[gnome-contacts] Make Contact.is_hidden a property getter and cache the value

[Alexander Larsson <alexl src gnome org>]

commit 9335c9b9bca029cdcb7a0ccd61ca0eb9427b5489
Author: Alexander Larsson <alexl redhat com>
Date:   Tue Nov 29 11:40:29 2011 +0100

    Make Contact.is_hidden a property getter and cache the value
    
    Its already semi-expensive to calculate and we're gonna add more stuff

 src/contacts-contact.vala |   17 ++++++++++++++++-
 src/contacts-store.vala   |    2 +-
 src/contacts-view.vala    |    2 +-
 3 files changed, 18 insertions(+), 3 deletions(-)
---
diff --git a/src/contacts-contact.vala b/src/contacts-contact.vala
index 82693bd..fd9dcc0 100644
--- a/src/contacts-contact.vala
+++ b/src/contacts-contact.vala
@@ -253,7 +253,10 @@ public class Contacts.Contact : GLib.Object  {
 
   public signal void changed ();
 
-  public bool is_hidden () {
+  private bool _is_hidden;
+  private bool _is_hidden_uptodate;
+
+  private bool _get_is_hidden () {
     // Don't show the user itself
     if (individual.is_user)
       return true;
@@ -278,6 +281,16 @@ public class Contacts.Contact : GLib.Object  {
     return false;
   }
 
+  public bool is_hidden {
+    get {
+      if (!_is_hidden_uptodate) {
+	_is_hidden = _get_is_hidden ();
+	_is_hidden_uptodate = true;
+      }
+      return _is_hidden;
+    }
+  }
+
   public static Contact from_individual (Individual i) {
     return i.get_data ("contact");
   }
@@ -717,6 +730,8 @@ public class Contacts.Contact : GLib.Object  {
   }
 
   private void queue_changed () {
+    _is_hidden_uptodate = false;
+
     if (changed_id != 0)
       return;
 
diff --git a/src/contacts-store.vala b/src/contacts-store.vala
index f82ab35..53699f8 100644
--- a/src/contacts-store.vala
+++ b/src/contacts-store.vala
@@ -190,7 +190,7 @@ public class Contacts.Store : GLib.Object {
 
   public bool is_empty () {
     foreach (var contact in contacts) {
-      if (!contact.is_hidden ())
+      if (!contact.is_hidden)
 	return false;
     }
     return true;
diff --git a/src/contacts-view.vala b/src/contacts-view.vala
index 20c7bbe..d56fd0e 100644
--- a/src/contacts-view.vala
+++ b/src/contacts-view.vala
@@ -113,7 +113,7 @@ public class Contacts.View : GLib.Object {
   public TreeModel model { get { return list_store; } }
 
   private bool apply_filter (Contact contact) {
-    if (contact.is_hidden ())
+    if (contact.is_hidden)
       return false;
 
     if (contact in hidden_contacts)