source: josm/trunk/src/org/openstreetmap/josm/gui/mappaint/mapcss/MapCSSParser.jj@ 17318

Last change on this file since 17318 was 17208, checked in by GerdP, 5 years ago

see #19875: Inactive Map Paint styles cause bad performance

  • remove support for deprecated @media in mapcss parser
  • Property svn:eol-style set to native
File size: 29.9 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;
16
17import org.openstreetmap.josm.data.preferences.NamedColorProperty;
18import org.openstreetmap.josm.gui.mappaint.Keyword;
19import org.openstreetmap.josm.gui.mappaint.Range;
20import org.openstreetmap.josm.gui.mappaint.mapcss.Condition;
21import org.openstreetmap.josm.gui.mappaint.mapcss.Condition.Context;
22import org.openstreetmap.josm.gui.mappaint.mapcss.ConditionFactory;
23import org.openstreetmap.josm.gui.mappaint.mapcss.ConditionFactory.KeyMatchType;
24import org.openstreetmap.josm.gui.mappaint.mapcss.ConditionFactory.Op;
25import org.openstreetmap.josm.gui.mappaint.mapcss.Declaration;
26import org.openstreetmap.josm.gui.mappaint.mapcss.Expression;
27import org.openstreetmap.josm.gui.mappaint.mapcss.ExpressionFactory;
28import org.openstreetmap.josm.gui.mappaint.mapcss.ExpressionFactory.NullExpression;
29import org.openstreetmap.josm.gui.mappaint.mapcss.Instruction;
30import org.openstreetmap.josm.gui.mappaint.mapcss.LiteralExpression;
31import org.openstreetmap.josm.gui.mappaint.mapcss.MapCSSException;
32import org.openstreetmap.josm.gui.mappaint.mapcss.MapCSSRule;
33import org.openstreetmap.josm.gui.mappaint.mapcss.MapCSSStyleSource;
34import org.openstreetmap.josm.gui.mappaint.mapcss.Selector;
35import org.openstreetmap.josm.gui.mappaint.mapcss.Selector.ChildOrParentSelector;
36import org.openstreetmap.josm.gui.mappaint.mapcss.Selector.GeneralSelector;
37import org.openstreetmap.josm.gui.mappaint.mapcss.Selector.LinkSelector;
38import org.openstreetmap.josm.gui.mappaint.mapcss.Subpart;
39import org.openstreetmap.josm.tools.ColorHelper;
40import org.openstreetmap.josm.tools.JosmRuntimeException;
41import org.openstreetmap.josm.tools.Logging;
42import org.openstreetmap.josm.tools.Utils;
43
44/**
45 * MapCSS parser.
46 *
47 * Contains two independent grammars:
48 * (a) the preprocessor and (b) the main mapcss parser.
49 *
50 * The preprocessor handles @supports syntax.
51 * Basically this allows to write one style for different versions of JOSM (or different editors).
52 * When the @supports condition is not fulfilled, it should simply skip over
53 * the whole section and not attempt to parse the possibly unknown
54 * grammar. It preserves whitespace and comments, in order to keep the
55 * line and column numbers in the error messages correct for the second pass.
56 *
57 */
58public class MapCSSParser {
59 MapCSSStyleSource sheet;
60 StringBuilder sb;
61 int declarationCounter;
62
63 /**
64 * Nicer way to refer to a lexical state.
65 */
66 public enum LexicalState {
67 /** the preprocessor */
68 PREPROCESSOR(0),
69 /** the main parser */
70 DEFAULT(2);
71
72 final int idx; // the integer, which javacc assigns to this state
73
74 LexicalState(int idx) {
75 if (!this.name().equals(MapCSSParserTokenManager.lexStateNames[idx])) {
76 throw new JosmRuntimeException("Wrong name for index " + idx);
77 }
78 this.idx = idx;
79 }
80 }
81
82 /**
83 * Constructor which initializes the parser with a certain lexical state.
84 * @param in input
85 * @param encoding contents encoding
86 * @param initState initial state
87 */
88 @Deprecated
89 public MapCSSParser(InputStream in, String encoding, LexicalState initState) {
90 this(createTokenManager(in, encoding, initState));
91 declarationCounter = 0;
92 }
93
94 @Deprecated
95 protected static MapCSSParserTokenManager createTokenManager(InputStream in, String encoding, LexicalState initState) {
96 SimpleCharStream scs;
97 try {
98 scs = new SimpleCharStream(in, encoding, 1, 1);
99 } catch (java.io.UnsupportedEncodingException e) {
100 throw new JosmRuntimeException(e);
101 }
102 return new MapCSSParserTokenManager(scs, initState.idx);
103 }
104
105 /**
106 * Constructor which initializes the parser with a certain lexical state.
