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

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   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 #include "config.hh"
  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   _grabbed = true;
  63
  64   // find a window manager supporting NETWM, waiting for it to load if we must
  65   int count = 20;  // try for 20 seconds
  66   _managed = false;
  67   while (! (_epist->doShutdown() || _managed || count <= 0)) {
  68     if (! (_managed = findSupportingWM()))
  69       sleep(1);
  70     --count;
  71   }
  72   if (_managed)
  73     cout << "Found compatible window manager '" << _wm_name << "' for screen "
  74          << _number << ".\n";
  75   else {
  76     cout << "Unable to find a compatible window manager for screen " <<
  77       _number << ".\n";
  78     return;
  79   }
  80
  81   XSelectInput(_epist->getXDisplay(), _root, PropertyChangeMask);
  82 }
  83
  84 screen::~screen() {
  85   if (_managed)
  86     XSelectInput(_epist->getXDisplay(), _root, None);
  87 }
  88
  89
  90 bool screen::findSupportingWM() {
  91   Window support_win;
  92   if (! _xatom->getValue(_root, XAtom::net_supporting_wm_check, XAtom::window,
  93                          support_win) || support_win == None)
  94     return false;
  95
  96   string title;
  97   _xatom->getValue(support_win, XAtom::net_wm_name, XAtom::utf8, title);
  98   _wm_name = title;
  99   return true;
 100 }
 101
 102
 103 XWindow *screen::findWindow(const XEvent &e) const {
 104   assert(_managed);
 105
 106   WindowList::const_iterator it, end = _clients.end();
 107   for (it = _clients.begin(); it != end; ++it)
 108     if (**it == e.xany.window)
 109       break;
 110   if(it == end)
 111     return 0;
 112   return *it;
 113 }
 114
 115
 116 void screen::processEvent(const XEvent &e) {
 117   assert(_managed);
 118   assert(e.xany.window == _root);
 119
 120   switch (e.type) {
 121   case PropertyNotify:
 122     // root window
 123     if (e.xproperty.atom == _xatom->getAtom(XAtom::net_number_of_desktops))
 124       updateNumDesktops();
 125     else if (e.xproperty.atom == _xatom->getAtom(XAtom::net_current_desktop))
 126       updateActiveDesktop();
 127     else if (e.xproperty.atom == _xatom->getAtom(XAtom::net_active_window))
 128       updateActiveWindow();
 129     else if (e.xproperty.atom == _xatom->getAtom(XAtom::net_client_list)) {
 130       // catch any window unmaps first
 131       XEvent ev;
 132       if (XCheckTypedWindowEvent(_epist->getXDisplay(), e.xany.window,
 133                                  DestroyNotify, &ev) ||
 134           XCheckTypedWindowEvent(_epist->getXDisplay(), e.xany.window,
 135                                  UnmapNotify, &ev)) {
 136         processEvent(ev);
 137       }
 138
 139       updateClientList();
 140     }
 141     break;
 142   case KeyPress:
 143     handleKeypress(e);
 144     break;
 145   }
 146 }
 147
 148 void screen::handleKeypress(const XEvent &e) {
 149   int scrolllockMask, numlockMask;
 150   _epist->getLockModifiers(numlockMask, scrolllockMask);
 151
 152   // Mask out the lock modifiers. We want our keys to always work
 153   // This should be made an option
 154   unsigned int state = e.xkey.state & ~(LockMask|scrolllockMask|numlockMask);
 155   keytree &ktree = _epist->getKeyTree();
 156   const Action *it = ktree.getAction(e, state, this);
 157
 158   if (!it)
 159     return;
 160
 161   switch (it->type()) {
 162   case Action::nextScreen:
 163     _epist->cycleScreen(_number, true);
 164     return;
 165
 166   case Action::prevScreen:
 167     _epist->cycleScreen(_number, false);
 168     return;
 169
 170   case Action::nextWorkspace:
 171     cycleWorkspace(true, it->number() != 0 ? it->number(): 1);
 172     return;
 173
 174   case Action::prevWorkspace:
 175     cycleWorkspace(false, it->number() != 0 ? it->number(): 1);
 176     return;
 177
 178   case Action::nextWindow:
 179
 180     cycleWindow(true, it->number() != 0 ? it->number(): 1);
 181     return;
 182
 183   case Action::prevWindow:
 184     cycleWindow(false, it->number() != 0 ? it->number(): 1);
 185     return;
 186
 187   case Action::nextWindowOnAllWorkspaces:
 188     cycleWindow(true, it->number() != 0 ? it->number(): 1,  false, true);
 189     return;
 190
 191   case Action::prevWindowOnAllWorkspaces:
 192     cycleWindow(false, it->number() != 0 ? it->number(): 1, false, true);
 193     return;
 194
 195   case Action::nextWindowOnAllScreens:
 196     cycleWindow(true, it->number() != 0 ? it->number(): 1, true);
 197     return;
 198
 199   case Action::prevWindowOnAllScreens:
 200     cycleWindow(false, it->number() != 0 ? it->number(): 1, true);
 201     return;
 202
 203   case Action::nextWindowOfClass:
 204     cycleWindow(true, it->number() != 0 ? it->number(): 1,
 205                 false, false, true, it->string());
 206     return;
 207
 208   case Action::prevWindowOfClass:
 209     cycleWindow(false, it->number() != 0 ? it->number(): 1,
 210                 false, false, true, it->string());
 211     return;
 212
 213   case Action::nextWindowOfClassOnAllWorkspaces:
 214     cycleWindow(true, it->number() != 0 ? it->number(): 1,
 215                 false, true, true, it->string());
 216     return;
 217
 218   case Action::prevWindowOfClassOnAllWorkspaces:
 219     cycleWindow(false, it->number() != 0 ? it->number(): 1,
 220                 false, true, true, it->string());
 221     return;
 222
 223   case Action::changeWorkspace:
 224     changeWorkspace(it->number());
 225     return;
 226
 227   case Action::upWorkspace:
 228     changeWorkspaceVert(-1);
 229     return;
 230
 231   case Action::downWorkspace:
 232     changeWorkspaceVert(1);
 233     return;
 234
 235   case Action::leftWorkspace:
 236     changeWorkspaceHorz(-1);
 237     return;
 238
 239   case Action::rightWorkspace:
 240     changeWorkspaceHorz(1);
 241     return;
 242
 243   case Action::execute:
 244     execCommand(it->string());
 245     return;
 246
 247   case Action::showRootMenu:
 248     _xatom->sendClientMessage(rootWindow(), XAtom::openbox_show_root_menu,
 249                               None);
 250     return;
 251
 252   case Action::showWorkspaceMenu:
 253     _xatom->sendClientMessage(rootWindow(), XAtom::openbox_show_workspace_menu,
 254                               None);
 255     return;
 256
 257   case Action::toggleGrabs: {
 258     if (_grabbed) {
 259       ktree.ungrabDefaults(this);
 260       _grabbed = false;
 261     } else {
 262       ktree.grabDefaults(this);
 263       _grabbed = true;
 264     }
 265     return;
 266   }
 267
 268   default:
 269     break;
 270   }
 271
 272   // these actions require an active window
 273   if (_active != _clients.end()) {
 274     XWindow *window = *_active;
 275
 276     switch (it->type()) {
 277     case Action::iconify:
 278       window->iconify();
 279       return;
 280
 281     case Action::close:
 282       window->close();
 283       return;
 284
 285     case Action::raise:
 286       window->raise();
 287       return;
 288
 289     case Action::lower:
 290       window->lower();
 291       return;
 292
 293     case Action::sendToWorkspace:
 294       window->sendTo(it->number());
 295       return;
 296
 297     case Action::toggleOmnipresent:
 298       if (window->desktop() == 0xffffffff)
 299         window->sendTo(_active_desktop);
 300       else
 301         window->sendTo(0xffffffff);
 302       return;
 303
 304     case Action::moveWindowUp:
 305       window->move(window->x(), window->y() -
 306                    (it->number() != 0 ? it->number(): 1));
 307       return;
 308
 309     case Action::moveWindowDown:
 310       window->move(window->x(), window->y() +
 311                    (it->number() != 0 ? it->number(): 1));
 312       return;
 313
 314     case Action::moveWindowLeft:
 315       window->move(window->x() - (it->number() != 0 ? it->number(): 1),
 316                    window->y());
 317       return;
 318
 319     case Action::moveWindowRight:
 320       window->move(window->x() + (it->number() != 0 ? it->number(): 1),
 321                    window->y());
 322       return;
 323
 324     case Action::resizeWindowWidth:
 325       window->resizeRel(it->number(), 0);
 326       return;
 327
 328     case Action::resizeWindowHeight:
 329       window->resizeRel(0, it->number());
 330       return;
 331
 332     case Action::toggleShade:
 333       window->shade(! window->shaded());
 334       return;
 335
 336     case Action::toggleMaximizeHorizontal:
 337       window->toggleMaximize(XWindow::Max_Horz);
 338       return;
 339
 340     case Action::toggleMaximizeVertical:
 341       window->toggleMaximize(XWindow::Max_Vert);
 342       return;
 343
 344     case Action::toggleMaximizeFull:
 345       window->toggleMaximize(XWindow::Max_Full);
 346       return;
 347
 348     case Action::toggleDecorations:
 349       window->decorate(! window->decorated());
 350       return;
 351
 352     default:
 353       assert(false);  // unhandled action type!
