%
% ***************** THE DASHRULEX PACKAGE *****************
%
% Copyright (C) 2024 by Qu Yi <toquyi@163.com>
%
% This work may be distributed and/or modified under the
% conditions of the CC-BY 4.0 License.
% The latest version of this license is in
%   https://creativecommons.org/licenses/by/4.0/legalcode
\NeedsTeXFormat{LaTeX2e}[2012/02/12]
\RequirePackage{xparse}
\ProvidesExplPackage{dashrulex}{2024/03/25}{1.00c}
  {Draw dashed rules}
\DeclareDocumentCommand{\hdashrule}{O{0pt}O{x}mmm}
  {
    \tl_if_blank:nTF {#5}
      { \rule[#1]{#3}{#4} }
      {
        \mbox{}
        \use:c { #2leaders }
        \hbox:n
          {
            \clist_map_inline:nn {#5}
              { \drx@parse@dash{#1}{#4}{##1} }
          }
        \skip_horizontal:n {#3}
        \mbox{}
      }
  }
\NewDocumentCommand{\drx@parse@dash}
  {mm>{\SplitArgument{1}{|}}m}
  {\drx@parse@dash@inner{#1}{#2}#3}
\cs_set_protected:Npn \drx@parse@dash@inner #1#2#3#4
  {
    \IfNoValueTF{#4}
      {\vrulemod[#1]{#3}{#2}\skip_horizontal:n {#3}}
      {\vrulemod[#1]{#3}{#2}\skip_horizontal:n {#4}}
  }
\NewDocumentCommand{\hanyrule}{O{x}mm}
  {
    \mbox{}
    \use:c { #1leaders }
    \hbox:n { \clist_map_inline:nn {#3} {##1} }
    \skip_horizontal:n {#2}
    \mbox{}
  }

\int_new:N \l__drx_vrule_counter_int
\int_set:Nn \l__drx_vrule_counter_int { 1 }
\dim_new:N \l__drx_vrule_height_dim
\tl_new:N \l__drx_tmpa_tl
\cs_new_protected:Npn \drx@step@counter@height #1
  {
    \int_incr:N \l__drx_vrule_counter_int
    \dim_add:Nn \l__drx_vrule_height_dim {#1}
  }
\NewDocumentCommand{\vrulemod}{O{0pt}oomm}
  {
    \group_begin:
    \IfValueT{#2}
      {
        \tl_set:Nn \l__drx_tmpa_tl { [#2] }
        \IfValueT{#3}{\tl_put_right:Nn \l__drx_tmpa_tl { [#3] }}
      }
    \exp_last_unbraced:Nnf
    \raisebox{#1}{\l__drx_tmpa_tl}
      {
        \clist_map_inline:nn {#5}
          {
            \int_compare:nNnTF { \l__drx_vrule_counter_int } > { 1 }
              {
                \int_if_even:nTF { \l__drx_vrule_counter_int }
                  { \drx@step@counter@height{##1} }
                  {
                    \kern -#4
                    \exp_args:NV
                    \raisebox\l__drx_vrule_height_dim{\rule{#4}{##1}}
                    \drx@step@counter@height{##1}
                  }
              }
              {
                \rule{#4}{##1}
                \drx@step@counter@height{##1}
              }
          }
      }
    \group_end:
  }
\endinput
%
% End of file `dashrulex.sty'.