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hints kitten: Workaround for some broken light color themes that make the hints text color too low contrast to read

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Fixes #7330
This commit is contained in:
Kovid Goyal
2025-01-17 20:22:10 +05:30
parent 182bd9c7b3
commit 8931062a70
5 changed files with 77 additions and 2 deletions
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31
tools/tui/ui_kitten.go
View File

@@ -20,6 +20,37 @@ var RunningAsUI = sync.OnceValue(func() bool {
return os.Getenv("KITTEN_RUNNING_AS_UI") != ""
})
type BasicColors struct {
Foreground uint32 `json:"foreground"`
Background uint32 `json:"background"`
Color0 uint32 `json:"color0"`
Color1 uint32 `json:"color1"`
Color2 uint32 `json:"color2"`
Color3 uint32 `json:"color3"`
Color4 uint32 `json:"color4"`
Color5 uint32 `json:"color5"`
Color6 uint32 `json:"color6"`
Color7 uint32 `json:"color7"`
Color8 uint32 `json:"color8"`
Color9 uint32 `json:"color9"`
Color10 uint32 `json:"color10"`
Color11 uint32 `json:"color11"`
Color12 uint32 `json:"color12"`
Color13 uint32 `json:"color13"`
Color14 uint32 `json:"color14"`
Color15 uint32 `json:"color15"`
}
func ReadBasicColors() (ans BasicColors, err error) {
q := os.Getenv("KITTY_BASIC_COLORS")
if q == "" {
err = fmt.Errorf("No KITTY_BASIC_COLORS env var")
} else {
err = json.Unmarshal(utils.UnsafeStringToBytes(q), &ans)
}
return
}
func PrepareRootCmd(root *cli.Command) {
if RunningAsUI() {
root.CallbackOnError = func(cmd *cli.Command, err error, during_parsing bool, exit_code int) int {

21
tools/utils/colors.go Normal file
View File

@@ -0,0 +1,21 @@
package utils
import (
"fmt"
)
var _ = fmt.Print
func RGBLuminance(r, g, b float32) float32 {
// From ITU BT 601 https://www.itu.int/rec/R-REC-BT.601
return 0.299*r + 0.587*g + 0.114*b
}
func RGBContrast(r1, g1, b1, r2, g2, b2 float32) float32 {
al := RGBLuminance(r1, g1, b1)
bl := RGBLuminance(r2, g2, b2)
if al < bl {
al, bl = bl, al
}
return (al + 0.05) / (bl + 0.05)
}