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MapCSSParser.jj@ 8087

Last change on this file since 8087 was 8087, checked in by bastiK, 11 years ago

MapCSS: new @supports rule

Implementation should be mostly compatible with
the CSS Conditional 3 draft [2].

This is similar to @media, which was previously misused
for this purpose and is now deprecated.

refs:
[1] https://wiki.openstreetmap.org/wiki/MapCSS/0.2/Proposal_media_query
[2] http://dev.w3.org/csswg/css-conditional/

File size: 25.9 KB

Line
1	// License: GPL. For details, see LICENSE file.
2	options {
3	STATIC = false;
4	OUTPUT_DIRECTORY = "parsergen";
5	}
6
7	PARSER_BEGIN(MapCSSParser)
8	package org.openstreetmap.josm.gui.mappaint.mapcss.parsergen;
9
10	import java.io.InputStream;
11	import java.util.ArrayList;
12	import java.util.List;
13
14	import org.openstreetmap.josm.Main;
15	import org.openstreetmap.josm.gui.mappaint.Keyword;
16	import org.openstreetmap.josm.gui.mappaint.mapcss.Condition;
17	import org.openstreetmap.josm.gui.mappaint.mapcss.Condition.Context;
18	import org.openstreetmap.josm.gui.mappaint.mapcss.Expression;
19	import org.openstreetmap.josm.gui.mappaint.mapcss.ExpressionFactory;
20	import org.openstreetmap.josm.gui.mappaint.mapcss.Instruction;
21	import org.openstreetmap.josm.gui.mappaint.mapcss.LiteralExpression;
22	import org.openstreetmap.josm.gui.mappaint.mapcss.MapCSSException;
23	import org.openstreetmap.josm.gui.mappaint.mapcss.MapCSSRule;
24	import org.openstreetmap.josm.gui.mappaint.mapcss.MapCSSRule.Declaration;
25	import org.openstreetmap.josm.gui.mappaint.mapcss.MapCSSStyleSource;
26	import org.openstreetmap.josm.gui.mappaint.mapcss.Selector;
27	import org.openstreetmap.josm.gui.mappaint.mapcss.Selector.ChildOrParentSelector;
28	import org.openstreetmap.josm.gui.mappaint.mapcss.Selector.GeneralSelector;
29	import org.openstreetmap.josm.gui.mappaint.mapcss.Selector.LinkSelector;
30	import org.openstreetmap.josm.gui.mappaint.mapcss.Subpart;
31	import org.openstreetmap.josm.tools.ColorHelper;
32	import org.openstreetmap.josm.tools.Pair;
33
34	/**
35	* MapCSS parser.
36	*
37	* Contains two independent grammars:
38	* (a) the preprocessor and (b) the main mapcss parser.
39	*
40	* The preprocessor handles @supports and @media syntax (@media is deprecated).
41	* Basically this allows to write one style for different versions of JOSM (or different editors).
42	* When the @supports condition is not fulfilled, it should simply skip over
43	* the whole section and not attempt to parse the possibly unknown
44	* grammar. It preserves whitespace and comments, in order to keep the
45	* line and column numbers in the error messages correct for the second pass.
46	*
47	*/
48
49	public class MapCSSParser {
50	MapCSSStyleSource sheet;
51	StringBuilder sb;
52	int declarationCounter;
53
54	/**
55	* Nicer way to refer to a lexical state.
56	*/
57	public static enum LexicalState {
58	PREPROCESSOR(0), /* the preprocessor */
59	DEFAULT(2); /* the main parser */
60
61	int idx; // the integer, which javacc assigns to this state
62
63	LexicalState(int idx) {
64	if (!this.name().equals(MapCSSParserTokenManager.lexStateNames[idx])) {
65	throw new RuntimeException();
66	}
67	this.idx = idx;
68	}
69	};
70
71	/**
72	* Constructor which initializes the parser with a certain lexical state.
73	*/
74	public MapCSSParser(InputStream in, String encoding, LexicalState initState) {
75	this(createTokenManager(in, encoding, initState));
76	declarationCounter = 0;
77	}
78
79	protected static MapCSSParserTokenManager createTokenManager(InputStream in, String encoding, LexicalState initState) {
80	SimpleCharStream scs;
81	try {
82	scs = new SimpleCharStream(in, encoding, 1, 1);
83	} catch(java.io.UnsupportedEncodingException e) {
84	throw new RuntimeException(e);
85	}
86	return new MapCSSParserTokenManager(scs, initState.idx);
87	}
88	}
89	PARSER_END(MapCSSParser)
90
91	/*************
92	* Token definitions
93	*
94	* Lexical states for the preprocessor: <PREPROCESSOR>, <PP_COMMENT>
95	* Lexical states for the main parser: <DEFAULT>, <COMMENT>
96	*/
97
98	<PREPROCESSOR>
99	TOKEN:
100	{
101	< PP_AND: "and" >
102	\| < PP_OR: "or" >
103	\| < PP_NOT: "not" >
104	\| < PP_SUPPORTS: "@supports" >
105	\| < PP_MEDIA: "@media" >
106	\| < PP_NEWLINECHAR: "\n" \| "\r" \| "\f" >
107	\| < PP_WHITESPACE: " " \| "\t" >
108	\| < PP_COMMENT_START: "/*" > : PP_COMMENT
109	}
110
111	<PP_COMMENT>
112	TOKEN:
113	{
114	< PP_COMMENT_END: "*/" > : PREPROCESSOR
115	}
116
117	<PP_COMMENT>
118	MORE:
119	{
120	< ~[] >
121	}
122
123	<DEFAULT>
124	TOKEN [IGNORE_CASE]:
125	{
126	/* Special keyword in some contexts, ordinary identifier in other contexts.
127	Use the parsing rule <code>ident()</code> to refer to a general
128	identifier, including "set". */
129	< SET: "set" >
130	}
131
132	<DEFAULT,PREPROCESSOR>
133	TOKEN:
134	{
135	< IDENT: ["a"-"z","A"-"Z","_"] ( ["a"-"z","A"-"Z","_","-","0"-"9"] )* >
136	\| < UINT: ["1"-"9"] ( ["0"-"9"] )* >
137	\| < STRING: "\"" ( [" ","!","#"-"[","]"-"~","\u0080"-"\uFFFF"] \| "\\\"" \| "\\\\" )* "\"" >
138	\| < #PREDEFINED: "\\" ["d","D","s","S","w","W","b","B","A","G","Z","z"] >
139	\| < #REGEX_CHAR_WITHOUT_STAR: [" "-")","+"-".","0"-"[","]"-"~","\u0080"-"\uFFFF"] \| "\\/" \| "\\\\" \| "\\[" \| "\\]" \| "\\+" \| "\\." \| "\\'" \| "\\\"" \| "\$" \| "\$" \|<PREDEFINED> >
140	\| < REGEX: "/" <REGEX_CHAR_WITHOUT_STAR> ( <REGEX_CHAR_WITHOUT_STAR> \| "" ) "/" >
141	\| < LBRACE: "{" >
142	\| < RBRACE: "}" >
143	\| < LPAR: "(" >
144	\| < RPAR: ")" >
145	\| < COMMA: "," >
146	\| < COLON: ":" >
147	}
148
149	<PREPROCESSOR>
150	TOKEN:
151	{
152	< PP_SOMETHING_ELSE : ~[] >
153	}
154
155	<DEFAULT>
156	TOKEN:
157	{
158	< UFLOAT: ( ["0"-"9"] )+ ( "." ( ["0"-"9"] )+ )? >
159	\| < #H: ["0"-"9","a"-"f","A"-"F"] >
160	\| < HEXCOLOR: "#" ( <H><H><H><H><H><H><H><H> \| <H><H><H><H><H><H> \| <H><H><H> ) >
161	\| < S: ( " " \| "\t" \| "\n" \| "\r" \| "\f" )+ >
162	\| < STAR: "*" >
163	\| < SLASH: "/" >
164	\| < LSQUARE: "[" >
165	\| < RSQUARE: "]" >
166	\| < GREATER_EQUAL: ">=" >
167	\| < LESS_EQUAL: "<=" >
168	\| < GREATER: ">" >
169	\| < LESS: "<" >
170	\| < EQUAL: "=" >
171	\| < EXCLAMATION: "!" >
172	\| < TILDE: "~" >
173	\| < DCOLON: "::" >
174	\| < SEMICOLON: ";" >
175	\| < PIPE: "\|" >
176	\| < PIPE_Z: "\|z" >
177	\| < PLUS: "+" >
178	\| < MINUS: "-" >
179	\| < AMPERSAND: "&" >
180	\| < QUESTION: "?" >
181	\| < DOLLAR: "$" >
182	\| < CARET: "^" >
183	\| < FULLSTOP: "." >
