Pileus Git - ~andy/gtk/blob - gdk/x11/gdkevents-x11.c

   1 /* GDK - The GIMP Drawing Kit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include "gdk.h"
  28 #include "gdkprivate-x11.h"
  29 #include "gdkinternals.h"
  30 #include "gdkx.h"
  31 #include "gdkscreen-x11.h"
  32 #include "gdkdisplay-x11.h"
  33 #include "gdkasync.h"
  34
  35 #include "gdkkeysyms.h"
  36
  37 #include "xsettings-client.h"
  38
  39 #if HAVE_CONFIG_H
  40 #  include <config.h>
  41 #  if STDC_HEADERS
  42 #    include <string.h>
  43 #  endif
  44 #endif
  45
  46 #include "gdkinputprivate.h"
  47
  48 #ifdef HAVE_XKB
  49 #include <X11/XKBlib.h>
  50 #endif
  51
  52 #include <X11/Xatom.h>
  53
  54 typedef struct _GdkIOClosure GdkIOClosure;
  55 typedef struct _GdkDisplaySource GdkDisplaySource;
  56 typedef struct _GdkEventTypeX11 GdkEventTypeX11;
  57
  58 struct _GdkIOClosure
  59 {
  60   GdkInputFunction function;
  61   GdkInputCondition condition;
  62   GdkDestroyNotify notify;
  63   gpointer data;
  64 };
  65
  66 struct _GdkDisplaySource
  67 {
  68   GSource source;
  69
  70   GdkDisplay *display;
  71   GPollFD event_poll_fd;
  72 };
  73
  74 struct _GdkEventTypeX11
  75 {
  76   gint base;
  77   gint n_events;
  78 };
  79
  80 /*
  81  * Private function declarations
  82  */
  83
  84 static gint      gdk_event_apply_filters (XEvent   *xevent,
  85                                           GdkEvent *event,
  86                                           GList    *filters);
  87 static gboolean  gdk_event_translate     (GdkDisplay *display,
  88                                           GdkEvent   *event,
  89                                           XEvent     *xevent,
  90                                           gboolean    return_exposes);
  91
  92 static gboolean gdk_event_prepare  (GSource     *source,
  93                                     gint        *timeout);
  94 static gboolean gdk_event_check    (GSource     *source);
  95 static gboolean gdk_event_dispatch (GSource     *source,
  96                                     GSourceFunc  callback,
  97                                     gpointer     user_data);
  98
  99 static GdkFilterReturn gdk_wm_protocols_filter (GdkXEvent *xev,
 100                                                 GdkEvent  *event,
 101                                                 gpointer   data);
 102
 103 static GSource *gdk_display_source_new (GdkDisplay *display);
 104 static gboolean gdk_check_xpending     (GdkDisplay *display);
 105
 106 static void gdk_xsettings_watch_cb  (Window            window,
 107                                      Bool              is_start,
 108                                      long              mask,
 109                                      void             *cb_data);
 110 static void gdk_xsettings_notify_cb (const char       *name,
 111                                      XSettingsAction   action,
 112                                      XSettingsSetting *setting,
 113                                      void             *data);
 114
 115 /* Private variable declarations
 116  */
 117
 118 static GList *display_sources;
 119
 120 static GSourceFuncs event_funcs = {
 121   gdk_event_prepare,
 122   gdk_event_check,
 123   gdk_event_dispatch,
 124   NULL
 125 };
 126
 127 static GSource *
 128 gdk_display_source_new (GdkDisplay *display)
 129 {
 130   GSource *source = g_source_new (&event_funcs, sizeof (GdkDisplaySource));
 131   GdkDisplaySource *display_source = (GdkDisplaySource *)source;
 132
 133   display_source->display = display;
 134
 135   return source;
 136 }
 137
 138 static gboolean
 139 gdk_check_xpending (GdkDisplay *display)
 140 {
 141   return XPending (GDK_DISPLAY_XDISPLAY (display));
 142 }
 143
 144 /*********************************************
 145  * Functions for maintaining the event queue *
 146  *********************************************/
 147
 148 static void
 149 refcounted_grab_server (Display *xdisplay)
 150 {
 151   GdkDisplay *display = gdk_x11_lookup_xdisplay (xdisplay);
 152
 153   gdk_x11_display_grab (display);
 154 }
 155
 156 static void
 157 refcounted_ungrab_server (Display *xdisplay)
 158 {
 159   GdkDisplay *display = gdk_x11_lookup_xdisplay (xdisplay);
 160
 161   gdk_x11_display_ungrab (display);
 162 }
 163
 164 void
 165 _gdk_x11_events_init_screen (GdkScreen *screen)
 166 {
 167   GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
 168
 169   /* Keep a flag to avoid extra notifies that we don't need
 170    */
 171   screen_x11->xsettings_in_init = TRUE;
 172   screen_x11->xsettings_client = xsettings_client_new (screen_x11->xdisplay,
 173                                                        screen_x11->screen_num,
 174                                                        gdk_xsettings_notify_cb,
 175                                                        gdk_xsettings_watch_cb,
 176                                                        screen);
 177   xsettings_client_set_grab_func (screen_x11->xsettings_client,
 178                                   refcounted_grab_server);
 179   xsettings_client_set_ungrab_func (screen_x11->xsettings_client,
 180                                     refcounted_ungrab_server);
 181   screen_x11->xsettings_in_init = FALSE;
 182 }
 183
 184 void
 185 _gdk_x11_events_uninit_screen (GdkScreen *screen)
 186 {
 187   GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
 188
 189   xsettings_client_destroy (screen_x11->xsettings_client);
 190   screen_x11->xsettings_client = NULL;
 191 }
 192
 193 void
 194 _gdk_events_init (GdkDisplay *display)
 195 {
 196   GSource *source;
 197   GdkDisplaySource *display_source;
 198   GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
 199
 200   int connection_number = ConnectionNumber (display_x11->xdisplay);
 201   GDK_NOTE (MISC, g_message ("connection number: %d", connection_number));
 202
 203
 204   source = display_x11->event_source = gdk_display_source_new (display);
 205   display_source = (GdkDisplaySource*) source;
 206   g_source_set_priority (source, GDK_PRIORITY_EVENTS);
 207
 208   display_source->event_poll_fd.fd = connection_number;
 209   display_source->event_poll_fd.events = G_IO_IN;
 210
 211   g_source_add_poll (source, &display_source->event_poll_fd);
 212   g_source_set_can_recurse (source, TRUE);
 213   g_source_attach (source, NULL);
 214
 215   display_sources = g_list_prepend (display_sources,display_source);
 216
 217   gdk_display_add_client_message_filter (
 218         display,
 219         gdk_atom_intern ("WM_PROTOCOLS", FALSE),
 220         gdk_wm_protocols_filter,
 221         NULL);
 222 }
 223
 224
 225 /**
 226  * gdk_events_pending:
 227  *
 228  * Checks if any events are ready to be processed for any display.
 229  *
 230  * Return value:  %TRUE if any events are pending.
 231  **/
 232 gboolean
 233 gdk_events_pending (void)
 234 {
 235   GList *tmp_list;
 236
 237   for (tmp_list = display_sources; tmp_list; tmp_list = tmp_list->next)
 238     {
 239       GdkDisplaySource *tmp_source = tmp_list->data;
 240       GdkDisplay *display = tmp_source->display;
 241
 242       if (_gdk_event_queue_find_first (display))
 243         return TRUE;
 244     }
 245
 246   for (tmp_list = display_sources; tmp_list; tmp_list = tmp_list->next)
 247     {
 248       GdkDisplaySource *tmp_source = tmp_list->data;
 249       GdkDisplay *display = tmp_source->display;
 250
 251       if (gdk_check_xpending (display))
 252         return TRUE;
 253     }
 254
 255   return FALSE;
 256 }
 257
 258 static Bool
 259 graphics_expose_predicate (Display  *display,
 260                            XEvent   *xevent,
 261                            XPointer  arg)
 262 {
 263   if (xevent->xany.window == GDK_DRAWABLE_XID ((GdkDrawable *)arg) &&
 264       (xevent->xany.type == GraphicsExpose ||
 265        xevent->xany.type == NoExpose))
 266     return True;
 267   else
 268     return False;
 269 }
 270
 271 /**
 272  * gdk_event_get_graphics_expose:
 273  * @window: the #GdkWindow to wait for the events for.
 274  *
 275  * Waits for a GraphicsExpose or NoExpose event from the X server.
 276  * This is used in the #GtkText and #GtkCList widgets in GTK+ to make sure any
 277  * GraphicsExpose events are handled before the widget is scrolled.
 278  *
 279  * Return value:  a #GdkEventExpose if a GraphicsExpose was received, or %NULL if a
 280  * NoExpose event was received.
 281  **/
 282 GdkEvent*
 283 gdk_event_get_graphics_expose (GdkWindow *window)
 284 {
 285   XEvent xevent;
 286   GdkEvent *event;
 287
 288   g_return_val_if_fail (window != NULL, NULL);
 289
 290   XIfEvent (GDK_WINDOW_XDISPLAY (window), &xevent,
 291             graphics_expose_predicate, (XPointer) window);
 292
 293   if (xevent.xany.type == GraphicsExpose)
 294     {
 295       event = gdk_event_new (GDK_NOTHING);
 296
 297       if (gdk_event_translate (GDK_WINDOW_DISPLAY (window), event,
 298                                &xevent, TRUE))
 299         return event;
 300       else
 301         gdk_event_free (event);
 302     }
 303
 304   return NULL;
 305 }
 306
 307 static gint
 308 gdk_event_apply_filters (XEvent *xevent,
 309                          GdkEvent *event,
 310                          GList *filters)
 311 {
 312   GList *tmp_list;
 313   GdkFilterReturn result;
 314
 315   tmp_list = filters;
 316
 317   while (tmp_list)
 318     {
 319       GdkEventFilter *filter = (GdkEventFilter*) tmp_list->data;
 320
 321       tmp_list = tmp_list->next;
 322       result = filter->function (xevent, event, filter->data);
 323       if (result !=  GDK_FILTER_CONTINUE)
 324         return result;
 325     }
 326
 327   return GDK_FILTER_CONTINUE;
 328 }
 329
 330 /**
 331  * gdk_display_add_client_message_filter:
 332  * @display: a #GdkDisplay for which this message filter applies
 333  * @message_type: the type of ClientMessage events to receive.
 334  *   This will be checked against the @message_type field
 335  *   of the XClientMessage event struct.
 336  * @func: the function to call to process the event.
 337  * @data: user data to pass to @func.
 338  *
 339  * Adds a filter to be called when X ClientMessage events are received.
 340  *
 341  * Since: 2.2
 342  **/
 343 void
 344 gdk_display_add_client_message_filter (GdkDisplay   *display,
 345                                        GdkAtom       message_type,
 346                                        GdkFilterFunc func,
 347                                        gpointer      data)
 348 {
 349   GdkClientFilter *filter;
 350   g_return_if_fail (GDK_IS_DISPLAY (display));
 351   filter = g_new (GdkClientFilter, 1);
 352
 353   filter->type = message_type;
 354   filter->function = func;
 355   filter->data = data;
 356
 357   GDK_DISPLAY_X11(display)->client_filters =
 358     g_list_prepend (GDK_DISPLAY_X11 (display)->client_filters,
 359                     filter);
 360 }
 361
 362 /**
 363  * gdk_add_client_message_filter:
 364  * @message_type: the type of ClientMessage events to receive. This will be
 365  *     checked against the <structfield>message_type</structfield> field of the
 366  *     XClientMessage event struct.
 367  * @func: the function to call to process the event.
 368  * @data: user data to pass to @func.
 369  *
 370  * Adds a filter to the default display to be called when X ClientMessage events
 371  * are received. See gdk_display_add_client_message_filter().
