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) 2003        Ben Jansens
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    See the COPYING file for a copy of the GNU General Public License.
  17 */
  18
  19 #include "debug.h"
  20 #include "openbox.h"
  21 #include "dock.h"
  22 #include "xerror.h"
  23 #include "prop.h"
  24 #include "grab.h"
  25 #include "startupnotify.h"
  26 #include "moveresize.h"
  27 #include "config.h"
  28 #include "screen.h"
  29 #include "client.h"
  30 #include "frame.h"
  31 #include "event.h"
  32 #include "focus.h"
  33 #include "popup.h"
  34 #include "extensions.h"
  35 #include "render/render.h"
  36
  37 #include <X11/Xlib.h>
  38 #ifdef HAVE_UNISTD_H
  39 #  include <sys/types.h>
  40 #  include <unistd.h>
  41 #endif
  42 #include <assert.h>
  43
  44 /*! The event mask to grab on the root window */
  45 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
  46                         EnterWindowMask | LeaveWindowMask | \
  47                         SubstructureNotifyMask | SubstructureRedirectMask | \
  48                         ButtonPressMask | ButtonReleaseMask | ButtonMotionMask)
  49
  50 guint    screen_num_desktops;
  51 guint    screen_num_monitors;
  52 guint    screen_desktop;
  53 guint    screen_last_desktop;
  54 Size     screen_physical_size;
  55 gboolean screen_showing_desktop;
  56 DesktopLayout screen_desktop_layout;
  57 char   **screen_desktop_names;
  58 Window   screen_support_win;
  59
  60 static Rect  **area; /* array of desktop holding array of xinerama areas */
  61 static Rect  *monitor_area;
  62
  63 static ObPagerPopup *desktop_cycle_popup;
  64
  65 static gboolean replace_wm()
  66 {
  67     char *wm_sn;
  68     Atom wm_sn_atom;
  69     Window current_wm_sn_owner;
  70     Time timestamp;
  71
  72     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
  73     wm_sn_atom = XInternAtom(ob_display, wm_sn, FALSE);
  74     g_free(wm_sn);
  75
  76     current_wm_sn_owner = XGetSelectionOwner(ob_display, wm_sn_atom);
  77     if (current_wm_sn_owner) {
  78         if (!ob_replace_wm) {
  79             g_warning("A window manager is already running on screen %d",
  80                       ob_screen);
  81             return FALSE;
  82         }
  83         xerror_set_ignore(TRUE);
  84         xerror_occured = FALSE;
  85
  86         /* We want to find out when the current selection owner dies */
  87         XSelectInput(ob_display, current_wm_sn_owner, StructureNotifyMask);
  88         XSync(ob_display, FALSE);
  89
  90         xerror_set_ignore(FALSE);
  91         if (xerror_occured)
  92             current_wm_sn_owner = None;
  93     }
  94
  95     {
  96         /* Generate a timestamp */
  97         XEvent event;
  98
  99         XSelectInput(ob_display, screen_support_win, PropertyChangeMask);
 100
 101         XChangeProperty(ob_display, screen_support_win,
 102                         prop_atoms.wm_class, prop_atoms.string,
 103                         8, PropModeAppend, NULL, 0);
 104         XWindowEvent(ob_display, screen_support_win,
 105                      PropertyChangeMask, &event);
 106
 107         XSelectInput(ob_display, screen_support_win, NoEventMask);
 108
 109         timestamp = event.xproperty.time;
 110     }
 111
 112     XSetSelectionOwner(ob_display, wm_sn_atom, screen_support_win,
 113                        timestamp);
 114
 115     if (XGetSelectionOwner(ob_display, wm_sn_atom) != screen_support_win) {
 116         g_warning("Could not acquire window manager selection on screen %d",
 117                   ob_screen);
 118         return FALSE;
 119     }
 120
 121     /* Wait for old window manager to go away */
 122     if (current_wm_sn_owner) {
 123       XEvent event;
 124       gulong wait = 0;
 125       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
 126
 127       while (wait < timeout) {
 128           if (XCheckWindowEvent(ob_display, current_wm_sn_owner,
 129                                 StructureNotifyMask, &event) &&
 130               event.type == DestroyNotify)
 131               break;
 132           g_usleep(G_USEC_PER_SEC / 10);
 133           wait += G_USEC_PER_SEC / 10;
 134       }
 135
 136       if (wait >= timeout) {
 137           g_warning("Timeout expired while waiting for the current WM to die "
 138                     "on screen %d", ob_screen);
 139           return FALSE;
 140       }
 141     }
 142
 143     /* Send client message indicating that we are now the WM */
 144     prop_message(RootWindow(ob_display, ob_screen), prop_atoms.manager,
 145                  timestamp, wm_sn_atom, 0, 0, SubstructureNotifyMask);
 146
 147
 148     return TRUE;
 149 }
 150
 151 gboolean screen_annex()
 152 {
 153     XSetWindowAttributes attrib;
 154     pid_t pid;
 155     gint i, num_support;
 156     guint32 *supported;
 157
 158     /* create the netwm support window */
 159     attrib.override_redirect = TRUE;
 160     screen_support_win = XCreateWindow(ob_display,
 161                                        RootWindow(ob_display, ob_screen),
 162                                        -100, -100, 1, 1, 0,
 163                                        CopyFromParent, InputOutput,
 164                                        CopyFromParent,
 165                                        CWOverrideRedirect, &attrib);
