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koffice/lib/kross/python/pythonextension.cpp

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/***************************************************************************
* pythonextension.cpp
* This file is part of the KDE project
* copyright (C)2004-2005 by Sebastian Sauer (mail@dipe.org)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
* 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
* Library General Public License for more details.
* You should have received a copy of the GNU Library General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
***************************************************************************/
#include "pythonextension.h"
#include "pythonobject.h"
#include "../api/variant.h"
#include "../api/dict.h"
#include "../api/exception.h"
using namespace Kross::Python;
PythonExtension::PythonExtension(Kross::Api::Object::Ptr object)
: Py::PythonExtension<PythonExtension>()
, m_object(object)
{
#ifdef KROSS_PYTHON_EXTENSION_CTOR_DEBUG
krossdebug( TQString("Kross::Python::PythonExtension::Constructor objectname='%1' objectclass='%2'").arg(m_object->getName()).arg(m_object->getClassName()) );
#endif
behaviors().name("KrossPythonExtension");
/*
behaviors().doc(
"The common KrossPythonExtension object enables passing "
"of Kross::Api::Object's from C/C++ to Python and "
"backwards in a transparent way."
);
*/
behaviors().supportGetattr();
m_proxymethod = new Py::MethodDefExt<PythonExtension>(
"", // methodname, not needed cause we use the method only internaly.
0, // method that should handle the callback, not needed cause proxyhandler will handle it.
Py::method_varargs_call_handler_t( proxyhandler ), // callback handler
"" // documentation
);
}
PythonExtension::~PythonExtension()
{
#ifdef KROSS_PYTHON_EXTENSION_DTOR_DEBUG
krossdebug( TQString("Kross::Python::PythonExtension::Destructor objectname='%1' objectclass='%2'").arg(m_object->getName()).arg(m_object->getClassName()) );
#endif
delete m_proxymethod;
}
#if 0
Py::Object PythonExtension::str()
{
Kross::Api::Callable* callable = dynamic_cast< Kross::Api::Callable* >(m_object);
TQString s = callable ? callable->getName() : m_object->getClassName();
return toPyObject(s.isEmpty() ? : s);
}
Py::Object PythonExtension::repr()
{
return toPyObject( m_object->toString() );
}
#endif
Py::Object PythonExtension::getattr(const char* n)
{
#ifdef KROSS_PYTHON_EXTENSION_GETATTR_DEBUG
krossdebug( TQString("Kross::Python::PythonExtension::getattr name='%1'").arg(n) );
#endif
if(n[0] == '_') {
if(!strcmp(n, "__methods__")) {
Py::List methods;
TQStringList calls = m_object->getCalls();
for(TQStringList::Iterator it = calls.begin(); it != calls.end(); ++it) {
#ifdef KROSS_PYTHON_EXTENSION_GETATTR_DEBUG
krossdebug( TQString("Kross::Python::PythonExtension::getattr name='%1' callable='%2'").arg(n).arg(*it) );
#endif
methods.append(Py::String( (*it).latin1() ));
}
return methods;
}
if(!strcmp(n, "__members__")) {
Py::List members;
Kross::Api::Callable* callable = dynamic_cast<Kross::Api::Callable*>(m_object.data());
if(callable) {
TQMap<TQString, Kross::Api::Object::Ptr> children = callable->getChildren();
TQMap<TQString, Kross::Api::Object::Ptr>::Iterator it( children.begin() );
for(; it != children.end(); ++it) {
#ifdef KROSS_PYTHON_EXTENSION_GETATTR_DEBUG
krossdebug( TQString("Kross::Python::PythonExtension::getattr n='%1' child='%2'").arg(n).arg(it.key()) );
#endif
members.append(Py::String( it.key().latin1() ));
}
}
return members;
}
//if(n == "__dict__") { krosswarning( TQString("PythonExtension::getattr(%1) __dict__").arg(n) ); return Py::None(); }
//if(n == "__class__") { krosswarning( TQString("PythonExtension::getattr(%1) __class__").arg(n) ); return Py::None(); }
#ifdef KROSS_PYTHON_EXTENSION_GETATTR_DEBUG
krossdebug( TQString("Kross::Python::PythonExtension::getattr name='%1' is a internal name.").arg(n) );
#endif
return Py::PythonExtension<PythonExtension>::getattr_methods(n);
}
// Redirect the call to our static proxy method which will take care
// of handling the call.
