\ProvidesPackage{hetcasl}[2002/10/04 v0.1 LaTeX Package for CASL v1.0.1]
%% $Id$

\NeedsTeXFormat{LaTeX2e}

% Required packages
\RequirePackage{ifthen}
\RequirePackage{tabularx}
\RequirePackage{calc}
\RequirePackage[utf8]{inputenc}
\RequirePackage{xspace}
\RequirePackage{latexsym}

\newcounter{@opentabulars}
\setcounter{@opentabulars}{0}

\newlength{\@oldparindent}
\newlength{\@hetcaslmaxwidth}
\newlength{\@remhetcaslwidth}

\newlength{\@KWwidth}%
% The next two length variables will be used in \KW
\newlength{\@realWidth}\newlength{\@neededWidth}

\newlength{\@EqSpace}
\newlength{\@ABSpace}
\newlength{\@LeftABSpace}
\newlength{\@RightABSpace}

\newif\ifhetcasl \hetcaslfalse

\newenvironment{hetcasl}[1][\textwidth]%
{%begin stuff
\ifhetcasl%
\PackageError{hetcasl evironments cannot nested}%
\else\hetcasltrue\fi%
\begingroup%
\setlength{\@oldparindent}{\the\parindent}%
\setlength{\parindent}{0cm}%
\setlength{\@hetcaslmaxwidth}{#1}%
\setlength{\@remhetcaslwidth}{\the\@hetcaslmaxwidth}%
%\begin{alltt}\begingroup\rmfamily
\begin{tabbing}%
% a little line to set up three useful tabstops for rendering parts
% of a library and or specification
\KW{view} \=\KW{preds} \=~~~~~~~\=\kill
}%
{%end stuff
\end{tabbing}%
%\endgroup\end{alltt}
%\@CloseAllTabulars%
\setlength{\parindent}{\the\@oldparindent}%
\endgroup%
\hetcaslfalse%
}

\newcommand{\@HetCASLPrelude}{% HetCASL-Prelude
\settowidth{\@KWwidth}{\textbf{view}}
%%%% define all the makros needed for typesetting hetCASL
%
% \KW prints a KeyWord within a box that is at least \@KWwidth wide.
% If the keyword needs more space the box is as wide as the kyeword
% is. The optional argument overrides \@KWwidth with the width of the
% mandatory argument in bold face. The mandatory argument is always
% printed in bold face.
\newcommand{\KW}[2][no--format--keyword]%
{\ifthenelse{\equal{##1}{no--format--keyword}}%
{% no optional argument
\settowidth{\@neededWidth}{\textbf{##2}}}%
{% optional argument given
\settowidth{\@realWidth}{\textbf{##2}}%
\settowidth{\@KWwidth}{\textbf{##1}}%
\ifthenelse{\@KWwidth > \@realWidth}%
{\setlength{\@neededWidth}{\@KWwidth}}%
{\setlength{\@neededWidth}{\@realWidth}}}%
\makebox[% set the width of the box not smaller
% than the width of the KeyWord
\@neededWidth]%
[l]{\textbf{##2}}%
}%
% print the first argument as is and use the second argument as label
\newcommand{\HetsLabel}[2]{##1}
% print label for ids
\newcommand{\IdDeclLabel}[2]{##1} %% {##1\label{##2}}
\newcommand{\IdApplLabel}[2]{##1} %% {##1\ref{##2}}
% \SId prints its argument in small caps as a Structured Id for names
% of specifications, views and libraries
\newcommand{\SId}[1]{\textsc{##1}}%
% \SIdIndex prints its argument like \SId but sets an Index Entry if
% redifined
\newcommand{\SIdIndex}[1]{\SId{##1}}%
% \Id prints its argument in italic face as one word, for all other
% identifiers not covered by \SId and only containing letters, numbers
% and \_
\newcommand{\Id}[1]{\textit{##1}}%
% \AX prints its argument in math modus
\newcommand{\Ax}[1]{\ensuremath{##1}}%
% \AltBar prints a | with the space of an = sign
\settowidth{\@EqSpace}{\Ax{=}}
\settowidth{\@ABSpace}{\Ax{|}}
\setlength{\@LeftABSpace}{(\@EqSpace - \@ABSpace) *1/2}
\setlength{\@RightABSpace}{\@EqSpace - \@ABSpace - \@LeftABSpace}
\newcommand{\AltBar}{\hspace*{\@LeftABSpace}\Ax{|}\hspace*{\@RightABSpace}}

