Pileus Git - ~andy/gtk/blob - gtk/gtkplug.c

   1 /* GTK - The GIMP Toolkit
   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 Free
  16  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  */
  18
  19 /* By Owen Taylor <otaylor@gtk.org>              98/4/4 */
  20
  21 /*
  22  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  23  * file for a list of people on the GTK+ Team.  See the ChangeLog
  24  * files for a list of changes.  These files are distributed with
  25  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  26  */
  27
  28 #include "gtkmain.h"
  29 #include "gtkplug.h"
  30
  31 #include "gdk/gdkkeysyms.h"
  32 #include "x11/gdkx.h"
  33
  34 #include "xembed.h"
  35
  36 static void            gtk_plug_class_init            (GtkPlugClass     *klass);
  37 static void            gtk_plug_init                  (GtkPlug          *plug);
  38 static void            gtk_plug_realize               (GtkWidget        *widget);
  39 static void            gtk_plug_unrealize             (GtkWidget        *widget);
  40 static gboolean        gtk_plug_key_press_event       (GtkWidget        *widget,
  41                                                        GdkEventKey      *event);
  42 static void            gtk_plug_forward_key_press     (GtkPlug          *plug,
  43                                                        GdkEventKey      *event);
  44 static void            gtk_plug_set_focus             (GtkWindow        *window,
  45                                                        GtkWidget        *focus);
  46 static gboolean        gtk_plug_focus                 (GtkContainer     *container,
  47                                                        GtkDirectionType  direction);
  48 static void            gtk_plug_accel_entries_changed (GtkWindow        *window);
  49 static GdkFilterReturn gtk_plug_filter_func           (GdkXEvent        *gdk_xevent,
  50                                                        GdkEvent         *event,
  51                                                        gpointer          data);
  52
  53 static void gtk_plug_free_grabbed_keys (GHashTable *key_table);
  54 static void handle_modality_off        (GtkPlug    *plug);
  55 static void send_xembed_message        (GtkPlug    *plug,
  56                                         glong       message,
  57                                         glong       detail,
  58                                         glong       data1,
  59                                         glong       data2,
  60                                         guint32     time);
  61
  62 /* From Tk */
  63 #define EMBEDDED_APP_WANTS_FOCUS NotifyNormal+20
  64
  65 static GtkWindowClass *parent_class = NULL;
  66
  67 GtkType
  68 gtk_plug_get_type ()
  69 {
  70   static GtkType plug_type = 0;
  71
  72   if (!plug_type)
  73     {
  74       static const GTypeInfo plug_info =
  75       {
  76         sizeof (GtkPlugClass),
  77         NULL,           /* base_init */
  78         NULL,           /* base_finalize */
  79         (GClassInitFunc) gtk_plug_class_init,
  80         NULL,           /* class_finalize */
  81         NULL,           /* class_data */
  82         sizeof (GtkPlug),
  83         16,             /* n_preallocs */
  84         (GInstanceInitFunc) gtk_plug_init,
  85       };
  86
  87       plug_type = g_type_register_static (GTK_TYPE_WINDOW, "GtkPlug", &plug_info, 0);
  88     }
  89
  90   return plug_type;
  91 }
  92
  93 static void
  94 gtk_plug_class_init (GtkPlugClass *class)
  95 {
  96   GtkWidgetClass *widget_class = (GtkWidgetClass *)class;
  97   GtkContainerClass *container_class = (GtkContainerClass *)class;
  98   GtkWindowClass *window_class = (GtkWindowClass *)class;
