digilib.pdf.PDFTitlePage.java Source code

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Here is the source code for digilib.pdf.PDFTitlePage.java

Source

package digilib.pdf;

/*
 * #%L
 * A class for the generation of title pages for the generated pdf documents.
 * %%
 * Copyright (C) 2009 - 2013 MPIWG Berlin
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as 
 * published by the Free Software Foundation, either version 3 of the 
 * License, or (at your option) any later version.
 * 
 * This program 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 General Lesser Public License for more details.
 * 
 * You should have received a copy of the GNU General Lesser Public 
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/lgpl-3.0.html>.
 * #L%
 * Authors: Christopher Mielack,
 *          Robert Casties (robcast@berlios.de)
 */

import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;

import org.apache.log4j.Logger;

import com.itextpdf.text.Anchor;
import com.itextpdf.text.BadElementException;
import com.itextpdf.text.Chunk;
import com.itextpdf.text.Element;
import com.itextpdf.text.FontFactory;
import com.itextpdf.text.Image;
import com.itextpdf.text.Paragraph;

import digilib.conf.PDFRequest;
import digilib.io.FileOpException;
import digilib.servlet.PDFCache;

/** A class for the generation of title pages for the generated pdf documents.
 * 
 * 
 */
public class PDFTitlePage {

    private PDFRequest job_info = null;
    private DigilibInfoReader info_reader = null;
    protected static Logger logger = Logger.getLogger("digilib.servlet");

    /**
     * Initialize a TitlePage
     * @param pdfji
     */
    public PDFTitlePage(PDFRequest pdfji) {
        job_info = pdfji;

        // use MPIWG-style info.xml
        info_reader = getInfoXmlReader(pdfji);
    }

    /**
     * @param pdfji
     * @return 
     */
    protected DigilibInfoReader getInfoXmlReader(PDFRequest pdfji) {
        try {
            // try to load ../presentation/info.xml
            File imgDir = pdfji.getImageJobInformation().getFileDirectory().getDir();
            File docDir = imgDir.getParentFile();
            File infoFn = new File(new File(docDir, "presentation"), "info.xml");
            return new DigilibInfoReader(infoFn.getAbsolutePath());
        } catch (FileOpException e) {
            logger.warn("info.xml not found");
        }
        return null;
    }

    /**
     * generate iText-PDF-Contents for the title page
     * 
     * @return
     */
    public Element getPageContents() {
        Paragraph content = new Paragraph();
        content.setAlignment(Element.ALIGN_CENTER);

        // add vertical whitespace
        for (int i = 0; i < 8; i++) {
            content.add(Chunk.NEWLINE);
        }

        // add logo
        content.add(getLogo());
        content.add(Chunk.NEWLINE);
        content.add(Chunk.NEWLINE);

        // add title
        Anchor title = new Anchor(new Paragraph(getTitle(), FontFactory.getFont(FontFactory.HELVETICA, 16)));
        String burl = job_info.getImageJobInformation().getAsString("base.url");

        title.setReference(burl + "digilib.jsp?fn=" + job_info.getImageJobInformation().getAsString("fn"));
        content.add(title);
        content.add(Chunk.NEWLINE);

        // add author
        if (getDate() != " ")
            content.add(new Paragraph(getAuthor() + " (" + getDate() + ")",
                    FontFactory.getFont(FontFactory.HELVETICA, 14)));
        else
            content.add(new Paragraph(getAuthor(), FontFactory.getFont(FontFactory.HELVETICA, 14)));

        content.add(Chunk.NEWLINE);

        // add page numbers
        content.add(new Paragraph(getPages(), FontFactory.getFont(FontFactory.HELVETICA, 12)));

        content.add(Chunk.NEWLINE);
        content.add(Chunk.NEWLINE);
        content.add(Chunk.NEWLINE);

        // add digilib version
        content.add(new Paragraph(getDigilibVersion(), FontFactory.getFont(FontFactory.HELVETICA, 10)));

        for (int i = 0; i < 8; i++) {
            content.add(Chunk.NEWLINE);
        }
        Anchor address = new Anchor(
                new Paragraph(burl + "digilib.jsp?fn=" + job_info.getImageJobInformation().getAsString("fn"),
                        FontFactory.getFont(FontFactory.COURIER, 9)));
        address.setReference(burl + "digilib.jsp?fn=" + job_info.getImageJobInformation().getAsString("fn"));

        content.add(address);

        return content;
    }

    /*
     * Methods for the different attributes.
     * 
     */

    private Image getLogo() {
        try {
            URL url = new URL(job_info.getDlConfig().getAsString("pdf-logo"));
            if (url != null && !url.equals("")) {
                Image logo = Image.getInstance(url);
                logo.setAlignment(Element.ALIGN_CENTER);
                return logo;
            }
        } catch (BadElementException e) {
            logger.error(e.getMessage());
        } catch (MalformedURLException e) {
            logger.error(e.getMessage());
        } catch (IOException e) {
            logger.error(e.getMessage());
        }
        return null;
    }

    private String getTitle() {
        if (info_reader.hasInfo())
            return info_reader.getAsString("title");
        else
            return job_info.getImageJobInformation().getAsString("fn");
    }

    private String getAuthor() {
        if (info_reader.hasInfo())
            return info_reader.getAsString("author");
        else
            return " ";
    }

    private String getDate() {
        if (info_reader.hasInfo())
            return info_reader.getAsString("date");
        else
            return " ";
    }

    private String getPages() {
        return "Pages " + job_info.getAsString("pgs") + " (scan page numbers)";
    }

    private String getDigilibVersion() {
        return "Digilib PDFMaker v." + PDFCache.version;
    }

}