source: josm/trunk/src/org/openstreetmap/josm/gui/mappaint/mapcss/MapCSSParser.jj@ 8874

Last change on this file since 8874 was 8874, checked in by simon04, 9 years ago

fix #10467 - MapCSS: allow comparisons in regexp key conditions
File size: 29.3 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.io.InputStream;
11import java.io.Reader;
12import java.util.ArrayList;
13import java.util.Arrays;
14import java.util.Collections;
15import java.util.List;
16import java.util.Locale;
17
18import org.openstreetmap.josm.Main;
19import org.openstreetmap.josm.gui.mappaint.Keyword;
20import org.openstreetmap.josm.gui.mappaint.mapcss.Condition;
21import org.openstreetmap.josm.gui.mappaint.mapcss.Condition.Context;
22import org.openstreetmap.josm.gui.mappaint.mapcss.Expression;
23import org.openstreetmap.josm.gui.mappaint.mapcss.ExpressionFactory;
24import org.openstreetmap.josm.gui.mappaint.mapcss.ExpressionFactory.NullExpression;
25import org.openstreetmap.josm.gui.mappaint.mapcss.Instruction;
26import org.openstreetmap.josm.gui.mappaint.mapcss.LiteralExpression;
27import org.openstreetmap.josm.gui.mappaint.mapcss.MapCSSException;
28import org.openstreetmap.josm.gui.mappaint.mapcss.MapCSSRule;
29import org.openstreetmap.josm.gui.mappaint.mapcss.MapCSSRule.Declaration;
30import org.openstreetmap.josm.gui.mappaint.mapcss.MapCSSStyleSource;
31import org.openstreetmap.josm.gui.mappaint.mapcss.Selector;
32import org.openstreetmap.josm.gui.mappaint.mapcss.Selector.ChildOrParentSelector;
33import org.openstreetmap.josm.gui.mappaint.mapcss.Selector.GeneralSelector;
34import org.openstreetmap.josm.gui.mappaint.mapcss.Selector.LinkSelector;
35import org.openstreetmap.josm.gui.mappaint.mapcss.Subpart;
36import org.openstreetmap.josm.tools.ColorHelper;
37import org.openstreetmap.josm.tools.Pair;
38import org.openstreetmap.josm.tools.Utils;
39
40/**
41 * MapCSS parser.
42 *
43 * Contains two independent grammars:
44 * (a) the preprocessor and (b) the main mapcss parser.
45 *
46 * The preprocessor handles @supports and @media syntax (@media is deprecated).
47 * Basically this allows to write one style for different versions of JOSM (or different editors).
48 * When the @supports condition is not fulfilled, it should simply skip over
49 * the whole section and not attempt to parse the possibly unknown
50 * grammar. It preserves whitespace and comments, in order to keep the
51 * line and column numbers in the error messages correct for the second pass.
52 *
53 */
54
55public class MapCSSParser {
56 MapCSSStyleSource sheet;
57 StringBuilder sb;
58 int declarationCounter;
59
60 /**
61 * Nicer way to refer to a lexical state.
62 */
63 public static enum LexicalState {
64 PREPROCESSOR(0), /* the preprocessor */
65 DEFAULT(2); /* the main parser */
66
67 int idx; // the integer, which javacc assigns to this state
68
69 LexicalState(int idx) {
70 if (!this.name().equals(MapCSSParserTokenManager.lexStateNames[idx])) {
71 throw new RuntimeException();
72 }
73 this.idx = idx;
74 }
75 };
76
77 /**
78 * Constructor which initializes the parser with a certain lexical state.
79 */
80 public MapCSSParser(InputStream in, String encoding, LexicalState initState) {
81 this(createTokenManager(in, encoding, initState));
82 declarationCounter = 0;
83 }
84
85 protected static MapCSSParserTokenManager createTokenManager(InputStream in, String encoding, LexicalState initState) {
86 SimpleCharStream scs;
87 try {
88 scs = new SimpleCharStream(in, encoding, 1, 1);
89 } catch (java.io.UnsupportedEncodingException e) {
90 throw new RuntimeException(e);
91 }
92 return new MapCSSParserTokenManager(scs, initState.idx);
93 }
94
95 /**
96 * Constructor which initializes the parser with a certain lexical state.
