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

   1 // -*- mode: C++; indent-tabs-mode: nil; -*-
   2 // screen.cc for Epistophy - 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);
 170     return;
 171
 172   case Action::prevWorkspace:
 173     cycleWorkspace(false);
 174     return;
 175
 176   case Action::nextWindow:
 177     cycleWindow(true);
 178     return;
 179
 180   case Action::prevWindow:
 181     cycleWindow(false);
 182     return;
 183
 184   case Action::nextWindowOnAllWorkspaces:
 185     cycleWindow(true, false, true);
 186     return;
 187
 188   case Action::prevWindowOnAllWorkspaces:
 189     cycleWindow(false, false, true);
 190     return;
 191
 192   case Action::nextWindowOnAllScreens:
 193     cycleWindow(true, true);
 194     return;
 195
 196   case Action::prevWindowOnAllScreens:
 197     cycleWindow(false, true);
 198     return;
 199
 200   case Action::nextWindowOfClass:
 201     cycleWindow(true, false, false, true, it->string());
 202     return;
 203
 204   case Action::prevWindowOfClass:
 205     cycleWindow(false, false, false, true, it->string());
 206     return;
 207
 208   case Action::nextWindowOfClassOnAllWorkspaces:
 209     cycleWindow(true, false, true, true, it->string());
 210     return;
 211
 212   case Action::prevWindowOfClassOnAllWorkspaces:
 213     cycleWindow(false, false, true, true, it->string());
 214     return;
 215
 216   case Action::changeWorkspace:
 217     changeWorkspace(it->number());
 218     return;
 219
 220   case Action::execute:
 221     execCommand(it->string());
 222     return;
 223
 224   default:
 225     break;
 226   }
 227
 228   // these actions require an active window
 229   if (_active != _clients.end()) {
 230     XWindow *window = *_active;
 231
 232     switch (it->type()) {
 233     case Action::iconify:
 234       window->iconify();
 235       return;
 236
 237     case Action::close:
 238       window->close();
 239       return;
 240
 241     case Action::raise:
 242       window->raise();
 243       return;
 244
 245     case Action::lower:
 246       window->lower();
 247       return;
 248
 249     case Action::sendToWorkspace:
 250       window->sendTo(it->number());
 251       return;
 252
 253     case Action::toggleomnipresent:
 254       if (window->desktop() == 0xffffffff)
 255         window->sendTo(_active_desktop);
 256       else
 257         window->sendTo(0xffffffff);
 258       return;
 259
 260     case Action::moveWindowUp:
 261       window->move(window->x(), window->y() - it->number());
 262       return;
 263
 264     case Action::moveWindowDown:
 265       window->move(window->x(), window->y() + it->number());
 266       return;
 267
 268     case Action::moveWindowLeft:
 269       window->move(window->x() - it->number(), window->y());
 270       return;
 271
 272     case Action::moveWindowRight:
 273       window->move(window->x() + it->number(), window->y());
 274       return;
 275
 276     case Action::resizeWindowWidth:
 277       window->resize(window->width() + it->number(), window->height());
 278       return;
 279
 280     case Action::resizeWindowHeight:
 281       window->resize(window->width(), window->height() + it->number());
 282       return;
 283
 284     case Action::toggleshade:
 285       window->shade(! window->shaded());
 286       return;
 287
 288     case Action::toggleMaximizeHorizontal:
 289       window->toggleMaximize(XWindow::Max_Horz);
 290       return;
 291
 292     case Action::toggleMaximizeVertical:
 293       window->toggleMaximize(XWindow::Max_Vert);
 294       return;
 295
 296     case Action::toggleMaximizeFull:
 297       window->toggleMaximize(XWindow::Max_Full);
 298       return;
 299
 300     default:
 301       assert(false);  // unhandled action type!
 302       break;
 303     }
 304   }
 305 }
 306
 307 // do we want to add this window to our list?
 308 bool screen::doAddWindow(Window window) const {
 309   assert(_managed);
 310
 311   Atom type;
 312   if (! _xatom->getValue(window, XAtom::net_wm_window_type, XAtom::atom,
 313                          type))
 314     return True;
 315
 316   if (type == _xatom->getAtom(XAtom::net_wm_window_type_dock) ||
 317       type == _xatom->getAtom(XAtom::net_wm_window_type_menu))
 318     return False;
 319
 320   return True;
 321 }
 322
 323
 324 void screen::updateEverything() {
 325   updateNumDesktops();
 326   updateActiveDesktop();
 327   updateClientList();
 328   updateActiveWindow();
 329 }
 330
 331
 332 void screen::updateNumDesktops() {
 333   assert(_managed);
 334
 335   if (! _xatom->getValue(_root, XAtom::net_number_of_desktops, XAtom::cardinal,
 336                          (unsigned long)_num_desktops))
 337     _num_desktops = 1;  // assume that there is at least 1 desktop!
