[gnome-builder/editor-layout] grid: add helper to find a tab of certain type

[Christian Hergert <chergert src gnome org>]

commit 6e6869f400b4ed55edfc95291712c6863aeb3bb7
Author: Christian Hergert <christian hergert me>
Date:   Mon Dec 1 05:08:53 2014 -0800

    grid: add helper to find a tab of certain type

 src/tabs/gb-tab-grid.c |   27 +++++++++++++++++++++++++++
 src/tabs/gb-tab-grid.h |    2 ++
 2 files changed, 29 insertions(+), 0 deletions(-)
---
diff --git a/src/tabs/gb-tab-grid.c b/src/tabs/gb-tab-grid.c
index a549615..1615d8b 100644
--- a/src/tabs/gb-tab-grid.c
+++ b/src/tabs/gb-tab-grid.c
@@ -756,6 +756,33 @@ gb_tab_grid_focus_tab (GbTabGrid *grid,
     }
 }
 
+GbTab *
+gb_tab_grid_find_tab_typed (GbTabGrid *grid,
+                            GType      type)
+{
+  GbTab *ret = NULL;
+  GList *list;
+  GList *iter;
+
+  g_return_val_if_fail (GB_IS_TAB_GRID (grid), NULL);
+  g_return_val_if_fail (g_type_is_a (type, GB_TYPE_TAB), NULL);
+
+  list = gb_tab_grid_get_tabs (grid);
+
+  for (iter = list; iter; iter = iter->next)
+    {
+      if (g_type_is_a (G_TYPE_FROM_INSTANCE (iter->data), type))
+        {
+          ret = iter->data;
+          break;
+        }
+    }
+
+  g_list_free (list);
+
+  return ret;
+}
+
 static void
 gb_tab_grid_grab_focus (GtkWidget *widget)
 {
diff --git a/src/tabs/gb-tab-grid.h b/src/tabs/gb-tab-grid.h
index 3a1f8b7..fa75f6b 100644
--- a/src/tabs/gb-tab-grid.h
+++ b/src/tabs/gb-tab-grid.h
@@ -63,6 +63,8 @@ void       gb_tab_grid_focus_next_tab     (GbTabGrid *grid,
                                            GbTab     *tab);
 void       gb_tab_grid_focus_previous_tab (GbTabGrid *grid,
                                            GbTab     *tab);
+GbTab     *gb_tab_grid_find_tab_typed     (GbTabGrid *grid,
+                                           GType      type);
 
 G_END_DECLS