| /* |
| * Copyright (C) 2001 Peter Kelly (pmk@post.com) |
| * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de) |
| * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com) |
| * Copyright (C) 2003, 2005, 2006, 2008 Apple Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "core/events/Event.h" |
| |
| #include "core/dom/StaticNodeList.h" |
| #include "core/events/EventDispatchMediator.h" |
| #include "core/events/EventTarget.h" |
| #include "core/frame/HostsUsingFeatures.h" |
| #include "core/frame/UseCounter.h" |
| #include "core/svg/SVGElement.h" |
| #include "core/timing/DOMWindowPerformance.h" |
| #include "core/timing/Performance.h" |
| #include "wtf/CurrentTime.h" |
| |
| namespace blink { |
| |
| static bool isEventTypeScopedInV0(const AtomicString& eventType) { |
| // WebKit never allowed selectstart event to cross the the shadow DOM |
| // boundary. Changing this breaks existing sites. |
| // See https://bugs.webkit.org/show_bug.cgi?id=52195 for details. |
| return eventType == EventTypeNames::abort || |
| eventType == EventTypeNames::change || |
| eventType == EventTypeNames::error || |
| eventType == EventTypeNames::load || |
| eventType == EventTypeNames::reset || |
| eventType == EventTypeNames::resize || |
| eventType == EventTypeNames::scroll || |
| eventType == EventTypeNames::select || |
| eventType == EventTypeNames::selectstart || |
| eventType == EventTypeNames::slotchange; |
| } |
| |
| Event::Event() : Event("", false, false) { |
| m_wasInitialized = false; |
| } |
| |
| Event::Event(const AtomicString& eventType, |
| bool canBubbleArg, |
| bool cancelableArg, |
| double platformTimeStamp) |
| : Event(eventType, |
| canBubbleArg, |
| cancelableArg, |
| ComposedMode::Scoped, |
| platformTimeStamp) {} |
| |
| Event::Event(const AtomicString& eventType, |
| bool canBubbleArg, |
| bool cancelableArg, |
| ComposedMode composedMode) |
| : Event(eventType, |
| canBubbleArg, |
| cancelableArg, |
| composedMode, |
| monotonicallyIncreasingTime()) {} |
| |
| Event::Event(const AtomicString& eventType, |
| bool canBubbleArg, |
| bool cancelableArg, |
| ComposedMode composedMode, |
| double platformTimeStamp) |
| : m_type(eventType), |
| m_canBubble(canBubbleArg), |
| m_cancelable(cancelableArg), |
| m_composed(composedMode == ComposedMode::Composed), |
| m_isEventTypeScopedInV0(isEventTypeScopedInV0(eventType)), |
| m_propagationStopped(false), |
| m_immediatePropagationStopped(false), |
| m_defaultPrevented(false), |
| m_defaultHandled(false), |
| m_cancelBubble(false), |
| m_wasInitialized(true), |
| m_isTrusted(false), |
| m_preventDefaultCalledOnUncancelableEvent(false), |
| m_handlingPassive(PassiveMode::NotPassiveDefault), |
| m_eventPhase(0), |
| m_currentTarget(nullptr), |
| m_platformTimeStamp(platformTimeStamp) {} |
| |
| Event::Event(const AtomicString& eventType, const EventInit& initializer) |
| : Event(eventType, |
| initializer.bubbles(), |
| initializer.cancelable(), |
| initializer.composed() ? ComposedMode::Composed |
| : ComposedMode::Scoped, |
| monotonicallyIncreasingTime()) {} |
| |
| Event::~Event() {} |
| |
| bool Event::isScopedInV0() const { |
| return isTrusted() && m_isEventTypeScopedInV0; |
| } |
| |
| void Event::initEvent(const AtomicString& eventTypeArg, |
| bool canBubbleArg, |
| bool cancelableArg) { |
| initEvent(eventTypeArg, canBubbleArg, cancelableArg, nullptr); |
| } |
| |
| void Event::initEvent(const AtomicString& eventTypeArg, |
| bool canBubbleArg, |
