Dogcows Code - chaz/openbox/blob - util/epist/screen.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; -*-
   2 // screen.cc for Epistrophy - a key handler for NETWM/EWMH window managers.
   3 // Copyright (c) 2002 - 2002 Ben Jansens <ben at orodu.net>
   4 //
   5 // Permission is hereby granted, free of charge, to any person obtaining a
   6 // copy of this software and associated documentation files (the "Software"),
   7 // to deal in the Software without restriction, including without limitation
   8 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9 // and/or sell copies of the Software, and to permit persons to whom the
  10 // Software is furnished to do so, subject to the following conditions:
  11 //
  12 // The above copyright notice and this permission notice shall be included in
  13 // all copies or substantial portions of the Software.
  14 //
  15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21 // DEALINGS IN THE SOFTWARE.
  22
  23 #ifdef    HAVE_CONFIG_H
  24 #  include "../../config.h"
  25 #endif // HAVE_CONFIG_H
  26
  27 extern "C" {
  28 #ifdef    HAVE_STDIO_H
  29 #  include <stdio.h>
  30 #endif // HAVE_STDIO_H
  31
  32 #ifdef    HAVE_UNISTD_H
  33 #  include <sys/types.h>
  34 #  include <unistd.h>
  35 #endif // HAVE_UNISTD_H
  36 }
  37
  38 #include <iostream>
  39 #include <string>
  40
  41 using std::cout;
  42 using std::endl;
  43 using std::hex;
  44 using std::dec;
  45 using std::string;
  46
  47 #include "../../src/BaseDisplay.hh"
  48 #include "../../src/XAtom.hh"
  49 #include "screen.hh"
  50 #include "epist.hh"
  51
  52
  53 screen::screen(epist *epist, int number)
  54   : _clients(epist->clientsList()),
  55     _active(epist->activeWindow()) {
  56   _epist = epist;
  57   _xatom = _epist->xatom();
  58   _last_active = _clients.end();
  59   _number = number;
  60   _info = _epist->getScreenInfo(_number);
  61   _root = _info->getRootWindow();
  62
  63   // find a window manager supporting NETWM, waiting for it to load if we must
  64   int count = 20;  // try for 20 seconds
  65   _managed = false;
  66   while (! (_epist->doShutdown() || _managed || count <= 0)) {
  67     if (! (_managed = findSupportingWM()))
  68       sleep(1);
  69     --count;
  70   }
  71   if (_managed)
  72     cout << "Found compatible window manager '" << _wm_name << "' for screen "
  73          << _number << ".\n";
  74   else {
  75     cout << "Unable to find a compatible window manager for screen " <<
  76       _number << ".\n";
  77     return;
  78   }
  79
  80   XSelectInput(_epist->getXDisplay(), _root, PropertyChangeMask);
  81 }
  82
  83 screen::~screen() {
  84   if (_managed)
  85     XSelectInput(_epist->getXDisplay(), _root, None);
  86 }
  87
  88
  89 bool screen::findSupportingWM() {
  90   Window support_win;
  91   if (! _xatom->getValue(_root, XAtom::net_supporting_wm_check, XAtom::window,
  92                          support_win) || support_win == None)
  93     return false;
  94
  95   string title;
  96   _xatom->getValue(support_win, XAtom::net_wm_name, XAtom::utf8, title);
  97   _wm_name = title;
  98   return true;
  99 }
 100
 101
 102 XWindow *screen::findWindow(const XEvent &e) const {
 103   assert(_managed);
 104
 105   WindowList::const_iterator it, end = _clients.end();
 106   for (it = _clients.begin(); it != end; ++it)
 107     if (**it == e.xany.window)
 108       break;
 109   if(it == end)
 110     return 0;
 111   return *it;
 112 }
 113
 114
 115 void screen::processEvent(const XEvent &e) {
 116   assert(_managed);
 117   assert(e.xany.window == _root);
 118
 119   switch (e.type) {
 120   case PropertyNotify:
 121     // root window
 122     if (e.xproperty.atom == _xatom->getAtom(XAtom::net_number_of_desktops))
 123       updateNumDesktops();
 124     if (e.xproperty.atom == _xatom->getAtom(XAtom::net_current_desktop))
 125       updateActiveDesktop();
 126     if (e.xproperty.atom == _xatom->getAtom(XAtom::net_active_window))
 127       updateActiveWindow();
 128     if (e.xproperty.atom == _xatom->getAtom(XAtom::net_client_list)) {