184	\| < ELEMENT_OF: "∈" >
185	\| < CROSSING: "⧉" >
186	\| < COMMENT_START: "/*" > : COMMENT
187	\| < UNEXPECTED_CHAR : ~[] > // avoid TokenMgrErrors because they are hard to recover from
188	}
189
190	<COMMENT>
191	TOKEN:
192	{
193	< COMMENT_END: "*/" > : DEFAULT
194	}
195
196	<COMMENT>
197	SKIP:
198	{
199	< ~[] >
200	}
201
202
203	/*************
204	*
205	* Preprocessor parser definitions:
206	*
207	* <pre>
208	*
209	* {@literal @media} { ... } queries are supported, following http://www.w3.org/TR/css3-mediaqueries/#syntax
210	*
211	* media_query
212	* ___________________________\|_______________________________
213	* \| \|
214	* {@literal @media} all and (min-josm-version: 7789) and (max-josm-version: 7790), all and (user-agent: xyz) { ... }
215	* \|______________________\|
216	* \|
217	* media_expression
218	* </pre>
219	*/
220
221
222	/**
223	* root method for the preprocessor.
224	*/
225	String pp_root(MapCSSStyleSource sheet):
226	{
227	}
228	{
229	{ sb = new StringBuilder(); this.sheet = sheet; }
230	pp_black_box(true) <EOF>
231	{ return sb.toString(); }
232	}
233
234	/**
235	* Parse any unknown grammar (black box).
236	*
237	* Only stop when "@media" is encountered and keep track of correct number of
238	* opening and closing curly brackets.
239	*
240	* @param write false if this content should be skipped (@pp_media condition is not fulfilled), true otherwise
241	*/
242	void pp_black_box(boolean write):
243	{
244	Token t;
245	}
246	{
247	(
248	(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); }
249	\|
250	pp_w1()
251	\|
252	pp_supports(!write)
253	\|
254	pp_media(!write)
255	\|
256	t=<LBRACE> { if (write) sb.append(t.image); } pp_black_box(write) t=<RBRACE> { if (write) sb.append(t.image); }
257	)*
258	}
259
260	/**
261	* Parses an @supports rule.
262	*
263	* @param ignore if the content of this rule should be ignored
264	* (because we are already inside a @supports block that didn't pass)
265	*/
266	void pp_supports(boolean ignore):
267	{
268	boolean pass;
269	}
270	{
271	<PP_SUPPORTS> pp_w()
272	pass=pp_supports_condition()
273	<LBRACE>
274	pp_black_box(pass && !ignore)
275	<RBRACE>
276	}
277
278	/**
279	* Parses the condition of the @supports rule.
280	*
281	* Unlike other parsing rules, grabs trailing whitespace.
282	* @return true, if the condition is fulfilled
283	*/
284	boolean pp_supports_condition():
285	{
286	boolean pass;
287	boolean q;
288	}
289	{
290	(
291	<PP_NOT> pp_w() q=pp_supports_condition_in_parens() { pass = !q; } pp_w()
292	\|
293	LOOKAHEAD(pp_supports_condition_in_parens() pp_w() <PP_AND>)
294	pass=pp_supports_condition_in_parens() pp_w()
295	( <PP_AND> pp_w() q=pp_supports_condition_in_parens() { pass = pass && q; } pp_w() )+
296	\|
297	LOOKAHEAD(pp_supports_condition_in_parens() pp_w() <PP_OR>)
298	pass=pp_supports_condition_in_parens() pp_w()
299	( <PP_OR> pp_w() q=pp_supports_condition_in_parens() { pass = pass \|\| q; } pp_w() )+
300	\|
301	pass=pp_supports_condition_in_parens() pp_w()
302	)
303	{ return pass; }
304	}
305
306	/**
307	* Parses something in parenthesis inside the condition of the @supports rule.
