/**!
* @author obedm503
* @git https://github.com/obedm503/showdown-katex.git
* @examples https://obedm503.github.io/showdown-katex/
* @license MIT
*/
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pn={"́":{text:"\\'",math:"\\acute"},"̀":{text:"\\`",math:"\\grave"},"̈":{text:'\\"',math:"\\ddot"},"̃":{text:"\\~",math:"\\tilde"},"̄":{text:"\\=",math:"\\bar"},"̆":{text:"\\u",math:"\\breve"},"̌":{text:"\\v",math:"\\check"},"̂":{text:"\\^",math:"\\hat"},"̇":{text:"\\.",math:"\\dot"},"̊":{text:"\\r",math:"\\mathring"},"̋":{text:"\\H"}},dn={"á":"á","à":"à","ä":"ä","ǟ":"ǟ","ã":"ã","ā":"ā","ă":"ă","ắ":"ắ","ằ":"ằ","ẵ":"ẵ","ǎ":"ǎ","â":"â","ấ":"ấ","ầ":"ầ","ẫ":"ẫ","ȧ":"ȧ","ǡ":"ǡ","å":"å","ǻ":"ǻ","ḃ":"ḃ","ć":"ć","č":"č","ĉ":"ĉ","ċ":"ċ","ď":"ď","ḋ":"ḋ","é":"é","è":"è","ë":"ë","ẽ":"ẽ","ē":"ē","ḗ":"ḗ","ḕ":"ḕ","ĕ":"ĕ","ě":"ě","ê":"ê","ế":"ế","ề":"ề","ễ":"ễ","ė":"ė","ḟ":"ḟ","ǵ":"ǵ","ḡ":"ḡ","ğ":"ğ","ǧ":"ǧ","ĝ":"ĝ","ġ":"ġ","ḧ":"ḧ","ȟ":"ȟ","ĥ":"ĥ","ḣ":"ḣ","í":"í","ì":"ì","ï":"ï","ḯ":"ḯ","ĩ":"ĩ","ī":"ī","ĭ":"ĭ","ǐ":"ǐ","î":"î","ǰ":"ǰ","ĵ":"ĵ","ḱ":"ḱ","ǩ":"ǩ","ĺ":"ĺ","ľ":"ľ","ḿ":"ḿ","ṁ":"ṁ","ń":"ń","ǹ":"ǹ","ñ":"ñ","ň":"ň","ṅ":"ṅ","ó":"ó","ò":"ò","ö":"ö","ȫ":"ȫ","õ":"õ","ṍ":"ṍ","ṏ":"ṏ","ȭ":"ȭ","ō":"ō","ṓ":"ṓ","ṑ":"ṑ","ŏ":"ŏ","ǒ":"ǒ","ô":"ô","ố":"ố","ồ":"ồ","ỗ":"ỗ","ȯ":"ȯ","ȱ":"ȱ","ő":"ő","ṕ":"ṕ","ṗ":"ṗ","ŕ":"ŕ","ř":"ř","ṙ":"ṙ","ś":"ś","ṥ":"ṥ","š":"š","ṧ":"ṧ","ŝ":"ŝ","ṡ":"ṡ","ẗ":"ẗ","ť":"ť","ṫ":"ṫ","ú":"ú","ù":"ù","ü":"ü","ǘ":"ǘ","ǜ":"ǜ","ǖ":"ǖ","ǚ":"ǚ","ũ":"ũ","ṹ":"ṹ","ū":"ū","ṻ":"ṻ","ŭ":"ŭ","ǔ":"ǔ","û":"û","ů":"ů","ű":"ű","ṽ":"ṽ","ẃ":"ẃ","ẁ":"ẁ","ẅ":"ẅ","ŵ":"ŵ","ẇ":"ẇ","ẘ":"ẘ","ẍ":"ẍ","ẋ":"ẋ","ý":"ý","ỳ":"ỳ","ÿ":"ÿ","ỹ":"ỹ","ȳ":"ȳ","ŷ":"ŷ","ẏ":"ẏ","ẙ":"ẙ","ź":"ź","ž":"ž","ẑ":"ẑ","ż":"ż","Á":"Á","À":"À","Ä":"Ä","Ǟ":"Ǟ","Ã":"Ã","Ā":"Ā","Ă":"Ă","Ắ":"Ắ","Ằ":"Ằ","Ẵ":"Ẵ","Ǎ":"Ǎ","Â":"Â","Ấ":"Ấ","Ầ":"Ầ","Ẫ":"Ẫ","Ȧ":"Ȧ","Ǡ":"Ǡ","Å":"Å","Ǻ":"Ǻ","Ḃ":"Ḃ","Ć":"Ć","Č":"Č","Ĉ":"Ĉ","Ċ":"Ċ","Ď":"Ď","Ḋ":"Ḋ","É":"É","È":"È","Ë":"Ë","Ẽ":"Ẽ","Ē":"Ē","Ḗ":"Ḗ","Ḕ":"Ḕ","Ĕ":"Ĕ","Ě":"Ě","Ê":"Ê","Ế":"Ế","Ề":"Ề","Ễ":"Ễ","Ė":"Ė","Ḟ":"Ḟ","Ǵ":"Ǵ","Ḡ":"Ḡ","Ğ":"Ğ","Ǧ":"Ǧ","Ĝ":"Ĝ","Ġ":"Ġ","Ḧ":"Ḧ","Ȟ":"Ȟ","Ĥ":"Ĥ","Ḣ":"Ḣ","Í":"Í","Ì":"Ì","Ï":"Ï","Ḯ":"Ḯ","Ĩ":"Ĩ","Ī":"Ī","Ĭ":"Ĭ","Ǐ":"Ǐ","Î":"Î","İ":"İ","Ĵ":"Ĵ","Ḱ":"Ḱ","Ǩ":"Ǩ","Ĺ":"Ĺ","Ľ":"Ľ","Ḿ":"Ḿ","Ṁ":"Ṁ","Ń":"Ń","Ǹ":"Ǹ","Ñ":"Ñ","Ň":"Ň","Ṅ":"Ṅ","Ó":"Ó","Ò":"Ò","Ö":"Ö","Ȫ":"Ȫ","Õ":"Õ","Ṍ":"Ṍ","Ṏ":"Ṏ","Ȭ":"Ȭ","Ō":"Ō","Ṓ":"Ṓ","Ṑ":"Ṑ","Ŏ":"Ŏ","Ǒ":"Ǒ","Ô":"Ô","Ố":"Ố","Ồ":"Ồ","Ỗ":"