diff options
Diffstat (limited to 'sources/pyside6/libpyside/pysidesignal.cpp')
| -rw-r--r-- | sources/pyside6/libpyside/pysidesignal.cpp | 1337 |
1 files changed, 1337 insertions, 0 deletions
diff --git a/sources/pyside6/libpyside/pysidesignal.cpp b/sources/pyside6/libpyside/pysidesignal.cpp new file mode 100644 index 000000000..11e07cb04 --- /dev/null +++ b/sources/pyside6/libpyside/pysidesignal.cpp @@ -0,0 +1,1337 @@ +// Copyright (C) 2020 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only + +#include <sbkpython.h> +#include "pysidesignal.h" +#include "pysidesignal_p.h" +#include "pysideqobject.h" +#include "pysideutils.h" +#include "pysidestaticstrings.h" +#include "pysideweakref.h" +#include "signalmanager.h" + +#include <shiboken.h> + +#include <QtCore/QByteArray> +#include <QtCore/QDebug> +#include <QtCore/QHash> +#include <QtCore/QObject> +#include <QtCore/QMetaMethod> +#include <QtCore/QMetaObject> +#include <pep384ext.h> +#include <signature.h> + +#include <algorithm> +#include <optional> +#include <utility> +#include <cstring> + +#define QT_SIGNAL_SENTINEL '2' + +using namespace Qt::StringLiterals; + +QDebug operator<<(QDebug debug, const PySideSignalData::Signature &s) +{ + QDebugStateSaver saver(debug); + debug.noquote(); + debug.nospace(); + debug << "Signature(\"" << s.signature << '"'; + if (s.attributes) + debug << ", attributes=" << s.attributes; + debug << ')'; + return debug; +} + +QDebug operator<<(QDebug debug, const PySideSignalData &d) +{ + QDebugStateSaver saver(debug); + debug.noquote(); + debug.nospace(); + debug << "PySideSignalData(\"" << d.signalName << "\", " + << d.signatures; + if (!d.signalArguments.isEmpty()) + debug << ", signalArguments=" << d.signalArguments; + debug << ')'; + return debug; +} + +QDebug operator<<(QDebug debug, const PySideSignalInstancePrivate &d) +{ + QDebugStateSaver saver(debug); + debug.noquote(); + debug.nospace(); + debug << "PySideSignalInstancePrivate(\"" << d.signalName + << "\", \"" << d.signature << '"'; + if (d.attributes) + debug << ", attributes=" << d.attributes; + if (d.homonymousMethod) + debug << ", homonymousMethod=" << d.homonymousMethod; + debug << ')'; + return debug; +} + +static bool connection_Check(PyObject *o) +{ + if (o == nullptr || o == Py_None) + return false; + static QByteArray typeName = QByteArrayLiteral("PySide") + + QByteArray::number(QT_VERSION_MAJOR) + + QByteArrayLiteral(".QtCore.QMetaObject.Connection"); + return std::strcmp(o->ob_type->tp_name, typeName.constData()) == 0; +} + +static std::optional<QByteArrayList> parseArgumentNames(PyObject *argArguments) +{ + QByteArrayList result; + if (argArguments == nullptr) + return result; + // Prevent a string from being split into a sequence of characters + if (PySequence_Check(argArguments) == 0 || PyUnicode_Check(argArguments) != 0) + return std::nullopt; + const Py_ssize_t argumentSize = PySequence_Size(argArguments); + result.reserve(argumentSize); + for (Py_ssize_t i = 0; i < argumentSize; ++i) { + Shiboken::AutoDecRef item(PySequence_GetItem(argArguments, i)); + if (PyUnicode_Check(item.object()) == 0) + return std::nullopt; + Shiboken::AutoDecRef strObj(PyUnicode_AsUTF8String(item)); + const char *s = PyBytes_AsString(strObj); + if (s == nullptr) + return std::nullopt; + result.append(QByteArray(s)); + } + return result; +} + +namespace PySide::Signal { + static QByteArray buildSignature(const QByteArray &, const QByteArray &); + static void instanceInitialize(PySideSignalInstance *, PyObject *, PySideSignal *, PyObject *, int); + static PySideSignalData::Signature parseSignature(PyObject *); + static PyObject *buildQtCompatible(const QByteArray &); +} // PySide::Signal + +extern "C" +{ + +// Signal methods +static int signalTpInit(PyObject *, PyObject *, PyObject *); +static void signalFree(void *); +static void signalInstanceFree(void *); +static PyObject *signalGetItem(PyObject *self, PyObject *key); +static PyObject *signalGetAttr(PyObject *self, PyObject *name); +static PyObject *signalToString(PyObject *self); +static PyObject *signalDescrGet(PyObject *self, PyObject *obj, PyObject *type); + +// Signal Instance methods +static PyObject *signalInstanceConnect(PyObject *, PyObject *, PyObject *); +static PyObject *signalInstanceDisconnect(PyObject *, PyObject *); +static PyObject *signalInstanceEmit(PyObject *, PyObject *); +static PyObject *signalInstanceGetItem(PyObject *, PyObject *); + +static PyObject *signalInstanceCall(PyObject *self, PyObject *args, PyObject *kw); +static PyObject *signalCall(PyObject *, PyObject *, PyObject *); + +static PyObject *metaSignalCheck(PyObject *, PyObject *); + + +static PyMethodDef MetaSignal_tp_methods[] = { + {"__instancecheck__", reinterpret_cast<PyCFunction>(metaSignalCheck), + METH_O|METH_STATIC, nullptr}, + {nullptr, nullptr, 0, nullptr} +}; + +static PyTypeObject *createMetaSignalType() +{ + PyType_Slot PySideMetaSignalType_slots[] = { + {Py_tp_methods, reinterpret_cast<void *>(MetaSignal_tp_methods)}, + {Py_tp_base, reinterpret_cast<void *>(&PyType_Type)}, + {Py_tp_free, reinterpret_cast<void *>(PyObject_GC_Del)}, + {Py_tp_dealloc, reinterpret_cast<void *>(Sbk_object_dealloc)}, + {0, nullptr} + }; + + PyType_Spec PySideMetaSignalType_spec = { + "2:PySide6.QtCore.MetaSignal", + 0, + // sizeof(PyHeapTypeObject) is filled in by SbkType_FromSpec + // which calls PyType_Ready which calls inherit_special. + 0, + Py_TPFLAGS_DEFAULT, + PySideMetaSignalType_slots, + }; + + return SbkType_FromSpec(&PySideMetaSignalType_spec); +} + +static PyTypeObject *PySideMetaSignal_TypeF(void) +{ + static auto *type = createMetaSignalType(); + return type; +} + +static PyTypeObject *createSignalType() +{ + PyType_Slot PySideSignalType_slots[] = { + {Py_mp_subscript, reinterpret_cast<void *>(signalGetItem)}, + {Py_tp_getattro, reinterpret_cast<void *>(signalGetAttr)}, + {Py_tp_descr_get, reinterpret_cast<void *>(signalDescrGet)}, + {Py_tp_call, reinterpret_cast<void *>(signalCall)}, + {Py_tp_str, reinterpret_cast<void *>(signalToString)}, + {Py_tp_init, reinterpret_cast<void *>(signalTpInit)}, + {Py_tp_new, reinterpret_cast<void *>(PyType_GenericNew)}, + {Py_tp_free, reinterpret_cast<void *>(signalFree)}, + {Py_tp_dealloc, reinterpret_cast<void *>(Sbk_object_dealloc)}, + {0, nullptr} + }; + + PyType_Spec PySideSignalType_spec = { + "2:PySide6.QtCore.Signal", + sizeof(PySideSignal), + 0, + Py_TPFLAGS_DEFAULT, + PySideSignalType_slots, + }; + + return SbkType_FromSpecWithMeta(&PySideSignalType_spec, PySideMetaSignal_TypeF()); +} + +PyTypeObject *PySideSignal_TypeF(void) +{ + static auto *type = createSignalType(); + return type; +} + +static PyObject *signalInstanceRepr(PyObject *obSelf) +{ + auto *self = reinterpret_cast<PySideSignalInstance *>(obSelf); + auto *typeName = Py_TYPE(obSelf)->tp_name; + return Shiboken::String::fromFormat("<%s %s at %p>", typeName, + self->d ? self->d->signature.constData() + : "(no signature)", obSelf); +} + +static PyMethodDef SignalInstance_methods[] = { + {"connect", reinterpret_cast<PyCFunction>(signalInstanceConnect), + METH_VARARGS|METH_KEYWORDS, nullptr}, + {"disconnect", signalInstanceDisconnect, METH_VARARGS, nullptr}, + {"emit", signalInstanceEmit, METH_VARARGS, nullptr}, + {nullptr, nullptr, 0, nullptr} /* Sentinel */ +}; + +static PyTypeObject *createSignalInstanceType() +{ + PyType_Slot PySideSignalInstanceType_slots[] = { + {Py_mp_subscript, reinterpret_cast<void *>(signalInstanceGetItem)}, + {Py_tp_call, reinterpret_cast<void *>(signalInstanceCall)}, + {Py_tp_methods, reinterpret_cast<void *>(SignalInstance_methods)}, + {Py_tp_repr, reinterpret_cast<void *>(signalInstanceRepr)}, + {Py_tp_new, reinterpret_cast<void *>(PyType_GenericNew)}, + {Py_tp_free, reinterpret_cast<void *>(signalInstanceFree)}, + {Py_tp_dealloc, reinterpret_cast<void *>(Sbk_object_dealloc)}, + {0, nullptr} + }; + + PyType_Spec PySideSignalInstanceType_spec = { + "2:PySide6.QtCore.SignalInstance", + sizeof(PySideSignalInstance), + 0, + Py_TPFLAGS_DEFAULT, + PySideSignalInstanceType_slots, + }; + + return SbkType_FromSpec(&PySideSignalInstanceType_spec); +} + +PyTypeObject *PySideSignalInstance_TypeF(void) +{ + static auto *type = createSignalInstanceType(); + return type; +} + +static int signalTpInit(PyObject *obSelf, PyObject *args, PyObject *kwds) +{ + static PyObject * const emptyTuple = PyTuple_New(0); + static const char *kwlist[] = {"name", "arguments", nullptr}; + char *argName = nullptr; + PyObject *argArguments = nullptr; + + if (!PyArg_ParseTupleAndKeywords(emptyTuple, kwds, + "|sO:QtCore.Signal{name, arguments}", + const_cast<char **>(kwlist), &argName, &argArguments)) + return -1; + + bool tupledArgs = false; + PySideSignal *self = reinterpret_cast<PySideSignal *>(obSelf); + if (!self->data) + self->data = new PySideSignalData; + if (argName) + self->data->signalName = argName; + + auto argumentNamesOpt = parseArgumentNames(argArguments); + if (!argumentNamesOpt.has_value()) { + PyErr_SetString(PyExc_TypeError, "'arguments' must be a sequence of strings."); + return -1; + } + self->data->signalArguments = argumentNamesOpt.value(); + + for (Py_ssize_t i = 0, i_max = PyTuple_Size(args); i < i_max; i++) { + PyObject *arg = PyTuple_GET_ITEM(args, i); + if (PySequence_Check(arg) && !Shiboken::String::check(arg) && !PyEnumMeta_Check(arg)) { + tupledArgs = true; + self->data->signatures.append(PySide::Signal::parseSignature(arg)); + } + } + + if (!tupledArgs) + self->data->signatures.append(PySide::Signal::parseSignature(args)); + + return 0; +} + +static void signalFree(void *vself) +{ + auto pySelf = reinterpret_cast<PyObject *>(vself); + auto self = reinterpret_cast<PySideSignal *>(vself); + if (self->data) { + delete self->data; + self->data = nullptr; + } + Py_XDECREF(self->homonymousMethod); + self->homonymousMethod = nullptr; + + PepExt_TypeCallFree(Py_TYPE(pySelf)->tp_base, self); +} + +static PyObject *signalGetItem(PyObject *obSelf, PyObject *key) +{ + auto self = reinterpret_cast<PySideSignal *>(obSelf); + QByteArray sigKey; + if (key) { + sigKey = PySide::Signal::parseSignature(key).signature; + } else { + sigKey = self->data == nullptr || self->data->signatures.isEmpty() + ? PySide::Signal::voidType() : self->data->signatures.constFirst().signature; + } + auto sig = PySide::Signal::buildSignature(self->data->signalName, sigKey); + return Shiboken::String::fromCString(sig.constData()); +} + +static PyObject *signalToString(PyObject *obSelf) +{ + auto self = reinterpret_cast<PySideSignal *>(obSelf); + QByteArray result; + if (self->data == nullptr || self->data->signatures.isEmpty()) { + result = "<invalid>"_ba; + } else { + for (const auto &signature : std::as_const(self->data->signatures)) { + if (!result.isEmpty()) + result += "; "_ba; + result += PySide::Signal::buildSignature(self->data->signalName, + signature.signature); + } + } + return Shiboken::String::fromCString(result.constData()); +} + +static PyObject *signalGetAttr(PyObject *obSelf, PyObject *name) +{ + auto self = reinterpret_cast<PySideSignal *>(obSelf); + + if (PyUnicode_CompareWithASCIIString(name, "signatures") != 0) + return PyObject_GenericGetAttr(obSelf, name); + + auto nelems = self->data->signatures.count(); + PyObject *tuple = PyTuple_New(nelems); + + for (Py_ssize_t idx = 0; idx < nelems; ++idx) { + QByteArray sigKey = self->data->signatures.at(idx).signature; + auto sig = PySide::Signal::buildSignature(self->data->signalName, sigKey); + PyObject *entry = Shiboken::String::fromCString(sig.constData()); + PyTuple_SetItem(tuple, idx, entry); + } + return tuple; +} + +static void signalInstanceFree(void *vself) +{ + auto pySelf = reinterpret_cast<PyObject *>(vself); + auto self = reinterpret_cast<PySideSignalInstance *>(vself); + + PySideSignalInstancePrivate *dataPvt = self->d; + if (dataPvt) { + Py_XDECREF(dataPvt->homonymousMethod); + + if (dataPvt->next) { + Py_DECREF(dataPvt->next); + dataPvt->next = nullptr; + } + delete dataPvt; + self->d = nullptr; + } + self->deleted = true; + PepExt_TypeCallFree(Py_TYPE(pySelf)->tp_base, self); +} + +// PYSIDE-1523: PyFunction_Check is not accepting compiled functions and +// PyMethod_Check is not allowing compiled methods, therefore also lookup +// "im_func" and "__code__" attributes, we allow for that with a dedicated +// function handling both. + +struct FunctionArgumentsResult +{ + PyObject *function = nullptr; + PepCodeObject *objCode = nullptr; + PyObject *functionName = nullptr; + bool isMethod = false; +}; + +static FunctionArgumentsResult extractFunctionArgumentsFromSlot(PyObject *slot) +{ + FunctionArgumentsResult ret; + ret.isMethod = PyMethod_Check(slot); + const bool isFunction = PyFunction_Check(slot); + + if (ret.isMethod || isFunction) { + ret.function = ret.isMethod ? PyMethod_GET_FUNCTION(slot) : slot; + ret.objCode = reinterpret_cast<PepCodeObject *>(PyFunction_GET_CODE(ret.function)); + ret.functionName = PepFunction_GetName(ret.function); + + } else if (PySide::isCompiledMethod(slot)) { + // PYSIDE-1523: PyFunction_Check and PyMethod_Check are not accepting compiled forms, we + // just go by attributes. + ret.isMethod = true; + + ret.function = PyObject_GetAttr(slot, PySide::PySideName::im_func()); + // Not retaining a reference inline with what PyMethod_GET_FUNCTION does. + Py_DECREF(ret.function); + + ret.functionName = PyObject_GetAttr(ret.function, PySide::PySideMagicName::name()); + // Not retaining a reference inline with what PepFunction_GetName does. + Py_DECREF(ret.functionName); + + ret.objCode = reinterpret_cast<PepCodeObject *>( + PyObject_GetAttr(ret.function, PySide::PySideMagicName::code())); + // Not retaining a reference inline with what PyFunction_GET_CODE does. + Py_XDECREF(ret.objCode); + + // Should not happen, but lets handle it gracefully, maybe Nuitka one day + // makes these optional, or somebody defined a type named like it without + // it being actually being that. + if (ret.objCode == nullptr) + ret.function = nullptr; + } else if (strcmp(Py_TYPE(slot)->tp_name, "compiled_function") == 0) { + ret.isMethod = false; + ret.function = slot; + + ret.functionName = PyObject_GetAttr(ret.function, PySide::PySideMagicName::name()); + // Not retaining a reference inline with what PepFunction_GetName does. + Py_DECREF(ret.functionName); + + ret.objCode = reinterpret_cast<PepCodeObject *>( + PyObject_GetAttr(ret.function, PySide::PySideMagicName::code())); + // Not retaining a reference inline with what PyFunction_GET_CODE does. + Py_XDECREF(ret.objCode); + + // Should not happen, but lets handle it gracefully, maybe Nuitka one day + // makes these optional, or somebody defined a type named like it without + // it being actually being that. + if (ret.objCode == nullptr) + ret.function = nullptr; + } + // any other callback + return ret; +} + +struct ArgCount +{ + int min; + int max; +}; + +// Return a pair of minimum / arg count "foo(p1, p2=0)" -> {1, 2} +ArgCount argCount(const FunctionArgumentsResult &args) +{ + Q_ASSERT(args.objCode); + ArgCount result{-1, -1}; + if ((PepCode_GET_FLAGS(args.objCode) & CO_VARARGS) == 0) { + result.min = result.max = PepCode_GET_ARGCOUNT(args.objCode); + if (args.function != nullptr) { + if (auto *defaultArgs = PepFunction_GetDefaults(args.function)) + result.min -= PyTuple_Size(defaultArgs); + } + } + return result; +} + +// Find Signal Instance for argument count. +static PySideSignalInstance *findSignalInstance(PySideSignalInstance *source, int argCount) +{ + for (auto *si = source; si != nullptr; si = si->d->next) { + if (si->d->argCount == argCount) + return si; + } + return nullptr; +} + +static PyObject *signalInstanceConnect(PyObject *self, PyObject *args, PyObject *kwds) +{ + PyObject *slot = nullptr; + PyObject *type = nullptr; + static const char *kwlist[] = {"slot", "type", nullptr}; + + if (!PyArg_ParseTupleAndKeywords(args, kwds, + "O|O:SignalInstance", const_cast<char **>(kwlist), &slot, &type)) + return nullptr; + + PySideSignalInstance *source = reinterpret_cast<PySideSignalInstance *>(self); + if (!source->d) + return PyErr_Format(PyExc_RuntimeError, "cannot connect uninitialized SignalInstance"); + if (source->deleted) + return PyErr_Format(PyExc_RuntimeError, "Signal source has been deleted"); + + Shiboken::AutoDecRef pyArgs(PyList_New(0)); + + bool match = false; + if (Py_TYPE(slot) == PySideSignalInstance_TypeF()) { + PySideSignalInstance *sourceWalk = source; + + //find best match + while (sourceWalk && !match) { + auto targetWalk = reinterpret_cast<PySideSignalInstance *>(slot); + while (targetWalk && !match) { + if (QMetaObject::checkConnectArgs(sourceWalk->d->signature, + targetWalk->d->signature)) { + PyList_Append(pyArgs, sourceWalk->d->source); + Shiboken::AutoDecRef sourceSignature(PySide::Signal::buildQtCompatible(sourceWalk->d->signature)); + PyList_Append(pyArgs, sourceSignature); + + PyList_Append(pyArgs, targetWalk->d->source); + Shiboken::AutoDecRef targetSignature(PySide::Signal::buildQtCompatible(targetWalk->d->signature)); + PyList_Append(pyArgs, targetSignature); + + match = true; + } + targetWalk = reinterpret_cast<PySideSignalInstance *>(targetWalk->d->next); + } + sourceWalk = reinterpret_cast<PySideSignalInstance *>(sourceWalk->d->next); + } + } else { + // Check signature of the slot (method or function) to match signal + const auto args = extractFunctionArgumentsFromSlot(slot); + PySideSignalInstance *matchedSlot = nullptr; + + if (args.function != nullptr) { + auto slotArgRange = argCount(args); + if (args.isMethod) { + slotArgRange.min -= 1; + slotArgRange.max -= 1; + } + + // Get signature args + // Iterate the possible types of connection for this signal and compare + // it with slot arguments + for (int slotArgs = slotArgRange.max; + slotArgs >= slotArgRange.min && matchedSlot == nullptr; --slotArgs) { + matchedSlot = findSignalInstance(source, slotArgs); + } + } + + // Adding references to pyArgs + PyList_Append(pyArgs, source->d->source); + + if (matchedSlot != nullptr) { + // If a slot matching the same number of arguments was found, + // include signature to the pyArgs + Shiboken::AutoDecRef signature(PySide::Signal::buildQtCompatible(matchedSlot->d->signature)); + PyList_Append(pyArgs, signature); + } else { + // Try the first by default if the slot was not found + Shiboken::AutoDecRef signature(PySide::Signal::buildQtCompatible(source->d->signature)); + PyList_Append(pyArgs, signature); + } + PyList_Append(pyArgs, slot); + match = true; + } + + if (type) + PyList_Append(pyArgs, type); + + if (match) { + Shiboken::AutoDecRef tupleArgs(PyList_AsTuple(pyArgs)); + Shiboken::AutoDecRef pyMethod(PyObject_GetAttr(source->d->source, + PySide::PySideName::qtConnect())); + if (pyMethod.isNull()) // PYSIDE-79: check if pyMethod exists. + return PyErr_Format(PyExc_RuntimeError, "method 'connect' vanished!"); + PyObject *result = PyObject_CallObject(pyMethod, tupleArgs); + if (connection_Check(result)) + return result; + Py_XDECREF(result); + } + if (!PyErr_Occurred()) // PYSIDE-79: inverse the logic. A Null return needs an error. + PyErr_Format(PyExc_RuntimeError, "Failed to connect signal %s.", + source->d->signature.constData()); + return nullptr; +} + +static int argCountInSignature(const char *signature) +{ + return QByteArray(signature).count(",") + 1; +} + +static PyObject *signalInstanceEmit(PyObject *self, PyObject *args) +{ + PySideSignalInstance *source = reinterpret_cast<PySideSignalInstance *>(self); + if (!source->d) + return PyErr_Format(PyExc_RuntimeError, "cannot emit uninitialized SignalInstance"); + + // PYSIDE-2201: Check if the object has vanished meanwhile. + // Tried to revive it without exception, but this gives problems. + if (source->deleted) + return PyErr_Format(PyExc_RuntimeError, "The SignalInstance object was already deleted"); + + Shiboken::AutoDecRef pyArgs(PyList_New(0)); + int numArgsGiven = PySequence_Fast_GET_SIZE(args); + int numArgsInSignature = argCountInSignature(source->d->signature); + + // If number of arguments given to emit is smaller than the first source signature expects, + // it is possible it's a case of emitting a signal with default parameters. + // Search through all the overloaded signals with the same name, and try to find a signature + // with the same number of arguments as given to emit, and is also marked as a cloned method + // (which in metaobject parlance means a signal with default parameters). + // @TODO: This should be improved to take into account argument types as well. The current + // assumption is there are no signals which are both overloaded on argument types and happen to + // have signatures with default parameters. + if (numArgsGiven < numArgsInSignature) { + PySideSignalInstance *possibleDefaultInstance = source; + while ((possibleDefaultInstance = possibleDefaultInstance->d->next)) { + if (possibleDefaultInstance->d->attributes & QMetaMethod::Cloned + && argCountInSignature(possibleDefaultInstance->d->signature) == numArgsGiven) { + source = possibleDefaultInstance; + break; + } + } + } + Shiboken::AutoDecRef sourceSignature(PySide::Signal::buildQtCompatible(source->d->signature)); + + PyList_Append(pyArgs, sourceSignature); + for (Py_ssize_t i = 0, max = PyTuple_Size(args); i < max; i++) + PyList_Append(pyArgs, PyTuple_GetItem(args, i)); + + Shiboken::AutoDecRef pyMethod(PyObject_GetAttr(source->d->source, + PySide::PySideName::qtEmit())); + + Shiboken::AutoDecRef tupleArgs(PyList_AsTuple(pyArgs)); + return PyObject_CallObject(pyMethod.object(), tupleArgs); +} + +static PyObject *signalInstanceGetItem(PyObject *self, PyObject *key) +{ + auto *firstSignal = reinterpret_cast<PySideSignalInstance *>(self); + const auto &sigName = firstSignal->d->signalName; + const auto sigKey = PySide::Signal::parseSignature(key).signature; + const auto sig = PySide::Signal::buildSignature(sigName, sigKey); + for (auto *data = firstSignal; data != nullptr; data = data->d->next) { + if (data->d->signature == sig) { + PyObject *result = reinterpret_cast<PyObject *>(data); + Py_INCREF(result); + return result; + } + } + + // Build error message with candidates + QByteArray message = "Signature \"" + sig + "\" not found for signal: \"" + + sigName + "\". Available candidates: "; + for (auto *data = firstSignal; data != nullptr; data = data->d->next) { + if (data != firstSignal) + message += ", "; + message += '"' + data->d->signature + '"'; + } + + return PyErr_Format(PyExc_IndexError, message.constData()); +} + +static inline void warnDisconnectFailed(PyObject *aSlot, const QByteArray &signature) +{ + if (PyErr_Occurred() != nullptr) { // avoid "%S" invoking str() when an error is set. + PyErr_WarnFormat(PyExc_RuntimeWarning, 0, "Failed to disconnect (%s) from signal \"%s\".", + Py_TYPE(aSlot)->tp_name, signature.constData()); + } else { + PyErr_WarnFormat(PyExc_RuntimeWarning, 0, "Failed to disconnect (%S) from signal \"%s\".", + aSlot, signature.constData()); + } +} + +static PyObject *signalInstanceDisconnect(PyObject *self, PyObject *args) +{ + auto source = reinterpret_cast<PySideSignalInstance *>(self); + if (!source->d) + return PyErr_Format(PyExc_RuntimeError, "cannot disconnect uninitialized SignalInstance"); + + Shiboken::AutoDecRef pyArgs(PyList_New(0)); + + PyObject *slot = Py_None; + if (PyTuple_Check(args) && PyTuple_GET_SIZE(args)) + slot = PyTuple_GET_ITEM(args, 0); + + bool match = false; + if (Py_TYPE(slot) == PySideSignalInstance_TypeF()) { + PySideSignalInstance *target = reinterpret_cast<PySideSignalInstance *>(slot); + if (QMetaObject::checkConnectArgs(source->d->signature, target->d->signature)) { + PyList_Append(pyArgs, source->d->source); + Shiboken::AutoDecRef source_signature(PySide::Signal::buildQtCompatible(source->d->signature)); + PyList_Append(pyArgs, source_signature); + + PyList_Append(pyArgs, target->d->source); + Shiboken::AutoDecRef target_signature(PySide::Signal::buildQtCompatible(target->d->signature)); + PyList_Append(pyArgs, target_signature); + match = true; + } + } else if (connection_Check(slot)) { + PyList_Append(pyArgs, slot); + match = true; + } else { + //try the first signature + PyList_Append(pyArgs, source->d->source); + Shiboken::AutoDecRef signature(PySide::Signal::buildQtCompatible(source->d->signature)); + PyList_Append(pyArgs, signature); + + // disconnect all, so we need to use the c++ signature disconnect(qobj, signal, 0, 0) + if (slot == Py_None) + PyList_Append(pyArgs, slot); + PyList_Append(pyArgs, slot); + match = true; + } + + if (match) { + Shiboken::AutoDecRef tupleArgs(PyList_AsTuple(pyArgs)); + Shiboken::AutoDecRef pyMethod(PyObject_GetAttr(source->d->source, + PySide::PySideName::qtDisconnect())); + PyObject *result = PyObject_CallObject(pyMethod, tupleArgs); + if (result != Py_True) + warnDisconnectFailed(slot, source->d->signature); + return result; + } + + warnDisconnectFailed(slot, source->d->signature); + Py_RETURN_FALSE; +} + +// PYSIDE-68: Supply the missing __get__ function +static PyObject *signalDescrGet(PyObject *self, PyObject *obj, PyObject * /*type*/) +{ + auto signal = reinterpret_cast<PySideSignal *>(self); + // Return the unbound signal if there is nothing to bind it to. + if (obj == nullptr || obj == Py_None + || !PySide::isQObjectDerived(Py_TYPE(obj), true)) { + Py_INCREF(self); + return self; + } + + // PYSIDE-68-bis: It is important to respect the already cached instance. + Shiboken::AutoDecRef name(Py_BuildValue("s", signal->data->signalName.data())); + auto *dict = SbkObject_GetDict_NoRef(obj); + auto *inst = PyDict_GetItem(dict, name); + if (inst) { + Py_INCREF(inst); + return inst; + } + inst = reinterpret_cast<PyObject *>(PySide::Signal::initialize(signal, name, obj)); + PyObject_SetAttr(obj, name, inst); + return inst; +} + +static PyObject *signalCall(PyObject *self, PyObject *args, PyObject *kw) +{ + auto signal = reinterpret_cast<PySideSignal *>(self); + + // Native C++ signals can't be called like functions, thus we throw an exception. + // The only way calling a signal can succeed (the Python equivalent of C++'s operator() ) + // is when a method with the same name as the signal is attached to an object. + // An example is QProcess::error() (don't check the docs, but the source code of qprocess.h). + if (!signal->homonymousMethod) + return PyErr_Format(PyExc_TypeError, "native Qt signal is not callable"); + + // Check if there exists a method with the same name as the signal, which is also a static + // method in C++ land. + Shiboken::AutoDecRef homonymousMethod(PepExt_Type_CallDescrGet(signal->homonymousMethod, + nullptr, nullptr)); + if (PyCFunction_Check(homonymousMethod.object()) + && (PyCFunction_GET_FLAGS(homonymousMethod.object()) & METH_STATIC)) + return PyObject_Call(homonymousMethod, args, kw); + + // Assumes homonymousMethod is not a static method. + ternaryfunc callFunc = PepExt_Type_GetCallSlot(Py_TYPE(signal->homonymousMethod)); + return callFunc(homonymousMethod, args, kw); +} + +// This function returns a borrowed reference. +static inline PyObject *_getRealCallable(PyObject *func) +{ + static const auto *SignalType = PySideSignal_TypeF(); + static const auto *SignalInstanceType = PySideSignalInstance_TypeF(); + + // If it is a signal, use the (maybe empty) homonymous method. + if (Py_TYPE(func) == SignalType) { + auto *signal = reinterpret_cast<PySideSignal *>(func); + return signal->homonymousMethod; + } + // If it is a signal instance, use the (maybe empty) homonymous method. + if (Py_TYPE(func) == SignalInstanceType) { + auto *signalInstance = reinterpret_cast<PySideSignalInstance *>(func); + return signalInstance->d->homonymousMethod; + } + return func; +} + +// This function returns a borrowed reference. +static PyObject *_getHomonymousMethod(PySideSignalInstance *inst) +{ + if (inst->d->homonymousMethod) + return inst->d->homonymousMethod; + + // PYSIDE-1730: We are searching methods with the same name not only at the same place, + // but walk through the whole mro to find a hidden method with the same name. + auto signalName = inst->d->signalName; + Shiboken::AutoDecRef name(Shiboken::String::fromCString(signalName)); + auto *mro = Py_TYPE(inst->d->source)->tp_mro; + const Py_ssize_t n = PyTuple_GET_SIZE(mro); + + for (Py_ssize_t idx = 0; idx < n; idx++) { + auto *sub_type = reinterpret_cast<PyTypeObject *>(PyTuple_GET_ITEM(mro, idx)); + Shiboken::AutoDecRef tpDict(PepType_GetDict(sub_type)); + auto *hom = PyDict_GetItem(tpDict, name); + PyObject *realFunc{}; + if (hom && PyCallable_Check(hom) && (realFunc = _getRealCallable(hom))) + return realFunc; + } + return nullptr; +} + +static PyObject *signalInstanceCall(PyObject *self, PyObject *args, PyObject *kw) +{ + auto *PySideSignal = reinterpret_cast<PySideSignalInstance *>(self); + auto *hom = _getHomonymousMethod(PySideSignal); + if (!hom) { + PyErr_Format(PyExc_TypeError, "native Qt signal instance '%s' is not callable", + PySideSignal->d->signalName.constData()); + return nullptr; + } + + Shiboken::AutoDecRef homonymousMethod(PepExt_Type_CallDescrGet(hom, PySideSignal->d->source, + nullptr)); + return PyObject_Call(homonymousMethod, args, kw); +} + +static PyObject *metaSignalCheck(PyObject * /* klass */, PyObject *arg) +{ + if (PyType_IsSubtype(Py_TYPE(arg), PySideSignalInstance_TypeF())) + Py_RETURN_TRUE; + Py_RETURN_FALSE; +} + +} // extern "C" + +namespace PySide::Signal { + +static const char *MetaSignal_SignatureStrings[] = { + "PySide6.QtCore.MetaSignal.