def instantiate(self, context, used=None):
if used is None:
used = []
if self in used:
raise XsltError(XsltError.CIRCULAR_ATTRIBUTE_SET, self, self._name)
else:
used.append(self)
# XSLT 1.0, Section 7.1.4, Paragraph 4:
# The available variable bindings are only the top-level ones.
variables = context.variables
context.variables = context.global_variables
attribute_sets = context.transform.attribute_sets
for name in self._use_attribute_sets:
try:
attribute_set = attribute_sets[name]
except KeyError:
raise XsltError(XsltError.UNDEFINED_ATTRIBUTE_SET, self,
attr_set_name)
else:
attribute_set.instantiate(context)
self.process_children(context)
context.variables = variables
used.remove(self)
return
def instantiate(self, context):
context.instruction = self
context.namespaces = self.namespaces
target = self._name.evaluate(context)
if target[:-1] in ('X', 'x'):
if target.lower() == 'xml':
raise XsltError(XsltError.ILLEGAL_XML_PI)
context.push_string_writer()
try:
try:
self.process_children(context)
except RuntimeError:
raise XsltError(XsltError.NONTEXT_IN_PI)
finally:
writer = context.pop_writer()
# XSLT 1.0, Section 7.3, Paragraph 5:
# ERROR: it is an error for the content to contain '?>'
# RECOVERY: insert space between '?' and '>'
data = writer.get_result()
if '?>' in data:
data = content.replace(u'?>', u'? >')
context.processing_instruction(target, data)
return
def prepare(self, element, value):
if value is None:
return self.default
if not value:
raise XsltError(XsltError.INVALID_NCNAME_ATTR, value=value)
if ':' in value:
raise XsltError(XsltError.INVALID_NCNAME_ATTR, value=value)
return value
def prepare(self, element, value):
if value is None:
return self.default
if not value:
raise XsltError(XsltError.INVALID_PREFIX_ATTR, value=value)
if ':' in value:
raise XsltError(XsltError.INVALID_PREFIX_ATTR, value=value)
if value == '#default':
value = None
return value
def instantiate(self, context):
if self._select:
context.instruction = self
context.namespaces = self.namespaces
try:
nodes = self._select.evaluate_as_nodeset(context)
except TypeError:
raise
raise XsltError(XsltError.INVALID_FOREACH_NODESET)
else:
nodes = context.node.xml_children
# Save the context focus (node/pos/size) and state (tpl/curr)
saved = (context.node, context.position, context.size,
context.template, context.current_node)
# Now process the selected nodes
context.template = None
size = context.size = len(nodes)
position = 1
for node in nodes:
context.node = context.current_node = node
context.position = position
self.process_children(context)
position += 1
(context.node, context.position, context.size, context.template,
context.current_node) = saved
return
def prime(self, context):
processed = context.variables
elements, deferred = self._variables, []
num_writers = len(context._writers)
while 1:
for element in elements:
if element._name in processed:
continue
try:
element.instantiate(context)
except XPathError, error:
if error.code != XPathError.UNDEFINED_VARIABLE:
raise
# Remove any aborted and possibly unbalanced
# outut handlers on the stack.
del context._writers[num_writers:]
deferred.append(element)
if not deferred:
break
elif deferred == elements:
# Just pick the first one as being the "bad" variable.
raise XsltError(XsltError.CIRCULAR_VARIABLE,
name=deferred[0]._name)
# Re-order stored variable elements to simplify processing for
# the next transformation.
for element in deferred:
self._variables.remove(element)
self._variables.append(element)
# Try again, but this time processing only the ones that
# referenced, as of yet, undefined variables.
elements, deferred = deferred, []
def prepare(self, element, value):
if value is None:
return self.default and self.default == 'yes'
elif value not in ['yes', 'no']:
raise XsltError(XsltError.INVALID_ATTR_CHOICE,
value=value) #, str(self))
return value == 'yes'
def prepare(self, element, value):
if value is None:
return self.default
try:
return float(value or self.default)
except:
raise XsltError(XsltError.INVALID_NUMBER_ATTR, value=value)
def run(self, source, parameters=None, result=None):
"""
Transform a source document as given via an InputSource.
Assumes that either the Processor instance has already had
stylesheets appended (via appendStylesheet(), for example), or
the source document contains xml-stylesheet processing
instructions that are not being ignored.