Ỗ","Ȯ":"Ȯ","Ȱ":"Ȱ","Ő":"Ő","Ṕ":"Ṕ","Ṗ":"Ṗ","Ŕ":"Ŕ","Ř":"Ř","Ṙ":"Ṙ","Ś":"Ś","Ṥ":"Ṥ","Š":"Š","Ṧ":"Ṧ","Ŝ":"Ŝ","Ṡ":"Ṡ","Ť":"Ť","Ṫ":"Ṫ","Ú":"Ú","Ù":"Ù","Ü":"Ü","Ǘ":"Ǘ","Ǜ":"Ǜ","Ǖ":"Ǖ","Ǚ":"Ǚ","Ũ":"Ũ","Ṹ":"Ṹ","Ū":"Ū","Ṻ":"Ṻ","Ŭ":"Ŭ","Ǔ":"Ǔ","Û":"Û","Ů":"Ů","Ű":"Ű","Ṽ":"Ṽ","Ẃ":"Ẃ","Ẁ":"Ẁ","Ẅ":"Ẅ","Ŵ":"Ŵ","Ẇ":"Ẇ","Ẍ":"Ẍ","Ẋ":"Ẋ","Ý":"Ý","Ỳ":"Ỳ","Ÿ":"Ÿ","Ỹ":"Ỹ","Ȳ":"Ȳ","Ŷ":"Ŷ","Ẏ":"Ẏ","Ź":"Ź","Ž":"Ž","Ẑ":"Ẑ","Ż":"Ż","ά":"ά","ὰ":"ὰ","ᾱ":"ᾱ","ᾰ":"ᾰ","έ":"έ","ὲ":"ὲ","ή":"ή","ὴ":"ὴ","ί":"ί","ὶ":"ὶ","ϊ":"ϊ","ΐ":"ΐ","ῒ":"ῒ","ῑ":"ῑ","ῐ":"ῐ","ό":"ό","ὸ":"ὸ","ύ":"ύ","ὺ":"ὺ","ϋ":"ϋ","ΰ":"ΰ","ῢ":"ῢ","ῡ":"ῡ","ῠ":"ῠ","ώ":"ώ","ὼ":"ὼ","Ύ":"Ύ","Ὺ":"Ὺ","Ϋ":"Ϋ","Ῡ":"Ῡ","Ῠ":"Ῠ","Ώ":"Ώ","Ὼ":"Ὼ"};class fn{constructor(t,e){this.mode=void 0,this.gullet=void 0,this.settings=void 0,this.leftrightDepth=void 0,this.nextToken=void 0,this.mode="math",this.gullet=new un(t,e,this.mode),this.settings=e,this.leftrightDepth=0}expect(t,e){if(void 0===e&&(e=!0),this.fetch().text!==t)throw new l(`Expected '${t}', got '${this.fetch().text}'`,this.fetch());e&&this.consume()}consume(){this.nextToken=null}fetch(){return null==this.nextToken&&(this.nextToken=this.gullet.expandNextToken()),this.nextToken}switchMode(t){this.mode=t,this.gullet.switchMode(t)}parse(){this.gullet.beginGroup(),this.settings.colorIsTextColor&&this.gullet.macros.set("\\color","\\textcolor");const t=this.parseExpression(!1);return this.expect("EOF"),this.gullet.endGroup(),t}parseExpression(t,e){const r=[];for(;;){"math"===this.mode&&this.consumeSpaces();const n=this.fetch();if(-1!==fn.endOfExpression.indexOf(n.text))break;if(e&&n.text===e)break;if(t&&Kr[n.text]&&Kr[n.text].infix)break;const o=this.parseAtom(e);if(!o)break;r.push(o)}return"text"===this.mode&&this.formLigatures(r),this.handleInfixNodes(r)}handleInfixNodes(t){let e,r=-1;for(let n=0;t.length>n;n++){const o=Et(t[n],"infix");if(o){if(-1!==r)throw new l("only one infix operator per group",o.token);r=n,e=o.replaceWith}}if(-1!==r&&e){let n,o;const a=t.slice(0,r),i=t.slice(r+1);let s;return n=1===a.length&&"ordgroup"===a[0].type?a[0]:{type:"ordgroup",mode:this.mode,body:a},o=1===i.length&&"ordgroup"===i[0].type?i[0]:{type:"ordgroup",mode:this.mode,body:i},s=this.callFunction(e,"\\\\abovefrac"===e?