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
 304     if (!reconfig)
 305         /* get the initial size */
 306         screen_resize();
 307
 308     desktop_cycle_popup = pager_popup_new(FALSE);
 309     pager_popup_height(desktop_cycle_popup, POPUP_HEIGHT);
 310
 311 #if 0
 312     /* get the names */
 313     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 314                    net_desktop_names, utf8, &screen_desktop_names))
 315         for (i = 0; screen_desktop_names[i]; ++i);
 316     else
 317 #endif
 318         i = 0;
 319     numnames = g_slist_length(config_desktops_names);
 320     if (numnames > i) {
 321         GSList *it;
 322
 323         screen_desktop_names = g_renew(gchar*,screen_desktop_names,numnames+1);
 324         screen_desktop_names[numnames] = NULL;
 325
 326         for (it = g_slist_nth(config_desktops_names, i); it;
 327              it = g_slist_next(it), ++i)
 328         {
 329             screen_desktop_names[i] = g_strdup(it->data);
 330         }
 331     }
 332     /* then set the names */
 333     PROP_SETSS(RootWindow(ob_display, ob_screen),
 334                net_desktop_names, screen_desktop_names);
 335     g_strfreev(screen_desktop_names);
 336     screen_desktop_names = NULL;
 337
 338     if (!reconfig)
 339         screen_num_desktops = 0;
 340     screen_set_num_desktops(config_desktops_num);
 341     if (!reconfig) {
 342         guint32 d;
 343         /* start on the current desktop when a wm was already running */
 344         if (PROP_GET32(RootWindow(ob_display, ob_screen),
 345                        net_current_desktop, cardinal, &d) &&
 346             d < screen_num_desktops)
 347         {
 348             screen_set_desktop(d, FALSE);
 349         } else if (session_desktop >= 0)
 350             screen_set_desktop(MIN((guint)session_desktop,
 351                                    screen_num_desktops), FALSE);
 352         else
 353             screen_set_desktop(MIN(config_screen_firstdesk,
 354                                    screen_num_desktops) - 1, FALSE);
 355
 356         /* don't start in showing-desktop mode */
 357         screen_showing_desktop = FALSE;
 358         PROP_SET32(RootWindow(ob_display, ob_screen),
 359                    net_showing_desktop, cardinal, screen_showing_desktop);
 360
 361         screen_update_layout();
 362     }
 363 }
 364
 365 void screen_shutdown(gboolean reconfig)
 366 {
 367     Rect **r;
 368
 369     pager_popup_free(desktop_cycle_popup);
 370
 371     if (!reconfig) {
 372         XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 373                      NoEventMask);
 374
 375         /* we're not running here no more! */
 376         PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 377         /* not without us */
 378         PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 379         /* don't keep this mode */
 380         PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 381
 382         XDestroyWindow(ob_display, screen_support_win);
 383     }
 384
 385     g_strfreev(screen_desktop_names);
 386     screen_desktop_names = NULL;
 387     for (r = area; *r; ++r)
 388         g_free(*r);
 389     g_free(area);
 390     area = NULL;
 391 }
 392
 393 void screen_resize()
 394 {
 395     static gint oldw = 0, oldh = 0;
 396     gint w, h;
 397     GList *it;
 398     gulong geometry[2];
 399
 400     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 401     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 402
 403     if (w == oldw && h == oldh) return;
 404
 405     oldw = w; oldh = h;
 406
 407     /* Set the _NET_DESKTOP_GEOMETRY hint */
 408     screen_physical_size.width = geometry[0] = w;
 409     screen_physical_size.height = geometry[1] = h;
 410     PROP_SETA32(RootWindow(ob_display, ob_screen),
 411                 net_desktop_geometry, cardinal, geometry, 2);
 412
 413     if (ob_state() == OB_STATE_STARTING)
 414         return;
 415
 416     screen_update_areas();
 417     dock_configure();
 418
 419     for (it = client_list; it; it = g_list_next(it))
 420         client_move_onscreen(it->data, FALSE);
 421 }
 422
 423 void screen_set_num_desktops(guint num)
 424 {
 425     guint old;
 426     gulong *viewport;
 427     GList *it;
 428
 429     g_assert(num > 0);
 430
 431     if (screen_num_desktops == num) return;
 432
 433     old = screen_num_desktops;
 434     screen_num_desktops = num;
 435     PROP_SET32(RootWindow(ob_display, ob_screen),
