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::Shutdown, 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   _strut.left = _strut.right = _strut.top = _strut.bottom = 0;
 212
 213   Client::List::iterator it, end = clients.end();
 214   for (it = clients.begin(); it != end; ++it) {
 215     const otk::Strut &s = (*it)->strut();
 216     _strut.left = std::max(_strut.left, s.left);
 217     _strut.right = std::max(_strut.right, s.right);
 218     _strut.top = std::max(_strut.top, s.top);
 219     _strut.bottom = std::max(_strut.bottom, s.bottom);
 220   }
 221   calcArea();
 222 }
 223
 224
 225 void Screen::calcArea()
 226 {
 227 //  otk::Rect old_area = _area;
 228
 229 /*
 230 #ifdef    XINERAMA
 231   // reset to the full areas
 232   if (isXineramaActive())
 233     xineramaUsableArea = getXineramaAreas();
 234 #endif // XINERAMA
 235 */
 236
 237   _area.setRect(_strut.left, _strut.top,
 238                 _info->width() - (_strut.left + _strut.right),
 239                 _info->height() - (_strut.top + _strut.bottom));
 240
 241 /*
 242 #ifdef    XINERAMA
 243   if (isXineramaActive()) {
 244     // keep each of the ximerama-defined areas inside the strut
 245     RectList::iterator xit, xend = xineramaUsableArea.end();
 246     for (xit = xineramaUsableArea.begin(); xit != xend; ++xit) {
 247       if (xit->x() < usableArea.x()) {
 248         xit->setX(usableArea.x());
 249         xit->setWidth(xit->width() - usableArea.x());
 250       }
 251       if (xit->y() < usableArea.y()) {
 252         xit->setY(usableArea.y());
 253         xit->setHeight(xit->height() - usableArea.y());
 254       }
 255       if (xit->x() + xit->width() > usableArea.width())
 256         xit->setWidth(usableArea.width() - xit->x());
 257       if (xit->y() + xit->height() > usableArea.height())
 258         xit->setHeight(usableArea.height() - xit->y());
 259     }
 260   }
 261 #endif // XINERAMA
 262 */
 263
 264   //if (old_area != _area)
 265     // XXX: re-maximize windows
 266
 267   changeWorkArea();
 268 }
 269
 270
 271 void Screen::changeSupportedAtoms()
 272 {
 273   // create the netwm support window
 274   _supportwindow = XCreateSimpleWindow(**otk::display,
 275                                        _info->rootWindow(),
 276                                        0, 0, 1, 1, 0, 0, 0);
 277
 278   // set supporting window
 279   otk::Property::set(_info->rootWindow(),
 280                      otk::Property::atoms.net_supporting_wm_check,
 281                      otk::Property::atoms.window, _supportwindow);
 282
 283   //set properties on the supporting window
 284   otk::Property::set(_supportwindow, otk::Property::atoms.net_wm_name,
 285                      otk::Property::utf8, "Openbox");
 286   otk::Property::set(_supportwindow,
 287                      otk::Property::atoms.net_supporting_wm_check,
 288                      otk::Property::atoms.window, _supportwindow);
 289
 290
 291   Atom supported[] = {
 292     otk::Property::atoms.net_current_desktop,
 293     otk::Property::atoms.net_number_of_desktops,
 294     otk::Property::atoms.net_desktop_geometry,
 295     otk::Property::atoms.net_desktop_viewport,
 296     otk::Property::atoms.net_active_window,
 297     otk::Property::atoms.net_workarea,
 298     otk::Property::atoms.net_client_list,
 299     otk::Property::atoms.net_client_list_stacking,
 300     otk::Property::atoms.net_desktop_names,
 301     otk::Property::atoms.net_close_window,
 302     otk::Property::atoms.net_wm_name,
 303     otk::Property::atoms.net_wm_visible_name,
