screen.c 73.3 KB
Newer Older
1 2
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */

rhp's avatar
...  
rhp committed
3 4 5
/* Metacity X screen handler */

/* 
Havoc Pennington's avatar
Havoc Pennington committed
6
 * Copyright (C) 2001, 2002 Havoc Pennington
7
 * Copyright (C) 2002, 2003 Red Hat Inc.
Havoc Pennington's avatar
Havoc Pennington committed
8
 * Some ICCCM manager selection code derived from fvwm2,
9
 * Copyright (C) 2001 Dominik Vogt, Matthias Clasen, and fvwm2 team
10
 * Copyright (C) 2003 Rob Adams
11
 * Copyright (C) 2004-2006 Elijah Newren
rhp's avatar
...  
rhp committed
12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */
rhp's avatar
...  
rhp committed
28

29
#include <config.h>
rhp's avatar
...  
rhp committed
30 31
#include "screen.h"
#include "util.h"
rhp's avatar
...  
rhp committed
32
#include "errors.h"
rhp's avatar
...  
rhp committed
33
#include "window.h"
rhp's avatar
...  
rhp committed
34
#include "frame.h"
35
#include "prefs.h"
rhp's avatar
...  
rhp committed
36 37
#include "workspace.h"
#include "keybindings.h"
rhp's avatar
...  
rhp committed
38
#include "stack.h"
39
#include "xprops.h"
Havoc Pennington's avatar
Havoc Pennington committed
40
#include "compositor.h"
rhp's avatar
...  
rhp committed
41

42 43 44 45
#ifdef HAVE_SOLARIS_XINERAMA
#include <X11/extensions/xinerama.h>
#endif
#ifdef HAVE_XFREE_XINERAMA
46 47 48
#include <X11/extensions/Xinerama.h>
#endif

rhp's avatar
...  
rhp committed
49
#include <X11/Xatom.h>
rhp's avatar
...  
rhp committed
50 51
#include <locale.h>
#include <string.h>
Havoc Pennington's avatar
Havoc Pennington committed
52
#include <stdio.h>
rhp's avatar
...  
rhp committed
53

rhp's avatar
...  
rhp committed
54 55 56
static char* get_screen_name (MetaDisplay *display,
                              int          number);

57 58
static void update_num_workspaces  (MetaScreen *screen,
                                    guint32     timestamp);
59
static void update_focus_mode      (MetaScreen *screen);
60
static void set_workspace_names    (MetaScreen *screen);
61 62
static void prefs_changed_callback (MetaPreference pref,
                                    gpointer       data);
rhp's avatar
...  
rhp committed
63

64 65 66
static void set_desktop_geometry_hint (MetaScreen *screen);
static void set_desktop_viewport_hint (MetaScreen *screen);

67 68 69 70 71
#ifdef HAVE_STARTUP_NOTIFICATION
static void meta_screen_sn_event   (SnMonitorEvent *event,
                                    void           *user_data);
#endif

rhp's avatar
...  
rhp committed
72 73 74 75 76
static int
set_wm_check_hint (MetaScreen *screen)
{
  unsigned long data[1];

rhp's avatar
...  
rhp committed
77 78
  g_return_val_if_fail (screen->display->leader_window != None, 0);
  
rhp's avatar
...  
rhp committed
79 80 81 82 83 84
  data[0] = screen->display->leader_window;

  XChangeProperty (screen->display->xdisplay, screen->xroot,
                   screen->display->atom_net_supporting_wm_check,
                   XA_WINDOW,
                   32, PropModeReplace, (guchar*) data, 1);
rhp's avatar
...  
rhp committed
85

rhp's avatar
...  
rhp committed
86 87 88 89 90 91
  return Success;
}

static int
set_supported_hint (MetaScreen *screen)
{
92
#define N_SUPPORTED 58
rhp's avatar
...  
rhp committed
93
  Atom atoms[N_SUPPORTED];
rhp's avatar
...  
rhp committed
94
  