 436                net_number_of_desktops, cardinal, num);
 437
 438     /* set the viewport hint */
 439     viewport = g_new0(gulong, num * 2);
 440     PROP_SETA32(RootWindow(ob_display, ob_screen),
 441                 net_desktop_viewport, cardinal, viewport, num * 2);
 442     g_free(viewport);
 443
 444     /* the number of rows/columns will differ */
 445     screen_update_layout();
 446
 447     /* move windows on desktops that will no longer exist! */
 448     for (it = client_list; it; it = g_list_next(it)) {
 449         ObClient *c = it->data;
 450         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 451             client_set_desktop(c, num - 1, FALSE);
 452     }
 453
 454     /* change our struts/area to match (after moving windows) */
 455     screen_update_areas();
 456
 457     /* may be some unnamed desktops that we need to fill in with names
 458      (after updating the areas so the popup can resize) */
 459     screen_update_desktop_names();
 460
 461     /* change our desktop if we're on one that no longer exists! */
 462     if (screen_desktop >= screen_num_desktops)
 463         screen_set_desktop(num - 1, TRUE);
 464 }
 465
 466 void screen_set_desktop(guint num, gboolean dofocus)
 467 {
 468     ObClient *c;
 469     GList *it;
 470     guint old;
 471
 472     g_assert(num < screen_num_desktops);
 473
 474     old = screen_desktop;
 475     screen_desktop = num;
 476     PROP_SET32(RootWindow(ob_display, ob_screen),
 477                net_current_desktop, cardinal, num);
 478
 479     if (old == num) return;
 480
 481     screen_last_desktop = old;
 482
 483     ob_debug("Moving to desktop %d\n", num+1);
 484
 485     if (moveresize_client)
 486         client_set_desktop(moveresize_client, num, TRUE);
 487
 488     /* show windows before hiding the rest to lessen the enter/leave events */
 489
 490     /* show windows from top to bottom */
 491     for (it = stacking_list; it; it = g_list_next(it)) {
 492         if (WINDOW_IS_CLIENT(it->data)) {
 493             ObClient *c = it->data;
 494             client_show(c);
 495         }
 496     }
 497
 498     /* hide windows from bottom to top */
 499     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 500         if (WINDOW_IS_CLIENT(it->data)) {
 501             ObClient *c = it->data;
 502             client_hide(c);
 503         }
 504     }
 505
 506     /* have to try focus here because when you leave an empty desktop
 507        there is no focus out to watch for */
 508     if (dofocus && (c = focus_fallback_target(TRUE, focus_client))) {
 509         /* reduce flicker by hiliting now rather than waiting for the server
 510            FocusIn event */
 511         frame_adjust_focus(c->frame, TRUE);
 512         client_focus(c);
 513     }
 514
 515     event_ignore_queued_enters();
 516
 517     if (event_curtime != CurrentTime)
 518         screen_desktop_user_time = event_curtime;
 519 }
 520
 521 static void get_row_col(guint d, guint *r, guint *c)
 522 {
 523     switch (screen_desktop_layout.orientation) {
 524     case OB_ORIENTATION_HORZ:
 525         switch (screen_desktop_layout.start_corner) {
 526         case OB_CORNER_TOPLEFT:
 527             *r = d / screen_desktop_layout.columns;
 528             *c = d % screen_desktop_layout.columns;
 529             break;
 530         case OB_CORNER_BOTTOMLEFT:
 531             *r = screen_desktop_layout.rows - 1 -
 532                 d / screen_desktop_layout.columns;
 533             *c = d % screen_desktop_layout.columns;
 534             break;
 535         case OB_CORNER_TOPRIGHT:
 536             *r = d / screen_desktop_layout.columns;
 537             *c = screen_desktop_layout.columns - 1 -
 538                 d % screen_desktop_layout.columns;
 539             break;
 540         case OB_CORNER_BOTTOMRIGHT:
 541             *r = screen_desktop_layout.rows - 1 -
 542                 d / screen_desktop_layout.columns;
 543             *c = screen_desktop_layout.columns - 1 -
 544                 d % screen_desktop_layout.columns;
 545             break;
 546         }
 547         break;
 548     case OB_ORIENTATION_VERT:
 549         switch (screen_desktop_layout.start_corner) {
 550         case OB_CORNER_TOPLEFT:
 551             *r = d % screen_desktop_layout.rows;
 552             *c = d / screen_desktop_layout.rows;
 553             break;
 554         case OB_CORNER_BOTTOMLEFT:
 555             *r = screen_desktop_layout.rows - 1 -
