third_party/WebKit/Source/core/events/EventDispatcher.cpp - chromium/src - Git at Google

 /*
  * 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, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2011 Google 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/EventDispatcher.h"

 #include "core/dom/ContainerNode.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/events/EventDispatchMediator.h"
 #include "core/events/MouseEvent.h"
 #include "core/events/ScopedEventQueue.h"
 #include "core/events/WindowEventContext.h"
 #include "core/frame/Deprecation.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "core/frame/Settings.h"
 #include "core/frame/UseCounter.h"
 #include "core/html/HTMLElement.h"
 #include "core/inspector/InspectorTraceEvents.h"
 #include "platform/EventDispatchForbiddenScope.h"
 #include "platform/TraceEvent.h"
 #include "wtf/RefPtr.h"

 namespace blink {

 DispatchEventResult EventDispatcher::dispatchEvent(Node& node, EventDispatchMediator* mediator)
 {
     TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("blink.debug"), "EventDispatcher::dispatchEvent");
 #if DCHECK_IS_ON()
     DCHECK(!EventDispatchForbiddenScope::isEventDispatchForbidden());
 #endif
     EventDispatcher dispatcher(node, &mediator->event());
     return mediator->dispatchEvent(dispatcher);
 }

 EventDispatcher::EventDispatcher(Node& node, Event* event)
     : m_node(node)
     , m_event(event)
 {
     DCHECK(m_event.get());
     m_view = node.document().view();
     m_event->initEventPath(*m_node);
 }

 void EventDispatcher::dispatchScopedEvent(Node& node, EventDispatchMediator* mediator)
 {
     // We need to set the target here because it can go away by the time we actually fire the event.
     mediator->event().setTarget(EventPath::eventTargetRespectingTargetRules(node));
     ScopedEventQueue::instance()->enqueueEventDispatchMediator(mediator);
 }

 void EventDispatcher::dispatchSimulatedClick(Node& node, Event* underlyingEvent, SimulatedClickMouseEventOptions mouseEventOptions, SimulatedClickCreationScope creationScope)
 {
     // This persistent vector doesn't cause leaks, because added Nodes are removed
     // before dispatchSimulatedClick() returns. This vector is here just to prevent
     // the code from running into an infinite recursion of dispatchSimulatedClick().
     DEFINE_STATIC_LOCAL(HeapHashSet<Member<Node>>, nodesDispatchingSimulatedClicks, (new HeapHashSet<Member<Node>>));

     if (isDisabledFormControl(&node))
         return;

     if (nodesDispatchingSimulatedClicks.contains(&node))
         return;

     nodesDispatchingSimulatedClicks.add(&node);

     if (mouseEventOptions == SendMouseOverUpDownEvents)
         EventDispatcher(node, MouseEvent::create(EventTypeNames::mouseover, node.document().domWindow(), underlyingEvent, creationScope)).dispatch();

     if (mouseEventOptions != SendNoEvents) {
         EventDispatcher(node, MouseEvent::create(EventTypeNames::mousedown, node.document().domWindow(), underlyingEvent, creationScope)).dispatch();
         node.setActive(true);
         EventDispatcher(node, MouseEvent::create(EventTypeNames::mouseup, node.document().domWindow(), underlyingEvent, creationScope)).dispatch();
     }
     // Some elements (e.g. the color picker) may set active state to true before
     // calling this method and expect the state to be reset during the call.
     node.setActive(false);

     // always send click
     EventDispatcher(node, MouseEvent::create(EventTypeNames::click, node.document().domWindow(), underlyingEvent, creationScope)).dispatch();

     nodesDispatchingSimulatedClicks.remove(&node);
 }

 DispatchEventResult EventDispatcher::dispatch()
 {
     TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("blink.debug"), "EventDispatcher::dispatch");

