source: josm/trunk/src/org/openstreetmap/josm/gui/mappaint/mapcss/MapCSSParser.jj@ 6532

Last change on this file since 6532 was 6532, checked in by Don-vip, 12 years ago

fix #8687, see #9414, see #9470 - tagchecker: update numeric tests to new MapCSS format, with embedded unit tests. MapCSS syntax updated a bit for regex.
File size: 15.3 KB
Line 
1// License: GPL. For details, see LICENSE file.
2options {
3 STATIC = false;
4 OUTPUT_DIRECTORY = "parsergen";
5}
6
7PARSER_BEGIN(MapCSSParser)
8package org.openstreetmap.josm.gui.mappaint.mapcss.parsergen;
9
10import java.awt.Color;
11import java.util.ArrayList;
12import java.util.List;
13
14import org.openstreetmap.josm.gui.mappaint.Keyword;
15import org.openstreetmap.josm.gui.mappaint.mapcss.Condition;
16import org.openstreetmap.josm.gui.mappaint.mapcss.Condition.Context;
17import org.openstreetmap.josm.gui.mappaint.mapcss.Expression;
18import org.openstreetmap.josm.gui.mappaint.mapcss.Instruction;
19import org.openstreetmap.josm.gui.mappaint.mapcss.MapCSSRule;
20import org.openstreetmap.josm.gui.mappaint.mapcss.MapCSSStyleSource;
21import org.openstreetmap.josm.gui.mappaint.mapcss.Selector;
22import org.openstreetmap.josm.gui.mappaint.mapcss.ExpressionFactory;
23import org.openstreetmap.josm.gui.mappaint.mapcss.LiteralExpression;
24import org.openstreetmap.josm.gui.mappaint.mapcss.MapCSSException;
25import org.openstreetmap.josm.gui.mappaint.mapcss.Selector.ChildOrParentSelector;
26import org.openstreetmap.josm.gui.mappaint.mapcss.Selector.GeneralSelector;
27import org.openstreetmap.josm.gui.mappaint.mapcss.Selector.LinkSelector;
28import org.openstreetmap.josm.tools.Pair;
29import org.openstreetmap.josm.tools.Utils;
30import org.openstreetmap.josm.Main;
31
32public class MapCSSParser {
33 MapCSSStyleSource sheet;
34}
35PARSER_END(MapCSSParser)
36
37/*************
38 * Token definitions
39 */
40
41<DEFAULT>
42TOKEN:
43{
44 < IDENT: ["a"-"z","A"-"Z","_"] ( ["a"-"z","A"-"Z","_","-","0"-"9"] )* >
45| < UINT: ["1"-"9"] ( ["0"-"9"] )* >
46| < UFLOAT: ( ["0"-"9"] )+ ( "." ( ["0"-"9"] )+ )? >
47| < STRING: "\"" ( [" ","!","#"-"[","]"-"~","\u0080"-"\uFFFF"] | "\\\"" | "\\\\" )* "\"" >
48| < #REGEX_CHAR_WITHOUT_STAR: [" "-")","+"-".","0"-"[","]"-"~","\u0080"-"\uFFFF"] | "\\/" | "\\\\" | "\\[" | "\\]" | "\\+" | "\\." | "\\'" | "\\\"" >
49| < REGEX: "/" <REGEX_CHAR_WITHOUT_STAR> ( <REGEX_CHAR_WITHOUT_STAR> | "*" )* "/" >
50| < #H: ["0"-"9","a"-"f","A"-"F"] >
51| < HEXCOLOR: "#" ( <H><H><H><H><H><H> | <H><H><H> ) >
