openbox/screen.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    screen.c for the Openbox window manager
   4    Copyright (c) 2006        Mikael Magnusson
   5    Copyright (c) 2003-2007   Dana Jansens
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    See the COPYING file for a copy of the GNU General Public License.
  18 */
  19
  20 #include "debug.h"
  21 #include "openbox.h"
  22 #include "dock.h"
  23 #include "xerror.h"
  24 #include "prop.h"
  25 #include "grab.h"
  26 #include "startupnotify.h"
  27 #include "moveresize.h"
  28 #include "config.h"
  29 #include "screen.h"
  30 #include "client.h"
  31 #include "frame.h"
  32 #include "event.h"
  33 #include "focus.h"
  34 #include "popup.h"
  35 #include "extensions.h"
  36 #include "render/render.h"
  37
  38 #include <X11/Xlib.h>
  39 #ifdef HAVE_UNISTD_H
  40 #  include <sys/types.h>
  41 #  include <unistd.h>
  42 #endif
  43 #include <assert.h>
  44
  45 /*! The event mask to grab on the root window */
  46 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
  47                         EnterWindowMask | LeaveWindowMask | \
  48                         SubstructureRedirectMask | FocusChangeMask | \
  49                         ButtonPressMask | ButtonReleaseMask | ButtonMotionMask)
  50
  51 guint    screen_num_desktops;
  52 guint    screen_num_monitors;
  53 guint    screen_desktop;
  54 guint    screen_last_desktop;
  55 Size     screen_physical_size;
  56 gboolean screen_showing_desktop;
  57 DesktopLayout screen_desktop_layout;
  58 gchar  **screen_desktop_names;
  59 Window   screen_support_win;
  60
  61 static Rect  **area; /* array of desktop holding array of xinerama areas */
  62 static Rect  *monitor_area;
  63
  64 static ObPagerPopup *desktop_cycle_popup;
  65
  66 static gboolean replace_wm()
  67 {
  68     gchar *wm_sn;
  69     Atom wm_sn_atom;
  70     Window current_wm_sn_owner;
  71     Time timestamp;
  72
  73     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
  74     wm_sn_atom = XInternAtom(ob_display, wm_sn, FALSE);
  75     g_free(wm_sn);
  76
  77     current_wm_sn_owner = XGetSelectionOwner(ob_display, wm_sn_atom);
  78     if (current_wm_sn_owner == screen_support_win)
  79         current_wm_sn_owner = None;
  80     if (current_wm_sn_owner) {
  81         if (!ob_replace_wm) {
  82             g_warning("A window manager is already running on screen %d",
  83                       ob_screen);
  84             return FALSE;
  85         }
  86         xerror_set_ignore(TRUE);
  87         xerror_occured = FALSE;
  88
  89         /* We want to find out when the current selection owner dies */
  90         XSelectInput(ob_display, current_wm_sn_owner, StructureNotifyMask);
  91         XSync(ob_display, FALSE);
  92
  93         xerror_set_ignore(FALSE);
  94         if (xerror_occured)
  95             current_wm_sn_owner = None;
  96     }
  97
  98     {
  99         /* Generate a timestamp */
 100         XEvent event;
 101
 102         XSelectInput(ob_display, screen_support_win, PropertyChangeMask);
 103
 104         XChangeProperty(ob_display, screen_support_win,
 105                         prop_atoms.wm_class, prop_atoms.string,
 106                         8, PropModeAppend, NULL, 0);
 107         XWindowEvent(ob_display, screen_support_win,
 108                      PropertyChangeMask, &event);
 109
 110         XSelectInput(ob_display, screen_support_win, NoEventMask);
 111
 112         timestamp = event.xproperty.time;
 113     }
 114
 115     XSetSelectionOwner(ob_display, wm_sn_atom, screen_support_win,
 116                        timestamp);
 117
 118     if (XGetSelectionOwner(ob_display, wm_sn_atom) != screen_support_win) {
 119         g_warning("Could not acquire window manager selection on screen %d",
 120                   ob_screen);
 121         return FALSE;
 122     }
 123
 124     /* Wait for old window manager to go away */
 125     if (current_wm_sn_owner) {
 126       XEvent event;
 127       gulong wait = 0;
 128       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
 129
 130       while (wait < timeout) {
 131           if (XCheckWindowEvent(ob_display, current_wm_sn_owner,
 132                                 StructureNotifyMask, &event) &&
 133               event.type == DestroyNotify)
 134               break;
 135           g_usleep(G_USEC_PER_SEC / 10);
 136           wait += G_USEC_PER_SEC / 10;
 137       }
 138
 139       if (wait >= timeout) {
 140           g_warning("Timeout expired while waiting for the current WM to die "
 141                     "on screen %d", ob_screen);
 142           return FALSE;
 143       }
 144     }
 145
 146     /* Send client message indicating that we are now the WM */
 147     prop_message(RootWindow(ob_display, ob_screen), prop_atoms.manager,
 148                  timestamp, wm_sn_atom, 0, 0, SubstructureNotifyMask);
 149
 150
 151     return TRUE;
 152 }
 153
 154 gboolean screen_annex()
 155 {
 156     XSetWindowAttributes attrib;
 157     pid_t pid;
 158     gint i, num_support;
 159     gulong *supported;
 160
 161     /* create the netwm support window */
 162     attrib.override_redirect = TRUE;
 163     screen_support_win = XCreateWindow(ob_display,
 164                                        RootWindow(ob_display, ob_screen),
 165                                        -100, -100, 1, 1, 0,
 166                                        CopyFromParent, InputOutput,
 167                                        CopyFromParent,
 168                                        CWOverrideRedirect, &attrib);
 169     XMapWindow(ob_display, screen_support_win);
