/* -*- 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 <climits>

#include <set>

#include <svx/UnoNamespaceMap.hxx>

#include <com/sun/star/container/XNameAccess.hpp>

#include <com/sun/star/lang/XServiceInfo.hpp>

#include <comphelper/sequence.hxx>

#include <cppuhelper/implbase.hxx>

#include <cppuhelper/supportsservice.hxx>

#include <svl/itempool.hxx>

#include <editeng/xmlcnitm.hxx>

using namespace ::cppu;

using namespace ::com::sun::star;

using namespace ::com::sun::star::uno;

using namespace ::com::sun::star::container;

using namespace ::com::sun::star::lang;

namespace svx

{

    namespace {

    /** implements a component to export namespaces of all SvXMLAttrContainerItem inside

        one or two pools with a variable count of which ids.

    */

    class NamespaceMap : public WeakImplHelper< XNameAccess, XServiceInfo >

    {

    private:

        const sal_uInt16* mpWhichIds;

        SfxItemPool* mpPool;

    public:

        NamespaceMap( const sal_uInt16* pWhichIds, SfxItemPool* pPool );

        // XNameAccess

        virtual Any SAL_CALL getByName( const OUString& aName ) override;

        virtual Sequence< OUString > SAL_CALL getElementNames(  ) override;

        virtual sal_Bool SAL_CALL hasByName( const OUString& aName ) override;

        // XElementAccess

        virtual Type SAL_CALL getElementType(  ) override;

        virtual sal_Bool SAL_CALL hasElements(  ) override;

        // XServiceInfo

        virtual OUString SAL_CALL getImplementationName(  ) override;

        virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;

        virtual Sequence< OUString > SAL_CALL getSupportedServiceNames(  ) override;

    };

    }

    Reference< XInterface > NamespaceMap_createInstance( const sal_uInt16* pWhichIds, SfxItemPool* pPool )

    {

        return getXWeak(new NamespaceMap( pWhichIds, pPool ));

    }

    static Sequence< OUString > NamespaceMap_getSupportedServiceNames()

        noexcept

    {

        Sequence<OUString> aSupportedServiceNames { u"com.sun.star.xml.NamespaceMap"_ustr };

        return aSupportedServiceNames;

    }

    static OUString NamespaceMap_getImplementationName()

        noexcept

    {

        return u"com.sun.star.comp.Svx.NamespaceMap"_ustr;

    }

    namespace {

    class NamespaceIteratorImpl

    {

    private:

        SfxItemPool* mpPool;

        const sal_uInt16* mpWhichId;

        std::vector<const SvXMLAttrContainerItem*> mvItems;

        sal_Int32 mnItem;

        const SvXMLAttrContainerItem* mpCurrentAttr;

        sal_uInt16 mnCurrentAttr;

    public:

        NamespaceIteratorImpl( const sal_uInt16* pWhichIds, SfxItemPool* pPool );

        bool next( OUString& rPrefix, OUString& rURL );

    };

    }

}

using namespace ::svx;

NamespaceIteratorImpl::NamespaceIteratorImpl( const sal_uInt16* pWhichIds, SfxItemPool* pPool )

{

    mpPool = pPool;

    mpCurrentAttr = nullptr;

    mnCurrentAttr = 0;

    mpWhichId = pWhichIds;

    mnItem = -1;

    if (mpWhichId && (0 != *mpWhichId) && mpPool)

    {

        ItemSurrogates aSurrogates = mpPool->GetItemSurrogates(*mpWhichId);

        mvItems.reserve(aSurrogates.size());

        for (const SfxPoolItem* pItem : aSurrogates)

            mvItems.push_back(static_cast<const SvXMLAttrContainerItem*>(pItem));

    }

}

bool NamespaceIteratorImpl::next( OUString& rPrefix, OUString& rURL )

{

    // we still need to process the current attribute

    if( mpCurrentAttr && (mnCurrentAttr != USHRT_MAX) )

    {

        rPrefix = mpCurrentAttr->GetPrefix( mnCurrentAttr );

        rURL = mpCurrentAttr->GetNamespace( mnCurrentAttr );

        mnCurrentAttr = mpCurrentAttr->GetNextNamespaceIndex( mnCurrentAttr );

        return true;

    }

    // we need the next namespace item

    mpCurrentAttr = nullptr;

    mnItem++;

    // are we finished with the current whichid?

    if( mnItem == static_cast<sal_Int32>(mvItems.size()) )

    {

        mpWhichId++;

        // are we finished with the current pool?

        if( 0 == *mpWhichId )

            return false;

        mnItem = -1;

        mvItems.clear();

        if (mpPool)

        {

            ItemSurrogates aSurrogates = mpPool->GetItemSurrogates(*mpWhichId);

            mvItems.reserve(aSurrogates.size());

            for (const SfxPoolItem* pItem2 : aSurrogates)

                mvItems.push_back(static_cast<const SvXMLAttrContainerItem*>(pItem2));

        }

        return next( rPrefix, rURL );

    }

    auto pItem = mvItems[mnItem];

    // get that item and see if there namespaces inside

    if( pItem->GetAttrCount() > 0 )

    {

        mpCurrentAttr = pItem;

        mnCurrentAttr = pItem->GetFirstNamespaceIndex();

    }

    return next( rPrefix, rURL );

}

NamespaceMap::NamespaceMap( const sal_uInt16* pWhichIds, SfxItemPool* pPool )

: mpWhichIds( pWhichIds ), mpPool( pPool )

{

}

// XNameAccess

Any SAL_CALL NamespaceMap::getByName( const OUString& aName )

{

    NamespaceIteratorImpl aIter( mpWhichIds, mpPool );

    OUString aPrefix;

    OUString aURL;

    bool bFound;

    do

    {

        bFound = aIter.next( aPrefix, aURL );

    }

    while( bFound && (aPrefix != aName ) );

    if( !bFound )

        throw NoSuchElementException();

    return Any( aURL );

}

Sequence< OUString > SAL_CALL NamespaceMap::getElementNames()

{

    NamespaceIteratorImpl aIter( mpWhichIds, mpPool );

    OUString aPrefix;

    OUString aURL;

    std::set< OUString > aPrefixSet;

    while( aIter.next( aPrefix, aURL ) )

        aPrefixSet.insert( aPrefix );

    return comphelper::containerToSequence(aPrefixSet);

}

sal_Bool SAL_CALL NamespaceMap::hasByName( const OUString& aName )

{

    NamespaceIteratorImpl aIter( mpWhichIds, mpPool );

    OUString aPrefix;

    OUString aURL;

    bool bFound;

    do

    {

        bFound = aIter.next( aPrefix, aURL );

    }

    while( bFound && (aPrefix != aName ) );

    return bFound;

}

// XElementAccess

Type SAL_CALL NamespaceMap::getElementType()

{

    return ::cppu::UnoType<OUString>::get();

}

sal_Bool SAL_CALL NamespaceMap::hasElements()

{

    NamespaceIteratorImpl aIter( mpWhichIds, mpPool );

    OUString aPrefix;

    OUString aURL;

    return aIter.next( aPrefix, aURL );

}

// XServiceInfo

OUString SAL_CALL NamespaceMap::getImplementationName(  )

{

    return NamespaceMap_getImplementationName();

}

sal_Bool SAL_CALL NamespaceMap::supportsService( const OUString& serviceName )

{

    return cppu::supportsService( this, serviceName );

}

Sequence< OUString > SAL_CALL NamespaceMap::getSupportedServiceNames(  )

{

    return NamespaceMap_getSupportedServiceNames();

}

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