The `parameters` argument is an optional dictionary of
stylesheet parameters, the keys of which may be given as
strings if they have no namespace, or as (uri, localname)
tuples otherwise.
The optional writer argument is a SAX-like event handler that
is an Ft.Xml.Xslt.NullWriter subclass. The default writer is
either an Ft.Xml.Xslt.XmlWriter, HtmlWriter or PlainTextWriter,
depending on the stylesheet(s).
The optional `output` argument is a Python file-like object
to be used as the destination for the writer's output.
"""
try:
document = tree.parse(source)
except ReaderError, e:
raise XsltError(XsltError.SOURCE_PARSE_ERROR,
uri=(source.uri or '<Python string>'),
text=e)
def _parseSrc(self, isrc, features, properties):
parser = sax.create_parser()
parser.setContentHandler(self)
for featurename, value in features:
parser.setFeature(featurename, value)
# Always set whitespace rules property
parser.setProperty(sax.PROPERTY_WHITESPACE_RULES,
_XSLT_WHITESPACE_STRIPPING)
for propertyname, value in properties:
parser.setProperty(propertyname, value)
prev_source = self._input_source
try:
self._input_source = isrc
try:
parser.parse(isrc)
except SAXParseException, e:
e = e.getException() or e
if isinstance(e, XsltError):
raise e
raise XsltError(XsltError.STYLESHEET_PARSE_ERROR,
uri=isrc.uri,
text=str(e))
finally:
self._input_source = prev_source
return self._root.stylesheet
def _run(self, node, parameters=None, result=None):
"""
Runs the stylesheet processor against the given XML DOM node with the
stylesheets that have been registered. It does not mutate the source.
If writer is given, it is used in place of the default output method
decisions for choosing the proper writer.
"""
#QUESTION: What about ws stripping?
#ANSWER: Whitespace stripping happens only in the run*() interfaces.
# This method is use-at-your-own-risk. The XSLT conformance of the
# source is maintained by the caller. This exists as a performance
# hook.
parameters = parameters or {}
self.attributeSets = {}
self.keys = {}
#See f:chain-to extension element
self.chainTo = None
self.chainParams = None
if not self.transform:
raise XsltError(XsltError.NO_STYLESHEET)
# Use an internal result to gather the output only if the caller
# didn't supply other means of retrieving it.
if result is None:
result = stringresult()
result.parameters = self.transform.output_parameters
assert result.writer
# Initialize any stylesheet parameters
initial_variables = parameters.copy()
for name in parameters:
if name not in self.transform.parameters:
del initial_variables[name]
# Prepare the stylesheet for processing
context = xsltcontext.xsltcontext(node,
variables=initial_variables,
transform=self.transform,
processor=self,
extfunctions=self._extfunctions,
output_parameters=result.parameters)
context.add_document(node, node.xml_base)
context.push_writer(result.writer)
self.transform.root.prime(context)
# Process the document
try:
self.transform.apply_templates(context, [node])
except XPathError, e:
raise
instruction = context.instruction
strerror = str(e)
e.message = MessageSource.EXPRESSION_POSITION_INFO % (
instruction.baseUri, instruction.lineNumber,
instruction.columnNumber, instruction.nodeName, strerror)
raise
def prepare(self, element, value):
if value is None:
if self.default is None:
return None
value = self.default
elif not isqname(value):
raise XsltError(XsltError.INVALID_QNAME_ATTR, value=value)
return splitqname(value)
def parse(self, expr):
"""Parses the string `expr` into an AST"""
try:
return self._parse(expr)
except _xpatternparser.error, error:
raise XsltError(XsltError.INVALID_PATTERN,
line=error.lineno,
column=error.offset,
text=error.msg)
def instantiate(self, context):
try:
precedence = context.template.import_precedence
except AttributeError:
assert context.template is None
raise XsltError(XsltError.APPLYIMPORTS_WITH_NULL_CURRENT_TEMPLATE,
self)
context.transform.apply_imports(context, precedence)
return
def prepare(self, element, value):
if value is None:
if self.default is None:
return None
value = self.default
elif not value:
raise XsltError(XsltError.QNAME_BUT_NOT_NCNAME, value=value)
try:
index = value.index(':')
except ValueError:
raise XsltError(XsltError.QNAME_BUT_NOT_NCNAME, value=value)
prefix, local = value[:index], value[index + 1:]
try:
namespace = element.namespaces[prefix]
except KeyError:
raise XsltRuntimeException(XsltError.UNDEFINED_PREFIX,
elem=element,
prefix=prefix)
return (namespace, local)
def prime(self, context,
_test_elements=(if_element.if_element,),
_choose_elements=(choose_elements.when_element,
choose_elements.otherwise_element,)):
transform = self.root.stylesheet
try:
template = self._template = transform.named_templates[self._name]
except KeyError:
raise XsltError(XsltError.NAMED_TEMPLATE_NOT_FOUND,
self, self._name)
