% \iffalse
%<*driver>
\documentclass{ltxdoc}
\usepackage[latin1]{inputenc}
\usepackage{frcursive,url}
\title{French Cursive for \LaTeX}
\author{Emmanuel \textsc{Beffara}\\\url{manu@beffara.org}}
\date{version 1.2, February 2nd, 2004}
\begin{document}
\DocInput{frcursive.dtx}
\end{document}
%</driver>
% \fi
% \maketitle
%
% \section{Presentation}
%
% French Cursive is a cursive hand-writing font family. Its design is based on
% the French academic tradition for running-hand. The base shape is upright
% with lightly contrasted stems and hairlines. All lowercase letters are
% connected, but most uppercase are independent.
%   \vspace{-3ex}
% \begin{center}
%   \newcommand{\exmpl}[2]{%
%     #1&\cursive#2\relax The quick brown fox jumps over the lazy dog.}
%   \linespread{1.5}\selectfont
%   \begin{tabular}{ll}
%     style & example \\ \hline \noalign{\smallskip}
%     \exmpl{regular}{} \\
%     \exmpl{bold-extended}{\bfseries} \\
%     \exmpl{slanted}{\slshape} \\
%     \exmpl{calligraphic}{\calseries} \\
%     \exmpl{fixed-thickness}{\ftseries} \\
%     wide & \cursive\wideseries The quick brown fox jumps \dots \\
%     \exmpl{academic}{\acadshape}
%   \end{tabular}
% \end{center}
% The extra styles come with associated macros:
% \begin{center}
%   \begin{tabular}{lll}
%     style & environment & local macro \\ \hline
%     cursive & \texttt{cursive} & \texttt{\string\textcursive} \\
%     calligraphic & \texttt{calseries} & \texttt{\string\textcal} \\
%     fixed-thickness & \texttt{ftseries} & \texttt{\string\textft} \\
%     wide & \texttt{wideseries} & \texttt{\string\textwide} \\
%     academic & \texttt{acadshape} & \texttt{\string\textacad} \\
%   \end{tabular}
% \end{center}
%
% For a given design size, the choice was made to make the base height (1\,ex)
% equal to the one for Computer Modern faces, \mbox{i.e.} small letters like
% ``a'' have the same height in both fonts at 10pt (namely $155/36$ points).
% As you can see, the ascending and descending loops are larger than the
% largest letters in Computer Modern and other roman fonts. For this reason,
% the space between lines has to be augmented a lot. We must actually use a
% |\linespread| value of $3/2$ in paragraphs that contain cursive text.
%
% Inter-letter links are inserted using a complex ligature system. Since
% ligatures are incompatible with \TeX's way of composing accented letters,
% all accented letters have to be provided by the font itself, therefore the
% encoding used is T1. Though technically the font can be used in standard OT1
% encoding, this is only suitable if no accented character is to be used,
% therefore OT1 encoding is not the default.
%
% \section{Interface}
%
%    \begin{macrocode}
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{frcursive}
  [2004/02/01 v1.2 support package for French Cursive]
%    \end{macrocode}
%
% \subsection{Package options}
%
% \begin{macro}{OT1}
% The default encoding used for the font is T1, but we provide the option
% ``OT1'' to use this encoding instead.
%    \begin{macrocode}
\newcommand{\frcursive@enc}{T1}
\DeclareOption{OT1}{%
  \renewcommand{\frcursive@enc}{OT1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{default}
% By default we don't change the font for the whole document. However, one
% might want to typeset a whole text in French Cursive. For this purpose, we
% provide the option ``default''. We must delay the redefinition of the
% default face in order to take care of these encoding issues.
%    \begin{macrocode}
\newif\if@frcursive@default
\@frcursive@defaultfalse
\DeclareOption{default}{%
  \@frcursive@defaulttrue}
%    \end{macrocode}
% \end{macro}
%
% These are the only options we provide.
%    \begin{macrocode}
\ProcessOptions\relax
%    \end{macrocode}
%
% Now we can change fonts if asked for it.
%    \begin{macrocode}
\if@frcursive@default
\renewcommand{\rmdefault}{frc}
\linespread{1.5}
\RequirePackage[T1]{fontenc}
\fi
%    \end{macrocode}
%
%
% \subsection{Macros}
%
% \begin{macro}{\cursive}
% The main macro we define is obviously the one that switches to cursive font.
% What it has to do is change the font family and encoding, and also change
% the line spread, because letters in French Cursive are larger. We define
% this as an environment because it can be used either in plain \TeX\ style as
% |{\cursive |\emph{text}|}| or as a \LaTeX\ environment.
%    \begin{macrocode}
\newenvironment{cursive}{%
  \fontencoding{\frcursive@enc}%
  \fontfamily{frc}%
  \linespread{1.5}%
  \selectfont}{%
  \par}
%    \end{macrocode}
% For the sake of completeness, we provide the alternative form for short
% cursive texts as |\textcursive{|\emph{text}|}|:
%    \begin{macrocode}
\newcommand{\textcursive}[1]{{\cursive#1}}
%    \end{macrocode}
% However, take care that the effect of the |\linespread| macro only appears
% when changing paragraphs, which means that the |\par| must appear inside the
% group where |\cursive| is used. That is why we put it at the end of the
% |cursive| environment.
