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 = 51;
 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_moveresize_window;
 259     supported[i++] = prop_atoms.net_wm_moveresize;
 260     supported[i++] = prop_atoms.ob_wm_state_undecorated;
 261     g_assert(i == num_support);
 262 /*
 263   supported[] = prop_atoms.net_wm_action_stick;
 264 */
 265
 266     PROP_SETA32(RootWindow(ob_display, ob_screen),
 267                 net_supported, atom, supported, num_support);
 268     g_free(supported);
 269
 270     return TRUE;
 271 }
 272
 273 void screen_startup(gboolean reconfig)
 274 {
 275     GSList *it;
 276     guint i;
 277
 278     desktop_cycle_popup = pager_popup_new(FALSE);
 279
 280     if (!reconfig)
 281         /* get the initial size */
 282         screen_resize();
 283
 284     /* set the names */
 285     screen_desktop_names = g_new(gchar*,
 286                                  g_slist_length(config_desktops_names) + 1);
 287     for (i = 0, it = config_desktops_names; it; ++i, it = g_slist_next(it))
 288         screen_desktop_names[i] = it->data; /* dont strdup */
 289     screen_desktop_names[i] = NULL;
 290     PROP_SETSS(RootWindow(ob_display, ob_screen),
 291                net_desktop_names, screen_desktop_names);
 292     g_free(screen_desktop_names); /* dont free the individual strings */
 293     screen_desktop_names = NULL;
 294
 295     if (!reconfig)
 296         screen_num_desktops = 0;
 297     screen_set_num_desktops(config_desktops_num);
 298     if (!reconfig) {
 299         screen_set_desktop(MIN(config_screen_firstdesk, screen_num_desktops) - 1);
 300
 301         /* don't start in showing-desktop mode */
 302         screen_showing_desktop = FALSE;
 303         PROP_SET32(RootWindow(ob_display, ob_screen),
 304                    net_showing_desktop, cardinal, screen_showing_desktop);
 305
 306         screen_update_layout();
 307     }
 308 }
 309
 310 void screen_shutdown(gboolean reconfig)
 311 {
 312     Rect **r;
 313
 314     pager_popup_free(desktop_cycle_popup);
 315
 316     if (!reconfig) {
 317         XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 318                      NoEventMask);
 319
 320         /* we're not running here no more! */
 321         PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 322         /* not without us */
 323         PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 324         /* don't keep this mode */
 325         PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 326
 327         XDestroyWindow(ob_display, screen_support_win);
 328     }
 329
 330     g_strfreev(screen_desktop_names);
 331     screen_desktop_names = NULL;
 332     for (r = area; *r; ++r)
 333         g_free(*r);
 334     g_free(area);
 335     area = NULL;
 336 }
 337
 338 void screen_resize()
 339 {
 340     static gint oldw = 0, oldh = 0;
 341     gint w, h;
 342     GList *it;
 343     gulong geometry[2];
 344
 345     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 346     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 347
 348     if (w == oldw && h == oldh) return;
 349
 350     oldw = w; oldh = h;
 351
 352     /* Set the _NET_DESKTOP_GEOMETRY hint */
 353     screen_physical_size.width = geometry[0] = w;
 354     screen_physical_size.height = geometry[1] = h;
 355     PROP_SETA32(RootWindow(ob_display, ob_screen),
 356                 net_desktop_geometry, cardinal, geometry, 2);
 357
 358     if (ob_state() == OB_STATE_STARTING)
 359         return;
 360
 361     screen_update_areas();
 362     dock_configure();
 363
 364     for (it = client_list; it; it = g_list_next(it))
