Pileus Git - ~andy/gtk/blob - gtk/gtkcolorswatch.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 2012 Red Hat, Inc.
   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 #include "config.h"
  21
  22 #include "gtkcolorswatch.h"
  23 #include "gtkroundedboxprivate.h"
  24 #include "gtkdnd.h"
  25 #include "gtkicontheme.h"
  26 #include "gtkmain.h"
  27 #include "gtkmenu.h"
  28 #include "gtkmenuitem.h"
  29 #include "gtkmenushell.h"
  30 #include "gtkbindings.h"
  31 #include "gtkprivate.h"
  32 #include "gtkintl.h"
  33
  34
  35 struct _GtkColorSwatchPrivate
  36 {
  37   GdkRGBA color;
  38   gdouble radius[4];
  39   gchar *icon;
  40   guint    selected         : 1;
  41   guint    has_color        : 1;
  42   guint    can_drop         : 1;
  43   guint    contains_pointer : 1;
  44 };
  45
  46 enum
  47 {
  48   PROP_ZERO,
  49   PROP_COLOR,
  50   PROP_SELECTED
  51 };
  52
  53 enum
  54 {
  55   ACTIVATE,
  56   CUSTOMIZE,
  57   LAST_SIGNAL
  58 };
  59
  60 static guint signals[LAST_SIGNAL];
  61
  62 G_DEFINE_TYPE (GtkColorSwatch, gtk_color_swatch, GTK_TYPE_DRAWING_AREA)
  63
  64 static void
  65 gtk_color_swatch_init (GtkColorSwatch *swatch)
  66 {
  67   swatch->priv = G_TYPE_INSTANCE_GET_PRIVATE (swatch,
  68                                               GTK_TYPE_COLOR_SWATCH,
  69                                               GtkColorSwatchPrivate);
  70
  71   gtk_widget_set_can_focus (GTK_WIDGET (swatch), TRUE);
  72   gtk_widget_set_events (GTK_WIDGET (swatch), GDK_BUTTON_PRESS_MASK
  73                                               | GDK_BUTTON_RELEASE_MASK
  74                                               | GDK_EXPOSURE_MASK
  75                                               | GDK_ENTER_NOTIFY_MASK
  76                                               | GDK_LEAVE_NOTIFY_MASK);
  77 }
  78
  79 static void
  80 swatch_finalize (GObject *object)
  81 {
  82   GtkColorSwatch *swatch = GTK_COLOR_SWATCH (object);
  83
  84   g_free (swatch->priv->icon);
  85
  86   G_OBJECT_CLASS (gtk_color_swatch_parent_class)->finalize (object);
  87 }
  88
  89 #define INTENSITY(r, g, b) ((r) * 0.30 + (g) * 0.59 + (b) * 0.11)
  90
  91 static gboolean
  92 swatch_draw (GtkWidget *widget,
  93              cairo_t   *cr)
  94 {
  95   GtkColorSwatch *swatch = (GtkColorSwatch*)widget;
  96   GtkRoundedBox box;
  97   gint i;
  98   gdouble width, height;
  99   GtkStyleContext *context;
 100   GtkStateFlags state;
 101   GdkRGBA bg;
 102
 103   context = gtk_widget_get_style_context (widget);
 104   state = gtk_widget_get_state_flags (widget);
 105   width = gtk_widget_get_allocated_width (widget);
 106   height = gtk_widget_get_allocated_height (widget);
 107
 108   gtk_style_context_save (context);
 109   cairo_save (cr);
 110
 111   gtk_style_context_set_state (context, state);
 112
 113   _gtk_rounded_box_init_rect (&box, 0, 0, width, height);
 114   for (i = 0; i < 4; i++)
 115     box.corner[i].horizontal = box.corner[i].vertical = swatch->priv->radius[i];
 116
 117   _gtk_rounded_box_path (&box, cr);
 118
 119   if (swatch->priv->has_color)
 120     {
 121       gdk_cairo_set_source_rgba (cr, &swatch->priv->color);
 122       cairo_fill_preserve (cr);
 123     }
 124
 125   cairo_set_source_rgb (cr, 0.4, 0.4, 0.4);
 126   cairo_set_line_width (cr, 1);
 127   cairo_stroke (cr);
 128
 129   if (gtk_widget_has_visible_focus (widget))
 130     {
 131       cairo_set_line_width (cr, 2);
 132       if (swatch->priv->has_color && INTENSITY (swatch->priv->color.red, swatch->priv->color.green, swatch->priv->color.blue) < 0.5)
 133         cairo_set_source_rgba (cr, 1., 1., 1., 0.4);
 134       else
 135         cairo_set_source_rgba (cr, 0., 0., 0., 0.4);
 136       _gtk_rounded_box_shrink (&box, 3, 3, 3, 3);
 137       _gtk_rounded_box_path (&box, cr);
 138       cairo_stroke (cr);
 139     }
 140
 141   if (swatch->priv->icon)
 142     {
 143       GdkPixbuf *pixbuf;
 144       GtkIconTheme *theme;