 166     XMapRaised(ob_display, screen_support_win);
 167
 168     if (!replace_wm()) {
 169         XDestroyWindow(ob_display, screen_support_win);
 170         return FALSE;
 171     }
 172
 173     xerror_set_ignore(TRUE);
 174     xerror_occured = FALSE;
 175     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 176                  ROOT_EVENTMASK);
 177     xerror_set_ignore(FALSE);
 178     if (xerror_occured) {
 179         g_warning("A window manager is already running on screen %d",
 180                   ob_screen);
 181
 182         XDestroyWindow(ob_display, screen_support_win);
 183         return FALSE;
 184     }
 185
 186
 187     screen_set_root_cursor();
 188
 189     /* set the OPENBOX_PID hint */
 190     pid = getpid();
 191     PROP_SET32(RootWindow(ob_display, ob_screen),
 192                openbox_pid, cardinal, pid);
 193
 194     /* set supporting window */
 195     PROP_SET32(RootWindow(ob_display, ob_screen),
 196                net_supporting_wm_check, window, screen_support_win);
 197
 198     /* set properties on the supporting window */
 199     PROP_SETS(screen_support_win, net_wm_name, "Openbox");
 200     PROP_SET32(screen_support_win, net_supporting_wm_check,
 201                window, screen_support_win);
 202
 203     /* set the _NET_SUPPORTED_ATOMS hint */
 204     num_support = 50;
 205     i = 0;
 206     supported = g_new(guint32, num_support);
 207     supported[i++] = prop_atoms.net_current_desktop;
 208     supported[i++] = prop_atoms.net_number_of_desktops;
 209     supported[i++] = prop_atoms.net_desktop_geometry;
 210     supported[i++] = prop_atoms.net_desktop_viewport;
 211     supported[i++] = prop_atoms.net_active_window;
 212     supported[i++] = prop_atoms.net_workarea;
 213     supported[i++] = prop_atoms.net_client_list;
 214     supported[i++] = prop_atoms.net_client_list_stacking;
 215     supported[i++] = prop_atoms.net_desktop_names;
 216     supported[i++] = prop_atoms.net_close_window;
 217     supported[i++] = prop_atoms.net_desktop_layout;
 218     supported[i++] = prop_atoms.net_showing_desktop;
 219     supported[i++] = prop_atoms.net_wm_name;
 220     supported[i++] = prop_atoms.net_wm_visible_name;
 221     supported[i++] = prop_atoms.net_wm_icon_name;
 222     supported[i++] = prop_atoms.net_wm_visible_icon_name;
 223     supported[i++] = prop_atoms.net_wm_desktop;
 224     supported[i++] = prop_atoms.net_wm_strut;
 225     supported[i++] = prop_atoms.net_wm_window_type;
 226     supported[i++] = prop_atoms.net_wm_window_type_desktop;
 227     supported[i++] = prop_atoms.net_wm_window_type_dock;
 228     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
 229     supported[i++] = prop_atoms.net_wm_window_type_menu;
 230     supported[i++] = prop_atoms.net_wm_window_type_utility;
 231     supported[i++] = prop_atoms.net_wm_window_type_splash;
 232     supported[i++] = prop_atoms.net_wm_window_type_dialog;
 233     supported[i++] = prop_atoms.net_wm_window_type_normal;
 234     supported[i++] = prop_atoms.net_wm_allowed_actions;
 235     supported[i++] = prop_atoms.net_wm_action_move;
 236     supported[i++] = prop_atoms.net_wm_action_resize;
 237     supported[i++] = prop_atoms.net_wm_action_minimize;
 238     supported[i++] = prop_atoms.net_wm_action_shade;
 239     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
 240     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
 241     supported[i++] = prop_atoms.net_wm_action_fullscreen;
 242     supported[i++] = prop_atoms.net_wm_action_change_desktop;
 243     supported[i++] = prop_atoms.net_wm_action_close;
 244     supported[i++] = prop_atoms.net_wm_state;
 245     supported[i++] = prop_atoms.net_wm_state_modal;
 246     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
 247     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
 248     supported[i++] = prop_atoms.net_wm_state_shaded;
 249     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
 250     supported[i++] = prop_atoms.net_wm_state_skip_pager;
 251     supported[i++] = prop_atoms.net_wm_state_hidden;
 252     supported[i++] = prop_atoms.net_wm_state_fullscreen;
 253     supported[i++] = prop_atoms.net_wm_state_above;
 254     supported[i++] = prop_atoms.net_wm_state_below;
 255     supported[i++] = prop_atoms.net_moveresize_window;
 256     supported[i++] = prop_atoms.net_wm_moveresize;
 257     g_assert(i == num_support);
 258 /*
 259   supported[] = prop_atoms.net_wm_action_stick;
 260 */
 261
 262     PROP_SETA32(RootWindow(ob_display, ob_screen),
 263                 net_supported, atom, supported, num_support);
 264     g_free(supported);
 265
 266     return TRUE;
 267 }
 268
 269 void screen_startup(gboolean reconfig)
 270 {
 271     GSList *it;
 272     guint i;
 273
 274     desktop_cycle_popup = pager_popup_new(FALSE);
 275
 276     if (!reconfig)
 277         /* get the initial size */
 278         screen_resize();
 279
 280     /* set the names */
 281     screen_desktop_names = g_new(char*,
 282                                  g_slist_length(config_desktops_names) + 1);
 283     for (i = 0, it = config_desktops_names; it; ++i, it = it->next)
 284         screen_desktop_names[i] = it->data; /* dont strdup */
 285     screen_desktop_names[i] = NULL;
 286     PROP_SETSS(RootWindow(ob_display, ob_screen),
 287                net_desktop_names, screen_desktop_names);
