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     guint i, numnames;
 303     gchar **names;
 304     GSList *it;
 305     guint32 d;
 306
 307     desktop_cycle_popup = pager_popup_new(FALSE);
 308     pager_popup_height(desktop_cycle_popup, POPUP_HEIGHT);
 309
 310     if (reconfig)
 311         return;
 312
 313     /* get the initial size */
 314     screen_resize();
 315
 316     /* get the desktop names */
 317     numnames = g_slist_length(config_desktops_names);
 318     names = g_new(gchar*, numnames + 1);
 319     names[numnames] = NULL;
 320     for (i = 0, it = config_desktops_names; it; ++i, it = g_slist_next(it))
 321         names[i] = g_strdup(it->data);
 322
 323     /* set the root window property */
 324     PROP_SETSS(RootWindow(ob_display, ob_screen), net_desktop_names,names);
 325
 326     g_strfreev(names);
 327
 328     /* set the number of desktops */
 329     screen_num_desktops = 0;
 330     screen_set_num_desktops(config_desktops_num);
 331
 332     /* start on the current desktop when a wm was already running */
 333     if (PROP_GET32(RootWindow(ob_display, ob_screen),
 334                    net_current_desktop, cardinal, &d) &&
 335         d < screen_num_desktops)
 336     {
 337         screen_set_desktop(d, FALSE);
 338     } else if (session_desktop >= 0)
 339         screen_set_desktop(MIN((guint)session_desktop,
 340                                screen_num_desktops), FALSE);
 341     else
 342         screen_set_desktop(MIN(config_screen_firstdesk,
 343                                screen_num_desktops) - 1, FALSE);
 344
 345     /* don't start in showing-desktop mode */
 346     screen_showing_desktop = FALSE;
 347     PROP_SET32(RootWindow(ob_display, ob_screen),
 348                net_showing_desktop, cardinal, screen_showing_desktop);
 349
 350     screen_update_layout();
 351 }
 352
 353 void screen_shutdown(gboolean reconfig)
 354 {
 355     Rect **r;
 356
 357     pager_popup_free(desktop_cycle_popup);
 358
 359     if (reconfig)
 360         return;
 361
 362     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 363                  NoEventMask);
 364
 365     /* we're not running here no more! */
 366     PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 367     /* not without us */
 368     PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 369     /* don't keep this mode */
 370     PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 371
 372     XDestroyWindow(ob_display, screen_support_win);
 373
 374     g_strfreev(screen_desktop_names);
 375     screen_desktop_names = NULL;
 376
 377     for (r = area; *r; ++r)
 378         g_free(*r);
 379     g_free(area);
 380     area = NULL;
 381 }
 382
 383 void screen_resize()
 384 {
 385     static gint oldw = 0, oldh = 0;
 386     gint w, h;
 387     GList *it;
 388     gulong geometry[2];
 389
 390     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 391     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 392
 393     if (w == oldw && h == oldh) return;
 394
 395     oldw = w; oldh = h;
 396
 397     /* Set the _NET_DESKTOP_GEOMETRY hint */
 398     screen_physical_size.width = geometry[0] = w;
 399     screen_physical_size.height = geometry[1] = h;
 400     PROP_SETA32(RootWindow(ob_display, ob_screen),
 401                 net_desktop_geometry, cardinal, geometry, 2);
 402
 403     if (ob_state() == OB_STATE_STARTING)
 404         return;
 405
 406     screen_update_areas();
 407     dock_configure();
 408
 409     for (it = client_list; it; it = g_list_next(it))
 410         client_move_onscreen(it->data, FALSE);
 411 }
 412
 413 void screen_set_num_desktops(guint num)
 414 {
 415     guint old;
 416     gulong *viewport;
 417     GList *it;
 418
 419     g_assert(num > 0);
 420
 421     if (screen_num_desktops == num) return;
 422
 423     old = screen_num_desktops;
 424     screen_num_desktops = num;
 425     PROP_SET32(RootWindow(ob_display, ob_screen),
 426                net_number_of_desktops, cardinal, num);
 427
 428     /* set the viewport hint */
 429     viewport = g_new0(gulong, num * 2);
 430     PROP_SETA32(RootWindow(ob_display, ob_screen),
 431                 net_desktop_viewport, cardinal, viewport, num * 2);
 432     g_free(viewport);
 433
 434     /* the number of rows/columns will differ */
 435     screen_update_layout();
 436
 437     /* move windows on desktops that will no longer exist! */
