[gnome-builder/wip/chergert/perspective] libide: sort perspectives by their priority

[Christian Hergert <chergert src gnome org>]

commit cc28a6ff6447a42419dadefd06ee3f8fbd354f51
Author: Christian Hergert <chergert redhat com>
Date:   Mon Nov 16 23:02:00 2015 -0800

    libide: sort perspectives by their priority

 libide/ide-workbench.c |   37 +++++++++++++++++++++++++++++++++++++
 1 files changed, 37 insertions(+), 0 deletions(-)
---
diff --git a/libide/ide-workbench.c b/libide/ide-workbench.c
index 268b49f..2e76a9b 100644
--- a/libide/ide-workbench.c
+++ b/libide/ide-workbench.c
@@ -65,6 +65,41 @@ ide_workbench_notify_visible_child (IdeWorkbench *self,
     }
 }
 
+static gint
+ide_workbench_compare_perspective (gconstpointer a,
+                                   gconstpointer b)
+{
+  IdePerspective *perspective_a = (IdePerspective *)a;
+  IdePerspective *perspective_b = (IdePerspective *)b;
+
+  return (ide_perspective_get_priority (perspective_a) -
+          ide_perspective_get_priority (perspective_b));
+}
+
+static void
+ide_workbench_resort_perspectives (IdeWorkbench *self)
+{
+  GList *children;
+  const GList *iter;
+  gint i = 0;
+
+  g_assert (IDE_IS_WORKBENCH (self));
+
+  children = gtk_container_get_children (GTK_CONTAINER (self->perspectives_stack));
+  children = g_list_sort (children, ide_workbench_compare_perspective);
+
+  for (iter = children; iter; iter = iter->next, i++)
+    {
+      GtkWidget *child = iter->data;
+
+      gtk_container_child_set (GTK_CONTAINER (self->perspectives_stack), child,
+                               "position", i,
+                               NULL);
+    }
+
+  g_list_free (children);
+}
+
 static void
 ide_workbench_finalize (GObject *object)
 {
@@ -400,6 +435,8 @@ ide_workbench_add_perspective (IdeWorkbench   *self,
   gtk_container_add_with_properties (GTK_CONTAINER (self->titlebar_stack), titlebar,
                                      "name", id,
                                      NULL);
+
+  ide_workbench_resort_perspectives (self);
 }
 
 void