gtkdnd-quartz.c 43.1 KB
Newer Older
Cody Russell's avatar
Cody Russell committed
1
/* GTK - The GIMP Toolkit
Anders Carlsson's avatar
Anders Carlsson committed
2 3 4 5 6 7 8 9 10 11 12 13 14
 * Copyright (C) 1995-1999 Peter Mattis, Spencer Kimball and Josh MacDonald
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
Javier Jardón's avatar
Javier Jardón committed
15
 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
Anders Carlsson's avatar
Anders Carlsson committed
16 17 18 19 20 21 22 23 24
 */

/*
 * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
 * file for a list of people on the GTK+ Team.  See the ChangeLog
 * files for a list of changes.  These files are distributed with
 * GTK+ at ftp://ftp.gtk.org/pub/gtk/. 
 */

25
#include "config.h"
Anders Carlsson's avatar
Anders Carlsson committed
26 27 28 29

#include <stdlib.h>
#include <string.h>

30
#include "gdk/gdk.h"
Anders Carlsson's avatar
Anders Carlsson committed
31 32

#include "gtkdnd.h"
33
#include "gtkdndprivate.h"
Anders Carlsson's avatar
Anders Carlsson committed
34
#include "gtkicontheme.h"
35
#include "gtkimageprivate.h"
Anders Carlsson's avatar
Anders Carlsson committed
36 37 38 39 40 41
#include "gtkinvisible.h"
#include "gtkmain.h"
#include "gtkwindow.h"
#include "gtkintl.h"
#include "gtkquartz.h"
#include "gdk/quartz/gdkquartz.h"
42
#include "gtkselectionprivate.h"
43
#include "gtksettings.h"
44
#include "gtkiconhelperprivate.h"
Anders Carlsson's avatar
Anders Carlsson committed
45 46 47 48 49 50 51 52 53 54 55 56 57 58 59

typedef struct _GtkDragSourceInfo GtkDragSourceInfo;
typedef struct _GtkDragDestInfo GtkDragDestInfo;
typedef struct _GtkDragFindData GtkDragFindData;

static void     gtk_drag_find_widget            (GtkWidget        *widget,
						 GtkDragFindData  *data);
static void     gtk_drag_dest_site_destroy      (gpointer          data);
static void     gtk_drag_dest_leave             (GtkWidget        *widget,
						 GdkDragContext   *context,
						 guint             time);
static GtkDragDestInfo *gtk_drag_get_dest_info  (GdkDragContext   *context,
						 gboolean          create);
static void gtk_drag_source_site_destroy        (gpointer           data);

60 61 62
static GtkDragSourceInfo *gtk_drag_get_source_info (GdkDragContext *context,
						    gboolean        create);

Patrick Griffis's avatar
Patrick Griffis committed
63 64
static void gtk_drag_drop_finished (GtkDragSourceInfo *info,
                                   GtkDragResult      result);
65

66 67
extern GdkDragContext *gdk_quartz_drag_source_context (); /* gdk/quartz/gdkdnd-quartz.c */

Anders Carlsson's avatar
Anders Carlsson committed
68 69
struct _GtkDragSourceInfo 
{
70
  GtkWidget         *source_widget;
Anders Carlsson's avatar
Anders Carlsson committed
71 72 73 74
  GtkWidget         *widget;
  GtkTargetList     *target_list; /* Targets for drag data */
  GdkDragAction      possible_actions; /* Actions allowed by source */
  GdkDragContext    *context;	  /* drag context */
75
  NSEvent           *nsevent;     /* what started it */
Anders Carlsson's avatar
Anders Carlsson committed
76
  gint hot_x, hot_y;		  /* Hot spot for drag */
77
  cairo_surface_t   *icon_surface;
78 79
  gboolean           success;
  gboolean           delete;
Anders Carlsson's avatar
Anders Carlsson committed
80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117
};

struct _GtkDragDestInfo 
{
  GtkWidget         *widget;	   /* Widget in which drag is in */
  GdkDragContext    *context;	   /* Drag context */
  guint              dropped : 1;     /* Set after we receive a drop */
  gint               drop_x, drop_y; /* Position of drop */
};

struct _GtkDragFindData 
{
  gint x;
  gint y;
  GdkDragContext *context;
  GtkDragDestInfo *info;
  gboolean found;
  gboolean toplevel;
  gboolean (*callback) (GtkWidget *widget, GdkDragContext *context,
			gint x, gint y, guint32 time);
  guint32 time;
};


@interface GtkDragSourceOwner : NSObject {
  GtkDragSourceInfo *info;
}

@end

@implementation GtkDragSourceOwner
-(void)pasteboard:(NSPasteboard *)sender provideDataForType:(NSString *)type
{
  guint target_info;
  GtkSelectionData selection_data;

  selection_data.selection = GDK_NONE;
  selection_data.data = NULL;
118
  selection_data.length = -1;
119
  selection_data.target = gdk_quartz_pasteboard_type_to_atom_libgtk_only (type);
120
  selection_data.display = gdk_display_get_default ();
Anders Carlsson's avatar
Anders Carlsson committed
121 122 123 124 125

  if (gtk_target_list_find (info->target_list, 
			    selection_data.target, 
			    &target_info)) 
    {
126
      g_signal_emit_by_name (info->widget, "drag-data-get",
Anders Carlsson's avatar
Anders Carlsson committed
127 128 129 130 131
			     info->context,
			     &selection_data,
			     target_info,
			     time);

132 133
      if (selection_data.length >= 0)
        _gtk_quartz_set_selection_data_for_pasteboard (sender, &selection_data);
Anders Carlsson's avatar
Anders Carlsson committed
134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152
      
      g_free (selection_data.data);
    }
}

- (id)initWithInfo:(GtkDragSourceInfo *)anInfo
{
  self = [super init];

  if (self) 
    {
      info = anInfo;
    }

  return self;
}

@end

153 154 155 156 157 158 159 160 161 162
/**
 * gtk_drag_get_data: (method)
 * @widget: the widget that will receive the
 *   #GtkWidget::drag-data-received signal.
 * @context: the drag context
 * @target: the target (form of the data) to retrieve.
 * @time_: a timestamp for retrieving the data. This will
 *   generally be the time received in a #GtkWidget::drag-motion"
 *   or #GtkWidget::drag-drop" signal.
 */
Anders Carlsson's avatar
Anders Carlsson committed
163 164 165 166 167 168
void 
gtk_drag_get_data (GtkWidget      *widget,
		   GdkDragContext *context,
		   GdkAtom         target,
		   guint32         time)
{
169 170
  id <NSDraggingInfo> dragging_info;
  NSPasteboard *pasteboard;
Anders Carlsson's avatar
Anders Carlsson committed
171 172 173 174
  GtkSelectionData *selection_data;
  GtkDragDestInfo *info;
  GtkDragDestSite *site;

175 176 177
  dragging_info = gdk_quartz_drag_context_get_dragging_info_libgtk_only (context);
  pasteboard = [dragging_info draggingPasteboard];

