source: josm/trunk/src/org/openstreetmap/josm/gui/mappaint/mapcss/MapCSSParser.jj@ 19259

Last change on this file since 19259 was 18801, checked in by taylor.smock, 2 years ago

Fix #22832: Code cleanup and some simplification, documentation fixes (patch by gaben)

There should not be any functional changes in this patch; it is intended to do
the following:

  • Simplify and cleanup code (example: Arrays.asList(item) -> Collections.singletonList(item))
  • Fix typos in documentation (which also corrects the documentation to match what actually happens, in some cases)
  • Property svn:eol-style set to native
File size: 30.2 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.PlaceholderExpression;
35import org.openstreetmap.josm.gui.mappaint.mapcss.Selector;
36import org.openstreetmap.josm.gui.mappaint.mapcss.Selector.ChildOrParentSelector;
37import org.openstreetmap.josm.gui.mappaint.mapcss.Selector.GeneralSelector;
38import org.openstreetmap.josm.gui.mappaint.mapcss.Selector.LinkSelector;
39import org.openstreetmap.josm.gui.mappaint.mapcss.Subpart;
40import org.openstreetmap.josm.tools.ColorHelper;
41import org.openstreetmap.josm.tools.JosmRuntimeException;
42import org.openstreetmap.josm.tools.Logging;
43import org.openstreetmap.josm.tools.Utils;
44
45/**
46 * MapCSS parser.
47 *
48 * Contains two independent grammars:
49 * (a) the preprocessor and (b) the main mapcss parser.
50 *
51 * The preprocessor handles @supports syntax.
52 * Basically this allows to write one style for different versions of JOSM (or different editors).
53 * When the @supports condition is not fulfilled, it should simply skip over
54 * the whole section and not attempt to parse the possibly unknown
55 * grammar. It preserves whitespace and comments, in order to keep the
56 * line and column numbers in the error messages correct for the second pass.
57 *
58 */
59public class MapCSSParser {
60 MapCSSStyleSource sheet;
61 StringBuilder sb;
62 int declarationCounter;
63
64 /**
65 * Nicer way to refer to a lexical state.
66 */
67 public enum LexicalState {
68 /** the preprocessor */
69 PREPROCESSOR(0),
70 /** the main parser */
71 DEFAULT(2);
72
73 final int idx; // the integer, which javacc assigns to this state
74
75 LexicalState(int idx) {
76 if (!this.name().equals(MapCSSParserTokenManager.lexStateNames[idx])) {
77 throw new JosmRuntimeException("Wrong name for index " + idx);
78 }
79 this.idx = idx;
80 }
81 }
82
83 /**
84 * Constructor which initializes the parser with a certain lexical state.
85 * @param in input
86 * @param encoding contents encoding
87 * @param initState initial state
88 */
89 @Deprecated
90 public MapCSSParser(InputStream in, String encoding, LexicalState initState) {
91 this(createTokenManager(in, encoding, initState));
92 declarationCounter = 0;
93 }
94
95 @Deprecated
96 protected static MapCSSParserTokenManager createTokenManager(InputStream in, String encoding, LexicalState initState) {
97 SimpleCharStream scs;
98 try {
99 scs = new SimpleCharStream(in, encoding, 1, 1);
100 } catch (java.io.UnsupportedEncodingException e) {
101 throw new JosmRuntimeException(e);
102 }
103 return new MapCSSParserTokenManager(scs, initState.idx);
104 }
105
106 /**
107 * Constructor which initializes the parser with a certain lexical state.
108 * @param in input
109 * @param initState initial state
110 */
111 public MapCSSParser(Reader in, LexicalState initState) {
112 this(createTokenManager(in, initState));
113 declarationCounter = 0;
114 }
115
116 protected static MapCSSParserTokenManager createTokenManager(Reader in, LexicalState initState) {
117 final SimpleCharStream scs = new SimpleCharStream(in, 1, 1);
118 return new MapCSSParserTokenManager(scs, initState.idx);
119 }
120}
121PARSER_END(MapCSSParser)
122
123/**
124 * Token definitions
125 *
126 * Lexical states for the preprocessor: <PREPROCESSOR>, <PP_COMMENT>
127 * Lexical states for the main parser: <DEFAULT>, <COMMENT>
128 */
129
130<PREPROCESSOR>
131TOKEN:
132{
133 < PP_AND: "and" >
134| < PP_OR: "or" >
135| < PP_NOT: "not" >
136| < PP_SUPPORTS: "@supports" >
137| < PP_NEWLINECHAR: "\n" | "\r" | "\f" >
138| < PP_WHITESPACE: " " | "\t" >
139| < PP_COMMENT_START: "/*" > : PP_COMMENT
140}
141
142<PP_COMMENT>
143TOKEN:
144{
145 < PP_COMMENT_END: "*/" > : PREPROCESSOR
146}
147
148<PP_COMMENT>
149MORE:
150{
151 < ~[] >
152}
153
154<DEFAULT>
155TOKEN [IGNORE_CASE]:
156{
157 /* Special keyword in some contexts, ordinary identifier in other contexts.
