Dogcows Code - chaz/openbox/blob - 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()
 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
 174     if (!replace_wm()) {
 175         XDestroyWindow(ob_display, screen_support_win);
 176         return FALSE;
 177     }
 178
 179     xerror_set_ignore(TRUE);
 180     xerror_occured = FALSE;
 181     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 182                  ROOT_EVENTMASK);
 183     xerror_set_ignore(FALSE);
 184     if (xerror_occured) {
 185         g_message(_("A window manager is already running on screen %d"),
 186                   ob_screen);
 187
 188         XDestroyWindow(ob_display, screen_support_win);
 189         return FALSE;
 190     }
 191
 192
 193     screen_set_root_cursor();
 194
 195     /* set the OPENBOX_PID hint */
 196     pid = getpid();
 197     PROP_SET32(RootWindow(ob_display, ob_screen),
 198                openbox_pid, cardinal, pid);
 199
 200     /* set supporting window */
 201     PROP_SET32(RootWindow(ob_display, ob_screen),
 202                net_supporting_wm_check, window, screen_support_win);
 203
 204     /* set properties on the supporting window */
 205     PROP_SETS(screen_support_win, net_wm_name, "Openbox");
 206     PROP_SET32(screen_support_win, net_supporting_wm_check,
 207                window, screen_support_win);
 208
 209     /* set the _NET_SUPPORTED_ATOMS hint */
 210
 211     /* this is all the atoms after net_supported in the prop_atoms struct */
 212     prop_atoms_start = (Atom*)&prop_atoms;
 213     wm_supported_pos = (Atom*)&(prop_atoms.net_supported);
 214     num_support = sizeof(prop_atoms) / sizeof(Atom) -
 215         (wm_supported_pos - prop_atoms_start) - 1;
 216     i = 0;
 217     supported = g_new(gulong, num_support);
 218     supported[i++] = prop_atoms.net_supporting_wm_check;
 219     supported[i++] = prop_atoms.net_wm_full_placement;
 220     supported[i++] = prop_atoms.net_current_desktop;
 221     supported[i++] = prop_atoms.net_number_of_desktops;
 222     supported[i++] = prop_atoms.net_desktop_geometry;
 223     supported[i++] = prop_atoms.net_desktop_viewport;
 224     supported[i++] = prop_atoms.net_active_window;
 225     supported[i++] = prop_atoms.net_workarea;
 226     supported[i++] = prop_atoms.net_client_list;
 227     supported[i++] = prop_atoms.net_client_list_stacking;
 228     supported[i++] = prop_atoms.net_desktop_names;
 229     supported[i++] = prop_atoms.net_close_window;
 230     supported[i++] = prop_atoms.net_desktop_layout;
 231     supported[i++] = prop_atoms.net_showing_desktop;
 232     supported[i++] = prop_atoms.net_wm_name;
 233     supported[i++] = prop_atoms.net_wm_visible_name;
 234     supported[i++] = prop_atoms.net_wm_icon_name;
 235     supported[i++] = prop_atoms.net_wm_visible_icon_name;
 236     supported[i++] = prop_atoms.net_wm_desktop;
 237     supported[i++] = prop_atoms.net_wm_strut;
 238     supported[i++] = prop_atoms.net_wm_strut_partial;
 239     supported[i++] = prop_atoms.net_wm_icon;
 240     supported[i++] = prop_atoms.net_wm_icon_geometry;
 241     supported[i++] = prop_atoms.net_wm_window_type;
 242     supported[i++] = prop_atoms.net_wm_window_type_desktop;
 243     supported[i++] = prop_atoms.net_wm_window_type_dock;
 244     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
 245     supported[i++] = prop_atoms.net_wm_window_type_menu;
 246     supported[i++] = prop_atoms.net_wm_window_type_utility;
 247     supported[i++] = prop_atoms.net_wm_window_type_splash;
 248     supported[i++] = prop_atoms.net_wm_window_type_dialog;
 249     supported[i++] = prop_atoms.net_wm_window_type_normal;
 250     supported[i++] = prop_atoms.net_wm_allowed_actions;
 251     supported[i++] = prop_atoms.net_wm_action_move;
 252     supported[i++] = prop_atoms.net_wm_action_resize;
 253     supported[i++] = prop_atoms.net_wm_action_minimize;
 254     supported[i++] = prop_atoms.net_wm_action_shade;
 255     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
 256     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
 257     supported[i++] = prop_atoms.net_wm_action_fullscreen;
 258     supported[i++] = prop_atoms.net_wm_action_change_desktop;
 259     supported[i++] = prop_atoms.net_wm_action_close;
 260     supported[i++] = prop_atoms.net_wm_state;
 261     supported[i++] = prop_atoms.net_wm_state_modal;
 262     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
 263     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
 264     supported[i++] = prop_atoms.net_wm_state_shaded;
 265     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
 266     supported[i++] = prop_atoms.net_wm_state_skip_pager;
 267     supported[i++] = prop_atoms.net_wm_state_hidden;
 268     supported[i++] = prop_atoms.net_wm_state_fullscreen;
 269     supported[i++] = prop_atoms.net_wm_state_above;
 270     supported[i++] = prop_atoms.net_wm_state_below;
 271     supported[i++] = prop_atoms.net_wm_state_demands_attention;
 272     supported[i++] = prop_atoms.net_moveresize_window;
 273     supported[i++] = prop_atoms.net_wm_moveresize;
