def get_jinja_locals(real_locals):
ctx = real_locals.get('context')
if ctx:
locals = ctx.get_all().copy()
else:
locals = {}
local_overrides = {}
for name, value in iteritems(real_locals):
if not name.startswith('l_') or value is missing:
continue
try:
_, depth, name = name.split('_', 2)
depth = int(depth)
except ValueError:
continue
cur_depth = local_overrides.get(name, (-1, ))[0]
if cur_depth < depth:
local_overrides[name] = (depth, value)
for name, (_, value) in iteritems(local_overrides):
if value is missing:
locals.pop(name, None)
else:
locals[name] = value
return locals
def branch_update(self, branch_symbols):
stores = {}
for branch in branch_symbols:
for target in branch.stores:
if target in self.stores:
continue
stores[target] = stores.get(target, 0) + 1
for sym in branch_symbols:
self.refs.update(sym.refs)
self.loads.update(sym.loads)
self.stores.update(sym.stores)
for name, branch_count in iteritems(stores):
if branch_count == len(branch_symbols):
continue
target = self.find_ref(name)
assert target is not None, 'should not happen'
if self.parent is not None:
outer_target = self.parent.find_ref(name)
if outer_target is not None:
self.loads[target] = (VAR_LOAD_ALIAS, outer_target)
continue
self.loads[target] = (VAR_LOAD_RESOLVE, name)
def extend(self, **attributes):
"""Add the items to the instance of the environment if they do not exist
yet. This is used by :ref:`extensions <writing-extensions>` to register
callbacks and configuration values without breaking inheritance.
"""
for key, value in iteritems(attributes):
if not hasattr(self, key):
setattr(self, key, value)
def dump_param_targets(self):
rv = set()
node = self
while node is not None:
for target, (instr, _) in iteritems(self.loads):
if instr == VAR_LOAD_PARAMETER:
rv.add(target)
node = node.parent
return rv
def overlay(self, block_start_string=missing, block_end_string=missing,
variable_start_string=missing, variable_end_string=missing,
comment_start_string=missing, comment_end_string=missing,
line_statement_prefix=missing, line_comment_prefix=missing,
trim_blocks=missing, lstrip_blocks=missing,
extensions=missing, optimized=missing,
undefined=missing, finalize=missing, autoescape=missing,
loader=missing, cache_size=missing, auto_reload=missing,
bytecode_cache=missing):
"""Create a new overlay environment that shares all the data with the
current environment except for cache and the overridden attributes.
Extensions cannot be removed for an overlayed environment. An overlayed
environment automatically gets all the extensions of the environment it
is linked to plus optional extra extensions.
Creating overlays should happen after the initial environment was set
up completely. Not all attributes are truly linked, some are just
copied over so modifications on the original environment may not shine
through.
"""
args = dict(locals())
del args['self'], args['cache_size'], args['extensions']
rv = object.__new__(self.__class__)
rv.__dict__.update(self.__dict__)
rv.overlayed = True
rv.linked_to = self
for key, value in iteritems(args):
if value is not missing:
setattr(rv, key, value)
if cache_size is not missing:
rv.cache = create_cache(cache_size)
else:
rv.cache = copy_cache(self.cache)
rv.extensions = {}
for key, value in iteritems(self.extensions):
rv.extensions[key] = value.bind(rv)
if extensions is not missing:
rv.extensions.update(load_extensions(rv, extensions))
return _environment_sanity_check(rv)
def derived(self, locals=None):
"""Internal helper function to create a derived context. This is
used in situations where the system needs a new context in the same
template that is independent.
"""
context = new_context(self.environment, self.name, {}, self.get_all(),
True, None, locals)
context.eval_ctx = self.eval_ctx
context.blocks.update((k, list(v)) for k, v in iteritems(self.blocks))
return context
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])
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))
# In case we detect the fast resolve mode we can set up an alias
# here that bypasses the legacy code logic.
if self._fast_resolve_mode:
self.resolve_or_missing = MethodType(resolve_or_missing, self)
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 value is not missing:
parent[key] = value
return environment.context_class(environment, parent, template_name,
blocks)
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
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)
'}': 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_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:
def enter_frame(self, frame):
"""Remember all undeclared identifiers."""
CodeGenerator.enter_frame(self, frame)
for _, (action, param) in iteritems(frame.symbols.loads):
if action == 'resolve':
self.undeclared_identifiers.add(param)