  99
 100   parent_class = gtk_type_class (GTK_TYPE_WINDOW);
 101
 102   widget_class->realize = gtk_plug_realize;
 103   widget_class->unrealize = gtk_plug_unrealize;
 104   widget_class->key_press_event = gtk_plug_key_press_event;
 105
 106   container_class->focus = gtk_plug_focus;
 107
 108   window_class->set_focus = gtk_plug_set_focus;
 109 #if 0
 110   window_class->accel_entries_changed = gtk_plug_accel_entries_changed;
 111 #endif
 112 }
 113
 114 static void
 115 gtk_plug_init (GtkPlug *plug)
 116 {
 117   GtkWindow *window;
 118
 119   window = GTK_WINDOW (plug);
 120
 121   window->type = GTK_WINDOW_TOPLEVEL;
 122   window->auto_shrink = TRUE;
 123
 124 #if 0
 125   gtk_window_set_grab_group (window, window);
 126 #endif
 127 }
 128
 129 void
 130 gtk_plug_construct (GtkPlug *plug, GdkNativeWindow socket_id)
 131 {
 132   if (socket_id)
 133     {
 134       plug->socket_window = gdk_window_lookup (socket_id);
 135       plug->same_app = TRUE;
 136
 137       if (plug->socket_window == NULL)
 138         {
 139           plug->socket_window = gdk_window_foreign_new (socket_id);
 140           plug->same_app = FALSE;
 141         }
 142     }
 143 }
 144
 145 GtkWidget*
 146 gtk_plug_new (GdkNativeWindow socket_id)
 147 {
 148   GtkPlug *plug;
 149
 150   plug = GTK_PLUG (gtk_type_new (GTK_TYPE_PLUG));
 151   gtk_plug_construct (plug, socket_id);
 152   return GTK_WIDGET (plug);
 153 }
 154
 155 static void
 156 gtk_plug_unrealize (GtkWidget *widget)
 157 {
 158   GtkPlug *plug;
 159
 160   g_return_if_fail (widget != NULL);
 161   g_return_if_fail (GTK_IS_PLUG (widget));
 162
 163   plug = GTK_PLUG (widget);
 164
 165   if (plug->socket_window != NULL)
 166     {
 167       gdk_window_set_user_data (plug->socket_window, NULL);
 168       gdk_window_unref (plug->socket_window);
 169       plug->socket_window = NULL;
 170     }
 171
 172 #if 0
 173   if (plug->modality_window)
 174     handle_modality_off (plug);
 175 #endif
 176
 177   if (GTK_WIDGET_CLASS (parent_class)->unrealize)
 178     (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 179 }
 180
 181 static void
 182 gtk_plug_realize (GtkWidget *widget)
 183 {
 184   GtkWindow *window;
 185   GtkPlug *plug;
 186   GdkWindowAttr attributes;
 187   gint attributes_mask;
 188
 189   g_return_if_fail (widget != NULL);
 190   g_return_if_fail (GTK_IS_PLUG (widget));
 191
 192   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 193   window = GTK_WINDOW (widget);
 194   plug = GTK_PLUG (widget);
 195
 196   attributes.window_type = GDK_WINDOW_CHILD;    /* XXX GDK_WINDOW_PLUG ? */
 197   attributes.title = window->title;
 198   attributes.wmclass_name = window->wmclass_name;
 199   attributes.wmclass_class = window->wmclass_class;
 200   attributes.width = widget->allocation.width;
 201   attributes.height = widget->allocation.height;
 202   attributes.wclass = GDK_INPUT_OUTPUT;
 203
 204   /* this isn't right - we should match our parent's visual/colormap.
 205    * though that will require handling "foreign" colormaps */
 206   attributes.visual = gtk_widget_get_visual (widget);
 207   attributes.colormap = gtk_widget_get_colormap (widget);
 208   attributes.event_mask = gtk_widget_get_events (widget);
 209   attributes.event_mask |= (GDK_EXPOSURE_MASK |
 210                             GDK_KEY_PRESS_MASK |
 211                             GDK_ENTER_NOTIFY_MASK |
 212                             GDK_LEAVE_NOTIFY_MASK |
 213                             GDK_FOCUS_CHANGE_MASK |
 214                             GDK_STRUCTURE_MASK);
 215
 216   attributes_mask = GDK_WA_VISUAL | GDK_WA_COLORMAP;
 217   attributes_mask |= (window->title ? GDK_WA_TITLE : 0);
 218   attributes_mask |= (window->wmclass_name ? GDK_WA_WMCLASS : 0);
