[libdazzle] app: load icons when dzl_application_add_resource_path()

[Christian Hergert <chergert src gnome org>]

commit 7257d3a7eb58ae7aa9512f7d9093ec9dbc0f8c4c
Author: Christian Hergert <chergert redhat com>
Date:   Mon Jun 5 14:33:00 2017 -0700

    app: load icons when dzl_application_add_resource_path()
    
    We want to ensure that $resource_path/icons/ is used to locate icons
    during application runtime.

 src/app/dzl-application.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/src/app/dzl-application.c b/src/app/dzl-application.c
index 949c023..927e114 100644
--- a/src/app/dzl-application.c
+++ b/src/app/dzl-application.c
@@ -55,6 +55,7 @@ dzl_application_real_add_resource_path (DzlApplication *self,
   g_autoptr(GError) error = NULL;
   g_autofree gchar *menu_path = NULL;
   g_autofree gchar *keythemes_path = NULL;
+  g_autofree gchar *icons_path = NULL;
   guint merge_id;
 
   g_assert (DZL_IS_APPLICATION (self));
@@ -86,6 +87,14 @@ dzl_application_real_add_resource_path (DzlApplication *self,
    */
   keythemes_path = g_build_filename (resource_path, "keythemes", NULL);
   dzl_shortcut_manager_append_search_path (priv->shortcut_manager, keythemes_path);
+
+  /*
+   * We want to allow loading icons from $resource_path/icons/ just like Gtk
+   * will do for the base application. However, we cannot remove these once
+   * they've been added, so remove_resource_path() does nothing.
+   */
+  icons_path = g_build_filename (resource_path, "icons", NULL);
+  gtk_icon_theme_add_resource_path (gtk_icon_theme_get_default (), icons_path);
 }
 
 static void