Py::Tuple self(2);
self[0] = Py::Object(this);
self[1] = Py::String(n);
return Py::Object(PyCFunction_New( &m_proxymethod->ext_meth_def, self.ptr() ), true);
}
/*
Py::Object PythonExtension::getattr_methods(const char* n)
{
#ifdef KROSS_PYTHON_EXTENSION_GETATTRMETHOD_DEBUG
krossdebug( TQString("PythonExtension::getattr_methods name=%1").arg(n) );
#endif
return Py::PythonExtension<PythonExtension>::getattr_methods(n);
}
int PythonExtension::setattr(const char* name, const Py::Object& value)
{
#ifdef KROSS_PYTHON_EXTENSION_SETATTR_DEBUG
krossdebug( TQString("PythonExtension::setattr name=%1 value=%2").arg(name).arg(value.as_string().c_str()) );
#endif
return Py::PythonExtension<PythonExtension>::setattr(name, value);
}
*/
Kross::Api::List::Ptr PythonExtension::toObject(const Py::Tuple& tuple)
{
#ifdef KROSS_PYTHON_EXTENSION_TOOBJECT_DEBUG
krossdebug( TQString("Kross::Python::PythonExtension::toObject(Py::Tuple)") );
#endif
TQValueList<Kross::Api::Object::Ptr> l;
uint size = tuple.size();
for(uint i = 0; i < size; i++)
l.append( toObject( tuple[i] ) );
return new Kross::Api::List(l);
}
Kross::Api::List::Ptr PythonExtension::toObject(const Py::List& list)
{
#ifdef KROSS_PYTHON_EXTENSION_TOOBJECT_DEBUG
krossdebug( TQString("Kross::Python::PythonExtension::toObject(Py::List)") );
#endif
TQValueList<Kross::Api::Object::Ptr> l;
uint length = list.length();
for(uint i = 0; i < length; i++)
l.append( toObject( list[i] ) );
return new Kross::Api::List(l);
}
Kross::Api::Dict::Ptr PythonExtension::toObject(const Py::Dict& dict)
{
TQMap<TQString, Kross::Api::Object::Ptr> map;
Py::List l = dict.keys();
uint length = l.length();
for(Py::List::size_type i = 0; i < length; ++i) {
const char* n = l[i].str().as_string().c_str();
map.replace(n, toObject( dict[n] ));
}
return new Kross::Api::Dict(map);
}
Kross::Api::Object::Ptr PythonExtension::toObject(const Py::Object& object)
{
#ifdef KROSS_PYTHON_EXTENSION_TOOBJECT_DEBUG
krossdebug( TQString("Kross::Python::PythonExtension::toObject(Py::Object) object='%1'").arg(object.as_string().c_str()) );
#endif
if(object == Py::None())
return 0;
PyTypeObject *type = (PyTypeObject*) object.type().ptr();
#ifdef KROSS_PYTHON_EXTENSION_TOOBJECT_DEBUG
krossdebug( TQString("Kross::Python::PythonExtension::toObject(Py::Object) type='%1'").arg(type->tp_name) );
#endif
if(type == &PyInt_Type)
return new Kross::Api::Variant(int(Py::Int(object)));
if(type == &PyBool_Type)
return new Kross::Api::Variant(TQVariant(object.isTrue()));
if(type == &PyLong_Type)
return new Kross::Api::Variant(TQ_LLONG(long(Py::Long(object))));
if(type == &PyFloat_Type)
return new Kross::Api::Variant(double(Py::Float(object)));
if( PyType_IsSubtype(type,&PyString_Type) ) {
#ifdef Py_USING_UNICODE
/* TODO
if(type == &PyUnicode_Type) {
Py::unicodestring u = Py::String(object).as_unicodestring();
std::string s;
std::copy(u.begin(), u.end(), std::back_inserter(s));
return new Kross::Api::Variant(s.c_str());
}
*/
#endif
return new Kross::Api::Variant(object.as_string().c_str());
}
if(type == &PyTuple_Type)
return toObject(Py::Tuple(object)).data();
if(type == &PyList_Type)
return toObject(Py::List(object)).data();
if(type == &PyDict_Type)
return toObject(Py::Dict(object.ptr())).data();
if(object.isInstance())
return new PythonObject(object);