 288     g_free(screen_desktop_names); /* dont free the individual strings */
 289     screen_desktop_names = NULL;
 290
 291     if (!reconfig)
 292         screen_num_desktops = 0;
 293     screen_set_num_desktops(config_desktops_num);
 294     if (!reconfig) {
 295         screen_set_desktop(0);
 296
 297         /* don't start in showing-desktop mode */
 298         screen_showing_desktop = FALSE;
 299         PROP_SET32(RootWindow(ob_display, ob_screen),
 300                    net_showing_desktop, cardinal, screen_showing_desktop);
 301
 302         screen_update_layout();
 303     }
 304 }
 305
 306 void screen_shutdown(gboolean reconfig)
 307 {
 308     Rect **r;
 309
 310     pager_popup_free(desktop_cycle_popup);
 311
 312     if (!reconfig) {
 313         XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 314                      NoEventMask);
 315
 316         /* we're not running here no more! */
 317         PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 318         /* not without us */
 319         PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 320         /* don't keep this mode */
 321         PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 322
 323         XDestroyWindow(ob_display, screen_support_win);
 324     }
 325
 326     g_strfreev(screen_desktop_names);
 327     screen_desktop_names = NULL;
 328     for (r = area; *r; ++r)
 329         g_free(*r);
 330     g_free(area);
 331     area = NULL;
 332 }
 333
 334 void screen_resize()
 335 {
 336     static int oldw = 0, oldh = 0;
 337     int w, h;
 338     GList *it;
 339     guint32 geometry[2];
 340
 341     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 342     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 343
 344     if (w == oldw && h == oldh) return;
 345
 346     oldw = w; oldh = h;
 347
 348     /* Set the _NET_DESKTOP_GEOMETRY hint */
 349     screen_physical_size.width = geometry[0] = w;
 350     screen_physical_size.height = geometry[1] = h;
 351     PROP_SETA32(RootWindow(ob_display, ob_screen),
 352                 net_desktop_geometry, cardinal, geometry, 2);
 353
 354     if (ob_state() == OB_STATE_STARTING)
 355         return;
 356
 357     screen_update_areas();
 358     dock_configure();
 359
 360     for (it = client_list; it; it = it->next)
 361         client_move_onscreen(it->data, FALSE);
 362 }
 363
 364 void screen_set_num_desktops(guint num)
 365 {
 366     guint i, old;
 367     guint32 *viewport;
 368     GList *it;
 369
 370     g_assert(num > 0);
 371
 372     if (screen_num_desktops == num) return;
 373
 374     old = screen_num_desktops;
 375     screen_num_desktops = num;
 376     PROP_SET32(RootWindow(ob_display, ob_screen),
 377                net_number_of_desktops, cardinal, num);
 378
 379     /* set the viewport hint */
 380     viewport = g_new0(guint32, num * 2);
 381     PROP_SETA32(RootWindow(ob_display, ob_screen),
 382                 net_desktop_viewport, cardinal, viewport, num * 2);
 383     g_free(viewport);
 384
 385     /* the number of rows/columns will differ */
 386     screen_update_layout();
 387
 388     /* may be some unnamed desktops that we need to fill in with names */
 389     screen_update_desktop_names();
 390
 391     /* move windows on desktops that will no longer exist! */
 392     for (it = client_list; it != NULL; it = it->next) {
 393         ObClient *c = it->data;
 394         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 395             client_set_desktop(c, num - 1, FALSE);
 396     }
 397
 398     /* change our struts/area to match (after moving windows) */
 399     screen_update_areas();
 400
 401     /* change our desktop if we're on one that no longer exists! */
 402     if (screen_desktop >= screen_num_desktops)
 403         screen_set_desktop(num - 1);
 404
 405    /* update the focus lists */
 406     /* free our lists for the desktops which have disappeared */
 407     for (i = num; i < old; ++i)
 408         g_list_free(focus_order[i]);
 409     /* realloc the array */
 410     focus_order = g_renew(GList*, focus_order, num);
 411     /* set the new lists to be empty */
 412     for (i = old; i < num; ++i)
 413         focus_order[i] = NULL;
 414 }
 415
 416 void screen_set_desktop(guint num)
 417 {
 418     GList *it;
 419     guint old;
 420
 421     g_assert(num < screen_num_desktops);
 422
 423     old = screen_desktop;
 424     screen_desktop = num;
 425     PROP_SET32(RootWindow(ob_display, ob_screen),
 426                net_current_desktop, cardinal, num);
 427
 428     if (old == num) return;
 429
 430     screen_last_desktop = old;
 431
 432     ob_debug("Moving to desktop %d\n", num+1);
 433
 434     if (moveresize_client)
 435         client_set_desktop(moveresize_client, num, TRUE);
 436
 437     /* show windows before hiding the rest to lessen the enter/leave events */
 438
 439     /* show windows from top to bottom */
 440     for (it = stacking_list; it != NULL; it = it->next) {
 441         if (WINDOW_IS_CLIENT(it->data)) {
 442             ObClient *c = it->data;
 443             if (!c->frame->visible && client_should_show(c))
 444                 frame_show(c->frame);
 445         }
 446     }
 447
 448     /* hide windows from bottom to top */
 449     for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 450         if (WINDOW_IS_CLIENT(it->data)) {
