[mutter/wip/tablet-protocol: 91/100] wayland: Add MetaWaylandTabletSeat

[Carlos Garnacho <carlosg src gnome org>]

commit 584a568ecafa3a708007b6f1333d0fc52f1e8343
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue Oct 27 15:28:10 2015 +0100

    wayland: Add MetaWaylandTabletSeat
    
    This object groups all the tablets/tools pertaining to a given seat.

 src/Makefile.am                        |    2 +
 src/wayland/meta-wayland-tablet-seat.c |  334 ++++++++++++++++++++++++++++++++
 src/wayland/meta-wayland-tablet-seat.h |   66 +++++++
 src/wayland/meta-wayland-types.h       |    1 +
 4 files changed, 403 insertions(+), 0 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index ca119a3..9547762 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -272,6 +272,8 @@ libmutter_la_SOURCES +=                             \
        wayland/meta-wayland-seat.h             \
        wayland/meta-wayland-tablet.c           \
        wayland/meta-wayland-tablet.h           \
+       wayland/meta-wayland-tablet-seat.c      \
+       wayland/meta-wayland-tablet-seat.h      \
        wayland/meta-wayland-tablet-tool.c      \
        wayland/meta-wayland-tablet-tool.h      \
        wayland/meta-wayland-touch.c            \
diff --git a/src/wayland/meta-wayland-tablet-seat.c b/src/wayland/meta-wayland-tablet-seat.c
new file mode 100644
index 0000000..30ac47c
--- /dev/null
+++ b/src/wayland/meta-wayland-tablet-seat.c
@@ -0,0 +1,334 @@
+/*
+ * 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-seat.h"
+#include "meta-wayland-tablet.h"
+#include "meta-wayland-tablet-tool.h"
+
+static void
+unbind_resource (struct wl_resource *resource)
+{
+  wl_list_remove (wl_resource_get_link (resource));
+}
+
+static void
+notify_tool_added (MetaWaylandTabletSeat *tablet_seat,
+                   struct wl_resource    *client_resource,
+                   MetaWaylandTabletTool *tool)
+{
+  struct wl_resource *tool_resource;
+  struct wl_client *client;
+
+  client = wl_resource_get_client (client_resource);
+  tool_resource = meta_wayland_tablet_tool_lookup_resource (tool, client);
+
+  if (!tool_resource)
+    return;
+
+  zwp_tablet_seat_v1_send_tool_added (client_resource, tool_resource);
+}
+
+static void
+notify_tablet_added (MetaWaylandTabletSeat *tablet_seat,
+                     struct wl_resource    *client_resource,
+                     ClutterInputDevice    *device)
+{
+  struct wl_resource *resource;
+  MetaWaylandTablet *tablet;
+  struct wl_client *client;
+
+  tablet = g_hash_table_lookup (tablet_seat->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;
+
+  zwp_tablet_seat_v1_send_tablet_added (client_resource, resource);
+  meta_wayland_tablet_notify (tablet, resource);
+}
+
+static void
+broadcast_tablet_added (MetaWaylandTabletSeat *tablet_seat,
+                        ClutterInputDevice    *device)
+{
+  struct wl_resource *resource;
+
+  wl_resource_for_each (resource, &tablet_seat->resource_list)
+    {
+      notify_tablet_added (tablet_seat, resource, device);
+    }
+}
+
+static void
+notify_tablets (MetaWaylandTabletSeat *tablet_seat,
+                struct wl_resource    *client_resource)
+{
+  ClutterInputDevice *device;
+  GHashTableIter iter;
+
+  g_hash_table_iter_init (&iter, tablet_seat->tablets);
+
+  while (g_hash_table_iter_next (&iter, (gpointer *) &device, NULL))
+    notify_tablet_added (tablet_seat, client_resource, device);
+}
+
+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
+meta_wayland_tablet_seat_device_added (MetaWaylandTabletSeat *tablet_seat,
+                                       ClutterInputDevice    *device)
+{
+  MetaWaylandTablet *tablet;
+
+  if (!is_tablet_device (device))
+    return;
+
+  tablet = meta_wayland_tablet_new (device, tablet_seat);
+  g_hash_table_insert (tablet_seat->tablets, device, tablet);
+  broadcast_tablet_added (tablet_seat, device);
+}
+
+static void
+meta_wayland_tablet_seat_device_removed (MetaWaylandTabletSeat *tablet_seat,
+                                         ClutterInputDevice    *device)
+{
+  g_hash_table_remove (tablet_seat->tablets, device);
+}
+
+static void
+tablet_seat_destroy (struct wl_client   *client,
+                     struct wl_resource *resource)
+{
+  wl_resource_destroy (resource);
+}
+
+static const struct zwp_tablet_seat_v1_interface tablet_seat_interface = {
+  tablet_seat_destroy
+};
+
+MetaWaylandTabletSeat *