 556                 d % screen_desktop_layout.rows;
 557             *c = d / screen_desktop_layout.rows;
 558             break;
 559         case OB_CORNER_TOPRIGHT:
 560             *r = d % screen_desktop_layout.rows;
 561             *c = screen_desktop_layout.columns - 1 -
 562                 d / screen_desktop_layout.rows;
 563             break;
 564         case OB_CORNER_BOTTOMRIGHT:
 565             *r = screen_desktop_layout.rows - 1 -
 566                 d % screen_desktop_layout.rows;
 567             *c = screen_desktop_layout.columns - 1 -
 568                 d / screen_desktop_layout.rows;
 569             break;
 570         }
 571         break;
 572     }
 573 }
 574
 575 static guint translate_row_col(guint r, guint c)
 576 {
 577     switch (screen_desktop_layout.orientation) {
 578     case OB_ORIENTATION_HORZ:
 579         switch (screen_desktop_layout.start_corner) {
 580         case OB_CORNER_TOPLEFT:
 581             return r % screen_desktop_layout.rows *
 582                 screen_desktop_layout.columns +
 583                 c % screen_desktop_layout.columns;
 584         case OB_CORNER_BOTTOMLEFT:
 585             return (screen_desktop_layout.rows - 1 -
 586                     r % screen_desktop_layout.rows) *
 587                 screen_desktop_layout.columns +
 588                 c % screen_desktop_layout.columns;
 589         case OB_CORNER_TOPRIGHT:
 590             return r % screen_desktop_layout.rows *
 591                 screen_desktop_layout.columns +
 592                 (screen_desktop_layout.columns - 1 -
 593                  c % screen_desktop_layout.columns);
 594         case OB_CORNER_BOTTOMRIGHT:
 595             return (screen_desktop_layout.rows - 1 -
 596                     r % screen_desktop_layout.rows) *
 597                 screen_desktop_layout.columns +
 598                 (screen_desktop_layout.columns - 1 -
 599                  c % screen_desktop_layout.columns);
 600         }
 601     case OB_ORIENTATION_VERT:
 602         switch (screen_desktop_layout.start_corner) {
 603         case OB_CORNER_TOPLEFT:
 604             return c % screen_desktop_layout.columns *
 605                 screen_desktop_layout.rows +
 606                 r % screen_desktop_layout.rows;
 607         case OB_CORNER_BOTTOMLEFT:
 608             return c % screen_desktop_layout.columns *
 609                 screen_desktop_layout.rows +
 610                 (screen_desktop_layout.rows - 1 -
 611                  r % screen_desktop_layout.rows);
 612         case OB_CORNER_TOPRIGHT:
 613             return (screen_desktop_layout.columns - 1 -
 614                     c % screen_desktop_layout.columns) *
 615                 screen_desktop_layout.rows +
 616                 r % screen_desktop_layout.rows;
 617         case OB_CORNER_BOTTOMRIGHT:
 618             return (screen_desktop_layout.columns - 1 -
 619                     c % screen_desktop_layout.columns) *
 620                 screen_desktop_layout.rows +
 621                 (screen_desktop_layout.rows - 1 -
 622                  r % screen_desktop_layout.rows);
 623         }
 624     }
 625     g_assert_not_reached();
 626     return 0;
 627 }
 628
 629 void screen_desktop_popup(guint d, gboolean show)
 630 {
 631     Rect *a;
 632
 633     if (!show) {
 634         pager_popup_hide(desktop_cycle_popup);
 635     } else {
 636         a = screen_physical_area_monitor(0);
 637         pager_popup_position(desktop_cycle_popup, CenterGravity,
 638                              a->x + a->width / 2, a->y + a->height / 2);
 639         pager_popup_max_width(desktop_cycle_popup,
 640                               MAX(a->width/3, POPUP_WIDTH));
 641         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
 642     }
 643 }
 644
 645 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 646                            gboolean dialog, gboolean done, gboolean cancel)
 647 {
 648     static gboolean first = TRUE;
 649     static guint origd, d;
 650     guint r, c;
 651
 652     if (cancel) {
 653         d = origd;
 654         goto done_cycle;
 655     } else if (done && dialog) {
 656         goto done_cycle;
 657     }
 658     if (first) {
 659         first = FALSE;
 660         d = origd = screen_desktop;
 661     }
 662
 663     get_row_col(d, &r, &c);
 664
 665     if (linear) {
 666         switch (dir) {
 667         case OB_DIRECTION_EAST:
 668             if (d < screen_num_desktops - 1)