 129       // catch any window unmaps first
 130       XEvent ev;
 131       if (XCheckTypedWindowEvent(_epist->getXDisplay(), e.xany.window,
 132                                  DestroyNotify, &ev) ||
 133           XCheckTypedWindowEvent(_epist->getXDisplay(), e.xany.window,
 134                                  UnmapNotify, &ev)) {
 135         processEvent(ev);
 136       }
 137
 138       updateClientList();
 139     }
 140     break;
 141   case KeyPress:
 142     handleKeypress(e);
 143     break;
 144   }
 145 }
 146
 147 void screen::handleKeypress(const XEvent &e) {
 148   int scrolllockMask, numlockMask;
 149   _epist->getLockModifiers(numlockMask, scrolllockMask);
 150
 151   // Mask out the lock modifiers. We want our keys to always work
 152   // This should be made an option
 153   unsigned int state = e.xkey.state & ~(LockMask|scrolllockMask|numlockMask);
 154   const Action *it = _epist->getKeyTree().getAction(e, state, this);
 155
 156   if (!it)
 157     return;
 158
 159   switch (it->type()) {
 160   case Action::nextScreen:
 161     _epist->cycleScreen(_number, true);
 162     return;
 163
 164   case Action::prevScreen:
 165     _epist->cycleScreen(_number, false);
 166     return;
 167
 168   case Action::nextWorkspace:
 169     cycleWorkspace(true, it->number() != 0 ? it->number(): 1);
 170     return;
 171
 172   case Action::prevWorkspace:
 173     cycleWorkspace(false, it->number() != 0 ? it->number(): 1);
 174     return;
 175
 176   case Action::nextWindow:
 177
 178     cycleWindow(true, it->number() != 0 ? it->number(): 1);
 179     return;
 180
 181   case Action::prevWindow:
 182     cycleWindow(false, it->number() != 0 ? it->number(): 1);
 183     return;
 184
 185   case Action::nextWindowOnAllWorkspaces:
 186     cycleWindow(true, it->number() != 0 ? it->number(): 1,  false, true);
 187     return;
 188
 189   case Action::prevWindowOnAllWorkspaces:
 190     cycleWindow(false, it->number() != 0 ? it->number(): 1, false, true);
 191     return;
 192
 193   case Action::nextWindowOnAllScreens:
 194     cycleWindow(true, it->number() != 0 ? it->number(): 1, true);
 195     return;
 196
 197   case Action::prevWindowOnAllScreens:
 198     cycleWindow(false, it->number() != 0 ? it->number(): 1, true);
 199     return;
 200
 201   case Action::nextWindowOfClass:
 202     cycleWindow(true, it->number() != 0 ? it->number(): 1,
 203                 false, false, true, it->string());
 204     return;
 205
 206   case Action::prevWindowOfClass:
 207     cycleWindow(false, it->number() != 0 ? it->number(): 1,
 208                 false, false, true, it->string());
 209     return;
 210
 211   case Action::nextWindowOfClassOnAllWorkspaces:
 212     cycleWindow(true, it->number() != 0 ? it->number(): 1,
 213                 false, true, true, it->string());
 214     return;
 215
 216   case Action::prevWindowOfClassOnAllWorkspaces:
 217     cycleWindow(false, it->number() != 0 ? it->number(): 1,
 218                 false, true, true, it->string());
 219     return;
 220
 221   case Action::changeWorkspace:
 222     changeWorkspace(it->number());
 223     return;
 224
 225   case Action::execute:
 226     execCommand(it->string());
 227     return;
 228
 229   default:
 230     break;
 231   }
 232
 233   // these actions require an active window
 234   if (_active != _clients.end()) {
 235     XWindow *window = *_active;
 236
 237     switch (it->type()) {
 238     case Action::iconify:
 239       window->iconify();
 240       return;
 241
 242     case Action::close:
 243       window->close();
 244       return;
 245
 246     case Action::raise:
 247       window->raise();
 248       return;
 249
 250     case Action::lower:
 251       window->lower();
 252       return;
 253
 254     case Action::sendToWorkspace:
 255       window->sendTo(it->number());
 256       return;
 257
 258     case Action::toggleomnipresent:
 259       if (window->desktop() == 0xffffffff)
 260         window->sendTo(_active_desktop);
 261       else
 262         window->sendTo(0xffffffff);
 263       return;