 438     for (it = client_list; it; it = g_list_next(it)) {
 439         ObClient *c = it->data;
 440         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 441             client_set_desktop(c, num - 1, FALSE);
 442     }
 443
 444     /* change our struts/area to match (after moving windows) */
 445     screen_update_areas();
 446
 447     /* may be some unnamed desktops that we need to fill in with names
 448      (after updating the areas so the popup can resize) */
 449     screen_update_desktop_names();
 450
 451     /* change our desktop if we're on one that no longer exists! */
 452     if (screen_desktop >= screen_num_desktops)
 453         screen_set_desktop(num - 1, TRUE);
 454 }
 455
 456 void screen_set_desktop(guint num, gboolean dofocus)
 457 {
 458     ObClient *c;
 459     GList *it;
 460     guint old;
 461
 462     g_assert(num < screen_num_desktops);
 463
 464     old = screen_desktop;
 465     screen_desktop = num;
 466     PROP_SET32(RootWindow(ob_display, ob_screen),
 467                net_current_desktop, cardinal, num);
 468
 469     if (old == num) return;
 470
 471     screen_last_desktop = old;
 472
 473     ob_debug("Moving to desktop %d\n", num+1);
 474
 475     if (moveresize_client)
 476         client_set_desktop(moveresize_client, num, TRUE);
 477
 478     /* show windows before hiding the rest to lessen the enter/leave events */
 479
 480     /* show windows from top to bottom */
 481     for (it = stacking_list; it; it = g_list_next(it)) {
 482         if (WINDOW_IS_CLIENT(it->data)) {
 483             ObClient *c = it->data;
 484             client_show(c);
 485         }
 486     }
 487
 488     /* hide windows from bottom to top */
 489     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 490         if (WINDOW_IS_CLIENT(it->data)) {
 491             ObClient *c = it->data;
 492             client_hide(c);
 493         }
 494     }
 495
 496     /* have to try focus here because when you leave an empty desktop
 497        there is no focus out to watch for */
 498     if (dofocus && (c = focus_fallback_target(TRUE, focus_client))) {
 499         /* reduce flicker by hiliting now rather than waiting for the server
 500            FocusIn event */
 501         frame_adjust_focus(c->frame, TRUE);
 502         client_focus(c);
 503     }
 504
 505     event_ignore_queued_enters();
 506
 507     if (event_curtime != CurrentTime)
 508         screen_desktop_user_time = event_curtime;
 509 }
 510
 511 static void get_row_col(guint d, guint *r, guint *c)
 512 {
 513     switch (screen_desktop_layout.orientation) {
 514     case OB_ORIENTATION_HORZ:
 515         switch (screen_desktop_layout.start_corner) {
 516         case OB_CORNER_TOPLEFT:
 517             *r = d / screen_desktop_layout.columns;
 518             *c = d % screen_desktop_layout.columns;
 519             break;
 520         case OB_CORNER_BOTTOMLEFT:
 521             *r = screen_desktop_layout.rows - 1 -
 522                 d / screen_desktop_layout.columns;
 523             *c = d % screen_desktop_layout.columns;
 524             break;
 525         case OB_CORNER_TOPRIGHT:
 526             *r = d / screen_desktop_layout.columns;
 527             *c = screen_desktop_layout.columns - 1 -
 528                 d % screen_desktop_layout.columns;
 529             break;
 530         case OB_CORNER_BOTTOMRIGHT:
 531             *r = screen_desktop_layout.rows - 1 -
 532                 d / screen_desktop_layout.columns;
 533             *c = screen_desktop_layout.columns - 1 -
 534                 d % screen_desktop_layout.columns;
 535             break;
 536         }
 537         break;
 538     case OB_ORIENTATION_VERT:
 539         switch (screen_desktop_layout.start_corner) {
 540         case OB_CORNER_TOPLEFT:
 541             *r = d % screen_desktop_layout.rows;
 542             *c = d / screen_desktop_layout.rows;
 543             break;
 544         case OB_CORNER_BOTTOMLEFT:
 545             *r = screen_desktop_layout.rows - 1 -
 546                 d % screen_desktop_layout.rows;
 547             *c = d / screen_desktop_layout.rows;
 548             break;
 549         case OB_CORNER_TOPRIGHT:
 550             *r = d % screen_desktop_layout.rows;
 551             *c = screen_desktop_layout.columns - 1 -
 552                 d / screen_desktop_layout.rows;
 553             break;
 554         case OB_CORNER_BOTTOMRIGHT:
