src/gtk/gtksctree.c

   1 /*
   2  * This program is based on gtkflist.c
   3  */
   4
   5 #include <stdlib.h>
   6
   7 #include "gtksctree.h"
   8 #include "sylpheed-marshal.h"
   9
  10
  11 enum {
  12         ROW_POPUP_MENU,
  13         EMPTY_POPUP_MENU,
  14         OPEN_ROW,
  15         START_DRAG,
  16         LAST_SIGNAL
  17 };
  18
  19
  20 static void gtk_sctree_class_init (GtkSCTreeClass *class);
  21 static void gtk_sctree_init (GtkSCTree *sctree);
  22
  23 static gint gtk_sctree_button_press (GtkWidget *widget, GdkEventButton *event);
  24 static gint gtk_sctree_button_release (GtkWidget *widget, GdkEventButton *event);
  25 static gint gtk_sctree_motion (GtkWidget *widget, GdkEventMotion *event);
  26 static void gtk_sctree_drag_begin (GtkWidget *widget, GdkDragContext *context);
  27 static void gtk_sctree_drag_end (GtkWidget *widget, GdkDragContext *context);
  28 static void gtk_sctree_drag_data_get (GtkWidget *widget, GdkDragContext *context,
  29                                      GtkSelectionData *data, guint info, guint time);
  30 static void gtk_sctree_drag_leave (GtkWidget *widget, GdkDragContext *context, guint time);
  31 static gboolean gtk_sctree_drag_motion (GtkWidget *widget, GdkDragContext *context,
  32                                        gint x, gint y, guint time);
  33 static gboolean gtk_sctree_drag_drop (GtkWidget *widget, GdkDragContext *context,
  34                                      gint x, gint y, guint time);
  35 static void gtk_sctree_drag_data_received (GtkWidget *widget, GdkDragContext *context,
  36                                           gint x, gint y, GtkSelectionData *data,
  37                                           guint info, guint time);
  38
  39 static void gtk_sctree_clear (GtkCList *clist);
  40 static void gtk_sctree_collapse (GtkCTree *ctree, GtkCTreeNode *node);
  41
  42 static void tree_sort (GtkCTree *ctree, GtkCTreeNode  *node, gpointer data);
  43 void gtk_sctree_sort_node (GtkCTree *ctree, GtkCTreeNode *node);
  44 void gtk_sctree_sort_recursive (GtkCTree *ctree, GtkCTreeNode *node);
  45
  46 static void gtk_ctree_link (GtkCTree *ctree,
  47                         GtkCTreeNode  *node,
  48                         GtkCTreeNode  *parent,
  49                         GtkCTreeNode  *sibling,
  50                         gboolean       update_focus_row);
  51
  52 static void gtk_ctree_unlink (GtkCTree      *ctree,
  53                         GtkCTreeNode  *node,
  54                         gboolean       update_focus_row);
  55
  56 static void tree_update_level (GtkCTree      *ctree,
  57                         GtkCTreeNode  *node,
  58                         gpointer       data);
  59
  60 static GtkCTreeNode * gtk_ctree_last_visible (GtkCTree     *ctree,
  61                                               GtkCTreeNode *node);
  62
  63 static GtkCTreeClass *parent_class;
  64
  65 static guint sctree_signals[LAST_SIGNAL];
  66
  67
  68 /**
  69  * gtk_sctree_get_type:
  70  * @void:
  71  *
  72  * Creates the GtkSCTree class and its type information
  73  *
  74  * Return value: The type ID for GtkSCTreeClass
  75  **/
  76 GType
  77 gtk_sctree_get_type (void)
  78 {
  79         static GType sctree_type = 0;
  80
  81         if (!sctree_type) {
  82                 GTypeInfo sctree_info = {
  83                         sizeof (GtkSCTreeClass),
  84
  85                         (GBaseInitFunc) NULL,
  86                         (GBaseFinalizeFunc) NULL,
  87
  88                         (GClassInitFunc) gtk_sctree_class_init,
  89                         (GClassFinalizeFunc) NULL,
  90                         NULL,   /* class_data */
  91
  92                         sizeof (GtkSCTree),
  93                         0,      /* n_preallocs */
  94                         (GInstanceInitFunc) gtk_sctree_init,
