/*
 * Copyright (C) 2022 Purism SPC
 *               2024-2026 Phosh.mobi e.V.
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 * Author: Guido Günther <agx@sigxcpu.org>
 */

#define G_LOG_DOMAIN "phoc-xdg-toplevel"

#include "phoc-config.h"

#include "cursor.h"
#include "server.h"
#include "view-private.h"
#include "xdg-popup.h"
#include "xdg-shell-protocol.h"
#include "xdg-toplevel.h"
#include "xdg-toplevel-private.h"
#include "xdg-toplevel-decoration.h"

#include <wlr/types/wlr_xdg_decoration_v1.h>
#include <wlr/types/wlr_xdg_shell.h>
#include <wlr/types/wlr_xdg_toplevel_tag_v1.h>
#include <wlr/util/edges.h>

#include <wlr/xwayland.h>
#include <xcb/xproto.h>

enum {
  PROP_0,
  PROP_WLR_XDG_TOPLEVEL,
  PROP_LAST_PROP
};

static GParamSpec *props[PROP_LAST_PROP];

/**
 * PhocXdgToplevel:
 *
 * An xdg toplevel surface as defined in the xdg-shell protocol. For
 * popups see [type@XdgPopup].
 *
 * For details on how to setup such an object see [func@handle_xdg_shell_toplevel].
 */
typedef struct _PhocXdgToplevel {
  PhocView                   view;

  struct wlr_xdg_toplevel   *xdg_toplevel;

  struct wlr_box             saved_geometry;

  struct wl_listener         destroy;
  struct wl_listener         new_popup;
  struct wl_listener         map;
  struct wl_listener         unmap;
  struct wl_listener         request_move;
  struct wl_listener         request_resize;
  struct wl_listener         request_maximize;
  struct wl_listener         request_fullscreen;
  struct wl_listener         set_title;
  struct wl_listener         set_app_id;
  struct wl_listener         set_parent;

  struct wl_listener         surface_commit;

  struct wl_event_source    *frame_done_idle;

  uint32_t                   pending_move_resize_configure_serial;

  PhocXdgToplevelDecoration *decoration;
  char *tag;
} PhocXdgToplevel;

G_DEFINE_TYPE (PhocXdgToplevel, phoc_xdg_toplevel, PHOC_TYPE_VIEW)


static void
send_frame_done (void *user_data)
{
  PhocXdgToplevel *self = PHOC_XDG_TOPLEVEL (user_data);
  struct timespec now;

  self->frame_done_idle = NULL;

  clock_gettime (CLOCK_MONOTONIC, &now);
  wlr_surface_send_frame_done (PHOC_VIEW (self)->wlr_surface, &now);
}

/**
 * send_frame_done_if_not_visible:
 * @self: The #PhocXdgToplevel
 *
 * For views that aren't visible, EGL-Wayland can be stuck
 * in eglSwapBuffers waiting for frame done event. This function
 * helps it get unstuck, so further events can actually be processed
 * by the client. It's worth calling this function when sending
 * events like `configure` or `close`, as these should get processed
 * immediately regardless of surface visibility.
 */
static void
send_frame_done_if_not_visible (PhocXdgToplevel *self)
{
  PhocDesktop *desktop = phoc_server_get_desktop (phoc_server_get_default ());
  PhocView *view = PHOC_VIEW (self);
  struct wl_display *display;
  struct wl_event_loop *loop;

  if (phoc_desktop_view_check_visibility (desktop, view) || !phoc_view_is_mapped (view))
    return;

  display = wl_client_get_display (self->xdg_toplevel->base->client->client);
  loop = wl_display_get_event_loop (display);

  self->frame_done_idle = wl_event_loop_add_idle (loop, send_frame_done, view);
  g_assert (self->frame_done_idle);
}


static void
phoc_xdg_toplevel_set_property (GObject      *object,
                                guint         property_id,
                                const GValue *value,
                                GParamSpec   *pspec)
{
  PhocXdgToplevel *self = PHOC_XDG_TOPLEVEL (object);

  switch (property_id) {
  case PROP_WLR_XDG_TOPLEVEL:
    self->xdg_toplevel = g_value_get_pointer (value);
    self->xdg_toplevel->base->data = self;
    break;
  default:
    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
    break;
  }
}