# NOTE: Tail recursion is now checked for in the xsl:template setup().
return
def _match_nodes(self, context, nodes):
initial_focus = context.node, context.position, context.size
context.size = len(nodes)
position = 1
for node in nodes:
context.node = context.current_node = node
context.position = position
position += 1
# Get the possible matches for `node`
type_key = node.xml_typecode
type_table = self._match_table
if type_key in type_table:
if type_key == tree.element.xml_typecode:
element_table = type_table[type_key]
name_key = node.xml_name
if name_key in element_table:
matches = element_table[name_key]
else:
matches = element_table[None]
else:
matches = type_table[type_key]
else:
matches = type_table[tree.node.xml_typecode]
for pattern, axis_type, namespaces, use_expr in matches:
context.namespaces = namespaces
try:
m = pattern.match(context, node, axis_type)
except XPathError, exc:
raise XsltError(exc.code)
if m:
focus = context.node, context.position, context.size
context.node, context.position, context.size = node, 1, 1
value = use_expr.evaluate(context)
if isinstance(value, datatypes.nodeset):
for value in value:
yield datatypes.string(value), node
else:
yield datatypes.string(value), node
context.node, context.position, context.size = focus
if isinstance(node, tree.element):
for item in self._match_nodes(context, node.xml_children):
yield item
if self._matches_attribute and node.xml_attributes:
attributes = tuple(node.xml_attributes.nodes())
for item in self._match_nodes(context, attributes):
yield item
elif isinstance(node, tree.entity):
for item in self._match_nodes(context, node.xml_children):
yield item
def _lookup(cls, output_parameters):
method = output_parameters.method
try:
cls = cls._methods[method]
except KeyError:
if method[0] is None:
# display only localName if in the null namespace
method = method[1]
raise XsltError(XsltError.UNKNOWN_OUTPUT_METHOD, str(method))
if (cls is xmlwriter.xmlwriter
and output_parameters.cdata_section_elements):
cls = xmlwriter.cdatasectionwriter
return cls
def instantiate(self, context):
context.instruction = self
context.namespaces = self.namespaces
prefix, name = self._name.evaluate(context)
if prefix:
name = prefix + u':' + name
elif name == 'xmlns':
# Section 7.1.3, Paragraph 2
raise XsltError(XsltError.BAD_ATTRIBUTE_NAME, name=name)
# From sec. 7.1.3 of the XSLT spec:
# 1. if 'namespace' is not present, use ns in scope, based on prefix
# from the element QName in 'name'; if no prefix, use null-namespace
# 2. if 'namespace' is present and empty string, use null-namespace
# 3. otherwise, use 'namespace' directly
#
if not self._namespace:
if prefix is not None:
try:
namespace = self.namespaces[prefix]
except KeyError:
raise XsltError(XsltError.UNDEFINED_PREFIX, prefix=prefix)
else:
namespace = None
else:
namespace = self._namespace.evaluate_as_string(context) or None
context.push_string_writer()
try:
try:
self.process_children(context)
except RuntimeError:
raise XsltError(XsltError.NONTEXT_IN_ATTRIBUTE)
finally:
writer = context.pop_writer()
context.attribute(name, writer.get_result(), namespace)
return
def prepare(self, element, value):
if value is None:
if self.default is None:
return None
value = self.default
try:
return parse_xpath(value)
except SyntaxError, error:
raise XsltError(XsltError.INVALID_EXPRESSION,
value=value,
baseuri=element.baseUri,
line=element.lineNumber,
col=element.columnNumber,
msg=str(error))
def instantiate(self, context):
context.instruction = self
context.namespaces = self.namespaces
# XSLT 1.0, Section 7.1.2, Paragraph 2:
# ERROR: not a QName
# RECOVERY: instantiate children excluding attribute nodes
prefix, name = self._name.evaluate(context)
if prefix:
name = prefix + u':' + name
# XSLT 1.0, Section 7.1.2:
# - if `namespace` is not present, `name` is expanded using the
# in-scope namespace declarations
# - if `namespace` is present, the empty string is the null namespace,
# otherwise, the string is the namespace.
if not self._namespace:
try:
namespace = self.namespaces[prefix]
except KeyError:
raise XsltError(XsltError.UNDEFINED_PREFIX, prefix=prefix)
else:
namespace = self._namespace.evaluate_as_string(context) or None
context.start_element(name, namespace)
if self._use_attribute_sets:
attribute_sets = context.transform.attribute_sets
for set_name in self._use_attribute_sets:
try:
attribute_set = attribute_sets[set_name]
except KeyError:
raise XsltError(XsltError.UNDEFINED_ATTRIBUTE_SET,
name=set_name)
attribute_set.instantiate(context)
self.process_children(context)
context.end_element(name, namespace)
return
def prepare(self, element, value):
if value is None:
return _avt_constant(element, self, self.default)
elif '{' not in value and '}' not in value:
return _avt_constant(element, self, value)
try:
return _avt_wrapper(element, self, value)
except XsltError, error:
# an error from the AVT parser
raise XsltError(XsltError.INVALID_AVT,
value=value,
baseuri=element.baseUri,
line=element.lineNumber,
col=element.columnNumber,
msg=str(error))
def prepare(self, element, value):
if value is None:
return self.default
if value not in self.values:
# check for an `attribute_type` instance
for allowed in self.values:
if isinstance(allowed, self.__class__):
try:
allowed.prepare(element, value)
except:
pass
else:
break
else:
# if we get here it is an error
raise XsltError(XsltError.INVALID_ATTR_CHOICE, value=value)
return value
def instantiate(self, context):
output_parameters = outputparameters.outputparameters(
method='xml',
encoding=context.output_parameters.encoding,
omit_xml_declaration=True)
writer = xmlwriter.xmlwriter(output_parameters, StringIO())
context.push_writer(writer)
try:
self.process_children(context)
finally:
writer = context.pop_writer()
msg = writer.stream.getvalue()
if self._terminate:
raise XsltError(XsltError.STYLESHEET_REQUESTED_TERMINATION,
msg=msg)
else:
context.message(msg)
return
def instantiate(self, context):
context.instruction = self
context.namespaces = self.namespaces
node = context.node
if isinstance(node, tree.element):
# Namespace nodes are automatically copied as well
# See XSLT 1.0 Sect 7.5
context.start_element(node.xml_qname, node.xml_namespace,
node.xmlns_attributes.copy())
if self._use_attribute_sets:
attribute_sets = context.transform.attribute_sets
for name in self._use_attribute_sets:
try:
attribute_set = attribute_sets[name]
except KeyError:
raise XsltError(XsltError.UNDEFINED_ATTRIBUTE_SET,
self, name)
attribute_set.instantiate(context)
self.process_children(context)
context.end_element(node.xml_qname, node.xml_namespace)
elif isinstance(node, (tree.text, tree.comment)):
context.text(node.xml_value)
elif isinstance(node, tree.entity):
self.process_children(context)
elif isinstance(node, tree.attribute):
context.attribute(node.xml_qname, node.xml_value,
node.xml_namespace)
elif isinstance(node, tree.processing_instruction):
context.processing_instruction(node.xml_target, node.xml_data)
elif isinstance(node, tree.namespace):
# Relies on XmlWriter rules, which is very close to spec:
# http://www.w3.org/1999/11/REC-xslt-19991116-errata/#E25
context.namespace(node.xml_qname, node.xml_value)
else:
raise RuntimeError("Unupported node type: %r" % type(node))
return
def prepare(self, element, value):
if value is None:
if self.default is None:
return None
value = self.default
elif not isqname(value):
raise XsltError(XsltError.INVALID_QNAME_ATTR, value=value)
prefix, local = splitqname(value)
if prefix:
try:
namespace = element.namespaces[prefix]
except KeyError:
raise XsltRuntimeException(XsltError.UNDEFINED_PREFIX,
elem=element,
prefix=prefix)
else:
namespace = None
return (namespace, local)
def apply_imports(self, context, precedence):
node, mode = context.node, context.mode
# Get the possible template rules for `node`
type_key = node.xml_typecode
if mode in self.match_templates:
type_table = self.match_templates[mode]
if type_key in type_table:
if type_key == tree.element.xml_typecode:
element_table = type_table[type_key]
name = node.xml_name
if name in element_table:
template_rules = element_table[name]
else:
template_rules = element_table[None]
else:
template_rules = type_table[type_key]
else:
template_rules = type_table[tree.node.xml_typecode]
else:
template_rules = ()
first_template = locations = None
for sort_key, pattern, axis_type, template in template_rules:
# Filter out those patterns with a higher import precedence than
# what was specified.
if sort_key[0] < precedence:
context.namespaces = template.namespaces
try:
m = pattern.match(context, node, axis_type)
except XpathError, exc:
raise XsltError(exc.code, node, locations)
if m:
# Make sure the template starts with a clean slate
state = context.template, context.variables
context.template = template
context.variables = context.global_variables
try:
template.instantiate(context)
finally:
context.template, context.variables = state
break
def instantiate(self, context):
context.instruction = self
context.namespaces = self.namespaces
context.start_element(self.nodeName, self._output_namespace,
self._output_nss)
for name, namespace, value in self._output_attrs:
value = value.evaluate(context)
context.attribute(name, value, namespace)
if self._use_attribute_sets:
attribute_sets = context.transform.attribute_sets
for name in self._use_attribute_sets:
try:
attribute_set = attribute_sets[name]
except KeyError:
raise XsltError(XsltError.UNDEFINED_ATTRIBUTE_SET, name=name)
attribute_set.instantiate(context)
self.process_children(context)
context.end_element(self.nodeName, self._output_namespace)
return
def apply_templates(self, context, nodes, mode=None, params=None):
"""
Intended to be used by XSLT instruction implementations only.
Implements the xsl:apply-templates instruction by attempting to
let the stylesheet apply its own template for the given context.
If the stylesheet does not have a matching template, the
built-in templates are invoked.
context is an XsltContext instance. params is a dictionary of
parameters being passed in, defaulting to None.
"""
initial_focus = context.node, context.position, context.size
initial_state = context.template, context.mode
if params is None:
params = {}
context.size, context.mode = len(nodes), mode
# Note, it is quicker to increment the `position` variable than it
# is to use enumeration: itertools.izip(nodes, itertools.count(1))
position = 1
for node in nodes:
# Set the current node for this template application
context.node = context.current_node = node
context.position = position
position += 1
# Get the possible template rules for `node`
type_key = node.xml_typecode
if mode in self.match_templates:
type_table = self.match_templates[mode]
if type_key in type_table:
if type_key == tree.element.xml_typecode:
element_table = type_table[type_key]
name = node.xml_name
if name in element_table:
template_rules = element_table[name]
else:
template_rules = element_table[None]
else:
template_rules = type_table[type_key]
else:
template_rules = type_table[tree.node.xml_typecode]
else:
template_rules = ()
first_template = locations = None
for sort_key, pattern, axis_type, template in template_rules:
context.namespaces = template.namespaces
if pattern.match(context, node, axis_type):
if 1: # recovery_method == Recovery.SILENT
# (default until recovery behaviour is selectable)
# Just use the first matching pattern since they are
# already sorted in descending order.
break
else: # recovery_method in (Recovery.WARNING, Recovery.NONE)
if not first_template:
first_template = template
else:
if not locations:
locations = [
_template_location(first_template)
]
locations.append(_template_location(template))
else:
# All template rules have been processed
if locations:
# Multiple template rules have matched. Report the
# template rule conflicts, sorted by position
locations.sort()
locations = '\n'.join(TEMPLATE_CONFLICT_LOCATION % location
for location in locations)
exception = XsltError(XsltError.MULTIPLE_MATCH_TEMPLATES,
node, locations)
if 1: # recovery_method == Recovery.WARNING
processor.warning(str(exception))
else:
raise exception
if first_template:
template = first_template
context.namespaces = template.namespaces
else:
template = None
if template:
context.template = template
# Make sure the template starts with a clean slate
variables = context.variables
context.variables = context.global_variables
try:
template.instantiate(context, params)
finally:
context.variables = variables
else:
# Nothing matched, use builtin templates
if params and self.builtin_param_warning:
context.processor.warning(BUILTIN_TEMPLATE_WITH_PARAMS)
self.builtin_param_warning = False
if isinstance(node, (tree.element, tree.entity)):
self.apply_templates(context, node.xml_children, mode)
elif isinstance(node, (tree.text, tree.attribute)):
context.text(node.xml_value)
# Restore context
context.node, context.position, context.size = initial_focus
context.template, context.mode = initial_state
return
def setup(self, _param_element=variable_elements.param_element):
"""
Called only once, at the first initialization
"""
self.output_parameters = outputparameters.outputparameters()
# Sort the top-level elements in decreasing import precedence to ease
# processing later.
precedence_key = operator.attrgetter('import_precedence')
elements = sorted(self.children, key=precedence_key, reverse=True)