 274     supported[i++] = prop_atoms.net_wm_user_time;
 275     supported[i++] = prop_atoms.net_frame_extents;
 276     supported[i++] = prop_atoms.net_startup_id;
 277 #ifdef SYNC
 278     supported[i++] = prop_atoms.net_wm_sync_request;
 279     supported[i++] = prop_atoms.net_wm_sync_request_counter;
 280 #endif
 281
 282     supported[i++] = prop_atoms.kde_wm_change_state;
 283     supported[i++] = prop_atoms.kde_net_wm_frame_strut;
 284     supported[i++] = prop_atoms.kde_net_wm_window_type_override;
 285
 286     supported[i++] = prop_atoms.openbox_wm_state_undecorated;
 287     supported[i++] = prop_atoms.openbox_pid;
 288     supported[i++] = prop_atoms.openbox_config;
 289     supported[i++] = prop_atoms.openbox_control;
 290     g_assert(i == num_support);
 291
 292     PROP_SETA32(RootWindow(ob_display, ob_screen),
 293                 net_supported, atom, supported, num_support);
 294     g_free(supported);
 295
 296     return TRUE;
 297 }
 298
 299 void screen_startup(gboolean reconfig)
 300 {
 301     GSList *it;
 302     guint i;
 303
 304     desktop_cycle_popup = pager_popup_new(FALSE);
 305
 306     if (!reconfig)
 307         /* get the initial size */
 308         screen_resize();
 309
 310     /* set the names */
 311     screen_desktop_names = g_new(gchar*,
 312                                  g_slist_length(config_desktops_names) + 1);
 313     for (i = 0, it = config_desktops_names; it; ++i, it = g_slist_next(it))
 314         screen_desktop_names[i] = it->data; /* dont strdup */
 315     screen_desktop_names[i] = NULL;
 316     PROP_SETSS(RootWindow(ob_display, ob_screen),
 317                net_desktop_names, screen_desktop_names);
 318     g_free(screen_desktop_names); /* dont free the individual strings */
 319     screen_desktop_names = NULL;
 320
 321     if (!reconfig)
 322         screen_num_desktops = 0;
 323     screen_set_num_desktops(config_desktops_num);
 324     if (!reconfig) {
 325         guint32 d;
 326         /* start on the current desktop when a wm was already running */
 327         if (PROP_GET32(RootWindow(ob_display, ob_screen),
 328                        net_current_desktop, cardinal, &d) &&
 329             d < screen_num_desktops)
 330         {
 331             screen_set_desktop(d);
 332         } else if (session_desktop >= 0)
 333             screen_set_desktop(MIN((guint)session_desktop,
 334                                    screen_num_desktops));
 335         else
 336             screen_set_desktop(MIN(config_screen_firstdesk,
 337                                    screen_num_desktops) - 1);
 338
 339         /* don't start in showing-desktop mode */
 340         screen_showing_desktop = FALSE;
 341         PROP_SET32(RootWindow(ob_display, ob_screen),
 342                    net_showing_desktop, cardinal, screen_showing_desktop);
 343
 344         screen_update_layout();
 345     }
 346 }
 347
 348 void screen_shutdown(gboolean reconfig)
 349 {
 350     Rect **r;
 351
 352     pager_popup_free(desktop_cycle_popup);
 353
 354     if (!reconfig) {
 355         XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 356                      NoEventMask);
 357
 358         /* we're not running here no more! */
 359         PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 360         /* not without us */
 361         PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 362         /* don't keep this mode */
 363         PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 364
 365         XDestroyWindow(ob_display, screen_support_win);
 366     }
 367
 368     g_strfreev(screen_desktop_names);
 369     screen_desktop_names = NULL;
 370     for (r = area; *r; ++r)
 371         g_free(*r);
 372     g_free(area);
 373     area = NULL;
 374 }
 375
 376 void screen_resize()
 377 {
 378     static gint oldw = 0, oldh = 0;
 379     gint w, h;
 380     GList *it;
 381     gulong geometry[2];
 382
 383     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 384     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 385
 386     if (w == oldw && h == oldh) return;
 387
 388     oldw = w; oldh = h;
 389
 390     /* Set the _NET_DESKTOP_GEOMETRY hint */
 391     screen_physical_size.width = geometry[0] = w;
 392     screen_physical_size.height = geometry[1] = h;
 393     PROP_SETA32(RootWindow(ob_display, ob_screen),
 394                 net_desktop_geometry, cardinal, geometry, 2);
 395
 396     if (ob_state() == OB_STATE_STARTING)
 397         return;
 398
 399     screen_update_areas();
 400     dock_configure();
 401
 402     for (it = client_list; it; it = g_list_next(it))
 403         client_move_onscreen(it->data, FALSE);
 404 }
 405
 406 void screen_set_num_desktops(guint num)
 407 {
 408     guint old;
 409     gulong *viewport;
 410     GList *it;
 411
 412     g_assert(num > 0);
 413
 414     if (screen_num_desktops == num) return;
 415
 416     old = screen_num_desktops;
 417     screen_num_desktops = num;
 418     PROP_SET32(RootWindow(ob_display, ob_screen),
 419                net_number_of_desktops, cardinal, num);
 420
 421     /* set the viewport hint */