 304     otk::Property::atoms.net_wm_icon_name,
 305     otk::Property::atoms.net_wm_visible_icon_name,
 306 /*
 307     otk::Property::atoms.net_wm_desktop,
 308 */
 309     otk::Property::atoms.net_wm_strut,
 310     otk::Property::atoms.net_wm_window_type,
 311     otk::Property::atoms.net_wm_window_type_desktop,
 312     otk::Property::atoms.net_wm_window_type_dock,
 313     otk::Property::atoms.net_wm_window_type_toolbar,
 314     otk::Property::atoms.net_wm_window_type_menu,
 315     otk::Property::atoms.net_wm_window_type_utility,
 316     otk::Property::atoms.net_wm_window_type_splash,
 317     otk::Property::atoms.net_wm_window_type_dialog,
 318     otk::Property::atoms.net_wm_window_type_normal,
 319 /*
 320     otk::Property::atoms.net_wm_moveresize,
 321     otk::Property::atoms.net_wm_moveresize_size_topleft,
 322     otk::Property::atoms.net_wm_moveresize_size_topright,
 323     otk::Property::atoms.net_wm_moveresize_size_bottomleft,
 324     otk::Property::atoms.net_wm_moveresize_size_bottomright,
 325     otk::Property::atoms.net_wm_moveresize_move,
 326 */
 327     otk::Property::atoms.net_wm_allowed_actions,
 328     otk::Property::atoms.net_wm_action_move,
 329     otk::Property::atoms.net_wm_action_resize,
 330     otk::Property::atoms.net_wm_action_minimize,
 331     otk::Property::atoms.net_wm_action_shade,
 332 /*    otk::Property::atoms.net_wm_action_stick,*/
 333     otk::Property::atoms.net_wm_action_maximize_horz,
 334     otk::Property::atoms.net_wm_action_maximize_vert,
 335     otk::Property::atoms.net_wm_action_fullscreen,
 336     otk::Property::atoms.net_wm_action_change_desktop,
 337     otk::Property::atoms.net_wm_action_close,
 338
 339     otk::Property::atoms.net_wm_state,
 340     otk::Property::atoms.net_wm_state_modal,
 341     otk::Property::atoms.net_wm_state_maximized_vert,
 342     otk::Property::atoms.net_wm_state_maximized_horz,
 343     otk::Property::atoms.net_wm_state_shaded,
 344     otk::Property::atoms.net_wm_state_skip_taskbar,
 345     otk::Property::atoms.net_wm_state_skip_pager,
 346     otk::Property::atoms.net_wm_state_hidden,
 347     otk::Property::atoms.net_wm_state_fullscreen,
 348     otk::Property::atoms.net_wm_state_above,
 349     otk::Property::atoms.net_wm_state_below,
 350   };
 351   const int num_supported = sizeof(supported)/sizeof(Atom);
 352
 353   otk::Property::set(_info->rootWindow(), otk::Property::atoms.net_supported,
 354                      otk::Property::atoms.atom, supported, num_supported);
 355 }
 356
 357
 358 void Screen::changeClientList()
 359 {
 360   Window *windows;
 361   unsigned int size = clients.size();
 362
 363   // create an array of the window ids
 364   if (size > 0) {
 365     Window *win_it;
 366
 367     windows = new Window[size];
 368     win_it = windows;
 369     Client::List::const_iterator it = clients.begin();
 370     const Client::List::const_iterator end = clients.end();
 371     for (; it != end; ++it, ++win_it)
 372       *win_it = (*it)->window();
 373   } else
 374     windows = (Window*) 0;
 375
 376   otk::Property::set(_info->rootWindow(), otk::Property::atoms.net_client_list,
 377                      otk::Property::atoms.window, windows, size);
 378
 379   if (size)
 380     delete [] windows;
 381
 382   changeStackingList();
 383 }
 384
 385
 386 void Screen::changeStackingList()
 387 {
 388   Window *windows;
 389   unsigned int size = _stacking.size();
 390
 391   assert(size == clients.size()); // just making sure.. :)
 392
 393
 394   // create an array of the window ids (from bottom to top, reverse order!)