  95                 };
  96
  97                 sctree_type = g_type_register_static (GTK_TYPE_CTREE, "GtkSCTree", &sctree_info, (GTypeFlags)0);
  98         }
  99
 100         return sctree_type;
 101 }
 102
 103 /* Standard class initialization function */
 104 static void
 105 gtk_sctree_class_init (GtkSCTreeClass *klass)
 106 {
 107         GtkObjectClass *object_class;
 108         GtkWidgetClass *widget_class;
 109         GtkCListClass *clist_class;
 110         GtkCTreeClass *ctree_class;
 111
 112         object_class = (GtkObjectClass *) klass;
 113         widget_class = (GtkWidgetClass *) klass;
 114         clist_class = (GtkCListClass *) klass;
 115         ctree_class = (GtkCTreeClass *) klass;
 116
 117         parent_class = gtk_type_class (gtk_ctree_get_type ());
 118
 119         sctree_signals[ROW_POPUP_MENU] =
 120                 g_signal_new ("row_popup_menu",
 121                               G_TYPE_FROM_CLASS (klass),
 122                               G_SIGNAL_RUN_FIRST,
 123                               G_STRUCT_OFFSET (GtkSCTreeClass, row_popup_menu),
 124                               NULL, NULL,
 125                               sylpheed_marshal_VOID__POINTER,
 126                               G_TYPE_NONE, 1,
 127                               GDK_TYPE_EVENT);
 128         sctree_signals[EMPTY_POPUP_MENU] =
 129                 g_signal_new ("empty_popup_menu",
 130                               G_TYPE_FROM_CLASS (klass),
 131                               G_SIGNAL_RUN_FIRST,
 132                               G_STRUCT_OFFSET (GtkSCTreeClass, empty_popup_menu),
 133                               NULL, NULL,
 134                               sylpheed_marshal_VOID__POINTER,
 135                               G_TYPE_NONE, 1,
 136                               GDK_TYPE_EVENT);
 137         sctree_signals[OPEN_ROW] =
 138                 g_signal_new ("open_row",
 139                               G_TYPE_FROM_CLASS (klass),
 140                               G_SIGNAL_RUN_FIRST,
 141                               G_STRUCT_OFFSET (GtkSCTreeClass, open_row),
 142                               NULL, NULL,
 143                               g_cclosure_marshal_VOID__VOID,
 144                               G_TYPE_NONE, 0);
 145         sctree_signals[START_DRAG] =
 146                 g_signal_new ("start_drag",
 147                               G_TYPE_FROM_CLASS (klass),
 148                               G_SIGNAL_RUN_FIRST,
 149                               G_STRUCT_OFFSET (GtkSCTreeClass, start_drag),
 150                               NULL, NULL,
 151                               sylpheed_marshal_VOID__INT_POINTER,
 152                               G_TYPE_NONE, 2,
 153                               G_TYPE_INT,
 154                               GDK_TYPE_EVENT);
 155
 156         /* gtk_object_class_add_signals (object_class, sctree_signals, LAST_SIGNAL); */
 157
 158         clist_class->clear = gtk_sctree_clear;
 159         ctree_class->tree_collapse = gtk_sctree_collapse;
 160
 161         widget_class->button_press_event = gtk_sctree_button_press;
 162         widget_class->button_release_event = gtk_sctree_button_release;
 163         widget_class->motion_notify_event = gtk_sctree_motion;
 164         widget_class->drag_begin = gtk_sctree_drag_begin;
 165         widget_class->drag_end = gtk_sctree_drag_end;
 166         widget_class->drag_data_get = gtk_sctree_drag_data_get;
 167         widget_class->drag_leave = gtk_sctree_drag_leave;
 168         widget_class->drag_motion = gtk_sctree_drag_motion;
 169         widget_class->drag_drop = gtk_sctree_drag_drop;
 170         widget_class->drag_data_received = gtk_sctree_drag_data_received;
 171 }
 172
 173 /* Standard object initialization function */
 174 static void
