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 "gtkmarshalers.h"
  30 #include "gtkplug.h"
  31 #include "gtkprivate.h"
  32
  33 #include "gdk/gdkkeysyms.h"
  34 #include "x11/gdkx.h"
  35
  36 #include "xembed.h"
  37
  38 static void            gtk_plug_class_init            (GtkPlugClass     *klass);
  39 static void            gtk_plug_init                  (GtkPlug          *plug);
  40 static void            gtk_plug_realize               (GtkWidget        *widget);
  41 static void            gtk_plug_unrealize             (GtkWidget        *widget);
  42 static void            gtk_plug_show                  (GtkWidget        *widget);
  43 static void            gtk_plug_hide                  (GtkWidget        *widget);
  44 static void            gtk_plug_map                   (GtkWidget        *widget);
  45 static void            gtk_plug_unmap                 (GtkWidget        *widget);
  46 static void            gtk_plug_size_allocate         (GtkWidget        *widget,
  47                                                        GtkAllocation    *allocation);
  48 static gboolean        gtk_plug_key_press_event       (GtkWidget        *widget,
  49                                                        GdkEventKey      *event);
  50 static void            gtk_plug_forward_key_press     (GtkPlug          *plug,
  51                                                        GdkEventKey      *event);
  52 static void            gtk_plug_set_focus             (GtkWindow        *window,
  53                                                        GtkWidget        *focus);
  54 static gboolean        gtk_plug_focus                 (GtkWidget        *widget,
  55                                                        GtkDirectionType  direction);
  56 static void            gtk_plug_check_resize          (GtkContainer     *container);
  57 #if 0
  58 static void            gtk_plug_accel_entries_changed (GtkWindow        *window);
  59 #endif
  60 static GdkFilterReturn gtk_plug_filter_func           (GdkXEvent        *gdk_xevent,
  61                                                        GdkEvent         *event,
  62                                                        gpointer          data);
  63
  64 #if 0
  65 static void gtk_plug_free_grabbed_keys (GHashTable    *key_table);
  66 #endif
  67 static void handle_modality_off        (GtkPlug       *plug);
  68 static void send_xembed_message        (GtkPlug       *plug,
  69                                         glong          message,
  70                                         glong          detail,
  71                                         glong          data1,
  72                                         glong          data2,
  73                                         guint32        time);
  74 static void xembed_set_info            (GdkWindow     *window,
  75                                         unsigned long  flags);
  76
  77 /* From Tk */
  78 #define EMBEDDED_APP_WANTS_FOCUS NotifyNormal+20
  79
  80 static GtkWindowClass *parent_class = NULL;
  81 static GtkBinClass *bin_class = NULL;
  82
  83 enum {
  84   EMBEDDED,
  85   LAST_SIGNAL
  86 };
  87
  88 static guint plug_signals[LAST_SIGNAL] = { 0 };
  89
  90 GtkType
  91 gtk_plug_get_type ()
  92 {
  93   static GtkType plug_type = 0;
  94
  95   if (!plug_type)
  96     {
  97       static const GTypeInfo plug_info =
  98       {
  99         sizeof (GtkPlugClass),
 100         NULL,           /* base_init */
 101         NULL,           /* base_finalize */
 102         (GClassInitFunc) gtk_plug_class_init,
 103         NULL,           /* class_finalize */
 104         NULL,           /* class_data */
 105         sizeof (GtkPlug),
 106         16,             /* n_preallocs */
 107         (GInstanceInitFunc) gtk_plug_init,
 108       };
 109
 110       plug_type = g_type_register_static (GTK_TYPE_WINDOW, "GtkPlug", &plug_info, 0);
 111     }
 112
 113   return plug_type;
 114 }
 115
 116 static void
 117 gtk_plug_class_init (GtkPlugClass *class)
 118 {
 119   GtkWidgetClass *widget_class = (GtkWidgetClass *)class;
 120   GtkWindowClass *window_class = (GtkWindowClass *)class;
 121   GtkContainerClass *container_class = (GtkContainerClass *)class;
 122
 123   parent_class = gtk_type_class (GTK_TYPE_WINDOW);
 124   bin_class = gtk_type_class (GTK_TYPE_BIN);
 125
 126   widget_class->realize = gtk_plug_realize;
 127   widget_class->unrealize = gtk_plug_unrealize;
 128   widget_class->key_press_event = gtk_plug_key_press_event;
 129
 130   widget_class->show = gtk_plug_show;
 131   widget_class->hide = gtk_plug_hide;
 132   widget_class->map = gtk_plug_map;
 133   widget_class->unmap = gtk_plug_unmap;
 134   widget_class->size_allocate = gtk_plug_size_allocate;
 135
 136   widget_class->focus = gtk_plug_focus;
 137
 138   container_class->check_resize = gtk_plug_check_resize;
 139
 140   window_class->set_focus = gtk_plug_set_focus;
 141 #if 0
 142   window_class->accel_entries_changed = gtk_plug_accel_entries_changed;
 143 #endif
 144
 145   plug_signals[EMBEDDED] =
 146     g_signal_new ("embedded",
 147                   G_OBJECT_CLASS_TYPE (class),
 148                   G_SIGNAL_RUN_LAST,
 149                   G_STRUCT_OFFSET (GtkPlugClass, embedded),
 150                   NULL, NULL,
 151                   _gtk_marshal_VOID__VOID,
 152                   GTK_TYPE_NONE, 0);
 153 }
 154
 155 static void
 156 gtk_plug_init (GtkPlug *plug)
 157 {
 158   GtkWindow *window;
 159
 160   window = GTK_WINDOW (plug);
 161
 162   window->type = GTK_WINDOW_TOPLEVEL;
 163 }
 164
 165 static void
 166 gtk_plug_set_is_child (GtkPlug  *plug,
 167                        gboolean  is_child)
 168 {
 169   g_assert (!GTK_WIDGET (plug)->parent);
 170
 171   if (is_child)
 172     {
 173       if (plug->modality_window)
 174         handle_modality_off (plug);
 175
 176       if (plug->modality_group)
 177         {
 178           gtk_window_group_remove_window (plug->modality_group, GTK_WINDOW (plug));
 179           g_object_unref (plug->modality_group);
 180           plug->modality_group = NULL;
 181         }
 182
 183       /* As a toplevel, the MAPPED flag doesn't correspond
 184        * to whether the widget->window is mapped; we unmap
 185        * here, but don't bother remapping -- we will get mapped
 186        * by gtk_widget_set_parent ().
