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     /* have to try focus here because when you leave an empty desktop
 489        there is no focus out to watch for
 490
 491        do this before hiding the windows so if helper windows are coming
 492        with us, they don't get hidden
 493     */
 494     if (dofocus && (c = focus_fallback_target(TRUE, focus_client))) {
 495         /* only do the flicker reducing stuff ahead of time if we are going
 496            to call xsetinputfocus on the window ourselves. otherwise there is
 497            no guarantee the window will actually take focus.. */
 498         if (c->can_focus) {
 499             /* do this here so that if you switch desktops to a window with
 500                helper windows then the helper windows won't flash */
 501             client_bring_helper_windows(c);
 502             /* reduce flicker by hiliting now rather than waiting for the
 503                server FocusIn event */
 504             frame_adjust_focus(c->frame, TRUE);
 505         }
 506         client_focus(c);
 507     }
 508
 509     /* hide windows from bottom to top */
 510     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 511         if (WINDOW_IS_CLIENT(it->data)) {
 512             ObClient *c = it->data;
 513             client_hide(c);
 514         }
 515     }
 516
 517     event_ignore_queued_enters();
 518
 519     if (event_curtime != CurrentTime)
 520         screen_desktop_user_time = event_curtime;
 521 }
 522
 523 static void get_row_col(guint d, guint *r, guint *c)
 524 {
 525     switch (screen_desktop_layout.orientation) {
 526     case OB_ORIENTATION_HORZ:
 527         switch (screen_desktop_layout.start_corner) {
 528         case OB_CORNER_TOPLEFT:
 529             *r = d / screen_desktop_layout.columns;
 530             *c = d % screen_desktop_layout.columns;
 531             break;
 532         case OB_CORNER_BOTTOMLEFT:
 533             *r = screen_desktop_layout.rows - 1 -
 534                 d / screen_desktop_layout.columns;
 535             *c = d % screen_desktop_layout.columns;
 536             break;
 537         case OB_CORNER_TOPRIGHT:
 538             *r = d / screen_desktop_layout.columns;
 539             *c = screen_desktop_layout.columns - 1 -
 540                 d % screen_desktop_layout.columns;
 541             break;
 542         case OB_CORNER_BOTTOMRIGHT:
 543             *r = screen_desktop_layout.rows - 1 -
 544                 d / screen_desktop_layout.columns;
 545             *c = screen_desktop_layout.columns - 1 -
 546                 d % screen_desktop_layout.columns;
 547             break;
 548         }
 549         break;
 550     case OB_ORIENTATION_VERT:
 551         switch (screen_desktop_layout.start_corner) {
 552         case OB_CORNER_TOPLEFT:
 553             *r = d % screen_desktop_layout.rows;
 554             *c = d / screen_desktop_layout.rows;
 555             break;
 556         case OB_CORNER_BOTTOMLEFT:
 557             *r = screen_desktop_layout.rows - 1 -
 558                 d % screen_desktop_layout.rows;
 559             *c = d / screen_desktop_layout.rows;
 560             break;
 561         case OB_CORNER_TOPRIGHT:
 562             *r = d % screen_desktop_layout.rows;
 563             *c = screen_desktop_layout.columns - 1 -
 564                 d / screen_desktop_layout.rows;
 565             break;
 566         case OB_CORNER_BOTTOMRIGHT:
 567             *r = screen_desktop_layout.rows - 1 -
 568                 d % screen_desktop_layout.rows;
 569             *c = screen_desktop_layout.columns - 1 -
 570                 d / screen_desktop_layout.rows;
 571             break;
 572         }
 573         break;
 574     }
 575 }
 576
 577 static guint translate_row_col(guint r, guint c)
 578 {
 579     switch (screen_desktop_layout.orientation) {
 580     case OB_ORIENTATION_HORZ:
 581         switch (screen_desktop_layout.start_corner) {
 582         case OB_CORNER_TOPLEFT:
 583             return r % screen_desktop_layout.rows *
 584                 screen_desktop_layout.columns +
 585                 c % screen_desktop_layout.columns;
 586         case OB_CORNER_BOTTOMLEFT:
 587             return (screen_desktop_layout.rows - 1 -
 588                     r % screen_desktop_layout.rows) *
 589                 screen_desktop_layout.columns +
 590                 c % screen_desktop_layout.columns;
 591         case OB_CORNER_TOPRIGHT:
 592             return r % screen_desktop_layout.rows *
 593                 screen_desktop_layout.columns +
 594                 (screen_desktop_layout.columns - 1 -
 595                  c % screen_desktop_layout.columns);
 596         case OB_CORNER_BOTTOMRIGHT:
 597             return (screen_desktop_layout.rows - 1 -
 598                     r % screen_desktop_layout.rows) *
 599                 screen_desktop_layout.columns +
 600                 (screen_desktop_layout.columns - 1 -
 601                  c % screen_desktop_layout.columns);
 602         }
 603     case OB_ORIENTATION_VERT:
 604         switch (screen_desktop_layout.start_corner) {
 605         case OB_CORNER_TOPLEFT:
 606             return c % screen_desktop_layout.columns *
 607                 screen_desktop_layout.rows +
 608                 r % screen_desktop_layout.rows;
 609         case OB_CORNER_BOTTOMLEFT:
 610             return c % screen_desktop_layout.columns *
 611                 screen_desktop_layout.rows +
 612                 (screen_desktop_layout.rows - 1 -
 613                  r % screen_desktop_layout.rows);
 614         case OB_CORNER_TOPRIGHT:
 615             return (screen_desktop_layout.columns - 1 -
 616                     c % screen_desktop_layout.columns) *
 617                 screen_desktop_layout.rows +
 618                 r % screen_desktop_layout.rows;
 619         case OB_CORNER_BOTTOMRIGHT:
 620             return (screen_desktop_layout.columns - 1 -
 621                     c % screen_desktop_layout.columns) *
 622                 screen_desktop_layout.rows +
 623                 (screen_desktop_layout.rows - 1 -
 624                  r % screen_desktop_layout.rows);
 625         }
 626     }
 627     g_assert_not_reached();
 628     return 0;
 629 }
 630
 631 void screen_desktop_popup(guint d, gboolean show)
 632 {
 633     Rect *a;
 634
 635     if (!show) {
 636         pager_popup_hide(desktop_cycle_popup);
 637     } else {
 638         a = screen_physical_area_monitor(0);
 639         pager_popup_position(desktop_cycle_popup, CenterGravity,
 640                              a->x + a->width / 2, a->y + a->height / 2);
 641         pager_popup_max_width(desktop_cycle_popup,
 642                               MAX(a->width/3, POPUP_WIDTH));
 643         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
 644     }
 645 }
 646
 647 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 648                            gboolean dialog, gboolean done, gboolean cancel)
 649 {
 650     static gboolean first = TRUE;
 651     static guint origd, d;
 652     guint r, c;
 653
 654     if (cancel) {
 655         d = origd;
 656         goto done_cycle;
 657     } else if (done && dialog) {
 658         goto done_cycle;
 659     }
 660     if (first) {
 661         first = FALSE;
 662         d = origd = screen_desktop;
 663     }
 664
 665     get_row_col(d, &r, &c);
 666
 667     if (linear) {
 668         switch (dir) {
 669         case OB_DIRECTION_EAST:
 670             if (d < screen_num_desktops - 1)
 671                 ++d;
 672             else if (wrap)
 673                 d = 0;
 674             break;
 675         case OB_DIRECTION_WEST:
 676             if (d > 0)
 677                 --d;
 678             else if (wrap)
 679                 d = screen_num_desktops - 1;
 680             break;
 681         default:
 682             assert(0);
 683             return screen_desktop;
 684         }
 685     } else {
 686         switch (dir) {
 687         case OB_DIRECTION_EAST:
 688             ++c;
 689             if (c >= screen_desktop_layout.columns) {
 690                 if (wrap) {
 691                     c = 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                     ++c;
 701                 } else {
 702                     d = screen_desktop;
 703                     goto show_cycle_dialog;
 704                 }
 705             }
 706             break;