 354       break;
 355     }
 356   }
 357 }
 358
 359 // do we want to add this window to our list?
 360 bool screen::doAddWindow(Window window) const {
 361   assert(_managed);
 362
 363   Atom type;
 364   if (! _xatom->getValue(window, XAtom::net_wm_window_type, XAtom::atom,
 365                          type))
 366     return True;
 367
 368   if (type == _xatom->getAtom(XAtom::net_wm_window_type_dock) ||
 369       type == _xatom->getAtom(XAtom::net_wm_window_type_menu))
 370     return False;
 371
 372   return True;
 373 }
 374
 375
 376 void screen::updateEverything() {
 377   updateNumDesktops();
 378   updateActiveDesktop();
 379   updateClientList();
 380   updateActiveWindow();
 381 }
 382
 383
 384 void screen::updateNumDesktops() {
 385   assert(_managed);
 386
 387   if (! _xatom->getValue(_root, XAtom::net_number_of_desktops, XAtom::cardinal,
 388                          (unsigned long)_num_desktops))
 389     _num_desktops = 1;  // assume that there is at least 1 desktop!
 390 }
 391
 392
 393 void screen::updateActiveDesktop() {
 394   assert(_managed);
 395
 396   if (! _xatom->getValue(_root, XAtom::net_current_desktop, XAtom::cardinal,
 397                          (unsigned long)_active_desktop))
 398     _active_desktop = 0;  // there must be at least one desktop, and it must
 399                           // be the current one
 400 }
 401
 402
 403 void screen::updateClientList() {
 404   assert(_managed);
 405
 406   WindowList::iterator insert_point = _active;
 407   if (insert_point != _clients.end())
 408     ++insert_point; // get to the item client the focused client
 409
 410   // get the client list from the root window
 411   Window *rootclients = 0;
 412   unsigned long num = (unsigned) -1;
 413   if (! _xatom->getValue(_root, XAtom::net_client_list, XAtom::window, num,
 414                          &rootclients))
 415     num = 0;
 416
 417   WindowList::iterator it;
 418   const WindowList::iterator end = _clients.end();
 419   unsigned long i;
 420
 421   // insert new clients after the active window
 422   for (i = 0; i < num; ++i) {
 423     for (it = _clients.begin(); it != end; ++it)
 424       if (**it == rootclients[i])
 425         break;
 426     if (it == end) {  // didn't already exist
 427       if (doAddWindow(rootclients[i])) {
 428         //        cout << "Added window: 0x" << hex << rootclients[i] << dec << endl;
 429         _clients.insert(insert_point, new XWindow(_epist, this,
 430                                                   rootclients[i]));
 431       }
 432     }
 433   }
 434
 435   // remove clients that no longer exist (that belong to this screen)
 436   for (it = _clients.begin(); it != end;) {
 437     WindowList::iterator it2 = it;
 438     ++it;
 439
 440     // is on another screen?