 422     viewport = g_new0(gulong, num * 2);
 423     PROP_SETA32(RootWindow(ob_display, ob_screen),
 424                 net_desktop_viewport, cardinal, viewport, num * 2);
 425     g_free(viewport);
 426
 427     /* the number of rows/columns will differ */
 428     screen_update_layout();
 429
 430     /* may be some unnamed desktops that we need to fill in with names */
 431     screen_update_desktop_names();
 432
 433     /* move windows on desktops that will no longer exist! */
 434     for (it = client_list; it; it = g_list_next(it)) {
 435         ObClient *c = it->data;
 436         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 437             client_set_desktop(c, num - 1, FALSE);
 438     }
 439
 440     /* change our struts/area to match (after moving windows) */
 441     screen_update_areas();
 442
 443     /* change our desktop if we're on one that no longer exists! */
 444     if (screen_desktop >= screen_num_desktops)
 445         screen_set_desktop(num - 1);
 446 }
 447
 448 void screen_set_desktop(guint num)
 449 {
 450     ObClient *c;
 451     GList *it;
 452     guint old;
 453
 454     g_assert(num < screen_num_desktops);
 455
 456     old = screen_desktop;
 457     screen_desktop = num;
 458     PROP_SET32(RootWindow(ob_display, ob_screen),
 459                net_current_desktop, cardinal, num);
 460
 461     if (old == num) return;
 462
 463     screen_last_desktop = old;
 464
 465     ob_debug("Moving to desktop %d\n", num+1);
 466
 467     if (moveresize_client)
 468         client_set_desktop(moveresize_client, num, TRUE);
 469
 470     /* show windows before hiding the rest to lessen the enter/leave events */
 471
 472     /* show/hide windows from top to bottom */
 473     for (it = stacking_list; it; it = g_list_next(it)) {
 474         if (WINDOW_IS_CLIENT(it->data)) {
 475             ObClient *c = it->data;
 476             client_show(c);
 477         }
 478     }
 479
 480     /* hide windows from bottom to top */
 481     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 482         if (WINDOW_IS_CLIENT(it->data)) {
 483             ObClient *c = it->data;
 484             client_hide(c);
 485         }
 486     }
 487
 488     /* have to try focus here because when you leave an empty desktop
 489        there is no focus out to watch for */
 490     if ((c = focus_fallback_target(TRUE, focus_client))) {
 491         /* reduce flicker by hiliting now rather than waiting for the server
 492            FocusIn event */
 493         frame_adjust_focus(c->frame, TRUE);
 494         client_focus(c);
 495     }
 496
 497     event_ignore_queued_enters();
 498
 499     if (event_curtime != CurrentTime)
 500         screen_desktop_user_time = event_curtime;
 501 }
 502
 503 static void get_row_col(guint d, guint *r, guint *c)
 504 {
 505     switch (screen_desktop_layout.orientation) {
 506     case OB_ORIENTATION_HORZ:
 507         switch (screen_desktop_layout.start_corner) {
 508         case OB_CORNER_TOPLEFT:
 509             *r = d / screen_desktop_layout.columns;
 510             *c = d % screen_desktop_layout.columns;
 511             break;
 512         case OB_CORNER_BOTTOMLEFT:
 513             *r = screen_desktop_layout.rows - 1 -
 514                 d / screen_desktop_layout.columns;
 515             *c = d % screen_desktop_layout.columns;
 516             break;
 517         case OB_CORNER_TOPRIGHT:
 518             *r = d / screen_desktop_layout.columns;
 519             *c = screen_desktop_layout.columns - 1 -
 520                 d % screen_desktop_layout.columns;
 521             break;
 522         case OB_CORNER_BOTTOMRIGHT:
 523             *r = screen_desktop_layout.rows - 1 -
 524                 d / screen_desktop_layout.columns;
 525             *c = screen_desktop_layout.columns - 1 -
 526                 d % screen_desktop_layout.columns;
 527             break;
 528         }
 529         break;
 530     case OB_ORIENTATION_VERT:
 531         switch (screen_desktop_layout.start_corner) {
 532         case OB_CORNER_TOPLEFT:
 533             *r = d % screen_desktop_layout.rows;
 534             *c = d / screen_desktop_layout.rows;
 535             break;
 536         case OB_CORNER_BOTTOMLEFT:
 537             *r = screen_desktop_layout.rows - 1 -
 538                 d % screen_desktop_layout.rows;
 539             *c = d / screen_desktop_layout.rows;
 540             break;
 541         case OB_CORNER_TOPRIGHT:
 542             *r = d % screen_desktop_layout.rows;
 543             *c = screen_desktop_layout.columns - 1 -
 544                 d / screen_desktop_layout.rows;
 545             break;
 546         case OB_CORNER_BOTTOMRIGHT:
 547             *r = screen_desktop_layout.rows - 1 -
 548                 d % screen_desktop_layout.rows;
 549             *c = screen_desktop_layout.columns - 1 -
 550                 d / screen_desktop_layout.rows;
 551             break;
 552         }
 553         break;
 554     }
 555 }
 556
 557 static guint translate_row_col(guint r, guint c)
 558 {
 559     switch (screen_desktop_layout.orientation) {