107 * @param in input
108 * @param initState initial state
109 */
110 public MapCSSParser(Reader in, LexicalState initState) {
111 this(createTokenManager(in, initState));
112 declarationCounter = 0;
113 }
114
115 protected static MapCSSParserTokenManager createTokenManager(Reader in, LexicalState initState) {
116 final SimpleCharStream scs = new SimpleCharStream(in, 1, 1);
117 return new MapCSSParserTokenManager(scs, initState.idx);
118 }
119}
120PARSER_END(MapCSSParser)
121
122/**
123 * Token definitions
124 *
125 * Lexical states for the preprocessor: <PREPROCESSOR>, <PP_COMMENT>
126 * Lexical states for the main parser: <DEFAULT>, <COMMENT>
127 */
128
129<PREPROCESSOR>
130TOKEN:
131{
132 < PP_AND: "and" >
133| < PP_OR: "or" >
134| < PP_NOT: "not" >
135| < PP_SUPPORTS: "@supports" >
136| < PP_NEWLINECHAR: "\n" | "\r" | "\f" >
137| < PP_WHITESPACE: " " | "\t" >
138| < PP_COMMENT_START: "/*" > : PP_COMMENT
139}
140
141<PP_COMMENT>
142TOKEN:
143{
144 < PP_COMMENT_END: "*/" > : PREPROCESSOR
145}
146
147<PP_COMMENT>
148MORE:
149{
150 < ~[] >
151}
152
153<DEFAULT>
154TOKEN [IGNORE_CASE]:
155{
156 /* Special keyword in some contexts, ordinary identifier in other contexts.
157 Use the parsing rule <code>ident()</code> to refer to a general
158 identifier, including "set". */
159 < SET: "set" >
160}
161
162<DEFAULT,PREPROCESSOR>
163TOKEN:
164{
165 < IDENT: ["a"-"z","A"-"Z","_"] ( ["a"-"z","A"-"Z","_","-","0"-"9"] )* >
166| < UINT: ( ["0"-"9"] )+ >
167| < STRING: "\"" ( [" ","!","#"-"[","]"-"~","\u0080"-"\uFFFF"] | "\\\"" | "\\\\" )* "\"" >
168| < #PREDEFINED: "\\" ["d","D","s","S","w","W","b","B","A","G","Z","z"] >
169| < #REGEX_CHAR_WITHOUT_STAR: [" "-")","+"-".","0"-"[","]"-"~","\u0080"-"\uFFFF"] | "\\/" | "\\\\" | "\\[" | "\\]" | "\\+" | "\\." | "\\'" | "\\\"" | "\\(" | "\\)" | "\\{" | "\\}" | "\\?" | "\\*" | "\\^" | "\\$" | "\\|" | "\\p" |<PREDEFINED> >
170| < REGEX: "/" <REGEX_CHAR_WITHOUT_STAR> ( <REGEX_CHAR_WITHOUT_STAR> | "*" )* "/" >
171| < LBRACE: "{" >
172| < RBRACE: "}" >
173| < LPAR: "(" >
174| < RPAR: ")" >
175| < COMMA: "," >
176| < COLON: ":" >
177}
178
179<PREPROCESSOR>
180TOKEN:
181{
182 < PP_SOMETHING_ELSE : ~[] >
183}
184
185<DEFAULT>
186TOKEN:
187{
188 < UFLOAT: ( ["0"-"9"] )+ ( "." ( ["0"-"9"] )+ )? >
189| < #H: ["0"-"9","a"-"f","A"-"F"] >
190| < HEXCOLOR: "#" ( <H><H><H><H><H><H><H><H> | <H><H><H><H><H><H> | <H><H><H> ) >
191| < S: ( " " | "\t" | "\n" | "\r" | "\f" )+ >
192| < STAR: "*" >
193| < SLASH: "/" >
194| < LSQUARE: "[" >
195| < RSQUARE: "]" >
196| < GREATER_EQUAL: ">=" >
197| < LESS_EQUAL: "<=" >
198| < GREATER: ">" >
199| < LESS: "<" >
200| < EQUAL: "=" >
201| < EXCLAMATION: "!" >
202| < TILDE: "~" >
203| < DCOLON: "::" >
204| < SEMICOLON: ";" >
205| < PIPE: "|" >
206| < PIPE_Z: "|z" >
207| < PLUS: "+" >
208| < MINUS: "-" >
209| < AMPERSAND: "&" >
210| < QUESTION: "?" >
211| < DOLLAR: "$" >
212| < CARET: "^" >
213| < FULLSTOP: "." >
214| < DEG: "°" >
215| < SUBSET_OR_EQUAL: ["∈","⊆"] >
216| < NOT_SUBSET_OR_EQUAL: "⊈" >
217| < SUPERSET_OR_EQUAL: "⊇" >
218| < NOT_SUPERSET_OR_EQUAL: "⊉" >
219| < CROSSING: "⧉" >
220| < PERCENT: "%" >
221| < COMMENT_START: "/*" > : COMMENT
222| < UNEXPECTED_CHAR : ~[] > // avoid TokenMgrErrors because they are hard to recover from
223}
224
225<COMMENT>
226TOKEN:
227{
228 < COMMENT_END: "*/" > : DEFAULT
229}
230
231<COMMENT>
232SKIP:
233{
234 < ~[] >
235}
236
237
238/*
239 * Preprocessor parser definitions:
240 *
241 * <pre>
242 *
243 * {@literal @media} { ... } queries are supported, following http://www.w3.org/TR/css3-mediaqueries/#syntax
244 *
245 * media_query
246 * ___________________________|_______________________________
247 * | |
248 * {@literal @media} all and (min-josm-version: 7789) and (max-josm-version: 7790), all and (user-agent: xyz) { ... }
249 * |______________________|
250 * |
251 * media_expression
252 * </pre>
253 */
254
255
256/**
257 * root method for the preprocessor.
