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// A complete lexer and grammar for CSS 2.1 as defined by the
// W3 specification. // // This grammar is free to use providing you retain everyhting in this header comment // section. // // Author : Jim Idle, Temporal Wave LLC. // Contact : jimi@temporal-wave.com // Website : http://www.temporal-wave.com // License : ANTLR Free BSD License // // Please visit our Web site at http://www.temporal-wave.com and try our commercial // parsers for SQL, C#, VB.Net and more. // // This grammar is free to use providing you retain everything in this header comment // section. // //Modifications to the original css21 source file by Jim Idle have been done to fulfill the //css3 parsing rules and making the parser more error prone. //1) incorporated the grammar changes from selectors module: http://www.w3.org/TR/css3-s // a. There's no 'universal' selector node, 'typeSelector' is used instead where instead of th // This solves the too long (==3) lookahead problem in the simpleSelectorSequence rule //2) implemented custom error recovery //3) removed whitespaces from the alpha token fragments // //Please be aware that the grammar doesn't properly and fully reflect the whole css3 specifica // The original CSS 2.1 grammar was downloaded from the antlr 3 grammars: // https://raw.githubusercontent.com/antlr/grammars-v3/62555b5befd6f89af05bf918b7 // Rebuild the lexer and parser: // 1. Update Css3.g // 2. Update the lexer/parser sources by running // ant generate-antlr-parser // from the module directory (ide/css.lib) // 3. Rerun unittests // 4. Commit Css3.g together with generated Css3Lexer.java and Css3Parser.java // // INFO: It is known, that the grammar does not compile without warnings // grammar Css3; //options { // k='*'; //} @header { /* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ // DO NOT EDIT THIS FILE MANUALLY! // SEE Css3.g FOR INSTRUCTIONS package org.netbeans.modules.css.lib; } @lexer::members { protected boolean isLessSource() { return false; } protected boolean isScssSource() { return false; } private boolean isCssPreprocessorSource() { return isLessSource() || isScssSource(); } } @members { protected boolean isLessSource() { return false; } protected boolean isScssSource() { return false; } private boolean isCssPreprocessorSource() { return isLessSource() || isScssSource(); } private boolean tokenNameEquals(String tokenImage) { return tokenImage.equalsIgnoreCase(input.LT(1).getText()); } private boolean tokenNameEquals2(String tokenImage) { return tokenImage.equalsIgnoreCase(input.LT(2).getText()); } private boolean tokenNameIs(String[] tokens) { for(String tokenImage : tokens) { if(tokenImage.equalsIgnoreCase(input.LT(1).getText())) { return true; } } return false; } private boolean tokenNameStartsWith(String prefix) { return input.LT(1).getText() != null && input.LT(1).getText().startsWith(prefix); } /** * Use the current stacked followset to work out the valid tokens that * can follow on from the current point in the parse, then recover by * eating tokens that are not a member of the follow set we compute. * * This method is used whenever we wish to force a sync, even though * the parser has not yet checked LA(1) for alt selection. This is useful * in situations where only a subset of tokens can begin a new construct * (such as the start of a new statement in a block) and we want to * proactively detect garbage so that the current rule does not exit on * on an exception. * * We could override recover() to make this the default behavior but that * is too much like using a sledge hammer to crack a nut. We want finer * grained control of the recovery and error mechanisms. */ protected void syncToSet() { // Compute the followset that is in context wherever we are in the // rule chain/stack // BitSet follow = state.following[state._fsp]; //computeContextSensitiveRuleFOLLOW(); syncToSet(follow); } protected void syncToSet(BitSet follow) { int mark = -1; //create error-recovery node dbg.enterRule(getGrammarFileName(), "recovery"); try { mark = input.mark(); // Consume all tokens in the stream until we find a member of the follow // set, which means the next production should be guaranteed to be happy. // while (! follow.member(input.LA(1)) ) { if (input.LA(1) == Token.EOF) { // Looks like we didn't find anything at all that can help us here // so we need to rewind to where we were and let normal error handling // bail out. // input.rewind(); mark = -1; return; } input.consume(); // Now here, because you are consuming some tokens, yu will probably want // to raise an error message such as "Spurious elements after the class member were discarded" // using whatever your override of displayRecognitionError() routine does to record // error messages. The exact error my depend on context etc. // } } catch (Exception e) { // Just ignore any errors here, we will just let the recognizer // try to resync as normal - something must be very screwed. // } finally { dbg.exitRule(getGrammarFileName(), "recovery"); // Always release the mark we took // if (mark != -1) { input.release(mark); } } } /** * synces to next RBRACE "}" taking nesting into account */ protected void syncToRBRACE(int nest) { int mark = -1; //create error-recovery node //dbg.enterRule(getGrammarFileName(), "recovery"); try { mark = input.mark(); for(;;) { //read char int c = input.LA(1); switch(c) { case Token.EOF: input.rewind(); mark = -1; return ; case Css3Lexer.LBRACE: nest++; break; case Css3Lexer.RBRACE: nest--; if(nest == 0) { //do not eat the final RBRACE return ; } } input.consume(); } } catch (Exception e) { // Just ignore any errors here, we will just let the recognizer // try to resync as normal - something must be very screwed. // } finally { if (mark != -1) { input.release(mark); } //dbg.exitRule(getGrammarFileName(), "recovery"); } } } @lexer::header { /* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package org.netbeans.modules.css.lib; } // ------------- // Main rule. This is the main entry rule for the parser, the top level // grammar rule. // // A style sheet consists of an optional character set specification, an optional series // of imports, and then the main body of style rules. // styleSheet : ws? ( charSet ws? )? ( layerStatement ws? )? imports? namespaces? body? EOF ; namespaces : ( namespace ws? )+ ; namespace : NAMESPACE_SYM ws? (namespacePrefixName ws?)