/*
 * Copyright (C) 2018 Endless, Inc.
 *
 * 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.
 *
 * Written by:
 *     Georges Basile Stavracas Neto <gbsneto@gnome.org>
 */

#include "compositor/meta-surface-actor-wayland.h"
#include "compositor/meta-window-actor-wayland.h"
#include "meta/meta-window-actor.h"
#include "wayland/meta-wayland-surface.h"

struct _MetaWindowActorWayland
{
  MetaWindowActor parent;
};

G_DEFINE_TYPE (MetaWindowActorWayland, meta_window_actor_wayland, META_TYPE_WINDOW_ACTOR)

static gboolean
remove_surface_actor_from_children (GNode    *node,
                                    gpointer  data)
{
  MetaWaylandSurface *surface = node->data;
  MetaSurfaceActor *surface_actor = meta_wayland_surface_get_actor (surface);
  MetaWindowActor *window_actor = data;
  ClutterActor *parent;

  parent = clutter_actor_get_parent (CLUTTER_ACTOR (surface_actor));
  if (!parent)
    return FALSE;

  g_return_val_if_fail (parent == CLUTTER_ACTOR (window_actor), FALSE);

  clutter_actor_remove_child (CLUTTER_ACTOR (window_actor),
                              CLUTTER_ACTOR (surface_actor));

  return FALSE;
}

static gboolean
add_surface_actor_to_children (GNode    *node,
                               gpointer  data)
{
  MetaWaylandSurface *surface = node->data;
  MetaSurfaceActor *surface_actor = meta_wayland_surface_get_actor (surface);
  MetaWindowActor *window_actor = data;

  clutter_actor_add_child (CLUTTER_ACTOR (window_actor),
                           CLUTTER_ACTOR (surface_actor));

  return FALSE;
}

void
meta_window_actor_wayland_rebuild_surface_tree (MetaWindowActor *actor)
{
  MetaSurfaceActor *surface_actor =
    meta_window_actor_get_surface (actor);
  MetaWaylandSurface *surface = meta_surface_actor_wayland_get_surface (
    META_SURFACE_ACTOR_WAYLAND (surface_actor));
  GNode *root_node = surface->subsurface_branch_node;

  g_node_traverse (root_node,
                   G_IN_ORDER,
                   G_TRAVERSE_LEAVES,
                   -1,
                   remove_surface_actor_from_children,
                   actor);

  g_node_traverse (root_node,
                   G_IN_ORDER,
                   G_TRAVERSE_LEAVES,
                   -1,
                   add_surface_actor_to_children,
                   actor);
}

static void
meta_window_actor_wayland_assign_surface_actor (MetaWindowActor  *actor,
                                                MetaSurfaceActor *surface_actor)
{
  MetaWindowActorClass *parent_class =
    META_WINDOW_ACTOR_CLASS (meta_window_actor_wayland_parent_class);

  g_warn_if_fail (!meta_window_actor_get_surface (actor));

  parent_class->assign_surface_actor (actor, surface_actor);

  meta_window_actor_wayland_rebuild_surface_tree (actor);
}

static void
meta_window_actor_wayland_frame_complete (MetaWindowActor  *actor,
                                          ClutterFrameInfo *frame_info,
                                          int64_t           presentation_time)
{
}

static void
meta_window_actor_wayland_queue_frame_drawn (MetaWindowActor *actor,
                                             gboolean         skip_sync_delay)
{
}

static void
meta_window_actor_wayland_pre_paint (MetaWindowActor *actor)
{
}

static void
meta_window_actor_wayland_post_paint (MetaWindowActor *actor)
{
}

static void
meta_window_actor_wayland_queue_destroy (MetaWindowActor *actor)
{
}

static void
meta_window_actor_wayland_set_frozen (MetaWindowActor *actor,
                                      gboolean         frozen)
{
}

static gboolean
meta_window_actor_wayland_get_paint_volume (ClutterActor       *actor,
                                            ClutterPaintVolume *volume)
{
  MetaSurfaceActor *surface;

  surface = meta_window_actor_get_surface (META_WINDOW_ACTOR (actor));
  if (surface)
    {
      ClutterActor *surface_actor = CLUTTER_ACTOR (surface);
      const ClutterPaintVolume *child_volume;

      child_volume = clutter_actor_get_transformed_paint_volume (surface_actor,
                                                                 actor);
      if (!child_volume)
        return FALSE;

      clutter_paint_volume_union (volume, child_volume);
    }

  return TRUE;
}

static void
meta_window_actor_wayland_update_regions (MetaWindowActor *actor)
{
}

static void
meta_window_actor_wayland_class_init (MetaWindowActorWaylandClass *klass)
{
  MetaWindowActorClass *window_actor_class = META_WINDOW_ACTOR_CLASS (klass);
  ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);

  actor_class->get_paint_volume = meta_window_actor_wayland_get_paint_volume;

  window_actor_class->assign_surface_actor = meta_window_actor_wayland_assign_surface_actor;
  window_actor_class->frame_complete = meta_window_actor_wayland_frame_complete;
  window_actor_class->queue_frame_drawn = meta_window_actor_wayland_queue_frame_drawn;
  window_actor_class->pre_paint = meta_window_actor_wayland_pre_paint;
  window_actor_class->post_paint = meta_window_actor_wayland_post_paint;
  window_actor_class->queue_destroy = meta_window_actor_wayland_queue_destroy;
  window_actor_class->set_frozen = meta_window_actor_wayland_set_frozen;
  window_actor_class->update_regions = meta_window_actor_wayland_update_regions;
}

static void
meta_window_actor_wayland_init (MetaWindowActorWayland *self)
{
}