 365         client_move_onscreen(it->data, FALSE);
 366 }
 367
 368 void screen_set_num_desktops(guint num)
 369 {
 370     guint i, old;
 371     gulong *viewport;
 372     GList *it;
 373
 374     g_assert(num > 0);
 375
 376     if (screen_num_desktops == num) return;
 377
 378     old = screen_num_desktops;
 379     screen_num_desktops = num;
 380     PROP_SET32(RootWindow(ob_display, ob_screen),
 381                net_number_of_desktops, cardinal, num);
 382
 383     /* set the viewport hint */
 384     viewport = g_new0(gulong, num * 2);
 385     PROP_SETA32(RootWindow(ob_display, ob_screen),
 386                 net_desktop_viewport, cardinal, viewport, num * 2);
 387     g_free(viewport);
 388
 389     /* the number of rows/columns will differ */
 390     screen_update_layout();
 391
 392     /* may be some unnamed desktops that we need to fill in with names */
 393     screen_update_desktop_names();
 394
 395     /* move windows on desktops that will no longer exist! */
 396     for (it = client_list; it; it = g_list_next(it)) {
 397         ObClient *c = it->data;
 398         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 399             client_set_desktop(c, num - 1, FALSE);
 400     }
 401
 402     /* change our struts/area to match (after moving windows) */
 403     screen_update_areas();
 404
 405     /* change our desktop if we're on one that no longer exists! */
 406     if (screen_desktop >= screen_num_desktops)
 407         screen_set_desktop(num - 1);
 408
 409    /* update the focus lists */
 410     /* free our lists for the desktops which have disappeared */
 411     for (i = num; i < old; ++i)
 412         g_list_free(focus_order[i]);
 413     /* realloc the array */
 414     focus_order = g_renew(GList*, focus_order, num);
 415     /* set the new lists to be empty */
 416     for (i = old; i < num; ++i)
 417         focus_order[i] = NULL;
 418 }
 419
 420 void screen_set_desktop(guint num)
 421 {
 422     GList *it;
 423     guint old;
 424
 425     g_assert(num < screen_num_desktops);
 426
 427     old = screen_desktop;
 428     screen_desktop = num;
 429     PROP_SET32(RootWindow(ob_display, ob_screen),
 430                net_current_desktop, cardinal, num);
 431
 432     if (old == num) return;
 433
 434     screen_last_desktop = old;
 435
 436     ob_debug("Moving to desktop %d\n", num+1);
 437
 438     if (moveresize_client)
 439         client_set_desktop(moveresize_client, num, TRUE);
 440
 441     /* show windows before hiding the rest to lessen the enter/leave events */
 442
 443     /* show windows from top to bottom */
 444     for (it = stacking_list; it; it = g_list_next(it)) {
 445         if (WINDOW_IS_CLIENT(it->data)) {
 446             ObClient *c = it->data;
 447             if (client_should_show(c))
 448                 frame_show(c->frame);
 449         }
 450     }
 451
 452     /* hide windows from bottom to top */
 453     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 454         if (WINDOW_IS_CLIENT(it->data)) {
 455             ObClient *c = it->data;
 456             if (c->frame->visible && !client_should_show(c))
 457                 frame_hide(c->frame);
 458         }
 459     }
 460
 461     event_ignore_queued_enters();
 462
 463     focus_hilite = focus_fallback_target(OB_FOCUS_FALLBACK_NOFOCUS);
 464     if (focus_hilite) {
 465         frame_adjust_focus(focus_hilite->frame, TRUE);
 466
 467         /*!
 468           When this focus_client check is not used, you can end up with races,
 469           as demonstrated with gnome-panel, sometmies the window you click on
 470           another desktop ends up losing focus cuz of the focus change here.
