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% rail.sty - style file to support railroad diagrams
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%
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% 09-Jul-90 L. Rooijakkers
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% 08-Oct-90 L. Rooijakkers fixed centering bug when \rail@tmpc<0.
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% 07-Feb-91 L. Rooijakkers added \railoptions command, indexing
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% 08-Feb-91 L. Rooijakkers minor fixes
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% 28-Jun-94 K. Barthelmann turned into LaTeX2e package
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% 08-Dec-96 K. Barthelmann replaced \@writefile
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% 13-Dec-96 K. Barthelmann cleanup
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%
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% This style file needs to be used in conjunction with the 'rail'
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% program. Running LaTeX as 'latex file' produces file.rai, which should be
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% processed by Rail with 'rail file'. This produces file.rao, which will
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% be picked up by LaTeX on the next 'latex file' run.
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%
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% LaTeX will warn if there is no file.rao or it's out of date.
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%
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% The macros in this file thus consist of two parts: those that read and
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% write the .rai and .rao files, and those that do the actual formatting
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% of the railroad diagrams.
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\NeedsTeXFormat{LaTeX2e}
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\ProvidesPackage{rail}[1996/12/13]
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% railroad diagram formatting parameters (user level)
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% all of these are copied into their internal versions by \railinit
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%
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% \railunit : \unitlength within railroad diagrams
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% \railextra : extra length at outside of diagram
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% \railboxheight : height of ovals and frames
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% \railboxskip : vertical space between lines
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% \railboxleft : space to the left of a box
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% \railboxright : space to the right of a box
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% \railovalspace : extra space around contents of oval
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% \railframespace : extra space around contents of frame
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% \railtextleft : space to the left of text
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% \railtextright : space to the right of text
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% \railtextup : space to lift text up
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% \railjoinsize : circle size of join/split arcs
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% \railjoinadjust : space to adjust join
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%
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% \railnamesep : separator between name and rule body
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\newlength\railunit
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\newlength\railextra
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\newlength\railboxheight
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\newlength\railboxskip
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\newlength\railboxleft
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\newlength\railboxright
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\newlength\railovalspace
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\newlength\railframespace
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\newlength\railtextleft
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\newlength\railtextright
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\newlength\railtextup
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\newlength\railjoinsize
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\newlength\railjoinadjust
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\newlength\railnamesep
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% initialize the parameters
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\setlength\railunit{1sp}
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\setlength\railextra{4ex}
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\setlength\railboxleft{1ex}
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\setlength\railboxright{1ex}
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\setlength\railovalspace{2ex}
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\setlength\railframespace{2ex}
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\setlength\railtextleft{1ex}
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\setlength\railtextright{1ex}
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\setlength\railjoinadjust{0pt}
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\setlength\railnamesep{1ex}
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\DeclareOption{10pt}{
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\setlength\railboxheight{16pt}
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\setlength\railboxskip{24pt}
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\setlength\railtextup{5pt}
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\setlength\railjoinsize{16pt}
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}
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\DeclareOption{11pt}{
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\setlength\railboxheight{16pt}
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\setlength\railboxskip{24pt}
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\setlength\railtextup{5pt}
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\setlength\railjoinsize{16pt}
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}
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\DeclareOption{12pt}{
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\setlength\railboxheight{20pt}
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\setlength\railboxskip{28pt}
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\setlength\railtextup{6pt}
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\setlength\railjoinsize{20pt}
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}
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\ExecuteOptions{10pt}
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\ProcessOptions
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% internal versions of the formatting parameters
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%
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% \rail@extra : \railextra
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% \rail@boxht : \railboxheight
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% \rail@boxsp : \railboxskip
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% \rail@boxlf : \railboxleft
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% \rail@boxrt : \railboxright
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% \rail@boxhht : \railboxheight / 2
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% \rail@ovalsp : \railovalspace
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% \rail@framesp : \railframespace
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% \rail@textlf : \railtextleft
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% \rail@textrt : \railtextright
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% \rail@textup : \railtextup
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% \rail@joinsz : \railjoinsize
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% \rail@joinhsz : \railjoinsize / 2
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% \rail@joinadj : \railjoinadjust
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%
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% \railinit : internalize all of the parameters.
