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 "client.h"
  31 #include "frame.h"
  32 #include "event.h"
  33 #include "focus.h"
  34 #include "popup.h"
  35 #include "extensions.h"
  36 #include "render/render.h"
  37
  38 #include <X11/Xlib.h>
  39 #ifdef HAVE_UNISTD_H
  40 #  include <sys/types.h>
  41 #  include <unistd.h>
  42 #endif
  43 #include <assert.h>
  44
  45 /*! The event mask to grab on the root window */
  46 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
  47                         EnterWindowMask | LeaveWindowMask | \
  48                         SubstructureRedirectMask | FocusChangeMask | \
  49                         ButtonPressMask | ButtonReleaseMask | ButtonMotionMask)
  50
  51 guint    screen_num_desktops;
  52 guint    screen_num_monitors;
  53 guint    screen_desktop;
  54 guint    screen_last_desktop;
  55 Size     screen_physical_size;
  56 gboolean screen_showing_desktop;
  57 DesktopLayout screen_desktop_layout;
  58 gchar  **screen_desktop_names;
  59 Window   screen_support_win;
  60
  61 static Rect  **area; /* array of desktop holding array of xinerama areas */
  62 static Rect  *monitor_area;
  63
  64 static ObPagerPopup *desktop_cycle_popup;
  65
  66 static gboolean replace_wm()
  67 {
  68     gchar *wm_sn;
  69     Atom wm_sn_atom;
  70     Window current_wm_sn_owner;
  71     Time timestamp;
  72
  73     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
  74     wm_sn_atom = XInternAtom(ob_display, wm_sn, FALSE);
  75     g_free(wm_sn);
  76
  77     current_wm_sn_owner = XGetSelectionOwner(ob_display, wm_sn_atom);
  78     if (current_wm_sn_owner == screen_support_win)
  79         current_wm_sn_owner = None;
  80     if (current_wm_sn_owner) {
  81         if (!ob_replace_wm) {
  82             g_warning("A window manager is already running on screen %d",
  83                       ob_screen);
  84             return FALSE;
  85         }
  86         xerror_set_ignore(TRUE);
  87         xerror_occured = FALSE;
  88
  89         /* We want to find out when the current selection owner dies */
  90         XSelectInput(ob_display, current_wm_sn_owner, StructureNotifyMask);
  91         XSync(ob_display, FALSE);
  92
  93         xerror_set_ignore(FALSE);
  94         if (xerror_occured)
  95             current_wm_sn_owner = None;
  96     }
  97
  98     {
  99         /* Generate a timestamp */
 100         XEvent event;
 101
 102         XSelectInput(ob_display, screen_support_win, PropertyChangeMask);
 103
 104         XChangeProperty(ob_display, screen_support_win,
 105                         prop_atoms.wm_class, prop_atoms.string,
 106                         8, PropModeAppend, NULL, 0);
 107         XWindowEvent(ob_display, screen_support_win,
 108                      PropertyChangeMask, &event);
 109
 110         XSelectInput(ob_display, screen_support_win, NoEventMask);
 111
 112         timestamp = event.xproperty.time;
 113     }
 114
 115     XSetSelectionOwner(ob_display, wm_sn_atom, screen_support_win,
 116                        timestamp);
 117
 118     if (XGetSelectionOwner(ob_display, wm_sn_atom) != screen_support_win) {
 119         g_warning("Could not acquire window manager selection on screen %d",
 120                   ob_screen);
 121         return FALSE;
 122     }
 123
 124     /* Wait for old window manager to go away */
 125     if (current_wm_sn_owner) {
 126       XEvent event;
 127       gulong wait = 0;
 128       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
 129
 130       while (wait < timeout) {
 131           if (XCheckWindowEvent(ob_display, current_wm_sn_owner,
 132                                 StructureNotifyMask, &event) &&
 133               event.type == DestroyNotify)
 134               break;
 135           g_usleep(G_USEC_PER_SEC / 10);
 136           wait += G_USEC_PER_SEC / 10;
 137       }
 138
 139       if (wait >= timeout) {
 140           g_warning("Timeout expired while waiting for the current WM to die "
 141                     "on screen %d", ob_screen);
 142           return FALSE;
 143       }
 144     }
 145
 146     /* Send client message indicating that we are now the WM */
 147     prop_message(RootWindow(ob_display, ob_screen), prop_atoms.manager,
 148                  timestamp, wm_sn_atom, 0, 0, SubstructureNotifyMask);
 149
 150
 151     return TRUE;
 152 }
 153
 154 gboolean screen_annex()
 155 {
 156     XSetWindowAttributes attrib;
 157     pid_t pid;
 158     gint i, num_support;
 159     gulong *supported;
 160
 161     /* create the netwm support window */
 162     attrib.override_redirect = TRUE;
 163     screen_support_win = XCreateWindow(ob_display,
 164                                        RootWindow(ob_display, ob_screen),
 165                                        -100, -100, 1, 1, 0,
 166                                        CopyFromParent, InputOutput,
 167                                        CopyFromParent,
 168                                        CWOverrideRedirect, &attrib);
 169     XMapRaised(ob_display, screen_support_win);
 170
 171     if (!replace_wm()) {
 172         XDestroyWindow(ob_display, screen_support_win);
 173         return FALSE;
 174     }
 175
 176     xerror_set_ignore(TRUE);
 177     xerror_occured = FALSE;
 178     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 179                  ROOT_EVENTMASK);
