Add syntax group for colors and numbers

[Fymyte]

Highlight Numbers and colors as Numbers
Giving colors a group now allows for using https://github.com/ap/vim-css-color types plugins

I am definitely not an expert in pattern matching so I've felt my way along and stopped when it worked
Any advice on how to improve those patterns is very welcome.

Signed-off-by: Fymyte pierguill@gmail.com

[fladson]

Hi @Fymyte, thank you for the contribution and sorry for not seeing this earlier.

I will take a look and get back to you.

[Fymyte]

I think that for the colors, we should only match something like #[0-9A-Fa-f]\{6,8} but I am not sure if it would match colors

[Fymyte]

I think I finally managed to restrain color matching. I found what I was doing wrong if you can test this

[fladson]

Hey @Fymyte I did some testing today and I am not sure if we are there yet.
Some numbers found in the middle of values are being highlighted but not the entire value, so I am not sure if that is the desired outcome here.
I believe you want to highlight only the values that are numbers, right? If so, we also need to include the possible prefixes (+, -, etc.) and suffixes (%, px, etc.).

For the theme configuration, it is working just fine:

[Fymyte]

Fixed matching for colors with only 3 char, uses vim's builtin match for Hexa characters
Added match for prefix/suffix of number.
Fixed number highlighted in words

In the latter, I had to tweak the kittyActionKW match as it matched every whitespaces which followed, thus making impossible for number to use leader whitespace for matching.
It should not break anything from what I've seen

[fladson]

Looking better now, thanks for the changes.
Still not matching pt, px, is it working for you?

[Fymyte]

Looking better now, thanks for the changes.
Still not matching pt, px, is it working for you?

I have created a new kittyUnit syntax group.
By default they are linked to Type.
Do prefer to see them as Number ?
Modification is line 40

[fladson]

Ah, I got it now, let's keep it as it is.
Thank you again for the contribution @Fymyte!