 145       theme = gtk_icon_theme_get_default ();
 146       pixbuf = gtk_icon_theme_load_icon (theme, "list-add-symbolic", 16,
 147                                          GTK_ICON_LOOKUP_GENERIC_FALLBACK
 148                                          | GTK_ICON_LOOKUP_USE_BUILTIN,
 149                                          NULL);
 150
 151       gtk_render_icon (context, cr, pixbuf,
 152                        (width - gdk_pixbuf_get_width (pixbuf)) / 2,
 153                        (height - gdk_pixbuf_get_height (pixbuf)) / 2);
 154       g_object_unref (pixbuf);
 155     }
 156   else  if (swatch->priv->selected)
 157     {
 158       gtk_style_context_get_background_color (context, state, &bg);
 159       cairo_new_sub_path (cr);
 160       cairo_arc (cr, width / 2, height / 2, 10, 0, 2 * G_PI);
 161       cairo_close_path (cr);
 162       gdk_cairo_set_source_rgba (cr, &bg);
 163       cairo_fill_preserve (cr);
 164       if (INTENSITY (swatch->priv->color.red, swatch->priv->color.green, swatch->priv->color.blue) > 0.5)
 165         cairo_set_source_rgba (cr, 0., 0., 0., 0.4);
 166       else
 167         cairo_set_source_rgba (cr, 1., 1., 1., 0.4);
 168       cairo_set_line_width (cr, 2);
 169       cairo_stroke (cr);
 170       gtk_style_context_set_state (context, state | GTK_STATE_FLAG_ACTIVE);
 171       gtk_render_check (context, cr, width / 2 - 5, height / 2 - 5, 10, 10);
 172     }
 173
 174   cairo_restore (cr);
 175   gtk_style_context_restore (context);
 176
 177   return FALSE;
 178 }
 179
 180 static void
 181 drag_set_color_icon (GdkDragContext *context,
 182                      const GdkRGBA  *color)
 183 {
 184   cairo_surface_t *surface;
 185   cairo_t *cr;
 186
 187   surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, 48, 32);
 188   cr = cairo_create (surface);
 189   gdk_cairo_set_source_rgba (cr, color);
 190   cairo_paint (cr);
 191
 192   cairo_surface_set_device_offset (surface, -2, -2);
 193   gtk_drag_set_icon_surface (context, surface);
 194
 195   cairo_destroy (cr);
 196   cairo_surface_destroy (surface);
 197 }
 198
 199 static void
 200 swatch_drag_begin (GtkWidget      *widget,
 201                    GdkDragContext *context)
 202 {
 203   GtkColorSwatch *swatch = GTK_COLOR_SWATCH (widget);
 204   GdkRGBA color;
 205
 206   gtk_color_swatch_get_color (swatch, &color);
 207   drag_set_color_icon (context, &color);
 208 }
 209
 210 static void
 211 swatch_drag_data_get (GtkWidget        *widget,
 212                       GdkDragContext   *context,
 213                       GtkSelectionData *selection_data,
 214                       guint             info,
 215                       guint             time)
 216 {
 217   GtkColorSwatch *swatch = GTK_COLOR_SWATCH (widget);
 218   guint16 vals[4];
 219   GdkRGBA color;
 220
 221   gtk_color_swatch_get_color (swatch, &color);
 222
 223   vals[0] = color.red * 0xffff;
 224   vals[1] = color.green * 0xffff;
 225   vals[2] = color.blue * 0xffff;
 226   vals[3] = color.alpha * 0xffff;
 227
 228   gtk_selection_data_set (selection_data,
 229                           gdk_atom_intern_static_string ("application/x-color"),
 230                           16, (guchar *)vals, 8);
 231 }
 232
 233 static void
 234 swatch_drag_data_received (GtkWidget        *widget,
 235                            GdkDragContext   *context,
 236                            gint              x,
 237                            gint              y,
 238                            GtkSelectionData *selection_data,
 239                            guint             info,
 240                            guint             time)
 241 {
 242   gint length;
 243   guint16 *vals;
 244   GdkRGBA color;
 245
 246   length = gtk_selection_data_get_length (selection_data);
 247
 248   if (length < 0)
 249     return;
 250
 251   /* We accept drops with the wrong format, since the KDE color
 252    * chooser incorrectly drops application/x-color with format 8.
