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 "session.h"
  32 #include "frame.h"
  33 #include "event.h"
  34 #include "focus.h"
  35 #include "popup.h"
  36 #include "extensions.h"
  37 #include "render/render.h"
  38 #include "gettext.h"
  39
  40 #include <X11/Xlib.h>
  41 #ifdef HAVE_UNISTD_H
  42 #  include <sys/types.h>
  43 #  include <unistd.h>
  44 #endif
  45 #include <assert.h>
  46
  47 /*! The event mask to grab on the root window */
  48 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
  49                         EnterWindowMask | LeaveWindowMask | \
  50                         SubstructureRedirectMask | FocusChangeMask | \
  51                         ButtonPressMask | ButtonReleaseMask | ButtonMotionMask)
  52
  53 guint    screen_num_desktops;
  54 guint    screen_num_monitors;
  55 guint    screen_desktop;
  56 guint    screen_last_desktop;
  57 Size     screen_physical_size;
  58 gboolean screen_showing_desktop;
  59 DesktopLayout screen_desktop_layout;
  60 gchar  **screen_desktop_names;
  61 Window   screen_support_win;
  62 Time     screen_desktop_user_time = CurrentTime;
  63
  64 static Rect  **area; /* array of desktop holding array of xinerama areas */
  65 static Rect  *monitor_area;
  66
  67 static ObPagerPopup *desktop_cycle_popup;
  68
  69 static gboolean replace_wm()
  70 {
  71     gchar *wm_sn;
  72     Atom wm_sn_atom;
  73     Window current_wm_sn_owner;
  74     Time timestamp;
  75
  76     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
  77     wm_sn_atom = XInternAtom(ob_display, wm_sn, FALSE);
  78     g_free(wm_sn);
  79
  80     current_wm_sn_owner = XGetSelectionOwner(ob_display, wm_sn_atom);
  81     if (current_wm_sn_owner == screen_support_win)
  82         current_wm_sn_owner = None;
  83     if (current_wm_sn_owner) {
  84         if (!ob_replace_wm) {
  85             g_message(_("A window manager is already running on screen %d"),
  86                       ob_screen);
  87             return FALSE;
  88         }
  89         xerror_set_ignore(TRUE);
  90         xerror_occured = FALSE;
  91
  92         /* We want to find out when the current selection owner dies */
  93         XSelectInput(ob_display, current_wm_sn_owner, StructureNotifyMask);
  94         XSync(ob_display, FALSE);
  95
  96         xerror_set_ignore(FALSE);
  97         if (xerror_occured)
  98             current_wm_sn_owner = None;
  99     }
 100
 101     {
 102         /* Generate a timestamp */
 103         XEvent event;
 104
 105         XSelectInput(ob_display, screen_support_win, PropertyChangeMask);
 106
 107         XChangeProperty(ob_display, screen_support_win,
 108                         prop_atoms.wm_class, prop_atoms.string,
 109                         8, PropModeAppend, NULL, 0);
 110         XWindowEvent(ob_display, screen_support_win,
 111                      PropertyChangeMask, &event);
 112
 113         XSelectInput(ob_display, screen_support_win, NoEventMask);
 114
 115         timestamp = event.xproperty.time;
 116     }
 117
 118     XSetSelectionOwner(ob_display, wm_sn_atom, screen_support_win,
 119                        timestamp);
 120
 121     if (XGetSelectionOwner(ob_display, wm_sn_atom) != screen_support_win) {
 122         g_message(_("Could not acquire window manager selection on screen %d"),
 123                   ob_screen);
 124         return FALSE;
 125     }
 126
 127     /* Wait for old window manager to go away */
 128     if (current_wm_sn_owner) {
 129       XEvent event;
 130       gulong wait = 0;
 131       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
 132
 133       while (wait < timeout) {
 134           if (XCheckWindowEvent(ob_display, current_wm_sn_owner,
 135                                 StructureNotifyMask, &event) &&
 136               event.type == DestroyNotify)
 137               break;
 138           g_usleep(G_USEC_PER_SEC / 10);
 139           wait += G_USEC_PER_SEC / 10;
 140       }
 141
 142       if (wait >= timeout) {
 143           g_message(_("The WM on screen %d is not exiting"), ob_screen);
 144           return FALSE;
 145       }
 146     }
 147
 148     /* Send client message indicating that we are now the WM */
 149     prop_message(RootWindow(ob_display, ob_screen), prop_atoms.manager,
 150                  timestamp, wm_sn_atom, screen_support_win, 0,
 151                  SubstructureNotifyMask);
 152
 153     return TRUE;
 154 }
 155
 156 gboolean screen_annex(const gchar *program_name)
 157 {
 158     XSetWindowAttributes attrib;
 159     pid_t pid;
 160     gint i, num_support;
 161     Atom *prop_atoms_start, *wm_supported_pos;
 162     gulong *supported;
 163
 164     /* create the netwm support window */
 165     attrib.override_redirect = TRUE;
 166     screen_support_win = XCreateWindow(ob_display,
 167                                        RootWindow(ob_display, ob_screen),
 168                                        -100, -100, 1, 1, 0,
 169                                        CopyFromParent, InputOutput,
 170                                        CopyFromParent,
 171                                        CWOverrideRedirect, &attrib);
 172     XMapWindow(ob_display, screen_support_win);
 173     XLowerWindow(ob_display, screen_support_win);
 174
 175     if (!replace_wm()) {
 176         XDestroyWindow(ob_display, screen_support_win);
 177         return FALSE;
 178     }
 179
 180     xerror_set_ignore(TRUE);
 181     xerror_occured = FALSE;
 182     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 183                  ROOT_EVENTMASK);
 184     xerror_set_ignore(FALSE);
 185     if (xerror_occured) {
 186         g_message(_("A window manager is already running on screen %d"),
 187                   ob_screen);
 188
 189         XDestroyWindow(ob_display, screen_support_win);
 190         return FALSE;
 191     }
