Plan 9 from Bell Labs’s /usr/web/sources/contrib/steve/root/sys/lib/texmf/doc/latex/geometry/showframe.sty

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%%
%%  showframe.sty  for LaTeX2e/209
%%  Created by UMEKI, Hideo (1996/04/11)
%%
%%  Partly borrowed from
%%      pageframe.sty  by Cameron Smith
%%      18 Sept 1990, 16 Oct 1990, 21 Nov 1990, 14 Nov 1991
%%      [email protected]  or  [email protected]
%%
%%  \usepackage{showframe} for 2e, 
%%  or \documentstyle[showframe]{article} for 209,
%%  draws page frame in each page.
%%
%%  Command \printparam is useful to print LaTeX parameters
%%  for page layout. This should be used after \begin{document}
%%  where you want to print them. 
%%
\@ifundefined{@@@innerframe}{}{\endinput}

\def\@@@innerframe{\vbox to 0pt{%
\vskip\topmargin\vbox to 0pt{\vss\hrule width\textwidth}%
\vskip\headheight\vbox to 0pt{\vss\hrule width\textwidth}%
\vskip\headsep\vbox to 0pt{\vss\hrule width\textwidth}%
\hbox to \textwidth{\llap{\vrule height\textheight}\hfil% 
\vrule height\textheight}%
\vbox to 0pt{\vss\hrule width\textwidth}%
\vskip \footskip\vbox to 0pt{\vss\hrule width\textwidth}%
\@ifundefined{footheight}{}{\vskip -\footheight}
\vbox to 0pt{\vss\hrule width\textwidth}%
\vss
}}

\newif\if@latextwoe
\@ifundefined{if@compatibility}{\@latextwoefalse}{\@latextwoetrue}