 219
 220   gdk_error_trap_push ();
 221   widget->window = gdk_window_new (plug->socket_window,
 222                                    &attributes, attributes_mask);
 223   gdk_flush ();
 224   if (gdk_error_trap_pop ()) /* Uh-oh */
 225     {
 226       gdk_error_trap_push ();
 227       gdk_window_destroy (widget->window);
 228       gdk_flush ();
 229       gdk_error_trap_pop ();
 230       widget->window = gdk_window_new (NULL, &attributes, attributes_mask);
 231     }
 232
 233   GDK_WINDOW_TYPE (widget->window) = GDK_WINDOW_TOPLEVEL;
 234   gdk_window_set_user_data (widget->window, window);
 235
 236   widget->style = gtk_style_attach (widget->style, widget->window);
 237   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 238
 239   gdk_window_add_filter (widget->window, gtk_plug_filter_func, widget);
 240 }
 241
 242 static gboolean
 243 gtk_plug_key_press_event (GtkWidget   *widget,
 244                           GdkEventKey *event)
 245 {
 246   if (!GTK_WINDOW (widget)->has_focus)
 247     {
 248       gtk_plug_forward_key_press (GTK_PLUG (widget), event);
 249       return TRUE;
 250     }
 251   else
 252     return GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, event);
 253 }
 254
 255 static void
 256 gtk_plug_forward_key_press (GtkPlug *plug, GdkEventKey *event)
 257 {
 258   XEvent xevent;
 259
 260   xevent.xkey.type = KeyPress;
 261   xevent.xkey.display = GDK_WINDOW_XDISPLAY (GTK_WIDGET(plug)->window);
 262   xevent.xkey.window = GDK_WINDOW_XWINDOW (plug->socket_window);
 263   xevent.xkey.root = GDK_ROOT_WINDOW (); /* FIXME */
 264   xevent.xkey.time = event->time;
 265   /* FIXME, the following might cause big problems for
 266    * non-GTK apps */
 267   xevent.xkey.x = 0;
 268   xevent.xkey.y = 0;
 269   xevent.xkey.x_root = 0;
 270   xevent.xkey.y_root = 0;
 271   xevent.xkey.state = event->state;
 272   xevent.xkey.keycode =  XKeysymToKeycode(GDK_DISPLAY(),
 273                                           event->keyval);
 274   xevent.xkey.same_screen = TRUE; /* FIXME ? */
 275
 276   gdk_error_trap_push ();
 277   XSendEvent (gdk_display,
 278               GDK_WINDOW_XWINDOW (plug->socket_window),
 279               False, NoEventMask, &xevent);
 280   gdk_flush ();
 281   gdk_error_trap_pop ();
 282 }
 283
 284 static void
 285 gtk_plug_set_focus (GtkWindow *window,
 286                     GtkWidget *focus)
 287 {
 288   GtkPlug *plug = GTK_PLUG (window);
 289
 290   GTK_WINDOW_CLASS (parent_class)->set_focus (window, focus);
 291
 292   /* Ask for focus from embedder
 293    */
 294
 295   if (focus && !window->has_focus)
 296     {
 297 #if 0
 298       XEvent xevent;
 299
 300       xevent.xfocus.type = FocusIn;
 301       xevent.xfocus.display = GDK_WINDOW_XDISPLAY (GTK_WIDGET(plug)->window);
 302       xevent.xfocus.window = GDK_WINDOW_XWINDOW (plug->socket_window);
 303       xevent.xfocus.mode = EMBEDDED_APP_WANTS_FOCUS;
 304       xevent.xfocus.detail = FALSE; /* Don't force */
 305
 306       gdk_error_trap_push ();
 307       XSendEvent (gdk_display,
 308                   GDK_WINDOW_XWINDOW (plug->socket_window),
 309                   False, NoEventMask, &xevent);
 310       gdk_flush ();
 311       gdk_error_trap_pop ();
 312 #endif
 313
 314       send_xembed_message (plug, XEMBED_REQUEST_FOCUS, 0, 0, 0,
 315                            gtk_get_current_event_time ());
 316     }
 317 }
 318
 319 #if 0
 320
 321 typedef struct
 322 {
 323   guint                  accelerator_key;
 324   GdkModifierType        accelerator_mods;
 325 } GrabbedKey;
 326
 327 static guint
 328 grabbed_key_hash (gconstpointer a)
 329 {
 330   const GrabbedKey *key = a;
 331   guint h;
 332
 333   h = key->accelerator_key << 16;
 334   h ^= key->accelerator_key >> 16;