97 */
98 public MapCSSParser(Reader in, LexicalState initState) {
99 this(createTokenManager(in, initState));
100 declarationCounter = 0;
101 }
102
103 protected static MapCSSParserTokenManager createTokenManager(Reader in, LexicalState initState) {
104 final SimpleCharStream scs = new SimpleCharStream(in, 1, 1);
105 return new MapCSSParserTokenManager(scs, initState.idx);
106 }
107}
108PARSER_END(MapCSSParser)
109
110/*************
111 * Token definitions
112 *
113 * Lexical states for the preprocessor: <PREPROCESSOR>, <PP_COMMENT>
114 * Lexical states for the main parser: <DEFAULT>, <COMMENT>
115 */
116
117<PREPROCESSOR>
118TOKEN:
119{
120 < PP_AND: "and" >
121| < PP_OR: "or" >
122| < PP_NOT: "not" >
123| < PP_SUPPORTS: "@supports" >
124| < PP_MEDIA: "@media" >
125| < PP_NEWLINECHAR: "\n" | "\r" | "\f" >
126| < PP_WHITESPACE: " " | "\t" >
127| < PP_COMMENT_START: "/*" > : PP_COMMENT
128}
129
130<PP_COMMENT>
131TOKEN:
132{
133 < PP_COMMENT_END: "*/" > : PREPROCESSOR
134}
135
136<PP_COMMENT>
137MORE:
138{
139 < ~[] >
140}
141
142<DEFAULT>
143TOKEN [IGNORE_CASE]:
144{
145 /* Special keyword in some contexts, ordinary identifier in other contexts.
146 Use the parsing rule <code>ident()</code> to refer to a general
147 identifier, including "set". */
148 < SET: "set" >
149}
150
151<DEFAULT,PREPROCESSOR>
152TOKEN:
153{
154 < IDENT: ["a"-"z","A"-"Z","_"] ( ["a"-"z","A"-"Z","_","-","0"-"9"] )* >
155| < UINT: ["1"-"9"] ( ["0"-"9"] )* >
156| < STRING: "\"" ( [" ","!","#"-"[","]"-"~","\u0080"-"\uFFFF"] | "\\\"" | "\\\\" )* "\"" >
157| < #PREDEFINED: "\\" ["d","D","s","S","w","W","b","B","A","G","Z","z"] >
158| < #REGEX_CHAR_WITHOUT_STAR: [" "-")","+"-".","0"-"[","]"-"~","\u0080"-"\uFFFF"] | "\\/" | "\\\\" | "\\[" | "\\]" | "\\+" | "\\." | "\\'" | "\\\"" | "\\(" | "\\)" | "\\{" | "\\}" | "\\?" | "\\*" | "\\^" | "\\$" | "\\|" |<PREDEFINED> >
159| < REGEX: "/" <REGEX_CHAR_WITHOUT_STAR> ( <REGEX_CHAR_WITHOUT_STAR> | "*" )* "/" >
160| < LBRACE: "{" >
161| < RBRACE: "}" >
162| < LPAR: "(" >
163| < RPAR: ")" >
164| < COMMA: "," >
165| < COLON: ":" >
166}
167
168<PREPROCESSOR>
169TOKEN:
170{
171 < PP_SOMETHING_ELSE : ~[] >
172}
173
174<DEFAULT>
175TOKEN:
176{
177 < UFLOAT: ( ["0"-"9"] )+ ( "." ( ["0"-"9"] )+ )? >
178| < #H: ["0"-"9","a"-"f","A"-"F"] >
179| < HEXCOLOR: "#" ( <H><H><H><H><H><H><H><H> | <H><H><H><H><H><H> | <H><H><H> ) >
180| < S: ( " " | "\t" | "\n" | "\r" | "\f" )+ >
181| < STAR: "*" >
182| < SLASH: "/" >
183| < LSQUARE: "[" >
184| < RSQUARE: "]" >
185| < GREATER_EQUAL: ">=" >
186| < LESS_EQUAL: "<=" >
187| < GREATER: ">" >
188| < LESS: "<" >
189| < EQUAL: "=" >
190| < EXCLAMATION: "!" >
191| < TILDE: "~" >
192| < DCOLON: "::" >
193| < SEMICOLON: ";" >
194| < PIPE: "|" >
195| < PIPE_Z: "|z" >
196| < PLUS: "+" >
197| < MINUS: "-" >
198| < AMPERSAND: "&" >
199| < QUESTION: "?" >
200| < DOLLAR: "$" >
201| < CARET: "^" >
202| < FULLSTOP: "." >
203| < DEG: "°" >
204| < ELEMENT_OF: "∈" >
205| < CROSSING: "⧉" >
206| < COMMENT_START: "/*" > : COMMENT
207| < UNEXPECTED_CHAR : ~[] > // avoid TokenMgrErrors because they are hard to recover from
208}
209
210<COMMENT>
211TOKEN:
212{
213 < COMMENT_END: "*/" > : DEFAULT
214}
215
216<COMMENT>
217SKIP:
218{
219 < ~[] >
220}
221
222
223/*************
224 *
225 * Preprocessor parser definitions:
226 *
227 * <pre>
228 *
229 * {@literal @media} { ... } queries are supported, following http://www.w3.org/TR/css3-mediaqueries/#syntax
230 *
231 * media_query
232 * ___________________________|_______________________________
233 * | |
234 * {@literal @media} all and (min-josm-version: 7789) and (max-josm-version: 7790), all and (user-agent: xyz) { ... }
235 * |______________________|
236 * |
237 * media_expression
238 * </pre>
239 */
240
241
242/**
243 * root method for the preprocessor.
