diff options
Diffstat (limited to 'Lib/xmlcore/dom/minicompat.py')
| -rw-r--r-- | Lib/xmlcore/dom/minicompat.py | 175 |
1 files changed, 50 insertions, 125 deletions
diff --git a/Lib/xmlcore/dom/minicompat.py b/Lib/xmlcore/dom/minicompat.py index 364ca45..f99b7fe 100644 --- a/Lib/xmlcore/dom/minicompat.py +++ b/Lib/xmlcore/dom/minicompat.py @@ -4,10 +4,6 @@ # # 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 @@ -15,8 +11,6 @@ # # 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+ @@ -41,14 +35,8 @@ # # 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"] +__all__ = ["NodeList", "EmptyNodeList", "StringTypes", "defproperty"] import xmlcore.dom @@ -60,125 +48,62 @@ 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"]) +class NodeList(list): + __slots__ = () + def item(self, index): + if 0 <= index < len(self): + return self[index] -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 xmlcore.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 xmlcore.dom.NoModificationAllowedErr( - "attempt to modify read-only attribute 'length'") - - length = property(_get_length, _set_length, - doc="The number of nodes in the NodeList.") + def _get_length(self): + return len(self) -else: - def NodeList(): - return [] + def _set_length(self, value): + raise xml.dom.NoModificationAllowedErr( + "attempt to modify read-only attribute 'length'") - def EmptyNodeList(): - return [] + length = property(_get_length, _set_length, + doc="The number of nodes in the NodeList.") + def __getstate__(self): + return list(self) -try: - property -except NameError: - def defproperty(klass, name, doc): - # taken care of by the base __getattr__() - pass + def __setstate__(self, state): + self[:] = state - class GetattrMagic: - def __getattr__(self, key): - if key.startswith("_"): - raise AttributeError, key +class EmptyNodeList(tuple): + __slots__ = () - try: - get = getattr(self, "_get_" + key) - except AttributeError: - raise AttributeError, key - return get() + def __add__(self, other): + NL = NodeList() + NL.extend(other) + return NL - class NewStyle: - pass + def __radd__(self, other): + NL = NodeList() + NL.extend(other) + return NL -else: - def defproperty(klass, name, doc): - get = getattr(klass, ("_get_" + name)).im_func - def set(self, value, name=name): - raise xmlcore.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 + 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.") + + +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) |