 335   h ^= key->accelerator_mods;
 336
 337   return h;
 338 }
 339
 340 static gboolean
 341 grabbed_key_equal (gconstpointer a, gconstpointer b)
 342 {
 343   const GrabbedKey *keya = a;
 344   const GrabbedKey *keyb = b;
 345
 346   return (keya->accelerator_key == keyb->accelerator_key &&
 347           keya->accelerator_mods == keyb->accelerator_mods);
 348 }
 349
 350 static void
 351 add_grabbed_keys (gpointer key, gpointer val, gpointer data)
 352 {
 353   GrabbedKey *grabbed_key = key;
 354   GtkPlug *plug = data;
 355
 356   if (!plug->grabbed_keys ||
 357       !g_hash_table_lookup (plug->grabbed_keys, grabbed_key))
 358     {
 359       send_xembed_message (plug, XEMBED_GRAB_KEY, 0,
 360                            grabbed_key->accelerator_key, grabbed_key->accelerator_mods,
 361                            gtk_get_current_event_time ());
 362     }
 363 }
 364
 365 static void
 366 remove_grabbed_keys (gpointer key, gpointer val, gpointer data)
 367 {
 368   GrabbedKey *grabbed_key = key;
 369   GtkPlug *plug = data;
 370
 371   if (!plug->grabbed_keys ||
 372       !g_hash_table_lookup (plug->grabbed_keys, grabbed_key))
 373     {
 374       send_xembed_message (plug, XEMBED_UNGRAB_KEY, 0,
 375                            grabbed_key->accelerator_key, grabbed_key->accelerator_mods,
 376                            gtk_get_current_event_time ());
 377     }
 378 }
 379
 380 static void
 381 gtk_plug_free_grabbed_keys (GHashTable *key_table)
 382 {
 383   g_hash_table_foreach (key_table, (GHFunc)g_free, NULL);
 384   g_hash_table_destroy (key_table);
 385 }
 386
 387 static void
 388 gtk_plug_accel_entries_changed (GtkWindow *window)
 389 {
 390   GHashTable *new_grabbed_keys, *old_grabbed_keys;
 391   GSList *accel_groups, *tmp_list;
 392   GtkPlug *plug = GTK_PLUG (window);
 393
 394   new_grabbed_keys = g_hash_table_new (grabbed_key_hash, grabbed_key_equal);
 395
 396   accel_groups = gtk_accel_groups_from_object (GTK_OBJECT (window));
 397
 398   tmp_list = accel_groups;
 399
 400   while (tmp_list)
 401     {
 402       GtkAccelGroup *accel_group = tmp_list->data;
 403       gint i, n_entries;
 404       GtkAccelEntry *entries;
 405
 406       gtk_accel_group_get_entries (accel_group, &entries, &n_entries);
 407
 408       for (i = 0; i < n_entries; i++)
 409         {
 410           GdkKeymapKey *keys;
 411           gint n_keys;
 412
 413           if (gdk_keymap_get_entries_for_keyval (NULL, entries[i].accelerator_key, &keys, &n_keys))
 414             {
 415               GrabbedKey *key = g_new (GrabbedKey, 1);
 416
 417               key->accelerator_key = keys[0].keycode;
 418               key->accelerator_mods = entries[i].accelerator_mods;
 419
 420               g_hash_table_insert (new_grabbed_keys, key, key);
 421
 422               g_free (keys);
 423             }
 424         }
 425
 426       tmp_list = tmp_list->next;
 427     }
 428
 429   g_hash_table_foreach (new_grabbed_keys, add_grabbed_keys, plug);
 430
 431   old_grabbed_keys = plug->grabbed_keys;
 432   plug->grabbed_keys = new_grabbed_keys;
 433
 434   if (old_grabbed_keys)
 435     {
 436       g_hash_table_foreach (old_grabbed_keys, remove_grabbed_keys, plug);
 437       gtk_plug_free_grabbed_keys (old_grabbed_keys);
 438     }
 439
 440 }
 441 #endif
 442
 443 static gboolean
 444 gtk_plug_focus (GtkContainer     *container,
 445                 GtkDirectionType  direction)
 446 {
 447   GtkBin *bin = GTK_BIN (container);
 448   GtkPlug *plug = GTK_PLUG (container);
 449   GtkWindow *window = GTK_WINDOW (container);
 450   GtkWidget *old_focus_child = container->focus_child;
 451   GtkWidget *parent;
 452
 453   /* We override GtkWindow's behavior, since we don't want wrapping here.
