[mutter/wip/tablet-protocol-v2: 23/65] wayland: Implement wp_tablet_pad

[Carlos Garnacho <carlosg src gnome org>]

commit 3136b3c6826c9e7400292020dc00354a1409f3c7
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue May 10 17:14:13 2016 +0200

    wayland: Implement wp_tablet_pad
    
    This object represents the collection of buttons, strips and rings
    in a tablet pad. All the objects created (pad, strips and rings)
    share a common focus surface and have the same lifetime.

 src/Makefile.am                       |    2 +
 src/wayland/meta-wayland-tablet-pad.c |  304 +++++++++++++++++++++++++++++++++
 src/wayland/meta-wayland-tablet-pad.h |   74 ++++++++
 3 files changed, 380 insertions(+), 0 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index 2dbd7be..45a8185 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -302,6 +302,8 @@ libmutter_la_SOURCES +=                             \
        wayland/meta-wayland-tablet-seat.h      \
        wayland/meta-wayland-tablet-tool.c      \
        wayland/meta-wayland-tablet-tool.h      \
+       wayland/meta-wayland-tablet-pad.c       \
+       wayland/meta-wayland-tablet-pad.h       \
        wayland/meta-wayland-tablet-pad-group.c \
        wayland/meta-wayland-tablet-pad-group.h \
        wayland/meta-wayland-tablet-pad-ring.c  \
diff --git a/src/wayland/meta-wayland-tablet-pad.c b/src/wayland/meta-wayland-tablet-pad.c
new file mode 100644
index 0000000..4c62f48
--- /dev/null
+++ b/src/wayland/meta-wayland-tablet-pad.c
@@ -0,0 +1,304 @@
+/*
+ * Wayland Support
+ *
+ * Copyright (C) 2016 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-v2-server-protocol.h"
+
+#include "meta-surface-actor-wayland.h"
+#include "meta-wayland-private.h"
+#include "meta-wayland-tablet-pad.h"
+#include "meta-wayland-tablet-pad-group.h"
+#include "meta-wayland-tablet-pad-ring.h"
+#include "meta-wayland-tablet-pad-strip.h"
+
+#ifdef HAVE_NATIVE_BACKEND
+#include <clutter/evdev/clutter-evdev.h>
+#include "backends/native/meta-backend-native.h"
+#endif
+
+static void
+unbind_resource (struct wl_resource *resource)
+{
+  wl_list_remove (wl_resource_get_link (resource));
+}
+
+static void
+pad_handle_focus_surface_destroy (struct wl_listener *listener,
+                                  void               *data)
+{
+  MetaWaylandTabletPad *pad = wl_container_of (listener, pad, focus_surface_listener);
+
+  meta_wayland_tablet_pad_set_focus (pad, NULL);
+}
+
+MetaWaylandTabletPad *
+meta_wayland_tablet_pad_new (ClutterInputDevice    *device,
+                             MetaWaylandTabletSeat *tablet_seat)
+{
+  MetaBackend *backend = meta_get_backend ();
+  MetaWaylandTabletPad *pad;
+  guint n_mode_groups, i;
+
+  pad = g_slice_new0 (MetaWaylandTabletPad);
+  wl_list_init (&pad->resource_list);
+  wl_list_init (&pad->focus_resource_list);
+  pad->focus_surface_listener.notify = pad_handle_focus_surface_destroy;
+  pad->device = device;
+  pad->tablet_seat = tablet_seat;
+
+  pad->feedback = g_hash_table_new_full (NULL, NULL, NULL,
+                                         (GDestroyNotify) g_free);
+
+#ifdef HAVE_NATIVE_BACKEND
+  /* Buttons, only can be honored this with the native backend */
+  if (META_IS_BACKEND_NATIVE (backend))
+    {
+      struct libinput_device *libinput_device;
+
+      libinput_device = clutter_evdev_input_device_get_libinput_device (device);
+      pad->n_buttons = libinput_device_tablet_pad_get_num_buttons (libinput_device);
+    }
+#endif
+
+  n_mode_groups = clutter_input_device_get_n_mode_groups (pad->device);
+
+  for (i = 0; i < n_mode_groups; i++)
+    {
+      pad->groups = g_list_prepend (pad->groups,
+                                    meta_wayland_tablet_pad_group_new (pad));
+    }
+
+  return pad;
+}
+
+void
+meta_wayland_tablet_pad_free (MetaWaylandTabletPad *pad)
+{
+  struct wl_resource *resource, *next;
+  GList *l;
+
+  meta_wayland_tablet_pad_set_focus (pad, NULL);
+
+  wl_resource_for_each_safe (resource, next, &pad->resource_list)
+    {
+      zwp_tablet_pad_v2_send_removed (resource);
+      wl_list_remove (wl_resource_get_link (resource));
+      wl_list_init (wl_resource_get_link (resource));
+    }
+
+  for (l = pad->groups; l; l = l->next)
+    meta_wayland_tablet_pad_group_free (l->data);
+
+  g_list_free (pad->groups);
+  g_hash_table_destroy (pad->feedback);
+
+  g_slice_free (MetaWaylandTabletPad, pad);
+}
+
+static void
+tablet_pad_set_feedback (struct wl_client   *client,
+                         struct wl_resource *resource,
+                         uint32_t            button,
+                         const char         *str,
+                         uint32_t            serial)
+{
+  MetaWaylandTabletPad *pad = wl_resource_get_user_data (resource);
+
+  /* FIXME: check serial */
+
+  g_hash_table_insert (pad->feedback, GUINT_TO_POINTER (button), g_strdup (str));
+}
+
+static void
+tablet_pad_destroy (struct wl_client   *client,
+                    struct wl_resource *resource)
+{
+  wl_resource_destroy (resource);
+}
+
+static const struct zwp_tablet_pad_v2_interface pad_interface = {
+  tablet_pad_set_feedback,
+  tablet_pad_destroy,
+};
+
+void
+meta_wayland_tablet_pad_notify (MetaWaylandTabletPad  *pad,
+                                struct wl_resource    *resource)
+{
+  struct wl_client *client = wl_resource_get_client (resource);
+  GList *l;
+
+  zwp_tablet_pad_v2_send_path (resource, clutter_input_device_get_device_node (pad->device));
+  zwp_tablet_pad_v2_send_buttons (resource, pad->n_buttons);
+
+  for (l = pad->groups; l; l = l->next)
+    {
+      MetaWaylandTabletPadGroup *group = l->data;
+      struct wl_resource *group_resource;
+
+      group_resource = meta_wayland_tablet_pad_group_create_new_resource (group,
+                                                                          client,
+                                                                          resource,
+                                                                          0);
+      zwp_tablet_pad_v2_send_group (resource, group_resource);
+      meta_wayland_tablet_pad_group_notify (group, group_resource);
+    }
+
+  zwp_tablet_pad_v2_send_done (resource);
+}
+
+struct wl_resource *
+meta_wayland_tablet_pad_create_new_resource (MetaWaylandTabletPad *pad,
+                                             struct wl_client     *client,
+                                             struct wl_resource   *seat_resource,
+                                             uint32_t              id)
+{
+  struct wl_resource *resource;
+
+  resource = wl_resource_create (client, &zwp_tablet_pad_v2_interface,
+                                 wl_resource_get_version (seat_resource), id);
+  wl_resource_set_implementation (resource, &pad_interface,
+                                  pad, unbind_resource);
+  wl_resource_set_user_data (resource, pad);
+  wl_list_insert (&pad->resource_list, wl_resource_get_link (resource));
+
+  return resource;
+}
+
+struct wl_resource *
+meta_wayland_tablet_pad_lookup_resource (MetaWaylandTabletPad *pad,
+                                         struct wl_client     *client)
+{
+  struct wl_resource *resource;
+
+  resource = wl_resource_find_for_client (&pad->resource_list, client);
+
+  if (!resource)
+    resource = wl_resource_find_for_client (&pad->focus_resource_list, client);
+
+  return resource;
+}
+
+static gboolean
+handle_pad_button_event (MetaWaylandTabletPad *pad,
+                         const ClutterEvent   *event)
+{
+  enum zwp_tablet_pad_v2_button_state button_state;
+  struct wl_list *l = &pad->focus_resource_list;
+  struct wl_resource *resource;
+
+  if (wl_list_empty (l))
+    return FALSE;
+
+  if (event->type == CLUTTER_PAD_BUTTON_PRESS)
+    button_state = ZWP_TABLET_TOOL_V2_BUTTON_STATE_PRESSED;
+  else if (event->type == CLUTTER_PAD_BUTTON_RELEASE)
+    button_state = ZWP_TABLET_TOOL_V2_BUTTON_STATE_RELEASED;
+  else
+    return FALSE;
+
+  wl_resource_for_each (resource, l)
+    {
+      zwp_tablet_pad_v2_send_button (resource,
+                                     clutter_event_get_time (event),
+                                     event->pad_button.button, button_state);
+    }
+
+  return TRUE;
+}
+
+gboolean
+meta_wayland_tablet_pad_handle_event (MetaWaylandTabletPad *pad,
