diff options
| author | Armin Rigo <arigo@tunes.org> | 2005-12-14 18:10:45 (GMT) |
|---|---|---|
| committer | Armin Rigo <arigo@tunes.org> | 2005-12-14 18:10:45 (GMT) |
| commit | 9ed730603112667b12cbbfb9c2af502e85bf06c4 (patch) | |
| tree | 643013647cf4a12824d6d88792e44cdbc38babb7 /Lib/xmlcore | |
| parent | 5c8cc2543bcea295bfd32530fb03bb48a3d1e4ad (diff) | |
| download | cpython-9ed730603112667b12cbbfb9c2af502e85bf06c4.zip cpython-9ed730603112667b12cbbfb9c2af502e85bf06c4.tar.gz cpython-9ed730603112667b12cbbfb9c2af502e85bf06c4.tar.bz2 | |
Subversion settings:
svn:ignore *.pyc *.pyo
svn:eol-style native
The .py files appear to have been checked in with Windows or inconsistent line
endings. The current check-in disrupts the 'svn blame', but hopefully it is
irrelevant for freshly imported code.
Diffstat (limited to 'Lib/xmlcore')
| -rw-r--r-- | Lib/xmlcore/etree/ElementInclude.py | 282 | ||||
| -rw-r--r-- | Lib/xmlcore/etree/ElementPath.py | 392 | ||||
| -rw-r--r-- | Lib/xmlcore/etree/ElementTree.py | 2508 | ||||
| -rw-r--r-- | Lib/xmlcore/etree/__init__.py | 60 |
4 files changed, 1621 insertions, 1621 deletions
diff --git a/Lib/xmlcore/etree/ElementInclude.py b/Lib/xmlcore/etree/ElementInclude.py index 5ee199a..bac2f5e 100644 --- a/Lib/xmlcore/etree/ElementInclude.py +++ b/Lib/xmlcore/etree/ElementInclude.py @@ -1,141 +1,141 @@ -#
-# ElementTree
-# $Id: ElementInclude.py 1862 2004-06-18 07:31:02Z Fredrik $
-#
-# limited xinclude support for element trees
-#
-# history:
-# 2003-08-15 fl created
-# 2003-11-14 fl fixed default loader
-#
-# Copyright (c) 2003-2004 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.
-# --------------------------------------------------------------------
-
-##
-# Limited XInclude support for the ElementTree package.
-##
-
-import copy
-import ElementTree
-
-XINCLUDE = "{http://www.w3.org/2001/XInclude}"
-
-XINCLUDE_INCLUDE = XINCLUDE + "include"
-XINCLUDE_FALLBACK = XINCLUDE + "fallback"
-
-##
-# Fatal include error.
-
-class FatalIncludeError(SyntaxError):
- pass
-
-##
-# Default loader. This loader reads an included resource from disk.
-#
-# @param href Resource reference.
-# @param parse Parse mode. Either "xml" or "text".
-# @param encoding Optional text encoding.
-# @return The expanded resource. If the parse mode is "xml", this
-# is an ElementTree instance. If the parse mode is "text", this
-# is a Unicode string. If the loader fails, it can return None
-# or raise an IOError exception.
-# @throws IOError If the loader fails to load the resource.
-
-def default_loader(href, parse, encoding=None):
- file = open(href)
- if parse == "xml":
- data = ElementTree.parse(file).getroot()
- else:
- data = file.read()
- if encoding:
- data = data.decode(encoding)
- file.close()
- return data
-
-##
-# Expand XInclude directives.
-#
-# @param elem Root element.
-# @param loader Optional resource loader. If omitted, it defaults
-# to {@link default_loader}. If given, it should be a callable
-# that implements the same interface as <b>default_loader</b>.
-# @throws FatalIncludeError If the function fails to include a given
-# resource, or if the tree contains malformed XInclude elements.
-# @throws IOError If the function fails to load a given resource.
-
-def include(elem, loader=None):
- if loader is None:
- loader = default_loader
- # look for xinclude elements
- i = 0
- while i < len(elem):
- e = elem[i]
- if e.tag == XINCLUDE_INCLUDE:
- # process xinclude directive
- href = e.get("href")
- parse = e.get("parse", "xml")
- if parse == "xml":
- node = loader(href, parse)
- if node is None:
- raise FatalIncludeError(
- "cannot load %r as %r" % (href, parse)
- )
- node = copy.copy(node)
- if e.tail:
- node.tail = (node.tail or "") + e.tail
- elem[i] = node
- elif parse == "text":
- text = loader(href, parse, e.get("encoding"))
- if text is None:
- raise FatalIncludeError(
- "cannot load %r as %r" % (href, parse)
- )
- if i:
- node = elem[i-1]
- node.tail = (node.tail or "") + text
- else:
- elem.text = (elem.text or "") + text + (e.tail or "")
- del elem[i]
- continue
- else:
- raise FatalIncludeError(
- "unknown parse type in xi:include tag (%r)" % parse
- )
- elif e.tag == XINCLUDE_FALLBACK:
- raise FatalIncludeError(
- "xi:fallback tag must be child of xi:include (%r)" % e.tag
- )
- else:
- include(e, loader)
- i = i + 1
-
+# +# ElementTree +# $Id: ElementInclude.py 1862 2004-06-18 07:31:02Z Fredrik $ +# +# limited xinclude support for element trees +# +# history: +# 2003-08-15 fl created +# 2003-11-14 fl fixed default loader +# +# Copyright (c) 2003-2004 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. +# -------------------------------------------------------------------- + +## +# Limited XInclude support for the ElementTree package. +## + +import copy +import ElementTree + +XINCLUDE = "{http://www.w3.org/2001/XInclude}" + +XINCLUDE_INCLUDE = XINCLUDE + "include" +XINCLUDE_FALLBACK = XINCLUDE + "fallback" + +## +# Fatal include error. + +class FatalIncludeError(SyntaxError): + pass + +## +# Default loader. This loader reads an included resource from disk. +# +# @param href Resource reference. +# @param parse Parse mode. Either "xml" or "text". +# @param encoding Optional text encoding. +# @return The expanded resource. If the parse mode is "xml", this +# is an ElementTree instance. If the parse mode is "text", this +# is a Unicode string. If the loader fails, it can return None +# or raise an IOError exception. +# @throws IOError If the loader fails to load the resource. + +def default_loader(href, parse, encoding=None): + file = open(href) + if parse == "xml": + data = ElementTree.parse(file).getroot() + else: + data = file.read() + if encoding: + data = data.decode(encoding) + file.close() + return data + +## +# Expand XInclude directives. +# +# @param elem Root element. +# @param loader Optional resource loader. If omitted, it defaults +# to {@link default_loader}. If given, it should be a callable +# that implements the same interface as <b>default_loader</b>. +# @throws FatalIncludeError If the function fails to include a given +# resource, or if the tree contains malformed XInclude elements. +# @throws IOError If the function fails to load a given resource. + +def include(elem, loader=None): + if loader is None: + loader = default_loader + # look for xinclude elements + i = 0 + while i < len(elem): + e = elem[i] + if e.tag == XINCLUDE_INCLUDE: + # process xinclude directive + href = e.get("href") + parse = e.get("parse", "xml") + if parse == "xml": + node = loader(href, parse) + if node is None: + raise FatalIncludeError( + "cannot load %r as %r" % (href, parse) + ) + node = copy.copy(node) + if e.tail: + node.tail = (node.tail or "") + e.tail + elem[i] = node + elif parse == "text": + text = loader(href, parse, e.get("encoding")) + if text is None: + raise FatalIncludeError( + "cannot load %r as %r" % (href, parse) + ) + if i: + node = elem[i-1] + node.tail = (node.tail or "") + text + else: + elem.text = (elem.text or "") + text + (e.tail or "") + del elem[i] + continue + else: + raise FatalIncludeError( + "unknown parse type in xi:include tag (%r)" % parse + ) + elif e.tag == XINCLUDE_FALLBACK: + raise FatalIncludeError( + "xi:fallback tag must be child of xi:include (%r)" % e.tag + ) + else: + include(e, loader) + i = i + 1 + diff --git a/Lib/xmlcore/etree/ElementPath.py b/Lib/xmlcore/etree/ElementPath.py index e8093c6..558b560 100644 --- a/Lib/xmlcore/etree/ElementPath.py +++ b/Lib/xmlcore/etree/ElementPath.py @@ -1,196 +1,196 @@ -#
-# ElementTree
-# $Id: ElementPath.py 1858 2004-06-17 21:31:41Z Fredrik $
-#
-# limited xpath support for element trees
-#
-# history:
-# 2003-05-23 fl created
-# 2003-05-28 fl added support for // etc
-# 2003-08-27 fl fixed parsing of periods in element names
-#
-# Copyright (c) 2003-2004 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.
-# --------------------------------------------------------------------
-
-##
-# Implementation module for XPath support. There's usually no reason
-# to import this module directly; the <b>ElementTree</b> does this for
-# you, if needed.
-##
-
-import re
-
-xpath_tokenizer = re.compile(
- "(::|\.\.|\(\)|[/.*:\[\]\(\)@=])|((?:\{[^}]+\})?[^/:\[\]\(\)@=\s]+)|\s+"
- ).findall
-
-class xpath_descendant_or_self:
- pass
-
-##
-# Wrapper for a compiled XPath.
-
-class Path:
-
- ##
- # Create an Path instance from an XPath expression.
-
- def __init__(self, path):
- tokens = xpath_tokenizer(path)
- # the current version supports 'path/path'-style expressions only
- self.path = []
- self.tag = None
- if tokens and tokens[0][0] == "/":
- raise SyntaxError("cannot use absolute path on element")
- while tokens:
- op, tag = tokens.pop(0)
- if tag or op == "*":
- self.path.append(tag or op)
- elif op == ".":
- pass
- elif op == "/":
- self.path.append(xpath_descendant_or_self())
- continue
- else:
- raise SyntaxError("unsupported path syntax (%s)" % op)
- if tokens:
- op, tag = tokens.pop(0)
- if op != "/":
- raise SyntaxError(
- "expected path separator (%s)" % (op or tag)
- )
- if self.path and isinstance(self.path[-1], xpath_descendant_or_self):
- raise SyntaxError("path cannot end with //")
- if len(self.path) == 1 and isinstance(self.path[0], type("")):
- self.tag = self.path[0]
-
- ##
- # Find first matching object.