| bool cancelableArg, |
| EventTarget* relatedTarget) { |
| if (isBeingDispatched()) |
| return; |
| |
| m_wasInitialized = true; |
| m_propagationStopped = false; |
| m_immediatePropagationStopped = false; |
| m_defaultPrevented = false; |
| m_isTrusted = false; |
| m_preventDefaultCalledOnUncancelableEvent = false; |
| |
| m_type = eventTypeArg; |
| m_canBubble = canBubbleArg; |
| m_cancelable = cancelableArg; |
| } |
| |
| bool Event::legacyReturnValue(ExecutionContext* executionContext) const { |
| bool returnValue = !defaultPrevented(); |
| if (returnValue) |
| UseCounter::count(executionContext, UseCounter::EventGetReturnValueTrue); |
| else |
| UseCounter::count(executionContext, UseCounter::EventGetReturnValueFalse); |
| return returnValue; |
| } |
| |
| void Event::setLegacyReturnValue(ExecutionContext* executionContext, |
| bool returnValue) { |
| if (returnValue) |
| UseCounter::count(executionContext, UseCounter::EventSetReturnValueTrue); |
| else |
| UseCounter::count(executionContext, UseCounter::EventSetReturnValueFalse); |
| setDefaultPrevented(!returnValue); |
| } |
| |
| const AtomicString& Event::interfaceName() const { |
| return EventNames::Event; |
| } |
| |
| bool Event::hasInterface(const AtomicString& name) const { |
| return interfaceName() == name; |
| } |
| |
| bool Event::isUIEvent() const { |
| return false; |
| } |
| |
| bool Event::isMouseEvent() const { |
| return false; |
| } |
| |
| bool Event::isFocusEvent() const { |
| return false; |
| } |
| |
| bool Event::isKeyboardEvent() const { |
| return false; |
| } |
| |
| bool Event::isTouchEvent() const { |
| return false; |
| } |
| |
| bool Event::isGestureEvent() const { |
| return false; |
| } |
| |
| bool Event::isWheelEvent() const { |
| return false; |
| } |
| |
| bool Event::isRelatedEvent() const { |
| return false; |
| } |
| |
| bool Event::isPointerEvent() const { |
| return false; |
| } |
| |
| bool Event::isInputEvent() const { |
| return false; |
| } |
| |
| bool Event::isDragEvent() const { |
| return false; |
| } |
| |
| bool Event::isClipboardEvent() const { |
| return false; |
| } |
| |
| bool Event::isBeforeTextInsertedEvent() const { |
| return false; |
| } |
| |
| bool Event::isBeforeUnloadEvent() const { |
| return false; |
| } |
| |
| void Event::preventDefault() { |
| if (m_handlingPassive != PassiveMode::NotPassive && |
| m_handlingPassive != PassiveMode::NotPassiveDefault) { |
| m_preventDefaultCalledDuringPassive = true; |
| |
| const LocalDOMWindow* window = |
| m_eventPath ? m_eventPath->windowEventContext().window() : 0; |
| if (window) { |
| const char* devToolsMsg = nullptr; |
| switch (m_handlingPassive) { |
| case PassiveMode::NotPassive: |
| case PassiveMode::NotPassiveDefault: |
| NOTREACHED(); |
| break; |
| case PassiveMode::Passive: |
| case PassiveMode::PassiveDefault: |
| devToolsMsg = |
| "Unable to preventDefault inside passive event listener " |
| "invocation."; |
| break; |
| case PassiveMode::PassiveForcedDocumentLevel: |
| devToolsMsg = |
| "Unable to preventDefault inside passive event listener due to " |
| "target being treated as passive. See " |
| "https://www.chromestatus.com/features/5093566007214080"; |
| break; |
| } |
| if (devToolsMsg) |
| window->printErrorMessage(devToolsMsg); |
| } |
| return; |
| } |
| |
| if (m_cancelable) |
| m_defaultPrevented = true; |
| else |
| m_preventDefaultCalledOnUncancelableEvent = true; |
| } |
| |
| void Event::setTarget(EventTarget* target) { |
