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) 2003-2007   Dana 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                         SubstructureRedirectMask | FocusChangeMask | \
  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     XMapWindow(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         guint32 d;
 304         /* start on the current desktop when a wm was already running */
 305         if (PROP_GET32(RootWindow(ob_display, ob_screen),
 306                        net_current_desktop, cardinal, &d) &&
 307             d < screen_num_desktops)
 308         {
 309             screen_set_desktop(d);
 310         } else
 311             screen_set_desktop(MIN(config_screen_firstdesk,
 312                                    screen_num_desktops) - 1);
 313
 314         /* don't start in showing-desktop mode */
 315         screen_showing_desktop = FALSE;
 316         PROP_SET32(RootWindow(ob_display, ob_screen),
 317                    net_showing_desktop, cardinal, screen_showing_desktop);
 318
 319         screen_update_layout();
 320     }
 321 }
 322
 323 void screen_shutdown(gboolean reconfig)
 324 {
 325     Rect **r;
 326
 327     pager_popup_free(desktop_cycle_popup);
 328
 329     if (!reconfig) {
 330         XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 331                      NoEventMask);
 332
 333         /* we're not running here no more! */
 334         PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 335         /* not without us */
 336         PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 337         /* don't keep this mode */
 338         PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 339
 340         XDestroyWindow(ob_display, screen_support_win);
 341     }
 342
 343     g_strfreev(screen_desktop_names);
 344     screen_desktop_names = NULL;
 345     for (r = area; *r; ++r)
 346         g_free(*r);
 347     g_free(area);
 348     area = NULL;
 349 }
 350
 351 void screen_resize()
 352 {
 353     static gint oldw = 0, oldh = 0;
 354     gint w, h;
 355     GList *it;
 356     gulong geometry[2];
 357
 358     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 359     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 360
 361     if (w == oldw && h == oldh) return;
 362
 363     oldw = w; oldh = h;
 364
 365     /* Set the _NET_DESKTOP_GEOMETRY hint */
 366     screen_physical_size.width = geometry[0] = w;
 367     screen_physical_size.height = geometry[1] = h;
 368     PROP_SETA32(RootWindow(ob_display, ob_screen),
 369                 net_desktop_geometry, cardinal, geometry, 2);
 370
 371     if (ob_state() == OB_STATE_STARTING)
 372         return;
 373
 374     screen_update_areas();
 375     dock_configure();
 376
 377     for (it = client_list; it; it = g_list_next(it))
 378         client_move_onscreen(it->data, FALSE);
 379 }
 380
 381 void screen_set_num_desktops(guint num)
 382 {
 383     guint old;
 384     gulong *viewport;
 385     GList *it;
 386
 387     g_assert(num > 0);
 388
 389     if (screen_num_desktops == num) return;
 390
 391     old = screen_num_desktops;
 392     screen_num_desktops = num;
 393     PROP_SET32(RootWindow(ob_display, ob_screen),
 394                net_number_of_desktops, cardinal, num);
 395
 396     /* set the viewport hint */
 397     viewport = g_new0(gulong, num * 2);
 398     PROP_SETA32(RootWindow(ob_display, ob_screen),
 399                 net_desktop_viewport, cardinal, viewport, num * 2);
 400     g_free(viewport);
 401
 402     /* the number of rows/columns will differ */
 403     screen_update_layout();
 404
 405     /* may be some unnamed desktops that we need to fill in with names */
 406     screen_update_desktop_names();
 407
 408     /* move windows on desktops that will no longer exist! */
 409     for (it = client_list; it; it = g_list_next(it)) {
 410         ObClient *c = it->data;
 411         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 412             client_set_desktop(c, num - 1, FALSE);
 413     }
 414
 415     /* change our struts/area to match (after moving windows) */
 416     screen_update_areas();
 417
 418     /* change our desktop if we're on one that no longer exists! */
 419     if (screen_desktop >= screen_num_desktops)
