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   _epist = epist;
  55   _xatom = _epist->xatom();
  56   _number = number;
  57   _active = _clients.end();
  58   _info = _epist->getScreenInfo(_number);
  59   _root = _info->getRootWindow();
  60
  61   // find a window manager supporting NETWM, waiting for it to load if we must
  62   int count = 20;  // try for 20 seconds
  63   _managed = false;
  64   while (! (_epist->doShutdown() || _managed || count <= 0)) {
  65     if (! (_managed = findSupportingWM()))
  66       usleep(1000);
  67     --count;
  68   }
  69   if (_managed)
  70     cout << "Found compatible window manager '" << _wm_name << "' for screen "
  71       << _number << ".\n";
  72   else {
  73     cout << "Unable to find a compatible window manager for screen " <<
  74       _number << ".\n";
  75     return;
  76   }
  77
  78   XSelectInput(_epist->getXDisplay(), _root, PropertyChangeMask);
  79
  80   updateNumDesktops();
  81   updateActiveDesktop();
  82   updateClientList();
  83   updateActiveWindow();
  84 }
  85
  86
  87 screen::~screen() {
  88   if (_managed)
  89     XSelectInput(_epist->getXDisplay(), _root, None);
  90 }
  91
  92
  93 bool screen::findSupportingWM() {
  94   Window support_win;
  95   if (! _xatom->getValue(_root, XAtom::net_supporting_wm_check, XAtom::window,
  96                          support_win) || support_win == None)
  97     return false;
  98
  99   string title;
 100   _xatom->getValue(support_win, XAtom::net_wm_name, XAtom::utf8, title);
 101   _wm_name = title;
 102   return true;
 103 }
 104
 105
 106 XWindow *screen::findWindow(const XEvent &e) const {
 107   assert(_managed);
 108
 109   WindowList::const_iterator it, end = _clients.end();
 110   for (it = _clients.begin(); it != end; ++it)
 111     if (**it == e.xany.window)
 112       break;
 113   if(it == end)
 114     return 0;
 115   return *it;
 116 }
 117
 118
 119 void screen::processEvent(const XEvent &e) {
 120   assert(_managed);
 121   assert(e.xany.window == _root);
 122
 123   XWindow *window = 0;
 124   if (e.xany.window != _root) {
 125     window = findWindow(e);  // find the window
 126     assert(window); // we caught an event for a window we don't know about!?
 127   }
 128
 129   switch (e.type) {
 130   case PropertyNotify:
 131     // root window
 132     if (e.xproperty.atom == _xatom->getAtom(XAtom::net_number_of_desktops))
 133       updateNumDesktops();
 134     if (e.xproperty.atom == _xatom->getAtom(XAtom::net_current_desktop))
 135       updateActiveDesktop();
 136     if (e.xproperty.atom == _xatom->getAtom(XAtom::net_active_window))
 137       updateActiveWindow();
 138     if (e.xproperty.atom == _xatom->getAtom(XAtom::net_client_list)) {
 139       // catch any window unmaps first
 140       XEvent ev;
 141       if (XCheckTypedWindowEvent(_epist->getXDisplay(), e.xany.window,
 142                                  DestroyNotify, &ev) ||
 143           XCheckTypedWindowEvent(_epist->getXDisplay(), e.xany.window,
 144                                  UnmapNotify, &ev)) {
 145         processEvent(ev);
 146       }
 147
 148       updateClientList();
 149     }
 150     break;
 151   case KeyPress:
 152     handleKeypress(e);
 153     break;
 154   }
 155 }
 156
 157 void screen::handleKeypress(const XEvent &e) {
 158   int scrolllockMask, numlockMask;
 159
 160   ActionList::const_iterator it = _epist->actions().begin();
 161   ActionList::const_iterator end = _epist->actions().end();
 162
 163   _epist->getLockModifiers(numlockMask, scrolllockMask);
 164
 165   for (; it != end; ++it) {
 166     unsigned int state = e.xkey.state & ~(LockMask|scrolllockMask|numlockMask);
 167
 168     if (e.xkey.keycode == it->keycode() &&
 169         state == it->modifierMask()) {
 170       switch (it->type()) {
 171       case Action::nextWorkspace:
 172         cycleWorkspace(true);
