src/screen.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #ifdef HAVE_CONFIG_H
   4 # include "../config.h"
   5 #endif
   6
   7 extern "C" {
   8 #ifdef    HAVE_STDIO_H
   9 #  include <stdio.h>
  10 #endif // HAVE_STDIO_H
  11
  12 #ifdef    HAVE_STRING_H
  13 #  include <string.h>
  14 #endif // HAVE_STRING_H
  15
  16 #ifdef    HAVE_UNISTD_H
  17 #  include <sys/types.h>
  18 #  include <unistd.h>
  19 #endif // HAVE_UNISTD_H
  20
  21 #include "gettext.h"
  22 #define _(str) gettext(str)
  23 }
  24
  25 #include "screen.hh"
  26 #include "client.hh"
  27 #include "openbox.hh"
  28 #include "frame.hh"
  29 #include "bindings.hh"
  30 #include "python.hh"
  31 #include "otk/display.hh"
  32 #include "otk/property.hh"
  33
  34 #include <vector>
  35 #include <algorithm>
  36
  37 static bool running;
  38 static int anotherWMRunning(Display *display, XErrorEvent *) {
  39   printf(_("Another window manager already running on display %s.\n"),
  40          DisplayString(display));
  41   running = true;
  42   return -1;
  43 }
  44
  45
  46 namespace ob {
  47
  48
  49 Screen::Screen(int screen)
  50   : WidgetBase(WidgetBase::Type_Root),
  51     _number(screen),
  52     _style(screen, "")
  53 {
  54   assert(screen >= 0); assert(screen < ScreenCount(**otk::display));
  55   _info = otk::display->screenInfo(screen);
  56
  57   ::running = false;
  58   XErrorHandler old = XSetErrorHandler(::anotherWMRunning);
  59   XSelectInput(**otk::display, _info->rootWindow(),
  60                Screen::event_mask);
  61   XSync(**otk::display, false);
  62   XSetErrorHandler(old);
  63
  64   _managed = !::running;
  65   if (! _managed) return; // was unable to manage the screen
  66
  67   printf(_("Managing screen %d: visual 0x%lx, depth %d\n"),
  68          _number, XVisualIDFromVisual(_info->visual()), _info->depth());
  69
  70   otk::Property::set(_info->rootWindow(), otk::Property::atoms.openbox_pid,
  71                      otk::Property::atoms.cardinal, (unsigned long) getpid());
  72
  73   // set the mouse cursor for the root window (the default cursor)
  74   XDefineCursor(**otk::display, _info->rootWindow(),
  75                 openbox->cursors().session);
  76
  77   // XXX: initialize the screen's style
  78   /*
  79   otk::ustring stylepath;
  80   python_get_string("theme", &stylepath);
  81   otk::Configuration sconfig(false);
  82   sconfig.setFile(otk::expandTilde(stylepath.c_str()));
  83   if (!sconfig.load()) {
  84     sconfig.setFile(otk::expandTilde(DEFAULTSTYLE));
  85     if (!sconfig.load()) {
  86       printf(_("Unable to load default style: %s. Aborting.\n"), DEFAULTSTYLE);
  87       ::exit(1);
  88     }
  89   }
  90   _style.load(sconfig);
  91   */
  92   otk::display->renderControl(_number)->drawRoot(*_style.rootColor());
  93
  94   // set up notification of netwm support
  95   changeSupportedAtoms();
  96
  97   // Set the netwm properties for geometry
  98   unsigned long geometry[] = { _info->width(),
  99                                _info->height() };
 100   otk::Property::set(_info->rootWindow(),
 101                      otk::Property::atoms.net_desktop_geometry,
 102                      otk::Property::atoms.cardinal, geometry, 2);
 103
 104   // Set the net_desktop_names property
 105   std::vector<otk::ustring> names;
 106   python_get_stringlist("desktop_names", &names);
 107   otk::Property::set(_info->rootWindow(),
 108                      otk::Property::atoms.net_desktop_names,
 109                      otk::Property::utf8, names);
 110   // the above set() will cause the updateDesktopNames to fire right away so
 111   // we have a list of desktop names
 112
 113   if (!python_get_long("number_of_desktops", &_num_desktops))
 114     _num_desktops = 1;
 115   changeNumDesktops(_num_desktops); // set the hint
 116
 117   _desktop = 0;
 118   changeDesktop(0); // set the hint
 119
 120   // create the window which gets focus when no clients get it
 121   XSetWindowAttributes attr;
 122   attr.override_redirect = true;
 123   _focuswindow = XCreateWindow(**otk::display, _info->rootWindow(),
