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\ProvidesFile{gloss-farsi.ldf}[polyglossia: module for farsi]
\RequirePackage{bidi}
\RequirePackage{farsical}
\makeatletter

\ifx\l@farsi\@undefined
  %\xpg@nopatterns{Farsi}%
  \adddialect\l@farsi\l@nohyphenation
\fi

\def\farsi@RL{\relax}

\newif\if@western@numerals
\def\tmp@western{western}
\define@key{farsi}{numerals}[eastern]{%
	\def\@tmpa{#1}%
	\ifx\@tmpa\tmp@western\@western@numeralstrue\else%
	  \@western@numeralsfalse%
	\fi}

% NOT YET USED	
\define@key{farsi}{locale}[default]{%
	\def\@farsi@locale{#1}}

%TODO add option for CALENDAR

\setkeys{farsi}{locale,numerals}

\def\farsigregmonth#1{\ifcase#1%
  \or ژانویه\or فوریه\or مارس\or آوریل\or مه\or ژوئن\or ژوئیه؛\or ژویه\or اوت\or سپتامبر\or اکتبر\or نوامبر\or دسامبر\fi}
\def\farsimonth#1{\ifcase#1%
  \or کانون ثانی\or شباط\or اذار%؛\or ادار
    \or نیسان\or ایار\or حزیران\or تموز\or آب\or ایلول\or تشرین اول\or تشرین ثانی\or کانون اول\fi}

\def\captionsfarsi{%
\def\prefacename{\@ensure@RTL{پیشگفتار}}% 
\def\refname{\@ensure@RTL{مراجع}}%
\def\abstractname{\@ensure@RTL{چکیده}}%
\def\bibname{\@ensure@RTL{کتاب‌نامه}}%
\def\chaptername{\@ensure@RTL{فصل}}%
\def\appendixname{\@ensure@RTL{پیوست}}%
\def\contentsname{\@ensure@RTL{فهرست مطالب}}%
\def\listfigurename{\@ensure@RTL{لیست تصاویر}}%
\def\listtablename{\@ensure@RTL{لیست جداول}}%
\def\indexname{\@ensure@RTL{نمایه}}%
\def\figurename{\@ensure@RTL{شكل}}%
\def\tablename{\@ensure@RTL{جدول}}%
\def\partname{\@ensure@RTL{بخش}}%
%\def\enclname{\@ensure@RTL{}}%<-- Needs translation
%\def\ccname{\@ensure@RTL{}}%<-- Needs translation
%\def\headtoname{\@ensure@RTL{}}%<-- Needs translation
\def\pagename{\@ensure@RTL{صفحة}}%
%\def\seename{\@ensure@RTL{}}%<-- Needs translation
%\def\alsoname{\@ensure@RTL{}}%<-- Needs translation
\def\proofname{\@ensure@RTL{برهان}}%
\def\glossaryname{\@ensure@RTL{لغت‌نامه}}%<-- Needs to be checked
}
\def\datefarsi{%
   \def\today{\@ensure@RTL{\farsinumber\day\space\farsigregmonth{\month}\space\farsinumber\year}}%
}

\def\farsinumber#1{\if@western@numerals\RL{\number#1}\else%
\ifnum\XeTeXcharglyph"06F0 > 0%
{\protect\addfontfeature{Mapping=farsidigits}\number#1}%
\else%
{\protect\addfontfeature{Mapping=arabicdigits}\number#1}%
\fi\fi}

%\def\farsinum#1{\expandafter\farsinumber\csname c@#1\endcsname}
%\def\farsibracenum#1{(\expandafter\farsinumber\csname c@#1\endcsname)}
%\def\farsiornatebracenum#1{\char"FD3E\expandafter\farsinumber\csname c@#1\endcsname\char"FD3F}
%\def\farsialph#1{\expandafter\@farsialph\csname c@#1\endcsname}