static void
set_active (PhocView *view, bool active)
{
  struct wlr_xdg_toplevel *xdg_toplevel = PHOC_XDG_TOPLEVEL (view)->xdg_toplevel;

  wlr_xdg_toplevel_set_activated (xdg_toplevel, active);
}

static void
apply_size_constraints (struct wlr_xdg_toplevel *wlr_xdg_toplevel,
                        uint32_t                 width,
                        uint32_t                 height,
                        uint32_t                *dest_width,
                        uint32_t                *dest_height)
{
  *dest_width = width;
  *dest_height = height;

  struct wlr_xdg_toplevel_state *state = &wlr_xdg_toplevel->current;
  if (width < state->min_width)
    *dest_width = state->min_width;
  else if (state->max_width > 0 && width > state->max_width)
    *dest_width = state->max_width;

  if (height < state->min_height)
    *dest_height = state->min_height;
  else if (state->max_height > 0 && height > state->max_height)
    *dest_height = state->max_height;
}

static void
resize (PhocView *view, uint32_t width, uint32_t height)
{
  struct wlr_xdg_toplevel *wlr_xdg_toplevel = PHOC_XDG_TOPLEVEL (view)->xdg_toplevel;
  uint32_t constrained_width, constrained_height;

  apply_size_constraints (wlr_xdg_toplevel, width, height, &constrained_width, &constrained_height);

  if (wlr_xdg_toplevel->scheduled.width == constrained_width &&
      wlr_xdg_toplevel->scheduled.height == constrained_height)
    return;

  if (wlr_xdg_toplevel->base->initialized)
    wlr_xdg_toplevel_set_size (wlr_xdg_toplevel, constrained_width, constrained_height);

  send_frame_done_if_not_visible (PHOC_XDG_TOPLEVEL (view));
}

static void
move_resize (PhocView *view, double x, double y, uint32_t width, uint32_t height)
{
  PhocXdgToplevel *self = PHOC_XDG_TOPLEVEL (view);
  struct wlr_xdg_toplevel *wlr_xdg_toplevel = self->xdg_toplevel;

  bool update_x = x != view->box.x;
  bool update_y = y != view->box.y;

  uint32_t constrained_width, constrained_height;
  apply_size_constraints (wlr_xdg_toplevel, width, height, &constrained_width, &constrained_height);

  if (update_x)
    x = x + width - constrained_width;

  if (update_y)
    y = y + height - constrained_height;

  phoc_view_set_pending_box (view,
                             update_x,
                             update_y,
                             x,
                             y,
                             constrained_width,
                             constrained_height);

  if (wlr_xdg_toplevel->scheduled.width == constrained_width &&
      wlr_xdg_toplevel->scheduled.height == constrained_height) {
    view_update_position (view, x, y);
  } else if (self->xdg_toplevel->base->initialized) {
    self->pending_move_resize_configure_serial =
      wlr_xdg_toplevel_set_size (wlr_xdg_toplevel, constrained_width, constrained_height);
  }

  send_frame_done_if_not_visible (self);
}

static bool
want_scaling (PhocView *view)
{
  return true;
}

static bool
want_auto_maximize (PhocView *view)
{
  struct wlr_xdg_toplevel *xdg_toplevel = PHOC_XDG_TOPLEVEL (view)->xdg_toplevel;

  return xdg_toplevel && !xdg_toplevel->parent;
}


static void
set_maximized (PhocView *view, bool maximized)
{
  PhocXdgToplevel *self = PHOC_XDG_TOPLEVEL (view);

  if (self->xdg_toplevel->base->initialized)
    wlr_xdg_toplevel_set_maximized (self->xdg_toplevel, maximized);
}


static void
set_tiled (PhocView *view, bool tiled)
{
  PhocXdgToplevel *self = PHOC_XDG_TOPLEVEL (view);
  uint32_t tile_edges = WLR_EDGE_NONE;

  if (tiled) {
    switch (phoc_view_get_tile_direction (view)) {
    case PHOC_VIEW_TILE_LEFT:
      tile_edges = WLR_EDGE_TOP | WLR_EDGE_BOTTOM | WLR_EDGE_LEFT;
      break;
    case PHOC_VIEW_TILE_RIGHT:
      tile_edges = WLR_EDGE_TOP | WLR_EDGE_BOTTOM | WLR_EDGE_RIGHT;
      break;
    default:
      g_warn_if_reached ();
    }
  }