 451             ObClient *c = it->data;
 452             if (c->frame->visible && !client_should_show(c))
 453                 frame_hide(c->frame);
 454         }
 455     }
 456
 457     event_ignore_queued_enters();
 458
 459     focus_fallback(OB_FOCUS_FALLBACK_NOFOCUS);
 460 }
 461
 462 static void get_row_col(guint d, guint *r, guint *c)
 463 {
 464     switch (screen_desktop_layout.orientation) {
 465     case OB_ORIENTATION_HORZ:
 466         switch (screen_desktop_layout.start_corner) {
 467         case OB_CORNER_TOPLEFT:
 468             *r = d / screen_desktop_layout.columns;
 469             *c = d % screen_desktop_layout.columns;
 470             break;
 471         case OB_CORNER_BOTTOMLEFT:
 472             *r = screen_desktop_layout.rows - 1 -
 473                 d / screen_desktop_layout.columns;
 474             *c = d % screen_desktop_layout.columns;
 475             break;
 476         case OB_CORNER_TOPRIGHT:
 477             *r = d / screen_desktop_layout.columns;
 478             *c = screen_desktop_layout.columns - 1 -
 479                 d % screen_desktop_layout.columns;
 480             break;
 481         case OB_CORNER_BOTTOMRIGHT:
 482             *r = screen_desktop_layout.rows - 1 -
 483                 d / screen_desktop_layout.columns;
 484             *c = screen_desktop_layout.columns - 1 -
 485                 d % screen_desktop_layout.columns;
 486             break;
 487         }
 488         break;
 489     case OB_ORIENTATION_VERT:
 490         switch (screen_desktop_layout.start_corner) {
 491         case OB_CORNER_TOPLEFT:
 492             *r = d % screen_desktop_layout.rows;
 493             *c = d / screen_desktop_layout.rows;
 494             break;
 495         case OB_CORNER_BOTTOMLEFT:
 496             *r = screen_desktop_layout.rows - 1 -
 497                 d % screen_desktop_layout.rows;
 498             *c = d / screen_desktop_layout.rows;
 499             break;
 500         case OB_CORNER_TOPRIGHT:
 501             *r = d % screen_desktop_layout.rows;
 502             *c = screen_desktop_layout.columns - 1 -
 503                 d / screen_desktop_layout.rows;
 504             break;
 505         case OB_CORNER_BOTTOMRIGHT:
 506             *r = screen_desktop_layout.rows - 1 -
 507                 d % screen_desktop_layout.rows;
 508             *c = screen_desktop_layout.columns - 1 -
 509                 d / screen_desktop_layout.rows;
 510             break;
 511         }
 512         break;
 513     }
 514 }
 515
 516 static guint translate_row_col(guint r, guint c)
 517 {
 518     switch (screen_desktop_layout.orientation) {
 519     case OB_ORIENTATION_HORZ:
 520         switch (screen_desktop_layout.start_corner) {
 521         case OB_CORNER_TOPLEFT:
 522             return r % screen_desktop_layout.rows *
 523                 screen_desktop_layout.columns +
 524                 c % screen_desktop_layout.columns;
 525         case OB_CORNER_BOTTOMLEFT:
 526             return (screen_desktop_layout.rows - 1 -
 527                     r % screen_desktop_layout.rows) *
 528                 screen_desktop_layout.columns +
 529                 c % screen_desktop_layout.columns;
 530         case OB_CORNER_TOPRIGHT:
 531             return r % screen_desktop_layout.rows *
 532                 screen_desktop_layout.columns +
 533                 (screen_desktop_layout.columns - 1 -
 534                  c % screen_desktop_layout.columns);
 535         case OB_CORNER_BOTTOMRIGHT:
 536             return (screen_desktop_layout.rows - 1 -
 537                     r % screen_desktop_layout.rows) *
 538                 screen_desktop_layout.columns +
 539                 (screen_desktop_layout.columns - 1 -
 540                  c % screen_desktop_layout.columns);
 541         }
 542     case OB_ORIENTATION_VERT:
 543         switch (screen_desktop_layout.start_corner) {
 544         case OB_CORNER_TOPLEFT:
 545             return c % screen_desktop_layout.columns *
 546                 screen_desktop_layout.rows +
 547                 r % screen_desktop_layout.rows;
 548         case OB_CORNER_BOTTOMLEFT:
 549             return c % screen_desktop_layout.columns *
 550                 screen_desktop_layout.rows +
 551                 (screen_desktop_layout.rows - 1 -
 552                  r % screen_desktop_layout.rows);
 553         case OB_CORNER_TOPRIGHT:
 554             return (screen_desktop_layout.columns - 1 -
 555                     c % screen_desktop_layout.columns) *
 556                 screen_desktop_layout.rows +
 557                 r % screen_desktop_layout.rows;
 558         case OB_CORNER_BOTTOMRIGHT:
 559             return (screen_desktop_layout.columns - 1 -
 560                     c % screen_desktop_layout.columns) *
 561                 screen_desktop_layout.rows +
 562                 (screen_desktop_layout.rows - 1 -
 563                  r % screen_desktop_layout.rows);
 564         }
 565     }
 566     g_assert_not_reached();
 567     return 0;
 568 }
 569
 570 static void popup_cycle(guint d, gboolean show)
 571 {
 572     Rect *a;
 573
 574     if (!show) {
 575         pager_popup_hide(desktop_cycle_popup);
 576     } else {
 577         a = screen_physical_area_monitor(0);
 578         pager_popup_position(desktop_cycle_popup, CenterGravity,
 579                              a->x + a->width / 2, a->y + a->height / 2);
