Pileus Git - ~andy/gtk/blob - gtk/gtkdnd-quartz.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1999 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
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include "config.h"
  28
  29 #include <stdlib.h>
  30 #include <string.h>
  31
  32 #include "gdkconfig.h"
  33
  34 #include "gdk/gdkkeysyms.h"
  35
  36 #include "gtkdnd.h"
  37 #include "gtkiconfactory.h"
  38 #include "gtkicontheme.h"
  39 #include "gtkimage.h"
  40 #include "gtkinvisible.h"
  41 #include "gtkmain.h"
  42 #include "gtkplug.h"
  43 #include "gtkstock.h"
  44 #include "gtkwindow.h"
  45 #include "gtkintl.h"
  46 #include "gtkquartz.h"
  47 #include "gtkalias.h"
  48 #include "gdk/quartz/gdkquartz.h"
  49
  50 typedef struct _GtkDragSourceSite GtkDragSourceSite;
  51 typedef struct _GtkDragSourceInfo GtkDragSourceInfo;
  52 typedef struct _GtkDragDestSite GtkDragDestSite;
  53 typedef struct _GtkDragDestInfo GtkDragDestInfo;
  54 typedef struct _GtkDragFindData GtkDragFindData;
  55
  56 static void     gtk_drag_find_widget            (GtkWidget        *widget,
  57                                                  GtkDragFindData  *data);
  58 static void     gtk_drag_dest_site_destroy      (gpointer          data);
  59 static void     gtk_drag_dest_leave             (GtkWidget        *widget,
  60                                                  GdkDragContext   *context,
  61                                                  guint             time);
  62 static GtkDragDestInfo *gtk_drag_get_dest_info  (GdkDragContext   *context,
  63                                                  gboolean          create);
  64 static void gtk_drag_source_site_destroy        (gpointer           data);
  65
  66 static GtkDragSourceInfo *gtk_drag_get_source_info (GdkDragContext *context,
  67                                                     gboolean        create);
  68
  69 extern GdkDragContext *gdk_quartz_drag_source_context (); /* gdk/quartz/gdkdnd-quartz.c */
  70
  71 struct _GtkDragSourceSite
  72 {
  73   GdkModifierType    start_button_mask;
  74   GtkTargetList     *target_list;        /* Targets for drag data */
  75   GdkDragAction      actions;            /* Possible actions */
  76
  77   /* Drag icon */
  78   GtkImageType icon_type;
  79   union
  80   {
  81     GtkImagePixmapData pixmap;
  82     GtkImagePixbufData pixbuf;
  83     GtkImageStockData stock;
  84     GtkImageIconNameData name;
  85   } icon_data;
  86   GdkBitmap *icon_mask;
  87
  88   GdkColormap       *colormap;           /* Colormap for drag icon */
  89
  90   /* Stored button press information to detect drag beginning */
  91   gint               state;
  92   gint               x, y;
  93 };
  94
  95 struct _GtkDragSourceInfo
  96 {
  97   GtkWidget         *source_widget;
  98   GtkWidget         *widget;
  99   GtkTargetList     *target_list; /* Targets for drag data */
 100   GdkDragAction      possible_actions; /* Actions allowed by source */
 101   GdkDragContext    *context;     /* drag context */
 102   NSEvent           *nsevent;     /* what started it */
 103   gint hot_x, hot_y;              /* Hot spot for drag */
 104   GdkPixbuf         *icon_pixbuf;
 105   gboolean           success;
 106   gboolean           delete;
 107 };
 108
 109 struct _GtkDragDestSite
 110 {
 111   GtkDestDefaults    flags;
 112   GtkTargetList     *target_list;
 113   GdkDragAction      actions;
 114   guint              have_drag : 1;
 115   guint              track_motion : 1;
 116 };
 117
 118 struct _GtkDragDestInfo
 119 {
 120   GtkWidget         *widget;       /* Widget in which drag is in */
 121   GdkDragContext    *context;      /* Drag context */
 122   guint              dropped : 1;     /* Set after we receive a drop */
 123   gint               drop_x, drop_y; /* Position of drop */
 124 };
 125
 126 struct _GtkDragFindData
 127 {
 128   gint x;
 129   gint y;
 130   GdkDragContext *context;
 131   GtkDragDestInfo *info;
 132   gboolean found;
 133   gboolean toplevel;
 134   gboolean (*callback) (GtkWidget *widget, GdkDragContext *context,
 135                         gint x, gint y, guint32 time);
 136   guint32 time;
 137 };
 138
 139
 140 @interface GtkDragSourceOwner : NSObject {
 141   GtkDragSourceInfo *info;
 142 }
 143
 144 @end
 145
 146 @implementation GtkDragSourceOwner
 147 -(void)pasteboard:(NSPasteboard *)sender provideDataForType:(NSString *)type
 148 {
 149   guint target_info;
 150   GtkSelectionData selection_data;
 151
 152   selection_data.selection = GDK_NONE;
 153   selection_data.data = NULL;
 154   selection_data.length = -1;
 155   selection_data.target = _gtk_quartz_pasteboard_type_to_atom (type);
 156
 157   if (gtk_target_list_find (info->target_list,
 158                             selection_data.target,
 159                             &target_info))
 160     {
 161       g_signal_emit_by_name (info->widget, "drag-data-get",
 162                              info->context,
 163                              &selection_data,
 164                              target_info,
 165                              time);
 166
 167       if (selection_data.length >= 0)
 168         _gtk_quartz_set_selection_data_for_pasteboard (sender, &selection_data);
 169
 170       g_free (selection_data.data);
 171     }
 172 }
 173
 174 - (id)initWithInfo:(GtkDragSourceInfo *)anInfo
 175 {
 176   self = [super init];
 177
 178   if (self)
 179     {
 180       info = anInfo;
 181     }
 182
 183   return self;
 184 }
 185
 186 @end
 187
 188 void
 189 gtk_drag_get_data (GtkWidget      *widget,
 190                    GdkDragContext *context,
 191                    GdkAtom         target,
 192                    guint32         time)
 193 {
 194   id <NSDraggingInfo> dragging_info;
 195   NSPasteboard *pasteboard;
 196   GtkSelectionData *selection_data;
 197   GtkDragDestInfo *info;
 198   GtkDragDestSite *site;
 199
 200   dragging_info = gdk_quartz_drag_context_get_dragging_info_libgtk_only (context);
 201   pasteboard = [dragging_info draggingPasteboard];
 202
 203   info = gtk_drag_get_dest_info (context, FALSE);
 204   site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
 205
 206   selection_data = _gtk_quartz_get_selection_data_from_pasteboard (pasteboard,
 207                                                                    target, 0);
 208
 209   if (site && site->target_list)
 210     {
 211       guint target_info;
 212
 213       if (gtk_target_list_find (site->target_list,
 214                                 selection_data->target,
 215                                 &target_info))
 216         {
 217           if (!(site->flags & GTK_DEST_DEFAULT_DROP) ||
 218               selection_data->length >= 0)
 219             g_signal_emit_by_name (widget,
 220                                    "drag-data-received",
 221                                    context, info->drop_x, info->drop_y,
 222                                    selection_data,
 223                                    target_info, time);
 224         }
 225     }
 226   else
 227     {
 228       g_signal_emit_by_name (widget,
 229                              "drag-data-received",
 230                              context, info->drop_x, info->drop_y,
 231                              selection_data,
 232                              0, time);
 233     }
 234
 235   if (site && site->flags & GTK_DEST_DEFAULT_DROP)
 236     {
 237       gtk_drag_finish (context,
 238                        (selection_data->length >= 0),
 239                        (context->action == GDK_ACTION_MOVE),
 240                        time);
 241     }
 242 }
 243
 244 void
 245 gtk_drag_finish (GdkDragContext *context,
 246                  gboolean        success,
 247                  gboolean        del,
 248                  guint32         time)
 249 {
 250   GtkDragSourceInfo *info;
 251   GdkDragContext* source_context = gdk_quartz_drag_source_context ();
 252
