openbox/screen.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    screen.c for the Openbox window manager
   4    Copyright (c) 2006        Mikael Magnusson
   5    Copyright (c) 2003-2007   Dana Jansens
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    See the COPYING file for a copy of the GNU General Public License.
  18 */
  19
  20 #include "debug.h"
  21 #include "openbox.h"
  22 #include "dock.h"
  23 #include "xerror.h"
  24 #include "prop.h"
  25 #include "grab.h"
  26 #include "startupnotify.h"
  27 #include "moveresize.h"
  28 #include "config.h"
  29 #include "screen.h"
  30 #include "composite.h"
  31 #include "client.h"
  32 #include "session.h"
  33 #include "frame.h"
  34 #include "event.h"
  35 #include "focus.h"
  36 #include "popup.h"
  37 #include "extensions.h"
  38 #include "render/render.h"
  39 #include "gettext.h"
  40
  41 #include <X11/Xlib.h>
  42 #ifdef HAVE_UNISTD_H
  43 #  include <sys/types.h>
  44 #  include <unistd.h>
  45 #endif
  46 #include <assert.h>
  47
  48 /*! The event mask to grab on the root window */
  49 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
  50                         EnterWindowMask | LeaveWindowMask | \
  51                         SubstructureRedirectMask | FocusChangeMask | \
  52                         ButtonPressMask | ButtonReleaseMask | ButtonMotionMask)
  53
  54 static gboolean screen_validate_layout(ObDesktopLayout *l);
  55 static gboolean replace_wm();
  56 static void     screen_tell_ksplash();
  57
  58 guint    screen_num_desktops;
  59 guint    screen_num_monitors;
  60 guint    screen_desktop;
  61 guint    screen_last_desktop;
  62 Size     screen_physical_size;
  63 gboolean screen_showing_desktop;
  64 ObDesktopLayout screen_desktop_layout;
  65 gchar  **screen_desktop_names;
  66 Window   screen_support_win;
  67 Time     screen_desktop_user_time = CurrentTime;
  68
  69 /*! An array of desktops, holding array of areas per monitor */
  70 static Rect  *monitor_area = NULL;
  71 /*! An array of desktops, holding an array of struts */
  72 static GSList *struts_top = NULL;
  73 static GSList *struts_left = NULL;
  74 static GSList *struts_right = NULL;
  75 static GSList *struts_bottom = NULL;
  76
  77 static ObPagerPopup *desktop_cycle_popup;
  78
  79 static gboolean replace_wm()
  80 {
  81     gchar *wm_sn;
  82     Atom wm_sn_atom;
  83     Window current_wm_sn_owner;
  84     Time timestamp;
  85
  86     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
  87     wm_sn_atom = XInternAtom(ob_display, wm_sn, FALSE);
  88     g_free(wm_sn);
  89
  90     current_wm_sn_owner = XGetSelectionOwner(ob_display, wm_sn_atom);
  91     if (current_wm_sn_owner == screen_support_win)
  92         current_wm_sn_owner = None;
  93     if (current_wm_sn_owner) {
  94         if (!ob_replace_wm) {
  95             g_message(_("A window manager is already running on screen %d"),
  96                       ob_screen);
  97             return FALSE;
  98         }
  99         xerror_set_ignore(TRUE);
 100         xerror_occured = FALSE;
 101
 102         /* We want to find out when the current selection owner dies */
 103         XSelectInput(ob_display, current_wm_sn_owner, StructureNotifyMask);
 104         XSync(ob_display, FALSE);
 105
 106         xerror_set_ignore(FALSE);
 107         if (xerror_occured)
 108             current_wm_sn_owner = None;
 109     }
 110
 111     {
 112         /* Generate a timestamp */
 113         XEvent event;
 114
 115         XSelectInput(ob_display, screen_support_win, PropertyChangeMask);
 116
 117         XChangeProperty(ob_display, screen_support_win,
 118                         prop_atoms.wm_class, prop_atoms.string,
 119                         8, PropModeAppend, NULL, 0);
 120         XWindowEvent(ob_display, screen_support_win,
 121                      PropertyChangeMask, &event);
 122
 123         XSelectInput(ob_display, screen_support_win, NoEventMask);
 124
 125         timestamp = event.xproperty.time;
 126     }
 127
 128     XSetSelectionOwner(ob_display, wm_sn_atom, screen_support_win,
 129                        timestamp);
 130
 131     if (XGetSelectionOwner(ob_display, wm_sn_atom) != screen_support_win) {
 132         g_message(_("Could not acquire window manager selection on screen %d"),
 133                   ob_screen);
 134         return FALSE;
 135     }
 136
 137     /* Wait for old window manager to go away */
 138     if (current_wm_sn_owner) {
 139       XEvent event;
 140       gulong wait = 0;
 141       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
 142
 143       while (wait < timeout) {
 144           if (XCheckWindowEvent(ob_display, current_wm_sn_owner,
 145                                 StructureNotifyMask, &event) &&
 146               event.type == DestroyNotify)
 147               break;
 148           g_usleep(G_USEC_PER_SEC / 10);
 149           wait += G_USEC_PER_SEC / 10;
 150       }
 151
 152       if (wait >= timeout) {
 153           g_message(_("The WM on screen %d is not exiting"), ob_screen);
 154           return FALSE;
 155       }
 156     }
 157
 158     /* Send client message indicating that we are now the WM */
 159     prop_message(RootWindow(ob_display, ob_screen), prop_atoms.manager,
 160                  timestamp, wm_sn_atom, screen_support_win, 0,
 161                  SubstructureNotifyMask);
 162
 163     return TRUE;
 164 }
 165
 166 gboolean screen_annex()
 167 {
 168     XSetWindowAttributes attrib;
 169     pid_t pid;
 170     gint i, num_support;
 171     Atom *prop_atoms_start, *wm_supported_pos;
 172     gulong *supported;
 173
 174     /* create the netwm support window */
 175     attrib.override_redirect = TRUE;
 176     screen_support_win = XCreateWindow(ob_display,
 177                                        RootWindow(ob_display, ob_screen),
 178                                        -100, -100, 1, 1, 0,
 179                                        CopyFromParent, InputOutput,
 180                                        CopyFromParent,
 181                                        CWOverrideRedirect, &attrib);
 182     XMapWindow(ob_display, screen_support_win);
 183     XLowerWindow(ob_display, screen_support_win);
 184
 185     if (!replace_wm()) {
 186         XDestroyWindow(ob_display, screen_support_win);
 187         return FALSE;
 188     }
 189
 190     xerror_set_ignore(TRUE);
 191     xerror_occured = FALSE;
 192     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 193                  ROOT_EVENTMASK);
 194     xerror_set_ignore(FALSE);
 195     if (xerror_occured) {
 196         g_message(_("A window manager is already running on screen %d"),
 197                   ob_screen);
 198
 199         XDestroyWindow(ob_display, screen_support_win);
 200         return FALSE;
 201     }
 202
 203     screen_set_root_cursor();
 204
 205     /* set the OPENBOX_PID hint */
 206     pid = getpid();
 207     PROP_SET32(RootWindow(ob_display, ob_screen),
 208                openbox_pid, cardinal, pid);
 209
 210     /* set supporting window */
 211     PROP_SET32(RootWindow(ob_display, ob_screen),
 212                net_supporting_wm_check, window, screen_support_win);
 213
 214     /* set properties on the supporting window */
 215     PROP_SETS(screen_support_win, net_wm_name, "Openbox");
 216     PROP_SET32(screen_support_win, net_supporting_wm_check,
 217                window, screen_support_win);
 218