 555             *r = screen_desktop_layout.rows - 1 -
 556                 d % screen_desktop_layout.rows;
 557             *c = screen_desktop_layout.columns - 1 -
 558                 d / screen_desktop_layout.rows;
 559             break;
 560         }
 561         break;
 562     }
 563 }
 564
 565 static guint translate_row_col(guint r, guint c)
 566 {
 567     switch (screen_desktop_layout.orientation) {
 568     case OB_ORIENTATION_HORZ:
 569         switch (screen_desktop_layout.start_corner) {
 570         case OB_CORNER_TOPLEFT:
 571             return r % screen_desktop_layout.rows *
 572                 screen_desktop_layout.columns +
 573                 c % screen_desktop_layout.columns;
 574         case OB_CORNER_BOTTOMLEFT:
 575             return (screen_desktop_layout.rows - 1 -
 576                     r % screen_desktop_layout.rows) *
 577                 screen_desktop_layout.columns +
 578                 c % screen_desktop_layout.columns;
 579         case OB_CORNER_TOPRIGHT:
 580             return r % screen_desktop_layout.rows *
 581                 screen_desktop_layout.columns +
 582                 (screen_desktop_layout.columns - 1 -
 583                  c % screen_desktop_layout.columns);
 584         case OB_CORNER_BOTTOMRIGHT:
 585             return (screen_desktop_layout.rows - 1 -
 586                     r % screen_desktop_layout.rows) *
 587                 screen_desktop_layout.columns +
 588                 (screen_desktop_layout.columns - 1 -
 589                  c % screen_desktop_layout.columns);
 590         }
 591     case OB_ORIENTATION_VERT:
 592         switch (screen_desktop_layout.start_corner) {
 593         case OB_CORNER_TOPLEFT:
 594             return c % screen_desktop_layout.columns *
 595                 screen_desktop_layout.rows +
 596                 r % screen_desktop_layout.rows;
 597         case OB_CORNER_BOTTOMLEFT:
 598             return c % screen_desktop_layout.columns *
 599                 screen_desktop_layout.rows +
 600                 (screen_desktop_layout.rows - 1 -
 601                  r % screen_desktop_layout.rows);
 602         case OB_CORNER_TOPRIGHT:
 603             return (screen_desktop_layout.columns - 1 -
 604                     c % screen_desktop_layout.columns) *
 605                 screen_desktop_layout.rows +
 606                 r % screen_desktop_layout.rows;
 607         case OB_CORNER_BOTTOMRIGHT:
 608             return (screen_desktop_layout.columns - 1 -
 609                     c % screen_desktop_layout.columns) *
 610                 screen_desktop_layout.rows +
 611                 (screen_desktop_layout.rows - 1 -
 612                  r % screen_desktop_layout.rows);
 613         }
 614     }
 615     g_assert_not_reached();
 616     return 0;
 617 }
 618
 619 void screen_desktop_popup(guint d, gboolean show)
 620 {
 621     Rect *a;
 622
 623     if (!show) {
 624         pager_popup_hide(desktop_cycle_popup);
 625     } else {
 626         a = screen_physical_area_monitor(0);
 627         pager_popup_position(desktop_cycle_popup, CenterGravity,
 628                              a->x + a->width / 2, a->y + a->height / 2);
 629         pager_popup_max_width(desktop_cycle_popup,
 630                               MAX(a->width/3, POPUP_WIDTH));
 631         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
 632     }
 633 }
 634
 635 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 636                            gboolean dialog, gboolean done, gboolean cancel)
 637 {
 638     static gboolean first = TRUE;
 639     static guint origd, d;
 640     guint r, c;
 641
 642     if (cancel) {
 643         d = origd;
 644         goto done_cycle;
 645     } else if (done && dialog) {
 646         goto done_cycle;
 647     }
 648     if (first) {
 649         first = FALSE;
 650         d = origd = screen_desktop;
 651     }
 652
 653     get_row_col(d, &r, &c);
 654
 655     if (linear) {
 656         switch (dir) {
 657         case OB_DIRECTION_EAST:
 658             if (d < screen_num_desktops - 1)
 659                 ++d;
 660             else if (wrap)
 661                 d = 0;
 662             break;
 663         case OB_DIRECTION_WEST:
 664             if (d > 0)
 665                 --d;
 666             else if (wrap)
 667                 d = screen_num_desktops - 1;
 668             break;
 669         default:
 670             assert(0);
 671             return screen_desktop;
 672         }
 673     } else {
 674         switch (dir) {
 675         case OB_DIRECTION_EAST:
 676             ++c;
 677             if (c >= screen_desktop_layout.columns) {
 678                 if (wrap) {
 679                     c = 0;
 680                 } else {
 681                     d = screen_desktop;
 682                     goto show_cycle_dialog;
 683                 }
 684             }
 685             d = translate_row_col(r, c);
 686             if (d >= screen_num_desktops) {
 687                 if (wrap) {
 688                     ++c;
 689                 } else {
 690                     d = screen_desktop;
 691                     goto show_cycle_dialog;
 692                 }
 693             }
 694             break;
 695         case OB_DIRECTION_WEST:
 696             --c;
 697             if (c >= screen_desktop_layout.columns) {
 698                 if (wrap) {
 699                     c = screen_desktop_layout.columns - 1;
 700                 } else {
 701                     d = screen_desktop;
 702                     goto show_cycle_dialog;
 703                 }
 704             }
 705             d = translate_row_col(r, c);
 706             if (d >= screen_num_desktops) {
 707                 if (wrap) {
 708                     --c;
 709                 } else {
 710                     d = screen_desktop;
 711                     goto show_cycle_dialog;
 712                 }
 713             }
 714             break;
 715         case OB_DIRECTION_SOUTH:
 716             ++r;
 717             if (r >= screen_desktop_layout.rows) {
 718                 if (wrap) {
 719                     r = 0;
 720                 } else {
 721                     d = screen_desktop;
 722                     goto show_cycle_dialog;
 723                 }
 724             }
 725             d = translate_row_col(r, c);
 726             if (d >= screen_num_desktops) {
 727                 if (wrap) {
 728                     ++r;
 729                 } else {
 730                     d = screen_desktop;
 731                     goto show_cycle_dialog;
 732                 }
 733             }
 734             break;
 735         case OB_DIRECTION_NORTH:
 736             --r;
 737             if (r >= screen_desktop_layout.rows) {
 738                 if (wrap) {
 739                     r = screen_desktop_layout.rows - 1;
 740                 } else {
 741                     d = screen_desktop;
 742                     goto show_cycle_dialog;
 743                 }
 744             }
 745             d = translate_row_col(r, c);
 746             if (d >= screen_num_desktops) {
 747                 if (wrap) {
 748                     --r;
 749                 } else {
 750                     d = screen_desktop;
 751                     goto show_cycle_dialog;
 752                 }
 753             }
 754             break;
 755         default:
 756             assert(0);
 757             return d = screen_desktop;
 758         }
 759
 760         d = translate_row_col(r, c);
 761     }
 762
 763 show_cycle_dialog:
 764     if (dialog) {
 765         screen_desktop_popup(d, TRUE);
 766         return d;
 767     }
 768
 769 done_cycle:
 770     first = TRUE;
 771
 772     screen_desktop_popup(0, FALSE);
 773
 774     return d;
 775 }
 776
 777 void screen_update_layout()
 778 {
 779     ObOrientation orient;
 780     ObCorner corner;
 781     guint rows;
 782     guint cols;
 783     guint32 *data;
 784     guint num;
 785     gboolean valid = FALSE;
 786
 787     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 788                     net_desktop_layout, cardinal, &data, &num)) {
 789         if (num == 3 || num == 4) {
 790
 791             if (data[0] == prop_atoms.net_wm_orientation_vert)
 792                 orient = OB_ORIENTATION_VERT;
 793             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 794                 orient = OB_ORIENTATION_HORZ;
 795             else
 796                 goto screen_update_layout_bail;
 797
 798             if (num < 4)
 799                 corner = OB_CORNER_TOPLEFT;
 800             else {
 801                 if (data[3] == prop_atoms.net_wm_topleft)
 802                     corner = OB_CORNER_TOPLEFT;
 803                 else if (data[3] == prop_atoms.net_wm_topright)
 804                     corner = OB_CORNER_TOPRIGHT;
