Dogcows Code - chaz/openbox/blob - 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 = 53;
 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.net_frame_extents;
 262     supported[i++] = prop_atoms.ob_wm_state_undecorated;
 263     g_assert(i == num_support);
 264 /*
 265   supported[] = prop_atoms.net_wm_action_stick;
 266 */
 267
 268     PROP_SETA32(RootWindow(ob_display, ob_screen),
 269                 net_supported, atom, supported, num_support);
 270     g_free(supported);
 271
 272     return TRUE;
 273 }
 274
 275 void screen_startup(gboolean reconfig)
 276 {
 277     GSList *it;
 278     guint i;
 279
 280     desktop_cycle_popup = pager_popup_new(FALSE);
 281
 282     if (!reconfig)
 283         /* get the initial size */
 284         screen_resize();
 285
 286     /* set the names */
 287     screen_desktop_names = g_new(gchar*,
 288                                  g_slist_length(config_desktops_names) + 1);
 289     for (i = 0, it = config_desktops_names; it; ++i, it = g_slist_next(it))
 290         screen_desktop_names[i] = it->data; /* dont strdup */
 291     screen_desktop_names[i] = NULL;
 292     PROP_SETSS(RootWindow(ob_display, ob_screen),
 293                net_desktop_names, screen_desktop_names);
 294     g_free(screen_desktop_names); /* dont free the individual strings */
 295     screen_desktop_names = NULL;
 296
 297     if (!reconfig)
 298         screen_num_desktops = 0;
 299     screen_set_num_desktops(config_desktops_num);
 300     if (!reconfig) {
 301         screen_set_desktop(MIN(config_screen_firstdesk, screen_num_desktops)
 302                            - 1);
 303
 304         /* don't start in showing-desktop mode */
 305         screen_showing_desktop = FALSE;
 306         PROP_SET32(RootWindow(ob_display, ob_screen),
 307                    net_showing_desktop, cardinal, screen_showing_desktop);
 308
 309         screen_update_layout();
 310     }
 311 }
 312
 313 void screen_shutdown(gboolean reconfig)
 314 {
 315     Rect **r;
 316
 317     pager_popup_free(desktop_cycle_popup);
 318
 319     if (!reconfig) {
 320         XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 321                      NoEventMask);
 322
 323         /* we're not running here no more! */
 324         PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 325         /* not without us */
 326         PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 327         /* don't keep this mode */
 328         PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 329
 330         XDestroyWindow(ob_display, screen_support_win);
 331     }
 332
 333     g_strfreev(screen_desktop_names);
 334     screen_desktop_names = NULL;
 335     for (r = area; *r; ++r)
 336         g_free(*r);
 337     g_free(area);
 338     area = NULL;
 339 }
 340
 341 void screen_resize()
 342 {
 343     static gint oldw = 0, oldh = 0;
 344     gint w, h;
 345     GList *it;
 346     gulong geometry[2];
 347
 348     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 349     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 350
 351     if (w == oldw && h == oldh) return;
 352
 353     oldw = w; oldh = h;
 354
 355     /* Set the _NET_DESKTOP_GEOMETRY hint */
 356     screen_physical_size.width = geometry[0] = w;
 357     screen_physical_size.height = geometry[1] = h;
 358     PROP_SETA32(RootWindow(ob_display, ob_screen),
 359                 net_desktop_geometry, cardinal, geometry, 2);
 360
 361     if (ob_state() == OB_STATE_STARTING)
 362         return;
 363
 364     screen_update_areas();
 365     dock_configure();
 366
 367     for (it = client_list; it; it = g_list_next(it))
