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