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% Rolf Niepraschk -- Rolf.Niepraschk@gmx.de
% showframe.sty
%
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3
% of this license or (at your option) any later version.
% The latest version of this license is in
% http://www.latex-project.org/lppl.txt
% and version 1.3 or later is part of all distributions of LaTeX
% version 2003/12/01 or later.
%
% This work has the LPPL maintenance status "author-maintained".
% Draws visible frames for the text and margin area, and lines
% for the head and foot to check layout in detail. Using the package
% option "noframe" you can draw the frames later only for a single
% page with \AddToShipoutPicture*{\ShowFramePicture}. Another useful
% options maybe eso-pic's "colorgrid", "grid" and "texcoord".
%
% \ShowFrameColor and \ShowFrameLinethickness can be used to change
% the frames.
\ProvidesPackage{showframe}[2020/10/14 v0.1j showframe (new impl., RN)]
\newif\ifSF@frame\SF@frametrue
\DeclareOption{noframe}{\SF@framefalse}
\DeclareOption*{\PassOptionsToPackage{\CurrentOption}{eso-pic}}
\ProcessOptions\relax
\RequirePackage{eso-pic}[2002/10/30]
\newcommand*\ShowFrameColor{\normalcolor}
\newcommand*\ShowFrameLinethickness{.8pt}
\newdimen\SF@tempdima
\newcommand\ShowFramePicture{%
\begingroup
\ShowFrameColor\linethickness{\ShowFrameLinethickness}%
\AtPageLowerLeft{%
\framebox(\paperwidth,\paperheight){}}%
\AtTextLowerLeft{%
\framebox(\textwidth,\textheight){}}%
\AtTextUpperLeft{%
\put(0,\headsep){%
\framebox(\textwidth,\headheight){}}}%
\AtTextLowerLeft{%
\put(0,-\footskip){%
\line(1,0){\textwidth}}}%
\AtTextLowerLeft{%
\SF@tempdima=\textwidth\advance\SF@tempdima\marginparsep%
\if@twoside
\ifodd\c@page\else
\if@mparswitch
\SF@tempdima=-\marginparsep\advance\SF@tempdima-\marginparwidth
\fi
\fi
\fi
\put(\SF@tempdima,0)%
{\framebox(\marginparwidth,\textheight){}}%
}%
\endgroup
}
\ifSF@frame\AddToShipoutPictureFG{\ShowFramePicture}\fi
\endinput
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