1package text
 2
 3import (
 4	"strings"
 5
 6	"github.com/mattn/go-runewidth"
 7)
 8
 9// Len return the length of a string in a terminal, while ignoring the terminal
10// escape sequences.
11func Len(text string) int {
12	length := 0
13	escape := false
14
15	for _, char := range text {
16		if char == '\x1b' {
17			escape = true
18		}
19		if !escape {
20			length += runewidth.RuneWidth(char)
21		}
22		if char == 'm' {
23			escape = false
24		}
25	}
26
27	return length
28}
29
30// MaxLineLen return the length in a terminal of the longest line, while
31// ignoring the terminal escape sequences.
32func MaxLineLen(text string) int {
33	lines := strings.Split(text, "\n")
34
35	max := 0
36
37	for _, line := range lines {
38		length := Len(line)
39		if length > max {
40			max = length
41		}
42	}
43
44	return max
45}