 175 gtk_sctree_init (GtkSCTree *sctree)
 176 {
 177         sctree->anchor_row = NULL;
 178
 179         /* GtkCTree does not specify pointer motion by default */
 180         gtk_widget_add_events (GTK_WIDGET (sctree), GDK_POINTER_MOTION_MASK);
 181         gtk_widget_add_events (GTK_WIDGET (sctree), GDK_POINTER_MOTION_MASK);
 182 }
 183
 184 /* Get information the specified row is selected. */
 185
 186 static gboolean
 187 row_is_selected(GtkSCTree *sctree, gint row)
 188 {
 189         GtkCListRow *clist_row;
 190         clist_row =  g_list_nth (GTK_CLIST(sctree)->row_list, row)->data;
 191         return clist_row ? clist_row->state == GTK_STATE_SELECTED : FALSE;
 192 }
 193
 194 /* Selects the rows between the anchor to the specified row, inclusive.  */
 195 static void
 196 select_range (GtkSCTree *sctree, gint row)
 197 {
 198         gint prev_row;
 199         gint min, max;
 200         gint i;
 201
 202         if (sctree->anchor_row == NULL) {
 203                 prev_row = row;
 204                 sctree->anchor_row = gtk_ctree_node_nth(GTK_CTREE(sctree), row);
 205         } else
 206                 prev_row = g_list_position(GTK_CLIST(sctree)->row_list,
 207                                            (GList *)sctree->anchor_row);
 208
 209         if (row < prev_row) {
 210                 min = row;
 211                 max = prev_row;
 212                 GTK_CLIST(sctree)->focus_row = max;
 213         } else {
 214                 min = prev_row;
 215                 max = row;
 216         }
 217         for (i = min; i <= max; i++)
 218                 gtk_clist_select_row (GTK_CLIST (sctree), i, -1);
 219 }
 220
 221 /* Handles row selection according to the specified modifier state */
 222 static void
 223 select_row (GtkSCTree *sctree, gint row, gint col, guint state)
 224 {
 225         gboolean range, additive;
 226         g_return_if_fail (sctree != NULL);
 227         g_return_if_fail (GTK_IS_SCTREE (sctree));
 228
 229         range = ((state & GDK_SHIFT_MASK) != 0) &&
 230                 (GTK_CLIST(sctree)->selection_mode != GTK_SELECTION_SINGLE) &&
 231                 (GTK_CLIST(sctree)->selection_mode != GTK_SELECTION_BROWSE);
 232         additive = ((state & GDK_CONTROL_MASK) != 0) &&
 233                    (GTK_CLIST(sctree)->selection_mode != GTK_SELECTION_SINGLE) &&
 234                    (GTK_CLIST(sctree)->selection_mode != GTK_SELECTION_BROWSE);
 235
 236         gtk_clist_freeze (GTK_CLIST (sctree));
 237         GTK_CLIST(sctree)->focus_row = row;
 238         GTK_CLIST_GET_CLASS(sctree)->refresh(GTK_CLIST(sctree));
 239         if (!additive)
 240                 gtk_clist_unselect_all (GTK_CLIST (sctree));
 241
 242         if (!range) {
 243                 GtkCTreeNode *node;
 244
 245                 node = gtk_ctree_node_nth (GTK_CTREE(sctree), row);
 246
 247                 /*No need to manage overlapped list*/
 248                 if (additive) {
 249                         if (row_is_selected(sctree, row))
 250                                 gtk_clist_unselect_row (GTK_CLIST (sctree), row, col);
 251                         else
 252                                 g_signal_emit_by_name
 253                                         (G_OBJECT (sctree),
 254                                          "tree_select_row", node, col);
 255                 } else {
 256                         g_signal_emit_by_name
 257                                 (G_OBJECT (sctree),
 258                                  "tree_select_row", node, col);
 259                 }
 260                 sctree->anchor_row = node;
 261         } else
 262                 select_range (sctree, row);
 263         gtk_clist_thaw (GTK_CLIST (sctree));
 264 }
 265
 266 /* Our handler for button_press events.  We override all of GtkCList's broken
 267  * behavior.