+meta_wayland_tablet_seat_new (MetaWaylandTabletManager *manager)
+{
+  MetaWaylandTabletSeat *tablet_seat;
+  const GSList *devices, *l;
+
+  tablet_seat = g_slice_new0 (MetaWaylandTabletSeat);
+  tablet_seat->manager = manager;
+  tablet_seat->device_manager = clutter_device_manager_get_default ();
+  tablet_seat->tablets = g_hash_table_new_full (NULL, NULL, NULL,
+                                                (GDestroyNotify) meta_wayland_tablet_free);
+  tablet_seat->tools = g_hash_table_new_full (NULL, NULL, NULL,
+                                              (GDestroyNotify) meta_wayland_tablet_tool_free);
+  wl_list_init (&tablet_seat->resource_list);
+
+  g_signal_connect_swapped (tablet_seat->device_manager, "device-added",
+                            G_CALLBACK (meta_wayland_tablet_seat_device_added),
+                            tablet_seat);
+  g_signal_connect_swapped (tablet_seat->device_manager, "device-removed",
+                            G_CALLBACK (meta_wayland_tablet_seat_device_removed),
+                            tablet_seat);
+
+  devices = clutter_device_manager_peek_devices (tablet_seat->device_manager);
+
+  for (l = devices; l; l = l->next)
+    meta_wayland_tablet_seat_device_added (tablet_seat, l->data);
+
+  return tablet_seat;
+}
+
+void
+meta_wayland_tablet_seat_free (MetaWaylandTabletSeat *tablet_seat)
+{
+  g_signal_handlers_disconnect_by_data (tablet_seat->device_manager,
+                                        tablet_seat);
+  g_hash_table_destroy (tablet_seat->tablets);
+  g_hash_table_destroy (tablet_seat->tools);
+  g_slice_free (MetaWaylandTabletSeat, tablet_seat);
+}
+
+struct wl_resource *
+meta_wayland_tablet_seat_create_new_resource (MetaWaylandTabletSeat *tablet_seat,
+                                              struct wl_client      *client,
+                                              struct wl_resource    *manager_resource,
+                                              uint32_t               id)
+{
+  struct wl_resource *resource;
+
+  resource = wl_resource_create (client, &zwp_tablet_seat_v1_interface,
+                                 wl_resource_get_version (manager_resource),
+                                 id);
+  wl_resource_set_implementation (resource, &tablet_seat_interface,
+                                  tablet_seat, unbind_resource);
+  wl_resource_set_user_data (resource, tablet_seat);
+  wl_list_insert (&tablet_seat->resource_list, wl_resource_get_link (resource));
+
+  /* Notify client of all available tablets */
+  notify_tablets (tablet_seat, resource);
+
+  return resource;
+}
+
+struct wl_resource *
+meta_wayland_tablet_seat_lookup_resource (MetaWaylandTabletSeat *tablet_seat,
+                                          struct wl_client      *client)
+{
+  return wl_resource_find_for_client (&tablet_seat->resource_list, client);
+}
+
+MetaWaylandTablet *
+meta_wayland_tablet_seat_lookup_tablet (MetaWaylandTabletSeat *tablet_seat,
+                                        ClutterInputDevice    *device)
+{
+  return g_hash_table_lookup (tablet_seat->tablets, device);
+}
+
+MetaWaylandTabletTool *
+meta_wayland_tablet_seat_lookup_tool (MetaWaylandTabletSeat  *tablet_seat,
+                                      ClutterInputDeviceTool *tool)
+{
+  return g_hash_table_lookup (tablet_seat->tools, tool);
+}
+
+static MetaWaylandTabletTool *
+meta_wayland_tablet_seat_ensure_tool (MetaWaylandTabletSeat  *tablet_seat,
+                                      ClutterInputDevice     *device,
+                                      ClutterInputDeviceTool *device_tool)
+{
+  MetaWaylandTabletTool *tool;
+
+  tool = g_hash_table_lookup (tablet_seat->tools, device_tool);
+
+  if (!tool)
+    {
+      tool = meta_wayland_tablet_tool_new (tablet_seat, device, device_tool);
+      g_hash_table_insert (tablet_seat->tools, device_tool, tool);
+    }
+
+  return tool;
+}
+
+void
+meta_wayland_tablet_seat_update (MetaWaylandTabletSeat *tablet_seat,
+                                 const ClutterEvent    *event)
+{
+  ClutterInputDevice *device;
+  ClutterInputDeviceTool *device_tool;
+  MetaWaylandTabletTool *tool = NULL;
+
+  device = clutter_event_get_source_device (event);
+  device_tool = clutter_event_get_device_tool (event);
+
+  if (device && device_tool)
+    tool = meta_wayland_tablet_seat_ensure_tool (tablet_seat, device, device_tool);
+
+  if (!tool)
+    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_tool_update (tool, event);
+      break;
+    default:
+      break;
+    }
+}
+
+gboolean
+meta_wayland_tablet_seat_handle_event (MetaWaylandTabletSeat *tablet_seat,
+                                       const ClutterEvent    *event)
+{
+  ClutterInputDeviceTool *device_tool;
+  MetaWaylandTabletTool *tool = NULL;
+
+  device_tool = clutter_event_get_device_tool (event);
+
+  if (device_tool)
+    tool = g_hash_table_lookup (tablet_seat->tools, device_tool);
+
+  if (!tool)
+    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:
+      meta_wayland_tablet_tool_handle_event (tool, event);
+      return CLUTTER_EVENT_PROPAGATE;
+    default:
+      return CLUTTER_EVENT_STOP;
+    }
+}
+
+void
+meta_wayland_tablet_seat_notify_tool (MetaWaylandTabletSeat *tablet_seat,
+                                      MetaWaylandTabletTool *tool,
+                                      struct wl_client      *client)
+{
+  struct wl_resource *resource;
+
+  resource = wl_resource_find_for_client (&tablet_seat->resource_list, client);
+
+  if (resource)
+    notify_tool_added (tablet_seat, resource, tool);
+}
diff --git a/src/wayland/meta-wayland-tablet-seat.h b/src/wayland/meta-wayland-tablet-seat.h
new file mode 100644
index 0000000..b39dff1
--- /dev/null
+++ b/src/wayland/meta-wayland-tablet-seat.h
@@ -0,0 +1,66 @@
+/*
+ * 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_SEAT_H
+#define META_WAYLAND_TABLET_SEAT_H
+
+#include <wayland-server.h>
+
+#include <glib.h>
+
+#include "meta-wayland-types.h"
+
+struct _MetaWaylandTabletSeat
+{
+  MetaWaylandTabletManager *manager;
+  ClutterDeviceManager *device_manager;
+  struct wl_list resource_list;
+
+  GHashTable *tablets;
+  GHashTable *tools;
+};
+
+MetaWaylandTabletSeat *meta_wayland_tablet_seat_new  (MetaWaylandTabletManager *tablet_manager);
+void                   meta_wayland_tablet_seat_free (MetaWaylandTabletSeat    *tablet_seat);
+
+struct wl_resource    *meta_wayland_tablet_seat_create_new_resource (MetaWaylandTabletSeat *tablet_seat,
+                                                                     struct wl_client      *client,
+                                                                     struct wl_resource    *seat_resource,
+                                                                     uint32_t               id);
+struct wl_resource    *meta_wayland_tablet_seat_lookup_resource     (MetaWaylandTabletSeat *tablet_seat,
+                                                                     struct wl_client      *client);
+
+MetaWaylandTablet     *meta_wayland_tablet_seat_lookup_tablet       (MetaWaylandTabletSeat *tablet_seat,
+                                                                     ClutterInputDevice    *device);
+
+MetaWaylandTabletTool *meta_wayland_tablet_seat_lookup_tool         (MetaWaylandTabletSeat  *tablet_seat,
+                                                                     ClutterInputDeviceTool *tool);
+
+void                   meta_wayland_tablet_seat_update              (MetaWaylandTabletSeat *tablet_seat,
+                                                                     const ClutterEvent    *event);
+gboolean               meta_wayland_tablet_seat_handle_event        (MetaWaylandTabletSeat *tablet_seat,
+                                                                     const ClutterEvent    *event);
+
+void                   meta_wayland_tablet_seat_notify_tool         (MetaWaylandTabletSeat *tablet_seat,
+                                                                     MetaWaylandTabletTool *tool,
+                                                                     struct wl_client      *client);
+
+#endif /* META_WAYLAND_TABLET_SEAT_H */
diff --git a/src/wayland/meta-wayland-types.h b/src/wayland/meta-wayland-types.h
index 2719e6d..54da62f 100644
--- a/src/wayland/meta-wayland-types.h
+++ b/src/wayland/meta-wayland-types.h
@@ -36,6 +36,7 @@ typedef struct _MetaWaylandDragDestFuncs MetaWaylandDragDestFuncs;
 typedef struct _MetaWaylandDataOffer MetaWaylandDataOffer;
 typedef struct _MetaWaylandDataDevice MetaWaylandDataDevice;
 
+typedef struct _MetaWaylandTabletManager MetaWaylandTabletManager;
 typedef struct _MetaWaylandTabletSeat MetaWaylandTabletSeat;
 typedef struct _MetaWaylandTabletTool MetaWaylandTabletTool;
 typedef struct _MetaWaylandTablet MetaWaylandTablet;