LibWeb: Add CDATASection

Not used for anything currently other than exposing it on the Window
object. This allows Web Components Polyfills to patch its prototype.

Userland/Libraries/LibWeb/DOM/CDATASection.cpp

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2022, Luke Wilde <lukew@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibWeb/DOM/CDATASection.h>
+
+namespace Web::DOM {
+
+CDATASection::CDATASection(Document& document, String const& data)
+    : Text(document, NodeType::CDATA_SECTION_NODE, data)
+{
+}
+
+CDATASection::~CDATASection()
+{
+}
+
+}

Userland/Libraries/LibWeb/DOM/CDATASection.h

@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2022, Luke Wilde <lukew@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/RefCounted.h>
+#include <LibWeb/DOM/Text.h>
+
+namespace Web::DOM {
+
+class CDATASection final : public Text {
+public:
+    using WrapperType = Bindings::CDATASectionWrapper;
+
+    CDATASection(Document&, String const&);
+    virtual ~CDATASection() override;
+
+    // ^Node
+    virtual FlyString node_name() const override { return "#cdata-section"; }
+};
+
+template<>
+inline bool Node::fast_is<CDATASection>() const { return is_cdata_section(); }
+
+}

Userland/Libraries/LibWeb/DOM/CDATASection.idl

@@ -0,0 +1,3 @@
+[Exposed=Window]
+interface CDATASection : Text {
+};

Userland/Libraries/LibWeb/DOM/Node.h

@@ -72,6 +72,7 @@ public:
     bool is_parent_node() const { return is_element() || is_document() || is_document_fragment(); }
     bool is_slottable() const { return is_element() || is_text(); }
     bool is_attribute() const { return type() == NodeType::ATTRIBUTE_NODE; }
+    bool is_cdata_section() const { return type() == NodeType::CDATA_SECTION_NODE; }
     virtual bool is_shadow_root() const { return false; }
 
     virtual bool requires_svg_container() const { return false; }

Userland/Libraries/LibWeb/DOM/Text.cpp

@@ -17,6 +17,11 @@ Text::Text(Document& document, String const& data)
 {
 }
 
+Text::Text(Document& document, NodeType type, String const& data)
+    : CharacterData(document, type, data)
+{
+}
+
 // https://dom.spec.whatwg.org/#dom-text-text
 NonnullRefPtr<Text> Text::create_with_global_object(Bindings::WindowObject& window, String const& data)
 {

Userland/Libraries/LibWeb/DOM/Text.h

@@ -12,7 +12,7 @@
 
 namespace Web::DOM {
 
-class Text final : public CharacterData {
+class Text : public CharacterData {
 public:
     using WrapperType = Bindings::TextWrapper;
 
@@ -32,6 +32,9 @@ public:
 
     ExceptionOr<NonnullRefPtr<Text>> split_text(size_t offset);
 
+protected:
+    Text(Document&, NodeType, String const&);
+
 private:
     WeakPtr<HTML::HTMLInputElement> m_owner_input_element;