? resourceIdentifier ws? SEMI ; namespacePrefixName : IDENT ; resourceIdentifier : STRING | URI ; charSet : CHARSET_SYM ws? charSetValue ws? SEMI ; charSetValue : STRING ; imports : ( ( importItem ws? SEMI ws? ) | {isScssSource()}? ( sass_use ws? SEMI ws? ) | {isScssSource()}? ( sass_forward ws? SEMI ws? ) )+ ; importItem : IMPORT_SYM ws? resourceIdentifier ws? importLayer? ((ws? mediaQueryList)=>ws? mediaQuery | //multiple imports in one directive {isScssSource()}? IMPORT_SYM ws? resourceIdentifier (ws? COMMA ws? resourceIdentifier)* | {isLessSource()}? IMPORT_SYM ws? (LPAREN less_import_types RPAREN ws?)? resourceIdentif ; importLayer : {tokenNameEquals("layer")}? IDENT (LPAREN ws? layerName ws? RPAREN)? ; sass_use : SASS_USE ws resourceIdentifier (ws sass_use_as)? (ws sass_use_with)? ; sass_use_as : {tokenNameEquals("as")}? IDENT ws IDENT ; sass_use_with : {tokenNameEquals("with")}? IDENT ws? LPAREN ws? sass_use_with_declaration (ws? COMMA ws? ; sass_use_with_declaration : cp_variable ws? COLON ws? cp_expression ; sass_forward : SASS_FORWARD ws resourceIdentifier ( ws ( sass_forward_hide | sass_forward_show))? ({toke ; sass_forward_as : {tokenNameEquals("as")}? IDENT ws IDENT ; sass_forward_with : {tokenNameEquals("with")}? IDENT ws? LPAREN ws? sass_forward_with_declaration (ws? COMM ; sass_forward_with_declaration : cp_variable ws? COLON ws? cp_expression ; sass_forward_hide : {tokenNameEquals("hide")}? IDENT ws IDENT (ws? COMMA ws? IDENT)* ; sass_forward_show : {tokenNameEquals("show")}? IDENT ws IDENT (ws? COMMA ws? IDENT)* ; media : MEDIA_SYM ws? ( mediaQueryList ) ws? LBRACE ws? syncToFollow mediaBody? RBRACE ; mediaBody : ( ( mediaBodyItem ((ws? SEMI)=>ws? SEMI)? ws? ) | ( SEMI ws? ) | ({isScssSource()}? sass_extend (ws | (SEMI))) )+ ; mediaBodyItem : (SASS_MIXIN | (((DOT IDENT) | HASH) ws? LPAREN (~RPAREN)* RPAREN ~(LBRACE|SEMI)* LBRACE))=>c //https://netbeans.org/bugzilla/show_bug.cgi?id=227510#c12 -- class selector in selec | (cp_mixin_call (ws? IMPORTANT_SYM)? ws? SEMI)=> {isLessSource()}? cp_mixin_call (ws? IMP | (cp_mixin_call)=> {isScssSource()}? cp_mixin_call (ws? IMPORTANT_SYM)? | (((SASS_AT_ROOT (ws selectorsGroup)? ) | (SASS_AT_ROOT ws LPAREN ws? IDENT ws? COLON ws? IDE | (propertyDeclaration)=>propertyDeclaration | {isScssSource()}? sass_debug | {isScssSource()}? sass_control | {isScssSource()}? sass_content | {isCssPreprocessorSource()}? importItem | rule | page | fontFace | vendorAtRule //Just a partial hotfix for nested MQ: complete grammar is defined in: http://www.w3.org/TR/ | media | supportsAtRule ; mediaQueryList : mediaQuery ( (ws? COMMA)=> ws? COMMA ws? mediaQuery )* ; mediaQuery : mediaCondition | (mediaQueryOperator ws? )? mediaType ((ws? key_and) => ws? key_and ws? mediaConditionWitho | {isLessSource()}? cp_variable ; mediaQueryOperator : key_only | NOT ; mediaCondition : (NOT ws?) mediaInParens //media-not | mediaInParens (ws? ( ws? key_and ws? mediaInParens //media-and | ws? key_or ws? mediaInParens //media-or ) )* | LPAREN ws* RPAREN ; mediaConditionWithoutOr : (NOT ws?) mediaInParens //media-not | mediaInParens (ws? key_and ws? mediaInParens)* //media-and | (HASH) => {isCssPreprocessorSource()}? sass_interpolation_expression_var ; mediaInParens: LPAREN ws? (mediaCondition | mediaExpression) ws? RPAREN ; mediaType : IDENT | GEN | {isCssPreprocessorSource()}? sass_interpolation_expression_var ; mediaExpression : mediaFeature (ws? (COLON | mediaComparisonOperator) ws? mediaFeatureValue)? | mediaFeatureRangeContext | (HASH) => {isCssPreprocessorSource()}? sass_interpolation_expression_var ; mediaComparisonOperator : OPEQ | LESS | LESS_OR_EQ | GREATER | GREATER_OR_EQ ; mediaRangeExplicitValue : LENGTH | EMS | REM | RESOLUTION | EXS | DIMENSION ; mediaFeatureValue : mediaRangeExplicitValue | {isCssPreprocessorSource()}? cp_expression | expression ; mediaFeatureRangeContext : (mediaFeatureValue ws? (LESS | LESS_OR_EQ) ) => mediaFeatureValue ws? (LESS | LESS_OR_EQ) ws? | (mediaFeatureValue ws? (GREATER | GREATER_OR_EQ) ) => mediaFeatureValue ws? (GREATER | GREA | mediaFeatureValue ws? OPEQ ws? mediaFeature ; mediaFeature : IDENT | GEN | {isCssPreprocessorSource()}? ( cp_variable | sass_interpolation_expressio ; body : ( ( bodyItem ((ws? SEMI)=>ws? SEMI)? ws? ) | ( SEMI ws? ) )+ ; bodyItem : (SASS_MIXIN | (((DOT IDENT) | HASH) ws? LPAREN (~RPAREN)* RPAREN ~(LBRACE|RBRACE|SEMI)* LBR //https://netbeans.org/bugzilla/show_bug.cgi?id=227510#c12 -- class selector in selec | (cp_mixin_call ws? SEMI)=> {isLessSource()}? cp_mixin_call | (cp_mixin_call)=> {isScssSource()}? cp_mixin_call | rule | (cp_variable ws? COLON)=> cp_variable_declaration | (sass_map)=> sass_map | at_rule //not exactly acc. to the spec, since just CP stuff can preceede, but is IMO satisfactory | {isCssPreprocessorSource()}? importItem | {isScssSource()}? sass_debug | {isScssSource()}? sass_control | {isScssSource()}? sass_function_declaration ; catch[ RecognitionException rce] { reportError(rce); consumeUntil(input, BitSet.of(NL)); } supportsAtRule : SUPPORTS_SYM ws? supportsCondition ws? LBRACE ws? syncToFollow mediaBody? RBRACE ; supportsCondition : NOT ws supportsInParens | supportsInParens (ws supportsWithOperator)? ; supportsWithOperator : supportsConjunction (ws supportsConjunction)* | supportsDisjunction (ws supportsDisjunction)* ; supportsConjunction : (key_and ws supportsInParens) ; supportsDisjunction : (key_or ws supportsInParens) ; supportsInParens options {backtrack=true;} : LPAREN ws? supportsCondition ws? RPAREN | supportsFeature | function // this is still lacking ( <any-value>?) - lets see whether this becomes // a problem or not ; supportsFeature : supportsDecl ; supportsDecl : LPAREN ws? declaration ws? RPAREN ; containerAtRule options {backtrack=true;} : (CONTAINER_SYM ws containerCondition ws? LBRACE) => CONTAINER_SYM ws containerCondition ws | CONTAINER_SYM ws containerName ws containerCondition ws? LBRACE ws? syncToFollow body? RB ; containerCondition : NOT ws containerQueryInParens | containerQueryInParens (ws containerQueryWithOperator)? ; containerQueryWithOperator : containerQueryConjunction (ws containerQueryConjunction)* | containerQueryDisjunction (ws containerQueryDisjunction)* ; containerQueryConjunction : (key_and ws containerQueryInParens) ; containerQueryDisjunction : (key_or ws containerQueryInParens) ; containerQueryInParens options {backtrack=true;} : LPAREN ws? containerCondition ws? RPAREN | sizeFeature | {tokenNameEquals("style")}? IDENT ws? LPAREN ws? styleQuery ws? RPAREN | function // this is still lacking ( <any-value>?) - lets see whether this becomes // a problem or not ; containerName : IDENT ; styleQuery: styleCondition | styleFeature ; styleCondition: NOT ws styleInParens | styleInParens (ws styleConditionWithOperator) ; styleConditionWithOperator : styleQueryConjunction (ws styleQueryConjunction)* | styleQueryDisjunction (ws styleQueryDisjunction)* ; styleQueryConjunction : (key_and ws styleInParens) ; styleQueryDisjunction : (key_or ws styleInParens) ; styleInParens options {backtrack=true;} : LPAREN ws? styleCondition ws? RPAREN | LPAREN ws? styleFeature ws? RPAREN | function // this is still lacking ( <any-value>?) - lets see whether this becomes // a problem or not ; sizeFeature options {backtrack=true;} : LPAREN ws? sizeFeatureFixedValue ws? RPAREN | LPAREN ws? sizeFeatureRangeSingle ws? RPAREN | LPAREN ws? sizeFeatureRangeBetweenLt ws? RPAREN | LPAREN ws? sizeFeatureRangeBetweenGt ws? RPAREN ; sizeFeatureFixedValue : sizeFeatureName ( ws? COLON ws? sizeFeatureValue)? ; sizeFeatureRangeSingle : (sizeFeatureName | sizeFeatureValue) ws? (OPEQ | LESS | LESS_OR_EQ | GREATER | GREATER_OR_EQ ; sizeFeatureRangeBetweenLt : sizeFeatureValue ws? (LESS | LESS_OR_EQ) ws? sizeFeatureName ws? (LESS | LESS_OR_EQ) ws? siz ; sizeFeatureRangeBetweenGt : sizeFeatureValue ws? (GREATER | GREATER_OR_EQ) ws? sizeFeatureName ws? (GREATER | GREATER_ ; sizeFeatureName : IDENT | VARIABLE ; sizeFeatureValue : term ; styleFeature : declaration ; layerAtRule : layerBlock | layerStatement ; layerBlock : (LAYER_SYM ws layerName? ws? layerBody) ; layerStatement : (LAYER_SYM ws layerName ( ws? COMMA ws? layerName)* SEMI) ; layerName : IDENT (DOT IDENT)* ; layerBody : LBRACE ws? body? ws? RBRACE ; at_rule : media | page | counterStyle | fontFace | supportsAtRule | vendorAtRule | layerAtRule | containerAtRule ; vendorAtRule : moz_document | webkitKeyframes | generic_at_rule; atRuleId : IDENT | STRING | {isCssPreprocessorSource()}? ( cp_variable | sass_interpolation_express ; generic_at_rule : {! tokenNameEquals("@charset")}? AT_IDENT (( ~ (SEMI | LBRACE)) => componentValue )* ((LBRA moz_document : MOZ_DOCUMENT_SYM ws? ( moz_document_function ws?) ( COMMA ws? moz_document_function ws? )* LBRACE ws? body? //can be empty RBRACE ; moz_document_function : URI | MOZ_URL_PREFIX | MOZ_DOMAIN | MOZ_REGEXP ; //http://developer.apple.com/library/safari/#documentation/appleapplications/ref webkitKeyframes : ( WEBKIT_KEYFRAMES_SYM | KEYFRAMES_SYM | {tokenNameEquals("@-moz-keyframes")}? AT_IDEN LBRACE ws? ( webkitKeyframesBlock ws? )* RBRACE ; webkitKeyframesBlock : webkitKeyframeSelectors ws? LBRACE ws? syncToFollow declarations? RBRACE | {isScssSource()}? {isScssSource()}? sass_content SEMI? ; webkitKeyframeSelectors : ( {tokenNameEquals("from")}? IDENT | {tokenNameEquals("to")}? IDENT | PERCENTAGE ) ( ws? CO ; page @init { boolean semiRequired = false; } : PAGE_SYM ws? ( IDENT ws? )? (pseudoPage ws?)? LBRACE //the grammar in the http://www.w3.org/TR/css3-page/ says the declaration/margins should //but there's no such char in the examples => making it arbitrary ( ws? ({semiRequired}? (SEMI ws?) | (SEMI ws?)?) (propertyDeclaration{semiRequired=true; SEMI? ws? RBRACE ; counterStyle : COUNTER_STYLE_SYM ws? IDENT ws? LBRACE ws? syncToDeclarationsRule declarations? RBRACE ; fontFace : FONT_FACE_SYM ws? LBRACE ws? syncToDeclarationsRule declarations? RBRACE ; margin : margin_sym ws? LBRACE ws? syncToDeclarationsRule declarations? RBRACE ; margin_sym : TOPLEFTCORNER_SYM | TOPLEFT_SYM | TOPCENTER_SYM | TOPRIGHT_SYM | TOPRIGHTCORNER_SYM | BOTTOMLEFTCORNER_SYM | BOTTOMLEFT_SYM | BOTTOMCENTER_SYM | BOTTOMRIGHT_SYM | BOTTOMRIGHTCORNER_SYM | LEFTTOP_SYM | LEFTMIDDLE_SYM | LEFTBOTTOM_SYM | RIGHTTOP_SYM | RIGHTMIDDLE_SYM | RIGHTBOTTOM_SYM ; pseudoPage : COLON IDENT ; operator : SOLIDUS | COMMA ; unaryOperator : MINUS | PLUS ; property : //parse as scss_declaration_interpolation_expression only if it really contains some #{} c //(the IE allows also just ident as