 264
 265     case Action::moveWindowUp:
 266       window->move(window->x(), window->y() - it->number());
 267       return;
 268
 269     case Action::moveWindowDown:
 270       window->move(window->x(), window->y() + it->number());
 271       return;
 272
 273     case Action::moveWindowLeft:
 274       window->move(window->x() - it->number(), window->y());
 275       return;
 276
 277     case Action::moveWindowRight:
 278       window->move(window->x() + it->number(), window->y());
 279       return;
 280
 281     case Action::resizeWindowWidth:
 282       window->resizeRel(it->number(), 0);
 283       return;
 284
 285     case Action::resizeWindowHeight:
 286       window->resizeRel(0, it->number());
 287       return;
 288
 289     case Action::toggleshade:
 290       window->shade(! window->shaded());
 291       return;
 292
 293     case Action::toggleMaximizeHorizontal:
 294       window->toggleMaximize(XWindow::Max_Horz);
 295       return;
 296
 297     case Action::toggleMaximizeVertical:
 298       window->toggleMaximize(XWindow::Max_Vert);
 299       return;
 300
 301     case Action::toggleMaximizeFull:
 302       window->toggleMaximize(XWindow::Max_Full);
 303       return;
 304
 305     default:
 306       assert(false);  // unhandled action type!
 307       break;
 308     }
 309   }
 310 }
 311
 312 // do we want to add this window to our list?
 313 bool screen::doAddWindow(Window window) const {
 314   assert(_managed);
 315
 316   Atom type;
 317   if (! _xatom->getValue(window, XAtom::net_wm_window_type, XAtom::atom,
 318                          type))
 319     return True;
 320
 321   if (type == _xatom->getAtom(XAtom::net_wm_window_type_dock) ||
 322       type == _xatom->getAtom(XAtom::net_wm_window_type_menu))
 323     return False;
 324
 325   return True;
 326 }
 327
 328
 329 void screen::updateEverything() {
 330   updateNumDesktops();
 331   updateActiveDesktop();
 332   updateClientList();
 333   updateActiveWindow();
 334 }
 335
 336
 337 void screen::updateNumDesktops() {
 338   assert(_managed);
 339
 340   if (! _xatom->getValue(_root, XAtom::net_number_of_desktops, XAtom::cardinal,
 341                          (unsigned long)_num_desktops))
 342     _num_desktops = 1;  // assume that there is at least 1 desktop!
 343 }
 344
 345
 346 void screen::updateActiveDesktop() {
 347   assert(_managed);
 348
 349   if (! _xatom->getValue(_root, XAtom::net_current_desktop, XAtom::cardinal,
 350                          (unsigned long)_active_desktop))
 351     _active_desktop = 0;  // there must be at least one desktop, and it must
 352                           // be the current one
 353 }
 354
 355
 356 void screen::updateClientList() {
 357   assert(_managed);
 358
 359   WindowList::iterator insert_point = _active;
 360   if (insert_point != _clients.end())
 361     ++insert_point; // get to the item client the focused client
 362
 363   // get the client list from the root window
 364   Window *rootclients = 0;
 365   unsigned long num = (unsigned) -1;
 366   if (! _xatom->getValue(_root, XAtom::net_client_list, XAtom::window, num,
 367                          &rootclients))
 368     num = 0;
 369
 370   WindowList::iterator it;
 371   const WindowList::iterator end = _clients.end();
 372   unsigned long i;
 373
 374   // insert new clients after the active window
 375   for (i = 0; i < num; ++i) {
 376     for (it = _clients.begin(); it != end; ++it)
 377       if (**it == rootclients[i])
 378         break;
 379     if (it == end) {  // didn't already exist
 380       if (doAddWindow(rootclients[i])) {
 381         //        cout << "Added window: 0x" << hex << rootclients[i] << dec << endl;
 382         _clients.insert(insert_point, new XWindow(_epist, this,
 383                                                   rootclients[i]));
 384       }
 385     }
 386   }
 387
 388   // remove clients that no longer exist (that belong to this screen)
 389   for (it = _clients.begin(); it != end;) {
 390     WindowList::iterator it2 = it;
 391     ++it;
 392
 393     // is on another screen?