244 */
245String pp_root(MapCSSStyleSource sheet):
246{
247}
248{
249 { sb = new StringBuilder(); this.sheet = sheet; }
250 pp_black_box(true) <EOF>
251 { return sb.toString(); }
252}
253
254/**
255 * Parse any unknown grammar (black box).
256 *
257 * Only stop when "@media" is encountered and keep track of correct number of
258 * opening and closing curly brackets.
259 *
260 * @param write false if this content should be skipped (@pp_media condition is not fulfilled), true otherwise
261 */
262void pp_black_box(boolean write):
263{
264 Token t;
265}
266{
267 (
268 (t=<PP_AND> | t=<PP_OR> | t=<PP_NOT> | t=<UINT> | t=<STRING> | t=<REGEX> | t=<LPAR> | t=<RPAR> | t=<COMMA> | t=<COLON> | t=<IDENT> | t=<PP_SOMETHING_ELSE>) { if (write) sb.append(t.image); }
269 |
270 pp_w1()
271 |
272 pp_supports(!write)
273 |
274 pp_media(!write)
275 |
276 t=<LBRACE> { if (write) sb.append(t.image); } pp_black_box(write) t=<RBRACE> { if (write) sb.append(t.image); }
277 )*
278}
279
280/**
281 * Parses an @supports rule.
282 *
283 * @param ignore if the content of this rule should be ignored
284 * (because we are already inside a @supports block that didn't pass)
285 */
286void pp_supports(boolean ignore):
287{
288 boolean pass;
289}
290{
291 <PP_SUPPORTS> pp_w()
292 pass=pp_supports_condition()
293 <LBRACE>
294 pp_black_box(pass && !ignore)
295 <RBRACE>
296}
297
298/**
299 * Parses the condition of the @supports rule.
300 *
301 * Unlike other parsing rules, grabs trailing whitespace.
302 * @return true, if the condition is fulfilled
303 */
304boolean pp_supports_condition():
305{
306 boolean pass;
307 boolean q;
308}
309{
310 (
311 <PP_NOT> pp_w() q=pp_supports_condition_in_parens() { pass = !q; } pp_w()
312 |
313 LOOKAHEAD(pp_supports_condition_in_parens() pp_w() <PP_AND>)
314 pass=pp_supports_condition_in_parens() pp_w()
315 ( <PP_AND> pp_w() q=pp_supports_condition_in_parens() { pass = pass && q; } pp_w() )+
316 |
317 LOOKAHEAD(pp_supports_condition_in_parens() pp_w() <PP_OR>)
318 pass=pp_supports_condition_in_parens() pp_w()
319 ( <PP_OR> pp_w() q=pp_supports_condition_in_parens() { pass = pass || q; } pp_w() )+
320 |
321 pass=pp_supports_condition_in_parens() pp_w()
322 )
323 { return pass; }
324}
325
326/**
327 * Parses something in parenthesis inside the condition of the @supports rule.
328 *
329 * @return true, if the condition is fulfilled
330 */
331boolean pp_supports_condition_in_parens():
332{
333 boolean pass;
334}
335{
336 (
337 LOOKAHEAD(pp_supports_declaration_condition())
338 pass=pp_supports_declaration_condition()
339 |
340 <LPAR> pp_w() pass=pp_supports_condition() <RPAR>
341 )
342 { return pass; }
343}
344
345/**
346 * Parse an @supports declaration condition, e.&nbsp;g. a single (key:value) or (key) statement.
347 *
348 * The parsing rule {@link #literal()} from the main mapcss parser is reused here.
349 *
350 * @return true if the condition is fulfilled
351 */
352boolean pp_supports_declaration_condition():
353{
354 Token t;
355 String feature;
356 Object val = null;
357}
358{
359 <LPAR> pp_w() t=<IDENT> { feature = t.image; } pp_w() ( <COLON> pp_w() val=literal() )? <RPAR>
360 { return this.sheet.evalSupportsDeclCondition(feature, val); }
361}
362
363// deprecated
364void pp_media(boolean ignore):
365{
366 boolean pass = false;
367 boolean q;
368 boolean empty = true;
369}
370{
371 <PP_MEDIA> pp_w()
372 ( q=pp_media_query() { pass = pass || q; empty = false; }
373 ( <COMMA> pp_w() q=pp_media_query() { pass = pass || q; } )*
374 )?
