XmlStackedHandlerReader.cpp

 
/* SPDX-License-Identifier: CC0-1.0 */
#include "XmlStackedHandlerReader.h"
 
#include <QDebug>
#include <QStack>
 
#include "XmlStackedHandler.h"
 
namespace Isis {
  XmlStackedHandlerReader::XmlStackedHandlerReader() {
    m_contentHandlers = NULL;
    m_contentHandlers = new QStack<XmlStackedHandler *>;
  }
 
 
  XmlStackedHandlerReader::~XmlStackedHandlerReader() {
    delete m_contentHandlers;
    m_contentHandlers = NULL;
  }
 
 
  void XmlStackedHandlerReader::popContentHandler() {
    m_contentHandlers->pop();
 
    if (m_contentHandlers->size()) {
      m_contentHandlers->top()->setReader(this);
      setContentHandler(m_contentHandlers->top());
    }
    else {
      setContentHandler(NULL);
    }
  }
 
 
  void XmlStackedHandlerReader::pushContentHandler(XmlStackedHandler *newHandler) {
    XmlStackedHandler *old = topContentHandler();
 
    newHandler->setReader(this);
    m_contentHandlers->push(newHandler);
 
    setContentHandler(m_contentHandlers->top());
 
    if (old) {
      // Switch to newHandler and continue parsing
      // This will call newHandler->startElement(...)
      old->switchToNewHandler(topContentHandler());
    }
  }
 
 
  XmlStackedHandler *XmlStackedHandlerReader::topContentHandler() {
    XmlStackedHandler *result = NULL;
 
    if (m_contentHandlers->size())
      result = m_contentHandlers->top();
 
    return result;
  }
}