1 files changed, 66 insertions, 0 deletions
diff --git a/dom/events/MouseScrollEvent.cpp b/dom/events/MouseScrollEvent.cpp
new file mode 100644
index 0000000000..58bc0b2dbb
--- /dev/null
+++ b/dom/events/MouseScrollEvent.cpp
@@ -0,0 +1,66 @@
+/* -*- 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::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->mRefPoint = LayoutDeviceIntPoint(0, 0);
+    static_cast<WidgetMouseEventBase*>(mEvent)->mInputSource =
+        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 mozilla::dom
+
+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();
+}