  if (self->xdg_toplevel->base->initialized)
    wlr_xdg_toplevel_set_tiled (self->xdg_toplevel, tile_edges);
}


static void
set_suspended (PhocView *view, bool suspended)
{
  PhocXdgToplevel *self = PHOC_XDG_TOPLEVEL (view);
  struct wlr_xdg_toplevel *xdg_toplevel = self->xdg_toplevel;

  wlr_xdg_toplevel_set_suspended (xdg_toplevel, suspended);
  send_frame_done_if_not_visible (self);
}


static void
set_fullscreen (PhocView *view, bool fullscreen)
{
  struct wlr_xdg_toplevel *wlr_xdg_toplevel = PHOC_XDG_TOPLEVEL (view)->xdg_toplevel;

  if (wlr_xdg_toplevel->base->initialized)
    wlr_xdg_toplevel_set_fullscreen (wlr_xdg_toplevel, fullscreen);
}


static void
_close (PhocView *view)
{
  struct wlr_xdg_toplevel *xdg_toplevel = PHOC_XDG_TOPLEVEL (view)->xdg_toplevel;
  struct wlr_xdg_popup *popup, *tmp = NULL;

  wl_list_for_each_safe (popup, tmp, &xdg_toplevel->base->popups, link)
    wlr_xdg_popup_destroy (popup);

  wlr_xdg_toplevel_send_close (xdg_toplevel);

  send_frame_done_if_not_visible (PHOC_XDG_TOPLEVEL (view));
}

static void
for_each_surface (PhocView                   *view,
                  wlr_surface_iterator_func_t iterator,
                  void                       *user_data)
{
  struct wlr_xdg_toplevel *xdg_toplevel = PHOC_XDG_TOPLEVEL (view)->xdg_toplevel;

  wlr_xdg_surface_for_each_surface (xdg_toplevel->base, iterator, user_data);
}


static void
phoc_xdg_toplevel_get_geometry (PhocXdgToplevel *self, struct wlr_box *geom)
{
  *geom = self->xdg_toplevel->base->geometry;
}


static void
get_geometry (PhocView *view, struct wlr_box *geom)
{
  phoc_xdg_toplevel_get_geometry (PHOC_XDG_TOPLEVEL (view), geom);
}


static void
get_size (PhocView *view, struct wlr_box *box)
{
  struct wlr_xdg_toplevel *xdg_toplevel = PHOC_XDG_TOPLEVEL (view)->xdg_toplevel;

  box->width = xdg_toplevel->base->geometry.width;
  box->height = xdg_toplevel->base->geometry.height;
}


static struct wlr_surface *
get_wlr_surface_at (PhocView *self, double sx, double sy, double *sub_x, double *sub_y)
{
  struct wlr_xdg_surface *xdg_surface = PHOC_XDG_TOPLEVEL (self)->xdg_toplevel->base;

  return wlr_xdg_surface_surface_at (xdg_surface, sx, sy, sub_x, sub_y);
}


static pid_t
get_pid (PhocView *view)
{
  PhocXdgToplevel *self = PHOC_XDG_TOPLEVEL (view);
  struct wl_client *client;
  pid_t pid;

  g_assert (self->xdg_toplevel);
  client = wl_resource_get_client (self->xdg_toplevel->base->resource);

  wl_client_get_credentials (client, &pid, NULL, NULL);

  return pid;
}


static void
phoc_xdg_toplevel_set_capabilities (PhocXdgToplevel                      *self,
                                    enum wlr_xdg_toplevel_wm_capabilities caps)
{
  uint32_t version;
  struct wlr_xdg_toplevel *toplevel = self->xdg_toplevel;

  version = wl_resource_get_version (toplevel->resource);
  if (version < XDG_TOPLEVEL_WM_CAPABILITIES_SINCE_VERSION)
    return;

  wlr_xdg_toplevel_set_wm_capabilities (toplevel, caps);
}


static void
handle_surface_commit (struct wl_listener *listener, void *data)
{
  PhocXdgToplevel *self = wl_container_of (listener, self, surface_commit);
  PhocView *view = PHOC_VIEW (self);
  struct wlr_xdg_toplevel *xdg_toplevel = self->xdg_toplevel;

  if (xdg_toplevel->base->initial_commit) {
    PhocOutput *output = NULL;

