wayland: Add MetaWaylandTabletManager

This struct keeps the server side information for the wl_tablet_manager
global resource. It keeps the clients requesting this interface, and
does keep track of the plugged tablet devices, so
wl_tablet_manager.device_added is emitted on the expected clients.

src/Makefile.am

@@ -296,6 +296,8 @@ libmutter_la_SOURCES +=				\
 	wayland/meta-wayland-seat.h		\
 	wayland/meta-wayland-tablet.c		\
 	wayland/meta-wayland-tablet.h		\
+	wayland/meta-wayland-tablet-manager.c	\
+	wayland/meta-wayland-tablet-manager.h	\
 	wayland/meta-wayland-tablet-seat.c	\
 	wayland/meta-wayland-tablet-seat.h	\
 	wayland/meta-wayland-tablet-tool.c	\

src/wayland/meta-wayland-private.h

@@ -33,6 +33,7 @@
 #include "meta-wayland-surface.h"
 #include "meta-wayland-seat.h"
 #include "meta-wayland-pointer-gestures.h"
+#include "meta-wayland-tablet-manager.h"
 
 typedef struct _MetaXWaylandSelection MetaXWaylandSelection;
 
@@ -69,6 +70,7 @@ struct _MetaWaylandCompositor
   MetaXWaylandManager xwayland_manager;
 
   MetaWaylandSeat *seat;
+  MetaWaylandTabletManager *tablet_manager;
 };
 
 #endif /* META_WAYLAND_PRIVATE_H */

src/wayland/meta-wayland-tablet-manager.c

@@ -0,0 +1,239 @@
+/*
+ * Wayland Support
+ *
+ * Copyright (C) 2015 Red Hat
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Author: Carlos Garnacho <carlosg@gnome.org>
+ */
+
+#define _GNU_SOURCE
+
+#include "config.h"
+
+#include <glib.h>
+
+#include <wayland-server.h>
+#include "tablet-unstable-v1-server-protocol.h"
+
+#include "meta-wayland-private.h"
+#include "meta-wayland-tablet-manager.h"
+#include "meta-wayland-tablet-seat.h"
+
+static void
+unbind_resource (struct wl_resource *resource)
+{
+  wl_list_remove (wl_resource_get_link (resource));
+}
+
+static gboolean
+is_tablet_device (ClutterInputDevice *device)
+{
+  ClutterInputDeviceType device_type;
+
+  if (clutter_input_device_get_device_mode (device) == CLUTTER_INPUT_MODE_MASTER)
+    return FALSE;
+
+  device_type = clutter_input_device_get_device_type (device);
+
+  return (device_type == CLUTTER_TABLET_DEVICE ||
+          device_type == CLUTTER_PEN_DEVICE ||
+          device_type == CLUTTER_ERASER_DEVICE ||
+          device_type == CLUTTER_CURSOR_DEVICE);
+}
+
+static void
+tablet_manager_get_tablet_seat (struct wl_client   *client,
+                                struct wl_resource *resource,
+                                guint32             id,
+                                struct wl_resource *seat_resource)
+{
+  MetaWaylandTabletManager *tablet_manager = wl_resource_get_user_data (resource);
+  MetaWaylandSeat *seat = wl_resource_get_user_data (seat_resource);
+  MetaWaylandTabletSeat *tablet_seat;
+
+  tablet_seat = meta_wayland_tablet_manager_ensure_seat (tablet_manager, seat);
+  meta_wayland_tablet_seat_create_new_resource (tablet_seat, client,
+                                                resource, id);
+}
+
+static void
+tablet_manager_destroy (struct wl_client   *client,
+                        struct wl_resource *resource)
+{
+  wl_resource_destroy (resource);
+}
+
+static const struct zwp_tablet_manager_v1_interface tablet_manager_interface = {
+  tablet_manager_get_tablet_seat,
+  tablet_manager_destroy
+};
+
+static void
+bind_tablet_manager (struct wl_client *client,
+                     void             *data,
+                     uint32_t          version,
+                     uint32_t          id)
+{
+  MetaWaylandCompositor *compositor = data;
+  MetaWaylandTabletManager *tablet_manager = compositor->tablet_manager;
+  struct wl_resource *resource;
+
+  resource = wl_resource_create (client, &zwp_tablet_manager_v1_interface,
+                                 MIN (version, 1), id);
+  wl_resource_set_implementation (resource, &tablet_manager_interface,
+                                  tablet_manager, unbind_resource);
+  wl_resource_set_user_data (resource, tablet_manager);
+  wl_list_insert (&tablet_manager->resource_list,
+                  wl_resource_get_link (resource));
+}
+
+static MetaWaylandTabletManager *
+meta_wayland_tablet_manager_new (MetaWaylandCompositor *compositor)
+{
+  MetaWaylandTabletManager *tablet_manager;
+
+  tablet_manager = g_slice_new0 (MetaWaylandTabletManager);
+  tablet_manager->compositor = compositor;
+  tablet_manager->wl_display = compositor->wayland_display;
+  tablet_manager->seats = g_hash_table_new_full (NULL, NULL, NULL,
+                                                 (GDestroyNotify) meta_wayland_tablet_seat_free);
+  wl_list_init (&tablet_manager->resource_list);
+
+  wl_global_create (tablet_manager->wl_display,
+                    &zwp_tablet_manager_v1_interface, 1,
+                    compositor, bind_tablet_manager);
+
+  return tablet_manager;
+}
+
+void
+meta_wayland_tablet_manager_init (MetaWaylandCompositor *compositor)
+{
+  compositor->tablet_manager = meta_wayland_tablet_manager_new (compositor);
+}
+
+void
+meta_wayland_tablet_manager_free (MetaWaylandTabletManager *tablet_manager)
+{
+  ClutterDeviceManager *device_manager;
+
+  device_manager = clutter_device_manager_get_default ();
+  g_signal_handlers_disconnect_by_data (device_manager, tablet_manager);
+
+  g_hash_table_destroy (tablet_manager->seats);
+  g_slice_free (MetaWaylandTabletManager, tablet_manager);
+}
+
+static MetaWaylandTabletSeat *
+meta_wayland_tablet_manager_lookup_seat (MetaWaylandTabletManager *manager,
+                                         ClutterInputDevice       *device)
+{
+  MetaWaylandTabletSeat *tablet_seat;
+  MetaWaylandSeat *seat;
+  GHashTableIter iter;
+
+  if (!is_tablet_device (device))
+    return NULL;
+
+  g_hash_table_iter_init (&iter, manager->seats);
+
+  while (g_hash_table_iter_next (&iter, (gpointer*) &seat, (gpointer*) &tablet_seat))
+    {
+      if (meta_wayland_tablet_seat_lookup_tablet (tablet_seat, device))
+        return tablet_seat;
+    }
+
+  return NULL;
+}
+
+gboolean
+meta_wayland_tablet_manager_consumes_event (MetaWaylandTabletManager *manager,
+                                            const ClutterEvent       *event)
+{
+  ClutterInputDevice *device = clutter_event_get_source_device (event);
+
+  return meta_wayland_tablet_manager_lookup_seat (manager, device) != NULL;
+}
+
+void
+meta_wayland_tablet_manager_update (MetaWaylandTabletManager *manager,
+                                    const ClutterEvent       *event)
+{
+  ClutterInputDevice *device = clutter_event_get_source_device (event);
+  MetaWaylandTabletSeat *tablet_seat;
+
+  tablet_seat = meta_wayland_tablet_manager_lookup_seat (manager, device);
+
+  if (!tablet_seat)
+    return;
+
+  switch (event->type)
+    {
+    case CLUTTER_PROXIMITY_IN:
+    case CLUTTER_PROXIMITY_OUT:
+    case CLUTTER_BUTTON_PRESS:
+    case CLUTTER_BUTTON_RELEASE:
+    case CLUTTER_MOTION:
+      meta_wayland_tablet_seat_update (tablet_seat, event);
+      break;
+    default:
+      break;
+    }
+}
+
+gboolean
+meta_wayland_tablet_manager_handle_event (MetaWaylandTabletManager *manager,
+                                          const ClutterEvent       *event)
+{
+  ClutterInputDevice *device = clutter_event_get_source_device (event);
+  MetaWaylandTabletSeat *tablet_seat;
+
+  tablet_seat = meta_wayland_tablet_manager_lookup_seat (manager, device);
+
+  if (!tablet_seat)
+    return CLUTTER_EVENT_PROPAGATE;
+
+  switch (event->type)
+    {
+    case CLUTTER_PROXIMITY_IN:
+    case CLUTTER_PROXIMITY_OUT:
+    case CLUTTER_BUTTON_PRESS:
+    case CLUTTER_BUTTON_RELEASE:
+    case CLUTTER_MOTION:
+      return meta_wayland_tablet_seat_handle_event (tablet_seat, event);
+    default:
+      return CLUTTER_EVENT_PROPAGATE;
+    }
+}
+
+MetaWaylandTabletSeat *
+meta_wayland_tablet_manager_ensure_seat (MetaWaylandTabletManager *manager,
+                                         MetaWaylandSeat          *seat)
+{
+  MetaWaylandTabletSeat *tablet_seat;
+
+  tablet_seat = g_hash_table_lookup (manager->seats, seat);
+
+  if (!tablet_seat)
+    {
+      tablet_seat = meta_wayland_tablet_seat_new (manager);
+      g_hash_table_insert (manager->seats, seat, tablet_seat);
+    }
+
+  return tablet_seat;
+}

