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% \iffalse meta-comment
%
%% File: rule-D.dtx Copyright (C) 2017-2021 Markus Kohm
%%
%% It may be distributed and/or modified under the conditions of the
%% LaTeX Project Public License (LPPL), either version 1.3c of this
%% license or (at your option) any later version. The latest version
%% of this license is in the file
%%
%% http://www.latex-project.org/lppl.txt
%%
%% This file is part of the "GS1 bundle" (The Work in LPPL)
%% and all files in that bundle must be distributed together.
%%
%% The released version of this bundle is available from CTAN.
%%
%% -------------------------------------------------------------------------
%
%<*driver|package>
\RequirePackage{expl3}[2019/01/17]
\GetIdInfo$Id: rule-D.dtx 23 2021-06-17 07:00:36Z mjk $
{rule functions for LaTeX3}
%</driver|package>
%<*driver>
\documentclass{l3doc}
\begin{document}
\DocInput{\jobname.dtx}
\end{document}
%</driver>
% \fi
%
% \title{^^A
% The \pkg{rule-D} Package\\
% Rule Functions\thanks
% {^^A
% This file describes v\ExplFileVersion,
% last revised \ExplFileDate.^^A
% }^^A
% }
%
% \author{^^A
% Markus Kohm\thanks
% {^^A
% E-mail: \href{mailto:komascript@gmx.info}{komascript@gmx.info}^^A
% }^^A
% }
%
% \date{Released \ExplFileDate}
%
% \maketitle
%
% \begin{documentation}
% At \LaTeXe{} you have command \cmd{\rule} to make horizontal and vertical
% rules and even boxes. Currently there's no L3 command for this. This
% module provides two new L3 functions for rules. The ``-D'' in the module
% name indicates, that currently the implementation uses deprecated
% functions like \cmd{\tex_vrule:D}. Nevertheless, the new rule functions
% aren't declared to be deprecated.
%
% This package has been made only, because \pkg{GS1} needs such rule
% functions. So maybe it's simply a helper package for \pkg{GS1}.
%
%
% \begin{function}{\rule:nn , \rule:nnn}
% \begin{syntax}
% "\rule:nnn" \Arg{dimexpr_{raise}} \Arg{dimexpr_{width}}^^A
% \Arg{dimexpr_{height}}
% "\rule:nn" \Arg{dimexpr_{width}} \Arg{dimexpr_{height}}
% \end{syntax}
% Draw a rule of width \meta{dimexpr_{width}}, height
% \meta{dimexpr_{height}} and raise it by \meta{dimexpr_{raise}}. It the
% \meta{dimex_{raise}} has not been given, the rule will be drawn at the
% base line.
% \end{function}
%
% \end{documentation}
%
% \begin{implementation}
%
% \section{\pkg{rule-D} implementation}
% \label{sec:rule-D:implementation}
%
% \begin{macrocode}
%<*package>
%<@@=rule>
% \end{macrocode}
%
% First of all we have to setup package information:
% \begin{macrocode}
\ProvidesExplPackage
{rule-D} {\ExplFileDate} {\ExplFileVersion}
{experimental~L3~rule~functions}
% \end{macrocode}
%
% \begin{macro}[updated = 2021-06-17]{\rule:nn , \rule:nnn}
% \begin{macrocode}
\cs_new:Npn \rule:nn #1#2
{
\rule:nnn { \c_zero_dim } { #1 } { #2 }
}
\cs_new:Npn \rule:nnn #1#2#3
{
% \end{macrocode}
% \changes{v23}{2021/06/17}{deprecated \cs{hbox_unpack_clear} replaced by
% \cs{hbox_unpack_drop}}
% Following line is same like \cs{leavevmode}, but it's \LaTeX3 instead of
% plain\TeX.
% \begin{macrocode}
\hbox_unpack_drop:N \c_empty_box
\hbox:n
{
\tex_vrule:D width \dim_eval:n { #2 }
height \dim_eval:n { #1 + #3 }
depth -\dim_eval:n { #1 }
}
}
% \end{macrocode}
% \end{macro}
%
% \begin{macrocode}
%</package>
% \end{macrocode}
%
% \end{implementation}
%
% \PrintIndex
%
\endinput
%
% end of file
% \endinput
% Local Variables:
% mode: doctex
% TeX-master: t
% End:
|
