package statusline

import (
	"fmt"
	"io"
)

type StatusLine struct {
	out io.Writer
	prevLen int
}

func NewStatusLine(out io.Writer) *StatusLine {
	return &StatusLine{out: out}
}

func (sl *StatusLine) Put(line string) {
	fmt.Fprintf(sl.out, "\r%-[1]*[2]s", sl.prevLen, line)
	sl.prevLen = len(line)
}

func (sl *StatusLine) End() {
	fmt.Fprintf(sl.out, "\r%-[1]*[2]s\r", sl.prevLen, "")
}