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########################################################################
#
# File Name: IfElement.py
#
#
"""
Implementation of the XSLT Spec if 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
"""
from xml.dom import EMPTY_NAMESPACE
import xml.dom.ext
import xml.dom.Element
import xml.xslt
from xml.xslt import XsltElement, XSL_NAMESPACE
from xml.xpath import CoreFunctions, Conversions
from xml.xpath import XPathParser
class IfElement(XsltElement):
legalAttrs = ('test',)
def __init__(self, doc, uri=xml.xslt.XSL_NAMESPACE, localName='if',
prefix='xsl', baseUri=''):
XsltElement.__init__(self, doc, uri, localName, prefix, baseUri)
def setup(self):
parser = XPathParser.XPathParser()
self.__dict__['_test'] = self.getAttributeNS(EMPTY_NAMESPACE, 'test')
self.__dict__['_nss'] = xml.dom.ext.GetAllNs(self)
self.__dict__['_expr'] = parser.parseExpression(self._test)
self.__dict__['_elements'] = []
for child in self.childNodes:
if (child.namespaceURI == XSL_NAMESPACE and
child.localName in ['call-template', 'if', 'choose']):
self.__dict__['_elements'].append((1,child))
else:
self.__dict__['_elements'].append((0,child))
return
def instantiate(self, context, processor, new_level=1):
origState = context.copy()
context.setNamespaces(self._nss)
rec_tpl_params = None
result = self._expr.evaluate(context)
test = Conversions.BooleanValue(result)
if test:
for (recurse,child) in self._elements:
if recurse:
context, rec_tpl_params = child.instantiate(context, processor, new_level)
else:
context = child.instantiate(context, processor)[0]
context.set(origState)
return (context, 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, self._test, self._expr,
self._elements)
return new_state
def __setstate__(self, state):
XsltElement.__setstate__(self, state[0])
self._nss = state[1]
self._test = state[2]
self._expr = state[3]
self._elements = state[4]
return
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