JezK
Edit File: minidom.py
"""Simple implementation of the Level 1 DOM. Namespaces and other minor Level 2 features are also supported. parse("foo.xml") parseString("<foo><bar/></foo>") Todo: ===== * convenience methods for getting elements and text. * more testing * bring some of the writer and linearizer code into conformance with this interface * SAX 2 namespaces """ import xml.dom from xml.dom import EMPTY_NAMESPACE, EMPTY_PREFIX, XMLNS_NAMESPACE, domreg from xml.dom.minicompat import * from xml.dom.xmlbuilder import DOMImplementationLS, DocumentLS # This is used by the ID-cache invalidation checks; the list isn't # actually complete, since the nodes being checked will never be the # DOCUMENT_NODE or DOCUMENT_FRAGMENT_NODE. (The node being checked is # the node being added or removed, not the node being modified.) # _nodeTypes_with_children = (xml.dom.Node.ELEMENT_NODE, xml.dom.Node.ENTITY_REFERENCE_NODE) class Node(xml.dom.Node): namespaceURI = None # this is non-null only for elements and attributes parentNode = None ownerDocument = None nextSibling = None previousSibling = None prefix = EMPTY_PREFIX # non-null only for NS elements and attributes def __nonzero__(self): return True def toxml(self, encoding = None): return self.toprettyxml("", "", encoding) def toprettyxml(self, indent="\t", newl="\n", encoding = None): # indent = the indentation string to prepend, per level # newl = the newline string to append writer = _get_StringIO() if encoding is not None: import codecs # Can't use codecs.getwriter to preserve 2.0 compatibility writer = codecs.lookup(encoding)[3](writer) if self.nodeType == Node.DOCUMENT_NODE: # Can pass encoding only to document, to put it into XML header self.writexml(writer, "", indent, newl, encoding) else: self.writexml(writer, "", indent, newl) return writer.getvalue() def hasChildNodes(self): if self.childNodes: return True else: return False def _get_childNodes(self): return self.childNodes def _get_firstChild(self): if self.childNodes: return self.childNodes[0] def _get_lastChild(self): if self.childNodes: return self.childNodes[-1] def insertBefore(self, newChild, refChild): if newChild.nodeType == self.DOCUMENT_FRAGMENT_NODE: for c in tuple(newChild.childNodes): self.insertBefore(c, refChild) ### The DOM does not clearly specify what to return in this case return newChild if newChild.nodeType not in self._child_node_types: raise xml.dom.HierarchyRequestErr( "%s cannot be child of %s" % (repr(newChild), repr(self))) if newChild.parentNode is not None: newChild.parentNode.removeChild(newChild) if refChild is None: self.appendChild(newChild) else: try: index = self.childNodes.index(refChild) except ValueError: raise xml.dom.NotFoundErr() if newChild.nodeType in _nodeTypes_with_children: _clear_id_cache(self) self.childNodes.insert(index, newChild) newChild.nextSibling = refChild refChild.previousSibling = newChild if index: node = self.childNodes[index-1] node.nextSibling = newChild newChild.previousSibling = node else: newChild.previousSibling = None newChild.parentNode = self return newChild def appendChild(self, node): if node.nodeType == self.DOCUMENT_FRAGMENT_NODE: for c in tuple(node.childNodes): self.appendChild(c) ### The DOM does not clearly specify what to return in this case return node if node.nodeType not in self._child_node_types: raise xml.dom.HierarchyRequestErr( "%s cannot be child of %s" % (repr(node), repr(self))) elif node.nodeType in _nodeTypes_with_children: _clear_id_cache(self) if node.parentNode is not None: node.parentNode.removeChild(node) _append_child(self, node) node.nextSibling = None return node def replaceChild(self, newChild, oldChild): if newChild.nodeType == self.DOCUMENT_FRAGMENT_NODE: refChild = oldChild.nextSibling self.removeChild(oldChild) return self.insertBefore(newChild, refChild) if newChild.nodeType not in self._child_node_types: raise xml.dom.HierarchyRequestErr( "%s cannot be child of %s" % (repr(newChild), repr(self))) if newChild is oldChild: return if newChild.parentNode is not None: newChild.parentNode.removeChild(newChild) try: index = self.childNodes.index(oldChild) except ValueError: raise xml.dom.NotFoundErr() self.childNodes[index] = newChild newChild.parentNode = self oldChild.parentNode = None if (newChild.nodeType in _nodeTypes_with_children or oldChild.nodeType in _nodeTypes_with_children): _clear_id_cache(self) newChild.nextSibling = oldChild.nextSibling newChild.previousSibling = oldChild.previousSibling oldChild.nextSibling = None oldChild.previousSibling = None if newChild.previousSibling: newChild.previousSibling.nextSibling = newChild if newChild.nextSibling: newChild.nextSibling.previousSibling = newChild return oldChild def removeChild(self, oldChild): try: self.childNodes.remove(oldChild) except ValueError: raise xml.dom.NotFoundErr() if oldChild.nextSibling is not None: oldChild.nextSibling.previousSibling = oldChild.previousSibling if oldChild.previousSibling is not None: oldChild.previousSibling.nextSibling = oldChild.nextSibling oldChild.nextSibling = oldChild.previousSibling = None if oldChild.nodeType in _nodeTypes_with_children: _clear_id_cache(self) oldChild.parentNode = None return oldChild def normalize(self): L = [] for child in self.childNodes: if child.nodeType == Node.TEXT_NODE: if not child.data: # empty text node; discard if L: L[-1].nextSibling = child.nextSibling if child.nextSibling: child.nextSibling.previousSibling = child.previousSibling child.unlink() elif L and L[-1].nodeType == child.nodeType: # collapse text node node = L[-1] node.data = node.data + child.data node.nextSibling = child.nextSibling if child.nextSibling: child.nextSibling.previousSibling = node child.unlink() else: L.append(child) else: L.append(child) if child.nodeType == Node.ELEMENT_NODE: child.normalize() self.childNodes[:] = L def cloneNode(self, deep): return _clone_node(self, deep, self.ownerDocument or self) def isSupported(self, feature, version): return self.ownerDocument.implementation.hasFeature(feature, version) def _get_localName(self): # Overridden in Element and Attr where localName can be Non-Null return None # Node interfaces from Level 3 (WD 9 April 2002) def isSameNode(self, other): return self is other def getInterface(self, feature): if self.isSupported(feature, None): return self else: return None # The "user data" functions use a