__instancecheck__(self,object:object)->bool", + nullptr}; // Sentinel + +static const char *Signal_SignatureStrings[] = { + "PySide6.QtCore.Signal(self,*types:type,name:str=nullptr,arguments:typing.List[str]=nullptr)", + "1:PySide6.QtCore.Signal.__get__(self,instance:None,owner:Optional[typing.Any])->" + "PySide6.QtCore.Signal", + "0:PySide6.QtCore.Signal.__get__(self,instance:PySide6.QtCore.QObject," + "owner:Optional[typing.Any])->PySide6.QtCore.SignalInstance", + nullptr}; // Sentinel + +static const char *SignalInstance_SignatureStrings[] = { + "PySide6.QtCore.SignalInstance.connect(self,slot:object," + "type:PySide6.QtCore.Qt.ConnectionType=PySide6.QtCore.Qt.ConnectionType.AutoConnection)" + "->PySide6.QtCore.QMetaObject.Connection", + "PySide6.QtCore.SignalInstance.disconnect(self,slot:object=nullptr)->bool", + "PySide6.QtCore.SignalInstance.emit(self,*args:typing.Any)", + nullptr}; // Sentinel + +void init(PyObject *module) +{ + if (InitSignatureStrings(PySideMetaSignal_TypeF(), MetaSignal_SignatureStrings) < 0) + return; + Py_INCREF(PySideMetaSignal_TypeF()); + auto *obMetaSignal_Type = reinterpret_cast<PyObject *>(PySideMetaSignal_TypeF()); + PyModule_AddObject(module, "MetaSignal", obMetaSignal_Type); + + if (InitSignatureStrings(PySideSignal_TypeF(), Signal_SignatureStrings) < 0) + return; + Py_INCREF(PySideSignal_TypeF()); + auto *obSignal_Type = reinterpret_cast<PyObject *>(PySideSignal_TypeF()); + PyModule_AddObject(module, "Signal", obSignal_Type); + + if (InitSignatureStrings(PySideSignalInstance_TypeF(), SignalInstance_SignatureStrings) < 0) + return; + Py_INCREF(PySideSignalInstance_TypeF()); + auto *obSignalInstance_Type = reinterpret_cast<PyObject *>(PySideSignalInstance_TypeF()); + PyModule_AddObject(module, "SignalInstance", obSignalInstance_Type); +} + +bool checkType(PyObject *pyObj) +{ + if (pyObj) + return PyType_IsSubtype(Py_TYPE(pyObj), PySideSignal_TypeF()); + return false; +} + +bool checkInstanceType(PyObject *pyObj) +{ + return pyObj != nullptr + && PyType_IsSubtype(Py_TYPE(pyObj), PySideSignalInstance_TypeF()) != 0; +} + +void updateSourceObject(PyObject *source) +{ + // TODO: Provide for actual upstream exception handling. + // For now we'll just return early to avoid further issues. + + if (source == nullptr) // Bad input + return; + + Shiboken::AutoDecRef mroIterator(PyObject_GetIter(source->ob_type->tp_mro)); + + if (mroIterator.isNull()) // Not iterable + return; + + Shiboken::AutoDecRef mroItem{}; + auto *dict = SbkObject_GetDict_NoRef(source); + + // PYSIDE-1431: Walk the mro and update. But see PYSIDE-1751 below. + while ((mroItem.reset(PyIter_Next(mroIterator))), mroItem.object()) { + Py_ssize_t pos = 0; + PyObject *key, *value; + auto *type = reinterpret_cast<PyTypeObject *>(mroItem.object()); + Shiboken::AutoDecRef tpDict(PepType_GetDict(type)); + while (PyDict_Next(tpDict, &pos, &key, &value)) { + if (PyObject_TypeCheck(value, PySideSignal_TypeF())) { + // PYSIDE-1751: We only insert an instance into the instance dict, if a signal + // of the same name is in the mro. This is the equivalent action + // as PyObject_SetAttr, but filtered by existing signal names. + if (!PyDict_GetItem(dict, key)) { + auto *inst = PyObject_New(PySideSignalInstance, PySideSignalInstance_TypeF()); + Shiboken::AutoDecRef signalInstance(reinterpret_cast<PyObject *>(inst)); + auto *si = reinterpret_cast<PySideSignalInstance *>(signalInstance.object()); + instanceInitialize(si, key, reinterpret_cast<PySideSignal *>(value), + source, 0); + if (PyDict_SetItem(dict, key, signalInstance) == -1) + return; // An error occurred while setting the attribute + } + } + } + } + + if (PyErr_Occurred()) // An iteration error occurred + return; +} + +QByteArray getTypeName(PyObject *obType) +{ + if (PyType_Check(obType)) { + auto *type = reinterpret_cast<PyTypeObject *>(obType); + if (PyType_IsSubtype(type, SbkObject_TypeF())) + return Shiboken::ObjectType::getOriginalName(type); + // Translate Python types to Qt names + if (Shiboken::String::checkType(type)) + return QByteArrayLiteral("QString"); + if (type == &PyLong_Type) + return QByteArrayLiteral("int"); + if (type == &PyFloat_Type) + return QByteArrayLiteral("double"); + if (type == &PyBool_Type) + return QByteArrayLiteral("bool"); + if (type == &PyList_Type) + return QByteArrayLiteral("QVariantList"); + if (type == &PyDict_Type) + return QByteArrayLiteral("QVariantMap"); + return QByteArrayLiteral("PyObject"); + } + if (obType == Py_None) // Must be checked before as Shiboken::String::check accepts Py_None + return voidType(); + if (Shiboken::String::check(obType)) { + QByteArray result = Shiboken::String::toCString(obType); + if (result == "qreal") + result = sizeof(qreal) == sizeof(double) ? "double" : "float"; + return result; + } + return QByteArray(); +} + +static QByteArray buildSignature(const QByteArray &name, const QByteArray &signature) +{ + return QMetaObject::normalizedSignature(name + '(' + signature + ')'); +} + +static PySideSignalData::Signature parseSignature(PyObject *args) +{ + PySideSignalData::Signature result{{}, QMetaMethod::Compatibility, 0}; + if (args && (Shiboken::String::check(args) || !PyTuple_Check(args))) { + result.signature = getTypeName(args); + result.argCount = 1; + return result; + } + + for (Py_ssize_t i = 0, i_max = PySequence_Size(args); i < i_max; i++) { + Shiboken::AutoDecRef arg(PySequence_GetItem(args, i)); + const auto typeName = getTypeName(arg); + if (!typeName.isEmpty()) { + if (!result.signature.isEmpty()) + result.signature += ','; + result.signature += typeName; + ++result.argCount; + } + } + return result; +} + +static void sourceGone(void *data) +{ + auto *self = reinterpret_cast<PySideSignalInstance *>(data); + self->deleted = true; +} + +static void instanceInitialize(PySideSignalInstance *self, PyObject *name, PySideSignal *signal, PyObject *source, int index) +{ + self->d = new PySideSignalInstancePrivate; + self->deleted = false; + PySideSignalInstancePrivate *selfPvt = self->d; + selfPvt->next = nullptr; + if (signal->data->signalName.isEmpty()) + signal->data->signalName = Shiboken::String::toCString(name); + selfPvt->signalName = signal->data->signalName; + + selfPvt->source = source; + const auto &signature = signal->data->signatures.at(index); + selfPvt->signature = buildSignature(self->d->signalName, signature.signature); + selfPvt->argCount = signature.argCount; + selfPvt->attributes = signature.attributes; + selfPvt->homonymousMethod = nullptr; + if (signal->homonymousMethod) { + selfPvt->homonymousMethod = signal->homonymousMethod; + Py_INCREF(selfPvt->homonymousMethod); + } + // PYSIDE-2201: We have no reference to source. Let's take a weakref to get + // notified when source gets deleted. + PySide::WeakRef::create(source, sourceGone, self); + + index++; + + if (index < signal->data->signatures.size()) { + selfPvt->next = PyObject_New(PySideSignalInstance, PySideSignalInstance_TypeF()); + instanceInitialize(selfPvt->next, name, signal, source, index); + } +} + +PySideSignalInstance *initialize(PySideSignal *self, PyObject *name, PyObject *object) +{ + static PyTypeObject *pyQObjectType = Shiboken::Conversions::getPythonTypeObject("QObject*"); + assert(pyQObjectType); + + if (!PyObject_TypeCheck(object, pyQObjectType)) { + PyErr_Format(PyExc_TypeError, "%s cannot be converted to %s", + Py_TYPE(object)->tp_name, pyQObjectType->tp_name); + return nullptr; + } + + PySideSignalInstance *instance = PyObject_New(PySideSignalInstance, + PySideSignalInstance_TypeF()); + instanceInitialize(instance, name, self, object, 0); + auto sbkObj = reinterpret_cast<SbkObject *>(object); + if (!Shiboken::Object::wasCreatedByPython(sbkObj)) + Py_INCREF(object); // PYSIDE-79: this flag was crucial for a wrapper call. + return instance; +} + +bool connect(PyObject *source, const char *signal, PyObject *callback) +{ + Shiboken::AutoDecRef pyMethod(PyObject_GetAttr(source, + PySide::PySideName::qtConnect())); + if (pyMethod.isNull()) + return false; + + Shiboken::AutoDecRef pySignature(Shiboken::String::fromCString(signal)); + Shiboken::AutoDecRef pyArgs(PyTuple_Pack(3, source, pySignature.object(), callback)); + PyObject *result = PyObject_CallObject(pyMethod, pyArgs); + if (result == Py_False) { + PyErr_Format(PyExc_RuntimeError, "Failed to connect signal %s, to python callable object.", signal); + Py_DECREF(result); + result = nullptr; + } + return result; +} + +PySideSignalInstance *newObjectFromMethod(PyObject *source, const QList<QMetaMethod>& methodList) +{ + PySideSignalInstance *root = nullptr; + PySideSignalInstance *previous = nullptr; + for (const QMetaMethod &m : methodList) { + PySideSignalInstance *item = PyObject_New(PySideSignalInstance, PySideSignalInstance_TypeF()); + if (!root) + root = item; + + if (previous) + previous->d->next = item; + + item->d = new PySideSignalInstancePrivate; + item->deleted = false; + PySideSignalInstancePrivate *selfPvt = item->d; + selfPvt->source = source; + QByteArray cppName(m.methodSignature()); + cppName.truncate(cppName.indexOf('(')); + // separate SignalName + selfPvt->signalName = cppName; + selfPvt->signature = m.methodSignature(); + selfPvt->argCount = int(m.parameterCount()); + selfPvt->attributes = m.attributes(); + selfPvt->homonymousMethod = nullptr; + selfPvt->next = nullptr; + } + return root; +} + +static void _addSignalToWrapper(PyTypeObject *wrapperType, const char *signalName, PySideSignal *signal) +{ + Shiboken::AutoDecRef tpDict(PepType_GetDict(wrapperType)); + auto typeDict = tpDict.object(); + PyObject *homonymousMethod; + if ((homonymousMethod = PyDict_GetItemString(typeDict, signalName))) { + Py_INCREF(homonymousMethod); + signal->homonymousMethod = homonymousMethod; + } + PyDict_SetItemString(typeDict, signalName, reinterpret_cast<PyObject *>(signal)); +} + +// This function is used by qStableSort to promote empty signatures +static bool compareSignals(const PySideSignalData::Signature &sig1, + const PySideSignalData::Signature &sig2) +{ + return sig1.signature.isEmpty() && !sig2.signature.isEmpty(); +} + +static PyObject *buildQtCompatible(const QByteArray &signature) +{ + const auto ba = QT_SIGNAL_SENTINEL + signature; + return Shiboken::String::fromStringAndSize(ba, ba.size()); +} + +void registerSignals(PyTypeObject *pyObj, const QMetaObject *metaObject) +{ + using Signature = PySideSignalData::Signature; + struct MetaSignal + { + QByteArray methodName; + QList<Signature> signatures; + }; + + QList<MetaSignal> signalsFound; + for (int i = metaObject->methodOffset(), max = metaObject->methodCount(); i < max; ++i) { + QMetaMethod method = metaObject->method(i); + + if (method.methodType() == QMetaMethod::Signal) { + QByteArray methodName(method.methodSignature()); + methodName.truncate(methodName.indexOf('(')); + Signature signature{method.parameterTypes().join(','), {}, + short(method.parameterCount())}; + if (method.attributes() & QMetaMethod::Cloned) + signature.attributes = QMetaMethod::Cloned; + auto it = std::find_if(signalsFound.begin(), signalsFound.end(), + [methodName](const MetaSignal &ms) + { return ms.methodName == methodName; }); + if (it != signalsFound.end()) + it->signatures << signature; + else + signalsFound.append(MetaSignal{methodName, {signature}}); + } + } + + for (const auto &metaSignal : std::as_const(signalsFound)) { + PySideSignal *self = PyObject_New(PySideSignal, PySideSignal_TypeF()); + self->data = new PySideSignalData; + self->data->signalName = metaSignal.methodName; + self->homonymousMethod = nullptr; + + // Empty signatures comes first! So they will be the default signal signature + self->data->signatures = metaSignal.signatures; + std::stable_sort(self->data->signatures.begin(), + self->data->signatures.end(), &compareSignals); + + _addSignalToWrapper(pyObj, metaSignal.methodName, self); + Py_DECREF(reinterpret_cast<PyObject *>(self)); + } +} + +PyObject *getObject(PySideSignalInstance *signal) +{ + return signal->d->source; +} + +const char *getSignature(PySideSignalInstance *signal) +{ + return signal->d->signature; +} + +EmitterData getEmitterData(PySideSignalInstance *signal) +{ + EmitterData result; + result.emitter = PySide::convertToQObject(getObject(signal), false); + if (result.emitter != nullptr) { + auto *mo = result.emitter->metaObject(); + result.methodIndex = mo->indexOfMethod(getSignature(signal)); + } + return result; +} + +QByteArrayList getArgsFromSignature(const char *signature, bool *isShortCircuit) +{ + QByteArray qsignature = QByteArray(signature).trimmed(); + QByteArrayList result; + + if (isShortCircuit) + *isShortCircuit = !qsignature.contains(u'('); + if (qsignature.contains("()") || qsignature.contains("(void)")) + return result; + if (qsignature.endsWith(')')) { + const auto paren = qsignature.indexOf('('); + if (paren >= 0) { + qsignature.chop(1); + qsignature.remove(0, paren + 1); + result = qsignature.split(u','); + for (auto &type : result) + type = type.trimmed(); + } + } + return result; +} + +QByteArray getCallbackSignature(const char *signal, QObject *receiver, + PyObject *callback, bool encodeName) +{ + QByteArray functionName; + qsizetype numArgs = -1; + + const auto slotArgs = extractFunctionArgumentsFromSlot(callback); + qsizetype useSelf = slotArgs.isMethod ? 1 : 0; + + if (slotArgs.function != nullptr) { + numArgs = argCount(slotArgs).max; +#ifdef PYPY_VERSION + } else if (Py_TYPE(callback) == PepBuiltinMethod_TypePtr) { + // PYSIDE-535: PyPy has a special builtin method that acts almost like PyCFunction. + Shiboken::AutoDecRef temp(PyObject_GetAttr(callback, Shiboken::PyMagicName::name())); + functionName = Shiboken::String::toCString(temp); + useSelf = true; + + if (receiver) { + // Search for signature on metaobject + const QMetaObject *mo = receiver->metaObject(); + QByteArray prefix(functionName); + prefix += '('; + for (int i = 0; i < mo->methodCount(); i++) { + QMetaMethod me = mo->method(i); + if ((strncmp(me.methodSignature(), prefix, prefix.size()) == 0) && + QMetaObject::checkConnectArgs(signal, me.methodSignature())) { + numArgs = me.parameterTypes().size() + useSelf; + break; + } + } + } +#endif + } else if (PyCFunction_Check(callback)) { + const PyCFunctionObject *funcObj = reinterpret_cast<const PyCFunctionObject *>(callback); + functionName = PepCFunction_GET_NAMESTR(funcObj); + useSelf = PyCFunction_GET_SELF(funcObj) != nullptr ? 1 : 0; + const int flags = PyCFunction_GET_FLAGS(funcObj); + + if (receiver) { + // Search for signature on metaobject + const QMetaObject *mo = receiver->metaObject(); + QByteArray prefix(functionName); + prefix += '('; + for (int i = 0, count = mo->methodCount(); i < count; ++i) { + QMetaMethod me = mo->method(i); + if ((strncmp(me.methodSignature(), prefix, prefix.size()) == 0) && + QMetaObject::checkConnectArgs(signal, me.methodSignature())) { + numArgs = me.parameterTypes().size() + useSelf; + break; + } + } + } + + if (numArgs == -1) { + if (flags & METH_VARARGS) + numArgs = -1; + else if (flags & METH_NOARGS) + numArgs = 0; + } + } else if (PyCallable_Check(callback)) { + functionName = "__callback" + QByteArray::number(quintptr(callback)); + } + + if (functionName.isEmpty() && slotArgs.functionName != nullptr) + functionName = Shiboken::String::toCString(slotArgs.functionName); + Q_ASSERT(!functionName.isEmpty()); + + bool isShortCircuit = false; + + if (functionName.startsWith('<') && functionName.endsWith('>')) { // fix "<lambda>" + functionName[0] = '_'; + functionName[functionName.size() - 1] = '_'; + } + QByteArray signature = encodeName ? codeCallbackName(callback, functionName) : functionName; + QByteArrayList args = getArgsFromSignature(signal, &isShortCircuit); + + if (!isShortCircuit) { + signature.append(u'('); + if (numArgs == -1) + numArgs = std::numeric_limits<qsizetype>::max(); + while (!args.isEmpty() && (args.size() > (numArgs - useSelf))) + args.removeLast(); + signature.append(args.join(',')); + signature.append(')'); + } + return signature; +} + +bool isQtSignal(const char *signal) +{ + return (signal && signal[0] == QT_SIGNAL_SENTINEL); +} + +bool checkQtSignal(const char *signal) +{ + if (!isQtSignal(signal)) { + PyErr_SetString(PyExc_TypeError, "Use the function PySide6.QtCore.SIGNAL on signals"); + return false; + } + return true; +} + +QByteArray codeCallbackName(PyObject *callback, const QByteArray &funcName) +{ + if (PyMethod_Check(callback)) { + PyObject *self = PyMethod_GET_SELF(callback); + PyObject *func = PyMethod_GET_FUNCTION(callback); + return funcName + QByteArray::number(quint64(self), 16) + QByteArray::number(quint64(func), 16); + } + // PYSIDE-1523: Handle the compiled case. + if (PySide::isCompiledMethod(callback)) { + // Not retaining references inline with what PyMethod_GET_(SELF|FUNC) does. + Shiboken::AutoDecRef self(PyObject_GetAttr(callback, PySide::PySideName::im_self())); + Shiboken::AutoDecRef func(PyObject_GetAttr(callback, PySide::PySideName::im_func())); + return funcName + QByteArray::number(quint64(self), 16) + QByteArray::number(quint64(func), 16); + } + return funcName + QByteArray::number(quint64(callback), 16); +} + +QByteArray voidType() +{ + return QByteArrayLiteral("void"); +} + +} //namespace PySide::Signal |