 253   if (source_context)
 254     {
 255       info = gtk_drag_get_source_info (source_context, FALSE);
 256       if (info)
 257         {
 258           info->success = success;
 259           info->delete = del;
 260         }
 261     }
 262 }
 263
 264 static void
 265 gtk_drag_dest_info_destroy (gpointer data)
 266 {
 267   GtkDragDestInfo *info = data;
 268
 269   g_free (info);
 270 }
 271
 272 static GtkDragDestInfo *
 273 gtk_drag_get_dest_info (GdkDragContext *context,
 274                         gboolean        create)
 275 {
 276   GtkDragDestInfo *info;
 277   static GQuark info_quark = 0;
 278   if (!info_quark)
 279     info_quark = g_quark_from_static_string ("gtk-dest-info");
 280
 281   info = g_object_get_qdata (G_OBJECT (context), info_quark);
 282   if (!info && create)
 283     {
 284       info = g_new (GtkDragDestInfo, 1);
 285       info->widget = NULL;
 286       info->context = context;
 287       info->dropped = FALSE;
 288       g_object_set_qdata_full (G_OBJECT (context), info_quark,
 289                                info, gtk_drag_dest_info_destroy);
 290     }
 291
 292   return info;
 293 }
 294
 295 static GQuark dest_info_quark = 0;
 296
 297 static GtkDragSourceInfo *
 298 gtk_drag_get_source_info (GdkDragContext *context,
 299                           gboolean        create)
 300 {
 301   GtkDragSourceInfo *info;
 302
 303   if (!dest_info_quark)
 304     dest_info_quark = g_quark_from_static_string ("gtk-source-info");
 305
 306   info = g_object_get_qdata (G_OBJECT (context), dest_info_quark);
 307   if (!info && create)
 308     {
 309       info = g_new0 (GtkDragSourceInfo, 1);
 310       info->context = context;
 311       g_object_set_qdata (G_OBJECT (context), dest_info_quark, info);
 312     }
 313
 314   return info;
 315 }
 316
 317 static void
 318 gtk_drag_clear_source_info (GdkDragContext *context)
 319 {
 320   g_object_set_qdata (G_OBJECT (context), dest_info_quark, NULL);
 321 }
 322
 323 GtkWidget *
 324 gtk_drag_get_source_widget (GdkDragContext *context)
 325 {
 326   GtkDragSourceInfo *info;
 327   GdkDragContext* real_source_context = gdk_quartz_drag_source_context();
 328
 329   if (!real_source_context)
 330     return NULL;
 331
 332   info = gtk_drag_get_source_info (real_source_context, FALSE);
 333   if (!info)
 334      return NULL;
 335
 336   return info->source_widget;
 337 }
 338
 339 /*************************************************************
 340  * gtk_drag_highlight_expose:
 341  *     Callback for expose_event for highlighted widgets.
 342  *   arguments:
 343  *     widget:
 344  *     event:
 345  *     data:
 346  *   results:
 347  *************************************************************/
 348
 349 static gboolean
 350 gtk_drag_highlight_expose (GtkWidget      *widget,
 351                            GdkEventExpose *event,
 352                            gpointer        data)
 353 {
 354   gint x, y, width, height;
 355
 356   if (gtk_widget_is_drawable (widget))
 357     {
 358       cairo_t *cr;
 359
 360       if (!gtk_widget_get_has_window (widget))
 361         {
 362           x = widget->allocation.x;
 363           y = widget->allocation.y;
 364           width = widget->allocation.width;
 365           height = widget->allocation.height;
 366         }
 367       else
 368         {
 369           x = 0;
 370           y = 0;
 371           gdk_drawable_get_size (widget->window, &width, &height);
 372         }
 373
 374       gtk_paint_shadow (widget->style, widget->window,
 375                         GTK_STATE_NORMAL, GTK_SHADOW_OUT,
 376                         NULL, widget, "dnd",
 377                         x, y, width, height);
 378
 379       cr = gdk_cairo_create (widget->window);
 380       cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
 381       cairo_set_line_width (cr, 1.0);
 382       cairo_rectangle (cr,
 383                        x + 0.5, y + 0.5,
 384                        width - 1, height - 1);
 385       cairo_stroke (cr);
 386       cairo_destroy (cr);
 387     }
 388
 389   return FALSE;
 390 }
 391
 392 /*************************************************************
 393  * gtk_drag_highlight:
 394  *     Highlight the given widget in the default manner.
 395  *   arguments:
 396  *     widget:
 397  *   results:
 398  *************************************************************/
 399
 400 void
 401 gtk_drag_highlight (GtkWidget  *widget)
 402 {
 403   g_return_if_fail (GTK_IS_WIDGET (widget));
 404
 405   g_signal_connect_after (widget, "expose-event",
 406                           G_CALLBACK (gtk_drag_highlight_expose),
 407                           NULL);
 408
 409   gtk_widget_queue_draw (widget);
 410 }
 411
 412 /*************************************************************
 413  * gtk_drag_unhighlight:
 414  *     Refresh the given widget to remove the highlight.
 415  *   arguments:
 416  *     widget:
 417  *   results:
 418  *************************************************************/
 419
 420 void
 421 gtk_drag_unhighlight (GtkWidget *widget)
 422 {
 423   g_return_if_fail (GTK_IS_WIDGET (widget));
 424
 425   g_signal_handlers_disconnect_by_func (widget,
 426                                         gtk_drag_highlight_expose,
 427                                         NULL);
 428
 429   gtk_widget_queue_draw (widget);
 430 }
 431
 432 static NSWindow *
 433 get_toplevel_nswindow (GtkWidget *widget)
 434 {
 435   GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
 436
 437   if (gtk_widget_is_toplevel (toplevel) && toplevel->window)
 438     return [gdk_quartz_window_get_nsview (toplevel->window) window];
 439   else
 440     return NULL;
 441 }
 442
 443 static void
 444 register_types (GtkWidget *widget, GtkDragDestSite *site)
 445 {
 446   if (site->target_list)
 447     {
 448       NSWindow *nswindow = get_toplevel_nswindow (widget);
 449       NSSet *types;
 450       NSAutoreleasePool *pool;
 451
 452       if (!nswindow)
 453         return;
 454
 455       pool = [[NSAutoreleasePool alloc] init];
 456       types = _gtk_quartz_target_list_to_pasteboard_types (site->target_list);
 457
 458       [nswindow registerForDraggedTypes:[types allObjects]];
 459
 460       [types release];
 461       [pool release];
 462     }
 463 }
 464
 465 static void
 466 gtk_drag_dest_realized (GtkWidget *widget,
 467                         gpointer   user_data)
 468 {
 469   GtkDragDestSite *site = user_data;
 470
 471   register_types (widget, site);
 472 }
 473
 474 static void
 475 gtk_drag_dest_hierarchy_changed (GtkWidget *widget,
 476                                  GtkWidget *previous_toplevel,
 477                                  gpointer   user_data)
 478 {
 479   GtkDragDestSite *site = user_data;
 480
 481   register_types (widget, site);
 482 }
 483
 484 static void
 485 gtk_drag_dest_site_destroy (gpointer data)
 486 {
 487   GtkDragDestSite *site = data;
 488
 489   if (site->target_list)
 490     gtk_target_list_unref (site->target_list);
 491
 492   g_free (site);
 493 }
 494
 495 void
 496 gtk_drag_dest_set (GtkWidget            *widget,
 497                    GtkDestDefaults       flags,
 498                    const GtkTargetEntry *targets,
 499                    gint                  n_targets,
 500                    GdkDragAction         actions)
 501 {
 502   GtkDragDestSite *old_site, *site;
 503
 504   g_return_if_fail (GTK_IS_WIDGET (widget));
 505
 506   old_site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
 507
 508   site = g_new (GtkDragDestSite, 1);
 509   site->flags = flags;
 510   site->have_drag = FALSE;
 511   if (targets)
 512     site->target_list = gtk_target_list_new (targets, n_targets);
 513   else
 514     site->target_list = NULL;
 515   site->actions = actions;
 516
 517   if (old_site)
 518     site->track_motion = old_site->track_motion;
 519   else
 520     site->track_motion = FALSE;
 521
 522   gtk_drag_dest_unset (widget);
 523
 524   if (GTK_WIDGET_REALIZED (widget))
