Major plugin refactor and cleanup.

Switched to POCO library for unified platform/library interface.
Deprecated the external module API. It was creating more problems than solving.
Removed most built-in libraries in favor of system libraries for easier maintenance.
Cleaned and secured code with help from static analyzers.

vendor/POCO/XML/include/Poco/DOM/AbstractNode.h

@@ -0,0 +1,125 @@
+//
+// AbstractNode.h
+//
+// Library: XML
+// Package: DOM
+// Module:  DOM
+//
+// Definition of the AbstractNode class.
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef DOM_AbstractNode_INCLUDED
+#define DOM_AbstractNode_INCLUDED
+
+
+#include "Poco/XML/XML.h"
+#include "Poco/DOM/Node.h"
+#include "Poco/DOM/MutationEvent.h"
+#include "Poco/XML/XMLString.h"
+
+
+namespace Poco {
+namespace XML {
+
+
+class AbstractContainerNode;
+class Attr;
+class EventDispatcher;
+
+
+class XML_API AbstractNode: public Node
+	/// AbstractNode provides a basic implementation
+	/// of the Node interface for all types of nodes
+	/// that do not contain other nodes.
+{
+public:
+	// Node
+	const XMLString& nodeName() const;
+	const XMLString& getNodeValue() const;
+	void setNodeValue(const XMLString& value);
+	Node* parentNode() const;
+	NodeList* childNodes() const;
+	Node* firstChild() const;
+	Node* lastChild() const;
+	Node* previousSibling() const;
+	Node* nextSibling() const;
+	NamedNodeMap* attributes() const;
+	Document* ownerDocument() const;
+	Node* insertBefore(Node* newChild, Node* refChild);
+	Node* replaceChild(Node* newChild, Node* oldChild);
+	Node* removeChild(Node* oldChild);
+	Node* appendChild(Node* newChild);
+	bool hasChildNodes() const;
+	Node* cloneNode(bool deep) const;
+	void normalize();
+	bool isSupported(const XMLString& feature, const XMLString& version) const;
+	const XMLString& namespaceURI() const;
+	XMLString prefix() const;
+	const XMLString& localName() const;
+	bool hasAttributes() const;
+
+	// EventTarget
+	void addEventListener(const XMLString& type, EventListener* listener, bool useCapture);
+	void removeEventListener(const XMLString& type, EventListener* listener, bool useCapture);
+	bool dispatchEvent(Event* evt);
+
+	// Extensions
+	XMLString innerText() const;
+	Node* getNodeByPath(const XMLString& path) const;
+	Node* getNodeByPathNS(const XMLString& path, const NSMap& nsMap) const;
+
+	virtual void autoRelease();
+
+protected:
+	AbstractNode(Document* pOwnerDocument);
+	AbstractNode(Document* pOwnerDocument, const AbstractNode& node);
+	~AbstractNode();
+
+	virtual Node* copyNode(bool deep, Document* pOwnerDocument) const = 0;
+
+	virtual bool events() const;
+	virtual bool eventsSuspended() const;
+	void captureEvent(Event* evt);
+	void bubbleEvent(Event* evt);
+	void dispatchSubtreeModified();
+	void dispatchNodeInserted();
+	void dispatchNodeRemoved();
+	virtual void dispatchNodeRemovedFromDocument();
+	virtual void dispatchNodeInsertedIntoDocument();
+	void dispatchAttrModified(Attr* pAttr, MutationEvent::AttrChangeType changeType, const XMLString& prevValue, const XMLString& newValue);
+	void dispatchCharacterDataModified(const XMLString& prevValue, const XMLString& newValue);
+	void setOwnerDocument(Document* pOwnerDocument);
+
+	static const XMLString EMPTY_STRING;
+
+private:
+	AbstractNode();
+
+	AbstractContainerNode* _pParent;
+	AbstractNode*          _pNext;
+	Document*              _pOwner;
+	EventDispatcher*       _pEventDispatcher;
+
+	static const XMLString NODE_NAME;
+
+	friend class AbstractContainerNode;
+	friend class Document;
+	friend class DocumentFragment;
+	friend class Element;
+	friend class Attr;
+	friend class CharacterData;
+	friend class DOMBuilder;
+	friend class NodeAppender;
+};
+
+
+} } // namespace Poco::XML
+
+
+#endif // DOM_AbstractNode_INCLUDED