 420         screen_set_desktop(num - 1);
 421 }
 422
 423 void screen_set_desktop(guint num)
 424 {
 425     ObClient *c;
 426     GList *it;
 427     guint old;
 428
 429     g_assert(num < screen_num_desktops);
 430
 431     old = screen_desktop;
 432     screen_desktop = num;
 433     PROP_SET32(RootWindow(ob_display, ob_screen),
 434                net_current_desktop, cardinal, num);
 435
 436     if (old == num) return;
 437
 438     screen_last_desktop = old;
 439
 440     ob_debug("Moving to desktop %d\n", num+1);
 441
 442     if (moveresize_client)
 443         client_set_desktop(moveresize_client, num, TRUE);
 444
 445     /* show windows before hiding the rest to lessen the enter/leave events */
 446
 447     /* show/hide windows from top to bottom */
 448     for (it = stacking_list; it; it = g_list_next(it)) {
 449         if (WINDOW_IS_CLIENT(it->data)) {
 450             ObClient *c = it->data;
 451             client_show(c);
 452         }
 453     }
 454
 455     /* hide windows from bottom to top */
 456     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 457         if (WINDOW_IS_CLIENT(it->data)) {
 458             ObClient *c = it->data;
 459             client_hide(c);
 460         }
 461     }
 462
 463     /* reduce flicker by hiliting now rather than waiting for the server
 464        FocusIn event */
 465     if ((c = focus_fallback_target(TRUE, focus_client)))
 466         frame_adjust_focus(c->frame, TRUE);
 467
 468     event_ignore_queued_enters();
 469 }
 470
 471 static void get_row_col(guint d, guint *r, guint *c)
 472 {
 473     switch (screen_desktop_layout.orientation) {
 474     case OB_ORIENTATION_HORZ:
 475         switch (screen_desktop_layout.start_corner) {
 476         case OB_CORNER_TOPLEFT:
 477             *r = d / screen_desktop_layout.columns;
 478             *c = d % screen_desktop_layout.columns;
 479             break;
 480         case OB_CORNER_BOTTOMLEFT:
 481             *r = screen_desktop_layout.rows - 1 -
 482                 d / screen_desktop_layout.columns;
 483             *c = d % screen_desktop_layout.columns;
 484             break;
 485         case OB_CORNER_TOPRIGHT:
 486             *r = d / screen_desktop_layout.columns;
 487             *c = screen_desktop_layout.columns - 1 -
 488                 d % screen_desktop_layout.columns;
 489             break;
 490         case OB_CORNER_BOTTOMRIGHT:
 491             *r = screen_desktop_layout.rows - 1 -
 492                 d / screen_desktop_layout.columns;
 493             *c = screen_desktop_layout.columns - 1 -
 494                 d % screen_desktop_layout.columns;
 495             break;
 496         }
 497         break;
 498     case OB_ORIENTATION_VERT:
 499         switch (screen_desktop_layout.start_corner) {
 500         case OB_CORNER_TOPLEFT:
 501             *r = d % screen_desktop_layout.rows;
 502             *c = d / screen_desktop_layout.rows;
 503             break;
 504         case OB_CORNER_BOTTOMLEFT:
 505             *r = screen_desktop_layout.rows - 1 -
 506                 d % screen_desktop_layout.rows;
 507             *c = d / screen_desktop_layout.rows;
 508             break;
 509         case OB_CORNER_TOPRIGHT:
 510             *r = d % screen_desktop_layout.rows;
 511             *c = screen_desktop_layout.columns - 1 -
 512                 d / screen_desktop_layout.rows;
 513             break;
 514         case OB_CORNER_BOTTOMRIGHT:
 515             *r = screen_desktop_layout.rows - 1 -
 516                 d % screen_desktop_layout.rows;
 517             *c = screen_desktop_layout.columns - 1 -
 518                 d / screen_desktop_layout.rows;
 519             break;
 520         }
 521         break;
 522     }
 523 }
 524
 525 static guint translate_row_col(guint r, guint c)
 526 {
 527     switch (screen_desktop_layout.orientation) {
 528     case OB_ORIENTATION_HORZ:
 529         switch (screen_desktop_layout.start_corner) {
 530         case OB_CORNER_TOPLEFT:
 531             return r % screen_desktop_layout.rows *
 532                 screen_desktop_layout.columns +
 533                 c % screen_desktop_layout.columns;
 534         case OB_CORNER_BOTTOMLEFT:
 535             return (screen_desktop_layout.rows - 1 -