 253    */
 254   if (length != 8)
 255     {
 256       g_warning ("Received invalid color data\n");
 257       return;
 258     }
 259
 260   vals = (guint16 *) gtk_selection_data_get_data (selection_data);
 261
 262   color.red   = (gdouble)vals[0] / 0xffff;
 263   color.green = (gdouble)vals[1] / 0xffff;
 264   color.blue  = (gdouble)vals[2] / 0xffff;
 265   color.alpha = (gdouble)vals[3] / 0xffff;
 266
 267   gtk_color_swatch_set_color (GTK_COLOR_SWATCH (widget), &color);
 268 }
 269
 270 static void
 271 swatch_get_property (GObject    *object,
 272                      guint       prop_id,
 273                      GValue     *value,
 274                      GParamSpec *pspec)
 275 {
 276   GtkColorSwatch *swatch = GTK_COLOR_SWATCH (object);
 277   GdkRGBA color;
 278
 279   switch (prop_id)
 280     {
 281     case PROP_COLOR:
 282       gtk_color_swatch_get_color (swatch, &color);
 283       g_value_set_boxed (value, &color);
 284       break;
 285     case PROP_SELECTED:
 286       g_value_set_boolean (value, swatch->priv->selected);
 287       break;
 288     default:
 289       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 290       break;
 291     }
 292 }
 293
 294 static void
 295 swatch_set_property (GObject      *object,
 296                      guint         prop_id,
 297                      const GValue *value,
 298                      GParamSpec   *pspec)
 299 {
 300   GtkColorSwatch *swatch = GTK_COLOR_SWATCH (object);
 301
 302   switch (prop_id)
 303     {
 304     case PROP_COLOR:
 305       gtk_color_swatch_set_color (swatch, g_value_get_boxed (value));
 306       break;
 307     case PROP_SELECTED:
 308       gtk_color_swatch_set_selected (swatch, g_value_get_boolean (value));
 309       break;
 310     default:
 311       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 312       break;
 313     }
 314 }
 315
 316 static void
 317 swatch_get_preferred_width (GtkWidget *widget,
 318                             gint      *min,
 319                             gint      *nat)
 320 {
 321   *min = *nat = 48;
 322 }
 323
 324 static void
 325 swatch_get_preferred_height (GtkWidget *widget,
 326                              gint      *min,
 327                              gint      *nat)
 328 {
 329   *min = *nat = 32;
 330 }
 331
 332 static gboolean
 333 swatch_key_press (GtkWidget   *widget,
 334                   GdkEventKey *event)
 335 {
 336   GtkColorSwatch *swatch = GTK_COLOR_SWATCH (widget);
 337
 338   if (event->keyval == GDK_KEY_space ||
 339       event->keyval == GDK_KEY_Return ||
 340       event->keyval == GDK_KEY_ISO_Enter||
 341       event->keyval == GDK_KEY_KP_Enter ||
 342       event->keyval == GDK_KEY_KP_Space)
 343     {
 344       if (swatch->priv->has_color && !swatch->priv->selected)
 345         gtk_color_swatch_set_selected (swatch, TRUE);
 346       else
 347         g_signal_emit (swatch, signals[ACTIVATE], 0);
 348       return TRUE;
 349     }
 350
 351   if (GTK_WIDGET_CLASS (gtk_color_swatch_parent_class)->key_press_event (widget, event))
 352     return TRUE;
 353
 354   return FALSE;
 355 }
 356
 357 static gboolean
 358 swatch_enter (GtkWidget        *widget,
 359               GdkEventCrossing *event)
 360 {
 361   GtkColorSwatch *swatch = GTK_COLOR_SWATCH (widget);
