Using terminal's default fg and bg in 16/8-color variant

[jan-warchol]

First, thanks for making this great toolkit! Very nice :-)

I'm working on colortemplate for selenized and there's one thing I'm missing: being able to define a Color that will use terminal's default background (or foreground) when used in 16/8-color mode. Currently color definitions can specify only one of 16 ANSI colors, but actually all terminals have a separate setting for foreground and background color. (I.e. default background doesn't have to be the same as ANSI black).

Here's a minimal example:

# vim: ft=colortemplate
Full name:  background and foreground test
Short name: bg_fg_test
Author:     JW <[email protected]>

Background: dark

# Color palette
Color:      bg_grey #181818 ~ Black  # I'd like to say "bg" or "none" here,
Color:      fg_grey #b9b9b9 ~ White  # but it throws an error

# Highlight group definitions
Variant:    gui 256 8
Normal fg_grey bg_grey

Combined with terminal palette defined like this:

bg: #181818
black: #3b3b3b
br_black: #626262
white: #8c8c8c
fg: #b9b9b9
br_white: #e7e7e7
...

Which means that it looks as follows:

The result in terminal Vim is different than in GUI Vim:

(background in terminal vim is 3b3b3b while it should be 181818, foreground is e7e7e7 while it should be b9b9b9).

I've been able to work around this with something like this, but it's a bit lame...

# vim: ft=colortemplate
Full name:  background and foreground test
Short name: bg_fg_test
Author:     JW <[email protected]>

Background: dark

# Color palette
Color:      bg_grey #181818 ~ Black
Color:      fg_grey #b9b9b9 ~ White

# Highlight group definitions
Variant:    gui 256
Normal fg_grey bg_grey

Variant:    8
Normal none none

[lifepillar]

The current master should address this. You may now write:

Color:      bg_grey #181818 ~ none
Color:      fg_grey #b9b9b9 ~ none

to have ctermfg and/or ctermbg items set to NONE in variants with 16 colors or less. The none keyword is not highlighted, but I'll fix that, too.

[jan-warchol]

It works! You're amazing, thanks :D