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  * Since: 2.2
 356  **/
 357 void
 358 gtk_plug_construct_for_display (GtkPlug         *plug,
 359                                 GdkDisplay      *display,
 360                                 GdkNativeWindow  socket_id)
 361 {
 362   if (socket_id)
 363     {
 364       gpointer user_data = NULL;
 365
 366       plug->socket_window = gdk_window_lookup_for_display (display, socket_id);
 367
 368       if (plug->socket_window)
 369         gdk_window_get_user_data (plug->socket_window, &user_data);
 370       else
 371         plug->socket_window = gdk_window_foreign_new_for_display (display, socket_id);
 372
 373       if (user_data)
 374         {
 375           if (GTK_IS_SOCKET (user_data))
 376             _gtk_plug_add_to_socket (plug, user_data);
 377           else
 378             {
 379               g_warning (G_STRLOC "Can't create GtkPlug as child of non-GtkSocket");
 380               plug->socket_window = NULL;
 381             }
 382         }
 383
 384       if (plug->socket_window)
 385         g_signal_emit (plug, plug_signals[EMBEDDED], 0);
 386     }
 387 }
 388
 389 /**
 390  * gtk_plug_new:
 391  * @socket_id:  the window ID of the socket, or 0.
 392  *
 393  * Creates a new plug widget inside the #GtkSocket identified
 394  * by @socket_id. If @socket_id is 0, the plug is left "unplugged" and
 395  * can later be plugged into a #GtkSocket by  gtk_socket_add_id().
 396  *
 397  * Return value: the new #GtkPlug widget.
 398  **/
 399 GtkWidget*
 400 gtk_plug_new (GdkNativeWindow socket_id)
 401 {
 402   return gtk_plug_new_for_display (gdk_display_get_default (), socket_id);
 403 }
 404
 405 /**
 406  * gtk_plug_new_for_display:
 407  * @display : the #GdkDisplay on which @socket_id is displayed
 408  * @socket_id: the XID of the socket's window.
 409  *
 410  * Create a new plug widget inside the #GtkSocket identified by socket_id.
 411  *
 412  * Return value: the new #GtkPlug widget.
 413  *
 414  * Since: 2.2
 415  */
 416 GtkWidget*
 417 gtk_plug_new_for_display (GdkDisplay      *display,
 418                           GdkNativeWindow  socket_id)
 419 {
 420   GtkPlug *plug;
 421
 422   plug = g_object_new (GTK_TYPE_PLUG, NULL);
 423   gtk_plug_construct_for_display (plug, display, socket_id);
 424   return GTK_WIDGET (plug);
 425 }
 426
 427 /**
 428  * gtk_plug_get_id:
 429  * @plug: a #GtkPlug.
 430  *
 431  * Gets the window ID of a #GtkPlug widget, which can then
 432  * be used to embed this window inside another window, for
 433  * instance with gtk_socket_add_id().
 434  *
 435  * Return value: the window ID for the plug
 436  **/
 437 GdkNativeWindow
 438 gtk_plug_get_id (GtkPlug *plug)
 439 {
 440   g_return_val_if_fail (GTK_IS_PLUG (plug), 0);
 441
 442   if (!GTK_WIDGET_REALIZED (plug))
 443     gtk_widget_realize (GTK_WIDGET (plug));
 444
 445   return GDK_WINDOW_XWINDOW (GTK_WIDGET (plug)->window);
 446 }
 447
 448 static void
 449 gtk_plug_finalize (GObject *object)
 450 {
 451   GtkPlug *plug = GTK_PLUG (object);
 452
 453   if (plug->grabbed_keys)
 454     {
 455       g_hash_table_destroy (plug->grabbed_keys);
 456       plug->grabbed_keys = NULL;
 457     }
 458
 459   G_OBJECT_CLASS (parent_class)->finalize (object);
 460 }
 461
 462 static void
 463 gtk_plug_unrealize (GtkWidget *widget)
 464 {
 465   GtkPlug *plug;
 466
 467   g_return_if_fail (GTK_IS_PLUG (widget));
 468
 469   plug = GTK_PLUG (widget);
 470
 471   if (plug->socket_window != NULL)
 472     {
 473       gdk_window_set_user_data (plug->socket_window, NULL);
 474       g_object_unref (plug->socket_window);
 475       plug->socket_window = NULL;
 476     }
 477
 478   if (!plug->same_app)
