import { Injectable } from '@angular/core'; @Injectable({ providedIn: 'root' }) export class TlatexService { //recupere le head du doc head : string; //recupere le body du doc body : string; //position de la recherche posi:number; //Posi retour ligne latex posiReLigne :number; paragraph=false; //recupere le charactere retour ligne latex charReLigne : string; constructor() { } /********************************* * traiter latex *********************************/ traiterLatex(data:string):string { // let lg = this.longChaine("\\begin{document}"); //recherche le debut du document let debTexte = data.indexOf("\\begin{document}"); //recupere le head du doc this.head = data.slice(0,debTexte); //recupere le body du doc this.body = data.slice(debTexte+lg); //position de la recherche this.posi = 0; //recupere le charactere retour ligne latex this.posiReLigne = this.head.indexOf('}')+1; this.charReLigne = this.head.charAt(this.posiReLigne); //recupere les instruction head this.traiterInstHead(); this.nettoyerBody(); // this.chargescript(); let re = new RegExp(this.charReLigne, 'g'); this.head = this.head.replace(re,'
'); return this.body;//body; } /************************************ * traite les instructions du head ***********************************/ traiterInstHead(){ let nwc = "\\newcommand"; let cnt = "\\newcounter"; let lgnwc = nwc.length; let lgcnt = cnt.length; let posinwc = 1; let posicnt = 1; let boucle=12; posinwc = this.head.indexOf(nwc,this.posi+1); this.posi = posinwc+lgnwc; while (posinwc>0) { this.newcommand(); posinwc = this.head.indexOf(nwc,this.posi+1); this.posi = posinwc+lgnwc; }//fin while }//fin traiter /******************************************* * newcommand ****************************************/ newcommand() { let tagchercher = this.entreacco(); let tagnouveau = this.entreacco(); if(tagnouveau!="0") { this.head = this.remplace(this.head,tagchercher+"{",tagnouveau+"{",this.posi); if(this.paragraph==false) { this.body = this.remplace(this.body,tagchercher,tagnouveau,0); } else { this.paragraph=false; this.body = this.remplace(this.body,tagchercher,"

"+tagnouveau+"

",0); } this.posi--; //alert(this.posi+' '+tagchercher+' '+tagnouveau); } }//fin newcommand /******************************************* * recherche et remplace tag dans texte ****************************************/ remplace(texte:string,tagchercher:string,tagnouveau:string,positag=0):string{ positag = texte.indexOf(tagchercher,positag); while (positag>0) { texte = this.insert(texte,tagnouveau,positag,tagchercher.length); positag = texte.indexOf(tagchercher,positag+1); } return texte; } /******************************************* * renvoie la chaine entre les accolades ****************************************/ entreacco() { //let accoo = 0; //let accof = 0; let caract =""; let numacco = 0; let nonslash = true; let tag =""; let nbmax=50; do { caract = this.head[this.posi]; console.log(caract); if(caract=="\\") { nonslash = false; tag+=caract; } else if(caract=='{') { if(nonslash) { numacco++; if(numacco!=1) tag+=caract; } else { tag+=caract; nonslash=true; } } else if(caract=='}') { if(nonslash) {numacco--; if(numacco!=0) tag+=caract; } else { nonslash=true; tag+=caract; } } else if(caract==this.charReLigne) { numacco=-1; } else if(caract== '[') { numacco=-2; } else { tag+=caract; nonslash=true; } this.posi++; nbmax--; } while((numacco>0)&&(nbmax>0)); if(numacco==-2) { //recherche la balise paragraph this.paragraph=true; let balise = "\\paragraph{"; let posipara = this.head.indexOf(balise,this.posi); if (posipara>0) { let accof = this.head.indexOf('}',posipara+balise.length); tag = this.head.slice(posipara+balise.length,accof); numacco=0; //alert(tag); } } if(numacco==0) { return tag; } else { return "0"; } }//fin entreacco /************************************** * Remplacer les tag du body ******************************************/ nettoyerBody() { this.body = this.body.replace(/\\hfill\{([^\}]+)\}/g,'

