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