 669                 ++d;
 670             else if (wrap)
 671                 d = 0;
 672             break;
 673         case OB_DIRECTION_WEST:
 674             if (d > 0)
 675                 --d;
 676             else if (wrap)
 677                 d = screen_num_desktops - 1;
 678             break;
 679         default:
 680             assert(0);
 681             return screen_desktop;
 682         }
 683     } else {
 684         switch (dir) {
 685         case OB_DIRECTION_EAST:
 686             ++c;
 687             if (c >= screen_desktop_layout.columns) {
 688                 if (wrap) {
 689                     c = 0;
 690                 } else {
 691                     d = screen_desktop;
 692                     goto show_cycle_dialog;
 693                 }
 694             }
 695             d = translate_row_col(r, c);
 696             if (d >= screen_num_desktops) {
 697                 if (wrap) {
 698                     ++c;
 699                 } else {
 700                     d = screen_desktop;
 701                     goto show_cycle_dialog;
 702                 }
 703             }
 704             break;
 705         case OB_DIRECTION_WEST:
 706             --c;
 707             if (c >= screen_desktop_layout.columns) {
 708                 if (wrap) {
 709                     c = screen_desktop_layout.columns - 1;
 710                 } else {
 711                     d = screen_desktop;
 712                     goto show_cycle_dialog;
 713                 }
 714             }
 715             d = translate_row_col(r, c);
 716             if (d >= screen_num_desktops) {
 717                 if (wrap) {
 718                     --c;
 719                 } else {
 720                     d = screen_desktop;
 721                     goto show_cycle_dialog;
 722                 }
 723             }
 724             break;
 725         case OB_DIRECTION_SOUTH:
 726             ++r;
 727             if (r >= screen_desktop_layout.rows) {
 728                 if (wrap) {
 729                     r = 0;
 730                 } else {
 731                     d = screen_desktop;
 732                     goto show_cycle_dialog;
 733                 }
 734             }
 735             d = translate_row_col(r, c);
 736             if (d >= screen_num_desktops) {
 737                 if (wrap) {
 738                     ++r;
 739                 } else {
 740                     d = screen_desktop;
 741                     goto show_cycle_dialog;
 742                 }
 743             }
 744             break;
 745         case OB_DIRECTION_NORTH:
 746             --r;
 747             if (r >= screen_desktop_layout.rows) {
 748                 if (wrap) {
 749                     r = screen_desktop_layout.rows - 1;
 750                 } else {
 751                     d = screen_desktop;
 752                     goto show_cycle_dialog;
 753                 }
 754             }
 755             d = translate_row_col(r, c);
 756             if (d >= screen_num_desktops) {
 757                 if (wrap) {
 758                     --r;
 759                 } else {
 760                     d = screen_desktop;
 761                     goto show_cycle_dialog;
 762                 }
 763             }
 764             break;
 765         default:
 766             assert(0);
 767             return d = screen_desktop;
 768         }
 769
 770         d = translate_row_col(r, c);
 771     }
 772
 773 show_cycle_dialog:
 774     if (dialog) {
 775         screen_desktop_popup(d, TRUE);
 776         return d;
 777     }
 778
 779 done_cycle:
 780     first = TRUE;
 781
 782     screen_desktop_popup(0, FALSE);
 783
 784     return d;
 785 }
 786
 787 void screen_update_layout()
 788 {
 789     ObOrientation orient;
 790     ObCorner corner;
 791     guint rows;
 792     guint cols;
 793     guint32 *data;
 794     guint num;
 795     gboolean valid = FALSE;
 796
 797     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 798                     net_desktop_layout, cardinal, &data, &num)) {
 799         if (num == 3 || num == 4) {
 800
 801             if (data[0] == prop_atoms.net_wm_orientation_vert)
 802                 orient = OB_ORIENTATION_VERT;
 803             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 804                 orient = OB_ORIENTATION_HORZ;
 805             else
 806                 goto screen_update_layout_bail;
 807
 808             if (num < 4)
