/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/

#ifndef SAX_FASTSERIALIZER_HXX
#define SAX_FASTSERIALIZER_HXX

#include <com/sun/star/xml/sax/XFastSerializer.hpp>
#include <com/sun/star/xml/sax/XFastTokenHandler.hpp>
#include <com/sun/star/lang/XServiceInfo.hpp>
#include <com/sun/star/io/XOutputStream.hpp>
#include <cppuhelper/implbase2.hxx>

#include <stack>
#include <map>

#include <boost/shared_ptr.hpp>

#include "sax/dllapi.h"
#include "sax/fshelper.hxx"

#define SERIALIZER_IMPLEMENTATION_NAME	"com.sun.star.comp.extensions.xml.sax.FastSerializer"
#define SERIALIZER_SERVICE_NAME		"com.sun.star.xml.sax.FastSerializer"

namespace sax_fastparser {

class SAX_DLLPUBLIC FastSaxSerializer : public ::cppu::WeakImplHelper2< ::com::sun::star::xml::sax::XFastSerializer, ::com::sun::star::lang::XServiceInfo >
{
    typedef ::com::sun::star::uno::Sequence< ::sal_Int8 > Int8Sequence;
    typedef ::com::sun::star::uno::Sequence< ::sal_Int32 > Int32Sequence;

public:
    explicit            FastSaxSerializer(  );
    virtual             ~FastSaxSerializer();

    ::com::sun::star::uno::Reference< ::com::sun::star::io::XOutputStream > getOutputStream() {return mxOutputStream;}

    // The implementation details
    static ::com::sun::star::uno::Sequence< ::rtl::OUString > 	getSupportedServiceNames_Static(void);
    static ::rtl::OUString 				                        getImplementationName_Static();

    // XFastSerializer
    virtual void SAL_CALL startDocument(  ) throw (::com::sun::star::xml::sax::SAXException, ::com::sun::star::uno::RuntimeException);
    virtual void SAL_CALL endDocument(  ) throw (::com::sun::star::xml::sax::SAXException, ::com::sun::star::uno::RuntimeException);
    virtual void SAL_CALL startFastElement( ::sal_Int32 Element, const ::com::sun::star::uno::Reference< ::com::sun::star::xml::sax::XFastAttributeList >& Attribs )
        throw (::com::sun::star::xml::sax::SAXException, ::com::sun::star::uno::RuntimeException);
    virtual void SAL_CALL startUnknownElement( const ::rtl::OUString& Namespace, const ::rtl::OUString& Name, const ::com::sun::star::uno::Reference< ::com::sun::star::xml::sax::XFastAttributeList >& Attribs )
        throw (::com::sun::star::xml::sax::SAXException, ::com::sun::star::uno::RuntimeException);
    virtual void SAL_CALL endFastElement( ::sal_Int32 Element )
        throw (::com::sun::star::xml::sax::SAXException, ::com::sun::star::uno::RuntimeException);
    virtual void SAL_CALL endUnknownElement( const ::rtl::OUString& Namespace, const ::rtl::OUString& Name )
        throw (::com::sun::star::xml::sax::SAXException, ::com::sun::star::uno::RuntimeException);
    virtual void SAL_CALL singleFastElement( ::sal_Int32 Element, const ::com::sun::star::uno::Reference< ::com::sun::star::xml::sax::XFastAttributeList >& Attribs )
        throw (::com::sun::star::xml::sax::SAXException, ::com::sun::star::uno::RuntimeException);
    virtual void SAL_CALL singleUnknownElement( const ::rtl::OUString& Namespace, const ::rtl::OUString& Name, const ::com::sun::star::uno::Reference< ::com::sun::star::xml::sax::XFastAttributeList >& Attribs )
        throw (::com::sun::star::xml::sax::SAXException, ::com::sun::star::uno::RuntimeException);
    virtual void SAL_CALL characters( const ::rtl::OUString& aChars )
        throw (::com::sun::star::xml::sax::SAXException, ::com::sun::star::uno::RuntimeException);
    virtual void SAL_CALL setOutputStream( const ::com::sun::star::uno::Reference< ::com::sun::star::io::XOutputStream >& xOutputStream )
        throw (::com::sun::star::uno::RuntimeException);
    virtual void SAL_CALL setFastTokenHandler( const ::com::sun::star::uno::Reference< ::com::sun::star::xml::sax::XFastTokenHandler >& xFastTokenHandler )
        throw (::com::sun::star::uno::RuntimeException);

