PdfConverter.java

/**
 * Copyright (C) 2011-2015 The XDocReport Team <xdocreport@googlegroups.com>
 *
 * All rights reserved.
 *
 * Permission is hereby granted, free  of charge, to any person obtaining
 * a  copy  of this  software  and  associated  documentation files  (the
 * "Software"), to  deal in  the Software without  restriction, including
 * without limitation  the rights to  use, copy, modify,  merge, publish,
 * distribute,  sublicense, and/or sell  copies of  the Software,  and to
 * permit persons to whom the Software  is furnished to do so, subject to
 * the following conditions:
 *
 * The  above  copyright  notice  and  this permission  notice  shall  be
 * included in all copies or substantial portions of the Software.
 *
 * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
 * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
 * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package fr.opensagres.odfdom.converter.pdf;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.Writer;

import org.odftoolkit.odfdom.doc.OdfDocument;
import org.odftoolkit.odfdom.dom.OdfContentDom;
import org.odftoolkit.odfdom.dom.OdfStylesDom;
import org.odftoolkit.odfdom.incubator.doc.office.OdfOfficeMasterStyles;
import org.odftoolkit.odfdom.pkg.OdfElement;

import fr.opensagres.odfdom.converter.core.AbstractODFConverter;
import fr.opensagres.odfdom.converter.core.IODFConverter;
import fr.opensagres.odfdom.converter.core.ODFConverterException;
import fr.opensagres.odfdom.converter.pdf.internal.ElementVisitorForIText;
import fr.opensagres.odfdom.converter.pdf.internal.StyleEngineForIText;

public class PdfConverter
    extends AbstractODFConverter<PdfOptions>
{

    private static final IODFConverter<PdfOptions> INSTANCE = new PdfConverter();

    public static IODFConverter<PdfOptions> getInstance()
    {
        return INSTANCE;
    }

    @Override
    protected void doConvert( OdfDocument odfDocument, OutputStream out, Writer writer, PdfOptions options )
        throws ODFConverterException, IOException
    {
        try
        {
            // process styles
            StyleEngineForIText styleEngine = processStyles( odfDocument, options );

            // process content
            ByteArrayOutputStream tempOut = new ByteArrayOutputStream();
            ElementVisitorForIText visitorForIText = processBody( odfDocument, tempOut, styleEngine, options, null );
            Integer expectedPageCount = visitorForIText.getExpectedPageCount();
            int actualPageCount = visitorForIText.getActualPageCount();

            if ( expectedPageCount == null || expectedPageCount == actualPageCount )
            {
                // page count not required or correct, copy temp stream to output stream
                if (styleEngine.getBackgroundImage() != null) {
                	tempOut = styleEngine.getBackgroundImage().insert(tempOut);
                }
                out.write( tempOut.toByteArray() );
                out.close();
            }
            else
            {
                // page count inconsistent, do second visit with forced page count
            	tempOut = new ByteArrayOutputStream();
                processBody( odfDocument, tempOut, styleEngine, options, actualPageCount );
                if (styleEngine.getBackgroundImage() != null) {
                	tempOut = styleEngine.getBackgroundImage().insert(tempOut);
                }
                out.write( tempOut.toByteArray() );
                out.close();
            }

        }
        catch ( Exception e )
        {
            throw new ODFConverterException( e );
        }
    }

	private StyleEngineForIText processStyles( OdfDocument odfDocument, PdfOptions options )
        throws Exception
    {
        StyleEngineForIText styleEngine = new StyleEngineForIText( odfDocument, options );

        OdfStylesDom stylesDom = odfDocument.getStylesDom();
        OdfContentDom contentDom = odfDocument.getContentDom();

        // 1.1) Parse
        // styles.xml//office:document-styles/office:styles
        stylesDom.getOfficeStyles().accept( styleEngine );

        // 1.2) Parse
        // styles.xml//office:document-styles/office:automatic-styles
        stylesDom.getAutomaticStyles().accept( styleEngine );

        // 1.3) Parse
        // content.xml//office:document-content/office:automatic-styles
        contentDom.getAutomaticStyles().accept( styleEngine );

        return styleEngine;
    }

    private ElementVisitorForIText processBody( OdfDocument odfDocument, ByteArrayOutputStream out,
                                                StyleEngineForIText styleEngine, PdfOptions options,
                                                Integer forcedPageCount )
        throws Exception
    {
        ElementVisitorForIText visitorForIText =
            new ElementVisitorForIText( odfDocument, out, styleEngine, options, forcedPageCount );

        OdfOfficeMasterStyles masterStyles = odfDocument.getOfficeMasterStyles();
        OdfElement contentRoot = odfDocument.getContentRoot();

        // 2.1) Parse
        // styles.xml//office:document-styles/office:master-styles
        masterStyles.accept( visitorForIText );

        // 2.2) Parse
        // content.xml//office:body
        contentRoot.accept( visitorForIText );

        visitorForIText.save();

        return visitorForIText;
    }
}