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Merge pull request #8890 from alalek:remove_3rdparty_jinja2_sources

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pull/8915/head
Vadim Pisarevsky 8 years ago
parent 9fa90c8851 60f3ca458a
commit 12a1c127a9
29 changed files with 0 additions and 11197 deletions
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  1. 33
      3rdparty/jinja2/AUTHORS
  2. 31
      3rdparty/jinja2/LICENSE
  3. 69
      3rdparty/jinja2/__init__.py
  4. 150
      3rdparty/jinja2/_compat.py
  5. 132
      3rdparty/jinja2/_stringdefs.py
  6. 311
      3rdparty/jinja2/bccache.py
  7. 1640
      3rdparty/jinja2/compiler.py
  8. 32
      3rdparty/jinja2/constants.py
  9. 337
      3rdparty/jinja2/debug.py
  10. 43
      3rdparty/jinja2/defaults.py
  11. 1191
      3rdparty/jinja2/environment.py
  12. 146
      3rdparty/jinja2/exceptions.py
  13. 636
      3rdparty/jinja2/ext.py
  14. 987
      3rdparty/jinja2/filters.py
  15. 733
      3rdparty/jinja2/lexer.py
  16. 471
      3rdparty/jinja2/loaders.py
  17. 234
      3rdparty/jinja2/markupsafe/__init__.py
  18. 24
      3rdparty/jinja2/markupsafe/_compat.py
  19. 267
      3rdparty/jinja2/markupsafe/_constants.py
  20. 45
      3rdparty/jinja2/markupsafe/_native.py
  21. 103
      3rdparty/jinja2/meta.py
  22. 914
      3rdparty/jinja2/nodes.py
  23. 68
      3rdparty/jinja2/optimizer.py
  24. 895
      3rdparty/jinja2/parser.py
  25. 581
      3rdparty/jinja2/runtime.py
  26. 368
      3rdparty/jinja2/sandbox.py
  27. 149
      3rdparty/jinja2/tests.py
  28. 520
      3rdparty/jinja2/utils.py
  29. 87
      3rdparty/jinja2/visitor.py

33
3rdparty/jinja2/AUTHORS vendored
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Jinja is written and maintained by the Jinja Team and various
contributors:
Lead Developer:
- Armin Ronacher <armin.ronacher@active-4.com>
Developers:
- Christoph Hack
- Georg Brandl
Contributors:
- Bryan McLemore
- Mickaël Guérin <kael@crocobox.org>
- Cameron Knight
- Lawrence Journal-World.
- David Cramer
Patches and suggestions:
- Ronny Pfannschmidt
- Axel Böhm
- Alexey Melchakov
- Bryan McLemore
- Clovis Fabricio (nosklo)
- Cameron Knight
- Peter van Dijk (Habbie)
- Stefan Ebner
- Rene Leonhardt
- Thomas Waldmann
- Cory Benfield (Lukasa)

31
3rdparty/jinja2/LICENSE vendored
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Copyright (c) 2009 by the Jinja Team, see AUTHORS for more details.
Some rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided
with the distribution.
* The names of the contributors may not be used to endorse or
promote products derived from this software without specific
prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

69
3rdparty/jinja2/__init__.py vendored
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# -*- coding: utf-8 -*-
"""
jinja2
~~~~~~
Jinja2 is a template engine written in pure Python. It provides a
Django inspired non-XML syntax but supports inline expressions and
an optional sandboxed environment.
Nutshell
--------
Here a small example of a Jinja2 template::
{% extends 'base.html' %}
{% block title %}Memberlist{% endblock %}
{% block content %}
<ul>
{% for user in users %}
<li><a href="{{ user.url }}">{{ user.username }}</a></li>
{% endfor %}
</ul>
{% endblock %}
:copyright: (c) 2010 by the Jinja Team.
:license: BSD, see LICENSE for more details.
"""
__docformat__ = 'restructuredtext en'
__version__ = '2.7.1'
# high level interface
from jinja2.environment import Environment, Template
# loaders
from jinja2.loaders import BaseLoader, FileSystemLoader, PackageLoader, \
DictLoader, FunctionLoader, PrefixLoader, ChoiceLoader, \
ModuleLoader
# bytecode caches
from jinja2.bccache import BytecodeCache, FileSystemBytecodeCache, \
MemcachedBytecodeCache
# undefined types
from jinja2.runtime import Undefined, DebugUndefined, StrictUndefined
# exceptions
from jinja2.exceptions import TemplateError, UndefinedError, \
TemplateNotFound, TemplatesNotFound, TemplateSyntaxError, \
TemplateAssertionError
# decorators and public utilities
from jinja2.filters import environmentfilter, contextfilter, \
evalcontextfilter
from jinja2.utils import Markup, escape, clear_caches, \
environmentfunction, evalcontextfunction, contextfunction, \
is_undefined
__all__ = [
'Environment', 'Template', 'BaseLoader', 'FileSystemLoader',
'PackageLoader', 'DictLoader', 'FunctionLoader', 'PrefixLoader',
'ChoiceLoader', 'BytecodeCache', 'FileSystemBytecodeCache',
'MemcachedBytecodeCache', 'Undefined', 'DebugUndefined',
'StrictUndefined', 'TemplateError', 'UndefinedError', 'TemplateNotFound',
'TemplatesNotFound', 'TemplateSyntaxError', 'TemplateAssertionError',
'ModuleLoader', 'environmentfilter', 'contextfilter', 'Markup', 'escape',
'environmentfunction', 'contextfunction', 'clear_caches', 'is_undefined',
'evalcontextfilter', 'evalcontextfunction'
]

150
3rdparty/jinja2/_compat.py vendored
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# -*- coding: utf-8 -*-
"""
jinja2._compat
~~~~~~~~~~~~~~
Some py2/py3 compatibility support based on a stripped down
version of six so we don't have to depend on a specific version
of it.
:copyright: Copyright 2013 by the Jinja team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
import sys
PY2 = sys.version_info[0] == 2
PYPY = hasattr(sys, 'pypy_translation_info')
_identity = lambda x: x
if not PY2:
unichr = chr
range_type = range
text_type = str
string_types = (str,)
iterkeys = lambda d: iter(d.keys())
itervalues = lambda d: iter(d.values())
iteritems = lambda d: iter(d.items())
import pickle
from io import BytesIO, StringIO
NativeStringIO = StringIO
def reraise(tp, value, tb=None):
if value.__traceback__ is not tb:
raise value.with_traceback(tb)
raise value
ifilter = filter
imap = map
izip = zip
intern = sys.intern
implements_iterator = _identity
implements_to_string = _identity
encode_filename = _identity
get_next = lambda x: x.__next__
else:
unichr = unichr
text_type = unicode
range_type = xrange
string_types = (str, unicode)
iterkeys = lambda d: d.iterkeys()
itervalues = lambda d: d.itervalues()
iteritems = lambda d: d.iteritems()
import cPickle as pickle
from cStringIO import StringIO as BytesIO, StringIO
NativeStringIO = BytesIO
exec('def reraise(tp, value, tb=None):\n raise tp, value, tb')
from itertools import imap, izip, ifilter
intern = intern
def implements_iterator(cls):
cls.next = cls.__next__
del cls.__next__
return cls
def implements_to_string(cls):
cls.__unicode__ = cls.__str__
cls.__str__ = lambda x: x.__unicode__().encode('utf-8')
return cls
get_next = lambda x: x.next
def encode_filename(filename):
if isinstance(filename, unicode):
return filename.encode('utf-8')
return filename
try:
next = next
except NameError:
def next(it):
return it.next()
def with_metaclass(meta, *bases):
# This requires a bit of explanation: the basic idea is to make a
# dummy metaclass for one level of class instanciation that replaces
# itself with the actual metaclass. Because of internal type checks
# we also need to make sure that we downgrade the custom metaclass
# for one level to something closer to type (that's why __call__ and
# __init__ comes back from type etc.).
#
# This has the advantage over six.with_metaclass in that it does not
# introduce dummy classes into the final MRO.
class metaclass(meta):
__call__ = type.__call__
__init__ = type.__init__
def __new__(cls, name, this_bases, d):
if this_bases is None:
return type.__new__(cls, name, (), d)
return meta(name, bases, d)
return metaclass('temporary_class', None, {})
try:
from collections import Mapping as mapping_types
except ImportError:
import UserDict
mapping_types = (UserDict.UserDict, UserDict.DictMixin, dict)
# common types. These do exist in the special types module too which however
# does not exist in IronPython out of the box. Also that way we don't have
# to deal with implementation specific stuff here
class _C(object):
def method(self): pass
def _func():
yield None
function_type = type(_func)
generator_type = type(_func())
method_type = type(_C().method)
code_type = type(_C.method.__code__)
try:
raise TypeError()
except TypeError:
_tb = sys.exc_info()[2]
traceback_type = type(_tb)
frame_type = type(_tb.tb_frame)
try:
from urllib.parse import quote_from_bytes as url_quote
except ImportError:
from urllib import quote as url_quote
try:
from thread import allocate_lock
except ImportError:
try:
from threading import Lock as allocate_lock
except ImportError:
from dummy_thread import allocate_lock

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311
3rdparty/jinja2/bccache.py vendored
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# -*- coding: utf-8 -*-
"""
jinja2.bccache
~~~~~~~~~~~~~~
This module implements the bytecode cache system Jinja is optionally
using. This is useful if you have very complex template situations and
the compiliation of all those templates slow down your application too
much.
Situations where this is useful are often forking web applications that
are initialized on the first request.
:copyright: (c) 2010 by the Jinja Team.
:license: BSD.
"""
from os import path, listdir
import sys
import marshal
import tempfile
import fnmatch
from hashlib import sha1
from jinja2.utils import open_if_exists
from jinja2._compat import BytesIO, pickle, PY2, text_type
# marshal works better on 3.x, one hack less required
if not PY2:
marshal_dump = marshal.dump
marshal_load = marshal.load
else:
def marshal_dump(code, f):
if isinstance(f, file):
marshal.dump(code, f)
else:
f.write(marshal.dumps(code))
def marshal_load(f):
if isinstance(f, file):
return marshal.load(f)
return marshal.loads(f.read())
bc_version = 2
# magic version used to only change with new jinja versions. With 2.6
# we change this to also take Python version changes into account. The
# reason for this is that Python tends to segfault if fed earlier bytecode
# versions because someone thought it would be a good idea to reuse opcodes
# or make Python incompatible with earlier versions.
bc_magic = 'j2'.encode('ascii') + \
pickle.dumps(bc_version, 2) + \
pickle.dumps((sys.version_info[0] << 24) | sys.version_info[1])
class Bucket(object):
"""Buckets are used to store the bytecode for one template. It's created
and initialized by the bytecode cache and passed to the loading functions.
The buckets get an internal checksum from the cache assigned and use this
to automatically reject outdated cache material. Individual bytecode
cache subclasses don't have to care about cache invalidation.
"""
def __init__(self, environment, key, checksum):
self.environment = environment
self.key = key
self.checksum = checksum
self.reset()
def reset(self):
"""Resets the bucket (unloads the bytecode)."""
self.code = None
def load_bytecode(self, f):
"""Loads bytecode from a file or file like object."""
# make sure the magic header is correct
magic = f.read(len(bc_magic))
if magic != bc_magic:
self.reset()
return
# the source code of the file changed, we need to reload
checksum = pickle.load(f)
if self.checksum != checksum:
self.reset()
return
self.code = marshal_load(f)
def write_bytecode(self, f):
"""Dump the bytecode into the file or file like object passed."""
if self.code is None:
raise TypeError('can\'t write empty bucket')
f.write(bc_magic)
pickle.dump(self.checksum, f, 2)
marshal_dump(self.code, f)
def bytecode_from_string(self, string):
"""Load bytecode from a string."""
self.load_bytecode(BytesIO(string))
def bytecode_to_string(self):
"""Return the bytecode as string."""
out = BytesIO()
self.write_bytecode(out)
return out.getvalue()
class BytecodeCache(object):
"""To implement your own bytecode cache you have to subclass this class
and override :meth:`load_bytecode` and :meth:`dump_bytecode`. Both of
these methods are passed a :class:`~jinja2.bccache.Bucket`.
A very basic bytecode cache that saves the bytecode on the file system::
from os import path
class MyCache(BytecodeCache):
def __init__(self, directory):
self.directory = directory
def load_bytecode(self, bucket):
filename = path.join(self.directory, bucket.key)
if path.exists(filename):
with open(filename, 'rb') as f:
bucket.load_bytecode(f)
def dump_bytecode(self, bucket):
filename = path.join(self.directory, bucket.key)
with open(filename, 'wb') as f:
bucket.write_bytecode(f)
A more advanced version of a filesystem based bytecode cache is part of
Jinja2.
"""
def load_bytecode(self, bucket):
"""Subclasses have to override this method to load bytecode into a
bucket. If they are not able to find code in the cache for the
bucket, it must not do anything.
"""
raise NotImplementedError()
def dump_bytecode(self, bucket):
"""Subclasses have to override this method to write the bytecode
from a bucket back to the cache. If it unable to do so it must not
fail silently but raise an exception.
"""
raise NotImplementedError()
def clear(self):
"""Clears the cache. This method is not used by Jinja2 but should be
implemented to allow applications to clear the bytecode cache used
by a particular environment.
"""
def get_cache_key(self, name, filename=None):
"""Returns the unique hash key for this template name."""
hash = sha1(name.encode('utf-8'))
if filename is not None:
filename = '|' + filename
if isinstance(filename, text_type):
filename = filename.encode('utf-8')
hash.update(filename)
return hash.hexdigest()
def get_source_checksum(self, source):
"""Returns a checksum for the source."""
return sha1(source.encode('utf-8')).hexdigest()
def get_bucket(self, environment, name, filename, source):
"""Return a cache bucket for the given template. All arguments are
mandatory but filename may be `None`.
"""
key = self.get_cache_key(name, filename)
checksum = self.get_source_checksum(source)
bucket = Bucket(environment, key, checksum)
self.load_bytecode(bucket)
return bucket
def set_bucket(self, bucket):
"""Put the bucket into the cache."""
self.dump_bytecode(bucket)
class FileSystemBytecodeCache(BytecodeCache):
"""A bytecode cache that stores bytecode on the filesystem. It accepts
two arguments: The directory where the cache items are stored and a
pattern string that is used to build the filename.
If no directory is specified the system temporary items folder is used.
The pattern can be used to have multiple separate caches operate on the
same directory. The default pattern is ``'__jinja2_%s.cache'``. ``%s``
is replaced with the cache key.
>>> bcc = FileSystemBytecodeCache('/tmp/jinja_cache', '%s.cache')
This bytecode cache supports clearing of the cache using the clear method.
"""
def __init__(self, directory=None, pattern='__jinja2_%s.cache'):
if directory is None:
directory = tempfile.gettempdir()
self.directory = directory
self.pattern = pattern
def _get_cache_filename(self, bucket):
return path.join(self.directory, self.pattern % bucket.key)
def load_bytecode(self, bucket):
f = open_if_exists(self._get_cache_filename(bucket), 'rb')
if f is not None:
try:
bucket.load_bytecode(f)
finally:
f.close()
def dump_bytecode(self, bucket):
f = open(self._get_cache_filename(bucket), 'wb')
try:
bucket.write_bytecode(f)
finally:
f.close()
def clear(self):
# imported lazily here because google app-engine doesn't support
# write access on the file system and the function does not exist
# normally.
from os import remove
files = fnmatch.filter(listdir(self.directory), self.pattern % '*')
for filename in files:
try:
remove(path.join(self.directory, filename))
except OSError:
pass
class MemcachedBytecodeCache(BytecodeCache):
"""This class implements a bytecode cache that uses a memcache cache for
storing the information. It does not enforce a specific memcache library
(tummy's memcache or cmemcache) but will accept any class that provides
the minimal interface required.
Libraries compatible with this class:
- `werkzeug <http://werkzeug.pocoo.org/>`_.contrib.cache
- `python-memcached <http://www.tummy.com/Community/software/python-memcached/>`_
- `cmemcache <http://gijsbert.org/cmemcache/>`_
(Unfortunately the django cache interface is not compatible because it
does not support storing binary data, only unicode. You can however pass
the underlying cache client to the bytecode cache which is available
as `django.core.cache.cache._client`.)
The minimal interface for the client passed to the constructor is this:
.. class:: MinimalClientInterface
.. method:: set(key, value[, timeout])
Stores the bytecode in the cache. `value` is a string and
`timeout` the timeout of the key. If timeout is not provided
a default timeout or no timeout should be assumed, if it's
provided it's an integer with the number of seconds the cache
item should exist.
.. method:: get(key)
Returns the value for the cache key. If the item does not
exist in the cache the return value must be `None`.
The other arguments to the constructor are the prefix for all keys that
is added before the actual cache key and the timeout for the bytecode in
the cache system. We recommend a high (or no) timeout.
This bytecode cache does not support clearing of used items in the cache.
The clear method is a no-operation function.
.. versionadded:: 2.7
Added support for ignoring memcache errors through the
`ignore_memcache_errors` parameter.
"""
def __init__(self, client, prefix='jinja2/bytecode/', timeout=None,
ignore_memcache_errors=True):
self.client = client
self.prefix = prefix
self.timeout = timeout
self.ignore_memcache_errors = ignore_memcache_errors
def load_bytecode(self, bucket):
try:
code = self.client.get(self.prefix + bucket.key)
except Exception:
if not self.ignore_memcache_errors:
raise
code = None
if code is not None:
bucket.bytecode_from_string(code)
def dump_bytecode(self, bucket):
args = (self.prefix + bucket.key, bucket.bytecode_to_string())
if self.timeout is not None:
args += (self.timeout,)
try:
self.client.set(*args)
except Exception:
if not self.ignore_memcache_errors:
raise

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32
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# -*- coding: utf-8 -*-
"""
jinja.constants
~~~~~~~~~~~~~~~
Various constants.
:copyright: (c) 2010 by the Jinja Team.
:license: BSD, see LICENSE for more details.
"""
#: list of lorem ipsum words used by the lipsum() helper function
LOREM_IPSUM_WORDS = u'''\
a ac accumsan ad adipiscing aenean aliquam aliquet amet ante aptent arcu at
auctor augue bibendum blandit class commodo condimentum congue consectetuer
consequat conubia convallis cras cubilia cum curabitur curae cursus dapibus
diam dictum dictumst dignissim dis dolor donec dui duis egestas eget eleifend
elementum elit enim erat eros est et etiam eu euismod facilisi facilisis fames
faucibus felis fermentum feugiat fringilla fusce gravida habitant habitasse hac
hendrerit hymenaeos iaculis id imperdiet in inceptos integer interdum ipsum
justo lacinia lacus laoreet lectus leo libero ligula litora lobortis lorem
luctus maecenas magna magnis malesuada massa mattis mauris metus mi molestie
mollis montes morbi mus nam nascetur natoque nec neque netus nibh nisi nisl non
nonummy nostra nulla nullam nunc odio orci ornare parturient pede pellentesque
penatibus per pharetra phasellus placerat platea porta porttitor posuere
potenti praesent pretium primis proin pulvinar purus quam quis quisque rhoncus
ridiculus risus rutrum sagittis sapien scelerisque sed sem semper senectus sit
sociis sociosqu sodales sollicitudin suscipit suspendisse taciti tellus tempor
tempus tincidunt torquent tortor tristique turpis ullamcorper ultrices
ultricies urna ut varius vehicula vel velit venenatis vestibulum vitae vivamus
viverra volutpat vulputate'''

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# -*- coding: utf-8 -*-
"""
jinja2.debug
~~~~~~~~~~~~
Implements the debug interface for Jinja. This module does some pretty
ugly stuff with the Python traceback system in order to achieve tracebacks
with correct line numbers, locals and contents.
:copyright: (c) 2010 by the Jinja Team.
:license: BSD, see LICENSE for more details.
"""
import sys
import traceback
from types import TracebackType
from jinja2.utils import missing, internal_code
from jinja2.exceptions import TemplateSyntaxError
from jinja2._compat import iteritems, reraise, code_type
# on pypy we can take advantage of transparent proxies
try:
from __pypy__ import tproxy
except ImportError:
tproxy = None
# how does the raise helper look like?
try:
exec("raise TypeError, 'foo'")
except SyntaxError:
raise_helper = 'raise __jinja_exception__[1]'
except TypeError:
raise_helper = 'raise __jinja_exception__[0], __jinja_exception__[1]'
class TracebackFrameProxy(object):
"""Proxies a traceback frame."""
def __init__(self, tb):
self.tb = tb
self._tb_next = None
@property
def tb_next(self):
return self._tb_next
def set_next(self, next):
if tb_set_next is not None:
try:
tb_set_next(self.tb, next and next.tb or None)
except Exception:
# this function can fail due to all the hackery it does
# on various python implementations. We just catch errors
# down and ignore them if necessary.
pass
self._tb_next = next
@property
def is_jinja_frame(self):
return '__jinja_template__' in self.tb.tb_frame.f_globals
def __getattr__(self, name):
return getattr(self.tb, name)
def make_frame_proxy(frame):
proxy = TracebackFrameProxy(frame)
if tproxy is None:
return proxy
def operation_handler(operation, *args, **kwargs):
if operation in ('__getattribute__', '__getattr__'):
return getattr(proxy, args[0])
elif operation == '__setattr__':
proxy.__setattr__(*args, **kwargs)
else:
return getattr(proxy, operation)(*args, **kwargs)
return tproxy(TracebackType, operation_handler)
class ProcessedTraceback(object):
"""Holds a Jinja preprocessed traceback for printing or reraising."""
def __init__(self, exc_type, exc_value, frames):
assert frames, 'no frames for this traceback?'
self.exc_type = exc_type
self.exc_value = exc_value
self.frames = frames
# newly concatenate the frames (which are proxies)
prev_tb = None
for tb in self.frames:
if prev_tb is not None:
prev_tb.set_next(tb)
prev_tb = tb
prev_tb.set_next(None)
def render_as_text(self, limit=None):
"""Return a string with the traceback."""
lines = traceback.format_exception(self.exc_type, self.exc_value,
self.frames[0], limit=limit)
return ''.join(lines).rstrip()
def render_as_html(self, full=False):
"""Return a unicode string with the traceback as rendered HTML."""
from jinja2.debugrenderer import render_traceback
return u'%s\n\n<!--\n%s\n-->' % (
render_traceback(self, full=full),
self.render_as_text().decode('utf-8', 'replace')
)
@property
def is_template_syntax_error(self):
"""`True` if this is a template syntax error."""
return isinstance(self.exc_value, TemplateSyntaxError)
@property
def exc_info(self):
"""Exception info tuple with a proxy around the frame objects."""
return self.exc_type, self.exc_value, self.frames[0]
@property
def standard_exc_info(self):
"""Standard python exc_info for re-raising"""
tb = self.frames[0]
# the frame will be an actual traceback (or transparent proxy) if
# we are on pypy or a python implementation with support for tproxy
if type(tb) is not TracebackType:
tb = tb.tb
return self.exc_type, self.exc_value, tb
def make_traceback(exc_info, source_hint=None):
"""Creates a processed traceback object from the exc_info."""
exc_type, exc_value, tb = exc_info
if isinstance(exc_value, TemplateSyntaxError):
exc_info = translate_syntax_error(exc_value, source_hint)
initial_skip = 0
else:
initial_skip = 1
return translate_exception(exc_info, initial_skip)
def translate_syntax_error(error, source=None):
"""Rewrites a syntax error to please traceback systems."""
error.source = source
error.translated = True
exc_info = (error.__class__, error, None)
filename = error.filename
if filename is None:
filename = '<unknown>'
return fake_exc_info(exc_info, filename, error.lineno)
def translate_exception(exc_info, initial_skip=0):
"""If passed an exc_info it will automatically rewrite the exceptions
all the way down to the correct line numbers and frames.
"""
tb = exc_info[2]
frames = []
# skip some internal frames if wanted
for x in range(initial_skip):
if tb is not None:
tb = tb.tb_next
initial_tb = tb
while tb is not None:
# skip frames decorated with @internalcode. These are internal
# calls we can't avoid and that are useless in template debugging
# output.
if tb.tb_frame.f_code in internal_code:
tb = tb.tb_next
continue
# save a reference to the next frame if we override the current
# one with a faked one.
next = tb.tb_next
# fake template exceptions
template = tb.tb_frame.f_globals.get('__jinja_template__')
if template is not None:
lineno = template.get_corresponding_lineno(tb.tb_lineno)
tb = fake_exc_info(exc_info[:2] + (tb,), template.filename,
lineno)[2]
frames.append(make_frame_proxy(tb))
tb = next
# if we don't have any exceptions in the frames left, we have to
# reraise it unchanged.
# XXX: can we backup here? when could this happen?
if not frames:
reraise(exc_info[0], exc_info[1], exc_info[2])
return ProcessedTraceback(exc_info[0], exc_info[1], frames)
def fake_exc_info(exc_info, filename, lineno):
"""Helper for `translate_exception`."""
exc_type, exc_value, tb = exc_info
# figure the real context out
if tb is not None:
real_locals = tb.tb_frame.f_locals.copy()
ctx = real_locals.get('context')
if ctx:
locals = ctx.get_all()
else:
locals = {}
for name, value in iteritems(real_locals):
if name.startswith('l_') and value is not missing:
locals[name[2:]] = value
# if there is a local called __jinja_exception__, we get
# rid of it to not break the debug functionality.
locals.pop('__jinja_exception__', None)
else:
locals = {}
# assamble fake globals we need
globals = {
'__name__': filename,
'__file__': filename,
'__jinja_exception__': exc_info[:2],
# we don't want to keep the reference to the template around
# to not cause circular dependencies, but we mark it as Jinja
# frame for the ProcessedTraceback
'__jinja_template__': None
}
# and fake the exception
code = compile('\n' * (lineno - 1) + raise_helper, filename, 'exec')
# if it's possible, change the name of the code. This won't work
# on some python environments such as google appengine
try:
if tb is None:
location = 'template'
else:
function = tb.tb_frame.f_code.co_name
if function == 'root':
location = 'top-level template code'
elif function.startswith('block_'):
location = 'block "%s"' % function[6:]
else:
location = 'template'
code = code_type(0, code.co_nlocals, code.co_stacksize,
code.co_flags, code.co_code, code.co_consts,
code.co_names, code.co_varnames, filename,
location, code.co_firstlineno,
code.co_lnotab, (), ())
except:
pass
# execute the code and catch the new traceback
try:
exec(code, globals, locals)
except:
exc_info = sys.exc_info()
new_tb = exc_info[2].tb_next
# return without this frame
return exc_info[:2] + (new_tb,)
def _init_ugly_crap():
"""This function implements a few ugly things so that we can patch the
traceback objects. The function returned allows resetting `tb_next` on
any python traceback object. Do not attempt to use this on non cpython
interpreters
"""
import ctypes
from types import TracebackType
# figure out side of _Py_ssize_t
if hasattr(ctypes.pythonapi, 'Py_InitModule4_64'):
_Py_ssize_t = ctypes.c_int64
else:
_Py_ssize_t = ctypes.c_int
# regular python
class _PyObject(ctypes.Structure):
pass
_PyObject._fields_ = [
('ob_refcnt', _Py_ssize_t),
('ob_type', ctypes.POINTER(_PyObject))
]
# python with trace
if hasattr(sys, 'getobjects'):
class _PyObject(ctypes.Structure):
pass
_PyObject._fields_ = [
('_ob_next', ctypes.POINTER(_PyObject)),
('_ob_prev', ctypes.POINTER(_PyObject)),
('ob_refcnt', _Py_ssize_t),
('ob_type', ctypes.POINTER(_PyObject))
]
class _Traceback(_PyObject):
pass
_Traceback._fields_ = [
('tb_next', ctypes.POINTER(_Traceback)),
('tb_frame', ctypes.POINTER(_PyObject)),
('tb_lasti', ctypes.c_int),
('tb_lineno', ctypes.c_int)
]
def tb_set_next(tb, next):
"""Set the tb_next attribute of a traceback object."""
if not (isinstance(tb, TracebackType) and
(next is None or isinstance(next, TracebackType))):
raise TypeError('tb_set_next arguments must be traceback objects')
obj = _Traceback.from_address(id(tb))
if tb.tb_next is not None:
old = _Traceback.from_address(id(tb.tb_next))
old.ob_refcnt -= 1
if next is None:
obj.tb_next = ctypes.POINTER(_Traceback)()
else:
next = _Traceback.from_address(id(next))
next.ob_refcnt += 1
obj.tb_next = ctypes.pointer(next)
return tb_set_next
# try to get a tb_set_next implementation if we don't have transparent
# proxies.
tb_set_next = None
if tproxy is None:
try:
tb_set_next = _init_ugly_crap()
except:
pass
del _init_ugly_crap

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# -*- coding: utf-8 -*-
"""
jinja2.defaults
~~~~~~~~~~~~~~~
Jinja default filters and tags.
:copyright: (c) 2010 by the Jinja Team.
:license: BSD, see LICENSE for more details.
"""
from jinja2._compat import range_type
from jinja2.utils import generate_lorem_ipsum, Cycler, Joiner
# defaults for the parser / lexer
BLOCK_START_STRING = '{%'
BLOCK_END_STRING = '%}'
VARIABLE_START_STRING = '{{'
VARIABLE_END_STRING = '}}'
COMMENT_START_STRING = '{#'
COMMENT_END_STRING = '#}'
LINE_STATEMENT_PREFIX = None
LINE_COMMENT_PREFIX = None
TRIM_BLOCKS = False
LSTRIP_BLOCKS = False
NEWLINE_SEQUENCE = '\n'
KEEP_TRAILING_NEWLINE = False
# default filters, tests and namespace
from jinja2.filters import FILTERS as DEFAULT_FILTERS
from jinja2.tests import TESTS as DEFAULT_TESTS
DEFAULT_NAMESPACE = {
'range': range_type,
'dict': lambda **kw: kw,
'lipsum': generate_lorem_ipsum,
'cycler': Cycler,
'joiner': Joiner
}
# export all constants
__all__ = tuple(x for x in locals().keys() if x.isupper())