    // XServiceInfo
    virtual ::rtl::OUString SAL_CALL getImplementationName(  ) throw ( ::com::sun::star::uno::RuntimeException );
    virtual sal_Bool SAL_CALL supportsService( const ::rtl::OUString& ServiceName ) throw ( ::com::sun::star::uno::RuntimeException );
    virtual ::com::sun::star::uno::Sequence< ::rtl::OUString > SAL_CALL getSupportedServiceNames(  ) throw ( ::com::sun::star::uno::RuntimeException );

    // C++ helpers
    virtual void SAL_CALL writeId( ::sal_Int32 Element );

    static ::rtl::OUString escapeXml( const ::rtl::OUString& s );

public:
    /** From now on, don't write directly to the stream, but to top of a stack.

        This is to be able to change the order of the data being written.
        If you need to write eg.
          p, r, rPr, [something], /rPr, t, [text], /r, /p,
        but get it in order
          p, r, t, [text], /t, rPr, [something], /rPr, /r, /p,
        simply do
          p, r, mark(), t, [text], /t, mark(), rPr, [something], /rPr,
          mergeTopMarks( true ), mergeTopMarks(), /r, /p
        and you are done.
     */
    void mark( Int32Sequence aOrder = Int32Sequence() );

    /** Merge 2 topmost marks.

        There are 3 possibilities - prepend the top before the second top-most
        mark, append it, or append it later; prepending brings the possibility
        to switch parts of the output, appending later allows to write some
        output in advance.

        Writes the result to the output stream if the mark stack becomes empty
        by the operation.

        When the MERGE_MARKS_POSTPONE is specified, the merge happens just
        before the next merge.

        @see mark()
     */
    void mergeTopMarks( sax_fastparser::MergeMarksEnum eMergeType = sax_fastparser::MERGE_MARKS_APPEND );

private:
    ::com::sun::star::uno::Reference< ::com::sun::star::io::XOutputStream > mxOutputStream;
    ::com::sun::star::uno::Reference< ::com::sun::star::xml::sax::XFastTokenHandler > mxFastTokenHandler;

    class ForMerge
    {
        Int8Sequence maData;
        Int8Sequence maPostponed;

    public:
        ForMerge() : maData(), maPostponed() {}
        virtual ~ForMerge() {}

        virtual void setCurrentElement( ::sal_Int32 /*nToken*/ ) {}
        virtual Int8Sequence& getData();
#if DEBUG
        virtual void print();
#endif

        virtual void prepend( const Int8Sequence &rWhat );
        virtual void append( const Int8Sequence &rWhat );
        void postpone( const Int8Sequence &rWhat );

    protected:
        void resetData( );
        static void merge( Int8Sequence &rTop, const Int8Sequence &rMerge, bool bAppend );
    };

    class ForSort : public ForMerge
    {
        std::map< ::sal_Int32, Int8Sequence > maData;
        sal_Int32 mnCurrentElement;

        Int32Sequence maOrder;

    public:
        ForSort( Int32Sequence aOrder ) :
            ForMerge(),
            maData(),
            mnCurrentElement( 0 ),
            maOrder( aOrder ) {}

        void setCurrentElement( ::sal_Int32 nToken );

        virtual Int8Sequence& getData();

#if DEBUG
        virtual void print();
#endif

        virtual void prepend( const Int8Sequence &rWhat );
        virtual void append( const Int8Sequence &rWhat );
    private:
        void sort();
    };

#if DEBUG
        void printMarkStack( );
#endif

    ::std::stack< boost::shared_ptr< ForMerge > > maMarkStack;

    void writeFastAttributeList( const ::com::sun::star::uno::Reference< ::com::sun::star::xml::sax::XFastAttributeList >& Attribs );
    void write( const ::rtl::OUString& s );

protected:
    /** Forward the call to the output stream, or write to the stack.

        The latter in the case that we are inside a mark().
     */
    void writeBytes( const ::com::sun::star::uno::Sequence< ::sal_Int8 >& aData ) throw (::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
};

} // namespace sax_fastparser

#endif

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