Dogcows Code - chaz/openbox/blob - openbox/screen.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    screen.c for the Openbox window manager
   4    Copyright (c) 2006        Mikael Magnusson
   5    Copyright (c) 2003        Ben Jansens
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    See the COPYING file for a copy of the GNU General Public License.
  18 */
  19
  20 #include "debug.h"
  21 #include "openbox.h"
  22 #include "dock.h"
  23 #include "xerror.h"
  24 #include "prop.h"
  25 #include "grab.h"
  26 #include "startupnotify.h"
  27 #include "moveresize.h"
  28 #include "config.h"
  29 #include "screen.h"
  30 #include "client.h"
  31 #include "frame.h"
  32 #include "event.h"
  33 #include "focus.h"
  34 #include "popup.h"
  35 #include "extensions.h"
  36 #include "render/render.h"
  37
  38 #include <X11/Xlib.h>
  39 #ifdef HAVE_UNISTD_H
  40 #  include <sys/types.h>
  41 #  include <unistd.h>
  42 #endif
  43 #include <assert.h>
  44
  45 /*! The event mask to grab on the root window */
  46 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
  47                         EnterWindowMask | LeaveWindowMask | \
  48                         SubstructureNotifyMask | SubstructureRedirectMask | \
  49                         ButtonPressMask | ButtonReleaseMask | ButtonMotionMask)
  50
  51 guint    screen_num_desktops;
  52 guint    screen_num_monitors;
  53 guint    screen_desktop;
  54 guint    screen_last_desktop;
  55 Size     screen_physical_size;
  56 gboolean screen_showing_desktop;
  57 DesktopLayout screen_desktop_layout;
  58 gchar  **screen_desktop_names;
  59 Window   screen_support_win;
  60
  61 static Rect  **area; /* array of desktop holding array of xinerama areas */
  62 static Rect  *monitor_area;
  63
  64 static ObPagerPopup *desktop_cycle_popup;
  65
  66 static gboolean replace_wm()
  67 {
  68     gchar *wm_sn;
  69     Atom wm_sn_atom;
  70     Window current_wm_sn_owner;
  71     Time timestamp;
  72
  73     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
  74     wm_sn_atom = XInternAtom(ob_display, wm_sn, FALSE);
  75     g_free(wm_sn);
  76
  77     current_wm_sn_owner = XGetSelectionOwner(ob_display, wm_sn_atom);
  78     if (current_wm_sn_owner == screen_support_win)
  79         current_wm_sn_owner = None;
  80     if (current_wm_sn_owner) {
  81         if (!ob_replace_wm) {
  82             g_warning("A window manager is already running on screen %d",
  83                       ob_screen);
  84             return FALSE;
  85         }
  86         xerror_set_ignore(TRUE);
  87         xerror_occured = FALSE;
  88
  89         /* We want to find out when the current selection owner dies */
  90         XSelectInput(ob_display, current_wm_sn_owner, StructureNotifyMask);
  91         XSync(ob_display, FALSE);
  92
  93         xerror_set_ignore(FALSE);
  94         if (xerror_occured)
  95             current_wm_sn_owner = None;
  96     }
  97
  98     {
  99         /* Generate a timestamp */
 100         XEvent event;
 101
 102         XSelectInput(ob_display, screen_support_win, PropertyChangeMask);
 103
 104         XChangeProperty(ob_display, screen_support_win,
 105                         prop_atoms.wm_class, prop_atoms.string,
 106                         8, PropModeAppend, NULL, 0);
 107         XWindowEvent(ob_display, screen_support_win,
 108                      PropertyChangeMask, &event);
 109
 110         XSelectInput(ob_display, screen_support_win, NoEventMask);
 111
 112         timestamp = event.xproperty.time;
 113     }
 114
 115     XSetSelectionOwner(ob_display, wm_sn_atom, screen_support_win,
 116                        timestamp);
 117
 118     if (XGetSelectionOwner(ob_display, wm_sn_atom) != screen_support_win) {
 119         g_warning("Could not acquire window manager selection on screen %d",
 120                   ob_screen);
 121         return FALSE;
 122     }
 123
 124     /* Wait for old window manager to go away */
 125     if (current_wm_sn_owner) {
 126       XEvent event;
 127       gulong wait = 0;
 128       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
 129
 130       while (wait < timeout) {
 131           if (XCheckWindowEvent(ob_display, current_wm_sn_owner,
 132                                 StructureNotifyMask, &event) &&
 133               event.type == DestroyNotify)
 134               break;
 135           g_usleep(G_USEC_PER_SEC / 10);
 136           wait += G_USEC_PER_SEC / 10;
 137       }
 138
 139       if (wait >= timeout) {
 140           g_warning("Timeout expired while waiting for the current WM to die "
 141                     "on screen %d", ob_screen);
 142           return FALSE;
 143       }
 144     }
 145
 146     /* Send client message indicating that we are now the WM */
 147     prop_message(RootWindow(ob_display, ob_screen), prop_atoms.manager,
 148                  timestamp, wm_sn_atom, 0, 0, SubstructureNotifyMask);
 149
 150
 151     return TRUE;
 152 }
 153
 154 gboolean screen_annex()
 155 {
 156     XSetWindowAttributes attrib;
 157     pid_t pid;
 158     gint i, num_support;
 159     gulong *supported;
 160
 161     /* create the netwm support window */
 162     attrib.override_redirect = TRUE;
 163     screen_support_win = XCreateWindow(ob_display,
 164                                        RootWindow(ob_display, ob_screen),
 165                                        -100, -100, 1, 1, 0,
 166                                        CopyFromParent, InputOutput,
 167                                        CopyFromParent,
 168                                        CWOverrideRedirect, &attrib);
 169     XMapRaised(ob_display, screen_support_win);
 170
 171     if (!replace_wm()) {
