forked from mirrors/gecko-dev
95 lines
3.4 KiB
C++
95 lines
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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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 "mozilla/RefPtr.h"
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#include "nsString.h"
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#include "nsTArray.h"
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#include "nsDataObj.h"
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#include "mozilla/Attributes.h"
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#define MULTI_MIME "Mozilla/IDataObjectCollectionFormat"
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EXTERN_C const IID IID_IDataObjCollection;
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// An interface to make sure we have the right kind of object for D&D
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// this way we can filter out collection objects that aren't ours
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class nsIDataObjCollection : public IUnknown {
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public:
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};
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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 final : public nsIDataObjCollection, public nsDataObj
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{
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public:
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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 GetFile(LPFORMATETC pFE, LPSTGMEDIUM pSTM);
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virtual HRESULT GetText(LPFORMATETC pFE, LPSTGMEDIUM pSTM);
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virtual HRESULT GetFileDescriptors(LPFORMATETC pFE, LPSTGMEDIUM pSTM);
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virtual HRESULT GetFileContents(LPFORMATETC pFE, LPSTGMEDIUM pSTM);
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virtual HRESULT GetFirstSupporting(LPFORMATETC pFE, LPSTGMEDIUM pSTM);
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using nsDataObj::GetFile;
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using nsDataObj::GetFileContents;
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using nsDataObj::GetText;
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// support for clipboard
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void AddDataFlavor(const char * aDataFlavor, LPFORMATETC aFE);
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// from nsPIDataObjCollection
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void AddDataObject(IDataObject * aDataObj);
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int32_t GetNumDataObjects() { return mDataObjects.Length(); }
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nsDataObj* GetDataObjectAt(uint32_t aItem)
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{ return mDataObjects.SafeElementAt(aItem, RefPtr<nsDataObj>()); }
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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:
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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 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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protected:
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ULONG m_cRef; // the reference count
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nsTArray<RefPtr<nsDataObj> > mDataObjects;
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};
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#endif //
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