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/*
* This file is part of the Shiboken Python Bindings Generator project.
*
* Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
*
* Contact: PySide team <contact@pyside.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* version 2.1 as published by the Free Software Foundation. Please
* review the following information to ensure the GNU Lesser General
* Public License version 2.1 requirements will be met:
* http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
*
* As a special exception to the GNU Lesser General Public License
* version 2.1, the object code form of a "work that uses the Library"
* may incorporate material from a header file that is part of the
* Library. You may distribute such object code under terms of your
* choice, provided that the incorporated material (i) does not exceed
* more than 5% of the total size of the Library; and (ii) is limited to
* numerical parameters, data structure layouts, accessors, macros,
* inline functions and templates.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#include "signalmanager.h"
#include <QHash>
#include <QStringList>
#include <QMetaMethod>
#include <autodecref.h>
#include <QDebug>
#include <limits>
#if QSLOT_CODE != 1 || QSIGNAL_CODE != 2
#error QSLOT_CODE and/or QSIGNAL_CODE changed! change the hardcoded stuff to the correct value!
#endif
#define PYSIDE_SLOT '1'
#define PYSIDE_SIGNAL '2'
#include "typeresolver.h"
#include "globalreceiver.h"
using namespace PySide;
bool PySide::isSignal(const char* signal)
{
return signal[0] == PYSIDE_SIGNAL;
}
bool PySide::checkSignal(const char* signal)
{
if (signal[0] != PYSIDE_SIGNAL) {
PyErr_SetString(PyExc_TypeError, "Use the function PySide.QtCore.SIGNAL on signals");
return false;
}
return true;
}
QString PySide::getCallbackSignature(const char* signal, PyObject* callback)
{
PyObject* function;
int useSelf = PyMethod_Check(callback);
if (useSelf) {
function = PyMethod_GET_FUNCTION(callback);
} else {
function = callback;
}
PyCodeObject* objCode = reinterpret_cast<PyCodeObject*>(PyFunction_GET_CODE(function));
QString signature(PyString_AS_STRING(objCode->co_name));
signature.append(QString::number(quint64(callback), 16));
signature.append('(');
int numArgs = objCode->co_flags & CO_VARARGS ? -1 : objCode->co_argcount;
QStringList args = getArgsFromSignature(signal);
if (numArgs == -1)
numArgs = std::numeric_limits<int>::max();
while (args.count() > numArgs - useSelf) {
args.removeLast();
}
signature.append(args.join(","));
signature.append(')');
return signature;
}
QStringList PySide::getArgsFromSignature(const char* signature)
{
QString qsignature(signature);
QStringList result;
QRegExp splitRegex("\\s*,\\s*");
if (qsignature.contains("()") || qsignature.contains("(void)")) {
return result;
} else if (qsignature.contains('(')) {
//get args types
QString types = qsignature.replace(QRegExp(".+\\((.*)\\)"), "\\1");
result = types.split(splitRegex);
}
return result;
}
struct SignalManager::SignalManagerPrivate
{
GlobalReceiver m_globalReceiver;
};
SignalManager::SignalManager() : m_d(new SignalManagerPrivate)
{
}
SignalManager::~SignalManager()
{
delete m_d;
}
SignalManager& SignalManager::instance()
{
static SignalManager me;
return me;
}
QObject* SignalManager::globalReceiver()
{
return &m_d->m_globalReceiver;
}
void SignalManager::addGlobalSlot(const char* slot, PyObject* callback)
{
m_d->m_globalReceiver.addSlot(slot, callback);
}
bool SignalManager::emitSignal(QObject* source, const char* signal, PyObject* args)
{
if (!checkSignal(signal))
return false;
signal++;
int argsGiven = PySequence_Size(args);
int signalIndex = source->metaObject()->indexOfSignal(signal);
if (signalIndex != -1) {
QStringList argTypes = getArgsFromSignature(signal);
if (argsGiven > argTypes.count()) {
PyErr_SetString(PyExc_TypeError, "Too many arguments for this signal.");
return false;
}
void* signalArgs[argsGiven+1];
signalArgs[0] = 0;
for (int i = 0; i < argsGiven; ++i)
signalArgs[i+1] = TypeResolver::get(argTypes[i])->toCpp(PySequence_GetItem(args, i));
QMetaObject::activate(source, signalIndex, signalArgs);
// FIXME: This will cause troubles with non-direct connections.
for (int i = 0; i < argsGiven; ++i)
TypeResolver::get(argTypes[i])->deleteObject(signalArgs[i+1]);
return true;
}
return false;
}
int PySide::SignalManager::qt_metacall(QObject* object, QMetaObject::Call call, int id, void** args)
{
const QMetaObject* metaObject = object->metaObject();
// only meta method invocation is supported right now.
if (call != QMetaObject::InvokeMetaMethod) {
qWarning("Only meta method invocation is supported right now by PySide.");
return id - metaObject->methodCount();
}
QMetaMethod method = metaObject->method(id);
if (method.methodType() == QMetaMethod::Signal) {
// emit python signal
QMetaObject::activate(object, id, args);
} else {
// call python slot
QList<QByteArray> paramTypes = method.parameterTypes();
PyObject* self = Shiboken::BindingManager::instance().retrieveWrapper(object);
Shiboken::AutoDecRef preparedArgs(PyTuple_New(paramTypes.count()+1));
PyTuple_SET_ITEM(preparedArgs.object(), 0, self);
for (int i = 0, max = paramTypes.count(); i < max; ++i) {
PyObject* arg = TypeResolver::get(paramTypes[i].constData())->toPython(args[i+1]);
PyTuple_SET_ITEM(preparedArgs.object(), i + 1, arg);
}
QString methodName = method.signature();
methodName = methodName.left(methodName.indexOf('('));
Shiboken::AutoDecRef pyMethodName(PyString_FromString(qPrintable(methodName)));
Shiboken::AutoDecRef pyMethod(PyObject_GetAttr(self, pyMethodName));
Shiboken::AutoDecRef retval(PyObject_CallObject(pyMethod, preparedArgs));
if (!retval)
qWarning("Error calling slot");
}
return -1;
}
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