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