patch 8.2.3524: GUI: ligatures are not used
Problem: GUI: ligatures are not used.
Solution: Add the 'guiligatures' option. (Dusan Popovic, closes #8933)
diff --git a/src/gui.c b/src/gui.c
index 687e9da..1edf659 100644
--- a/src/gui.c
+++ b/src/gui.c
@@ -460,6 +460,10 @@
gui.scrollbar_width = gui.scrollbar_height = SB_DEFAULT_WIDTH;
gui.prev_wrap = -1;
+# ifdef FEAT_GUI_GTK
+ CLEAR_FIELD(gui.ligatures_map);
+#endif
+
#if defined(ALWAYS_USE_GUI) || defined(VIMDLL)
result = OK;
#else
@@ -1065,6 +1069,36 @@
return OK;
}
+#if defined(FEAT_GUI_GTK) || defined(PROTO)
+/*
+ * Set list of ascii characters that combined can create ligature.
+ * Store them in char map for quick access from gui_gtk2_draw_string.
+ */
+ void
+gui_set_ligatures(void)
+{
+ char_u *p;
+
+ if (*p_guiligatures != NUL)
+ {
+ // check for invalid characters
+ for (p = p_guiligatures; *p != NUL; ++p)
+ if (*p < 32 || *p > 127)
+ {
+ emsg(_(e_ascii_code_not_in_range));
+ return;
+ }
+
+ // store valid setting into ligatures_map
+ CLEAR_FIELD(gui.ligatures_map);
+ for (p = p_guiligatures; *p != NUL; ++p)
+ gui.ligatures_map[*p] = 1;
+ }
+ else
+ CLEAR_FIELD(gui.ligatures_map);
+}
+#endif
+
static void
gui_set_cursor(int row, int col)
{