158 Use the parsing rule <code>ident()</code> to refer to a general
159 identifier, including "set". */
160 < SET: "set" >
161}
162
163<DEFAULT,PREPROCESSOR>
164TOKEN:
165{
166 < IDENT: ["a"-"z","A"-"Z","_"] ( ["a"-"z","A"-"Z","_","-","0"-"9"] )* >
167| < UINT: ( ["0"-"9"] )+ >
168| < STRING: "\"" ( [" ","!","#"-"[","]"-"~","\u0080"-"\uFFFF"] | "\\\"" | "\\\\" )* "\"" >
169| < #PREDEFINED: "\\" ["d","D","s","S","w","W","b","B","A","G","Z","z"] >
170| < #REGEX_CHAR_WITHOUT_STAR: [" "-")","+"-".","0"-"[","]"-"~","\u0080"-"\uFFFF"] | "\\/" | "\\\\" | "\\[" | "\\]" | "\\+" | "\\." | "\\'" | "\\\"" | "\\(" | "\\)" | "\\{" | "\\}" | "\\?" | "\\*" | "\\^" | "\\$" | "\\|" | "\\p" |<PREDEFINED> >
171| < REGEX: "/" <REGEX_CHAR_WITHOUT_STAR> ( <REGEX_CHAR_WITHOUT_STAR> | "*" )* "/" >
172| < LBRACE: "{" >
173| < RBRACE: "}" >
174| < LPAR: "(" >
175| < RPAR: ")" >
176| < COMMA: "," >
177| < COLON: ":" >
178}
179
180<PREPROCESSOR>
181TOKEN:
182{
183 < PP_SOMETHING_ELSE : ~[] >
184}
185
186<DEFAULT>
187TOKEN:
188{
189 < UFLOAT: ( ["0"-"9"] )+ ( "." ( ["0"-"9"] )+ )? >
190| < #H: ["0"-"9","a"-"f","A"-"F"] >
191| < HEXCOLOR: "#" ( <H><H><H><H><H><H><H><H> | <H><H><H><H><H><H> | <H><H><H> ) >
192| < S: ( " " | "\t" | "\n" | "\r" | "\f" )+ >
193| < STAR: "*" >
194| < SLASH: "/" >
195| < LSQUARE: "[" >
196| < RSQUARE: "]" >
197| < GREATER_EQUAL: ">=" >
198| < LESS_EQUAL: "<=" >
199| < GREATER: ">" >
200| < LESS: "<" >
201| < EQUAL: "=" >
202| < EXCLAMATION: "!" >
203| < TILDE: "~" >
204| < DCOLON: "::" >
205| < SEMICOLON: ";" >
206| < PIPE: "|" >
207| < PIPE_Z: "|z" >
208| < PLUS: "+" >
209| < MINUS: "-" >
210| < AMPERSAND: "&" >
211| < QUESTION: "?" >
212| < DOLLAR: "$" >
213| < CARET: "^" >
214| < FULLSTOP: "." >
215| < DEG: "°" >
216| < SUBSET_OR_EQUAL: ["∈","⊆"] >
217| < NOT_SUBSET_OR_EQUAL: "⊈" >
218| < SUPERSET_OR_EQUAL: "⊇" >
219| < NOT_SUPERSET_OR_EQUAL: "⊉" >
220| < CROSSING: "⧉" >
221| < PERCENT: "%" >
222| < COMMENT_START: "/*" > : COMMENT
223| < UNEXPECTED_CHAR : ~[] > // avoid TokenMgrErrors because they are hard to recover from
224}
225
226<COMMENT>
227TOKEN:
228{
229 < COMMENT_END: "*/" > : DEFAULT
230}
231
232<COMMENT>
233SKIP:
234{
235 < ~[] >
236}
237
238
239/*
240 * Preprocessor parser definitions:
241 *
242 * <pre>
243 *
244 * {@literal @media} { ... } queries are supported, following http://www.w3.org/TR/css3-mediaqueries/#syntax
245 *
246 * media_query
247 * ___________________________|_______________________________
248 * | |
249 * {@literal @media} all and (min-josm-version: 7789) and (max-josm-version: 7790), all and (user-agent: xyz) { ... }
250 * |______________________|
251 * |
252 * media_expression
253 * </pre>
254 */
255
256
257/**
258 * root method for the preprocessor.