dictionary that is only present # if some user data has been set, so be careful not to assume it # exists. def getUserData(self, key): try: return self._user_data[key][0] except (AttributeError, KeyError): return None def setUserData(self, key, data, handler): old = None try: d = self._user_data except AttributeError: d = {} self._user_data = d if key in d: old = d[key][0] if data is None: # ignore handlers passed for None handler = None if old is not None: del d[key] else: d[key] = (data, handler) return old def _call_user_data_handler(self, operation, src, dst): if hasattr(self, "_user_data"): for key, (data, handler) in self._user_data.items(): if handler is not None: handler.handle(operation, key, data, src, dst) # minidom-specific API: def unlink(self): self.parentNode = self.ownerDocument = None if self.childNodes: for child in self.childNodes: child.unlink() self.childNodes = NodeList() self.previousSibling = None self.nextSibling = None defproperty(Node, "firstChild", doc="First child node, or None.") defproperty(Node, "lastChild", doc="Last child node, or None.") defproperty(Node, "localName", doc="Namespace-local name of this node.") def _append_child(self, node): # fast path with less checks; usable by DOM builders if careful childNodes = self.childNodes if childNodes: last = childNodes[-1] node.__dict__["previousSibling"] = last last.__dict__["nextSibling"] = node childNodes.append(node) node.__dict__["parentNode"] = self def _in_document(node): # return True iff node is part of a document tree while node is not None: if node.nodeType == Node.DOCUMENT_NODE: return True node = node.parentNode return False def _write_data(writer, data): "Writes datachars to writer." if data: data = data.replace("&", "&").replace("<", "<"). \ replace("\"", """).replace(">", ">") writer.write(data) def _get_elements_by_tagName_helper(parent, name, rc): for node in parent.childNodes: if node.nodeType == Node.ELEMENT_NODE and \ (name == "*" or node.tagName == name): rc.append(node) _get_elements_by_tagName_helper(node, name, rc) return rc def _get_elements_by_tagName_ns_helper(parent, nsURI, localName, rc): for node in parent.childNodes: if node.nodeType == Node.ELEMENT_NODE: if ((localName == "*" or node.localName == localName) and (nsURI == "*" or node.namespaceURI == nsURI)): rc.append(node) _get_elements_by_tagName_ns_helper(node, nsURI, localName, rc) return rc class DocumentFragment(Node): nodeType = Node.DOCUMENT_FRAGMENT_NODE nodeName = "#document-fragment" nodeValue = None attributes = None parentNode = None _child_node_types = (Node.ELEMENT_NODE, Node.TEXT_NODE, Node.CDATA_SECTION_NODE, Node.ENTITY_REFERENCE_NODE, Node.PROCESSING_INSTRUCTION_NODE, Node.COMMENT_NODE, Node.NOTATION_NODE) def __init__(self): self.childNodes = NodeList() class Attr(Node): nodeType = Node.ATTRIBUTE_NODE attributes = None ownerElement = None specified = False _is_id = False _child_node_types = (Node.TEXT_NODE, Node.ENTITY_REFERENCE_NODE) def __init__(self, qName, namespaceURI=EMPTY_NAMESPACE, localName=None, prefix=None): # skip setattr for performance d = self.__dict__ d["nodeName"] = d["name"] = qName d["namespaceURI"] = namespaceURI d["prefix"] = prefix d['childNodes'] = NodeList() # Add the single child node that represents the value of the attr self.childNodes.append(Text()) # nodeValue and value are set elsewhere def _get_localName(self): return self.nodeName.split(":", 1)[-1] def _get_specified(self): return self.specified def __setattr__(self, name, value): d = self.__dict__ if name in ("value", "nodeValue"): d["value"] = d["nodeValue"] = value d2 = self.childNodes[0].__dict__ d2["data"] = d2["nodeValue"] = value if self.ownerElement is not None: _clear_id_cache(self.ownerElement) elif name in ("name", "nodeName"): d["name"] = d["nodeName"] = value if self.ownerElement is not None: _clear_id_cache(self.ownerElement) else: d[name] = value def _set_prefix(self, prefix): nsuri = self.namespaceURI if prefix == "xmlns": if nsuri and nsuri != XMLNS_NAMESPACE: raise xml.dom.NamespaceErr( "illegal use of 'xmlns' prefix for the wrong namespace") d = self.__dict__ d['prefix'] = prefix if prefix is None: newName = self.localName else: newName = "%s:%s" % (prefix, self.localName) if self.ownerElement: _clear_id_cache(self.ownerElement) d['nodeName'] = d['name'] = newName def _set_value(self, value): d = self.__dict__ d['value'] = d['nodeValue'] = value if self.ownerElement: _clear_id_cache(self.ownerElement) self.childNodes[0].data = value def unlink(self): # This implementation does not call the base implementation # since most of that is not needed, and the expense of the # method call is not warranted. We duplicate the removal of # children, but that's all we needed from the base class. elem = self.ownerElement if elem is not None: del elem._attrs[self.nodeName] del elem._attrsNS[(self.namespaceURI, self.localName)] if self._is_id: self._is_id = False elem._magic_id_nodes -= 1 self.ownerDocument._magic_id_count -= 1 for child in self.childNodes: child.unlink() del self.childNodes[:] def _get_isId(self): if self._is_id: return True doc = self.ownerDocument elem = self.ownerElement if doc is None or elem is None: return False info = doc._get_elem_info(elem) if info is None: return False if self.namespaceURI: return info.isIdNS(self.namespaceURI, self.localName) else: return info.isId(self.nodeName) def _get_schemaType(self): doc = self.ownerDocument elem = self.ownerElement if doc is None or elem is None: return _no_type info = doc._get_elem_info(elem) if info is None: return _no_type if self.namespaceURI: return info.getAttributeTypeNS(self.namespaceURI, self.localName) else: return info.getAttributeType(self.nodeName) defproperty(Attr, "isId", doc="True if this attribute is an ID.") defproperty(Attr, "localName", doc="Namespace-local name of this attribute.") defproperty(Attr, "schemaType", doc="Schema type for this attribute.") class NamedNodeMap(object): """The attribute list is a transient interface to the underlying dictionaries. Mutations here will change the underlying element's dictionary. Ordering is imposed artificially and does not reflect the order of attributes as found in an input document. """ __slots__ = ('_attrs', '_attrsNS', '_ownerElement') def __init__(self, attrs, attrsNS, ownerElement): self._attrs = attrs self._attrsNS = attrsNS self._ownerElement = ownerElement def _get_length(self): return len(self._attrs) def item(self, index): try: return self[self._attrs.keys()[index]] except IndexError: return None def items(self): L = [] for node in self._attrs.values(): L.append((node.nodeName, node.value)) return L def itemsNS(self): L = [] for node in self._attrs.values(): L.append(((node.namespaceURI, node.localName), node.value)) return L def has_key(self, key): if isinstance(key, StringTypes): return key in self._attrs else: return key in self._attrsNS def keys(self): return self._attrs.keys() def keysNS(self): return self._attrsNS.keys() def values(self): return self._attrs.values() def get(self, name, value=None): return self._attrs.get(name, value) __len__ = _get_length __hash__ = None # Mutable type can't be correctly hashed def __cmp__(self, other): if self._attrs is getattr(other, "_attrs", None): return 0 else: return cmp(id(self), id(other)) def __getitem__(self, attname_or_tuple): if isinstance(attname_or_tuple, tuple): return self._attrsNS[attname_or_tuple] else: return self._attrs[attname_or_tuple] # same as set def __setitem__(self, attname, value): if isinstance(value, StringTypes): try: node = self._attrs[attname] except KeyError: node = Attr(attname) node.ownerDocument = self._ownerElement.ownerDocument self.setNamedItem(node) node.value = value else: if not isinstance(value, Attr): raise TypeError, "value must be a string or Attr object" node = value self.setNamedItem(node) def getNamedItem(self, name): try: return self._attrs[name] except KeyError: return None def getNamedItemNS(self, namespaceURI, localName): try: return self._attrsNS[(namespaceURI, localName)] except KeyError: return None def removeNamedItem(self, name): n = self.getNamedItem(name) if n is not None: _clear_id_cache(self._ownerElement) del self._attrs[n.nodeName] del self._attrsNS[(n.namespaceURI, n.localName)] if 'ownerElement' in n.__dict__: n.__dict__['ownerElement'] = None return n else: raise xml.dom.NotFoundErr() def removeNamedItemNS(self, namespaceURI, localName): n = self.getNamedItemNS(namespaceURI, localName) if n is not None: _clear_id_cache(self._ownerElement) del self._attrsNS[(n.namespaceURI, n.localName)] del self._attrs[n.nodeName] if 'ownerElement' in n.__dict__: n.__dict__['ownerElement'] = None return n else: raise xml.dom.NotFoundErr() def setNamedItem(self, node): if not isinstance(node, Attr): raise xml.dom.HierarchyRequestErr( "%s cannot be child of %s" % (repr(node), repr(self))) old = self._attrs.get(node.name) if old: old.unlink() self._attrs[node.name] = node self._attrsNS[(node.namespaceURI, node.localName)] = node node.ownerElement = self._ownerElement _clear_id_cache(node.ownerElement) return old def setNamedItemNS(self, node): return self.setNamedItem(node) def __delitem__(self, attname_or_tuple): node = self[attname_or_tuple] _clear_id_cache(node.ownerElement) node.unlink() def __getstate__(self): return self._attrs, self._attrsNS, self._ownerElement def __setstate__(self, state): self._attrs, self._attrsNS, self._ownerElement = state defproperty(NamedNodeMap, "length", doc="Number of nodes in the NamedNodeMap.") AttributeList = NamedNodeMap class TypeInfo(object): __slots__ = 'namespace', 'name' def __init__(self, namespace, name): self.namespace = namespace self.name = name def __repr__(self): if self.namespace: return "<TypeInfo %r (from %r)>" % (self.name, self.namespace) else: return "<TypeInfo %r>" % self.name def _get_name(self): return self.name def _get_namespace(self): return self.namespace _no_type = TypeInfo(None, None) class Element(Node): nodeType = Node.ELEMENT_NODE nodeValue = None schemaType = _no_type _magic_id_nodes = 0 _child_node_types = (Node.ELEMENT_NODE, Node.PROCESSING_INSTRUCTION_NODE, Node.COMMENT_NODE, Node.TEXT_NODE, Node.CDATA_SECTION_NODE, Node.ENTITY_REFERENCE_NODE) def __init__(self, tagName, namespaceURI=EMPTY_NAMESPACE, prefix=None, localName=None): self.tagName = self.nodeName = tagName self.prefix = prefix self.namespaceURI = namespaceURI self.childNodes = NodeList() self._attrs = {} # attributes are double-indexed: self._attrsNS = {} # tagName -> Attribute # URI,localName -> Attribute # in the future: consider lazy generation # of attribute objects this is too tricky # for now because of headaches with # namespaces. def _get_localName(self): return self.tagName.split(":", 1)[-1] def _get_tagName(self): return self.tagName def unlink(self): for attr in self._attrs.values(): attr.unlink() self._attrs = None self._attrsNS = None Node.unlink(self) def getAttribute(self, attname): try: return self._attrs[attname].value except KeyError: return "" def getAttributeNS(self, namespaceURI, localName): try: return self._attrsNS[(namespaceURI, localName)].value except KeyError: return "" def setAttribute(self, attname, value): attr = self.getAttributeNode(attname) if attr is None: attr = Attr(attname) # for performance d = attr.__dict__ d["value"] = d["nodeValue"] = value d["ownerDocument"] = self.ownerDocument self.setAttributeNode(attr) elif value != attr.value: d = attr.__dict__ d["value"] = d["nodeValue"] = value if attr.isId: _clear_id_cache(self) def setAttributeNS(self, namespaceURI, qualifiedName, value): prefix, localname = _nssplit(qualifiedName) attr = self.getAttributeNodeNS(namespaceURI, localname) if attr is None: # for performance attr = Attr(qualifiedName, namespaceURI, localname, prefix) d = attr.__dict__ d["prefix"] = prefix d["nodeName"] = qualifiedName d["value"] = d["nodeValue"] = value d["ownerDocument"] = self.ownerDocument self.setAttributeNode(attr) else: d = attr.