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Filename : showframe.sty
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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}[2011/02/24 v0.1i 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}

\newcommand\ShowFramePicture{%
  \begingroup
    \ShowFrameColor\linethickness{\ShowFrameLinethickness}%
    \AtPageLowerLeft{%
      \framebox(\LenToUnit{\paperwidth},\LenToUnit{\paperheight}){}}%
    \AtTextLowerLeft{%
      \framebox(\LenToUnit{\textwidth},\LenToUnit{\textheight}){}}%
    \AtTextUpperLeft{%
      \put(0,\LenToUnit{\headsep}){%
        \framebox(\LenToUnit{\textwidth},\LenToUnit{\headheight}){}}}%
    \AtTextLowerLeft{%
      \put(0,\LenToUnit{-\footskip}){%
        \line(1,0){\LenToUnit{\textwidth}}}}%
    \AtTextLowerLeft{%
      \@tempdima=\textwidth\advance\@tempdima\marginparsep%
      \if@twoside
        \ifodd\c@page\else
          \if@mparswitch
            \@tempdima=-\marginparsep\advance\@tempdima-\marginparwidth
          \fi
        \fi
      \fi
      \put(\LenToUnit{\@tempdima},0)%
        {\framebox(\LenToUnit{\marginparwidth},\LenToUnit{\textheight}){}}%
    }%
  \endgroup
}

\ifSF@frame\AddToShipoutPictureFG{\ShowFramePicture}\fi

\endinput