 124                                -100, -100, 1, 1, 0, 0, InputOnly,
 125                                _info->visual(), CWOverrideRedirect, &attr);
 126   XMapRaised(**otk::display, _focuswindow);
 127
 128   // these may be further updated if any pre-existing windows are found in
 129   // the manageExising() function
 130   changeClientList();  // initialize the client lists, which will be empty
 131   calcArea();          // initialize the available working area
 132
 133   // register this class as the event handler for the root window
 134   openbox->registerHandler(_info->rootWindow(), this);
 135
 136   // call the python Startup callbacks
 137   EventData data(_number, 0, EventAction::Startup, 0);
 138   openbox->bindings()->fireEvent(&data);
 139 }
 140
 141
 142 Screen::~Screen()
 143 {
 144   if (! _managed) return;
 145
 146   XSelectInput(**otk::display, _info->rootWindow(), NoEventMask);
 147
 148   // unmanage all windows
 149   while (!clients.empty())
 150     unmanageWindow(clients.front());
 151
 152   // call the python Shutdown callbacks
 153   EventData data(_number, 0, EventAction::Shutdown, 0);
 154   openbox->bindings()->fireEvent(&data);
 155
 156   XDestroyWindow(**otk::display, _focuswindow);
 157   XDestroyWindow(**otk::display, _supportwindow);
 158 }
 159
 160
 161 void Screen::manageExisting()
 162 {
 163   unsigned int i, j, nchild;
 164   Window r, p, *children;
 165   XQueryTree(**otk::display, _info->rootWindow(), &r, &p,
 166              &children, &nchild);
 167
 168   // preen the window list of all icon windows... for better dockapp support
 169   for (i = 0; i < nchild; i++) {
 170     if (children[i] == None) continue;
 171
 172     XWMHints *wmhints = XGetWMHints(**otk::display,
 173                                     children[i]);
 174
 175     if (wmhints) {
 176       if ((wmhints->flags & IconWindowHint) &&
 177           (wmhints->icon_window != children[i])) {
 178         for (j = 0; j < nchild; j++) {
 179           if (children[j] == wmhints->icon_window) {
 180             children[j] = None;
 181             break;
 182           }
 183         }
 184       }
 185
 186       XFree(wmhints);
 187     }
 188   }
 189
 190   // manage shown windows
 191   for (i = 0; i < nchild; ++i) {
 192     if (children[i] == None)
 193       continue;
 194
 195     XWindowAttributes attrib;
 196     if (XGetWindowAttributes(**otk::display, children[i], &attrib)) {
 197       if (attrib.override_redirect) continue;
 198
 199       if (attrib.map_state != IsUnmapped) {
 200         manageWindow(children[i]);
 201       }
 202     }
 203   }
 204
 205   XFree(children);
 206 }
 207
 208
 209 void Screen::updateStrut()
 210 {
 211   otk::Strut old = _strut;
 212   _strut.left = _strut.right = _strut.top = _strut.bottom = 0;
 213
 214   Client::List::iterator it, end = clients.end();
 215   for (it = clients.begin(); it != end; ++it) {
 216     const otk::Strut &s = (*it)->strut();
 217     _strut.left = std::max(_strut.left, s.left);
 218     _strut.right = std::max(_strut.right, s.right);
 219     _strut.top = std::max(_strut.top, s.top);
 220     _strut.bottom = std::max(_strut.bottom, s.bottom);
 221   }
 222   calcArea();
 223
 224   if (!(old == _strut)) {
 225     // the strut has changed, adjust all the maximized windows
 226     for (it = clients.begin(); it != end; ++it)
 227       (*it)->remaximize();
 228   }
 229 }
 230
 231
 232 void Screen::calcArea()
 233 {
 234 //  otk::Rect old_area = _area;
 235
 236 /*
 237 #ifdef    XINERAMA
 238   // reset to the full areas
 239   if (isXineramaActive())
 240     xineramaUsableArea = getXineramaAreas();
 241 #endif // XINERAMA
 242 */
 243
 244   _area.setRect(_strut.left, _strut.top,
 245                 _info->width() - (_strut.left + _strut.right),
 246                 _info->height() - (_strut.top + _strut.bottom));
 247
 248 /*
 249 #ifdef    XINERAMA
 250   if (isXineramaActive()) {
 251     // keep each of the ximerama-defined areas inside the strut
 252     RectList::iterator xit, xend = xineramaUsableArea.end();