 338 }
 339
 340
 341 void screen::updateActiveDesktop() {
 342   assert(_managed);
 343
 344   if (! _xatom->getValue(_root, XAtom::net_current_desktop, XAtom::cardinal,
 345                          (unsigned long)_active_desktop))
 346     _active_desktop = 0;  // there must be at least one desktop, and it must
 347                           // be the current one
 348 }
 349
 350
 351 void screen::updateClientList() {
 352   assert(_managed);
 353
 354   WindowList::iterator insert_point = _active;
 355   if (insert_point != _clients.end())
 356     ++insert_point; // get to the item client the focused client
 357
 358   // get the client list from the root window
 359   Window *rootclients = 0;
 360   unsigned long num = (unsigned) -1;
 361   if (! _xatom->getValue(_root, XAtom::net_client_list, XAtom::window, num,
 362                          &rootclients))
 363     num = 0;
 364
 365   WindowList::iterator it;
 366   const WindowList::iterator end = _clients.end();
 367   unsigned long i;
 368
 369   // insert new clients after the active window
 370   for (i = 0; i < num; ++i) {
 371     for (it = _clients.begin(); it != end; ++it)
 372       if (**it == rootclients[i])
 373         break;
 374     if (it == end) {  // didn't already exist
 375       if (doAddWindow(rootclients[i])) {
 376         //        cout << "Added window: 0x" << hex << rootclients[i] << dec << endl;
 377         _clients.insert(insert_point, new XWindow(_epist, this,
 378                                                   rootclients[i]));
 379       }
 380     }
 381   }
 382
 383   // remove clients that no longer exist (that belong to this screen)
 384   for (it = _clients.begin(); it != end;) {
 385     WindowList::iterator it2 = it;
 386     ++it;
 387
 388     // is on another screen?
 389     if ((*it2)->getScreen() != this)
 390       continue;
 391
 392     for (i = 0; i < num; ++i)
 393       if (**it2 == rootclients[i])
 394         break;
 395     if (i == num)  { // no longer exists
 396       //      cout << "Removed window: 0x" << hex << (*it2)->window() << dec << endl;
 397       // watch for the active and last-active window
 398       if (it2 == _active)
 399         _active = _clients.end();
 400       if (it2 == _last_active)
 401         _last_active = _clients.end();
 402       delete *it2;
 403       _clients.erase(it2);
 404     }
 405   }
 406
 407   if (rootclients) delete [] rootclients;
 408 }
 409
 410
 411 const XWindow *screen::lastActiveWindow() const {
 412   if (_last_active != _clients.end())
 413     return *_last_active;
 414
 415   // find a window if one exists
 416   WindowList::const_iterator it, end = _clients.end();
 417   for (it = _clients.begin(); it != end; ++it)
 418     if ((*it)->getScreen() == this && ! (*it)->iconic() &&
 419         ((*it)->desktop() == 0xffffffff || (*it)->desktop() == _active_desktop))
 420       return *it;
 421
 422   // no windows on this screen
 423   return 0;
 424 }
 425
 426
 427 void screen::updateActiveWindow() {
 428   assert(_managed);
 429
 430   Window a = None;
 431   _xatom->getValue(_root, XAtom::net_active_window, XAtom::window, a);
 432
 433   WindowList::iterator it, end = _clients.end();
 434   for (it = _clients.begin(); it != end; ++it) {
 435     if (**it == a) {
 436       if ((*it)->getScreen() != this)
 437         return;
 438       break;
 439     }
 440   }
 441   _active = it;
 442   if (it != end)
 443     _last_active = it;
 444
 445   /*  cout << "Active window is now: ";
 446       if (_active == _clients.end()) cout << "None\n";
 447       else cout << "0x" << hex << (*_active)->window() << dec << endl;
 448   */
 449 }
 450
 451
 452 void screen::execCommand(const string &cmd) const {
 453   pid_t pid;
 454   if ((pid = fork()) == 0) {
 455     // make the command run on the correct screen
 456     if (putenv(const_cast<char*>(_info->displayString().c_str()))) {
 457       cout << "warning: couldn't set environment variable 'DISPLAY'\n";
 458       perror("putenv()");
 459     }
 460     execl("/bin/sh", "sh", "-c", cmd.c_str(), NULL);
 461     exit(-1);
 462   } else if (pid == -1) {
 463     cout << _epist->getApplicationName() <<
 464       ": Could not fork a process for executing a command\n";
 465   }
 466 }
 467
 468
 469 void screen::cycleWindow(const bool forward, const bool allscreens,
 470                          const bool alldesktops, const bool sameclass,
 471                          const string &cn) const {
 472   assert(_managed);
 473
 474   if (_clients.empty()) return;
 475
 476   string classname(cn);
 477   if (sameclass && classname.empty() && _active != _clients.end())
 478     classname = (*_active)->appClass();
 479
 480   WindowList::const_iterator target = _active,
 481     begin = _clients.begin(),
 482     end = _clients.end();
 483
 484   while (1) {
 485     if (forward) {
 486       if (target == end) {
 487         target = begin;
 488       } else {
 489         ++target;
 490       }
 491     } else {
 492       if (target == begin)
 493         target = end;
 494       --target;
 495     }
 496
 497     // must be no window to focus
 498     if (target == _active)
 499       return;
 500
 501     // start back at the beginning of the loop
 502     if (target == end)
 503       continue;
 504
 505     // determine if this window is invalid for cycling to
 506     const XWindow *t = *target;
 507     if (t->iconic()) continue;
 508     if (! allscreens && t->getScreen() != this) continue;
 509     if (! alldesktops && ! (t->desktop() == _active_desktop ||
 510                             t->desktop() == 0xffffffff)) continue;
 511     if (sameclass && ! classname.empty() &&
 512         t->appClass() != classname) continue;
 513     if (! t->canFocus()) continue;
 514
 515     // found a good window!