-
- def find(self, element):
- tag = self.tag
- if tag is None:
- nodeset = self.findall(element)
- if not nodeset:
- return None
- return nodeset[0]
- for elem in element:
- if elem.tag == tag:
- return elem
- return None
-
- ##
- # Find text for first matching object.
-
- def findtext(self, element, default=None):
- tag = self.tag
- if tag is None:
- nodeset = self.findall(element)
- if not nodeset:
- return default
- return nodeset[0].text or ""
- for elem in element:
- if elem.tag == tag:
- return elem.text or ""
- return default
-
- ##
- # Find all matching objects.
-
- def findall(self, element):
- nodeset = [element]
- index = 0
- while 1:
- try:
- path = self.path[index]
- index = index + 1
- except IndexError:
- return nodeset
- set = []
- if isinstance(path, xpath_descendant_or_self):
- try:
- tag = self.path[index]
- if not isinstance(tag, type("")):
- tag = None
- else:
- index = index + 1
- except IndexError:
- tag = None # invalid path
- for node in nodeset:
- new = list(node.getiterator(tag))
- if new and new[0] is node:
- set.extend(new[1:])
- else:
- set.extend(new)
- else:
- for node in nodeset:
- for node in node:
- if path == "*" or node.tag == path:
- set.append(node)
- if not set:
- return []
- nodeset = set
-
-_cache = {}
-
-##
-# (Internal) Compile path.
-
-def _compile(path):
- p = _cache.get(path)
- if p is not None:
- return p
- p = Path(path)
- if len(_cache) >= 100:
- _cache.clear()
- _cache[path] = p
- return p
-
-##
-# Find first matching object.
-
-def find(element, path):
- return _compile(path).find(element)
-
-##
-# Find text for first matching object.
-
-def findtext(element, path, default=None):
- return _compile(path).findtext(element, default)
-
-##
-# Find all matching objects.
-
-def findall(element, path):
- return _compile(path).findall(element)
-
+# +# ElementTree +# $Id: ElementPath.py 1858 2004-06-17 21:31:41Z Fredrik $ +# +# limited xpath support for element trees +# +# history: +# 2003-05-23 fl created +# 2003-05-28 fl added support for // etc +# 2003-08-27 fl fixed parsing of periods in element names +# +# Copyright (c) 2003-2004 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. +# -------------------------------------------------------------------- + +## +# Implementation module for XPath support. There's usually no reason +# to import this module directly; the <b>ElementTree</b> does this for +# you, if needed. +## + +import re + +xpath_tokenizer = re.compile( + "(::|\.\.|\(\)|[/.*:\[\]\(\)@=])|((?:\{[^}]+\})?[^/:\[\]\(\)@=\s]+)|\s+" + ).findall + +class xpath_descendant_or_self: + pass + +## +# Wrapper for a compiled XPath. + +class Path: + + ## + # Create an Path instance from an XPath expression. + + def __init__(self, path): + tokens = xpath_tokenizer(path) + # the current version supports 'path/path'-style expressions only + self.path = [] + self.tag = None + if tokens and tokens[0][0] == "/": + raise SyntaxError("cannot use absolute path on element") + while tokens: + op, tag = tokens.pop(0) + if tag or op == "*": + self.path.append(tag or op) + elif op == ".": + pass + elif op == "/": + self.path.append(xpath_descendant_or_self()) + continue + else: + raise SyntaxError("unsupported path syntax (%s)" % op) + if tokens: + op, tag = tokens.pop(0) + if op != "/": + raise SyntaxError( + "expected path separator (%s)" % (op or tag) + ) + if self.path and isinstance(self.path[-1], xpath_descendant_or_self): + raise SyntaxError("path cannot end with //") + if len(self.path) == 1 and isinstance(self.path[0], type("")): + self.tag = self.path[0] + + ## + # Find first matching object. + + def find(self, element): + tag = self.tag + if tag is None: + nodeset = self.findall(element) + if not nodeset: + return None + return nodeset[0] + for elem in element: + if elem.tag == tag: + return elem + return None + + ## + # Find text for first matching object. + + def findtext(self, element, default=None): + tag = self.tag + if tag is None: + nodeset = self.findall(element) + if not nodeset: + return default + return nodeset[0].text or "" + for elem in element: + if elem.tag == tag: + return elem.text or "" + return default + + ## + # Find all matching objects. + + def findall(self, element): + nodeset = [element] + index = 0 + while 1: + try: + path = self.path[index] + index = index + 1 + except IndexError: + return nodeset + set = [] + if isinstance(path, xpath_descendant_or_self): + try: + tag = self.path[index] + if not isinstance(tag, type("")): + tag = None + else: + index = index + 1 + except IndexError: + tag = None # invalid path + for node in nodeset: + new = list(node.getiterator(tag)) + if new and new[0] is node: + set.extend(new[1:]) + else: + set.extend(new) + else: + for node in nodeset: + for node in node: + if path == "*" or node.tag == path: + set.append(node) + if not set: + return [] + nodeset = set + +_cache = {} + +## +# (Internal) Compile path. + +def _compile(path): + p = _cache.get(path) + if p is not None: + return p + p = Path(path) + if len(_cache) >= 100: + _cache.clear() + _cache[path] = p + return p + +## +# Find first matching object. + +def find(element, path): + return _compile(path).find(element) + +## +# Find text for first matching object. + +def findtext(element, path, default=None): + return _compile(path).findtext(element, default) + +## +# Find all matching objects. + +def findall(element, path): + return _compile(path).findall(element) + diff --git a/Lib/xmlcore/etree/ElementTree.py b/Lib/xmlcore/etree/ElementTree.py index c18f7ff..23c2058 100644 --- a/Lib/xmlcore/etree/ElementTree.py +++ b/Lib/xmlcore/etree/ElementTree.py @@ -1,1254 +1,1254 @@ -#
-# ElementTree
-# $Id: ElementTree.py 2326 2005-03-17 07:45:21Z fredrik $
-#
-# light-weight XML support for Python 1.5.2 and later.
-#
-# history:
-# 2001-10-20 fl created (from various sources)
-# 2001-11-01 fl return root from parse method
-# 2002-02-16 fl sort attributes in lexical order
-# 2002-04-06 fl TreeBuilder refactoring, added PythonDoc markup
-# 2002-05-01 fl finished TreeBuilder refactoring
-# 2002-07-14 fl added basic namespace support to ElementTree.write
-# 2002-07-25 fl added QName attribute support
-# 2002-10-20 fl fixed encoding in write
-# 2002-11-24 fl changed default encoding to ascii; fixed attribute encoding
-# 2002-11-27 fl accept file objects or file names for parse/write
-# 2002-12-04 fl moved XMLTreeBuilder back to this module
-# 2003-01-11 fl fixed entity encoding glitch for us-ascii
-# 2003-02-13 fl added XML literal factory
-# 2003-02-21 fl added ProcessingInstruction/PI factory
-# 2003-05-11 fl added tostring/fromstring helpers
-# 2003-05-26 fl added ElementPath support
-# 2003-07-05 fl added makeelement factory method
-# 2003-07-28 fl added more well-known namespace prefixes
-# 2003-08-15 fl fixed typo in ElementTree.findtext (Thomas Dartsch)
-# 2003-09-04 fl fall back on emulator if ElementPath is not installed
-# 2003-10-31 fl markup updates
-# 2003-11-15 fl fixed nested namespace bug
-# 2004-03-28 fl added XMLID helper
-# 2004-06-02 fl added default support to findtext
-# 2004-06-08 fl fixed encoding of non-ascii element/attribute names
-# 2004-08-23 fl take advantage of post-2.1 expat features
-# 2005-02-01 fl added iterparse implementation
-# 2005-03-02 fl fixed iterparse support for pre-2.2 versions
-#
-# Copyright (c) 1999-2005 by Fredrik Lundh. All rights reserved.
-#
-# fredrik@pythonware.com
-# http://www.pythonware.com
-#
-# --------------------------------------------------------------------
-# The ElementTree toolkit is
-#
-# Copyright (c) 1999-2005 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.
-# --------------------------------------------------------------------
-
-__all__ = [
- # public symbols
- "Comment",
- "dump",
- "Element", "ElementTree",
- "fromstring",
- "iselement", "iterparse",
- "parse",
- "PI", "ProcessingInstruction",
- "QName",
- "SubElement",
- "tostring",
- "TreeBuilder",
- "VERSION", "XML",
- "XMLTreeBuilder",
- ]
-
-##
-# The <b>Element</b> type is a flexible container object, designed to
-# store hierarchical data structures in memory. The type can be
-# described as a cross between a list and a dictionary.
-# <p>
-# Each element has a number of properties associated with it:
-# <ul>
-# <li>a <i>tag</i>. This is a string identifying what kind of data
-# this element represents (the element type, in other words).</li>
-# <li>a number of <i>attributes</i>, stored in a Python dictionary.</li>
-# <li>a <i>text</i> string.</li>
-# <li>an optional <i>tail</i> string.</li>
-# <li>a number of <i>child elements</i>, stored in a Python sequence</li>
-# </ul>
-#
-# To create an element instance, use the {@link #Element} or {@link
-# #SubElement} factory functions.
-# <p>
-# The {@link #ElementTree} class can be used to wrap an element
-# structure, and convert it from and to XML.
-##
-
-import string, sys, re
-
-class _SimpleElementPath:
- # emulate pre-1.2 find/findtext/findall behaviour
- def find(self, element, tag):
- for elem in element:
- if elem.tag == tag:
- return elem
- return None
- def findtext(self, element, tag, default=None):
- for elem in element:
- if elem.tag == tag:
- return elem.text or ""
- return default
- def findall(self, element, tag):
- if tag[:3] == ".//":
- return element.getiterator(tag[3:])
- result = []
- for elem in element:
- if elem.tag == tag:
- result.append(elem)
- return result
-
-try:
- import ElementPath
-except ImportError:
- # FIXME: issue warning in this case?
- ElementPath = _SimpleElementPath()
-
-# TODO: add support for custom namespace resolvers/default namespaces
-# TODO: add improved support for incremental parsing
-
-VERSION = "1.2.6"
-
-##
-# Internal element class. This class defines the Element interface,
-# and provides a reference implementation of this interface.
-# <p>
-# You should not create instances of this class directly. Use the
-# appropriate factory functions instead, such as {@link #Element}
-# and {@link #SubElement}.
