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% File: classlist.sty
% Version: 2005/06/19 v1.1
% Author: Heiko Oberdiek
% Email: <oberdiek@uni-freiburg.de>
%
% Copyright: Copyright (C) 2005 Heiko Oberdiek.
%
% 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 "maintained".
%
% This Current Maintainer of this work is Heiko Oberdiek.
%
% Function: This package records the loaded classes and stores
% them in a list.
%
% Background: This packages is an answer of a newsgroup question:
% Newsgroup: comp.text.tex
% Subject: Finding the Document Class
% From: Herber Schulz <>
% Date: 18 Jun 2005 13:16:49 -0500
% Message-ID:
% <herbs-D55DB9.13170418062005@news.isp.giganews.com>
%
% Use: Load this package before \documentclass:
% \RequirePackage{classlist}
% \documentclass[some,options]{whatever}
%
% If used after \documentclass, \@filelist is
% parsed for classes. The additional data
% specified options and requested version is no
% longer available here.
%
% \MainClass contains the first loaded class.
% \ClassList stores the class entries, eg.
% \ClassList -> \ClassListEntry{myarticle}{a4paper}{}
% \ClassListEntry{article}{}{}
% \ClassListEntry has three arguments:
% #1: class name
% #2: options given in \documentclass/\LoadClass
% #3: requested version, not the version of class
% \PrintClassList prints the list on screen it can be
% configured by
% \PrintClassListTitle for the title and
% \PrintClassListEntry for formatting the entries.
%
% History:
% 2005/06/19 v1.0:
% * first published version
% (comp.text.tex, CTAN).
% 2005/06/19 v1.1:
% * After \documentclass the package looks
% at \@filelist instead of aborting with error.
%
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{classlist}%
[2005/06/19 v1.0 Record loaded classes (HO)]
\let\ClassList\@empty
\let\MainClassName\relax
\ifx\@classoptionslist\relax
% before \documentclass
\let\CL@org@fileswith@pti@ns\@fileswith@pti@ns
\def\@fileswith@pti@ns#1[#2]#3[#4]{%
% #1: \@clsextension
% #2: options of \documentclass/\LoadClass
% #3: class name
% #4: requested version
\ifx#1\@clsextension
\@ifl@aded#1{#3}{%
\PackageInfo{classlist}{%
Skipping class `#3', because\MessageBreak
this class is already loaded%
}%
}{%
\@ifundefined{MainClassName}{%
\def\MainClassName{#3}%
}{}%
\@temptokena\expandafter{%
\ClassList
\ClassListEntry{#3}{#2}{#4}%
}%
\edef\ClassList{\the\@temptokena}%
}%
\fi
\CL@org@fileswith@pti@ns{#1}[{#2}]{#3}[{#4}]%
}
\else
% after \documentclass
\PackageInfo{classlist}{Use \string\@filelist\space method}%
\let\ClassListEntry\relax
\expandafter\def\expandafter\CL@test
\expandafter#\expandafter1\@clsextension#2\@nil{%
\ifx\\#2\\%
% name does not contain \@clsextension
\else
\expandafter\CL@test@i\CL@entry\@nil
\fi
}%
\expandafter\def\expandafter\CL@test@i
\expandafter#\expandafter1\@clsextension#2\@nil{%
\ifx\\#2\\%
\@ifundefined{opt@\CL@entry}{%
}{%
\@ifundefined{MainClassName}{%
\let\MainClassName\CL@entry
}{%
}%
\edef\ClassList{%
\ClassList
\ClassListEntry{\CL@entry}{}{}%
}%
}%
\else
% names with more than one \@clsextension are not supported.
\fi
}
\@for\CL@entry:=\@filelist\do{%
\expandafter\expandafter\expandafter\CL@test\expandafter
\CL@entry\@clsextension\@nil
}%
\fi
\providecommand*{\PrintClassListEntry}[3]{%
\toks@{* #1}%
\typeout{\the\toks@}%
}
\providecommand*{\PrintClassListTitle}{%
\typeout{Class list:}%
}
\providecommand*{\PrintClassList}{%
\begingroup
\let\ClassListEntry\PrintClassListEntry
\PrintClassListTitle
\ClassList
\endgroup
}
\def\CL@InfoEntry#1#2#3{%
\advance\count@ by \@ne
\def\x{#2}%
\@onelevel@sanitize\x
\edef\CL@Info{%
\CL@Info
\noexpand\MessageBreak
(\the\count@) %
#1 [\x]%
\ifx\\#3\\%
\else
\space[#3]%
\fi
}%
}
\AtBeginDocument{%
\begingroup
\count@=\z@
\def\CL@Info{Class List:}%
\let\ClassListEntry\CL@InfoEntry
\ClassList
\let\on@line\@empty
\PackageInfo{classlist}{\CL@Info}
\endgroup
}
\endinput
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