[gnome-builder] layout: update current stack when focus changes

[Christian Hergert <chergert src gnome org>]

commit 6557d419383a3ea3f13d75b754c40520ce0b6772
Author: Christian Hergert <chergert redhat com>
Date:   Thu Jul 20 17:50:10 2017 -0700

    layout: update current stack when focus changes
    
    We already do focus tracking in the layout grid, so we can use
    that same tracking to update the current stack within the
    grid column.

 libide/layout/ide-layout-grid.c |   13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletions(-)
---
diff --git a/libide/layout/ide-layout-grid.c b/libide/layout/ide-layout-grid.c
index 707e7a6..719d531 100644
--- a/libide/layout/ide-layout-grid.c
+++ b/libide/layout/ide-layout-grid.c
@@ -162,11 +162,12 @@ ide_layout_grid_after_set_focus (IdeLayoutGrid *self,
 
   if (widget != NULL)
     {
+      GtkWidget *column = NULL;
       GtkWidget *view;
 
       if (gtk_widget_is_ancestor (widget, GTK_WIDGET (self)))
         {
-          GtkWidget *column = gtk_widget_get_ancestor (widget, IDE_TYPE_LAYOUT_GRID_COLUMN);
+          column = gtk_widget_get_ancestor (widget, IDE_TYPE_LAYOUT_GRID_COLUMN);
 
           if (column != NULL)
             ide_layout_grid_set_current_column (self, IDE_LAYOUT_GRID_COLUMN (column));
@@ -181,6 +182,16 @@ ide_layout_grid_after_set_focus (IdeLayoutGrid *self,
         {
           priv->_last_focused_view = (IdeLayoutView *)view;
           ide_object_notify_in_main (self, properties [PROP_CURRENT_VIEW]);
+
+          if (view != NULL && column != NULL)
+            {
+              GtkWidget *stack;
+
+              stack = gtk_widget_get_ancestor (GTK_WIDGET (view), IDE_TYPE_LAYOUT_STACK);
+              if (stack != NULL)
+                ide_layout_grid_column_set_current_stack (IDE_LAYOUT_GRID_COLUMN (column),
+                                                          IDE_LAYOUT_STACK (stack));
+            }
         }
     }
 }