%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% matrix.skeleton, version 1.1
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\usepgflibrary{matrix.skeleton}

\usetikzlibrary{matrix}
\usetikzlibrary{fit}
\usetikzlibrary{backgrounds}

\tikzset{
 label skeleton/.code = {
   \pgfmatrixlabelskeleton
 },
 add styling node/.style = {
   append after command = {
     \pgfextra
       \pgfinterruptpath
         % This next line is not useful in CVS. This is protection that was needed in the past for nodes.
         \setbox\tikz@figbox=\box\pgfutil@voidb@x
         #1
       \endpgfinterruptpath
     \endpgfextra
   }
 },
 style odd rows/.style = {
   label skeleton,
   add styling node = {
     \foreach \row in {1, ..., \the\pgfmatrixcurrentrow}{
       \ifodd\row
         \fitandstyle{(\tikzlastnode-row-\row)}{#1}
       \fi
     }
   }
 },
 style even rows/.style = {
   label skeleton,
   add styling node={
     \foreach \row in {1, ..., \the\pgfmatrixcurrentrow}{
       \ifodd\row
       \else
         \fitandstyle{(\tikzlastnode-row-\row)}{#1}
       \fi
     }
   }
 },
 style odd rows on layer/.style 2 args= {
   label skeleton,
   add styling node = {
     \foreach \row in {1, ..., \the\pgfmatrixcurrentrow}{
       \ifodd\row
         \fitandstyle[#1]{(\tikzlastnode-row-\row)}{#2}
       \fi
     }
   }
 },
 style even rows on layer/.style 2 args = {
   label skeleton,
   add styling node={
     \foreach \row in {1, ..., \the\pgfmatrixcurrentrow}{
       \ifodd\row
       \else
         \fitandstyle[#1]{(\tikzlastnode-row-\row)}{#2}
       \fi
     }
   }
 },
 style odd tiling rows/.style = {
   label skeleton,
   add styling node = {
     \foreach \row in {1, ..., \the\pgfmatrixcurrentrow}{
       \ifodd\row
         \fitandstyle{(\tikzlastnode-tiling-row-\row)}{#1}
       \fi
     }
   }
 },
 style even tiling rows/.style = {
   label skeleton,
   add styling node={
     \foreach \row in {1, ..., \the\pgfmatrixcurrentrow}{
       \ifodd\row
       \else
         \fitandstyle{(\tikzlastnode-tiling-row-\row)}{#1}
       \fi
     }
   }
 },
 style odd tiling rows on layer/.style 2 args= {
   label skeleton,
   add styling node = {
     \foreach \row in {1, ..., \the\pgfmatrixcurrentrow}{
       \ifodd\row
         \fitandstyle[#1]{(\tikzlastnode-tiling-row-\row)}{#2}
       \fi
     }
   }
 },
 style even tiling rows on layer/.style 2 args = {
   label skeleton,
   add styling node={
     \foreach \row in {1, ..., \the\pgfmatrixcurrentrow}{
       \ifodd\row
       \else
         \fitandstyle[#1]{(\tikzlastnode-tiling-row-\row)}{#2}
       \fi
     }
   }
 },
 style odd columns/.style = {
   label skeleton,
   add styling node = {
     \foreach \col in {1, ..., \the\pgf@matrix@numberofcolumns}{
       \ifodd\col
         \fitandstyle{(\tikzlastnode-column-\col)}{#1}
       \fi
     }
   }
 },
 style even columns/.style = {
   label skeleton,
   add styling node={
     \foreach \col in {1, ..., \the\pgf@matrix@numberofcolumns}{
       \ifodd\col
       \else
         \fitandstyle{(\tikzlastnode-column-\col)}{#1}
       \fi
     }
   }
 },
 style odd columns on layer/.style 2 args= {
   label skeleton,
   add styling node = {
     \foreach \col in {1, ..., \the\pgf@matrix@numberofcolumns}{
       \ifodd\col
         \fitandstyle[#1]{(\tikzlastnode-column-\col)}{#2}
       \fi
     }
   }
 },
 style even columns on layer/.style 2 args = {
   label skeleton,
   add styling node={
     \foreach \col in {1, ..., \the\pgf@matrix@numberofcolumns}{
       \ifodd\col
       \else
         \fitandstyle[#1]{(\tikzlastnode-column-\col)}{#2}
       \fi
     }
   }
 },
 style odd tiling columns/.style = {
   label skeleton,
   add styling node = {
     \foreach \col in {1, ..., \the\pgf@matrix@numberofcolumns}{
       \ifodd\col
         \fitandstyle{(\tikzlastnode-tiling-column-\col)}{#1}
       \fi
     }
   }
 },
 style even tiling columns/.style = {
   label skeleton,
   add styling node={
     \foreach \col in {1, ..., \the\pgf@matrix@numberofcolumns}{
       \ifodd\col
       \else
         \fitandstyle{(\tikzlastnode-tiling-column-\col)}{#1}
       \fi
     }
   }
 },
 style odd tiling columns on layer/.style 2 args= {
   label skeleton,
   add styling node = {
     \foreach \col in {1, ..., \the\pgf@matrix@numberofcolumns}{
       \ifodd\col
         \fitandstyle[#1]{(\tikzlastnode-tiling-column-\col)}{#2}
       \fi
     }
   }
 },
 style even tiling columns on layer/.style 2 args = {
   label skeleton,
   add styling node={
     \foreach \col in {1, ..., \the\pgf@matrix@numberofcolumns}{
       \ifodd\col
       \else
         \fitandstyle[#1]{(\tikzlastnode-tiling-column-\col)}{#2}
       \fi
     }
   }
 },
 style contour/.style = {%
   label skeleton,
   add styling node = {
     \stylecontour{#1}
   }
 },
 style contour on layer/.style 2 args= {%
   label skeleton,
   add styling node = {
     \pgfonlayer{#1}
       \stylecontour{#2}
     \endpgfonlayer
   }
 },
 style grid/.style = {%
   label skeleton,
   add styling node = {
     \stylegrid{#1}
   }
 },
 style grid on layer/.style 2 args= {%
   label skeleton,
   add styling node = {
     \pgfonlayer{#1}
       \stylegrid{#2}
     \endpgfonlayer
   }
 },
 style tiling grid/.style = {%
   label skeleton,
   add styling node = {
     \styletilinggrid{#1}
   }
 },
 style tiling grid on layer/.style 2 args= {%
   label skeleton,
   add styling node = {
     \pgfonlayer{#1}
       \styletilinggrid{#2}
     \endpgfonlayer
   }
 },
}

