@oddbird/css-anchor-positioning/dist/css-anchor-positioning.umd.cjs

Polyfill for the proposed CSS anchor positioning spec

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1:this.next(),n=an.call(this);break;case 2:Pt.call(this,1,lt),this.next(),this.skipSC(),Zt.call(this,Mt),n="-"+this.consume(b);break;default:Pt.call(this,1,lt),Re.call(this,2,Mt),this.next(),n=this.substrToCursor(t+s+1)}}else if(this.tokenType===E){const s=this.charCodeAt(this.tokenStart),r=s===wt||s===lt;let o=this.tokenStart+r;for(;o<this.tokenEnd&&at(this.charCodeAt(o));o++);o===this.tokenStart+r&&this.error("Integer is expected",this.tokenStart+r),Pt.call(this,o-this.tokenStart,Pe),e=this.substring(t,o),o+1===this.tokenEnd?(this.next(),n=an.call(this)):(Pt.call(this,o-this.tokenStart+1,lt),o+2===this.tokenEnd?(this.next(),this.skipSC(),Zt.call(this,Mt),n="-"+this.consume(b)):(Re.call(this,o-this.tokenStart+2,Mt),this.next(),n=this.substrToCursor(o+1)))}else this.error();return e!==null&&e.charCodeAt(0)===wt&&(e=e.substr(1)),n!==null&&n.charCodeAt(0)===wt&&(n=n.substr(1)),{type:"AnPlusB",loc:this.getLocation(t,this.tokenStart),a:e,b:n}}function hs(t){if(t.a){const e=t.a==="+1"&&"n"||t.a==="1"&&"n"||t.a==="-1"&&"-n"||t.a+"n";if(t.b){const n=t.b[0]==="-"||t.b[0]==="+"?t.b:"+"+t.b;this.tokenize(e+n)}else this.tokenize(e)}else this.tokenize(t.b)}const ba=Object.freeze(Object.defineProperty({__proto__:null,generate:hs,name:Sa,parse:us,structure:ya},Symbol.toStringTag,{value:"Module"}));function fs(){return this.Raw(this.consumeUntilLeftCurlyBracketOrSemicolon,!0)}function xa(){for(let t=1,e;e=this.lookupType(t);t++){if(e===Qt)return!0;if(e===mt||e===V)return!1}return!1}const Ca="Atrule",wa="atrule",Aa={name:String,prelude:["AtrulePrelude","Raw",null],block:["Block",null]};function ps(t=!1){const e=this.tokenStart;let n,s,r=null,o=null;switch(this.eat(V),n=this.substrToCursor(e+1),s=n.toLowerCase(),this.skipSC(),this.eof===!1&&this.tokenType!==mt&&this.tokenType!==et&&(this.parseAtrulePrelude?r=this.parseWithFallback(this.AtrulePrelude.bind(this,n,t),fs):r=fs.call(this,this.tokenIndex),this.skipSC()),this.tokenType){case et:this.next();break;case mt:hasOwnProperty.call(this.atrule,s)&&typeof this.atrule[s].block=="function"?o=this.atrule[s].block.call(this,t):o=this.Block(xa.call(this));break}return{type:"Atrule",loc:this.getLocation(e,this.tokenStart),name:n,prelude:r,block:o}}function ds(t){this.token(V,"@"+t.name),t.prelude!==null&&this.node(t.prelude),t.block?this.node(t.block):this.token(et,";")}const Ta=Object.freeze(Object.defineProperty({__proto__:null,generate:ds,name:Ca,parse:ps,structure:Aa,walkContext:wa},Symbol.toStringTag,{value:"Module"})),va="AtrulePrelude",Ea="atrulePrelude",$a={children:[[]]};function gs(t){let e=null;return t!==null&&(t=t.toLowerCase()),this.skipSC(),hasOwnProperty.call(this.atrule,t)&&typeof this.atrule[t].prelude=="function"?e=this.atrule[t].prelude.call(this):e=this.readSequence(this.scope.AtrulePrelude),this.skipSC(),this.eof!==!0&&this.tokenType!==mt&&this.tokenType!==et&&this.error("Semicolon or block is expected"),{type:"AtrulePrelude",loc:this.getLocationFromList(e),children:e}}function ms(t){this.children(t)}const Oa=Object.freeze(Object.defineProperty({__proto__:null,generate:ms,name:va,parse:gs,structure:$a,walkContext:Ea},Symbol.toStringTag,{value:"Module"})),La=36,ks=42,Ie=61,Pa=94,ln=124,Ra=126;function Ia(){this.eof&&this.error("Unexpected end of input");const t=this.tokenStart;let e=!1;return this.isDelim(ks)?(e=!0,this.next()):this.isDelim(ln)||this.eat(d),this.isDelim(ln)?this.charCodeAt(this.tokenStart+1)!==Ie?