[n,t[r],o]:[n,o],[]),[s]}return t}handleSupSubscript(t){const e=this.fetch(),r=e.text;this.consume();const n=this.parseGroup(t,!1,fn.SUPSUB_GREEDINESS,void 0,void 0,!0);if(!n)throw new l("Expected group after '"+r+"'",e);return n}formatUnsupportedCmd(t){const e=[];for(let r=0;t.length>r;r++)e.push({type:"textord",mode:"text",text:t[r]});return{type:"color",mode:this.mode,color:this.settings.errorColor,body:[{type:"text",mode:this.mode,body:e}]}}parseAtom(t){const e=this.parseGroup("atom",!1,null,t);if("text"===this.mode)return e;let r,n;for(;;){this.consumeSpaces();const t=this.fetch();if("\\limits"===t.text||"\\nolimits"===t.text){let r=Et(e,"op");if(r){r.limits="\\limits"===t.text,r.alwaysHandleSupSub=!0}else{if(r=Et(e,"operatorname"),!r||!r.alwaysHandleSupSub)throw new l("Limit controls must follow a math operator",t);r.limits="\\limits"===t.text}this.consume()}else if("^"===t.text){if(r)throw new l("Double superscript",t);r=this.handleSupSubscript("superscript")}else if("_"===t.text){if(n)throw new l("Double subscript",t);n=this.handleSupSubscript("subscript")}else{if("'"!==t.text)break;{if(r)throw new l("Double superscript",t);const e={type:"textord",mode:this.mode,text:"\\prime"},n=[e];for(this.consume();"'"===this.fetch().text;)n.push(e),this.consume();"^"===this.fetch().text&&n.push(this.handleSupSubscript("superscript")),r={type:"ordgroup",mode:this.mode,body:n}}}}return r||n?{type:"supsub",mode:this.mode,base:e,sup:r,sub:n}:e}parseFunction(t,e,r){const n=this.fetch(),o=n.text,a=Kr[o];if(!a)return null;if(this.consume(),null!=r&&r>=a.greediness)throw new l("Got function '"+o+"' with no arguments"+(e?" as "+e:""),n);if("text"===this.mode&&!a.allowedInText)throw new l("Can't use function '"+o+"' in text mode",n);if("math"===this.mode&&!1===a.allowedInMath)throw new l("Can't use function '"+o+"' in math mode",n);const i=this.parseArguments(o,a);return this.callFunction(o,i.args,i.optArgs,n,t)}callFunction(t,e,r,n,o){const a=Kr[t];if(a&&a.handler)return a.handler({funcName:t,parser:this,token:n,breakOnTokenText:o},e,r);throw new l(`No function handler for ${t}`)}parseArguments(t,e){const r=e.numArgs+e.numOptionalArgs;if(0===r)return{args:[],optArgs:[]};const n=e.greediness,o=[],a=[];for(let i=0;r>i;i++){const r=e.numOptionalArgs>i,s=this.parseGroupOfType(`argument to '${t}'`,e.argTypes&&e.argTypes[i],r,n,i>0&&!r||0===i&&!r&&"math"===this.mode);if(!s){if(r){a.push(null);continue}throw new l(`Expected group after '${t}'`,this.fetch())}(r?a:o).push(s)}return{args:o,optArgs:a}}parseGroupOfType(t,e,r,n,o){switch(e){case"color":return o&&this.consumeSpaces(),this.parseColorGroup(r);case"size":return o&&this.consumeSpaces(),this.parseSizeGroup(r);case"url":return this.parseUrlGroup(r,o);case"math":case"text":return this.parseGroup(t,r,n,void 0,e,o);case"hbox":{const e=this.parseGroup(t,r,n,void 0,"text",o);return e?