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_finalize              (GObject          *object);
  41 static void            gtk_plug_realize               (GtkWidget        *widget);
  42 static void            gtk_plug_unrealize             (GtkWidget        *widget);
  43 static void            gtk_plug_show                  (GtkWidget        *widget);
  44 static void            gtk_plug_hide                  (GtkWidget        *widget);
  45 static void            gtk_plug_map                   (GtkWidget        *widget);
  46 static void            gtk_plug_unmap                 (GtkWidget        *widget);
  47 static void            gtk_plug_size_allocate         (GtkWidget        *widget,
  48                                                        GtkAllocation    *allocation);
  49 static gboolean        gtk_plug_key_press_event       (GtkWidget        *widget,
  50                                                        GdkEventKey      *event);
  51 static gboolean        gtk_plug_focus_event           (GtkWidget        *widget,
  52                                                        GdkEventFocus    *event);
  53 static void            gtk_plug_set_focus             (GtkWindow        *window,
  54                                                        GtkWidget        *focus);
  55 static gboolean        gtk_plug_focus                 (GtkWidget        *widget,
  56                                                        GtkDirectionType  direction);
  57 static void            gtk_plug_check_resize          (GtkContainer     *container);
  58 static void            gtk_plug_keys_changed          (GtkWindow        *window);
  59 static GdkFilterReturn gtk_plug_filter_func           (GdkXEvent        *gdk_xevent,
  60                                                        GdkEvent         *event,
  61                                                        gpointer          data);
  62
  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 GType
  87 gtk_plug_get_type ()
  88 {
  89   static GType 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",
 107                                           &plug_info, 0);
 108     }
 109
 110   return plug_type;
 111 }
 112
 113 static void
 114 gtk_plug_class_init (GtkPlugClass *class)
 115 {
 116   GObjectClass *gobject_class = (GObjectClass *)class;
 117   GtkWidgetClass *widget_class = (GtkWidgetClass *)class;
 118   GtkWindowClass *window_class = (GtkWindowClass *)class;
 119   GtkContainerClass *container_class = (GtkContainerClass *)class;
 120
 121   parent_class = g_type_class_peek_parent (class);
 122   bin_class = g_type_class_peek (GTK_TYPE_BIN);
 123
 124   gobject_class->finalize = gtk_plug_finalize;
 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   widget_class->focus_in_event = gtk_plug_focus_event;
 130   widget_class->focus_out_event = gtk_plug_focus_event;
 131
 132   widget_class->show = gtk_plug_show;
 133   widget_class->hide = gtk_plug_hide;
 134   widget_class->map = gtk_plug_map;
 135   widget_class->unmap = gtk_plug_unmap;
 136   widget_class->size_allocate = gtk_plug_size_allocate;
 137
 138   widget_class->focus = gtk_plug_focus;
 139
 140   container_class->check_resize = gtk_plug_check_resize;
 141
 142   window_class->set_focus = gtk_plug_set_focus;
 143   window_class->keys_changed = gtk_plug_keys_changed;
 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                   G_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       if (GTK_WINDOW (plug)->focus_widget)
 199         gtk_window_set_focus (GTK_WINDOW (plug), NULL);
 200       if (GTK_WINDOW (plug)->default_widget)
 201         gtk_window_set_default (GTK_WINDOW (plug), NULL);
 202
 203       plug->modality_group = gtk_window_group_new ();
 204       gtk_window_group_add_window (plug->modality_group, GTK_WINDOW (plug));
 205
 206       GTK_WIDGET_SET_FLAGS (plug, GTK_TOPLEVEL);
 207       gtk_container_set_resize_mode (GTK_CONTAINER (plug), GTK_RESIZE_QUEUE);
 208
 209       _gtk_widget_propagate_hierarchy_changed (GTK_WIDGET (plug), NULL);
 210     }
 211 }
 212
 213 /**
 214  * _gtk_plug_add_to_socket:
 215  * @plug: a #GtkPlug
 216  * @socket_: a #GtkSocket
 217  *
 218  * Adds a plug to a socket within the same application.
