package jas2.swingstudio;

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

/**
 * An OutputStream implementation that places it's
 * output in a swing text model (Document).  The 
 * Document can be either a plain text or styled
 * document implementation.  If styled, the attributes
 * assigned to the output stream will be used in
 * the display of the output.
 * 
 * @author Peter Armstrong
 *
 * Heavily based on (i.e. a modified subset of):
 * http://java.sun.com/products/jfc/tsc/text/console/DocumentOutputStream.java
 * @author  Timothy Prinzing
 * @version 1.1 02/05/99
 */
public class JASConsoleDocumentOutputStream extends OutputStream {
	public JASConsoleDocumentOutputStream(Document doc, AttributeSet a,
										  String s, JASConsoleTabbedPane j) {
        theDocument = doc;
        theAttributeSet = a;
		theScrollPaneName = s;
		theTabbedPane = j;
    }
    public void write(int b) throws IOException {
        one[0] = (byte) b;
        write(one, 0, 1);
    }
    public void write(byte b[], int off, int len) throws IOException {
        try {
			int theTabIndex = theTabbedPane.indexOfTab(theScrollPaneName);
			//I still have to use the tab index to check if the tab
			//with a given name is in theTabbedPane--the difference is now
			//I look up the index instead of stupidly storing it!
			if (theTabIndex != -1) {
				theTabbedPane.setSelectedIndex(theTabIndex);
			} else {
				//make a new JASConsoleScrollPane
				JASConsoleScrollPane theScrollPane =
					theTabbedPane.getSelectedConsoleScrollPane();

				//now make a new scroll pane, add it to the tabbed pane and set selected
				//when the tab is added theTabbedPane's listener takes care of the
				//commandProcessor stuff for us
				JASConsoleScrollPane theNewScrollPane =
					new JASConsoleScrollPane(theScrollPaneName, theTabbedPane);
				theTabbedPane.addTab(theScrollPaneName,theNewScrollPane);
				theTabIndex = theTabbedPane.indexOfTab(theScrollPaneName);
				theTabbedPane.setSelectedIndex(theTabIndex);
				
				//the JASConsoleScrollPane constructor inits the JASConsoleTextPane
				//so now I can set the Document!
				theNewScrollPane.getTheTextArea().setDocument(theDocument);
				theNewScrollPane.setOutputAttributes(theAttributeSet);
			}
			//now that we're here, the correct scroll pane exist and be focused
			//so write the string
			String s = new String(b,off,len);
            theDocument.insertString(theDocument.getLength(), s, theAttributeSet);
			//and optionally append it to the log file also
			appendToLog(s);
			//and make sure that our Document hasn't gotten too big
			JASConsoleDocumentUtilities.trimDoc(theDocument);
			theTabbedPane.getSelectedConsoleScrollPane().scrollToEnd();
        } catch (BadLocationException ble) {
            throw new IOException(ble.getMessage());
		}
    }
	private void appendToLog(String s) {
		JASConsoleScrollPane theScrollPane = theTabbedPane.getSelectedConsoleScrollPane();
		if (theScrollPane != null && ((JASConsoleTextArea)theScrollPane.getTheTextArea()).isLoggingOn()) {
			try {
				((JASConsoleTextArea)theScrollPane.getTheTextArea()).getLogWriter().write(s);
				((JASConsoleTextArea)theScrollPane.getTheTextArea()).getLogWriter().flush();
			} catch (IOException eek) {
			}
		}
	}
	private String theScrollPaneName;
    private byte[] one = new byte[1];
    private Document theDocument;
    private AttributeSet theAttributeSet;
	private JASConsoleTabbedPane theTabbedPane;
}