From e1d727de9f970263fd0b37ddad758be7fe173a2e Mon Sep 17 00:00:00 2001
From: palytoxin <sxty32@gmail.com>
Date: Tue, 11 May 2021 15:36:42 +0800
Subject: [PATCH] fix utf8 string truncate.

---
 modules/base/tool.go | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/modules/base/tool.go b/modules/base/tool.go
index 157bd9bc3..ebbff8671 100644
--- a/modules/base/tool.go
+++ b/modules/base/tool.go
@@ -21,6 +21,7 @@ import (
 	"strings"
 	"time"
 	"unicode"
+	"unicode/utf8"
 
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/log"
@@ -284,22 +285,22 @@ func Subtract(left interface{}, right interface{}) interface{} {
 // EllipsisString returns a truncated short string,
 // it appends '...' in the end of the length of string is too large.
 func EllipsisString(str string, length int) string {
-	if length <= 3 {
+	if utf8.RuneCountInString(str) <= 3 {
 		return "..."
 	}
-	if len(str) <= length {
+	if utf8.RuneCountInString(str) <= length {
 		return str
 	}
-	return str[:length-3] + "..."
+	return string([]rune(str)[:length-3]) + "..."
 }
 
 // TruncateString returns a truncated string with given limit,
 // it returns input string if length is not reached limit.
 func TruncateString(str string, limit int) string {
-	if len(str) < limit {
+	if utf8.RuneCountInString(str) < limit {
 		return str
 	}
-	return str[:limit]
+	return string([]rune(str)[:limit])
 }
 
 // StringsToInt64s converts a slice of string to a slice of int64.