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// -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
#include "python.hh"
#include <vector>
#include <algorithm>
namespace ob {
typedef std::vector<PyObject*> FunctionList;
static FunctionList callbacks[OBActions::NUM_ACTIONS];
bool python_register(int action, PyObject *callback)
{
if (action < 0 || action >= OBActions::NUM_ACTIONS) {
PyErr_SetString(PyExc_AssertionError, "Invalid action type.");
return false;
}
if (!PyCallable_Check(callback)) {
PyErr_SetString(PyExc_AssertionError, "Invalid callback function.");
return false;
}
FunctionList::iterator it = std::find(callbacks[action].begin(),
callbacks[action].end(),
callback);
if (it == callbacks[action].end()) { // not already in there
Py_XINCREF(callback); // Add a reference to new callback
callbacks[action].push_back(callback);
}
return true;
}
bool python_unregister(int action, PyObject *callback)
{
if (action < 0 || action >= OBActions::NUM_ACTIONS) {
PyErr_SetString(PyExc_AssertionError, "Invalid action type.");
return false;
}
if (!PyCallable_Check(callback)) {
PyErr_SetString(PyExc_AssertionError, "Invalid callback function.");
return false;
}
FunctionList::iterator it = std::find(callbacks[action].begin(),
callbacks[action].end(),
callback);
if (it != callbacks[action].end()) { // its been registered before
Py_XDECREF(*it); // Dispose of previous callback
callbacks[action].erase(it);
}
return true;
}
void python_callback(OBActions::ActionType action, Window window,
OBWidget::WidgetType type, unsigned int state,
long d1, long d2, long d3, long d4)
{
PyObject *arglist;
PyObject *result;
assert(action >= 0 && action < OBActions::NUM_ACTIONS);
if (d4 != LONG_MIN)
arglist = Py_BuildValue("iliillll", action, window, type, state,
d1, d2, d3, d4);
else if (d3 != LONG_MIN)
arglist = Py_BuildValue("iliilll", action, window, type, state,
d1, d2, d3);
else if (d2 != LONG_MIN)
arglist = Py_BuildValue("iliill", action, window, type, state, d1, d2);
else if (d1 != LONG_MIN)
arglist = Py_BuildValue("iliil", action, window, type, state, d1);
else
arglist = Py_BuildValue("ilii", action, window, type, state);
FunctionList::iterator it, end = callbacks[action].end();
for (it = callbacks[action].begin(); it != end; ++it) {
// call the callback
result = PyEval_CallObject(*it, arglist);
if (result) {
Py_DECREF(result);
} else {
// an exception occured in the script, display it
PyErr_Print();
}
}
Py_DECREF(arglist);
}
}
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