Dogcows Code - chaz/openbox/blob - src/bindings.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #ifdef HAVE_CONFIG_H
   4 # include "../config.h"
   5 #endif
   6
   7 #include "bindings.hh"
   8 #include "screen.hh"
   9 #include "openbox.hh"
  10 #include "client.hh"
  11 #include "frame.hh"
  12 #include "python.hh"
  13 #include "otk/display.hh"
  14
  15 extern "C" {
  16 #include <X11/Xlib.h>
  17
  18 #include "gettext.h"
  19 #define _(str) gettext(str)
  20 }
  21
  22 #include <algorithm>
  23
  24 namespace ob {
  25
  26 static bool buttonvalue(const std::string &button, unsigned int *val)
  27 {
  28   if (button == "Left" || button == "1" || button == "Button1") {
  29     *val |= Button1;
  30   } else if (button == "Middle" || button == "2" || button == "Button2") {
  31     *val |= Button2;
  32   } else if (button == "Right" || button == "3" || button == "Button3") {
  33     *val |= Button3;
  34   } else if (button == "Up" || button == "4" || button == "Button4") {
  35     *val |= Button4;
  36   } else if (button == "Down" || button == "5" || button == "Button5") {
  37     *val |= Button5;
  38   } else
  39     return false;
  40   return true;
  41 }
  42
  43 static bool modvalue(const std::string &mod, unsigned int *val)
  44 {
  45   if (mod == "C") {           // control
  46     *val |= ControlMask;
  47   } else if (mod == "S") {    // shift
  48     *val |= ShiftMask;
  49   } else if (mod == "A" ||    // alt/mod1
  50              mod == "M" ||
  51              mod == "Mod1" ||
  52              mod == "M1") {
  53     *val |= Mod1Mask;
  54   } else if (mod == "Mod2" ||   // mod2
  55              mod == "M2") {
  56     *val |= Mod2Mask;
  57   } else if (mod == "Mod3" ||   // mod3
  58              mod == "M3") {
  59     *val |= Mod3Mask;
  60   } else if (mod == "W" ||    // windows/mod4
  61              mod == "Mod4" ||
  62              mod == "M4") {
  63     *val |= Mod4Mask;
  64   } else if (mod == "Mod5" ||   // mod5
  65              mod == "M5") {
  66     *val |= Mod5Mask;
  67   } else {                    // invalid
  68     return false;
  69   }
  70   return true;
  71 }
  72
  73 bool Bindings::translate(const std::string &str, Binding &b,bool askey) const
  74 {
  75   // parse out the base key name
  76   std::string::size_type keybegin = str.find_last_of('-');
  77   keybegin = (keybegin == std::string::npos) ? 0 : keybegin + 1;
  78   std::string key(str, keybegin);
  79
  80   // parse out the requested modifier keys
  81   unsigned int modval = 0;
  82   std::string::size_type begin = 0, end;
  83   while (begin != keybegin) {
  84     end = str.find_first_of('-', begin);
  85
  86     std::string mod(str, begin, end-begin);
  87     if (!modvalue(mod, &modval)) {
  88       printf(_("Invalid modifier element in key binding: %s\n"), mod.c_str());
  89       return false;
  90     }
  91
  92     begin = end + 1;
  93   }
  94
  95   // set the binding
  96   b.modifiers = modval;
  97   if (askey) {
  98     KeySym sym = XStringToKeysym(const_cast<char *>(key.c_str()));
  99     if (sym == NoSymbol) {
 100       printf(_("Invalid Key name in key binding: %s\n"), key.c_str());
 101       return false;
 102     }
 103     if (!(b.key = XKeysymToKeycode(**otk::display, sym)))
 104       printf(_("No valid keycode for Key in key binding: %s\n"), key.c_str());
 105     return b.key != 0;
 106   } else {
 107     return buttonvalue(key, &b.key);
 108   }
 109 }
 110
 111 static void destroytree(KeyBindingTree *tree)
 112 {
 113   while (tree) {
 114     KeyBindingTree *c = tree->first_child;
 115     delete tree;
 116     tree = c;
 117   }
 118 }
 119
 120 KeyBindingTree *Bindings::buildtree(const StringVect &keylist,
 121                                       PyObject *callback) const
 122 {
 123   if (keylist.empty()) return 0; // nothing in the list.. return 0
 124
 125   KeyBindingTree *ret = 0, *p;
 126
 127   StringVect::const_reverse_iterator it, end = keylist.rend();
 128   for (it = keylist.rbegin(); it != end; ++it) {
 129     p = ret;
 130     ret = new KeyBindingTree();
 131     if (!p) {
