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%<*readme>
----------------------------------------------------------------
nevelok --- LaTeX package for automatic definite articles for Hungarian
Author:  Zalan Bodo
E-mail:  zbodo@cs.ubbcluj.ro
License: Released under the LaTeX Project Public License v1.3c or later
See:     http://www.latex-project.org/lppl.txt
----------------------------------------------------------------

LaTeX package for automatic definite articles for Hungarian
%</readme>
%<*internal>
\fi
\def\nameofplainTeX{plain}
\ifx\fmtname\nameofplainTeX\else
  \expandafter\begingroup
\fi
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%<*install>
\input docstrip.tex
\keepsilent
\askforoverwritefalse
\preamble
----------------------------------------------------------------
nevelok --- LaTeX package for automatic definite articles for Hungarian
Author:  Zalan Bodo
E-mail:  zbodo@cs.ubbcluj.ro
License: Released under the LaTeX Project Public License v1.3c or later
See:     http://www.latex-project.org/lppl.txt
----------------------------------------------------------------

\endpreamble
\postamble

Copyright (C) 2015 by Zalan Bodo <zbodo@cs.ubbcluj.ro>

This work may be distributed and/or modified under the
conditions of the LaTeX Project Public License (LPPL), either
version 1.3c of this license or (at your option) any later
version.  The latest version of this license is in the file:

http://www.latex-project.org/lppl.txt

This work is "maintained" (as per LPPL maintenance status) by
Zalan Bodo.

This work consists of the file nevelok.dtx and a Makefile.
Running make generates the derived files README.txt, nevelok.pdf and nevelok.sty.
Running make inst installs the files in the user's TeX tree.
Running make install installs the files in the local TeX tree.

