/*
 * Copyright (c) 1995-1997 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Permission to use, copy, modify, and distribute this software
 * and its documentation for NON-COMMERCIAL purposes and without
 * fee is hereby granted provided that this copyright notice
 * appears in all copies. Please refer to the file "copyright.html"
 * for further important copyright and licensing information.
 *
 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
 * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
 * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
 */
/*
 * @(#)TextBoundDemo.java	1.1 96/11/23
 *
 * (C) Copyright Taligent, Inc. 1996 - All Rights Reserved
 * (C) Copyright IBM Corp. 1996 - All Rights Reserved
 *
 * Portions copyright (c) 1996 Sun Microsystems, Inc. All Rights Reserved.
 *
 *   The original version of this source code and documentation is copyrighted
 * and owned by Taligent, Inc., a wholly-owned subsidiary of IBM. These
 * materials are provided under terms of a License Agreement between Taligent
 * and Sun. This technology is protected by multiple US and International
 * patents. This notice and attribution to Taligent may not be removed.
 *   Taligent is a registered trademark of Taligent, Inc.
 *
 * Permission to use, copy, modify, and distribute this software
 * and its documentation for NON-COMMERCIAL purposes and without
 * fee is hereby granted provided that this copyright notice
 * appears in all copies. Please refer to the file "copyright.html"
 * for further important copyright and licensing information.
 *
 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
 * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
 * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
 *
 */

import java.applet.Applet;
import java.awt.*;
import java.util.*;

import java.text.BreakIterator;

public class TextBoundDemo extends DemoApplet
{
    public static void main(String argv[]) {
        DemoApplet.showDemo(new TextBoundFrame(null));
    }

    public Frame createDemoFrame(DemoApplet applet) {
        return new TextBoundFrame(applet);
    }
}



class TextBoundFrame extends Frame
{
	private static final String creditString =
		"v1.1a9, Demo";

	private static final int FIELD_COLUMNS = 45;
    private static final Font choiceFont = null;
    private static final boolean DEBUG = false;
    private DemoApplet applet;

    final String right = "-->";
    final String left = "<--";

	private BreakIterator enum;

    TextArea text;
    Choice bound;

    public TextBoundFrame(DemoApplet applet)
    {
        this.applet = applet;
        init();
        start();
    }



    public void run()
    {
    	/*
		while (true) {
			try {
				checkChange();
				Thread.sleep(250);
			}
			catch (InterruptedException e) {
			}
			catch (Exception e) {
			}
			catch (Throwable e) {
			}
		}
		*/
    }

	int s, e;
	int ts, te;

    public void checkChange()
    {
//        System.out.println("checkChange...");
    	if ((text.getSelectionStart() & 0x7FFF) != ts ||
    		(text.getSelectionEnd() & 0x7FFF) != te) {

    		int tempS = text.getSelectionStart() & 0x7FFF;
    		int tempE = text.getSelectionEnd() & 0x7FFF;

//			System.out.println(">");
//			select(0, 0);
//			select(tempS, tempE);
    		select(tempS - (ts - s), tempE - (te - e));
//			System.out.println("<");


//   		if (s != ts || e != te) System.out.println("     s("+s+") ts("+ts+") e("+e+") te("+te+")");
//   		if (tempS != ts || tempE != te) System.out.println(">s("+s+") tempS("+tempS+") e("+e+") tempE("+tempE+")");
//			select(s - (ts - s), e - (te - e));
//    		if (tempS != ts || tempE != te) System.out.println("s("+s+") tempS("+tempS+") e("+e+") tempE("+tempE+")");

//			System.out.println("lkdslksj");
    	}
    }

	public void select(int sIn, int eIn)
	{
		s = sIn;
		e = eIn;
		text.select(s, e);
    	ts = text.getSelectionStart() & 0x7FFF;
    	te = text.getSelectionEnd() & 0x7FFF;
    	// System.out.println("   "+(ts-s)+","+(te-e));
		// System.out.println(">>select");
   		// if (s != ts || e != te) System.out.println(">s("+s+") ts("+ts+") e("+e+") te("+te+")");
//  		if (s != ts || e != te) System.out.println(">>s("+s+") ts("+ts+") e("+e+") te("+te+")");
	}

    public int getSelectionStart()
    {
		checkChange();
		return s;
//    	return text.getSelectionStart() & 0x7FFF;
    }


