mirror of
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b417be2ad9
Rearrange pulldom to create documents with root element. Provide clear methods so that the ContentHandler releases its hold on the document.
781 lines
25 KiB
Python
781 lines
25 KiB
Python
"""\
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minidom.py -- a lightweight DOM implementation.
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parse("foo.xml")
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parseString("<foo><bar/></foo>")
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Todo:
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=====
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* convenience methods for getting elements and text.
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* more testing
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* bring some of the writer and linearizer code into conformance with this
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interface
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* SAX 2 namespaces
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"""
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import string
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_string = string
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del string
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from xml.dom import HierarchyRequestErr
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# localize the types, and allow support for Unicode values if available:
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import types
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_TupleType = types.TupleType
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try:
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_StringTypes = (types.StringType, types.UnicodeType)
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except AttributeError:
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_StringTypes = (types.StringType,)
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del types
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import xml.dom
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_Node = xml.dom.Node
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class Node(_Node):
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allnodes = {}
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_debug = 0
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_makeParentNodes = 1
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debug = None
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childNodeTypes = ()
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def __init__(self):
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self.childNodes = []
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self.parentNode = None
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if Node._debug:
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index = repr(id(self)) + repr(self.__class__)
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Node.allnodes[index] = repr(self.__dict__)
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if Node.debug is None:
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Node.debug = _get_StringIO()
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#open("debug4.out", "w")
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Node.debug.write("create %s\n" % index)
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def __getattr__(self, key):
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if key[0:2] == "__":
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raise AttributeError, key
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# getattr should never call getattr!
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if self.__dict__.has_key("inGetAttr"):
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del self.inGetAttr
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raise AttributeError, key
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prefix, attrname = key[:5], key[5:]
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if prefix == "_get_":
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self.inGetAttr = 1
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if hasattr(self, attrname):
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del self.inGetAttr
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return (lambda self=self, attrname=attrname:
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getattr(self, attrname))
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else:
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del self.inGetAttr
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raise AttributeError, key
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else:
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self.inGetAttr = 1
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try:
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func = getattr(self, "_get_" + key)
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except AttributeError:
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raise AttributeError, key
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del self.inGetAttr
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return func()
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def __nonzero__(self):
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return 1
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def toxml(self):
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writer = _get_StringIO()
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self.writexml(writer)
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return writer.getvalue()
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def toprettyxml(self, indent="\t", newl="\n"):
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# indent = the indentation string to prepend, per level
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# newl = the newline string to append
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writer = _get_StringIO()
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self.writexml(writer, "", indent, newl)
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return writer.getvalue()
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def hasChildNodes(self):
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if self.childNodes:
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return 1
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else:
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return 0
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def _get_firstChild(self):
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if self.childNodes:
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return self.childNodes[0]
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def _get_lastChild(self):
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if self.childNodes:
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return self.childNodes[-1]
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def insertBefore(self, newChild, refChild):
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if newChild.nodeType not in self.childNodeTypes:
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raise HierarchyRequestErr, \
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"%s cannot be child of %s" % (repr(newChild), repr(self))
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if newChild.parentNode is not None:
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newChild.parentNode.removeChild(newChild)
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if refChild is None:
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self.appendChild(newChild)
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else:
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index = self.childNodes.index(refChild)
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self.childNodes.insert(index, newChild)
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newChild.nextSibling = refChild
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refChild.previousSibling = newChild
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if index:
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node = self.childNodes[index-1]
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node.nextSibling = newChild
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newChild.previousSibling = node
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else:
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newChild.previousSibling = None
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if self._makeParentNodes:
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newChild.parentNode = self
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return newChild
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def appendChild(self, node):
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if node.nodeType not in self.childNodeTypes:
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raise HierarchyRequestErr, \
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"%s cannot be child of %s" % (repr(node), repr(self))
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if node.parentNode is not None:
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node.parentNode.removeChild(node)
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if self.childNodes:
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last = self.lastChild
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node.previousSibling = last
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last.nextSibling = node
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else:
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node.previousSibling = None
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node.nextSibling = None
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self.childNodes.append(node)
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if self._makeParentNodes:
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node.parentNode = self
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return node
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def replaceChild(self, newChild, oldChild):
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if newChild.nodeType not in self.childNodeTypes:
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raise HierarchyRequestErr, \
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"%s cannot be child of %s" % (repr(newChild), repr(self))
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if newChild.parentNode is not None:
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newChild.parentNode.removeChild(newChild)
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if newChild is oldChild:
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return
