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new Error("Missed `structure` field in `"+n+"` node type definition");t[n]=sn(n,r)}return t}(e),e){if(e.types)for(var r in e.types)this.addType_(r,e.types[r]);if(e.generic)for(var r in this.generic=!0,ut)this.addType_(r,ut[r]);if(e.atrules)for(var r in e.atrules)this.addAtrule_(r,e.atrules[r]);if(e.properties)for(var r in e.properties)this.addProperty_(r,e.properties[r])}};yn.prototype={structure:{},checkStructure:function(e){function t(e,t){r.push({node:e,message:t})}var n=this.structure,r=[];return this.syntax.walk(e,(function(e){n.hasOwnProperty(e.type)?n[e.type].check(e,t):t(e,"Unknown node type `"+e.type+"`")})),!!r.length&&r},createDescriptor:function(e,t,n,r=null){var a={type:t,name:n},i={type:t,name:n,parent:r,syntax:null,match:null};return"function"==typeof e?i.match=un(e,a):("string"==typeof e?Object.defineProperty(i,"syntax",{get:function(){return Object.defineProperty(i,"syntax",{value:Pt(e)}),i.syntax}}):i.syntax=e,Object.defineProperty(i,"match",{get:function(){return 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e=this.scanner.tokenIndex,t=this.Value();return"Raw"!==t.type&&!1===this.scanner.eof&&this.scanner.tokenType!==Ya&&!1===this.scanner.isDelim(33)&&!1===this.scanner.isBalanceEdge(e)&&this.error(),t}var Qa={name:"Declaration",structure:{important:[Boolean,String],property:String,value:["Value","Raw"]},parse:function(){var e,t=this.scanner.tokenStart,n=this.scanner.tokenIndex,r=Xa.call(this),a=ja(r),i=a?this.parseCustomProperty:this.parseValue,o=a?Ga:Ka,s=!1;this.scanner.skipSC(),this.eat(Ua);const l=this.scanner.tokenIndex;if(a||this.scanner.skipSC(),e=i?this.parseWithFallback($a,o):o.call(this,this.scanner.tokenIndex),a&&"Value"===e.type&&e.children.isEmpty())for(let t=l-this.scanner.tokenIndex;t<=0;t++)if(this.scanner.lookupType(t)===Va){e.children.appendData({type:"WhiteSpace",loc:null,value:" "});break}return this.scanner.isDelim(33)&&(s=Za.call(this),this.scanner.skipSC()),!1===this.scanner.eof&&this.scanner.tokenType!==Ya&&!1===this.scanner.isBalanceEdge(n)&&this.error(),{type:"Declaration",loc:this.getLocation(t,this.scanner.tokenStart),important:s,property:r,value:e}},generate:function(e){this.chunk(e.property),this.chunk(":"),this.node(e.value),e.important&&this.chunk(!0===e.important?"!important":"!"+e.important)},walkContext:"declaration"};function Xa(){var e=this.scanner.tokenStart;if(this.scanner.tokenType===Ha)switch(this.scanner.source.charCodeAt(this.scanner.tokenStart)){case 42:case 36:case 43:case 35:case 38:this.scanner.next();break;case 47:this.scanner.next(),this.scanner.isDelim(47)&&this.scanner.next()}return this.scanner.tokenType===Fa?this.eat(Fa):this.eat(Wa),this.scanner.substrToCursor(e)}function Za(){this.eat(Ha),this.scanner.skipSC();var e=this.consume(Wa);return"important"===e||e}var Ja=we.TYPE,ei=Fr.mode,ti=Ja.WhiteSpace,ni=Ja.Comment,ri=Ja.Semicolon;function ai(e){return this.Raw(e,ei.semicolonIncluded,!0)}var ii={name:"DeclarationList",structure:{children:[["Declaration"]]},parse:function(){for(var e=this.createList();!this.scanner.eof;)switch(this.scanner.tokenType){case ti:case ni:case