 192
 193
 194     screen_set_root_cursor();
 195
 196     /* set the OPENBOX_PID hint */
 197     pid = getpid();
 198     PROP_SET32(RootWindow(ob_display, ob_screen),
 199                openbox_pid, cardinal, pid);
 200
 201     /* set supporting window */
 202     PROP_SET32(RootWindow(ob_display, ob_screen),
 203                net_supporting_wm_check, window, screen_support_win);
 204
 205     /* set properties on the supporting window */
 206     PROP_SETS(screen_support_win, net_wm_name, program_name);
 207     PROP_SET32(screen_support_win, net_supporting_wm_check,
 208                window, screen_support_win);
 209
 210     /* set the _NET_SUPPORTED_ATOMS hint */
 211
 212     /* this is all the atoms after net_supported in the prop_atoms struct */
 213     prop_atoms_start = (Atom*)&prop_atoms;
 214     wm_supported_pos = (Atom*)&(prop_atoms.net_supported);
 215     num_support = sizeof(prop_atoms) / sizeof(Atom) -
 216         (wm_supported_pos - prop_atoms_start) - 1;
 217     i = 0;
 218     supported = g_new(gulong, num_support);
 219     supported[i++] = prop_atoms.net_supporting_wm_check;
 220     supported[i++] = prop_atoms.net_wm_full_placement;
 221     supported[i++] = prop_atoms.net_current_desktop;
 222     supported[i++] = prop_atoms.net_number_of_desktops;
 223     supported[i++] = prop_atoms.net_desktop_geometry;
 224     supported[i++] = prop_atoms.net_desktop_viewport;
 225     supported[i++] = prop_atoms.net_active_window;
 226     supported[i++] = prop_atoms.net_workarea;
 227     supported[i++] = prop_atoms.net_client_list;
 228     supported[i++] = prop_atoms.net_client_list_stacking;
 229     supported[i++] = prop_atoms.net_desktop_names;
 230     supported[i++] = prop_atoms.net_close_window;
 231     supported[i++] = prop_atoms.net_desktop_layout;
 232     supported[i++] = prop_atoms.net_showing_desktop;
 233     supported[i++] = prop_atoms.net_wm_name;
 234     supported[i++] = prop_atoms.net_wm_visible_name;
 235     supported[i++] = prop_atoms.net_wm_icon_name;
 236     supported[i++] = prop_atoms.net_wm_visible_icon_name;
 237     supported[i++] = prop_atoms.net_wm_desktop;
 238     supported[i++] = prop_atoms.net_wm_strut;
 239     supported[i++] = prop_atoms.net_wm_strut_partial;
 240     supported[i++] = prop_atoms.net_wm_icon;
 241     supported[i++] = prop_atoms.net_wm_icon_geometry;
 242     supported[i++] = prop_atoms.net_wm_window_type;
 243     supported[i++] = prop_atoms.net_wm_window_type_desktop;
 244     supported[i++] = prop_atoms.net_wm_window_type_dock;
 245     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
 246     supported[i++] = prop_atoms.net_wm_window_type_menu;
 247     supported[i++] = prop_atoms.net_wm_window_type_utility;
 248     supported[i++] = prop_atoms.net_wm_window_type_splash;
 249     supported[i++] = prop_atoms.net_wm_window_type_dialog;
 250     supported[i++] = prop_atoms.net_wm_window_type_normal;
 251     supported[i++] = prop_atoms.net_wm_allowed_actions;
 252     supported[i++] = prop_atoms.net_wm_action_move;
 253     supported[i++] = prop_atoms.net_wm_action_resize;
 254     supported[i++] = prop_atoms.net_wm_action_minimize;
 255     supported[i++] = prop_atoms.net_wm_action_shade;
 256     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
 257     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
 258     supported[i++] = prop_atoms.net_wm_action_fullscreen;
 259     supported[i++] = prop_atoms.net_wm_action_change_desktop;
 260     supported[i++] = prop_atoms.net_wm_action_close;
 261     supported[i++] = prop_atoms.net_wm_state;
 262     supported[i++] = prop_atoms.net_wm_state_modal;
 263     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
 264     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
 265     supported[i++] = prop_atoms.net_wm_state_shaded;
 266     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
 267     supported[i++] = prop_atoms.net_wm_state_skip_pager;
 268     supported[i++] = prop_atoms.net_wm_state_hidden;
 269     supported[i++] = prop_atoms.net_wm_state_fullscreen;
 270     supported[i++] = prop_atoms.net_wm_state_above;
 271     supported[i++] = prop_atoms.net_wm_state_below;
 272     supported[i++] = prop_atoms.net_wm_state_demands_attention;
 273     supported[i++] = prop_atoms.net_moveresize_window;
 274     supported[i++] = prop_atoms.net_wm_moveresize;
 275     supported[i++] = prop_atoms.net_wm_user_time;
 276     supported[i++] = prop_atoms.net_frame_extents;
 277     supported[i++] = prop_atoms.net_startup_id;
 278 #ifdef SYNC
 279     supported[i++] = prop_atoms.net_wm_sync_request;
 280     supported[i++] = prop_atoms.net_wm_sync_request_counter;
 281 #endif
 282
 283     supported[i++] = prop_atoms.kde_wm_change_state;
 284     supported[i++] = prop_atoms.kde_net_wm_frame_strut;
 285     supported[i++] = prop_atoms.kde_net_wm_window_type_override;
 286
 287     supported[i++] = prop_atoms.openbox_wm_state_undecorated;
 288     supported[i++] = prop_atoms.openbox_pid;
 289     supported[i++] = prop_atoms.openbox_config;
 290     supported[i++] = prop_atoms.openbox_control;
 291     g_assert(i == num_support);
 292
 293     PROP_SETA32(RootWindow(ob_display, ob_screen),
 294                 net_supported, atom, supported, num_support);
 295     g_free(supported);
 296
 297     return TRUE;
 298 }
 299
 300 void screen_startup(gboolean reconfig)
 301 {
 302     GSList *it;
 303     guint i;
 304
 305     desktop_cycle_popup = pager_popup_new(FALSE);
 306     pager_popup_height(desktop_cycle_popup, POPUP_HEIGHT);
 307
 308     if (!reconfig)
 309         /* get the initial size */
 310         screen_resize();
 311
 312     /* get the names */
 313     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 314                    net_desktop_names, utf8, &screen_desktop_names))
 315         for (i = 0; screen_desktop_names[i]; ++i);
