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