its content) {isScssSource()}? sass_selector_interpolation_exp | {isLessSource()}? less_selector_interpolation_exp | VARIABLE | IDENT | GEN | {isCssPreprocessorSource()}? cp_variable ; catch[ RecognitionException rce] { reportError(rce); consumeUntil(input, BitSet.of(COLON)); } sass_map : sass_map_name COLON ws? LPAREN ws? syncToFollow //what can be in the map? --- just properties? sass_map_pairs? RPAREN ((ws? SASS_DEFAULT) | (ws? SASS_GLOBAL))* ; sass_map_name : cp_variable ; sass_map_pairs : ( ( sass_map_pair ((ws? COMMA)=>ws? COMMA)? ws? ) | ( COMMA ws? ) )+ ; sass_map_pair : (NUMBER|(STRING (ws? STRING)*)|((function)=>function)|property|sass_map) ws? COLON ws? ; rule : ( (SASS_AT_ROOT (ws selectorsGroup)?) | (SASS_AT_ROOT ws LPAREN ws? {tokenNameEquals("without") || tokenNameEquals("with")}? I | selectorsGroup ) ws? LBRACE ws? syncToFollow declarations? RBRACE ; catch[ RecognitionException rce] { reportError(rce); consumeUntil(input, BitSet.of(RBRACE)); input.consume(); //consume the RBRACE as well } declarations : (SEMI ws?)* declaration (((ws? (SEMI ws?)+)|ws) declaration)* ((ws? (SEMI ws?)+)|ws)? | (SEMI ws?)+ ; declaration : (cp_variable_declaration)=>cp_variable_declaration | (sass_map)=> sass_map | (sass_nested_properties)=>sass_nested_properties | (((SASS_AT_ROOT (ws selectorsGroup)? ) | (SASS_AT_ROOT ws LPAREN ws? IDENT ws? COLON ws? IDE | (propertyDeclaration)=>propertyDeclaration //for the error recovery - if the previous synt. predicate fails (an error in the declaration we | (property ws? COLON ~(LBRACE|SEMI|RBRACE)* (RBRACE|SEMI) )=>propertyDeclaration | (cp_mixin_declaration)=>cp_mixin_declaration | (cp_mixin_call)=> cp_mixin_call (ws? IMPORTANT_SYM)? | (cp_mixin_call)=> {isScssSource()}? cp_mixin_call (ws? IMPORTANT_SYM)? | at_rule | {isScssSource()}? sass_control | {isScssSource()}? sass_extend | {isScssSource()}? sass_debug | {isScssSource()}? sass_content | {isScssSource()}? sass_function_return | {isScssSource()}? sass_error | {isScssSource()}? importItem | GEN ; catch[ RecognitionException rce] { reportError(rce); consumeUntil(input, BitSet.of(SEMI)); } selectorsGroup : selector (ws? COMMA ws? selector)* ({isCssPreprocessorSource()}? COMMA)? ; selector : (combinator ws?)? simpleSelectorSequence ( ((ws? combinator ws?)|ws) simpleSelectorSeq | {isScssSource()}? combinator ; combinator : PLUS | GREATER | TILDE ; simpleSelectorSequence : (elementSubsequent | {isScssSource()}? sass_selector_interpolation_exp | {isLessSource()}? less_selector_interpolation_exp ) ((ws? esPred)=>((ws? elementSubse | (typeSelector)=>typeSelector ((ws? esPred)=>((ws? elementSubsequent) | {isScssSource() ; catch[ RecognitionException rce] { reportError(rce); consumeUntil(input, BitSet.of(LBRACE)); } //predicate esPred : HASH_SYMBOL | HASH | DOT | LBRACKET | COLON | DCOLON | SASS_EXTEND_ONLY_SELECTOR | {isCssPrep ; typeSelector options { k = 2; } : (((IDENT | STAR)? PIPE)=>namespacePrefix)? elementName ; namespacePrefix : ( namespacePrefixName | STAR)? PIPE ; elementSubsequent : ( {isScssSource()}? sass_extend_only_selector | {isCssPreprocessorSource()}? LESS_AND (IDENT | NUMBER | {isScssSource()}? sass_interpo | {isLessSource()}? LESS_AND less_selector_interpolation_exp | cssId | cssClass | slAttribute | pseudo ) ; //Error Recovery: Allow the parser to enter the cssId rule even if there's just hash char. cssId : HASH ({isScssSource()}? sass_selector_interpolation_exp)? | ( HASH_SYMBOL ( NAME | {isLessSource()}? less_selector_interpolation_exp // #@{var} { ... } ) ) ; catch[ RecognitionException rce] { reportError(rce); consumeUntil(input, BitSet.of(WS, IDENT, LBRACE)); } cssClass : (DOT ( {isScssSource()}? sass_selector_interpolation_exp | {isLessSource()}? less_selector_interpolation_exp | IDENT | NOT | GEN ) ) | {tokenNameStartsWith(".")}? DIMENSION ; catch[ RecognitionException rce] { reportError(rce); consumeUntil(input, BitSet.of(WS, IDENT, LBRACE)); } //using typeSelector even for the universal selector since the lookahead would have to be 3 (ID elementName : IDENT | GEN | LESS_AND | STAR ; slAttribute : LBRACKET namespacePrefix? ws? slAttributeName ws? ( ( OPEQ | INCLUDES | DASHMATCH | BEGINS | ENDS | CONTAINS ) ws? slAttributeValue ws? )? RBRACKET ; catch[ RecognitionException rce] { reportError(rce); consumeUntil(input, BitSet.of(IDENT, LBRACE)); } //bit similar naming to attrvalue, attrname - but these are different - for functions slAttributeName : IDENT ; slAttributeValue : ( IDENT | STRING ) ; pseudo : ( COLON | DCOLON ) ( ( ( IDENT | GEN ) ( // Function ws? LPAREN ws? ( (expression ws?) | STAR )? RPAREN )? ) | {isScssSource()}? sass_interpolation_expression_var | ( NOT ws? LPAREN ws? ( selectorsGroup ws?)? RPAREN ) | {tokenNameEquals("is") || tokenNameEquals("where") || tokenNameEquals("has")}? ( IDEN | ({isLessSource()}? {tokenNameEquals("extend")}? IDENT ws? LPAREN ws? selectorsGroup? R ) ; propertyDeclaration : {isCssPreprocessorSource() && !tokenNameStartsWith("--")}? STAR? property ws? COLON ws? cp | {tokenNameStartsWith("--")}? property ws? COLON ws? componentValueOuter? | STAR? property ws? COLON ws? propertyValue (ws? prio)? ; catch[ RecognitionException rce] { reportError(rce); //recovery: if an mismatched token occures inside a declaration is found, //then skip all tokens until an end of the rule is found represented by right curly brace consumeUntil(input, BitSet.of(SEMI, RBRACE)); } //XXX this is a hack for the IMPORT_SYM inside cp_expression cp_propertyValue : {isCssPreprocessorSource()}? cp_expression_list | propertyValue ; propertyValue : expression ; //an expression wich doesn't contain cp expression operators expressionPredicate