rhp's avatar
...  
rhp committed
95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111
  atoms[0] = screen->display->atom_net_wm_name;
  atoms[1] = screen->display->atom_net_close_window;
  atoms[2] = screen->display->atom_net_wm_state;
  atoms[3] = screen->display->atom_net_wm_state_shaded;
  atoms[4] = screen->display->atom_net_wm_state_maximized_vert;
  atoms[5] = screen->display->atom_net_wm_state_maximized_horz;
  atoms[6] = screen->display->atom_net_wm_desktop;
  atoms[7] = screen->display->atom_net_number_of_desktops;
  atoms[8] = screen->display->atom_net_current_desktop;
  atoms[9] = screen->display->atom_net_wm_window_type;
  atoms[10] = screen->display->atom_net_wm_window_type_desktop;
  atoms[11] = screen->display->atom_net_wm_window_type_dock;
  atoms[12] = screen->display->atom_net_wm_window_type_toolbar;
  atoms[13] = screen->display->atom_net_wm_window_type_menu;
  atoms[14] = screen->display->atom_net_wm_window_type_dialog;
  atoms[15] = screen->display->atom_net_wm_window_type_normal;
  atoms[16] = screen->display->atom_net_wm_state_modal;
rhp's avatar
...  
rhp committed
112 113
  atoms[17] = screen->display->atom_net_client_list;
  atoms[18] = screen->display->atom_net_client_list_stacking;
rhp's avatar
...  
rhp committed
114 115
  atoms[19] = screen->display->atom_net_wm_state_skip_taskbar;
  atoms[20] = screen->display->atom_net_wm_state_skip_pager;
116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142
  atoms[21] = screen->display->atom_net_wm_icon_name;
  atoms[22] = screen->display->atom_net_wm_icon;
  atoms[23] = screen->display->atom_net_wm_icon_geometry;
  atoms[24] = screen->display->atom_net_wm_moveresize;
  atoms[25] = screen->display->atom_net_active_window;
  atoms[26] = screen->display->atom_net_wm_strut;
  atoms[27] = screen->display->atom_net_wm_state_hidden;
  atoms[28] = screen->display->atom_net_wm_window_type_utility;
  atoms[29] = screen->display->atom_net_wm_window_type_splash;
  atoms[30] = screen->display->atom_net_wm_state_fullscreen;
  atoms[31] = screen->display->atom_net_wm_ping;
  atoms[32] = screen->display->atom_net_wm_pid;
  atoms[33] = screen->display->atom_net_workarea;
  atoms[34] = screen->display->atom_net_showing_desktop;
  atoms[35] = screen->display->atom_net_desktop_layout;
  atoms[36] = screen->display->atom_net_desktop_names;
  atoms[37] = screen->display->atom_net_wm_allowed_actions;
  atoms[38] = screen->display->atom_net_wm_action_move;
  atoms[39] = screen->display->atom_net_wm_action_resize;
  atoms[40] = screen->display->atom_net_wm_action_shade;
  atoms[41] = screen->display->atom_net_wm_action_stick;
  atoms[42] = screen->display->atom_net_wm_action_maximize_horz;
  atoms[43] = screen->display->atom_net_wm_action_maximize_vert;
  atoms[44] = screen->display->atom_net_wm_action_change_desktop;
  atoms[45] = screen->display->atom_net_wm_action_close;
  atoms[46] = screen->display->atom_net_wm_state_above;
  atoms[47] = screen->display->atom_net_wm_state_below;
Elijah Newren's avatar
Elijah Newren committed
143 144 145 146 147 148
  atoms[48] = screen->display->atom_net_startup_id;
  atoms[49] = screen->display->atom_net_wm_strut_partial;
  atoms[50] = screen->display->atom_net_wm_action_fullscreen;
  atoms[51] = screen->display->atom_net_wm_action_minimize;
  atoms[52] = screen->display->atom_net_frame_extents;
  atoms[53] = screen->display->atom_net_request_frame_extents;
149 150 151 152 153 154
  atoms[54] = screen->display->atom_net_wm_user_time;
  atoms[55] = screen->display->atom_net_wm_state_demands_attention;
  atoms[56] = screen->display->atom_net_desktop_geometry;
  atoms[57] = screen->display->atom_net_desktop_viewport;
  //atoms[58] = screen->display->atom_net_restack_window;
  //atoms[59] = screen->display->atom_net_moveresize_window;
rhp's avatar
...  
rhp committed
155 156
  
  XChangeProperty (screen->display->xdisplay, screen->xroot,
157
                   screen->display->atom_net_supported,
rhp's avatar
...  
rhp committed
158 159
                   XA_ATOM,
                   32, PropModeReplace, (guchar*) atoms, N_SUPPORTED);
rhp's avatar
...  
rhp committed
160
  
rhp's avatar
...  
rhp committed
161 162 163 164
  return Success;
#undef N_SUPPORTED
}

Havoc Pennington's avatar
Havoc Pennington committed
165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187
static int
set_wm_icon_size_hint (MetaScreen *screen)
{
#define N_VALS 6
  gulong vals[N_VALS];

  /* min width, min height, max w, max h, width inc, height inc */
  vals[0] = META_ICON_WIDTH;
  vals[1] = META_ICON_HEIGHT;
  vals[2] = META_ICON_WIDTH;
  vals[3] = META_ICON_HEIGHT;
  vals[4] = 0;
  vals[5] = 0;
  
  XChangeProperty (screen->display->xdisplay, screen->xroot,
                   screen->display->atom_wm_icon_size,
                   XA_CARDINAL,
                   32, PropModeReplace, (guchar*) vals, N_VALS);
  
  return Success;
#undef N_VALS
}

188 189 190 191 192
static void
reload_xinerama_infos (MetaScreen *screen)
{
  MetaDisplay *display;

193 194 195 196 197 198 199 200 201 202 203 204 205 206
  {
    GList *tmp;

    tmp = screen->workspaces;
    while (tmp != NULL)
      {
        MetaWorkspace *space = tmp->data;

        meta_workspace_invalidate_work_area (space);
        
        tmp = tmp->next;
      }
  }

207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240
  display = screen->display;
  
  if (screen->xinerama_infos)
    g_free (screen->xinerama_infos);
  
  screen->xinerama_infos = NULL;
  screen->n_xinerama_infos = 0;
  screen->last_xinerama_index = 0;

  screen->display->xinerama_cache_invalidated = TRUE;
  
#ifdef HAVE_XFREE_XINERAMA
  if (XineramaIsActive (display->xdisplay))
    {
      XineramaScreenInfo *infos;
      int n_infos;
      int i;
      
      n_infos = 0;
      infos = XineramaQueryScreens (display->xdisplay, &n_infos);

      meta_topic (META_DEBUG_XINERAMA,
                  "Found %d Xinerama screens on display %s\n",
                  n_infos, display->name);

      if (n_infos > 0)
        {
          screen->xinerama_infos = g_new (MetaXineramaScreenInfo, n_infos);
          screen->n_xinerama_infos = n_infos;
          
          i = 0;
          while (i < n_infos)
            {
              screen->xinerama_infos[i].number = infos[i].screen_number;
241 242 243 244
              screen->xinerama_infos[i].rect.x = infos[i].x_org;
              screen->xinerama_infos[i].rect.y = infos[i].y_org;
              screen->xinerama_infos[i].rect.width = infos[i].width;
              screen->xinerama_infos[i].rect.height = infos[i].height;
245 246 247 248

              meta_topic (META_DEBUG_XINERAMA,
                          "Xinerama %d is %d,%d %d x %d\n",
                          screen->xinerama_infos[i].number,
249 250 251 252
                          screen->xinerama_infos[i].rect.x,
                          screen->xinerama_infos[i].rect.y,
                          screen->xinerama_infos[i].rect.width,
                          screen->xinerama_infos[i].rect.height);
253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283
              