 805                 else if (data[3] == prop_atoms.net_wm_bottomright)
 806                     corner = OB_CORNER_BOTTOMRIGHT;
 807                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 808                     corner = OB_CORNER_BOTTOMLEFT;
 809                 else
 810                     goto screen_update_layout_bail;
 811             }
 812
 813             cols = data[1];
 814             rows = data[2];
 815
 816             /* fill in a zero rows/columns */
 817             if ((cols == 0 && rows == 0)) { /* both 0's is bad data.. */
 818                 goto screen_update_layout_bail;
 819             } else {
 820                 if (cols == 0) {
 821                     cols = screen_num_desktops / rows;
 822                     if (rows * cols < screen_num_desktops)
 823                         cols++;
 824                     if (rows * cols >= screen_num_desktops + cols)
 825                         rows--;
 826                 } else if (rows == 0) {
 827                     rows = screen_num_desktops / cols;
 828                     if (cols * rows < screen_num_desktops)
 829                         rows++;
 830                     if (cols * rows >= screen_num_desktops + rows)
 831                         cols--;
 832                 }
 833             }
 834
 835             /* bounds checking */
 836             if (orient == OB_ORIENTATION_HORZ) {
 837                 cols = MIN(screen_num_desktops, cols);
 838                 rows = MIN(rows, (screen_num_desktops + cols - 1) / cols);
 839                 cols = screen_num_desktops / rows +
 840                     !!(screen_num_desktops % rows);
 841             } else {
 842                 rows = MIN(screen_num_desktops, rows);
 843                 cols = MIN(cols, (screen_num_desktops + rows - 1) / rows);
 844                 rows = screen_num_desktops / cols +
 845                     !!(screen_num_desktops % cols);
 846             }
 847
 848             valid = TRUE;
 849         }
 850     screen_update_layout_bail:
 851         g_free(data);
 852     }
 853
 854     if (!valid) {
 855         /* defaults */
 856         orient = OB_ORIENTATION_HORZ;
 857         corner = OB_CORNER_TOPLEFT;
 858         rows = 1;
 859         cols = screen_num_desktops;
 860     }
 861
 862     screen_desktop_layout.orientation = orient;
 863     screen_desktop_layout.start_corner = corner;
 864     screen_desktop_layout.rows = rows;
 865     screen_desktop_layout.columns = cols;
 866 }
 867
 868 void screen_update_desktop_names()
 869 {
 870     guint i;
 871
 872     /* empty the array */
 873     g_strfreev(screen_desktop_names);
 874     screen_desktop_names = NULL;
 875
 876     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 877                    net_desktop_names, utf8, &screen_desktop_names))
 878         for (i = 0; screen_desktop_names[i] && i < screen_num_desktops; ++i);
 879     else
 880         i = 0;
 881     if (i < screen_num_desktops) {
 882         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
 883                                        screen_num_desktops + 1);
 884         screen_desktop_names[screen_num_desktops] = NULL;
 885         for (; i < screen_num_desktops; ++i)
 886             screen_desktop_names[i] = g_strdup_printf("desktop %i", i + 1);
 887     }
 888
 889     /* resize the pager for these names */
 890     pager_popup_text_width_to_strings(desktop_cycle_popup,
 891                                       screen_desktop_names,
 892                                       screen_num_desktops);
 893 }
 894
 895 void screen_show_desktop(gboolean show, gboolean restore_focus)
 896 {
 897     GList *it;
 898
 899     if (show == screen_showing_desktop) return; /* no change */
 900
 901     screen_showing_desktop = show;
 902
 903     if (show) {
 904         /* bottom to top */
 905         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 906             if (WINDOW_IS_CLIENT(it->data)) {
 907                 ObClient *client = it->data;
 908                 client_showhide(client);
 909             }
 910         }
 911     } else {
 912         /* top to bottom */
 913         for (it = stacking_list; it; it = g_list_next(it)) {
 914             if (WINDOW_IS_CLIENT(it->data)) {
 915                 ObClient *client = it->data;
 916                 client_showhide(client);
 917             }