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# -*- coding: utf-8 -*-
"""
jinja2.exceptions
~~~~~~~~~~~~~~~~~
Jinja exceptions.
:copyright: (c) 2010 by the Jinja Team.
:license: BSD, see LICENSE for more details.
"""
from jinja2._compat import imap, text_type, PY2, implements_to_string
class TemplateError(Exception):
"""Baseclass for all template errors."""
if PY2:
def __init__(self, message=None):
if message is not None:
message = text_type(message).encode('utf-8')
Exception.__init__(self, message)
@property
def message(self):
if self.args:
message = self.args[0]
if message is not None:
return message.decode('utf-8', 'replace')
def __unicode__(self):
return self.message or u''
else:
def __init__(self, message=None):
Exception.__init__(self, message)
@property
def message(self):
if self.args:
message = self.args[0]
if message is not None:
return message
@implements_to_string
class TemplateNotFound(IOError, LookupError, TemplateError):
"""Raised if a template does not exist."""
# looks weird, but removes the warning descriptor that just
# bogusly warns us about message being deprecated
message = None
def __init__(self, name, message=None):
IOError.__init__(self)
if message is None:
message = name
self.message = message
self.name = name
self.templates = [name]
def __str__(self):
return self.message
class TemplatesNotFound(TemplateNotFound):
"""Like :class:`TemplateNotFound` but raised if multiple templates
are selected. This is a subclass of :class:`TemplateNotFound`
exception, so just catching the base exception will catch both.
.. versionadded:: 2.2
"""
def __init__(self, names=(), message=None):
if message is None:
message = u'none of the templates given were found: ' + \
u', '.join(imap(text_type, names))
TemplateNotFound.__init__(self, names and names[-1] or None, message)
self.templates = list(names)
@implements_to_string
class TemplateSyntaxError(TemplateError):
"""Raised to tell the user that there is a problem with the template."""
def __init__(self, message, lineno, name=None, filename=None):
TemplateError.__init__(self, message)
self.lineno = lineno
self.name = name
self.filename = filename
self.source = None
# this is set to True if the debug.translate_syntax_error
# function translated the syntax error into a new traceback
self.translated = False
def __str__(self):
# for translated errors we only return the message
if self.translated:
return self.message
# otherwise attach some stuff
location = 'line %d' % self.lineno
name = self.filename or self.name
if name:
location = 'File "%s", %s' % (name, location)
lines = [self.message, ' ' + location]
# if the source is set, add the line to the output
if self.source is not None:
try:
line = self.source.splitlines()[self.lineno - 1]
except IndexError:
line = None
if line:
lines.append(' ' + line.strip())
return u'\n'.join(lines)
class TemplateAssertionError(TemplateSyntaxError):
"""Like a template syntax error, but covers cases where something in the
template caused an error at compile time that wasn't necessarily caused
by a syntax error. However it's a direct subclass of
:exc:`TemplateSyntaxError` and has the same attributes.
"""
class TemplateRuntimeError(TemplateError):
"""A generic runtime error in the template engine. Under some situations
Jinja may raise this exception.
"""
class UndefinedError(TemplateRuntimeError):
"""Raised if a template tries to operate on :class:`Undefined`."""
class SecurityError(TemplateRuntimeError):
"""Raised if a template tries to do something insecure if the
sandbox is enabled.
"""
class FilterArgumentError(TemplateRuntimeError):
"""This error is raised if a filter was called with inappropriate
arguments
"""

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# -*- coding: utf-8 -*-
"""
jinja2.ext
~~~~~~~~~~
Jinja extensions allow to add custom tags similar to the way django custom
tags work. By default two example extensions exist: an i18n and a cache
extension.
:copyright: (c) 2010 by the Jinja Team.
:license: BSD.
"""
from jinja2 import nodes
from jinja2.defaults import BLOCK_START_STRING, \
BLOCK_END_STRING, VARIABLE_START_STRING, VARIABLE_END_STRING, \
COMMENT_START_STRING, COMMENT_END_STRING, LINE_STATEMENT_PREFIX, \
LINE_COMMENT_PREFIX, TRIM_BLOCKS, NEWLINE_SEQUENCE, \
KEEP_TRAILING_NEWLINE, LSTRIP_BLOCKS
from jinja2.environment import Environment
from jinja2.runtime import concat
from jinja2.exceptions import TemplateAssertionError, TemplateSyntaxError
from jinja2.utils import contextfunction, import_string, Markup
from jinja2._compat import next, with_metaclass, string_types, iteritems
# the only real useful gettext functions for a Jinja template. Note
# that ugettext must be assigned to gettext as Jinja doesn't support
# non unicode strings.
GETTEXT_FUNCTIONS = ('_', 'gettext', 'ngettext')
class ExtensionRegistry(type):
"""Gives the extension an unique identifier."""
def __new__(cls, name, bases, d):
rv = type.__new__(cls, name, bases, d)
rv.identifier = rv.__module__ + '.' + rv.__name__
return rv
class Extension(with_metaclass(ExtensionRegistry, object)):
"""Extensions can be used to add extra functionality to the Jinja template
system at the parser level. Custom extensions are bound to an environment
but may not store environment specific data on `self`. The reason for
this is that an extension can be bound to another environment (for
overlays) by creating a copy and reassigning the `environment` attribute.
As extensions are created by the environment they cannot accept any
arguments for configuration. One may want to work around that by using
a factory function, but that is not possible as extensions are identified
by their import name. The correct way to configure the extension is
storing the configuration values on the environment. Because this way the
environment ends up acting as central configuration storage the
attributes may clash which is why extensions have to ensure that the names
they choose for configuration are not too generic. ``prefix`` for example
is a terrible name, ``fragment_cache_prefix`` on the other hand is a good
name as includes the name of the extension (fragment cache).
"""
#: if this extension parses this is the list of tags it's listening to.
tags = set()
#: the priority of that extension. This is especially useful for
#: extensions that preprocess values. A lower value means higher
#: priority.
#:
#: .. versionadded:: 2.4
priority = 100
def __init__(self, environment):
self.environment = environment
def bind(self, environment):
"""Create a copy of this extension bound to another environment."""
rv = object.__new__(self.__class__)
rv.__dict__.update(self.__dict__)
rv.environment = environment
return rv
def preprocess(self, source, name, filename=None):
"""This method is called before the actual lexing and can be used to
preprocess the source. The `filename` is optional. The return value
must be the preprocessed source.
"""
return source
def filter_stream(self, stream):
"""It's passed a :class:`~jinja2.lexer.TokenStream` that can be used
to filter tokens returned. This method has to return an iterable of
:class:`~jinja2.lexer.Token`\s, but it doesn't have to return a
:class:`~jinja2.lexer.TokenStream`.
In the `ext` folder of the Jinja2 source distribution there is a file
called `inlinegettext.py` which implements a filter that utilizes this
method.
"""
return stream
def parse(self, parser):
"""If any of the :attr:`tags` matched this method is called with the
parser as first argument. The token the parser stream is pointing at
is the name token that matched. This method has to return one or a
list of multiple nodes.
"""
raise NotImplementedError()
def attr(self, name, lineno=None):
"""Return an attribute node for the current extension. This is useful
to pass constants on extensions to generated template code.
::
self.attr('_my_attribute', lineno=lineno)
"""
return nodes.ExtensionAttribute(self.identifier, name, lineno=lineno)
def call_method(self, name, args=None, kwargs=None, dyn_args=None,
dyn_kwargs=None, lineno=None):
"""Call a method of the extension. This is a shortcut for
:meth:`attr` + :class:`jinja2.nodes.Call`.
"""
if args is None:
args = []
if kwargs is None:
kwargs = []
return nodes.Call(self.attr(name, lineno=lineno), args, kwargs,
dyn_args, dyn_kwargs, lineno=lineno)
@contextfunction
def _gettext_alias(__context, *args, **kwargs):
return __context.call(__context.resolve('gettext'), *args, **kwargs)
def _make_new_gettext(func):
@contextfunction
def gettext(__context, __string, **variables):
rv = __context.call(func, __string)
if __context.eval_ctx.autoescape:
rv = Markup(rv)
return rv % variables
return gettext
def _make_new_ngettext(func):
@contextfunction
def ngettext(__context, __singular, __plural, __num, **variables):
variables.setdefault('num', __num)
rv = __context.call(func, __singular, __plural, __num)
if __context.eval_ctx.autoescape:
rv = Markup(rv)
return rv % variables
return ngettext
class InternationalizationExtension(Extension):
"""This extension adds gettext support to Jinja2."""
tags = set(['trans'])
# TODO: the i18n extension is currently reevaluating values in a few
# situations. Take this example:
# {% trans count=something() %}{{ count }} foo{% pluralize
# %}{{ count }} fooss{% endtrans %}
# something is called twice here. One time for the gettext value and
# the other time for the n-parameter of the ngettext function.
def __init__(self, environment):
Extension.__init__(self, environment)
environment.globals['_'] = _gettext_alias
environment.extend(
install_gettext_translations=self._install,
install_null_translations=self._install_null,
install_gettext_callables=self._install_callables,
uninstall_gettext_translations=self._uninstall,
extract_translations=self._extract,
newstyle_gettext=False
)
def _install(self, translations, newstyle=None):
gettext = getattr(translations, 'ugettext', None)
if gettext is None:
gettext = translations.gettext
ngettext = getattr(translations, 'ungettext', None)
if ngettext is None:
ngettext = translations.ngettext
self._install_callables(gettext, ngettext, newstyle)
def _install_null(self, newstyle=None):
self._install_callables(
lambda x: x,
lambda s, p, n: (n != 1 and (p,) or (s,))[0],
newstyle
)
def _install_callables(self, gettext, ngettext, newstyle=None):
if newstyle is not None:
self.environment.newstyle_gettext = newstyle
if self.environment.newstyle_gettext:
gettext = _make_new_gettext(gettext)
ngettext = _make_new_ngettext(ngettext)
self.environment.globals.update(
gettext=gettext,
ngettext=ngettext
)
def _uninstall(self, translations):
for key in 'gettext', 'ngettext':
self.environment.globals.pop(key, None)
def _extract(self, source, gettext_functions=GETTEXT_FUNCTIONS):
if isinstance(source, string_types):
source = self.environment.parse(source)
return extract_from_ast(source, gettext_functions)
def parse(self, parser):
"""Parse a translatable tag."""
lineno = next(parser.stream).lineno
num_called_num = False
# find all the variables referenced. Additionally a variable can be
# defined in the body of the trans block too, but this is checked at
# a later state.
plural_expr = None
plural_expr_assignment = None
variables = {}
while parser.stream.current.type != 'block_end':
if variables:
parser.stream.expect('comma')
# skip colon for python compatibility
if parser.stream.skip_if('colon'):
break
name = parser.stream.expect('name')
if name.value in variables:
parser.fail('translatable variable %r defined twice.' %
name.value, name.lineno,
exc=TemplateAssertionError)
# expressions
if parser.stream.current.type == 'assign':
next(parser.stream)
variables[name.value] = var = parser.parse_expression()
else:
variables[name.value] = var = nodes.Name(name.value, 'load')
if plural_expr is None:
if isinstance(var, nodes.Call):
plural_expr = nodes.Name('_trans', 'load')
variables[name.value] = plural_expr
plural_expr_assignment = nodes.Assign(
nodes.Name('_trans', 'store'), var)
else:
plural_expr = var
num_called_num = name.value == 'num'
parser.stream.expect('block_end')
plural = plural_names = None
have_plural = False
referenced = set()
# now parse until endtrans or pluralize
singular_names, singular = self._parse_block(parser, True)
if singular_names:
referenced.update(singular_names)
if plural_expr is None:
plural_expr = nodes.Name(singular_names[0], 'load')
num_called_num = singular_names[0] == 'num'
# if we have a pluralize block, we parse that too
if parser.stream.current.test('name:pluralize'):
have_plural = True
next(parser.stream)
if parser.stream.current.type != 'block_end':
name = parser.stream.expect('name')
if name.value not in variables:
parser.fail('unknown variable %r for pluralization' %
name.value, name.lineno,
exc=TemplateAssertionError)
plural_expr = variables[name.value]
num_called_num = name.value == 'num'
parser.stream.expect('block_end')
plural_names, plural = self._parse_block(parser, False)
next(parser.stream)
referenced.update(plural_names)
else:
next(parser.stream)
# register free names as simple name expressions
for var in referenced:
if var not in variables:
variables[var] = nodes.Name(var, 'load')
if not have_plural:
plural_expr = None
elif plural_expr is None:
parser.fail('pluralize without variables', lineno)
node = self._make_node(singular, plural, variables, plural_expr,
bool(referenced),
num_called_num and have_plural)
node.set_lineno(lineno)
if plural_expr_assignment is not None:
return [plural_expr_assignment, node]
else:
return node
def _parse_block(self, parser, allow_pluralize):
"""Parse until the next block tag with a given name."""
referenced = []
buf = []
while 1:
if parser.stream.current.type == 'data':
buf.append(parser.stream.current.value.replace('%', '%%'))
next(parser.stream)
elif parser.stream.current.type == 'variable_begin':
next(parser.stream)
name = parser.stream.expect('name').value
referenced.append(name)
buf.append('%%(%s)s' % name)
parser.stream.expect('variable_end')
elif parser.stream.current.type == 'block_begin':
next(parser.stream)
if parser.stream.current.test('name:endtrans'):
break
elif parser.stream.current.test('name:pluralize'):
if allow_pluralize:
break
parser.fail('a translatable section can have only one '
'pluralize section')
parser.fail('control structures in translatable sections are '
'not allowed')
elif parser.stream.eos:
parser.fail('unclosed translation block')
else:
assert False, 'internal parser error'
return referenced, concat(buf)
def _make_node(self, singular, plural, variables, plural_expr,
vars_referenced, num_called_num):
"""Generates a useful node from the data provided."""
# no variables referenced? no need to escape for old style
# gettext invocations only if there are vars.
if not vars_referenced and not self.environment.newstyle_gettext:
singular = singular.replace('%%', '%')
if plural:
plural = plural.replace('%%', '%')
# singular only:
if plural_expr is None:
gettext = nodes.Name('gettext', 'load')
node = nodes.Call(gettext, [nodes.Const(singular)],
[], None, None)
# singular and plural
else:
ngettext = nodes.Name('ngettext', 'load')
node = nodes.Call(ngettext, [
nodes.Const(singular),
nodes.Const(plural),
plural_expr
], [], None, None)
# in case newstyle gettext is used, the method is powerful
# enough to handle the variable expansion and autoescape
# handling itself
if self.environment.newstyle_gettext:
for key, value in iteritems(variables):
# the function adds that later anyways in case num was
# called num, so just skip it.
if num_called_num and key == 'num':
continue
node.kwargs.append(nodes.Keyword(key, value))
# otherwise do that here
else:
# mark the return value as safe if we are in an
# environment with autoescaping turned on
node = nodes.MarkSafeIfAutoescape(node)
if variables:
node = nodes.Mod(node, nodes.Dict([
nodes.Pair(nodes.Const(key), value)
for key, value in variables.items()
]))
return nodes.Output([node])
class ExprStmtExtension(Extension):
"""Adds a `do` tag to Jinja2 that works like the print statement just
that it doesn't print the return value.
"""
tags = set(['do'])
def parse(self, parser):
node = nodes.ExprStmt(lineno=next(parser.stream).lineno)
node.node = parser.parse_tuple()
return node
class LoopControlExtension(Extension):
"""Adds break and continue to the template engine."""
tags = set(['break', 'continue'])
def parse(self, parser):
token = next(parser.stream)
if token.value == 'break':
return nodes.Break(lineno=token.lineno)
return nodes.Continue(lineno=token.lineno)
class WithExtension(Extension):
"""Adds support for a django-like with block."""
tags = set(['with'])
def parse(self, parser):
node = nodes.Scope(lineno=next(parser.stream).lineno)
assignments = []
while parser.stream.current.type != 'block_end':
lineno = parser.stream.current.lineno
if assignments:
parser.stream.expect('comma')
target = parser.parse_assign_target()
parser.stream.expect('assign')
expr = parser.parse_expression()
assignments.append(nodes.Assign(target, expr, lineno=lineno))
node.body = assignments + \
list(parser.parse_statements(('name:endwith',),
drop_needle=True))
return node
class AutoEscapeExtension(Extension):
"""Changes auto escape rules for a scope."""
tags = set(['autoescape'])
def parse(self, parser):
node = nodes.ScopedEvalContextModifier(lineno=next(parser.stream).lineno)
node.options = [
nodes.Keyword('autoescape', parser.parse_expression())
]
node.body = parser.parse_statements(('name:endautoescape',),
drop_needle=True)
return nodes.Scope([node])
def extract_from_ast(node, gettext_functions=GETTEXT_FUNCTIONS,
babel_style=True):
"""Extract localizable strings from the given template node. Per
default this function returns matches in babel style that means non string
parameters as well as keyword arguments are returned as `None`. This
allows Babel to figure out what you really meant if you are using
gettext functions that allow keyword arguments for placeholder expansion.
If you don't want that behavior set the `babel_style` parameter to `False`
which causes only strings to be returned and parameters are always stored
in tuples. As a consequence invalid gettext calls (calls without a single
string parameter or string parameters after non-string parameters) are
skipped.
This example explains the behavior:
>>> from jinja2 import Environment
>>> env = Environment()
>>> node = env.parse('{{ (_("foo"), _(), ngettext("foo", "bar", 42)) }}')
>>> list(extract_from_ast(node))
[(1, '_', 'foo'), (1, '_', ()), (1, 'ngettext', ('foo', 'bar', None))]
>>> list(extract_from_ast(node, babel_style=False))
[(1, '_', ('foo',)), (1, 'ngettext', ('foo', 'bar'))]
For every string found this function yields a ``(lineno, function,
message)`` tuple, where:
* ``lineno`` is the number of the line on which the string was found,
* ``function`` is the name of the ``gettext`` function used (if the
string was extracted from embedded Python code), and
* ``message`` is the string itself (a ``unicode`` object, or a tuple
of ``unicode`` objects for functions with multiple string arguments).
This extraction function operates on the AST and is because of that unable
to extract any comments. For comment support you have to use the babel
extraction interface or extract comments yourself.
"""
for node in node.find_all(nodes.Call):
if not isinstance(node.node, nodes.Name) or \
node.node.name not in gettext_functions:
continue
strings = []
for arg in node.args:
if isinstance(arg, nodes.Const) and \
isinstance(arg.value, string_types):
strings.append(arg.value)
else:
strings.append(None)
for arg in node.kwargs:
strings.append(None)
if node.dyn_args is not None:
strings.append(None)
if node.dyn_kwargs is not None:
strings.append(None)
if not babel_style:
strings = tuple(x for x in strings if x is not None)
if not strings:
continue
else:
if len(strings) == 1:
strings = strings[0]
else:
strings = tuple(strings)
yield node.lineno, node.node.name, strings
class _CommentFinder(object):
"""Helper class to find comments in a token stream. Can only
find comments for gettext calls forwards. Once the comment
from line 4 is found, a comment for line 1 will not return a
usable value.
"""
def __init__(self, tokens, comment_tags):
self.tokens = tokens
self.comment_tags = comment_tags
self.offset = 0
self.last_lineno = 0
def find_backwards(self, offset):
try:
for _, token_type, token_value in \
reversed(self.tokens[self.offset:offset]):
if token_type in ('comment', 'linecomment'):
try:
prefix, comment = token_value.split(None, 1)
except ValueError:
continue
if prefix in self.comment_tags:
return [comment.rstrip()]
return []
finally:
self.offset = offset
def find_comments(self, lineno):
if not self.comment_tags or self.last_lineno > lineno:
return []
for idx, (token_lineno, _, _) in enumerate(self.tokens[self.offset:]):
if token_lineno > lineno:
return self.find_backwards(self.offset + idx)
return self.find_backwards(len(self.tokens))
def babel_extract(fileobj, keywords, comment_tags, options):
"""Babel extraction method for Jinja templates.
.. versionchanged:: 2.3
Basic support for translation comments was added. If `comment_tags`
is now set to a list of keywords for extraction, the extractor will
try to find the best preceeding comment that begins with one of the
keywords. For best results, make sure to not have more than one
gettext call in one line of code and the matching comment in the
same line or the line before.
.. versionchanged:: 2.5.1
The `newstyle_gettext` flag can be set to `True` to enable newstyle
gettext calls.
.. versionchanged:: 2.7
A `silent` option can now be provided. If set to `False` template
syntax errors are propagated instead of being ignored.
:param fileobj: the file-like object the messages should be extracted from
:param keywords: a list of keywords (i.e. function names) that should be
recognized as translation functions
:param comment_tags: a list of translator tags to search for and include
in the results.
:param options: a dictionary of additional options (optional)
:return: an iterator over ``(lineno, funcname, message, comments)`` tuples.
(comments will be empty currently)
"""
extensions = set()
for extension in options.get('extensions', '').split(','):
extension = extension.strip()
if not extension:
continue
extensions.add(import_string(extension))
if InternationalizationExtension not in extensions:
extensions.add(InternationalizationExtension)
def getbool(options, key, default=False):
return options.get(key, str(default)).lower() in \
('1', 'on', 'yes', 'true')
silent = getbool(options, 'silent', True)
environment = Environment(
options.get('block_start_string', BLOCK_START_STRING),
options.get('block_end_string', BLOCK_END_STRING),
options.get('variable_start_string', VARIABLE_START_STRING),
options.get('variable_end_string', VARIABLE_END_STRING),
options.get('comment_start_string', COMMENT_START_STRING),
options.get('comment_end_string', COMMENT_END_STRING),
options.get('line_statement_prefix') or LINE_STATEMENT_PREFIX,
options.get('line_comment_prefix') or LINE_COMMENT_PREFIX,
getbool(options, 'trim_blocks', TRIM_BLOCKS),
getbool(options, 'lstrip_blocks', LSTRIP_BLOCKS),
NEWLINE_SEQUENCE,
getbool(options, 'keep_trailing_newline', KEEP_TRAILING_NEWLINE),
frozenset(extensions),
cache_size=0,
auto_reload=False
)
if getbool(options, 'newstyle_gettext'):
environment.newstyle_gettext = True
source = fileobj.read().decode(options.get('encoding', 'utf-8'))
try:
node = environment.parse(source)
tokens = list(environment.lex(environment.preprocess(source)))
except TemplateSyntaxError as e:
if not silent:
raise
# skip templates with syntax errors
return
finder = _CommentFinder(tokens, comment_tags)
for lineno, func, message in extract_from_ast(node, keywords):
yield lineno, func, message, finder.find_comments(lineno)
#: nicer import names
i18n = InternationalizationExtension
do = ExprStmtExtension
loopcontrols = LoopControlExtension
with_ = WithExtension
autoescape = AutoEscapeExtension

