proofmood.sty

%% proofmood.sty
%  http://www.proofmood.com (version 1.02 - Jul 06, 2011)

\RequirePackage{array,latexsym,amsmath,amsfonts,amssymb,ifthen}
\RequirePackage[svgnames]{xcolor}

\newenvironment{fitchproof}%
	{\small\renewcommand{\arraystretch}{0.5}\setlength{\arraycolsep}{0.15em}%
		\(\begin{array}{rlrll}}{\end{array}\)}

% In many commands, the prefix "pm" stands for ProofMood.

% left border
\newcommand{\pmnl}{\rule{0ex}{2.5ex}\\[0.2ex]}   
%^ next line. This is used for most lines.
\newcommand{\pmvert}{\vline\hspace*{0.5em}}      % VERT │
\newcommand{\pmproves}{\vline\raisebox{0.2ex}% 
	{\rule{1.5em}{\arrayrulewidth}}} % ├─
%^ In this case, \\ is used instead of \pmnl
% Right after a subproof, we always add a line as follows
% (to give some vertical spacing)
% & \pmvert * level & & & \\

\newcommand{\pnumb}[1]{#1.\;}
%^ \pnumb is a macro for the line number
\newcommand{\pform}[1]{#1\hspace*{1.5em}}
%^ \pform is a macro for suffixing a formula with a space
\newcommand{\pforms}[1]{#1\hspace*{0.8em}}
%^ \pforms is a macro for suffixing a formula with a small space

% Followings are check symbols.
\newcommand{\chknull}{\makebox[3.0mm]{}} % empty box
% Blue checkmark
\newcommand{\chkch}{\textcolor{SteelBlue}{\text{\scriptsize\checkmark}}\;}
% Red x
\newcommand{\chkx}{\textcolor{Crimson}{\msf{x}\:}\;}
% Gray x
\newcommand{\chkxg}{\textcolor{DimGray}{\text{\textsf{x}}}\mskip9mu}

% Connectives
\newcommand{\pmbot}{\bot}
\newcommand{\pmnot}{\neg}
\newcommand{\pmand}{\wedge}
\newcommand{\pmor}{\vee}
\newcommand{\pmimp}{\rightarrow}
\newcommand{\pmiff}{\leftrightarrow}
% Rule of inference
\newcommand{\infrul}[1]{\textcolor{DimGray}{\msf{#1}\hspace*{0.2em}}}
%^ \infrul is a macro for an inference rule when the rule consists
%^ of one word, e.g., repeat, LEM, hyp
\newcommand{\infrule}[2]{\textcolor{DimGray}{\makebox[4mm][c]{$#1$}}%
	\textcolor{DimGray}{\msf{#2}\hspace*{0.2em}}}
%^ \infrule is a macro for an inference rule when the rule consists 
%^ of two words, e.g., imp elem, and intro etc.
% Premise '8', '8-12' etc.
\newcommand{\infruleErr}[1]{\textcolor{Tomato}{\msf{#1}\hspace*{0.2em}}}
\newcommand{\pmprem}[1]{\textcolor{DimGray}{\texttt{#1}}}

\DeclareMathAlphabet{\msf}{OT1}{cmss}{m}{n}
\newcommand{\pmusc}{\mskip-1mu\_\mskip.3mu} % underscore symbol
\newcommand{\qv}[2]{#1\msf{#2}\mskip4mu{}}
\newcommand{\qvs}[2]{#1\msf{#2}\mskip2mu{}}