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lib
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python3.6
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site-packages
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html5lib
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treebuilders
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etree.py
from __future__ import absolute_import, division, unicode_literals # pylint:disable=protected-access from six import text_type import re from . import base from .. import _ihatexml from .. import constants from ..constants import namespaces from .._utils import moduleFactoryFactory tag_regexp = re.compile("{([^}]*)}(.*)") def getETreeBuilder(ElementTreeImplementation, fullTree=False): ElementTree = ElementTreeImplementation ElementTreeCommentType = ElementTree.Comment("asd").tag class Element(base.Node): def __init__(self, name, namespace=None): self._name = name self._namespace = namespace self._element = ElementTree.Element(self._getETreeTag(name, namespace)) if namespace is None: self.nameTuple = namespaces["html"], self._name else: self.nameTuple = self._namespace, self._name self.parent = None self._childNodes = [] self._flags = [] def _getETreeTag(self, name, namespace): if namespace is None: etree_tag = name else: etree_tag = "{%s}%s" % (namespace, name) return etree_tag def _setName(self, name): self._name = name self._element.tag = self._getETreeTag(self._name, self._namespace) def _getName(self): return self._name name = property(_getName, _setName) def _setNamespace(self, namespace): self._namespace = namespace self._element.tag = self._getETreeTag(self._name, self._namespace) def _getNamespace(self): return self._namespace namespace = property(_getNamespace, _setNamespace) def _getAttributes(self): return self._element.attrib def _setAttributes(self, attributes): # Delete existing attributes first # XXX - there may be a better way to do this... for key in list(self._element.attrib.keys()): del self._element.attrib[key] for key, value in attributes.items(): if isinstance(key, tuple): name = "{%s}%s" % (key[2], key[1]) else: name = key self._element.set(name, value) attributes = property(_getAttributes, _setAttributes) def _getChildNodes(self): return self._childNodes def _setChildNodes(self, value): del self._element[:] self._childNodes = [] for element in value: self.insertChild(element) childNodes = property(_getChildNodes, _setChildNodes) def hasContent(self): """Return true if the node has children or text""" return bool(self._element.text or len(self._element)) def appendChild(self, node): self._childNodes.append(node) self._element.append(node._element) node.parent = self def insertBefore(self, node, refNode): index = list(self._element).index(refNode._element) self._element.insert(index, node._element) node.parent = self def removeChild(self, node): self._childNodes.remove(node) self._element.remove(node._element) node.parent = None def insertText(self, data, insertBefore=None): if not(len(self._element)): if not self._element.text: self._element.text = "" self._element.text += data elif insertBefore is None: # Insert the text as the tail of the last child element if not self._element[-1].tail: self._element[-1].tail = "" self._element[-1].tail += data else: # Insert the text before the specified node children = list(self._element) index = children.index(insertBefore._element) if index > 0: if not self._element[index - 1].tail: self._element[index - 1].tail = "" self._element[index - 1].tail += data else: if not self._element.text: self._element.text = "" self._element.text += data def cloneNode(self): element = type(self)(self.name, self.namespace) for name, value in self.attributes.items(): element.attributes[name] = value return element def reparentChildren(self, newParent): if newParent.childNodes: newParent.childNodes[-1]._element.tail += self._element.text else: if not newParent._element.text: newParent._element.text = "" if self._element.text is not None: newParent._element.text += self._element.text self._element.text = "" base.Node.reparentChildren(self, newParent) class Comment(Element): def __init__(self, data): # Use the superclass constructor to set all properties on the # wrapper element self._element = ElementTree.Comment(data) self.parent = None self._childNodes = [] self._flags = [] def _getData(self): return self._element.text def _setData(self, value): self._element.text = value data = property(_getData, _setData) class DocumentType(Element): def __init__(self, name, publicId, systemId): Element.