 454    */
 455   if (old_focus_child)
 456     {
 457       if (GTK_IS_CONTAINER (old_focus_child) &&
 458           GTK_WIDGET_DRAWABLE (old_focus_child) &&
 459           GTK_WIDGET_IS_SENSITIVE (old_focus_child) &&
 460           gtk_container_focus (GTK_CONTAINER (old_focus_child), direction))
 461         return TRUE;
 462
 463       if (window->focus_widget)
 464         {
 465           /* Wrapped off the end, clear the focus setting for the toplevel */
 466           parent = window->focus_widget->parent;
 467           while (parent)
 468             {
 469               gtk_container_set_focus_child (GTK_CONTAINER (parent), NULL);
 470               parent = GTK_WIDGET (parent)->parent;
 471             }
 472
 473           gtk_window_set_focus (GTK_WINDOW (container), NULL);
 474
 475           if (!GTK_CONTAINER (window)->focus_child)
 476             {
 477               gint message = -1;
 478
 479               switch (direction)
 480                 {
 481                 case GTK_DIR_UP:
 482                 case GTK_DIR_LEFT:
 483                 case GTK_DIR_TAB_BACKWARD:
 484                   message = XEMBED_FOCUS_PREV;
 485                   break;
 486                 case GTK_DIR_DOWN:
 487                 case GTK_DIR_RIGHT:
 488                 case GTK_DIR_TAB_FORWARD:
 489                   message = XEMBED_FOCUS_NEXT;
 490                   break;
 491                 }
 492
 493               send_xembed_message (plug, message, 0, 0, 0,
 494                                    gtk_get_current_event_time ());
 495
 496 #if 0
 497               gtk_window_set_focus (GTK_WINDOW (widget), NULL);
 498
 499               gdk_error_trap_push ();
 500               XSetInputFocus (GDK_DISPLAY (),
 501                               GDK_WINDOW_XWINDOW (plug->socket_window),
 502                               RevertToParent, event->time);
 503               gdk_flush ();
 504               gdk_error_trap_pop ();
 505
 506               gtk_plug_forward_key_press (plug, event);
 507 #endif
 508             }
 509         }
 510
 511       return FALSE;
 512     }
 513   else
 514     {
 515       /* Try to focus the first widget in the window */
 516       if (GTK_WIDGET_DRAWABLE (bin->child) &&
 517           GTK_WIDGET_IS_SENSITIVE (bin->child))
 518         {
 519           if (GTK_IS_CONTAINER (bin->child))
 520             {
 521               if (gtk_container_focus (GTK_CONTAINER (bin->child), direction))
 522                 return TRUE;
 523             }
 524           else if (GTK_WIDGET_CAN_FOCUS (bin->child))
 525             {
 526               gtk_widget_grab_focus (bin->child);
 527               return TRUE;
 528             }
 529         }
 530     }
 531
 532   return FALSE;
 533 }
 534
 535 static void
 536 send_xembed_message (GtkPlug *plug,
 537                      glong      message,
 538                      glong      detail,
 539                      glong      data1,
 540                      glong      data2,
 541                      guint32    time)
 542 {
 543   if (plug->socket_window)
 544     {
 545       XEvent xevent;
 546
 547       xevent.xclient.window = GDK_WINDOW_XWINDOW (plug->socket_window);
 548       xevent.xclient.type = ClientMessage;
 549       xevent.xclient.message_type = gdk_atom_intern ("_XEMBED", FALSE);
 550       xevent.xclient.format = 32;
 551       xevent.xclient.data.l[0] = time;
 552       xevent.xclient.data.l[1] = message;
 553       xevent.xclient.data.l[2] = detail;
 554       xevent.xclient.data.l[3] = data1;
 555       xevent.xclient.data.l[4] = data2;
 556
 557       gdk_error_trap_push ();
 558       XSendEvent (gdk_display,
 559                   GDK_WINDOW_XWINDOW (plug->socket_window),
 560                   False, NoEventMask, &xevent);
 561       gdk_flush ();
 562       gdk_error_trap_pop ();
 563     }
 564 }
 565
 566 static void
 567 focus_first_last (GtkPlug          *plug,
 568                   GtkDirectionType  direction)
 569 {
 570   GtkWindow *window = GTK_WINDOW (plug);
 571   GtkWidget *parent;
 572
 573   if (window->focus_widget)
 574     {
 575       parent = window->focus_widget->parent;
 576       while (parent)
 577         {