 172         XDestroyWindow(ob_display, screen_support_win);
 173         return FALSE;
 174     }
 175
 176     xerror_set_ignore(TRUE);
 177     xerror_occured = FALSE;
 178     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 179                  ROOT_EVENTMASK);
 180     xerror_set_ignore(FALSE);
 181     if (xerror_occured) {
 182         g_warning("A window manager is already running on screen %d",
 183                   ob_screen);
 184
 185         XDestroyWindow(ob_display, screen_support_win);
 186         return FALSE;
 187     }
 188
 189
 190     screen_set_root_cursor();
 191
 192     /* set the OPENBOX_PID hint */
 193     pid = getpid();
 194     PROP_SET32(RootWindow(ob_display, ob_screen),
 195                openbox_pid, cardinal, pid);
 196
 197     /* set supporting window */
 198     PROP_SET32(RootWindow(ob_display, ob_screen),
 199                net_supporting_wm_check, window, screen_support_win);
 200
 201     /* set properties on the supporting window */
 202     PROP_SETS(screen_support_win, net_wm_name, "Openbox");
 203     PROP_SET32(screen_support_win, net_supporting_wm_check,
 204                window, screen_support_win);
 205
 206     /* set the _NET_SUPPORTED_ATOMS hint */
 207     num_support = 55;
 208     i = 0;
 209     supported = g_new(gulong, num_support);
 210     supported[i++] = prop_atoms.net_wm_full_placement;
 211     supported[i++] = prop_atoms.net_current_desktop;
 212     supported[i++] = prop_atoms.net_number_of_desktops;
 213     supported[i++] = prop_atoms.net_desktop_geometry;
 214     supported[i++] = prop_atoms.net_desktop_viewport;
 215     supported[i++] = prop_atoms.net_active_window;
 216     supported[i++] = prop_atoms.net_workarea;
 217     supported[i++] = prop_atoms.net_client_list;
 218     supported[i++] = prop_atoms.net_client_list_stacking;
 219     supported[i++] = prop_atoms.net_desktop_names;
 220     supported[i++] = prop_atoms.net_close_window;
 221     supported[i++] = prop_atoms.net_desktop_layout;
 222     supported[i++] = prop_atoms.net_showing_desktop;
 223     supported[i++] = prop_atoms.net_wm_name;
 224     supported[i++] = prop_atoms.net_wm_visible_name;
 225     supported[i++] = prop_atoms.net_wm_icon_name;
 226     supported[i++] = prop_atoms.net_wm_visible_icon_name;
 227     supported[i++] = prop_atoms.net_wm_desktop;
 228     supported[i++] = prop_atoms.net_wm_strut;
 229     supported[i++] = prop_atoms.net_wm_window_type;
 230     supported[i++] = prop_atoms.net_wm_window_type_desktop;
 231     supported[i++] = prop_atoms.net_wm_window_type_dock;
 232     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
 233     supported[i++] = prop_atoms.net_wm_window_type_menu;
 234     supported[i++] = prop_atoms.net_wm_window_type_utility;
 235     supported[i++] = prop_atoms.net_wm_window_type_splash;
 236     supported[i++] = prop_atoms.net_wm_window_type_dialog;
 237     supported[i++] = prop_atoms.net_wm_window_type_normal;
 238     supported[i++] = prop_atoms.net_wm_allowed_actions;
 239     supported[i++] = prop_atoms.net_wm_action_move;
 240     supported[i++] = prop_atoms.net_wm_action_resize;
 241     supported[i++] = prop_atoms.net_wm_action_minimize;
 242     supported[i++] = prop_atoms.net_wm_action_shade;
 243     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
 244     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
 245     supported[i++] = prop_atoms.net_wm_action_fullscreen;
 246     supported[i++] = prop_atoms.net_wm_action_change_desktop;
 247     supported[i++] = prop_atoms.net_wm_action_close;
 248     supported[i++] = prop_atoms.net_wm_state;
 249     supported[i++] = prop_atoms.net_wm_state_modal;
 250     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
 251     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
 252     supported[i++] = prop_atoms.net_wm_state_shaded;
 253     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
 254     supported[i++] = prop_atoms.net_wm_state_skip_pager;
 255     supported[i++] = prop_atoms.net_wm_state_hidden;
 256     supported[i++] = prop_atoms.net_wm_state_fullscreen;
 257     supported[i++] = prop_atoms.net_wm_state_above;
 258     supported[i++] = prop_atoms.net_wm_state_below;
 259     supported[i++] = prop_atoms.net_wm_state_demands_attention;
 260     supported[i++] = prop_atoms.net_moveresize_window;
 261     supported[i++] = prop_atoms.net_wm_moveresize;
 262     supported[i++] = prop_atoms.net_wm_user_time;
 263     supported[i++] = prop_atoms.net_frame_extents;
 264     supported[i++] = prop_atoms.ob_wm_state_undecorated;
 265     g_assert(i == num_support);
 266 /*
 267   supported[] = prop_atoms.net_wm_action_stick;
 268 */
 269
 270     PROP_SETA32(RootWindow(ob_display, ob_screen),
 271                 net_supported, atom, supported, num_support);
 272     g_free(supported);
 273
 274     return TRUE;
 275 }
 276
 277 void screen_startup(gboolean reconfig)
 278 {
 279     GSList *it;
 280     guint i;
 281
 282     desktop_cycle_popup = pager_popup_new(FALSE);
 283
 284     if (!reconfig)
 285         /* get the initial size */
 286         screen_resize();
 287
 288     /* set the names */
 289     screen_desktop_names = g_new(gchar*,
 290                                  g_slist_length(config_desktops_names) + 1);
 291     for (i = 0, it = config_desktops_names; it; ++i, it = g_slist_next(it))
 292         screen_desktop_names[i] = it->data; /* dont strdup */
 293     screen_desktop_names[i] = NULL;
 294     PROP_SETSS(RootWindow(ob_display, ob_screen),
 295                net_desktop_names, screen_desktop_names);
 296     g_free(screen_desktop_names); /* dont free the individual strings */
 297     screen_desktop_names = NULL;
 298
