src/python.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #include "python.hh"
   4 #include "openbox.hh"
   5 #include "otk/display.hh"
   6
   7 #include <vector>
   8 #include <algorithm>
   9
  10 namespace ob {
  11
  12 typedef std::vector<PyObject*> FunctionList;
  13
  14 static FunctionList callbacks[OBActions::NUM_ACTIONS];
  15 static FunctionList bindfuncs;
  16
  17 bool python_register(int action, PyObject *callback)
  18 {
  19   if (action < 0 || action >= OBActions::NUM_ACTIONS ||
  20       action == OBActions::Action_KeyPress) {
  21     PyErr_SetString(PyExc_AssertionError, "Invalid action type.");
  22     return false;
  23   }
  24   if (!PyCallable_Check(callback)) {
  25     PyErr_SetString(PyExc_AssertionError, "Invalid callback function.");
  26     return false;
  27   }
  28
  29   FunctionList::iterator it = std::find(callbacks[action].begin(),
  30                                         callbacks[action].end(),
  31                                         callback);
  32   if (it == callbacks[action].end()) { // not already in there
  33     Py_XINCREF(callback);              // Add a reference to new callback
  34     callbacks[action].push_back(callback);
  35   }
  36   return true;
  37 }
  38
  39 bool python_preregister(int action, PyObject *callback)
  40 {
  41   if (action < 0 || action >= OBActions::NUM_ACTIONS ||
  42       action == OBActions::Action_KeyPress) {
  43     PyErr_SetString(PyExc_AssertionError, "Invalid action type.");
  44     return false;
  45   }
  46   if (!PyCallable_Check(callback)) {
  47     PyErr_SetString(PyExc_AssertionError, "Invalid callback function.");
  48     return false;
  49   }
  50
  51   FunctionList::iterator it = std::find(callbacks[action].begin(),
  52                                         callbacks[action].end(),
  53                                         callback);
  54   if (it == callbacks[action].end()) { // not already in there
  55     Py_XINCREF(callback);              // Add a reference to new callback
  56     callbacks[action].insert(callbacks[action].begin(), callback);
  57   }
  58   return true;
  59 }
  60
  61 bool python_unregister(int action, PyObject *callback)
  62 {
  63   if (action < 0 || action >= OBActions::NUM_ACTIONS ||
  64       action == OBActions::Action_KeyPress) {
  65     PyErr_SetString(PyExc_AssertionError, "Invalid action type.");
  66     return false;
  67   }
  68   if (!PyCallable_Check(callback)) {
  69     PyErr_SetString(PyExc_AssertionError, "Invalid callback function.");
  70     return false;
  71   }
  72
  73   FunctionList::iterator it = std::find(callbacks[action].begin(),
  74                                         callbacks[action].end(),
  75                                         callback);
  76   if (it != callbacks[action].end()) { // its been registered before
  77     Py_XDECREF(*it);                   // Dispose of previous callback
  78     callbacks[action].erase(it);
  79   }
  80   return true;
  81 }
  82
  83 bool python_unregister_all(int action)
  84 {
  85   if (action < 0 || action >= OBActions::NUM_ACTIONS) {
  86     PyErr_SetString(PyExc_AssertionError, "Invalid action type.");
  87     return false;
  88   }
  89
  90   while (!callbacks[action].empty()) {
  91     Py_XDECREF(callbacks[action].back());
  92     callbacks[action].pop_back();
  93   }
  94   return true;
  95 }
  96
  97 void python_callback(OBActions::ActionType action, Window window,
  98                      OBWidget::WidgetType type, unsigned int state,
  99                      long d1, long d2, long d3, long d4)
 100 {
 101   PyObject *arglist;
 102   PyObject *result;
 103
 104   assert(action >= 0 && action < OBActions::NUM_ACTIONS);
 105
 106   if (d4 != LONG_MIN)
 107     arglist = Py_BuildValue("iliillll", action, window, type, state,
 108                             d1, d2, d3, d4);
 109   else if (d3 != LONG_MIN)
 110     arglist = Py_BuildValue("iliilll", action, window, type, state,
 111                             d1, d2, d3);
 112   else if (d2 != LONG_MIN)
 113     arglist = Py_BuildValue("iliill", action, window, type, state, d1, d2);
