/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*

 * This file is part of the LibreOffice project.

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/.

 *

 * This file incorporates work covered by the following license notice:

 *

 *   Licensed to the Apache Software Foundation (ASF) under one or more

 *   contributor license agreements. See the NOTICE file distributed

 *   with this work for additional information regarding copyright

 *   ownership. The ASF licenses this file to you under the Apache

 *   License, Version 2.0 (the "License"); you may not use this file

 *   except in compliance with the License. You may obtain a copy of

 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .

 */

#pragma once

#include <libxml/tree.h>

#include <sal/types.h>

#include <rtl/ref.hxx>

#include <rtl/string.hxx>

#include <rtl/ustring.hxx>

#include <cppuhelper/implbase.hxx>

#include <sax/fastattribs.hxx>

#include <com/sun/star/uno/Reference.h>

#include <com/sun/star/uno/Sequence.h>

#include <com/sun/star/xml/dom/XNode.hpp>

#include <com/sun/star/xml/dom/XNodeList.hpp>

#include <com/sun/star/xml/dom/XNamedNodeMap.hpp>

#include <com/sun/star/xml/dom/NodeType.hpp>

#include <com/sun/star/xml/dom/events/XEventTarget.hpp>

#include <com/sun/star/xml/dom/events/XEvent.hpp>

#include <com/sun/star/xml/sax/XDocumentHandler.hpp>

#include <com/sun/star/xml/sax/XFastDocumentHandler.hpp>

#include <unordered_map>

namespace DOM

{

    struct Context

    {

        Context( const css::uno::Reference< css::xml::sax::XFastDocumentHandler >& i_xHandler,

                 sax_fastparser::FastTokenHandlerBase* pTokenHandler ) :

            maNamespaces( 1, std::vector<Namespace>() ),

            maNamespaceMap(101),

            mxAttribList(new sax_fastparser::FastAttributeList(pTokenHandler)),

            mxCurrentHandler(i_xHandler),

            mxDocHandler(i_xHandler),

            mxTokenHandler(pTokenHandler)

        {}

        struct Namespace

        {

            OString     maPrefix;

            sal_Int32   mnToken;

            const OString& getPrefix() const { return maPrefix; }

        };

        typedef std::vector< std::vector<Namespace> > NamespaceVectorType;

        typedef std::unordered_map< OUString, sal_Int32 > NamespaceMapType;

        /// outer vector: xml context; inner vector: current NS

        NamespaceVectorType                 maNamespaces;

        NamespaceMapType                    maNamespaceMap;

        ::rtl::Reference<sax_fastparser::FastAttributeList> mxAttribList;

        css::uno::Reference<css::xml::sax::XFastContextHandler>      mxCurrentHandler;

        css::uno::Reference<css::xml::sax::XFastDocumentHandler>     mxDocHandler;

        rtl::Reference<sax_fastparser::FastTokenHandlerBase>         mxTokenHandler;

    };

    void pushContext(Context& io_rContext);

    void popContext(Context& io_rContext);

    sal_Int32 getTokenWithPrefix( const Context& rContext, const char* xPrefix, const char* xName );

    sal_Int32 getToken( const Context& rContext, const char* xName );

    /// add namespaces on this node to context

    void addNamespaces(Context& io_rContext, xmlNodePtr pNode);

    class CDocument;

    class SAL_LOPLUGIN_ANNOTATE("crosscast") CNode

        : public cppu::WeakImplHelper< css::xml::dom::XNode, css::xml::dom::events::XEventTarget >

    {

        friend class CDocument;

        friend class CElement;

        friend class CAttributesMap;

    private:

        bool m_bUnlinked; /// node has been removed from document

    protected:

        css::xml::dom::NodeType const m_aNodeType;

        /// libxml node; NB: not const, because invalidate may reset it to 0!

        xmlNodePtr m_aNodePtr;

        ::rtl::Reference< CDocument > const m_xDocument;

        ::osl::Mutex & m_rMutex;

        // for initialization by classes derived through ImplInheritanceHelper

        CNode(CDocument const& rDocument, ::osl::Mutex const& rMutex,

                css::xml::dom::NodeType const& reNodeType, xmlNodePtr const& rpNode);

        void invalidate();

        void dispatchSubtreeModified();

        void checkNoParent(css::uno::Reference< css::xml::dom::XNode >const& xNode);

        static void checkNoParent(const xmlNodePtr pNode);

        void checkSameOwner(css::uno::Reference< css::xml::dom::XNode >const& xNode);

    public:

        virtual ~CNode() override;

        xmlNodePtr GetNodePtr() { return m_aNodePtr; }

        virtual CDocument & GetOwnerDocument();

        // recursively create SAX events

        virtual void saxify(const css::uno::Reference< css::xml::sax::XDocumentHandler >& i_xHandler);

        // recursively create SAX events

        virtual void fastSaxify( Context& io_rContext );

        // constrains child relationship between nodes based on type

        virtual bool IsChildTypeAllowed(css::xml::dom::NodeType nodeType,

                css::xml::dom::NodeType const* pReplacedNodeType);

        // ---- DOM interfaces

        /**

        Adds the node newChild to the end of the list of children of this node.