 187        */
 188       if (GTK_WIDGET_MAPPED (plug))
 189         gtk_widget_unmap (GTK_WIDGET (plug));
 190
 191       GTK_WIDGET_UNSET_FLAGS (plug, GTK_TOPLEVEL);
 192       gtk_container_set_resize_mode (GTK_CONTAINER (plug), GTK_RESIZE_PARENT);
 193
 194       _gtk_widget_propagate_hierarchy_changed (GTK_WIDGET (plug), GTK_WIDGET (plug));
 195     }
 196   else
 197     {
 198       plug->modality_group = gtk_window_group_new ();
 199       gtk_window_group_add_window (plug->modality_group, GTK_WINDOW (plug));
 200
 201       GTK_WIDGET_SET_FLAGS (plug, GTK_TOPLEVEL);
 202       gtk_container_set_resize_mode (GTK_CONTAINER (plug), GTK_RESIZE_QUEUE);
 203
 204       _gtk_widget_propagate_hierarchy_changed (GTK_WIDGET (plug), NULL);
 205     }
 206 }
 207
 208 /**
 209  * _gtk_plug_add_to_socket:
 210  * @plug: a #GtkPlug
 211  * @socket: a #GtkSocket
 212  *
 213  * Adds a plug to a socket within the same application.
 214  **/
 215 void
 216 _gtk_plug_add_to_socket (GtkPlug   *plug,
 217                          GtkSocket *socket)
 218 {
 219   GtkWidget *widget;
 220
 221   g_return_if_fail (GTK_IS_PLUG (plug));
 222   g_return_if_fail (GTK_IS_SOCKET (socket));
 223   g_return_if_fail (GTK_WIDGET_REALIZED (socket));
 224
 225   widget = GTK_WIDGET (plug);
 226
 227   gtk_plug_set_is_child (plug, TRUE);
 228   plug->same_app = TRUE;
 229   socket->same_app = TRUE;
 230   socket->plug_widget = widget;
 231
 232   plug->socket_window = GTK_WIDGET (socket)->window;
 233
 234   if (GTK_WIDGET_REALIZED (widget))
 235     gdk_window_reparent (widget->window, plug->socket_window, 0, 0);
 236
 237   gtk_widget_set_parent (widget, GTK_WIDGET (socket));
 238
 239   g_signal_emit_by_name (G_OBJECT (socket), "plug_added", 0);
 240 }
 241
 242 /**
 243  * _gtk_plug_remove_from_socket:
 244  * @plug: a #GtkPlug
 245  * @socket: a #GtkSocket
 246  *
 247  * Removes a plug from a socket within the same application.
