config: add [colors].dim0-7

This allows you to configure custom colors to be used when colors are
being dimmed (`\E[2m`).

It is implemented by color matching (just like
bold-text-in-bright=palette-based); the color-to-be-dimmed is matched
against the current color palette.

If it matches one of the regular colors (colors 0-7), the
corresponding “dim” color will be used.

If it matches one of the bright colors (colors 8-15), the
corresponding “regular” color will be used (but *only* if the “dim”
color has been set).

Otherwise, the color is dimmed by reducing its luminance.

The default behavior, i.e. when dim0-7 hasn’t been configured, is to
dim by reducing luminance for *all* colors. I.e. we don’t do any color
matching at all. In particular, this means that dimming a bright color
will *not* result in the corresponding “regular” color.

Closes #776
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Daniel Eklöf 2021-11-03 14:25:38 +01:00
parent 0d2a429109
commit c01904a2c7
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7 changed files with 91 additions and 9 deletions

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@ -47,6 +47,8 @@
* `[csd].border-width` and `[csd].border-color`, allowing you to
configure the width and color of the CSD border.
* Support for `XTMODKEYS` with `Pp=4` and `Pv=2` (_modifyOtherKeys=2_).
* `[colors].dim0-7` options, allowing you to configure custom “dim”
colors (https://codeberg.org/dnkl/foot/issues/776).
### Changed