 180     xerror_set_ignore(FALSE);
 181     if (xerror_occured) {
 182         g_warning("A window manager is already running on screen %d",
 183                   ob_screen);
 184
 185         XDestroyWindow(ob_display, screen_support_win);
 186         return FALSE;
 187     }
 188
 189
 190     screen_set_root_cursor();
 191
 192     /* set the OPENBOX_PID hint */
 193     pid = getpid();
 194     PROP_SET32(RootWindow(ob_display, ob_screen),
 195                openbox_pid, cardinal, pid);
 196
 197     /* set supporting window */
 198     PROP_SET32(RootWindow(ob_display, ob_screen),
 199                net_supporting_wm_check, window, screen_support_win);
 200
 201     /* set properties on the supporting window */
 202     PROP_SETS(screen_support_win, net_wm_name, "Openbox");
 203     PROP_SET32(screen_support_win, net_supporting_wm_check,
 204                window, screen_support_win);
 205
 206     /* set the _NET_SUPPORTED_ATOMS hint */
 207     num_support = 55;
 208     i = 0;
 209     supported = g_new(gulong, num_support);
 210     supported[i++] = prop_atoms.net_wm_full_placement;
 211     supported[i++] = prop_atoms.net_current_desktop;
 212     supported[i++] = prop_atoms.net_number_of_desktops;
 213     supported[i++] = prop_atoms.net_desktop_geometry;
 214     supported[i++] = prop_atoms.net_desktop_viewport;
 215     supported[i++] = prop_atoms.net_active_window;
 216     supported[i++] = prop_atoms.net_workarea;
 217     supported[i++] = prop_atoms.net_client_list;
 218     supported[i++] = prop_atoms.net_client_list_stacking;
 219     supported[i++] = prop_atoms.net_desktop_names;
 220     supported[i++] = prop_atoms.net_close_window;
 221     supported[i++] = prop_atoms.net_desktop_layout;
 222     supported[i++] = prop_atoms.net_showing_desktop;
 223     supported[i++] = prop_atoms.net_wm_name;
 224     supported[i++] = prop_atoms.net_wm_visible_name;
 225     supported[i++] = prop_atoms.net_wm_icon_name;
 226     supported[i++] = prop_atoms.net_wm_visible_icon_name;
 227     supported[i++] = prop_atoms.net_wm_desktop;
 228     supported[i++] = prop_atoms.net_wm_strut;
 229     supported[i++] = prop_atoms.net_wm_window_type;
 230     supported[i++] = prop_atoms.net_wm_window_type_desktop;
 231     supported[i++] = prop_atoms.net_wm_window_type_dock;
 232     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
 233     supported[i++] = prop_atoms.net_wm_window_type_menu;
 234     supported[i++] = prop_atoms.net_wm_window_type_utility;
 235     supported[i++] = prop_atoms.net_wm_window_type_splash;
 236     supported[i++] = prop_atoms.net_wm_window_type_dialog;
 237     supported[i++] = prop_atoms.net_wm_window_type_normal;
 238     supported[i++] = prop_atoms.net_wm_allowed_actions;
 239     supported[i++] = prop_atoms.net_wm_action_move;
 240     supported[i++] = prop_atoms.net_wm_action_resize;
 241     supported[i++] = prop_atoms.net_wm_action_minimize;
 242     supported[i++] = prop_atoms.net_wm_action_shade;
 243     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
 244     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
 245     supported[i++] = prop_atoms.net_wm_action_fullscreen;
 246     supported[i++] = prop_atoms.net_wm_action_change_desktop;
 247     supported[i++] = prop_atoms.net_wm_action_close;
 248     supported[i++] = prop_atoms.net_wm_state;
 249     supported[i++] = prop_atoms.net_wm_state_modal;
 250     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
 251     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
 252     supported[i++] = prop_atoms.net_wm_state_shaded;
 253     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
 254     supported[i++] = prop_atoms.net_wm_state_skip_pager;
 255     supported[i++] = prop_atoms.net_wm_state_hidden;
 256     supported[i++] = prop_atoms.net_wm_state_fullscreen;
 257     supported[i++] = prop_atoms.net_wm_state_above;
 258     supported[i++] = prop_atoms.net_wm_state_below;
 259     supported[i++] = prop_atoms.net_wm_state_demands_attention;
 260     supported[i++] = prop_atoms.net_moveresize_window;
 261     supported[i++] = prop_atoms.net_wm_moveresize;
 262     supported[i++] = prop_atoms.net_wm_user_time;
 263     supported[i++] = prop_atoms.net_frame_extents;
 264     supported[i++] = prop_atoms.ob_wm_state_undecorated;
 265     g_assert(i == num_support);
 266 /*
 267   supported[] = prop_atoms.net_wm_action_stick;
 268 */
 269
 270     PROP_SETA32(RootWindow(ob_display, ob_screen),
 271                 net_supported, atom, supported, num_support);
 272     g_free(supported);
 273
 274     return TRUE;
 275 }
 276
 277 void screen_startup(gboolean reconfig)
 278 {
 279     GSList *it;
 280     guint i;
 281
 282     desktop_cycle_popup = pager_popup_new(FALSE);
 283
 284     if (!reconfig)
 285         /* get the initial size */
 286         screen_resize();
 287
 288     /* set the names */
 289     screen_desktop_names = g_new(gchar*,
 290                                  g_slist_length(config_desktops_names) + 1);
 291     for (i = 0, it = config_desktops_names; it; ++i, it = g_slist_next(it))
 292         screen_desktop_names[i] = it->data; /* dont strdup */
 293     screen_desktop_names[i] = NULL;
 294     PROP_SETSS(RootWindow(ob_display, ob_screen),
