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   cout << "root window on screen " << _number << ": 0x" << hex << _root <<
  64     dec << endl;
  65
  66   // find a window manager supporting NETWM, waiting for it to load if we must
  67   int count = 20;  // try for 20 seconds
  68   _managed = false;
  69   while (! (_epist->doShutdown() || _managed || count <= 0)) {
  70     if (! (_managed = findSupportingWM()))
  71       usleep(1000);
  72     --count;
  73   }
  74   if (_managed)
  75     cout << "Found compatible window manager '" << _wm_name << "' for screen "
  76       << _number << ".\n";
  77   else {
  78     cout << "Unable to find a compatible window manager for screen " <<
  79       _number << ".\n";
  80     return;
  81   }
  82
  83   XSelectInput(_epist->getXDisplay(), _root, PropertyChangeMask);
  84 }
  85
  86 screen::~screen() {
  87   if (_managed)
  88     XSelectInput(_epist->getXDisplay(), _root, None);
  89 }
  90
  91
  92 bool screen::findSupportingWM() {
  93   Window support_win;
  94   if (! _xatom->getValue(_root, XAtom::net_supporting_wm_check, XAtom::window,
  95                          support_win) || support_win == None)
  96     return false;
  97
  98   string title;
  99   _xatom->getValue(support_win, XAtom::net_wm_name, XAtom::utf8, title);
 100   _wm_name = title;
 101   return true;
 102 }
 103
 104
 105 XWindow *screen::findWindow(const XEvent &e) const {
 106   assert(_managed);
 107
 108   WindowList::const_iterator it, end = _clients.end();
 109   for (it = _clients.begin(); it != end; ++it)
 110     if (**it == e.xany.window)
 111       break;
 112   if(it == end)
 113     return 0;
 114   return *it;
 115 }
 116
 117
 118 void screen::processEvent(const XEvent &e) {
 119   assert(_managed);
 120   assert(e.xany.window == _root);
 121
 122   switch (e.type) {
 123   case PropertyNotify:
 124     // root window
 125     if (e.xproperty.atom == _xatom->getAtom(XAtom::net_number_of_desktops))
 126       updateNumDesktops();
 127     if (e.xproperty.atom == _xatom->getAtom(XAtom::net_current_desktop))
 128       updateActiveDesktop();
 129     if (e.xproperty.atom == _xatom->getAtom(XAtom::net_active_window))
 130       updateActiveWindow();
 131     if (e.xproperty.atom == _xatom->getAtom(XAtom::net_client_list)) {
 132       // catch any window unmaps first
 133       XEvent ev;
 134       if (XCheckTypedWindowEvent(_epist->getXDisplay(), e.xany.window,
 135                                  DestroyNotify, &ev) ||
 136           XCheckTypedWindowEvent(_epist->getXDisplay(), e.xany.window,
 137                                  UnmapNotify, &ev)) {
 138         processEvent(ev);
 139       }
 140
 141       updateClientList();
 142     }
 143     break;
 144   case KeyPress:
 145     handleKeypress(e);
 146     break;
 147   }
 148 }
 149
 150 void screen::handleKeypress(const XEvent &e) {
 151   int scrolllockMask, numlockMask;
 152
 153   ActionList::const_iterator it = _epist->actions().begin();
 154   ActionList::const_iterator end = _epist->actions().end();
 155
 156   _epist->getLockModifiers(numlockMask, scrolllockMask);
 157
 158   for (; it != end; ++it) {
 159     unsigned int state = e.xkey.state & ~(LockMask|scrolllockMask|numlockMask);
 160
 161     if (e.xkey.keycode == it->keycode() &&
 162         state == it->modifierMask()) {
 163       switch (it->type()) {
 164       case Action::nextScreen:
 165         _epist->cycleScreen(_number, true);
 166         return;
 167
 168       case Action::prevScreen:
 169         _epist->cycleScreen(_number, false);
 170         return;
 171
 172       case Action::nextWorkspace:
 173         cycleWorkspace(true);
 174         return;
 175
 176       case Action::prevWorkspace:
 177         cycleWorkspace(false);
 178         return;
 179
 180       case Action::nextWindow:
 181         cycleWindow(true);
 182         return;
 183