 368         client_move_onscreen(it->data, FALSE);
 369 }
 370
 371 void screen_set_num_desktops(guint num)
 372 {
 373     guint i, old;
 374     gulong *viewport;
 375     GList *it;
 376
 377     g_assert(num > 0);
 378
 379     if (screen_num_desktops == num) return;
 380
 381     old = screen_num_desktops;
 382     screen_num_desktops = num;
 383     PROP_SET32(RootWindow(ob_display, ob_screen),
 384                net_number_of_desktops, cardinal, num);
 385
 386     /* set the viewport hint */
 387     viewport = g_new0(gulong, num * 2);
 388     PROP_SETA32(RootWindow(ob_display, ob_screen),
 389                 net_desktop_viewport, cardinal, viewport, num * 2);
 390     g_free(viewport);
 391
 392     /* the number of rows/columns will differ */
 393     screen_update_layout();
 394
 395     /* may be some unnamed desktops that we need to fill in with names */
 396     screen_update_desktop_names();
 397
 398     /* move windows on desktops that will no longer exist! */
 399     for (it = client_list; it; it = g_list_next(it)) {
 400         ObClient *c = it->data;
 401         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 402             client_set_desktop(c, num - 1, FALSE);
 403     }
 404
 405     /* change our struts/area to match (after moving windows) */
 406     screen_update_areas();
 407
 408     /* change our desktop if we're on one that no longer exists! */
 409     if (screen_desktop >= screen_num_desktops)
 410         screen_set_desktop(num - 1);
 411
 412    /* update the focus lists */
 413     /* free our lists for the desktops which have disappeared */
 414     for (i = num; i < old; ++i)
 415         g_list_free(focus_order[i]);
 416     /* realloc the array */
 417     focus_order = g_renew(GList*, focus_order, num);
 418     /* set the new lists to be empty */
 419     for (i = old; i < num; ++i)
 420         focus_order[i] = NULL;
 421 }
 422
 423 void screen_set_desktop(guint num)
 424 {
 425     GList *it;
 426     guint old;
 427
 428     g_assert(num < screen_num_desktops);
 429
 430     old = screen_desktop;
 431     screen_desktop = num;
 432     PROP_SET32(RootWindow(ob_display, ob_screen),
 433                net_current_desktop, cardinal, num);
 434
 435     if (old == num) return;
 436
 437     screen_last_desktop = old;
 438
 439     ob_debug("Moving to desktop %d\n", num+1);
 440
 441     if (moveresize_client)
 442         client_set_desktop(moveresize_client, num, TRUE);
 443
 444     /* show windows before hiding the rest to lessen the enter/leave events */
 445
 446     /* show windows from top to bottom */
 447     for (it = stacking_list; it; it = g_list_next(it)) {
 448         if (WINDOW_IS_CLIENT(it->data)) {
 449             ObClient *c = it->data;
 450             if (client_should_show(c))
 451                 frame_show(c->frame);
 452         }
 453     }
 454
 455     /* hide windows from bottom to top */
 456     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 457         if (WINDOW_IS_CLIENT(it->data)) {
 458             ObClient *c = it->data;
 459             if (c->frame->visible && !client_should_show(c))
 460                 frame_hide(c->frame);
 461         }
 462     }
 463
 464     event_ignore_queued_enters();
 465
 466     focus_hilite = focus_fallback_target(OB_FOCUS_FALLBACK_NOFOCUS);
 467     if (focus_hilite) {
 468         frame_adjust_focus(focus_hilite->frame, TRUE);
 469
 470         /*!
 471           When this focus_client check is not used, you can end up with races,
 472           as demonstrated with gnome-panel, sometmies the window you click on
 473           another desktop ends up losing focus cuz of the focus change here.