 809                 corner = OB_CORNER_TOPLEFT;
 810             else {
 811                 if (data[3] == prop_atoms.net_wm_topleft)
 812                     corner = OB_CORNER_TOPLEFT;
 813                 else if (data[3] == prop_atoms.net_wm_topright)
 814                     corner = OB_CORNER_TOPRIGHT;
 815                 else if (data[3] == prop_atoms.net_wm_bottomright)
 816                     corner = OB_CORNER_BOTTOMRIGHT;
 817                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 818                     corner = OB_CORNER_BOTTOMLEFT;
 819                 else
 820                     goto screen_update_layout_bail;
 821             }
 822
 823             cols = data[1];
 824             rows = data[2];
 825
 826             /* fill in a zero rows/columns */
 827             if ((cols == 0 && rows == 0)) { /* both 0's is bad data.. */
 828                 goto screen_update_layout_bail;
 829             } else {
 830                 if (cols == 0) {
 831                     cols = screen_num_desktops / rows;
 832                     if (rows * cols < screen_num_desktops)
 833                         cols++;
 834                     if (rows * cols >= screen_num_desktops + cols)
 835                         rows--;
 836                 } else if (rows == 0) {
 837                     rows = screen_num_desktops / cols;
 838                     if (cols * rows < screen_num_desktops)
 839                         rows++;
 840                     if (cols * rows >= screen_num_desktops + rows)
 841                         cols--;
 842                 }
 843             }
 844
 845             /* bounds checking */
 846             if (orient == OB_ORIENTATION_HORZ) {
 847                 cols = MIN(screen_num_desktops, cols);
 848                 rows = MIN(rows, (screen_num_desktops + cols - 1) / cols);
 849                 cols = screen_num_desktops / rows +
 850                     !!(screen_num_desktops % rows);
 851             } else {
 852                 rows = MIN(screen_num_desktops, rows);
 853                 cols = MIN(cols, (screen_num_desktops + rows - 1) / rows);
 854                 rows = screen_num_desktops / cols +
 855                     !!(screen_num_desktops % cols);
 856             }
 857
 858             valid = TRUE;
 859         }
 860     screen_update_layout_bail:
 861         g_free(data);
 862     }
 863
 864     if (!valid) {
 865         /* defaults */
 866         orient = OB_ORIENTATION_HORZ;
 867         corner = OB_CORNER_TOPLEFT;
 868         rows = 1;
 869         cols = screen_num_desktops;
 870     }
 871
 872     screen_desktop_layout.orientation = orient;
 873     screen_desktop_layout.start_corner = corner;
 874     screen_desktop_layout.rows = rows;
 875     screen_desktop_layout.columns = cols;
 876 }
 877
 878 void screen_update_desktop_names()
 879 {
 880     guint i;
 881
 882     /* empty the array */
 883     g_strfreev(screen_desktop_names);
 884     screen_desktop_names = NULL;
 885
 886     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 887                    net_desktop_names, utf8, &screen_desktop_names))
 888         for (i = 0; screen_desktop_names[i] && i < screen_num_desktops; ++i);
 889     else
 890         i = 0;
 891     if (i < screen_num_desktops) {
 892         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
 893                                        screen_num_desktops + 1);
 894         screen_desktop_names[screen_num_desktops] = NULL;
 895         for (; i < screen_num_desktops; ++i)
 896             screen_desktop_names[i] = g_strdup_printf("desktop %i", i + 1);
 897     }
 898
 899     /* resize the pager for these names */
 900     pager_popup_text_width_to_strings(desktop_cycle_popup,
 901                                       screen_desktop_names,
 902                                       screen_num_desktops);
 903 }
 904
 905 void screen_show_desktop(gboolean show, gboolean restore_focus)
 906 {
 907     GList *it;
 908
 909     if (show == screen_showing_desktop) return; /* no change */
 910
 911     screen_showing_desktop = show;
 912
 913     if (show) {
 914         /* bottom to top */
 915         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 916             if (WINDOW_IS_CLIENT(it->data)) {
 917                 ObClient *client = it->data;
 918                 client_showhide(client);
 919             }
 920         }
 921     } else {
 922         /* top to bottom */