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index = self.childNodes.index(oldChild)
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self.childNodes[index] = newChild
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if self._makeParentNodes:
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newChild.parentNode = self
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oldChild.parentNode = None
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newChild.nextSibling = oldChild.nextSibling
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newChild.previousSibling = oldChild.previousSibling
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oldChild.nextSibling = None
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oldChild.previousSibling = None
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if newChild.previousSibling:
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newChild.previousSibling.nextSibling = newChild
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if newChild.nextSibling:
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newChild.nextSibling.previousSibling = newChild
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return oldChild
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def removeChild(self, oldChild):
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self.childNodes.remove(oldChild)
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if oldChild.nextSibling is not None:
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oldChild.nextSibling.previousSibling = oldChild.previousSibling
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if oldChild.previousSibling is not None:
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oldChild.previousSibling.nextSibling = oldChild.nextSibling
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oldChild.nextSibling = oldChild.previousSibling = None
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if self._makeParentNodes:
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oldChild.parentNode = None
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return oldChild
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def normalize(self):
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L = []
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for child in self.childNodes:
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if child.nodeType == Node.TEXT_NODE:
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data = child.data
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if data and L and L[-1].nodeType == child.nodeType:
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# collapse text node
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node = L[-1]
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node.data = node.nodeValue = node.data + child.data
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node.nextSibling = child.nextSibling
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child.unlink()
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elif data:
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if L:
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L[-1].nextSibling = child
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child.previousSibling = L[-1]
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else:
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child.previousSibling = None
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L.append(child)
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else:
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# empty text node; discard
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child.unlink()
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else:
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if L:
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L[-1].nextSibling = child
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child.previousSibling = L[-1]
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else:
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child.previousSibling = None
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L.append(child)
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if child.nodeType == Node.ELEMENT_NODE:
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child.normalize()
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self.childNodes[:] = L
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def cloneNode(self, deep):
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import new
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clone = new.instance(self.__class__, self.__dict__.copy())
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if self._makeParentNodes:
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clone.parentNode = None
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clone.childNodes = []
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if deep:
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for child in self.childNodes:
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clone.appendChild(child.cloneNode(1))
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return clone
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# DOM Level 3 (Working Draft 2001-Jan-26)
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def isSameNode(self, other):
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return self is other
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# minidom-specific API:
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def unlink(self):
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self.parentNode = None
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for child in self.childNodes:
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child.unlink()
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self.childNodes = None
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self.previousSibling = None
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self.nextSibling = None
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if Node._debug:
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index = repr(id(self)) + repr(self.__class__)
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self.debug.write("Deleting: %s\n" % index)
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del Node.allnodes[index]
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def _write_data(writer, data):
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"Writes datachars to writer."
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replace = _string.replace
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data = replace(data, "&", "&")
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data = replace(data, "<", "<")
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data = replace(data, "\"", """)
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data = replace(data, ">", ">")
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writer.write(data)
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def _getElementsByTagNameHelper(parent, name, rc):
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for node in parent.childNodes:
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if node.nodeType == Node.ELEMENT_NODE and \
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(name == "*" or node.tagName == name):
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rc.append(node)
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_getElementsByTagNameHelper(node, name, rc)
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return rc
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def _getElementsByTagNameNSHelper(parent, nsURI, localName, rc):
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for node in parent.childNodes:
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if node.nodeType == Node.ELEMENT_NODE:
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if ((localName == "*" or node.tagName == localName) and
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(nsURI == "*" or node.namespaceURI == nsURI)):
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rc.append(node)
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_getElementsByTagNameNSHelper(node, nsURI, localName, rc)
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return rc
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class Attr(Node):
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nodeType = Node.ATTRIBUTE_NODE
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attributes = None
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ownerElement = None
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childNodeTypes = (Node.TEXT_NODE, Node.ENTITY_REFERENCE_NODE)
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def __init__(self, qName, namespaceURI="", localName=None, prefix=None):
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# skip setattr for performance
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d = self.__dict__
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d["localName"] = localName or qName
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d["nodeName"] = d["name"] = qName
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d["namespaceURI"] = namespaceURI
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d["prefix"] = prefix
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Node.__init__(self)
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# nodeValue and value are set elsewhere
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def __setattr__(self, name, value):
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d = self.__dict__
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if name in ("value", "nodeValue"):
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d["value"] = d["nodeValue"] = value
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elif name in ("name", "nodeName"):
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d["name"] = d["nodeName"] = value
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else:
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d[name] = value
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def cloneNode(self, deep):
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clone = Node.cloneNode(self, deep)
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if clone.__dict__.has_key("ownerElement"):
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del clone.ownerElement
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return clone
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class NamedNodeMap:
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"""The attribute list is a transient interface to the underlying
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dictionaries. Mutations here will change the underlying element's
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dictionary.