__dict__ if value != attr.value: d["value"] = d["nodeValue"] = value if attr.isId: _clear_id_cache(self) if attr.prefix != prefix: d["prefix"] = prefix d["nodeName"] = qualifiedName def getAttributeNode(self, attrname): return self._attrs.get(attrname) def getAttributeNodeNS(self, namespaceURI, localName): return self._attrsNS.get((namespaceURI, localName)) def setAttributeNode(self, attr): if attr.ownerElement not in (None, self): raise xml.dom.InuseAttributeErr("attribute node already owned") old1 = self._attrs.get(attr.name, None) if old1 is not None: self.removeAttributeNode(old1) old2 = self._attrsNS.get((attr.namespaceURI, attr.localName), None) if old2 is not None and old2 is not old1: self.removeAttributeNode(old2) _set_attribute_node(self, attr) if old1 is not attr: # It might have already been part of this node, in which case # it doesn't represent a change, and should not be returned. return old1 if old2 is not attr: return old2 setAttributeNodeNS = setAttributeNode def removeAttribute(self, name): try: attr = self._attrs[name] except KeyError: raise xml.dom.NotFoundErr() self.removeAttributeNode(attr) def removeAttributeNS(self, namespaceURI, localName): try: attr = self._attrsNS[(namespaceURI, localName)] except KeyError: raise xml.dom.NotFoundErr() self.removeAttributeNode(attr) def removeAttributeNode(self, node): if node is None: raise xml.dom.NotFoundErr() try: self._attrs[node.name] except KeyError: raise xml.dom.NotFoundErr() _clear_id_cache(self) node.unlink() # Restore this since the node is still useful and otherwise # unlinked node.ownerDocument = self.ownerDocument removeAttributeNodeNS = removeAttributeNode def hasAttribute(self, name): return name in self._attrs def hasAttributeNS(self, namespaceURI, localName): return (namespaceURI, localName) in self._attrsNS def getElementsByTagName(self, name): return _get_elements_by_tagName_helper(self, name, NodeList()) def getElementsByTagNameNS(self, namespaceURI, localName): return _get_elements_by_tagName_ns_helper( self, namespaceURI, localName, NodeList()) def __repr__(self): return "<DOM Element: %s at %#x>" % (self.tagName, id(self)) def writexml(self, writer, indent="", addindent="", newl=""): # indent = current indentation # addindent = indentation to add to higher levels # newl = newline string writer.write(indent+"<" + self.tagName) attrs = self._get_attributes() a_names = attrs.keys() a_names.sort() for a_name in a_names: writer.write(" %s=\"" % a_name) _write_data(writer, attrs[a_name].value) writer.write("\"") if self.childNodes: writer.write(">") if (len(self.childNodes) == 1 and self.childNodes[0].nodeType == Node.TEXT_NODE): self.childNodes[0].writexml(writer, '', '', '') else: writer.write(newl) for node in self.childNodes: node.writexml(writer, indent+addindent, addindent, newl) writer.write(indent) writer.write("</%s>%s" % (self.tagName, newl)) else: writer.write("/>%s"%(newl)) def _get_attributes(self): return NamedNodeMap(self._attrs, self._attrsNS, self) def hasAttributes(self): if self._attrs: return True else: return False # DOM Level 3 attributes, based on the 22 Oct 2002 draft def setIdAttribute(self, name): idAttr = self.getAttributeNode(name) self.setIdAttributeNode(idAttr) def setIdAttributeNS(self, namespaceURI, localName): idAttr = self.getAttributeNodeNS(namespaceURI, localName) self.setIdAttributeNode(idAttr) def setIdAttributeNode(self, idAttr): if idAttr is None or not self.isSameNode(idAttr.ownerElement): raise xml.dom.NotFoundErr() if _get_containing_entref(self) is not None: raise xml.dom.NoModificationAllowedErr() if not idAttr._is_id: idAttr.__dict__['_is_id'] = True self._magic_id_nodes += 1 self.ownerDocument._magic_id_count += 1 _clear_id_cache(self) defproperty(Element, "attributes", doc="NamedNodeMap of attributes on the element.") defproperty(Element, "localName", doc="Namespace-local name of this element.") def _set_attribute_node(element, attr): _clear_id_cache(element) element._attrs[attr.name] = attr element._attrsNS[(attr.namespaceURI, attr.localName)] = attr # This creates a circular reference, but Element.unlink() # breaks the cycle since the references to the attribute # dictionaries are tossed. attr.__dict__['ownerElement'] = element class Childless: """Mixin that makes childless-ness easy to implement and avoids the complexity of the Node methods that deal with children. """ attributes = None childNodes = EmptyNodeList() firstChild = None lastChild = None def _get_firstChild(self): return None def _get_lastChild(self): return None def appendChild(self, node): raise xml.dom.HierarchyRequestErr( self.nodeName + " nodes cannot have children") def hasChildNodes(self): return False def insertBefore(self, newChild, refChild): raise xml.dom.HierarchyRequestErr( self.nodeName + " nodes do not have children") def removeChild(self, oldChild): raise xml.dom.NotFoundErr( self.nodeName + " nodes do not have children") def normalize(self): # For childless nodes, normalize() has nothing to do. pass def replaceChild(self, newChild, oldChild): raise xml.dom.HierarchyRequestErr( self.nodeName + " nodes do not have children") class ProcessingInstruction(Childless, Node): nodeType = Node.PROCESSING_INSTRUCTION_NODE def __init__(self, target, data): self.target = self.nodeName = target self.data = self.nodeValue = data def _get_data(self): return self.data def _set_data(self, value): d = self.__dict__ d['data'] = d['nodeValue'] = value def _get_target(self): return self.target def _set_target(self, value): d = self.__dict__ d['target'] = d['nodeName'] = value def __setattr__(self, name, value): if name == "data" or name == "nodeValue": self.__dict__['data'] = self.__dict__['nodeValue'] = value elif name == "target" or name == "nodeName": self.__dict__['target'] = self.__dict__['nodeName'] = value else: self.__dict__[name] = value def writexml(self, writer, indent="", addindent="", newl=""): writer.write("%s<?%s %s?>%s" % (indent,self.target, self.data, newl)) class CharacterData(Childless, Node): def _get_length(self): return len(self.data) __len__ = _get_length def _get_data(self): return self.__dict__['data'] def _set_data(self, data): d = self.__dict__ d['data'] = d['nodeValue'] = data _get_nodeValue = _get_data _set_nodeValue = _set_data def __setattr__(self, name, value): if name == "data" or name == "nodeValue": self.__dict__['data'] = self.__dict__['nodeValue'] = value else: self.__dict__[name] = value def __repr__(self): data = self.data if len(data) > 10: dotdotdot = "..." else: dotdotdot = "" return '<DOM %s node "%r%s">' % ( self.__class__.