1 files changed, 68 insertions, 0 deletions
diff --git a/widget/windows/nsNativeDragSource.h b/widget/windows/nsNativeDragSource.h
new file mode 100644
index 0000000000..a8e37b90a8
--- /dev/null
+++ b/widget/windows/nsNativeDragSource.h
@@ -0,0 +1,68 @@
+/* -*- 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/. */
+#ifndef _nsNativeDragSource_h_
+#define _nsNativeDragSource_h_
+
+#include "nscore.h"
+#include <ole2.h>
+#include <oleidl.h>
+#include "mozilla/Attributes.h"
+#include "mozilla/RefPtr.h"
+
+namespace mozilla {
+namespace dom {
+class DataTransfer;
+}  // namespace dom
+}  // namespace mozilla
+
+// class nsIDragSource;
+
+/*
+ * nsNativeDragSource implements the IDropSource interface and gets
+ * most of its behavior from the associated adapter (m_dragDrop).
+ */
+class nsNativeDragSource final : public IDropSource {
+ public:
+  // construct an nsNativeDragSource referencing adapter
+  // nsNativeDragSource(nsIDragSource * adapter);
+  explicit nsNativeDragSource(mozilla::dom::DataTransfer* aDataTransfer);
+  ~nsNativeDragSource();
+
+  // IUnknown methods - see iunknown.h for documentation
+
+  STDMETHODIMP QueryInterface(REFIID, void**);
+  STDMETHODIMP_(ULONG) AddRef();
+  STDMETHODIMP_(ULONG) Release();
+
+  // IDropSource methods - see idropsrc.h for documentation
+
+  // Return DRAGDROP_S_USEDEFAULTCURSORS if this object lets OLE provide
+  // default cursors, otherwise return NOERROR. This method gets called in
+  // response to changes that the target makes to dEffect (DragEnter,
+  // DragOver).
+  STDMETHODIMP GiveFeedback(DWORD dEffect);
+
+  // This method gets called if there is any change in the mouse or key
+  // state.  Return DRAGDROP_S_CANCEL to stop the drag, DRAGDROP_S_DROP
+  // to execute the drop, otherwise NOERROR.
+  STDMETHODIMP QueryContinueDrag(BOOL fESC, DWORD grfKeyState);
+
+  bool UserCancelled() { return mUserCancelled; }
+
+ protected:
+  // Reference count
+  ULONG m_cRef;
+
+  // Data object, hold information about cursor state
+  RefPtr<mozilla::dom::DataTransfer> mDataTransfer;
+
+  // Custom drag cursor
+  HCURSOR m_hCursor;
+
+  // true if the user cancelled the drag by pressing escape
+  bool mUserCancelled;
+};
+
+#endif  // _nsNativeDragSource_h_