987
3rdparty/jinja2/filters.py vendored
Unescape View File

@ -1,987 +0,0 @@
# -*- coding: utf-8 -*-
"""
jinja2.filters
~~~~~~~~~~~~~~
Bundled jinja filters.
:copyright: (c) 2010 by the Jinja Team.
:license: BSD, see LICENSE for more details.
"""
import re
import math
from random import choice
from operator import itemgetter
from itertools import groupby
from jinja2.utils import Markup, escape, pformat, urlize, soft_unicode, \
unicode_urlencode
from jinja2.runtime import Undefined
from jinja2.exceptions import FilterArgumentError
from jinja2._compat import next, imap, string_types, text_type, iteritems
_word_re = re.compile(r'\w+(?u)')
def contextfilter(f):
"""Decorator for marking context dependent filters. The current
:class:`Context` will be passed as first argument.
"""
f.contextfilter = True
return f
def evalcontextfilter(f):
"""Decorator for marking eval-context dependent filters. An eval
context object is passed as first argument. For more information
about the eval context, see :ref:`eval-context`.
.. versionadded:: 2.4
"""
f.evalcontextfilter = True
return f
def environmentfilter(f):
"""Decorator for marking evironment dependent filters. The current
:class:`Environment` is passed to the filter as first argument.
"""
f.environmentfilter = True
return f
def make_attrgetter(environment, attribute):
"""Returns a callable that looks up the given attribute from a
passed object with the rules of the environment. Dots are allowed
to access attributes of attributes. Integer parts in paths are
looked up as integers.
"""
if not isinstance(attribute, string_types) \
or ('.' not in attribute and not attribute.isdigit()):
return lambda x: environment.getitem(x, attribute)
attribute = attribute.split('.')
def attrgetter(item):
for part in attribute:
if part.isdigit():
part = int(part)
item = environment.getitem(item, part)
return item
return attrgetter
def do_forceescape(value):
"""Enforce HTML escaping. This will probably double escape variables."""
if hasattr(value, '__html__'):
value = value.__html__()
return escape(text_type(value))
def do_urlencode(value):
"""Escape strings for use in URLs (uses UTF-8 encoding). It accepts both
dictionaries and regular strings as well as pairwise iterables.
.. versionadded:: 2.7
"""
itemiter = None
if isinstance(value, dict):
itemiter = iteritems(value)
elif not isinstance(value, string_types):
try:
itemiter = iter(value)
except TypeError:
pass
if itemiter is None:
return unicode_urlencode(value)
return u'&'.join(unicode_urlencode(k) + '=' +
unicode_urlencode(v) for k, v in itemiter)
@evalcontextfilter
def do_replace(eval_ctx, s, old, new, count=None):
"""Return a copy of the value with all occurrences of a substring
replaced with a new one. The first argument is the substring
that should be replaced, the second is the replacement string.
If the optional third argument ``count`` is given, only the first
``count`` occurrences are replaced:
.. sourcecode:: jinja
{{ "Hello World"|replace("Hello", "Goodbye") }}
-> Goodbye World
{{ "aaaaargh"|replace("a", "d'oh, ", 2) }}
-> d'oh, d'oh, aaargh
"""
if count is None:
count = -1
if not eval_ctx.autoescape:
return text_type(s).replace(text_type(old), text_type(new), count)
if hasattr(old, '__html__') or hasattr(new, '__html__') and \
not hasattr(s, '__html__'):
s = escape(s)
else:
s = soft_unicode(s)
return s.replace(soft_unicode(old), soft_unicode(new), count)
def do_upper(s):
"""Convert a value to uppercase."""
return soft_unicode(s).upper()
def do_lower(s):
"""Convert a value to lowercase."""
return soft_unicode(s).lower()
@evalcontextfilter
def do_xmlattr(_eval_ctx, d, autospace=True):
"""Create an SGML/XML attribute string based on the items in a dict.
All values that are neither `none` nor `undefined` are automatically
escaped:
.. sourcecode:: html+jinja
<ul{{ {'class': 'my_list', 'missing': none,
'id': 'list-%d'|format(variable)}|xmlattr }}>
...
</ul>
Results in something like this:
.. sourcecode:: html
<ul class="my_list" id="list-42">
...
</ul>
As you can see it automatically prepends a space in front of the item
if the filter returned something unless the second parameter is false.
"""
rv = u' '.join(
u'%s="%s"' % (escape(key), escape(value))
for key, value in iteritems(d)
if value is not None and not isinstance(value, Undefined)
)
if autospace and rv:
rv = u' ' + rv
if _eval_ctx.autoescape:
rv = Markup(rv)
return rv
def do_capitalize(s):
"""Capitalize a value. The first character will be uppercase, all others
lowercase.
"""
return soft_unicode(s).capitalize()
def do_title(s):
"""Return a titlecased version of the value. I.e. words will start with
uppercase letters, all remaining characters are lowercase.
"""
rv = []
for item in re.compile(r'([-\s]+)(?u)').split(s):
if not item:
continue
rv.append(item[0].upper() + item[1:].lower())
return ''.join(rv)
def do_dictsort(value, case_sensitive=False, by='key'):
"""Sort a dict and yield (key, value) pairs. Because python dicts are
unsorted you may want to use this function to order them by either
key or value:
.. sourcecode:: jinja
{% for item in mydict|dictsort %}
sort the dict by key, case insensitive
{% for item in mydict|dictsort(true) %}
sort the dict by key, case sensitive
{% for item in mydict|dictsort(false, 'value') %}
sort the dict by key, case insensitive, sorted
normally and ordered by value.
"""
if by == 'key':
pos = 0
elif by == 'value':
pos = 1
else:
raise FilterArgumentError('You can only sort by either '
'"key" or "value"')
def sort_func(item):
value = item[pos]
if isinstance(value, string_types) and not case_sensitive:
value = value.lower()
return value
return sorted(value.items(), key=sort_func)
@environmentfilter
def do_sort(environment, value, reverse=False, case_sensitive=False,
attribute=None):
"""Sort an iterable. Per default it sorts ascending, if you pass it
true as first argument it will reverse the sorting.
If the iterable is made of strings the third parameter can be used to
control the case sensitiveness of the comparison which is disabled by
default.
.. sourcecode:: jinja
{% for item in iterable|sort %}
...
{% endfor %}
It is also possible to sort by an attribute (for example to sort
by the date of an object) by specifying the `attribute` parameter:
.. sourcecode:: jinja
{% for item in iterable|sort(attribute='date') %}
...
{% endfor %}
.. versionchanged:: 2.6
The `attribute` parameter was added.
"""
if not case_sensitive:
def sort_func(item):
if isinstance(item, string_types):
item = item.lower()
return item
else:
sort_func = None
if attribute is not None:
getter = make_attrgetter(environment, attribute)
def sort_func(item, processor=sort_func or (lambda x: x)):
return processor(getter(item))
return sorted(value, key=sort_func, reverse=reverse)
def do_default(value, default_value=u'', boolean=False):
"""If the value is undefined it will return the passed default value,
otherwise the value of the variable:
.. sourcecode:: jinja
{{ my_variable|default('my_variable is not defined') }}
This will output the value of ``my_variable`` if the variable was
defined, otherwise ``'my_variable is not defined'``. If you want
to use default with variables that evaluate to false you have to
set the second parameter to `true`:
.. sourcecode:: jinja
{{ ''|default('the string was empty', true) }}
"""
if isinstance(value, Undefined) or (boolean and not value):
return default_value
return value
@evalcontextfilter
def do_join(eval_ctx, value, d=u'', attribute=None):
"""Return a string which is the concatenation of the strings in the
sequence. The separator between elements is an empty string per
default, you can define it with the optional parameter:
.. sourcecode:: jinja
{{ [1, 2, 3]|join('|') }}
-> 1|2|3
{{ [1, 2, 3]|join }}
-> 123
It is also possible to join certain attributes of an object:
.. sourcecode:: jinja
{{ users|join(', ', attribute='username') }}
.. versionadded:: 2.6
The `attribute` parameter was added.
"""
if attribute is not None:
value = imap(make_attrgetter(eval_ctx.environment, attribute), value)
# no automatic escaping? joining is a lot eaiser then
if not eval_ctx.autoescape:
return text_type(d).join(imap(text_type, value))
# if the delimiter doesn't have an html representation we check
# if any of the items has. If yes we do a coercion to Markup
if not hasattr(d, '__html__'):
value = list(value)
do_escape = False
for idx, item in enumerate(value):
if hasattr(item, '__html__'):
do_escape = True
else:
value[idx] = text_type(item)
if do_escape:
d = escape(d)
else:
d = text_type(d)
return d.join(value)
# no html involved, to normal joining
return soft_unicode(d).join(imap(soft_unicode, value))
def do_center(value, width=80):
"""Centers the value in a field of a given width."""
return text_type(value).center(width)
@environmentfilter
def do_first(environment, seq):
"""Return the first item of a sequence."""
try:
return next(iter(seq))
except StopIteration:
return environment.undefined('No first item, sequence was empty.')
@environmentfilter
def do_last(environment, seq):
"""Return the last item of a sequence."""
try:
return next(iter(reversed(seq)))
except StopIteration:
return environment.undefined('No last item, sequence was empty.')
@environmentfilter
def do_random(environment, seq):
"""Return a random item from the sequence."""
try:
return choice(seq)
except IndexError:
return environment.undefined('No random item, sequence was empty.')
def do_filesizeformat(value, binary=False):
"""Format the value like a 'human-readable' file size (i.e. 13 kB,
4.1 MB, 102 Bytes, etc). Per default decimal prefixes are used (Mega,
Giga, etc.), if the second parameter is set to `True` the binary
prefixes are used (Mebi, Gibi).
"""
bytes = float(value)
base = binary and 1024 or 1000
prefixes = [
(binary and 'KiB' or 'kB'),
(binary and 'MiB' or 'MB'),
(binary and 'GiB' or 'GB'),
(binary and 'TiB' or 'TB'),
(binary and 'PiB' or 'PB'),
(binary and 'EiB' or 'EB'),
(binary and 'ZiB' or 'ZB'),
(binary and 'YiB' or 'YB')
]
if bytes == 1:
return '1 Byte'
elif bytes < base:
return '%d Bytes' % bytes
else:
for i, prefix in enumerate(prefixes):
unit = base ** (i + 2)
if bytes < unit:
return '%.1f %s' % ((base * bytes / unit), prefix)
return '%.1f %s' % ((base * bytes / unit), prefix)
def do_pprint(value, verbose=False):
"""Pretty print a variable. Useful for debugging.
With Jinja 1.2 onwards you can pass it a parameter. If this parameter
is truthy the output will be more verbose (this requires `pretty`)
"""
return pformat(value, verbose=verbose)
@evalcontextfilter
def do_urlize(eval_ctx, value, trim_url_limit=None, nofollow=False):
"""Converts URLs in plain text into clickable links.
If you pass the filter an additional integer it will shorten the urls
to that number. Also a third argument exists that makes the urls
"nofollow":
.. sourcecode:: jinja
{{ mytext|urlize(40, true) }}
links are shortened to 40 chars and defined with rel="nofollow"
"""
rv = urlize(value, trim_url_limit, nofollow)
if eval_ctx.autoescape:
rv = Markup(rv)
return rv
def do_indent(s, width=4, indentfirst=False):
"""Return a copy of the passed string, each line indented by
4 spaces. The first line is not indented. If you want to
change the number of spaces or indent the first line too
you can pass additional parameters to the filter:
.. sourcecode:: jinja
{{ mytext|indent(2, true) }}
indent by two spaces and indent the first line too.
"""
indention = u' ' * width
rv = (u'\n' + indention).join(s.splitlines())
if indentfirst:
rv = indention + rv
return rv
def do_truncate(s, length=255, killwords=False, end='...'):
"""Return a truncated copy of the string. The length is specified
with the first parameter which defaults to ``255``. If the second
parameter is ``true`` the filter will cut the text at length. Otherwise
it will discard the last word. If the text was in fact
truncated it will append an ellipsis sign (``"..."``). If you want a
different ellipsis sign than ``"..."`` you can specify it using the
third parameter.
.. sourcecode:: jinja
{{ "foo bar"|truncate(5) }}
-> "foo ..."
{{ "foo bar"|truncate(5, True) }}
-> "foo b..."
"""
if len(s) <= length:
return s
elif killwords:
return s[:length] + end
words = s.split(' ')
result = []
m = 0
for word in words:
m += len(word) + 1
if m > length:
break
result.append(word)
result.append(end)
return u' '.join(result)
@environmentfilter
def do_wordwrap(environment, s, width=79, break_long_words=True,
wrapstring=None):
"""
Return a copy of the string passed to the filter wrapped after
``79`` characters. You can override this default using the first
parameter. If you set the second parameter to `false` Jinja will not
split words apart if they are longer than `width`. By default, the newlines
will be the default newlines for the environment, but this can be changed
using the wrapstring keyword argument.
.. versionadded:: 2.7
Added support for the `wrapstring` parameter.
"""
if not wrapstring:
wrapstring = environment.newline_sequence
import textwrap
return wrapstring.join(textwrap.wrap(s, width=width, expand_tabs=False,
replace_whitespace=False,
break_long_words=break_long_words))
def do_wordcount(s):
"""Count the words in that string."""
return len(_word_re.findall(s))
def do_int(value, default=0):
"""Convert the value into an integer. If the
conversion doesn't work it will return ``0``. You can
override this default using the first parameter.
"""
try:
return int(value)
except (TypeError, ValueError):
# this quirk is necessary so that "42.23"|int gives 42.
try:
return int(float(value))
except (TypeError, ValueError):
return default
def do_float(value, default=0.0):
"""Convert the value into a floating point number. If the
conversion doesn't work it will return ``0.0``. You can
override this default using the first parameter.
"""
try:
return float(value)
except (TypeError, ValueError):
return default
def do_format(value, *args, **kwargs):
"""
Apply python string formatting on an object:
.. sourcecode:: jinja
{{ "%s - %s"|format("Hello?", "Foo!") }}
-> Hello? - Foo!
"""
if args and kwargs:
raise FilterArgumentError('can\'t handle positional and keyword '
'arguments at the same time')
return soft_unicode(value) % (kwargs or args)
def do_trim(value):
"""Strip leading and trailing whitespace."""
return soft_unicode(value).strip()
def do_striptags(value):
"""Strip SGML/XML tags and replace adjacent whitespace by one space.
"""
if hasattr(value, '__html__'):
value = value.__html__()
return Markup(text_type(value)).striptags()
def do_slice(value, slices, fill_with=None):
"""Slice an iterator and return a list of lists containing
those items. Useful if you want to create a div containing
three ul tags that represent columns:
.. sourcecode:: html+jinja
<div class="columwrapper">
{%- for column in items|slice(3) %}
<ul class="column-{{ loop.index }}">
{%- for item in column %}
<li>{{ item }}</li>
{%- endfor %}
</ul>
{%- endfor %}
</div>
If you pass it a second argument it's used to fill missing
values on the last iteration.
"""
seq = list(value)
length = len(seq)
items_per_slice = length // slices
slices_with_extra = length % slices
offset = 0
for slice_number in range(slices):
start = offset + slice_number * items_per_slice
if slice_number < slices_with_extra:
offset += 1
end = offset + (slice_number + 1) * items_per_slice
tmp = seq[start:end]
if fill_with is not None and slice_number >= slices_with_extra:
tmp.append(fill_with)
yield tmp
def do_batch(value, linecount, fill_with=None):
"""
A filter that batches items. It works pretty much like `slice`
just the other way round. It returns a list of lists with the
given number of items. If you provide a second parameter this
is used to fill up missing items. See this example:
.. sourcecode:: html+jinja
<table>
{%- for row in items|batch(3, '&nbsp;') %}
<tr>
{%- for column in row %}
<td>{{ column }}</td>
{%- endfor %}
</tr>
{%- endfor %}
</table>
"""
result = []
tmp = []
for item in value:
if len(tmp) == linecount:
yield tmp
tmp = []
tmp.append(item)
if tmp:
if fill_with is not None and len(tmp) < linecount:
tmp += [fill_with] * (linecount - len(tmp))
yield tmp
def do_round(value, precision=0, method='common'):
"""Round the number to a given precision. The first
parameter specifies the precision (default is ``0``), the
second the rounding method:
- ``'common'`` rounds either up or down
- ``'ceil'`` always rounds up
- ``'floor'`` always rounds down
If you don't specify a method ``'common'`` is used.
.. sourcecode:: jinja
{{ 42.55|round }}
-> 43.0
{{ 42.55|round(1, 'floor') }}
-> 42.5
Note that even if rounded to 0 precision, a float is returned. If
you need a real integer, pipe it through `int`:
.. sourcecode:: jinja
{{ 42.55|round|int }}
-> 43
"""
if not method in ('common', 'ceil', 'floor'):
raise FilterArgumentError('method must be common, ceil or floor')
if method == 'common':
return round(value, precision)
func = getattr(math, method)
return func(value * (10 ** precision)) / (10 ** precision)
@environmentfilter
def do_groupby(environment, value, attribute):
"""Group a sequence of objects by a common attribute.
If you for example have a list of dicts or objects that represent persons
with `gender`, `first_name` and `last_name` attributes and you want to
group all users by genders you can do something like the following
snippet:
.. sourcecode:: html+jinja
<ul>
{% for group in persons|groupby('gender') %}
<li>{{ group.grouper }}<ul>
{% for person in group.list %}
<li>{{ person.first_name }} {{ person.last_name }}</li>
{% endfor %}</ul></li>
{% endfor %}
</ul>
Additionally it's possible to use tuple unpacking for the grouper and
list:
.. sourcecode:: html+jinja
<ul>
{% for grouper, list in persons|groupby('gender') %}
...
{% endfor %}
</ul>
As you can see the item we're grouping by is stored in the `grouper`
attribute and the `list` contains all the objects that have this grouper
in common.
.. versionchanged:: 2.6
It's now possible to use dotted notation to group by the child
attribute of another attribute.
"""
expr = make_attrgetter(environment, attribute)
return sorted(map(_GroupTuple, groupby(sorted(value, key=expr), expr)))
class _GroupTuple(tuple):
__slots__ = ()
grouper = property(itemgetter(0))
list = property(itemgetter(1))
def __new__(cls, xxx_todo_changeme):
(key, value) = xxx_todo_changeme
return tuple.__new__(cls, (key, list(value)))
@environmentfilter
def do_sum(environment, iterable, attribute=None, start=0):
"""Returns the sum of a sequence of numbers plus the value of parameter
'start' (which defaults to 0). When the sequence is empty it returns
start.
It is also possible to sum up only certain attributes:
.. sourcecode:: jinja
Total: {{ items|sum(attribute='price') }}
.. versionchanged:: 2.6
The `attribute` parameter was added to allow suming up over
attributes. Also the `start` parameter was moved on to the right.
"""
if attribute is not None:
iterable = imap(make_attrgetter(environment, attribute), iterable)
return sum(iterable, start)
def do_list(value):
"""Convert the value into a list. If it was a string the returned list
will be a list of characters.
"""
return list(value)
def do_mark_safe(value):
"""Mark the value as safe which means that in an environment with automatic
escaping enabled this variable will not be escaped.
"""
return Markup(value)
def do_mark_unsafe(value):
"""Mark a value as unsafe. This is the reverse operation for :func:`safe`."""
return text_type(value)
def do_reverse(value):
"""Reverse the object or return an iterator the iterates over it the other
way round.
"""
if isinstance(value, string_types):
return value[::-1]
try:
return reversed(value)
except TypeError:
try:
rv = list(value)
rv.reverse()
return rv
except TypeError:
raise FilterArgumentError('argument must be iterable')
@environmentfilter
def do_attr(environment, obj, name):
"""Get an attribute of an object. ``foo|attr("bar")`` works like
``foo["bar"]`` just that always an attribute is returned and items are not
looked up.
See :ref:`Notes on subscriptions <notes-on-subscriptions>` for more details.
"""
try:
name = str(name)
except UnicodeError:
pass
else:
try:
value = getattr(obj, name)
except AttributeError:
pass
else:
if environment.sandboxed and not \
environment.is_safe_attribute(obj, name, value):
return environment.unsafe_undefined(obj, name)
return value
return environment.undefined(obj=obj, name=name)
@contextfilter
def do_map(*args, **kwargs):
"""Applies a filter on a sequence of objects or looks up an attribute.
This is useful when dealing with lists of objects but you are really
only interested in a certain value of it.
The basic usage is mapping on an attribute. Imagine you have a list
of users but you are only interested in a list of usernames:
.. sourcecode:: jinja
Users on this page: {{ users|map(attribute='username')|join(', ') }}
Alternatively you can let it invoke a filter by passing the name of the
filter and the arguments afterwards. A good example would be applying a
text conversion filter on a sequence:
.. sourcecode:: jinja
Users on this page: {{ titles|map('lower')|join(', ') }}
.. versionadded:: 2.7
"""
context = args[0]
seq = args[1]
if len(args) == 2 and 'attribute' in kwargs:
attribute = kwargs.pop('attribute')
if kwargs:
raise FilterArgumentError('Unexpected keyword argument %r' %
next(iter(kwargs)))
func = make_attrgetter(context.environment, attribute)
else:
try:
name = args[2]
args = args[3:]
except LookupError:
raise FilterArgumentError('map requires a filter argument')
func = lambda item: context.environment.call_filter(
name, item, args, kwargs, context=context)
if seq:
for item in seq:
yield func(item)
@contextfilter
def do_select(*args, **kwargs):
"""Filters a sequence of objects by appying a test to either the object
or the attribute and only selecting the ones with the test succeeding.
Example usage:
.. sourcecode:: jinja
{{ numbers|select("odd") }}
.. versionadded:: 2.7
"""
return _select_or_reject(args, kwargs, lambda x: x, False)
@contextfilter
def do_reject(*args, **kwargs):
"""Filters a sequence of objects by appying a test to either the object
or the attribute and rejecting the ones with the test succeeding.
Example usage:
.. sourcecode:: jinja
{{ numbers|reject("odd") }}
.. versionadded:: 2.7
"""
return _select_or_reject(args, kwargs, lambda x: not x, False)
@contextfilter
def do_selectattr(*args, **kwargs):
"""Filters a sequence of objects by appying a test to either the object
or the attribute and only selecting the ones with the test succeeding.
Example usage:
.. sourcecode:: jinja
{{ users|selectattr("is_active") }}
{{ users|selectattr("email", "none") }}
.. versionadded:: 2.7
"""
return _select_or_reject(args, kwargs, lambda x: x, True)
@contextfilter
def do_rejectattr(*args, **kwargs):
"""Filters a sequence of objects by appying a test to either the object
or the attribute and rejecting the ones with the test succeeding.
.. sourcecode:: jinja
{{ users|rejectattr("is_active") }}
{{ users|rejectattr("email", "none") }}
.. versionadded:: 2.7
"""
return _select_or_reject(args, kwargs, lambda x: not x, True)
def _select_or_reject(args, kwargs, modfunc, lookup_attr):
context = args[0]
seq = args[1]
if lookup_attr:
try:
attr = args[2]
except LookupError:
raise FilterArgumentError('Missing parameter for attribute name')
transfunc = make_attrgetter(context.environment, attr)
off = 1
else:
off = 0
transfunc = lambda x: x
try:
name = args[2 + off]
args = args[3 + off:]
func = lambda item: context.environment.call_test(
name, item, args, kwargs)
except LookupError:
func = bool
if seq:
for item in seq:
if modfunc(func(transfunc(item))):
yield item
FILTERS = {
'attr': do_attr,
'replace': do_replace,
'upper': do_upper,
'lower': do_lower,
'escape': escape,
'e': escape,
'forceescape': do_forceescape,
'capitalize': do_capitalize,
'title': do_title,
'default': do_default,
'd': do_default,
'join': do_join,
'count': len,
'dictsort': do_dictsort,
'sort': do_sort,
'length': len,
'reverse': do_reverse,
'center': do_center,
'indent': do_indent,
'title': do_title,
'capitalize': do_capitalize,
'first': do_first,
'last': do_last,
'map': do_map,
'random': do_random,
'reject': do_reject,
'rejectattr': do_rejectattr,
'filesizeformat': do_filesizeformat,
'pprint': do_pprint,
'truncate': do_truncate,
'wordwrap': do_wordwrap,
'wordcount': do_wordcount,
'int': do_int,
'float': do_float,
'string': soft_unicode,
'list': do_list,
'urlize': do_urlize,
'format': do_format,
'trim': do_trim,
'striptags': do_striptags,
'select': do_select,
'selectattr': do_selectattr,
'slice': do_slice,
'batch': do_batch,
'sum': do_sum,
'abs': abs,
'round': do_round,
'groupby': do_groupby,
'safe': do_mark_safe,
'xmlattr': do_xmlattr,
'urlencode': do_urlencode
}

733
3rdparty/jinja2/lexer.py vendored
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@ -1,733 +0,0 @@
# -*- coding: utf-8 -*-
"""
jinja2.lexer
~~~~~~~~~~~~
This module implements a Jinja / Python combination lexer. The
`Lexer` class provided by this module is used to do some preprocessing
for Jinja.
On the one hand it filters out invalid operators like the bitshift
operators we don't allow in templates. On the other hand it separates
template code and python code in expressions.
:copyright: (c) 2010 by the Jinja Team.
:license: BSD, see LICENSE for more details.
"""
import re
from operator import itemgetter
from collections import deque
from jinja2.exceptions import TemplateSyntaxError
from jinja2.utils import LRUCache
from jinja2._compat import next, iteritems, implements_iterator, text_type, \
intern
# cache for the lexers. Exists in order to be able to have multiple
# environments with the same lexer
_lexer_cache = LRUCache(50)
# static regular expressions
whitespace_re = re.compile(r'\s+', re.U)
string_re = re.compile(r"('([^'\\]*(?:\\.[^'\\]*)*)'"
r'|"([^"\\]*(?:\\.[^"\\]*)*)")', re.S)
integer_re = re.compile(r'\d+')
# we use the unicode identifier rule if this python version is able
# to handle unicode identifiers, otherwise the standard ASCII one.
try:
compile('föö', '<unknown>', 'eval')
except SyntaxError:
name_re = re.compile(r'\b[a-zA-Z_][a-zA-Z0-9_]*\b')
else:
from jinja2 import _stringdefs
name_re = re.compile(r'[%s][%s]*' % (_stringdefs.xid_start,
_stringdefs.xid_continue))
float_re = re.compile(r'(?<!\.)\d+\.\d+')
newline_re = re.compile(r'(\r\n|\r|\n)')
# internal the tokens and keep references to them
TOKEN_ADD = intern('add')
TOKEN_ASSIGN = intern('assign')
TOKEN_COLON = intern('colon')
TOKEN_COMMA = intern('comma')
TOKEN_DIV = intern('div')
TOKEN_DOT = intern('dot')
TOKEN_EQ = intern('eq')
TOKEN_FLOORDIV = intern('floordiv')
TOKEN_GT = intern('gt')
TOKEN_GTEQ = intern('gteq')
TOKEN_LBRACE = intern('lbrace')
TOKEN_LBRACKET = intern('lbracket')
TOKEN_LPAREN = intern('lparen')
TOKEN_LT = intern('lt')
TOKEN_LTEQ = intern('lteq')
TOKEN_MOD = intern('mod')
TOKEN_MUL = intern('mul')
TOKEN_NE = intern('ne')
TOKEN_PIPE = intern('pipe')
TOKEN_POW = intern('pow')
TOKEN_RBRACE = intern('rbrace')
TOKEN_RBRACKET = intern('rbracket')
TOKEN_RPAREN = intern('rparen')
TOKEN_SEMICOLON = intern('semicolon')
TOKEN_SUB = intern('sub')
TOKEN_TILDE = intern('tilde')
TOKEN_WHITESPACE = intern('whitespace')
TOKEN_FLOAT = intern('float')
TOKEN_INTEGER = intern('integer')
TOKEN_NAME = intern('name')
TOKEN_STRING = intern('string')
TOKEN_OPERATOR = intern('operator')
TOKEN_BLOCK_BEGIN = intern('block_begin')
TOKEN_BLOCK_END = intern('block_end')
TOKEN_VARIABLE_BEGIN = intern('variable_begin')
TOKEN_VARIABLE_END = intern('variable_end')
TOKEN_RAW_BEGIN = intern('raw_begin')
TOKEN_RAW_END = intern('raw_end')
TOKEN_COMMENT_BEGIN = intern('comment_begin')
TOKEN_COMMENT_END = intern('comment_end')
TOKEN_COMMENT = intern('comment')
TOKEN_LINESTATEMENT_BEGIN = intern('linestatement_begin')
TOKEN_LINESTATEMENT_END = intern('linestatement_end')
TOKEN_LINECOMMENT_BEGIN = intern('linecomment_begin')
TOKEN_LINECOMMENT_END = intern('linecomment_end')
TOKEN_LINECOMMENT = intern('linecomment')
TOKEN_DATA = intern('data')
TOKEN_INITIAL = intern('initial')
TOKEN_EOF = intern('eof')
# bind operators to token types
operators = {
'+': TOKEN_ADD,
'-': TOKEN_SUB,
'/': TOKEN_DIV,
'//': TOKEN_FLOORDIV,
'*': TOKEN_MUL,
'%': TOKEN_MOD,
'**': TOKEN_POW,
'~': TOKEN_TILDE,
'[': TOKEN_LBRACKET,
']': TOKEN_RBRACKET,
'(': TOKEN_LPAREN,
')': TOKEN_RPAREN,
'{': TOKEN_LBRACE,
'}': TOKEN_RBRACE,
'==': TOKEN_EQ,
'!=': TOKEN_NE,
'>': TOKEN_GT,
'>=': TOKEN_GTEQ,
'<': TOKEN_LT,
'<=': TOKEN_LTEQ,
'=': TOKEN_ASSIGN,
'.': TOKEN_DOT,
':': TOKEN_COLON,
'|': TOKEN_PIPE,
',': TOKEN_COMMA,
';': TOKEN_SEMICOLON
}
reverse_operators = dict([(v, k) for k, v in iteritems(operators)])
assert len(operators) == len(reverse_operators), 'operators dropped'
operator_re = re.compile('(%s)' % '|'.join(re.escape(x) for x in
sorted(operators, key=lambda x: -len(x))))
ignored_tokens = frozenset([TOKEN_COMMENT_BEGIN, TOKEN_COMMENT,
TOKEN_COMMENT_END, TOKEN_WHITESPACE,
TOKEN_WHITESPACE, TOKEN_LINECOMMENT_BEGIN,
TOKEN_LINECOMMENT_END, TOKEN_LINECOMMENT])
ignore_if_empty = frozenset([TOKEN_WHITESPACE, TOKEN_DATA,
TOKEN_COMMENT, TOKEN_LINECOMMENT])
def _describe_token_type(token_type):
if token_type in reverse_operators:
return reverse_operators[token_type]
return {
TOKEN_COMMENT_BEGIN: 'begin of comment',
TOKEN_COMMENT_END: 'end of comment',
TOKEN_COMMENT: 'comment',
TOKEN_LINECOMMENT: 'comment',
TOKEN_BLOCK_BEGIN: 'begin of statement block',
TOKEN_BLOCK_END: 'end of statement block',
TOKEN_VARIABLE_BEGIN: 'begin of print statement',
TOKEN_VARIABLE_END: 'end of print statement',
TOKEN_LINESTATEMENT_BEGIN: 'begin of line statement',
TOKEN_LINESTATEMENT_END: 'end of line statement',
TOKEN_DATA: 'template data / text',
TOKEN_EOF: 'end of template'
}.get(token_type, token_type)
def describe_token(token):
"""Returns a description of the token."""
if token.type == 'name':
return token.value
return _describe_token_type(token.type)
def describe_token_expr(expr):
"""Like `describe_token` but for token expressions."""
if ':' in expr:
type, value = expr.split(':', 1)
if type == 'name':
return value
else:
type = expr
return _describe_token_type(type)
def count_newlines(value):
"""Count the number of newline characters in the string. This is
useful for extensions that filter a stream.
"""
return len(newline_re.findall(value))
def compile_rules(environment):
"""Compiles all the rules from the environment into a list of rules."""
e = re.escape
rules = [
(len(environment.comment_start_string), 'comment',
e(environment.comment_start_string)),
(len(environment.block_start_string), 'block',
e(environment.block_start_string)),
(len(environment.variable_start_string), 'variable',
e(environment.variable_start_string))
]
if environment.line_statement_prefix is not None:
rules.append((len(environment.line_statement_prefix), 'linestatement',
r'^[ \t\v]*' + e(environment.line_statement_prefix)))
if environment.line_comment_prefix is not None:
rules.append((len(environment.line_comment_prefix), 'linecomment',
r'(?:^|(?<=\S))[^\S\r\n]*' +
e(environment.line_comment_prefix)))
return [x[1:] for x in sorted(rules, reverse=True)]
class Failure(object):
"""Class that raises a `TemplateSyntaxError` if called.
Used by the `Lexer` to specify known errors.
"""
def __init__(self, message, cls=TemplateSyntaxError):
self.message = message
self.error_class = cls
def __call__(self, lineno, filename):
raise self.error_class(self.message, lineno, filename)
class Token(tuple):
"""Token class."""
__slots__ = ()
lineno, type, value = (property(itemgetter(x)) for x in range(3))
def __new__(cls, lineno, type, value):
return tuple.__new__(cls, (lineno, intern(str(type)), value))
def __str__(self):
if self.type in reverse_operators:
return reverse_operators[self.type]
elif self.type == 'name':
return self.value
return self.type
def test(self, expr):
"""Test a token against a token expression. This can either be a
token type or ``'token_type:token_value'``. This can only test
against string values and types.
"""
# here we do a regular string equality check as test_any is usually
# passed an iterable of not interned strings.
if self.type == expr:
return True
elif ':' in expr:
return expr.split(':', 1) == [self.type, self.value]
return False
def test_any(self, *iterable):
"""Test against multiple token expressions."""
for expr in iterable:
if self.test(expr):
return True
return False
def __repr__(self):
return 'Token(%r, %r, %r)' % (
self.lineno,
self.type,
self.value
)
@implements_iterator
class TokenStreamIterator(object):
"""The iterator for tokenstreams. Iterate over the stream
until the eof token is reached.
"""
def __init__(self, stream):
self.stream = stream
def __iter__(self):
return self
def __next__(self):
token = self.stream.current
if token.type is TOKEN_EOF:
self.stream.close()
raise StopIteration()
next(self.stream)
return token
@implements_iterator
class TokenStream(object):
"""A token stream is an iterable that yields :class:`Token`\s. The
parser however does not iterate over it but calls :meth:`next` to go
one token ahead. The current active token is stored as :attr:`current`.
"""
def __init__(self, generator, name, filename):
self._iter = iter(generator)
self._pushed = deque()
self.name = name
self.filename = filename
self.closed = False
self.current = Token(1, TOKEN_INITIAL, '')
next(self)
def __iter__(self):
return TokenStreamIterator(self)
def __bool__(self):
return bool(self._pushed) or self.current.type is not TOKEN_EOF
__nonzero__ = __bool__ # py2
eos = property(lambda x: not x, doc="Are we at the end of the stream?")
def push(self, token):
"""Push a token back to the stream."""
self._pushed.append(token)
def look(self):
"""Look at the next token."""
old_token = next(self)
result = self.current
self.push(result)
self.current = old_token
return result
def skip(self, n=1):
"""Got n tokens ahead."""
for x in range(n):
next(self)
def next_if(self, expr):
"""Perform the token test and return the token if it matched.
Otherwise the return value is `None`.
"""
if self.current.test(expr):
return next(self)
def skip_if(self, expr):
"""Like :meth:`next_if` but only returns `True` or `False`."""
return self.next_if(expr) is not None
def __next__(self):
"""Go one token ahead and return the old one"""
rv = self.current
if self._pushed:
self.current = self._pushed.popleft()
elif self.current.type is not TOKEN_EOF:
try:
self.current = next(self._iter)
except StopIteration:
self.close()
return rv
def close(self):
"""Close the stream."""
self.current = Token(self.current.lineno, TOKEN_EOF, '')
self._iter = None
self.closed = True
def expect(self, expr):
"""Expect a given token type and return it. This accepts the same
argument as :meth:`jinja2.lexer.Token.test`.
"""
if not self.current.test(expr):
expr = describe_token_expr(expr)
if self.current.type is TOKEN_EOF:
raise TemplateSyntaxError('unexpected end of template, '
'expected %r.' % expr,
self.current.lineno,
self.name, self.filename)
raise TemplateSyntaxError("expected token %r, got %r" %
(expr, describe_token(self.current)),
self.current.lineno,
self.name, self.filename)
try:
return self.current
finally:
next(self)
def get_lexer(environment):
"""Return a lexer which is probably cached."""
key = (environment.block_start_string,
environment.block_end_string,
environment.variable_start_string,
environment.variable_end_string,
environment.comment_start_string,
environment.comment_end_string,
environment.line_statement_prefix,
environment.line_comment_prefix,
environment.trim_blocks,
environment.lstrip_blocks,
environment.newline_sequence,
environment.keep_trailing_newline)
lexer = _lexer_cache.get(key)
if lexer is None:
lexer = Lexer(environment)
_lexer_cache[key] = lexer
return lexer
class Lexer(object):
"""Class that implements a lexer for a given environment. Automatically
created by the environment class, usually you don't have to do that.
Note that the lexer is not automatically bound to an environment.
Multiple environments can share the same lexer.
"""
def __init__(self, environment):
# shortcuts
c = lambda x: re.compile(x, re.M | re.S)
e = re.escape
# lexing rules for tags
tag_rules = [
(whitespace_re, TOKEN_WHITESPACE, None),
(float_re, TOKEN_FLOAT, None),
(integer_re, TOKEN_INTEGER, None),
(name_re, TOKEN_NAME, None),
(string_re, TOKEN_STRING, None),
(operator_re, TOKEN_OPERATOR, None)
]
# assemble the root lexing rule. because "|" is ungreedy
# we have to sort by length so that the lexer continues working
# as expected when we have parsing rules like <% for block and
# <%= for variables. (if someone wants asp like syntax)
# variables are just part of the rules if variable processing
# is required.
root_tag_rules = compile_rules(environment)
# block suffix if trimming is enabled
block_suffix_re = environment.trim_blocks and '\\n?' or ''
# strip leading spaces if lstrip_blocks is enabled
prefix_re = {}
if environment.lstrip_blocks:
# use '{%+' to manually disable lstrip_blocks behavior
no_lstrip_re = e('+')
# detect overlap between block and variable or comment strings
block_diff = c(r'^%s(.*)' % e(environment.block_start_string))
# make sure we don't mistake a block for a variable or a comment
m = block_diff.match(environment.comment_start_string)
no_lstrip_re += m and r'|%s' % e(m.group(1)) or ''
m = block_diff.match(environment.variable_start_string)
no_lstrip_re += m and r'|%s' % e(m.group(1)) or ''
# detect overlap between comment and variable strings
comment_diff = c(r'^%s(.*)' % e(environment.comment_start_string))
m = comment_diff.match(environment.variable_start_string)
no_variable_re = m and r'(?!%s)' % e(m.group(1)) or ''
lstrip_re = r'^[ \t]*'
block_prefix_re = r'%s%s(?!%s)|%s\+?' % (
lstrip_re,
e(environment.block_start_string),
no_lstrip_re,
e(environment.block_start_string),
)
comment_prefix_re = r'%s%s%s|%s\+?' % (
lstrip_re,
e(environment.comment_start_string),
no_variable_re,
e(environment.comment_start_string),
)
prefix_re['block'] = block_prefix_re
prefix_re['comment'] = comment_prefix_re
else:
block_prefix_re = '%s' % e(environment.block_start_string)
self.newline_sequence = environment.newline_sequence
self.keep_trailing_newline = environment.keep_trailing_newline
# global lexing rules
self.rules = {
'root': [
# directives
(c('(.*?)(?:%s)' % '|'.join(
[r'(?P<raw_begin>(?:\s*%s\-|%s)\s*raw\s*(?:\-%s\s*|%s))' % (
e(environment.block_start_string),
block_prefix_re,
e(environment.block_end_string),
e(environment.block_end_string)
)] + [
r'(?P<%s_begin>\s*%s\-|%s)' % (n, r, prefix_re.get(n,r))
for n, r in root_tag_rules
])), (TOKEN_DATA, '#bygroup'), '#bygroup'),
# data
(c('.+'), TOKEN_DATA, None)
],
# comments
TOKEN_COMMENT_BEGIN: [
(c(r'(.*?)((?:\-%s\s*|%s)%s)' % (
e(environment.comment_end_string),
e(environment.comment_end_string),
block_suffix_re
)), (TOKEN_COMMENT, TOKEN_COMMENT_END), '#pop'),
(c('(.)'), (Failure('Missing end of comment tag'),), None)
],
# blocks
TOKEN_BLOCK_BEGIN: [
(c('(?:\-%s\s*|%s)%s' % (
e(environment.block_end_string),
e(environment.block_end_string),
block_suffix_re
)), TOKEN_BLOCK_END, '#pop'),
] + tag_rules,
# variables
TOKEN_VARIABLE_BEGIN: [
(c('\-%s\s*|%s' % (
e(environment.variable_end_string),
e(environment.variable_end_string)
)), TOKEN_VARIABLE_END, '#pop')
] + tag_rules,
# raw block
TOKEN_RAW_BEGIN: [
(c('(.*?)((?:\s*%s\-|%s)\s*endraw\s*(?:\-%s\s*|%s%s))' % (
e(environment.block_start_string),
block_prefix_re,
e(environment.block_end_string),
e(environment.block_end_string),
block_suffix_re
)), (TOKEN_DATA, TOKEN_RAW_END), '#pop'),
(c('(.)'), (Failure('Missing end of raw directive'),), None)
],
# line statements
TOKEN_LINESTATEMENT_BEGIN: [
(c(r'\s*(\n|$)'), TOKEN_LINESTATEMENT_END, '#pop')
] + tag_rules,
# line comments
TOKEN_LINECOMMENT_BEGIN: [
(c(r'(.*?)()(?=\n|$)'), (TOKEN_LINECOMMENT,
TOKEN_LINECOMMENT_END), '#pop')
]
}
def _normalize_newlines(self, value):
"""Called for strings and template data to normalize it to unicode."""
return newline_re.sub(self.newline_sequence, value)
def tokenize(self, source, name=None, filename=None, state=None):
"""Calls tokeniter + tokenize and wraps it in a token stream.
"""
stream = self.tokeniter(source, name, filename, state)
return TokenStream(self.wrap(stream, name, filename), name, filename)
def wrap(self, stream, name=None, filename=None):
"""This is called with the stream as returned by `tokenize` and wraps
every token in a :class:`Token` and converts the value.
"""
for lineno, token, value in stream:
if token in ignored_tokens:
continue
elif token == 'linestatement_begin':
token = 'block_begin'
elif token == 'linestatement_end':
token = 'block_end'
# we are not interested in those tokens in the parser
elif token in ('raw_begin', 'raw_end'):
continue
elif token == 'data':
value = self._normalize_newlines(value)
elif token == 'keyword':
token = value
elif token == 'name':
value = str(value)
elif token == 'string':
# try to unescape string
try:
value = self._normalize_newlines(value[1:-1]) \
.encode('ascii', 'backslashreplace') \
.decode('unicode-escape')
except Exception as e:
msg = str(e).split(':')[-1].strip()
raise TemplateSyntaxError(msg, lineno, name, filename)
# if we can express it as bytestring (ascii only)
# we do that for support of semi broken APIs
# as datetime.datetime.strftime. On python 3 this
# call becomes a noop thanks to 2to3
try:
value = str(value)
except UnicodeError:
pass
elif token == 'integer':
value = int(value)
elif token == 'float':
value = float(value)
elif token == 'operator':
token = operators[value]
yield Token(lineno, token, value)
def tokeniter(self, source, name, filename=None, state=None):
"""This method tokenizes the text and returns the tokens in a
generator. Use this method if you just want to tokenize a template.
"""
source = text_type(source)
lines = source.splitlines()
if self.keep_trailing_newline and source:
for newline in ('\r\n', '\r', '\n'):
if source.endswith(newline):
lines.append('')
break
source = '\n'.join(lines)
pos = 0
lineno = 1
stack = ['root']
if state is not None and state != 'root':
assert state in ('variable', 'block'), 'invalid state'
stack.append(state + '_begin')
else:
state = 'root'
statetokens = self.rules[stack[-1]]
source_length = len(source)
balancing_stack = []
while 1:
# tokenizer loop
for regex, tokens, new_state in statetokens:
m = regex.match(source, pos)
# if no match we try again with the next rule
if m is None:
continue
# we only match blocks and variables if braces / parentheses
# are balanced. continue parsing with the lower rule which
# is the operator rule. do this only if the end tags look
# like operators
if balancing_stack and \
tokens in ('variable_end', 'block_end',
'linestatement_end'):
continue
# tuples support more options
if isinstance(tokens, tuple):
for idx, token in enumerate(tokens):
# failure group
if token.__class__ is Failure:
raise token(lineno, filename)
# bygroup is a bit more complex, in that case we
# yield for the current token the first named
# group that matched
elif token == '#bygroup':
for key, value in iteritems(m.groupdict()):
if value is not None:
yield lineno, key, value
lineno += value.count('\n')
break
else:
raise RuntimeError('%r wanted to resolve '
'the token dynamically'
' but no group matched'
% regex)
# normal group
else:
data = m.group(idx + 1)
if data or token not in ignore_if_empty:
yield lineno, token, data
lineno += data.count('\n')
# strings as token just are yielded as it.
else:
data = m.group()
# update brace/parentheses balance
if tokens == 'operator':
if data == '{':
balancing_stack.append('}')
elif data == '(':
balancing_stack.append(')')
elif data == '[':
balancing_stack.append(']')
elif data in ('}', ')', ']'):
if not balancing_stack:
raise TemplateSyntaxError('unexpected \'%s\'' %
data, lineno, name,
filename)
expected_op = balancing_stack.pop()
if expected_op != data:
raise TemplateSyntaxError('unexpected \'%s\', '
'expected \'%s\'' %
(data, expected_op),
lineno, name,
filename)
# yield items
if data or tokens not in ignore_if_empty:
yield lineno, tokens, data
lineno += data.count('\n')
# fetch new position into new variable so that we can check
# if there is a internal parsing error which would result
# in an infinite loop
pos2 = m.end()
# handle state changes
if new_state is not None:
# remove the uppermost state
if new_state == '#pop':
stack.pop()
# resolve the new state by group checking
elif new_state == '#bygroup':
for key, value in iteritems(m.groupdict()):
if value is not None:
stack.append(key)
break
else:
raise RuntimeError('%r wanted to resolve the '
'new state dynamically but'
' no group matched' %
regex)
# direct state name given
else:
stack.append(new_state)
statetokens = self.rules[stack[-1]]
# we are still at the same position and no stack change.
# this means a loop without break condition, avoid that and
# raise error
elif pos2 == pos:
raise RuntimeError('%r yielded empty string without '
'stack change' % regex)
# publish new function and start again
pos = pos2
break
# if loop terminated without break we haven't found a single match
# either we are at the end of the file or we have a problem
else:
# end of text
if pos >= source_length:
return
# something went wrong
raise TemplateSyntaxError('unexpected char %r at %d' %
(source[pos], pos), lineno,
name, filename)

