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%% ---------------------------------------------------------------
%% The typoaid package --- 
%% Maintained by Daniele Ratti
%% E-mail: ilfuria+tya@gmail.com
%% Released under the LaTeX Project Public License v1.3c or later
%% See http://www.latex-project.org/lppl.txt
%% ---------------------------------------------------------------

\RequirePackage{expl3}
\ProvidesExplPackage{typoaid}{2017/04/21}{0.0.7} {Typographical Aid}
\RequirePackage{xparse}

%%\ExplSyntaxOn
%%\newlength{\typ@@id}

\dim_new:N \l__typoAid_Alphabet_dim

\dim_new:N\l__typoAid_ExHeight_dim

\dim_new:N\l__typoAid_EmWidth_dim

\box_new:N\l__typoAid_Alphabet_box

\str_const:Nx\l__typoAid_typeout_string{TypoAid\iow_newline: *~Font~switch~given:~}

%% abcdefghijklmnopqrstuvwxyz
%%{a{}b{}c{}d{}e{}f{}g{}h{}i{}j{}k{}l{}m{}n{}o{}p{}q{}r{}s{}t{}u{}v{}w{}x{}y{}z{}}

\cs_set_nopar:Npn\_typoAid_typoAlphabet:n #1 {%
       	\box_gclear:N\l__typoAid_Alphabet_box
	\hbox_set:Nn\l__typoAid_Alphabet_box{#1a{}b{}c{}d{}e{}f{}g{}h{}i{}j{}k{}l{}m{}n{}o{}p{}q{}r{}s{}t{}u{}v{}w{}x{}y{}z{}}}

\cs_set_nopar:Npn\_typoAid_incrCntr:n #1 {%
	\_typoAid_typoAlphabet:n{#1}	
	\dim_set:Nn\l__typoAid_Alphabet_dim{\box_wd:N\l__typoAid_Alphabet_box}
}

\cs_set_nopar:Npn\_typoAid_calcEx:n #1{%
	\group_begin:
		#1
		\dim_gset:Nn\l__typoAid_ExHeight_dim{\dim_eval:n{1ex}}
	\group_end:
}

\cs_set_nopar:Npn\_typoAid_calcEm:n#1{
	\group_begin:
		#1
		\dim_gset:Nn\l__typoAid_EmWidth_dim{\dim_eval:n{1em}}
	\group_end:
}

\cs_set:Npn\_typoAid_log:n#1#2{%
	\msg_log:n{%
	\l__typoAid_typeout_string~#2 \iow_newline:.~#1
	}
}

\cs_set_nopar:Nn\_typoAid_Alphabet_string:{Alphabet~length:~\dim_use:N\l__typoAid_Alphabet_dim}

\cs_set_nopar:Nn\_typoAid_ExHeight_string:{%
	Ex~height:~\dim_use:N\l__typoAid_ExHeight_dim
}

\cs_set_nopar:Npn\_typoAid_EmWidth_string:{%
	Em~width:~\dim_use:N\l__typoAid_EmWidth_dim
}

\ProvideDocumentCommand{\typrintalph}{ s m }%
	{%
	\_typoAid_incrCntr:n{#2}
	\IfBooleanTF{#1}{%
		\msg_term:n{\l__typoAid_typeout_string#2\iow_newline:*~\_typoAid_Alphabet_string:}%
	}{%
		 \_typoAid_Alphabet_string:%
	}%
	\_typoAid_log:n{\_typoAid_Alphabet_string:}{ #2}
}

\ProvideDocumentCommand{\typrintex}{ s m }{%
	\_typoAid_calcEx:n{#2}
	\IfBooleanTF{#1}{%
		\msg_term:n{\l__typoAid_typeout_string#2 \iow_newline:*~ \_typoAid_ExHeight_string:}%
	}{%
		 \_typoAid_ExHeight_string:%
	}%
	\_typoAid_log:n{\_typoAid_ExHeight_string:}{ #2}
}

\ProvideDocumentCommand{\typrintem}{s m}{%
	\_typoAid_calcEm:n{#2}
	\IfBooleanTF{#1}{%
		\msg_term:n{\l__typoAid_typeout_string #2 \iow_newline:*~ \_typoAid_EmWidth_string:}%
	}{%
		\_typoAid_EmWidth_string:
	}%
	\_typoAid_log:n{\_typoAid_EmWidth_string:}{ #2}
}

\ProvideDocumentCommand{\typrintall}{ s m}{%
\IfBooleanTF{#1}{%
	\typrintalph*{#2}\\
	\typrintex*{#2}\\
	\typrintem*{#2}\\
	}{%
	\typrintalph{#2}\\
	\typrintex{#2}\\
	\typrintem{#2}\\
	}
}


%%\ExplSyntaxOff