 253     for (xit = xineramaUsableArea.begin(); xit != xend; ++xit) {
 254       if (xit->x() < usableArea.x()) {
 255         xit->setX(usableArea.x());
 256         xit->setWidth(xit->width() - usableArea.x());
 257       }
 258       if (xit->y() < usableArea.y()) {
 259         xit->setY(usableArea.y());
 260         xit->setHeight(xit->height() - usableArea.y());
 261       }
 262       if (xit->x() + xit->width() > usableArea.width())
 263         xit->setWidth(usableArea.width() - xit->x());
 264       if (xit->y() + xit->height() > usableArea.height())
 265         xit->setHeight(usableArea.height() - xit->y());
 266     }
 267   }
 268 #endif // XINERAMA
 269 */
 270
 271   //if (old_area != _area)
 272     // XXX: re-maximize windows
 273
 274   changeWorkArea();
 275 }
 276
 277
 278 void Screen::changeSupportedAtoms()
 279 {
 280   // create the netwm support window
 281   _supportwindow = XCreateSimpleWindow(**otk::display,
 282                                        _info->rootWindow(),
 283                                        0, 0, 1, 1, 0, 0, 0);
 284
 285   // set supporting window
 286   otk::Property::set(_info->rootWindow(),
 287                      otk::Property::atoms.net_supporting_wm_check,
 288                      otk::Property::atoms.window, _supportwindow);
 289
 290   //set properties on the supporting window
 291   otk::Property::set(_supportwindow, otk::Property::atoms.net_wm_name,
 292                      otk::Property::utf8, "Openbox");
 293   otk::Property::set(_supportwindow,
 294                      otk::Property::atoms.net_supporting_wm_check,
 295                      otk::Property::atoms.window, _supportwindow);
 296
 297
 298   Atom supported[] = {
 299     otk::Property::atoms.net_current_desktop,
 300     otk::Property::atoms.net_number_of_desktops,
 301     otk::Property::atoms.net_desktop_geometry,
 302     otk::Property::atoms.net_desktop_viewport,
 303     otk::Property::atoms.net_active_window,
 304     otk::Property::atoms.net_workarea,
 305     otk::Property::atoms.net_client_list,
 306     otk::Property::atoms.net_client_list_stacking,
 307     otk::Property::atoms.net_desktop_names,
 308     otk::Property::atoms.net_close_window,
 309     otk::Property::atoms.net_wm_name,
 310     otk::Property::atoms.net_wm_visible_name,
 311     otk::Property::atoms.net_wm_icon_name,
 312     otk::Property::atoms.net_wm_visible_icon_name,
 313 /*
 314     otk::Property::atoms.net_wm_desktop,
 315 */
 316     otk::Property::atoms.net_wm_strut,
 317     otk::Property::atoms.net_wm_window_type,
 318     otk::Property::atoms.net_wm_window_type_desktop,
 319     otk::Property::atoms.net_wm_window_type_dock,
 320     otk::Property::atoms.net_wm_window_type_toolbar,
 321     otk::Property::atoms.net_wm_window_type_menu,
 322     otk::Property::atoms.net_wm_window_type_utility,
 323     otk::Property::atoms.net_wm_window_type_splash,
 324     otk::Property::atoms.net_wm_window_type_dialog,
 325     otk::Property::atoms.net_wm_window_type_normal,
 326 /*
 327     otk::Property::atoms.net_wm_moveresize,
 328     otk::Property::atoms.net_wm_moveresize_size_topleft,
 329     otk::Property::atoms.net_wm_moveresize_size_topright,
 330     otk::Property::atoms.net_wm_moveresize_size_bottomleft,
 331     otk::Property::atoms.net_wm_moveresize_size_bottomright,
 332     otk::Property::atoms.net_wm_moveresize_move,
 333 */
 334     otk::Property::atoms.net_wm_allowed_actions,
 335     otk::Property::atoms.net_wm_action_move,
 336     otk::Property::atoms.net_wm_action_resize,
 337     otk::Property::atoms.net_wm_action_minimize,
 338     otk::Property::atoms.net_wm_action_shade,
 339 /*    otk::Property::atoms.net_wm_action_stick,*/
 340     otk::Property::atoms.net_wm_action_maximize_horz,
 341     otk::Property::atoms.net_wm_action_maximize_vert,
 342     otk::Property::atoms.net_wm_action_fullscreen,
 343     otk::Property::atoms.net_wm_action_change_desktop,
 344     otk::Property::atoms.net_wm_action_close,
 345
 346     otk::Property::atoms.net_wm_state,
 347     otk::Property::atoms.net_wm_state_modal,
 348     otk::Property::atoms.net_wm_state_maximized_vert,