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Ordering is imposed artificially and does not reflect the order of
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attributes as found in an input document.
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"""
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def __init__(self, attrs, attrsNS):
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self._attrs = attrs
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self._attrsNS = attrsNS
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def __getattr__(self, name):
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if name == "length":
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return len(self._attrs)
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raise AttributeError, name
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def item(self, index):
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try:
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return self[self._attrs.keys()[index]]
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except IndexError:
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return None
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def items(self):
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L = []
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for node in self._attrs.values():
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L.append((node.nodeName, node.value))
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return L
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def itemsNS(self):
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L = []
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for node in self._attrs.values():
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L.append(((node.URI, node.localName), node.value))
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return L
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def keys(self):
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return self._attrs.keys()
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def keysNS(self):
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return self._attrsNS.keys()
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def values(self):
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return self._attrs.values()
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def get(self, name, value = None):
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return self._attrs.get(name, value)
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def __len__(self):
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return self.length
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def __cmp__(self, other):
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if self._attrs is getattr(other, "_attrs", None):
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return 0
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else:
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return cmp(id(self), id(other))
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#FIXME: is it appropriate to return .value?
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def __getitem__(self, attname_or_tuple):
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if type(attname_or_tuple) is _TupleType:
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return self._attrsNS[attname_or_tuple]
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else:
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return self._attrs[attname_or_tuple]
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# same as set
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def __setitem__(self, attname, value):
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if type(value) in _StringTypes:
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node = Attr(attname)
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node.value = value
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else:
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if not isinstance(value, Attr):
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raise TypeError, "value must be a string or Attr object"
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node = value
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self.setNamedItem(node)
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def setNamedItem(self, node):
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old = self._attrs.get(node.name)
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if old:
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old.unlink()
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self._attrs[node.name] = node
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self._attrsNS[(node.namespaceURI, node.localName)] = node
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return old
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def setNamedItemNS(self, node):
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return self.setNamedItem(node)
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def __delitem__(self, attname_or_tuple):
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node = self[attname_or_tuple]
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node.unlink()
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del self._attrs[node.name]
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del self._attrsNS[(node.namespaceURI, node.localName)]
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self.length = len(self._attrs)
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AttributeList = NamedNodeMap
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class Element(Node):
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nodeType = Node.ELEMENT_NODE
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nextSibling = None
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previousSibling = None
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childNodeTypes = (Node.ELEMENT_NODE, Node.PROCESSING_INSTRUCTION_NODE,
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Node.COMMENT_NODE, Node.TEXT_NODE,
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Node.CDATA_SECTION_NODE, Node.ENTITY_REFERENCE_NODE)
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def __init__(self, tagName, namespaceURI="", prefix="",
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localName=None):
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Node.__init__(self)
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self.tagName = self.nodeName = tagName
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self.localName = localName or tagName
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self.prefix = prefix
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self.namespaceURI = namespaceURI
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self.nodeValue = None
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self._attrs = {} # attributes are double-indexed:
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self._attrsNS = {} # tagName -> Attribute
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# URI,localName -> Attribute
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# in the future: consider lazy generation
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# of attribute objects this is too tricky
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# for now because of headaches with
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# namespaces.
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def cloneNode(self, deep):
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clone = Node.cloneNode(self, deep)
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clone._attrs = {}
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clone._attrsNS = {}
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for attr in self._attrs.values():
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node = attr.cloneNode(1)
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clone._attrs[node.name] = node
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clone._attrsNS[(node.namespaceURI, node.localName)] = node
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node.ownerElement = clone
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return clone
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def unlink(self):
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for attr in self._attrs.values():
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attr.unlink()
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self._attrs = None
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self._attrsNS = None
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Node.unlink(self)
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def getAttribute(self, attname):
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try:
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return self._attrs[attname].value
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except KeyError:
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return ""
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def getAttributeNS(self, namespaceURI, localName):
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try:
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return self._attrsNS[(namespaceURI, localName)].value
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except KeyError:
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return ""
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def setAttribute(self, attname, value):
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attr = Attr(attname)
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# for performance
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attr.__dict__["value"] = attr.__dict__["nodeValue"] = value
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self.setAttributeNode(attr)
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def setAttributeNS(self, namespaceURI, qualifiedName, value):
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prefix, localname = _nssplit(qualifiedName)
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# for performance
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attr = Attr(qualifiedName, namespaceURI, localname, prefix)
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attr.__dict__["value"] = attr.__dict__["nodeValue"] = value
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self.setAttributeNode(attr)
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def getAttributeNode(self, attrname):
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return self._attrs.get(attrname)
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def getAttributeNodeNS(self, namespaceURI, localName):
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return self._attrsNS.get((namespaceURI, localName))
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def setAttributeNode(self, attr):
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if attr.ownerElement not in (None, self):
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raise xml.dom.InuseAttributeErr("attribute node already owned")
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old = self._attrs.get(attr.name, None)
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if old:
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old.unlink()
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self._attrs[attr.name] = attr
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self._attrsNS[(attr.namespaceURI, attr.localName)] = attr
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# This creates a circular reference, but Element.unlink()
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# breaks the cycle since the references to the attribute
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# dictionaries are tossed.