258 * @param sheet MapCSS style source
259 * @return result string
260 * @throws ParseException in case of parsing error
261 */
262String pp_root(MapCSSStyleSource sheet):
263{
264}
265{
266 { sb = new StringBuilder(); this.sheet = sheet; }
267 pp_black_box(true) <EOF>
268 { return sb.toString(); }
269}
270
271/**
272 * Parse any unknown grammar (black box).
273 *
274 * Only stop when "@media" is encountered and keep track of correct number of
275 * opening and closing curly brackets.
276 *
277 * @param write false if this content should be skipped (@pp_media condition is not fulfilled), true otherwise
278 * @throws ParseException in case of parsing error
279 */
280void pp_black_box(boolean write):
281{
282 Token t;
283}
284{
285 (
286 (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); }
287 |
288 pp_w1()
289 |
290 pp_supports(!write)
291 |
292 t=<LBRACE> { if (write) sb.append(t.image); } pp_black_box(write) t=<RBRACE> { if (write) sb.append(t.image); }
293 )*
294}
295
296/**
297 * Parses an @supports rule.
298 *
299 * @param ignore if the content of this rule should be ignored
300 * (because we are already inside a @supports block that didn't pass)
301 * @throws ParseException in case of parsing error
302 */
303void pp_supports(boolean ignore):
304{
305 boolean pass;
306}
307{
308 <PP_SUPPORTS> pp_w()
309 pass=pp_supports_condition()
310 <LBRACE>
311 pp_black_box(pass && !ignore)
312 <RBRACE>
313}
314
315/**
316 * Parses the condition of the @supports rule.
317 *
318 * Unlike other parsing rules, grabs trailing whitespace.
319 * @return true, if the condition is fulfilled
320 * @throws ParseException in case of parsing error
321 */
322boolean pp_supports_condition():
323{
324 boolean pass;
325 boolean q;
326}
327{
328 (
329 <PP_NOT> pp_w() q=pp_supports_condition_in_parens() { pass = !q; } pp_w()
330 |
331 LOOKAHEAD(pp_supports_condition_in_parens() pp_w() <PP_AND>)
332 pass=pp_supports_condition_in_parens() pp_w()
333 ( <PP_AND> pp_w() q=pp_supports_condition_in_parens() { pass = pass && q; } pp_w() )+
334 |
335 LOOKAHEAD(pp_supports_condition_in_parens() pp_w() <PP_OR>)
336 pass=pp_supports_condition_in_parens() pp_w()
337 ( <PP_OR> pp_w() q=pp_supports_condition_in_parens() { pass = pass || q; } pp_w() )+
338 |
339 pass=pp_supports_condition_in_parens() pp_w()
340 )
341 { return pass; }
342}
343
344/**
345 * Parses something in parenthesis inside the condition of the @supports rule.
346 *
347 * @return true, if the condition is fulfilled
348 * @throws ParseException in case of parsing error
349 */
350boolean pp_supports_condition_in_parens():
351{
352 boolean pass;
353}
354{
355 (
356 LOOKAHEAD(pp_supports_declaration_condition())
357 pass=pp_supports_declaration_condition()
358 |
359 <LPAR> pp_w() pass=pp_supports_condition() <RPAR>
360 )
361 { return pass; }
362}
363
364/**
365 * Parse an @supports declaration condition, e.&nbsp;g. a single (key:value) or (key) statement.
366 *
367 * The parsing rule {@link #literal()} from the main mapcss parser is reused here.