ri:this.scanner.next();break;default:e.push(this.parseWithFallback(this.Declaration,ai))}return{type:"DeclarationList",loc:this.getLocationFromList(e),children:e}},generate:function(e){this.children(e,(function(e){"Declaration"===e.type&&this.chunk(";")}))}},oi=M.consumeNumber,si=we.TYPE.Dimension,li={name:"Dimension",structure:{value:String,unit:String},parse:function(){var e=this.scanner.tokenStart,t=oi(this.scanner.source,e);return this.eat(si),{type:"Dimension",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.source.substring(e,t),unit:this.scanner.source.substring(t,this.scanner.tokenStart)}},generate:function(e){this.chunk(e.value),this.chunk(e.unit)}},ci=we.TYPE.RightParenthesis,ui={name:"Function",structure:{name:String,children:[[]]},parse:function(e,t){var n,r=this.scanner.tokenStart,a=this.consumeFunctionName(),i=a.toLowerCase();return n=t.hasOwnProperty(i)?t[i].call(this,t):e.call(this,t),this.scanner.eof||this.eat(ci),{type:"Function",loc:this.getLocation(r,this.scanner.tokenStart),name:a,children:n}},generate:function(e){this.chunk(e.name),this.chunk("("),this.children(e),this.chunk(")")},walkContext:"function"},hi=we.TYPE.Hash,di={name:"Hash",structure:{value:String},parse:function(){var e=this.scanner.tokenStart;return this.eat(hi),{type:"Hash",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.substrToCursor(e+1)}},generate:function(e){this.chunk("#"),this.chunk(e.value)}},pi=we.TYPE.Ident,mi={name:"Identifier",structure:{name:String},parse:function(){return{type:"Identifier",loc:this.getLocation(this.scanner.tokenStart,this.scanner.tokenEnd),name:this.consume(pi)}},generate:function(e){this.chunk(e.name)}},fi=we.TYPE.Hash,gi={name:"IdSelector",structure:{name:String},parse:function(){var e=this.scanner.tokenStart;return this.eat(fi),{type:"IdSelector",loc:this.getLocation(e,this.scanner.tokenStart),name:this.scanner.substrToCursor(e+1)}},generate:function(e){this.chunk("#"),this.chunk(e.name)}},bi=we.TYPE,yi=bi.Ident,vi=bi.Number,ki=bi.Dimension,wi=bi.LeftParenthesis,xi=bi.RightParenthesis,Si=bi.Colon,Ci=bi.Delim,Ai={name:"MediaFeature",structure:{name:String,value:["Identifier","Number","Dimension","Ratio",null]},parse:function(){var 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t=this.createList();for(this.scanner.skipSC();!this.scanner.eof&&(t.push(this.MediaQuery(e)),this.scanner.tokenType===Di);)this.scanner.next();return{type:"MediaQueryList",loc:this.getLocationFromList(t),children:t}},generate:function(e){this.children(e,(function(){this.chunk(",")}))}},Ri=we.TYPE.Number,Ni={name:"Number",structure:{value:String},parse:function(){return{type:"Number",loc:this.getLocation(this.scanner.tokenStart,this.scanner.tokenEnd),value:this.consume(Ri)}},generate:function(e){this.chunk(e.value)}},Bi={name:"Operator",structure:{value:String},parse:function(){var e=this.scanner.tokenStart;return this.scanner.next(),{type:"Operator",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.substrToCursor(e)}},generate:function(e){this.chunk(e.value)}},Mi=we.TYPE,ji=Mi.LeftParenthesis,_i=Mi.RightParenthesis,qi={name:"Parentheses",structure:{children:[[]]},parse:function(e,t){var n,r=this.scanner.tokenStart;return this.eat(ji),n=e.call(this,t),this.scanner.eof||this.eat(_i),{type:"Parentheses",loc:this.getLocation(r,this.scanner.tokenStart),children:n}},generate:function(e){this.chunk("("),this.children(e),this.chunk(")")}},Wi=M.consumeNumber,Fi=we.TYPE.Percentage,Ui={name:"Percentage",structure:{value:String},parse:function(){var