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\newcount\rail@extra
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\newcount\rail@boxht
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\newcount\rail@boxsp
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\newcount\rail@boxlf
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\newcount\rail@boxrt
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\newcount\rail@boxhht
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\newcount\rail@ovalsp
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\newcount\rail@framesp
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\newcount\rail@textlf
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\newcount\rail@textrt
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\newcount\rail@textup
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\newcount\rail@joinsz
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\newcount\rail@joinhsz
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\newcount\rail@joinadj
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\newcommand\railinit{
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\rail@extra=\railextra
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\divide\rail@extra by \railunit
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\rail@boxht=\railboxheight
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\divide\rail@boxht by \railunit
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\rail@boxsp=\railboxskip
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\divide\rail@boxsp by \railunit
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\rail@boxlf=\railboxleft
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\divide\rail@boxlf by \railunit
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\rail@boxrt=\railboxright
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\divide\rail@boxrt by \railunit
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\rail@boxhht=\railboxheight
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\divide\rail@boxhht by \railunit
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\divide\rail@boxhht by 2
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\rail@ovalsp=\railovalspace
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\divide\rail@ovalsp by \railunit
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\rail@framesp=\railframespace
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\divide\rail@framesp by \railunit
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\rail@textlf=\railtextleft
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\divide\rail@textlf by \railunit
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\rail@textrt=\railtextright
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\divide\rail@textrt by \railunit
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\rail@textup=\railtextup
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\divide\rail@textup by \railunit
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\rail@joinsz=\railjoinsize
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\divide\rail@joinsz by \railunit
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\rail@joinhsz=\railjoinsize
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\divide\rail@joinhsz by \railunit
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\divide\rail@joinhsz by 2
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\rail@joinadj=\railjoinadjust
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\divide\rail@joinadj by \railunit
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}
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\AtBeginDocument{\railinit}
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% \rail@param : declarations for list environment
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%
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% \railparam{TEXT} : sets \rail@param to TEXT
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\def\rail@param{}
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\newcommand\railparam[1]{
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\def\rail@param{#1}
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}
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% \rail@tokenfont : format setup for \railtoken identifiers
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%
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% \rail@termfont : format setup for terminals
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%
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% \rail@nontfont : format setup for nonterminals
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%
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% \rail@annofont : format setup for annotations
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%
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% \rail@rulefont : format setup for rule names
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%
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% \rail@indexfont : format setup for index entry
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%
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% \railtermfont{TEXT} : set terminal format setup to TEXT
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%
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% \railnontermfont{TEXT} : set nonterminal format setup to TEXT
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%
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% \railannotatefont{TEXT} : set annotation format setup to TEXT
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%
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% \railnamefont{TEXT} : set rule name format setup to TEXT
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%
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% \railindexfont{TEXT} : set index entry format setup to TEXT
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\def\rail@termfont{\ttfamily\upshape}
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\def\rail@nontfont{\rmfamily\upshape}
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\def\rail@annofont{\rmfamily\itshape}
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\def\rail@namefont{\rmfamily\itshape}
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\def\rail@indexfont{\rmfamily\itshape}
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\newcommand\railtermfont[1]{
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\def\rail@termfont{#1}
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}
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\newcommand\railnontermfont[1]{
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\def\rail@nontfont{#1}
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}
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\newcommand\railannotatefont[1]{
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\def\rail@annofont{#1}
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}
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\newcommand\railnamefont[1]{
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\def\rail@namefont{#1}
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}
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\newcommand\railindexfont[1]{
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\def\rail@indexfont{#1}
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}
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% railroad read/write macros
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%
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% \begin{rail} TEXT \end{rail} : TEXT is written out to the .rai file,
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% as \rail@i{NR}{TEXT}. Then the matching
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% \rail@o{NR}{FMT} from the .rao file is
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% executed (if defined).
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%
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% \railoptions{OPTIONS} : OPTIONS are written out to the .rai file,
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% as \rail@p{OPTIONS}.
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%
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% \railterm{IDENT,IDENT,...} : format IDENT as terminals. writes out
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% \rail@t{IDENT} to the .rai file
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%
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% \railalias{IDENT}{TEXT} : format IDENT as TEXT. defines \rail@t@IDENT as
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% TEXT.
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%
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% \rail@nr : railroad diagram counter
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%
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% \ifrail@match : current \rail@i{NR}{TEXT} matches
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%
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% \rail@first : actions to be done first. read in .rao file,
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% open .rai file if \@filesw true, undefine \rail@first.
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% executed from \begin{rail} and \railtoken.
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%
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% \rail@i{NR}{TEXT} : defines \rail@i@NR as TEXT. written to the .rai
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% file by \rail, read from the .rao file by
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% \rail@first
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%
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% \rail@t{IDENT} : tells Rail that IDENT is to be custom formatted,
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% written to the .rai file by \railterm.
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%
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% \rail@o{NR}{TEXT} : defines \rail@o@NR as TEXT, read from the .rao
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% file by \rail@first.
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%
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% \rail@p{OPTIONS} : pass options to rail, written to the .rai file by
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% \railoptions
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%
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% \rail@write{TEXT} : write TEXT to the .rai file
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%
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% \rail@warn : warn user for mismatching diagrams
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%
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% \rail@endwarn : either \relax or \rail@warn
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%
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% \ifrail@all : checked at the end of the document
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\newcount\rail@nr
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\newif\ifrail@all
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\rail@alltrue
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\newif\ifrail@match
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\def\rail@first{
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\makeatletter
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\InputIfFileExists{\jobname.rao}{}{\PackageInfo{rail}{No file \jobname.rao}}
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\makeatother
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\if@filesw
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\newwrite\tf@rai
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\immediate\openout\tf@rai=\jobname.rai
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\fi
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\global\let\rail@first=\relax
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}
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\long\def\rail@body#1\end{
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\begingroup
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\let\\=\relax
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\xdef\rail@i@{#1}
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\rail@write{\string\rail@i{\number\rail@nr}{\rail@i@}}
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\endgroup
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\end
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}
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\newenvironment{rail}{
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\global\advance\rail@nr by 1
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\rail@first
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\rail@body
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}{
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\rail@matchtrue
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\@ifundefined{rail@o@\number\rail@nr}{\rail@matchfalse}{}
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\expandafter\ifx\csname rail@i@\number\rail@nr\endcsname\rail@i@
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\else
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\rail@matchfalse
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\fi
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\ifrail@match
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\csname rail@o@\number\rail@nr\endcsname
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\else
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\PackageWarning{rail}{Railroad diagram {\number\rail@nr} doesn't match}
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\global\let\rail@endwarn=\rail@warn
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\begin{list}{}{\rail@param}
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\rail@begin{1}{}
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\rail@setbox{\bfseries ???}
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\rail@oval
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\rail@end
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\end{list}
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\fi
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}
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\newcommand\railoptions[1]{
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\rail@first
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\rail@write{\string\rail@p{#1}}
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}
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\newcommand\railterm[1]{
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\rail@first
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\@for\rail@@:=#1\do{
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\rail@write{\string\rail@t{\rail@@}}
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}
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}
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\newcommand\railalias[2]{
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\expandafter\def\csname rail@t@#1\endcsname{#2}
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}
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\long\def\rail@i#1#2{
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\expandafter\gdef\csname rail@i@#1\endcsname{#2}
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}
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\def\rail@o#1#2{
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\expandafter\gdef\csname rail@o@#1\endcsname{
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\begin{list}{}{\rail@param}#2\end{list}
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}
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}
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\def\rail@t#1{}
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\def\rail@p#1{}
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\def\rail@write#1{\@ifundefined{tf@rai}{}{\immediate\write\tf@rai{#1}}}
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\def\rail@warn{
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\PackageWarningNoLine{rail}{Railroad diagram(s) may have changed.
