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[mutter] wayland: Implement wp_tablet_pad_group

commit c5d07917101466625a4c5a1a5804adee5457b56a
Author: Carlos Garnacho <carlosg gnome org>
Date:   Wed Jun 22 14:45:43 2016 +0200

    wayland: Implement wp_tablet_pad_group

 src/Makefile.am                             |    2 +
 src/wayland/meta-wayland-tablet-pad-group.c |  457 +++++++++++++++++++++++++++
 src/wayland/meta-wayland-tablet-pad-group.h |   72 +++++
 src/wayland/meta-wayland-types.h            |    2 +
 4 files changed, 533 insertions(+), 0 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index b2cf62a..955f900 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -317,6 +317,8 @@ 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-group.c \
+       wayland/meta-wayland-tablet-pad-group.h \
        wayland/meta-wayland-tablet-pad-ring.c  \
        wayland/meta-wayland-tablet-pad-ring.h  \
        wayland/meta-wayland-tablet-pad-strip.c \
diff --git a/src/wayland/meta-wayland-tablet-pad-group.c b/src/wayland/meta-wayland-tablet-pad-group.c
new file mode 100644
index 0000000..f63202c
--- /dev/null
+++ b/src/wayland/meta-wayland-tablet-pad-group.c
@@ -0,0 +1,457 @@
+/*
+ * 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 <wayland-server.h>
+#include "tablet-unstable-v2-server-protocol.h"
+
+#include "meta-surface-actor-wayland.h"
+#include "meta-wayland-tablet-seat.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));
+}
+
+MetaWaylandTabletPadGroup *
+meta_wayland_tablet_pad_group_new (MetaWaylandTabletPad *pad)
+{
+  MetaWaylandTabletPadGroup *group;
+  guint n_elems, i;
+
+  group = g_slice_new0 (MetaWaylandTabletPadGroup);
+  wl_list_init (&group->resource_list);
+  wl_list_init (&group->focus_resource_list);
+  group->pad = pad;
+
+  n_elems = clutter_input_device_get_n_rings (pad->device);
+
+  for (i = 0; i < n_elems; i++)
+    {
+      group->rings = g_list_prepend (group->rings,
+                                     meta_wayland_tablet_pad_ring_new (pad));
+    }
+
+  n_elems = clutter_input_device_get_n_strips (pad->device);
+
+  for (i = 0; i < n_elems; i++)
+    {
+      group->strips = g_list_prepend (group->strips,
+                                      meta_wayland_tablet_pad_strip_new (pad));
+    }
+
+  return group;
+}
+
+void
+meta_wayland_tablet_pad_group_free (MetaWaylandTabletPadGroup *group)
+{
+  struct wl_resource *resource, *next;
+  GList *l;
+
+  wl_resource_for_each_safe (resource, next, &group->resource_list)
+    {
+      wl_list_remove (wl_resource_get_link (resource));
+      wl_list_init (wl_resource_get_link (resource));
+    }
+
+  for (l = group->rings; l; l = l->next)
+    meta_wayland_tablet_pad_ring_free (l->data);
+  for (l = group->strips; l; l = l->next)
+    meta_wayland_tablet_pad_strip_free (l->data);
+
+  g_list_free (group->rings);
+  g_list_free (group->strips);
+
+  g_slice_free (MetaWaylandTabletPadGroup, group);
+}
+
+static void
+tablet_pad_group_destroy (struct wl_client   *client,
+                          struct wl_resource *resource)
+{
+  wl_resource_destroy (resource);
+}
+
+static const struct zwp_tablet_pad_group_v2_interface group_interface = {
+  tablet_pad_group_destroy
+};
+
+struct wl_resource *
+meta_wayland_tablet_pad_group_create_new_resource (MetaWaylandTabletPadGroup *group,
+                                                   struct wl_client          *client,
+                                                   struct wl_resource        *pad_resource,
+                                                   uint32_t                   id)
+{
+  struct wl_resource *resource;
+
+  resource = wl_resource_create (client, &zwp_tablet_pad_group_v2_interface,
+                                 wl_resource_get_version (pad_resource), id);
+  wl_resource_set_implementation (resource, &group_interface,
+                                  group, unbind_resource);
+  wl_resource_set_user_data (resource, group);
+  wl_list_insert (&group->resource_list, wl_resource_get_link (resource));
+
+  return resource;
+}
+
+struct wl_resource *
+meta_wayland_tablet_pad_group_lookup_resource (MetaWaylandTabletPadGroup *group,
+                                               struct wl_client          *client)
