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
 150   ActionList::const_iterator it = _epist->actions().begin();
 151   ActionList::const_iterator end = _epist->actions().end();
 152
 153   _epist->getLockModifiers(numlockMask, scrolllockMask);
 154
 155   for (; it != end; ++it) {
 156     unsigned int state = e.xkey.state & ~(LockMask|scrolllockMask|numlockMask);
 157
 158     if (e.xkey.keycode == it->keycode() &&
 159         state == it->modifierMask()) {
 160       switch (it->type()) {
 161       case Action::nextScreen:
 162         _epist->cycleScreen(_number, true);
 163         return;
 164
 165       case Action::prevScreen:
 166         _epist->cycleScreen(_number, false);
 167         return;
 168
 169       case Action::nextWorkspace:
 170         cycleWorkspace(true);
 171         return;
 172
 173       case Action::prevWorkspace:
 174         cycleWorkspace(false);
 175         return;
 176
 177       case Action::nextWindow:
 178         cycleWindow(true);
 179         return;
 180
 181       case Action::prevWindow:
 182         cycleWindow(false);
 183         return;
 184
 185       case Action::nextWindowOnAllWorkspaces:
 186         cycleWindow(true, false, true);
 187         return;
 188
 189       case Action::prevWindowOnAllWorkspaces:
 190         cycleWindow(false, false, true);
 191         return;
 192
 193       case Action::nextWindowOnAllScreens:
 194         cycleWindow(true, true);
 195         return;
 196
 197       case Action::prevWindowOnAllScreens:
 198         cycleWindow(false, true);
 199         return;
 200
 201       case Action::nextWindowOfClass:
 202         cycleWindow(true, false, false, true, it->string());
 203         return;
 204
 205       case Action::prevWindowOfClass:
 206         cycleWindow(false, false, false, true, it->string());
 207         return;
 208
 209       case Action::nextWindowOfClassOnAllWorkspaces:
 210         cycleWindow(true, false, true, true, it->string());
 211         return;
 212
 213       case Action::prevWindowOfClassOnAllWorkspaces:
 214         cycleWindow(false, false, true, true, it->string());
 215         return;
 216
 217       case Action::changeWorkspace:
 218         changeWorkspace(it->number());
 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 }
 309
 310 // do we want to add this window to our list?
 311 bool screen::doAddWindow(Window window) const {
 312   assert(_managed);
 313
 314   Atom type;
 315   if (! _xatom->getValue(window, XAtom::net_wm_window_type, XAtom::atom,
 316                          type))
 317     return True;
 318
 319   if (type == _xatom->getAtom(XAtom::net_wm_window_type_dock) ||
 320       type == _xatom->getAtom(XAtom::net_wm_window_type_menu))
 321     return False;
 322
 323   return True;
 324 }
 325
 326
 327 void screen::updateEverything() {
 328   updateNumDesktops();
 329   updateActiveDesktop();
 330   updateClientList();
 331   updateActiveWindow();
 332 }
 333
 334
 335 void screen::updateNumDesktops() {
 336   assert(_managed);
 337
 338   if (! _xatom->getValue(_root, XAtom::net_number_of_desktops, XAtom::cardinal,
 339                          (unsigned long)_num_desktops))
 340     _num_desktops = 1;  // assume that there is at least 1 desktop!