 372  **/
 373 void
 374 gdk_add_client_message_filter (GdkAtom       message_type,
 375                                GdkFilterFunc func,
 376                                gpointer      data)
 377 {
 378   gdk_display_add_client_message_filter (gdk_display_get_default (),
 379                                          message_type, func, data);
 380 }
 381
 382 static void
 383 do_net_wm_state_changes (GdkWindow *window)
 384 {
 385   GdkToplevelX11 *toplevel = _gdk_x11_window_get_toplevel (window);
 386   GdkWindowState old_state;
 387
 388   if (GDK_WINDOW_DESTROYED (window) ||
 389       gdk_window_get_window_type (window) != GDK_WINDOW_TOPLEVEL)
 390     return;
 391
 392   old_state = gdk_window_get_state (window);
 393
 394   /* For found_sticky to remain TRUE, we have to also be on desktop
 395    * 0xFFFFFFFF
 396    */
 397   if (old_state & GDK_WINDOW_STATE_STICKY)
 398     {
 399       if (!(toplevel->have_sticky && toplevel->on_all_desktops))
 400         gdk_synthesize_window_state (window,
 401                                      GDK_WINDOW_STATE_STICKY,
 402                                      0);
 403     }
 404   else
 405     {
 406       if (toplevel->have_sticky && toplevel->on_all_desktops)
 407         gdk_synthesize_window_state (window,
 408                                      0,
 409                                      GDK_WINDOW_STATE_STICKY);
 410     }
 411
 412   if (old_state & GDK_WINDOW_STATE_FULLSCREEN)
 413     {
 414       if (!toplevel->have_fullscreen)
 415         gdk_synthesize_window_state (window,
 416                                      GDK_WINDOW_STATE_FULLSCREEN,
 417                                      0);
 418     }
 419   else
 420     {
 421       if (toplevel->have_fullscreen)
 422         gdk_synthesize_window_state (window,
 423                                      0,
 424                                      GDK_WINDOW_STATE_FULLSCREEN);
 425     }
 426
 427   /* Our "maximized" means both vertical and horizontal; if only one,
 428    * we don't expose that via GDK
 429    */
 430   if (old_state & GDK_WINDOW_STATE_MAXIMIZED)
 431     {
 432       if (!(toplevel->have_maxvert && toplevel->have_maxhorz))
 433         gdk_synthesize_window_state (window,
 434                                      GDK_WINDOW_STATE_MAXIMIZED,
 435                                      0);
 436     }
 437   else
 438     {
 439       if (toplevel->have_maxvert && toplevel->have_maxhorz)
 440         gdk_synthesize_window_state (window,
 441                                      0,
 442                                      GDK_WINDOW_STATE_MAXIMIZED);
 443     }
 444 }
 445
 446 static void
 447 gdk_check_wm_desktop_changed (GdkWindow *window)
 448 {
 449   GdkToplevelX11 *toplevel = _gdk_x11_window_get_toplevel (window);
 450   GdkDisplay *display = GDK_WINDOW_DISPLAY (window);
 451
 452   Atom type;
 453   gint format;
 454   gulong nitems;
 455   gulong bytes_after;
 456
 457   if (toplevel->have_sticky)
 458     {
 459       gulong *desktop;
 460
 461       XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display),
 462                           GDK_WINDOW_XID (window),
 463                           gdk_x11_get_xatom_by_name_for_display (display, "_NET_WM_DESKTOP"),
 464                           0, G_MAXLONG, False, XA_CARDINAL, &type,
 465                           &format, &nitems,
 466                           &bytes_after, (guchar **)&desktop);
 467
 468       if (type != None)
 469         {
 470           toplevel->on_all_desktops = (*desktop == 0xFFFFFFFF);
 471           XFree (desktop);
 472         }
 473       else
 474         toplevel->on_all_desktops = FALSE;
 475
 476       do_net_wm_state_changes (window);
 477     }
 478 }
 479
 480 static void
 481 gdk_check_wm_state_changed (GdkWindow *window)
 482 {
 483   GdkToplevelX11 *toplevel = _gdk_x11_window_get_toplevel (window);
 484   GdkDisplay *display = GDK_WINDOW_DISPLAY (window);
 485
 486   Atom type;
 487   gint format;
 488   gulong nitems;
 489   gulong bytes_after;
 490   Atom *atoms = NULL;
 491   gulong i;
 492
 493   gboolean had_sticky = toplevel->have_sticky;
 494
 495   toplevel->have_sticky = FALSE;
 496   toplevel->have_maxvert = FALSE;
 497   toplevel->have_maxhorz = FALSE;
 498   toplevel->have_fullscreen = FALSE;
 499
 500   XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), GDK_WINDOW_XID (window),
 501                       gdk_x11_get_xatom_by_name_for_display (display, "_NET_WM_STATE"),
 502                       0, G_MAXLONG, False, XA_ATOM, &type, &format, &nitems,
 503                       &bytes_after, (guchar **)&atoms);
 504
 505   if (type != None)
 506     {
 507       Atom sticky_atom = gdk_x11_get_xatom_by_name_for_display (display, "_NET_WM_STATE_STICKY");
 508       Atom maxvert_atom = gdk_x11_get_xatom_by_name_for_display (display, "_NET_WM_STATE_MAXIMIZED_VERT");
 509       Atom maxhorz_atom = gdk_x11_get_xatom_by_name_for_display (display, "_NET_WM_STATE_MAXIMIZED_HORZ");
 510       Atom fullscreen_atom = gdk_x11_get_xatom_by_name_for_display (display, "_NET_WM_STATE_FULLSCREEN");
 511
 512       i = 0;
 513       while (i < nitems)
 514         {
 515           if (atoms[i] == sticky_atom)
 516             toplevel->have_sticky = TRUE;
 517           else if (atoms[i] == maxvert_atom)
 518             toplevel->have_maxvert = TRUE;
 519           else if (atoms[i] == maxhorz_atom)
 520             toplevel->have_maxhorz = TRUE;
 521           else if (atoms[i] == fullscreen_atom)
 522             toplevel->have_fullscreen = TRUE;
 523
 524           ++i;
 525         }
 526
 527       XFree (atoms);
 528     }
 529
 530   /* When have_sticky is turned on, we have to check the DESKTOP property
 531    * as well.
 532    */
 533   if (toplevel->have_sticky && !had_sticky)
 534     gdk_check_wm_desktop_changed (window);
 535   else
 536     do_net_wm_state_changes (window);
 537 }
 538
 539 #define HAS_FOCUS(toplevel)                           \
 540   ((toplevel)->has_focus || (toplevel)->has_pointer_focus)
 541
 542 static void
 543 generate_focus_event (GdkWindow *window,
 544                       gboolean   in)
 545 {
 546   GdkEvent event;
 547
 548   event.type = GDK_FOCUS_CHANGE;
 549   event.focus_change.window = window;
 550   event.focus_change.send_event = FALSE;
 551   event.focus_change.in = in;
 552
 553   gdk_event_put (&event);
 554 }
 555
 556 static void
 557 set_screen_from_root (GdkDisplay *display,
 558                       GdkEvent   *event,
 559                       Window      xrootwin)
 560 {
 561   GdkScreen *screen;
 562
 563   screen = _gdk_x11_display_screen_for_xrootwin (display, xrootwin);
 564   g_assert (screen);
 565
 566   gdk_event_set_screen (event, screen);
 567 }
 568
 569 static void
 570 translate_key_event (GdkDisplay *display,
 571                      GdkEvent   *event,
 572                      XEvent     *xevent)
 573 {
 574   GdkKeymap *keymap = gdk_keymap_get_for_display (display);
 575   gunichar c = 0;
 576   guchar buf[7];
 577
 578   event->key.type = xevent->xany.type == KeyPress ? GDK_KEY_PRESS : GDK_KEY_RELEASE;
 579   event->key.time = xevent->xkey.time;
 580
 581   event->key.state = (GdkModifierType) xevent->xkey.state;
 582   event->key.group = _gdk_x11_get_group_for_state (display, xevent->xkey.state);
 583   event->key.hardware_keycode = xevent->xkey.keycode;
 584
 585   event->key.keyval = GDK_VoidSymbol;
 586
 587   gdk_keymap_translate_keyboard_state (keymap,
 588                                        event->key.hardware_keycode,
 589                                        event->key.state,
 590                                        event->key.group,
 591                                        &event->key.keyval,
 592                                        NULL, NULL, NULL);
 593
 594   /* Fill in event->string crudely, since various programs
 595    * depend on it.
 596    */
 597   event->key.string = NULL;
 598
 599   if (event->key.keyval != GDK_VoidSymbol)
 600     c = gdk_keyval_to_unicode (event->key.keyval);
 601
 602   if (c)
 603     {
 604       gsize bytes_written;
 605       gint len;
 606
 607       /* Apply the control key - Taken from Xlib
 608        */
 609       if (event->key.state & GDK_CONTROL_MASK)
 610         {
 611           if ((c >= '@' && c < '\177') || c == ' ') c &= 0x1F;
 612           else if (c == '2')
 613             {
 614               event->key.string = g_memdup ("\0\0", 2);
 615               event->key.length = 1;
 616               buf[0] = '\0';
 617               goto out;
 618             }
 619           else if (c >= '3' && c <= '7') c -= ('3' - '\033');
 620           else if (c == '8') c = '\177';
 621           else if (c == '/') c = '_' & 0x1F;
 622         }
 623
 624       len = g_unichar_to_utf8 (c, buf);
 625       buf[len] = '\0';
 626
 627       event->key.string = g_locale_from_utf8 (buf, len,
 628                                               NULL, &bytes_written,
 629                                               NULL);
 630       if (event->key.string)
 631         event->key.length = bytes_written;
 632     }
 633   else if (event->key.keyval == GDK_Escape)
 634     {
 635       event->key.length = 1;
 636       event->key.string = g_strdup ("\033");
 637     }
 638   else if (event->key.keyval == GDK_Return ||
 639           event->key.keyval == GDK_KP_Enter)
 640     {
 641       event->key.length = 1;
 642       event->key.string = g_strdup ("\r");
 643     }
 644
 645   if (!event->key.string)
 646     {
 647       event->key.length = 0;
 648       event->key.string = g_strdup ("");
 649     }
 650
 651  out:
 652 #ifdef G_ENABLE_DEBUG
 653   if (_gdk_debug_flags & GDK_DEBUG_EVENTS)
 654     {
 655       g_message ("%s:\t\twindow: %ld     key: %12s  %d",
 656                  event->type == GDK_KEY_PRESS ? "key press  " : "key release",
 657                  xevent->xkey.window,
 658                  event->key.keyval ? gdk_keyval_name (event->key.keyval) : "(none)",
 659                  event->key.keyval);
 660
 661       if (event->key.length > 0)
 662         g_message ("\t\tlength: %4d string: \"%s\"",
 663                    event->key.length, buf);
 664     }
 665 #endif /* G_ENABLE_DEBUG */
 666   return;
 667 }
 668
 669 /**
 670  * gdk_x11_register_standard_event_type:
 671  * @display: a #GdkDisplay
 672  * @event_base: first event type code to register
 673  * @n_events: number of event type codes to register
 674  *
 675  * Registers interest in receiving extension events with type codes
 676  * between @event_base and <literal>event_base + n_events - 1</literal>.
 677  * The registered events must have the window field in the same place
 678  * as core X events (this is not the case for e.g. XKB extension events).
 679  *
 680  * If an event type is registered, events of this type will go through
 681  * global and window-specific filters (see gdk_window_add_filter()).
 682  * Unregistered events will only go through global filters.
 683  * GDK may register the events of some X extensions on its own.
 684  *
 685  * This function should only be needed in unusual circumstances, e.g.
 686  * when filtering XInput extension events on the root window.