+{
+  struct wl_resource *resource;
+
+  resource = wl_resource_find_for_client (&group->resource_list, client);
+
+  if (!resource)
+    resource = wl_resource_find_for_client (&group->focus_resource_list, client);
+
+  return resource;
+}
+
+static guint
+tablet_pad_group_get_current_mode (MetaWaylandTabletPadGroup *group)
+{
+  MetaBackend *backend = meta_get_backend ();
+
+#ifdef HAVE_NATIVE_BACKEND
+  if (META_IS_BACKEND_NATIVE (backend))
+    {
+      struct libinput_device *libinput_device;
+      struct libinput_tablet_pad_mode_group *mode_group;
+      guint n_group;
+
+      libinput_device = clutter_evdev_input_device_get_libinput_device (group->pad->device);
+      n_group = g_list_index (group->pad->groups, group);
+      mode_group = libinput_device_tablet_pad_get_mode_group (libinput_device, n_group);
+
+      return libinput_tablet_pad_mode_group_get_mode (mode_group);
+    }
+  else
+#endif
+    return 0;
+}
+
+static guint
+tablet_pad_group_get_n_modes (MetaWaylandTabletPadGroup *group)
+{
+  MetaBackend *backend = meta_get_backend ();
+  guint n_modes = 1;
+
+#ifdef HAVE_NATIVE_BACKEND
+  if (META_IS_BACKEND_NATIVE (backend))
+    {
+      struct libinput_device *libinput_device;
+      struct libinput_tablet_pad_mode_group *mode_group;
+      guint n_group;
+
+      libinput_device = clutter_evdev_input_device_get_libinput_device (group->pad->device);
+      n_group = g_list_index (group->pad->groups, group);
+      mode_group = libinput_device_tablet_pad_get_mode_group (libinput_device, n_group);
+      n_modes = libinput_tablet_pad_mode_group_get_num_modes (mode_group);
+    }
+#endif
+
+  return n_modes;
+}
+
+static gboolean
+tablet_pad_group_has_button (MetaWaylandTabletPadGroup *group,
+                             guint                      button)
+{
+  MetaBackend *backend = meta_get_backend ();
+
+#ifdef HAVE_NATIVE_BACKEND
+  if (META_IS_BACKEND_NATIVE (backend))
+    {
+      struct libinput_device *libinput_device;
+      struct libinput_tablet_pad_mode_group *mode_group;
+      guint n_group;
+
+      libinput_device = clutter_evdev_input_device_get_libinput_device (group->pad->device);
+      n_group = g_list_index (group->pad->groups, group);
+      mode_group = libinput_device_tablet_pad_get_mode_group (libinput_device, n_group);
+
+      return libinput_tablet_pad_mode_group_has_button (mode_group, button);
+    }
+  else
+#endif
+    {
+      return g_list_length (group->pad->groups) == 1;
+    }
+}
+
+void
+meta_wayland_tablet_pad_group_notify (MetaWaylandTabletPadGroup *group,
+                                      struct wl_resource        *resource)
+{
+  struct wl_client *client = wl_resource_get_client (resource);
+  struct wl_array buttons;
+  guint i, n_modes;
+  GList *l;
+
+  wl_array_init (&buttons);
+
+  /* Buttons */
+  for (i = 0; i < group->pad->n_buttons; i++)
+    {
+      uint32_t *pos;
+
+      if (!tablet_pad_group_has_button (group, i))
+        continue;
+
+      pos = wl_array_add (&buttons, sizeof (*pos));
+      *pos = i;
+    }
+
+  zwp_tablet_pad_group_v2_send_buttons (resource, &buttons);
+  wl_array_release (&buttons);
+
+  /* Rings */
+  for (l = group->rings; l; l = l->next)
+    {
+      MetaWaylandTabletPadRing *ring = l->data;
+      struct wl_resource *ring_resource;
+
+      ring_resource = meta_wayland_tablet_pad_ring_create_new_resource (ring,
+                                                                        client,
+                                                                        resource,
+                                                                        0);
+      zwp_tablet_pad_group_v2_send_ring (resource, ring_resource);
+    }
+
+  /* Strips */
+  for (l = group->strips; l; l = l->next)
+    {
+      MetaWaylandTabletPadStrip *strip = l->data;
+      struct wl_resource *strip_resource;
+
+      strip_resource = meta_wayland_tablet_pad_strip_create_new_resource (strip,
+                                                                          client,
+                                                                          resource,
+                                                                          0);
+      zwp_tablet_pad_group_v2_send_strip (resource, strip_resource);
+    }
+
+  n_modes = tablet_pad_group_get_n_modes (group);
+  zwp_tablet_pad_group_v2_send_modes (resource, n_modes);
+  zwp_tablet_pad_group_v2_send_done (resource);
+}
+
+void
+meta_wayland_tablet_pad_group_update (MetaWaylandTabletPadGroup *group,
+                                      const ClutterEvent        *event)
+{
+  switch (event->type)
+    {
+    case CLUTTER_PAD_BUTTON_PRESS:
+    case CLUTTER_PAD_BUTTON_RELEASE:
+      if (meta_wayland_tablet_pad_group_is_mode_switch_button (group, event->pad_button.button))
+        group->current_mode = tablet_pad_group_get_current_mode (group);
+      break;
+    default:
+      break;
+    }
+}
+
+static gboolean
+handle_pad_ring_event (MetaWaylandTabletPadGroup *group,
+                       const ClutterEvent        *event)
+{
+  MetaWaylandTabletPadRing *ring;
+
+  if (event->type != CLUTTER_PAD_RING)
+    return FALSE;
+
+  ring = g_list_nth_data (group->rings, event->pad_ring.ring_number);
+
+  if (!ring)
+    return FALSE;
+
+  return meta_wayland_tablet_pad_ring_handle_event (ring, event);
+}
+
+static gboolean
+handle_pad_strip_event (MetaWaylandTabletPadGroup *group,
+                        const ClutterEvent        *event)
+{
+  MetaWaylandTabletPadStrip *strip;
+
+  if (event->type != CLUTTER_PAD_STRIP)
+    return FALSE;
+
+  strip = g_list_nth_data (group->strips, event->pad_strip.strip_number);
+
+  if (!strip)
+    return FALSE;
+
+  return meta_wayland_tablet_pad_strip_handle_event (strip, event);
+}
+
+static void
+broadcast_group_mode (MetaWaylandTabletPadGroup *group,
+                      uint32_t                   time)
+{
+  struct wl_display *display = group->pad->tablet_seat->seat->wl_display;
+  struct wl_resource *resource;
+
+  group->mode_switch_serial = wl_display_next_serial (display);
+
+  wl_resource_for_each (resource, &group->focus_resource_list)
+    {
+      zwp_tablet_pad_group_v2_send_mode_switch (resource, time,
+                                                group->mode_switch_serial,
+                                                group->current_mode);
+    }
+}
+
+gboolean
+meta_wayland_tablet_pad_group_handle_event (MetaWaylandTabletPadGroup *group,
+                                            const ClutterEvent        *event)
+{
+  switch (clutter_event_type (event))
+    {
+    case CLUTTER_PAD_BUTTON_PRESS:
+    case CLUTTER_PAD_BUTTON_RELEASE:
+      if (meta_wayland_tablet_pad_group_is_mode_switch_button (group, event->pad_button.button))
+        {
+          if (event->type == CLUTTER_PAD_BUTTON_PRESS)
+            broadcast_group_mode (group, clutter_event_get_time (event));
+          return TRUE;
+        }
+      else
+        {
+          return FALSE;
+        }
+      break;
+    case CLUTTER_PAD_RING:
+      return handle_pad_ring_event (group, event);
+    case CLUTTER_PAD_STRIP:
+      return handle_pad_strip_event (group, event);
+    default:
+      return FALSE;
+    }
+}
+
+static void
+meta_wayland_tablet_pad_group_update_rings_focus (MetaWaylandTabletPadGroup *group)
+{
+  GList *l;
+
+  for (l = group->rings; l; l = l->next)
+    meta_wayland_tablet_pad_ring_sync_focus (l->data);
+}
+
+static void
+meta_wayland_tablet_pad_group_update_strips_focus (MetaWaylandTabletPadGroup *group)
+{
+  GList *l;
+
+  for (l = group->strips; l; l = l->next)
+    meta_wayland_tablet_pad_strip_sync_focus (l->data);
+}
+
+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));
+        }
+    }
+}
+
+void
+meta_wayland_tablet_pad_group_sync_focus (MetaWaylandTabletPadGroup *group)
+{
+  if (!wl_list_empty (&group->focus_resource_list))
+    {
+      move_resources (&group->resource_list, &group->focus_resource_list);
+    }
+
+  if (group->pad->focus_surface != NULL)
+    {
+      move_resources_for_client (&group->focus_resource_list,
+                                 &group->resource_list,
+                                 wl_resource_get_client (group->pad->focus_surface->resource));
+    }
+
+  meta_wayland_tablet_pad_group_update_rings_focus (group);
+  meta_wayland_tablet_pad_group_update_strips_focus (group);
+
+  if (!wl_list_empty (&group->focus_resource_list))
+    {
