[gnome-boxes] display: Allow connecting through FD

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit af7f8766039c83e992e91723def9a513c939491d
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Wed Nov 19 00:55:00 2014 +0000

    display: Allow connecting through FD
    
    Implementation classes can now support connecting through a file
    descriptor.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=738573

 src/display.vala       |    4 +++-
 src/spice-display.vala |    2 +-
 src/vnc-display.vala   |    2 +-
 3 files changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/src/display.vala b/src/display.vala
index 0f168c4..fe90632 100644
--- a/src/display.vala
+++ b/src/display.vala
@@ -20,6 +20,8 @@ private abstract class Boxes.Display: GLib.Object, Boxes.IPropertiesProvider {
     public signal void disconnected (bool connection_failed);
     public signal void got_error (string message);
 
+    public delegate int OpenFDFunc ();
+
     public abstract Gtk.Widget get_display (int n);
     public abstract Gdk.Pixbuf? get_pixbuf (int n) throws Boxes.Error;
     public abstract void set_enable_inputs (Gtk.Widget widget, bool enable);
@@ -29,7 +31,7 @@ private abstract class Boxes.Display: GLib.Object, Boxes.IPropertiesProvider {
         return false;
     }
 
-    public abstract void connect_it () throws GLib.Error;
+    public abstract void connect_it (OpenFDFunc? open_fd = null) throws GLib.Error;
     public abstract void disconnect_it ();
 
     public virtual void collect_logs (StringBuilder builder) {
diff --git a/src/spice-display.vala b/src/spice-display.vala
index c3eb5e1..1872e56 100644
--- a/src/spice-display.vala
+++ b/src/spice-display.vala
@@ -191,7 +191,7 @@ private class Boxes.SpiceDisplay: Boxes.Display {
         }
     }
 
-    public override void connect_it () {
+    public override void connect_it (Display.OpenFDFunc? open_fd = null) {
         // We only initiate connection once
         if (connected)
             return;
diff --git a/src/vnc-display.vala b/src/vnc-display.vala
index b95ea04..8eae5b8 100644
--- a/src/vnc-display.vala
+++ b/src/vnc-display.vala
@@ -114,7 +114,7 @@ private class Boxes.VncDisplay: Boxes.Display {
         return display.get_pixbuf ();
     }
 
-    public override void connect_it () throws GLib.Error {
+    public override void connect_it (Display.OpenFDFunc? open_fd = null) throws GLib.Error {
         // We only initiate connection once
         if (connected)
             return;