[Compatibility] Add stub for VisualShaderNodeComment

doc/classes/VisualShaderNodeComment.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<class name="VisualShaderNodeComment" inherits="VisualShaderNodeFrame" deprecated="This class has no function anymore and only exists for compatibility." xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
+	<brief_description>
+		Only exists for compatibility. Use [VisualShaderNodeFrame] as a replacement.
+	</brief_description>
+	<description>
+		This node was replaced by [VisualShaderNodeFrame] and only exists to preserve compatibility. In the [VisualShader] editor it behaves exactly like [VisualShaderNodeFrame].
+	</description>
+	<tutorials>
+	</tutorials>
+	<members>
+		<member name="description" type="String" setter="set_description" getter="get_description" default="&quot;&quot;">
+			This property only exists to preserve data authored in earlier versions of Godot. It has currently no function.
+		</member>
+	</members>
+</class>

misc/extension_api_validation/4.2-stable.expected

@@ -256,9 +256,9 @@ Compatibility methods registered.
 
 GH-88014
 --------
-Validate extension JSON: API was removed: classes/VisualShaderNodeComment
+Validate extension JSON: API was removed: classes/VisualShaderNodeComment/methods/get_title
-
+Validate extension JSON: API was removed: classes/VisualShaderNodeComment/methods/set_title
-Removed VisualShaderNodeComment, which is replaced by VisualShaderNodeFrame.
+Validate extension JSON: API was removed: classes/VisualShaderNodeComment/properties/title
 
 
 GH-87888

scene/register_scene_types.cpp

@@ -657,6 +657,9 @@ void register_scene_types() {
 	GDREGISTER_ABSTRACT_CLASS(VisualShaderNodeConstant);
 	GDREGISTER_ABSTRACT_CLASS(VisualShaderNodeVectorBase);
 	GDREGISTER_CLASS(VisualShaderNodeFrame);
+#ifndef DISABLE_DEPRECATED
+	GDREGISTER_CLASS(VisualShaderNodeComment); // Deprecated, just for compatibility.
+#endif
 	GDREGISTER_CLASS(VisualShaderNodeFloatConstant);
 	GDREGISTER_CLASS(VisualShaderNodeIntConstant);
 	GDREGISTER_CLASS(VisualShaderNodeUIntConstant);

scene/resources/visual_shader.cpp

@@ -4206,7 +4206,7 @@ VisualShaderNodeResizableBase::VisualShaderNodeResizableBase() {
 	set_allow_v_resize(true);
 }
 
-////////////// Comment
+////////////// Frame
 
 String VisualShaderNodeFrame::get_caption() const {
 	return title;
@@ -4323,6 +4323,25 @@ void VisualShaderNodeFrame::_bind_methods() {
 VisualShaderNodeFrame::VisualShaderNodeFrame() {
 }
 
+////////////// Comment (Deprecated)
+
+#ifndef DISABLE_DEPRECATED
+void VisualShaderNodeComment::_bind_methods() {
+	ClassDB::bind_method(D_METHOD("set_description", "description"), &VisualShaderNodeComment::set_description);
+	ClassDB::bind_method(D_METHOD("get_description"), &VisualShaderNodeComment::get_description);
+
+	ADD_PROPERTY(PropertyInfo(Variant::STRING, "description"), "set_description", "get_description");
+}
+
+void VisualShaderNodeComment::set_description(const String &p_description) {
+	description = p_description;
+}
+
+String VisualShaderNodeComment::get_description() const {
+	return description;
+}
+#endif
+
 ////////////// GroupBase
 
 void VisualShaderNodeGroupBase::set_inputs(const String &p_inputs) {

scene/resources/visual_shader.h

@@ -767,6 +767,28 @@ public:
 	VisualShaderNodeFrame();
 };
 
+#ifndef DISABLE_DEPRECATED
+// Deprecated, for compatibility only.
+class VisualShaderNodeComment : public VisualShaderNodeFrame {
+	GDCLASS(VisualShaderNodeComment, VisualShaderNodeFrame);
+
+	String description;
+
+protected:
+	static void _bind_methods();
+
+public:
+	virtual String get_caption() const override { return "Comment(Deprecated)"; }
+
+	virtual Category get_category() const override { return CATEGORY_NONE; }
+
+	void set_description(const String &p_description);
+	String get_description() const;
+
+	VisualShaderNodeComment() {}
+};
+#endif
+
 class VisualShaderNodeGroupBase : public VisualShaderNodeResizableBase {
 	GDCLASS(VisualShaderNodeGroupBase, VisualShaderNodeResizableBase);