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