Source code: jpicedt/format/pstricks/parser/PsPolygonExpression.java
1 /* jPicEdt version 1.3.2, a picture editor for LaTeX.
2 Copyright (C) 1999-2002 Sylvain Reynal
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17
18 Sylvain Reynal
19 Département de Physique
20 Ecole Nationale Supérieure de l'Electronique et de ses Applications (ENSEA)
21 6, avenue du Ponceau
22 95014 CERGY CEDEX
23 FRANCE
24
25 Tel : 00 +33 130 736 245
26 Fax : 00 +33 130 736 667
27 e-mail : reynal@ensea.fr
28 jPicEdt web page : http://www.jpicedt.org
29 */
30
31 package jpicedt.format.pstricks.parser;
32
33 import jpicedt.graphic.io.parser.*;
34 import jpicedt.graphic.model.*;
35 import jpicedt.graphic.PicPoint;
36
37 /**
38 * Parses \\pspolygon, \\psdots and \\psline commands : <ul>
39 * <li>\\pspolygon[param](2,4)(3,15) // NO ARROW ALLOWED HERE !<br>
40 * <li>\\pspolygon*[param](5,1)(5,8)...(xN,yN)<br>
41 * <li>\\psline[param]{arrows}(5,1)(5,8)...(xN,yN)<br>
42 * <li>\\psline*[param]{arrows}(5,1)(5,8)...(xN,yN)<br>
43 * <li>\\psdots[param]{arrows}(5,1)(5,8)...(xN,yN)<br>
44 * <li>\\psdots*[param]{arrows}(5,1)(5,8)...(xN,yN) (same as above, '*' being unused)<br>
45 * </ul>
46 * Note : PsPolygon -> close path ; PsLine -> open path ; PsDots -> dots only<br>
47 * @author $Author: reynal $
48 * @version $Id: PsPolygonExpression.java,v 1.2 2002/08/05 16:44:10 reynal Exp $
49 */
50 public class PsPolygonExpression extends SequenceExpression implements PicObjectConstants {
51
52 private Pool pool;
53 private String type;
54 public static final String POLYGON = "\\pspolygon";
55 public static final String LINE = "\\psline";
56 public static final String DOTS = "\\psdots";
57
58 /**
59 * Uses the given type as the default tag
60 */
61 public PsPolygonExpression(Pool pl, String type){
62 this(pl,type,null);
63 }
64
65 /**
66 * @param shape POLYGON, LINE or DOTS
67 * @param tag if null, default to shape
68 */
69 public PsPolygonExpression(Pool pl, String shape, String tag){
70
71 super(true); // throw IncompleteSequence Exception
72 pool = pl;
73 this.type = shape;
74 if (tag==null) tag = shape;
75
76 PicPolygon prototype = new PicPolygon();
77 if (type==POLYGON) prototype.setClosed(true);
78 else prototype.setClosed(false);
79
80 add(new PSTInstanciationExpression(tag, prototype,pool));
81 add(WHITE_SPACES_OR_EOL);
82 add(new OptionalExpression(new StarExpression(pool)));
83 add(WHITE_SPACES_OR_EOL);
84 // add optional param here
85 add(new OptionalExpression(new EnclosingExpression("[",new PSTParametersExpression(pool,Pool.CURRENT_OBJ_ATTRIBUTES),"]"))); // push in object's attributeSet
86 // add arrows if type==LINE
87 if (type==LINE) add(new OptionalExpression(new PSTArrowExpression(pool)));
88 // multi-points :
89 add(WHITE_SPACES_OR_EOL);
90 int minNbPts = (type==DOTS ? 1 : 2);
91 add(new RepeatExpression(new SequenceExpression(
92 WHITE_SPACES_OR_EOL,
93 new PicPointExpression("(",",",")"){
94 public void action(ParserEvent e){
95 if (DEBUG) System.out.println(e);
96 PicPoint pt = (PicPoint)e.getValue();
97 ((PicPolygon)(pool.currentObj)).addPoint(pt.toMm(pool.getDouble(PstricksParser.KEY_X_UNIT),pool.getDouble(PstricksParser.KEY_Y_UNIT)));
98 if (type==DOTS) pool.currentObj.setAttribute(POLYGON_STYLE,POLYGON_DOTS);
99 else pool.currentObj.setAttribute(POLYGON_STYLE,POLYGON_SOLID);
100 }
101 }),minNbPts, AT_LEAST));
102 }
103
104 public String toString(){
105 return "[PsPolygonExpression."+type+"]";
106 }
107 }