e=this.scanner.tokenStart,t=Wi(this.scanner.source,e);return this.eat(Fi),{type:"Percentage",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.source.substring(e,t)}},generate:function(e){this.chunk(e.value),this.chunk("%")}},Yi=we.TYPE,Hi=Yi.Ident,Vi=Yi.Function,Ki=Yi.Colon,Gi=Yi.RightParenthesis,$i={name:"PseudoClassSelector",structure:{name:String,children:[["Raw"],null]},parse:function(){var e,t,n=this.scanner.tokenStart,r=null;return this.eat(Ki),this.scanner.tokenType===Vi?(t=(e=this.consumeFunctionName()).toLowerCase(),this.pseudo.hasOwnProperty(t)?(this.scanner.skipSC(),r=this.pseudo[t].call(this),this.scanner.skipSC()):(r=this.createList()).push(this.Raw(this.scanner.tokenIndex,null,!1)),this.eat(Gi)):e=this.consume(Hi),{type:"PseudoClassSelector",loc:this.getLocation(n,this.scanner.tokenStart),name:e,children:r}},generate:function(e){this.chunk(":"),this.chunk(e.name),null!==e.children&&(this.chunk("("),this.children(e),this.chunk(")"))},walkContext:"function"},Qi=we.TYPE,Xi=Qi.Ident,Zi=Qi.Function,Ji=Qi.Colon,eo=Qi.RightParenthesis,to={name:"PseudoElementSelector",structure:{name:String,children:[["Raw"],null]},parse:function(){var e,t,n=this.scanner.tokenStart,r=null;return this.eat(Ji),this.eat(Ji),this.scanner.tokenType===Zi?(t=(e=this.consumeFunctionName()).toLowerCase(),this.pseudo.hasOwnProperty(t)?(this.scanner.skipSC(),r=this.pseudo[t].call(this),this.scanner.skipSC()):(r=this.createList()).push(this.Raw(this.scanner.tokenIndex,null,!1)),this.eat(eo)):e=this.consume(Xi),{type:"PseudoElementSelector",loc:this.getLocation(n,this.scanner.tokenStart),name:e,children:r}},generate:function(e){this.chunk("::"),this.chunk(e.name),null!==e.children&&(this.chunk("("),this.children(e),this.chunk(")"))},walkContext:"function"},no=we.isDigit,ro=we.TYPE,ao=ro.Number,io=ro.Delim;function oo(){this.scanner.skipWS();for(var e=this.consume(ao),t=0;t<e.length;t++){var n=e.charCodeAt(t);no(n)||46===n||this.error("Unsigned number is expected",this.scanner.tokenStart-e.length+t)}return 0===Number(e)&&this.error("Zero number is not allowed",this.scanner.tokenStart-e.length),e}var so={name:"Ratio",structure:{left:String,right:String},parse:function(){var e,t=this.scanner.tokenStart,n=oo.call(this);return this.scanner.skipWS(),this.scanner.isDelim(47)||this.error("Solidus is expected"),this.eat(io),e=oo.call(this),{type:"Ratio",loc:this.getLocation(t,this.scanner.tokenStart),left:n,right:e}},generate:function(e){this.chunk(e.left),this.chunk("/"),this.chunk(e.right)}},lo=we.TYPE,co=Fr.mode,uo=lo.LeftCurlyBracket;function ho(e){return this.Raw(e,co.leftCurlyBracket,!0)}function po(){var e=this.SelectorList();return"Raw"!==e.type&&!1===this.scanner.eof&&this.scanner.tokenType!