1 files changed, 105 insertions, 0 deletions
diff --git a/src/zope/tal/xmlparser.py b/src/zope/tal/xmlparser.py
new file mode 100644
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+++ b/src/zope/tal/xmlparser.py
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+##############################################################################
+#
+# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
+"""Generic Expat-based XML parser base class.
+
+This creates a parser with namespace processing enabled.
+
+$Id$
+"""
+import logging
+
+
+class XMLParser(object):
+
+    ordered_attributes = 0
+
+    handler_names = [
+        "StartElementHandler",
+        "EndElementHandler",
+        "ProcessingInstructionHandler",
+        "CharacterDataHandler",
+        "UnparsedEntityDeclHandler",
+        "NotationDeclHandler",
+        "StartNamespaceDeclHandler",
+        "EndNamespaceDeclHandler",
+        "CommentHandler",
+        "StartCdataSectionHandler",
+        "EndCdataSectionHandler",
+        "DefaultHandler",
+        "DefaultHandlerExpand",
+        "NotStandaloneHandler",
+        "ExternalEntityRefHandler",
+        "XmlDeclHandler",
+        "StartDoctypeDeclHandler",
+        "EndDoctypeDeclHandler",
+        "ElementDeclHandler",
+        "AttlistDeclHandler"
+        ]
+
+    def __init__(self, encoding=None):
+        self.parser = p = self.createParser(encoding)
+        if self.ordered_attributes:
+            try:
+                self.parser.ordered_attributes = self.ordered_attributes
+            except AttributeError:
+                logging.warn("TAL.XMLParser: Can't set ordered_attributes")
+                self.ordered_attributes = 0
+        for name in self.handler_names:
+            method = getattr(self, name, None)
+            if method is not None:
+                try:
+                    setattr(p, name, method)
+                except AttributeError:
+                    logging.error("TAL.XMLParser: Can't set "
+                                  "expat handler %s" % name)
+
+    def createParser(self, encoding=None):
+        global XMLParseError
+        from xml.parsers import expat
+        XMLParseError = expat.ExpatError
+        return expat.ParserCreate(encoding, ' ')
+
+    def parseFile(self, filename):
+        self.parseStream(open(filename))
+
+    def parseString(self, s):
+        if isinstance(s, unicode):
+            # Expat cannot deal with unicode strings, only with
+            # encoded ones.  Also, its range of encodings is rather
+            # limited, UTF-8 is the safest bet here.
+            s = s.encode('utf-8')
+        self.parser.Parse(s, 1)
+
+    def parseURL(self, url):
+        import urllib
+        self.parseStream(urllib.urlopen(url))
+
+    def parseStream(self, stream):
+        self.parser.ParseFile(stream)
+
+    def parseFragment(self, s, end=0):
+        self.parser.Parse(s, end)
+
+    def getpos(self):
+        # Apparently ErrorLineNumber and ErrorLineNumber contain the current
+        # position even when there was no error.  This contradicts the official
+        # documentation[1], but expat.h[2] contains the following definition:
+        #
+        #   /* For backwards compatibility with previous versions. */
+        #   #define XML_GetErrorLineNumber   XML_GetCurrentLineNumber
+        #
+        # [1] http://python.org/doc/current/lib/xmlparser-objects.html
+        # [2] http://cvs.sourceforge.net/viewcvs.py/expat/expat/lib/expat.h
+        return (self.parser.ErrorLineNumber, self.parser.ErrorColumnNumber)
+