source: josm/trunk/src/org/openstreetmap/josm/gui/mappaint/mapcss/MapCSSParser.jj@ 9958

Last change on this file since 9958 was 9958, checked in by bastiK, 8 years ago

fix svn:eol property

  • Property svn:eol-style set to native
File size: 30.5 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 static org.openstreetmap.josm.tools.I18n.tr;
11
12import java.io.InputStream;
13import java.io.Reader;
14import java.util.ArrayList;
15import java.util.Arrays;
16import java.util.Collections;
17import java.util.List;
18import java.util.Locale;
19
20import org.openstreetmap.josm.Main;
21import org.openstreetmap.josm.gui.mappaint.Keyword;
22import org.openstreetmap.josm.gui.mappaint.mapcss.Condition;
23import org.openstreetmap.josm.gui.mappaint.mapcss.Condition.Context;
24import org.openstreetmap.josm.gui.mappaint.mapcss.Expression;
25import org.openstreetmap.josm.gui.mappaint.mapcss.ExpressionFactory;
26import org.openstreetmap.josm.gui.mappaint.mapcss.ExpressionFactory.NullExpression;
27import org.openstreetmap.josm.gui.mappaint.mapcss.Instruction;
28import org.openstreetmap.josm.gui.mappaint.mapcss.LiteralExpression;
29import org.openstreetmap.josm.gui.mappaint.mapcss.MapCSSException;
30import org.openstreetmap.josm.gui.mappaint.mapcss.MapCSSRule;
31import org.openstreetmap.josm.gui.mappaint.mapcss.MapCSSRule.Declaration;
32import org.openstreetmap.josm.gui.mappaint.mapcss.MapCSSStyleSource;
33import org.openstreetmap.josm.gui.mappaint.mapcss.Selector;
34import org.openstreetmap.josm.gui.mappaint.mapcss.Selector.ChildOrParentSelector;
35import org.openstreetmap.josm.gui.mappaint.mapcss.Selector.GeneralSelector;
36import org.openstreetmap.josm.gui.mappaint.mapcss.Selector.LinkSelector;
37import org.openstreetmap.josm.gui.mappaint.mapcss.Subpart;
38import org.openstreetmap.josm.tools.ColorHelper;
39import org.openstreetmap.josm.tools.Pair;
40import org.openstreetmap.josm.tools.Utils;
41
42/**
43 * MapCSS parser.
44 *
45 * Contains two independent grammars:
46 * (a) the preprocessor and (b) the main mapcss parser.
47 *
48 * The preprocessor handles @supports and @media syntax (@media is deprecated).
49 * Basically this allows to write one style for different versions of JOSM (or different editors).
50 * When the @supports condition is not fulfilled, it should simply skip over
51 * the whole section and not attempt to parse the possibly unknown
52 * grammar. It preserves whitespace and comments, in order to keep the
53 * line and column numbers in the error messages correct for the second pass.
54 *
55 */
56public class MapCSSParser {
57 MapCSSStyleSource sheet;
58 StringBuilder sb;
59 int declarationCounter;
60
61 /**
62 * Nicer way to refer to a lexical state.
63 */
64 public static enum LexicalState {
65 PREPROCESSOR(0), /* the preprocessor */
66 DEFAULT(2); /* the main parser */
67
68 int idx; // the integer, which javacc assigns to this state
69
70 LexicalState(int idx) {
71 if (!this.name().equals(MapCSSParserTokenManager.lexStateNames[idx])) {
72 throw new RuntimeException();
73 }
74 this.idx = idx;
75 }
76 };
77
78 /**
79 * Constructor which initializes the parser with a certain lexical state.
80 * @param in input
81 * @param encoding contents encoding
82 * @param initState initial state
83 */
84 public MapCSSParser(InputStream in, String encoding, LexicalState initState) {
85 this(createTokenManager(in, encoding, initState));
86 declarationCounter = 0;
87 }
88
89 protected static MapCSSParserTokenManager createTokenManager(InputStream in, String encoding, LexicalState initState) {
90 SimpleCharStream scs;
91 try {
92 scs = new SimpleCharStream(in, encoding, 1, 1);
93 } catch (java.io.UnsupportedEncodingException e) {
94 throw new RuntimeException(e);
95 }
96 return new MapCSSParserTokenManager(scs, initState.idx);
97 }
98
99 /**
100 * Constructor which initializes the parser with a certain lexical state.
