| /* |
| * 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 isScoped(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) |
| : Event(eventType, canBubbleArg, cancelableArg, !isScoped(eventType), monotonicallyIncreasingTime()) |
| { |
| } |
| |
| Event::Event(const AtomicString& eventType, bool canBubbleArg, bool cancelableArg, double platformTimeStamp) |
| : Event(eventType, canBubbleArg, cancelableArg, !isScoped(eventType), platformTimeStamp) |
| { |
| } |
| |
| Event::Event(const AtomicString& eventType, bool canBubbleArg, bool cancelableArg, bool composed, double platformTimeStamp) |
| : m_type(eventType) |
| , m_canBubble(canBubbleArg) |
| , m_cancelable(cancelableArg) |
| , m_composed(composed) |
| , m_propagationStopped(false) |
| , m_immediatePropagationStopped(false) |
| , m_defaultPrevented(false) |
| , m_defaultHandled(false) |
| , m_cancelBubble(false) |
| , m_wasInitialized(true) |
| , m_isTrusted(false) |
| , m_handlingPassive(false) |
| , m_eventPhase(0) |
| , m_currentTarget(nullptr) |
| , m_createTime(convertSecondsToDOMTimeStamp(currentTime())) |
| , m_platformTimeStamp(platformTimeStamp) |
| { |
| } |
| |
| Event::Event(const AtomicString& eventType, const EventInit& initializer) |
| : Event(eventType, initializer.bubbles(), initializer.cancelable(), initializer.composed(), monotonicallyIncreasingTime()) |
| { |
| } |
| |
| Event::~Event() |
| { |
| } |
| |
| bool Event::isScopedInV0() const |
| { |
| return isTrusted() && isScoped(m_type); |
| } |
| |
| 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_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) { |
| const LocalDOMWindow* window = m_eventPath ? m_eventPath->windowEventContext().window() : 0; |
| if (window) |
| window->printErrorMessage("Unable to preventDefault inside passive event listener invocation."); |
| return; |
| } |
| |
| if (m_cancelable) |
| m_defaultPrevented = 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); |
| } |
| |
| HeapVector<Member<EventTarget>> Event::pathInternal(ScriptState* scriptState, EventPathMode mode) const |
| { |
| if (m_target) |
| HostsUsingFeatures::countHostOrIsolatedWorldHumanReadableName(scriptState, *m_target, HostsUsingFeatures::Feature::EventPath); |
| |
| if (!m_currentTarget) { |
| ASSERT(m_eventPhase == Event::NONE); |
| if (!m_eventPath) { |
| // Before dispatching the event |
| return HeapVector<Member<EventTarget>>(); |
| } |
| ASSERT(!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()) { |
| ASSERT(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); |
| } |
| } |
| ASSERT_NOT_REACHED(); |
| } |
| |
| // Returns [window] for events that are directly dispatched to the window object; |
| // e.g., window.load, pageshow, etc. |
| if (LocalDOMWindow* window = m_currentTarget->toLocalDOMWindow()) |
| return HeapVector<Member<EventTarget>>(1, window); |
| |
| return HeapVector<Member<EventTarget>>(); |
| } |
| |
| EventDispatchMediator* Event::createMediator() |
| { |
| return EventDispatchMediator::create(this); |
| } |
| |
| EventTarget* Event::currentTarget() const |
| { |
| if (!m_currentTarget) |
| return nullptr; |
| Node* node = m_currentTarget->toNode(); |
| if (node && node->isSVGElement()) { |
| if (SVGElement* svgElement = toSVGElement(node)->correspondingElement()) |
| return svgElement; |
| } |
| return m_currentTarget.get(); |
| } |
| |
| double Event::timeStamp(ScriptState* scriptState) const |
| { |
| double timeStamp = 0; |
| // TODO(majidvp): Get rid of m_createTime once the flag is enabled by default; |
| if (UNLIKELY(RuntimeEnabledFeatures::hiResEventTimeStampEnabled())) { |
| // Only expose monotonic time after changing its origin to its target |
| // document's time origin. |
| if (scriptState && scriptState->domWindow()) { |
| Performance* performance = DOMWindowPerformance::performance(*scriptState->domWindow()); |
| timeStamp = performance->monotonicTimeToDOMHighResTimeStamp(m_platformTimeStamp); |
| } |
| } else { |
| timeStamp = m_createTime; |
| } |
| |
| 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 |