/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

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** This file is part of the QtGui module of the Qt Toolkit.

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** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

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****************************************************************************/

#include "qdnd_p.h"

#if !(defined(QT_NO_DRAGANDDROP) && defined(QT_NO_CLIPBOARD))

#if defined(Q_OS_WINCE)

#include <shlobj.h>

#include "qguifunctions_wince.h"

#endif

QT_BEGIN_NAMESPACE

QOleEnumFmtEtc::QOleEnumFmtEtc(const QVector<FORMATETC> &fmtetcs)

{

    m_isNull = false;

    m_dwRefs = 1;

    m_nIndex = 0;

    for (int idx = 0; idx < fmtetcs.count(); ++idx) {

        LPFORMATETC destetc = new FORMATETC();

        if (copyFormatEtc(destetc, (LPFORMATETC)&(fmtetcs.at(idx)))) {

            m_lpfmtetcs.append(destetc);

        } else {

            m_isNull = true;

            delete destetc;

            break;

        }

    }

}

QOleEnumFmtEtc::QOleEnumFmtEtc(const QVector<LPFORMATETC> &lpfmtetcs)

{

    m_isNull = false;

    m_dwRefs = 1;

    m_nIndex = 0;

    for (int idx = 0; idx < lpfmtetcs.count(); ++idx) {

        LPFORMATETC srcetc = lpfmtetcs.at(idx);

        LPFORMATETC destetc = new FORMATETC();

        if (copyFormatEtc(destetc, srcetc)) {

            m_lpfmtetcs.append(destetc);

        } else {

            m_isNull = true;

            delete destetc;

            break;

        }

    }

}

QOleEnumFmtEtc::~QOleEnumFmtEtc()

{

    LPMALLOC pmalloc;

#if !defined(Q_OS_WINCE)

    if (CoGetMalloc(MEMCTX_TASK, &pmalloc) == NOERROR) {

#else

    if (SHGetMalloc(&pmalloc) == NOERROR) {

#endif

        for (int idx = 0; idx < m_lpfmtetcs.count(); ++idx) {

            LPFORMATETC tmpetc = m_lpfmtetcs.at(idx);

            if (tmpetc->ptd)

                pmalloc->Free(tmpetc->ptd);

            delete tmpetc;

        }

        pmalloc->Release();

    }

    m_lpfmtetcs.clear();

}

bool QOleEnumFmtEtc::isNull() const

{

    return m_isNull;

}

// IUnknown methods

STDMETHODIMP

QOleEnumFmtEtc::QueryInterface(REFIID riid, void FAR* FAR* ppvObj)

{

    if (riid == IID_IUnknown || riid == IID_IEnumFORMATETC) {

        *ppvObj = this;

        AddRef();

        return NOERROR;

    }

    *ppvObj = NULL;

    return ResultFromScode(E_NOINTERFACE);

}

STDMETHODIMP_(ULONG)

QOleEnumFmtEtc::AddRef(void)

{

    return ++m_dwRefs;

}

STDMETHODIMP_(ULONG)

QOleEnumFmtEtc::Release(void)

{

    if (--m_dwRefs == 0) {

        delete this;

        return 0;

    }

    return m_dwRefs;

}

// IEnumFORMATETC methods

STDMETHODIMP

QOleEnumFmtEtc::Next(ULONG celt, LPFORMATETC rgelt, ULONG FAR* pceltFetched)

{

    ULONG i=0;

    ULONG nOffset;

    if (rgelt == NULL)

        return ResultFromScode(E_INVALIDARG);

    while (i < celt) {

        nOffset = m_nIndex + i;

        if (nOffset < ULONG(m_lpfmtetcs.count())) {

            copyFormatEtc((LPFORMATETC)&(rgelt[i]), m_lpfmtetcs.at(nOffset));

            i++;

        } else {

            break;

        }

    }

    m_nIndex += (WORD)i;

    if (pceltFetched != NULL)

        *pceltFetched = i;

    if (i != celt)

        return ResultFromScode(S_FALSE);

    return NOERROR;

}

STDMETHODIMP

QOleEnumFmtEtc::Skip(ULONG celt)

{

    ULONG i=0;

    ULONG nOffset;

    while (i < celt) {

        nOffset = m_nIndex + i;

        if (nOffset < ULONG(m_lpfmtetcs.count())) {

            i++;

        } else {

            break;

        }

    }

    m_nIndex += (WORD)i;

    if (i != celt)

        return ResultFromScode(S_FALSE);

    return NOERROR;

}

STDMETHODIMP

QOleEnumFmtEtc::Reset()

{

    m_nIndex = 0;

    return NOERROR;

}

STDMETHODIMP

QOleEnumFmtEtc::Clone(LPENUMFORMATETC FAR* newEnum)

{

    if (newEnum == NULL)

        return ResultFromScode(E_INVALIDARG);

    QOleEnumFmtEtc *result = new QOleEnumFmtEtc(m_lpfmtetcs);

    result->m_nIndex = m_nIndex;

    if (result->isNull()) {

        delete result;

        return ResultFromScode(E_OUTOFMEMORY);

    } else {

        *newEnum = result;

    }

    return NOERROR;

}

bool QOleEnumFmtEtc::copyFormatEtc(LPFORMATETC dest, LPFORMATETC src) const

{

    if (dest == NULL || src == NULL)

        return false;

    *dest = *src;

    if (src->ptd) {

        LPVOID pout;

        LPMALLOC pmalloc;

#if !defined(Q_OS_WINCE)

        if (CoGetMalloc(MEMCTX_TASK, &pmalloc) != NOERROR)

#else

        if (SHGetMalloc(&pmalloc) != NOERROR)

#endif

            return false;

        pout = (LPVOID)pmalloc->Alloc(src->ptd->tdSize);

        memcpy(dest->ptd, src->ptd, size_t(src->ptd->tdSize));

        pmalloc->Release();

    }

    return true;

}

QT_END_NAMESPACE

#endif // QT_NO_DRAGANDDROP && QT_NO_CLIPBOARD