[mutter/wip/tablet-protocol: 39/50] wayland: Add MetaWaylandTabletManager

[Carlos Garnacho <carlosg src gnome org>]

commit 62f9d4d3c162b89a1aca5a6b76f6cf8774c5b7bb
Author: Carlos Garnacho <carlosg gnome org>
Date:   Fri Jan 9 17:23:17 2015 +0100

    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                           |    2 +
 src/wayland/meta-wayland-private.h        |    2 +
 src/wayland/meta-wayland-tablet-manager.c |  251 +++++++++++++++++++++++++++++
 src/wayland/meta-wayland-tablet-manager.h |   50 ++++++
 src/wayland/meta-wayland-types.h          |    1 +
 5 files changed, 306 insertions(+), 0 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index 80198b7..c086297 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -262,6 +262,8 @@ 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-touch.c            \
        wayland/meta-wayland-touch.h            \
        wayland/meta-wayland-surface.c          \
diff --git a/src/wayland/meta-wayland-private.h b/src/wayland/meta-wayland-private.h
index c93fcf2..9a9558b 100644
--- a/src/wayland/meta-wayland-private.h
+++ b/src/wayland/meta-wayland-private.h
@@ -32,6 +32,7 @@
 #include "meta-wayland-versions.h"
 #include "meta-wayland-surface.h"
 #include "meta-wayland-seat.h"
+#include "meta-wayland-tablet-manager.h"
 
 typedef struct _MetaXWaylandSelection MetaXWaylandSelection;
 
@@ -68,6 +69,7 @@ struct _MetaWaylandCompositor
   MetaXWaylandManager xwayland_manager;
 
   MetaWaylandSeat *seat;
+  MetaWaylandTabletManager *tablet_manager;
 };
 