 219     /* set the _NET_SUPPORTED_ATOMS hint */
 220
 221     /* this is all the atoms after net_supported in the prop_atoms struct */
 222     prop_atoms_start = (Atom*)&prop_atoms;
 223     wm_supported_pos = (Atom*)&(prop_atoms.net_supported);
 224     num_support = sizeof(prop_atoms) / sizeof(Atom) -
 225         (wm_supported_pos - prop_atoms_start) - 1;
 226     i = 0;
 227     supported = g_new(gulong, num_support);
 228     supported[i++] = prop_atoms.net_supporting_wm_check;
 229     supported[i++] = prop_atoms.net_wm_full_placement;
 230     supported[i++] = prop_atoms.net_current_desktop;
 231     supported[i++] = prop_atoms.net_number_of_desktops;
 232     supported[i++] = prop_atoms.net_desktop_geometry;
 233     supported[i++] = prop_atoms.net_desktop_viewport;
 234     supported[i++] = prop_atoms.net_active_window;
 235     supported[i++] = prop_atoms.net_workarea;
 236     supported[i++] = prop_atoms.net_client_list;
 237     supported[i++] = prop_atoms.net_client_list_stacking;
 238     supported[i++] = prop_atoms.net_desktop_names;
 239     supported[i++] = prop_atoms.net_close_window;
 240     supported[i++] = prop_atoms.net_desktop_layout;
 241     supported[i++] = prop_atoms.net_showing_desktop;
 242     supported[i++] = prop_atoms.net_wm_name;
 243     supported[i++] = prop_atoms.net_wm_visible_name;
 244     supported[i++] = prop_atoms.net_wm_icon_name;
 245     supported[i++] = prop_atoms.net_wm_visible_icon_name;
 246     supported[i++] = prop_atoms.net_wm_desktop;
 247     supported[i++] = prop_atoms.net_wm_strut;
 248     supported[i++] = prop_atoms.net_wm_strut_partial;
 249     supported[i++] = prop_atoms.net_wm_icon;
 250     supported[i++] = prop_atoms.net_wm_icon_geometry;
 251     supported[i++] = prop_atoms.net_wm_window_type;
 252     supported[i++] = prop_atoms.net_wm_window_type_desktop;
 253     supported[i++] = prop_atoms.net_wm_window_type_dock;
 254     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
 255     supported[i++] = prop_atoms.net_wm_window_type_menu;
 256     supported[i++] = prop_atoms.net_wm_window_type_utility;
 257     supported[i++] = prop_atoms.net_wm_window_type_splash;
 258     supported[i++] = prop_atoms.net_wm_window_type_dialog;
 259     supported[i++] = prop_atoms.net_wm_window_type_normal;
 260     supported[i++] = prop_atoms.net_wm_allowed_actions;
 261     supported[i++] = prop_atoms.net_wm_action_move;
 262     supported[i++] = prop_atoms.net_wm_action_resize;
 263     supported[i++] = prop_atoms.net_wm_action_minimize;
 264     supported[i++] = prop_atoms.net_wm_action_shade;
 265     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
 266     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
 267     supported[i++] = prop_atoms.net_wm_action_fullscreen;
 268     supported[i++] = prop_atoms.net_wm_action_change_desktop;
 269     supported[i++] = prop_atoms.net_wm_action_close;
 270     supported[i++] = prop_atoms.net_wm_action_above;
 271     supported[i++] = prop_atoms.net_wm_action_below;
 272     supported[i++] = prop_atoms.net_wm_state;
 273     supported[i++] = prop_atoms.net_wm_state_modal;
 274     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
 275     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
 276     supported[i++] = prop_atoms.net_wm_state_shaded;
 277     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
 278     supported[i++] = prop_atoms.net_wm_state_skip_pager;
 279     supported[i++] = prop_atoms.net_wm_state_hidden;
 280     supported[i++] = prop_atoms.net_wm_state_fullscreen;
 281     supported[i++] = prop_atoms.net_wm_state_above;
 282     supported[i++] = prop_atoms.net_wm_state_below;
 283     supported[i++] = prop_atoms.net_wm_state_demands_attention;
 284     supported[i++] = prop_atoms.net_moveresize_window;
 285     supported[i++] = prop_atoms.net_wm_moveresize;
 286     supported[i++] = prop_atoms.net_wm_user_time;
 287     supported[i++] = prop_atoms.net_wm_user_time_window;
 288     supported[i++] = prop_atoms.net_frame_extents;
 289     supported[i++] = prop_atoms.net_request_frame_extents;
 290     supported[i++] = prop_atoms.net_restack_window;
 291     supported[i++] = prop_atoms.net_startup_id;
 292 #ifdef SYNC
 293     supported[i++] = prop_atoms.net_wm_sync_request;
 294     supported[i++] = prop_atoms.net_wm_sync_request_counter;
 295 #endif
 296
 297     supported[i++] = prop_atoms.kde_wm_change_state;
 298     supported[i++] = prop_atoms.kde_net_wm_frame_strut;
 299     supported[i++] = prop_atoms.kde_net_wm_window_type_override;
 300
 301     supported[i++] = prop_atoms.ob_wm_action_undecorate;
 302     supported[i++] = prop_atoms.ob_wm_state_undecorated;
 303     supported[i++] = prop_atoms.openbox_pid;
 304     supported[i++] = prop_atoms.ob_theme;
 305     supported[i++] = prop_atoms.ob_control;
 306     g_assert(i == num_support);
 307
 308     PROP_SETA32(RootWindow(ob_display, ob_screen),
 309                 net_supported, atom, supported, num_support);
 310     g_free(supported);
 311
 312     screen_tell_ksplash();
 313
 314     return TRUE;
 315 }
 316
 317 static void screen_tell_ksplash()
 318 {
 319     XEvent e;
 320     char **argv;
 321
 322     argv = g_new(gchar*, 6);
 323     argv[0] = g_strdup("dcop");
 324     argv[1] = g_strdup("ksplash");
 325     argv[2] = g_strdup("ksplash");
 326     argv[3] = g_strdup("upAndRunning(QString)");
 327     argv[4] = g_strdup("wm started");
 328     argv[5] = NULL;
 329
 330     /* tell ksplash through the dcop server command line interface */
 331     g_spawn_async(NULL, argv, NULL,
 332                   G_SPAWN_SEARCH_PATH | G_SPAWN_DO_NOT_REAP_CHILD |
 333                   G_SPAWN_STDERR_TO_DEV_NULL | G_SPAWN_STDOUT_TO_DEV_NULL,
 334                   NULL, NULL, NULL, NULL);
 335     g_strfreev(argv);
 336
 337     /* i'm not sure why we do this, kwin does it, but ksplash doesn't seem to
 338        hear it anyways. perhaps it is for old ksplash. or new ksplash. or
 339        something. oh well. */
 340     e.xclient.type = ClientMessage;
 341     e.xclient.display = ob_display;
 342     e.xclient.window = RootWindow(ob_display, ob_screen);
 343     e.xclient.message_type =
 344         XInternAtom(ob_display, "_KDE_SPLASH_PROGRESS", False );
 345     e.xclient.format = 8;
 346     strcpy(e.xclient.data.b, "wm started");
 347     XSendEvent(ob_display, RootWindow(ob_display, ob_screen),
 348                False, SubstructureNotifyMask, &e );
 349 }
 350
 351 void screen_startup(gboolean reconfig)
 352 {
 353     gchar **names = NULL;
 354     guint32 d;
 355     gboolean namesexist = FALSE;
 356
 357     desktop_cycle_popup = pager_popup_new(FALSE);
 358     pager_popup_height(desktop_cycle_popup, POPUP_HEIGHT);
 359
 360     if (reconfig) {
 361         /* update the pager popup's width */
 362         pager_popup_text_width_to_strings(desktop_cycle_popup,
 363                                           screen_desktop_names,
 364                                           screen_num_desktops);
 365         return;
 366     }
 367
 368     /* get the initial size */
 369     screen_resize();
 370
 371     /* have names already been set for the desktops? */
 372     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 373                    net_desktop_names, utf8, &names))
 374     {
 375         g_strfreev(names);
 376         namesexist = TRUE;
 377     }
 378
 379     /* if names don't exist and we have session names, set those.