 349     otk::Property::atoms.net_wm_state_maximized_horz,
 350     otk::Property::atoms.net_wm_state_shaded,
 351     otk::Property::atoms.net_wm_state_skip_taskbar,
 352     otk::Property::atoms.net_wm_state_skip_pager,
 353     otk::Property::atoms.net_wm_state_hidden,
 354     otk::Property::atoms.net_wm_state_fullscreen,
 355     otk::Property::atoms.net_wm_state_above,
 356     otk::Property::atoms.net_wm_state_below,
 357   };
 358   const int num_supported = sizeof(supported)/sizeof(Atom);
 359
 360   otk::Property::set(_info->rootWindow(), otk::Property::atoms.net_supported,
 361                      otk::Property::atoms.atom, supported, num_supported);
 362 }
 363
 364
 365 void Screen::changeClientList()
 366 {
 367   Window *windows;
 368   unsigned int size = clients.size();
 369
 370   // create an array of the window ids
 371   if (size > 0) {
 372     Window *win_it;
 373
 374     windows = new Window[size];
 375     win_it = windows;
 376     Client::List::const_iterator it = clients.begin();
 377     const Client::List::const_iterator end = clients.end();
 378     for (; it != end; ++it, ++win_it)
 379       *win_it = (*it)->window();
 380   } else
 381     windows = (Window*) 0;
 382
 383   otk::Property::set(_info->rootWindow(), otk::Property::atoms.net_client_list,
 384                      otk::Property::atoms.window, windows, size);
 385
 386   if (size)
 387     delete [] windows;
 388
 389   changeStackingList();
 390 }
 391
 392
 393 void Screen::changeStackingList()
 394 {
 395   Window *windows;
 396   unsigned int size = _stacking.size();
 397
 398   assert(size == clients.size()); // just making sure.. :)
 399
 400
 401   // create an array of the window ids (from bottom to top, reverse order!)
 402   if (size > 0) {
 403     Window *win_it;
 404
 405     windows = new Window[size];
 406     win_it = windows;
 407     Client::List::const_reverse_iterator it = _stacking.rbegin();
 408     const Client::List::const_reverse_iterator end = _stacking.rend();
 409     for (; it != end; ++it, ++win_it)
 410       *win_it = (*it)->window();
 411   } else
 412     windows = (Window*) 0;
 413
 414   otk::Property::set(_info->rootWindow(),
 415                      otk::Property::atoms.net_client_list_stacking,
 416                      otk::Property::atoms.window, windows, size);
 417
 418   if (size)
 419     delete [] windows;
 420 }
 421
 422
 423 void Screen::changeWorkArea() {
 424   unsigned long *dims = new unsigned long[4 * _num_desktops];
 425   for (long i = 0; i < _num_desktops; ++i) {
 426     // XXX: this could be different for each workspace
 427     dims[(i * 4) + 0] = _area.x();
 428     dims[(i * 4) + 1] = _area.y();
 429     dims[(i * 4) + 2] = _area.width();
 430     dims[(i * 4) + 3] = _area.height();
 431   }
 432   otk::Property::set(_info->rootWindow(), otk::Property::atoms.net_workarea,
 433                      otk::Property::atoms.cardinal, dims, 4 * _num_desktops);
 434   delete [] dims;
 435 }
 436
 437
 438 void Screen::manageWindow(Window window)
 439 {
 440   Client *client = 0;
 441   XWMHints *wmhint;
 442   XSetWindowAttributes attrib_set;
 443   XEvent e;
 444   XWindowAttributes attrib;
 445
 446   otk::display->grab();
 447
 448   // check if it has already been unmapped by the time we started mapping
 449   // the grab does a sync so we don't have to here
 450   if (XCheckTypedWindowEvent(**otk::display, window, DestroyNotify, &e) ||
 451       XCheckTypedWindowEvent(**otk::display, window, UnmapNotify, &e)) {
 452     XPutBackEvent(**otk::display, &e);
 453
 454     otk::display->ungrab();
 455     return; // don't manage it
 456   }
 457
 458   if (!XGetWindowAttributes(**otk::display, window, &attrib) ||
 459       attrib.override_redirect) {
 460     otk::display->ungrab();
 461     return; // don't manage it
 462   }
 463
 464   // is the window a docking app
 465   if ((wmhint = XGetWMHints(**otk::display, window))) {
 466     if ((wmhint->flags & StateHint) &&
 467         wmhint->initial_state == WithdrawnState) {
 468       //slit->addClient(w); // XXX: make dock apps work!