 687  *
 688  * Since: 2.4
 689  **/
 690 void
 691 gdk_x11_register_standard_event_type (GdkDisplay          *display,
 692                                       gint                 event_base,
 693                                       gint                 n_events)
 694 {
 695   GdkEventTypeX11 *event_type;
 696   GdkDisplayX11 *display_x11;
 697
 698   display_x11 = GDK_DISPLAY_X11 (display);
 699   event_type = g_new (GdkEventTypeX11, 1);
 700
 701   event_type->base = event_base;
 702   event_type->n_events = n_events;
 703
 704   display_x11->event_types = g_slist_prepend (display_x11->event_types, event_type);
 705 }
 706
 707 /* Return the window this has to do with, if any, rather
 708  * than the frame or root window that was selecting
 709  * for substructure
 710  */
 711 static void
 712 get_real_window (GdkDisplay *display,
 713                  XEvent     *event,
 714                  Window     *event_window,
 715                  Window     *filter_window)
 716 {
 717   /* Core events all have an event->xany.window field, but that's
 718    * not true for extension events
 719    */
 720   if (event->type >= KeyPress &&
 721       event->type <= MappingNotify)
 722     {
 723       *filter_window = event->xany.window;
 724       switch (event->type)
 725         {
 726         case CreateNotify:
 727           *event_window = event->xcreatewindow.window;
 728           break;
 729         case DestroyNotify:
 730           *event_window = event->xdestroywindow.window;
 731           break;
 732         case UnmapNotify:
 733           *event_window = event->xunmap.window;
 734           break;
 735         case MapNotify:
 736           *event_window = event->xmap.window;
 737           break;
 738         case MapRequest:
 739           *event_window = event->xmaprequest.window;
 740           break;
 741         case ReparentNotify:
 742           *event_window = event->xreparent.window;
 743           break;
 744         case ConfigureNotify:
 745           *event_window = event->xconfigure.window;
 746           break;
 747         case ConfigureRequest:
 748           *event_window = event->xconfigurerequest.window;
 749           break;
 750         case GravityNotify:
 751           *event_window = event->xgravity.window;
 752           break;
 753         case CirculateNotify:
 754           *event_window = event->xcirculate.window;
 755           break;
 756         case CirculateRequest:
 757           *event_window = event->xcirculaterequest.window;
 758           break;
 759         default:
 760           *event_window = event->xany.window;
 761         }
 762     }
 763   else
 764     {
 765       GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
 766       GSList *tmp_list;
 767
 768       for (tmp_list = display_x11->event_types;
 769            tmp_list;
 770            tmp_list = tmp_list->next)
 771         {
 772           GdkEventTypeX11 *event_type = tmp_list->data;
 773
 774           if (event->type >= event_type->base &&
 775               event->type < event_type->base + event_type->n_events)
 776             {
 777               *event_window = event->xany.window;
 778               *filter_window = event->xany.window;
 779               return;
 780             }
 781         }
 782
 783       *event_window = None;
 784       *filter_window = None;
 785     }
 786 }
 787
 788 #ifdef G_ENABLE_DEBUG
 789 static const char notify_modes[][18] = {
 790   "NotifyNormal",
 791   "NotifyGrab",
 792   "NotifyUngrab",
 793   "NotifyWhileGrabbed"
 794 };
 795
 796 static const char notify_details[][22] = {
 797   "NotifyAncestor",
 798   "NotifyVirtual",
 799   "NotifyInferior",
 800   "NotifyNonlinear",
 801   "NotifyNonlinearVirtual",
 802   "NotifyPointer",
 803   "NotifyPointerRoot",
 804   "NotifyDetailNone"
 805 };
 806 #endif
 807
 808 static gboolean
 809 gdk_event_translate (GdkDisplay *display,
 810                      GdkEvent   *event,
 811                      XEvent     *xevent,
 812                      gboolean    return_exposes)
 813 {
 814
 815   GdkWindow *window;
 816   GdkWindowObject *window_private;
 817   GdkWindow *filter_window;
 818   GdkWindowImplX11 *window_impl = NULL;
 819   gboolean return_val;
 820   gint xoffset, yoffset;
 821   GdkScreen *screen = NULL;
 822   GdkScreenX11 *screen_x11 = NULL;
 823   GdkToplevelX11 *toplevel = NULL;
 824   GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
 825   Window xwindow, filter_xwindow;
 826
 827   return_val = FALSE;
 828
 829   /* init these, since the done: block uses them */
 830   window = NULL;
 831   window_private = NULL;
 832   event->any.window = NULL;
 833
 834   if (_gdk_default_filters)
 835     {
 836       /* Apply global filters */
 837       GdkFilterReturn result;
 838       result = gdk_event_apply_filters (xevent, event,
 839                                         _gdk_default_filters);
 840
 841       if (result != GDK_FILTER_CONTINUE)
 842         {
 843           return_val = (result == GDK_FILTER_TRANSLATE) ? TRUE : FALSE;
 844           goto done;
 845         }
 846     }
 847
 848   /* Find the GdkWindow that this event relates to.
 849    * Basically this means substructure events
 850    * are reported same as structure events
 851    */
 852   get_real_window (display, xevent, &xwindow, &filter_xwindow);
 853
 854   window = gdk_window_lookup_for_display (display, xwindow);
 855   /* We may receive events such as NoExpose/GraphicsExpose
 856    * and ShmCompletion for pixmaps
 857    */
 858   if (window && !GDK_IS_WINDOW (window))
 859     window = NULL;
 860   window_private = (GdkWindowObject *) window;
 861
 862   /* We always run the filters for the window where the event
 863    * is delivered, not the window that it relates to
 864    */
 865   if (filter_xwindow == xwindow)
 866     filter_window = window;
 867   else
 868     {
 869       filter_window = gdk_window_lookup_for_display (display, filter_xwindow);
 870       if (filter_window && !GDK_IS_WINDOW (filter_window))
 871         filter_window = NULL;
 872     }
 873
 874   if (window)
 875     {
 876       screen = GDK_WINDOW_SCREEN (window);
 877       screen_x11 = GDK_SCREEN_X11 (screen);
 878       toplevel = _gdk_x11_window_get_toplevel (window);
 879     }
 880
 881   if (window != NULL)
 882     {
 883       window_impl = GDK_WINDOW_IMPL_X11 (window_private->impl);
 884
 885       /* Move key events on focus window to the real toplevel, and
 886        * filter out all other events on focus window
 887        */
 888       if (toplevel && xwindow == toplevel->focus_window)
 889         {
 890           switch (xevent->type)
 891             {
 892             case KeyPress:
 893             case KeyRelease:
 894               xwindow = GDK_WINDOW_XID (window);
 895               xevent->xany.window = xwindow;
 896               break;
 897             default:
 898               return FALSE;
 899             }
 900         }
 901
 902       g_object_ref (window);
 903     }
 904
 905   event->any.window = window;
 906   event->any.send_event = xevent->xany.send_event ? TRUE : FALSE;
 907
 908   if (window_private && GDK_WINDOW_DESTROYED (window))
 909     {
 910       if (xevent->type != DestroyNotify)
 911         {
 912           return_val = FALSE;
 913           goto done;
 914         }
 915     }
 916   else if (filter_window)
 917     {
 918       /* Apply per-window filters */
 919       GdkWindowObject *filter_private = (GdkWindowObject *) filter_window;
 920       GdkFilterReturn result;
 921
 922       if (filter_private->filters)
 923         {
 924           g_object_ref (filter_window);
 925
 926           result = gdk_event_apply_filters (xevent, event,
 927                                             filter_private->filters);
 928
 929           g_object_unref (filter_window);
 930
 931           if (result != GDK_FILTER_CONTINUE)
 932             {
 933               return_val = (result == GDK_FILTER_TRANSLATE) ? TRUE : FALSE;
 934               goto done;
 935             }
 936         }
 937     }
 938
 939   if (screen_x11 && screen_x11->wmspec_check_window != None &&
 940       xwindow == screen_x11->wmspec_check_window)
 941     {
 942       if (xevent->type == DestroyNotify)
 943         {
 944           screen_x11->wmspec_check_window = None;
 945           g_free (screen_x11->window_manager_name);
 946           screen_x11->window_manager_name = g_strdup ("unknown");
 947
 948           /* careful, reentrancy */
 949           _gdk_x11_screen_window_manager_changed (GDK_SCREEN (screen_x11));
 950         }
 951
 952       /* Eat events on this window unless someone had wrapped
 953        * it as a foreign window
 954        */
 955       if (window == NULL)
 956         {
 957           return_val = FALSE;
 958           goto done;
 959         }
 960     }
 961
 962   if (window &&
 963       (xevent->xany.type == MotionNotify ||
 964        xevent->xany.type == ButtonRelease))
 965     {
 966       if (_gdk_moveresize_handle_event (xevent))
 967         {
 968           return_val = FALSE;
 969           goto done;
 970         }
 971     }
 972
 973   /* We do a "manual" conversion of the XEvent to a
 974    *  GdkEvent. The structures are mostly the same so
 975    *  the conversion is fairly straightforward. We also
 976    *  optionally print debugging info regarding events
 977    *  received.
 978    */
 979
 980   return_val = TRUE;
 981
 982   if (window)
 983     {
 984       _gdk_windowing_window_get_offsets (window, &xoffset, &yoffset);
 985     }
 986   else
 987     {
 988       xoffset = 0;
 989       yoffset = 0;
 990     }
 991
 992   switch (xevent->type)
 993     {
 994     case KeyPress:
 995       if (window_private == NULL)
 996         {
 997           return_val = FALSE;
 998           break;
 999         }
1000       translate_key_event (display, event, xevent);
1001       break;
1002
1003     case KeyRelease:
1004       if (window_private == NULL)
1005         {
1006           return_val = FALSE;
1007           break;
1008         }
1009
1010       /* Emulate detectable auto-repeat by checking to see
1011        * if the next event is a key press with the same
1012        * keycode and timestamp, and if so, ignoring the event.
1013        */
1014
1015       if (!display_x11->have_xkb_autorepeat && XPending (xevent->xkey.display))
1016         {
1017           XEvent next_event;
1018
1019           XPeekEvent (xevent->xkey.display, &next_event);
1020
1021           if (next_event.type == KeyPress &&
1022               next_event.xkey.keycode == xevent->xkey.keycode &&
1023               next_event.xkey.time == xevent->xkey.time)
1024             {
1025               return_val = FALSE;
1026               break;
1027             }
1028         }
1029
1030       translate_key_event (display, event, xevent);
1031       break;
1032
1033     case ButtonPress:
1034       GDK_NOTE (EVENTS,
1035                 g_message ("button press:\t\twindow: %ld  x,y: %d %d  button: %d",
1036                            xevent->xbutton.window,
1037                            xevent->xbutton.x, xevent->xbutton.y,
1038                            xevent->xbutton.button));
1039
1040       if (window_private == NULL ||
1041           ((window_private->extension_events != 0) &&
1042            display_x11->input_ignore_core))
1043         {
1044           return_val = FALSE;
1045           break;
1046         }
1047
1048       /* If we get a ButtonPress event where the button is 4 or 5,
1049          it's a Scroll event */
1050       switch (xevent->xbutton.button)
1051         {
1052         case 4: /* up */
1053         case 5: /* down */
1054         case 6: /* left */
1055         case 7: /* right */
1056           event->scroll.type = GDK_SCROLL;
1057
1058           if (xevent->xbutton.button == 4)
1059             event->scroll.direction = GDK_SCROLL_UP;
1060           else if (xevent->xbutton.button == 5)
1061             event->scroll.direction = GDK_SCROLL_DOWN;
1062           else if (xevent->xbutton.button == 6)
1063             event->scroll.direction = GDK_SCROLL_LEFT;
1064           else
1065             event->scroll.direction = GDK_SCROLL_RIGHT;
1066
1067           event->scroll.window = window;
1068           event->scroll.time = xevent->xbutton.time;
1069           event->scroll.x = xevent->xbutton.x + xoffset;
1070           event->scroll.y = xevent->xbutton.y + yoffset;
1071           event->scroll.x_root = (gfloat)xevent->xbutton.x_root;
1072           event->scroll.y_root = (gfloat)xevent->xbutton.y_root;
1073           event->scroll.state = (GdkModifierType) xevent->xbutton.state;
1074           event->scroll.device = display->core_pointer;
1075
1076           set_screen_from_root (display, event, xevent->xbutton.root);
1077
1078           break;
1079
1080         default:
1081           event->button.type = GDK_BUTTON_PRESS;
1082           event->button.window = window;
1083           event->button.time = xevent->xbutton.time;
1084           event->button.x = xevent->xbutton.x + xoffset;
1085           event->button.y = xevent->xbutton.y + yoffset;
1086           event->button.x_root = (gfloat)xevent->xbutton.x_root;
1087           event->button.y_root = (gfloat)xevent->xbutton.y_root;
1088           event->button.axes = NULL;
1089           event->button.state = (GdkModifierType) xevent->xbutton.state;
1090           event->button.button = xevent->xbutton.button;
1091           event->button.device = display->core_pointer;
1092
1093           set_screen_from_root (display, event, xevent->xbutton.root);
1094
1095           _gdk_event_button_generate (display, event);
1096           break;
1097         }
1098
1099       break;
1100
1101     case ButtonRelease:
1102       GDK_NOTE (EVENTS,
1103                 g_message ("button release:\twindow: %ld  x,y: %d %d  button: %d",
1104                            xevent->xbutton.window,
1105                            xevent->xbutton.x, xevent->xbutton.y,
1106                            xevent->xbutton.button));
1107
1108       if (window_private == NULL ||
1109           ((window_private->extension_events != 0) &&
1110            display_x11->input_ignore_core))
1111         {
1112           return_val = FALSE;
1113           break;
1114         }
1115
1116       /* We treat button presses as scroll wheel events, so ignore the release */
1117       if (xevent->xbutton.button == 4 || xevent->xbutton.button == 5 ||
1118           xevent->xbutton.button == 6 || xevent->xbutton.button ==7)
1119         {
1120           return_val = FALSE;
1121           break;
1122         }
1123
1124       event->button.type = GDK_BUTTON_RELEASE;
1125       event->button.window = window;
1126       event->button.time = xevent->xbutton.time;
1127       event->button.x = xevent->xbutton.x + xoffset;
1128       event->button.y = xevent->xbutton.y + yoffset;
1129       event->button.x_root = (gfloat)xevent->xbutton.x_root;
1130       event->button.y_root = (gfloat)xevent->xbutton.y_root;
1131       event->button.axes = NULL;
1132       event->button.state = (GdkModifierType) xevent->xbutton.state;
1133       event->button.button = xevent->xbutton.button;
1134       event->button.device = display->core_pointer;
1135
1136       set_screen_from_root (display, event, xevent->xbutton.root);
1137
1138       break;
1139
1140     case MotionNotify:
1141       GDK_NOTE (EVENTS,
1142                 g_message ("motion notify:\t\twindow: %ld  x,y: %d %d  hint: %s",
1143                            xevent->xmotion.window,
1144                            xevent->xmotion.x, xevent->xmotion.y,
1145                            (xevent->xmotion.is_hint) ? "true" : "false"));
1146
1147       if (window_private == NULL ||
1148           ((window_private->extension_events != 0) &&
1149            display_x11->input_ignore_core))
1150         {
1151           return_val = FALSE;
1152           break;
1153         }
1154
1155       event->motion.type = GDK_MOTION_NOTIFY;
1156       event->motion.window = window;
1157       event->motion.time = xevent->xmotion.time;
1158       event->motion.x = xevent->xmotion.x + xoffset;
1159       event->motion.y = xevent->xmotion.y + yoffset;
1160       event->motion.x_root = (gfloat)xevent->xmotion.x_root;
1161       event->motion.y_root = (gfloat)xevent->xmotion.y_root;
1162       event->motion.axes = NULL;
1163       event->motion.state = (GdkModifierType) xevent->xmotion.state;
1164       event->motion.is_hint = xevent->xmotion.is_hint;
1165       event->motion.device = display->core_pointer;
1166
1167       set_screen_from_root (display, event, xevent->xmotion.root);
1168
1169       break;
1170
1171     case EnterNotify:
1172       GDK_NOTE (EVENTS,
1173                 g_message ("enter notify:\t\twindow: %ld  detail: %d subwin: %ld",
1174                            xevent->xcrossing.window,
1175                            xevent->xcrossing.detail,
1176                            xevent->xcrossing.subwindow));
1177
1178       if (window_private == NULL)
1179         {
1180           return_val = FALSE;
1181           break;
1182         }
1183
1184       /* Handle focusing (in the case where no window manager is running */
1185       if (toplevel &&
1186           xevent->xcrossing.detail != NotifyInferior &&
1187           xevent->xcrossing.focus && !toplevel->has_focus_window)
1188         {
1189           gboolean had_focus = HAS_FOCUS (toplevel);
1190
1191           toplevel->has_pointer_focus = TRUE;
1192
1193           if (HAS_FOCUS (toplevel) != had_focus)
1194             generate_focus_event (window, TRUE);
1195         }
1196
1197       /* Tell XInput stuff about it if appropriate */
1198       if (window_private &&
1199           !GDK_WINDOW_DESTROYED (window) &&
1200           window_private->extension_events != 0)
1201         _gdk_input_enter_event (&xevent->xcrossing, window);
1202
1203       event->crossing.type = GDK_ENTER_NOTIFY;
1204       event->crossing.window = window;
1205
1206       /* If the subwindow field of the XEvent is non-NULL, then
1207        *  lookup the corresponding GdkWindow.
