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% \iffalse meta-comment
%
% Copyright (C) 2013 by Scott Lawrence <bytbox@gmail.com>
% ---------------------------------------------------------------------------
% 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 2005/12/01 or later.
%
% This work has the LPPL maintenance status `maintained'.
%
% The Current Maintainer of this work is Scott Lawrence.
%
% This work consists of the files vgrid.dtx and vgrid.ins
% and the derived filebase vgrid.sty.
%
% \fi
%
% \iffalse
%<*driver>
\ProvidesFile{vgrid.dtx}
%</driver>
%<package>\NeedsTeXFormat{LaTeX2e}[1999/12/01]
%<package>\ProvidesPackage{vgrid}
%<*package>
[2013/12/20 0.1 Overlays a vertical grid]
%</package>
%
%<*driver>
\documentclass{ltxdoc}
\EnableCrossrefs
\CodelineIndex
\RecordChanges
\usepackage{vgrid}
\begin{document}
\DocInput{vgrid.dtx}
\PrintChanges
\PrintIndex
\end{document}
%</driver>
% \fi
%
% \CheckSum{72}
%
% \CharacterTable
% {Upper-case \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
% Lower-case \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
% Digits \0\1\2\3\4\5\6\7\8\9
% Exclamation \! Double quote \" Hash (number) \#
% Dollar \$ Percent \% Ampersand \&
% Acute accent \' Left paren \( Right paren \)
% Asterisk \* Plus \+ Comma \,
% Minus \- Point \. Solidus \/
% Colon \: Semicolon \; Less than \<
% Equals \= Greater than \> Question mark \?
% Commercial at \@ Left bracket \[ Backslash \\
% Right bracket \] Circumflex \^ Underscore \_
% Grave accent \` Left brace \{ Vertical bar \|
% Right brace \} Tilde \~}
%
%
% \changes{1}{2013/12/20}{Converted to DTX file}
%
% \DoNotIndex{\newcommand,\newenvironment}
%
% \GetFileInfo{vgrid.dtx}
% \title{The \textsf{vgrid} package}
% \author{Scott Lawrence\\ \texttt{bytbox@gmail.com}}
% \date{\fileversion~from \filedate}
%
% \maketitle
%
% \section{Introduction}
%
% The \texttt{vgrid} package overlays a grid intended to help the author
% enforce vertical rhythm on each page. The spacing of the grid is taken from
% \verb|\baselineskip|, with the first line at the top of the text area.
%
% Note that \texttt{vgrid} itself does not change any spacing -- other packages
% (or careful font settings) must be used to achieve vertical rhythm. This document, for example, can be clearly seen to not have vertical rhythm.
%
% \section{Usage}
%
% To add a grid to each page, just place \verb|\usepackage{vgrid}| in your
% document's preamble. As of this version, there is no fine-grained control to
% allow grids to be excluded from certain pages. The grid will use
% \verb|\baselineskip| as the line height.
%
%
% \StopEventually{}
%
% \section{Implementation}
%
% \iffalse
%<*package>
% \fi
%
% \begin{macrocode}
\RequirePackage{everypage}
\RequirePackage{tikz}
\RequirePackage{ifoddpage}
\newlength\vgrid@l \setlength\vgrid@l{\baselineskip}
\newlength\vgrid@y
\AddEverypageHook{
% \end{macrocode}
% For every page, we need to re-calculate the coordinates of the grid.
% \begin{macrocode}
\def\@csm{\ifoddpageoroneside\oddsidemargin\else\evensidemargin\fi}
\def\@left{\hoffset+\@csm}
\def\@right{\@left+\textwidth}
\def\@top{-\voffset-\topmargin-\headheight-\headsep}
\def\@gridline{\draw [thin, gray]}
\begin{tikzpicture}[overlay]
\def\y{\@top-\vgrid@y}
\@gridline (\@left, \@top) -- (\@left, \@top-\textheight);
\@gridline (\@right, \@top) -- (\@right, \@top-\textheight);
\setlength\vgrid@y{0pt}
\@whiledim\vgrid@y<\textheight\do{
\@gridline (\@left, \y) -- (\@right, \y);
\addtolength{\vgrid@y}{\vgrid@l}
}
\@gridline (\@left, \y) -- (\@right, \y);
\end{tikzpicture}
}
% \end{macrocode}
%
% \iffalse
%</package>
% \fi
%
% \Finale
\endinput
|
