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config: add [colors].dim0-7

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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
This commit is contained in:
Daniel Eklöf 2021-11-03 14:25:38 +01:00
parent 0d2a429109
commit c01904a2c7
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GPG key ID: 5BBD4992C116573F
7 changed files with 91 additions and 9 deletions
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3
config.h
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@ -158,6 +158,8 @@ struct config {
uint32_t selection_bg;
uint32_t url;
uint32_t dim[8];
struct {
uint32_t fg;
uint32_t bg;
@ -173,6 +175,7 @@ struct config {
bool jump_label:1;
bool scrollback_indicator:1;
bool url:1;
uint8_t dim;
} use_custom;
} colors;