screen.c 13.8 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 "colors.h"
rhp's avatar
...  
rhp committed
27
#include "uislave.h"
rhp's avatar
...  
rhp committed
28
#include "frame.h"
rhp's avatar
...  
rhp committed
29 30
#include "workspace.h"
#include "keybindings.h"
rhp's avatar
...  
rhp committed
31
#include "stack.h"
rhp's avatar
...  
rhp committed
32

rhp's avatar
...  
rhp committed
33
#include <X11/cursorfont.h>
rhp's avatar
...  
rhp committed
34
#include <X11/Xatom.h>
rhp's avatar
...  
rhp committed
35 36
#include <locale.h>
#include <string.h>
rhp's avatar
...  
rhp committed
37

rhp's avatar
...  
rhp committed
38 39 40 41 42 43 44
static void  ui_slave_func   (MetaUISlave *uislave,
                              MetaMessage *message,
                              gpointer     data);
static char* get_screen_name (MetaDisplay *display,
                              int          number);


rhp's avatar
...  
rhp committed
45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91
static int
set_wm_check_hint (MetaScreen *screen)
{
  unsigned long data[1];

  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);
  return Success;
}

static int
set_supported_hint (MetaScreen *screen)
{
#define N_SUPPORTED 17
  Atom atoms[N_SUPPORTED];

  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;
  
  XChangeProperty (screen->display->xdisplay, screen->xroot,
                   screen->display->atom_net_wm_supported,
                   XA_ATOM,
                   32, PropModeReplace, (guchar*) atoms, N_SUPPORTED);

  return Success;
#undef N_SUPPORTED
}

rhp's avatar
...  
rhp committed
92 93 94 95 96
MetaScreen*
meta_screen_new (MetaDisplay *display,
                 int          number)
{
  MetaScreen *screen;
rhp's avatar
...  
rhp committed
97 98
  Window xroot;
  Display *xdisplay;
rhp's avatar
...  
rhp committed
99
  Cursor cursor;
rhp's avatar
...  
rhp committed
100
  XGCValues vals;
rhp's avatar
...  
rhp committed
101
  
rhp's avatar
...  
rhp committed
102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137
  /* 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
138 139 140 141

  cursor = XCreateFontCursor (display->xdisplay, XC_left_ptr);
  XDefineCursor (display->xdisplay, xroot, cursor);
  XFreeCursor (display->xdisplay, cursor);
rhp's avatar
...  
rhp committed
142 143 144
  
  screen = g_new (MetaScreen, 1);

rhp's avatar
...  
rhp committed
145
  screen->display = display;
rhp's avatar
...  
rhp committed
146
  screen->number = number;
rhp's avatar
...  
rhp committed
147
  screen->screen_name = get_screen_name (display, number);
rhp's avatar
...  
rhp committed
148 149
  screen->xscreen = ScreenOfDisplay (xdisplay, number);
  screen->xroot = xroot;  
rhp's avatar
...  
rhp committed
150
  screen->pango_context = NULL;
rhp's avatar
...  
rhp committed
151
  
rhp's avatar
...  
rhp committed
152
  screen->engine = &meta_default_engine;
rhp's avatar
...  
rhp committed
153

rhp's avatar
...  
rhp committed
154 155
  screen->showing_tooltip = FALSE;

rhp's avatar
...  
rhp committed
156 157 158 159
  set_supported_hint (screen);
  
  set_wm_check_hint (screen);
  
rhp's avatar
...  
rhp committed
160 161 162 163
  /* 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
164 165 166 167 168
  /* 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
169 170
  meta_workspace_new (screen);
  
rhp's avatar
...  
rhp committed
171 172
  meta_screen_init_visual_info (screen);
  meta_screen_init_ui_colors (screen);
rhp's avatar
...  
rhp committed
173

rhp's avatar
...  
rhp committed
174 175
  meta_screen_grab_keys (screen);
  
rhp's avatar
...  
rhp committed
176 177 178 179
  screen->scratch_gc = XCreateGC (screen->display->xdisplay,
                                  screen->xroot,
                                  0,
                                  &vals);
rhp's avatar
...  
rhp committed
180
  
rhp's avatar
...  
rhp committed
181 182 183
  screen->uislave = meta_ui_slave_new (screen->screen_name,
                                       ui_slave_func,
                                       screen);
rhp's avatar
...  
rhp committed
184 185

  screen->stack = meta_stack_new (screen);
rhp's avatar
...  
rhp committed
186
  
rhp's avatar
...  
rhp committed
187 188
  meta_verbose ("Added screen %d ('%s') root 0x%lx\n",
                screen->number, screen->screen_name, screen->xroot);  
rhp's avatar
...  
rhp committed
189 190 191 192 193 194
  
  return screen;
}

void
meta_screen_free (MetaScreen *screen)
rhp's avatar
...  
rhp committed
195
{  
rhp's avatar
...  
rhp committed
196 197
  meta_screen_ungrab_keys (screen);
  
rhp's avatar
...  
rhp committed
198
  meta_ui_slave_free (screen->uislave);
rhp's avatar
...  
rhp committed
199

rhp's avatar
...  
rhp committed
200 201
  meta_stack_free (screen->stack);
  
rhp's avatar
...  
rhp committed
202 203 204
  XFreeGC (screen->display->xdisplay,
           screen->scratch_gc);
  
rhp's avatar
...  
rhp committed
205 206
  if (screen->pango_context)
    g_object_unref (G_OBJECT (screen->pango_context));
rhp's avatar
...  
rhp committed
207
  g_free (screen->screen_name);
rhp's avatar
...  
rhp committed
208 209 210
  g_free (screen);
}

rhp's avatar
...  
rhp committed
211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226
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
227

rhp's avatar
...  
rhp committed
228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246
  if (meta_error_trap_pop (screen->display))
    {
      meta_display_ungrab (screen->display);
      return;
    }
  
  i = 0;
  while (i < n_children)
    {
      meta_window_new (screen->display, children[i]);