 469
 470       otk::display->ungrab();
 471       XFree(wmhint);
 472       return;
 473     }
 474     XFree(wmhint);
 475   }
 476
 477   // choose the events we want to receive on the CLIENT window
 478   attrib_set.event_mask = Client::event_mask;
 479   attrib_set.do_not_propagate_mask = Client::no_propagate_mask;
 480   XChangeWindowAttributes(**otk::display, window,
 481                           CWEventMask|CWDontPropagate, &attrib_set);
 482
 483   // create the Client class, which gets all of the hints on the window
 484   client = new Client(_number, window);
 485   // register for events
 486   openbox->registerHandler(window, client);
 487   // add to the wm's map
 488   openbox->addClient(window, client);
 489
 490   // we dont want a border on the client
 491   client->toggleClientBorder(false);
 492
 493   // specify that if we exit, the window should not be destroyed and should be
 494   // reparented back to root automatically
 495   XChangeSaveSet(**otk::display, window, SetModeInsert);
 496
 497   // create the decoration frame for the client window
 498   client->frame = new Frame(client, &_style);
 499   // register the plate for events (map req's)
 500   // this involves removing itself from the handler list first, since it is
 501   // auto added to the list, being a widget. we won't get any events on the
 502   // plate except for events for the client (SubstructureRedirectMask)
 503   openbox->clearHandler(client->frame->plate());
 504   openbox->registerHandler(client->frame->plate(), client);
 505
 506   // add to the wm's map
 507   openbox->addClient(client->frame->window(), client);
 508   openbox->addClient(client->frame->plate(), client);
 509   openbox->addClient(client->frame->titlebar(), client);
 510   openbox->addClient(client->frame->label(), client);
 511   openbox->addClient(client->frame->button_max(), client);
 512   openbox->addClient(client->frame->button_iconify(), client);
 513   openbox->addClient(client->frame->button_alldesk(), client);
 514   openbox->addClient(client->frame->button_close(), client);
 515   openbox->addClient(client->frame->handle(), client);
 516   openbox->addClient(client->frame->grip_left(), client);
 517   openbox->addClient(client->frame->grip_right(), client);
 518
 519   // reparent the client to the frame
 520   client->frame->grabClient();
 521
 522   if (openbox->state() != Openbox::State_Starting) {
 523     // position the window intelligenty .. hopefully :)
 524     // call the python PLACEWINDOW binding
 525     EventData data(_number, client, EventAction::PlaceWindow, 0);
 526     openbox->bindings()->fireEvent(&data);
 527   }
 528
 529   EventData ddata(_number, client, EventAction::DisplayingWindow, 0);
 530   openbox->bindings()->fireEvent(&ddata);
 531
 532   // if on the current desktop.. (or all desktops)
 533   if (client->desktop() == _desktop ||
 534       client->desktop() == (signed)0xffffffff) {
 535     client->frame->show();
 536   }
 537
 538   client->applyStartupState();
 539
 540   otk::display->ungrab();
 541
 542   // add to the screen's list
 543   clients.push_back(client);
 544   // once the client is in the list, update our strut to include the new
 545   // client's (it is good that this happens after window placement!)