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Use 'rail' and rerun}
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353 |
}
|
|
|
354 |
|
|
|
355 |
\let\rail@endwarn=\relax
|
|
|
356 |
|
|
|
357 |
\AtEndDocument{\rail@endwarn}
|
|
|
358 |
|
|
|
359 |
% index entry macro
|
|
|
360 |
%
|
|
|
361 |
% \rail@index{IDENT} : add index entry for IDENT
|
|
|
362 |
|
|
|
363 |
\def\rail@index#1{
|
|
|
364 |
\index{\rail@indexfont#1}
|
|
|
365 |
}
|
|
|
366 |
|
|
|
367 |
% railroad formatting primitives
|
|
|
368 |
%
|
|
|
369 |
% \rail@x : current x
|
|
|
370 |
% \rail@y : current y
|
|
|
371 |
% \rail@ex : current end x
|
|
|
372 |
% \rail@sx : starting x for \rail@cr
|
|
|
373 |
% \rail@rx : rightmost previous x for \rail@cr
|
|
|
374 |
%
|
|
|
375 |
% \rail@tmpa : temporary count
|
|
|
376 |
% \rail@tmpb : temporary count
|
|
|
377 |
% \rail@tmpc : temporary count
|
|
|
378 |
%
|
|
|
379 |
% \rail@put : put at (\rail@x,\rail@y)
|
|
|
380 |
%
|
|
|
381 |
% \rail@eline : end line by drawing from \rail@ex to \rail@x
|
|
|
382 |
%
|
|
|
383 |
% \rail@sety{LEVEL} : set \rail@y to level LEVEL
|
|
|
384 |
|
|
|
385 |
\newcount\rail@x
|
|
|
386 |
\newcount\rail@y
|
|
|
387 |
\newcount\rail@ex
|
|
|
388 |
\newcount\rail@sx
|
|
|
389 |
\newcount\rail@rx
|
|
|
390 |
|
|
|
391 |
\newcount\rail@tmpa
|
|
|
392 |
\newcount\rail@tmpb
|
|
|
393 |
\newcount\rail@tmpc
|
|
|
394 |
|
|
|
395 |
\def\rail@put{\put(\number\rail@x,\number\rail@y)}
|
|
|
396 |
|
|
|
397 |
\def\rail@eline{
|
|
|
398 |
\rail@tmpb=\rail@x
|
|
|
399 |
\advance\rail@tmpb by -\rail@ex
|
|
|
400 |
\rail@put{\line(-1,0){\number\rail@tmpb}}
|
|
|
401 |
}
|
|
|
402 |
|
|
|
403 |
\def\rail@sety#1{
|
|
|
404 |
\rail@y=#1
|
|
|
405 |
\multiply\rail@y by -\rail@boxsp
|
|
|
406 |
\advance\rail@y by -\rail@boxht
|
|
|
407 |
}
|
|
|
408 |
|
|
|
409 |
% \rail@begin{HEIGHT}{NAME} : begin a railroad diagram of height HEIGHT
|
|
|
410 |
%
|
|
|
411 |
% \rail@end : end a railroad diagram
|
|
|
412 |
%
|
|
|
413 |
% \rail@expand{IDENT} : expand IDENT
|
|
|
414 |
|
|
|
415 |
\def\rail@begin#1#2{
|
|
|
416 |
\item[]
|
|
|
417 |
\begin{minipage}[t]{\linewidth}
|
|
|
418 |
\ifx\@empty#2\else
|
|
|
419 |
{\rail@namefont \rail@expand{#2}}\\*[\railnamesep]
|
|
|
420 |
\fi
|
|
|
421 |
\unitlength=\railunit
|
|
|
422 |
\rail@tmpa=#1
|
|
|
423 |
\multiply\rail@tmpa by \rail@boxsp
|
|
|
424 |
\begin{picture}(0,\number\rail@tmpa)(0,-\number\rail@tmpa)
|
|
|
425 |
\rail@ex=0
|
|
|
426 |
\rail@rx=0
|
|
|
427 |
\rail@x=\rail@extra
|
|
|
428 |
\rail@sx=\rail@x
|
|
|
429 |
\rail@sety{0}
|
|
|
430 |
}
|
|
|
431 |
|
|
|
432 |
\def\rail@end{
|
|
|
433 |
\advance\rail@x by \rail@extra
|
|
|
434 |
\rail@eline
|
|
|
435 |
\end{picture}
|
|
|
436 |
\end{minipage}
|
|
|
437 |
}
|
|
|
438 |
|
|
|
439 |
\def\rail@expand#1{\@ifundefined{rail@t@#1}{#1}{\csname rail@t@#1\endcsname}}
|
|
|
440 |
|
|
|
441 |
% \rail@token{TEXT}[ANNOT] : format token TEXT with annotation
|
|
|
442 |
%
|
|
|
443 |
% \rail@ctoken{TEXT}[ANNOT] : format token TEXT centered with annotation
|
|