 170
 171     if (!replace_wm()) {
 172         XDestroyWindow(ob_display, screen_support_win);
 173         return FALSE;
 174     }
 175
 176     xerror_set_ignore(TRUE);
 177     xerror_occured = FALSE;
 178     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 179                  ROOT_EVENTMASK);
 180     xerror_set_ignore(FALSE);
 181     if (xerror_occured) {
 182         g_warning("A window manager is already running on screen %d",
 183                   ob_screen);
 184
 185         XDestroyWindow(ob_display, screen_support_win);
 186         return FALSE;
 187     }
 188
 189
 190     screen_set_root_cursor();
 191
 192     /* set the OPENBOX_PID hint */
 193     pid = getpid();
 194     PROP_SET32(RootWindow(ob_display, ob_screen),
 195                openbox_pid, cardinal, pid);
 196
 197     /* set supporting window */
 198     PROP_SET32(RootWindow(ob_display, ob_screen),
 199                net_supporting_wm_check, window, screen_support_win);
 200
 201     /* set properties on the supporting window */
 202     PROP_SETS(screen_support_win, net_wm_name, "Openbox");
 203     PROP_SET32(screen_support_win, net_supporting_wm_check,
 204                window, screen_support_win);
 205
 206     /* set the _NET_SUPPORTED_ATOMS hint */
 207     num_support = 55;
 208     i = 0;
 209     supported = g_new(gulong, num_support);
 210     supported[i++] = prop_atoms.net_wm_full_placement;
 211     supported[i++] = prop_atoms.net_current_desktop;
 212     supported[i++] = prop_atoms.net_number_of_desktops;
 213     supported[i++] = prop_atoms.net_desktop_geometry;
 214     supported[i++] = prop_atoms.net_desktop_viewport;
 215     supported[i++] = prop_atoms.net_active_window;
 216     supported[i++] = prop_atoms.net_workarea;
 217     supported[i++] = prop_atoms.net_client_list;
 218     supported[i++] = prop_atoms.net_client_list_stacking;
 219     supported[i++] = prop_atoms.net_desktop_names;
 220     supported[i++] = prop_atoms.net_close_window;
 221     supported[i++] = prop_atoms.net_desktop_layout;
 222     supported[i++] = prop_atoms.net_showing_desktop;
 223     supported[i++] = prop_atoms.net_wm_name;
 224     supported[i++] = prop_atoms.net_wm_visible_name;
 225     supported[i++] = prop_atoms.net_wm_icon_name;
 226     supported[i++] = prop_atoms.net_wm_visible_icon_name;
 227     supported[i++] = prop_atoms.net_wm_desktop;
 228     supported[i++] = prop_atoms.net_wm_strut;
 229     supported[i++] = prop_atoms.net_wm_window_type;
 230     supported[i++] = prop_atoms.net_wm_window_type_desktop;
 231     supported[i++] = prop_atoms.net_wm_window_type_dock;
 232     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
 233     supported[i++] = prop_atoms.net_wm_window_type_menu;
 234     supported[i++] = prop_atoms.net_wm_window_type_utility;
 235     supported[i++] = prop_atoms.net_wm_window_type_splash;
 236     supported[i++] = prop_atoms.net_wm_window_type_dialog;
 237     supported[i++] = prop_atoms.net_wm_window_type_normal;
 238     supported[i++] = prop_atoms.net_wm_allowed_actions;
 239     supported[i++] = prop_atoms.net_wm_action_move;
 240     supported[i++] = prop_atoms.net_wm_action_resize;
 241     supported[i++] = prop_atoms.net_wm_action_minimize;
 242     supported[i++] = prop_atoms.net_wm_action_shade;
 243     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
 244     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
 245     supported[i++] = prop_atoms.net_wm_action_fullscreen;
 246     supported[i++] = prop_atoms.net_wm_action_change_desktop;
 247     supported[i++] = prop_atoms.net_wm_action_close;
 248     supported[i++] = prop_atoms.net_wm_state;
 249     supported[i++] = prop_atoms.net_wm_state_modal;
 250     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
 251     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
 252     supported[i++] = prop_atoms.net_wm_state_shaded;
 253     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
 254     supported[i++] = prop_atoms.net_wm_state_skip_pager;
 255     supported[i++] = prop_atoms.net_wm_state_hidden;
 256     supported[i++] = prop_atoms.net_wm_state_fullscreen;
 257     supported[i++] = prop_atoms.net_wm_state_above;
 258     supported[i++] = prop_atoms.net_wm_state_below;
 259     supported[i++] = prop_atoms.net_wm_state_demands_attention;
 260     supported[i++] = prop_atoms.net_moveresize_window;
 261     supported[i++] = prop_atoms.net_wm_moveresize;
 262     supported[i++] = prop_atoms.net_wm_user_time;
 263     supported[i++] = prop_atoms.net_frame_extents;
 264     supported[i++] = prop_atoms.ob_wm_state_undecorated;
 265     g_assert(i == num_support);
 266 /*
 267   supported[] = prop_atoms.net_wm_action_stick;
 268 */
 269
 270     PROP_SETA32(RootWindow(ob_display, ob_screen),
 271                 net_supported, atom, supported, num_support);
 272     g_free(supported);
 273
 274     return TRUE;
 275 }
 276
 277 void screen_startup(gboolean reconfig)
 278 {
 279     GSList *it;
 280     guint i;
 281
 282     desktop_cycle_popup = pager_popup_new(FALSE);
 283
 284     if (!reconfig)
 285         /* get the initial size */
 286         screen_resize();
 287
 288     /* set the names */
 289     screen_desktop_names = g_new(gchar*,
 290                                  g_slist_length(config_desktops_names) + 1);
 291     for (i = 0, it = config_desktops_names; it; ++i, it = g_slist_next(it))
 292         screen_desktop_names[i] = it->data; /* dont strdup */
 293     screen_desktop_names[i] = NULL;
 294     PROP_SETSS(RootWindow(ob_display, ob_screen),
 295                net_desktop_names, screen_desktop_names);