 525     gtk_drag_dest_realized (widget, site);
 526
 527   g_signal_connect (widget, "realize",
 528                     G_CALLBACK (gtk_drag_dest_realized), site);
 529   g_signal_connect (widget, "hierarchy-changed",
 530                     G_CALLBACK (gtk_drag_dest_hierarchy_changed), site);
 531
 532   g_object_set_data_full (G_OBJECT (widget), I_("gtk-drag-dest"),
 533                           site, gtk_drag_dest_site_destroy);
 534 }
 535
 536 void
 537 gtk_drag_dest_set_proxy (GtkWidget      *widget,
 538                          GdkWindow      *proxy_window,
 539                          GdkDragProtocol protocol,
 540                          gboolean        use_coordinates)
 541 {
 542   g_warning ("gtk_drag_dest_set_proxy is not supported on Mac OS X.");
 543 }
 544
 545 void
 546 gtk_drag_dest_unset (GtkWidget *widget)
 547 {
 548   GtkDragDestSite *old_site;
 549
 550   g_return_if_fail (GTK_IS_WIDGET (widget));
 551
 552   old_site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
 553   if (old_site)
 554     {
 555       g_signal_handlers_disconnect_by_func (widget,
 556                                             gtk_drag_dest_realized,
 557                                             old_site);
 558       g_signal_handlers_disconnect_by_func (widget,
 559                                             gtk_drag_dest_hierarchy_changed,
 560                                             old_site);
 561     }
 562
 563   g_object_set_data (G_OBJECT (widget), I_("gtk-drag-dest"), NULL);
 564 }
 565
 566 GtkTargetList*
 567 gtk_drag_dest_get_target_list (GtkWidget *widget)
 568 {
 569   GtkDragDestSite *site;
 570
 571   g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
 572
 573   site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
 574
 575   return site ? site->target_list : NULL;
 576 }
 577
 578 void
 579 gtk_drag_dest_set_target_list (GtkWidget      *widget,
 580                                GtkTargetList  *target_list)
 581 {
 582   GtkDragDestSite *site;
 583
 584   g_return_if_fail (GTK_IS_WIDGET (widget));
 585
 586   site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
 587
 588   if (!site)
 589     {
 590       g_warning ("Can't set a target list on a widget until you've called gtk_drag_dest_set() "
 591                  "to make the widget into a drag destination");
 592       return;
 593     }
 594
 595   if (target_list)
 596     gtk_target_list_ref (target_list);
 597
 598   if (site->target_list)
 599     gtk_target_list_unref (site->target_list);
 600
 601   site->target_list = target_list;
 602
 603   register_types (widget, site);
 604 }
 605
 606 void
 607 gtk_drag_dest_add_text_targets (GtkWidget *widget)
 608 {
 609   GtkTargetList *target_list;
 610
 611   target_list = gtk_drag_dest_get_target_list (widget);
 612   if (target_list)
 613     gtk_target_list_ref (target_list);
 614   else
 615     target_list = gtk_target_list_new (NULL, 0);
 616   gtk_target_list_add_text_targets (target_list, 0);
 617   gtk_drag_dest_set_target_list (widget, target_list);
 618   gtk_target_list_unref (target_list);
 619 }
 620
 621 void
 622 gtk_drag_dest_add_image_targets (GtkWidget *widget)
 623 {
 624   GtkTargetList *target_list;
 625
 626   target_list = gtk_drag_dest_get_target_list (widget);
 627   if (target_list)
 628     gtk_target_list_ref (target_list);
 629   else
 630     target_list = gtk_target_list_new (NULL, 0);
 631   gtk_target_list_add_image_targets (target_list, 0, FALSE);
 632   gtk_drag_dest_set_target_list (widget, target_list);
 633   gtk_target_list_unref (target_list);
 634 }
 635
 636 void
 637 gtk_drag_dest_add_uri_targets (GtkWidget *widget)
 638 {
 639   GtkTargetList *target_list;
 640
 641   target_list = gtk_drag_dest_get_target_list (widget);
 642   if (target_list)
 643     gtk_target_list_ref (target_list);
 644   else
 645     target_list = gtk_target_list_new (NULL, 0);
 646   gtk_target_list_add_uri_targets (target_list, 0);
 647   gtk_drag_dest_set_target_list (widget, target_list);
 648   gtk_target_list_unref (target_list);
 649 }
 650
 651 static void
 652 prepend_and_ref_widget (GtkWidget *widget,
 653                         gpointer   data)
 654 {
 655   GSList **slist_p = data;
 656
 657   *slist_p = g_slist_prepend (*slist_p, g_object_ref (widget));
 658 }
 659
 660 static void
 661 gtk_drag_find_widget (GtkWidget       *widget,
 662                       GtkDragFindData *data)
 663 {
 664   GtkAllocation new_allocation;
 665   gint allocation_to_window_x = 0;
 666   gint allocation_to_window_y = 0;
 667   gint x_offset = 0;
 668   gint y_offset = 0;
 669
 670   if (data->found || !GTK_WIDGET_MAPPED (widget) || !gtk_widget_get_sensitive (widget))
 671     return;
 672
 673   /* Note that in the following code, we only count the
 674    * position as being inside a WINDOW widget if it is inside
 675    * widget->window; points that are outside of widget->window
 676    * but within the allocation are not counted. This is consistent
 677    * with the way we highlight drag targets.
 678    *
 679    * data->x,y are relative to widget->parent->window (if
 680    * widget is not a toplevel, widget->window otherwise).
 681    * We compute the allocation of widget in the same coordinates,
 682    * clipping to widget->window, and all intermediate
 683    * windows. If data->x,y is inside that, then we translate
 684    * our coordinates to be relative to widget->window and
 685    * recurse.
 686    */
 687   new_allocation = widget->allocation;
 688
 689   if (widget->parent)
 690     {
 691       gint tx, ty;
 692       GdkWindow *window = widget->window;
 693
 694       /* Compute the offset from allocation-relative to
 695        * window-relative coordinates.
 696        */
 697       allocation_to_window_x = widget->allocation.x;
 698       allocation_to_window_y = widget->allocation.y;
 699
 700       if (gtk_widget_get_has_window (widget))
 701         {
 702           /* The allocation is relative to the parent window for
 703            * window widgets, not to widget->window.
 704            */
 705           gdk_window_get_position (window, &tx, &ty);
 706
 707           allocation_to_window_x -= tx;
 708           allocation_to_window_y -= ty;
 709         }
 710
 711       new_allocation.x = 0 + allocation_to_window_x;
 712       new_allocation.y = 0 + allocation_to_window_y;
 713
 714       while (window && window != widget->parent->window)
 715         {
 716           GdkRectangle window_rect = { 0, 0, 0, 0 };
 717
 718           gdk_drawable_get_size (window, &window_rect.width, &window_rect.height);
 719
 720           gdk_rectangle_intersect (&new_allocation, &window_rect, &new_allocation);
 721
 722           gdk_window_get_position (window, &tx, &ty);
 723           new_allocation.x += tx;
 724           x_offset += tx;
 725           new_allocation.y += ty;
 726           y_offset += ty;
 727
 728           window = gdk_window_get_parent (window);
 729         }
 730
 731       if (!window)              /* Window and widget heirarchies didn't match. */
 732         return;
 733     }
 734
 735   if (data->toplevel ||
 736       ((data->x >= new_allocation.x) && (data->y >= new_allocation.y) &&
 737        (data->x < new_allocation.x + new_allocation.width) &&
 738        (data->y < new_allocation.y + new_allocation.height)))
 739     {
 740       /* First, check if the drag is in a valid drop site in
 741        * one of our children
 742        */
 743       if (GTK_IS_CONTAINER (widget))
 744         {
 745           GtkDragFindData new_data = *data;
 746           GSList *children = NULL;
 747           GSList *tmp_list;
 748
 749           new_data.x -= x_offset;
 750           new_data.y -= y_offset;
 751           new_data.found = FALSE;
 752           new_data.toplevel = FALSE;
 753
 754           /* need to reference children temporarily in case the
 755            * ::drag-motion/::drag-drop callbacks change the widget hierarchy.