 918         }
 919     }
 920
 921     if (show) {
 922         /* focus desktop */
 923         for (it = focus_order; it; it = g_list_next(it)) {
 924             ObClient *c = it->data;
 925             if (c->type == OB_CLIENT_TYPE_DESKTOP &&
 926                 (c->desktop == screen_desktop || c->desktop == DESKTOP_ALL) &&
 927                 client_focus(it->data))
 928                 break;
 929         }
 930     } else if (restore_focus) {
 931         ObClient *c;
 932
 933         /* use NULL for the "old" argument because the desktop was focused
 934            and we don't want to fallback to the desktop by default */
 935         if ((c = focus_fallback_target(TRUE, NULL)))
 936             client_focus(c);
 937     }
 938
 939     show = !!show; /* make it boolean */
 940     PROP_SET32(RootWindow(ob_display, ob_screen),
 941                net_showing_desktop, cardinal, show);
 942 }
 943
 944 void screen_install_colormap(ObClient *client, gboolean install)
 945 {
 946     if (client == NULL) {
 947         if (install)
 948             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 949         else
 950             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 951     } else {
 952         xerror_set_ignore(TRUE);
 953         if (install) {
 954             if (client->colormap != None)
 955                 XInstallColormap(RrDisplay(ob_rr_inst), client->colormap);
 956         } else
 957             XUninstallColormap(RrDisplay(ob_rr_inst), client->colormap);
 958         xerror_set_ignore(FALSE);
 959     }
 960 }
 961
 962 static inline void
 963 screen_area_add_strut_left(const StrutPartial *s, const Rect *monitor_area,
 964                            gint edge, Strut *ret)
 965 {
 966     if (s->left &&
 967         ((s->left_end <= s->left_start) ||
 968          (RECT_TOP(*monitor_area) < s->left_end &&
 969           RECT_BOTTOM(*monitor_area) > s->left_start)))
 970         ret->left = MAX(ret->left, edge);
 971 }
 972
 973 static inline void
 974 screen_area_add_strut_top(const StrutPartial *s, const Rect *monitor_area,
 975                           gint edge, Strut *ret)
 976 {
 977     if (s->top &&
 978         ((s->top_end <= s->top_start) ||
 979          (RECT_LEFT(*monitor_area) < s->top_end &&
 980           RECT_RIGHT(*monitor_area) > s->top_start)))
 981         ret->top = MAX(ret->top, edge);
 982 }
 983
 984 static inline void
 985 screen_area_add_strut_right(const StrutPartial *s, const Rect *monitor_area,
 986                             gint edge, Strut *ret)
 987 {
 988     if (s->right &&
 989         ((s->right_end <= s->right_start) ||
 990          (RECT_TOP(*monitor_area) < s->right_end &&
 991           RECT_BOTTOM(*monitor_area) > s->right_start)))
 992         ret->right = MAX(ret->right, edge);
 993 }
 994
 995 static inline void
 996 screen_area_add_strut_bottom(const StrutPartial *s, const Rect *monitor_area,
 997                              gint edge, Strut *ret)
 998 {
 999     if (s->bottom &&
1000         ((s->bottom_end <= s->bottom_start) ||
1001          (RECT_LEFT(*monitor_area) < s->bottom_end &&
1002           RECT_RIGHT(*monitor_area) > s->bottom_start)))
1003         ret->bottom = MAX(ret->bottom, edge);
1004 }
1005
1006 void screen_update_areas()
1007 {
1008     guint i, x;
1009     gulong *dims;
1010     GList *it;
1011     gint o;
1012
1013     g_free(monitor_area);
1014     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
1015
1016     if (area) {
1017         for (i = 0; area[i]; ++i)
1018             g_free(area[i]);
1019         g_free(area);
1020     }
1021
1022     area = g_new(Rect*, screen_num_desktops + 2);
1023     for (i = 0; i < screen_num_desktops + 1; ++i)
1024         area[i] = g_new0(Rect, screen_num_monitors + 1);
1025     area[i] = NULL;
1026
1027     dims = g_new(gulong, 4 * screen_num_desktops);
1028
1029     for (i = 0; i < screen_num_desktops + 1; ++i) {
1030         Strut *struts;
1031         gint l, r, t, b;
1032
1033         struts = g_new0(Strut, screen_num_monitors);
1034
1035         /* calc the xinerama areas */
1036         for (x = 0; x < screen_num_monitors; ++x) {
1037             area[i][x] = monitor_area[x];
1038             if (x == 0) {
1039                 l = monitor_area[x].x;
1040                 t = monitor_area[x].y;
1041                 r = monitor_area[x].x + monitor_area[x].width - 1;
