[gnome-builder] prefs: add helper to get preferences widget

[Christian Hergert <chergert src gnome org>]

commit 3a62c33e00978e8b901a5e30fe55b739c7b5838d
Author: Christian Hergert <chergert redhat com>
Date:   Thu May 5 17:38:33 2016 +0300

    prefs: add helper to get preferences widget

 libide/ide-preferences.c                         |   14 ++++++++++++++
 libide/ide-preferences.h                         |    5 +++++
 libide/preferences/ide-preferences-perspective.c |   12 ++++++++++++
 3 files changed, 31 insertions(+), 0 deletions(-)
---
diff --git a/libide/ide-preferences.c b/libide/ide-preferences.c
index 0d13d91..8548eec 100644
--- a/libide/ide-preferences.c
+++ b/libide/ide-preferences.c
@@ -228,3 +228,17 @@ ide_preferences_set_page (IdePreferences *self,
 
   IDE_PREFERENCES_GET_IFACE (self)->set_page (self, page_name, map);
 }
+
+/**
+ * ide_preferences_get_widget:
+ *
+ * Returns: (transfer none) (nullable): A #GtkWidget or %NULL.
+ */
+GtkWidget *
+ide_preferences_get_widget (IdePreferences *self,
+                            guint           widget_id)
+{
+  g_return_val_if_fail (IDE_IS_PREFERENCES (self), NULL);
+
+  IDE_PREFERENCES_GET_IFACE (self)->get_widget (self, widget_id);
+}
diff --git a/libide/ide-preferences.h b/libide/ide-preferences.h
index 3e08465..53a9947 100644
--- a/libide/ide-preferences.h
+++ b/libide/ide-preferences.h
@@ -108,6 +108,9 @@ struct _IdePreferencesInterface
 
   gboolean (*remove_id)        (IdePreferences *self,
                                 guint           widget_id);
+
+  GtkWidget *(*get_widget)     (IdePreferences *self,
+                                guint           widget_id);
 };
 
 void     ide_preferences_add_page         (IdePreferences *self,
@@ -186,6 +189,8 @@ gboolean ide_preferences_remove_id        (IdePreferences *self,
 void     ide_preferences_set_page         (IdePreferences *self,
                                            const gchar    *page_name,
                                            GHashTable     *map);
+GtkWidget *ide_preferences_get_widget     (IdePreferences *self,
+                                           guint           widget_id);
 
 
 G_END_DECLS
diff --git a/libide/preferences/ide-preferences-perspective.c 
b/libide/preferences/ide-preferences-perspective.c
index 09c9fdc..39a8bb3 100644
--- a/libide/preferences/ide-preferences-perspective.c
+++ b/libide/preferences/ide-preferences-perspective.c
@@ -860,6 +860,17 @@ ide_preferences_perspective_set_page (IdePreferences *preferences,
   gtk_widget_set_visible (GTK_WIDGET (self->back_button), FALSE);
 }
 
+static GtkWidget *
+ide_preferences_perspective_get_widget (IdePreferences *preferences,
+                                        guint           widget_id)
+{
+  IdePreferencesPerspective *self = (IdePreferencesPerspective *)preferences;
+
+  g_assert (IDE_IS_PREFERENCES_PERSPECTIVE (self));
+
+  return g_hash_table_lookup (self->widgets, GINT_TO_POINTER (widget_id));
+}
+
 static void
 ide_preferences_iface_init (IdePreferencesInterface *iface)
 {
@@ -874,6 +885,7 @@ ide_preferences_iface_init (IdePreferencesInterface *iface)
   iface->add_custom = ide_preferences_perspective_add_custom;
   iface->set_page = ide_preferences_perspective_set_page;
   iface->remove_id = ide_preferences_perspective_remove_id;
+  iface->get_widget = ide_preferences_perspective_get_widget;
 }
 
 static gchar *