 173         return;
 174
 175       case Action::prevWorkspace:
 176         cycleWorkspace(false);
 177         return;
 178
 179       case Action::nextWindow:
 180         cycleWindow(true);
 181         return;
 182
 183       case Action::prevWindow:
 184         cycleWindow(false);
 185         return;
 186
 187       case Action::nextWindowOnAllWorkspaces:
 188         cycleWindow(true, true);
 189         return;
 190
 191       case Action::prevWindowOnAllWorkspaces:
 192         cycleWindow(false, true);
 193         return;
 194
 195       case Action::nextWindowOfClass:
 196         cycleWindow(true, false, true, it->string());
 197         return;
 198
 199       case Action::prevWindowOfClass:
 200         cycleWindow(false, false, true, it->string());
 201         return;
 202
 203       case Action::nextWindowOfClassOnAllWorkspaces:
 204         cycleWindow(true, true, true, it->string());
 205         return;
 206
 207       case Action::prevWindowOfClassOnAllWorkspaces:
 208         cycleWindow(false, true, true, it->string());
 209         return;
 210
 211       case Action::changeWorkspace:
 212         changeWorkspace(it->number());
 213         return;
 214
 215       case Action::execute:
 216         execCommand(it->string());
 217         return;
 218
 219       default:
 220         break;
 221       }
 222
 223       // these actions require an active window
 224       if (_active != _clients.end()) {
 225         XWindow *window = *_active;
 226
 227         switch (it->type()) {
 228         case Action::iconify:
 229           window->iconify();
 230           return;
 231
 232         case Action::close:
 233           window->close();
 234           return;
 235
 236         case Action::raise:
 237           window->raise();
 238           return;
 239
 240         case Action::lower:
 241           window->lower();
 242           return;
 243
 244         case Action::sendToWorkspace:
 245           window->sendTo(it->number());
 246           return;
 247
 248         case Action::toggleomnipresent:
 249           if (window->desktop() == 0xffffffff)
 250             window->sendTo(_active_desktop);
 251           else
 252             window->sendTo(0xffffffff);
 253           return;
 254
 255         case Action::moveWindowUp:
 256           window->move(window->x(), window->y() - it->number());
 257           return;
 258
 259         case Action::moveWindowDown:
 260           window->move(window->x(), window->y() + it->number());
 261           return;
 262
 263         case Action::moveWindowLeft:
 264           window->move(window->x() - it->number(), window->y());
 265           return;
 266
 267         case Action::moveWindowRight:
 268           window->move(window->x() + it->number(), window->y());
 269           return;
 270
 271         case Action::resizeWindowWidth:
 272           window->resize(window->width() + it->number(), window->height());
 273           return;
 274
 275         case Action::resizeWindowHeight:
 276           window->resize(window->width(), window->height() + it->number());
 277           return;
 278
 279         case Action::toggleshade:
 280           window->shade(! window->shaded());
 281           return;
 282
 283         case Action::toggleMaximizeHorizontal:
 284           window->toggleMaximize(XWindow::Max_Horz);
 285           return;
 286
 287         case Action::toggleMaximizeVertical:
 288           window->toggleMaximize(XWindow::Max_Vert);
 289           return;
 290
 291         case Action::toggleMaximizeFull:
 292           window->toggleMaximize(XWindow::Max_Full);
 293           return;
 294
 295         default:
 296           assert(false);  // unhandled action type!
 297           break;
 298         }
 299       }
 300     }
 301   }
 302 }
 303
 304 // do we want to add this window to our list?
