diyac/layer.c

static void layer_surface_commit(struct wl_listener *listener, void *data)
{
	struct diyac_layer_surface *layer =
		wl_container_of(listener, layer, surface_commit);
	struct wlr_layer_surface_v1 *layer_surface =
		layer->scene_layer_surface->layer_surface;
	struct wlr_output *wlr_output =
		layer->scene_layer_surface->layer_surface->output;

	if (!wlr_output) {
		return;
	}

	uint32_t committed = layer_surface->current.committed;
	struct diyac_output *output = (struct diyac_output *)wlr_output->data;

	/* Process layer change */
	if (committed & WLR_LAYER_SURFACE_V1_STATE_LAYER) {
		wlr_scene_node_reparent(&layer->scene_layer_surface->tree->node,
			output->layer_tree[layer_surface->current.layer]);
	}
	/* Process keyboard-interactivity change */
	if (committed & WLR_LAYER_SURFACE_V1_STATE_KEYBOARD_INTERACTIVITY) {
		//process_keyboard_interactivity(layer);
	}

	if (committed || layer->mapped != layer_surface->surface->mapped) {
		layer->mapped = layer_surface->surface->mapped;
		//output_update_usable_area(output);
		/*
		 * Update cursor focus here to ensure we
		 * enter a new/moved/resized layer surface.
		 */
		//cursor_update_focus(layer->server);
	}
}
static void
layer_surface_unmap(struct wl_listener *listener, void *data)
{
	struct diyac_layer_surface *layer = wl_container_of(listener, layer, unmap);
	struct wlr_layer_surface_v1 *layer_surface =
		layer->scene_layer_surface->layer_surface;
	if (layer_surface->output) {
		//output_update_usable_area(layer_surface->output->data);
	}
	struct wlr_seat *seat = layer->server->seat;
	//if (seat->focused_layer == layer_surface) {
		//seat_set_focus_layer(seat, NULL);
	//}
}

static void layer_surface_map(struct wl_listener *listener, void *data)
{
	struct diyac_layer_surface *layer = wl_container_of(listener, layer, map);
	struct wlr_output *wlr_output =
		layer->scene_layer_surface->layer_surface->output;
	if (wlr_output) {
		//output_update_usable_area(wlr_output->data);
	}
	/*
	 * Since moving to the wlroots scene-graph API, there is no need to
	 * call wlr_surface_send_enter() from here since that will be done
	 * automatically based on the position of the surface and outputs in
	 * the scene. See wlr_scene_surface_create() documentation.
	 */

	//process_keyboard_interactivity(layer);
}
static void
layer_surface_node_destroy(struct wl_listener *listener, void *data)
{
	struct diyac_layer_surface *layer =
		wl_container_of(listener, layer, node_destroy);

	/*
	 * TODO: Determine if this layer is being used by an exclusive client.
	 * If it is, try and find another layer owned by this client to pass
	 * focus to.
	 */

	wl_list_remove(&layer->map.link);
	wl_list_remove(&layer->unmap.link);
	wl_list_remove(&layer->surface_commit.link);
	wl_list_remove(&layer->new_popup.link);
	wl_list_remove(&layer->output_destroy.link);
	wl_list_remove(&layer->node_destroy.link);
	free(layer);
}
static void
layer_surface_output_destroy(struct wl_listener *listener, void *data)
{
	struct diyac_layer_surface *layer =
		wl_container_of(listener, layer, output_destroy);
	layer->scene_layer_surface->layer_surface->output = NULL;
	wlr_layer_surface_v1_destroy(layer->scene_layer_surface->layer_surface);
}
/* This popup's parent is a layer popup */
static void
layer_surface_new_popup(struct wl_listener *listener, void *data)
{
	/*struct lab_layer_popup *lab_layer_popup =
		wl_container_of(listener, lab_layer_popup, new_popup);
	struct wlr_xdg_popup *wlr_popup = data;
	struct lab_layer_popup *new_popup = create_popup(wlr_popup,
		lab_layer_popup->scene_tree);
	new_popup->output_toplevel_sx_box =
		lab_layer_popup->output_toplevel_sx_box;*/
}
static void server_new_layer_surface(struct wl_listener *listener, void *data)
{
	struct diyac_server *server = wl_container_of(listener, server, new_layer_surface);
	struct wlr_layer_surface_v1 *layer_surface = data;

	if (!layer_surface->output) {
		struct wlr_output *output = wlr_output_layout_output_at(
			server->output_layout, server->seat.cursor->x,
			server->seat.cursor->y);
		if (!output) {
			wlr_log(WLR_INFO,
				"No output available to assign layer surface");
			wlr_layer_surface_v1_destroy(layer_surface);
			return;
		}
		layer_surface->output = output;
	}

	struct diyac_layer_surface *surface = calloc(1, sizeof(*surface));

	struct diyac_output *output = layer_surface->output->data;

	struct wlr_scene_tree *selected_layer =
		output->layer_tree[layer_surface->current.layer];

	surface->scene_layer_surface = wlr_scene_layer_surface_v1_create(
		selected_layer, layer_surface);
	if (!surface->scene_layer_surface) {
		wlr_layer_surface_v1_destroy(layer_surface);
		wlr_log(WLR_ERROR, "could not create layer surface");
		return;
	}

	//node_descriptor_create(&surface->scene_layer_surface->tree->node,
	//	LAB_NODE_DESC_LAYER_SURFACE, surface);

	surface->server = server;
	surface->scene_layer_surface->layer_surface = layer_surface;

	surface->surface_commit.notify = layer_surface_commit;
	wl_signal_add(&layer_surface->surface->events.commit,
		&surface->surface_commit);

	surface->map.notify = layer_surface_map;
	wl_signal_add(&layer_surface->surface->events.map, &surface->map);

	surface->unmap.notify = layer_surface_unmap;
	wl_signal_add(&layer_surface->surface->events.unmap, &surface->unmap);

	surface->new_popup.notify = layer_surface_new_popup;
	wl_signal_add(&layer_surface->events.new_popup, &surface->new_popup);

	surface->output_destroy.notify = layer_surface_output_destroy;
	wl_signal_add(&layer_surface->output->events.destroy,
		&surface->output_destroy);

	surface->node_destroy.notify = layer_surface_node_destroy;
	wl_signal_add(&surface->scene_layer_surface->tree->node.events.destroy,
		&surface->node_destroy);

	/*
	 * Temporarily set the layer's current state to pending so that
	 * it can easily be arranged.
	 */
	//struct wlr_layer_surface_v1_state old_state = layer_surface->current;
	//layer_surface->current = layer_surface->pending;
	//output_update_usable_area(output);
	//layer_surface->current = old_state;
}