 471         */
 472         /*if (!focus_client)*/
 473         client_focus(focus_hilite);
 474     }
 475 }
 476
 477 static void get_row_col(guint d, guint *r, guint *c)
 478 {
 479     switch (screen_desktop_layout.orientation) {
 480     case OB_ORIENTATION_HORZ:
 481         switch (screen_desktop_layout.start_corner) {
 482         case OB_CORNER_TOPLEFT:
 483             *r = d / screen_desktop_layout.columns;
 484             *c = d % screen_desktop_layout.columns;
 485             break;
 486         case OB_CORNER_BOTTOMLEFT:
 487             *r = screen_desktop_layout.rows - 1 -
 488                 d / screen_desktop_layout.columns;
 489             *c = d % screen_desktop_layout.columns;
 490             break;
 491         case OB_CORNER_TOPRIGHT:
 492             *r = d / screen_desktop_layout.columns;
 493             *c = screen_desktop_layout.columns - 1 -
 494                 d % screen_desktop_layout.columns;
 495             break;
 496         case OB_CORNER_BOTTOMRIGHT:
 497             *r = screen_desktop_layout.rows - 1 -
 498                 d / screen_desktop_layout.columns;
 499             *c = screen_desktop_layout.columns - 1 -
 500                 d % screen_desktop_layout.columns;
 501             break;
 502         }
 503         break;
 504     case OB_ORIENTATION_VERT:
 505         switch (screen_desktop_layout.start_corner) {
 506         case OB_CORNER_TOPLEFT:
 507             *r = d % screen_desktop_layout.rows;
 508             *c = d / screen_desktop_layout.rows;
 509             break;
 510         case OB_CORNER_BOTTOMLEFT:
 511             *r = screen_desktop_layout.rows - 1 -
 512                 d % screen_desktop_layout.rows;
 513             *c = d / screen_desktop_layout.rows;
 514             break;
 515         case OB_CORNER_TOPRIGHT:
 516             *r = d % screen_desktop_layout.rows;
 517             *c = screen_desktop_layout.columns - 1 -
 518                 d / screen_desktop_layout.rows;
 519             break;
 520         case OB_CORNER_BOTTOMRIGHT:
 521             *r = screen_desktop_layout.rows - 1 -
 522                 d % screen_desktop_layout.rows;
 523             *c = screen_desktop_layout.columns - 1 -
 524                 d / screen_desktop_layout.rows;
 525             break;
 526         }
 527         break;
 528     }
 529 }
 530
 531 static guint translate_row_col(guint r, guint c)
 532 {
 533     switch (screen_desktop_layout.orientation) {
 534     case OB_ORIENTATION_HORZ:
 535         switch (screen_desktop_layout.start_corner) {
 536         case OB_CORNER_TOPLEFT:
 537             return r % screen_desktop_layout.rows *
 538                 screen_desktop_layout.columns +
 539                 c % screen_desktop_layout.columns;
 540         case OB_CORNER_BOTTOMLEFT:
 541             return (screen_desktop_layout.rows - 1 -
 542                     r % screen_desktop_layout.rows) *
 543                 screen_desktop_layout.columns +
 544                 c % screen_desktop_layout.columns;
 545         case OB_CORNER_TOPRIGHT:
 546             return r % screen_desktop_layout.rows *
 547                 screen_desktop_layout.columns +
 548                 (screen_desktop_layout.columns - 1 -
 549                  c % screen_desktop_layout.columns);
 550         case OB_CORNER_BOTTOMRIGHT:
 551             return (screen_desktop_layout.rows - 1 -
 552                     r % screen_desktop_layout.rows) *
 553                 screen_desktop_layout.columns +
 554                 (screen_desktop_layout.columns - 1 -
 555                  c % screen_desktop_layout.columns);
 556         }
 557     case OB_ORIENTATION_VERT:
 558         switch (screen_desktop_layout.start_corner) {
 559         case OB_CORNER_TOPLEFT:
 560             return c % screen_desktop_layout.columns *
 561                 screen_desktop_layout.rows +
 562                 r % screen_desktop_layout.rows;
 563         case OB_CORNER_BOTTOMLEFT:
 564             return c % screen_desktop_layout.columns *
 565                 screen_desktop_layout.rows +
 566                 (screen_desktop_layout.rows - 1 -
 567                  r % screen_desktop_layout.rows);
 568         case OB_CORNER_TOPRIGHT:
 569             return (screen_desktop_layout.columns - 1 -
 570                     c % screen_desktop_layout.columns) *
 571                 screen_desktop_layout.rows +
 572                 r % screen_desktop_layout.rows;
 573         case OB_CORNER_BOTTOMRIGHT:
 574             return (screen_desktop_layout.columns - 1 -
 575                     c % screen_desktop_layout.columns) *
