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+%NAME: guitartabs.cls
+%
+% Andrey Babushkin, 2018/05/01
+% babusand@fit.cvut.cz
+%
+% A class allowing to draw guitar tablatures easily.
+%
+% Released under the The LaTeX Project Public License 1.3c.
+
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesClass{guitartabs}[2018/05/01 CTU FIT BI-TEX Guitar Tabs]
+
+% Inherit options of article
+\DeclareOption*{
+ \PassOptionsToClass{\CurrentOption}{article}
+}
+\ProcessOptions\relax
+\LoadClass[10pt, a4paper]{article}
+
+% Proper encoding
+\RequirePackage[utf8]{inputenc}
+
+% Needed to configure page layout
+\RequirePackage{geometry}
+
+% Needed to use \if-\then-\else statement
+\RequirePackage{xifthen}
+
+% Needed for creating graphics
+\RequirePackage{tikz}
+
+% Music notation
+\RequirePackage{musixtex}
+\RequirePackage{harmony}
+
+% Some calculations
+\RequirePackage{intcalc}
+
+%-------------------------------------------------------------------------------
+% Commands for the song information
+%-------------------------------------------------------------------------------
+
+% Define an artist
+\newcommand*{\artistname}[1]{\def\@artistname{#1}}
+
+% Define an album title
+\newcommand*{\albumtitle}[1]{\def\@albumtitle{#1}}
+
+% Define a song name
+\newcommand*{\songname}[1]{\def\@songname{#1}}
+
+%-------------------------------------------------------------------------------
+% Header creation commands
+%-------------------------------------------------------------------------------
+
+\newcommand*{\maketabheader}{
+ \begin{center}
+ \LARGE\rmfamily\bfseries\@songname%
+ \\%
+ \normalsize\rmfamily\bfseries\@artistname%
+ \\%
+ \normalsize\rmfamily\mdseries\@albumtitle%
+ \\%
+ \vspace{4mm}
+ \hrule
+ \vspace{10mm}
+ \end{center}
+}
+
+%-------------------------------------------------------------------------------
+% Counters
+%-------------------------------------------------------------------------------
+
+\newcounter{tabstrings}
+\newcounter{tabbars}
+
+\newcounter{tabcstring}
+\newcounter{tabcbar}
+\newcounter{tabcn}
+\newcounter{tabcdn}
+
+\newcounter{flag}
+
+%-------------------------------------------------------------------------------
+% A tab line environment
+%-------------------------------------------------------------------------------
+
+\newenvironment{tabline}[4]
+{
+
+ %-------------------------------------------------------------------------------
+ % Defining helpers
+ %-------------------------------------------------------------------------------
+
+ \newcommand{\gtuning}{#4}
+ \newcommand{\timesigtop}{#2}
+ \newcommand{\timesigbot}{#3}
+
+ \newcommand{\tabwidth}{
+ \textwidth - 0.6cm
+ }
+ \newcommand{\ypostimetop}{
+ {(\value{tabstrings} - 1) / 4}
+ }
+ \newcommand{\ypostimebot}{
+ {(\value{tabstrings} - 1) / 4 * 3}
+ }
+
+ %-------------------------------------------------------------------------------
+ % Defining symbols
+ %-------------------------------------------------------------------------------
+
+ % Moves cursor to the next bar.
+ %
+ % \nextbar
+ %
+ \newcommand{\nextbar}{
+ \stepcounter{tabcbar}
+ }
+
+ % Draws one note on a current bar.
+ %
+ % \note{numerator}{denominator}{string}{fret}
+ %
+ \newcommand{\note}[4]{
+ \pgfmathsetlengthmacro\xpos{
+ % skipping time sig and tuning
+ 0.8cm
+ % skipping bars
+ + (\textwidth - 1.4cm) / \value{tabbars} * (\value{tabcbar} - 1)
+ % calculating position inside a bar
+ + (\textwidth - 1.4cm) / \value{tabbars} / (##2 + 1) * ##1
+ }
+ \draw node[note] at (##3 - 1,\xpos) {##4};
+ }
+
+ %
+ % The same as \note but draws the length of a note under strings tab.
+ %
+ % \note{numerator}{denominator}{string}{fret}{length}
+ %
+ \newcommand{\notel}[5]{
+ \note{##1}{##2}{##3}{##4}
+ \setcounter{flag}{0}
+ \ifthenelse{\lengthtest{##5 pt = 1pt }}
+ {\note{##1}{##2}{\value{tabstrings} + 1}{\rotatebox{180}{\Ganz}}\setcounter{flag}{1}}{}
+ \ifthenelse{\lengthtest{##5 pt = 2pt }}
+ {\note{##1}{##2}{\value{tabstrings} + 1}{\rotatebox{180}{\Halb}}\setcounter{flag}{1}}{}
+ \ifthenelse{\lengthtest{##5 pt = 4pt }}
+ {\note{##1}{##2}{\value{tabstrings} + 1}{\rotatebox{180}{\Vier}}\setcounter{flag}{1}}{}
+ \ifthenelse{\lengthtest{##5 pt = 8pt }}
+ {\note{##1}{##2}{\value{tabstrings} + 1.3}{\rotatebox{180}{\Acht}}\setcounter{flag}{1}}{}
+ \ifthenelse{\lengthtest{##5 pt = 16pt }}
+ {\note{##1}{##2}{\value{tabstrings} + 1.3}{\rotatebox{180}{\Sech}}\setcounter{flag}{1}}{}
+ \ifthenelse{\lengthtest{##5 pt = 2.5pt }}
+ {\note{##1}{##2}{\value{tabstrings} + 1}{\rotatebox{180}{\Halb}.}\setcounter{flag}{1}}{}
+ \ifthenelse{\lengthtest{##5 pt = 4.5pt }}
+ {\note{##1}{##2}{\value{tabstrings} + 1}{\rotatebox{180}{\Vier}.}\setcounter{flag}{1}}{}
+ \ifthenelse{\lengthtest{##5 pt = 8.5pt }}
+ {\note{##1}{##2}{\value{tabstrings} + 1.3}{\rotatebox{180}{\Acht}.}\setcounter{flag}{1}}{}
+ \ifthenelse{\lengthtest{##5 pt = 16.5pt}}
+ {\note{##1}{##2}{\value{tabstrings} + 1}{\rotatebox{180}{\Sech}.}\setcounter{flag}{1}}{}
+ \ifthenelse{\value{flag} = 0}{\note{##1}{##2}{\value{tabstrings} + 1}{?}}{}
+ }
+
+ %
+ % Draws a whole rest symbol.
