[gnome-contacts] Add support for hiding contacts

[Alexander Larsson <alexl src gnome org>]

commit caac089f11b0066bbe9dab249bfc6ece832ead4b
Author: Erick PÃrez Castellanos <erick red gmail com>
Date:   Mon Dec 19 15:30:37 2011 +0100

    Add support for hiding contacts
    
    This is useful to emulate undoable delete

 src/contacts-contact.vala |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)
---
diff --git a/src/contacts-contact.vala b/src/contacts-contact.vala
index cf1be9f..1354db0 100644
--- a/src/contacts-contact.vala
+++ b/src/contacts-contact.vala
@@ -256,12 +256,17 @@ public class Contacts.Contact : GLib.Object  {
 
   private bool _is_hidden;
   private bool _is_hidden_uptodate;
+  private bool _is_hidden_to_delete;
 
   private bool _get_is_hidden () {
     // Don't show the user itself
     if (individual.is_user)
       return true;
 
+    // Contact has been deleted (but this is not actually posted, for undo support)
+    if (_is_hidden_to_delete)
+      return true;
+
     var personas = individual.personas;
     var i = personas.iterator();
     // Look for single-persona individuals
@@ -300,6 +305,18 @@ public class Contacts.Contact : GLib.Object  {
     }
   }
 
+  public void hide () {
+    _is_hidden_to_delete = true;
+
+    queue_changed (false);
+  }
+
+  public void show () {
+    _is_hidden_to_delete = false;
+
+    queue_changed (false);
+  }
+
   public static Contact from_individual (Individual i) {
     return i.get_data ("contact");
   }