__name__, data[0:10], dotdotdot) def substringData(self, offset, count): if offset < 0: raise xml.dom.IndexSizeErr("offset cannot be negative") if offset >= len(self.data): raise xml.dom.IndexSizeErr("offset cannot be beyond end of data") if count < 0: raise xml.dom.IndexSizeErr("count cannot be negative") return self.data[offset:offset+count] def appendData(self, arg): self.data = self.data + arg def insertData(self, offset, arg): if offset < 0: raise xml.dom.IndexSizeErr("offset cannot be negative") if offset >= len(self.data): raise xml.dom.IndexSizeErr("offset cannot be beyond end of data") if arg: self.data = "%s%s%s" % ( self.data[:offset], arg, self.data[offset:]) def deleteData(self, offset, count): if offset < 0: raise xml.dom.IndexSizeErr("offset cannot be negative") if offset >= len(self.data): raise xml.dom.IndexSizeErr("offset cannot be beyond end of data") if count < 0: raise xml.dom.IndexSizeErr("count cannot be negative") if count: self.data = self.data[:offset] + self.data[offset+count:] def replaceData(self, offset, count, arg): if offset < 0: raise xml.dom.IndexSizeErr("offset cannot be negative") if offset >= len(self.data): raise xml.dom.IndexSizeErr("offset cannot be beyond end of data") if count < 0: raise xml.dom.IndexSizeErr("count cannot be negative") if count: self.data = "%s%s%s" % ( self.data[:offset], arg, self.data[offset+count:]) defproperty(CharacterData, "length", doc="Length of the string data.") class Text(CharacterData): # Make sure we don't add an instance __dict__ if we don't already # have one, at least when that's possible: # XXX this does not work, CharacterData is an old-style class # __slots__ = () nodeType = Node.TEXT_NODE nodeName = "#text" attributes = None def splitText(self, offset): if offset < 0 or offset > len(self.data): raise xml.dom.IndexSizeErr("illegal offset value") newText = self.__class__() newText.data = self.data[offset:] newText.ownerDocument = self.ownerDocument next = self.nextSibling if self.parentNode and self in self.parentNode.childNodes: if next is None: self.parentNode.appendChild(newText) else: self.parentNode.insertBefore(newText, next) self.data = self.data[:offset] return newText def writexml(self, writer, indent="", addindent="", newl=""): _write_data(writer, "%s%s%s" % (indent, self.data, newl)) # DOM Level 3 (WD 9 April 2002) def _get_wholeText(self): L = [self.data] n = self.previousSibling while n is not None: if n.nodeType in (Node.TEXT_NODE, Node.CDATA_SECTION_NODE): L.insert(0, n.data) n = n.previousSibling else: break n = self.nextSibling while n is not None: if n.nodeType in (Node.TEXT_NODE, Node.CDATA_SECTION_NODE): L.append(n.data) n = n.nextSibling else: break return ''.join(L) def replaceWholeText(self, content): # XXX This needs to be seriously changed if minidom ever # supports EntityReference nodes. parent = self.parentNode n = self.previousSibling while n is not None: if n.nodeType in (Node.TEXT_NODE, Node.CDATA_SECTION_NODE): next = n.previousSibling parent.removeChild(n) n = next else: break n = self.nextSibling if not content: parent.removeChild(self) while n is not None: if n.nodeType in (Node.TEXT_NODE, Node.CDATA_SECTION_NODE): next = n.nextSibling parent.removeChild(n) n = next else: break if content: d = self.__dict__ d['data'] = content d['nodeValue'] = content return self else: return None def _get_isWhitespaceInElementContent(self): if self.data.strip(): return False elem = _get_containing_element(self) if elem is None: return False info = self.ownerDocument._get_elem_info(elem) if info is None: return False else: return info.isElementContent() defproperty(Text, "isWhitespaceInElementContent", doc="True iff this text node contains only whitespace" " and is in element content.") defproperty(Text, "wholeText", doc="The text of all logically-adjacent text nodes.") def _get_containing_element(node): c = node.parentNode while c is not None: if c.nodeType == Node.ELEMENT_NODE: return c c = c.parentNode return None def _get_containing_entref(node): c = node.parentNode while c is not None: if c.nodeType == Node.ENTITY_REFERENCE_NODE: return c c = c.parentNode return None class Comment(Childless, CharacterData): nodeType = Node.COMMENT_NODE nodeName = "#comment" def __init__(self, data): self.data = self.nodeValue = data def writexml(self, writer, indent="", addindent="", newl=""): if "--" in self.data: raise ValueError("'--' is not allowed in a comment node") writer.write("%s<!--%s-->%s" % (indent, self.data, newl)) class CDATASection(Text): # Make sure we don't add an instance __dict__ if we don't already # have one, at least when that's possible: # XXX this does not work, Text is an old-style class # __slots__ = () nodeType = Node.CDATA_SECTION_NODE nodeName = "#cdata-section" def writexml(self, writer, indent="", addindent="", newl=""): if self.data.find("]]>") >= 0: raise ValueError("']]>' not allowed in a CDATA section") writer.write("<![CDATA[%s]]>" % self.data) class ReadOnlySequentialNamedNodeMap(object): __slots__ = '_seq', def __init__(self, seq=()): # seq should be a list or tuple self._seq = seq def __len__(self): return len(self._seq) def _get_length(self): return len(self._seq) def getNamedItem(self, name): for n in self._seq: if n.nodeName == name: return n def getNamedItemNS(self, namespaceURI, localName): for n in self._seq: if n.namespaceURI == namespaceURI and n.localName == localName: return n def __getitem__(self, name_or_tuple): if isinstance(name_or_tuple, tuple): node = self.getNamedItemNS(*name_or_tuple) else: node = self.getNamedItem(name_or_tuple) if node is None: raise KeyError, name_or_tuple return node def item(self, index): if index < 0: return None try: return self._seq[index] except IndexError: return None def removeNamedItem(self, name): raise xml.dom.NoModificationAllowedErr( "NamedNodeMap instance is read-only") def removeNamedItemNS(self, namespaceURI, localName): raise xml.dom.NoModificationAllowedErr( "NamedNodeMap instance is read-only") def setNamedItem(self, node): raise xml.dom.NoModificationAllowedErr( "NamedNodeMap instance is read-only") def setNamedItemNS(self, node): raise xml.dom.NoModificationAllowedErr( "NamedNodeMap instance is read-only") def __getstate__(self): return [self._seq] def __setstate__(self, state): self._seq = state[0] defproperty(ReadOnlySequentialNamedNodeMap, "length", doc="Number of entries in the NamedNodeMap.") class Identified: """Mix-in class that supports the publicId and systemId attributes.""" # XXX this does not work, this is an old-style class # __slots__ = 'publicId', 'systemId' def _identified_mixin_init(self, publicId, systemId): self.publicId = publicId self.systemId = systemId def _get_publicId(self): return self.publicId def _get_systemId(self): return self.systemId class DocumentType(Identified, Childless, Node): nodeType = Node.DOCUMENT_TYPE_NODE nodeValue = None name = None publicId = None systemId = None internalSubset = None def __init__(self, qualifiedName): self.entities = ReadOnlySequentialNamedNodeMap() self.notations = ReadOnlySequentialNamedNodeMap() if qualifiedName: prefix, localname = _nssplit(qualifiedName) self.name = localname self.nodeName = self.name def _get_internalSubset(self): return self.internalSubset def cloneNode(self, deep): if self.ownerDocument is None: # it's ok clone = DocumentType(None) clone.name = self.name clone.nodeName = self.name operation = xml.dom.UserDataHandler.NODE_CLONED if deep: clone.entities._seq = [] clone.notations._seq = [] for n in self.notations._seq: notation = Notation(n.nodeName, n.publicId, n.systemId) clone.notations._seq.append(notation) n._call_user_data_handler(operation, n, notation) for e in self.entities._seq: entity = Entity(e.nodeName, e.publicId, e.systemId, e.notationName) entity.actualEncoding = e.actualEncoding entity.encoding = e.encoding entity.version = e.version clone.entities._seq.append(entity) e._call_user_data_handler(operation, e, entity) self._call_user_data_handler(operation, self, clone) return clone else: return None def writexml(self, writer, indent="", addindent="", newl=""): writer.write("<!DOCTYPE ") writer.write(self.name) if self.publicId: writer.write("%s PUBLIC '%s'%s '%s'" % (newl, self.publicId, newl, self.systemId)) elif self.systemId: writer.write("%s SYSTEM '%s'" % (newl, self.systemId)) if self.internalSubset is not None: writer.write(" [") writer.write(self.internalSubset) writer.write("]") writer.write(">"+newl) class Entity(Identified, Node): attributes = None nodeType = Node.ENTITY_NODE nodeValue = None actualEncoding = None encoding = None version = None def __init__(self, name, publicId, systemId, notation): self.nodeName = name self.notationName = notation self.childNodes = NodeList() self._identified_mixin_init(publicId, systemId) def _get_actualEncoding(self): return self.actualEncoding def _get_encoding(self): return self.encoding def _get_version(self): return self.version def appendChild(self, newChild): raise xml.dom.HierarchyRequestErr( "cannot append children to an entity node") def insertBefore(self, newChild, refChild): raise xml.dom.HierarchyRequestErr( "cannot insert children below an entity node") def removeChild(self, oldChild): raise xml.dom.HierarchyRequestErr( "cannot remove children from an entity node") def replaceChild(self, newChild, oldChild): raise xml.dom.HierarchyRequestErr( "cannot replace children of an entity node") class Notation(Identified, Childless, Node): nodeType = Node.NOTATION_NODE nodeValue = None def __init__(self, name, publicId, systemId): self.nodeName = name self._identified_mixin_init(publicId, systemId) class DOMImplementation(DOMImplementationLS): _features = [("core", "1.0"), ("core", "2.0"), ("core", None), ("xml", "1.0"), ("xml", "2.0"), ("xml", None), ("ls-load", "3.0"), ("ls-load", None), ] def hasFeature(self, feature, version): if version == "": version = None return (feature.lower(), version) in self._features def createDocument(self, namespaceURI, qualifiedName, doctype): if doctype and doctype.parentNode is not None: raise xml.dom.WrongDocumentErr( "doctype object owned by another DOM tree") doc = self._create_document() add_root_element = not (namespaceURI is None and qualifiedName is None and doctype is None) if not qualifiedName and add_root_element: # The spec is unclear what to raise here; SyntaxErr # would be the other obvious candidate. Since Xerces raises # InvalidCharacterErr, and since SyntaxErr is not listed # for createDocument, that seems to be the better choice. # XXX: need to check for illegal characters here and in # createElement. # DOM Level III clears this up when talking about the return value # of this function. If namespaceURI, qName and DocType are # Null the document is returned without a document element # Otherwise if doctype or namespaceURI are not None # Then we go back to the above problem raise xml.dom.InvalidCharacterErr("Element with no name") if add_root_element: prefix, localname = _nssplit(qualifiedName) if prefix == "xml" \ and namespaceURI != "http://www.w3.org/XML/1998/namespace": raise xml.dom.NamespaceErr("illegal use of 'xml' prefix") if prefix and not namespaceURI: raise xml.dom.NamespaceErr( "illegal use of prefix without namespaces") element = doc.createElementNS(namespaceURI, qualifiedName) if doctype: doc.appendChild(doctype) doc.appendChild(element) if doctype: doctype.parentNode = doctype.ownerDocument = doc doc.doctype = doctype doc.implementation = self return doc def createDocumentType(self, qualifiedName, publicId, systemId): doctype = DocumentType(qualifiedName) doctype.publicId = publicId doctype.systemId = systemId return doctype # DOM Level 3 (WD 9 April 2002) def getInterface(self, feature): if self.hasFeature(feature, None): return self else: return None # internal def _create_document(self): return Document() class ElementInfo(object): """Object that represents content-model information for an element. This implementation is not expected to be used in practice; DOM builders should provide implementations which do the right thing using information available to it. """ __slots__ = 'tagName', def __init__(self, name): self.tagName = name def getAttributeType(self, aname): return _no_type def getAttributeTypeNS(self, namespaceURI, localName): return _no_type def isElementContent(self): return False def isEmpty(self): """Returns true iff this element is declared to have an EMPTY content model.""" return False def isId(self, aname): """Returns true iff the named attribute is a DTD-style ID.""" return False def isIdNS(self, namespaceURI, localName): """Returns true iff the identified attribute is a DTD-style ID.""" return False def __getstate__(self): return self.tagName def __setstate__(self, state): self.tagName = state def _clear_id_cache(node): if node.nodeType == Node.DOCUMENT_NODE: node._id_cache.clear() node._id_search_stack = None elif _in_document(node): node.ownerDocument._id_cache.clear() node.ownerDocument._id_search_stack= None class Document(Node, DocumentLS): _child_node_types = (Node.ELEMENT_NODE, Node.PROCESSING_INSTRUCTION_NODE, Node.COMMENT_NODE, Node.DOCUMENT_TYPE_NODE) nodeType = Node.DOCUMENT_NODE nodeName = "#document" nodeValue = None attributes = None doctype = None parentNode = None previousSibling = nextSibling = None implementation = DOMImplementation() # Document attributes from Level 3 (WD 9 April 2002) actualEncoding = None encoding = None standalone = None version = None strictErrorChecking = False errorHandler = None documentURI = None _magic_id_count = 0 def __init__(self): self.childNodes = NodeList() # mapping of (namespaceURI, localName) -> ElementInfo # and tagName -> ElementInfo self._elem_info = {} self._id_cache = {} self._id_search_stack = None def _get_elem_info(self, element): if element.namespaceURI: key = element.namespaceURI, element.localName else: key = element.tagName return self._elem_info.get(key) def _get_actualEncoding(self): return self.actualEncoding def _get_doctype(self): return self.doctype def _get_documentURI(self): return self.documentURI def _get_encoding(self): return self.encoding def _get_errorHandler(self): return self.errorHandler def _get_standalone(self): return self.standalone def _get_strictErrorChecking(self): return self.strictErrorChecking def _get_version(self): return self.version def appendChild(self, node): if node.nodeType not in self._child_node_types: raise xml.dom.HierarchyRequestErr( "%s cannot be child of %s" % (repr(node), repr(self))) if node.parentNode is not None: # This needs to be done before the next test since this # may *be* the document element, in which case it should # end up re-ordered to the end. node.parentNode.removeChild(node) if node.nodeType == Node.ELEMENT_NODE \ and self._get_documentElement(): raise xml.dom.HierarchyRequestErr( "two document elements disallowed") return Node.appendChild(self, node) def removeChild(self, oldChild): try: self.childNodes.remove(oldChild) except ValueError: raise xml.dom.NotFoundErr() oldChild.nextSibling = oldChild.previousSibling = None oldChild.parentNode = None if self.documentElement is oldChild: self.documentElement = None return oldChild def _get_documentElement(self): for node in self.childNodes: if node.nodeType == Node.ELEMENT_NODE: return node def unlink(self): if self.doctype is not None: self.doctype.unlink() self.doctype = None Node.unlink(self) def cloneNode(self, deep): if not deep: return None clone = self.implementation.createDocument(None, None, None) clone.encoding = self.encoding clone.standalone = self.standalone clone.version = self.version for n in self.childNodes: childclone = _clone_node(n, deep, clone) assert childclone.ownerDocument.isSameNode(clone) clone.childNodes.append(childclone) if childclone.nodeType == Node.DOCUMENT_NODE: assert clone.documentElement is None elif childclone.nodeType == Node.DOCUMENT_TYPE_NODE: assert clone.doctype is None clone.doctype = childclone childclone.parentNode = clone self._call_user_data_handler(xml.dom.UserDataHandler.NODE_CLONED, self, clone) return clone def createDocumentFragment(self): d = DocumentFragment() d.ownerDocument = self return d def createElement(self, tagName): e = Element(tagName) e.ownerDocument = self return e def createTextNode(self, data): if not isinstance(data, StringTypes): raise TypeError, "node contents must be a string" t = Text() t.data = data t.ownerDocument = self return t def createCDATASection(self, data): if not isinstance(data, StringTypes): raise TypeError, "node contents must be a string" c = CDATASection() c.data = data c.ownerDocument = self return c def createComment(self, data): c = Comment(data) c.ownerDocument = self return c def createProcessingInstruction(self, target, data): p = ProcessingInstruction(target, data) p.ownerDocument = self return p def createAttribute(self, qName): a = Attr(qName) a.ownerDocument = self a.value = "" return a def createElementNS(self, namespaceURI, qualifiedName): prefix, localName = _nssplit(qualifiedName) e = Element(qualifiedName, namespaceURI, prefix) e.ownerDocument = self return e def createAttributeNS(self, namespaceURI, qualifiedName): prefix, localName = _nssplit(qualifiedName) a = Attr(qualifiedName, namespaceURI, localName, prefix) a.ownerDocument = self a.value = "" return a # A couple of implementation-specific helpers to create node types # not supported by the W3C DOM specs: def _create_entity(self, name, publicId, systemId, notationName): e = Entity(name, publicId, systemId, notationName) e.ownerDocument = self return e def _create_notation(self, name, publicId, systemId): n = Notation(name, publicId, systemId) n.ownerDocument = self return n def getElementById(self, id): if id in self._id_cache: return self._id_cache[id] if not (self._elem_info or self._magic_id_count): return None stack = self._id_search_stack if stack is None: # we never searched before, or the cache has been cleared stack = [self.documentElement] self._id_search_stack = stack elif not stack: # Previous search was completed and cache is still valid; # no matching node. return None result = None while stack: node = stack.pop() # add child elements to stack for continued searching stack.extend([child for child in node.childNodes if child.nodeType in _nodeTypes_with_children]) # check this node info = self._get_elem_info(node) if info: # We have to process all ID attributes before # returning in order to get all the attributes set to # be IDs using Element.setIdAttribute*(). for attr in node.attributes.values(): if attr.namespaceURI: if info.isIdNS(attr.namespaceURI, attr.localName): self._id_cache[attr.value] = node if attr.value == id: result = node elif not node._magic_id_nodes: break elif info.isId(attr.name): self._id_cache[attr.value] = node if attr.value == id: result = node elif not node._magic_id_nodes: break elif attr._is_id: self._id_cache[attr.value] = node if attr.value == id: result = node elif node._magic_id_nodes == 1: break elif node._magic_id_nodes: for attr in node.attributes.values(): if attr._is_id: self._id_cache[attr.value] = node if attr.value == id: result = node if result is not None: break return result def getElementsByTagName(self, name): return _get_elements_by_tagName_helper(self, name, NodeList()) def getElementsByTagNameNS(self, namespaceURI, localName): return _get_elements_by_tagName_ns_helper( self, namespaceURI, localName, NodeList()) def isSupported(self, feature, version): return self.implementation.hasFeature(feature, version) def importNode(self, node, deep): if node.nodeType == Node.DOCUMENT_NODE: raise xml.dom.NotSupportedErr("cannot import document nodes") elif node.nodeType == Node.DOCUMENT_TYPE_NODE: raise xml.dom.NotSupportedErr("cannot import document type nodes") return _clone_node(node, deep, self) def writexml(self, writer, indent="", addindent="", newl="", encoding = None): if encoding is None: writer.write('<?xml version="1.0" ?