options { k = 1; } : ( ~ (AT_IDENT | STAR | SOLIDUS | LBRACE | SEMI | RBRACE | SASS_VAR) )+ ( SEMI | RBRACE ) ; preservedToken: ~ (LPAREN | LBRACE | LBRACKET | RPAREN | RBRACE | RBRACKET); preservedTokenTopLevel: ~ (LPAREN | LBRACE | LBRACKET | RPAREN | RBRACE | RBRACKET | SEMI ); // {} block braceBlock2: LBRACE ws? declarations? RBRACE ; // simple brace block braceBlock: LBRACE componentValue* RBRACE; bracketBlock: LBRACKET componentValue+ RBRACKET; parenBlock: LPAREN componentValue+ RPAREN; componentValue: parenBlock | braceBlock | bracketBlock | (functionName ws? LPAREN) => functi componentValueOuter: (parenBlock | braceBlock | bracketBlock | (functionName ws? LPAREN) => //recovery: syncs the parser to the first identifier in the token input stream or the closing cu //since the rule matches epsilon it will always be entered syncToDeclarationsRule @init { //why sync to DOT? - LESS allows class rules nested syncToSet(BitSet.of(IDENT, RBRACE, STAR, DOT)); } : ; syncTo_RBRACE @init { syncToRBRACE(1); //initial nest == 1 } : ; syncTo_SEMI @init { syncToSet(BitSet.of(SEMI)); } : SEMI ; //synct to computed follow set in the rule syncToFollow @init { syncToSet(); } : ; prio : IMPORTANT_SYM ; expression : term ( (( ws | (ws? operator ws?) | /* nothing */) term)=> ( ws | (ws? operator ws?) | /* nothing */) t ; term : ( unaryOperator ws? )? ( (functionName ws? LPAREN)=>function //"myfunction(" as predicate | VARIABLE | {! (isScssSource() && tokenNameEquals2("."))}? IDENT | (LBRACKET WS? IDENT (WS IDENT)* WS? RBRACKET) | NUMBER | URANGE | PERCENTAGE | LENGTH | EMS | REM | EXS | ANGLE | TIME | FREQ | RESOLUTION | DIMENSION //so we can match expression like a:nth-child(3n+1) -- the "3n" is lexed as dimensi | STRING | TILDE ( STRING | LESS_JS_STRING ) //less escaped string/js string | LESS_JS_STRING //less js string | GEN | URI | hexColor | {isCssPreprocessorSource()}? cp_variable | {isScssSource()}? LESS_AND | {isScssSource()}? sass_interpolation_expression_var | {isLessSource()}? less_selector_interpolation | {isCssPreprocessorSource()}? cp_term_symbol //accept any garbage in preprocessors ) ; //SASS/LESS expressions workaround //Bug 233359 - false error in SASS editor //https://netbeans.org/bugzilla/show_bug.cgi?id=233359 cp_term_symbol : PERCENTAGE_SYMBOL //what else? ; function : functionName LPAREN ws? ( fnAttributes | //empty ) RPAREN ; catch[ RecognitionException rce] { reportError(rce); consumeUntil(input, BitSet.of(RPAREN, SEMI, RBRACE)); } functionName //css spec allows? here just IDENT, //but due to some nonstandart MS extension like progid:DXImageTransform.Microsoft.gradie //the function name can be a bit more complicated : (IDENT COLON)? IDENT (DOT IDENT)* ; fnAttributes : fnAttribute (ws? (COMMA | {isLessSource()}? SEMI) ws? fnAttribute)* ws? ; fnAttribute : (fnAttributeName ws? (OPEQ|COLON) )=>fnAttributeName ws? (OPEQ|COLON) ws? fnAttributeVal | (cp_expression)=> cp_expression | expression ; fnAttributeName : IDENT (DOT IDENT)* | {isCssPreprocessorSource()}? cp_variable ; fnAttributeValue : term ( (( ws | (ws? SOLIDUS ws?) | /* nothing */) term)=> ( ws | (ws? SOLIDUS ws?) | /* nothing */) term | {isCssPreprocessorSource()}? cp_math_expression ; hexColor : HASH ; ws : ( WS | NL | COMMENT )+ ; //*** LESS SYNTAX *** //Some additional modifications to the standard syntax rules has also been done. //ENTRY POINT FROM CSS GRAMMAR cp_variable_declaration : {isLessSource()}? cp_variable ws? COLON ws? cp_expression_list | {isScssSource()}? cp_variable ws? COLON ws? cp_expression_list ((ws? SASS_DEFAULT) | (ws? ; //ENTRY POINT FROM CSS GRAMMAR cp_variable : //every token which might possibly begin with the at sign {isLessSource()}? ( AT_IDENT | IMPORT_SYM | PAGE_SYM | MEDIA_SYM | NAMESPACE_SYM | CHARSET_S | {isScssSource()}? ( SASS_VAR | IDENT DOT SASS_VAR ) ; //comma separated list of cp_expression-s cp_expression_list : (cp_expression) => cp_expression ((ws? COMMA ws? cp_expression)=>ws? COMMA ws? cp_expression)* ; //expression: //----------- // //allowed content: //- boolean expression binary operators: and, or, <, >, <=, ==, ... //- boolean expression unary operator: not //- mathematical expression as term: cp_math_expression //- whitespace separated list of expression-s //- comma separted list of expressions-s in parenthesis // cp_expression : {isLessSource()}? (LBRACE ws? syncToFollow declarations? RBRACE) | (cp_expression_atom) => (cp_expression_atom ( (ws? cp_expression_operator)=>(ws? cp_expression_operator ws?) cp_expression_atom | (ws? cp_expression_atom)=>ws? cp_expression_atom )*) | {isScssSource()}? LPAREN ws? syncToFollow sass_map_pairs? RPAREN ; cp_expression_operator : key_or | key_and | CP_EQ | CP_NOT_EQ | LESS | LESS_OR_EQ | GREATER | GREATER_OR_EQ ; cp_expression_atom : (NOT ws?)? ( (cp_math_expression)=>cp_math_expression | LPAREN ws? (cp_expression_list ws?)