 756            */
 757           gtk_container_forall (GTK_CONTAINER (widget), prepend_and_ref_widget, &children);
 758           for (tmp_list = children; tmp_list; tmp_list = tmp_list->next)
 759             {
 760               if (!new_data.found && gtk_widget_is_drawable (tmp_list->data))
 761                 gtk_drag_find_widget (tmp_list->data, &new_data);
 762               g_object_unref (tmp_list->data);
 763             }
 764           g_slist_free (children);
 765
 766           data->found = new_data.found;
 767         }
 768
 769       /* If not, and this widget is registered as a drop site, check to
 770        * emit "drag-motion" to check if we are actually in
 771        * a drop site.
 772        */
 773       if (!data->found &&
 774           g_object_get_data (G_OBJECT (widget), "gtk-drag-dest"))
 775         {
 776           data->found = data->callback (widget,
 777                                         data->context,
 778                                         data->x - x_offset - allocation_to_window_x,
 779                                         data->y - y_offset - allocation_to_window_y,
 780                                         data->time);
 781           /* If so, send a "drag-leave" to the last widget */
 782           if (data->found)
 783             {
 784               if (data->info->widget && data->info->widget != widget)
 785                 {
 786                   gtk_drag_dest_leave (data->info->widget, data->context, data->time);
 787                 }
 788               data->info->widget = widget;
 789             }
 790         }
 791     }
 792 }
 793
 794 static void
 795 gtk_drag_dest_leave (GtkWidget      *widget,
 796                      GdkDragContext *context,
 797                      guint           time)
 798 {
 799   GtkDragDestSite *site;
 800
 801   site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
 802   g_return_if_fail (site != NULL);
 803
 804   if ((site->flags & GTK_DEST_DEFAULT_HIGHLIGHT) && site->have_drag)
 805     gtk_drag_unhighlight (widget);
 806
 807   if (!(site->flags & GTK_DEST_DEFAULT_MOTION) || site->have_drag ||
 808       site->track_motion)
 809     g_signal_emit_by_name (widget, "drag-leave", context, time);
 810
 811   site->have_drag = FALSE;
 812 }
 813
 814 static gboolean
 815 gtk_drag_dest_motion (GtkWidget      *widget,
 816                       GdkDragContext *context,
 817                       gint            x,
 818                       gint            y,
 819                       guint           time)
 820 {
 821   GtkDragDestSite *site;
 822   GdkDragAction action = 0;
 823   gboolean retval;
 824
 825   site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
 826   g_return_val_if_fail (site != NULL, FALSE);
 827
 828   if (site->track_motion || site->flags & GTK_DEST_DEFAULT_MOTION)
 829     {
 830       if (context->suggested_action & site->actions)
 831         action = context->suggested_action;
 832
 833       if (action && gtk_drag_dest_find_target (widget, context, NULL))
 834         {
 835           if (!site->have_drag)
 836             {
 837               site->have_drag = TRUE;
 838               if (site->flags & GTK_DEST_DEFAULT_HIGHLIGHT)
 839                 gtk_drag_highlight (widget);
 840             }
 841
 842           gdk_drag_status (context, action, time);
 843         }
 844       else
 845         {
 846           gdk_drag_status (context, 0, time);
 847           if (!site->track_motion)
 848             return TRUE;
 849         }
 850     }
 851
 852   g_signal_emit_by_name (widget, "drag-motion",
 853                          context, x, y, time, &retval);
 854
 855   return (site->flags & GTK_DEST_DEFAULT_MOTION) ? TRUE : retval;
 856 }
 857
 858 static gboolean
 859 gtk_drag_dest_drop (GtkWidget        *widget,
 860                     GdkDragContext   *context,
 861                     gint              x,
 862                     gint              y,
 863                     guint             time)
 864 {
 865   GtkDragDestSite *site;
 866   GtkDragDestInfo *info;
 867   gboolean retval;
 868
 869   site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
 870   g_return_val_if_fail (site != NULL, FALSE);
 871
 872   info = gtk_drag_get_dest_info (context, FALSE);
 873   g_return_val_if_fail (info != NULL, FALSE);
 874
 875   info->drop_x = x;
 876   info->drop_y = y;
 877
 878   if (site->flags & GTK_DEST_DEFAULT_DROP)
 879     {
 880       GdkAtom target = gtk_drag_dest_find_target (widget, context, NULL);
 881
 882       if (target == GDK_NONE)
 883         {
 884           gtk_drag_finish (context, FALSE, FALSE, time);
 885           return TRUE;
 886         }
 887       else
 888         gtk_drag_get_data (widget, context, target, time);
 889     }
 890
 891   g_signal_emit_by_name (widget, "drag-drop",
 892                          context, x, y, time, &retval);
 893
 894   return (site->flags & GTK_DEST_DEFAULT_DROP) ? TRUE : retval;
 895 }
 896
 897 void
 898 gtk_drag_dest_set_track_motion (GtkWidget *widget,
 899                                 gboolean   track_motion)
 900 {
 901   GtkDragDestSite *site;
 902
 903   g_return_if_fail (GTK_IS_WIDGET (widget));
 904
 905   site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
 906
 907   g_return_if_fail (site != NULL);
 908
 909   site->track_motion = track_motion != FALSE;
 910 }
 911
 912 gboolean
 913 gtk_drag_dest_get_track_motion (GtkWidget *widget)
 914 {
 915   GtkDragDestSite *site;
 916
 917   g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
 918
 919   site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
 920
 921   if (site)
 922     return site->track_motion;
 923
 924   return FALSE;
 925 }
 926
 927 void
 928 _gtk_drag_dest_handle_event (GtkWidget *toplevel,
 929                              GdkEvent  *event)
 930 {
 931   GtkDragDestInfo *info;
 932   GdkDragContext *context;
 933
 934   g_return_if_fail (toplevel != NULL);
 935   g_return_if_fail (event != NULL);
 936
 937   context = event->dnd.context;
 938
 939   info = gtk_drag_get_dest_info (context, TRUE);
 940
 941   /* Find the widget for the event */
 942   switch (event->type)
 943     {
 944     case GDK_DRAG_ENTER:
 945       break;
 946
 947     case GDK_DRAG_LEAVE:
 948       if (info->widget)
 949         {
 950           gtk_drag_dest_leave (info->widget, context, event->dnd.time);
 951           info->widget = NULL;
 952         }
 953       break;
 954
 955     case GDK_DRAG_MOTION:
 956     case GDK_DROP_START:
 957       {
 958         GtkDragFindData data;
 959         gint tx, ty;
 960
 961         if (event->type == GDK_DROP_START)
 962           {
 963             info->dropped = TRUE;
 964             /* We send a leave here so that the widget unhighlights
 965              * properly.
 966              */
 967             if (info->widget)
 968               {
 969                 gtk_drag_dest_leave (info->widget, context, event->dnd.time);
 970                 info->widget = NULL;
 971               }
 972           }
 973
 974         gdk_window_get_position (toplevel->window, &tx, &ty);
 975
 976         data.x = event->dnd.x_root - tx;
 977         data.y = event->dnd.y_root - ty;
 978         data.context = context;
 979         data.info = info;
 980         data.found = FALSE;
 981         data.toplevel = TRUE;
 982         data.callback = (event->type == GDK_DRAG_MOTION) ?
 983           gtk_drag_dest_motion : gtk_drag_dest_drop;
 984         data.time = event->dnd.time;
 985
 986         gtk_drag_find_widget (toplevel, &data);
 987
 988         if (info->widget && !data.found)
 989           {
 990             gtk_drag_dest_leave (info->widget, context, event->dnd.time);
 991             info->widget = NULL;
 992           }
 993
 994         /* Send a reply.
