%%
%% This is file `luasseq.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% luasseq.dtx  (with options: `package')
%% 
%% IMPORTANT NOTICE:
%% 
%% For the copyright see the source file.
%% 
%% Any modified versions of this file must be renamed
%% with new filenames distinct from luasseq.sty.
%% 
%% For distribution of the original source see the terms
%% for copying and modification in the file luasseq.dtx.
%% 
%% This generated file may be distributed as long as the
%% original source files, as listed above, are part of the
%% same distribution. (The sources need not necessarily be
%% in the same archive or directory.)

\NeedsTeXFormat{LaTeX2e}

\ProvidesPackage{luasseq}[2023/01/10]

\RequirePackage{ifthen,calc,pifont}
\RequirePackage{pgf}[2006/01/01]
\RequirePackage{xkeyval}
\usepgflibrary{snakes}

\newboolean{debug}
\setboolean{debug}{false}

\DeclareOption{ps}{\errmessage{sseq: ps/nops is deprecated}}
\DeclareOption{nops}{\errmessage{sseq: ps/nops is deprecated}}
\DeclareOption{dvips}{\errmessage{sseq: deprecated option dvips ignored}}
\DeclareOption{xdvi}{\errmessage{sseq: deprecated option xdvi ignored}}
\DeclareOption{color}{\errmessage{sseq: deprecated option color ignored}}
\DeclareOption{nocolor}{\errmessage{sseq: deprecated option nocolor ignored}}
\DeclareOption{debug}{\setboolean{debug}{true}}

\ProcessOptions


\directlua0{dofile(kpse.find_file("luasseq.lua","lua"))}

 \definecolor{sseqgr}{gray}{0.65}
 \definecolor{sslightgr}{gray}{0.9}
 \definecolor{ssred}{rgb}{1,0,0}
 \definecolor{ssblack}{rgb}{0,0,0}
\newcommand{\ssconncolor}{ssblack}
\newcommand{\sslabelcolor}{ssblack}
\newcommand{\ssplacecolor}{ssblack}

%% ^^A Initialization
\newcount\sseqxstart \sseqxstart=0
\newcount\sseqystart \sseqystart=0
\newdimen\sseq@dimen % ^^A To convert dimensions to scaled points (in TeX)
\newbox\sseqbox % ^^A To compute the size of dropped objects (in TeX)

\long\def\for #1=#2\to#3\do#4\od{#1=#2 \sseq@for #1\to #3\do #4\od}
\long\def\sseq@for #1\to #2\do #3\od{%
 \ifnum #1>#2 \else
   #3\relax
  \advance #1 by 1
   \def\tempcmd{\sseq@for #1\to #2\do #3\od}%
   \expandafter\tempcmd
 \fi
}

\def\@eval#1#2{%
  \edef\tempcmd{\noexpand#1#2}%
  \tempcmd
}

\def\ss@placespecial#1#2#3#4#5{
\directlua0{sseq_drop_object(#1,#2,[[#3]],[[#4]],[[#5]],[[\ssplacecolor]])}}

\newcommand{\ssplace}[3]{
 \ss@placespecial{#1}{#2}{rectangle}{discard}{#3}
}

\newcommand{\ssplaceboxed}[3]{
 \ss@placespecial{#1}{#2}{rectangle}{stroke}{\ensuremath{#3}}
}

\newcommand{\ssplacecircled}[3]{
   \ss@placespecial{#1}{#2}{circle}{stroke}{\ensuremath{#3}}
}