 268  */
 269 static gint
 270 gtk_sctree_button_press (GtkWidget *widget, GdkEventButton *event)
 271 {
 272         GtkSCTree *sctree;
 273         GtkCList *clist;
 274         gboolean on_row;
 275         gint row;
 276         gint col;
 277         gint retval;
 278
 279         g_return_val_if_fail (widget != NULL, FALSE);
 280         g_return_val_if_fail (GTK_IS_SCTREE (widget), FALSE);
 281         g_return_val_if_fail (event != NULL, FALSE);
 282
 283         sctree = GTK_SCTREE (widget);
 284         clist = GTK_CLIST (widget);
 285         retval = FALSE;
 286
 287         if (event->window != clist->clist_window)
 288                 return (* GTK_WIDGET_CLASS (parent_class)->button_press_event) (widget, event);
 289
 290         on_row = gtk_clist_get_selection_info (clist, event->x, event->y, &row, &col);
 291
 292         if (on_row && !GTK_WIDGET_HAS_FOCUS(widget))
 293                 gtk_widget_grab_focus (widget);
 294
 295         if (gtk_ctree_is_hot_spot (GTK_CTREE(sctree), event->x, event->y)) {
 296                 gtk_ctree_toggle_expansion
 297                         (GTK_CTREE(sctree),
 298                          gtk_ctree_node_nth(GTK_CTREE(sctree), row));
 299                 return TRUE;
 300         }
 301
 302         switch (event->type) {
 303         case GDK_BUTTON_PRESS:
 304                 if (event->button == 1 || event->button == 2) {
 305                         if (event->button == 2)
 306                                 event->state &= ~(GDK_SHIFT_MASK | GDK_CONTROL_MASK);
 307                         if (on_row) {
 308                                 /* Save the mouse info for DnD */
 309                                 sctree->dnd_press_button = event->button;
 310                                 sctree->dnd_press_x = event->x;
 311                                 sctree->dnd_press_y = event->y;
 312
 313                                 /* Handle selection */
 314                                 if ((row_is_selected (sctree, row)
 315                                      && !(event->state & (GDK_CONTROL_MASK | GDK_SHIFT_MASK)))
 316                                     || ((event->state & GDK_CONTROL_MASK)
 317                                         && !(event->state & GDK_SHIFT_MASK))) {
 318                                         sctree->dnd_select_pending = TRUE;
 319                                         sctree->dnd_select_pending_state = event->state;
 320                                         sctree->dnd_select_pending_row = row;
 321                                 } else
 322                                         select_row (sctree, row, col, event->state);
 323                         } else
 324                                 gtk_clist_unselect_all (clist);
 325
 326                         retval = TRUE;
 327                 } else if (event->button == 3) {
 328                         /* Emit *_popup_menu signal*/
 329                         if (on_row) {
 330                                 if (!row_is_selected(sctree,row))
 331                                         select_row (sctree, row, col, 0);
 332                                 g_signal_emit (G_OBJECT (sctree),
 333                                                  sctree_signals[ROW_POPUP_MENU],
 334                                                  0, event);
 335                         } else {
 336                                 gtk_clist_unselect_all(clist);
 337                                 g_signal_emit (G_OBJECT (sctree),
 338                                                  sctree_signals[EMPTY_POPUP_MENU],
 339                                                  0, event);
 340                         }
 341                         retval = TRUE;
 342                 }
 343
 344                 break;
 345
 346         case GDK_2BUTTON_PRESS:
 347                 if (event->button != 1)
 348                         break;
 349
 350                 sctree->dnd_select_pending = FALSE;
 351                 sctree->dnd_select_pending_state = 0;
 352
 353                 if (on_row)
 354                         g_signal_emit (GTK_OBJECT (sctree),
 355                                        sctree_signals[OPEN_ROW], 0);
 356
 357                 retval = TRUE;
 358                 break;
 359
 360         default:
 361                 break;
 362         }
 363
 364         return retval;
 365 }
 366
 367 /* Our handler for button_release events.  We override all of GtkCList's broken
 368  * behavior.
 369  */
 370 static gint
 371 gtk_sctree_button_release (GtkWidget *widget, GdkEventButton *event)
 372 {
 373         GtkSCTree *sctree;
 374         GtkCList *clist;
 375         gint on_row;
 376         gint row, col;
 377         gint retval;
 378
 379         g_return_val_if_fail (widget != NULL, FALSE);
 380         g_return_val_if_fail (GTK_IS_SCTREE (widget), FALSE);
 381         g_return_val_if_fail (event != NULL, FALSE);
 382
 383         sctree = GTK_SCTREE (widget);
 384         clist = GTK_CLIST (widget);
 385         retval = FALSE;
 386
 387         if (event->window != clist->clist_window)
 388                 return (* GTK_WIDGET_CLASS (parent_class)->button_release_event) (widget, event);
 389
 390         on_row = gtk_clist_get_selection_info (clist, event->x, event->y, &row, &col);
 391
 392         if (!(event->button == 1 || event->button == 2))
 393                 return FALSE;
 394
 395         sctree->dnd_press_button = 0;
 396         sctree->dnd_press_x = 0;
 397         sctree->dnd_press_y = 0;
 398
 399         if (on_row) {
 400                 if (sctree->dnd_select_pending) {
 401                         select_row (sctree, row, col, sctree->dnd_select_pending_state);
 402                         sctree->dnd_select_pending = FALSE;
 403                         sctree->dnd_select_pending_state = 0;
 404                 }
 405
 406                 retval = TRUE;
 407         }
 408
 409         return retval;
 410 }
 411
 412 /* Our handler for motion_notify events.  We override all of GtkCList's broken
 413  * behavior.