\newcommand{\ANNOTEWORD}[1]{{\small{}\KW{\%##1}}}

%%%%% Heng todo:
%% Makros aus casl.sty definieren
\newcommand{\LBRACE}            {\{}
\newcommand{\RBRACE}            {\}}
\newcommand{\FREE}              {\KW{free}\xspace} %plain_keyword
\newcommand{\FREELBRACE}        {\FREE~\LBRACE}
\newcommand{\GENERATED}         {\KW{generated}\xspace}
% \newcommand{\TYPE}              {\KW{type}}
% \newcommand{\TYPES}             {\KW{types}}
\newcommand{\FREETYPE}          {\FREE~\TYPE\xspace}
\newcommand{\FREETYPES}         {\FREE~\TYPES\xspace}
\newcommand{\GENERATEDTYPE}     {\GENERATED~\TYPE\xspace} %{\KW{generated~type}}
\newcommand{\GENERATEDTYPES}    {\GENERATED~\TYPES\xspace}

\newcommand{\VAR}               {\KW[preds]{var}\xspace}
\newcommand{\VARS}              {\KW[preds]{vars}\xspace}
\newcommand{\AXIOM}             {\KW{axiom}\xspace}
\newcommand{\AXIOMS}            {\KW{axioms}\xspace}

\newcommand{\HIDE}              {\KW{hide}\xspace}
\newcommand{\REVEAL}            {\KW{reveal}\xspace}
\newcommand{\WITH}              {\KW{with}\xspace}
\newcommand{\THEN}              {\KW[view]{then}\xspace} % hetcasl_keyword
\newcommand{\THENCONS}          {\THEN~\ANNOTEWORD{cons}\xspace}
\newcommand{\THENDEF}           {\THEN~\ANNOTEWORD{def}\xspace}
\newcommand{\THENIMPLIES}       {\THEN~\ANNOTEWORD{implies}\xspace}
\newcommand{\THENMONO}          {\THEN~\ANNOTEWORD{mono}\xspace}
\newcommand{\AND}               {\KW[view]{and}\xspace}
\newcommand{\LOCAL}             {\KW{local}\xspace}
\newcommand{\THENLOCAL}         {\THEN~\LOCAL}
\newcommand{\WITHIN}            {\KW{within}\xspace}
\newcommand{\CLOSED}            {\KW{closed}\xspace}
\newcommand{\FIT}               {\KW{fit}\xspace}
\newcommand{\TO}                {\KW{to}\xspace}
\newcommand{\LOGIC}             {\KW{logic}\xspace}

\newcommand{\SPEC}              {\KW[view]{spec}\xspace}
\newcommand{\VIEW}              {\KW[view]{view}\xspace}
\newcommand{\END}               {\KW{end}\xspace}

\newcommand{\ARCH}              {\KW{arch}\xspace}
\newcommand{\ARCHSPEC}          {\ARCH~\KW{spec}\xspace}
\newcommand{\UNITSPEC}          {\KW{unit}~\KW{spec}\xspace}
\newcommand{\UNITS}             {\KW{units}\xspace}
\newcommand{\GIVEN}             {\KW{given}\xspace}
\newcommand{\RESULT}            {\KW{result}\xspace}

\newcommand{\LIBRARY}           {\KW{library}\xspace}
\newcommand{\FROM}              {\KW[view]{from}\xspace}
\newcommand{\GET}               {\KW{get}\xspace}
\newcommand{\VERSION}           {\KW{version}\xspace}

\newcommand{\PROD}              {\Ax{\times}}
\newcommand{\TOTAL}             {\Ax{\rightarrow}}
\newcommand{\PARTIAL}           {\Ax{\rightarrow}}
\newcommand{\MAPSTO}            {\Ax{\mapsto}}

\newcommand{\ASSOC}             {\Id{assoc}}
\newcommand{\COMM}              {\Id{comm}}
\newcommand{\IDEM}              {\Id{idem}}
\newcommand{\UNIT}              {\Id{unit}\xspace}

\newcommand{\EXISTS}            {\Ax{\exists}}
\newcommand{\EXISTSUNIQUE}      {\AX{\exists!}}
\newcommand{\IMPLIES}           {\Ax{\Rightarrow}}
\newcommand{\IFF}               {\Ax{\Leftrightarrow}}
\newcommand{\EEQ}               {\Ax{\stackrel{e}{=}}}
\newcommand{\A}                 {\Ax{\wedge}}
\newcommand{\V}                 {\Ax{\vee}}
\newcommand{\IN}                {\Ax{\in}}
\newcommand{\NOT}               {\Ax{\neg}}
\newcommand{\FORALL}            {\Ax{\forall}}
\newcommand{\BULLET}            {\Ax{\;\bullet\;}}