==uo&&this.error(),e}var mo={name:"Rule",structure:{prelude:["SelectorList","Raw"],block:["Block"]},parse:function(){var e,t,n=this.scanner.tokenIndex,r=this.scanner.tokenStart;return e=this.parseRulePrelude?this.parseWithFallback(po,ho):ho.call(this,n),t=this.Block(!0),{type:"Rule",loc:this.getLocation(r,this.scanner.tokenStart),prelude:e,block:t}},generate:function(e){this.node(e.prelude),this.node(e.block)},walkContext:"rule"},fo=we.TYPE.Comma,go={name:"SelectorList",structure:{children:[["Selector","Raw"]]},parse:function(){for(var e=this.createList();!this.scanner.eof&&(e.push(this.Selector()),this.scanner.tokenType===fo);)this.scanner.next();return{type:"SelectorList",loc:this.getLocationFromList(e),children:e}},generate:function(e){this.children(e,(function(){this.chunk(",")}))},walkContext:"selector"},bo=we.TYPE.String,yo={name:"String",structure:{value:String},parse:function(){return{type:"String",loc:this.getLocation(this.scanner.tokenStart,this.scanner.tokenEnd),value:this.consume(bo)}},generate:function(e){this.chunk(e.value)}},vo=we.TYPE,ko=vo.WhiteSpace,wo=vo.Comment,xo=vo.AtKeyword,So=vo.CDO,Co=vo.CDC;function Ao(e){return this.Raw(e,null,!1)}var zo={name:"StyleSheet",structure:{children:[["Comment","CDO","CDC","Atrule","Rule","Raw"]]},parse:function(){for(var e,t=this.scanner.tokenStart,n=this.createList();!this.scanner.eof;){switch(this.scanner.tokenType){case ko:this.scanner.next();continue;case wo:if(33!==this.scanner.source.charCodeAt(this.scanner.tokenStart+2)){this.scanner.next();continue}e=this.Comment();break;case So:e=this.CDO();break;case Co:e=this.CDC();break;case xo:e=this.parseWithFallback(this.Atrule,Ao);break;default:e=this.parseWithFallback(this.Rule,Ao)}n.push(e)}return{type:"StyleSheet",loc:this.getLocation(t,this.scanner.tokenStart),children:n}},generate:function(e){this.children(e)},walkContext:"stylesheet"},Po=we.TYPE.Ident;function Lo(){this.scanner.tokenType!==Po&&!1===this.scanner.isDelim(42)&&this.error("Identifier or asterisk is expected"),this.scanner.next()}var To={name:"TypeSelector",structure:{name:String},parse:function(){var e=this.scanner.tokenStart;return this.scanner.isDelim(124)?(this.scanner.next(),Lo.call(this)):(Lo.call(this),this.scanner.isDelim(124)&&(this.scanner.next(),Lo.call(this))),{type:"TypeSelector",loc:this.getLocation(e,this.scanner.tokenStart),name:this.scanner.substrToCursor(e)}},generate:function(e){this.chunk(e.name)}},Eo=we.isHexDigit,Oo=we.cmpChar,Do=we.TYPE,Io=we.NAME,Ro=Do.Ident,No=Do.Number,Bo=Do.Dimension;function Mo(e,t){for(var n=this.scanner.tokenStart+e,r=0;n<this.scanner.tokenEnd;n++){var a=this.scanner.source.charCodeAt(n);if(45===a&&t&&0!==r)return 0===Mo.call(this,e+r+1,!1)&&this.error(),-1;Eo(a)||this.error(t&&0!==r?"HyphenMinus"+(r<6?" or hex digit":"")+" is expected":r<6?"Hex digit is expected":"Unexpected input",n),++r>6&&this.error("Too many hex digits",n)}return this.scanner.next(),r}function jo(e){for(var t=0;this.scanner.isDelim(63);)++t>e&&this.error("Too many question marks"),this.scanner.next()}function _o(e){this.scanner.source.charCodeAt(this.scanner.tokenStart)!==e&&this.error(Io[e]+" is 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expected"),this.scanner.next(),qo.call(this),{type:"UnicodeRange",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.substrToCursor(e)}},generate:function(e){this.chunk(e.value)}},Fo=we.isWhiteSpace,Uo=we.cmpStr,Yo=we.TYPE,Ho=Yo.Function,Vo=Yo.Url,Ko=Yo.RightParenthesis,Go={name:"Url",structure:{value:["String","Raw"]},parse:function(){var e,t=this.scanner.tokenStart;switch(this.scanner.tokenType){case Vo:for(var