 576                 screen_desktop_layout.rows +
 577                 (screen_desktop_layout.rows - 1 -
 578                  r % screen_desktop_layout.rows);
 579         }
 580     }
 581     g_assert_not_reached();
 582     return 0;
 583 }
 584
 585 void screen_desktop_popup(guint d, gboolean show)
 586 {
 587     Rect *a;
 588
 589     if (!show) {
 590         pager_popup_hide(desktop_cycle_popup);
 591     } else {
 592         a = screen_physical_area_monitor(0);
 593         pager_popup_position(desktop_cycle_popup, CenterGravity,
 594                              a->x + a->width / 2, a->y + a->height / 2);
 595         /* XXX the size and the font extents need to be related on some level
 596          */
 597         pager_popup_size(desktop_cycle_popup, POPUP_WIDTH, POPUP_HEIGHT);
 598
 599         pager_popup_set_text_align(desktop_cycle_popup, RR_JUSTIFY_CENTER);
 600
 601         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
 602     }
 603 }
 604
 605 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 606                            gboolean dialog, gboolean done, gboolean cancel)
 607 {
 608     static gboolean first = TRUE;
 609     static guint origd, d;
 610     guint r, c;
 611
 612     if (cancel) {
 613         d = origd;
 614         goto done_cycle;
 615     } else if (done && dialog) {
 616         goto done_cycle;
 617     }
 618     if (first) {
 619         first = FALSE;
 620         d = origd = screen_desktop;
 621     }
 622
 623     get_row_col(d, &r, &c);
 624
 625     if (linear) {
 626         switch (dir) {
 627         case OB_DIRECTION_EAST:
 628             if (d < screen_num_desktops - 1)
 629                 ++d;
 630             else if (wrap)
 631                 d = 0;
 632             break;
 633         case OB_DIRECTION_WEST:
 634             if (d > 0)
 635                 --d;
 636             else if (wrap)
 637                 d = screen_num_desktops - 1;
 638             break;
 639         default:
 640             assert(0);
 641             return screen_desktop;
 642         }
 643     } else {
 644         switch (dir) {
 645         case OB_DIRECTION_EAST:
 646             ++c;
 647             if (c >= screen_desktop_layout.columns) {
 648                 if (wrap) {
 649                     c = 0;
 650                 } else {
 651                     d = screen_desktop;
 652                     goto show_cycle_dialog;
 653                 }
 654             }
 655             d = translate_row_col(r, c);
 656             if (d >= screen_num_desktops) {
 657                 if (wrap) {
 658                     ++c;
 659                 } else {
 660                     d = screen_desktop;
 661                     goto show_cycle_dialog;
 662                 }
 663             }
 664             break;
 665         case OB_DIRECTION_WEST:
 666             --c;
 667             if (c >= screen_desktop_layout.columns) {
 668                 if (wrap) {
 669                     c = screen_desktop_layout.columns - 1;
 670                 } else {
 671                     d = screen_desktop;
 672                     goto show_cycle_dialog;
 673                 }
 674             }
 675             d = translate_row_col(r, c);
 676             if (d >= screen_num_desktops) {
 677                 if (wrap) {
 678                     --c;
 679                 } else {
 680                     d = screen_desktop;
 681                     goto show_cycle_dialog;
 682                 }
 683             }
 684             break;
 685         case OB_DIRECTION_SOUTH:
 686             ++r;
 687             if (r >= screen_desktop_layout.rows) {
 688                 if (wrap) {
 689                     r = 0;
 690                 } else {
 691                     d = screen_desktop;
 692                     goto show_cycle_dialog;
 693                 }
 694             }
 695             d = translate_row_col(r, c);
 696             if (d >= screen_num_desktops) {
 697                 if (wrap) {
 698                     ++r;
 699                 } else {
 700                     d = screen_desktop;
 701                     goto show_cycle_dialog;
 702                 }
 703             }
 704             break;
 705         case OB_DIRECTION_NORTH:
 706             --r;
 707             if (r >= screen_desktop_layout.rows) {
 708                 if (wrap) {
 709                     r = screen_desktop_layout.rows - 1;
 710                 } else {
 711                     d = screen_desktop;
 712                     goto show_cycle_dialog;
 713                 }
 714             }