375 <LBRACE>
376 pp_black_box((empty || pass) && !ignore)
377 <RBRACE>
378}
379
380// deprecated
381boolean pp_media_query():
382{
383 Token t;
384 String mediatype = "all";
385 boolean pass = true;
386 boolean invert = false;
387 boolean e;
388}
389{
390 ( <PP_NOT> { invert = true; } pp_w() )?
391 (
392 t=<IDENT> { mediatype = t.image.toLowerCase(Locale.ENGLISH); } pp_w()
393 ( <PP_AND> pp_w() e=pp_media_expression() { pass = pass && e; } pp_w() )*
394 |
395 e=pp_media_expression() { pass = pass && e; } pp_w()
396 ( <PP_AND> pp_w() e=pp_media_expression() { pass = pass && e; } pp_w() )*
397 )
398 {
399 if (!"all".equals(mediatype)) {
400 pass = false;
401 }
402 return invert ? (!pass) : pass;
403 }
404}
405
406/**
407 * Parse an @media expression.
408 *
409 * The parsing rule {@link #literal()} from the main mapcss parser is reused here.
410 *
411 * @return true if the condition is fulfilled
412 */
413// deprecated
414boolean pp_media_expression():
415{
416 Token t;
417 String feature;
418 Object val = null;
419}
420{
421 <LPAR> pp_w() t=<IDENT> { feature = t.image; } pp_w() ( <COLON> pp_w() val=literal() )? <RPAR>
422 { return this.sheet.evalSupportsDeclCondition(feature, val); }
423}
424
425void pp_w1():
426{
427 Token t;
428}
429{
430 t=<PP_NEWLINECHAR> { sb.append(t.image); }
431 |
432 t=<PP_WHITESPACE> { sb.append(t.image); }
433 |
434 t=<PP_COMMENT_START> { sb.append(t.image); } t=<PP_COMMENT_END> { sb.append(t.image); }
435}
436
437void pp_w():
438{
439}
440{
441 ( pp_w1() )*
442}
443
444/*************
445 *
446 * Parser definition for the main MapCSS parser:
447 *
448 * <pre>
449 *
450 * rule
451 * _______________________|______________________________
452 * | |
453 * selector declaration
454 * _________|___________________ _________|____________
455 * | | | |
456 *
457 * way|z11-12[highway=residential] { color: red; width: 3 }
458 *
459 * |_____||___________________| |_________|
460 * | | |
461 * zoom condition instruction
462 *
463 * more general:
464 *
465 * way|z13-[a=b][c=d]::subpart, way|z-3[u=v]:closed::subpart2 { p1 : val; p2 : val; }
466 *
467 * 'val' can be a literal, or an expression like "prop(width, default) + 0.8".
468 *
469 * </pre>
470 */
471
472int uint() :
473{
474 Token i;
475}
476{
477 i=<UINT> { return Integer.parseInt(i.image); }
478}
479
480int int_() :
481{
482 int i;
483}
484{
485 <MINUS> i=uint() { return -i; } | i=uint() { return i; }
486}
487
488float ufloat() :
489{
490 Token f;
491}
492{
493 ( f=<UFLOAT> | f=<UINT> )
494 { return Float.parseFloat(f.image); }
495}
496
497float float_() :
498{
499 float f;
500}
501{
502 <MINUS> f=ufloat() { return -f; } | f=ufloat() { return f; }
503}
504
505String string() :
506{
507 Token t;
508}
509{
510 t=<STRING>
511 { return t.image.substring(1, t.image.length() - 1).replace("\\\"", "\"").replace("\\\\", "\\"); }
512}
513
514String ident():
515{
516 Token t;
517 String s;
518}
519{
520 ( t=<IDENT> | t=<SET> ) { return t.image; }
521}
522
523String string_or_ident() :
524{
525 Token t;
526 String s;
527}
528{
529 ( s=ident() | s=string() ) { return s; }
530}
531
532String regex() :
533{
534 Token t;
535}
536{
537 t=<REGEX>
538 { return t.image.substring(1, t.image.length() - 1); }
539}
540
541/**
542 * white-space
543 */
544void s() :
545{
546}
547{
548 ( <S> )?
