Add e_load_ui_manager_definition().

Loads a UI definition into a GtkUIManager from Evolution's UI directory.

We actually had this function for a brief period during the 2.29 series,
before Express Mode was a thing.  I'm reviving the function to take over
for EUIManager.

2 files changed, 38 insertions, 0 deletions

diff --git a/e-util/e-misc-utils.c b/e-util/e-misc-utils.c
index 776027da09..97e5c2d37e 100644
--- a/e-util/e-misc-utils.c
+++ b/e-util/e-misc-utils.c
@@ -708,6 +708,42 @@ e_load_ui_builder_definition (GtkBuilder *builder,
 	}
 }
 
+/**
+ * e_load_ui_manager_definition:
+ * @ui_manager: a #GtkUIManager
+ * @basename: basename of the UI definition file
+ *
+ * Loads a UI definition into @ui_manager from Evolution's UI directory.
+ * Failure here is fatal, since the application can't function without
+ * its UI definitions.
+ *
+ * Returns: The merge ID for the merged UI.  The merge ID can be used to
+ *          unmerge the UI with gtk_ui_manager_remove_ui().
+ **/
+guint
+e_load_ui_manager_definition (GtkUIManager *ui_manager,
+                              const gchar *basename)
+{
+	gchar *filename;
+	guint merge_id;
+	GError *error = NULL;
+
+	g_return_val_if_fail (GTK_IS_UI_MANAGER (ui_manager), 0);
+	g_return_val_if_fail (basename != NULL, 0);
+
+	filename = g_build_filename (EVOLUTION_UIDIR, basename, NULL);
+	merge_id = gtk_ui_manager_add_ui_from_file (
+		ui_manager, filename, &error);
+	g_free (filename);
+
+	if (error != NULL) {
+		g_error ("%s: %s", basename, error->message);
+		g_assert_not_reached ();
+	}
+
+	return merge_id;
+}
+
 /* Helper for e_categories_add_change_hook() */
 static void
 categories_changed_cb (GObject *useless_opaque_object,
diff --git a/e-util/e-misc-utils.h b/e-util/e-misc-utils.h
index d45f8d34e8..d7dea7afc3 100644
--- a/e-util/e-misc-utils.h
+++ b/e-util/e-misc-utils.h
@@ -81,6 +81,8 @@ GtkWidget *	e_builder_get_widget		(GtkBuilder *builder,
 						 const gchar *widget_name);
 void		e_load_ui_builder_definition	(GtkBuilder *builder,
 						 const gchar *basename);
+guint		e_load_ui_manager_definition	(GtkUIManager *ui_manager,
+						 const gchar *basename);
 void		e_categories_add_change_hook	(GHookFunc func,
 						 gpointer object);