|
444 |
%
|
|
|
445 |
% \rail@nont{TEXT}[ANNOT] : format nonterminal TEXT with annotation
|
|
|
446 |
%
|
|
|
447 |
% \rail@cnont{TEXT}[ANNOT] : format nonterminal TEXT centered with annotation
|
|
|
448 |
%
|
|
|
449 |
% \rail@term{TEXT}[ANNOT] : format terminal TEXT with annotation
|
|
|
450 |
%
|
|
|
451 |
% \rail@cterm{TEXT}[ANNOT] : format terminal TEXT centered with annotation
|
|
|
452 |
%
|
|
|
453 |
% \rail@annote[TEXT] : format TEXT as annotation
|
|
|
454 |
|
|
|
455 |
\def\rail@token#1[#2]{
|
|
|
456 |
\rail@setbox{%
|
|
|
457 |
{\rail@termfont \rail@expand{#1}}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
|
|
|
458 |
}
|
|
|
459 |
\rail@oval
|
|
|
460 |
}
|
|
|
461 |
|
|
|
462 |
\def\rail@ctoken#1[#2]{
|
|
|
463 |
\rail@setbox{%
|
|
|
464 |
{\rail@termfont \rail@expand{#1}}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
|
|
|
465 |
}
|
|
|
466 |
\rail@coval
|
|
|
467 |
}
|
|
|
468 |
|
|
|
469 |
\def\rail@nont#1[#2]{
|
|
|
470 |
\rail@setbox{%
|
|
|
471 |
{\rail@nontfont \rail@expand{#1}}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
|
|
|
472 |
}
|
|
|
473 |
\rail@frame
|
|
|
474 |
}
|
|
|
475 |
|
|
|
476 |
\def\rail@cnont#1[#2]{
|
|
|
477 |
\rail@setbox{%
|
|
|
478 |
{\rail@nontfont \rail@expand{#1}}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
|
|
|
479 |
}
|
|
|
480 |
\rail@cframe
|
|
|
481 |
}
|
|
|
482 |
|
|
|
483 |
\def\rail@term#1[#2]{
|
|
|
484 |
\rail@setbox{%
|
|
|
485 |
{\rail@termfont #1}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
|
|
|
486 |
}
|
|
|
487 |
\rail@oval
|
|
|
488 |
}
|
|
|
489 |
|
|
|
490 |
\def\rail@cterm#1[#2]{
|
|
|
491 |
\rail@setbox{%
|
|
|
492 |
{\rail@termfont #1}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
|
|
|
493 |
}
|
|
|
494 |
\rail@coval
|
|
|
495 |
}
|
|
|
496 |
|
|
|
497 |
\def\rail@annote[#1]{
|
|
|
498 |
\rail@setbox{\rail@annofont #1}
|
|
|
499 |
\rail@text
|
|
|
500 |
}
|
|
|
501 |
|
|
|
502 |
% \rail@box : temporary box for \rail@oval and \rail@frame
|
|
|
503 |
%
|
|
|
504 |
% \rail@setbox{TEXT} : set \rail@box to TEXT, set \rail@tmpa to width
|
|
|
505 |
%
|
|
|
506 |
% \rail@oval : format \rail@box of width \rail@tmpa inside an oval
|
|
|
507 |
%
|
|
|
508 |
% \rail@coval : same as \rail@oval, but centered between \rail@x and
|
|
|
509 |
% \rail@mx
|
|
|
510 |
%
|
|
|
511 |
% \rail@frame : format \rail@box of width \rail@tmpa inside a frame
|
|
|
512 |
%
|
|
|
513 |
% \rail@cframe : same as \rail@frame, but centered between \rail@x and
|
|
|
514 |
% \rail@mx
|
|
|
515 |
%
|
|
|
516 |
% \rail@text : format \rail@box of width \rail@tmpa above the line
|
|
|
517 |
|
|
|
518 |
\newbox\rail@box
|
|
|
519 |
|
|
|
520 |
\def\rail@setbox#1{
|
|
|
521 |
\setbox\rail@box\hbox{\strut#1}
|
|
|
522 |
\rail@tmpa=\wd\rail@box
|
|
|
523 |
\divide\rail@tmpa by \railunit
|
|
|
524 |
}
|
|
|
525 |
|
|
|
526 |
\def\rail@oval{
|
|
|
527 |
\advance\rail@x by \rail@boxlf
|
|
|
528 |
\rail@eline
|
|
|
529 |
\advance\rail@tmpa by \rail@ovalsp
|
|
|
530 |
\ifnum\rail@tmpa<\rail@boxht\rail@tmpa=\rail@boxht\fi
