/* -*- 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 .

 */

#include "characterdata.hxx"

#include "document.hxx"

#include <eventdispatcher.hxx>

#include <string.h>

#include <memory>

#include <osl/diagnose.h>

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

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

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

using namespace css::uno;

using namespace css::xml::dom;

using namespace css::xml::dom::events;

namespace DOM

{

    CCharacterData::CCharacterData(

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

            NodeType const& reNodeType, xmlNodePtr const& rpNode)

        : CCharacterData_Base(rDocument, rMutex, reNodeType, rpNode)

    {

    }

    void CCharacterData::dispatchEvent_Impl(::osl::ClearableMutexGuard& guard,

            OUString const& prevValue, OUString const& newValue)

    {

        CDocument& rDocument(GetOwnerDocument());

        if (!rDocument.GetEventDispatcher().hasListeners())

            return;

        guard.clear(); // release mutex before calling event handlers

        Reference< XDocumentEvent > docevent(getOwnerDocument(), UNO_QUERY);

        Reference< XMutationEvent > event(docevent->createEvent(

            u"DOMCharacterDataModified"_ustr), UNO_QUERY);

        event->initMutationEvent(

                u"DOMCharacterDataModified"_ustr,

                true, false, Reference< XNode >(),

                prevValue, newValue, OUString(), AttrChangeType(0) );

        dispatchEvent(event);

        dispatchSubtreeModified();

    }

    /**

    Append the string to the end of the character data of the node.

    */

    void SAL_CALL CCharacterData::appendData(const OUString& arg)

    {

        ::osl::ClearableMutexGuard guard(m_rMutex);

        if (m_aNodePtr != nullptr)

        {

            OUString oldValue(reinterpret_cast<char*>(m_aNodePtr->content), strlen(reinterpret_cast<char*>(m_aNodePtr->content)), RTL_TEXTENCODING_UTF8);

            xmlNodeAddContent(m_aNodePtr, reinterpret_cast<const xmlChar*>(OUStringToOString(arg, RTL_TEXTENCODING_UTF8).getStr()));

            OUString newValue(reinterpret_cast<char*>(m_aNodePtr->content), strlen(reinterpret_cast<char*>(m_aNodePtr->content)), RTL_TEXTENCODING_UTF8);

            dispatchEvent_Impl(guard, oldValue, newValue);

        }

    }

    /**

    Remove a range of 16-bit units from the node.

    */

    void SAL_CALL CCharacterData::deleteData(sal_Int32 offset, sal_Int32 count)

    {

        ::osl::ClearableMutexGuard guard(m_rMutex);

        if (m_aNodePtr == nullptr)

            return;

        // get current data

        std::shared_ptr<xmlChar const> const pContent(

            xmlNodeGetContent(m_aNodePtr), xmlFree);

        std::string_view aData(reinterpret_cast<char const*>(pContent.get()));

        OUString tmp(OStringToOUString(aData, RTL_TEXTENCODING_UTF8));

        if (offset > tmp.getLength() || offset < 0 || count < 0) {

            DOMException e;

            e.Code = DOMExceptionType_INDEX_SIZE_ERR;

            throw e;

        }

        if ((offset+count) > tmp.getLength())

            count = tmp.getLength() - offset;

        OUString tmp2 = OUString::Concat(tmp.subView(0, offset)) + tmp.subView(offset+count);

        OUString oldValue(reinterpret_cast<char*>(m_aNodePtr->content), strlen(reinterpret_cast<char*>(m_aNodePtr->content)), RTL_TEXTENCODING_UTF8);

        xmlNodeSetContent(m_aNodePtr, reinterpret_cast<const xmlChar*>(OUStringToOString(tmp2, RTL_TEXTENCODING_UTF8).getStr()));

        OUString newValue(reinterpret_cast<char*>(m_aNodePtr->content), strlen(reinterpret_cast<char*>(m_aNodePtr->content)), RTL_TEXTENCODING_UTF8);

        dispatchEvent_Impl(guard, oldValue, newValue);

    }

    /**

    Return the character data of the node that implements this interface.

    */

    OUString SAL_CALL CCharacterData::getData()

    {

        ::osl::MutexGuard const g(m_rMutex);

        OUString aData;

        if (m_aNodePtr != nullptr)

        {

            OSL_ENSURE(m_aNodePtr->content, "character data node with NULL content, please inform lars.oppermann@sun.com!");

            if (m_aNodePtr->content != nullptr)

            {

                aData = OUString(reinterpret_cast<char*>(m_aNodePtr->content), strlen(reinterpret_cast<char*>(m_aNodePtr->content)),  RTL_TEXTENCODING_UTF8);

            }

        }

        return aData;

    }

    /**

    The number of 16-bit units that are available through data and the

    substringData method below.

    */

    sal_Int32 SAL_CALL CCharacterData::getLength()

    {

        ::osl::MutexGuard const g(m_rMutex);

        sal_Int32 length = 0;

        if (m_aNodePtr != nullptr)

        {

             OUString aData(reinterpret_cast<char*>(m_aNodePtr->content), strlen(reinterpret_cast<char*>(m_aNodePtr->content)),  RTL_TEXTENCODING_UTF8);

             length = aData.getLength();

        }

        return length;

    }

    /**

    Insert a string at the specified 16-bit unit offset.