 995          */
 996         if (event->type == GDK_DRAG_MOTION)
 997           {
 998             if (!data.found)
 999               gdk_drag_status (context, 0, event->dnd.time);
1000           }
1001
1002         break;
1003       default:
1004         g_assert_not_reached ();
1005       }
1006     }
1007 }
1008
1009
1010 GdkAtom
1011 gtk_drag_dest_find_target (GtkWidget      *widget,
1012                            GdkDragContext *context,
1013                            GtkTargetList  *target_list)
1014 {
1015   id <NSDraggingInfo> dragging_info;
1016   NSPasteboard *pasteboard;
1017   GtkWidget *source_widget;
1018   GList *tmp_target;
1019   GList *tmp_source = NULL;
1020   GList *source_targets;
1021
1022   g_return_val_if_fail (GTK_IS_WIDGET (widget), GDK_NONE);
1023   g_return_val_if_fail (GDK_IS_DRAG_CONTEXT (context), GDK_NONE);
1024   g_return_val_if_fail (!context->is_source, GDK_NONE);
1025
1026   dragging_info = gdk_quartz_drag_context_get_dragging_info_libgtk_only (context);
1027   pasteboard = [dragging_info draggingPasteboard];
1028
1029   source_widget = gtk_drag_get_source_widget (context);
1030
1031   if (target_list == NULL)
1032     target_list = gtk_drag_dest_get_target_list (widget);
1033
1034   if (target_list == NULL)
1035     return GDK_NONE;
1036
1037   source_targets = _gtk_quartz_pasteboard_types_to_atom_list ([pasteboard types]);
1038   tmp_target = target_list->list;
1039   while (tmp_target)
1040     {
1041       GtkTargetPair *pair = tmp_target->data;
1042       tmp_source = source_targets;
1043       while (tmp_source)
1044         {
1045           if (tmp_source->data == GUINT_TO_POINTER (pair->target))
1046             {
1047               if ((!(pair->flags & GTK_TARGET_SAME_APP) || source_widget) &&
1048                   (!(pair->flags & GTK_TARGET_SAME_WIDGET) || (source_widget == widget)))
1049                 {
1050                   g_list_free (source_targets);
1051                   return pair->target;
1052                 }
1053               else
1054                 break;
1055             }
1056           tmp_source = tmp_source->next;
1057         }
1058       tmp_target = tmp_target->next;
1059     }
1060
1061   g_list_free (source_targets);
1062   return GDK_NONE;
1063 }
1064
1065 static gboolean
1066 gtk_drag_begin_idle (gpointer arg)
1067 {
1068   NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
1069   GdkDragContext* context = (GdkDragContext*) arg;
1070   GtkDragSourceInfo* info = gtk_drag_get_source_info (context, FALSE);
1071   NSWindow *nswindow;
1072   NSPasteboard *pasteboard;
1073   GtkDragSourceOwner *owner;
1074   NSPoint point;
1075   NSSet *types;
1076   NSImage *drag_image;
1077
1078   g_assert (info != NULL);
1079
1080   pasteboard = [NSPasteboard pasteboardWithName:NSDragPboard];
1081   owner = [[GtkDragSourceOwner alloc] initWithInfo:info];
1082
1083   types = _gtk_quartz_target_list_to_pasteboard_types (info->target_list);
1084
1085   [pasteboard declareTypes:[types allObjects] owner:owner];
1086
1087   [owner release];
1088   [types release];
1089
1090   if ((nswindow = get_toplevel_nswindow (info->source_widget)) == NULL)
1091      return FALSE;
1092
1093   /* Ref the context. It's unreffed when the drag has been aborted */
1094   g_object_ref (info->context);
1095
1096   /* FIXME: If the event isn't a mouse event, use the global cursor position instead */
1097   point = [info->nsevent locationInWindow];
1098
1099   drag_image = _gtk_quartz_create_image_from_pixbuf (info->icon_pixbuf);
1100
1101   [nswindow dragImage:drag_image
1102                    at:point
1103                offset:NSMakeSize(0, 0)
1104                 event:info->nsevent
1105            pasteboard:pasteboard
1106                source:nswindow
1107             slideBack:YES];
1108
1109   [info->nsevent release];
1110   [drag_image release];
1111
1112   [pool release];
1113
1114   return FALSE;
1115 }
1116
1117 static GdkDragContext *
1118 gtk_drag_begin_internal (GtkWidget         *widget,
1119                          GtkDragSourceSite *site,
1120                          GtkTargetList     *target_list,
1121                          GdkDragAction      actions,
1122                          gint               button,
1123                          GdkEvent          *event)
1124 {
1125   GtkDragSourceInfo *info;
1126   GdkDragContext *context;
1127   NSWindow *nswindow;
1128
1129   context = gdk_drag_begin (NULL, NULL);
1130   context->is_source = TRUE;
1131
1132   info = gtk_drag_get_source_info (context, TRUE);
1133
1134   info->source_widget = g_object_ref (widget);
1135   info->widget = g_object_ref (widget);
1136   info->target_list = target_list;
1137   gtk_target_list_ref (target_list);
1138
1139   info->possible_actions = actions;
1140
1141   g_signal_emit_by_name (widget, "drag-begin", info->context);
1142
1143   /* Ensure that we have an icon before we start the drag; the
1144    * application may have set one in ::drag_begin, or it may
1145    * not have set one.
1146    */
1147   if (!info->icon_pixbuf)
1148     {
1149       if (!site || site->icon_type == GTK_IMAGE_EMPTY)
1150         gtk_drag_set_icon_default (context);
1151       else
1152         switch (site->icon_type)
1153           {
1154           case GTK_IMAGE_PIXMAP:
1155             /* This is not supported, so just set a small transparent pixbuf
1156              * since we need to have something.
1157              */
1158             if (0)
1159               gtk_drag_set_icon_pixmap (context,
1160                                         site->colormap,
1161                                         site->icon_data.pixmap.pixmap,
1162                                         site->icon_mask,
1163                                         -2, -2);
1164             else
1165               {
1166                 GdkPixbuf *pixbuf;
1167
1168                 pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, 1, 1);
1169                 gdk_pixbuf_fill (pixbuf, 0xffffff);
1170
1171                 gtk_drag_set_icon_pixbuf (context,
1172                                           pixbuf,
1173                                           0, 0);
1174
1175                 g_object_unref (pixbuf);
1176               }
1177             break;
1178           case GTK_IMAGE_PIXBUF:
1179             gtk_drag_set_icon_pixbuf (context,
1180                                       site->icon_data.pixbuf.pixbuf,
1181                                       -2, -2);
1182             break;
1183           case GTK_IMAGE_STOCK:
1184             gtk_drag_set_icon_stock (context,
1185                                      site->icon_data.stock.stock_id,
1186                                      -2, -2);
1187             break;
1188           case GTK_IMAGE_ICON_NAME:
1189             gtk_drag_set_icon_name (context,
1190                                     site->icon_data.name.icon_name,
1191                                     -2, -2);
1192             break;
1193           case GTK_IMAGE_EMPTY:
1194           default:
1195             g_assert_not_reached();
1196             break;
1197           }
1198     }
1199
1200   nswindow = get_toplevel_nswindow (widget);
1201   info->nsevent = [nswindow currentEvent];
1202   [info->nsevent retain];
1203
1204   /* drag will begin in an idle handler to avoid nested run loops */
1205
1206   g_idle_add_full (G_PRIORITY_HIGH_IDLE, gtk_drag_begin_idle, context, NULL);
1207
1208   gdk_pointer_ungrab (0);
1209
1210   return context;
1211 }
1212
1213 GdkDragContext *
1214 gtk_drag_begin (GtkWidget         *widget,
1215                 GtkTargetList     *targets,
1216                 GdkDragAction      actions,
1217                 gint               button,
1218                 GdkEvent          *event)
1219 {
1220   g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