\ifcsdef{abjad}{}{%
\def\abjad#1{%
\ifnum#1>1999 \xpg@warning{Illegal value (#1) for abjad numeral} {#1}
\else
  \ifnum#1<\z@\space\xpg@warning{Illegal value (#1) for abjad numeral}%
  \else
    \ifnum#1<10\expandafter\abj@num@i\number#1%
    \else
      \ifnum#1<100\expandafter\abj@num@ii\number#1%
      \else
        \ifnum#1<\@m\expandafter\abj@num@iii\number#1%
        \else
          \ifnum#1<\@M\expandafter\abj@num@iv\number#1%since #1<2000, we must have 1000
          \fi
        \fi
      \fi
    \fi
  \fi
\fi
}
\def\abjad@zero{}
\def\abj@num@i#1{%
  \ifcase#1\or ا\or ب\or ج\char"200D\or د% 
           \or ه\or و\or ز\or ح\or ط\fi
  \ifnum#1=\z@\abjad@zero\fi}
\def\abj@num@ii#1{%
  \ifcase#1\or ي\or ك\or ل\or م\or ن%
           \or س\or ع\or ف\or ص\fi 
  \ifnum#1=\z@\fi\abj@num@i}
\def\abj@num@iii#1{%
  \ifcase#1\or ق\or ر\or ش\or ت\or ث%
            \or خ\or ذ\or ض\or ظ\fi
  \ifnum#1=\z@\fi\abj@num@ii}
\def\abj@num@iv#1{%
  \ifcase#1\or غ\fi
  \ifnum#1=\z@\fi\abj@num@iii}
}

\def\farsi@numbers{%
   \let\@latinalph\@alph%
   \let\@latinAlph\@Alph%
   \let\@alph\abjad%
   \let\@Alph\abjad%
}
\def\nofarsi@numbers{%
  \let\@alph\@latinalph%
  \let\@Alph\@latinAlph%
  }

\def\farsi@globalnumbers{%
   \let\@latinarabic\@arabic%
   \let\@arabic\farsinumber%
   % For some reason \thefootnote needs to be set separately:
   \renewcommand\thefootnote{\protect\farsinumber{\c@footnote}}%
   }

\def\nofarsi@globalnumbers{
   \let\@arabic\@latinarabic%
   \renewcommand\thefootnote{\protect\number{\c@footnote}}%
   }

\def\farsi@language{\language=\l@farsi}

\def\farsi@font{%
\font\zf@basefont="\csname zf@family@fontdef\f@family\endcsname" at \f@size pt
\@ifundefined{farsifont}{%
      \@ifundefined{arabicfont}{%
        \zf@check@ot@script{arab}%
	\if@tempswa%
	  \addfontfeature{Script=Arabic}%
	\else%
	  \PackageError{polyglossia}{^^J
	  The current font does not contain the Arabic script!^^J
	  Please define \string\arabicfont\space or \string\farsifont\space with \newfontfamily}%
	\fi%
	\zf@check@ot@lang{FAR}%
	\if@tempswa\addfontfeature{Language=Farsi}\fi
	}%
      {\arabicfont%
       \zf@check@ot@lang{FAR}%
       \if@tempswa\addfontfeature{Language=Farsi}\fi}
      }% 
{\farsifont}}
% TODO add setup to define Sans and Mono Arabic fonts if desired
\def\farsi@font@sf{%
  \@ifundefined{farsifontsf}{%
%  \sffamily% FIXME
%    \font\zf@basefont="\csname zf@family@fontdef\f@family\endcsname" at \f@size pt
%  \zf@check@ot@script{arab}%
%  \if@tempswa%
%    \addfontfeature{Script=Arabic}%
%  \else%
    \farsi@font%
%  \fi%  
  }%
  {\farsifontsf}%
}
\def\farsi@font@tt{%
  \@ifundefined{farsifonttt}{%
%    \ttfamily% FIXME
%    \font\zf@basefont="\csname zf@family@fontdef\f@family\endcsname" at \f@size pt
%  \zf@check@ot@script{arab}%
%  \if@tempswa%
%    \addfontfeature{Script=Arabic}%
%  \else%
    \farsi@font%
%  \fi%  
  }%
  {\farsifonttt}%
}

\def\selectnormalfontfarsi{%
   \let\normalfont=\farsi@font%
   \let\rmfamily=\farsi@font%
   \let\sffamily=\farsi@font@sf%
   \let\ttfamily=\farsi@font@tt%
   \def\reset@font{\normalfont}}

\def\blockextras@farsi{%
   \let\@@MakeUppercase\MakeUppercase%
   \def\MakeUppercase##1{##1}%
   }
\def\noextras@farsi{%
   \let\MakeUppercase\@@MakeUppercase%
   }
\endinput