 132       // this is the first built node, the bottom node of the tree
 133       ret->chain = false;
 134       ret->callbacks.push_back(callback);
 135     }
 136     ret->first_child = p;
 137     if (!translate(*it, ret->binding)) {
 138       destroytree(ret);
 139       ret = 0;
 140       break;
 141     }
 142   }
 143   return ret;
 144 }
 145
 146
 147 Bindings::Bindings()
 148   : _curpos(&_keytree),
 149     _resetkey(0,0),
 150     _timer((otk::Timer *) 0),
 151     _keybgrab_callback(0)
 152 {
 153 //  setResetKey("C-g"); // set the default reset key
 154 }
 155
 156
 157 Bindings::~Bindings()
 158 {
 159   if (_timer)
 160     delete _timer;
 161
 162   removeAllKeys();
 163   //removeAllButtons(); // this is done by each client as they are unmanaged
 164   removeAllEvents();
 165 }
 166
 167
 168 void Bindings::assimilate(KeyBindingTree *node)
 169 {
 170   KeyBindingTree *a, *b, *tmp, *last;
 171
 172   if (!_keytree.first_child) {
 173     // there are no nodes at this level yet
 174     _keytree.first_child = node;
 175   } else {
 176     a = _keytree.first_child;
 177     last = a;
 178     b = node;
 179     while (a) {
 180       last = a;
 181       if (a->binding != b->binding) {
 182         a = a->next_sibling;
 183       } else {
 184         tmp = b;
 185         b = b->first_child;
 186         delete tmp;
 187         a = a->first_child;
 188       }
 189     }
 190     if (last->binding != b->binding)
 191       last->next_sibling = b;
 192     else {
 193       last->first_child = b->first_child;
 194       delete b;
 195     }
 196   }
 197 }
 198
 199
 200 KeyBindingTree *Bindings::find(KeyBindingTree *search,
 201                                  bool *conflict) const {
 202   *conflict = false;
 203   KeyBindingTree *a, *b;
 204   a = _keytree.first_child;
 205   b = search;
 206   while (a && b) {
 207     if (a->binding != b->binding) {
 208       a = a->next_sibling;
 209     } else {
 210       if (a->chain == b->chain) {
 211         if (!a->chain) {
 212           // found it! (return the actual id, not the search's)
 213           return a;
 214         }
 215       } else {
 216         *conflict = true;
 217         return 0; // the chain status' don't match (conflict!)
 218       }
 219       b = b->first_child;
 220       a = a->first_child;
 221     }
 222   }
 223   return 0; // it just isn't in here
 224 }
 225
 226
 227 bool Bindings::addKey(const StringVect &keylist, PyObject *callback)
 228 {
 229   KeyBindingTree *tree, *t;
 230   bool conflict;
 231
 232   if (!(tree = buildtree(keylist, callback)))
 233     return false; // invalid binding requested
 234
 235   t = find(tree, &conflict);
 236   if (conflict) {
 237     // conflicts with another binding
 238     destroytree(tree);
 239     return false;
 240   }
 241
 242   if (t) {
 243     // already bound to something
 244     t->callbacks.push_back(callback);
 245     destroytree(tree);
 246   } else {
 247     // grab the server here to make sure no key pressed go missed
 248     otk::display->grab();
 249     grabKeys(false);
 250
 251     // assimilate this built tree into the main tree
 252     assimilate(tree); // assimilation destroys/uses the tree
 253
 254     grabKeys(true);
 255     otk::display->ungrab();
 256   }
 257
 258   Py_INCREF(callback);
 259
 260   return true;
 261 }
 262
 263 /*
 264 bool Bindings::removeKey(const StringVect &keylist, PyObject *callback)
 265 {
 266   assert(false); // XXX: function not implemented yet
 267
 268   KeyBindingTree *tree;
 269   bool conflict;
 270
 271   if (!(tree = buildtree(keylist, 0)))
 272     return false; // invalid binding requested
 273
 274   KeyBindingTree *t = find(tree, &conflict);
 275   if (t) {
 276     CallbackList::iterator it = std::find(t->callbacks.begin(),
 277                                           t->callbacks.end(),
 278                                           callback);
 279     if (it != t->callbacks.end()) {
 280       // grab the server here to make sure no key pressed go missed
 281       otk::display->grab();
 282       grabKeys(false);
 283
 284       _curpos = &_keytree;
 285
 286       // XXX do shit here ...
