/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * 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/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include <svl/itemiter.hxx>
#include <svl/itemset.hxx>

SfxItemIter::SfxItemIter(const SfxItemSet& rItemSet)
    : m_rSet(rItemSet)
{
    if (!m_rSet.m_nCount)
    {
        m_nStart = 0;
        m_nEnd = 0;
    }
    else
    {
        SfxPoolItem const** ppFnd = m_rSet.m_ppItems;

        // Find the first Item that is set
        for (m_nStart = 0; !*(ppFnd + m_nStart); ++m_nStart)
            ; // empty loop
        if (1 < m_rSet.Count())
            for (m_nEnd = m_rSet.TotalCount(); !*(ppFnd + --m_nEnd);)
                ; // empty loop
        else
            m_nEnd = m_nStart;
    }

    m_nCurrent = m_nStart;
}

// Precondition : m_nCurrent < m_nEnd
const SfxPoolItem* SfxItemIter::ImplNextItem()
{
    SfxPoolItem const** ppFnd = m_rSet.m_ppItems;
    do
    {
        m_nCurrent++;
    } while (m_nCurrent < m_nEnd && !*(ppFnd + m_nCurrent));
    return *(ppFnd + m_nCurrent);
}

SfxItemState SfxItemIter::GetItemState(bool bSrchInParent, const SfxPoolItem** ppItem) const
{
    // we have the offset, so use it to profit. It is always valid, so no need
    // to check if smaller than TotalCount()
    SfxItemState eState(m_rSet.GetItemState_ForOffset(m_nCurrent, ppItem));

    // search in parent?
    if (bSrchInParent && nullptr != m_rSet.GetParent()
        && (SfxItemState::UNKNOWN == eState || SfxItemState::DEFAULT == eState))
    {
        // nOffset was only valid for *local* SfxItemSet, need to continue with WhichID
        const sal_uInt16 nWhich(m_rSet.GetWhichByOffset(m_nCurrent));
        eState = m_rSet.GetParent()->GetItemState_ForWhichID(eState, nWhich, true, ppItem);
    }

    return eState;
}

void SfxItemIter::ClearItem()
{
    // we have the offset, so use it to profit. It is always valid, so no need
    // to check if smaller than TotalCount()
    const_cast<SfxItemSet&>(m_rSet).ClearSingleItem_ForOffset(m_nCurrent);
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */