[mutter/wip/tablet-protocol-v2: 42/48] wayland: Implement wp_tablet_pad.modes

[Carlos Garnacho <carlosg src gnome org>]

commit efc64f8b296bc6a1dff4974a252aa1633a35faca
Author: Carlos Garnacho <carlosg gnome org>
Date:   Fri May 13 13:55:31 2016 +0200

    wayland: Implement wp_tablet_pad.modes
    
    Lookup this information from the WacomDevice.

 src/wayland/meta-wayland-tablet-pad.c |   41 ++++++++++++++++++++++++++++++++-
 src/wayland/meta-wayland-tablet-pad.h |    3 ++
 2 files changed, 43 insertions(+), 1 deletions(-)
---
diff --git a/src/wayland/meta-wayland-tablet-pad.c b/src/wayland/meta-wayland-tablet-pad.c
index 35df7ab..bc7c5d1 100644
--- a/src/wayland/meta-wayland-tablet-pad.c
+++ b/src/wayland/meta-wayland-tablet-pad.c
@@ -29,6 +29,7 @@
 
 #include <wayland-server.h>
 #include "tablet-unstable-v2-server-protocol.h"
+#include "backends/meta-input-settings-private.h"
 
 #include "meta-surface-actor-wayland.h"
 #include "meta-wayland-private.h"
@@ -58,6 +59,39 @@ pad_handle_focus_surface_destroy (struct wl_listener *listener,
   meta_wayland_tablet_pad_set_focus (pad, NULL);
 }
 
+#ifdef HAVE_LIBWACOM
+static void
+meta_wayland_tablet_pad_fill_wacom_info (MetaWaylandTabletPad *pad)
+{
+  MetaInputSettings *input_settings;
+  WacomDevice *wacom_device;
+  gint n_modes = 0, mode_switch_button = -1;
+
+  input_settings = meta_input_settings_get ();
+  wacom_device = meta_input_settings_get_tablet_wacom_device (input_settings,
+                                                              pad->device);
+  if (!wacom_device)
+    return;
+
+  if (libwacom_get_ring_num_modes (wacom_device) > n_modes)
+    {
+      n_modes = libwacom_get_ring_num_modes (wacom_device);
+    }
+
+  if (libwacom_get_ring2_num_modes (wacom_device))
+    {
+      n_modes = libwacom_get_ring2_num_modes (wacom_device);
+    }
+
+  if (libwacom_get_strips_num_modes (wacom_device))
+    {
+      n_modes = libwacom_get_strips_num_modes (wacom_device);
+    }
+
+  pad->n_modes = n_modes;
+}
+#endif
+
 MetaWaylandTabletPad *
 meta_wayland_tablet_pad_new (ClutterInputDevice    *device,
                              MetaWaylandTabletSeat *tablet_seat)
@@ -88,6 +122,10 @@ meta_wayland_tablet_pad_new (ClutterInputDevice    *device,
                                     meta_wayland_tablet_pad_strip_new (pad));
     }
 
+#ifdef HAVE_LIBWACOM
+  meta_wayland_tablet_pad_fill_wacom_info (pad);
+#endif
+
   return pad;
 }
 
@@ -182,7 +220,8 @@ meta_wayland_tablet_pad_notify (MetaWaylandTabletPad  *pad,
       zwp_tablet_pad_v2_send_strip (resource, strip_resource);
     }
 
-  /* FIXME: zwp_tablet_pad_v2.modes */
+  if (pad->n_modes > 0)
+    zwp_tablet_pad_v2_send_modes (resource, pad->n_modes);
 
   zwp_tablet_pad_v2_send_done (resource);
 }
diff --git a/src/wayland/meta-wayland-tablet-pad.h b/src/wayland/meta-wayland-tablet-pad.h
index b416139..c3c173c 100644
--- a/src/wayland/meta-wayland-tablet-pad.h
+++ b/src/wayland/meta-wayland-tablet-pad.h
@@ -41,6 +41,9 @@ struct _MetaWaylandTabletPad
   struct wl_listener focus_surface_listener;
   uint32_t focus_serial;
 
+  uint32_t n_modes;
+  uint32_t current_mode;
+
   GList *strips;
   GList *rings;