 715             d = translate_row_col(r, c);
 716             if (d >= screen_num_desktops) {
 717                 if (wrap) {
 718                     --r;
 719                 } else {
 720                     d = screen_desktop;
 721                     goto show_cycle_dialog;
 722                 }
 723             }
 724             break;
 725         default:
 726             assert(0);
 727             return d = screen_desktop;
 728         }
 729
 730         d = translate_row_col(r, c);
 731     }
 732
 733 show_cycle_dialog:
 734     if (dialog) {
 735         screen_desktop_popup(d, TRUE);
 736         return d;
 737     }
 738
 739 done_cycle:
 740     first = TRUE;
 741
 742     screen_desktop_popup(0, FALSE);
 743
 744     return d;
 745 }
 746
 747 void screen_update_layout()
 748 {
 749     ObOrientation orient;
 750     ObCorner corner;
 751     guint rows;
 752     guint cols;
 753     guint32 *data;
 754     guint num;
 755     gboolean valid = FALSE;
 756
 757     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 758                     net_desktop_layout, cardinal, &data, &num)) {
 759         if (num == 3 || num == 4) {
 760
 761             if (data[0] == prop_atoms.net_wm_orientation_vert)
 762                 orient = OB_ORIENTATION_VERT;
 763             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 764                 orient = OB_ORIENTATION_HORZ;
 765             else
 766                 goto screen_update_layout_bail;
 767
 768             if (num < 4)
 769                 corner = OB_CORNER_TOPLEFT;
 770             else {
 771                 if (data[3] == prop_atoms.net_wm_topleft)
 772                     corner = OB_CORNER_TOPLEFT;
 773                 else if (data[3] == prop_atoms.net_wm_topright)
 774                     corner = OB_CORNER_TOPRIGHT;
 775                 else if (data[3] == prop_atoms.net_wm_bottomright)
 776                     corner = OB_CORNER_BOTTOMRIGHT;
 777                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 778                     corner = OB_CORNER_BOTTOMLEFT;
 779                 else
 780                     goto screen_update_layout_bail;
 781             }
 782
 783             cols = data[1];
 784             rows = data[2];
 785
 786             /* fill in a zero rows/columns */
 787             if ((cols == 0 && rows == 0)) { /* both 0's is bad data.. */
 788                 goto screen_update_layout_bail;
 789             } else {
 790                 if (cols == 0) {
 791                     cols = screen_num_desktops / rows;
 792                     if (rows * cols < screen_num_desktops)
 793                         cols++;
 794                     if (rows * cols >= screen_num_desktops + cols)
 795                         rows--;
 796                 } else if (rows == 0) {
 797                     rows = screen_num_desktops / cols;
 798                     if (cols * rows < screen_num_desktops)
 799                         rows++;
 800                     if (cols * rows >= screen_num_desktops + rows)
 801                         cols--;
 802                 }
 803             }
 804
 805             /* bounds checking */
 806             if (orient == OB_ORIENTATION_HORZ) {
 807                 cols = MIN(screen_num_desktops, cols);
 808                 rows = MIN(rows, (screen_num_desktops + cols - 1) / cols);
 809                 cols = screen_num_desktops / rows +
 810                     !!(screen_num_desktops % rows);
 811             } else {
 812                 rows = MIN(screen_num_desktops, rows);
 813                 cols = MIN(cols, (screen_num_desktops + rows - 1) / rows);
 814                 rows = screen_num_desktops / cols +
 815                     !!(screen_num_desktops % cols);
 816             }
 817
 818             valid = TRUE;
 819         }
 820     screen_update_layout_bail:
 821         g_free(data);
 822     }
 823
 824     if (!valid) {
 825         /* defaults */
 826         orient = OB_ORIENTATION_HORZ;
 827         corner = OB_CORNER_TOPLEFT;
 828         rows = 1;
 829         cols = screen_num_desktops;
 830     }
 831
 832     screen_desktop_layout.orientation = orient;
 833     screen_desktop_layout.start_corner = corner;
 834     screen_desktop_layout.rows = rows;
 835     screen_desktop_layout.columns = cols;
 836 }
 837
 838 void screen_update_desktop_names()
 839 {
 840     guint i;
 841
 842     /* empty the array */
 843     g_strfreev(screen_desktop_names);
 844     screen_desktop_names = NULL;
 845
 846     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 847                    net_desktop_names, utf8, &screen_desktop_names))
