Add unicode support for correction char

Commit to allow unicode support in omemo/pgp/otr chars misses
adding support to set correction character.
1f8b1eb

Further fixing commit also misses adding support to set the unicode character,
it only adds ability to display unicode correction character in the settings.
5cf6ee15cf6ee1bc6d0b99b01891bc455a657bf022a72b0

src/command/cmd_funcs.c

@@ -9329,7 +9329,6 @@ cmd_os(ProfWin* window, const char* const command, gchar** args)
 gboolean
 cmd_correction(ProfWin* window, const char* const command, gchar** args)
 {
-    // enable/disable
     if (g_strcmp0(args[0], "on") == 0) {
         _cmd_set_boolean_preference(args[0], "Last Message Correction", PREF_CORRECTION_ALLOW);
         caps_add_feature(XMPP_FEATURE_LAST_MESSAGE_CORRECTION);
@@ -9340,15 +9339,12 @@ cmd_correction(ProfWin* window, const char* const command, gchar** args)
         return TRUE;
     }
 
-    // char
     if (g_strcmp0(args[0], "char") == 0) {
-        if (args[1] == NULL) {
-            cons_bad_cmd_usage(command);
-        } else if (strlen(args[1]) != 1) {
+        if (args[1] == NULL || g_utf8_strlen(args[1], 4) != 1) {
             cons_bad_cmd_usage(command);
         } else {
-            prefs_set_correction_char(args[1][0]);
-            cons_show("LMC char set to %c.", args[1][0]);
+            prefs_set_correction_char(args[1]);
+            cons_show("LMC char set to %s.", args[1]);
         }
     }
 

src/config/preferences.c

@@ -1281,13 +1281,13 @@ prefs_get_correction_char(void)
 }
 
 void
-prefs_set_correction_char(char ch)
+prefs_set_correction_char(char* ch)
 {
-    char str[2];
-    str[0] = ch;
-    str[1] = '\0';
-
-    g_key_file_set_string(prefs, PREF_GROUP_UI, "correction.char", str);
+    if (g_utf8_strlen(ch, 4) == 1) {
+        g_key_file_set_string(prefs, PREF_GROUP_UI, "correction.char", ch);
+    } else {
+        log_error("Could not set correction char: %s", ch);
+    }
 }
 
 gboolean

src/config/preferences.h

@@ -296,7 +296,7 @@ gint prefs_get_occupants_indent(void);
 void prefs_set_occupants_indent(gint value);
 
 gchar* prefs_get_correction_char(void);
-void prefs_set_correction_char(char ch);
+void prefs_set_correction_char(char* ch);
 
 void prefs_add_login(const char* jid);
 

src/config/theme.c

@@ -484,8 +484,8 @@ _load_preferences(void)
 
     if (g_key_file_has_key(theme, "ui", "correction.char", NULL)) {
         auto_gchar gchar* ch = g_key_file_get_string(theme, "ui", "correction.char", NULL);
-        if (ch && strlen(ch) > 0) {
-            prefs_set_correction_char(ch[0]);
+        if (ch && g_utf8_strlen(ch, 4) == 1) {
+            prefs_set_correction_char(ch);
         }
     }