1208        */
1209       if (xevent->xcrossing.subwindow != None)
1210         event->crossing.subwindow = gdk_window_lookup_for_display (display, xevent->xcrossing.subwindow);
1211       else
1212         event->crossing.subwindow = NULL;
1213
1214       event->crossing.time = xevent->xcrossing.time;
1215       event->crossing.x = xevent->xcrossing.x + xoffset;
1216       event->crossing.y = xevent->xcrossing.y + yoffset;
1217       event->crossing.x_root = xevent->xcrossing.x_root;
1218       event->crossing.y_root = xevent->xcrossing.y_root;
1219
1220       set_screen_from_root (display, event, xevent->xcrossing.root);
1221
1222       /* Translate the crossing mode into Gdk terms.
1223        */
1224       switch (xevent->xcrossing.mode)
1225         {
1226         case NotifyNormal:
1227           event->crossing.mode = GDK_CROSSING_NORMAL;
1228           break;
1229         case NotifyGrab:
1230           event->crossing.mode = GDK_CROSSING_GRAB;
1231           break;
1232         case NotifyUngrab:
1233           event->crossing.mode = GDK_CROSSING_UNGRAB;
1234           break;
1235         };
1236
1237       /* Translate the crossing detail into Gdk terms.
1238        */
1239       switch (xevent->xcrossing.detail)
1240         {
1241         case NotifyInferior:
1242           event->crossing.detail = GDK_NOTIFY_INFERIOR;
1243           break;
1244         case NotifyAncestor:
1245           event->crossing.detail = GDK_NOTIFY_ANCESTOR;
1246           break;
1247         case NotifyVirtual:
1248           event->crossing.detail = GDK_NOTIFY_VIRTUAL;
1249           break;
1250         case NotifyNonlinear:
1251           event->crossing.detail = GDK_NOTIFY_NONLINEAR;
1252           break;
1253         case NotifyNonlinearVirtual:
1254           event->crossing.detail = GDK_NOTIFY_NONLINEAR_VIRTUAL;
1255           break;
1256         default:
1257           event->crossing.detail = GDK_NOTIFY_UNKNOWN;
1258           break;
1259         }
1260
1261       event->crossing.focus = xevent->xcrossing.focus;
1262       event->crossing.state = xevent->xcrossing.state;
1263
1264       break;
1265
1266     case LeaveNotify:
1267       GDK_NOTE (EVENTS,
1268                 g_message ("leave notify:\t\twindow: %ld  detail: %d subwin: %ld",
1269                            xevent->xcrossing.window,
1270                            xevent->xcrossing.detail, xevent->xcrossing.subwindow));
1271
1272       if (window_private == NULL)
1273         {
1274           return_val = FALSE;
1275           break;
1276         }
1277
1278       /* Handle focusing (in the case where no window manager is running */
1279       if (toplevel &&
1280           xevent->xcrossing.detail != NotifyInferior &&
1281           xevent->xcrossing.focus && !toplevel->has_focus_window)
1282         {
1283           gboolean had_focus = HAS_FOCUS (toplevel);
1284
1285           toplevel->has_pointer_focus = FALSE;
1286
1287           if (HAS_FOCUS (toplevel) != had_focus)
1288             generate_focus_event (window, FALSE);
1289         }
1290
1291       event->crossing.type = GDK_LEAVE_NOTIFY;
1292       event->crossing.window = window;
1293
1294       /* If the subwindow field of the XEvent is non-NULL, then
1295        *  lookup the corresponding GdkWindow.
1296        */
1297       if (xevent->xcrossing.subwindow != None)
1298         event->crossing.subwindow = gdk_window_lookup_for_display (display, xevent->xcrossing.subwindow);
1299       else
1300         event->crossing.subwindow = NULL;
1301
1302       event->crossing.time = xevent->xcrossing.time;
1303       event->crossing.x = xevent->xcrossing.x + xoffset;
1304       event->crossing.y = xevent->xcrossing.y + yoffset;
1305       event->crossing.x_root = xevent->xcrossing.x_root;
1306       event->crossing.y_root = xevent->xcrossing.y_root;
1307
1308       set_screen_from_root (display, event, xevent->xcrossing.root);
1309
1310       /* Translate the crossing mode into Gdk terms.
1311        */
1312       switch (xevent->xcrossing.mode)
1313         {
1314         case NotifyNormal:
1315           event->crossing.mode = GDK_CROSSING_NORMAL;
1316           break;
1317         case NotifyGrab:
1318           event->crossing.mode = GDK_CROSSING_GRAB;
1319           break;
1320         case NotifyUngrab:
1321           event->crossing.mode = GDK_CROSSING_UNGRAB;
1322           break;
1323         };
1324
1325       /* Translate the crossing detail into Gdk terms.
1326        */
1327       switch (xevent->xcrossing.detail)
1328         {
1329         case NotifyInferior:
1330           event->crossing.detail = GDK_NOTIFY_INFERIOR;
1331           break;
1332         case NotifyAncestor:
1333           event->crossing.detail = GDK_NOTIFY_ANCESTOR;
1334           break;
1335         case NotifyVirtual:
1336           event->crossing.detail = GDK_NOTIFY_VIRTUAL;
1337           break;
1338         case NotifyNonlinear:
1339           event->crossing.detail = GDK_NOTIFY_NONLINEAR;
1340           break;
1341         case NotifyNonlinearVirtual:
1342           event->crossing.detail = GDK_NOTIFY_NONLINEAR_VIRTUAL;
1343           break;
1344         default:
1345           event->crossing.detail = GDK_NOTIFY_UNKNOWN;
1346           break;
1347         }
1348
1349       event->crossing.focus = xevent->xcrossing.focus;
1350       event->crossing.state = xevent->xcrossing.state;
1351
1352       break;
1353
1354       /* We only care about focus events that indicate that _this_
1355        * window (not a ancestor or child) got or lost the focus
1356        */
1357     case FocusIn:
1358       GDK_NOTE (EVENTS,
1359                 g_message ("focus in:\t\twindow: %ld, detail: %s, mode: %s",
1360                            xevent->xfocus.window,
1361                            notify_details[xevent->xfocus.detail],
1362                            notify_modes[xevent->xfocus.mode]));
1363
1364       if (toplevel)
1365         {
1366           gboolean had_focus = HAS_FOCUS (toplevel);
1367
1368           switch (xevent->xfocus.detail)
1369             {
1370             case NotifyAncestor:
1371             case NotifyNonlinear:
1372             case NotifyVirtual:
1373             case NotifyNonlinearVirtual:
1374               toplevel->has_focus_window = TRUE;
1375               /* We pretend that the focus moves to the grab
1376                * window, so we pay attention to NotifyGrab
1377                * NotifyUngrab, and ignore NotifyWhileGrabbed
1378                */
1379               if (xevent->xfocus.mode != NotifyWhileGrabbed)
1380                 toplevel->has_focus = TRUE;
1381               break;
1382             case NotifyPointer:
1383               /* The X server sends NotifyPointer/NotifyGrab,
1384                * but the pointer focus is ignored while a
1385                * grab is in effect
1386                */
1387               if (xevent->xfocus.mode != NotifyGrab)
1388                 toplevel->has_pointer_focus = TRUE;
1389               break;
1390             case NotifyInferior:
1391             case NotifyPointerRoot:
1392             case NotifyDetailNone:
1393               break;
1394             }
1395
1396           if (HAS_FOCUS (toplevel) != had_focus)
1397             generate_focus_event (window, TRUE);
1398         }
1399       break;
1400     case FocusOut:
1401       GDK_NOTE (EVENTS,
1402                 g_message ("focus out:\t\twindow: %ld, detail: %s, mode: %s",
1403                            xevent->xfocus.window,
1404                            notify_details[xevent->xfocus.detail],
1405                            notify_modes[xevent->xfocus.mode]));
1406
1407       if (toplevel)
1408         {
1409           gboolean had_focus = HAS_FOCUS (toplevel);
1410
1411           switch (xevent->xfocus.detail)
1412             {
1413             case NotifyAncestor:
1414             case NotifyNonlinear:
1415             case NotifyVirtual:
1416             case NotifyNonlinearVirtual:
1417               toplevel->has_focus_window = FALSE;
1418               if (xevent->xfocus.mode != NotifyWhileGrabbed)
1419                 toplevel->has_focus = FALSE;
1420               break;
1421             case NotifyPointer:
1422               if (xevent->xfocus.mode != NotifyUngrab)
1423                 toplevel->has_pointer_focus = FALSE;
1424             break;
1425             case NotifyInferior:
1426             case NotifyPointerRoot:
1427             case NotifyDetailNone:
1428               break;
1429             }
1430
1431           if (HAS_FOCUS (toplevel) != had_focus)
1432             generate_focus_event (window, FALSE);
1433         }
1434       break;
1435
1436 #if 0
1437           /* gdk_keyboard_grab() causes following events. These events confuse
1438            * the XIM focus, so ignore them.