101 * @param in input
102 * @param initState initial state
103 */
104 public MapCSSParser(Reader in, LexicalState initState) {
105 this(createTokenManager(in, initState));
106 declarationCounter = 0;
107 }
108
109 protected static MapCSSParserTokenManager createTokenManager(Reader in, LexicalState initState) {
110 final SimpleCharStream scs = new SimpleCharStream(in, 1, 1);
111 return new MapCSSParserTokenManager(scs, initState.idx);
112 }
113}
114PARSER_END(MapCSSParser)
115
116/**
117 * Token definitions
118 *
119 * Lexical states for the preprocessor: <PREPROCESSOR>, <PP_COMMENT>
120 * Lexical states for the main parser: <DEFAULT>, <COMMENT>
121 */
122
123<PREPROCESSOR>
124TOKEN:
125{
126 < PP_AND: "and" >
127| < PP_OR: "or" >
128| < PP_NOT: "not" >
129| < PP_SUPPORTS: "@supports" >
130| < PP_MEDIA: "@media" >
131| < PP_NEWLINECHAR: "\n" | "\r" | "\f" >
132| < PP_WHITESPACE: " " | "\t" >
133| < PP_COMMENT_START: "/*" > : PP_COMMENT
134}
135
136<PP_COMMENT>
137TOKEN:
138{
139 < PP_COMMENT_END: "*/" > : PREPROCESSOR
140}
141
142<PP_COMMENT>
143MORE:
144{
145 < ~[] >
146}
147
148<DEFAULT>
149TOKEN [IGNORE_CASE]:
150{
151 /* Special keyword in some contexts, ordinary identifier in other contexts.
152 Use the parsing rule <code>ident()</code> to refer to a general
153 identifier, including "set". */
154 < SET: "set" >
155}
156
157<DEFAULT,PREPROCESSOR>
158TOKEN:
159{
160 < IDENT: ["a"-"z","A"-"Z","_"] ( ["a"-"z","A"-"Z","_","-","0"-"9"] )* >
161| < UINT: ( ["0"-"9"] )+ >
162| < STRING: "\"" ( [" ","!","#"-"[","]"-"~","\u0080"-"\uFFFF"] | "\\\"" | "\\\\" )* "\"" >
163| < #PREDEFINED: "\\" ["d","D","s","S","w","W","b","B","A","G","Z","z"] >
164| < #REGEX_CHAR_WITHOUT_STAR: [" "-")","+"-".","0"-"[","]"-"~","\u0080"-"\uFFFF"] | "\\/" | "\\\\" | "\\[" | "\\]" | "\\+" | "\\." | "\\'" | "\\\"" | "\\(" | "\\)" | "\\{" | "\\}" | "\\?" | "\\*" | "\\^" | "\\$" | "\\|" | "\\p" |<PREDEFINED> >
165| < REGEX: "/" <REGEX_CHAR_WITHOUT_STAR> ( <REGEX_CHAR_WITHOUT_STAR> | "*" )* "/" >
166| < LBRACE: "{" >
167| < RBRACE: "}" >
168| < LPAR: "(" >
169| < RPAR: ")" >
170| < COMMA: "," >
171| < COLON: ":" >
172}
173
174<PREPROCESSOR>
175TOKEN:
176{
177 < PP_SOMETHING_ELSE : ~[] >
178}
179
180<DEFAULT>
181TOKEN:
182{
183 < UFLOAT: ( ["0"-"9"] )+ ( "." ( ["0"-"9"] )+ )? >
184| < #H: ["0"-"9","a"-"f","A"-"F"] >
185| < HEXCOLOR: "#" ( <H><H><H><H><H><H><H><H> | <H><H><H><H><H><H> | <H><H><H> ) >
186| < S: ( " " | "\t" | "\n" | "\r" | "\f" )+ >
187| < STAR: "*" >
188| < SLASH: "/" >
189| < LSQUARE: "[" >
190| < RSQUARE: "]" >
191| < GREATER_EQUAL: ">=" >
192| < LESS_EQUAL: "<=" >
193| < GREATER: ">" >
194| < LESS: "<" >
195| < EQUAL: "=" >
196| < EXCLAMATION: "!" >
197| < TILDE: "~" >
198| < DCOLON: "::" >
199| < SEMICOLON: ";" >
200| < PIPE: "|" >
201| < PIPE_Z: "|z" >
202| < PLUS: "+" >
203| < MINUS: "-" >
204| < AMPERSAND: "&" >
205| < QUESTION: "?" >
206| < DOLLAR: "$" >
207| < CARET: "^" >
208| < FULLSTOP: "." >
209| < DEG: "°" >
210| < ELEMENT_OF: "∈" >
211| < CROSSING: "⧉" >
212| < PERCENT: "%" >
213| < COMMENT_START: "/*" > : COMMENT
214| < UNEXPECTED_CHAR : ~[] > // avoid TokenMgrErrors because they are hard to recover from
215}
216
217<COMMENT>
218TOKEN:
219{
220 < COMMENT_END: "*/" > : DEFAULT
221}
222
223<COMMENT>
224SKIP:
225{
226 < ~[] >
227}
228
229
230/*
231 * Preprocessor parser definitions:
232 *
233 * <pre>
234 *
235 * {@literal @media} { ... } queries are supported, following http://www.w3.org/TR/css3-mediaqueries/#syntax
236 *
237 * media_query
238 * ___________________________|_______________________________
239 * | |
240 * {@literal @media} all and (min-josm-version: 7789) and (max-josm-version: 7790), all and (user-agent: xyz) { ... }
241 * |______________________|
242 * |
243 * media_expression
244 * </pre>
245 */
246
247
248/**
249 * root method for the preprocessor.