 #endif /* META_WAYLAND_PRIVATE_H */
diff --git a/src/wayland/meta-wayland-tablet-manager.c b/src/wayland/meta-wayland-tablet-manager.c
new file mode 100644
index 0000000..6340023
--- /dev/null
+++ b/src/wayland/meta-wayland-tablet-manager.c
@@ -0,0 +1,251 @@
+/*
+ * 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 "wayland-tablet-server-protocol.h"
+
+#include "meta-wayland-private.h"
+#include "meta-wayland-tablet-manager.h"
+#include "meta-wayland-tablet.h"
+
+static void
+unbind_resource (struct wl_resource *resource)
+{
+  wl_list_remove (wl_resource_get_link (resource));
+}
+
+static void
+notify_tablet_added (MetaWaylandTabletManager *manager,
+                     struct wl_resource       *client_resource,
+                     ClutterInputDevice       *device)
+{
+  struct wl_resource *resource;
+  MetaWaylandTablet *tablet;
+  struct wl_client *client;
+  guint vid, pid;
+
+  if (sscanf (clutter_input_device_get_vendor_id (device), "%x", &vid) != 1 ||
+      sscanf (clutter_input_device_get_product_id (device), "%x", &pid) != 1)
+    return;
+
+  tablet = g_hash_table_lookup (manager->tablets, device);
+
+  if (!tablet)
+    return;
+
+  client = wl_resource_get_client (client_resource);
+
+  if (meta_wayland_tablet_lookup_resource (tablet, client))
+    return;
+
+  resource = meta_wayland_tablet_create_new_resource (tablet, client,
+                                                      client_resource, 0);
+  if (!resource)
+    return;
+
+  wl_tablet_manager_send_device_added (client_resource, resource,
+                                       clutter_input_device_get_device_name (device),
+                                       vid, pid, 0);
+}
+
+static void
+broadcast_tablet_added (MetaWaylandTabletManager *manager,
+                        ClutterInputDevice       *device)
+{
+  struct wl_resource *resource;
+
+  wl_resource_for_each(resource, &manager->resource_list)
+    {
+      notify_tablet_added (manager, resource, device);
+    }
+}
+
+static void
+notify_tablets (MetaWaylandTabletManager *manager,
+                struct wl_resource       *client_resource)
+{
+  ClutterInputDevice *device;
+  GHashTableIter iter;
+
+  g_hash_table_iter_init (&iter, manager->tablets);
+
+  while (g_hash_table_iter_next (&iter, (gpointer *) &device, NULL))
+    notify_tablet_added (manager, client_resource, device);
+}
+
+static void
+meta_wayland_tablet_manager_device_added (MetaWaylandTabletManager *manager,
+                                          ClutterInputDevice       *device)
+{
+  ClutterInputDeviceType device_type;
+
+  if (clutter_input_device_get_device_mode (device) == CLUTTER_INPUT_MODE_MASTER)
+    return;
+
+  device_type = clutter_input_device_get_device_type (device);
+
+  if (device_type == CLUTTER_TABLET_DEVICE || device_type == CLUTTER_PEN_DEVICE ||
+      device_type == CLUTTER_ERASER_DEVICE || device_type == CLUTTER_CURSOR_DEVICE)
+    {
+      MetaWaylandTablet *tablet;
+
+      tablet = meta_wayland_tablet_new (device, manager);
+      g_hash_table_insert (manager->tablets, device, tablet);
+      broadcast_tablet_added (manager, device);
+    }
+}
+
+static void
+meta_wayland_tablet_manager_device_removed (MetaWaylandTabletManager *manager,
+                                            ClutterInputDevice       *device)
+{
+  if (g_hash_table_lookup (manager->tablets, device))
+    g_hash_table_remove (manager->tablets, device);
+}
+
+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 *seat_resource =
+    wl_resource_find_for_client (&compositor->seat->base_resource_list, client);
+  struct wl_resource *resource;
+
+  resource = wl_resource_create (client, &wl_tablet_manager_interface,
+                                 MIN (version, 1), id);
+  wl_resource_set_implementation (resource, NULL, tablet_manager, unbind_resource);
+  wl_resource_set_user_data (resource, tablet_manager);
+  wl_list_insert(&tablet_manager->resource_list,
+                 wl_resource_get_link (resource));
+
+  /* Notify the client of the wl_seat object we're associated with */
+  wl_tablet_manager_send_seat (resource, seat_resource);
+
+  /* Notify client of all available tablets */
+  notify_tablets (tablet_manager, resource);
+}
+
+static MetaWaylandTabletManager *
+meta_wayland_tablet_manager_new (MetaWaylandCompositor *compositor)
+{
+  MetaWaylandTabletManager *tablet_manager;
+  ClutterDeviceManager *device_manager;
+  const GSList *devices, *l;
+
+  tablet_manager = g_slice_new0 (MetaWaylandTabletManager);
+  tablet_manager->compositor = compositor;
+  tablet_manager->wl_display = compositor->wayland_display;
+  tablet_manager->tablets = g_hash_table_new_full (NULL, NULL, NULL,
+                                                   (GDestroyNotify) meta_wayland_tablet_free);
+  wl_list_init (&tablet_manager->resource_list);
+
+  device_manager = clutter_device_manager_get_default ();
+  g_signal_connect_swapped (device_manager, "device-added",
+                            G_CALLBACK (meta_wayland_tablet_manager_device_added),
+                            tablet_manager);
+  g_signal_connect_swapped (device_manager, "device-removed",
+                            G_CALLBACK (meta_wayland_tablet_manager_device_removed),
+                            tablet_manager);
+
+  devices = clutter_device_manager_peek_devices (device_manager);
+
+  for (l = devices; l; l = l->next)
+    meta_wayland_tablet_manager_device_added (tablet_manager, l->data);
+
+  wl_global_create (tablet_manager->wl_display,
+                    &wl_tablet_manager_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->tablets);
+  g_slice_free (MetaWaylandTabletManager, tablet_manager);
+}
+
+static MetaWaylandTablet *
+meta_wayland_tablet_manager_lookup_from_event (MetaWaylandTabletManager *manager,
+                                               const ClutterEvent       *event)
+{
+  ClutterInputDevice *device;
+
+  device = clutter_event_get_source_device (event);
+  return g_hash_table_lookup (manager->tablets, device);
+}
+
+gboolean
+meta_wayland_tablet_manager_consumes_event (MetaWaylandTabletManager *manager,
+                                            const ClutterEvent       *event)
+{
+  return meta_wayland_tablet_manager_lookup_from_event (manager, event) != NULL;
+}
+
+void
+meta_wayland_tablet_manager_update (MetaWaylandTabletManager *manager,
+                                    const ClutterEvent       *event)
+{
+  MetaWaylandTablet *tablet;
+
+  tablet = meta_wayland_tablet_manager_lookup_from_event (manager, event);
+
+  if (tablet)
+    meta_wayland_tablet_update (tablet, event);
+}
+
+gboolean
+meta_wayland_tablet_manager_handle_event (MetaWaylandTabletManager *manager,
+                                          const ClutterEvent       *event)
+{
+  MetaWaylandTablet *tablet;
+
+  tablet = meta_wayland_tablet_manager_lookup_from_event (manager, event);
+
+  if (!tablet)
+    return FALSE;
+
+  return meta_wayland_tablet_handle_event (tablet, event);
+}
diff --git a/src/wayland/meta-wayland-tablet-manager.h b/src/wayland/meta-wayland-tablet-manager.h
new file mode 100644
index 0000000..75408ed
--- /dev/null
+++ b/src/wayland/meta-wayland-tablet-manager.h
@@ -0,0 +1,50 @@
+/*
+ * 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 *tablets;
+};
+
+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);
+
+#endif /* META_WAYLAND_TABLET_MANAGER_H */
diff --git a/src/wayland/meta-wayland-types.h b/src/wayland/meta-wayland-types.h
index 700b7a5..27149f7 100644
--- a/src/wayland/meta-wayland-types.h
+++ b/src/wayland/meta-wayland-types.h
@@ -35,6 +35,7 @@ typedef struct _MetaWaylandDataOffer MetaWaylandDataOffer;
 typedef struct _MetaWaylandDataSource MetaWaylandDataSource;
 typedef struct _MetaWaylandDataDevice MetaWaylandDataDevice;
 
+typedef struct _MetaWaylandTabletManager MetaWaylandTabletManager;
 typedef struct _MetaWaylandTablet MetaWaylandTablet;
 
 typedef struct _MetaWaylandBuffer MetaWaylandBuffer;