Highlight support for lco files

[MaKaNu]

Is your requested feature related to a problem? Please describe. [Required]

If I format my letters for the scrlttr2 KOMAScript class I use lco-files for formatting. At the moment their is no package available which supports highlighting lco files. Since they are related to tex files a support from this extension would be fitting.

Describe the solution you'd like [Required]

A similar highlighting as with normal tex files. Here a small example of such file:

\ProvidesFile{brief.lco}[%
  2002/07/09 v0.9a LaTeX2e unsupported letter-class-option]

\usepackage{graphicx}
\usepackage[utf8]{inputenc}
\usepackage{ngerman}
\usepackage{lmodern}
\setkomavar{fromname}{My Name}
\newcommand\addrsecrow{My Org}
\newcommand\rechtsform{Something}
\setkomavar{fromaddress}{WONDERROAD 132 \\12345 Wondercity}
\setkomavar{fromphone}{Tel: +49 (0)30 12 34 56 78 }
\setkomavar{fromfax}{Fax: +49 (0)30 12 34 56 99}
\setkomavar{fromemail}{[email protected]}
\setkomavar{signature}{Mr Blob}
\newcommand\ustid{UstID: DE 123 456 789}
\setkomavar{frombank}{Bankverbindung\\
	   Eurcorp Bank Berlin\\
	   Kto 123 45 67\\
           BLZ 123 456 78
}

\pagestyle{myheadings}
\addtoplength{firstfootvpos}{5mm}
\setplength{firstheadvpos}{12mm}
\setplength{firstheadvpos}{12mm}
\addtolength{\textheight}{15mm}


\setkomafont{backaddress}{\scriptsize}
\typeout{\scdefault}                                                                                                          
\DeclareFixedFont{\fa}{\encodingdefault}{cmr}{m}{\scdefault}{12} 
\DeclareFixedFont{\cc}{\encodingdefault}{cmr}{m}{\scdefault}{24.88} 
\setkomavar{firsthead}{
    \resizebox{\useplength{firstheadwidth}}{!}{%
	\begin{tabular}{c}
	    \cc  \usekomavar{fromname}\\[4mm]
	    \fa  \addrsecrow 
	\end{tabular}
    }
}


\setkomavar{firstfoot}{%
      \scriptsize{
        \parbox{\useplength{firstfootwidth}}{ 
          \rule{180mm}{0.5pt} 
          \begin{tabular}{ll}
	  \usekomavar{fromname}\\
          \rechtsform\\
	  \usekomavar{fromaddress}\\
	    \end{tabular}\hfill
          \begin{tabular}{cc}
	  \usekomavar{fromemail}\\
	  \usekomavar{fromphone}\\
	  \usekomavar{fromfax}\\
	  \ustid
          \end{tabular}\hfill
          \begin{tabular}{rr}
	  \usekomavar{frombank}\\
	             \end{tabular}
       }}
}

\setkomavar{nextfoot}{%
    \parbox{\useplength{firstfootwidth}}{
          \begin{tabular}{ll}
		  \usekomavar{fromname}
	      \end{tabular}\hfill
	      \begin{tabular}{cc}
		  \today 
	      \end{tabular}\hfill
	      \begin{tabular}{rr}
		  \thepage
	      \end{tabular}
    }
}



\endinput
% vim: set filetype=tex  :EOF

As you can see the markdown supports with tex as language, so I think it would be not to complicated.

Desktop [Required]

Please write exact version numbers. Please don't write latest instead of exact numbers.

• OS: WIN10
• VS Code version: 1.69.2
• TeX distribution version: TexLive 2022

Additional questions

Are you using VSCodium?

No

Are you using the Snap or Flatpack versions of VS Code?

No

Are you using LaTeX Workshop with VS Code Remote?

No

[James-Yu]

You can select your highlight language at the bottom right corner of vscode. This does not have any limitation on the file type.

[MaKaNu]

As always fast and helpfull. I really appretiate the work.