    /* Let the client pick the initial size for now */
    wlr_xdg_toplevel_set_size (xdg_toplevel, 0, 0);

    /* catch up with state accumulated before committing */
    if (self->xdg_toplevel->parent) {
      PhocXdgToplevel *parent = self->xdg_toplevel->parent->base->data;
      view_set_parent (PHOC_VIEW (self), PHOC_VIEW (parent));
    }

    if (self->xdg_toplevel->requested.maximized)
      phoc_view_maximize (PHOC_VIEW (self), NULL);

    if (self->xdg_toplevel->requested.fullscreen_output)
      output = PHOC_OUTPUT (self->xdg_toplevel->requested.fullscreen_output->data);

    phoc_view_set_fullscreen (PHOC_VIEW (self),
                              self->xdg_toplevel->requested.fullscreen,
                              output);
    phoc_view_auto_maximize (PHOC_VIEW (self));
    view_set_title (PHOC_VIEW (self), self->xdg_toplevel->title);
    /* We don't do window menus or minimize */
    phoc_xdg_toplevel_set_capabilities (self,
                                        WLR_XDG_TOPLEVEL_WM_CAPABILITIES_MAXIMIZE |
                                        WLR_XDG_TOPLEVEL_WM_CAPABILITIES_FULLSCREEN);

    if (self->decoration)
      phoc_xdg_toplevel_decoration_set_mode (self->decoration);
  }

  if (!xdg_toplevel->base->surface->mapped)
    return;

  phoc_view_apply_damage (view);

  struct wlr_box size;
  get_size (view, &size);
  view_update_size (view, size.width, size.height);

  uint32_t pending_serial = self->pending_move_resize_configure_serial;
  if (pending_serial > 0 && pending_serial >= xdg_toplevel->base->current.configure_serial) {
    double x = view->box.x;
    double y = view->box.y;

    if (view->pending_move_resize.update_x) {
      if (phoc_view_is_floating (view))
        x = view->pending_move_resize.x + view->pending_move_resize.width - size.width;
      else
        x = view->pending_move_resize.x;
    }
    if (view->pending_move_resize.update_y) {
      if (phoc_view_is_floating (view))
        y = view->pending_move_resize.y + view->pending_move_resize.height - size.height;
      else
        y = view->pending_move_resize.y;
    }
    view_update_position (view, x, y);

    if (pending_serial == xdg_toplevel->base->current.configure_serial)
      self->pending_move_resize_configure_serial = 0;
  }

  struct wlr_box geometry;
  phoc_xdg_toplevel_get_geometry (self, &geometry);
  if (self->saved_geometry.x != geometry.x || self->saved_geometry.y != geometry.y) {
    float scale = phoc_view_get_scale (view);

    view_update_position (view,
                          view->box.x + (self->saved_geometry.x - geometry.x) * scale,
                          view->box.y + (self->saved_geometry.y - geometry.y) * scale);
  }
  self->saved_geometry = geometry;
}


static void
handle_destroy (struct wl_listener *listener, void *data)
{
  PhocXdgToplevel *self = wl_container_of (listener, self, destroy);

  g_signal_emit_by_name (self, "surface-destroy");
  g_object_unref (self);
}


static void
check_gtk_shell_modal (PhocXdgToplevel *self)
{
  PhocDesktop *desktop = phoc_server_get_desktop (phoc_server_get_default ());
  PhocView *view = PHOC_VIEW (self);
  PhocGtkShell *gtk_shell = phoc_desktop_get_gtk_shell (desktop);
  PhocGtkSurface *gtk_surface ;

  gtk_surface = phoc_gtk_shell_get_gtk_surface_from_wlr_surface (gtk_shell, view->wlr_surface);
  if (gtk_surface && phoc_gtk_surface_get_modal (gtk_surface))
    phoc_view_set_modal (view, TRUE);
}


static void
handle_map (struct wl_listener *listener, void *data)
{
  PhocXdgToplevel *self = wl_container_of (listener, self, map);
  PhocView *view = PHOC_VIEW (self);
  struct wlr_box box;

  get_size (view, &box);
  view->box.width = box.width;
  view->box.height = box.height;
  phoc_xdg_toplevel_get_geometry (self, &self->saved_geometry);

  phoc_view_map (view, self->xdg_toplevel->base->surface);
  phoc_view_setup (view);