 516     t->focus();
 517     return;
 518   }
 519 }
 520
 521
 522 void screen::cycleWorkspace(const bool forward, const bool loop) const {
 523   assert(_managed);
 524
 525   unsigned int destination = _active_desktop;
 526
 527   if (forward) {
 528     if (destination < _num_desktops - 1)
 529       ++destination;
 530     else if (loop)
 531       destination = 0;
 532   } else {
 533     if (destination > 0)
 534       --destination;
 535     else if (loop)
 536       destination = _num_desktops - 1;
 537   }
 538
 539   if (destination != _active_desktop)
 540     changeWorkspace(destination);
 541 }
 542
 543
 544 void screen::changeWorkspace(const int num) const {
 545   assert(_managed);
 546
 547   _xatom->sendClientMessage(_root, XAtom::net_current_desktop, _root, num);
 548 }
 549
 550 void screen::grabKey(const KeyCode keyCode, const int modifierMask) const {
 551
 552   Display *display = _epist->getXDisplay();
 553   int numlockMask, scrolllockMask;
 554
 555   _epist->getLockModifiers(numlockMask, scrolllockMask);
 556
 557   XGrabKey(display, keyCode, modifierMask,
 558            _root, True, GrabModeAsync, GrabModeAsync);
 559   XGrabKey(display, keyCode,
 560            modifierMask|LockMask,
 561            _root, True, GrabModeAsync, GrabModeAsync);
 562   XGrabKey(display, keyCode,
 563            modifierMask|scrolllockMask,
 564            _root, True, GrabModeAsync, GrabModeAsync);
 565   XGrabKey(display, keyCode,
 566            modifierMask|numlockMask,
 567            _root, True, GrabModeAsync, GrabModeAsync);
 568
 569   XGrabKey(display, keyCode,
 570            modifierMask|LockMask|scrolllockMask,
 571            _root, True, GrabModeAsync, GrabModeAsync);
 572   XGrabKey(display, keyCode,
 573            modifierMask|scrolllockMask|numlockMask,
 574            _root, True, GrabModeAsync, GrabModeAsync);
 575   XGrabKey(display, keyCode,
 576            modifierMask|numlockMask|LockMask,
 577            _root, True, GrabModeAsync, GrabModeAsync);
 578
 579   XGrabKey(display, keyCode,
 580            modifierMask|numlockMask|LockMask|scrolllockMask,
 581            _root, True, GrabModeAsync, GrabModeAsync);
 582 }
 583
 584 void screen::ungrabKey(const KeyCode keyCode, const int modifierMask) const {
 585
 586   Display *display = _epist->getXDisplay();
 587   int numlockMask, scrolllockMask;
 588
 589   _epist->getLockModifiers(numlockMask, scrolllockMask);
 590
 591   XUngrabKey(display, keyCode, modifierMask, _root);
 592   XUngrabKey(display, keyCode, modifierMask|LockMask, _root);
 593   XUngrabKey(display, keyCode, modifierMask|scrolllockMask, _root);
 594   XUngrabKey(display, keyCode, modifierMask|numlockMask, _root);
 595   XUngrabKey(display, keyCode, modifierMask|LockMask|scrolllockMask, _root);
 596   XUngrabKey(display, keyCode, modifierMask|scrolllockMask|numlockMask, _root);
 597   XUngrabKey(display, keyCode, modifierMask|numlockMask|LockMask, _root);
 598   XUngrabKey(display, keyCode, modifierMask|numlockMask|LockMask|
 599              scrolllockMask, _root);
 600 }