 474         */
 475         /*if (!focus_client)*/
 476         client_focus(focus_hilite);
 477     }
 478 }
 479
 480 static void get_row_col(guint d, guint *r, guint *c)
 481 {
 482     switch (screen_desktop_layout.orientation) {
 483     case OB_ORIENTATION_HORZ:
 484         switch (screen_desktop_layout.start_corner) {
 485         case OB_CORNER_TOPLEFT:
 486             *r = d / screen_desktop_layout.columns;
 487             *c = d % screen_desktop_layout.columns;
 488             break;
 489         case OB_CORNER_BOTTOMLEFT:
 490             *r = screen_desktop_layout.rows - 1 -
 491                 d / screen_desktop_layout.columns;
 492             *c = d % screen_desktop_layout.columns;
 493             break;
 494         case OB_CORNER_TOPRIGHT:
 495             *r = d / screen_desktop_layout.columns;
 496             *c = screen_desktop_layout.columns - 1 -
 497                 d % screen_desktop_layout.columns;
 498             break;
 499         case OB_CORNER_BOTTOMRIGHT:
 500             *r = screen_desktop_layout.rows - 1 -
 501                 d / screen_desktop_layout.columns;
 502             *c = screen_desktop_layout.columns - 1 -
 503                 d % screen_desktop_layout.columns;
 504             break;
 505         }
 506         break;
 507     case OB_ORIENTATION_VERT:
 508         switch (screen_desktop_layout.start_corner) {
 509         case OB_CORNER_TOPLEFT:
 510             *r = d % screen_desktop_layout.rows;
 511             *c = d / screen_desktop_layout.rows;
 512             break;
 513         case OB_CORNER_BOTTOMLEFT:
 514             *r = screen_desktop_layout.rows - 1 -
 515                 d % screen_desktop_layout.rows;
 516             *c = d / screen_desktop_layout.rows;
 517             break;
 518         case OB_CORNER_TOPRIGHT:
 519             *r = d % screen_desktop_layout.rows;
 520             *c = screen_desktop_layout.columns - 1 -
 521                 d / screen_desktop_layout.rows;
 522             break;
 523         case OB_CORNER_BOTTOMRIGHT:
 524             *r = screen_desktop_layout.rows - 1 -
 525                 d % screen_desktop_layout.rows;
 526             *c = screen_desktop_layout.columns - 1 -
 527                 d / screen_desktop_layout.rows;
 528             break;
 529         }
 530         break;
 531     }
 532 }
 533
 534 static guint translate_row_col(guint r, guint c)
 535 {
 536     switch (screen_desktop_layout.orientation) {
 537     case OB_ORIENTATION_HORZ:
 538         switch (screen_desktop_layout.start_corner) {
 539         case OB_CORNER_TOPLEFT:
 540             return r % screen_desktop_layout.rows *
 541                 screen_desktop_layout.columns +
 542                 c % screen_desktop_layout.columns;
 543         case OB_CORNER_BOTTOMLEFT:
 544             return (screen_desktop_layout.rows - 1 -
 545                     r % screen_desktop_layout.rows) *
 546                 screen_desktop_layout.columns +
 547                 c % screen_desktop_layout.columns;
 548         case OB_CORNER_TOPRIGHT:
 549             return r % screen_desktop_layout.rows *
 550                 screen_desktop_layout.columns +
 551                 (screen_desktop_layout.columns - 1 -
 552                  c % screen_desktop_layout.columns);
 553         case OB_CORNER_BOTTOMRIGHT:
 554             return (screen_desktop_layout.rows - 1 -
 555                     r % screen_desktop_layout.rows) *
 556                 screen_desktop_layout.columns +
 557                 (screen_desktop_layout.columns - 1 -
 558                  c % screen_desktop_layout.columns);
 559         }
 560     case OB_ORIENTATION_VERT:
 561         switch (screen_desktop_layout.start_corner) {
 562         case OB_CORNER_TOPLEFT:
 563             return c % screen_desktop_layout.columns *
 564                 screen_desktop_layout.rows +
 565                 r % screen_desktop_layout.rows;
 566         case OB_CORNER_BOTTOMLEFT:
 567             return c % screen_desktop_layout.columns *
 568                 screen_desktop_layout.rows +
 569                 (screen_desktop_layout.rows - 1 -
 570                  r % screen_desktop_layout.rows);
 571         case OB_CORNER_TOPRIGHT:
 572             return (screen_desktop_layout.columns - 1 -
 573                     c % screen_desktop_layout.columns) *
 574                 screen_desktop_layout.rows +
 575                 r % screen_desktop_layout.rows;
 576         case OB_CORNER_BOTTOMRIGHT:
 577             return (screen_desktop_layout.columns - 1 -
 578                     c % screen_desktop_layout.columns) *