+ %
+ % \restwhole{numerator}{denominator}
+ %
+ \newcommand{\restwhole}[2]{
+ \pgfmathsetlengthmacro\xpos{
+ % skipping time sig and tuning
+ 0.8cm
+ % skipping bars
+ + (\textwidth - 1.4cm) / \value{tabbars} * (\value{tabcbar} - 1)
+ % calculating position inside a bar
+ + (\textwidth - 1.4cm) / \value{tabbars} / (##2 + 1) * ##1
+ }
+ \draw node[.style={scale=0.7}] at (\intcalcDiv{\value{tabstrings}}{2} - 1.05,\xpos) {\GaPa};
+ }
+
+ %
+ % Draws a half rest symbol.
+ %
+ % \resthalf{numerator}{denominator}
+ %
+ \newcommand{\resthalf}[2]{
+ \pgfmathsetlengthmacro\xpos{
+ % skipping time sig and tuning
+ 0.8cm
+ % skipping bars
+ + (\textwidth - 1.4cm) / \value{tabbars} * (\value{tabcbar} - 1)
+ % calculating position inside a bar
+ + (\textwidth - 1.4cm) / \value{tabbars} / (##2 + 1) * ##1
+ }
+ \draw node[.style={scale=0.7}] at (\intcalcDiv{\value{tabstrings}}{2} - 0.85,\xpos) {\HaPa};
+ }
+
+ %
+ % Draws a quarter rest symbol.
+ %
+ % \restquarter{numerator}{denominator}
+ %
+ \newcommand{\restquarter}[2]{
+ \note{##1}{##2}{\intcalcDiv{\value{tabstrings}}{2}}{\ViPa}
+ }
+
+ %
+ % Draws a eighth rest symbol.
+ %
+ % \resteigth{numerator}{denominator}
+ %
+ \newcommand{\resteighth}[2]{
+ \note{##1}{##2}{\intcalcDiv{\value{tabstrings}}{2}}{\AcPa}
+ }
+
+ %
+ % Draws a sixteenth rest symbol.
+ %
+ % \restsixteenth{numerator}{denominator}
+ %
+ \newcommand{\restsixteenth}[2]{
+ \note{##1}{##2}{\intcalcDiv{\value{tabstrings}}{2}}{\SePa}
+ }
+
+ %-------------------------------------------------------------------------------
+ % Setting counters
+ %-------------------------------------------------------------------------------
+
+ % Set a number of strings
+ \setcounter{tabstrings}{0}
+ \foreach \tuning in \gtuning {
+ \addtocounter{tabstrings}{1}
+ }
+
+ % Set a number of bars
+ \setcounter{tabbars}{#1}
+
+ % Current bar
+ \setcounter{tabcbar}{1}
+
+ %-------------------------------------------------------------------------------
+ % Drawing
+ %-------------------------------------------------------------------------------
+
+ \begin{center}
+ \begin{tikzpicture}[
+ note/.style={rectangle,fill=white, scale=0.7},
+ cm={0,-0.3,1,0,(0,0)}
+ ]
+
+ \setcounter{tabcstring}{\value{tabstrings}}
+
+ % Drawing tuning labels
+ \foreach \tuning in \gtuning {
+ \node[
+ xshift=-0.3cm,
+ font=\fontsize{0.2cm}{0.1cm}\selectfont
+ ] at (\value{tabcstring}-1,0) {\tuning};
+ \addtocounter{tabcstring}{-1}
+ }
+
+ % Drawing time signatures
+ \node[
+ xshift=0.4cm,
+ font=\fontsize{1cm}{0.1cm}\selectfont\bfseries
+ ] at (\ypostimetop,0) {\timesigtop};
+
+ \node[
+ xshift=0.4cm,
+ font=\fontsize{1cm}{0.1cm}\selectfont\bfseries
+ ] at (\ypostimebot,0) {\timesigbot};
+
+ % Drawing strings
+ \foreach \tline in {1,...,\value{tabstrings}} {
+ \draw (\tline - 1,0) -- (\tline - 1,\tabwidth);
+ }
+
+ % Drawing bars
+ \draw (0,0) -- (\value{tabstrings}-1,0);
+
+ \foreach \tbar in {1,...,\value{tabbars}} {
+ \pgfmathsetlengthmacro\barpos{ (\textwidth - 1.4cm) / \value{tabbars} * \tbar + 0.8cm }
+ \draw (0,\barpos) -- (\value{tabstrings}-1,\barpos);
+ }
+} {
+ \end{tikzpicture}
+\end{center}
+}
+
+%-------------------------------------------------------------------------------
+% Configure layout
+%-------------------------------------------------------------------------------
+\geometry{left=2.0cm, top=1.5cm, right=2.0cm, bottom=1.5cm, footskip=0cm}
+
+