types: add wlr_xdg_foreign_registry

types/meson.build

@@ -66,3 +66,9 @@ wlr_files += files(
 	'wlr_xdg_decoration_v1.c',
 	'wlr_xdg_output_v1.c',
 )
+
+if conf_data.get('WLR_HAS_XDG_FOREIGN', 0) == 1
+	wlr_files += files(
+		'wlr_xdg_foreign_registry.c',
+	)
+endif

types/wlr_xdg_foreign_registry.c

@@ -0,0 +1,73 @@
+#include <wlr/types/wlr_xdg_foreign_registry.h>
+#include "util/signal.h"
+#include "util/uuid.h"
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+
+bool wlr_xdg_foreign_exported_init(
+		struct wlr_xdg_foreign_exported *exported,
+		struct wlr_xdg_foreign_registry *registry) {
+	do {
+		if (!generate_uuid(exported->handle)) {
+			return false;
+		}
+	} while (wlr_xdg_foreign_registry_find_by_handle(registry, exported->handle) != NULL);
+
+	exported->registry = registry;
+	wl_list_insert(&registry->exported_surfaces, &exported->link);
+
+	wl_signal_init(&exported->events.destroy);
+	return true;
+}
+
+struct wlr_xdg_foreign_exported *wlr_xdg_foreign_registry_find_by_handle(
+		struct wlr_xdg_foreign_registry *registry, const char *handle) {
+	if (handle == NULL || strlen(handle) >= WLR_XDG_FOREIGN_HANDLE_SIZE) {
+		return NULL;
+	}
+
+	struct wlr_xdg_foreign_exported *exported;
+	wl_list_for_each(exported, &registry->exported_surfaces, link) {
+		if (strcmp(handle, exported->handle) == 0) {
+			return exported;
+		}
+	}
+
+	return NULL;
+}
+
+void wlr_xdg_foreign_exported_finish(struct wlr_xdg_foreign_exported *surface) {
+	wlr_signal_emit_safe(&surface->events.destroy, NULL);
+	surface->registry = NULL;
+	wl_list_remove(&surface->link);
+	wl_list_init(&surface->link);
+}
+
+static void foreign_registry_handle_display_destroy(struct wl_listener *listener,
+		void *data) {
+	struct wlr_xdg_foreign_registry *registry =
+		wl_container_of(listener, registry, display_destroy);
+
+	wlr_signal_emit_safe(&registry->events.destroy, NULL);
+
+	// Implementations are supposed to remove all surfaces
+	assert(wl_list_empty(&registry->exported_surfaces));
+	free(registry);
+}
+
+
+struct wlr_xdg_foreign_registry *wlr_xdg_foreign_registry_create(
+		struct wl_display *display) {
+	struct wlr_xdg_foreign_registry *registry = calloc(1, sizeof(*registry));
+	if (!registry) {
+		return NULL;
+	}
+
+	registry->display_destroy.notify = foreign_registry_handle_display_destroy;
+	wl_display_add_destroy_listener(display, &registry->display_destroy);
+
+	wl_list_init(&registry->exported_surfaces);
+	wl_signal_init(&registry->events.destroy);
+	return registry;
+}