ext-foreign-toplevel-list: Implement protocol

References: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4543

include/sway/server.h

@@ -7,6 +7,7 @@
 #include <wlr/render/wlr_renderer.h>
 #include <wlr/types/wlr_compositor.h>
 #include <wlr/types/wlr_data_device.h>
+#include <wlr/types/wlr_ext_foreign_toplevel_list_v1.h>
 #include <wlr/types/wlr_input_method_v2.h>
 #include <wlr/types/wlr_foreign_toplevel_management_v1.h>
 #include <wlr/types/wlr_drm_lease_v1.h>
@@ -116,6 +117,7 @@ struct sway_server {
 	struct wl_listener output_power_manager_set_mode;
 	struct wlr_input_method_manager_v2 *input_method;
 	struct wlr_text_input_manager_v3 *text_input;
+	struct wlr_ext_foreign_toplevel_list_v1 *foreign_toplevel_list;
 	struct wlr_foreign_toplevel_manager_v1 *foreign_toplevel_manager;
 	struct wlr_content_type_manager_v1 *content_type_manager_v1;
 	struct wlr_data_control_manager_v1 *data_control_manager_v1;

include/sway/tree/view.h

@@ -84,6 +84,9 @@ struct sway_view {
 	// transaction state. Updated on every commit.
 	struct wlr_box geometry;
 
+	struct wlr_ext_foreign_toplevel_handle_v1 *ext_foreign_toplevel;
+	struct wl_listener ext_foreign_destroy;
+
 	struct wlr_foreign_toplevel_handle_v1 *foreign_toplevel;
 	struct wl_listener foreign_activate_request;
 	struct wl_listener foreign_fullscreen_request;
@@ -284,6 +287,8 @@ struct sway_view *view_from_wlr_xwayland_surface(
 #endif
 struct sway_view *view_from_wlr_surface(struct wlr_surface *surface);
 
+void view_update_app_id(struct sway_view *view);
+
 /**
  * Re-read the view's title property and update any relevant title bars.
  * The force argument makes it recreate the title bars even if the title hasn't

sway/desktop/xdg_shell.c

@@ -337,6 +337,7 @@ static void handle_set_app_id(struct wl_listener *listener, void *data) {
 	struct sway_xdg_shell_view *xdg_shell_view =
 		wl_container_of(listener, xdg_shell_view, set_app_id);
 	struct sway_view *view = &xdg_shell_view->view;
+	view_update_app_id(view);
 	view_execute_criteria(view);
 }
 

sway/server.c

@@ -60,6 +60,7 @@
 
 #define SWAY_XDG_SHELL_VERSION 2
 #define SWAY_LAYER_SHELL_VERSION 4
+#define SWAY_FOREIGN_TOPLEVEL_LIST_VERSION 1
 
 bool allow_unsupported_gpu = false;
 
@@ -93,6 +94,7 @@ static bool is_privileged(const struct wl_global *global) {
 		global == server.output_manager_v1->global ||
 		global == server.output_power_manager_v1->global ||
 		global == server.input_method->global ||
+		global == server.foreign_toplevel_list->global ||
 		global == server.foreign_toplevel_manager->global ||
 		global == server.data_control_manager_v1->global ||
 		global == server.screencopy_manager_v1->global ||
@@ -289,6 +291,8 @@ bool server_init(struct sway_server *server) {
 		&server->output_power_manager_set_mode);
 	server->input_method = wlr_input_method_manager_v2_create(server->wl_display);
 	server->text_input = wlr_text_input_manager_v3_create(server->wl_display);
+	server->foreign_toplevel_list =
+		wlr_ext_foreign_toplevel_list_v1_create(server->wl_display, SWAY_FOREIGN_TOPLEVEL_LIST_VERSION);
 	server->foreign_toplevel_manager =
 		wlr_foreign_toplevel_manager_v1_create(server->wl_display);
 

sway/tree/view.c

@@ -582,6 +582,14 @@ static struct sway_workspace *select_workspace(struct sway_view *view) {
 	return NULL;
 }
 
+static void update_ext_foreign_toplevel(struct sway_view *view) {
+	struct wlr_ext_foreign_toplevel_handle_v1_state toplevel_state = {
+		.app_id = view_get_app_id(view),
+		.title = view_get_title(view),
+	};
+	wlr_ext_foreign_toplevel_handle_v1_update_state(view->ext_foreign_toplevel, &toplevel_state);
+}
+
 static bool should_focus(struct sway_view *view) {
 	struct sway_seat *seat = input_manager_current_seat();
 	struct sway_container *prev_con = seat_get_focused_container(seat);
@@ -751,6 +759,15 @@ void view_map(struct sway_view *view, struct wlr_surface *wlr_surface,
 		}
 	}
 
+	struct wlr_ext_foreign_toplevel_handle_v1_state foreign_toplevel_state = {
+		.app_id = view_get_app_id(view),
+		.title = view_get_title(view),
+	};
+	view->ext_foreign_toplevel =
+		wlr_ext_foreign_toplevel_handle_v1_create(server.foreign_toplevel_list, &foreign_toplevel_state);
+	wl_signal_add(&view->ext_foreign_toplevel->events.destroy,
+			&view->ext_foreign_destroy);
+
 	view->foreign_toplevel =
 		wlr_foreign_toplevel_handle_v1_create(server.foreign_toplevel_manager);
 	view->foreign_activate_request.notify = handle_foreign_activate_request;
@@ -828,6 +845,10 @@ void view_map(struct sway_view *view, struct wlr_surface *wlr_surface,
 		input_manager_set_focus(&view->container->node);
 	}
 
+	if (view->ext_foreign_toplevel) {
+		update_ext_foreign_toplevel(view);
+	}
+
 	const char *app_id;
 	const char *class;
 	if ((app_id = view_get_app_id(view)) != NULL) {
@@ -847,6 +868,11 @@ void view_unmap(struct sway_view *view) {
 		view->urgent_timer = NULL;
 	}
 
+	if (view->ext_foreign_toplevel) {
+		wlr_ext_foreign_toplevel_handle_v1_destroy(view->ext_foreign_toplevel);
+		view->ext_foreign_toplevel = NULL;
+	}
+
 	if (view->foreign_toplevel) {
 		wlr_foreign_toplevel_handle_v1_destroy(view->foreign_toplevel);
 		view->foreign_toplevel = NULL;
@@ -1014,6 +1040,18 @@ static size_t parse_title_format(struct sway_view *view, char *buffer) {
 	return len;
 }
 
+void view_update_app_id(struct sway_view *view) {
+	const char *app_id = view_get_app_id(view);
+
+	if (view->foreign_toplevel && app_id) {
+		wlr_foreign_toplevel_handle_v1_set_app_id(view->foreign_toplevel, app_id);
+	}
+
+	if (view->ext_foreign_toplevel) {
+		update_ext_foreign_toplevel(view);
+	}
+}
+
 void view_update_title(struct sway_view *view, bool force) {
 	const char *title = view_get_title(view);
 
@@ -1060,6 +1098,10 @@ void view_update_title(struct sway_view *view, bool force) {
 	if (view->foreign_toplevel && title) {
 		wlr_foreign_toplevel_handle_v1_set_title(view->foreign_toplevel, title);
 	}
+
+	if (view->ext_foreign_toplevel) {
+		update_ext_foreign_toplevel(view);
+	}
 }
 
 bool view_is_visible(struct sway_view *view) {