def startElementNS(self, namespaceAndName, qname, attrs):
"""
Gets called when we encounter a new xmlns attribute.
@param namespaceAndName: a (namespace, name) tuple, where name
determines which type of action to take, if the namespace matches
L{TEMPLATE_NAMESPACE}.
@param qname: ignored.
@param attrs: attributes on the element being started.
"""
filename = self.sourceFilename
lineNumber = self.locator.getLineNumber()
columnNumber = self.locator.getColumnNumber()
ns, name = namespaceAndName
if ns == TEMPLATE_NAMESPACE:
if name == 'transparent':
name = ''
elif name == 'slot':
try:
# Try to get the default value for the slot
default = attrs[(None, 'default')]
except KeyError:
# If there wasn't one, then use None to indicate no
# default.
default = None
el = slot(
attrs[(None, 'name')], default=default,
filename=filename, lineNumber=lineNumber,
columnNumber=columnNumber)
self.stack.append(el)
self.current.append(el)
self.current = el.children
return
render = None
attrs = OrderedDict(attrs)
for k, v in items(attrs):
attrNS, justTheName = k
if attrNS != TEMPLATE_NAMESPACE:
continue
if justTheName == 'render':
render = v
del attrs[k]
# nonTemplateAttrs is a dictionary mapping attributes that are *not* in
# TEMPLATE_NAMESPACE to their values. Those in TEMPLATE_NAMESPACE were
# just removed from 'attrs' in the loop immediately above. The key in
# nonTemplateAttrs is either simply the attribute name (if it was not
# specified as having a namespace in the template) or prefix:name,
# preserving the xml namespace prefix given in the document.
nonTemplateAttrs = OrderedDict()
for (attrNs, attrName), v in items(attrs):
nsPrefix = self.prefixMap.get(attrNs)
if nsPrefix is None:
attrKey = attrName
else:
attrKey = '%s:%s' % (nsPrefix, attrName)
nonTemplateAttrs[attrKey] = v
if ns == TEMPLATE_NAMESPACE and name == 'attr':
if not self.stack:
# TODO: define a better exception for this?
raise AssertionError(
'<{%s}attr> as top-level element' % (TEMPLATE_NAMESPACE,))
if 'name' not in nonTemplateAttrs:
# TODO: same here
raise AssertionError(
'<{%s}attr> requires a name attribute' % (TEMPLATE_NAMESPACE,))
el = Tag('', render=render, filename=filename,
lineNumber=lineNumber, columnNumber=columnNumber)
self.stack[-1].attributes[nonTemplateAttrs['name']] = el
self.stack.append(el)
self.current = el.children
return
# Apply any xmlns attributes
if self.xmlnsAttrs:
nonTemplateAttrs.update(OrderedDict(self.xmlnsAttrs))
self.xmlnsAttrs = []
# Add the prefix that was used in the parsed template for non-template
# namespaces (which will not be consumed anyway).
if ns != TEMPLATE_NAMESPACE and ns is not None:
prefix = self.prefixMap[ns]
if prefix is not None:
name = '%s:%s' % (self.prefixMap[ns],name)
el = Tag(
name, attributes=OrderedDict(nonTemplateAttrs), render=render,
filename=filename, lineNumber=lineNumber,
columnNumber=columnNumber)
self.stack.append(el)
self.current.append(el)
self.current = el.children
def startElementNS(
self,
namespaceAndName: Tuple[str, str],
qname: Optional[str],
attrs: Mapping[Tuple[Optional[str], str], str],
) -> None:
"""
Gets called when we encounter a new xmlns attribute.
@param namespaceAndName: a (namespace, name) tuple, where name
determines which type of action to take, if the namespace matches
L{TEMPLATE_NAMESPACE}.
@param qname: ignored.
@param attrs: attributes on the element being started.
"""
filename = self.sourceFilename
lineNumber = self.locator.getLineNumber()
columnNumber = self.locator.getColumnNumber()
ns, name = namespaceAndName
if ns == TEMPLATE_NAMESPACE:
if name == "transparent":
name = ""
elif name == "slot":
default: Optional[str]
try:
# Try to get the default value for the slot
default = attrs[(None, "default")]
except KeyError:
# If there wasn't one, then use None to indicate no
# default.
default = None
sl = slot(
attrs[(None, "name")],
default=default,
filename=filename,
lineNumber=lineNumber,
columnNumber=columnNumber,
)
self.stack.append(sl)
self.current.append(sl)
self.current = sl.children
return
render = None
attrs = OrderedDict(attrs)
for k, v in list(attrs.items()):
attrNS, justTheName = k
if attrNS != TEMPLATE_NAMESPACE:
continue
if justTheName == "render":
render = v
del attrs[k]
# nonTemplateAttrs is a dictionary mapping attributes that are *not* in
# TEMPLATE_NAMESPACE to their values. Those in TEMPLATE_NAMESPACE were
# just removed from 'attrs' in the loop immediately above. The key in
# nonTemplateAttrs is either simply the attribute name (if it was not
# specified as having a namespace in the template) or prefix:name,
# preserving the xml namespace prefix given in the document.
nonTemplateAttrs = OrderedDict()
for (attrNs, attrName), v in attrs.items():
nsPrefix = self.prefixMap.get(attrNs)
if nsPrefix is None:
attrKey = attrName
else:
attrKey = f"{nsPrefix}:{attrName}"
nonTemplateAttrs[attrKey] = v
if ns == TEMPLATE_NAMESPACE and name == "attr":
if not self.stack:
# TODO: define a better exception for this?
raise AssertionError(
f"<{{{TEMPLATE_NAMESPACE}}}attr> as top-level element")
if "name" not in nonTemplateAttrs:
# TODO: same here
raise AssertionError(
f"<{{{TEMPLATE_NAMESPACE}}}attr> requires a name attribute"
)
el = Tag(
"",
render=render,
filename=filename,
lineNumber=lineNumber,
columnNumber=columnNumber,
)
self.stack[-1].attributes[nonTemplateAttrs["name"]] = el
self.stack.append(el)
self.current = el.children
return
# Apply any xmlns attributes
if self.xmlnsAttrs:
nonTemplateAttrs.update(OrderedDict(self.xmlnsAttrs))
self.xmlnsAttrs = []
# Add the prefix that was used in the parsed template for non-template
# namespaces (which will not be consumed anyway).
if ns != TEMPLATE_NAMESPACE and ns is not None:
prefix = self.prefixMap[ns]
if prefix is not None:
name = "{}:{}".format(self.prefixMap[ns], name)
el = Tag(
name,
attributes=OrderedDict(
cast(Mapping[Union[bytes, str], str], nonTemplateAttrs)),
render=render,
filename=filename,
lineNumber=lineNumber,
columnNumber=columnNumber,
)
self.stack.append(el)
self.current.append(el)
self.current = el.children
