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-rw-r--r--Lib/xml/dom/minicompat.py184
1 files changed, 0 insertions, 184 deletions
diff --git a/Lib/xml/dom/minicompat.py b/Lib/xml/dom/minicompat.py
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--- a/Lib/xml/dom/minicompat.py
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-"""Python version compatibility support for minidom."""
-
-# This module should only be imported using "import *".
-#
-# The following names are defined:
-#
-# isinstance -- version of the isinstance() function that accepts
-# tuples as the second parameter regardless of the
-# Python version
-#
-# NodeList -- lightest possible NodeList implementation
-#
-# EmptyNodeList -- lightest possible NodeList that is guarateed to
-# remain empty (immutable)
-#
-# StringTypes -- tuple of defined string types
-#
-# GetattrMagic -- base class used to make _get_<attr> be magically
-# invoked when available
-# defproperty -- function used in conjunction with GetattrMagic;
-# using these together is needed to make them work
-# as efficiently as possible in both Python 2.2+
-# and older versions. For example:
-#
-# class MyClass(GetattrMagic):
-# def _get_myattr(self):
-# return something
-#
-# defproperty(MyClass, "myattr",
-# "return some value")
-#
-# For Python 2.2 and newer, this will construct a
-# property object on the class, which avoids
-# needing to override __getattr__(). It will only
-# work for read-only attributes.
-#
-# For older versions of Python, inheriting from
-# GetattrMagic will use the traditional
-# __getattr__() hackery to achieve the same effect,
-# but less efficiently.
-#
-# defproperty() should be used for each version of
-# the relevant _get_<property>() function.
-#
-# NewStyle -- base class to cause __slots__ to be honored in
-# the new world
-#
-# True, False -- only for Python 2.2 and earlier
-
-__all__ = ["NodeList", "EmptyNodeList", "NewStyle",
- "StringTypes", "defproperty", "GetattrMagic"]
-
-import xml.dom
-
-try:
- unicode
-except NameError:
- StringTypes = type(''),
-else:
- StringTypes = type(''), type(unicode(''))
-
-
-# define True and False only if not defined as built-ins
-try:
- True
-except NameError:
- True = 1
- False = 0
- __all__.extend(["True", "False"])
-
-
-try:
- isinstance('', StringTypes)
-except TypeError:
- #
- # Wrap isinstance() to make it compatible with the version in
- # Python 2.2 and newer.
- #
- _isinstance = isinstance
- def isinstance(obj, type_or_seq):
- try:
- return _isinstance(obj, type_or_seq)
- except TypeError:
- for t in type_or_seq:
- if _isinstance(obj, t):
- return 1
- return 0
- __all__.append("isinstance")
-
-
-if list is type([]):
- class NodeList(list):
- __slots__ = ()
-
- def item(self, index):
- if 0 <= index < len(self):
- return self[index]
-
- def _get_length(self):
- return len(self)
-
- def _set_length(self, value):
- raise xml.dom.NoModificationAllowedErr(
- "attempt to modify read-only attribute 'length'")
-
- length = property(_get_length, _set_length,
- doc="The number of nodes in the NodeList.")
-
- def __getstate__(self):
- return list(self)
-
- def __setstate__(self, state):
- self[:] = state
-
- class EmptyNodeList(tuple):
- __slots__ = ()
-
- def __add__(self, other):
- NL = NodeList()
- NL.extend(other)
- return NL
-
- def __radd__(self, other):
- NL = NodeList()
- NL.extend(other)
- return NL
-
- def item(self, index):
- return None
-
- def _get_length(self):
- return 0
-
- def _set_length(self, value):
- raise xml.dom.NoModificationAllowedErr(
- "attempt to modify read-only attribute 'length'")
-
- length = property(_get_length, _set_length,
- doc="The number of nodes in the NodeList.")
-
-else:
- def NodeList():
- return []
-
- def EmptyNodeList():
- return []
-
-
-try:
- property
-except NameError:
- def defproperty(klass, name, doc):
- # taken care of by the base __getattr__()
- pass
-
- class GetattrMagic:
- def __getattr__(self, key):
- if key.startswith("_"):
- raise AttributeError, key
-
- try:
- get = getattr(self, "_get_" + key)
- except AttributeError:
- raise AttributeError, key
- return get()
-
- class NewStyle:
- pass
-
-else:
- def defproperty(klass, name, doc):
- get = getattr(klass, ("_get_" + name)).im_func
- def set(self, value, name=name):
- raise xml.dom.NoModificationAllowedErr(
- "attempt to modify read-only attribute " + repr(name))
- assert not hasattr(klass, "_set_" + name), \
- "expected not to find _set_" + name
- prop = property(get, set, doc=doc)
- setattr(klass, name, prop)
-
- class GetattrMagic:
- pass
-
- NewStyle = object