Anders Carlsson's avatar
Anders Carlsson committed
178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194
  info = gtk_drag_get_dest_info (context, FALSE);
  site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");

  selection_data = _gtk_quartz_get_selection_data_from_pasteboard (pasteboard,
								   target, 0);

  if (site && site->target_list)
    {
      guint target_info;
      
      if (gtk_target_list_find (site->target_list, 
				selection_data->target,
				&target_info))
	{
	  if (!(site->flags & GTK_DEST_DEFAULT_DROP) ||
	      selection_data->length >= 0)
	    g_signal_emit_by_name (widget,
195
				   "drag-data-received",
Anders Carlsson's avatar
Anders Carlsson committed
196 197 198 199 200 201 202 203
				   context, info->drop_x, info->drop_y,
				   selection_data,
				   target_info, time);
	}
    }
  else
    {
      g_signal_emit_by_name (widget,
204
			     "drag-data-received",
Anders Carlsson's avatar
Anders Carlsson committed
205 206 207 208 209 210 211 212 213
			     context, info->drop_x, info->drop_y,
			     selection_data,
			     0, time);
    }
  
  if (site && site->flags & GTK_DEST_DEFAULT_DROP)
    {
      gtk_drag_finish (context, 
		       (selection_data->length >= 0),
214
		       (gdk_drag_context_get_selected_action (context) == GDK_ACTION_MOVE),
Anders Carlsson's avatar
Anders Carlsson committed
215 216 217 218
		       time);
    }      
}

219 220 221 222 223 224 225 226
/**
 * gtk_drag_finish: (method)
 * @context: the drag context.
 * @success: a flag indicating whether the drop was successful
 * @del: a flag indicating whether the source should delete the
 *   original data. (This should be %TRUE for a move)
 * @time_: the timestamp from the #GtkWidget::drag-drop signal.
 */
Anders Carlsson's avatar
Anders Carlsson committed
227 228 229 230 231 232
void 
gtk_drag_finish (GdkDragContext *context,
		 gboolean        success,
		 gboolean        del,
		 guint32         time)
{
233 234 235 236 237 238 239 240 241 242 243 244
  GtkDragSourceInfo *info;
  GdkDragContext* source_context = gdk_quartz_drag_source_context ();

  if (source_context)
    {
      info = gtk_drag_get_source_info (source_context, FALSE);
      if (info)
        {
          info->success = success;
          info->delete = del;
        }
    }
Anders Carlsson's avatar
Anders Carlsson committed
245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284
}

static void
gtk_drag_dest_info_destroy (gpointer data)
{
  GtkDragDestInfo *info = data;

  g_free (info);
}

static GtkDragDestInfo *
gtk_drag_get_dest_info (GdkDragContext *context,
			gboolean        create)
{
  GtkDragDestInfo *info;
  static GQuark info_quark = 0;
  if (!info_quark)
    info_quark = g_quark_from_static_string ("gtk-dest-info");
  
  info = g_object_get_qdata (G_OBJECT (context), info_quark);
  if (!info && create)
    {
      info = g_new (GtkDragDestInfo, 1);
      info->widget = NULL;
      info->context = context;
      info->dropped = FALSE;
      g_object_set_qdata_full (G_OBJECT (context), info_quark,
			       info, gtk_drag_dest_info_destroy);
    }

  return info;
}

static GQuark dest_info_quark = 0;

static GtkDragSourceInfo *
gtk_drag_get_source_info (GdkDragContext *context,
			  gboolean        create)
{
  GtkDragSourceInfo *info;
285

Anders Carlsson's avatar
Anders Carlsson committed
286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305
  if (!dest_info_quark)
    dest_info_quark = g_quark_from_static_string ("gtk-source-info");
  
  info = g_object_get_qdata (G_OBJECT (context), dest_info_quark);
  if (!info && create)
    {
      info = g_new0 (GtkDragSourceInfo, 1);
      info->context = context;
      g_object_set_qdata (G_OBJECT (context), dest_info_quark, info);
    }

  return info;
}

static void
gtk_drag_clear_source_info (GdkDragContext *context)
{
  g_object_set_qdata (G_OBJECT (context), dest_info_quark, NULL);
}

306 307 308
/**
 * gtk_drag_get_source_widget: (method)
 * @context: a (destination side) drag context
309 310
 *
 * Returns: (transfer none):
311
 */
312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327
GtkWidget *
gtk_drag_get_source_widget (GdkDragContext *context)
{
  GtkDragSourceInfo *info;
  GdkDragContext* real_source_context = gdk_quartz_drag_source_context();

  if (!real_source_context)
    return NULL;

  info = gtk_drag_get_source_info (real_source_context, FALSE);
  if (!info)
     return NULL;

  return info->source_widget;
}

328 329 330 331
/**
 * gtk_drag_highlight: (method)
 * @widget: a widget to highlight
 */
Anders Carlsson's avatar
Anders Carlsson committed
332 333 334 335 336
void 
gtk_drag_highlight (GtkWidget  *widget)
{
  g_return_if_fail (GTK_IS_WIDGET (widget));

337
  gtk_widget_set_state_flags (widget, GTK_STATE_FLAG_DROP_ACTIVE, FALSE);
Anders Carlsson's avatar
Anders Carlsson committed
338 339
}

340 341 342 343
/**
 * gtk_drag_unhighlight: (method)
 * @widget: a widget to remove the highlight from.
 */
Anders Carlsson's avatar
Anders Carlsson committed
344 345 346 347 348
void 
gtk_drag_unhighlight (GtkWidget *widget)
{
  g_return_if_fail (GTK_IS_WIDGET (widget));

349
  gtk_widget_unset_state_flags (widget, GTK_STATE_FLAG_DROP_ACTIVE);
Anders Carlsson's avatar
Anders Carlsson committed
350 351 352 353 354 355
}

static NSWindow *
get_toplevel_nswindow (GtkWidget *widget)
{
  GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
356
  GdkWindow *window = gtk_widget_get_window (toplevel);
Anders Carlsson's avatar
Anders Carlsson committed
357
  
358 359
  if (gtk_widget_is_toplevel (toplevel) && window)
    return [gdk_quartz_window_get_nsview (window) window];
Anders Carlsson's avatar
Anders Carlsson committed
360 361 362 363 364 365 366 367 368 369
  else
    return NULL;
}

static void
register_types (GtkWidget *widget, GtkDragDestSite *site)
{
  if (site->target_list)
    {
      NSWindow *nswindow = get_toplevel_nswindow (widget);
370
      NSSet *types;
Anders Carlsson's avatar
Anders Carlsson committed
371 372 373 374 375
      NSAutoreleasePool *pool;

      if (!nswindow)
	return;

Richard Hult's avatar
Richard Hult committed
376
      pool = [[NSAutoreleasePool alloc] init];
Anders Carlsson's avatar
Anders Carlsson committed
377 378
      types = _gtk_quartz_target_list_to_pasteboard_types (site->target_list);