\newcommand{\ssmoveto}[2]{\directlua0{sseq_moveto(#1,#2)}}
\newcommand{\ssmove}[2]{\directlua0{sseq_move(#1,#2)}}
\define@key{sseqdrop}{circled}[true]{\newif\ifKV@sseqdrop@circled\csname KV@sseqdrop@circled#1\endcsname}
\define@key{sseqdrop}{boxed}[true]{\newif\ifKV@sseqdrop@boxed\csname KV@sseqdrop@boxed#1\endcsname}
\define@key{sseqdrop}{color}{\def\sseq@color{#1}}
\define@key{sseqdrop}{name}{\def\sseq@name{#1}}
\def\ssdrop{\@ifnextchar[\sseq@drop{\sseq@drop[]}}
\def\sseq@drop[#1]#2{
 \presetkeys{sseqdrop}{circled=false,boxed=false,color=\ssplacecolor,name=\relax}{}
 \setkeys{sseqdrop}{#1}
 \ifKV@sseqdrop@circled
   \directlua0{sseq_drop_object_here("circle","stroke",[[#2]],"\sseq@color")}
 \else
   \ifKV@sseqdrop@boxed
     \directlua0{sseq_drop_object_here("rectangle","stroke",[[#2]],"\sseq@color")}
   \else
     \directlua0{sseq_drop_object_here("rectangle","discard",[[#2]],"\sseq@color")}
   \fi
 \fi
 \def\temp{\relax}
 \ifx\sseq@name\temp \else
   \@eval\ssname{{\sseq@name}}
 \fi
}
\newcommand{\ssdropbull}{\ssdrop{\bullet}}
\newcommand{\ssdropboxed}[1]{\ssdrop[boxed]{#1}}
\newcommand{\ssdropcircled}[1]{\ssdrop[circled]{#1}}
\def\ssname#1{\directlua0{sseq_name("#1")}}
\newcommand{\ssgoto}[1]{\directlua0{sseq_goto("#1")}}
\newcommand{\ssprefix}[1]{\directlua0{sseq_prefix("#1")}}
\newcommand{\ssbeginprefixcontext}{\directlua0{sseq_begin_prefix_context()}}
\newcommand{\ssendprefixcontext}{\directlua0{sseq_end_prefix_context()}}
\newcommand{\ssresetprefix}{\directlua0{sseq_reset_prefix()}}
\newcommand{\ssabsgoto}[1]{\directlua0{sseq_abs_goto("#1")}}
\define@key{sseqlabel}{color}{\def\sseq@color{#1}}
\define@key{sseqlabel}{pos}{\def\sseq@position{#1}}
\define@key{sseqlabel}{U}[]{\def\sseq@position{U}}
\define@key{sseqlabel}{LU}[]{\def\sseq@position{LU}}
\define@key{sseqlabel}{L}[]{\def\sseq@position{L}}
\define@key{sseqlabel}{LD}[]{\def\sseq@position{LD}}
\define@key{sseqlabel}{D}[]{\def\sseq@position{D}}
\define@key{sseqlabel}{RD}[]{\def\sseq@position{RD}}
\define@key{sseqlabel}{R}[]{\def\sseq@position{R}}
\define@key{sseqlabel}{RU}[]{\def\sseq@position{RU}}
\def\ssdroplabel{\@ifnextchar[\sseq@droplabel{\sseq@droplabel[]}}
\def\sseq@droplabel[#1]#2{
 \def\sseq@position{L}
 \presetkeys{sseqlabel}{color=\ssplacecolor}{}
 \setkeys{sseqlabel}{#1}
 \directlua0{sseq_drop_label("\sseq@position","\sseq@color",[[#2]])}
}
\define@key{sseqdropext}{circled}[true]{\newif\ifKV@sseqdrop@circled\csname KV@sseqdrop@circled#1\endcsname}
\define@key{sseqdropext}{boxed}[true]{\newif\ifKV@sseqdrop@boxed\csname KV@sseqdrop@boxed#1\endcsname}
\define@key{sseqdropext}{color}{\def\ssplacecolor{#1}}
\define@key{sseqdropext}{name}{\def\sseq@name{#1}}
\def\ssdropextension{\@ifnextchar[\sseq@dropextension{\sseq@dropextension[]}}
\def\sseq@dropextension[#1]{
 \edef\sseq@savecolor{\ssplacecolor}
 \def\sseq@name{\relax}
 \presetkeys{sseqdropext}{circled=false,boxed=false}{}
 \setkeys{sseqdrop}{#1}
  \ifKV@sseqdrop@boxed
   \directlua0{sseq_drop_extension("rectangle","stroke","\sseq@color")}
 \else
   \directlua0{sseq_drop_extension("circle","stroke","\sseq@color")}
 \fi

