185 lines
6.7 KiB
C++
185 lines
6.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#ifndef _NSDATAOBJCOLLECTION_H_
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#define _NSDATAOBJCOLLECTION_H_
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#include "OLEIDL.H"
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#include "nsString.h"
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#include "nsVoidArray.h"
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class CEnumFormatEtc;
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class nsITransferable;
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#define MULTI_MIME "Mozilla/IDataObjectCollectionFormat"
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#if NOT_YET
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// {6e99c280-d820-11d3-bb6f-bbf26bfe623c}
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EXTERN_C GUID CDECL IID_DATA_OBJ_COLLECTION =
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{ 0x6e99c280, 0xd820, 0x11d3, { 0xbb, 0x6f, 0xbb, 0xf2, 0x6b, 0xfe, 0x62, 0x3c } };
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class nsPIDataObjCollection : IUnknown
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{
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public:
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STDMETHODIMP AddDataObject(IDataObject * aDataObj) = 0;
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STDMETHODIMP GetNumDataObjects(PRInt32* outNum) = 0;
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STDMETHODIMP GetDataObjectAt(PRUint32 aItem, IDataObject** outItem) = 0;
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};
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#endif
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/*
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* This ole registered class is used to facilitate drag-drop of objects which
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* can be adapted by an object derived from CfDragDrop. The CfDragDrop is
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* associated with instances via SetDragDrop().
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*/
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class nsDataObjCollection : public IDataObject //, public nsPIDataObjCollection
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{
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public: // construction, destruction
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nsDataObjCollection();
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~nsDataObjCollection();
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public: // IUnknown methods - see iunknown.h for documentation
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STDMETHODIMP_(ULONG) AddRef ();
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STDMETHODIMP QueryInterface(REFIID, void**);
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STDMETHODIMP_(ULONG) Release ();
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public: // DataGet and DataSet helper methods
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virtual HRESULT AddSetFormat(FORMATETC& FE);
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virtual HRESULT AddGetFormat(FORMATETC& FE);
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virtual HRESULT GetBitmap(FORMATETC& FE, STGMEDIUM& STM);
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virtual HRESULT GetDib (FORMATETC& FE, STGMEDIUM& STM);
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virtual HRESULT GetMetafilePict(FORMATETC& FE, STGMEDIUM& STM);
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virtual HRESULT SetBitmap(FORMATETC& FE, STGMEDIUM& STM);
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virtual HRESULT SetDib (FORMATETC& FE, STGMEDIUM& STM);
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virtual HRESULT SetMetafilePict(FORMATETC& FE, STGMEDIUM& STM);
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// support for clipboard
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void AddDataFlavor(nsString * aDataFlavor, LPFORMATETC aFE);
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void SetTransferable(nsITransferable * aTransferable);
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#if NOT_YET
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// from nsPIDataObjCollection
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STDMETHODIMP AddDataObject(IDataObject * aDataObj);
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STDMETHODIMP GetNumDataObjects(PRInt32* outNum) { *outNum = mDataObjects->Count(); }
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STDMETHODIMP GetDataObjectAt(PRUint32 aItem, IDataObject** outItem) { *outItem = (IDataObject *)mDataObjects->ElementAt(aItem); }
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#endif
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// from nsPIDataObjCollection
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void AddDataObject(IDataObject * aDataObj);
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PRInt32 GetNumDataObjects() { return mDataObjects->Count(); }
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IDataObject* GetDataObjectAt(PRUint32 aItem) { return (IDataObject *)mDataObjects->ElementAt(aItem); }
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// Return the registered OLE class ID of this object's CfDataObj.
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CLSID GetClassID() const;
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public: // IDataObject methods - these are general comments. see CfDragDrop
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// for overriding behavior
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// Store data in pSTM according to the format specified by pFE, if the
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// format is supported (supported formats are specified in CfDragDrop::
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// GetFormats) and return NOERROR; otherwise return DATA_E_FORMATETC. It
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// is the callers responsibility to free pSTM if NOERROR is returned.
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STDMETHODIMP GetData (LPFORMATETC pFE, LPSTGMEDIUM pSTM);
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// Similar to GetData except that the caller allocates the structure
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// referenced by pSTM.
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STDMETHODIMP GetDataHere (LPFORMATETC pFE, LPSTGMEDIUM pSTM);
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// Returns S_TRUE if this object supports the format specified by pSTM,
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// S_FALSE otherwise.
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STDMETHODIMP QueryGetData (LPFORMATETC pFE);
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// Set pCanonFE to the cannonical format of pFE if one exists and return
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// NOERROR, otherwise return DATA_S_SAMEFORMATETC. A cannonical format
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// implies an identical rendering.
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STDMETHODIMP GetCanonicalFormatEtc (LPFORMATETC pFE, LPFORMATETC pCanonFE);
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// Set this objects data according to the format specified by pFE and
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// the storage medium specified by pSTM and return NOERROR, if the format
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// is supported. If release is TRUE this object must release the storage
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// associated with pSTM.
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STDMETHODIMP SetData (LPFORMATETC pFE, LPSTGMEDIUM pSTM, BOOL release);
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// Set ppEnum to an IEnumFORMATETC object which will iterate all of the
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// data formats that this object supports. direction is either DATADIR_GET
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// or DATADIR_SET.
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STDMETHODIMP EnumFormatEtc (DWORD direction, LPENUMFORMATETC* ppEnum);
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// Set up an advisory connection to this object based on the format specified
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// by pFE, flags, and the pAdvise. Set pConn to the established advise
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// connection.
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STDMETHODIMP DAdvise (LPFORMATETC pFE, DWORD flags, LPADVISESINK pAdvise,
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DWORD* pConn);
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// Turn off advising of a previous call to DAdvise which set pConn.
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STDMETHODIMP DUnadvise (DWORD pConn);
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// Set ppEnum to an IEnumSTATDATA object which will iterate over the
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// existing objects which have established advisory connections to this
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// object.
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STDMETHODIMP EnumDAdvise (LPENUMSTATDATA *ppEnum);
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public: // other methods
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// Set the adapter to dragDrop
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//void SetDragDrop(CfDragDrop& dragDrop);
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// Return the adapter
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//CfDragDrop& GetDragDrop() const;
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// Return the total reference counts of all instances of this class.
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static ULONG GetCumRefCount();
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// Return the reference count (which helps determine if another app has
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// released the interface pointer after a drop).
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ULONG GetRefCount() const;
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protected:
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nsString mStringData;
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BOOL FormatsMatch(const FORMATETC& source, const FORMATETC& target) const;
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static ULONG g_cRef; // the cum reference count of all instances
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ULONG m_cRef; // the reference count
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nsVoidArray * mDataFlavors; // we own and its contents
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nsITransferable * mTransferable; // nsDataObjCollection owns and ref counts nsITransferable,
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// the nsITransferable does know anything about the nsDataObjCollection
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CEnumFormatEtc * m_enumFE; // Ownership Rules:
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// nsDataObjCollection owns and ref counts CEnumFormatEtc,
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nsVoidArray * mDataObjects;
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};
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#endif //
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