asda?‰PNG  IHDR ? f ??C1 sRGB ??é gAMA ±? üa pHYs ? ??o¨d GIDATx^íüL”÷e÷Y?a?("Bh?_ò???¢§?q5k?*:t0A-o??¥]VkJ¢M??f?±8\k2íll£1]q?ù???T PKShe[Ec0c0 xmlbuilder.pynu["""Implementation of the DOM Level 3 'LS-Load' feature.""" import copy import xml.dom from xml.dom.NodeFilter import NodeFilter __all__ = ["DOMBuilder", "DOMEntityResolver", "DOMInputSource"] class Options: """Features object that has variables set for each DOMBuilder feature. The DOMBuilder class uses an instance of this class to pass settings to the ExpatBuilder class. """ # Note that the DOMBuilder class in LoadSave constrains which of these # values can be set using the DOM Level 3 LoadSave feature. namespaces = 1 namespace_declarations = True validation = False external_parameter_entities = True external_general_entities = True external_dtd_subset = True validate_if_schema = False validate = False datatype_normalization = False create_entity_ref_nodes = True entities = True whitespace_in_element_content = True cdata_sections = True comments = True charset_overrides_xml_encoding = True infoset = False supported_mediatypes_only = False errorHandler = None filter = None class DOMBuilder: entityResolver = None errorHandler = None filter = None ACTION_REPLACE = 1 ACTION_APPEND_AS_CHILDREN = 2 ACTION_INSERT_AFTER = 3 ACTION_INSERT_BEFORE = 4 _legal_actions = (ACTION_REPLACE, ACTION_APPEND_AS_CHILDREN, ACTION_INSERT_AFTER, ACTION_INSERT_BEFORE) def __init__(self): self._options = Options() def _get_entityResolver(self): return self.entityResolver def _set_entityResolver(self, entityResolver): self.entityResolver = entityResolver def _get_errorHandler(self): return self.errorHandler def _set_errorHandler(self, errorHandler): self.errorHandler = errorHandler def _get_filter(self): return self.filter def _set_filter(self, filter): self.filter = filter def setFeature(self, name, state): if self.supportsFeature(name): state = state and 1 or 0 try: settings = self._settings[(_name_xform(name), state)] except KeyError: raise xml.dom.NotSupportedErr( "unsupported feature: %r" % (name,)) from None else: for name, value in settings: setattr(self._options, name, value) else: raise xml.dom.NotFoundErr("unknown feature: " + repr(name)) def supportsFeature(self, name): return hasattr(self._options, _name_xform(name)) def canSetFeature(self, name, state): key = (_name_xform(name), state and 1 or 0) return key in self._settings # This dictionary maps from (feature,value) to a list of # (option,value) pairs that should be set on the Options object. # If a (feature,value) setting is not in this dictionary, it is # not supported by the DOMBuilder. # _settings = { ("namespace_declarations", 0): [ ("namespace_declarations", 0)], ("namespace_declarations", 1): [ ("namespace_declarations", 1)], ("validation", 0): [ ("validation", 0)], ("external_general_entities", 0): [ ("external_general_entities", 0)], ("external_general_entities", 1): [ ("external_general_entities", 1)], ("external_parameter_entities", 0): [ ("external_parameter_entities", 0)], ("external_parameter_entities", 1): [ ("external_parameter_entities", 1)], ("validate_if_schema", 0): [ ("validate_if_schema", 0)], ("create_entity_ref_nodes", 0): [ ("create_entity_ref_nodes", 0)], ("create_entity_ref_nodes", 1): [ ("create_entity_ref_nodes", 1)], ("entities", 0): [ ("create_entity_ref_nodes", 0), ("entities", 0)], ("entities", 1): [ ("entities", 1)], ("whitespace_in_element_content", 0): [ ("whitespace_in_element_content", 0)], ("whitespace_in_element_content", 1): [ ("whitespace_in_element_content", 1)], ("cdata_sections", 0): [ ("cdata_sections", 0)], ("cdata_sections", 1): [ ("cdata_sections", 1)], ("comments", 0): [ ("comments", 0)], ("comments", 1): [ ("comments", 1)], ("charset_overrides_xml_encoding", 0): [ ("charset_overrides_xml_encoding", 0)], ("charset_overrides_xml_encoding", 1): [ ("charset_overrides_xml_encoding", 1)], ("infoset", 0): [], ("infoset", 1): [ ("namespace_declarations", 0), ("validate_if_schema", 0), ("create_entity_ref_nodes", 0), ("entities", 0), ("cdata_sections", 0), ("datatype_normalization", 1), ("whitespace_in_element_content", 1), ("comments", 1), ("charset_overrides_xml_encoding", 1)], ("supported_mediatypes_only", 0): [ ("supported_mediatypes_only", 0)], ("namespaces", 0): [ ("namespaces", 0)], ("namespaces", 1): [ ("namespaces", 1)], } def getFeature(self, name): xname = _name_xform(name) try: return getattr(self._options, xname) except AttributeError: if name == "infoset": options = self._options return (options.datatype_normalization and options.whitespace_in_element_content and options.comments and options.charset_overrides_xml_encoding and not (options.namespace_declarations or options.validate_if_schema or options.create_entity_ref_nodes or options.entities or options.cdata_sections)) raise xml.dom.NotFoundErr("feature %s not known" % repr(name)) def parseURI(self, uri): if self.entityResolver: input = self.entityResolver.resolveEntity(None, uri) else: input = DOMEntityResolver().resolveEntity(None, uri) return self.parse(input) def parse(self, input): options = copy.copy(self._options) options.filter = self.filter options.errorHandler = self.errorHandler fp = input.byteStream if fp is None and options.systemId: import urllib.request fp = urllib.request.urlopen(input.systemId) return self._parse_bytestream(fp, options) def parseWithContext(self, input, cnode, action): if action not in self._legal_actions: raise ValueError("not a legal action") raise NotImplementedError("Haven't written this yet...") def _parse_bytestream(self, stream, options): import xml.dom.expatbuilder builder = xml.dom.expatbuilder.makeBuilder(options) return builder.parseFile(stream) def _name_xform(name): return name.lower().replace('-', '_') class DOMEntityResolver(object): __slots__ = '_opener', def resolveEntity(self, publicId, systemId): assert systemId is not None source = DOMInputSource() source.publicId = publicId source.systemId = systemId source.byteStream = self._get_opener().open(systemId) # determine the encoding if the transport provided it source.encoding = self._guess_media_encoding(source) # determine the base URI is we can import posixpath, urllib.parse parts = urllib.parse.urlparse(systemId) scheme, netloc, path, params, query, fragment = parts # XXX should we check the scheme here as well? if path and not path.endswith("/"): path = posixpath.dirname(path) + "/" parts = scheme, netloc, path, params, query, fragment source.baseURI = urllib.parse.urlunparse(parts) return source def _get_opener(self): try: return self._opener except AttributeError: self._opener = self._create_opener() return self._opener def _create_opener(self): import urllib.request return urllib.request.build_opener() def _guess_media_encoding(self, source): info = source.byteStream.info() if "Content-Type" in info: for param in info.getplist(): if param.startswith("charset="): return param.split("=", 1)[1].lower() class DOMInputSource(object): __slots__ = ('byteStream', 'characterStream', 'stringData', 'encoding', 'publicId', 'systemId', 'baseURI') def __init__(self): self.byteStream = None self.characterStream = None self.stringData = None self.encoding = None self.publicId = None self.systemId = None self.baseURI = None def _get_byteStream(self): return self.byteStream def _set_byteStream(self, byteStream): self.byteStream = byteStream def _get_characterStream(self): return self.characterStream def _set_characterStream(self, characterStream): self.characterStream = characterStream def _get_stringData(self): return self.stringData def _set_stringData(self, data): self.stringData = data def _get_encoding(self): return self.encoding def _set_encoding(self, encoding): self.encoding = encoding def _get_publicId(self): return self.publicId def _set_publicId(self, publicId): self.publicId = publicId def _get_systemId(self): return self.systemId def _set_systemId(self, systemId): self.systemId = systemId def _get_baseURI(self): return self.baseURI def _set_baseURI(self, uri): self.baseURI = uri class DOMBuilderFilter: """Element filter which can be used to tailor construction of a DOM instance. """ # There's really no need for this class; concrete implementations # should just implement the endElement() and startElement() # methods as appropriate. Using this makes it easy to only # implement one of them. FILTER_ACCEPT = 1 FILTER_REJECT = 2 FILTER_SKIP = 3 FILTER_INTERRUPT = 4 whatToShow = NodeFilter.SHOW_ALL def _get_whatToShow(self): return self.whatToShow def acceptNode(self, element): return self.FILTER_ACCEPT def startContainer(self, element): return self.FILTER_ACCEPT del NodeFilter class DocumentLS: """Mixin to create documents that conform to the load/save spec.""" async_ = False def _get_async(self): return False def _set_async(self, flag): if flag: raise xml.dom.NotSupportedErr( "asynchronous document loading is not supported") def abort(self): # What does it mean to "clear" a document? Does the # documentElement disappear? raise NotImplementedError( "haven't figured out what this means yet") def load(self, uri): raise NotImplementedError("haven't written this yet") def loadXML(self, source): raise NotImplementedError("haven't written this yet") def saveXML(self, snode): if snode is None: snode = self elif snode.ownerDocument is not self: raise xml.dom.WrongDocumentErr() return snode.toxml() class DOMImplementationLS: MODE_SYNCHRONOUS = 1 MODE_ASYNCHRONOUS = 2 def createDOMBuilder(self, mode, schemaType): if schemaType is not None: raise xml.dom.NotSupportedErr( "schemaType not yet supported") if mode == self.MODE_SYNCHRONOUS: return DOMBuilder() if mode == self.MODE_ASYNCHRONOUS: raise xml.dom.NotSupportedErr( "asynchronous builders are not supported") raise ValueError("unknown value for mode") def createDOMWriter(self): raise NotImplementedError( "the writer interface hasn't been written yet!") def createDOMInputSource(self): return DOMInputSource() PKShe[ 5Iu-u- pulldom.pynu[import xml.sax import xml.sax.handler START_ELEMENT = "START_ELEMENT" END_ELEMENT = "END_ELEMENT" COMMENT = "COMMENT" START_DOCUMENT = "START_DOCUMENT" END_DOCUMENT = "END_DOCUMENT" PROCESSING_INSTRUCTION = "PROCESSING_INSTRUCTION" IGNORABLE_WHITESPACE = "IGNORABLE_WHITESPACE" CHARACTERS = "CHARACTERS" class PullDOM(xml.sax.ContentHandler): _locator = None document = None def __init__(self, documentFactory=None): from xml.dom import XML_NAMESPACE self.documentFactory = documentFactory self.firstEvent = [None, None] self.lastEvent = self.firstEvent self.elementStack = [] self.push = self.elementStack.append try: self.pop = self.elementStack.pop except AttributeError: # use class' pop instead pass self._ns_contexts = [{XML_NAMESPACE:'xml'}] # contains uri -> prefix dicts self._current_context = self._ns_contexts[-1] self.pending_events = [] def pop(self): result = self.elementStack[-1] del self.elementStack[-1] return result def setDocumentLocator(self, locator): self._locator = locator def startPrefixMapping(self, prefix, uri): if not hasattr(self, '_xmlns_attrs'): self._xmlns_attrs = [] self._xmlns_attrs.append((prefix or 'xmlns', uri)) self._ns_contexts.append(self._current_context.copy()) self._current_context[uri] = prefix or None def endPrefixMapping(self, prefix): self._current_context = self._ns_contexts.pop() def startElementNS(self, name, tagName , attrs): # Retrieve xml namespace declaration attributes. xmlns_uri = 'http://www.w3.org/2000/xmlns/' xmlns_attrs = getattr(self, '_xmlns_attrs', None) if xmlns_attrs is not None: for aname, value in xmlns_attrs: attrs._attrs[(xmlns_uri, aname)] = value self._xmlns_attrs = [] uri, localname = name if uri: # When using namespaces, the reader may or may not # provide us with the original name. If not, create # *a* valid tagName from the current context. if tagName is None: prefix = self._current_context[uri] if prefix: tagName = prefix + ":" + localname else: tagName = localname if self.document: node = self.document.createElementNS(uri, tagName) else: node = self.buildDocument(uri, tagName) else: # When the tagname is not prefixed, it just appears as # localname if self.document: node = self.document.createElement(localname) else: node = self.buildDocument(None, localname) for aname,value in attrs.items(): a_uri, a_localname = aname if a_uri == xmlns_uri: if a_localname == 'xmlns': qname = a_localname else: qname = 'xmlns:' + a_localname attr = self.document.createAttributeNS(a_uri, qname) node.setAttributeNodeNS(attr) elif a_uri: prefix = self._current_context[a_uri] if prefix: qname = prefix + ":" + a_localname else: qname = a_localname attr = self.document.createAttributeNS(a_uri, qname) node.setAttributeNodeNS(attr) else: attr = self.document.createAttribute(a_localname) node.setAttributeNode(attr) attr.value = value self.lastEvent[1] = [(START_ELEMENT, node), None] self.lastEvent = self.lastEvent[1] self.push(node) def endElementNS(self, name, tagName): self.lastEvent[1] = [(END_ELEMENT, self.pop()), None] self.lastEvent = self.lastEvent[1] def startElement(self, name, attrs): if self.document: node = self.document.createElement(name) else: node = self.buildDocument(None, name) for aname,value in attrs.items(): attr = self.document.createAttribute(aname) attr.value = value node.setAttributeNode(attr) self.lastEvent[1] = [(START_ELEMENT, node), None] self.lastEvent = self.lastEvent[1] self.push(node) def endElement(self, name): self.lastEvent[1] = [(END_ELEMENT, self.pop()), None] self.lastEvent = self.lastEvent[1] def comment(self, s): if self.document: node = self.document.createComment(s) self.lastEvent[1] = [(COMMENT, node), None] self.lastEvent = self.lastEvent[1] else: event = [(COMMENT, s), None] self.pending_events.append(event) def processingInstruction(self, target, data): if self.document: node = self.document.createProcessingInstruction(target, data) self.lastEvent[1] = [(PROCESSING_INSTRUCTION, node), None] self.lastEvent = self.lastEvent[1] else: event = [(PROCESSING_INSTRUCTION, target, data), None] self.pending_events.append(event) def ignorableWhitespace(self, chars): node = self.document.createTextNode(chars) self.lastEvent[1] = [(IGNORABLE_WHITESPACE, node), None] self.lastEvent = self.lastEvent[1] def characters(self, chars): node = self.document.createTextNode(chars) self.lastEvent[1] = [(CHARACTERS, node), None] self.lastEvent = self.lastEvent[1] def startDocument(self): if self.documentFactory is None: import xml.dom.minidom self.documentFactory = xml.dom.minidom.Document.implementation def buildDocument(self, uri, tagname): # Can't do that in startDocument, since we need the tagname # XXX: obtain DocumentType node = self.documentFactory.createDocument(uri, tagname, None) self.document = node self.lastEvent[1] = [(START_DOCUMENT, node), None] self.lastEvent = self.lastEvent[1] self.push(node) # Put everything we have seen so far into the document for e in self.pending_events: if e[0][0] == PROCESSING_INSTRUCTION: _,target,data = e[0] n = self.document.createProcessingInstruction(target, data) e[0] = (PROCESSING_INSTRUCTION, n) elif e[0][0] == COMMENT: n = self.document.createComment(e[0][1]) e[0] = (COMMENT, n) else: raise AssertionError("Unknown pending event ",e[0][0]) self.lastEvent[1] = e self.lastEvent = e self.pending_events = None return node.firstChild def endDocument(self): self.lastEvent[1] = [(END_DOCUMENT, self.document), None] self.pop() def clear(self): "clear(): Explicitly release parsing structures" self.document = None class ErrorHandler: def warning(self, exception): print(exception) def error(self, exception): raise exception def fatalError(self, exception): raise exception class DOMEventStream: def __init__(self, stream, parser, bufsize): self.stream = stream self.parser = parser self.bufsize = bufsize if not hasattr(self.parser, 'feed'): self.getEvent = self._slurp self.reset() def reset(self): self.pulldom = PullDOM() # This content