52| < S: ( " " | "\t" | "\n" | "\r" | "\f" )+ >
53| < STAR: "*" >
54| < SLASH: "/" >
55| < LBRACE: "{" >
56| < RBRACE: "}" >
57| < LSQUARE: "[" >
58| < RSQUARE: "]" >
59| < LPAR: "(" >
60| < RPAR: ")" >
61| < GREATER_EQUAL: ">=" >
62| < LESS_EQUAL: "<=" >
63| < GREATER: ">" >
64| < LESS: "<" >
65| < EQUAL: "=" >
66| < EXCLAMATION: "!" >
67| < TILDE: "~" >
68| < COLON: ":" >
69| < DCOLON: "::" >
70| < SEMICOLON: ";" >
71| < COMMA: "," >
72| < PIPE: "|" >
73| < PIPE_Z: "|z" >
74| < PLUS: "+" >
75| < MINUS: "-" >
76| < AMPERSAND: "&" >
77| < QUESTION: "?" >
78| < DOLLAR: "$" >
79| < CARET: "^" >
80| < COMMENT_START: "/*" > : COMMENT
81| < UNEXPECTED_CHAR : ~[] > // avoid TokenMgrErrors because they are hard to recover from
82}
83
84<COMMENT>
85TOKEN:
86{
87 < COMMENT_END: "*/" > : DEFAULT
88}
89
90<COMMENT>
91SKIP:
92{
93 < ~[] >
94}
95
96/*************
97 * Parser definitions
98 *
99 * rule
100 * _______________________|______________________________
101 * | |
102 * selector declaration
103 * _________|___________________ _________|____________
104 * | | | |
105 *
106 * way|z11-12[highway=residential] { color: red; width: 3 }
107 *
108 * |_____||___________________| |_________|
109 * | | |
110 * zoom condition instruction
111 *
112 * more general:
113 *
114 * way|z13-[a=b][c=d]::subpart, way|z-3[u=v]:closed::subpart2 { p1 : val; p2 : val; }
115 *
116 * 'val' can be a literal, or an expression like "prop(width, default) + 0.8".
117 *
118 */
119
120int uint() :
121{
122 Token i;
123}
124{
125 i=<UINT> { return Integer.parseInt(i.image); }
126}
127
128int int_() :
129{
130 int i;
131}
132{
133 <MINUS> i=uint() { return -i; } | i=uint() { return i; }
134}
135
136float ufloat() :
137{
138 Token f;
139}
140{
141 ( f=<UFLOAT> | f=<UINT> )
142 { return Float.parseFloat(f.image); }
143}
144
145float float_() :
146{
147 float f;
148}
149{
150 <MINUS> f=ufloat() { return -f; } | f=ufloat() { return f; }
151}
152
153String string() :
154{
155 Token t;
156}
157{
158 t=<STRING>
159 { return t.image.substring(1, t.image.length() - 1).replace("\\\"", "\"").replace("\\\\", "\\"); }
160}
161
162String string_or_ident() :
163{
164 Token t;
165 String s;
166}
167{
168 t=<IDENT> { return t.image; } | s=string() { return s; }
169}
170
171String regex() :
172{
173 Token t;
174}
175{
176 t=<REGEX>
177 { return t.image.substring(1, t.image.length() - 1); }
178}
179
180/**
181 * white-space
182 */
183void s() :
184{
185}
186{
187 ( <S> )?