471
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@ -1,471 +0,0 @@
# -*- coding: utf-8 -*-
"""
jinja2.loaders
~~~~~~~~~~~~~~
Jinja loader classes.
:copyright: (c) 2010 by the Jinja Team.
:license: BSD, see LICENSE for more details.
"""
import os
import sys
import weakref
from types import ModuleType
from os import path
from hashlib import sha1
from jinja2.exceptions import TemplateNotFound
from jinja2.utils import open_if_exists, internalcode
from jinja2._compat import string_types, iteritems
def split_template_path(template):
"""Split a path into segments and perform a sanity check. If it detects
'..' in the path it will raise a `TemplateNotFound` error.
"""
pieces = []
for piece in template.split('/'):
if path.sep in piece \
or (path.altsep and path.altsep in piece) or \
piece == path.pardir:
raise TemplateNotFound(template)
elif piece and piece != '.':
pieces.append(piece)
return pieces
class BaseLoader(object):
"""Baseclass for all loaders. Subclass this and override `get_source` to
implement a custom loading mechanism. The environment provides a
`get_template` method that calls the loader's `load` method to get the
:class:`Template` object.
A very basic example for a loader that looks up templates on the file
system could look like this::
from jinja2 import BaseLoader, TemplateNotFound
from os.path import join, exists, getmtime
class MyLoader(BaseLoader):
def __init__(self, path):
self.path = path
def get_source(self, environment, template):
path = join(self.path, template)
if not exists(path):
raise TemplateNotFound(template)
mtime = getmtime(path)
with file(path) as f:
source = f.read().decode('utf-8')
return source, path, lambda: mtime == getmtime(path)
"""
#: if set to `False` it indicates that the loader cannot provide access
#: to the source of templates.
#:
#: .. versionadded:: 2.4
has_source_access = True
def get_source(self, environment, template):
"""Get the template source, filename and reload helper for a template.
It's passed the environment and template name and has to return a
tuple in the form ``(source, filename, uptodate)`` or raise a
`TemplateNotFound` error if it can't locate the template.
The source part of the returned tuple must be the source of the
template as unicode string or a ASCII bytestring. The filename should
be the name of the file on the filesystem if it was loaded from there,
otherwise `None`. The filename is used by python for the tracebacks
if no loader extension is used.
The last item in the tuple is the `uptodate` function. If auto
reloading is enabled it's always called to check if the template
changed. No arguments are passed so the function must store the
old state somewhere (for example in a closure). If it returns `False`
the template will be reloaded.
"""
if not self.has_source_access:
raise RuntimeError('%s cannot provide access to the source' %
self.__class__.__name__)
raise TemplateNotFound(template)
def list_templates(self):
"""Iterates over all templates. If the loader does not support that
it should raise a :exc:`TypeError` which is the default behavior.
"""
raise TypeError('this loader cannot iterate over all templates')
@internalcode
def load(self, environment, name, globals=None):
"""Loads a template. This method looks up the template in the cache
or loads one by calling :meth:`get_source`. Subclasses should not
override this method as loaders working on collections of other
loaders (such as :class:`PrefixLoader` or :class:`ChoiceLoader`)
will not call this method but `get_source` directly.
"""
code = None
if globals is None:
globals = {}
# first we try to get the source for this template together
# with the filename and the uptodate function.
source, filename, uptodate = self.get_source(environment, name)
# try to load the code from the bytecode cache if there is a
# bytecode cache configured.
bcc = environment.bytecode_cache
if bcc is not None:
bucket = bcc.get_bucket(environment, name, filename, source)
code = bucket.code
# if we don't have code so far (not cached, no longer up to
# date) etc. we compile the template
if code is None:
code = environment.compile(source, name, filename)
# if the bytecode cache is available and the bucket doesn't
# have a code so far, we give the bucket the new code and put
# it back to the bytecode cache.
if bcc is not None and bucket.code is None:
bucket.code = code
bcc.set_bucket(bucket)
return environment.template_class.from_code(environment, code,
globals, uptodate)
class FileSystemLoader(BaseLoader):
"""Loads templates from the file system. This loader can find templates
in folders on the file system and is the preferred way to load them.
The loader takes the path to the templates as string, or if multiple
locations are wanted a list of them which is then looked up in the
given order:
>>> loader = FileSystemLoader('/path/to/templates')
>>> loader = FileSystemLoader(['/path/to/templates', '/other/path'])
Per default the template encoding is ``'utf-8'`` which can be changed
by setting the `encoding` parameter to something else.
"""
def __init__(self, searchpath, encoding='utf-8'):
if isinstance(searchpath, string_types):
searchpath = [searchpath]
self.searchpath = list(searchpath)
self.encoding = encoding
def get_source(self, environment, template):
pieces = split_template_path(template)
for searchpath in self.searchpath:
filename = path.join(searchpath, *pieces)
f = open_if_exists(filename)
if f is None:
continue
try:
contents = f.read().decode(self.encoding)
finally:
f.close()
mtime = path.getmtime(filename)
def uptodate():
try:
return path.getmtime(filename) == mtime
except OSError:
return False
return contents, filename, uptodate
raise TemplateNotFound(template)
def list_templates(self):
found = set()
for searchpath in self.searchpath:
for dirpath, dirnames, filenames in os.walk(searchpath):
for filename in filenames:
template = os.path.join(dirpath, filename) \
[len(searchpath):].strip(os.path.sep) \
.replace(os.path.sep, '/')
if template[:2] == './':
template = template[2:]
if template not in found:
found.add(template)
return sorted(found)
class PackageLoader(BaseLoader):
"""Load templates from python eggs or packages. It is constructed with
the name of the python package and the path to the templates in that
package::
loader = PackageLoader('mypackage', 'views')
If the package path is not given, ``'templates'`` is assumed.
Per default the template encoding is ``'utf-8'`` which can be changed
by setting the `encoding` parameter to something else. Due to the nature
of eggs it's only possible to reload templates if the package was loaded
from the file system and not a zip file.
"""
def __init__(self, package_name, package_path='templates',
encoding='utf-8'):
from pkg_resources import DefaultProvider, ResourceManager, \
get_provider
provider = get_provider(package_name)
self.encoding = encoding
self.manager = ResourceManager()
self.filesystem_bound = isinstance(provider, DefaultProvider)
self.provider = provider
self.package_path = package_path
def get_source(self, environment, template):
pieces = split_template_path(template)
p = '/'.join((self.package_path,) + tuple(pieces))
if not self.provider.has_resource(p):
raise TemplateNotFound(template)
filename = uptodate = None
if self.filesystem_bound:
filename = self.provider.get_resource_filename(self.manager, p)
mtime = path.getmtime(filename)
def uptodate():
try:
return path.getmtime(filename) == mtime
except OSError:
return False
source = self.provider.get_resource_string(self.manager, p)
return source.decode(self.encoding), filename, uptodate
def list_templates(self):
path = self.package_path
if path[:2] == './':
path = path[2:]
elif path == '.':
path = ''
offset = len(path)
results = []
def _walk(path):
for filename in self.provider.resource_listdir(path):
fullname = path + '/' + filename
if self.provider.resource_isdir(fullname):
_walk(fullname)
else:
results.append(fullname[offset:].lstrip('/'))
_walk(path)
results.sort()
return results
class DictLoader(BaseLoader):
"""Loads a template from a python dict. It's passed a dict of unicode
strings bound to template names. This loader is useful for unittesting:
>>> loader = DictLoader({'index.html': 'source here'})
Because auto reloading is rarely useful this is disabled per default.
"""
def __init__(self, mapping):
self.mapping = mapping
def get_source(self, environment, template):
if template in self.mapping:
source = self.mapping[template]
return source, None, lambda: source == self.mapping.get(template)
raise TemplateNotFound(template)
def list_templates(self):
return sorted(self.mapping)
class FunctionLoader(BaseLoader):
"""A loader that is passed a function which does the loading. The
function becomes the name of the template passed and has to return either
an unicode string with the template source, a tuple in the form ``(source,
filename, uptodatefunc)`` or `None` if the template does not exist.
>>> def load_template(name):
... if name == 'index.html':
... return '...'
...
>>> loader = FunctionLoader(load_template)
The `uptodatefunc` is a function that is called if autoreload is enabled
and has to return `True` if the template is still up to date. For more
details have a look at :meth:`BaseLoader.get_source` which has the same
return value.
"""
def __init__(self, load_func):
self.load_func = load_func
def get_source(self, environment, template):
rv = self.load_func(template)
if rv is None:
raise TemplateNotFound(template)
elif isinstance(rv, string_types):
return rv, None, None
return rv
class PrefixLoader(BaseLoader):
"""A loader that is passed a dict of loaders where each loader is bound
to a prefix. The prefix is delimited from the template by a slash per
default, which can be changed by setting the `delimiter` argument to
something else::
loader = PrefixLoader({
'app1': PackageLoader('mypackage.app1'),
'app2': PackageLoader('mypackage.app2')
})
By loading ``'app1/index.html'`` the file from the app1 package is loaded,
by loading ``'app2/index.html'`` the file from the second.
"""
def __init__(self, mapping, delimiter='/'):
self.mapping = mapping
self.delimiter = delimiter
def get_loader(self, template):
try:
prefix, name = template.split(self.delimiter, 1)
loader = self.mapping[prefix]
except (ValueError, KeyError):
raise TemplateNotFound(template)
return loader, name
def get_source(self, environment, template):
loader, name = self.get_loader(template)
try:
return loader.get_source(environment, name)
except TemplateNotFound:
# re-raise the exception with the correct fileame here.
# (the one that includes the prefix)
raise TemplateNotFound(template)
@internalcode
def load(self, environment, name, globals=None):
loader, local_name = self.get_loader(name)
try:
return loader.load(environment, local_name)
except TemplateNotFound:
# re-raise the exception with the correct fileame here.
# (the one that includes the prefix)
raise TemplateNotFound(name)
def list_templates(self):
result = []
for prefix, loader in iteritems(self.mapping):
for template in loader.list_templates():
result.append(prefix + self.delimiter + template)
return result
class ChoiceLoader(BaseLoader):
"""This loader works like the `PrefixLoader` just that no prefix is
specified. If a template could not be found by one loader the next one
is tried.
>>> loader = ChoiceLoader([
... FileSystemLoader('/path/to/user/templates'),
... FileSystemLoader('/path/to/system/templates')
... ])
This is useful if you want to allow users to override builtin templates
from a different location.
"""
def __init__(self, loaders):
self.loaders = loaders
def get_source(self, environment, template):
for loader in self.loaders:
try:
return loader.get_source(environment, template)
except TemplateNotFound:
pass
raise TemplateNotFound(template)
@internalcode
def load(self, environment, name, globals=None):
for loader in self.loaders:
try:
return loader.load(environment, name, globals)
except TemplateNotFound:
pass
raise TemplateNotFound(name)
def list_templates(self):
found = set()
for loader in self.loaders:
found.update(loader.list_templates())
return sorted(found)
class _TemplateModule(ModuleType):
"""Like a normal module but with support for weak references"""
class ModuleLoader(BaseLoader):
"""This loader loads templates from precompiled templates.
Example usage:
>>> loader = ChoiceLoader([
... ModuleLoader('/path/to/compiled/templates'),
... FileSystemLoader('/path/to/templates')
... ])
Templates can be precompiled with :meth:`Environment.compile_templates`.
"""
has_source_access = False
def __init__(self, path):
package_name = '_jinja2_module_templates_%x' % id(self)
# create a fake module that looks for the templates in the
# path given.
mod = _TemplateModule(package_name)
if isinstance(path, string_types):
path = [path]
else:
path = list(path)
mod.__path__ = path
sys.modules[package_name] = weakref.proxy(mod,
lambda x: sys.modules.pop(package_name, None))
# the only strong reference, the sys.modules entry is weak
# so that the garbage collector can remove it once the
# loader that created it goes out of business.
self.module = mod
self.package_name = package_name
@staticmethod
def get_template_key(name):
return 'tmpl_' + sha1(name.encode('utf-8')).hexdigest()
@staticmethod
def get_module_filename(name):
return ModuleLoader.get_template_key(name) + '.py'
@internalcode
def load(self, environment, name, globals=None):
key = self.get_template_key(name)
module = '%s.%s' % (self.package_name, key)
mod = getattr(self.module, module, None)
if mod is None:
try:
mod = __import__(module, None, None, ['root'])
except ImportError:
raise TemplateNotFound(name)
# remove the entry from sys.modules, we only want the attribute
# on the module object we have stored on the loader.
sys.modules.pop(module, None)
return environment.template_class.from_module_dict(
environment, mod.__dict__, globals)

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@ -1,234 +0,0 @@
# -*- coding: utf-8 -*-
"""
markupsafe
~~~~~~~~~~
Implements a Markup string.
:copyright: (c) 2010 by Armin Ronacher.
:license: BSD, see LICENSE for more details.
"""
import re
from ._compat import text_type, string_types, int_types, \
unichr, PY2
__all__ = ['Markup', 'soft_unicode', 'escape', 'escape_silent']
_striptags_re = re.compile(r'(<!--.*?-->|<[^>]*>)')
_entity_re = re.compile(r'&([^;]+);')
class Markup(text_type):
r"""Marks a string as being safe for inclusion in HTML/XML output without
needing to be escaped. This implements the `__html__` interface a couple
of frameworks and web applications use. :class:`Markup` is a direct
subclass of `unicode` and provides all the methods of `unicode` just that
it escapes arguments passed and always returns `Markup`.
The `escape` function returns markup objects so that double escaping can't
happen.
The constructor of the :class:`Markup` class can be used for three
different things: When passed an unicode object it's assumed to be safe,
when passed an object with an HTML representation (has an `__html__`
method) that representation is used, otherwise the object passed is
converted into a unicode string and then assumed to be safe:
>>> Markup("Hello <em>World</em>!")
Markup(u'Hello <em>World</em>!')
>>> class Foo(object):
... def __html__(self):
... return '<a href="#">foo</a>'
...
>>> Markup(Foo())
Markup(u'<a href="#">foo</a>')
If you want object passed being always treated as unsafe you can use the
:meth:`escape` classmethod to create a :class:`Markup` object:
>>> Markup.escape("Hello <em>World</em>!")
Markup(u'Hello &lt;em&gt;World&lt;/em&gt;!')
Operations on a markup string are markup aware which means that all
arguments are passed through the :func:`escape` function:
>>> em = Markup("<em>%s</em>")
>>> em % "foo & bar"
Markup(u'<em>foo &amp; bar</em>')
>>> strong = Markup("<strong>%(text)s</strong>")
>>> strong % {'text': '<blink>hacker here</blink>'}
Markup(u'<strong>&lt;blink&gt;hacker here&lt;/blink&gt;</strong>')
>>> Markup("<em>Hello</em> ") + "<foo>"
Markup(u'<em>Hello</em> &lt;foo&gt;')
"""
__slots__ = ()
def __new__(cls, base=u'', encoding=None, errors='strict'):
if hasattr(base, '__html__'):
base = base.__html__()
if encoding is None:
return text_type.__new__(cls, base)
return text_type.__new__(cls, base, encoding, errors)
def __html__(self):
return self
def __add__(self, other):
if isinstance(other, string_types) or hasattr(other, '__html__'):
return self.__class__(super(Markup, self).__add__(self.escape(other)))
return NotImplemented
def __radd__(self, other):
if hasattr(other, '__html__') or isinstance(other, string_types):
return self.escape(other).__add__(self)
return NotImplemented
def __mul__(self, num):
if isinstance(num, int_types):
return self.__class__(text_type.__mul__(self, num))
return NotImplemented
__rmul__ = __mul__
def __mod__(self, arg):
if isinstance(arg, tuple):
arg = tuple(_MarkupEscapeHelper(x, self.escape) for x in arg)
else:
arg = _MarkupEscapeHelper(arg, self.escape)
return self.__class__(text_type.__mod__(self, arg))
def __repr__(self):
return '%s(%s)' % (
self.__class__.__name__,
text_type.__repr__(self)
)
def join(self, seq):
return self.__class__(text_type.join(self, map(self.escape, seq)))
join.__doc__ = text_type.join.__doc__
def split(self, *args, **kwargs):
return list(map(self.__class__, text_type.split(self, *args, **kwargs)))
split.__doc__ = text_type.split.__doc__
def rsplit(self, *args, **kwargs):
return list(map(self.__class__, text_type.rsplit(self, *args, **kwargs)))
rsplit.__doc__ = text_type.rsplit.__doc__
def splitlines(self, *args, **kwargs):
return list(map(self.__class__, text_type.splitlines(self, *args, **kwargs)))
splitlines.__doc__ = text_type.splitlines.__doc__
def unescape(self):
r"""Unescape markup again into an text_type string. This also resolves
known HTML4 and XHTML entities:
>>> Markup("Main &raquo; <em>About</em>").unescape()
u'Main \xbb <em>About</em>'
"""
from _constants import HTML_ENTITIES
def handle_match(m):
name = m.group(1)
if name in HTML_ENTITIES:
return unichr(HTML_ENTITIES[name])
try:
if name[:2] in ('#x', '#X'):
return unichr(int(name[2:], 16))
elif name.startswith('#'):
return unichr(int(name[1:]))
except ValueError:
pass
return u''
return _entity_re.sub(handle_match, text_type(self))
def striptags(self):
r"""Unescape markup into an text_type string and strip all tags. This
also resolves known HTML4 and XHTML entities. Whitespace is
normalized to one:
>>> Markup("Main &raquo; <em>About</em>").striptags()
u'Main \xbb About'
"""
stripped = u' '.join(_striptags_re.sub('', self).split())
return Markup(stripped).unescape()
@classmethod
def escape(cls, s):
"""Escape the string. Works like :func:`escape` with the difference
that for subclasses of :class:`Markup` this function would return the
correct subclass.
"""
rv = escape(s)
if rv.__class__ is not cls:
return cls(rv)
return rv
def make_wrapper(name):
orig = getattr(text_type, name)
def func(self, *args, **kwargs):
args = _escape_argspec(list(args), enumerate(args), self.escape)
#_escape_argspec(kwargs, kwargs.iteritems(), None)
return self.__class__(orig(self, *args, **kwargs))
func.__name__ = orig.__name__
func.__doc__ = orig.__doc__
return func
for method in '__getitem__', 'capitalize', \
'title', 'lower', 'upper', 'replace', 'ljust', \
'rjust', 'lstrip', 'rstrip', 'center', 'strip', \
'translate', 'expandtabs', 'swapcase', 'zfill':
locals()[method] = make_wrapper(method)
# new in python 2.5
if hasattr(text_type, 'partition'):
def partition(self, sep):
return tuple(map(self.__class__,
text_type.partition(self, self.escape(sep))))
def rpartition(self, sep):
return tuple(map(self.__class__,
text_type.rpartition(self, self.escape(sep))))
# new in python 2.6
if hasattr(text_type, 'format'):
format = make_wrapper('format')
# not in python 3
if hasattr(text_type, '__getslice__'):
__getslice__ = make_wrapper('__getslice__')
del method, make_wrapper
def _escape_argspec(obj, iterable, escape):
"""Helper for various string-wrapped functions."""
for key, value in iterable:
if hasattr(value, '__html__') or isinstance(value, string_types):
obj[key] = escape(value)
return obj
class _MarkupEscapeHelper(object):
"""Helper for Markup.__mod__"""
def __init__(self, obj, escape):
self.obj = obj
self.escape = escape
__getitem__ = lambda s, x: _MarkupEscapeHelper(s.obj[x], s.escape)
__unicode__ = __str__ = lambda s: text_type(s.escape(s.obj))
__repr__ = lambda s: str(s.escape(repr(s.obj)))
__int__ = lambda s: int(s.obj)
__float__ = lambda s: float(s.obj)
# we have to import it down here as the speedups and native
# modules imports the markup type which is define above.
try:
from _speedups import escape, escape_silent, soft_unicode
except ImportError:
from ._native import escape, escape_silent, soft_unicode
if not PY2:
soft_str = soft_unicode
__all__.append('soft_str')