259 * @param sheet MapCSS style source
260 * @return result string
261 * @throws ParseException in case of parsing error
262 */
263String pp_root(MapCSSStyleSource sheet):
264{
265}
266{
267 { sb = new StringBuilder(); this.sheet = sheet; }
268 pp_black_box(true) <EOF>
269 { return sb.toString(); }
270}
271
272/**
273 * Parse any unknown grammar (black box).
274 *
275 * Only stop when "@media" is encountered and keep track of correct number of
276 * opening and closing curly brackets.
277 *
278 * @param write false if this content should be skipped (@pp_media condition is not fulfilled), true otherwise
279 * @throws ParseException in case of parsing error
280 */
281void pp_black_box(boolean write):
282{
283 Token t;
284}
285{
286 (
287 (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); }
288 |
289 pp_w1()
290 |
291 pp_supports(!write)
292 |
293 t=<LBRACE> { if (write) sb.append(t.image); } pp_black_box(write) t=<RBRACE> { if (write) sb.append(t.image); }
294 )*
295}
296
297/**
298 * Parses an @supports rule.
299 *
300 * @param ignore if the content of this rule should be ignored
301 * (because we are already inside a @supports block that didn't pass)
302 * @throws ParseException in case of parsing error
303 */
304void pp_supports(boolean ignore):
305{
306 boolean pass;
307}
308{
309 <PP_SUPPORTS> pp_w()
310 pass=pp_supports_condition()
311 <LBRACE>
312 pp_black_box(pass && !ignore)
313 <RBRACE>
314}
315
316/**
317 * Parses the condition of the @supports rule.
318 *
319 * Unlike other parsing rules, grabs trailing whitespace.
320 * @return true, if the condition is fulfilled
321 * @throws ParseException in case of parsing error
322 */
323boolean pp_supports_condition():
324{
325 boolean pass;
326 boolean q;
327}
328{
329 (
330 <PP_NOT> pp_w() q=pp_supports_condition_in_parens() { pass = !q; } pp_w()
331 |
332 LOOKAHEAD(pp_supports_condition_in_parens() pp_w() <PP_AND>)
333 pass=pp_supports_condition_in_parens() pp_w()
334 ( <PP_AND> pp_w() q=pp_supports_condition_in_parens() { pass = pass && q; } pp_w() )+
335 |
336 LOOKAHEAD(pp_supports_condition_in_parens() pp_w() <PP_OR>)
337 pass=pp_supports_condition_in_parens() pp_w()
338 ( <PP_OR> pp_w() q=pp_supports_condition_in_parens() { pass = pass || q; } pp_w() )+
339 |
340 pass=pp_supports_condition_in_parens() pp_w()
341 )
342 { return pass; }
343}
344
345/**
346 * Parses something in parenthesis inside the condition of the @supports rule.
347 *
348 * @return true, if the condition is fulfilled
349 * @throws ParseException in case of parsing error
350 */
351boolean pp_supports_condition_in_parens():
352{
353 boolean pass;
354}
355{
356 (
357 LOOKAHEAD(pp_supports_declaration_condition())
358 pass=pp_supports_declaration_condition()
359 |
360 <LPAR> pp_w() pass=pp_supports_condition() <RPAR>
361 )
362 { return pass; }
363}
364
365/**
366 * Parse an @supports declaration condition, e.&nbsp;g. a single (key:value) or (key) statement.
367 *
368 * The parsing rule {@link #literal()} from the main mapcss parser is reused here.
369 *
370 * @return true if the condition is fulfilled
371 * @throws ParseException in case of parsing error
372 */
373boolean pp_supports_declaration_condition():
374{
375 Token t;
376 String feature;
377 Object val = null;
378}
379{
380 <LPAR> pp_w() t=<IDENT> { feature = t.image; } pp_w() ( <COLON> pp_w() val=literal() )? <RPAR>
381 { return this.sheet.evalSupportsDeclCondition(feature, val); }
382}
383
384void pp_w1():
385{
386 Token t;
387}
388{
389 t=<PP_NEWLINECHAR> { sb.append(t.image); }
390 |
391 t=<PP_WHITESPACE> { sb.append(t.image); }
392 |
393 t=<PP_COMMENT_START> { sb.append(t.image); } t=<PP_COMMENT_END> { sb.append(t.image); }
394}
395
396void pp_w():
397{
398}
399{
400 ( pp_w1() )*
401}
402
403/*
404 * Parser definition for the main MapCSS parser:
405 *
406 * <pre>
407 *
408 * rule
409 * _______________________|______________________________
410 * | |
411 * selector declaration
412 * _________|___________________ _________|____________
413 * | | | |
414 *
415 * way|z11-12[highway=residential] { color: red; width: 3 }
416 *
417 * |_____||___________________| |_________|
418 * | | |
419 * zoom condition instruction
420 *
421 * more general:
422 *
423 * way|z13-[a=b][c=d]::subpart, way|z-3[u=v]:closed::subpart2 { p1 : val; p2 : val; }
424 *
425 * 'val' can be a literal, or an expression like "prop(width, default) + 0.8".