|
|
|
531 |
\rail@tmpb=\rail@tmpa
|
|
|
532 |
\divide\rail@tmpb by 2
|
|
|
533 |
\advance\rail@y by -\rail@boxhht
|
|
|
534 |
\rail@put{\makebox(\number\rail@tmpa,\number\rail@boxht){\box\rail@box}}
|
|
|
535 |
\advance\rail@y by \rail@boxhht
|
|
|
536 |
\advance\rail@x by \rail@tmpb
|
|
|
537 |
\rail@put{\oval(\number\rail@tmpa,\number\rail@boxht)}
|
|
|
538 |
\advance\rail@x by \rail@tmpb
|
|
|
539 |
\rail@ex=\rail@x
|
|
|
540 |
\advance\rail@x by \rail@boxrt
|
|
|
541 |
}
|
|
|
542 |
|
|
|
543 |
\def\rail@coval{
|
|
|
544 |
\rail@tmpb=\rail@tmpa
|
|
|
545 |
\advance\rail@tmpb by \rail@ovalsp
|
|
|
546 |
\ifnum\rail@tmpb<\rail@boxht\rail@tmpb=\rail@boxht\fi
|
|
|
547 |
\advance\rail@tmpb by \rail@boxlf
|
|
|
548 |
\advance\rail@tmpb by \rail@boxrt
|
|
|
549 |
\rail@tmpc=\rail@mx
|
|
|
550 |
\advance\rail@tmpc by -\rail@x
|
|
|
551 |
\advance\rail@tmpc by -\rail@tmpb
|
|
|
552 |
\divide\rail@tmpc by 2
|
|
|
553 |
\ifnum\rail@tmpc>0
|
|
|
554 |
\advance\rail@x by \rail@tmpc
|
|
|
555 |
\fi
|
|
|
556 |
\rail@oval
|
|
|
557 |
}
|
|
|
558 |
|
|
|
559 |
\def\rail@frame{
|
|
|
560 |
\advance\rail@x by \rail@boxlf
|
|
|
561 |
\rail@eline
|
|
|
562 |
\advance\rail@tmpa by \rail@framesp
|
|
|
563 |
\ifnum\rail@tmpa<\rail@boxht\rail@tmpa=\rail@boxht\fi
|
|
|
564 |
\advance\rail@y by -\rail@boxhht
|
|
|
565 |
\rail@put{\framebox(\number\rail@tmpa,\number\rail@boxht){\box\rail@box}}
|
|
|
566 |
\advance\rail@y by \rail@boxhht
|
|
|
567 |
\advance\rail@x by \rail@tmpa
|
|
|
568 |
\rail@ex=\rail@x
|
|
|
569 |
\advance\rail@x by \rail@boxrt
|
|
|
570 |
}
|
|
|
571 |
|
|
|
572 |
\def\rail@cframe{
|
|
|
573 |
\rail@tmpb=\rail@tmpa
|
|
|
574 |
\advance\rail@tmpb by \rail@framesp
|
|
|
575 |
\ifnum\rail@tmpb<\rail@boxht\rail@tmpb=\rail@boxht\fi
|
|
|
576 |
\advance\rail@tmpb by \rail@boxlf
|
|
|
577 |
\advance\rail@tmpb by \rail@boxrt
|
|
|
578 |
\rail@tmpc=\rail@mx
|
|
|
579 |
\advance\rail@tmpc by -\rail@x
|
|
|
580 |
\advance\rail@tmpc by -\rail@tmpb
|
|
|
581 |
\divide\rail@tmpc by 2
|
|
|
582 |
\ifnum\rail@tmpc>0
|
|
|
583 |
\advance\rail@x by \rail@tmpc
|
|
|
584 |
\fi
|
|
|
585 |
\rail@frame
|
|
|
586 |
}
|
|
|
587 |
|
|
|
588 |
\def\rail@text{
|
|
|
589 |
\advance\rail@x by \rail@textlf
|
|
|
590 |
\advance\rail@y by \rail@textup
|
|
|
591 |
\rail@put{\box\rail@box}
|
|
|
592 |
\advance\rail@y by -\rail@textup
|
|
|
593 |
\advance\rail@x by \rail@tmpa
|
|
|
594 |
\advance\rail@x by \rail@textrt
|
|
|
595 |
}
|
|
|
596 |
|
|
|
597 |
% alternatives
|
|
|
598 |
%
|
|
|
599 |
% \rail@jx \rail@jy : current join point
|
|
|
600 |
%
|
|
|
601 |
% \rail@gx \rail@gy \rail@gex \rail@grx : global versions of \rail@x etc,
|
|
|
602 |
% to pass values over group closings
|
|
|
603 |
%
|
|
|
604 |
% \rail@mx : maximum x so far
|
|
|
605 |
%
|
|
|
606 |
% \rail@sy : starting \rail@y for alternatives
|
|
|
607 |
%
|
|
|
608 |
% \rail@jput : put at (\rail@jx,\rail@jy)
|
|
|
609 |
%
|
|
|
610 |
% \rail@joval[PART] : put \oval[PART] with adjust
|
|
|
611 |
|
|
|
612 |
\newcount\rail@jx
|
|
|