 380        do this stuff BEFORE setting the number of desktops, because that
 381        will create default names for them
 382     */
 383     if (!namesexist && session_desktop_names != NULL) {
 384         guint i, numnames;
 385         GSList *it;
 386
 387         /* get the desktop names */
 388         numnames = g_slist_length(session_desktop_names);
 389         names = g_new(gchar*, numnames + 1);
 390         names[numnames] = NULL;
 391         for (i = 0, it = session_desktop_names; it; ++i, it = g_slist_next(it))
 392             names[i] = g_strdup(it->data);
 393
 394         /* set the root window property */
 395         PROP_SETSS(RootWindow(ob_display, ob_screen), net_desktop_names,names);
 396
 397         g_strfreev(names);
 398     }
 399
 400     /* set the number of desktops, if it's not already set.
 401
 402        this will also set the default names from the config file up for
 403        desktops that don't have names yet */
 404     screen_num_desktops = 0;
 405     if (PROP_GET32(RootWindow(ob_display, ob_screen),
 406                    net_number_of_desktops, cardinal, &d))
 407         screen_set_num_desktops(d);
 408     /* restore from session if possible */
 409     else if (session_num_desktops)
 410         screen_set_num_desktops(session_num_desktops);
 411     else
 412         screen_set_num_desktops(config_desktops_num);
 413
 414     screen_desktop = screen_num_desktops;  /* something invalid */
 415     /* start on the current desktop when a wm was already running */
 416     if (PROP_GET32(RootWindow(ob_display, ob_screen),
 417                    net_current_desktop, cardinal, &d) &&
 418         d < screen_num_desktops)
 419     {
 420         screen_set_desktop(d, FALSE);
 421     } else if (session_desktop >= 0)
 422         screen_set_desktop(MIN((guint)session_desktop,
 423                                screen_num_desktops), FALSE);
 424     else
 425         screen_set_desktop(MIN(config_screen_firstdesk,
 426                                screen_num_desktops) - 1, FALSE);
 427     screen_last_desktop = screen_desktop;
 428
 429     /* don't start in showing-desktop mode */
 430     screen_showing_desktop = FALSE;
 431     PROP_SET32(RootWindow(ob_display, ob_screen),
 432                net_showing_desktop, cardinal, screen_showing_desktop);
 433
 434     if (session_desktop_layout_present &&
 435         screen_validate_layout(&session_desktop_layout))
 436     {
 437         screen_desktop_layout = session_desktop_layout;
 438     }
 439     else
 440         screen_update_layout();
 441 }
 442
 443 void screen_shutdown(gboolean reconfig)
 444 {
 445     pager_popup_free(desktop_cycle_popup);
 446
 447     if (reconfig)
 448         return;
 449
 450     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 451                  NoEventMask);
 452
 453     /* we're not running here no more! */
 454     PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 455     /* not without us */
 456     PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 457     /* don't keep this mode */
 458     PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 459
 460     XDestroyWindow(ob_display, screen_support_win);
 461
 462     g_strfreev(screen_desktop_names);
 463     screen_desktop_names = NULL;
 464 }
 465
 466 void screen_resize()
 467 {
 468     static gint oldw = 0, oldh = 0;
 469     gint w, h;
 470     GList *it;
 471     gulong geometry[2];
 472
 473     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 474     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 475
 476     if (w == oldw && h == oldh) return;
 477
 478     oldw = w; oldh = h;
 479
 480     /* Set the _NET_DESKTOP_GEOMETRY hint */
 481     screen_physical_size.width = geometry[0] = w;
 482     screen_physical_size.height = geometry[1] = h;
 483     PROP_SETA32(RootWindow(ob_display, ob_screen),
 484                 net_desktop_geometry, cardinal, geometry, 2);
 485
 486     if (ob_state() == OB_STATE_STARTING)
 487         return;
 488
 489     screen_update_areas();
 490     dock_configure();
 491
 492     for (it = client_list; it; it = g_list_next(it))
 493         client_move_onscreen(it->data, FALSE);
 494
 495     /* this needs to be setup whenever the root window's size changes */
 496     composite_setup_root_window();
 497 }
 498
 499 void screen_set_num_desktops(guint num)
 500 {
 501     guint old;
 502     gulong *viewport;
 503     GList *it, *stacking_copy;
 504
 505     g_assert(num > 0);
 506
 507     if (screen_num_desktops == num) return;
 508
 509     old = screen_num_desktops;
 510     screen_num_desktops = num;
 511     PROP_SET32(RootWindow(ob_display, ob_screen),
 512                net_number_of_desktops, cardinal, num);
 513
 514     /* set the viewport hint */
 515     viewport = g_new0(gulong, num * 2);
 516     PROP_SETA32(RootWindow(ob_display, ob_screen),
 517                 net_desktop_viewport, cardinal, viewport, num * 2);
 518     g_free(viewport);
 519
 520     /* the number of rows/columns will differ */
 521     screen_update_layout();
 522
 523     /* move windows on desktops that will no longer exist!
 524        make a copy of the list cuz we're changing it */
 525     stacking_copy = g_list_copy(stacking_list);
 526     for (it = g_list_last(stacking_copy); it; it = g_list_previous(it)) {
 527         if (WINDOW_IS_CLIENT(it->data)) {
 528             ObClient *c = it->data;
 529             if (c->desktop != DESKTOP_ALL && c->desktop >= num)
 530                 client_set_desktop(c, num - 1, FALSE, TRUE);
 531             /* raise all the windows that are on the current desktop which
 532                is being merged */
 533             else if (screen_desktop == num - 1 &&
 534                      (c->desktop == DESKTOP_ALL ||
 535                       c->desktop == screen_desktop))
 536                 stacking_raise(CLIENT_AS_WINDOW(c));
 537         }
 538     }
 539
 540     /* change our struts/area to match (after moving windows) */
 541     screen_update_areas();
 542
 543     /* may be some unnamed desktops that we need to fill in with names
 544      (after updating the areas so the popup can resize) */
 545     screen_update_desktop_names();
 546
 547     /* change our desktop if we're on one that no longer exists! */
 548     if (screen_desktop >= screen_num_desktops)
 549         screen_set_desktop(num - 1, TRUE);
 550 }
 551
 552 void screen_set_desktop(guint num, gboolean dofocus)
 553 {
 554     ObClient *c;
 555     GList *it;
 556     guint old;
 557     gulong ignore_start;
 558     gboolean allow_omni;
 559
 560     g_assert(num < screen_num_desktops);
 561
 562     old = screen_desktop;
 563     screen_desktop = num;
 564
 565     if (old == num) return;
 566
 567     PROP_SET32(RootWindow(ob_display, ob_screen),
 568                net_current_desktop, cardinal, num);
 569
 570     screen_last_desktop = old;
 571
 572     ob_debug("Moving to desktop %d\n", num+1);
 573
 574     /* ignore enter events caused by the move */
 575     ignore_start = event_start_ignore_all_enters();
 576
 577     if (moveresize_client)
 578         client_set_desktop(moveresize_client, num, TRUE, FALSE);
 579
 580     /* show windows before hiding the rest to lessen the enter/leave events */
 581
 582     /* show windows from top to bottom */
 583     for (it = stacking_list; it; it = g_list_next(it)) {
 584         if (WINDOW_IS_CLIENT(it->data)) {
 585             ObClient *c = it->data;
 586             client_show(c);
 587         }
 588     }
 589
 590     /* only allow omnipresent windows to get focus on desktop change if
 591        an omnipresent window is already focused (it'll keep focus probably, but
