%GregorioTeX file.
%
% Copyright (C) 2008-2016 The Gregorio Project (see CONTRIBUTORS.md)
%
% This file is part of Gregorio.
%
% Gregorio is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% Gregorio is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with Gregorio.  If not, see <http://www.gnu.org/licenses/>.

\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{gregoriosyms}
		[2016/08/18 v4.1.5 GregorioTeX symbols only.]% PARSE_VERSION_DATE_LTX

% If gregoriotex has been loaded, then we need to abort the loading process of this package here in order to avoid some conflicts.
\ifcsname gregoriotex@symbols@loaded\endcsname\endinput\fi%

\RequirePackage{kvoptions}%
\RequirePackage{ifluatex}%
\RequirePackage{luatexbase}%
\RequirePackage{luaotfload}
\RequirePackage{luamplib}%
\RequirePackage{xstring}%

\newluatexcatcodetable\gre@atletter %
\setluatexcatcodetable\gre@atletter{%
	\catcode`\@=11 %
}%

% The version of gregorio. All gregoriotex*.tex files must have the same.
% All gtex files must also have the same version.
\xdef\gre@gregorioversion{4.1.5}% GREGORIO_VERSION - VersionManager.py

\providecommand{\gre@declarefileversion}[2]{\relax}

\def\gre@error#1{\PackageError{GregorioTeX}{#1}{}}%
\def\gre@warning#1{\PackageWarning{GregorioTeX}{#1}}%
\def\gre@bug#1{\PackageError{GregorioTeX}{#1 !! This is a bug in Gregorio.  Please report it at https://github.com/gregorio-project/gregorio/issues}{}}%
\def\gre@typeout{\typeout}

\SetupKeyvalOptions{prefix=gre@}
\DeclareStringOption{debug}[all]

% This option allows the user to transform all deprecation messages
% into errors.  Allowing one to determine if the TeX file is compliant
% with future versions of gregoriotex. To enable, use gregoriotex with
% this option: allowdeprecated=false
\DeclareBoolOption[true]{allowdeprecated}

\ProcessKeyvalOptions*

\def\gre@debugmsg#1#2{%
	\IfStrEq{\gre@debug}{}{}%
		%false
		{\IfStrEq{#1}{all}%
			%true
			{\gre@error{Debug error: ‘all’ is not a permitted keyword}}%
			%false
			{\IfStrEq{\gre@debug}{all}%
				%true
				{\gre@typeout{GregorioTeX debug: (#1) #2}}%
				%false
				{\IfSubStr{\gre@debug}{#1}%
					%true
					{\gre@typeout{GregorioTeX debug: (#1) #2}}%
					%false
					{\relax}%
				}%
			}%
		}%
}%

% Macro to handle deprecated macros.
% #1 - the deprecated macro
% #2 - the correct macro to use
\def\gre@deprecated#1#2{%
	\ifgre@allowdeprecated%
		\gre@warning{#1\space is deprecated.\MessageBreak Use #2\space instead}%
	\else%
		\gre@error{#1\space is deprecated.\MessageBreak Use #2\space instead}%
	\fi%
	\relax%
}%

\def\gre@obsolete#1#2{%
	\gre@error{#1\space is obsolete.\MessageBreak Use #2\space instead}%
	\relax%
}%
\AtBeginDocument{\IfStrEq{\gre@debug}{}{}{\typeout{GregorioTeX is in debug mode}\typeout{\gre@debug\space messages will be printed to the log.}}}%

\long\def\gre@iflatex#1{#1}
\input gregoriotex-symbols.tex

\xdef\gre@gregoriotexluaversion{\directlua{tex.write(gregoriotex.get_gregorioversion())}}%

% Test to make sure that gregoriotex.lua is of the same version.
\IfStrEq*{\gre@gregoriotexluaversion}{\gre@gregorioversion}{}{%else
		\gre@error{uncoherent file versions: gregoriosyms.sty is in version \number\gre@gregorioversion \space\space while gregoriotex.lua is in version \gre@gregoriotexluaversion}}%