src/wayland/meta-wayland-tablet-manager.h

@@ -0,0 +1,54 @@
+/*
+ * Wayland Support
+ *
+ * Copyright (C) 2015 Red Hat
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author: Carlos Garnacho <carlosg@gnome.org>
+ */
+
+#ifndef META_WAYLAND_TABLET_MANAGER_H
+#define META_WAYLAND_TABLET_MANAGER_H
+
+#include <wayland-server.h>
+
+#include <glib.h>
+
+#include "meta-wayland-types.h"
+
+struct _MetaWaylandTabletManager
+{
+  MetaWaylandCompositor *compositor;
+  struct wl_display *wl_display;
+  struct wl_list resource_list;
+
+  GHashTable *seats;
+};
+
+void     meta_wayland_tablet_manager_init (MetaWaylandCompositor    *compositor);
+void     meta_wayland_tablet_manager_free (MetaWaylandTabletManager *tablet_manager);
+
+gboolean meta_wayland_tablet_manager_consumes_event (MetaWaylandTabletManager *manager,
+                                                     const ClutterEvent       *event);
+void     meta_wayland_tablet_manager_update         (MetaWaylandTabletManager *manager,
+                                                     const ClutterEvent       *event);
+gboolean meta_wayland_tablet_manager_handle_event   (MetaWaylandTabletManager *manager,
+                                                     const ClutterEvent       *event);
+
+MetaWaylandTabletSeat *
+         meta_wayland_tablet_manager_ensure_seat    (MetaWaylandTabletManager *manager,
+                                                     MetaWaylandSeat          *seat);
+
+#endif /* META_WAYLAND_TABLET_MANAGER_H */