>'+newl) else: writer.write('<?xml version="1.0" encoding="%s"?>%s' % (encoding, newl)) for node in self.childNodes: node.writexml(writer, indent, addindent, newl) # DOM Level 3 (WD 9 April 2002) def renameNode(self, n, namespaceURI, name): if n.ownerDocument is not self: raise xml.dom.WrongDocumentErr( "cannot rename nodes from other documents;\n" "expected %s,\nfound %s" % (self, n.ownerDocument)) if n.nodeType not in (Node.ELEMENT_NODE, Node.ATTRIBUTE_NODE): raise xml.dom.NotSupportedErr( "renameNode() only applies to element and attribute nodes") if namespaceURI != EMPTY_NAMESPACE: if ':' in name: prefix, localName = name.split(':', 1) if ( prefix == "xmlns" and namespaceURI != xml.dom.XMLNS_NAMESPACE): raise xml.dom.NamespaceErr( "illegal use of 'xmlns' prefix") else: if ( name == "xmlns" and namespaceURI != xml.dom.XMLNS_NAMESPACE and n.nodeType == Node.ATTRIBUTE_NODE): raise xml.dom.NamespaceErr( "illegal use of the 'xmlns' attribute") prefix = None localName = name else: prefix = None localName = None if n.nodeType == Node.ATTRIBUTE_NODE: element = n.ownerElement if element is not None: is_id = n._is_id element.removeAttributeNode(n) else: element = None # avoid __setattr__ d = n.__dict__ d['prefix'] = prefix d['localName'] = localName d['namespaceURI'] = namespaceURI d['nodeName'] = name if n.nodeType == Node.ELEMENT_NODE: d['tagName'] = name else: # attribute node d['name'] = name if element is not None: element.setAttributeNode(n) if is_id: element.setIdAttributeNode(n) # It's not clear from a semantic perspective whether we should # call the user data handlers for the NODE_RENAMED event since # we're re-using the existing node. The draft spec has been # interpreted as meaning "no, don't call the handler unless a # new node is created." return n defproperty(Document, "documentElement", doc="Top-level element of this document.") def _clone_node(node, deep, newOwnerDocument): """ Clone a node and give it the new owner document. Called by Node.cloneNode and Document.importNode """ if node.ownerDocument.isSameNode(newOwnerDocument): operation = xml.dom.UserDataHandler.NODE_CLONED else: operation = xml.dom.UserDataHandler.NODE_IMPORTED if node.nodeType == Node.ELEMENT_NODE: clone = newOwnerDocument.createElementNS(node.namespaceURI, node.nodeName) for attr in node.attributes.values(): clone.setAttributeNS(attr.namespaceURI, attr.nodeName, attr.value) a = clone.getAttributeNodeNS(attr.namespaceURI, attr.localName) a.specified = attr.specified if deep: for child in node.childNodes: c = _clone_node(child, deep, newOwnerDocument) clone.appendChild(c) elif node.nodeType == Node.DOCUMENT_FRAGMENT_NODE: clone = newOwnerDocument.createDocumentFragment() if deep: for child in node.childNodes: c = _clone_node(child, deep, newOwnerDocument) clone.appendChild(c) elif node.nodeType == Node.TEXT_NODE: clone = newOwnerDocument.createTextNode(node.data) elif node.nodeType == Node.CDATA_SECTION_NODE: clone = newOwnerDocument.createCDATASection(node.data) elif node.nodeType == Node.PROCESSING_INSTRUCTION_NODE: clone = newOwnerDocument.createProcessingInstruction(node.target, node.data) elif node.nodeType == Node.COMMENT_NODE: clone = newOwnerDocument.createComment(node.data) elif node.nodeType == Node.ATTRIBUTE_NODE: clone = newOwnerDocument.createAttributeNS(node.namespaceURI, node.nodeName) clone.specified = True clone.value = node.value elif node.nodeType == Node.DOCUMENT_TYPE_NODE: assert node.ownerDocument is not newOwnerDocument operation = xml.dom.UserDataHandler.NODE_IMPORTED clone = newOwnerDocument.implementation.createDocumentType( node.name, node.publicId, node.systemId) clone.ownerDocument = newOwnerDocument if deep: clone.entities._seq = [] clone.notations._seq = [] for n in node.notations._seq: notation = Notation(n.nodeName, n.publicId, n.systemId) notation.ownerDocument = newOwnerDocument clone.notations._seq.append(notation) if hasattr(n, '_call_user_data_handler'): n._call_user_data_handler(operation, n, notation) for e in node.entities._seq: entity = Entity(e.nodeName, e.publicId, e.systemId, e.notationName) entity.actualEncoding = e.actualEncoding entity.encoding = e.encoding entity.version = e.version entity.ownerDocument = newOwnerDocument clone.entities._seq.append(entity) if hasattr(e, '_call_user_data_handler'): e._call_user_data_handler(operation, e, entity) else: # Note the cloning of Document and DocumentType nodes is # implementation specific. minidom handles those cases # directly in the cloneNode() methods. raise xml.dom.NotSupportedErr("Cannot clone node %s" % repr(node)) # Check for _call_user_data_handler() since this could conceivably # used with other DOM implementations (one of the FourThought # DOMs, perhaps?). if hasattr(node, '_call_user_data_handler'): node._call_user_data_handler(operation, node, clone) return clone def _nssplit(qualifiedName): fields = qualifiedName.split(':', 1) if len(fields) == 2: return fields else: return (None, fields[0]) def _get_StringIO(): # we can't use cStringIO since it doesn't support Unicode strings from StringIO import StringIO return StringIO() def _do_pulldom_parse(func, args, kwargs): events = func(*args, **kwargs) toktype, rootNode = events.getEvent() events.expandNode(rootNode) events.clear() return rootNode def parse(file, parser=None, bufsize=None): """Parse a file into a DOM by filename or file object.""" if parser is None and not bufsize: from xml.dom import expatbuilder return expatbuilder.parse(file) else: from xml.dom import pulldom return _do_pulldom_parse(pulldom.parse, (file,), {'parser': parser, 'bufsize': bufsize}) def parseString(string, parser=None): """Parse a file into a DOM from a string.""" if parser is None: from xml.dom import expatbuilder return expatbuilder.parseString(string) else: from xml.dom import pulldom return _do_pulldom_parse(pulldom.parseString, (string,), {'parser': parser}) def getDOMImplementation(features=None): if features: if isinstance(features, StringTypes): features = domreg._parse_feature_string(features) for f, v in features: if not Document.implementation.hasFeature(f, v): return None return Document.implementation