 #if DCHECK_IS_ON()
     DCHECK(!m_eventDispatched);
     m_eventDispatched = true;
 #endif
     if (event().eventPath().isEmpty()) {
         // eventPath() can be empty if event path is shrinked by relataedTarget retargeting.
         return DispatchEventResult::NotCanceled;
     }
     m_event->eventPath().ensureWindowEventContext();

     m_event->setTarget(EventPath::eventTargetRespectingTargetRules(*m_node));
 #if DCHECK_IS_ON()
     DCHECK(!EventDispatchForbiddenScope::isEventDispatchForbidden());
 #endif
     DCHECK(m_event->target());
     TRACE_EVENT1("devtools.timeline", "EventDispatch", "data", InspectorEventDispatchEvent::data(*m_event));
     EventDispatchHandlingState* preDispatchEventHandlerResult = nullptr;
     if (dispatchEventPreProcess(preDispatchEventHandlerResult) == ContinueDispatching) {
         if (dispatchEventAtCapturing() == ContinueDispatching) {
             if (dispatchEventAtTarget() == ContinueDispatching)
                 dispatchEventAtBubbling();
         }
     }
     dispatchEventPostProcess(preDispatchEventHandlerResult);

     // Ensure that after event dispatch, the event's target object is the
     // outermost shadow DOM boundary.
     m_event->setTarget(m_event->eventPath().windowEventContext().target());
     m_event->setCurrentTarget(nullptr);
     TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "UpdateCounters", TRACE_EVENT_SCOPE_THREAD, "data", InspectorUpdateCountersEvent::data());

     return EventTarget::dispatchEventResult(*m_event);
 }

 inline EventDispatchContinuation EventDispatcher::dispatchEventPreProcess(EventDispatchHandlingState*& preDispatchEventHandlerResult)
 {
     // Give the target node a chance to do some work before DOM event handlers get a crack.
     preDispatchEventHandlerResult = m_node->preDispatchEventHandler(m_event.get());
     return (m_event->eventPath().isEmpty() || m_event->propagationStopped()) ? DoneDispatching : ContinueDispatching;
 }

 inline EventDispatchContinuation EventDispatcher::dispatchEventAtCapturing()
 {
     // Trigger capturing event handlers, starting at the top and working our way down.
     m_event->setEventPhase(Event::kCapturingPhase);

     if (m_event->eventPath().windowEventContext().handleLocalEvents(*m_event) && m_event->propagationStopped())
         return DoneDispatching;

     for (size_t i = m_event->eventPath().size() - 1; i > 0; --i) {
         const NodeEventContext& eventContext = m_event->eventPath()[i];
         if (eventContext.currentTargetSameAsTarget())
             continue;
         eventContext.handleLocalEvents(*m_event);
         if (m_event->propagationStopped())
             return DoneDispatching;
     }

     return ContinueDispatching;
 }

 inline EventDispatchContinuation EventDispatcher::dispatchEventAtTarget()
 {
     m_event->setEventPhase(Event::kAtTarget);
     m_event->eventPath()[0].handleLocalEvents(*m_event);
     return m_event->propagationStopped() ? DoneDispatching : ContinueDispatching;
 }

 inline void EventDispatcher::dispatchEventAtBubbling()
 {
     // Trigger bubbling event handlers, starting at the bottom and working our way up.
     size_t size = m_event->eventPath().size();
     for (size_t i = 1; i < size; ++i) {
         const NodeEventContext& eventContext = m_event->eventPath()[i];
         if (eventContext.currentTargetSameAsTarget()) {
             m_event->setEventPhase(Event::kAtTarget);
         } else if (m_event->bubbles() && !m_event->cancelBubble()) {
             m_event->setEventPhase(Event::kBubblingPhase);
         } else {
             if (m_event->bubbles() && m_event->cancelBubble() && eventContext.node() && eventContext.node()->hasEventListeners(m_event->type()))
                 UseCounter::count(eventContext.node()->document(), UseCounter::EventCancelBubbleAffected);
             continue;
         }
         eventContext.handleLocalEvents(*m_event);
         if (m_event->propagationStopped())
             return;
     }
     if (m_event->bubbles() && !m_event->cancelBubble()) {
         m_event->setEventPhase(Event::kBubblingPhase);
         m_event->eventPath().windowEventContext().handleLocalEvents(*m_event);
     } else if (m_event->bubbles() && m_event->eventPath().windowEventContext().window() && m_event->eventPath().windowEventContext().window()->hasEventListeners(m_event->type())) {
         UseCounter::count(m_event->eventPath().windowEventContext().window()->getExecutionContext(), UseCounter::EventCancelBubbleAffected);
     }
 }