 248  **/
 249 void
 250 _gtk_plug_remove_from_socket (GtkPlug   *plug,
 251                               GtkSocket *socket)
 252 {
 253   GtkWidget *widget;
 254   GdkEvent event;
 255   gboolean result;
 256   gboolean widget_was_visible;
 257
 258   g_return_if_fail (GTK_IS_PLUG (plug));
 259   g_return_if_fail (GTK_IS_SOCKET (socket));
 260   g_return_if_fail (GTK_WIDGET_REALIZED (plug));
 261
 262   widget = GTK_WIDGET (plug);
 263
 264   g_object_ref (plug);
 265   g_object_ref (socket);
 266
 267   widget_was_visible = GTK_WIDGET_VISIBLE (plug);
 268
 269   gdk_window_hide (widget->window);
 270   gdk_window_reparent (widget->window, GDK_ROOT_PARENT (), 0, 0);
 271
 272   GTK_PRIVATE_SET_FLAG (plug, GTK_IN_REPARENT);
 273   gtk_widget_unparent (GTK_WIDGET (plug));
 274   GTK_PRIVATE_UNSET_FLAG (plug, GTK_IN_REPARENT);
 275
 276   socket->plug_widget = NULL;
 277   socket->plug_window = NULL;
 278   socket->same_app = FALSE;
 279
 280   plug->same_app = FALSE;
 281   plug->socket_window = NULL;
 282
 283   gtk_plug_set_is_child (plug, FALSE);
 284
 285   g_signal_emit_by_name (G_OBJECT (socket), "plug_removed", &result);
 286   if (!result)
 287     gtk_widget_destroy (GTK_WIDGET (socket));
 288
 289   event.any.type = GDK_DELETE;
 290   event.any.window = g_object_ref (widget->window);
 291   event.any.send_event = FALSE;
 292
 293   if (!gtk_widget_event (widget, &event))
 294     gtk_widget_destroy (widget);
 295
 296   g_object_unref (event.any.window);
 297   g_object_unref (plug);
 298
 299   if (widget_was_visible && GTK_WIDGET_VISIBLE (socket))
 300     gtk_widget_queue_resize (GTK_WIDGET (socket));
 301
 302   g_object_unref (socket);
 303 }
 304
 305 void
 306 gtk_plug_construct (GtkPlug         *plug,
 307                     GdkNativeWindow  socket_id)
 308 {
 309   if (socket_id)
 310     {
 311       gpointer user_data = NULL;
 312
 313       plug->socket_window = gdk_window_lookup (socket_id);
 314
 315       if (plug->socket_window)
 316         gdk_window_get_user_data (plug->socket_window, &user_data);
 317       else
 318         plug->socket_window = gdk_window_foreign_new (socket_id);
 319
 320       if (user_data)
 321         {
 322           if (GTK_IS_SOCKET (user_data))
 323             _gtk_plug_add_to_socket (plug, user_data);
 324           else
 325             {
 326               g_warning (G_STRLOC "Can't create GtkPlug as child of non-GtkSocket");
 327               plug->socket_window = NULL;
 328             }
 329         }
 330
 331       if (plug->socket_window)
 332         g_signal_emit (G_OBJECT (plug), plug_signals[EMBEDDED], 0);
 333     }
 334 }
 335
 336 GtkWidget*
 337 gtk_plug_new (GdkNativeWindow socket_id)
 338 {
 339   GtkPlug *plug;
 340
 341   plug = GTK_PLUG (gtk_type_new (GTK_TYPE_PLUG));
 342   gtk_plug_construct (plug, socket_id);
 343   return GTK_WIDGET (plug);
 344 }
 345
 346 /**
 347  * gtk_plug_get_id:
 348  * @plug: a #GtkPlug.
 349  *
 350  * Gets the window ID of a #GtkPlug widget, which can then
 351  * be used to embed this window inside another window, for
 352  * instance with gtk_socket_add_id().
 353  *
 354  * Return value: the window ID for the plug
 355  **/
 356 GdkNativeWindow
 357 gtk_plug_get_id (GtkPlug *plug)
 358 {
 359   g_return_val_if_fail (GTK_IS_PLUG (plug), 0);
 360
 361   if (!GTK_WIDGET_REALIZED (plug))
 362     gtk_widget_realize (GTK_WIDGET (plug));
 363
 364   return GDK_WINDOW_XWINDOW (GTK_WIDGET (plug)->window);
 365 }
 366
 367 static void
 368 gtk_plug_unrealize (GtkWidget *widget)
 369 {
 370   GtkPlug *plug;
 371
 372   g_return_if_fail (GTK_IS_PLUG (widget));
 373
 374   plug = GTK_PLUG (widget);
 375
 376   if (plug->socket_window != NULL)
 377     {
 378       gdk_window_set_user_data (plug->socket_window, NULL);
 379       gdk_window_unref (plug->socket_window);
 380       plug->socket_window = NULL;
 381     }
 382
 383   if (!plug->same_app)
 384     {
 385       if (plug->modality_window)
 386         handle_modality_off (plug);
 387
 388       gtk_window_group_remove_window (plug->modality_group, GTK_WINDOW (plug));
 389       g_object_unref (plug->modality_group);
 390     }
 391
 392   if (GTK_WIDGET_CLASS (parent_class)->unrealize)
 393     (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 394 }
 395
 396 static void
 397 gtk_plug_realize (GtkWidget *widget)
 398 {
 399   GtkWindow *window;
 400   GtkPlug *plug;
 401   GdkWindowAttr attributes;
 402   gint attributes_mask;
 403
 404   g_return_if_fail (GTK_IS_PLUG (widget));
 405
 406   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 407   window = GTK_WINDOW (widget);
 408   plug = GTK_PLUG (widget);
 409
 410   attributes.window_type = GDK_WINDOW_CHILD;    /* XXX GDK_WINDOW_PLUG ? */
 411   attributes.title = window->title;
 412   attributes.wmclass_name = window->wmclass_name;
 413   attributes.wmclass_class = window->wmclass_class;
 414   attributes.width = widget->allocation.width;
 415   attributes.height = widget->allocation.height;
 416   attributes.wclass = GDK_INPUT_OUTPUT;
 417
 418   /* this isn't right - we should match our parent's visual/colormap.
