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
  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::upWorkspace:
 226     changeWorkspaceVert(-1);
 227     return;
 228
 229   case Action::downWorkspace:
 230     changeWorkspaceVert(1);
 231     return;
 232
 233   case Action::leftWorkspace:
 234     changeWorkspaceHorz(-1);
 235     return;
 236
 237   case Action::rightWorkspace:
 238     changeWorkspaceHorz(1);
 239     return;
 240
 241   case Action::execute:
 242     execCommand(it->string());
 243     return;
 244
 245   default:
 246     break;
 247   }
 248
 249   // these actions require an active window
 250   if (_active != _clients.end()) {
 251     XWindow *window = *_active;
 252
 253     switch (it->type()) {
 254     case Action::iconify:
 255       window->iconify();
 256       return;
 257
 258     case Action::close:
 259       window->close();
 260       return;
 261
 262     case Action::raise:
 263       window->raise();
 264       return;
 265
 266     case Action::lower:
 267       window->lower();
 268       return;
 269
 270     case Action::sendToWorkspace:
 271       window->sendTo(it->number());
 272       return;
 273
 274     case Action::toggleomnipresent:
 275       if (window->desktop() == 0xffffffff)
 276         window->sendTo(_active_desktop);
 277       else
 278         window->sendTo(0xffffffff);
 279       return;
 280
 281     case Action::moveWindowUp:
 282       window->move(window->x(), window->y() - it->number());
 283       return;
 284
 285     case Action::moveWindowDown:
 286       window->move(window->x(), window->y() + it->number());
 287       return;
 288
 289     case Action::moveWindowLeft:
 290       window->move(window->x() - it->number(), window->y());
 291       return;
 292
 293     case Action::moveWindowRight:
 294       window->move(window->x() + it->number(), window->y());
 295       return;
 296
 297     case Action::resizeWindowWidth:
 298       window->resizeRel(it->number(), 0);
 299       return;
 300
 301     case Action::resizeWindowHeight:
 302       window->resizeRel(0, it->number());
 303       return;
 304
 305     case Action::toggleshade:
 306       window->shade(! window->shaded());
 307       return;
 308
 309     case Action::toggleMaximizeHorizontal:
 310       window->toggleMaximize(XWindow::Max_Horz);
 311       return;
 312
 313     case Action::toggleMaximizeVertical:
 314       window->toggleMaximize(XWindow::Max_Vert);
 315       return;
 316
 317     case Action::toggleMaximizeFull:
 318       window->toggleMaximize(XWindow::Max_Full);
 319       return;
 320
 321     default:
 322       assert(false);  // unhandled action type!
 323       break;
 324     }
 325   }
 326 }
 327
 328 // do we want to add this window to our list?
 329 bool screen::doAddWindow(Window window) const {
 330   assert(_managed);
 331
 332   Atom type;
 333   if (! _xatom->getValue(window, XAtom::net_wm_window_type, XAtom::atom,
 334                          type))
 335     return True;
 336
 337   if (type == _xatom->getAtom(XAtom::net_wm_window_type_dock) ||
 338       type == _xatom->getAtom(XAtom::net_wm_window_type_menu))
 339     return False;
 340
 341   return True;
 342 }
 343
 344
 345 void screen::updateEverything() {
 346   updateNumDesktops();
 347   updateActiveDesktop();
 348   updateClientList();
 349   updateActiveWindow();
 350 }
 351
 352
 353 void screen::updateNumDesktops() {
 354   assert(_managed);
 355
 356   if (! _xatom->getValue(_root, XAtom::net_number_of_desktops, XAtom::cardinal,
 357                          (unsigned long)_num_desktops))
 358     _num_desktops = 1;  // assume that there is at least 1 desktop!
 359 }
 360
 361
 362 void screen::updateActiveDesktop() {
 363   assert(_managed);
 364
 365   if (! _xatom->getValue(_root, XAtom::net_current_desktop, XAtom::cardinal,
 366                          (unsigned long)_active_desktop))
 367     _active_desktop = 0;  // there must be at least one desktop, and it must
 368                           // be the current one
 369 }
 370
 371
 372 void screen::updateClientList() {
 373   assert(_managed);
 374
 375   WindowList::iterator insert_point = _active;
 376   if (insert_point != _clients.end())
 377     ++insert_point; // get to the item client the focused client
 378
 379   // get the client list from the root window
 380   Window *rootclients = 0;
 381   unsigned long num = (unsigned) -1;
 382   if (! _xatom->getValue(_root, XAtom::net_client_list, XAtom::window, num,
 383                          &rootclients))
 384     num = 0;
 385
 386   WindowList::iterator it;
 387   const WindowList::iterator end = _clients.end();
 388   unsigned long i;
 389
 390   // insert new clients after the active window
 391   for (i = 0; i < num; ++i) {
 392     for (it = _clients.begin(); it != end; ++it)
 393       if (**it == rootclients[i])
 394         break;
 395     if (it == end) {  // didn't already exist
 396       if (doAddWindow(rootclients[i])) {
 397         //        cout << "Added window: 0x" << hex << rootclients[i] << dec << endl;
 398         _clients.insert(insert_point, new XWindow(_epist, this,
 399                                                   rootclients[i]));
 400       }
 401     }
 402   }
 403
 404   // remove clients that no longer exist (that belong to this screen)
 405   for (it = _clients.begin(); it != end;) {
 406     WindowList::iterator it2 = it;
 407     ++it;
 408
 409     // is on another screen?