+                                      const ClutterEvent   *event)
+{
+  MetaWaylandTabletPadGroup *group;
+  gboolean handled = FALSE;
+  guint n_group;
+
+  n_group = clutter_event_get_mode_group (event);
+  group = g_list_nth_data (pad->groups, n_group);
+
+  switch (clutter_event_type (event))
+    {
+    case CLUTTER_PAD_BUTTON_PRESS:
+    case CLUTTER_PAD_BUTTON_RELEASE:
+      if (group)
+        handled |= meta_wayland_tablet_pad_group_handle_event (group, event);
+
+      if (handled)
+        return TRUE;
+
+      return handle_pad_button_event (pad, event);
+    case CLUTTER_PAD_RING:
+    case CLUTTER_PAD_STRIP:
+      if (group)
+        return meta_wayland_tablet_pad_group_handle_event (group, event);
+    default:
+      return FALSE;
+    }
+}
+
+static void
+move_resources (struct wl_list *destination, struct wl_list *source)
+{
+  wl_list_insert_list (destination, source);
+  wl_list_init (source);
+}
+
+static void
+move_resources_for_client (struct wl_list *destination,
+                          struct wl_list *source,
+                          struct wl_client *client)
+{
+  struct wl_resource *resource, *tmp;
+
+  wl_resource_for_each_safe (resource, tmp, source)
+    {
+      if (wl_resource_get_client (resource) == client)
+        {
+          wl_list_remove (wl_resource_get_link (resource));
+          wl_list_insert (destination, wl_resource_get_link (resource));
+        }
+    }
+}
+
+static void
+meta_wayland_tablet_pad_update_groups_focus (MetaWaylandTabletPad *pad)
+{
+  GList *l;
+
+  for (l = pad->groups; l; l = l->next)
+    meta_wayland_tablet_pad_group_sync_focus (l->data);
+}
+
+void
+meta_wayland_tablet_pad_set_focus (MetaWaylandTabletPad *pad,
+                                   MetaWaylandSurface   *surface)
+{
+}
diff --git a/src/wayland/meta-wayland-tablet-pad.h b/src/wayland/meta-wayland-tablet-pad.h
new file mode 100644
index 0000000..aa90963
--- /dev/null
+++ b/src/wayland/meta-wayland-tablet-pad.h
@@ -0,0 +1,74 @@
+/*
+ * Wayland Support
+ *
+ * Copyright (C) 2016 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_PAD_H
+#define META_WAYLAND_TABLET_PAD_H
+
+#include <wayland-server.h>
+
+#include <glib.h>
+
+#include "meta-wayland-types.h"
+#include "meta-cursor-renderer.h"
+
+struct _MetaWaylandTabletPad
+{
+  MetaWaylandTabletSeat *tablet_seat;
+  ClutterInputDevice *device;
+
+  struct wl_list resource_list;
+  struct wl_list focus_resource_list;
+
+  MetaWaylandSurface *focus_surface;
+  struct wl_listener focus_surface_listener;
+  uint32_t focus_serial;
+
+  uint32_t n_buttons;
+  GList *groups;
+
+  GHashTable *feedback;
+
+  MetaWaylandSurface *focus;
+};
+
+MetaWaylandTabletPad * meta_wayland_tablet_pad_new       (ClutterInputDevice    *device,
+                                                          MetaWaylandTabletSeat *tablet_seat);
+void                   meta_wayland_tablet_pad_free      (MetaWaylandTabletPad  *pad);
+
+struct wl_resource *
+             meta_wayland_tablet_pad_create_new_resource (MetaWaylandTabletPad *pad,
+                                                          struct wl_client     *client,
+                                                          struct wl_resource   *seat_resource,
+                                                          uint32_t              id);
+struct wl_resource *
+             meta_wayland_tablet_pad_lookup_resource     (MetaWaylandTabletPad *pad,
+                                                          struct wl_client     *client);
+
+void         meta_wayland_tablet_pad_notify              (MetaWaylandTabletPad *pad,
+                                                          struct wl_resource   *resource);
+
+gboolean     meta_wayland_tablet_pad_handle_event        (MetaWaylandTabletPad *pad,
+                                                          const ClutterEvent   *event);
+
+void         meta_wayland_tablet_pad_set_focus           (MetaWaylandTabletPad *pad,
+                                                          MetaWaylandSurface   *surface);
+
+#endif /* META_WAYLAND_TABLET_PAD_H */