 592        maybe not depending on mouse-focus options) */
 593     allow_omni = focus_client && (client_normal(focus_client) &&
 594                                   focus_client->desktop == DESKTOP_ALL);
 595
 596     /* the client moved there already so don't move focus. prevent flicker
 597        on sendtodesktop + follow */
 598     if (focus_client && focus_client->desktop == screen_desktop)
 599         dofocus = FALSE;
 600
 601     /* have to try focus here because when you leave an empty desktop
 602        there is no focus out to watch for. also, we have different rules
 603        here. we always allow it to look under the mouse pointer if
 604        config_focus_last is FALSE
 605
 606        do this before hiding the windows so if helper windows are coming
 607        with us, they don't get hidden
 608     */
 609     if (dofocus && (c = focus_fallback(TRUE, !config_focus_last, allow_omni)))
 610     {
 611         /* only do the flicker reducing stuff ahead of time if we are going
 612            to call xsetinputfocus on the window ourselves. otherwise there is
 613            no guarantee the window will actually take focus.. */
 614         if (c->can_focus) {
 615             /* reduce flicker by hiliting now rather than waiting for the
 616                server FocusIn event */
 617             frame_adjust_focus(c->frame, TRUE);
 618             /* do this here so that if you switch desktops to a window with
 619                helper windows then the helper windows won't flash */
 620             client_bring_helper_windows(c);
 621         }
 622     }
 623
 624     /* hide windows from bottom to top */
 625     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 626         if (WINDOW_IS_CLIENT(it->data)) {
 627             ObClient *c = it->data;
 628             client_hide(c);
 629         }
 630     }
 631
 632     event_end_ignore_all_enters(ignore_start);
 633
 634     if (event_curtime != CurrentTime)
 635         screen_desktop_user_time = event_curtime;
 636 }
 637
 638 void screen_add_desktop(gboolean current)
 639 {
 640     screen_set_num_desktops(screen_num_desktops+1);
 641
 642     /* move all the clients over */
 643     if (current) {
 644         GList *it;
 645
 646         for (it = client_list; it; it = g_list_next(it)) {
 647             ObClient *c = it->data;
 648             if (c->desktop != DESKTOP_ALL && c->desktop >= screen_desktop)
 649                 client_set_desktop(c, c->desktop+1, FALSE, TRUE);
 650         }
 651     }
 652 }
 653
 654 void screen_remove_desktop(gboolean current)
 655 {
 656     guint rmdesktop, movedesktop;
 657     GList *it, *stacking_copy;
 658
 659     if (screen_num_desktops <= 1) return;
 660
 661     /* what desktop are we removing and moving to? */
 662     if (current)
 663         rmdesktop = screen_desktop;
 664     else
 665         rmdesktop = screen_num_desktops - 1;
 666     if (rmdesktop < screen_num_desktops - 1)
 667         movedesktop = rmdesktop + 1;
 668     else
 669         movedesktop = rmdesktop;
 670
 671     /* make a copy of the list cuz we're changing it */
 672     stacking_copy = g_list_copy(stacking_list);
 673     for (it = g_list_last(stacking_copy); it; it = g_list_previous(it)) {
 674         if (WINDOW_IS_CLIENT(it->data)) {
 675             ObClient *c = it->data;
 676             guint d = c->desktop;
 677             if (d != DESKTOP_ALL && d >= movedesktop) {
 678                 client_set_desktop(c, c->desktop - 1, TRUE, TRUE);
 679                 ob_debug("moving window %s\n", c->title);
 680             }
 681             /* raise all the windows that are on the current desktop which
 682                is being merged */
 683             if ((screen_desktop == rmdesktop - 1 ||
 684                  screen_desktop == rmdesktop) &&
 685                 (d == DESKTOP_ALL || d == screen_desktop))
 686             {
 687                 stacking_raise(CLIENT_AS_WINDOW(c));
 688                 ob_debug("raising window %s\n", c->title);
 689             }
 690         }
 691     }
 692
 693     /* act like we're changing desktops */
 694     if (screen_desktop < screen_num_desktops - 1) {
 695         gint d = screen_desktop;
 696         screen_desktop = screen_last_desktop;
 697         screen_set_desktop(d, TRUE);
 698         ob_debug("fake desktop change\n");
 699     }
 700
 701     screen_set_num_desktops(screen_num_desktops-1);
 702 }
 703
 704 static void get_row_col(guint d, guint *r, guint *c)
 705 {
 706     switch (screen_desktop_layout.orientation) {
 707     case OB_ORIENTATION_HORZ:
 708         switch (screen_desktop_layout.start_corner) {
 709         case OB_CORNER_TOPLEFT:
 710             *r = d / screen_desktop_layout.columns;
 711             *c = d % screen_desktop_layout.columns;
 712             break;
 713         case OB_CORNER_BOTTOMLEFT:
 714             *r = screen_desktop_layout.rows - 1 -
 715                 d / screen_desktop_layout.columns;
 716             *c = d % screen_desktop_layout.columns;
 717             break;
 718         case OB_CORNER_TOPRIGHT:
 719             *r = d / screen_desktop_layout.columns;
 720             *c = screen_desktop_layout.columns - 1 -
 721                 d % screen_desktop_layout.columns;
 722             break;
 723         case OB_CORNER_BOTTOMRIGHT:
 724             *r = screen_desktop_layout.rows - 1 -
 725                 d / screen_desktop_layout.columns;
 726             *c = screen_desktop_layout.columns - 1 -
 727                 d % screen_desktop_layout.columns;
 728             break;
 729         }
 730         break;
 731     case OB_ORIENTATION_VERT:
 732         switch (screen_desktop_layout.start_corner) {
 733         case OB_CORNER_TOPLEFT:
 734             *r = d % screen_desktop_layout.rows;
 735             *c = d / screen_desktop_layout.rows;
 736             break;
 737         case OB_CORNER_BOTTOMLEFT:
 738             *r = screen_desktop_layout.rows - 1 -
 739                 d % screen_desktop_layout.rows;
 740             *c = d / screen_desktop_layout.rows;
 741             break;
 742         case OB_CORNER_TOPRIGHT:
 743             *r = d % screen_desktop_layout.rows;
 744             *c = screen_desktop_layout.columns - 1 -
 745                 d / screen_desktop_layout.rows;
 746             break;
 747         case OB_CORNER_BOTTOMRIGHT:
 748             *r = screen_desktop_layout.rows - 1 -
 749                 d % screen_desktop_layout.rows;
 750             *c = screen_desktop_layout.columns - 1 -
 751                 d / screen_desktop_layout.rows;
 752             break;
 753         }
 754         break;
 755     }
 756 }
 757
 758 static guint translate_row_col(guint r, guint c)
 759 {
 760     switch (screen_desktop_layout.orientation) {
 761     case OB_ORIENTATION_HORZ:
 762         switch (screen_desktop_layout.start_corner) {
 763         case OB_CORNER_TOPLEFT:
 764             return r % screen_desktop_layout.rows *
 765                 screen_desktop_layout.columns +
 766                 c % screen_desktop_layout.columns;
 767         case OB_CORNER_BOTTOMLEFT:
 768             return (screen_desktop_layout.rows - 1 -
 769                     r % screen_desktop_layout.rows) *
 770                 screen_desktop_layout.columns +
 771                 c % screen_desktop_layout.columns;
 772         case OB_CORNER_TOPRIGHT:
 773             return r % screen_desktop_layout.rows *
 774                 screen_desktop_layout.columns +
 775                 (screen_desktop_layout.columns - 1 -
 776                  c % screen_desktop_layout.columns);
 777         case OB_CORNER_BOTTOMRIGHT:
 778             return (screen_desktop_layout.rows - 1 -
 779                     r % screen_desktop_layout.rows) *
 780                 screen_desktop_layout.columns +
 781                 (screen_desktop_layout.columns - 1 -
 782                  c % screen_desktop_layout.columns);
 783         }
 784     case OB_ORIENTATION_VERT:
 785         switch (screen_desktop_layout.start_corner) {
 786         case OB_CORNER_TOPLEFT:
 787             return c % screen_desktop_layout.columns *
 788                 screen_desktop_layout.rows +
 789                 r % screen_desktop_layout.rows;
 790         case OB_CORNER_BOTTOMLEFT:
 791             return c % screen_desktop_layout.columns *
 792                 screen_desktop_layout.rows +
 793                 (screen_desktop_layout.rows - 1 -
 794                  r % screen_desktop_layout.rows);
 795         case OB_CORNER_TOPRIGHT:
 796             return (screen_desktop_layout.columns - 1 -
 797                     c % screen_desktop_layout.columns) *
 798                 screen_desktop_layout.rows +
 799                 r % screen_desktop_layout.rows;
 800         case OB_CORNER_BOTTOMRIGHT:
 801             return (screen_desktop_layout.columns - 1 -
 802                     c % screen_desktop_layout.columns) *
 803                 screen_desktop_layout.rows +
 804                 (screen_desktop_layout.rows - 1 -
 805                  r % screen_desktop_layout.rows);
 806         }
 807     }
 808     g_assert_not_reached();
 809     return 0;
 810 }
 811
 812 void screen_desktop_popup(guint d, gboolean show)
 813 {
 814     Rect *a;
 815
 816     if (!show) {
 817         pager_popup_hide(desktop_cycle_popup);
 818     } else {
 819         a = screen_physical_area_active();
 820         pager_popup_position(desktop_cycle_popup, CenterGravity,
 821                              a->x + a->width / 2, a->y + a->height / 2);
 822         pager_popup_icon_size_multiplier(desktop_cycle_popup,
 823                                          (screen_desktop_layout.columns /
 824                                           screen_desktop_layout.rows) / 2,
 825                                          (screen_desktop_layout.rows/
 826                                           screen_desktop_layout.columns) / 2);
 827         pager_popup_max_width(desktop_cycle_popup,
 828                               MAX(a->width/3, POPUP_WIDTH));
 829         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
 830     }
 831 }
 832
 833 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 834                            gboolean dialog, gboolean done, gboolean cancel)
 835 {
 836     guint r, c;
 837     static guint d = (guint)-1;
 838     guint ret, oldd;
 839
 840     if (d == (guint)-1)
 841         d = screen_desktop;
 842
 843     if ((cancel || done) && dialog)
 844         goto show_cycle_dialog;
 845
 846     oldd = d;
 847     get_row_col(d, &r, &c);
 848
 849     if (linear) {
 850         switch (dir) {
 851         case OB_DIRECTION_EAST:
 852             if (d < screen_num_desktops - 1)
 853                 ++d;
 854             else if (wrap)
 855                 d = 0;
 856             break;
 857         case OB_DIRECTION_WEST:
 858             if (d > 0)
 859                 --d;
 860             else if (wrap)
 861                 d = screen_num_desktops - 1;
 862             break;
 863         default:
 864             assert(0);
 865             return screen_desktop;
 866         }
 867     } else {
 868         switch (dir) {
 869         case OB_DIRECTION_EAST:
 870             ++c;
 871             if (c >= screen_desktop_layout.columns) {
 872                 if (wrap)
 873                     c = 0;
 874                 else
 875                     goto show_cycle_dialog;
 876             }
 877             d = translate_row_col(r, c);
 878             if (d >= screen_num_desktops) {
 879                 if (wrap) {
 880                     ++c;
 881                 } else {
 882                     d = oldd;
 883                     goto show_cycle_dialog;
 884                 }
 885             }
 886             break;
 887         case OB_DIRECTION_WEST:
 888             --c;
 889             if (c >= screen_desktop_layout.columns) {
 890                 if (wrap)
 891                     c = screen_desktop_layout.columns - 1;
 892                 else
 893                     goto show_cycle_dialog;
 894             }
 895             d = translate_row_col(r, c);
 896             if (d >= screen_num_desktops) {
 897                 if (wrap) {
 898                     --c;
 899                 } else {
 900                     d = oldd;
 901                     goto show_cycle_dialog;
 902                 }
 903             }
 904             break;
 905         case OB_DIRECTION_SOUTH:
 906             ++r;
 907             if (r >= screen_desktop_layout.rows) {
 908                 if (wrap)
 909                     r = 0;
 910                 else
 911                     goto show_cycle_dialog;
 912             }
 913             d = translate_row_col(r, c);
 914             if (d >= screen_num_desktops) {
 915                 if (wrap) {
 916                     ++r;
 917                 } else {
 918                     d = oldd;
 919                     goto show_cycle_dialog;
 920                 }
 921             }
 922             break;
 923         case OB_DIRECTION_NORTH:
 924             --r;
 925             if (r >= screen_desktop_layout.rows) {
 926                 if (wrap)
 927                     r = screen_desktop_layout.rows - 1;
 928                 else
 929                     goto show_cycle_dialog;
 930             }
 931             d = translate_row_col(r, c);
 932             if (d >= screen_num_desktops) {
 933                 if (wrap) {
 934                     --r;
 935                 } else {
 936                     d = oldd;
 937                     goto show_cycle_dialog;
 938                 }
 939             }
 940             break;
 941         default:
 942             assert(0);
 943             return d = screen_desktop;
 944         }
 945
 946         d = translate_row_col(r, c);
 947     }
 948
 949 show_cycle_dialog:
 950     if (dialog && !cancel && !done) {
 951         screen_desktop_popup(d, TRUE);
 952     } else
 953         screen_desktop_popup(0, FALSE);
 954     ret = d;
 955
 956     if (!dialog || cancel || done)
 957         d = (guint)-1;
 958
 959     return ret;
 960 }
 961
 962 static gboolean screen_validate_layout(ObDesktopLayout *l)
 963 {
 964     if (l->columns == 0 && l->rows == 0) /* both 0's is bad data.. */
 965         return FALSE;
 966
 967     /* fill in a zero rows/columns */
 968     if (l->columns == 0) {
 969         l->columns = screen_num_desktops / l->rows;
 970         if (l->rows * l->columns < screen_num_desktops)
 971             l->columns++;
 972         if (l->rows * l->columns >= screen_num_desktops + l->columns)
 973             l->rows--;
 974     } else if (l->rows == 0) {
 975         l->rows = screen_num_desktops / l->columns;
 976         if (l->columns * l->rows < screen_num_desktops)
 977             l->rows++;
 978         if (l->columns * l->rows >= screen_num_desktops + l->rows)
 979             l->columns--;
 980     }
 981
 982     /* bounds checking */
 983     if (l->orientation == OB_ORIENTATION_HORZ) {
 984         l->columns = MIN(screen_num_desktops, l->columns);
 985         l->rows = MIN(l->rows,
 986                       (screen_num_desktops + l->columns - 1) / l->columns);
 987         l->columns = screen_num_desktops / l->rows +
 988             !!(screen_num_desktops % l->rows);