      ++i;
    }

  meta_display_ungrab (screen->display);
  
  if (children)
    XFree (children);
}
rhp's avatar
...  
rhp committed
247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363

static GC
get_gc_func (PangoContext *context, PangoColor *color, GC base_gc)
{
  MetaScreen *screen;
  GC new_gc;
  XGCValues vals;
  int copy_mask = (GCFunction | GCPlaneMask | GCForeground | GCBackground |
                   GCLineWidth | GCLineStyle | GCCapStyle | GCJoinStyle |
                   GCFillStyle | GCFillRule | GCTile | GCStipple | GCTileStipXOrigin |
                   GCTileStipYOrigin | GCFont | GCSubwindowMode |
                   GCGraphicsExposures | GCClipXOrigin | GCClipYOrigin |
                   GCDashOffset | GCArcMode);

  screen = g_object_get_data (G_OBJECT (context), "meta-screen");
  
  new_gc = XCreateGC (screen->display->xdisplay,
                      screen->xroot,
                      0, 
                      &vals);

  XCopyGC (screen->display->xdisplay, base_gc, copy_mask, new_gc);

  vals.foreground = meta_screen_get_x_pixel (screen, color);
  XChangeGC (screen->display->xdisplay, new_gc, GCForeground, &vals);

  return new_gc;
}

static void
free_gc_func (PangoContext *context, GC gc)
{
  MetaScreen *screen;

  screen = g_object_get_data (G_OBJECT (context), "meta-screen");

  XFreeGC (screen->display->xdisplay, gc);
}

static char*
get_default_language (void)
{
  /* Copied from GTK, Copyright 2001 Red Hat Inc. */
  gchar *lang;
  gchar *p;
  
  lang = g_strdup (setlocale (LC_CTYPE, NULL));
  p = strchr (lang, '.');
  if (p)
    *p = '\0';
  p = strchr (lang, '@');
  if (p)
    *p = '\0';

  return lang;
}

PangoContext*
meta_screen_get_pango_context (MetaScreen *screen,
                               const PangoFontDescription *desc,
                               PangoDirection direction)
{
  if (screen->pango_context == NULL)
    {
      PangoContext *ctx;
      char *lang;
      
      /* Copied from GDK, Copyright 2001 Red Hat, Inc. */
#ifdef HAVE_XFT
      static int use_xft = -1;
      if (use_xft == -1)
        {
          char *val = g_getenv ("META_USE_XFT");
          
          use_xft = val && (atoi (val) != 0);
        }
      
      if (use_xft)
        ctx = pango_xft_get_context (screen->display, screen->number);
      else
#endif /* HAVE_XFT */
        ctx = pango_x_get_context (screen->display->xdisplay);

      g_object_set_data (G_OBJECT (ctx), "meta-screen", screen);

      pango_x_context_set_funcs (ctx, get_gc_func, free_gc_func);
      
      lang = get_default_language ();  
      pango_context_set_lang (ctx, lang);
      g_free (lang);

      /* FIXME these two lines are wrong;
       * we should be storing a context for each direction/desc,
       * so that the args to meta_screen_get_pango_context()
       * are honored.
       */
      pango_context_set_base_dir (ctx, direction);
      pango_context_set_font_description (ctx, desc);
      
      screen->pango_context = ctx;
    }
  
  return screen->pango_context;
}

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
364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424

static void
ui_slave_func (MetaUISlave *uislave,
               MetaMessage *message,
               gpointer     data)
{
  switch (message->header.message_code)
    {
    case MetaMessageCheckCode:
      meta_verbose ("Received UI slave check message version: %s host alias: %s messages version: %d\n",
                    message->check.metacity_version,
                    message->check.host_alias,
                    message->check.messages_version);

      if (strcmp (message->check.metacity_version, VERSION) != 0 ||
          strcmp (message->check.host_alias, HOST_ALIAS) != 0 ||
          message->check.messages_version != META_MESSAGES_VERSION)
        {
          meta_warning ("metacity-uislave has the wrong version; must use the one compiled with metacity\n");
          meta_ui_slave_disable (uislave);
        }
      
      break;

    default:
      meta_verbose ("Received unhandled message from UI slave: %d\n",
                    message->header.message_code);
      break;
    }
}


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
425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497

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
498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519


void
meta_screen_show_tip (MetaScreen *screen,
                      int         root_x,
                      int         root_y,
                      const char *markup)
{
  /* even if screen->showing_tip, may change position/text */
  meta_ui_slave_show_tip (screen->uislave, root_x, root_y, markup);
  screen->showing_tooltip = TRUE;
}

void
meta_screen_hide_tip (MetaScreen *screen)
{
  if (screen->showing_tooltip)
    {
      meta_ui_slave_hide_tip (screen->uislave);
      screen->showing_tooltip = FALSE;
    }
}
rhp's avatar
rhp committed
520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541

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;

}