 295                net_desktop_names, screen_desktop_names);
 296     g_free(screen_desktop_names); /* dont free the individual strings */
 297     screen_desktop_names = NULL;
 298
 299     if (!reconfig)
 300         screen_num_desktops = 0;
 301     screen_set_num_desktops(config_desktops_num);
 302     if (!reconfig) {
 303         screen_set_desktop(MIN(config_screen_firstdesk, screen_num_desktops)
 304                            - 1);
 305
 306         /* don't start in showing-desktop mode */
 307         screen_showing_desktop = FALSE;
 308         PROP_SET32(RootWindow(ob_display, ob_screen),
 309                    net_showing_desktop, cardinal, screen_showing_desktop);
 310
 311         screen_update_layout();
 312     }
 313 }
 314
 315 void screen_shutdown(gboolean reconfig)
 316 {
 317     Rect **r;
 318
 319     pager_popup_free(desktop_cycle_popup);
 320
 321     if (!reconfig) {
 322         XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 323                      NoEventMask);
 324
 325         /* we're not running here no more! */
 326         PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 327         /* not without us */
 328         PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 329         /* don't keep this mode */
 330         PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 331
 332         XDestroyWindow(ob_display, screen_support_win);
 333     }
 334
 335     g_strfreev(screen_desktop_names);
 336     screen_desktop_names = NULL;
 337     for (r = area; *r; ++r)
 338         g_free(*r);
 339     g_free(area);
 340     area = NULL;
 341 }
 342
 343 void screen_resize()
 344 {
 345     static gint oldw = 0, oldh = 0;
 346     gint w, h;
 347     GList *it;
 348     gulong geometry[2];
 349
 350     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 351     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 352
 353     if (w == oldw && h == oldh) return;
 354
 355     oldw = w; oldh = h;
 356
 357     /* Set the _NET_DESKTOP_GEOMETRY hint */
 358     screen_physical_size.width = geometry[0] = w;
 359     screen_physical_size.height = geometry[1] = h;
 360     PROP_SETA32(RootWindow(ob_display, ob_screen),
 361                 net_desktop_geometry, cardinal, geometry, 2);
 362
 363     if (ob_state() == OB_STATE_STARTING)
 364         return;
 365
 366     screen_update_areas();
 367     dock_configure();
 368
 369     for (it = client_list; it; it = g_list_next(it))
 370         client_move_onscreen(it->data, FALSE);
 371 }
 372
 373 void screen_set_num_desktops(guint num)
 374 {
 375     guint old;
 376     gulong *viewport;
 377     GList *it;
 378
 379     g_assert(num > 0);
 380
 381     if (screen_num_desktops == num) return;
 382
 383     old = screen_num_desktops;
 384     screen_num_desktops = num;
 385     PROP_SET32(RootWindow(ob_display, ob_screen),
 386                net_number_of_desktops, cardinal, num);
 387
 388     /* set the viewport hint */
 389     viewport = g_new0(gulong, num * 2);
 390     PROP_SETA32(RootWindow(ob_display, ob_screen),
 391                 net_desktop_viewport, cardinal, viewport, num * 2);
 392     g_free(viewport);
 393
 394     /* the number of rows/columns will differ */
 395     screen_update_layout();
 396
 397     /* may be some unnamed desktops that we need to fill in with names */
 398     screen_update_desktop_names();
 399
 400     /* move windows on desktops that will no longer exist! */
 401     for (it = client_list; it; it = g_list_next(it)) {
 402         ObClient *c = it->data;
 403         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 404             client_set_desktop(c, num - 1, FALSE);
 405     }
 406
 407     /* change our struts/area to match (after moving windows) */
 408     screen_update_areas();
 409
 410     /* change our desktop if we're on one that no longer exists! */
 411     if (screen_desktop >= screen_num_desktops)
 412         screen_set_desktop(num - 1);
 413 }
 414
 415 void screen_set_desktop(guint num)
 416 {
 417     GList *it;
 418     guint old;
 419
 420     g_assert(num < screen_num_desktops);
 421
 422     old = screen_desktop;
 423     screen_desktop = num;
 424     PROP_SET32(RootWindow(ob_display, ob_screen),
 425                net_current_desktop, cardinal, num);
 426
 427     if (old == num) return;
 428
 429     screen_last_desktop = old;
 430
 431     ob_debug("Moving to desktop %d\n", num+1);
 432
 433     if (moveresize_client)
 434         client_set_desktop(moveresize_client, num, TRUE);
 435
 436     /* show windows before hiding the rest to lessen the enter/leave events */
 437
 438     /* show windows from top to bottom */
 439     for (it = stacking_list; it; it = g_list_next(it)) {
 440         if (WINDOW_IS_CLIENT(it->data)) {
 441             ObClient *c = it->data;
 442             client_showhide(c);
 443         }
 444     }
 445
 446     /* hide windows from bottom to top */
 447     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 448         if (WINDOW_IS_CLIENT(it->data)) {
 449             ObClient *c = it->data;
 450             client_showhide(c);
 451         }
 452     }
 453
 454     event_ignore_queued_enters();
 455
 456     focus_hilite = focus_fallback_target(TRUE, focus_client);
 457     if (focus_hilite) {
 458         frame_adjust_focus(focus_hilite->frame, TRUE);
 459
 460         /*!