 \def\temp{\relax}
 \ifx\sseq@name\temp \else
   \@eval\ssname{{\sseq@name}}
 \fi
}
\define@key{sseqstroke}{color}{\def\sseq@color{#1}}
\define@key{sseqstroke}{curve}{\def\sseq@curve{#1}}
\define@key{sseqstroke}{dashed}[{{2pt}{2pt}}]{\def\sseq@dashing{#1}}
\define@key{sseqstroke}{dotted}[{{.5pt}{2pt}}]{\def\sseq@dashing{#1}}
\define@key{sseqstroke}{arrowfrom}[\sseq@defaultarrowstyle]{\def\sseq@arrowfrom{\ssinversearrowhead[#1]}}
\define@key{sseqstroke}{arrowto}[\sseq@defaultarrowstyle]{\def\sseq@arrowto{\ssarrowhead[#1]}}
\define@key{sseqstroke}{void}[true]{\newif\ifKV@sseqstroke@void\csname KV@sseqstroke@void#1\endcsname}
\def\ssstroke{\@ifnextchar[\sseq@stroke{\sseq@stroke[]}}
\def\sseq@stroke[#1]{
 \def\sseq@dashing{}
 \def\sseq@curve{}
 \def\sseq@arrowfrom{}
 \def\sseq@arrowto{}
 \presetkeys{sseqstroke}{void=false,color=\ssconncolor}{}
 \setkeys{sseqstroke}{#1}
 \ifKV@sseqstroke@void % ^^A a void line
   \directlua0{sseq_late_connection("\sseq@dashing","\sseq@curve","\sseq@color",false,true)}
 \else
   \directlua0{sseq_late_connection("\sseq@dashing","\sseq@curve","\sseq@color",false,false)}
 \fi
  \sseq@arrowfrom
  \sseq@arrowto
}
\newcommand{\sscurve}[1]{\sseq@stroke[curve=#1]}
\newcommand{\ssdashedstroke}{\sseq@stroke[dashed]}
\newcommand{\ssdashedcurve}[1]{\sseq@stroke[dashed,curve=#1]}
\newcommand{\ssdottedstroke}{\sseq@stroke[dotted]}
\newcommand{\ssdottedcurve}[1]{\sseq@stroke[dotted,curve=#1}
\newcommand{\ssarrowhead}[1][\sseq@defaultarrowstyle]{\directlua0{sseq_add_arrow("arrowto","#1")}}
\newcommand{\ssinversearrowhead}[1][\sseq@defaultarrowstyle]{\directlua0{sseq_add_arrow("arrowfrom","#1")}}
\define@key{sseqline}{color}{\def\sseq@color{#1}}
\define@key{sseqline}{curve}{\def\sseq@curve{#1}}
\define@key{sseqline}{dashed}[{{2pt}{2pt}}]{\def\sseq@dashing{#1}}
\define@key{sseqline}{dotted}[{{.5pt}{2pt}}]{\def\sseq@dashing{#1}}
\define@key{sseqline}{arrowfrom}[\sseq@defaultarrowstyle]{\def\sseq@arrowfrom{\ssinversearrowhead[#1]}}
\define@key{sseqline}{arrowto}[\sseq@defaultarrowstyle]{\def\sseq@arrowto{\ssarrowhead[#1]}}
\define@key{sseqline}{void}[true]{\newif\ifKV@sseqline@void\csname KV@sseqline@void#1\endcsname}
\def\ssline{\@ifnextchar[\sseq@line{\sseq@line[]}}
\def\sseq@line[#1]#2#3{
 \def\sseq@dashing{}
 \def\sseq@curve{}
 \edef\sseq@arrowfrom{}
 \edef\sseq@arrowto{}
 \presetkeys{sseqline}{void=false,color=\ssconncolor}{}
 \setkeys{sseqline}{#1}
 \ifKV@sseqline@void % ^^A a void line
   \directlua0{sseq_assert_source(); sseq_finish_pos(); sseq_move(#2,#3); sseq_late_connection("\sseq@dashing","\sseq@curve","\sseq@color",false,true)}
 \else
   \directlua0{sseq_open_connection("\sseq@dashing","\sseq@curve","\sseq@color",false,false); sseqposx = sseqposx+#2; sseqposy = sseqposy+#3}
 \fi
 \sseq@arrowfrom
 \sseq@arrowto
}
\newcommand{\sscurvedline}[3]{\ssline[curve=#3]{#1}{#2}}
\newcommand{\ssdashedline}[2]{\ssline[dashed]{#1}{#2}}
\newcommand{\sscurveddashedline}[3]{\ssline[curve=#3,dashed]{#1}{#2}}
\newcommand{\ssarrow}[3][]{
  \ssline[arrowto,#1]{#2}{#3}
}
\newcommand{\sscurvedarrow}[3]{\ssline[arrowto,curve=#3]{#1}{#2}}
\newcommand{\ssdashedarrow}[2]{\ssline[arrowto,dashed]{#1}{#2}}
\newcommand{\sscurveddashedarrow}[3]{\ssline[arrowto,dashed,curve=#3]{#1}{#2}}
\def\ssvoidline{\@ifnextchar[\sseq@voidline{\sseq@voidline[]}}
\def\sseq@voidline[#1]#2#3{
 \def\sseq@dashing{}
 \def\sseq@curve{}
 \edef\sseq@arrowfrom{}
 \edef\sseq@arrowto{}
 \presetkeys{sseqline}{color=\ssconncolor}{}
 \setkeys{sseqline}{#1}
  \directlua0{sseq_void_line("\sseq@dashing","\sseq@curve","\sseq@color",#2,#3)}
 \sseq@arrowfrom
 \sseq@arrowto
}