379
      [nswindow registerForDraggedTypes:[types allObjects]];
380 381

      [types release];
Anders Carlsson's avatar
Anders Carlsson committed
382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415
      [pool release];
    }
}

static void
gtk_drag_dest_realized (GtkWidget *widget, 
			gpointer   user_data)
{
  GtkDragDestSite *site = user_data;

  register_types (widget, site);
}

static void
gtk_drag_dest_hierarchy_changed (GtkWidget *widget,
				 GtkWidget *previous_toplevel,
				 gpointer   user_data)
{
  GtkDragDestSite *site = user_data;

  register_types (widget, site);
}

static void
gtk_drag_dest_site_destroy (gpointer data)
{
  GtkDragDestSite *site = data;
    
  if (site->target_list)
    gtk_target_list_unref (site->target_list);

  g_free (site);
}

416 417 418 419
/**
 * gtk_drag_dest_set: (method)
 * @widget: a #GtkWidget
 * @flags: which types of default drag behavior to use
420
 * @targets: (allow-none) (array length=n_targets): a pointer to an array of #GtkTargetEntrys
421 422 423 424 425 426
 *     indicating the drop types that this @widget will accept, or %NULL.
 *     Later you can access the list with gtk_drag_dest_get_target_list()
 *     and gtk_drag_dest_find_target().
 * @n_targets: the number of entries in @targets
 * @actions: a bitmask of possible actions for a drop onto this @widget.
 */
Anders Carlsson's avatar
Anders Carlsson committed
427 428 429 430 431 432 433
void 
gtk_drag_dest_set (GtkWidget            *widget,
		   GtkDestDefaults       flags,
		   const GtkTargetEntry *targets,
		   gint                  n_targets,
		   GdkDragAction         actions)
{
434
  GtkDragDestSite *old_site, *site;
Anders Carlsson's avatar
Anders Carlsson committed
435 436 437

  g_return_if_fail (GTK_IS_WIDGET (widget));

438 439
  old_site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");

Anders Carlsson's avatar
Anders Carlsson committed
440 441 442 443 444 445 446 447 448
  site = g_new (GtkDragDestSite, 1);
  site->flags = flags;
  site->have_drag = FALSE;
  if (targets)
    site->target_list = gtk_target_list_new (targets, n_targets);
  else
    site->target_list = NULL;
  site->actions = actions;

449 450 451 452 453
  if (old_site)
    site->track_motion = old_site->track_motion;
  else
    site->track_motion = FALSE;

Paul Davis's avatar
Paul Davis committed
454 455
  gtk_drag_dest_unset (widget);

456
  if (gtk_widget_get_realized (widget))
Anders Carlsson's avatar
Anders Carlsson committed
457 458 459 460
    gtk_drag_dest_realized (widget, site);

  g_signal_connect (widget, "realize",
		    G_CALLBACK (gtk_drag_dest_realized), site);
461
  g_signal_connect (widget, "hierarchy-changed",
Anders Carlsson's avatar
Anders Carlsson committed
462 463 464 465 466 467
		    G_CALLBACK (gtk_drag_dest_hierarchy_changed), site);

  g_object_set_data_full (G_OBJECT (widget), I_("gtk-drag-dest"),
			  site, gtk_drag_dest_site_destroy);
}

468 469 470 471
/**
 * gtk_drag_dest_unset: (method)
 * @widget: a #GtkWidget
 */
Anders Carlsson's avatar
Anders Carlsson committed
472 473 474
void 
gtk_drag_dest_unset (GtkWidget *widget)
{
475 476
  GtkDragDestSite *old_site;

Anders Carlsson's avatar
Anders Carlsson committed
477 478
  g_return_if_fail (GTK_IS_WIDGET (widget));

479 480 481 482 483 484 485 486 487 488 489
  old_site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
  if (old_site)
    {
      g_signal_handlers_disconnect_by_func (widget,
                                            gtk_drag_dest_realized,
                                            old_site);
      g_signal_handlers_disconnect_by_func (widget,
                                            gtk_drag_dest_hierarchy_changed,
                                            old_site);
    }

Anders Carlsson's avatar
Anders Carlsson committed
490 491 492
  g_object_set_data (G_OBJECT (widget), I_("gtk-drag-dest"), NULL);
}

493 494 495 496
/**
 * gtk_drag_dest_get_target_list: (method)
 * @widget: a #GtkWidget
 */
Anders Carlsson's avatar
Anders Carlsson committed
497 498 499 500 501 502 503 504 505 506 507 508
GtkTargetList*
gtk_drag_dest_get_target_list (GtkWidget *widget)
{
  GtkDragDestSite *site;

  g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
  
  site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");

  return site ? site->target_list : NULL;  
}

509 510
/**
 * gtk_drag_dest_set_target_list: (method)
511
 * @widget: a #GtkWidget that’s a drag destination
512 513
 * @target_list: (allow-none): list of droppable targets, or %NULL for none
 */
Anders Carlsson's avatar
Anders Carlsson committed
514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541
void
gtk_drag_dest_set_target_list (GtkWidget      *widget,
                               GtkTargetList  *target_list)
{
  GtkDragDestSite *site;

  g_return_if_fail (GTK_IS_WIDGET (widget));
  
  site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
  
  if (!site)
    {
      g_warning ("Can't set a target list on a widget until you've called gtk_drag_dest_set() "
                 "to make the widget into a drag destination");
      return;
    }

  if (target_list)
    gtk_target_list_ref (target_list);
  
  if (site->target_list)
    gtk_target_list_unref (site->target_list);

  site->target_list = target_list;

  register_types (widget, site);
}

542 543
/**
 * gtk_drag_dest_add_text_targets: (method)
544
 * @widget: a #GtkWidget that’s a drag destination
545
 */
Anders Carlsson's avatar
Anders Carlsson committed
546 547 548 549 550 551 552 553 554 555 556 557 558 559 560
void
gtk_drag_dest_add_text_targets (GtkWidget *widget)
{
  GtkTargetList *target_list;

  target_list = gtk_drag_dest_get_target_list (widget);
  if (target_list)
    gtk_target_list_ref (target_list);
  else
    target_list = gtk_target_list_new (NULL, 0);
  gtk_target_list_add_text_targets (target_list, 0);
  gtk_drag_dest_set_target_list (widget, target_list);
  gtk_target_list_unref (target_list);
}

561 562 563

/**
 * gtk_drag_dest_add_image_targets: (method)
564
 * @widget: a #GtkWidget that’s a drag destination
565
 */
Anders Carlsson's avatar
Anders Carlsson committed
566 567 568 569 570 571 572 573 574 575 576 577 578 579 580
void
gtk_drag_dest_add_image_targets (GtkWidget *widget)
{
  GtkTargetList *target_list;

  target_list = gtk_drag_dest_get_target_list (widget);
  if (target_list)
    gtk_target_list_ref (target_list);
  else
    target_list = gtk_target_list_new (NULL, 0);
  gtk_target_list_add_image_targets (target_list, 0, FALSE);
  gtk_drag_dest_set_target_list (widget, target_list);
  gtk_target_list_unref (target_list);
}

581 582
/**
 * gtk_drag_dest_add_uri_targets: (method)
583
 * @widget: a #GtkWidget that’s a drag destination
584
 */
Anders Carlsson's avatar
Anders Carlsson committed
585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618
void
gtk_drag_dest_add_uri_targets (GtkWidget *widget)
{
  GtkTargetList *target_list;

  target_list = gtk_drag_dest_get_target_list (widget);
  if (target_list)
    gtk_target_list_ref (target_list);
  else
    target_list = gtk_target_list_new (NULL, 0);
  gtk_target_list_add_uri_targets (target_list, 0);
  gtk_drag_dest_set_target_list (widget, target_list);
  gtk_target_list_unref (target_list);
}

static void
prepend_and_ref_widget (GtkWidget *widget,
			gpointer   data)
{
  GSList **slist_p = data;

  *slist_p = g_slist_prepend (*slist_p, g_object_ref (widget));
}

static void
gtk_drag_find_widget (GtkWidget       *widget,
		      GtkDragFindData *data)
{
  GtkAllocation new_allocation;
  gint allocation_to_window_x = 0;
  gint allocation_to_window_y = 0;
  gint x_offset = 0;
  gint y_offset = 0;

