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\RequirePackage{xparse}
\ProvidesExplPackage{stripsemantex}{2020/09/27}{0.44}{}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%																		%
%		stripSemanTeX -- strip the document of SemanTeX markup			%
%		https://ctan.org/pkg/semantex									%
%		(C) 2020 Sebastian Ørsted										%
%       sorsted@gmail.com												%
%																		%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\msg_new:nnn { stripsemantex } { not_luatex } { This~package~only~works~with~LuaTeX;~the~current~TeX~run~has~been~terminated. }

\msg_new:nnn { stripsemantex } { source_not_expected } { The~source~code~in~the~file~did~not~fit~the~code~in~the~.semtex~file.~We~expected~#1~but~got~#2.~This~is~not~supposed~to~happen.~Please~report~this~bug~ASAP. }

\msg_new:nnn { stripsemantex } { no_semtex_file } { The~file~#1.semtex~was~not~found.~Did~you~remember~to~do \\ \token_to_str:N\SemantexSetup{semtexfile=true}? }

\msg_new:nnn { stripsemantex } { begin_document_not_found } { No~\token_to_str:N\begin{document}~found~in~the~file~#1;~it~has~to~be~in~the~main~document. }

\msg_new:nnn { stripsemantex } { rerun_stripsemantex } { Some~SemanTeX~commands~are~still~remaining~in~your~document;~please~(re)run~TeX~on~the~file~#1_prestripped.tex,~and~then~rerun~LuaTeX~on~the~file~\jobname.tex. }

\sys_if_engine_luatex:F { \msg_fatal:nn { stripsemantex } { not_luatex } }

\lua_now:n { require('stripsemantex.lua') }

\cs_new_protected:Npn\stripsemantex_create_prestripped_file:n#1
{	
	\file_if_exist:nF { #1.semtex }
	{
		\msg_fatal:nnn { stripsemantex } { no_semtex_file } { #1 }
	}
	
	\lua_now:e {
		copy_file('\lua_escape:e{#1}.tex', '\lua_escape:e{#1}_prestripped.tex')
	}

	\lua_now:e
	{
		openFile('\lua_escape:e{#1}_prestripped.tex')
	}
	
	\cs_set:Npn\DeclareObject##1
	{
		\lua_now:e { addIDsToRegisters ( '\cs_to_str:N ##1' ) }
	}
	
	\cs_set:Npn\DeclareClass##1{
		\lua_now:e { addIDsToRegisters ( '\cs_to_str:N ##1' ) }
	}
	
	\cs_set:Npn\BeginSource##1\EndSource\BeginOutput##2\EndOutput{}
	
	\file_input:n { #1.semtex }
	
	\lua_now:e
	{
		removeSuperfluousIDs()
		addNumbersToIDs()
		closeFile('\lua_escape:e{#1}_prestripped.tex')
	}
	
	\msg_warning:nnn { stripsemantex } { rerun_stripsemantex } { #1 }
}

\bool_new:N\g_stripsemantex_something_left_to_strip_bool

\cs_new_protected:Npn\stripsemantex_strip_file:n#1
{
	\file_if_exist:nF { #1_prestripped.semtex }
	{
		\msg_fatal:nnn { stripsemantex } { no_semtex_file } { #1_prestripped }
	}

	\lua_now:e {
		openFile('\lua_escape:e{#1}_prestripped.tex')
	}
	
	\DeclareDocumentCommand\SemantexID{ m t{\BeginSource} }
	{
		\IfBooleanT{##2}
		{
			\strip_semantex_id_command:w ##1 \BeginSource
		}
	}
	
	
	\cs_set:Npn\strip_semantex_id_command:w##1\BeginSource##2\EndSource\BeginOutput##3\EndOutput
	{
		\bool_set_true:N \g_stripsemantex_something_left_to_strip_bool
		\lua_now:e
		{
			semantexIDluacommand( '\lua_escape:e{\tl_trim_spaces:n{##1}}' , '\lua_escape:e{\exp_not:n{##2}}' , '\lua_escape:e{\exp_not:n{##3}}' )
		}
	}
	
	\cs_set:Npn\DeclareObject##1{}
	
	\cs_set:Npn\DeclareClass##1{}
	
	\cs_set:Npn\BeginSource##1\EndSource\BeginOutput##2\EndOutput{}
	
	\file_input:n { #1_prestripped.semtex }
	
	\lua_now:e
	{
		stripRemainingSemantexIDs()
	}
	
	\bool_if:NTF \g_stripsemantex_something_left_to_strip_bool
	{
		\cs_set:Npn\DeclareObject##1
		{
			\lua_now:e { addIDsToRegisters ( '\cs_to_str:N ##1' ) }
		}
		
		\cs_set:Npn\DeclareClass##1
		{
			\lua_now:e { addIDsToRegisters ( '\cs_to_str:N ##1' ) }
		}
		
		\cs_set:Npn\SemantexID##1 {}
		
		\cs_set:Npn\BeginSource##1\EndSource\BeginOutput##2\EndOutput {}
		
		\file_input:n { #1.semtex }
		
		\lua_now:e
		{
			removeSuperfluousIDs()
			addNumbersToIDs()
			closeFile('\lua_escape:e{#1}_prestripped.tex')
		}
		
		\msg_warning:nnn { stripsemantex } { rerun_stripsemantex } { #1 }
	}
	{
		\lua_now:e
		{
			removeParenthesisCommands()
			addSemtexPackageToFile()
			closeFile('\lua_escape:e{#1}_prestripped.tex')
			copy_file('\lua_escape:e{#1}_prestripped.tex', '\lua_escape:e{#1}_stripped.tex')
		}
	}
}


\cs_new_protected:Npn\StripSemantex#1
{
	\group_begin:
	\ExplSyntaxOn 	% this will prevent the inserting of the annoying extra spaces
					% from the .semtex file into the document.
	\file_compare_timestamp:nNnTF { #1.semtex } < { #1_prestripped.semtex }
	{
		\stripsemantex_strip_file:n { #1 }
	}
	{
		\stripsemantex_create_prestripped_file:n { #1 }
	}
	\group_end:
}

\cs_new_protected:Npn\StripSemantexStripComments#1
{
	\lua_now:e
	{
		copy_file('\lua_escape:e{#1}.tex', '\lua_escape:e{#1}_comments_stripped.tex')
		openFile('\lua_escape:e{#1}_comments_stripped.tex')
		stripComments()
		closeFile('\lua_escape:e{#1}_comments_stripped.tex')
	}
}