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