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package decor
import (
"fmt"
"strconv"
"github.com/vbauerster/mpb/v8/internal"
)
var _ fmt.Formatter = percentageType(0)
type percentageType float64
func (s percentageType) Format(st fmt.State, verb rune) {
prec := -1
switch verb {
case 'f', 'e', 'E':
prec = 6 // default prec of fmt.Printf("%f|%e|%E")
fallthrough
case 'b', 'g', 'G', 'x', 'X':
if p, ok := st.Precision(); ok {
prec = p
}
default:
verb, prec = 'f', 0
}
b := strconv.AppendFloat(make([]byte, 0, 16), float64(s), byte(verb), prec, 64)
if st.Flag(' ') {
b = append(b, ' ', '%')
} else {
b = append(b, '%')
}
_, err := st.Write(b)
if err != nil {
panic(err)
}
}
// Percentage returns percentage decorator. It's a wrapper of NewPercentage.
func Percentage(wcc ...WC) Decorator {
return NewPercentage("% d", wcc...)
}
// NewPercentage percentage decorator with custom format string.
//
// `format` printf compatible verb
//
// `wcc` optional WC config
//
// format examples:
//
// format="%d" output: "1%"
// format="% d" output: "1 %"
// format="%.1f" output: "1.0%"
// format="% .1f" output: "1.0 %"
// format="%f" output: "1.000000%"
// format="% f" output: "1.000000 %"
func NewPercentage(format string, wcc ...WC) Decorator {
if format == "" {
format = "% d"
}
f := func(s Statistics) string {
p := internal.Percentage(uint(s.Total), uint(s.Current), 100)
return fmt.Sprintf(format, percentageType(p))
}
return Any(f, wcc...)
}
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