// See if we can find an attribute in the Qt meta-type system. This is
// primarily to support access to JavaScript (e.g. QDeclarativeItem) so we
// don't support overloads.
PyObject *qpycore_qobject_getattr(QObject *qobj, PyObject *py_qobj,
const char *name)
{
const QMetaObject *mo = qobj->metaObject();
// Try and find a method with the name.
QMetaMethod method;
int method_index = -1;
// Count down to allow overrides (assuming they are possible).
for (int m = mo->methodCount() - 1; m >= 0; --m)
{
method = mo->method(m);
#if QT_VERSION >= 0x040500
if (method.methodType() == QMetaMethod::Constructor)
continue;
#endif
// Get the method name.
#if QT_VERSION >= 0x050000
QByteArray mname(method.methodSignature());
#else
QByteArray mname(method.signature());
#endif
int idx = mname.indexOf('(');
if (idx >= 0)
mname.truncate(idx);
if (mname == name)
{
method_index = m;
break;
}
}
if (method_index < 0)
{
// Replicate the standard Python exception.
PyErr_Format(PyExc_AttributeError, "'%s' object has no attribute '%s'",
Py_TYPE(py_qobj)->tp_name, name);
return 0;
}
// Get the value to return. Note that this is recreated each time. We
// could put a descriptor in the type dictionary to satisfy the request in
// future but the typical use case is getting a value from a C++ proxy
// (e.g. QDeclarativeItem) and we can't assume that what is being proxied
// is the same each time.
PyObject *value;
if (method.methodType() == QMetaMethod::Signal)
{
// We need to keep explicit references to the unbound signals (because
// we don't use the type dictionary to do so) because they own the
// parsed signature which may be needed by a PyQtProxy at some point.
typedef QHash<QByteArray, PyObject *> SignalHash;
static SignalHash *sig_hash = 0;
// For crappy compilers.
if (!sig_hash)
sig_hash = new SignalHash;
PyObject *sig_obj;
#if QT_VERSION >= 0x050000
QByteArray sig_str(method.methodSignature());
#else
QByteArray sig_str(method.signature());
#endif
SignalHash::const_iterator it = sig_hash->find(sig_str);
if (it == sig_hash->end())
{
sig_obj = (PyObject *)qpycore_pyqtSignal_New(sig_str.constData());
if (!sig_obj)
return 0;
sig_hash->insert(sig_str, sig_obj);
}
else
{
sig_obj = it.value();
}
value = qpycore_pyqtBoundSignal_New((qpycore_pyqtSignal *)sig_obj,
py_qobj, qobj);
}
else
{
QByteArray py_name(Py_TYPE(py_qobj)->tp_name);
py_name.append('.');
py_name.append(name);
value = qpycore_pyqtMethodProxy_New(qobj, method_index, py_name);
}
return value;
}
void FunctionArguments::check()
{
if( m_args.size() > m_max_args )
{
std::string msg = m_function_name;
msg += "() takes exactly ";
msg += int_to_string( m_max_args );
msg += " arguments (";
msg += int_to_string( m_args.size() );
msg += " given)";
throw Py::TypeError( msg );
}
Py::Tuple::size_type t_i;
// place all the positional args in the checked args dict
for( t_i=0; t_i<m_args.size(); t_i++ )
{
m_checked_args[ m_arg_desc[t_i].m_arg_name ] = m_args[t_i];
}
// look for args by name in the kws dict
for( t_i=0; t_i<m_max_args; t_i++ )
{
const argument_description &arg_desc = m_arg_desc[t_i];
// check for duplicate
if( m_kws.hasKey( arg_desc.m_arg_name ) )
{
if( m_checked_args.hasKey( arg_desc.m_arg_name ) )
{
std::string msg = m_function_name;
msg += "() multiple values for keyword argument '";
msg += arg_desc.m_arg_name;
msg += "'";
throw Py::TypeError( msg );
}
m_checked_args[ arg_desc.m_arg_name ] = m_kws[ arg_desc.m_arg_name ];
}
}
// check for names we dont known about
Py::List::size_type l_i;
Py::List names( m_kws.keys() );
for( l_i=0; l_i< names.length(); l_i++ )
{
bool found = false;
Py::String py_name( names[l_i] );
std::string name( py_name.as_std_string( g_utf_8 ) );
for( t_i=0; t_i<m_max_args; t_i++ )
{
if( name == m_arg_desc[t_i].m_arg_name )
{
found = true;
break;
}
}
if( !found )
{
std::string msg = m_function_name;
msg += "() got an unexpected keyword argument '";
msg += name;
msg += "'";
throw Py::TypeError( msg );
}
}
// check for min args
for( t_i=0; t_i<m_min_args; t_i++ )
{
const argument_description &arg_desc = m_arg_desc[t_i];
// check for duplicate
if( !m_checked_args.hasKey( arg_desc.m_arg_name ) )
{
std::string msg = m_function_name;
msg += "() required argument '";
msg += arg_desc.m_arg_name;
msg += "'";
throw Py::TypeError( msg );
}
}
}