250 * @param sheet MapCSS style source
251 * @return result string
252 * @throws ParseException in case of parsing error
253 */
254String pp_root(MapCSSStyleSource sheet):
255{
256}
257{
258 { sb = new StringBuilder(); this.sheet = sheet; }
259 pp_black_box(true) <EOF>
260 { return sb.toString(); }
261}
262
263/**
264 * Parse any unknown grammar (black box).
265 *
266 * Only stop when "@media" is encountered and keep track of correct number of
267 * opening and closing curly brackets.
268 *
269 * @param write false if this content should be skipped (@pp_media condition is not fulfilled), true otherwise
270 * @throws ParseException in case of parsing error
271 */
272void pp_black_box(boolean write):
273{
274 Token t;
275}
276{
277 (
278 (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); }
279 |
280 pp_w1()
281 |
282 pp_supports(!write)
283 |
284 pp_media(!write)
285 |
286 t=<LBRACE> { if (write) sb.append(t.image); } pp_black_box(write) t=<RBRACE> { if (write) sb.append(t.image); }
287 )*
288}
289
290/**
291 * Parses an @supports rule.
292 *
293 * @param ignore if the content of this rule should be ignored
294 * (because we are already inside a @supports block that didn't pass)
295 * @throws ParseException in case of parsing error
296 */
297void pp_supports(boolean ignore):
298{
299 boolean pass;
300}
301{
302 <PP_SUPPORTS> pp_w()
303 pass=pp_supports_condition()
304 <LBRACE>
305 pp_black_box(pass && !ignore)
306 <RBRACE>
307}
308
309/**
310 * Parses the condition of the @supports rule.
311 *
312 * Unlike other parsing rules, grabs trailing whitespace.
313 * @return true, if the condition is fulfilled
314 * @throws ParseException in case of parsing error
315 */
316boolean pp_supports_condition():
317{
318 boolean pass;
319 boolean q;
320}
321{
322 (
323 <PP_NOT> pp_w() q=pp_supports_condition_in_parens() { pass = !q; } pp_w()
324 |
325 LOOKAHEAD(pp_supports_condition_in_parens() pp_w() <PP_AND>)
326 pass=pp_supports_condition_in_parens() pp_w()
327 ( <PP_AND> pp_w() q=pp_supports_condition_in_parens() { pass = pass && q; } pp_w() )+
328 |
329 LOOKAHEAD(pp_supports_condition_in_parens() pp_w() <PP_OR>)
330 pass=pp_supports_condition_in_parens() pp_w()
331 ( <PP_OR> pp_w() q=pp_supports_condition_in_parens() { pass = pass || q; } pp_w() )+
332 |
333 pass=pp_supports_condition_in_parens() pp_w()
334 )
335 { return pass; }
336}
337
338/**
339 * Parses something in parenthesis inside the condition of the @supports rule.
340 *
341 * @return true, if the condition is fulfilled
342 * @throws ParseException in case of parsing error
343 */
344boolean pp_supports_condition_in_parens():
345{
346 boolean pass;
347}
348{
349 (
350 LOOKAHEAD(pp_supports_declaration_condition())
351 pass=pp_supports_declaration_condition()
352 |
353 <LPAR> pp_w() pass=pp_supports_condition() <RPAR>
354 )
355 { return pass; }
356}
357
358/**
359 * Parse an @supports declaration condition, e.&nbsp;g. a single (key:value) or (key) statement.
360 *
361 * The parsing rule {@link #literal()} from the main mapcss parser is reused here.
362 *
363 * @return true if the condition is fulfilled
364 * @throws ParseException in case of parsing error
365 */
366boolean pp_supports_declaration_condition():
367{
368 Token t;
369 String feature;
370 Object val = null;
371}
372{
373 <LPAR> pp_w() t=<IDENT> { feature = t.image; } pp_w() ( <COLON> pp_w() val=literal() )? <RPAR>
374 { return this.sheet.evalSupportsDeclCondition(feature, val); }
375}
376
377// deprecated
378void pp_media(boolean ignore):
379{
380 boolean pass = false;
381 boolean q;
382 boolean empty = true;
383}
384{
385 {
386 if (sheet != null) {
387 String msg = tr("Detected deprecated ''{0}'' in ''{1}'' which will be removed shortly. Use ''{2}'' instead.",
388 "@media", sheet.getDisplayString(), "@supports");
389 Main.error(msg);
390 sheet.logWarning(msg);
391 }
392 }
393 <PP_MEDIA> pp_w()
394 ( q=pp_media_query() { pass = pass || q; empty = false; }
395 ( <COMMA> pp_w() q=pp_media_query() { pass = pass || q; } )*
396 )?
