|
| 1 | +# -*- coding: utf-8 -*- |
| 2 | +""" |
| 3 | + jinja2._compat |
| 4 | + ~~~~~~~~~~~~~~ |
| 5 | +
|
| 6 | + Some py2/py3 compatibility support based on a stripped down |
| 7 | + version of six so we don't have to depend on a specific version |
| 8 | + of it. |
| 9 | +
|
| 10 | + :copyright: Copyright 2013 by the Jinja team, see AUTHORS. |
| 11 | + :license: BSD, see LICENSE for details. |
| 12 | +""" |
| 13 | +import sys |
| 14 | + |
| 15 | +PY2 = sys.version_info[0] == 2 |
| 16 | +PYPY = hasattr(sys, 'pypy_translation_info') |
| 17 | +_identity = lambda x: x |
| 18 | + |
| 19 | + |
| 20 | +if not PY2: |
| 21 | + unichr = chr |
| 22 | + range_type = range |
| 23 | + text_type = str |
| 24 | + string_types = (str,) |
| 25 | + |
| 26 | + iterkeys = lambda d: iter(d.keys()) |
| 27 | + itervalues = lambda d: iter(d.values()) |
| 28 | + iteritems = lambda d: iter(d.items()) |
| 29 | + |
| 30 | + import pickle |
| 31 | + from io import BytesIO, StringIO |
| 32 | + NativeStringIO = StringIO |
| 33 | + |
| 34 | + def reraise(tp, value, tb=None): |
| 35 | + if value.__traceback__ is not tb: |
| 36 | + raise value.with_traceback(tb) |
| 37 | + raise value |
| 38 | + |
| 39 | + ifilter = filter |
| 40 | + imap = map |
| 41 | + izip = zip |
| 42 | + intern = sys.intern |
| 43 | + |
| 44 | + implements_iterator = _identity |
| 45 | + implements_to_string = _identity |
| 46 | + encode_filename = _identity |
| 47 | + get_next = lambda x: x.__next__ |
| 48 | + |
| 49 | +else: |
| 50 | + unichr = unichr |
| 51 | + text_type = unicode |
| 52 | + range_type = xrange |
| 53 | + string_types = (str, unicode) |
| 54 | + |
| 55 | + iterkeys = lambda d: d.iterkeys() |
| 56 | + itervalues = lambda d: d.itervalues() |
| 57 | + iteritems = lambda d: d.iteritems() |
| 58 | + |
| 59 | + import cPickle as pickle |
| 60 | + from cStringIO import StringIO as BytesIO, StringIO |
| 61 | + NativeStringIO = BytesIO |
| 62 | + |
| 63 | + exec('def reraise(tp, value, tb=None):\n raise tp, value, tb') |
| 64 | + |
| 65 | + from itertools import imap, izip, ifilter |
| 66 | + intern = intern |
| 67 | + |
| 68 | + def implements_iterator(cls): |
| 69 | + cls.next = cls.__next__ |
| 70 | + del cls.__next__ |
| 71 | + return cls |
| 72 | + |
| 73 | + def implements_to_string(cls): |
| 74 | + cls.__unicode__ = cls.__str__ |
| 75 | + cls.__str__ = lambda x: x.__unicode__().encode('utf-8') |
| 76 | + return cls |
| 77 | + |
| 78 | + get_next = lambda x: x.next |
| 79 | + |
| 80 | + def encode_filename(filename): |
| 81 | + if isinstance(filename, unicode): |
| 82 | + return filename.encode('utf-8') |
| 83 | + return filename |
| 84 | + |
| 85 | +try: |
| 86 | + next = next |
| 87 | +except NameError: |
| 88 | + def next(it): |
| 89 | + return it.next() |
| 90 | + |
| 91 | + |
| 92 | +def with_metaclass(meta, *bases): |
| 93 | + # This requires a bit of explanation: the basic idea is to make a |
| 94 | + # dummy metaclass for one level of class instanciation that replaces |
| 95 | + # itself with the actual metaclass. Because of internal type checks |
| 96 | + # we also need to make sure that we downgrade the custom metaclass |
| 97 | + # for one level to something closer to type (that's why __call__ and |
| 98 | + # __init__ comes back from type etc.). |
| 99 | + # |
| 100 | + # This has the advantage over six.with_metaclass in that it does not |
| 101 | + # introduce dummy classes into the final MRO. |
| 102 | + class metaclass(meta): |
| 103 | + __call__ = type.__call__ |
| 104 | + __init__ = type.__init__ |
| 105 | + def __new__(cls, name, this_bases, d): |
| 106 | + if this_bases is None: |
| 107 | + return type.__new__(cls, name, (), d) |
| 108 | + return meta(name, bases, d) |
| 109 | + return metaclass('temporary_class', None, {}) |
| 110 | + |
| 111 | + |
| 112 | +try: |
| 113 | + from collections import Mapping as mapping_types |
| 114 | +except ImportError: |
| 115 | + import UserDict |
| 116 | + mapping_types = (UserDict.UserDict, UserDict.DictMixin, dict) |
| 117 | + |
| 118 | + |
| 119 | +# common types. These do exist in the special types module too which however |
| 120 | +# does not exist in IronPython out of the box. Also that way we don't have |
| 121 | +# to deal with implementation specific stuff here |
| 122 | +class _C(object): |
| 123 | + def method(self): pass |
| 124 | +def _func(): |
| 125 | + yield None |
| 126 | +function_type = type(_func) |
| 127 | +generator_type = type(_func()) |
| 128 | +method_type = type(_C().method) |
| 129 | +code_type = type(_C.method.__code__) |
| 130 | +try: |
| 131 | + raise TypeError() |
| 132 | +except TypeError: |
| 133 | + _tb = sys.exc_info()[2] |
| 134 | + traceback_type = type(_tb) |
| 135 | + frame_type = type(_tb.tb_frame) |
| 136 | + |
| 137 | + |
| 138 | +try: |
| 139 | + from urllib.parse import quote_from_bytes as url_quote |
| 140 | +except ImportError: |
| 141 | + from urllib import quote as url_quote |
| 142 | + |
| 143 | + |
| 144 | +try: |
| 145 | + from thread import allocate_lock |
| 146 | +except ImportError: |
| 147 | + try: |
| 148 | + from threading import Lock as allocate_lock |
| 149 | + except ImportError: |
| 150 | + from dummy_thread import allocate_lock |
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