 989     } else {
 990         l->rows = MIN(screen_num_desktops, l->rows);
 991         l->columns = MIN(l->columns,
 992                          (screen_num_desktops + l->rows - 1) / l->rows);
 993         l->rows = screen_num_desktops / l->columns +
 994             !!(screen_num_desktops % l->columns);
 995     }
 996     return TRUE;
 997 }
 998
 999 void screen_update_layout()
1000
1001 {
1002     ObDesktopLayout l;
1003     guint32 *data;
1004     guint num;
1005
1006     screen_desktop_layout.orientation = OB_ORIENTATION_HORZ;
1007     screen_desktop_layout.start_corner = OB_CORNER_TOPLEFT;
1008     screen_desktop_layout.rows = 1;
1009     screen_desktop_layout.columns = screen_num_desktops;
1010
1011     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
1012                     net_desktop_layout, cardinal, &data, &num)) {
1013         if (num == 3 || num == 4) {
1014
1015             if (data[0] == prop_atoms.net_wm_orientation_vert)
1016                 l.orientation = OB_ORIENTATION_VERT;
1017             else if (data[0] == prop_atoms.net_wm_orientation_horz)
1018                 l.orientation = OB_ORIENTATION_HORZ;
1019             else
1020                 return;
1021
1022             if (num < 4)
1023                 l.start_corner = OB_CORNER_TOPLEFT;
1024             else {
1025                 if (data[3] == prop_atoms.net_wm_topleft)
1026                     l.start_corner = OB_CORNER_TOPLEFT;
1027                 else if (data[3] == prop_atoms.net_wm_topright)
1028                     l.start_corner = OB_CORNER_TOPRIGHT;
1029                 else if (data[3] == prop_atoms.net_wm_bottomright)
1030                     l.start_corner = OB_CORNER_BOTTOMRIGHT;
1031                 else if (data[3] == prop_atoms.net_wm_bottomleft)
1032                     l.start_corner = OB_CORNER_BOTTOMLEFT;
1033                 else
1034                     return;
1035             }
1036
1037             l.columns = data[1];
1038             l.rows = data[2];
1039
1040             if (screen_validate_layout(&l))
1041                 screen_desktop_layout = l;
1042
1043             g_free(data);
1044         }
1045     }
1046 }
1047
1048 void screen_update_desktop_names()
1049 {
1050     guint i;
1051
1052     /* empty the array */
1053     g_strfreev(screen_desktop_names);
1054     screen_desktop_names = NULL;
1055
1056     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
1057                    net_desktop_names, utf8, &screen_desktop_names))
1058         for (i = 0; screen_desktop_names[i] && i < screen_num_desktops; ++i);
1059     else
1060         i = 0;
1061     if (i < screen_num_desktops) {
1062         GSList *it;
1063
1064         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
1065                                        screen_num_desktops + 1);
1066         screen_desktop_names[screen_num_desktops] = NULL;
1067
1068         it = g_slist_nth(config_desktops_names, i);
1069
1070         for (; i < screen_num_desktops; ++i) {
1071             if (it && ((char*)it->data)[0]) /* not empty */
1072                 /* use the names from the config file when possible */
1073                 screen_desktop_names[i] = g_strdup(it->data);
1074             else
1075                 /* make up a nice name if it's not though */
1076                 screen_desktop_names[i] = g_strdup_printf(_("desktop %i"),
1077                                                           i + 1);
1078             if (it) it = g_slist_next(it);
1079         }
1080
1081         /* if we changed any names, then set the root property so we can
1082            all agree on the names */
1083         PROP_SETSS(RootWindow(ob_display, ob_screen), net_desktop_names,
1084                    screen_desktop_names);
1085     }
1086
1087     /* resize the pager for these names */
1088     pager_popup_text_width_to_strings(desktop_cycle_popup,
1089                                       screen_desktop_names,
1090                                       screen_num_desktops);
1091 }
1092
1093 void screen_show_desktop(gboolean show, ObClient *show_only)
1094 {
1095     GList *it;
1096
1097     if (show == screen_showing_desktop) return; /* no change */
1098
1099     screen_showing_desktop = show;
1100
1101     if (show) {
1102         /* hide windows bottom to top */
1103         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
1104             if (WINDOW_IS_CLIENT(it->data)) {
1105                 ObClient *client = it->data;
1106                 client_showhide(client);
1107             }
1108         }
1109     }
1110     else {
1111         /* restore windows top to bottom */
1112         for (it = stacking_list; it; it = g_list_next(it)) {
1113             if (WINDOW_IS_CLIENT(it->data)) {
1114                 ObClient *client = it->data;
1115                 if (client_should_show(client)) {
1116                     if (!show_only || client == show_only)
1117                         client_show(client);
1118                     else
1119                         client_iconify(client, TRUE, FALSE, TRUE);
1120                 }
1121             }
1122         }
1123     }
1124
1125     if (show) {
1126         /* focus the desktop */
1127         for (it = focus_order; it; it = g_list_next(it)) {
1128             ObClient *c = it->data;
1129             if (c->type == OB_CLIENT_TYPE_DESKTOP &&
1130                 (c->desktop == screen_desktop || c->desktop == DESKTOP_ALL) &&
1131                 client_focus(it->data))
1132                 break;
1133         }
1134     }
1135     else if (!show_only) {
1136         ObClient *c;
1137
1138         if ((c = focus_fallback(TRUE, FALSE, TRUE))) {
1139             /* only do the flicker reducing stuff ahead of time if we are going
1140                to call xsetinputfocus on the window ourselves. otherwise there
1141                is no guarantee the window will actually take focus.. */
1142             if (c->can_focus) {
1143                 /* reduce flicker by hiliting now rather than waiting for the
1144                    server FocusIn event */
1145                 frame_adjust_focus(c->frame, TRUE);
1146             }
1147         }
1148     }
1149
1150     show = !!show; /* make it boolean */
1151     PROP_SET32(RootWindow(ob_display, ob_screen),
1152                net_showing_desktop, cardinal, show);
1153 }
1154
1155 void screen_install_colormap(ObClient *client, gboolean install)
1156 {
1157     if (client == NULL || client->colormap == None) {
1158         if (install)
1159             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
1160         else
1161             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
1162     } else {
1163         xerror_set_ignore(TRUE);
1164         if (install)
1165             XInstallColormap(RrDisplay(ob_rr_inst), client->colormap);
1166         else
1167             XUninstallColormap(RrDisplay(ob_rr_inst), client->colormap);
1168         xerror_set_ignore(FALSE);
1169     }
1170 }
1171
1172 #define STRUT_LEFT_ON_MONITOR(s, i) \
1173     (RANGES_INTERSECT(s->left_start, s->left_end - s->left_start + 1, \
1174                       monitor_area[i].y, monitor_area[i].height))
1175 #define STRUT_RIGHT_ON_MONITOR(s, i) \
1176     (RANGES_INTERSECT(s->right_start, s->right_end - s->right_start + 1, \
1177                       monitor_area[i].y, monitor_area[i].height))
1178 #define STRUT_TOP_ON_MONITOR(s, i) \
1179     (RANGES_INTERSECT(s->top_start, s->top_end - s->top_start + 1, \
1180                       monitor_area[i].x, monitor_area[i].width))
1181 #define STRUT_BOTTOM_ON_MONITOR(s, i) \
1182     (RANGES_INTERSECT(s->bottom_start, s->bottom_end - s->bottom_start + 1, \