426 *
427 * </pre>
428 */
429
430int uint() :
431{
432 Token i;
433}
434{
435 i=<UINT> { return Integer.parseInt(i.image); }
436}
437
438int int_() :
439{
440 int i;
441}
442{
443 <MINUS> i=uint() { return -i; } | i=uint() { return i; }
444}
445
446float ufloat() :
447{
448 Token f;
449}
450{
451 ( f=<UFLOAT> | f=<UINT> )
452 { return Float.parseFloat(f.image); }
453}
454
455float float_() :
456{
457 float f;
458}
459{
460 <MINUS> f=ufloat() { return -f; } | f=ufloat() { return f; }
461}
462
463String string() :
464{
465 Token t;
466}
467{
468 t=<STRING>
469 { return t.image.substring(1, t.image.length() - 1).replace("\\\"", "\"").replace("\\\\", "\\"); }
470}
471
472String ident():
473{
474 Token t;
475 String s;
476}
477{
478 ( t=<IDENT> | t=<SET> ) { return t.image; }
479}
480
481String string_or_ident() :
482{
483 Token t;
484 String s;
485}
486{
487 ( s=ident() | s=string() ) { return s; }
488}
489
490String regex() :
491{
492 Token t;
493}
494{
495 t=<REGEX>
496 { return t.image.substring(1, t.image.length() - 1); }
497}
498
499/**
500 * white-space
501 * @throws ParseException in case of parsing error
502 */
503void s() :
504{
505}
506{
507 ( <S> )?
508}
509
510/**
511 * mix of white-space and comments
512 * @throws ParseException in case of parsing error
513 */
514void w() :
515{
516}
517{
518 ( <S> | <COMMENT_START> <COMMENT_END> )*
519}
520
521/**
522 * comma delimited list of floats (at least 2, all &gt;= 0)
523 * @return list of floats
524 * @throws ParseException in case of parsing error
525 */
526List<Float> float_array() :
527{
528 float f;
529 List<Float> fs = new ArrayList<Float>();
530}
531{
532 f=ufloat() { fs.add(f); }
533 (
534 <COMMA> s()
535 f=ufloat() { fs.add(f); }
536 )+
537 {
538 return fs;
539 }
540}
541
542/**
543 * entry point for the main parser
544 * @param sheet MapCSS style source
545 * @throws ParseException in case of parsing error
546 */
547void sheet(MapCSSStyleSource sheet):
548{
549}
550{
551 { this.sheet = sheet; }
552 w()
553 (
554 try {
555 rule() w()
556 } catch (MapCSSException mex) {
557 Logging.error(mex);
558 error_skipto(RBRACE, mex);
559 w();
560 } catch (ParseException ex) {
561 error_skipto(RBRACE, null);
562 w();
563 }
564 )*
565 <EOF>
566}
567
568void rule():
569{
570 List<Selector> selectors;
571 Declaration decl;
572}
573{
574 selectors=selectors()
575 decl=declaration()
576 {
577 sheet.rules.add(new MapCSSRule(selectors, decl));
578 }
579}
580
581/** Read selectors, make sure that we read all tokens See #17746 */
582List<Selector> selectors_for_search():
583{
584 List<Selector> selectors;
585}
586{
587 selectors=selectors() <EOF>
588 { return selectors; }
589}
590
591List<Selector> selectors():
592{
593 List<Selector> selectors = new ArrayList<Selector>();
594 Selector sel;
595}
596{
597 sel=child_selector() { selectors.add(sel); }
598 (
599 <COMMA> w()
600 sel=child_selector() { selectors.add(sel); }
601 )*
602 { return selectors; }
603}
604
605Selector child_selector() :
606{
607 Selector.ChildOrParentSelectorType type = null;
608 Condition c;
609 List<Condition> conditions = new ArrayList<Condition>();
610 Selector selLeft;
611 LinkSelector selLink = null;
612 Selector selRight = null;
613}
614{
615 selLeft=selector() w()
616 (
617 (
618 (
619 (
620 <GREATER> { type = Selector.ChildOrParentSelectorType.CHILD; }
621 |
622 <LESS> { type = Selector.ChildOrParentSelectorType.PARENT; }
623 |