397 <LBRACE>
398 pp_black_box((empty || pass) && !ignore)
399 <RBRACE>
400}
401
402// deprecated
403boolean pp_media_query():
404{
405 Token t;
406 String mediatype = "all";
407 boolean pass = true;
408 boolean invert = false;
409 boolean e;
410}
411{
412 ( <PP_NOT> { invert = true; } pp_w() )?
413 (
414 t=<IDENT> { mediatype = t.image.toLowerCase(Locale.ENGLISH); } pp_w()
415 ( <PP_AND> pp_w() e=pp_media_expression() { pass = pass && e; } pp_w() )*
416 |
417 e=pp_media_expression() { pass = pass && e; } pp_w()
418 ( <PP_AND> pp_w() e=pp_media_expression() { pass = pass && e; } pp_w() )*
419 )
420 {
421 if (!"all".equals(mediatype)) {
422 pass = false;
423 }
424 return invert ? (!pass) : pass;
425 }
426}
427
428/**
429 * Parse an @media expression.
430 *
431 * The parsing rule {@link #literal()} from the main mapcss parser is reused here.
432 *
433 * @return true if the condition is fulfilled
434 * @throws ParseException in case of parsing error
435 */
436// deprecated
437boolean pp_media_expression():
438{
439 Token t;
440 String feature;
441 Object val = null;
442}
443{
444 <LPAR> pp_w() t=<IDENT> { feature = t.image; } pp_w() ( <COLON> pp_w() val=literal() )? <RPAR>
445 { return this.sheet.evalSupportsDeclCondition(feature, val); }
446}
447
448void pp_w1():
449{
450 Token t;
451}
452{
453 t=<PP_NEWLINECHAR> { sb.append(t.image); }
454 |
455 t=<PP_WHITESPACE> { sb.append(t.image); }
456 |
457 t=<PP_COMMENT_START> { sb.append(t.image); } t=<PP_COMMENT_END> { sb.append(t.image); }
458}
459
460void pp_w():
461{
462}
463{
464 ( pp_w1() )*
465}
466
467/*
468 * Parser definition for the main MapCSS parser:
469 *
470 * <pre>
471 *
472 * rule
473 * _______________________|______________________________
474 * | |
475 * selector declaration
476 * _________|___________________ _________|____________
477 * | | | |
478 *
479 * way|z11-12[highway=residential] { color: red; width: 3 }
480 *
481 * |_____||___________________| |_________|
482 * | | |
483 * zoom condition instruction
484 *
485 * more general:
486 *
487 * way|z13-[a=b][c=d]::subpart, way|z-3[u=v]:closed::subpart2 { p1 : val; p2 : val; }
488 *
489 * 'val' can be a literal, or an expression like "prop(width, default) + 0.8".
490 *
491 * </pre>
492 */
493
494int uint() :
495{
496 Token i;
497}
498{
499 i=<UINT> { return Integer.parseInt(i.image); }
500}
501
502int int_() :
503{
504 int i;
505}
506{
507 <MINUS> i=uint() { return -i; } | i=uint() { return i; }
508}
509
510float ufloat() :
511{
512 Token f;
513}
514{
515 ( f=<UFLOAT> | f=<UINT> )
516 { return Float.parseFloat(f.image); }
517}
518
519float float_() :
520{
521 float f;
522}
523{
524 <MINUS> f=ufloat() { return -f; } | f=ufloat() { return f; }
525}
526
527String string() :
528{
529 Token t;
530}
531{
532 t=<STRING>
533 { return t.image.substring(1, t.image.length() - 1).replace("\\\"", "\"").replace("\\\\", "\\"); }
534}
535
536String ident():
537{
538 Token t;
539 String s;
540}
541{
542 ( t=<IDENT> | t=<SET> ) { return t.image; }
543}
544
545String string_or_ident() :
546{
547 Token t;
548 String s;
549}
550{
551 ( s=ident() | s=string() ) { return s; }
552}
553
554String regex() :
555{
556 Token t;
557}
558{
559 t=<REGEX>
560 { return t.image.substring(1, t.image.length() - 1); }
561}
562
563/**
564 * white-space
565 * @throws ParseException in case of parsing error
566 */
567void s() :
568{
569}
570{
571 ( <S> )?
