/**************************************************************
 * 
 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/



// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_sdext.hxx"

#include "style.hxx"
#include "genericelements.hxx"
#include "xmlemitter.hxx"
#include "pdfiprocessor.hxx"
#include <rtl/ustrbuf.hxx>

#include <algorithm>

using namespace rtl;
using namespace pdfi;

#define USTR(x) rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( x ) )

StyleContainer::StyleContainer() :
    m_nNextId( 1 )
{
}

sal_Int32 StyleContainer::impl_getStyleId( const Style& rStyle, bool bSubStyle )
{
    sal_Int32 nRet = -1;
    
    // construct HashedStyle to find or insert
    HashedStyle aSearchStyle;
    aSearchStyle.Name                   = rStyle.Name;
    aSearchStyle.Properties             = rStyle.Properties;
    aSearchStyle.Contents               = rStyle.Contents;
    aSearchStyle.ContainedElement       = rStyle.ContainedElement;
    for( unsigned int n = 0; n < rStyle.SubStyles.size(); ++n )
        aSearchStyle.SubStyles.push_back( impl_getStyleId( *rStyle.SubStyles[n], true ) );
         
    std::hash_map< HashedStyle, sal_Int32, StyleHash >::iterator it =
        m_aStyleToId.find( aSearchStyle );
    
    if( it != m_aStyleToId.end() )
    {
        nRet = it->second;
        HashedStyle& rFound = m_aIdToStyle[ nRet ];
        // increase refcount on this style
        rFound.RefCount++;
        if( ! bSubStyle )
            rFound.IsSubStyle = false;
    }
    else
    {
        nRet = m_nNextId++;
        // create new style
        HashedStyle& rNew = m_aIdToStyle[ nRet ];
        rNew = aSearchStyle;
        rNew.RefCount           = 1;
        rNew.IsSubStyle         = bSubStyle;
        // fill the style hash to find the id
        m_aStyleToId[ rNew ] = nRet;
    }
    return nRet;
}

sal_Int32 StyleContainer::getStandardStyleId( const rtl::OString& rName )
{
    PropertyMap aProps;
    aProps[ USTR( "style:family" ) ] = rtl::OStringToOUString( rName, RTL_TEXTENCODING_UTF8 );
    aProps[ USTR( "style:name" ) ] = USTR( "standard" );

    Style aStyle( "style:style", aProps );
    return getStyleId( aStyle );
}

const PropertyMap* StyleContainer::getProperties( sal_Int32 nStyleId ) const
{
    std::hash_map< sal_Int32, HashedStyle >::const_iterator it =
        m_aIdToStyle.find( nStyleId );
    return it != m_aIdToStyle.end() ? &(it->second.Properties) : NULL;
}

sal_Int32 StyleContainer::setProperties( sal_Int32 nStyleId, const PropertyMap& rNewProps )
{
    sal_Int32 nRet = -1;
    std::hash_map< sal_Int32, HashedStyle >::iterator it =
        m_aIdToStyle.find( nStyleId );
    if( it != m_aIdToStyle.end() )
    {
        if( it->second.RefCount == 1 )
        {
            nRet = it->first;
            // erase old hash to id mapping
            m_aStyleToId.erase( it->second );
            // change properties
            it->second.Properties = rNewProps;
            // fill in new hash to id mapping
            m_aStyleToId[ it->second ] = nRet;
        }
        else
        {
            // decrease refcound on old instance
            it->second.RefCount--;
            // acquire new HashedStyle
            HashedStyle aSearchStyle;
            aSearchStyle.Name                   = it->second.Name;
            aSearchStyle.Properties             = rNewProps;
            aSearchStyle.Contents               = it->second.Contents;
            aSearchStyle.ContainedElement       = it->second.ContainedElement;
            aSearchStyle.SubStyles              = it->second.SubStyles;
            aSearchStyle.IsSubStyle             = it->second.IsSubStyle;
            
            // find out whether this new style already exists
            std::hash_map< HashedStyle, sal_Int32, StyleHash >::iterator new_it =
                m_aStyleToId.find( aSearchStyle );
            if( new_it != m_aStyleToId.end() )
            {
                nRet = new_it->second;
                m_aIdToStyle[ nRet ].RefCount++;
            }
            else
            {
                nRet = m_nNextId++;
                // create new style with new id
                HashedStyle& rNew = m_aIdToStyle[ nRet ];
                rNew = aSearchStyle;
                rNew.RefCount = 1;
                // fill style to id hash
                m_aStyleToId[ aSearchStyle ] = nRet;
            }
        }
    }
    return nRet;
}