 923         for (it = stacking_list; it; it = g_list_next(it)) {
 924             if (WINDOW_IS_CLIENT(it->data)) {
 925                 ObClient *client = it->data;
 926                 client_showhide(client);
 927             }
 928         }
 929     }
 930
 931     if (show) {
 932         /* focus desktop */
 933         for (it = focus_order; it; it = g_list_next(it)) {
 934             ObClient *c = it->data;
 935             if (c->type == OB_CLIENT_TYPE_DESKTOP &&
 936                 (c->desktop == screen_desktop || c->desktop == DESKTOP_ALL) &&
 937                 client_focus(it->data))
 938                 break;
 939         }
 940     } else if (restore_focus) {
 941         ObClient *c;
 942
 943         /* use NULL for the "old" argument because the desktop was focused
 944            and we don't want to fallback to the desktop by default */
 945         if ((c = focus_fallback_target(TRUE, NULL)))
 946             client_focus(c);
 947     }
 948
 949     show = !!show; /* make it boolean */
 950     PROP_SET32(RootWindow(ob_display, ob_screen),
 951                net_showing_desktop, cardinal, show);
 952 }
 953
 954 void screen_install_colormap(ObClient *client, gboolean install)
 955 {
 956     if (client == NULL) {
 957         if (install)
 958             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 959         else
 960             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 961     } else {
 962         xerror_set_ignore(TRUE);
 963         if (install) {
 964             if (client->colormap != None)
 965                 XInstallColormap(RrDisplay(ob_rr_inst), client->colormap);
 966         } else
 967             XUninstallColormap(RrDisplay(ob_rr_inst), client->colormap);
 968         xerror_set_ignore(FALSE);
 969     }
 970 }
 971
 972 static inline void
 973 screen_area_add_strut_left(const StrutPartial *s, const Rect *monitor_area,
 974                            gint edge, Strut *ret)
 975 {
 976     if (s->left &&
 977         ((s->left_end <= s->left_start) ||
 978          (RECT_TOP(*monitor_area) < s->left_end &&
 979           RECT_BOTTOM(*monitor_area) > s->left_start)))
 980         ret->left = MAX(ret->left, edge);
 981 }
 982
 983 static inline void
 984 screen_area_add_strut_top(const StrutPartial *s, const Rect *monitor_area,
 985                           gint edge, Strut *ret)
 986 {
 987     if (s->top &&
 988         ((s->top_end <= s->top_start) ||
 989          (RECT_LEFT(*monitor_area) < s->top_end &&
 990           RECT_RIGHT(*monitor_area) > s->top_start)))
 991         ret->top = MAX(ret->top, edge);
 992 }
 993
 994 static inline void
 995 screen_area_add_strut_right(const StrutPartial *s, const Rect *monitor_area,
 996                             gint edge, Strut *ret)
 997 {
 998     if (s->right &&
 999         ((s->right_end <= s->right_start) ||
1000          (RECT_TOP(*monitor_area) < s->right_end &&
1001           RECT_BOTTOM(*monitor_area) > s->right_start)))
1002         ret->right = MAX(ret->right, edge);
1003 }
1004
1005 static inline void
1006 screen_area_add_strut_bottom(const StrutPartial *s, const Rect *monitor_area,
1007                              gint edge, Strut *ret)
1008 {
1009     if (s->bottom &&
1010         ((s->bottom_end <= s->bottom_start) ||
1011          (RECT_LEFT(*monitor_area) < s->bottom_end &&
1012           RECT_RIGHT(*monitor_area) > s->bottom_start)))
1013         ret->bottom = MAX(ret->bottom, edge);
1014 }
1015
1016 void screen_update_areas()
1017 {
1018     guint i, x;
1019     gulong *dims;
1020     GList *it;
1021     gint o;
1022
1023     g_free(monitor_area);
1024     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
1025
1026     if (area) {
1027         for (i = 0; area[i]; ++i)
1028             g_free(area[i]);
1029         g_free(area);
1030     }
1031
1032     area = g_new(Rect*, screen_num_desktops + 2);
1033     for (i = 0; i < screen_num_desktops + 1; ++i)
1034         area[i] = g_new0(Rect, screen_num_monitors + 1);
1035     area[i] = NULL;
1036
1037     dims = g_new(gulong, 4 * screen_num_desktops);
1038
1039     for (i = 0; i < screen_num_desktops + 1; ++i) {
1040         Strut *struts;
1041         gint l, r, t, b;
1042
1043         struts = g_new0(Strut, screen_num_monitors);
1044
1045         /* calc the xinerama areas */
1046         for (x = 0; x < screen_num_monitors; ++x) {
1047             area[i][x] = monitor_area[x];
1048             if (x == 0) {
1049                 l = monitor_area[x].x;