handler relies on namespace support self.parser.setFeature(xml.sax.handler.feature_namespaces, 1) self.parser.setContentHandler(self.pulldom) def __next__(self): rc = self.getEvent() if rc: return rc raise StopIteration def __iter__(self): return self def expandNode(self, node): event = self.getEvent() parents = [node] while event: token, cur_node = event if cur_node is node: return if token != END_ELEMENT: parents[-1].appendChild(cur_node) if token == START_ELEMENT: parents.append(cur_node) elif token == END_ELEMENT: del parents[-1] event = self.getEvent() def getEvent(self): # use IncrementalParser interface, so we get the desired # pull effect if not self.pulldom.firstEvent[1]: self.pulldom.lastEvent = self.pulldom.firstEvent while not self.pulldom.firstEvent[1]: buf = self.stream.read(self.bufsize) if not buf: self.parser.close() return None self.parser.feed(buf) rc = self.pulldom.firstEvent[1][0] self.pulldom.firstEvent[1] = self.pulldom.firstEvent[1][1] return rc def _slurp(self): """ Fallback replacement for getEvent() using the standard SAX2 interface, which means we slurp the SAX events into memory (no performance gain, but we are compatible to all SAX parsers). """ self.parser.parse(self.stream) self.getEvent = self._emit return self._emit() def _emit(self): """ Fallback replacement for getEvent() that emits the events that _slurp() read previously. """ rc = self.pulldom.firstEvent[1][0] self.pulldom.firstEvent[1] = self.pulldom.firstEvent[1][1] return rc def clear(self): """clear(): Explicitly release parsing objects""" self.pulldom.clear() del self.pulldom self.parser = None self.stream = None class SAX2DOM(PullDOM): def startElementNS(self, name, tagName , attrs): PullDOM.startElementNS(self, name, tagName, attrs) curNode = self.elementStack[-1] parentNode = self.elementStack[-2] parentNode.appendChild(curNode) def startElement(self, name, attrs): PullDOM.startElement(self, name, attrs) curNode = self.elementStack[-1] parentNode = self.elementStack[-2] parentNode.appendChild(curNode) def processingInstruction(self, target, data): PullDOM.processingInstruction(self, target, data) node = self.lastEvent[0][1] parentNode = self.elementStack[-1] parentNode.appendChild(node) def ignorableWhitespace(self, chars): PullDOM.ignorableWhitespace(self, chars) node = self.lastEvent[0][1] parentNode = self.elementStack[-1] parentNode.appendChild(node) def characters(self, chars): PullDOM.characters(self, chars) node = self.lastEvent[0][1] parentNode = self.elementStack[-1] parentNode.appendChild(node) default_bufsize = (2 ** 14) - 20 def parse(stream_or_string, parser=None, bufsize=None): if bufsize is None: bufsize = default_bufsize if isinstance(stream_or_string, str): stream = open(stream_or_string, 'rb') else: stream = stream_or_string if not parser: parser = xml.sax.make_parser() return DOMEventStream(stream, parser, bufsize) def parseString(string, parser=None): from io import StringIO bufsize = len(string) buf = StringIO(string) if not parser: parser = xml.sax.make_parser() return DOMEventStream(buf, parser, bufsize) PKShe[xw{ { domreg.pynu["""Registration facilities for DOM. This module should not be used directly. Instead, the functions getDOMImplementation and registerDOMImplementation should be imported from xml.dom.""" # This is a list of well-known implementations. Well-known names # should be published by posting to xml-sig@python.org, and are # subsequently recorded in this file. import sys well_known_implementations = { 'minidom':'xml.dom.minidom', '4DOM': 'xml.dom.DOMImplementation', } # DOM implementations not officially registered should register # themselves with their registered = {} def registerDOMImplementation(name, factory): """registerDOMImplementation(name, factory) Register the factory function with the name. The factory function should return an object which implements the DOMImplementation interface. The factory function can either return the same object, or a new one (e.g. if that implementation supports some customization).""" registered[name] = factory def _good_enough(dom, features): "_good_enough(dom, features) -> Return 1 if the dom offers the features" for f,v in features: if not dom.hasFeature(f,v): return 0 return 1 def getDOMImplementation(name=None, features=()): """getDOMImplementation(name = None, features = ()) -> DOM implementation. Return a suitable DOM implementation. The name is either well-known, the module name of a DOM implementation, or None. If it is not None, imports the corresponding module and returns DOMImplementation object if the import succeeds. If name is not given, consider the available implementations to find one with the required feature set. If no implementation can be found, raise an ImportError. The features list must be a sequence of (feature, version) pairs which are passed to hasFeature.""" import os creator = None mod = well_known_implementations.get(name) if mod: mod = __import__(mod, {}, {}, ['getDOMImplementation']) return mod.getDOMImplementation() elif name: return registered[name]() elif not sys.flags.ignore_environment and "PYTHON_DOM" in os.environ: return getDOMImplementation(name = os.environ["PYTHON_DOM"]) # User did not specify a name, try implementations in arbitrary # order, returning the one that has the required features if isinstance(features, str): features = _parse_feature_string(features) for creator in registered.values(): dom = creator() if _good_enough(dom, features): return dom for creator in well_known_implementations.keys(): try: dom = getDOMImplementation(name = creator) except Exception: # typically ImportError, or AttributeError continue if _good_enough(dom, features): return dom raise ImportError("no suitable DOM implementation found") def _parse_feature_string(s): features = [] parts = s.split() i = 0 length = len(parts) while i < length: feature = parts[i] if feature[0] in "0123456789": raise ValueError("bad feature name: %r" % (feature,)) i = i + 1 version = None if i < length: v = parts[i] if v[0] in "0123456789": i = i + 1 version = v features.append((feature, version)) return tuple(features) PKShe[' ' minicompat.pynu["""Python version compatibility support for minidom. This module contains internal implementation details and should not be imported; use xml.dom.minidom instead. """ # This module should only be imported using "import *". # # The following names are defined: # # NodeList -- lightest possible NodeList implementation # # EmptyNodeList -- lightest possible NodeList that is guaranteed to # remain empty (immutable) # # StringTypes -- tuple of defined string types # # defproperty -- function used in conjunction with GetattrMagic; # using these together is needed to make them work # as efficiently as possible in both Python 2.2+ # and older versions. For example: # # class MyClass(GetattrMagic): # def _get_myattr(self): # return something # # defproperty(MyClass, "myattr", # "return some value") # # For Python 2.2 and newer, this will construct a # property object on the class, which avoids # needing to override __getattr__(). It will only # work for read-only attributes. # # For older versions of Python, inheriting from # GetattrMagic will use the traditional # __getattr__() hackery to achieve the same effect, # but less efficiently. # # defproperty() should be used for each version of # the relevant _get_() function. __all__ = ["NodeList", "EmptyNodeList", "StringTypes", "defproperty"] import xml.dom StringTypes = (str,) class NodeList(list): __slots__ = () def item(self, index): if 0 <= index < len(self): return self[index] def _get_length(self): return len(self) def _set_length(self, value): raise xml.dom.NoModificationAllowedErr( "attempt to modify read-only attribute 'length'") length = property(_get_length, _set_length, doc="The number of nodes in the NodeList.") # For backward compatibility def __setstate__(self, state): if state is None: state = [] self[:] = state class EmptyNodeList(tuple): __slots__ = () def __add__(self, other): NL = NodeList() NL.extend(other) return NL def __radd__(self, other): NL = NodeList() NL.extend(other) return NL def item(self, index): return None def _get_length(self): return 0 def _set_length(self, value): raise xml.dom.NoModificationAllowedErr( "attempt to modify read-only attribute 'length'") length = property(_get_length, _set_length, doc="The number of nodes in the NodeList.") def defproperty(klass, name, doc): get = getattr(klass, ("_get_" + name)) def set(self, value, name=name): raise xml.dom.NoModificationAllowedErr( "attempt to modify read-only attribute " + repr(name)) assert not hasattr(klass, "_set_" + name), \ "expected not to find _set_" + name prop = property(get, set, doc=doc) setattr(klass, name, prop) PKShe[mmt NodeFilter.pynu[# This is the Python mapping for interface NodeFilter from # DOM2-Traversal-Range. It contains only constants. class NodeFilter: """ This is the DOM2 NodeFilter interface. It contains only constants. """ FILTER_ACCEPT = 1 FILTER_REJECT = 2 FILTER_SKIP = 3 SHOW_ALL = 0xFFFFFFFF SHOW_ELEMENT = 0x00000001 SHOW_ATTRIBUTE = 0x00000002 SHOW_TEXT = 0x00000004 SHOW_CDATA_SECTION = 0x00000008 SHOW_ENTITY_REFERENCE = 0x00000010 SHOW_ENTITY = 0x00000020 SHOW_PROCESSING_INSTRUCTION = 0x00000040 SHOW_COMMENT = 0x00000080 SHOW_DOCUMENT = 0x00000100 SHOW_DOCUMENT_TYPE = 0x00000200 SHOW_DOCUMENT_FRAGMENT = 0x00000400 SHOW_NOTATION = 0x00000800 def acceptNode(self, node): raise NotImplementedError PKShe[oF, ,  minidom.pynu["""Simple implementation of the Level 1 DOM. Namespaces and other minor Level 2 features are also supported. parse("foo.xml") parseString("") 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 io 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 __bool__(self): return True def toxml(self, encoding=None, standalone=None): return self.toprettyxml("", "", encoding, standalone) def toprettyxml(self, indent="\t", newl="\n", encoding=None, standalone=None): if encoding is None: writer = io.StringIO() else: writer = io.TextIOWrapper(io.BytesIO(), encoding=encoding, errors="xmlcharrefreplace", newline='\n') if self.nodeType == Node.DOCUMENT_NODE: # Can pass encoding only to document, to put it into XML header self.writexml(writer, "", indent, newl, encoding, standalone) else: self.writexml(writer, "", indent, newl) if encoding is None: return writer.getvalue() else: return writer.detach().getvalue() def hasChildNodes(self): return bool(self.childNodes) 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 list(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 # A Node is its own context manager, to ensure that an unlink() call occurs. # This is similar to how a file object works. def __enter__(self): return self def __exit__(self, et, ev, tb): self.unlink() 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.previousSibling = last last.nextSibling = node childNodes.append(node) node.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): __slots__=('_name', '_value', 'namespaceURI', '_prefix', 'childNodes', '_localName', 'ownerDocument', 'ownerElement') nodeType = Node.ATTRIBUTE_NODE attributes = 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): self.ownerElement = None self._name = qName self.namespaceURI = namespaceURI self._prefix = prefix if localName is not None: self._localName = localName self.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): try: return self._localName except AttributeError: return self.nodeName.split(":", 1)[-1] def _get_specified(self): return self.specified def _get_name(self): return self._name def _set_name(self, value): self._name = value if self.ownerElement is not None: _clear_id_cache(self.ownerElement) nodeName = name = property(_get_name, _set_name) def _get_value(self): return self._value def _set_value(self, value): self._value = value self.childNodes[0].data = value if self.ownerElement is not None: _clear_id_cache(self.ownerElement) self.childNodes[0].data = value nodeValue = value = property(_get_value, _set_value) def _get_prefix(self): return self._prefix 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") self._prefix = prefix if prefix is None: newName = self.localName else: newName = "%s:%s" % (prefix, self.localName) if self.ownerElement: _clear_id_cache(self.ownerElement) self.name = newName prefix = property(_get_prefix, _set_prefix) 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[list(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 __contains__(self, key): if isinstance(key, str): 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 def _cmp(self, other): if self._attrs is getattr(other, "_attrs", None): return 0 else: return (id(self) > id(other)) - (id(self) < id(other)) def __eq__(self, other): return self._cmp(other) == 0 def __ge__(self, other): return self._cmp(other) >= 0 def __gt__(self, other): return self._cmp(other) > 0 def __le__(self, other): return self._cmp(other) <= 0 def __lt__(self, other): return self._cmp(other) < 0 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, str): 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 hasattr(n, 'ownerElement'): n.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 hasattr(n, 'ownerElement'): n.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 "<%s %r (from %r)>" % (self.__class__.__name__, self.name, self.namespace) else: return "<%s %r>" % (self.__class__.__name__, self.name) def _get_name(self): return self.name def _get_namespace(self): return self.namespace _no_type = TypeInfo(None, None) class Element(Node): __slots__=('ownerDocument', 'parentNode', 'tagName', 'nodeName', 'prefix', 'namespaceURI', '_localName', 'childNodes', '_attrs', '_attrsNS', 'nextSibling', 'previousSibling') 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.parentNode = None self.tagName = self.nodeName = tagName self.prefix = prefix self.namespaceURI = namespaceURI self.childNodes = NodeList() self.nextSibling = self.previousSibling = None # Attribute dictionaries are lazily created # attributes are double-indexed: # 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. self._attrs = None self._attrsNS = None def _ensure_attributes(self): if self._attrs is None: self._attrs = {} self._attrsNS = {} def _get_localName(self): try: return self._localName except AttributeError: return self.tagName.split(":", 1)[-1] def _get_tagName(self): return self.tagName def unlink(self): if self._attrs is not None: for attr in list(self._attrs.values()): attr.unlink() self._attrs = None self._attrsNS = None Node.unlink(self) def getAttribute(self, attname): """Returns the value of the specified attribute. Returns the value of the element's attribute named attname as a string. An empty string is returned if the element does not have such an attribute. Note that an empty string may also be returned as an explicitly given attribute value, use the hasAttribute method to distinguish these two cases. """ if self._attrs is None: return "" try: return self._attrs[attname].value except KeyError: return "" def getAttributeNS(self, namespaceURI, localName): if self._attrsNS is None: return "" 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) attr.value = value # also sets nodeValue attr.ownerDocument = self.ownerDocument self.setAttributeNode(attr) elif value != attr.value: attr.value = 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: attr = Attr(qualifiedName, namespaceURI, localname, prefix) attr.value = value attr.ownerDocument = self.ownerDocument self.setAttributeNode(attr) else: if value != attr.value: attr.value = value if attr.isId: _clear_id_cache(self) if attr.prefix != prefix: attr.prefix = prefix attr.nodeName = qualifiedName def getAttributeNode(self, attrname): if self._attrs is None: return None return self._attrs.get(attrname) def getAttributeNodeNS(self, namespaceURI, localName): if self._attrsNS is None: return None 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") self._ensure_attributes() 