 114   else if (d1 != LONG_MIN)
 115     arglist = Py_BuildValue("iliil", action, window, type, state, d1);
 116   else
 117     arglist = Py_BuildValue("ilii", action, window, type, state);
 118
 119   FunctionList::iterator it, end = callbacks[action].end();
 120   for (it = callbacks[action].begin(); it != end; ++it) {
 121     // call the callback
 122     result = PyEval_CallObject(*it, arglist);
 123     if (result) {
 124       Py_DECREF(result);
 125     } else {
 126       // an exception occured in the script, display it
 127       PyErr_Print();
 128     }
 129   }
 130
 131   Py_DECREF(arglist);
 132 }
 133
 134
 135
 136
 137
 138
 139 bool python_bind(PyObject *keylist, PyObject *callback)
 140 {
 141   if (!PyList_Check(keylist)) {
 142     PyErr_SetString(PyExc_AssertionError, "Invalid keylist. Not a list.");
 143     return false;
 144   }
 145   if (!PyCallable_Check(callback)) {
 146     PyErr_SetString(PyExc_AssertionError, "Invalid callback function.");
 147     return false;
 148   }
 149
 150   OBBindings::StringVect vectkeylist;
 151   for (int i = 0, end = PyList_Size(keylist); i < end; ++i) {
 152     PyObject *str = PyList_GetItem(keylist, i);
 153     if (!PyString_Check(str)) {
 154       PyErr_SetString(PyExc_AssertionError,
 155                       "Invalid keylist. It must contain only strings.");
 156       return false;
 157     }
 158     vectkeylist.push_back(PyString_AsString(str));
 159   }
 160
 161   // the id is what the binding class can call back with so it doesnt have to
 162   // worry about the python function pointer
 163   int id = bindfuncs.size();
 164   if (Openbox::instance->bindings()->add(vectkeylist, id)) {
 165     Py_XINCREF(callback);              // Add a reference to new callback
 166     bindfuncs.push_back(callback);
 167     return true;
 168   } else {
 169     PyErr_SetString(PyExc_AssertionError,"Unable to create binding. Invalid.");
 170     return false;
 171   }
 172 }
 173
 174 bool python_unbind(PyObject *keylist)
 175 {
 176   if (!PyList_Check(keylist)) {
 177     PyErr_SetString(PyExc_AssertionError, "Invalid keylist. Not a list.");
 178     return false;
 179   }
 180
 181   OBBindings::StringVect vectkeylist;
 182   for (int i = 0, end = PyList_Size(keylist); i < end; ++i) {
 183     PyObject *str = PyList_GetItem(keylist, i);
 184     if (!PyString_Check(str)) {
 185       PyErr_SetString(PyExc_AssertionError,
 186                       "Invalid keylist. It must contain only strings.");
 187       return false;
 188     }
 189     vectkeylist.push_back(PyString_AsString(str));
 190   }
 191
 192   int id;
 193   if ((id =
 194        Openbox::instance->bindings()->remove(vectkeylist)) >= 0) {
 195     assert(bindfuncs[id]); // shouldn't be able to remove it twice
 196     Py_XDECREF(bindfuncs[id]);  // Dispose of previous callback
 197     // important note: we don't erase the item from the list cuz that would
 198     // ruin all the id's that are in use. simply nullify it.
 199     bindfuncs[id] = 0;
 200     return true;
 201   }
 202
 203   return false;
 204 }
 205
 206 void python_set_reset_key(const std::string &key)
 207 {
 208   Openbox::instance->bindings()->setResetKey(key);
 209 }
 210
 211 void python_unbind_all()
 212 {
 213   Openbox::instance->bindings()->remove_all();
 214 }
 215
 216
 217 void python_callback_binding(int id, Window window, unsigned int state,
 218                              unsigned int keybutton, Time time)
 219 {
 220   if (!bindfuncs[id]) return; // the key was unbound
 221
 222   PyObject *arglist;
 223   PyObject *result;
 224
 225   arglist = Py_BuildValue("lisl", window, state,
 226                           XKeysymToString(
 227                             XKeycodeToKeysym(otk::OBDisplay::display,
 228                                              keybutton, 0)),
 229                           time);
 230
 231   // call the callback
 232   result = PyEval_CallObject(bindfuncs[id], arglist);
 233   if (result) {
 234     Py_DECREF(result);
 235   } else {
 236     // an exception occured in the script, display it
 237     PyErr_Print();
 238   }
 239
 240   Py_DECREF(arglist);
 241 }
 242
 243 }