 479     {
 480       if (plug->modality_window)
 481         handle_modality_off (plug);
 482
 483       gtk_window_group_remove_window (plug->modality_group, GTK_WINDOW (plug));
 484       g_object_unref (plug->modality_group);
 485     }
 486
 487   if (GTK_WIDGET_CLASS (parent_class)->unrealize)
 488     (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 489 }
 490
 491 static void
 492 gtk_plug_realize (GtkWidget *widget)
 493 {
 494   GtkWindow *window;
 495   GtkPlug *plug;
 496   GdkWindowAttr attributes;
 497   gint attributes_mask;
 498
 499   g_return_if_fail (GTK_IS_PLUG (widget));
 500
 501   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 502   window = GTK_WINDOW (widget);
 503   plug = GTK_PLUG (widget);
 504
 505   attributes.window_type = GDK_WINDOW_CHILD;    /* XXX GDK_WINDOW_PLUG ? */
 506   attributes.title = window->title;
 507   attributes.wmclass_name = window->wmclass_name;
 508   attributes.wmclass_class = window->wmclass_class;
 509   attributes.width = widget->allocation.width;
 510   attributes.height = widget->allocation.height;
 511   attributes.wclass = GDK_INPUT_OUTPUT;
 512
 513   /* this isn't right - we should match our parent's visual/colormap.
 514    * though that will require handling "foreign" colormaps */
 515   attributes.visual = gtk_widget_get_visual (widget);
 516   attributes.colormap = gtk_widget_get_colormap (widget);
 517   attributes.event_mask = gtk_widget_get_events (widget);
 518   attributes.event_mask |= (GDK_EXPOSURE_MASK |
 519                             GDK_KEY_PRESS_MASK |
 520                             GDK_KEY_RELEASE_MASK |
 521                             GDK_ENTER_NOTIFY_MASK |
 522                             GDK_LEAVE_NOTIFY_MASK |
 523                             GDK_STRUCTURE_MASK);
 524
 525   attributes_mask = GDK_WA_VISUAL | GDK_WA_COLORMAP;
 526   attributes_mask |= (window->title ? GDK_WA_TITLE : 0);
 527   attributes_mask |= (window->wmclass_name ? GDK_WA_WMCLASS : 0);
 528
 529   if (GTK_WIDGET_TOPLEVEL (widget))
 530     {
 531       attributes.window_type = GDK_WINDOW_TOPLEVEL;
 532
 533       gdk_error_trap_push ();
 534       if (plug->socket_window)
 535         widget->window = gdk_window_new (plug->socket_window,
 536                                          &attributes, attributes_mask);
 537       else /* If it's a passive plug, we use the root window */
 538         widget->window = gdk_window_new (gtk_widget_get_root_window (widget),
 539                                          &attributes, attributes_mask);
 540
 541       gdk_display_sync (gtk_widget_get_display (widget));
 542       if (gdk_error_trap_pop ()) /* Uh-oh */
 543         {
 544           gdk_error_trap_push ();
 545           gdk_window_destroy (widget->window);
 546           gdk_flush ();
 547           gdk_error_trap_pop ();
 548           widget->window = gdk_window_new (gtk_widget_get_root_window (widget),
 549                                            &attributes, attributes_mask);
 550         }
 551
 552       gdk_window_add_filter (widget->window, gtk_plug_filter_func, widget);
 553
 554       plug->modality_group = gtk_window_group_new ();
 555       gtk_window_group_add_window (plug->modality_group, window);
 556
 557       xembed_set_info (widget->window, 0);
 558     }
 559   else
 560     widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
 561                                      &attributes, attributes_mask);
 562
 563   gdk_window_set_user_data (widget->window, window);
 564
 565   widget->style = gtk_style_attach (widget->style, widget->window);
 566   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 567 }
 568
 569 static void
 570 gtk_plug_show (GtkWidget *widget)