 296     g_free(screen_desktop_names); /* dont free the individual strings */
 297     screen_desktop_names = NULL;
 298
 299     if (!reconfig)
 300         screen_num_desktops = 0;
 301     screen_set_num_desktops(config_desktops_num);
 302     if (!reconfig) {
 303         guint32 d;
 304         /* start on the current desktop when a wm was already running */
 305         if (PROP_GET32(RootWindow(ob_display, ob_screen),
 306                        net_current_desktop, cardinal, &d) &&
 307             d < screen_num_desktops)
 308         {
 309             screen_set_desktop(d);
 310         } else
 311             screen_set_desktop(MIN(config_screen_firstdesk,
 312                                    screen_num_desktops) - 1);
 313
 314         /* don't start in showing-desktop mode */
 315         screen_showing_desktop = FALSE;
 316         PROP_SET32(RootWindow(ob_display, ob_screen),
 317                    net_showing_desktop, cardinal, screen_showing_desktop);
 318
 319         screen_update_layout();
 320     }
 321 }
 322
 323 void screen_shutdown(gboolean reconfig)
 324 {
 325     Rect **r;
 326
 327     pager_popup_free(desktop_cycle_popup);
 328
 329     if (!reconfig) {
 330         XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 331                      NoEventMask);
 332
 333         /* we're not running here no more! */
 334         PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 335         /* not without us */
 336         PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 337         /* don't keep this mode */
 338         PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 339
 340         XDestroyWindow(ob_display, screen_support_win);
 341     }
 342
 343     g_strfreev(screen_desktop_names);
 344     screen_desktop_names = NULL;
 345     for (r = area; *r; ++r)
 346         g_free(*r);
 347     g_free(area);
 348     area = NULL;
 349 }
 350
 351 void screen_resize()
 352 {
 353     static gint oldw = 0, oldh = 0;
 354     gint w, h;
 355     GList *it;
 356     gulong geometry[2];
 357
 358     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 359     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 360
 361     if (w == oldw && h == oldh) return;
 362
 363     oldw = w; oldh = h;
 364
 365     /* Set the _NET_DESKTOP_GEOMETRY hint */
 366     screen_physical_size.width = geometry[0] = w;
 367     screen_physical_size.height = geometry[1] = h;
 368     PROP_SETA32(RootWindow(ob_display, ob_screen),
 369                 net_desktop_geometry, cardinal, geometry, 2);
 370
 371     if (ob_state() == OB_STATE_STARTING)
 372         return;
 373
 374     screen_update_areas();
 375     dock_configure();
 376
 377     for (it = client_list; it; it = g_list_next(it))
 378         client_move_onscreen(it->data, FALSE);
 379 }
 380
 381 void screen_set_num_desktops(guint num)
 382 {
 383     guint old;
 384     gulong *viewport;
 385     GList *it;
 386
 387     g_assert(num > 0);
 388
 389     if (screen_num_desktops == num) return;
 390
 391     old = screen_num_desktops;
 392     screen_num_desktops = num;
 393     PROP_SET32(RootWindow(ob_display, ob_screen),
 394                net_number_of_desktops, cardinal, num);
 395
 396     /* set the viewport hint */
 397     viewport = g_new0(gulong, num * 2);
 398     PROP_SETA32(RootWindow(ob_display, ob_screen),
 399                 net_desktop_viewport, cardinal, viewport, num * 2);
 400     g_free(viewport);
 401
 402     /* the number of rows/columns will differ */
 403     screen_update_layout();
 404
 405     /* may be some unnamed desktops that we need to fill in with names */
 406     screen_update_desktop_names();
 407
 408     /* move windows on desktops that will no longer exist! */
 409     for (it = client_list; it; it = g_list_next(it)) {
 410         ObClient *c = it->data;
 411         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 412             client_set_desktop(c, num - 1, FALSE);
 413     }
 414
 415     /* change our struts/area to match (after moving windows) */
 416     screen_update_areas();
 417
 418     /* change our desktop if we're on one that no longer exists! */
 419     if (screen_desktop >= screen_num_desktops)
 420         screen_set_desktop(num - 1);
 421 }
 422
 423 void screen_set_desktop(guint num)
 424 {
 425     GList *it;
 426     guint old;
 427
 428     g_assert(num < screen_num_desktops);
 429
 430     old = screen_desktop;
 431     screen_desktop = num;
 432     PROP_SET32(RootWindow(ob_display, ob_screen),
 433                net_current_desktop, cardinal, num);
 434
 435     if (old == num) return;
 436
 437     screen_last_desktop = old;
 438
 439     ob_debug("Moving to desktop %d\n", num+1);
 440
 441     if (moveresize_client)
 442         client_set_desktop(moveresize_client, num, TRUE);
 443
 444     /* show windows before hiding the rest to lessen the enter/leave events */
 445
 446     /* show/hide windows from top to bottom */
 447     for (it = stacking_list; it; it = g_list_next(it)) {
 448         if (WINDOW_IS_CLIENT(it->data)) {
 449             ObClient *c = it->data;
 450             client_show(c);
 451         }
 452     }
 453
 454     /* hide windows from bottom to top */
 455     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 456         if (WINDOW_IS_CLIENT(it->data)) {
 457             ObClient *c = it->data;
 458             client_hide(c);
 459         }
 460     }
 461
 462     focus_hilite = focus_fallback_target(TRUE, focus_client);
 463     if (focus_hilite) {
 464         frame_adjust_focus(focus_hilite->frame, TRUE);
 465
 466         /*!