 316     else
 317         i = 0;
 318     for (it = g_slist_nth(config_desktops_names, i); it;
 319          it = g_slist_next(it), ++i)
 320     {
 321         screen_desktop_names = g_renew(gchar*, screen_desktop_names, i + 2);
 322         screen_desktop_names[i+1] = NULL;
 323         screen_desktop_names[i] = g_strdup(it->data);
 324     }
 325     /* then set the names */
 326     PROP_SETSS(RootWindow(ob_display, ob_screen),
 327                net_desktop_names, screen_desktop_names);
 328     g_strfreev(screen_desktop_names);
 329     screen_desktop_names = NULL;
 330
 331     if (!reconfig)
 332         screen_num_desktops = 0;
 333     screen_set_num_desktops(config_desktops_num);
 334     if (!reconfig) {
 335         guint32 d;
 336         /* start on the current desktop when a wm was already running */
 337         if (PROP_GET32(RootWindow(ob_display, ob_screen),
 338                        net_current_desktop, cardinal, &d) &&
 339             d < screen_num_desktops)
 340         {
 341             screen_set_desktop(d, FALSE);
 342         } else if (session_desktop >= 0)
 343             screen_set_desktop(MIN((guint)session_desktop,
 344                                    screen_num_desktops), FALSE);
 345         else
 346             screen_set_desktop(MIN(config_screen_firstdesk,
 347                                    screen_num_desktops) - 1, FALSE);
 348
 349         /* don't start in showing-desktop mode */
 350         screen_showing_desktop = FALSE;
 351         PROP_SET32(RootWindow(ob_display, ob_screen),
 352                    net_showing_desktop, cardinal, screen_showing_desktop);
 353
 354         screen_update_layout();
 355     }
 356 }
 357
 358 void screen_shutdown(gboolean reconfig)
 359 {
 360     Rect **r;
 361
 362     pager_popup_free(desktop_cycle_popup);
 363
 364     if (!reconfig) {
 365         XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 366                      NoEventMask);
 367
 368         /* we're not running here no more! */
 369         PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 370         /* not without us */
 371         PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 372         /* don't keep this mode */
 373         PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 374
 375         XDestroyWindow(ob_display, screen_support_win);
 376     }
 377
 378     g_strfreev(screen_desktop_names);
 379     screen_desktop_names = NULL;
 380     for (r = area; *r; ++r)
 381         g_free(*r);
 382     g_free(area);
 383     area = NULL;
 384 }
 385
 386 void screen_resize()
 387 {
 388     static gint oldw = 0, oldh = 0;
 389     gint w, h;
 390     GList *it;
 391     gulong geometry[2];
 392
 393     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 394     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 395
 396     if (w == oldw && h == oldh) return;
 397
 398     oldw = w; oldh = h;
 399
 400     /* Set the _NET_DESKTOP_GEOMETRY hint */
 401     screen_physical_size.width = geometry[0] = w;
 402     screen_physical_size.height = geometry[1] = h;
 403     PROP_SETA32(RootWindow(ob_display, ob_screen),
 404                 net_desktop_geometry, cardinal, geometry, 2);
 405
 406     if (ob_state() == OB_STATE_STARTING)
 407         return;
 408
 409     screen_update_areas();
 410     dock_configure();
 411
 412     for (it = client_list; it; it = g_list_next(it))
 413         client_move_onscreen(it->data, FALSE);
 414 }
 415
 416 void screen_set_num_desktops(guint num)
 417 {
 418     guint old;
 419     gulong *viewport;
 420     GList *it;
 421
 422     g_assert(num > 0);
 423
 424     if (screen_num_desktops == num) return;
 425
 426     old = screen_num_desktops;
 427     screen_num_desktops = num;
 428     PROP_SET32(RootWindow(ob_display, ob_screen),
 429                net_number_of_desktops, cardinal, num);
 430
 431     /* set the viewport hint */
 432     viewport = g_new0(gulong, num * 2);
 433     PROP_SETA32(RootWindow(ob_display, ob_screen),
 434                 net_desktop_viewport, cardinal, viewport, num * 2);
 435     g_free(viewport);
 436
 437     /* the number of rows/columns will differ */
 438     screen_update_layout();
 439
 440     /* move windows on desktops that will no longer exist! */
 441     for (it = client_list; it; it = g_list_next(it)) {
 442         ObClient *c = it->data;
 443         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 444             client_set_desktop(c, num - 1, FALSE);
 445     }
 446
 447     /* change our struts/area to match (after moving windows) */
 448     screen_update_areas();
 449
 450     /* may be some unnamed desktops that we need to fill in with names
 451      (after updating the areas so the popup can resize) */
 452     screen_update_desktop_names();
 453
 454     /* change our desktop if we're on one that no longer exists! */
 455     if (screen_desktop >= screen_num_desktops)
 456         screen_set_desktop(num - 1, TRUE);
 457 }
 458
 459 void screen_set_desktop(guint num, gboolean dofocus)
 460 {
 461     ObClient *c;
 462     GList *it;
 463     guint old;
 464
 465     g_assert(num < screen_num_desktops);
 466
 467     old = screen_desktop;
 468     screen_desktop = num;
 469     PROP_SET32(RootWindow(ob_display, ob_screen),
 470                net_current_desktop, cardinal, num);
 471
 472     if (old == num) return;
 473
 474     screen_last_desktop = old;
 475
 476     ob_debug("Moving to desktop %d\n", num+1);
 477
 478     if (moveresize_client)
 479         client_set_desktop(moveresize_client, num, TRUE);
 480
 481     /* show windows before hiding the rest to lessen the enter/leave events */
 482
 483     /* show/hide windows from top to bottom */
 484     for (it = stacking_list; it; it = g_list_next(it)) {
 485         if (WINDOW_IS_CLIENT(it->data)) {