 571 {
 572   if (GTK_WIDGET_TOPLEVEL (widget))
 573     GTK_WIDGET_CLASS (parent_class)->show (widget);
 574   else
 575     GTK_WIDGET_CLASS (bin_class)->show (widget);
 576 }
 577
 578 static void
 579 gtk_plug_hide (GtkWidget *widget)
 580 {
 581   if (GTK_WIDGET_TOPLEVEL (widget))
 582     GTK_WIDGET_CLASS (parent_class)->hide (widget);
 583   else
 584     GTK_WIDGET_CLASS (bin_class)->hide (widget);
 585 }
 586
 587 /* From gdkinternals.h */
 588 void gdk_synthesize_window_state (GdkWindow     *window,
 589                                   GdkWindowState unset_flags,
 590                                   GdkWindowState set_flags);
 591
 592 static void
 593 gtk_plug_map (GtkWidget *widget)
 594 {
 595   if (GTK_WIDGET_TOPLEVEL (widget))
 596     {
 597       GtkBin *bin = GTK_BIN (widget);
 598
 599       GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
 600
 601       if (bin->child &&
 602           GTK_WIDGET_VISIBLE (bin->child) &&
 603           !GTK_WIDGET_MAPPED (bin->child))
 604         gtk_widget_map (bin->child);
 605
 606       xembed_set_info (widget->window, XEMBED_MAPPED);
 607
 608       gdk_synthesize_window_state (widget->window,
 609                                    GDK_WINDOW_STATE_WITHDRAWN,
 610                                    0);
 611     }
 612   else
 613     GTK_WIDGET_CLASS (bin_class)->map (widget);
 614 }
 615
 616 static void
 617 gtk_plug_unmap (GtkWidget *widget)
 618 {
 619   if (GTK_WIDGET_TOPLEVEL (widget))
 620     {
 621       GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
 622
 623       gdk_window_hide (widget->window);
 624       xembed_set_info (widget->window, 0);
 625
 626       gdk_synthesize_window_state (widget->window,
 627                                    0,
 628                                    GDK_WINDOW_STATE_WITHDRAWN);
 629     }
 630   else
 631     GTK_WIDGET_CLASS (bin_class)->unmap (widget);
 632 }
 633
 634 static void
 635 gtk_plug_size_allocate (GtkWidget     *widget,
 636                         GtkAllocation *allocation)
 637 {
 638   if (GTK_WIDGET_TOPLEVEL (widget))
 639     GTK_WIDGET_CLASS (parent_class)->size_allocate (widget, allocation);
 640   else
 641     {
 642       GtkBin *bin = GTK_BIN (widget);
 643
 644       widget->allocation = *allocation;
 645
 646       if (GTK_WIDGET_REALIZED (widget))
 647         gdk_window_move_resize (widget->window,
 648                                 allocation->x, allocation->y,
 649                                 allocation->width, allocation->height);
 650
 651       if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 652         {
 653           GtkAllocation child_allocation;
 654
 655           child_allocation.x = child_allocation.y = GTK_CONTAINER (widget)->border_width;
 656           child_allocation.width =
 657             MAX (1, (gint)allocation->width - child_allocation.x * 2);
 658           child_allocation.height =
 659             MAX (1, (gint)allocation->height - child_allocation.y * 2);
 660
 661           gtk_widget_size_allocate (bin->child, &child_allocation);
 662         }
 663
 664     }
 665 }
 666
 667 static gboolean
 668 gtk_plug_key_press_event (GtkWidget   *widget,
 669                           GdkEventKey *event)
 670 {
 671   if (GTK_WIDGET_TOPLEVEL (widget))
 672     return GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, event);
 673   else
 674     return FALSE;
 675 }
 676
 677 static gboolean
 678 gtk_plug_focus_event (GtkWidget      *widget,
 679                       GdkEventFocus  *event)
 680 {
 681   /* We eat focus-in events and focus-out events, since they
 682    * can be generated by something like a keyboard grab on
 683    * a child of the plug.