188}
189
190/**
191 * mix of white-space and comments
192 */
193void w() :
194{
195}
196{
197 ( <S> | <COMMENT_START> <COMMENT_END> )*
198}
199
200/**
201 * comma delimited list of floats (at least 2, all >= 0)
202 */
203List<Float> float_array() :
204{
205 float f;
206 List<Float> fs = new ArrayList<Float>();
207}
208{
209 f=ufloat() { fs.add(f); }
210 (
211 <COMMA> s()
212 f=ufloat() { fs.add(f); }
213 )+
214 {
215 return fs;
216 }
217}
218
219/**
220 * root
221 */
222void sheet(MapCSSStyleSource sheet):
223{
224 MapCSSRule r;
225 Token com = null;
226}
227{
228 { this.sheet = sheet; }
229 w()
230 (
231 try {
232 r=rule() { if (r != null) { sheet.rules.add(r); } } w()
233 } catch (MapCSSException mex) {
234 error_skipto(RBRACE, mex);
235 w();
236 } catch (ParseException ex) {
237 error_skipto(RBRACE, null);
238 w();
239 }
240 )*
241 <EOF>
242}
243
244MapCSSRule rule():
245{
246 List<Selector> selectors = new ArrayList<Selector>();
247 Selector sel;
248 List<Instruction> decl;
249}
250{
251 sel=child_selector() { selectors.add(sel); }
252 (
253 <COMMA> w()
254 sel=child_selector() { selectors.add(sel); }
255 )*
256 decl=declaration()
257 { return new MapCSSRule(selectors, decl); }
258}
259
260Selector child_selector() :
261{
262 boolean parentSelector = false;
263 Condition c;
264 List<Condition> conditions = new ArrayList<Condition>();
265 Selector selLeft;
266 LinkSelector selLink = null;
267 Selector selRight = null;
268}
269{
270 selLeft=selector() w()
271 (
272 ( <GREATER> { parentSelector = false; } | <LESS> { parentSelector = true; } )
273 ( ( c=condition(Context.LINK) | c=pseudoclass(Context.LINK) ) { conditions.add(c); } )*
274 { selLink = new LinkSelector(conditions); }
275 w()
276 selRight=selector() w()
277 )?
278 { return selRight != null ? new ChildOrParentSelector(selLeft, selLink, selRight, parentSelector) : selLeft; }
279}
280
281Selector selector() :
282{
283 Token base;
284 Condition c;
285 Pair<Integer, Integer> r = null;
286 List<Condition> conditions = new ArrayList<Condition>();
287 String sub = null;
288}
289{
290 ( base=<IDENT> | base=<STAR> )
291 ( r=zoom() )?
292 ( ( c=condition(Context.PRIMITIVE) | c=pseudoclass(Context.PRIMITIVE) ) { conditions.add(c); } )*
293 ( sub=subpart() )?
294 { return new GeneralSelector(base.image, r, conditions, sub); }
295}
296
297Pair<Integer, Integer> zoom() :
298{
299 Integer min = 0;
300 Integer max = Integer.MAX_VALUE;
301}
302{
303 <PIPE_Z>
304 (
305 <MINUS> max=uint()
306 |
307 LOOKAHEAD(2)
308 min=uint() <MINUS> ( max=uint() )?
309 |
310 min=uint() { max = min; }
311 )
312 { return new Pair<Integer, Integer>(min, max); }
313}
314
315Condition condition(Context context) :
316{
317 Condition c;
318 Expression e;
319}
320{
321 <LSQUARE> s()
322 (
323 LOOKAHEAD( simple_key_condition(context) s() <RSQUARE> )
324 c=simple_key_condition(context) s() <RSQUARE> { return c; }
325 |
326 LOOKAHEAD( simple_key_value_condition(context) s() <RSQUARE> )
327 c=simple_key_value_condition(context) s() <RSQUARE> { return c; }
328 |
329 e=expression() <RSQUARE> { return Condition.create(e, context); }
330 )
331}
332
333String tag_key() :
334{
335 String s;
336 Token t;
337}
338{
339 s=string() { return s; }
340 |
341 t=<IDENT> { s = t.image; } ( <COLON> t=<IDENT> { s += ':' + t.image; } )* { return s; }
342}
343
344Condition simple_key_condition(Context context) :
345{
346 boolean not = false;
347 boolean yes = false;
348 boolean no = false;
349 String key;
350}
351{
352 ( <EXCLAMATION> { not = true; } )?
353 key=tag_key()
354 ( LOOKAHEAD(2) <QUESTION> <EXCLAMATION> { no = true; } )?
355 ( <QUESTION> { yes = true; } )?
