/* -*- 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 <xml/xmlnamespaces.hxx>

#include <com/sun/star/xml/sax/SAXException.hpp>

using namespace ::com::sun::star::xml::sax;

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

namespace framework

{

void XMLNamespaces::addNamespace( const OUString& aName, const OUString& aValue )

{

    NamespaceMap::iterator p;

    OUString aNamespaceName( aName );

    // delete preceding "xmlns"

    if (std::u16string_view rest; aNamespaceName.startsWith("xmlns", &rest))

    {

        if (rest.empty())

        {

            aNamespaceName.clear();

        }

        else if (rest.size() > 1)

        {

            aNamespaceName = rest.substr(1);

        }

        else

        {

            // a xml namespace without name is not allowed (e.g. "xmlns:" )

            throw SAXException( u"A xml namespace without name is not allowed!"_ustr, Reference< XInterface >(), Any() );

        }

    }

    if ( aValue.isEmpty() && !aNamespaceName.isEmpty() )

    {

        // namespace should be reset - as xml draft states this is only allowed

        // for the default namespace - check and throw exception if check fails

        throw SAXException( u"Clearing xml namespace only allowed for default namespace!"_ustr, Reference< XInterface >(), Any() );

    }

    if ( aNamespaceName.isEmpty() )

        m_aDefaultNamespace = aValue;

    else

    {

        p = m_aNamespaceMap.find( aNamespaceName );

        if ( p != m_aNamespaceMap.end() )

        {

            // replace current namespace definition

            m_aNamespaceMap.erase( p );

            m_aNamespaceMap.emplace( aNamespaceName, aValue );

        }

        else

        {

            m_aNamespaceMap.emplace( aNamespaceName, aValue );

        }

    }

}

OUString XMLNamespaces::applyNSToAttributeName( const OUString& aName ) const

{

    // xml draft: there is no default namespace for attributes!

    int index;

    if (( index = aName.indexOf( ':' )) > 0 )

    {

        if ( aName.getLength() <= index+1 )

        {

            // attribute with namespace but without name "namespace:" is not allowed!!

            throw SAXException( u"Attribute has no name only preceding namespace!"_ustr, Reference< XInterface >(), Any() );

        }

        OUString aAttributeName = getNamespaceValue( aName.copy( 0, index )) + "^" + aName.subView( index+1);

        return aAttributeName;

    }

    return aName;

}

OUString XMLNamespaces::applyNSToElementName( const OUString& aName ) const

{

    // xml draft: element names can have a default namespace

    int         index = aName.indexOf( ':' );

    OUString aNamespace;

    OUString aElementName = aName;

    if ( index > 0 )

        aNamespace = getNamespaceValue( aName.copy( 0, index ) );

    else

        aNamespace = m_aDefaultNamespace;

    if ( !aNamespace.isEmpty() )

    {

        aElementName = aNamespace + "^";

    }

    else

        return aName;

    if ( index > 0 )

    {

        if ( aName.getLength() <= index+1 )

        {

            // attribute with namespace but without a name is not allowed (e.g. "cfg:" )

            throw SAXException( u"Attribute has no name only preceding namespace!"_ustr, Reference< XInterface >(), Any() );

        }

        aElementName += aName.subView( index+1 );

    }

    else

        aElementName += aName;

    return aElementName;

}

OUString const & XMLNamespaces::getNamespaceValue( const OUString& aNamespace ) const

{

    if ( aNamespace.isEmpty() )

        return m_aDefaultNamespace;

    else

    {

        NamespaceMap::const_iterator p = m_aNamespaceMap.find( aNamespace );

        if ( p == m_aNamespaceMap.end() )

        {

            // namespace not defined => throw exception!

            throw SAXException( u"XML namespace used but not defined!"_ustr, Reference< XInterface >(), Any() );

        }

        return p->second;

    }

}

}

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