 684    */
 685   return FALSE;
 686 }
 687
 688 static void
 689 gtk_plug_set_focus (GtkWindow *window,
 690                     GtkWidget *focus)
 691 {
 692   GtkPlug *plug = GTK_PLUG (window);
 693
 694   GTK_WINDOW_CLASS (parent_class)->set_focus (window, focus);
 695
 696   /* Ask for focus from embedder
 697    */
 698
 699   if (focus && !window->has_toplevel_focus)
 700     {
 701       send_xembed_message (plug, XEMBED_REQUEST_FOCUS, 0, 0, 0,
 702                            gtk_get_current_event_time ());
 703     }
 704 }
 705
 706 typedef struct
 707 {
 708   guint                  accelerator_key;
 709   GdkModifierType        accelerator_mods;
 710 } GrabbedKey;
 711
 712 static guint
 713 grabbed_key_hash (gconstpointer a)
 714 {
 715   const GrabbedKey *key = a;
 716   guint h;
 717
 718   h = key->accelerator_key << 16;
 719   h ^= key->accelerator_key >> 16;
 720   h ^= key->accelerator_mods;
 721
 722   return h;
 723 }
 724
 725 static gboolean
 726 grabbed_key_equal (gconstpointer a, gconstpointer b)
 727 {
 728   const GrabbedKey *keya = a;
 729   const GrabbedKey *keyb = b;
 730
 731   return (keya->accelerator_key == keyb->accelerator_key &&
 732           keya->accelerator_mods == keyb->accelerator_mods);
 733 }
 734
 735 static void
 736 add_grabbed_key (gpointer key, gpointer val, gpointer data)
 737 {
 738   GrabbedKey *grabbed_key = key;
 739   GtkPlug *plug = data;
 740
 741   if (!plug->grabbed_keys ||
 742       !g_hash_table_lookup (plug->grabbed_keys, grabbed_key))
 743     {
 744       send_xembed_message (plug, XEMBED_GTK_GRAB_KEY, 0,
 745                            grabbed_key->accelerator_key, grabbed_key->accelerator_mods,
 746                            gtk_get_current_event_time ());
 747     }
 748 }
 749
 750 static void
 751 add_grabbed_key_always (gpointer key, gpointer val, gpointer data)
 752 {
 753   GrabbedKey *grabbed_key = key;
 754   GtkPlug *plug = data;
 755
 756   send_xembed_message (plug, XEMBED_GTK_GRAB_KEY, 0,
 757                        grabbed_key->accelerator_key, grabbed_key->accelerator_mods,
 758                        gtk_get_current_event_time ());
 759 }
 760
 761 static void
 762 remove_grabbed_key (gpointer key, gpointer val, gpointer data)
 763 {
 764   GrabbedKey *grabbed_key = key;
 765   GtkPlug *plug = data;
 766
 767   if (!plug->grabbed_keys ||
 768       !g_hash_table_lookup (plug->grabbed_keys, grabbed_key))
 769     {
 770       send_xembed_message (plug, XEMBED_GTK_UNGRAB_KEY, 0,
 771                            grabbed_key->accelerator_key, grabbed_key->accelerator_mods,
 772                            gtk_get_current_event_time ());
 773     }
 774 }
 775
 776 static void
 777 keys_foreach (GtkWindow      *window,
 778               guint           keyval,
 779               GdkModifierType modifiers,
 780               gboolean        is_mnemonic,
 781               gpointer        data)
 782 {
 783   GHashTable *new_grabbed_keys = data;
 784   GrabbedKey *key = g_new (GrabbedKey, 1);
 785
 786   key->accelerator_key = keyval;
 787   key->accelerator_mods = modifiers;
 788
 789   g_hash_table_replace (new_grabbed_keys, key, key);
 790 }
 791
 792 static void
 793 gtk_plug_keys_changed (GtkWindow *window)
 794 {
 795   GHashTable *new_grabbed_keys, *old_grabbed_keys;
 796   GtkPlug *plug = GTK_PLUG (window);
 797
 798   new_grabbed_keys = g_hash_table_new_full (grabbed_key_hash, grabbed_key_equal, (GDestroyNotify)g_free, NULL);
 799   _gtk_window_keys_foreach (window, keys_foreach, new_grabbed_keys);
 800
 801   if (plug->socket_window)
 802     g_hash_table_foreach (new_grabbed_keys, add_grabbed_key, plug);
 803
 804   old_grabbed_keys = plug->grabbed_keys;
 805   plug->grabbed_keys = new_grabbed_keys;
 806
 807   if (old_grabbed_keys)
 808     {
 809       if (plug->socket_window)
 810         g_hash_table_foreach (old_grabbed_keys, remove_grabbed_key, plug);
 811       g_hash_table_destroy (old_grabbed_keys);
 812     }
 813 }
 814
 815 static gboolean
 816 gtk_plug_focus (GtkWidget        *widget,
 817                 GtkDirectionType  direction)
 818 {
 819   GtkBin *bin = GTK_BIN (widget);
 820   GtkPlug *plug = GTK_PLUG (widget);
 821   GtkWindow *window = GTK_WINDOW (widget);
 822   GtkContainer *container = GTK_CONTAINER (widget);
 823   GtkWidget *old_focus_child = container->focus_child;
 824   GtkWidget *parent;
 825
 826   /* We override GtkWindow's behavior, since we don't want wrapping here.