        */

        virtual css::uno::Reference< css::xml::dom::XNode > SAL_CALL

            appendChild(css::uno::Reference< css::xml::dom::XNode > const& xNewChild) override;

        /**

        Returns a duplicate of this node, i.e., serves as a generic copy

        constructor for nodes.

        */

        virtual css::uno::Reference< css::xml::dom::XNode > SAL_CALL cloneNode(sal_Bool deep) override;

        /**

        A NamedNodeMap containing the attributes of this node

        (if it is an Element) or null otherwise.

        */

        virtual css::uno::Reference< css::xml::dom::XNamedNodeMap > SAL_CALL getAttributes() override;

        /**

        A NodeList that contains all children of this node.

        */

        virtual css::uno::Reference< css::xml::dom::XNodeList > SAL_CALL getChildNodes() override;

        /**

        The first child of this node.

        */

        virtual css::uno::Reference< css::xml::dom::XNode > SAL_CALL getFirstChild() override;

        /**

        The last child of this node.

        */

        virtual css::uno::Reference< css::xml::dom::XNode > SAL_CALL getLastChild() override;

        /**

        Returns the local part of the qualified name of this node.

        */

        virtual OUString SAL_CALL getLocalName() override;

        /**

        The namespace URI of this node, or null if it is unspecified.

        */

        virtual OUString SAL_CALL getNamespaceURI() override;

        /**

        The node immediately following this node.

        */

        virtual css::uno::Reference< css::xml::dom::XNode > SAL_CALL getNextSibling() override;

        /**

        The name of this node, depending on its type; see the table above.

        -- virtual implemented by actual node types

        */

        virtual OUString SAL_CALL getNodeName() override;

        /**

        A code representing the type of the underlying object, as defined above.

        */

        virtual css::xml::dom::NodeType SAL_CALL getNodeType() override;

        /**

        The value of this node, depending on its type; see the table above.

        -- virtual implemented by actual node types

        */

        virtual OUString SAL_CALL getNodeValue() override;

        /**

        The Document object associated with this node.

        */

        virtual css::uno::Reference< css::xml::dom::XDocument > SAL_CALL getOwnerDocument() override;

        /**

        The parent of this node.

        */

        virtual css::uno::Reference< css::xml::dom::XNode > SAL_CALL getParentNode() override;

        /**

        The namespace prefix of this node, or null if it is unspecified.

        */

        virtual OUString SAL_CALL getPrefix() override;

        /**

        The node immediately preceding this node.

        */

        virtual css::uno::Reference< css::xml::dom::XNode > SAL_CALL getPreviousSibling() override;

        /**

        Returns whether this node (if it is an element) has any attributes.

        */

        virtual sal_Bool SAL_CALL hasAttributes() override;

        /**

        Returns whether this node has any children.

        */

        virtual sal_Bool SAL_CALL hasChildNodes() override;

        /**

        Inserts the node newChild before the existing child node refChild.

        */

        virtual css::uno::Reference< css::xml::dom::XNode > SAL_CALL insertBefore(

                const css::uno::Reference< css::xml::dom::XNode >& newChild, const css::uno::Reference< css::xml::dom::XNode >& refChild) override;

        /**

        Tests whether the DOM implementation implements a specific feature and

        that feature is supported by this node.

        */

        virtual sal_Bool SAL_CALL isSupported(const OUString& feature, const OUString& ver) override;

        /**

        Puts all Text nodes in the full depth of the sub-tree underneath this

        Node, including attribute nodes, into a "normal" form where only structure

        (e.g., elements, comments, processing instructions, CDATA sections, and

        entity references) separates Text nodes, i.e., there are neither adjacent

        Text nodes nor empty Text nodes.

        */

        virtual void SAL_CALL normalize() override;

        /**

        Removes the child node indicated by oldChild from the list of children,

        and returns it.

        */

        virtual css::uno::Reference< css::xml::dom::XNode > SAL_CALL removeChild(const css::uno::Reference< css::xml::dom::XNode >& oldChild) override;

        /**

        Replaces the child node oldChild with newChild in the list of children,

        and returns the oldChild node.

        */

        virtual css::uno::Reference< css::xml::dom::XNode > SAL_CALL replaceChild(

                const css::uno::Reference< css::xml::dom::XNode >& newChild, const css::uno::Reference< css::xml::dom::XNode >& oldChild) override;

        /**

        The value of this node, depending on its type; see the table above.

        */

        virtual void SAL_CALL setNodeValue(const OUString& nodeValue) override;

        /**

        The namespace prefix of this node, or null if it is unspecified.

        */

        virtual void SAL_CALL setPrefix(const OUString& prefix) override;

        // --- XEventTarget

        virtual void SAL_CALL addEventListener(const OUString& eventType,

            const css::uno::Reference< css::xml::dom::events::XEventListener >& listener,

            sal_Bool useCapture) override;

        virtual void SAL_CALL removeEventListener(const OUString& eventType,

            const css::uno::Reference< css::xml::dom::events::XEventListener >& listener,

            sal_Bool useCapture) override;

        virtual sal_Bool SAL_CALL dispatchEvent(const css::uno::Reference< css::xml::dom::events::XEvent >& evt) override;

    };

    /// eliminate redundant namespace declarations

    void nscleanup(const xmlNodePtr aNode, const xmlNodePtr aParent);

}

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