 414  */
 415 static gint
 416 gtk_sctree_motion (GtkWidget *widget, GdkEventMotion *event)
 417 {
 418         GtkSCTree *sctree;
 419         GtkCList *clist;
 420
 421         g_return_val_if_fail (widget != NULL, FALSE);
 422         g_return_val_if_fail (GTK_IS_SCTREE (widget), FALSE);
 423         g_return_val_if_fail (event != NULL, FALSE);
 424
 425         sctree = GTK_SCTREE (widget);
 426         clist = GTK_CLIST (widget);
 427
 428         if (event->window != clist->clist_window)
 429                 return (* GTK_WIDGET_CLASS (parent_class)->motion_notify_event) (widget, event);
 430
 431         if (!((sctree->dnd_press_button == 1 && (event->state & GDK_BUTTON1_MASK))
 432               || (sctree->dnd_press_button == 2 && (event->state & GDK_BUTTON2_MASK))))
 433                 return FALSE;
 434
 435         /* This is the same threshold value that is used in gtkdnd.c */
 436
 437         if (MAX (ABS (sctree->dnd_press_x - event->x),
 438                  ABS (sctree->dnd_press_y - event->y)) <= 3)
 439                 return FALSE;
 440
 441         /* Handle any pending selections */
 442
 443         if (sctree->dnd_select_pending) {
 444                 if (!row_is_selected(sctree,sctree->dnd_select_pending_row))
 445                         select_row (sctree,
 446                                     sctree->dnd_select_pending_row,
 447                                     -1,
 448                                     sctree->dnd_select_pending_state);
 449
 450                 sctree->dnd_select_pending = FALSE;
 451                 sctree->dnd_select_pending_state = 0;
 452         }
 453
 454         g_signal_emit (G_OBJECT (sctree),
 455                        sctree_signals[START_DRAG],
 456                        0,
 457                        sctree->dnd_press_button,
 458                        event);
 459         return TRUE;
 460 }
 461
 462 /* We override the drag_begin signal to do nothing */
 463 static void
 464 gtk_sctree_drag_begin (GtkWidget *widget, GdkDragContext *context)
 465 {
 466         /* nothing */
 467 }
 468
 469 /* We override the drag_end signal to do nothing */
 470 static void
 471 gtk_sctree_drag_end (GtkWidget *widget, GdkDragContext *context)
 472 {
 473         /* nothing */
 474 }
 475
 476 /* We override the drag_data_get signal to do nothing */
 477 static void
 478 gtk_sctree_drag_data_get (GtkWidget *widget, GdkDragContext *context,
 479                                      GtkSelectionData *data, guint info, guint time)
 480 {
 481         /* nothing */
 482 }
 483
 484 /* We override the drag_leave signal to do nothing */
 485 static void
 486 gtk_sctree_drag_leave (GtkWidget *widget, GdkDragContext *context, guint time)
 487 {
 488         /* nothing */
 489 }
 490
 491 /* We override the drag_motion signal to do nothing */
 492 static gboolean
 493 gtk_sctree_drag_motion (GtkWidget *widget, GdkDragContext *context,
 494                                    gint x, gint y, guint time)
 495 {
 496         return FALSE;
 497 }
 498
 499 /* We override the drag_drop signal to do nothing */
 500 static gboolean
 501 gtk_sctree_drag_drop (GtkWidget *widget, GdkDragContext *context,
 502                                  gint x, gint y, guint time)
 503 {
 504         return FALSE;
 505 }
 506
 507 /* We override the drag_data_received signal to do nothing */
 508 static void
 509 gtk_sctree_drag_data_received (GtkWidget *widget, GdkDragContext *context,
 510                                           gint x, gint y, GtkSelectionData *data,
 511                                           guint info, guint time)
 512 {
 513         /* nothing */
 514 }
 515
 516 /* Our handler for the clear signal of the clist.  We have to reset the anchor
 517  * to null.