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# -*- coding: utf-8 -*-
"""
markupsafe._compat
~~~~~~~~~~~~~~~~~~
Compatibility module for different Python versions.
:copyright: (c) 2013 by Armin Ronacher.
:license: BSD, see LICENSE for more details.
"""
import sys
PY2 = sys.version_info[0] == 2
if not PY2:
text_type = str
string_types = (str,)
unichr = chr
int_types = (int,)
else:
text_type = unicode
string_types = (str, unicode)
unichr = unichr
int_types = (int, long)

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# -*- coding: utf-8 -*-
"""
markupsafe._constants
~~~~~~~~~~~~~~~~~~~~~
Highlevel implementation of the Markup string.
:copyright: (c) 2010 by Armin Ronacher.
:license: BSD, see LICENSE for more details.
"""
HTML_ENTITIES = {
'AElig': 198,
'Aacute': 193,
'Acirc': 194,
'Agrave': 192,
'Alpha': 913,
'Aring': 197,
'Atilde': 195,
'Auml': 196,
'Beta': 914,
'Ccedil': 199,
'Chi': 935,
'Dagger': 8225,
'Delta': 916,
'ETH': 208,
'Eacute': 201,
'Ecirc': 202,
'Egrave': 200,
'Epsilon': 917,
'Eta': 919,
'Euml': 203,
'Gamma': 915,
'Iacute': 205,
'Icirc': 206,
'Igrave': 204,
'Iota': 921,
'Iuml': 207,
'Kappa': 922,
'Lambda': 923,
'Mu': 924,
'Ntilde': 209,
'Nu': 925,
'OElig': 338,
'Oacute': 211,
'Ocirc': 212,
'Ograve': 210,
'Omega': 937,
'Omicron': 927,
'Oslash': 216,
'Otilde': 213,
'Ouml': 214,
'Phi': 934,
'Pi': 928,
'Prime': 8243,
'Psi': 936,
'Rho': 929,
'Scaron': 352,
'Sigma': 931,
'THORN': 222,
'Tau': 932,
'Theta': 920,
'Uacute': 218,
'Ucirc': 219,
'Ugrave': 217,
'Upsilon': 933,
'Uuml': 220,
'Xi': 926,
'Yacute': 221,
'Yuml': 376,
'Zeta': 918,
'aacute': 225,
'acirc': 226,
'acute': 180,
'aelig': 230,
'agrave': 224,
'alefsym': 8501,
'alpha': 945,
'amp': 38,
'and': 8743,
'ang': 8736,
'apos': 39,
'aring': 229,
'asymp': 8776,
'atilde': 227,
'auml': 228,
'bdquo': 8222,
'beta': 946,
'brvbar': 166,
'bull': 8226,
'cap': 8745,
'ccedil': 231,
'cedil': 184,
'cent': 162,
'chi': 967,
'circ': 710,
'clubs': 9827,
'cong': 8773,
'copy': 169,
'crarr': 8629,
'cup': 8746,
'curren': 164,
'dArr': 8659,
'dagger': 8224,
'darr': 8595,
'deg': 176,
'delta': 948,
'diams': 9830,
'divide': 247,
'eacute': 233,
'ecirc': 234,
'egrave': 232,
'empty': 8709,
'emsp': 8195,
'ensp': 8194,
'epsilon': 949,
'equiv': 8801,
'eta': 951,
'eth': 240,
'euml': 235,
'euro': 8364,
'exist': 8707,
'fnof': 402,
'forall': 8704,
'frac12': 189,
'frac14': 188,
'frac34': 190,
'frasl': 8260,
'gamma': 947,
'ge': 8805,
'gt': 62,
'hArr': 8660,
'harr': 8596,
'hearts': 9829,
'hellip': 8230,
'iacute': 237,
'icirc': 238,
'iexcl': 161,
'igrave': 236,
'image': 8465,
'infin': 8734,
'int': 8747,
'iota': 953,
'iquest': 191,
'isin': 8712,
'iuml': 239,
'kappa': 954,
'lArr': 8656,
'lambda': 955,
'lang': 9001,
'laquo': 171,
'larr': 8592,
'lceil': 8968,
'ldquo': 8220,
'le': 8804,
'lfloor': 8970,
'lowast': 8727,
'loz': 9674,
'lrm': 8206,
'lsaquo': 8249,
'lsquo': 8216,
'lt': 60,
'macr': 175,
'mdash': 8212,
'micro': 181,
'middot': 183,
'minus': 8722,
'mu': 956,
'nabla': 8711,
'nbsp': 160,
'ndash': 8211,
'ne': 8800,
'ni': 8715,
'not': 172,
'notin': 8713,
'nsub': 8836,
'ntilde': 241,
'nu': 957,
'oacute': 243,
'ocirc': 244,
'oelig': 339,
'ograve': 242,
'oline': 8254,
'omega': 969,
'omicron': 959,
'oplus': 8853,
'or': 8744,
'ordf': 170,
'ordm': 186,
'oslash': 248,
'otilde': 245,
'otimes': 8855,
'ouml': 246,
'para': 182,
'part': 8706,
'permil': 8240,
'perp': 8869,
'phi': 966,
'pi': 960,
'piv': 982,
'plusmn': 177,
'pound': 163,
'prime': 8242,
'prod': 8719,
'prop': 8733,
'psi': 968,
'quot': 34,
'rArr': 8658,
'radic': 8730,
'rang': 9002,
'raquo': 187,
'rarr': 8594,
'rceil': 8969,
'rdquo': 8221,
'real': 8476,
'reg': 174,
'rfloor': 8971,
'rho': 961,
'rlm': 8207,
'rsaquo': 8250,
'rsquo': 8217,
'sbquo': 8218,
'scaron': 353,
'sdot': 8901,
'sect': 167,
'shy': 173,
'sigma': 963,
'sigmaf': 962,
'sim': 8764,
'spades': 9824,
'sub': 8834,
'sube': 8838,
'sum': 8721,
'sup': 8835,
'sup1': 185,
'sup2': 178,
'sup3': 179,
'supe': 8839,
'szlig': 223,
'tau': 964,
'there4': 8756,
'theta': 952,
'thetasym': 977,
'thinsp': 8201,
'thorn': 254,
'tilde': 732,
'times': 215,
'trade': 8482,
'uArr': 8657,
'uacute': 250,
'uarr': 8593,
'ucirc': 251,
'ugrave': 249,
'uml': 168,
'upsih': 978,
'upsilon': 965,
'uuml': 252,
'weierp': 8472,
'xi': 958,
'yacute': 253,
'yen': 165,
'yuml': 255,
'zeta': 950,
'zwj': 8205,
'zwnj': 8204
}

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# -*- coding: utf-8 -*-
"""
markupsafe._native
~~~~~~~~~~~~~~~~~~
Native Python implementation the C module is not compiled.
:copyright: (c) 2010 by Armin Ronacher.
:license: BSD, see LICENSE for more details.
"""
from ._compat import text_type
def escape(s):
"""Convert the characters &, <, >, ' and " in string s to HTML-safe
sequences. Use this if you need to display text that might contain
such characters in HTML. Marks return value as markup string.
"""
if hasattr(s, '__html__'):
return s.__html__()
return Markup(text_type(s)
.replace('&', '&amp;')
.replace('>', '&gt;')
.replace('<', '&lt;')
.replace("'", '&#39;')
.replace('"', '&#34;')
)
def escape_silent(s):
"""Like :func:`escape` but converts `None` into an empty
markup string.
"""
if s is None:
return Markup()
return escape(s)
def soft_unicode(s):
"""Make a string unicode if it isn't already. That way a markup
string is not converted back to unicode.
"""
if not isinstance(s, text_type):
s = text_type(s)
return s

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# -*- coding: utf-8 -*-
"""
jinja2.meta
~~~~~~~~~~~
This module implements various functions that exposes information about
templates that might be interesting for various kinds of applications.
:copyright: (c) 2010 by the Jinja Team, see AUTHORS for more details.
:license: BSD, see LICENSE for more details.
"""
from jinja2 import nodes
from jinja2.compiler import CodeGenerator
from jinja2._compat import string_types
class TrackingCodeGenerator(CodeGenerator):
"""We abuse the code generator for introspection."""
def __init__(self, environment):
CodeGenerator.__init__(self, environment, '<introspection>',
'<introspection>')
self.undeclared_identifiers = set()
def write(self, x):
"""Don't write."""
def pull_locals(self, frame):
"""Remember all undeclared identifiers."""
self.undeclared_identifiers.update(frame.identifiers.undeclared)
def find_undeclared_variables(ast):
"""Returns a set of all variables in the AST that will be looked up from
the context at runtime. Because at compile time it's not known which
variables will be used depending on the path the execution takes at
runtime, all variables are returned.
>>> from jinja2 import Environment, meta
>>> env = Environment()
>>> ast = env.parse('{% set foo = 42 %}{{ bar + foo }}')
>>> meta.find_undeclared_variables(ast)
set(['bar'])
.. admonition:: Implementation
Internally the code generator is used for finding undeclared variables.
This is good to know because the code generator might raise a
:exc:`TemplateAssertionError` during compilation and as a matter of
fact this function can currently raise that exception as well.
"""
codegen = TrackingCodeGenerator(ast.environment)
codegen.visit(ast)
return codegen.undeclared_identifiers
def find_referenced_templates(ast):
"""Finds all the referenced templates from the AST. This will return an
iterator over all the hardcoded template extensions, inclusions and
imports. If dynamic inheritance or inclusion is used, `None` will be
yielded.
>>> from jinja2 import Environment, meta
>>> env = Environment()
>>> ast = env.parse('{% extends "layout.html" %}{% include helper %}')
>>> list(meta.find_referenced_templates(ast))
['layout.html', None]
This function is useful for dependency tracking. For example if you want
to rebuild parts of the website after a layout template has changed.
"""
for node in ast.find_all((nodes.Extends, nodes.FromImport, nodes.Import,
nodes.Include)):
if not isinstance(node.template, nodes.Const):
# a tuple with some non consts in there
if isinstance(node.template, (nodes.Tuple, nodes.List)):
for template_name in node.template.items:
# something const, only yield the strings and ignore
# non-string consts that really just make no sense
if isinstance(template_name, nodes.Const):
if isinstance(template_name.value, string_types):
yield template_name.value
# something dynamic in there
else:
yield None
# something dynamic we don't know about here
else:
yield None
continue
# constant is a basestring, direct template name
if isinstance(node.template.value, string_types):
yield node.template.value
# a tuple or list (latter *should* not happen) made of consts,
# yield the consts that are strings. We could warn here for
# non string values
elif isinstance(node, nodes.Include) and \
isinstance(node.template.value, (tuple, list)):
for template_name in node.template.value:
if isinstance(template_name, string_types):
yield template_name
# something else we don't care about, we could warn here
else:
yield None

