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     // we subtract one so counting starts at 1 in the config file
 218       changeWorkspace(it->number() - 1);
 219       return;
 220
 221   case Action::execute:
 222       execCommand(it->string());
 223       return;
 224
 225   default:
 226       break;
 227   }
 228
 229   // these actions require an active window
 230   if (_active != _clients.end()) {
 231       XWindow *window = *_active;
 232
 233       switch (it->type()) {
 234       case Action::iconify:
 235           window->iconify();
 236           return;
 237
 238       case Action::close:
 239           window->close();
 240           return;
 241
 242       case Action::raise:
 243           window->raise();
 244           return;
 245
 246       case Action::lower:
 247           window->lower();
 248           return;
 249
 250       case Action::sendToWorkspace:
 251           window->sendTo(it->number());
 252           return;
 253
 254       case Action::toggleomnipresent:
 255           if (window->desktop() == 0xffffffff)
 256             window->sendTo(_active_desktop);
 257           else
 258             window->sendTo(0xffffffff);
 259           return;
 260
 261       case Action::moveWindowUp:
 262           window->move(window->x(), window->y() - it->number());
 263           return;
 264
 265       case Action::moveWindowDown:
 266           window->move(window->x(), window->y() + it->number());
 267           return;
 268
 269       case Action::moveWindowLeft:
 270           window->move(window->x() - it->number(), window->y());
 271           return;
 272
 273       case Action::moveWindowRight:
 274           window->move(window->x() + it->number(), window->y());
 275           return;
 276
 277       case Action::resizeWindowWidth:
 278           window->resize(window->width() + it->number(), window->height());
 279           return;
 280
 281       case Action::resizeWindowHeight:
 282           window->resize(window->width(), window->height() + it->number());
 283           return;
 284
 285       case Action::toggleshade:
 286           window->shade(! window->shaded());
 287           return;
 288
 289       case Action::toggleMaximizeHorizontal:
 290           window->toggleMaximize(XWindow::Max_Horz);
 291           return;
 292
 293       case Action::toggleMaximizeVertical:
 294           window->toggleMaximize(XWindow::Max_Vert);
 295           return;
 296
 297       case Action::toggleMaximizeFull:
 298           window->toggleMaximize(XWindow::Max_Full);
 299           return;
 300
 301       default:
 302           assert(false);  // unhandled action type!
 303           break;
 304       }
 305   }
 306 }
 307
 308 // do we want to add this window to our list?
 309 bool screen::doAddWindow(Window window) const {
 310   assert(_managed);
 311
 312   Atom type;
 313   if (! _xatom->getValue(window, XAtom::net_wm_window_type, XAtom::atom,
 314                          type))
 315     return True;
 316
 317   if (type == _xatom->getAtom(XAtom::net_wm_window_type_dock) ||
 318       type == _xatom->getAtom(XAtom::net_wm_window_type_menu))
 319     return False;
 320
 321   return True;
 322 }
 323
 324
 325 void screen::updateEverything() {
 326   updateNumDesktops();
 327   updateActiveDesktop();
 328   updateClientList();
 329   updateActiveWindow();
 330 }
 331
 332
 333 void screen::updateNumDesktops() {
 334   assert(_managed);
 335
 336   if (! _xatom->getValue(_root, XAtom::net_number_of_desktops, XAtom::cardinal,
 337                          (unsigned long)_num_desktops))
 338     _num_desktops = 1;  // assume that there is at least 1 desktop!