 461           When this focus_client check is not used, you can end up with races,
 462           as demonstrated with gnome-panel, sometmies the window you click on
 463           another desktop ends up losing focus cuz of the focus change here.
 464         */
 465         /*if (!focus_client)*/
 466         client_focus(focus_hilite);
 467     }
 468 }
 469
 470 static void get_row_col(guint d, guint *r, guint *c)
 471 {
 472     switch (screen_desktop_layout.orientation) {
 473     case OB_ORIENTATION_HORZ:
 474         switch (screen_desktop_layout.start_corner) {
 475         case OB_CORNER_TOPLEFT:
 476             *r = d / screen_desktop_layout.columns;
 477             *c = d % screen_desktop_layout.columns;
 478             break;
 479         case OB_CORNER_BOTTOMLEFT:
 480             *r = screen_desktop_layout.rows - 1 -
 481                 d / screen_desktop_layout.columns;
 482             *c = d % screen_desktop_layout.columns;
 483             break;
 484         case OB_CORNER_TOPRIGHT:
 485             *r = d / screen_desktop_layout.columns;
 486             *c = screen_desktop_layout.columns - 1 -
 487                 d % screen_desktop_layout.columns;
 488             break;
 489         case OB_CORNER_BOTTOMRIGHT:
 490             *r = screen_desktop_layout.rows - 1 -
 491                 d / screen_desktop_layout.columns;
 492             *c = screen_desktop_layout.columns - 1 -
 493                 d % screen_desktop_layout.columns;
 494             break;
 495         }
 496         break;
 497     case OB_ORIENTATION_VERT:
 498         switch (screen_desktop_layout.start_corner) {
 499         case OB_CORNER_TOPLEFT:
 500             *r = d % screen_desktop_layout.rows;
 501             *c = d / screen_desktop_layout.rows;
 502             break;
 503         case OB_CORNER_BOTTOMLEFT:
 504             *r = screen_desktop_layout.rows - 1 -
 505                 d % screen_desktop_layout.rows;
 506             *c = d / screen_desktop_layout.rows;
 507             break;
 508         case OB_CORNER_TOPRIGHT:
 509             *r = d % screen_desktop_layout.rows;
 510             *c = screen_desktop_layout.columns - 1 -
 511                 d / screen_desktop_layout.rows;
 512             break;
 513         case OB_CORNER_BOTTOMRIGHT:
 514             *r = screen_desktop_layout.rows - 1 -
 515                 d % screen_desktop_layout.rows;
 516             *c = screen_desktop_layout.columns - 1 -
 517                 d / screen_desktop_layout.rows;
 518             break;
 519         }
 520         break;
 521     }
 522 }
 523
 524 static guint translate_row_col(guint r, guint c)
 525 {
 526     switch (screen_desktop_layout.orientation) {
 527     case OB_ORIENTATION_HORZ:
 528         switch (screen_desktop_layout.start_corner) {
 529         case OB_CORNER_TOPLEFT:
 530             return r % screen_desktop_layout.rows *
 531                 screen_desktop_layout.columns +
 532                 c % screen_desktop_layout.columns;
 533         case OB_CORNER_BOTTOMLEFT:
 534             return (screen_desktop_layout.rows - 1 -
 535                     r % screen_desktop_layout.rows) *
 536                 screen_desktop_layout.columns +
 537                 c % screen_desktop_layout.columns;
 538         case OB_CORNER_TOPRIGHT:
 539             return r % screen_desktop_layout.rows *
 540                 screen_desktop_layout.columns +
 541                 (screen_desktop_layout.columns - 1 -
 542                  c % screen_desktop_layout.columns);
 543         case OB_CORNER_BOTTOMRIGHT:
 544             return (screen_desktop_layout.rows - 1 -
 545                     r % screen_desktop_layout.rows) *
 546                 screen_desktop_layout.columns +
 547                 (screen_desktop_layout.columns - 1 -
 548                  c % screen_desktop_layout.columns);
 549         }
 550     case OB_ORIENTATION_VERT:
 551         switch (screen_desktop_layout.start_corner) {
 552         case OB_CORNER_TOPLEFT:
 553             return c % screen_desktop_layout.columns *
 554                 screen_desktop_layout.rows +
 555                 r % screen_desktop_layout.rows;
 556         case OB_CORNER_BOTTOMLEFT:
 557             return c % screen_desktop_layout.columns *
 558                 screen_desktop_layout.rows +
 559                 (screen_desktop_layout.rows - 1 -
 560                  r % screen_desktop_layout.rows);
 561         case OB_CORNER_TOPRIGHT:
 562             return (screen_desktop_layout.columns - 1 -
 563                     c % screen_desktop_layout.columns) *
 564                 screen_desktop_layout.rows +
 565                 r % screen_desktop_layout.rows;
 566         case OB_CORNER_BOTTOMRIGHT:
 567             return (screen_desktop_layout.columns - 1 -
 568                     c % screen_desktop_layout.columns) *
 569                 screen_desktop_layout.rows +
 570                 (screen_desktop_layout.rows - 1 -
 571                  r % screen_desktop_layout.rows);
 572         }
 573     }
 574     g_assert_not_reached();
 575     return 0;
 576 }
 577
 578 void screen_desktop_popup(guint d, gboolean show)
 579 {
 580     Rect *a;
 581
 582     if (!show) {
 583         pager_popup_hide(desktop_cycle_popup);
 584     } else {
 585         a = screen_physical_area_monitor(0);
 586         pager_popup_position(desktop_cycle_popup, CenterGravity,
 587                              a->x + a->width / 2, a->y + a->height / 2);
 588         /* XXX the size and the font extents need to be related on some level
 589          */
 590         pager_popup_size(desktop_cycle_popup, POPUP_WIDTH, POPUP_HEIGHT);
 591