Py::ExtensionObject<PythonExtension> extobj(object);
PythonExtension* extension = extobj.extensionObject();
if(! extension) {
krosswarning("EXCEPTION in PythonExtension::toObject(): Failed to determinate PythonExtension object.");
throw Py::Exception("Failed to determinate PythonExtension object.");
}
if(! extension->m_object) {
krosswarning("EXCEPTION in PythonExtension::toObject(): Failed to convert the PythonExtension object into a Kross::Api::Object.");
throw Py::Exception("Failed to convert the PythonExtension object into a Kross::Api::Object.");
}
#ifdef KROSS_PYTHON_EXTENSION_TOOBJECT_DEBUG
krossdebug( "Kross::Python::PythonExtension::toObject(Py::Object) successfully converted into Kross::Api::Object." );
#endif
return extension->m_object;
}
const Py::Object PythonExtension::toPyObject(const TQString& s)
{
#ifdef KROSS_PYTHON_EXTENSION_TOPYOBJECT_DEBUG
krossdebug( TQString("Kross::Python::PythonExtension::toPyObject(TQString)") );
#endif
return s.isNull() ? Py::String() : Py::String(s.latin1());
}
const Py::List PythonExtension::toPyObject(const TQStringList& list)
{
#ifdef KROSS_PYTHON_EXTENSION_TOPYOBJECT_DEBUG
krossdebug( TQString("Kross::Python::PythonExtension::toPyObject(TQStringList)") );
#endif
Py::List l;
for(TQStringList::ConstIterator it = list.constBegin(); it != list.constEnd(); ++it)
l.append(toPyObject(*it));
return l;
}
const Py::Dict PythonExtension::toPyObject(const TQMap<TQString, TQVariant>& map)
{
#ifdef KROSS_PYTHON_EXTENSION_TOPYOBJECT_DEBUG
krossdebug( TQString("Kross::Python::PythonExtension::toPyObject(TQMap<TQString,TQVariant>)") );
#endif
Py::Dict d;
for(TQMap<TQString, TQVariant>::ConstIterator it = map.constBegin(); it != map.constEnd(); ++it)
d.setItem(it.key().latin1(), toPyObject(it.data()));
return d;
}
const Py::List PythonExtension::toPyObject(const TQValueList<TQVariant>& list)
{
#ifdef KROSS_PYTHON_EXTENSION_TOPYOBJECT_DEBUG
krossdebug( TQString("Kross::Python::PythonExtension::toPyObject(TQValueList<TQVariant>)") );
#endif
Py::List l;
for(TQValueList<TQVariant>::ConstIterator it = list.constBegin(); it != list.constEnd(); ++it)
l.append(toPyObject(*it));
return l;
}
const Py::Object PythonExtension::toPyObject(const TQVariant& variant)
{
#ifdef KROSS_PYTHON_EXTENSION_TOPYOBJECT_DEBUG
krossdebug( TQString("Kross::Python::PythonExtension::toPyObject(TQVariant) typename='%1'").arg(variant.typeName()) );
#endif
switch(variant.type()) {
case TQVariant::Invalid:
return Py::None();
case TQVariant::Bool:
return Py::Int(variant.toBool());
case TQVariant::Int:
return Py::Int(variant.toInt());
case TQVariant::UInt:
return Py::Long((unsigned long)variant.toUInt());
case TQVariant::Double:
return Py::Float(variant.toDouble());
case TQVariant::Date:
case TQVariant::Time:
case TQVariant::DateTime:
case TQVariant::ByteArray:
case TQVariant::BitArray:
case TQVariant::CString:
case TQVariant::String:
return toPyObject(variant.toString());
case TQVariant::StringList:
return toPyObject(variant.toStringList());
case TQVariant::Map:
return toPyObject(variant.toMap());
case TQVariant::List:
return toPyObject(variant.toList());
// To handle following both cases is a bit difficult
// cause Python doesn't spend an easy possibility
// for such large numbers (TODO maybe BigInt?). So,
// we risk overflows here, but well...