619
  if (data->found || !gtk_widget_get_mapped (widget) || !gtk_widget_get_sensitive (widget))
Anders Carlsson's avatar
Anders Carlsson committed
620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635
    return;

  /* Note that in the following code, we only count the
   * position as being inside a WINDOW widget if it is inside
   * widget->window; points that are outside of widget->window
   * but within the allocation are not counted. This is consistent
   * with the way we highlight drag targets.
   *
   * data->x,y are relative to widget->parent->window (if
   * widget is not a toplevel, widget->window otherwise).
   * We compute the allocation of widget in the same coordinates,
   * clipping to widget->window, and all intermediate
   * windows. If data->x,y is inside that, then we translate
   * our coordinates to be relative to widget->window and
   * recurse.
   */  
636
  gtk_widget_get_allocation (widget, &new_allocation);
Anders Carlsson's avatar
Anders Carlsson committed
637

638
  if (gtk_widget_get_parent (widget))
Anders Carlsson's avatar
Anders Carlsson committed
639 640
    {
      gint tx, ty;
641 642 643 644 645
      GdkWindow *window = gtk_widget_get_window (widget);
      GdkWindow *parent_window;
      GtkAllocation allocation;

      parent_window = gtk_widget_get_window (gtk_widget_get_parent (widget));
Anders Carlsson's avatar
Anders Carlsson committed
646 647 648 649

      /* Compute the offset from allocation-relative to
       * window-relative coordinates.
       */
650 651 652
      gtk_widget_get_allocation (widget, &allocation);
      allocation_to_window_x = allocation.x;
      allocation_to_window_y = allocation.y;
Anders Carlsson's avatar
Anders Carlsson committed
653

654
      if (gtk_widget_get_has_window (widget))
Anders Carlsson's avatar
Anders Carlsson committed
655 656 657 658 659 660 661 662 663 664 665 666 667
	{
	  /* The allocation is relative to the parent window for
	   * window widgets, not to widget->window.
	   */
          gdk_window_get_position (window, &tx, &ty);
	  
          allocation_to_window_x -= tx;
          allocation_to_window_y -= ty;
	}

      new_allocation.x = 0 + allocation_to_window_x;
      new_allocation.y = 0 + allocation_to_window_y;
      
668
      while (window && window != parent_window)
Anders Carlsson's avatar
Anders Carlsson committed
669 670 671
	{
	  GdkRectangle window_rect = { 0, 0, 0, 0 };
	  
672 673
          window_rect.width = gdk_window_get_width (window);
          window_rect.height = gdk_window_get_height (window);
Anders Carlsson's avatar
Anders Carlsson committed
674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709

	  gdk_rectangle_intersect (&new_allocation, &window_rect, &new_allocation);

	  gdk_window_get_position (window, &tx, &ty);
	  new_allocation.x += tx;
	  x_offset += tx;
	  new_allocation.y += ty;
	  y_offset += ty;
	  
	  window = gdk_window_get_parent (window);
	}

      if (!window)		/* Window and widget heirarchies didn't match. */
	return;
    }

  if (data->toplevel ||
      ((data->x >= new_allocation.x) && (data->y >= new_allocation.y) &&
       (data->x < new_allocation.x + new_allocation.width) && 
       (data->y < new_allocation.y + new_allocation.height)))
    {
      /* First, check if the drag is in a valid drop site in
       * one of our children 
       */
      if (GTK_IS_CONTAINER (widget))
	{
	  GtkDragFindData new_data = *data;
	  GSList *children = NULL;
	  GSList *tmp_list;
	  
	  new_data.x -= x_offset;
	  new_data.y -= y_offset;
	  new_data.found = FALSE;
	  new_data.toplevel = FALSE;
	  
	  /* need to reference children temporarily in case the
710
	   * ::drag-motion/::drag-drop callbacks change the widget hierarchy.
Anders Carlsson's avatar
Anders Carlsson committed
711 712 713 714
	   */
	  gtk_container_forall (GTK_CONTAINER (widget), prepend_and_ref_widget, &children);
	  for (tmp_list = children; tmp_list; tmp_list = tmp_list->next)
	    {
715
	      if (!new_data.found && gtk_widget_is_drawable (tmp_list->data))
Anders Carlsson's avatar
Anders Carlsson committed
716 717 718 719 720 721 722 723 724
		gtk_drag_find_widget (tmp_list->data, &new_data);
	      g_object_unref (tmp_list->data);
	    }
	  g_slist_free (children);
	  
	  data->found = new_data.found;
	}

      /* If not, and this widget is registered as a drop site, check to
725
       * emit "drag-motion" to check if we are actually in
Anders Carlsson's avatar
Anders Carlsson committed
726 727 728 729 730 731 732 733 734 735
       * a drop site.
       */
      if (!data->found &&
	  g_object_get_data (G_OBJECT (widget), "gtk-drag-dest"))
	{
	  data->found = data->callback (widget,
					data->context,
					data->x - x_offset - allocation_to_window_x,
					data->y - y_offset - allocation_to_window_y,
					data->time);
736
	  /* If so, send a "drag-leave" to the last widget */
Anders Carlsson's avatar
Anders Carlsson committed
737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761
	  if (data->found)
	    {
	      if (data->info->widget && data->info->widget != widget)
		{
		  gtk_drag_dest_leave (data->info->widget, data->context, data->time);
		}
	      data->info->widget = widget;
	    }
	}
    }
}

static void  
gtk_drag_dest_leave (GtkWidget      *widget,
		     GdkDragContext *context,
		     guint           time)
{
  GtkDragDestSite *site;

  site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
  g_return_if_fail (site != NULL);

  if ((site->flags & GTK_DEST_DEFAULT_HIGHLIGHT) && site->have_drag)
    gtk_drag_unhighlight (widget);
  
762 763
  if (!(site->flags & GTK_DEST_DEFAULT_MOTION) || site->have_drag ||
      site->track_motion)
764
    g_signal_emit_by_name (widget, "drag-leave", context, time);
Anders Carlsson's avatar
Anders Carlsson committed
765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782
  
  site->have_drag = FALSE;
}

static gboolean
gtk_drag_dest_motion (GtkWidget	     *widget,
		      GdkDragContext *context,
		      gint            x,
		      gint            y,
		      guint           time)
{
  GtkDragDestSite *site;
  GdkDragAction action = 0;
  gboolean retval;

  site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
  g_return_val_if_fail (site != NULL, FALSE);

783
  if (site->track_motion || site->flags & GTK_DEST_DEFAULT_MOTION)
Anders Carlsson's avatar
Anders Carlsson committed
784
    {
785 786
      if (gdk_drag_context_get_suggested_action (context) & site->actions)
	action = gdk_drag_context_get_suggested_action (context);
Anders Carlsson's avatar
Anders Carlsson committed
787 788 789 790 791 792 793 794 795 796 797 798 799 800 801
      
      if (action && gtk_drag_dest_find_target (widget, context, NULL))
	{
	  if (!site->have_drag)
	    {
	      site->have_drag = TRUE;
	      if (site->flags & GTK_DEST_DEFAULT_HIGHLIGHT)
		gtk_drag_highlight (widget);
	    }
	  
	  gdk_drag_status (context, action, time);
	}
      else
	{
	  gdk_drag_status (context, 0, time);
802 803
	  if (!site->track_motion)
	    return TRUE;
Anders Carlsson's avatar
Anders Carlsson committed
804 805 806
	}
    }

