/* -*- 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 <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(
            OUString const& prevValue, OUString const& newValue)
    {
        Reference< XDocumentEvent > docevent(getOwnerDocument(), UNO_QUERY);
        Reference< XMutationEvent > event(docevent->createEvent(
            "DOMCharacterDataModified"), UNO_QUERY);
        event->initMutationEvent(
                "DOMCharacterDataModified",
                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);

            guard.clear(); // release mutex before calling event handlers
            dispatchEvent_Impl(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);
        OString 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.copy(0, offset) + tmp.copy(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);

        guard.clear(); // release mutex before calling event handlers
        dispatchEvent_Impl(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);
        OString 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.copy(0, offset) +
            arg +
            tmp.copy(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);

        guard.clear(); // release mutex before calling event handlers
        dispatchEvent_Impl(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);
        OString 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.copy(0, offset) +
            arg +
            tmp.copy(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);

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

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