150 lines
3.8 KiB
Java
150 lines
3.8 KiB
Java
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/*
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SlicedCursor.java
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*
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* Copyright (c) 2000, Ted Nelson and Tuomas Lukka
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*
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* You may use and distribute under the terms of either the GNU Lesser
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* General Public License, either version 2 of the license or,
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* at your choice, any later version. Alternatively, you may use and
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* distribute under the terms of the XPL.
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*
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* See the LICENSE.lgpl and LICENSE.xpl files for the specific terms of
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* the licenses.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the README
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* file for more details.
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*
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*/
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/*
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* Written by Tuomas Lukka
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*/
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package org.gzigzag;
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import org.gzigzag.*;
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import java.util.*;
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/** A dimension for the sliced space cursor.
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*/
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class KUHELFMSKUFHSUKFMSEF { }
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/*
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public class SlicedCursor extends Sliced {
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public static final String rcsid = "$Id: SlicedCursor.java,v 1.7 2000/11/07 23:07:34 tjl Exp $";
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static boolean dbg = true;
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static final void p(String s) { if(dbg) System.out.println(s); }
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String prefletdim;
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// Need several mappings:
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// Our cells to preflet cells in s0.
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Hashtable our2prefs = new Hashtable();
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// Preflet cells to our cells.
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Hashtable pref2ours = new Hashtable();
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SlicedCursor(ZZSlicedDimSpace ss, ZZDimension[] s,
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String prefletdim) {
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super(ss, s);
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this.prefletdim = prefletdim;
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ZZCell pr = sds.slices[0].getHomeCell();
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while((pr = pr.s(prefletdim, 1)) != null) {
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loadPref(pr);
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}
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}
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// This cell is from the subspace.
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void loadPref(ZZCell c) {
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String t = c.getText();
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String i = sds.getConvID(0, c.getID());
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our2prefs.put(t, i);
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pref2ours.put(i, t);
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}
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public String s(String c, int steps, ZZObs o) {
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// Do one by one
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// VERY unoptimized.
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String orig = c;
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if(o != null) triggers.addObs(orig, o);
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int origsteps = steps;
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if(steps > 0) {
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while(--steps >= 0) {
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String n = getOneStepPos(c, o);
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if(n==null) return null;
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if(o != null) triggers.addObs(n, o);
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c=n;
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}
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} else {
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while(++steps <= 0) {
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String n = getOneStepNeg(c, o);
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if(n==null) return null;
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if(o != null) triggers.addObs(n, o);
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c=n;
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}
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}
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p("Cursor getsteps: "+orig+" "+steps+" "+c);
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return c;
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}
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String getOneStepNeg(String c, ZZObs o) {
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// First, if there is a real connection
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String s = super.s(c, -1, o);
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if(s == null) return null;
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// Then, this might be a preflet.
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// Then, if it's in either hashtable
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String p = (String)pref2ours.get(s);
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if(p != null)
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return p;
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return s;
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}
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String getOneStepPos(String c, ZZObs o) {
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String s = (String)our2prefs.get(c);
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if(s != null) {
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s = super.s(s, 1, o);
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// But if there's nothing, don't.
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if(s != null) return s;
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}
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// It was not *that* special case. Now,
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s = super.s(c, 1, o);
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return s;
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}
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public void insert(String c, int dir, String d) {
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throw new ZZError("No direct insert along d.cursor allowed!");
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}
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public void connect(String c, String d) {
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int ci = sds.getSliceID(c);
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int di = sds.getSliceID(d);
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if(ci == di) {
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slices[ci].connect(sds.getOrigID(c), sds.getOrigID(d));
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return;
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}
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if(di != 0)
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throw new ZZError("SlicedStpr: can't use non-slice0 cursors");
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String pref = (String)our2prefs.get(c);
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if(pref == null) {
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// No preflet, have to create our own.
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ZZCell pr = sds.slices[0].getHomeCell().N(prefletdim, 1);
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pr.setText(c);
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loadPref(pr);
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pref = pr.getID();
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}
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slices[0].connect(sds.getOrigID(pref), sds.getOrigID(d));
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triggers.chg(c);
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triggers.chg(d);
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}
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public void disconnect(String c, int dir) {
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if(dir < 0) {
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slices[0].disconnect(sds.getOrigID(c), -1);
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} else {
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throw new ZZError("Can't disconnect poswards in slicedcursor");
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}
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}
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}
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*/
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