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