 305 bool screen::doAddWindow(Window window) const {
 306   assert(_managed);
 307
 308   Atom type;
 309   if (! _xatom->getValue(window, XAtom::net_wm_window_type, XAtom::atom,
 310                          type))
 311     return True;
 312
 313   if (type == _xatom->getAtom(XAtom::net_wm_window_type_dock) ||
 314       type == _xatom->getAtom(XAtom::net_wm_window_type_menu))
 315     return False;
 316
 317   return True;
 318 }
 319
 320
 321 void screen::updateNumDesktops() {
 322   assert(_managed);
 323
 324   if (! _xatom->getValue(_root, XAtom::net_number_of_desktops, XAtom::cardinal,
 325                          (unsigned long)_num_desktops))
 326     _num_desktops = 1;  // assume that there is at least 1 desktop!
 327 }
 328
 329
 330 void screen::updateActiveDesktop() {
 331   assert(_managed);
 332
 333   if (! _xatom->getValue(_root, XAtom::net_current_desktop, XAtom::cardinal,
 334                          (unsigned long)_active_desktop))
 335     _active_desktop = 0;  // there must be at least one desktop, and it must
 336                           // be the current one
 337 }
 338
 339
 340 void screen::updateClientList() {
 341   assert(_managed);
 342
 343   WindowList::iterator insert_point = _active;
 344   if (insert_point != _clients.end())
 345     ++insert_point; // get to the item client the focused client
 346
 347   // get the client list from the root window
 348   Window *rootclients = 0;
 349   unsigned long num = (unsigned) -1;
 350   if (! _xatom->getValue(_root, XAtom::net_client_list, XAtom::window, num,
 351                          &rootclients)) {
 352     while (! _clients.empty()) {
 353       delete _clients.front();
 354       _clients.erase(_clients.begin());
 355     }
 356     if (rootclients) delete [] rootclients;
 357     return;
 358   }
 359
 360   WindowList::iterator it, end = _clients.end();
 361   unsigned long i;
 362
 363   // insert new clients after the active window
 364   for (i = 0; i < num; ++i) {
 365     for (it = _clients.begin(); it != end; ++it)
 366       if (**it == rootclients[i])
 367         break;
 368     if (it == end) {  // didn't already exist
 369       if (doAddWindow(rootclients[i])) {
 370         //cout << "Added window: 0x" << hex << rootclients[i] << dec << endl;
 371         _clients.insert(insert_point, new XWindow(_epist, this,
 372                                                   rootclients[i]));
 373       }
 374     }
 375   }
 376
 377   // remove clients that no longer exist
 378   for (it = _clients.begin(); it != end;) {
 379     WindowList::iterator it2 = it++;
 380     for (i = 0; i < num; ++i)
 381       if (**it2 == rootclients[i])
 382         break;
 383     if (i == num)  { // no longer exists
 384       //cout << "Removed window: 0x" << hex << (*it2)->window() << dec << endl;
 385       delete *it2;
 386       _clients.erase(it2);
 387     }
 388   }
 389
 390   if (rootclients) delete [] rootclients;
 391 }
 392
 393
 394 void screen::updateActiveWindow() {
 395   assert(_managed);
 396
 397   Window a = None;
 398   _xatom->getValue(_root, XAtom::net_active_window, XAtom::window, a);
 399
 400   WindowList::iterator it, end = _clients.end();
 401   for (it = _clients.begin(); it != end; ++it) {
 402     if (**it == a)
 403       break;
 404   }
 405   _active = it;
 406
 407   //cout << "Active window is now: ";
 408   //if (_active == _clients.end()) cout << "None\n";
 409   //else cout << "0x" << hex << (*_active)->window() << dec << endl;
 410 }
 411
 412
 413 void screen::execCommand(const std::string &cmd) const {
 414   pid_t pid;
 415   if ((pid = fork()) == 0) {
 416     extern char **environ;
 417
 418     char *const argv[] = {
 419       "sh",
 420       "-c",
 421       const_cast<char *>(cmd.c_str()),