              ++i;
            }
        }
      
      meta_XFree (infos);
    }
  else
    {
      meta_topic (META_DEBUG_XINERAMA,
                  "No XFree86 Xinerama extension or XFree86 Xinerama inactive on display %s\n",
                  display->name);
    }
#else
  meta_topic (META_DEBUG_XINERAMA,
              "Metacity compiled without XFree86 Xinerama support\n");
#endif /* HAVE_XFREE_XINERAMA */

#ifdef HAVE_SOLARIS_XINERAMA
  /* This code from GDK, Copyright (C) 2002 Sun Microsystems */
  if (screen->n_xinerama_infos == 0 &&
      XineramaGetState (screen->display->xdisplay,
                        screen->number))
    {
      XRectangle monitors[MAXFRAMEBUFFERS];
      unsigned char hints[16];
      int result;
      int n_monitors;
      int i;

      n_monitors = 0;
284
      result = XineramaGetInfo (screen->display->xdisplay,
285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301
                                screen->number,
				monitors, hints,
                                &n_monitors);
      /* Yes I know it should be Success but the current implementation 
       * returns the num of monitor
       */
      if (result > 0)
	{
          g_assert (n_monitors > 0);
          
          screen->xinerama_infos = g_new (MetaXineramaScreenInfo, n_monitors);
          screen->n_xinerama_infos = n_monitors;
          
          i = 0;
          while (i < n_monitors)
            {
              screen->xinerama_infos[i].number = i;
302 303 304 305
              screen->xinerama_infos[i].rect.x = monitors[i].x;
              screen->xinerama_infos[i].rect.y = monitors[i].y;
              screen->xinerama_infos[i].rect.width = monitors[i].width;
              screen->xinerama_infos[i].rect.height = monitors[i].height;
306 307 308 309

              meta_topic (META_DEBUG_XINERAMA,
                          "Xinerama %d is %d,%d %d x %d\n",
                          screen->xinerama_infos[i].number,
310 311 312 313
                          screen->xinerama_infos[i].rect.x,
                          screen->xinerama_infos[i].rect.y,
                          screen->xinerama_infos[i].rect.width,
                          screen->xinerama_infos[i].rect.height);              
314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344
              
              ++i;
            }
	}
    }
  else if (screen->n_xinerama_infos == 0)
    {
      meta_topic (META_DEBUG_XINERAMA,
                  "No Solaris Xinerama extension or Solaris Xinerama inactive on display %s\n",
                  display->name);
    }
#else
  meta_topic (META_DEBUG_XINERAMA,
              "Metacity compiled without Solaris Xinerama support\n");
#endif /* HAVE_SOLARIS_XINERAMA */

  
  /* If no Xinerama, fill in the single screen info so
   * we can use the field unconditionally
   */
  if (screen->n_xinerama_infos == 0)
    {
      if (g_getenv ("METACITY_DEBUG_XINERAMA"))
        {
          meta_topic (META_DEBUG_XINERAMA,
                      "Pretending a single monitor has two Xinerama screens\n");
          
          screen->xinerama_infos = g_new (MetaXineramaScreenInfo, 2);
          screen->n_xinerama_infos = 2;
          
          screen->xinerama_infos[0].number = 0;
345 346
          screen->xinerama_infos[0].rect = screen->rect;
          screen->xinerama_infos[0].rect.width = screen->rect.width / 2;
347 348

          screen->xinerama_infos[1].number = 1;
349 350 351
          screen->xinerama_infos[1].rect = screen->rect;
          screen->xinerama_infos[1].rect.x = screen->rect.width / 2;
          screen->xinerama_infos[1].rect.width = screen->rect.width / 2;
352 353 354 355 356 357 358 359 360 361
        }
      else
        {
          meta_topic (META_DEBUG_XINERAMA,
                      "No Xinerama screens, using default screen info\n");
          
          screen->xinerama_infos = g_new (MetaXineramaScreenInfo, 1);
          screen->n_xinerama_infos = 1;
          
          screen->xinerama_infos[0].number = 0;
362
          screen->xinerama_infos[0].rect = screen->rect;
363 364 365 366 367 368 369
        }
    }

  g_assert (screen->n_xinerama_infos > 0);
  g_assert (screen->xinerama_infos != NULL);
}

rhp's avatar
...  
rhp committed
370 371
MetaScreen*
meta_screen_new (MetaDisplay *display,
372
                 int          number,
373
                 guint32      timestamp)
rhp's avatar
...  
rhp committed
374 375
{
  MetaScreen *screen;
rhp's avatar
...  
rhp committed
376 377
  Window xroot;
  Display *xdisplay;
378
  XWindowAttributes attr;
Havoc Pennington's avatar
Havoc Pennington committed
379 380 381 382 383
  Window new_wm_sn_owner;
  Window current_wm_sn_owner;
  gboolean replace_current_wm;
  Atom wm_sn_atom;
  char buf[128];
384
  guint32 manager_timestamp;
Havoc Pennington's avatar
Havoc Pennington committed
385
  gulong current_workspace;
Havoc Pennington's avatar
Havoc Pennington committed
386 387
  
  replace_current_wm = meta_get_replace_current_wm ();
rhp's avatar
...  
rhp committed
388
  
rhp's avatar
...  
rhp committed
389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410
  /* Only display->name, display->xdisplay, and display->error_traps
   * can really be used in this function, since normally screens are
   * created from the MetaDisplay constructor
   */
  
  xdisplay = display->xdisplay;
  
  meta_verbose ("Trying screen %d on display '%s'\n",
                number, display->name);

  xroot = RootWindow (xdisplay, number);