1183                       monitor_area[i].x, monitor_area[i].width))
1184
1185 typedef struct {
1186     guint desktop;
1187     StrutPartial *strut;
1188 } ObScreenStrut;
1189
1190 #define RESET_STRUT_LIST(sl) \
1191     (g_slist_free(sl), sl = NULL)
1192
1193 #define ADD_STRUT_TO_LIST(sl, d, s) \
1194 { \
1195     ObScreenStrut *ss = g_new(ObScreenStrut, 1); \
1196     ss->desktop = d; \
1197     ss->strut = s;  \
1198     sl = g_slist_prepend(sl, ss); \
1199 }
1200
1201 void screen_update_areas()
1202 {
1203     guint i, j;
1204     gulong *dims;
1205     GList *it;
1206     GSList *sit;
1207
1208     ob_debug("updating screen areas\n");
1209
1210     g_free(monitor_area);
1211     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
1212
1213     dims = g_new(gulong, 4 * screen_num_desktops * screen_num_monitors);
1214
1215     RESET_STRUT_LIST(struts_left);
1216     RESET_STRUT_LIST(struts_top);
1217     RESET_STRUT_LIST(struts_right);
1218     RESET_STRUT_LIST(struts_bottom);
1219
1220     /* collect the struts */
1221     for (it = client_list; it; it = g_list_next(it)) {
1222         ObClient *c = it->data;
1223         if (c->strut.left)
1224             ADD_STRUT_TO_LIST(struts_left, c->desktop, &c->strut);
1225         if (c->strut.top)
1226             ADD_STRUT_TO_LIST(struts_top, c->desktop, &c->strut);
1227         if (c->strut.right)
1228             ADD_STRUT_TO_LIST(struts_right, c->desktop, &c->strut);
1229         if (c->strut.bottom)
1230             ADD_STRUT_TO_LIST(struts_bottom, c->desktop, &c->strut);
1231     }
1232     if (dock_strut.left)
1233         ADD_STRUT_TO_LIST(struts_left, DESKTOP_ALL, &dock_strut);
1234     if (dock_strut.top)
1235         ADD_STRUT_TO_LIST(struts_top, DESKTOP_ALL, &dock_strut);
1236     if (dock_strut.right)
1237         ADD_STRUT_TO_LIST(struts_right, DESKTOP_ALL, &dock_strut);
1238     if (dock_strut.bottom)
1239         ADD_STRUT_TO_LIST(struts_bottom, DESKTOP_ALL, &dock_strut);
1240
1241     /* set up the work areas to be full screen */
1242     for (i = 0; i < screen_num_monitors; ++i)
1243         for (j = 0; j < screen_num_desktops; ++j) {
1244             dims[(i * screen_num_desktops + j) * 4+0] = monitor_area[i].x;
1245             dims[(i * screen_num_desktops + j) * 4+1] = monitor_area[i].y;
1246             dims[(i * screen_num_desktops + j) * 4+2] = monitor_area[i].width;
1247             dims[(i * screen_num_desktops + j) * 4+3] = monitor_area[i].height;
1248         }
1249
1250     /* calculate the work areas from the struts */
1251     for (i = 0; i < screen_num_monitors; ++i)
1252         for (j = 0; j < screen_num_desktops; ++j) {
1253             gint l = 0, r = 0, t = 0, b = 0;
1254
1255             /* only add the strut to the area if it touches the monitor */
1256
1257             for (sit = struts_left; sit; sit = g_slist_next(sit)) {
1258                 ObScreenStrut *s = sit->data;
1259                 if ((s->desktop == j || s->desktop == DESKTOP_ALL) &&
1260                     STRUT_LEFT_ON_MONITOR(s->strut, i))
1261                     l = MAX(l, s->strut->left);
1262             }
1263             for (sit = struts_top; sit; sit = g_slist_next(sit)) {
1264                 ObScreenStrut *s = sit->data;
1265                 if ((s->desktop == j || s->desktop == DESKTOP_ALL) &&
1266                     STRUT_TOP_ON_MONITOR(s->strut, i))
1267                     t = MAX(t, s->strut->top);
1268             }
1269             for (sit = struts_right; sit; sit = g_slist_next(sit)) {
1270                 ObScreenStrut *s = sit->data;
1271                 if ((s->desktop == j || s->desktop == DESKTOP_ALL) &&
1272                     STRUT_RIGHT_ON_MONITOR(s->strut, i))
1273                     r = MAX(r, s->strut->right);
1274             }
1275             for (sit = struts_bottom; sit; sit = g_slist_next(sit)) {
1276                 ObScreenStrut *s = sit->data;
1277                 if ((s->desktop == j || s->desktop == DESKTOP_ALL) &&
1278                     STRUT_BOTTOM_ON_MONITOR(s->strut, i))
1279                     b = MAX(b, s->strut->bottom);
1280             }
1281
1282             /* based on these margins, set the work area for the
1283                monitor/desktop */
1284             dims[(i * screen_num_desktops + j) * 4 + 0] += l;
1285             dims[(i * screen_num_desktops + j) * 4 + 1] += t;
1286             dims[(i * screen_num_desktops + j) * 4 + 2] -= l + r;
1287             dims[(i * screen_num_desktops + j) * 4 + 3] -= t + b;
1288         }
1289
1290     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1291                 dims, 4 * screen_num_desktops * screen_num_monitors);
1292
1293     /* the area has changed, adjust all the windows if they need it */
1294     for (it = client_list; it; it = g_list_next(it))
1295         client_reconfigure(it->data, FALSE);
1296
1297     g_free(dims);
1298 }
1299
1300 #if 0
1301 Rect* screen_area_all_monitors(guint desktop)
1302 {
1303     guint i;
1304     Rect *a;
1305
1306     a = screen_area_monitor(desktop, 0);
1307
1308     /* combine all the monitors together */
1309     for (i = 1; i < screen_num_monitors; ++i) {
1310         Rect *m = screen_area_monitor(desktop, i);
1311         gint l, r, t, b;
1312
1313         l = MIN(RECT_LEFT(*a), RECT_LEFT(*m));
1314         t = MIN(RECT_TOP(*a), RECT_TOP(*m));
1315         r = MAX(RECT_RIGHT(*a), RECT_RIGHT(*m));
1316         b = MAX(RECT_BOTTOM(*a), RECT_BOTTOM(*m));
1317
1318         RECT_SET(*a, l, t, r - l + 1, b - t + 1);
1319
1320         g_free(m);
1321     }
1322
1323     return a;
1324 }
1325 #endif
1326
1327 #define STRUT_LEFT_IN_SEARCH(s, search) \
1328     (RANGES_INTERSECT(search->y, search->height, \
1329                       s->left_start, s->left_end - s->left_start + 1))
1330 #define STRUT_RIGHT_IN_SEARCH(s, search) \
1331     (RANGES_INTERSECT(search->y, search->height, \
1332                       s->right_start, s->right_end - s->right_start + 1))
1333 #define STRUT_TOP_IN_SEARCH(s, search) \
1334     (RANGES_INTERSECT(search->x, search->width, \
1335                       s->top_start, s->top_end - s->top_start + 1))
1336 #define STRUT_BOTTOM_IN_SEARCH(s, search) \
1337     (RANGES_INTERSECT(search->x, search->width, \
1338                       s->bottom_start, s->bottom_end - s->bottom_start + 1))
1339
1340 #define STRUT_LEFT_IGNORE(s, us, search) \
1341     (head == SCREEN_AREA_ALL_MONITORS && us && \
1342      RECT_LEFT(monitor_area[i]) + s->left > RECT_LEFT(*search))
1343 #define STRUT_RIGHT_IGNORE(s, us, search) \
1344     (head == SCREEN_AREA_ALL_MONITORS && us && \
1345      RECT_RIGHT(monitor_area[i]) - s->right < RECT_RIGHT(*search))
1346 #define STRUT_TOP_IGNORE(s, us, search) \
1347     (head == SCREEN_AREA_ALL_MONITORS && us && \
1348      RECT_TOP(monitor_area[i]) + s->top > RECT_TOP(*search))
1349 #define STRUT_BOTTOM_IGNORE(s, us, search) \
1350     (head == SCREEN_AREA_ALL_MONITORS && us && \
1351      RECT_BOTTOM(monitor_area[i]) - s->bottom < RECT_BOTTOM(*search))
1352
1353 Rect* screen_area(guint desktop, guint head, Rect *search)
1354 {
1355     Rect *a;
1356     GSList *it;
1357     gint l, r, t, b, al, ar, at, ab;
1358     guint i, d;
1359     gboolean us = search != NULL; /* user provided search */
1360
1361     g_assert(desktop < screen_num_desktops || desktop == DESKTOP_ALL);
1362     g_assert(head < screen_num_monitors || head == SCREEN_AREA_ONE_MONITOR ||
1363              head == SCREEN_AREA_ALL_MONITORS);
1364     g_assert(!(head == SCREEN_AREA_ONE_MONITOR && search == NULL));
1365
1366     /* find any struts for this monitor
1367        which will be affecting the search area.