 536                     r % screen_desktop_layout.rows) *
 537                 screen_desktop_layout.columns +
 538                 c % screen_desktop_layout.columns;
 539         case OB_CORNER_TOPRIGHT:
 540             return r % screen_desktop_layout.rows *
 541                 screen_desktop_layout.columns +
 542                 (screen_desktop_layout.columns - 1 -
 543                  c % screen_desktop_layout.columns);
 544         case OB_CORNER_BOTTOMRIGHT:
 545             return (screen_desktop_layout.rows - 1 -
 546                     r % screen_desktop_layout.rows) *
 547                 screen_desktop_layout.columns +
 548                 (screen_desktop_layout.columns - 1 -
 549                  c % screen_desktop_layout.columns);
 550         }
 551     case OB_ORIENTATION_VERT:
 552         switch (screen_desktop_layout.start_corner) {
 553         case OB_CORNER_TOPLEFT:
 554             return c % screen_desktop_layout.columns *
 555                 screen_desktop_layout.rows +
 556                 r % screen_desktop_layout.rows;
 557         case OB_CORNER_BOTTOMLEFT:
 558             return c % screen_desktop_layout.columns *
 559                 screen_desktop_layout.rows +
 560                 (screen_desktop_layout.rows - 1 -
 561                  r % screen_desktop_layout.rows);
 562         case OB_CORNER_TOPRIGHT:
 563             return (screen_desktop_layout.columns - 1 -
 564                     c % screen_desktop_layout.columns) *
 565                 screen_desktop_layout.rows +
 566                 r % screen_desktop_layout.rows;
 567         case OB_CORNER_BOTTOMRIGHT:
 568             return (screen_desktop_layout.columns - 1 -
 569                     c % screen_desktop_layout.columns) *
 570                 screen_desktop_layout.rows +
 571                 (screen_desktop_layout.rows - 1 -
 572                  r % screen_desktop_layout.rows);
 573         }
 574     }
 575     g_assert_not_reached();
 576     return 0;
 577 }
 578
 579 void screen_desktop_popup(guint d, gboolean show)
 580 {
 581     Rect *a;
 582
 583     if (!show) {
 584         pager_popup_hide(desktop_cycle_popup);
 585     } else {
 586         a = screen_physical_area_monitor(0);
 587         pager_popup_position(desktop_cycle_popup, CenterGravity,
 588                              a->x + a->width / 2, a->y + a->height / 2);
 589         /* XXX the size and the font extents need to be related on some level
 590          */
 591         pager_popup_size(desktop_cycle_popup, POPUP_WIDTH, POPUP_HEIGHT);
 592
 593         pager_popup_set_text_align(desktop_cycle_popup, RR_JUSTIFY_CENTER);
 594
 595         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
 596     }
 597 }
 598
 599 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 600                            gboolean dialog, gboolean done, gboolean cancel)
 601 {
 602     static gboolean first = TRUE;
 603     static guint origd, d;
 604     guint r, c;
 605
 606     if (cancel) {
 607         d = origd;
 608         goto done_cycle;
 609     } else if (done && dialog) {
 610         goto done_cycle;
 611     }
 612     if (first) {
 613         first = FALSE;
 614         d = origd = screen_desktop;
 615     }
 616
 617     get_row_col(d, &r, &c);
 618
 619     if (linear) {
 620         switch (dir) {
 621         case OB_DIRECTION_EAST:
 622             if (d < screen_num_desktops - 1)
 623                 ++d;
 624             else if (wrap)
 625                 d = 0;
 626             break;
 627         case OB_DIRECTION_WEST:
 628             if (d > 0)
 629                 --d;
 630             else if (wrap)
 631                 d = screen_num_desktops - 1;
 632             break;
 633         default:
 634             assert(0);
 635             return screen_desktop;
 636         }
 637     } else {
 638         switch (dir) {
 639         case OB_DIRECTION_EAST:
 640             ++c;
 641             if (c >= screen_desktop_layout.columns) {
 642                 if (wrap) {
 643                     c = 0;
 644                 } else {
 645                     d = screen_desktop;
 646                     goto show_cycle_dialog;
 647                 }
 648             }
 649             d = translate_row_col(r, c);