 707         case OB_DIRECTION_WEST:
 708             --c;
 709             if (c >= screen_desktop_layout.columns) {
 710                 if (wrap) {
 711                     c = screen_desktop_layout.columns - 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                     --c;
 721                 } else {
 722                     d = screen_desktop;
 723                     goto show_cycle_dialog;
 724                 }
 725             }
 726             break;
 727         case OB_DIRECTION_SOUTH:
 728             ++r;
 729             if (r >= screen_desktop_layout.rows) {
 730                 if (wrap) {
 731                     r = 0;
 732                 } else {
 733                     d = screen_desktop;
 734                     goto show_cycle_dialog;
 735                 }
 736             }
 737             d = translate_row_col(r, c);
 738             if (d >= screen_num_desktops) {
 739                 if (wrap) {
 740                     ++r;
 741                 } else {
 742                     d = screen_desktop;
 743                     goto show_cycle_dialog;
 744                 }
 745             }
 746             break;
 747         case OB_DIRECTION_NORTH:
 748             --r;
 749             if (r >= screen_desktop_layout.rows) {
 750                 if (wrap) {
 751                     r = screen_desktop_layout.rows - 1;
 752                 } else {
 753                     d = screen_desktop;
 754                     goto show_cycle_dialog;
 755                 }
 756             }
 757             d = translate_row_col(r, c);
 758             if (d >= screen_num_desktops) {
 759                 if (wrap) {
 760                     --r;
 761                 } else {
 762                     d = screen_desktop;
 763                     goto show_cycle_dialog;
 764                 }
 765             }
 766             break;
 767         default:
 768             assert(0);
 769             return d = screen_desktop;
 770         }
 771
 772         d = translate_row_col(r, c);
 773     }
 774
 775 show_cycle_dialog:
 776     if (dialog) {
 777         screen_desktop_popup(d, TRUE);
 778         return d;
 779     }
 780
 781 done_cycle:
 782     first = TRUE;
 783
 784     screen_desktop_popup(0, FALSE);
 785
 786     return d;
 787 }
 788
 789 void screen_update_layout()
 790 {
 791     ObOrientation orient;
 792     ObCorner corner;
 793     guint rows;
 794     guint cols;
 795     guint32 *data;
 796     guint num;
 797     gboolean valid = FALSE;
 798
 799     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 800                     net_desktop_layout, cardinal, &data, &num)) {
 801         if (num == 3 || num == 4) {
 802
 803             if (data[0] == prop_atoms.net_wm_orientation_vert)
 804                 orient = OB_ORIENTATION_VERT;
 805             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 806                 orient = OB_ORIENTATION_HORZ;
 807             else
 808                 goto screen_update_layout_bail;
 809
 810             if (num < 4)
 811                 corner = OB_CORNER_TOPLEFT;
 812             else {
 813                 if (data[3] == prop_atoms.net_wm_topleft)
 814                     corner = OB_CORNER_TOPLEFT;
 815                 else if (data[3] == prop_atoms.net_wm_topright)
 816                     corner = OB_CORNER_TOPRIGHT;
 817                 else if (data[3] == prop_atoms.net_wm_bottomright)
 818                     corner = OB_CORNER_BOTTOMRIGHT;
 819                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 820                     corner = OB_CORNER_BOTTOMLEFT;
 821                 else
 822                     goto screen_update_layout_bail;
 823             }
 824
 825             cols = data[1];
 826             rows = data[2];
 827
 828             /* fill in a zero rows/columns */
 829             if ((cols == 0 && rows == 0)) { /* both 0's is bad data.. */
 830                 goto screen_update_layout_bail;
 831             } else {
 832                 if (cols == 0) {
 833                     cols = screen_num_desktops / rows;
 834                     if (rows * cols < screen_num_desktops)
