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########################################################################
#
# File Name: ParsedLocationPathPattern.py
#
#
"""
Parse class to handle XSLT LocationPathPattern patterns
WWW: http://4suite.com/4XSLT e-mail: support@4suite.com
Copyright (c) 1999-2001 Fourthought Inc, USA. All Rights Reserved.
See http://4suite.com/COPYRIGHT for license and copyright information
"""
from xml.dom import Node
class RootPattern:
"""LocationPathPattern: '/'"""
def __init__(self):
self.priority = 0.5
def getShortcut(self):
return (self, None)
def match(self, context, node, axisType):
# In some DOM implementations, ownerDocument of the root document
# is the document itself
if node.ownerDocument == node:
return 1
# According to the DOM spec, ownerDocument is None for the root
return node.ownerDocument is None
def pprint(self, indent=''):
print indent + '<%s at %x: %s>' % (
self.__class__.__name__,
id(self),
repr(self))
def __repr__(self):
return '/'
class IdKeyPattern:
"""LocationPathPattern: IdKeyPattern"""
def __init__(self, idKey, nodeTest=None, axisType=None):
self._idKey = idKey
self._nodeTest = nodeTest
self._axisType = axisType
self.priority = nodeTest and nodeTest.priority or 0.5
def getShortcut(self):
return (self, None)
def match(self, context, node, axisType):
return (node in self._idKey.evaluate(context))
def pprint(self, indent=''):
print indent + '<%s at %x: %s>' % (
self.__class__.__name__,
id(self),
repr(self))
self._nodeTest and self._nodeTest.pprint(indent + ' ')
self._idKey.pprint(indent + ' ')
def __repr__(self):
return repr(self._idKey)
class IdKeyParentPattern(IdKeyPattern):
"""LocationPathPattern: IdKeyPattern '/' RelativePathPattern"""
def match(self, context, node, axisType):
if self._nodeTest.match(context, node, self._axisType):
return (node.parentNode in self._idKey.evaluate(contenxt))
return 0
def __repr__(self):
st = '/' + (self._axisType == Node.ATTRIBUTE_NODE and '@' or '')
return repr(self._idKey) + st + repr(self._nodeTest)
class IdKeyAncestorPattern(IdKeyPattern):
"""LocationPathPattern: IdKeyPattern '//' RelativePathPattern"""
def match(self, context, node, axisType):
if self._nodeTest.match(context, node, self._axisType):
nodeset = self._idKey.evaluate(context)
while node:
if node.parentNode in nodeset:
return 1
node = node.parentNode
return 0
def __repr__(self):
st = '//' + (self._axisType == Node.ATTRIBUTE_NODE and '@' or '')
return repr(self._idKey) + st + repr(self._nodeTest)
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