 395   if (size > 0) {
 396     Window *win_it;
 397
 398     windows = new Window[size];
 399     win_it = windows;
 400     Client::List::const_reverse_iterator it = _stacking.rbegin();
 401     const Client::List::const_reverse_iterator end = _stacking.rend();
 402     for (; it != end; ++it, ++win_it)
 403       *win_it = (*it)->window();
 404   } else
 405     windows = (Window*) 0;
 406
 407   otk::Property::set(_info->rootWindow(),
 408                      otk::Property::atoms.net_client_list_stacking,
 409                      otk::Property::atoms.window, windows, size);
 410
 411   if (size)
 412     delete [] windows;
 413 }
 414
 415
 416 void Screen::changeWorkArea() {
 417   unsigned long *dims = new unsigned long[4 * _num_desktops];
 418   for (long i = 0; i < _num_desktops; ++i) {
 419     // XXX: this could be different for each workspace
 420     dims[(i * 4) + 0] = _area.x();
 421     dims[(i * 4) + 1] = _area.y();
 422     dims[(i * 4) + 2] = _area.width();
 423     dims[(i * 4) + 3] = _area.height();
 424   }
 425   otk::Property::set(_info->rootWindow(), otk::Property::atoms.net_workarea,
 426                      otk::Property::atoms.cardinal, dims, 4 * _num_desktops);
 427   delete [] dims;
 428 }
 429
 430
 431 void Screen::manageWindow(Window window)
 432 {
 433   Client *client = 0;
 434   XWMHints *wmhint;
 435   XSetWindowAttributes attrib_set;
 436   XEvent e;
 437   XWindowAttributes attrib;
 438
 439   otk::display->grab();
 440
 441   // check if it has already been unmapped by the time we started mapping
 442   // the grab does a sync so we don't have to here
 443   if (XCheckTypedWindowEvent(**otk::display, window, DestroyNotify, &e) ||
 444       XCheckTypedWindowEvent(**otk::display, window, UnmapNotify, &e)) {
 445     XPutBackEvent(**otk::display, &e);
 446
 447     otk::display->ungrab();
 448     return; // don't manage it
 449   }
 450
 451   if (!XGetWindowAttributes(**otk::display, window, &attrib) ||
 452       attrib.override_redirect) {
 453     otk::display->ungrab();
 454     return; // don't manage it
 455   }
 456
 457   // is the window a docking app
 458   if ((wmhint = XGetWMHints(**otk::display, window))) {
 459     if ((wmhint->flags & StateHint) &&
 460         wmhint->initial_state == WithdrawnState) {
 461       //slit->addClient(w); // XXX: make dock apps work!
 462
 463       otk::display->ungrab();
 464       XFree(wmhint);
 465       return;
 466     }
 467     XFree(wmhint);
 468   }
 469
 470   // choose the events we want to receive on the CLIENT window
 471   attrib_set.event_mask = Client::event_mask;
 472   attrib_set.do_not_propagate_mask = Client::no_propagate_mask;
 473   XChangeWindowAttributes(**otk::display, window,
 474                           CWEventMask|CWDontPropagate, &attrib_set);
 475
 476   // create the Client class, which gets all of the hints on the window
 477   client = new Client(_number, window);
 478   // register for events
 479   openbox->registerHandler(window, client);
 480   // add to the wm's map
 481   openbox->addClient(window, client);
 482
 483   // we dont want a border on the client
 484   client->toggleClientBorder(false);
 485
 486   // specify that if we exit, the window should not be destroyed and should be
 487   // reparented back to root automatically
 488   XChangeSaveSet(**otk::display, window, SetModeInsert);
 489
 490   // create the decoration frame for the client window
 491   client->frame = new Frame(client, &_style);
 492   // register the plate for events (map req's)
 493   // this involves removing itself from the handler list first, since it is
 494   // auto added to the list, being a widget. we won't get any events on the
 495   // plate except for events for the client (SubstructureRedirectMask)
 496   openbox->clearHandler(client->frame->plate());
 497   openbox->registerHandler(client->frame->plate(), client);
 498
 499   // add to the wm's map
 500   openbox->addClient(client->frame->window(), client);
 501   openbox->addClient(client->frame->plate(), client);
 502   openbox->addClient(client->frame->titlebar(), client);
 503   openbox->addClient(client->frame->label(), client);
 504   openbox->addClient(client->frame->button_max(), client);
 505   openbox->addClient(client->frame->button_iconify(), client);
 506   openbox->addClient(client->frame->button_alldesk(), client);
 507   openbox->addClient(client->frame->button_close(), client);
 508   openbox->addClient(client->frame->handle(), client);
 509   openbox->addClient(client->frame->grip_left(), client);
 510   openbox->addClient(client->frame->grip_right(), client);
 511
 512   // reparent the client to the frame
 513   client->frame->grabClient();
 514