1042                 b = monitor_area[x].y + monitor_area[x].height - 1;
1043             } else {
1044                 l = MIN(l, monitor_area[x].x);
1045                 t = MIN(t, monitor_area[x].y);
1046                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
1047                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
1048             }
1049         }
1050         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
1051
1052         /* apply the struts */
1053
1054         /* find the left-most xin heads, i do this in 2 loops :| */
1055         o = area[i][0].x;
1056         for (x = 1; x < screen_num_monitors; ++x)
1057             o = MIN(o, area[i][x].x);
1058
1059         for (x = 0; x < screen_num_monitors; ++x) {
1060             for (it = client_list; it; it = g_list_next(it)) {
1061                 ObClient *c = it->data;
1062                 screen_area_add_strut_left(&c->strut,
1063                                            &monitor_area[x],
1064                                            o + c->strut.left - area[i][x].x,
1065                                            &struts[x]);
1066             }
1067             screen_area_add_strut_left(&dock_strut,
1068                                        &monitor_area[x],
1069                                        o + dock_strut.left - area[i][x].x,
1070                                        &struts[x]);
1071
1072             area[i][x].x += struts[x].left;
1073             area[i][x].width -= struts[x].left;
1074         }
1075
1076         /* find the top-most xin heads, i do this in 2 loops :| */
1077         o = area[i][0].y;
1078         for (x = 1; x < screen_num_monitors; ++x)
1079             o = MIN(o, area[i][x].y);
1080
1081         for (x = 0; x < screen_num_monitors; ++x) {
1082             for (it = client_list; it; it = g_list_next(it)) {
1083                 ObClient *c = it->data;
1084                 screen_area_add_strut_top(&c->strut,
1085                                            &monitor_area[x],
1086                                            o + c->strut.top - area[i][x].y,
1087                                            &struts[x]);
1088             }
1089             screen_area_add_strut_top(&dock_strut,
1090                                       &monitor_area[x],
1091                                       o + dock_strut.top - area[i][x].y,
1092                                       &struts[x]);
1093
1094             area[i][x].y += struts[x].top;
1095             area[i][x].height -= struts[x].top;
1096         }
1097
1098         /* find the right-most xin heads, i do this in 2 loops :| */
1099         o = area[i][0].x + area[i][0].width - 1;
1100         for (x = 1; x < screen_num_monitors; ++x)
1101             o = MAX(o, area[i][x].x + area[i][x].width - 1);
1102
1103         for (x = 0; x < screen_num_monitors; ++x) {
1104             for (it = client_list; it; it = g_list_next(it)) {
1105                 ObClient *c = it->data;
1106                 screen_area_add_strut_right(&c->strut,
1107                                            &monitor_area[x],
1108                                            (area[i][x].x +
1109                                             area[i][x].width - 1) -
1110                                             (o - c->strut.right),
1111                                             &struts[x]);
1112             }
1113             screen_area_add_strut_right(&dock_strut,
1114                                         &monitor_area[x],
1115                                         (area[i][x].x +
1116                                          area[i][x].width - 1) -
1117                                         (o - dock_strut.right),
1118                                         &struts[x]);
1119
1120             area[i][x].width -= struts[x].right;
1121         }
1122
1123         /* find the bottom-most xin heads, i do this in 2 loops :| */
1124         o = area[i][0].y + area[i][0].height - 1;
1125         for (x = 1; x < screen_num_monitors; ++x)
1126             o = MAX(o, area[i][x].y + area[i][x].height - 1);
1127
1128         for (x = 0; x < screen_num_monitors; ++x) {
1129             for (it = client_list; it; it = g_list_next(it)) {
1130                 ObClient *c = it->data;
1131                 screen_area_add_strut_bottom(&c->strut,
1132                                              &monitor_area[x],