 580         /* XXX the size and the font extents need to be related on some level
 581          */
 582         pager_popup_size(desktop_cycle_popup, POPUP_WIDTH, POPUP_HEIGHT);
 583
 584         pager_popup_set_text_align(desktop_cycle_popup, RR_JUSTIFY_CENTER);
 585
 586         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
 587     }
 588 }
 589
 590 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 591                            gboolean dialog, gboolean done, gboolean cancel)
 592 {
 593     static gboolean first = TRUE;
 594     static gboolean lin;
 595     static guint origd, d;
 596     guint r, c;
 597
 598     if (cancel) {
 599         d = origd;
 600         goto done_cycle;
 601     } else if (done && dialog) {
 602         goto done_cycle;
 603     }
 604     if (first) {
 605         first = FALSE;
 606         lin = linear;
 607         d = origd = screen_desktop;
 608     }
 609
 610     get_row_col(d, &r, &c);
 611
 612     if (lin) {
 613         switch (dir) {
 614         case OB_DIRECTION_EAST:
 615             if (d < screen_num_desktops - 1)
 616                 ++d;
 617             else if (wrap)
 618                 d = 0;
 619             break;
 620         case OB_DIRECTION_WEST:
 621             if (d > 0)
 622                 --d;
 623             else if (wrap)
 624                 d = screen_num_desktops - 1;
 625             break;
 626         default:
 627             assert(0);
 628             return screen_desktop;
 629         }
 630     } else {
 631         switch (dir) {
 632         case OB_DIRECTION_EAST:
 633             ++c;
 634             if (c >= screen_desktop_layout.columns) {
 635                 if (!wrap) return d = screen_desktop;
 636                 c = 0;
 637             }
 638             d = translate_row_col(r, c);
 639             if (d >= screen_num_desktops) {
 640                 if (!wrap) return d = screen_desktop;
 641                 ++c;
 642             }
 643             break;
 644         case OB_DIRECTION_WEST:
 645             --c;
 646             if (c >= screen_desktop_layout.columns) {
 647                 if (!wrap) return d = screen_desktop;
 648                 c = screen_desktop_layout.columns - 1;
 649             }
 650             d = translate_row_col(r, c);
 651             if (d >= screen_num_desktops) {
 652                 if (!wrap) return d = screen_desktop;
 653                 --c;
 654             }
 655             break;
 656         case OB_DIRECTION_SOUTH:
 657             ++r;
 658             if (r >= screen_desktop_layout.rows) {
 659                 if (!wrap) return d = screen_desktop;
 660                 r = 0;
 661             }
 662             d = translate_row_col(r, c);
 663             if (d >= screen_num_desktops) {
 664                 if (!wrap) return d = screen_desktop;
 665                 ++r;
 666             }
 667             break;
 668         case OB_DIRECTION_NORTH:
 669             --r;
 670             if (r >= screen_desktop_layout.rows) {
 671                 if (!wrap) return d = screen_desktop;
 672                 r = screen_desktop_layout.rows - 1;
 673             }
 674             d = translate_row_col(r, c);
 675             if (d >= screen_num_desktops) {
 676                 if (!wrap) return d = screen_desktop;
 677                 --r;
 678             }
 679             break;
 680         default:
 681             assert(0);
 682             return d = screen_desktop;
 683         }
 684
 685         d = translate_row_col(r, c);
 686     }
 687
 688     if (dialog) {
 689         popup_cycle(d, TRUE);
 690         return d;
 691     }
 692
 693 done_cycle:
 694     first = TRUE;
 695
 696     popup_cycle(0, FALSE);
 697
 698     return d;
 699 }
 700
 701 void screen_update_layout()
 702 {
 703     ObOrientation orient;
 704     ObCorner corner;
 705     guint rows;
 706     guint cols;
 707     guint32 *data;
 708     guint num;
 709     gboolean valid = FALSE;
 710
 711     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 712                     net_desktop_layout, cardinal, &data, &num)) {
 713         if (num == 3 || num == 4) {
 714
 715             if (data[0] == prop_atoms.net_wm_orientation_vert)
 716                 orient = OB_ORIENTATION_VERT;
 717             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 718                 orient = OB_ORIENTATION_HORZ;
 719             else
 720                 goto screen_update_layout_bail;
 721
 722             if (num < 4)
 723                 corner = OB_CORNER_TOPLEFT;
 724             else {
 725                 if (data[3] == prop_atoms.net_wm_topleft)
 726                     corner = OB_CORNER_TOPLEFT;
 727                 else if (data[3] == prop_atoms.net_wm_topright)
 728                     corner = OB_CORNER_TOPRIGHT;
 729                 else if (data[3] == prop_atoms.net_wm_bottomright)
 730                     corner = OB_CORNER_BOTTOMRIGHT;
 731                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 732                     corner = OB_CORNER_BOTTOMLEFT;
 733                 else
 734                     goto screen_update_layout_bail;
 735             }
 736
 737             cols = data[1];
 738             rows = data[2];
 739
 740             /* fill in a zero rows/columns */