1221   g_return_val_if_fail (GTK_WIDGET_REALIZED (widget), NULL);
1222   g_return_val_if_fail (targets != NULL, NULL);
1223
1224   return gtk_drag_begin_internal (widget, NULL, targets,
1225                                   actions, button, event);
1226 }
1227
1228
1229 static gboolean
1230 gtk_drag_source_event_cb (GtkWidget      *widget,
1231                           GdkEvent       *event,
1232                           gpointer        data)
1233 {
1234   GtkDragSourceSite *site;
1235   gboolean retval = FALSE;
1236   site = (GtkDragSourceSite *)data;
1237
1238   switch (event->type)
1239     {
1240     case GDK_BUTTON_PRESS:
1241       if ((GDK_BUTTON1_MASK << (event->button.button - 1)) & site->start_button_mask)
1242         {
1243           site->state |= (GDK_BUTTON1_MASK << (event->button.button - 1));
1244           site->x = event->button.x;
1245           site->y = event->button.y;
1246         }
1247       break;
1248
1249     case GDK_BUTTON_RELEASE:
1250       if ((GDK_BUTTON1_MASK << (event->button.button - 1)) & site->start_button_mask)
1251         site->state &= ~(GDK_BUTTON1_MASK << (event->button.button - 1));
1252       break;
1253
1254     case GDK_MOTION_NOTIFY:
1255       if (site->state & event->motion.state & site->start_button_mask)
1256         {
1257           /* FIXME: This is really broken and can leave us
1258            * with a stuck grab
1259            */
1260           int i;
1261           for (i=1; i<6; i++)
1262             {
1263               if (site->state & event->motion.state &
1264                   GDK_BUTTON1_MASK << (i - 1))
1265                 break;
1266             }
1267
1268           if (gtk_drag_check_threshold (widget, site->x, site->y,
1269                                         event->motion.x, event->motion.y))
1270             {
1271               site->state = 0;
1272               gtk_drag_begin_internal (widget, site, site->target_list,
1273                                        site->actions,
1274                                        i, event);
1275
1276               retval = TRUE;
1277             }
1278         }
1279       break;
1280
1281     default:                    /* hit for 2/3BUTTON_PRESS */
1282       break;
1283     }
1284
1285   return retval;
1286 }
1287
1288 void
1289 gtk_drag_source_set (GtkWidget            *widget,
1290                      GdkModifierType       start_button_mask,
1291                      const GtkTargetEntry *targets,
1292                      gint                  n_targets,
1293                      GdkDragAction         actions)
1294 {
1295   GtkDragSourceSite *site;
1296
1297   g_return_if_fail (GTK_IS_WIDGET (widget));
1298
1299   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1300
1301   gtk_widget_add_events (widget,
1302                          gtk_widget_get_events (widget) |
1303                          GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
1304                          GDK_BUTTON_MOTION_MASK);
1305
1306   if (site)
1307     {
1308       if (site->target_list)
1309         gtk_target_list_unref (site->target_list);
1310     }
1311   else
1312     {
1313       site = g_new0 (GtkDragSourceSite, 1);
1314
1315       site->icon_type = GTK_IMAGE_EMPTY;
1316
1317       g_signal_connect (widget, "button-press-event",
1318                         G_CALLBACK (gtk_drag_source_event_cb),
1319                         site);
1320       g_signal_connect (widget, "button-release-event",
1321                         G_CALLBACK (gtk_drag_source_event_cb),
1322                         site);
1323       g_signal_connect (widget, "motion-notify-event",
1324                         G_CALLBACK (gtk_drag_source_event_cb),
1325                         site);
1326
1327       g_object_set_data_full (G_OBJECT (widget),
1328                               I_("gtk-site-data"),
1329                               site, gtk_drag_source_site_destroy);
1330     }
1331
1332   site->start_button_mask = start_button_mask;
1333
1334   site->target_list = gtk_target_list_new (targets, n_targets);
1335
1336   site->actions = actions;
1337 }
1338
1339 /*************************************************************
1340  * gtk_drag_source_unset
1341  *     Unregister this widget as a drag source.
1342  *   arguments:
1343  *     widget:
1344  *   results:
1345  *************************************************************/
1346
1347 void
1348 gtk_drag_source_unset (GtkWidget *widget)
1349 {
1350   GtkDragSourceSite *site;
1351
1352   g_return_if_fail (GTK_IS_WIDGET (widget));
1353
1354   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1355
1356   if (site)
1357     {
1358       g_signal_handlers_disconnect_by_func (widget,
1359                                             gtk_drag_source_event_cb,
1360                                             site);
1361       g_object_set_data (G_OBJECT (widget), I_("gtk-site-data"), NULL);
1362     }
1363 }
1364
1365 GtkTargetList *
1366 gtk_drag_source_get_target_list (GtkWidget *widget)
1367 {
1368   GtkDragSourceSite *site;
1369
1370   g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
1371
1372   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1373
1374   return site ? site->target_list : NULL;
1375
1376 }
1377
1378 void
1379 gtk_drag_source_set_target_list (GtkWidget     *widget,
1380                                  GtkTargetList *target_list)
1381 {
1382   GtkDragSourceSite *site;
1383
1384   g_return_if_fail (GTK_IS_WIDGET (widget));
1385
1386   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1387   if (site == NULL)
1388     {
1389       g_warning ("gtk_drag_source_set_target_list() requires the widget "
1390                  "to already be a drag source.");
1391       return;
1392     }
1393
1394   if (target_list)
1395     gtk_target_list_ref (target_list);
1396
1397   if (site->target_list)
1398     gtk_target_list_unref (site->target_list);
1399
1400   site->target_list = target_list;
1401 }
1402
1403 /**
1404  * gtk_drag_source_add_text_targets:
1405  * @widget: a #GtkWidget that's is a drag source
1406  *
1407  * Add the text targets supported by #GtkSelection to
1408  * the target list of the drag source.  The targets
1409  * are added with @info = 0. If you need another value,
1410  * use gtk_target_list_add_text_targets() and
1411  * gtk_drag_source_set_target_list().
1412  *
1413  * Since: 2.6
1414  **/
1415 void
1416 gtk_drag_source_add_text_targets (GtkWidget *widget)
1417 {
1418   GtkTargetList *target_list;
1419
1420   target_list = gtk_drag_source_get_target_list (widget);
1421   if (target_list)
1422     gtk_target_list_ref (target_list);
1423   else
1424     target_list = gtk_target_list_new (NULL, 0);
1425   gtk_target_list_add_text_targets (target_list, 0);
1426   gtk_drag_source_set_target_list (widget, target_list);
1427   gtk_target_list_unref (target_list);
1428 }
1429
1430 void
1431 gtk_drag_source_add_image_targets (GtkWidget *widget)
1432 {
1433   GtkTargetList *target_list;
1434
1435   target_list = gtk_drag_source_get_target_list (widget);
1436   if (target_list)
1437     gtk_target_list_ref (target_list);
1438   else
1439     target_list = gtk_target_list_new (NULL, 0);
1440   gtk_target_list_add_image_targets (target_list, 0, TRUE);
1441   gtk_drag_source_set_target_list (widget, target_list);
1442   gtk_target_list_unref (target_list);
1443 }
1444
1445 void
1446 gtk_drag_source_add_uri_targets (GtkWidget *widget)
1447 {
1448   GtkTargetList *target_list;
1449
1450   target_list = gtk_drag_source_get_target_list (widget);
1451   if (target_list)
1452     gtk_target_list_ref (target_list);
1453   else
1454     target_list = gtk_target_list_new (NULL, 0);
1455   gtk_target_list_add_uri_targets (target_list, 0);
1456   gtk_drag_source_set_target_list (widget, target_list);