624 <PLUS> { type = Selector.ChildOrParentSelectorType.SIBLING; }
625 )
626 ( ( c=condition(Context.LINK) | c=class_or_pseudoclass(Context.LINK) ) { if (c!= null) conditions.add(c); } )*
627 |
628 <SUBSET_OR_EQUAL> { type = Selector.ChildOrParentSelectorType.SUBSET_OR_EQUAL; }
629 |
630 <NOT_SUBSET_OR_EQUAL> { type = Selector.ChildOrParentSelectorType.NOT_SUBSET_OR_EQUAL; }
631 |
632 <SUPERSET_OR_EQUAL> { type = Selector.ChildOrParentSelectorType.SUPERSET_OR_EQUAL; }
633 |
634 <NOT_SUPERSET_OR_EQUAL> { type = Selector.ChildOrParentSelectorType.NOT_SUPERSET_OR_EQUAL; }
635 |
636 <CROSSING> { type = Selector.ChildOrParentSelectorType.CROSSING; }
637 )
638 w()
639 |
640 { /* <GREATER> is optional for child selector */ type = Selector.ChildOrParentSelectorType.CHILD; }
641 )
642 { selLink = new LinkSelector(conditions); }
643 selRight=selector() w()
644 )?
645 { return selRight != null ? new ChildOrParentSelector(selLeft, selLink, selRight, type) : selLeft; }
646}
647
648Selector selector() :
649{
650 Token base;
651 Condition c;
652 Range r = Range.ZERO_TO_INFINITY;
653 List<Condition> conditions = new ArrayList<Condition>();
654 Subpart sub = null;
655}
656{
657 ( base=<IDENT> | base=<STAR> )
658 ( r=zoom() )?
659 ( ( c=condition(Context.PRIMITIVE) | c=class_or_pseudoclass(Context.PRIMITIVE) ) { if (c!= null) conditions.add(c); } )*
660 ( sub=subpart() )?
661 { return new GeneralSelector(base.image, r, conditions, sub); }
662}
663
664Range zoom() :
665{
666 Integer min = 0;
667 Integer max = Integer.MAX_VALUE;
668}
669{
670 <PIPE_Z>
671 (
672 <MINUS> max=uint()
673 |
674 LOOKAHEAD(2)
675 min=uint() <MINUS> ( max=uint() )?
676 |
677 min=uint() { max = min; }
678 )
679 { return GeneralSelector.fromLevel(min, max); }
680}
681
682Condition condition(Context context) :
683{
684 Condition c;
685 Expression e;
686}
687{
688 <LSQUARE> s()
689 (
690 LOOKAHEAD( simple_key_condition(context) s() <RSQUARE> )
691 c=simple_key_condition(context) s() <RSQUARE> { return c; }
692 |
693 LOOKAHEAD( simple_key_value_condition(context) s() <RSQUARE> )
694 c=simple_key_value_condition(context) s() <RSQUARE> { return c; }
695 |
696 e=expression() <RSQUARE> { return ConditionFactory.createExpressionCondition(e, context); }
697 )
698}
699
700String tag_key() :
701{
702 String s, s2;
703 Token t;
704}
705{
706 s=string() { return s; }
707 |
708 s=ident() ( <COLON> s2=ident() { s += ':' + s2; } )* { return s; }
709}
710
711Condition simple_key_condition(Context context) :
712{
713 boolean not = false;
714 KeyMatchType matchType = null;
715 String key;
716}
717{
718 ( <EXCLAMATION> { not = true; } )?
719 (
720 { matchType = KeyMatchType.REGEX; } key = regex()
721 |
722 key = tag_key()
723 )
724 ( LOOKAHEAD(2) <QUESTION> <EXCLAMATION> { matchType = KeyMatchType.FALSE; } )?
725 ( <QUESTION> { matchType = KeyMatchType.TRUE; } )?
726 { return ConditionFactory.createKeyCondition(key, not, matchType, context); }
727}
728
729Condition simple_key_value_condition(Context context) :
730{
731 String key;
732 String val;
733 float f;
734 int i;
735 KeyMatchType matchType = null;
736 Op op;
737 boolean considerValAsKey = false;
738}
739{
740 (
741 key = regex() s() { matchType = KeyMatchType.REGEX; }
742 |
743 key=tag_key() s()
744 )
745 (
746 LOOKAHEAD(3)
747 (
748 <EQUAL> <TILDE> { op=Op.REGEX; }
749 |
750 <EXCLAMATION> <TILDE> { op=Op.NREGEX; }
751 )
752 s()
753 ( <STAR> { considerValAsKey=true; } )?