 inline void EventDispatcher::dispatchEventPostProcess(EventDispatchHandlingState* preDispatchEventHandlerResult)
 {
     m_event->setTarget(EventPath::eventTargetRespectingTargetRules(*m_node));
     m_event->setCurrentTarget(nullptr);
     m_event->setEventPhase(0);

     // Pass the data from the preDispatchEventHandler to the postDispatchEventHandler.
     m_node->postDispatchEventHandler(m_event.get(), preDispatchEventHandlerResult);

     bool isClick = m_event->isMouseEvent() && toMouseEvent(*m_event).type() == EventTypeNames::click;
     if (isClick) {
         // Fire an accessibility event indicating a node was clicked on.  This is safe if m_event->target()->toNode() returns null.
         if (AXObjectCache* cache = m_node->document().existingAXObjectCache())
             cache->handleClicked(m_event->target()->toNode());
     }

     // The DOM Events spec says that events dispatched by JS (other than "click")
     // should not have their default handlers invoked.
     bool isTrustedOrClick = !RuntimeEnabledFeatures::trustedEventsDefaultActionEnabled() || m_event->isTrusted() || isClick;

     // For Android WebView (distinguished by wideViewportQuirkEnabled)
     // enable untrusted events for mouse down on select elements because
     // fastclick.js seems to generate these. crbug.com/642698
     // TODO(dtapuska): Change this to a target SDK quirk crbug.com/643705
     if (!isTrustedOrClick && m_event->isMouseEvent() && m_event->type() == EventTypeNames::mousedown && isHTMLSelectElement(*m_node)) {
         if (Settings* settings = m_node->document().settings()) {
             isTrustedOrClick = settings->wideViewportQuirkEnabled();
         }
     }

     // Call default event handlers. While the DOM does have a concept of preventing
     // default handling, the detail of which handlers are called is an internal
     // implementation detail and not part of the DOM.
     if (!m_event->defaultPrevented() && !m_event->defaultHandled() && isTrustedOrClick) {
         // Non-bubbling events call only one default event handler, the one for the target.
         m_node->willCallDefaultEventHandler(*m_event);
         m_node->defaultEventHandler(m_event.get());
         DCHECK(!m_event->defaultPrevented());
         // For bubbling events, call default event handlers on the same targets in the
         // same order as the bubbling phase.
         if (!m_event->defaultHandled() && m_event->bubbles()) {
             size_t size = m_event->eventPath().size();
             for (size_t i = 1; i < size; ++i) {
                 m_event->eventPath()[i].node()->willCallDefaultEventHandler(*m_event);
                 m_event->eventPath()[i].node()->defaultEventHandler(m_event.get());
                 DCHECK(!m_event->defaultPrevented());
                 if (m_event->defaultHandled())
                     break;
             }
         }
     }

     // Track the usage of sending a mousedown event to a select element to force
     // it to open. This measures a possible breakage of not allowing untrusted
     // events to open select boxes.
     if (!m_event->isTrusted() && m_event->isMouseEvent() && m_event->type() == EventTypeNames::mousedown && isHTMLSelectElement(*m_node)) {
         UseCounter::count(m_node->document(), UseCounter::UntrustedMouseDownEventDispatchedToSelect);
     }
 }

 } // namespace blink
	/*
	* 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, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
	* Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
	* Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
	* Copyright (C) 2011 Google 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/EventDispatcher.h"

