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Introduce equationcd as shortcut for equation + tikzcd environment #9

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Introduce equationcd as shortcut for equation + tikzcd environment #9

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35 changes: 35 additions & 0 deletions tikzlibrarycd.code.tex
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Original file line number Diff line number Diff line change
Expand Up @@ -165,6 +165,41 @@
\endtikzpicture%
\ifnum0=`{}\fi}

% Environment 'equationcd' combines equation-environment with tikzcd
\ExplSyntaxOn
\keys_define:nn { myclass / equationcd }
{
label .tl_set:N = \l_label_tl,
tikz .tl_set:N = \l_tikz_tl
}

\NewDocumentEnvironment{equationcd}{o}
{
\IfNoValueTF{#1}{}{
\keys_set:nn { myclass / equationcd } { #1 }
}
\begin{equation}%
% Set label
\tl_if_empty:NF \l_label_tl {
\label { \l_label_tl }
}

% Start tikzcd environment with custom style appended
\tl_if_empty:NTF \l_tikz_tl
{
\begin{tikzcd}
}
{
\cs_set:Npn \beginTikzcd:n ##1 { \begin{tikzcd}[ ##1 ] }
\cs_generate_variant:Nn \beginTikzcd:n { V }
\beginTikzcd:V \l_tikz_tl
}
}
{%
\end{tikzcd}\end{equation}\ignorespacesafterend%
}%
\ExplSyntaxOff

% The arrow commands
\def\tikzcd@arrow{%
\relax% this was added to avoid errors when a cell starts with \arrow, but it seems unnecessary now
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