754 val=regex()
755 |
756 (
757 <EXCLAMATION> <EQUAL> { op=Op.NEQ; }
758 |
759 <EQUAL> { op=Op.EQ; }
760 |
761 <TILDE> <EQUAL> { op=Op.ONE_OF; }
762 |
763 <CARET> <EQUAL> { op=Op.BEGINS_WITH; }
764 |
765 <DOLLAR> <EQUAL> { op=Op.ENDS_WITH; }
766 |
767 <STAR> <EQUAL> { op=Op.CONTAINS; }
768 )
769 s()
770 ( <STAR> { considerValAsKey=true; } )?
771 (
772 LOOKAHEAD(2)
773 i=int_() { val=Integer.toString(i); }
774 |
775 f=float_() { val=Float.toString(f); }
776 |
777 val=string_or_ident()
778 )
779 |
780 (
781 <GREATER_EQUAL> { op=Op.GREATER_OR_EQUAL; }
782 |
783 <GREATER> { op=Op.GREATER; }
784 |
785 <LESS_EQUAL> { op=Op.LESS_OR_EQUAL; }
786 |
787 <LESS> { op=Op.LESS; }
788 )
789 s()
790 f=float_() { val=Float.toString(f); }
791 )
792 { return KeyMatchType.REGEX == matchType
793 ? ConditionFactory.createRegexpKeyRegexpValueCondition(key, val, op)
794 : ConditionFactory.createKeyValueCondition(key, val, op, context, considerValAsKey); }
795}
796
797Condition class_or_pseudoclass(Context context) :
798{
799 String s;
800 boolean not = false;
801 boolean pseudo;
802}
803{
804 ( <EXCLAMATION> { not = true; } )?
805 (
806 <FULLSTOP> { pseudo = false; }
807 |
808 <COLON> { pseudo = true; }
809 )
810 s=ident()
811 {
812 if (pseudo && sheet != null && sheet.isRemoveAreaStylePseudoClass() && s.matches("areaStyle|area-style|area_style")) {
813 Logging.warn("Removing 'areaStyle' pseudo-class. This class is only meant for validator");
814 return null;
815 } else if (pseudo) {
816 return ConditionFactory.createPseudoClassCondition(s, not, context);
817 } else {
818 return ConditionFactory.createClassCondition(s, not, context);
819 }
820 }
821}
822
823Subpart subpart() :
824{
825 String s;
826 Expression e;
827}
828{
829 <DCOLON>
830 (
831 s=ident() { return new Subpart.StringSubpart(s); }
832 |
833 <STAR> { return new Subpart.StringSubpart("*"); }
834 |
835 <LPAR> e=expression() <RPAR> { return new Subpart.ExpressionSubpart(e); }
836 )
837}
838
839Declaration declaration() :
840{
841 List<Instruction> ins = new ArrayList<Instruction>();
842 Instruction i;
843 Token key;
844 Object val = null;
845}
846{
847 <LBRACE> w()
848 (
849 (
850 <SET> w()
851 (<FULLSTOP>)? // specification allows "set .class" to set "class". we also support "set class"
852 key=<IDENT> w()
853 ( <EQUAL> val=expression() )?
854 { ins.add(new Instruction.AssignmentInstruction(key.image, val == null ? true : val, true)); }
855 ( <RBRACE> { return new Declaration(ins, declarationCounter++); } | <SEMICOLON> w() )
856 )
857 |
858 <MINUS> <IDENT> w() <COLON> w() expression() <SEMICOLON> w()
859 |
860 key=<IDENT> w() <COLON> w()
861 (
862 LOOKAHEAD( float_array() w() ( <SEMICOLON> | <RBRACE> ) )
863 val=float_array()
864 { ins.add(new Instruction.AssignmentInstruction(key.image, val, false)); }
865 w()
866 ( <RBRACE> { return new Declaration(ins, declarationCounter++); } | <SEMICOLON> w() )
867 |
868 LOOKAHEAD( expression() ( <SEMICOLON> | <RBRACE> ) )
869 val=expression()
870 { ins.add(new Instruction.AssignmentInstruction(key.image, val, false)); }
871 ( <RBRACE> { return new Declaration(ins, declarationCounter++); } | <SEMICOLON> w() )
872 |
873 val=readRaw() w() { ins.add(new Instruction.AssignmentInstruction(key.image, val, false)); }
874 )
875 )*
876 <RBRACE>
877 { return new Declaration(ins, declarationCounter++); }
878}
879
880/**
881 * General expression.