 410     if ((*it2)->getScreen() != this)
 411       continue;
 412
 413     for (i = 0; i < num; ++i)
 414       if (**it2 == rootclients[i])
 415         break;
 416     if (i == num)  { // no longer exists
 417       //      cout << "Removed window: 0x" << hex << (*it2)->window() << dec << endl;
 418       // watch for the active and last-active window
 419       if (it2 == _active)
 420         _active = _clients.end();
 421       if (it2 == _last_active)
 422         _last_active = _clients.end();
 423       delete *it2;
 424       _clients.erase(it2);
 425     }
 426   }
 427
 428   if (rootclients) delete [] rootclients;
 429 }
 430
 431
 432 const XWindow *screen::lastActiveWindow() const {
 433   if (_last_active != _clients.end())
 434     return *_last_active;
 435
 436   // find a window if one exists
 437   WindowList::const_iterator it, end = _clients.end();
 438   for (it = _clients.begin(); it != end; ++it)
 439     if ((*it)->getScreen() == this && ! (*it)->iconic() &&
 440         ((*it)->desktop() == 0xffffffff || (*it)->desktop() == _active_desktop))
 441       return *it;
 442
 443   // no windows on this screen
 444   return 0;
 445 }
 446
 447
 448 void screen::updateActiveWindow() {
 449   assert(_managed);
 450
 451   Window a = None;
 452   _xatom->getValue(_root, XAtom::net_active_window, XAtom::window, a);
 453
 454   WindowList::iterator it, end = _clients.end();
 455   for (it = _clients.begin(); it != end; ++it) {
 456     if (**it == a) {
 457       if ((*it)->getScreen() != this)
 458         return;
 459       break;
 460     }
 461   }
 462   _active = it;
 463   if (it != end)
 464     _last_active = it;
 465
 466   /*  cout << "Active window is now: ";
 467       if (_active == _clients.end()) cout << "None\n";
 468       else cout << "0x" << hex << (*_active)->window() << dec << endl;
 469   */
 470 }
 471
 472
 473 void screen::execCommand(const string &cmd) const {
 474   pid_t pid;
 475   if ((pid = fork()) == 0) {
 476     // make the command run on the correct screen
 477     if (putenv(const_cast<char*>(_info->displayString().c_str()))) {
 478       cout << "warning: couldn't set environment variable 'DISPLAY'\n";
 479       perror("putenv()");
 480     }
 481     execl("/bin/sh", "sh", "-c", cmd.c_str(), NULL);
 482     exit(-1);
 483   } else if (pid == -1) {
 484     cout << _epist->getApplicationName() <<
 485       ": Could not fork a process for executing a command\n";
 486   }
 487 }
 488
 489
 490 void screen::cycleWindow(const bool forward, const int increment,
 491                          const bool allscreens, const bool alldesktops,
 492                          const bool sameclass, const string &cn) const {
 493   assert(_managed);
 494   assert(increment > 0);
 495
 496   if (_clients.empty()) return;
 497
 498   string classname(cn);
 499   if (sameclass && classname.empty() && _active != _clients.end())
 500     classname = (*_active)->appClass();
 501
 502   WindowList::const_iterator target = _active,
 503     begin = _clients.begin(),
 504     end = _clients.end();
 505
 506   const XWindow *t = 0;
 507
 508   for (int x = 0; x < increment; ++x) {
 509     while (1) {
 510       if (forward) {
 511         if (target == end) {
 512           target = begin;
 513         } else {
 514           ++target;
 515         }
 516       } else {
 517         if (target == begin)
 518           target = end;
 519         --target;
 520       }
 521
 522       // must be no window to focus
 523       if (target == _active)
 524         return;
 525
 526       // start back at the beginning of the loop
 527       if (target == end)
 528         continue;
 529
 530       // determine if this window is invalid for cycling to
 531       t = *target;
 532       if (t->iconic()) continue;
 533       if (! allscreens && t->getScreen() != this) continue;
 534       if (! alldesktops && ! (t->desktop() == _active_desktop ||
 535                               t->desktop() == 0xffffffff)) continue;
 536       if (sameclass && ! classname.empty() &&
 537           t->appClass() != classname) continue;
 538       if (! t->canFocus()) continue;
 539
 540       // found a good window so break out of the while, and perhaps continue
 541       // with the for loop
 542       break;
 543     }
 544   }
 545
 546   // phew. we found the window, so focus it.