 650             if (d >= screen_num_desktops) {
 651                 if (wrap) {
 652                     ++c;
 653                 } else {
 654                     d = screen_desktop;
 655                     goto show_cycle_dialog;
 656                 }
 657             }
 658             break;
 659         case OB_DIRECTION_WEST:
 660             --c;
 661             if (c >= screen_desktop_layout.columns) {
 662                 if (wrap) {
 663                     c = screen_desktop_layout.columns - 1;
 664                 } else {
 665                     d = screen_desktop;
 666                     goto show_cycle_dialog;
 667                 }
 668             }
 669             d = translate_row_col(r, c);
 670             if (d >= screen_num_desktops) {
 671                 if (wrap) {
 672                     --c;
 673                 } else {
 674                     d = screen_desktop;
 675                     goto show_cycle_dialog;
 676                 }
 677             }
 678             break;
 679         case OB_DIRECTION_SOUTH:
 680             ++r;
 681             if (r >= screen_desktop_layout.rows) {
 682                 if (wrap) {
 683                     r = 0;
 684                 } else {
 685                     d = screen_desktop;
 686                     goto show_cycle_dialog;
 687                 }
 688             }
 689             d = translate_row_col(r, c);
 690             if (d >= screen_num_desktops) {
 691                 if (wrap) {
 692                     ++r;
 693                 } else {
 694                     d = screen_desktop;
 695                     goto show_cycle_dialog;
 696                 }
 697             }
 698             break;
 699         case OB_DIRECTION_NORTH:
 700             --r;
 701             if (r >= screen_desktop_layout.rows) {
 702                 if (wrap) {
 703                     r = screen_desktop_layout.rows - 1;
 704                 } else {
 705                     d = screen_desktop;
 706                     goto show_cycle_dialog;
 707                 }
 708             }
 709             d = translate_row_col(r, c);
 710             if (d >= screen_num_desktops) {
 711                 if (wrap) {
 712                     --r;
 713                 } else {
 714                     d = screen_desktop;
 715                     goto show_cycle_dialog;
 716                 }
 717             }
 718             break;
 719         default:
 720             assert(0);
 721             return d = screen_desktop;
 722         }
 723
 724         d = translate_row_col(r, c);
 725     }
 726
 727 show_cycle_dialog:
 728     if (dialog) {
 729         screen_desktop_popup(d, TRUE);
 730         return d;
 731     }
 732
 733 done_cycle:
 734     first = TRUE;
 735
 736     screen_desktop_popup(0, FALSE);
 737
 738     return d;
 739 }
 740
 741 void screen_update_layout()
 742 {
 743     ObOrientation orient;
 744     ObCorner corner;
 745     guint rows;
 746     guint cols;
 747     guint32 *data;
 748     guint num;
 749     gboolean valid = FALSE;
 750
 751     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 752                     net_desktop_layout, cardinal, &data, &num)) {
 753         if (num == 3 || num == 4) {
 754
 755             if (data[0] == prop_atoms.net_wm_orientation_vert)
 756                 orient = OB_ORIENTATION_VERT;
 757             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 758                 orient = OB_ORIENTATION_HORZ;
 759             else
 760                 goto screen_update_layout_bail;
 761
 762             if (num < 4)
 763                 corner = OB_CORNER_TOPLEFT;
 764             else {
 765                 if (data[3] == prop_atoms.net_wm_topleft)
 766                     corner = OB_CORNER_TOPLEFT;
 767                 else if (data[3] == prop_atoms.net_wm_topright)
 768                     corner = OB_CORNER_TOPRIGHT;
 769                 else if (data[3] == prop_atoms.net_wm_bottomright)
 770                     corner = OB_CORNER_BOTTOMRIGHT;
 771                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 772                     corner = OB_CORNER_BOTTOMLEFT;
 773                 else
 774                     goto screen_update_layout_bail;
 775             }