572}
573
574/**
575 * mix of white-space and comments
576 * @throws ParseException in case of parsing error
577 */
578void w() :
579{
580}
581{
582 ( <S> | <COMMENT_START> <COMMENT_END> )*
583}
584
585/**
586 * comma delimited list of floats (at least 2, all &gt;= 0)
587 * @return list of floats
588 * @throws ParseException in case of parsing error
589 */
590List<Float> float_array() :
591{
592 float f;
593 List<Float> fs = new ArrayList<Float>();
594}
595{
596 f=ufloat() { fs.add(f); }
597 (
598 <COMMA> s()
599 f=ufloat() { fs.add(f); }
600 )+
601 {
602 return fs;
603 }
604}
605
606/**
607 * entry point for the main parser
608 * @param sheet MapCSS style source
609 * @throws ParseException in case of parsing error
610 */
611void sheet(MapCSSStyleSource sheet):
612{
613}
614{
615 { this.sheet = sheet; }
616 w()
617 (
618 try {
619 rule() w()
620 } catch (MapCSSException mex) {
621 Main.error(mex);
622 error_skipto(RBRACE, mex);
623 w();
624 } catch (ParseException ex) {
625 error_skipto(RBRACE, null);
626 w();
627 }
628 )*
629 <EOF>
630}
631
632void rule():
633{
634 List<Selector> selectors;
635 Declaration decl;
636}
637{
638 selectors=selectors()
639 decl=declaration()
640 {
641 for (Selector s : selectors) {
642 sheet.rules.add(new MapCSSRule(s, decl));
643 }
644 }
645}
646
647List<Selector> selectors():
648{
649 List<Selector> selectors = new ArrayList<Selector>();
650 Selector sel;
651}
652{
653 sel=child_selector() { selectors.add(sel); }
654 (
655 <COMMA> w()
656 sel=child_selector() { selectors.add(sel); }
657 )*
658 { return selectors; }
659}
660
661Selector child_selector() :
662{
663 Selector.ChildOrParentSelectorType type = null;
664 Condition c;
665 List<Condition> conditions = new ArrayList<Condition>();
666 Selector selLeft;
667 LinkSelector selLink = null;
668 Selector selRight = null;
669}
670{
671 selLeft=selector() w()
672 (
673 (
674 (
675 (
676 <GREATER> { type = Selector.ChildOrParentSelectorType.CHILD; }
677 |
678 <LESS> { type = Selector.ChildOrParentSelectorType.PARENT; }
679 |
680 <PLUS> { type = Selector.ChildOrParentSelectorType.SIBLING; }
681 )
682 ( ( c=condition(Context.LINK) | c=class_or_pseudoclass(Context.LINK) ) { conditions.add(c); } )*
683 |
684 <ELEMENT_OF> { type = Selector.ChildOrParentSelectorType.ELEMENT_OF; }
685 |
686 <CROSSING> { type = Selector.ChildOrParentSelectorType.CROSSING; }
687 )
688 w()
689 |
690 { /* <GREATER> is optional for child selector */ type = Selector.ChildOrParentSelectorType.CHILD; }
691 )
692 { selLink = new LinkSelector(conditions); }
693 selRight=selector() w()
694 )?
695 { return selRight != null ? new ChildOrParentSelector(selLeft, selLink, selRight, type) : selLeft; }
696}
697
698Selector selector() :
699{
700 Token base;
701 Condition c;
702 Pair<Integer, Integer> r = null;
703 List<Condition> conditions = new ArrayList<Condition>();
704 Subpart sub = null;
705}
706{
707 ( base=<IDENT> | base=<STAR> )
708 ( r=zoom() )?
709 ( ( c=condition(Context.PRIMITIVE) | c=class_or_pseudoclass(Context.PRIMITIVE) ) { conditions.add(c); } )*
710 ( sub=subpart() )?
711 { return new GeneralSelector(base.image, r, conditions, sub); }
712}
713
714Pair<Integer, Integer> zoom() :
715{
716 Integer min = 0;
717 Integer max = Integer.MAX_VALUE;
718}
719{
720 <PIPE_Z>
721 (
722 <MINUS> max=uint()
723 |
724 LOOKAHEAD(2)
725 min=uint() <MINUS> ( max=uint() )?
726 |
727 min=uint() { max = min; }
728 )
729 { return new Pair<Integer, Integer>(min, max); }
730}
731
732Condition condition(Context context) :
733{
734 Condition c;
735 Expression e;
736}
737{
738 <LSQUARE> s()
739 (
740 LOOKAHEAD( simple_key_condition(context) s() <RSQUARE> )
741 c=simple_key_condition(context) s() <RSQUARE> { return c; }
742 |
743 LOOKAHEAD( simple_key_value_condition(context) s() <RSQUARE> )
744 c=simple_key_value_condition(context) s() <RSQUARE> { return c; }
745 |
746 e=expression() <RSQUARE> { return Condition.createExpressionCondition(e, context); }
747 )
748}
749
750String tag_key() :
751{
752 String s, s2;
753 Token t;
754}
755{
756 s=string() { return s; }
757 |
758 s=ident() ( <COLON> s2=ident() { s += ':' + s2; } )* { return s; }
759}
760
761Condition simple_key_condition(Context context) :
762{
763 boolean not = false;
764 Condition.KeyMatchType matchType = null;;
765 String key;
766}
767{
768 ( <EXCLAMATION> { not = true; } )?
