant.h>
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#include <wtf/WeakPtr.h>
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namespace WebCore {
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struct AddEventListenerOptions;
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class DOMWrapperWorld;
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struct EventTargetData {
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WTF_MAKE_NONCOPYABLE(EventTargetData); WTF_MAKE_FAST_ALLOCATED;
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public:
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EventTargetData() = default;
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EventListenerMap eventListenerMap;
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bool isFiringEventListeners { false };
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};
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class EventTarget : public ScriptWrappable, public CanMakeWeakPtr<EventTarget> {
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WTF_MAKE_ISO_ALLOCATED(EventTarget);
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public:
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static Ref<EventTarget> create(ScriptExecutionContext&);
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void ref() { refEventTarget(); }
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void deref() { derefEventTarget(); }
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virtual EventTargetInterface eventTargetInterface() const = 0;
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virtual ScriptExecutionContext* scriptExecutionContext() const = 0;
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WEBCORE_EXPORT virtual bool isNode() const;
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WEBCORE_EXPORT virtual bool isPaymentRequest() const;
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using AddEventListenerOptionsOrBoolean = Variant<AddEventListenerOptions, bool>;
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WEBCORE_EXPORT void addEventListenerForBindings(const AtomString& eventType, RefPtr<EventListener>&&, AddEventListenerOptionsOrBoolean&&);
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using EventListenerOptionsOrBoolean = Variant<EventListenerOptions, bool>;
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WEBCORE_EXPORT void removeEventListenerForBindings(const AtomString& eventType, RefPtr<EventListener>&&, EventListenerOptionsOrBoolean&&);
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WEBCORE_EXPORT ExceptionOr<bool> dispatchEventForBindings(Event&);
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WEBCORE_EXPORT virtual bool addEventListener(const AtomString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&);
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WEBCORE_EXPORT virtual bool removeEventListener(const AtomString& eventType, EventListener&, const EventListenerOptions& = { });
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WEBCORE_EXPORT virtual void removeAllEventListeners();
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WEBCORE_EXPORT virtual void dispatchEvent(Event&);
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WEBCORE_EXPORT virtual void uncaughtExceptionInEventHandler();
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// Used for legacy "onevent" attributes.
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bool setAttributeEventListener(const AtomString& eventType, RefPtr<EventListener>&&, DOMWrapperWorld&);
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EventListener* attributeEventListener(const AtomString& eventType, DOMWrapperWorld&);
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bool hasEventListeners() const;
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bool hasEventListeners(const AtomString& eventType) const;
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bool hasCapturingEventListeners(const AtomString& eventType);
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bool hasActiveEventListeners(const AtomString& eventType) const;
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Vector<AtomString> eventTypes();
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const EventListenerVector& eventListeners(const AtomString& eventType);
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enum class EventInvokePhase { Capturing, Bubbling };
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void fireEventListeners(Event&, EventInvokePhase);
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bool isFiringEventListeners() const;
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template<typename Visitor> void visitJSEventListeners(Visitor&);
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void invalidateJSEventListeners(JSC::JSObject*);
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const EventTargetData* eventTargetData() const;
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protected:
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virtual ~EventTarget() = default;
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virtual EventTargetData* eventTargetData() = 0;
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virtual EventTargetData* eventTargetDataConcurrently() = 0;
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virtual EventTargetData& ensureEventTargetData() = 0;
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virtual void eventListenersDidChange() { }
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private:
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virtual void refEventTarget() = 0;
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virtual void derefEventTarget() = 0;
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void innerInvokeEventListeners(Event&, EventListenerVector, EventInvokePhase);
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void invalidateEventListenerRegions();
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friend class EventListenerIterator;
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};
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class EventTargetWithInlineData : public EventTarget {
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WTF_MAKE_ISO_ALLOCATED_EXPORT(EventTargetWithInlineData, WEBCORE_EXPORT);
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protected:
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EventTargetData* eventTargetData() final { return &m_eventTargetData; }
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EventTargetData* eventTargetDataConcurrently() final { return &m_eventTargetData; }
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EventTargetData& ensureEventTargetData() final { return m_eventTargetData; }
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private:
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EventTargetData m_eventTargetData;
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};
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inline const EventTargetData* EventTarget::eventTargetData() const
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{
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return const_cast<EventTarget*>(this)->eventTargetData();
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}
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inline bool EventTarget::isFiringEventListeners() const
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{
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auto* data = eventTargetData();
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return data && data->isFiringEventListeners;
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}
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inline bool EventTarget::hasEventListeners() const
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{
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auto* data = eventTargetData();
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return data && !data->eventListenerMap.isEmpty();
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}
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inline bool EventTarget::hasEventListeners(const AtomString& eventType) const
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{
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auto* data = eventTargetData();
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return data && data->eventListenerMap.contains(eventType);
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}
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inline bool EventTarget::hasCapturingEventListeners(const AtomString& eventType)
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{
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auto* data = eventTargetData();
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return data && data->eventListenerMap.containsCapturing(eventType);
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}
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} // namespace WebCore
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