 560     case OB_ORIENTATION_HORZ:
 561         switch (screen_desktop_layout.start_corner) {
 562         case OB_CORNER_TOPLEFT:
 563             return r % screen_desktop_layout.rows *
 564                 screen_desktop_layout.columns +
 565                 c % screen_desktop_layout.columns;
 566         case OB_CORNER_BOTTOMLEFT:
 567             return (screen_desktop_layout.rows - 1 -
 568                     r % screen_desktop_layout.rows) *
 569                 screen_desktop_layout.columns +
 570                 c % screen_desktop_layout.columns;
 571         case OB_CORNER_TOPRIGHT:
 572             return r % screen_desktop_layout.rows *
 573                 screen_desktop_layout.columns +
 574                 (screen_desktop_layout.columns - 1 -
 575                  c % screen_desktop_layout.columns);
 576         case OB_CORNER_BOTTOMRIGHT:
 577             return (screen_desktop_layout.rows - 1 -
 578                     r % screen_desktop_layout.rows) *
 579                 screen_desktop_layout.columns +
 580                 (screen_desktop_layout.columns - 1 -
 581                  c % screen_desktop_layout.columns);
 582         }
 583     case OB_ORIENTATION_VERT:
 584         switch (screen_desktop_layout.start_corner) {
 585         case OB_CORNER_TOPLEFT:
 586             return c % screen_desktop_layout.columns *
 587                 screen_desktop_layout.rows +
 588                 r % screen_desktop_layout.rows;
 589         case OB_CORNER_BOTTOMLEFT:
 590             return c % screen_desktop_layout.columns *
 591                 screen_desktop_layout.rows +
 592                 (screen_desktop_layout.rows - 1 -
 593                  r % screen_desktop_layout.rows);
 594         case OB_CORNER_TOPRIGHT:
 595             return (screen_desktop_layout.columns - 1 -
 596                     c % screen_desktop_layout.columns) *
 597                 screen_desktop_layout.rows +
 598                 r % screen_desktop_layout.rows;
 599         case OB_CORNER_BOTTOMRIGHT:
 600             return (screen_desktop_layout.columns - 1 -
 601                     c % screen_desktop_layout.columns) *
 602                 screen_desktop_layout.rows +
 603                 (screen_desktop_layout.rows - 1 -
 604                  r % screen_desktop_layout.rows);
 605         }
 606     }
 607     g_assert_not_reached();
 608     return 0;
 609 }
 610
 611 void screen_desktop_popup(guint d, gboolean show)
 612 {
 613     Rect *a;
 614
 615     if (!show) {
 616         pager_popup_hide(desktop_cycle_popup);
 617     } else {
 618         a = screen_physical_area_monitor(0);
 619         pager_popup_position(desktop_cycle_popup, CenterGravity,
 620                              a->x + a->width / 2, a->y + a->height / 2);
 621         pager_popup_width(desktop_cycle_popup, MAX(a->width/3, POPUP_WIDTH));
 622         pager_popup_height(desktop_cycle_popup, POPUP_HEIGHT);
 623
 624         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
 625     }
 626 }
 627
 628 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 629                            gboolean dialog, gboolean done, gboolean cancel)
 630 {
 631     static gboolean first = TRUE;
 632     static guint origd, d;
 633     guint r, c;
 634
 635     if (cancel) {
 636         d = origd;
 637         goto done_cycle;
 638     } else if (done && dialog) {
 639         goto done_cycle;
 640     }
 641     if (first) {
 642         first = FALSE;
 643         d = origd = screen_desktop;
 644     }
 645
 646     get_row_col(d, &r, &c);
 647
 648     if (linear) {
 649         switch (dir) {
 650         case OB_DIRECTION_EAST:
 651             if (d < screen_num_desktops - 1)
 652                 ++d;
 653             else if (wrap)
 654                 d = 0;
 655             break;
 656         case OB_DIRECTION_WEST:
 657             if (d > 0)
 658                 --d;
 659             else if (wrap)
 660                 d = screen_num_desktops - 1;
 661             break;
 662         default:
 663             assert(0);
 664             return screen_desktop;
 665         }
 666     } else {
 667         switch (dir) {
 668         case OB_DIRECTION_EAST:
 669             ++c;
 670             if (c >= screen_desktop_layout.columns) {
 671                 if (wrap) {
 672                     c = 0;
 673                 } else {
 674                     d = screen_desktop;
 675                     goto show_cycle_dialog;
 676                 }
 677             }
 678             d = translate_row_col(r, c);
 679             if (d >= screen_num_desktops) {
 680                 if (wrap) {
 681                     ++c;
 682                 } else {
 683                     d = screen_desktop;
 684                     goto show_cycle_dialog;
 685                 }
 686             }
 687             break;
 688         case OB_DIRECTION_WEST:
 689             --c;
 690             if (c >= screen_desktop_layout.columns) {
 691                 if (wrap) {
 692                     c = screen_desktop_layout.columns - 1;
 693                 } else {