1439            */
1440           if (xevent->xfocus.mode == NotifyGrab ||
1441               xevent->xfocus.mode == NotifyUngrab)
1442             break;
1443 #endif
1444
1445     case KeymapNotify:
1446       GDK_NOTE (EVENTS,
1447                 g_message ("keymap notify"));
1448
1449       /* Not currently handled */
1450       return_val = FALSE;
1451       break;
1452
1453     case Expose:
1454       GDK_NOTE (EVENTS,
1455                 g_message ("expose:\t\twindow: %ld  %d  x,y: %d %d  w,h: %d %d%s",
1456                            xevent->xexpose.window, xevent->xexpose.count,
1457                            xevent->xexpose.x, xevent->xexpose.y,
1458                            xevent->xexpose.width, xevent->xexpose.height,
1459                            event->any.send_event ? " (send)" : ""));
1460
1461       if (window_private == NULL)
1462         {
1463           return_val = FALSE;
1464           break;
1465         }
1466
1467       {
1468         GdkRectangle expose_rect;
1469
1470         expose_rect.x = xevent->xexpose.x + xoffset;
1471         expose_rect.y = xevent->xexpose.y + yoffset;
1472         expose_rect.width = xevent->xexpose.width;
1473         expose_rect.height = xevent->xexpose.height;
1474
1475         if (return_exposes)
1476           {
1477             event->expose.type = GDK_EXPOSE;
1478             event->expose.area = expose_rect;
1479             event->expose.region = gdk_region_rectangle (&expose_rect);
1480             event->expose.window = window;
1481             event->expose.count = xevent->xexpose.count;
1482
1483             return_val = TRUE;
1484           }
1485         else
1486           {
1487             _gdk_window_process_expose (window, xevent->xexpose.serial, &expose_rect);
1488             return_val = FALSE;
1489           }
1490
1491         return_val = FALSE;
1492       }
1493
1494       break;
1495
1496     case GraphicsExpose:
1497       {
1498         GdkRectangle expose_rect;
1499
1500         GDK_NOTE (EVENTS,
1501                   g_message ("graphics expose:\tdrawable: %ld",
1502                              xevent->xgraphicsexpose.drawable));
1503
1504         if (window_private == NULL)
1505           {
1506             return_val = FALSE;
1507             break;
1508           }
1509
1510         expose_rect.x = xevent->xgraphicsexpose.x + xoffset;
1511         expose_rect.y = xevent->xgraphicsexpose.y + yoffset;
1512         expose_rect.width = xevent->xgraphicsexpose.width;
1513         expose_rect.height = xevent->xgraphicsexpose.height;
1514
1515         if (return_exposes)
1516           {
1517             event->expose.type = GDK_EXPOSE;
1518             event->expose.area = expose_rect;
1519             event->expose.region = gdk_region_rectangle (&expose_rect);
1520             event->expose.window = window;
1521             event->expose.count = xevent->xgraphicsexpose.count;
1522
1523             return_val = TRUE;
1524           }
1525         else
1526           {
1527             _gdk_window_process_expose (window, xevent->xgraphicsexpose.serial, &expose_rect);
1528
1529             return_val = FALSE;
1530           }
1531
1532       }
1533       break;
1534
1535     case NoExpose:
1536       GDK_NOTE (EVENTS,
1537                 g_message ("no expose:\t\tdrawable: %ld",
1538                            xevent->xnoexpose.drawable));
1539
1540       event->no_expose.type = GDK_NO_EXPOSE;
1541       event->no_expose.window = window;
1542
1543       break;
1544
1545     case VisibilityNotify:
1546 #ifdef G_ENABLE_DEBUG
1547       if (_gdk_debug_flags & GDK_DEBUG_EVENTS)
1548         switch (xevent->xvisibility.state)
1549           {
1550           case VisibilityFullyObscured:
1551             g_message ("visibility notify:\twindow: %ld  none",
1552                        xevent->xvisibility.window);
1553             break;
1554           case VisibilityPartiallyObscured:
1555             g_message ("visibility notify:\twindow: %ld  partial",
1556                        xevent->xvisibility.window);
1557             break;
1558           case VisibilityUnobscured:
1559             g_message ("visibility notify:\twindow: %ld  full",
1560                        xevent->xvisibility.window);
1561             break;
1562           }
1563 #endif /* G_ENABLE_DEBUG */
1564
1565       if (window_private == NULL)
1566         {
1567           return_val = FALSE;
1568           break;
1569         }
1570
1571       event->visibility.type = GDK_VISIBILITY_NOTIFY;
1572       event->visibility.window = window;
1573
1574       switch (xevent->xvisibility.state)
1575         {
1576         case VisibilityFullyObscured:
1577           event->visibility.state = GDK_VISIBILITY_FULLY_OBSCURED;
1578           break;
1579
1580         case VisibilityPartiallyObscured:
1581           event->visibility.state = GDK_VISIBILITY_PARTIAL;
1582           break;
1583
1584         case VisibilityUnobscured:
1585           event->visibility.state = GDK_VISIBILITY_UNOBSCURED;
1586           break;
1587         }
1588
1589       break;
1590
1591     case CreateNotify:
1592       GDK_NOTE (EVENTS,
1593                 g_message ("create notify:\twindow: %ld  x,y: %d %d     w,h: %d %d  b-w: %d  parent: %ld         ovr: %d",
1594                            xevent->xcreatewindow.window,
1595                            xevent->xcreatewindow.x,
1596                            xevent->xcreatewindow.y,
1597                            xevent->xcreatewindow.width,
1598                            xevent->xcreatewindow.height,
1599                            xevent->xcreatewindow.border_width,
1600                            xevent->xcreatewindow.parent,
1601                            xevent->xcreatewindow.override_redirect));
1602       /* not really handled */
1603       break;
1604
1605     case DestroyNotify:
1606       GDK_NOTE (EVENTS,
1607                 g_message ("destroy notify:\twindow: %ld",
1608                            xevent->xdestroywindow.window));
1609
1610       /* Ignore DestroyNotify from SubstructureNotifyMask */
1611       if (xevent->xdestroywindow.window == xevent->xdestroywindow.event)
1612         {
1613           event->any.type = GDK_DESTROY;
1614           event->any.window = window;
1615
1616           return_val = window_private && !GDK_WINDOW_DESTROYED (window);
1617
1618           if (window && GDK_WINDOW_XID (window) != screen_x11->xroot_window)
1619             gdk_window_destroy_notify (window);
1620         }
1621       else
1622         return_val = FALSE;
1623
1624       break;
1625
1626     case UnmapNotify:
1627       GDK_NOTE (EVENTS,
1628                 g_message ("unmap notify:\t\twindow: %ld",
1629                            xevent->xmap.window));
1630
1631       event->any.type = GDK_UNMAP;
1632       event->any.window = window;
1633
1634       /* If we are shown (not withdrawn) and get an unmap, it means we
1635        * were iconified in the X sense. If we are withdrawn, and get
1636        * an unmap, it means we hid the window ourselves, so we
1637        * will have already flipped the iconified bit off.
1638        */
1639       if (window)
1640         {
1641           if (GDK_WINDOW_IS_MAPPED (window))
1642             gdk_synthesize_window_state (window,
1643                                          0,
1644                                          GDK_WINDOW_STATE_ICONIFIED);
1645
1646           _gdk_xgrab_check_unmap (window, xevent->xany.serial);
1647         }
1648
1649       break;
1650
1651     case MapNotify:
1652       GDK_NOTE (EVENTS,
1653                 g_message ("map notify:\t\twindow: %ld",
1654                            xevent->xmap.window));
1655
1656       event->any.type = GDK_MAP;
1657       event->any.window = window;
1658
1659       /* Unset iconified if it was set */
1660       if (window && (((GdkWindowObject*)window)->state & GDK_WINDOW_STATE_ICONIFIED))
1661         gdk_synthesize_window_state (window,
1662                                      GDK_WINDOW_STATE_ICONIFIED,
1663                                      0);
1664
1665       break;
1666
1667     case ReparentNotify:
1668       GDK_NOTE (EVENTS,
1669                 g_message ("reparent notify:\twindow: %ld  x,y: %d %d  parent: %ld      ovr: %d",
1670                            xevent->xreparent.window,
1671                            xevent->xreparent.x,
1672                            xevent->xreparent.y,
1673                            xevent->xreparent.parent,
1674                            xevent->xreparent.override_redirect));
1675
1676       /* Not currently handled */
1677       return_val = FALSE;
1678       break;
1679
1680     case ConfigureNotify:
1681       GDK_NOTE (EVENTS,
1682                 g_message ("configure notify:\twindow: %ld  x,y: %d %d  w,h: %d %d  b-w: %d  above: %ld  ovr: %d%s",
1683                            xevent->xconfigure.window,
1684                            xevent->xconfigure.x,
1685                            xevent->xconfigure.y,
1686                            xevent->xconfigure.width,
1687                            xevent->xconfigure.height,
1688                            xevent->xconfigure.border_width,
1689                            xevent->xconfigure.above,
1690                            xevent->xconfigure.override_redirect,
1691                            !window
1692                            ? " (discarding)"
1693                            : GDK_WINDOW_TYPE (window) == GDK_WINDOW_CHILD
1694                            ? " (discarding child)"
1695                            : xevent->xconfigure.event != xevent->xconfigure.window
1696                            ? " (discarding substructure)"
1697                            : ""));
1698       if (window && GDK_WINDOW_TYPE (window) == GDK_WINDOW_ROOT)
1699         _gdk_x11_screen_size_changed (screen, xevent);
1700
1701       if (window &&
1702           xevent->xconfigure.event == xevent->xconfigure.window &&
1703           !GDK_WINDOW_DESTROYED (window) &&
1704           (window_private->extension_events != 0))
1705         _gdk_input_configure_event (&xevent->xconfigure, window);
1706
1707       if (!window ||
1708           xevent->xconfigure.event != xevent->xconfigure.window ||
1709           GDK_WINDOW_TYPE (window) == GDK_WINDOW_CHILD ||
1710           GDK_WINDOW_TYPE (window) == GDK_WINDOW_ROOT)
1711         return_val = FALSE;
1712       else
1713         {
1714           event->configure.type = GDK_CONFIGURE;
1715           event->configure.window = window;
1716           event->configure.width = xevent->xconfigure.width;
1717           event->configure.height = xevent->xconfigure.height;
1718
1719           if (!xevent->xconfigure.send_event &&
1720               !xevent->xconfigure.override_redirect &&
1721               !GDK_WINDOW_DESTROYED (window))
1722             {
1723               gint tx = 0;
1724               gint ty = 0;
1725               Window child_window = 0;
1726
1727               gdk_error_trap_push ();
1728               if (XTranslateCoordinates (GDK_DRAWABLE_XDISPLAY (window),
1729                                          GDK_DRAWABLE_XID (window),
1730                                          screen_x11->xroot_window,
1731                                          0, 0,
1732                                          &tx, &ty,
1733                                          &child_window))
1734                 {
1735                   event->configure.x = tx;
1736                   event->configure.y = ty;
1737                 }
1738               gdk_error_trap_pop ();
1739             }
1740           else
1741             {
1742               event->configure.x = xevent->xconfigure.x;
1743               event->configure.y = xevent->xconfigure.y;
1744             }
1745           window_private->x = event->configure.x;
1746           window_private->y = event->configure.y;
1747           window_impl->width = xevent->xconfigure.width;
1748           window_impl->height = xevent->xconfigure.height;
1749           if (window_private->resize_count >= 1)
1750             {
1751               window_private->resize_count -= 1;
1752
1753               if (window_private->resize_count == 0)
1754                 _gdk_moveresize_configure_done (display, window);
1755             }
1756         }
1757       break;
1758
1759     case PropertyNotify:
1760       GDK_NOTE (EVENTS,
1761                 g_message ("property notify:\twindow: %ld, atom(%ld): %s%s%s",
1762                            xevent->xproperty.window,
1763                            xevent->xproperty.atom,
1764                            "\"",
1765                            gdk_x11_get_xatom_name_for_display (display, xevent->xproperty.atom),
1766                            "\""));
1767
1768       if (window_private == NULL)
1769         {
1770           return_val = FALSE;
1771           break;
1772         }
1773