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attr.ownerElement = self
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if old is not attr:
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# It might have already been part of this node, in which case
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# it doesn't represent a change, and should not be returned.
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return old
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def removeAttribute(self, name):
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attr = self._attrs[name]
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self.removeAttributeNode(attr)
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def removeAttributeNS(self, namespaceURI, localName):
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attr = self._attrsNS[(namespaceURI, localName)]
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self.removeAttributeNode(attr)
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def removeAttributeNode(self, node):
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node.unlink()
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del self._attrs[node.name]
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del self._attrsNS[(node.namespaceURI, node.localName)]
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def hasAttribute(self, name):
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return self._attrs.has_key(name)
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def hasAttributeNS(self, namespaceURI, localName):
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return self._attrsNS.has_key((namespaceURI, localName))
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def getElementsByTagName(self, name):
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return _getElementsByTagNameHelper(self, name, [])
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def getElementsByTagNameNS(self, namespaceURI, localName):
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_getElementsByTagNameNSHelper(self, namespaceURI, localName, [])
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def __repr__(self):
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return "<DOM Element: %s at %s>" % (self.tagName, id(self))
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def writexml(self, writer, indent="", addindent="", newl=""):
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# indent = current indentation
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# addindent = indentation to add to higher levels
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# newl = newline string
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writer.write(indent+"<" + self.tagName)
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attrs = self._get_attributes()
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a_names = attrs.keys()
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a_names.sort()
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for a_name in a_names:
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writer.write(" %s=\"" % a_name)
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_write_data(writer, attrs[a_name].value)
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writer.write("\"")
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if self.childNodes:
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writer.write(">%s"%(newl))
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for node in self.childNodes:
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node.writexml(writer,indent+addindent,addindent,newl)
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|
writer.write("%s</%s>%s" % (indent,self.tagName,newl))
|
|
else:
|
|
writer.write("/>%s"%(newl))
|
|
|
|
def _get_attributes(self):
|
|
return AttributeList(self._attrs, self._attrsNS)
|
|
|
|
def hasAttributes(self):
|
|
if self._attrs or self._attrsNS:
|
|
return 1
|
|
else:
|
|
return 0
|
|
|
|
class Comment(Node):
|
|
nodeType = Node.COMMENT_NODE
|
|
nodeName = "#comment"
|
|
attributes = None
|
|
childNodeTypes = ()
|
|
|
|
def __init__(self, data):
|
|
Node.__init__(self)
|
|
self.data = self.nodeValue = data
|
|
|
|
def writexml(self, writer, indent="", addindent="", newl=""):
|
|
writer.write("%s<!--%s-->%s" % (indent,self.data,newl))
|
|
|
|
class ProcessingInstruction(Node):
|
|
nodeType = Node.PROCESSING_INSTRUCTION_NODE
|
|
attributes = None
|
|
childNodeTypes = ()
|
|
|
|
def __init__(self, target, data):
|
|
Node.__init__(self)
|
|
self.target = self.nodeName = target
|
|
self.data = self.nodeValue = data
|
|
|
|
def writexml(self, writer, indent="", addindent="", newl=""):
|
|
writer.write("%s<?%s %s?>%s" % (indent,self.target, self.data, newl))
|
|
|
|
class Text(Node):
|
|
nodeType = Node.TEXT_NODE
|
|
nodeName = "#text"
|
|
attributes = None
|
|
childNodeTypes = ()
|
|
|
|
def __init__(self, data):
|
|
if type(data) not in _StringTypes:
|
|
raise TypeError, "node contents must be a string"
|
|
Node.__init__(self)
|
|
self.data = self.nodeValue = data
|
|
|
|
def __repr__(self):
|
|
if len(self.data) > 10:
|
|
dotdotdot = "..."