 362   swatch->priv->contains_pointer = TRUE;
 363   return FALSE;
 364 }
 365
 366 static gboolean
 367 swatch_leave (GtkWidget        *widget,
 368               GdkEventCrossing *event)
 369 {
 370   GtkColorSwatch *swatch = GTK_COLOR_SWATCH (widget);
 371   swatch->priv->contains_pointer = FALSE;
 372   return FALSE;
 373 }
 374
 375 static void
 376 emit_customize (GtkColorSwatch *swatch)
 377 {
 378   g_signal_emit (swatch, signals[CUSTOMIZE], 0);
 379 }
 380
 381 static void
 382 popup_position_func (GtkMenu   *menu,
 383                      gint      *x,
 384                      gint      *y,
 385                      gboolean  *push_in,
 386                      gpointer   user_data)
 387 {
 388   GtkWidget *widget;
 389   GtkRequisition req;
 390   gint root_x, root_y;
 391   GdkScreen *screen;
 392   GdkWindow *window;
 393   GdkRectangle monitor;
 394   gint monitor_num;
 395
 396   widget = GTK_WIDGET (user_data);
 397   g_return_if_fail (gtk_widget_get_realized (widget));
 398   window = gtk_widget_get_window (widget);
 399
 400   screen = gtk_widget_get_screen (widget);
 401   monitor_num = gdk_screen_get_monitor_at_window (screen, window);
 402   if (monitor_num < 0)
 403     monitor_num = 0;
 404   gtk_menu_set_monitor (menu, monitor_num);
 405
 406   gdk_window_get_origin (window, &root_x, &root_y);
 407   gtk_widget_get_preferred_size (GTK_WIDGET (menu), &req, NULL);
 408
 409   /* Put corner of menu centered on swatch */
 410   *x = root_x + gtk_widget_get_allocated_width (widget) / 2;
 411   *y = root_y + gtk_widget_get_allocated_height (widget) / 2;
 412
 413   /* Ensure sanity */
 414   gdk_screen_get_monitor_workarea (screen, monitor_num, &monitor);
 415   *x = CLAMP (*x, monitor.x, MAX (monitor.x, monitor.width - req.width));
 416   *y = CLAMP (*y, monitor.y, MAX (monitor.y, monitor.height - req.height));
 417 }
 418
 419 static void
 420 do_popup (GtkWidget      *swatch,
 421           GdkEventButton *event)
 422 {
 423   GtkWidget *menu;
 424   GtkWidget *item;
 425
 426   menu = gtk_menu_new ();
 427   item = gtk_menu_item_new_with_mnemonic (_("_Customize"));
 428   gtk_menu_attach_to_widget (GTK_MENU (menu), swatch, NULL);
 429
 430   g_signal_connect_swapped (item, "activate",
 431                             G_CALLBACK (emit_customize), swatch);
 432
 433   gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
 434
 435   gtk_widget_show_all (item);
 436
 437   if (event)
 438     gtk_menu_popup (GTK_MENU (menu), NULL, NULL,
 439                     NULL, NULL, event->button, event->time);
 440   else
 441     gtk_menu_popup (GTK_MENU (menu), NULL, NULL,
 442                     popup_position_func, swatch,
 443                     0, gtk_get_current_event_time ());
 444 }
 445
 446 static gboolean
 447 swatch_button_press (GtkWidget      *widget,
 448                      GdkEventButton *event)
 449 {
 450   GtkColorSwatch *swatch = GTK_COLOR_SWATCH (widget);
 451
 452   gtk_widget_grab_focus (GTK_WIDGET (swatch));
 453
 454   if (gdk_event_triggers_context_menu ((GdkEvent *) event))
 455     {
 456       do_popup (widget, event);
 457       return TRUE;
 458     }
 459   else if (event->button == GDK_BUTTON_PRIMARY &&
 460            swatch->priv->selected)
 461     {
 462       g_signal_emit (swatch, signals[ACTIVATE], 0);
 463       return TRUE;