 299     if (!reconfig)
 300         screen_num_desktops = 0;
 301     screen_set_num_desktops(config_desktops_num);
 302     if (!reconfig) {
 303         screen_set_desktop(MIN(config_screen_firstdesk, screen_num_desktops)
 304                            - 1);
 305
 306         /* don't start in showing-desktop mode */
 307         screen_showing_desktop = FALSE;
 308         PROP_SET32(RootWindow(ob_display, ob_screen),
 309                    net_showing_desktop, cardinal, screen_showing_desktop);
 310
 311         screen_update_layout();
 312     }
 313 }
 314
 315 void screen_shutdown(gboolean reconfig)
 316 {
 317     Rect **r;
 318
 319     pager_popup_free(desktop_cycle_popup);
 320
 321     if (!reconfig) {
 322         XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 323                      NoEventMask);
 324
 325         /* we're not running here no more! */
 326         PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 327         /* not without us */
 328         PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 329         /* don't keep this mode */
 330         PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 331
 332         XDestroyWindow(ob_display, screen_support_win);
 333     }
 334
 335     g_strfreev(screen_desktop_names);
 336     screen_desktop_names = NULL;
 337     for (r = area; *r; ++r)
 338         g_free(*r);
 339     g_free(area);
 340     area = NULL;
 341 }
 342
 343 void screen_resize()
 344 {
 345     static gint oldw = 0, oldh = 0;
 346     gint w, h;
 347     GList *it;
 348     gulong geometry[2];
 349
 350     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 351     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 352
 353     if (w == oldw && h == oldh) return;
 354
 355     oldw = w; oldh = h;
 356
 357     /* Set the _NET_DESKTOP_GEOMETRY hint */
 358     screen_physical_size.width = geometry[0] = w;
 359     screen_physical_size.height = geometry[1] = h;
 360     PROP_SETA32(RootWindow(ob_display, ob_screen),
 361                 net_desktop_geometry, cardinal, geometry, 2);
 362
 363     if (ob_state() == OB_STATE_STARTING)
 364         return;
 365
 366     screen_update_areas();
 367     dock_configure();
 368
 369     for (it = client_list; it; it = g_list_next(it))
 370         client_move_onscreen(it->data, FALSE);
 371 }
 372
 373 void screen_set_num_desktops(guint num)
 374 {
 375     guint i, old;
 376     gulong *viewport;
 377     GList *it;
 378
 379     g_assert(num > 0);
 380
 381     if (screen_num_desktops == num) return;
 382
 383     old = screen_num_desktops;
 384     screen_num_desktops = num;
 385     PROP_SET32(RootWindow(ob_display, ob_screen),
 386                net_number_of_desktops, cardinal, num);
 387
 388     /* set the viewport hint */
 389     viewport = g_new0(gulong, num * 2);
 390     PROP_SETA32(RootWindow(ob_display, ob_screen),
 391                 net_desktop_viewport, cardinal, viewport, num * 2);
 392     g_free(viewport);
 393
 394     /* the number of rows/columns will differ */
 395     screen_update_layout();
 396
 397     /* may be some unnamed desktops that we need to fill in with names */
 398     screen_update_desktop_names();
 399
 400     /* move windows on desktops that will no longer exist! */
 401     for (it = client_list; it; it = g_list_next(it)) {
 402         ObClient *c = it->data;
 403         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 404             client_set_desktop(c, num - 1, FALSE);
 405     }
 406
 407     /* change our struts/area to match (after moving windows) */
 408     screen_update_areas();
 409
 410     /* change our desktop if we're on one that no longer exists! */
 411     if (screen_desktop >= screen_num_desktops)
 412         screen_set_desktop(num - 1);
 413
 414    /* update the focus lists */
 415     /* free our lists for the desktops which have disappeared */
 416     for (i = num; i < old; ++i)
 417         g_list_free(focus_order[i]);
 418     /* realloc the array */
 419     focus_order = g_renew(GList*, focus_order, num);
 420     /* set the new lists to be empty */
 421     for (i = old; i < num; ++i)
 422         focus_order[i] = NULL;
 423 }
 424
 425 void screen_set_desktop(guint num)
 426 {
 427     GList *it;
 428     guint old;
 429
 430     g_assert(num < screen_num_desktops);
 431
 432     old = screen_desktop;
 433     screen_desktop = num;
 434     PROP_SET32(RootWindow(ob_display, ob_screen),
 435                net_current_desktop, cardinal, num);
 436
 437     if (old == num) return;
 438
 439     screen_last_desktop = old;
 440
 441     ob_debug("Moving to desktop %d\n", num+1);
 442
 443     if (moveresize_client)
 444         client_set_desktop(moveresize_client, num, TRUE);
 445
 446     /* show windows before hiding the rest to lessen the enter/leave events */
 447
 448     /* show windows from top to bottom */
 449     for (it = stacking_list; it; it = g_list_next(it)) {
 450         if (WINDOW_IS_CLIENT(it->data)) {
 451             ObClient *c = it->data;
 452             if (client_should_show(c))
 453                 frame_show(c->frame);
 454         }
 455     }
 456
 457     /* hide windows from bottom to top */
 458     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 459         if (WINDOW_IS_CLIENT(it->data)) {
 460             ObClient *c = it->data;
 461             if (c->frame->visible && !client_should_show(c))
 462                 frame_hide(c->frame);
 463         }
 464     }
 465
 466     event_ignore_queued_enters();
 467
 468     focus_hilite = focus_fallback_target(OB_FOCUS_FALLBACK_NOFOCUS);
 469     if (focus_hilite) {
 470         frame_adjust_focus(focus_hilite->frame, TRUE);
 471
 472         /*!
