mirror of
https://github.com/go-sylixos/elvish.git
synced 2024-12-17 21:38:31 +08:00
118 lines
3.2 KiB
Go
118 lines
3.2 KiB
Go
package ui
|
|
|
|
import (
|
|
"fmt"
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
// Color represents a color.
|
|
type Color interface {
|
|
fgSGR() string
|
|
bgSGR() string
|
|
String() string
|
|
}
|
|
|
|
// Builtin ANSI colors.
|
|
var (
|
|
Black Color = ansiColor(0)
|
|
Red Color = ansiColor(1)
|
|
Green Color = ansiColor(2)
|
|
Yellow Color = ansiColor(3)
|
|
Blue Color = ansiColor(4)
|
|
Magenta Color = ansiColor(5)
|
|
Cyan Color = ansiColor(6)
|
|
White Color = ansiColor(7)
|
|
|
|
BrightBlack Color = ansiBrightColor(0)
|
|
BrightRed Color = ansiBrightColor(1)
|
|
BrightGreen Color = ansiBrightColor(2)
|
|
BrightYellow Color = ansiBrightColor(3)
|
|
BrightBlue Color = ansiBrightColor(4)
|
|
BrightMagenta Color = ansiBrightColor(5)
|
|
BrightCyan Color = ansiBrightColor(6)
|
|
BrightWhite Color = ansiBrightColor(7)
|
|
)
|
|
|
|
// XTerm256Color returns a color from the xterm 256-color palette.
|
|
func XTerm256Color(i uint8) Color { return xterm256Color(i) }
|
|
|
|
// TrueColor returns a 24-bit true color.
|
|
func TrueColor(r, g, b uint8) Color { return trueColor{r, g, b} }
|
|
|
|
var colorNames = []string{
|
|
"black", "red", "green", "yellow",
|
|
"blue", "magenta", "cyan", "white",
|
|
}
|
|
|
|
var colorByName = map[string]Color{
|
|
"black": Black,
|
|
"red": Red,
|
|
"green": Green,
|
|
"yellow": Yellow,
|
|
"blue": Blue,
|
|
"magenta": Magenta,
|
|
"cyan": Cyan,
|
|
"white": White,
|
|
|
|
"bright-black": BrightBlack,
|
|
"bright-red": BrightRed,
|
|
"bright-green": BrightGreen,
|
|
"bright-yellow": BrightYellow,
|
|
"bright-blue": BrightBlue,
|
|
"bright-magenta": BrightMagenta,
|
|
"bright-cyan": BrightCyan,
|
|
"bright-white": BrightWhite,
|
|
}
|
|
|
|
type ansiColor uint8
|
|
|
|
func (c ansiColor) fgSGR() string { return strconv.Itoa(30 + int(c)) }
|
|
func (c ansiColor) bgSGR() string { return strconv.Itoa(40 + int(c)) }
|
|
func (c ansiColor) String() string { return colorNames[c] }
|
|
|
|
type ansiBrightColor uint8
|
|
|
|
func (c ansiBrightColor) fgSGR() string { return strconv.Itoa(90 + int(c)) }
|
|
func (c ansiBrightColor) bgSGR() string { return strconv.Itoa(100 + int(c)) }
|
|
func (c ansiBrightColor) String() string { return "bright-" + colorNames[c] }
|
|
|
|
type xterm256Color uint8
|
|
|
|
func (c xterm256Color) fgSGR() string { return "38;5;" + strconv.Itoa(int(c)) }
|
|
func (c xterm256Color) bgSGR() string { return "48;5;" + strconv.Itoa(int(c)) }
|
|
func (c xterm256Color) String() string { return "color" + strconv.Itoa(int(c)) }
|
|
|
|
type trueColor struct{ r, g, b uint8 }
|
|
|
|
func (c trueColor) fgSGR() string { return "38;2;" + c.rgbSGR() }
|
|
func (c trueColor) bgSGR() string { return "48;2;" + c.rgbSGR() }
|
|
|
|
func (c trueColor) String() string {
|
|
return fmt.Sprintf("#%02x%02x%02x", c.r, c.g, c.b)
|
|
}
|
|
|
|
func (c trueColor) rgbSGR() string {
|
|
return fmt.Sprintf("%d;%d;%d", c.r, c.g, c.b)
|
|
}
|
|
|
|
func parseColor(name string) Color {
|
|
if color, ok := colorByName[name]; ok {
|
|
return color
|
|
}
|
|
if strings.HasPrefix(name, "color") {
|
|
i, err := strconv.Atoi(name[5:])
|
|
if err == nil && 0 <= i && i < 256 {
|
|
return XTerm256Color(uint8(i))
|
|
}
|
|
} else if strings.HasPrefix(name, "#") && len(name) == 7 {
|
|
r, rErr := strconv.ParseUint(name[1:3], 16, 8)
|
|
g, gErr := strconv.ParseUint(name[3:5], 16, 8)
|
|
b, bErr := strconv.ParseUint(name[5:7], 16, 8)
|
|
if rErr == nil && gErr == nil && bErr == nil {
|
|
return TrueColor(uint8(r), uint8(g), uint8(b))
|
|
}
|
|
}
|
|
return nil
|
|
}
|