 776
 777             cols = data[1];
 778             rows = data[2];
 779
 780             /* fill in a zero rows/columns */
 781             if ((cols == 0 && rows == 0)) { /* both 0's is bad data.. */
 782                 goto screen_update_layout_bail;
 783             } else {
 784                 if (cols == 0) {
 785                     cols = screen_num_desktops / rows;
 786                     if (rows * cols < screen_num_desktops)
 787                         cols++;
 788                     if (rows * cols >= screen_num_desktops + cols)
 789                         rows--;
 790                 } else if (rows == 0) {
 791                     rows = screen_num_desktops / cols;
 792                     if (cols * rows < screen_num_desktops)
 793                         rows++;
 794                     if (cols * rows >= screen_num_desktops + rows)
 795                         cols--;
 796                 }
 797             }
 798
 799             /* bounds checking */
 800             if (orient == OB_ORIENTATION_HORZ) {
 801                 cols = MIN(screen_num_desktops, cols);
 802                 rows = MIN(rows, (screen_num_desktops + cols - 1) / cols);
 803                 cols = screen_num_desktops / rows +
 804                     !!(screen_num_desktops % rows);
 805             } else {
 806                 rows = MIN(screen_num_desktops, rows);
 807                 cols = MIN(cols, (screen_num_desktops + rows - 1) / rows);
 808                 rows = screen_num_desktops / cols +
 809                     !!(screen_num_desktops % cols);
 810             }
 811
 812             valid = TRUE;
 813         }
 814     screen_update_layout_bail:
 815         g_free(data);
 816     }
 817
 818     if (!valid) {
 819         /* defaults */
 820         orient = OB_ORIENTATION_HORZ;
 821         corner = OB_CORNER_TOPLEFT;
 822         rows = 1;
 823         cols = screen_num_desktops;
 824     }
 825
 826     screen_desktop_layout.orientation = orient;
 827     screen_desktop_layout.start_corner = corner;
 828     screen_desktop_layout.rows = rows;
 829     screen_desktop_layout.columns = cols;
 830 }
 831
 832 void screen_update_desktop_names()
 833 {
 834     guint i;
 835
 836     /* empty the array */
 837     g_strfreev(screen_desktop_names);
 838     screen_desktop_names = NULL;
 839
 840     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 841                    net_desktop_names, utf8, &screen_desktop_names))
 842         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 843     else
 844         i = 0;
 845     if (i <= screen_num_desktops) {
 846         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
 847                                        screen_num_desktops + 1);
 848         screen_desktop_names[screen_num_desktops] = NULL;
 849         for (; i < screen_num_desktops; ++i)
 850             screen_desktop_names[i] = g_strdup_printf("Desktop %i", i + 1);
 851     }
 852 }
 853
 854 void screen_show_desktop(gboolean show)
 855 {
 856     GList *it;
 857
 858     if (show == screen_showing_desktop) return; /* no change */
 859
 860     screen_showing_desktop = show;
 861
 862     if (show) {
 863         /* bottom to top */
 864         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 865             if (WINDOW_IS_CLIENT(it->data)) {
 866                 ObClient *client = it->data;
 867                 client_showhide(client);
 868             }
 869         }
 870     } else {
 871         /* top to bottom */
 872         for (it = stacking_list; it; it = g_list_next(it)) {
 873             if (WINDOW_IS_CLIENT(it->data)) {
 874                 ObClient *client = it->data;
 875                 client_showhide(client);
 876             }
 877         }
 878     }
 879
 880     if (show) {
 881         /* focus desktop */
 882         for (it = focus_order; it; it = g_list_next(it)) {
 883             ObClient *c = it->data;
 884             if (c->type == OB_CLIENT_TYPE_DESKTOP &&
 885                 (c->desktop == screen_desktop || c->desktop == DESKTOP_ALL) &&
 886                 client_focus(it->data))
 887                 break;
 888         }
 889     } else {
 890         ObClient *c;
 891
 892         /* use NULL for the "old" argument because the desktop was focused