-#
-# @see Element
-# @see SubElement
-# @see Comment
-# @see ProcessingInstruction
-
-class _ElementInterface:
- # <tag attrib>text<child/>...</tag>tail
-
- ##
- # (Attribute) Element tag.
-
- tag = None
-
- ##
- # (Attribute) Element attribute dictionary. Where possible, use
- # {@link #_ElementInterface.get},
- # {@link #_ElementInterface.set},
- # {@link #_ElementInterface.keys}, and
- # {@link #_ElementInterface.items} to access
- # element attributes.
-
- attrib = None
-
- ##
- # (Attribute) Text before first subelement. This is either a
- # string or the value None, if there was no text.
-
- text = None
-
- ##
- # (Attribute) Text after this element's end tag, but before the
- # next sibling element's start tag. This is either a string or
- # the value None, if there was no text.
-
- tail = None # text after end tag, if any
-
- def __init__(self, tag, attrib):
- self.tag = tag
- self.attrib = attrib
- self._children = []
-
- def __repr__(self):
- return "<Element %s at %x>" % (self.tag, id(self))
-
- ##
- # Creates a new element object of the same type as this element.
- #
- # @param tag Element tag.
- # @param attrib Element attributes, given as a dictionary.
- # @return A new element instance.
-
- def makeelement(self, tag, attrib):
- return Element(tag, attrib)
-
- ##
- # Returns the number of subelements.
- #
- # @return The number of subelements.
-
- def __len__(self):
- return len(self._children)
-
- ##
- # Returns the given subelement.
- #
- # @param index What subelement to return.
- # @return The given subelement.
- # @exception IndexError If the given element does not exist.
-
- def __getitem__(self, index):
- return self._children[index]
-
- ##
- # Replaces the given subelement.
- #
- # @param index What subelement to replace.
- # @param element The new element value.
- # @exception IndexError If the given element does not exist.
- # @exception AssertionError If element is not a valid object.
-
- def __setitem__(self, index, element):
- assert iselement(element)
- self._children[index] = element
-
- ##
- # Deletes the given subelement.
- #
- # @param index What subelement to delete.
- # @exception IndexError If the given element does not exist.
-
- def __delitem__(self, index):
- del self._children[index]
-
- ##
- # Returns a list containing subelements in the given range.
- #
- # @param start The first subelement to return.
- # @param stop The first subelement that shouldn't be returned.
- # @return A sequence object containing subelements.
-
- def __getslice__(self, start, stop):
- return self._children[start:stop]
-
- ##
- # Replaces a number of subelements with elements from a sequence.
- #
- # @param start The first subelement to replace.
- # @param stop The first subelement that shouldn't be replaced.
- # @param elements A sequence object with zero or more elements.
- # @exception AssertionError If a sequence member is not a valid object.
-
- def __setslice__(self, start, stop, elements):
- for element in elements:
- assert iselement(element)
- self._children[start:stop] = list(elements)
-
- ##
- # Deletes a number of subelements.
- #
- # @param start The first subelement to delete.
- # @param stop The first subelement to leave in there.
-
- def __delslice__(self, start, stop):
- del self._children[start:stop]
-
- ##
- # Adds a subelement to the end of this element.
- #
- # @param element The element to add.
- # @exception AssertionError If a sequence member is not a valid object.
-
- def append(self, element):
- assert iselement(element)
- self._children.append(element)
-
- ##
- # Inserts a subelement at the given position in this element.
- #
- # @param index Where to insert the new subelement.
- # @exception AssertionError If the element is not a valid object.
-
- def insert(self, index, element):
- assert iselement(element)
- self._children.insert(index, element)
-
- ##
- # Removes a matching subelement. Unlike the <b>find</b> methods,
- # this method compares elements based on identity, not on tag
- # value or contents.
- #
- # @param element What element to remove.
- # @exception ValueError If a matching element could not be found.
- # @exception AssertionError If the element is not a valid object.
-
- def remove(self, element):
- assert iselement(element)
- self._children.remove(element)
-
- ##
- # Returns all subelements. The elements are returned in document
- # order.
- #
- # @return A list of subelements.
- # @defreturn list of Element instances
-
- def getchildren(self):
- return self._children
-
- ##
- # Finds the first matching subelement, by tag name or path.
- #
- # @param path What element to look for.
- # @return The first matching element, or None if no element was found.
- # @defreturn Element or None
-
- def find(self, path):
- return ElementPath.find(self, path)
-
- ##
- # Finds text for the first matching subelement, by tag name or path.
- #
- # @param path What element to look for.
- # @param default What to return if the element was not found.
- # @return The text content of the first matching element, or the
- # default value no element was found. Note that if the element
- # has is found, but has no text content, this method returns an
- # empty string.
- # @defreturn string
-
- def findtext(self, path, default=None):
- return ElementPath.findtext(self, path, default)
-
- ##
- # Finds all matching subelements, by tag name or path.
- #
- # @param path What element to look for.
- # @return A list or iterator containing all matching elements,
- # in document order.
- # @defreturn list of Element instances
-
- def findall(self, path):
- return ElementPath.findall(self, path)
-
- ##
- # Resets an element. This function removes all subelements, clears
- # all attributes, and sets the text and tail attributes to None.
-
- def clear(self):
- self.attrib.clear()
- self._children = []
- self.text = self.tail = None
-
- ##
- # Gets an element attribute.
- #
- # @param key What attribute to look for.
- # @param default What to return if the attribute was not found.
- # @return The attribute value, or the default value, if the
- # attribute was not found.
- # @defreturn string or None
-
- def get(self, key, default=None):
- return self.attrib.get(key, default)
-
- ##
- # Sets an element attribute.
- #
- # @param key What attribute to set.
- # @param value The attribute value.
-
- def set(self, key, value):
- self.attrib[key] = value
-
- ##
- # Gets a list of attribute names. The names are returned in an
- # arbitrary order (just like for an ordinary Python dictionary).
- #
- # @return A list of element attribute names.
- # @defreturn list of strings
-
- def keys(self):
- return self.attrib.keys()
-
- ##
- # Gets element attributes, as a sequence. The attributes are
- # returned in an arbitrary order.
- #
- # @return A list of (name, value) tuples for all attributes.
- # @defreturn list of (string, string) tuples
-
- def items(self):
- return self.attrib.items()
-
- ##
- # Creates a tree iterator. The iterator loops over this element
- # and all subelements, in document order, and returns all elements
- # with a matching tag.
- # <p>
- # If the tree structure is modified during iteration, the result
- # is undefined.
- #
- # @param tag What tags to look for (default is to return all elements).
- # @return A list or iterator containing all the matching elements.
- # @defreturn list or iterator
-
- def getiterator(self, tag=None):
- nodes = []
- if tag == "*":
- tag = None
- if tag is None or self.tag == tag:
- nodes.append(self)
- for node in self._children:
- nodes.extend(node.getiterator(tag))
- return nodes
-
-# compatibility
-_Element = _ElementInterface
-
-##
-# Element factory. This function returns an object implementing the
-# standard Element interface. The exact class or type of that object
-# is implementation dependent, but it will always be compatible with
-# the {@link #_ElementInterface} class in this module.
-# <p>
-# The element name, attribute names, and attribute values can be
-# either 8-bit ASCII strings or Unicode strings.
-#
-# @param tag The element name.
-# @param attrib An optional dictionary, containing element attributes.
-# @param **extra Additional attributes, given as keyword arguments.
-# @return An element instance.
-# @defreturn Element
-
-def Element(tag, attrib={}, **extra):
- attrib = attrib.copy()
- attrib.update(extra)
- return _ElementInterface(tag, attrib)
-
-##
-# Subelement factory. This function creates an element instance, and
-# appends it to an existing element.
-# <p>
-# The element name, attribute names, and attribute values can be
-# either 8-bit ASCII strings or Unicode strings.
-#
-# @param parent The parent element.
-# @param tag The subelement name.
-# @param attrib An optional dictionary, containing element attributes.
-# @param **extra Additional attributes, given as keyword arguments.
-# @return An element instance.
-# @defreturn Element
-
-def SubElement(parent, tag, attrib={}, **extra):
- attrib = attrib.copy()
- attrib.update(extra)
- element = parent.makeelement(tag, attrib)
- parent.append(element)
- return element
-
-##
-# Comment element factory. This factory function creates a special
-# element that will be serialized as an XML comment.
-# <p>
-# The comment string can be either an 8-bit ASCII string or a Unicode
-# string.
-#
-# @param text A string containing the comment string.
-# @return An element instance, representing a comment.
-# @defreturn Element
-
-def Comment(text=None):
- element = Element(Comment)
- element.text = text
- return element
-
-##
-# PI element factory. This factory function creates a special element
-# that will be serialized as an XML processing instruction.
-#
-# @param target A string containing the PI target.
-# @param text A string containing the PI contents, if any.
-# @return An element instance, representing a PI.
-# @defreturn Element
-
-def ProcessingInstruction(target, text=None):
- element = Element(ProcessingInstruction)
- element.text = target
- if text:
- element.text = element.text + " " + text
- return element
-
-PI = ProcessingInstruction
-
-##
-# QName wrapper. This can be used to wrap a QName attribute value, in
-# order to get proper namespace handling on output.
-#
-# @param text A string containing the QName value, in the form {uri}local,
-# or, if the tag argument is given, the URI part of a QName.
-# @param tag Optional tag. If given, the first argument is interpreted as
-# an URI, and this argument is interpreted as a local name.
-# @return An opaque object, representing the QName.
-
-class QName:
- def __init__(self, text_or_uri, tag=None):
- if tag:
- text_or_uri = "{%s}%s" % (text_or_uri, tag)
- self.text = text_or_uri
- def __str__(self):
- return self.text
- def __hash__(self):
- return hash(self.text)
- def __cmp__(self, other):
- if isinstance(other, QName):
- return cmp(self.text, other.text)
- return cmp(self.text, other)
-
-##
-# ElementTree wrapper class. This class represents an entire element
-# hierarchy, and adds some extra support for serialization to and from
-# standard XML.
-#
-# @param element Optional root element.
-# @keyparam file Optional file handle or name. If given, the
-# tree is initialized with the contents of this XML file.
-
-class ElementTree:
-
- def __init__(self, element=None, file=None):
- assert element is None or iselement(element)
- self._root = element # first node
- if file:
- self.parse(file)
-
- ##
- # Gets the root element for this tree.
- #
- # @return An element instance.