  /* Catch up with gtk-shell. We need wlr_surface for that so can't do it before map */
  check_gtk_shell_modal (self);
}


static void
handle_unmap (struct wl_listener *listener, void *data)
{
  PhocXdgToplevel *self = wl_container_of (listener, self, unmap);
  phoc_view_unmap (PHOC_VIEW (self));
}


static void
handle_request_move (struct wl_listener *listener, void *data)
{
  PhocXdgToplevel *self = wl_container_of (listener, self, request_move);
  struct wlr_xdg_toplevel_move_event *e = data;
  PhocSeat *seat = phoc_seat_from_wlr_seat (e->seat->seat);
  PhocCursor *cursor = phoc_seat_get_cursor (seat);

  if (!seat || phoc_cursor_get_mode (cursor) != PHOC_CURSOR_PASSTHROUGH)
    return;

  if (e->serial != phoc_seat_get_last_button_or_touch_serial (seat)) {
    g_warning_once ("Invalid serial %" PRIu32 " (%" PRIu32 ") - rejecting move.",
                    e->serial,
                    phoc_seat_get_last_button_or_touch_serial (seat));
    return;
  }

  phoc_seat_begin_move (seat, PHOC_VIEW (self));
}


static void
handle_request_resize (struct wl_listener *listener, void *data)
{
  PhocXdgToplevel *self = wl_container_of (listener, self, request_resize);
  struct wlr_xdg_toplevel_resize_event *e = data;
  PhocSeat *seat = phoc_seat_from_wlr_seat (e->seat->seat);
  PhocCursor *cursor = phoc_seat_get_cursor (seat);

  if (!seat || phoc_cursor_get_mode (cursor) != PHOC_CURSOR_PASSTHROUGH)
    return;

  if (e->serial != phoc_seat_get_last_button_or_touch_serial (seat)) {
    g_warning_once ("Invalid serial %" PRIu32 " (%" PRIu32 ") - rejecting resize.",
                    e->serial,
                    phoc_seat_get_last_button_or_touch_serial (seat));
    return;
  }


  phoc_seat_begin_resize (seat, PHOC_VIEW (self), e->edges);
}


static void
handle_request_maximize (struct wl_listener *listener, void *data)
{
  PhocXdgToplevel *self = wl_container_of (listener, self, request_maximize);
  struct wlr_xdg_toplevel *xdg_toplevel = self->xdg_toplevel;

  if (xdg_toplevel->requested.maximized)
    phoc_view_maximize (PHOC_VIEW (self), NULL);
  else
    phoc_view_restore (PHOC_VIEW (self));
}


static void
handle_request_fullscreen (struct wl_listener *listener, void *data)
{
  PhocXdgToplevel *self = wl_container_of (listener, self, request_fullscreen);
  struct wlr_xdg_toplevel *xdg_toplevel = self->xdg_toplevel;
  PhocOutput *output = NULL;

  if (xdg_toplevel->requested.fullscreen_output)
    output = PHOC_OUTPUT (xdg_toplevel->requested.fullscreen_output->data);
  phoc_view_set_fullscreen (PHOC_VIEW (self), xdg_toplevel->requested.fullscreen, output);
}


static void
handle_set_title (struct wl_listener *listener, void *data)
{
  PhocXdgToplevel *self = wl_container_of (listener, self, set_title);

  view_set_title (PHOC_VIEW (self), self->xdg_toplevel->title);
}


static void
handle_set_app_id (struct wl_listener *listener, void *data)
{
  PhocXdgToplevel *self = wl_container_of (listener, self, set_app_id);

  phoc_view_set_app_id (PHOC_VIEW (self), self->xdg_toplevel->app_id);
}


static void
handle_set_parent (struct wl_listener *listener, void *data)
{
  PhocXdgToplevel *self = wl_container_of (listener, self, set_parent);