n=t+4,r=this.scanner.tokenEnd-1;n<r&&Fo(this.scanner.source.charCodeAt(n));)n++;for(;n<r&&Fo(this.scanner.source.charCodeAt(r-1));)r--;e={type:"Raw",loc:this.getLocation(n,r),value:this.scanner.source.substring(n,r)},this.eat(Vo);break;case Ho:Uo(this.scanner.source,this.scanner.tokenStart,this.scanner.tokenEnd,"url(")||this.error("Function name must be `url`"),this.eat(Ho),this.scanner.skipSC(),e=this.String(),this.scanner.skipSC(),this.eat(Ko);break;default:this.error("Url or Function is 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t=this.scanner.lookupValue(0,"odd")||this.scanner.lookupValue(0,"even")?this.Identifier():this.AnPlusB(),this.scanner.skipSC(),e&&this.scanner.lookupValue(0,"of")?(this.scanner.next(),a=this.SelectorList(),this.needPositions&&(r=this.getLastListNode(a.children).loc.end.offset)):this.needPositions&&(r=t.loc.end.offset),{type:"Nth",loc:this.getLocation(n,r),nth:t,selector:a}},generate:function(e){this.node(e.nth),null!==e.selector&&(this.chunk(" of "),this.node(e.selector))}},Number:Ni,Operator:Bi,Parentheses:qi,Percentage:Ui,PseudoClassSelector:$i,PseudoElementSelector:to,Ratio:so,Raw:Fr,Rule:mo,Selector:{name:"Selector",structure:{children:[["TypeSelector","IdSelector","ClassSelector","AttributeSelector","PseudoClassSelector","PseudoElementSelector","Combinator","WhiteSpace"]]},parse:function(){var e=this.readSequence(this.scope.Selector);return null===this.getFirstListNode(e)&&this.error("Selector is expected"),{type:"Selector",loc:this.getLocationFromList(e),children:e}},generate:function(e){this.children(e)}},SelectorList:go,String:yo,StyleSheet:zo,TypeSelector:To,UnicodeRange:Wo,Url:Go,Value:{name:"Value",structure:{children:[[]]},parse:function(){var e=this.scanner.tokenStart,t=this.readSequence(this.scope.Value);return{type:"Value",loc:this.getLocation(e,this.scanner.tokenStart),children:t}},generate:function(e){this.children(e)}},WhiteSpace:{name:"WhiteSpace",structure:{value:String},parse:function(){return this.eat($o),Qo},generate:function(e){this.chunk(e.value)}}},Zo={generic:!0,types:wr.types,atrules:wr.atrules,properties:wr.properties,node:Xo},Jo=we.cmpChar,es=we.cmpStr,ts=we.TYPE,ns=ts.Ident,rs=ts.String,as=ts.Number,is=ts.Function,os=ts.Url,ss=ts.Hash,ls=ts.Dimension,cs=ts.Percentage,us=ts.LeftParenthesis,hs=ts.LeftSquareBracket,ds=ts.Comma,ps=ts.Delim,ms=function(e){switch(this.scanner.tokenType){case ss:return this.Hash();case ds:return e.space=null,e.ignoreWSAfter=!0,this.Operator();case us:return this.Parentheses(this.readSequence,e.recognizer);case hs:return this.Brackets(this.readSequence,e.recognizer);case rs:return this.String();case ls:return this.Dimension();case cs:return this.Percentage();case as:return this.Number();case is:return es(this.scanner.source,this.scanner.tokenStart,this.scanner.tokenEnd,"url(")?this.Url():this.Function(this.readSequence,e.recognizer);case os:return this.Url();case ns:return Jo(this.scanner.source,this.scanner.tokenStart,117)&&Jo(this.scanner.source,this.scanner.tokenStart+1,43)?this.UnicodeRange():this.Identifier();case ps:var t=this.scanner.source.charCodeAt(this.scanner.tokenStart);if(47===t||42===t||43===t||45===t)return this.Operator();35===t&&this.error("Hex or identifier is 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