A skinned dialog in Python and MFC

#include "StdAfx.h"
#include ".\xmlparser.h"

//////////////////////////////////////////////////////////////////////////
// Static Init
//////////////////////////////////////////////////////////////////////////
CXMLParser* CXMLParser::m_pXMLParser = NULL;

//////////////////////////////////////////////////////////////////////
// XML Parsing Handler
//////////////////////////////////////////////////////////////////////
static void XMLCALL xml_start(void *data, const char *el, const char **attr)
{
	CXMLParser* pXMLParser = CXMLParser::m_pXMLParser;
	if ( pXMLParser ) {
		pXMLParser->XML_StartElement(data,el,attr);
	}
}

static void XMLCALL xml_end(void *data, const char *el)
{
	CXMLParser* pXMLParser = CXMLParser::m_pXMLParser;
	if ( pXMLParser ) {
		pXMLParser->XML_EndElement(data,el);
	}
}

static void XMLCALL xml_char(void *userData,const XML_Char *s,int len)
{
	CXMLParser* pXMLParser = CXMLParser::m_pXMLParser;
	if ( pXMLParser ) {
		pXMLParser->XML_GetCharData(userData,s,len);
	}
}

static void XMLCALL xml_cd_start(void *userData)
{
	CXMLParser* pXMLParser = CXMLParser::m_pXMLParser;
	if ( pXMLParser ) {
		pXMLParser->XML_StartCDData(userData);
	}
}

static void XMLCALL xml_cd_end(void *userData)
{
	CXMLParser* pXMLParser = CXMLParser::m_pXMLParser;
	if ( pXMLParser ) {
		pXMLParser->XML_EndCDData(userData);
	}
}

//////////////////////////////////////////////////////////////////////////
// XMLParser Process
//////////////////////////////////////////////////////////////////////////
VOID CXMLParser::XML_StartElement(void *data, const char *el, const char **attr)
{
	CUnit* pUnit = new CUnit();
	if ( !pUnit ) return;

	if ( !m_RootUnit ) {
		m_RootUnit = pUnit;
	}

	if ( m_CurrentUnit ) {
		m_CurrentUnit->child_unit.push_back( pUnit );
		pUnit->parent_unit = m_CurrentUnit;
	}

	if ( pUnit ) {
		pUnit->element = el;		
		for (int i = 0;attr[i]; i+= 2)
		{
			string temp = attr[i];
			char* str_id = _strdup( temp.c_str() );
			string attr_id = _strlwr( str_id );
			string attr_value = attr[i + 1];
			if ( str_id ) {
				delete [] str_id;
				str_id = NULL;
			}
			pUnit->attributes[attr_id] = attr_value;
		}
		m_CurrentUnit = pUnit;
	}
}

VOID CXMLParser::XML_EndElement(void *data, const char *el)
{
	if ( m_CurrentUnit ) {
		CUnit* pUnit = m_CurrentUnit->parent_unit;
		if ( pUnit ) {
			m_CurrentUnit = pUnit;
		}
	}
}

VOID CXMLParser::XML_StartCDData(void *userData)
{

}

VOID CXMLParser::XML_EndCDData(void *userData)
{

}

VOID CXMLParser::XML_GetCharData(void *userData,const char *s,int len)
{
	if ( m_CurrentUnit ) {
		m_CurrentUnit->chardata.assign( s , len );
	}
}

//////////////////////////////////////////////////////////////////////////
// XMLParser Object Handler
//////////////////////////////////////////////////////////////////////////
CXMLParser::CXMLParser(void)
{
	m_RootUnit = NULL;
	m_CurrentUnit = NULL;
	m_pXMLParser = NULL;
}

CXMLParser::~CXMLParser(void)
{
	if ( m_RootUnit ) {
		delete m_RootUnit;
		m_RootUnit = NULL;
	}
}

BOOL CXMLParser::Initialize(LPCTSTR lpszFileName)
{
	if ( m_parser ) return FALSE;
	if ( !m_File.Open( lpszFileName , CFile::modeRead ) ) return FALSE;
	
	m_parser = XML_ParserCreate(NULL);
	m_pXMLParser = this;

	// setting handler
	XML_SetElementHandler(m_parser, xml_start, xml_end);
	XML_SetCharacterDataHandler(m_parser,xml_char);
	XML_SetCdataSectionHandler(m_parser,xml_cd_start,xml_cd_end);

	return TRUE;
}

VOID CXMLParser::Finalize()
{
	if ( m_File.hFileNull != m_File.m_hFile) {
		m_File.Close();
	}
	if ( m_parser ) {
		XML_ParserFree(m_parser);
		m_parser = NULL;
	}
}

BOOL CXMLParser::DoParsing()
{
	if ( m_File.m_hFile == m_File.hFileNull ) {
		return FALSE;
	}

	BOOL bDone = FALSE;
	UINT nReadByte = 0;
	while ( nReadByte = m_File.Read(m_caBuff,nBufferSize) )
	{
		if ( XML_Parse(m_parser,m_caBuff,nReadByte,bDone) == XML_STATUS_ERROR ) {
			CString strErr;
			strErr.Format( "Parse error at line:%d %s\n", 
				XML_GetCurrentLineNumber(m_parser) , 
				XML_ErrorString(XML_GetErrorCode(m_parser)));
			MessageBox(NULL,strErr,NULL,NULL);
		}
		if ( bDone ) break;
	}
	return TRUE;
}