 848         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 849     else
 850         i = 0;
 851     if (i <= screen_num_desktops) {
 852         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
 853                                        screen_num_desktops + 1);
 854         screen_desktop_names[screen_num_desktops] = NULL;
 855         for (; i < screen_num_desktops; ++i)
 856             screen_desktop_names[i] = g_strdup_printf("Desktop %i", i + 1);
 857     }
 858 }
 859
 860 void screen_show_desktop(gboolean show)
 861 {
 862     GList *it;
 863
 864     if (show == screen_showing_desktop) return; /* no change */
 865
 866     screen_showing_desktop = show;
 867
 868     if (show) {
 869         /* bottom to top */
 870         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 871             if (WINDOW_IS_CLIENT(it->data)) {
 872                 ObClient *client = it->data;
 873                 if (client->frame->visible && !client_should_show(client))
 874                     frame_hide(client->frame);
 875             }
 876         }
 877     } else {
 878         /* top to bottom */
 879         for (it = stacking_list; it; it = g_list_next(it)) {
 880             if (WINDOW_IS_CLIENT(it->data)) {
 881                 ObClient *client = it->data;
 882                 if (!client->frame->visible && client_should_show(client))
 883                     frame_show(client->frame);
 884             }
 885         }
 886     }
 887
 888     if (show) {
 889         /* focus desktop */
 890         for (it = focus_order[screen_desktop]; it; it = g_list_next(it))
 891             if (((ObClient*)it->data)->type == OB_CLIENT_TYPE_DESKTOP &&
 892                 client_focus(it->data))
 893                 break;
 894     } else {
 895         focus_fallback(OB_FOCUS_FALLBACK_NOFOCUS);
 896     }
 897
 898     show = !!show; /* make it boolean */
 899     PROP_SET32(RootWindow(ob_display, ob_screen),
 900                net_showing_desktop, cardinal, show);
 901 }
 902
 903 void screen_install_colormap(ObClient *client, gboolean install)
 904 {
 905     XWindowAttributes wa;
 906
 907     if (client == NULL) {
 908         if (install)
 909             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 910         else
 911             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 912     } else {
 913         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
 914             wa.colormap != None) {
 915             xerror_set_ignore(TRUE);
 916             if (install)
 917                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 918             else
 919                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 920             xerror_set_ignore(FALSE);
 921         }
 922     }
 923 }
 924
 925 static inline void
 926 screen_area_add_strut_left(const StrutPartial *s, const Rect *monitor_area,
 927                            gint edge, Strut *ret)
 928 {
 929     if (s->left &&
 930         ((s->left_end <= s->left_start) ||
 931          (RECT_TOP(*monitor_area) < s->left_end &&
 932           RECT_BOTTOM(*monitor_area) > s->left_start)))
 933         ret->left = MAX(ret->left, edge);
 934 }
 935
 936 static inline void
 937 screen_area_add_strut_top(const StrutPartial *s, const Rect *monitor_area,
 938                           gint edge, Strut *ret)
 939 {
 940     if (s->top &&
 941         ((s->top_end <= s->top_start) ||
 942          (RECT_LEFT(*monitor_area) < s->top_end &&
 943           RECT_RIGHT(*monitor_area) > s->top_start)))
 944         ret->top = MAX(ret->top, edge);
 945 }
 946
 947 static inline void
 948 screen_area_add_strut_right(const StrutPartial *s, const Rect *monitor_area,
 949                             gint edge, Strut *ret)
 950 {
 951     if (s->right &&
 952         ((s->right_end <= s->right_start) ||
 953          (RECT_TOP(*monitor_area) < s->right_end &&
 954           RECT_BOTTOM(*monitor_area) > s->right_start)))
 955         ret->right = MAX(ret->right, edge);
 956 }
 957
 958 static inline void
 959 screen_area_add_strut_bottom(const StrutPartial *s, const Rect *monitor_area,
 960                              gint edge, Strut *ret)
 961 {
 962     if (s->bottom &&
 963         ((s->bottom_end <= s->bottom_start) ||
 964          (RECT_LEFT(*monitor_area) < s->bottom_end &&
 965           RECT_RIGHT(*monitor_area) > s->bottom_start)))
 966         ret->bottom = MAX(ret->bottom, edge);
 967 }
 968
 969 void screen_update_areas()
 970 {
 971     guint i, x;
 972     gulong *dims;
 973     GList *it;
 974     gint o;
 975