 473           When this focus_client check is not used, you can end up with races,
 474           as demonstrated with gnome-panel, sometmies the window you click on
 475           another desktop ends up losing focus cuz of the focus change here.
 476         */
 477         /*if (!focus_client)*/
 478         client_focus(focus_hilite);
 479     }
 480 }
 481
 482 static void get_row_col(guint d, guint *r, guint *c)
 483 {
 484     switch (screen_desktop_layout.orientation) {
 485     case OB_ORIENTATION_HORZ:
 486         switch (screen_desktop_layout.start_corner) {
 487         case OB_CORNER_TOPLEFT:
 488             *r = d / screen_desktop_layout.columns;
 489             *c = d % screen_desktop_layout.columns;
 490             break;
 491         case OB_CORNER_BOTTOMLEFT:
 492             *r = screen_desktop_layout.rows - 1 -
 493                 d / screen_desktop_layout.columns;
 494             *c = d % screen_desktop_layout.columns;
 495             break;
 496         case OB_CORNER_TOPRIGHT:
 497             *r = d / screen_desktop_layout.columns;
 498             *c = screen_desktop_layout.columns - 1 -
 499                 d % screen_desktop_layout.columns;
 500             break;
 501         case OB_CORNER_BOTTOMRIGHT:
 502             *r = screen_desktop_layout.rows - 1 -
 503                 d / screen_desktop_layout.columns;
 504             *c = screen_desktop_layout.columns - 1 -
 505                 d % screen_desktop_layout.columns;
 506             break;
 507         }
 508         break;
 509     case OB_ORIENTATION_VERT:
 510         switch (screen_desktop_layout.start_corner) {
 511         case OB_CORNER_TOPLEFT:
 512             *r = d % screen_desktop_layout.rows;
 513             *c = d / screen_desktop_layout.rows;
 514             break;
 515         case OB_CORNER_BOTTOMLEFT:
 516             *r = screen_desktop_layout.rows - 1 -
 517                 d % screen_desktop_layout.rows;
 518             *c = d / screen_desktop_layout.rows;
 519             break;
 520         case OB_CORNER_TOPRIGHT:
 521             *r = d % screen_desktop_layout.rows;
 522             *c = screen_desktop_layout.columns - 1 -
 523                 d / screen_desktop_layout.rows;
 524             break;
 525         case OB_CORNER_BOTTOMRIGHT:
 526             *r = screen_desktop_layout.rows - 1 -
 527                 d % screen_desktop_layout.rows;
 528             *c = screen_desktop_layout.columns - 1 -
 529                 d / screen_desktop_layout.rows;
 530             break;
 531         }
 532         break;
 533     }
 534 }
 535
 536 static guint translate_row_col(guint r, guint c)
 537 {
 538     switch (screen_desktop_layout.orientation) {
 539     case OB_ORIENTATION_HORZ:
 540         switch (screen_desktop_layout.start_corner) {
 541         case OB_CORNER_TOPLEFT:
 542             return r % screen_desktop_layout.rows *
 543                 screen_desktop_layout.columns +
 544                 c % screen_desktop_layout.columns;
 545         case OB_CORNER_BOTTOMLEFT:
 546             return (screen_desktop_layout.rows - 1 -
 547                     r % screen_desktop_layout.rows) *
 548                 screen_desktop_layout.columns +
 549                 c % screen_desktop_layout.columns;
 550         case OB_CORNER_TOPRIGHT:
 551             return r % screen_desktop_layout.rows *
 552                 screen_desktop_layout.columns +
 553                 (screen_desktop_layout.columns - 1 -
 554                  c % screen_desktop_layout.columns);
 555         case OB_CORNER_BOTTOMRIGHT:
 556             return (screen_desktop_layout.rows - 1 -
 557                     r % screen_desktop_layout.rows) *
 558                 screen_desktop_layout.columns +
 559                 (screen_desktop_layout.columns - 1 -
 560                  c % screen_desktop_layout.columns);
 561         }
 562     case OB_ORIENTATION_VERT:
 563         switch (screen_desktop_layout.start_corner) {
 564         case OB_CORNER_TOPLEFT:
 565             return c % screen_desktop_layout.columns *
 566                 screen_desktop_layout.rows +
 567                 r % screen_desktop_layout.rows;
 568         case OB_CORNER_BOTTOMLEFT:
 569             return c % screen_desktop_layout.columns *
 570                 screen_desktop_layout.rows +
 571                 (screen_desktop_layout.rows - 1 -
 572                  r % screen_desktop_layout.rows);
 573         case OB_CORNER_TOPRIGHT:
 574             return (screen_desktop_layout.columns - 1 -
 575                     c % screen_desktop_layout.columns) *
 576                 screen_desktop_layout.rows +
 577                 r % screen_desktop_layout.rows;
 578         case OB_CORNER_BOTTOMRIGHT:
 579             return (screen_desktop_layout.columns - 1 -
 580                     c % screen_desktop_layout.columns) *
 581                 screen_desktop_layout.rows +
 582                 (screen_desktop_layout.rows - 1 -
 583                  r % screen_desktop_layout.rows);
 584         }
 585     }
 586     g_assert_not_reached();
 587     return 0;
 588 }
 589
 590 void screen_desktop_popup(guint d, gboolean show)
 591 {
 592     Rect *a;
 593
 594     if (!show) {
 595         pager_popup_hide(desktop_cycle_popup);
 596     } else {
 597         a = screen_physical_area_monitor(0);
 598         pager_popup_position(desktop_cycle_popup, CenterGravity,
 599                              a->x + a->width / 2, a->y + a->height / 2);
 600         /* XXX the size and the font extents need to be related on some level
 601          */