1774       /* We compare with the serial of the last time we mapped the
1775        * window to avoid refetching properties that we set ourselves
1776        */
1777       if (toplevel &&
1778           xevent->xproperty.serial >= toplevel->map_serial)
1779         {
1780           if (xevent->xproperty.atom == gdk_x11_get_xatom_by_name_for_display (display, "_NET_WM_STATE"))
1781             gdk_check_wm_state_changed (window);
1782
1783           if (xevent->xproperty.atom == gdk_x11_get_xatom_by_name_for_display (display, "_NET_WM_DESKTOP"))
1784             gdk_check_wm_desktop_changed (window);
1785         }
1786
1787       if (window_private->event_mask & GDK_PROPERTY_CHANGE_MASK)
1788         {
1789           event->property.type = GDK_PROPERTY_NOTIFY;
1790           event->property.window = window;
1791           event->property.atom = gdk_x11_xatom_to_atom_for_display (display, xevent->xproperty.atom);
1792           event->property.time = xevent->xproperty.time;
1793           event->property.state = xevent->xproperty.state;
1794         }
1795       else
1796         return_val = FALSE;
1797
1798       break;
1799
1800     case SelectionClear:
1801       GDK_NOTE (EVENTS,
1802                 g_message ("selection clear:\twindow: %ld",
1803                            xevent->xproperty.window));
1804
1805       if (_gdk_selection_filter_clear_event (&xevent->xselectionclear))
1806         {
1807           event->selection.type = GDK_SELECTION_CLEAR;
1808           event->selection.window = window;
1809           event->selection.selection = gdk_x11_xatom_to_atom_for_display (display, xevent->xselectionclear.selection);
1810           event->selection.time = xevent->xselectionclear.time;
1811         }
1812       else
1813         return_val = FALSE;
1814
1815       break;
1816
1817     case SelectionRequest:
1818       GDK_NOTE (EVENTS,
1819                 g_message ("selection request:\twindow: %ld",
1820                            xevent->xproperty.window));
1821
1822       event->selection.type = GDK_SELECTION_REQUEST;
1823       event->selection.window = window;
1824       event->selection.selection = gdk_x11_xatom_to_atom_for_display (display, xevent->xselectionrequest.selection);
1825       event->selection.target = gdk_x11_xatom_to_atom_for_display (display, xevent->xselectionrequest.target);
1826       event->selection.property = gdk_x11_xatom_to_atom_for_display (display, xevent->xselectionrequest.property);
1827       event->selection.requestor = xevent->xselectionrequest.requestor;
1828       event->selection.time = xevent->xselectionrequest.time;
1829
1830       break;
1831
1832     case SelectionNotify:
1833       GDK_NOTE (EVENTS,
1834                 g_message ("selection notify:\twindow: %ld",
1835                            xevent->xproperty.window));
1836
1837
1838       event->selection.type = GDK_SELECTION_NOTIFY;
1839       event->selection.window = window;
1840       event->selection.selection = gdk_x11_xatom_to_atom_for_display (display, xevent->xselection.selection);
1841       event->selection.target = gdk_x11_xatom_to_atom_for_display (display, xevent->xselection.target);
1842       event->selection.property = gdk_x11_xatom_to_atom_for_display (display, xevent->xselection.property);
1843       event->selection.time = xevent->xselection.time;
1844
1845       break;
1846
1847     case ColormapNotify:
1848       GDK_NOTE (EVENTS,
1849                 g_message ("colormap notify:\twindow: %ld",
1850                            xevent->xcolormap.window));
1851
1852       /* Not currently handled */
1853       return_val = FALSE;
1854       break;
1855
1856     case ClientMessage:
1857       {
1858         GList *tmp_list;
1859         GdkFilterReturn result = GDK_FILTER_CONTINUE;
1860         GdkAtom message_type = gdk_x11_xatom_to_atom_for_display (display, xevent->xclient.message_type);
1861
1862         GDK_NOTE (EVENTS,
1863                   g_message ("client message:\twindow: %ld",
1864                              xevent->xclient.window));
1865
1866         tmp_list = display_x11->client_filters;
1867         while (tmp_list)
1868           {
1869             GdkClientFilter *filter = tmp_list->data;
1870             if (filter->type == message_type)
1871               {
1872                 result = (*filter->function) (xevent, event, filter->data);
1873                 break;
1874               }
1875
1876             tmp_list = tmp_list->next;
1877           }
1878
1879         switch (result)
1880           {
1881           case GDK_FILTER_REMOVE:
1882             return_val = FALSE;
1883             break;
1884           case GDK_FILTER_TRANSLATE:
1885             return_val = TRUE;
1886             break;
1887           case GDK_FILTER_CONTINUE:
1888             /* Send unknown ClientMessage's on to Gtk for it to use */
1889             if (window_private == NULL)
1890               {
1891                 return_val = FALSE;
1892               }
1893             else
1894               {
1895                 event->client.type = GDK_CLIENT_EVENT;
1896                 event->client.window = window;
1897                 event->client.message_type = message_type;
1898                 event->client.data_format = xevent->xclient.format;
1899                 memcpy(&event->client.data, &xevent->xclient.data,
1900                        sizeof(event->client.data));
1901               }
1902             break;
1903           }
1904       }
1905
1906       break;
1907
1908     case MappingNotify:
1909       GDK_NOTE (EVENTS,
1910                 g_message ("mapping notify"));
1911
1912       /* Let XLib know that there is a new keyboard mapping.
1913        */
1914       XRefreshKeyboardMapping (&xevent->xmapping);
1915       _gdk_keymap_keys_changed (display);
1916       return_val = FALSE;
1917       break;
1918
1919     default:
1920 #ifdef HAVE_XKB
1921       if (xevent->type == display_x11->xkb_event_type)
1922         {
1923           XkbEvent *xkb_event = (XkbEvent *)xevent;
1924
1925           switch (xkb_event->any.xkb_type)
1926             {
1927             case XkbNewKeyboardNotify:
1928             case XkbMapNotify:
1929               _gdk_keymap_keys_changed (display);
1930
1931               return_val = FALSE;
1932               break;
1933
1934             case XkbStateNotify:
1935               _gdk_keymap_state_changed (display);
1936               break;
1937             }
1938         }
1939       else
1940 #endif
1941         {
1942           /* something else - (e.g., a Xinput event) */
1943
1944           if (window_private &&
1945               !GDK_WINDOW_DESTROYED (window_private) &&
1946               (window_private->extension_events != 0))
1947             return_val = _gdk_input_other_event(event, xevent, window);
1948           else
1949             return_val = FALSE;
1950
1951           break;
1952         }
1953     }
1954
1955  done:
1956   if (return_val)
1957     {
1958       if (event->any.window)
1959         g_object_ref (event->any.window);
1960       if (((event->any.type == GDK_ENTER_NOTIFY) ||
1961            (event->any.type == GDK_LEAVE_NOTIFY)) &&
1962           (event->crossing.subwindow != NULL))
1963         g_object_ref (event->crossing.subwindow);
1964     }
1965   else
1966     {
1967       /* Mark this event as having no resources to be freed */
1968       event->any.window = NULL;
1969       event->any.type = GDK_NOTHING;
1970     }
1971
1972   if (window)
1973     g_object_unref (window);
1974
1975   return return_val;
1976 }
1977
1978 static GdkFilterReturn
1979 gdk_wm_protocols_filter (GdkXEvent *xev,
1980                          GdkEvent  *event,
1981                          gpointer data)
1982 {
1983   XEvent *xevent = (XEvent *)xev;
1984   GdkWindow *win = event->any.window;
1985   GdkDisplay *display = GDK_WINDOW_DISPLAY (win);
1986
1987   if ((Atom) xevent->xclient.data.l[0] == gdk_x11_get_xatom_by_name_for_display (display, "WM_DELETE_WINDOW"))
1988     {
1989   /* The delete window request specifies a window
1990    *  to delete. We don't actually destroy the
1991    *  window because "it is only a request". (The
1992    *  window might contain vital data that the
1993    *  program does not want destroyed). Instead
1994    *  the event is passed along to the program,
1995    *  which should then destroy the window.
1996    */
1997       GDK_NOTE (EVENTS,
1998                 g_message ("delete window:\t\twindow: %ld",
1999                            xevent->xclient.window));
2000
2001       event->any.type = GDK_DELETE;
2002
2003       return GDK_FILTER_TRANSLATE;
2004     }
2005   else if ((Atom) xevent->xclient.data.l[0] == gdk_x11_get_xatom_by_name_for_display (display, "WM_TAKE_FOCUS"))
2006     {
2007       GdkToplevelX11 *toplevel = _gdk_x11_window_get_toplevel (event->any.window);
2008       GdkWindowObject *private = (GdkWindowObject *)win;
2009
2010       /* There is no way of knowing reliably whether we are viewable;
2011        * _gdk_x11_set_input_focus_safe() traps errors asynchronously.
2012        */
2013       if (toplevel && private->accept_focus)
2014         _gdk_x11_set_input_focus_safe (display, toplevel->focus_window,
2015                                        RevertToParent,
2016                                        xevent->xclient.data.l[1]);
2017     }
2018   else if ((Atom) xevent->xclient.data.l[0] == gdk_x11_get_xatom_by_name_for_display (display, "_NET_WM_PING") &&
2019            !_gdk_x11_display_is_root_window (display,
2020                                              xevent->xclient.window))
2021     {
2022       XEvent xev = *xevent;
2023
2024       xev.xclient.window = GDK_WINDOW_XROOTWIN (win);
2025       XSendEvent (GDK_WINDOW_XDISPLAY (win),
2026                   xev.xclient.window,
2027                   False,
2028                   SubstructureRedirectMask | SubstructureNotifyMask, &xev);
2029     }
2030
2031   return GDK_FILTER_REMOVE;
2032 }
2033
2034 void
2035 _gdk_events_queue (GdkDisplay *display)
2036 {
2037   GList *node;
2038   GdkEvent *event;
2039   XEvent xevent;
2040   Display *xdisplay = GDK_DISPLAY_XDISPLAY (display);
2041
2042   while (!_gdk_event_queue_find_first(display) && XPending (xdisplay))
2043     {
2044       XNextEvent (xdisplay, &xevent);
2045
2046       switch (xevent.type)
2047         {
2048         case KeyPress:
2049         case KeyRelease:
2050           break;
2051         default:
2052           if (XFilterEvent (&xevent, None))
2053             continue;
2054         }
2055
2056       event = gdk_event_new (GDK_NOTHING);
2057
2058       event->any.window = NULL;
2059       event->any.send_event = xevent.xany.send_event ? TRUE : FALSE;
2060
2061       ((GdkEventPrivate *)event)->flags |= GDK_EVENT_PENDING;
2062
2063       node = _gdk_event_queue_append (display, event);
2064
2065       if (gdk_event_translate (display, event, &xevent, FALSE))
2066         {
2067           ((GdkEventPrivate *)event)->flags &= ~GDK_EVENT_PENDING;
2068         }
2069       else
2070         {
2071           _gdk_event_queue_remove_link (display, node);
2072           g_list_free_1 (node);
2073           gdk_event_free (event);
2074         }
2075     }
2076 }
2077
2078 static gboolean
2079 gdk_event_prepare (GSource  *source,
2080                    gint     *timeout)
2081 {
2082   GdkDisplay *display = ((GdkDisplaySource*)source)->display;
2083   gboolean retval;
2084
2085   GDK_THREADS_ENTER ();
2086
2087   *timeout = -1;
2088   retval = (_gdk_event_queue_find_first (display) != NULL ||
2089             gdk_check_xpending (display));
2090
2091   GDK_THREADS_LEAVE ();
2092
2093   return retval;
2094 }
2095
2096 static gboolean
2097 gdk_event_check (GSource *source)
2098 {
2099   GdkDisplaySource *display_source = (GdkDisplaySource*)source;
2100   gboolean retval;
2101
2102   GDK_THREADS_ENTER ();
2103
2104   if (display_source->event_poll_fd.revents & G_IO_IN)
2105     retval = (_gdk_event_queue_find_first (display_source->display) != NULL ||
2106               gdk_check_xpending (display_source->display));
2107   else
2108     retval = FALSE;
2109
2110   GDK_THREADS_LEAVE ();
2111
2112   return retval;
2113 }
2114
2115 static gboolean
2116 gdk_event_dispatch (GSource    *source,
2117                     GSourceFunc callback,
2118                     gpointer    user_data)
2119 {
2120   GdkDisplay *display = ((GdkDisplaySource*)source)->display;
2121   GdkEvent *event;
2122
2123   GDK_THREADS_ENTER ();
2124
2125   _gdk_events_queue (display);
2126   event = _gdk_event_unqueue (display);
2127
2128   if (event)
2129     {
2130       if (_gdk_event_func)
2131         (*_gdk_event_func) (event, _gdk_event_data);
2132
2133       gdk_event_free (event);
2134     }
2135
2136   GDK_THREADS_LEAVE ();
2137
2138   return TRUE;
2139 }
2140
2141 /**
2142  * gdk_event_send_client_message_for_display:
2143  * @display: the #GdkDisplay for the window where the message is to be sent.