769 (
770 { matchType = Condition.KeyMatchType.REGEX; } key = regex()
771 |
772 key = tag_key()
773 )
774 ( LOOKAHEAD(2) <QUESTION> <EXCLAMATION> { matchType = Condition.KeyMatchType.FALSE; } )?
775 ( <QUESTION> { matchType = Condition.KeyMatchType.TRUE; } )?
776 { return Condition.createKeyCondition(key, not, matchType, context); }
777}
778
779Condition simple_key_value_condition(Context context) :
780{
781 String key;
782 String val;
783 float f;
784 int i;
785 Condition.KeyMatchType matchType = null;;
786 Condition.Op op;
787 boolean considerValAsKey = false;
788}
789{
790 (
791 key = regex() s() { matchType = Condition.KeyMatchType.REGEX; }
792 |
793 key=tag_key() s()
794 )
795 (
796 LOOKAHEAD(3)
797 (
798 <EQUAL> <TILDE> { op=Condition.Op.REGEX; }
799 |
800 <EXCLAMATION> <TILDE> { op=Condition.Op.NREGEX; }
801 )
802 s()
803 ( <STAR> { considerValAsKey=true; } )?
804 val=regex()
805 |
806 (
807 <EXCLAMATION> <EQUAL> { op=Condition.Op.NEQ; }
808 |
809 <EQUAL> { op=Condition.Op.EQ; }
810 |
811 <TILDE> <EQUAL> { op=Condition.Op.ONE_OF; }
812 |
813 <CARET> <EQUAL> { op=Condition.Op.BEGINS_WITH; }
814 |
815 <DOLLAR> <EQUAL> { op=Condition.Op.ENDS_WITH; }
816 |
817 <STAR> <EQUAL> { op=Condition.Op.CONTAINS; }
818 )
819 s()
820 ( <STAR> { considerValAsKey=true; } )?
821 (
822 LOOKAHEAD(2)
823 i=int_() { val=Integer.toString(i); }
824 |
825 f=float_() { val=Float.toString(f); }
826 |
827 val=string_or_ident()
828 )
829 |
830 (
831 <GREATER_EQUAL> { op=Condition.Op.GREATER_OR_EQUAL; }
832 |
833 <GREATER> { op=Condition.Op.GREATER; }
834 |
835 <LESS_EQUAL> { op=Condition.Op.LESS_OR_EQUAL; }
836 |
837 <LESS> { op=Condition.Op.LESS; }
838 )
839 s()
840 f=float_() { val=Float.toString(f); }
841 )
842 { return Condition.KeyMatchType.REGEX == matchType
843 ? Condition.createRegexpKeyRegexpValueCondition(key, val, op)
844 : Condition.createKeyValueCondition(key, val, op, context, considerValAsKey); }
845}
846
847Condition class_or_pseudoclass(Context context) :
848{
849 String s;
850 boolean not = false;
851 boolean pseudo;
852}
853{
854 ( <EXCLAMATION> { not = true; } )?
855 (
856 <FULLSTOP> { pseudo = false; }
857 |
858 <COLON> { pseudo = true; }
859 )
860 s=ident()
861 { return pseudo
862 ? Condition.createPseudoClassCondition(s, not, context)
863 : Condition.createClassCondition(s, not, context); }
864}
865
866Subpart subpart() :
867{
868 String s;
869 Expression e;
870}
871{
872 <DCOLON>
873 (
874 s=ident() { return new Subpart.StringSubpart(s); }
875 |
876 <STAR> { return new Subpart.StringSubpart("*"); }
877 |
878 <LPAR> e=expression() <RPAR> { return new Subpart.ExpressionSubpart(e); }
879 )
880}
881
882Declaration declaration() :
883{
884 List<Instruction> ins = new ArrayList<Instruction>();
885 Instruction i;
886 Token key;
887 Object val = null;
888}
889{
890 <LBRACE> w()
891 (
892 (
893 <SET> w()
894 (<FULLSTOP>)? // specification allows "set .class" to set "class". we also support "set class"
895 key=<IDENT> w()
896 ( <EQUAL> val=expression() )?
