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%D \module
%D [ file=t-syntax-highlight,
%D version=2014.08.13,
%D title=\CONTEXT\ User Module,
%D subtitle=Code syntax highlighting,
%D author=Aditya Mahajan,
%D date=\currentdate,
%D copyright=Aditya Mahajan,
%D email=adityam <at> ieee <dot> org,
%D license=Simplified BSD License]
\writestatus{loading}{Code syntax highlighting (ver: 2014.08.13)}
\startmodule [syntax-highlight]
\usemodule [syntax-groups]
\usemodule [filter] % loads module-catcodes
\unprotect
\startinterface all
\setinterfaceconstant {syntax} {syntax}
\setinterfaceconstant {highlight} {highlight}
\setinterfaceconstant {highlightcolor} {highlightcolor}
\stopinterface
%D Name space
\definenamespace
[syntaxhighlighting]
[\c!type=module,
\c!name=syntaxhighlighting,
\c!command=\v!yes,
setup=\v!list,
\c!style=\v!no,
\s!parent=syntaxhighlighting]
\appendtoks
\defineexternalfilter[\currentsyntaxhighlighting]
[\s!parent=\????syntaxhighlighting\currentexternalfilter,\c!taglabel=\vimtyping@id]%
\normalexpanded{\definelinenumbering [\currentsyntaxhighlighting]}%
\setevalue{type\currentsyntaxhighlighting file}{\getvalue{process\currentsyntaxhighlighting file}}%
\to\everydefinesyntaxhighlighting
\appendtoks
% \externalfitlterparameter does not work, so it is better to use
% \syntaxhighlighting parameter.
\normalexpanded{\setuplinenumbering[\currentsyntaxhighlighting]
[
\c!method=\syntaxhighlightingparameter{\c!number\c!method},
\c!conversion=\syntaxhighlightingparameter\c!numberconversion,
\c!location=\syntaxhighlightingparameter{\c!number\c!location},
\c!style=\syntaxhighlightingparameter\c!numberstyle,
\c!color=\syntaxhighlightingparameter\c!numbercolor,
\c!width=\syntaxhighlightingparameter{\c!number\c!width},
\c!left=\syntaxhighlightingparameter{\c!number\c!left},
\c!right=\syntaxhighlightingparameter{\c!number\c!right},
\c!command=\syntaxhighlightingparameter\c!numbercommand,
\c!distance=\syntaxhighlightingparameter{\c!number\c!distance},
\c!align=\syntaxhighlightingparameter{\c!number\c!align},
]}%
\to\everysetupsyntaxhighlighting
\def\syntaxhighlighting@id {syntaxhighlighting}
\edef\t!syntaxhighlighting {\syntaxhighlighting@id}
%D Helper macro
\def\syntaxhighlighting@yes{\v!yes,\v!on}
\startsetups syntaxhighlighting@setup
\edef\currentsyntaxhighlighting{\currentexternalfilter}
\edef\colorscheme@name{\externalfilterparameter\c!alternative}
\let\SYN\syntaxgroup
\edef\HGL{\externalfilterparameter{\c!highlight\c!command}}
\let\\\textbackslash
\let\{\textbraceleft
\let\}\textbraceright
\let\SYNBOL\donothing
\let\SYNEOL\donothing
\setupbar[syntaxhighlightline][color=\externalfilterparameter\c!highlightcolor]
\def\tab##1%
{\dorecurse{##1}{\obeyedspace}}%
\forgetall
\doifinset{\externalfilterparameter\c!option}{\v!packed}
{\setupwhitespace[\v!none,\v!flexible]}%
\doadaptleftskip{\externalfilterparameter\c!margin}%
\doifnotinset{\externalfilterparameter\c!option}{\v!hyphenated}
{\language\minusone}%
\setcatcodetable\externalfilter@minimal_catcodes
\expandafter\def\activeendoflinetoken{\strut\par}
\activatespacehandler{\????syntaxhighlighting\externalfilterparameter\c!space}
\raggedright
\stopsetups
\starttexdefinition syntaxhighlighting@read_command #1
\syntaxhighlighting@linenumbering_start
\ReadFile{#1}
\syntaxhighlighting@linenumbering_stop
\stoptexdefinition
\starttexdefinition syntaxhighlighting@linenumbering_start
\doifinset{\externalfilterparameter\c!numbering}\syntaxhighlighting@yes
