DOMCharacterDataImpl.cpp

/*
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 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation, and was
 * originally based on software copyright (c) 2001, International
 * Business Machines, Inc., http://www.ibm.com .  For more information
 * on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
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/*
 * $Id$
 */

#include "DOMCharacterDataImpl.hpp"
#include <xercesc/dom/DOMException.hpp>
#include <xercesc/dom/DOMNode.hpp>
#include "DOMRangeImpl.hpp"
#include "DOMDocumentImpl.hpp"
#include "DOMCasts.hpp"
#include <xercesc/framework/XMLBuffer.hpp>
#include <xercesc/util/XMLUniDefs.hpp>


DOMCharacterDataImpl::DOMCharacterDataImpl(DOMDocument *doc, const XMLCh *dat)
{
    this->fData = ((DOMDocumentImpl *)doc)->getPooledString(dat);
};


DOMCharacterDataImpl::DOMCharacterDataImpl(const DOMCharacterDataImpl &other)
{
    fData = other.fData;
};


DOMCharacterDataImpl::~DOMCharacterDataImpl() {
};


const XMLCh * DOMCharacterDataImpl::getNodeValue() const
{
    return fData;
};


void DOMCharacterDataImpl::setNodeValue(const DOMNode *node, const XMLCh *value)
{
    if (castToNodeImpl(node)->isReadOnly())
        throw DOMException(DOMException::NO_MODIFICATION_ALLOWED_ERR,
                               0);
    fData = ((DOMDocumentImpl *)node->getOwnerDocument())->getPooledString(value);

    if (node->getOwnerDocument() != 0) {
        Ranges* ranges = ((DOMDocumentImpl *)node->getOwnerDocument())->getRanges();
        if (ranges != 0) {
            DOMSize_t sz = ranges->size();
            if (sz != 0) {
                for (DOMSize_t i =0; i<sz; i++) {
                    ranges->elementAt(i)->receiveReplacedText((DOMNode*)node);
                }
            }
        }
    }
};


void DOMCharacterDataImpl::appendData(const DOMNode *node, const XMLCh *dat)
{
    if(castToNodeImpl(node)->isReadOnly())
        throw DOMException(
        DOMException::NO_MODIFICATION_ALLOWED_ERR, 0);


    XMLBuffer temp;
    temp.set(fData);
    temp.append(dat);
    fData = ((DOMDocumentImpl *)node->getOwnerDocument())->getPooledString(temp.getRawBuffer());
};


void DOMCharacterDataImpl::deleteData(const DOMNode *node, DOMSize_t offset, DOMSize_t count)
{
    if (castToNodeImpl(node)->isReadOnly())
        throw DOMException(DOMException::NO_MODIFICATION_ALLOWED_ERR, 0);

    // Note: the C++ XMLCh * operation throws the correct DOMExceptions
    //       when parameter values are bad.
    //

    DOMSize_t len = XMLString::stringLen(this->fData);
    if (offset > len || offset < 0 || count < 0)
        throw DOMException(DOMException::INDEX_SIZE_ERR, 0);



    // Cap the value of delLength to avoid trouble with overflows
    //  in the following length computations.
    if (count > len)
        count = len;

    // If the length of data to be deleted would extend off the end
    //   of the string, cut it back to stop at the end of string.
    if (offset + count >= len)
        count = len - offset;

    DOMSize_t newLen = len - count;

    XMLCh* newString;
    XMLCh temp[4000];
    if (newLen >= 3999)
        newString = new XMLCh[newLen+1];
    else
        newString = temp;

    XMLString::copyNString(newString, fData, offset);
    XMLString::copyString(newString+offset, fData+offset+count);

    fData = ((DOMDocumentImpl *)node->getOwnerDocument())->getPooledString(newString);

    if (newLen >= 3999)
        delete[] newString;

    // We don't delete the old string (doesn't work), or alter
    //   the old string (may be shared)
    //   It just hangs around, possibly orphaned.

    if (node->getOwnerDocument() != 0) {
        Ranges* ranges = ((DOMDocumentImpl *)node->getOwnerDocument())->getRanges();
        if (ranges != 0) {
            DOMSize_t sz = ranges->size();
            if (sz != 0) {
                for (DOMSize_t i =0; i<sz; i++) {
                    ranges->elementAt(i)->updateRangeForDeletedText( (DOMNode*)node, offset, count);
                }
            }
        }
    }
};



const XMLCh *DOMCharacterDataImpl::getData() const
{
    return fData;
};


//
//  getCharDataLength - return the length of the character data string.
//
DOMSize_t DOMCharacterDataImpl::getLength() const
{
    return XMLString::stringLen(fData);
};



void DOMCharacterDataImpl::insertData(const DOMNode *node, DOMSize_t offset, const XMLCh *dat)
{
    if (castToNodeImpl(node)->isReadOnly())
        throw DOMException(
        DOMException::NO_MODIFICATION_ALLOWED_ERR, 0);

    // Note: the C++ XMLCh * operation throws the correct DOMExceptions
    //       when parameter values are bad.
    //

    DOMSize_t len = XMLString::stringLen(this->fData);
    if (offset > len || offset < 0)
        throw DOMException(DOMException::INDEX_SIZE_ERR, 0);

    DOMSize_t datLen = XMLString::stringLen(dat);

    DOMSize_t newLen = len + datLen;

    XMLCh* newString;
    XMLCh temp[4000];
    if (newLen >= 3999)
        newString = new XMLCh[newLen+1];
    else
        newString = temp;

    XMLString::copyNString(newString, fData, offset);
    XMLString::copyNString(newString+offset, dat, datLen);
    XMLString::copyString(newString+offset+datLen, fData+offset);

    fData = ((DOMDocumentImpl *)node->getOwnerDocument())->getPooledString(newString);

    if (newLen >= 3999)
        delete[] newString;
}



void DOMCharacterDataImpl::replaceData(const DOMNode *node, DOMSize_t offset, DOMSize_t count,
                                    const XMLCh *dat)
{
    if (castToNodeImpl(node)->isReadOnly())
        throw DOMException(
        DOMException::NO_MODIFICATION_ALLOWED_ERR, 0);

    deleteData(node, offset, count);
    insertData(node, offset, dat);
};




void DOMCharacterDataImpl::setData(const DOMNode *node, const XMLCh *arg)
{
    if (castToNodeImpl(node)->isReadOnly())
        throw DOMException(DOMException::NO_MODIFICATION_ALLOWED_ERR, 0);
    fData = ((DOMDocumentImpl *)node->getOwnerDocument())->getPooledString(arg);
};





const XMLCh * DOMCharacterDataImpl::substringData(const DOMNode *node, DOMSize_t offset,
                                           DOMSize_t count) const
{

    // Note: the C++ XMLCh * operation throws the correct DOMExceptions
    //       when parameter values are bad.
    //


    DOMSize_t len = XMLString::stringLen(fData);

    if (offset > len || offset < 0 || count < 0)
        throw DOMException(DOMException::INDEX_SIZE_ERR, 0);


    XMLCh* newString;
    XMLCh temp[4000];
    if (len >= 3999)
        newString = new XMLCh[len+1];
    else
        newString = temp;

    XMLString::copyNString(newString, fData+offset, count);
    newString[count] = chNull;

    const XMLCh* retString = ((DOMDocumentImpl *)node->getOwnerDocument())->getPooledString(newString);

    if (len >= 3999)
        delete[] newString;

    return retString;
};