 419    * though that will require handling "foreign" colormaps */
 420   attributes.visual = gtk_widget_get_visual (widget);
 421   attributes.colormap = gtk_widget_get_colormap (widget);
 422   attributes.event_mask = gtk_widget_get_events (widget);
 423   attributes.event_mask |= (GDK_EXPOSURE_MASK |
 424                             GDK_KEY_PRESS_MASK |
 425                             GDK_KEY_RELEASE_MASK |
 426                             GDK_ENTER_NOTIFY_MASK |
 427                             GDK_LEAVE_NOTIFY_MASK |
 428                             GDK_FOCUS_CHANGE_MASK |
 429                             GDK_STRUCTURE_MASK);
 430
 431   attributes_mask = GDK_WA_VISUAL | GDK_WA_COLORMAP;
 432   attributes_mask |= (window->title ? GDK_WA_TITLE : 0);
 433   attributes_mask |= (window->wmclass_name ? GDK_WA_WMCLASS : 0);
 434
 435   if (GTK_WIDGET_TOPLEVEL (widget))
 436     {
 437       attributes.window_type = GDK_WINDOW_TOPLEVEL;
 438
 439       gdk_error_trap_push ();
 440       widget->window = gdk_window_new (plug->socket_window,
 441                                        &attributes, attributes_mask);
 442       gdk_flush ();
 443       if (gdk_error_trap_pop ()) /* Uh-oh */
 444         {
 445           gdk_error_trap_push ();
 446           gdk_window_destroy (widget->window);
 447           gdk_flush ();
 448           gdk_error_trap_pop ();
 449           widget->window = gdk_window_new (NULL, &attributes, attributes_mask);
 450         }
 451
 452       gdk_window_add_filter (widget->window, gtk_plug_filter_func, widget);
 453
 454       plug->modality_group = gtk_window_group_new ();
 455       gtk_window_group_add_window (plug->modality_group, window);
 456
 457       xembed_set_info (widget->window, 0);
 458     }
 459   else
 460     widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
 461
 462   gdk_window_set_user_data (widget->window, window);
 463
 464   widget->style = gtk_style_attach (widget->style, widget->window);
 465   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 466 }
 467
 468 static void
 469 gtk_plug_show (GtkWidget *widget)
 470 {
 471   if (GTK_WIDGET_TOPLEVEL (widget))
 472     GTK_WIDGET_CLASS (parent_class)->show (widget);
 473   else
 474     GTK_WIDGET_CLASS (bin_class)->show (widget);
 475 }
 476
 477 static void
 478 gtk_plug_hide (GtkWidget *widget)
 479 {
 480   if (GTK_WIDGET_TOPLEVEL (widget))
 481     GTK_WIDGET_CLASS (parent_class)->hide (widget);
 482   else
 483     GTK_WIDGET_CLASS (bin_class)->hide (widget);
 484 }
 485
 486 /* From gdkinternals.h */
 487 void gdk_synthesize_window_state (GdkWindow     *window,
 488                                   GdkWindowState unset_flags,
 489                                   GdkWindowState set_flags);
 490
 491 static void
 492 gtk_plug_map (GtkWidget *widget)
 493 {
 494   if (GTK_WIDGET_TOPLEVEL (widget))
 495     {
 496       GtkBin *bin = GTK_BIN (widget);
 497
 498       GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
 499
 500       if (bin->child &&
 501           GTK_WIDGET_VISIBLE (bin->child) &&
 502           !GTK_WIDGET_MAPPED (bin->child))
 503         gtk_widget_map (bin->child);
 504
 505       xembed_set_info (widget->window, XEMBED_MAPPED);
 506
 507       gdk_synthesize_window_state (widget->window,
 508                                    GDK_WINDOW_STATE_WITHDRAWN,
 509                                    0);
 510     }
 511   else
 512     GTK_WIDGET_CLASS (bin_class)->map (widget);
 513 }
 514
 515 static void
 516 gtk_plug_unmap (GtkWidget *widget)
 517 {
 518   if (GTK_WIDGET_TOPLEVEL (widget))
 519     {
 520       GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
 521
 522       gdk_window_hide (widget->window);
 523       xembed_set_info (widget->window, 0);
 524
 525       gdk_synthesize_window_state (widget->window,
 526                                    0,
 527                                    GDK_WINDOW_STATE_WITHDRAWN);
 528     }
 529   else
 530     GTK_WIDGET_CLASS (bin_class)->unmap (widget);
 531 }
 532
 533 static void
 534 gtk_plug_size_allocate (GtkWidget     *widget,
 535                         GtkAllocation *allocation)
 536 {
 537   if (GTK_WIDGET_TOPLEVEL (widget))
 538     GTK_WIDGET_CLASS (parent_class)->size_allocate (widget, allocation);
 539   else
 540     {
 541       GtkBin *bin = GTK_BIN (widget);
 542
 543       widget->allocation = *allocation;
 544
 545       if (GTK_WIDGET_REALIZED (widget))
 546         gdk_window_move_resize (widget->window,
 547                                 allocation->x, allocation->y,
 548                                 allocation->width, allocation->height);
 549
 550       if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 551         {
 552           GtkAllocation child_allocation;
 553
 554           child_allocation.x = child_allocation.y = GTK_CONTAINER (widget)->border_width;
 555           child_allocation.width =