+      broadcast_group_mode (group, clutter_get_current_event_time ());
+    }
+}
+
+gboolean
+meta_wayland_tablet_pad_group_is_mode_switch_button (MetaWaylandTabletPadGroup *group,
+                                                     guint                      button)
+{
+  MetaBackend *backend = meta_get_backend ();
+
+#ifdef HAVE_NATIVE_BACKEND
+  if (META_IS_BACKEND_NATIVE (backend))
+    {
+      struct libinput_device *libinput_device;
+      struct libinput_tablet_pad_mode_group *mode_group;
+      guint n_group;
+
+      libinput_device = clutter_evdev_input_device_get_libinput_device (group->pad->device);
+      n_group = g_list_index (group->pad->groups, group);
+      mode_group = libinput_device_tablet_pad_get_mode_group (libinput_device, n_group);
+
+      return libinput_tablet_pad_mode_group_button_is_toggle (mode_group, button) != 0;
+    }
+  else
+#endif
+    return FALSE;
+}
diff --git a/src/wayland/meta-wayland-tablet-pad-group.h b/src/wayland/meta-wayland-tablet-pad-group.h
new file mode 100644
index 0000000..3164eae
--- /dev/null
+++ b/src/wayland/meta-wayland-tablet-pad-group.h
@@ -0,0 +1,72 @@
+/*
+ * 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_GROUP_H
+#define META_WAYLAND_TABLET_PAD_GROUP_H
+
+#include <wayland-server.h>
+
+#include <glib.h>
+
+#include "clutter/clutter.h"
+#include "meta-wayland-types.h"
+
+struct _MetaWaylandTabletPadGroup
+{
+  MetaWaylandTabletPad *pad;
+  GArray *buttons;
+  uint32_t n_modes;
+  uint32_t current_mode;
+
+  struct wl_list resource_list;
+  struct wl_list focus_resource_list;
+  uint32_t mode_switch_serial;
+
+  GList *strips;
+  GList *rings;
+};
+
+MetaWaylandTabletPadGroup * meta_wayland_tablet_pad_group_new  (MetaWaylandTabletPad      *pad);
+void                        meta_wayland_tablet_pad_group_free (MetaWaylandTabletPadGroup *group);
+
+struct wl_resource *
+             meta_wayland_tablet_pad_group_create_new_resource (MetaWaylandTabletPadGroup *group,
+                                                                struct wl_client          *client,
+                                                                struct wl_resource        *pad_resource,
+                                                                uint32_t                   id);
+struct wl_resource *
+             meta_wayland_tablet_pad_group_lookup_resource     (MetaWaylandTabletPadGroup *group,
+                                                                struct wl_client          *client);
+
+void         meta_wayland_tablet_pad_group_notify              (MetaWaylandTabletPadGroup *group,
+                                                                struct wl_resource        *resource);
+
+void         meta_wayland_tablet_pad_group_update              (MetaWaylandTabletPadGroup *group,
+                                                                const ClutterEvent        *event);
+gboolean     meta_wayland_tablet_pad_group_handle_event        (MetaWaylandTabletPadGroup *group,
+                                                                const ClutterEvent        *event);
+
+void         meta_wayland_tablet_pad_group_sync_focus          (MetaWaylandTabletPadGroup *group);
+
+gboolean     meta_wayland_tablet_pad_group_is_mode_switch_button (MetaWaylandTabletPadGroup *group,
+                                                                  guint                      button);
+
+#endif /* META_WAYLAND_TABLET_PAD_GROUP_H */
diff --git a/src/wayland/meta-wayland-types.h b/src/wayland/meta-wayland-types.h
index b927768..11d76f4 100644
--- a/src/wayland/meta-wayland-types.h
+++ b/src/wayland/meta-wayland-types.h
@@ -41,6 +41,8 @@ typedef struct _MetaWaylandTabletManager MetaWaylandTabletManager;
 typedef struct _MetaWaylandTabletSeat MetaWaylandTabletSeat;
 typedef struct _MetaWaylandTabletTool MetaWaylandTabletTool;
 typedef struct _MetaWaylandTablet MetaWaylandTablet;
+typedef struct _MetaWaylandTabletPad MetaWaylandTabletPad;
+typedef struct _MetaWaylandTabletPadGroup MetaWaylandTabletPadGroup;
 typedef struct _MetaWaylandTabletPadStrip MetaWaylandTabletPadStrip;
 typedef struct _MetaWaylandTabletPadRing MetaWaylandTabletPadRing;
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