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#############################################################################
##
## Copyright (C) 2017 The Qt Company Ltd.
## Contact: https://www.qt.io/licensing/
##
## This file is part of PySide2.
##
## $QT_BEGIN_LICENSE:LGPL$
## Commercial License Usage
## Licensees holding valid commercial Qt licenses may use this file in
## accordance with the commercial license agreement provided with the
## Software or, alternatively, in accordance with the terms contained in
## a written agreement between you and The Qt Company. For licensing terms
## and conditions see https://www.qt.io/terms-conditions. For further
## information use the contact form at https://www.qt.io/contact-us.
##
## GNU Lesser General Public License Usage
## Alternatively, this file may be used under the terms of the GNU Lesser
## General Public License version 3 as published by the Free Software
## Foundation and appearing in the file LICENSE.LGPL3 included in the
## packaging of this file. Please review the following information to
## ensure the GNU Lesser General Public License version 3 requirements
## will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
##
## GNU General Public License Usage
## Alternatively, this file may be used under the terms of the GNU
## General Public License version 2.0 or (at your option) the GNU General
## Public license version 3 or any later version approved by the KDE Free
## Qt Foundation. The licenses are as published by the Free Software
## Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
## included in the packaging of this file. Please review the following
## information to ensure the GNU General Public License requirements will
## be met: https://www.gnu.org/licenses/gpl-2.0.html and
## https://www.gnu.org/licenses/gpl-3.0.html.
##
## $QT_END_LICENSE$
##
#############################################################################
from __future__ import print_function, absolute_import
import sys
import re
import warnings
import types
import keyword
import functools
from .mapping import type_map, update_mapping, __dict__ as namespace
_DEBUG = False
TYPE_MAP_DOC = """
The type_map variable is central for the signature package.
PySide has a new function 'CppGenerator::writeSignatureInfo()'
that extracts the gathered information about the function arguments
and defaults as good as it can. But what PySide generates is still
very C-ish and has many constants that Python doesn't understand.
The function 'try_to_guess()' below understands a lot of PySide's
peculiar way to assume local context. If it is able to do the guess,
then the result is inserted into the dict, so the search happens
not again. For everything that is not covered by these automatic
guesses, we provide an entry in 'type_map' that resolves it.
In effect, 'type_map' maps text to real Python objects.
"""
def dprint(*args, **kw):
if _DEBUG:
import pprint
for arg in args:
pprint.pprint(arg)
def _parse_line(line):
line_re = r"""
((?P<multi> ([0-9]+)) : )? # the optional multi-index
(?P<funcname> \w+(\.\w+)*) # the function name
\( (?P<arglist> .*?) \) # the argument list
( -> (?P<returntype> .*) )? # the optional return type
$
"""
ret = re.match(line_re, line, re.VERBOSE).groupdict()
arglist = ret["arglist"]
arglist = list(x.strip() for x in re.split(r"""
(
(?: # inner group is not capturing
[^,()] # no commas or braces
|
\(
(?:
[^()]* # or one brace pair
|
\(
[^()]* # or doubls nested pair
\)
)*
\)
)+ # longest possible span
) # this list is interspersed with "," and surrounded by ""
""", arglist, flags=re.VERBOSE)
if x.strip() not in ("", ","))
args = []
for arg in arglist:
name, ann = arg.split(":")
if name in keyword.kwlist:
name = name + "_"
if "=" in ann:
ann, default = ann.split("=")
tup = name, ann, default
else:
tup = name, ann
args.append(tup)
ret["arglist"] = args
multi = ret["multi"]
if multi is not None:
ret["multi"] = int(multi)
return ret
def _resolve_number(thing):
try:
return eval(thing, namespace)
except Exception:
return None
def try_to_guess(thing, valtype):
res = _resolve_number(thing)
if res is not None:
return res
if "." not in thing and "(" not in thing:
text = "{}.{}".format(valtype, thing)
try:
return eval(text, namespace)
except Exception:
pass
typewords = valtype.split(".")
valwords = thing.split(".")
braceless = valwords[0]
if "(" in braceless:
braceless = braceless[:braceless.index("(")]
for idx, w in enumerate(typewords):
if w == braceless:
text = ".".join(typewords[:idx] + valwords)
try:
return eval(text, namespace)
except Exception:
pass
return None
def _resolve_value(thing, valtype, line):
if thing in type_map:
return type_map[thing]
try:
res = eval(thing, namespace)
type_map[thing] = res
return res
except Exception:
pass
res = try_to_guess(thing, valtype) if valtype else None
if res is not None:
type_map[thing] = res
return res
warnings.warn("""pyside_type_init:
UNRECOGNIZED: {!r}
OFFENDING LINE: {!r}
""".format(thing, line), RuntimeWarning)
return thing
def _resolve_type(thing, line):
return _resolve_value(thing, None, line)
def calculate_props(line):
line = line.strip()
res = _parse_line(line)
arglist = res["arglist"]
annotations = {}
_defaults = []
for tup in arglist:
name, ann = tup[:2]
annotations[name] = _resolve_type(ann, line)
if len(tup) == 3:
default = _resolve_value(tup[2], ann, line)
_defaults.append(default)
defaults = tuple(_defaults)
returntype = res["returntype"]
if returntype is not None:
annotations["return"] = _resolve_type(returntype, line)
props = {}
props["defaults"] = defaults
props["kwdefaults"] = {}
props["annotations"] = annotations
props["varnames"] = varnames = tuple(tup[0] for tup in arglist)
funcname = res["funcname"]
props["fullname"] = funcname
shortname = funcname[funcname.rindex(".")+1:]
props["name"] = shortname
props["multi"] = res["multi"]
return props
def pyside_type_init(typemod, sig_str):
dprint()
if type(typemod) is types.ModuleType:
dprint("Initialization of module '{}'".format(typemod.__name__))
else:
dprint("Initialization of type '{}.{}'".format(typemod.__module__,
typemod.__name__))
update_mapping()
ret = {}
multi_props = []
for line in sig_str.strip().splitlines():
props = calculate_props(line)
shortname = props["name"]
multi = props["multi"]
if multi is None:
ret[shortname] = props
dprint(props)
else:
fullname = props.pop("fullname")
multi_props.append(props)
if multi > 0:
continue
multi_props = {"multi": multi_props, "fullname": fullname}
ret[shortname] = multi_props
dprint(multi_props)
multi_props = []
return ret
# end of file
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