807
  g_signal_emit_by_name (widget, "drag-motion",
Anders Carlsson's avatar
Anders Carlsson committed
808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845
			 context, x, y, time, &retval);

  return (site->flags & GTK_DEST_DEFAULT_MOTION) ? TRUE : retval;
}

static gboolean
gtk_drag_dest_drop (GtkWidget	     *widget,
		    GdkDragContext   *context,
		    gint              x,
		    gint              y,
		    guint             time)
{
  GtkDragDestSite *site;
  GtkDragDestInfo *info;
  gboolean retval;

  site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
  g_return_val_if_fail (site != NULL, FALSE);

  info = gtk_drag_get_dest_info (context, FALSE);
  g_return_val_if_fail (info != NULL, FALSE);

  info->drop_x = x;
  info->drop_y = y;

  if (site->flags & GTK_DEST_DEFAULT_DROP)
    {
      GdkAtom target = gtk_drag_dest_find_target (widget, context, NULL);

      if (target == GDK_NONE)
	{
	  gtk_drag_finish (context, FALSE, FALSE, time);
	  return TRUE;
	}
      else
	gtk_drag_get_data (widget, context, target, time);
    }
  
846
  g_signal_emit_by_name (widget, "drag-drop",
Anders Carlsson's avatar
Anders Carlsson committed
847 848 849 850 851
			 context, x, y, time, &retval);

  return (site->flags & GTK_DEST_DEFAULT_DROP) ? TRUE : retval;
}

852 853
/**
 * gtk_drag_dest_set_track_motion: (method)
854
 * @widget: a #GtkWidget that’s a drag destination
855 856
 * @track_motion: whether to accept all targets
 */
857 858 859 860
void
gtk_drag_dest_set_track_motion (GtkWidget *widget,
				gboolean   track_motion)
{
861 862
  GtkDragDestSite *site;

863 864
  g_return_if_fail (GTK_IS_WIDGET (widget));

865 866 867 868 869
  site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
  
  g_return_if_fail (site != NULL);

  site->track_motion = track_motion != FALSE;
870 871
}

872 873
/**
 * gtk_drag_dest_get_track_motion: (method)
874
 * @widget: a #GtkWidget that’s a drag destination
875
 */
876 877 878
gboolean
gtk_drag_dest_get_track_motion (GtkWidget *widget)
{
879 880
  GtkDragDestSite *site;

881 882
  g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);

883 884 885 886
  site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");

  if (site)
    return site->track_motion;
887 888 889 890

  return FALSE;
}

Anders Carlsson's avatar
Anders Carlsson committed
891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937
void
_gtk_drag_dest_handle_event (GtkWidget *toplevel,
			     GdkEvent  *event)
{
  GtkDragDestInfo *info;
  GdkDragContext *context;

  g_return_if_fail (toplevel != NULL);
  g_return_if_fail (event != NULL);

  context = event->dnd.context;

  info = gtk_drag_get_dest_info (context, TRUE);

  /* Find the widget for the event */
  switch (event->type)
    {
    case GDK_DRAG_ENTER:
      break;

    case GDK_DRAG_LEAVE:
      if (info->widget)
	{
	  gtk_drag_dest_leave (info->widget, context, event->dnd.time);
	  info->widget = NULL;
	}
      break;

    case GDK_DRAG_MOTION:
    case GDK_DROP_START:
      {
	GtkDragFindData data;
	gint tx, ty;

	if (event->type == GDK_DROP_START)
	  {
	    info->dropped = TRUE;
	    /* We send a leave here so that the widget unhighlights
	     * properly.
	     */
	    if (info->widget)
	      {
		gtk_drag_dest_leave (info->widget, context, event->dnd.time);
		info->widget = NULL;
	      }
	  }

938
	gdk_window_get_position (gtk_widget_get_window (toplevel), &tx, &ty);
Anders Carlsson's avatar
Anders Carlsson committed
939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973
	
	data.x = event->dnd.x_root - tx;
	data.y = event->dnd.y_root - ty;
 	data.context = context;
	data.info = info;
	data.found = FALSE;
	data.toplevel = TRUE;
	data.callback = (event->type == GDK_DRAG_MOTION) ?
	  gtk_drag_dest_motion : gtk_drag_dest_drop;
	data.time = event->dnd.time;
	
	gtk_drag_find_widget (toplevel, &data);

	if (info->widget && !data.found)
	  {
	    gtk_drag_dest_leave (info->widget, context, event->dnd.time);
	    info->widget = NULL;
	  }

	/* Send a reply.
	 */
	if (event->type == GDK_DRAG_MOTION)
	  {
	    if (!data.found)
	      gdk_drag_status (context, 0, event->dnd.time);
	  }

	break;
      default:
	g_assert_not_reached ();
      }
    }
}


974 975 976 977 978 979
/**
 * gtk_drag_dest_find_target: (method)
 * @widget: drag destination widget
 * @context: drag context
 * @target_list: (allow-none): list of droppable targets, or %NULL to use
 *    gtk_drag_dest_get_target_list (@widget).
980 981
 *
 * Returns: (transfer none):
982
 */
Anders Carlsson's avatar
Anders Carlsson committed
983 984 985 986 987
GdkAtom
gtk_drag_dest_find_target (GtkWidget      *widget,
                           GdkDragContext *context,
                           GtkTargetList  *target_list)
{
988 989
  id <NSDraggingInfo> dragging_info;
  NSPasteboard *pasteboard;
Anders Carlsson's avatar
Anders Carlsson committed
990 991 992 993 994 995 996 997
  GtkWidget *source_widget;
  GList *tmp_target;
  GList *tmp_source = NULL;
  GList *source_targets;

  g_return_val_if_fail (GTK_IS_WIDGET (widget), GDK_NONE);
  g_return_val_if_fail (GDK_IS_DRAG_CONTEXT (context), GDK_NONE);

998 999 1000
  dragging_info = gdk_quartz_drag_context_get_dragging_info_libgtk_only (context);
  pasteboard = [dragging_info draggingPasteboard];

Anders Carlsson's avatar
Anders Carlsson committed
1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036
  source_widget = gtk_drag_get_source_widget (context);

  if (target_list == NULL)
    target_list = gtk_drag_dest_get_target_list (widget);
  
  if (target_list == NULL)
    return GDK_NONE;

  source_targets = _gtk_quartz_pasteboard_types_to_atom_list ([pasteboard types]);
  tmp_target = target_list->list;
  while (tmp_target)
    {
      GtkTargetPair *pair = tmp_target->data;
      tmp_source = source_targets;
      while (tmp_source)
	{
	  if (tmp_source->data == GUINT_TO_POINTER (pair->target))
	    {
	      if ((!(pair->flags & GTK_TARGET_SAME_APP) || source_widget) &&
		  (!(pair->flags & GTK_TARGET_SAME_WIDGET) || (source_widget == widget)))
		{
		  g_list_free (source_targets);
		  return pair->target;
		}
	      else
		break;
	    }
	  tmp_source = tmp_source->next;
	}
      tmp_target = tmp_target->next;
    }

  g_list_free (source_targets);
  return GDK_NONE;
}

1037 1038 1039
static gboolean
gtk_drag_begin_idle (gpointer arg)
{
1040
  NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
1041 1042 1043 1044 1045 1046
  GdkDragContext* context = (GdkDragContext*) arg;
  GtkDragSourceInfo* info = gtk_drag_get_source_info (context, FALSE);
  NSWindow *nswindow;
  NSPasteboard *pasteboard;
  GtkDragSourceOwner *owner;
  NSPoint point;
1047
  NSSet *types;
1048
  NSImage *drag_image;
1049 1050 1051 1052 1053 1054

  g_assert (info != NULL);

  pasteboard = [NSPasteboard pasteboardWithName:NSDragPboard];
  owner = [[GtkDragSourceOwner alloc] initWithInfo:info];