308	*
309	* @return true, if the condition is fulfilled
310	*/
311	boolean pp_supports_condition_in_parens():
312	{
313	boolean pass;
314	}
315	{
316	(
317	LOOKAHEAD(pp_supports_declaration_condition())
318	pass=pp_supports_declaration_condition()
319	\|
320	<LPAR> pp_w() pass=pp_supports_condition() <RPAR>
321	)
322	{ return pass; }
323	}
324
325	/**
326	* Parse an @supports declaration condition, e. g. a single (key:value) or (key) statement.
327	*
328	* The parsing rule {@link #literal()} from the main mapcss parser is reused here.
329	*
330	* @return true if the condition is fulfilled
331	*/
332	boolean pp_supports_declaration_condition():
333	{
334	Token t;
335	String feature;
336	Object val = null;
337	}
338	{
339	<LPAR> pp_w() t=<IDENT> { feature = t.image; } pp_w() ( <COLON> pp_w() val=literal() )? <RPAR>
340	{ return this.sheet.evalSupportsDeclCondition(feature, val); }
341	}
342
343	// deprecated
344	void pp_media(boolean ignore):
345	{
346	boolean pass = false;
347	boolean q;
348	boolean empty = true;
349	}
350	{
351	<PP_MEDIA> pp_w()
352	( q=pp_media_query() { pass = pass \|\| q; empty = false; }
353	( <COMMA> pp_w() q=pp_media_query() { pass = pass \|\| q; } )*
354	)?
355	<LBRACE>
356	pp_black_box((empty \|\| pass) && !ignore)
357	<RBRACE>
358	}
359
360	// deprecated
361	boolean pp_media_query():
362	{
363	Token t;
364	String mediatype = "all";
365	boolean pass = true;
366	boolean invert = false;
367	boolean e;
368	}
369	{
370	( <PP_NOT> { invert = true; } pp_w() )?
371	(
372	t=<IDENT> { mediatype = t.image.toLowerCase(); } pp_w()
373	( <PP_AND> pp_w() e=pp_media_expression() { pass = pass && e; } pp_w() )*
374	\|
375	e=pp_media_expression() { pass = pass && e; } pp_w()
376	( <PP_AND> pp_w() e=pp_media_expression() { pass = pass && e; } pp_w() )*
377	)
378	{
379	if (!"all".equals(mediatype)) {
380	pass = false;
381	}
382	return invert ? (!pass) : pass;
383	}
384	}
385
386	/**
387	* Parse an @media expression.
388	*
389	* The parsing rule {@link #literal()} from the main mapcss parser is reused here.
390	*
391	* @return true if the condition is fulfilled
392	*/
393	// deprecated
394	boolean pp_media_expression():
395	{
396	Token t;
397	String feature;
398	Object val = null;
399	}
400	{
401	<LPAR> pp_w() t=<IDENT> { feature = t.image; } pp_w() ( <COLON> pp_w() val=literal() )? <RPAR>
402	{ return this.sheet.evalSupportsDeclCondition(feature, val); }
403	}
404
405	void pp_w1():
406	{
407	Token t;
408	}
409	{
410	t=<PP_NEWLINECHAR> { sb.append(t.image); }
411	\|
412	t=<PP_WHITESPACE> { sb.append(t.image); }
413	\|
414	t=<PP_COMMENT_START> { sb.append(t.image); } t=<PP_COMMENT_END> { sb.append(t.image); }
415	}
416
417	void pp_w():
418	{
419	}
420	{
421	( pp_w1() )*
422	}
423
424	/*************
425	*
426	* Parser definition for the main MapCSS parser:
427	*
428	* <pre>
429	*
430	* rule
431	* _______________________\|______________________________
432	* \| \|
433	* selector declaration
434	* _________\|___________________ _________\|____________
435	* \| \| \| \|
436	*
437	* way\|z11-12[highway=residential] { color: red; width: 3 }
438	*
439	* \|_____\|\|___________________\| \|_________\|
440	* \| \| \|
441	* zoom condition instruction
442	*
443	* more general:
444	*
445	* way\|z13-[a=b][c=d]::subpart, way\|z-3[u=v]:closed::subpart2 { p1 : val; p2 : val; }
446	*
447	* 'val' can be a literal, or an expression like "prop(width, default) + 0.8".