356 { return Condition.create(key, not, yes, no, context); }
357}
358
359Condition simple_key_value_condition(Context context) :
360{
361 String key;
362 String val;
363 float f;
364 int i;
365 Condition.Op op;
366}
367{
368 key=tag_key() s()
369 (
370 LOOKAHEAD(2)
371 <EQUAL> <TILDE> { op=Condition.Op.REGEX; } s() val=regex()
372 |
373 LOOKAHEAD(2)
374 <EXCLAMATION> <TILDE> { op=Condition.Op.NREGEX; } s() val=regex()
375 |
376 (
377 <EXCLAMATION> <EQUAL> { op=Condition.Op.NEQ; }
378 |
379 <EQUAL> { op=Condition.Op.EQ; }
380 |
381 <TILDE> <EQUAL> { op=Condition.Op.ONE_OF; }
382 |
383 <CARET> <EQUAL> { op=Condition.Op.BEGINS_WITH; }
384 |
385 <DOLLAR> <EQUAL> { op=Condition.Op.ENDS_WITH; }
386 |
387 <STAR> <EQUAL> { op=Condition.Op.CONTAINS; }
388 )
389 s()
390 (
391 LOOKAHEAD(2)
392 i=int_() { val=Integer.toString(i); }
393 |
394 f=float_() { val=Float.toString(f); }
395 |
396 val=string_or_ident()
397 )
398 |
399 (
400 <GREATER_EQUAL> { op=Condition.Op.GREATER_OR_EQUAL; }
401 |
402 <GREATER> { op=Condition.Op.GREATER; }
403 |
404 <LESS_EQUAL> { op=Condition.Op.LESS_OR_EQUAL; }
405 |
406 <LESS> { op=Condition.Op.LESS; }
407 )
408 s()
409 f=float_() { val=Float.toString(f); }
410 )
411 { return Condition.create(key, val, op, context); }
412}
413
414Condition pseudoclass(Context context) :
415{
416 Token t;
417 boolean not = false;
418}
419{
420 ( <EXCLAMATION> { not = true; } )?
421 <COLON>
422 t=<IDENT>
423 { return Condition.create(t.image, not, context); }
424}
425
426String subpart() :
427{
428 Token t;
429}
430{
431 <DCOLON>
432 ( t=<IDENT> | t=<STAR> )
433 { return t.image; }
434}
435
436List<Instruction> declaration() :
437{
438 List<Instruction> ins = new ArrayList<Instruction>();
439 Instruction i;
440 Token key;
441 Object val;
442}
443{
444 <LBRACE> w()
445 (
446 key=<IDENT> w() <COLON> w()
447 (
448 LOOKAHEAD( float_array() w() ( <SEMICOLON> | <RBRACE> ) )
449 val=float_array()
450 { ins.add(new Instruction.AssignmentInstruction(key.image, val)); }
451 w()
452 ( <RBRACE> { return ins; } | <SEMICOLON> w() )
453 |
454 LOOKAHEAD( expression() ( <SEMICOLON> | <RBRACE> ) )
455 val=expression()
456 { ins.add(new Instruction.AssignmentInstruction(key.image, val)); }
457 ( <RBRACE> { return ins; } | <SEMICOLON> w() )
458 |
459 val=readRaw() w() { ins.add(new Instruction.AssignmentInstruction(key.image, val)); }
460 )
461 )*
462 <RBRACE>
463 { return ins; }
464}
465
466Expression expression():
467{
468 List<Expression> args = new ArrayList<Expression>();
469 Expression e;
470 String op = null;
471}
472{
473 (
474 <EXCLAMATION> { op = "not"; } w() e=primary() { args.add(e); } w()
475 |
476 <MINUS> { op = "minus"; } w() e=primary() { args.add(e); } w()
477 |
478
479 (
480 e=primary() { args.add(e); } w()
481 (
482 ( <PLUS> { op = "plus"; } w() e=primary() { args.add(e); } w() )+
483 |
484 ( <STAR> { op = "times"; } w() e=primary() { args.add(e); } w() )+
485 |
486 ( <MINUS> { op = "minus"; } w() e=primary() { args.add(e); } w() )+
487 |
488 ( <SLASH> { op = "divided_by"; } w() e=primary() { args.add(e); } w() )+
489 |
490 <GREATER_EQUAL> { op = "greater_equal"; } w() e=primary() { args.add(e); } w()
491 |
492 <LESS_EQUAL> { op = "less_equal"; } w() e=primary() { args.add(e); } w()
493 |
494 <GREATER> { op = "greater"; } w() e=primary() { args.add(e); } w()
495 |
496 <EQUAL> ( <EQUAL> )? { op = "equal"; } w() e=primary() { args.add(e); } w()
497 |
498 <LESS> { op = "less"; } w() e=primary() { args.add(e); } w()
499 |
500 <AMPERSAND> <AMPERSAND> { op = "and"; } w() e=primary() { args.add(e); } w()
501 |
502 <PIPE> <PIPE> { op = "or"; } w() e=primary() { args.add(e); } w()
503 |
504 <QUESTION> { op = "cond"; } w() e=primary() { args.add(e); } w() <COLON> w() e=primary() { args.add(e); } w()
505 )?
