ConsoleShell.java

/**
 * Licensed under the GNU LESSER GENERAL PUBLIC LICENSE, Version 3, 29 June 2007;
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.gnu.org/licenses/lgpl-3.0.txt
 *
 * 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 org.kevoree.platform.standalone.gui;

import com.explodingpixels.macwidgets.IAppWidgetFactory;

import javax.swing.*;
import java.awt.*;
import java.io.*;

public class ConsoleShell extends JPanel {

    private static ConsoleShell singleton = null;
    public static PrintStream STDwriter = null;
    public static PrintStream ERRwriter = null;
    private JScrollPane scrollShell = null;

    public ConsoleShell() {

        final PipedOutputStream pouts = new PipedOutputStream();
        try {
            PipedInputStream pins = new PipedInputStream(pouts);
            System.setIn(pins);
        } catch (IOException e) {
            e.printStackTrace();
        }
        this.setBackground(new Color(57, 57, 57));
        setLayout(new BorderLayout());
        final RichTextArea textArea = new RichTextArea();
        textArea.setBackground(new Color(57, 57, 57));
        textArea.setEditable(false);
        textArea.setPreferredSize(new Dimension(500, 300));

        singleton = null;
        STDwriter = new PrintStream(new TextOutputStream(textArea, Color.WHITE));
        ERRwriter = new PrintStream(new TextOutputStream(textArea, Color.ORANGE));

        scrollShell = new JScrollPane(textArea);
        IAppWidgetFactory.makeIAppScrollPane(scrollShell);
        add(scrollShell, BorderLayout.CENTER);
        backup();
        System.setOut(STDwriter);
        System.setErr(ERRwriter);
    }

    private PrintStream oldOut;
    private PrintStream oldErr;

    public void backup() {
        oldOut = System.out;
        oldErr = System.err;
    }

    public void restore() {
        System.setErr(oldErr);
        System.setOut(oldOut);
    }

    private class TextOutputStream extends OutputStream {
        private RichTextArea _textArea = null;
        private Color _color = null;

        public TextOutputStream(final RichTextArea textArea, final Color color) {
            _textArea = textArea;
            _color = color;
        }

        StringBuilder currentLine = new StringBuilder();

        @Override
        public void write(final int i) throws IOException {

            SwingUtilities.invokeLater(new Runnable() {
                public void run() {
                    currentLine.append((char) i);
                    if (((char) i) == '\n') {
                        _textArea.append(currentLine.toString(), _color, Color.white, false);
                        currentLine = new StringBuilder();
                    }
                }
            });
        }
    }

}