1050                 t = monitor_area[x].y;
1051                 r = monitor_area[x].x + monitor_area[x].width - 1;
1052                 b = monitor_area[x].y + monitor_area[x].height - 1;
1053             } else {
1054                 l = MIN(l, monitor_area[x].x);
1055                 t = MIN(t, monitor_area[x].y);
1056                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
1057                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
1058             }
1059         }
1060         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
1061
1062         /* apply the struts */
1063
1064         /* find the left-most xin heads, i do this in 2 loops :| */
1065         o = area[i][0].x;
1066         for (x = 1; x < screen_num_monitors; ++x)
1067             o = MIN(o, area[i][x].x);
1068
1069         for (x = 0; x < screen_num_monitors; ++x) {
1070             for (it = client_list; it; it = g_list_next(it)) {
1071                 ObClient *c = it->data;
1072                 screen_area_add_strut_left(&c->strut,
1073                                            &monitor_area[x],
1074                                            o + c->strut.left - area[i][x].x,
1075                                            &struts[x]);
1076             }
1077             screen_area_add_strut_left(&dock_strut,
1078                                        &monitor_area[x],
1079                                        o + dock_strut.left - area[i][x].x,
1080                                        &struts[x]);
1081
1082             area[i][x].x += struts[x].left;
1083             area[i][x].width -= struts[x].left;
1084         }
1085
1086         /* find the top-most xin heads, i do this in 2 loops :| */
1087         o = area[i][0].y;
1088         for (x = 1; x < screen_num_monitors; ++x)
1089             o = MIN(o, area[i][x].y);
1090
1091         for (x = 0; x < screen_num_monitors; ++x) {
1092             for (it = client_list; it; it = g_list_next(it)) {
1093                 ObClient *c = it->data;
1094                 screen_area_add_strut_top(&c->strut,
1095                                            &monitor_area[x],
1096                                            o + c->strut.top - area[i][x].y,
1097                                            &struts[x]);
1098             }
1099             screen_area_add_strut_top(&dock_strut,
1100                                       &monitor_area[x],
1101                                       o + dock_strut.top - area[i][x].y,
1102                                       &struts[x]);
1103
1104             area[i][x].y += struts[x].top;
1105             area[i][x].height -= struts[x].top;
1106         }
1107
1108         /* find the right-most xin heads, i do this in 2 loops :| */
1109         o = area[i][0].x + area[i][0].width - 1;
1110         for (x = 1; x < screen_num_monitors; ++x)
1111             o = MAX(o, area[i][x].x + area[i][x].width - 1);
1112
1113         for (x = 0; x < screen_num_monitors; ++x) {
1114             for (it = client_list; it; it = g_list_next(it)) {
1115                 ObClient *c = it->data;
1116                 screen_area_add_strut_right(&c->strut,
1117                                            &monitor_area[x],
1118                                            (area[i][x].x +
1119                                             area[i][x].width - 1) -
1120                                             (o - c->strut.right),
1121                                             &struts[x]);
1122             }
1123             screen_area_add_strut_right(&dock_strut,
1124                                         &monitor_area[x],
1125                                         (area[i][x].x +
1126                                          area[i][x].width - 1) -
1127                                         (o - dock_strut.right),
1128                                         &struts[x]);
1129
1130             area[i][x].width -= struts[x].right;
1131         }
1132
1133         /* find the bottom-most xin heads, i do this in 2 loops :| */
1134         o = area[i][0].y + area[i][0].height - 1;
1135         for (x = 1; x < screen_num_monitors; ++x)
1136             o = MAX(o, area[i][x].y + area[i][x].height - 1);
1137
1138         for (x = 0; x < screen_num_monitors; ++x) {
1139             for (it = client_list; it; it = g_list_next(it)) {
1140                 ObClient *c = it->data;
1141                 screen_area_add_strut_bottom(&c->strut,
