gtkfontchooserwidget.c: Fix builds without PangoFT2

Currently, only if PangoFT2 is present and used it is supported to retrieve the
languages that are supported by a particular font, and so we skip building the
parts that populate the language list for filtering and instead filter based on
what the default language is reported to us by Pango.  Don't show the (empty)
language list if we don't have PangoFT2.

gtk/gtkfontchooserwidget.c

@@ -32,6 +32,7 @@
 #include "gtkcustomfilter.h"
 #include "gtkentry.h"
 #include "gtkfilter.h"
+#include "gtkframe.h"
 #include "gtkgrid.h"
 #include "gtkfontchooser.h"
 #include "gtkfontchooserutils.h"
@@ -128,6 +129,7 @@ struct _GtkFontChooserWidget
   GtkWidget       *axis_grid;
   GtkWidget       *feature_box;
 
+  GtkFrame          *language_frame;
   GtkWidget         *language_list;
   GtkStringList     *languages;
   GHashTable        *language_table;
@@ -379,6 +381,7 @@ user_filter_cb (gpointer item,
 
       ret = TRUE;
 
+#ifdef HAVE_PANGOFT
       if (PANGO_IS_FC_FONT (font))
         {
           PangoLanguage **langs;
@@ -396,6 +399,11 @@ user_filter_cb (gpointer item,
                 }
             }
         }
+      else
+#endif
+        if (self->filter_language == pango_language_get_default ())
+          return TRUE;
+
 
       g_object_unref (font);
       pango_font_description_free (desc);
@@ -931,8 +939,8 @@ gtk_font_chooser_widget_class_init (GtkFontChooserWidgetClass *klass)
   gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, font_name_label);
   gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, feature_box);
   gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, axis_grid);
+  gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, language_frame);
   gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, language_list);
-
   gtk_widget_class_bind_template_callback (widget_class, get_font_name);
   gtk_widget_class_bind_template_callback (widget_class, get_font_attributes);
   gtk_widget_class_bind_template_callback (widget_class, stop_search_cb);
@@ -1033,6 +1041,7 @@ select_added (GListModel *model,
   gtk_single_selection_set_selected (selection, position);
 }
 
+#ifdef HAVE_PANGOFT
 static void
 add_languages_from_font (GtkFontChooserWidget *self,
                          gpointer              item)
@@ -1090,6 +1099,7 @@ add_languages_from_font (GtkFontChooserWidget *self,
   g_object_unref (font);
   pango_font_description_free (desc);
 }
+#endif
 
 /* We incrementally populate our fontlist to prevent blocking
  * the font chooser for a long time with expensive FcFontSort
@@ -1112,6 +1122,7 @@ add_to_fontlist (GtkWidget     *widget,
 
   n = gtk_slice_list_model_get_size (model);
 
+#ifdef HAVE_PANGO_FT
   for (i = n; i < n + 10; i++)
     {
       gpointer item = g_list_model_get_item (child_model, i);
@@ -1120,6 +1131,7 @@ add_to_fontlist (GtkWidget     *widget,
       add_languages_from_font (self, item);
       g_object_unref (item);
     }
+#endif
 
   n += 10;
 
@@ -1156,6 +1168,7 @@ update_fontlist (GtkFontChooserWidget *self)
   g_object_unref (model);
 }
 
+#ifdef HAVE_PANGOFT
 static void
 setup_lang_item (GtkSignalListItemFactory *factory,
                  gpointer                  item,
@@ -1181,6 +1194,7 @@ bind_lang_item (GtkSignalListItemFactory *factory,
 
   obj = gtk_list_item_get_item (GTK_LIST_ITEM (item));
   str = gtk_string_object_get_string (GTK_STRING_OBJECT (obj));
+
   language = pango_language_from_string (str);
   name = get_language_name (language);
 
@@ -1214,7 +1228,7 @@ language_selection_changed (GtkSelectionModel    *model,
     gtk_filter_changed (GTK_FILTER (self->user_filter), GTK_FILTER_CHANGE_DIFFERENT);
 }
 
-static void
+static gboolean
 setup_language_list (GtkFontChooserWidget *self)
 {
   GtkListItemFactory *factory;
@@ -1241,11 +1255,16 @@ setup_language_list (GtkFontChooserWidget *self)
   g_signal_connect (factory, "bind", G_CALLBACK (bind_lang_item), self);
   gtk_list_view_set_factory (GTK_LIST_VIEW (self->language_list), factory);
   g_object_unref (factory);
+
+  return TRUE;
 }
+#endif
 
 static void
 gtk_font_chooser_widget_init (GtkFontChooserWidget *self)
 {
+  gboolean show_language_frame = FALSE;
+
   gtk_widget_init_template (GTK_WIDGET (self));
 
   self->axes = g_hash_table_new_full (axis_hash, axis_equal, NULL, axis_free);
@@ -1281,7 +1300,13 @@ gtk_font_chooser_widget_init (GtkFontChooserWidget *self)
   gtk_font_chooser_widget_take_font_desc (self, NULL);
 
   gtk_custom_filter_set_filter_func (self->user_filter, user_filter_cb, self, NULL);
-  setup_language_list (self);
+
+#ifdef HAVE_PANGO_FT
+  show_language_frame = setup_language_list (self);
+#endif
+
+  if (!show_language_frame)
+    gtk_widget_hide (GTK_WIDGET (self->language_frame));
 }
 
 /**

gtk/ui/gtkfontchooserwidget.ui

@@ -97,7 +97,7 @@
                                   </object>
                                 </child>
                                 <child>
-                                  <object class="GtkFrame">
+                                  <object class="GtkFrame" id="language_frame">
                                     <property name="margin-start">12</property>
                                     <child>
                                       <object class="GtkScrolledWindow">