/*   
ZZDefaultText.java
 *    
 *    Copyright (c) 2000, Ted Nelson and Tuomas Lukka
 *
 *    You may use and distribute under the terms of either the GNU Lesser
 *    General Public License, either version 2 of the license or,
 *    at your choice, any later version. Alternatively, you may use and
 *    distribute under the terms of the XPL.
 *
 *    See the LICENSE.lgpl and LICENSE.xpl files for the specific terms of 
 *    the licenses.
 *
 *    This software 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 README
 *    file for more details.
 *
 */
/*
 * Written by Tuomas Lukka
 */
package org.gzigzag;
import java.awt.*;

/** A simple implementation of ZZText.
 */

public class ZZDefaultText extends ZZText {
String rcsid = "$Id: ZZDefaultText.java,v 1.2 2000/10/19 17:04:26 tjl Exp $";

    public String getText(ZZCell c) {
	return c.getText();
    }

    public void setText(ZZCell c, String s) {
	c.disconnect("d.reftext", 1);
	// XXX Delete all cells there too?
	c.setText(s);
    }

    public boolean isRef(ZZCell c) {
	return c.s("d.reftext") != null;
    }

    public void delete(ZZCell c, int start) {
	// XXX faster
	delete(c, start, getText(c).length());
    }

    public void delete(ZZCell c, int start, int end) {
	if(isRef(c)) {
	} else {
	}
    }

    public void insertNewRef(ZZCell c, String txt, int offs) {
	ensureRef(c);
    }

    public void insertRef(ZZCell c, Span sp, int offs) {
	ensureRef(c);
    }

    public Span[] getSpans(ZZCell c) {
	LoopDetector ld = new LoopDetector();
	ZZCell v = c.s("d.reftext");
	return null;
    }
    public Span[] getSpans(ZZCell c, int start) {
	LoopDetector ld = new LoopDetector();
	ZZCell v = c.s("d.reftext");
	return null;
    }
    public Span[] getSpans(ZZCell c, int start, int end) {
	LoopDetector ld = new LoopDetector();
	ZZCell v = c.s("d.reftext");
	return null;
    }
    public void setSpans(ZZCell c, Span[] spans) {
    }
    

    Span makeSpan(ZZCell c, String s) {
	StringScroll sc = c.getSpace().getStringScroll();
	long offs = sc.append(s);
	return Span.create(Address.scrollOffs(sc, offs),
		           Address.scrollOffs(sc, offs+s.length()-1));
    }

    void ensureRef(ZZCell c) {
	if(c.s("d.reftext") == null) {
	    Span sp = makeSpan(c, getText(c));
	    ZZCell n = c.N("d.reftext", 1);
	    n.setSpan(sp);
	}
    }

}