549}
550
551/**
552 * mix of white-space and comments
553 */
554void w() :
555{
556}
557{
558 ( <S> | <COMMENT_START> <COMMENT_END> )*
559}
560
561/**
562 * comma delimited list of floats (at least 2, all &gt;= 0)
563 */
564List<Float> float_array() :
565{
566 float f;
567 List<Float> fs = new ArrayList<Float>();
568}
569{
570 f=ufloat() { fs.add(f); }
571 (
572 <COMMA> s()
573 f=ufloat() { fs.add(f); }
574 )+
575 {
576 return fs;
577 }
578}
579
580/**
581 * entry point for the main parser
582 */
583void sheet(MapCSSStyleSource sheet):
584{
585}
586{
587 { this.sheet = sheet; }
588 w()
589 (
590 try {
591 rule() w()
592 } catch (MapCSSException mex) {
593 Main.error(mex);
594 error_skipto(RBRACE, mex);
595 w();
596 } catch (ParseException ex) {
597 error_skipto(RBRACE, null);
598 w();
599 }
600 )*
601 <EOF>
602}
603
604void rule():
605{
606 List<Selector> selectors;
607 Declaration decl;
608}
609{
610 selectors=selectors()
611 decl=declaration()
612 {
613 for (Selector s : selectors) {
614 sheet.rules.add(new MapCSSRule(s, decl));
615 }
616 }
617}
618
619List<Selector> selectors():
620{
621 List<Selector> selectors = new ArrayList<Selector>();
622 Selector sel;
623}
624{
625 sel=child_selector() { selectors.add(sel); }
626 (
627 <COMMA> w()
628 sel=child_selector() { selectors.add(sel); }
629 )*
630 { return selectors; }
631}
632
633Selector child_selector() :
634{
635 Selector.ChildOrParentSelectorType type = null;
636 Condition c;
637 List<Condition> conditions = new ArrayList<Condition>();
638 Selector selLeft;
639 LinkSelector selLink = null;
640 Selector selRight = null;
641}
642{
643 selLeft=selector() w()
644 (
645 (
646 (
647 (
648 <GREATER> { type = Selector.ChildOrParentSelectorType.CHILD; }
649 |
650 <LESS> { type = Selector.ChildOrParentSelectorType.PARENT; }
651 |
652 <PLUS> { type = Selector.ChildOrParentSelectorType.SIBLING; }
653 )
654 ( ( c=condition(Context.LINK) | c=class_or_pseudoclass(Context.LINK) ) { conditions.add(c); } )*
655 |
656 <ELEMENT_OF> { type = Selector.ChildOrParentSelectorType.ELEMENT_OF; }
657 |
658 <CROSSING> { type = Selector.ChildOrParentSelectorType.CROSSING; }
659 )
660 w()
661 |
662 { /* <GREATER> is optional for child selector */ type = Selector.ChildOrParentSelectorType.CHILD; }
663 )
664 { selLink = new LinkSelector(conditions); }
665 selRight=selector() w()
666 )?
667 { return selRight != null ? new ChildOrParentSelector(selLeft, selLink, selRight, type) : selLeft; }
668}
669
670Selector selector() :
671{
672 Token base;
673 Condition c;
674 Pair<Integer, Integer> r = null;
675 List<Condition> conditions = new ArrayList<Condition>();
676 Subpart sub = null;
677}
678{
679 ( base=<IDENT> | base=<STAR> )
680 ( r=zoom() )?
681 ( ( c=condition(Context.PRIMITIVE) | c=class_or_pseudoclass(Context.PRIMITIVE) ) { conditions.add(c); } )*
682 ( sub=subpart() )?
683 { return new GeneralSelector(base.image, r, conditions, sub); }
684}
685
686Pair<Integer, Integer> zoom() :
687{
688 Integer min = 0;
689 Integer max = Integer.MAX_VALUE;
690}
691{
692 <PIPE_Z>
693 (
694 <MINUS> max=uint()
695 |
696 LOOKAHEAD(2)
697 min=uint() <MINUS> ( max=uint() )?
698 |
699 min=uint() { max = min; }
700 )
701 { return new Pair<Integer, Integer>(min, max); }
702}
703
704Condition condition(Context context) :
705{
706 Condition c;
707 Expression e;
708}
709{
710 <LSQUARE> s()
711 (
712 LOOKAHEAD( simple_key_condition(context) s() <RSQUARE> )
713 c=simple_key_condition(context) s() <RSQUARE> { return c; }
714 |
715 LOOKAHEAD( simple_key_value_condition(context) s() <RSQUARE> )
716 c=simple_key_value_condition(context) s() <RSQUARE> { return c; }
717 |
718 e=expression() <RSQUARE> { return Condition.createExpressionCondition(e, context); }
719 )
720}
721
722String tag_key() :
723{
724 String s, s2;
725 Token t;
726}
727{
728 s=string() { return s; }
729 |
730 s=ident() ( <COLON> s2=ident() { s += ':' + s2; } )* { return s; }
731}
732
733Condition simple_key_condition(Context context) :
734{
735 boolean not = false;
736 Condition.KeyMatchType matchType = null;;
737 String key;
738}
739{
740 ( <EXCLAMATION> { not = true; } )?
