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