 579                 screen_desktop_layout.rows +
 580                 (screen_desktop_layout.rows - 1 -
 581                  r % screen_desktop_layout.rows);
 582         }
 583     }
 584     g_assert_not_reached();
 585     return 0;
 586 }
 587
 588 void screen_desktop_popup(guint d, gboolean show)
 589 {
 590     Rect *a;
 591
 592     if (!show) {
 593         pager_popup_hide(desktop_cycle_popup);
 594     } else {
 595         a = screen_physical_area_monitor(0);
 596         pager_popup_position(desktop_cycle_popup, CenterGravity,
 597                              a->x + a->width / 2, a->y + a->height / 2);
 598         /* XXX the size and the font extents need to be related on some level
 599          */
 600         pager_popup_size(desktop_cycle_popup, POPUP_WIDTH, POPUP_HEIGHT);
 601
 602         pager_popup_set_text_align(desktop_cycle_popup, RR_JUSTIFY_CENTER);
 603
 604         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
 605     }
 606 }
 607
 608 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 609                            gboolean dialog, gboolean done, gboolean cancel)
 610 {
 611     static gboolean first = TRUE;
 612     static guint origd, d;
 613     guint r, c;
 614
 615     if (cancel) {
 616         d = origd;
 617         goto done_cycle;
 618     } else if (done && dialog) {
 619         goto done_cycle;
 620     }
 621     if (first) {
 622         first = FALSE;
 623         d = origd = screen_desktop;
 624     }
 625
 626     get_row_col(d, &r, &c);
 627
 628     if (linear) {
 629         switch (dir) {
 630         case OB_DIRECTION_EAST:
 631             if (d < screen_num_desktops - 1)
 632                 ++d;
 633             else if (wrap)
 634                 d = 0;
 635             break;
 636         case OB_DIRECTION_WEST:
 637             if (d > 0)
 638                 --d;
 639             else if (wrap)
 640                 d = screen_num_desktops - 1;
 641             break;
 642         default:
 643             assert(0);
 644             return screen_desktop;
 645         }
 646     } else {
 647         switch (dir) {
 648         case OB_DIRECTION_EAST:
 649             ++c;
 650             if (c >= screen_desktop_layout.columns) {
 651                 if (wrap) {
 652                     c = 0;
 653                 } else {
 654                     d = screen_desktop;
 655                     goto show_cycle_dialog;
 656                 }
 657             }
 658             d = translate_row_col(r, c);
 659             if (d >= screen_num_desktops) {
 660                 if (wrap) {
 661                     ++c;
 662                 } else {
 663                     d = screen_desktop;
 664                     goto show_cycle_dialog;
 665                 }
 666             }
 667             break;
 668         case OB_DIRECTION_WEST:
 669             --c;
 670             if (c >= screen_desktop_layout.columns) {
 671                 if (wrap) {
 672                     c = screen_desktop_layout.columns - 1;
 673                 } else {
 674                     d = screen_desktop;
 675                     goto show_cycle_dialog;
 676                 }
 677             }
 678             d = translate_row_col(r, c);
 679             if (d >= screen_num_desktops) {
 680                 if (wrap) {
 681                     --c;
 682                 } else {
 683                     d = screen_desktop;
 684                     goto show_cycle_dialog;
 685                 }
 686             }
 687             break;
 688         case OB_DIRECTION_SOUTH:
 689             ++r;
 690             if (r >= screen_desktop_layout.rows) {
 691                 if (wrap) {
 692                     r = 0;
 693                 } else {
 694                     d = screen_desktop;
 695                     goto show_cycle_dialog;
 696                 }
 697             }
 698             d = translate_row_col(r, c);
 699             if (d >= screen_num_desktops) {
 700                 if (wrap) {
 701                     ++r;
 702                 } else {
 703                     d = screen_desktop;
 704                     goto show_cycle_dialog;
 705                 }
 706             }
 707             break;
 708         case OB_DIRECTION_NORTH:
 709             --r;
 710             if (r >= screen_desktop_layout.rows) {
 711                 if (wrap) {
 712                     r = screen_desktop_layout.rows - 1;
 713                 } else {
 714                     d = screen_desktop;
 715                     goto show_cycle_dialog;
 716                 }
 717             }