 486             ObClient *c = it->data;
 487             client_show(c);
 488         }
 489     }
 490
 491     /* hide windows from bottom to top */
 492     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 493         if (WINDOW_IS_CLIENT(it->data)) {
 494             ObClient *c = it->data;
 495             client_hide(c);
 496         }
 497     }
 498
 499     /* have to try focus here because when you leave an empty desktop
 500        there is no focus out to watch for */
 501     if (dofocus && (c = focus_fallback_target(TRUE, focus_client))) {
 502         /* reduce flicker by hiliting now rather than waiting for the server
 503            FocusIn event */
 504         frame_adjust_focus(c->frame, TRUE);
 505         client_focus(c);
 506     }
 507
 508     event_ignore_queued_enters();
 509
 510     if (event_curtime != CurrentTime)
 511         screen_desktop_user_time = event_curtime;
 512 }
 513
 514 static void get_row_col(guint d, guint *r, guint *c)
 515 {
 516     switch (screen_desktop_layout.orientation) {
 517     case OB_ORIENTATION_HORZ:
 518         switch (screen_desktop_layout.start_corner) {
 519         case OB_CORNER_TOPLEFT:
 520             *r = d / screen_desktop_layout.columns;
 521             *c = d % screen_desktop_layout.columns;
 522             break;
 523         case OB_CORNER_BOTTOMLEFT:
 524             *r = screen_desktop_layout.rows - 1 -
 525                 d / screen_desktop_layout.columns;
 526             *c = d % screen_desktop_layout.columns;
 527             break;
 528         case OB_CORNER_TOPRIGHT:
 529             *r = d / screen_desktop_layout.columns;
 530             *c = screen_desktop_layout.columns - 1 -
 531                 d % screen_desktop_layout.columns;
 532             break;
 533         case OB_CORNER_BOTTOMRIGHT:
 534             *r = screen_desktop_layout.rows - 1 -
 535                 d / screen_desktop_layout.columns;
 536             *c = screen_desktop_layout.columns - 1 -
 537                 d % screen_desktop_layout.columns;
 538             break;
 539         }
 540         break;
 541     case OB_ORIENTATION_VERT:
 542         switch (screen_desktop_layout.start_corner) {
 543         case OB_CORNER_TOPLEFT:
 544             *r = d % screen_desktop_layout.rows;
 545             *c = d / screen_desktop_layout.rows;
 546             break;
 547         case OB_CORNER_BOTTOMLEFT:
 548             *r = screen_desktop_layout.rows - 1 -
 549                 d % screen_desktop_layout.rows;
 550             *c = d / screen_desktop_layout.rows;
 551             break;
 552         case OB_CORNER_TOPRIGHT:
 553             *r = d % screen_desktop_layout.rows;
 554             *c = screen_desktop_layout.columns - 1 -
 555                 d / screen_desktop_layout.rows;
 556             break;
 557         case OB_CORNER_BOTTOMRIGHT:
 558             *r = screen_desktop_layout.rows - 1 -
 559                 d % screen_desktop_layout.rows;
 560             *c = screen_desktop_layout.columns - 1 -
 561                 d / screen_desktop_layout.rows;
 562             break;
 563         }
 564         break;
 565     }
 566 }
 567
 568 static guint translate_row_col(guint r, guint c)
 569 {
 570     switch (screen_desktop_layout.orientation) {
 571     case OB_ORIENTATION_HORZ:
 572         switch (screen_desktop_layout.start_corner) {
 573         case OB_CORNER_TOPLEFT:
 574             return r % screen_desktop_layout.rows *
 575                 screen_desktop_layout.columns +
 576                 c % screen_desktop_layout.columns;
 577         case OB_CORNER_BOTTOMLEFT:
 578             return (screen_desktop_layout.rows - 1 -
 579                     r % screen_desktop_layout.rows) *
 580                 screen_desktop_layout.columns +
 581                 c % screen_desktop_layout.columns;
 582         case OB_CORNER_TOPRIGHT:
 583             return r % screen_desktop_layout.rows *
 584                 screen_desktop_layout.columns +
 585                 (screen_desktop_layout.columns - 1 -
 586                  c % screen_desktop_layout.columns);
 587         case OB_CORNER_BOTTOMRIGHT:
 588             return (screen_desktop_layout.rows - 1 -
 589                     r % screen_desktop_layout.rows) *
 590                 screen_desktop_layout.columns +
 591                 (screen_desktop_layout.columns - 1 -
 592                  c % screen_desktop_layout.columns);
 593         }
 594     case OB_ORIENTATION_VERT:
 595         switch (screen_desktop_layout.start_corner) {
 596         case OB_CORNER_TOPLEFT:
 597             return c % screen_desktop_layout.columns *
 598                 screen_desktop_layout.rows +
 599                 r % screen_desktop_layout.rows;
 600         case OB_CORNER_BOTTOMLEFT:
 601             return c % screen_desktop_layout.columns *
 602                 screen_desktop_layout.rows +
 603                 (screen_desktop_layout.rows - 1 -
 604                  r % screen_desktop_layout.rows);
 605         case OB_CORNER_TOPRIGHT:
 606             return (screen_desktop_layout.columns - 1 -
 607                     c % screen_desktop_layout.columns) *
 608                 screen_desktop_layout.rows +
 609                 r % screen_desktop_layout.rows;
 610         case OB_CORNER_BOTTOMRIGHT:
 611             return (screen_desktop_layout.columns - 1 -
 612                     c % screen_desktop_layout.columns) *
 613                 screen_desktop_layout.rows +
 614                 (screen_desktop_layout.rows - 1 -
 615                  r % screen_desktop_layout.rows);
 616         }
 617     }
 618     g_assert_not_reached();
 619     return 0;
 620 }
 621
 622 void screen_desktop_popup(guint d, gboolean show)
 623 {
 624     Rect *a;
 625
 626     if (!show) {
 627         pager_popup_hide(desktop_cycle_popup);
 628     } else {
 629         a = screen_physical_area_monitor(0);
