[NTG-context] Custom color schemes in t-vim

[Nicola]

On 2020-05-14, Aditya Mahajan <adityam at umich.edu> wrote:
> On Thu, 14 May 2020, Nicola wrote:
>
>> Quick question: Is \startcolorscheme... \stopcolorscheme (still)
>> supported by t-vim?

> It is supposed to work. If it doesn't, then it is a bug. Could you
> provide a complete MWE.

Please find a MWE at the bottom of this post.

The expected behaviour is that the keyword `function` in the JavaScript
snippet and `foobar` in the Ruby snippet should be colored and in
italics, as comments are. The respective Vim highlight groups are
`javaScriptFunction` and `rubyMethodName`, which both resolve to
`Function`.

The actual behaviour is that comments are highlighted correctly, but
I do not get any syntax highlighting for functions.

Thanks for t-vim, btw: I can't express in words how nice an idea it is!

Nicola

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\setupcolors[state=start]

\definecolor[colorone]    [r=0.251, g=0.349, b=0.322]
\definecolor[colortwo]    [r=0.612, g=0.608, b=0.478]
\definecolor[colorthree]  [r=1.0,   g=0.827, b=0.576]
\definecolor[colorfour]   [r=1.0,   g=0.592, b=0.310]
\definecolor[colorfive]   [r=0.960, g=0.310, b=0.161]
\definecolor[nearlywhite] [r=0.988, g=0.988, b=0.988]

\setupinteraction[state=start]
\setupcolors[textcolor=colorone]
\setupbackgrounds[page][background=color,backgroundcolor=nearlywhite]

\usemodule[vim]
\unprotect
\startcolorscheme[oceansunset]
  \definesyntaxgroup[Comment][\c!color={colorfive},\c!style=italic]
  \definesyntaxgroup[Function][\c!color={colorfive},\c!style=italic]
  % \definesyntaxgroup[rubyMethodName][\c!color={colorfive},\c!style=italic]
  % \definesyntaxgroup[javaScriptFunction][\c!color={colorfive},\c!style=italic]
\stopcolorscheme
\protect

\definevimtyping[JAVASCRIPT][
  syntax=javascript,
  alternative=oceansunset,
  escape=on
]

\definevimtyping[RUBY][
  syntax=ruby,
  alternative=oceansunset,
  escape=on
]

\starttext
\startJAVASCRIPT
// JavaScript program listing
function foobar() {
  print("Hello World");
}
\stopJAVASCRIPT

\startRUBY
# Ruby program listing
def foobar
  print("Hello World")
end
\stopRUBY
\stoptext
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%