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Diffstat (limited to 'sources/pyside2/PySide2/support/signature/loader.py')
| -rw-r--r-- | sources/pyside2/PySide2/support/signature/loader.py | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/sources/pyside2/PySide2/support/signature/loader.py b/sources/pyside2/PySide2/support/signature/loader.py new file mode 100644 index 000000000..f9c8b5c53 --- /dev/null +++ b/sources/pyside2/PySide2/support/signature/loader.py @@ -0,0 +1,115 @@ +############################################################################# +## +## 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 + +""" +This file was originally directly embedded into the C source. +After it grew more and more, I now prefer to have it as Python file. +The remaining stub loader is a short string now. + +The loader has to lazy-load the signature module and also provides a few +Python modules that I consider essential and therefore built-in. +This version does not use an embedded .zip file. +""" + +import sys +import os +import functools +from contextlib import contextmanager +from distutils import sysconfig + +@contextmanager +def add_path(path): + sys.path.insert(0, path) + yield + sys.path.pop(0) + +# Make sure that we always have the PySide containing package first. +# This is crucial for the mapping during reload in the tests. +package_dir = __file__ +for _ in "four": + package_dir = os.path.dirname(package_dir) +assured_site_packages = functools.partial(add_path, package_dir) + +with assured_site_packages(): + if sys.version_info >= (3,): + from PySide2.support.signature import inspect + from PySide2.support.signature import typing + else: + import inspect + namespace = inspect.__dict__ + from PySide2.support.signature import backport_inspect as inspect + inspect.__dict__.update(namespace) + from PySide2.support.signature import parser +# Note also that during the tests we have a different encodind that would +# break the Python license decorated files without an encoding line. + +# name used in signature.cpp +def pyside_type_init(*args, **kw): + with assured_site_packages(): + return parser.pyside_type_init(*args, **kw) + +# name used in signature.cpp +def create_signature(props, sig_kind): + if not props: + # empty signatures string + return + if isinstance(props["multi"], list): + return list(create_signature(elem, sig_kind) + for elem in props["multi"]) + varnames = props["varnames"] + if sig_kind == "method": + varnames = ("self",) + varnames + elif sig_kind == "staticmethod": + pass + elif sig_kind == "classmethod": + varnames = ("klass",) + varnames + else: + raise SystemError("Methods must be normal, staticmethod or " + "classmethod") + argstr = ", ".join(varnames) + fakefunc = eval("lambda {}: None".format(argstr)) + fakefunc.__name__ = props["name"] + fakefunc.__defaults__ = props["defaults"] + fakefunc.__kwdefaults__ = props["kwdefaults"] + fakefunc.__annotations__ = props["annotations"] + return inspect._signature_from_function(inspect.Signature, fakefunc) + +# end of file |