 578           gtk_container_set_focus_child (GTK_CONTAINER (parent), NULL);
 579           parent = GTK_WIDGET (parent)->parent;
 580         }
 581
 582       gtk_window_set_focus (GTK_WINDOW (plug), NULL);
 583     }
 584
 585   gtk_container_focus (GTK_CONTAINER (plug), direction);
 586 }
 587
 588 static void
 589 handle_modality_on (GtkPlug *plug)
 590 {
 591 #if 0
 592   if (!plug->modality_window)
 593     {
 594       plug->modality_window = gtk_window_new (GTK_WINDOW_POPUP);
 595       gtk_window_set_grab_group (GTK_WINDOW (plug->modality_window), GTK_WINDOW (plug));
 596       gtk_grab_add (plug->modality_window);
 597     }
 598 #endif
 599 }
 600
 601 static void
 602 handle_modality_off (GtkPlug *plug)
 603 {
 604 #if 0
 605   if (plug->modality_window)
 606     {
 607       gtk_grab_remove (plug->modality_window);
 608       gtk_widget_destroy (plug->modality_window);
 609       plug->modality_window = NULL;
 610     }
 611 #endif
 612 }
 613
 614 static void
 615 handle_xembed_message (GtkPlug   *plug,
 616                        glong      message,
 617                        glong      detail,
 618                        glong      data1,
 619                        glong      data2,
 620                        guint32    time)
 621 {
 622   GTK_NOTE (PLUGSOCKET,
 623             g_message ("Message of type %ld received", message));
 624
 625   switch (message)
 626     {
 627     case XEMBED_EMBEDDED_NOTIFY:
 628       break;
 629     case XEMBED_WINDOW_ACTIVATE:
 630       GTK_NOTE(PLUGSOCKET,
 631                g_message ("GtkPlug: ACTIVATE received"));
 632       break;
 633     case XEMBED_WINDOW_DEACTIVATE:
 634       GTK_NOTE(PLUGSOCKET,
 635                g_message ("GtkPlug: DEACTIVATE received"));
 636       break;
 637
 638     case XEMBED_MODALITY_ON:
 639       handle_modality_on (plug);
 640       break;
 641     case XEMBED_MODALITY_OFF:
 642       handle_modality_off (plug);
 643       break;
 644
 645     case XEMBED_FOCUS_IN:
 646       switch (detail)
 647         {
 648         case XEMBED_FOCUS_FIRST:
 649           focus_first_last (plug, GTK_DIR_TAB_FORWARD);
 650           break;
 651         case XEMBED_FOCUS_LAST:
 652           focus_first_last (plug, GTK_DIR_TAB_BACKWARD);
 653           break;
 654         case XEMBED_FOCUS_CURRENT:
 655           /* fall through */;
 656         }
 657
 658     case XEMBED_FOCUS_OUT:
 659       {
 660         GdkEvent event;
 661
 662         event.focus_change.type = GDK_FOCUS_CHANGE;
 663         event.focus_change.window = GTK_WIDGET (plug)->window;
 664         event.focus_change.send_event = TRUE;
 665         event.focus_change.in = (message == XEMBED_FOCUS_IN);
 666
 667         gtk_widget_event (GTK_WIDGET (plug), &event);
 668
 669         break;
 670       }
 671
 672     case XEMBED_REQUEST_FOCUS:
 673     case XEMBED_FOCUS_NEXT:
 674     case XEMBED_FOCUS_PREV:
 675     case XEMBED_GRAB_KEY:
 676     case XEMBED_UNGRAB_KEY:
 677       g_warning ("GtkPlug: Invalid _XEMBED message of type %ld received", message);
 678       break;
 679
 680     default:
 681       GTK_NOTE(PLUGSOCKET,
 682                g_message ("GtkPlug: Ignoring unknown _XEMBED message of type %ld", message));
 683       break;
 684     }
 685 }
 686
 687 static GdkFilterReturn
 688 gtk_plug_filter_func (GdkXEvent *gdk_xevent, GdkEvent *event, gpointer data)
 689 {
 690   GtkPlug *plug = GTK_PLUG (data);
 691   XEvent *xevent = (XEvent *)gdk_xevent;
 692
 693   GdkFilterReturn return_val;
 694
 695   return_val = GDK_FILTER_CONTINUE;
 696
 697   switch (xevent->type)
 698     {
 699     case ClientMessage:
 700       if (xevent->xclient.message_type == gdk_atom_intern ("_XEMBED", FALSE))
 701         {
 702           handle_xembed_message (plug,
 703                                  xevent->xclient.data.l[1],
 704                                  xevent->xclient.data.l[2],
 705                                  xevent->xclient.data.l[3],
 706                                  xevent->xclient.data.l[4],
 707                                  xevent->xclient.data.l[0]);
 708
 709
 710           return GDK_FILTER_REMOVE;
 711         }
 712       break;
 713     }
 714
 715   return GDK_FILTER_CONTINUE;
 716 }