 219  **/
 220 void
 221 _gtk_plug_add_to_socket (GtkPlug   *plug,
 222                          GtkSocket *socket)
 223 {
 224   GtkWidget *widget;
 225   gint w, h;
 226
 227   g_return_if_fail (GTK_IS_PLUG (plug));
 228   g_return_if_fail (GTK_IS_SOCKET (socket));
 229   g_return_if_fail (GTK_WIDGET_REALIZED (socket));
 230
 231   widget = GTK_WIDGET (plug);
 232
 233   gtk_plug_set_is_child (plug, TRUE);
 234   plug->same_app = TRUE;
 235   socket->same_app = TRUE;
 236   socket->plug_widget = widget;
 237
 238   plug->socket_window = GTK_WIDGET (socket)->window;
 239
 240   if (GTK_WIDGET_REALIZED (widget))
 241     {
 242       gdk_drawable_get_size (GDK_DRAWABLE (widget->window), &w, &h);
 243       gdk_window_reparent (widget->window, plug->socket_window, -w, -h);
 244     }
 245
 246   gtk_widget_set_parent (widget, GTK_WIDGET (socket));
 247
 248   g_signal_emit_by_name (socket, "plug_added", 0);
 249 }
 250
 251 static void
 252 send_delete_event (GtkWidget *widget)
 253 {
 254   GdkEvent *event = gdk_event_new (GDK_DELETE);
 255
 256   event->any.window = g_object_ref (widget->window);
 257   event->any.send_event = FALSE;
 258
 259   gtk_widget_ref (widget);
 260
 261   if (!gtk_widget_event (widget, event))
 262     gtk_widget_destroy (widget);
 263
 264   gtk_widget_unref (widget);
 265
 266   gdk_event_free (event);
 267 }
 268
 269 /**
 270  * _gtk_plug_remove_from_socket:
 271  * @plug: a #GtkPlug
 272  * @socket_: a #GtkSocket
 273  *
 274  * Removes a plug from a socket within the same application.
 275  **/
 276 void
 277 _gtk_plug_remove_from_socket (GtkPlug   *plug,
 278                               GtkSocket *socket)
 279 {
 280   GtkWidget *widget;
 281   gboolean result;
 282   gboolean widget_was_visible;
 283
 284   g_return_if_fail (GTK_IS_PLUG (plug));
 285   g_return_if_fail (GTK_IS_SOCKET (socket));
 286   g_return_if_fail (GTK_WIDGET_REALIZED (plug));
 287
 288   widget = GTK_WIDGET (plug);
 289
 290   g_object_ref (plug);
 291   g_object_ref (socket);
 292
 293   widget_was_visible = GTK_WIDGET_VISIBLE (plug);
 294
 295   gdk_window_hide (widget->window);
 296   gdk_window_reparent (widget->window,
 297                        gtk_widget_get_root_window (widget),
 298                        0, 0);
 299
 300   GTK_PRIVATE_SET_FLAG (plug, GTK_IN_REPARENT);
 301   gtk_widget_unparent (GTK_WIDGET (plug));
 302   GTK_PRIVATE_UNSET_FLAG (plug, GTK_IN_REPARENT);
 303
 304   socket->plug_widget = NULL;
 305   g_object_unref (socket->plug_window);
 306   socket->plug_window = NULL;
 307
 308   socket->same_app = FALSE;
 309
 310   plug->same_app = FALSE;
 311   plug->socket_window = NULL;
 312
 313   gtk_plug_set_is_child (plug, FALSE);
 314
 315   g_signal_emit_by_name (socket, "plug_removed", &result);
 316   if (!result)
 317     gtk_widget_destroy (GTK_WIDGET (socket));
 318
 319   send_delete_event (widget);
 320
 321   g_object_unref (plug);
 322
 323   if (widget_was_visible && GTK_WIDGET_VISIBLE (socket))
 324     gtk_widget_queue_resize (GTK_WIDGET (socket));
 325
 326   g_object_unref (socket);
 327 }
 328
 329 /**
 330  * gtk_plug_construct:
 331  * @plug: a #GtkPlug.
 332  * @socket_id: the XID of the socket's window.
 333  *
 334  * Finish the initialization of @plug for a given #GtkSocket identified by
 335  * @socket_id. This function will generally only be used by classes deriving from #GtkPlug.
 336  **/
 337 void
 338 gtk_plug_construct (GtkPlug         *plug,
 339                     GdkNativeWindow  socket_id)
 340 {
 341   gtk_plug_construct_for_display (plug, gdk_display_get_default (), socket_id);
 342 }
 343
 344 /**
 345  * gtk_plug_construct_for_display:
 346  * @plug: a #GtkPlug.
 347  * @display: the #GdkDisplay associated with @socket_id's
 348  *           #GtkSocket.
 349  * @socket_id: the XID of the socket's window.
 350  *
 351  * Finish the initialization of @plug for a given #GtkSocket identified by
 352  * @socket_id which is currently displayed on @display.
 353  * This function will generally only be used by classes deriving from #GtkPlug.
 354  **/
 355 void
 356 gtk_plug_construct_for_display (GtkPlug         *plug,
 357                                 GdkDisplay      *display,
 358                                 GdkNativeWindow  socket_id)
 359 {
 360   if (socket_id)
 361     {
 362       gpointer user_data = NULL;
 363
 364       plug->socket_window = gdk_window_lookup_for_display (display, socket_id);
 365
 366       if (plug->socket_window)
 367         gdk_window_get_user_data (plug->socket_window, &user_data);
 368       else
 369         plug->socket_window = gdk_window_foreign_new_for_display (display, socket_id);
 370
 371       if (user_data)
 372         {
 373           if (GTK_IS_SOCKET (user_data))
 374             _gtk_plug_add_to_socket (plug, user_data);
 375           else
 376             {
 377               g_warning (G_STRLOC "Can't create GtkPlug as child of non-GtkSocket");
 378               plug->socket_window = NULL;
 379             }
 380         }
 381
 382       if (plug->socket_window)
 383         g_signal_emit (plug, plug_signals[EMBEDDED], 0);
 384     }
 385 }
 386
 387 /**
 388  * gtk_plug_new:
 389  * @socket_id:  the window ID of the socket, or 0.