368 *
369 * @return true if the condition is fulfilled
370 * @throws ParseException in case of parsing error
371 */
372boolean pp_supports_declaration_condition():
373{
374 Token t;
375 String feature;
376 Object val = null;
377}
378{
379 <LPAR> pp_w() t=<IDENT> { feature = t.image; } pp_w() ( <COLON> pp_w() val=literal() )? <RPAR>
380 { return this.sheet.evalSupportsDeclCondition(feature, val); }
381}
382
383void pp_w1():
384{
385 Token t;
386}
387{
388 t=<PP_NEWLINECHAR> { sb.append(t.image); }
389 |
390 t=<PP_WHITESPACE> { sb.append(t.image); }
391 |
392 t=<PP_COMMENT_START> { sb.append(t.image); } t=<PP_COMMENT_END> { sb.append(t.image); }
393}
394
395void pp_w():
396{
397}
398{
399 ( pp_w1() )*
400}
401
402/*
403 * Parser definition for the main MapCSS parser:
404 *
405 * <pre>
406 *
407 * rule
408 * _______________________|______________________________
409 * | |
410 * selector declaration
411 * _________|___________________ _________|____________
412 * | | | |
413 *
414 * way|z11-12[highway=residential] { color: red; width: 3 }
415 *
416 * |_____||___________________| |_________|
417 * | | |
418 * zoom condition instruction
419 *
420 * more general:
421 *
422 * way|z13-[a=b][c=d]::subpart, way|z-3[u=v]:closed::subpart2 { p1 : val; p2 : val; }
423 *
424 * 'val' can be a literal, or an expression like "prop(width, default) + 0.8".
425 *
426 * </pre>
427 */
428
429int uint() :
430{
431 Token i;
432}
433{
434 i=<UINT> { return Integer.parseInt(i.image); }
435}
436
437int int_() :
438{
439 int i;
440}
441{
442 <MINUS> i=uint() { return -i; } | i=uint() { return i; }
443}
444
445float ufloat() :
446{
447 Token f;
448}
449{
450 ( f=<UFLOAT> | f=<UINT> )
451 { return Float.parseFloat(f.image); }
452}
453
454float float_() :
455{
456 float f;
457}
458{
459 <MINUS> f=ufloat() { return -f; } | f=ufloat() { return f; }
460}
461
462String string() :
463{
464 Token t;
465}
466{
467 t=<STRING>
468 { return t.image.substring(1, t.image.length() - 1).replace("\\\"", "\"").replace("\\\\", "\\"); }
469}
470
471String ident():
472{
473 Token t;
474 String s;
475}
476{
477 ( t=<IDENT> | t=<SET> ) { return t.image; }
478}
479
480String string_or_ident() :
481{
482 Token t;
483 String s;
484}
485{
486 ( s=ident() | s=string() ) { return s; }
487}
488
489String regex() :
490{
491 Token t;
492}
493{
494 t=<REGEX>
495 { return t.image.substring(1, t.image.length() - 1); }
496}
497
498/**
499 * white-space
500 * @throws ParseException in case of parsing error
501 */
502void s() :
503{
504}
505{
506 ( <S> )?
507}
508
509/**
510 * mix of white-space and comments
511 * @throws ParseException in case of parsing error
512 */
513void w() :
514{
515}
516{
517 ( <S> | <COMMENT_START> <COMMENT_END> )*
518}
519
520/**
521 * comma delimited list of floats (at least 2, all &gt;= 0)
522 * @return list of floats
523 * @throws ParseException in case of parsing error
524 */
525List<Float> float_array() :
526{
527 float f;
528 List<Float> fs = new ArrayList<Float>();
529}
530{
531 f=ufloat() { fs.add(f); }
532 (
533 <COMMA> s()
534 f=ufloat() { fs.add(f); }
535 )+
536 {
537 return fs;
538 }
539}
540
541/**
542 * entry point for the main parser
543 * @param sheet MapCSS style source
544 * @throws ParseException in case of parsing error
545 */
546void sheet(MapCSSStyleSource sheet):
547{
548}
549{
550 { this.sheet = sheet; }
551 w()
552 (
553 try {
554 rule() w()
555 } catch (MapCSSException mex) {
556 Logging.error(mex);
557 error_skipto(RBRACE, mex);
558 w();
559 } catch (ParseException ex) {
560 error_skipto(RBRACE, null);
561 w();
562 }
563 )*
564 <EOF>
565}
566
567void rule():
568{
569 List<Selector> selectors;
570 Declaration decl;
571}
572{
573 selectors=selectors()
574 decl=declaration()
575 {
576 sheet.rules.add(new MapCSSRule(selectors, decl));
