Dogcows Code - chaz/openbox/blob - 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 extern "C" {
  11 #include <Python.h>
  12
  13 // The initializer in openbox_wrap.cc
  14 extern void init_openbox(void);
  15 // The initializer in otk_wrap.cc
  16 extern void init_otk(void);
  17 }
  18
  19 namespace ob {
  20
  21 typedef std::vector<PyObject*> FunctionList;
  22
  23 static FunctionList callbacks[OBActions::NUM_ACTIONS];
  24 static FunctionList bindfuncs;
  25
  26 static PyObject *obdict;
  27
  28 void python_init(char *argv0)
  29 {
  30   Py_SetProgramName(argv0);
  31   Py_Initialize();
  32   init_otk();
  33   init_openbox();
  34   PyRun_SimpleString("from _otk import *; from _openbox import *;");
  35
  36   // set up access to the python global variables
  37   PyObject *obmodule = PyImport_AddModule("__main__");
  38   obdict = PyModule_GetDict(obmodule);
  39 }
  40
  41 bool python_exec(const char *file) {
  42   FILE *rcpyfd = fopen(file, "r");
  43   if (!rcpyfd) {
  44     printf("failed to load python file %s\n", file);
  45     return false;
  46   }
  47   PyRun_SimpleFile(rcpyfd, const_cast<char*>(file));
  48   fclose(rcpyfd);
  49   return true;
  50 }
  51
  52 bool python_get_string(const char *name, std::string *value)
  53 {
  54   PyObject *val = PyDict_GetItemString(obdict, const_cast<char*>(name));
  55   if (!val) return false;
  56
  57   *value = PyString_AsString(val);
  58   return true;
  59 }
  60
  61
  62 bool python_register(int action, PyObject *callback)
  63 {
  64   if (action < 0 || action >= OBActions::NUM_ACTIONS ||
  65       action == OBActions::Action_KeyPress) {
  66     PyErr_SetString(PyExc_AssertionError, "Invalid action type.");
  67     return false;
  68   }
  69   if (!PyCallable_Check(callback)) {
  70     PyErr_SetString(PyExc_AssertionError, "Invalid callback function.");
  71     return false;
  72   }
  73
  74   FunctionList::iterator it = std::find(callbacks[action].begin(),
  75                                         callbacks[action].end(),
  76                                         callback);
  77   if (it == callbacks[action].end()) { // not already in there
  78     Py_XINCREF(callback);              // Add a reference to new callback
  79     callbacks[action].push_back(callback);
  80   }
  81   return true;
  82 }
  83
  84 bool python_preregister(int action, PyObject *callback)
  85 {
  86   if (action < 0 || action >= OBActions::NUM_ACTIONS ||
  87       action == OBActions::Action_KeyPress) {
  88     PyErr_SetString(PyExc_AssertionError, "Invalid action type.");
  89     return false;
  90   }
  91   if (!PyCallable_Check(callback)) {
  92     PyErr_SetString(PyExc_AssertionError, "Invalid callback function.");
  93     return false;
  94   }
  95
  96   FunctionList::iterator it = std::find(callbacks[action].begin(),
  97                                         callbacks[action].end(),
  98                                         callback);
  99   if (it == callbacks[action].end()) { // not already in there
 100     Py_XINCREF(callback);              // Add a reference to new callback
 101     callbacks[action].insert(callbacks[action].begin(), callback);
 102   }
 103   return true;
 104 }
 105
 106 bool python_unregister(int action, PyObject *callback)
 107 {
 108   if (action < 0 || action >= OBActions::NUM_ACTIONS ||
 109       action == OBActions::Action_KeyPress) {
 110     PyErr_SetString(PyExc_AssertionError, "Invalid action type.");
 111     return false;
 112   }
 113   if (!PyCallable_Check(callback)) {
 114     PyErr_SetString(PyExc_AssertionError, "Invalid callback function.");
 115     return false;
 116   }
 117
 118   FunctionList::iterator it = std::find(callbacks[action].begin(),
 119                                         callbacks[action].end(),
 120                                         callback);
 121   if (it != callbacks[action].end()) { // its been registered before
 122     Py_XDECREF(*it);                   // Dispose of previous callback
 123     callbacks[action].erase(it);
 124   }
 125   return true;
 126 }
 127
 128 bool python_unregister_all(int action)
 129 {
 130   if (action < 0 || action >= OBActions::NUM_ACTIONS) {
 131     PyErr_SetString(PyExc_AssertionError, "Invalid action type.");
 132     return false;
 133   }
 134
 135   while (!callbacks[action].empty()) {
 136     Py_XDECREF(callbacks[action].back());
 137     callbacks[action].pop_back();
 138   }
 139   return true;
 140 }
 141
 142 void python_callback(OBActions::ActionType action, Window window,
 143                      OBWidget::WidgetType type, unsigned int state,
 144                      long d1, long d2, long d3, long d4)
 145 {