 390  *
 391  * Creates a new plug widget inside the #GtkSocket identified
 392  * by @socket_id. If @socket_id is 0, the plug is left "unplugged" and
 393  * can later be plugged into a #GtkSocket by  gtk_socket_add_id().
 394  *
 395  * Return value: the new #GtkPlug widget.
 396  **/
 397 GtkWidget*
 398 gtk_plug_new (GdkNativeWindow socket_id)
 399 {
 400   return gtk_plug_new_for_display (gdk_display_get_default (), socket_id);
 401 }
 402
 403 /**
 404  * gtk_plug_new_for_display:
 405  * @display : the #GdkDisplay on which @socket_id is displayed
 406  * @socket_id: the XID of the socket's window.
 407  *
 408  * Create a new plug widget inside the #GtkSocket identified by socket_id.
 409  *
 410  * Return value: the new #GtkPlug widget.
 411  */
 412 GtkWidget*
 413 gtk_plug_new_for_display (GdkDisplay      *display,
 414                           GdkNativeWindow  socket_id)
 415 {
 416   GtkPlug *plug;
 417
 418   plug = g_object_new (GTK_TYPE_PLUG, NULL);
 419   gtk_plug_construct_for_display (plug, display, socket_id);
 420   return GTK_WIDGET (plug);
 421 }
 422
 423 /**
 424  * gtk_plug_get_id:
 425  * @plug: a #GtkPlug.
 426  *
 427  * Gets the window ID of a #GtkPlug widget, which can then
 428  * be used to embed this window inside another window, for
 429  * instance with gtk_socket_add_id().
 430  *
 431  * Return value: the window ID for the plug
 432  **/
 433 GdkNativeWindow
 434 gtk_plug_get_id (GtkPlug *plug)
 435 {
 436   g_return_val_if_fail (GTK_IS_PLUG (plug), 0);
 437
 438   if (!GTK_WIDGET_REALIZED (plug))
 439     gtk_widget_realize (GTK_WIDGET (plug));
 440
 441   return GDK_WINDOW_XWINDOW (GTK_WIDGET (plug)->window);
 442 }
 443
 444 static void
 445 gtk_plug_finalize (GObject *object)
 446 {
 447   GtkPlug *plug = GTK_PLUG (object);
 448
 449   if (plug->grabbed_keys)
 450     {
 451       g_hash_table_destroy (plug->grabbed_keys);
 452       plug->grabbed_keys = NULL;
 453     }
 454
 455   G_OBJECT_CLASS (parent_class)->finalize (object);
 456 }
 457
 458 static void
 459 gtk_plug_unrealize (GtkWidget *widget)
 460 {
 461   GtkPlug *plug;
 462
 463   g_return_if_fail (GTK_IS_PLUG (widget));
 464
 465   plug = GTK_PLUG (widget);
 466
 467   if (plug->socket_window != NULL)
 468     {
 469       gdk_window_set_user_data (plug->socket_window, NULL);
 470       g_object_unref (plug->socket_window);
 471       plug->socket_window = NULL;
 472     }
 473
 474   if (!plug->same_app)
 475     {
 476       if (plug->modality_window)
 477         handle_modality_off (plug);
 478
 479       gtk_window_group_remove_window (plug->modality_group, GTK_WINDOW (plug));
 480       g_object_unref (plug->modality_group);
 481     }
 482
 483   if (GTK_WIDGET_CLASS (parent_class)->unrealize)
 484     (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 485 }
 486
 487 static void
 488 gtk_plug_realize (GtkWidget *widget)
 489 {
 490   GtkWindow *window;
 491   GtkPlug *plug;
 492   GdkWindowAttr attributes;
 493   gint attributes_mask;
 494
 495   g_return_if_fail (GTK_IS_PLUG (widget));
 496
 497   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 498   window = GTK_WINDOW (widget);
 499   plug = GTK_PLUG (widget);
 500
 501   attributes.window_type = GDK_WINDOW_CHILD;    /* XXX GDK_WINDOW_PLUG ? */
 502   attributes.title = window->title;
 503   attributes.wmclass_name = window->wmclass_name;
 504   attributes.wmclass_class = window->wmclass_class;
 505   attributes.width = widget->allocation.width;
 506   attributes.height = widget->allocation.height;
 507   attributes.wclass = GDK_INPUT_OUTPUT;
 508
 509   /* this isn't right - we should match our parent's visual/colormap.