 694                     d = screen_desktop;
 695                     goto show_cycle_dialog;
 696                 }
 697             }
 698             d = translate_row_col(r, c);
 699             if (d >= screen_num_desktops) {
 700                 if (wrap) {
 701                     --c;
 702                 } else {
 703                     d = screen_desktop;
 704                     goto show_cycle_dialog;
 705                 }
 706             }
 707             break;
 708         case OB_DIRECTION_SOUTH:
 709             ++r;
 710             if (r >= screen_desktop_layout.rows) {
 711                 if (wrap) {
 712                     r = 0;
 713                 } else {
 714                     d = screen_desktop;
 715                     goto show_cycle_dialog;
 716                 }
 717             }
 718             d = translate_row_col(r, c);
 719             if (d >= screen_num_desktops) {
 720                 if (wrap) {
 721                     ++r;
 722                 } else {
 723                     d = screen_desktop;
 724                     goto show_cycle_dialog;
 725                 }
 726             }
 727             break;
 728         case OB_DIRECTION_NORTH:
 729             --r;
 730             if (r >= screen_desktop_layout.rows) {
 731                 if (wrap) {
 732                     r = screen_desktop_layout.rows - 1;
 733                 } else {
 734                     d = screen_desktop;
 735                     goto show_cycle_dialog;
 736                 }
 737             }
 738             d = translate_row_col(r, c);
 739             if (d >= screen_num_desktops) {
 740                 if (wrap) {
 741                     --r;
 742                 } else {
 743                     d = screen_desktop;
 744                     goto show_cycle_dialog;
 745                 }
 746             }
 747             break;
 748         default:
 749             assert(0);
 750             return d = screen_desktop;
 751         }
 752
 753         d = translate_row_col(r, c);
 754     }
 755
 756 show_cycle_dialog:
 757     if (dialog) {
 758         screen_desktop_popup(d, TRUE);
 759         return d;
 760     }
 761
 762 done_cycle:
 763     first = TRUE;
 764
 765     screen_desktop_popup(0, FALSE);
 766
 767     return d;
 768 }
 769
 770 void screen_update_layout()
 771 {
 772     ObOrientation orient;
 773     ObCorner corner;
 774     guint rows;
 775     guint cols;
 776     guint32 *data;
 777     guint num;
 778     gboolean valid = FALSE;
 779
 780     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 781                     net_desktop_layout, cardinal, &data, &num)) {
 782         if (num == 3 || num == 4) {
 783
 784             if (data[0] == prop_atoms.net_wm_orientation_vert)
 785                 orient = OB_ORIENTATION_VERT;
 786             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 787                 orient = OB_ORIENTATION_HORZ;
 788             else
 789                 goto screen_update_layout_bail;
 790
 791             if (num < 4)
 792                 corner = OB_CORNER_TOPLEFT;
 793             else {
 794                 if (data[3] == prop_atoms.net_wm_topleft)
 795                     corner = OB_CORNER_TOPLEFT;
 796                 else if (data[3] == prop_atoms.net_wm_topright)
 797                     corner = OB_CORNER_TOPRIGHT;
 798                 else if (data[3] == prop_atoms.net_wm_bottomright)
 799                     corner = OB_CORNER_BOTTOMRIGHT;
 800                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 801                     corner = OB_CORNER_BOTTOMLEFT;
 802                 else
 803                     goto screen_update_layout_bail;
 804             }
 805
 806             cols = data[1];
 807             rows = data[2];
 808
 809             /* fill in a zero rows/columns */
 810             if ((cols == 0 && rows == 0)) { /* both 0's is bad data.. */
 811                 goto screen_update_layout_bail;
 812             } else {
 813                 if (cols == 0) {
 814                     cols = screen_num_desktops / rows;
 815                     if (rows * cols < screen_num_desktops)
 816                         cols++;
 817                     if (rows * cols >= screen_num_desktops + cols)
 818                         rows--;
 819                 } else if (rows == 0) {
 820                     rows = screen_num_desktops / cols;
 821                     if (cols * rows < screen_num_desktops)
 822                         rows++;
 823                     if (cols * rows >= screen_num_desktops + rows)
 824                         cols--;
 825                 }
 826             }
 827
 828             /* bounds checking */
 829             if (orient == OB_ORIENTATION_HORZ) {
 830                 cols = MIN(screen_num_desktops, cols);
 831                 rows = MIN(rows, (screen_num_desktops + cols - 1) / cols);
 832                 cols = screen_num_desktops / rows +
 833                     !!(screen_num_desktops % rows);
 834             } else {
 835                 rows = MIN(screen_num_desktops, rows);