 592         pager_popup_set_text_align(desktop_cycle_popup, RR_JUSTIFY_CENTER);
 593
 594         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
 595     }
 596 }
 597
 598 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 599                            gboolean dialog, gboolean done, gboolean cancel)
 600 {
 601     static gboolean first = TRUE;
 602     static guint origd, d;
 603     guint r, c;
 604
 605     if (cancel) {
 606         d = origd;
 607         goto done_cycle;
 608     } else if (done && dialog) {
 609         goto done_cycle;
 610     }
 611     if (first) {
 612         first = FALSE;
 613         d = origd = screen_desktop;
 614     }
 615
 616     get_row_col(d, &r, &c);
 617
 618     if (linear) {
 619         switch (dir) {
 620         case OB_DIRECTION_EAST:
 621             if (d < screen_num_desktops - 1)
 622                 ++d;
 623             else if (wrap)
 624                 d = 0;
 625             break;
 626         case OB_DIRECTION_WEST:
 627             if (d > 0)
 628                 --d;
 629             else if (wrap)
 630                 d = screen_num_desktops - 1;
 631             break;
 632         default:
 633             assert(0);
 634             return screen_desktop;
 635         }
 636     } else {
 637         switch (dir) {
 638         case OB_DIRECTION_EAST:
 639             ++c;
 640             if (c >= screen_desktop_layout.columns) {
 641                 if (wrap) {
 642                     c = 0;
 643                 } else {
 644                     d = screen_desktop;
 645                     goto show_cycle_dialog;
 646                 }
 647             }
 648             d = translate_row_col(r, c);
 649             if (d >= screen_num_desktops) {
 650                 if (wrap) {
 651                     ++c;
 652                 } else {
 653                     d = screen_desktop;
 654                     goto show_cycle_dialog;
 655                 }
 656             }
 657             break;
 658         case OB_DIRECTION_WEST:
 659             --c;
 660             if (c >= screen_desktop_layout.columns) {
 661                 if (wrap) {
 662                     c = screen_desktop_layout.columns - 1;
 663                 } else {
 664                     d = screen_desktop;
 665                     goto show_cycle_dialog;
 666                 }
 667             }
 668             d = translate_row_col(r, c);
 669             if (d >= screen_num_desktops) {
 670                 if (wrap) {
 671                     --c;
 672                 } else {
 673                     d = screen_desktop;
 674                     goto show_cycle_dialog;
 675                 }
 676             }
 677             break;
 678         case OB_DIRECTION_SOUTH:
 679             ++r;
 680             if (r >= screen_desktop_layout.rows) {
 681                 if (wrap) {
 682                     r = 0;
 683                 } else {
 684                     d = screen_desktop;
 685                     goto show_cycle_dialog;
 686                 }
 687             }
 688             d = translate_row_col(r, c);
 689             if (d >= screen_num_desktops) {
 690                 if (wrap) {
 691                     ++r;
 692                 } else {
 693                     d = screen_desktop;
 694                     goto show_cycle_dialog;
 695                 }
 696             }
 697             break;
 698         case OB_DIRECTION_NORTH:
 699             --r;
 700             if (r >= screen_desktop_layout.rows) {
 701                 if (wrap) {
 702                     r = screen_desktop_layout.rows - 1;
 703                 } else {
 704                     d = screen_desktop;
 705                     goto show_cycle_dialog;
 706                 }
 707             }
 708             d = translate_row_col(r, c);
 709             if (d >= screen_num_desktops) {
 710                 if (wrap) {
 711                     --r;
 712                 } else {
 713                     d = screen_desktop;
 714                     goto show_cycle_dialog;
 715                 }
 716             }
 717             break;
 718         default:
 719             assert(0);
 720             return d = screen_desktop;
 721         }
 722
 723         d = translate_row_col(r, c);
 724     }
 725
 726 show_cycle_dialog:
 727     if (dialog) {
 728         screen_desktop_popup(d, TRUE);
 729         return d;
 730     }
 731
 732 done_cycle:
 733     first = TRUE;
 734
 735     screen_desktop_popup(0, FALSE);
 736
 737     return d;
 738 }
 739
 740 void screen_update_layout()
 741 {
 742     ObOrientation orient;
 743     ObCorner corner;
 744     guint rows;
 745     guint cols;
 746     guint32 *data;
 747     guint num;
 748     gboolean valid = FALSE;
 749
 750     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 751                     net_desktop_layout, cardinal, &data, &num)) {
 752         if (num == 3 || num == 4) {
 753
 754             if (data[0] == prop_atoms.net_wm_orientation_vert)
 755                 orient = OB_ORIENTATION_VERT;
 756             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 757                 orient = OB_ORIENTATION_HORZ;
 758             else
 759                 goto screen_update_layout_bail;
 760
 761             if (num < 4)
 762                 corner = OB_CORNER_TOPLEFT;
 763             else {
 764                 if (data[3] == prop_atoms.net_wm_topleft)
 765                     corner = OB_CORNER_TOPLEFT;
 766                 else if (data[3] == prop_atoms.net_wm_topright)
 767                     corner = OB_CORNER_TOPRIGHT;
 768                 else if (data[3] == prop_atoms.net_wm_bottomright)
 769                     corner = OB_CORNER_BOTTOMRIGHT;