? RPAREN ) ; //WS separated list of cp_math_expression-s cp_math_expressions : cp_math_expression (ws cp_math_expression)* ; //mathematical expression: //------------------------- //allowed content: //- parens: () //- binary oparators: +,-,* //- unary operators: +,- //- terms //- SASS interpolation expression where the term is allowed // //NOT ALLOWED: //- COMMAS //- terms separated just by whitespace - e.g. "one two" // cp_math_expression : cp_math_expression_atom ( (ws? (PLUS|MINUS|STAR|SOLIDUS) )=> ws? (PLUS|MINUS|STAR|SOLIDUS) ws? cp_math_expression )* ; cp_math_expression_atom : term | IMPORTANT_SYM //cp property value may contain any gargabe - TODO - possibly add other garbage | ( unaryOperator ws? )? LPAREN ws? cp_math_expression ws? RPAREN ; //parametric mixins: // .border-radius (@radius) // .box-shadow (@x: 0, @y: 0, @blur: 1px, @color: #000) // //normal mixin has common css syntax: .mixin so cannot be distinguished from a css class //ENTRY POINT FROM CSS GRAMMAR cp_mixin_declaration : ( {isLessSource()}? (LESS_AND | (((DOT cp_mixin_name) | HASH) ws? LPAREN ws? cp_args_list? RP | {isScssSource()}? SASS_MIXIN ws cp_mixin_name (ws? LPAREN ws? cp_args_list? RPAREN)? ) ws? cp_mixin_block ; //allow: .mixin; .mixin(); .mixin(@param, #77aa00); //ENTRY POINT FROM CSS GRAMMAR cp_mixin_call : ( {isLessSource()}? (DOT cp_mixin_name | HASH | AT_IDENT | LESS_AND) ((ws? combinator ws?) => ws | {isScssSource()}? SASS_INCLUDE ws cp_mixin_name (ws? LPAREN ws? cp_mixin_call_args? RPAR ) ; cp_mixin_block : LBRACE ws? syncToFollow (declarations | (webkitKeyframeSelectors) => ( webkitKeyframesBlock ws? )*)? RBRACE ; cp_mixin_name : IDENT ; cp_mixin_call_args : //the term separatos is supposed to be just COMMA, but in some weird old? samples //I found semicolon used as a delimiter between arguments cp_mixin_call_arg ( (COMMA | SEMI) ws? cp_mixin_call_arg)* (CP_DOTS ws?)? SEMI? ; cp_mixin_call_arg : ( cp_variable ws? COLON ws? cp_expression | cp_expression ) ws? ; //.box-shadow ("@x: 0, @y: 0, @blur: 1px, @color: #000") cp_args_list : //the term separatos is supposed to be just COMMA, but in some weird old? samples //I found semicolon used as a delimiter between arguments //sass varargs: //@mixin box-shadow($shadows...) {} -- note that now also LESS parser allows this incorrectl ( cp_arg ( ( COMMA | SEMI ) ws? cp_arg)* ( (COMMA | SEMI) ws? )? ( (CP_DOTS | LESS_REST) ws? )?) | (CP_DOTS | LESS_REST) ws? ; //.box-shadow ("@x: 0", @y: 0, @blur: 1px, @color: #000) cp_arg : cp_variable ws? ( COLON ws? cp_expression ws?)? | {isLessSource()}? IDENT ; //.mixin (@a) "when (lightness(@a) >= 50%)" { //.mixin (@a) "when (@a > 10), (@a < -10)" { ... } less_mixin_guarded : less_when ws? less_condition (ws? (COMMA | key_and) ws? less_condition)* ; //.truth (@a) when (@a) { ... } //.truth (@a) when (@a = true) { ... } less_condition : (NOT ws?)? LPAREN ws? ( (cp_variable | less_function_in_condition) ws? (less_condition_operator ws? cp_math_ex ) RPAREN ; //.mixin (@a, @b: 0) when ("isnumber(@b)") { ... } less_function_in_condition : less_fn_name ws? LPAREN ws? cp_variable ws? RPAREN ; //.mixin (@a, @b: 0) when ("isnumber"(@b)) { ... } less_fn_name : IDENT ; less_condition_operator : GREATER | GREATER_OR_EQ | OPEQ | LESS | LESS_OR_EQ ; less_selector_interpolation_exp : (IDENT | MINUS)? less_selector_interpolation (less_selector_interpolation_exp | ( IDENT ; less_selector_interpolation : AT_SIGN LBRACE ws? IDENT ws? RBRACE ; //SCSS interpolation expression sass_selector_interpolation_exp : (IDENT | MINUS)? sass_interpolation_expression_var (sass_selector_interpolation_exp | ; sass_interpolation_expression_var : HASH_SYMBOL LBRACE WS? cp_expression WS? RBRACE //XXX possibly allow cp_expression inside ; //SASS nested properties: //.funky { // font: 2px/3px { // family: fantasy; // size: 30em; // weight: bold; // } //} // //or just: // //.funky { // font: { // family: fantasy; // size: 30em; // weight: bold; // } //} sass_nested_properties : property ws? COLON ws? (propertyValue ws?)? LBRACE ws? syncToFollow declarations? RBRACE ; sass_extend : SASS_EXTEND ws simpleSelectorSequence (ws? COMMA ws? simpleSelectorSequence)* (ws SASS_O ; sass_extend_only_selector : SASS_EXTEND_ONLY_SELECTOR sass_selector_interpolation_exp? ; sass_debug : ( SASS_DEBUG | SASS_WARN ) ws cp_expression ; sass_error : SASS_ERROR ws STRING ; sass_control : sass_if | sass_for | sass_each | sass_while ; sass_if : SASS_IF ws? sass_control_expression ws? sass_control_block (ws? sass_else)? ; sass_else : SASS_ELSE ws? sass_control_block | ((SASS_ELSE ws? {tokenNameEquals("if")}? IDENT /* if */) | SASS_ELSEIF) ws? sass_control_e ; sass_control_expression : cp_expression ; sass_for : SASS_FOR ws cp_variable ws {tokenNameEquals("from")}? IDENT /*from*/ ws cp_math_expressi ; sass_each : SASS_EACH ws sass_each_variables ws {tokenNameEquals("in")}? IDENT /*in*/ ws (cp_express ; sass_each_variables : cp_variable ( (ws? COMMA)=> ws? COMMA ws? cp_variable )* ; sass_while : SASS_WHILE ws sass_control_expression ws? sass_control_block ; sass_control_block : LBRACE ws? declarations? RBRACE //likely not enough! ; sass_function_declaration : //I assume there can be not only the return statement in the function block, //but so far haven't found any such example so I put the declarations rule inside //and added the sass_function_return into the declarations rule itself (not fully correct) //as the return should be allowed only from the sass function declaration SASS_FUNCTION ws sass_function_name ws? LPAREN ws? cp_args_list? RPAREN ws? LBRACE ws? decl ; sass_function_name : IDENT ; sass_function_return : SASS_RETURN ws cp_expression ; sass_content : SASS_CONTENT ; less_import_types: {tokenNameIs(new String[]{"LESS", "CSS", "REFERENCE", "INLINE", "ONCE", "MULTIPLE", "OP ; catch[ RecognitionException rce] { reportError(rce); input.consume(); } less_when: {tokenNameEquals("when")}? IDENT ; key_and: {tokenNameEquals("and")}? IDENT ; key_or: {tokenNameEquals("or")}? IDENT ; key_only: {tokenNameEquals("only")}? IDENT ; //*** END OF LESS SYNTAX *** // ============================================================== // LEXER // // The lexer follows the normative section of WWW standard as closely // as it can. For instance, where the ANTLR lexer returns a token that // is unambiguous for both ANTLR and lex (the standard defines tokens // in lex notation), then the token names are equivalent. // // Note however