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% \iffalse
% +AMDG This document was begun on 19 April 1202, the
% feast of St. Anselm, and it is humbly dedicated to him
% and to the Immaculate Heart of Mary for
% their prayers, and to the Sacred Heart of Jesus for His
% mercy.
%
% This document is copyright 2018 by Donald P. Goodman, and is
% released publicly under the LaTeX Project Public License. The
% distribution and modification of this work is constrained by the
% conditions of that license. See
% http://www.latex-project.org/lppl.txt
% for the text of the license. This document is released
% under version 1.3 of that license, and this work may be distributed
% or modified under the terms of that license or, at your option, any
% later version.
%
% This work has the LPPL maintenance status 'maintained'.
%
% The Current Maintainer of this work is Donald P. Goodman
% (dgoodmaniii@gmail.com).
%
% This work consists of clrdblpg.dtx, clrdblpg.ins, and
% derived files clrdblpg.sty and clrdblpg.pdf.
% \fi
% \iffalse
%<package>\NeedsTeXFormat{LaTeX2e}[1999/12/01]
%<package>\ProvidesPackage{clrdblpg}[2018/04/21 v1.0 Control page style of blank pages]
%<*driver>
\documentclass{ltxdoc}
\usepackage{doc}
\usepackage{xurl}
\usepackage{luatex85}
\usepackage{lmodern}
\usepackage[]{clrdblpg}
\usepackage[colorlinks]{hyperref}
\begin{document}
\DocInput{clrdblpg.dtx}
\end{document}
%</driver> \fi
%
% \title{The |clrdblpg| Package, v1.0}
% \author{Donald P.\ Goodman III}
% \date{\today}
%
% \maketitle
%
% \begin{abstract}
% \noindent
% This tiny package allows easy manipulation of the headers
% and footers on pages left blank by |\cleardoublepage|. By
% default, \LaTeX\ has no easy facilities for this. This
% package uses more or less the algorithm listed in the
% |fancyhdr| package documentation, with some added
% flexibility thrown in.
% \end{abstract}
%
% \tableofcontents
%
% \section{Introduction}
%
% \LaTeX\ clears double pages when using certain classes
% because certain divisions, such as chapters, must normally
% start on recto (odd) pages. This sometimes results in a
% page which is blank. However, \LaTeX\ puts the normal
% page dressings on these blank pages. This might be the
% right decision in certain cases; but in other cases, it's
% certainly wrong. Yet there is no easy way to change this
% behavior.
%
% \section{Usage}
%
% So here's |clrdblpg|. This tiny package takes an
% algorithm redefining the normal \LaTeX\ command
% |\cleardoublepage| from the |fancyhdr| documentation (by
% Piet van Oostrum and George Gr{\"a}tzer), but indents it
% better and adds the ability to control which page style
% will be applied to the blank pages.
%
% To see the original algorithm, and the excellent
% |fancyhdr| package which you should almost certainly
% already be using, see \url{http://ctan.org/pkg/fancyhdr}.
%
% To use the package, simply load the package |clrdblpg|
% with the |style| option expressing what page style you
% want. The default is to set the blank pages as having
% page style |empty|, so if that's what you want, you do not
% need to list an option.
%
% \begin{center}
% \begin{tabular}{lp{0.4\textwidth}}
% |\usepackage{clrdblpg}| & Leaves cleared verso pages
% empty, with neither header nor footer \\
% |\usepackage[style=empty]{clrdblpg}| & Leaves cleared verso pages
% empty, with neither header nor footer \\
% |\usepackage[style=plain]{clrdblpg}| & Leaves cleared verso pages
% with the |plain| style, meaning no header and a
% centered page number for a footer \\
% \end{tabular}
% \end{center}
%
% Obviously, any page style (defined by \LaTeX, some class
% or package, or you) can be used instead.
%
% And that's it for this little package.
%
% \section{Implementation}
%
% Start with a reasonable default. I don't personally think
% the \LaTeX\ default here is reasonable, so I've not done
% it. I think |empty| makes sense; hence, the default.
% \begin{macrocode}
\def\clrdblpg@pagestyle{empty}%
% \end{macrocode}
% Require |xkeyval|, and set our package option.
% \begin{macrocode}
\RequirePackage{xkeyval}
\DeclareOptionX{style}{\def\clrdblpg@pagestyle{#1}}
\ProcessOptionsX
% \end{macrocode}
% Now define the command. This is taken directly from the
% documentation of the |fancyhdr| package
% (\url{http://ctan.org/pkg/fancyhdr}),
% but with better
% indentation and the ability to select a pagestyle for the
% blank page.
% \begin{macrocode}
\def\cleardoublepage{%
\clearpage%
\if@twoside%
\ifodd%
\c@page%
\else%
\hbox{}%
\vspace*{\fill}%
\thispagestyle{\clrdblpg@pagestyle}%
\newpage%
\if@twocolumn%
\hbox{}%
\newpage%
\fi%
\fi%
\fi%
}%
% \end{macrocode}
% And there's the |clrdblpg| package. I hope it proves
% useful to someone besides myself. Happy \TeX{}ing!
%
% \PrintIndex
|