 394     if ((*it2)->getScreen() != this)
 395       continue;
 396
 397     for (i = 0; i < num; ++i)
 398       if (**it2 == rootclients[i])
 399         break;
 400     if (i == num)  { // no longer exists
 401       //      cout << "Removed window: 0x" << hex << (*it2)->window() << dec << endl;
 402       // watch for the active and last-active window
 403       if (it2 == _active)
 404         _active = _clients.end();
 405       if (it2 == _last_active)
 406         _last_active = _clients.end();
 407       delete *it2;
 408       _clients.erase(it2);
 409     }
 410   }
 411
 412   if (rootclients) delete [] rootclients;
 413 }
 414
 415
 416 const XWindow *screen::lastActiveWindow() const {
 417   if (_last_active != _clients.end())
 418     return *_last_active;
 419
 420   // find a window if one exists
 421   WindowList::const_iterator it, end = _clients.end();
 422   for (it = _clients.begin(); it != end; ++it)
 423     if ((*it)->getScreen() == this && ! (*it)->iconic() &&
 424         ((*it)->desktop() == 0xffffffff || (*it)->desktop() == _active_desktop))
 425       return *it;
 426
 427   // no windows on this screen
 428   return 0;
 429 }
 430
 431
 432 void screen::updateActiveWindow() {
 433   assert(_managed);
 434
 435   Window a = None;
 436   _xatom->getValue(_root, XAtom::net_active_window, XAtom::window, a);
 437
 438   WindowList::iterator it, end = _clients.end();
 439   for (it = _clients.begin(); it != end; ++it) {
 440     if (**it == a) {
 441       if ((*it)->getScreen() != this)
 442         return;
 443       break;
 444     }
 445   }
 446   _active = it;
 447   if (it != end)
 448     _last_active = it;
 449
 450   /*  cout << "Active window is now: ";
 451       if (_active == _clients.end()) cout << "None\n";
 452       else cout << "0x" << hex << (*_active)->window() << dec << endl;
 453   */
 454 }
 455
 456
 457 void screen::execCommand(const string &cmd) const {
 458   pid_t pid;
 459   if ((pid = fork()) == 0) {
 460     // make the command run on the correct screen
 461     if (putenv(const_cast<char*>(_info->displayString().c_str()))) {
 462       cout << "warning: couldn't set environment variable 'DISPLAY'\n";
 463       perror("putenv()");
 464     }
 465     execl("/bin/sh", "sh", "-c", cmd.c_str(), NULL);
 466     exit(-1);
 467   } else if (pid == -1) {
 468     cout << _epist->getApplicationName() <<
 469       ": Could not fork a process for executing a command\n";
 470   }
 471 }
 472
 473
 474 void screen::cycleWindow(const bool forward, const int increment,
 475                          const bool allscreens, const bool alldesktops,
 476                          const bool sameclass, const string &cn) const {
 477   assert(_managed);
 478   assert(increment > 0);
 479
 480   if (_clients.empty()) return;
 481
 482   string classname(cn);
 483   if (sameclass && classname.empty() && _active != _clients.end())
 484     classname = (*_active)->appClass();
 485
 486   WindowList::const_iterator target = _active,
 487     begin = _clients.begin(),
 488     end = _clients.end();
 489
 490   const XWindow *t = 0;
 491
 492   for (int x = 0; x < increment; ++x) {
 493     while (1) {
 494       if (forward) {
 495         if (target == end) {
 496           target = begin;
 497         } else {
 498           ++target;
 499         }
 500       } else {
 501         if (target == begin)
 502           target = end;
 503         --target;
 504       }
 505
 506       // must be no window to focus
 507       if (target == _active)
 508         return;
 509
 510       // start back at the beginning of the loop
 511       if (target == end)
 512         continue;
 513
 514       // determine if this window is invalid for cycling to
 515       t = *target;
 516       if (t->iconic()) continue;
 517       if (! allscreens && t->getScreen() != this) continue;
 518       if (! alldesktops && ! (t->desktop() == _active_desktop ||
 519                               t->desktop() == 0xffffffff)) continue;
 520       if (sameclass && ! classname.empty() &&
 521           t->appClass() != classname) continue;
 522       if (! t->canFocus()) continue;
 523
 524       // found a good window so break out of the while, and perhaps continue
 525       // with the for loop
 526       break;
 527     }
 528   }
 529
 530   // phew. we found the window, so focus it.