(this.next(),this.eat(d)):e&&this.error("Identifier is expected",this.tokenEnd):e&&this.error("Vertical line is expected"),{type:"Identifier",loc:this.getLocation(t,this.tokenStart),name:this.substrToCursor(t)}}function _a(){const t=this.tokenStart,e=this.charCodeAt(t);return e!==Ie&&e!==Ra&&e!==Pa&&e!==La&&e!==ks&&e!==ln&&this.error("Attribute selector (=, ~=, ^=, $=, *=, |=) is expected"),this.next(),e!==Ie&&(this.isDelim(Ie)||this.error("Equal sign is expected"),this.next()),this.substrToCursor(t)}const Na="AttributeSelector",Da={name:"Identifier",matcher:[String,null],value:["String","Identifier",null],flags:[String,null]};function Ss(){const t=this.tokenStart;let e,n=null,s=null,r=null;return this.eat(Kt),this.skipSC(),e=Ia.call(this),this.skipSC(),this.tokenType!==ue&&(this.tokenType!==d&&(n=_a.call(this),this.skipSC(),s=this.tokenType===Tt?this.String():this.Identifier(),this.skipSC()),this.tokenType===d&&(r=this.consume(d),this.skipSC())),this.eat(ue),{type:"AttributeSelector",loc:this.getLocation(t,this.tokenStart),name:e,matcher:n,value:s,flags:r}}function ys(t){this.token(O,"["),this.node(t.name),t.matcher!==null&&(this.tokenize(t.matcher),this.node(t.value)),t.flags!==null&&this.token(d,t.flags),this.token(O,"]")}const Fa=Object.freeze(Object.defineProperty({__proto__:null,generate:ys,name:Na,parse:Ss,structure:Da},Symbol.toStringTag,{value:"Module"})),Ma=38;function bs(){return this.Raw(null,!0)}function xs(){return this.parseWithFallback(this.Rule,bs)}function Cs(){return this.Raw(this.consumeUntilSemicolonIncluded,!0)}function ja(){if(this.tokenType===et)return Cs.call(this,this.tokenIndex);const t=this.parseWithFallback(this.Declaration,Cs);return this.tokenType===et&&this.next(),t}const Ba="Block",Wa="block",Ua={children:[["Atrule","Rule","Declaration"]]};function ws(t){const e=t?ja:xs,n=this.tokenStart;let s=this.createList();this.eat(mt);t:for(;!this.eof;)switch(this.tokenType){case Qt:break t;case B:case Z:this.next();break;case V:s.push(this.parseWithFallback(this.Atrule.bind(this,t),bs));break;default:t&&this.isDelim(Ma)?s.push(xs.call(this)):s.push(e.call(this))}return this.eof||this.eat(Qt),{type:"Block",loc:this.getLocation(n,this.tokenStart),children:s}}function As(t){this.token(mt,"{"),this.children(t,e=>{e.type==="Declaration"&&this.token(et,";")}),this.token(Qt,"}")}const za=Object.freeze(Object.defineProperty({__proto__:null,generate:As,name:Ba,parse:ws,structure:Ua,walkContext:Wa},Symbol.toStringTag,{value:"Module"})),Ha="Brackets",Va={children:[[]]};function Ts(t,e){const n=this.tokenStart;let s=null;return this.eat(Kt),s=t.call(this,e),this.eof||this.eat(ue),{type:"Brackets",loc:this.getLocation(n,this.tokenStart),children:s}}function vs(t){this.token(O,"["),this.children(t),this.token(O,"]")}const Ga=Object.freeze(Object.defineProperty({__proto__:null,generate:vs,name:Ha,parse:Ts,structure:Va},Symbol.toStringTag,{value:"Module"})),qa="CDC",Ka=[];function Es(){const t=this.tokenStart;return this.eat(ot),{type:"CDC",loc:this.getLocation(t,this.tokenStart)}}function $s(){this.token(ot,"-->")}const Qa=Object.freeze(Object.defineProperty({__proto__:null,generate:$s,name:qa,parse:Es,structure:Ka},Symbol.toStringTag,{value:"Module"})),Ya="CDO",Xa=[];function Os(){const t=this.tokenStart;return this.eat(we),{type:"CDO",loc:this.getLocation(t,this.tokenStart)}}function Ls(){this.token(we,"<!