448	*
449	* </pre>
450	*/
451
452	int uint() :
453	{
454	Token i;
455	}
456	{
457	i=<UINT> { return Integer.parseInt(i.image); }
458	}
459
460	int int_() :
461	{
462	int i;
463	}
464	{
465	<MINUS> i=uint() { return -i; } \| i=uint() { return i; }
466	}
467
468	float ufloat() :
469	{
470	Token f;
471	}
472	{
473	( f=<UFLOAT> \| f=<UINT> )
474	{ return Float.parseFloat(f.image); }
475	}
476
477	float float_() :
478	{
479	float f;
480	}
481	{
482	<MINUS> f=ufloat() { return -f; } \| f=ufloat() { return f; }
483	}
484
485	String string() :
486	{
487	Token t;
488	}
489	{
490	t=<STRING>
491	{ return t.image.substring(1, t.image.length() - 1).replace("\\\"", "\"").replace("\\\\", "\\"); }
492	}
493
494	String ident():
495	{
496	Token t;
497	String s;
498	}
499	{
500	( t=<IDENT> \| t=<SET> ) { return t.image; }
501	}
502
503	String string_or_ident() :
504	{
505	Token t;
506	String s;
507	}
508	{
509	( s=ident() \| s=string() ) { return s; }
510	}
511
512	String regex() :
513	{
514	Token t;
515	}
516	{
517	t=<REGEX>
518	{ return t.image.substring(1, t.image.length() - 1); }
519	}
520
521	/**
522	* white-space
523	*/
524	void s() :
525	{
526	}
527	{
528	( <S> )?
529	}
530
531	/**
532	* mix of white-space and comments
533	*/
534	void w() :
535	{
536	}
537	{
538	( <S> \| <COMMENT_START> <COMMENT_END> )*
539	}
540
541	/**
542	* comma delimited list of floats (at least 2, all >= 0)
543	*/
544	List<Float> float_array() :
545	{
546	float f;
547	List<Float> fs = new ArrayList<Float>();
548	}
549	{
550	f=ufloat() { fs.add(f); }
551	(
552	<COMMA> s()
553	f=ufloat() { fs.add(f); }
554	)+
555	{
556	return fs;
557	}
558	}
559
560	/**
561	* entry point for the main parser
562	*/
563	void sheet(MapCSSStyleSource sheet):
564	{
565	}
566	{
567	{ this.sheet = sheet; }
568	w()
569	(
570	try {
571	rule() w()
572	} catch (MapCSSException mex) {
573	error_skipto(RBRACE, mex);
574	w();
575	} catch (ParseException ex) {
576	error_skipto(RBRACE, null);
577	w();
578	}
579	)*
580	<EOF>
581	}
582
583	void rule():
584	{
585	List<Selector> selectors = new ArrayList<Selector>();
586	Selector sel;
587	Declaration decl;
588	}
589	{
590	sel=child_selector() { selectors.add(sel); }
591	(
592	<COMMA> w()
593	sel=child_selector() { selectors.add(sel); }
594	)*
595	decl=declaration()
596	{
597	for (Selector s : selectors) {
598	sheet.rules.add(new MapCSSRule(s, decl));
599	}
600	}
601	}
602
603	Selector child_selector() :
604	{
605	Selector.ChildOrParentSelectorType type = null;
606	Condition c;
607	List<Condition> conditions = new ArrayList<Condition>();
608	Selector selLeft;
609	LinkSelector selLink = null;
610	Selector selRight = null;
611	}
612	{
613	selLeft=selector() w()
614	(
615	(
616	(
617	(
618	<GREATER> { type = Selector.ChildOrParentSelectorType.CHILD; }
619	\|
620	<LESS> { type = Selector.ChildOrParentSelectorType.PARENT; }
621	\|
622	<PLUS> { type = Selector.ChildOrParentSelectorType.SIBLING; }
623	)
624	( ( c=condition(Context.LINK) \| c=class_or_pseudoclass(Context.LINK) ) { conditions.add(c); } )*
625	\|
626	<ELEMENT_OF> { type = Selector.ChildOrParentSelectorType.ELEMENT_OF; }
627	\|
628	<CROSSING> { type = Selector.ChildOrParentSelectorType.CROSSING; }
629	)
630	w()
631	\|
632	{ /* <GREATER> is optional for child selector */ type = Selector.ChildOrParentSelectorType.CHILD; }
633	)
634	{ selLink = new LinkSelector(conditions); }
635	selRight=selector() w()
636	)?