 556             MAX (1, (gint)allocation->width - child_allocation.x * 2);
 557           child_allocation.height =
 558             MAX (1, (gint)allocation->height - child_allocation.y * 2);
 559
 560           gtk_widget_size_allocate (bin->child, &child_allocation);
 561         }
 562
 563     }
 564 }
 565
 566 static gboolean
 567 gtk_plug_key_press_event (GtkWidget   *widget,
 568                           GdkEventKey *event)
 569 {
 570   if (GTK_WIDGET_TOPLEVEL (widget))
 571     {
 572       if (!GTK_WINDOW (widget)->has_focus)
 573         {
 574           gtk_plug_forward_key_press (GTK_PLUG (widget), event);
 575           return TRUE;
 576         }
 577       else
 578         return GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, event);
 579     }
 580   else
 581     return FALSE;
 582 }
 583
 584 static void
 585 gtk_plug_forward_key_press (GtkPlug *plug, GdkEventKey *event)
 586 {
 587   XEvent xevent;
 588
 589   xevent.xkey.type = KeyPress;
 590   xevent.xkey.display = GDK_WINDOW_XDISPLAY (GTK_WIDGET(plug)->window);
 591   xevent.xkey.window = GDK_WINDOW_XWINDOW (plug->socket_window);
 592   xevent.xkey.root = GDK_ROOT_WINDOW (); /* FIXME */
 593   xevent.xkey.time = event->time;
 594   /* FIXME, the following might cause big problems for
 595    * non-GTK apps */
 596   xevent.xkey.x = 0;
 597   xevent.xkey.y = 0;
 598   xevent.xkey.x_root = 0;
 599   xevent.xkey.y_root = 0;
 600   xevent.xkey.state = event->state;
 601   xevent.xkey.keycode =  XKeysymToKeycode(GDK_DISPLAY(),
 602                                           event->keyval);
 603   xevent.xkey.same_screen = TRUE; /* FIXME ? */
 604
 605   gdk_error_trap_push ();
 606   XSendEvent (GDK_DISPLAY (),
 607               GDK_WINDOW_XWINDOW (plug->socket_window),
 608               False, NoEventMask, &xevent);
 609   gdk_flush ();
 610   gdk_error_trap_pop ();
 611 }
 612
 613 static void
 614 gtk_plug_set_focus (GtkWindow *window,
 615                     GtkWidget *focus)
 616 {
 617   GtkPlug *plug = GTK_PLUG (window);
 618
 619   GTK_WINDOW_CLASS (parent_class)->set_focus (window, focus);
 620
 621   /* Ask for focus from embedder
 622    */
 623
 624   if (focus && !window->has_focus)
 625     {
 626 #if 0
 627       XEvent xevent;
 628
 629       xevent.xfocus.type = FocusIn;
 630       xevent.xfocus.display = GDK_WINDOW_XDISPLAY (GTK_WIDGET(plug)->window);
 631       xevent.xfocus.window = GDK_WINDOW_XWINDOW (plug->socket_window);
 632       xevent.xfocus.mode = EMBEDDED_APP_WANTS_FOCUS;
 633       xevent.xfocus.detail = FALSE; /* Don't force */
 634
 635       gdk_error_trap_push ();
 636       XSendEvent (GDK_DISPLAY (),
 637                   GDK_WINDOW_XWINDOW (plug->socket_window),
 638                   False, NoEventMask, &xevent);
 639       gdk_flush ();
 640       gdk_error_trap_pop ();
 641 #endif
 642
 643       send_xembed_message (plug, XEMBED_REQUEST_FOCUS, 0, 0, 0,
 644                            gtk_get_current_event_time ());
 645     }
 646 }
 647
 648 #if 0
 649
 650 typedef struct
 651 {
 652   guint                  accelerator_key;
 653   GdkModifierType        accelerator_mods;
 654 } GrabbedKey;
 655
 656 static guint
 657 grabbed_key_hash (gconstpointer a)
 658 {
 659   const GrabbedKey *key = a;
 660   guint h;
 661
 662   h = key->accelerator_key << 16;
 663   h ^= key->accelerator_key >> 16;
 664   h ^= key->accelerator_mods;
 665
 666   return h;
 667 }
 668
 669 static gboolean
 670 grabbed_key_equal (gconstpointer a, gconstpointer b)
 671 {
 672   const GrabbedKey *keya = a;
 673   const GrabbedKey *keyb = b;
 674
 675   return (keya->accelerator_key == keyb->accelerator_key &&
 676           keya->accelerator_mods == keyb->accelerator_mods);
 677 }
 678
 679 static void
 680 add_grabbed_keys (gpointer key, gpointer val, gpointer data)
 681 {
 682   GrabbedKey *grabbed_key = key;
 683   GtkPlug *plug = data;
 684
 685   if (!plug->grabbed_keys ||
 686       !g_hash_table_lookup (plug->grabbed_keys, grabbed_key))
 687     {
 688       send_xembed_message (plug, XEMBED_GRAB_KEY, 0,
 689                            grabbed_key->accelerator_key, grabbed_key->accelerator_mods,
 690                            gtk_get_current_event_time ());
 691     }
 692 }
 693
 694 static void
 695 remove_grabbed_keys (gpointer key, gpointer val, gpointer data)
 696 {
 697   GrabbedKey *grabbed_key = key;
 698   GtkPlug *plug = data;
 699
 700   if (!plug->grabbed_keys ||
 701       !g_hash_table_lookup (plug->grabbed_keys, grabbed_key))
 702     {
 703       send_xembed_message (plug, XEMBED_UNGRAB_KEY, 0,
 704                            grabbed_key->accelerator_key, grabbed_key->accelerator_mods,
 705                            gtk_get_current_event_time ());
 706     }
 707 }
 708
 709 static void
 710 gtk_plug_free_grabbed_keys (GHashTable *key_table)
 711 {
 712   g_hash_table_foreach (key_table, (GHFunc)g_free, NULL);