 341 }
 342
 343
 344 void screen::updateActiveDesktop() {
 345   assert(_managed);
 346
 347   if (! _xatom->getValue(_root, XAtom::net_current_desktop, XAtom::cardinal,
 348                          (unsigned long)_active_desktop))
 349     _active_desktop = 0;  // there must be at least one desktop, and it must
 350                           // be the current one
 351 }
 352
 353
 354 void screen::updateClientList() {
 355   assert(_managed);
 356
 357   WindowList::iterator insert_point = _active;
 358   if (insert_point != _clients.end())
 359     ++insert_point; // get to the item client the focused client
 360
 361   // get the client list from the root window
 362   Window *rootclients = 0;
 363   unsigned long num = (unsigned) -1;
 364   if (! _xatom->getValue(_root, XAtom::net_client_list, XAtom::window, num,
 365                          &rootclients))
 366     num = 0;
 367
 368   WindowList::iterator it;
 369   const WindowList::iterator end = _clients.end();
 370   unsigned long i;
 371
 372   // insert new clients after the active window
 373   for (i = 0; i < num; ++i) {
 374     for (it = _clients.begin(); it != end; ++it)
 375       if (**it == rootclients[i])
 376         break;
 377     if (it == end) {  // didn't already exist
 378       if (doAddWindow(rootclients[i])) {
 379 //        cout << "Added window: 0x" << hex << rootclients[i] << dec << endl;
 380         _clients.insert(insert_point, new XWindow(_epist, this,
 381                                                   rootclients[i]));
 382       }
 383     }
 384   }
 385
 386   // remove clients that no longer exist (that belong to this screen)
 387   for (it = _clients.begin(); it != end;) {
 388     WindowList::iterator it2 = it;
 389     ++it;
 390
 391     // is on another screen?
 392     if ((*it2)->getScreen() != this)
 393       continue;
 394
 395     for (i = 0; i < num; ++i)
 396       if (**it2 == rootclients[i])
 397         break;
 398     if (i == num)  { // no longer exists
 399 //      cout << "Removed window: 0x" << hex << (*it2)->window() << dec << endl;
 400       // watch for the active and last-active window
 401       if (it2 == _active)
 402         _active = _clients.end();
 403       if (it2 == _last_active)
 404         _last_active = _clients.end();
 405       delete *it2;
 406       _clients.erase(it2);
 407     }
 408   }
 409
 410   if (rootclients) delete [] rootclients;
 411 }
 412
 413
 414 const XWindow *screen::lastActiveWindow() const {
 415   if (_last_active != _clients.end())
 416     return *_last_active;
 417
 418   // find a window if one exists
 419   WindowList::const_iterator it, end = _clients.end();
 420   for (it = _clients.begin(); it != end; ++it)
 421     if ((*it)->getScreen() == this && ! (*it)->iconic() &&
 422         ((*it)->desktop() == 0xffffffff || (*it)->desktop() == _active_desktop))
 423       return *it;
 424
 425   // no windows on this screen
 426   return 0;
 427 }
 428
 429
 430 void screen::updateActiveWindow() {
 431   assert(_managed);
 432
 433   Window a = None;
 434   _xatom->getValue(_root, XAtom::net_active_window, XAtom::window, a);
 435
 436   WindowList::iterator it, end = _clients.end();
 437   for (it = _clients.begin(); it != end; ++it) {
 438     if (**it == a) {
 439       if ((*it)->getScreen() != this)
 440         return;
 441       break;
 442     }
 443   }
 444   _active = it;
 445   if (it != end)
 446     _last_active = it;
 447
 448 /*  cout << "Active window is now: ";
 449   if (_active == _clients.end()) cout << "None\n";
 450   else cout << "0x" << hex << (*_active)->window() << dec << endl;
 451 */
 452 }
 453
 454
 455 void screen::execCommand(const string &cmd) const {
 456   pid_t pid;
 457   if ((pid = fork()) == 0) {
 458     extern char **environ;
 459
 460     char *const argv[] = {
 461       "sh",
 462       "-c",
 463       const_cast<char *>(cmd.c_str()),
 464       0
 465     };
 466     // make the command run on the correct screen
 467     if (putenv(const_cast<char*>(_info->displayString().c_str()))) {