1457   gtk_target_list_unref (target_list);
1458 }
1459
1460 static void
1461 gtk_drag_source_unset_icon (GtkDragSourceSite *site)
1462 {
1463   switch (site->icon_type)
1464     {
1465     case GTK_IMAGE_EMPTY:
1466       break;
1467     case GTK_IMAGE_PIXMAP:
1468       if (site->icon_data.pixmap.pixmap)
1469         g_object_unref (site->icon_data.pixmap.pixmap);
1470       if (site->icon_mask)
1471         g_object_unref (site->icon_mask);
1472       break;
1473     case GTK_IMAGE_PIXBUF:
1474       g_object_unref (site->icon_data.pixbuf.pixbuf);
1475       break;
1476     case GTK_IMAGE_STOCK:
1477       g_free (site->icon_data.stock.stock_id);
1478       break;
1479     case GTK_IMAGE_ICON_NAME:
1480       g_free (site->icon_data.name.icon_name);
1481       break;
1482     default:
1483       g_assert_not_reached();
1484       break;
1485     }
1486   site->icon_type = GTK_IMAGE_EMPTY;
1487
1488   if (site->colormap)
1489     g_object_unref (site->colormap);
1490   site->colormap = NULL;
1491 }
1492
1493 static void
1494 gtk_drag_source_site_destroy (gpointer data)
1495 {
1496   GtkDragSourceSite *site = data;
1497
1498   if (site->target_list)
1499     gtk_target_list_unref (site->target_list);
1500
1501   gtk_drag_source_unset_icon (site);
1502   g_free (site);
1503 }
1504
1505 void
1506 gtk_drag_source_set_icon (GtkWidget     *widget,
1507                           GdkColormap   *colormap,
1508                           GdkPixmap     *pixmap,
1509                           GdkBitmap     *mask)
1510 {
1511   GtkDragSourceSite *site;
1512
1513   g_return_if_fail (GTK_IS_WIDGET (widget));
1514   g_return_if_fail (GDK_IS_COLORMAP (colormap));
1515   g_return_if_fail (GDK_IS_PIXMAP (pixmap));
1516   g_return_if_fail (!mask || GDK_IS_PIXMAP (mask));
1517
1518   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1519   g_return_if_fail (site != NULL);
1520
1521   g_object_ref (colormap);
1522   g_object_ref (pixmap);
1523   if (mask)
1524     g_object_ref (mask);
1525
1526   gtk_drag_source_unset_icon (site);
1527
1528   site->icon_type = GTK_IMAGE_PIXMAP;
1529
1530   site->icon_data.pixmap.pixmap = pixmap;
1531   site->icon_mask = mask;
1532   site->colormap = colormap;
1533 }
1534
1535 void
1536 gtk_drag_source_set_icon_pixbuf (GtkWidget   *widget,
1537                                  GdkPixbuf   *pixbuf)
1538 {
1539   GtkDragSourceSite *site;
1540
1541   g_return_if_fail (GTK_IS_WIDGET (widget));
1542   g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
1543
1544   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1545   g_return_if_fail (site != NULL);
1546   g_object_ref (pixbuf);
1547
1548   gtk_drag_source_unset_icon (site);
1549
1550   site->icon_type = GTK_IMAGE_PIXBUF;
1551   site->icon_data.pixbuf.pixbuf = pixbuf;
1552 }
1553
1554 /**
1555  * gtk_drag_source_set_icon_stock:
1556  * @widget: a #GtkWidget
1557  * @stock_id: the ID of the stock icon to use
1558  *
1559  * Sets the icon that will be used for drags from a particular source
1560  * to a stock icon.
1561  **/
1562 void
1563 gtk_drag_source_set_icon_stock (GtkWidget   *widget,
1564                                 const gchar *stock_id)
1565 {
1566   GtkDragSourceSite *site;
1567
1568   g_return_if_fail (GTK_IS_WIDGET (widget));
1569   g_return_if_fail (stock_id != NULL);
1570
1571   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1572   g_return_if_fail (site != NULL);
1573
1574   gtk_drag_source_unset_icon (site);
1575
1576   site->icon_type = GTK_IMAGE_STOCK;
1577   site->icon_data.stock.stock_id = g_strdup (stock_id);
1578 }
1579
1580 /**
1581  * gtk_drag_source_set_icon_name:
1582  * @widget: a #GtkWidget
1583  * @icon_name: name of icon to use
1584  *
1585  * Sets the icon that will be used for drags from a particular source
1586  * to a themed icon. See the docs for #GtkIconTheme for more details.
1587  *
1588  * Since: 2.8
1589  **/
1590 void
1591 gtk_drag_source_set_icon_name (GtkWidget   *widget,
1592                                const gchar *icon_name)
1593 {
1594   GtkDragSourceSite *site;
1595
1596   g_return_if_fail (GTK_IS_WIDGET (widget));
1597   g_return_if_fail (icon_name != NULL);
1598
1599   site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
1600   g_return_if_fail (site != NULL);
1601
1602   gtk_drag_source_unset_icon (site);
1603
1604   site->icon_type = GTK_IMAGE_ICON_NAME;
1605   site->icon_data.name.icon_name = g_strdup (icon_name);
1606 }
1607
1608
1609 /**
1610  * gtk_drag_set_icon_widget:
1611  * @context: the context for a drag. (This must be called
1612           with a  context for the source side of a drag)
1613  * @widget: a toplevel window to use as an icon.
1614  * @hot_x: the X offset within @widget of the hotspot.
1615  * @hot_y: the Y offset within @widget of the hotspot.
1616  *
1617  * Changes the icon for a widget to a given widget. GTK+
1618  * will not destroy the icon, so if you don't want
1619  * it to persist, you should connect to the "drag-end"
1620  * signal and destroy it yourself.
1621  **/
1622 void
1623 gtk_drag_set_icon_widget (GdkDragContext    *context,
1624                           GtkWidget         *widget,
1625                           gint               hot_x,
1626                           gint               hot_y)
1627 {
1628   g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
1629   g_return_if_fail (context->is_source);
1630   g_return_if_fail (GTK_IS_WIDGET (widget));
1631
1632   g_warning ("gtk_drag_set_icon_widget is not supported on Mac OS X");
1633 }
1634
1635 static void
1636 set_icon_stock_pixbuf (GdkDragContext    *context,
1637                        const gchar       *stock_id,
1638                        GdkPixbuf         *pixbuf,
1639                        gint               hot_x,
1640                        gint               hot_y)
1641 {
1642   GtkDragSourceInfo *info;
1643
1644   info = gtk_drag_get_source_info (context, FALSE);
1645
1646   if (stock_id)
1647     {
1648       pixbuf = gtk_widget_render_icon (info->widget, stock_id,
1649                                        GTK_ICON_SIZE_DND, NULL);
1650
1651       if (!pixbuf)
1652         {
1653           g_warning ("Cannot load drag icon from stock_id %s", stock_id);
1654           return;
1655         }
1656     }
1657   else
1658     g_object_ref (pixbuf);
1659
1660   if (info->icon_pixbuf)
1661     g_object_unref (info->icon_pixbuf);
1662   info->icon_pixbuf = pixbuf;
1663   info->hot_x = hot_x;
1664   info->hot_y = hot_y;
1665 }
1666
1667 /**
1668  * gtk_drag_set_icon_pixbuf:
1669  * @context: the context for a drag. (This must be called
1670  *            with a  context for the source side of a drag)
1671  * @pixbuf: the #GdkPixbuf to use as the drag icon.
1672  * @hot_x: the X offset within @widget of the hotspot.
1673  * @hot_y: the Y offset within @widget of the hotspot.
1674  *
1675  * Sets @pixbuf as the icon for a given drag.
1676  **/
1677 void
1678 gtk_drag_set_icon_pixbuf  (GdkDragContext *context,
1679                            GdkPixbuf      *pixbuf,
1680                            gint            hot_x,
1681                            gint            hot_y)
1682 {
1683   g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
1684   g_return_if_fail (context->is_source);
1685   g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
1686
1687   set_icon_stock_pixbuf (context, NULL, pixbuf, hot_x, hot_y);
1688 }
1689
1690 /**
1691  * gtk_drag_set_icon_stock:
1692  * @context: the context for a drag. (This must be called
1693  *            with a  context for the source side of a drag)
1694  * @stock_id: the ID of the stock icon to use for the drag.
1695  * @hot_x: the X offset within the icon of the hotspot.
1696  * @hot_y: the Y offset within the icon of the hotspot.
1697  *
1698  * Sets the icon for a given drag from a stock ID.