| if (m_target == target) |
| return; |
| |
| m_target = target; |
| if (m_target) |
| receivedTarget(); |
| } |
| |
| void Event::receivedTarget() {} |
| |
| void Event::setUnderlyingEvent(Event* ue) { |
| // Prohibit creation of a cycle -- just do nothing in that case. |
| for (Event* e = ue; e; e = e->underlyingEvent()) |
| if (e == this) |
| return; |
| m_underlyingEvent = ue; |
| } |
| |
| void Event::initEventPath(Node& node) { |
| if (!m_eventPath) { |
| m_eventPath = new EventPath(node, this); |
| } else { |
| m_eventPath->initializeWith(node, this); |
| } |
| } |
| |
| HeapVector<Member<EventTarget>> Event::path(ScriptState* scriptState) const { |
| return pathInternal(scriptState, NonEmptyAfterDispatch); |
| } |
| |
| HeapVector<Member<EventTarget>> Event::composedPath( |
| ScriptState* scriptState) const { |
| return pathInternal(scriptState, EmptyAfterDispatch); |
| } |
| |
| void Event::setHandlingPassive(PassiveMode mode) { |
| m_handlingPassive = mode; |
| m_preventDefaultCalledDuringPassive = false; |
| } |
| |
| HeapVector<Member<EventTarget>> Event::pathInternal(ScriptState* scriptState, |
| EventPathMode mode) const { |
| if (m_target) |
| HostsUsingFeatures::countHostOrIsolatedWorldHumanReadableName( |
| scriptState, *m_target, HostsUsingFeatures::Feature::EventPath); |
| |
| if (!m_currentTarget) { |
| DCHECK_EQ(Event::kNone, m_eventPhase); |
| if (!m_eventPath) { |
| // Before dispatching the event |
| return HeapVector<Member<EventTarget>>(); |
| } |
| DCHECK(!m_eventPath->isEmpty()); |
| // After dispatching the event |
| if (mode == EmptyAfterDispatch) |
| return HeapVector<Member<EventTarget>>(); |
| return m_eventPath->last().treeScopeEventContext().ensureEventPath( |
| *m_eventPath); |
| } |
| |
| if (Node* node = m_currentTarget->toNode()) { |
| DCHECK(m_eventPath); |
| size_t eventPathSize = m_eventPath->size(); |
| for (size_t i = 0; i < eventPathSize; ++i) { |
| if (node == (*m_eventPath)[i].node()) { |
| return (*m_eventPath)[i].treeScopeEventContext().ensureEventPath( |
| *m_eventPath); |
| } |
| } |
| NOTREACHED(); |
| } |
| |
| if (LocalDOMWindow* window = m_currentTarget->toLocalDOMWindow()) { |
| if (m_eventPath && !m_eventPath->isEmpty()) { |
| return m_eventPath->topNodeEventContext() |
| .treeScopeEventContext() |
| .ensureEventPath(*m_eventPath); |
| } |
| return HeapVector<Member<EventTarget>>(1, window); |
| } |
| |
| return HeapVector<Member<EventTarget>>(); |
| } |
| |
| EventDispatchMediator* Event::createMediator() { |
| return EventDispatchMediator::create(this); |
| } |
| |
| double Event::timeStamp(ScriptState* scriptState) const { |
| double timeStamp = 0; |
| if (scriptState && scriptState->domWindow()) { |
| Performance* performance = |
| DOMWindowPerformance::performance(*scriptState->domWindow()); |
| timeStamp = |
| performance->monotonicTimeToDOMHighResTimeStamp(m_platformTimeStamp); |
| } |
| |
| return timeStamp; |
| } |
| |
| void Event::setCancelBubble(ExecutionContext* context, bool cancel) { |
| if (!m_cancelBubble && cancel) |
| UseCounter::count(context, UseCounter::EventCancelBubbleWasChangedToTrue); |
| else if (m_cancelBubble && !cancel) |
| UseCounter::count(context, UseCounter::EventCancelBubbleWasChangedToFalse); |
| m_cancelBubble = cancel; |
| } |
| |
| DEFINE_TRACE(Event) { |
| visitor->trace(m_currentTarget); |
| visitor->trace(m_target); |
| visitor->trace(m_underlyingEvent); |
| visitor->trace(m_eventPath); |
| } |
| |
| } // namespace blink |