ke.co.tawi.babblesms.server.utils.export.PdfUtil.java Source code

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Here is the source code for ke.co.tawi.babblesms.server.utils.export.PdfUtil.java

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/**
 * Copyright 2015 Tawi Commercial Services Ltd
 * 
 * Licensed under the Open Software License, Version 3.0 (the License?); you may
 * not use this file except in compliance with the License. You may obtain a copy
 * of the License at:
 * http://opensource.org/licenses/OSL-3.0
 * 
 * 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.
 */
package ke.co.tawi.babblesms.server.utils.export;

import com.itextpdf.text.Document;
import com.itextpdf.text.Element;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.Phrase;
import com.itextpdf.text.Rectangle;

import com.itextpdf.text.pdf.ColumnText;
import com.itextpdf.text.pdf.PdfPageEventHelper;
import com.itextpdf.text.pdf.PdfWriter;

/**
 * Add a header and a footer to a PDF Report
 * <p>
 * Copyright (c) Tawi Commercial Services Ltd., Mar 21, 2012
 * 
 * @author <a href="mailto:maureenc@tawi.mobi">Maureen Jepchumba</a>
 * 
 */

public class PdfUtil extends PdfPageEventHelper {

    /** Alternating phrase for the header. */
    private Phrase[] header = new Phrase[2];
    /** Current page number (will be reset for every chapter). */
    private int pagenumber;

    /**
     * Initialize one of the headers.
     * @see com.itextpdf.text.pdf.PdfPageEventHelper#onOpenDocument(
     *      com.itextpdf.text.pdf.PdfWriter, com.itextpdf.text.Document)
     */
    @Override
    public void onOpenDocument(PdfWriter writer, Document document) {
        //header[0] = new Phrase("CONFIDENTIAL,  Copyright Tawi Commercial Services Ltd", smallBold);
    }

    /**
     * Initialize one of the headers, based on the chapter title;
     * reset the page number.
     * @see com.itextpdf.text.pdf.PdfPageEventHelper#onChapter(
     *      com.itextpdf.text.pdf.PdfWriter, com.itextpdf.text.Document, float,
     *      com.itextpdf.text.Paragraph)
     */
    @Override
    public void onChapter(PdfWriter writer, Document document, float paragraphPosition, Paragraph title) {
        header[1] = new Phrase(title.getContent());
        pagenumber = 1;
    }

    /**
     * Increase the page number.
     * @see com.itextpdf.text.pdf.PdfPageEventHelper#onStartPage(
     *      com.itextpdf.text.pdf.PdfWriter, com.itextpdf.text.Document)
     */
    @Override
    public void onStartPage(PdfWriter writer, Document document) {
        pagenumber++;
    }

    /**
     * Adds the header and the footer.
     * @see com.itextpdf.text.pdf.PdfPageEventHelper#onEndPage(
     *      com.itextpdf.text.pdf.PdfWriter, com.itextpdf.text.Document)
     */
    @Override
    public void onEndPage(PdfWriter writer, Document document) {
        Rectangle rect = writer.getBoxSize("art");
        switch (writer.getPageNumber() % 1) {

        case 0:
            ColumnText.showTextAligned(writer.getDirectContent(), Element.ALIGN_RIGHT, header[0], rect.getRight(),
                    rect.getTop(), 0);
            break;
        case 1:
            ColumnText.showTextAligned(writer.getDirectContent(), Element.ALIGN_LEFT, header[1], rect.getLeft(),
                    rect.getTop(), 0);
            break;
        }
        ColumnText.showTextAligned(writer.getDirectContent(), Element.ALIGN_CENTER,
                new Phrase(String.format("page %d", pagenumber)), (rect.getLeft() + rect.getRight()) / 2,
                rect.getBottom() - 18, 0);
    }

}