 836                 cols = MIN(cols, (screen_num_desktops + rows - 1) / rows);
 837                 rows = screen_num_desktops / cols +
 838                     !!(screen_num_desktops % cols);
 839             }
 840
 841             valid = TRUE;
 842         }
 843     screen_update_layout_bail:
 844         g_free(data);
 845     }
 846
 847     if (!valid) {
 848         /* defaults */
 849         orient = OB_ORIENTATION_HORZ;
 850         corner = OB_CORNER_TOPLEFT;
 851         rows = 1;
 852         cols = screen_num_desktops;
 853     }
 854
 855     screen_desktop_layout.orientation = orient;
 856     screen_desktop_layout.start_corner = corner;
 857     screen_desktop_layout.rows = rows;
 858     screen_desktop_layout.columns = cols;
 859 }
 860
 861 void screen_update_desktop_names()
 862 {
 863     guint i;
 864
 865     /* empty the array */
 866     g_strfreev(screen_desktop_names);
 867     screen_desktop_names = NULL;
 868
 869     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 870                    net_desktop_names, utf8, &screen_desktop_names))
 871         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 872     else
 873         i = 0;
 874     if (i <= screen_num_desktops) {
 875         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
 876                                        screen_num_desktops + 1);
 877         screen_desktop_names[screen_num_desktops] = NULL;
 878         for (; i < screen_num_desktops; ++i)
 879             screen_desktop_names[i] = g_strdup_printf("Desktop %i", i + 1);
 880     }
 881 }
 882
 883 void screen_show_desktop(gboolean show, gboolean restore_focus)
 884 {
 885     GList *it;
 886
 887     if (show == screen_showing_desktop) return; /* no change */
 888
 889     screen_showing_desktop = show;
 890
 891     if (show) {
 892         /* bottom to top */
 893         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 894             if (WINDOW_IS_CLIENT(it->data)) {
 895                 ObClient *client = it->data;
 896                 client_showhide(client);
 897             }
 898         }
 899     } else {
 900         /* top to bottom */
 901         for (it = stacking_list; it; it = g_list_next(it)) {
 902             if (WINDOW_IS_CLIENT(it->data)) {
 903                 ObClient *client = it->data;
 904                 client_showhide(client);
 905             }
 906         }
 907     }
 908
 909     if (show) {
 910         /* focus desktop */
 911         for (it = focus_order; it; it = g_list_next(it)) {
 912             ObClient *c = it->data;
 913             if (c->type == OB_CLIENT_TYPE_DESKTOP &&
 914                 (c->desktop == screen_desktop || c->desktop == DESKTOP_ALL) &&
 915                 client_focus(it->data))
 916                 break;
 917         }
 918     } else if (restore_focus) {
 919         ObClient *c;
 920
 921         /* use NULL for the "old" argument because the desktop was focused
 922            and we don't want to fallback to the desktop by default */
 923         if ((c = focus_fallback_target(TRUE, NULL)))
 924             client_focus(c);
 925     }
 926
 927     show = !!show; /* make it boolean */
 928     PROP_SET32(RootWindow(ob_display, ob_screen),
 929                net_showing_desktop, cardinal, show);
 930 }
 931
 932 void screen_install_colormap(ObClient *client, gboolean install)
 933 {
 934     if (client == NULL) {
 935         if (install)
 936             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 937         else
 938             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 939     } else {
 940         xerror_set_ignore(TRUE);
 941         if (install) {
 942             if (client->colormap != None)
 943                 XInstallColormap(RrDisplay(ob_rr_inst), client->colormap);
 944         } else
 945             XUninstallColormap(RrDisplay(ob_rr_inst), client->colormap);
 946         xerror_set_ignore(FALSE);
 947     }
 948 }
 949
 950 static inline void
 951 screen_area_add_strut_left(const StrutPartial *s, const Rect *monitor_area,
 952                            gint edge, Strut *ret)
 953 {
 954     if (s->left &&
 955         ((s->left_end <= s->left_start) ||
 956          (RECT_TOP(*monitor_area) < s->left_end &&
 957           RECT_BOTTOM(*monitor_area) > s->left_start)))
 958         ret->left = MAX(ret->left, edge);
 959 }
 960
 961 static inline void
 962 screen_area_add_strut_top(const StrutPartial *s, const Rect *monitor_area,
 963                           gint edge, Strut *ret)
 964 {
 965     if (s->top &&
 966         ((s->top_end <= s->top_start) ||
 967          (RECT_LEFT(*monitor_area) < s->top_end &&
 968           RECT_RIGHT(*monitor_area) > s->top_start)))
 969         ret->top = MAX(ret->top, edge);
 970 }
 971
 972 static inline void
 973 screen_area_add_strut_right(const StrutPartial *s, const Rect *monitor_area,
 974                             gint edge, Strut *ret)
 975 {
 976     if (s->right &&
 977         ((s->right_end <= s->right_start) ||
 978          (RECT_TOP(*monitor_area) < s->right_end &&