882 * Separate production rule for each level of operator precedence (recursive descent).
883 */
884Expression expression() :
885{
886 Expression e;
887}
888{
889 e=conditional_expression()
890 {
891 return e;
892 }
893}
894
895Expression conditional_expression() :
896{
897 Expression e, e1, e2;
898 String op = null;
899}
900{
901 e=or_expression()
902 (
903 <QUESTION> w()
904 e1=conditional_expression()
905 <COLON> w()
906 e2=conditional_expression()
907 {
908 e = ExpressionFactory.createFunctionExpression("cond", Arrays.asList(e, e1, e2));
909 }
910 )?
911 {
912 return e;
913 }
914}
915
916Expression or_expression() :
917{
918 Expression e, e2;
919 String op = null;
920}
921{
922 e=and_expression()
923 (
924 <PIPE> <PIPE> w()
925 e2=and_expression()
926 {
927 e = ExpressionFactory.createFunctionExpression("or", Arrays.asList(e, e2));
928 }
929 )*
930 {
931 return e;
932 }
933}
934
935Expression and_expression() :
936{
937 Expression e, e2;
938 String op = null;
939}
940{
941 e=relational_expression()
942 (
943 <AMPERSAND> <AMPERSAND> w()
944 e2=relational_expression()
945 {
946 e = ExpressionFactory.createFunctionExpression("and", Arrays.asList(e, e2));
947 }
948 )*
949 {
950 return e;
951 }
952}
953
954Expression relational_expression() :
955{
956 Expression e, e2;
957 String op = null;
958}
959{
960 e=additive_expression()
961 (
962 (
963 <GREATER_EQUAL> { op = "greater_equal"; }
964 |
965 <LESS_EQUAL> { op = "less_equal"; }
966 |
967 <GREATER> { op = "greater"; }
968 |
969 <LESS> { op = "less"; }
970 |
971 <EQUAL> ( <EQUAL> )? { op = "equal"; }
972 |
973 <EXCLAMATION> <EQUAL> { op = "not_equal"; }
974 ) w()
975 e2=additive_expression()
976 {
977 e = ExpressionFactory.createFunctionExpression(op, Arrays.asList(e, e2));
978 }
979 )?
980 {
981 return e;
982 }
983}
984
985Expression additive_expression() :
986{
987 Expression e, e2;
988 String op = null;
989}
990{
991 e=multiplicative_expression()
992 (
993 ( <PLUS> { op = "plus"; } | <MINUS> { op = "minus"; } ) w()
994 e2=multiplicative_expression()
995 {
996 e = ExpressionFactory.createFunctionExpression(op, Arrays.asList(e, e2));
997 }
998 )*
999 {
1000 return e;
1001 }
1002}
1003
1004Expression multiplicative_expression() :
1005{
1006 Expression e, e2;
1007 String op = null;
1008}
1009{
1010 e=unary_expression()
1011 (
1012 ( <STAR> { op = "times"; } | <SLASH> { op = "divided_by"; } ) w()
1013 e2=unary_expression()
1014 {
1015 e = ExpressionFactory.createFunctionExpression(op, Arrays.asList(e, e2));
1016 }
1017 )*
1018 {
1019 return e;
1020 }
1021}
1022
1023Expression unary_expression() :
1024{
1025 Expression e;
1026 String op = null;
1027}
1028{
1029 (
1030 <MINUS> { op = "minus"; } w()
1031 |
1032 <EXCLAMATION> { op = "not"; } w()
1033 )?
1034 e=primary() w()
1035 {
1036 if (op == null)
1037 return e;
1038 return ExpressionFactory.createFunctionExpression(op, Collections.singletonList(e));
1039 }
1040}
1041
1042Expression primary() :
1043{
1044 Expression nested;
1045 Expression fn;
1046 Object lit;
1047}
1048{
1049 LOOKAHEAD(3) // both function and identifier start with an identifier (+ optional whitespace)
1050 fn=function() { return fn; }
1051 |
1052 lit=literal()
1053 {
1054 if (lit == null)
1055 return NullExpression.INSTANCE;
1056 else if (lit instanceof String && PlaceholderExpression.PATTERN_PLACEHOLDER.matcher((String) lit).find()) {
1057 return new PlaceholderExpression((String) lit);
1058 }
1059 return new LiteralExpression(lit);
1060 }
1061 |
1062 <LPAR> w() nested=expression() <RPAR> { return nested; }
1063}
1064
1065Expression function() :
1066{
1067 Expression arg;
1068 String name;
1069 List<Expression> args = new ArrayList<Expression>();
1070}
1071{
1072 name=ident() w()
1073 <LPAR> w()
1074 (
1075 arg=expression() { args.add(arg); }
1076 ( <COMMA> w() arg=expression() { args.add(arg); } )*
1077 )?
