LibIDL+LibWeb: Move parse_exposure_set from code generator to LibIDL

Author: https://github.com/bplaat
Commit: da620d6ccf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4535
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/trflynn89

Libraries/LibIDL/ExposedTo.h

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2022, Andrew Kaster <akaster@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibIDL/Types.h>
+
+namespace IDL {
+
+enum ExposedTo {
+    Nobody = 0x0,
+    DedicatedWorker = 0x1,
+    SharedWorker = 0x2,
+    ServiceWorker = 0x4,
+    AudioWorklet = 0x8,
+    Window = 0x10,
+    ShadowRealm = 0x20,
+    Worklet = 0x40,
+    AllWorkers = DedicatedWorker | SharedWorker | ServiceWorker | AudioWorklet, // FIXME: Is "AudioWorklet" a Worker? We'll assume it is for now (here, and line below)
+    All = AllWorkers | Window | ShadowRealm | Worklet,
+};
+AK_ENUM_BITWISE_OPERATORS(ExposedTo);
+
+ErrorOr<ExposedTo> parse_exposure_set(StringView interface_name, StringView exposed);
+
+}