 630         pager_popup_position(desktop_cycle_popup, CenterGravity,
 631                              a->x + a->width / 2, a->y + a->height / 2);
 632         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
 633     }
 634 }
 635
 636 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 637                            gboolean dialog, gboolean done, gboolean cancel)
 638 {
 639     static gboolean first = TRUE;
 640     static guint origd, d;
 641     guint r, c;
 642
 643     if (cancel) {
 644         d = origd;
 645         goto done_cycle;
 646     } else if (done && dialog) {
 647         goto done_cycle;
 648     }
 649     if (first) {
 650         first = FALSE;
 651         d = origd = screen_desktop;
 652     }
 653
 654     get_row_col(d, &r, &c);
 655
 656     if (linear) {
 657         switch (dir) {
 658         case OB_DIRECTION_EAST:
 659             if (d < screen_num_desktops - 1)
 660                 ++d;
 661             else if (wrap)
 662                 d = 0;
 663             break;
 664         case OB_DIRECTION_WEST:
 665             if (d > 0)
 666                 --d;
 667             else if (wrap)
 668                 d = screen_num_desktops - 1;
 669             break;
 670         default:
 671             assert(0);
 672             return screen_desktop;
 673         }
 674     } else {
 675         switch (dir) {
 676         case OB_DIRECTION_EAST:
 677             ++c;
 678             if (c >= screen_desktop_layout.columns) {
 679                 if (wrap) {
 680                     c = 0;
 681                 } else {
 682                     d = screen_desktop;
 683                     goto show_cycle_dialog;
 684                 }
 685             }
 686             d = translate_row_col(r, c);
 687             if (d >= screen_num_desktops) {
 688                 if (wrap) {
 689                     ++c;
 690                 } else {
 691                     d = screen_desktop;
 692                     goto show_cycle_dialog;
 693                 }
 694             }
 695             break;
 696         case OB_DIRECTION_WEST:
 697             --c;
 698             if (c >= screen_desktop_layout.columns) {
 699                 if (wrap) {
 700                     c = screen_desktop_layout.columns - 1;
 701                 } else {
 702                     d = screen_desktop;
 703                     goto show_cycle_dialog;
 704                 }
 705             }
 706             d = translate_row_col(r, c);
 707             if (d >= screen_num_desktops) {
 708                 if (wrap) {
 709                     --c;
 710                 } else {
 711                     d = screen_desktop;
 712                     goto show_cycle_dialog;
 713                 }
 714             }
 715             break;
 716         case OB_DIRECTION_SOUTH:
 717             ++r;
 718             if (r >= screen_desktop_layout.rows) {
 719                 if (wrap) {
 720                     r = 0;
 721                 } else {
 722                     d = screen_desktop;
 723                     goto show_cycle_dialog;
 724                 }
 725             }
 726             d = translate_row_col(r, c);
 727             if (d >= screen_num_desktops) {
 728                 if (wrap) {
 729                     ++r;
 730                 } else {
 731                     d = screen_desktop;
 732                     goto show_cycle_dialog;
 733                 }
 734             }
 735             break;
 736         case OB_DIRECTION_NORTH:
 737             --r;
 738             if (r >= screen_desktop_layout.rows) {
 739                 if (wrap) {
 740                     r = screen_desktop_layout.rows - 1;
 741                 } else {
 742                     d = screen_desktop;
 743                     goto show_cycle_dialog;
 744                 }
 745             }
 746             d = translate_row_col(r, c);
 747             if (d >= screen_num_desktops) {
 748                 if (wrap) {
 749                     --r;
 750                 } else {
 751                     d = screen_desktop;
 752                     goto show_cycle_dialog;
 753                 }
 754             }
 755             break;
 756         default:
 757             assert(0);
 758             return d = screen_desktop;
 759         }
 760
 761         d = translate_row_col(r, c);
 762     }
 763
 764 show_cycle_dialog:
 765     if (dialog) {
 766         screen_desktop_popup(d, TRUE);
 767         return d;
 768     }
 769
 770 done_cycle:
 771     first = TRUE;
 772
 773     screen_desktop_popup(0, FALSE);
 774
 775     return d;
 776 }
 777
 778 void screen_update_layout()
 779 {
 780     ObOrientation orient;
 781     ObCorner corner;
 782     guint rows;
 783     guint cols;
 784     guint32 *data;
 785     guint num;
 786     gboolean valid = FALSE;
 787
 788     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 789                     net_desktop_layout, cardinal, &data, &num)) {
 790         if (num == 3 || num == 4) {
 791
 792             if (data[0] == prop_atoms.net_wm_orientation_vert)
 793                 orient = OB_ORIENTATION_VERT;
 794             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 795                 orient = OB_ORIENTATION_HORZ;
 796             else
 797                 goto screen_update_layout_bail;
 798
 799             if (num < 4)
 800                 corner = OB_CORNER_TOPLEFT;
 801             else {
 802                 if (data[3] == prop_atoms.net_wm_topleft)
 803                     corner = OB_CORNER_TOPLEFT;
 804                 else if (data[3] == prop_atoms.net_wm_topright)
 805                     corner = OB_CORNER_TOPRIGHT;
 806                 else if (data[3] == prop_atoms.net_wm_bottomright)
 807                     corner = OB_CORNER_BOTTOMRIGHT;