 893            and we don't want to fallback to the desktop by default */
 894         if ((c = focus_fallback_target(TRUE, NULL)))
 895             client_focus(c);
 896     }
 897
 898     show = !!show; /* make it boolean */
 899     PROP_SET32(RootWindow(ob_display, ob_screen),
 900                net_showing_desktop, cardinal, show);
 901 }
 902
 903 void screen_install_colormap(ObClient *client, gboolean install)
 904 {
 905     XWindowAttributes wa;
 906
 907     if (client == NULL) {
 908         if (install)
 909             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 910         else
 911             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 912     } else {
 913         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
 914             wa.colormap != None) {
 915             xerror_set_ignore(TRUE);
 916             if (install)
 917                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 918             else
 919                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 920             xerror_set_ignore(FALSE);
 921         }
 922     }
 923 }
 924
 925 static inline void
 926 screen_area_add_strut_left(const StrutPartial *s, const Rect *monitor_area,
 927                            gint edge, Strut *ret)
 928 {
 929     if (s->left &&
 930         ((s->left_end <= s->left_start) ||
 931          (RECT_TOP(*monitor_area) < s->left_end &&
 932           RECT_BOTTOM(*monitor_area) > s->left_start)))
 933         ret->left = MAX(ret->left, edge);
 934 }
 935
 936 static inline void
 937 screen_area_add_strut_top(const StrutPartial *s, const Rect *monitor_area,
 938                           gint edge, Strut *ret)
 939 {
 940     if (s->top &&
 941         ((s->top_end <= s->top_start) ||
 942          (RECT_LEFT(*monitor_area) < s->top_end &&
 943           RECT_RIGHT(*monitor_area) > s->top_start)))
 944         ret->top = MAX(ret->top, edge);
 945 }
 946
 947 static inline void
 948 screen_area_add_strut_right(const StrutPartial *s, const Rect *monitor_area,
 949                             gint edge, Strut *ret)
 950 {
 951     if (s->right &&
 952         ((s->right_end <= s->right_start) ||
 953          (RECT_TOP(*monitor_area) < s->right_end &&
 954           RECT_BOTTOM(*monitor_area) > s->right_start)))
 955         ret->right = MAX(ret->right, edge);
 956 }
 957
 958 static inline void
 959 screen_area_add_strut_bottom(const StrutPartial *s, const Rect *monitor_area,
 960                              gint edge, Strut *ret)
 961 {
 962     if (s->bottom &&
 963         ((s->bottom_end <= s->bottom_start) ||
 964          (RECT_LEFT(*monitor_area) < s->bottom_end &&
 965           RECT_RIGHT(*monitor_area) > s->bottom_start)))
 966         ret->bottom = MAX(ret->bottom, edge);
 967 }
 968
 969 void screen_update_areas()
 970 {
 971     guint i, x;
 972     gulong *dims;
 973     GList *it;
 974     gint o;
 975
 976     g_free(monitor_area);
 977     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
 978
 979     if (area) {
 980         for (i = 0; area[i]; ++i)
 981             g_free(area[i]);
 982         g_free(area);
 983     }
 984
 985     area = g_new(Rect*, screen_num_desktops + 2);
 986     for (i = 0; i < screen_num_desktops + 1; ++i)
 987         area[i] = g_new0(Rect, screen_num_monitors + 1);
 988     area[i] = NULL;
 989
 990     dims = g_new(gulong, 4 * screen_num_desktops);
 991
 992     for (i = 0; i < screen_num_desktops + 1; ++i) {
 993         Strut *struts;
 994         gint l, r, t, b;
 995
 996         struts = g_new0(Strut, screen_num_monitors);
 997
 998         /* calc the xinerama areas */
 999         for (x = 0; x < screen_num_monitors; ++x) {
1000             area[i][x] = monitor_area[x];
1001             if (x == 0) {
1002                 l = monitor_area[x].x;
1003                 t = monitor_area[x].y;
1004                 r = monitor_area[x].x + monitor_area[x].width - 1;
1005                 b = monitor_area[x].y + monitor_area[x].height - 1;
1006             } else {
1007                 l = MIN(l, monitor_area[x].x);
1008                 t = MIN(t, monitor_area[x].y);
1009                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
