Virtualize EventDispatchMediator creation and cleanup calling.

Source/core/events/MouseEvent.cpp

 /*
  * 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.
@@ skipping 58 matching lines @@
         movementX, movementY,
         ctrlKey, altKey, shiftKey, metaKey, button, buttons, relatedTarget, dataTransfer, isSimulated, syntheticEventType, uiCreateTime));
 }
 
 MouseEvent::MouseEvent()
     : m_button(0)
     , m_buttons(0)
     , m_relatedTarget(nullptr)
     , m_dataTransfer(nullptr)
     , m_syntheticEventType(PlatformMouseEvent::RealOrIndistinguishable)
+    , m_isTrusted(false)
 {
 }
 
 MouseEvent::MouseEvent(const AtomicString& eventType, bool canBubble, bool cancelable, PassRefPtrWillBeRawPtr<AbstractView> view,
     int detail, int screenX, int screenY, int windowX, int windowY,
     int movementX, int movementY,
     bool ctrlKey, bool altKey, bool shiftKey, bool metaKey,
     short button, unsigned short buttons, PassRefPtrWillBeRawPtr<EventTarget> relatedTarget,
     DataTransfer* dataTransfer, bool isSimulated, PlatformMouseEvent::SyntheticEventType syntheticEventType,
     double uiCreateTime)
     : MouseRelatedEvent(eventType, canBubble, cancelable, view, detail, IntPoint(screenX, screenY),
         IntPoint(windowX, windowY),
         IntPoint(movementX, movementY),
         ctrlKey, altKey, shiftKey, metaKey, isSimulated,
         syntheticEventType == PlatformMouseEvent::FromTouch ? InputDevice::firesTouchEventsInputDevice() : InputDevice::doesntFireTouchEventsInputDevice())
     , m_button(button)
     , m_buttons(buttons)
     , m_relatedTarget(relatedTarget)
     , m_dataTransfer(dataTransfer)
     , m_syntheticEventType(syntheticEventType)
+    , m_isTrusted(false)
 {
     setUICreateTime(uiCreateTime);
 }
 
 MouseEvent::MouseEvent(const AtomicString& eventType, const MouseEventInit& initializer)
     : MouseRelatedEvent(eventType, initializer.bubbles(), initializer.cancelable(), initializer.view(), initializer.detail(), IntPoint(initializer.screenX(), initializer.screenY()),
         IntPoint(0 /* pageX */, 0 /* pageY */),
         IntPoint(initializer.movementX(), initializer.movementY()),
         initializer.ctrlKey(), initializer.altKey(), initializer.shiftKey(), initializer.metaKey(), false /* isSimulated */, initializer.sourceDevice())
     , m_button(initializer.button())
     , m_buttons(initializer.buttons())
     , m_relatedTarget(initializer.relatedTarget())
     , m_dataTransfer(nullptr)
     , m_syntheticEventType(PlatformMouseEvent::RealOrIndistinguishable)
+    , m_isTrusted(false)
 {
     initCoordinates(IntPoint(initializer.clientX(), initializer.clientY()));
 }
 
 MouseEvent::~MouseEvent()
 {
 }
 
 unsigned short MouseEvent::platformModifiersToButtons(unsigned modifiers)
 {
@@ skipping 100 matching lines @@
 }
 
 SimulatedMouseEvent::~SimulatedMouseEvent()
 {
 }
 
 SimulatedMouseEvent::SimulatedMouseEvent(const AtomicString& eventType, PassRefPtrWillBeRawPtr<AbstractView> view, PassRefPtrWillBeRawPtr<Event> underlyingEvent)
     : MouseEvent(eventType, true, true, view, 0, 0, 0, 0, 0, 0, 0, false, false, false, false, 0, 0,
         nullptr, nullptr, true, PlatformMouseEvent::RealOrIndistinguishable)
 {
+    setTrusted(true);
     if (UIEventWithKeyState* keyStateEvent = findEventWithKeyState(underlyingEvent.get())) {
         m_ctrlKey = keyStateEvent->ctrlKey();
         m_altKey = keyStateEvent->altKey();
         m_shiftKey = keyStateEvent->shiftKey();
         m_metaKey = keyStateEvent->metaKey();
     }
     setUnderlyingEvent(underlyingEvent);
 
     if (this->underlyingEvent() && this->underlyingEvent()->isMouseEvent()) {
         MouseEvent* mouseEvent = toMouseEvent(this->underlyingEvent());
         m_screenLocation = mouseEvent->screenLocation();
         initCoordinates(mouseEvent->clientLocation());
     }
 }
 
