[gnome-settings-daemon] wacom: Add _get_area() helper needed by g-c-c

[Bastien Nocera <hadess src gnome org>]

commit 7675bffde2fb0e0f25d41d3f30748809353e128a
Author: Bastien Nocera <hadess hadess net>
Date:   Tue Jan 10 19:56:26 2012 +0000

    wacom: Add _get_area() helper needed by g-c-c

 plugins/wacom/gsd-wacom-device.c |   40 ++++++++++++++++++++++++++++++++++++++
 plugins/wacom/gsd-wacom-device.h |    3 +-
 2 files changed, 42 insertions(+), 1 deletions(-)
---
diff --git a/plugins/wacom/gsd-wacom-device.c b/plugins/wacom/gsd-wacom-device.c
index 2f364b0..d28ac8c 100644
--- a/plugins/wacom/gsd-wacom-device.c
+++ b/plugins/wacom/gsd-wacom-device.c
@@ -734,6 +734,46 @@ gsd_wacom_device_get_device_type (GsdWacomDevice *device)
 	return device->priv->type;
 }
 
+gint *
+gsd_wacom_device_get_area (GsdWacomDevice *device)
+{
+	int i, id;
+	XDevice *xdevice;
+	Atom area, realtype;
+	int rc, realformat;
+	unsigned long nitems, bytes_after;
+	unsigned char *data = NULL;
+	gint *device_area;
+
+	g_object_get (device->priv->gdk_device, "device-id", &id, NULL);
+
+	area = XInternAtom (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()), "Wacom Tablet Area", False);
+
+	gdk_error_trap_push ();
+	xdevice = XOpenDevice (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()), id);
+	if (gdk_error_trap_pop () || (device == NULL))
+		return NULL;
+
+	gdk_error_trap_push ();
+	rc = XGetDeviceProperty (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()),
+				 xdevice, area, 0, 4, False,
+				 XA_INTEGER, &realtype, &realformat, &nitems,
+				 &bytes_after, &data);
+	if (gdk_error_trap_pop () || rc != Success || realtype == None || bytes_after != 0 || nitems != 4) {
+		XCloseDevice (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()), xdevice);
+		return NULL;
+	}
+
+	device_area = g_new0 (int, nitems);
+	for (i = 0; i < nitems; i++)
+		device_area[i] = ((long*)data)[i];
+
+	XFree (data);
+	XCloseDevice (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()), xdevice);
+
+	return device_area;
+}
+
 const char *
 gsd_wacom_device_type_to_string (GsdWacomDeviceType type)
 {
diff --git a/plugins/wacom/gsd-wacom-device.h b/plugins/wacom/gsd-wacom-device.h
index 235e75a..2502cb1 100644
--- a/plugins/wacom/gsd-wacom-device.h
+++ b/plugins/wacom/gsd-wacom-device.h
@@ -96,7 +96,8 @@ void             gsd_wacom_device_set_current_stylus (GsdWacomDevice *device,
 						      int             stylus_id);
 
 GsdWacomDeviceType gsd_wacom_device_get_device_type (GsdWacomDevice *device);
-const char     * gsd_wacom_device_type_to_string   (GsdWacomDeviceType type);
+gint           * gsd_wacom_device_get_area          (GsdWacomDevice *device);
+const char     * gsd_wacom_device_type_to_string    (GsdWacomDeviceType type);
 
 /* Helper and debug functions */
 GsdWacomDevice * gsd_wacom_device_create_fake (GsdWacomDeviceType  type,