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): if self._attrsNS is None: raise xml.dom.NotFoundErr() try: attr = self._attrs[name] except KeyError: raise xml.dom.NotFoundErr() self.removeAttributeNode(attr) def removeAttributeNS(self, namespaceURI, localName): if self._attrsNS is None: raise xml.dom.NotFoundErr() 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 return node removeAttributeNodeNS = removeAttributeNode def hasAttribute(self, name): """Checks whether the element has an attribute with the specified name. Returns True if the element has an attribute with the specified name. Otherwise, returns False. """ if self._attrs is None: return False return name in self._attrs def hasAttributeNS(self, namespaceURI, localName): if self._attrsNS is None: return False return (namespaceURI, localName) in self._attrsNS def getElementsByTagName(self, name): """Returns all descendant elements with the given tag name. Returns the list of all descendant elements (not direct children only) with the specified tag 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 "" % (self.tagName, id(self)) def writexml(self, writer, indent="", addindent="", newl=""): """Write an XML element to a file-like object Write the element to the writer object that must provide a write method (e.g. a file or StringIO object). """ # indent = current indentation # addindent = indentation to add to higher levels # newl = newline string writer.write(indent+"<" + self.tagName) attrs = self._get_attributes() for a_name in attrs.keys(): 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 in ( Node.TEXT_NODE, Node.CDATA_SECTION_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" % (self.tagName, newl)) else: writer.write("/>%s"%(newl)) def _get_attributes(self): self._ensure_attributes() 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._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._ensure_attributes() 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.ownerElement = element class Childless: """Mixin that makes childless-ness easy to implement and avoids the complexity of the Node methods that deal with children. """ __slots__ = () 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 __slots__ = ('target', 'data') def __init__(self, target, data): self.target = target self.data = data # nodeValue is an alias for data def _get_nodeValue(self): return self.data def _set_nodeValue(self, value): self.data = value nodeValue = property(_get_nodeValue, _set_nodeValue) # nodeName is an alias for target def _get_nodeName(self): return self.target def _set_nodeName(self, value): self.target = value nodeName = property(_get_nodeName, _set_nodeName) def writexml(self, writer, indent="", addindent="", newl=""): writer.write("%s%s" % (indent,self.target, self.data, newl)) class CharacterData(Childless, Node): __slots__=('_data', 'ownerDocument','parentNode', 'previousSibling', 'nextSibling') def __init__(self): self.ownerDocument = self.parentNode = None self.previousSibling = self.nextSibling = None self._data = '' Node.__init__(self) def _get_length(self): return len(self.data) __len__ = _get_length def _get_data(self): return self._data def _set_data(self, data): self._data = data data = nodeValue = property(_get_data, _set_data) def __repr__(self): data = self.data if len(data) > 10: dotdotdot = "..." else: dotdotdot = "" return '' % ( 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): __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: self.data = 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(CharacterData): nodeType = Node.COMMENT_NODE nodeName = "#comment" def __init__(self, data): CharacterData.__init__(self) self._data = 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" % (indent, self.data, newl)) class CDATASection(Text): __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("" % 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.""" __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(""+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): __slots__ = ('_elem_info', 'doctype', '_id_search_stack', 'childNodes', '_id_cache') _child_node_types = (Node.ELEMENT_NODE, Node.PROCESSING_INSTRUCTION_NODE, Node.COMMENT_NODE, Node.DOCUMENT_TYPE_NODE) implementation = DOMImplementation() nodeType = Node.DOCUMENT_NODE nodeName = "#document" nodeValue = None attributes = None parentNode = None previousSibling = nextSibling = None # 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.doctype = None 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, str): 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, str): 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, standalone=None): declarations = [] if encoding: declarations.append(f'encoding="{encoding}"') if standalone is not None: declarations.append(f'standalone="{"yes" if standalone else "no"}"') writer.write(f'{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 n.prefix = prefix n._localName = localName n.namespaceURI = namespaceURI n.nodeName = name if n.nodeType == Node.ELEMENT_NODE: n.tagName = name else: # attribute node n.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 _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, str): features = domreg._parse_feature_string(features) for f, v in features: if not Document.implementation.hasFeature(f, v): return None return Document.implementation PKShe[dexpatbuilder.pynu["""Facility to use the Expat parser to load a minidom instance from a string or file. This avoids all the overhead of SAX and pulldom to gain performance. """ # Warning! # # This module is tightly bound to the implementation details of the # minidom DOM and can't be used with other DOM implementations. This # is due, in part, to a lack of appropriate methods in the DOM (there is # no way to create Entity and Notation nodes via the DOM Level 2 # interface), and for performance. The latter is the cause of some fairly # cryptic code. # # Performance hacks: # # - .character_data_handler() has an extra case in which continuing # data is appended to an existing Text node; this can be a # speedup since pyexpat can break up character data into multiple # callbacks even though we set the buffer_text attribute on the # parser. This also gives us the advantage that we don't need a # separate normalization pass. # # - Determining that a node exists is done using an identity comparison # with None rather than a truth test; this avoids searching for and # calling any methods on the node object if it exists. (A rather # nice speedup is achieved this way as well!) from xml.dom import xmlbuilder, minidom, Node from xml.dom import EMPTY_NAMESPACE, EMPTY_PREFIX, XMLNS_NAMESPACE from xml.parsers import expat from xml.dom.minidom import _append_child, _set_attribute_node from xml.dom.NodeFilter import NodeFilter TEXT_NODE = Node.TEXT_NODE CDATA_SECTION_NODE = Node.CDATA_SECTION_NODE DOCUMENT_NODE = Node.DOCUMENT_NODE FILTER_ACCEPT = xmlbuilder.DOMBuilderFilter.FILTER_ACCEPT FILTER_REJECT = xmlbuilder.DOMBuilderFilter.FILTER_REJECT FILTER_SKIP = xmlbuilder.DOMBuilderFilter.FILTER_SKIP FILTER_INTERRUPT = xmlbuilder.DOMBuilderFilter.FILTER_INTERRUPT theDOMImplementation = minidom.getDOMImplementation() # Expat typename -> TypeInfo _typeinfo_map = { "CDATA": minidom.TypeInfo(None, "cdata"), "ENUM": minidom.TypeInfo(None, "enumeration"), "ENTITY": minidom.TypeInfo(None, "entity"), "ENTITIES": minidom.TypeInfo(None, "entities"), "ID": minidom.TypeInfo(None, "id"), "IDREF": minidom.TypeInfo(None, "idref"), "IDREFS": minidom.TypeInfo(None, "idrefs"), "NMTOKEN": minidom.TypeInfo(None, "nmtoken"), "NMTOKENS": minidom.TypeInfo(None, "nmtokens"), } class ElementInfo(object): __slots__ = '_attr_info', '_model', 'tagName' def __init__(self, tagName, model=None): self.tagName = tagName self._attr_info = [] self._model = model def __getstate__(self): return self._attr_info, self._model, self.tagName def __setstate__(self, state): self._attr_info, self._model, self.tagName = state def getAttributeType(self, aname): for info in self._attr_info: if info[1] == aname: t = info[-2] if t[0] == "(": return _typeinfo_map["ENUM"] else: return _typeinfo_map[info[-2]] return minidom._no_type def getAttributeTypeNS(self, namespaceURI, localName): return minidom._no_type def isElementContent(self): if self._model: type = self._model[0] return type not in (expat.model.XML_CTYPE_ANY, expat.model.XML_CTYPE_MIXED) else: return False def isEmpty(self): if self._model: return self._model[0] == expat.model.XML_CTYPE_EMPTY else: return False def isId(self, aname): for info in self._attr_info: if info[1] == aname: return info[-2] == "ID" return False def isIdNS(self, euri, ename, auri, aname): # not sure this is meaningful return self.isId((auri, aname)) def _intern(builder, s): return builder._intern_setdefault(s, s) def _parse_ns_name(builder, name): assert ' ' in name parts = name.split(' ') intern = builder._intern_setdefault if len(parts) == 3: uri, localname, prefix = parts prefix = intern(prefix, prefix) qname = "%s:%s" % (prefix, localname) qname = intern(qname, qname) localname = intern(localname, localname) elif len(parts) == 2: uri, localname = parts prefix = EMPTY_PREFIX qname = localname = intern(localname, localname) else: raise ValueError("Unsupported syntax: spaces in URIs not supported: %r" % name) return intern(uri, uri), localname, prefix, qname class ExpatBuilder: """Document builder that uses Expat to build a ParsedXML.DOM document instance.""" def __init__(self, options=None): if options is None: options = xmlbuilder.Options() self._options = options if self._options.filter is not None: self._filter = FilterVisibilityController(self._options.filter) else: self._filter = None # This *really* doesn't do anything in this case, so # override it with something fast & minimal. self._finish_start_element = id self._parser = None self.reset() def createParser(self): """Create a new parser object.""" return expat.ParserCreate() def getParser(self): """Return the parser object, creating a new one if needed.""" if not self._parser: self._parser = self.createParser() self._intern_setdefault = self._parser.intern.setdefault self._parser.buffer_text = True self._parser.ordered_attributes = True self._parser.specified_attributes = True self.install(self._parser) return self._parser def reset(self): """Free all data structures used during DOM construction.""" self.document = theDOMImplementation.createDocument( EMPTY_NAMESPACE, None, None) self.curNode = self.document self._elem_info = self.document._elem_info self._cdata = False def install(self, parser): """Install the callbacks needed to build the DOM into the parser.""" # This creates circular references! parser.StartDoctypeDeclHandler = self.start_doctype_decl_handler parser.StartElementHandler = self.first_element_handler parser.EndElementHandler = self.end_element_handler parser.ProcessingInstructionHandler = self.pi_handler if self._options.entities: parser.EntityDeclHandler = self.entity_decl_handler parser.NotationDeclHandler = self.notation_decl_handler if self._options.comments: parser.CommentHandler = self.comment_handler if self._options.cdata_sections: parser.StartCdataSectionHandler = self.start_cdata_section_handler parser.EndCdataSectionHandler = self.end_cdata_section_handler parser.CharacterDataHandler = self.character_data_handler_cdata else: parser.CharacterDataHandler = self.character_data_handler parser.ExternalEntityRefHandler = self.external_entity_ref_handler parser.XmlDeclHandler = self.xml_decl_handler parser.ElementDeclHandler = self.element_decl_handler parser.AttlistDeclHandler = self.attlist_decl_handler def parseFile(self, file): """Parse a document from a file object, returning the document node.""" parser = self.getParser() first_buffer = True try: while 1: buffer = file.read(16*1024) if not buffer: break parser.Parse(buffer, False) if first_buffer and self.document.documentElement: self._setup_subset(buffer) first_buffer = False parser.Parse(b"", True) except ParseEscape: pass doc = self.document self.reset() self._parser = None return doc def parseString(self, string): """Parse a document from a string, returning the document node.""" parser = self.getParser() try: parser.Parse(string, True) self._setup_subset(string) except ParseEscape: pass doc = self.document self.reset() self._parser = None return doc def _setup_subset(self, buffer): """Load the internal subset if there might be one.""" if self.document.doctype: extractor = InternalSubsetExtractor() extractor.parseString(buffer) subset = extractor.getSubset() self.document.doctype.internalSubset = subset def start_doctype_decl_handler(self, doctypeName, systemId, publicId, has_internal_subset): doctype = self.document.implementation.createDocumentType( doctypeName, publicId, systemId) doctype.ownerDocument = self.document _append_child(self.document, doctype) self.document.doctype = doctype if self._filter and self._filter.acceptNode(doctype) == FILTER_REJECT: self.document.doctype = None del self.document.childNodes[-1] doctype = None self._parser.EntityDeclHandler = None self._parser.NotationDeclHandler = None if has_internal_subset: if doctype is not None: doctype.entities._seq = [] doctype.notations._seq = [] self._parser.CommentHandler = None self._parser.ProcessingInstructionHandler = None self._parser.EndDoctypeDeclHandler = self.end_doctype_decl_handler def end_doctype_decl_handler(self): if self._options.comments: self._parser.CommentHandler = self.comment_handler self._parser.ProcessingInstructionHandler = self.pi_handler if not (self._elem_info or self._filter): self._finish_end_element = id def pi_handler(self, target, data): node = self.document.createProcessingInstruction(target, data) _append_child(self.curNode, node) if self._filter and self._filter.acceptNode(node) == FILTER_REJECT: self.curNode.removeChild(node) def character_data_handler_cdata(self, data): childNodes = self.curNode.childNodes if self._cdata: if ( self._cdata_continue and childNodes[-1].nodeType == CDATA_SECTION_NODE): childNodes[-1].appendData(data) return node = self.document.createCDATASection(data) self._cdata_continue = True elif childNodes and childNodes[-1].nodeType == TEXT_NODE: node = childNodes[-1] value = node.data + data node.data = value return else: node = minidom.Text() node.data = data node.ownerDocument = self.document _append_child(self.curNode, node) def character_data_handler(self, data): childNodes = self.curNode.childNodes if childNodes and childNodes[-1].nodeType == TEXT_NODE: node = childNodes[-1] node.data = node.data + data return node = minidom.Text() node.data = node.data + data node.ownerDocument = self.document _append_child(self.curNode, node) def entity_decl_handler(self, entityName, is_parameter_entity, value, base, systemId, publicId, notationName): if is_parameter_entity: # we don't care about parameter entities for the DOM return if not self._options.entities: return node = self.document._create_entity(entityName, publicId, systemId, notationName) if value is not None: # internal entity # node *should* be readonly, but we'll cheat child = self.document.createTextNode(value) node.childNodes.append(child) self.document.doctype.entities._seq.append(node) if self._filter and self._filter.acceptNode(node) == FILTER_REJECT: del self.document.doctype.entities._seq[-1] def notation_decl_handler(self, notationName, base, systemId, publicId): node = self.document._create_notation(notationName, publicId, systemId) self.document.doctype.notations._seq.append(node) if self._filter and self._filter.acceptNode(node) == FILTER_ACCEPT: del self.document.doctype.notations._seq[-1] def comment_handler(self, data): node = self.document.createComment(data) _append_child(self.curNode, node) if self._filter and self._filter.acceptNode(node) == FILTER_REJECT: self.curNode.removeChild(node) def