1010                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
1011             }
1012         }
1013         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
1014
1015         /* apply the struts */
1016
1017         /* find the left-most xin heads, i do this in 2 loops :| */
1018         o = area[i][0].x;
1019         for (x = 1; x < screen_num_monitors; ++x)
1020             o = MIN(o, area[i][x].x);
1021
1022         for (x = 0; x < screen_num_monitors; ++x) {
1023             for (it = client_list; it; it = g_list_next(it)) {
1024                 ObClient *c = it->data;
1025                 screen_area_add_strut_left(&c->strut,
1026                                            &monitor_area[x],
1027                                            o + c->strut.left - area[i][x].x,
1028                                            &struts[x]);
1029             }
1030             screen_area_add_strut_left(&dock_strut,
1031                                        &monitor_area[x],
1032                                        o + dock_strut.left - area[i][x].x,
1033                                        &struts[x]);
1034
1035             area[i][x].x += struts[x].left;
1036             area[i][x].width -= struts[x].left;
1037         }
1038
1039         /* find the top-most xin heads, i do this in 2 loops :| */
1040         o = area[i][0].y;
1041         for (x = 1; x < screen_num_monitors; ++x)
1042             o = MIN(o, area[i][x].y);
1043
1044         for (x = 0; x < screen_num_monitors; ++x) {
1045             for (it = client_list; it; it = g_list_next(it)) {
1046                 ObClient *c = it->data;
1047                 screen_area_add_strut_top(&c->strut,
1048                                            &monitor_area[x],
1049                                            o + c->strut.top - area[i][x].y,
1050                                            &struts[x]);
1051             }
1052             screen_area_add_strut_top(&dock_strut,
1053                                       &monitor_area[x],
1054                                       o + dock_strut.top - area[i][x].y,
1055                                       &struts[x]);
1056
1057             area[i][x].y += struts[x].top;
1058             area[i][x].height -= struts[x].top;
1059         }
1060
1061         /* find the right-most xin heads, i do this in 2 loops :| */
1062         o = area[i][0].x + area[i][0].width - 1;
1063         for (x = 1; x < screen_num_monitors; ++x)
1064             o = MAX(o, area[i][x].x + area[i][x].width - 1);
1065
1066         for (x = 0; x < screen_num_monitors; ++x) {
1067             for (it = client_list; it; it = g_list_next(it)) {
1068                 ObClient *c = it->data;
1069                 screen_area_add_strut_right(&c->strut,
1070                                            &monitor_area[x],
1071                                            (area[i][x].x +
1072                                             area[i][x].width - 1) -
1073                                             (o - c->strut.right),
1074                                             &struts[x]);
1075             }
1076             screen_area_add_strut_right(&dock_strut,
1077                                         &monitor_area[x],
1078                                         (area[i][x].x +
1079                                          area[i][x].width - 1) -
1080                                         (o - dock_strut.right),
1081                                         &struts[x]);
1082
1083             area[i][x].width -= struts[x].right;
1084         }
1085
1086         /* find the bottom-most xin heads, i do this in 2 loops :| */
1087         o = area[i][0].y + area[i][0].height - 1;
1088         for (x = 1; x < screen_num_monitors; ++x)
1089             o = MAX(o, area[i][x].y + area[i][x].height - 1);
1090
1091         for (x = 0; x < screen_num_monitors; ++x) {
1092             for (it = client_list; it; it = g_list_next(it)) {
1093                 ObClient *c = it->data;
1094                 screen_area_add_strut_bottom(&c->strut,
1095                                              &monitor_area[x],
1096                                              (area[i][x].y +
1097                                               area[i][x].height - 1) - \
