1 files changed, 134 insertions, 0 deletions
diff --git a/dom/events/DragEvent.cpp b/dom/events/DragEvent.cpp
new file mode 100644
index 000000000..9419ad9e9
--- /dev/null
+++ b/dom/events/DragEvent.cpp
@@ -0,0 +1,134 @@
+/* -*- 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/DragEvent.h"
+#include "mozilla/MouseEvents.h"
+#include "nsContentUtils.h"
+#include "prtime.h"
+
+namespace mozilla {
+namespace dom {
+
+DragEvent::DragEvent(EventTarget* aOwner,
+                     nsPresContext* aPresContext,
+                     WidgetDragEvent* aEvent)
+  : MouseEvent(aOwner, aPresContext,
+               aEvent ? aEvent :
+                        new WidgetDragEvent(false, eVoidEvent, nullptr))
+{
+  if (aEvent) {
+    mEventIsInternal = false;
+  }
+  else {
+    mEventIsInternal = true;
+    mEvent->mTime = PR_Now();
+    mEvent->mRefPoint = LayoutDeviceIntPoint(0, 0);
+    mEvent->AsMouseEvent()->inputSource = nsIDOMMouseEvent::MOZ_SOURCE_UNKNOWN;
+  }
+}
+
+NS_IMPL_ADDREF_INHERITED(DragEvent, MouseEvent)
+NS_IMPL_RELEASE_INHERITED(DragEvent, MouseEvent)
+
+NS_INTERFACE_MAP_BEGIN(DragEvent)
+  NS_INTERFACE_MAP_ENTRY(nsIDOMDragEvent)
+NS_INTERFACE_MAP_END_INHERITING(MouseEvent)
+
+void
+DragEvent::InitDragEvent(const nsAString& aType,
+                         bool aCanBubble,
+                         bool aCancelable,
+                         nsGlobalWindow* 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,
+                         DataTransfer* aDataTransfer)
+{
+  NS_ENSURE_TRUE_VOID(!mEvent->mFlags.mIsBeingDispatched);
+
+  MouseEvent::InitMouseEvent(aType, aCanBubble, aCancelable,
+                             aView, aDetail, aScreenX, aScreenY,
+                             aClientX, aClientY, aCtrlKey, aAltKey,
+                             aShiftKey, aMetaKey, aButton, aRelatedTarget);
+  if (mEventIsInternal) {
+    mEvent->AsDragEvent()->mDataTransfer = aDataTransfer;
+  }
+}
+
+NS_IMETHODIMP
+DragEvent::GetDataTransfer(nsIDOMDataTransfer** aDataTransfer)
+{
+  NS_IF_ADDREF(*aDataTransfer = GetDataTransfer());
+  return NS_OK;
+}
+
+DataTransfer*
+DragEvent::GetDataTransfer()
+{
+  // the dataTransfer field of the event caches the DataTransfer associated
+  // with the drag. It is initialized when an attempt is made to retrieve it
+  // rather that when the event is created to avoid duplicating the data when
+  // no listener ever uses it.
+  if (!mEvent || mEvent->mClass != eDragEventClass) {
+    NS_WARNING("Tried to get dataTransfer from non-drag event!");
+    return nullptr;
+  }
+
+  WidgetDragEvent* dragEvent = mEvent->AsDragEvent();
+  // for synthetic events, just use the supplied data transfer object even if null
+  if (!mEventIsInternal) {
+    nsresult rv = nsContentUtils::SetDataTransferInEvent(dragEvent);
+    NS_ENSURE_SUCCESS(rv, nullptr);
+  }
+
+  return dragEvent->mDataTransfer;
+}
+
+// static
+already_AddRefed<DragEvent>
+DragEvent::Constructor(const GlobalObject& aGlobal,
+                       const nsAString& aType,
+                       const DragEventInit& aParam,
+                       ErrorResult& aRv)
+{
+  nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
+  RefPtr<DragEvent> e = new DragEvent(t, nullptr, nullptr);
+  bool trusted = e->Init(t);
+  e->InitDragEvent(aType, aParam.mBubbles, aParam.mCancelable,
+                   aParam.mView, aParam.mDetail, aParam.mScreenX,
+                   aParam.mScreenY, aParam.mClientX, aParam.mClientY,
+                   aParam.mCtrlKey, aParam.mAltKey, aParam.mShiftKey,
+                   aParam.mMetaKey, aParam.mButton, aParam.mRelatedTarget,
+                   aParam.mDataTransfer);
+  e->InitializeExtraMouseEventDictionaryMembers(aParam);
+  e->SetTrusted(trusted);
+  e->SetComposed(aParam.mComposed);
+  return e.forget();
+}
+
+} // namespace dom
+} // namespace mozilla
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+already_AddRefed<DragEvent>
+NS_NewDOMDragEvent(EventTarget* aOwner,
+                   nsPresContext* aPresContext,
+                   WidgetDragEvent* aEvent) 
+{
+  RefPtr<DragEvent> event =
+    new DragEvent(aOwner, aPresContext, aEvent);
+  return event.forget();
+}