 467           When this focus_client check is not used, you can end up with
 468           races, as demonstrated with gnome-panel, sometimes the window
 469           you click on another desktop ends up losing focus cuz of the
 470           focus change here.
 471         */
 472         /*if (!focus_client)*/
 473         client_focus(focus_hilite);
 474     }
 475
 476     event_ignore_queued_enters();
 477 }
 478
 479 static void get_row_col(guint d, guint *r, guint *c)
 480 {
 481     switch (screen_desktop_layout.orientation) {
 482     case OB_ORIENTATION_HORZ:
 483         switch (screen_desktop_layout.start_corner) {
 484         case OB_CORNER_TOPLEFT:
 485             *r = d / screen_desktop_layout.columns;
 486             *c = d % screen_desktop_layout.columns;
 487             break;
 488         case OB_CORNER_BOTTOMLEFT:
 489             *r = screen_desktop_layout.rows - 1 -
 490                 d / screen_desktop_layout.columns;
 491             *c = d % screen_desktop_layout.columns;
 492             break;
 493         case OB_CORNER_TOPRIGHT:
 494             *r = d / screen_desktop_layout.columns;
 495             *c = screen_desktop_layout.columns - 1 -
 496                 d % screen_desktop_layout.columns;
 497             break;
 498         case OB_CORNER_BOTTOMRIGHT:
 499             *r = screen_desktop_layout.rows - 1 -
 500                 d / screen_desktop_layout.columns;
 501             *c = screen_desktop_layout.columns - 1 -
 502                 d % screen_desktop_layout.columns;
 503             break;
 504         }
 505         break;
 506     case OB_ORIENTATION_VERT:
 507         switch (screen_desktop_layout.start_corner) {
 508         case OB_CORNER_TOPLEFT:
 509             *r = d % screen_desktop_layout.rows;
 510             *c = d / screen_desktop_layout.rows;
 511             break;
 512         case OB_CORNER_BOTTOMLEFT:
 513             *r = screen_desktop_layout.rows - 1 -
 514                 d % screen_desktop_layout.rows;
 515             *c = d / screen_desktop_layout.rows;
 516             break;
 517         case OB_CORNER_TOPRIGHT:
 518             *r = d % screen_desktop_layout.rows;
 519             *c = screen_desktop_layout.columns - 1 -
 520                 d / screen_desktop_layout.rows;
 521             break;
 522         case OB_CORNER_BOTTOMRIGHT:
 523             *r = screen_desktop_layout.rows - 1 -
 524                 d % screen_desktop_layout.rows;
 525             *c = screen_desktop_layout.columns - 1 -
 526                 d / screen_desktop_layout.rows;
 527             break;
 528         }
 529         break;
 530     }
 531 }
 532
 533 static guint translate_row_col(guint r, guint c)
 534 {
 535     switch (screen_desktop_layout.orientation) {
 536     case OB_ORIENTATION_HORZ:
 537         switch (screen_desktop_layout.start_corner) {
 538         case OB_CORNER_TOPLEFT:
 539             return r % screen_desktop_layout.rows *
 540                 screen_desktop_layout.columns +
 541                 c % screen_desktop_layout.columns;
 542         case OB_CORNER_BOTTOMLEFT:
 543             return (screen_desktop_layout.rows - 1 -
 544                     r % screen_desktop_layout.rows) *
 545                 screen_desktop_layout.columns +
 546                 c % screen_desktop_layout.columns;
 547         case OB_CORNER_TOPRIGHT:
 548             return r % screen_desktop_layout.rows *
 549                 screen_desktop_layout.columns +
 550                 (screen_desktop_layout.columns - 1 -
 551                  c % screen_desktop_layout.columns);
 552         case OB_CORNER_BOTTOMRIGHT:
 553             return (screen_desktop_layout.rows - 1 -
 554                     r % screen_desktop_layout.rows) *
 555                 screen_desktop_layout.columns +
 556                 (screen_desktop_layout.columns - 1 -
 557                  c % screen_desktop_layout.columns);
 558         }
 559     case OB_ORIENTATION_VERT:
 560         switch (screen_desktop_layout.start_corner) {
 561         case OB_CORNER_TOPLEFT:
 562             return c % screen_desktop_layout.columns *
 563                 screen_desktop_layout.rows +
 564                 r % screen_desktop_layout.rows;
 565         case OB_CORNER_BOTTOMLEFT:
 566             return c % screen_desktop_layout.columns *
 567                 screen_desktop_layout.rows +
 568                 (screen_desktop_layout.rows - 1 -
 569                  r % screen_desktop_layout.rows);
 570         case OB_CORNER_TOPRIGHT:
 571             return (screen_desktop_layout.columns - 1 -
 572                     c % screen_desktop_layout.columns) *
 573                 screen_desktop_layout.rows +
 574                 r % screen_desktop_layout.rows;
 575         case OB_CORNER_BOTTOMRIGHT:
 576             return (screen_desktop_layout.columns - 1 -
 577                     c % screen_desktop_layout.columns) *
 578                 screen_desktop_layout.rows +
 579                 (screen_desktop_layout.rows - 1 -
 580                  r % screen_desktop_layout.rows);
 581         }
 582     }
 583     g_assert_not_reached();
 584     return 0;
 585 }
 586
 587 void screen_desktop_popup(guint d, gboolean show)
 588 {
 589     Rect *a;
 590
 591     if (!show) {
 592         pager_popup_hide(desktop_cycle_popup);
 593     } else {
 594         a = screen_physical_area_monitor(0);
 595         pager_popup_position(desktop_cycle_popup, CenterGravity,
 596                              a->x + a->width / 2, a->y + a->height / 2);