1098                                              (o - c->strut.bottom),
1099                                              &struts[x]);
1100             }
1101             screen_area_add_strut_bottom(&dock_strut,
1102                                          &monitor_area[x],
1103                                          (area[i][x].y +
1104                                           area[i][x].height - 1) - \
1105                                          (o - dock_strut.bottom),
1106                                          &struts[x]);
1107
1108             area[i][x].height -= struts[x].bottom;
1109         }
1110
1111         l = RECT_LEFT(area[i][0]);
1112         t = RECT_TOP(area[i][0]);
1113         r = RECT_RIGHT(area[i][0]);
1114         b = RECT_BOTTOM(area[i][0]);
1115         for (x = 1; x < screen_num_monitors; ++x) {
1116             l = MIN(l, RECT_LEFT(area[i][x]));
1117             t = MIN(l, RECT_TOP(area[i][x]));
1118             r = MAX(r, RECT_RIGHT(area[i][x]));
1119             b = MAX(b, RECT_BOTTOM(area[i][x]));
1120         }
1121         RECT_SET(area[i][screen_num_monitors], l, t,
1122                  r - l + 1, b - t + 1);
1123
1124         /* XXX optimize when this is run? */
1125
1126         /* the area has changed, adjust all the maximized
1127            windows */
1128         for (it = client_list; it; it = g_list_next(it)) {
1129             ObClient *c = it->data;
1130             if (i < screen_num_desktops) {
1131                 if (c->desktop == i)
1132                     client_reconfigure(c);
1133             } else if (c->desktop == DESKTOP_ALL)
1134                 client_reconfigure(c);
1135         }
1136         if (i < screen_num_desktops) {
1137             /* don't set these for the 'all desktops' area */
1138             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1139             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1140             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1141             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1142         }
1143
1144         g_free(struts);
1145     }
1146
1147     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1148                 dims, 4 * screen_num_desktops);
1149
1150     g_free(dims);
1151 }
1152
1153 Rect *screen_area(guint desktop)
1154 {
1155     return screen_area_monitor(desktop, screen_num_monitors);
1156 }
1157
1158 Rect *screen_area_monitor(guint desktop, guint head)
1159 {
1160     if (head > screen_num_monitors)
1161         return NULL;
1162     if (desktop >= screen_num_desktops) {
1163         if (desktop == DESKTOP_ALL)
1164             return &area[screen_num_desktops][head];
1165         return NULL;
1166     }
1167     return &area[desktop][head];
1168 }
1169
1170 guint screen_find_monitor(Rect *search)
1171 {
1172     guint i;
1173     guint most = 0;
1174     guint mostv = 0;
1175
1176     for (i = 0; i < screen_num_monitors; ++i) {
1177         Rect *area = screen_physical_area_monitor(i);
1178         if (RECT_INTERSECTS_RECT(*area, *search)) {
1179             Rect r;
1180             guint v;
1181
1182             RECT_SET_INTERSECTION(r, *area, *search);
1183             v = r.width * r.height;
1184
1185             if (v > mostv) {
1186                 mostv = v;
1187                 most = i;
1188             }
1189         }
1190     }
1191     return most;
1192 }
1193
1194 Rect *screen_physical_area()
1195 {
1196     return screen_physical_area_monitor(screen_num_monitors);
1197 }
1198
1199 Rect *screen_physical_area_monitor(guint head)
1200 {
1201     if (head > screen_num_monitors)
1202         return NULL;
1203     return &monitor_area[head];
1204 }
1205
1206 void screen_set_root_cursor()
1207 {
1208     if (sn_app_starting())
1209         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1210                       ob_cursor(OB_CURSOR_BUSY));
1211     else
1212         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1213                       ob_cursor(OB_CURSOR_POINTER));
1214 }
1215
1216 gboolean screen_pointer_pos(gint *x, gint *y)
1217 {
1218     Window w;
1219     gint i;
1220     guint u;
1221
1222     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1223                            &w, &w, x, y, &i, &i, &u);
1224 }