screen.c 13.7 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

rhp's avatar
...  
rhp committed
32
#include <X11/cursorfont.h>
rhp's avatar
...  
rhp committed
33
#include <X11/Xatom.h>
rhp's avatar
...  
rhp committed
34
35
#include <locale.h>
#include <string.h>
rhp's avatar
...  
rhp committed
36

rhp's avatar
...  
rhp committed
37
38
39
40
41
42
43
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
44
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
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
91
92
93
94
95
MetaScreen*
meta_screen_new (MetaDisplay *display,
                 int          number)
{
  MetaScreen *screen;
rhp's avatar
...  
rhp committed
96
97
  Window xroot;
  Display *xdisplay;
rhp's avatar
...  
rhp committed
98
  Cursor cursor;
rhp's avatar
...  
rhp committed
99
  XGCValues vals;
rhp's avatar
...  
rhp committed
100
  
rhp's avatar
...  
rhp committed
101
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
  /* 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
137
138
139
140

  cursor = XCreateFontCursor (display->xdisplay, XC_left_ptr);
  XDefineCursor (display->xdisplay, xroot, cursor);
  XFreeCursor (display->xdisplay, cursor);
rhp's avatar
...  
rhp committed
141
142
143
  
  screen = g_new (MetaScreen, 1);

rhp's avatar
...  
rhp committed
144
  screen->display = display;
rhp's avatar
...  
rhp committed
145
  screen->number = number;
rhp's avatar
...  
rhp committed
146
  screen->screen_name = get_screen_name (display, number);
rhp's avatar
...  
rhp committed
147
148
  screen->xscreen = ScreenOfDisplay (xdisplay, number);
  screen->xroot = xroot;  
rhp's avatar
...  
rhp committed
149
  screen->pango_context = NULL;
rhp's avatar
...  
rhp committed
150
  
rhp's avatar
...  
rhp committed
151
  screen->engine = &meta_default_engine;
rhp's avatar
...  
rhp committed
152

rhp's avatar
...  
rhp committed
153
154
  screen->showing_tooltip = FALSE;

rhp's avatar
...  
rhp committed
155
156
157
158
  set_supported_hint (screen);
  
  set_wm_check_hint (screen);
  
rhp's avatar
...  
rhp committed
159
160
161
162
  /* 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
163
164
165
166
167
  /* 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
168
169
  meta_workspace_new (screen);
  
rhp's avatar
...  
rhp committed
170
171
  meta_screen_init_visual_info (screen);
  meta_screen_init_ui_colors (screen);
rhp's avatar
...  
rhp committed
172

rhp's avatar
...  
rhp committed
173
174
  meta_screen_grab_keys (screen);
  
rhp's avatar
...  
rhp committed
175
176
177
178
  screen->scratch_gc = XCreateGC (screen->display->xdisplay,
                                  screen->xroot,
                                  0,
                                  &vals);
rhp's avatar
...  
rhp committed
179
  
rhp's avatar
...  
rhp committed
180
181
182
  screen->uislave = meta_ui_slave_new (screen->screen_name,
                                       ui_slave_func,
                                       screen);
rhp's avatar
...  
rhp committed
183
  
rhp's avatar
...  
rhp committed
184
185
  meta_verbose ("Added screen %d ('%s') root 0x%lx\n",
                screen->number, screen->screen_name, screen->xroot);  
rhp's avatar
...  
rhp committed
186
187
188
189
190
191
192
  
  return screen;
}

void
meta_screen_free (MetaScreen *screen)
{
rhp's avatar
...  
rhp committed
193
194
  meta_screen_ungrab_keys (screen);
  
rhp's avatar
...  
rhp committed
195
  meta_ui_slave_free (screen->uislave);
rhp's avatar
...  
rhp committed
196
197
198
199

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

rhp's avatar
...  
rhp committed
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
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
222

rhp's avatar
...  
rhp committed
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
  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
242
243
244
245
246
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

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
359
360
361
362
363
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

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
420
421
422
423
424
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

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
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514


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
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536

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;

}