 741             if ((cols == 0 && rows == 0)) { /* both 0's is bad data.. */
 742                 goto screen_update_layout_bail;
 743             } else {
 744                 if (cols == 0) {
 745                     cols = screen_num_desktops / rows;
 746                     if (rows * cols < screen_num_desktops)
 747                         cols++;
 748                     if (rows * cols >= screen_num_desktops + cols)
 749                         rows--;
 750                 } else if (rows == 0) {
 751                     rows = screen_num_desktops / cols;
 752                     if (cols * rows < screen_num_desktops)
 753                         rows++;
 754                     if (cols * rows >= screen_num_desktops + rows)
 755                         cols--;
 756                 }
 757             }
 758
 759             /* bounds checking */
 760             if (orient == OB_ORIENTATION_HORZ) {
 761                 cols = MIN(screen_num_desktops, cols);
 762                 rows = MIN(rows, (screen_num_desktops + cols - 1) / cols);
 763                 cols = screen_num_desktops / rows +
 764                     !!(screen_num_desktops % rows);
 765             } else {
 766                 rows = MIN(screen_num_desktops, rows);
 767                 cols = MIN(cols, (screen_num_desktops + rows - 1) / rows);
 768                 rows = screen_num_desktops / cols +
 769                     !!(screen_num_desktops % cols);
 770             }
 771
 772             valid = TRUE;
 773         }
 774     screen_update_layout_bail:
 775         g_free(data);
 776     }
 777
 778     if (!valid) {
 779         /* defaults */
 780         orient = OB_ORIENTATION_HORZ;
 781         corner = OB_CORNER_TOPLEFT;
 782         rows = 1;
 783         cols = screen_num_desktops;
 784     }
 785
 786     screen_desktop_layout.orientation = orient;
 787     screen_desktop_layout.start_corner = corner;
 788     screen_desktop_layout.rows = rows;
 789     screen_desktop_layout.columns = cols;
 790 }
 791
 792 void screen_update_desktop_names()
 793 {
 794     guint i;
 795
 796     /* empty the array */
 797     g_strfreev(screen_desktop_names);
 798     screen_desktop_names = NULL;
 799
 800     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 801                    net_desktop_names, utf8, &screen_desktop_names))
 802         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 803     else
 804         i = 0;
 805     if (i <= screen_num_desktops) {
 806         screen_desktop_names = g_renew(char*, screen_desktop_names,
 807                                        screen_num_desktops + 1);
 808         screen_desktop_names[screen_num_desktops] = NULL;
 809         for (; i < screen_num_desktops; ++i)
 810             screen_desktop_names[i] = g_strdup("Unnamed Desktop");
 811     }
 812 }
 813
 814 void screen_show_desktop(gboolean show)
 815 {
 816     GList *it;
 817
 818     if (show == screen_showing_desktop) return; /* no change */
 819
 820     screen_showing_desktop = show;
 821
 822     if (show) {
 823         /* bottom to top */
 824         for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 825             if (WINDOW_IS_CLIENT(it->data)) {
 826                 ObClient *client = it->data;
 827                 if (client->frame->visible && !client_should_show(client))
 828                     frame_hide(client->frame);
 829             }
 830         }
 831     } else {
 832         /* top to bottom */
 833         for (it = stacking_list; it != NULL; it = it->next) {
 834             if (WINDOW_IS_CLIENT(it->data)) {
 835                 ObClient *client = it->data;
 836                 if (!client->frame->visible && client_should_show(client))
 837                     frame_show(client->frame);
 838             }
 839         }
 840     }
 841
 842     if (show) {
 843         /* focus desktop */
 844         for (it = focus_order[screen_desktop]; it; it = it->next)
 845             if (((ObClient*)it->data)->type == OB_CLIENT_TYPE_DESKTOP &&
 846                 client_focus(it->data))
 847                 break;
 848     } else {
 849         focus_fallback(OB_FOCUS_FALLBACK_NOFOCUS);
 850     }
 851
 852     show = !!show; /* make it boolean */
 853     PROP_SET32(RootWindow(ob_display, ob_screen),
 854                net_showing_desktop, cardinal, show);
 855 }
 856
 857 void screen_install_colormap(ObClient *client, gboolean install)
 858 {
 859     XWindowAttributes wa;
 860
 861     if (client == NULL) {
 862         if (install)
 863             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 864         else
 865             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 866     } else {
 867         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
 868             wa.colormap != None) {
 869             xerror_set_ignore(TRUE);
 870             if (install)
 871                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 872             else
 873                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 874             xerror_set_ignore(FALSE);
 875         }
 876     }
 877 }
 878
 879 static inline void
 880 screen_area_add_strut_left(const StrutPartial *s, const Rect *monitor_area,
 881                            gint edge, Strut *ret)
 882 {
 883     if (s->left &&
 884         ((s->left_end <= s->left_start) ||