  /* FVWM checks for None here, I don't know if this
   * ever actually happens
   */
  if (xroot == None)
    {
      meta_warning (_("Screen %d on display '%s' is invalid\n"),
                    number, display->name);
      return NULL;
    }

Havoc Pennington's avatar
Havoc Pennington committed
411 412 413 414 415 416 417 418 419 420 421
  sprintf (buf, "WM_S%d", number);
  wm_sn_atom = XInternAtom (xdisplay, buf, False);  
  
  current_wm_sn_owner = XGetSelectionOwner (xdisplay, wm_sn_atom);

  if (current_wm_sn_owner != None)
    {
      XSetWindowAttributes attrs;
      
      if (!replace_current_wm)
        {
422
          meta_warning (_("Screen %d on display \"%s\" already has a window manager; try using the --replace option to replace the current window manager.\n"),
Havoc Pennington's avatar
Havoc Pennington committed
423 424 425 426 427 428
                        number, display->name);

          return NULL;
        }

      /* We want to find out when the current selection owner dies */
429
      meta_error_trap_push_with_return (display);
Havoc Pennington's avatar
Havoc Pennington committed
430 431 432
      attrs.event_mask = StructureNotifyMask;
      XChangeWindowAttributes (xdisplay,
                               current_wm_sn_owner, CWEventMask, &attrs);
433
      if (meta_error_trap_pop_with_return (display, FALSE) != Success)
Havoc Pennington's avatar
Havoc Pennington committed
434 435 436
        current_wm_sn_owner = None; /* don't wait for it to die later on */
    }

437
  new_wm_sn_owner = meta_create_offscreen_window (xdisplay, xroot);
Havoc Pennington's avatar
Havoc Pennington committed
438

439
  manager_timestamp = timestamp;
Havoc Pennington's avatar
Havoc Pennington committed
440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484
  
  XSetSelectionOwner (xdisplay, wm_sn_atom, new_wm_sn_owner,
                      manager_timestamp);

  if (XGetSelectionOwner (xdisplay, wm_sn_atom) != new_wm_sn_owner)
    {
      meta_warning (_("Could not acquire window manager selection on screen %d display \"%s\"\n"),
                    number, display->name);

      XDestroyWindow (xdisplay, new_wm_sn_owner);
      
      return NULL;
    }
  
  {
    /* Send client message indicating that we are now the WM */
    XClientMessageEvent ev;
    
    ev.type = ClientMessage;
    ev.window = xroot;
    ev.message_type = display->atom_manager;
    ev.format = 32;
    ev.data.l[0] = manager_timestamp;
    ev.data.l[1] = wm_sn_atom;

    XSendEvent (xdisplay, xroot, False, StructureNotifyMask, (XEvent*)&ev);
  }

  /* Wait for old window manager to go away */
  if (current_wm_sn_owner != None)
    {
      XEvent event;

      /* We sort of block infinitely here which is probably lame. */
      
      meta_verbose ("Waiting for old window manager to exit\n");
      do
        {
          XWindowEvent (xdisplay, current_wm_sn_owner,
                        StructureNotifyMask, &event);
        }
      while (event.type != DestroyNotify);
    }
  
  /* select our root window events */
485
  meta_error_trap_push_with_return (display);
486 487 488 489 490

  /* We need to or with the existing event mask since
   * gtk+ may be interested in other events.
   */
  XGetWindowAttributes (xdisplay, xroot, &attr);
rhp's avatar
...  
rhp committed
491 492 493 494 495
  XSelectInput (xdisplay,
                xroot,
                SubstructureRedirectMask | SubstructureNotifyMask |
                ColormapChangeMask | PropertyChangeMask |
                LeaveWindowMask | EnterWindowMask |
496
                KeyPressMask | KeyReleaseMask |
497
                FocusChangeMask | StructureNotifyMask |
498 499 500
#ifdef HAVE_COMPOSITE_EXTENSIONS
                ExposureMask |
#endif
501
		attr.your_event_mask);
502
  if (meta_error_trap_pop_with_return (display, FALSE) != Success)
rhp's avatar
...  
rhp committed
503
    {
Havoc Pennington's avatar
Havoc Pennington committed
504
      meta_warning (_("Screen %d on display \"%s\" already has a window manager\n"),
rhp's avatar
...  
rhp committed
505
                    number, display->name);
Havoc Pennington's avatar
Havoc Pennington committed
506 507 508

      XDestroyWindow (xdisplay, new_wm_sn_owner);
      
rhp's avatar
...  
rhp committed
509 510
      return NULL;
    }
rhp's avatar
...  
rhp committed
511 512
  
  screen = g_new (MetaScreen, 1);
513
  screen->closing = 0;
Havoc Pennington's avatar
Havoc Pennington committed
514
  
rhp's avatar
...  
rhp committed
515
  screen->display = display;
rhp's avatar
...  
rhp committed
516
  screen->number = number;
rhp's avatar
...  
rhp committed
517
  screen->screen_name = get_screen_name (display, number);
rhp's avatar
...  
rhp committed
518
  screen->xscreen = ScreenOfDisplay (xdisplay, number);
rhp's avatar
...  
rhp committed
519
  screen->xroot = xroot;
520 521 522
  screen->rect.x = screen->rect.y = 0;
  screen->rect.width = WidthOfScreen (screen->xscreen);
  screen->rect.height = HeightOfScreen (screen->xscreen);
rhp's avatar
...  
rhp committed
523
  screen->current_cursor = -1; /* invalid/unset */
Havoc Pennington's avatar
Havoc Pennington committed
524 525
  screen->default_xvisual = DefaultVisualOfScreen (screen->xscreen);
  screen->default_depth = DefaultDepthOfScreen (screen->xscreen);
526
  screen->flash_window = None;
527

Havoc Pennington's avatar
Havoc Pennington committed
528 529 530 531
  screen->wm_sn_selection_window = new_wm_sn_owner;
  screen->wm_sn_atom = wm_sn_atom;
  screen->wm_sn_timestamp = manager_timestamp;
  
