Source code: jpicedt/format/latex/parser/LaTeXParser.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.latex.parser;
32
33 import jpicedt.graphic.io.parser.RootExpression;
34 import jpicedt.graphic.io.parser.Pool;
35 import jpicedt.graphic.io.parser.ExpressionConstants;
36
37 import jpicedt.graphic.PicPoint;
38 import jpicedt.graphic.model.*;
39
40 import java.awt.Color;
41 import java.io.*;
42 import java.util.*;
43
44 /**
45 * Grammar rules for the LaTeX's picture environment parser
46 */
47 public class LaTeXParser extends RootExpression implements ExpressionConstants {
48
49 /** key associated with unit-length parameter (double) */
50 public static final Pool.Key KEY_UNIT_LENGTH = new Pool.Key("latex.unit-length");
51
52 /** key associated with the shared attribute set (PicAttributeSet) */
53 public static final Pool.Key KEY_ATTRIBUTES = new Pool.Key("latex.attributes");
54
55 private Pool pool;
56
57 /**
58 * Creates a new LaTeXParser, and build grammar rules
59 * @param pool a hashmap used to share variables across the grammar tree
60 */
61 public LaTeXParser(Pool pool) {
62 this.pool = pool;
63
64 // 0°) unitlength and begin picture
65 add(new UnitLengthExpression(pool)); // \\unitlength
66 add(new BeginPictureExpression()); // not used (but otherwise, it's considered a non-parsable exp)
67
68 // 1°) parameters
69 add(new LineThicknessExpression(pool)); // \\linethickness
70
71 // 2°) groups
72 add(new PicGroupExpression(pool)); // %Begin|End group
73
74 // 3°) lines & polygons
75 add(new PicLineExpression(pool)); // %PicLine
76 add(new PicPolygonExpression(pool)); // %PicPolygon
77
78 // 4°) frames
79 add(new PicRectangleExpression(pool)); // %PicRectangle
80
81 // 5°) ellipses and arcs
82 add(new PicEllipseExpression(pool)); // %PicEllipse
83
84 // 6°) splines
85 add(new PicBezierExpression(pool)); // %PicBezier (quad)
86
87 // 6°) splines
88 add(new LaTeXBezierExpression(pool)); // \\qbezier or \\bezier{N}
89
90 // 7°) text and misc.
91 add(new LaTeXPutExpression(pool)); // \\put(x,y){...} -> PicText, PicPut (also support LaTeX's "\\circle" command w/o PicEdt comment line)
92
93 // 8°) comment
94 add(new jpicedt.graphic.io.parser.CommentExpression("%"));
95
96 // [todo] multiput
97
98 // throw ParserException.EndOfPicture to signals that a \end{picture} was found
99 // and that the parsing process ends up here (otherwise, we stop at EOF)
100 add(new EndPictureExpression());
101 }
102
103
104 /**
105 * reinit LaTeX related parameters
106 */
107 public void reinit(){
108
109 PicAttributeSet ltxSet = new PicAttributeSet();
110 double unitLength = 1; // 1mm
111 pool.put(KEY_UNIT_LENGTH, new Double(unitLength));
112 pool.put(KEY_ATTRIBUTES, ltxSet);
113 }
114 }