########################################################################
#
# File Name:            OtherwiseElement.py
#
# Documentation:        http://docs.4suite.com/4XSLT/OtherwiseElement.py.html
#
"""
Implementation of the XSLT Spec otherwise instruction
WWW: http://4suite.com/4XSLT        e-mail: support@4suite.com

Copyright (c) 1999-2000 Fourthought Inc, USA.   All Rights Reserved.
See  http://4suite.com/COPYRIGHT  for license and copyright information
"""

import xml.dom.ext
import xml.dom.Element
import xml.xslt
from xml.xslt import XsltElement, XsltException, Error
from xml.xpath import CoreFunctions

class OtherwiseElement(XsltElement):
    legalAttrs = ()

    def __init__(self, doc, uri=xml.xslt.XSL_NAMESPACE, localName='otherwise', prefix='xsl', baseUri=''):
        XsltElement.__init__(self, doc, uri, localName, prefix, baseUri)

    def setup(self):
        self.__dict__['_nss'] = xml.dom.ext.GetAllNs(self)
        return

    def instantiate(self, context, processor, new_level=1):

        origState = context.copy()
        context.setNamespaces(self._nss)
        
        rec_tpl_params = None
        for child in self.childNodes:
            if child.namespaceURI == xml.xslt.XSL_NAMESPACE and child.localName in ['call-template', 'if', 'choose']:
                context, rec_tpl_params = child.instantiate(context, processor, new_level)
            else:
                context = child.instantiate(context, processor)[0]

        context.set(origState)

        return (context, 1, rec_tpl_params)

    def __getinitargs__(self):
        return (None, self.namespaceURI, self.localName, self.prefix,
                self.baseUri)

    def __getstate__(self):
         base_state = XsltElement.__getstate__(self)
         new_state = (base_state, self._nss, )
         return new_state

    def __setstate__(self, state):
        XsltElement.__setstate__(self, state[0])
        self._nss = state[1]
        return

