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/* -*- 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 "mozilla/RefPtr.h"
#include "nsString.h"
#include "nsTArray.h"
#include "nsDataObj.h"
#include "mozilla/Attributes.h"
#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 final : public nsIDataObjCollection,
public nsDataObj {
public:
nsDataObjCollection();
private:
~nsDataObjCollection() final;
public: // IUnknown methods - see iunknown.h for documentation
STDMETHODIMP_(ULONG) AddRef() final;
STDMETHODIMP QueryInterface(REFIID, void**) final;
STDMETHODIMP_(ULONG) Release() final;
private: // DataGet and DataSet helper methods
HRESULT GetFile(LPFORMATETC pFE, LPSTGMEDIUM pSTM);
HRESULT GetText(LPFORMATETC pFE, LPSTGMEDIUM pSTM);
HRESULT GetFileDescriptors(LPFORMATETC pFE, LPSTGMEDIUM pSTM);
HRESULT GetFileContents(LPFORMATETC pFE, LPSTGMEDIUM pSTM);
HRESULT GetFirstSupporting(LPFORMATETC pFE, LPSTGMEDIUM pSTM);
using nsDataObj::GetFile;
using nsDataObj::GetFileContents;
using nsDataObj::GetText;
// support for clipboard
void AddDataFlavor(const char* aDataFlavor, LPFORMATETC aFE) final;
public: // from nsPIDataObjCollection
void AddDataObject(IDataObject* aDataObj);
int32_t GetNumDataObjects() { return mDataObjects.Length(); }
nsDataObj* GetDataObjectAt(uint32_t aItem) {
return mDataObjects.SafeElementAt(aItem, RefPtr<nsDataObj>());
}
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) final;
// Similar to GetData except that the caller allocates the structure
// referenced by pSTM.
STDMETHODIMP GetDataHere(LPFORMATETC pFE, LPSTGMEDIUM pSTM) final;
// Returns S_TRUE if this object supports the format specified by pSTM,
// S_FALSE otherwise.
STDMETHODIMP QueryGetData(LPFORMATETC pFE) final;
// 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) final;
private:
nsTArray<RefPtr<nsDataObj> > mDataObjects;
};
#endif //
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