    public int getSelectionEnd()
    {
		checkChange();
    	return e;
//    	return text.getSelectionEnd() & 0x7FFF;
    }

	public final synchronized void selectRange(int s, int e)
	{
		try {
			//if (getSelectionStart() != s || getSelectionEnd() != e) {
	    		//text.select(s, e);
	    		select(s,e);
			//}
//			if (getSelectionStart() != s || getSelectionEnd() != e) {
//				System.out.println("AGH! select("+s+","+e+") -> ("+
//				getSelectionStart()+","+getSelectionEnd()+")");
//				text.select(s - (getSelectionStart() - s), e - (getSelectionEnd() - e));
//			}
		} catch (Exception exp) {
			errorText(exp.toString());
		}
	}



    public void init()
    {
        buildGUI();
    }


    public void start()
    {
    }


	void addWithFont(Container container, Component foo, Font font) {
		if (font != null)
			foo.setFont(font);
		container.add(foo);
	}



   public void buildGUI()
    {
        setBackground(Utility.bgColor);
		setLayout(new BorderLayout());

       Panel topPanel = new Panel();

			Label titleLabel =
				new Label("Text Boundary Demo", Label.CENTER);
	        titleLabel.setFont(Utility.titleFont);
	        topPanel.add(titleLabel);

	        Label demo=new Label(creditString, Label.CENTER);
	        demo.setFont(Utility.creditFont);
	        topPanel.add(demo);

			Panel choicePanel = new Panel();

	        Label demo1=new Label("Boundaries", Label.LEFT);
	        demo1.setFont(Utility.labelFont);
	        choicePanel.add(demo1);

	        bound = new Choice();
                bound.setBackground(Utility.choiceColor);
	        bound.addItem("Sentence");
	        bound.addItem("Line Break");
	        bound.addItem("Word");
	        bound.addItem("Char");
	        if (choiceFont != null)
	        	bound.setFont(choiceFont);

	        choicePanel.add(bound);
	        topPanel.add(choicePanel);

	        Utility.fixGrid(topPanel,1);


	    add("North", topPanel);


        	int ROWS = 15;
     		int COLUMNS = 50;
	        text = new TextArea(getInitialText(), ROWS, COLUMNS);
	        text.setEditable(true);
	        text.selectAll();
	        text.setFont(Utility.editFont);
        add("Center", text);

		Panel copyrightPanel = new Panel();
        addWithFont (copyrightPanel,
        	new Label(Utility.copyright1, Label.LEFT),Utility.creditFont);
        addWithFont (copyrightPanel,
	       	new Label(Utility.copyright2, Label.LEFT),Utility.creditFont);
        Utility.fixGrid(copyrightPanel,1);
        add("South", copyrightPanel);

		//layout();
        handleEnumChanged();

        // (new Thread(this)).start();
    }



    public String getInitialText()
    {
    	return
	/*
			"\"This is a sentence.\" This is not.\" \"because. And go. " +
			"This is a simple 012.566,5 sample sentence. \n"+
			"It does not have to make any sense as you can see. \n"+
			"Nel mezzo del cammin di nostra vita, mi ritrovai in "+
				"una selva oscura. \n"+
			"Che la dritta via aveo smarrita. \n"+
			"He said, that I said, that you said!! \n"+
			"Don't rock the boat.\n\n"+
			"Because I am the daddy, that is why. \n"+
			"Not on my time (el timo.)! \n"+
			"Tab\tTab\rTab\tWow."+
			"So what!!\n\n"+
			"Is this a question???  " +
			"I wonder...Hmm.\n" +
			"Harris thumbed down several, including \"Away We Go\" "+
				"(which became the huge success Oklahoma!). \n"+
			"One species, B. anthracis, is highly virulent.\n"+
			"Wolf said about Sounder: \"Beautifully thought-out and "+
				"directed.\"\n"+
			"Have you ever said, \"This is where I shall live\"? \n"+
			"He 1000,233,456.000 answered, \"You may not!\" \n"+
			"Another popular saying is: \"How do you do?\". \n"+
			"What is the proper use of the abbreviation pp.? \n"+
			"Yes, I am 1,23.322% definatelly 12\" tall!!";
	*/
			"(\"This is a complete sentence.\") This is (\"not.\") also. \n"
			+"An abbreviation in the middle, etc. and one at the end, etc. "+
				"This\n"
			+"is a simple sample 012.566,5 sentence. It doesn't\n"
			+"have to make any sense, as you can see. Nel mezzo del \nc"
			+"ammin di nostra vita, mi ritrovai in una selva oscura. Che\n"
			+"la dritta via aveo smarrita. Not on my time (el timo.)! And\n"
			+"tabulated columns: \tCol1\tCol2\t3,456%.\t\n"
			+"Is this a question???  I wonder... Hmm. Harris thumbed\n"
			+"down several, including \"Away We Go\" (which became the \n"
			+"huge success Oklahoma!). One species, B. anthracis, is \n"
			+"highly virulent. Wolf said about Sounder: \"Beautifully \n"
			+"thought-out and directed.\" Have you ever said, \"This is "+
				"where I\n"
			+"shall live\"? He said 1000,233,456.000 and answered, \"You "+
				"may not!\" \n"
			+"Another popular saying is: \"How do you do?\". What is the \n"
			+"proper use of the abbreviation pp.? Yes, I am 12\' 3\" tall!!";
    }