 546   updateStrut();
 547   // this puts into the stacking order, then raises it
 548   _stacking.push_back(client);
 549   raiseWindow(client);
 550   // update the root properties
 551   changeClientList();
 552
 553   openbox->bindings()->grabButtons(true, client);
 554
 555   EventData ndata(_number, client, EventAction::NewWindow, 0);
 556   openbox->bindings()->fireEvent(&ndata);
 557
 558 #ifdef DEBUG
 559   printf("Managed window 0x%lx frame 0x%lx\n",
 560          window, client->frame->window());
 561 #endif
 562 }
 563
 564
 565 void Screen::unmanageWindow(Client *client)
 566 {
 567   Frame *frame = client->frame;
 568
 569   // call the python CLOSEWINDOW binding
 570   EventData data(_number, client, EventAction::CloseWindow, 0);
 571   openbox->bindings()->fireEvent(&data);
 572
 573   openbox->bindings()->grabButtons(false, client);
 574
 575   // remove from the wm's map
 576   openbox->removeClient(client->window());
 577   openbox->removeClient(frame->window());
 578   openbox->removeClient(frame->plate());
 579   openbox->removeClient(frame->titlebar());
 580   openbox->removeClient(frame->label());
 581   openbox->removeClient(frame->button_max());
 582   openbox->removeClient(frame->button_iconify());
 583   openbox->removeClient(frame->button_alldesk());
 584   openbox->removeClient(frame->button_close());
 585   openbox->removeClient(frame->handle());
 586   openbox->removeClient(frame->grip_left());
 587   openbox->removeClient(frame->grip_right());
 588   // unregister for handling events
 589   openbox->clearHandler(client->window());
 590
 591   // remove the window from our save set
 592   XChangeSaveSet(**otk::display, client->window(), SetModeDelete);
 593
 594   // we dont want events no more
 595   XSelectInput(**otk::display, client->window(), NoEventMask);
 596
 597   frame->hide();
 598
 599   // give the client its border back
 600   client->toggleClientBorder(true);
 601
 602   // reparent the window out of the frame
 603   frame->releaseClient();
 604
 605 #ifdef DEBUG
 606   Window framewin = client->frame->window();
 607 #endif
 608   delete client->frame;
 609   client->frame = 0;
 610
 611   // remove from the stacking order
 612   _stacking.remove(client);
 613
 614   // remove from the screen's list
 615   clients.remove(client);
 616
 617   // once the client is out of the list, update our strut to remove it's
 618   // influence
 619   updateStrut();
 620
 621   // unfocus the client (calls the focus callbacks)
 622   client->unfocus();
 623
 624 #ifdef DEBUG
 625   printf("Unmanaged window 0x%lx frame 0x%lx\n", client->window(), framewin);
 626 #endif
 627
 628   delete client;
 629
 630   // update the root properties
 631   changeClientList();
 632 }
 633
 634 void Screen::lowerWindow(Client *client)
 635 {
 636   Window wins[2];  // only ever restack 2 windows.
 637
 638   assert(!_stacking.empty()); // this would be bad
 639
 640   Client::List::iterator it = --_stacking.end();
 641   const Client::List::iterator end = _stacking.begin();
 642
 643   for (; it != end && (*it)->layer() < client->layer(); --it);
 644   if (*it == client) return;          // already the bottom, return
 645
 646   wins[0] = (*it)->frame->window();
 647   wins[1] = client->frame->window();
 648
 649   _stacking.remove(client);
 650   _stacking.insert(++it, client);
 651
 652   XRestackWindows(**otk::display, wins, 2);
 653   changeStackingList();
 654 }
 655
 656 void Screen::raiseWindow(Client *client)
 657 {
 658   Window wins[2];  // only ever restack 2 windows.
 659
 660   assert(!_stacking.empty()); // this would be bad
 661
 662   // remove the client before looking so we can't run into ourselves
 663   _stacking.remove(client);
 664
 665   Client::List::iterator it = _stacking.begin();
 666   const Client::List::iterator end = _stacking.end();
 667
 668   // the stacking list is from highest to lowest
 669   for (; it != end && (*it)->layer() > client->layer(); ++it);
 670
 671   /*
 672     if our new position is the top, we want to stack under the _focuswindow
 673     otherwise, we want to stack under the previous window in the stack.
 674   */
 675   wins[0] = (it == _stacking.begin() ? _focuswindow :
 676              ((*(--Client::List::const_iterator(it)))->frame->window()));
 677   wins[1] = client->frame->window();
 678
 679   _stacking.insert(it, client);
 680
 681   XRestackWindows(**otk::display, wins, 2);
 682   changeStackingList();
 683 }
 684
 685 void Screen::changeDesktop(long desktop)
 686 {
 687   if (!(desktop >= 0 && desktop < _num_desktops)) return;
 688
 689   printf("Moving to desktop %ld\n", desktop);
 690
 691   long old = _desktop;
 692
 693   _desktop = desktop;
 694   otk::Property::set(_info->rootWindow(),
 695                      otk::Property::atoms.net_current_desktop,
 696                      otk::Property::atoms.cardinal, _desktop);
 697
 698   if (old == _desktop) return;
 699
 700   Client::List::iterator it, end = clients.end();
 701   for (it = clients.begin(); it != end; ++it) {
 702     if ((*it)->desktop() == old) {
 703       (*it)->frame->hide();
 704     } else if ((*it)->desktop() == _desktop) {
 705       (*it)->frame->show();
 706     }
 707   }
 708
 709   // force the callbacks to fire
 710   if (!openbox->focusedClient())
 711     openbox->setFocusedClient(0);
 712 }
 713
 714 void Screen::changeNumDesktops(long num)
 715 {
 716   assert(num > 0);
 717
 718   if (!(num > 0)) return;
 719
 720   // XXX: move windows on desktops that will no longer exist!
