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package decor
import (
"fmt"
"io"
"strconv"
"github.com/vbauerster/mpb/v4/internal"
)
type percentageType float64
func (s percentageType) Format(st fmt.State, verb rune) {
var prec int
switch verb {
case 'd':
case 's':
prec = -1
default:
if p, ok := st.Precision(); ok {
prec = p
} else {
prec = 6
}
}
io.WriteString(st, strconv.FormatFloat(float64(s), 'f', prec, 64))
if st.Flag(' ') {
io.WriteString(st, " ")
}
io.WriteString(st, "%")
}
// Percentage returns percentage decorator. It's a wrapper of NewPercentage.
func Percentage(wcc ...WC) Decorator {
return NewPercentage("% d", wcc...)
}
// NewPercentage percentage decorator with custom fmt string.
//
// fmt examples:
//
// fmt="%.1f" output: "1.0%"
// fmt="% .1f" output: "1.0 %"
// fmt="%d" output: "1%"
// fmt="% d" output: "1 %"
//
func NewPercentage(fmt string, wcc ...WC) Decorator {
var wc WC
for _, widthConf := range wcc {
wc = widthConf
}
if fmt == "" {
fmt = "% d"
}
d := &percentageDecorator{
WC: wc.Init(),
fmt: fmt,
}
return d
}
type percentageDecorator struct {
WC
fmt string
}
func (d *percentageDecorator) Decor(st *Statistics) string {
p := internal.Percentage(st.Total, st.Current, 100)
return d.FormatMsg(fmt.Sprintf(d.fmt, percentageType(p)))
}
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