$1

'); this.body = this.body.replace(/\\LARGE/g,''); this.body = this.body.replace(/\\medskip/g,'
  '); this.body = this.body.replace(/\\noindent/g,'
  '); this.body = this.body.replace(/\\bf/g,''); this.body = this.body.replace(/\\section\{([^\}]+)\}/g,'

$1

'); this.body = this.body.replace(/\\subsection\{([^\}]+)\}/g,'

$1

'); this.body = this.body.replace(/%[^\n]*(?=\n)/g,""); // remove LaTeX comments this.body = this.body.replace(/\\vspace[^\n]*(?=\n)/g,""); //remove comments this.body = this.body.replace(/\\hfill([^\}]+)\n/g,'

$1

'); this.body = this.body.replace(/\\item\[(\w+)\]/g,"

$1"); //begin this.body = this.body.replace(/\\item/g,"

"); //this.body = this.body.replace(/\\begin\{EX\}(\S+?)\\end\{EX\}/g,''); this.body = this.body.replace(/\\begin\{EX\}/g,'
Ex
'); this.body = this.body.replace(/\\end\{EX\}/g,'
fin Ex

'); //this.effaceEntre2tag("\\begin{EX}","\\end{EX}"); //item ul ol //this.tagbeginend('\\begin{itemize}','

','\\end{itemize}','

'); //this.tagbeginend('\\begin{tabular}','

','\\end{tabular}','

'); this.body = this.body.replace(/\\begin\{itemize\}/g,''); this.body = this.body.replace(/\\end\{itemize\}/g,'

'); //tableau tabular //this.body = this.body.replace(/^\[[^\[]+\]/g,''); //this.tagbeginend('\\begin{tabular}','\n\n

' , '\\end{enumerate}' , '

'); //this.body = this.body.replace(/&/g,''); //this.body = this.body.replace(/\\\\\s/g,"\n"); this.body = this.body.replace(/\\caption\{([^\}]+)\}/g,'

$1

'); //let regex2 = /\$(\S+?)\$/g; // you need ()-brackets to get $1 //this.body = this.body.replace(regex2, '\\\($1\\\)'); // $1 = first () = highlight let posibody=this.body.indexOf('$');; let ouvaco = true; while(posibody>0) { if(ouvaco) { this.body = this.insert(this.body,"\\(",posibody,1); ouvaco = false; } else { this.body = this.insert(this.body,"\\)",posibody,1); ouvaco = true; } posibody = this.body.indexOf('$',posibody+1); } }//fin nettoyerBody /********************************************************** *gestion des tags begin end *************************************/ tagbeginend(tag,taghtml,tagf,taghtml1) { let lgtag = tag.length; let lgtagf = tagf.length; //gere si 2 retour ligne ou tag end let positagf1=0; let positagf2=0; let posibody=this.body.indexOf(tag); while(posibody>0) { this.body = this.insert(this.body,taghtml,posibody,lgtag); positagf1 = this.body.indexOf(tagf,posibody+lgtag); positagf2 = this.body.indexOf(this.charReLigne+this.charReLigne,posibody+lgtag); if(positagf1==-1||positagf20) { let posifin = this.body.indexOf(tagfin)+tagfin.length ; this.body= this.body.substring(0,posideb)+"
aaaaa
"+this.body.slice(posifin); posideb = this.body.indexOf(tagdeb); } } longChaine(texte : string):number { return texte.length; } chargescript(){ var head = document.getElementsByTagName("head")[0], script; script = document.createElement("script"); script.type = "text/x-mathjax-config"; script[(window? "innerHTML" : "text")] = "MathJax.Hub.Config({\n" + " tex2jax: { inlineMath: [['$','$'], ['\\\\(','\\\\)']], processEscapes: true }\n" + ", TeX: { extensions: ['color.js'], equationNumbers: { autoNumber: 'AMS' } }\n" + "});" head.appendChild(script); script = document.createElement("script"); script.type = "text/javascript"; script.src = "https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js?config=TeX-AMS-MML_HTMLorMML"; //TeX-AMS_CHTML or edit previous line for any other cdn or local mathjax installation head.appendChild(script); } }