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# Copyright (c) 2015-2016 Claudiu Popa <pcmanticore@gmail.com>
# Copyright (c) 2016 Ceridwen <ceridwenv@gmail.com>
# Copyright (c) 2017 Roy Wright <roy@wright.org>
# Copyright (c) 2018 Ashley Whetter <ashley@awhetter.co.uk>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""Astroid hooks for the PyQT library."""
from astroid import MANAGER, register_module_extender
from astroid.builder import AstroidBuilder
from astroid import nodes
from astroid import parse
def _looks_like_signal(node, signal_name="pyqtSignal"):
if "__class__" in node.instance_attrs:
try:
cls = node.instance_attrs["__class__"][0]
return cls.name == signal_name
except AttributeError:
# return False if the cls does not have a name attribute
pass
return False
def transform_pyqt_signal(node):
module = parse(
"""
class pyqtSignal(object):
def connect(self, slot, type=None, no_receiver_check=False):
pass
def disconnect(self, slot):
pass
def emit(self, *args):
pass
"""
)
signal_cls = module["pyqtSignal"]
node.instance_attrs["emit"] = signal_cls["emit"]
node.instance_attrs["disconnect"] = signal_cls["disconnect"]
node.instance_attrs["connect"] = signal_cls["connect"]
def transform_pyside_signal(node):
module = parse(
"""
class NotPySideSignal(object):
def connect(self, receiver, type=None):
pass
def disconnect(self, receiver):
pass
def emit(self, *args):
pass
"""
)
signal_cls = module["NotPySideSignal"]
node.instance_attrs["connect"] = signal_cls["connect"]
node.instance_attrs["disconnect"] = signal_cls["disconnect"]
node.instance_attrs["emit"] = signal_cls["emit"]
def pyqt4_qtcore_transform():
return AstroidBuilder(MANAGER).string_build(
"""
def SIGNAL(signal_name): pass
class QObject(object):
def emit(self, signal): pass
"""
)
register_module_extender(MANAGER, "PyQt4.QtCore", pyqt4_qtcore_transform)
MANAGER.register_transform(nodes.FunctionDef, transform_pyqt_signal, _looks_like_signal)
MANAGER.register_transform(
nodes.ClassDef,
transform_pyside_signal,
lambda node: node.qname() in ("PySide.QtCore.Signal", "PySide2.QtCore.Signal"),
)
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