\if@latextwoe
%%%
%%%    from latex.ltx (Release 1995/12/01)
%%%
\def\@outputpage{%
\begingroup           % the \endgroup is put in by \aftergroup
  \let \protect \noexpand
  \@resetactivechars
  \let\-\@dischyph
  \let\'\@acci\let\`\@accii\let\=\@acciii
  \let\\\@normalcr
  \let\par\@@par          %% 15 Sep 87
  \shipout \vbox{%
    \set@typeset@protect
    \aftergroup \endgroup
    \aftergroup \set@typeset@protect
                                % correct? or just restore by ending
                                % the group?
  \if@specialpage
    \global\@specialpagefalse\@nameuse{ps@\@specialstyle}%
  \fi
  \if@twoside
    \ifodd\count\z@ \let\@thehead\@oddhead \let\@thefoot\@oddfoot
         \let\@themargin\oddsidemargin
    \else \let\@thehead\@evenhead
       \let\@thefoot\@evenfoot \let\@themargin\evensidemargin
    \fi
  \fi
  \reset@font
  \normalsize
  \baselineskip\z@skip \lineskip\z@skip \lineskiplimit\z@
    \@begindvi
    \moveright\@themargin %<<<<<<<<<<<<<<<<<<<<< added
    \vtop{\@@@innerframe  %<<<<<<<<<<<<<<<<<<<<< added
    \vskip \topmargin
%%  \moveright\@themargin \vbox { %<<<<<<<<<<<< original
      \vbox {             %<<<<<<<<<<<<<<<<<<<<< modified
      \setbox\@tempboxa \vbox to\headheight{%
        \vfil
        \color@hbox
          \normalcolor
          \hb@xt@\textwidth {%
            \let \label \@gobble
            \let \index \@gobble
            \let \glossary \@gobble %% 21 Jun 91
            \@thehead
            }%
        \color@endbox
        }%                        %% 22 Feb 87
      \dp\@tempboxa \z@
      \box\@tempboxa
      \vskip \headsep
      \box\@outputbox
      \baselineskip \footskip
      \color@hbox
        \normalcolor
        \hb@xt@\textwidth{%
          \let \label \@gobble
          \let \index \@gobble      %% 22 Feb 87
          \let \glossary \@gobble   %% 21 Jun 91
          \@thefoot
          }%
      \color@endbox
      }}%<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< One more close bracket added 
    }%
\global \@colht \textheight
\stepcounter{page}%
\let\firstmark\botmark
}
\else
\@ifundefined{reset@font}{\let\reset@font\empty}{}
%%%
%%%    from LATEX VERSION 2.09 <25 March 1992>
%%%
\def\@outputpage{\begingroup\catcode`\ =10
     \let\-\@dischyph \let\'\@acci \let\`\@accii \let\=\@acciii
    \if@specialpage
     \global\@specialpagefalse\@nameuse{ps@\@specialstyle}\fi
     \if@twoside
       \ifodd\count\z@ \let\@thehead\@oddhead \let\@thefoot\@oddfoot
            \let\@themargin\oddsidemargin
          \else \let\@thehead\@evenhead
          \let\@thefoot\@evenfoot \let\@themargin\evensidemargin
     \fi\fi
     \shipout
     \vbox{\reset@font %% RmS 91/08/15
           \normalsize \baselineskip\z@ \lineskip\z@
           \let\par\@@par %% 15 Sep 87
           \moveright\@themargin                    %<<<<<<<<< added
           \vtop{\@@@innerframe                     %<<<<<<<<< added
           \vskip \topmargin                        %<<<<<<<<< added
%%         \vskip \topmargin \moveright\@themargin  %<<<<<<<<< original
           \vbox{\setbox\@tempboxa
                   \vbox to\headheight{\vfil \hbox to\textwidth
                                       {\let\label\@gobble \let\index\@gobble
                                        \let\glossary\@gobble %% 21 Jun 91
                                         \@thehead}}% %% 22 Feb 87
                 \dp\@tempboxa\z@
                 \box\@tempboxa
                 \vskip \headsep
                 \box\@outputbox
                 \baselineskip\footskip
                 \hbox to\textwidth{\let\label\@gobble
                           \let\index\@gobble  %% 22 Feb 87
                           \let\glossary\@gobble %% 21 Jun 91
%%                         \@thefoot}}}\global\@colht\textheight  %<<<<< original 
                           \@thefoot}}}     %<<<<<<<<<<<<<<<<<<<<<<<< added
                 }                          %<<<<<<<<<<<<<<<<<<<<<<<< added
                 \global\@colht\textheight  %<<<<<<<<<<<<<<<<<<<<<<<< added

           \endgroup\stepcounter{page}\let\firstmark\botmark}
\fi
%%
%%  \printparam
%%
\def\printparam{%\clearpage
\noindent
\null\vfill
\begin{center}\footnotesize
\begin{tabular}[t]{l}
\@ifundefined{paperwidth}{}{paperwidth=\the\paperwidth\\}
\@ifundefined{paperheight}{}{paperheight=\the\paperheight\\}
textwidth=\the\textwidth\\
textheight=\the\textheight\\
hoffset=\the\hoffset\\
voffset=\the\voffset\\
topmargin=\the\topmargin\\
topskip=\the\topskip\\
headheight=\the\headheight\\
headsep=\the\headsep\\
footskip=\the\footskip\\
\@ifundefined{footheight}{}{\footheight=\the\footheight\\}
oddsidemargin=\the\oddsidemargin\\
evensidemargin=\the\evensidemargin\\
marginparwidth=\the\marginparwidth\\
marginparsep=\the\marginparsep\\
marginparpush=\the\marginparpush
\end{tabular}
\begin{tabular}[t]{l}
\@tempdima=1pc\relax 1pc = \the\@tempdima\\
\@tempdima=1in\relax 1in = \the\@tempdima\\
\@tempdima=1cm\relax 1cm = \the\@tempdima\\[1em]
In {\tt\char`\\{}normalsize}\\
{\normalsize\@tempdima=1em\relax \footnotesize 1em = \the\@tempdima%
{\normalsize ~(M)}}\\
{\normalsize\@tempdima=1ex\relax \footnotesize 1ex = \the\@tempdima%
{\normalsize ~(x)}}
\end{tabular}
\end{center}
\vfill\null
\clearpage}
%%
\endinput

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