mirror of
https://github.com/janeczku/calibre-web
synced 2024-10-31 15:20:28 +00:00
bbf6d9b026
Bugfix for feeds
- removed categories related and up
- load new books now working
- category random now working
login page is free of non accessible elements
boolean custom column is vivible in UI
books with only with certain languages can be shown
book shelfs can be deleted from UI
Anonymous user view is more resticted
Added browse of series in sidebar
Dependencys in vendor folder are updated to newer versions (licencs files are now present)
Bugfix editing Authors names
Made upload on windows working
900 lines
35 KiB
Python
900 lines
35 KiB
Python
# -*- 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 imap
|
|
|
|
|
|
_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()
|
|
if self.stream.skip_if('assign'):
|
|
expr = self.parse_tuple()
|
|
return nodes.Assign(target, expr, lineno=lineno)
|
|
body = self.parse_statements(('name:endset',),
|
|
drop_needle=True)
|
|
return nodes.AssignBlock(target, body, 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())
|
|
elif defaults:
|
|
self.fail('non-default argument follows default argument')
|
|
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
|