    */

    void SAL_CALL CCharacterData::insertData(sal_Int32 offset, const OUString& arg)

    {

        ::osl::ClearableMutexGuard guard(m_rMutex);

        if (m_aNodePtr == nullptr)

            return;

        // get current data

        std::shared_ptr<xmlChar const> const pContent(

            xmlNodeGetContent(m_aNodePtr), xmlFree);

        std::string_view aData(reinterpret_cast<char const*>(pContent.get()));

        OUString tmp(OStringToOUString(aData, RTL_TEXTENCODING_UTF8));

        if (offset > tmp.getLength() || offset < 0) {

            DOMException e;

            e.Code = DOMExceptionType_INDEX_SIZE_ERR;

            throw e;

        }

        OUString tmp2 = tmp.subView(0, offset) +

            arg +

            tmp.subView(offset);

        OUString oldValue(reinterpret_cast<char*>(m_aNodePtr->content), strlen(reinterpret_cast<char*>(m_aNodePtr->content)), RTL_TEXTENCODING_UTF8);

        xmlNodeSetContent(m_aNodePtr, reinterpret_cast<const xmlChar*>(OUStringToOString(tmp2, RTL_TEXTENCODING_UTF8).getStr()));

        OUString newValue(reinterpret_cast<char*>(m_aNodePtr->content), strlen(reinterpret_cast<char*>(m_aNodePtr->content)), RTL_TEXTENCODING_UTF8);

        dispatchEvent_Impl(guard, oldValue, newValue);

    }

    /**

    Replace the characters starting at the specified 16-bit unit offset

    with the specified string.

    */

    void SAL_CALL CCharacterData::replaceData(sal_Int32 offset, sal_Int32 count, const OUString& arg)

    {

        ::osl::ClearableMutexGuard guard(m_rMutex);

        if (m_aNodePtr == nullptr)

            return;

        // get current data

        std::shared_ptr<xmlChar const> const pContent(

            xmlNodeGetContent(m_aNodePtr), xmlFree);

        std::string_view aData(reinterpret_cast<char const*>(pContent.get()));

        OUString tmp(OStringToOUString(aData, RTL_TEXTENCODING_UTF8));

        if (offset > tmp.getLength() || offset < 0 || count < 0){

            DOMException e;

            e.Code = DOMExceptionType_INDEX_SIZE_ERR;

            throw e;

        }

        if ((offset+count) > tmp.getLength())

            count = tmp.getLength() - offset;

        OUString tmp2 = tmp.subView(0, offset) +

            arg +

            tmp.subView(offset+count);

        OUString oldValue(reinterpret_cast<char*>(m_aNodePtr->content), strlen(reinterpret_cast<char*>(m_aNodePtr->content)), RTL_TEXTENCODING_UTF8);

        xmlNodeSetContent(m_aNodePtr, reinterpret_cast<const xmlChar*>(OUStringToOString(tmp2, RTL_TEXTENCODING_UTF8).getStr()));

        OUString newValue(reinterpret_cast<char*>(m_aNodePtr->content), strlen(reinterpret_cast<char*>(m_aNodePtr->content)), RTL_TEXTENCODING_UTF8);

        dispatchEvent_Impl(guard, oldValue, newValue);

    }

    /**

    Set the character data of the node that implements this interface.

    */

    void SAL_CALL CCharacterData::setData(const OUString& data)

    {

        ::osl::ClearableMutexGuard guard(m_rMutex);

        if (m_aNodePtr != nullptr)

        {

            OUString oldValue(reinterpret_cast<char*>(m_aNodePtr->content), strlen(reinterpret_cast<char*>(m_aNodePtr->content)), RTL_TEXTENCODING_UTF8);

            xmlNodeSetContent(m_aNodePtr, reinterpret_cast<const xmlChar*>(OUStringToOString(data, RTL_TEXTENCODING_UTF8).getStr()));

            OUString newValue(reinterpret_cast<char*>(m_aNodePtr->content), strlen(reinterpret_cast<char*>(m_aNodePtr->content)), RTL_TEXTENCODING_UTF8);

            dispatchEvent_Impl(guard, oldValue, newValue);

        }

    }

    /**

    Extracts a range of data from the node.

    */

    OUString SAL_CALL CCharacterData::subStringData(sal_Int32 offset, sal_Int32 count)

    {

        ::osl::MutexGuard const g(m_rMutex);

        OUString aStr;

        if (m_aNodePtr != nullptr)

        {

            // get current data

            std::shared_ptr<xmlChar const> const pContent(

                xmlNodeGetContent(m_aNodePtr), xmlFree);

            std::string_view aData(reinterpret_cast<char const*>(pContent.get()));

            OUString tmp(OStringToOUString(aData, RTL_TEXTENCODING_UTF8));

            if (offset > tmp.getLength() || offset < 0 || count < 0) {

                DOMException e;

                e.Code = DOMExceptionType_INDEX_SIZE_ERR;

                throw e;

            }

            aStr = tmp.copy(offset, count);

        }

        return aStr;

    }

} // namespace DOM

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