 510    * though that will require handling "foreign" colormaps */
 511   attributes.visual = gtk_widget_get_visual (widget);
 512   attributes.colormap = gtk_widget_get_colormap (widget);
 513   attributes.event_mask = gtk_widget_get_events (widget);
 514   attributes.event_mask |= (GDK_EXPOSURE_MASK |
 515                             GDK_KEY_PRESS_MASK |
 516                             GDK_KEY_RELEASE_MASK |
 517                             GDK_ENTER_NOTIFY_MASK |
 518                             GDK_LEAVE_NOTIFY_MASK |
 519                             GDK_STRUCTURE_MASK);
 520
 521   attributes_mask = GDK_WA_VISUAL | GDK_WA_COLORMAP;
 522   attributes_mask |= (window->title ? GDK_WA_TITLE : 0);
 523   attributes_mask |= (window->wmclass_name ? GDK_WA_WMCLASS : 0);
 524
 525   if (GTK_WIDGET_TOPLEVEL (widget))
 526     {
 527       attributes.window_type = GDK_WINDOW_TOPLEVEL;
 528
 529       gdk_error_trap_push ();
 530       if (plug->socket_window)
 531         widget->window = gdk_window_new (plug->socket_window,
 532                                          &attributes, attributes_mask);
 533       else /* If it's a passive plug, we use the root window */
 534         widget->window = gdk_window_new (gtk_widget_get_root_window (widget),
 535                                          &attributes, attributes_mask);
 536
 537       gdk_display_sync (gtk_widget_get_display (widget));
 538       if (gdk_error_trap_pop ()) /* Uh-oh */
 539         {
 540           gdk_error_trap_push ();
 541           gdk_window_destroy (widget->window);
 542           gdk_flush ();
 543           gdk_error_trap_pop ();
 544           widget->window = gdk_window_new (gtk_widget_get_root_window (widget),
 545                                            &attributes, attributes_mask);
 546         }
 547
 548       gdk_window_add_filter (widget->window, gtk_plug_filter_func, widget);
 549
 550       plug->modality_group = gtk_window_group_new ();
 551       gtk_window_group_add_window (plug->modality_group, window);
 552
 553       xembed_set_info (widget->window, 0);
 554     }
 555   else
 556     widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
 557                                      &attributes, attributes_mask);
 558
 559   gdk_window_set_user_data (widget->window, window);
 560
 561   widget->style = gtk_style_attach (widget->style, widget->window);
 562   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 563 }
 564
 565 static void
 566 gtk_plug_show (GtkWidget *widget)
 567 {
 568   if (GTK_WIDGET_TOPLEVEL (widget))
 569     GTK_WIDGET_CLASS (parent_class)->show (widget);
 570   else
 571     GTK_WIDGET_CLASS (bin_class)->show (widget);
 572 }
 573
 574 static void
 575 gtk_plug_hide (GtkWidget *widget)
 576 {
 577   if (GTK_WIDGET_TOPLEVEL (widget))
 578     GTK_WIDGET_CLASS (parent_class)->hide (widget);
 579   else
 580     GTK_WIDGET_CLASS (bin_class)->hide (widget);
 581 }
 582
 583 /* From gdkinternals.h */
 584 void gdk_synthesize_window_state (GdkWindow     *window,
 585                                   GdkWindowState unset_flags,
 586                                   GdkWindowState set_flags);
 587
 588 static void
 589 gtk_plug_map (GtkWidget *widget)
 590 {
 591   if (GTK_WIDGET_TOPLEVEL (widget))
 592     {
 593       GtkBin *bin = GTK_BIN (widget);
 594
 595       GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
 596
 597       if (bin->child &&
 598           GTK_WIDGET_VISIBLE (bin->child) &&
 599           !GTK_WIDGET_MAPPED (bin->child))
 600         gtk_widget_map (bin->child);
 601
 602       xembed_set_info (widget->window, XEMBED_MAPPED);
 603
 604       gdk_synthesize_window_state (widget->window,
 605                                    GDK_WINDOW_STATE_WITHDRAWN,
 606                                    0);
 607     }
 608   else
 609     GTK_WIDGET_CLASS (bin_class)->map (widget);
 610 }
 611
 612 static void
 613 gtk_plug_unmap (GtkWidget *widget)
 614 {
 615   if (GTK_WIDGET_TOPLEVEL (widget))
 616     {
 617       GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
 618
 619       gdk_window_hide (widget->window);
 620       xembed_set_info (widget->window, 0);
 621
 622       gdk_synthesize_window_state (widget->window,
 623                                    0,
 624                                    GDK_WINDOW_STATE_WITHDRAWN);
 625     }
 626   else
 627     GTK_WIDGET_CLASS (bin_class)->unmap (widget);
 628 }
 629
 630 static void
 631 gtk_plug_size_allocate (GtkWidget     *widget,
 632                         GtkAllocation *allocation)
 633 {
