fix: wrap multibyte char

wrap.go

@@ -2,42 +2,21 @@ package gg
 
 import (
 	"strings"
-	"unicode"
 )
 
 type measureStringer interface {
 	MeasureString(s string) (w, h float64)
 }
 
-func splitOnSpace(x string) []string {
-	var result []string
-	pi := 0
-	ps := false
-	for i, c := range x {
-		s := unicode.IsSpace(c)
-		if s != ps && i > 0 {
-			result = append(result, x[pi:i])
-			pi = i
-		}
-		ps = s
-	}
-	result = append(result, x[pi:])
-	return result
-}
-
 func wordWrap(m measureStringer, s string, width float64) []string {
 	var result []string
 	for _, line := range strings.Split(s, "\n") {
-		fields := splitOnSpace(line)
-		if len(fields)%2 == 1 {
-			fields = append(fields, "")
-		}
 		x := ""
-		for i := 0; i < len(fields); i += 2 {
-			w, _ := m.MeasureString(x + fields[i])
+		for _, c := range line {
+			w, _ := m.MeasureString(x + string(c))
 			if w > width {
 				if x == "" {
-					result = append(result, fields[i])
+					result = append(result, string(c))
 					x = ""
 					continue
 				} else {
@@ -45,7 +24,7 @@ func wordWrap(m measureStringer, s string, width float64) []string {
 					x = ""
 				}
 			}
-			x += fields[i] + fields[i+1]
+			x += string(c)
 		}
 		if x != "" {
 			result = append(result, x)