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