Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibWeb/HTML/Scripting/TemporaryExecutionContext.h

@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2023, Tim Flynn <trflynn89@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibJS/Heap/GCPtr.h>
+#include <LibWeb/Forward.h>
+
+namespace Web::HTML {
+
+// When JS is run from outside the context of any user script, we currently do not have a running execution context.
+// This results in a crash when we access VM::running_execution_context(). This is a spec issue. Until it is resolved,
+// this is a workaround to temporarily push an execution context.
+class TemporaryExecutionContext {
+public:
+    enum class CallbacksEnabled {
+        No,
+        Yes,
+    };
+
+    explicit TemporaryExecutionContext(JS::Realm&, CallbacksEnabled = CallbacksEnabled::No);
+    ~TemporaryExecutionContext();
+
+private:
+    JS::NonnullGCPtr<JS::Realm> m_realm;
+    CallbacksEnabled m_callbacks_enabled { CallbacksEnabled::No };
+};
+
+}