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

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