org.unitime.timetable.util.PdfEventHandler.java Source code

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Here is the source code for org.unitime.timetable.util.PdfEventHandler.java

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/*
 * UniTime 3.2 - 3.5 (University Timetabling Application)
 * Copyright (C) 2008 - 2013, UniTime LLC, and individual contributors
 * as indicated by the @authors tag.
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU 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 Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along
 * with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
*/
package org.unitime.timetable.util;

import java.io.IOException;
import java.io.OutputStream;
import java.util.Date;

import org.unitime.localization.impl.Localization;
import org.unitime.timetable.gwt.resources.GwtMessages;

import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Font;
import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfPageEventHelper;
import com.lowagie.text.pdf.PdfWriter;

/**
 * @author Tomas Muller
 */
public class PdfEventHandler extends PdfPageEventHelper {
    private static final GwtMessages MESSAGES = Localization.create(GwtMessages.class);

    private BaseFont baseFont;
    private float fontSize;

    private Date dateTime = null;
    private Formats.Format<Date> dateFormat = Formats.getDateFormat(Formats.Pattern.DATE_TIME_STAMP);

    /**
     * Constructor for PdfEventHandler
     * 
     */
    public PdfEventHandler() throws DocumentException, IOException {

        super();

        Font font = PdfFont.getSmallFont();
        setBaseFont(font.getBaseFont());
        setFontSize(font.getSize());

        return;
    }

    /**
     * Initialize Pdf footer
     * @param document
     * @param outputStream
     * @return PdfWriter
     */
    public static PdfWriter initFooter(Document document, OutputStream outputStream)
            throws DocumentException, IOException {

        PdfWriter iWriter = PdfWriter.getInstance(document, outputStream);
        iWriter.setPageEvent(new PdfEventHandler());

        return iWriter;
    }

    /**
     * Print footer string on each page
     * @param writer
     * @param document
     */
    public void onEndPage(PdfWriter writer, Document document) {

        if (getDateTime() == null) {
            setDateTime(new Date());
        }

        PdfContentByte cb = writer.getDirectContent();
        cb.beginText();
        cb.setFontAndSize(getBaseFont(), getFontSize());
        cb.showTextAligned(PdfContentByte.ALIGN_LEFT, getDateFormat().format(getDateTime()), document.left(), 20,
                0);
        cb.showTextAligned(PdfContentByte.ALIGN_RIGHT, String.valueOf(document.getPageNumber()), document.right(),
                20, 0);
        cb.showTextAligned(PdfContentByte.ALIGN_CENTER, MESSAGES.pdfCopyright(Constants.getVersion()),
                (document.left() + document.right()) / 2, 20, 0);
        cb.endText();

        return;
    }

    private BaseFont getBaseFont() {
        return baseFont;
    }

    private void setBaseFont(BaseFont baseFont) {
        this.baseFont = baseFont;
    }

    private float getFontSize() {
        return fontSize;
    }

    private void setFontSize(float fontSize) {
        this.fontSize = fontSize;
    }

    private Date getDateTime() {
        return dateTime;
    }

    private void setDateTime(Date dateTime) {
        this.dateTime = dateTime;
    }

    private Formats.Format<Date> getDateFormat() {
        return dateFormat;
    }

}