sampler-fork/console/palette.go

package console

import (
	"fmt"
	ui "github.com/gizak/termui/v3"
)

type Theme string

const (
	ThemeDark  Theme = "dark"
	ThemeLight Theme = "light"
)

const (
	ColorOlive       ui.Color = 178
	ColorDeepSkyBlue ui.Color = 39
	ColorDeepPink    ui.Color = 198
	ColorCian        ui.Color = 43
	ColorOrange      ui.Color = 166
	ColorPurple      ui.Color = 129
	ColorGreen       ui.Color = 64
	ColorDarkRed     ui.Color = 88
	ColorBlueViolet  ui.Color = 57
	ColorDarkGrey    ui.Color = 238
	ColorLightGrey   ui.Color = 254
	ColorGrey        ui.Color = 242
	ColorWhite       ui.Color = 15
	ColorBlack       ui.Color = 0
	ColorClear       ui.Color = -1
)

const (
	MenuColorBackground ui.Color = 235
	MenuColorText       ui.Color = 255
)

type Palette struct {
	ContentColors  []ui.Color
	GradientColors []ui.Color
	BaseColor      ui.Color
	MediumColor    ui.Color
	ReverseColor   ui.Color
}

func GetPalette(theme Theme) Palette {
	switch theme {
	case ThemeDark:
		return Palette{
			ContentColors:  []ui.Color{ColorOlive, ColorDeepSkyBlue, ColorDeepPink, ColorWhite, ColorGrey, ColorGreen, ColorOrange, ColorCian, ColorPurple},
			GradientColors: []ui.Color{39, 44, 47, 82, 148, 185, 209, 203, 198, 196, 125},
			BaseColor:      ColorWhite,
			MediumColor:    ColorDarkGrey,
			ReverseColor:   ColorBlack,
		}
	case ThemeLight:
		return Palette{
			ContentColors:  []ui.Color{ColorBlack, ColorDarkRed, ColorBlueViolet, ColorGrey, ColorGreen},
			GradientColors: []ui.Color{250, 248, 246, 244, 242, 240, 238, 236, 234, 232, 16},
			BaseColor:      ColorBlack,
			MediumColor:    ColorLightGrey,
			ReverseColor:   ColorWhite,
		}
	default:
		panic(fmt.Sprintf("Following theme is not supported: %v", theme))
	}
}

// selects gradient color for cur item (out of max items)
func (palette *Palette) GetGradientColor(cur int, max int) ui.Color {
	ratio := float64(len(palette.GradientColors)) / float64(max)
	return palette.GradientColors[int(ratio*float64(cur))]
}