 808                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 809                     corner = OB_CORNER_BOTTOMLEFT;
 810                 else
 811                     goto screen_update_layout_bail;
 812             }
 813
 814             cols = data[1];
 815             rows = data[2];
 816
 817             /* fill in a zero rows/columns */
 818             if ((cols == 0 && rows == 0)) { /* both 0's is bad data.. */
 819                 goto screen_update_layout_bail;
 820             } else {
 821                 if (cols == 0) {
 822                     cols = screen_num_desktops / rows;
 823                     if (rows * cols < screen_num_desktops)
 824                         cols++;
 825                     if (rows * cols >= screen_num_desktops + cols)
 826                         rows--;
 827                 } else if (rows == 0) {
 828                     rows = screen_num_desktops / cols;
 829                     if (cols * rows < screen_num_desktops)
 830                         rows++;
 831                     if (cols * rows >= screen_num_desktops + rows)
 832                         cols--;
 833                 }
 834             }
 835
 836             /* bounds checking */
 837             if (orient == OB_ORIENTATION_HORZ) {
 838                 cols = MIN(screen_num_desktops, cols);
 839                 rows = MIN(rows, (screen_num_desktops + cols - 1) / cols);
 840                 cols = screen_num_desktops / rows +
 841                     !!(screen_num_desktops % rows);
 842             } else {
 843                 rows = MIN(screen_num_desktops, rows);
 844                 cols = MIN(cols, (screen_num_desktops + rows - 1) / rows);
 845                 rows = screen_num_desktops / cols +
 846                     !!(screen_num_desktops % cols);
 847             }
 848
 849             valid = TRUE;
 850         }
 851     screen_update_layout_bail:
 852         g_free(data);
 853     }
 854
 855     if (!valid) {
 856         /* defaults */
 857         orient = OB_ORIENTATION_HORZ;
 858         corner = OB_CORNER_TOPLEFT;
 859         rows = 1;
 860         cols = screen_num_desktops;
 861     }
 862
 863     screen_desktop_layout.orientation = orient;
 864     screen_desktop_layout.start_corner = corner;
 865     screen_desktop_layout.rows = rows;
 866     screen_desktop_layout.columns = cols;
 867 }
 868
 869 void screen_update_desktop_names()
 870 {
 871     guint i;
 872
 873     /* empty the array */
 874     g_strfreev(screen_desktop_names);
 875     screen_desktop_names = NULL;
 876
 877     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 878                    net_desktop_names, utf8, &screen_desktop_names))
 879         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 880     else
 881         i = 0;
 882     if (i <= screen_num_desktops) {
 883         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
 884                                        screen_num_desktops + 1);
 885         screen_desktop_names[screen_num_desktops] = NULL;
 886         for (; i < screen_num_desktops; ++i)
 887             screen_desktop_names[i] = g_strdup_printf("desktop %i", i + 1);
 888     }
 889
 890     /* resize the pager for these names */
 891     pager_popup_width_to_strings(desktop_cycle_popup,
 892                                  screen_desktop_names,
 893                                  screen_num_desktops,
 894                                  MAX(screen_physical_area_monitor(0)->width/3,
 895                                      POPUP_WIDTH));
 896 }
 897
 898 void screen_show_desktop(gboolean show, gboolean restore_focus)
 899 {
 900     GList *it;
 901
 902     if (show == screen_showing_desktop) return; /* no change */
 903
 904     screen_showing_desktop = show;
 905
 906     if (show) {
 907         /* bottom to top */
 908         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 909             if (WINDOW_IS_CLIENT(it->data)) {
 910                 ObClient *client = it->data;
 911                 client_showhide(client);
 912             }
 913         }
 914     } else {
 915         /* top to bottom */
 916         for (it = stacking_list; it; it = g_list_next(it)) {
 917             if (WINDOW_IS_CLIENT(it->data)) {
 918                 ObClient *client = it->data;
 919                 client_showhide(client);
 920             }
 921         }
 922     }
 923
 924     if (show) {
 925         /* focus desktop */
 926         for (it = focus_order; it; it = g_list_next(it)) {
 927             ObClient *c = it->data;
 928             if (c->type == OB_CLIENT_TYPE_DESKTOP &&
 929                 (c->desktop == screen_desktop || c->desktop == DESKTOP_ALL) &&
 930                 client_focus(it->data))
 931                 break;
 932         }
 933     } else if (restore_focus) {
 934         ObClient *c;
 935
 936         /* use NULL for the "old" argument because the desktop was focused
 937            and we don't want to fallback to the desktop by default */
 938         if ((c = focus_fallback_target(TRUE, NULL)))
 939             client_focus(c);
 940     }
 941
 942     show = !!show; /* make it boolean */
 943     PROP_SET32(RootWindow(ob_display, ob_screen),
 944                net_showing_desktop, cardinal, show);
 945 }
 946
 947 void screen_install_colormap(ObClient *client, gboolean install)
 948 {
 949     if (client == NULL) {
 950         if (install)
 951             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 952         else
 953             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 954     } else {
 955         xerror_set_ignore(TRUE);
 956         if (install) {
 957             if (client->colormap != None)
 958                 XInstallColormap(RrDisplay(ob_rr_inst), client->colormap);
 959         } else
 960             XUninstallColormap(RrDisplay(ob_rr_inst), client->colormap);