 827    */
 828   if (old_focus_child)
 829     {
 830       if (gtk_widget_child_focus (old_focus_child, direction))
 831         return TRUE;
 832
 833       if (window->focus_widget)
 834         {
 835           /* Wrapped off the end, clear the focus setting for the toplevel */
 836           parent = window->focus_widget->parent;
 837           while (parent)
 838             {
 839               gtk_container_set_focus_child (GTK_CONTAINER (parent), NULL);
 840               parent = GTK_WIDGET (parent)->parent;
 841             }
 842
 843           gtk_window_set_focus (GTK_WINDOW (container), NULL);
 844
 845           if (!GTK_CONTAINER (window)->focus_child)
 846             {
 847               gint message = -1;
 848
 849               switch (direction)
 850                 {
 851                 case GTK_DIR_UP:
 852                 case GTK_DIR_LEFT:
 853                 case GTK_DIR_TAB_BACKWARD:
 854                   message = XEMBED_FOCUS_PREV;
 855                   break;
 856                 case GTK_DIR_DOWN:
 857                 case GTK_DIR_RIGHT:
 858                 case GTK_DIR_TAB_FORWARD:
 859                   message = XEMBED_FOCUS_NEXT;
 860                   break;
 861                 }
 862
 863               send_xembed_message (plug, message, 0, 0, 0,
 864                                    gtk_get_current_event_time ());
 865             }
 866         }
 867
 868       return FALSE;
 869     }
 870   else
 871     {
 872       /* Try to focus the first widget in the window */
 873
 874       if (bin->child && gtk_widget_child_focus (bin->child, direction))
 875         return TRUE;
 876     }
 877
 878   return FALSE;
 879 }
 880
 881 static void
 882 gtk_plug_check_resize (GtkContainer *container)
 883 {
 884   if (GTK_WIDGET_TOPLEVEL (container))
 885     GTK_CONTAINER_CLASS (parent_class)->check_resize (container);
 886   else
 887     GTK_CONTAINER_CLASS (bin_class)->check_resize (container);
 888 }
 889
 890 static void
 891 send_xembed_message (GtkPlug *plug,
 892                      glong      message,
 893                      glong      detail,
 894                      glong      data1,
 895                      glong      data2,
 896                      guint32    time)
 897 {
 898   if (plug->socket_window)
 899     {
 900       GdkDisplay *display = gdk_drawable_get_display (plug->socket_window);
 901       XEvent xevent;
 902
 903       GTK_NOTE(PLUGSOCKET,
 904                g_message ("GtkPlug: Sending XEMBED message of type %ld", message));
 905
 906       xevent.xclient.window = GDK_WINDOW_XWINDOW (plug->socket_window);
 907       xevent.xclient.type = ClientMessage;
 908       xevent.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "_XEMBED");
 909       xevent.xclient.format = 32;
 910       xevent.xclient.data.l[0] = time;
 911       xevent.xclient.data.l[1] = message;
 912       xevent.xclient.data.l[2] = detail;
 913       xevent.xclient.data.l[3] = data1;
 914       xevent.xclient.data.l[4] = data2;
 915
 916       gdk_error_trap_push ();
 917       XSendEvent (GDK_WINDOW_XDISPLAY(plug->socket_window),
 918                   GDK_WINDOW_XWINDOW (plug->socket_window),
 919                   False, NoEventMask, &xevent);
 920       gdk_display_sync (display);
 921       gdk_error_trap_pop ();
 922     }
 923 }
 924
 925 static void
 926 focus_first_last (GtkPlug          *plug,
 927                   GtkDirectionType  direction)
 928 {
 929   GtkWindow *window = GTK_WINDOW (plug);
 930   GtkWidget *parent;
 931
 932   if (window->focus_widget)
 933     {
 934       parent = window->focus_widget->parent;
 935       while (parent)
 936         {
 937           gtk_container_set_focus_child (GTK_CONTAINER (parent), NULL);
 938           parent = GTK_WIDGET (parent)->parent;
 939         }
 940
 941       gtk_window_set_focus (GTK_WINDOW (plug), NULL);
 942     }
 943
 944   gtk_widget_child_focus (GTK_WIDGET (plug), direction);
 945 }
 946
 947 static void
 948 handle_modality_on (GtkPlug *plug)
 949 {
 950   if (!plug->modality_window)
