95 lines
3.2 KiB
TeX
95 lines
3.2 KiB
TeX
% Latex Macros for Lisp code in text.
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% Based on macros found in C. Rich's library.
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\makeatletter
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% \vobeyspaces turns all spaces into non-breakable spaces.
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% Note: this is like \@vobeyspaces except without spurious space in defn.
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{\catcode`\ =\active\gdef\vobeyspaces{\catcode`\ =\active\let =\@xobeysp}}
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% \def\vobeytabs turns all tabs into 8 non-breakable spaces
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{\catcode`\^^I=\active\gdef\vobeytabs{\catcode`\^^I=\active\let^^I=\xvobeytabs}}
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\def\xvobeytabs{\@xobeysp\@xobeysp\@xobeysp\@xobeysp\@xobeysp\@xobeysp\@xobeysp\@xobeysp}
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% \vobeylines turns all cr's into non-breakable \par's
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{\catcode`\^^M=\active\gdef\vobeylines{\catcode`\^^M=\active\let^^M=\xvobeylines}}
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\def\xvobeylines{\par\penalty10000}
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% \obeycrsp turns cr's into non-breakable spaces
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{\catcode`\^^M=\active\gdef\obeycrsp{\catcode`\^^M=\active\let^^M=\@xobeysp}}
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%% \@noligs prevents ?` and !` from being treated as ligatures
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%% added 19 April 86 [copied from Latex sources]
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\begingroup
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\catcode``=13
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\gdef\@noligs{\let`=\@lquote}
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\endgroup
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% Set up code environment, in which most of the common special characters
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% appearing in code are treated verbatim, namely: _ # & ^ $ ~ @ " %
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% *** JAR NEEDED $ AND _ IN SOME CODE ***
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% Note: \ { } are still enabled so that macros can be called in this
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% environment. Use \\, \{ and \} to use these characters verbatim
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% in this environment.
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% Note: this environment allows no breaking of lines whatsoever; not
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% at spaces or hypens. To arrange for a break use the standard \- macro,
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% or the \= macro which breaks, but inserts nothing. This is useful,
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% for example for allowing hypenated identifiers to be broken, e.g.
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% FOO-\=BAR.
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\def\setupcode{\parsep=0pt\parindent=0pt
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\tt\frenchspacing\catcode``=13\@noligs%
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\def\\{\char`\\}%
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\@makeother\#\@makeother\&\@makeother\^%\@makeother\_\@makeother\$%
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\@makeother\`\@makeother\'%
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\@makeother\~\@makeother\@\@makeother\"\@makeother\%\vobeytabs\vobeyspaces}
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% Code environment as described above. Note that blank lines are
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% not preserved, and lines are not kept on one page. Code is
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% indented by the same amount as quotes.
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% Note: to increase left margin, use \leftmargini=1in.
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% was {\list{}{\parsep=0pt}\item[]\setupcode\obeylines}%
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% then {\list{\parsep=0pt\listparindent=0pt\leftmargin=0pt}{}\item[]\setupcode%
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\newenvironment{bigcode}%
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{\list{}{\parsep=0pt\leftmargin=0pt\labelwidth=0pt\itemindent=0pt%
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\listparindent=0pt}\item[]\setupcode%
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\obeylines}%
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{\endlist}
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% Code is just like bigcode, but everything inside is kept on one page
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% Note: This actually works by setting a huge penalty for breaking
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% between lines of code.
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% was {\list{}{\parsep=0pt}\item[]\setupcode\vobeylines}%
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\newenvironment{code}%
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{\list{}{\parsep=0pt\leftmargin=0pt\labelwidth=0pt\itemindent=0pt%
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\listparindent=0pt}\item[]\setupcode%
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\vobeylines}%
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{\endlist}
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% Reasonable separation between lines of code
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\newcommand{\codeskip}{\penalty0\vspace{2ex}}
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% \cd is used to build a code environment in the middle of text.
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% Note: only difference from display code is that cr's are taken
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% as unbreakable spaces instead of \par's.
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\newcommand{\cd}{\begingroup\setupcode\obeycrsp\startcode}
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\newcommand{\startcode}[1]{#1\endgroup}
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%\setbox0\hbox{\@xobeysp}\hline{43\wd0}
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\makeatother
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