 287       Py_XDECREF(*it);
 288
 289       grabKeys(true);
 290       otk::display->ungrab();
 291
 292       return true;
 293     }
 294   }
 295   return false;
 296 }
 297 */
 298
 299 void Bindings::setResetKey(const std::string &key)
 300 {
 301   Binding b(0, 0);
 302   if (translate(key, b)) {
 303     // grab the server here to make sure no key pressed go missed
 304     otk::display->grab();
 305     grabKeys(false);
 306     _resetkey.key = b.key;
 307     _resetkey.modifiers = b.modifiers;
 308     grabKeys(true);
 309     otk::display->ungrab();
 310   }
 311 }
 312
 313
 314 static void remove_branch(KeyBindingTree *first)
 315 {
 316   KeyBindingTree *p = first;
 317
 318   while (p) {
 319     if (p->first_child)
 320       remove_branch(p->first_child);
 321     KeyBindingTree *s = p->next_sibling;
 322     while(!p->callbacks.empty()) {
 323       Py_XDECREF(p->callbacks.front());
 324       p->callbacks.pop_front();
 325     }
 326     delete p;
 327     p = s;
 328   }
 329 }
 330
 331
 332 void Bindings::removeAllKeys()
 333 {
 334   grabKeys(false);
 335   if (_keytree.first_child) {
 336     remove_branch(_keytree.first_child);
 337     _keytree.first_child = 0;
 338   }
 339   grabKeys(true);
 340 }
 341
 342
 343 void Bindings::grabKeys(bool grab)
 344 {
 345   for (int i = 0; i < ScreenCount(**otk::display); ++i) {
 346     Screen *sc = openbox->screen(i);
 347     if (!sc) continue; // not a managed screen
 348     Window root = otk::display->screenInfo(i)->rootWindow();
 349
 350     KeyBindingTree *p = _curpos->first_child;
 351     while (p) {
 352       if (grab) {
 353         otk::display->grabKey(p->binding.key, p->binding.modifiers,
 354                                 root, false, GrabModeAsync, GrabModeAsync,
 355                                 false);
 356       }
 357       else
 358         otk::display->ungrabKey(p->binding.key, p->binding.modifiers,
 359                                   root);
 360       p = p->next_sibling;
 361     }
 362
 363     if (_resetkey.key)
 364       if (grab)
 365         otk::display->grabKey(_resetkey.key, _resetkey.modifiers,
 366                                 root, false, GrabModeAsync, GrabModeAsync,
 367                                 false);
 368       else
 369         otk::display->ungrabKey(_resetkey.key, _resetkey.modifiers,
 370                                   root);
 371   }
 372 }
 373
 374
 375 bool Bindings::grabKeyboard(int screen, PyObject *callback)
 376 {
 377   assert(callback);
 378   if (_keybgrab_callback) return false; // already grabbed
 379
 380   if (!openbox->screen(screen))
 381     return false; // the screen is not managed
 382
 383   Window root = otk::display->screenInfo(screen)->rootWindow();
 384   if (XGrabKeyboard(**otk::display, root, false, GrabModeAsync,
 385                     GrabModeAsync, CurrentTime))
 386     return false;
 387   _keybgrab_callback = callback;
 388   return true;
 389 }
 390
 391
 392 void Bindings::ungrabKeyboard()
 393 {
 394   if (!_keybgrab_callback) return; // not grabbed
 395
 396   _keybgrab_callback = 0;
 397   XUngrabKeyboard(**otk::display, CurrentTime);
 398   XUngrabPointer(**otk::display, CurrentTime);
 399 }
 400
 401
 402 bool Bindings::grabPointer(int screen)
 403 {
 404   if (!openbox->screen(screen))
 405     return false; // the screen is not managed
 406
 407   Window root = otk::display->screenInfo(screen)->rootWindow();
 408   XGrabPointer(**otk::display, root, false, 0, GrabModeAsync,
 409                GrabModeAsync, None, None, CurrentTime);
 410   return true;
 411 }
 412
 413
 414 void Bindings::ungrabPointer()
 415 {
 416   XUngrabPointer(**otk::display, CurrentTime);
 417 }
 418
 419
 420 void Bindings::fireKey(int screen, unsigned int modifiers, unsigned int key,
 421                        Time time, KeyAction::KA action)
 422 {
 423   if (_keybgrab_callback) {
 424     Client *c = openbox->focusedClient();
 425     KeyData data(screen, c, time, modifiers, key, action);
 426     python_callback(_keybgrab_callback, &data);
 427   }
 428
 429   // KeyRelease events only occur during keyboard grabs