 515   if (!(openbox->state() == Openbox::State_Starting ||
 516         client->positionRequested())) {
 517     // position the window intelligenty .. hopefully :)
 518     // call the python PLACEWINDOW binding
 519     EventData data(_number, client, EventAction::PlaceWindow, 0);
 520     openbox->bindings()->fireEvent(&data);
 521   }
 522
 523   // if on the current desktop.. (or all desktops)
 524   if (client->desktop() == _desktop ||
 525       client->desktop() == (signed)0xffffffff) {
 526     client->frame->show();
 527   }
 528
 529   client->applyStartupState();
 530
 531   otk::display->ungrab();
 532
 533   // add to the screen's list
 534   clients.push_back(client);
 535   // this puts into the stacking order, then raises it
 536   _stacking.push_back(client);
 537   raiseWindow(client);
 538   // update the root properties
 539   changeClientList();
 540
 541   openbox->bindings()->grabButtons(true, client);
 542
 543   // call the python NEWWINDOW binding
 544   EventData data(_number, client, EventAction::NewWindow, 0);
 545   openbox->bindings()->fireEvent(&data);
 546
 547 #ifdef DEBUG
 548   printf("Managed window 0x%lx frame 0x%lx\n",
 549          window, client->frame->window());
 550 #endif
 551 }
 552
 553
 554 void Screen::unmanageWindow(Client *client)
 555 {
 556   Frame *frame = client->frame;
 557
 558   // call the python CLOSEWINDOW binding
 559   EventData data(_number, client, EventAction::CloseWindow, 0);
 560   openbox->bindings()->fireEvent(&data);
 561
 562   openbox->bindings()->grabButtons(false, client);
 563
 564   // remove from the wm's map
 565   openbox->removeClient(client->window());
 566   openbox->removeClient(frame->window());
 567   openbox->removeClient(frame->plate());
 568   openbox->removeClient(frame->titlebar());
 569   openbox->removeClient(frame->label());
 570   openbox->removeClient(frame->button_max());
 571   openbox->removeClient(frame->button_iconify());
 572   openbox->removeClient(frame->button_alldesk());
 573   openbox->removeClient(frame->button_close());
 574   openbox->removeClient(frame->handle());
 575   openbox->removeClient(frame->grip_left());
 576   openbox->removeClient(frame->grip_right());
 577   // unregister for handling events
 578   openbox->clearHandler(client->window());
 579
 580   // remove the window from our save set
 581   XChangeSaveSet(**otk::display, client->window(), SetModeDelete);
 582
 583   // we dont want events no more
 584   XSelectInput(**otk::display, client->window(), NoEventMask);
 585
 586   frame->hide();
 587
 588   // give the client its border back
 589   client->toggleClientBorder(true);
 590
 591   // reparent the window out of the frame
 592   frame->releaseClient();
 593
 594 #ifdef DEBUG
 595   Window framewin = client->frame->window();
 596 #endif
 597   delete client->frame;
 598   client->frame = 0;
 599
 600   // remove from the stacking order
 601   _stacking.remove(client);
 602
 603   // remove from the screen's list
 604   clients.remove(client);
 605
 606   // unfocus the client (calls the focus callbacks)
 607   client->unfocus();
 608
 609 #ifdef DEBUG
 610   printf("Unmanaged window 0x%lx frame 0x%lx\n", client->window(), framewin);
 611 #endif
 612
 613   delete client;
 614
 615   // update the root properties
 616   changeClientList();
 617 }
 618
 619 void Screen::lowerWindow(Client *client)
 620 {
 621   Window wins[2];  // only ever restack 2 windows.
 622
 623   assert(!_stacking.empty()); // this would be bad
 624
 625   Client::List::iterator it = --_stacking.end();
 626   const Client::List::iterator end = _stacking.begin();
 627
 628   for (; it != end && (*it)->layer() < client->layer(); --it);
 629   if (*it == client) return;          // already the bottom, return
 630
 631   wins[0] = (*it)->frame->window();
 632   wins[1] = client->frame->window();
 633
 634   _stacking.remove(client);
 635   _stacking.insert(++it, client);
 636
 637   XRestackWindows(**otk::display, wins, 2);
 638   changeStackingList();
 639 }
 640
 641 void Screen::raiseWindow(Client *client)
 642 {
 643   Window wins[2];  // only ever restack 2 windows.
 644
 645   assert(!_stacking.empty()); // this would be bad
 646
 647   // remove the client before looking so we can't run into ourselves
 648   _stacking.remove(client);
 649
 650   Client::List::iterator it = _stacking.begin();
 651   const Client::List::iterator end = _stacking.end();
 652
 653   // the stacking list is from highest to lowest
 654   for (; it != end && (*it)->layer() > client->layer(); ++it);
 655
 656   /*
 657     if our new position is the top, we want to stack under the _focuswindow
 658     otherwise, we want to stack under the previous window in the stack.