 770                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 771                     corner = OB_CORNER_BOTTOMLEFT;
 772                 else
 773                     goto screen_update_layout_bail;
 774             }
 775
 776             cols = data[1];
 777             rows = data[2];
 778
 779             /* fill in a zero rows/columns */
 780             if ((cols == 0 && rows == 0)) { /* both 0's is bad data.. */
 781                 goto screen_update_layout_bail;
 782             } else {
 783                 if (cols == 0) {
 784                     cols = screen_num_desktops / rows;
 785                     if (rows * cols < screen_num_desktops)
 786                         cols++;
 787                     if (rows * cols >= screen_num_desktops + cols)
 788                         rows--;
 789                 } else if (rows == 0) {
 790                     rows = screen_num_desktops / cols;
 791                     if (cols * rows < screen_num_desktops)
 792                         rows++;
 793                     if (cols * rows >= screen_num_desktops + rows)
 794                         cols--;
 795                 }
 796             }
 797
 798             /* bounds checking */
 799             if (orient == OB_ORIENTATION_HORZ) {
 800                 cols = MIN(screen_num_desktops, cols);
 801                 rows = MIN(rows, (screen_num_desktops + cols - 1) / cols);
 802                 cols = screen_num_desktops / rows +
 803                     !!(screen_num_desktops % rows);
 804             } else {
 805                 rows = MIN(screen_num_desktops, rows);
 806                 cols = MIN(cols, (screen_num_desktops + rows - 1) / rows);
 807                 rows = screen_num_desktops / cols +
 808                     !!(screen_num_desktops % cols);
 809             }
 810
 811             valid = TRUE;
 812         }
 813     screen_update_layout_bail:
 814         g_free(data);
 815     }
 816
 817     if (!valid) {
 818         /* defaults */
 819         orient = OB_ORIENTATION_HORZ;
 820         corner = OB_CORNER_TOPLEFT;
 821         rows = 1;
 822         cols = screen_num_desktops;
 823     }
 824
 825     screen_desktop_layout.orientation = orient;
 826     screen_desktop_layout.start_corner = corner;
 827     screen_desktop_layout.rows = rows;
 828     screen_desktop_layout.columns = cols;
 829 }
 830
 831 void screen_update_desktop_names()
 832 {
 833     guint i;
 834
 835     /* empty the array */
 836     g_strfreev(screen_desktop_names);
 837     screen_desktop_names = NULL;
 838
 839     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 840                    net_desktop_names, utf8, &screen_desktop_names))
 841         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 842     else
 843         i = 0;
 844     if (i <= screen_num_desktops) {
 845         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
 846                                        screen_num_desktops + 1);
 847         screen_desktop_names[screen_num_desktops] = NULL;
 848         for (; i < screen_num_desktops; ++i)
 849             screen_desktop_names[i] = g_strdup_printf("Desktop %i", i + 1);
 850     }
 851 }
 852
 853 void screen_show_desktop(gboolean show)
 854 {
 855     GList *it;
 856
 857     if (show == screen_showing_desktop) return; /* no change */
 858
 859     screen_showing_desktop = show;
 860
 861     if (show) {
 862         /* bottom to top */
 863         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 864             if (WINDOW_IS_CLIENT(it->data)) {
 865                 ObClient *client = it->data;
 866                 client_showhide(client);
 867             }
 868         }
 869     } else {
 870         /* top to bottom */
 871         for (it = stacking_list; it; it = g_list_next(it)) {
 872             if (WINDOW_IS_CLIENT(it->data)) {
 873                 ObClient *client = it->data;
 874                 client_showhide(client);
 875             }
 876         }
 877     }
 878
 879     if (show) {
 880         /* focus desktop */
 881         for (it = focus_order; it; it = g_list_next(it)) {
 882             ObClient *c = it->data;
 883             if (c->type == OB_CLIENT_TYPE_DESKTOP &&
 884                 (c->desktop == screen_desktop || c->desktop == DESKTOP_ALL) &&
 885                 client_focus(it->data))
 886                 break;
 887         }
 888     } else {
 889         focus_fallback(TRUE);
 890     }
 891
 892     show = !!show; /* make it boolean */
 893     PROP_SET32(RootWindow(ob_display, ob_screen),
 894                net_showing_desktop, cardinal, show);
 895 }
 896
 897 void screen_install_colormap(ObClient *client, gboolean install)
 898 {
 899     XWindowAttributes wa;
 900
 901     if (client == NULL) {
 902         if (install)
 903             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 904         else
 905             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 906     } else {
 907         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
 908             wa.colormap != None) {
 909             xerror_set_ignore(TRUE);
 910             if (install)
 911                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 912             else
 913                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 914             xerror_set_ignore(FALSE);
 915         }
 916     }
 917 }
 918
 919 static inline void
 920 screen_area_add_strut_left(const StrutPartial *s, const Rect *monitor_area,
 921                            gint edge, Strut *ret)
 922 {
 923     if (s->left &&
 924         ((s->left_end <= s->left_start) ||
 925          (RECT_TOP(*monitor_area) < s->left_end &&