2144  * @event: the #GdkEvent to send, which should be a #GdkEventClient.
2145  * @winid: the window to send the client message to.
2146  *
2147  * On X11, sends an X ClientMessage event to a given window. On
2148  * Windows, sends a message registered with the name
2149  * GDK_WIN32_CLIENT_MESSAGE.
2150  *
2151  * This could be used for communicating between different
2152  * applications, though the amount of data is limited to 20 bytes on
2153  * X11, and to just four bytes on Windows.
2154  *
2155  * Returns: non-zero on success.
2156  *
2157  * Since: 2.2
2158  */
2159 gboolean
2160 gdk_event_send_client_message_for_display (GdkDisplay     *display,
2161                                            GdkEvent       *event,
2162                                            GdkNativeWindow winid)
2163 {
2164   XEvent sev;
2165
2166   g_return_val_if_fail(event != NULL, FALSE);
2167
2168   /* Set up our event to send, with the exception of its target window */
2169   sev.xclient.type = ClientMessage;
2170   sev.xclient.display = GDK_DISPLAY_XDISPLAY (display);
2171   sev.xclient.format = event->client.data_format;
2172   sev.xclient.window = winid;
2173   memcpy(&sev.xclient.data, &event->client.data, sizeof (sev.xclient.data));
2174   sev.xclient.message_type = gdk_x11_atom_to_xatom_for_display (display, event->client.message_type);
2175
2176   return _gdk_send_xevent (display, winid, False, NoEventMask, &sev);
2177 }
2178
2179
2180
2181 /* Sends a ClientMessage to all toplevel client windows */
2182 gboolean
2183 gdk_event_send_client_message_to_all_recurse (GdkDisplay *display,
2184                                               XEvent     *xev,
2185                                               guint32     xid,
2186                                               guint       level)
2187 {
2188   Atom type = None;
2189   int format;
2190   unsigned long nitems, after;
2191   unsigned char *data;
2192   Window *ret_children, ret_root, ret_parent;
2193   unsigned int ret_nchildren;
2194   gboolean send = FALSE;
2195   gboolean found = FALSE;
2196   gboolean result = FALSE;
2197   int i;
2198
2199   gdk_error_trap_push ();
2200
2201   if (XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), xid,
2202                           gdk_x11_get_xatom_by_name_for_display (display, "WM_STATE"),
2203                           0, 0, False, AnyPropertyType,
2204                           &type, &format, &nitems, &after, &data) != Success)
2205     goto out;
2206
2207   if (type)
2208     {
2209       send = TRUE;
2210       XFree (data);
2211     }
2212   else
2213     {
2214       /* OK, we're all set, now let's find some windows to send this to */
2215       if (!XQueryTree (GDK_DISPLAY_XDISPLAY (display), xid,
2216                       &ret_root, &ret_parent,
2217                       &ret_children, &ret_nchildren))
2218         goto out;
2219
2220       for(i = 0; i < ret_nchildren; i++)
2221         if (gdk_event_send_client_message_to_all_recurse (display, xev, ret_children[i], level + 1))
2222           found = TRUE;
2223
2224       XFree (ret_children);
2225     }
2226
2227   if (send || (!found && (level == 1)))
2228     {
2229       xev->xclient.window = xid;
2230       _gdk_send_xevent (display, xid, False, NoEventMask, xev);
2231     }
2232
2233   result = send || found;
2234
2235  out:
2236   gdk_error_trap_pop ();
2237
2238   return result;
2239 }
2240
2241 /**
2242  * gdk_screen_broadcast_client_message:
2243  * @screen: the #GdkScreen where the event will be broadcasted.
2244  * @event: the #GdkEvent.
2245  *
2246  * On X11, sends an X ClientMessage event to all toplevel windows on
2247  * @screen.
2248  *
2249  * Toplevel windows are determined by checking for the WM_STATE property,
2250  * as described in the Inter-Client Communication Conventions Manual (ICCCM).
2251  * If no windows are found with the WM_STATE property set, the message is
2252  * sent to all children of the root window.
2253  *
2254  * On Windows, broadcasts a message registered with the name
2255  * GDK_WIN32_CLIENT_MESSAGE to all top-level windows. The amount of
2256  * data is limited to one long, i.e. four bytes.
2257  *
2258  * Since: 2.2
2259  */
2260
2261 void
2262 gdk_screen_broadcast_client_message (GdkScreen *screen,
2263                                      GdkEvent  *event)
2264 {
2265   XEvent sev;
2266   GdkWindow *root_window;
2267
2268   g_return_if_fail (event != NULL);
2269
2270   root_window = gdk_screen_get_root_window (screen);
2271
2272   /* Set up our event to send, with the exception of its target window */
2273   sev.xclient.type = ClientMessage;
2274   sev.xclient.display = GDK_WINDOW_XDISPLAY (root_window);
2275   sev.xclient.format = event->client.data_format;
2276   memcpy(&sev.xclient.data, &event->client.data, sizeof (sev.xclient.data));
2277   sev.xclient.message_type =
2278     gdk_x11_atom_to_xatom_for_display (GDK_WINDOW_DISPLAY (root_window),
2279                                        event->client.message_type);
2280
2281   gdk_event_send_client_message_to_all_recurse (gdk_screen_get_display (screen),
2282                                                 &sev,
2283                                                 GDK_WINDOW_XID (root_window),
2284                                                 0);
2285 }
2286
2287 /*
2288  *--------------------------------------------------------------
2289  * gdk_flush
2290  *
2291  *   Flushes the Xlib output buffer and then waits
2292  *   until all requests have been received and processed
2293  *   by the X server. The only real use for this function
2294  *   is in dealing with XShm.
2295  *
2296  * Arguments:
2297  *
2298  * Results:
2299  *
2300  * Side effects:
2301  *
2302  *--------------------------------------------------------------
2303  */
2304
2305 void
2306 gdk_flush (void)
2307 {
2308   GSList *tmp_list = _gdk_displays;
2309
2310   while (tmp_list)
2311     {
2312       XSync (GDK_DISPLAY_XDISPLAY (tmp_list->data), False);
2313       tmp_list = tmp_list->next;
2314     }
2315 }
2316
2317 static Bool
2318 timestamp_predicate (Display *display,
2319                      XEvent  *xevent,
2320                      XPointer arg)
2321 {
2322   Window xwindow = GPOINTER_TO_UINT (arg);
2323   GdkDisplay *gdk_display = gdk_x11_lookup_xdisplay (display);
2324
2325   if (xevent->type == PropertyNotify &&
2326       xevent->xproperty.window == xwindow &&
2327       xevent->xproperty.atom == gdk_x11_get_xatom_by_name_for_display (gdk_display,
2328                                                                        "GDK_TIMESTAMP_PROP"))
2329     return True;
2330
2331   return False;
2332 }
2333
2334 /**
2335  * gdk_x11_get_server_time:
2336  * @window: a #GdkWindow, used for communication with the server.
2337  *          The window must have GDK_PROPERTY_CHANGE_MASK in its
2338  *          events mask or a hang will result.
2339  *
2340  * Routine to get the current X server time stamp.
2341  *
2342  * Return value: the time stamp.
2343  **/
2344 guint32
2345 gdk_x11_get_server_time (GdkWindow *window)
2346 {
2347   Display *xdisplay;
2348   Window   xwindow;
2349   guchar c = 'a';
2350   XEvent xevent;
2351   Atom timestamp_prop_atom;
2352
2353   g_return_val_if_fail (GDK_IS_WINDOW (window), 0);
2354   g_return_val_if_fail (!GDK_WINDOW_DESTROYED (window), 0);
2355
2356   xdisplay = GDK_WINDOW_XDISPLAY (window);
2357   xwindow = GDK_WINDOW_XWINDOW (window);
2358   timestamp_prop_atom =
2359     gdk_x11_get_xatom_by_name_for_display (GDK_WINDOW_DISPLAY (window),
2360                                            "GDK_TIMESTAMP_PROP");
2361
2362   XChangeProperty (xdisplay, xwindow, timestamp_prop_atom,
2363                    timestamp_prop_atom,
2364                    8, PropModeReplace, &c, 1);
2365
2366   XIfEvent (xdisplay, &xevent,
2367             timestamp_predicate, GUINT_TO_POINTER(xwindow));
2368
2369   return xevent.xproperty.time;
2370 }
2371
2372 static void
2373 fetch_net_wm_check_window (GdkScreen *screen)
2374 {
2375   GdkScreenX11 *screen_x11;
2376   GdkDisplay *display;
2377   Atom type;
2378   gint format;
2379   gulong n_items;
2380   gulong bytes_after;
2381   Window *xwindow;
2382
2383   /* This function is very slow on every call if you are not running a
2384    * spec-supporting WM. For now not optimized, because it isn't in
2385    * any critical code paths, but if you used it somewhere that had to
2386    * be fast you want to avoid "GTK is slow with old WMs" complaints.
2387    * Probably at that point the function should be changed to query
2388    * _NET_SUPPORTING_WM_CHECK only once every 10 seconds or something.
2389    */
2390
2391   screen_x11 = GDK_SCREEN_X11 (screen);
2392   display = screen_x11->display;
2393
2394   if (screen_x11->wmspec_check_window != None)
2395     return; /* already have it */
2396
2397   XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), screen_x11->xroot_window,
2398                       gdk_x11_get_xatom_by_name_for_display (display, "_NET_SUPPORTING_WM_CHECK"),
2399                       0, G_MAXLONG, False, XA_WINDOW, &type, &format,
2400                       &n_items, &bytes_after, (guchar **) & xwindow);
2401
2402   if (type != XA_WINDOW)
2403     return;
2404
2405   gdk_error_trap_push ();
2406
2407   /* Find out if this WM goes away, so we can reset everything. */
2408   XSelectInput (screen_x11->xdisplay, *xwindow, StructureNotifyMask);
2409
2410   screen_x11->wmspec_check_window = *xwindow;
2411   XFree (xwindow);
2412
2413   screen_x11->need_refetch_net_supported = TRUE;
2414   screen_x11->need_refetch_wm_name = TRUE;
2415
2416   /* Careful, reentrancy */
2417   _gdk_x11_screen_window_manager_changed (GDK_SCREEN (screen_x11));
2418 }
2419
2420 /**
2421  * gdk_x11_screen_get_window_manager_name:
2422  * @screen: a #GdkScreen
2423  *
2424  * Returns the name of the window manager for @screen.
2425  *
2426  * Return value: the name of the window manager screen @screen, or
2427  * "unknown" if the window manager is unknown. The string is owned by GDK
2428  * and should not be freed.
2429  *
2430  * Since: 2.2
2431  **/
2432 const char*
2433 gdk_x11_screen_get_window_manager_name (GdkScreen *screen)
2434 {
2435   GdkScreenX11 *screen_x11;
2436
2437   screen_x11 = GDK_SCREEN_X11 (screen);
2438
2439   fetch_net_wm_check_window (screen);
2440
2441   if (screen_x11->need_refetch_wm_name)
2442     {
2443       /* Get the name of the window manager */
2444       screen_x11->need_refetch_wm_name = FALSE;
2445
2446       g_free (screen_x11->window_manager_name);
2447       screen_x11->window_manager_name = g_strdup ("unknown");
2448
2449       if (screen_x11->wmspec_check_window != None)
2450         {
2451           Atom type;
2452           gint format;
2453           gulong n_items;
2454           gulong bytes_after;
2455           guchar *name;
2456
2457           name = NULL;
2458
2459           XGetWindowProperty (GDK_DISPLAY_XDISPLAY (screen_x11->display),
2460                               screen_x11->wmspec_check_window,
2461                               gdk_x11_get_xatom_by_name_for_display (screen_x11->display,
2462                                                                      "_NET_WM_NAME"),
2463                               0, G_MAXLONG, False,
2464                               gdk_x11_get_xatom_by_name_for_display (screen_x11->display,
2465                                                                      "UTF8_STRING"),
2466                               &type, &format,
2467                               &n_items, &bytes_after,
2468                               (guchar **)&name);
2469
2470           gdk_display_sync (screen_x11->display);
2471
2472           gdk_error_trap_pop ();
2473
2474           if (name != NULL)
2475             {
2476               g_free (screen_x11->window_manager_name);
2477               screen_x11->window_manager_name = g_strdup (name);
2478               XFree (name);
2479             }
2480         }
2481     }
2482
2483   return GDK_SCREEN_X11 (screen)->window_manager_name;
2484 }
2485
2486 typedef struct _NetWmSupportedAtoms NetWmSupportedAtoms;
2487
2488 struct _NetWmSupportedAtoms
2489 {
2490   Atom *atoms;
2491   gulong n_atoms;
2492 };
2493
2494 /**
2495  * gdk_x11_screen_supports_net_wm_hint:
2496  * @screen: the relevant #GdkScreen.
