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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) 2004-2017 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 "EventTargetInterfaces.h"
#include "ExceptionOr.h"
#include "ScriptWrappable.h"
#include <memory>
#include <wtf/Forward.h>
#include <wtf/Variant.h>
namespace WebCore {
class DOMWindow;
class DOMWrapperWorld;
class Node;
struct EventTargetData {
WTF_MAKE_NONCOPYABLE(EventTargetData); WTF_MAKE_FAST_ALLOCATED;
public:
EventTargetData() = default;
EventListenerMap eventListenerMap;
bool isFiringEventListeners { false };
};
enum EventTargetInterface {
#define DOM_EVENT_INTERFACE_DECLARE(name) name##EventTargetInterfaceType,
DOM_EVENT_TARGET_INTERFACES_FOR_EACH(DOM_EVENT_INTERFACE_DECLARE)
#undef DOM_EVENT_INTERFACE_DECLARE
};
class EventTarget : public ScriptWrappable {
public:
void ref() { refEventTarget(); }
void deref() { derefEventTarget(); }
virtual EventTargetInterface eventTargetInterface() const = 0;
virtual ScriptExecutionContext* scriptExecutionContext() const = 0;
virtual Node* toNode();
virtual DOMWindow* toDOMWindow();
virtual bool isMessagePort() const;
struct ListenerOptions {
ListenerOptions(bool capture = false)
: capture(capture)
{ }
bool capture;
};
struct AddEventListenerOptions : ListenerOptions {
AddEventListenerOptions(bool capture = false, bool passive = false, bool once = false)
: ListenerOptions(capture)
, passive(passive)
, once(once)
{ }
bool passive;
bool once;
};
using AddEventListenerOptionsOrBoolean = Variant<AddEventListenerOptions, bool>;
WEBCORE_EXPORT void addEventListenerForBindings(const AtomicString& eventType, RefPtr<EventListener>&&, AddEventListenerOptionsOrBoolean&&);
using ListenerOptionsOrBoolean = Variant<ListenerOptions, bool>;
WEBCORE_EXPORT void removeEventListenerForBindings(const AtomicString& eventType, RefPtr<EventListener>&&, ListenerOptionsOrBoolean&&);
WEBCORE_EXPORT ExceptionOr<bool> dispatchEventForBindings(Event&);
virtual bool addEventListener(const AtomicString& eventType, Ref<EventListener>&&, const AddEventListenerOptions& = { });
virtual bool removeEventListener(const AtomicString& eventType, EventListener&, const ListenerOptions&);
virtual void removeAllEventListeners();
virtual bool dispatchEvent(Event&);
virtual void uncaughtExceptionInEventHandler();
// Used for legacy "onevent" attributes.
bool setAttributeEventListener(const AtomicString& eventType, RefPtr<EventListener>&&, DOMWrapperWorld&);
EventListener* attributeEventListener(const AtomicString& eventType, DOMWrapperWorld&);
bool hasEventListeners() const;
bool hasEventListeners(const AtomicString& eventType) const;
bool hasCapturingEventListeners(const AtomicString& eventType);
bool hasActiveEventListeners(const AtomicString& eventType) const;
const EventListenerVector& eventListeners(const AtomicString& eventType);
bool fireEventListeners(Event&);
bool isFiringEventListeners() const;
void visitJSEventListeners(JSC::SlotVisitor&);
void invalidateJSEventListeners(JSC::JSObject*);
protected:
virtual ~EventTarget() = default;
virtual EventTargetData* eventTargetData() = 0;
virtual EventTargetData* eventTargetDataConcurrently() = 0;
virtual EventTargetData& ensureEventTargetData() = 0;
const EventTargetData* eventTargetData() const;
private:
virtual void refEventTarget() = 0;
virtual void derefEventTarget() = 0;
void fireEventListeners(Event&, EventListenerVector);
friend class EventListenerIterator;
};
class EventTargetWithInlineData : public EventTarget {
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::isFiringEventListeners() const
{
auto* data = eventTargetData();
return data && data->isFiringEventListeners;
}
inline bool EventTarget::hasEventListeners() const
{
auto* data = eventTargetData();
return data && !data->eventListenerMap.isEmpty();
}
inline bool EventTarget::hasEventListeners(const AtomicString& eventType) const
{
auto* data = eventTargetData();
return data && data->eventListenerMap.contains(eventType);
}
inline bool EventTarget::hasCapturingEventListeners(const AtomicString& eventType)
{
auto* data = eventTargetData();
return data && data->eventListenerMap.containsCapturing(eventType);
}
} // namespace WebCore
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