 441     if ((*it2)->getScreen() != this)
 442       continue;
 443
 444     for (i = 0; i < num; ++i)
 445       if (**it2 == rootclients[i])
 446         break;
 447     if (i == num)  { // no longer exists
 448       //      cout << "Removed window: 0x" << hex << (*it2)->window() << dec << endl;
 449       // watch for the active and last-active window
 450       if (it2 == _active)
 451         _active = _clients.end();
 452       if (it2 == _last_active)
 453         _last_active = _clients.end();
 454       delete *it2;
 455       _clients.erase(it2);
 456     }
 457   }
 458
 459   if (rootclients) delete [] rootclients;
 460 }
 461
 462
 463 const XWindow *screen::lastActiveWindow() const {
 464   if (_last_active != _clients.end())
 465     return *_last_active;
 466
 467   // find a window if one exists
 468   WindowList::const_iterator it, end = _clients.end();
 469   for (it = _clients.begin(); it != end; ++it)
 470     if ((*it)->getScreen() == this && ! (*it)->iconic() &&
 471         ((*it)->desktop() == 0xffffffff || (*it)->desktop() == _active_desktop))
 472       return *it;
 473
 474   // no windows on this screen
 475   return 0;
 476 }
 477
 478
 479 void screen::updateActiveWindow() {
 480   assert(_managed);
 481
 482   Window a = None;
 483   _xatom->getValue(_root, XAtom::net_active_window, XAtom::window, a);
 484
 485   WindowList::iterator it, end = _clients.end();
 486   for (it = _clients.begin(); it != end; ++it) {
 487     if (**it == a) {
 488       if ((*it)->getScreen() != this)
 489         return;
 490       break;
 491     }
 492   }
 493   _active = it;
 494   if (it != end)
 495     _last_active = it;
 496
 497   /*  cout << "Active window is now: ";
 498       if (_active == _clients.end()) cout << "None\n";
 499       else cout << "0x" << hex << (*_active)->window() << dec << endl;
 500   */
 501 }
 502
 503
 504 void screen::execCommand(const string &cmd) const {
 505   pid_t pid;
 506   if ((pid = fork()) == 0) {
 507     // make the command run on the correct screen
 508     if (putenv(const_cast<char*>(_info->displayString().c_str()))) {
 509       cout << "warning: couldn't set environment variable 'DISPLAY'\n";
 510       perror("putenv()");
 511     }
 512     execl("/bin/sh", "sh", "-c", cmd.c_str(), NULL);
 513     exit(-1);
 514   } else if (pid == -1) {
 515     cout << _epist->getApplicationName() <<
 516       ": Could not fork a process for executing a command\n";
 517   }
 518 }
 519
 520
 521 void screen::cycleWindow(const bool forward, const int increment,
 522                          const bool allscreens, const bool alldesktops,
 523                          const bool sameclass, const string &cn) const {
 524   assert(_managed);
 525   assert(increment > 0);
 526
 527   if (_clients.empty()) return;
 528
 529   string classname(cn);
 530   if (sameclass && classname.empty() && _active != _clients.end())
 531     classname = (*_active)->appClass();
 532
 533   WindowList::const_iterator target = _active,
 534     begin = _clients.begin(),
 535     end = _clients.end();
 536
 537   const XWindow *t = 0;
 538
 539   for (int x = 0; x < increment; ++x) {
 540     while (1) {
 541       if (forward) {
 542         if (target == end) {
 543           target = begin;
 544         } else {
 545           ++target;
 546         }
 547       } else {
 548         if (target == begin)
 549           target = end;
 550         --target;
 551       }
 552
 553       // must be no window to focus
 554       if (target == _active)
 555         return;
 556
 557       // start back at the beginning of the loop
 558       if (target == end)
 559         continue;
 560
 561       // determine if this window is invalid for cycling to
 562       t = *target;
 563       if (t->iconic()) continue;
 564       if (! allscreens && t->getScreen() != this) continue;
 565       if (! alldesktops && ! (t->desktop() == _active_desktop ||
 566                               t->desktop() == 0xffffffff)) continue;
 567       if (sameclass && ! classname.empty() &&
 568           t->appClass() != classname) continue;
 569       if (! t->canFocus()) continue;
 570
 571       // found a good window so break out of the while, and perhaps continue
 572       // with the for loop
 573       break;
 574     }
 575   }
 576
 577   // phew. we found the window, so focus it.
