[gnome-desktop] gnome-rr: Add dpms-mode information in debug

[Bastien Nocera <hadess src gnome org>]

commit 27ce2df1ef6f8606c082137a2132f4be535572f4
Author: Bastien Nocera <hadess hadess net>
Date:   Thu Jul 2 19:11:27 2015 +0200

    gnome-rr: Add dpms-mode information in debug
    
    When the DPMS mode changes, print the new value.

 libgnome-desktop/gnome-rr-debug.c |   30 ++++++++++++++++++++++++++++++
 1 files changed, 30 insertions(+), 0 deletions(-)
---
diff --git a/libgnome-desktop/gnome-rr-debug.c b/libgnome-desktop/gnome-rr-debug.c
index 682e721..16d841e 100644
--- a/libgnome-desktop/gnome-rr-debug.c
+++ b/libgnome-desktop/gnome-rr-debug.c
@@ -25,6 +25,25 @@
 #include <gtk/gtk.h>
 #include <libgnome-desktop/gnome-rr.h>
 
+static const char *
+dpms_mode_to_str (GnomeRRDpmsMode mode)
+{
+       switch (mode) {
+       case GNOME_RR_DPMS_ON:
+               return "on";
+       case GNOME_RR_DPMS_STANDBY:
+               return "standby";
+       case GNOME_RR_DPMS_SUSPEND:
+               return "suspend";
+       case GNOME_RR_DPMS_OFF:
+               return "off";
+       case GNOME_RR_DPMS_UNKNOWN:
+               return "unknown";
+       default:
+               g_assert_not_reached ();
+       }
+}
+
 static void
 print_output (GnomeRROutput *output, const char *message)
 {
@@ -92,6 +111,16 @@ output_connected (GnomeRRScreen *screen, GnomeRROutput *output, gpointer user_da
        print_output (output, "connected");
 }
 
+static void
+dpms_mode_changed (GnomeRRScreen *screen, GParamSpec *pspec, gpointer user_data)
+{
+       GnomeRRDpmsMode mode;
+
+       gnome_rr_screen_get_dpms_mode (screen, &mode, NULL);
+       g_print ("DPMS mode changed to: %s\n", dpms_mode_to_str (mode));
+       g_print ("\n");
+}
+
 /**
  * main:
  **/
@@ -117,6 +146,7 @@ main (int argc, char *argv[])
        g_signal_connect (screen, "changed", G_CALLBACK (screen_changed), NULL);
        g_signal_connect (screen, "output-disconnected", G_CALLBACK (output_disconnected), NULL);
        g_signal_connect (screen, "output-connected", G_CALLBACK (output_connected), NULL);
+       g_signal_connect (screen, "notify::dpms-mode", G_CALLBACK (dpms_mode_changed), NULL);
 
        gtk_main ();