that lex has a match order defined as top to bottom // with longest match first. This results in a fairly inefficent, match, // REJECT, match REJECT set of operations. ANTLR lexer grammars are actaully // LL grammars (and hence LL recognizers), which means that we must // specifically disambiguate longest matches and so on, when the lex // like normative grammar results in ambiguities as far as ANTLR is concerned. // // This means that some tokens will either be combined compared to the // normative spec, and the paresr will recognize them for what they are. // In this case, the token will named as XXX_YYY where XXX and YYY are the // token names used in the specification. // // Lex style macro names used in the spec may sometimes be used (in upper case // version) as fragment rules in this grammar. However ANTLR fragment rules // are not quite the same as lex macros, in that they generate actual // methods in the recognizer class, and so may not be as effecient. In // some cases then, the macro contents are embedded. Annotation indicate when // this is the case. // // See comments in the rules for specific details. // -------------------------------------------------------------- // // N.B. CSS 2.1 is defined as case insensitive, but because each character // is allowed to be written as in escaped form we basically define each // character as a fragment and reuse it in all other rules. // ============================================================== // -------------------------------------------------------------- // Define all the fragments of the lexer. These rules neither recognize // nor create tokens, but must be called from non-fragment rules, which // do create tokens, using these fragments to either purely define the // token number, or by calling them to match a certain portion of // the token string. // GEN : '@@@'; fragment HEXCHAR : ('a'..'f'|'A'..'F'|'0'..'9') ; fragment NONASCII : '\u0080'..'\uFFFF' ; // NB: Upper bound should be \u4177777 fragment UNICODE : '\\' HEXCHAR (HEXCHAR (HEXCHAR (HEXCHAR (HEXCHAR HEXCHAR?)? )? )? )? ('\r'|'\n'|'\t'|'\f'|' ')* ; fragment ESCAPE : UNICODE | '\\' ~('\r'|'\n'|'\f'|HEXCHAR) ; fragment NMSTART : '_' | 'a'..'z' | 'A'..'Z' | NONASCII | ESCAPE ; fragment NMCHAR : '_' | 'a'..'z' | 'A'..'Z' | '0'..'9' | '-' | NONASCII | ESCAPE ; fragment NAME : NMCHAR+ ; fragment URL : (( '['|'!'|'#'|'$'|'%'|'&'|'*'|'~'|'.'|':'|'/'|'?'|'='|';'|','|'+'|'@'|'|' | '{' | '}' | NMCHAR ) ( '['|'!'|'#'|'$'|'%'|'&'|'*'|'~'|'.'|':'|'/'|'?'|'='|';'|','|'+'|'@'|'|' | WS | '\"' | '{' | '}' | NMCHAR )*)? ; // Basic Alpha characters in upper, lower and escaped form. fragment A : ('a'|'A') | '\\' ('0' ('0' ('0' '0'?)?)?)? ('4'|'6')'1' ; fragment B : ('b'|'B') | '\\' ('0' ('0' ('0' '0'?)?)?)? ('4'|'6')'2' ; fragment C : ('c'|'C') | '\\' ('0' ('0' ('0' '0'?)?)?)? ('4'|'6')'3' ; fragment D : ('d'|'D') | '\\' ('0' ('0' ('0' '0'?)?)?)? ('4'|'6')'4' ; fragment E : ('e'|'E') | '\\' ('0' ('0' ('0' '0'?)?)?)? ('4'|'6')'5' ; fragment F : ('f'|'F') | '\\' ('0' ('0' ('0' '0'?)?)?)? ('4'|'6')'6' ; fragment G : ('g'|'G') | '\\' ( 'g' | 'G' | ('0' ('0' ('0' '0'?)?)?)? ('4'|'6')'7' ) ; fragment H : ('h'|'H') | '\\' ( 'h' | 'H' | ('0' ('0' ('0' '0'?)?)?)? ('4'|'6')'8' ) ; fragment I : ('i'|'I') | '\\' ( 'i' | 'I' | ('0' ('0' ('0' '0'?)?)?)? ('4'|'6')'9' ) ; fragment J : ('j'|'J') | '\\' ( 'j' | 'J' | ('0' ('0' ('0' '0'?)?)?)? ('4'|'6')('A'|'a') ) ; fragment K : ('k'|'K') | '\\' ( 'k' | 'K' | ('0' ('0' ('0' '0'?)?)?)? ('4'|'6')('B'|'b') ) ; fragment L : ('l'|'L') | '\\' ( 'l' | 'L' | ('0' ('0' ('0' '0'?)?)?)? ('4'|'6')('C'|'c') ) ; fragment M : ('m'|'M') | '\\' ( 'm' | 'M' | ('0' ('0' ('0' '0'?)?)?)? ('4'|'6')('D'|'d') ) ; fragment N : ('n'|'N') | '\\' ( 'n' | 'N' | ('0' ('0' ('0' '0'?)?)?)? ('4'|'6')('E'|'e') ) ; fragment O : ('o'|'O') | '\\' ( 'o' | 'O' | ('0' ('0' ('0' '0'?)?)?)? ('4'|'6')('F'|'f') ) ; fragment P : ('p'|'P') | '\\' ( 'p' | 'P' | ('0' ('0' ('0' '0'?)?)?)? ('5'|'7')('0') ) ; fragment Q : ('q'|'Q') | '\\' ( 'q' | 'Q' | ('0' ('0' ('0' '0'?)?)?)? ('5'|'7')('1') ) ; fragment R : ('r'|'R') | '\\' ( 'r' | 'R' | ('0' ('0' ('0' '0'?)?)?)? ('5'|'7')('2') ) ; fragment S : ('s'|'S') | '\\' ( 's' | 'S' | ('0' ('0' ('0' '0'?)?)?)? ('5'|'7')('3') ) ; fragment T : ('t'|'T') | '\\' ( 't' | 'T' | ('0' ('0' ('0' '0'?)?)?)? ('5'|'7')('4') ) ; fragment U : ('u'|'U') | '\\' ( 'u' | 'U' | ('0' ('0' ('0' '0'?)?)?)? ('5'|'7')('5') ) ; fragment V : ('v'|'V') | '\\' ( 'v' | 'V' | ('0' ('0' ('0' '0'?)?)?)? ('5'|'7')('6') ) ; fragment W : ('w'|'W') | '\\' ( 'w' | 'W' | ('0' ('0' ('0' '0'?)?)?)? ('5'|'7')('7') ) ; fragment X : ('x'|'X') | '\\' ( 'x' | 'X' | ('0' ('0' ('0' '0'?)?)?)? ('5'|'7')('8') ) ; fragment Y : ('y'|'Y') | '\\' ( 'y' | 'Y' | ('0' ('0' ('0' '0'?)?)?)? ('5'|'7')('9') ) ; fragment Z : ('z'|'Z') | '\\' ( 'z' | 'Z' | ('0' ('0' ('0' '0'?)?)?)? ('5'|'7')('A'|'a') ) ; // --------------------- // HTML comment open. HTML/XML comments may be placed around style sheets so that they // are hidden from higher scope parsing engines such as HTML parsers. // They comment open is therfore ignored by the CSS parser and we hide // it from the ANLTR parser. // CDO : '<!--' { $channel = 3; // CDO on channel 3 in case we want it later } ; // --------------------- // HTML comment close. HTML/XML comments may be placed around style sheets so that they // are hidden from higher scope parsing engines such as HTML parsers. // They comment close is therfore ignored by the CSS parser and we hide // it from the ANLTR parser. // CDC : '-->' { $channel = 4; // CDC on channel 4 in case we want it later } ; INCLUDES : '~=' ; DASHMATCH : '|=' ; BEGINS : '^=' ; ENDS : '$=' ; CONTAINS : '*=' ; GREATER : '>' ; LBRACE : '{' ; RBRACE : '}' ; LBRACKET : '[' ; RBRACKET : ']' ; OPEQ : '=' ; SEMI : ';' ; COLON : ':' ; DCOLON : '::' ; SOLIDUS : '/' ; MINUS : '-' ; PLUS : '+' ; STAR : '*' ; LPAREN : '(' ; RPAREN : ')' ; COMMA : ',' ; DOT : '.' ; TILDE : '~' ; PIPE : '|' ; PERCENTAGE_SYMBOL : '%' ; EXCLAMATION_MARK: '!' ; CP_EQ : '==' ; CP_NOT_EQ : '!