 659   */
 660   wins[0] = (it == _stacking.begin() ? _focuswindow :
 661              ((*(--Client::List::const_iterator(it)))->frame->window()));
 662   wins[1] = client->frame->window();
 663
 664   _stacking.insert(it, client);
 665
 666   XRestackWindows(**otk::display, wins, 2);
 667   changeStackingList();
 668 }
 669
 670 void Screen::changeDesktop(long desktop)
 671 {
 672   if (!(desktop >= 0 && desktop < _num_desktops)) return;
 673
 674   printf("Moving to desktop %ld\n", desktop);
 675
 676   long old = _desktop;
 677
 678   _desktop = desktop;
 679   otk::Property::set(_info->rootWindow(),
 680                      otk::Property::atoms.net_current_desktop,
 681                      otk::Property::atoms.cardinal, _desktop);
 682
 683   if (old == _desktop) return;
 684
 685   Client::List::iterator it, end = clients.end();
 686   for (it = clients.begin(); it != end; ++it) {
 687     if ((*it)->desktop() == old) {
 688       (*it)->frame->hide();
 689     } else if ((*it)->desktop() == _desktop) {
 690       (*it)->frame->show();
 691     }
 692   }
 693
 694   // force the callbacks to fire
 695   if (!openbox->focusedClient())
 696     openbox->setFocusedClient(0);
 697 }
 698
 699 void Screen::changeNumDesktops(long num)
 700 {
 701   assert(num > 0);
 702
 703   if (!(num > 0)) return;
 704
 705   // XXX: move windows on desktops that will no longer exist!
 706
 707   _num_desktops = num;
 708   otk::Property::set(_info->rootWindow(),
 709                      otk::Property::atoms.net_number_of_desktops,
 710                      otk::Property::atoms.cardinal, _num_desktops);
 711
 712   // set the viewport hint
 713   unsigned long *viewport = new unsigned long[_num_desktops * 2];
 714   memset(viewport, 0, sizeof(unsigned long) * _num_desktops * 2);
 715   otk::Property::set(_info->rootWindow(),
 716                      otk::Property::atoms.net_desktop_viewport,
 717                      otk::Property::atoms.cardinal,
 718                      viewport, _num_desktops * 2);
 719   delete [] viewport;
 720
 721   // update the work area hint
 722   changeWorkArea();
 723 }
 724
 725
 726 void Screen::updateDesktopNames()
 727 {
 728   unsigned long num = (unsigned) -1;
 729
 730   if (!otk::Property::get(_info->rootWindow(),
 731                           otk::Property::atoms.net_desktop_names,
 732                           otk::Property::utf8, &num, &_desktop_names))
 733     _desktop_names.clear();
 734   while ((long)_desktop_names.size() < _num_desktops)
 735     _desktop_names.push_back("Unnamed");
 736 }
 737
 738
 739 void Screen::setDesktopName(long i, const otk::ustring &name)
 740 {
 741   assert(i >= 0);
 742
 743   if (i >= _num_desktops) return;
 744
 745   otk::Property::StringVect newnames = _desktop_names;
 746   newnames[i] = name;
 747   otk::Property::set(_info->rootWindow(),
 748                      otk::Property::atoms.net_desktop_names,
 749                      otk::Property::utf8, newnames);
 750 }
 751
 752
 753 void Screen::propertyHandler(const XPropertyEvent &e)
 754 {
 755   otk::EventHandler::propertyHandler(e);
 756
 757   // compress changes to a single property into a single change
 758   XEvent ce;
 759   while (XCheckTypedEvent(**otk::display, e.type, &ce)) {
 760     // XXX: it would be nice to compress ALL changes to a property, not just
 761     //      changes in a row without other props between.
 762     if (ce.xproperty.atom != e.atom) {
 763       XPutBackEvent(**otk::display, &ce);
 764       break;
 765     }
 766   }
 767
 768   if (e.atom == otk::Property::atoms.net_desktop_names)
 769     updateDesktopNames();
 770 }
 771
 772
 773 void Screen::clientMessageHandler(const XClientMessageEvent &e)
 774 {
 775   otk::EventHandler::clientMessageHandler(e);
 776
 777   if (e.format != 32) return;
 778
 779   if (e.message_type == otk::Property::atoms.net_current_desktop) {
 780     changeDesktop(e.data.l[0]);
 781   } else if (e.message_type == otk::Property::atoms.net_number_of_desktops) {
 782     changeNumDesktops(e.data.l[0]);
 783   }
 784   // XXX: so many client messages to handle here! ..or not.. they go to clients
 785 }
 786
 787
 788 void Screen::mapRequestHandler(const XMapRequestEvent &e)
 789 {
 790   otk::EventHandler::mapRequestHandler(e);
 791
 792 #ifdef    DEBUG
 793   printf("MapRequest for 0x%lx\n", e.window);
 794 #endif // DEBUG
 795
 796   Client *c = openbox->findClient(e.window);
 797   if (c) {
 798 #ifdef DEBUG
 799     printf("DEBUG: MAP REQUEST CAUGHT IN SCREEN. IGNORED.\n");
 800 #endif
 801   } else
 802     manageWindow(e.window);
 803 }
 804
 805 }