 578   t->focus();
 579 }
 580
 581
 582 void screen::cycleWorkspace(const bool forward, const int increment,
 583                             const bool loop) const {
 584   assert(_managed);
 585   assert(increment > 0);
 586
 587   unsigned int destination = _active_desktop;
 588
 589   for (int x = 0; x < increment; ++x) {
 590     if (forward) {
 591       if (destination < _num_desktops - 1)
 592         ++destination;
 593       else if (loop)
 594         destination = 0;
 595     } else {
 596       if (destination > 0)
 597         --destination;
 598       else if (loop)
 599         destination = _num_desktops - 1;
 600     }
 601   }
 602
 603   if (destination != _active_desktop)
 604     changeWorkspace(destination);
 605 }
 606
 607
 608 void screen::changeWorkspace(const int num) const {
 609   assert(_managed);
 610
 611   _xatom->sendClientMessage(_root, XAtom::net_current_desktop, _root, num);
 612 }
 613
 614 void screen::changeWorkspaceVert(const int num) const {
 615   assert(_managed);
 616   const Config *conf = _epist->getConfig();
 617   int width = conf->getNumberValue(Config::workspaceColumns);
 618   int num_desktops = (signed)_num_desktops;
 619   int active_desktop = (signed)_active_desktop;
 620   int wnum = 0;
 621
 622   if (width > num_desktops || width <= 0)
 623     return;
 624
 625   // a cookie to the person that makes this pretty
 626   if (num < 0) {
 627     wnum = active_desktop - width;
 628     if (wnum < 0) {
 629       wnum = num_desktops/width * width + active_desktop;
 630       if (wnum >= num_desktops)
 631         wnum = num_desktops - 1;
 632     }
 633   }
 634   else {
 635     wnum = active_desktop + width;
 636     if (wnum >= num_desktops) {
 637       wnum = (active_desktop + width) % num_desktops - 1;
 638       if (wnum < 0)
 639         wnum = 0;
 640     }
 641   }
 642   changeWorkspace(wnum);
 643 }
 644
 645 void screen::changeWorkspaceHorz(const int num) const {
 646   assert(_managed);
 647   const Config *conf = _epist->getConfig();
 648   int width = conf->getNumberValue(Config::workspaceColumns);
 649   int num_desktops = (signed)_num_desktops;
 650   int active_desktop = (signed)_active_desktop;
 651   int wnum = 0;
 652
 653   if (width > num_desktops || width <= 0)
 654     return;
 655
 656   if (num < 0) {
 657     if (active_desktop % width != 0)
 658       changeWorkspace(active_desktop - 1);
 659     else {
 660       wnum = active_desktop + width - 1;
 661       if (wnum >= num_desktops)
 662         wnum = num_desktops - 1;
 663     }
 664   }
 665   else {
 666     if (active_desktop % width != width - 1) {
 667       wnum = active_desktop + 1;
 668       if (wnum >= num_desktops)
 669         wnum = num_desktops / width * width;
 670     }
 671     else
 672       wnum = active_desktop - width + 1;
 673   }
 674   changeWorkspace(wnum);
 675 }
 676
 677 void screen::grabKey(const KeyCode keyCode, const int modifierMask) const {
 678
 679   Display *display = _epist->getXDisplay();
 680   int numlockMask, scrolllockMask;
 681
 682   _epist->getLockModifiers(numlockMask, scrolllockMask);
 683
 684   XGrabKey(display, keyCode, modifierMask,
 685            _root, True, GrabModeAsync, GrabModeAsync);
 686   XGrabKey(display, keyCode,
 687            modifierMask|LockMask,
 688            _root, True, GrabModeAsync, GrabModeAsync);
 689   XGrabKey(display, keyCode,
 690            modifierMask|scrolllockMask,
 691            _root, True, GrabModeAsync, GrabModeAsync);
 692   XGrabKey(display, keyCode,
 693            modifierMask|numlockMask,
 694            _root, True, GrabModeAsync, GrabModeAsync);
 695
 696   XGrabKey(display, keyCode,
 697            modifierMask|LockMask|scrolllockMask,
 698            _root, True, GrabModeAsync, GrabModeAsync);
 699   XGrabKey(display, keyCode,
 700            modifierMask|scrolllockMask|numlockMask,
 701            _root, True, GrabModeAsync, GrabModeAsync);
 702   XGrabKey(display, keyCode,
 703            modifierMask|numlockMask|LockMask,
 704            _root, True, GrabModeAsync, GrabModeAsync);
 705
 706   XGrabKey(display, keyCode,
 707            modifierMask|numlockMask|LockMask|scrolllockMask,
 708            _root, True, GrabModeAsync, GrabModeAsync);
 709 }
 710
 711 void screen::ungrabKey(const KeyCode keyCode, const int modifierMask) const {
 712
 713   Display *display = _epist->getXDisplay();
 714   int numlockMask, scrolllockMask;
 715
 716   _epist->getLockModifiers(numlockMask, scrolllockMask);
 717
 718   XUngrabKey(display, keyCode, modifierMask, _root);
 719   XUngrabKey(display, keyCode, modifierMask|LockMask, _root);
 720   XUngrabKey(display, keyCode, modifierMask|scrolllockMask, _root);
 721   XUngrabKey(display, keyCode, modifierMask|numlockMask, _root);
 722   XUngrabKey(display, keyCode, modifierMask|LockMask|scrolllockMask, _root);
 723   XUngrabKey(display, keyCode, modifierMask|scrolllockMask|numlockMask, _root);
 724   XUngrabKey(display, keyCode, modifierMask|numlockMask|LockMask, _root);
 725   XUngrabKey(display, keyCode, modifierMask|numlockMask|LockMask|
 726              scrolllockMask, _root);
 727 }