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%%%
% Codage RLE
%%%
\setKVdefault[RLE]{Largeur=10pt,Taille=5,Unite=1cm,Solution=false,Enonce=true}

\newtoks\toklisterle
\def\UpdatetoksRLE#1\nil{\addtotok\toklisterle{#1,}}%

%\newlength\PfCRLEHeight%
\NewDocumentCommand\CodageRLE{o m}{%
  \useKVdefault[RLE]%
  \setKV[RLE]{#1}%
  %\setlength{\PfCRLEHeight}{\useKV[RLE]{Largeur}}%
  \setsepchar{,}%
  \readlist*\PfCListeRLE{#2}%
  \toklisterle{}%
  \foreachitem\compteur\in\PfCListeRLE{\expandafter\UpdatetoksRLE\compteur\nil}%
  \BuildRLE{\the\toklisterle}%
}

\def\BuildRLECode{%
  Taille:=\useKV[RLE]{Taille};
  u:=\useKV[RLE]{Unite};
  boolean Solution,Enonce;
  Solution:=\useKV[RLE]{Solution};
  Enonce:=\useKV[RLE]{Enonce};
  %  
  color RLEFill;
  RLEFill=white;
  %
  numeric nbretenir[][];
  %
  vardef NombreLigne(text t)=
  retiens:=0;
  nblignes:=0;
  for p_=t:
  retiens:=retiens+p_;
  if retiens=Taille:
  nblignes:=nblignes+1;
  retiens:=0;
  fi;
  endfor;
  enddef;
  %
  path Square;
  Square=unitsquare scaled u;
  %
  vardef RLE(text t)=
  nbcoups:=0;
  nbcases:=0;
  nbcaseslignes:=0;
  cptretiensnb:=0;
  cptretiensnblignes:=1;
  for p_=t:
  if p_=0:
  cptretiensnb:=cptretiensnb+1;
  nbretenir[cptretiensnblignes][cptretiensnb]=p_;
  RLEFill:=black;
  else:
  nbcoups:=nbcoups+1;
  for l=0 upto p_-1:
  if Solution: fill ((Square scaled 0.95) shifted(u*((nbcases mod Taille)+l,-(nbcases div Taille))+u*(0.025,0.025))) withcolor RLEFill; fi;
  trace (Square shifted(u*((nbcases mod Taille)+l,-(nbcases div Taille))));
  endfor;
  nbcaseslignes:=nbcaseslignes+p_;
  nbcases:=nbcases+p_;
  if (nbcaseslignes mod Taille)=0:
  RLEFill:=white;
  cptretiensnb:=cptretiensnb+1;
  nbretenir[cptretiensnblignes][cptretiensnb]=p_;
  cptretiensnblignes:=cptretiensnblignes+1;
  cptretiensnb:=0;
  else:
  if RLEFill=white: RLEFill:=black else: RLEFill:=white fi;
  cptretiensnb:=cptretiensnb+1;
  nbretenir[cptretiensnblignes][cptretiensnb]=p_;
  fi;
  fi;
  endfor;
  enddef;
  % 
  string Sequence[];
  % 
  boolean STOP;
  STOP:=false;
  %
  vardef Affichage=
  for k=1 upto nblignes:
  Sequence[k]=decimal(nbretenir[k][1]);
  n:=1;
  forever:
  n:=n+1;
  if unknown nbretenir[k][n]:
  STOP:=true;
  else:
  Sequence[k]:=Sequence[k]&","&decimal(nbretenir[k][n]);
  fi;
  exitif STOP;
  endfor;
  label.rt(TEX(Sequence[k]),u*(Taille+1,-k+1+0.5));
  STOP:=false;
  endfor;
  enddef;
  %
  vardef AffichagePDF=
  for k=1 upto nblignes:
  Sequence[k]=decimal(nbretenir[k][1]);
  n:=1;
  forever:
  n:=n+1;
  if unknown nbretenir[k][n]:
  STOP:=true;
  else:
  Sequence[k]:=Sequence[k]&","&decimal(nbretenir[k][n]);
  fi;
  exitif STOP;
  endfor;
  label.rt(LATEX(Sequence[k]),u*(Taille+1,-k+1+0.5));
  STOP:=false;
  endfor;
  enddef;
}

\NewDocumentCommand\BuildRLE{m}{%
  \ifluatex
  \mplibforcehmode
  \begin{mplibcode}
    \BuildRLECode    
    NombreLigne(#1);
    RLE(#1);
    if Enonce:
    Affichage;
    fi;
  \end{mplibcode}
  \else
  \begin{mpost}[mpsettings={\BuildRLECode}]
    NombreLigne(#1);
    RLE(#1);
    if Enonce:
    AffichagePDF;
    fi;    
  \end{mpost}
  \fi
}