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