% \end{macro}
%
% \begin{macro}{\calseries}
% \begin{macro}{\textcal}
% One of the variants of the typeface is called ``calligraphic''. It is a
% series like ``medium'' and ``bold'', with strong stems and thing hairlines.
% We thus provide a macro to use this series. Using this macro when not using
% the \texttt{frc} family will not work.
%    \begin{macrocode}
\newenvironment{calseries}{\fontseries{cal}\selectfont}{}
%    \end{macrocode}
% We also provide a variant of this macro in the style of |\textbf|:
%    \begin{macrocode}
\newcommand{\textcal}[1]{{\calseries#1}}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\ftseries}
% \begin{macro}{\textft}
% Another variant is called ``fixed-thickness'', it is also a series like
% ``medium'' and ``bold'', but with a constant line thickness We provide a
% macro to use this series. As before, using this macro when not using the
% \texttt{frc} family will not work.
%    \begin{macrocode}
\newenvironment{ftseries}{\fontseries{ft}\selectfont}{}
\newcommand{\textft}[1]{{\ftseries#1}}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\wideseries}
% \begin{macro}{\textwide}
% There is a variant with wide inter-letter links, we declare it a as a new
% series called ``wide''. This is also specific to French Cursive.
%    \begin{macrocode}
\newenvironment{wideseries}{\fontseries{w}\selectfont}{}
\newcommand{\textwide}[1]{{\wideseries#1}}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\acadshape}
% \begin{macro}{\textacad}
% In the same spirit, we now define a pair of macros for accessing the
% ``academic'' shape, the one with integer height ratios between base height,
% ascenders and descenders. This also will not work with other font families.
%    \begin{macrocode}
\newenvironment{acadshape}{\fontshape{ac}\selectfont}{}
\newcommand{\textacad}[1]{{\acadshape#1}}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
%
% \subsection{Workbook lines}
%
% The following macro is an experimental mechanism for drawing horizontal
% lines behind cursive text, in the style of children's workbooks.
% \begin{center}
%   \cursive\acadshape
%   \seyes{Here is an example of its behaviour.}
% \end{center}
% I took this idea from C. Verchery's typeface family Plum. His approach was
% to create a version (named Seyes) with the lines in them. Although this
% would be rather trivial to implement with Metafont, it would not work with
% \TeX, in particular because of its handling of spaces. Therefore my approach
% is to put the rules using \TeX\ commands, which also allows, for instance,
% for changing their color independently of the text.
%
% \begin{macro}{\seyesThickness}
% The default thickness of the rules will be a twentieth of a millimeter,
% which can be changed be redefining the |\seyesThickness| length:
%    \begin{macrocode}
\newlength{\seyesThickness}
\setlength{\seyesThickness}{0.05mm}
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\seyesDefault}
% The default code for changing colors is contained in |\seyesDefault|, which
% is empty by default. One can redefine it for instance to |\color{blue}| to
% make the rules blue.
%    \begin{macrocode}
\newcommand{\seyesDefault}{}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\seyes}
% The main macro thus takes the text as argument and behaves as a box with
% this text in it and the lines behind. The width of the box is the one of the
% text, while its height and depth are the maximal ones in the font. We
% actually take reference characters to define the height of each line, so
% that it works with any font. However the result is strange when not using
% the academic shape of French Cursive.
%    \begin{macrocode}
\newsavebox{\seyes@box}
\newlength{\seyes@ln}
%    \end{macrocode}
%    \begin{macrocode}
\newcommand{\seyes}[2][\seyesDefault]{%
  \mbox{%
    \sbox\seyes@box{#2}%
    #1%
    \raisebox{-0.5\seyesThickness}{\mbox{%
      \rlap{\rule{\wd\seyes@box}{\seyesThickness}}%
      \settoheight\seyes@ln{a}%
      \rlap{\rule[\seyes@ln]{\wd\seyes@box}{\seyesThickness}}%
      \settoheight\seyes@ln{d}%
      \rlap{\rule[\seyes@ln]{\wd\seyes@box}{\seyesThickness}}%
      \settoheight\seyes@ln{b}%
      \rlap{\rule[\seyes@ln]{\wd\seyes@box}{\seyesThickness}}%
      \settodepth\seyes@ln{p}%
      \rlap{\rule[-\seyes@ln]{\wd\seyes@box}{\seyesThickness}}%
      \settodepth\seyes@ln{g}%
      \rlap{\rule[-\seyes@ln]{\wd\seyes@box}{\seyesThickness}}%
    }}%
    \usebox\seyes@box}}
%    \end{macrocode}
% \end{macro}
%
% \Finale