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########################################################################
#
# File Name: CallTemplateElement.py
#
#
"""
Implementation of the XSLT Spec call-template stylesheet element.
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
from xml.dom import Node
import xml.dom.ext
import xml.xslt
from xml.xslt import XsltElement, XsltException, Error, XSL_NAMESPACE
from xml.xpath import Util
class CallTemplateElement(XsltElement):
legalAttrs = ('name', )
def __init__(self, doc, uri=xml.xslt.XSL_NAMESPACE,
localName='call-template', prefix='xsl', baseUri=''):
XsltElement.__init__(self, doc, uri, localName, prefix, baseUri)
def setup(self):
self.__dict__['_nss'] = xml.dom.ext.GetAllNs(self)
split_name = Util.ExpandQName(
self.getAttributeNS(EMPTY_NAMESPACE, 'name'),
namespaces=self._nss
)
self.__dict__['_name'] = split_name
self.__dict__['_tailRecursive'] = "unknown"
self.__dict__['_params'] = filter(lambda node:
node.nodeType == Node.ELEMENT_NODE,
self.childNodes)
for child in self.__dict__['_params']:
if child.nodeType == Node.ELEMENT_NODE:
if child.namespaceURI == XSL_NAMESPACE:
if child.localName != 'with-param':
raise XsltException(Error.ILLEGAL_CALLTEMPLATE_CHILD)
else:
raise XsltException(Error.ILLEGAL_CALLTEMPLATE_CHILD)
return
def instantiate(self, context, processor, new_level=1):
if self._tailRecursive == 'unknown':
self.__dict__['_tailRecursive'] = CheckTailRecursion(self, self._name)
origState = context.copy()
context.setNamespaces(self._nss)
params = {}
for child in self._params:
param = child.instantiate(context, processor)[1]
params[param[0]] = param[1]
if self._tailRecursive:
if not new_level:
context.set(origState)
return (context, params)
while params is not None:
params = processor.callTemplate(self._name, context, params, 0)
if params:
context.varBindings.update(params)
else:
processor.callTemplate(self._name, context, params, 1)
context.set(origState)
return (context, None)
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._name,
self._tailRecursive,
self._params)
return new_state
def __setstate__(self, state):
XsltElement.__setstate__(self, state[0])
self._nss = state[1]
self._name = state[2]
self._tailRecursive = state[3]
self._params = state[4]
return
def CheckTailRecursion(node, name):
if node.nextSibling and node.nodeType == Node.ELEMENT_NODE:
return 0
p = node.nodeType == Node.ATTRIBUTE_NODE and node.ownerElement or node.parentNode
if p and p.nodeType == Node.ELEMENT_NODE and p.namespaceURI == XSL_NAMESPACE:
if p.localName in ['if', 'choose']:
return CheckTailRecursion(p, name)
elif p.localName == 'template' and name == p._name:
return 1
return 0
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