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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 "ScriptWrappable.h"
#include <memory>
#include <wtf/CheckedPtr.h>
#include <wtf/Forward.h>
#include <wtf/TZoneMalloc.h>
#include <wtf/WeakPtr.h>
#include <wtf/WeakPtrImpl.h>
namespace JSC {
class JSValue;
class JSObject;
}
namespace WebCore {
enum class EventTargetInterfaceType : uint8_t;
class DOMWrapperWorld;
class EventTarget;
class JSEventListener;
struct AddEventListenerOptions;
template<typename> class ExceptionOr;
struct EventTargetData {
WTF_MAKE_TZONE_ALLOCATED(EventTargetData);
WTF_MAKE_NONCOPYABLE(EventTargetData);
public:
EventTargetData() = default;
void clear()
{
eventListenerMap.clearEntriesForTearDown();
}
EventListenerMap eventListenerMap;
};
// Do not make WeakPtrImplWithEventTargetData a derived class of DefaultWeakPtrImpl to catch the bug which uses incorrect impl class.
class WeakPtrImplWithEventTargetData final : public WTF::WeakPtrImplBase<WeakPtrImplWithEventTargetData> {
public:
EventTargetData& eventTargetData() { return m_eventTargetData; }
const EventTargetData& eventTargetData() const { return m_eventTargetData; }
template<typename T> WeakPtrImplWithEventTargetData(T* ptr) : WTF::WeakPtrImplBase<WeakPtrImplWithEventTargetData>(ptr) { }
private:
EventTargetData m_eventTargetData;
};
class WEBCORE_EXPORT EventTarget : public ScriptWrappable, public CanMakeWeakPtrWithBitField<EventTarget, WeakPtrFactoryInitialization::Lazy, WeakPtrImplWithEventTargetData> {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(EventTarget);
public:
static Ref<EventTarget> create(ScriptExecutionContext&);
inline void ref(); // Defined in EventTargetInlines.h.
inline void deref(); // Defined in EventTargetInlines.h.
virtual enum EventTargetInterfaceType eventTargetInterface() const = 0;
virtual ScriptExecutionContext* scriptExecutionContext() const = 0;
virtual bool isPaymentRequest() const;
using AddEventListenerOptionsOrBoolean = Variant<AddEventListenerOptions, bool>;
void addEventListenerForBindings(const AtomString& eventType, RefPtr<EventListener>&&, AddEventListenerOptionsOrBoolean&&);
using EventListenerOptionsOrBoolean = Variant<EventListenerOptions, bool>;
void removeEventListenerForBindings(const AtomString& eventType, RefPtr<EventListener>&&, EventListenerOptionsOrBoolean&&);
ExceptionOr<bool> dispatchEventForBindings(Event&);
virtual bool addEventListener(const AtomString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&);
virtual bool removeEventListener(const AtomString& eventType, EventListener&, const EventListenerOptions& = { });
virtual void removeAllEventListeners();
virtual void dispatchEvent(Event&);
virtual void uncaughtExceptionInEventHandler();
static const AtomString& legacyTypeForEvent(const Event&);
// 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&);
RefPtr<JSEventListener> attributeEventListener(const AtomString& eventType, DOMWrapperWorld&);
bool hasEventListeners() const;
bool hasEventListeners(const AtomString& eventType) const;
bool hasAnyEventListeners(Vector<AtomString> eventTypes) 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>
inline void visitJSEventListeners(Visitor&);
void invalidateJSEventListeners(JSC::JSObject*);
inline const EventTargetData* eventTargetData() const;
inline EventTargetData* eventTargetData();
inline EventTargetData* eventTargetDataConcurrently();
template<typename CallbackType>
inline void enumerateEventListenerTypes(NOESCAPE const CallbackType&) const;
template<typename CallbackType>
inline bool containsMatchingEventListener(NOESCAPE const CallbackType&) const;
bool hasEventTargetData() const { return hasEventTargetFlag(EventTargetFlag::HasEventTargetData); }
bool isNode() const { return hasEventTargetFlag(EventTargetFlag::IsNode); }
bool isInGCReacheableRefMap() const { return hasEventTargetFlag(EventTargetFlag::IsInGCReachableRefMap); }
void setIsInGCReacheableRefMap(bool flag) { setEventTargetFlag(EventTargetFlag::IsInGCReachableRefMap, flag); }
bool hasValidQuerySelectorAllResults() const { return hasEventTargetFlag(EventTargetFlag::HasValidQuerySelectorAllResults); }
void setHasValidQuerySelectorAllResults(bool flag) { setEventTargetFlag(EventTargetFlag::HasValidQuerySelectorAllResults, flag); }
protected:
enum ConstructNodeTag { ConstructNode };
EventTarget() = default;
EventTarget(ConstructNodeTag)
{
setEventTargetFlag(EventTargetFlag::IsNode, true);
}
virtual ~EventTarget();
// Flags for ownership & relationship.
enum class EventTargetFlag : uint16_t {
HasEventTargetData = 1 << 0,
IsNode = 1 << 1,
IsInGCReachableRefMap = 1 << 2,
// Node bits
IsConnected = 1 << 3,
IsInShadowTree = 1 << 4,
HasBeenInUserAgentShadowTree = 1 << 5,
HasValidQuerySelectorAllResults = 1 << 6,
// Element bits
HasSyntheticAttrChildNodes = 1 << 7,
HasDuplicateAttribute = 1 << 8,
HasLangAttr = 1 << 9,
HasXMLLangAttr = 1 << 10,
HasFormAssociatedCustomElementInterface = 1 << 11,
HasShadowRootContainingSlots = 1 << 12,
IsInTopLayer = 1 << 13,
// 1-bit free
// SVGElement bits
HasPendingResources = 1 << 15,
};
EventTargetData& ensureEventTargetData();
virtual void eventListenersDidChange() { }
bool hasEventTargetFlag(EventTargetFlag flag) const { return weakPtrFactory().bitfield() & enumToUnderlyingType(flag); }
void setEventTargetFlag(EventTargetFlag, bool = true);
void clearEventTargetFlag(EventTargetFlag flag) { setEventTargetFlag(flag, false); }
private:
virtual void refEventTarget() = 0;
virtual void derefEventTarget() = 0;
void innerInvokeEventListeners(Event&, EventListenerVector, EventInvokePhase);
};
inline void EventTarget::setEventTargetFlag(EventTargetFlag flag, bool value)
{
auto flags = OptionSet<EventTargetFlag>::fromRaw(weakPtrFactory().bitfield());
flags.set(flag, value);
weakPtrFactory().setBitfield(flags.toRaw());
}
} // namespace WebCore
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