gecko-dev/dom/events/MouseScrollEvent.cpp

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "mozilla/dom/MouseScrollEvent.h"
#include "mozilla/dom/MouseEventBinding.h"
#include "mozilla/MouseEvents.h"
#include "prtime.h"

namespace mozilla {
namespace dom {

MouseScrollEvent::MouseScrollEvent(EventTarget* aOwner,
                                   nsPresContext* aPresContext,
                                   WidgetMouseScrollEvent* aEvent)
    : MouseEvent(aOwner, aPresContext,
                 aEvent
                     ? aEvent
                     : new WidgetMouseScrollEvent(false, eVoidEvent, nullptr)) {
  if (aEvent) {
    mEventIsInternal = false;
  } else {
    mEventIsInternal = true;
    mEvent->mTime = PR_Now();
    mEvent->mRefPoint = LayoutDeviceIntPoint(0, 0);
    static_cast<WidgetMouseEventBase*>(mEvent)->inputSource =
        MouseEvent_Binding::MOZ_SOURCE_UNKNOWN;
  }

  mDetail = mEvent->AsMouseScrollEvent()->mDelta;
}

void MouseScrollEvent::InitMouseScrollEvent(
    const nsAString& aType, bool aCanBubble, bool aCancelable,
    nsGlobalWindowInner* 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,
    EventTarget* aRelatedTarget, int32_t aAxis) {
  NS_ENSURE_TRUE_VOID(!mEvent->mFlags.mIsBeingDispatched);

  MouseEvent::InitMouseEvent(aType, aCanBubble, aCancelable, aView, aDetail,
                             aScreenX, aScreenY, aClientX, aClientY, aCtrlKey,
                             aAltKey, aShiftKey, aMetaKey, aButton,
                             aRelatedTarget);
  mEvent->AsMouseScrollEvent()->mIsHorizontal =
      (aAxis == MouseScrollEvent_Binding::HORIZONTAL_AXIS);
}

int32_t MouseScrollEvent::Axis() {
  return mEvent->AsMouseScrollEvent()->mIsHorizontal
             ? MouseScrollEvent_Binding::HORIZONTAL_AXIS
             : MouseScrollEvent_Binding::VERTICAL_AXIS;
}

}  // namespace dom
}  // namespace mozilla

using namespace mozilla;
using namespace dom;

already_AddRefed<MouseScrollEvent> NS_NewDOMMouseScrollEvent(
    EventTarget* aOwner, nsPresContext* aPresContext,
    WidgetMouseScrollEvent* aEvent) {
  RefPtr<MouseScrollEvent> it =
      new MouseScrollEvent(aOwner, aPresContext, aEvent);
  return it.forget();
}