897 { ins.add(new Instruction.AssignmentInstruction(key.image, val == null ? true : val, true)); }
898 ( <RBRACE> { return new Declaration(ins, declarationCounter++); } | <SEMICOLON> w() )
899 )
900 |
901 key=<IDENT> w() <COLON> w()
902 (
903 LOOKAHEAD( float_array() w() ( <SEMICOLON> | <RBRACE> ) )
904 val=float_array()
905 { ins.add(new Instruction.AssignmentInstruction(key.image, val, false)); }
906 w()
907 ( <RBRACE> { return new Declaration(ins, declarationCounter++); } | <SEMICOLON> w() )
908 |
909 LOOKAHEAD( expression() ( <SEMICOLON> | <RBRACE> ) )
910 val=expression()
911 { ins.add(new Instruction.AssignmentInstruction(key.image, val, false)); }
912 ( <RBRACE> { return new Declaration(ins, declarationCounter++); } | <SEMICOLON> w() )
913 |
914 val=readRaw() w() { ins.add(new Instruction.AssignmentInstruction(key.image, val, false)); }
915 )
916 )*
917 <RBRACE>
918 { return new Declaration(ins, declarationCounter++); }
919}
920
921/**
922 * General expression.
923 * Separate production rule for each level of operator precedence (recursive descent).
924 */
925Expression expression() :
926{
927 Expression e;
928}
929{
930 e=conditional_expression()
931 {
932 return e;
933 }
934}
935
936Expression conditional_expression() :
937{
938 Expression e, e1, e2;
939 String op = null;
940}
941{
942 e=or_expression()
943 (
944 <QUESTION> w()
945 e1=conditional_expression()
946 <COLON> w()
947 e2=conditional_expression()
948 {
949 e = ExpressionFactory.createFunctionExpression("cond", Arrays.asList(e, e1, e2));
950 }
951 )?
952 {
953 return e;
954 }
955}
956
957Expression or_expression() :
958{
959 Expression e, e2;
960 String op = null;
961}
962{
963 e=and_expression()
964 (
965 <PIPE> <PIPE> w()
966 e2=and_expression()
967 {
968 e = ExpressionFactory.createFunctionExpression("or", Arrays.asList(e, e2));
969 }
970 )*
971 {
972 return e;
973 }
974}
975
976Expression and_expression() :
977{
978 Expression e, e2;
979 String op = null;
980}
981{
982 e=relational_expression()
983 (
984 <AMPERSAND> <AMPERSAND> w()
985 e2=relational_expression()
986 {
987 e = ExpressionFactory.createFunctionExpression("and", Arrays.asList(e, e2));
988 }
989 )*
990 {
991 return e;
992 }
993}
994
995Expression relational_expression() :
996{
997 Expression e, e2;
998 String op = null;
999}
1000{
1001 e=additive_expression()
1002 (
1003 (
1004 <GREATER_EQUAL> { op = "greater_equal"; }
1005 |
1006 <LESS_EQUAL> { op = "less_equal"; }
1007 |
1008 <GREATER> { op = "greater"; }
1009 |
1010 <LESS> { op = "less"; }
1011 |
1012 <EQUAL> ( <EQUAL> )? { op = "equal"; }
1013 |
1014 <EXCLAMATION> <EQUAL> { op = "not_equal"; }
1015 ) w()
1016 e2=additive_expression()
1017 {
1018 e = ExpressionFactory.createFunctionExpression(op, Arrays.asList(e, e2));
1019 }
1020 )?
1021 {
1022 return e;
1023 }
1024}
1025
1026Expression additive_expression() :
1027{
1028 Expression e, e2;
1029 String op = null;
1030}
1031{
1032 e=multiplicative_expression()
1033 (
1034 ( <PLUS> { op = "plus"; } | <MINUS> { op = "minus"; } ) w()
1035 e2=multiplicative_expression()
1036 {
1037 e = ExpressionFactory.createFunctionExpression(op, Arrays.asList(e, e2));
1038 }
1039 )*
1040 {
1041 return e;
1042 }
1043}
1044
1045Expression multiplicative_expression() :
1046{
1047 Expression e, e2;
1048 String op = null;
1049}
1050{
1051 e=unary_expression()
1052 (
1053 ( <STAR> { op = "times"; } | <SLASH> { op = "divided_by"; } ) w()
1054 e2=unary_expression()
1055 {
1056 e = ExpressionFactory.createFunctionExpression(op, Arrays.asList(e, e2));
1057 }
1058 )*
1059 {
1060 return e;
1061 }
1062}
1063
1064Expression unary_expression() :
1065{
1066 Expression e;
1067 String op = null;
1068}
1069{
1070 (
1071 <MINUS> { op = "minus"; } w()
1072 |
1073 <EXCLAMATION> { op = "not"; } w()
1074 )?