 468       cout << "warning: couldn't set environment variable 'DISPLAY'\n";
 469       perror("putenv()");
 470     }
 471     execve("/bin/sh", argv, environ);
 472     exit(127);
 473   } else if (pid == -1) {
 474     cout << _epist->getApplicationName() <<
 475       ": Could not fork a process for executing a command\n";
 476   }
 477 }
 478
 479
 480 void screen::cycleWindow(const bool forward, const bool allscreens,
 481                          const bool alldesktops, const bool sameclass,
 482                          const string &cn) const {
 483   assert(_managed);
 484
 485   if (_clients.empty()) return;
 486
 487   string classname(cn);
 488   if (sameclass && classname.empty() && _active != _clients.end())
 489     classname = (*_active)->appClass();
 490
 491   WindowList::const_iterator target = _active,
 492                              begin = _clients.begin(),
 493                              end = _clients.end();
 494
 495   while (1) {
 496     if (forward) {
 497       if (target == end) {
 498         target = begin;
 499       } else {
 500         ++target;
 501         if (target == end)
 502           target = begin;
 503       }
 504     } else {
 505       if (target == begin)
 506         target = end;
 507       --target;
 508     }
 509
 510     // must be no window to focus
 511     if (target == _active)
 512       return;
 513
 514     // determine if this window is invalid for cycling to
 515     const XWindow *t = *target;
 516     if (t->iconic()) continue;
 517     if (! allscreens && t->getScreen() != this) continue;
 518     if (! alldesktops && ! (t->desktop() == _active_desktop ||
 519                             t->desktop() == 0xffffffff)) continue;
 520     if (sameclass && ! classname.empty() &&
 521         t->appClass() != classname) continue;
 522     if (! t->canFocus()) continue;
 523
 524     // found a good window!
 525     t->focus();
 526     return;
 527   }
 528 }
 529
 530
 531 void screen::cycleWorkspace(const bool forward, const bool loop) const {
 532   assert(_managed);
 533
 534   unsigned int destination = _active_desktop;
 535
 536   if (forward) {
 537     if (destination < _num_desktops - 1)
 538       ++destination;
 539     else if (loop)
 540       destination = 0;
 541   } else {
 542     if (destination > 0)
 543       --destination;
 544     else if (loop)
 545       destination = _num_desktops - 1;
 546   }
 547
 548   if (destination != _active_desktop)
 549     changeWorkspace(destination);
 550 }
 551
 552
 553 void screen::changeWorkspace(const int num) const {
 554   assert(_managed);
 555
 556   _xatom->sendClientMessage(_root, XAtom::net_current_desktop, _root, num);
 557 }
 558
 559 void screen::grabKey(const KeyCode keyCode, const int modifierMask) const {
 560
 561   Display *display = _epist->getXDisplay();
 562   int numlockMask, scrolllockMask;
 563
 564   _epist->getLockModifiers(numlockMask, scrolllockMask);
 565
 566   XGrabKey(display, keyCode, modifierMask,
 567            _root, True, GrabModeAsync, GrabModeAsync);
 568   XGrabKey(display, keyCode,
 569            modifierMask|LockMask,
 570            _root, True, GrabModeAsync, GrabModeAsync);
 571   XGrabKey(display, keyCode,
 572            modifierMask|scrolllockMask,
 573            _root, True, GrabModeAsync, GrabModeAsync);
 574   XGrabKey(display, keyCode,
 575            modifierMask|numlockMask,
 576            _root, True, GrabModeAsync, GrabModeAsync);
 577
 578   XGrabKey(display, keyCode,
 579            modifierMask|LockMask|scrolllockMask,
 580            _root, True, GrabModeAsync, GrabModeAsync);
 581   XGrabKey(display, keyCode,
 582            modifierMask|scrolllockMask|numlockMask,
 583            _root, True, GrabModeAsync, GrabModeAsync);
 584   XGrabKey(display, keyCode,
 585            modifierMask|numlockMask|LockMask,
 586            _root, True, GrabModeAsync, GrabModeAsync);
 587
 588   XGrabKey(display, keyCode,
 589            modifierMask|numlockMask|LockMask|scrolllockMask,
 590            _root, True, GrabModeAsync, GrabModeAsync);
 591 }