Added function to block input of restricted symbols in entry

source/libublsettings-gtk3.c

@@ -1214,6 +1214,32 @@ void yon_on_text_insert_only_digits(GtkEditable *editable, const gchar *text, gi
     g_free(new_text);
 }
 
+void yon_on_insert_restricted_check(GtkEditable *editable, const gchar *text, gint length, gint *position, gpointer){
+        gchar *new_text = g_new(gchar, length + 1);
+    gint i, j = 0;
+
+    for (i = 0; i < length; i++) {
+        if (text[i]=='!'||text[i]=='@'||text[i]=='#'||text[i]=='%'||text[i]=='^'||text[i]=='&'||text[i]=='*'||text[i]=='\"'||text[i]=='\'') {
+            new_text[j] = text[i];
+            j++;
+        }
+    }
+
+    if (j < length) {
+        g_signal_handlers_block_by_func(editable, G_CALLBACK(yon_on_insert_restricted_check), NULL);
+        gtk_editable_insert_text(editable, new_text, j, position);
+        g_signal_handlers_unblock_by_func(editable, G_CALLBACK(yon_on_insert_restricted_check), NULL);
+        g_signal_stop_emission_by_name(editable, "insert-text");
+    }
+
+    g_free(new_text);
+}
+
+void yon_gtk_entry_block_restricted_symbols(GtkEntry *target){
+    g_return_if_fail(GTK_IS_ENTRY(target));
+    g_signal_connect(G_OBJECT(target),"insert-text",G_CALLBACK(yon_on_insert_restricted_check),NULL);
+}
+
 // GtkEntry section
 // struct entry_pattern_data {
 //     GtkEntry *entry;

source/libublsettings-gtk3.h

@@ -485,6 +485,8 @@ void yon_gtk_entry_set_password_visibility_icon(GtkEntry *target);
 
 void yon_on_text_insert_only_digits(GtkEditable *editable, const gchar *text, gint length, gint *position, gpointer user_data);
 
+void yon_gtk_entry_block_restricted_symbols(GtkEntry *target);
+
 // GtkTreeStore section
 
 dictionary *yon_gtk_tree_store_get_children(GtkTreeStore *tree, GtkTreeIter *parent,int column);