 718             d = translate_row_col(r, c);
 719             if (d >= screen_num_desktops) {
 720                 if (wrap) {
 721                     --r;
 722                 } else {
 723                     d = screen_desktop;
 724                     goto show_cycle_dialog;
 725                 }
 726             }
 727             break;
 728         default:
 729             assert(0);
 730             return d = screen_desktop;
 731         }
 732
 733         d = translate_row_col(r, c);
 734     }
 735
 736 show_cycle_dialog:
 737     if (dialog) {
 738         screen_desktop_popup(d, TRUE);
 739         return d;
 740     }
 741
 742 done_cycle:
 743     first = TRUE;
 744
 745     screen_desktop_popup(0, FALSE);
 746
 747     return d;
 748 }
 749
 750 void screen_update_layout()
 751 {
 752     ObOrientation orient;
 753     ObCorner corner;
 754     guint rows;
 755     guint cols;
 756     guint32 *data;
 757     guint num;
 758     gboolean valid = FALSE;
 759
 760     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 761                     net_desktop_layout, cardinal, &data, &num)) {
 762         if (num == 3 || num == 4) {
 763
 764             if (data[0] == prop_atoms.net_wm_orientation_vert)
 765                 orient = OB_ORIENTATION_VERT;
 766             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 767                 orient = OB_ORIENTATION_HORZ;
 768             else
 769                 goto screen_update_layout_bail;
 770
 771             if (num < 4)
 772                 corner = OB_CORNER_TOPLEFT;
 773             else {
 774                 if (data[3] == prop_atoms.net_wm_topleft)
 775                     corner = OB_CORNER_TOPLEFT;
 776                 else if (data[3] == prop_atoms.net_wm_topright)
 777                     corner = OB_CORNER_TOPRIGHT;
 778                 else if (data[3] == prop_atoms.net_wm_bottomright)
 779                     corner = OB_CORNER_BOTTOMRIGHT;
 780                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 781                     corner = OB_CORNER_BOTTOMLEFT;
 782                 else
 783                     goto screen_update_layout_bail;
 784             }
 785
 786             cols = data[1];
 787             rows = data[2];
 788
 789             /* fill in a zero rows/columns */
 790             if ((cols == 0 && rows == 0)) { /* both 0's is bad data.. */
 791                 goto screen_update_layout_bail;
 792             } else {
 793                 if (cols == 0) {
 794                     cols = screen_num_desktops / rows;
 795                     if (rows * cols < screen_num_desktops)
 796                         cols++;
 797                     if (rows * cols >= screen_num_desktops + cols)
 798                         rows--;
 799                 } else if (rows == 0) {
 800                     rows = screen_num_desktops / cols;
 801                     if (cols * rows < screen_num_desktops)
 802                         rows++;
 803                     if (cols * rows >= screen_num_desktops + rows)
 804                         cols--;
 805                 }
 806             }
 807
 808             /* bounds checking */
 809             if (orient == OB_ORIENTATION_HORZ) {
 810                 cols = MIN(screen_num_desktops, cols);
 811                 rows = MIN(rows, (screen_num_desktops + cols - 1) / cols);
 812                 cols = screen_num_desktops / rows +
 813                     !!(screen_num_desktops % rows);
 814             } else {
 815                 rows = MIN(screen_num_desktops, rows);
 816                 cols = MIN(cols, (screen_num_desktops + rows - 1) / rows);
 817                 rows = screen_num_desktops / cols +
 818                     !!(screen_num_desktops % cols);
 819             }
 820
 821             valid = TRUE;
 822         }
 823     screen_update_layout_bail:
 824         g_free(data);
 825     }
 826
 827     if (!valid) {
 828         /* defaults */
 829         orient = OB_ORIENTATION_HORZ;
 830         corner = OB_CORNER_TOPLEFT;
 831         rows = 1;
 832         cols = screen_num_desktops;
 833     }
 834
 835     screen_desktop_layout.orientation = orient;
 836     screen_desktop_layout.start_corner = corner;
 837     screen_desktop_layout.rows = rows;
 838     screen_desktop_layout.columns = cols;
 839 }
 840
 841 void screen_update_desktop_names()
 842 {
 843     guint i;
 844
 845     /* empty the array */
 846     g_strfreev(screen_desktop_names);
 847     screen_desktop_names = NULL;
 848
 849     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 850                    net_desktop_names, utf8, &screen_desktop_names))