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# -*- coding: utf-8 -*-
"""
jinja2.nodes
~~~~~~~~~~~~
This module implements additional nodes derived from the ast base node.
It also provides some node tree helper functions like `in_lineno` and
`get_nodes` used by the parser and translator in order to normalize
python and jinja nodes.
:copyright: (c) 2010 by the Jinja Team.
:license: BSD, see LICENSE for more details.
"""
import operator
from collections import deque
from jinja2.utils import Markup
from jinja2._compat import next, izip, with_metaclass, text_type, \
method_type, function_type
#: the types we support for context functions
_context_function_types = (function_type, method_type)
_binop_to_func = {
'*': operator.mul,
'/': operator.truediv,
'//': operator.floordiv,
'**': operator.pow,
'%': operator.mod,
'+': operator.add,
'-': operator.sub
}
_uaop_to_func = {
'not': operator.not_,
'+': operator.pos,
'-': operator.neg
}
_cmpop_to_func = {
'eq': operator.eq,
'ne': operator.ne,
'gt': operator.gt,
'gteq': operator.ge,
'lt': operator.lt,
'lteq': operator.le,
'in': lambda a, b: a in b,
'notin': lambda a, b: a not in b
}
class Impossible(Exception):
"""Raised if the node could not perform a requested action."""
class NodeType(type):
"""A metaclass for nodes that handles the field and attribute
inheritance. fields and attributes from the parent class are
automatically forwarded to the child."""
def __new__(cls, name, bases, d):
for attr in 'fields', 'attributes':
storage = []
storage.extend(getattr(bases[0], attr, ()))
storage.extend(d.get(attr, ()))
assert len(bases) == 1, 'multiple inheritance not allowed'
assert len(storage) == len(set(storage)), 'layout conflict'
d[attr] = tuple(storage)
d.setdefault('abstract', False)
return type.__new__(cls, name, bases, d)
class EvalContext(object):
"""Holds evaluation time information. Custom attributes can be attached
to it in extensions.
"""
def __init__(self, environment, template_name=None):
self.environment = environment
if callable(environment.autoescape):
self.autoescape = environment.autoescape(template_name)
else:
self.autoescape = environment.autoescape
self.volatile = False
def save(self):
return self.__dict__.copy()
def revert(self, old):
self.__dict__.clear()
self.__dict__.update(old)
def get_eval_context(node, ctx):
if ctx is None:
if node.environment is None:
raise RuntimeError('if no eval context is passed, the '
'node must have an attached '
'environment.')
return EvalContext(node.environment)
return ctx
class Node(with_metaclass(NodeType, object)):
"""Baseclass for all Jinja2 nodes. There are a number of nodes available
of different types. There are four major types:
- :class:`Stmt`: statements
- :class:`Expr`: expressions
- :class:`Helper`: helper nodes
- :class:`Template`: the outermost wrapper node
All nodes have fields and attributes. Fields may be other nodes, lists,
or arbitrary values. Fields are passed to the constructor as regular
positional arguments, attributes as keyword arguments. Each node has
two attributes: `lineno` (the line number of the node) and `environment`.
The `environment` attribute is set at the end of the parsing process for
all nodes automatically.
"""
fields = ()
attributes = ('lineno', 'environment')
abstract = True
def __init__(self, *fields, **attributes):
if self.abstract:
raise TypeError('abstract nodes are not instanciable')
if fields:
if len(fields) != len(self.fields):
if not self.fields:
raise TypeError('%r takes 0 arguments' %
self.__class__.__name__)
raise TypeError('%r takes 0 or %d argument%s' % (
self.__class__.__name__,
len(self.fields),
len(self.fields) != 1 and 's' or ''
))
for name, arg in izip(self.fields, fields):
setattr(self, name, arg)
for attr in self.attributes:
setattr(self, attr, attributes.pop(attr, None))
if attributes:
raise TypeError('unknown attribute %r' %
next(iter(attributes)))
def iter_fields(self, exclude=None, only=None):
"""This method iterates over all fields that are defined and yields
``(key, value)`` tuples. Per default all fields are returned, but
it's possible to limit that to some fields by providing the `only`
parameter or to exclude some using the `exclude` parameter. Both
should be sets or tuples of field names.
"""
for name in self.fields:
if (exclude is only is None) or \
(exclude is not None and name not in exclude) or \
(only is not None and name in only):
try:
yield name, getattr(self, name)
except AttributeError:
pass
def iter_child_nodes(self, exclude=None, only=None):
"""Iterates over all direct child nodes of the node. This iterates
over all fields and yields the values of they are nodes. If the value
of a field is a list all the nodes in that list are returned.
"""
for field, item in self.iter_fields(exclude, only):
if isinstance(item, list):
for n in item:
if isinstance(n, Node):
yield n
elif isinstance(item, Node):
yield item
def find(self, node_type):
"""Find the first node of a given type. If no such node exists the
return value is `None`.
"""
for result in self.find_all(node_type):
return result
def find_all(self, node_type):
"""Find all the nodes of a given type. If the type is a tuple,
the check is performed for any of the tuple items.
"""
for child in self.iter_child_nodes():
if isinstance(child, node_type):
yield child
for result in child.find_all(node_type):
yield result
def set_ctx(self, ctx):
"""Reset the context of a node and all child nodes. Per default the
parser will all generate nodes that have a 'load' context as it's the
most common one. This method is used in the parser to set assignment
targets and other nodes to a store context.
"""
todo = deque([self])
while todo:
node = todo.popleft()
if 'ctx' in node.fields:
node.ctx = ctx
todo.extend(node.iter_child_nodes())
return self
def set_lineno(self, lineno, override=False):
"""Set the line numbers of the node and children."""
todo = deque([self])
while todo:
node = todo.popleft()
if 'lineno' in node.attributes:
if node.lineno is None or override:
node.lineno = lineno
todo.extend(node.iter_child_nodes())
return self
def set_environment(self, environment):
"""Set the environment for all nodes."""
todo = deque([self])
while todo:
node = todo.popleft()
node.environment = environment
todo.extend(node.iter_child_nodes())
return self
def __eq__(self, other):
return type(self) is type(other) and \
tuple(self.iter_fields()) == tuple(other.iter_fields())
def __ne__(self, other):
return not self.__eq__(other)
# Restore Python 2 hashing behavior on Python 3
__hash__ = object.__hash__
def __repr__(self):
return '%s(%s)' % (
self.__class__.__name__,
', '.join('%s=%r' % (arg, getattr(self, arg, None)) for
arg in self.fields)
)
class Stmt(Node):
"""Base node for all statements."""
abstract = True
class Helper(Node):
"""Nodes that exist in a specific context only."""
abstract = True
class Template(Node):
"""Node that represents a template. This must be the outermost node that
is passed to the compiler.
"""
fields = ('body',)
class Output(Stmt):
"""A node that holds multiple expressions which are then printed out.
This is used both for the `print` statement and the regular template data.
"""
fields = ('nodes',)
class Extends(Stmt):
"""Represents an extends statement."""
fields = ('template',)
class For(Stmt):
"""The for loop. `target` is the target for the iteration (usually a
:class:`Name` or :class:`Tuple`), `iter` the iterable. `body` is a list
of nodes that are used as loop-body, and `else_` a list of nodes for the
`else` block. If no else node exists it has to be an empty list.
For filtered nodes an expression can be stored as `test`, otherwise `None`.
"""
fields = ('target', 'iter', 'body', 'else_', 'test', 'recursive')
class If(Stmt):
"""If `test` is true, `body` is rendered, else `else_`."""
fields = ('test', 'body', 'else_')
class Macro(Stmt):
"""A macro definition. `name` is the name of the macro, `args` a list of
arguments and `defaults` a list of defaults if there are any. `body` is
a list of nodes for the macro body.
"""
fields = ('name', 'args', 'defaults', 'body')
class CallBlock(Stmt):
"""Like a macro without a name but a call instead. `call` is called with
the unnamed macro as `caller` argument this node holds.
"""
fields = ('call', 'args', 'defaults', 'body')
class FilterBlock(Stmt):
"""Node for filter sections."""
fields = ('body', 'filter')
class Block(Stmt):
"""A node that represents a block."""
fields = ('name', 'body', 'scoped')
class Include(Stmt):
"""A node that represents the include tag."""
fields = ('template', 'with_context', 'ignore_missing')
class Import(Stmt):
"""A node that represents the import tag."""
fields = ('template', 'target', 'with_context')
class FromImport(Stmt):
"""A node that represents the from import tag. It's important to not
pass unsafe names to the name attribute. The compiler translates the
attribute lookups directly into getattr calls and does *not* use the
subscript callback of the interface. As exported variables may not
start with double underscores (which the parser asserts) this is not a
problem for regular Jinja code, but if this node is used in an extension
extra care must be taken.
The list of names may contain tuples if aliases are wanted.
"""
fields = ('template', 'names', 'with_context')
class ExprStmt(Stmt):
"""A statement that evaluates an expression and discards the result."""
fields = ('node',)
class Assign(Stmt):
"""Assigns an expression to a target."""
fields = ('target', 'node')
class Expr(Node):
"""Baseclass for all expressions."""
abstract = True
def as_const(self, eval_ctx=None):
"""Return the value of the expression as constant or raise
:exc:`Impossible` if this was not possible.
An :class:`EvalContext` can be provided, if none is given
a default context is created which requires the nodes to have
an attached environment.
.. versionchanged:: 2.4
the `eval_ctx` parameter was added.
"""
raise Impossible()
def can_assign(self):
"""Check if it's possible to assign something to this node."""
return False
class BinExpr(Expr):
"""Baseclass for all binary expressions."""
fields = ('left', 'right')
operator = None
abstract = True
def as_const(self, eval_ctx=None):
eval_ctx = get_eval_context(self, eval_ctx)
# intercepted operators cannot be folded at compile time
if self.environment.sandboxed and \
self.operator in self.environment.intercepted_binops:
raise Impossible()
f = _binop_to_func[self.operator]
try:
return f(self.left.as_const(eval_ctx), self.right.as_const(eval_ctx))
except Exception:
raise Impossible()
class UnaryExpr(Expr):
"""Baseclass for all unary expressions."""
fields = ('node',)
operator = None
abstract = True
def as_const(self, eval_ctx=None):
eval_ctx = get_eval_context(self, eval_ctx)
# intercepted operators cannot be folded at compile time
if self.environment.sandboxed and \
self.operator in self.environment.intercepted_unops:
raise Impossible()
f = _uaop_to_func[self.operator]
try:
return f(self.node.as_const(eval_ctx))
except Exception:
raise Impossible()
class Name(Expr):
"""Looks up a name or stores a value in a name.
The `ctx` of the node can be one of the following values:
- `store`: store a value in the name
- `load`: load that name
- `param`: like `store` but if the name was defined as function parameter.
"""
fields = ('name', 'ctx')
def can_assign(self):
return self.name not in ('true', 'false', 'none',
'True', 'False', 'None')
class Literal(Expr):
"""Baseclass for literals."""
abstract = True
class Const(Literal):
"""All constant values. The parser will return this node for simple
constants such as ``42`` or ``"foo"`` but it can be used to store more
complex values such as lists too. Only constants with a safe
representation (objects where ``eval(repr(x)) == x`` is true).
"""
fields = ('value',)
def as_const(self, eval_ctx=None):
return self.value
@classmethod
def from_untrusted(cls, value, lineno=None, environment=None):
"""Return a const object if the value is representable as
constant value in the generated code, otherwise it will raise
an `Impossible` exception.
"""
from .compiler import has_safe_repr
if not has_safe_repr(value):
raise Impossible()
return cls(value, lineno=lineno, environment=environment)
class TemplateData(Literal):
"""A constant template string."""
fields = ('data',)
def as_const(self, eval_ctx=None):
eval_ctx = get_eval_context(self, eval_ctx)
if eval_ctx.volatile:
raise Impossible()
if eval_ctx.autoescape:
return Markup(self.data)
return self.data
class Tuple(Literal):
"""For loop unpacking and some other things like multiple arguments
for subscripts. Like for :class:`Name` `ctx` specifies if the tuple
is used for loading the names or storing.
"""
fields = ('items', 'ctx')
def as_const(self, eval_ctx=None):
eval_ctx = get_eval_context(self, eval_ctx)
return tuple(x.as_const(eval_ctx) for x in self.items)
def can_assign(self):
for item in self.items:
if not item.can_assign():
return False
return True
class List(Literal):
"""Any list literal such as ``[1, 2, 3]``"""
fields = ('items',)
def as_const(self, eval_ctx=None):
eval_ctx = get_eval_context(self, eval_ctx)
return [x.as_const(eval_ctx) for x in self.items]
class Dict(Literal):
"""Any dict literal such as ``{1: 2, 3: 4}``. The items must be a list of
:class:`Pair` nodes.
"""
fields = ('items',)
def as_const(self, eval_ctx=None):
eval_ctx = get_eval_context(self, eval_ctx)
return dict(x.as_const(eval_ctx) for x in self.items)
class Pair(Helper):
"""A key, value pair for dicts."""
fields = ('key', 'value')
def as_const(self, eval_ctx=None):
eval_ctx = get_eval_context(self, eval_ctx)
return self.key.as_const(eval_ctx), self.value.as_const(eval_ctx)
class Keyword(Helper):
"""A key, value pair for keyword arguments where key is a string."""
fields = ('key', 'value')
def as_const(self, eval_ctx=None):
eval_ctx = get_eval_context(self, eval_ctx)
return self.key, self.value.as_const(eval_ctx)
class CondExpr(Expr):
"""A conditional expression (inline if expression). (``{{
foo if bar else baz }}``)
"""
fields = ('test', 'expr1', 'expr2')
def as_const(self, eval_ctx=None):
eval_ctx = get_eval_context(self, eval_ctx)
if self.test.as_const(eval_ctx):
return self.expr1.as_const(eval_ctx)
# if we evaluate to an undefined object, we better do that at runtime
if self.expr2 is None:
raise Impossible()
return self.expr2.as_const(eval_ctx)
class Filter(Expr):
"""This node applies a filter on an expression. `name` is the name of
the filter, the rest of the fields are the same as for :class:`Call`.
If the `node` of a filter is `None` the contents of the last buffer are
filtered. Buffers are created by macros and filter blocks.
"""
fields = ('node', 'name', 'args', 'kwargs', 'dyn_args', 'dyn_kwargs')
def as_const(self, eval_ctx=None):
eval_ctx = get_eval_context(self, eval_ctx)
if eval_ctx.volatile or self.node is None:
raise Impossible()
# we have to be careful here because we call filter_ below.
# if this variable would be called filter, 2to3 would wrap the
# call in a list beause it is assuming we are talking about the
# builtin filter function here which no longer returns a list in
# python 3. because of that, do not rename filter_ to filter!
filter_ = self.environment.filters.get(self.name)
if filter_ is None or getattr(filter_, 'contextfilter', False):
raise Impossible()
obj = self.node.as_const(eval_ctx)
args = [x.as_const(eval_ctx) for x in self.args]
if getattr(filter_, 'evalcontextfilter', False):
args.insert(0, eval_ctx)
elif getattr(filter_, 'environmentfilter', False):
args.insert(0, self.environment)
kwargs = dict(x.as_const(eval_ctx) for x in self.kwargs)
if self.dyn_args is not None:
try:
args.extend(self.dyn_args.as_const(eval_ctx))
except Exception:
raise Impossible()
if self.dyn_kwargs is not None:
try:
kwargs.update(self.dyn_kwargs.as_const(eval_ctx))
except Exception:
raise Impossible()
try:
return filter_(obj, *args, **kwargs)
except Exception:
raise Impossible()
class Test(Expr):
"""Applies a test on an expression. `name` is the name of the test, the
rest of the fields are the same as for :class:`Call`.
"""
fields = ('node', 'name', 'args', 'kwargs', 'dyn_args', 'dyn_kwargs')
class Call(Expr):
"""Calls an expression. `args` is a list of arguments, `kwargs` a list
of keyword arguments (list of :class:`Keyword` nodes), and `dyn_args`
and `dyn_kwargs` has to be either `None` or a node that is used as
node for dynamic positional (``*args``) or keyword (``**kwargs``)
arguments.
"""
fields = ('node', 'args', 'kwargs', 'dyn_args', 'dyn_kwargs')
def as_const(self, eval_ctx=None):
eval_ctx = get_eval_context(self, eval_ctx)
if eval_ctx.volatile:
raise Impossible()
obj = self.node.as_const(eval_ctx)
# don't evaluate context functions
args = [x.as_const(eval_ctx) for x in self.args]
if isinstance(obj, _context_function_types):
if getattr(obj, 'contextfunction', False):
raise Impossible()
elif getattr(obj, 'evalcontextfunction', False):
args.insert(0, eval_ctx)
elif getattr(obj, 'environmentfunction', False):
args.insert(0, self.environment)
kwargs = dict(x.as_const(eval_ctx) for x in self.kwargs)
if self.dyn_args is not None:
try:
args.extend(self.dyn_args.as_const(eval_ctx))
except Exception:
raise Impossible()
if self.dyn_kwargs is not None:
try:
kwargs.update(self.dyn_kwargs.as_const(eval_ctx))
except Exception:
raise Impossible()
try:
return obj(*args, **kwargs)
except Exception:
raise Impossible()
class Getitem(Expr):
"""Get an attribute or item from an expression and prefer the item."""
fields = ('node', 'arg', 'ctx')
def as_const(self, eval_ctx=None):
eval_ctx = get_eval_context(self, eval_ctx)
if self.ctx != 'load':
raise Impossible()
try:
return self.environment.getitem(self.node.as_const(eval_ctx),
self.arg.as_const(eval_ctx))
except Exception:
raise Impossible()
def can_assign(self):
return False
class Getattr(Expr):
"""Get an attribute or item from an expression that is a ascii-only
bytestring and prefer the attribute.
"""
fields = ('node', 'attr', 'ctx')
def as_const(self, eval_ctx=None):
if self.ctx != 'load':
raise Impossible()
try:
eval_ctx = get_eval_context(self, eval_ctx)
return self.environment.getattr(self.node.as_const(eval_ctx),
self.attr)
except Exception:
raise Impossible()
def can_assign(self):
return False
class Slice(Expr):
"""Represents a slice object. This must only be used as argument for
:class:`Subscript`.
"""
fields = ('start', 'stop', 'step')
def as_const(self, eval_ctx=None):
eval_ctx = get_eval_context(self, eval_ctx)
def const(obj):
if obj is None:
return None
return obj.as_const(eval_ctx)
return slice(const(self.start), const(self.stop), const(self.step))
class Concat(Expr):
"""Concatenates the list of expressions provided after converting them to
unicode.
"""
fields = ('nodes',)
def as_const(self, eval_ctx=None):
eval_ctx = get_eval_context(self, eval_ctx)
return ''.join(text_type(x.as_const(eval_ctx)) for x in self.nodes)
class Compare(Expr):
"""Compares an expression with some other expressions. `ops` must be a
list of :class:`Operand`\s.
"""
fields = ('expr', 'ops')
def as_const(self, eval_ctx=None):
eval_ctx = get_eval_context(self, eval_ctx)
result = value = self.expr.as_const(eval_ctx)
try:
for op in self.ops:
new_value = op.expr.as_const(eval_ctx)
result = _cmpop_to_func[op.op](value, new_value)
value = new_value
except Exception:
raise Impossible()
return result
class Operand(Helper):
"""Holds an operator and an expression."""
fields = ('op', 'expr')
if __debug__:
Operand.__doc__ += '\nThe following operators are available: ' + \
', '.join(sorted('``%s``' % x for x in set(_binop_to_func) |
set(_uaop_to_func) | set(_cmpop_to_func)))
class Mul(BinExpr):
"""Multiplies the left with the right node."""
operator = '*'
class Div(BinExpr):
"""Divides the left by the right node."""
operator = '/'
class FloorDiv(BinExpr):
"""Divides the left by the right node and truncates conver the
result into an integer by truncating.
"""
operator = '//'
class Add(BinExpr):
"""Add the left to the right node."""
operator = '+'
class Sub(BinExpr):
"""Substract the right from the left node."""
operator = '-'
class Mod(BinExpr):
"""Left modulo right."""
operator = '%'
class Pow(BinExpr):
"""Left to the power of right."""
operator = '**'
class And(BinExpr):
"""Short circuited AND."""
operator = 'and'
def as_const(self, eval_ctx=None):
eval_ctx = get_eval_context(self, eval_ctx)
return self.left.as_const(eval_ctx) and self.right.as_const(eval_ctx)
class Or(BinExpr):
"""Short circuited OR."""
operator = 'or'
def as_const(self, eval_ctx=None):
eval_ctx = get_eval_context(self, eval_ctx)
return self.left.as_const(eval_ctx) or self.right.as_const(eval_ctx)
class Not(UnaryExpr):
"""Negate the expression."""
operator = 'not'
class Neg(UnaryExpr):
"""Make the expression negative."""
operator = '-'
class Pos(UnaryExpr):
"""Make the expression positive (noop for most expressions)"""
operator = '+'
# Helpers for extensions
class EnvironmentAttribute(Expr):
"""Loads an attribute from the environment object. This is useful for
extensions that want to call a callback stored on the environment.
"""
fields = ('name',)
class ExtensionAttribute(Expr):
"""Returns the attribute of an extension bound to the environment.
The identifier is the identifier of the :class:`Extension`.
This node is usually constructed by calling the
:meth:`~jinja2.ext.Extension.attr` method on an extension.
"""
fields = ('identifier', 'name')
class ImportedName(Expr):
"""If created with an import name the import name is returned on node
access. For example ``ImportedName('cgi.escape')`` returns the `escape`
function from the cgi module on evaluation. Imports are optimized by the
compiler so there is no need to assign them to local variables.
"""
fields = ('importname',)
class InternalName(Expr):
"""An internal name in the compiler. You cannot create these nodes
yourself but the parser provides a
:meth:`~jinja2.parser.Parser.free_identifier` method that creates
a new identifier for you. This identifier is not available from the
template and is not threated specially by the compiler.
"""
fields = ('name',)
def __init__(self):
raise TypeError('Can\'t create internal names. Use the '
'`free_identifier` method on a parser.')
class MarkSafe(Expr):
"""Mark the wrapped expression as safe (wrap it as `Markup`)."""
fields = ('expr',)
def as_const(self, eval_ctx=None):
eval_ctx = get_eval_context(self, eval_ctx)
return Markup(self.expr.as_const(eval_ctx))
class MarkSafeIfAutoescape(Expr):
"""Mark the wrapped expression as safe (wrap it as `Markup`) but
only if autoescaping is active.
.. versionadded:: 2.5
"""
fields = ('expr',)
def as_const(self, eval_ctx=None):
eval_ctx = get_eval_context(self, eval_ctx)
if eval_ctx.volatile:
raise Impossible()
expr = self.expr.as_const(eval_ctx)
if eval_ctx.autoescape:
return Markup(expr)
return expr
class ContextReference(Expr):
"""Returns the current template context. It can be used like a
:class:`Name` node, with a ``'load'`` ctx and will return the
current :class:`~jinja2.runtime.Context` object.
Here an example that assigns the current template name to a
variable named `foo`::
Assign(Name('foo', ctx='store'),
Getattr(ContextReference(), 'name'))
"""
class Continue(Stmt):
"""Continue a loop."""
class Break(Stmt):
"""Break a loop."""
class Scope(Stmt):
"""An artificial scope."""
fields = ('body',)
class EvalContextModifier(Stmt):
"""Modifies the eval context. For each option that should be modified,
a :class:`Keyword` has to be added to the :attr:`options` list.
Example to change the `autoescape` setting::
EvalContextModifier(options=[Keyword('autoescape', Const(True))])
"""
fields = ('options',)
class ScopedEvalContextModifier(EvalContextModifier):
"""Modifies the eval context and reverts it later. Works exactly like
:class:`EvalContextModifier` but will only modify the
:class:`~jinja2.nodes.EvalContext` for nodes in the :attr:`body`.
"""
fields = ('body',)
# make sure nobody creates custom nodes
def _failing_new(*args, **kwargs):
raise TypeError('can\'t create custom node types')
NodeType.__new__ = staticmethod(_failing_new); del _failing_new

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# -*- coding: utf-8 -*-
"""
jinja2.optimizer
~~~~~~~~~~~~~~~~
The jinja optimizer is currently trying to constant fold a few expressions
and modify the AST in place so that it should be easier to evaluate it.
Because the AST does not contain all the scoping information and the
compiler has to find that out, we cannot do all the optimizations we
want. For example loop unrolling doesn't work because unrolled loops would
have a different scoping.
The solution would be a second syntax tree that has the scoping rules stored.
:copyright: (c) 2010 by the Jinja Team.
:license: BSD.
"""
from jinja2 import nodes
from jinja2.visitor import NodeTransformer
def optimize(node, environment):
"""The context hint can be used to perform an static optimization
based on the context given."""
optimizer = Optimizer(environment)
return optimizer.visit(node)
class Optimizer(NodeTransformer):
def __init__(self, environment):
self.environment = environment
def visit_If(self, node):
"""Eliminate dead code."""
# do not optimize ifs that have a block inside so that it doesn't
# break super().
if node.find(nodes.Block) is not None:
return self.generic_visit(node)
try:
val = self.visit(node.test).as_const()
except nodes.Impossible:
return self.generic_visit(node)
if val:
body = node.body
else:
body = node.else_
result = []
for node in body:
result.extend(self.visit_list(node))
return result
def fold(self, node):
"""Do constant folding."""
node = self.generic_visit(node)
try:
return nodes.Const.from_untrusted(node.as_const(),
lineno=node.lineno,
environment=self.environment)
except nodes.Impossible:
return node
visit_Add = visit_Sub = visit_Mul = visit_Div = visit_FloorDiv = \
visit_Pow = visit_Mod = visit_And = visit_Or = visit_Pos = visit_Neg = \
visit_Not = visit_Compare = visit_Getitem = visit_Getattr = visit_Call = \
visit_Filter = visit_Test = visit_CondExpr = fold
del fold