 602         pager_popup_size(desktop_cycle_popup, POPUP_WIDTH, POPUP_HEIGHT);
 603
 604         pager_popup_set_text_align(desktop_cycle_popup, RR_JUSTIFY_CENTER);
 605
 606         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
 607     }
 608 }
 609
 610 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 611                            gboolean dialog, gboolean done, gboolean cancel)
 612 {
 613     static gboolean first = TRUE;
 614     static guint origd, d;
 615     guint r, c;
 616
 617     if (cancel) {
 618         d = origd;
 619         goto done_cycle;
 620     } else if (done && dialog) {
 621         goto done_cycle;
 622     }
 623     if (first) {
 624         first = FALSE;
 625         d = origd = screen_desktop;
 626     }
 627
 628     get_row_col(d, &r, &c);
 629
 630     if (linear) {
 631         switch (dir) {
 632         case OB_DIRECTION_EAST:
 633             if (d < screen_num_desktops - 1)
 634                 ++d;
 635             else if (wrap)
 636                 d = 0;
 637             break;
 638         case OB_DIRECTION_WEST:
 639             if (d > 0)
 640                 --d;
 641             else if (wrap)
 642                 d = screen_num_desktops - 1;
 643             break;
 644         default:
 645             assert(0);
 646             return screen_desktop;
 647         }
 648     } else {
 649         switch (dir) {
 650         case OB_DIRECTION_EAST:
 651             ++c;
 652             if (c >= screen_desktop_layout.columns) {
 653                 if (wrap) {
 654                     c = 0;
 655                 } else {
 656                     d = screen_desktop;
 657                     goto show_cycle_dialog;
 658                 }
 659             }
 660             d = translate_row_col(r, c);
 661             if (d >= screen_num_desktops) {
 662                 if (wrap) {
 663                     ++c;
 664                 } else {
 665                     d = screen_desktop;
 666                     goto show_cycle_dialog;
 667                 }
 668             }
 669             break;
 670         case OB_DIRECTION_WEST:
 671             --c;
 672             if (c >= screen_desktop_layout.columns) {
 673                 if (wrap) {
 674                     c = screen_desktop_layout.columns - 1;
 675                 } else {
 676                     d = screen_desktop;
 677                     goto show_cycle_dialog;
 678                 }
 679             }
 680             d = translate_row_col(r, c);
 681             if (d >= screen_num_desktops) {
 682                 if (wrap) {
 683                     --c;
 684                 } else {
 685                     d = screen_desktop;
 686                     goto show_cycle_dialog;
 687                 }
 688             }
 689             break;
 690         case OB_DIRECTION_SOUTH:
 691             ++r;
 692             if (r >= screen_desktop_layout.rows) {
 693                 if (wrap) {
 694                     r = 0;
 695                 } else {
 696                     d = screen_desktop;
 697                     goto show_cycle_dialog;
 698                 }
 699             }
 700             d = translate_row_col(r, c);
 701             if (d >= screen_num_desktops) {
 702                 if (wrap) {
 703                     ++r;
 704                 } else {
 705                     d = screen_desktop;
 706                     goto show_cycle_dialog;
 707                 }
 708             }
 709             break;
 710         case OB_DIRECTION_NORTH:
 711             --r;
 712             if (r >= screen_desktop_layout.rows) {
 713                 if (wrap) {
 714                     r = screen_desktop_layout.rows - 1;
 715                 } else {
 716                     d = screen_desktop;
 717                     goto show_cycle_dialog;
 718                 }
 719             }
 720             d = translate_row_col(r, c);
 721             if (d >= screen_num_desktops) {
 722                 if (wrap) {
 723                     --r;
 724                 } else {
 725                     d = screen_desktop;
 726                     goto show_cycle_dialog;
 727                 }
 728             }
 729             break;
 730         default:
 731             assert(0);
 732             return d = screen_desktop;
 733         }
 734
 735         d = translate_row_col(r, c);
 736     }
 737
 738 show_cycle_dialog:
 739     if (dialog) {
 740         screen_desktop_popup(d, TRUE);
 741         return d;
 742     }
 743
 744 done_cycle:
 745     first = TRUE;
 746
 747     screen_desktop_popup(0, FALSE);
 748
 749     return d;
 750 }
 751
 752 void screen_update_layout()
 753 {
 754     ObOrientation orient;
 755     ObCorner corner;
 756     guint rows;
 757     guint cols;
 758     guint32 *data;
 759     guint num;
 760     gboolean valid = FALSE;
 761
 762     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 763                     net_desktop_layout, cardinal, &data, &num)) {
 764         if (num == 3 || num == 4) {
 765
 766             if (data[0] == prop_atoms.net_wm_orientation_vert)
 767                 orient = OB_ORIENTATION_VERT;
 768             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 769                 orient = OB_ORIENTATION_HORZ;
 770             else
 771                 goto screen_update_layout_bail;
 772
 773             if (num < 4)
 774                 corner = OB_CORNER_TOPLEFT;
 775             else {
 776                 if (data[3] == prop_atoms.net_wm_topleft)
 777                     corner = OB_CORNER_TOPLEFT;