	#include "core/dom/ContainerNode.h"
	#include "core/dom/Document.h"
	#include "core/dom/Element.h"
	#include "core/events/EventDispatchMediator.h"
	#include "core/events/MouseEvent.h"
	#include "core/events/ScopedEventQueue.h"
	#include "core/events/WindowEventContext.h"
	#include "core/frame/Deprecation.h"
	#include "core/frame/FrameView.h"
	#include "core/frame/LocalDOMWindow.h"
	#include "core/frame/Settings.h"
	#include "core/frame/UseCounter.h"
	#include "core/html/HTMLElement.h"
	#include "core/inspector/InspectorTraceEvents.h"
	#include "platform/EventDispatchForbiddenScope.h"
	#include "platform/TraceEvent.h"
	#include "wtf/RefPtr.h"

	namespace blink {

	DispatchEventResult EventDispatcher::dispatchEvent(Node& node, EventDispatchMediator* mediator)
	{
	TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("blink.debug"), "EventDispatcher::dispatchEvent");
	#if DCHECK_IS_ON()
	DCHECK(!EventDispatchForbiddenScope::isEventDispatchForbidden());
	#endif
	EventDispatcher dispatcher(node, &mediator->event());
	return mediator->dispatchEvent(dispatcher);
	}

	EventDispatcher::EventDispatcher(Node& node, Event* event)
	: m_node(node)
	, m_event(event)
	{
	DCHECK(m_event.get());
	m_view = node.document().view();
	m_event->initEventPath(*m_node);
	}

	void EventDispatcher::dispatchScopedEvent(Node& node, EventDispatchMediator* mediator)
	{
	// We need to set the target here because it can go away by the time we actually fire the event.
	mediator->event().setTarget(EventPath::eventTargetRespectingTargetRules(node));
	ScopedEventQueue::instance()->enqueueEventDispatchMediator(mediator);
	}

	void EventDispatcher::dispatchSimulatedClick(Node& node, Event* underlyingEvent, SimulatedClickMouseEventOptions mouseEventOptions, SimulatedClickCreationScope creationScope)
	{
	// This persistent vector doesn't cause leaks, because added Nodes are removed
	// before dispatchSimulatedClick() returns. This vector is here just to prevent
	// the code from running into an infinite recursion of dispatchSimulatedClick().
	DEFINE_STATIC_LOCAL(HeapHashSet<Member<Node>>, nodesDispatchingSimulatedClicks, (new HeapHashSet<Member<Node>>));

	if (isDisabledFormControl(&node))
	return;

	if (nodesDispatchingSimulatedClicks.contains(&node))
	return;

	nodesDispatchingSimulatedClicks.add(&node);

	if (mouseEventOptions == SendMouseOverUpDownEvents)
	EventDispatcher(node, MouseEvent::create(EventTypeNames::mouseover, node.document().domWindow(), underlyingEvent, creationScope)).dispatch();

	if (mouseEventOptions != SendNoEvents) {
	EventDispatcher(node, MouseEvent::create(EventTypeNames::mousedown, node.document().domWindow(), underlyingEvent, creationScope)).dispatch();
	node.setActive(true);
	EventDispatcher(node, MouseEvent::create(EventTypeNames::mouseup, node.document().domWindow(), underlyingEvent, creationScope)).dispatch();
	}
	// Some elements (e.g. the color picker) may set active state to true before
	// calling this method and expect the state to be reset during the call.
	node.setActive(false);

	// always send click
	EventDispatcher(node, MouseEvent::create(EventTypeNames::click, node.document().domWindow(), underlyingEvent, creationScope)).dispatch();

	nodesDispatchingSimulatedClicks.remove(&node);
	}

	DispatchEventResult EventDispatcher::dispatch()
	{
	TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("blink.debug"), "EventDispatcher::dispatch");

