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