 430   if (action == KeyAction::Release) return;
 431
 432   if (key == _resetkey.key && modifiers == _resetkey.modifiers) {
 433     resetChains(this);
 434   } else {
 435     KeyBindingTree *p = _curpos->first_child;
 436     while (p) {
 437       if (p->binding.key == key && p->binding.modifiers == modifiers) {
 438         if (p->chain) {
 439           if (_timer)
 440             delete _timer;
 441           _timer = new otk::Timer(5000, // 5 second timeout
 442                                   (otk::Timer::TimeoutHandler)resetChains,
 443                                   this);
 444           // grab the server here to make sure no key presses get missed
 445           otk::display->grab();
 446           grabKeys(false);
 447           _curpos = p;
 448           grabKeys(true);
 449           otk::display->ungrab();
 450         } else {
 451           Client *c = openbox->focusedClient();
 452           KeyData data(screen, c, time, modifiers, key, action);
 453           CallbackList::iterator it, end = p->callbacks.end();
 454           for (it = p->callbacks.begin(); it != end; ++it)
 455             python_callback(*it, &data);
 456           resetChains(this);
 457         }
 458         break;
 459       }
 460       p = p->next_sibling;
 461     }
 462   }
 463 }
 464
 465 void Bindings::resetChains(Bindings *self)
 466 {
 467   if (self->_timer) {
 468     delete self->_timer;
 469     self->_timer = (otk::Timer *) 0;
 470   }
 471   // grab the server here to make sure no key pressed go missed
 472   otk::display->grab();
 473   self->grabKeys(false);
 474   self->_curpos = &self->_keytree;
 475   self->grabKeys(true);
 476   otk::display->ungrab();
 477 }
 478
 479
 480 bool Bindings::addButton(const std::string &but, MouseContext::MC context,
 481                            MouseAction::MA action, PyObject *callback)
 482 {
 483   assert(context >= 0 && context < MouseContext::NUM_MOUSE_CONTEXT);
 484   assert(action >= 0 && action < MouseAction::NUM_MOUSE_ACTION);
 485
 486   Binding b(0,0);
 487   if (!translate(but, b, false))
 488     return false;
 489
 490   ButtonBindingList::iterator it, end = _buttons[context].end();
 491
 492   // look for a duplicate binding
 493   for (it = _buttons[context].begin(); it != end; ++it)
 494     if ((*it)->binding.key == b.key &&
 495         (*it)->binding.modifiers == b.modifiers) {
 496       break;
 497     }
 498
 499   ButtonBinding *bind;
 500
 501   // the binding didnt exist yet, add it
 502   if (it == end) {
 503     bind = new ButtonBinding();
 504     bind->binding.key = b.key;
 505     bind->binding.modifiers = b.modifiers;
 506     _buttons[context].push_back(bind);
 507     // grab the button on all clients
 508     for (int sn = 0; sn < ScreenCount(**otk::display); ++sn) {
 509       Screen *s = openbox->screen(sn);
 510       if (!s) continue; // not managed
 511       Client::List::iterator c_it, c_end = s->clients.end();
 512       for (c_it = s->clients.begin(); c_it != c_end; ++c_it) {
 513         grabButton(true, bind->binding, context, *c_it);
 514       }
 515     }
 516   } else
 517     bind = *it;
 518   bind->callbacks[action].push_back(callback);
 519   Py_INCREF(callback);
 520   return true;
 521 }
 522
 523 void Bindings::removeAllButtons()
 524 {
 525   for (int i = 0; i < MouseContext::NUM_MOUSE_CONTEXT; ++i) {
 526     ButtonBindingList::iterator it, end = _buttons[i].end();
 527     for (it = _buttons[i].begin(); it != end; ++it) {
 528       for (int a = 0; a < MouseAction::NUM_MOUSE_ACTION; ++a) {
 529         while (!(*it)->callbacks[a].empty()) {
 530           Py_XDECREF((*it)->callbacks[a].front());
 531           (*it)->callbacks[a].pop_front();
 532         }
 533       }
 534       // ungrab the button on all clients
 535       for (int sn = 0; sn < ScreenCount(**otk::display); ++sn) {
 536         Screen *s = openbox->screen(sn);
 537         if (!s) continue; // not managed
 538         Client::List::iterator c_it, c_end = s->clients.end();
 539         for (c_it = s->clients.begin(); c_it != c_end; ++c_it) {
 540           grabButton(false, (*it)->binding, (MouseContext::MC)i, *c_it);