 339 }
 340
 341
 342 void screen::updateActiveDesktop() {
 343   assert(_managed);
 344
 345   if (! _xatom->getValue(_root, XAtom::net_current_desktop, XAtom::cardinal,
 346                          (unsigned long)_active_desktop))
 347     _active_desktop = 0;  // there must be at least one desktop, and it must
 348                           // be the current one
 349 }
 350
 351
 352 void screen::updateClientList() {
 353   assert(_managed);
 354
 355   WindowList::iterator insert_point = _active;
 356   if (insert_point != _clients.end())
 357     ++insert_point; // get to the item client the focused client
 358
 359   // get the client list from the root window
 360   Window *rootclients = 0;
 361   unsigned long num = (unsigned) -1;
 362   if (! _xatom->getValue(_root, XAtom::net_client_list, XAtom::window, num,
 363                          &rootclients))
 364     num = 0;
 365
 366   WindowList::iterator it;
 367   const WindowList::iterator end = _clients.end();
 368   unsigned long i;
 369
 370   // insert new clients after the active window
 371   for (i = 0; i < num; ++i) {
 372     for (it = _clients.begin(); it != end; ++it)
 373       if (**it == rootclients[i])
 374         break;
 375     if (it == end) {  // didn't already exist
 376       if (doAddWindow(rootclients[i])) {
 377 //        cout << "Added window: 0x" << hex << rootclients[i] << dec << endl;
 378         _clients.insert(insert_point, new XWindow(_epist, this,
 379                                                   rootclients[i]));
 380       }
 381     }
 382   }
 383
 384   // remove clients that no longer exist (that belong to this screen)
 385   for (it = _clients.begin(); it != end;) {
 386     WindowList::iterator it2 = it;
 387     ++it;
 388
 389     // is on another screen?
 390     if ((*it2)->getScreen() != this)
 391       continue;
 392
 393     for (i = 0; i < num; ++i)
 394       if (**it2 == rootclients[i])
 395         break;
 396     if (i == num)  { // no longer exists
 397 //      cout << "Removed window: 0x" << hex << (*it2)->window() << dec << endl;
 398       // watch for the active and last-active window
 399       if (it2 == _active)
 400         _active = _clients.end();
 401       if (it2 == _last_active)
 402         _last_active = _clients.end();
 403       delete *it2;
 404       _clients.erase(it2);
 405     }
 406   }
 407
 408   if (rootclients) delete [] rootclients;
 409 }
 410
 411
 412 const XWindow *screen::lastActiveWindow() const {
 413   if (_last_active != _clients.end())
 414     return *_last_active;
 415
 416   // find a window if one exists
 417   WindowList::const_iterator it, end = _clients.end();
 418   for (it = _clients.begin(); it != end; ++it)
 419     if ((*it)->getScreen() == this && ! (*it)->iconic() &&
 420         ((*it)->desktop() == 0xffffffff || (*it)->desktop() == _active_desktop))
 421       return *it;
 422
 423   // no windows on this screen
 424   return 0;
 425 }
 426
 427
 428 void screen::updateActiveWindow() {
 429   assert(_managed);
 430
 431   Window a = None;
 432   _xatom->getValue(_root, XAtom::net_active_window, XAtom::window, a);
 433
 434   WindowList::iterator it, end = _clients.end();
 435   for (it = _clients.begin(); it != end; ++it) {
 436     if (**it == a) {
 437       if ((*it)->getScreen() != this)
 438         return;
 439       break;
 440     }
 441   }
 442   _active = it;
 443   if (it != end)
 444     _last_active = it;
 445
 446 /*  cout << "Active window is now: ";
 447   if (_active == _clients.end()) cout << "None\n";
 448   else cout << "0x" << hex << (*_active)->window() << dec << endl;
 449 */
 450 }
 451
 452
 453 void screen::execCommand(const string &cmd) const {
 454   pid_t pid;
 455   if ((pid = fork()) == 0) {
 456     // make the command run on the correct screen
 457     if (putenv(const_cast<char*>(_info->displayString().c_str()))) {
 458       cout << "warning: couldn't set environment variable 'DISPLAY'\n";
 459       perror("putenv()");
 460     }
 461     execl("/bin/sh", "sh", "-c", cmd.c_str(), NULL);
 462     exit(-1);
 463   } else if (pid == -1) {
 464     cout << _epist->getApplicationName() <<
 465       ": Could not fork a process for executing a command\n";
 466   }
 467 }
 468
 469
 470 void screen::cycleWindow(const bool forward, const bool allscreens,
 471                          const bool alldesktops, const bool sameclass,
 472                          const string &cn) const {
 473   assert(_managed);
 474
 475   if (_clients.empty()) return;
 476
 477   string classname(cn);
 478   if (sameclass && classname.empty() && _active != _clients.end())
 479     classname = (*_active)->appClass();
 480
 481   WindowList::const_iterator target = _active,
 482                              begin = _clients.begin(),
 483                              end = _clients.end();
 484
 485   while (1) {
 486     if (forward) {
 487       if (target == end) {
 488         target = begin;
 489       } else {
 490         ++target;
 491       }
 492     } else {
 493       if (target == begin)
 494         target = end;
 495       --target;
 496     }
 497
 498     // must be no window to focus
 499     if (target == _active)
 500       return;
 501
 502     // start back at the beginning of the loop
 503     if (target == end)
 504       continue;
 505
 506     // determine if this window is invalid for cycling to
 507     const XWindow *t = *target;
 508     if (t->iconic()) continue;
 509     if (! allscreens && t->getScreen() != this) continue;
 510     if (! alldesktops && ! (t->desktop() == _active_desktop ||
 511                             t->desktop() == 0xffffffff)) continue;
 512     if (sameclass && ! classname.empty() &&
 513         t->appClass() != classname) continue;
 514     if (! t->canFocus()) continue;
 515
 516     // found a good window!
