utils.go

package tabulate

import (
	"bytes"
	"unicode/utf8"
)

func utf8Len(str string) int { return utf8.RuneCountInString(str) }

func padToken(token string, padding rune, left int, right int) string {
	var output bytes.Buffer

	for i := 0; i < left; i++ {
		output.WriteRune(padding)
	}
	output.WriteString(token)
	for i := 0; i < right; i++ {
		output.WriteRune(padding)
	}
	return output.String()
}

func center(token string, padding rune, size int) string {
	padLength := size - utf8Len(token)
	half := padLength / 2

	return padToken(token, padding, half, half+(padLength%2))
}

func leftAlign(token string, padding rune, size int) string {
	return padToken(token, padding, 0, size-utf8Len(token))
}

func rightAlign(token string, padding rune, size int) string {
	return padToken(token, padding, size-utf8Len(token), 0)
}