  if (self->xdg_toplevel->parent) {
    PhocXdgToplevel *parent = self->xdg_toplevel->parent->base->data;
    view_set_parent (PHOC_VIEW (self), &parent->view);
  } else {
    view_set_parent (PHOC_VIEW (self), NULL);
  }
}


static void
handle_new_popup (struct wl_listener *listener, void *data)
{
  PhocXdgToplevel *self = wl_container_of (listener, self, new_popup);
  struct wlr_xdg_popup *wlr_popup = data;

  phoc_xdg_popup_new (PHOC_CHILD_ROOT (self), wlr_popup);
}


static void
phoc_xdg_toplevel_constructed (GObject *object)
{
  PhocXdgToplevel *self = PHOC_XDG_TOPLEVEL (object);

  g_assert (self->xdg_toplevel);

  G_OBJECT_CLASS (phoc_xdg_toplevel_parent_class)->constructed (object);

  /* Register wlr_surface handlers */
  self->surface_commit.notify = handle_surface_commit;
  wl_signal_add (&self->xdg_toplevel->base->surface->events.commit, &self->surface_commit);

  self->map.notify = handle_map;
  wl_signal_add (&self->xdg_toplevel->base->surface->events.map, &self->map);

  self->unmap.notify = handle_unmap;
  wl_signal_add (&self->xdg_toplevel->base->surface->events.unmap, &self->unmap);

  /* Register wlr_xdg_surface handlers */
  self->destroy.notify = handle_destroy;
  wl_signal_add (&self->xdg_toplevel->events.destroy, &self->destroy);

  self->new_popup.notify = handle_new_popup;
  wl_signal_add (&self->xdg_toplevel->base->events.new_popup, &self->new_popup);

  /* Register wlr_xdg_toplevel handlers */
  self->request_move.notify = handle_request_move;
  wl_signal_add (&self->xdg_toplevel->events.request_move, &self->request_move);

  self->request_resize.notify = handle_request_resize;
  wl_signal_add (&self->xdg_toplevel->events.request_resize, &self->request_resize);

  self->request_maximize.notify = handle_request_maximize;
  wl_signal_add (&self->xdg_toplevel->events.request_maximize, &self->request_maximize);

  self->request_fullscreen.notify = handle_request_fullscreen;
  wl_signal_add (&self->xdg_toplevel->events.request_fullscreen, &self->request_fullscreen);

  self->set_title.notify = handle_set_title;
  wl_signal_add (&self->xdg_toplevel->events.set_title, &self->set_title);

  self->set_app_id.notify = handle_set_app_id;
  wl_signal_add (&self->xdg_toplevel->events.set_app_id, &self->set_app_id);

  self->set_parent.notify = handle_set_parent;
  wl_signal_add (&self->xdg_toplevel->events.set_parent, &self->set_parent);
}


static void
phoc_xdg_toplevel_finalize (GObject *object)
{
  PhocXdgToplevel *self = PHOC_XDG_TOPLEVEL (object);

  g_clear_pointer (&self->frame_done_idle, wl_event_source_remove);
  g_clear_pointer (&self->tag, g_free);

  wl_list_remove (&self->surface_commit.link);
  wl_list_remove (&self->destroy.link);
  wl_list_remove (&self->new_popup.link);
  wl_list_remove (&self->map.link);
  wl_list_remove (&self->unmap.link);
  wl_list_remove (&self->request_move.link);
  wl_list_remove (&self->request_resize.link);
  wl_list_remove (&self->request_maximize.link);
  wl_list_remove (&self->request_fullscreen.link);
  wl_list_remove (&self->set_title.link);
  wl_list_remove (&self->set_app_id.link);
  wl_list_remove (&self->set_parent.link);
  self->xdg_toplevel->base->data = NULL;

