import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

widget/windows/nsDragService.h

@@ -0,0 +1,61 @@
+/* -*- 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 nsDragService_h__
+#define nsDragService_h__
+
+#include "nsBaseDragService.h"
+#include <windows.h>
+#include <shlobj.h>
+
+struct IDataObject;
+class  nsDataObjCollection;
+
+/**
+ * Native Win32 DragService wrapper
+ */
+
+class nsDragService : public nsBaseDragService
+{
+public:
+  nsDragService();
+  virtual ~nsDragService();
+  
+  // nsBaseDragService
+  virtual nsresult InvokeDragSessionImpl(nsIArray* anArrayTransferables,
+                                         nsIScriptableRegion* aRegion,
+                                         uint32_t aActionType);
+
+  // nsIDragSession
+  NS_IMETHOD GetData(nsITransferable * aTransferable, uint32_t anItem);
+  NS_IMETHOD GetNumDropItems(uint32_t * aNumItems);
+  NS_IMETHOD IsDataFlavorSupported(const char *aDataFlavor, bool *_retval);
+  NS_IMETHOD EndDragSession(bool aDoneDrag);
+
+  // native impl.
+  NS_IMETHOD SetIDataObject(IDataObject * aDataObj);
+  NS_IMETHOD StartInvokingDragSession(IDataObject * aDataObj,
+                                      uint32_t aActionType);
+
+  // A drop occurred within the application vs. outside of it.
+  void SetDroppedLocal();
+
+protected:
+  nsDataObjCollection* GetDataObjCollection(IDataObject * aDataObj);
+
+  // determine if we have a single data object or one of our private
+  // collections
+  bool IsCollectionObject(IDataObject* inDataObj);
+
+  // Create a bitmap for drag operations
+  bool CreateDragImage(nsIDOMNode *aDOMNode,
+                         nsIScriptableRegion *aRegion,
+                         SHDRAGIMAGE *psdi);
+
+  IDataObject * mDataObject;
+  bool mSentLocalDropEvent;
+};
+
+#endif // nsDragService_h__