 835                         cols++;
 836                     if (rows * cols >= screen_num_desktops + cols)
 837                         rows--;
 838                 } else if (rows == 0) {
 839                     rows = screen_num_desktops / cols;
 840                     if (cols * rows < screen_num_desktops)
 841                         rows++;
 842                     if (cols * rows >= screen_num_desktops + rows)
 843                         cols--;
 844                 }
 845             }
 846
 847             /* bounds checking */
 848             if (orient == OB_ORIENTATION_HORZ) {
 849                 cols = MIN(screen_num_desktops, cols);
 850                 rows = MIN(rows, (screen_num_desktops + cols - 1) / cols);
 851                 cols = screen_num_desktops / rows +
 852                     !!(screen_num_desktops % rows);
 853             } else {
 854                 rows = MIN(screen_num_desktops, rows);
 855                 cols = MIN(cols, (screen_num_desktops + rows - 1) / rows);
 856                 rows = screen_num_desktops / cols +
 857                     !!(screen_num_desktops % cols);
 858             }
 859
 860             valid = TRUE;
 861         }
 862     screen_update_layout_bail:
 863         g_free(data);
 864     }
 865
 866     if (!valid) {
 867         /* defaults */
 868         orient = OB_ORIENTATION_HORZ;
 869         corner = OB_CORNER_TOPLEFT;
 870         rows = 1;
 871         cols = screen_num_desktops;
 872     }
 873
 874     screen_desktop_layout.orientation = orient;
 875     screen_desktop_layout.start_corner = corner;
 876     screen_desktop_layout.rows = rows;
 877     screen_desktop_layout.columns = cols;
 878 }
 879
 880 void screen_update_desktop_names()
 881 {
 882     guint i;
 883
 884     /* empty the array */
 885     g_strfreev(screen_desktop_names);
 886     screen_desktop_names = NULL;
 887
 888     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 889                    net_desktop_names, utf8, &screen_desktop_names))
 890         for (i = 0; screen_desktop_names[i] && i < screen_num_desktops; ++i);
 891     else
 892         i = 0;
 893     if (i < screen_num_desktops) {
 894         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
 895                                        screen_num_desktops + 1);
 896         screen_desktop_names[screen_num_desktops] = NULL;
 897         for (; i < screen_num_desktops; ++i)
 898             screen_desktop_names[i] = g_strdup_printf("desktop %i", i + 1);
 899     }
 900
 901     /* resize the pager for these names */
 902     pager_popup_text_width_to_strings(desktop_cycle_popup,
 903                                       screen_desktop_names,
 904                                       screen_num_desktops);
 905 }
 906
 907 void screen_show_desktop(gboolean show, gboolean restore_focus)
 908 {
 909     GList *it;
 910
 911     if (show == screen_showing_desktop) return; /* no change */
 912
 913     screen_showing_desktop = show;
 914
 915     if (show) {
 916         /* bottom to top */
 917         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 918             if (WINDOW_IS_CLIENT(it->data)) {
 919                 ObClient *client = it->data;
 920                 client_showhide(client);
 921             }
 922         }
 923     } else {
 924         /* top to bottom */
 925         for (it = stacking_list; it; it = g_list_next(it)) {
 926             if (WINDOW_IS_CLIENT(it->data)) {
 927                 ObClient *client = it->data;
 928                 client_showhide(client);
 929             }
 930         }
 931     }
 932
 933     if (show) {
 934         /* focus desktop */
 935         for (it = focus_order; it; it = g_list_next(it)) {
 936             ObClient *c = it->data;
 937             if (c->type == OB_CLIENT_TYPE_DESKTOP &&
 938                 (c->desktop == screen_desktop || c->desktop == DESKTOP_ALL) &&
 939                 client_focus(it->data))
 940                 break;
 941         }
 942     } else if (restore_focus) {
 943         ObClient *c;
 944
 945         /* use NULL for the "old" argument because the desktop was focused
 946            and we don't want to fallback to the desktop by default */
