% \iffalse meta-comment
% Copyright (C) 2005 Gianluca Pignalberi
% (g.pignalberi@freesoftwaremagazine.com)
%
% this file  may be distributed and/or modified under the conditions of the
% LaTeX Project Public License, either version 1.3a or
% (at your option) any later version. The latest version of this
% license is in http://www.latex-project.org/lppl.txt
% and version 1.3a or later is part of all distributions of LaTeX
% version 2004/10/01 or later.
% \fi
%
% \iffalse
%<package>\NeedsTeXFormat{LaTeX2e}[1999/12/01]
%<package>\ProvidesPackage{cclicenses}
%<package>[2005/05/20 v0.4 .dtx cclicenses file]
%<*driver>
\documentclass{ltxdoc}
\usepackage{cclicenses}
\usepackage{mflogo}
\usepackage{booktabs}
%
\begin{document}
%  \OnlyDescription% Comment out to print Section "The Code" as well.
  \DocInput{cclicenses.dtx}
\end{document}
%</driver>
% \fi
% \CheckSum{283}
% \newcommand\CC{Creative Commons}
%
% \RecordChanges
% \changes{v0.4}{2005/05/20}{Initial version}
%
%  \GetFileInfo{cclicenses.sty}
%  \title{The \textsf{cclicenses} package}
%  \author{Gianluca Pignalberi\\
%          \texttt{g.pignalberi@freesoftwaremagazine.com}}
%  \date{\filedate ~(\fileversion)}
%  \maketitle
% \begin{abstract}
% The version 0.4 of \texttt{cclicenses} is my very first attempt to write a
% package to submit to CTAN. It is intended for typesetting the \CC\
% licenses icons, using \LaTeX\ instead of defining new strokes by \MF.
% \end{abstract}
%
% \section{Introduction}
% Some journal and magazines started publishing articles released under free
% licenses, such as \CC. To show this fact immediately they want to insert the
%  proper logos
% along with the articles. Artists who release music, images or other
% work under \CC may want to add the proper icons to their documents as well.
%
% Some of these magazines, including the one I work for, are typeset by
% \LaTeX. So, I believe there's a need to instruct \LaTeX\ to typeset such
% logos.
%
% This is my very first attempt.
% All of the icons are typeset in boldface Helvetica. I used |\textcircled{}|
% to surround symbols by a circle. For some reason, the circle is not quite a
% circle when the text is very small or it's |\textbf|'ed.
%
% As I said, this is only my first attempt. Please do send me your suggestions
% to improve the result.
%
% \section{How to use the package's commands}
% It coulnd't be easier: according to the license you're going to release
% your work under, use the corresponding logos.
%
% \begin{table*}[h]
% \centering
% \caption{What command generates what icon}
% \begin{tabular}{lcl}
% \toprule
% \textbf{Command}&\textbf{Icon}&\textbf{License's type}\\
% \midrule
% |\cc|&\cc&Creative Commons\\
% |\ccby|&\ccby&Attribution\\
% |\ccnc|&\ccnc&NonCommercial\\
% |\ccnd|&\ccnd&NoDerivs\\
% |\ccsa|&\ccsa&Share-alike\\
% \bottomrule
% \end{tabular}
% \end{table*}
%
% \section{\CC\ licenses}
% When an artist wants to release his or her work under a free license, s/he
% can choose to adopt one of the \CC\ licenses.
%
% The CC licenses are used to reserve some rights to the author, give away
% some other rights, while the copyright is still held by the author.
%
% Since version 2.0, each license includes the \emph{Attribution} right which
% forces every person (who is not the author) to give the original author
% credit.
%
% A \emph{NoDerivs} icon, where ``NoDerivs'' stands for ``Non derivative
% works'', indicates that you may not alter, transform, or build upon a work;
% the \emph{NonCommercial} icon indicates that the work can't be used for
% commercial purposes. The \emph{Share-alike} icon, that applies only to
% derivative works ---so it can't appear along with the NoDerivs icon---, 
% forces to release the derivative works under the same license as the 
% original.