577 }
578}
579
580/** Read selectors, make sure that we read all tokens See #17746 */
581List<Selector> selectors_for_search():
582{
583 List<Selector> selectors;
584}
585{
586 selectors=selectors() <EOF>
587 { return selectors; }
588}
589
590List<Selector> selectors():
591{
592 List<Selector> selectors = new ArrayList<Selector>();
593 Selector sel;
594}
595{
596 sel=child_selector() { selectors.add(sel); }
597 (
598 <COMMA> w()
599 sel=child_selector() { selectors.add(sel); }
600 )*
601 { return selectors; }
602}
603
604Selector child_selector() :
605{
606 Selector.ChildOrParentSelectorType type = null;
607 Condition c;
608 List<Condition> conditions = new ArrayList<Condition>();
609 Selector selLeft;
610 LinkSelector selLink = null;
611 Selector selRight = null;
612}
613{
614 selLeft=selector() w()
615 (
616 (
617 (
618 (
619 <GREATER> { type = Selector.ChildOrParentSelectorType.CHILD; }
620 |
621 <LESS> { type = Selector.ChildOrParentSelectorType.PARENT; }
622 |
623 <PLUS> { type = Selector.ChildOrParentSelectorType.SIBLING; }
624 )
625 ( ( c=condition(Context.LINK) | c=class_or_pseudoclass(Context.LINK) ) { if (c!= null) conditions.add(c); } )*
626 |
627 <SUBSET_OR_EQUAL> { type = Selector.ChildOrParentSelectorType.SUBSET_OR_EQUAL; }
628 |
629 <NOT_SUBSET_OR_EQUAL> { type = Selector.ChildOrParentSelectorType.NOT_SUBSET_OR_EQUAL; }
630 |
631 <SUPERSET_OR_EQUAL> { type = Selector.ChildOrParentSelectorType.SUPERSET_OR_EQUAL; }
632 |
633 <NOT_SUPERSET_OR_EQUAL> { type = Selector.ChildOrParentSelectorType.NOT_SUPERSET_OR_EQUAL; }
634 |
635 <CROSSING> { type = Selector.ChildOrParentSelectorType.CROSSING; }
636 )
637 w()
638 |
639 { /* <GREATER> is optional for child selector */ type = Selector.ChildOrParentSelectorType.CHILD; }
640 )
641 { selLink = new LinkSelector(conditions); }
642 selRight=selector() w()
643 )?
644 { return selRight != null ? new ChildOrParentSelector(selLeft, selLink, selRight, type) : selLeft; }
645}
646
647Selector selector() :
648{
649 Token base;
650 Condition c;
651 Range r = Range.ZERO_TO_INFINITY;
652 List<Condition> conditions = new ArrayList<Condition>();
653 Subpart sub = null;
654}
655{
656 ( base=<IDENT> | base=<STAR> )
657 ( r=zoom() )?
658 ( ( c=condition(Context.PRIMITIVE) | c=class_or_pseudoclass(Context.PRIMITIVE) ) { if (c!= null) conditions.add(c); } )*
659 ( sub=subpart() )?
660 { return new GeneralSelector(base.image, r, conditions, sub); }
661}
662
663Range zoom() :
664{
665 Integer min = 0;
666 Integer max = Integer.MAX_VALUE;
667}
668{
669 <PIPE_Z>
670 (
671 <MINUS> max=uint()
672 |
673 LOOKAHEAD(2)
674 min=uint() <MINUS> ( max=uint() )?
675 |
676 min=uint() { max = min; }
677 )
678 { return GeneralSelector.fromLevel(min, max); }
679}
680
681Condition condition(Context context) :
682{
683 Condition c;
684 Expression e;
685}
686{
687 <LSQUARE> s()
688 (
689 LOOKAHEAD( simple_key_condition(context) s() <RSQUARE> )
690 c=simple_key_condition(context) s() <RSQUARE> { return c; }
691 |
692 LOOKAHEAD( simple_key_value_condition(context) s() <RSQUARE> )
693 c=simple_key_value_condition(context) s() <RSQUARE> { return c; }
694 |
695 e=expression() <RSQUARE> { return ConditionFactory.createExpressionCondition(e, context); }
696 )
697}
698
699String tag_key() :
700{
701 String s, s2;
702 Token t;
703}
704{
705 s=string() { return s; }
706 |
707 s=ident() ( <COLON> s2=ident() { s += ':' + s2; } )* { return s; }
708}
709
710Condition simple_key_condition(Context context) :
711{
712 boolean not = false;
713 KeyMatchType matchType = null;;
714 String key;
715}
716{
717 ( <EXCLAMATION> { not = true; } )?
718 (
719 { matchType = KeyMatchType.REGEX; } key = regex()
720 |
721 key = tag_key()
722 )
723 ( LOOKAHEAD(2) <QUESTION> <EXCLAMATION> { matchType = KeyMatchType.FALSE; } )?