__init__(self, "<!DOCTYPE>") self._element.text = name self.publicId = publicId self.systemId = systemId def _getPublicId(self): return self._element.get("publicId", "") def _setPublicId(self, value): if value is not None: self._element.set("publicId", value) publicId = property(_getPublicId, _setPublicId) def _getSystemId(self): return self._element.get("systemId", "") def _setSystemId(self, value): if value is not None: self._element.set("systemId", value) systemId = property(_getSystemId, _setSystemId) class Document(Element): def __init__(self): Element.__init__(self, "DOCUMENT_ROOT") class DocumentFragment(Element): def __init__(self): Element.__init__(self, "DOCUMENT_FRAGMENT") def testSerializer(element): rv = [] def serializeElement(element, indent=0): if not(hasattr(element, "tag")): element = element.getroot() if element.tag == "<!DOCTYPE>": if element.get("publicId") or element.get("systemId"): publicId = element.get("publicId") or "" systemId = element.get("systemId") or "" rv.append("""<!DOCTYPE %s "%s" "%s">""" % (element.text, publicId, systemId)) else: rv.append("<!DOCTYPE %s>" % (element.text,)) elif element.tag == "DOCUMENT_ROOT": rv.append("#document") if element.text is not None: rv.append("|%s\"%s\"" % (' ' * (indent + 2), element.text)) if element.tail is not None: raise TypeError("Document node cannot have tail") if hasattr(element, "attrib") and len(element.attrib): raise TypeError("Document node cannot have attributes") elif element.tag == ElementTreeCommentType: rv.append("|%s<!-- %s -->" % (' ' * indent, element.text)) else: assert isinstance(element.tag, text_type), \ "Expected unicode, got %s, %s" % (type(element.tag), element.tag) nsmatch = tag_regexp.match(element.tag) if nsmatch is None: name = element.tag else: ns, name = nsmatch.groups() prefix = constants.prefixes[ns] name = "%s %s" % (prefix, name) rv.append("|%s<%s>" % (' ' * indent, name)) if hasattr(element, "attrib"): attributes = [] for name, value in element.attrib.items(): nsmatch = tag_regexp.match(name) if nsmatch is not None: ns, name = nsmatch.groups() prefix = constants.prefixes[ns] attr_string = "%s %s" % (prefix, name) else: attr_string = name attributes.append((attr_string, value)) for name, value in sorted(attributes): rv.append('|%s%s="%s"' % (' ' * (indent + 2), name, value)) if element.text: rv.append("|%s\"%s\"" % (' ' * (indent + 2), element.text)) indent += 2 for child in element: serializeElement(child, indent) if element.tail: rv.append("|%s\"%s\"" % (' ' * (indent - 2), element.tail)) serializeElement(element, 0) return "\n".join(rv) def tostring(element): # pylint:disable=unused-variable """Serialize an element and its child nodes to a string""" rv = [] filter = _ihatexml.InfosetFilter() def serializeElement(element): if isinstance(element, ElementTree.ElementTree): element = element.getroot() if element.tag == "<!DOCTYPE>": if element.get("publicId") or element.get("systemId"): publicId = element.get("publicId") or "" systemId = element.get("systemId") or "" rv.append("""<!DOCTYPE %s PUBLIC "%s" "%s">""" % (element.text, publicId, systemId)) else: rv.append("<!DOCTYPE %s>" % (element.text,)) elif element.tag == "DOCUMENT_ROOT": if element.text is not None: rv.append(element.text) if element.tail is not None: raise TypeError("Document node cannot have tail") if hasattr(element, "attrib") and len(element.attrib): raise TypeError("Document node cannot have attributes") for child in element: serializeElement(child) elif element.tag == ElementTreeCommentType: rv.append("<!--%s-->" % (element.text,)) else: # This is assumed to be an ordinary element if not element.attrib: rv.append("<%s>" % (filter.fromXmlName(element.tag),)) else: attr = " ".join(["%s=\"%s\"" % ( filter.fromXmlName(name), value) for name, value in element.attrib.items()]) rv.append("<%s %s>" % (element.tag, attr)) if element.text: rv.append(element.text) for child in element: serializeElement(child) rv.append("</%s>" % (element.tag,)) if element.tail: rv.append(element.tail) serializeElement(element) return "".join(rv) class TreeBuilder(base.TreeBuilder): # pylint:disable=unused-variable documentClass = Document doctypeClass = DocumentType elementClass = Element commentClass = Comment fragmentClass = DocumentFragment implementation = ElementTreeImplementation def testSerializer(self, element): return testSerializer(element) def getDocument(self): if fullTree: return self.document._element else: if self.defaultNamespace is not None: return self.document._element.find( "{%s}html" % self.defaultNamespace) else: return self.document._element.find("html") def getFragment(self): return base.TreeBuilder.getFragment(self)._element return locals() getETreeModule = moduleFactoryFactory(getETreeBuilder)
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