 597         /* XXX the size and the font extents need to be related on some level
 598          */
 599         pager_popup_size(desktop_cycle_popup, POPUP_WIDTH, POPUP_HEIGHT);
 600
 601         pager_popup_set_text_align(desktop_cycle_popup, RR_JUSTIFY_CENTER);
 602
 603         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
 604     }
 605 }
 606
 607 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 608                            gboolean dialog, gboolean done, gboolean cancel)
 609 {
 610     static gboolean first = TRUE;
 611     static guint origd, d;
 612     guint r, c;
 613
 614     if (cancel) {
 615         d = origd;
 616         goto done_cycle;
 617     } else if (done && dialog) {
 618         goto done_cycle;
 619     }
 620     if (first) {
 621         first = FALSE;
 622         d = origd = screen_desktop;
 623     }
 624
 625     get_row_col(d, &r, &c);
 626
 627     if (linear) {
 628         switch (dir) {
 629         case OB_DIRECTION_EAST:
 630             if (d < screen_num_desktops - 1)
 631                 ++d;
 632             else if (wrap)
 633                 d = 0;
 634             break;
 635         case OB_DIRECTION_WEST:
 636             if (d > 0)
 637                 --d;
 638             else if (wrap)
 639                 d = screen_num_desktops - 1;
 640             break;
 641         default:
 642             assert(0);
 643             return screen_desktop;
 644         }
 645     } else {
 646         switch (dir) {
 647         case OB_DIRECTION_EAST:
 648             ++c;
 649             if (c >= screen_desktop_layout.columns) {
 650                 if (wrap) {
 651                     c = 0;
 652                 } else {
 653                     d = screen_desktop;
 654                     goto show_cycle_dialog;
 655                 }
 656             }
 657             d = translate_row_col(r, c);
 658             if (d >= screen_num_desktops) {
 659                 if (wrap) {
 660                     ++c;
 661                 } else {
 662                     d = screen_desktop;
 663                     goto show_cycle_dialog;
 664                 }
 665             }
 666             break;
 667         case OB_DIRECTION_WEST:
 668             --c;
 669             if (c >= screen_desktop_layout.columns) {
 670                 if (wrap) {
 671                     c = screen_desktop_layout.columns - 1;
 672                 } else {
 673                     d = screen_desktop;
 674                     goto show_cycle_dialog;
 675                 }
 676             }
 677             d = translate_row_col(r, c);
 678             if (d >= screen_num_desktops) {
 679                 if (wrap) {
 680                     --c;
 681                 } else {
 682                     d = screen_desktop;
 683                     goto show_cycle_dialog;
 684                 }
 685             }
 686             break;
 687         case OB_DIRECTION_SOUTH:
 688             ++r;
 689             if (r >= screen_desktop_layout.rows) {
 690                 if (wrap) {
 691                     r = 0;
 692                 } else {
 693                     d = screen_desktop;
 694                     goto show_cycle_dialog;
 695                 }
 696             }
 697             d = translate_row_col(r, c);
 698             if (d >= screen_num_desktops) {
 699                 if (wrap) {
 700                     ++r;
 701                 } else {
 702                     d = screen_desktop;
 703                     goto show_cycle_dialog;
 704                 }
 705             }
 706             break;
 707         case OB_DIRECTION_NORTH:
 708             --r;
 709             if (r >= screen_desktop_layout.rows) {
 710                 if (wrap) {
 711                     r = screen_desktop_layout.rows - 1;
 712                 } else {
 713                     d = screen_desktop;
 714                     goto show_cycle_dialog;
 715                 }
 716             }
 717             d = translate_row_col(r, c);
 718             if (d >= screen_num_desktops) {
 719                 if (wrap) {
 720                     --r;
 721                 } else {
 722                     d = screen_desktop;
 723                     goto show_cycle_dialog;
 724                 }
 725             }
 726             break;
 727         default:
 728             assert(0);
 729             return d = screen_desktop;
 730         }
 731
 732         d = translate_row_col(r, c);
 733     }
 734
 735 show_cycle_dialog:
 736     if (dialog) {
 737         screen_desktop_popup(d, TRUE);
 738         return d;
 739     }
 740
 741 done_cycle:
 742     first = TRUE;
 743
 744     screen_desktop_popup(0, FALSE);
 745
 746     return d;
 747 }
 748
 749 void screen_update_layout()
 750 {
 751     ObOrientation orient;
 752     ObCorner corner;
 753     guint rows;
 754     guint cols;
 755     guint32 *data;
 756     guint num;
 757     gboolean valid = FALSE;
 758
 759     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 760                     net_desktop_layout, cardinal, &data, &num)) {
 761         if (num == 3 || num == 4) {
 762
 763             if (data[0] == prop_atoms.net_wm_orientation_vert)
 764                 orient = OB_ORIENTATION_VERT;
 765             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 766                 orient = OB_ORIENTATION_HORZ;
 767             else
 768                 goto screen_update_layout_bail;