\def\fitandstyle{\@ifnextchar[{\fitandstyle@layer}{\fitandstyle@main}}
\def\fitandstyle@layer[#1]#2#3{
 \pgfonlayer{#1}
   \fitandstyle@main{#2}{#3}
 \endpgfonlayer
}
\def\fitandstyle@main#1#2{\node [fit = #1, inner sep = 0pt, #2] {};}

\def\stylecontour#1{
 \path [#1] (\tikzlastnode-row-1.north west) -- (\tikzlastnode-row-1.north east) -- (\tikzlastnode-row-\the\pgfmatrixcurrentrow.south east) -- (\tikzlastnode-row-\the\pgfmatrixcurrentrow.south west) -- cycle;
}

\def\stylegrid#1{
 \ifnum\the\pgfmatrixcurrentrow>1\relax%
   \foreach \row in {1, ..., \the\pgfmatrixcurrentrow}{
     \ifnum\row<\the\pgfmatrixcurrentrow\relax%
       \path [#1] (\tikzlastnode-inter-row-\row.west) -- (\tikzlastnode-inter-row-\row.east);
     \fi
   }
 \fi
 \ifnum\the\pgf@matrix@numberofcolumns>1\relax%
   \foreach \column in {1, ..., \the\pgf@matrix@numberofcolumns}{
     \ifnum\column<\the\pgf@matrix@numberofcolumns\relax%
       \path [#1] (\tikzlastnode-inter-column-\column.north) -- (\tikzlastnode-inter-column-\column.south);
     \fi
   }
 \fi
}

\def\styletilinggrid#1{
 \ifnum\the\pgfmatrixcurrentrow>1\relax%
   \foreach \row in {1, ..., \the\pgfmatrixcurrentrow}{
     \ifnum\row<\the\pgfmatrixcurrentrow\relax%
       \path [#1] (\tikzlastnode-tiling-row-\row.south west) -- (\tikzlastnode-tiling-row-\row.south east);
     \fi
   }
 \fi
 \ifnum\the\pgf@matrix@numberofcolumns>1\relax%
   \foreach \column in {1, ..., \the\pgf@matrix@numberofcolumns}{
     \ifnum\column<\the\pgf@matrix@numberofcolumns\relax%
       \path [#1] (\tikzlastnode-tiling-column-\column.north east) -- (\tikzlastnode-tiling-column-\column.south east);
     \fi
   }
 \fi
}

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