[gtk/wip/chergert/spellcheck: 193/194] spellcheck: deduplicate languages from checker

[Christian Hergert <chergert src gnome org>]

commit 2b67166a38bed54713028da03e070c4e4a490b3e
Author: Christian Hergert <chergert redhat com>
Date:   Mon Mar 15 15:32:47 2021 -0700

    spellcheck: deduplicate languages from checker
    
    We don't want the same language loaded twice which could occur if we had
    something like "en_US" and "en_US.UTF-8" which is turned into "en_US" by
    enchant internally.

 gtk/gtkspellcheck.c | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)
---
diff --git a/gtk/gtkspellcheck.c b/gtk/gtkspellcheck.c
index bfed875074..34de75b89f 100644
--- a/gtk/gtkspellcheck.c
+++ b/gtk/gtkspellcheck.c
@@ -146,6 +146,26 @@ gtk_spell_checker_get_languages (GtkSpellChecker *self)
   return (char **)(gpointer)g_array_free (ar, FALSE);
 }
 
+static gboolean
+gtk_spell_checker_contains_language (GtkSpellChecker  *self,
+                                     GtkSpellLanguage *language)
+{
+  g_assert (GTK_IS_SPELL_CHECKER (self));
+  g_assert (language != NULL);
+  g_assert (language->code != NULL);
+  g_assert (language->provider != NULL);
+
+  for (guint i = 0; i < self->languages->len; i++)
+    {
+      GtkSpellLanguage *element = g_ptr_array_index (self->languages, i);
+
+      if (g_strcmp0 (language->code, element->code) == 0)
+        return TRUE;
+    }
+
+  return FALSE;
+}
+
 static void
 gtk_spell_checker_set_languages (GtkSpellChecker    *self,
                                  const char * const *languages)
@@ -165,7 +185,9 @@ gtk_spell_checker_set_languages (GtkSpellChecker    *self,
               if (language == NULL)
                 continue;
 
-              g_ptr_array_add (self->languages, language);
+              if (!gtk_spell_checker_contains_language (self, language))
+                g_ptr_array_add (self->languages, language);
+
               break;
             }
         }