{\let\SYNBOL=\syntaxhighlighting_begin_number_lines
\let\SYNEOL=\syntaxhighlighting_end_number_lines
\startlinenumbering
[\currentsyntaxhighlighting]
[
\c!method=\v!type,
\c!start=\externalfilterparameter{\c!number\c!start},
\c!step=\externalfilterparameter{\c!number\c!step},
\c!continue=\externalfilterparameter{\c!number\c!continue},
]}
\dostarttagged\t!syntaxhighlighting\colorscheme@name
\stoptexdefinition
\starttexdefinition syntaxhighlighting@linenumbering_stop
\dostoptagged
\doifinset{\externalfilterparameter\c!numbering}\syntaxhighlighting@yes
{\stoplinenumbering}
\stoptexdefinition
\newcount\nofsyntaxhighlightinglines
\starttexdefinition syntaxhighlighting_begin_number_lines
\global\advance\nofsyntaxhighlightinglines\plusone
\attribute\verbatimlineattribute\nofsyntaxhighlightinglines
\stoptexdefinition
\starttexdefinition syntaxhighlighting_end_number_lines
\attribute\verbatimlineattribute\attributeunsetvalue
\stoptexdefinition
\setupsyntaxhighlighting
[\c!tab=4,
\c!space=\v!off,
\c!lines=\v!fixed,
\c!margin=\zeropoint,
\c!start=1,
\c!stop=0,
% \c!syntax=context,
\c!alternative=pscolor,
\c!before=,
\c!after=,
\c!spacebefore=\v!none,
\c!spaceafter=\v!none,
\c!location=\v!paragraph,
\c!style=\tttf,
\c!color=,
\c!align={\v!flushleft,\v!nothyphenated}, %Does not work due to \forgetall
\c!filtercommand=echo, % placeholder
\c!continue=yes,
\c!read=\v!yes,
\c!readcommand=\syntaxhighlighting@read_command,
\c!output=\externalfilterinputfile, % placeholder
\c!setups=syntaxhighlighting@setup,
\c!option=\v!packed, % \v!hyphenated
\s!parent=\????externalfilter,
% Numbering options
\c!numbering=\v!no,
\c!number\c!start=1,
\c!number\c!step=1,
\c!number\c!continue=\v!no,
\c!numberconversion=\v!numbers,
\c!number\c!method=\v!type,
\c!number\c!location=\v!left,
\c!numberstyle=\ttx,
\c!numbercolor=,
\c!number\c!width=2em,
\c!number\c!left=,
\c!number\c!right=,
\c!numbercommand=,
\c!number\c!distance=0.5em,
\c!number\c!align=\v!flushright,
%Highlight options
\c!highlight=,
\c!highlightcolor=lightgray,
\c!highlight\c!command=\syntaxhighlightline,
]
% Space handler
%
% The space handing code for MkII and MkIV is not consistent. So, we provide our
% own versions.
\setvalue{\????syntaxhighlighting::\c!lines::\v!split}{\hskip}
\setvalue{\????syntaxhighlighting::\c!lines::\v!fixed}{\dontleavehmode\kern}
% default
\setvalue{\????syntaxhighlighting::\c!lines::}{\dontleavehmode\kern}
\def\syntaxhighlighting@split%
{\getvalue{\????syntaxhighlighting::\c!lines::\externalfilterparameter\c!lines}}
% Visible space
\installspacemethod {\????syntaxhighlighting\v!on}
{\obeyspaces
\unexpanded\def\obeyedspace
{\syntaxhighlighting@split\zeropoint\relax
\hbox{\normalcontrolspace}%
\syntaxhighlighting@split\zeropoint\relax}}%
% Invisible space
\installspacemethod {\????syntaxhighlighting\v!off}
{\obeyspaces
\unexpanded\def\obeyedspace
{\syntaxhighlighting@split\interwordspace\relax}}
% Default
\installspacemethod {\????syntaxhighlighting}
{\activatespacehandler {\????syntaxhighlighting\v!off}}
% Line highlighting
\definebar[syntaxhighlightline]
[\c!order=\v!background,
\c!rulethickness=2.5,
\c!method=0,
\c!offset=1.375,
\c!continue=\v!yes,
\c!color=\externalfilterparameter\c!highlightcolor,
]
% For backward compatibility
\def\syntaxhighlighting@namespace {\????syntaxhighlighting}
\def\syntaxhighlighting@name {\currentsyntaxhighlighting}
\protect
\stopmodule
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