 976     g_free(monitor_area);
 977     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
 978
 979     if (area) {
 980         for (i = 0; area[i]; ++i)
 981             g_free(area[i]);
 982         g_free(area);
 983     }
 984
 985     area = g_new(Rect*, screen_num_desktops + 2);
 986     for (i = 0; i < screen_num_desktops + 1; ++i)
 987         area[i] = g_new0(Rect, screen_num_monitors + 1);
 988     area[i] = NULL;
 989
 990     dims = g_new(gulong, 4 * screen_num_desktops);
 991
 992     for (i = 0; i < screen_num_desktops + 1; ++i) {
 993         Strut *struts;
 994         gint l, r, t, b;
 995
 996         struts = g_new0(Strut, screen_num_monitors);
 997
 998         /* calc the xinerama areas */
 999         for (x = 0; x < screen_num_monitors; ++x) {
1000             area[i][x] = monitor_area[x];
1001             if (x == 0) {
1002                 l = monitor_area[x].x;
1003                 t = monitor_area[x].y;
1004                 r = monitor_area[x].x + monitor_area[x].width - 1;
1005                 b = monitor_area[x].y + monitor_area[x].height - 1;
1006             } else {
1007                 l = MIN(l, monitor_area[x].x);
1008                 t = MIN(t, monitor_area[x].y);
1009                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
1010                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
1011             }
1012         }
1013         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
1014
1015         /* apply the struts */
1016
1017         /* find the left-most xin heads, i do this in 2 loops :| */
1018         o = area[i][0].x;
1019         for (x = 1; x < screen_num_monitors; ++x)
1020             o = MIN(o, area[i][x].x);
1021
1022         for (x = 0; x < screen_num_monitors; ++x) {
1023             for (it = client_list; it; it = g_list_next(it)) {
1024                 ObClient *c = it->data;
1025                 screen_area_add_strut_left(&c->strut,
1026                                            &monitor_area[x],
1027                                            o + c->strut.left - area[i][x].x,
1028                                            &struts[x]);
1029             }
1030             screen_area_add_strut_left(&dock_strut,
1031                                        &monitor_area[x],
1032                                        o + dock_strut.left - area[i][x].x,
1033                                        &struts[x]);
1034
1035             area[i][x].x += struts[x].left;
1036             area[i][x].width -= struts[x].left;
1037         }
1038
1039         /* find the top-most xin heads, i do this in 2 loops :| */
1040         o = area[i][0].y;
1041         for (x = 1; x < screen_num_monitors; ++x)
1042             o = MIN(o, area[i][x].y);
1043
1044         for (x = 0; x < screen_num_monitors; ++x) {
1045             for (it = client_list; it; it = g_list_next(it)) {
1046                 ObClient *c = it->data;
1047                 screen_area_add_strut_top(&c->strut,
1048                                            &monitor_area[x],
1049                                            o + c->strut.top - area[i][x].y,
1050                                            &struts[x]);
1051             }
1052             screen_area_add_strut_top(&dock_strut,
1053                                       &monitor_area[x],
1054                                       o + dock_strut.top - area[i][x].y,
1055                                       &struts[x]);
1056
1057             area[i][x].y += struts[x].top;
1058             area[i][x].height -= struts[x].top;
1059         }
1060
1061         /* find the right-most xin heads, i do this in 2 loops :| */
1062         o = area[i][0].x + area[i][0].width - 1;
1063         for (x = 1; x < screen_num_monitors; ++x)
1064             o = MAX(o, area[i][x].x + area[i][x].width - 1);
1065
1066         for (x = 0; x < screen_num_monitors; ++x) {
1067             for (it = client_list; it; it = g_list_next(it)) {
1068                 ObClient *c = it->data;
1069                 screen_area_add_strut_right(&c->strut,
1070                                            &monitor_area[x],
1071                                            (area[i][x].x +
1072                                             area[i][x].width - 1) -
1073                                             (o - c->strut.right),
1074                                             &struts[x]);
1075             }
1076             screen_area_add_strut_right(&dock_strut,
1077                                         &monitor_area[x],
1078                                         (area[i][x].x +