--")}const Ja=Object.freeze(Object.defineProperty({__proto__:null,generate:Ls,name:Ya,parse:Os,structure:Xa},Symbol.toStringTag,{value:"Module"})),Za=46,tl="ClassSelector",el={name:String};function Ps(){return this.eatDelim(Za),{type:"ClassSelector",loc:this.getLocation(this.tokenStart-1,this.tokenEnd),name:this.consume(d)}}function Rs(t){this.token(O,"."),this.token(d,t.name)}const nl=Object.freeze(Object.defineProperty({__proto__:null,generate:Rs,name:tl,parse:Ps,structure:el},Symbol.toStringTag,{value:"Module"})),sl=43,Is=47,rl=62,il=126,ol="Combinator",al={name:String};function _s(){const t=this.tokenStart;let e;switch(this.tokenType){case B:e=" ";break;case O:switch(this.charCodeAt(this.tokenStart)){case rl:case sl:case il:this.next();break;case Is:this.next(),this.eatIdent("deep"),this.eatDelim(Is);break;default:this.error("Combinator is 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this.lookupTypeNonSC(1)===d&&dl.has(this.lookupTypeNonSC(2))?this.Feature(t):this.FeatureRange(t)}const kl={media:Ms,container:Ms,supports(){return this.SupportsDeclaration()}};function js(t="media"){const e=this.createList();t:for(;!this.eof;)switch(this.tokenType){case Z:case B:this.next();continue;case d:e.push(this.Identifier());break;case I:{let n=this.parseWithFallback(()=>kl[t].call(this,t),()=>null);n||(n=this.parseWithFallback(()=>{this.eat(I);const s=this.Condition(t);return this.eat(y),s},()=>this.GeneralEnclosed(t))),e.push(n);break}case A:{let n=this.parseWithFallback(()=>this.FeatureFunction(t),()=>null);n||(n=this.GeneralEnclosed(t)),e.push(n);break}default:break t}return e.isEmpty&&this.error("Condition is expected"),{type:"Condition",loc:this.getLocationFromList(e),kind:t,children:e}}function Bs(t){t.children.forEach(e=>{e.type==="Condition"?(this.token(I,"("),this.node(e),this.token(y,")")):this.node(e)})}const Sl=Object.freeze(Object.defineProperty({__proto__:null,generate:Bs,name:gl,parse:js,structure:ml},Symbol.toStringTag,{value:"Module"})),Ws=33,yl=35,bl=36,xl=38,Cl=42,wl=43,Us=47;function Al(){return this.Raw(this.consumeUntilExclamationMarkOrSemicolon,!0)}function Tl(){return this.Raw(this.consumeUntilExclamationMarkOrSemicolon,!1)}function vl(){const t=this.tokenIndex,e=this.Value();return e.type!=="Raw"&&this.eof===!1&&this.tokenType!==et&&this.isDelim(Ws)===!1&&this.isBalanceEdge(t)===!1&&this.error(),e}const El="Declaration",$l="declaration",Ol={important:[Boolean,String],property:String,value:["Value","Raw"]};function zs(){const t=this.tokenStart,e=this.tokenIndex,n=Ll.call(this),s=ia(n),r=s?this.parseCustomProperty:this.parseValue,o=s?Tl:Al;let a=!1,l;this.skipSC(),this.eat(J);const u=this.tokenIndex;if(s||this.skipSC(),r?l=this.parseWithFallback(vl,o):l=o.call(this,this.tokenIndex),s&&l.type==="Value"&&l.children.isEmpty){for(let i=u-this.tokenIndex;i<=0;i++)if(this.lookupType(i)===B){l.children.appendData({type:"WhiteSpace",loc:null,value:" "});break}}return this.isDelim(Ws)&&(a=Pl.call(this),this.skipSC()),this.eof===!1&&this.tokenType!==et&&this.isBalanceEdge(e)===!1&&this.error(),{type:"Declaration",loc:this.getLocation(t,this.tokenStart),important:a,property:n,value:l}}function Hs(t){this.token(d,t.property),this.token(J,":"),this.node(t.value),t.important&&(this.token(O,"!"),this.token(d,t.important===!0?"important":t.important))}function Ll(){const t=this.tokenStart;if(this.tokenType===O)switch(this.charCodeAt(this.tokenStart)){case Cl:case bl:case wl:case yl:case xl:this.next();break;case Us:this.next(),this.isDelim(Us)&&this.next();break}return this.tokenType===_?this.eat(_):this.eat(d),this.substrToCursor(t)}function Pl(){this.eat(O),this.skipSC();const t=this.consume(d);return t==="important"?!0:t}const Rl=Object.freeze(Object.defineProperty({__proto__:null,generate:Hs,name:El,parse:zs,structure:Ol,walkContext:$l},Symbol.toStringTag,{value:"Module"})),Il=38;function cn(){return this.Raw(this.consumeUntilSemicolonIncluded,!0)}const _l="DeclarationList",Nl={children:[["Declaration","Atrule","Rule"]]};function Vs(){const t=this.createList();for(;!this.eof;)switch(this.tokenType){case B:case Z:case et:this.next();break;case V:t.push(this.parseWithFallback(this.Atrule.bind(this,!0),cn));break;default:this.isDelim(Il)?t.push(this.parseWithFallback(this.Rule,cn)):t.push(this.parseWithFallback(this.Declaration,cn))}return{type:"DeclarationList",loc:this.getLocationFromList(t),children:t}}function Gs(t){this.children(t,e=>{e.type==="Declaration"&&this.token(et,";")})}const Dl=Object.freeze(Object.defineProperty({__proto__:null,generate:Gs,name:_l,parse:Vs,structure:Nl},Symbol.toStringTag,{value:"Module"})),Fl="Dimension",Ml={value:String,unit:String};function qs(){const t=this.tokenStart,e=this.consumeNumber(E);return{type:"Dimension",loc:this.getLocation(t,this.tokenStart),value:e,unit:this.substring(t+e.length,this.tokenStart)}}function Ks(t){this.token(E,t.value+t.unit)}const jl=Object.freeze(Object.defineProperty({__proto__:null,generate:Ks,name:Fl,parse:qs,structure:Ml},Symbol.toStringTag,{value:"Module"})),Bl=47,Wl="Feature",Ul={kind:String,name:String,value:["Identifier","Number","Dimension","Ratio","Function",null]};function Qs(t){const e=this.tokenStart;let n,s=null;if(this.eat(I),this.skipSC(),n=this.consume(d),this.skipSC(),this.tokenType!==y){switch(this.eat(J),this.skipSC(),this.tokenType){case b:this.lookupNonWSType(1)===O?s=this.Ratio():s=this.Number();break;case E:s=this.Dimension();break;case d:s=this.Identifier();break;case A:s=this.parseWithFallback(()=>{const r=this.Function(this.readSequence,this.scope.Value);return this.skipSC(),this.isDelim(Bl)&&this.error(),r},()=>this.Ratio());break;default:this.error("Number, dimension, ratio or identifier is expected")}this.skipSC()}return this.eof||this.eat(y),{type:"Feature",loc:this.getLocation(e,this.tokenStart),kind:t,name:n,value:s}}function Ys(t){this.token(I,"("),this.token(d,t.name),t.value!==null&&(this.token(J,":"),this.node(t.value)),this.token(y,")")}const zl=Object.freeze(Object.defineProperty({__proto__:null,generate:Ys,name:Wl,parse:Qs,structure:Ul},Symbol.toStringTag,{value:"Module"})),Hl="FeatureFunction",Vl={kind:String,feature:String,value:["Declaration","Selector"]};function Gl(t,e){const s=(this.features[t]||{})[e];return typeof s!="function"&&this.error(`Unknown feature ${e}()`),s}function Xs(t="unknown"){const e=this.tokenStart,n=this.consumeFunctionName(),s=Gl.call(this,t,n.toLowerCase());this.skipSC();const r=this.parseWithFallback(()=>{const o=this.tokenIndex,a=s.call(this);return this.eof===!1&&this.isBalanceEdge(o)===!1&&this.error(),a},()=>this.Raw(null,!1));return this.eof||this.eat(y),{type:"FeatureFunction",loc:this.getLocation(e,this.tokenStart),kind:t,feature:n,value:r}}function Js(t){this.token(A,t.feature+"("),this.node(t.value),this.token(y,")")}const ql=Object.freeze(Object.defineProperty({__proto__:null,generate:Js,name:Hl,parse:Xs,structure:Vl},Symbol.toStringTag,{value:"Module"})),Zs=47,Kl=60,tr=61,Ql=62,Yl="FeatureRange",Xl={kind:String,left:["Identifier","Number","Dimension","Ratio","Function"],leftComparison:String,middle:["Identifier","Number","Dimension","Ratio","Function"],rightComparison:[String,null],right:["Identifier","Number","Dimension","Ratio","Function",null]};function un(){switch(this.skipSC(),this.tokenType){case b:return this.isDelim(Zs,this.lookupOffsetNonSC(1))?this.Ratio():this.Number();case E:return this.Dimension();case d:return this.Identifier();case A:return this.parseWithFallback(()=>{const t=this.Function(this.readSequence,this.scope.Value);return this.skipSC(),this.isDelim(Zs)&&this.error(),t},()=>this.Ratio());default:this.error("Number, dimension, ratio or identifier is expected")}}function er(t){if(this.skipSC(),this.isDelim(Kl)||this.isDelim(Ql)){const e=this.source[this.tokenStart];return this.next(),this.isDelim(tr)?