  G_OBJECT_CLASS (phoc_xdg_toplevel_parent_class)->finalize (object);
}


static void
phoc_xdg_toplevel_class_init (PhocXdgToplevelClass *klass)
{
  GObjectClass *object_class = G_OBJECT_CLASS (klass);
  PhocViewClass *view_class = PHOC_VIEW_CLASS (klass);

  object_class->constructed = phoc_xdg_toplevel_constructed;
  object_class->finalize = phoc_xdg_toplevel_finalize;
  object_class->set_property = phoc_xdg_toplevel_set_property;

  view_class->resize = resize;
  view_class->move_resize = move_resize;
  view_class->want_auto_maximize = want_auto_maximize;
  view_class->want_scaling = want_scaling;
  view_class->set_active = set_active;
  view_class->set_fullscreen = set_fullscreen;
  view_class->set_maximized = set_maximized;
  view_class->set_tiled = set_tiled;
  view_class->set_suspended = set_suspended;
  view_class->close = _close;
  view_class->for_each_surface = for_each_surface;
  view_class->get_geometry = get_geometry;
  view_class->get_wlr_surface_at = get_wlr_surface_at;
  view_class->get_pid = get_pid;

  /**
   * PhocXdgToplevel:wlr-xdg-toplevel:
   *
   * The underlying wlroots xdg-toplevel
   */
  props[PROP_WLR_XDG_TOPLEVEL] =
    g_param_spec_pointer ("wlr-xdg-toplevel", "", "",
                          G_PARAM_CONSTRUCT_ONLY | G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS);
  g_object_class_install_properties (object_class, PROP_LAST_PROP, props);
}


static void
phoc_xdg_toplevel_init (PhocXdgToplevel *self)
{
}


PhocXdgToplevel *
phoc_xdg_toplevel_new (struct wlr_xdg_toplevel *wlr_xdg_toplevel)
{
  return g_object_new (PHOC_TYPE_XDG_TOPLEVEL,
                       "wlr-xdg-toplevel", wlr_xdg_toplevel,
                       NULL);
}


void
phoc_xdg_toplevel_set_decoration (PhocXdgToplevel           *self,
                                  PhocXdgToplevelDecoration *decoration)
{
  g_assert (PHOC_IS_XDG_TOPLEVEL (self));

  self->decoration = decoration;
}


PhocXdgToplevelDecoration *
phoc_xdg_toplevel_get_decoration (PhocXdgToplevel *self)
{
  g_assert (PHOC_IS_XDG_TOPLEVEL (self));

  return self->decoration;
}


struct wlr_xdg_surface *
phoc_xdg_toplevel_get_wlr_xdg_surface (PhocXdgToplevel *self)
{
  g_assert (PHOC_IS_XDG_TOPLEVEL (self));

  return self->xdg_toplevel->base;
}


void
phoc_handle_xdg_shell_toplevel (struct wl_listener *listener, void *data)
{
  PhocDesktop *desktop = phoc_server_get_desktop (phoc_server_get_default ());
  struct wlr_xdg_toplevel *toplevel = data;
  PhocGtkShell *gtk_shell;
  PhocGtkSurface *gtk_surface;
  PhocXdgToplevel *self;

  g_assert (toplevel->base->role == WLR_XDG_SURFACE_ROLE_TOPLEVEL);
  g_debug ("new xdg toplevel: title=%s, app_id=%s", toplevel->title, toplevel->app_id);

  wlr_xdg_surface_ping (toplevel->base);
  self = phoc_xdg_toplevel_new (toplevel);

  /* Check for app-id override coming from gtk-shell */
  gtk_shell = phoc_desktop_get_gtk_shell (desktop);
  gtk_surface = phoc_gtk_shell_get_gtk_surface_from_wlr_surface (gtk_shell,
                                                                 toplevel->base->surface);
  if (gtk_surface && phoc_gtk_surface_get_app_id (gtk_surface))
    phoc_view_set_app_id (PHOC_VIEW (self), phoc_gtk_surface_get_app_id (gtk_surface));
  else
    phoc_view_set_app_id (PHOC_VIEW (self), toplevel->app_id);
}


gboolean
phoc_xdg_toplevel_is_initialized (PhocXdgToplevel *self)
{
  g_assert (PHOC_IS_XDG_TOPLEVEL (self));

  return !!self->xdg_toplevel->base->initialized;
}


void
phoc_xdg_toplevel_tag_manager_v1_handle_set_tag (struct wl_listener *listener, void *data)
{
  const struct wlr_xdg_toplevel_tag_manager_v1_set_tag_event *event = data;
  PhocXdgToplevel *self = PHOC_XDG_TOPLEVEL (event->toplevel->base->data);

  phoc_view_set_tag (PHOC_VIEW (self), event->tag);
}