1075 e=primary() w()
1076 {
1077 if (op == null)
1078 return e;
1079 return ExpressionFactory.createFunctionExpression(op, Collections.singletonList(e));
1080 }
1081}
1082
1083Expression primary() :
1084{
1085 Expression nested;
1086 Expression fn;
1087 Object lit;
1088}
1089{
1090 LOOKAHEAD(3) // both function and identifier start with an identifier (+ optional whitespace)
1091 fn=function() { return fn; }
1092 |
1093 lit=literal()
1094 {
1095 if (lit == null)
1096 return NullExpression.INSTANCE;
1097 return new LiteralExpression(lit);
1098 }
1099 |
1100 <LPAR> w() nested=expression() <RPAR> { return nested; }
1101}
1102
1103Expression function() :
1104{
1105 Expression arg;
1106 String name;
1107 List<Expression> args = new ArrayList<Expression>();
1108}
1109{
1110 name=ident() w()
1111 <LPAR> w()
1112 (
1113 arg=expression() { args.add(arg); }
1114 ( <COMMA> w() arg=expression() { args.add(arg); } )*
1115 )?
1116 <RPAR>
1117 { return ExpressionFactory.createFunctionExpression(name, args); }
1118}
1119
1120Object literal() :
1121{
1122 String val, pref;
1123 Token t;
1124 Float f;
1125}
1126{
1127 LOOKAHEAD(2)
1128 pref=ident() t=<HEXCOLOR>
1129 { return Main.pref.getColor("mappaint." + (sheet == null ? "MapCSS" : sheet.title) + "." + pref, ColorHelper.html2color(t.image)); }
1130 |
1131 t=<IDENT> { return new Keyword(t.image); }
1132 |
1133 val=string() { return val; }
1134 |
1135 <PLUS> f=ufloat() { return new Instruction.RelativeFloat(f); }
1136 |
1137 LOOKAHEAD(2)
1138 f=ufloat_unit() { return f; }
1139 |
1140 f=ufloat() { return f; }
1141 |
1142 t=<HEXCOLOR> { return ColorHelper.html2color(t.image); }
1143}
1144
1145/**
1146 * Number followed by a unit.
1147 *
1148 * Returns angles in radians and lengths in pixels.
1149 */
1150Float ufloat_unit() :
1151{
1152 float f;
1153 String u;
1154}
1155{
1156 f=ufloat() ( u=ident() | <DEG> { u = "°"; } | <PERCENT> { u = "%"; } )
1157 {
1158 Double m = unit_factor(u);
1159 if (m == null)
1160 return null;
1161 return (float) (f * m);
1162 }
1163}
1164
1165JAVACODE
1166private Double unit_factor(String unit) {
1167 switch (unit) {
1168 case "deg":
1169 case "°": return Math.PI / 180;
1170 case "rad": return 1.;
1171 case "grad": return Math.PI / 200;
1172 case "turn": return 2 * Math.PI;
1173 case "%": return 0.01;
1174 case "px": return 1.;
1175 case "cm": return 96/2.54;
1176 case "mm": return 9.6/2.54;
1177 case "in": return 96.;
1178 case "q": return 2.4/2.54;
1179 case "pc": return 16.;
1180 case "pt": return 96./72;
1181 default: return null;
1182 }
1183}
1184
1185JAVACODE
1186void error_skipto(int kind, MapCSSException me) {
1187 if (token.kind == EOF)
1188 throw new ParseException("Reached end of file while parsing");
1189
1190 Exception e = null;
1191 ParseException pe = generateParseException();
1192
1193 if (me != null) {
1194 final Token token = Utils.firstNonNull(pe.currentToken.next, pe.currentToken);
1195 me.setLine(token.beginLine);
1196 me.setColumn(token.beginColumn);
1197 e = me;
1198 } else {
1199 e = new ParseException(pe.getMessage()); // prevent memory leak
1200 }
1201
1202 Main.error("Skipping to the next rule, because of an error:");
1203 Main.error(e);
1204 if (sheet != null) {
1205 sheet.logError(e);
1206 }
1207 Token t;
1208 do {
1209 t = getNextToken();
1210 } while (t.kind != kind && t.kind != EOF);
1211 if (t.kind == EOF)
1212 throw new ParseException("Reached end of file while parsing");
1213}
1214
1215JAVACODE
1216/**
1217 * read everything to the next semicolon
1218 */
1219String readRaw() {
1220 Token t;
1221 StringBuilder s = new StringBuilder();
1222 while (true) {
1223 t = getNextToken();
1224 if ((t.kind == S || t.kind == STRING || t.kind == UNEXPECTED_CHAR) &&
1225 t.image.contains("\n")) {
1226 ParseException e = new ParseException(String.format("Warning: end of line while reading an unquoted string at line %s column %s.", t.beginLine, t.beginColumn));
1227 Main.error(e);
1228 if (sheet != null) {
1229 sheet.logError(e);
1230 }
1231 }
1232 if (t.kind == SEMICOLON || t.kind == EOF)
1233 break;
1234 s.append(t.image);
1235 }
1236 if (t.kind == EOF)
1237 throw new ParseException("Reached end of file while parsing");
1238 return s.toString();
1239}
1240
Note: See TracBrowser for help on using the repository browser.