diff -r 000000000000 -r 6474c204b198 widget/windows/nsDataObjCollection.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widget/windows/nsDataObjCollection.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,135 @@
+/* -*- 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 _NSDATAOBJCOLLECTION_H_
+#define _NSDATAOBJCOLLECTION_H_
+
+#include <oleidl.h>
+
+#include "nsString.h"
+#include "nsTArray.h"
+#include "nsAutoPtr.h"
+#include "nsDataObj.h"
+#include "mozilla/Attributes.h"
+
+class CEnumFormatEtc;
+
+#define MULTI_MIME "Mozilla/IDataObjectCollectionFormat"
+
+EXTERN_C const IID IID_IDataObjCollection;
+
+// An interface to make sure we have the right kind of object for D&D
+// this way we can filter out collection objects that aren't ours
+class nsIDataObjCollection : public IUnknown {
+public:
+  
+};
+
+/*
+ * This ole registered class is used to facilitate drag-drop of objects which
+ * can be adapted by an object derived from CfDragDrop. The CfDragDrop is
+ * associated with instances via SetDragDrop().
+ */
+ 
+class nsDataObjCollection MOZ_FINAL : public nsIDataObjCollection, public nsDataObj
+{
+  public:
+    nsDataObjCollection();
+    ~nsDataObjCollection();
+
+  public: // IUnknown methods - see iunknown.h for documentation
+    STDMETHODIMP_(ULONG) AddRef        ();
+    STDMETHODIMP       QueryInterface(REFIID, void**);
+    STDMETHODIMP_(ULONG) Release       ();
+
+  public: // DataGet and DataSet helper methods
+    virtual HRESULT AddSetFormat(FORMATETC&  FE);
+    virtual HRESULT AddGetFormat(FORMATETC&  FE);
+
+    virtual HRESULT GetFile(LPFORMATETC pFE, LPSTGMEDIUM pSTM);
+    virtual HRESULT GetText(LPFORMATETC pFE, LPSTGMEDIUM pSTM);
+    virtual HRESULT GetFileDescriptors(LPFORMATETC pFE, LPSTGMEDIUM pSTM);
+    virtual HRESULT GetFileContents(LPFORMATETC pFE, LPSTGMEDIUM pSTM);
+    virtual HRESULT GetFirstSupporting(LPFORMATETC pFE, LPSTGMEDIUM pSTM);
+
+    // support for clipboard
+    void AddDataFlavor(const char * aDataFlavor, LPFORMATETC aFE);
+
+    // from nsPIDataObjCollection
+    void AddDataObject(IDataObject * aDataObj);
+    int32_t GetNumDataObjects() { return mDataObjects.Length(); }
+    nsDataObj* GetDataObjectAt(uint32_t aItem)
+            { return mDataObjects.SafeElementAt(aItem, nsRefPtr<nsDataObj>()); }
+
+    // Return the registered OLE class ID of this object's CfDataObj.
+    CLSID GetClassID() const;
+
+  public:
+    // Store data in pSTM according to the format specified by pFE, if the
+    // format is supported (supported formats are specified in CfDragDrop::
+    // GetFormats) and return NOERROR; otherwise return DATA_E_FORMATETC. It
+    // is the callers responsibility to free pSTM if NOERROR is returned.
+    STDMETHODIMP GetData  (LPFORMATETC pFE, LPSTGMEDIUM pSTM);
+
+    // Similar to GetData except that the caller allocates the structure
+    // referenced by pSTM.
+    STDMETHODIMP GetDataHere (LPFORMATETC pFE, LPSTGMEDIUM pSTM);
+
+    // Returns S_TRUE if this object supports the format specified by pSTM,
+    // S_FALSE otherwise.
+    STDMETHODIMP QueryGetData (LPFORMATETC pFE);
+
+    // Set pCanonFE to the canonical format of pFE if one exists and return
+    // NOERROR, otherwise return DATA_S_SAMEFORMATETC. A canonical format
+    // implies an identical rendering.
+    STDMETHODIMP GetCanonicalFormatEtc (LPFORMATETC pFE, LPFORMATETC pCanonFE);
+
+    // Set this objects data according to the format specified by pFE and
+    // the storage medium specified by pSTM and return NOERROR, if the format
+    // is supported. If release is TRUE this object must release the storage
+    // associated with pSTM.
+    STDMETHODIMP SetData  (LPFORMATETC pFE, LPSTGMEDIUM pSTM, BOOL release);
+
+    // Set ppEnum to an IEnumFORMATETC object which will iterate all of the
+    // data formats that this object supports. direction is either DATADIR_GET
+    // or DATADIR_SET.
+    STDMETHODIMP EnumFormatEtc  (DWORD direction, LPENUMFORMATETC* ppEnum);
+
+    // Set up an advisory connection to this object based on the format specified
+    // by pFE, flags, and the pAdvise. Set pConn to the established advise
+    // connection.
+    STDMETHODIMP DAdvise  (LPFORMATETC pFE, DWORD flags, LPADVISESINK pAdvise,
+                   DWORD* pConn);
+
+    // Turn off advising of a previous call to DAdvise which set pConn.
+    STDMETHODIMP DUnadvise (DWORD pConn);
+
+    // Set ppEnum to an IEnumSTATDATA object which will iterate over the
+    // existing objects which have established advisory connections to this
+      // object.
+    STDMETHODIMP EnumDAdvise (LPENUMSTATDATA *ppEnum);
+
+  public:
+    // Set the adapter to dragDrop 
+    //void SetDragDrop(CfDragDrop& dragDrop);
+
+    // Return the adapter
+    //CfDragDrop& GetDragDrop() const;
+
+  protected:
+    BOOL FormatsMatch(const FORMATETC& source, const FORMATETC& target) const;
+
+    ULONG m_cRef;              // the reference count
+
+    // nsDataObjCollection owns and ref counts CEnumFormatEtc
+    CEnumFormatEtc   * m_enumFE;
+
+    nsTArray<nsRefPtr<nsDataObj> > mDataObjects;
+    
+    BOOL mIsAsyncMode;
+    BOOL mIsInOperation;
+};
+
+#endif  //