patch 8.1.1459: popup window border looks bad when 'ambiwidth' is "double"
Problem: Popup window border looks bad when 'ambiwidth' is "double".
(Yasuhiro Matsumoto)
Solution: Only use line drawing characters when 'ambiwidth' is "single".
(Ken Takata, closes #4477)
diff --git a/src/screen.c b/src/screen.c
index 53343e8..d72d779 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -1078,7 +1078,9 @@
+ wp->w_height + wp->w_popup_padding[2] + wp->w_popup_border[2];
popup_attr = get_wcr_attr(wp);
- if (enc_utf8)
+ // We can only use these line drawing characters when 'encoding' is
+ // "utf-8" and 'ambiwidth' is "single".
+ if (enc_utf8 && p_ambw == 's')
{
border_char[0] = border_char[2] = 0x2550;
border_char[1] = border_char[3] = 0x2551;