screen.c 11 KB
Newer Older
rhp's avatar
...  
rhp committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
/* Metacity X screen handler */

/* 
 * Copyright (C) 2001 Havoc Pennington
 * 
 * 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
21

rhp's avatar
...  
rhp committed
22 23
#include "screen.h"
#include "util.h"
rhp's avatar
...  
rhp committed
24
#include "errors.h"
rhp's avatar
...  
rhp committed
25
#include "window.h"
rhp's avatar
...  
rhp committed
26
#include "frame.h"
rhp's avatar
...  
rhp committed
27 28
#include "workspace.h"
#include "keybindings.h"
rhp's avatar
...  
rhp committed
29
#include "stack.h"
rhp's avatar
...  
rhp committed
30

rhp's avatar
...  
rhp committed
31
#include <X11/Xatom.h>
rhp's avatar
...  
rhp committed
32 33
#include <locale.h>
#include <string.h>
rhp's avatar
...  
rhp committed
34

rhp's avatar
...  
rhp committed
35 36 37 38
static char* get_screen_name (MetaDisplay *display,
                              int          number);


rhp's avatar
...  
rhp committed
39 40 41 42 43
static int
set_wm_check_hint (MetaScreen *screen)
{
  unsigned long data[1];

rhp's avatar
...  
rhp committed
44 45
  g_return_val_if_fail (screen->display->leader_window != None, 0);
  
rhp's avatar
...  
rhp committed
46 47 48 49 50 51
  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
52

53 54 55 56
  /* Legacy GNOME hint (uses cardinal, dunno why) */

  /* legacy hint window should have property containing self */
  XChangeProperty (screen->display->xdisplay, screen->display->leader_window,
rhp's avatar
...  
rhp committed
57
                   screen->display->atom_win_supporting_wm_check,
rhp's avatar
...  
rhp committed
58
                   XA_CARDINAL,
rhp's avatar
...  
rhp committed
59 60
                   32, PropModeReplace, (guchar*) data, 1);

61 62 63 64 65 66 67 68
  /* do this after setting up window fully, to avoid races
   * with clients listening to property notify on root.
   */
  XChangeProperty (screen->display->xdisplay, screen->xroot,
                   screen->display->atom_win_supporting_wm_check,
                   XA_CARDINAL,
                   32, PropModeReplace, (guchar*) data, 1);
  
rhp's avatar
...  
rhp committed
69 70 71 72 73 74
  return Success;
}

static int
set_supported_hint (MetaScreen *screen)
{
rhp's avatar
...  
rhp committed
75
#define N_SUPPORTED 21
rhp's avatar
...  
rhp committed
76
#define N_WIN_SUPPORTED 1
rhp's avatar
...  
rhp committed
77
  Atom atoms[N_SUPPORTED];
rhp's avatar
...  
rhp committed
78
  
rhp's avatar
...  
rhp committed
79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
  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
96 97
  atoms[17] = screen->display->atom_net_client_list;
  atoms[18] = screen->display->atom_net_client_list_stacking;
rhp's avatar
...  
rhp committed
98 99
  atoms[19] = screen->display->atom_net_wm_state_skip_taskbar;
  atoms[20] = screen->display->atom_net_wm_state_skip_pager;
rhp's avatar
...  
rhp committed
100 101 102 103 104 105
  
  XChangeProperty (screen->display->xdisplay, screen->xroot,
                   screen->display->atom_net_wm_supported,
                   XA_ATOM,
                   32, PropModeReplace, (guchar*) atoms, N_SUPPORTED);

rhp's avatar
...  
rhp committed
106 107 108 109 110 111 112 113
  /* Set legacy GNOME hints */
  atoms[0] = screen->display->atom_win_layer;
  
  XChangeProperty (screen->display->xdisplay, screen->xroot,
                   screen->display->atom_win_protocols,
                   XA_ATOM,
                   32, PropModeReplace, (guchar*) atoms, N_WIN_SUPPORTED);
  
rhp's avatar
...  
rhp committed
114 115 116 117
  return Success;
#undef N_SUPPORTED
}

rhp's avatar
...  
rhp committed
118 119 120 121 122
MetaScreen*
meta_screen_new (MetaDisplay *display,
                 int          number)
{
  MetaScreen *screen;
rhp's avatar
...  
rhp committed
123 124
  Window xroot;
  Display *xdisplay;
rhp's avatar
...  
rhp committed
125
  
rhp's avatar
...  
rhp committed
126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161
  /* 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;
    }

  /* Select our root window events */
  meta_error_trap_push (display);
  XSelectInput (xdisplay,
                xroot,
                SubstructureRedirectMask | SubstructureNotifyMask |
                ColormapChangeMask | PropertyChangeMask |
                LeaveWindowMask | EnterWindowMask |
                ButtonPressMask | ButtonReleaseMask);
  if (meta_error_trap_pop (display) != Success)
    {
      meta_warning (_("Screen %d on display '%s' already has a window manager\n"),
                    number, display->name);
      return NULL;
    }
rhp's avatar
...  
rhp committed
162 163 164
  
  screen = g_new (MetaScreen, 1);