	#if DCHECK_IS_ON()
	DCHECK(!m_eventDispatched);
	m_eventDispatched = true;
	#endif
	if (event().eventPath().isEmpty()) {
	// eventPath() can be empty if event path is shrinked by relataedTarget retargeting.
	return DispatchEventResult::NotCanceled;
	}
	m_event->eventPath().ensureWindowEventContext();

	m_event->setTarget(EventPath::eventTargetRespectingTargetRules(*m_node));
	#if DCHECK_IS_ON()
	DCHECK(!EventDispatchForbiddenScope::isEventDispatchForbidden());
	#endif
	DCHECK(m_event->target());
	TRACE_EVENT1("devtools.timeline", "EventDispatch", "data", InspectorEventDispatchEvent::data(*m_event));
	EventDispatchHandlingState* preDispatchEventHandlerResult = nullptr;
	if (dispatchEventPreProcess(preDispatchEventHandlerResult) == ContinueDispatching) {
	if (dispatchEventAtCapturing() == ContinueDispatching) {
	if (dispatchEventAtTarget() == ContinueDispatching)
	dispatchEventAtBubbling();
	}
	}
	dispatchEventPostProcess(preDispatchEventHandlerResult);

	// Ensure that after event dispatch, the event's target object is the
	// outermost shadow DOM boundary.
	m_event->setTarget(m_event->eventPath().windowEventContext().target());
	m_event->setCurrentTarget(nullptr);
	TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "UpdateCounters", TRACE_EVENT_SCOPE_THREAD, "data", InspectorUpdateCountersEvent::data());

	return EventTarget::dispatchEventResult(*m_event);
	}

	inline EventDispatchContinuation EventDispatcher::dispatchEventPreProcess(EventDispatchHandlingState*& preDispatchEventHandlerResult)
	{
	// Give the target node a chance to do some work before DOM event handlers get a crack.
	preDispatchEventHandlerResult = m_node->preDispatchEventHandler(m_event.get());
	return (m_event->eventPath().isEmpty() \|\| m_event->propagationStopped()) ? DoneDispatching : ContinueDispatching;
	}

	inline EventDispatchContinuation EventDispatcher::dispatchEventAtCapturing()
	{
	// Trigger capturing event handlers, starting at the top and working our way down.
	m_event->setEventPhase(Event::kCapturingPhase);

	if (m_event->eventPath().windowEventContext().handleLocalEvents(*m_event) && m_event->propagationStopped())
	return DoneDispatching;

	for (size_t i = m_event->eventPath().size() - 1; i > 0; --i) {
	const NodeEventContext& eventContext = m_event->eventPath()[i];
	if (eventContext.currentTargetSameAsTarget())
	continue;
	eventContext.handleLocalEvents(*m_event);
	if (m_event->propagationStopped())
	return DoneDispatching;
	}

	return ContinueDispatching;
	}

	inline EventDispatchContinuation EventDispatcher::dispatchEventAtTarget()
	{
	m_event->setEventPhase(Event::kAtTarget);
	m_event->eventPath()[0].handleLocalEvents(*m_event);
	return m_event->propagationStopped() ? DoneDispatching : ContinueDispatching;
	}

	inline void EventDispatcher::dispatchEventAtBubbling()
	{
	// Trigger bubbling event handlers, starting at the bottom and working our way up.
	size_t size = m_event->eventPath().size();
	for (size_t i = 1; i < size; ++i) {
	const NodeEventContext& eventContext = m_event->eventPath()[i];
	if (eventContext.currentTargetSameAsTarget()) {
	m_event->setEventPhase(Event::kAtTarget);
	} else if (m_event->bubbles() && !m_event->cancelBubble()) {
	m_event->setEventPhase(Event::kBubblingPhase);
	} else {
	if (m_event->bubbles() && m_event->cancelBubble() && eventContext.node() && eventContext.node()->hasEventListeners(m_event->type()))
	UseCounter::count(eventContext.node()->document(), UseCounter::EventCancelBubbleAffected);
	continue;
	}
	eventContext.handleLocalEvents(*m_event);
	if (m_event->propagationStopped())
	return;
	}
	if (m_event->bubbles() && !m_event->cancelBubble()) {
	m_event->setEventPhase(Event::kBubblingPhase);
	m_event->eventPath().windowEventContext().handleLocalEvents(*m_event);
	} else if (m_event->bubbles() && m_event->eventPath().windowEventContext().window() && m_event->eventPath().windowEventContext().window()->hasEventListeners(m_event->type())) {
	UseCounter::count(m_event->eventPath().windowEventContext().window()->getExecutionContext(), UseCounter::EventCancelBubbleAffected);
	}
	}

