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%%
%% This is file `logicproof.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% logicproof.dtx (with options: `package')
%%
%% This is a generated file.
%%
%% Copyright (C) 2014 by Alan Davidson
%% This file 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 2005/12/01 or later.
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{logicproof}[2014/03/20 v1.0 Box proofs for propositional logic]
\RequirePackage{array}
\RequirePackage{ifthen}
\newlength{\subproofhorizspace}
\setlength{\subproofhorizspace}{0.5em}
\newlength{\intersubproofvertspace}
\setlength{\intersubproofvertspace}{0.333em}
\newcounter{lp@line}% Current line number on the proof
\newcounter{lp@nested}% Number of nested subproofs we're currently in
\newcounter{lp@total@nests}% Maximum number of nested subproofs allowed
\newcounter{lp@cline@1}% Used to draw horizontal lines in subproofs
\newcounter{lp@cline@2}% Also used to draw horizontal lines in subproofs
\newcounter{lp@temp}% Temporary storage counter
\newenvironment{logicproof}[1]{%
\setcounter{lp@line}{0}%
\setcounter{lp@nested}{0}%
\setcounter{lp@total@nests}{#1}%
\setlength{\tabcolsep}{0mm}%
\let\lp@orig@arraycr\@arraycr%
\renewcommand{\@arraycr}{\lp@cr}%
\renewcommand{\@currentlabel}{\p@lp@line\thelp@line}%
\ifthenelse{%
0=#1%
}{%
\def\lp@tab@format{{r@{~~~}>{$}l<{$}@{~~~~}l}}%
}{%
\def\lp@tab@format%
{{r@{~~~}*{#1}{l}@{~}>{$}l<{$}@{~~~~}l@{~}*{#1}{r}}}
}%
\center%
\expandafter\tabular\lp@tab@format%
\lp@start@proof@line%
}{%
\lp@stop@proof@line%
\endtabular%
\endcenter%
\setcounter{lp@total@nests}{0}%
\ifthenelse{%
0=\value{lp@nested}
}{% All is well.
}{% There are still open subproofs.
\def\@currenvir{subproof}%
}
}
\newenvironment{subproof}{%
\ifthenelse{%
\value{lp@total@nests}>\value{lp@nested}%
}{% All is well; don't do anything.
}{%
\PackageError{logicproof}{Too many nested subproofs!}{%
Increase the maximum number of nested subproofs allowed
in the current logicproof environment.%
}%
}%
\endgroup%
\lp@stop@proof@line%
\lp@orig@arraycr%
\lp@add@space%
\lp@go@up@a@line%
\stepcounter{lp@nested}%
\lp@cr@clines%
&%
\lp@continue@proof@line%
}{%
\ifthenelse{%
0<\value{lp@nested}%
}{% All is well; don't do anything.
}{%
\PackageError{logicproof}{Cannot end a subproof before it begins}{%
You must have a \protect\begin{subproof} before you can use %
\protect\end{subproof}.%
}%
}%
\lp@stop@proof@line%
\lp@cr@clines%
\addtocounter{lp@nested}{-1}%
\lp@extend@space%
\lp@start@proof@line%
\begingroup%
\def\@currenvir{subproof}%
}
\newcommand{\lp@cr}{%
\lp@stop@proof@line%
\lp@orig@arraycr%
\lp@extend@space%
\lp@start@proof@line%
}
\newcommand{\lp@go@up@a@line}{%
\vspace{-\ht\@arstrutbox}%
\vspace{-\dp\@arstrutbox}%
\vspace{-\intersubproofvertspace}%
}
\newcommand{\lp@add@space}{%
\lp@extend@space%
\vspace{-\ht\@arstrutbox}%
\vspace{-\dp\@arstrutbox}%
%\vspace{-\intersubproofvertspace}%
}
\newcommand{\lp@extend@space}{%
\vspace{-\ht\@arstrutbox}%
\vspace{-\dp\@arstrutbox}%
\vspace{\intersubproofvertspace}%
&%
\lp@continue@proof@line%
&%
\lp@stop@proof@line%
\lp@orig@arraycr%
}
\newcommand{\lp@amper}{&}
\newcommand{\lp@start@proof@line}{%
\stepcounter{lp@line}%
\arabic{lp@line}.%
&%
\lp@continue@proof@line%
}
\newcommand{\lp@continue@proof@line}{%
\setcounter{lp@temp}{0}%
\whiledo{\value{lp@temp}<\value{lp@nested}}{%
\vline%
\hspace*{\subproofhorizspace}%
\lp@amper%
\stepcounter{lp@temp}%
}%
\whiledo{\value{lp@temp}<\value{lp@total@nests}}{%
\hspace*{\subproofhorizspace}%
\lp@amper%
\stepcounter{lp@temp}%
}%
}
\newcommand{\lp@stop@proof@line}{%
\whiledo{\value{lp@temp}>\value{lp@nested}}{%
\addtocounter{lp@temp}{-1}%
\lp@amper%
\hspace*{\subproofhorizspace}%
}%
\whiledo{\value{lp@temp}>0}{%
\addtocounter{lp@temp}{-1}%
\lp@amper%
\hspace*{\subproofhorizspace}%
\vline%
}%
}
\newcommand{\lp@subtract@from@counter}[2]{%
\addtocounter{#2}{-#1}%
}
\newcommand{\lp@set@clines}{%
\setcounter{lp@cline@1}{\value{lp@nested}}%
\stepcounter{lp@cline@1}%
\setcounter{lp@cline@2}{\value{lp@total@nests}}%
\addtocounter{lp@cline@2}{\value{lp@total@nests}}%
\addtocounter{lp@cline@2}{4}%
\expandafter\lp@subtract@from@counter\expandafter{%
\value{lp@nested}}{lp@cline@2}%
}
\newcommand{\lp@cr@clines}{%
\lp@set@clines%
\lp@orig@arraycr%
\cline{\value{lp@cline@1}-\value{lp@cline@2}}%
}
\endinput
%%
%% End of file `logicproof.sty'.
|
