com.lowagie.rups.io.TextAreaOutputStream Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of pdf-swing Show documentation
There is a newer version: 2.2.2
/*
 * $Id: TextAreaOutputStream.java 3117 2008-01-31 05:53:22Z xlv $
 *
 * Copyright 2007 Bruno Lowagie.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

package com.lowagie.rups.io;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.OutputStream;
import javax.swing.JTextArea;

/**
 * Everything writing to this OutputStream will be shown in a JTextArea.
 */
public class TextAreaOutputStream extends OutputStream {

    /**
     * The text area to which we want to write.
     */
    protected JTextArea text;
    /**
     * Keeps track of the offset of the text in the text area.
     */
    protected int offset;

    /**
     * Constructs a TextAreaOutputStream.
     *
     * @param text the text area to which we want to write.
     */
    public TextAreaOutputStream(JTextArea text) {
        this.text = text;
        clear();
    }

    /**
     * Clear the text area.
     */
    public void clear() {
        text.setText(null);
        offset = 0;
    }

    /**
     * @see java.io.OutputStream#write(int)
     */
    @Override
    public void write(int i) throws IOException {
        byte[] b = {(byte) i};
        write(b, 0, 1);
    }

    /**
     * @see java.io.OutputStream#write(byte[], int, int)
     */
    @Override
    public void write(byte[] b, int off, int len) {
        String snippet = new String(b, off, len);
        text.insert(snippet, offset);
        offset += len - off;
    }

    /**
     * @see java.io.OutputStream#write(byte[])
     */
    @Override
    public void write(byte[] b) throws IOException {
        ByteArrayInputStream bais = new ByteArrayInputStream(b);
        byte[] snippet = new byte[1024];
        int bytesread;
        while ((bytesread = bais.read(snippet)) > 0) {
            write(snippet, 0, bytesread);
        }
    }

}