 184       case Action::prevWindow:
 185         cycleWindow(false);
 186         return;
 187
 188       case Action::nextWindowOnAllWorkspaces:
 189         cycleWindow(true, false, true);
 190         return;
 191
 192       case Action::prevWindowOnAllWorkspaces:
 193         cycleWindow(false, false, true);
 194         return;
 195
 196       case Action::nextWindowOnAllScreens:
 197         cycleWindow(true, true);
 198         return;
 199
 200       case Action::prevWindowOnAllScreens:
 201         cycleWindow(false, true);
 202         return;
 203
 204       case Action::nextWindowOfClass:
 205         cycleWindow(true, false, false, true, it->string());
 206         return;
 207
 208       case Action::prevWindowOfClass:
 209         cycleWindow(false, false, false, true, it->string());
 210         return;
 211
 212       case Action::nextWindowOfClassOnAllWorkspaces:
 213         cycleWindow(true, false, true, true, it->string());
 214         return;
 215
 216       case Action::prevWindowOfClassOnAllWorkspaces:
 217         cycleWindow(false, false, true, true, it->string());
 218         return;
 219
 220       case Action::changeWorkspace:
 221         changeWorkspace(it->number());
 222         return;
 223
 224       case Action::execute:
 225         execCommand(it->string());
 226         return;
 227
 228       default:
 229         break;
 230       }
 231
 232       // these actions require an active window
 233       if (_active != _clients.end()) {
 234         XWindow *window = *_active;
 235
 236         switch (it->type()) {
 237         case Action::iconify:
 238           window->iconify();
 239           return;
 240
 241         case Action::close:
 242           window->close();
 243           return;
 244
 245         case Action::raise:
 246           window->raise();
 247           return;
 248
 249         case Action::lower:
 250           window->lower();
 251           return;
 252
 253         case Action::sendToWorkspace:
 254           window->sendTo(it->number());
 255           return;
 256
 257         case Action::toggleomnipresent:
 258           if (window->desktop() == 0xffffffff)
 259             window->sendTo(_active_desktop);
 260           else
 261             window->sendTo(0xffffffff);
 262           return;
 263
 264         case Action::moveWindowUp:
 265           window->move(window->x(), window->y() - it->number());
 266           return;
 267
 268         case Action::moveWindowDown:
 269           window->move(window->x(), window->y() + it->number());
 270           return;
 271
 272         case Action::moveWindowLeft:
 273           window->move(window->x() - it->number(), window->y());
 274           return;
 275
 276         case Action::moveWindowRight:
 277           window->move(window->x() + it->number(), window->y());
 278           return;
 279
 280         case Action::resizeWindowWidth:
 281           window->resize(window->width() + it->number(), window->height());
 282           return;
 283
 284         case Action::resizeWindowHeight:
 285           window->resize(window->width(), window->height() + it->number());
 286           return;
 287
 288         case Action::toggleshade:
 289           window->shade(! window->shaded());
 290           return;
 291
 292         case Action::toggleMaximizeHorizontal:
 293           window->toggleMaximize(XWindow::Max_Horz);
 294           return;
 295
 296         case Action::toggleMaximizeVertical:
 297           window->toggleMaximize(XWindow::Max_Vert);
 298           return;
 299
 300         case Action::toggleMaximizeFull:
 301           window->toggleMaximize(XWindow::Max_Full);
 302           return;
 303
 304         default:
 305           assert(false);  // unhandled action type!
 306           break;
 307         }
 308       }
 309     }
 310   }
 311 }
 312
 313 // do we want to add this window to our list?
