[gnome-contacts/wip/sorted] Fix up ctrl up/down inside scrolled window

[Alexander Larsson <alexl src gnome org>]

commit 01df16164a138d13ec7ae8bbe20d1c84221c550a
Author: Alexander Larsson <alexl redhat com>
Date:   Mon May 14 12:18:40 2012 +0200

    Fix up ctrl up/down inside scrolled window

 src/contacts-sorted.vala |   30 ++++++++++++++++++++++++++++++
 1 files changed, 30 insertions(+), 0 deletions(-)
---
diff --git a/src/contacts-sorted.vala b/src/contacts-sorted.vala
index fa2b83c..3d5e25e 100644
--- a/src/contacts-sorted.vala
+++ b/src/contacts-sorted.vala
@@ -126,12 +126,32 @@ public class Contacts.Sorted : Container {
 	child = get_last_visible ();
       break;
     case MovementStep.DISPLAY_LINES:
+      if (cursor_child != null) {
+	SequenceIter<ChildInfo?>? iter = cursor_child.iter;
+
+	while (count < 0 && iter != null) {
+	  iter = get_previous_visible (iter);
+	  count++;
+	}
+	while (count > 0 && iter != null) {
+	  iter = get_next_visible (iter);
+	  count--;
+	}
+	if (iter != null && !iter.is_end ()) {
+	  child = iter.get ();
+	}
+      }
 
       break;
     default:
       return;
     }
 
+    if (child == null) {
+      error_bell ();
+      return;
+    }
+
     update_cursor (child);
     if (!modify_selection_pressed)
       update_selected (child);
@@ -168,6 +188,16 @@ public class Contacts.Sorted : Container {
     add_move_binding (binding_set, Gdk.Key.KP_End, 0,
 		      MovementStep.BUFFER_ENDS, 1);
 
+    add_move_binding (binding_set, Gdk.Key.Up, Gdk.ModifierType.CONTROL_MASK,
+		      MovementStep.DISPLAY_LINES, -1);
+    add_move_binding (binding_set, Gdk.Key.KP_Up, Gdk.ModifierType.CONTROL_MASK,
+		      MovementStep.DISPLAY_LINES, -1);
+
+    add_move_binding (binding_set, Gdk.Key.Down, Gdk.ModifierType.CONTROL_MASK,
+		      MovementStep.DISPLAY_LINES, 1);
+    add_move_binding (binding_set, Gdk.Key.KP_Down, Gdk.ModifierType.CONTROL_MASK,
+		      MovementStep.DISPLAY_LINES, 1);
+
     /* TODO: Add PgUp/PgDown */
 
     BindingEntry.add_signal (binding_set, Gdk.Key.space, Gdk.ModifierType.CONTROL_MASK,