1055 1056 1057 1058
  types = _gtk_quartz_target_list_to_pasteboard_types (info->target_list);

  [pasteboard declareTypes:[types allObjects] owner:owner];

1059
  [owner release];
1060
  [types release];
1061 1062

  if ((nswindow = get_toplevel_nswindow (info->source_widget)) == NULL)
1063
     return G_SOURCE_REMOVE;
1064 1065 1066 1067 1068 1069 1070
  
  /* Ref the context. It's unreffed when the drag has been aborted */
  g_object_ref (info->context);

  /* FIXME: If the event isn't a mouse event, use the global cursor position instead */
  point = [info->nsevent locationInWindow];

1071 1072
  drag_image = _gtk_quartz_create_image_from_surface (info->icon_surface);

1073 1074 1075
  if (drag_image == NULL)
    {
      g_object_unref (info->context);
1076
      return G_SOURCE_REMOVE;
1077
    }
1078

1079
  point.x -= info->hot_x;
1080
  point.y -= [drag_image size].height - info->hot_y;
1081

1082
  [nswindow dragImage:drag_image
1083
                   at:point
1084
               offset:NSZeroSize
1085 1086 1087 1088 1089 1090
                event:info->nsevent
           pasteboard:pasteboard
               source:nswindow
            slideBack:YES];

  [info->nsevent release];
1091
  [drag_image release];
1092

1093 1094
  [pool release];

1095
  return G_SOURCE_REMOVE;
1096
}
1097
/* Fake protocol to let us call GdkNSView gdkWindow without including
1098
 * gdk/GdkNSView.h (which we can’t because it pulls in the internal-only
1099 1100 1101 1102 1103
 * gdkwindow.h).
 */
@protocol GdkNSView
- (GdkWindow *)gdkWindow;
@end
1104

1105
GdkDragContext *
Anders Carlsson's avatar
Anders Carlsson committed
1106
gtk_drag_begin_internal (GtkWidget         *widget,
1107
			 GtkImageDefinition *icon,
Anders Carlsson's avatar
Anders Carlsson committed
1108 1109 1110
			 GtkTargetList     *target_list,
			 GdkDragAction      actions,
			 gint               button,
1111 1112 1113
			 const GdkEvent    *event,
			 int               x,
			 int               y)
Anders Carlsson's avatar
Anders Carlsson committed
1114 1115
{
  GtkDragSourceInfo *info;
1116
  GdkDevice *pointer;
1117
  GdkWindow *window;
1118
  GdkDragContext *context;
1119 1120 1121 1122 1123 1124
  NSWindow *nswindow = get_toplevel_nswindow (widget);
  NSPoint point = {0, 0};
  double time = (double)g_get_real_time ();
  NSEvent *nsevent;
  NSTimeInterval nstime;

1125
  if ((x != -1 && y != -1) || event)
1126
    {
1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147
      GdkWindow *window;
      gdouble dx, dy;
      if (x != -1 && y != -1)
	{
	  GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
	  window = gtk_widget_get_window (toplevel);
	  gtk_widget_translate_coordinates (widget, toplevel, x, y, &x, &y);
	  gdk_window_get_root_coords (gtk_widget_get_window (toplevel), x, y,
							     &x, &y);
	  dx = (gdouble)x;
	  dy = (gdouble)y;
	}
      else if (event)
	{
	  if (gdk_event_get_coords (event, &dx, &dy))
	    {
	      /* We need to translate (x, y) to coordinates relative to the
	       * toplevel GdkWindow, which should be the GdkWindow backing
	       * nswindow. Then, we convert to the NSWindow coordinate system.
	       */
	      window = event->any.window;
1148
	      GdkWindow *toplevel = gdk_window_get_toplevel (window);
1149 1150 1151 1152 1153

	      while (window != toplevel)
		{
		  double old_x = dx;
		  double old_y = dy;
1154

1155 1156
		  gdk_window_coords_to_parent (window, old_x, old_y,
					       &dx, &dy);
1157
		  window = gdk_window_get_parent (window);
1158 1159 1160 1161 1162 1163
		}
	    }
	  time = (double)gdk_event_get_time (event);
	}
      point.x = dx;
      point.y = gdk_window_get_height (window) - dy;
1164
    }
1165

1166 1167
  nstime = [[NSDate dateWithTimeIntervalSince1970: time / 1000] timeIntervalSinceReferenceDate];
  nsevent = [NSEvent mouseEventWithType: NSLeftMouseDown
1168 1169 1170 1171 1172 1173 1174 1175
                      location: point
                      modifierFlags: 0
                      timestamp: nstime
                      windowNumber: [nswindow windowNumber]
                      context: [nswindow graphicsContext]
                      eventNumber: 0
                      clickCount: 1
                      pressure: 0.0 ];
1176 1177

  window = [(id<GdkNSView>)[nswindow contentView] gdkWindow];
1178
  g_return_val_if_fail (nsevent != NULL, NULL);
1179

1180
  context = gdk_drag_begin (window, g_list_copy (target_list->list));
1181
  g_return_val_if_fail (context != NULL, NULL);
Anders Carlsson's avatar
Anders Carlsson committed
1182 1183

  info = gtk_drag_get_source_info (context, TRUE);
1184 1185 1186
  info->nsevent = nsevent;
  [info->nsevent retain];

1187
  info->source_widget = g_object_ref (widget);
1188
  info->widget = g_object_ref (widget);
Anders Carlsson's avatar
Anders Carlsson committed
1189 1190 1191 1192
  info->target_list = target_list;
  gtk_target_list_ref (target_list);

  info->possible_actions = actions;
1193

1194
  g_signal_emit_by_name (widget, "drag-begin", info->context);
Anders Carlsson's avatar
Anders Carlsson committed
1195 1196 1197 1198 1199

  /* Ensure that we have an icon before we start the drag; the
   * application may have set one in ::drag_begin, or it may
   * not have set one.
   */
1200
  if (!info->icon_surface && icon)
Anders Carlsson's avatar
Anders Carlsson committed
1201
    {
1202
      switch (gtk_image_definition_get_storage_type (icon))
1203
        {
1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215
          case GTK_IMAGE_PIXBUF:
              gtk_drag_set_icon_pixbuf (context,
                                        gtk_image_definition_get_pixbuf (icon),
                                        -2, -2);
              break;
          case GTK_IMAGE_ICON_NAME:
              gtk_drag_set_icon_name (context,
                                      gtk_image_definition_get_icon_name (icon),
                                      -2, -2);
              break;
          default:
              break;
1216
        }
Anders Carlsson's avatar
Anders Carlsson committed
1217 1218
    }

1219 1220 1221 1222
  /* no image def or no supported type -> set the default */
  if (!info->icon_surface)
    gtk_drag_set_icon_default (context);

1223
  /* drag will begin in an idle handler to avoid nested run loops */
Anders Carlsson's avatar
Anders Carlsson committed
1224

