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import _base
import new
moduleCache = {}
def getETreeModule(ElementTreeImplementation, fullTree=False):
name = "_" + ElementTreeImplementation.__name__+"builder"
if name in moduleCache:
return moduleCache[name]
else:
mod = new.module("_" + ElementTreeImplementation.__name__+"builder")
objs = getETreeBuilder(ElementTreeImplementation, fullTree)
mod.__dict__.update(objs)
moduleCache[name] = mod
return mod
def getETreeBuilder(ElementTreeImplementation, fullTree=False):
ElementTree = ElementTreeImplementation
class Element(_base.Node):
def __init__(self, name):
self._element = ElementTree.Element(name)
self.name = name
self.parent = None
self._childNodes = []
self._flags = []
def _setName(self, name):
self._element.tag = name
def _getName(self):
return self._element.tag
name = property(_getName, _setName)
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 self._element.attrib.keys():
del self._element.attrib[key]
for key, value in attributes.iteritems():
self._element.set(key, 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 self._element.getchildren())
def appendChild(self, node):
self._childNodes.append(node)
self._element.append(node._element)
node.parent = self
def insertBefore(self, node, refNode):
index = self._element.getchildren().index(refNode._element)
self._element.insert(index, node._element)
node.parent = self
def removeChild(self, 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 = self._element.getchildren()
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 = Element(self.name)
for name, value in self.attributes.iteritems():
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):
Element.__init__(self, "<!DOCTYPE>")
self._element.text = name
def _getPublicId(self):
return self._element.get(u"publicId", None)
def _setPublicId(self, value):
if value is not None:
self._element.set(u"publicId", value)
publicId = property(_getPublicId, _setPublicId)
def _getSystemId(self):
return self._element.get(u"systemId", None)
def _setSystemId(self, value):
if value is not None:
self._element.set(u"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 = []
finalText = None
def serializeElement(element, indent=0):
if not(hasattr(element, "tag")):
element = element.getroot()
if element.tag == "<!DOCTYPE>":
rv.append("|%s<!DOCTYPE %s>"%(' '*indent, element.text))
elif element.tag == "<DOCUMENT_ROOT>":
rv.append("#document")
if element.text:
rv.append("|%s\"%s\""%(' '*(indent+2), element.text))
if element.tail:
finalText = element.tail
elif type(element.tag) == type(ElementTree.Comment):
rv.append("|%s<!-- %s -->"%(' '*indent, element.text))
else:
rv.append("|%s<%s>"%(' '*indent, element.tag))
if hasattr(element, "attrib"):
for name, value in element.attrib.iteritems():
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.getchildren():
serializeElement(child, indent)
if element.tail:
rv.append("|%s\"%s\"" %(' '*(indent-2), element.tail))
serializeElement(element, 0)
if finalText is not None:
rv.append("|%s\"%s\""%(' '*2, finalText))
return "\n".join(rv)
def tostring(element):
"""Serialize an element and its child nodes to a string"""
rv = []
finalText = None
def serializeElement(element):
if type(element) == type(ElementTree.ElementTree):
element = element.getroot()
if element.tag == "<!DOCTYPE>":
rv.append("<!DOCTYPE %s>"%(element.text,))
elif element.tag == "<DOCUMENT_ROOT>":
if element.text:
rv.append(element.text)
if element.tail:
finalText = element.tail
for child in element.getchildren():
serializeElement(child)
elif type(element.tag) == type(ElementTree.Comment):
rv.append("<!--%s-->"%(element.text,))
else:
#This is assumed to be an ordinary element
if not element.attrib:
rv.append("<%s>"%(element.tag,))
else:
attr = " ".join(["%s=\"%s\""%(name, value)
for name, value in element.attrib.iteritems()])
rv.append("<%s %s>"%(element.tag, attr))
if element.text:
rv.append(element.text)
for child in element.getchildren():
serializeElement(child)
rv.append("</%s>"%(element.tag,))
if element.tail:
rv.append(element.tail)
serializeElement(element)
if finalText is not None:
rv.append("%s\""%(' '*2, finalText))
return "".join(rv)
class TreeBuilder(_base.TreeBuilder):
documentClass = Document
doctypeClass = DocumentType
elementClass = Element
commentClass = Comment
fragmentClass = DocumentFragment
def testSerializer(self, element):
return testSerializer(element)
def getDocument(self):
if fullTree:
return self.document._element
else:
return self.document._element.find("html")
def getFragment(self):
return _base.TreeBuilder.getFragment(self)._element
return locals()