 979           RECT_BOTTOM(*monitor_area) > s->right_start)))
 980         ret->right = MAX(ret->right, edge);
 981 }
 982
 983 static inline void
 984 screen_area_add_strut_bottom(const StrutPartial *s, const Rect *monitor_area,
 985                              gint edge, Strut *ret)
 986 {
 987     if (s->bottom &&
 988         ((s->bottom_end <= s->bottom_start) ||
 989          (RECT_LEFT(*monitor_area) < s->bottom_end &&
 990           RECT_RIGHT(*monitor_area) > s->bottom_start)))
 991         ret->bottom = MAX(ret->bottom, edge);
 992 }
 993
 994 void screen_update_areas()
 995 {
 996     guint i, x;
 997     gulong *dims;
 998     GList *it;
 999     gint o;
1000
1001     g_free(monitor_area);
1002     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
1003
1004     if (area) {
1005         for (i = 0; area[i]; ++i)
1006             g_free(area[i]);
1007         g_free(area);
1008     }
1009
1010     area = g_new(Rect*, screen_num_desktops + 2);
1011     for (i = 0; i < screen_num_desktops + 1; ++i)
1012         area[i] = g_new0(Rect, screen_num_monitors + 1);
1013     area[i] = NULL;
1014
1015     dims = g_new(gulong, 4 * screen_num_desktops);
1016
1017     for (i = 0; i < screen_num_desktops + 1; ++i) {
1018         Strut *struts;
1019         gint l, r, t, b;
1020
1021         struts = g_new0(Strut, screen_num_monitors);
1022
1023         /* calc the xinerama areas */
1024         for (x = 0; x < screen_num_monitors; ++x) {
1025             area[i][x] = monitor_area[x];
1026             if (x == 0) {
1027                 l = monitor_area[x].x;
1028                 t = monitor_area[x].y;
1029                 r = monitor_area[x].x + monitor_area[x].width - 1;
1030                 b = monitor_area[x].y + monitor_area[x].height - 1;
1031             } else {
1032                 l = MIN(l, monitor_area[x].x);
1033                 t = MIN(t, monitor_area[x].y);
1034                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
1035                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
1036             }
1037         }
1038         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
1039
1040         /* apply the struts */
1041
1042         /* find the left-most xin heads, i do this in 2 loops :| */
1043         o = area[i][0].x;
1044         for (x = 1; x < screen_num_monitors; ++x)
1045             o = MIN(o, area[i][x].x);
1046
1047         for (x = 0; x < screen_num_monitors; ++x) {
1048             for (it = client_list; it; it = g_list_next(it)) {
1049                 ObClient *c = it->data;
1050                 screen_area_add_strut_left(&c->strut,
1051                                            &monitor_area[x],
1052                                            o + c->strut.left - area[i][x].x,
1053                                            &struts[x]);
1054             }
1055             screen_area_add_strut_left(&dock_strut,
1056                                        &monitor_area[x],
1057                                        o + dock_strut.left - area[i][x].x,
1058                                        &struts[x]);
1059
1060             area[i][x].x += struts[x].left;
1061             area[i][x].width -= struts[x].left;
1062         }
1063
1064         /* find the top-most xin heads, i do this in 2 loops :| */
1065         o = area[i][0].y;
1066         for (x = 1; x < screen_num_monitors; ++x)
1067             o = MIN(o, area[i][x].y);
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_top(&c->strut,
1073                                            &monitor_area[x],
1074                                            o + c->strut.top - area[i][x].y,
1075                                            &struts[x]);
1076             }
1077             screen_area_add_strut_top(&dock_strut,
1078                                       &monitor_area[x],
1079                                       o + dock_strut.top - area[i][x].y,
1080                                       &struts[x]);
1081
1082             area[i][x].y += struts[x].top;
1083             area[i][x].height -= struts[x].top;
1084         }
1085
1086         /* find the right-most xin heads, i do this in 2 loops :| */
1087         o = area[i][0].x + area[i][0].width - 1;
1088         for (x = 1; x < screen_num_monitors; ++x)
1089             o = MAX(o, area[i][x].x + area[i][x].width - 1);
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_right(&c->strut,
1095                                            &monitor_area[x],
1096                                            (area[i][x].x +
1097                                             area[i][x].width - 1) -
1098                                             (o - c->strut.right),
1099                                             &struts[x]);
1100             }
1101             screen_area_add_strut_right(&dock_strut,
1102                                         &monitor_area[x],
1103                                         (area[i][x].x +
1104                                          area[i][x].width - 1) -
1105                                         (o - dock_strut.right),