 713   g_hash_table_destroy (key_table);
 714 }
 715
 716 static void
 717 gtk_plug_accel_entries_changed (GtkWindow *window)
 718 {
 719   GHashTable *new_grabbed_keys, *old_grabbed_keys;
 720   GSList *accel_groups, *tmp_list;
 721   GtkPlug *plug = GTK_PLUG (window);
 722
 723   new_grabbed_keys = g_hash_table_new (grabbed_key_hash, grabbed_key_equal);
 724
 725   accel_groups = gtk_accel_groups_from_object (G_OBJECT (window));
 726
 727   tmp_list = accel_groups;
 728
 729   while (tmp_list)
 730     {
 731       GtkAccelGroup *accel_group = tmp_list->data;
 732       gint i, n_entries;
 733       GtkAccelEntry *entries;
 734
 735       gtk_accel_group_get_entries (accel_group, &entries, &n_entries);
 736
 737       for (i = 0; i < n_entries; i++)
 738         {
 739           GdkKeymapKey *keys;
 740           gint n_keys;
 741
 742           if (gdk_keymap_get_entries_for_keyval (NULL, entries[i].accelerator_key, &keys, &n_keys))
 743             {
 744               GrabbedKey *key = g_new (GrabbedKey, 1);
 745
 746               key->accelerator_key = keys[0].keycode;
 747               key->accelerator_mods = entries[i].accelerator_mods;
 748
 749               g_hash_table_insert (new_grabbed_keys, key, key);
 750
 751               g_free (keys);
 752             }
 753         }
 754
 755       tmp_list = tmp_list->next;
 756     }
 757
 758   g_hash_table_foreach (new_grabbed_keys, add_grabbed_keys, plug);
 759
 760   old_grabbed_keys = plug->grabbed_keys;
 761   plug->grabbed_keys = new_grabbed_keys;
 762
 763   if (old_grabbed_keys)
 764     {
 765       g_hash_table_foreach (old_grabbed_keys, remove_grabbed_keys, plug);
 766       gtk_plug_free_grabbed_keys (old_grabbed_keys);
 767     }
 768
 769 }
 770 #endif
 771
 772 static gboolean
 773 gtk_plug_focus (GtkWidget        *widget,
 774                 GtkDirectionType  direction)
 775 {
 776   GtkBin *bin = GTK_BIN (widget);
 777   GtkPlug *plug = GTK_PLUG (widget);
 778   GtkWindow *window = GTK_WINDOW (widget);
 779   GtkContainer *container = GTK_CONTAINER (widget);
 780   GtkWidget *old_focus_child = container->focus_child;
 781   GtkWidget *parent;
 782
 783   /* We override GtkWindow's behavior, since we don't want wrapping here.
 784    */
 785   if (old_focus_child)
 786     {
 787       if (gtk_widget_child_focus (old_focus_child, direction))
 788         return TRUE;
 789
 790       if (window->focus_widget)
 791         {
 792           /* Wrapped off the end, clear the focus setting for the toplevel */
 793           parent = window->focus_widget->parent;
 794           while (parent)
 795             {
 796               gtk_container_set_focus_child (GTK_CONTAINER (parent), NULL);
 797               parent = GTK_WIDGET (parent)->parent;
 798             }
 799
 800           gtk_window_set_focus (GTK_WINDOW (container), NULL);
 801
 802           if (!GTK_CONTAINER (window)->focus_child)
 803             {
 804               gint message = -1;
 805
 806               switch (direction)
 807                 {
 808                 case GTK_DIR_UP:
 809                 case GTK_DIR_LEFT:
 810                 case GTK_DIR_TAB_BACKWARD:
 811                   message = XEMBED_FOCUS_PREV;
 812                   break;
 813                 case GTK_DIR_DOWN:
 814                 case GTK_DIR_RIGHT:
 815                 case GTK_DIR_TAB_FORWARD:
 816                   message = XEMBED_FOCUS_NEXT;
 817                   break;
 818                 }
 819
 820               send_xembed_message (plug, message, 0, 0, 0,
 821                                    gtk_get_current_event_time ());
 822
 823 #if 0
 824               gtk_window_set_focus (GTK_WINDOW (widget), NULL);
 825
 826               gdk_error_trap_push ();
 827               XSetInputFocus (GDK_DISPLAY (),
 828                               GDK_WINDOW_XWINDOW (plug->socket_window),
 829                               RevertToParent, event->time);
 830               gdk_flush ();
 831               gdk_error_trap_pop ();
 832
 833               gtk_plug_forward_key_press (plug, event);
 834 #endif
 835             }
 836         }
 837
 838       return FALSE;
 839     }
 840   else
 841     {
 842       /* Try to focus the first widget in the window */
 843
 844       if (bin->child && gtk_widget_child_focus (bin->child, direction))
 845         return TRUE;
 846     }
 847
 848   return FALSE;
 849 }
 850
 851 static void
 852 gtk_plug_check_resize (GtkContainer *container)
 853 {
 854   if (GTK_WIDGET_TOPLEVEL (container))
 855     GTK_CONTAINER_CLASS (parent_class)->check_resize (container);
 856   else
 857     GTK_CONTAINER_CLASS (bin_class)->check_resize (container);
 858 }
 859
 860 static void
 861 send_xembed_message (GtkPlug *plug,
 862                      glong      message,
 863                      glong      detail,
 864                      glong      data1,
