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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /info/metapost/doc/russian/mpman-ru/ctabbing.sty
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+% Public domain.
+%
+% The ctabbing environment is a centered tabbing environment suitable for
+% displaying program fragments. The vertical spacing is exactly like that
+% for normal text in a center environment. This is achieved by setting
+% \@minipagetrue to fool \tabbing into thinking that it starts a minipage
+% and should therefore avoid all vertical space at the top. (Note that any
+% space at all would defeat the \vtop command in \ctabbing.) The
+% \vskip-\lastskip and \prevdepth saving commands avoid extra space after
+% \endtabbing
+
+\newdimen\ct@pd
+
+\def\ctabbing{\center\leavevmode\vtop\bgroup\@minipagetrue\begingroup\tabbing}
+
+\def\endctabbing{\endtabbing\endgroup\vskip-\lastskip
+ \global\ct@pd\prevdepth \egroup
+ \endcenter \global\prevdepth\ct@pd}