 851         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 852     else
 853         i = 0;
 854     if (i <= screen_num_desktops) {
 855         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
 856                                        screen_num_desktops + 1);
 857         screen_desktop_names[screen_num_desktops] = NULL;
 858         for (; i < screen_num_desktops; ++i)
 859             screen_desktop_names[i] = g_strdup_printf("Desktop %i", i + 1);
 860     }
 861 }
 862
 863 void screen_show_desktop(gboolean show)
 864 {
 865     GList *it;
 866
 867     if (show == screen_showing_desktop) return; /* no change */
 868
 869     screen_showing_desktop = show;
 870
 871     if (show) {
 872         /* bottom to top */
 873         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 874             if (WINDOW_IS_CLIENT(it->data)) {
 875                 ObClient *client = it->data;
 876                 if (client->frame->visible && !client_should_show(client))
 877                     frame_hide(client->frame);
 878             }
 879         }
 880     } else {
 881         /* top to bottom */
 882         for (it = stacking_list; it; it = g_list_next(it)) {
 883             if (WINDOW_IS_CLIENT(it->data)) {
 884                 ObClient *client = it->data;
 885                 if (!client->frame->visible && client_should_show(client))
 886                     frame_show(client->frame);
 887             }
 888         }
 889     }
 890
 891     if (show) {
 892         /* focus desktop */
 893         for (it = focus_order[screen_desktop]; it; it = g_list_next(it))
 894             if (((ObClient*)it->data)->type == OB_CLIENT_TYPE_DESKTOP &&
 895                 client_focus(it->data))
 896                 break;
 897     } else {
 898         focus_fallback(OB_FOCUS_FALLBACK_NOFOCUS);
 899     }
 900
 901     show = !!show; /* make it boolean */
 902     PROP_SET32(RootWindow(ob_display, ob_screen),
 903                net_showing_desktop, cardinal, show);
 904 }
 905
 906 void screen_install_colormap(ObClient *client, gboolean install)
 907 {
 908     XWindowAttributes wa;
 909
 910     if (client == NULL) {
 911         if (install)
 912             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 913         else
 914             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 915     } else {
 916         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
 917             wa.colormap != None) {
 918             xerror_set_ignore(TRUE);
 919             if (install)
 920                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 921             else
 922                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 923             xerror_set_ignore(FALSE);
 924         }
 925     }
 926 }
 927
 928 static inline void
 929 screen_area_add_strut_left(const StrutPartial *s, const Rect *monitor_area,
 930                            gint edge, Strut *ret)
 931 {
 932     if (s->left &&
 933         ((s->left_end <= s->left_start) ||
 934          (RECT_TOP(*monitor_area) < s->left_end &&
 935           RECT_BOTTOM(*monitor_area) > s->left_start)))
 936         ret->left = MAX(ret->left, edge);
 937 }
 938
 939 static inline void
 940 screen_area_add_strut_top(const StrutPartial *s, const Rect *monitor_area,
 941                           gint edge, Strut *ret)
 942 {
 943     if (s->top &&
 944         ((s->top_end <= s->top_start) ||
 945          (RECT_LEFT(*monitor_area) < s->top_end &&
 946           RECT_RIGHT(*monitor_area) > s->top_start)))
 947         ret->top = MAX(ret->top, edge);
 948 }
 949
 950 static inline void
 951 screen_area_add_strut_right(const StrutPartial *s, const Rect *monitor_area,
 952                             gint edge, Strut *ret)
 953 {
 954     if (s->right &&
 955         ((s->right_end <= s->right_start) ||
 956          (RECT_TOP(*monitor_area) < s->right_end &&
 957           RECT_BOTTOM(*monitor_area) > s->right_start)))
 958         ret->right = MAX(ret->right, edge);
 959 }
 960
 961 static inline void
 962 screen_area_add_strut_bottom(const StrutPartial *s, const Rect *monitor_area,
 963                              gint edge, Strut *ret)
 964 {
 965     if (s->bottom &&
 966         ((s->bottom_end <= s->bottom_start) ||
 967          (RECT_LEFT(*monitor_area) < s->bottom_end &&
 968           RECT_RIGHT(*monitor_area) > s->bottom_start)))
 969         ret->bottom = MAX(ret->bottom, edge);
 970 }
 971
 972 void screen_update_areas()
 973 {
 974     guint i, x;
 975     gulong *dims;
 976     GList *it;
 977     gint o;
 978
