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123 lines
3.8 KiB
C++
123 lines
3.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2009
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Jim Mathies <jmathies@mozilla.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef IEnumeFE_h__
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#define IEnumeFE_h__
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/*
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* CEnumFormatEtc - implements IEnumFORMATETC
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*/
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#include <ole2.h>
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#include "nsTArray.h"
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// FORMATETC container
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class FormatEtc
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{
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public:
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FormatEtc() { memset(&mFormat, 0, sizeof(FORMATETC)); }
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FormatEtc(const FormatEtc& copy) { CopyIn(©.mFormat); }
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~FormatEtc() { if (mFormat.ptd) CoTaskMemFree(mFormat.ptd); }
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void CopyIn(const FORMATETC *aSrc) {
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if (!aSrc) {
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memset(&mFormat, 0, sizeof(FORMATETC));
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return;
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}
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mFormat = *aSrc;
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if (aSrc->ptd) {
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mFormat.ptd = (DVTARGETDEVICE*)CoTaskMemAlloc(sizeof(DVTARGETDEVICE));
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*(mFormat.ptd) = *(aSrc->ptd);
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}
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}
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void CopyOut(LPFORMATETC aDest) {
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if (!aDest)
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return;
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*aDest = mFormat;
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if (mFormat.ptd) {
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aDest->ptd = (DVTARGETDEVICE*)CoTaskMemAlloc(sizeof(DVTARGETDEVICE));
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*(aDest->ptd) = *(mFormat.ptd);
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}
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}
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private:
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FORMATETC mFormat;
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};
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/*
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* CEnumFormatEtc is created within IDataObject::EnumFormatEtc. This object lives
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* on its own, that is, QueryInterface only knows IUnknown and IEnumFormatEtc,
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* nothing more. We still use an outer unknown for reference counting, because as
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* long as this enumerator lives, the data object should live, thereby keeping the
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* application up.
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*/
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class CEnumFormatEtc : public IEnumFORMATETC
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{
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public:
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CEnumFormatEtc(nsTArray<FormatEtc>& aArray);
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CEnumFormatEtc();
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~CEnumFormatEtc();
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// IUnknown impl.
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STDMETHODIMP QueryInterface(REFIID riid, LPVOID *ppv);
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STDMETHODIMP_(ULONG) AddRef();
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STDMETHODIMP_(ULONG) Release();
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// IEnumFORMATETC impl.
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STDMETHODIMP Next(ULONG aMaxToFetch, FORMATETC *aResult, ULONG *aNumFetched);
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STDMETHODIMP Skip(ULONG aSkipNum);
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STDMETHODIMP Reset();
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STDMETHODIMP Clone(LPENUMFORMATETC *aResult); // Addrefs
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// Utils
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void AddFormatEtc(LPFORMATETC aFormat);
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private:
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nsTArray<FormatEtc> mFormatList; // Formats
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ULONG mRefCnt; // Object reference count
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ULONG mCurrentIdx; // Current element
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void SetIndex(PRUint32 aIdx);
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};
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#endif //_IENUMFE_H_
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