%
% \section{The current licenses}
% The following are the currently used licenses and the related commands:
%
% \begin{center}
% \begin{tabular}{lll}
% \toprule
% \textbf{Command}&\textbf{License}&\textbf{Symbol(s)}\\
% \midrule
% \multicolumn{3}{c}{Version 2.0}\\
% \midrule
% |\by|&Attribution&\by\\
% |\bynd|&Attribution-NoDerivs&\bynd\\
% |\byncnd|&Attribution-NonCommercial-NoDerivs&\byncnd\\
% |\bync|&Attribution-NonCommercial&\bync\\
% |\byncsa|& Attribution-NonCommercial-ShareAlike&\byncsa\\
% |\bysa|&Attribution-ShareAlike&\bysa\\
% \midrule
% \multicolumn{3}{c}{Version 1.0}\\
% \midrule
% |\nd|&NoDerivs&\nd\\
% |\ndnc|&NoDerivs-NonCommercial&\ndnc\\
% |\nc|&NonCommercial&\nc\\
% |\ncsa|&NonCommercial-ShareAlike&\ncsa\\
% |\sa|&ShareAlike&\sa\\
% \bottomrule
% \end{tabular}
% \end{center}
%
% \section{Known issues}
% As already stated, this package uses the Helvetica font. Be sure it's
% installed in your system.
%
% The strokes are not so elegant. I advice not to use them when typesetting
% |\tiny| and |\scriptsize| text.
%
% The ``NonCommercial'' and ``Share-alike'' logos are just usable, not exactly
% good-looking. I hope I'll be able to release a new version of this package
% soon,  where I use the |picture| environment instead of
% the |\textcircled| command.
%
% The space after the icons is wrong: it's always too big (it's not as big
% while using ``Share-alike'').
%
% \StopEventually{\PrintChanges}
% \section{The Code}
%
% This package needs \LaTeXe\ and the \textsf{rotating} package.
%    \begin{macrocode}
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{cclicenses}[2005/05/20 v0.4 CC licenses typesetting]
\RequirePackage{rotating}
%    \end{macrocode}
%
% Some counters and dimension registers.
%    \begin{macrocode}
\newdimen\chardim
\newdimen\hdim
\newdimen\htmp
\newcount\hpos
\newcount\vpos
%    \end{macrocode}
%
% \DescribeMacro{\SAarrow}
% The CC Share-alike symbol has an arrow. This is the macro to draw an
% arrow, according to the symbol dimensions.
%    \begin{macrocode}
\newcommand{\SA@arrow}{
\hdim\chardim
\ifdim\hdim<1.5pt \hdim=1.5pt\fi
\setlength\unitlength{1sp}
\begin{picture}(0,0)
  \hpos=0
  \vpos\hdim
  \loop
    \put(\hpos,\vpos){
      \rule[0mm]{\hdim}{1000sp}
    }
    \advance\htmp by 1000sp
    \hpos\htmp
    \advance\vpos by -1000
    \advance\hdim by -2000sp
  \ifnum\vpos > 0 \repeat
\end{picture}}
%    \end{macrocode}
%
% \DescribeMacro{\text@cc}
% The primary Creative Commons logo is a circled capital double c.
%    \begin{macrocode}
\DeclareTextCommandDefault{\text@cc}{%
  \let\origfontfamily\f@family
  \let\origfontseries\f@series
  \chardim\fontdimen6\font
  \divide\chardim by 2
  {
    \fontfamily{phv}\fontseries{b}\selectfont%
    \textcircled{%
      \raisebox{.12ex}{\fontsize{\chardim}{\baselineskip}\selectfont{CC}}%
    }
  }
  \fontfamily{\origfontfamily}\fontseries{\origfontseries}\selectfont
}
%    \end{macrocode}
%
% \DescribeMacro{\text@ccnd}
% The ``NoDerivs'' (no derivative works allowed) icon indicates that you may
% not alter, transform, or build upon this work. It shows an equal sign into a
% circle.
%    \begin{macrocode}
\DeclareTextCommandDefault{\text@ccnd}{%
  \let\origfontfamily\f@family
  \let\origfontseries\f@series
  \chardim\fontdimen6\font
  \divide\chardim by 2
  {
    \fontfamily{phv}\fontseries{b}\selectfont%
    \textcircled{%
      \raisebox{.20ex}{\fontsize{\chardim}{\baselineskip}\selectfont{=}}%
    }
  }
  \fontfamily{\origfontfamily}\fontseries{\origfontseries}\selectfont
}
%    \end{macrocode}
%
% \DescribeMacro{\text@ccby}
% The ``Attribution'' logo, introduced in version 2 of the Creative Commons
% license, forces to give the original author credit. It's a must have
% attribute, that is typeset as a \textsc{by:} string surrounded by a circle.