 634   if (GTK_WIDGET_TOPLEVEL (widget))
 635     GTK_WIDGET_CLASS (parent_class)->size_allocate (widget, allocation);
 636   else
 637     {
 638       GtkBin *bin = GTK_BIN (widget);
 639
 640       widget->allocation = *allocation;
 641
 642       if (GTK_WIDGET_REALIZED (widget))
 643         gdk_window_move_resize (widget->window,
 644                                 allocation->x, allocation->y,
 645                                 allocation->width, allocation->height);
 646
 647       if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 648         {
 649           GtkAllocation child_allocation;
 650
 651           child_allocation.x = child_allocation.y = GTK_CONTAINER (widget)->border_width;
 652           child_allocation.width =
 653             MAX (1, (gint)allocation->width - child_allocation.x * 2);
 654           child_allocation.height =
 655             MAX (1, (gint)allocation->height - child_allocation.y * 2);
 656
 657           gtk_widget_size_allocate (bin->child, &child_allocation);
 658         }
 659
 660     }
 661 }
 662
 663 static gboolean
 664 gtk_plug_key_press_event (GtkWidget   *widget,
 665                           GdkEventKey *event)
 666 {
 667   if (GTK_WIDGET_TOPLEVEL (widget))
 668     return GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, event);
 669   else
 670     return FALSE;
 671 }
 672
 673 static gboolean
 674 gtk_plug_focus_event (GtkWidget      *widget,
 675                       GdkEventFocus  *event)
 676 {
 677   /* We eat focus-in events and focus-out events, since they
 678    * can be generated by something like a keyboard grab on
 679    * a child of the plug.
 680    */
 681   return FALSE;
 682 }
 683
 684 static void
 685 gtk_plug_set_focus (GtkWindow *window,
 686                     GtkWidget *focus)
 687 {
 688   GtkPlug *plug = GTK_PLUG (window);
 689
 690   GTK_WINDOW_CLASS (parent_class)->set_focus (window, focus);
 691
 692   /* Ask for focus from embedder
 693    */
 694
 695   if (focus && !window->has_toplevel_focus)
 696     {
 697       send_xembed_message (plug, XEMBED_REQUEST_FOCUS, 0, 0, 0,
 698                            gtk_get_current_event_time ());
 699     }
 700 }
 701
 702 typedef struct
 703 {
 704   guint                  accelerator_key;
 705   GdkModifierType        accelerator_mods;
 706 } GrabbedKey;
 707
 708 static guint
 709 grabbed_key_hash (gconstpointer a)
 710 {
 711   const GrabbedKey *key = a;
 712   guint h;
 713
 714   h = key->accelerator_key << 16;
 715   h ^= key->accelerator_key >> 16;
 716   h ^= key->accelerator_mods;
 717
 718   return h;
 719 }
 720
 721 static gboolean
 722 grabbed_key_equal (gconstpointer a, gconstpointer b)
 723 {
 724   const GrabbedKey *keya = a;
 725   const GrabbedKey *keyb = b;
 726
 727   return (keya->accelerator_key == keyb->accelerator_key &&
 728           keya->accelerator_mods == keyb->accelerator_mods);
 729 }
 730
 731 static void
 732 add_grabbed_key (gpointer key, gpointer val, gpointer data)
 733 {
 734   GrabbedKey *grabbed_key = key;
 735   GtkPlug *plug = data;
 736
 737   if (!plug->grabbed_keys ||
 738       !g_hash_table_lookup (plug->grabbed_keys, grabbed_key))
 739     {
 740       send_xembed_message (plug, XEMBED_GTK_GRAB_KEY, 0,
 741                            grabbed_key->accelerator_key, grabbed_key->accelerator_mods,
 742                            gtk_get_current_event_time ());
 743     }
 744 }
 745
 746 static void
 747 add_grabbed_key_always (gpointer key, gpointer val, gpointer data)
 748 {
 749   GrabbedKey *grabbed_key = key;
 750   GtkPlug *plug = data;
 751
 752   send_xembed_message (plug, XEMBED_GTK_GRAB_KEY, 0,
 753                        grabbed_key->accelerator_key, grabbed_key->accelerator_mods,
 754                        gtk_get_current_event_time ());
 755 }
 756
 757 static void
 758 remove_grabbed_key (gpointer key, gpointer val, gpointer data)
 759 {
 760   GrabbedKey *grabbed_key = key;
 761   GtkPlug *plug = data;
 762
 763   if (!plug->grabbed_keys ||
 764       !g_hash_table_lookup (plug->grabbed_keys, grabbed_key))
 765     {
 766       send_xembed_message (plug, XEMBED_GTK_UNGRAB_KEY, 0,
 767                            grabbed_key->accelerator_key, grabbed_key->accelerator_mods,
 768                            gtk_get_current_event_time ());
 769     }
 770 }
 771
 772 static void
 773 keys_foreach (GtkWindow      *window,
 774               guint           keyval,
 775               GdkModifierType modifiers,
 776               gboolean        is_mnemonic,
 777               gpointer        data)
 778 {