 531   t->focus();
 532 }
 533
 534
 535 void screen::cycleWorkspace(const bool forward, const int increment,
 536                             const bool loop) const {
 537   assert(_managed);
 538   assert(increment > 0);
 539
 540   unsigned int destination = _active_desktop;
 541
 542   for (int x = 0; x < increment; ++x) {
 543     if (forward) {
 544       if (destination < _num_desktops - 1)
 545         ++destination;
 546       else if (loop)
 547         destination = 0;
 548     } else {
 549       if (destination > 0)
 550         --destination;
 551       else if (loop)
 552         destination = _num_desktops - 1;
 553     }
 554   }
 555
 556   if (destination != _active_desktop)
 557     changeWorkspace(destination);
 558 }
 559
 560
 561 void screen::changeWorkspace(const int num) const {
 562   assert(_managed);
 563
 564   _xatom->sendClientMessage(_root, XAtom::net_current_desktop, _root, num);
 565 }
 566
 567 void screen::grabKey(const KeyCode keyCode, const int modifierMask) const {
 568
 569   Display *display = _epist->getXDisplay();
 570   int numlockMask, scrolllockMask;
 571
 572   _epist->getLockModifiers(numlockMask, scrolllockMask);
 573
 574   XGrabKey(display, keyCode, modifierMask,
 575            _root, True, GrabModeAsync, GrabModeAsync);
 576   XGrabKey(display, keyCode,
 577            modifierMask|LockMask,
 578            _root, True, GrabModeAsync, GrabModeAsync);
 579   XGrabKey(display, keyCode,
 580            modifierMask|scrolllockMask,
 581            _root, True, GrabModeAsync, GrabModeAsync);
 582   XGrabKey(display, keyCode,
 583            modifierMask|numlockMask,
 584            _root, True, GrabModeAsync, GrabModeAsync);
 585
 586   XGrabKey(display, keyCode,
 587            modifierMask|LockMask|scrolllockMask,
 588            _root, True, GrabModeAsync, GrabModeAsync);
 589   XGrabKey(display, keyCode,
 590            modifierMask|scrolllockMask|numlockMask,
 591            _root, True, GrabModeAsync, GrabModeAsync);
 592   XGrabKey(display, keyCode,
 593            modifierMask|numlockMask|LockMask,
 594            _root, True, GrabModeAsync, GrabModeAsync);
 595
 596   XGrabKey(display, keyCode,
 597            modifierMask|numlockMask|LockMask|scrolllockMask,
 598            _root, True, GrabModeAsync, GrabModeAsync);
 599 }
 600
 601 void screen::ungrabKey(const KeyCode keyCode, const int modifierMask) const {
 602
 603   Display *display = _epist->getXDisplay();
 604   int numlockMask, scrolllockMask;
 605
 606   _epist->getLockModifiers(numlockMask, scrolllockMask);
 607
 608   XUngrabKey(display, keyCode, modifierMask, _root);
 609   XUngrabKey(display, keyCode, modifierMask|LockMask, _root);
 610   XUngrabKey(display, keyCode, modifierMask|scrolllockMask, _root);
 611   XUngrabKey(display, keyCode, modifierMask|numlockMask, _root);
 612   XUngrabKey(display, keyCode, modifierMask|LockMask|scrolllockMask, _root);
 613   XUngrabKey(display, keyCode, modifierMask|scrolllockMask|numlockMask, _root);
 614   XUngrabKey(display, keyCode, modifierMask|numlockMask|LockMask, _root);
 615   XUngrabKey(display, keyCode, modifierMask|numlockMask|LockMask|
 616              scrolllockMask, _root);
 617 }