1133                                              (area[i][x].y +
1134                                               area[i][x].height - 1) - \
1135                                              (o - c->strut.bottom),
1136                                              &struts[x]);
1137             }
1138             screen_area_add_strut_bottom(&dock_strut,
1139                                          &monitor_area[x],
1140                                          (area[i][x].y +
1141                                           area[i][x].height - 1) - \
1142                                          (o - dock_strut.bottom),
1143                                          &struts[x]);
1144
1145             area[i][x].height -= struts[x].bottom;
1146         }
1147
1148         l = RECT_LEFT(area[i][0]);
1149         t = RECT_TOP(area[i][0]);
1150         r = RECT_RIGHT(area[i][0]);
1151         b = RECT_BOTTOM(area[i][0]);
1152         for (x = 1; x < screen_num_monitors; ++x) {
1153             l = MIN(l, RECT_LEFT(area[i][x]));
1154             t = MIN(l, RECT_TOP(area[i][x]));
1155             r = MAX(r, RECT_RIGHT(area[i][x]));
1156             b = MAX(b, RECT_BOTTOM(area[i][x]));
1157         }
1158         RECT_SET(area[i][screen_num_monitors], l, t,
1159                  r - l + 1, b - t + 1);
1160
1161         /* XXX optimize when this is run? */
1162
1163         /* the area has changed, adjust all the maximized
1164            windows */
1165         for (it = client_list; it; it = g_list_next(it)) {
1166             ObClient *c = it->data;
1167             if (i < screen_num_desktops) {
1168                 if (c->desktop == i)
1169                     client_reconfigure(c);
1170             } else if (c->desktop == DESKTOP_ALL)
1171                 client_reconfigure(c);
1172         }
1173         if (i < screen_num_desktops) {
1174             /* don't set these for the 'all desktops' area */
1175             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1176             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1177             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1178             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1179         }
1180
1181         g_free(struts);
1182     }
1183
1184     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1185                 dims, 4 * screen_num_desktops);
1186
1187     g_free(dims);
1188 }
1189
1190 Rect *screen_area(guint desktop)
1191 {
1192     return screen_area_monitor(desktop, screen_num_monitors);
1193 }
1194
1195 Rect *screen_area_monitor(guint desktop, guint head)
1196 {
1197     if (head > screen_num_monitors)
1198         return NULL;
1199     if (desktop >= screen_num_desktops) {
1200         if (desktop == DESKTOP_ALL)
1201             return &area[screen_num_desktops][head];
1202         return NULL;
1203     }
1204     return &area[desktop][head];
1205 }
1206
1207 guint screen_find_monitor(Rect *search)
1208 {
1209     guint i;
1210     guint most = 0;
1211     guint mostv = 0;
1212
1213     for (i = 0; i < screen_num_monitors; ++i) {
1214         Rect *area = screen_physical_area_monitor(i);
1215         if (RECT_INTERSECTS_RECT(*area, *search)) {
1216             Rect r;
1217             guint v;
1218
1219             RECT_SET_INTERSECTION(r, *area, *search);
1220             v = r.width * r.height;
1221
1222             if (v > mostv) {
1223                 mostv = v;
1224                 most = i;
1225             }
1226         }
1227     }
1228     return most;
1229 }
1230
1231 Rect *screen_physical_area()
1232 {
1233     return screen_physical_area_monitor(screen_num_monitors);
1234 }
1235
1236 Rect *screen_physical_area_monitor(guint head)
1237 {
1238     if (head > screen_num_monitors)
1239         return NULL;
1240     return &monitor_area[head];
1241 }
1242
1243 void screen_set_root_cursor()
1244 {
1245     if (sn_app_starting())
1246         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1247                       ob_cursor(OB_CURSOR_BUSY));
1248     else
1249         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1250                       ob_cursor(OB_CURSOR_POINTER));
1251 }
1252
1253 gboolean screen_pointer_pos(gint *x, gint *y)
1254 {
1255     Window w;
1256     gint i;
1257     guint u;
1258
1259     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1260                            &w, &w, x, y, &i, &i, &u);
1261 }