532
  screen->work_area_idle = 0;
533

534
  screen->active_workspace = NULL;
535
  screen->workspaces = NULL;
536 537 538
  screen->rows_of_workspaces = 1;
  screen->columns_of_workspaces = -1;
  screen->vertical_workspaces = FALSE;
539
  screen->starting_corner = META_SCREEN_TOPLEFT;
540
  screen->compositor_data = NULL;
541

542
  {
Ray Strode's avatar
Ray Strode committed
543
    XFontStruct *font_info;
544
    XGCValues gc_values;
Ray Strode's avatar
Ray Strode committed
545
    gulong value_mask = 0;
546 547
    
    gc_values.subwindow_mode = IncludeInferiors;
Ray Strode's avatar
Ray Strode committed
548
    value_mask |= GCSubwindowMode;
549
    gc_values.function = GXinvert;
Ray Strode's avatar
Ray Strode committed
550
    value_mask |= GCFunction;
551
    gc_values.line_width = META_WIREFRAME_XOR_LINE_WIDTH;
Ray Strode's avatar
Ray Strode committed
552 553 554 555 556 557 558 559
    value_mask |= GCLineWidth;

    font_info = XLoadQueryFont (screen->display->xdisplay, "fixed");

    if (font_info != NULL)
      {
        gc_values.font = font_info->fid;
        value_mask |= GCFont;
560
        XFreeFontInfo (NULL, font_info, 1);
Ray Strode's avatar
Ray Strode committed
561 562 563 564
      }
    else
      meta_warning ("xserver doesn't have 'fixed' font.\n");

565 566
    screen->root_xor_gc = XCreateGC (screen->display->xdisplay,
                                     screen->xroot,
Ray Strode's avatar
Ray Strode committed
567
                                     value_mask,
568 569
                                     &gc_values);
  }
570
  
571 572
  screen->xinerama_infos = NULL;
  screen->n_xinerama_infos = 0;
573
  screen->last_xinerama_index = 0;  
574
  
575
  reload_xinerama_infos (screen);
rhp's avatar
...  
rhp committed
576 577
  
  meta_screen_set_cursor (screen, META_CURSOR_DEFAULT);
578

579 580 581 582 583 584 585
  /* Handle creating a no_focus_window for this screen */  
  screen->no_focus_window = meta_create_offscreen_window (display->xdisplay,
                                                          screen->xroot);
  XSelectInput (display->xdisplay, screen->no_focus_window,
                FocusChangeMask | KeyPressMask | KeyReleaseMask);
  XMapWindow (display->xdisplay, screen->no_focus_window);
  /* Done with no_focus_window stuff */
586
  
Havoc Pennington's avatar
Havoc Pennington committed
587
  set_wm_icon_size_hint (screen);
rhp's avatar
...  
rhp committed
588
  
rhp's avatar
...  
rhp committed
589 590 591
  set_supported_hint (screen);
  
  set_wm_check_hint (screen);
592

593 594 595 596
  set_desktop_viewport_hint (screen);

  set_desktop_geometry_hint (screen);

597
  meta_screen_update_workspace_layout (screen);
Havoc Pennington's avatar
Havoc Pennington committed
598 599 600 601 602 603 604 605 606 607 608

  /* Get current workspace */
  current_workspace = 0;
  if (meta_prop_get_cardinal (screen->display,
                              screen->xroot,
                              screen->display->atom_net_current_desktop,
                              &current_workspace))
    meta_verbose ("Read existing _NET_CURRENT_DESKTOP = %d\n",
                  (int) current_workspace);
  else
    meta_verbose ("No _NET_CURRENT_DESKTOP present\n");
rhp's avatar
...  
rhp committed
609
  
rhp's avatar
...  
rhp committed
610 611 612
  /* Screens must have at least one workspace at all times,
   * so create that required workspace.
   */
613
  meta_workspace_activate (meta_workspace_new (screen), timestamp);
614
  update_num_workspaces (screen, timestamp);
Havoc Pennington's avatar
Havoc Pennington committed
615
  
616 617
  set_workspace_names (screen);

618
  screen->all_keys_grabbed = FALSE;
619
  screen->keys_grabbed = FALSE;
rhp's avatar
...  
rhp committed
620
  meta_screen_grab_keys (screen);
rhp's avatar
...  
rhp committed
621

rhp's avatar
...  
rhp committed
622
  screen->ui = meta_ui_new (screen->display->xdisplay,
rhp's avatar
...  
rhp committed
623
                            screen->xscreen);
rhp's avatar
...  
rhp committed
624

625 626
  screen->tab_popup = NULL;
  
rhp's avatar
...  
rhp committed
627
  screen->stack = meta_stack_new (screen);
628 629

  meta_prefs_add_listener (prefs_changed_callback, screen);
630 631 632 633 634 635 636 637 638 639 640

#ifdef HAVE_STARTUP_NOTIFICATION
  screen->sn_context =
    sn_monitor_context_new (screen->display->sn_display,
                            screen->number,
                            meta_screen_sn_event,
                            screen,
                            NULL);
  screen->startup_sequences = NULL;
  screen->startup_sequence_timeout = 0;
#endif
Havoc Pennington's avatar
Havoc Pennington committed
641 642 643 644 645 646 647 648 649

