Merge lp:~donadigo/pantheon-greeter/switch-to-user into lp:~elementary-pantheon/pantheon-greeter/trunk

[Adam Bieńkowski]

* Handle SwitchToUser calls.

The branch fixes current problem with org.freedesktop.DisplayManager.Seat.SwitchToUser calls which are currently not handled at all. It is needed to e.g implement switching users from session indicator (https://bugs.launchpad.net/wingpanel-indicator-session/+bug/1508584).

[lp:~donadigo/pantheon-greeter/switch-to-user]

403. By Adam Bieńkowski on 2015-10-24

Array optimization

404. By Adam Bieńkowski on 2015-10-24

Removed unneded last_user variable

[Felipe Escoto (philip.scott)]

review: Approve

=== modified file 'src/Authenticator.vala'
--- src/Authenticator.vala	2015-04-22 21:10:35 +0000
+++ src/Authenticator.vala	2015-10-24 14:26:12 +0000
@@ -81,6 +81,7 @@
     public abstract bool show_manual_login { get; }
     public abstract bool lock { get; }
     public abstract string default_session { get; }
+    public abstract string? select_user { get; }
 
     /**
      * Starts the login-procedure for the passed
@@ -161,6 +162,11 @@
             return lightdm.default_session_hint;
         }
     }
+    public string? select_user { 
+        get {
+            return lightdm.select_user_hint;
+        }
+    }
 
     public LightDMGateway () {
         message ("Connecting to LightDM...");
@@ -285,6 +291,7 @@
     public bool show_manual_login { get { return true; } }
     public bool lock { get {return false; } }
     public string default_session { get { return ""; } }
+    public string? select_user { get { return null; } }
 
     LoginMask last_login_mask;
 
 
=== modified file 'src/PantheonGreeter.vala'
--- src/PantheonGreeter.vala	2015-10-22 15:31:03 +0000
+++ src/PantheonGreeter.vala	2015-10-24 14:26:12 +0000
@@ -219,19 +219,16 @@
         greeterbox.set_opacity (255);
         greeterbox.restore_easing_state ();
 
-        message ("Selecting last used user...");
-
-        var last_user = get_greeter_state ("last-user");
-
-        if (last_user == null) {
-            warning ("last user not set");
-        } else {
+        var select_user = login_gateway.select_user;
+        var switch_to_user = (select_user != null) ? select_user : get_greeter_state ("last-user");
+
+        if (switch_to_user != null) {
             for (var i = 0; i < userlist.size; i++) {
-                if (userlist.get_user (i).name == last_user) {
+                if (userlist.get_user (i).name == switch_to_user) {
                     userlist.current_user = userlist.get_user (i);
                     break;
                 }
-            }
+            }            
         }
 
         if (userlist.current_user == null)