1225
  g_idle_add_full (G_PRIORITY_HIGH_IDLE, gtk_drag_begin_idle, context, NULL);
Anders Carlsson's avatar
Anders Carlsson committed
1226

1227 1228
  pointer = gdk_drag_context_get_device (info->context);
  gdk_device_ungrab (pointer, 0);
1229 1230

  return context;
Anders Carlsson's avatar
Anders Carlsson committed
1231 1232
}

1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244
/**
 * gtk_drag_begin_with_coordinates: (method)
 * @widget:
 * @targets:
 * @actions:
 * @button:
 * @event:
 * @x:
 * @y:
 *
 * Returns: (transfer none):
 */
1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260
GdkDragContext *
gtk_drag_begin_with_coordinates (GtkWidget         *widget,
				 GtkTargetList     *targets,
				 GdkDragAction      actions,
				 gint               button,
				 GdkEvent          *event,
				 gint               x,
				 gint               y)
{
  g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
  g_return_val_if_fail (gtk_widget_get_realized (widget), NULL);
  g_return_val_if_fail (targets != NULL, NULL);

  return gtk_drag_begin_internal (widget, NULL, targets,
				  actions, button, event, x, y);
}
Anders Carlsson's avatar
Anders Carlsson committed
1261 1262


1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276
/**
 * gtk_drag_cancel:
 * @context: a #GdkDragContext, as e.g. returned by gtk_drag_begin_with_coordinates()
 *
 */
void
gtk_drag_cancel (GdkDragContext *context)
{
  GtkDragSourceInfo *info;

  g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));

  info = gtk_drag_get_source_info (context, FALSE);
  if (info != NULL)
Patrick Griffis's avatar
Patrick Griffis committed
1277
    gtk_drag_drop_finished (info, GTK_DRAG_RESULT_ERROR);
1278 1279
}

Anders Carlsson's avatar
Anders Carlsson committed
1280 1281

/**
1282
 * gtk_drag_set_icon_widget: (method)
Anders Carlsson's avatar
Anders Carlsson committed
1283 1284 1285 1286 1287 1288 1289
 * @context: the context for a drag. (This must be called 
          with a  context for the source side of a drag)
 * @widget: a toplevel window to use as an icon.
 * @hot_x: the X offset within @widget of the hotspot.
 * @hot_y: the Y offset within @widget of the hotspot.
 * 
 * Changes the icon for a widget to a given widget. GTK+
1290
 * will not destroy the icon, so if you don’t want
1291
 * it to persist, you should connect to the “drag-end” 
Anders Carlsson's avatar
Anders Carlsson committed
1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312
 * signal and destroy it yourself.
 **/
void 
gtk_drag_set_icon_widget (GdkDragContext    *context,
			  GtkWidget         *widget,
			  gint               hot_x,
			  gint               hot_y)
{
  g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
  g_return_if_fail (GTK_IS_WIDGET (widget));

  g_warning ("gtk_drag_set_icon_widget is not supported on Mac OS X");
}

static void
set_icon_stock_pixbuf (GdkDragContext    *context,
		       GdkPixbuf         *pixbuf,
		       gint               hot_x,
		       gint               hot_y)
{
  GtkDragSourceInfo *info;
1313 1314
  cairo_surface_t *surface;
  cairo_t *cr;
Anders Carlsson's avatar
Anders Carlsson committed
1315 1316 1317

  info = gtk_drag_get_source_info (context, FALSE);

1318
  g_object_ref (pixbuf);
Anders Carlsson's avatar
Anders Carlsson committed
1319

1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332
  surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
                                        gdk_pixbuf_get_width (pixbuf),
                                        gdk_pixbuf_get_height (pixbuf));

  cr = cairo_create (surface);
  gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0);
  cairo_paint (cr);
  cairo_destroy (cr);
  g_object_unref (pixbuf);

  cairo_surface_set_device_offset (surface, -hot_x, -hot_y);
  gtk_drag_set_icon_surface (context, surface);
  cairo_surface_destroy (surface);
Anders Carlsson's avatar
Anders Carlsson committed
1333 1334
}

1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365
void
gtk_drag_set_icon_definition (GdkDragContext     *context,
                              GtkImageDefinition *def,
                              gint                hot_x,
                              gint                hot_y)
{
  switch (gtk_image_definition_get_storage_type (def))
    {
    case GTK_IMAGE_EMPTY:
      gtk_drag_set_icon_default (context);
      break;

    case GTK_IMAGE_PIXBUF:
      gtk_drag_set_icon_pixbuf (context,
                                gtk_image_definition_get_pixbuf (def),
                                hot_x, hot_y);
      break;

    case GTK_IMAGE_ICON_NAME:
      gtk_drag_set_icon_name (context,
                              gtk_image_definition_get_icon_name (def),
                              hot_x, hot_y);
      break;

    default:
      g_warning ("FIXME: setting drag icon of type %u not implemented, using default.", gtk_image_definition_get_storage_type (def));
      gtk_drag_set_icon_default (context);
      break;
  }
}

Anders Carlsson's avatar
Anders Carlsson committed
1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384
/**
 * gtk_drag_set_icon_pixbuf:
 * @context: the context for a drag. (This must be called 
 *            with a  context for the source side of a drag)
 * @pixbuf: the #GdkPixbuf to use as the drag icon.
 * @hot_x: the X offset within @widget of the hotspot.
 * @hot_y: the Y offset within @widget of the hotspot.
 * 
 * Sets @pixbuf as the icon for a given drag.
 **/
void 
gtk_drag_set_icon_pixbuf  (GdkDragContext *context,
			   GdkPixbuf      *pixbuf,
			   gint            hot_x,
			   gint            hot_y)
{
  g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
  g_return_if_fail (GDK_IS_PIXBUF (pixbuf));

1385
  set_icon_stock_pixbuf (context, pixbuf, hot_x, hot_y);
Anders Carlsson's avatar
Anders Carlsson committed
1386 1387
}

1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406
/**
 * gtk_drag_set_icon_surface:
 * @context: the context for a drag. (This must be called
 *            with a context for the source side of a drag)
 * @surface: the surface to use as icon
 *
 * Sets @surface as the icon for a given drag. GTK+ retains
 * references for the arguments, and will release them when
 * they are no longer needed.
 *
 * To position the surface relative to the mouse, use
 * cairo_surface_set_device_offset() on @surface. The mouse
 * cursor will be positioned at the (0,0) coordinate of the
 * surface.
 **/
void
gtk_drag_set_icon_surface (GdkDragContext  *context,
                           cairo_surface_t *surface)
{
1407
  double x_offset, y_offset;
1408
  GtkDragSourceInfo *info;
1409 1410 1411 1412

  g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
  g_return_if_fail (surface != NULL);

1413
  cairo_surface_get_device_offset (surface, &x_offset, &y_offset);
1414 1415
  info = gtk_drag_get_source_info (context, FALSE);
  cairo_surface_reference (surface);
1416

1417 1418 1419 1420 1421 1422
  if (info->icon_surface)
    cairo_surface_destroy (info->icon_surface);

  info->icon_surface = surface;
  info->hot_x = -x_offset;
  info->hot_y = -y_offset;
1423 1424
}