741 (
742 { matchType = Condition.KeyMatchType.REGEX; } key = regex()
743 |
744 key = tag_key()
745 )
746 ( LOOKAHEAD(2) <QUESTION> <EXCLAMATION> { matchType = Condition.KeyMatchType.FALSE; } )?
747 ( <QUESTION> { matchType = Condition.KeyMatchType.TRUE; } )?
748 { return Condition.createKeyCondition(key, not, matchType, context); }
749}
750
751Condition simple_key_value_condition(Context context) :
752{
753 String key;
754 String val;
755 float f;
756 int i;
757 Condition.KeyMatchType matchType = null;;
758 Condition.Op op;
759 boolean considerValAsKey = false;
760}
761{
762 (
763 key = regex() s() { matchType = Condition.KeyMatchType.REGEX; }
764 |
765 key=tag_key() s()
766 )
767 (
768 LOOKAHEAD(3)
769 (
770 <EQUAL> <TILDE> { op=Condition.Op.REGEX; }
771 |
772 <EXCLAMATION> <TILDE> { op=Condition.Op.NREGEX; }
773 )
774 s()
775 ( <STAR> { considerValAsKey=true; } )?
776 val=regex()
777 |
778 (
779 <EXCLAMATION> <EQUAL> { op=Condition.Op.NEQ; }
780 |
781 <EQUAL> { op=Condition.Op.EQ; }
782 |
783 <TILDE> <EQUAL> { op=Condition.Op.ONE_OF; }
784 |
785 <CARET> <EQUAL> { op=Condition.Op.BEGINS_WITH; }
786 |
787 <DOLLAR> <EQUAL> { op=Condition.Op.ENDS_WITH; }
788 |
789 <STAR> <EQUAL> { op=Condition.Op.CONTAINS; }
790 )
791 s()
792 ( <STAR> { considerValAsKey=true; } )?
793 (
794 LOOKAHEAD(2)
795 i=int_() { val=Integer.toString(i); }
796 |
797 f=float_() { val=Float.toString(f); }
798 |
799 val=string_or_ident()
800 )
801 |
802 (
803 <GREATER_EQUAL> { op=Condition.Op.GREATER_OR_EQUAL; }
804 |
805 <GREATER> { op=Condition.Op.GREATER; }
806 |
807 <LESS_EQUAL> { op=Condition.Op.LESS_OR_EQUAL; }
808 |
809 <LESS> { op=Condition.Op.LESS; }
810 )
811 s()
812 f=float_() { val=Float.toString(f); }
813 )
814 { return Condition.KeyMatchType.REGEX == matchType
815 ? Condition.createRegexpKeyRegexpValueCondition(key, val, op)
816 : Condition.createKeyValueCondition(key, val, op, context, considerValAsKey); }
817}
818
819Condition class_or_pseudoclass(Context context) :
820{
821 String s;
822 boolean not = false;
823 boolean pseudo;
824}
825{
826 ( <EXCLAMATION> { not = true; } )?
827 (
828 <FULLSTOP> { pseudo = false; }
829 |
830 <COLON> { pseudo = true; }
831 )
832 s=ident()
833 { return pseudo
834 ? Condition.createPseudoClassCondition(s, not, context)
835 : Condition.createClassCondition(s, not, context); }
836}
837
838Subpart subpart() :
839{
840 String s;
841 Expression e;
842}
843{
844 <DCOLON>
845 (
846 s=ident() { return new Subpart.StringSubpart(s); }
847 |
848 <STAR> { return new Subpart.StringSubpart("*"); }
849 |
850 <LPAR> e=expression() <RPAR> { return new Subpart.ExpressionSubpart(e); }
851 )
852}
853
854Declaration declaration() :
855{
856 List<Instruction> ins = new ArrayList<Instruction>();
857 Instruction i;
858 Token key;
859 Object val = null;
860}
861{
862 <LBRACE> w()
863 (
864 (
865 <SET> w()
866 (<FULLSTOP>)? // specification allows "set .class" to set "class". we also support "set class"
867 key=<IDENT> w()
868 ( <EQUAL> val=expression() )?