 865                      glong      data2,
 866                      guint32    time)
 867 {
 868   if (plug->socket_window)
 869     {
 870       XEvent xevent;
 871
 872       xevent.xclient.window = GDK_WINDOW_XWINDOW (plug->socket_window);
 873       xevent.xclient.type = ClientMessage;
 874       xevent.xclient.message_type = gdk_x11_get_xatom_by_name ("_XEMBED");
 875       xevent.xclient.format = 32;
 876       xevent.xclient.data.l[0] = time;
 877       xevent.xclient.data.l[1] = message;
 878       xevent.xclient.data.l[2] = detail;
 879       xevent.xclient.data.l[3] = data1;
 880       xevent.xclient.data.l[4] = data2;
 881
 882       gdk_error_trap_push ();
 883       XSendEvent (GDK_DISPLAY (),
 884                   GDK_WINDOW_XWINDOW (plug->socket_window),
 885                   False, NoEventMask, &xevent);
 886       gdk_flush ();
 887       gdk_error_trap_pop ();
 888     }
 889 }
 890
 891 static void
 892 focus_first_last (GtkPlug          *plug,
 893                   GtkDirectionType  direction)
 894 {
 895   GtkWindow *window = GTK_WINDOW (plug);
 896   GtkWidget *parent;
 897
 898   if (window->focus_widget)
 899     {
 900       parent = window->focus_widget->parent;
 901       while (parent)
 902         {
 903           gtk_container_set_focus_child (GTK_CONTAINER (parent), NULL);
 904           parent = GTK_WIDGET (parent)->parent;
 905         }
 906
 907       gtk_window_set_focus (GTK_WINDOW (plug), NULL);
 908     }
 909
 910   gtk_widget_child_focus (GTK_WIDGET (plug), direction);
 911 }
 912
 913 static void
 914 handle_modality_on (GtkPlug *plug)
 915 {
 916   if (!plug->modality_window)
 917     {
 918       plug->modality_window = gtk_window_new (GTK_WINDOW_POPUP);
 919       gtk_widget_realize (plug->modality_window);
 920       gtk_window_group_add_window (plug->modality_group, GTK_WINDOW (plug->modality_window));
 921       gtk_grab_add (plug->modality_window);
 922     }
 923 }
 924
 925 static void
 926 handle_modality_off (GtkPlug *plug)
 927 {
 928   if (plug->modality_window)
 929     {
 930       gtk_widget_destroy (plug->modality_window);
 931       plug->modality_window = NULL;
 932     }
 933 }
 934
 935 static void
 936 xembed_set_info (GdkWindow     *gdk_window,
 937                  unsigned long  flags)
 938 {
 939   Display *display = GDK_WINDOW_XDISPLAY (gdk_window);
 940   Window window = GDK_WINDOW_XWINDOW (gdk_window);
 941   unsigned long buffer[2];
 942
 943   Atom xembed_info_atom = gdk_x11_get_xatom_by_name ("_XEMBED_INFO");
 944
 945   buffer[1] = 0;                /* Protocol version */
 946   buffer[1] = flags;
 947
 948   XChangeProperty (display, window,
 949                    xembed_info_atom, xembed_info_atom, 32,
 950                    PropModeReplace,
 951                    (unsigned char *)buffer, 2);
 952 }
 953
 954 static void
 955 handle_xembed_message (GtkPlug   *plug,
 956                        glong      message,
 957                        glong      detail,
 958                        glong      data1,
 959                        glong      data2,
 960                        guint32    time)
 961 {
 962   GTK_NOTE (PLUGSOCKET,
 963             g_message ("Message of type %ld received", message));
 964
 965   switch (message)
 966     {
 967     case XEMBED_EMBEDDED_NOTIFY:
 968       break;
 969     case XEMBED_WINDOW_ACTIVATE:
 970       GTK_NOTE(PLUGSOCKET,
 971                g_message ("GtkPlug: ACTIVATE received"));
 972       break;
 973     case XEMBED_WINDOW_DEACTIVATE:
 974       GTK_NOTE(PLUGSOCKET,
 975                g_message ("GtkPlug: DEACTIVATE received"));
 976       break;
 977
 978     case XEMBED_MODALITY_ON:
 979       handle_modality_on (plug);
 980       break;
 981     case XEMBED_MODALITY_OFF:
 982       handle_modality_off (plug);
 983       break;
 984
 985     case XEMBED_FOCUS_IN:
 986       switch (detail)
 987         {
 988         case XEMBED_FOCUS_FIRST:
 989           focus_first_last (plug, GTK_DIR_TAB_FORWARD);
 990           break;
 991         case XEMBED_FOCUS_LAST:
 992           focus_first_last (plug, GTK_DIR_TAB_BACKWARD);
 993           break;
 994         case XEMBED_FOCUS_CURRENT:
 995           /* fall through */;
 996         }
 997
 998     case XEMBED_FOCUS_OUT:
 999       {
1000         GdkEvent event;
1001
1002         event.focus_change.type = GDK_FOCUS_CHANGE;
1003         event.focus_change.window = GTK_WIDGET (plug)->window;
1004         event.focus_change.send_event = TRUE;
1005         event.focus_change.in = (message == XEMBED_FOCUS_IN);
1006
1007         gtk_widget_event (GTK_WIDGET (plug), &event);
1008
1009         break;
1010       }
1011
1012     case XEMBED_REQUEST_FOCUS:
1013     case XEMBED_FOCUS_NEXT:
1014     case XEMBED_FOCUS_PREV:
1015     case XEMBED_GRAB_KEY:
1016     case XEMBED_UNGRAB_KEY:
1017       g_warning ("GtkPlug: Invalid _XEMBED message of type %ld received", message);
