+ NCURSES_CH_T ch = oline->text[j];
+#if USE_WIDEC_SUPPORT
+ /*
+ * Special case for leftmost character of the displayed area.
+ * Only half of a double-width character may be visible.
+ */
+ if (j == pmincol
+ && j > 0
+ && isnac(ch)) {
+ SetChar(ch, L(' '), AttrOf(oline->text[j - 1]));
+ }
+#endif
+ if (!CharEq(ch, nline->text[n])) {
+ nline->text[n] = ch;