 961         xerror_set_ignore(FALSE);
 962     }
 963 }
 964
 965 static inline void
 966 screen_area_add_strut_left(const StrutPartial *s, const Rect *monitor_area,
 967                            gint edge, Strut *ret)
 968 {
 969     if (s->left &&
 970         ((s->left_end <= s->left_start) ||
 971          (RECT_TOP(*monitor_area) < s->left_end &&
 972           RECT_BOTTOM(*monitor_area) > s->left_start)))
 973         ret->left = MAX(ret->left, edge);
 974 }
 975
 976 static inline void
 977 screen_area_add_strut_top(const StrutPartial *s, const Rect *monitor_area,
 978                           gint edge, Strut *ret)
 979 {
 980     if (s->top &&
 981         ((s->top_end <= s->top_start) ||
 982          (RECT_LEFT(*monitor_area) < s->top_end &&
 983           RECT_RIGHT(*monitor_area) > s->top_start)))
 984         ret->top = MAX(ret->top, edge);
 985 }
 986
 987 static inline void
 988 screen_area_add_strut_right(const StrutPartial *s, const Rect *monitor_area,
 989                             gint edge, Strut *ret)
 990 {
 991     if (s->right &&
 992         ((s->right_end <= s->right_start) ||
 993          (RECT_TOP(*monitor_area) < s->right_end &&
 994           RECT_BOTTOM(*monitor_area) > s->right_start)))
 995         ret->right = MAX(ret->right, edge);
 996 }
 997
 998 static inline void
 999 screen_area_add_strut_bottom(const StrutPartial *s, const Rect *monitor_area,
1000                              gint edge, Strut *ret)
1001 {
1002     if (s->bottom &&
1003         ((s->bottom_end <= s->bottom_start) ||
1004          (RECT_LEFT(*monitor_area) < s->bottom_end &&
1005           RECT_RIGHT(*monitor_area) > s->bottom_start)))
1006         ret->bottom = MAX(ret->bottom, edge);
1007 }
1008
1009 void screen_update_areas()
1010 {
1011     guint i, x;
1012     gulong *dims;
1013     GList *it;
1014     gint o;
1015
1016     g_free(monitor_area);
1017     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
1018
1019     if (area) {
1020         for (i = 0; area[i]; ++i)
1021             g_free(area[i]);
1022         g_free(area);
1023     }
1024
1025     area = g_new(Rect*, screen_num_desktops + 2);
1026     for (i = 0; i < screen_num_desktops + 1; ++i)
1027         area[i] = g_new0(Rect, screen_num_monitors + 1);
1028     area[i] = NULL;
1029
1030     dims = g_new(gulong, 4 * screen_num_desktops);
1031
1032     for (i = 0; i < screen_num_desktops + 1; ++i) {
1033         Strut *struts;
1034         gint l, r, t, b;
1035
1036         struts = g_new0(Strut, screen_num_monitors);
1037
1038         /* calc the xinerama areas */
1039         for (x = 0; x < screen_num_monitors; ++x) {
1040             area[i][x] = monitor_area[x];
1041             if (x == 0) {
1042                 l = monitor_area[x].x;
1043                 t = monitor_area[x].y;
1044                 r = monitor_area[x].x + monitor_area[x].width - 1;
1045                 b = monitor_area[x].y + monitor_area[x].height - 1;
1046             } else {
1047                 l = MIN(l, monitor_area[x].x);
1048                 t = MIN(t, monitor_area[x].y);
1049                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
1050                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
1051             }
1052         }
1053         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
1054
1055         /* apply the struts */
1056
1057         /* find the left-most xin heads, i do this in 2 loops :| */
1058         o = area[i][0].x;
1059         for (x = 1; x < screen_num_monitors; ++x)
1060             o = MIN(o, area[i][x].x);
1061
1062         for (x = 0; x < screen_num_monitors; ++x) {
1063             for (it = client_list; it; it = g_list_next(it)) {
1064                 ObClient *c = it->data;
1065                 screen_area_add_strut_left(&c->strut,
1066                                            &monitor_area[x],
1067                                            o + c->strut.left - area[i][x].x,
1068                                            &struts[x]);
1069             }
1070             screen_area_add_strut_left(&dock_strut,
1071                                        &monitor_area[x],
1072                                        o + dock_strut.left - area[i][x].x,
1073                                        &struts[x]);
1074
1075             area[i][x].x += struts[x].left;
1076             area[i][x].width -= struts[x].left;
1077         }
1078
1079         /* find the top-most xin heads, i do this in 2 loops :| */
1080         o = area[i][0].y;
1081         for (x = 1; x < screen_num_monitors; ++x)
1082             o = MIN(o, area[i][x].y);
1083
1084         for (x = 0; x < screen_num_monitors; ++x) {
1085             for (it = client_list; it; it = g_list_next(it)) {
1086                 ObClient *c = it->data;
1087                 screen_area_add_strut_top(&c->strut,
1088                                            &monitor_area[x],
1089                                            o + c->strut.top - area[i][x].y,
1090                                            &struts[x]);
1091             }
1092             screen_area_add_strut_top(&dock_strut,
1093                                       &monitor_area[x],
1094                                       o + dock_strut.top - area[i][x].y,
1095                                       &struts[x]);
1096
1097             area[i][x].y += struts[x].top;
1098             area[i][x].height -= struts[x].top;
1099         }
1100
1101         /* find the right-most xin heads, i do this in 2 loops :| */
1102         o = area[i][0].x + area[i][0].width - 1;
1103         for (x = 1; x < screen_num_monitors; ++x)
1104             o = MAX(o, area[i][x].x + area[i][x].width - 1);
1105
1106         for (x = 0; x < screen_num_monitors; ++x) {
1107             for (it = client_list; it; it = g_list_next(it)) {
1108                 ObClient *c = it->data;