start_cdata_section_handler(self): self._cdata = True self._cdata_continue = False def end_cdata_section_handler(self): self._cdata = False self._cdata_continue = False def external_entity_ref_handler(self, context, base, systemId, publicId): return 1 def first_element_handler(self, name, attributes): if self._filter is None and not self._elem_info: self._finish_end_element = id self.getParser().StartElementHandler = self.start_element_handler self.start_element_handler(name, attributes) def start_element_handler(self, name, attributes): node = self.document.createElement(name) _append_child(self.curNode, node) self.curNode = node if attributes: for i in range(0, len(attributes), 2): a = minidom.Attr(attributes[i], EMPTY_NAMESPACE, None, EMPTY_PREFIX) value = attributes[i+1] a.value = value a.ownerDocument = self.document _set_attribute_node(node, a) if node is not self.document.documentElement: self._finish_start_element(node) def _finish_start_element(self, node): if self._filter: # To be general, we'd have to call isSameNode(), but this # is sufficient for minidom: if node is self.document.documentElement: return filt = self._filter.startContainer(node) if filt == FILTER_REJECT: # ignore this node & all descendents Rejecter(self) elif filt == FILTER_SKIP: # ignore this node, but make it's children become # children of the parent node Skipper(self) else: return self.curNode = node.parentNode node.parentNode.removeChild(node) node.unlink() # If this ever changes, Namespaces.end_element_handler() needs to # be changed to match. # def end_element_handler(self, name): curNode = self.curNode self.curNode = curNode.parentNode self._finish_end_element(curNode) def _finish_end_element(self, curNode): info = self._elem_info.get(curNode.tagName) if info: self._handle_white_text_nodes(curNode, info) if self._filter: if curNode is self.document.documentElement: return if self._filter.acceptNode(curNode) == FILTER_REJECT: self.curNode.removeChild(curNode) curNode.unlink() def _handle_white_text_nodes(self, node, info): if (self._options.whitespace_in_element_content or not info.isElementContent()): return # We have element type information and should remove ignorable # whitespace; identify for text nodes which contain only # whitespace. L = [] for child in node.childNodes: if child.nodeType == TEXT_NODE and not child.data.strip(): L.append(child) # Remove ignorable whitespace from the tree. for child in L: node.removeChild(child) def element_decl_handler(self, name, model): info = self._elem_info.get(name) if info is None: self._elem_info[name] = ElementInfo(name, model) else: assert info._model is None info._model = model def attlist_decl_handler(self, elem, name, type, default, required): info = self._elem_info.get(elem) if info is None: info = ElementInfo(elem) self._elem_info[elem] = info info._attr_info.append( [None, name, None, None, default, 0, type, required]) def xml_decl_handler(self, version, encoding, standalone): self.document.version = version self.document.encoding = encoding # This is still a little ugly, thanks to the pyexpat API. ;-( if standalone >= 0: if standalone: self.document.standalone = True else: self.document.standalone = False # Don't include FILTER_INTERRUPT, since that's checked separately # where allowed. _ALLOWED_FILTER_RETURNS = (FILTER_ACCEPT, FILTER_REJECT, FILTER_SKIP) class FilterVisibilityController(object): """Wrapper around a DOMBuilderFilter which implements the checks to make the whatToShow filter attribute work.""" __slots__ = 'filter', def __init__(self, filter): self.filter = filter def startContainer(self, node): mask = self._nodetype_mask[node.nodeType] if self.filter.whatToShow & mask: val = self.filter.startContainer(node) if val == FILTER_INTERRUPT: raise ParseEscape if val not in _ALLOWED_FILTER_RETURNS: raise ValueError( "startContainer() returned illegal value: " + repr(val)) return val else: return FILTER_ACCEPT def acceptNode(self, node): mask = self._nodetype_mask[node.nodeType] if self.filter.whatToShow & mask: val = self.filter.acceptNode(node) if val == FILTER_INTERRUPT: raise ParseEscape if val == FILTER_SKIP: # move all child nodes to the parent, and remove this node parent = node.parentNode for child in node.childNodes[:]: parent.appendChild(child) # node is handled by the caller return FILTER_REJECT if val not in _ALLOWED_FILTER_RETURNS: raise ValueError( "acceptNode() returned illegal value: " + repr(val)) return val else: return FILTER_ACCEPT _nodetype_mask = { Node.ELEMENT_NODE: NodeFilter.SHOW_ELEMENT, Node.ATTRIBUTE_NODE: NodeFilter.SHOW_ATTRIBUTE, Node.TEXT_NODE: NodeFilter.SHOW_TEXT, Node.CDATA_SECTION_NODE: NodeFilter.SHOW_CDATA_SECTION, Node.ENTITY_REFERENCE_NODE: NodeFilter.SHOW_ENTITY_REFERENCE, Node.ENTITY_NODE: NodeFilter.SHOW_ENTITY, Node.PROCESSING_INSTRUCTION_NODE: NodeFilter.SHOW_PROCESSING_INSTRUCTION, Node.COMMENT_NODE: NodeFilter.SHOW_COMMENT, Node.DOCUMENT_NODE: NodeFilter.SHOW_DOCUMENT, Node.DOCUMENT_TYPE_NODE: NodeFilter.SHOW_DOCUMENT_TYPE, Node.DOCUMENT_FRAGMENT_NODE: NodeFilter.SHOW_DOCUMENT_FRAGMENT, Node.NOTATION_NODE: NodeFilter.SHOW_NOTATION, } class FilterCrutch(object): __slots__ = '_builder', '_level', '_old_start', '_old_end' def __init__(self, builder): self._level = 0 self._builder = builder parser = builder._parser self._old_start = parser.StartElementHandler self._old_end = parser.EndElementHandler parser.StartElementHandler = self.start_element_handler parser.EndElementHandler = self.end_element_handler class Rejecter(FilterCrutch): __slots__ = () def __init__(self, builder): FilterCrutch.__init__(self, builder) parser = builder._parser for name in ("ProcessingInstructionHandler", "CommentHandler", "CharacterDataHandler", "StartCdataSectionHandler", "EndCdataSectionHandler", "ExternalEntityRefHandler", ): setattr(parser, name, None) def start_element_handler(self, *args): self._level = self._level + 1 def end_element_handler(self, *args): if self._level == 0: # restore the old handlers parser = self._builder._parser self._builder.install(parser) parser.StartElementHandler = self._old_start parser.EndElementHandler = self._old_end else: self._level = self._level - 1 class Skipper(FilterCrutch): __slots__ = () def start_element_handler(self, *args): node = self._builder.curNode self._old_start(*args) if self._builder.curNode is not node: self._level = self._level + 1 def end_element_handler(self, *args): if self._level == 0: # We're popping back out of the node we're skipping, so we # shouldn't need to do anything but reset the handlers. self._builder._parser.StartElementHandler = self._old_start self._builder._parser.EndElementHandler = self._old_end self._builder = None else: self._level = self._level - 1 self._old_end(*args) # framework document used by the fragment builder. # Takes a string for the doctype, subset string, and namespace attrs string. _FRAGMENT_BUILDER_INTERNAL_SYSTEM_ID = \ "http://xml.python.org/entities/fragment-builder/internal" _FRAGMENT_BUILDER_TEMPLATE = ( '''\ %%s ]> &fragment-builder-internal;''' % _FRAGMENT_BUILDER_INTERNAL_SYSTEM_ID) class FragmentBuilder(ExpatBuilder): """Builder which constructs document fragments given XML source text and a context node. The context node is expected to provide information about the namespace declarations which are in scope at the start of the fragment. """ def __init__(self, context, options=None): if context.nodeType == DOCUMENT_NODE: self.originalDocument = context self.context = context else: self.originalDocument = context.ownerDocument self.context = context ExpatBuilder.