|
|
else:
|
|
dotdotdot = ""
|
|
return "<DOM Text node \"%s%s\">" % (self.data[0:10], dotdotdot)
|
|
|
|
def splitText(self, offset):
|
|
if offset < 0 or offset > len(self.data):
|
|
raise xml.dom.IndexSizeErr("illegal offset value")
|
|
newText = Text(self.data[offset:])
|
|
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))
|
|
|
|
def _nssplit(qualifiedName):
|
|
fields = _string.split(qualifiedName, ':', 1)
|
|
if len(fields) == 2:
|
|
return fields
|
|
elif len(fields) == 1:
|
|
return ('', fields[0])
|
|
|
|
|
|
class DocumentType(Node):
|
|
nodeType = Node.DOCUMENT_TYPE_NODE
|
|
nodeValue = None
|
|
attributes = None
|
|
name = None
|
|
publicId = None
|
|
systemId = None
|
|
internalSubset = ""
|
|
entities = None
|
|
notations = None
|
|
|
|
def __init__(self, qualifiedName):
|
|
Node.__init__(self)
|
|
if qualifiedName:
|
|
prefix, localname = _nssplit(qualifiedName)
|
|
self.name = localname
|
|
|
|
|
|
class DOMImplementation:
|
|
def hasFeature(self, feature, version):
|
|
if version not in ("1.0", "2.0"):
|
|
return 0
|
|
feature = _string.lower(feature)
|
|
return feature == "core"
|
|
|
|
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 = Document()
|
|
if doctype is None:
|
|
doctype = self.createDocumentType(qualifiedName, None, None)
|
|
if not qualifiedName:
|
|
# 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.
|
|
raise xml.dom.InvalidCharacterErr("Element with no name")
|
|
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)
|
|
doc.appendChild(element)
|
|
doctype.parentNode = 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
|
|
|
|
|
|
class Document(Node):
|
|
nodeType = Node.DOCUMENT_NODE
|
|
nodeName = "#document"
|
|
nodeValue = None
|
|
attributes = None
|
|
doctype = None
|
|
parentNode = None
|
|
|
|
implementation = DOMImplementation()
|
|
childNodeTypes = (Node.ELEMENT_NODE, Node.PROCESSING_INSTRUCTION_NODE,
|
|
Node.COMMENT_NODE, Node.DOCUMENT_TYPE_NODE)
|
|
|
|
def appendChild(self, node):
|
|
if node.nodeType not in self.childNodeTypes:
|
|
raise HierarchyRequestErr, \
|
|
"%s cannot be child of %s" % (repr(node), repr(self))
|
|
if node.parentNode is not None:
|
|
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):
|
|
self.childNodes.remove(oldChild)
|
|
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)
|
|
|
|
createElement = Element
|
|
|
|
createTextNode = Text
|
|
|
|
createComment = Comment
|
|
|
|
createProcessingInstruction = ProcessingInstruction
|
|
|
|
createAttribute = Attr
|
|
|
|
def createElementNS(self, namespaceURI, qualifiedName):
|
|
prefix, localName = _nssplit(qualifiedName)
|
|
return self.createElement(qualifiedName, namespaceURI,
|
|
prefix, localName)
|
|
|
|
def createAttributeNS(self, namespaceURI, qualifiedName):
|
|
prefix, localName = _nssplit(qualifiedName)
|
|
return self.createAttribute(qualifiedName, namespaceURI,
|
|
localName, prefix)
|
|
|
|
def getElementsByTagNameNS(self, namespaceURI, localName):
|
|
_getElementsByTagNameNSHelper(self, namespaceURI, localName)
|
|
|
|
def getElementsByTagName(self, name):
|
|
rc = []
|
|
_getElementsByTagNameHelper(self, name, rc)
|
|
return rc
|
|
|
|
def writexml(self, writer, indent="", addindent="", newl=""):
|
|
writer.write('<?xml version="1.0" ?>\n')
|
|
for node in self.childNodes:
|
|
node.writexml(writer, indent, addindent, newl)
|
|
|
|
def _get_StringIO():
|
|
# we can't use cStringIO since it doesn't support Unicode strings
|
|
from StringIO import StringIO
|
|
return StringIO()
|
|
|
|
def _doparse(func, args, kwargs):
|
|
events = apply(func, args, kwargs)
|
|
toktype, rootNode = events.getEvent()
|
|
events.expandNode(rootNode)
|
|
events.clear()
|
|
return rootNode
|
|
|
|
def parse(*args, **kwargs):
|
|
"""Parse a file into a DOM by filename or file object."""
|
|
from xml.dom import pulldom
|
|
return _doparse(pulldom.parse, args, kwargs)
|
|
|
|
def parseString(*args, **kwargs):
|
|
"""Parse a file into a DOM from a string."""
|
|
from xml.dom import pulldom
|
|
return _doparse(pulldom.parseString, args, kwargs)
|