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package termfmt
import (
"fmt"
"log"
"os"
"strconv"
"strings"
"sync"
"golang.org/x/term"
)
var initIsTerminal sync.Once
var isTerminal bool
type Style string
type RGB struct {
Red, Green, Blue uint8
}
const (
Bold Style = "bold"
Dim Style = "dim"
Red Style = "red"
Green Style = "green"
Yellow Style = "yellow"
Blue Style = "blue"
DarkYellow Style = "dark-yellow"
)
func (style Style) String(s string) string {
if !IsTerminal() {
return s
}
switch style {
case Bold:
return fmt.Sprintf("\033[01m%s\033[0m", s)
case Dim:
return fmt.Sprintf("\033[02m%s\033[0m", s)
case Red:
return fmt.Sprintf("\033[91m%s\033[0m", s)
case Green:
return fmt.Sprintf("\033[92m%s\033[0m", s)
case Yellow:
return fmt.Sprintf("\033[93m%s\033[0m", s)
case Blue:
return fmt.Sprintf("\033[94m%s\033[0m", s)
case DarkYellow:
return fmt.Sprintf("\033[33m%s\033[0m", s)
default:
return s
}
}
func HexString(s string, fg string, bg string) string {
if !IsTerminal() {
return s
}
return RGBString(s, HexToRGB(fg), HexToRGB(bg))
}
func RGBString(s string, fg, bg RGB) string {
if !IsTerminal() {
return s
}
return fmt.Sprintf("\033[38;2;%d;%d;%dm\033[48;2;%d;%d;%dm%s\033[0m",
fg.Red, fg.Green, fg.Blue, bg.Red, bg.Green, bg.Blue, s)
}
func (style Style) Sprint(args ...interface{}) string {
return style.String(fmt.Sprint(args...))
}
func (style Style) Sprintf(format string, args ...interface{}) string {
return style.String(fmt.Sprintf(format, args...))
}
func HexToRGB(hex string) RGB {
var rgb RGB
hex = strings.TrimPrefix(hex, "#")
if len(hex) != 6 {
log.Fatalf("not a valid hex color %q", hex)
}
for i := 0; i < 3; i++ {
v, err := strconv.ParseUint(hex[i*2:i*2+2], 16, 8)
if err != nil {
log.Fatal(err)
}
switch i {
case 0:
rgb.Red = uint8(v)
case 1:
rgb.Green = uint8(v)
case 2:
rgb.Blue = uint8(v)
}
}
return rgb
}
func ReplaceLine() string {
if !IsTerminal() {
return "\n"
}
return "\x1b[1K\r"
}
func InitIsTerminal(b bool) {
initIsTerminal.Do(func() {
isTerminal = b
})
}
func IsTerminal() bool {
initIsTerminal.Do(func() {
isTerminal = term.IsTerminal(int(os.Stdout.Fd()))
})
return isTerminal
}
func Bell() {
if IsTerminal() {
fmt.Print("\a")
}
}
|