{type:"styling",mode:e.mode,body:[e],style:"text"}:e}case"raw":{if(o&&this.consumeSpaces(),r&&"{"===this.fetch().text)return null;const t=this.parseStringGroup("raw",r,!0);if(t)return{type:"raw",mode:"text",string:t.text};throw new l("Expected raw group",this.fetch())}case"original":case null:case void 0:return this.parseGroup(t,r,n,void 0,void 0,o);default:throw new l("Unknown group type as "+t,this.fetch())}}consumeSpaces(){for(;" "===this.fetch().text;)this.consume()}parseStringGroup(t,e,r){const n=e?"[":"{",o=e?"]":"}",a=this.fetch();if(a.text!==n){if(e)return null;if(r&&"EOF"!==a.text&&/[^{}[\]]/.test(a.text))return this.consume(),a}const i=this.mode;this.mode="text",this.expect(n);let s="";const h=this.fetch();let m,c=0,u=h;for(;(m=this.fetch()).text!==o||r&&c>0;){switch(m.text){case"EOF":throw new l("Unexpected end of input in "+t,h.range(u,s));case n:c++;break;case o:c--}u=m,s+=u.text,this.consume()}return this.expect(o),this.mode=i,h.range(u,s)}parseRegexGroup(t,e){const r=this.mode;this.mode="text";const n=this.fetch();let o,a=n,i="";for(;"EOF"!==(o=this.fetch()).text&&t.test(i+o.text);)a=o,i+=a.text,this.consume();if(""===i)throw new l("Invalid "+e+": '"+n.text+"'",n);return this.mode=r,n.range(a,i)}parseColorGroup(t){const e=this.parseStringGroup("color",t);if(!e)return null;const r=/^(#[a-f0-9]{3}|#?[a-f0-9]{6}|[a-z]+)$/i.exec(e.text);if(!r)throw new l("Invalid color: '"+e.text+"'",e);let n=r[0];return/^[0-9a-f]{6}$/i.test(n)&&(n="#"+n),{type:"color-token",mode:this.mode,color:n}}parseSizeGroup(t){let e,r=!1;if(e=t||"{"===this.fetch().text?this.parseStringGroup("size",t):this.parseRegexGroup(/^[-+]? *(?:$|\d+|\d+\.\d*|\.\d*) *[a-z]{0,2} *$/,"size"),!e)return null;t||0!==e.text.length||(e.text="0pt",r=!0);const n=/([-+]?) *(\d+(?:\.\d*)?|\.\d+) *([a-z]{2})/.exec(e.text);if(!n)throw new l("Invalid size: '"+e.text+"'",e);const o={number:+(n[1]+n[2]),unit:n[3]};if(!vt(o))throw new l("Invalid unit: '"+o.unit+"'",e);return{type:"size",mode:this.mode,value:o,isBlank:r}}parseUrlGroup(t,e){this.gullet.lexer.setCatcode("%",13);const r=this.parseStringGroup("url",t,!0);if(this.gullet.lexer.setCatcode("%",14),!r)return null;const n=r.text.replace(/\\([#$%&~_^{}])/g,"$1");return{type:"url",mode:this.mode,url:n}}parseGroup(t,e,r,n,o,a){const s=this.mode;o&&this.switchMode(o),a&&this.consumeSpaces();const h=this.fetch(),m=h.text;let c;if(e?"