Include vendor dependencies

vendor/github.com/fogleman/gg/wrap.go

@@ -0,0 +1,58 @@
+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])
+			if w > width {
+				if x == "" {
+					result = append(result, fields[i])
+					x = ""
+					continue
+				} else {
+					result = append(result, x)
+					x = ""
+				}
+			}
+			x += fields[i] + fields[i+1]
+		}
+		if x != "" {
+			result = append(result, x)
+		}
+	}
+	for i, line := range result {
+		result[i] = strings.TrimSpace(line)
+	}
+	return result
+}