 422       0
 423     };
 424     // make the command run on the correct screen
 425     if (putenv(const_cast<char*>(_info->displayString().c_str()))) {
 426       cout << "warning: couldn't set environment variable 'DISPLAY'\n";
 427       perror("putenv()");
 428     }
 429     execve("/bin/sh", argv, environ);
 430     exit(127);
 431   } else if (pid == -1) {
 432     cout << _epist->getApplicationName() <<
 433       ": Could not fork a process for executing a command\n";
 434   }
 435 }
 436
 437
 438 void screen::cycleWindow(const bool forward, const bool alldesktops,
 439                          const bool sameclass, const string &cn) const {
 440   assert(_managed);
 441
 442   if (_clients.empty()) return;
 443
 444   WindowList::const_iterator target = _active;
 445
 446   string classname = cn;
 447   if (sameclass && classname.empty() && target != _clients.end())
 448     classname = (*target)->appClass();
 449
 450   if (target == _clients.end())
 451     target = _clients.begin();
 452
 453   do {
 454     if (forward) {
 455       ++target;
 456       if (target == _clients.end())
 457         target = _clients.begin();
 458     } else {
 459       if (target == _clients.begin())
 460         target = _clients.end();
 461       --target;
 462     }
 463   } while (target == _clients.end() ||
 464            (*target)->iconic() ||
 465            (! alldesktops && (*target)->desktop() != _active_desktop) ||
 466            (sameclass && ! classname.empty() &&
 467             (*target)->appClass() != classname));
 468
 469   if (target != _clients.end())
 470     (*target)->focus();
 471 }
 472
 473
 474 void screen::cycleWorkspace(const bool forward, const bool loop) const {
 475   assert(_managed);
 476
 477   unsigned int destination = _active_desktop;
 478
 479   if (forward) {
 480     if (destination < _num_desktops - 1)
 481       ++destination;
 482     else if (loop)
 483       destination = 0;
 484   } else {
 485     if (destination > 0)
 486       --destination;
 487     else if (loop)
 488       destination = _num_desktops - 1;
 489   }
 490
 491   if (destination != _active_desktop)
 492     changeWorkspace(destination);
 493 }
 494
 495
 496 void screen::changeWorkspace(const int num) const {
 497   assert(_managed);
 498
 499   _xatom->sendClientMessage(_root, XAtom::net_current_desktop, _root, num);
 500 }
 501
 502 void screen::grabKey(const KeyCode keyCode, const int modifierMask) const {
 503
 504   Display *display = _epist->getXDisplay();
 505   int numlockMask, scrolllockMask;
 506
 507   _epist->getLockModifiers(numlockMask, scrolllockMask);
 508
 509   XGrabKey(display, keyCode, modifierMask,
 510            _root, True, GrabModeAsync, GrabModeAsync);
 511   XGrabKey(display, keyCode,
 512            modifierMask|LockMask,
 513            _root, True, GrabModeAsync, GrabModeAsync);
 514   XGrabKey(display, keyCode,
 515            modifierMask|scrolllockMask,
 516            _root, True, GrabModeAsync, GrabModeAsync);
 517   XGrabKey(display, keyCode,
 518            modifierMask|numlockMask,
 519            _root, True, GrabModeAsync, GrabModeAsync);
 520
 521   XGrabKey(display, keyCode,
 522            modifierMask|LockMask|scrolllockMask,
 523            _root, True, GrabModeAsync, GrabModeAsync);
 524   XGrabKey(display, keyCode,
 525            modifierMask|scrolllockMask|numlockMask,
 526            _root, True, GrabModeAsync, GrabModeAsync);
 527   XGrabKey(display, keyCode,
 528            modifierMask|numlockMask|LockMask,
 529            _root, True, GrabModeAsync, GrabModeAsync);
 530
 531   XGrabKey(display, keyCode,
 532            modifierMask|numlockMask|LockMask|scrolllockMask,
 533            _root, True, GrabModeAsync, GrabModeAsync);
 534 }