[gnome-settings-daemon] Partially revert "wacom: Remove some dead code from GsdWacomDevice"

[Carlos Garnacho <carlosg src gnome org>]

commit 3da1043cfa9843965a416f24146d5548a0a72ffc
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue Jan 20 18:09:42 2015 +0100

    Partially revert "wacom: Remove some dead code from GsdWacomDevice"
    
    This partially reverts commit f4b8633745c19e0f4dd5fe8fb36d1c974bd6a375. Some
    code turned out to be used still in gnome-control-center, which copies the
    files as-is from the g-s-d repo.

 plugins/wacom/gsd-wacom-device.c |  106 ++++++++++++++++++++++++++++++++++++++
 plugins/wacom/gsd-wacom-device.h |    2 +
 2 files changed, 108 insertions(+), 0 deletions(-)
---
diff --git a/plugins/wacom/gsd-wacom-device.c b/plugins/wacom/gsd-wacom-device.c
index 6bd9a4c..308bf6b 100644
--- a/plugins/wacom/gsd-wacom-device.c
+++ b/plugins/wacom/gsd-wacom-device.c
@@ -643,6 +643,88 @@ is_on (GnomeRROutput *output)
        return gnome_rr_crtc_get_current_mode (crtc) != NULL;
 }
 
+static GnomeRROutput *
+find_output_by_monitor (GnomeRRScreen *rr_screen,
+                       GdkScreen     *screen,
+                       int            monitor)
+{
+       GnomeRROutput **rr_outputs;
+       GnomeRROutput *ret;
+       guint i;
+
+       ret = NULL;
+
+       rr_outputs = gnome_rr_screen_list_outputs (rr_screen);
+
+       for (i = 0; rr_outputs[i] != NULL; i++) {
+               GnomeRROutput *rr_output;
+               GnomeRRCrtc *crtc;
+               int x, y;
+
+               rr_output = rr_outputs[i];
+
+               if (!is_on (rr_output))
+                       continue;
+
+               crtc = gnome_rr_output_get_crtc (rr_output);
+               if (!crtc)
+                       continue;
+
+               gnome_rr_crtc_get_position (crtc, &x, &y);
+
+               if (monitor == gdk_screen_get_monitor_at_point (screen, x, y)) {
+                       ret = rr_output;
+                       break;
+               }
+       }
+
+       if (ret == NULL)
+               g_warning ("No output found for monitor %d.", monitor);
+
+       return ret;
+}
+
+static void
+set_display_by_output (GsdWacomDevice  *device,
+                       GnomeRROutput   *rr_output)
+{
+       GSettings   *tablet;
+       GVariant    *c_array;
+       GVariant    *n_array;
+       gsize        nvalues;
+       gchar       *o_vendor, *o_product, *o_serial;
+       const gchar *values[3];
+
+       tablet  = gsd_wacom_device_get_settings (device);
+       c_array = g_settings_get_value (tablet, "display");
+       g_variant_get_strv (c_array, &nvalues);
+       if (nvalues != 3) {
+               g_warning ("Unable set set display property. Got %"G_GSIZE_FORMAT" items; expected %d 
items.\n", nvalues, 4);
+               return;
+       }
+
+       if (rr_output == NULL) {
+         o_vendor  = g_strdup ("");
+         o_product = g_strdup ("");
+         o_serial  = g_strdup ("");
+       } else {
+         gnome_rr_output_get_ids_from_edid (rr_output,
+                                            &o_vendor,
+                                            &o_product,
+                                            &o_serial);
+       }
+
+       values[0] = o_vendor;
+       values[1] = o_product;
+       values[2] = o_serial;
+       n_array = g_variant_new_strv ((const gchar * const *) &values, 3);
+       g_settings_set_value (tablet, "display", n_array);
+
+       g_free (o_vendor);
+       g_free (o_product);
+       g_free (o_serial);
+}
+
 static GsdWacomRotation
 get_rotation_wacom (GnomeRRRotation rotation)
 {
@@ -655,6 +737,30 @@ get_rotation_wacom (GnomeRRRotation rotation)
         g_assert_not_reached ();
 }
 
+void
+gsd_wacom_device_set_display (GsdWacomDevice *device,
+                              int             monitor)
+{
+       GError *error = NULL;
+       GnomeRRScreen *rr_screen;
+       GnomeRROutput *output = NULL;
+
+        g_return_if_fail (GSD_IS_WACOM_DEVICE (device));
+
+       rr_screen = gnome_rr_screen_new (gdk_screen_get_default (), &error);
+       if (rr_screen == NULL) {
+               g_warning ("Failed to create GnomeRRScreen: %s", error->message);
+               g_error_free (error);
+               return;
+       }
+
+       if (monitor > GSD_WACOM_SET_ALL_MONITORS)
+               output = find_output_by_monitor (rr_screen, gdk_screen_get_default (), monitor);
+       set_display_by_output (device, output);
+
+       g_object_unref (rr_screen);
+}
+
 static GnomeRROutput *
 find_output (GnomeRRScreen  *rr_screen,
             GsdWacomDevice *device)
diff --git a/plugins/wacom/gsd-wacom-device.h b/plugins/wacom/gsd-wacom-device.h
index 7db4b47..dd3d439 100644
--- a/plugins/wacom/gsd-wacom-device.h
+++ b/plugins/wacom/gsd-wacom-device.h
@@ -142,6 +142,8 @@ typedef enum {
 
 GType gsd_wacom_device_get_type     (void);
 
+void     gsd_wacom_device_set_display         (GsdWacomDevice    *device,
+                                               int                monitor);
 gint     gsd_wacom_device_get_display_monitor (GsdWacomDevice *device);
 GsdWacomRotation gsd_wacom_device_get_display_rotation (GsdWacomDevice *device);