724 ( <QUESTION> { matchType = KeyMatchType.TRUE; } )?
725 { return ConditionFactory.createKeyCondition(key, not, matchType, context); }
726}
727
728Condition simple_key_value_condition(Context context) :
729{
730 String key;
731 String val;
732 float f;
733 int i;
734 KeyMatchType matchType = null;;
735 Op op;
736 boolean considerValAsKey = false;
737}
738{
739 (
740 key = regex() s() { matchType = KeyMatchType.REGEX; }
741 |
742 key=tag_key() s()
743 )
744 (
745 LOOKAHEAD(3)
746 (
747 <EQUAL> <TILDE> { op=Op.REGEX; }
748 |
749 <EXCLAMATION> <TILDE> { op=Op.NREGEX; }
750 )
751 s()
752 ( <STAR> { considerValAsKey=true; } )?
753 val=regex()
754 |
755 (
756 <EXCLAMATION> <EQUAL> { op=Op.NEQ; }
757 |
758 <EQUAL> { op=Op.EQ; }
759 |
760 <TILDE> <EQUAL> { op=Op.ONE_OF; }
761 |
762 <CARET> <EQUAL> { op=Op.BEGINS_WITH; }
763 |
764 <DOLLAR> <EQUAL> { op=Op.ENDS_WITH; }
765 |
766 <STAR> <EQUAL> { op=Op.CONTAINS; }
767 )
768 s()
769 ( <STAR> { considerValAsKey=true; } )?
770 (
771 LOOKAHEAD(2)
772 i=int_() { val=Integer.toString(i); }
773 |
774 f=float_() { val=Float.toString(f); }
775 |
776 val=string_or_ident()
777 )
778 |
779 (
780 <GREATER_EQUAL> { op=Op.GREATER_OR_EQUAL; }
781 |
782 <GREATER> { op=Op.GREATER; }
783 |
784 <LESS_EQUAL> { op=Op.LESS_OR_EQUAL; }
785 |
786 <LESS> { op=Op.LESS; }
787 )
788 s()
789 f=float_() { val=Float.toString(f); }
790 )
791 { return KeyMatchType.REGEX == matchType
792 ? ConditionFactory.createRegexpKeyRegexpValueCondition(key, val, op)
793 : ConditionFactory.createKeyValueCondition(key, val, op, context, considerValAsKey); }
794}
795
796Condition class_or_pseudoclass(Context context) :
797{
798 String s;
799 boolean not = false;
800 boolean pseudo;
801}
802{
803 ( <EXCLAMATION> { not = true; } )?
804 (
805 <FULLSTOP> { pseudo = false; }
806 |
807 <COLON> { pseudo = true; }
808 )
809 s=ident()
810 {
811 if (pseudo && sheet != null && sheet.isRemoveAreaStylePseudoClass() && s.matches("areaStyle|area-style|area_style")) {
812 Logging.warn("Removing 'areaStyle' pseudo-class. This class is only meant for validator");
813 return null;
814 } else if (pseudo) {
815 return ConditionFactory.createPseudoClassCondition(s, not, context);
816 } else {
817 return ConditionFactory.createClassCondition(s, not, context);
818 }
819 }
820}
821
822Subpart subpart() :
823{
824 String s;
825 Expression e;
826}
827{
828 <DCOLON>
829 (
830 s=ident() { return new Subpart.StringSubpart(s); }
831 |
832 <STAR> { return new Subpart.StringSubpart("*"); }
833 |
834 <LPAR> e=expression() <RPAR> { return new Subpart.ExpressionSubpart(e); }
835 )
836}
837
838Declaration declaration() :
839{
840 List<Instruction> ins = new ArrayList<Instruction>();
841 Instruction i;
842 Token key;
843 Object val = null;
844}
845{
846 <LBRACE> w()
847 (
848 (
849 <SET> w()
850 (<FULLSTOP>)? // specification allows "set .class" to set "class". we also support "set class"
851 key=<IDENT> w()
852 ( <EQUAL> val=expression() )?
853 { ins.add(new Instruction.AssignmentInstruction(key.image, val == null ? true : val, true)); }
854 ( <RBRACE> { return new Declaration(ins, declarationCounter++); } | <SEMICOLON> w() )
855 )
856 |
857 <MINUS> <IDENT> w() <COLON> w() expression() <SEMICOLON> w()
858 |
859 key=<IDENT> w() <COLON> w()
860 (
861 LOOKAHEAD( float_array() w() ( <SEMICOLON> | <RBRACE> ) )
862 val=float_array()
863 { ins.add(new Instruction.AssignmentInstruction(key.image, val, false)); }
864 w()
865 ( <RBRACE> { return new Declaration(ins, declarationCounter++); } | <SEMICOLON> w() )
866 |
867 LOOKAHEAD( expression() ( <SEMICOLON> | <RBRACE> ) )
868 val=expression()
869 { ins.add(new Instruction.AssignmentInstruction(key.image, val, false)); }
870 ( <RBRACE> { return new Declaration(ins, declarationCounter++); } | <SEMICOLON> w() )
871 |
872 val=readRaw() w() { ins.add(new Instruction.AssignmentInstruction(key.image, val, false)); }
873 )
874 )*
875 <RBRACE>
876 { return new Declaration(ins, declarationCounter++); }
877}
878
879/**
880 * General expression.