613 |
\newcount\rail@jy
|
|
|
614 |
|
|
|
615 |
\newcount\rail@gx
|
|
|
616 |
\newcount\rail@gy
|
|
|
617 |
\newcount\rail@gex
|
|
|
618 |
\newcount\rail@grx
|
|
|
619 |
|
|
|
620 |
\newcount\rail@sy
|
|
|
621 |
\newcount\rail@mx
|
|
|
622 |
|
|
|
623 |
\def\rail@jput{
|
|
|
624 |
\put(\number\rail@jx,\number\rail@jy)
|
|
|
625 |
}
|
|
|
626 |
|
|
|
627 |
\def\rail@joval[#1]{
|
|
|
628 |
\advance\rail@jx by \rail@joinadj
|
|
|
629 |
\rail@jput{\oval(\number\rail@joinsz,\number\rail@joinsz)[#1]}
|
|
|
630 |
\advance\rail@jx by -\rail@joinadj
|
|
|
631 |
}
|
|
|
632 |
|
|
|
633 |
% \rail@barsplit : incoming split for '|'
|
|
|
634 |
%
|
|
|
635 |
% \rail@plussplit : incoming split for '+'
|
|
|
636 |
%
|
|
|
637 |
|
|
|
638 |
\def\rail@barsplit{
|
|
|
639 |
\advance\rail@jy by -\rail@joinhsz
|
|
|
640 |
\rail@joval[tr]
|
|
|
641 |
\advance\rail@jx by \rail@joinhsz
|
|
|
642 |
}
|
|
|
643 |
|
|
|
644 |
\def\rail@plussplit{
|
|
|
645 |
\advance\rail@jy by -\rail@joinhsz
|
|
|
646 |
\advance\rail@jx by \rail@joinsz
|
|
|
647 |
\rail@joval[tl]
|
|
|
648 |
\advance\rail@jx by -\rail@joinhsz
|
|
|
649 |
}
|
|
|
650 |
|
|
|
651 |
% \rail@alt{SPLIT} : start alternatives with incoming split SPLIT
|
|
|
652 |
%
|
|
|
653 |
|
|
|
654 |
\def\rail@alt#1{
|
|
|
655 |
\rail@sy=\rail@y
|
|
|
656 |
\rail@jx=\rail@x
|
|
|
657 |
\rail@jy=\rail@y
|
|
|
658 |
\advance\rail@x by \rail@joinsz
|
|
|
659 |
\rail@mx=0
|
|
|
660 |
\let\rail@list=\@empty
|
|
|
661 |
\let\rail@comma=\@empty
|
|
|
662 |
\let\rail@split=#1
|
|
|
663 |
\begingroup
|
|
|
664 |
\rail@sx=\rail@x
|
|
|
665 |
\rail@rx=0
|
|
|
666 |
}
|
|
|
667 |
|
|
|
668 |
% \rail@nextalt{FIX}{Y} : start next alternative at vertical position Y
|
|
|
669 |
% and fix-up FIX
|
|
|
670 |
%
|
|
|
671 |
|
|
|
672 |
\def\rail@nextalt#1#2{
|
|
|
673 |
\global\rail@gx=\rail@x
|
|
|
674 |
\global\rail@gy=\rail@y
|
|
|
675 |
\global\rail@gex=\rail@ex
|
|
|
676 |
\global\rail@grx=\rail@rx
|
|
|
677 |
\endgroup
|
|
|
678 |
#1
|
|
|
679 |
\ifnum\rail@gx>\rail@mx\rail@mx=\rail@gx\fi
|
|
|
680 |
\ifnum\rail@grx>\rail@mx\rail@mx=\rail@grx\fi
|
|
|
681 |
\edef\rail@list{\rail@list\rail@comma\number\rail@gex:\number\rail@gy}
|
|
|
682 |
\def\rail@comma{,}
|
|
|
683 |
\rail@split
|
|
|
684 |
\let\rail@split=\@empty
|
|
|
685 |
\rail@sety{#2}
|
|
|
686 |
\rail@tmpa=\rail@jy
|
|
|
687 |
\advance\rail@tmpa by -\rail@y
|
|
|
688 |
\advance\rail@tmpa by -\rail@joinhsz
|
|
|
689 |
\rail@jput{\line(0,-1){\number\rail@tmpa}}
|
|
|
690 |
\rail@jy=\rail@y
|
|
|
691 |
\advance\rail@jy by \rail@joinhsz
|
|
|
692 |
\advance\rail@jx by \rail@joinhsz
|
|
|
693 |
\rail@joval[bl]
|
|
|
694 |
\advance\rail@jx by -\rail@joinhsz
|
|
|
695 |
\rail@ex=\rail@x
|
|
|
696 |
\begingroup
|
|
|
697 |
\rail@sx=\rail@x
|
|
|
698 |
\rail@rx=0
|
|
|
699 |
}
|
|
|
700 |
|
|
|
701 |
% \rail@barjoin : outgoing join for first '|' alternative
|
|
|
702 |
%
|
|
|
703 |
% \rail@plusjoin : outgoing join for first '+' alternative
|
|
|
704 |
%
|
|
|
705 |
% \rail@altjoin : join for subsequent alternative
|
|
|