case TQVariant::LongLong: {
TQ_LLONG l = variant.toLongLong();
//return (l < 0) ? Py::Long((long)l) : Py::Long((unsigned long)l);
return Py::Long((long)l);
//return Py::Long(PyLong_FromLong( (long)l ), true);
} break;
case TQVariant::ULongLong: {
return Py::Long((unsigned long)variant.toULongLong());
} break;
default: {
krosswarning( TQString("Kross::Python::PythonExtension::toPyObject(TQVariant) Not possible to convert the TQVariant type '%1' to a Py::Object.").arg(variant.typeName()) );
return Py::None();
}
}
}
const Py::Object PythonExtension::toPyObject(Kross::Api::Object::Ptr object)
{
if(! object) {
#ifdef KROSS_PYTHON_EXTENSION_TOPYOBJECT_DEBUG
krossdebug("Kross::Python::PythonExtension::toPyObject(Kross::Api::Object) is NULL => Py::None");
#endif
return Py::None();
}
const TQString classname = object->getClassName();
if(classname == "Kross::Api::Variant") {
TQVariant v = static_cast<Kross::Api::Variant*>( object.data() )->getValue();
#ifdef KROSS_PYTHON_EXTENSION_TOPYOBJECT_DEBUG
krossdebug( TQString("Kross::Python::PythonExtension::toPyObject(Kross::Api::Object) is Kross::Api::Variant %1").arg(v.toString()) );
#endif
return toPyObject(v);
}
if(classname == "Kross::Api::List") {
#ifdef KROSS_PYTHON_EXTENSION_TOPYOBJECT_DEBUG
krossdebug("Kross::Python::PythonExtension::toPyObject(Kross::Api::Object) is Kross::Api::List");
#endif
Py::List pylist;
Kross::Api::List* list = static_cast<Kross::Api::List*>( object.data() );
TQValueList<Kross::Api::Object::Ptr> valuelist = list->getValue();
for(TQValueList<Kross::Api::Object::Ptr>::Iterator it = valuelist.begin(); it != valuelist.end(); ++it)
pylist.append( toPyObject(*it) ); // recursive
return pylist;
}
if(classname == "Kross::Api::Dict") {
#ifdef KROSS_PYTHON_EXTENSION_TOPYOBJECT_DEBUG
krossdebug("Kross::Python::PythonExtension::toPyObject(Kross::Api::Object) is Kross::Api::Dict");
#endif
Py::Dict pydict;
Kross::Api::Dict* dict = static_cast<Kross::Api::Dict*>( object.data() );
TQMap<TQString, Kross::Api::Object::Ptr> valuedict = dict->getValue();
for(TQMap<TQString, Kross::Api::Object::Ptr>::Iterator it = valuedict.begin(); it != valuedict.end(); ++it) {
const char* n = it.key().latin1();
pydict[ n ] = toPyObject( it.data() ); // recursive
}
return pydict;
}
#ifdef KROSS_PYTHON_EXTENSION_TOPYOBJECT_DEBUG
krossdebug( TQString("Trying to handle PythonExtension::toPyObject(%1) as PythonExtension").arg(object->getClassName()) );
#endif
return Py::asObject( new PythonExtension(object) );
}
const Py::Tuple PythonExtension::toPyTuple(Kross::Api::List::Ptr list)
{
#ifdef KROSS_PYTHON_EXTENSION_TOPYOBJECT_DEBUG
krossdebug( TQString("Kross::Python::PythonExtension::toPyTuple(Kross::Api::List) name='%1'").arg(list ? list->getName() : "NULL") );
#endif
uint count = list ? list->count() : 0;
Py::Tuple tuple(count);
for(uint i = 0; i < count; i++)
tuple.setItem(i, toPyObject(list->item(i)));
return tuple;
}
PyObject* PythonExtension::proxyhandler(PyObject *_self_and_name_tuple, PyObject *args)
{
Py::Tuple tuple(_self_and_name_tuple);
PythonExtension *self = static_cast<PythonExtension*>( tuple[0].ptr() );
TQString methodname = Py::String(tuple[1]).as_string().c_str();
try {
Kross::Api::List::Ptr arguments = toObject( Py::Tuple(args) );
#ifdef KROSS_PYTHON_EXTENSION_CALL_DEBUG
krossdebug( TQString("Kross::Python::PythonExtension::proxyhandler methodname='%1' arguments='%2'").arg(methodname).arg(arguments->toString()) );
#endif
Kross::Api::Callable* callable = dynamic_cast<Kross::Api::Callable*>(self->m_object.data());
if(callable && callable->hasChild(methodname)) {
#ifdef KROSS_PYTHON_EXTENSION_CALL_DEBUG
krossdebug( TQString("Kross::Python::PythonExtension::proxyhandler methodname='%1' is a child object of '%2'.").arg(methodname).arg(self->m_object->getName()) );
#endif
Py::Object result = toPyObject( callable->getChild(methodname)->call(TQString(), arguments) );
result.increment_reference_count();
return result.ptr();
}
#ifdef KROSS_PYTHON_EXTENSION_CALL_DEBUG
krossdebug( TQString("Kross::Python::PythonExtension::proxyhandler try to call function with methodname '%1' in object '%2'.").arg(methodname).arg(self->m_object->getName()) );
#endif
Py::Object result = toPyObject( self->m_object->call(methodname, arguments) );
result.increment_reference_count();
return result.ptr();
}
catch(Py::Exception& e) {
const TQString err = Py::value(e).as_string().c_str();
krosswarning( TQString("Py::Exception in Kross::Python::PythonExtension::proxyhandler %1").arg(err) );
//throw e;
}
catch(Kross::Api::Exception::Ptr e) {
const TQString err = e->toString();
krosswarning( TQString("Kross::Api::Exception in Kross::Python::PythonExtension::proxyhandler %1").arg(err) );
// Don't throw here cause it will end in a crash deep in python. The
// error is already handled anyway.
//throw Py::Exception( (char*) e->toString().latin1() );
}
return Py_None;
}
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