 947         if ((c = focus_fallback_target(TRUE, NULL)))
 948             client_focus(c);
 949     }
 950
 951     show = !!show; /* make it boolean */
 952     PROP_SET32(RootWindow(ob_display, ob_screen),
 953                net_showing_desktop, cardinal, show);
 954 }
 955
 956 void screen_install_colormap(ObClient *client, gboolean install)
 957 {
 958     if (client == NULL) {
 959         if (install)
 960             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 961         else
 962             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 963     } else {
 964         xerror_set_ignore(TRUE);
 965         if (install) {
 966             if (client->colormap != None)
 967                 XInstallColormap(RrDisplay(ob_rr_inst), client->colormap);
 968         } else
 969             XUninstallColormap(RrDisplay(ob_rr_inst), client->colormap);
 970         xerror_set_ignore(FALSE);
 971     }
 972 }
 973
 974 static inline void
 975 screen_area_add_strut_left(const StrutPartial *s, const Rect *monitor_area,
 976                            gint edge, Strut *ret)
 977 {
 978     if (s->left &&
 979         ((s->left_end <= s->left_start) ||
 980          (RECT_TOP(*monitor_area) < s->left_end &&
 981           RECT_BOTTOM(*monitor_area) > s->left_start)))
 982         ret->left = MAX(ret->left, edge);
 983 }
 984
 985 static inline void
 986 screen_area_add_strut_top(const StrutPartial *s, const Rect *monitor_area,
 987                           gint edge, Strut *ret)
 988 {
 989     if (s->top &&
 990         ((s->top_end <= s->top_start) ||
 991          (RECT_LEFT(*monitor_area) < s->top_end &&
 992           RECT_RIGHT(*monitor_area) > s->top_start)))
 993         ret->top = MAX(ret->top, edge);
 994 }
 995
 996 static inline void
 997 screen_area_add_strut_right(const StrutPartial *s, const Rect *monitor_area,
 998                             gint edge, Strut *ret)
 999 {
1000     if (s->right &&
1001         ((s->right_end <= s->right_start) ||
1002          (RECT_TOP(*monitor_area) < s->right_end &&
1003           RECT_BOTTOM(*monitor_area) > s->right_start)))
1004         ret->right = MAX(ret->right, edge);
1005 }
1006
1007 static inline void
1008 screen_area_add_strut_bottom(const StrutPartial *s, const Rect *monitor_area,
1009                              gint edge, Strut *ret)
1010 {
1011     if (s->bottom &&
1012         ((s->bottom_end <= s->bottom_start) ||
1013          (RECT_LEFT(*monitor_area) < s->bottom_end &&
1014           RECT_RIGHT(*monitor_area) > s->bottom_start)))
1015         ret->bottom = MAX(ret->bottom, edge);
1016 }
1017
1018 void screen_update_areas()
1019 {
1020     guint i, x;
1021     gulong *dims;
1022     GList *it;
1023     gint o;
1024
1025     g_free(monitor_area);
1026     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
1027
1028     if (area) {
1029         for (i = 0; area[i]; ++i)
1030             g_free(area[i]);
1031         g_free(area);
1032     }
1033
1034     area = g_new(Rect*, screen_num_desktops + 2);
1035     for (i = 0; i < screen_num_desktops + 1; ++i)
1036         area[i] = g_new0(Rect, screen_num_monitors + 1);
1037     area[i] = NULL;
1038
1039     dims = g_new(gulong, 4 * screen_num_desktops);
1040
1041     for (i = 0; i < screen_num_desktops + 1; ++i) {
1042         Strut *struts;
1043         gint l, r, t, b;
1044
1045         struts = g_new0(Strut, screen_num_monitors);
1046
1047         /* calc the xinerama areas */
1048         for (x = 0; x < screen_num_monitors; ++x) {
1049             area[i][x] = monitor_area[x];
1050             if (x == 0) {
1051                 l = monitor_area[x].x;
1052                 t = monitor_area[x].y;
1053                 r = monitor_area[x].x + monitor_area[x].width - 1;
1054                 b = monitor_area[x].y + monitor_area[x].height - 1;
1055             } else {
1056                 l = MIN(l, monitor_area[x].x);
1057                 t = MIN(t, monitor_area[x].y);
1058                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
1059                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
1060             }
1061         }
1062         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
