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# $Header: /var/local/cvsroot/4Suite/Ft/Xml/Xslt/DomWriter.py,v 1.15 2005/03/28 09:04:20 mbrown Exp $
"""
DOM DocumentFragment writer for XSLT output
Much inspired by RtfWriter.
Copyright (c) 2000-2001 Alexandre Fayolle (France).
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation.
THIS PROGRAM IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
"""
from xml.dom import Node
from Ft.Xml import XMLNS_NAMESPACE, EMPTY_NAMESPACE
from Ft.Xml.Domlette import implementation
from Ft.Xml.Lib.XmlString import SplitQName
from Ft.Xml.Xslt import NullWriter
class DomWriter(NullWriter.NullWriter):
def __init__(self, ownerDoc=None, implementation=implementation, outputParams=None):
"""
Note: if no ownerDoc, there is no way to set the document's base URI.
"""
NullWriter.NullWriter.__init__(self)
if not ownerDoc:
ownerDoc = implementation.createDocument(None, None, None)
self._root = ownerDoc
else:
self._root = ownerDoc.createDocumentFragment()
self._ownerDoc = ownerDoc
self._nodeStack = [self._root]
self._currElement = None
self._currText = ''
return
def _completeTextNode(self):
if self._currText and len(self._nodeStack) and self._nodeStack[-1].nodeType != Node.DOCUMENT_NODE:
new_text = self._ownerDoc.createTextNode(self._currText)
self._nodeStack[-1].appendChild(new_text)
self._currText = ''
return
def getResult(self):
self._completeTextNode()
return self._root
def startElement(self, name, namespace=EMPTY_NAMESPACE, extraNss=None):
self._completeTextNode()
new_element = self._ownerDoc.createElementNS(namespace, name)
self._nodeStack.append(new_element)
extraNss = extraNss or {}
prefix, localName = SplitQName(name)
for prefix in extraNss.keys():
if prefix:
new_element.setAttributeNS(XMLNS_NAMESPACE,
'xmlns:'+prefix,
extraNss[prefix])
else:
new_element.setAttributeNS(XMLNS_NAMESPACE,
'xmlns',
extraNss[None] or u'')
return
def endElement(self, name, namespace=EMPTY_NAMESPACE):
self._completeTextNode()
new_element = self._nodeStack[-1]
del self._nodeStack[-1]
self._nodeStack[-1].appendChild(new_element)
return
def text(self, text, escapeOutput=True):
"""
The escapeOutput parameter is ignored
"""
#new_text = self._ownerDoc.createTextNode(text)
#self._nodeStack[-1].appendChild(new_text)
self._currText = self._currText + text
return
def attribute(self, name, value, namespace=EMPTY_NAMESPACE):
# Attributes can only occur in element scope for result trees
if self._nodeStack[-1].nodeType == Node.ELEMENT_NODE:
self._nodeStack[-1].setAttributeNS(namespace, name, value)
return
def processingInstruction(self, target, data):
self._completeTextNode()
pi = self._ownerDoc.createProcessingInstruction(target,data)
self._nodeStack[-1].appendChild(pi)
return
def comment(self, text):
self._completeTextNode()
comment = self._ownerDoc.createComment(text)
self._nodeStack[-1].appendChild(comment)
return
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