\newcommand{\ssvoidarrow}[2]{\ssvoidline{#1}{#2}\ssarrowhead}
\newcommand{\ssinversevoidarrow}[2]{\ssvoidline{#1}{#2}\ssinversearrowhead}

\newcommand{\ssbullstring}[3]{
\directlua0{sseq_bullstring(#1,#2,#3,[[\ssplacecolor]])}
}
\newcommand{\ssinfbullstring}[3]{
\ssbullstring{#1}{#2}{#3}
\ssvoidarrow{#1}{#2}
}
\newcommand{\ssgrayout}[1][gray]{\directlua0{sseq_grayout("#1")}}
\define@key{sseq}{grid}{
  \directlua0{sseqgriddrawer = sseq_grid_#1}
}
\define@key{sseq}{entrysize}{
  \sseq@dimen=#1
  \directlua0{sseqentrysize=\number\sseq@dimen} % In LUA, it's all in scaled points.
}

\define@key{sseq}{labels}{
  \setkeys{sseq}{xlabels=#1,ylabels=#1}
}
\define@key{sseq}{xlabels}{
  \def\temp{#1}
  \def\temptwo{none}
  \ifx\temp\temptwo
    \directlua0{sseqxlabels = sseq_parse_label_list("")}
  \else
    \def\temptwo{numbers}
    \ifx\temp\temptwo
      \directlua0{sseqxlabels = sseq_parse_label_list("&n")}
    \else
      \directlua0{sseqxlabels = sseq_parse_label_list([[#1]])}
    \fi
  \fi
}
\define@key{sseq}{ylabels}{
  \def\temp{#1}
  \def\temptwo{none}
  \ifx\temp\temptwo
    \directlua0{sseqylabels = sseq_parse_label_list("")}
  \else
    \def\temptwo{numbers}
    \ifx\temp\temptwo
      \directlua0{sseqylabels = sseq_parse_label_list("&n")}
     \else
       \directlua0{sseqylabels = sseq_parse_label_list([[#1]])}
      \fi
  \fi
}

\define@key{sseq}{xlabelstep}{
\directlua0{sseqxstep=#1}
}
\define@key{sseq}{ylabelstep}{
\directlua0{sseqystep=#1}
}

\define@key{sseq}{labelstep}{\setkeys{sseq}{xlabelstep=#1}\setkeys{sseq}{ylabelstep=#1}}

\define@key{sseq}{gapsize}{\setkeys{sseq}{xgapsize=#1}\setkeys{sseq}{ygapsize=#1}}
\define@key{sseq}{xgapsize}{
\sseq@dimen=#1
\directlua0{sseqxgap=\number\sseq@dimen}
}
\define@key{sseq}{ygapsize}{
\sseq@dimen=#1
\directlua0{sseqygap=\number\sseq@dimen}
}
\define@key{sseq}{leak}{\setkeys{sseq}{xleak=#1}\setkeys{sseq}{yleak=#1}}
\define@key{sseq}{xleak}{
\sseq@dimen=#1
\directlua0{sseqxleak=\number\sseq@dimen}
}
\define@key{sseq}{yleak}{
\sseq@dimen=#1
\directlua0{sseqyleak=\number\sseq@dimen}
}

\define@key{sseq}{gridstroke}{
\sseq@dimen=#1
\directlua0{sseqgridstrokethickness=\number\sseq@dimen}
}

\define@key{sseq}{arrows}{
\def\sseq@defaultarrowstyle{#1}
\directlua0{sseqdefaultarrowstyle="#1"}
}

\define@key{sseq}{packing}{
\directlua0{sseqpacking = sseq_pack_#1}
}
\def\sseq@defaultarrowstyle{to}

\directlua0{sseq_set_defaults()}

\newenvironment{sseq}[3][]{%
\begingroup
\directlua0{sseq_init()}
\begin{pgfpicture}
\setkeys{sseq}{#1}
\directlua0{sseq_setup_ranges("#2","#3",\the\sseqxstart,\the\sseqystart)}
\directlua0{sseq_drawgrid()}
\directlua0{sseq_drawlabels()}
\directlua0{sseqboxno = \the\sseqbox} % ^^A Needed to measure the size of entries
}
{
\relax
\ssmoveto 0 0
\directlua0{sseq_position_objects(); sseq_dump_code()}
\end{pgfpicture}
\endgroup
}
\endinput
%%
%% End of file `luasseq.sty'.