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# -*- coding: utf-8 -*-
"""
jinja2.parser
~~~~~~~~~~~~~
Implements the template parser.
:copyright: (c) 2010 by the Jinja Team.
:license: BSD, see LICENSE for more details.
"""
from jinja2 import nodes
from jinja2.exceptions import TemplateSyntaxError, TemplateAssertionError
from jinja2.lexer import describe_token, describe_token_expr
from jinja2._compat import next, imap
#: statements that callinto
_statement_keywords = frozenset(['for', 'if', 'block', 'extends', 'print',
'macro', 'include', 'from', 'import',
'set'])
_compare_operators = frozenset(['eq', 'ne', 'lt', 'lteq', 'gt', 'gteq'])
class Parser(object):
"""This is the central parsing class Jinja2 uses. It's passed to
extensions and can be used to parse expressions or statements.
"""
def __init__(self, environment, source, name=None, filename=None,
state=None):
self.environment = environment
self.stream = environment._tokenize(source, name, filename, state)
self.name = name
self.filename = filename
self.closed = False
self.extensions = {}
for extension in environment.iter_extensions():
for tag in extension.tags:
self.extensions[tag] = extension.parse
self._last_identifier = 0
self._tag_stack = []
self._end_token_stack = []
def fail(self, msg, lineno=None, exc=TemplateSyntaxError):
"""Convenience method that raises `exc` with the message, passed
line number or last line number as well as the current name and
filename.
"""
if lineno is None:
lineno = self.stream.current.lineno
raise exc(msg, lineno, self.name, self.filename)
def _fail_ut_eof(self, name, end_token_stack, lineno):
expected = []
for exprs in end_token_stack:
expected.extend(imap(describe_token_expr, exprs))
if end_token_stack:
currently_looking = ' or '.join(
"'%s'" % describe_token_expr(expr)
for expr in end_token_stack[-1])
else:
currently_looking = None
if name is None:
message = ['Unexpected end of template.']
else:
message = ['Encountered unknown tag \'%s\'.' % name]
if currently_looking:
if name is not None and name in expected:
message.append('You probably made a nesting mistake. Jinja '
'is expecting this tag, but currently looking '
'for %s.' % currently_looking)
else:
message.append('Jinja was looking for the following tags: '
'%s.' % currently_looking)
if self._tag_stack:
message.append('The innermost block that needs to be '
'closed is \'%s\'.' % self._tag_stack[-1])
self.fail(' '.join(message), lineno)
def fail_unknown_tag(self, name, lineno=None):
"""Called if the parser encounters an unknown tag. Tries to fail
with a human readable error message that could help to identify
the problem.
"""
return self._fail_ut_eof(name, self._end_token_stack, lineno)
def fail_eof(self, end_tokens=None, lineno=None):
"""Like fail_unknown_tag but for end of template situations."""
stack = list(self._end_token_stack)
if end_tokens is not None:
stack.append(end_tokens)
return self._fail_ut_eof(None, stack, lineno)
def is_tuple_end(self, extra_end_rules=None):
"""Are we at the end of a tuple?"""
if self.stream.current.type in ('variable_end', 'block_end', 'rparen'):
return True
elif extra_end_rules is not None:
return self.stream.current.test_any(extra_end_rules)
return False
def free_identifier(self, lineno=None):
"""Return a new free identifier as :class:`~jinja2.nodes.InternalName`."""
self._last_identifier += 1
rv = object.__new__(nodes.InternalName)
nodes.Node.__init__(rv, 'fi%d' % self._last_identifier, lineno=lineno)
return rv
def parse_statement(self):
"""Parse a single statement."""
token = self.stream.current
if token.type != 'name':
self.fail('tag name expected', token.lineno)
self._tag_stack.append(token.value)
pop_tag = True
try:
if token.value in _statement_keywords:
return getattr(self, 'parse_' + self.stream.current.value)()
if token.value == 'call':
return self.parse_call_block()
if token.value == 'filter':
return self.parse_filter_block()
ext = self.extensions.get(token.value)
if ext is not None:
return ext(self)
# did not work out, remove the token we pushed by accident
# from the stack so that the unknown tag fail function can
# produce a proper error message.
self._tag_stack.pop()
pop_tag = False
self.fail_unknown_tag(token.value, token.lineno)
finally:
if pop_tag:
self._tag_stack.pop()
def parse_statements(self, end_tokens, drop_needle=False):
"""Parse multiple statements into a list until one of the end tokens
is reached. This is used to parse the body of statements as it also
parses template data if appropriate. The parser checks first if the
current token is a colon and skips it if there is one. Then it checks
for the block end and parses until if one of the `end_tokens` is
reached. Per default the active token in the stream at the end of
the call is the matched end token. If this is not wanted `drop_needle`
can be set to `True` and the end token is removed.
"""
# the first token may be a colon for python compatibility
self.stream.skip_if('colon')
# in the future it would be possible to add whole code sections
# by adding some sort of end of statement token and parsing those here.
self.stream.expect('block_end')
result = self.subparse(end_tokens)
# we reached the end of the template too early, the subparser
# does not check for this, so we do that now
if self.stream.current.type == 'eof':
self.fail_eof(end_tokens)
if drop_needle:
next(self.stream)
return result
def parse_set(self):
"""Parse an assign statement."""
lineno = next(self.stream).lineno
target = self.parse_assign_target()
self.stream.expect('assign')
expr = self.parse_tuple()
return nodes.Assign(target, expr, lineno=lineno)
def parse_for(self):
"""Parse a for loop."""
lineno = self.stream.expect('name:for').lineno
target = self.parse_assign_target(extra_end_rules=('name:in',))
self.stream.expect('name:in')
iter = self.parse_tuple(with_condexpr=False,
extra_end_rules=('name:recursive',))
test = None
if self.stream.skip_if('name:if'):
test = self.parse_expression()
recursive = self.stream.skip_if('name:recursive')
body = self.parse_statements(('name:endfor', 'name:else'))
if next(self.stream).value == 'endfor':
else_ = []
else:
else_ = self.parse_statements(('name:endfor',), drop_needle=True)
return nodes.For(target, iter, body, else_, test,
recursive, lineno=lineno)
def parse_if(self):
"""Parse an if construct."""
node = result = nodes.If(lineno=self.stream.expect('name:if').lineno)
while 1:
node.test = self.parse_tuple(with_condexpr=False)
node.body = self.parse_statements(('name:elif', 'name:else',
'name:endif'))
token = next(self.stream)
if token.test('name:elif'):
new_node = nodes.If(lineno=self.stream.current.lineno)
node.else_ = [new_node]
node = new_node
continue
elif token.test('name:else'):
node.else_ = self.parse_statements(('name:endif',),
drop_needle=True)
else:
node.else_ = []
break
return result
def parse_block(self):
node = nodes.Block(lineno=next(self.stream).lineno)
node.name = self.stream.expect('name').value
node.scoped = self.stream.skip_if('name:scoped')
# common problem people encounter when switching from django
# to jinja. we do not support hyphens in block names, so let's
# raise a nicer error message in that case.
if self.stream.current.type == 'sub':
self.fail('Block names in Jinja have to be valid Python '
'identifiers and may not contain hyphens, use an '
'underscore instead.')
node.body = self.parse_statements(('name:endblock',), drop_needle=True)
self.stream.skip_if('name:' + node.name)
return node
def parse_extends(self):
node = nodes.Extends(lineno=next(self.stream).lineno)
node.template = self.parse_expression()
return node
def parse_import_context(self, node, default):
if self.stream.current.test_any('name:with', 'name:without') and \
self.stream.look().test('name:context'):
node.with_context = next(self.stream).value == 'with'
self.stream.skip()
else:
node.with_context = default
return node
def parse_include(self):
node = nodes.Include(lineno=next(self.stream).lineno)
node.template = self.parse_expression()
if self.stream.current.test('name:ignore') and \
self.stream.look().test('name:missing'):
node.ignore_missing = True
self.stream.skip(2)
else:
node.ignore_missing = False
return self.parse_import_context(node, True)
def parse_import(self):
node = nodes.Import(lineno=next(self.stream).lineno)
node.template = self.parse_expression()
self.stream.expect('name:as')
node.target = self.parse_assign_target(name_only=True).name
return self.parse_import_context(node, False)
def parse_from(self):
node = nodes.FromImport(lineno=next(self.stream).lineno)
node.template = self.parse_expression()
self.stream.expect('name:import')
node.names = []
def parse_context():
if self.stream.current.value in ('with', 'without') and \
self.stream.look().test('name:context'):
node.with_context = next(self.stream).value == 'with'
self.stream.skip()
return True
return False
while 1:
if node.names:
self.stream.expect('comma')
if self.stream.current.type == 'name':
if parse_context():
break
target = self.parse_assign_target(name_only=True)
if target.name.startswith('_'):
self.fail('names starting with an underline can not '
'be imported', target.lineno,
exc=TemplateAssertionError)
if self.stream.skip_if('name:as'):
alias = self.parse_assign_target(name_only=True)
node.names.append((target.name, alias.name))
else:
node.names.append(target.name)
if parse_context() or self.stream.current.type != 'comma':
break
else:
break
if not hasattr(node, 'with_context'):
node.with_context = False
self.stream.skip_if('comma')
return node
def parse_signature(self, node):
node.args = args = []
node.defaults = defaults = []
self.stream.expect('lparen')
while self.stream.current.type != 'rparen':
if args:
self.stream.expect('comma')
arg = self.parse_assign_target(name_only=True)
arg.set_ctx('param')
if self.stream.skip_if('assign'):
defaults.append(self.parse_expression())
args.append(arg)
self.stream.expect('rparen')
def parse_call_block(self):
node = nodes.CallBlock(lineno=next(self.stream).lineno)
if self.stream.current.type == 'lparen':
self.parse_signature(node)
else:
node.args = []
node.defaults = []
node.call = self.parse_expression()
if not isinstance(node.call, nodes.Call):
self.fail('expected call', node.lineno)
node.body = self.parse_statements(('name:endcall',), drop_needle=True)
return node
def parse_filter_block(self):
node = nodes.FilterBlock(lineno=next(self.stream).lineno)
node.filter = self.parse_filter(None, start_inline=True)
node.body = self.parse_statements(('name:endfilter',),
drop_needle=True)
return node
def parse_macro(self):
node = nodes.Macro(lineno=next(self.stream).lineno)
node.name = self.parse_assign_target(name_only=True).name
self.parse_signature(node)
node.body = self.parse_statements(('name:endmacro',),
drop_needle=True)
return node
def parse_print(self):
node = nodes.Output(lineno=next(self.stream).lineno)
node.nodes = []
while self.stream.current.type != 'block_end':
if node.nodes:
self.stream.expect('comma')
node.nodes.append(self.parse_expression())
return node
def parse_assign_target(self, with_tuple=True, name_only=False,
extra_end_rules=None):
"""Parse an assignment target. As Jinja2 allows assignments to
tuples, this function can parse all allowed assignment targets. Per
default assignments to tuples are parsed, that can be disable however
by setting `with_tuple` to `False`. If only assignments to names are
wanted `name_only` can be set to `True`. The `extra_end_rules`
parameter is forwarded to the tuple parsing function.
"""
if name_only:
token = self.stream.expect('name')
target = nodes.Name(token.value, 'store', lineno=token.lineno)
else:
if with_tuple:
target = self.parse_tuple(simplified=True,
extra_end_rules=extra_end_rules)
else:
target = self.parse_primary()
target.set_ctx('store')
if not target.can_assign():
self.fail('can\'t assign to %r' % target.__class__.
__name__.lower(), target.lineno)
return target
def parse_expression(self, with_condexpr=True):
"""Parse an expression. Per default all expressions are parsed, if
the optional `with_condexpr` parameter is set to `False` conditional
expressions are not parsed.
"""
if with_condexpr:
return self.parse_condexpr()
return self.parse_or()
def parse_condexpr(self):
lineno = self.stream.current.lineno
expr1 = self.parse_or()
while self.stream.skip_if('name:if'):
expr2 = self.parse_or()
if self.stream.skip_if('name:else'):
expr3 = self.parse_condexpr()
else:
expr3 = None
expr1 = nodes.CondExpr(expr2, expr1, expr3, lineno=lineno)
lineno = self.stream.current.lineno
return expr1
def parse_or(self):
lineno = self.stream.current.lineno
left = self.parse_and()
while self.stream.skip_if('name:or'):
right = self.parse_and()
left = nodes.Or(left, right, lineno=lineno)
lineno = self.stream.current.lineno
return left
def parse_and(self):
lineno = self.stream.current.lineno
left = self.parse_not()
while self.stream.skip_if('name:and'):
right = self.parse_not()
left = nodes.And(left, right, lineno=lineno)
lineno = self.stream.current.lineno
return left
def parse_not(self):
if self.stream.current.test('name:not'):
lineno = next(self.stream).lineno
return nodes.Not(self.parse_not(), lineno=lineno)
return self.parse_compare()
def parse_compare(self):
lineno = self.stream.current.lineno
expr = self.parse_add()
ops = []
while 1:
token_type = self.stream.current.type
if token_type in _compare_operators:
next(self.stream)
ops.append(nodes.Operand(token_type, self.parse_add()))
elif self.stream.skip_if('name:in'):
ops.append(nodes.Operand('in', self.parse_add()))
elif self.stream.current.test('name:not') and \
self.stream.look().test('name:in'):
self.stream.skip(2)
ops.append(nodes.Operand('notin', self.parse_add()))
else:
break
lineno = self.stream.current.lineno
if not ops:
return expr
return nodes.Compare(expr, ops, lineno=lineno)
def parse_add(self):
lineno = self.stream.current.lineno
left = self.parse_sub()
while self.stream.current.type == 'add':
next(self.stream)
right = self.parse_sub()
left = nodes.Add(left, right, lineno=lineno)
lineno = self.stream.current.lineno
return left
def parse_sub(self):
lineno = self.stream.current.lineno
left = self.parse_concat()
while self.stream.current.type == 'sub':
next(self.stream)
right = self.parse_concat()
left = nodes.Sub(left, right, lineno=lineno)
lineno = self.stream.current.lineno
return left
def parse_concat(self):
lineno = self.stream.current.lineno
args = [self.parse_mul()]
while self.stream.current.type == 'tilde':
next(self.stream)
args.append(self.parse_mul())
if len(args) == 1:
return args[0]
return nodes.Concat(args, lineno=lineno)
def parse_mul(self):
lineno = self.stream.current.lineno
left = self.parse_div()
while self.stream.current.type == 'mul':
next(self.stream)
right = self.parse_div()
left = nodes.Mul(left, right, lineno=lineno)
lineno = self.stream.current.lineno
return left
def parse_div(self):
lineno = self.stream.current.lineno
left = self.parse_floordiv()
while self.stream.current.type == 'div':
next(self.stream)
right = self.parse_floordiv()
left = nodes.Div(left, right, lineno=lineno)
lineno = self.stream.current.lineno
return left
def parse_floordiv(self):
lineno = self.stream.current.lineno
left = self.parse_mod()
while self.stream.current.type == 'floordiv':
next(self.stream)
right = self.parse_mod()
left = nodes.FloorDiv(left, right, lineno=lineno)
lineno = self.stream.current.lineno
return left
def parse_mod(self):
lineno = self.stream.current.lineno
left = self.parse_pow()
while self.stream.current.type == 'mod':
next(self.stream)
right = self.parse_pow()
left = nodes.Mod(left, right, lineno=lineno)
lineno = self.stream.current.lineno
return left
def parse_pow(self):
lineno = self.stream.current.lineno
left = self.parse_unary()
while self.stream.current.type == 'pow':
next(self.stream)
right = self.parse_unary()
left = nodes.Pow(left, right, lineno=lineno)
lineno = self.stream.current.lineno
return left
def parse_unary(self, with_filter=True):
token_type = self.stream.current.type
lineno = self.stream.current.lineno
if token_type == 'sub':
next(self.stream)
node = nodes.Neg(self.parse_unary(False), lineno=lineno)
elif token_type == 'add':
next(self.stream)
node = nodes.Pos(self.parse_unary(False), lineno=lineno)
else:
node = self.parse_primary()
node = self.parse_postfix(node)
if with_filter:
node = self.parse_filter_expr(node)
return node
def parse_primary(self):
token = self.stream.current
if token.type == 'name':
if token.value in ('true', 'false', 'True', 'False'):
node = nodes.Const(token.value in ('true', 'True'),
lineno=token.lineno)
elif token.value in ('none', 'None'):
node = nodes.Const(None, lineno=token.lineno)
else:
node = nodes.Name(token.value, 'load', lineno=token.lineno)
next(self.stream)
elif token.type == 'string':
next(self.stream)
buf = [token.value]
lineno = token.lineno
while self.stream.current.type == 'string':
buf.append(self.stream.current.value)
next(self.stream)
node = nodes.Const(''.join(buf), lineno=lineno)
elif token.type in ('integer', 'float'):
next(self.stream)
node = nodes.Const(token.value, lineno=token.lineno)
elif token.type == 'lparen':
next(self.stream)
node = self.parse_tuple(explicit_parentheses=True)
self.stream.expect('rparen')
elif token.type == 'lbracket':
node = self.parse_list()
elif token.type == 'lbrace':
node = self.parse_dict()
else:
self.fail("unexpected '%s'" % describe_token(token), token.lineno)
return node
def parse_tuple(self, simplified=False, with_condexpr=True,
extra_end_rules=None, explicit_parentheses=False):
"""Works like `parse_expression` but if multiple expressions are
delimited by a comma a :class:`~jinja2.nodes.Tuple` node is created.
This method could also return a regular expression instead of a tuple
if no commas where found.
The default parsing mode is a full tuple. If `simplified` is `True`
only names and literals are parsed. The `no_condexpr` parameter is
forwarded to :meth:`parse_expression`.
Because tuples do not require delimiters and may end in a bogus comma
an extra hint is needed that marks the end of a tuple. For example
for loops support tuples between `for` and `in`. In that case the
`extra_end_rules` is set to ``['name:in']``.
`explicit_parentheses` is true if the parsing was triggered by an
expression in parentheses. This is used to figure out if an empty
tuple is a valid expression or not.
"""
lineno = self.stream.current.lineno
if simplified:
parse = self.parse_primary
elif with_condexpr:
parse = self.parse_expression
else:
parse = lambda: self.parse_expression(with_condexpr=False)
args = []
is_tuple = False
while 1:
if args:
self.stream.expect('comma')
if self.is_tuple_end(extra_end_rules):
break
args.append(parse())
if self.stream.current.type == 'comma':
is_tuple = True
else:
break
lineno = self.stream.current.lineno
if not is_tuple:
if args:
return args[0]
# if we don't have explicit parentheses, an empty tuple is
# not a valid expression. This would mean nothing (literally
# nothing) in the spot of an expression would be an empty
# tuple.
if not explicit_parentheses:
self.fail('Expected an expression, got \'%s\'' %
describe_token(self.stream.current))
return nodes.Tuple(args, 'load', lineno=lineno)
def parse_list(self):
token = self.stream.expect('lbracket')
items = []
while self.stream.current.type != 'rbracket':
if items:
self.stream.expect('comma')
if self.stream.current.type == 'rbracket':
break
items.append(self.parse_expression())
self.stream.expect('rbracket')
return nodes.List(items, lineno=token.lineno)
def parse_dict(self):
token = self.stream.expect('lbrace')
items = []
while self.stream.current.type != 'rbrace':
if items:
self.stream.expect('comma')
if self.stream.current.type == 'rbrace':
break
key = self.parse_expression()
self.stream.expect('colon')
value = self.parse_expression()
items.append(nodes.Pair(key, value, lineno=key.lineno))
self.stream.expect('rbrace')
return nodes.Dict(items, lineno=token.lineno)
def parse_postfix(self, node):
while 1:
token_type = self.stream.current.type
if token_type == 'dot' or token_type == 'lbracket':
node = self.parse_subscript(node)
# calls are valid both after postfix expressions (getattr
# and getitem) as well as filters and tests
elif token_type == 'lparen':
node = self.parse_call(node)
else:
break
return node
def parse_filter_expr(self, node):
while 1:
token_type = self.stream.current.type
if token_type == 'pipe':
node = self.parse_filter(node)
elif token_type == 'name' and self.stream.current.value == 'is':
node = self.parse_test(node)
# calls are valid both after postfix expressions (getattr
# and getitem) as well as filters and tests
elif token_type == 'lparen':
node = self.parse_call(node)
else:
break
return node
def parse_subscript(self, node):
token = next(self.stream)
if token.type == 'dot':
attr_token = self.stream.current
next(self.stream)
if attr_token.type == 'name':
return nodes.Getattr(node, attr_token.value, 'load',
lineno=token.lineno)
elif attr_token.type != 'integer':
self.fail('expected name or number', attr_token.lineno)
arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
if token.type == 'lbracket':
args = []
while self.stream.current.type != 'rbracket':
if args:
self.stream.expect('comma')
args.append(self.parse_subscribed())
self.stream.expect('rbracket')
if len(args) == 1:
arg = args[0]
else:
arg = nodes.Tuple(args, 'load', lineno=token.lineno)
return nodes.Getitem(node, arg, 'load', lineno=token.lineno)
self.fail('expected subscript expression', self.lineno)
def parse_subscribed(self):
lineno = self.stream.current.lineno
if self.stream.current.type == 'colon':
next(self.stream)
args = [None]
else:
node = self.parse_expression()
if self.stream.current.type != 'colon':
return node
next(self.stream)
args = [node]
if self.stream.current.type == 'colon':
args.append(None)
elif self.stream.current.type not in ('rbracket', 'comma'):
args.append(self.parse_expression())
else:
args.append(None)
if self.stream.current.type == 'colon':
next(self.stream)
if self.stream.current.type not in ('rbracket', 'comma'):
args.append(self.parse_expression())
else:
args.append(None)
else:
args.append(None)
return nodes.Slice(lineno=lineno, *args)
def parse_call(self, node):
token = self.stream.expect('lparen')
args = []
kwargs = []
dyn_args = dyn_kwargs = None
require_comma = False
def ensure(expr):
if not expr:
self.fail('invalid syntax for function call expression',
token.lineno)
while self.stream.current.type != 'rparen':
if require_comma:
self.stream.expect('comma')
# support for trailing comma
if self.stream.current.type == 'rparen':
break
if self.stream.current.type == 'mul':
ensure(dyn_args is None and dyn_kwargs is None)
next(self.stream)
dyn_args = self.parse_expression()
elif self.stream.current.type == 'pow':
ensure(dyn_kwargs is None)
next(self.stream)
dyn_kwargs = self.parse_expression()
else:
ensure(dyn_args is None and dyn_kwargs is None)
if self.stream.current.type == 'name' and \
self.stream.look().type == 'assign':
key = self.stream.current.value
self.stream.skip(2)
value = self.parse_expression()
kwargs.append(nodes.Keyword(key, value,
lineno=value.lineno))
else:
ensure(not kwargs)
args.append(self.parse_expression())
require_comma = True
self.stream.expect('rparen')
if node is None:
return args, kwargs, dyn_args, dyn_kwargs
return nodes.Call(node, args, kwargs, dyn_args, dyn_kwargs,
lineno=token.lineno)
def parse_filter(self, node, start_inline=False):
while self.stream.current.type == 'pipe' or start_inline:
if not start_inline:
next(self.stream)
token = self.stream.expect('name')
name = token.value
while self.stream.current.type == 'dot':
next(self.stream)
name += '.' + self.stream.expect('name').value
if self.stream.current.type == 'lparen':
args, kwargs, dyn_args, dyn_kwargs = self.parse_call(None)
else:
args = []
kwargs = []
dyn_args = dyn_kwargs = None
node = nodes.Filter(node, name, args, kwargs, dyn_args,
dyn_kwargs, lineno=token.lineno)
start_inline = False
return node
def parse_test(self, node):
token = next(self.stream)
if self.stream.current.test('name:not'):
next(self.stream)
negated = True
else:
negated = False
name = self.stream.expect('name').value
while self.stream.current.type == 'dot':
next(self.stream)
name += '.' + self.stream.expect('name').value
dyn_args = dyn_kwargs = None
kwargs = []
if self.stream.current.type == 'lparen':
args, kwargs, dyn_args, dyn_kwargs = self.parse_call(None)
elif self.stream.current.type in ('name', 'string', 'integer',
'float', 'lparen', 'lbracket',
'lbrace') and not \
self.stream.current.test_any('name:else', 'name:or',
'name:and'):
if self.stream.current.test('name:is'):
self.fail('You cannot chain multiple tests with is')
args = [self.parse_expression()]
else:
args = []
node = nodes.Test(node, name, args, kwargs, dyn_args,
dyn_kwargs, lineno=token.lineno)
if negated:
node = nodes.Not(node, lineno=token.lineno)
return node
def subparse(self, end_tokens=None):
body = []
data_buffer = []
add_data = data_buffer.append
if end_tokens is not None:
self._end_token_stack.append(end_tokens)
def flush_data():
if data_buffer:
lineno = data_buffer[0].lineno
body.append(nodes.Output(data_buffer[:], lineno=lineno))
del data_buffer[:]
try:
while self.stream:
token = self.stream.current
if token.type == 'data':
if token.value:
add_data(nodes.TemplateData(token.value,
lineno=token.lineno))
next(self.stream)
elif token.type == 'variable_begin':
next(self.stream)
add_data(self.parse_tuple(with_condexpr=True))
self.stream.expect('variable_end')
elif token.type == 'block_begin':
flush_data()
next(self.stream)
if end_tokens is not None and \
self.stream.current.test_any(*end_tokens):
return body
rv = self.parse_statement()
if isinstance(rv, list):
body.extend(rv)
else:
body.append(rv)
self.stream.expect('block_end')
else:
raise AssertionError('internal parsing error')
flush_data()
finally:
if end_tokens is not None:
self._end_token_stack.pop()
return body
def parse(self):
"""Parse the whole template into a `Template` node."""
result = nodes.Template(self.subparse(), lineno=1)
result.set_environment(self.environment)
return result

581
3rdparty/jinja2/runtime.py vendored
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@ -1,581 +0,0 @@
# -*- coding: utf-8 -*-
"""
jinja2.runtime
~~~~~~~~~~~~~~
Runtime helpers.
:copyright: (c) 2010 by the Jinja Team.
:license: BSD.
"""
from itertools import chain
from jinja2.nodes import EvalContext, _context_function_types
from jinja2.utils import Markup, soft_unicode, escape, missing, concat, \
internalcode, object_type_repr
from jinja2.exceptions import UndefinedError, TemplateRuntimeError, \
TemplateNotFound
from jinja2._compat import next, imap, text_type, iteritems, \
implements_iterator, implements_to_string, string_types, PY2
# these variables are exported to the template runtime
__all__ = ['LoopContext', 'TemplateReference', 'Macro', 'Markup',
'TemplateRuntimeError', 'missing', 'concat', 'escape',
'markup_join', 'unicode_join', 'to_string', 'identity',
'TemplateNotFound']
#: the name of the function that is used to convert something into
#: a string. We can just use the text type here.
to_string = text_type
#: the identity function. Useful for certain things in the environment
identity = lambda x: x
_last_iteration = object()
def markup_join(seq):
"""Concatenation that escapes if necessary and converts to unicode."""
buf = []
iterator = imap(soft_unicode, seq)
for arg in iterator:
buf.append(arg)
if hasattr(arg, '__html__'):
return Markup(u'').join(chain(buf, iterator))
return concat(buf)
def unicode_join(seq):
"""Simple args to unicode conversion and concatenation."""
return concat(imap(text_type, seq))
def new_context(environment, template_name, blocks, vars=None,
shared=None, globals=None, locals=None):
"""Internal helper to for context creation."""
if vars is None:
vars = {}
if shared:
parent = vars
else:
parent = dict(globals or (), **vars)
if locals:
# if the parent is shared a copy should be created because
# we don't want to modify the dict passed
if shared:
parent = dict(parent)
for key, value in iteritems(locals):
if key[:2] == 'l_' and value is not missing:
parent[key[2:]] = value
return Context(environment, parent, template_name, blocks)
class TemplateReference(object):
"""The `self` in templates."""
def __init__(self, context):
self.__context = context
def __getitem__(self, name):
blocks = self.__context.blocks[name]
return BlockReference(name, self.__context, blocks, 0)
def __repr__(self):
return '<%s %r>' % (
self.__class__.__name__,
self.__context.name
)
class Context(object):
"""The template context holds the variables of a template. It stores the
values passed to the template and also the names the template exports.
Creating instances is neither supported nor useful as it's created
automatically at various stages of the template evaluation and should not
be created by hand.
The context is immutable. Modifications on :attr:`parent` **must not**
happen and modifications on :attr:`vars` are allowed from generated
template code only. Template filters and global functions marked as
:func:`contextfunction`\s get the active context passed as first argument
and are allowed to access the context read-only.
The template context supports read only dict operations (`get`,
`keys`, `values`, `items`, `iterkeys`, `itervalues`, `iteritems`,
`__getitem__`, `__contains__`). Additionally there is a :meth:`resolve`
method that doesn't fail with a `KeyError` but returns an
:class:`Undefined` object for missing variables.
"""
__slots__ = ('parent', 'vars', 'environment', 'eval_ctx', 'exported_vars',
'name', 'blocks', '__weakref__')
def __init__(self, environment, parent, name, blocks):
self.parent = parent
self.vars = {}
self.environment = environment
self.eval_ctx = EvalContext(self.environment, name)
self.exported_vars = set()
self.name = name
# create the initial mapping of blocks. Whenever template inheritance
# takes place the runtime will update this mapping with the new blocks
# from the template.
self.blocks = dict((k, [v]) for k, v in iteritems(blocks))
def super(self, name, current):
"""Render a parent block."""
try:
blocks = self.blocks[name]
index = blocks.index(current) + 1
blocks[index]
except LookupError:
return self.environment.undefined('there is no parent block '
'called %r.' % name,
name='super')
return BlockReference(name, self, blocks, index)
def get(self, key, default=None):
"""Returns an item from the template context, if it doesn't exist
`default` is returned.
"""
try:
return self[key]
except KeyError:
return default
def resolve(self, key):
"""Looks up a variable like `__getitem__` or `get` but returns an
:class:`Undefined` object with the name of the name looked up.
"""
if key in self.vars:
return self.vars[key]
if key in self.parent:
return self.parent[key]
return self.environment.undefined(name=key)
def get_exported(self):
"""Get a new dict with the exported variables."""
return dict((k, self.vars[k]) for k in self.exported_vars)
def get_all(self):
"""Return a copy of the complete context as dict including the
exported variables.
"""
return dict(self.parent, **self.vars)
@internalcode
def call(__self, __obj, *args, **kwargs):
"""Call the callable with the arguments and keyword arguments
provided but inject the active context or environment as first
argument if the callable is a :func:`contextfunction` or
:func:`environmentfunction`.
"""
if __debug__:
__traceback_hide__ = True
# Allow callable classes to take a context
fn = __obj.__call__
for fn_type in ('contextfunction',
'evalcontextfunction',
'environmentfunction'):
if hasattr(fn, fn_type):
__obj = fn
break
if isinstance(__obj, _context_function_types):
if getattr(__obj, 'contextfunction', 0):
args = (__self,) + args
elif getattr(__obj, 'evalcontextfunction', 0):
args = (__self.eval_ctx,) + args
elif getattr(__obj, 'environmentfunction', 0):
args = (__self.environment,) + args
try:
return __obj(*args, **kwargs)
except StopIteration:
return __self.environment.undefined('value was undefined because '
'a callable raised a '
'StopIteration exception')
def derived(self, locals=None):
"""Internal helper function to create a derived context."""
context = new_context(self.environment, self.name, {},
self.parent, True, None, locals)
context.vars.update(self.vars)
context.eval_ctx = self.eval_ctx
context.blocks.update((k, list(v)) for k, v in iteritems(self.blocks))
return context
def _all(meth):
proxy = lambda self: getattr(self.get_all(), meth)()
proxy.__doc__ = getattr(dict, meth).__doc__
proxy.__name__ = meth
return proxy
keys = _all('keys')
values = _all('values')
items = _all('items')
# not available on python 3
if PY2:
iterkeys = _all('iterkeys')
itervalues = _all('itervalues')
iteritems = _all('iteritems')
del _all
def __contains__(self, name):
return name in self.vars or name in self.parent
def __getitem__(self, key):
"""Lookup a variable or raise `KeyError` if the variable is
undefined.
"""
item = self.resolve(key)
if isinstance(item, Undefined):
raise KeyError(key)
return item
def __repr__(self):
return '<%s %s of %r>' % (
self.__class__.__name__,
repr(self.get_all()),
self.name
)
# register the context as mapping if possible
try:
from collections import Mapping
Mapping.register(Context)
except ImportError:
pass
class BlockReference(object):
"""One block on a template reference."""
def __init__(self, name, context, stack, depth):
self.name = name
self._context = context
self._stack = stack
self._depth = depth
@property
def super(self):
"""Super the block."""
if self._depth + 1 >= len(self._stack):
return self._context.environment. \
undefined('there is no parent block called %r.' %
self.name, name='super')
return BlockReference(self.name, self._context, self._stack,
self._depth + 1)
@internalcode
def __call__(self):
rv = concat(self._stack[self._depth](self._context))
if self._context.eval_ctx.autoescape:
rv = Markup(rv)
return rv
class LoopContext(object):
"""A loop context for dynamic iteration."""
def __init__(self, iterable, recurse=None, depth0=0):
self._iterator = iter(iterable)
self._recurse = recurse
self._after = self._safe_next()
self.index0 = -1
self.depth0 = depth0
# try to get the length of the iterable early. This must be done
# here because there are some broken iterators around where there
# __len__ is the number of iterations left (i'm looking at your
# listreverseiterator!).
try:
self._length = len(iterable)
except (TypeError, AttributeError):
self._length = None
def cycle(self, *args):
"""Cycles among the arguments with the current loop index."""
if not args:
raise TypeError('no items for cycling given')
return args[self.index0 % len(args)]
first = property(lambda x: x.index0 == 0)
last = property(lambda x: x._after is _last_iteration)
index = property(lambda x: x.index0 + 1)
revindex = property(lambda x: x.length - x.index0)
revindex0 = property(lambda x: x.length - x.index)
depth = property(lambda x: x.depth0 + 1)
def __len__(self):
return self.length
def __iter__(self):
return LoopContextIterator(self)
def _safe_next(self):
try:
return next(self._iterator)
except StopIteration:
return _last_iteration
@internalcode
def loop(self, iterable):
if self._recurse is None:
raise TypeError('Tried to call non recursive loop. Maybe you '
"forgot the 'recursive' modifier.")
return self._recurse(iterable, self._recurse, self.depth0 + 1)
# a nifty trick to enhance the error message if someone tried to call
# the the loop without or with too many arguments.
__call__ = loop
del loop
@property
def length(self):
if self._length is None:
# if was not possible to get the length of the iterator when
# the loop context was created (ie: iterating over a generator)
# we have to convert the iterable into a sequence and use the
# length of that.
iterable = tuple(self._iterator)
self._iterator = iter(iterable)
self._length = len(iterable) + self.index0 + 1
return self._length
def __repr__(self):
return '<%s %r/%r>' % (
self.__class__.__name__,
self.index,
self.length
)
@implements_iterator
class LoopContextIterator(object):
"""The iterator for a loop context."""
__slots__ = ('context',)
def __init__(self, context):
self.context = context
def __iter__(self):
return self
def __next__(self):
ctx = self.context
ctx.index0 += 1
if ctx._after is _last_iteration:
raise StopIteration()
next_elem = ctx._after
ctx._after = ctx._safe_next()
return next_elem, ctx
class Macro(object):
"""Wraps a macro function."""
def __init__(self, environment, func, name, arguments, defaults,
catch_kwargs, catch_varargs, caller):
self._environment = environment
self._func = func
self._argument_count = len(arguments)
self.name = name
self.arguments = arguments
self.defaults = defaults
self.catch_kwargs = catch_kwargs
self.catch_varargs = catch_varargs
self.caller = caller
@internalcode
def __call__(self, *args, **kwargs):
# try to consume the positional arguments
arguments = list(args[:self._argument_count])
off = len(arguments)
# if the number of arguments consumed is not the number of
# arguments expected we start filling in keyword arguments
# and defaults.
if off != self._argument_count:
for idx, name in enumerate(self.arguments[len(arguments):]):
try:
value = kwargs.pop(name)
except KeyError:
try:
value = self.defaults[idx - self._argument_count + off]
except IndexError:
value = self._environment.undefined(
'parameter %r was not provided' % name, name=name)
arguments.append(value)
# it's important that the order of these arguments does not change
# if not also changed in the compiler's `function_scoping` method.
# the order is caller, keyword arguments, positional arguments!
if self.caller:
caller = kwargs.pop('caller', None)
if caller is None:
caller = self._environment.undefined('No caller defined',
name='caller')
arguments.append(caller)
if self.catch_kwargs:
arguments.append(kwargs)
elif kwargs:
raise TypeError('macro %r takes no keyword argument %r' %
(self.name, next(iter(kwargs))))
if self.catch_varargs:
arguments.append(args[self._argument_count:])
elif len(args) > self._argument_count:
raise TypeError('macro %r takes not more than %d argument(s)' %
(self.name, len(self.arguments)))
return self._func(*arguments)
def __repr__(self):
return '<%s %s>' % (
self.__class__.__name__,
self.name is None and 'anonymous' or repr(self.name)
)
@implements_to_string
class Undefined(object):
"""The default undefined type. This undefined type can be printed and
iterated over, but every other access will raise an :exc:`UndefinedError`:
>>> foo = Undefined(name='foo')
>>> str(foo)
''
>>> not foo
True
>>> foo + 42
Traceback (most recent call last):
...
UndefinedError: 'foo' is undefined
"""
__slots__ = ('_undefined_hint', '_undefined_obj', '_undefined_name',
'_undefined_exception')
def __init__(self, hint=None, obj=missing, name=None, exc=UndefinedError):
self._undefined_hint = hint
self._undefined_obj = obj
self._undefined_name = name
self._undefined_exception = exc
@internalcode
def _fail_with_undefined_error(self, *args, **kwargs):
"""Regular callback function for undefined objects that raises an
`UndefinedError` on call.
"""
if self._undefined_hint is None:
if self._undefined_obj is missing:
hint = '%r is undefined' % self._undefined_name
elif not isinstance(self._undefined_name, string_types):
hint = '%s has no element %r' % (
object_type_repr(self._undefined_obj),
self._undefined_name
)
else:
hint = '%r has no attribute %r' % (
object_type_repr(self._undefined_obj),
self._undefined_name
)
else:
hint = self._undefined_hint
raise self._undefined_exception(hint)
@internalcode
def __getattr__(self, name):
if name[:2] == '__':
raise AttributeError(name)
return self._fail_with_undefined_error()
__add__ = __radd__ = __mul__ = __rmul__ = __div__ = __rdiv__ = \
__truediv__ = __rtruediv__ = __floordiv__ = __rfloordiv__ = \
__mod__ = __rmod__ = __pos__ = __neg__ = __call__ = \
__getitem__ = __lt__ = __le__ = __gt__ = __ge__ = __int__ = \
__float__ = __complex__ = __pow__ = __rpow__ = \
_fail_with_undefined_error
def __eq__(self, other):
return type(self) is type(other)
def __ne__(self, other):
return not self.__eq__(other)
def __hash__(self):
return id(type(self))
def __str__(self):
return u''
def __len__(self):
return 0
def __iter__(self):
if 0:
yield None
def __nonzero__(self):
return False
def __repr__(self):
return 'Undefined'
@implements_to_string
class DebugUndefined(Undefined):
"""An undefined that returns the debug info when printed.
>>> foo = DebugUndefined(name='foo')
>>> str(foo)
'{{ foo }}'
>>> not foo
True
>>> foo + 42
Traceback (most recent call last):
...
UndefinedError: 'foo' is undefined
"""
__slots__ = ()
def __str__(self):
if self._undefined_hint is None:
if self._undefined_obj is missing:
return u'{{ %s }}' % self._undefined_name
return '{{ no such element: %s[%r] }}' % (
object_type_repr(self._undefined_obj),
self._undefined_name
)
return u'{{ undefined value printed: %s }}' % self._undefined_hint
@implements_to_string
class StrictUndefined(Undefined):
"""An undefined that barks on print and iteration as well as boolean
tests and all kinds of comparisons. In other words: you can do nothing
with it except checking if it's defined using the `defined` test.
>>> foo = StrictUndefined(name='foo')
>>> str(foo)
Traceback (most recent call last):
...
UndefinedError: 'foo' is undefined
>>> not foo
Traceback (most recent call last):
...
UndefinedError: 'foo' is undefined
>>> foo + 42
Traceback (most recent call last):
...
UndefinedError: 'foo' is undefined
"""
__slots__ = ()
__iter__ = __str__ = __len__ = __nonzero__ = __eq__ = \
__ne__ = __bool__ = __hash__ = \
Undefined._fail_with_undefined_error
# remove remaining slots attributes, after the metaclass did the magic they
# are unneeded and irritating as they contain wrong data for the subclasses.
del Undefined.__slots__, DebugUndefined.__slots__, StrictUndefined.__slots__