 779   GHashTable *new_grabbed_keys = data;
 780   GrabbedKey *key = g_new (GrabbedKey, 1);
 781
 782   key->accelerator_key = keyval;
 783   key->accelerator_mods = modifiers;
 784
 785   g_hash_table_replace (new_grabbed_keys, key, key);
 786 }
 787
 788 static void
 789 gtk_plug_keys_changed (GtkWindow *window)
 790 {
 791   GHashTable *new_grabbed_keys, *old_grabbed_keys;
 792   GtkPlug *plug = GTK_PLUG (window);
 793
 794   new_grabbed_keys = g_hash_table_new_full (grabbed_key_hash, grabbed_key_equal, (GDestroyNotify)g_free, NULL);
 795   _gtk_window_keys_foreach (window, keys_foreach, new_grabbed_keys);
 796
 797   if (plug->socket_window)
 798     g_hash_table_foreach (new_grabbed_keys, add_grabbed_key, plug);
 799
 800   old_grabbed_keys = plug->grabbed_keys;
 801   plug->grabbed_keys = new_grabbed_keys;
 802
 803   if (old_grabbed_keys)
 804     {
 805       if (plug->socket_window)
 806         g_hash_table_foreach (old_grabbed_keys, remove_grabbed_key, plug);
 807       g_hash_table_destroy (old_grabbed_keys);
 808     }
 809 }
 810
 811 static gboolean
 812 gtk_plug_focus (GtkWidget        *widget,
 813                 GtkDirectionType  direction)
 814 {
 815   GtkBin *bin = GTK_BIN (widget);
 816   GtkPlug *plug = GTK_PLUG (widget);
 817   GtkWindow *window = GTK_WINDOW (widget);
 818   GtkContainer *container = GTK_CONTAINER (widget);
 819   GtkWidget *old_focus_child = container->focus_child;
 820   GtkWidget *parent;
 821
 822   /* We override GtkWindow's behavior, since we don't want wrapping here.
 823    */
 824   if (old_focus_child)
 825     {
 826       if (gtk_widget_child_focus (old_focus_child, direction))
 827         return TRUE;
 828
 829       if (window->focus_widget)
 830         {
 831           /* Wrapped off the end, clear the focus setting for the toplevel */
 832           parent = window->focus_widget->parent;
 833           while (parent)
 834             {
 835               gtk_container_set_focus_child (GTK_CONTAINER (parent), NULL);
 836               parent = GTK_WIDGET (parent)->parent;
 837             }
 838
 839           gtk_window_set_focus (GTK_WINDOW (container), NULL);
 840
 841           if (!GTK_CONTAINER (window)->focus_child)
 842             {
 843               gint message = -1;
 844
 845               switch (direction)
 846                 {
 847                 case GTK_DIR_UP:
 848                 case GTK_DIR_LEFT:
 849                 case GTK_DIR_TAB_BACKWARD:
 850                   message = XEMBED_FOCUS_PREV;
 851                   break;
 852                 case GTK_DIR_DOWN:
 853                 case GTK_DIR_RIGHT:
 854                 case GTK_DIR_TAB_FORWARD:
 855                   message = XEMBED_FOCUS_NEXT;
 856                   break;
 857                 }
 858
 859               send_xembed_message (plug, message, 0, 0, 0,
 860                                    gtk_get_current_event_time ());
 861             }
 862         }
 863
 864       return FALSE;
 865     }
 866   else
 867     {
 868       /* Try to focus the first widget in the window */
 869
 870       if (bin->child && gtk_widget_child_focus (bin->child, direction))
 871         return TRUE;
 872     }
 873
 874   return FALSE;
 875 }
 876
 877 static void
 878 gtk_plug_check_resize (GtkContainer *container)
 879 {
 880   if (GTK_WIDGET_TOPLEVEL (container))
 881     GTK_CONTAINER_CLASS (parent_class)->check_resize (container);
 882   else
 883     GTK_CONTAINER_CLASS (bin_class)->check_resize (container);
 884 }
 885
 886 static void
 887 send_xembed_message (GtkPlug *plug,
 888                      glong      message,
 889                      glong      detail,
 890                      glong      data1,
 891                      glong      data2,
 892                      guint32    time)
 893 {
 894   if (plug->socket_window)
 895     {
 896       GdkDisplay *display = gdk_drawable_get_display (plug->socket_window);
 897       XEvent xevent;
 898
 899       GTK_NOTE(PLUGSOCKET,
 900                g_message ("GtkPlug: Sending XEMBED message of type %ld", message));
 901
 902       xevent.xclient.window = GDK_WINDOW_XWINDOW (plug->socket_window);
 903       xevent.xclient.type = ClientMessage;
 904       xevent.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "_XEMBED");
 905       xevent.xclient.format = 32;
 906       xevent.xclient.data.l[0] = time;
 907       xevent.xclient.data.l[1] = message;
 908       xevent.xclient.data.l[2] = detail;
 909       xevent.xclient.data.l[3] = data1;
 910       xevent.xclient.data.l[4] = data2;
 911
