Implement DragEvent and move MouseEvent.dataTransfer

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.
  *
  * 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 "config.h"
 #include "core/events/MouseEvent.h"
 
 #include "bindings/core/v8/DOMWrapperWorld.h"
 #include "bindings/core/v8/ScriptState.h"
-#include "core/clipboard/DataTransfer.h"
 #include "core/dom/Element.h"
 #include "core/events/EventDispatcher.h"
 #include "platform/PlatformMouseEvent.h"
 
 namespace blink {
 
 PassRefPtrWillBeRawPtr<MouseEvent> MouseEvent::create(ScriptState* scriptState, const AtomicString& type, const MouseEventInit& initializer)
 {
     if (scriptState && scriptState->world().isIsolatedWorld())
         UIEventWithKeyState::didCreateEventInIsolatedWorld(initializer.ctrlKey(), initializer.altKey(), initializer.shiftKey(), initializer.metaKey());
     return adoptRefWillBeNoop(new MouseEvent(type, initializer));
 }
 
 PassRefPtrWillBeRawPtr<MouseEvent> MouseEvent::create(const AtomicString& eventType, PassRefPtrWillBeRawPtr<AbstractView> view, const PlatformMouseEvent& event, int detail, PassRefPtrWillBeRawPtr<Node> relatedTarget)
 {
     ASSERT(event.type() == PlatformEvent::MouseMoved || event.button() != NoButton);
 
     bool isMouseEnterOrLeave = eventType == EventTypeNames::mouseenter || eventType == EventTypeNames::mouseleave;
     bool isCancelable = !isMouseEnterOrLeave;
     bool isBubbling = !isMouseEnterOrLeave;
 
     return MouseEvent::create(
         eventType, isBubbling, isCancelable, view,
         detail, event.globalPosition().x(), event.globalPosition().y(), event.position().x(), event.position().y(),
         event.movementDelta().x(), event.movementDelta().y(),
         event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(), event.button(),
         platformModifiersToButtons(event.modifiers()),
-        relatedTarget, nullptr, false, event.syntheticEventType(), event.timestamp());
+        relatedTarget, false, event.syntheticEventType(), event.timestamp());
 }
 
 PassRefPtrWillBeRawPtr<MouseEvent> MouseEvent::create(const AtomicString& type, 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,
+    PassRefPtrWillBeRawPtr<EventTarget> relatedTarget, bool isSimulated, PlatformMouseEvent::SyntheticEventType syntheticEventType,
     double uiCreateTime)
 {
     return adoptRefWillBeNoop(new MouseEvent(type, canBubble, cancelable, view,
         detail, screenX, screenY, windowX, windowY,
         movementX, movementY,
-        ctrlKey, altKey, shiftKey, metaKey, button, buttons, relatedTarget, dataTransfer, isSimulated, syntheticEventType, uiCreateTime));
+        ctrlKey, altKey, shiftKey, metaKey, button, buttons, relatedTarget, isSimulated, syntheticEventType, uiCreateTime));
 }
 
 MouseEvent::MouseEvent()
     : m_button(0)
     , m_buttons(0)
     , m_relatedTarget(nullptr)
-    , m_dataTransfer(nullptr)
     , m_syntheticEventType(PlatformMouseEvent::RealOrIndistinguishable)
 {
 }
 
 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,
+    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)
 {
     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)
 {
     initCoordinates(IntPoint(initializer.clientX(), initializer.clientY()));
 }
 
 MouseEvent::~MouseEvent()
 {
 }
 
 unsigned short MouseEvent::platformModifiersToButtons(unsigned modifiers)
@@ skipping 35 matching lines @@
     m_altKey = altKey;
     m_shiftKey = shiftKey;
     m_metaKey = metaKey;
     m_button = button;
     m_buttons = buttons;
     m_relatedTarget = relatedTarget;
 
     initCoordinates(IntPoint(clientX, clientY));
 
     // FIXME: m_isSimulated is not set to false here.
-    // FIXME: m_dataTransfer is not set to nullptr here.
 }
 
 const AtomicString& MouseEvent::interfaceName() const
 {
     return EventNames::MouseEvent;
 }
 
 bool MouseEvent::isMouseEvent() const
 {
     return true;
 }
 
-bool MouseEvent::isDragEvent() const
-{
-    const AtomicString& t = type();
-    return t == EventTypeNames::dragenter || t == EventTypeNames::dragover || t == EventTypeNames::dragleave || t == EventTypeNames::drop
-               || t == EventTypeNames::dragstart|| t == EventTypeNames::drag || t == EventTypeNames::dragend;
-}
-
 int MouseEvent::which() const
 {
     // For the DOM, the return values for left, middle and right mouse buttons are 0, 1, 2, respectively.
     // For the Netscape "which" property, the return values for left, middle and right mouse buttons are 1, 2, 3, respectively.
     // So we must add 1.
     return m_button + 1;
 }
 
 Node* MouseEvent::toElement() const
 {
     // MSIE extension - "the object toward which the user is moving the mouse pointer"
     if (type() == EventTypeNames::mouseout || type() == EventTypeNames::mouseleave)
         return relatedTarget() ? relatedTarget()->toNode() : 0;
 
     return target() ? target()->toNode() : 0;
 }
 
 Node* MouseEvent::fromElement() const
 {
     // MSIE extension - "object from which activation or the mouse pointer is exiting during the event" (huh?)
     if (type() != EventTypeNames::mouseout && type() != EventTypeNames::mouseleave)
         return relatedTarget() ? relatedTarget()->toNode() : 0;
 
     return target() ? target()->toNode() : 0;
 }
 
 DEFINE_TRACE(MouseEvent)
 {
     visitor->trace(m_relatedTarget);
-    visitor->trace(m_dataTransfer);
     MouseRelatedEvent::trace(visitor);
 }
 
 PassRefPtrWillBeRawPtr<SimulatedMouseEvent> SimulatedMouseEvent::create(const AtomicString& eventType, PassRefPtrWillBeRawPtr<AbstractView> view, PassRefPtrWillBeRawPtr<Event> underlyingEvent)
 {
     return adoptRefWillBeNoop(new SimulatedMouseEvent(eventType, view, underlyingEvent));
 }
 
 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)
+        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);
 
@@ skipping 66 matching lines @@
     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