1 files changed, 101 insertions, 0 deletions
diff --git a/grub-core/gfxmenu/gui_util.c b/grub-core/gfxmenu/gui_util.c
new file mode 100644
index 0000000..eba7bb3
--- /dev/null
+++ b/grub-core/gfxmenu/gui_util.c
@@ -0,0 +1,101 @@
+/* gui_util.c - GUI utility functions.  */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2008  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/mm.h>
+#include <grub/misc.h>
+#include <grub/gui.h>
+#include <grub/gui_string_util.h>
+
+
+struct find_by_id_state
+{
+  const char *match_id;
+  grub_gui_component_callback match_callback;
+  void *match_userdata;
+};
+
+static void
+find_by_id_recursively (grub_gui_component_t component, void *userdata)
+{
+  struct find_by_id_state *state;
+  const char *id;
+
+  state = (struct find_by_id_state *) userdata;
+  id = component->ops->get_id (component);
+  if (id && grub_strcmp (id, state->match_id) == 0)
+    state->match_callback (component, state->match_userdata);
+
+  if (component->ops->is_instance (component, "container"))
+    {
+      grub_gui_container_t container;
+      container = (grub_gui_container_t) component;
+      container->ops->iterate_children (container,
+                                        find_by_id_recursively,
+                                        state);
+    }
+}
+
+void
+grub_gui_find_by_id (grub_gui_component_t root,
+                     const char *id,
+                     grub_gui_component_callback cb,
+                     void *userdata)
+{
+  struct find_by_id_state state;
+  state.match_id = id;
+  state.match_callback = cb;
+  state.match_userdata = userdata;
+  find_by_id_recursively (root, &state);
+}
+
+
+struct iterate_recursively_state
+{
+  grub_gui_component_callback callback;
+  void *userdata;
+};
+
+static
+void iterate_recursively_cb (grub_gui_component_t component, void *userdata)
+{
+  struct iterate_recursively_state *state;
+
+  state = (struct iterate_recursively_state *) userdata;
+  state->callback (component, state->userdata);
+
+  if (component->ops->is_instance (component, "container"))
+    {
+      grub_gui_container_t container;
+      container = (grub_gui_container_t) component;
+      container->ops->iterate_children (container,
+                                        iterate_recursively_cb,
+                                        state);
+    }
+}
+
+void
+grub_gui_iterate_recursively (grub_gui_component_t root,
+                              grub_gui_component_callback cb,
+                              void *userdata)
+{
+  struct iterate_recursively_state state;
+  state.callback = cb;
+  state.userdata = userdata;
+  iterate_recursively_cb (root, &state);
+}