 926           RECT_BOTTOM(*monitor_area) > s->left_start)))
 927         ret->left = MAX(ret->left, edge);
 928 }
 929
 930 static inline void
 931 screen_area_add_strut_top(const StrutPartial *s, const Rect *monitor_area,
 932                           gint edge, Strut *ret)
 933 {
 934     if (s->top &&
 935         ((s->top_end <= s->top_start) ||
 936          (RECT_LEFT(*monitor_area) < s->top_end &&
 937           RECT_RIGHT(*monitor_area) > s->top_start)))
 938         ret->top = MAX(ret->top, edge);
 939 }
 940
 941 static inline void
 942 screen_area_add_strut_right(const StrutPartial *s, const Rect *monitor_area,
 943                             gint edge, Strut *ret)
 944 {
 945     if (s->right &&
 946         ((s->right_end <= s->right_start) ||
 947          (RECT_TOP(*monitor_area) < s->right_end &&
 948           RECT_BOTTOM(*monitor_area) > s->right_start)))
 949         ret->right = MAX(ret->right, edge);
 950 }
 951
 952 static inline void
 953 screen_area_add_strut_bottom(const StrutPartial *s, const Rect *monitor_area,
 954                              gint edge, Strut *ret)
 955 {
 956     if (s->bottom &&
 957         ((s->bottom_end <= s->bottom_start) ||
 958          (RECT_LEFT(*monitor_area) < s->bottom_end &&
 959           RECT_RIGHT(*monitor_area) > s->bottom_start)))
 960         ret->bottom = MAX(ret->bottom, edge);
 961 }
 962
 963 void screen_update_areas()
 964 {
 965     guint i, x;
 966     gulong *dims;
 967     GList *it;
 968     gint o;
 969
 970     g_free(monitor_area);
 971     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
 972
 973     if (area) {
 974         for (i = 0; area[i]; ++i)
 975             g_free(area[i]);
 976         g_free(area);
 977     }
 978
 979     area = g_new(Rect*, screen_num_desktops + 2);
 980     for (i = 0; i < screen_num_desktops + 1; ++i)
 981         area[i] = g_new0(Rect, screen_num_monitors + 1);
 982     area[i] = NULL;
 983
 984     dims = g_new(gulong, 4 * screen_num_desktops);
 985
 986     for (i = 0; i < screen_num_desktops + 1; ++i) {
 987         Strut *struts;
 988         gint l, r, t, b;
 989
 990         struts = g_new0(Strut, screen_num_monitors);
 991
 992         /* calc the xinerama areas */
 993         for (x = 0; x < screen_num_monitors; ++x) {
 994             area[i][x] = monitor_area[x];
 995             if (x == 0) {
 996                 l = monitor_area[x].x;
 997                 t = monitor_area[x].y;
 998                 r = monitor_area[x].x + monitor_area[x].width - 1;
 999                 b = monitor_area[x].y + monitor_area[x].height - 1;
1000             } else {
1001                 l = MIN(l, monitor_area[x].x);
1002                 t = MIN(t, monitor_area[x].y);
1003                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
1004                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
1005             }
1006         }
1007         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
1008
1009         /* apply the struts */
1010
1011         /* find the left-most xin heads, i do this in 2 loops :| */
1012         o = area[i][0].x;
1013         for (x = 1; x < screen_num_monitors; ++x)
1014             o = MIN(o, area[i][x].x);
1015
1016         for (x = 0; x < screen_num_monitors; ++x) {
1017             for (it = client_list; it; it = g_list_next(it)) {
1018                 ObClient *c = it->data;
1019                 screen_area_add_strut_left(&c->strut,
1020                                            &monitor_area[x],
1021                                            o + c->strut.left - area[i][x].x,
1022                                            &struts[x]);
1023             }
1024             screen_area_add_strut_left(&dock_strut,
1025                                        &monitor_area[x],
1026                                        o + dock_strut.left - area[i][x].x,
1027                                        &struts[x]);
1028
1029             area[i][x].x += struts[x].left;
1030             area[i][x].width -= struts[x].left;
1031         }
1032
1033         /* find the top-most xin heads, i do this in 2 loops :| */
1034         o = area[i][0].y;
1035         for (x = 1; x < screen_num_monitors; ++x)
1036             o = MIN(o, area[i][x].y);
1037
1038         for (x = 0; x < screen_num_monitors; ++x) {
1039             for (it = client_list; it; it = g_list_next(it)) {
1040                 ObClient *c = it->data;
1041                 screen_area_add_strut_top(&c->strut,
1042                                            &monitor_area[x],
1043                                            o + c->strut.top - area[i][x].y,
1044                                            &struts[x]);
1045             }
1046             screen_area_add_strut_top(&dock_strut,
1047                                       &monitor_area[x],
1048                                       o + dock_strut.top - area[i][x].y,
1049                                       &struts[x]);
1050
1051             area[i][x].y += struts[x].top;
1052             area[i][x].height -= struts[x].top;
1053         }
1054
1055         /* find the right-most xin heads, i do this in 2 loops :| */
1056         o = area[i][0].x + area[i][0].width - 1;
1057         for (x = 1; x < screen_num_monitors; ++x)
1058             o = MAX(o, area[i][x].x + area[i][x].width - 1);
1059
1060         for (x = 0; x < screen_num_monitors; ++x) {
1061             for (it = client_list; it; it = g_list_next(it)) {
1062                 ObClient *c = it->data;
1063                 screen_area_add_strut_right(&c->strut,
1064                                            &monitor_area[x],