%    \begin{macrocode}
\DeclareTextCommandDefault{\text@ccby}{%
  \let\origfontfamily\f@family
  \let\origfontseries\f@series
  \chardim\fontdimen6\font
  \divide\chardim by 2
  {
    \fontfamily{phv}\fontseries{b}\selectfont%
    \textcircled{%
      \raisebox{.5pt}{\fontsize{\chardim}{\baselineskip}\selectfont%
      {B\kern -.15em Y\kern -.15em:}}%
    }
  }
  \fontfamily{\origfontfamily}\fontseries{\origfontseries}\selectfont
}
%    \end{macrocode}
%
% \DescribeMacro{\text@ccnc}
% The ``NonCommercial'' logo has a barred USD symbol, surrounded by the usual
% circle. Since I used a \texttt{rotate} environment to typeset this logo,
% you may experience some troubles when viewing the \texttt{.dvi} document
% including this logo.
%    \begin{macrocode}
\DeclareTextCommandDefault{\text@ccnc}{%
  \let\origfontfamily\f@family
  \let\origfontseries\f@series
  \chardim\fontdimen6\font
  \divide\chardim by 2
  {
    \fontfamily{phv}\fontseries{b}\selectfont%
    \textcircled{%
      \raisebox{.15ex}{\fontsize{\chardim}{\baselineskip}\selectfont%
      \makebox[0cm][c]{\$}}%
      \setlength{\chardim}{1.98\chardim}%
      \fontsize{\chardim}{\baselineskip}\selectfont%
      \raisebox{-.20ex}{\begin{rotate}{45}\textbackslash\end{rotate}}%
    }
  }
  \fontfamily{\origfontfamily}\fontseries{\origfontseries}\selectfont
}
%    \end{macrocode}
%
% \DescribeMacro{\text@ccsa}
% The ``Share-alike'' logo shows a reversed C with a strange serif: an arrow
% that points down. \emph{\c Ca va sans dire}, circled.
%    \begin{macrocode}
\DeclareTextCommandDefault{\text@ccsa}{%
  \let\origfontfamily\f@family
  \let\origfontseries\f@series
  \fontfamily{phv}\fontseries{b}\selectfont%
%  \hskip.3em
  \textcircled{%
    \makebox[1em][l]{
      \raisebox{.95ex}{\hskip-.45ex
        \begin{rotate}{180}\scshape{c}\end{rotate}}}%
      \chardim\fontdimen6\font
      \divide\chardim by 6
      \raisebox{.3ex}{\hspace{-5ex}
      \SA@arrow}
  }
  \fontfamily{\origfontfamily}\fontseries{\origfontseries}\selectfont
}
%    \end{macrocode}
%
% The following code defines the robust commands to typeset the logos: you can
% now use them in text mode and in math mode.
%
%    \begin{macrocode}
\DeclareRobustCommand{\cc}{%
  \ifmmode{\nfss@text{\text@cc}}\else\text@cc\fi}
\DeclareRobustCommand{\ccnd}{%
  \ifmmode{\nfss@text{\text@ccnd}}\else\text@ccnd\fi}
\DeclareRobustCommand{\ccby}{%
  \ifmmode{\nfss@text{\text@ccby}}\else\text@ccby\fi}
\DeclareRobustCommand{\ccnc}{%
  \ifmmode{\nfss@text{\text@ccnc}}\else\text@ccnc\fi}
\DeclareRobustCommand{\ccsa}{%
  \ifmmode{\nfss@text{\text@ccsa}}\else\text@ccsa\fi}
%    \end{macrocode}
%
% Here are the commands that define the 11 \CC\ licenses. The licenses
% preceded by the ``attribution'' icon are \CC\ version 2.0, the others are
% version 1.0.
%    \begin{macrocode}
\newcommand{\by}{\ccby}
\newcommand{\bynd}{\ccby\ccnd}
\newcommand{\byncnd}{\ccby\ccnc\ccnd}
\newcommand{\bync}{\ccby\ccnc}
\newcommand{\byncsa}{\ccby\ccnc\ccsa}
\newcommand{\bysa}{\ccby\ccsa}
\newcommand{\nd}{\ccnd}
\newcommand{\ndnc}{\ccnd\ccnc}
\newcommand{\nc}{\ccnc}
\newcommand{\ncsa}{\ccnc\ccsa}
\newcommand{\sa}{\ccsa}
\endinput
%    \end{macrocode}
% \Finale
% \endinput