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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2001 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004-2021 Apple Inc. All rights reserved.
* Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
* (C) 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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.
*/
#pragma once
#include "EventListenerMap.h"
#include "EventListenerOptions.h"
#include "EventTargetInterfaces.h"
#include "ExceptionOr.h"
#include "ScriptWrappable.h"
#include <memory>
#include <variant>
#include <wtf/Forward.h>
#include <wtf/IsoMalloc.h>
#include <wtf/WeakPtr.h>
namespace JSC {
class JSValue;
class JSObject;
}
namespace WebCore {
struct AddEventListenerOptions;
class DOMWrapperWorld;
class JSEventListener;
struct EventTargetData {
WTF_MAKE_NONCOPYABLE(EventTargetData); WTF_MAKE_FAST_ALLOCATED;
public:
EventTargetData() = default;
EventListenerMap eventListenerMap;
};
class EventTarget : public ScriptWrappable, public CanMakeWeakPtr<EventTarget> {
WTF_MAKE_ISO_ALLOCATED(EventTarget);
public:
static Ref<EventTarget> create(ScriptExecutionContext&);
void ref() { refEventTarget(); }
void deref() { derefEventTarget(); }
virtual EventTargetInterface eventTargetInterface() const = 0;
virtual ScriptExecutionContext* scriptExecutionContext() const = 0;
WEBCORE_EXPORT virtual bool isNode() const;
WEBCORE_EXPORT virtual bool isPaymentRequest() const;
using AddEventListenerOptionsOrBoolean = std::variant<AddEventListenerOptions, bool>;
WEBCORE_EXPORT void addEventListenerForBindings(const AtomString& eventType, RefPtr<EventListener>&&, AddEventListenerOptionsOrBoolean&&);
using EventListenerOptionsOrBoolean = std::variant<EventListenerOptions, bool>;
WEBCORE_EXPORT void removeEventListenerForBindings(const AtomString& eventType, RefPtr<EventListener>&&, EventListenerOptionsOrBoolean&&);
WEBCORE_EXPORT ExceptionOr<bool> dispatchEventForBindings(Event&);
WEBCORE_EXPORT virtual bool addEventListener(const AtomString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&);
WEBCORE_EXPORT virtual bool removeEventListener(const AtomString& eventType, EventListener&, const EventListenerOptions& = { });
WEBCORE_EXPORT virtual void removeAllEventListeners();
WEBCORE_EXPORT virtual void dispatchEvent(Event&);
WEBCORE_EXPORT virtual void uncaughtExceptionInEventHandler();
// Used for legacy "onevent" attributes.
template<typename JSMaybeErrorEventListener>
void setAttributeEventListener(const AtomString& eventType, JSC::JSValue listener, JSC::JSObject& jsEventTarget);
bool setAttributeEventListener(const AtomString& eventType, RefPtr<EventListener>&&, DOMWrapperWorld&);
JSEventListener* attributeEventListener(const AtomString& eventType, DOMWrapperWorld&);
bool hasEventListeners() const;
bool hasEventListeners(const AtomString& eventType) const;
bool hasCapturingEventListeners(const AtomString& eventType);
bool hasActiveEventListeners(const AtomString& eventType) const;
Vector<AtomString> eventTypes() const;
const EventListenerVector& eventListeners(const AtomString& eventType);
enum class EventInvokePhase { Capturing, Bubbling };
void fireEventListeners(Event&, EventInvokePhase);
template<typename Visitor> void visitJSEventListeners(Visitor&);
void invalidateJSEventListeners(JSC::JSObject*);
const EventTargetData* eventTargetData() const;
protected:
WEBCORE_EXPORT virtual ~EventTarget();
virtual EventTargetData* eventTargetData() = 0;
virtual EventTargetData* eventTargetDataConcurrently() = 0;
virtual EventTargetData& ensureEventTargetData() = 0;
virtual void eventListenersDidChange() { }
private:
virtual void refEventTarget() = 0;
virtual void derefEventTarget() = 0;
void innerInvokeEventListeners(Event&, EventListenerVector, EventInvokePhase);
void invalidateEventListenerRegions();
};
class EventTargetWithInlineData : public EventTarget {
WTF_MAKE_ISO_ALLOCATED_EXPORT(EventTargetWithInlineData, WEBCORE_EXPORT);
protected:
EventTargetData* eventTargetData() final { return &m_eventTargetData; }
EventTargetData* eventTargetDataConcurrently() final { return &m_eventTargetData; }
EventTargetData& ensureEventTargetData() final { return m_eventTargetData; }
private:
EventTargetData m_eventTargetData;
};
inline const EventTargetData* EventTarget::eventTargetData() const
{
return const_cast<EventTarget*>(this)->eventTargetData();
}
inline bool EventTarget::hasEventListeners() const
{
auto* data = eventTargetData();
return data && !data->eventListenerMap.isEmpty();
}
inline bool EventTarget::hasEventListeners(const AtomString& eventType) const
{
auto* data = eventTargetData();
return data && data->eventListenerMap.contains(eventType);
}
inline bool EventTarget::hasCapturingEventListeners(const AtomString& eventType)
{
auto* data = eventTargetData();
return data && data->eventListenerMap.containsCapturing(eventType);
}
template<typename Visitor>
void EventTarget::visitJSEventListeners(Visitor& visitor)
{
if (auto* data = eventTargetDataConcurrently())
data->eventListenerMap.visitJSEventListeners(visitor);
}
} // namespace WebCore
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