/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */

/*
 * Copyright (C) 2015 Red Hat 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, see <http://www.gnu.org/licenses/>.
 *
 * Written by:
 *     Jonas Ådahl <jadahl@gmail.com>
 */

#include "config.h"

#include "wayland/meta-wayland-legacy-xdg-foreign.h"

#include <wayland-server.h>

#include "core/util-private.h"
#include "wayland/meta-wayland-private.h"
#include "wayland/meta-wayland-versions.h"
#include "wayland/meta-wayland-xdg-foreign-private.h"

#include "xdg-foreign-unstable-v1-server-protocol.h"

static void
xdg_exporter_v1_destroy (struct wl_client   *client,
                         struct wl_resource *resource)
{
  wl_resource_destroy (resource);
}

static void
xdg_exported_v1_destroy (struct wl_client   *client,
                         struct wl_resource *resource)
{
  wl_resource_destroy (resource);
}

static const struct zxdg_exported_v1_interface meta_xdg_exported_v1_interface = {
  xdg_exported_v1_destroy,
};

static void
xdg_exported_v1_destructor (struct wl_resource *resource)
{
  MetaWaylandXdgExported *exported = wl_resource_get_user_data (resource);

  if (exported)
    meta_wayland_xdg_exported_destroy (exported);
}

static void
xdg_exporter_v1_export (struct wl_client   *client,
                        struct wl_resource *resource,
                        uint32_t            id,
                        struct wl_resource *surface_resource)
{
  MetaWaylandXdgForeign *foreign = wl_resource_get_user_data (resource);
  MetaWaylandSurface *surface = wl_resource_get_user_data (surface_resource);
  struct wl_resource *xdg_exported_resource;
  MetaWaylandXdgExported *exported;
  const char *handle;

  if (!meta_wayland_xdg_foreign_is_valid_surface (surface, resource))
    return;

  xdg_exported_resource =
    wl_resource_create (client,
                        &zxdg_exported_v1_interface,
                        wl_resource_get_version (resource),
                        id);
  if (!xdg_exported_resource)
    {
      wl_client_post_no_memory (client);
      return;
    }

  exported = meta_wayland_xdg_foreign_export (foreign, xdg_exported_resource, surface);
  if (!exported)
    return;

  wl_resource_set_implementation (xdg_exported_resource,
                                  &meta_xdg_exported_v1_interface,
                                  exported,
                                  xdg_exported_v1_destructor);

  handle = meta_wayland_xdg_exported_get_handle (exported);

  zxdg_exported_v1_send_handle (xdg_exported_resource, handle);
}

static const struct zxdg_exporter_v1_interface meta_xdg_exporter_v1_interface = {
  xdg_exporter_v1_destroy,
  xdg_exporter_v1_export,
};

static void
bind_xdg_exporter_v1 (struct wl_client *client,
                      void             *data,
                      uint32_t          version,
                      uint32_t          id)
{
  MetaWaylandXdgForeign *foreign = data;
  struct wl_resource *resource;

  resource = wl_resource_create (client,
                                 &zxdg_exporter_v1_interface,
                                 META_ZXDG_EXPORTER_V1_VERSION,
                                 id);

  if (resource == NULL)
    {
      wl_client_post_no_memory (client);
      return;
    }

  wl_resource_set_implementation (resource,
                                  &meta_xdg_exporter_v1_interface,
                                  foreign, NULL);
}

static void
xdg_imported_v1_destroy (struct wl_client   *client,
                         struct wl_resource *resource)
{
  wl_resource_destroy (resource);
}

static void
xdg_imported_v1_set_parent_of (struct wl_client   *client,
                               struct wl_resource *resource,
                               struct wl_resource *surface_resource)
{
  MetaWaylandXdgImported *imported = wl_resource_get_user_data (resource);

  if (!imported)
    return;

  meta_wayland_xdg_imported_set_parent_of (imported, surface_resource);
}

static const struct zxdg_imported_v1_interface meta_xdg_imported_v1_interface = {
  xdg_imported_v1_destroy,
  xdg_imported_v1_set_parent_of,
};

static void
xdg_importer_v1_destroy (struct wl_client   *client,
                         struct wl_resource *resource)
{
  wl_resource_destroy (resource);
}

static void
xdg_imported_v1_destructor (struct wl_resource *resource)
{
  MetaWaylandXdgImported *imported;

  imported = wl_resource_get_user_data (resource);
  if (!imported)
    return;

  meta_wayland_xdg_imported_destroy (imported);
}

static void
xdg_importer_v1_import (struct wl_client   *client,
                        struct wl_resource *resource,
                        uint32_t            id,
                        const char         *handle)
{
  MetaWaylandXdgForeign *foreign = wl_resource_get_user_data (resource);
  struct wl_resource *xdg_imported_resource;
  MetaWaylandXdgImported *imported;

  xdg_imported_resource =
    wl_resource_create (client,
                        &zxdg_imported_v1_interface,
                        wl_resource_get_version (resource),
                        id);
  if (!xdg_imported_resource)
    {
      wl_client_post_no_memory (client);
      return;
    }

  imported = meta_wayland_xdg_foreign_import (foreign, xdg_imported_resource,
                                              handle,
                                              zxdg_imported_v1_send_destroyed);

  wl_resource_set_implementation (xdg_imported_resource,
                                  &meta_xdg_imported_v1_interface,
                                  imported,
                                  xdg_imported_v1_destructor);

  if (!imported)
    {
      zxdg_imported_v1_send_destroyed (xdg_imported_resource);
      return;
    }
}

static const struct zxdg_importer_v1_interface meta_xdg_importer_v1_interface = {
  xdg_importer_v1_destroy,
  xdg_importer_v1_import,
};

static void
bind_xdg_importer_v1 (struct wl_client *client,
                      void             *data,
                      uint32_t          version,
                      uint32_t          id)
{
  MetaWaylandXdgForeign *foreign = data;
  struct wl_resource *resource;

  resource = wl_resource_create (client,
                                 &zxdg_importer_v1_interface,
                                 META_ZXDG_IMPORTER_V1_VERSION,
                                 id);

  if (resource == NULL)
    {
      wl_client_post_no_memory (client);
      return;
    }

  wl_resource_set_implementation (resource,
                                  &meta_xdg_importer_v1_interface,
                                  foreign,
                                  NULL);
}

gboolean
meta_wayland_legacy_xdg_foreign_init (MetaWaylandCompositor *compositor)
{
  if (wl_global_create (compositor->wayland_display,
                        &zxdg_exporter_v1_interface, 1,
                        compositor->foreign,
                        bind_xdg_exporter_v1) == NULL)
    return FALSE;

  if (wl_global_create (compositor->wayland_display,
                        &zxdg_importer_v1_interface, 1,
                        compositor->foreign,
                        bind_xdg_importer_v1) == NULL)
    return FALSE;

  return TRUE;
}