1078 <RPAR>
1079 { return ExpressionFactory.createFunctionExpression(name, args); }
1080}
1081
1082Object literal() :
1083{
1084 String val, pref;
1085 Token t;
1086 Float f;
1087}
1088{
1089 LOOKAHEAD(2)
1090 pref=ident() t=<HEXCOLOR>
1091 {
1092 return new NamedColorProperty(
1093 NamedColorProperty.COLOR_CATEGORY_MAPPAINT,
1094 sheet == null ? "MapCSS" : sheet.title, pref,
1095 ColorHelper.html2color(t.image)).get();
1096 }
1097 |
1098 t=<IDENT> { return new Keyword(t.image); }
1099 |
1100 val=string() { return val; }
1101 |
1102 <PLUS> f=ufloat() { return new Instruction.RelativeFloat(f); }
1103 |
1104 LOOKAHEAD(2)
1105 f=ufloat_unit() { return f; }
1106 |
1107 f=ufloat() { return f; }
1108 |
1109 t=<HEXCOLOR> { return ColorHelper.html2color(t.image); }
1110}
1111
1112/**
1113 * Number followed by a unit.
1114 *
1115 * Returns angles in radians and lengths in pixels.
1116 */
1117Float ufloat_unit() :
1118{
1119 float f;
1120 String u;
1121}
1122{
1123 f=ufloat() ( u=ident() | <DEG> { u = "°"; } | <PERCENT> { u = "%"; } )
1124 {
1125 Double m = unit_factor(u);
1126 if (m == null)
1127 return null;
1128 return (float) (f * m);
1129 }
1130}
1131
1132JAVACODE
1133private Double unit_factor(String unit) {
1134 switch (unit) {
1135 case "deg":
1136 case "°": return Math.PI / 180;
1137 case "rad": return 1.;
1138 case "grad": return Math.PI / 200;
1139 case "turn": return 2 * Math.PI;
1140 case "%": return 0.01;
1141 case "px": return 1.;
1142 case "cm": return 96/2.54;
1143 case "mm": return 9.6/2.54;
1144 case "in": return 96.;
1145 case "q": return 2.4/2.54;
1146 case "pc": return 16.;
1147 case "pt": return 96./72;
1148 default: return null;
1149 }
1150}
1151
1152JAVACODE
1153void error_skipto(int kind, MapCSSException me) {
1154 if (token.kind == EOF)
1155 throw new ParseException("Reached end of file while parsing");
1156
1157 Exception e = null;
1158 ParseException pe = generateParseException();
1159
1160 if (me != null) {
1161 final Token token = Utils.firstNonNull(pe.currentToken.next, pe.currentToken);
1162 me.setLine(token.beginLine);
1163 me.setColumn(token.beginColumn);
1164 e = me;
1165 } else {
1166 e = new ParseException(pe.getMessage()); // prevent memory leak
1167 }
1168
1169 Logging.error("Skipping to the next rule, because of an error: " + e);
1170 if (sheet != null) {
1171 sheet.logError(e);
1172 }
1173 Token t;
1174 do {
1175 t = getNextToken();
1176 } while (t.kind != kind && t.kind != EOF);
1177 if (t.kind == EOF)
1178 throw new ParseException("Reached end of file while parsing");
1179}
1180
1181JAVACODE
1182/**
1183 * read everything to the next semicolon
1184 */
1185String readRaw() {
1186 Token t;
1187 StringBuilder s = new StringBuilder();
1188 while (true) {
1189 t = getNextToken();
1190 if ((t.kind == S || t.kind == STRING || t.kind == UNEXPECTED_CHAR) &&
1191 t.image.contains("\n")) {
1192 ParseException e = new ParseException(String.format("Warning: end of line while reading an unquoted string at line %s column %s.", t.beginLine, t.beginColumn));
1193 Logging.error(e);
1194 if (sheet != null) {
1195 sheet.logError(e);
1196 }
1197 }
1198 if (t.kind == SEMICOLON || t.kind == EOF)
1199 break;
1200 s.append(t.image);
1201 }
1202 if (t.kind == EOF)
1203 throw new ParseException("Reached end of file while parsing");
1204 return s.toString();
1205}
1206
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