From 2704a977b8b0b48bd09659c73ee26243e8798eb2 Mon Sep 17 00:00:00 2001
From: Shuanglei Tao <tsl0922@gmail.com>
Date: Fri, 28 Jun 2024 18:51:09 +0800
Subject: [PATCH] fix menu title abbreviation

---
 src/lua/dyn_menu.lua | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/lua/dyn_menu.lua b/src/lua/dyn_menu.lua
index 0452815..cab9944 100644
--- a/src/lua/dyn_menu.lua
+++ b/src/lua/dyn_menu.lua
@@ -171,10 +171,16 @@ local function utf8_sub(s, i, j)
     return table.concat(t)
 end
 
+-- return the length of a utf8 string
+local function utf8_len(s)
+    local _, count = s:gsub(UTF8_PATTERN, "")
+    return count
+end
+
 -- abbreviate title if it's too long
 local function abbr_title(str)
     if not str or str == '' then return '' end
-    if o.max_title_length > 0 and str:len() > o.max_title_length then
+    if o.max_title_length > 0 and utf8_len(str) > o.max_title_length then
         return utf8_sub(str, 1, o.max_title_length) .. '...'
     end
     return str