1106                                         &struts[x]);
1107
1108             area[i][x].width -= struts[x].right;
1109         }
1110
1111         /* find the bottom-most xin heads, i do this in 2 loops :| */
1112         o = area[i][0].y + area[i][0].height - 1;
1113         for (x = 1; x < screen_num_monitors; ++x)
1114             o = MAX(o, area[i][x].y + area[i][x].height - 1);
1115
1116         for (x = 0; x < screen_num_monitors; ++x) {
1117             for (it = client_list; it; it = g_list_next(it)) {
1118                 ObClient *c = it->data;
1119                 screen_area_add_strut_bottom(&c->strut,
1120                                              &monitor_area[x],
1121                                              (area[i][x].y +
1122                                               area[i][x].height - 1) - \
1123                                              (o - c->strut.bottom),
1124                                              &struts[x]);
1125             }
1126             screen_area_add_strut_bottom(&dock_strut,
1127                                          &monitor_area[x],
1128                                          (area[i][x].y +
1129                                           area[i][x].height - 1) - \
1130                                          (o - dock_strut.bottom),
1131                                          &struts[x]);
1132
1133             area[i][x].height -= struts[x].bottom;
1134         }
1135
1136         l = RECT_LEFT(area[i][0]);
1137         t = RECT_TOP(area[i][0]);
1138         r = RECT_RIGHT(area[i][0]);
1139         b = RECT_BOTTOM(area[i][0]);
1140         for (x = 1; x < screen_num_monitors; ++x) {
1141             l = MIN(l, RECT_LEFT(area[i][x]));
1142             t = MIN(l, RECT_TOP(area[i][x]));
1143             r = MAX(r, RECT_RIGHT(area[i][x]));
1144             b = MAX(b, RECT_BOTTOM(area[i][x]));
1145         }
1146         RECT_SET(area[i][screen_num_monitors], l, t,
1147                  r - l + 1, b - t + 1);
1148
1149         /* XXX optimize when this is run? */
1150
1151         /* the area has changed, adjust all the maximized
1152            windows */
1153         for (it = client_list; it; it = g_list_next(it)) {
1154             ObClient *c = it->data;
1155             if (i < screen_num_desktops) {
1156                 if (c->desktop == i)
1157                     client_reconfigure(c);
1158             } else if (c->desktop == DESKTOP_ALL)
1159                 client_reconfigure(c);
1160         }
1161         if (i < screen_num_desktops) {
1162             /* don't set these for the 'all desktops' area */
1163             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1164             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1165             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1166             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1167         }
1168
1169         g_free(struts);
1170     }
1171
1172     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1173                 dims, 4 * screen_num_desktops);
1174
1175     g_free(dims);
1176 }
1177
1178 Rect *screen_area(guint desktop)
1179 {
1180     return screen_area_monitor(desktop, screen_num_monitors);
1181 }
1182
1183 Rect *screen_area_monitor(guint desktop, guint head)
1184 {
1185     if (head > screen_num_monitors)
1186         return NULL;
1187     if (desktop >= screen_num_desktops) {
1188         if (desktop == DESKTOP_ALL)
1189             return &area[screen_num_desktops][head];
1190         return NULL;
1191     }
1192     return &area[desktop][head];
1193 }
1194
1195 guint screen_find_monitor(Rect *search)
1196 {
1197     guint i;
1198     guint most = 0;
1199     guint mostv = 0;
1200
1201     for (i = 0; i < screen_num_monitors; ++i) {
1202         Rect *area = screen_physical_area_monitor(i);
1203         if (RECT_INTERSECTS_RECT(*area, *search)) {
1204             Rect r;
1205             guint v;
1206
1207             RECT_SET_INTERSECTION(r, *area, *search);
1208             v = r.width * r.height;
1209
1210             if (v > mostv) {
1211                 mostv = v;
1212                 most = i;
1213             }
1214         }
1215     }
1216     return most;
1217 }
1218
1219 Rect *screen_physical_area()
1220 {
1221     return screen_physical_area_monitor(screen_num_monitors);
1222 }
1223
1224 Rect *screen_physical_area_monitor(guint head)
1225 {
1226     if (head > screen_num_monitors)
1227         return NULL;
1228     return &monitor_area[head];
1229 }
1230
1231 void screen_set_root_cursor()
1232 {
1233     if (sn_app_starting())
1234         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1235                       ob_cursor(OB_CURSOR_BUSY));
1236     else
1237         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1238                       ob_cursor(OB_CURSOR_POINTER));
1239 }
1240
1241 gboolean screen_pointer_pos(gint *x, gint *y)
1242 {
1243     Window w;
1244     gint i;
1245     guint u;
1246
1247     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1248                            &w, &w, x, y, &i, &i, &u);
1249 }