1109                 screen_area_add_strut_right(&c->strut,
1110                                            &monitor_area[x],
1111                                            (area[i][x].x +
1112                                             area[i][x].width - 1) -
1113                                             (o - c->strut.right),
1114                                             &struts[x]);
1115             }
1116             screen_area_add_strut_right(&dock_strut,
1117                                         &monitor_area[x],
1118                                         (area[i][x].x +
1119                                          area[i][x].width - 1) -
1120                                         (o - dock_strut.right),
1121                                         &struts[x]);
1122
1123             area[i][x].width -= struts[x].right;
1124         }
1125
1126         /* find the bottom-most xin heads, i do this in 2 loops :| */
1127         o = area[i][0].y + area[i][0].height - 1;
1128         for (x = 1; x < screen_num_monitors; ++x)
1129             o = MAX(o, area[i][x].y + area[i][x].height - 1);
1130
1131         for (x = 0; x < screen_num_monitors; ++x) {
1132             for (it = client_list; it; it = g_list_next(it)) {
1133                 ObClient *c = it->data;
1134                 screen_area_add_strut_bottom(&c->strut,
1135                                              &monitor_area[x],
1136                                              (area[i][x].y +
1137                                               area[i][x].height - 1) - \
1138                                              (o - c->strut.bottom),
1139                                              &struts[x]);
1140             }
1141             screen_area_add_strut_bottom(&dock_strut,
1142                                          &monitor_area[x],
1143                                          (area[i][x].y +
1144                                           area[i][x].height - 1) - \
1145                                          (o - dock_strut.bottom),
1146                                          &struts[x]);
1147
1148             area[i][x].height -= struts[x].bottom;
1149         }
1150
1151         l = RECT_LEFT(area[i][0]);
1152         t = RECT_TOP(area[i][0]);
1153         r = RECT_RIGHT(area[i][0]);
1154         b = RECT_BOTTOM(area[i][0]);
1155         for (x = 1; x < screen_num_monitors; ++x) {
1156             l = MIN(l, RECT_LEFT(area[i][x]));
1157             t = MIN(l, RECT_TOP(area[i][x]));
1158             r = MAX(r, RECT_RIGHT(area[i][x]));
1159             b = MAX(b, RECT_BOTTOM(area[i][x]));
1160         }
1161         RECT_SET(area[i][screen_num_monitors], l, t,
1162                  r - l + 1, b - t + 1);
1163
1164         /* XXX optimize when this is run? */
1165
1166         /* the area has changed, adjust all the maximized
1167            windows */
1168         for (it = client_list; it; it = g_list_next(it)) {
1169             ObClient *c = it->data;
1170             if (i < screen_num_desktops) {
1171                 if (c->desktop == i)
1172                     client_reconfigure(c);
1173             } else if (c->desktop == DESKTOP_ALL)
1174                 client_reconfigure(c);
1175         }
1176         if (i < screen_num_desktops) {
1177             /* don't set these for the 'all desktops' area */
1178             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1179             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1180             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1181             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1182         }
1183
1184         g_free(struts);
1185     }
1186
1187     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1188                 dims, 4 * screen_num_desktops);
1189
1190     g_free(dims);
1191 }
1192
1193 Rect *screen_area(guint desktop)
1194 {
1195     return screen_area_monitor(desktop, screen_num_monitors);
1196 }
1197
1198 Rect *screen_area_monitor(guint desktop, guint head)
1199 {
1200     if (head > screen_num_monitors)
1201         return NULL;
1202     if (desktop >= screen_num_desktops) {
1203         if (desktop == DESKTOP_ALL)
1204             return &area[screen_num_desktops][head];
1205         return NULL;
1206     }
1207     return &area[desktop][head];
1208 }
1209
1210 guint screen_find_monitor(Rect *search)
1211 {
1212     guint i;
1213     guint most = 0;
1214     guint mostv = 0;
1215
1216     for (i = 0; i < screen_num_monitors; ++i) {
1217         Rect *area = screen_physical_area_monitor(i);
1218         if (RECT_INTERSECTS_RECT(*area, *search)) {
1219             Rect r;
1220             guint v;
1221
1222             RECT_SET_INTERSECTION(r, *area, *search);
1223             v = r.width * r.height;
1224
1225             if (v > mostv) {
1226                 mostv = v;
1227                 most = i;
1228             }
1229         }
1230     }
1231     return most;
1232 }
1233
1234 Rect *screen_physical_area()
1235 {
1236     return screen_physical_area_monitor(screen_num_monitors);
1237 }
1238
1239 Rect *screen_physical_area_monitor(guint head)
1240 {
1241     if (head > screen_num_monitors)
1242         return NULL;
1243     return &monitor_area[head];
1244 }
1245
1246 void screen_set_root_cursor()
1247 {
1248     if (sn_app_starting())
1249         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1250                       ob_cursor(OB_CURSOR_BUSY));
1251     else
1252         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1253                       ob_cursor(OB_CURSOR_POINTER));
1254 }
1255
1256 gboolean screen_pointer_pos(gint *x, gint *y)
1257 {
1258     Window w;
1259     gint i;
1260     guint u;
1261
1262     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1263                            &w, &w, x, y, &i, &i, &u);
1264 }