OUString StyleContainer::getStyleName( sal_Int32 nStyle ) const
{
    OUStringBuffer aRet( 64 );
    
    std::hash_map< sal_Int32, HashedStyle >::const_iterator style_it =
        m_aIdToStyle.find( nStyle );
    if( style_it != m_aIdToStyle.end() )
    {
        const HashedStyle& rStyle = style_it->second;
        
        PropertyMap::const_iterator name_it = rStyle.Properties.find( USTR("style:name") );
        if( name_it != rStyle.Properties.end() )
            aRet.append( name_it->second );
        else
        {
            PropertyMap::const_iterator fam_it = rStyle.Properties.find( USTR("style:family" ) );
            OUString aStyleName;
            if( fam_it != rStyle.Properties.end() )
            {
                aStyleName = fam_it->second;
            }
            else
                aStyleName = OStringToOUString( rStyle.Name, RTL_TEXTENCODING_ASCII_US );
            sal_Int32 nIndex = aStyleName.lastIndexOf( ':' );
            aRet.append( aStyleName.copy( nIndex+1 ) );
            aRet.append( nStyle );
        }
    }
    else
    {
        aRet.appendAscii( "invalid style id " );
        aRet.append( nStyle );
    }

    return aRet.makeStringAndClear();
}

void StyleContainer::impl_emitStyle( sal_Int32           nStyleId, 
                                     EmitContext&        rContext, 
                                     ElementTreeVisitor& rContainedElemVisitor )
{
    std::hash_map< sal_Int32, HashedStyle >::const_iterator it = m_aIdToStyle.find( nStyleId );
    if( it != m_aIdToStyle.end() )
    {
        const HashedStyle& rStyle = it->second;
            PropertyMap aProps( rStyle.Properties );
        if( !rStyle.IsSubStyle )
            aProps[ USTR( "style:name" ) ] = getStyleName( nStyleId );
        rContext.rEmitter.beginTag( rStyle.Name.getStr(), aProps );

        for( unsigned int n = 0; n < rStyle.SubStyles.size(); ++n )
            impl_emitStyle( rStyle.SubStyles[n], rContext, rContainedElemVisitor );
        if( !rStyle.Contents.isEmpty() )
            rContext.rEmitter.write( rStyle.Contents );
        if( rStyle.ContainedElement )
            rStyle.ContainedElement->visitedBy( rContainedElemVisitor, 
                                                std::list<Element*>::iterator() );
        rContext.rEmitter.endTag( rStyle.Name.getStr() );
    }
}

void StyleContainer::emit( EmitContext&        rContext,
                           ElementTreeVisitor& rContainedElemVisitor )
{
    std::vector< sal_Int32 > aMasterPageSection, aAutomaticStyleSection, aOfficeStyleSection;
    for( std::hash_map< sal_Int32, HashedStyle >::iterator it = m_aIdToStyle.begin();
         it != m_aIdToStyle.end(); ++it )
    {
        if( ! it->second.IsSubStyle )
        {
            if( it->second.Name.equals( "style:master-page" ) )
                aMasterPageSection.push_back( it->first );
            else if( getStyleName( it->first ).equalsAscii( "standard" ) )
                aOfficeStyleSection.push_back( it->first );
            else
                aAutomaticStyleSection.push_back( it->first );
        }
    }
    
    if( ! aMasterPageSection.empty() )
        std::stable_sort( aMasterPageSection.begin(), aMasterPageSection.end(), StyleIdNameSort(&m_aIdToStyle) );
    if( ! aAutomaticStyleSection.empty() )
        std::stable_sort( aAutomaticStyleSection.begin(), aAutomaticStyleSection.end(), StyleIdNameSort(&m_aIdToStyle) );
    if( ! aOfficeStyleSection.empty() )
        std::stable_sort( aOfficeStyleSection.begin(), aOfficeStyleSection.end(), StyleIdNameSort(&m_aIdToStyle) );
    
    int n = 0, nElements = 0;
    rContext.rEmitter.beginTag( "office:styles", PropertyMap() );
    for( n = 0, nElements = aOfficeStyleSection.size(); n < nElements; n++ )
        impl_emitStyle( aOfficeStyleSection[n], rContext, rContainedElemVisitor );
    rContext.rEmitter.endTag( "office:styles" );
    rContext.rEmitter.beginTag( "office:automatic-styles", PropertyMap() );
    for( n = 0, nElements = aAutomaticStyleSection.size(); n < nElements; n++ )
        impl_emitStyle( aAutomaticStyleSection[n], rContext, rContainedElemVisitor );
    rContext.rEmitter.endTag( "office:automatic-styles" );
    rContext.rEmitter.beginTag( "office:master-styles", PropertyMap() );
    for( n = 0, nElements = aMasterPageSection.size(); n < nElements; n++ )
        impl_emitStyle( aMasterPageSection[n], rContext, rContainedElemVisitor );
    rContext.rEmitter.endTag( "office:master-styles" );
}