 146   PyObject *arglist;
 147   PyObject *result;
 148
 149   assert(action >= 0 && action < OBActions::NUM_ACTIONS);
 150
 151   if (d4 != LONG_MIN)
 152     arglist = Py_BuildValue("iliillll", action, window, type, state,
 153                             d1, d2, d3, d4);
 154   else if (d3 != LONG_MIN)
 155     arglist = Py_BuildValue("iliilll", action, window, type, state,
 156                             d1, d2, d3);
 157   else if (d2 != LONG_MIN)
 158     arglist = Py_BuildValue("iliill", action, window, type, state, d1, d2);
 159   else if (d1 != LONG_MIN)
 160     arglist = Py_BuildValue("iliil", action, window, type, state, d1);
 161   else
 162     arglist = Py_BuildValue("ilii", action, window, type, state);
 163
 164   FunctionList::iterator it, end = callbacks[action].end();
 165   for (it = callbacks[action].begin(); it != end; ++it) {
 166     // call the callback
 167     result = PyEval_CallObject(*it, arglist);
 168     if (result) {
 169       Py_DECREF(result);
 170     } else {
 171       // an exception occured in the script, display it
 172       PyErr_Print();
 173     }
 174   }
 175
 176   Py_DECREF(arglist);
 177 }
 178
 179
 180
 181
 182
 183
 184 bool python_bind(PyObject *keylist, PyObject *callback)
 185 {
 186   if (!PyList_Check(keylist)) {
 187     PyErr_SetString(PyExc_AssertionError, "Invalid keylist. Not a list.");
 188     return false;
 189   }
 190   if (!PyCallable_Check(callback)) {
 191     PyErr_SetString(PyExc_AssertionError, "Invalid callback function.");
 192     return false;
 193   }
 194
 195   OBBindings::StringVect vectkeylist;
 196   for (int i = 0, end = PyList_Size(keylist); i < end; ++i) {
 197     PyObject *str = PyList_GetItem(keylist, i);
 198     if (!PyString_Check(str)) {
 199       PyErr_SetString(PyExc_AssertionError,
 200                       "Invalid keylist. It must contain only strings.");
 201       return false;
 202     }
 203     vectkeylist.push_back(PyString_AsString(str));
 204   }
 205
 206   // the id is what the binding class can call back with so it doesnt have to
 207   // worry about the python function pointer
 208   int id = bindfuncs.size();
 209   if (Openbox::instance->bindings()->add(vectkeylist, id)) {
 210     Py_XINCREF(callback);              // Add a reference to new callback
 211     bindfuncs.push_back(callback);
 212     return true;
 213   } else {
 214     PyErr_SetString(PyExc_AssertionError,"Unable to create binding. Invalid.");
 215     return false;
 216   }
 217 }
 218
 219 bool python_unbind(PyObject *keylist)
 220 {
 221   if (!PyList_Check(keylist)) {
 222     PyErr_SetString(PyExc_AssertionError, "Invalid keylist. Not a list.");
 223     return false;
 224   }
 225
 226   OBBindings::StringVect vectkeylist;
 227   for (int i = 0, end = PyList_Size(keylist); i < end; ++i) {
 228     PyObject *str = PyList_GetItem(keylist, i);
 229     if (!PyString_Check(str)) {
 230       PyErr_SetString(PyExc_AssertionError,
 231                       "Invalid keylist. It must contain only strings.");
 232       return false;
 233     }
 234     vectkeylist.push_back(PyString_AsString(str));
 235   }
 236
 237   int id;
 238   if ((id =
 239        Openbox::instance->bindings()->remove(vectkeylist)) >= 0) {
 240     assert(bindfuncs[id]); // shouldn't be able to remove it twice
 241     Py_XDECREF(bindfuncs[id]);  // Dispose of previous callback
 242     // important note: we don't erase the item from the list cuz that would
 243     // ruin all the id's that are in use. simply nullify it.
 244     bindfuncs[id] = 0;
 245     return true;
 246   }
 247
 248   return false;
 249 }
 250
 251 void python_set_reset_key(const std::string &key)
 252 {
 253   Openbox::instance->bindings()->setResetKey(key);
 254 }
 255
 256 void python_unbind_all()
 257 {
 258   Openbox::instance->bindings()->remove_all();
 259 }
 260
 261
 262 void python_callback_binding(int id, Window window, unsigned int state,
 263                              unsigned int keybutton, Time time)
 264 {
 265   if (!bindfuncs[id]) return; // the key was unbound
 266
 267   PyObject *arglist;
 268   PyObject *result;
 269
 270   arglist = Py_BuildValue("lisl", window, state,
 271                           XKeysymToString(
 272                             XKeycodeToKeysym(otk::OBDisplay::display,
 273                                              keybutton, 0)),
 274                           time);
 275
 276   // call the callback
 277   result = PyEval_CallObject(bindfuncs[id], arglist);
 278   if (result) {
 279     Py_DECREF(result);
 280   } else {
 281     // an exception occured in the script, display it
 282     PyErr_Print();
 283   }
 284
 285   Py_DECREF(arglist);
 286 }
 287
 288 }