net.scs.reader.virtualprinter.PdfPrinter.java Source code

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Here is the source code for net.scs.reader.virtualprinter.PdfPrinter.java

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/*
 * SCS Reader
 * Copyright (C) 2010  Martin W. Kirst
 *                     (master_jaf at users dot sourceforge dot net)
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero 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 Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package net.scs.reader.virtualprinter;

import com.lowagie.text.Chunk;
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Font;
import com.lowagie.text.Paragraph;

public class PdfPrinter extends AbstractPrinter {

    private static final char SP = '\u0020';
    private static final char NBSP = '\u00a0';

    private final Document pdfdoc;
    private final Font font;
    private final Font fontbold;
    private final float leading;

    private int currentPage = 1;

    /**
     * @param pdfdoc
     * @param font
     * @param fontbold
     * @param leading
     */
    public PdfPrinter(Document pdfdoc, Font font, Font fontbold, float leading) {
        this(PrinterConfig.getDefault(), pdfdoc, font, fontbold, leading);
    }

    /**
     * @param printerConfig
     * @param pdfdoc
     * @param font
     * @param fontbold
     * @param leading
     */
    public PdfPrinter(PrinterConfig printerConfig, Document pdfdoc, Font font, Font fontbold, float leading) {
        super(printerConfig);
        this.pdfdoc = pdfdoc;
        this.font = font;
        this.fontbold = fontbold;
        this.leading = leading;
    }

    /* (non-Javadoc)
     * @see com.ibm.scs.virtualprinter.TextPrinter#formFeed()
     */
    @Override
    public void formFeed() {
        printCurrentPage();

        // do the normal stuff
        super.formFeed();
    }

    private void printCurrentPage() {
        // first create a new page
        pdfdoc.newPage();
        pdfdoc.setPageCount(currentPage++);

        boolean emptypage = true;
        // second write the content
        for (VirtualLine currentLine : getLinesOnCurrentPage()) {
            emptypage = false;
            Paragraph p = new Paragraph();
            p.setSpacingAfter(0.0f);
            p.setSpacingBefore(0.0f);
            p.setExtraParagraphSpace(0.0f);
            p.setLeading(leading);
            currentLine.position(0);
            StringBuilder sb = new StringBuilder();
            boolean isbold = false;
            if (!currentLine.hasNext()) {
                // empty lines need at least one character
                sb.append(printerConfig.NL);
            }
            while (currentLine.hasNext()) {
                final EnhancedCharacter echar = currentLine.next();
                // Workaround, replace 'normal spaces' with 'non-breaking-spaces'
                // <a href="http://sourceforge.net/tracker/?func=detail&aid=2866002&group_id=15255&atid=315255">
                //     Multiline paragraph, leading spaces are ignored problem - ID: 2866002
                // </a>
                char c = (echar.getChar() == SP) ? NBSP : echar.getChar();
                if (isbold == echar.isBold()) {
                    sb.append(c);
                } else {
                    p.add(new Chunk(sb.toString(), (isbold) ? fontbold : font));
                    sb = new StringBuilder();
                    sb.append(c);
                    isbold = !isbold; // flip it
                }
            }
            p.add(new Chunk(sb.toString(), (isbold) ? fontbold : font));
            try {
                pdfdoc.add(p);
            } catch (DocumentException e) {
                // transform into RuntimeException
                throw new RuntimeException(e);
            }
        }
        if (emptypage) {
            try {
                pdfdoc.add(new Paragraph(Character.toString(NBSP)));
            } catch (DocumentException e) {
                // transform into RuntimeException
                throw new RuntimeException(e);
            }
        }
    }

    @Override
    public void finish() {
        final VirtualLine[] linesOnCurrentPage = getLinesOnCurrentPage();
        // ignore empty last page
        if (!(linesOnCurrentPage.length == 1 && linesOnCurrentPage[0].hasNext() == false)) {
            printCurrentPage();
        }
    }

}