klog/color.go

package klog

import (
	"fmt"
	"strconv"
)

func (l *Logger) M(s interface{}, attrs ...Attribute) string {
	if !l.color {
		return fmt.Sprint(s)
	}
	styles := ""
	for i, v := range attrs {
		if i >= 3 {
			break
		}
		if i > 0 {
			styles += ";"
		}
		styles = styles + strconv.Itoa(int(v))
	}
	return fmt.Sprintf("\033[%sm%s\033[0m", styles, s)
}

type Attribute int

// Base attributes
const (
	Reset Attribute = iota
	Bold
	Faint
	Italic
	Underline
	BlinkSlow
	BlinkRapid
	ReverseVideo
	Concealed
	CrossedOut
)

// Foreground text colors
const (
	FgBlack Attribute = iota + 30
	FgRed
	FgGreen
	FgYellow
	FgBlue
	FgMagenta
	FgCyan
	FgWhite
)

// Foreground Hi-Intensity text colors
const (
	FgHiBlack Attribute = iota + 90
	FgHiRed
	FgHiGreen
	FgHiYellow
	FgHiBlue
	FgHiMagenta
	FgHiCyan
	FgHiWhite
)

// Background text colors
const (
	BgBlack Attribute = iota + 40
	BgRed
	BgGreen
	BgYellow
	BgBlue
	BgMagenta
	BgCyan
	BgWhite
)

// Background Hi-Intensity text colors
const (
	BgHiBlack Attribute = iota + 100
	BgHiRed
	BgHiGreen
	BgHiYellow
	BgHiBlue
	BgHiMagenta
	BgHiCyan
	BgHiWhite
)