 912       gdk_error_trap_push ();
 913       XSendEvent (GDK_WINDOW_XDISPLAY(plug->socket_window),
 914                   GDK_WINDOW_XWINDOW (plug->socket_window),
 915                   False, NoEventMask, &xevent);
 916       gdk_display_sync (display);
 917       gdk_error_trap_pop ();
 918     }
 919 }
 920
 921 static void
 922 focus_first_last (GtkPlug          *plug,
 923                   GtkDirectionType  direction)
 924 {
 925   GtkWindow *window = GTK_WINDOW (plug);
 926   GtkWidget *parent;
 927
 928   if (window->focus_widget)
 929     {
 930       parent = window->focus_widget->parent;
 931       while (parent)
 932         {
 933           gtk_container_set_focus_child (GTK_CONTAINER (parent), NULL);
 934           parent = GTK_WIDGET (parent)->parent;
 935         }
 936
 937       gtk_window_set_focus (GTK_WINDOW (plug), NULL);
 938     }
 939
 940   gtk_widget_child_focus (GTK_WIDGET (plug), direction);
 941 }
 942
 943 static void
 944 handle_modality_on (GtkPlug *plug)
 945 {
 946   if (!plug->modality_window)
 947     {
 948       plug->modality_window = gtk_window_new (GTK_WINDOW_POPUP);
 949       gtk_window_set_screen (GTK_WINDOW (plug->modality_window),
 950                              gtk_widget_get_screen (GTK_WIDGET (plug)));
 951       gtk_widget_realize (plug->modality_window);
 952       gtk_window_group_add_window (plug->modality_group, GTK_WINDOW (plug->modality_window));
 953       gtk_grab_add (plug->modality_window);
 954     }
 955 }
 956
 957 static void
 958 handle_modality_off (GtkPlug *plug)
 959 {
 960   if (plug->modality_window)
 961     {
 962       gtk_widget_destroy (plug->modality_window);
 963       plug->modality_window = NULL;
 964     }
 965 }
 966
 967 static void
 968 xembed_set_info (GdkWindow     *window,
 969                  unsigned long  flags)
 970 {
 971   GdkDisplay *display = gdk_drawable_get_display (window);
 972   unsigned long buffer[2];
 973
 974   Atom xembed_info_atom = gdk_x11_get_xatom_by_name_for_display (display, "_XEMBED_INFO");
 975
 976   buffer[1] = 0;                /* Protocol version */
 977   buffer[1] = flags;
 978
 979   XChangeProperty (GDK_DISPLAY_XDISPLAY (display),
 980                    GDK_WINDOW_XWINDOW (window),
 981                    xembed_info_atom, xembed_info_atom, 32,
 982                    PropModeReplace,
 983                    (unsigned char *)buffer, 2);
 984 }
 985
 986 static void
 987 handle_xembed_message (GtkPlug   *plug,
 988                        glong      message,
 989                        glong      detail,
 990                        glong      data1,
 991                        glong      data2,
 992                        guint32    time)
 993 {
 994   GtkWindow *window = GTK_WINDOW (plug);
 995
 996   GTK_NOTE (PLUGSOCKET,
 997             g_message ("GtkPlug: Message of type %ld received", message));
 998
 999   switch (message)
1000     {
1001     case XEMBED_EMBEDDED_NOTIFY:
1002       break;
1003     case XEMBED_WINDOW_ACTIVATE:
1004       _gtk_window_set_is_active (window, TRUE);
1005       break;
1006     case XEMBED_WINDOW_DEACTIVATE:
1007       _gtk_window_set_is_active (window, FALSE);
1008       break;
1009
1010     case XEMBED_MODALITY_ON:
1011       handle_modality_on (plug);
1012       break;
1013     case XEMBED_MODALITY_OFF:
1014       handle_modality_off (plug);
1015       break;
1016
1017     case XEMBED_FOCUS_IN:
1018       _gtk_window_set_has_toplevel_focus (window, TRUE);
1019       switch (detail)
1020         {
1021         case XEMBED_FOCUS_FIRST:
1022           focus_first_last (plug, GTK_DIR_TAB_FORWARD);
1023           break;
1024         case XEMBED_FOCUS_LAST:
1025           focus_first_last (plug, GTK_DIR_TAB_BACKWARD);
1026           break;
1027         case XEMBED_FOCUS_CURRENT:
1028           break;
1029         }
1030       break;
1031
1032     case XEMBED_FOCUS_OUT:
1033       _gtk_window_set_has_toplevel_focus (window, FALSE);
1034       break;
1035
1036     case XEMBED_GRAB_KEY:
1037     case XEMBED_UNGRAB_KEY:
1038     case XEMBED_GTK_GRAB_KEY:
1039     case XEMBED_GTK_UNGRAB_KEY:
1040     case XEMBED_REQUEST_FOCUS:
1041     case XEMBED_FOCUS_NEXT:
1042     case XEMBED_FOCUS_PREV:
1043       g_warning ("GtkPlug: Invalid _XEMBED message of type %ld received", message);
1044       break;
1045
1046     default:
1047       GTK_NOTE(PLUGSOCKET,
1048                g_message ("GtkPlug: Ignoring unknown _XEMBED message of type %ld", message));
1049       break;
1050     }
1051 }
1052
1053 static GdkFilterReturn