 547   t->focus();
 548 }
 549
 550
 551 void screen::cycleWorkspace(const bool forward, const int increment,
 552                             const bool loop) const {
 553   assert(_managed);
 554   assert(increment > 0);
 555
 556   unsigned int destination = _active_desktop;
 557
 558   for (int x = 0; x < increment; ++x) {
 559     if (forward) {
 560       if (destination < _num_desktops - 1)
 561         ++destination;
 562       else if (loop)
 563         destination = 0;
 564     } else {
 565       if (destination > 0)
 566         --destination;
 567       else if (loop)
 568         destination = _num_desktops - 1;
 569     }
 570   }
 571
 572   if (destination != _active_desktop)
 573     changeWorkspace(destination);
 574 }
 575
 576
 577 void screen::changeWorkspace(const int num) const {
 578   assert(_managed);
 579
 580   _xatom->sendClientMessage(_root, XAtom::net_current_desktop, _root, num);
 581 }
 582
 583 void screen::changeWorkspaceVert(const int num) const {
 584   assert(_managed);
 585   const Config *conf = _epist->getConfig();
 586   int width = conf->getNumberValue(Config::workspaceColumns);
 587
 588   if (width > _num_desktops || width <= 0)
 589     return;
 590
 591   if (num < 0) {
 592     int wnum = _active_desktop - width;
 593     if (wnum >= 0)
 594       changeWorkspace(wnum);
 595   }
 596   else {
 597     int wnum = _active_desktop + width;
 598     if (wnum < _num_desktops)
 599       changeWorkspace(wnum);
 600   }
 601 }
 602
 603 void screen::changeWorkspaceHorz(const int num) const {
 604   assert(_managed);
 605   const Config *conf = _epist->getConfig();
 606   int width = conf->getNumberValue(Config::workspaceColumns);
 607
 608   if (width > _num_desktops || width <= 0)
 609     return;
 610
 611   if (num < 0) {
 612     if (_active_desktop % width != 0)
 613       changeWorkspace(_active_desktop - 1);
 614     else
 615       changeWorkspace(_active_desktop + width - 1);
 616   }
 617   else {
 618     if (_active_desktop % width != width - 1)
 619       changeWorkspace(_active_desktop + 1);
 620     else
 621       changeWorkspace(_active_desktop - width + 1);
 622   }
 623 }
 624
 625 void screen::grabKey(const KeyCode keyCode, const int modifierMask) const {
 626
 627   Display *display = _epist->getXDisplay();
 628   int numlockMask, scrolllockMask;
 629
 630   _epist->getLockModifiers(numlockMask, scrolllockMask);
 631
 632   XGrabKey(display, keyCode, modifierMask,
 633            _root, True, GrabModeAsync, GrabModeAsync);
 634   XGrabKey(display, keyCode,
 635            modifierMask|LockMask,
 636            _root, True, GrabModeAsync, GrabModeAsync);
 637   XGrabKey(display, keyCode,
 638            modifierMask|scrolllockMask,
 639            _root, True, GrabModeAsync, GrabModeAsync);
 640   XGrabKey(display, keyCode,
 641            modifierMask|numlockMask,
 642            _root, True, GrabModeAsync, GrabModeAsync);
 643
 644   XGrabKey(display, keyCode,
 645            modifierMask|LockMask|scrolllockMask,
 646            _root, True, GrabModeAsync, GrabModeAsync);
 647   XGrabKey(display, keyCode,
 648            modifierMask|scrolllockMask|numlockMask,
 649            _root, True, GrabModeAsync, GrabModeAsync);
 650   XGrabKey(display, keyCode,
 651            modifierMask|numlockMask|LockMask,
 652            _root, True, GrabModeAsync, GrabModeAsync);
 653
 654   XGrabKey(display, keyCode,
 655            modifierMask|numlockMask|LockMask|scrolllockMask,
 656            _root, True, GrabModeAsync, GrabModeAsync);
 657 }
 658
 659 void screen::ungrabKey(const KeyCode keyCode, const int modifierMask) const {
 660
 661   Display *display = _epist->getXDisplay();
 662   int numlockMask, scrolllockMask;
 663
 664   _epist->getLockModifiers(numlockMask, scrolllockMask);
 665
 666   XUngrabKey(display, keyCode, modifierMask, _root);
 667   XUngrabKey(display, keyCode, modifierMask|LockMask, _root);
 668   XUngrabKey(display, keyCode, modifierMask|scrolllockMask, _root);
 669   XUngrabKey(display, keyCode, modifierMask|numlockMask, _root);
 670   XUngrabKey(display, keyCode, modifierMask|LockMask|scrolllockMask, _root);
 671   XUngrabKey(display, keyCode, modifierMask|scrolllockMask|numlockMask, _root);
 672   XUngrabKey(display, keyCode, modifierMask|numlockMask|LockMask, _root);
 673   XUngrabKey(display, keyCode, modifierMask|numlockMask|LockMask|
 674              scrolllockMask, _root);
 675 }