706 |
%
|
|
|
707 |
|
|
|
708 |
\def\rail@barjoin{
|
|
|
709 |
\ifnum\rail@y<\rail@sy
|
|
|
710 |
\global\rail@gex=\rail@jx
|
|
|
711 |
\else
|
|
|
712 |
\global\rail@gex=\rail@ex
|
|
|
713 |
\fi
|
|
|
714 |
\advance\rail@jy by -\rail@joinhsz
|
|
|
715 |
\rail@joval[tl]
|
|
|
716 |
\advance\rail@jx by -\rail@joinhsz
|
|
|
717 |
\ifnum\rail@y<\rail@sy
|
|
|
718 |
\rail@altjoin
|
|
|
719 |
\fi
|
|
|
720 |
}
|
|
|
721 |
|
|
|
722 |
\def\rail@plusjoin{
|
|
|
723 |
\global\rail@gex=\rail@ex
|
|
|
724 |
\advance\rail@jy by -\rail@joinhsz
|
|
|
725 |
\advance\rail@jx by -\rail@joinsz
|
|
|
726 |
\rail@joval[tr]
|
|
|
727 |
\advance\rail@jx by \rail@joinhsz
|
|
|
728 |
}
|
|
|
729 |
|
|
|
730 |
\def\rail@altjoin{
|
|
|
731 |
\rail@eline
|
|
|
732 |
\rail@tmpa=\rail@jy
|
|
|
733 |
\advance\rail@tmpa by -\rail@y
|
|
|
734 |
\advance\rail@tmpa by -\rail@joinhsz
|
|
|
735 |
\rail@jput{\line(0,-1){\number\rail@tmpa}}
|
|
|
736 |
\rail@jy=\rail@y
|
|
|
737 |
\advance\rail@jy by \rail@joinhsz
|
|
|
738 |
\advance\rail@jx by -\rail@joinhsz
|
|
|
739 |
\rail@joval[br]
|
|
|
740 |
\advance\rail@jx by \rail@joinhsz
|
|
|
741 |
}
|
|
|
742 |
|
|
|
743 |
% \rail@eltsplit EX:Y; : split EX:Y into \rail@ex \rail@y
|
|
|
744 |
%
|
|
|
745 |
% \rail@endalt{JOIN} : end alternatives with outgoing join JOIN
|
|
|
746 |
|
|
|
747 |
\def\rail@eltsplit#1:#2;{\rail@ex=#1\rail@y=#2}
|
|
|
748 |
|
|
|
749 |
\def\rail@endalt#1{
|
|
|
750 |
\global\rail@gx=\rail@x
|
|
|
751 |
\global\rail@gy=\rail@y
|
|
|
752 |
\global\rail@gex=\rail@ex
|
|
|
753 |
\global\rail@grx=\rail@rx
|
|
|
754 |
\endgroup
|
|
|
755 |
\ifnum\rail@gx>\rail@mx\rail@mx=\rail@gx\fi
|
|
|
756 |
\ifnum\rail@grx>\rail@mx\rail@mx=\rail@grx\fi
|
|
|
757 |
\edef\rail@list{\rail@list\rail@comma\number\rail@gex:\number\rail@gy}
|
|
|
758 |
\rail@x=\rail@mx
|
|
|
759 |
\rail@jx=\rail@x
|
|
|
760 |
\rail@jy=\rail@sy
|
|
|
761 |
\advance\rail@jx by \rail@joinsz
|
|
|
762 |
\let\rail@join=#1
|
|
|
763 |
\@for\rail@elt:=\rail@list\do{
|
|
|
764 |
\expandafter\rail@eltsplit\rail@elt;
|
|
|
765 |
\rail@join
|
|
|
766 |
\let\rail@join=\rail@altjoin
|
|
|
767 |
}
|
|
|
768 |
\rail@x=\rail@mx
|
|
|
769 |
\rail@y=\rail@sy
|
|
|
770 |
\rail@ex=\rail@gex
|
|
|
771 |
\advance\rail@x by \rail@joinsz
|
|
|
772 |
}
|
|
|
773 |
|
|
|
774 |
% \rail@bar : start '|' alternatives
|
|
|
775 |
%
|
|
|
776 |
% \rail@nextbar : next '|' alternative
|
|
|
777 |
%
|
|
|
778 |
% \rail@endbar : end '|' alternatives
|
|
|
779 |
%
|
|
|
780 |
|
|
|
781 |
\def\rail@bar{
|
|
|
782 |
\rail@alt\rail@barsplit
|
|
|
783 |
}
|
|
|
784 |
|
|
|
785 |
\def\rail@nextbar{
|
|
|
786 |
\rail@nextalt\relax
|
|
|
787 |
}
|
|
|
788 |
|
|
|
789 |
\def\rail@endbar{
|
|
|
790 |
\rail@endalt\rail@barjoin
|
|
|
791 |
}
|
|
|
792 |
|
|
|
793 |
% \rail@plus : start '+' alternatives
|
|
|
794 |
%
|
|
|
795 |
% \rail@nextplus: next '+' alternative
|
|
|
796 |
%
|
|
|
797 |
% \rail@endplus : end '+' alternatives
|
|
|
798 |
%
|
|
|
799 |
|
|
|
800 |
\def\rail@plus{
|
|
|
801 |
\rail@alt\rail@plussplit
|
|
|
802 |
}