 778                 else if (data[3] == prop_atoms.net_wm_topright)
 779                     corner = OB_CORNER_TOPRIGHT;
 780                 else if (data[3] == prop_atoms.net_wm_bottomright)
 781                     corner = OB_CORNER_BOTTOMRIGHT;
 782                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 783                     corner = OB_CORNER_BOTTOMLEFT;
 784                 else
 785                     goto screen_update_layout_bail;
 786             }
 787
 788             cols = data[1];
 789             rows = data[2];
 790
 791             /* fill in a zero rows/columns */
 792             if ((cols == 0 && rows == 0)) { /* both 0's is bad data.. */
 793                 goto screen_update_layout_bail;
 794             } else {
 795                 if (cols == 0) {
 796                     cols = screen_num_desktops / rows;
 797                     if (rows * cols < screen_num_desktops)
 798                         cols++;
 799                     if (rows * cols >= screen_num_desktops + cols)
 800                         rows--;
 801                 } else if (rows == 0) {
 802                     rows = screen_num_desktops / cols;
 803                     if (cols * rows < screen_num_desktops)
 804                         rows++;
 805                     if (cols * rows >= screen_num_desktops + rows)
 806                         cols--;
 807                 }
 808             }
 809
 810             /* bounds checking */
 811             if (orient == OB_ORIENTATION_HORZ) {
 812                 cols = MIN(screen_num_desktops, cols);
 813                 rows = MIN(rows, (screen_num_desktops + cols - 1) / cols);
 814                 cols = screen_num_desktops / rows +
 815                     !!(screen_num_desktops % rows);
 816             } else {
 817                 rows = MIN(screen_num_desktops, rows);
 818                 cols = MIN(cols, (screen_num_desktops + rows - 1) / rows);
 819                 rows = screen_num_desktops / cols +
 820                     !!(screen_num_desktops % cols);
 821             }
 822
 823             valid = TRUE;
 824         }
 825     screen_update_layout_bail:
 826         g_free(data);
 827     }
 828
 829     if (!valid) {
 830         /* defaults */
 831         orient = OB_ORIENTATION_HORZ;
 832         corner = OB_CORNER_TOPLEFT;
 833         rows = 1;
 834         cols = screen_num_desktops;
 835     }
 836
 837     screen_desktop_layout.orientation = orient;
 838     screen_desktop_layout.start_corner = corner;
 839     screen_desktop_layout.rows = rows;
 840     screen_desktop_layout.columns = cols;
 841 }
 842
 843 void screen_update_desktop_names()
 844 {
 845     guint i;
 846
 847     /* empty the array */
 848     g_strfreev(screen_desktop_names);
 849     screen_desktop_names = NULL;
 850
 851     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 852                    net_desktop_names, utf8, &screen_desktop_names))
 853         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 854     else
 855         i = 0;
 856     if (i <= screen_num_desktops) {
 857         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
 858                                        screen_num_desktops + 1);
 859         screen_desktop_names[screen_num_desktops] = NULL;
 860         for (; i < screen_num_desktops; ++i)
 861             screen_desktop_names[i] = g_strdup_printf("Desktop %i", i + 1);
 862     }
 863 }
 864
 865 void screen_show_desktop(gboolean show)
 866 {
 867     GList *it;
 868
 869     if (show == screen_showing_desktop) return; /* no change */
 870
 871     screen_showing_desktop = show;
 872
 873     if (show) {
 874         /* bottom to top */
 875         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 876             if (WINDOW_IS_CLIENT(it->data)) {
 877                 ObClient *client = it->data;
 878                 if (client->frame->visible && !client_should_show(client))
 879                     frame_hide(client->frame);
 880             }
 881         }
 882     } else {
 883         /* top to bottom */
 884         for (it = stacking_list; it; it = g_list_next(it)) {
 885             if (WINDOW_IS_CLIENT(it->data)) {
 886                 ObClient *client = it->data;
 887                 if (!client->frame->visible && client_should_show(client))
 888                     frame_show(client->frame);
 889             }
 890         }
 891     }
 892
 893     if (show) {
 894         /* focus desktop */
 895         for (it = focus_order[screen_desktop]; it; it = g_list_next(it))
 896             if (((ObClient*)it->data)->type == OB_CLIENT_TYPE_DESKTOP &&
 897                 client_focus(it->data))
 898                 break;
 899     } else {
 900         focus_fallback(OB_FOCUS_FALLBACK_NOFOCUS);
 901     }
 902
 903     show = !!show; /* make it boolean */
 904     PROP_SET32(RootWindow(ob_display, ob_screen),
 905                net_showing_desktop, cardinal, show);
 906 }
 907
 908 void screen_install_colormap(ObClient *client, gboolean install)
 909 {
 910     XWindowAttributes wa;
 911
 912     if (client == NULL) {
 913         if (install)
 914             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 915         else
 916             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 917     } else {
 918         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
 919             wa.colormap != None) {
 920             xerror_set_ignore(TRUE);
 921             if (install)
 922                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 923             else
