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Modules/zaubertrank/ZaubertrankCellView.java

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+/*   
+ZaubertrankCellView.zob
+ *    
+ *    Copyright (c) 2001, Benja Fallenstein
+ *
+ *    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 Benja Fallenstein
+ */
+
+package org.gzigzag;
+import java.util.*;
+import java.awt.*;
+
+/** A cell view for showing one zaubertrank statement/entity/sentence etc.
+ *  This is assembled from a number of tokens.
+ */
+ 
+public class ZaubertrankCellView extends FTextCellView {
+public static final String rcsid = "$Id: ZaubertrankCellView.java,v 1.1 2001/04/02 20:23:13 bfallenstein Exp $";
+    public static boolean dbg = false;
+    private static void p(String s) { if(dbg) ZZLogger.log(s); }
+    private static void pa(String s) { ZZLogger.log(s); }
+
+    public static String zttext = "d.zt-text";
+    public static String ztparams = "d.zt-params", ztvalue = "d.zt-value";
+    public static String zttype = "d.zt-type";
+
+
+
+    /** Add the FText parts for the token at c0 to the vector. */
+    final void addToken(Vector v, ZZCell c0, Color bg, int scale) {
+	p("add token "+c0);
+	/** The background color to pass on to subordinate tokens.
+	 *  The background of an accursed token is the color of the cursor;
+	 *  the backgrounds of the subordinate tokens are lighter.
+	 */
+	Color newBg = bg;
+		
+	// See whether there's a cursor accursing the token, and take its color.
+	Color col = ZZCursorReal.getAccursedColor(c0);
+/* This looks awkward when the cell the cellview's called with is used.
+	if(col == null) {
+	    ZZCell parcell = c0.s(ztvalue, -1);
+	    if(parcell != null)
+		col = ZZCursorReal.getAccursedColor(parcell);
+	}
+*/
+	if(col != null) {
+	    bg = col;
+	    newBg = col.brighter();
+	}
+	
+	// Add the token's text.
+	for(ZZCell c = c0.getRootclone().s(zttext); c != null; c = c.s(zttext)) {
+	    if(c.getRootclone().equals(c))
+		addCellPart(v, c, bg, scale);
+	    else
+		addSubordinateToken(v, c0, c, newBg, scale);
+	}
+    }
+
+
+
+    final void addSubordinateToken(Vector v, ZZCell c0, ZZCell c,
+				   Color bg, int scale) {
+	p("add subtoken "+c0+" "+c);
+	ZZCell root0 = c0.getRootclone(), root = c.getRootclone();
+						
+	/** The distance between root and root0 on d.zt-params.
+	 */
+	int n = 0;
+
+	for(ZZCell d = root; d != root0; d = d.s(ztparams, -1)) {
+	    if(d == null)
+		throw new SyntaxError("Found a param in a token's text which "
+			+ "is not on the token's params list. Token: " + c0
+			+ ", param: " + c);
+	    n++;
+	}
+	
+	ZZCell param = c0.s(ztparams, n), val = null;
+	if(param != null) val = param.s(ztvalue);
+	
+	if(val != null)
+	    addToken(v, val, bg, scale);
+	else
+	    addTypeQuestion(v, root, param, bg, scale);
+    }
+
+
+
+    final void addTypeQuestion(Vector v, ZZCell root, ZZCell param, 
+			       Color bg, int scale) {
+	p("add type question "+root+" "+param);
+	if(param != null) {
+	    Color col = ZZCursorReal.getAccursedColor(param);
+	    if(col != null) bg = col;
+	}
+	
+	ZZCell type = root.h(zttype, true);
+	if(type == null)
+	    throw new SyntaxError("No type assigned to param: " + param);
+	addCellPart(v, type, bg, scale);
+    }
+
+
+
+    /** Get the FText for this cell at the given scale.
+     *  scale == fract * 1000.
+     */
+    protected FText getFText(ZZCell c0, int scale) {
+	ZZCell c = c0.s(ztvalue);
+	if(c == null) return new FText(new FText.Part[0]);
+	
+	Vector v = new Vector();
+	addToken(v, c, null, scale);
+	return new FText(v);
+    }
+
+
+
+    /** Add a cell part to the vector of FText parts. */
+    final void addCellPart(Vector v, ZZCell c, Color bg, int scale) {
+	v.addElement(new FText.CellPart(c, 0, -1, f(scale), fm(scale),
+					bg, null));
+    }
+}