__init__(self, options) def reset(self): ExpatBuilder.reset(self) self.fragment = None def parseFile(self, file): """Parse a document fragment from a file object, returning the fragment node.""" return self.parseString(file.read()) def parseString(self, string): """Parse a document fragment from a string, returning the fragment node.""" self._source = string parser = self.getParser() doctype = self.originalDocument.doctype ident = "" if doctype: subset = doctype.internalSubset or self._getDeclarations() if doctype.publicId: ident = ('PUBLIC "%s" "%s"' % (doctype.publicId, doctype.systemId)) elif doctype.systemId: ident = 'SYSTEM "%s"' % doctype.systemId else: subset = "" nsattrs = self._getNSattrs() # get ns decls from node's ancestors document = _FRAGMENT_BUILDER_TEMPLATE % (ident, subset, nsattrs) try: parser.Parse(document, True) except: self.reset() raise fragment = self.fragment self.reset() ## self._parser = None return fragment def _getDeclarations(self): """Re-create the internal subset from the DocumentType node. This is only needed if we don't already have the internalSubset as a string. """ doctype = self.context.ownerDocument.doctype s = "" if doctype: for i in range(doctype.notations.length): notation = doctype.notations.item(i) if s: s = s + "\n " s = "%s' \ % (s, notation.publicId, notation.systemId) else: s = '%s SYSTEM "%s">' % (s, notation.systemId) for i in range(doctype.entities.length): entity = doctype.entities.item(i) if s: s = s + "\n " s = "%s" return s def _getNSattrs(self): return "" def external_entity_ref_handler(self, context, base, systemId, publicId): if systemId == _FRAGMENT_BUILDER_INTERNAL_SYSTEM_ID: # this entref is the one that we made to put the subtree # in; all of our given input is parsed in here. old_document = self.document old_cur_node = self.curNode parser = self._parser.ExternalEntityParserCreate(context) # put the real document back, parse into the fragment to return self.document = self.originalDocument self.fragment = self.document.createDocumentFragment() self.curNode = self.fragment try: parser.Parse(self._source, True) finally: self.curNode = old_cur_node self.document = old_document self._source = None return -1 else: return ExpatBuilder.external_entity_ref_handler( self, context, base, systemId, publicId) class Namespaces: """Mix-in class for builders; adds support for namespaces.""" def _initNamespaces(self): # list of (prefix, uri) ns declarations. Namespace attrs are # constructed from this and added to the element's attrs. self._ns_ordered_prefixes = [] def createParser(self): """Create a new namespace-handling parser.""" parser = expat.ParserCreate(namespace_separator=" ") parser.namespace_prefixes = True return parser def install(self, parser): """Insert the namespace-handlers onto the parser.""" ExpatBuilder.install(self, parser) if self._options.namespace_declarations: parser.StartNamespaceDeclHandler = ( self.start_namespace_decl_handler) def start_namespace_decl_handler(self, prefix, uri): """Push this namespace declaration on our storage.""" self._ns_ordered_prefixes.append((prefix, uri)) def start_element_handler(self, name, attributes): if ' ' in name: uri, localname, prefix, qname = _parse_ns_name(self, name) else: uri = EMPTY_NAMESPACE qname = name localname = None prefix = EMPTY_PREFIX node = minidom.Element(qname, uri, prefix, localname) node.ownerDocument = self.document _append_child(self.curNode, node) self.curNode = node if self._ns_ordered_prefixes: for prefix, uri in self._ns_ordered_prefixes: if prefix: a = minidom.Attr(_intern(self, 'xmlns:' + prefix), XMLNS_NAMESPACE, prefix, "xmlns") else: a = minidom.Attr("xmlns", XMLNS_NAMESPACE, "xmlns", EMPTY_PREFIX) a.value = uri a.ownerDocument = self.document _set_attribute_node(node, a) del self._ns_ordered_prefixes[:] if attributes: node._ensure_attributes() _attrs = node._attrs _attrsNS = node._attrsNS for i in range(0, len(attributes), 2): aname = attributes[i] value = attributes[i+1] if ' ' in aname: uri, localname, prefix, qname = _parse_ns_name(self, aname) a = minidom.Attr(qname, uri, localname, prefix) _attrs[qname] = a _attrsNS[(uri, localname)] = a else: a = minidom.Attr(aname, EMPTY_NAMESPACE, aname, EMPTY_PREFIX) _attrs[aname] = a _attrsNS[(EMPTY_NAMESPACE, aname)] = a a.ownerDocument = self.document a.value = value a.ownerElement = node if __debug__: # This only adds some asserts to the original # end_element_handler(), so we only define this when -O is not # used. If changing one, be sure to check the other to see if # it needs to be changed as well. # def end_element_handler(self, name): curNode = self.curNode if ' ' in name: uri, localname, prefix, qname = _parse_ns_name(self, name) assert (curNode.namespaceURI == uri and curNode.localName == localname and curNode.prefix == prefix), \ "element stack messed up! (namespace)" else: assert curNode.nodeName == name, \ "element stack messed up - bad nodeName" assert curNode.namespaceURI == EMPTY_NAMESPACE, \ "element stack messed up - bad namespaceURI" self.curNode = curNode.parentNode self._finish_end_element(curNode) class ExpatBuilderNS(Namespaces, ExpatBuilder): """Document builder that supports namespaces.""" def reset(self): ExpatBuilder.reset(self) self._initNamespaces() class FragmentBuilderNS(Namespaces, FragmentBuilder): """Fragment builder that supports namespaces.""" def reset(self): FragmentBuilder.reset(self) self._initNamespaces() def _getNSattrs(self): """Return string of namespace attributes from this element and ancestors.""" # XXX This needs to be re-written to walk the ancestors of the # context to build up the namespace information from # declarations, elements, and attributes found in context. # Otherwise we have to store a bunch more data on the DOM # (though that *might* be more reliable -- not clear). attrs = "" context = self.context L = [] while context: if hasattr(context, '_ns_prefix_uri'): for prefix, uri in context._ns_prefix_uri.items(): # add every new NS decl from context to L and attrs string if prefix in L: continue L.append(prefix) if prefix: declname = "xmlns:" + prefix else: declname = "xmlns" if attrs: attrs = "%s\n %s='%s'" % (attrs, declname, uri) else: attrs = " %s='%s'" % (declname, uri) context = context.parentNode return attrs class ParseEscape(Exception): """Exception raised to short-circuit parsing in InternalSubsetExtractor.""" pass class InternalSubsetExtractor(ExpatBuilder): """XML processor which can rip out the internal document type subset.""" subset = None def getSubset(self): """Return the internal subset as a string.""" return self.subset def parseFile(self, file): try: ExpatBuilder.parseFile(self, file) except ParseEscape: pass def parseString(self, string): try: ExpatBuilder.parseString(self, string) except ParseEscape: pass def install(self, parser): parser.StartDoctypeDeclHandler = self.start_doctype_decl_handler parser.StartElementHandler = self.start_element_handler def start_doctype_decl_handler(self, name, publicId, systemId, has_internal_subset): if has_internal_subset: parser = self.getParser() self.subset = [] parser.DefaultHandler = self.subset.append parser.EndDoctypeDeclHandler = self.end_doctype_decl_handler else: raise ParseEscape() def end_doctype_decl_handler(self): s = ''.join(self.subset).replace('\r\n', '\n').replace('\r', '\n') self.subset = s raise ParseEscape() def start_element_handler(self, name, attrs): raise ParseEscape() def parse(file, namespaces=True): """Parse a document, returning the resulting Document node. 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ELEMENT_NODE = 1 ATTRIBUTE_NODE = 2 TEXT_NODE = 3 CDATA_SECTION_NODE = 4 ENTITY_REFERENCE_NODE = 5 ENTITY_NODE = 6 PROCESSING_INSTRUCTION_NODE = 7 COMMENT_NODE = 8 DOCUMENT_NODE = 9 DOCUMENT_TYPE_NODE = 10 DOCUMENT_FRAGMENT_NODE = 11 NOTATION_NODE = 12 #ExceptionCode INDEX_SIZE_ERR = 1 DOMSTRING_SIZE_ERR = 2 HIERARCHY_REQUEST_ERR = 3 WRONG_DOCUMENT_ERR = 4 INVALID_CHARACTER_ERR = 5 NO_DATA_ALLOWED_ERR = 6 NO_MODIFICATION_ALLOWED_ERR = 7 NOT_FOUND_ERR = 8 NOT_SUPPORTED_ERR = 9 INUSE_ATTRIBUTE_ERR = 10 INVALID_STATE_ERR = 11 SYNTAX_ERR = 12 INVALID_MODIFICATION_ERR = 13 NAMESPACE_ERR = 14 INVALID_ACCESS_ERR = 15 VALIDATION_ERR = 16 class DOMException(Exception): """Abstract base class for DOM exceptions. 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