 885          (RECT_TOP(*monitor_area) < s->left_end &&
 886           RECT_BOTTOM(*monitor_area) > s->left_start)))
 887         ret->left = MAX(ret->left, edge);
 888 }
 889
 890 static inline void
 891 screen_area_add_strut_top(const StrutPartial *s, const Rect *monitor_area,
 892                           gint edge, Strut *ret)
 893 {
 894     if (s->top &&
 895         ((s->top_end <= s->top_start) ||
 896          (RECT_LEFT(*monitor_area) < s->top_end &&
 897           RECT_RIGHT(*monitor_area) > s->top_start)))
 898         ret->top = MAX(ret->top, edge);
 899 }
 900
 901 static inline void
 902 screen_area_add_strut_right(const StrutPartial *s, const Rect *monitor_area,
 903                             gint edge, Strut *ret)
 904 {
 905     if (s->right &&
 906         ((s->right_end <= s->right_start) ||
 907          (RECT_TOP(*monitor_area) < s->right_end &&
 908           RECT_BOTTOM(*monitor_area) > s->right_start)))
 909         ret->right = MAX(ret->right, edge);
 910 }
 911
 912 static inline void
 913 screen_area_add_strut_bottom(const StrutPartial *s, const Rect *monitor_area,
 914                              gint edge, Strut *ret)
 915 {
 916     if (s->bottom &&
 917         ((s->bottom_end <= s->bottom_start) ||
 918          (RECT_LEFT(*monitor_area) < s->bottom_end &&
 919           RECT_RIGHT(*monitor_area) > s->bottom_start)))
 920         ret->bottom = MAX(ret->bottom, edge);
 921 }
 922
 923 void screen_update_areas()
 924 {
 925     guint i, x;
 926     guint32 *dims;
 927     GList *it;
 928     gint o;
 929
 930     g_free(monitor_area);
 931     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
 932
 933     if (area) {
 934         for (i = 0; area[i]; ++i)
 935             g_free(area[i]);
 936         g_free(area);
 937     }
 938
 939     area = g_new(Rect*, screen_num_desktops + 2);
 940     for (i = 0; i < screen_num_desktops + 1; ++i)
 941         area[i] = g_new0(Rect, screen_num_monitors + 1);
 942     area[i] = NULL;
 943
 944     dims = g_new(guint32, 4 * screen_num_desktops);
 945
 946     for (i = 0; i < screen_num_desktops + 1; ++i) {
 947         Strut *struts;
 948         gint l, r, t, b;
 949
 950         struts = g_new0(Strut, screen_num_monitors);
 951
 952         /* calc the xinerama areas */
 953         for (x = 0; x < screen_num_monitors; ++x) {
 954             area[i][x] = monitor_area[x];
 955             if (x == 0) {
 956                 l = monitor_area[x].x;
 957                 t = monitor_area[x].y;
 958                 r = monitor_area[x].x + monitor_area[x].width - 1;
 959                 b = monitor_area[x].y + monitor_area[x].height - 1;
 960             } else {
 961                 l = MIN(l, monitor_area[x].x);
 962                 t = MIN(t, monitor_area[x].y);
 963                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
 964                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
 965             }
 966         }
 967         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
 968
 969         /* apply the struts */
 970
 971         /* find the left-most xin heads, i do this in 2 loops :| */
 972         o = area[i][0].x;
 973         for (x = 1; x < screen_num_monitors; ++x)
 974             o = MIN(o, area[i][x].x);
 975
 976         for (x = 0; x < screen_num_monitors; ++x) {
 977             for (it = client_list; it; it = it->next) {
 978                 ObClient *c = it->data;
 979                 screen_area_add_strut_left(&c->strut,
 980                                            &monitor_area[x],
 981                                            o + c->strut.left - area[i][x].x,
 982                                            &struts[x]);
 983             }
 984             screen_area_add_strut_left(&dock_strut,
 985                                        &monitor_area[x],
 986                                        o + dock_strut.left - area[i][x].x,
 987                                        &struts[x]);
 988
 989             area[i][x].x += struts[x].left;
 990             area[i][x].width -= struts[x].left;
 991         }
 992
 993         /* find the top-most xin heads, i do this in 2 loops :| */
 994         o = area[i][0].y;
 995         for (x = 1; x < screen_num_monitors; ++x)
 996             o = MIN(o, area[i][x].y);
 997
 998         for (x = 0; x < screen_num_monitors; ++x) {
 999             for (it = client_list; it; it = it->next) {
1000                 ObClient *c = it->data;
1001                 screen_area_add_strut_top(&c->strut,
1002                                            &monitor_area[x],
1003                                            o + c->strut.top - area[i][x].y,
1004                                            &struts[x]);
1005             }
1006             screen_area_add_strut_top(&dock_strut,
1007                                       &monitor_area[x],
1008                                       o + dock_strut.top - area[i][x].y,
1009                                       &struts[x]);
1010
1011             area[i][x].y += struts[x].top;
1012             area[i][x].height -= struts[x].top;
1013         }
1014
1015         /* find the right-most xin heads, i do this in 2 loops :| */
1016         o = area[i][0].x + area[i][0].width - 1;
1017         for (x = 1; x < screen_num_monitors; ++x)
1018             o = MAX(o, area[i][x].x + area[i][x].width - 1);
1019
