openbox/screen.c

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