  /* Switch to the _NET_CURRENT_DESKTOP workspace */
  {
    MetaWorkspace *space;
    
    space = meta_screen_get_workspace_by_index (screen,
                                                current_workspace);
    
    if (space != NULL)
650
      meta_workspace_activate (space, timestamp);
Havoc Pennington's avatar
Havoc Pennington committed
651
  }
Havoc Pennington's avatar
Havoc Pennington committed
652

rhp's avatar
...  
rhp committed
653
  meta_verbose ("Added screen %d ('%s') root 0x%lx\n",
Havoc Pennington's avatar
Havoc Pennington committed
654
                screen->number, screen->screen_name, screen->xroot);
rhp's avatar
...  
rhp committed
655 656 657 658 659
  
  return screen;
}

void
660 661
meta_screen_free (MetaScreen *screen,
                  guint32     timestamp)
Havoc Pennington's avatar
Havoc Pennington committed
662 663
{
  MetaDisplay *display;
664
  XGCValues gc_values = { 0 };
Havoc Pennington's avatar
Havoc Pennington committed
665 666

  display = screen->display;
667 668

  screen->closing += 1;
Havoc Pennington's avatar
Havoc Pennington committed
669 670 671
  
  meta_display_grab (display);

672 673 674 675 676
  if (screen->display->compositor)
    {
      meta_compositor_unmanage_screen (screen->display->compositor,
				       screen);
    }
Havoc Pennington's avatar
Havoc Pennington committed
677
  
678
  meta_display_unmanage_windows_for_screen (display, screen, timestamp);
Havoc Pennington's avatar
Havoc Pennington committed
679
  
680 681
  meta_prefs_remove_listener (prefs_changed_callback, screen);
  
rhp's avatar
...  
rhp committed
682
  meta_screen_ungrab_keys (screen);
683

684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701
#ifdef HAVE_STARTUP_NOTIFICATION
  g_slist_foreach (screen->startup_sequences,
                   (GFunc) sn_startup_sequence_unref, NULL);
  g_slist_free (screen->startup_sequences);
  screen->startup_sequences = NULL;

  if (screen->startup_sequence_timeout != 0)
    {
      g_source_remove (screen->startup_sequence_timeout);
      screen->startup_sequence_timeout = 0;
    }
  if (screen->sn_context)
    {
      sn_monitor_context_unref (screen->sn_context);
      screen->sn_context = NULL;
    }
#endif
  
rhp's avatar
...  
rhp committed
702
  meta_ui_free (screen->ui);
rhp's avatar
...  
rhp committed
703

rhp's avatar
...  
rhp committed
704
  meta_stack_free (screen->stack);
705

706
  meta_error_trap_push_with_return (screen->display);
707
  XSelectInput (screen->display->xdisplay, screen->xroot, 0);
708
  if (meta_error_trap_pop_with_return (screen->display, FALSE) != Success)
Havoc Pennington's avatar
Havoc Pennington committed
709
    meta_warning (_("Could not release screen %d on display \"%s\"\n"),
710
                  screen->number, screen->display->name);
711

Havoc Pennington's avatar
Havoc Pennington committed
712 713 714
  XDestroyWindow (screen->display->xdisplay,
                  screen->wm_sn_selection_window);
  
715 716
  if (screen->work_area_idle != 0)
    g_source_remove (screen->work_area_idle);
717

718 719 720 721 722 723 724 725 726 727

  if (XGetGCValues (screen->display->xdisplay,
                    screen->root_xor_gc,
                    GCFont,
                    &gc_values))
    {
      XUnloadFont (screen->display->xdisplay,
                   gc_values.font);
    }

728 729
  XFreeGC (screen->display->xdisplay,
           screen->root_xor_gc);
rhp's avatar
...  
rhp committed
730
  
731 732 733
  if (screen->xinerama_infos)
    g_free (screen->xinerama_infos);
  
rhp's avatar
...  
rhp committed
734
  g_free (screen->screen_name);
rhp's avatar
...  
rhp committed
735
  g_free (screen);
Havoc Pennington's avatar
Havoc Pennington committed
736

737
  XFlush (display->xdisplay);
Havoc Pennington's avatar
Havoc Pennington committed
738
  meta_display_ungrab (display);
rhp's avatar
...  
rhp committed
739 740
}

Søren Sandmann's avatar
Søren Sandmann committed
741 742 743 744 745 746 747 748
typedef struct
{
  Window		xwindow;
  XWindowAttributes	attrs;
} WindowInfo;

static GList *
list_windows (MetaScreen *screen)
rhp's avatar
...  
rhp committed
749 750 751
{
  Window ignored1, ignored2;
  Window *children;
Søren Sandmann's avatar
Søren Sandmann committed
752 753
  guint n_children, i;
  GList *result;
rhp's avatar
...  
rhp committed
754 755 756 757

  XQueryTree (screen->display->xdisplay,
              screen->xroot,
              &ignored1, &ignored2, &children, &n_children);
rhp's avatar
...  
rhp committed
758

Søren Sandmann's avatar
Søren Sandmann committed
759 760
  result = NULL;
  for (i = 0; i < n_children; ++i)
rhp's avatar
...  
rhp committed
761
    {
Søren Sandmann's avatar
Søren Sandmann committed
762
      WindowInfo *info = g_new0 (WindowInfo, 1);
rhp's avatar
...  
rhp committed
763

Havoc Pennington's avatar
Havoc Pennington committed
764 765 766
      meta_error_trap_push_with_return (screen->display);
      
      XGetWindowAttributes (screen->display->xdisplay,
Søren Sandmann's avatar
Søren Sandmann committed
767 768 769 770
                            children[i], &info->attrs);

      if (meta_error_trap_pop_with_return (screen->display, TRUE))
	{
Havoc Pennington's avatar
Havoc Pennington committed
771 772
          meta_verbose ("Failed to get attributes for window 0x%lx\n",
                        children[i]);
Søren Sandmann's avatar
Søren Sandmann committed
773
	  g_free (info);
Havoc Pennington's avatar
Havoc Pennington committed
774 775 776
        }
      else
        {
Søren Sandmann's avatar
Søren Sandmann committed
777 778
	  info->xwindow = children[i];
	}
779