(this.next(),e+"="):e}if(this.isDelim(tr))return"=";this.error(`Expected ${t?'":", ':""}"<", ">", "=" or ")"`)}function nr(t="unknown"){const e=this.tokenStart;this.skipSC(),this.eat(I);const n=un.call(this),s=er.call(this,n.type==="Identifier"),r=un.call(this);let o=null,a=null;return this.lookupNonWSType(0)!==y&&(o=er.call(this),a=un.call(this)),this.skipSC(),this.eat(y),{type:"FeatureRange",loc:this.getLocation(e,this.tokenStart),kind:t,left:n,leftComparison:s,middle:r,rightComparison:o,right:a}}function sr(t){this.token(I,"("),this.node(t.left),this.tokenize(t.leftComparison),this.node(t.middle),t.right&&(this.tokenize(t.rightComparison),this.node(t.right)),this.token(y,")")}const Jl=Object.freeze(Object.defineProperty({__proto__:null,generate:sr,name:Yl,parse:nr,structure:Xl},Symbol.toStringTag,{value:"Module"})),Zl="Function",tc="function",ec={name:String,children:[[]]};function rr(t,e){const n=this.tokenStart,s=this.consumeFunctionName(),r=s.toLowerCase();let o;return o=e.hasOwnProperty(r)?e[r].call(this,e):t.call(this,e),this.eof||this.eat(y),{type:"Function",loc:this.getLocation(n,this.tokenStart),name:s,children:o}}function ir(t){this.token(A,t.name+"("),this.children(t),this.token(y,")")}const nc=Object.freeze(Object.defineProperty({__proto__:null,generate:ir,name:Zl,parse:rr,structure:ec,walkContext:tc},Symbol.toStringTag,{value:"Module"})),sc="GeneralEnclosed",rc={kind:String,function:[String,null],children:[[]]};function or(t){const e=this.tokenStart;let n=null;this.tokenType===A?n=this.consumeFunctionName():this.eat(I);const s=this.parseWithFallback(()=>{const r=this.tokenIndex,o=this.readSequence(this.scope.Value);return this.eof===!1&&this.isBalanceEdge(r)===!1&&this.error(),o},()=>this.createSingleNodeList(this.Raw(null,!1)));return this.eof||this.eat(y),{type:"GeneralEnclosed",loc:this.getLocation(e,this.tokenStart),kind:t,function:n,children:s}}function ar(t){t.function?this.token(A,t.function+"("):this.token(I,"("),this.children(t),this.token(y,")")}const ic=Object.freeze(Object.defineProperty({__proto__:null,generate:ar,name:sc,parse:or,structure:rc},Symbol.toStringTag,{value:"Module"})),oc="XXX",ac="Hash",lc={value:String};function lr(){const t=this.tokenStart;return this.eat(_),{type:"Hash",loc:this.getLocation(t,this.tokenStart),value:this.substrToCursor(t+1)}}function cr(t){this.token(_,"#"+t.value)}const cc=Object.freeze(Object.defineProperty({__proto__:null,generate:cr,name:ac,parse:lr,structure:lc,xxx:oc},Symbol.toStringTag,{value:"Module"})),uc="Identifier",hc={name:String};function ur(){return{type:"Identifier",loc:this.getLocation(this.tokenStart,this.tokenEnd),name:this.consume(d)}}function hr(t){this.token(d,t.name)}const fc=Object.freeze(Object.defineProperty({__proto__:null,generate:hr,name:uc,parse:ur,structure:hc},Symbol.toStringTag,{value:"Module"})),pc="IdSelector",dc={name:String};function fr(){const t=this.tokenStart;return this.eat(_),{type:"IdSelector",loc:this.getLocation(t,this.tokenStart),name:this.substrToCursor(t+1)}}function pr(t){this.token(O,"#"+t.name)}const gc=Object.freeze(Object.defineProperty({__proto__:null,generate:pr,name:pc,parse:fr,structure:dc},Symbol.toStringTag,{value:"Module"})),mc=46,kc="Layer",Sc={name:String};function dr(){let t=this.tokenStart,e=this.consume(d);for(;this.isDelim(mc);)this.eat(O),e+="."+this.consume(d);return{type:"Layer",loc:this.getLocation(t,this.tokenStart),name:e}}function gr(t){th