 517     t->focus();
 518     return;
 519   }
 520 }
 521
 522
 523 void screen::cycleWorkspace(const bool forward, const bool loop) const {
 524   assert(_managed);
 525
 526   unsigned int destination = _active_desktop;
 527
 528   if (forward) {
 529     if (destination < _num_desktops - 1)
 530       ++destination;
 531     else if (loop)
 532       destination = 0;
 533   } else {
 534     if (destination > 0)
 535       --destination;
 536     else if (loop)
 537       destination = _num_desktops - 1;
 538   }
 539
 540   if (destination != _active_desktop)
 541     changeWorkspace(destination);
 542 }
 543
 544
 545 void screen::changeWorkspace(const int num) const {
 546   assert(_managed);
 547
 548   _xatom->sendClientMessage(_root, XAtom::net_current_desktop, _root, num);
 549 }
 550
 551 void screen::grabKey(const KeyCode keyCode, const int modifierMask) const {
 552
 553   Display *display = _epist->getXDisplay();
 554   int numlockMask, scrolllockMask;
 555
 556   _epist->getLockModifiers(numlockMask, scrolllockMask);
 557
 558   XGrabKey(display, keyCode, modifierMask,
 559            _root, True, GrabModeAsync, GrabModeAsync);
 560   XGrabKey(display, keyCode,
 561            modifierMask|LockMask,
 562            _root, True, GrabModeAsync, GrabModeAsync);
 563   XGrabKey(display, keyCode,
 564            modifierMask|scrolllockMask,
 565            _root, True, GrabModeAsync, GrabModeAsync);
 566   XGrabKey(display, keyCode,
 567            modifierMask|numlockMask,
 568            _root, True, GrabModeAsync, GrabModeAsync);
 569
 570   XGrabKey(display, keyCode,
 571            modifierMask|LockMask|scrolllockMask,
 572            _root, True, GrabModeAsync, GrabModeAsync);
 573   XGrabKey(display, keyCode,
 574            modifierMask|scrolllockMask|numlockMask,
 575            _root, True, GrabModeAsync, GrabModeAsync);
 576   XGrabKey(display, keyCode,
 577            modifierMask|numlockMask|LockMask,
 578            _root, True, GrabModeAsync, GrabModeAsync);
 579
 580   XGrabKey(display, keyCode,
 581            modifierMask|numlockMask|LockMask|scrolllockMask,
 582            _root, True, GrabModeAsync, GrabModeAsync);
 583 }
 584
 585 void screen::ungrabKey(const KeyCode keyCode, const int modifierMask) const {
 586
 587   Display *display = _epist->getXDisplay();
 588   int numlockMask, scrolllockMask;
 589
 590   _epist->getLockModifiers(numlockMask, scrolllockMask);
 591
 592   XUngrabKey(display, keyCode, modifierMask, _root);
 593   XUngrabKey(display, keyCode, modifierMask|LockMask, _root);
 594   XUngrabKey(display, keyCode, modifierMask|scrolllockMask, _root);
 595   XUngrabKey(display, keyCode, modifierMask|numlockMask, _root);
 596   XUngrabKey(display, keyCode, modifierMask|LockMask|scrolllockMask, _root);
 597   XUngrabKey(display, keyCode, modifierMask|scrolllockMask|numlockMask, _root);
 598   XUngrabKey(display, keyCode, modifierMask|numlockMask|LockMask, _root);
 599   XUngrabKey(display, keyCode, modifierMask|numlockMask|LockMask|
 600              scrolllockMask, _root);
 601 }