1142                                              &monitor_area[x],
1143                                              (area[i][x].y +
1144                                               area[i][x].height - 1) - \
1145                                              (o - c->strut.bottom),
1146                                              &struts[x]);
1147             }
1148             screen_area_add_strut_bottom(&dock_strut,
1149                                          &monitor_area[x],
1150                                          (area[i][x].y +
1151                                           area[i][x].height - 1) - \
1152                                          (o - dock_strut.bottom),
1153                                          &struts[x]);
1154
1155             area[i][x].height -= struts[x].bottom;
1156         }
1157
1158         l = RECT_LEFT(area[i][0]);
1159         t = RECT_TOP(area[i][0]);
1160         r = RECT_RIGHT(area[i][0]);
1161         b = RECT_BOTTOM(area[i][0]);
1162         for (x = 1; x < screen_num_monitors; ++x) {
1163             l = MIN(l, RECT_LEFT(area[i][x]));
1164             t = MIN(l, RECT_TOP(area[i][x]));
1165             r = MAX(r, RECT_RIGHT(area[i][x]));
1166             b = MAX(b, RECT_BOTTOM(area[i][x]));
1167         }
1168         RECT_SET(area[i][screen_num_monitors], l, t,
1169                  r - l + 1, b - t + 1);
1170
1171         /* XXX optimize when this is run? */
1172
1173         /* the area has changed, adjust all the maximized
1174            windows */
1175         for (it = client_list; it; it = g_list_next(it)) {
1176             ObClient *c = it->data;
1177             if (i < screen_num_desktops) {
1178                 if (c->desktop == i)
1179                     client_reconfigure(c);
1180             } else if (c->desktop == DESKTOP_ALL)
1181                 client_reconfigure(c);
1182         }
1183         if (i < screen_num_desktops) {
1184             /* don't set these for the 'all desktops' area */
1185             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1186             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1187             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1188             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1189         }
1190
1191         g_free(struts);
1192     }
1193
1194     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1195                 dims, 4 * screen_num_desktops);
1196
1197     g_free(dims);
1198 }
1199
1200 Rect *screen_area(guint desktop)
1201 {
1202     return screen_area_monitor(desktop, screen_num_monitors);
1203 }
1204
1205 Rect *screen_area_monitor(guint desktop, guint head)
1206 {
1207     if (head > screen_num_monitors)
1208         return NULL;
1209     if (desktop >= screen_num_desktops) {
1210         if (desktop == DESKTOP_ALL)
1211             return &area[screen_num_desktops][head];
1212         return NULL;
1213     }
1214     return &area[desktop][head];
1215 }
1216
1217 guint screen_find_monitor(Rect *search)
1218 {
1219     guint i;
1220     guint most = 0;
1221     guint mostv = 0;
1222
1223     for (i = 0; i < screen_num_monitors; ++i) {
1224         Rect *area = screen_physical_area_monitor(i);
1225         if (RECT_INTERSECTS_RECT(*area, *search)) {
1226             Rect r;
1227             guint v;
1228
1229             RECT_SET_INTERSECTION(r, *area, *search);
1230             v = r.width * r.height;
1231
1232             if (v > mostv) {
1233                 mostv = v;
1234                 most = i;
1235             }
1236         }
1237     }
1238     return most;
1239 }
1240
1241 Rect *screen_physical_area()
1242 {
1243     return screen_physical_area_monitor(screen_num_monitors);
1244 }
1245
1246 Rect *screen_physical_area_monitor(guint head)
1247 {
1248     if (head > screen_num_monitors)
1249         return NULL;
1250     return &monitor_area[head];
1251 }
1252
1253 void screen_set_root_cursor()
1254 {
1255     if (sn_app_starting())
1256         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1257                       ob_cursor(OB_CURSOR_BUSY));
1258     else
1259         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1260                       ob_cursor(OB_CURSOR_POINTER));
1261 }
1262
1263 gboolean screen_pointer_pos(gint *x, gint *y)
1264 {
1265     Window w;
1266     gint i;
1267     guint u;
1268
1269     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1270                            &w, &w, x, y, &i, &i, &u);
1271 }