1699  **/
1700 void
1701 gtk_drag_set_icon_stock  (GdkDragContext *context,
1702                           const gchar    *stock_id,
1703                           gint            hot_x,
1704                           gint            hot_y)
1705 {
1706
1707   g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
1708   g_return_if_fail (context->is_source);
1709   g_return_if_fail (stock_id != NULL);
1710
1711   set_icon_stock_pixbuf (context, stock_id, NULL, hot_x, hot_y);
1712 }
1713
1714 /**
1715  * gtk_drag_set_icon_pixmap:
1716  * @context: the context for a drag. (This must be called
1717  *            with a  context for the source side of a drag)
1718  * @colormap: the colormap of the icon
1719  * @pixmap: the image data for the icon
1720  * @mask: the transparency mask for the icon
1721  * @hot_x: the X offset within @pixmap of the hotspot.
1722  * @hot_y: the Y offset within @pixmap of the hotspot.
1723  *
1724  * Sets @pixmap as the icon for a given drag. GTK+ retains
1725  * references for the arguments, and will release them when
1726  * they are no longer needed. In general, gtk_drag_set_icon_pixbuf()
1727  * will be more convenient to use.
1728  **/
1729 void
1730 gtk_drag_set_icon_pixmap (GdkDragContext    *context,
1731                           GdkColormap       *colormap,
1732                           GdkPixmap         *pixmap,
1733                           GdkBitmap         *mask,
1734                           gint               hot_x,
1735                           gint               hot_y)
1736 {
1737   GdkPixbuf *pixbuf;
1738
1739   g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
1740   g_return_if_fail (context->is_source);
1741   g_return_if_fail (GDK_IS_COLORMAP (colormap));
1742   g_return_if_fail (GDK_IS_PIXMAP (pixmap));
1743
1744   pixbuf = gdk_pixbuf_get_from_drawable (NULL, pixmap, colormap,
1745                                          0, 0, /* src */
1746                                          0, 0, /* dst */
1747                                          -1, -1);
1748
1749   gtk_drag_set_icon_pixbuf (context, pixbuf, hot_x, hot_y);
1750   g_object_unref (pixbuf);
1751 }
1752
1753 /**
1754  * gtk_drag_set_icon_name:
1755  * @context: the context for a drag. (This must be called
1756  *            with a context for the source side of a drag)
1757  * @icon_name: name of icon to use
1758  * @hot_x: the X offset of the hotspot within the icon
1759  * @hot_y: the Y offset of the hotspot within the icon
1760  *
1761  * Sets the icon for a given drag from a named themed icon. See
1762  * the docs for #GtkIconTheme for more details. Note that the
1763  * size of the icon depends on the icon theme (the icon is
1764  * loaded at the symbolic size #GTK_ICON_SIZE_DND), thus
1765  * @hot_x and @hot_y have to be used with care.
1766  *
1767  * Since: 2.8
1768  **/
1769 void
1770 gtk_drag_set_icon_name (GdkDragContext *context,
1771                         const gchar    *icon_name,
1772                         gint            hot_x,
1773                         gint            hot_y)
1774 {
1775   GdkScreen *screen;
1776   GtkSettings *settings;
1777   GtkIconTheme *icon_theme;
1778   GdkPixbuf *pixbuf;
1779   gint width, height, icon_size;
1780
1781   g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
1782   g_return_if_fail (context->is_source);
1783   g_return_if_fail (icon_name != NULL);
1784
1785   screen = gdk_drawable_get_screen (context->source_window);
1786   g_return_if_fail (screen != NULL);
1787
1788   settings = gtk_settings_get_for_screen (screen);
1789   if (gtk_icon_size_lookup_for_settings (settings,
1790                                          GTK_ICON_SIZE_DND,
1791                                          &width, &height))
1792     icon_size = MAX (width, height);
1793   else
1794     icon_size = 32; /* default value for GTK_ICON_SIZE_DND */
1795
1796   icon_theme = gtk_icon_theme_get_for_screen (screen);
1797
1798   pixbuf = gtk_icon_theme_load_icon (icon_theme, icon_name,
1799                                      icon_size, 0, NULL);
1800   if (pixbuf)
1801     set_icon_stock_pixbuf (context, NULL, pixbuf, hot_x, hot_y);
1802   else
1803     g_warning ("Cannot load drag icon from icon name %s", icon_name);
1804 }
1805
1806 /**
1807  * gtk_drag_set_icon_default:
1808  * @context: the context for a drag. (This must be called
1809              with a  context for the source side of a drag)
1810  *
1811  * Sets the icon for a particular drag to the default
1812  * icon.
1813  **/
1814 void
1815 gtk_drag_set_icon_default (GdkDragContext    *context)
1816 {
1817   g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
1818   g_return_if_fail (context->is_source);
1819
1820   gtk_drag_set_icon_stock (context, GTK_STOCK_DND, -2, -2);
1821 }
1822
1823 void
1824 gtk_drag_set_default_icon (GdkColormap   *colormap,
1825                            GdkPixmap     *pixmap,
1826                            GdkBitmap     *mask,
1827                            gint           hot_x,
1828                            gint           hot_y)
1829 {
1830   g_warning ("gtk_drag_set_default_icon is not supported on Mac OS X.");
1831 }
1832
1833 static void
1834 gtk_drag_source_info_destroy (GtkDragSourceInfo *info)
1835 {
1836   if (info->icon_pixbuf)
1837     g_object_unref (info->icon_pixbuf);
1838
1839   g_signal_emit_by_name (info->widget, "drag-end",
1840                          info->context);
1841
1842   if (info->source_widget)
1843     g_object_unref (info->source_widget);
1844
1845   if (info->widget)
1846     g_object_unref (info->widget);
1847
1848   gtk_target_list_unref (info->target_list);
1849
1850   gtk_drag_clear_source_info (info->context);
1851   g_object_unref (info->context);
1852
1853   g_free (info);
1854 }
1855
1856 static gboolean
1857 drag_drop_finished_idle_cb (gpointer data)
1858 {
1859   gtk_drag_source_info_destroy (data);
1860   return FALSE;
1861 }
1862
1863 static void
1864 gtk_drag_drop_finished (GtkDragSourceInfo *info)
1865 {
1866   if (info->success && info->delete)
1867     g_signal_emit_by_name (info->source_widget, "drag-data-delete",
1868                            info->context);
1869
1870   /* Workaround for the fact that the NS API blocks until the drag is
1871    * over. This way the context is still valid when returning from
1872    * drag_begin, even if it will still be quite useless. See bug #501588.
1873   */
1874   g_idle_add (drag_drop_finished_idle_cb, info);
1875 }
1876
1877 /*************************************************************
1878  * _gtk_drag_source_handle_event:
1879  *     Called from widget event handling code on Drag events
1880  *     for drag sources.
1881  *
1882  *   arguments:
1883  *     toplevel: Toplevel widget that received the event
1884  *     event:
1885  *   results:
1886  *************************************************************/
1887
1888 void
1889 _gtk_drag_source_handle_event (GtkWidget *widget,
1890                                GdkEvent  *event)
1891 {
1892   GtkDragSourceInfo *info;
1893   GdkDragContext *context;
1894
1895   g_return_if_fail (widget != NULL);
1896   g_return_if_fail (event != NULL);
1897
1898   context = event->dnd.context;
1899   info = gtk_drag_get_source_info (context, FALSE);
1900   if (!info)
1901     return;
1902
1903   switch (event->type)
1904     {
1905     case GDK_DROP_FINISHED:
1906       gtk_drag_drop_finished (info);
1907       break;
1908     default:
1909       g_assert_not_reached ();
1910     }
1911 }
1912
1913
1914 gboolean
1915 gtk_drag_check_threshold (GtkWidget *widget,
1916                           gint       start_x,
1917                           gint       start_y,
1918                           gint       current_x,
1919                           gint       current_y)
1920 {
1921   gint drag_threshold;
1922
1923   g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
1924
1925   g_object_get (gtk_widget_get_settings (widget),
1926                 "gtk-dnd-drag-threshold", &drag_threshold,
1927                 NULL);
1928
1929   return (ABS (current_x - start_x) > drag_threshold ||
1930           ABS (current_y - start_y) > drag_threshold);
1931 }
1932
1933 #define __GTK_DND_C__
1934 #include "gtkaliasdef.c"