 769
 770             if (num < 4)
 771                 corner = OB_CORNER_TOPLEFT;
 772             else {
 773                 if (data[3] == prop_atoms.net_wm_topleft)
 774                     corner = OB_CORNER_TOPLEFT;
 775                 else if (data[3] == prop_atoms.net_wm_topright)
 776                     corner = OB_CORNER_TOPRIGHT;
 777                 else if (data[3] == prop_atoms.net_wm_bottomright)
 778                     corner = OB_CORNER_BOTTOMRIGHT;
 779                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 780                     corner = OB_CORNER_BOTTOMLEFT;
 781                 else
 782                     goto screen_update_layout_bail;
 783             }
 784
 785             cols = data[1];
 786             rows = data[2];
 787
 788             /* fill in a zero rows/columns */
 789             if ((cols == 0 && rows == 0)) { /* both 0's is bad data.. */
 790                 goto screen_update_layout_bail;
 791             } else {
 792                 if (cols == 0) {
 793                     cols = screen_num_desktops / rows;
 794                     if (rows * cols < screen_num_desktops)
 795                         cols++;
 796                     if (rows * cols >= screen_num_desktops + cols)
 797                         rows--;
 798                 } else if (rows == 0) {
 799                     rows = screen_num_desktops / cols;
 800                     if (cols * rows < screen_num_desktops)
 801                         rows++;
 802                     if (cols * rows >= screen_num_desktops + rows)
 803                         cols--;
 804                 }
 805             }
 806
 807             /* bounds checking */
 808             if (orient == OB_ORIENTATION_HORZ) {
 809                 cols = MIN(screen_num_desktops, cols);
 810                 rows = MIN(rows, (screen_num_desktops + cols - 1) / cols);
 811                 cols = screen_num_desktops / rows +
 812                     !!(screen_num_desktops % rows);
 813             } else {
 814                 rows = MIN(screen_num_desktops, rows);
 815                 cols = MIN(cols, (screen_num_desktops + rows - 1) / rows);
 816                 rows = screen_num_desktops / cols +
 817                     !!(screen_num_desktops % cols);
 818             }
 819
 820             valid = TRUE;
 821         }
 822     screen_update_layout_bail:
 823         g_free(data);
 824     }
 825
 826     if (!valid) {
 827         /* defaults */
 828         orient = OB_ORIENTATION_HORZ;
 829         corner = OB_CORNER_TOPLEFT;
 830         rows = 1;
 831         cols = screen_num_desktops;
 832     }
 833
 834     screen_desktop_layout.orientation = orient;
 835     screen_desktop_layout.start_corner = corner;
 836     screen_desktop_layout.rows = rows;
 837     screen_desktop_layout.columns = cols;
 838 }
 839
 840 void screen_update_desktop_names()
 841 {
 842     guint i;
 843
 844     /* empty the array */
 845     g_strfreev(screen_desktop_names);
 846     screen_desktop_names = NULL;
 847
 848     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 849                    net_desktop_names, utf8, &screen_desktop_names))
 850         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 851     else
 852         i = 0;
 853     if (i <= screen_num_desktops) {
 854         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
 855                                        screen_num_desktops + 1);
 856         screen_desktop_names[screen_num_desktops] = NULL;
 857         for (; i < screen_num_desktops; ++i)
 858             screen_desktop_names[i] = g_strdup_printf("Desktop %i", i + 1);
 859     }
 860 }
 861
 862 void screen_show_desktop(gboolean show)
 863 {
 864     GList *it;
 865
 866     if (show == screen_showing_desktop) return; /* no change */
 867
 868     screen_showing_desktop = show;
 869
 870     if (show) {
 871         /* bottom to top */
 872         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 873             if (WINDOW_IS_CLIENT(it->data)) {
 874                 ObClient *client = it->data;
 875                 client_showhide(client);
 876             }
 877         }
 878     } else {
 879         /* top to bottom */
 880         for (it = stacking_list; it; it = g_list_next(it)) {
 881             if (WINDOW_IS_CLIENT(it->data)) {
 882                 ObClient *client = it->data;
 883                 client_showhide(client);
 884             }
 885         }
 886     }
 887
 888     if (show) {
 889         /* focus desktop */
 890         for (it = focus_order; it; it = g_list_next(it)) {
 891             ObClient *c = it->data;
 892             if (c->type == OB_CLIENT_TYPE_DESKTOP &&
 893                 (c->desktop == screen_desktop || c->desktop == DESKTOP_ALL) &&
 894                 client_focus(it->data))
 895                 break;
 896         }
 897     } else {
 898         /* use NULL for the "old" argument because the desktop was focused
 899            and we don't want to fallback to the desktop by default */
 900         focus_hilite = focus_fallback_target(TRUE, NULL);
 901         if (focus_hilite) {
 902             frame_adjust_focus(focus_hilite->frame, TRUE);
 903
 904             /*!
 905               When this focus_client check is not used, you can end up with
 906               races, as demonstrated with gnome-panel, sometimes the window
 907               you click on another desktop ends up losing focus cuz of the
 908               focus change here.
