[mutter] backend: Set mapping-mode on X11 pen/eraser devices

[Carlos Garnacho <carlosg src gnome org>]

commit 10b30eaba5e215efbcc07ae3b7660fa934381661
Author: Carlos Garnacho <carlosg gnome org>
Date:   Fri Jun 30 12:19:25 2017 +0200

    backend: Set mapping-mode on X11 pen/eraser devices
    
    And use it in the generic code for the checks about whether mapping to
    an specific display applies or not.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=784402

 src/backends/meta-input-settings.c         |    2 +-
 src/backends/x11/meta-input-settings-x11.c |    9 +++++++++
 2 files changed, 10 insertions(+), 1 deletions(-)
---
diff --git a/src/backends/meta-input-settings.c b/src/backends/meta-input-settings.c
index c55debe..ac4bddb 100644
--- a/src/backends/meta-input-settings.c
+++ b/src/backends/meta-input-settings.c
@@ -857,7 +857,7 @@ update_device_display (MetaInputSettings  *input_settings,
   input_settings_class = META_INPUT_SETTINGS_GET_CLASS (input_settings);
 
   /* If mapping is relative, the device can move on all displays */
-  if (clutter_input_device_get_device_type (device) != CLUTTER_TABLET_DEVICE ||
+  if (clutter_input_device_get_device_type (device) == CLUTTER_TOUCHSCREEN_DEVICE ||
       clutter_input_device_get_mapping_mode (device) ==
       CLUTTER_INPUT_DEVICE_MAPPING_ABSOLUTE)
     logical_monitor = meta_input_settings_find_logical_monitor (input_settings,
diff --git a/src/backends/x11/meta-input-settings-x11.c b/src/backends/x11/meta-input-settings-x11.c
index 894e4bb..636f98a 100644
--- a/src/backends/x11/meta-input-settings-x11.c
+++ b/src/backends/x11/meta-input-settings-x11.c
@@ -551,6 +551,15 @@ meta_input_settings_x11_set_tablet_mapping (MetaInputSettings     *settings,
       g_warning ("Could not set tablet mapping for %s",
                  clutter_input_device_get_device_name (device));
     }
+  else
+    {
+      ClutterInputDeviceMapping dev_mapping;
+
+      dev_mapping = (mapping == G_DESKTOP_TABLET_MAPPING_ABSOLUTE) ?
+        CLUTTER_INPUT_DEVICE_MAPPING_ABSOLUTE :
+        CLUTTER_INPUT_DEVICE_MAPPING_RELATIVE;
+      clutter_input_device_set_mapping_mode (device, dev_mapping);
+    }
 }
 
 static gboolean