- # @defreturn Element
-
- def getroot(self):
- return self._root
-
- ##
- # Replaces the root element for this tree. This discards the
- # current contents of the tree, and replaces it with the given
- # element. Use with care.
- #
- # @param element An element instance.
-
- def _setroot(self, element):
- assert iselement(element)
- self._root = element
-
- ##
- # Loads an external XML document into this element tree.
- #
- # @param source A file name or file object.
- # @param parser An optional parser instance. If not given, the
- # standard {@link XMLTreeBuilder} parser is used.
- # @return The document root element.
- # @defreturn Element
-
- def parse(self, source, parser=None):
- if not hasattr(source, "read"):
- source = open(source, "rb")
- if not parser:
- parser = XMLTreeBuilder()
- while 1:
- data = source.read(32768)
- if not data:
- break
- parser.feed(data)
- self._root = parser.close()
- return self._root
-
- ##
- # Creates a tree iterator for the root element. The iterator loops
- # over all elements in this tree, in document order.
- #
- # @param tag What tags to look for (default is to return all elements)
- # @return An iterator.
- # @defreturn iterator
-
- def getiterator(self, tag=None):
- assert self._root is not None
- return self._root.getiterator(tag)
-
- ##
- # Finds the first toplevel element with given tag.
- # Same as getroot().find(path).
- #
- # @param path What element to look for.
- # @return The first matching element, or None if no element was found.
- # @defreturn Element or None
-
- def find(self, path):
- assert self._root is not None
- if path[:1] == "/":
- path = "." + path
- return self._root.find(path)
-
- ##
- # Finds the element text for the first toplevel element with given
- # tag. Same as getroot().findtext(path).
- #
- # @param path What toplevel element to look for.
- # @param default What to return if the element was not found.
- # @return The text content of the first matching element, or the
- # default value no element was found. Note that if the element
- # has is found, but has no text content, this method returns an
- # empty string.
- # @defreturn string
-
- def findtext(self, path, default=None):
- assert self._root is not None
- if path[:1] == "/":
- path = "." + path
- return self._root.findtext(path, default)
-
- ##
- # Finds all toplevel elements with the given tag.
- # Same as getroot().findall(path).
- #
- # @param path What element to look for.
- # @return A list or iterator containing all matching elements,
- # in document order.
- # @defreturn list of Element instances
-
- def findall(self, path):
- assert self._root is not None
- if path[:1] == "/":
- path = "." + path
- return self._root.findall(path)
-
- ##
- # Writes the element tree to a file, as XML.
- #
- # @param file A file name, or a file object opened for writing.
- # @param encoding Optional output encoding (default is US-ASCII).
-
- def write(self, file, encoding="us-ascii"):
- assert self._root is not None
- if not hasattr(file, "write"):
- file = open(file, "wb")
- if not encoding:
- encoding = "us-ascii"
- elif encoding != "utf-8" and encoding != "us-ascii":
- file.write("<?xml version='1.0' encoding='%s'?>\n" % encoding)
- self._write(file, self._root, encoding, {})
-
- def _write(self, file, node, encoding, namespaces):
- # write XML to file
- tag = node.tag
- if tag is Comment:
- file.write("<!-- %s -->" % _escape_cdata(node.text, encoding))
- elif tag is ProcessingInstruction:
- file.write("<?%s?>" % _escape_cdata(node.text, encoding))
- else:
- items = node.items()
- xmlns_items = [] # new namespaces in this scope
- try:
- if isinstance(tag, QName) or tag[:1] == "{":
- tag, xmlns = fixtag(tag, namespaces)
- if xmlns: xmlns_items.append(xmlns)
- except TypeError:
- _raise_serialization_error(tag)
- file.write("<" + _encode(tag, encoding))
- if items or xmlns_items:
- items.sort() # lexical order
- for k, v in items:
- try:
- if isinstance(k, QName) or k[:1] == "{":
- k, xmlns = fixtag(k, namespaces)
- if xmlns: xmlns_items.append(xmlns)
- except TypeError:
- _raise_serialization_error(k)
- try:
- if isinstance(v, QName):
- v, xmlns = fixtag(v, namespaces)
- if xmlns: xmlns_items.append(xmlns)
- except TypeError:
- _raise_serialization_error(v)
- file.write(" %s=\"%s\"" % (_encode(k, encoding),
- _escape_attrib(v, encoding)))
- for k, v in xmlns_items:
- file.write(" %s=\"%s\"" % (_encode(k, encoding),
- _escape_attrib(v, encoding)))
- if node.text or len(node):
- file.write(">")
- if node.text:
- file.write(_escape_cdata(node.text, encoding))
- for n in node:
- self._write(file, n, encoding, namespaces)
- file.write("</" + _encode(tag, encoding) + ">")
- else:
- file.write(" />")
- for k, v in xmlns_items:
- del namespaces[v]
- if node.tail:
- file.write(_escape_cdata(node.tail, encoding))
-
-# --------------------------------------------------------------------
-# helpers
-
-##
-# Checks if an object appears to be a valid element object.
-#
-# @param An element instance.
-# @return A true value if this is an element object.
-# @defreturn flag
-
-def iselement(element):
- # FIXME: not sure about this; might be a better idea to look
- # for tag/attrib/text attributes
- return isinstance(element, _ElementInterface) or hasattr(element, "tag")
-
-##
-# Writes an element tree or element structure to sys.stdout. This
-# function should be used for debugging only.
-# <p>
-# The exact output format is implementation dependent. In this
-# version, it's written as an ordinary XML file.
-#
-# @param elem An element tree or an individual element.
-
-def dump(elem):
- # debugging
- if not isinstance(elem, ElementTree):
- elem = ElementTree(elem)
- elem.write(sys.stdout)
- tail = elem.getroot().tail
- if not tail or tail[-1] != "\n":
- sys.stdout.write("\n")
-
-def _encode(s, encoding):
- try:
- return s.encode(encoding)
- except AttributeError:
- return s # 1.5.2: assume the string uses the right encoding
-
-if sys.version[:3] == "1.5":
- _escape = re.compile(r"[&<>\"\x80-\xff]+") # 1.5.2
-else:
- _escape = re.compile(eval(r'u"[&<>\"\u0080-\uffff]+"'))
-
-_escape_map = {
- "&": "&",
- "<": "<",
- ">": ">",
- '"': """,
-}
-
-_namespace_map = {
- # "well-known" namespace prefixes
- "http://www.w3.org/XML/1998/namespace": "xml",
- "http://www.w3.org/1999/xhtml": "html",
- "http://www.w3.org/1999/02/22-rdf-syntax-ns#": "rdf",
- "http://schemas.xmlsoap.org/wsdl/": "wsdl",
-}
-
-def _raise_serialization_error(text):
- raise TypeError(
- "cannot serialize %r (type %s)" % (text, type(text).__name__)
- )
-
-def _encode_entity(text, pattern=_escape):
- # map reserved and non-ascii characters to numerical entities
- def escape_entities(m, map=_escape_map):
- out = []
- append = out.append
- for char in m.group():
- text = map.get(char)
- if text is None:
- text = "&#%d;" % ord(char)
- append(text)
- return string.join(out, "")
- try:
- return _encode(pattern.sub(escape_entities, text), "ascii")
- except TypeError:
- _raise_serialization_error(text)
-
-#
-# the following functions assume an ascii-compatible encoding
-# (or "utf-16")
-
-def _escape_cdata(text, encoding=None, replace=string.replace):
- # escape character data
- try:
- if encoding:
- try:
- text = _encode(text, encoding)
- except UnicodeError:
- return _encode_entity(text)
- text = replace(text, "&", "&")
- text = replace(text, "<", "<")
- text = replace(text, ">", ">")
- return text
- except (TypeError, AttributeError):
- _raise_serialization_error(text)
-
-def _escape_attrib(text, encoding=None, replace=string.replace):
- # escape attribute value
- try:
- if encoding:
- try:
- text = _encode(text, encoding)
- except UnicodeError:
- return _encode_entity(text)
- text = replace(text, "&", "&")
- text = replace(text, "'", "'") # FIXME: overkill
- text = replace(text, "\"", """)
- text = replace(text, "<", "<")
- text = replace(text, ">", ">")
- return text
- except (TypeError, AttributeError):
- _raise_serialization_error(text)
-
-def fixtag(tag, namespaces):
- # given a decorated tag (of the form {uri}tag), return prefixed
- # tag and namespace declaration, if any
- if isinstance(tag, QName):
- tag = tag.text
- namespace_uri, tag = string.split(tag[1:], "}", 1)
- prefix = namespaces.get(namespace_uri)
- if prefix is None:
- prefix = _namespace_map.get(namespace_uri)
- if prefix is None:
- prefix = "ns%d" % len(namespaces)
- namespaces[namespace_uri] = prefix
- if prefix == "xml":
- xmlns = None
- else:
- xmlns = ("xmlns:%s" % prefix, namespace_uri)
- else:
- xmlns = None
- return "%s:%s" % (prefix, tag), xmlns
-
-##
-# Parses an XML document into an element tree.
-#
-# @param source A filename or file object containing XML data.
-# @param parser An optional parser instance. If not given, the
-# standard {@link XMLTreeBuilder} parser is used.
-# @return An ElementTree instance
-
-def parse(source, parser=None):
- tree = ElementTree()
- tree.parse(source, parser)
- return tree
-
-##
-# Parses an XML document into an element tree incrementally, and reports
-# what's going on to the user.
-#
-# @param source A filename or file object containing XML data.
-# @param events A list of events to report back. If omitted, only "end"
-# events are reported.
-# @return A (event, elem) iterator.