Søren Sandmann's avatar
Søren Sandmann committed
780 781
      result = g_list_prepend (result, info);
    }
rhp's avatar
...  
rhp committed
782

Søren Sandmann's avatar
Søren Sandmann committed
783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805
  if (children)
    XFree (children);

  return g_list_reverse (result);
}

void
meta_screen_manage_all_windows (MetaScreen *screen)
{
  GList *windows;
  GList *list;

  meta_display_grab (screen->display);
  
  windows = list_windows (screen);

  meta_stack_freeze (screen->stack);
  for (list = windows; list != NULL; list = list->next)
    {
      WindowInfo *info = list->data;

      meta_window_new_with_attrs (screen->display, info->xwindow, TRUE,
				  &info->attrs);
rhp's avatar
...  
rhp committed
806
    }
rhp's avatar
...  
rhp committed
807
  meta_stack_thaw (screen->stack);
rhp's avatar
...  
rhp committed
808

Søren Sandmann's avatar
Søren Sandmann committed
809 810 811
  g_list_foreach (windows, (GFunc)g_free, NULL);
  g_list_free (windows);

rhp's avatar
...  
rhp committed
812
  meta_display_ungrab (screen->display);
Søren Sandmann's avatar
Søren Sandmann committed
813 814 815 816 817 818 819 820 821
}

void
meta_screen_composite_all_windows (MetaScreen *screen)
{
  GList *windows, *list;

  if (!screen->display->compositor)
    return;
822

Søren Sandmann's avatar
Søren Sandmann committed
823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838
  windows = list_windows (screen);

  meta_stack_freeze (screen->stack);

  for (list = windows; list != NULL; list = list->next)
    {
      WindowInfo *info = list->data;

      meta_compositor_add_window (screen->display->compositor,
				  info->xwindow, &info->attrs);
    }

  meta_stack_thaw (screen->stack);

  g_list_foreach (windows, (GFunc)g_free, NULL);
  g_list_free (windows);
rhp's avatar
...  
rhp committed
839
}
rhp's avatar
...  
rhp committed
840 841 842 843 844 845 846 847 848 849 850 851 852

MetaScreen*
meta_screen_for_x_screen (Screen *xscreen)
{
  MetaDisplay *display;
  
  display = meta_display_for_x_display (DisplayOfScreen (xscreen));

  if (display == NULL)
    return NULL;
  
  return meta_display_screen_for_x_screen (display, xscreen);
}
rhp's avatar
...  
rhp committed
853

854 855 856 857 858 859 860 861
static void
prefs_changed_callback (MetaPreference pref,
                        gpointer       data)
{
  MetaScreen *screen = data;
  
  if (pref == META_PREF_NUM_WORKSPACES)
    {
862 863 864 865 866 867
      /* GConf doesn't provide timestamps, but luckily update_num_workspaces
       * often doesn't need it...
       */
      guint32 timestamp = 
        meta_display_get_current_time_roundtrip (screen->display);
      update_num_workspaces (screen, timestamp);
868
    }
869 870 871 872
  else if (pref == META_PREF_FOCUS_MODE)
    {
      update_focus_mode (screen);
    }
873 874
  else if (pref == META_PREF_WORKSPACE_NAMES)
    {
875
      set_workspace_names (screen);
876
    }
877 878 879
}


rhp's avatar
...  
rhp committed
880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908
static char*
get_screen_name (MetaDisplay *display,
                 int          number)
{
  char *p;
  char *dname;
  char *scr;
  
  /* DisplayString gives us a sort of canonical display,
   * vs. the user-entered name from XDisplayName()
   */
  dname = g_strdup (DisplayString (display->xdisplay));

  /* Change display name to specify this screen.
   */
  p = strrchr (dname, ':');
  if (p)
    {
      p = strchr (p, '.');
      if (p)
        *p = '\0';
    }
  
  scr = g_strdup_printf ("%s.%d", dname, number);

  g_free (dname);

  return scr;
}
rhp's avatar
...  
rhp committed
909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964

static gint
ptrcmp (gconstpointer a, gconstpointer b)
{
  if (a < b)
    return -1;
  else if (a > b)
    return 1;
  else
    return 0;
}

static void
listify_func (gpointer key, gpointer value, gpointer data)
{
  GSList **listp;
  
  listp = data;

  *listp = g_slist_prepend (*listp, value);
}

void
meta_screen_foreach_window (MetaScreen *screen,
                            MetaScreenWindowFunc func,
                            gpointer data)
{
  GSList *winlist;
  GSList *tmp;

  /* If we end up doing this often, just keeping a list
   * of windows might be sensible.
   */
  
  winlist = NULL;
  g_hash_table_foreach (screen->display->window_ids,
                        listify_func,
                        &winlist);
  
  winlist = g_slist_sort (winlist, ptrcmp);
  
  tmp = winlist;
  while (tmp != NULL)
    {
      /* If the next node doesn't contain this window
       * a second time, delete the window.
       */
      if (tmp->next == NULL ||
          (tmp->next && tmp->next->data != tmp->data))
        {
          MetaWindow *window = tmp->data;

          if (window->screen == screen)
            (* func) (screen, window, data);
        }
      
965
      tmp = tmp->next;
rhp's avatar
...  
rhp committed
966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981
    }
  g_slist_free (winlist);
}

static void
queue_draw (MetaScreen *screen, MetaWindow *window, gpointer data)
{
  if (window->frame)
    meta_frame_queue_draw (window->frame);
}

void
meta_screen_queue_frame_redraws (MetaScreen *screen)
{
  meta_screen_foreach_window (screen, queue_draw, NULL);
}
rhp's avatar
...  
rhp committed
982

rhp's avatar
...  
rhp committed
983 984 985 986 987 988 989 990 991 992 993
static void
queue_resize (MetaScreen *screen, MetaWindow *window, gpointer data)
{
  meta_window_queue_move_resize (window);
}

void
meta_screen_queue_window_resizes (MetaScreen *screen)
{
  meta_screen_foreach_window (screen, queue_resize, NULL);
}
rhp's avatar
...  
rhp committed
994

rhp's avatar
rhp committed
995 996
int
meta_screen_get_n_workspaces (MetaScreen *screen)
997 998 999 1000 1001 1002 1003
{
  return g_list_length (screen->workspaces);
}