 314 bool screen::doAddWindow(Window window) const {
 315   assert(_managed);
 316
 317   Atom type;
 318   if (! _xatom->getValue(window, XAtom::net_wm_window_type, XAtom::atom,
 319                          type))
 320     return True;
 321
 322   if (type == _xatom->getAtom(XAtom::net_wm_window_type_dock) ||
 323       type == _xatom->getAtom(XAtom::net_wm_window_type_menu))
 324     return False;
 325
 326   return True;
 327 }
 328
 329
 330 void screen::updateEverything() {
 331   updateNumDesktops();
 332   updateActiveDesktop();
 333   updateClientList();
 334   updateActiveWindow();
 335 }
 336
 337
 338 void screen::updateNumDesktops() {
 339   assert(_managed);
 340
 341   if (! _xatom->getValue(_root, XAtom::net_number_of_desktops, XAtom::cardinal,
 342                          (unsigned long)_num_desktops))
 343     _num_desktops = 1;  // assume that there is at least 1 desktop!
 344 }
 345
 346
 347 void screen::updateActiveDesktop() {
 348   assert(_managed);
 349
 350   if (! _xatom->getValue(_root, XAtom::net_current_desktop, XAtom::cardinal,
 351                          (unsigned long)_active_desktop))
 352     _active_desktop = 0;  // there must be at least one desktop, and it must
 353                           // be the current one
 354 }
 355
 356
 357 void screen::updateClientList() {
 358   assert(_managed);
 359
 360   WindowList::iterator insert_point = _active;
 361   if (insert_point != _clients.end())
 362     ++insert_point; // get to the item client the focused client
 363
 364   // get the client list from the root window
 365   Window *rootclients = 0;
 366   unsigned long num = (unsigned) -1;
 367   if (! _xatom->getValue(_root, XAtom::net_client_list, XAtom::window, num,
 368                          &rootclients))
 369     num = 0;
 370
 371   WindowList::iterator it;
 372   const WindowList::iterator end = _clients.end();
 373   unsigned long i;
 374
 375   // insert new clients after the active window
 376   for (i = 0; i < num; ++i) {
 377     for (it = _clients.begin(); it != end; ++it)
 378       if (**it == rootclients[i])
 379         break;
 380     if (it == end) {  // didn't already exist
 381       if (doAddWindow(rootclients[i])) {
 382 //        cout << "Added window: 0x" << hex << rootclients[i] << dec << endl;
 383         _clients.insert(insert_point, new XWindow(_epist, this,
 384                                                   rootclients[i]));
 385       }
 386     }
 387   }
 388
 389   // remove clients that no longer exist (that belong to this screen)
 390   for (it = _clients.begin(); it != end;) {
 391     WindowList::iterator it2 = it;
 392     ++it;
 393
 394     // is on another screen?
 395     if ((*it2)->getScreen() != this)
 396       continue;
 397
 398     for (i = 0; i < num; ++i)
 399       if (**it2 == rootclients[i])
 400         break;
 401     if (i == num)  { // no longer exists
 402 //      cout << "Removed window: 0x" << hex << (*it2)->window() << dec << endl;
 403       // watch for the active and last-active window
 404       if (it2 == _active)
 405         _active = _clients.end();
 406       if (it2 == _last_active)
 407         _last_active = _clients.end();
 408       delete *it2;
 409       _clients.erase(it2);
 410     }
 411   }
 412
 413   if (rootclients) delete [] rootclients;
 414 }
 415
 416
 417 const XWindow *screen::lastActiveWindow() const {
 418   if (_last_active != _clients.end())
 419     return *_last_active;
 420
 421   // find a window if one exists
 422   WindowList::const_iterator it, end = _clients.end();
 423   for (it = _clients.begin(); it != end; ++it)
 424     if ((*it)->getScreen() == this)
 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   _last_active = it;
 448
 449 /*  cout << "Active window is now: ";
 450   if (_active == _clients.end()) cout << "None\n";
 451   else cout << "0x" << hex << (*_active)->window() << dec << endl;
 452 */
 453 }
 454
 455
 456 void screen::execCommand(const std::string &cmd) const {
 457   pid_t pid;
 458   if ((pid = fork()) == 0) {
 459     extern char **environ;
 460
 461     char *const argv[] = {
 462       "sh",