 924                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 925             xerror_set_ignore(FALSE);
 926         }
 927     }
 928 }
 929
 930 static inline void
 931 screen_area_add_strut_left(const StrutPartial *s, const Rect *monitor_area,
 932                            gint edge, Strut *ret)
 933 {
 934     if (s->left &&
 935         ((s->left_end <= s->left_start) ||
 936          (RECT_TOP(*monitor_area) < s->left_end &&
 937           RECT_BOTTOM(*monitor_area) > s->left_start)))
 938         ret->left = MAX(ret->left, edge);
 939 }
 940
 941 static inline void
 942 screen_area_add_strut_top(const StrutPartial *s, const Rect *monitor_area,
 943                           gint edge, Strut *ret)
 944 {
 945     if (s->top &&
 946         ((s->top_end <= s->top_start) ||
 947          (RECT_LEFT(*monitor_area) < s->top_end &&
 948           RECT_RIGHT(*monitor_area) > s->top_start)))
 949         ret->top = MAX(ret->top, edge);
 950 }
 951
 952 static inline void
 953 screen_area_add_strut_right(const StrutPartial *s, const Rect *monitor_area,
 954                             gint edge, Strut *ret)
 955 {
 956     if (s->right &&
 957         ((s->right_end <= s->right_start) ||
 958          (RECT_TOP(*monitor_area) < s->right_end &&
 959           RECT_BOTTOM(*monitor_area) > s->right_start)))
 960         ret->right = MAX(ret->right, edge);
 961 }
 962
 963 static inline void
 964 screen_area_add_strut_bottom(const StrutPartial *s, const Rect *monitor_area,
 965                              gint edge, Strut *ret)
 966 {
 967     if (s->bottom &&
 968         ((s->bottom_end <= s->bottom_start) ||
 969          (RECT_LEFT(*monitor_area) < s->bottom_end &&
 970           RECT_RIGHT(*monitor_area) > s->bottom_start)))
 971         ret->bottom = MAX(ret->bottom, edge);
 972 }
 973
 974 void screen_update_areas()
 975 {
 976     guint i, x;
 977     gulong *dims;
 978     GList *it;
 979     gint o;
 980
 981     g_free(monitor_area);
 982     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
 983
 984     if (area) {
 985         for (i = 0; area[i]; ++i)
 986             g_free(area[i]);
 987         g_free(area);
 988     }
 989
 990     area = g_new(Rect*, screen_num_desktops + 2);
 991     for (i = 0; i < screen_num_desktops + 1; ++i)
 992         area[i] = g_new0(Rect, screen_num_monitors + 1);
 993     area[i] = NULL;
 994
 995     dims = g_new(gulong, 4 * screen_num_desktops);
 996
 997     for (i = 0; i < screen_num_desktops + 1; ++i) {
 998         Strut *struts;
 999         gint l, r, t, b;
1000
1001         struts = g_new0(Strut, screen_num_monitors);
1002
1003         /* calc the xinerama areas */
1004         for (x = 0; x < screen_num_monitors; ++x) {
1005             area[i][x] = monitor_area[x];
1006             if (x == 0) {
1007                 l = monitor_area[x].x;
1008                 t = monitor_area[x].y;
1009                 r = monitor_area[x].x + monitor_area[x].width - 1;
1010                 b = monitor_area[x].y + monitor_area[x].height - 1;
1011             } else {
1012                 l = MIN(l, monitor_area[x].x);
1013                 t = MIN(t, monitor_area[x].y);
1014                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
1015                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
1016             }
1017         }
1018         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
1019
1020         /* apply the struts */
1021
1022         /* find the left-most xin heads, i do this in 2 loops :| */
1023         o = area[i][0].x;
1024         for (x = 1; x < screen_num_monitors; ++x)
1025             o = MIN(o, area[i][x].x);
1026
1027         for (x = 0; x < screen_num_monitors; ++x) {
1028             for (it = client_list; it; it = g_list_next(it)) {
1029                 ObClient *c = it->data;
1030                 screen_area_add_strut_left(&c->strut,
1031                                            &monitor_area[x],
1032                                            o + c->strut.left - area[i][x].x,
1033                                            &struts[x]);
1034             }
1035             screen_area_add_strut_left(&dock_strut,
1036                                        &monitor_area[x],
1037                                        o + dock_strut.left - area[i][x].x,
1038                                        &struts[x]);
1039
1040             area[i][x].x += struts[x].left;
1041             area[i][x].width -= struts[x].left;
1042         }
1043
1044         /* find the top-most xin heads, i do this in 2 loops :| */
1045         o = area[i][0].y;
1046         for (x = 1; x < screen_num_monitors; ++x)
1047             o = MIN(o, area[i][x].y);
1048
1049         for (x = 0; x < screen_num_monitors; ++x) {
1050             for (it = client_list; it; it = g_list_next(it)) {
1051                 ObClient *c = it->data;
1052                 screen_area_add_strut_top(&c->strut,
1053                                            &monitor_area[x],
1054                                            o + c->strut.top - area[i][x].y,
1055                                            &struts[x]);
1056             }
1057             screen_area_add_strut_top(&dock_strut,
1058                                       &monitor_area[x],
1059                                       o + dock_strut.top - area[i][x].y,
1060                                       &struts[x]);
1061
1062             area[i][x].y += struts[x].top;
1063             area[i][x].height -= struts[x].top;
1064         }
1065
1066         /* find the right-most xin heads, i do this in 2 loops :| */