=' ; LESS : '<' ; GREATER_OR_EQ : '>=' | '=>'; //a weird operator variant supported by SASS LESS_OR_EQ : '=<' | '<='; //a weird operator variant supported by SASS LESS_AND : '&' '-'* ; CP_DOTS : '...'; LESS_REST : '@rest...'; // ----------------- // Literal strings. Delimited by either ' or " // fragment INVALID :; STRING : '\'' ( ~('\r'|'\f'|'\'') )* ( '\'' | { $type = INVALID; } ) | '"' ( ('\\\"') => '\\\"' | ('\\\\') => '\\\\' | ~ ('\r'|'\f'|'"') )* ( '"' | { $type = INVALID; } ) ; LESS_JS_STRING : '`' ( ~('\r'|'\f'|'`') )* ( '`' | { $type = INVALID; } ) ; NOT : 'NOT'; // Variable. Used to define properties, that can be used in the grammar by the // var function (https://www.w3.org/TR/css-variables-1/) VARIABLE : '--' NMSTART NMCHAR* ; // ------------- // Identifier. Identifier tokens pick up properties names and values // IDENT : '-'? NMSTART NMCHAR* ; // ------------- // Reference. Reference to an element in the body we are styling, such as <XXXX id="reference"> // HASH_SYMBOL : '#'; HASH : HASH_SYMBOL NAME; IMPORTANT_SYM : EXCLAMATION_MARK (WS|COMMENT)* 'IMPORTANT' ; IMPORT_SYM : '@IMPORT'; PAGE_SYM : '@PAGE'; MEDIA_SYM : '@MEDIA'; NAMESPACE_SYM : '@NAMESPACE' ; CHARSET_SYM : '@CHARSET'; COUNTER_STYLE_SYM : '@COUNTER-STYLE'; FONT_FACE_SYM : '@FONT-FACE'; SUPPORTS_SYM : '@SUPPORTS'; LAYER_SYM : '@LAYER'; CONTAINER_SYM : '@CONTAINER'; KEYFRAMES_SYM : '@KEYFRAMES'; TOPLEFTCORNER_SYM :'@TOP-LEFT-CORNER'; TOPLEFT_SYM :'@TOP-LEFT'; TOPCENTER_SYM :'@TOP-CENTER'; TOPRIGHT_SYM :'@TOP-RIGHT'; TOPRIGHTCORNER_SYM :'@TOP-RIGHT-CORNER'; BOTTOMLEFTCORNER_SYM :'@BOTTOM-LEFT-CORNER'; BOTTOMLEFT_SYM :'@BOTTOM-LEFT'; BOTTOMCENTER_SYM :'@BOTTOM-CENTER'; BOTTOMRIGHT_SYM :'@BOTTOM-RIGHT'; BOTTOMRIGHTCORNER_SYM :'@BOTTOM-RIGHT-CORNER'; LEFTTOP_SYM :'@LEFT-TOP'; LEFTMIDDLE_SYM :'@LEFT-MIDDLE'; LEFTBOTTOM_SYM :'@LEFT-BOTTOM'; RIGHTTOP_SYM :'@RIGHT-TOP'; RIGHTMIDDLE_SYM :'@RIGHT-MIDDLE'; RIGHTBOTTOM_SYM :'@RIGHT-BOTTOM'; MOZ_DOCUMENT_SYM : '@-MOZ-DOCUMENT'; WEBKIT_KEYFRAMES_SYM : '@-WEBKIT-KEYFRAMES'; //this generic at rule must be after the last of the specific at rule tokens SASS_CONTENT : '@CONTENT'; SASS_MIXIN : '@MIXIN'; SASS_INCLUDE : '@INCLUDE'; SASS_EXTEND : '@EXTEND'; SASS_DEBUG : '@DEBUG'; SASS_ERROR : '@ERROR'; SASS_WARN : '@WARN'; SASS_IF : '@IF'; SASS_ELSE : '@ELSE'; SASS_ELSEIF : '@ELSEIF'; //@elseif SASS_FOR : '@FOR'; SASS_FUNCTION : '@FUNCTION'; SASS_RETURN : '@RETURN'; SASS_USE : '@USE'; SASS_FORWARD : '@FORWARD'; SASS_EACH : '@EACH'; SASS_WHILE : '@WHILE'; SASS_AT_ROOT : '@AT-ROOT'; AT_SIGN : '@'; AT_IDENT : (AT_SIGN | (AT_SIGN AT_SIGN)) NMCHAR+; SASS_VAR : '$' NMCHAR+; SASS_DEFAULT : '!DEFAULT'; SASS_OPTIONAL : '!OPTIONAL'; SASS_GLOBAL : '!GLOBAL'; SASS_EXTEND_ONLY_SELECTOR : PERCENTAGE_SYMBOL NMCHAR+; // --------- // Numbers. Numbers can be followed by pre-known units or unknown units // as well as '%' it is a precentage. Whitespace cannot be between // the numebr and teh unit or percent. Hence we scan any numeric, then // if we detect one of the lexical sequences for unit tokens, we change // the lexical type dynamically. // // Here we first define the various tokens, then we implement the // number parsing rule. // fragment EMS :; // 'em' fragment EXS :; // 'ex' fragment LENGTH :; // 'px'. 'cm', 'mm', 'in'. 'pt', 'pc' fragment REM :; // 'rem' fragment ANGLE :; // 'deg', 'rad', 'grad' fragment TIME :; // 'ms', 's' fragment FREQ :; // 'khz', 'hz' fragment DIMENSION :; // nnn'Somethingnotyetinvented' fragment PERCENTAGE :; // '%' fragment RESOLUTION :; //dpi,dpcm NUMBER : ( '0'..'9'+ ('.' '0'..'9'+)? | '.' '0'..'9'+ ) ( (D P (I|C))=> D P ( I | C M ) { $type = RESOLUTION; } | (E (M|X))=> E ( M { $type = EMS; } | X { $type = EXS; } ) | (P(X|T|C))=> P ( X | T | C ) { $type = LENGTH; } | (C M)=> C M { $type = LENGTH; } | (M (M|S))=> M ( M { $type = LENGTH; } | S { $type = TIME; } ) | (I N)=> I N { $type = LENGTH; } | (D E G)=> D E G { $type = ANGLE; } // | (R A D)=> // R A D { $type = ANGLE; } | (R (A|E))=> R ( A D {$type = ANGLE; } | E M {$type = REM; } ) | (S)=>S { $type = TIME; } | (K? H Z)=> K? H Z { $type = FREQ; } | IDENT { $type = DIMENSION; } | PERCENTAGE_SYMBOL { $type = PERCENTAGE; } | // Just a number ) ; // ------------ // url and uri. // URI : U R L '(' ((WS)=>WS)? (URL|STRING) WS? ')' ; fragment HEXCHAR_WILDCARD: '?' | HEXCHAR; URANGE: ('u'|'U') PLUS HEXCHAR_WILDCARD+ (MINUS HEXCHAR_WILDCARD+)?; MOZ_URL_PREFIX : 'URL-PREFIX(' ((WS)=>WS)? (URL|STRING) WS? ')' ; MOZ_DOMAIN : 'DOMAIN(' ((WS)=>WS)? (URL|STRING) WS? ')' ; MOZ_REGEXP : 'REGEXP(' ((WS)=>WS)? STRING WS? ')' ; // ------------- // Whitespace. Though the W3 standard shows a Yacc/Lex style parser and lexer // that process the whitespace within the parser, ANTLR does not // need to deal with the whitespace directly in the parser. // WS : (' '|'\t')+ ; NL : // ('\r' '\n'? | '\n') ('\r' | '\n')+ ; // Comments. Comments may not be nested, may be multilined and are delimited // like C comments: /* ..... */ COMMENT : '/*' ( options { greedy=false; } : .*) '*/' ; LINE_COMMENT : '//'( options { greedy=false; } : ~('\r' | '\n')* ) { if (isCssPreprocessorSource()) {$channel = HIDDEN;} } ; // ------------- // Illegal. Any other character shoudl not be allowed. // [ Dauer der Verarbeitung: 0.12 Sekunden (vorverarbeitet) ] |
2026-04-02