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