rhp's avatar
...  
rhp committed
165
  screen->display = display;
rhp's avatar
...  
rhp committed
166
  screen->number = number;
rhp's avatar
...  
rhp committed
167
  screen->screen_name = get_screen_name (display, number);
rhp's avatar
...  
rhp committed
168
  screen->xscreen = ScreenOfDisplay (xdisplay, number);
rhp's avatar
...  
rhp committed
169
  screen->xroot = xroot;
rhp's avatar
...  
rhp committed
170 171
  screen->width = WidthOfScreen (screen->xscreen);
  screen->height = HeightOfScreen (screen->xscreen);
rhp's avatar
...  
rhp committed
172 173 174
  screen->current_cursor = -1; /* invalid/unset */
  
  meta_screen_set_cursor (screen, META_CURSOR_DEFAULT);
rhp's avatar
...  
rhp committed
175
  
rhp's avatar
...  
rhp committed
176 177 178 179 180
  if (display->leader_window == None)
    display->leader_window = XCreateSimpleWindow (display->xdisplay,
                                                  screen->xroot,
                                                  -100, -100, 1, 1, 0, 0, 0);
  
rhp's avatar
...  
rhp committed
181 182 183 184
  set_supported_hint (screen);
  
  set_wm_check_hint (screen);
  
rhp's avatar
...  
rhp committed
185 186 187 188
  /* Screens must have at least one workspace at all times,
   * so create that required workspace.
   */
  screen->active_workspace = meta_workspace_new (screen);
rhp's avatar
...  
rhp committed
189 190 191 192 193
  /* FIXME, for now there are always 6 workspaces... */
  meta_workspace_new (screen);
  meta_workspace_new (screen);
  meta_workspace_new (screen);
  meta_workspace_new (screen);
rhp's avatar
...  
rhp committed
194
  meta_workspace_new (screen);
rhp's avatar
...  
rhp committed
195

rhp's avatar
...  
rhp committed
196
  meta_screen_grab_keys (screen);
rhp's avatar
...  
rhp committed
197

rhp's avatar
...  
rhp committed
198
  screen->ui = meta_ui_new (screen->display->xdisplay,
rhp's avatar
...  
rhp committed
199
                            screen->xscreen);
rhp's avatar
...  
rhp committed
200 201

  screen->stack = meta_stack_new (screen);
rhp's avatar
...  
rhp committed
202
  
rhp's avatar
...  
rhp committed
203 204
  meta_verbose ("Added screen %d ('%s') root 0x%lx\n",
                screen->number, screen->screen_name, screen->xroot);  
rhp's avatar
...  
rhp committed
205 206 207 208 209 210
  
  return screen;
}

void
meta_screen_free (MetaScreen *screen)
rhp's avatar
...  
rhp committed
211
{  
rhp's avatar
...  
rhp committed
212 213
  meta_screen_ungrab_keys (screen);
  
rhp's avatar
...  
rhp committed
214
  meta_ui_free (screen->ui);
rhp's avatar
...  
rhp committed
215

rhp's avatar
...  
rhp committed
216 217
  meta_stack_free (screen->stack);
  
rhp's avatar
...  
rhp committed
218
  g_free (screen->screen_name);
rhp's avatar
...  
rhp committed
219 220 221
  g_free (screen);
}

rhp's avatar
...  
rhp committed
222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237
void
meta_screen_manage_all_windows (MetaScreen *screen)
{
  Window ignored1, ignored2;
  Window *children;
  unsigned int n_children;
  int i;

  /* Must grab server to avoid obvious race condition */
  meta_display_grab (screen->display);

  meta_error_trap_push (screen->display);
  
  XQueryTree (screen->display->xdisplay,
              screen->xroot,
              &ignored1, &ignored2, &children, &n_children);
rhp's avatar
...  
rhp committed
238

rhp's avatar
...  
rhp committed
239 240 241 242 243
  if (meta_error_trap_pop (screen->display))
    {
      meta_display_ungrab (screen->display);
      return;
    }
rhp's avatar
...  
rhp committed
244 245

  meta_stack_freeze (screen->stack);
rhp's avatar
...  
rhp committed
246 247 248
  i = 0;
  while (i < n_children)
    {
rhp's avatar
...  
rhp committed
249
      meta_window_new (screen->display, children[i], TRUE);
rhp's avatar
...  
rhp committed
250 251 252

      ++i;
    }
rhp's avatar
...  
rhp committed
253
  meta_stack_thaw (screen->stack);
rhp's avatar
...  
rhp committed
254 255 256 257 258 259

  meta_display_ungrab (screen->display);
  
  if (children)
    XFree (children);
}
rhp's avatar
...  
rhp committed
260 261 262 263 264 265 266 267 268 269 270 271 272

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
273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302

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
303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375

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);
        }
      
      tmp = tmp->data;
    }
  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
376

rhp's avatar
...  
rhp committed
377 378 379 380 381 382 383 384 385 386 387
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
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
int
meta_screen_get_n_workspaces (MetaScreen *screen)
{
  GList *tmp;
  int i;

  i = 0;
  tmp = screen->display->workspaces;
  while (tmp != NULL)
    {
      MetaWorkspace *w = tmp->data;

      if (w->screen == screen)
        ++i;
      
      tmp = tmp->next;
    }

  return i;

}
rhp's avatar
...  
rhp committed
410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425

void
meta_screen_set_cursor (MetaScreen *screen,
                        MetaCursor  cursor)
{
  Cursor xcursor;

  if (cursor == screen->current_cursor)
    return;

  screen->current_cursor = cursor;
  
  xcursor = meta_display_create_x_cursor (screen->display, cursor);
  XDefineCursor (screen->display->xdisplay, screen->xroot, xcursor);
  XFreeCursor (screen->display->xdisplay, xcursor);
}