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# -*- coding: utf-8 -*-
"""
jinja2.sandbox
~~~~~~~~~~~~~~
Adds a sandbox layer to Jinja as it was the default behavior in the old
Jinja 1 releases. This sandbox is slightly different from Jinja 1 as the
default behavior is easier to use.
The behavior can be changed by subclassing the environment.
:copyright: (c) 2010 by the Jinja Team.
:license: BSD.
"""
import operator
from jinja2.environment import Environment
from jinja2.exceptions import SecurityError
from jinja2._compat import string_types, function_type, method_type, \
traceback_type, code_type, frame_type, generator_type, PY2
#: maximum number of items a range may produce
MAX_RANGE = 100000
#: attributes of function objects that are considered unsafe.
UNSAFE_FUNCTION_ATTRIBUTES = set(['func_closure', 'func_code', 'func_dict',
'func_defaults', 'func_globals'])
#: unsafe method attributes. function attributes are unsafe for methods too
UNSAFE_METHOD_ATTRIBUTES = set(['im_class', 'im_func', 'im_self'])
#: unsafe generator attirbutes.
UNSAFE_GENERATOR_ATTRIBUTES = set(['gi_frame', 'gi_code'])
# On versions > python 2 the special attributes on functions are gone,
# but they remain on methods and generators for whatever reason.
if not PY2:
UNSAFE_FUNCTION_ATTRIBUTES = set()
import warnings
# make sure we don't warn in python 2.6 about stuff we don't care about
warnings.filterwarnings('ignore', 'the sets module', DeprecationWarning,
module='jinja2.sandbox')
from collections import deque
_mutable_set_types = (set,)
_mutable_mapping_types = (dict,)
_mutable_sequence_types = (list,)
# on python 2.x we can register the user collection types
try:
from UserDict import UserDict, DictMixin
from UserList import UserList
_mutable_mapping_types += (UserDict, DictMixin)
_mutable_set_types += (UserList,)
except ImportError:
pass
# if sets is still available, register the mutable set from there as well
try:
from sets import Set
_mutable_set_types += (Set,)
except ImportError:
pass
#: register Python 2.6 abstract base classes
try:
from collections import MutableSet, MutableMapping, MutableSequence
_mutable_set_types += (MutableSet,)
_mutable_mapping_types += (MutableMapping,)
_mutable_sequence_types += (MutableSequence,)
except ImportError:
pass
_mutable_spec = (
(_mutable_set_types, frozenset([
'add', 'clear', 'difference_update', 'discard', 'pop', 'remove',
'symmetric_difference_update', 'update'
])),
(_mutable_mapping_types, frozenset([
'clear', 'pop', 'popitem', 'setdefault', 'update'
])),
(_mutable_sequence_types, frozenset([
'append', 'reverse', 'insert', 'sort', 'extend', 'remove'
])),
(deque, frozenset([
'append', 'appendleft', 'clear', 'extend', 'extendleft', 'pop',
'popleft', 'remove', 'rotate'
]))
)
def safe_range(*args):
"""A range that can't generate ranges with a length of more than
MAX_RANGE items.
"""
rng = range(*args)
if len(rng) > MAX_RANGE:
raise OverflowError('range too big, maximum size for range is %d' %
MAX_RANGE)
return rng
def unsafe(f):
"""Marks a function or method as unsafe.
::
@unsafe
def delete(self):
pass
"""
f.unsafe_callable = True
return f
def is_internal_attribute(obj, attr):
"""Test if the attribute given is an internal python attribute. For
example this function returns `True` for the `func_code` attribute of
python objects. This is useful if the environment method
:meth:`~SandboxedEnvironment.is_safe_attribute` is overridden.
>>> from jinja2.sandbox import is_internal_attribute
>>> is_internal_attribute(lambda: None, "func_code")
True
>>> is_internal_attribute((lambda x:x).func_code, 'co_code')
True
>>> is_internal_attribute(str, "upper")
False
"""
if isinstance(obj, function_type):
if attr in UNSAFE_FUNCTION_ATTRIBUTES:
return True
elif isinstance(obj, method_type):
if attr in UNSAFE_FUNCTION_ATTRIBUTES or \
attr in UNSAFE_METHOD_ATTRIBUTES:
return True
elif isinstance(obj, type):
if attr == 'mro':
return True
elif isinstance(obj, (code_type, traceback_type, frame_type)):
return True
elif isinstance(obj, generator_type):
if attr in UNSAFE_GENERATOR_ATTRIBUTES:
return True
return attr.startswith('__')
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
class SandboxedEnvironment(Environment):
"""The sandboxed environment. It works like the regular environment but
tells the compiler to generate sandboxed code. Additionally subclasses of
this environment may override the methods that tell the runtime what
attributes or functions are safe to access.
If the template tries to access insecure code a :exc:`SecurityError` is
raised. However also other exceptions may occour during the rendering so
the caller has to ensure that all exceptions are catched.
"""
sandboxed = True
#: default callback table for the binary operators. A copy of this is
#: available on each instance of a sandboxed environment as
#: :attr:`binop_table`
default_binop_table = {
'+': operator.add,
'-': operator.sub,
'*': operator.mul,
'/': operator.truediv,
'//': operator.floordiv,
'**': operator.pow,
'%': operator.mod
}
#: default callback table for the unary operators. A copy of this is
#: available on each instance of a sandboxed environment as
#: :attr:`unop_table`
default_unop_table = {
'+': operator.pos,
'-': operator.neg
}
#: a set of binary operators that should be intercepted. Each operator
#: that is added to this set (empty by default) is delegated to the
#: :meth:`call_binop` method that will perform the operator. The default
#: operator callback is specified by :attr:`binop_table`.
#:
#: The following binary operators are interceptable:
#: ``//``, ``%``, ``+``, ``*``, ``-``, ``/``, and ``**``
#:
#: The default operation form the operator table corresponds to the
#: builtin function. Intercepted calls are always slower than the native
#: operator call, so make sure only to intercept the ones you are
#: interested in.
#:
#: .. versionadded:: 2.6
intercepted_binops = frozenset()
#: a set of unary operators that should be intercepted. Each operator
#: that is added to this set (empty by default) is delegated to the
#: :meth:`call_unop` method that will perform the operator. The default
#: operator callback is specified by :attr:`unop_table`.
#:
#: The following unary operators are interceptable: ``+``, ``-``
#:
#: The default operation form the operator table corresponds to the
#: builtin function. Intercepted calls are always slower than the native
#: operator call, so make sure only to intercept the ones you are
#: interested in.
#:
#: .. versionadded:: 2.6
intercepted_unops = frozenset()
def intercept_unop(self, operator):
"""Called during template compilation with the name of a unary
operator to check if it should be intercepted at runtime. If this
method returns `True`, :meth:`call_unop` is excuted for this unary
operator. The default implementation of :meth:`call_unop` will use
the :attr:`unop_table` dictionary to perform the operator with the
same logic as the builtin one.
The following unary operators are interceptable: ``+`` and ``-``
Intercepted calls are always slower than the native operator call,
so make sure only to intercept the ones you are interested in.
.. versionadded:: 2.6
"""
return False
def __init__(self, *args, **kwargs):
Environment.__init__(self, *args, **kwargs)
self.globals['range'] = safe_range
self.binop_table = self.default_binop_table.copy()
self.unop_table = self.default_unop_table.copy()
def is_safe_attribute(self, obj, attr, value):
"""The sandboxed environment will call this method to check if the
attribute of an object is safe to access. Per default all attributes
starting with an underscore are considered private as well as the
special attributes of internal python objects as returned by the
:func:`is_internal_attribute` function.
"""
return not (attr.startswith('_') or is_internal_attribute(obj, attr))
def is_safe_callable(self, obj):
"""Check if an object is safely callable. Per default a function is
considered safe unless the `unsafe_callable` attribute exists and is
True. Override this method to alter the behavior, but this won't
affect the `unsafe` decorator from this module.
"""
return not (getattr(obj, 'unsafe_callable', False) or
getattr(obj, 'alters_data', False))
def call_binop(self, context, operator, left, right):
"""For intercepted binary operator calls (:meth:`intercepted_binops`)
this function is executed instead of the builtin operator. This can
be used to fine tune the behavior of certain operators.
.. versionadded:: 2.6
"""
return self.binop_table[operator](left, right)
def call_unop(self, context, operator, arg):
"""For intercepted unary operator calls (:meth:`intercepted_unops`)
this function is executed instead of the builtin operator. This can
be used to fine tune the behavior of certain operators.
.. versionadded:: 2.6
"""
return self.unop_table[operator](arg)
def getitem(self, obj, argument):
"""Subscribe an object from sandboxed code."""
try:
return obj[argument]
except (TypeError, LookupError):
if isinstance(argument, string_types):
try:
attr = str(argument)
except Exception:
pass
else:
try:
value = getattr(obj, attr)
except AttributeError:
pass
else:
if self.is_safe_attribute(obj, argument, value):
return value
return self.unsafe_undefined(obj, argument)
return self.undefined(obj=obj, name=argument)
def getattr(self, obj, attribute):
"""Subscribe an object from sandboxed code and prefer the
attribute. The attribute passed *must* be a bytestring.
"""
try:
value = getattr(obj, attribute)
except AttributeError:
try:
return obj[attribute]
except (TypeError, LookupError):
pass
else:
if self.is_safe_attribute(obj, attribute, value):
return value
return self.unsafe_undefined(obj, attribute)
return self.undefined(obj=obj, name=attribute)
def unsafe_undefined(self, obj, attribute):
"""Return an undefined object for unsafe attributes."""
return self.undefined('access to attribute %r of %r '
'object is unsafe.' % (
attribute,
obj.__class__.__name__
), name=attribute, obj=obj, exc=SecurityError)
def call(__self, __context, __obj, *args, **kwargs):
"""Call an object from sandboxed code."""
# the double prefixes are to avoid double keyword argument
# errors when proxying the call.
if not __self.is_safe_callable(__obj):
raise SecurityError('%r is not safely callable' % (__obj,))
return __context.call(__obj, *args, **kwargs)
class ImmutableSandboxedEnvironment(SandboxedEnvironment):
"""Works exactly like the regular `SandboxedEnvironment` but does not
permit modifications on the builtin mutable objects `list`, `set`, and
`dict` by using the :func:`modifies_known_mutable` function.
"""
def is_safe_attribute(self, obj, attr, value):
if not SandboxedEnvironment.is_safe_attribute(self, obj, attr, value):
return False
return not modifies_known_mutable(obj, attr)

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# -*- coding: utf-8 -*-
"""
jinja2.tests
~~~~~~~~~~~~
Jinja test functions. Used with the "is" operator.
:copyright: (c) 2010 by the Jinja Team.
:license: BSD, see LICENSE for more details.
"""
import re
from jinja2.runtime import Undefined
from jinja2._compat import text_type, string_types, mapping_types
number_re = re.compile(r'^-?\d+(\.\d+)?$')
regex_type = type(number_re)
test_callable = callable
def test_odd(value):
"""Return true if the variable is odd."""
return value % 2 == 1
def test_even(value):
"""Return true if the variable is even."""
return value % 2 == 0
def test_divisibleby(value, num):
"""Check if a variable is divisible by a number."""
return value % num == 0
def test_defined(value):
"""Return true if the variable is defined:
.. sourcecode:: jinja
{% if variable is defined %}
value of variable: {{ variable }}
{% else %}
variable is not defined
{% endif %}
See the :func:`default` filter for a simple way to set undefined
variables.
"""
return not isinstance(value, Undefined)
def test_undefined(value):
"""Like :func:`defined` but the other way round."""
return isinstance(value, Undefined)
def test_none(value):
"""Return true if the variable is none."""
return value is None
def test_lower(value):
"""Return true if the variable is lowercased."""
return text_type(value).islower()
def test_upper(value):
"""Return true if the variable is uppercased."""
return text_type(value).isupper()
def test_string(value):
"""Return true if the object is a string."""
return isinstance(value, string_types)
def test_mapping(value):
"""Return true if the object is a mapping (dict etc.).
.. versionadded:: 2.6
"""
return isinstance(value, mapping_types)
def test_number(value):
"""Return true if the variable is a number."""
return isinstance(value, (int, float, complex))
def test_sequence(value):
"""Return true if the variable is a sequence. Sequences are variables
that are iterable.
"""
try:
len(value)
value.__getitem__
except:
return False
return True
def test_sameas(value, other):
"""Check if an object points to the same memory address than another
object:
.. sourcecode:: jinja
{% if foo.attribute is sameas false %}
the foo attribute really is the `False` singleton
{% endif %}
"""
return value is other
def test_iterable(value):
"""Check if it's possible to iterate over an object."""
try:
iter(value)
except TypeError:
return False
return True
def test_escaped(value):
"""Check if the value is escaped."""
return hasattr(value, '__html__')
TESTS = {
'odd': test_odd,
'even': test_even,
'divisibleby': test_divisibleby,
'defined': test_defined,
'undefined': test_undefined,
'none': test_none,
'lower': test_lower,
'upper': test_upper,
'string': test_string,
'mapping': test_mapping,
'number': test_number,
'sequence': test_sequence,
'iterable': test_iterable,
'callable': test_callable,
'sameas': test_sameas,
'escaped': test_escaped
}

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# -*- coding: utf-8 -*-
"""
jinja2.utils
~~~~~~~~~~~~
Utility functions.
:copyright: (c) 2010 by the Jinja Team.
:license: BSD, see LICENSE for more details.
"""
import re
import errno
from collections import deque
from jinja2._compat import text_type, string_types, implements_iterator, \
allocate_lock, url_quote
_word_split_re = re.compile(r'(\s+)')
_punctuation_re = re.compile(
'^(?P<lead>(?:%s)*)(?P<middle>.*?)(?P<trail>(?:%s)*)$' % (
'|'.join(map(re.escape, ('(', '<', '&lt;'))),
'|'.join(map(re.escape, ('.', ',', ')', '>', '\n', '&gt;')))
)
)
_simple_email_re = re.compile(r'^\S+@[a-zA-Z0-9._-]+\.[a-zA-Z0-9._-]+$')
_striptags_re = re.compile(r'(<!--.*?-->|<[^>]*>)')
_entity_re = re.compile(r'&([^;]+);')
_letters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
_digits = '0123456789'
# special singleton representing missing values for the runtime
missing = type('MissingType', (), {'__repr__': lambda x: 'missing'})()
# internal code
internal_code = set()
concat = u''.join
def contextfunction(f):
"""This decorator can be used to mark a function or method context callable.
A context callable is passed the active :class:`Context` as first argument when
called from the template. This is useful if a function wants to get access
to the context or functions provided on the context object. For example
a function that returns a sorted list of template variables the current
template exports could look like this::
@contextfunction
def get_exported_names(context):
return sorted(context.exported_vars)
"""
f.contextfunction = True
return f
def evalcontextfunction(f):
"""This decorator can be used to mark a function or method as an eval
context callable. This is similar to the :func:`contextfunction`
but instead of passing the context, an evaluation context object is
passed. For more information about the eval context, see
:ref:`eval-context`.
.. versionadded:: 2.4
"""
f.evalcontextfunction = True
return f
def environmentfunction(f):
"""This decorator can be used to mark a function or method as environment
callable. This decorator works exactly like the :func:`contextfunction`
decorator just that the first argument is the active :class:`Environment`
and not context.
"""
f.environmentfunction = True
return f
def internalcode(f):
"""Marks the function as internally used"""
internal_code.add(f.__code__)
return f
def is_undefined(obj):
"""Check if the object passed is undefined. This does nothing more than
performing an instance check against :class:`Undefined` but looks nicer.
This can be used for custom filters or tests that want to react to
undefined variables. For example a custom default filter can look like
this::
def default(var, default=''):
if is_undefined(var):
return default
return var
"""
from jinja2.runtime import Undefined
return isinstance(obj, Undefined)
def consume(iterable):
"""Consumes an iterable without doing anything with it."""
for event in iterable:
pass
def clear_caches():
"""Jinja2 keeps internal caches for environments and lexers. These are
used so that Jinja2 doesn't have to recreate environments and lexers all
the time. Normally you don't have to care about that but if you are
messuring memory consumption you may want to clean the caches.
"""
from jinja2.environment import _spontaneous_environments
from jinja2.lexer import _lexer_cache
_spontaneous_environments.clear()
_lexer_cache.clear()
def import_string(import_name, silent=False):
"""Imports an object based on a string. This is useful if you want to
use import paths as endpoints or something similar. An import path can
be specified either in dotted notation (``xml.sax.saxutils.escape``)
or with a colon as object delimiter (``xml.sax.saxutils:escape``).
If the `silent` is True the return value will be `None` if the import
fails.
:return: imported object
"""
try:
if ':' in import_name:
module, obj = import_name.split(':', 1)
elif '.' in import_name:
items = import_name.split('.')
module = '.'.join(items[:-1])
obj = items[-1]
else:
return __import__(import_name)
return getattr(__import__(module, None, None, [obj]), obj)
except (ImportError, AttributeError):
if not silent:
raise
def open_if_exists(filename, mode='rb'):
"""Returns a file descriptor for the filename if that file exists,
otherwise `None`.
"""
try:
return open(filename, mode)
except IOError as e:
if e.errno not in (errno.ENOENT, errno.EISDIR):
raise
def object_type_repr(obj):
"""Returns the name of the object's type. For some recognized
singletons the name of the object is returned instead. (For
example for `None` and `Ellipsis`).
"""
if obj is None:
return 'None'
elif obj is Ellipsis:
return 'Ellipsis'
# __builtin__ in 2.x, builtins in 3.x
if obj.__class__.__module__ in ('__builtin__', 'builtins'):
name = obj.__class__.__name__
else:
name = obj.__class__.__module__ + '.' + obj.__class__.__name__
return '%s object' % name
def pformat(obj, verbose=False):
"""Prettyprint an object. Either use the `pretty` library or the
builtin `pprint`.
"""
try:
from pretty import pretty
return pretty(obj, verbose=verbose)
except ImportError:
from pprint import pformat
return pformat(obj)
def urlize(text, trim_url_limit=None, nofollow=False):
"""Converts any URLs in text into clickable links. Works on http://,
https:// and www. links. Links can have trailing punctuation (periods,
commas, close-parens) and leading punctuation (opening parens) and
it'll still do the right thing.
If trim_url_limit is not None, the URLs in link text will be limited
to trim_url_limit characters.
If nofollow is True, the URLs in link text will get a rel="nofollow"
attribute.
"""
trim_url = lambda x, limit=trim_url_limit: limit is not None \
and (x[:limit] + (len(x) >=limit and '...'
or '')) or x
words = _word_split_re.split(text_type(escape(text)))
nofollow_attr = nofollow and ' rel="nofollow"' or ''
for i, word in enumerate(words):
match = _punctuation_re.match(word)
if match:
lead, middle, trail = match.groups()
if middle.startswith('www.') or (
'@' not in middle and
not middle.startswith('http://') and
not middle.startswith('https://') and
len(middle) > 0 and
middle[0] in _letters + _digits and (
middle.endswith('.org') or
middle.endswith('.net') or
middle.endswith('.com')
)):
middle = '<a href="http://%s"%s>%s</a>' % (middle,
nofollow_attr, trim_url(middle))
if middle.startswith('http://') or \
middle.startswith('https://'):
middle = '<a href="%s"%s>%s</a>' % (middle,
nofollow_attr, trim_url(middle))
if '@' in middle and not middle.startswith('www.') and \
not ':' in middle and _simple_email_re.match(middle):
middle = '<a href="mailto:%s">%s</a>' % (middle, middle)
if lead + middle + trail != word:
words[i] = lead + middle + trail
return u''.join(words)
def generate_lorem_ipsum(n=5, html=True, min=20, max=100):
"""Generate some lorem impsum for the template."""
from jinja2.constants import LOREM_IPSUM_WORDS
from random import choice, randrange
words = LOREM_IPSUM_WORDS.split()
result = []
for _ in range(n):
next_capitalized = True
last_comma = last_fullstop = 0
word = None
last = None
p = []
# each paragraph contains out of 20 to 100 words.
for idx, _ in enumerate(range(randrange(min, max))):
while True:
word = choice(words)
if word != last:
last = word
break
if next_capitalized:
word = word.capitalize()
next_capitalized = False
# add commas
if idx - randrange(3, 8) > last_comma:
last_comma = idx
last_fullstop += 2
word += ','
# add end of sentences
if idx - randrange(10, 20) > last_fullstop:
last_comma = last_fullstop = idx
word += '.'
next_capitalized = True
p.append(word)
# ensure that the paragraph ends with a dot.
p = u' '.join(p)
if p.endswith(','):
p = p[:-1] + '.'
elif not p.endswith('.'):
p += '.'
result.append(p)
if not html:
return u'\n\n'.join(result)
return Markup(u'\n'.join(u'<p>%s</p>' % escape(x) for x in result))
def unicode_urlencode(obj, charset='utf-8'):
"""URL escapes a single bytestring or unicode string with the
given charset if applicable to URL safe quoting under all rules
that need to be considered under all supported Python versions.
If non strings are provided they are converted to their unicode
representation first.
"""
if not isinstance(obj, string_types):
obj = text_type(obj)
if isinstance(obj, text_type):
obj = obj.encode(charset)
return text_type(url_quote(obj))
class LRUCache(object):
"""A simple LRU Cache implementation."""
# this is fast for small capacities (something below 1000) but doesn't
# scale. But as long as it's only used as storage for templates this
# won't do any harm.
def __init__(self, capacity):
self.capacity = capacity
self._mapping = {}
self._queue = deque()
self._postinit()
def _postinit(self):
# alias all queue methods for faster lookup
self._popleft = self._queue.popleft
self._pop = self._queue.pop
self._remove = self._queue.remove
self._wlock = allocate_lock()
self._append = self._queue.append
def __getstate__(self):
return {
'capacity': self.capacity,
'_mapping': self._mapping,
'_queue': self._queue
}
def __setstate__(self, d):
self.__dict__.update(d)
self._postinit()
def __getnewargs__(self):
return (self.capacity,)
def copy(self):
"""Return a shallow copy of the instance."""
rv = self.__class__(self.capacity)
rv._mapping.update(self._mapping)
rv._queue = deque(self._queue)
return rv
def get(self, key, default=None):
"""Return an item from the cache dict or `default`"""
try:
return self[key]
except KeyError:
return default
def setdefault(self, key, default=None):
"""Set `default` if the key is not in the cache otherwise
leave unchanged. Return the value of this key.
"""
self._wlock.acquire()
try:
try:
return self[key]
except KeyError:
self[key] = default
return default
finally:
self._wlock.release()
def clear(self):
"""Clear the cache."""
self._wlock.acquire()
try:
self._mapping.clear()
self._queue.clear()
finally:
self._wlock.release()
def __contains__(self, key):
"""Check if a key exists in this cache."""
return key in self._mapping
def __len__(self):
"""Return the current size of the cache."""
return len(self._mapping)
def __repr__(self):
return '<%s %r>' % (
self.__class__.__name__,
self._mapping
)
def __getitem__(self, key):
"""Get an item from the cache. Moves the item up so that it has the
highest priority then.
Raise a `KeyError` if it does not exist.
"""
self._wlock.acquire()
try:
rv = self._mapping[key]
if self._queue[-1] != key:
try:
self._remove(key)
except ValueError:
# if something removed the key from the container
# when we read, ignore the ValueError that we would
# get otherwise.
pass
self._append(key)
return rv
finally:
self._wlock.release()
def __setitem__(self, key, value):
"""Sets the value for an item. Moves the item up so that it
has the highest priority then.
"""
self._wlock.acquire()
try:
if key in self._mapping:
self._remove(key)
elif len(self._mapping) == self.capacity:
del self._mapping[self._popleft()]
self._append(key)
self._mapping[key] = value
finally:
self._wlock.release()
def __delitem__(self, key):
"""Remove an item from the cache dict.
Raise a `KeyError` if it does not exist.
"""
self._wlock.acquire()
try:
del self._mapping[key]
try:
self._remove(key)
except ValueError:
# __getitem__ is not locked, it might happen
pass
finally:
self._wlock.release()
def items(self):
"""Return a list of items."""
result = [(key, self._mapping[key]) for key in list(self._queue)]
result.reverse()
return result
def iteritems(self):
"""Iterate over all items."""
return iter(self.items())
def values(self):
"""Return a list of all values."""
return [x[1] for x in self.items()]
def itervalue(self):
"""Iterate over all values."""
return iter(self.values())
def keys(self):
"""Return a list of all keys ordered by most recent usage."""
return list(self)
def iterkeys(self):
"""Iterate over all keys in the cache dict, ordered by
the most recent usage.
"""
return reversed(tuple(self._queue))
__iter__ = iterkeys
def __reversed__(self):
"""Iterate over the values in the cache dict, oldest items
coming first.
"""
return iter(tuple(self._queue))
__copy__ = copy
# register the LRU cache as mutable mapping if possible
try:
from collections import MutableMapping
MutableMapping.register(LRUCache)
except ImportError:
pass
@implements_iterator
class Cycler(object):
"""A cycle helper for templates."""
def __init__(self, *items):
if not items:
raise RuntimeError('at least one item has to be provided')
self.items = items
self.reset()
def reset(self):
"""Resets the cycle."""
self.pos = 0
@property
def current(self):
"""Returns the current item."""
return self.items[self.pos]
def __next__(self):
"""Goes one item ahead and returns it."""
rv = self.current
self.pos = (self.pos + 1) % len(self.items)
return rv
class Joiner(object):
"""A joining helper for templates."""
def __init__(self, sep=u', '):
self.sep = sep
self.used = False
def __call__(self):
if not self.used:
self.used = True
return u''
return self.sep
# Imported here because that's where it was in the past
from .markupsafe import Markup, escape, soft_unicode

87
3rdparty/jinja2/visitor.py vendored
Unescape View File

@ -1,87 +0,0 @@
# -*- coding: utf-8 -*-
"""
jinja2.visitor
~~~~~~~~~~~~~~
This module implements a visitor for the nodes.
:copyright: (c) 2010 by the Jinja Team.
:license: BSD.
"""
from jinja2.nodes import Node
class NodeVisitor(object):
"""Walks the abstract syntax tree and call visitor functions for every
node found. The visitor functions may return values which will be
forwarded by the `visit` method.
Per default the visitor functions for the nodes are ``'visit_'`` +
class name of the node. So a `TryFinally` node visit function would
be `visit_TryFinally`. This behavior can be changed by overriding
the `get_visitor` function. If no visitor function exists for a node
(return value `None`) the `generic_visit` visitor is used instead.
"""
def get_visitor(self, node):
"""Return the visitor function for this node or `None` if no visitor
exists for this node. In that case the generic visit function is
used instead.
"""
method = 'visit_' + node.__class__.__name__
return getattr(self, method, None)
def visit(self, node, *args, **kwargs):
"""Visit a node."""
f = self.get_visitor(node)
if f is not None:
return f(node, *args, **kwargs)
return self.generic_visit(node, *args, **kwargs)
def generic_visit(self, node, *args, **kwargs):
"""Called if no explicit visitor function exists for a node."""
for node in node.iter_child_nodes():
self.visit(node, *args, **kwargs)
class NodeTransformer(NodeVisitor):
"""Walks the abstract syntax tree and allows modifications of nodes.
The `NodeTransformer` will walk the AST and use the return value of the
visitor functions to replace or remove the old node. If the return
value of the visitor function is `None` the node will be removed
from the previous location otherwise it's replaced with the return
value. The return value may be the original node in which case no
replacement takes place.
"""
def generic_visit(self, node, *args, **kwargs):
for field, old_value in node.iter_fields():
if isinstance(old_value, list):
new_values = []
for value in old_value:
if isinstance(value, Node):
value = self.visit(value, *args, **kwargs)
if value is None:
continue
elif not isinstance(value, Node):
new_values.extend(value)
continue
new_values.append(value)
old_value[:] = new_values
elif isinstance(old_value, Node):
new_node = self.visit(old_value, *args, **kwargs)
if new_node is None:
delattr(node, field)
else:
setattr(node, field, new_node)
return node
def visit_list(self, node, *args, **kwargs):
"""As transformers may return lists in some places this method
can be used to enforce a list as return value.
"""
rv = self.visit(node, *args, **kwargs)
if not isinstance(rv, list):
rv = [rv]
return rv
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