org.gmdev.pdftrick.thread.ImgThumb.java Source code

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Here is the source code for org.gmdev.pdftrick.thread.ImgThumb.java

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/*
 * This file is part of the PdfTrick project.
 * Copyright: (C) 2014
 * Author: Gian Luca Mori
 *
 * 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/>.
 * 
 * For more information, please contact Gian Luca Mori at this
 * address: giansluca@gmail.com
 */
package org.gmdev.pdftrick.thread;

import java.awt.Font;
import java.awt.GridBagLayout;
import java.text.MessageFormat;
import java.util.Properties;

import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

import org.apache.log4j.Logger;
import org.gmdev.pdftrick.engine.ImageListenerShowThumb;
import org.gmdev.pdftrick.factory.PdfTrickFactory;
import org.gmdev.pdftrick.utils.Consts;
import org.gmdev.pdftrick.utils.PdfTrickMessages;

import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.parser.PdfReaderContentParser;

/**
 * @author Gian Luca Mori
 */
public class ImgThumb implements Runnable {

    private static final Logger logger = Logger.getLogger(ImgThumb.class);
    private static final PdfTrickFactory factory = PdfTrickFactory.getFactory();

    private int numberPage;
    volatile boolean finished = false;

    /**
     * Constructor
     * @param numberPage
     */
    public ImgThumb(int numberPage) {
        this.numberPage = numberPage;
    }

    /**
     * Stop thread execution
     */
    public void stop() {
        finished = true;
    }

    @Override
    public void run() {
        execute();
        System.gc();
    }

    /**
     * Render img thumbs contained in a page
     */
    public void execute() {
        final Properties messages = factory.getMessages();
        final JPanel centerPanel = factory.getUserInterface().getCenter().getCenterPanel();

        SwingUtilities.invokeLater(new ManagePanelWait("thumb", "thumb_show"));
        try {
            PdfReader reader = null;
            ImageListenerShowThumb listener = null;

            reader = new PdfReader(factory.getResultFile());
            PdfReaderContentParser parser = new PdfReaderContentParser(reader);
            listener = new ImageListenerShowThumb(numberPage);

            parser.processContent(numberPage, listener);
            reader.close();

            String infoUnsupported = "";
            String infoAvailable = "";

            if (listener.getUnsupportedImage() > 0) {
                infoUnsupported = MessageFormat.format(messages.getProperty("dmsg_02"), numberPage);
            }
            if (listener.getNumImg() == 0) {
                final String noImgTitle = messages.getProperty("jmsg_08");
                SwingUtilities.invokeLater(new Runnable() {
                    @Override
                    public void run() {
                        JLabel noImageLabel = new JLabel(noImgTitle);
                        noImageLabel.setHorizontalAlignment(JLabel.CENTER);
                        noImageLabel.setVerticalAlignment(JLabel.CENTER);
                        noImageLabel.setFont(new Font("Verdana", 1, 20));
                        noImageLabel.setName("NoPicsImg");
                        centerPanel.setLayout(new GridBagLayout());
                        centerPanel.add(noImageLabel);
                        centerPanel.revalidate();
                        centerPanel.repaint();
                    }
                });
                infoAvailable = MessageFormat.format(messages.getProperty("dmsg_03"), numberPage);
            } else {
                String t = listener.getNumImg() > 1 ? messages.getProperty("tmsg_15")
                        : messages.getProperty("tmsg_16");
                infoAvailable = listener.getNumImg() + " " + t;
            }
            PdfTrickMessages.append("INFO", infoUnsupported + infoAvailable);
        } catch (Exception e) {
            logger.error("Exception", e);
            PdfTrickMessages.append("ERROR", Consts.SENDLOG_MSG);
        }
        SwingUtilities.invokeLater(new ManagePanelWait("thumb", "thumb_hide"));
        finished = true;
    }

    /**
     * @return TRUE if the current thread has finished his work
     */
    public boolean isFinished() {
        return finished;
    }

}