1063
1064         /* apply the struts */
1065
1066         /* find the left-most xin heads, i do this in 2 loops :| */
1067         o = area[i][0].x;
1068         for (x = 1; x < screen_num_monitors; ++x)
1069             o = MIN(o, area[i][x].x);
1070
1071         for (x = 0; x < screen_num_monitors; ++x) {
1072             for (it = client_list; it; it = g_list_next(it)) {
1073                 ObClient *c = it->data;
1074                 screen_area_add_strut_left(&c->strut,
1075                                            &monitor_area[x],
1076                                            o + c->strut.left - area[i][x].x,
1077                                            &struts[x]);
1078             }
1079             screen_area_add_strut_left(&dock_strut,
1080                                        &monitor_area[x],
1081                                        o + dock_strut.left - area[i][x].x,
1082                                        &struts[x]);
1083
1084             area[i][x].x += struts[x].left;
1085             area[i][x].width -= struts[x].left;
1086         }
1087
1088         /* find the top-most xin heads, i do this in 2 loops :| */
1089         o = area[i][0].y;
1090         for (x = 1; x < screen_num_monitors; ++x)
1091             o = MIN(o, area[i][x].y);
1092
1093         for (x = 0; x < screen_num_monitors; ++x) {
1094             for (it = client_list; it; it = g_list_next(it)) {
1095                 ObClient *c = it->data;
1096                 screen_area_add_strut_top(&c->strut,
1097                                            &monitor_area[x],
1098                                            o + c->strut.top - area[i][x].y,
1099                                            &struts[x]);
1100             }
1101             screen_area_add_strut_top(&dock_strut,
1102                                       &monitor_area[x],
1103                                       o + dock_strut.top - area[i][x].y,
1104                                       &struts[x]);
1105
1106             area[i][x].y += struts[x].top;
1107             area[i][x].height -= struts[x].top;
1108         }
1109
1110         /* find the right-most xin heads, i do this in 2 loops :| */
1111         o = area[i][0].x + area[i][0].width - 1;
1112         for (x = 1; x < screen_num_monitors; ++x)
1113             o = MAX(o, area[i][x].x + area[i][x].width - 1);
1114
1115         for (x = 0; x < screen_num_monitors; ++x) {
1116             for (it = client_list; it; it = g_list_next(it)) {
1117                 ObClient *c = it->data;
1118                 screen_area_add_strut_right(&c->strut,
1119                                            &monitor_area[x],
1120                                            (area[i][x].x +
1121                                             area[i][x].width - 1) -
1122                                             (o - c->strut.right),
1123                                             &struts[x]);
1124             }
1125             screen_area_add_strut_right(&dock_strut,
1126                                         &monitor_area[x],
1127                                         (area[i][x].x +
1128                                          area[i][x].width - 1) -
1129                                         (o - dock_strut.right),
1130                                         &struts[x]);
1131
1132             area[i][x].width -= struts[x].right;
1133         }
1134
1135         /* find the bottom-most xin heads, i do this in 2 loops :| */
1136         o = area[i][0].y + area[i][0].height - 1;
1137         for (x = 1; x < screen_num_monitors; ++x)
1138             o = MAX(o, area[i][x].y + area[i][x].height - 1);
1139
1140         for (x = 0; x < screen_num_monitors; ++x) {
1141             for (it = client_list; it; it = g_list_next(it)) {
1142                 ObClient *c = it->data;
1143                 screen_area_add_strut_bottom(&c->strut,
1144                                              &monitor_area[x],
1145                                              (area[i][x].y +
1146                                               area[i][x].height - 1) - \
1147                                              (o - c->strut.bottom),