-
-class iterparse:
-
- def __init__(self, source, events=None):
- if not hasattr(source, "read"):
- source = open(source, "rb")
- self._file = source
- self._events = []
- self._index = 0
- self.root = self._root = None
- self._parser = XMLTreeBuilder()
- # wire up the parser for event reporting
- parser = self._parser._parser
- append = self._events.append
- if events is None:
- events = ["end"]
- for event in events:
- if event == "start":
- try:
- parser.ordered_attributes = 1
- parser.specified_attributes = 1
- def handler(tag, attrib_in, event=event, append=append,
- start=self._parser._start_list):
- append((event, start(tag, attrib_in)))
- parser.StartElementHandler = handler
- except AttributeError:
- def handler(tag, attrib_in, event=event, append=append,
- start=self._parser._start):
- append((event, start(tag, attrib_in)))
- parser.StartElementHandler = handler
- elif event == "end":
- def handler(tag, event=event, append=append,
- end=self._parser._end):
- append((event, end(tag)))
- parser.EndElementHandler = handler
- elif event == "start-ns":
- def handler(prefix, uri, event=event, append=append):
- try:
- uri = _encode(uri, "ascii")
- except UnicodeError:
- pass
- append((event, (prefix or "", uri)))
- parser.StartNamespaceDeclHandler = handler
- elif event == "end-ns":
- def handler(prefix, event=event, append=append):
- append((event, None))
- parser.EndNamespaceDeclHandler = handler
-
- def next(self):
- while 1:
- try:
- item = self._events[self._index]
- except IndexError:
- if self._parser is None:
- self.root = self._root
- try:
- raise StopIteration
- except NameError:
- raise IndexError
- # load event buffer
- del self._events[:]
- self._index = 0
- data = self._file.read(16384)
- if data:
- self._parser.feed(data)
- else:
- self._root = self._parser.close()
- self._parser = None
- else:
- self._index = self._index + 1
- return item
-
- try:
- iter
- def __iter__(self):
- return self
- except NameError:
- def __getitem__(self, index):
- return self.next()
-
-##
-# Parses an XML document from a string constant. This function can
-# be used to embed "XML literals" in Python code.
-#
-# @param source A string containing XML data.
-# @return An Element instance.
-# @defreturn Element
-
-def XML(text):
- parser = XMLTreeBuilder()
- parser.feed(text)
- return parser.close()
-
-##
-# Parses an XML document from a string constant, and also returns
-# a dictionary which maps from element id:s to elements.
-#
-# @param source A string containing XML data.
-# @return A tuple containing an Element instance and a dictionary.
-# @defreturn (Element, dictionary)
-
-def XMLID(text):
- parser = XMLTreeBuilder()
- parser.feed(text)
- tree = parser.close()
- ids = {}
- for elem in tree.getiterator():
- id = elem.get("id")
- if id:
- ids[id] = elem
- return tree, ids
-
-##
-# Parses an XML document from a string constant. Same as {@link #XML}.
-#
-# @def fromstring(text)
-# @param source A string containing XML data.
-# @return An Element instance.
-# @defreturn Element
-
-fromstring = XML
-
-##
-# Generates a string representation of an XML element, including all
-# subelements.
-#
-# @param element An Element instance.
-# @return An encoded string containing the XML data.
-# @defreturn string
-
-def tostring(element, encoding=None):
- class dummy:
- pass
- data = []
- file = dummy()
- file.write = data.append
- ElementTree(element).write(file, encoding)
- return string.join(data, "")
-
-##
-# Generic element structure builder. This builder converts a sequence
-# of {@link #TreeBuilder.start}, {@link #TreeBuilder.data}, and {@link
-# #TreeBuilder.end} method calls to a well-formed element structure.
-# <p>
-# You can use this class to build an element structure using a custom XML
-# parser, or a parser for some other XML-like format.
-#
-# @param element_factory Optional element factory. This factory
-# is called to create new Element instances, as necessary.
-
-class TreeBuilder:
-
- def __init__(self, element_factory=None):
- self._data = [] # data collector
- self._elem = [] # element stack
- self._last = None # last element
- self._tail = None # true if we're after an end tag
- if element_factory is None:
- element_factory = _ElementInterface
- self._factory = element_factory
-
- ##
- # Flushes the parser buffers, and returns the toplevel documen
- # element.
- #
- # @return An Element instance.
- # @defreturn Element
-
- def close(self):
- assert len(self._elem) == 0, "missing end tags"
- assert self._last != None, "missing toplevel element"
- return self._last
-
- def _flush(self):
- if self._data:
- if self._last is not None:
- text = string.join(self._data, "")
- if self._tail:
- assert self._last.tail is None, "internal error (tail)"
- self._last.tail = text
- else:
- assert self._last.text is None, "internal error (text)"
- self._last.text = text
- self._data = []
-
- ##
- # Adds text to the current element.
- #
- # @param data A string. This should be either an 8-bit string
- # containing ASCII text, or a Unicode string.
-
- def data(self, data):
- self._data.append(data)
-
- ##
- # Opens a new element.
- #
- # @param tag The element name.
- # @param attrib A dictionary containing element attributes.
- # @return The opened element.
- # @defreturn Element
-
- def start(self, tag, attrs):
- self._flush()
- self._last = elem = self._factory(tag, attrs)
- if self._elem:
- self._elem[-1].append(elem)
- self._elem.append(elem)
- self._tail = 0
- return elem
-
- ##
- # Closes the current element.
- #
- # @param tag The element name.
- # @return The closed element.
- # @defreturn Element
-
- def end(self, tag):
- self._flush()
- self._last = self._elem.pop()
- assert self._last.tag == tag,\
- "end tag mismatch (expected %s, got %s)" % (
- self._last.tag, tag)
- self._tail = 1
- return self._last
-
-##
-# Element structure builder for XML source data, based on the
-# <b>expat</b> parser.
-#
-# @keyparam target Target object. If omitted, the builder uses an
-# instance of the standard {@link #TreeBuilder} class.
-# @keyparam html Predefine HTML entities. This flag is not supported
-# by the current implementation.
-# @see #ElementTree
-# @see #TreeBuilder
-
-class XMLTreeBuilder:
-
- def __init__(self, html=0, target=None):
- try:
- from xmlcore.parsers import expat
- except ImportError:
- raise ImportError(
- "No module named expat; use SimpleXMLTreeBuilder instead"
- )
- self._parser = parser = expat.ParserCreate(None, "}")
- if target is None:
- target = TreeBuilder()
- self._target = target
- self._names = {} # name memo cache
- # callbacks
- parser.DefaultHandlerExpand = self._default
- parser.StartElementHandler = self._start
- parser.EndElementHandler = self._end
- parser.CharacterDataHandler = self._data
- # let expat do the buffering, if supported
- try:
- self._parser.buffer_text = 1
- except AttributeError:
- pass
- # use new-style attribute handling, if supported
- try:
- self._parser.ordered_attributes = 1
- self._parser.specified_attributes = 1
- parser.StartElementHandler = self._start_list
- except AttributeError:
- pass
- encoding = None
- if not parser.returns_unicode:
- encoding = "utf-8"
- # target.xml(encoding, None)
- self._doctype = None
- self.entity = {}
-
- def _fixtext(self, text):
- # convert text string to ascii, if possible
- try:
- return _encode(text, "ascii")
- except UnicodeError:
- return text
-
- def _fixname(self, key):
- # expand qname, and convert name string to ascii, if possible
- try:
- name = self._names[key]
- except KeyError:
- name = key
- if "}" in name:
- name = "{" + name
- self._names[key] = name = self._fixtext(name)
- return name
-
- def _start(self, tag, attrib_in):
- fixname = self._fixname
- tag = fixname(tag)
- attrib = {}
- for key, value in attrib_in.items():
- attrib[fixname(key)] = self._fixtext(value)
- return self._target.start(tag, attrib)
-
- def _start_list(self, tag, attrib_in):
- fixname = self._fixname
- tag = fixname(tag)
- attrib = {}
- if attrib_in:
- for i in range(0, len(attrib_in), 2):
- attrib[fixname(attrib_in[i])] = self._fixtext(attrib_in[i+1])
- return self._target.start(tag, attrib)
-
- def _data(self, text):
- return self._target.data(self._fixtext(text))
-
- def _end(self, tag):
- return self._target.end(self._fixname(tag))
-
- def _default(self, text):
- prefix = text[:1]
- if prefix == "&":
- # deal with undefined entities
- try:
- self._target.data(self.entity[text[1:-1]])
- except KeyError:
- from xmlcore.parsers import expat
- raise expat.error(
- "undefined entity %s: line %d, column %d" %
- (text, self._parser.ErrorLineNumber,
- self._parser.ErrorColumnNumber)
- )
- elif prefix == "<" and text[:9] == "<!DOCTYPE":
- self._doctype = [] # inside a doctype declaration
- elif self._doctype is not None:
- # parse doctype contents
- if prefix == ">":
- self._doctype = None
- return
- text = string.strip(text)
- if not text:
- return
- self._doctype.append(text)
- n = len(self._doctype)
- if n > 2:
- type = self._doctype[1]
- if type == "PUBLIC" and n == 4:
- name, type, pubid, system = self._doctype
- elif type == "SYSTEM" and n == 3:
- name, type, system = self._doctype
- pubid = None
- else:
- return
- if pubid:
- pubid = pubid[1:-1]
- self.doctype(name, pubid, system[1:-1])
- self._doctype = None
-
- ##
- # Handles a doctype declaration.
- #
- # @param name Doctype name.
- # @param pubid Public identifier.
- # @param system System identifier.
-
- def doctype(self, name, pubid, system):
- pass
-
- ##
- # Feeds data to the parser.
- #
- # @param data Encoded data.
-
- def feed(self, data):
- self._parser.Parse(data, 0)
-
- ##
- # Finishes feeding data to the parser.
- #
- # @return An element structure.