	inline void EventDispatcher::dispatchEventPostProcess(EventDispatchHandlingState* preDispatchEventHandlerResult)
	{
	m_event->setTarget(EventPath::eventTargetRespectingTargetRules(*m_node));
	m_event->setCurrentTarget(nullptr);
	m_event->setEventPhase(0);

	// Pass the data from the preDispatchEventHandler to the postDispatchEventHandler.
	m_node->postDispatchEventHandler(m_event.get(), preDispatchEventHandlerResult);

	bool isClick = m_event->isMouseEvent() && toMouseEvent(*m_event).type() == EventTypeNames::click;
	if (isClick) {
	// Fire an accessibility event indicating a node was clicked on. This is safe if m_event->target()->toNode() returns null.
	if (AXObjectCache* cache = m_node->document().existingAXObjectCache())
	cache->handleClicked(m_event->target()->toNode());
	}

	// The DOM Events spec says that events dispatched by JS (other than "click")
	// should not have their default handlers invoked.
	bool isTrustedOrClick = !RuntimeEnabledFeatures::trustedEventsDefaultActionEnabled() \|\| m_event->isTrusted() \|\| isClick;

	// For Android WebView (distinguished by wideViewportQuirkEnabled)
	// enable untrusted events for mouse down on select elements because
	// fastclick.js seems to generate these. crbug.com/642698
	// TODO(dtapuska): Change this to a target SDK quirk crbug.com/643705
	if (!isTrustedOrClick && m_event->isMouseEvent() && m_event->type() == EventTypeNames::mousedown && isHTMLSelectElement(*m_node)) {
	if (Settings* settings = m_node->document().settings()) {
	isTrustedOrClick = settings->wideViewportQuirkEnabled();
	}
	}

	// Call default event handlers. While the DOM does have a concept of preventing
	// default handling, the detail of which handlers are called is an internal
	// implementation detail and not part of the DOM.
	if (!m_event->defaultPrevented() && !m_event->defaultHandled() && isTrustedOrClick) {
	// Non-bubbling events call only one default event handler, the one for the target.
	m_node->willCallDefaultEventHandler(*m_event);
	m_node->defaultEventHandler(m_event.get());
	DCHECK(!m_event->defaultPrevented());
	// For bubbling events, call default event handlers on the same targets in the
	// same order as the bubbling phase.
	if (!m_event->defaultHandled() && m_event->bubbles()) {
	size_t size = m_event->eventPath().size();
	for (size_t i = 1; i < size; ++i) {
	m_event->eventPath()[i].node()->willCallDefaultEventHandler(*m_event);
	m_event->eventPath()[i].node()->defaultEventHandler(m_event.get());
	DCHECK(!m_event->defaultPrevented());
	if (m_event->defaultHandled())
	break;
	}
	}
	}

	// Track the usage of sending a mousedown event to a select element to force
	// it to open. This measures a possible breakage of not allowing untrusted
	// events to open select boxes.
	if (!m_event->isTrusted() && m_event->isMouseEvent() && m_event->type() == EventTypeNames::mousedown && isHTMLSelectElement(*m_node)) {
	UseCounter::count(m_node->document(), UseCounter::UntrustedMouseDownEventDispatchedToSelect);
	}
	}

	} // namespace blink