 464     }
 465
 466   return FALSE;
 467 }
 468
 469 static gboolean
 470 swatch_button_release (GtkWidget      *widget,
 471                        GdkEventButton *event)
 472 {
 473   GtkColorSwatch *swatch = GTK_COLOR_SWATCH (widget);
 474
 475   gtk_widget_grab_focus (GTK_WIDGET (swatch));
 476
 477   if (event->button == GDK_BUTTON_PRIMARY &&
 478       swatch->priv->contains_pointer)
 479     {
 480       if (!swatch->priv->has_color)
 481         {
 482           g_signal_emit (swatch, signals[ACTIVATE], 0);
 483           return TRUE;
 484         }
 485       else if (!swatch->priv->selected)
 486         {
 487           gtk_color_swatch_set_selected (swatch, TRUE);
 488           return TRUE;
 489         }
 490     }
 491
 492   return FALSE;
 493 }
 494
 495 static gboolean
 496 swatch_menu (GtkWidget *swatch)
 497 {
 498   do_popup (swatch, NULL);
 499   return TRUE;
 500 }
 501
 502 static void
 503 gtk_color_swatch_class_init (GtkColorSwatchClass *class)
 504 {
 505   GtkWidgetClass *widget_class = (GtkWidgetClass *)class;
 506   GObjectClass *object_class = (GObjectClass *)class;
 507
 508   object_class->get_property = swatch_get_property;
 509   object_class->set_property = swatch_set_property;
 510   object_class->finalize = swatch_finalize;
 511
 512   widget_class->get_preferred_width = swatch_get_preferred_width;
 513   widget_class->get_preferred_height = swatch_get_preferred_height;
 514   widget_class->draw = swatch_draw;
 515   widget_class->drag_begin = swatch_drag_begin;
 516   widget_class->drag_data_get = swatch_drag_data_get;
 517   widget_class->drag_data_received = swatch_drag_data_received;
 518   widget_class->key_press_event = swatch_key_press;
 519   widget_class->popup_menu = swatch_menu;
 520   widget_class->button_press_event = swatch_button_press;
 521   widget_class->button_release_event = swatch_button_release;
 522   widget_class->enter_notify_event = swatch_enter;
 523   widget_class->leave_notify_event = swatch_leave;
 524
 525   signals[ACTIVATE] =
 526     g_signal_new ("activate",
 527                   GTK_TYPE_COLOR_SWATCH,
 528                   G_SIGNAL_RUN_FIRST,
 529                   G_STRUCT_OFFSET (GtkColorSwatchClass, activate),
 530                   NULL, NULL, NULL, G_TYPE_NONE, 0);
 531
 532   signals[CUSTOMIZE] =
 533     g_signal_new ("customize",
 534                   GTK_TYPE_COLOR_SWATCH,
 535                   G_SIGNAL_RUN_FIRST,
 536                   G_STRUCT_OFFSET (GtkColorSwatchClass, customize),
 537                   NULL, NULL, NULL, G_TYPE_NONE, 0);
 538
 539   g_object_class_install_property (object_class, PROP_COLOR,
 540       g_param_spec_boxed ("color", P_("Color"), P_("Color"),
 541                           GDK_TYPE_RGBA, GTK_PARAM_READWRITE));
 542
 543   g_object_class_install_property (object_class, PROP_SELECTED,
 544       g_param_spec_boolean ("selected", P_("Selected"), P_("Selected"),
 545                             FALSE, GTK_PARAM_READWRITE));
 546
 547   g_type_class_add_private (object_class, sizeof (GtkColorSwatchPrivate));
 548 }
 549
 550
 551 /* Public API {{{1 */
 552
 553 GtkWidget *
 554 gtk_color_swatch_new (void)
 555 {
 556   return (GtkWidget *) g_object_new (GTK_TYPE_COLOR_SWATCH, NULL);
 557 }
 558
 559 void
