gecko-dev/widget/windows/nsDataObjCollection.h

168 lines
6.4 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Kyle Huey <me@kylehuey.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef _NSDATAOBJCOLLECTION_H_
#define _NSDATAOBJCOLLECTION_H_
#include <oleidl.h>
#include "nsString.h"
#include "nsTArray.h"
#include "nsAutoPtr.h"
#include "nsDataObj.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 : 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);
PRInt32 GetNumDataObjects() { return mDataObjects.Length(); }
nsDataObj* GetDataObjectAt(PRUint32 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 //