1065                                            (area[i][x].x +
1066                                             area[i][x].width - 1) -
1067                                             (o - c->strut.right),
1068                                             &struts[x]);
1069             }
1070             screen_area_add_strut_right(&dock_strut,
1071                                         &monitor_area[x],
1072                                         (area[i][x].x +
1073                                          area[i][x].width - 1) -
1074                                         (o - dock_strut.right),
1075                                         &struts[x]);
1076
1077             area[i][x].width -= struts[x].right;
1078         }
1079
1080         /* find the bottom-most xin heads, i do this in 2 loops :| */
1081         o = area[i][0].y + area[i][0].height - 1;
1082         for (x = 1; x < screen_num_monitors; ++x)
1083             o = MAX(o, area[i][x].y + area[i][x].height - 1);
1084
1085         for (x = 0; x < screen_num_monitors; ++x) {
1086             for (it = client_list; it; it = g_list_next(it)) {
1087                 ObClient *c = it->data;
1088                 screen_area_add_strut_bottom(&c->strut,
1089                                              &monitor_area[x],
1090                                              (area[i][x].y +
1091                                               area[i][x].height - 1) - \
1092                                              (o - c->strut.bottom),
1093                                              &struts[x]);
1094             }
1095             screen_area_add_strut_bottom(&dock_strut,
1096                                          &monitor_area[x],
1097                                          (area[i][x].y +
1098                                           area[i][x].height - 1) - \
1099                                          (o - dock_strut.bottom),
1100                                          &struts[x]);
1101
1102             area[i][x].height -= struts[x].bottom;
1103         }
1104
1105         l = RECT_LEFT(area[i][0]);
1106         t = RECT_TOP(area[i][0]);
1107         r = RECT_RIGHT(area[i][0]);
1108         b = RECT_BOTTOM(area[i][0]);
1109         for (x = 1; x < screen_num_monitors; ++x) {
1110             l = MIN(l, RECT_LEFT(area[i][x]));
1111             t = MIN(l, RECT_TOP(area[i][x]));
1112             r = MAX(r, RECT_RIGHT(area[i][x]));
1113             b = MAX(b, RECT_BOTTOM(area[i][x]));
1114         }
1115         RECT_SET(area[i][screen_num_monitors], l, t,
1116                  r - l + 1, b - t + 1);
1117
1118         /* XXX optimize when this is run? */
1119
1120         /* the area has changed, adjust all the maximized
1121            windows */
1122         for (it = client_list; it; it = g_list_next(it)) {
1123             ObClient *c = it->data;
1124             if (i < screen_num_desktops) {
1125                 if (c->desktop == i)
1126                     client_reconfigure(c);
1127             } else if (c->desktop == DESKTOP_ALL)
1128                 client_reconfigure(c);
1129         }
1130         if (i < screen_num_desktops) {
1131             /* don't set these for the 'all desktops' area */
1132             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1133             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1134             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1135             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1136         }
1137
1138         g_free(struts);
1139     }
1140
1141     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1142                 dims, 4 * screen_num_desktops);
1143
1144     g_free(dims);
1145 }
1146
1147 Rect *screen_area(guint desktop)
1148 {
1149     return screen_area_monitor(desktop, screen_num_monitors);
1150 }
1151
1152 Rect *screen_area_monitor(guint desktop, guint head)
1153 {
1154     if (head > screen_num_monitors)
1155         return NULL;
1156     if (desktop >= screen_num_desktops) {
1157         if (desktop == DESKTOP_ALL)
1158             return &area[screen_num_desktops][head];
1159         return NULL;
1160     }
1161     return &area[desktop][head];
1162 }
1163
1164 guint screen_find_monitor(Rect *search)
1165 {
1166     guint i;
1167     guint most = 0;
1168     guint mostv = 0;
1169
1170     for (i = 0; i < screen_num_monitors; ++i) {
1171         Rect *area = screen_physical_area_monitor(i);
1172         if (RECT_INTERSECTS_RECT(*area, *search)) {
1173             Rect r;
1174             guint v;
1175
1176             RECT_SET_INTERSECTION(r, *area, *search);
1177             v = r.width * r.height;
1178
1179             if (v > mostv) {
1180                 mostv = v;
1181                 most = i;
1182             }
1183         }
1184     }
1185     return most;
1186 }
1187
1188 Rect *screen_physical_area()
1189 {
1190     return screen_physical_area_monitor(screen_num_monitors);
1191 }
1192
1193 Rect *screen_physical_area_monitor(guint head)
1194 {
1195     if (head > screen_num_monitors)
1196         return NULL;
1197     return &monitor_area[head];
1198 }
1199
1200 void screen_set_root_cursor()
1201 {
1202     if (sn_app_starting())
1203         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1204                       ob_cursor(OB_CURSOR_BUSY));
1205     else
1206         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1207                       ob_cursor(OB_CURSOR_POINTER));
1208 }
1209
1210 gboolean screen_pointer_pos(gint *x, gint *y)
1211 {
1212     Window w;
1213     gint i;
1214     guint u;
1215
1216     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1217                            &w, &w, x, y, &i, &i, &u);
1218 }