 463       "-c",
 464       const_cast<char *>(cmd.c_str()),
 465       0
 466     };
 467     // make the command run on the correct screen
 468     if (putenv(const_cast<char*>(_info->displayString().c_str()))) {
 469       cout << "warning: couldn't set environment variable 'DISPLAY'\n";
 470       perror("putenv()");
 471     }
 472     execve("/bin/sh", argv, environ);
 473     exit(127);
 474   } else if (pid == -1) {
 475     cout << _epist->getApplicationName() <<
 476       ": Could not fork a process for executing a command\n";
 477   }
 478 }
 479
 480
 481 void screen::cycleWindow(const bool forward, const bool allscreens,
 482                          const bool alldesktops, const bool sameclass,
 483                          const string &cn) const {
 484   assert(_managed);
 485
 486   if (_clients.empty()) return;
 487
 488   string classname(cn);
 489   if (sameclass && classname.empty() && _active != _clients.end())
 490     classname = (*_active)->appClass();
 491
 492   WindowList::const_iterator target = _active,
 493                              first = _active,
 494                              begin = _clients.begin(),
 495                              end = _clients.end();
 496
 497   do {
 498     if (forward) {
 499       if (target == end) {
 500         target = begin;
 501       } else {
 502         ++target;
 503         if (target == end)
 504           target = begin;
 505       }
 506     } else {
 507       if (target == begin)
 508         target = end;
 509       --target;
 510     }
 511
 512     // must be no window to focus
 513     if (target == first)
 514       return;
 515   } while ((*target)->iconic() ||
 516            (! allscreens && (*target)->getScreen() != this) ||
 517            (! alldesktops && (*target)->desktop() != _active_desktop) ||
 518            (sameclass && ! classname.empty() &&
 519             (*target)->appClass() != classname));
 520
 521   if (target != _clients.end())
 522     (*target)->focus();
 523 }
 524
 525
 526 void screen::cycleWorkspace(const bool forward, const bool loop) const {
 527   assert(_managed);
 528
 529   unsigned int destination = _active_desktop;
 530
 531   if (forward) {
 532     if (destination < _num_desktops - 1)
 533       ++destination;
 534     else if (loop)
 535       destination = 0;
 536   } else {
 537     if (destination > 0)
 538       --destination;
 539     else if (loop)
 540       destination = _num_desktops - 1;
 541   }
 542
 543   if (destination != _active_desktop)
 544     changeWorkspace(destination);
 545 }
 546
 547
 548 void screen::changeWorkspace(const int num) const {
 549   assert(_managed);
 550
 551   _xatom->sendClientMessage(_root, XAtom::net_current_desktop, _root, num);
 552 }
 553
 554 void screen::grabKey(const KeyCode keyCode, const int modifierMask) const {
 555
 556   Display *display = _epist->getXDisplay();
 557   int numlockMask, scrolllockMask;
 558
 559   _epist->getLockModifiers(numlockMask, scrolllockMask);
 560
 561   XGrabKey(display, keyCode, modifierMask,
 562            _root, True, GrabModeAsync, GrabModeAsync);
 563   XGrabKey(display, keyCode,
 564            modifierMask|LockMask,
 565            _root, True, GrabModeAsync, GrabModeAsync);
 566   XGrabKey(display, keyCode,
 567            modifierMask|scrolllockMask,
 568            _root, True, GrabModeAsync, GrabModeAsync);
 569   XGrabKey(display, keyCode,
 570            modifierMask|numlockMask,
 571            _root, True, GrabModeAsync, GrabModeAsync);
 572
 573   XGrabKey(display, keyCode,
 574            modifierMask|LockMask|scrolllockMask,
 575            _root, True, GrabModeAsync, GrabModeAsync);
 576   XGrabKey(display, keyCode,
 577            modifierMask|scrolllockMask|numlockMask,
 578            _root, True, GrabModeAsync, GrabModeAsync);
 579   XGrabKey(display, keyCode,
 580            modifierMask|numlockMask|LockMask,
 581            _root, True, GrabModeAsync, GrabModeAsync);
 582
 583   XGrabKey(display, keyCode,
 584            modifierMask|numlockMask|LockMask|scrolllockMask,
 585            _root, True, GrabModeAsync, GrabModeAsync);
 586 }