1368     */
1369
1370     /* search everything if search is null */
1371     if (!search) {
1372         if (head < screen_num_monitors) search = &monitor_area[head];
1373         else search = &monitor_area[screen_num_monitors];
1374     }
1375     if (head == SCREEN_AREA_ONE_MONITOR) head = screen_find_monitor(search);
1376
1377     /* al is "all left" meaning the furthest left you can get, l is our
1378        "working left" meaning our current strut edge which we're calculating
1379     */
1380
1381     /* only include monitors which the search area lines up with */
1382     if (RECT_INTERSECTS_RECT(monitor_area[screen_num_monitors], *search)) {
1383         al = l = RECT_RIGHT(monitor_area[screen_num_monitors]);
1384         at = t = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1385         ar = r = RECT_LEFT(monitor_area[screen_num_monitors]);
1386         ab = b = RECT_TOP(monitor_area[screen_num_monitors]);
1387         for (i = 0; i < screen_num_monitors; ++i) {
1388             /* add the monitor if applicable */
1389             if (RANGES_INTERSECT(search->x, search->width,
1390                                  monitor_area[i].x, monitor_area[i].width))
1391             {
1392                 at = t = MIN(t, RECT_TOP(monitor_area[i]));
1393                 ab = b = MAX(b, RECT_BOTTOM(monitor_area[i]));
1394             }
1395             if (RANGES_INTERSECT(search->y, search->height,
1396                                  monitor_area[i].y, monitor_area[i].height))
1397             {
1398                 al = l = MIN(l, RECT_LEFT(monitor_area[i]));
1399                 ar = r = MAX(r, RECT_RIGHT(monitor_area[i]));
1400             }
1401         }
1402     } else {
1403         al = l = RECT_LEFT(monitor_area[screen_num_monitors]);
1404         at = t = RECT_TOP(monitor_area[screen_num_monitors]);
1405         ar = r = RECT_RIGHT(monitor_area[screen_num_monitors]);
1406         ab = b = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1407     }
1408
1409     for (d = 0; d < screen_num_desktops; ++d) {
1410         if (d != desktop && desktop != DESKTOP_ALL) continue;
1411
1412         for (i = 0; i < screen_num_monitors; ++i) {
1413             if (head != SCREEN_AREA_ALL_MONITORS && head != i) continue;
1414
1415             for (it = struts_left; it; it = g_slist_next(it)) {
1416                 ObScreenStrut *s = it->data;
1417                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1418                     STRUT_LEFT_IN_SEARCH(s->strut, search) &&
1419                     !STRUT_LEFT_IGNORE(s->strut, us, search))
1420                     l = MAX(l, al + s->strut->left);
1421             }
1422             for (it = struts_top; it; it = g_slist_next(it)) {
1423                 ObScreenStrut *s = it->data;
1424                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1425                     STRUT_TOP_IN_SEARCH(s->strut, search) &&
1426                     !STRUT_TOP_IGNORE(s->strut, us, search))
1427                     t = MAX(t, at + s->strut->top);
1428             }
1429             for (it = struts_right; it; it = g_slist_next(it)) {
1430                 ObScreenStrut *s = it->data;
1431                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1432                     STRUT_RIGHT_IN_SEARCH(s->strut, search) &&
1433                     !STRUT_RIGHT_IGNORE(s->strut, us, search))
1434                     r = MIN(r, ar - s->strut->right);
1435             }
1436             for (it = struts_bottom; it; it = g_slist_next(it)) {
1437                 ObScreenStrut *s = it->data;
1438                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1439                     STRUT_BOTTOM_IN_SEARCH(s->strut, search) &&
1440                     !STRUT_BOTTOM_IGNORE(s->strut, us, search))
1441                     b = MIN(b, ab - s->strut->bottom);
1442             }
1443
1444             /* limit to this monitor */
1445             if (head == i) {
1446                 l = MAX(l, RECT_LEFT(monitor_area[i]));
1447                 t = MAX(t, RECT_TOP(monitor_area[i]));
1448                 r = MIN(r, RECT_RIGHT(monitor_area[i]));
1449                 b = MIN(b, RECT_BOTTOM(monitor_area[i]));
1450             }
1451         }
1452     }
1453
1454     a = g_new(Rect, 1);
1455     a->x = l;
1456     a->y = t;
1457     a->width = r - l + 1;
1458     a->height = b - t + 1;
1459     return a;
1460 }
1461
1462 guint screen_find_monitor(Rect *search)
1463 {
1464     guint i;
1465     guint most = 0;
1466     guint mostv = 0;
1467
1468     for (i = 0; i < screen_num_monitors; ++i) {
1469         Rect *area = screen_physical_area_monitor(i);
1470         if (RECT_INTERSECTS_RECT(*area, *search)) {
1471             Rect r;
1472             guint v;
1473
1474             RECT_SET_INTERSECTION(r, *area, *search);
1475             v = r.width * r.height;
1476
1477             if (v > mostv) {
1478                 mostv = v;
1479                 most = i;
1480             }
1481         }
1482         g_free(area);
1483     }
1484     return most;
1485 }
1486
1487 Rect* screen_physical_area_all_monitors()
1488 {
1489     return screen_physical_area_monitor(screen_num_monitors);
1490 }
1491
1492 Rect* screen_physical_area_monitor(guint head)
1493 {
1494     Rect *a;
1495     g_assert(head <= screen_num_monitors);
1496
1497     a = g_new(Rect, 1);
1498     *a = monitor_area[head];
1499     return a;
1500 }
1501
1502 gboolean screen_physical_area_monitor_contains(guint head, Rect *search)
1503 {
1504     g_assert(head <= screen_num_monitors);
1505     g_assert(search);
1506     return RECT_INTERSECTS_RECT(monitor_area[head], *search);
1507 }
1508
1509 Rect* screen_physical_area_active()
1510 {
1511     Rect *a;
1512     gint x, y;
1513
1514     if (focus_client)
1515         a = screen_physical_area_monitor(client_monitor(focus_client));
1516     else {
1517         Rect mon;
1518         if (screen_pointer_pos(&x, &y))
1519             RECT_SET(mon, x, y, 1, 1);
1520         else
1521             RECT_SET(mon, 0, 0, 1, 1);
1522         a = screen_physical_area_monitor(screen_find_monitor(&mon));
1523     }
1524     return a;
1525 }
1526
1527 void screen_set_root_cursor()
1528 {
1529     if (sn_app_starting())
1530         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1531                       ob_cursor(OB_CURSOR_BUSYPOINTER));
1532     else
1533         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1534                       ob_cursor(OB_CURSOR_POINTER));
1535 }
1536
1537 gboolean screen_pointer_pos(gint *x, gint *y)
1538 {
1539     Window w;
1540     gint i;
1541     guint u;
1542     gboolean ret;
1543
1544     ret = !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1545                           &w, &w, x, y, &i, &i, &u);
1546     if (!ret) {
1547         for (i = 0; i < ScreenCount(ob_display); ++i)
1548             if (i != ob_screen)
1549                 if (XQueryPointer(ob_display, RootWindow(ob_display, i),
1550                                   &w, &w, x, y, &i, &i, &u))
1551                     break;
1552     }
1553     return ret;
1554 }