blob: 95be475578dad1598b9f7209ab8d4319f8282ee8 [file] [log] [blame]
try:
from types import ModuleType
except:
from new import module as ModuleType
import re
import types
import _base
from html5lib import ihatexml
from html5lib import constants
from html5lib.constants import namespaces
tag_regexp = re.compile("{([^}]*)}(.*)")
moduleCache = {}
def getETreeModule(ElementTreeImplementation, fullTree=False):
name = "_" + ElementTreeImplementation.__name__+"builder"
if name in moduleCache:
return moduleCache[name]
else:
mod = ModuleType("_" + 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, 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 self._element.attrib.keys():
del self._element.attrib[key]
for key, value in attributes.iteritems():
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._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.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, publicId, systemId):
Element.__init__(self, "<!DOCTYPE>")
self._element.text = name
self.publicId = publicId
self.systemId = systemId
def _getPublicId(self):
return self._element.get(u"publicId", "")
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", "")
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>":
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:
rv.append("|%s\"%s\""%(' '*(indent+2), element.text))
if element.tail:
finalText = element.tail
elif element.tag == ElementTree.Comment:
rv.append("|%s<!-- %s -->"%(' '*indent, element.text))
else:
assert type(element.tag) in types.StringTypes, "Expected unicode, got %s"%type(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.iteritems():
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)
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
filter = ihatexml.InfosetFilter()
def serializeElement(element):
if type(element) == type(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:
rv.append(element.text)
if element.tail:
finalText = element.tail
for child in element:
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>"%(filter.fromXmlName(element.tag),))
else:
attr = " ".join(["%s=\"%s\""%(
filter.fromXmlName(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:
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:
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()