1067         o = area[i][0].x + area[i][0].width - 1;
1068         for (x = 1; x < screen_num_monitors; ++x)
1069             o = MAX(o, area[i][x].x + area[i][x].width - 1);
1070
1071         for (x = 0; x < screen_num_monitors; ++x) {
1072             for (it = client_list; it; it = g_list_next(it)) {
1073                 ObClient *c = it->data;
1074                 screen_area_add_strut_right(&c->strut,
1075                                            &monitor_area[x],
1076                                            (area[i][x].x +
1077                                             area[i][x].width - 1) -
1078                                             (o - c->strut.right),
1079                                             &struts[x]);
1080             }
1081             screen_area_add_strut_right(&dock_strut,
1082                                         &monitor_area[x],
1083                                         (area[i][x].x +
1084                                          area[i][x].width - 1) -
1085                                         (o - dock_strut.right),
1086                                         &struts[x]);
1087
1088             area[i][x].width -= struts[x].right;
1089         }
1090
1091         /* find the bottom-most xin heads, i do this in 2 loops :| */
1092         o = area[i][0].y + area[i][0].height - 1;
1093         for (x = 1; x < screen_num_monitors; ++x)
1094             o = MAX(o, area[i][x].y + area[i][x].height - 1);
1095
1096         for (x = 0; x < screen_num_monitors; ++x) {
1097             for (it = client_list; it; it = g_list_next(it)) {
1098                 ObClient *c = it->data;
1099                 screen_area_add_strut_bottom(&c->strut,
1100                                              &monitor_area[x],
1101                                              (area[i][x].y +
1102                                               area[i][x].height - 1) - \
1103                                              (o - c->strut.bottom),
1104                                              &struts[x]);
1105             }
1106             screen_area_add_strut_bottom(&dock_strut,
1107                                          &monitor_area[x],
1108                                          (area[i][x].y +
1109                                           area[i][x].height - 1) - \
1110                                          (o - dock_strut.bottom),
1111                                          &struts[x]);
1112
1113             area[i][x].height -= struts[x].bottom;
1114         }
1115
1116         l = RECT_LEFT(area[i][0]);
1117         t = RECT_TOP(area[i][0]);
1118         r = RECT_RIGHT(area[i][0]);
1119         b = RECT_BOTTOM(area[i][0]);
1120         for (x = 1; x < screen_num_monitors; ++x) {
1121             l = MIN(l, RECT_LEFT(area[i][x]));
1122             t = MIN(l, RECT_TOP(area[i][x]));
1123             r = MAX(r, RECT_RIGHT(area[i][x]));
1124             b = MAX(b, RECT_BOTTOM(area[i][x]));
1125         }
1126         RECT_SET(area[i][screen_num_monitors], l, t,
1127                  r - l + 1, b - t + 1);
1128
1129         /* XXX optimize when this is run? */
1130
1131         /* the area has changed, adjust all the maximized
1132            windows */
1133         for (it = client_list; it; it = g_list_next(it)) {
1134             ObClient *c = it->data;
1135             if (i < screen_num_desktops) {
1136                 if (c->desktop == i)
1137                     client_reconfigure(c);
1138             } else if (c->desktop == DESKTOP_ALL)
1139                 client_reconfigure(c);
1140         }
1141         if (i < screen_num_desktops) {
1142             /* don't set these for the 'all desktops' area */
1143             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1144             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1145             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1146             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1147         }
1148
1149         g_free(struts);
1150     }
1151
1152     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1153                 dims, 4 * screen_num_desktops);
1154
1155     g_free(dims);
1156 }
1157
1158 Rect *screen_area(guint desktop)
1159 {
1160     return screen_area_monitor(desktop, screen_num_monitors);
1161 }
1162
1163 Rect *screen_area_monitor(guint desktop, guint head)
1164 {
1165     if (head > screen_num_monitors)
1166         return NULL;
1167     if (desktop >= screen_num_desktops) {
1168         if (desktop == DESKTOP_ALL)
1169             return &area[screen_num_desktops][head];
1170         return NULL;
1171     }
1172     return &area[desktop][head];
1173 }
1174
1175 Rect *screen_physical_area()
1176 {
1177     return screen_physical_area_monitor(screen_num_monitors);
1178 }
1179
1180 Rect *screen_physical_area_monitor(guint head)
1181 {
1182     if (head > screen_num_monitors)
1183         return NULL;
1184     return &monitor_area[head];
1185 }
1186
1187 void screen_set_root_cursor()
1188 {
1189     if (sn_app_starting())
1190         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1191                       ob_cursor(OB_CURSOR_BUSY));
1192     else
1193         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1194                       ob_cursor(OB_CURSOR_POINTER));
1195 }
1196
1197 gboolean screen_pointer_pos(gint *x, gint *y)
1198 {
1199     Window w;
1200     gint i;
1201     guint u;
1202
1203     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1204                            &w, &w, x, y, &i, &i, &u);
1205 }