MetaWorkspace*
meta_screen_get_workspace_by_index (MetaScreen  *screen,
                                    int          idx)
rhp's avatar
rhp committed
1004 1005 1006 1007
{
  GList *tmp;
  int i;

1008 1009 1010 1011
  /* should be robust, idx is maybe from an app */
  if (idx < 0)
    return NULL;
  
rhp's avatar
rhp committed
1012
  i = 0;
1013
  tmp = screen->workspaces;
rhp's avatar
rhp committed
1014 1015 1016 1017
  while (tmp != NULL)
    {
      MetaWorkspace *w = tmp->data;

1018 1019 1020 1021
      if (i == idx)
        return w;

      ++i;
rhp's avatar
rhp committed
1022 1023 1024
      tmp = tmp->next;
    }

1025
  return NULL;
1026
}
rhp's avatar
rhp committed
1027

1028
static void
1029 1030 1031 1032 1033 1034
set_number_of_spaces_hint (MetaScreen *screen,
			   int         n_spaces)
{
  unsigned long data[1];

  if (screen->closing > 0)
1035
    return;
1036 1037 1038

  data[0] = n_spaces;

1039
  meta_verbose ("Setting _NET_NUMBER_OF_DESKTOPS to %lu\n", data[0]);
1040 1041 1042 1043 1044 1045

  meta_error_trap_push (screen->display);
  XChangeProperty (screen->display->xdisplay, screen->xroot,
                   screen->display->atom_net_number_of_desktops,
                   XA_CARDINAL,
                   32, PropModeReplace, (guchar*) data, 1);
1046
  meta_error_trap_pop (screen->display, FALSE);
1047 1048
}

1049 1050 1051 1052 1053 1054 1055 1056
static void
set_desktop_geometry_hint (MetaScreen *screen)
{
  unsigned long data[2];

  if (screen->closing > 0)
    return;

1057 1058
  data[0] = screen->rect.width;
  data[1] = screen->rect.height;
1059

1060
  meta_verbose ("Setting _NET_DESKTOP_GEOMETRY to %lu, %lu\n", data[0], data[1]);
1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093

  meta_error_trap_push (screen->display);
  XChangeProperty (screen->display->xdisplay, screen->xroot,
                   screen->display->atom_net_desktop_geometry,
                   XA_CARDINAL,
                   32, PropModeReplace, (guchar*) data, 2);
  meta_error_trap_pop (screen->display, FALSE);
}

static void
set_desktop_viewport_hint (MetaScreen *screen)
{
  unsigned long data[2];

  if (screen->closing > 0)
    return;

  /*
   * Metacity does not implement viewports, so this is a fixed 0,0
   */
  data[0] = 0;
  data[1] = 0;

  meta_verbose ("Setting _NET_DESKTOP_VIEWPORT to 0, 0\n");

  meta_error_trap_push (screen->display);
  XChangeProperty (screen->display->xdisplay, screen->xroot,
                   screen->display->atom_net_desktop_viewport,
                   XA_CARDINAL,
                   32, PropModeReplace, (guchar*) data, 2);
  meta_error_trap_pop (screen->display, FALSE);
}

1094
static void
1095 1096
update_num_workspaces (MetaScreen *screen,
                       guint32     timestamp)
1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111
{
  int new_num;
  GList *tmp;
  int i;
  GList *extras;
  MetaWorkspace *last_remaining;
  gboolean need_change_space;
  
  new_num = meta_prefs_get_num_workspaces ();

  g_assert (new_num > 0);

  last_remaining = NULL;
  extras = NULL;
  i = 0;
1112
  tmp = screen->workspaces;
1113 1114 1115 1116
  while (tmp != NULL)
    {
      MetaWorkspace *w = tmp->data;

1117
      if (i >= new_num)
1118 1119 1120 1121 1122
        extras = g_list_prepend (extras, w);
      else
        last_remaining = w;
          
      ++i;
1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148
      tmp = tmp->next;
    }

  g_assert (last_remaining);
  
  /* Get rid of the extra workspaces by moving all their windows
   * to last_remaining, then activating last_remaining if
   * one of the removed workspaces was active. This will be a bit
   * wacky if the config tool for changing number of workspaces
   * is on a removed workspace ;-)
   */
  need_change_space = FALSE;
  tmp = extras;
  while (tmp != NULL)
    {
      MetaWorkspace *w = tmp->data;

      meta_workspace_relocate_windows (w, last_remaining);      

      if (w == screen->active_workspace)
        need_change_space = TRUE;
      
      tmp = tmp->next;
    }

  if (need_change_space)
1149
    meta_workspace_activate (last_remaining, timestamp);
1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169

  /* Should now be safe to free the workspaces */
  tmp = extras;
  while (tmp != NULL)
    {
      MetaWorkspace *w = tmp->data;

      g_assert (w->windows == NULL);
      meta_workspace_free (w);
      
      tmp = tmp->next;
    }
  
  g_list_free (extras);
  
  while (i < new_num)
    {
      meta_workspace_new (screen);
      ++i;
    }
1170

1171 1172
  set_number_of_spaces_hint (screen, new_num);

1173
  meta_screen_queue_workarea_recalc (screen);
rhp's avatar
rhp committed
1174
}
rhp's avatar
...  
rhp committed
1175

1176 1177 1178
static void
update_focus_mode (MetaScreen *screen)
{
1179
  /* nothing to do anymore */ ;
1180 1181
}

rhp's avatar
...