506 )
507 )
508 {
509 if (op == null)
510 return args.get(0);
511 return ExpressionFactory.createFunctionExpression(op, args);
512 }
513}
514
515Expression primary() :
516{
517 Expression nested;
518 Expression fn;
519 Object lit;
520}
521{
522 LOOKAHEAD(3) // both function and identifier start with an identifier (+ optional whitespace)
523 fn=function() { return fn; }
524 |
525 lit=literal() { return new LiteralExpression(lit); }
526 |
527 <LPAR> w() nested=expression() <RPAR> { return nested; }
528}
529
530Expression function() :
531{
532 Token tmp;
533 Expression arg;
534 String name;
535 List<Expression> args = new ArrayList<Expression>();
536}
537{
538 tmp=<IDENT> { name = tmp.image; } w()
539 <LPAR> w()
540 (
541 arg=expression() { args.add(arg); }
542 ( <COMMA> w() arg=expression() { args.add(arg); } )*
543 )?
544 <RPAR>
545 { return ExpressionFactory.createFunctionExpression(name, args); }
546}
547
548Object literal() :
549{
550 String val;
551 Token t;
552 float f;
553}
554{
555 t=<IDENT> { return new Keyword(t.image); }
556 |
557 val=string() { return val; }
558 |
559 <PLUS> f=ufloat() { return new Instruction.RelativeFloat(f); }
560 |
561 f=ufloat() { return f; }
562 |
563 t=<HEXCOLOR> { return Utils.hexToColor(t.image); }
564}
565
566JAVACODE
567void error_skipto(int kind, MapCSSException me) {
568 if (token.kind == EOF)
569 throw new ParseException("Reached end of file while parsing");
570
571 Exception e = null;
572 ParseException pe = generateParseException();
573
574 if (me != null) {
575 me.setLine(pe.currentToken.next.beginLine);
576 me.setColumn(pe.currentToken.next.beginColumn);
577 e = me;
578 } else {
579 e = new ParseException(pe.getMessage()); // prevent memory leak
580 }
581
582 Main.error("Skipping to the next rule, because of an error:");
583 Main.error(e);
584 if (sheet != null) {
585 sheet.logError(e);
586 }
587 Token t;
588 do {
589 t = getNextToken();
590 } while (t.kind != kind && t.kind != EOF);
591 if (t.kind == EOF)
592 throw new ParseException("Reached end of file while parsing");
593}
594
595JAVACODE
596/**
597 * read everything to the next semicolon
598 */
599String readRaw() {
600 Token t;
601 StringBuilder s = new StringBuilder();
602 while (true) {
603 t = getNextToken();
604 if ((t.kind == S || t.kind == STRING || t.kind == UNEXPECTED_CHAR) &&
605 t.image.contains("\n")) {
606 ParseException e = new ParseException(String.format("Warning: end of line while reading an unquoted string at line %s column %s.", t.beginLine, t.beginColumn));
607 Main.error(e);
608 if (sheet != null) {
609 sheet.logError(e);
610 }
611 }
612 if (t.kind == SEMICOLON || t.kind == EOF)
613 break;
614 s.append(t.image);
615 }
616 if (t.kind == EOF)
617 throw new ParseException("Reached end of file while parsing");
618 return s.toString();
619}
620
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