881 * Separate production rule for each level of operator precedence (recursive descent).
882 */
883Expression expression() :
884{
885 Expression e;
886}
887{
888 e=conditional_expression()
889 {
890 return e;
891 }
892}
893
894Expression conditional_expression() :
895{
896 Expression e, e1, e2;
897 String op = null;
898}
899{
900 e=or_expression()
901 (
902 <QUESTION> w()
903 e1=conditional_expression()
904 <COLON> w()
905 e2=conditional_expression()
906 {
907 e = ExpressionFactory.createFunctionExpression("cond", Arrays.asList(e, e1, e2));
908 }
909 )?
910 {
911 return e;
912 }
913}
914
915Expression or_expression() :
916{
917 Expression e, e2;
918 String op = null;
919}
920{
921 e=and_expression()
922 (
923 <PIPE> <PIPE> w()
924 e2=and_expression()
925 {
926 e = ExpressionFactory.createFunctionExpression("or", Arrays.asList(e, e2));
927 }
928 )*
929 {
930 return e;
931 }
932}
933
934Expression and_expression() :
935{
936 Expression e, e2;
937 String op = null;
938}
939{
940 e=relational_expression()
941 (
942 <AMPERSAND> <AMPERSAND> w()
943 e2=relational_expression()
944 {
945 e = ExpressionFactory.createFunctionExpression("and", Arrays.asList(e, e2));
946 }
947 )*
948 {
949 return e;
950 }
951}
952
953Expression relational_expression() :
954{
955 Expression e, e2;
956 String op = null;
957}
958{
959 e=additive_expression()
960 (
961 (
962 <GREATER_EQUAL> { op = "greater_equal"; }
963 |
964 <LESS_EQUAL> { op = "less_equal"; }
965 |
966 <GREATER> { op = "greater"; }
967 |
968 <LESS> { op = "less"; }
969 |
970 <EQUAL> ( <EQUAL> )? { op = "equal"; }
971 |
972 <EXCLAMATION> <EQUAL> { op = "not_equal"; }
973 ) w()
974 e2=additive_expression()
975 {
976 e = ExpressionFactory.createFunctionExpression(op, Arrays.asList(e, e2));
977 }
978 )?
979 {
980 return e;
981 }
982}
983
984Expression additive_expression() :
985{
986 Expression e, e2;
987 String op = null;
988}
989{
990 e=multiplicative_expression()
991 (
992 ( <PLUS> { op = "plus"; } | <MINUS> { op = "minus"; } ) w()
993 e2=multiplicative_expression()
994 {
995 e = ExpressionFactory.createFunctionExpression(op, Arrays.asList(e, e2));
996 }
997 )*
998 {
999 return e;
1000 }
1001}
1002
1003Expression multiplicative_expression() :
1004{
1005 Expression e, e2;
1006 String op = null;
1007}
1008{
1009 e=unary_expression()
1010 (
1011 ( <STAR> { op = "times"; } | <SLASH> { op = "divided_by"; } ) w()
1012 e2=unary_expression()
1013 {
1014 e = ExpressionFactory.createFunctionExpression(op, Arrays.asList(e, e2));
1015 }
1016 )*
1017 {
1018 return e;
1019 }
1020}
1021
1022Expression unary_expression() :
1023{
1024 Expression e;
1025 String op = null;
1026}
1027{
1028 (
1029 <MINUS> { op = "minus"; } w()
1030 |
1031 <EXCLAMATION> { op = "not"; } w()
1032 )?
1033 e=primary() w()
1034 {
1035 if (op == null)
1036 return e;
1037 return ExpressionFactory.createFunctionExpression(op, Collections.singletonList(e));
1038 }
1039}
1040
1041Expression primary() :
1042{
1043 Expression nested;
1044 Expression fn;
1045 Object lit;
1046}
1047{
1048 LOOKAHEAD(3) // both function and identifier start with an identifier (+ optional whitespace)
1049 fn=function() { return fn; }
1050 |
1051 lit=literal()
1052 {
1053 if (lit == null)
1054 return NullExpression.INSTANCE;
1055 return new LiteralExpression(lit);
1056 }
1057 |
1058 <LPAR> w() nested=expression() <RPAR> { return nested; }
1059}
1060
1061Expression function() :
1062{
1063 Expression arg;
1064 String name;
1065 List<Expression> args = new ArrayList<Expression>();
1066}
1067{
1068 name=ident() w()
1069 <LPAR> w()
1070 (
1071 arg=expression() { args.add(arg); }
1072 ( <COMMA> w() arg=expression() { args.add(arg); } )*
1073 )?