 951     {
 952       plug->modality_window = gtk_window_new (GTK_WINDOW_POPUP);
 953       gtk_window_set_screen (GTK_WINDOW (plug->modality_window),
 954                              gtk_widget_get_screen (GTK_WIDGET (plug)));
 955       gtk_widget_realize (plug->modality_window);
 956       gtk_window_group_add_window (plug->modality_group, GTK_WINDOW (plug->modality_window));
 957       gtk_grab_add (plug->modality_window);
 958     }
 959 }
 960
 961 static void
 962 handle_modality_off (GtkPlug *plug)
 963 {
 964   if (plug->modality_window)
 965     {
 966       gtk_widget_destroy (plug->modality_window);
 967       plug->modality_window = NULL;
 968     }
 969 }
 970
 971 static void
 972 xembed_set_info (GdkWindow     *window,
 973                  unsigned long  flags)
 974 {
 975   GdkDisplay *display = gdk_drawable_get_display (window);
 976   unsigned long buffer[2];
 977
 978   Atom xembed_info_atom = gdk_x11_get_xatom_by_name_for_display (display, "_XEMBED_INFO");
 979
 980   buffer[1] = 0;                /* Protocol version */
 981   buffer[1] = flags;
 982
 983   XChangeProperty (GDK_DISPLAY_XDISPLAY (display),
 984                    GDK_WINDOW_XWINDOW (window),
 985                    xembed_info_atom, xembed_info_atom, 32,
 986                    PropModeReplace,
 987                    (unsigned char *)buffer, 2);
 988 }
 989
 990 static void
 991 handle_xembed_message (GtkPlug   *plug,
 992                        glong      message,
 993                        glong      detail,
 994                        glong      data1,
 995                        glong      data2,
 996                        guint32    time)
 997 {
 998   GtkWindow *window = GTK_WINDOW (plug);
 999
1000   GTK_NOTE (PLUGSOCKET,
1001             g_message ("GtkPlug: Message of type %ld received", message));
1002
1003   switch (message)
1004     {
1005     case XEMBED_EMBEDDED_NOTIFY:
1006       break;
1007     case XEMBED_WINDOW_ACTIVATE:
1008       _gtk_window_set_is_active (window, TRUE);
1009       break;
1010     case XEMBED_WINDOW_DEACTIVATE:
1011       _gtk_window_set_is_active (window, FALSE);
1012       break;
1013
1014     case XEMBED_MODALITY_ON:
1015       handle_modality_on (plug);
1016       break;
1017     case XEMBED_MODALITY_OFF:
1018       handle_modality_off (plug);
1019       break;
1020
1021     case XEMBED_FOCUS_IN:
1022       _gtk_window_set_has_toplevel_focus (window, TRUE);
1023       switch (detail)
1024         {
1025         case XEMBED_FOCUS_FIRST:
1026           focus_first_last (plug, GTK_DIR_TAB_FORWARD);
1027           break;
1028         case XEMBED_FOCUS_LAST:
1029           focus_first_last (plug, GTK_DIR_TAB_BACKWARD);
1030           break;
1031         case XEMBED_FOCUS_CURRENT:
1032           break;
1033         }
1034       break;
1035
1036     case XEMBED_FOCUS_OUT:
1037       _gtk_window_set_has_toplevel_focus (window, FALSE);
1038       break;
1039
1040     case XEMBED_GRAB_KEY:
1041     case XEMBED_UNGRAB_KEY:
1042     case XEMBED_GTK_GRAB_KEY:
1043     case XEMBED_GTK_UNGRAB_KEY:
1044     case XEMBED_REQUEST_FOCUS:
1045     case XEMBED_FOCUS_NEXT:
1046     case XEMBED_FOCUS_PREV:
1047       g_warning ("GtkPlug: Invalid _XEMBED message of type %ld received", message);
1048       break;
1049
1050     default:
1051       GTK_NOTE(PLUGSOCKET,
1052                g_message ("GtkPlug: Ignoring unknown _XEMBED message of type %ld", message));
1053       break;
1054     }
1055 }
1056
1057 static GdkFilterReturn
1058 gtk_plug_filter_func (GdkXEvent *gdk_xevent, GdkEvent *event, gpointer data)
1059 {
1060   GdkScreen *screen = gdk_drawable_get_screen (event->any.window);
1061   GdkDisplay *display = gdk_screen_get_display (screen);
1062   GtkPlug *plug = GTK_PLUG (data);
1063   XEvent *xevent = (XEvent *)gdk_xevent;
1064
1065   GdkFilterReturn return_val;
1066
1067   return_val = GDK_FILTER_CONTINUE;
1068
1069   switch (xevent->type)
1070     {
1071     case ClientMessage:
1072       if (xevent->xclient.message_type == gdk_x11_get_xatom_by_name_for_display (display, "_XEMBED"))