 909             */
 910             /*if (!focus_client)*/
 911             client_focus(focus_hilite);
 912         }
 913     }
 914
 915     show = !!show; /* make it boolean */
 916     PROP_SET32(RootWindow(ob_display, ob_screen),
 917                net_showing_desktop, cardinal, show);
 918 }
 919
 920 void screen_install_colormap(ObClient *client, gboolean install)
 921 {
 922     XWindowAttributes wa;
 923
 924     if (client == NULL) {
 925         if (install)
 926             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 927         else
 928             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 929     } else {
 930         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
 931             wa.colormap != None) {
 932             xerror_set_ignore(TRUE);
 933             if (install)
 934                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 935             else
 936                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 937             xerror_set_ignore(FALSE);
 938         }
 939     }
 940 }
 941
 942 static inline void
 943 screen_area_add_strut_left(const StrutPartial *s, const Rect *monitor_area,
 944                            gint edge, Strut *ret)
 945 {
 946     if (s->left &&
 947         ((s->left_end <= s->left_start) ||
 948          (RECT_TOP(*monitor_area) < s->left_end &&
 949           RECT_BOTTOM(*monitor_area) > s->left_start)))
 950         ret->left = MAX(ret->left, edge);
 951 }
 952
 953 static inline void
 954 screen_area_add_strut_top(const StrutPartial *s, const Rect *monitor_area,
 955                           gint edge, Strut *ret)
 956 {
 957     if (s->top &&
 958         ((s->top_end <= s->top_start) ||
 959          (RECT_LEFT(*monitor_area) < s->top_end &&
 960           RECT_RIGHT(*monitor_area) > s->top_start)))
 961         ret->top = MAX(ret->top, edge);
 962 }
 963
 964 static inline void
 965 screen_area_add_strut_right(const StrutPartial *s, const Rect *monitor_area,
 966                             gint edge, Strut *ret)
 967 {
 968     if (s->right &&
 969         ((s->right_end <= s->right_start) ||
 970          (RECT_TOP(*monitor_area) < s->right_end &&
 971           RECT_BOTTOM(*monitor_area) > s->right_start)))
 972         ret->right = MAX(ret->right, edge);
 973 }
 974
 975 static inline void
 976 screen_area_add_strut_bottom(const StrutPartial *s, const Rect *monitor_area,
 977                              gint edge, Strut *ret)
 978 {
 979     if (s->bottom &&
 980         ((s->bottom_end <= s->bottom_start) ||
 981          (RECT_LEFT(*monitor_area) < s->bottom_end &&
 982           RECT_RIGHT(*monitor_area) > s->bottom_start)))
 983         ret->bottom = MAX(ret->bottom, edge);
 984 }
 985
 986 void screen_update_areas()
 987 {
 988     guint i, x;
 989     gulong *dims;
 990     GList *it;
 991     gint o;
 992
 993     g_free(monitor_area);
 994     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
 995
 996     if (area) {
 997         for (i = 0; area[i]; ++i)
 998             g_free(area[i]);
 999         g_free(area);
1000     }
1001
1002     area = g_new(Rect*, screen_num_desktops + 2);
1003     for (i = 0; i < screen_num_desktops + 1; ++i)
1004         area[i] = g_new0(Rect, screen_num_monitors + 1);
1005     area[i] = NULL;
1006
1007     dims = g_new(gulong, 4 * screen_num_desktops);
1008
1009     for (i = 0; i < screen_num_desktops + 1; ++i) {
1010         Strut *struts;
1011         gint l, r, t, b;
1012
1013         struts = g_new0(Strut, screen_num_monitors);
1014
1015         /* calc the xinerama areas */
1016         for (x = 0; x < screen_num_monitors; ++x) {
1017             area[i][x] = monitor_area[x];
1018             if (x == 0) {
1019                 l = monitor_area[x].x;
1020                 t = monitor_area[x].y;
1021                 r = monitor_area[x].x + monitor_area[x].width - 1;
1022                 b = monitor_area[x].y + monitor_area[x].height - 1;
1023             } else {
1024                 l = MIN(l, monitor_area[x].x);
1025                 t = MIN(t, monitor_area[x].y);
1026                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
1027                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
1028             }
1029         }
1030         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
1031
1032         /* apply the struts */
1033
1034         /* find the left-most xin heads, i do this in 2 loops :| */
1035         o = area[i][0].x;
1036         for (x = 1; x < screen_num_monitors; ++x)
1037             o = MIN(o, area[i][x].x);
1038
1039         for (x = 0; x < screen_num_monitors; ++x) {
1040             for (it = client_list; it; it = g_list_next(it)) {
1041                 ObClient *c = it->data;
1042                 screen_area_add_strut_left(&c->strut,
1043                                            &monitor_area[x],
1044                                            o + c->strut.left - area[i][x].x,
1045                                            &struts[x]);
1046             }
1047             screen_area_add_strut_left(&dock_strut,
1048                                        &monitor_area[x],
1049                                        o + dock_strut.left - area[i][x].x,
1050                                        &struts[x]);
1051
1052             area[i][x].x += struts[x].left;
1053             area[i][x].width -= struts[x].left;
1054         }
1055
1056         /* find the top-most xin heads, i do this in 2 loops :| */
1057         o = area[i][0].y;
1058         for (x = 1; x < screen_num_monitors; ++x)
1059             o = MIN(o, area[i][x].y);
1060
1061         for (x = 0; x < screen_num_monitors; ++x) {
1062             for (it = client_list; it; it = g_list_next(it)) {
1063                 ObClient *c = it->data;
1064                 screen_area_add_strut_top(&c->strut,
1065                                            &monitor_area[x],
1066                                            o + c->strut.top - area[i][x].y,
1067                                            &struts[x]);
1068             }
1069             screen_area_add_strut_top(&dock_strut,
1070                                       &monitor_area[x],
1071                                       o + dock_strut.top - area[i][x].y,
1072                                       &struts[x]);
1073