|
|
|
803 |
|
|
|
804 |
\def\rail@nextplus{
|
|
|
805 |
\rail@nextalt\rail@fixplus
|
|
|
806 |
}
|
|
|
807 |
|
|
|
808 |
\def\rail@fixplus{
|
|
|
809 |
\ifnum\rail@gy<\rail@sy
|
|
|
810 |
\begingroup
|
|
|
811 |
\rail@x=\rail@gx
|
|
|
812 |
\rail@y=\rail@gy
|
|
|
813 |
\rail@ex=\rail@gex
|
|
|
814 |
\rail@rx=\rail@grx
|
|
|
815 |
\ifnum\rail@x<\rail@rx
|
|
|
816 |
\rail@x=\rail@rx
|
|
|
817 |
\fi
|
|
|
818 |
\rail@eline
|
|
|
819 |
\rail@jx=\rail@x
|
|
|
820 |
\rail@jy=\rail@y
|
|
|
821 |
\advance\rail@jy by \rail@joinhsz
|
|
|
822 |
\rail@joval[br]
|
|
|
823 |
\advance\rail@jx by \rail@joinhsz
|
|
|
824 |
\rail@tmpa=\rail@sy
|
|
|
825 |
\advance\rail@tmpa by -\rail@joinhsz
|
|
|
826 |
\advance\rail@tmpa by -\rail@jy
|
|
|
827 |
\rail@jput{\line(0,1){\number\rail@tmpa}}
|
|
|
828 |
\rail@jy=\rail@sy
|
|
|
829 |
\advance\rail@jy by -\rail@joinhsz
|
|
|
830 |
\advance\rail@jx by \rail@joinhsz
|
|
|
831 |
\rail@joval[tl]
|
|
|
832 |
\advance\rail@jy by \rail@joinhsz
|
|
|
833 |
\global\rail@gx=\rail@jx
|
|
|
834 |
\global\rail@gy=\rail@jy
|
|
|
835 |
\global\rail@gex=\rail@gx
|
|
|
836 |
\global\rail@grx=\rail@rx
|
|
|
837 |
\endgroup
|
|
|
838 |
\fi
|
|
|
839 |
}
|
|
|
840 |
|
|
|
841 |
\def\rail@endplus{
|
|
|
842 |
\rail@endalt\rail@plusjoin
|
|
|
843 |
}
|
|
|
844 |
|
|
|
845 |
% \rail@cr{Y} : carriage return to vertical position Y
|
|
|
846 |
|
|
|
847 |
\def\rail@cr#1{
|
|
|
848 |
\rail@tmpa=\rail@sx
|
|
|
849 |
\advance\rail@tmpa by \rail@joinsz
|
|
|
850 |
\ifnum\rail@x<\rail@tmpa\rail@x=\rail@tmpa\fi
|
|
|
851 |
\rail@eline
|
|
|
852 |
\rail@jx=\rail@x
|
|
|
853 |
\rail@jy=\rail@y
|
|
|
854 |
\advance\rail@x by \rail@joinsz
|
|
|
855 |
\ifnum\rail@x>\rail@rx\rail@rx=\rail@x\fi
|
|
|
856 |
\advance\rail@jy by -\rail@joinhsz
|
|
|
857 |
\rail@joval[tr]
|
|
|
858 |
\advance\rail@jx by \rail@joinhsz
|
|
|
859 |
\rail@sety{#1}
|
|
|
860 |
\rail@tmpa=\rail@jy
|
|
|
861 |
\advance\rail@tmpa by -\rail@y
|
|
|
862 |
\advance\rail@tmpa by -\rail@boxsp
|
|
|
863 |
\advance\rail@tmpa by -\rail@joinhsz
|
|
|
864 |
\rail@jput{\line(0,-1){\number\rail@tmpa}}
|
|
|
865 |
\rail@jy=\rail@y
|
|
|
866 |
\advance\rail@jy by \rail@boxsp
|
|
|
867 |
\advance\rail@jy by \rail@joinhsz
|
|
|
868 |
\advance\rail@jx by -\rail@joinhsz
|
|
|
869 |
\rail@joval[br]
|
|
|
870 |
\advance\rail@jy by -\rail@joinhsz
|
|
|
871 |
\rail@tmpa=\rail@jx
|
|
|
872 |
\advance\rail@tmpa by -\rail@sx
|
|
|
873 |
\advance\rail@tmpa by -\rail@joinhsz
|
|
|
874 |
\rail@jput{\line(-1,0){\number\rail@tmpa}}
|
|
|
875 |
\rail@jx=\rail@sx
|
|
|
876 |
\advance\rail@jx by \rail@joinhsz
|
|
|
877 |
\advance\rail@jy by -\rail@joinhsz
|
|
|
878 |
\rail@joval[tl]
|
|
|
879 |
\advance\rail@jx by -\rail@joinhsz
|
|
|
880 |
\rail@tmpa=\rail@boxsp
|
|
|
881 |
\advance\rail@tmpa by -\rail@joinsz
|
|
|
882 |
\rail@jput{\line(0,-1){\number\rail@tmpa}}
|
|
|
883 |
\advance\rail@jy by -\rail@tmpa
|
|
|
884 |
\advance\rail@jx by \rail@joinhsz
|
|
|
885 |
\rail@joval[bl]
|
|
|
886 |
\rail@x=\rail@jx
|
|
|
887 |
\rail@ex=\rail@x
|
|
|
888 |
}
|