 979     g_free(monitor_area);
 980     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
 981
 982     if (area) {
 983         for (i = 0; area[i]; ++i)
 984             g_free(area[i]);
 985         g_free(area);
 986     }
 987
 988     area = g_new(Rect*, screen_num_desktops + 2);
 989     for (i = 0; i < screen_num_desktops + 1; ++i)
 990         area[i] = g_new0(Rect, screen_num_monitors + 1);
 991     area[i] = NULL;
 992
 993     dims = g_new(gulong, 4 * screen_num_desktops);
 994
 995     for (i = 0; i < screen_num_desktops + 1; ++i) {
 996         Strut *struts;
 997         gint l, r, t, b;
 998
 999         struts = g_new0(Strut, screen_num_monitors);
1000
1001         /* calc the xinerama areas */
1002         for (x = 0; x < screen_num_monitors; ++x) {
1003             area[i][x] = monitor_area[x];
1004             if (x == 0) {
1005                 l = monitor_area[x].x;
1006                 t = monitor_area[x].y;
1007                 r = monitor_area[x].x + monitor_area[x].width - 1;
1008                 b = monitor_area[x].y + monitor_area[x].height - 1;
1009             } else {
1010                 l = MIN(l, monitor_area[x].x);
1011                 t = MIN(t, monitor_area[x].y);
1012                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
1013                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
1014             }
1015         }
1016         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
1017
1018         /* apply the struts */
1019
1020         /* find the left-most xin heads, i do this in 2 loops :| */
1021         o = area[i][0].x;
1022         for (x = 1; x < screen_num_monitors; ++x)
1023             o = MIN(o, area[i][x].x);
1024
1025         for (x = 0; x < screen_num_monitors; ++x) {
1026             for (it = client_list; it; it = g_list_next(it)) {
1027                 ObClient *c = it->data;
1028                 screen_area_add_strut_left(&c->strut,
1029                                            &monitor_area[x],
1030                                            o + c->strut.left - area[i][x].x,
1031                                            &struts[x]);
1032             }
1033             screen_area_add_strut_left(&dock_strut,
1034                                        &monitor_area[x],
1035                                        o + dock_strut.left - area[i][x].x,
1036                                        &struts[x]);
1037
1038             area[i][x].x += struts[x].left;
1039             area[i][x].width -= struts[x].left;
1040         }
1041
1042         /* find the top-most xin heads, i do this in 2 loops :| */
1043         o = area[i][0].y;
1044         for (x = 1; x < screen_num_monitors; ++x)
1045             o = MIN(o, area[i][x].y);
1046
1047         for (x = 0; x < screen_num_monitors; ++x) {
1048             for (it = client_list; it; it = g_list_next(it)) {
1049                 ObClient *c = it->data;
1050                 screen_area_add_strut_top(&c->strut,
1051                                            &monitor_area[x],
1052                                            o + c->strut.top - area[i][x].y,
1053                                            &struts[x]);
1054             }
1055             screen_area_add_strut_top(&dock_strut,
1056                                       &monitor_area[x],
1057                                       o + dock_strut.top - area[i][x].y,
1058                                       &struts[x]);
1059
1060             area[i][x].y += struts[x].top;
1061             area[i][x].height -= struts[x].top;
1062         }
1063
1064         /* find the right-most xin heads, i do this in 2 loops :| */
1065         o = area[i][0].x + area[i][0].width - 1;
1066         for (x = 1; x < screen_num_monitors; ++x)
1067             o = MAX(o, area[i][x].x + area[i][x].width - 1);
1068
1069         for (x = 0; x < screen_num_monitors; ++x) {
1070             for (it = client_list; it; it = g_list_next(it)) {
1071                 ObClient *c = it->data;
1072                 screen_area_add_strut_right(&c->strut,
1073                                            &monitor_area[x],
1074                                            (area[i][x].x +
1075                                             area[i][x].width - 1) -
1076                                             (o - c->strut.right),
1077                                             &struts[x]);
1078             }
1079             screen_area_add_strut_right(&dock_strut,
1080                                         &monitor_area[x],
1081                                         (area[i][x].x +