637	{ return selRight != null ? new ChildOrParentSelector(selLeft, selLink, selRight, type) : selLeft; }
638	}
639
640	Selector selector() :
641	{
642	Token base;
643	Condition c;
644	Pair<Integer, Integer> r = null;
645	List<Condition> conditions = new ArrayList<Condition>();
646	Subpart sub = null;
647	}
648	{
649	( base=<IDENT> \| base=<STAR> )
650	( r=zoom() )?
651	( ( c=condition(Context.PRIMITIVE) \| c=class_or_pseudoclass(Context.PRIMITIVE) ) { conditions.add(c); } )*
652	( sub=subpart() )?
653	{ return new GeneralSelector(base.image, r, conditions, sub); }
654	}
655
656	Pair<Integer, Integer> zoom() :
657	{
658	Integer min = 0;
659	Integer max = Integer.MAX_VALUE;
660	}
661	{
662	<PIPE_Z>
663	(
664	<MINUS> max=uint()
665	\|
666	LOOKAHEAD(2)
667	min=uint() <MINUS> ( max=uint() )?
668	\|
669	min=uint() { max = min; }
670	)
671	{ return new Pair<Integer, Integer>(min, max); }
672	}
673
674	Condition condition(Context context) :
675	{
676	Condition c;
677	Expression e;
678	}
679	{
680	<LSQUARE> s()
681	(
682	LOOKAHEAD( simple_key_condition(context) s() <RSQUARE> )
683	c=simple_key_condition(context) s() <RSQUARE> { return c; }
684	\|
685	LOOKAHEAD( simple_key_value_condition(context) s() <RSQUARE> )
686	c=simple_key_value_condition(context) s() <RSQUARE> { return c; }
687	\|
688	e=expression() <RSQUARE> { return Condition.createExpressionCondition(e, context); }
689	)
690	}
691
692	String tag_key() :
693	{
694	String s, s2;
695	Token t;
696	}
697	{
698	s=string() { return s; }
699	\|
700	s=ident() ( <COLON> s2=ident() { s += ':' + s2; } )* { return s; }
701	}
702
703	Condition simple_key_condition(Context context) :
704	{
705	boolean not = false;
706	Condition.KeyMatchType matchType = null;;
707	String key;
708	}
709	{
710	( <EXCLAMATION> { not = true; } )?
711	(
712	{ matchType = Condition.KeyMatchType.REGEX; } key = regex()
713	\|
714	key = tag_key()
715	)
716	( LOOKAHEAD(2) <QUESTION> <EXCLAMATION> { matchType = Condition.KeyMatchType.FALSE; } )?
717	( <QUESTION> { matchType = Condition.KeyMatchType.TRUE; } )?
718	{ return Condition.createKeyCondition(key, not, matchType, context); }
719	}
720
721	Condition simple_key_value_condition(Context context) :
722	{
723	String key;
724	String val;
725	float f;
726	int i;
727	Condition.Op op;
728	boolean considerValAsKey = false;
729	}
730	{
731	key=tag_key() s()
732	(
733	LOOKAHEAD(3)
734	(
735	<EQUAL> <TILDE> { op=Condition.Op.REGEX; }
736	\|
737	<EXCLAMATION> <TILDE> { op=Condition.Op.NREGEX; }
738	)
739	s()
740	( <STAR> { considerValAsKey=true; } )?
741	val=regex()
742	\|
743	(
744	<EXCLAMATION> <EQUAL> { op=Condition.Op.NEQ; }
745	\|
746	<EQUAL> { op=Condition.Op.EQ; }
747	\|
748	<TILDE> <EQUAL> { op=Condition.Op.ONE_OF; }
749	\|
750	<CARET> <EQUAL> { op=Condition.Op.BEGINS_WITH; }
751	\|
752	<DOLLAR> <EQUAL> { op=Condition.Op.ENDS_WITH; }
753	\|
754	<STAR> <EQUAL> { op=Condition.Op.CONTAINS; }
755	)
756	s()
757	( <STAR> { considerValAsKey=true; } )?