	public void handleEnumChanged()
	{
    	String s = bound.getSelectedItem();
    	if (s.equals("Char")) {
			errorText("getCharacterInstance");
    		enum = BreakIterator.getCharacterInstance();
    	}
    	else if (s.equals("Word")) {
			errorText("tWordBreak");
    		enum = BreakIterator.getWordInstance();
    	}
    	else if (s.equals("Line Break")) {
			errorText("getLineInstance");
    		enum = BreakIterator.getLineInstance();
    	}
    	else /* if (s.equals("Sentence")) */ {
			errorText("getSentenceInstance");
    		enum = BreakIterator.getSentenceInstance();
    	}
    	enum.setText(text.getText());
		selectRange(0, 0);
    	//text.select(0,0);
	}

	public void handleForward()
	{
		try {
			enum.setText(text.getText());
			int oldStart = getSelectionStart();
			int oldEnd = getSelectionEnd();
			if (oldEnd < 1) {
				selectRange(0, enum.following(0));
			}
			else {
				int s = enum.following(oldEnd-1);
				int e = enum.next();
				if (e == -1) {
					e = s;
				}
				selectRange(s, e);
			}
			//text.select(s, e);
			errorText("<" + oldStart + "," + oldEnd + "> -> <" +
				s + "," + e + ">");
		}
		catch (Exception exp) {
			errorText(exp.toString());
		}
	}

	public void handleBackward()
	{
		try {
			enum.setText(text.getText());
			int oldStart = getSelectionStart();
			int oldEnd = getSelectionEnd();
			if (oldStart < 1) {
				selectRange(0, 0);
			}
			else {
				int e = enum.following(oldStart-1);
				int s = enum.previous();
				selectRange(s, e);
			}
			//text.select(s, e);
			errorText("<" + oldStart + "," + oldEnd + "> -> <" + s + "," + e + ">");
		}
		catch (Exception exp) {
			errorText(exp.toString());
		}
	}

    public boolean action(Event evt, Object obj)
    {

        if(evt.target instanceof Button && left.equals(obj))
        {
        	handleBackward();
            return true;
        }
        else if(evt.target instanceof Button && right.equals(obj))
        {
        	handleForward();
            return true;
        }
        else if(evt.target instanceof Choice)
        {
        	handleEnumChanged();
            return true;
        }
        return false;
    }

    public boolean handleEvent(Event evt)
    {
    	/*
    	if (evt.id == Event.KEY_RELEASE || evt.id == Event.KEY_PRESS) {
			return true;
    	}
    	else
    	*/
    	if (evt.id == Event.KEY_PRESS || evt.id == Event.KEY_ACTION) {
    		//super.handleEvent(evt);
    		switch (evt.key) {
//    		case '.':
    		case 0x3ef:
    			handleForward();
    			return true;
//    		case ',':
    		case 0x3ee:
    			handleBackward();
    			return true;
    		}
    	}
        else
	    if (evt.id == Event.WINDOW_DESTROY && evt.target == this) {
	        this.setVisible(false);
	        this.dispose();
                if (applet != null) {
                  applet.demoClosed();
               } else System.exit(0);
	        return true;
	    }
        return super.handleEvent(evt);
    }

    public void errorText(String s)
    {
       if (DEBUG)
           System.out.println(s);
    }
}