- # @defreturn Element
-
- def close(self):
- self._parser.Parse("", 1) # end of data
- tree = self._target.close()
- del self._target, self._parser # get rid of circular references
- return tree
+# +# ElementTree +# $Id: ElementTree.py 2326 2005-03-17 07:45:21Z fredrik $ +# +# light-weight XML support for Python 1.5.2 and later. +# +# history: +# 2001-10-20 fl created (from various sources) +# 2001-11-01 fl return root from parse method +# 2002-02-16 fl sort attributes in lexical order +# 2002-04-06 fl TreeBuilder refactoring, added PythonDoc markup +# 2002-05-01 fl finished TreeBuilder refactoring +# 2002-07-14 fl added basic namespace support to ElementTree.write +# 2002-07-25 fl added QName attribute support +# 2002-10-20 fl fixed encoding in write +# 2002-11-24 fl changed default encoding to ascii; fixed attribute encoding +# 2002-11-27 fl accept file objects or file names for parse/write +# 2002-12-04 fl moved XMLTreeBuilder back to this module +# 2003-01-11 fl fixed entity encoding glitch for us-ascii +# 2003-02-13 fl added XML literal factory +# 2003-02-21 fl added ProcessingInstruction/PI factory +# 2003-05-11 fl added tostring/fromstring helpers +# 2003-05-26 fl added ElementPath support +# 2003-07-05 fl added makeelement factory method +# 2003-07-28 fl added more well-known namespace prefixes +# 2003-08-15 fl fixed typo in ElementTree.findtext (Thomas Dartsch) +# 2003-09-04 fl fall back on emulator if ElementPath is not installed +# 2003-10-31 fl markup updates +# 2003-11-15 fl fixed nested namespace bug +# 2004-03-28 fl added XMLID helper +# 2004-06-02 fl added default support to findtext +# 2004-06-08 fl fixed encoding of non-ascii element/attribute names +# 2004-08-23 fl take advantage of post-2.1 expat features +# 2005-02-01 fl added iterparse implementation +# 2005-03-02 fl fixed iterparse support for pre-2.2 versions +# +# Copyright (c) 1999-2005 by Fredrik Lundh. All rights reserved. +# +# fredrik@pythonware.com +# http://www.pythonware.com +# +# -------------------------------------------------------------------- +# The ElementTree toolkit is +# +# Copyright (c) 1999-2005 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. +# -------------------------------------------------------------------- + +__all__ = [ + # public symbols + "Comment", + "dump", + "Element", "ElementTree", + "fromstring", + "iselement", "iterparse", + "parse", + "PI", "ProcessingInstruction", + "QName", + "SubElement", + "tostring", + "TreeBuilder", + "VERSION", "XML", + "XMLTreeBuilder", + ] + +## +# The <b>Element</b> type is a flexible container object, designed to +# store hierarchical data structures in memory. The type can be +# described as a cross between a list and a dictionary. +# <p> +# Each element has a number of properties associated with it: +# <ul> +# <li>a <i>tag</i>. This is a string identifying what kind of data +# this element represents (the element type, in other words).</li> +# <li>a number of <i>attributes</i>, stored in a Python dictionary.</li> +# <li>a <i>text</i> string.</li> +# <li>an optional <i>tail</i> string.</li> +# <li>a number of <i>child elements</i>, stored in a Python sequence</li> +# </ul> +# +# To create an element instance, use the {@link #Element} or {@link +# #SubElement} factory functions. +# <p> +# The {@link #ElementTree} class can be used to wrap an element +# structure, and convert it from and to XML. +## + +import string, sys, re + +class _SimpleElementPath: + # emulate pre-1.2 find/findtext/findall behaviour + def find(self, element, tag): + for elem in element: + if elem.tag == tag: + return elem + return None + def findtext(self, element, tag, default=None): + for elem in element: + if elem.tag == tag: + return elem.text or "" + return default + def findall(self, element, tag): + if tag[:3] == ".//": + return element.getiterator(tag[3:]) + result = [] + for elem in element: + if elem.tag == tag: + result.append(elem) + return result + +try: + import ElementPath +except ImportError: + # FIXME: issue warning in this case? + ElementPath = _SimpleElementPath() + +# TODO: add support for custom namespace resolvers/default namespaces +# TODO: add improved support for incremental parsing + +VERSION = "1.2.6" + +## +# Internal element class. This class defines the Element interface, +# and provides a reference implementation of this interface. +# <p> +# You should not create instances of this class directly. Use the +# appropriate factory functions instead, such as {@link #Element} +# and {@link #SubElement}. +# +# @see Element +# @see SubElement +# @see Comment +# @see ProcessingInstruction + +class _ElementInterface: + # <tag attrib>text<child/>...</tag>tail + + ## + # (Attribute) Element tag. + + tag = None + + ## + # (Attribute) Element attribute dictionary. Where possible, use + # {@link #_ElementInterface.get}, + # {@link #_ElementInterface.set}, + # {@link #_ElementInterface.keys}, and + # {@link #_ElementInterface.items} to access + # element attributes. + + attrib = None + + ## + # (Attribute) Text before first subelement. This is either a + # string or the value None, if there was no text. + + text = None + + ## + # (Attribute) Text after this element's end tag, but before the + # next sibling element's start tag. This is either a string or + # the value None, if there was no text. + + tail = None # text after end tag, if any + + def __init__(self, tag, attrib): + self.tag = tag + self.attrib = attrib + self._children = [] + + def __repr__(self): + return "<Element %s at %x>" % (self.tag, id(self)) + + ## + # Creates a new element object of the same type as this element. + # + # @param tag Element tag. + # @param attrib Element attributes, given as a dictionary. + # @return A new element instance. + + def makeelement(self, tag, attrib): + return Element(tag, attrib) + + ## + # Returns the number of subelements. + # + # @return The number of subelements. + + def __len__(self): + return len(self._children) + + ## + # Returns the given subelement. + # + # @param index What subelement to return. + # @return The given subelement. + # @exception IndexError If the given element does not exist. + + def __getitem__(self, index): + return self._children[index] + + ## + # Replaces the given subelement. + # + # @param index What subelement to replace. + # @param element The new element value. + # @exception IndexError If the given element does not exist. + # @exception AssertionError If element is not a valid object. + + def __setitem__(self, index, element): + assert iselement(element) + self._children[index] = element + + ## + # Deletes the given subelement. + # + # @param index What subelement to delete. + # @exception IndexError If the given element does not exist. + + def __delitem__(self, index): + del self._children[index] + + ## + # Returns a list containing subelements in the given range. + # + # @param start The first subelement to return. + # @param stop The first subelement that shouldn't be returned. + # @return A sequence object containing subelements. + + def __getslice__(self, start, stop): + return self._children[start:stop] + + ## + # Replaces a number of subelements with elements from a sequence. + # + # @param start The first subelement to replace. + # @param stop The first subelement that shouldn't be replaced. + # @param elements A sequence object with zero or more elements. + # @exception AssertionError If a sequence member is not a valid object. + + def __setslice__(self, start, stop, elements): + for element in elements: + assert iselement(element) + self._children[start:stop] = list(elements) + + ## + # Deletes a number of subelements. + # + # @param start The first subelement to delete. + # @param stop The first subelement to leave in there. + + def __delslice__(self, start, stop): + del self._children[start:stop] + + ## + # Adds a subelement to the end of this element. + # + # @param element The element to add. + # @exception AssertionError If a sequence member is not a valid object. + + def append(self, element): + assert iselement(element) + self._children.append(element) + + ## + # Inserts a subelement at the given position in this element. + # + # @param index Where to insert the new subelement. + # @exception AssertionError If the element is not a valid object. + + def insert(self, index, element): + assert iselement(element) + self._children.insert(index, element) + + ## + # Removes a matching subelement. Unlike the <b>find</b> methods, + # this method compares elements based on identity, not on tag + # value or contents. + # + # @param element What element to remove. + # @exception ValueError If a matching element could not be found. + # @exception AssertionError If the element is not a valid object. + + def remove(self, element): + assert iselement(element) + self._children.remove(element) + + ## + # Returns all subelements. The elements are returned in document + # order. + # + # @return A list of subelements. + # @defreturn list of Element instances + + def getchildren(self): + return self._children + + ## + # Finds the first matching subelement, by tag name or path. + # + # @param path What element to look for. + # @return The first matching element, or None if no element was found. + # @defreturn Element or None + + def find(self, path): + return ElementPath.find(self, path) + + ## + # Finds text for the first matching subelement, by tag name or path. + # + # @param path What element to look for. + # @param default What to return if the element was not found. + # @return The text content of the first matching element, or the + # default value no element was found. Note that if the element + # has is found, but has no text content, this method returns an + # empty string. + # @defreturn string + + def findtext(self, path, default=None): + return ElementPath.findtext(self, path, default) + + ## + # Finds all matching subelements, by tag name or path. + # + # @param path What element to look for. + # @return A list or iterator containing all matching elements, + # in document order. + # @defreturn list of Element instances + + def findall(self, path): + return ElementPath.findall(self, path) + + ## + # Resets an element. This function removes all subelements, clears + # all attributes, and sets the text and tail attributes to None. + + def clear(self): + self.attrib.clear() + self._children = [] + self.text = self.tail = None + + ## + # Gets an element attribute. + # + # @param key What attribute to look for. + # @param default What to return if the attribute was not found. + # @return The attribute value, or the default value, if the + # attribute was not found. + # @defreturn string or None + + def get(self, key, default=None): + return self.attrib.get(key, default) + + ## + # Sets an element attribute. + # + # @param key What attribute to set. + # @param value The attribute value. + + def set(self, key, value): + self.attrib[key] = value + + ## + # Gets a list of attribute names. The names are returned in an + # arbitrary order (just like for an ordinary Python dictionary). + # + # @return A list of element attribute names. + # @defreturn list of strings + + def keys(self): + return self.attrib.keys() + + ## + # Gets element attributes, as a sequence. The attributes are + # returned in an arbitrary order. + # + # @return A list of (name, value) tuples for all attributes. + # @defreturn list of (string, string) tuples + + def items(self): + return self.attrib.items() + + ## + # Creates a tree iterator. The iterator loops over this element + # and all subelements, in document order, and returns all elements + # with a matching tag. + # <p> + # If the tree structure is modified during iteration, the result + # is undefined. + # + # @param tag What tags to look for (default is to return all elements). + # @return A list or iterator containing all the matching elements. + # @defreturn list or iterator + + def getiterator(self, tag=None): + nodes = [] + if tag == "*": + tag = None + if tag is None or self.tag == tag: + nodes.append(self) + for node in self._children: + nodes.extend(node.getiterator(tag)) + return nodes + +# compatibility +_Element = _ElementInterface + +## +# Element factory. This function returns an object implementing the +# standard Element interface. The exact class or type of that object +# is implementation dependent, but it will always be compatible with +# the {@link #_ElementInterface} class in this module. +# <p> +# The element name, attribute names, and attribute values can be +# either 8-bit ASCII strings or Unicode strings. +# +# @param tag The element name. +# @param attrib An optional dictionary, containing element attributes. +# @param **extra Additional attributes, given as keyword arguments. +# @return An element instance. +# @defreturn Element + +def Element(tag, attrib={}, **extra): + attrib = attrib.copy() + attrib.update(extra) + return _ElementInterface(tag, attrib) + +## +# Subelement factory. This function creates an element instance, and +# appends it to an existing element. +# <p> +# The element name, attribute names, and attribute values can be +# either 8-bit ASCII strings or Unicode strings. +# +# @param parent The parent element. +# @param tag The subelement name. +# @param attrib An optional dictionary, containing element attributes. +# @param **extra Additional attributes, given as keyword arguments. +# @return An element instance. +# @defreturn Element + +def SubElement(parent, tag, attrib={}, **extra): + attrib = attrib.copy() + attrib.update(extra) + element = parent.makeelement(tag, attrib) + parent.append(element) + return element + +## +# Comment element factory. This factory function creates a special +# element that will be serialized as an XML comment. +# <p> +# The comment string can be either an 8-bit ASCII string or a Unicode +# string. +# +# @param text A string containing the comment string. +# @return An element instance, representing a comment. +# @defreturn Element + +def Comment(text=None): + element = Element(Comment) + element.text = text + return element + +## +# PI element factory. This factory function creates a special element +# that will be serialized as an XML processing instruction. +# +# @param target A string containing the PI target. +# @param text A string containing the PI contents, if any. +# @return An element instance, representing a PI. +# @defreturn Element + +def ProcessingInstruction(target, text=None): + element = Element(ProcessingInstruction) + element.text = target + if text: + element.text = element.text + " " + text + return element + +PI = ProcessingInstruction + +## +# QName wrapper. This can be used to wrap a QName attribute value, in +# order to get proper namespace handling on output. +# +# @param text A string containing the QName value, in the form {uri}local, +# or, if the tag argument is given, the URI part of a QName. +# @param tag Optional tag. If given, the first argument is interpreted as +# an URI, and this argument is interpreted as a local name. +# @return An opaque object, representing the QName. + +class QName: + def __init__(self, text_or_uri, tag=None): + if tag: + text_or_uri = "{%s}%s" % (text_or_uri, tag) + self.text = text_or_uri + def __str__(self): + return self.text + def __hash__(self): + return hash(self.text) + def __cmp__(self, other): + if isinstance(other, QName): + return cmp(self.text, other.text) + return cmp(self.text, other) + +## +# ElementTree wrapper class. This class represents an entire element +# hierarchy, and adds some extra support for serialization to and from +# standard XML. +# +# @param element Optional root element. +# @keyparam file Optional file handle or name. If given, the +# tree is initialized with the contents of this XML file. + +class ElementTree: + + def __init__(self, element=None, file=None): + assert element is None or iselement(element) + self._root = element # first node + if file: + self.parse(file) + + ## + # Gets the root element for this tree. + # + # @return An element instance. + # @defreturn Element + + def getroot(self): + return self._root + + ## + # Replaces the root element for this tree. This discards the + # current contents of the tree, and replaces it with the given + # element. Use with care. + # + # @param element An element instance. + + def _setroot(self, element): + assert iselement(element) + self._root = element + + ## + # Loads an external XML document into this element tree. + # + # @param source A file name or file object. + # @param parser An optional parser instance. If not given, the + # standard {@link XMLTreeBuilder} parser is used. + # @return The document root element. + # @defreturn Element + + def parse(self, source, parser=None): + if not hasattr(source, "read"): + source = open(source, "rb") + if not parser: + parser = XMLTreeBuilder() + while 1: + data = source.read(32768) + if not data: + break + parser.feed(data) + self._root = parser.close() + return self._root + + ## + # Creates a tree iterator for the root element. The iterator loops + # over all elements in this tree, in document order. + # + # @param tag What tags to look for (default is to return all elements) + # @return An iterator. + # @defreturn iterator + + def getiterator(self, tag=None): + assert self._root is not None + return self._root.getiterator(tag) + + ## + # Finds the first toplevel element with given tag. + # Same as getroot().find(path). + # + # @param path What element to look for. + # @return The first matching element, or None if no element was found. + # @defreturn Element or None + + def find(self, path): + assert self._root is not None + if path[:1] == "/": + path = "." + path + return self._root.find(path) + + ## + # Finds the element text for the first toplevel element with given + # tag. Same as getroot().findtext(path). + # + # @param path What toplevel element to look for. + # @param default What to return if the element was not found. + # @return The text content of the first matching element, or the + # default value no element was found. Note that if the element + # has is found, but has no text content, this method returns an + # empty string. + # @defreturn string + + def findtext(self, path, default=None): + assert self._root is not None + if path[:1] == "/": + path = "." + path + return self._root.findtext(path, default) + + ## + # Finds all toplevel elements with the given tag. + # Same as getroot().findall(path). + # + # @param path What element to look for. + # @return A list or iterator containing all matching elements, + # in document order. + # @defreturn list of Element instances + + def findall(self, path): + assert self._root is not None + if path[:1] == "/": + path = "." + path + return self._root.findall(path) + + ## + # Writes the element tree to a file, as XML. + # + # @param file A file name, or a file object opened for writing. + # @param encoding Optional output encoding (default is US-ASCII). + + def write(self, file, encoding="us-ascii"): + assert self._root is not None + if not hasattr(file, "write"): + file = open(file, "wb") + if not encoding: + encoding = "us-ascii" + elif encoding != "utf-8" and encoding != "us-ascii": + file.write("<?xml version='1.0' encoding='%s'?>\n" % encoding) + self._write(file, self._root, encoding, {}) + + def _write(self, file, node, encoding, namespaces): + # write XML to file + tag = node.tag + if tag is Comment: + file.write("<!-- %s -->" % _escape_cdata(node.text, encoding)) + elif tag is ProcessingInstruction: + file.write("<?%s?>" % _escape_cdata(node.text, encoding)) + else: + items = node.items() + xmlns_items = [] # new namespaces in this scope + try: + if isinstance(tag, QName) or tag[:1] == "{": + tag, xmlns = fixtag(tag, namespaces) + if xmlns: xmlns_items.append(xmlns) + except TypeError: + _raise_serialization_error(tag) + file.write("<" + _encode(tag, encoding)) + if items or xmlns_items: + items.sort() # lexical order + for k, v in items: + try: + if isinstance(k, QName) or k[:1] == "{": + k, xmlns = fixtag(k, namespaces) + if xmlns: xmlns_items.append(xmlns) + except TypeError: + _raise_serialization_error(k) + try: + if isinstance(v, QName): + v, xmlns = fixtag(v, namespaces) + if xmlns: xmlns_items.append(xmlns) + except TypeError: + _raise_serialization_error(v) + file.write(" %s=\"%s\"" % (_encode(k, encoding), + _escape_attrib(v, encoding))) + for k, v in xmlns_items: + file.write(" %s=\"%s\"" % (_encode(k, encoding), + _escape_attrib(v, encoding))) + if node.text or len(node): + file.write(">") + if node.text: + file.write(_escape_cdata(node.text, encoding)) + for n in node: + self._write(file, n, encoding, namespaces) + file.write("</" + _encode(tag, encoding) + ">") + else: + file.write(" />") + for k, v in xmlns_items: + del namespaces[v] + if node.tail: + file.write(_escape_cdata(node.tail, encoding)) + +# -------------------------------------------------------------------- +# helpers + +## +# Checks if an object appears to be a valid element object. +# +# @param An element instance. +# @return A true value if this is an element object. +# @defreturn flag + +def iselement(element): + # FIXME: not sure about this; might be a better idea to look + # for tag/attrib/text attributes + return isinstance(element, _ElementInterface) or hasattr(element, "tag") + +## +# Writes an element tree or element structure to sys.stdout. This +# function should be used for debugging only. +# <p> +# The exact output format is implementation dependent. In this +# version, it's written as an ordinary XML file. +# +# @param elem An element tree or an individual element. + +def dump(elem): + # debugging + if not isinstance(elem, ElementTree): + elem = ElementTree(elem) + elem.write(sys.stdout) + tail = elem.getroot().tail + if not tail or tail[-1] != "\n": + sys.stdout.write("\n") + +def _encode(s, encoding): + try: + return s.encode(encoding) + except AttributeError: + return s # 1.5.2: assume the string uses the right encoding + +if sys.version[:3] == "1.5": + _escape = re.compile(r"[&<>\"\x80-\xff]+") # 1.5.2 +else: + _escape = re.compile(eval(r'u"[&<>\"\u0080-\uffff]+"')) + +_escape_map = { + "&": "&", + "<": "<", + ">": ">", + '"': """, +} + +_namespace_map = { + # "well-known" namespace prefixes + "http://www.w3.org/XML/1998/namespace": "xml", + "http://www.w3.org/1999/xhtml": "html", + "http://www.w3.org/1999/02/22-rdf-syntax-ns#": "rdf", + "http://schemas.xmlsoap.org/wsdl/": "wsdl", +} + +def _raise_serialization_error(text): + raise TypeError( + "cannot serialize %r (type %s)" % (text, type(text).