["===m:"{"===m||"\\begingroup"===m){this.consume();const t=fn.endOfGroup[m];this.gullet.beginGroup();const e=this.parseExpression(!1,t),r=this.fetch();this.expect(t),this.gullet.endGroup(),c={type:"ordgroup",mode:this.mode,loc:i.range(h,r),body:e,semisimple:"\\begingroup"===m||void 0}}else if(e)c=null;else if(c=this.parseFunction(n,t,r)||this.parseSymbol(),null==c&&"\\"===m[0]&&!cn.hasOwnProperty(m)){if(this.settings.throwOnError)throw new l("Undefined control sequence: "+m,h);c=this.formatUnsupportedCmd(m),this.consume()}return o&&this.switchMode(s),c}formLigatures(t){let e=t.length-1;for(let r=0;e>r;++r){const n=t[r],o=n.text;"-"===o&&"-"===t[r+1].text&&(e>r+1&&"-"===t[r+2].text?(t.splice(r,3,{type:"textord",mode:"text",loc:i.range(n,t[r+2]),text:"---"}),e-=2):(t.splice(r,2,{type:"textord",mode:"text",loc:i.range(n,t[r+1]),text:"--"}),e-=1)),"'"!==o&&"`"!==o||t[r+1].text!==o||(t.splice(r,2,{type:"textord",mode:"text",loc:i.range(n,t[r+1]),text:o+o}),e-=1)}}parseSymbol(){const t=this.fetch();let e=t.text;if(/^\\verb[^a-zA-Z]/.test(e)){this.consume();let t=e.slice(5);const r="*"===t.charAt(0);if(r&&(t=t.slice(1)),2>t.length||t.charAt(0)!==t.slice(-1))throw new l("\\verb assertion failed --\n please report what input caused this bug");return t=t.slice(1,-1),{type:"verb",mode:"text",body:t,star:r}}dn.hasOwnProperty(e[0])&&!j[this.mode][e[0]]&&(this.settings.strict&&"math"===this.mode&&this.settings.reportNonstrict("unicodeTextInMathMode",`Accented Unicode text character "${e[0]}" used in `+"math mode",t),e=dn[e[0]]+e.substr(1));const r=Qr.exec(e);let 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* @preserve
Based on ASCIIMathTeXImg.js but now part of https://github.com/obedm503/showdown-katex
Based on ASCIIMathML, Version 1.4.7 Aug 30, 2005, (c) Peter Jipsen http://www.chapman.edu/~jipsen
Modified with TeX conversion for IMG rendering Sept 6, 2006 (c) David Lippman http://www.pierce.ctc.edu/dlippman
Updated to match ver 2.2 Mar 3, 2014
Latest at https://github.com/mathjax/asciimathml
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the 'Software'), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
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