1020         for (x = 0; x < screen_num_monitors; ++x) {
1021             for (it = client_list; it; it = it->next) {
1022                 ObClient *c = it->data;
1023                 screen_area_add_strut_right(&c->strut,
1024                                            &monitor_area[x],
1025                                            (area[i][x].x +
1026                                             area[i][x].width - 1) -
1027                                             (o - c->strut.right),
1028                                             &struts[x]);
1029             }
1030             screen_area_add_strut_right(&dock_strut,
1031                                         &monitor_area[x],
1032                                         (area[i][x].x +
1033                                          area[i][x].width - 1) -
1034                                         (o - dock_strut.right),
1035                                         &struts[x]);
1036
1037             area[i][x].width -= struts[x].right;
1038         }
1039
1040         /* find the bottom-most xin heads, i do this in 2 loops :| */
1041         o = area[i][0].y + area[i][0].height - 1;
1042         for (x = 1; x < screen_num_monitors; ++x)
1043             o = MAX(o, area[i][x].y + area[i][x].height - 1);
1044
1045         for (x = 0; x < screen_num_monitors; ++x) {
1046             for (it = client_list; it; it = it->next) {
1047                 ObClient *c = it->data;
1048                 screen_area_add_strut_bottom(&c->strut,
1049                                              &monitor_area[x],
1050                                              (area[i][x].y +
1051                                               area[i][x].height - 1) - \
1052                                              (o - c->strut.bottom),
1053                                              &struts[x]);
1054             }
1055             screen_area_add_strut_bottom(&dock_strut,
1056                                          &monitor_area[x],
1057                                          (area[i][x].y +
1058                                           area[i][x].height - 1) - \
1059                                          (o - dock_strut.bottom),
1060                                          &struts[x]);
1061
1062             area[i][x].height -= struts[x].bottom;
1063         }
1064
1065         l = RECT_LEFT(area[i][0]);
1066         t = RECT_TOP(area[i][0]);
1067         r = RECT_RIGHT(area[i][0]);
1068         b = RECT_BOTTOM(area[i][0]);
1069         for (x = 1; x < screen_num_monitors; ++x) {
1070             l = MIN(l, RECT_LEFT(area[i][x]));
1071             t = MIN(l, RECT_TOP(area[i][x]));
1072             r = MAX(r, RECT_RIGHT(area[i][x]));
1073             b = MAX(b, RECT_BOTTOM(area[i][x]));
1074         }
1075         RECT_SET(area[i][screen_num_monitors], l, t,
1076                  r - l + 1, b - t + 1);
1077
1078         /* XXX optimize when this is run? */
1079
1080         /* the area has changed, adjust all the maximized
1081            windows */
1082         for (it = client_list; it; it = it->next) {
1083             ObClient *c = it->data;
1084             if (i < screen_num_desktops) {
1085                 if (c->desktop == i)
1086                     client_reconfigure(c);
1087             } else if (c->desktop == DESKTOP_ALL)
1088                 client_reconfigure(c);
1089         }
1090         if (i < screen_num_desktops) {
1091             /* don't set these for the 'all desktops' area */
1092             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1093             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1094             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1095             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1096         }
1097
1098         g_free(struts);
1099     }
1100
1101     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1102                 dims, 4 * screen_num_desktops);
1103
1104     g_free(dims);
1105 }
1106
1107 Rect *screen_area(guint desktop)
1108 {
1109     return screen_area_monitor(desktop, screen_num_monitors);
1110 }
1111
1112 Rect *screen_area_monitor(guint desktop, guint head)
1113 {
1114     if (head > screen_num_monitors)
1115         return NULL;
1116     if (desktop >= screen_num_desktops) {
1117         if (desktop == DESKTOP_ALL)
1118             return &area[screen_num_desktops][head];
1119         return NULL;
1120     }
1121     return &area[desktop][head];
1122 }
1123
1124 Rect *screen_physical_area()
1125 {
1126     return screen_physical_area_monitor(screen_num_monitors);
1127 }
1128
1129 Rect *screen_physical_area_monitor(guint head)
1130 {
1131     if (head > screen_num_monitors)
1132         return NULL;
1133     return &monitor_area[head];
1134 }
1135
1136 void screen_set_root_cursor()
1137 {
1138     if (sn_app_starting())
1139         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1140                       ob_cursor(OB_CURSOR_BUSY));
1141     else
1142         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1143                       ob_cursor(OB_CURSOR_POINTER));
1144 }
1145
1146 gboolean screen_pointer_pos(int *x, int *y)
1147 {
1148     Window w;
1149     int i;
1150     guint u;
1151
1152     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1153                            &w, &w, x, y, &i, &i, &u);
1154 }