1074             area[i][x].y += struts[x].top;
1075             area[i][x].height -= struts[x].top;
1076         }
1077
1078         /* find the right-most xin heads, i do this in 2 loops :| */
1079         o = area[i][0].x + area[i][0].width - 1;
1080         for (x = 1; x < screen_num_monitors; ++x)
1081             o = MAX(o, area[i][x].x + area[i][x].width - 1);
1082
1083         for (x = 0; x < screen_num_monitors; ++x) {
1084             for (it = client_list; it; it = g_list_next(it)) {
1085                 ObClient *c = it->data;
1086                 screen_area_add_strut_right(&c->strut,
1087                                            &monitor_area[x],
1088                                            (area[i][x].x +
1089                                             area[i][x].width - 1) -
1090                                             (o - c->strut.right),
1091                                             &struts[x]);
1092             }
1093             screen_area_add_strut_right(&dock_strut,
1094                                         &monitor_area[x],
1095                                         (area[i][x].x +
1096                                          area[i][x].width - 1) -
1097                                         (o - dock_strut.right),
1098                                         &struts[x]);
1099
1100             area[i][x].width -= struts[x].right;
1101         }
1102
1103         /* find the bottom-most xin heads, i do this in 2 loops :| */
1104         o = area[i][0].y + area[i][0].height - 1;
1105         for (x = 1; x < screen_num_monitors; ++x)
1106             o = MAX(o, area[i][x].y + area[i][x].height - 1);
1107
1108         for (x = 0; x < screen_num_monitors; ++x) {
1109             for (it = client_list; it; it = g_list_next(it)) {
1110                 ObClient *c = it->data;
1111                 screen_area_add_strut_bottom(&c->strut,
1112                                              &monitor_area[x],
1113                                              (area[i][x].y +
1114                                               area[i][x].height - 1) - \
1115                                              (o - c->strut.bottom),
1116                                              &struts[x]);
1117             }
1118             screen_area_add_strut_bottom(&dock_strut,
1119                                          &monitor_area[x],
1120                                          (area[i][x].y +
1121                                           area[i][x].height - 1) - \
1122                                          (o - dock_strut.bottom),
1123                                          &struts[x]);
1124
1125             area[i][x].height -= struts[x].bottom;
1126         }
1127
1128         l = RECT_LEFT(area[i][0]);
1129         t = RECT_TOP(area[i][0]);
1130         r = RECT_RIGHT(area[i][0]);
1131         b = RECT_BOTTOM(area[i][0]);
1132         for (x = 1; x < screen_num_monitors; ++x) {
1133             l = MIN(l, RECT_LEFT(area[i][x]));
1134             t = MIN(l, RECT_TOP(area[i][x]));
1135             r = MAX(r, RECT_RIGHT(area[i][x]));
1136             b = MAX(b, RECT_BOTTOM(area[i][x]));
1137         }
1138         RECT_SET(area[i][screen_num_monitors], l, t,
1139                  r - l + 1, b - t + 1);
1140
1141         /* XXX optimize when this is run? */
1142
1143         /* the area has changed, adjust all the maximized
1144            windows */
1145         for (it = client_list; it; it = g_list_next(it)) {
1146             ObClient *c = it->data;
1147             if (i < screen_num_desktops) {
1148                 if (c->desktop == i)
1149                     client_reconfigure(c);
1150             } else if (c->desktop == DESKTOP_ALL)
1151                 client_reconfigure(c);
1152         }
1153         if (i < screen_num_desktops) {
1154             /* don't set these for the 'all desktops' area */
1155             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1156             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1157             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1158             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1159         }
1160
1161         g_free(struts);
1162     }
1163
1164     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1165                 dims, 4 * screen_num_desktops);
1166
1167     g_free(dims);
1168 }
1169
1170 Rect *screen_area(guint desktop)
1171 {
1172     return screen_area_monitor(desktop, screen_num_monitors);
1173 }
1174
1175 Rect *screen_area_monitor(guint desktop, guint head)
1176 {
1177     if (head > screen_num_monitors)
1178         return NULL;
1179     if (desktop >= screen_num_desktops) {
1180         if (desktop == DESKTOP_ALL)
1181             return &area[screen_num_desktops][head];
1182         return NULL;
1183     }
1184     return &area[desktop][head];
1185 }
1186
1187 guint screen_find_monitor(Rect *search)
1188 {
1189     guint i;
1190     guint most = 0;
1191     guint mostv = 0;
1192
1193     for (i = 0; i < screen_num_monitors; ++i) {
1194         Rect *area = screen_physical_area_monitor(i);
1195         if (RECT_INTERSECTS_RECT(*area, *search)) {
1196             Rect r;
1197             guint v;
1198
1199             RECT_SET_INTERSECTION(r, *area, *search);
1200             v = r.width * r.height;
1201
1202             if (v > mostv) {
1203                 mostv = v;
1204                 most = i;
1205             }
1206         }
1207     }
1208     return most;
1209 }
1210
1211 Rect *screen_physical_area()
1212 {
1213     return screen_physical_area_monitor(screen_num_monitors);
1214 }
1215
1216 Rect *screen_physical_area_monitor(guint head)
1217 {
1218     if (head > screen_num_monitors)
1219         return NULL;
1220     return &monitor_area[head];
1221 }
1222
1223 void screen_set_root_cursor()
1224 {
1225     if (sn_app_starting())
1226         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1227                       ob_cursor(OB_CURSOR_BUSY));
1228     else
1229         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1230                       ob_cursor(OB_CURSOR_POINTER));
1231 }
1232
1233 gboolean screen_pointer_pos(gint *x, gint *y)
1234 {
1235     Window w;
1236     gint i;
1237     guint u;
1238
1239     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1240                            &w, &w, x, y, &i, &i, &u);
1241 }