+PassRefPtrWillBeRawPtr<EventDispatchMediator> MouseEvent::createMediator()
+{
+    return MouseEventDispatchMediator::create(this);
+}
+
 DEFINE_TRACE(SimulatedMouseEvent)
 {
     MouseEvent::trace(visitor);
 }
 
-PassRefPtrWillBeRawPtr<MouseEventDispatchMediator> MouseEventDispatchMediator::create(PassRefPtrWillBeRawPtr<MouseEvent> mouseEvent, MouseEventType mouseEventType)
+PassRefPtrWillBeRawPtr<MouseEventDispatchMediator> MouseEventDispatchMediator::create(PassRefPtrWillBeRawPtr<MouseEvent> mouseEvent)
 {
-    return adoptRefWillBeNoop(new MouseEventDispatchMediator(mouseEvent, mouseEventType));
+    return adoptRefWillBeNoop(new MouseEventDispatchMediator(mouseEvent));
 }
 
-MouseEventDispatchMediator::MouseEventDispatchMediator(PassRefPtrWillBeRawPtr<MouseEvent> mouseEvent, MouseEventType mouseEventType)
-    : EventDispatchMediator(mouseEvent), m_mouseEventType(mouseEventType)
+MouseEventDispatchMediator::MouseEventDispatchMediator(PassRefPtrWillBeRawPtr<MouseEvent> mouseEvent)
+    : EventDispatchMediator(mouseEvent)
 {
 }
 
 MouseEvent& MouseEventDispatchMediator::event() const
 {
     return toMouseEvent(EventDispatchMediator::event());
 }
 
 bool MouseEventDispatchMediator::dispatchEvent(EventDispatcher& dispatcher) const
 {
-    if (isSyntheticMouseEvent()) {
+    if (!event().isTrusted()) {
         event().eventPath().adjustForRelatedTarget(dispatcher.node(), event().relatedTarget());
         return dispatcher.dispatch();
     }
 
     if (isDisabledFormControl(&dispatcher.node()))
         return false;
 
     if (event().type().isEmpty())
         return true; // Shouldn't happen.
 
     ASSERT(!event().target() || event().target() != event().relatedTarget());
 
     EventTarget* relatedTarget = event().relatedTarget();
     event().eventPath().adjustForRelatedTarget(dispatcher.node(), relatedTarget);
 
     dispatcher.dispatch();
     bool swallowEvent = event().defaultHandled() || event().defaultPrevented();
 
     if (event().type() != EventTypeNames::click || event().detail() != 2)
         return !swallowEvent;
 
     // Special case: If it's a double click event, we also send the dblclick event. This is not part
     // of the DOM specs, but is used for compatibility with the ondblclick="" attribute. This is treated
     // as a separate event in other DOM-compliant browsers like Firefox, and so we do the same.
     RefPtrWillBeRawPtr<MouseEvent> doubleClickEvent = MouseEvent::create();
     doubleClickEvent->initMouseEventInternal(nullptr, EventTypeNames::dblclick, event().bubbles(), event().cancelable(), event().view(),
         event().detail(), event().screenX(), event().screenY(), event().clientX(), event().clientY(),
         event().ctrlKey(), event().altKey(), event().shiftKey(), event().metaKey(),
         event().button(), relatedTarget, event().sourceDevice(), event().buttons());
+
+    // Inherit the trusted status from the original event.
+    doubleClickEvent->setTrusted(event().isTrusted());
     if (event().defaultHandled())
         doubleClickEvent->setDefaultHandled();
     EventDispatcher::dispatchEvent(dispatcher.node(), MouseEventDispatchMediator::create(doubleClickEvent));
     if (doubleClickEvent->defaultHandled() || doubleClickEvent->defaultPrevented())
         return false;
     return !swallowEvent;
 }
 
 } // namespace blink