2497  * @property: a property atom.
2498  *
2499  * This function is specific to the X11 backend of GDK, and indicates
2500  * whether the window manager supports a certain hint from the
2501  * Extended Window Manager Hints Specification. You can find this
2502  * specification on
2503  * <ulink url="http://www.freedesktop.org">http://www.freedesktop.org</ulink>.
2504  *
2505  * When using this function, keep in mind that the window manager
2506  * can change over time; so you shouldn't use this function in
2507  * a way that impacts persistent application state. A common bug
2508  * is that your application can start up before the window manager
2509  * does when the user logs in, and before the window manager starts
2510  * gdk_x11_screen_supports_net_wm_hint() will return %FALSE for every property.
2511  * You can monitor the window_manager_changed signal on #GdkScreen to detect
2512  * a window manager change.
2513  *
2514  * Return value: %TRUE if the window manager supports @property
2515  *
2516  * Since: 2.2
2517  **/
2518 gboolean
2519 gdk_x11_screen_supports_net_wm_hint (GdkScreen *screen,
2520                                      GdkAtom    property)
2521 {
2522   gulong i;
2523   GdkScreenX11 *screen_x11;
2524   NetWmSupportedAtoms *supported_atoms;
2525   GdkDisplay *display;
2526
2527   g_return_val_if_fail (GDK_IS_SCREEN (screen), FALSE);
2528
2529   screen_x11 = GDK_SCREEN_X11 (screen);
2530   display = screen_x11->display;
2531
2532   supported_atoms = g_object_get_data (G_OBJECT (screen), "gdk-net-wm-supported-atoms");
2533   if (!supported_atoms)
2534     {
2535       supported_atoms = g_new0 (NetWmSupportedAtoms, 1);
2536       g_object_set_data (G_OBJECT (screen), "gdk-net-wm-supported-atoms", supported_atoms);
2537     }
2538
2539   fetch_net_wm_check_window (screen);
2540
2541   if (screen_x11->wmspec_check_window == None)
2542     return FALSE;
2543
2544   if (screen_x11->need_refetch_net_supported)
2545     {
2546       /* WM has changed since we last got the supported list,
2547        * refetch it.
2548        */
2549       Atom type;
2550       gint format;
2551       gulong bytes_after;
2552
2553       screen_x11->need_refetch_net_supported = FALSE;
2554
2555       if (supported_atoms->atoms)
2556         XFree (supported_atoms->atoms);
2557
2558       supported_atoms->atoms = NULL;
2559       supported_atoms->n_atoms = 0;
2560
2561       XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), screen_x11->xroot_window,
2562                           gdk_x11_get_xatom_by_name_for_display (display, "_NET_SUPPORTED"),
2563                           0, G_MAXLONG, False, XA_ATOM, &type, &format,
2564                           &supported_atoms->n_atoms, &bytes_after,
2565                           (guchar **)&supported_atoms->atoms);
2566
2567       if (type != XA_ATOM)
2568         return FALSE;
2569     }
2570
2571   if (supported_atoms->atoms == NULL)
2572     return FALSE;
2573
2574   i = 0;
2575   while (i < supported_atoms->n_atoms)
2576     {
2577       if (supported_atoms->atoms[i] == gdk_x11_atom_to_xatom_for_display (display, property))
2578         return TRUE;
2579
2580       ++i;
2581     }
2582
2583   return FALSE;
2584 }
2585
2586 /**
2587  * gdk_net_wm_supports:
2588  * @property: a property atom.
2589  *
2590  * This function is specific to the X11 backend of GDK, and indicates
2591  * whether the window manager for the default screen supports a certain
2592  * hint from the Extended Window Manager Hints Specification. See
2593  * gdk_x11_screen_supports_net_wm_hint() for complete details.
2594  *
2595  * Return value: %TRUE if the window manager supports @property
2596  **/
2597 gboolean
2598 gdk_net_wm_supports (GdkAtom property)
2599 {
2600   return gdk_x11_screen_supports_net_wm_hint (gdk_screen_get_default (), property);
2601 }
2602
2603 static struct
2604 {
2605   const char *xsettings_name;
2606   const char *gdk_name;
2607 } settings_map[] = {
2608   { "Net/DoubleClickTime", "gtk-double-click-time" },
2609   { "Net/DoubleClickDistance", "gtk-double-click-distance" },
2610   { "Net/DndDragThreshold", "gtk-dnd-drag-threshold" },
2611   { "Gtk/CanChangeAccels", "gtk-can-change-accels" },
2612   { "Gtk/ColorPalette", "gtk-color-palette" },
2613   { "Gtk/FontName", "gtk-font-name" },
2614   { "Gtk/IconSizes", "gtk-icon-sizes" },
2615   { "Gtk/KeyThemeName", "gtk-key-theme-name" },
2616   { "Gtk/ToolbarStyle", "gtk-toolbar-style" },
2617   { "Gtk/ToolbarIconSize", "gtk-toolbar-icon-size" },
2618   { "Gtk/IMPreeditStyle", "gtk-im-preedit-style" },
2619   { "Gtk/IMStatusStyle", "gtk-im-status-style" },
2620   { "Net/CursorBlink", "gtk-cursor-blink" },
2621   { "Net/CursorBlinkTime", "gtk-cursor-blink-time" },
2622   { "Net/ThemeName", "gtk-theme-name" },
2623   { "Net/IconThemeName", "gtk-icon-theme-name" },
2624 };
2625
2626 static void
2627 gdk_xsettings_notify_cb (const char       *name,
2628                          XSettingsAction   action,
2629                          XSettingsSetting *setting,
2630                          void             *data)
2631 {
2632   GdkEvent new_event;
2633   GdkScreen *screen = data;
2634   GdkScreenX11 *screen_x11 = data;
2635   int i;
2636
2637   if (screen_x11->xsettings_in_init)
2638     return;
2639
2640   new_event.type = GDK_SETTING;
2641   new_event.setting.window = gdk_screen_get_root_window (screen);
2642   new_event.setting.send_event = FALSE;
2643   new_event.setting.name = NULL;
2644
2645   for (i = 0; i < G_N_ELEMENTS (settings_map) ; i++)
2646     if (strcmp (settings_map[i].xsettings_name, name) == 0)
2647       {
2648         new_event.setting.name = (char *)settings_map[i].gdk_name;
2649         break;
2650       }
2651
2652   if (!new_event.setting.name)
2653     return;
2654
2655   switch (action)
2656     {
2657     case XSETTINGS_ACTION_NEW:
2658       new_event.setting.action = GDK_SETTING_ACTION_NEW;
2659       break;
2660     case XSETTINGS_ACTION_CHANGED:
2661       new_event.setting.action = GDK_SETTING_ACTION_CHANGED;
2662       break;
2663     case XSETTINGS_ACTION_DELETED:
2664       new_event.setting.action = GDK_SETTING_ACTION_DELETED;
2665       break;
2666     }
2667
2668   gdk_event_put (&new_event);
2669 }
2670
2671 static gboolean
2672 check_transform (const gchar *xsettings_name,
2673                  GType        src_type,
2674                  GType        dest_type)
2675 {
2676   if (!g_value_type_transformable (src_type, dest_type))
2677     {
2678       g_warning ("Cannot tranform xsetting %s of type %s to type %s\n",
2679                  xsettings_name,
2680                  g_type_name (src_type),
2681                  g_type_name (dest_type));
2682       return FALSE;
2683     }
2684   else
2685     return TRUE;
2686 }
2687
2688 /**
2689  * gdk_screen_get_setting:
2690  * @screen: the #GdkScreen where the setting is located
2691  * @name: the name of the setting
2692  * @value: location to store the value of the setting
2693  *
2694  * Retrieves a desktop-wide setting such as double-click time
2695  * for the #GdkScreen @screen.
2696  *
2697  * FIXME needs a list of valid settings here, or a link to
2698  * more information.
2699  *
2700  * Returns: %TRUE if the setting existed and a value was stored
2701  *   in @value, %FALSE otherwise.
2702  *
2703  * Since: 2.2
2704  **/
2705 gboolean
2706 gdk_screen_get_setting (GdkScreen   *screen,
2707                         const gchar *name,
2708                         GValue      *value)
2709 {
2710
2711   const char *xsettings_name = NULL;
2712   XSettingsResult result;
2713   XSettingsSetting *setting;
2714   GdkScreenX11 *screen_x11;
2715   gboolean success = FALSE;
2716   gint i;
2717   GValue tmp_val = { 0, };
2718
2719   g_return_val_if_fail (GDK_IS_SCREEN (screen), FALSE);
2720
2721   screen_x11 = GDK_SCREEN_X11 (screen);
2722
2723   for (i = 0; i < G_N_ELEMENTS (settings_map) ; i++)
2724     if (strcmp (settings_map[i].gdk_name, name) == 0)
2725       {
2726         xsettings_name = settings_map[i].xsettings_name;
2727         break;
2728       }
2729
2730   if (!xsettings_name)
2731     return FALSE;
2732
2733   result = xsettings_client_get_setting (screen_x11->xsettings_client,
2734                                          xsettings_name, &setting);
2735   if (result != XSETTINGS_SUCCESS)
2736     return FALSE;
2737
2738   switch (setting->type)
2739     {
2740     case XSETTINGS_TYPE_INT:
2741       if (check_transform (xsettings_name, G_TYPE_INT, G_VALUE_TYPE (value)))
2742         {
2743           g_value_init (&tmp_val, G_TYPE_INT);
2744           g_value_set_int (&tmp_val, setting->data.v_int);
2745           g_value_transform (&tmp_val, value);
2746
2747           success = TRUE;
2748         }
2749       break;
2750     case XSETTINGS_TYPE_STRING:
2751       if (check_transform (xsettings_name, G_TYPE_STRING, G_VALUE_TYPE (value)))
2752         {
2753           g_value_init (&tmp_val, G_TYPE_STRING);
2754           g_value_set_string (&tmp_val, setting->data.v_string);
2755           g_value_transform (&tmp_val, value);
2756
2757           success = TRUE;
2758         }
2759       break;
2760     case XSETTINGS_TYPE_COLOR:
2761       if (!check_transform (xsettings_name, GDK_TYPE_COLOR, G_VALUE_TYPE (value)))
2762         {
2763           GdkColor color;
2764
2765           g_value_init (&tmp_val, GDK_TYPE_COLOR);
2766
2767           color.pixel = 0;
2768           color.red = setting->data.v_color.red;
2769           color.green = setting->data.v_color.green;
2770           color.blue = setting->data.v_color.blue;
2771
2772           g_value_set_boxed (&tmp_val, &color);
2773
2774           g_value_transform (&tmp_val, value);
2775
2776           success = TRUE;
2777         }
2778       break;
2779     }
2780
2781   g_value_unset (&tmp_val);
2782
2783   xsettings_setting_free (setting);
2784
2785   return success;
2786 }
2787
2788 static GdkFilterReturn
2789 gdk_xsettings_client_event_filter (GdkXEvent *xevent,
2790                                    GdkEvent  *event,
2791                                    gpointer   data)
2792 {
2793   GdkScreenX11 *screen = data;
2794
2795   if (xsettings_client_process_event (screen->xsettings_client, (XEvent *)xevent))
2796     return GDK_FILTER_REMOVE;
2797   else
2798     return GDK_FILTER_CONTINUE;
2799 }
2800
2801 static void
2802 gdk_xsettings_watch_cb (Window   window,
2803                         Bool     is_start,
2804                         long     mask,
2805                         void    *cb_data)
2806 {
2807   GdkWindow *gdkwin;
2808   GdkScreen *screen = cb_data;
2809
2810   gdkwin = gdk_window_lookup_for_display (gdk_screen_get_display (screen), window);
2811
2812   if (is_start)
2813     {
2814       if (!gdkwin)
2815         gdkwin = gdk_window_foreign_new_for_display (gdk_screen_get_display (screen), window);
2816       else
2817         g_object_ref (gdkwin);
2818
2819       gdk_window_add_filter (gdkwin, gdk_xsettings_client_event_filter, screen);
2820     }
2821   else
2822     {
2823       g_assert (gdkwin);
2824       gdk_window_remove_filter (gdkwin, gdk_xsettings_client_event_filter, screen);
2825       g_object_unref (gdkwin);
2826     }
2827 }