1082                                          area[i][x].width - 1) -
1083                                         (o - dock_strut.right),
1084                                         &struts[x]);
1085
1086             area[i][x].width -= struts[x].right;
1087         }
1088
1089         /* find the bottom-most xin heads, i do this in 2 loops :| */
1090         o = area[i][0].y + area[i][0].height - 1;
1091         for (x = 1; x < screen_num_monitors; ++x)
1092             o = MAX(o, area[i][x].y + area[i][x].height - 1);
1093
1094         for (x = 0; x < screen_num_monitors; ++x) {
1095             for (it = client_list; it; it = g_list_next(it)) {
1096                 ObClient *c = it->data;
1097                 screen_area_add_strut_bottom(&c->strut,
1098                                              &monitor_area[x],
1099                                              (area[i][x].y +
1100                                               area[i][x].height - 1) - \
1101                                              (o - c->strut.bottom),
1102                                              &struts[x]);
1103             }
1104             screen_area_add_strut_bottom(&dock_strut,
1105                                          &monitor_area[x],
1106                                          (area[i][x].y +
1107                                           area[i][x].height - 1) - \
1108                                          (o - dock_strut.bottom),
1109                                          &struts[x]);
1110
1111             area[i][x].height -= struts[x].bottom;
1112         }
1113
1114         l = RECT_LEFT(area[i][0]);
1115         t = RECT_TOP(area[i][0]);
1116         r = RECT_RIGHT(area[i][0]);
1117         b = RECT_BOTTOM(area[i][0]);
1118         for (x = 1; x < screen_num_monitors; ++x) {
1119             l = MIN(l, RECT_LEFT(area[i][x]));
1120             t = MIN(l, RECT_TOP(area[i][x]));
1121             r = MAX(r, RECT_RIGHT(area[i][x]));
1122             b = MAX(b, RECT_BOTTOM(area[i][x]));
1123         }
1124         RECT_SET(area[i][screen_num_monitors], l, t,
1125                  r - l + 1, b - t + 1);
1126
1127         /* XXX optimize when this is run? */
1128
1129         /* the area has changed, adjust all the maximized
1130            windows */
1131         for (it = client_list; it; it = g_list_next(it)) {
1132             ObClient *c = it->data;
1133             if (i < screen_num_desktops) {
1134                 if (c->desktop == i)
1135                     client_reconfigure(c);
1136             } else if (c->desktop == DESKTOP_ALL)
1137                 client_reconfigure(c);
1138         }
1139         if (i < screen_num_desktops) {
1140             /* don't set these for the 'all desktops' area */
1141             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1142             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1143             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1144             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1145         }
1146
1147         g_free(struts);
1148     }
1149
1150     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1151                 dims, 4 * screen_num_desktops);
1152
1153     g_free(dims);
1154 }
1155
1156 Rect *screen_area(guint desktop)
1157 {
1158     return screen_area_monitor(desktop, screen_num_monitors);
1159 }
1160
1161 Rect *screen_area_monitor(guint desktop, guint head)
1162 {
1163     if (head > screen_num_monitors)
1164         return NULL;
1165     if (desktop >= screen_num_desktops) {
1166         if (desktop == DESKTOP_ALL)
1167             return &area[screen_num_desktops][head];
1168         return NULL;
1169     }
1170     return &area[desktop][head];
1171 }
1172
1173 Rect *screen_physical_area()
1174 {
1175     return screen_physical_area_monitor(screen_num_monitors);
1176 }
1177
1178 Rect *screen_physical_area_monitor(guint head)
1179 {
1180     if (head > screen_num_monitors)
1181         return NULL;
1182     return &monitor_area[head];
1183 }
1184
1185 void screen_set_root_cursor()
1186 {
1187     if (sn_app_starting())
1188         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1189                       ob_cursor(OB_CURSOR_BUSY));
1190     else
1191         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1192                       ob_cursor(OB_CURSOR_POINTER));
1193 }
1194
1195 gboolean screen_pointer_pos(gint *x, gint *y)
1196 {
1197     Window w;
1198     gint i;
1199     guint u;
1200
1201     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1202                            &w, &w, x, y, &i, &i, &u);
1203 }