Anders Carlsson's avatar
Anders Carlsson committed
1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454
/**
 * gtk_drag_set_icon_name:
 * @context: the context for a drag. (This must be called 
 *            with a context for the source side of a drag)
 * @icon_name: name of icon to use
 * @hot_x: the X offset of the hotspot within the icon
 * @hot_y: the Y offset of the hotspot within the icon
 * 
 * Sets the icon for a given drag from a named themed icon. See
 * the docs for #GtkIconTheme for more details. Note that the
 * size of the icon depends on the icon theme (the icon is
 * loaded at the symbolic size #GTK_ICON_SIZE_DND), thus 
 * @hot_x and @hot_y have to be used with care.
 *
 * Since: 2.8
 **/
void 
gtk_drag_set_icon_name (GdkDragContext *context,
			const gchar    *icon_name,
			gint            hot_x,
			gint            hot_y)
{
  GdkScreen *screen;
  GtkIconTheme *icon_theme;
  GdkPixbuf *pixbuf;
  gint width, height, icon_size;

  g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
  g_return_if_fail (icon_name != NULL);

1455
  screen = gdk_window_get_screen (gdk_drag_context_get_source_window (context));
Anders Carlsson's avatar
Anders Carlsson committed
1456 1457
  g_return_if_fail (screen != NULL);

1458 1459
  gtk_icon_size_lookup (GTK_ICON_SIZE_DND, &width, &height);
  icon_size = MAX (width, height);
Anders Carlsson's avatar
Anders Carlsson committed
1460 1461 1462 1463 1464 1465

  icon_theme = gtk_icon_theme_get_for_screen (screen);

  pixbuf = gtk_icon_theme_load_icon (icon_theme, icon_name,
		  		     icon_size, 0, NULL);
  if (pixbuf)
1466
    set_icon_stock_pixbuf (context, pixbuf, hot_x, hot_y);
Anders Carlsson's avatar
Anders Carlsson committed
1467 1468 1469 1470 1471
  else
    g_warning ("Cannot load drag icon from icon name %s", icon_name);
}

/**
1472
 * gtk_drag_set_icon_default: (method)
Anders Carlsson's avatar
Anders Carlsson committed
1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483
 * @context: the context for a drag. (This must be called 
             with a  context for the source side of a drag)
 * 
 * Sets the icon for a particular drag to the default
 * icon.
 **/
void 
gtk_drag_set_icon_default (GdkDragContext    *context)
{
  g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));

1484
  gtk_drag_set_icon_name (context, "text-x-generic", -2, -2);
Anders Carlsson's avatar
Anders Carlsson committed
1485 1486 1487 1488 1489
}

static void
gtk_drag_source_info_destroy (GtkDragSourceInfo *info)
{
1490 1491 1492
  NSPasteboard *pasteboard;
  NSAutoreleasePool *pool;

1493 1494
  if (info->icon_surface)
    cairo_surface_destroy (info->icon_surface);
Anders Carlsson's avatar
Anders Carlsson committed
1495

1496
  g_signal_emit_by_name (info->widget, "drag-end", 
Anders Carlsson's avatar
Anders Carlsson committed
1497 1498
			 info->context);

1499 1500 1501
  if (info->source_widget)
    g_object_unref (info->source_widget);

Anders Carlsson's avatar
Anders Carlsson committed
1502 1503 1504 1505 1506
  if (info->widget)
    g_object_unref (info->widget);

  gtk_target_list_unref (info->target_list);

1507 1508 1509 1510 1511 1512 1513 1514
  pool = [[NSAutoreleasePool alloc] init];

  /* Empty the pasteboard, so that it will not accidentally access
   * info->context after it has been destroyed.
   */
  pasteboard = [NSPasteboard pasteboardWithName: NSDragPboard];
  [pasteboard declareTypes: nil owner: nil];

1515
  [pool release];
1516

Anders Carlsson's avatar
Anders Carlsson committed
1517 1518 1519 1520
  gtk_drag_clear_source_info (info->context);
  g_object_unref (info->context);

  g_free (info);
1521
  info = NULL;
Anders Carlsson's avatar
Anders Carlsson committed
1522 1523
}

1524 1525 1526
static gboolean
drag_drop_finished_idle_cb (gpointer data)
{
1527 1528 1529
  GtkDragSourceInfo* info = (GtkDragSourceInfo*) data;
  if (info->success)
    gtk_drag_source_info_destroy (data);
1530
  return G_SOURCE_REMOVE;
1531 1532
}

Anders Carlsson's avatar
Anders Carlsson committed
1533
static void
1534 1535
gtk_drag_drop_finished (GtkDragSourceInfo *info,
                        GtkDragResult      result)
Anders Carlsson's avatar
Anders Carlsson committed
1536
{
1537 1538 1539 1540
  gboolean success = (result == GTK_DRAG_RESULT_SUCCESS);

  if (!success)
    g_signal_emit_by_name (info->source_widget, "drag-failed",
Patrick Griffis's avatar
Patrick Griffis committed
1541
                           info->context, result, &success);
1542 1543

  if (success && info->delete)
1544 1545 1546
    g_signal_emit_by_name (info->source_widget, "drag-data-delete",
                           info->context);

1547 1548 1549 1550 1551
  /* Workaround for the fact that the NS API blocks until the drag is
   * over. This way the context is still valid when returning from
   * drag_begin, even if it will still be quite useless. See bug #501588.
  */
  g_idle_add (drag_drop_finished_idle_cb, info);
Anders Carlsson's avatar
Anders Carlsson committed
1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570
}

/*************************************************************
 * _gtk_drag_source_handle_event:
 *     Called from widget event handling code on Drag events
 *     for drag sources.
 *
 *   arguments:
 *     toplevel: Toplevel widget that received the event
 *     event:
 *   results:
 *************************************************************/

void
_gtk_drag_source_handle_event (GtkWidget *widget,
			       GdkEvent  *event)
{
  GtkDragSourceInfo *info;
  GdkDragContext *context;
1571
  GtkDragResult result;
Anders Carlsson's avatar
Anders Carlsson committed
1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583

  g_return_if_fail (widget != NULL);
  g_return_if_fail (event != NULL);

  context = event->dnd.context;
  info = gtk_drag_get_source_info (context, FALSE);
  if (!info)
    return;

  switch (event->type)
    {
    case GDK_DROP_FINISHED:
1584 1585
      result = (gdk_drag_context_get_dest_window (context) != NULL) ? GTK_DRAG_RESULT_SUCCESS : GTK_DRAG_RESULT_NO_TARGET;
      gtk_drag_drop_finished (info, result);
Anders Carlsson's avatar
Anders Carlsson committed
1586 1587 1588 1589 1590 1591
      break;
    default:
      g_assert_not_reached ();
    }  
}

1592 1593 1594 1595 1596 1597 1598 1599
/**
 * gtk_drag_check_threshold: (method)
 * @widget: a #GtkWidget
 * @start_x: X coordinate of start of drag
 * @start_y: Y coordinate of start of drag
 * @current_x: current X coordinate
 * @current_y: current Y coordinate
 */
Anders Carlsson's avatar
Anders Carlsson committed
1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617
gboolean
gtk_drag_check_threshold (GtkWidget *widget,
			  gint       start_x,
			  gint       start_y,
			  gint       current_x,
			  gint       current_y)
{
  gint drag_threshold;

  g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);

  g_object_get (gtk_widget_get_settings (widget),
		"gtk-dnd-drag-threshold", &drag_threshold,
		NULL);
  
  return (ABS (current_x - start_x) > drag_threshold ||
	  ABS (current_y - start_y) > drag_threshold);
}