1074 <RPAR>
1075 { return ExpressionFactory.createFunctionExpression(name, args); }
1076}
1077
1078Object literal() :
1079{
1080 String val, pref;
1081 Token t;
1082 Float f;
1083}
1084{
1085 LOOKAHEAD(2)
1086 pref=ident() t=<HEXCOLOR>
1087 {
1088 return new NamedColorProperty(
1089 NamedColorProperty.COLOR_CATEGORY_MAPPAINT,
1090 sheet == null ? "MapCSS" : sheet.title, pref,
1091 ColorHelper.html2color(t.image)).get();
1092 }
1093 |
1094 t=<IDENT> { return new Keyword(t.image); }
1095 |
1096 val=string() { return val; }
1097 |
1098 <PLUS> f=ufloat() { return new Instruction.RelativeFloat(f); }
1099 |
1100 LOOKAHEAD(2)
1101 f=ufloat_unit() { return f; }
1102 |
1103 f=ufloat() { return f; }
1104 |
1105 t=<HEXCOLOR> { return ColorHelper.html2color(t.image); }
1106}
1107
1108/**
1109 * Number followed by a unit.
1110 *
1111 * Returns angles in radians and lengths in pixels.
1112 */
1113Float ufloat_unit() :
1114{
1115 float f;
1116 String u;
1117}
1118{
1119 f=ufloat() ( u=ident() | <DEG> { u = "°"; } | <PERCENT> { u = "%"; } )
1120 {
1121 Double m = unit_factor(u);
1122 if (m == null)
1123 return null;
1124 return (float) (f * m);
1125 }
1126}
1127
1128JAVACODE
1129private Double unit_factor(String unit) {
1130 switch (unit) {
1131 case "deg":
1132 case "°": return Math.PI / 180;
1133 case "rad": return 1.;
1134 case "grad": return Math.PI / 200;
1135 case "turn": return 2 * Math.PI;
1136 case "%": return 0.01;
1137 case "px": return 1.;
1138 case "cm": return 96/2.54;
1139 case "mm": return 9.6/2.54;
1140 case "in": return 96.;
1141 case "q": return 2.4/2.54;
1142 case "pc": return 16.;
1143 case "pt": return 96./72;
1144 default: return null;
1145 }
1146}
1147
1148JAVACODE
1149void error_skipto(int kind, MapCSSException me) {
1150 if (token.kind == EOF)
1151 throw new ParseException("Reached end of file while parsing");
1152
1153 Exception e = null;
1154 ParseException pe = generateParseException();
1155
1156 if (me != null) {
1157 final Token token = Utils.firstNonNull(pe.currentToken.next, pe.currentToken);
1158 me.setLine(token.beginLine);
1159 me.setColumn(token.beginColumn);
1160 e = me;
1161 } else {
1162 e = new ParseException(pe.getMessage()); // prevent memory leak
1163 }
1164
1165 Logging.error("Skipping to the next rule, because of an error:");
1166 Logging.error(e);
1167 if (sheet != null) {
1168 sheet.logError(e);
1169 }
1170 Token t;
1171 do {
1172 t = getNextToken();
1173 } while (t.kind != kind && t.kind != EOF);
1174 if (t.kind == EOF)
1175 throw new ParseException("Reached end of file while parsing");
1176}
1177
1178JAVACODE
1179/**
1180 * read everything to the next semicolon
1181 */
1182String readRaw() {
1183 Token t;
1184 StringBuilder s = new StringBuilder();
1185 while (true) {
1186 t = getNextToken();
1187 if ((t.kind == S || t.kind == STRING || t.kind == UNEXPECTED_CHAR) &&
1188 t.image.contains("\n")) {
1189 ParseException e = new ParseException(String.format("Warning: end of line while reading an unquoted string at line %s column %s.", t.beginLine, t.beginColumn));
1190 Logging.error(e);
1191 if (sheet != null) {
1192 sheet.logError(e);
1193 }
1194 }
1195 if (t.kind == SEMICOLON || t.kind == EOF)
1196 break;
1197 s.append(t.image);
1198 }
1199 if (t.kind == EOF)
1200 throw new ParseException("Reached end of file while parsing");
1201 return s.toString();
1202}
1203
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