1148                                              &struts[x]);
1149             }
1150             screen_area_add_strut_bottom(&dock_strut,
1151                                          &monitor_area[x],
1152                                          (area[i][x].y +
1153                                           area[i][x].height - 1) - \
1154                                          (o - dock_strut.bottom),
1155                                          &struts[x]);
1156
1157             area[i][x].height -= struts[x].bottom;
1158         }
1159
1160         l = RECT_LEFT(area[i][0]);
1161         t = RECT_TOP(area[i][0]);
1162         r = RECT_RIGHT(area[i][0]);
1163         b = RECT_BOTTOM(area[i][0]);
1164         for (x = 1; x < screen_num_monitors; ++x) {
1165             l = MIN(l, RECT_LEFT(area[i][x]));
1166             t = MIN(l, RECT_TOP(area[i][x]));
1167             r = MAX(r, RECT_RIGHT(area[i][x]));
1168             b = MAX(b, RECT_BOTTOM(area[i][x]));
1169         }
1170         RECT_SET(area[i][screen_num_monitors], l, t,
1171                  r - l + 1, b - t + 1);
1172
1173         /* XXX optimize when this is run? */
1174
1175         /* the area has changed, adjust all the maximized
1176            windows */
1177         for (it = client_list; it; it = g_list_next(it)) {
1178             ObClient *c = it->data;
1179             if (i < screen_num_desktops) {
1180                 if (c->desktop == i)
1181                     client_reconfigure(c);
1182             } else if (c->desktop == DESKTOP_ALL)
1183                 client_reconfigure(c);
1184         }
1185         if (i < screen_num_desktops) {
1186             /* don't set these for the 'all desktops' area */
1187             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1188             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1189             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1190             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1191         }
1192
1193         g_free(struts);
1194     }
1195
1196     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1197                 dims, 4 * screen_num_desktops);
1198
1199     g_free(dims);
1200 }
1201
1202 Rect *screen_area(guint desktop)
1203 {
1204     return screen_area_monitor(desktop, screen_num_monitors);
1205 }
1206
1207 Rect *screen_area_monitor(guint desktop, guint head)
1208 {
1209     if (head > screen_num_monitors)
1210         return NULL;
1211     if (desktop >= screen_num_desktops) {
1212         if (desktop == DESKTOP_ALL)
1213             return &area[screen_num_desktops][head];
1214         return NULL;
1215     }
1216     return &area[desktop][head];
1217 }
1218
1219 guint screen_find_monitor(Rect *search)
1220 {
1221     guint i;
1222     guint most = 0;
1223     guint mostv = 0;
1224
1225     for (i = 0; i < screen_num_monitors; ++i) {
1226         Rect *area = screen_physical_area_monitor(i);
1227         if (RECT_INTERSECTS_RECT(*area, *search)) {
1228             Rect r;
1229             guint v;
1230
1231             RECT_SET_INTERSECTION(r, *area, *search);
1232             v = r.width * r.height;
1233
1234             if (v > mostv) {
1235                 mostv = v;
1236                 most = i;
1237             }
1238         }
1239     }
1240     return most;
1241 }
1242
1243 Rect *screen_physical_area()
1244 {
1245     return screen_physical_area_monitor(screen_num_monitors);
1246 }
1247
1248 Rect *screen_physical_area_monitor(guint head)
1249 {
1250     if (head > screen_num_monitors)
1251         return NULL;
1252     return &monitor_area[head];
1253 }
1254
1255 void screen_set_root_cursor()
1256 {
1257     if (sn_app_starting())
1258         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1259                       ob_cursor(OB_CURSOR_BUSY));
1260     else
1261         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1262                       ob_cursor(OB_CURSOR_POINTER));
1263 }
1264
1265 gboolean screen_pointer_pos(gint *x, gint *y)
1266 {
1267     Window w;
1268     gint i;
1269     guint u;
1270
1271     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1272                            &w, &w, x, y, &i, &i, &u);
1273 }