# Merge the top-level stylesheet elements into their respective
# lists. Any element name not in the mapping is discarded.
# Note, by sharing the same list no merging is required later.
whitespace_elements, variable_elements = [], []
top_level_elements = {
'strip-space': whitespace_elements,
'preserve-space': whitespace_elements,
'output': [],
'key': [],
'decimal-format': [],
'namespace-alias': [],
'attribute-set': [],
'variable': variable_elements,
'param': variable_elements,
'template': [],
}
# Using `groupby` takes advantage of series of same-named elements
# appearing adjacent to each other.
key = operator.attrgetter('expanded_name')
for (namespace, name), nodes in itertools.groupby(self.children, key):
if namespace == XSL_NAMESPACE and name in top_level_elements:
top_level_elements[name].extend(nodes)
# - process the `xsl:preserve-space` and `xsl:strip-space` elements
# RECOVERY: Multiple matching patterns use the last occurance
space_rules = {}
for element in whitespace_elements:
strip = element._strip_whitespace
for token in element._elements:
namespace, name = token
space_rules[token] = (namespace, name, strip)
self.space_rules = space_rules.values()
# sort in decreasing priority, where `*` is lowest, followed by
# `prefix:*`, then all others.
self.space_rules.sort(reverse=True)
# - process the `xsl:output` elements
# Sort in increasing import precedence, so the last one added
# will have the highest import precedence
elements = top_level_elements['output']
getter = operator.attrgetter('_method', '_version', '_encoding',
'_omit_xml_declaration', '_standalone',
'_doctype_system', '_doctype_public',
'_cdata_section_elements', '_indent',
'_media_type', '_byte_order_mark',
'_canonical_form')
for element in elements:
(method, version, encoding, omit_xmldecl, standalone,
doctype_system, doctype_public, cdata_elements, indent,
media_type, byte_order_mark, canonical_form) = getter(element)
if method is not None:
self.output_parameters.method = method
if version is not None:
self.output_parameters.version = version
if encoding is not None:
self.output_parameters.encoding = encoding
if omit_xmldecl is not None:
self.output_parameters.omit_xml_declaration = omit_xmldecl
if standalone is not None:
self.output_parameters.standalone = standalone
if doctype_system is not None:
self.output_parameters.doctype_system = doctype_system
if doctype_public is not None:
self.output_parameters.doctype_public = doctype_public
if cdata_elements:
self.output_parameters.cdata_section_elements += cdata_elements
if indent is not None:
self.output_parameters.indent = indent
if media_type is not None:
self.output_parameters.media_type = media_type
if byte_order_mark is not None:
self.output_parameters.byte_order_mark = byte_order_mark
if canonical_form is not None:
self.output_parameters.canonical_form = canonical_form
# - process the `xsl:key` elements
# Group the keys by name
elements = top_level_elements['key']
name_key = operator.attrgetter('_name')
elements.sort(key=name_key)
keys = self._keys = {}
for name, elements in itertools.groupby(elements, name_key):
keys[name] = tuple(elements)
# - process the `xsl:decimal-format` elements
formats = self.decimal_formats = {}
getter = operator.attrgetter('_decimal_separator',
'_grouping_separator', '_infinity',
'_minus_sign', '_NaN', '_percent',
'_per_mille', '_zero_digit', '_digit',
'_pattern_separator')
for element in top_level_elements['decimal-format']:
name = element._name
format = getter(element)
# It is an error to declare a decimal-format more than once
# (even with different import precedence) with different values.
if name in formats and formats[name] != format:
# Construct a useful name for the error message.
if name:
namespace, name = name
if namespace:
name = element.namespaces[namespace] + ':' + name
else:
name = '#default'
raise XsltError(XsltError.DUPLICATE_DECIMAL_FORMAT, name)
else:
formats[name] = format
# Add the default decimal format, if not declared.
if None not in formats:
formats[None] = ('.', ',', 'Infinity', '-', 'NaN', '%',
unichr(0x2030), '0', '#', ';')
# - process the `xsl:namespace-alias` elements
elements = top_level_elements['namespace-alias']
elements.reverse()
aliases = self.namespace_aliases = {}
for precedence, group in itertools.groupby(elements, precedence_key):
mapped = {}
for element in group:
namespace = element.namespaces[element._stylesheet_prefix]
if namespace not in aliases:
mapped[namespace] = True
result_prefix = element._result_prefix
result_namespace = element.namespaces[result_prefix]
aliases[namespace] = (result_namespace, result_prefix)
# It is an error for a namespace URI to be mapped to multiple
# different namespace URIs (with the same import precedence).
elif namespace in mapped:
raise XsltError(XsltError.DUPLICATE_NAMESPACE_ALIAS,
element._stylesheet_prefix)
if aliases:
# apply namespace fixup for the literal elements
_fixup_aliases(self, aliases)
# - process the `xsl:attribute-set` elements
sets = self.attribute_sets = {}
for element in top_level_elements['attribute-set']:
sets[element._name] = element
# - process the `xsl:param` and `xsl:variable` elements
index, self._variables = {}, variable_elements[:]
variable_elements.reverse()
for element in variable_elements:
name = element._name
if name not in index:
# unique (or first) variable binding
index[name] = 1
else:
# shadowed variable binding, remove from processing list
self._variables.remove(element)
self.parameters = frozenset(element._name
for element in self._variables
if isinstance(element, _param_element))
# - process the `xsl:template` elements
match_templates = collections.defaultdict(_type_dispatch_table)
named_templates = self.named_templates = {}
elements = top_level_elements['template']
elements.reverse()
getter = operator.attrgetter('node_test', 'axis_type', 'node_type')
for position, element in enumerate(elements):
match, name = element._match, element._name
precedence = element.import_precedence
if match:
namespaces = element.namespaces
template_priority = element._priority
mode_table = match_templates[element._mode]
for pattern in match:
node_test, axis_type, node_type = getter(pattern)
if template_priority is None:
priority = node_test.priority
else:
priority = template_priority
sort_key = (precedence, priority, position)
info = (sort_key, node_test, axis_type, element)
# Add the template rule to the dispatch table
type_key = node_type.xml_typecode
if type_key == tree.element.xml_typecode:
# Element types are further keyed by the name test.
name_key = node_test.name_key
if name_key:
prefix, local = name_key
# Unprefixed names are in the null-namespace
try:
namespace = prefix and namespaces[prefix]
except KeyError:
raise XPathError(XPathError.UNDEFINED_PREFIX,
prefix=prefix)
else:
name_key = namespace, local
mode_table[type_key][name_key].append(info)
else:
# Every other node type gets lumped into a single list
# for that node type
mode_table[type_key].append(info)
if name:
# XSLT 1.0, Section 6, Paragraph 3:
# It is an error if a stylesheet contains more than one
# template with the same name and same import precedence.
if name not in named_templates:
named_templates[name] = element
elif named_templates[name].import_precedence == precedence:
# Construct a useful name for the error message.
namespace, name = name
if namespace:
name = element.namespaces[namespace] + ':' + name
raise XsltError(XsltError.DUPLICATE_NAMED_TEMPLATE, name)
# Now expanded the tables and convert to regular dictionaries to
# prevent inadvertant growth when non-existant keys are used.
match_templates = self.match_templates = dict(match_templates)
for mode, type_table in match_templates.iteritems():
# Add those patterns that don't have a distinct type:
# node(), id() and key() patterns
any_patterns = type_table[tree.node.xml_typecode]
type_table = match_templates[mode] = dict(type_table)
for type_key, patterns in type_table.iteritems():
if type_key == tree.element.xml_typecode:
# Add those that are wildcard tests ('*' and 'prefix:*')
wildcard_names = patterns[None]
name_table = type_table[type_key] = dict(patterns)
for name_key, patterns in name_table.iteritems():
if name_key is not None:
patterns.extend(wildcard_names)
patterns.extend(any_patterns)
patterns.sort(reverse=True)
name_table[name_key] = tuple(patterns)
else:
patterns.extend(any_patterns)
patterns.sort(reverse=True)
type_table[type_key] = tuple(patterns)
#self._dump_match_templates(match_templates)
return