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#
# ElementTree
# $Id: XMLTreeBuilder.py 2305 2005-03-01 17:43:09Z fredrik $
#
# an XML tree builder
#
# history:
# 2001-10-20 fl created
# 2002-05-01 fl added namespace support for xmllib
# 2002-07-27 fl require expat (1.5.2 code can use SimpleXMLTreeBuilder)
# 2002-08-17 fl use tag/attribute name memo cache
# 2002-12-04 fl moved XMLTreeBuilder to the ElementTree module
#
# Copyright (c) 1999-2004 by Fredrik Lundh. All rights reserved.
#
# fredrik@pythonware.com
# http://www.pythonware.com
#
# --------------------------------------------------------------------
# The ElementTree toolkit is
#
# Copyright (c) 1999-2004 by Fredrik Lundh
#
# By obtaining, using, and/or copying this software and/or its
# associated documentation, you agree that you have read, understood,
# and will comply with the following terms and conditions:
#
# Permission to use, copy, modify, and distribute this software and
# its associated documentation for any purpose and without fee is
# hereby granted, provided that the above copyright notice appears in
# all copies, and that both that copyright notice and this permission
# notice appear in supporting documentation, and that the name of
# Secret Labs AB or the author not be used in advertising or publicity
# pertaining to distribution of the software without specific, written
# prior permission.
#
# SECRET LABS AB AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
# TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANT-
# ABILITY AND FITNESS. IN NO EVENT SHALL SECRET LABS AB OR THE AUTHOR
# BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
# DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
# ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
# OF THIS SOFTWARE.
# --------------------------------------------------------------------
##
# Tools to build element trees from XML files.
##
import ElementTree
##
# (obsolete) ElementTree builder for XML source data, based on the
# <b>expat</b> parser.
# <p>
# This class is an alias for ElementTree.XMLTreeBuilder. New code
# should use that version instead.
#
# @see elementtree.ElementTree
class TreeBuilder(ElementTree.XMLTreeBuilder):
pass
##
# (experimental) An alternate builder that supports manipulation of
# new elements.
class FancyTreeBuilder(TreeBuilder):
def __init__(self, html=0):
TreeBuilder.__init__(self, html)
self._parser.StartNamespaceDeclHandler = self._start_ns
self._parser.EndNamespaceDeclHandler = self._end_ns
self.namespaces = []
def _start(self, tag, attrib_in):
elem = TreeBuilder._start(self, tag, attrib_in)
self.start(elem)
def _start_list(self, tag, attrib_in):
elem = TreeBuilder._start_list(self, tag, attrib_in)
self.start(elem)
def _end(self, tag):
elem = TreeBuilder._end(self, tag)
self.end(elem)
def _start_ns(self, prefix, value):
self.namespaces.insert(0, (prefix, value))
def _end_ns(self, prefix):
assert self.namespaces.pop(0)[0] == prefix, "implementation confused"
##
# Hook method that's called when a new element has been opened.
# May access the <b>namespaces</b> attribute.
#
# @param element The new element. The tag name and attributes are,
# set, but it has no children, and the text and tail attributes
# are still empty.
def start(self, element):
pass
##
# Hook method that's called when a new element has been closed.
# May access the <b>namespaces</b> attribute.
#
# @param element The new element.
def end(self, element):
pass
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