758	(
759	LOOKAHEAD(2)
760	i=int_() { val=Integer.toString(i); }
761	\|
762	f=float_() { val=Float.toString(f); }
763	\|
764	val=string_or_ident()
765	)
766	\|
767	(
768	<GREATER_EQUAL> { op=Condition.Op.GREATER_OR_EQUAL; }
769	\|
770	<GREATER> { op=Condition.Op.GREATER; }
771	\|
772	<LESS_EQUAL> { op=Condition.Op.LESS_OR_EQUAL; }
773	\|
774	<LESS> { op=Condition.Op.LESS; }
775	)
776	s()
777	f=float_() { val=Float.toString(f); }
778	)
779	{ return Condition.createKeyValueCondition(key, val, op, context, considerValAsKey); }
780	}
781
782	Condition class_or_pseudoclass(Context context) :
783	{
784	String s;
785	boolean not = false;
786	boolean pseudo;
787	}
788	{
789	( <EXCLAMATION> { not = true; } )?
790	(
791	<FULLSTOP> { pseudo = false; }
792	\|
793	<COLON> { pseudo = true; }
794	)
795	s=ident()
796	{ return pseudo
797	? Condition.createPseudoClassCondition(s, not, context)
798	: Condition.createClassCondition(s, not, context); }
799	}
800
801	Subpart subpart() :
802	{
803	String s;
804	Expression e;
805	}
806	{
807	<DCOLON>
808	(
809	s=ident() { return new Subpart.StringSubpart(s); }
810	\|
811	<STAR> { return new Subpart.StringSubpart("*"); }
812	\|
813	<LPAR> e=expression() <RPAR> { return new Subpart.ExpressionSubpart(e); }
814	)
815	}
816
817	Declaration declaration() :
818	{
819	List<Instruction> ins = new ArrayList<Instruction>();
820	Instruction i;
821	Token key;
822	Object val = null;
823	}
824	{
825	<LBRACE> w()
826	(
827	(
828	<SET> w()
829	(<FULLSTOP>)? // specification allows "set .class" to set "class". we also support "set class"
830	key=<IDENT> w()
831	( <EQUAL> val=expression() )?
832	{ ins.add(new Instruction.AssignmentInstruction(key.image, val == null ? true : val, true)); }
833	( <RBRACE> { return new Declaration(ins, declarationCounter++); } \| <SEMICOLON> w() )
834	)
835	\|
836	key=<IDENT> w() <COLON> w()
837	(
838	LOOKAHEAD( float_array() w() ( <SEMICOLON> \| <RBRACE> ) )
839	val=float_array()
840	{ ins.add(new Instruction.AssignmentInstruction(key.image, val, false)); }
841	w()
842	( <RBRACE> { return new Declaration(ins, declarationCounter++); } \| <SEMICOLON> w() )
843	\|
844	LOOKAHEAD( expression() ( <SEMICOLON> \| <RBRACE> ) )
845	val=expression()
846	{ ins.add(new Instruction.AssignmentInstruction(key.image, val, false)); }
847	( <RBRACE> { return new Declaration(ins, declarationCounter++); } \| <SEMICOLON> w() )
848	\|
849	val=readRaw() w() { ins.add(new Instruction.AssignmentInstruction(key.image, val, false)); }
850	)
851	)*
852	<RBRACE>
853	{ return new Declaration(ins, declarationCounter++); }
854	}
855
856	Expression expression():
857	{
858	List<Expression> args = new ArrayList<Expression>();
859	Expression e;
860	String op = null;
861	}
862	{
863	(
864	<EXCLAMATION> { op = "not"; } w() e=primary() { args.add(e); } w()
865	\|
866	<MINUS> { op = "minus"; } w() e=primary() { args.add(e); } w()
867	\|
868
869	(
870	e=primary() { args.add(e); } w()
871	(
872	( <PLUS> { op = "plus"; } w() e=primary() { args.add(e); } w() )+
873	\|
874	( <STAR> { op = "times"; } w() e=primary() { args.add(e); } w() )+
875	\|
876	( <MINUS> { op = "minus"; } w() e=primary() { args.add(e); } w() )+
877	\|
878	( <SLASH> { op = "divided_by"; } w() e=primary() { args.add(e); } w() )+
879	\|
880	<GREATER_EQUAL> { op = "greater_equal"; } w() e=primary() { args.add(e); } w()
881	\|
882	<LESS_EQUAL> { op = "less_equal"; } w() e=primary() { args.add(e); } w()
883	\|
884	<GREATER> { op = "greater"; } w() e=primary() { args.add(e); } w()
885	\|
886	<EQUAL> ( <EQUAL> )? { op = "equal"; } w() e=primary() { args.add(e); } w()
887	\|
888	<LESS> { op = "less"; } w() e=primary() { args.add(e); } w()
889	\|
890	<AMPERSAND> <AMPERSAND> { op = "and"; } w() e=primary() { args.add(e); } w()
891	\|
892	<PIPE> <PIPE> { op = "or"; } w() e=primary() { args.add(e); } w()
893	\|
894	<QUESTION> { op = "cond"; } w() e=primary() { args.add(e); } w() <COLON> w() e=primary() { args.add(e); } w()
895	)?