\endpostamble

\usedir{tex/latex/nevelok}
\generate{
  \file{\jobname.sty}{\from{\jobname.dtx}{package}}
}
%</install>
%<install>\endbatchfile
%<*internal>
\usedir{source/latex/nevelok}
\generate{
  \file{\jobname.ins}{\from{\jobname.dtx}{install}}
}
\nopreamble\nopostamble
\usedir{doc/latex/nevelok}
\generate{
  \file{README.txt}{\from{\jobname.dtx}{readme}}
}
\ifx\fmtname\nameofplainTeX
  \expandafter\endbatchfile
\else
  \expandafter\endgroup
\fi
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% \fi
%
% \iffalse
%<*driver>
\ProvidesFile{nevelok.dtx}
%</driver>
%<package>\NeedsTeXFormat{LaTeX2e}[1999/12/01]
%<package>\ProvidesPackage{nevelok}
%<*package>
    [2015/09/10 v1.00 LaTeX package for automatic definite articles for Hungarian]
%</package>
%<package>\RequirePackage{xstring}
%<*driver>
\documentclass{ltxdoc}
\usepackage[a4paper,margin=25mm,left=50mm,nohead]{geometry}
\usepackage[numbered]{hypdoc}
\usepackage{\jobname}
%\EnableCrossrefs
%\CodelineIndex
\RecordChanges
\newtheorem{example}{Example}[section]
\begin{document}
  \sloppy
  \DocInput{\jobname.dtx}
\end{document}
%</driver>
% \fi
%
% \GetFileInfo{\jobname.dtx}
% \DoNotIndex{\newcommand,\newenvironment}
%
%\title{\textsf{nevelok} --- \LaTeX{} package for automatic definite articles for Hungarian\thanks{This file 
%   describes version \fileversion, last revised \filedate.}
%}
%\author{Zal\'an Bod\'o\thanks{E-mail: zbodo@cs.ubbcluj.ro}}
%\date{Released \filedate}
%
%\maketitle
%
%\changes{v1.00}{2015/09/10}{First public release}
%
% \begin{abstract}
% \LaTeX{} package for automatic definite articles for Hungarian.
% \end{abstract}
%
%\section{Introduction}
%
% In Hungarian, the definite articles ``a'' and ``az'' are determined by the
% pronounciation of the subsequent word. If the first phoneme of the pronounced word
% is a vowel, then the article is ``az'', otherwise ``az'' must be used. 
% The simple commands help the \LaTeX{} user to automatically adjust the
% definite article according to chapter, equation, page, etc. number.
%
% \section{Usage}
%
% \DescribeMacro{\aaz}
% \DescribeMacro{\Aaz}
% The \textsf{nevelok} package provides the following commands: \cmd{\aaz}\marg{reference}
% and \cmd{\Aaz}\marg{reference},
% where {\em reference} is a reference to a labeled \LaTeX{} object (section, equation, figure, etc.).
% The difference stands in letter casing: the \cmd{\aaz} is the lower case command
% producing ``a'' and ``az'', while \cmd{\Aaz} is the upper case version, producing
% ``A'' and ``Az'' for the beginning of a sentence.
% The commands also work if the reference is put in round parantheses.
%
% \textsf{Note}: The commands work only with the simple, built-in references 
% \cmd{\ref} and \cmd{\pageref}. It does not work with the popular \cmd{\eqref}
% command of \textsf{amsmath} package, but the same effect can be achieved by enclosing the
% reference in round parantheses.
%
% \textsf{Requirements}: The package requires/uses the \textsf{xstring} package.
%
%\StopEventually{^^A
%  \PrintChanges
%}
%
% \section{Implementation}
%
% \begin{macro}{\aaz}
% The \cmd{\aaz} command outputs ``a'' or ``az'', depending on the argument.
% To be used inside the sentence.
%    \begin{macrocode}
%%
\newcommand{\aaz}[1]{%
  \z@aaz{#1}{a}{az}{(}{)}%
}
%%
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\Aaz}
% The \cmd{\Aaz} command outputs ``A'' or ``Az'', depending on the argument.
% To be used when starting a new sentence.
%    \begin{macrocode}
%%
\newcommand{\Aaz}[1]{%
  \z@aaz{#1}{A}{Az}{(}{)}%
}
%%
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\z@aaz}
% The main command of the package, used by the two provided commands:
% \cmd{\z@aaz}\marg{reference}\marg{art1}\marg{art2}\marg{sym1}\marg{sym2}.
% The {\em art1} and {\em art2} parameters stand for the definite articles used in case of
% consonants and vowels, respectively. Parameters {\em art1} and {\em art2} are used to 
% handle cases when the reference is put between some symbols, e.g. ``('' and ``)''.
% The $4$th parameter is sought for at the beginning of the reference, and if found,
% the substring between the $4$th and $5$th parameter values is analyzed, instead of the whole
% reference.
%    \begin{macrocode}
%%
\newcommand{\z@aaz}[5]{%
  \def\param{#1}% the first (reference) parameter
  \def\kezd{}\relax% the symbols to be put before the output
  \def\veg{}\relax% the symbols to be put after the output
  \IfBeginWith{\param}{#4}{% if starts with round parantheses, 
                           % we remove it from both sides; 
                           % the parameter changes
    \StrPosition{\param}{#5}[\vegz]%
    \newcount\ind%
    \ind = \vegz%
    \advance \ind by -1%
    \StrMid{\param}{2}{\ind}[\param]%
    \def\kezd{#4}%
    \def\veg{#5}%
  }{}\relax%
  \IfBeginWith{\param}{1}{% if the reference starts with 1, 
                          % special care is required
    \StrLen{\param}[\hossz]%
    \newcount\ind% 
    \newcount\vege%
    \ind = \hossz%
    \vege = 0%
    \loop% loops while it does not find a digit at the end 
         % (in \ref-s, strangely, an \hbox {} appears at the end; 
         % this loop was actually written to remove these)
      \StrChar{\param}{\ind}[\kar]%
      \IfSubStr{1234567890}{\kar}{\vege=1}{}\relax%
      \ifnum \vege = 0%
        \advance \ind by -1%
    \repeat%
    \StrLeft{\param}{\ind}[\paramuj]% \paramuj will contain the 
                                    % ``cleaned'' parameter
    \StrPosition[1]{\paramuj}{.}[\elsopontpozicioja]%
    \StrLen{\paramuj}[\hossz]%
    \newcount\eppme% position of the first dot minus 1
    \eppme = \elsopontpozicioja%
    \advance \eppme by -1%
    \ifnum \elsopontpozicioja = 0%
      \StrLeft{\paramuj}{\hossz}[\prefix]%
    \else%
      \StrLeft{\paramuj}{\eppme}[\prefix]%
    \fi%
    \StrLen{\prefix}[\elsohossz]%
    \ifnum \elsohossz = 1% 1
      #3%
    \else\ifnum \elsohossz = 2% 10
      #2%
    \else\ifnum \elsohossz = 3% 100
      #2%
    \else\ifnum \elsohossz = 4% 1000
      #3%
    \fi\fi\fi\fi%
  }{%
    \StrChar{\param}{1}[\kar]%
    \newcount\az%
    \az = 0%
    \IfSubStr{2346789}{\kar}{% digits that require ``a''; 
                             % this is redundant, but was kept for some reasons
      \az = 0%
    }{%
      \IfSubStr{5AEIOUFLMNRSaeiouflmnrs}{\kar}{% digits and letters 
                                               % that require ``az''
        \az = 1%
      }{%
        \az = 0%
      }\relax%
    }\relax%
    \ifnum \az = 1%
      #3%
    \else%
      #2%
    \fi%
  }%
  \ \kezd\param\veg%
}
%%
%    \end{macrocode}
% \end{macro}
%
%\Finale
\endinput