/**************************************************************
 * 
 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/



#include <characterdata.hxx>

#include <string.h>

#include <boost/shared_ptr.hpp>

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

#include "../events/mutationevent.hxx"


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(
            OUString::createFromAscii("DOMCharacterDataModified")), UNO_QUERY);
        event->initMutationEvent(
                OUString::createFromAscii("DOMCharacterDataModified"),
                sal_True, sal_False, Reference< XNode >(),
                prevValue, newValue, OUString(), (AttrChangeType)0 );
        dispatchEvent(Reference< XEvent >(event, UNO_QUERY));
        dispatchSubtreeModified();
    }

    /**
    Append the string to the end of the character data of the node.
    */
    void SAL_CALL CCharacterData::appendData(const OUString& arg)
        throw (RuntimeException, DOMException)
    {
        ::osl::ClearableMutexGuard guard(m_rMutex);

        if (m_aNodePtr != NULL)
        {
            OUString oldValue((char*)m_aNodePtr->content, strlen((char*)m_aNodePtr->content), RTL_TEXTENCODING_UTF8);
            xmlNodeAddContent(m_aNodePtr, (const xmlChar*)(OUStringToOString(arg, RTL_TEXTENCODING_UTF8).getStr()));
            OUString newValue((char*)m_aNodePtr->content, strlen((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)
        throw (RuntimeException, DOMException)
    {
        ::osl::ClearableMutexGuard guard(m_rMutex);

        if (m_aNodePtr != NULL)
        {
            // get current data
            ::boost::shared_ptr<xmlChar const> const pContent(
                xmlNodeGetContent(m_aNodePtr), xmlFree);
            OString aData(reinterpret_cast<sal_Char const*>(pContent.get()));
            OUString tmp(aData, aData.getLength(), 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);
            tmp2 += tmp.copy(offset+count, tmp.getLength() - (offset+count));
            OUString oldValue((char*)m_aNodePtr->content, strlen((char*)m_aNodePtr->content), RTL_TEXTENCODING_UTF8);
            xmlNodeSetContent(m_aNodePtr, (const xmlChar*)(OUStringToOString(tmp2, RTL_TEXTENCODING_UTF8).getStr()));
            OUString newValue((char*)m_aNodePtr->content, strlen((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() throw (RuntimeException)
    {
        ::osl::MutexGuard const g(m_rMutex);

        OUString aData;
        if (m_aNodePtr != NULL)
        {
            OSL_ENSURE(m_aNodePtr->content, "character data node with NULL content, please inform lars.oppermann@sun.com!");
            if (m_aNodePtr->content != NULL)
            {
                aData = OUString((const sal_Char*)m_aNodePtr->content, strlen((const sal_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() throw (RuntimeException)
    {
        ::osl::MutexGuard const g(m_rMutex);

        sal_Int32 length = 0;
        if (m_aNodePtr != NULL)
        {
             OUString aData((const sal_Char*)m_aNodePtr->content, strlen((const sal_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)
        throw (RuntimeException, DOMException)
    {
        ::osl::ClearableMutexGuard guard(m_rMutex);

        if (m_aNodePtr != NULL)
        {
            // get current data
            ::boost::shared_ptr<xmlChar const> const pContent(
                xmlNodeGetContent(m_aNodePtr), xmlFree);
            OString aData(reinterpret_cast<sal_Char const*>(pContent.get()));
            OUString tmp(aData, aData.getLength(), 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);
            tmp2 += arg;
            tmp2 += tmp.copy(offset, tmp.getLength() - offset);
            OUString oldValue((char*)m_aNodePtr->content, strlen((char*)m_aNodePtr->content), RTL_TEXTENCODING_UTF8);
            xmlNodeSetContent(m_aNodePtr, (const xmlChar*)(OUStringToOString(tmp2, RTL_TEXTENCODING_UTF8).getStr()));
            OUString newValue((char*)m_aNodePtr->content, strlen((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)
        throw (RuntimeException, DOMException)
    {
        ::osl::ClearableMutexGuard guard(m_rMutex);

        if (m_aNodePtr != NULL)
        {
            // get current data
            ::boost::shared_ptr<xmlChar const> const pContent(
                xmlNodeGetContent(m_aNodePtr), xmlFree);
            OString aData(reinterpret_cast<sal_Char const*>(pContent.get()));
            OUString tmp(aData, aData.getLength(), 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);
            tmp2 += arg;
            tmp2 += tmp.copy(offset+count, tmp.getLength() - (offset+count));
            OUString oldValue((char*)m_aNodePtr->content, strlen((char*)m_aNodePtr->content), RTL_TEXTENCODING_UTF8);
            xmlNodeSetContent(m_aNodePtr, (const xmlChar*)(OUStringToOString(tmp2, RTL_TEXTENCODING_UTF8).getStr()));
            OUString newValue((char*)m_aNodePtr->content, strlen((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)
        throw (RuntimeException, DOMException)
    {
        ::osl::ClearableMutexGuard guard(m_rMutex);

        if (m_aNodePtr != NULL)
        {
            OUString oldValue((char*)m_aNodePtr->content, strlen((char*)m_aNodePtr->content), RTL_TEXTENCODING_UTF8);
            xmlNodeSetContent(m_aNodePtr, (const xmlChar*)(OUStringToOString(data, RTL_TEXTENCODING_UTF8).getStr()));
            OUString newValue((char*)m_aNodePtr->content, strlen((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)
        throw (RuntimeException, DOMException)
    {
        ::osl::MutexGuard const g(m_rMutex);

        OUString aStr;
        if (m_aNodePtr != NULL)
        {
            // get current data
            ::boost::shared_ptr<xmlChar const> const pContent(
                xmlNodeGetContent(m_aNodePtr), xmlFree);
            OString aData(reinterpret_cast<sal_Char const*>(pContent.get()));
            OUString tmp(aData, aData.getLength(), 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;
    }


} // namspace DOM