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setup-boxfig.tex
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setup-boxfig.tex
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\def\IgnoreLineBreaks{\catcode'15=9 \catcode'12=9}
\def\IgnoreWhiteSpace{\catcode'11=9 \catcode'40=9 \IgnoreLineBreaks}
\def\DontIgnoreWhiteSpace{\catcode'12=\active\catcode'15=5\catcode'11=10\catcode'40=10}
%\font \pipefont= lcirclew10
\font \pipefont= circle10
\font \foofont = cmr10
%\font \foofont = amr10
\IgnoreWhiteSpace
\let \adv=\advance
\def\he{height}
\def\wi{width}
\def\de{depth}
\newdimen \stroke
\stroke= \fontdimen8\pipefont % thickness of line in circles
\newdimen \radius \radius=6pt % radius of circles
\newdimen\irad \irad=\radius\advance\irad by -.5\stroke
\newdimen\orad \orad=\radius\advance\irad by .5\stroke
\newbox\BStrutbox
\setbox\BStrutbox\hbox{\vrule\wi0pt\he10pt\de10pt}
\def\BoxStrut{\unhcopy\BStrutbox}
% Arrows
\newdimen\ArrowShift
\ArrowShift=\fontdimen22\tensy
\advance\ArrowShift by -0.5\stroke
\def\StrikeOut #1
{ \setbox0\hbox{#1}
\hbox to 1\wd0
{ \vrule \he\stroke\de0pt\wi\wd0
\hskip-\wd0
\unhbox0
}
}
\def\LeftArrow
{ \hskip 0.5\stroke
\StrikeOut{\lower\ArrowShift\hbox to 10pt{\tensy\char'40\hss}}
}
\def\RightArrow
{ \StrikeOut{\lower\ArrowShift\hbox to 10pt{\hss\tensy\char'41}}
\hskip 0.5\stroke
}
\def\ArrowLine
{ \StrikeOut{\hskip 10pt\hskip 0.5\stroke}
}
\def\LeftToRight
{ \let\RightSideArrow=\ArrowLine
\let\LeftSideArrow=\RightArrow
}
\def\RightToLeft
{ \let\LeftSideArrow=\ArrowLine
\let\RightSideArrow=\LeftArrow
}
\def\NoArrows
{ \let\LeftSideArrow=\ArrowLine
\let\RightSideArrow=\ArrowLine
}
% boxes around words
\let\NonterminalFont=\tenrm
\newbox\TStrutbox
\setbox0\hbox{\NonterminalFont{Bg}}
\setbox\TStrutbox\hbox{\vrule\wi0pt\he\ht0\de\dp0}
\def\TextStrut{\unhcopy\TStrutbox}
\def\HorzLine{\hrule \he \stroke \de 0pt}
\def\HFil{\leaders\HorzLine\hfil}
\def\HFill{\leaders\HorzLine\hfill}
\def\Nonterminal#1
{\setbox1\vbox to 0pt{
\vss
\hbox{\TextStrut\NonterminalFont\space#1\space\hskip-\stroke}
\vss}
\hbox{
\BoxStrut
\LeftSideArrow
\lower\irad\vbox{
\TopSquare
\copy1
\BotSquare}
\RightSideArrow}
}
\def\TopSquare
{ \hbox{
\vrule\he\stroke\de\irad\wi\stroke
\vrule\he\stroke\de0pt\wi\wd1
\vrule\he\stroke\de\irad\wi\stroke}
}
\def\BotSquare
{ \hbox{
\vrule\he\orad\de0pt\wi\stroke
\vrule\he\stroke\de0pt\wi\wd1
\vrule\he\orad\de0pt\wi\stroke}
}
\def\\#1{\Nonterminal{#1}\HFil}
\def\last#1{{\def\RightSideArrow{}\Nonterminal{#1}}}
% piping
%\def\foo{\rlap{\foofont\char'40}}
\def\foo{\null}
\def\FulVert{\vrule \wi\stroke\foo\hskip-\stroke}
\def\TopVert{\vrule\de-\irad \wi\stroke\foo\hskip-\stroke}
\def\BotVert{\vrule\he-\orad \wi\stroke\foo\hskip-\stroke}
\def\Center#1,#2.
{\hskip\radius\foo#1\lower.5\stroke\hbox{\pipefont#2}\hskip\radius}
\def\ru{\char'10\hskip -2\radius}
\def\rd{\char'11\hskip -2\radius}
\def\ld{\char'12\hskip -2\radius}
\def\lu{\char'13\hskip -2\radius}
\def\thru{\hskip-\radius\vrule\he\stroke\de0pt\wi2\radius\hskip\radius\hskip-2\radius}
\def\Center#1,#2.
{\foo\hskip\radius#1{\pipefont#2\unskip}\hskip-\radius}
\def\LT{\Center\BotVert,\lu.}
\def\LU{\Center\FulVert,\lu.}
\def\LL{\Center\FulVert,\ld.}
\def\LB{\Center\TopVert,\ld.}
\def\LMid{\Center\TopVert\BotVert,\rd\ru\thru.}
\def\LMU{\Center\TopVert,\rd\thru.}
\def\LML{\Center\BotVert,\ru\thru.}
\def\LFD{\Center\FulVert,\ru\thru.}
\def\LS{\Center\TopVert\BotVert,\rd\ru.}
\def\RT{\Center\BotVert,\ru.}
\def\RU{\Center\FulVert,\ru.}
\def\RL{\Center\FulVert,\rd.}
\def\RB{\Center\TopVert,\rd.}
\def\RMid{\Center\TopVert\BotVert,\ld\lu\thru.}
\def\RMU{\Center\TopVert,\ld\thru.}
\def\RML{\Center\BotVert,\lu\thru.}
\def\Cross{\Center\FulVert,\thru.}
\def\LR{\Center,\thru.}
\def\TB{\Center\FulVert,.}
% ShiftBox
\newbox\x
\newbox\y
\newbox\tempy
\newbox\z
\newbox\tempz
\def\ShiftBox#1{
\savemod
\saverulebox
\setbox\x
\vbox{ \everycr{\noalign{{\modifyrulebox\global\setbox\z\hbox{}}}}
\halign{&\setbox\x\hbox{##}
\global \setbox\z\hbox{\unhbox\z\vrule\he\ht\x\de\dp\x\wi0pt}
\unhbox\x
\cr
#1}}%
\lower\ht\y\box\x\HFil
\restoremod
\restorerulebox
}
\def\saverulebox{
\setbox\tempy\box\y
\global \setbox\y\vbox{}
\setbox\tempz\box\z
\global \setbox\z\hbox{}
}
\def\restorerulebox{
\global \setbox\y\box\tempy
\global \setbox\z\box\tempz
}
\def\topmod{}
\def\thisrow{\global\let\modifyrulebox\firstmod}
\def\firstmod{
\global\setbox\y\vbox{\hrule\he0pt\wi0pt\de\dp\z}
\global\let\modifyrulebox\latermod
}
\def\latermod{
\global\setbox\y\vbox{\unvbox\y\hrule\he\ht\z\de\dp\z\wi0pt}
}
\def\savemod{
\let\tempmod\modifyrulebox
\global \let\modifyrulebox\topmod
}
\def\restoremod{
\global\let\modifyrulebox\tempmod
}
\DontIgnoreWhiteSpace