1073         {
1074           handle_xembed_message (plug,
1075                                  xevent->xclient.data.l[1],
1076                                  xevent->xclient.data.l[2],
1077                                  xevent->xclient.data.l[3],
1078                                  xevent->xclient.data.l[4],
1079                                  xevent->xclient.data.l[0]);
1080
1081
1082           return GDK_FILTER_REMOVE;
1083         }
1084       else if (xevent->xclient.message_type == gdk_x11_get_xatom_by_name_for_display (display, "WM_DELETE_WINDOW"))
1085         {
1086           /* We filter these out because we take being reparented back to the
1087            * root window as the reliable end of the embedding protocol
1088            */
1089
1090           return GDK_FILTER_REMOVE;
1091         }
1092       break;
1093     case ReparentNotify:
1094       {
1095         XReparentEvent *xre = &xevent->xreparent;
1096         gboolean was_embedded = plug->socket_window != NULL;
1097
1098         return_val = GDK_FILTER_REMOVE;
1099
1100         g_object_ref (plug);
1101
1102         if (was_embedded)
1103           {
1104             /* End of embedding protocol for previous socket */
1105
1106             /* FIXME: race if we remove from another socket and
1107              * then add to a local window before we get notification
1108              * Probably need check in _gtk_plug_add_to_socket
1109              */
1110
1111             if (xre->parent != GDK_WINDOW_XWINDOW (plug->socket_window))
1112               {
1113                 GtkWidget *widget = GTK_WIDGET (plug);
1114
1115                 gdk_window_set_user_data (plug->socket_window, NULL);
1116                 g_object_unref (plug->socket_window);
1117                 plug->socket_window = NULL;
1118
1119                 /* Emit a delete window, as if the user attempted
1120                  * to close the toplevel. Simple as to how we
1121                  * handle WM_DELETE_WINDOW, if it isn't handled
1122                  * we destroy the widget. BUt only do this if
1123                  * we are being reparented to the root window.
1124                  * Moving from one embedder to another should
1125                  * be invisible to the app.
1126                  */
1127
1128                 if (xre->parent == GDK_WINDOW_XWINDOW (gdk_screen_get_root_window (screen)))
1129                   send_delete_event (widget);
1130               }
1131             else
1132               goto done;
1133           }
1134
1135         if (xre->parent != GDK_WINDOW_XWINDOW (gdk_screen_get_root_window (screen)))
1136           {
1137             /* Start of embedding protocol */
1138
1139             plug->socket_window = gdk_window_lookup_for_display (display, xre->parent);
1140             if (plug->socket_window)
1141               {
1142                 gpointer user_data = NULL;
1143                 gdk_window_get_user_data (plug->socket_window, &user_data);
1144
1145                 if (user_data)
1146                   {
1147                     g_warning (G_STRLOC "Plug reparented unexpectedly into window in the same process");
1148                     plug->socket_window = NULL;
1149                     break;
1150                   }
1151
1152                 g_object_ref (plug->socket_window);
1153               }
1154             else
1155               {
1156                 plug->socket_window = gdk_window_foreign_new_for_display (display, xre->parent);
1157                 if (!plug->socket_window) /* Already gone */
1158                   break;
1159               }
1160
1161             if (plug->grabbed_keys)
1162               g_hash_table_foreach (plug->grabbed_keys, add_grabbed_key_always, plug);
1163
1164             if (!was_embedded)
1165               g_signal_emit (plug, plug_signals[EMBEDDED], 0);
1166           }
1167
1168       done:
1169         g_object_unref (plug);
1170
1171         break;
1172       }
1173     }
1174
1175   return GDK_FILTER_CONTINUE;
1176 }