Wishlist: xterm 256 color support

[perlun]

Hi,

Thanks for a nice tool! 👍 I discovered it today since I wanted to get better outputs from tailing my Tomcat & application logs.

One thing I noted that seems to be missing from the feature matrix which would be incredibly nice is to be able to use 8-bit colors. They are supported by some of the modern terminal emulators - very nice since it gives a much larger amount of colors to select from.

The Ruby library which funnily is your namesake https://github.com/sickill/rainbow has this. Its implementation is particularly interesting, since it allows you to enter an RGB value (say #FF00FF) which will then be automatically converted to the closest 8-bit color code.

That makes the tool incredibly nice to use, but is obviously a bit more work. Just being able to specify these extended ANSI escape codes would be a good start in this area.

[nicoulaj]

Indeed, and some terminals even support true color.

The difficulty here is more to define a usable config syntax. One intermediate step I could see is to introduce support for color themes, so that user can replace the default 8 colors (black, white, red, green, yellow, blue, magenta, cyan) with 8/24 bit ones. But that would still be limited to 8 colors.

Related: #2

[perlun]

The difficulty here is more to define a usable config syntax

I agree, right now the syntax is pretty much connected to the ANSI 3/4-bit colors so this is a bit of a change from that perspective.

Maybe something like this would do:

[filters]
faint: ^[A-Z][a-z]+\s\d+,\s\d+\s\d+:\d+:\d+|^\d+\s[a-z]+\s\d+\s\d+:\d+:\d+
FF0000: ^GRAVE:\s.*|^SEVERE:\s.*
FFFF00: ^ATTENTION:\s.*|^WARNING:\s.*

(Can't really prefix them with # since we use that for commenting. 😊)