package text import ( "bytes" "fmt" "github.com/mattn/go-runewidth" "strings" ) // LeftPadMaxLine pads a string on the left by a specified amount and pads the // string on the right to fill the maxLength func LeftPadMaxLine(text string, length, leftPad int) string { var rightPart string = text scrWidth := runewidth.StringWidth(text) // truncate and ellipse if needed if scrWidth+leftPad > length { rightPart = runewidth.Truncate(text, length-leftPad, "...") } else if scrWidth+leftPad < length { rightPart = runewidth.FillRight(text, length-leftPad) } return fmt.Sprintf("%s%s", strings.Repeat(" ", leftPad), rightPart, ) } // LeftPad left pad each line of the given text func LeftPad(text string, leftPad int) string { var result bytes.Buffer pad := strings.Repeat(" ", leftPad) for _, line := range strings.Split(text, "\n") { result.WriteString(pad) result.WriteString(line) result.WriteString("\n") } return result.String() }