 721
 722   _num_desktops = num;
 723   otk::Property::set(_info->rootWindow(),
 724                      otk::Property::atoms.net_number_of_desktops,
 725                      otk::Property::atoms.cardinal, _num_desktops);
 726
 727   // set the viewport hint
 728   unsigned long *viewport = new unsigned long[_num_desktops * 2];
 729   memset(viewport, 0, sizeof(unsigned long) * _num_desktops * 2);
 730   otk::Property::set(_info->rootWindow(),
 731                      otk::Property::atoms.net_desktop_viewport,
 732                      otk::Property::atoms.cardinal,
 733                      viewport, _num_desktops * 2);
 734   delete [] viewport;
 735
 736   // update the work area hint
 737   changeWorkArea();
 738 }
 739
 740
 741 void Screen::updateDesktopNames()
 742 {
 743   unsigned long num = (unsigned) -1;
 744
 745   if (!otk::Property::get(_info->rootWindow(),
 746                           otk::Property::atoms.net_desktop_names,
 747                           otk::Property::utf8, &num, &_desktop_names))
 748     _desktop_names.clear();
 749   while ((long)_desktop_names.size() < _num_desktops)
 750     _desktop_names.push_back("Unnamed");
 751 }
 752
 753
 754 void Screen::setDesktopName(long i, const otk::ustring &name)
 755 {
 756   assert(i >= 0);
 757
 758   if (i >= _num_desktops) return;
 759
 760   otk::Property::StringVect newnames = _desktop_names;
 761   newnames[i] = name;
 762   otk::Property::set(_info->rootWindow(),
 763                      otk::Property::atoms.net_desktop_names,
 764                      otk::Property::utf8, newnames);
 765 }
 766
 767
 768 void Screen::propertyHandler(const XPropertyEvent &e)
 769 {
 770   otk::EventHandler::propertyHandler(e);
 771
 772   // compress changes to a single property into a single change
 773   XEvent ce;
 774   while (XCheckTypedEvent(**otk::display, e.type, &ce)) {
 775     // XXX: it would be nice to compress ALL changes to a property, not just
 776     //      changes in a row without other props between.
 777     if (ce.xproperty.atom != e.atom) {
 778       XPutBackEvent(**otk::display, &ce);
 779       break;
 780     }
 781   }
 782
 783   if (e.atom == otk::Property::atoms.net_desktop_names)
 784     updateDesktopNames();
 785 }
 786
 787
 788 void Screen::clientMessageHandler(const XClientMessageEvent &e)
 789 {
 790   otk::EventHandler::clientMessageHandler(e);
 791
 792   if (e.format != 32) return;
 793
 794   if (e.message_type == otk::Property::atoms.net_current_desktop) {
 795     changeDesktop(e.data.l[0]);
 796   } else if (e.message_type == otk::Property::atoms.net_number_of_desktops) {
 797     changeNumDesktops(e.data.l[0]);
 798   }
 799   // XXX: so many client messages to handle here! ..or not.. they go to clients
 800 }
 801
 802
 803 void Screen::mapRequestHandler(const XMapRequestEvent &e)
 804 {
 805   otk::EventHandler::mapRequestHandler(e);
 806
 807 #ifdef    DEBUG
 808   printf("MapRequest for 0x%lx\n", e.window);
 809 #endif // DEBUG
 810
 811   Client *c = openbox->findClient(e.window);
 812   if (c) {
 813 #ifdef DEBUG
 814     printf("DEBUG: MAP REQUEST CAUGHT IN SCREEN. IGNORED.\n");
 815 #endif
 816   } else
 817     manageWindow(e.window);
 818 }
 819
 820 }