kformula/svg/svgexport.cpp

/* This file is part of the KDE project
   Copyright (C) 2005 Inge Wallin <inge@lysator.liu.se>
   Copyright (C) 2005 Fredrik Edemar <f_edemar@linux.se>
 
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
 
   This library 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
   Library General Public License for more details.
 
   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA  02110-1301  USA.
*/
 
#include <tqpicture.h>
#include <tqpainter.h>
 
#include <tdeapplication.h>
#include <tdemessagebox.h>
 
#include <KoFilterChain.h>
#include <KoStore.h>
//#include <KoStoreDevice.h>
#include <kgenericfactory.h>
 
#include <kformulacontainer.h>
#include "kformuladocument.h"
 
#include "svgexport.h"
 
 
typedef KGenericFactory<SvgExport, KoFilter> SvgExportFactory;
K_EXPORT_COMPONENT_FACTORY( libkfosvgexport, SvgExportFactory( "svgexport" ) )
 
SvgExport::SvgExport(KoFilter *, const char *, const TQStringList&) 
    : KoFilter()
{
}
 
SvgExport::~SvgExport()
{
}
 
 
KoFilter::ConversionStatus
SvgExport::convert(const TQCString& from, const TQCString& to)
{
    // Check for proper conversion.
    if ( from != "application/x-kformula" || to != "image/svg+xml" )
        return KoFilter::NotImplemented;
 
    // Read the contents of the KFormula file
    KoStoreDevice* storeIn = m_chain->storageFile( "root", KoStore::Read );
    if ( !storeIn ) {
    KMessageBox::error( 0, i18n("Failed to read data." ), 
                i18n( "SVG Export Error" ) );
    return KoFilter::FileNotFound;
    }
 
    // Get the XML tree.
    TQDomDocument  domIn;
    domIn.setContent( storeIn );
    TQDomElement   docNode = domIn.documentElement();
 
    // Read the document from the XML tree.
    KFormula::DocumentWrapper* wrapper = new KFormula::DocumentWrapper( kapp->config(), 0 );
    KFormula::Document* kformulaDoc = new KFormula::Document;
    wrapper->document( kformulaDoc );
    KFormula::Container* formula = kformulaDoc->createFormula();
 
    if ( !kformulaDoc->loadXML( domIn ) ) {
        KMessageBox::error( 0, i18n( "Malformed XML data." ), 
                i18n( "SVG Export Error" ) );
        return KoFilter::WrongFormat;
    }
 
    // Draw the actual bitmap.
    TQPicture  picture;
    TQPainter  painter(&picture);
    TQRect     rect(TQPoint(0, 0), TQPoint(500, 400));
    formula->draw( painter, rect, false );
    painter.end();
 
    // Save the image.
    if ( !picture.save( m_chain->outputFile(), "SVG" ) ) {
        KMessageBox::error( 0, i18n( "Failed to write file." ), 
                i18n( "SVG Export Error" ) );
    }
 
    delete formula;
    delete wrapper;
    return KoFilter::OK;
}
 
 
#include <svgexport.moc>