/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtGui module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include "qdnd_p.h"+
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+
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#if !(defined(QT_NO_DRAGANDDROP) && defined(QT_NO_CLIPBOARD))+
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+
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#if defined(Q_OS_WINCE)+
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#include <shlobj.h>+
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#include "qguifunctions_wince.h"+
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#endif+
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+
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QT_BEGIN_NAMESPACE+
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+
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QOleEnumFmtEtc::QOleEnumFmtEtc(const QVector<FORMATETC> &fmtetcs)+
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{+
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    m_isNull = false;+
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    m_dwRefs = 1;+
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    m_nIndex = 0;+
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+
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    for (int idx = 0; idx < fmtetcs.count(); ++idx) {+
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        LPFORMATETC destetc = new FORMATETC();+
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        if (copyFormatEtc(destetc, (LPFORMATETC)&(fmtetcs.at(idx)))) {+
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            m_lpfmtetcs.append(destetc);+
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        } else {+
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            m_isNull = true;+
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            delete destetc;+
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            break;+
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        }+
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    }+
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}+
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+
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QOleEnumFmtEtc::QOleEnumFmtEtc(const QVector<LPFORMATETC> &lpfmtetcs)+
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{+
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    m_isNull = false;+
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    m_dwRefs = 1;+
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    m_nIndex = 0;+
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+
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    for (int idx = 0; idx < lpfmtetcs.count(); ++idx) {+
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        LPFORMATETC srcetc = lpfmtetcs.at(idx);+
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        LPFORMATETC destetc = new FORMATETC();+
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        if (copyFormatEtc(destetc, srcetc)) {+
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            m_lpfmtetcs.append(destetc);+
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        } else {+
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            m_isNull = true;+
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            delete destetc;+
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            break;+
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        }+
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    }+
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}+
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+
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QOleEnumFmtEtc::~QOleEnumFmtEtc()+
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{+
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    LPMALLOC pmalloc;+
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+
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#if !defined(Q_OS_WINCE)+
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    if (CoGetMalloc(MEMCTX_TASK, &pmalloc) == NOERROR) {+
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#else+
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    if (SHGetMalloc(&pmalloc) == NOERROR) {+
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#endif+
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        for (int idx = 0; idx < m_lpfmtetcs.count(); ++idx) {+
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            LPFORMATETC tmpetc = m_lpfmtetcs.at(idx);+
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            if (tmpetc->ptd)+
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                pmalloc->Free(tmpetc->ptd);+
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            delete tmpetc;+
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        }+
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+
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        pmalloc->Release();+
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    }+
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    m_lpfmtetcs.clear();+
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}+
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+
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bool QOleEnumFmtEtc::isNull() const+
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{+
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    return m_isNull;+
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}+
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+
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// IUnknown methods+
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STDMETHODIMP+
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QOleEnumFmtEtc::QueryInterface(REFIID riid, void FAR* FAR* ppvObj)+
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{+
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    if (riid == IID_IUnknown || riid == IID_IEnumFORMATETC) {+
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        *ppvObj = this;+
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        AddRef();+
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        return NOERROR;+
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    }+
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    *ppvObj = NULL;+
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    return ResultFromScode(E_NOINTERFACE);+
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}+
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+
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STDMETHODIMP_(ULONG)+
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QOleEnumFmtEtc::AddRef(void)+
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{+
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    return ++m_dwRefs;+
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}+
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+
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STDMETHODIMP_(ULONG)+
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QOleEnumFmtEtc::Release(void)+
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{+
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    if (--m_dwRefs == 0) {+
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        delete this;+
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        return 0;+
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    }+
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    return m_dwRefs;+
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}+
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+
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// IEnumFORMATETC methods+
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STDMETHODIMP+
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QOleEnumFmtEtc::Next(ULONG celt, LPFORMATETC rgelt, ULONG FAR* pceltFetched)+
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{+
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    ULONG i=0;+
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    ULONG nOffset;+
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+
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    if (rgelt == NULL)+
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        return ResultFromScode(E_INVALIDARG);+
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+
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    while (i < celt) {+
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        nOffset = m_nIndex + i;+
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+
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        if (nOffset < ULONG(m_lpfmtetcs.count())) {+
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            copyFormatEtc((LPFORMATETC)&(rgelt[i]), m_lpfmtetcs.at(nOffset));+
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            i++;+
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        } else {+
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            break;+
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        }+
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    }+
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+
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    m_nIndex += (WORD)i;+
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+
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    if (pceltFetched != NULL)+
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        *pceltFetched = i;+
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+
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    if (i != celt)+
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        return ResultFromScode(S_FALSE);+
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+
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    return NOERROR;+
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}+
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+
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STDMETHODIMP+
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QOleEnumFmtEtc::Skip(ULONG celt)+
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{+
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    ULONG i=0;+
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    ULONG nOffset;+
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+
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    while (i < celt) {+
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        nOffset = m_nIndex + i;+
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+
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        if (nOffset < ULONG(m_lpfmtetcs.count())) {+
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            i++;+
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        } else {+
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            break;+
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        }+
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    }+
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+
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    m_nIndex += (WORD)i;+
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+
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    if (i != celt)+
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        return ResultFromScode(S_FALSE);+
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+
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    return NOERROR;+
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}+
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+
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STDMETHODIMP+
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QOleEnumFmtEtc::Reset()+
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{+
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    m_nIndex = 0;+
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    return NOERROR;+
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}+
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+
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STDMETHODIMP+
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QOleEnumFmtEtc::Clone(LPENUMFORMATETC FAR* newEnum)+
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{+
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    if (newEnum == NULL)+
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        return ResultFromScode(E_INVALIDARG);+
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+
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    QOleEnumFmtEtc *result = new QOleEnumFmtEtc(m_lpfmtetcs);+
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    result->m_nIndex = m_nIndex;+
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+
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    if (result->isNull()) {+
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        delete result;+
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        return ResultFromScode(E_OUTOFMEMORY);+
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    } else {+
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        *newEnum = result;+
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    }+
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+
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    return NOERROR;+
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}+
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+
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bool QOleEnumFmtEtc::copyFormatEtc(LPFORMATETC dest, LPFORMATETC src) const+
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{+
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    if (dest == NULL || src == NULL)+
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        return false;+
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+
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    *dest = *src;+
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+
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    if (src->ptd) {+
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        LPVOID pout;+
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        LPMALLOC pmalloc;+
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+
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#if !defined(Q_OS_WINCE)+
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        if (CoGetMalloc(MEMCTX_TASK, &pmalloc) != NOERROR)+
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#else+
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        if (SHGetMalloc(&pmalloc) != NOERROR)+
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#endif+
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            return false;+
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+
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        pout = (LPVOID)pmalloc->Alloc(src->ptd->tdSize);+
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        memcpy(dest->ptd, src->ptd, size_t(src->ptd->tdSize));+
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+
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        pmalloc->Release();+
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    }+
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+
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    return true;+
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}+
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+
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QT_END_NAMESPACE+
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#endif // QT_NO_DRAGANDDROP && QT_NO_CLIPBOARD+
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