package jmslexamples;

import java.awt.TextArea;
import java.io.*;
import java.net.URL;

import com.softsynth.jmsl.*;
import com.softsynth.jmsl.score.Score;
import com.softsynth.jmsl.score.ScoreFrame;
import com.softsynth.jmsl.score.util.RawJScoreFileImporter;
import com.softsynth.jmsl.score.util.RawJScoreFileParser;

/**
 * Read a URL that points to a raw JScore input text file. Print it to a
 * TextArea, parse it, and open the score in a ScoreFrame
 * 
 * @author Nick Didkovsky, (c) 2000 Nick Didkovsky, all rights reserved
 */
public class RawJScoreImportDemo extends java.applet.Applet {

    ScoreFrame scoreFrame;
    TextArea textArea;

    public void init() {
    }

    public void start() {
        synchronized (JMSL.class) {
            try {
                JMSL.setIsApplet(true);
                JMSL.clock = new DefaultMusicClock();
                JMSL.clock.setAdvance(0.1);
                JMSL.scheduler = new EventScheduler();
                JMSL.scheduler.start();
                String urlName = getParameter("URL");
                System.out.println(urlName);
                URL url = new URL(getCodeBase(), urlName);
                System.out.println(url + "");

                add(textArea = new TextArea(40, 40));
                readScoreToTextArea(url);

                // parse the textfile and build a score
                RawJScoreFileParser parser = new RawJScoreFileParser(url);
                RawJScoreFileImporter importer = new RawJScoreFileImporter();
                parser.addRawJScoreFileListener(importer);
                parser.parse();
                parser.close();

                // display it
                scoreFrame = new ScoreFrame();
                scoreFrame.addScore(importer.getScore(800, 600));
                scoreFrame.setSize(850, 600);
                scoreFrame.setVisible(true);

            } catch (Exception e) {
                System.out.println("ERR: " + e);
            }
        }
    }

    public void stop() {
        synchronized (JMSL.class) {
            removeAll();
            if (scoreFrame != null) {
                scoreFrame.setVisible(false);
                scoreFrame.dispose();
                Score.deleteCanvas();
            }
            JMSL.scheduler.stop();
            JMSL.closeMusicDevices();
        }
    }

    /** textarea.append() left deprecated to work in all browsers */
    void readScoreToTextArea(URL url) throws IOException {
        BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
        textArea.setText("");
        String line = in.readLine();
        while (line != null) {
            textArea.appendText(line + "\n");
            line = in.readLine();
        }
        in.close();
    }

}