896	)
897	)
898	{
899	if (op == null)
900	return args.get(0);
901	return ExpressionFactory.createFunctionExpression(op, args);
902	}
903	}
904
905	Expression primary() :
906	{
907	Expression nested;
908	Expression fn;
909	Object lit;
910	}
911	{
912	LOOKAHEAD(3) // both function and identifier start with an identifier (+ optional whitespace)
913	fn=function() { return fn; }
914	\|
915	lit=literal() { return new LiteralExpression(lit); }
916	\|
917	<LPAR> w() nested=expression() <RPAR> { return nested; }
918	}
919
920	Expression function() :
921	{
922	Expression arg;
923	String name;
924	List<Expression> args = new ArrayList<Expression>();
925	}
926	{
927	name=ident() w()
928	<LPAR> w()
929	(
930	arg=expression() { args.add(arg); }
931	( <COMMA> w() arg=expression() { args.add(arg); } )*
932	)?
933	<RPAR>
934	{ return ExpressionFactory.createFunctionExpression(name, args); }
935	}
936
937	Object literal() :
938	{
939	String val, pref;
940	Token t;
941	float f;
942	}
943	{
944	LOOKAHEAD(2)
945	pref=ident() t=<HEXCOLOR>
946	{ return Main.pref.getColor("mappaint." + (sheet == null ? "MapCSS" : sheet.title) + "." + pref, ColorHelper.html2color(t.image)); }
947	\|
948	t=<IDENT> { return new Keyword(t.image); }
949	\|
950	val=string() { return val; }
951	\|
952	<PLUS> f=ufloat() { return new Instruction.RelativeFloat(f); }
953	\|
954	f=ufloat() { return f; }
955	\|
956	t=<HEXCOLOR> { return ColorHelper.html2color(t.image); }
957	}
958
959	JAVACODE
960	void error_skipto(int kind, MapCSSException me) {
961	if (token.kind == EOF)
962	throw new ParseException("Reached end of file while parsing");
963
964	Exception e = null;
965	ParseException pe = generateParseException();
966
967	if (me != null) {
968	me.setLine(pe.currentToken.next.beginLine);
969	me.setColumn(pe.currentToken.next.beginColumn);
970	e = me;
971	} else {
972	e = new ParseException(pe.getMessage()); // prevent memory leak
973	}
974
975	Main.error("Skipping to the next rule, because of an error:");
976	Main.error(e);
977	if (sheet != null) {
978	sheet.logError(e);
979	}
980	Token t;
981	do {
982	t = getNextToken();
983	} while (t.kind != kind && t.kind != EOF);
984	if (t.kind == EOF)
985	throw new ParseException("Reached end of file while parsing");
986	}
987
988	JAVACODE
989	/**
990	* read everything to the next semicolon
991	*/
992	String readRaw() {
993	Token t;
994	StringBuilder s = new StringBuilder();
995	while (true) {
996	t = getNextToken();
997	if ((t.kind == S \|\| t.kind == STRING \|\| t.kind == UNEXPECTED_CHAR) &&
998	t.image.contains("\n")) {
999	ParseException e = new ParseException(String.format("Warning: end of line while reading an unquoted string at line %s column %s.", t.beginLine, t.beginColumn));
1000	Main.error(e);
1001	if (sheet != null) {
1002	sheet.logError(e);
1003	}
1004	}
1005	if (t.kind == SEMICOLON \|\| t.kind == EOF)
1006	break;
1007	s.append(t.image);
1008	}
1009	if (t.kind == EOF)
1010	throw new ParseException("Reached end of file while parsing");
1011	return s.toString();
1012	}
1013

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