 541         }
 542       }
 543     }
 544   }
 545 }
 546
 547 void Bindings::grabButton(bool grab, const Binding &b,
 548                           MouseContext::MC context, Client *client)
 549 {
 550   Window win;
 551   int mode = GrabModeAsync;
 552   unsigned int mask;
 553   switch(context) {
 554   case MouseContext::Frame:
 555     win = client->frame->window();
 556     mask = ButtonPressMask | ButtonMotionMask | ButtonReleaseMask;
 557     break;
 558   case MouseContext::Window:
 559     win = client->frame->plate();
 560     mode = GrabModeSync; // this is handled in fireButton
 561     mask = ButtonPressMask; // can't catch more than this with Sync mode
 562                             // the release event is manufactured by the
 563                             // master buttonPressHandler
 564     break;
 565   default:
 566     // any other elements already get button events, don't grab on them
 567     return;
 568   }
 569   if (grab)
 570     otk::display->grabButton(b.key, b.modifiers, win, false, mask, mode,
 571                              GrabModeAsync, None, None, false);
 572   else
 573     otk::display->ungrabButton(b.key, b.modifiers, win);
 574 }
 575
 576 void Bindings::grabButtons(bool grab, Client *client)
 577 {
 578   for (int i = 0; i < MouseContext::NUM_MOUSE_CONTEXT; ++i) {
 579     ButtonBindingList::iterator it, end = _buttons[i].end();
 580     for (it = _buttons[i].begin(); it != end; ++it)
 581       grabButton(grab, (*it)->binding, (MouseContext::MC)i, client);
 582   }
 583 }
 584
 585 void Bindings::fireButton(MouseData *data)
 586 {
 587   if (data->context == MouseContext::Window) {
 588     // Replay the event, so it goes to the client
 589     XAllowEvents(**otk::display, ReplayPointer, data->time);
 590   }
 591
 592   ButtonBindingList::iterator it, end = _buttons[data->context].end();
 593   for (it = _buttons[data->context].begin(); it != end; ++it)
 594     if ((*it)->binding.key == data->button &&
 595         (*it)->binding.modifiers == data->state) {
 596       CallbackList::iterator c_it,c_end = (*it)->callbacks[data->action].end();
 597       for (c_it = (*it)->callbacks[data->action].begin();
 598            c_it != c_end; ++c_it)
 599         python_callback(*c_it, data);
 600     }
 601 }
 602
 603
 604 bool Bindings::addEvent(EventAction::EA action, PyObject *callback)
 605 {
 606   if (action < 0 || action >= EventAction::NUM_EVENTS) {
 607     return false;
 608   }
 609 #ifdef    XKB
 610   if (action == EventAction::Bell && _eventlist[action].empty())
 611     XkbSelectEvents(**otk::display, XkbUseCoreKbd,
 612                     XkbBellNotifyMask, XkbBellNotifyMask);
 613 #endif // XKB
 614   _eventlist[action].push_back(callback);
 615   Py_INCREF(callback);
 616   return true;
 617 }
 618
 619 bool Bindings::removeEvent(EventAction::EA action, PyObject *callback)
 620 {
 621   if (action < 0 || action >= EventAction::NUM_EVENTS) {
 622     return false;
 623   }
 624
 625   CallbackList::iterator it = std::find(_eventlist[action].begin(),
 626                                         _eventlist[action].end(),
 627                                         callback);
 628   if (it != _eventlist[action].end()) {
 629     Py_XDECREF(*it);
 630     _eventlist[action].erase(it);
 631 #ifdef    XKB
 632     if (action == EventAction::Bell && _eventlist[action].empty())
 633       XkbSelectEvents(**otk::display, XkbUseCoreKbd,
 634                       XkbBellNotifyMask, 0);
 635 #endif // XKB
 636     return true;
 637   }
 638   return false;
 639 }
 640
 641 void Bindings::removeAllEvents()
 642 {
 643   for (int i = 0; i < EventAction::NUM_EVENTS; ++i) {
 644     while (!_eventlist[i].empty()) {
 645       Py_XDECREF(_eventlist[i].front());
 646       _eventlist[i].pop_front();
 647     }
 648   }
 649 }
 650
 651 void Bindings::fireEvent(EventData *data)
 652 {
 653   CallbackList::iterator c_it, c_end = _eventlist[data->action].end();
 654   for (c_it = _eventlist[data->action].begin(); c_it != c_end; ++c_it)
 655     python_callback(*c_it, data);
 656 }
 657
 658 }