__name__) + ) + +def _encode_entity(text, pattern=_escape): + # map reserved and non-ascii characters to numerical entities + def escape_entities(m, map=_escape_map): + out = [] + append = out.append + for char in m.group(): + text = map.get(char) + if text is None: + text = "&#%d;" % ord(char) + append(text) + return string.join(out, "") + try: + return _encode(pattern.sub(escape_entities, text), "ascii") + except TypeError: + _raise_serialization_error(text) + +# +# the following functions assume an ascii-compatible encoding +# (or "utf-16") + +def _escape_cdata(text, encoding=None, replace=string.replace): + # escape character data + try: + if encoding: + try: + text = _encode(text, encoding) + except UnicodeError: + return _encode_entity(text) + text = replace(text, "&", "&") + text = replace(text, "<", "<") + text = replace(text, ">", ">") + return text + except (TypeError, AttributeError): + _raise_serialization_error(text) + +def _escape_attrib(text, encoding=None, replace=string.replace): + # escape attribute value + try: + if encoding: + try: + text = _encode(text, encoding) + except UnicodeError: + return _encode_entity(text) + text = replace(text, "&", "&") + text = replace(text, "'", "'") # FIXME: overkill + text = replace(text, "\"", """) + text = replace(text, "<", "<") + text = replace(text, ">", ">") + return text + except (TypeError, AttributeError): + _raise_serialization_error(text) + +def fixtag(tag, namespaces): + # given a decorated tag (of the form {uri}tag), return prefixed + # tag and namespace declaration, if any + if isinstance(tag, QName): + tag = tag.text + namespace_uri, tag = string.split(tag[1:], "}", 1) + prefix = namespaces.get(namespace_uri) + if prefix is None: + prefix = _namespace_map.get(namespace_uri) + if prefix is None: + prefix = "ns%d" % len(namespaces) + namespaces[namespace_uri] = prefix + if prefix == "xml": + xmlns = None + else: + xmlns = ("xmlns:%s" % prefix, namespace_uri) + else: + xmlns = None + return "%s:%s" % (prefix, tag), xmlns + +## +# Parses an XML document into an element tree. +# +# @param source A filename or file object containing XML data. +# @param parser An optional parser instance. If not given, the +# standard {@link XMLTreeBuilder} parser is used. +# @return An ElementTree instance + +def parse(source, parser=None): + tree = ElementTree() + tree.parse(source, parser) + return tree + +## +# Parses an XML document into an element tree incrementally, and reports +# what's going on to the user. +# +# @param source A filename or file object containing XML data. +# @param events A list of events to report back. If omitted, only "end" +# events are reported. +# @return A (event, elem) iterator. + +class iterparse: + + def __init__(self, source, events=None): + if not hasattr(source, "read"): + source = open(source, "rb") + self._file = source + self._events = [] + self._index = 0 + self.root = self._root = None + self._parser = XMLTreeBuilder() + # wire up the parser for event reporting + parser = self._parser._parser + append = self._events.append + if events is None: + events = ["end"] + for event in events: + if event == "start": + try: + parser.ordered_attributes = 1 + parser.specified_attributes = 1 + def handler(tag, attrib_in, event=event, append=append, + start=self._parser._start_list): + append((event, start(tag, attrib_in))) + parser.StartElementHandler = handler + except AttributeError: + def handler(tag, attrib_in, event=event, append=append, + start=self._parser._start): + append((event, start(tag, attrib_in))) + parser.StartElementHandler = handler + elif event == "end": + def handler(tag, event=event, append=append, + end=self._parser._end): + append((event, end(tag))) + parser.EndElementHandler = handler + elif event == "start-ns": + def handler(prefix, uri, event=event, append=append): + try: + uri = _encode(uri, "ascii") + except UnicodeError: + pass + append((event, (prefix or "", uri))) + parser.StartNamespaceDeclHandler = handler + elif event == "end-ns": + def handler(prefix, event=event, append=append): + append((event, None)) + parser.EndNamespaceDeclHandler = handler + + def next(self): + while 1: + try: + item = self._events[self._index] + except IndexError: + if self._parser is None: + self.root = self._root + try: + raise StopIteration + except NameError: + raise IndexError + # load event buffer + del self._events[:] + self._index = 0 + data = self._file.read(16384) + if data: + self._parser.feed(data) + else: + self._root = self._parser.close() + self._parser = None + else: + self._index = self._index + 1 + return item + + try: + iter + def __iter__(self): + return self + except NameError: + def __getitem__(self, index): + return self.next() + +## +# Parses an XML document from a string constant. This function can +# be used to embed "XML literals" in Python code. +# +# @param source A string containing XML data. +# @return An Element instance. +# @defreturn Element + +def XML(text): + parser = XMLTreeBuilder() + parser.feed(text) + return parser.close() + +## +# Parses an XML document from a string constant, and also returns +# a dictionary which maps from element id:s to elements. +# +# @param source A string containing XML data. +# @return A tuple containing an Element instance and a dictionary. +# @defreturn (Element, dictionary) + +def XMLID(text): + parser = XMLTreeBuilder() + parser.feed(text) + tree = parser.close() + ids = {} + for elem in tree.getiterator(): + id = elem.get("id") + if id: + ids[id] = elem + return tree, ids + +## +# Parses an XML document from a string constant. Same as {@link #XML}. +# +# @def fromstring(text) +# @param source A string containing XML data. +# @return An Element instance. +# @defreturn Element + +fromstring = XML + +## +# Generates a string representation of an XML element, including all +# subelements. +# +# @param element An Element instance. +# @return An encoded string containing the XML data. +# @defreturn string + +def tostring(element, encoding=None): + class dummy: + pass + data = [] + file = dummy() + file.write = data.append + ElementTree(element).write(file, encoding) + return string.join(data, "") + +## +# Generic element structure builder. This builder converts a sequence +# of {@link #TreeBuilder.start}, {@link #TreeBuilder.data}, and {@link +# #TreeBuilder.end} method calls to a well-formed element structure. +# <p> +# You can use this class to build an element structure using a custom XML +# parser, or a parser for some other XML-like format. +# +# @param element_factory Optional element factory. This factory +# is called to create new Element instances, as necessary. + +class TreeBuilder: + + def __init__(self, element_factory=None): + self._data = [] # data collector + self._elem = [] # element stack + self._last = None # last element + self._tail = None # true if we're after an end tag + if element_factory is None: + element_factory = _ElementInterface + self._factory = element_factory + + ## + # Flushes the parser buffers, and returns the toplevel documen + # element. + # + # @return An Element instance. + # @defreturn Element + + def close(self): + assert len(self._elem) == 0, "missing end tags" + assert self._last != None, "missing toplevel element" + return self._last + + def _flush(self): + if self._data: + if self._last is not None: + text = string.join(self._data, "") + if self._tail: + assert self._last.tail is None, "internal error (tail)" + self._last.tail = text + else: + assert self._last.text is None, "internal error (text)" + self._last.text = text + self._data = [] + + ## + # Adds text to the current element. + # + # @param data A string. This should be either an 8-bit string + # containing ASCII text, or a Unicode string. + + def data(self, data): + self._data.append(data) + + ## + # Opens a new element. + # + # @param tag The element name. + # @param attrib A dictionary containing element attributes. + # @return The opened element. + # @defreturn Element + + def start(self, tag, attrs): + self._flush() + self._last = elem = self._factory(tag, attrs) + if self._elem: + self._elem[-1].append(elem) + self._elem.append(elem) + self._tail = 0 + return elem + + ## + # Closes the current element. + # + # @param tag The element name. + # @return The closed element. + # @defreturn Element + + def end(self, tag): + self._flush() + self._last = self._elem.pop() + assert self._last.tag == tag,\ + "end tag mismatch (expected %s, got %s)" % ( + self._last.tag, tag) + self._tail = 1 + return self._last + +## +# Element structure builder for XML source data, based on the +# <b>expat</b> parser. +# +# @keyparam target Target object. If omitted, the builder uses an +# instance of the standard {@link #TreeBuilder} class. +# @keyparam html Predefine HTML entities. This flag is not supported +# by the current implementation. +# @see #ElementTree +# @see #TreeBuilder + +class XMLTreeBuilder: + + def __init__(self, html=0, target=None): + try: + from xmlcore.parsers import expat + except ImportError: + raise ImportError( + "No module named expat; use SimpleXMLTreeBuilder instead" + ) + self._parser = parser = expat.ParserCreate(None, "}") + if target is None: + target = TreeBuilder() + self._target = target + self._names = {} # name memo cache + # callbacks + parser.DefaultHandlerExpand = self._default + parser.StartElementHandler = self._start + parser.EndElementHandler = self._end + parser.CharacterDataHandler = self._data + # let expat do the buffering, if supported + try: + self._parser.buffer_text = 1 + except AttributeError: + pass + # use new-style attribute handling, if supported + try: + self._parser.ordered_attributes = 1 + self._parser.specified_attributes = 1 + parser.StartElementHandler = self._start_list + except AttributeError: + pass + encoding = None + if not parser.returns_unicode: + encoding = "utf-8" + # target.xml(encoding, None) + self._doctype = None + self.entity = {} + + def _fixtext(self, text): + # convert text string to ascii, if possible + try: + return _encode(text, "ascii") + except UnicodeError: + return text + + def _fixname(self, key): + # expand qname, and convert name string to ascii, if possible + try: + name = self._names[key] + except KeyError: + name = key + if "}" in name: + name = "{" + name + self._names[key] = name = self._fixtext(name) + return name + + def _start(self, tag, attrib_in): + fixname = self._fixname + tag = fixname(tag) + attrib = {} + for key, value in attrib_in.items(): + attrib[fixname(key)] = self._fixtext(value) + return self._target.start(tag, attrib) + + def _start_list(self, tag, attrib_in): + fixname = self._fixname + tag = fixname(tag) + attrib = {} + if attrib_in: + for i in range(0, len(attrib_in), 2): + attrib[fixname(attrib_in[i])] = self._fixtext(attrib_in[i+1]) + return self._target.start(tag, attrib) + + def _data(self, text): + return self._target.data(self._fixtext(text)) + + def _end(self, tag): + return self._target.end(self._fixname(tag)) + + def _default(self, text): + prefix = text[:1] + if prefix == "&": + # deal with undefined entities + try: + self._target.data(self.entity[text[1:-1]]) + except KeyError: + from xmlcore.parsers import expat + raise expat.error( + "undefined entity %s: line %d, column %d" % + (text, self._parser.ErrorLineNumber, + self._parser.ErrorColumnNumber) + ) + elif prefix == "<" and text[:9] == "<!DOCTYPE": + self._doctype = [] # inside a doctype declaration + elif self._doctype is not None: + # parse doctype contents + if prefix == ">": + self._doctype = None + return + text = string.strip(text) + if not text: + return + self._doctype.append(text) + n = len(self._doctype) + if n > 2: + type = self._doctype[1] + if type == "PUBLIC" and n == 4: + name, type, pubid, system = self._doctype + elif type == "SYSTEM" and n == 3: + name, type, system = self._doctype + pubid = None + else: + return + if pubid: + pubid = pubid[1:-1] + self.doctype(name, pubid, system[1:-1]) + self._doctype = None + + ## + # Handles a doctype declaration. + # + # @param name Doctype name. + # @param pubid Public identifier. + # @param system System identifier. + + def doctype(self, name, pubid, system): + pass + + ## + # Feeds data to the parser. + # + # @param data Encoded data. + + def feed(self, data): + self._parser.Parse(data, 0) + + ## + # Finishes feeding data to the parser. + # + # @return An element structure. + # @defreturn Element + + def close(self): + self._parser.Parse("", 1) # end of data + tree = self._target.close() + del self._target, self._parser # get rid of circular references + return tree diff --git a/Lib/xmlcore/etree/__init__.py b/Lib/xmlcore/etree/__init__.py index ef8d14c..cef1a6b 100644 --- a/Lib/xmlcore/etree/__init__.py +++ b/Lib/xmlcore/etree/__init__.py @@ -1,30 +1,30 @@ -# $Id: __init__.py 1821 2004-06-03 16:57:49Z fredrik $
-# elementtree package
-
-# --------------------------------------------------------------------
-# 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.
-# --------------------------------------------------------------------
+# $Id: __init__.py 1821 2004-06-03 16:57:49Z fredrik $ +# elementtree package + +# -------------------------------------------------------------------- +# 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. +# -------------------------------------------------------------------- |