 560 gtk_color_swatch_set_color (GtkColorSwatch *swatch,
 561                             const GdkRGBA  *color)
 562 {
 563   static const GtkTargetEntry targets[] = {
 564     { "application/x-color", 0 }
 565   };
 566
 567   if (!swatch->priv->has_color)
 568     gtk_drag_source_set (GTK_WIDGET (swatch),
 569                          GDK_BUTTON1_MASK | GDK_BUTTON3_MASK,
 570                          targets, 1,
 571                          GDK_ACTION_COPY | GDK_ACTION_MOVE);
 572
 573   swatch->priv->has_color = TRUE;
 574   swatch->priv->color.red = color->red;
 575   swatch->priv->color.green = color->green;
 576   swatch->priv->color.blue = color->blue;
 577   swatch->priv->color.alpha = color->alpha;
 578
 579   gtk_widget_queue_draw (GTK_WIDGET (swatch));
 580   g_object_notify (G_OBJECT (swatch), "color");
 581 }
 582
 583 gboolean
 584 gtk_color_swatch_get_color (GtkColorSwatch *swatch,
 585                             GdkRGBA        *color)
 586 {
 587   if (swatch->priv->has_color)
 588     {
 589       color->red = swatch->priv->color.red;
 590       color->green = swatch->priv->color.green;
 591       color->blue = swatch->priv->color.blue;
 592       color->alpha = swatch->priv->color.alpha;
 593       return TRUE;
 594     }
 595   else
 596     {
 597       color->red = 1.0;
 598       color->green = 1.0;
 599       color->blue = 1.0;
 600       color->alpha = 1.0;
 601       return FALSE;
 602     }
 603 }
 604
 605 void
 606 gtk_color_swatch_set_corner_radii (GtkColorSwatch *swatch,
 607                                    gdouble         top_left,
 608                                    gdouble         top_right,
 609                                    gdouble         bottom_right,
 610                                    gdouble         bottom_left)
 611 {
 612   swatch->priv->radius[0] = top_left;
 613   swatch->priv->radius[1] = top_right;
 614   swatch->priv->radius[2] = bottom_right;
 615   swatch->priv->radius[3] = bottom_left;
 616
 617   gtk_widget_queue_draw (GTK_WIDGET (swatch));
 618 }
 619
 620 void
 621 gtk_color_swatch_set_selected (GtkColorSwatch *swatch,
 622                                gboolean        selected)
 623 {
 624   if (swatch->priv->selected != selected)
 625     {
 626       swatch->priv->selected = selected;
 627       gtk_widget_queue_draw (GTK_WIDGET (swatch));
 628       g_object_notify (G_OBJECT (swatch), "selected");
 629     }
 630 }
 631
 632 void
 633 gtk_color_swatch_set_icon (GtkColorSwatch *swatch,
 634                            const gchar    *icon)
 635 {
 636   swatch->priv->icon = g_strdup (icon);
 637   gtk_widget_queue_draw (GTK_WIDGET (swatch));
 638 }
 639
 640 void
 641 gtk_color_swatch_set_can_drop (GtkColorSwatch *swatch,
 642                                gboolean        can_drop)
 643 {
 644   static const GtkTargetEntry targets[] = {
 645     { "application/x-color", 0 }
 646   };
 647
 648   if (!swatch->priv->can_drop)
 649     gtk_drag_dest_set (GTK_WIDGET (swatch),
 650                        GTK_DEST_DEFAULT_HIGHLIGHT |
 651                        GTK_DEST_DEFAULT_MOTION |
 652                        GTK_DEST_DEFAULT_DROP,
 653                        targets, 1,
 654                        GDK_ACTION_COPY);
 655
 656   swatch->priv->can_drop = can_drop;
 657 }
 658
 659 /* vim:set foldmethod=marker: */