1054 gtk_plug_filter_func (GdkXEvent *gdk_xevent, GdkEvent *event, gpointer data)
1055 {
1056   GdkScreen *screen = gdk_drawable_get_screen (event->any.window);
1057   GdkDisplay *display = gdk_screen_get_display (screen);
1058   GtkPlug *plug = GTK_PLUG (data);
1059   XEvent *xevent = (XEvent *)gdk_xevent;
1060
1061   GdkFilterReturn return_val;
1062
1063   return_val = GDK_FILTER_CONTINUE;
1064
1065   switch (xevent->type)
1066     {
1067     case ClientMessage:
1068       if (xevent->xclient.message_type == gdk_x11_get_xatom_by_name_for_display (display, "_XEMBED"))
1069         {
1070           handle_xembed_message (plug,
1071                                  xevent->xclient.data.l[1],
1072                                  xevent->xclient.data.l[2],
1073                                  xevent->xclient.data.l[3],
1074                                  xevent->xclient.data.l[4],
1075                                  xevent->xclient.data.l[0]);
1076
1077
1078           return GDK_FILTER_REMOVE;
1079         }
1080       else if (xevent->xclient.message_type == gdk_x11_get_xatom_by_name_for_display (display, "WM_DELETE_WINDOW"))
1081         {
1082           /* We filter these out because we take being reparented back to the
1083            * root window as the reliable end of the embedding protocol
1084            */
1085
1086           return GDK_FILTER_REMOVE;
1087         }
1088       break;
1089     case ReparentNotify:
1090       {
1091         XReparentEvent *xre = &xevent->xreparent;
1092         gboolean was_embedded = plug->socket_window != NULL;
1093
1094         return_val = GDK_FILTER_REMOVE;
1095
1096         g_object_ref (plug);
1097
1098         if (was_embedded)
1099           {
1100             /* End of embedding protocol for previous socket */
1101
1102             /* FIXME: race if we remove from another socket and
1103              * then add to a local window before we get notification
1104              * Probably need check in _gtk_plug_add_to_socket
1105              */
1106
1107             if (xre->parent != GDK_WINDOW_XWINDOW (plug->socket_window))
1108               {
1109                 GtkWidget *widget = GTK_WIDGET (plug);
1110
1111                 gdk_window_set_user_data (plug->socket_window, NULL);
1112                 g_object_unref (plug->socket_window);
1113                 plug->socket_window = NULL;
1114
1115                 /* Emit a delete window, as if the user attempted
1116                  * to close the toplevel. Simple as to how we
1117                  * handle WM_DELETE_WINDOW, if it isn't handled
1118                  * we destroy the widget. BUt only do this if
1119                  * we are being reparented to the root window.
1120                  * Moving from one embedder to another should
1121                  * be invisible to the app.
1122                  */
1123
1124                 if (xre->parent == GDK_WINDOW_XWINDOW (gdk_screen_get_root_window (screen)))
1125                   send_delete_event (widget);
1126               }
1127             else
1128               goto done;
1129           }
1130
1131         if (xre->parent != GDK_WINDOW_XWINDOW (gdk_screen_get_root_window (screen)))
1132           {
1133             /* Start of embedding protocol */
1134
1135             plug->socket_window = gdk_window_lookup_for_display (display, xre->parent);
1136             if (plug->socket_window)
1137               {
1138                 gpointer user_data = NULL;
1139                 gdk_window_get_user_data (plug->socket_window, &user_data);
1140
1141                 if (user_data)
1142                   {
1143                     g_warning (G_STRLOC "Plug reparented unexpectedly into window in the same process");
1144                     plug->socket_window = NULL;
1145                     break;
1146                   }
1147
1148                 g_object_ref (plug->socket_window);
1149               }
1150             else
1151               {
1152                 plug->socket_window = gdk_window_foreign_new_for_display (display, xre->parent);
1153                 if (!plug->socket_window) /* Already gone */
1154                   break;
1155               }
1156
1157             if (plug->grabbed_keys)
1158               g_hash_table_foreach (plug->grabbed_keys, add_grabbed_key_always, plug);
1159
1160             if (!was_embedded)
1161               g_signal_emit (plug, plug_signals[EMBEDDED], 0);
1162           }
1163
1164       done:
1165         g_object_unref (plug);
1166
1167         break;
1168       }
1169     }
1170
1171   return GDK_FILTER_CONTINUE;
1172 }