1018       break;
1019
1020     default:
1021       GTK_NOTE(PLUGSOCKET,
1022                g_message ("GtkPlug: Ignoring unknown _XEMBED message of type %ld", message));
1023       break;
1024     }
1025 }
1026
1027 static GdkFilterReturn
1028 gtk_plug_filter_func (GdkXEvent *gdk_xevent, GdkEvent *event, gpointer data)
1029 {
1030   GtkPlug *plug = GTK_PLUG (data);
1031   XEvent *xevent = (XEvent *)gdk_xevent;
1032
1033   GdkFilterReturn return_val;
1034
1035   return_val = GDK_FILTER_CONTINUE;
1036
1037   switch (xevent->type)
1038     {
1039     case ClientMessage:
1040       if (xevent->xclient.message_type == gdk_x11_get_xatom_by_name ("_XEMBED"))
1041         {
1042           handle_xembed_message (plug,
1043                                  xevent->xclient.data.l[1],
1044                                  xevent->xclient.data.l[2],
1045                                  xevent->xclient.data.l[3],
1046                                  xevent->xclient.data.l[4],
1047                                  xevent->xclient.data.l[0]);
1048
1049
1050           return GDK_FILTER_REMOVE;
1051         }
1052       else if (xevent->xclient.message_type == gdk_x11_get_xatom_by_name ("WM_DELETE_WINDOW"))
1053         {
1054           /* We filter these out because we take being reparented back to the
1055            * root window as the reliable end of the embedding protocol
1056            */
1057
1058           return GDK_FILTER_REMOVE;
1059         }
1060       break;
1061     case ReparentNotify:
1062       {
1063         XReparentEvent *xre = &xevent->xreparent;
1064         gboolean was_embedded = plug->socket_window != NULL;
1065
1066         return_val = GDK_FILTER_REMOVE;
1067
1068         g_object_ref (plug);
1069
1070         if (was_embedded)
1071           {
1072             /* End of embedding protocol for previous socket */
1073
1074             /* FIXME: race if we remove from another socket and
1075              * then add to a local window before we get notification
1076              * Probably need check in _gtk_plug_add_to_socket
1077              */
1078
1079             if (xre->parent != GDK_WINDOW_XWINDOW (plug->socket_window))
1080               {
1081                 GtkWidget *widget = GTK_WIDGET (plug);
1082
1083                 gdk_window_set_user_data (plug->socket_window, NULL);
1084                 gdk_window_unref (plug->socket_window);
1085                 plug->socket_window = NULL;
1086
1087                 /* Emit a delete window, as if the user attempted
1088                  * to close the toplevel. Simple as to how we
1089                  * handle WM_DELETE_WINDOW, if it isn't handled
1090                  * we destroy the widget. BUt only do this if
1091                  * we are being reparented to the root window.
1092                  * Moving from one embedder to another should
1093                  * be invisible to the app.
1094                  */
1095
1096                 if (xre->parent == GDK_ROOT_WINDOW())
1097                   {
1098                     GdkEvent event;
1099
1100                     event.any.type = GDK_DELETE;
1101                     event.any.window = g_object_ref (widget->window);
1102                     event.any.send_event = FALSE;
1103
1104                     if (!gtk_widget_event (widget, &event))
1105                       gtk_widget_destroy (widget);
1106
1107                     g_object_unref (event.any.window);
1108                   }
1109               }
1110             else
1111               break;
1112           }
1113
1114         if (xre->parent != GDK_ROOT_WINDOW ())
1115           {
1116             /* Start of embedding protocol */
1117
1118             plug->socket_window = gdk_window_lookup (xre->parent);
1119             if (plug->socket_window)
1120               {
1121                 gpointer user_data = NULL;
1122                 gdk_window_get_user_data (plug->socket_window, &user_data);
1123
1124                 if (user_data)
1125                   {
1126                     g_warning (G_STRLOC "Plug reparented unexpectedly into window in the same process");
1127                     plug->socket_window = NULL;
1128                     break;
1129                   }
1130
1131                 g_object_ref (plug->socket_window);
1132               }
1133             else
1134               {
1135                 plug->socket_window = gdk_window_foreign_new (xre->parent);
1136                 if (!plug->socket_window) /* Already gone */
1137                   break;
1138               }
1139
1140             /* FIXME: Add grabbed keys here */
1141
1142             if (!was_embedded)
1143               g_signal_emit (G_OBJECT (plug), plug_signals[EMBEDDED], 0);
1144           }
1145
1146         g_object_unref (plug);
1147
1148         break;
1149       }
1150     }
1151
1152   return GDK_FILTER_CONTINUE;
1153 }