869 { ins.add(new Instruction.AssignmentInstruction(key.image, val == null ? true : val, true)); }
870 ( <RBRACE> { return new Declaration(ins, declarationCounter++); } | <SEMICOLON> w() )
871 )
872 |
873 key=<IDENT> w() <COLON> w()
874 (
875 LOOKAHEAD( float_array() w() ( <SEMICOLON> | <RBRACE> ) )
876 val=float_array()
877 { ins.add(new Instruction.AssignmentInstruction(key.image, val, false)); }
878 w()
879 ( <RBRACE> { return new Declaration(ins, declarationCounter++); } | <SEMICOLON> w() )
880 |
881 LOOKAHEAD( expression() ( <SEMICOLON> | <RBRACE> ) )
882 val=expression()
883 { ins.add(new Instruction.AssignmentInstruction(key.image, val, false)); }
884 ( <RBRACE> { return new Declaration(ins, declarationCounter++); } | <SEMICOLON> w() )
885 |
886 val=readRaw() w() { ins.add(new Instruction.AssignmentInstruction(key.image, val, false)); }
887 )
888 )*
889 <RBRACE>
890 { return new Declaration(ins, declarationCounter++); }
891}
892
893/**
894 * General expression.
895 * Separate production rule for each level of operator precedence (recursive descent).
896 */
897Expression expression() :
898{
899 Expression e;
900}
901{
902 e=conditional_expression()
903 {
904 return e;
905 }
906}
907
908Expression conditional_expression() :
909{
910 Expression e, e1, e2;
911 String op = null;
912}
913{
914 e=or_expression()
915 (
916 <QUESTION> w()
917 e1=conditional_expression()
918 <COLON> w()
919 e2=conditional_expression()
920 {
921 e = ExpressionFactory.createFunctionExpression("cond", Arrays.asList(e, e1, e2));
922 }
923 )?
924 {
925 return e;
926 }
927}
928
929Expression or_expression() :
930{
931 Expression e, e2;
932 String op = null;
933}
934{
935 e=and_expression()
936 (
937 <PIPE> <PIPE> w()
938 e2=and_expression()
939 {
940 e = ExpressionFactory.createFunctionExpression("or", Arrays.asList(e, e2));
941 }
942 )*
943 {
944 return e;
945 }
946}
947
948Expression and_expression() :
949{
950 Expression e, e2;
951 String op = null;
952}
953{
954 e=relational_expression()
955 (
956 <AMPERSAND> <AMPERSAND> w()
957 e2=relational_expression()
958 {
959 e = ExpressionFactory.createFunctionExpression("and", Arrays.asList(e, e2));
960 }
961 )*
962 {
963 return e;
964 }
965}
966
967Expression relational_expression() :
968{
969 Expression e, e2;
970 String op = null;
971}
972{
973 e=additive_expression()
974 (
975 (
976 <GREATER_EQUAL> { op = "greater_equal"; }
977 |
978 <LESS_EQUAL> { op = "less_equal"; }
979 |
980 <GREATER> { op = "greater"; }
981 |
982 <LESS> { op = "less"; }
983 |
984 <EQUAL> ( <EQUAL> )? { op = "equal"; }
985 |
986 <EXCLAMATION> <EQUAL> { op = "not_equal"; }
987 ) w()
988 e2=additive_expression()
989 {
990 e = ExpressionFactory.createFunctionExpression(op, Arrays.asList(e, e2));
991 }
992 )?
993 {
994 return e;
995 }
996}
997
998Expression additive_expression() :
999{
1000 Expression e, e2;
1001 String op = null;
1002}
1003{
1004 e=multiplicative_expression()
1005 (
1006 ( <PLUS> { op = "plus"; } | <MINUS> { op = "minus"; } ) w()
1007 e2=multiplicative_expression()
1008 {
1009 e = ExpressionFactory.createFunctionExpression(op, Arrays.asList(e, e2));
1010 }
1011 )*
1012 {
1013 return e;
1014 }
1015}
1016
1017Expression multiplicative_expression() :
1018{
1019 Expression e, e2;
1020 String op = null;
1021}
1022{
1023 e=unary_expression()
1024 (
1025 ( <STAR> { op = "times"; } | <SLASH> { op = "divided_by"; } ) w()
1026 e2=unary_expression()
1027 {
1028 e = ExpressionFactory.createFunctionExpression(op, Arrays.asList(e, e2));
1029 }
1030 )*
1031 {
1032 return e;
1033 }
1034}
1035
1036Expression unary_expression() :
1037{
1038 Expression e;
1039 String op = null;
1040}
1041{
1042 (
1043 <MINUS> { op = "minus"; } w()
1044 |
1045 <EXCLAMATION> { op = "not"; } w()
1046 )?
