gecko/content/events/src/nsDOMMouseScrollEvent.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsDOMMouseScrollEvent.h"
#include "prtime.h"

nsDOMMouseScrollEvent::nsDOMMouseScrollEvent(mozilla::dom::EventTarget* aOwner,
                                             nsPresContext* aPresContext,
                                             nsInputEvent* aEvent)
  : nsDOMMouseEvent(aOwner, aPresContext,
                    aEvent ? aEvent : new nsMouseScrollEvent(false, 0, nullptr))
{
  if (aEvent) {
    mEventIsInternal = false;
  } else {
    mEventIsInternal = true;
    mEvent->time = PR_Now();
    mEvent->refPoint.x = mEvent->refPoint.y = 0;
    static_cast<nsMouseEvent*>(mEvent)->inputSource = nsIDOMMouseEvent::MOZ_SOURCE_UNKNOWN;
  }

  if(mEvent->eventStructType == NS_MOUSE_SCROLL_EVENT) {
    mDetail = static_cast<nsMouseScrollEvent*>(mEvent)->delta;
  }
}

nsDOMMouseScrollEvent::~nsDOMMouseScrollEvent()
{
  if (mEventIsInternal && mEvent) {
    switch (mEvent->eventStructType)
    {
      case NS_MOUSE_SCROLL_EVENT:
        delete static_cast<nsMouseScrollEvent*>(mEvent);
        break;
      default:
        delete mEvent;
        break;
    }
    mEvent = nullptr;
  }
}

NS_IMPL_ADDREF_INHERITED(nsDOMMouseScrollEvent, nsDOMMouseEvent)
NS_IMPL_RELEASE_INHERITED(nsDOMMouseScrollEvent, nsDOMMouseEvent)

NS_INTERFACE_MAP_BEGIN(nsDOMMouseScrollEvent)
  NS_INTERFACE_MAP_ENTRY(nsIDOMMouseScrollEvent)
NS_INTERFACE_MAP_END_INHERITING(nsDOMMouseEvent)

NS_IMETHODIMP
nsDOMMouseScrollEvent::InitMouseScrollEvent(const nsAString & aType, bool aCanBubble, bool aCancelable,
                                nsIDOMWindow *aView, int32_t aDetail, int32_t aScreenX, 
                                int32_t aScreenY, int32_t aClientX, int32_t aClientY, 
                                bool aCtrlKey, bool aAltKey, bool aShiftKey, 
                                bool aMetaKey, uint16_t aButton, nsIDOMEventTarget *aRelatedTarget,
                                int32_t aAxis)
{
  nsresult rv = nsDOMMouseEvent::InitMouseEvent(aType, aCanBubble, aCancelable, aView, aDetail,
                                                aScreenX, aScreenY, aClientX, aClientY, aCtrlKey,
                                                aAltKey, aShiftKey, aMetaKey, aButton, aRelatedTarget);
  NS_ENSURE_SUCCESS(rv, rv);
  
  if (mEvent->eventStructType == NS_MOUSE_SCROLL_EVENT) {
    static_cast<nsMouseScrollEvent*>(mEvent)->isHorizontal =
                                                (aAxis == HORIZONTAL_AXIS);
  }

  return NS_OK;
}


NS_IMETHODIMP
nsDOMMouseScrollEvent::GetAxis(int32_t* aResult)
{
  NS_ENSURE_ARG_POINTER(aResult);
  *aResult = Axis();
  return NS_OK;
}

int32_t
nsDOMMouseScrollEvent::Axis()
{
  if (mEvent->eventStructType == NS_MOUSE_SCROLL_EVENT) {
    return static_cast<nsMouseScrollEvent*>(mEvent)->isHorizontal ?
             static_cast<int32_t>(HORIZONTAL_AXIS) :
             static_cast<int32_t>(VERTICAL_AXIS);
  }
  return 0;
}

nsresult NS_NewDOMMouseScrollEvent(nsIDOMEvent** aInstancePtrResult,
                                   mozilla::dom::EventTarget* aOwner,
                                   nsPresContext* aPresContext,
                                   nsInputEvent *aEvent) 
{
  nsDOMMouseScrollEvent* it =
    new nsDOMMouseScrollEvent(aOwner, aPresContext, aEvent);
  return CallQueryInterface(it, aInstancePtrResult);
}