\newcommand{\IF}                {\Id{if}\xspace}
\newcommand{\WHEN}              {\Id{when}\xspace}
\newcommand{\ELSE}              {\Id{else}\xspace}
\newcommand{\DEF}               {\Id{def}\xspace}
\newcommand{\AS}                {\Id{as}\xspace}
\newcommand{\TRUE}              {\Id{true}\xspace}
\newcommand{\FALSE}             {\Id{false}\xspace}

%%%% SORT, OP, PRED : drei Varianten   %% Type auch
\newcommand{\KWC}[2][preds]{%
\ifthenelse{\equal{##1}{KW}}%
{%KW as parameter
\KW{##2}}%
{% else to KW as parameter
\ifthenelse{\equal{##1}{ID}}%
{%ID as parameter
\Id{##2}}
{% else to ID as parameter
\KW[preds]{##2}}}%
}%% end of KWC definition
\newcommand{\SORT}[1][preds]{\KWC[##1]{sort}\xspace}
\newcommand{\SORTS}[1][preds]{\KWC[##1]{sorts}\xspace}
\newcommand{\ESORT}[1][preds]{\KWC[##1]{esort}\xspace}
\newcommand{\ESORTS}[1][preds]{\KWC[##1]{esorts}\xspace}
\newcommand{\OP}[1][preds]{\KWC[##1]{op}\xspace}
\newcommand{\OPS}[1][preds]{\KWC[##1]{ops}\xspace}
\newcommand{\PRED}[1][preds]{\KWC[##1]{pred}\xspace}
\newcommand{\PREDS}[1][preds]{\KWC[##1]{preds}\xspace}
\newcommand{\TYPE}[1][preds]{\KWC[##1]{type}\xspace}
\newcommand{\TYPES}[1][preds]{\KWC[##1]{types}\xspace}
\newcommand{\ETYPE}[1][preds]{\KWC[##1]{etype}\xspace}
\newcommand{\ETYPES}[1][preds]{\KWC[##1]{etypes}\xspace}
\newcommand{\CLASS}[1][preds]{\KWC[##1]{class}\xspace}
\newcommand{\CLASSES}[1][preds]{\KWC[##1]{classes}\xspace}
\newcommand{\FUN}[1][preds]{\KWC[##1]{fun}\xspace}
\newcommand{\FUNS}[1][preds]{\KWC[##1]{funs}\xspace}

%% 1. mit \KWC[preds]{} default
%% 2. mit \KWC[KW]{}
%% 3. mit \KWC[ID]{}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% starting a library
\newcommand{\library}[1]{\KW{library}\ \SId{##1}\ }
% printing a version number
%\newcommand{\version}[1]{\KW{version}\ ##1}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% comments, annotations and labels
\newcommand{\commentline}[1]{\textbf{\%\%}{\small##1}}
%
\newenvironment{commentgroup}%
{\textbf{\%\{}\begingroup\small}%
{\endgroup\textbf{\}\%}}%
%
\newcommand{\annoteline}[2]{\textbf{\%##1}\ {\small \(##2\)}}%
%
\newenvironment{annotegroup}[1]%
{\textbf{\%##1(}\begingroup\small}%
{\endgroup\textbf{)\%}}%
%
\newcommand{\casllabel}[1]{\textbf{\%(}{\small##1}\textbf{)\%}}%
%
\newenvironment{mlabel}%
{\textbf{\%(}\begingroup\small}%
{\endgroup\textbf{)\%}}%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
\newcommand{\place}{\_\_}%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% download items (from, get are automatically printed)
\newenvironment{downloaditem}[1]%
{\begingroup\sc
\textnormal{\textbf{from}}\ ##1\ %
%\textnormal{\ifthenelse{\equal{##1}{no-version}}{}{\version{##1}\ }}%
\textnormal{\textbf{get}}}%
{\endgroup}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% specifications
% specdefn starts a new spec defn
% arguments: ##1 ::= opt. semantic-anno
%            ##2 ::= spec name
%            ##3 ::= parameters (see parameterspecs-env)
%            ##4 ::= imports (see importspecs-env)
\newenvironment{specdefn}[4][no-semantic-anno]%
{\textbf{spec}\ \textsc{##2}%
\ifthenelse{\equal{##3}{}}{}{##3}%
\ \(=\)%
}%
{}
% end of \@HetCASLPrelude
}
\@HetCASLPrelude%
%% helpers
% calculate a new width based on \@remhetcaslwidth and the fixed width
% given as argument.
\newcommand{\@calc@width}[1]{}
%\newcommand{\@tabnewline}{\\&}

\newcommand{\@condEOL}{\ifthenelse{\the@opentabulars=0}{\\}{\@tabnewline}}

\newcommand{\@CloseAllTabulars}{}