1047 e=primary() w()
1048 {
1049 if (op == null)
1050 return e;
1051 return ExpressionFactory.createFunctionExpression(op, Collections.singletonList(e));
1052 }
1053}
1054
1055Expression primary() :
1056{
1057 Expression nested;
1058 Expression fn;
1059 Object lit;
1060}
1061{
1062 LOOKAHEAD(3) // both function and identifier start with an identifier (+ optional whitespace)
1063 fn=function() { return fn; }
1064 |
1065 lit=literal()
1066 {
1067 if (lit == null)
1068 return NullExpression.INSTANCE;
1069 return new LiteralExpression(lit);
1070 }
1071 |
1072 <LPAR> w() nested=expression() <RPAR> { return nested; }
1073}
1074
1075Expression function() :
1076{
1077 Expression arg;
1078 String name;
1079 List<Expression> args = new ArrayList<Expression>();
1080}
1081{
1082 name=ident() w()
1083 <LPAR> w()
1084 (
1085 arg=expression() { args.add(arg); }
1086 ( <COMMA> w() arg=expression() { args.add(arg); } )*
1087 )?
1088 <RPAR>
1089 { return ExpressionFactory.createFunctionExpression(name, args); }
1090}
1091
1092Object literal() :
1093{
1094 String val, pref;
1095 Token t;
1096 Float f;
1097}
1098{
1099 LOOKAHEAD(2)
1100 pref=ident() t=<HEXCOLOR>
1101 { return Main.pref.getColor("mappaint." + (sheet == null ? "MapCSS" : sheet.title) + "." + pref, ColorHelper.html2color(t.image)); }
1102 |
1103 t=<IDENT> { return new Keyword(t.image); }
1104 |
1105 val=string() { return val; }
1106 |
1107 <PLUS> f=ufloat() { return new Instruction.RelativeFloat(f); }
1108 |
1109 LOOKAHEAD(2)
1110 f=ufloat_unit() { return f; }
1111 |
1112 f=ufloat() { return f; }
1113 |
1114 t=<HEXCOLOR> { return ColorHelper.html2color(t.image); }
1115}
1116
1117/**
1118 * Number followed by a unit.
1119 *
1120 * Returns angles in radians and lengths in pixels.
1121 */
1122Float ufloat_unit() :
1123{
1124 float f;
1125 String u;
1126}
1127{
1128 f=ufloat() ( u=ident() | <DEG> { u = "°"; } )
1129 {
1130 Double m = unit_factor(u);
1131 if (m == null)
1132 return null;
1133 return (float) (f * m);
1134 }
1135}
1136
1137JAVACODE
1138private Double unit_factor(String unit) {
1139 switch (unit) {
1140 case "deg":
1141 case "°": return Math.PI / 180;
1142 case "rad": return 1.;
1143 case "grad": return Math.PI / 200;
1144 case "turn": return 2 * Math.PI;
1145 case "px": return 1.;
1146 case "cm": return 96/2.54;
1147 case "mm": return 9.6/2.54;
1148 case "in": return 96.;
1149 case "q": return 2.4/2.54;
1150 case "pc": return 16.;
1151 case "pt": return 96./72;
1152 default: return null;
1153 }
1154}
1155
1156JAVACODE
1157void error_skipto(int kind, MapCSSException me) {
1158 if (token.kind == EOF)
1159 throw new ParseException("Reached end of file while parsing");
1160
1161 Exception e = null;
1162 ParseException pe = generateParseException();
1163
1164 if (me != null) {
1165 final Token token = Utils.firstNonNull(pe.currentToken.next, pe.currentToken);
1166 me.setLine(token.beginLine);
1167 me.setColumn(token.beginColumn);
1168 e = me;
1169 } else {
1170 e = new ParseException(pe.getMessage()); // prevent memory leak
1171 }
1172
1173 Main.error("Skipping to the next rule, because of an error:");
1174 Main.error(e);
1175 if (sheet != null) {
1176 sheet.logError(e);
1177 }
1178 Token t;
1179 do {
1180 t = getNextToken();
1181 } while (t.kind != kind && t.kind != EOF);
1182 if (t.kind == EOF)
1183 throw new ParseException("Reached end of file while parsing");
1184}
1185
1186JAVACODE
1187/**
1188 * read everything to the next semicolon
1189 */
1190String readRaw() {
1191 Token t;
1192 StringBuilder s = new StringBuilder();
1193 while (true) {
1194 t = getNextToken();
1195 if ((t.kind == S || t.kind == STRING || t.kind == UNEXPECTED_CHAR) &&
1196 t.image.contains("\n")) {
1197 ParseException e = new ParseException(String.format("Warning: end of line while reading an unquoted string at line %s column %s.", t.beginLine, t.beginColumn));
1198 Main.error(e);
1199 if (sheet != null) {
1200 sheet.logError(e);
1201 }
1202 }
1203 if (t.kind == SEMICOLON || t.kind == EOF)
1204 break;
1205 s.append(t.image);
1206 }
1207 if (t.kind == EOF)
1208 throw new ParseException("Reached end of file while parsing");
1209 return s.toString();
1210}
1211
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