1079                                          area[i][x].width - 1) -
1080                                         (o - dock_strut.right),
1081                                         &struts[x]);
1082
1083             area[i][x].width -= struts[x].right;
1084         }
1085
1086         /* find the bottom-most xin heads, i do this in 2 loops :| */
1087         o = area[i][0].y + area[i][0].height - 1;
1088         for (x = 1; x < screen_num_monitors; ++x)
1089             o = MAX(o, area[i][x].y + area[i][x].height - 1);
1090
1091         for (x = 0; x < screen_num_monitors; ++x) {
1092             for (it = client_list; it; it = g_list_next(it)) {
1093                 ObClient *c = it->data;
1094                 screen_area_add_strut_bottom(&c->strut,
1095                                              &monitor_area[x],
1096                                              (area[i][x].y +
1097                                               area[i][x].height - 1) - \
1098                                              (o - c->strut.bottom),
1099                                              &struts[x]);
1100             }
1101             screen_area_add_strut_bottom(&dock_strut,
1102                                          &monitor_area[x],
1103                                          (area[i][x].y +
1104                                           area[i][x].height - 1) - \
1105                                          (o - dock_strut.bottom),
1106                                          &struts[x]);
1107
1108             area[i][x].height -= struts[x].bottom;
1109         }
1110
1111         l = RECT_LEFT(area[i][0]);
1112         t = RECT_TOP(area[i][0]);
1113         r = RECT_RIGHT(area[i][0]);
1114         b = RECT_BOTTOM(area[i][0]);
1115         for (x = 1; x < screen_num_monitors; ++x) {
1116             l = MIN(l, RECT_LEFT(area[i][x]));
1117             t = MIN(l, RECT_TOP(area[i][x]));
1118             r = MAX(r, RECT_RIGHT(area[i][x]));
1119             b = MAX(b, RECT_BOTTOM(area[i][x]));
1120         }
1121         RECT_SET(area[i][screen_num_monitors], l, t,
1122                  r - l + 1, b - t + 1);
1123
1124         /* XXX optimize when this is run? */
1125
1126         /* the area has changed, adjust all the maximized
1127            windows */
1128         for (it = client_list; it; it = g_list_next(it)) {
1129             ObClient *c = it->data;
1130             if (i < screen_num_desktops) {
1131                 if (c->desktop == i)
1132                     client_reconfigure(c);
1133             } else if (c->desktop == DESKTOP_ALL)
1134                 client_reconfigure(c);
1135         }
1136         if (i < screen_num_desktops) {
1137             /* don't set these for the 'all desktops' area */
1138             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1139             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1140             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1141             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1142         }
1143
1144         g_free(struts);
1145     }
1146
1147     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1148                 dims, 4 * screen_num_desktops);
1149
1150     g_free(dims);
1151 }
1152
1153 Rect *screen_area(guint desktop)
1154 {
1155     return screen_area_monitor(desktop, screen_num_monitors);
1156 }
1157
1158 Rect *screen_area_monitor(guint desktop, guint head)
1159 {
1160     if (head > screen_num_monitors)
1161         return NULL;
1162     if (desktop >= screen_num_desktops) {
1163         if (desktop == DESKTOP_ALL)
1164             return &area[screen_num_desktops][head];
1165         return NULL;
1166     }
1167     return &area[desktop][head];
1168 }
1169
1170 Rect *screen_physical_area()
1171 {
1172     return screen_physical_area_monitor(screen_num_monitors);
1173 }
1174
1175 Rect *screen_physical_area_monitor(guint head)
1176 {
1177     if (head > screen_num_monitors)
1178         return NULL;
1179     return &monitor_area[head];
1180 }
1181
1182 void screen_set_root_cursor()
1183 {
1184     if (sn_app_starting())
1185         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1186                       ob_cursor(OB_CURSOR_BUSY));
1187     else
1188         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1189                       ob_cursor(OB_CURSOR_POINTER));
1190 }
1191
1192 gboolean screen_pointer_pos(gint *x, gint *y)
1193 {
1194     Window w;
1195     gint i;
1196     guint u;
1197
1198     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1199                            &w, &w, x, y, &i, &i, &u);
1200 }