Viewing file:  ChooseElement.py (1.94 KB) -rw-r--r--
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########################################################################
#
# File Name: ChooseElement.py
#
# Documentation: http://docs.4suite.org/4XSLT/ChooseElement.py.html
#
"""
Implementation of the XSLT Spec choose instruction
WWW: http://4suite.org/4XSLT e-mail: support@4suite.org
Copyright (c) 1999-2001 Fourthought Inc, USA. All Rights Reserved.
See http://4suite.org/COPYRIGHT for license and copyright information
"""
from Ft.Xml.Xslt import XsltElement, XsltException, Error, XSL_NAMESPACE
from Ft.Xml.Xslt import CategoryTypes
from Ft.Xml.Xslt import ContentInfo, AttributeInfo
from Ft.Xml.XPath import Conversions
class WhenElement(XsltElement):
category = None
content = ContentInfo.Template
legalAttrs = {
'test' : AttributeInfo.BooleanExpression(required=1),
}
class OtherwiseElement(XsltElement):
category = None
content = ContentInfo.Template
legalAttrs = {}
class ChooseElement(XsltElement):
category = CategoryTypes.INSTRUCTION
content = ContentInfo.Seq(
ContentInfo.Rep1(ContentInfo.QName(XSL_NAMESPACE, 'xsl:when')),
ContentInfo.Opt(ContentInfo.QName(XSL_NAMESPACE, 'xsl:otherwise')),
)
legalAttrs = {}
doesSetup = 1
def setup(self):
if not self.children:
raise XsltException(Error.CHOOSE_REQUIRES_WHEN)
return
def instantiate(self, context, processor):
chosen = None
for child in self.children:
context.processorNss = child.namespaces
context.currentInstruction = child
if isinstance(child, WhenElement):
if Conversions.BooleanValue(child._test.evaluate(context)):
chosen = child
break
else:
# xsl:otherwise
chosen = child
if chosen:
for child in chosen.children:
child.instantiate(context, processor)
return
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