 518  */
 519 static void
 520 gtk_sctree_clear (GtkCList *clist)
 521 {
 522         GtkSCTree *sctree;
 523
 524         g_return_if_fail (clist != NULL);
 525         g_return_if_fail (GTK_IS_SCTREE (clist));
 526
 527         sctree = GTK_SCTREE (clist);
 528         sctree->anchor_row = NULL;
 529
 530         if (((GtkCListClass *)parent_class)->clear)
 531                 (* ((GtkCListClass *)parent_class)->clear) (clist);
 532 }
 533
 534 /* Our handler for the change_focus_row_expansion signal of the ctree.
 535  We have to set the anchor to parent visible node.
 536  */
 537 static void
 538 gtk_sctree_collapse (GtkCTree *ctree, GtkCTreeNode *node)
 539 {
 540         g_return_if_fail (ctree != NULL);
 541         g_return_if_fail (GTK_IS_SCTREE (ctree));
 542
 543         (* parent_class->tree_collapse) (ctree, node);
 544         GTK_SCTREE(ctree)->anchor_row =
 545                 gtk_ctree_node_nth(ctree, GTK_CLIST(ctree)->focus_row);
 546 }
 547
 548 GtkWidget *gtk_sctree_new_with_titles (gint columns, gint tree_column,
 549                                        gchar *titles[])
 550 {
 551 #if 0
 552         GtkSCTree* sctree;
 553
 554         sctree = gtk_type_new (gtk_sctree_get_type ());
 555         gtk_ctree_construct (GTK_CTREE (sctree), columns, tree_column, titles);
 556
 557         gtk_clist_set_selection_mode(GTK_CLIST(sctree), GTK_SELECTION_EXTENDED);
 558
 559         return GTK_WIDGET (sctree);
 560 #else
 561         GtkWidget *widget;
 562
 563         g_return_val_if_fail (columns > 0, NULL);
 564         g_return_val_if_fail (tree_column >= 0 && tree_column < columns, NULL);
 565
 566         widget = gtk_widget_new (TYPE_GTK_SCTREE,
 567                                  "n_columns", columns,
 568                                  "tree_column", tree_column,
 569                                  NULL);
 570         if (titles) {
 571                 GtkCList *clist = GTK_CLIST (widget);
 572                 guint i;
 573
 574                 for (i = 0; i < columns; i++)
 575                         gtk_clist_set_column_title (clist, i, titles[i]);
 576                 gtk_clist_column_titles_show (clist);
 577         }
 578
 579         return widget;
 580 #endif
 581 }
 582
 583 void gtk_sctree_select (GtkSCTree *sctree, GtkCTreeNode *node)
 584 {
 585         select_row(sctree,
 586                    g_list_position(GTK_CLIST(sctree)->row_list, (GList *)node),
 587                    -1, 0);
 588 }
 589
 590 void gtk_sctree_unselect_all (GtkSCTree *sctree)
 591 {
 592         gtk_clist_unselect_all(GTK_CLIST(sctree));
 593         sctree->anchor_row = NULL;
 594 }
 595
 596 void gtk_sctree_set_anchor_row (GtkSCTree *sctree, GtkCTreeNode *node)
 597 {
 598         sctree->anchor_row = node;
 599 }
 600
 601 /***********************************************************
 602  *             Tree sorting functions                      *
 603  ***********************************************************/
 604
 605 static void sink(GtkCList *clist, GPtrArray *numbers, gint root, gint bottom)
 606 {
 607         gint j, k ;
 608         GtkCTreeNode *temp;
 609
 610         j = 2 * root;
 611         k = j + 1;
 612
 613         /* find the maximum element of numbers[root],
 614            numbers[2*root] and numbers[2*root+1] */
 615         if (j <= bottom) {
 616                 if (clist->compare( clist, GTK_CTREE_ROW (g_ptr_array_index(numbers, root)),
 617                                     GTK_CTREE_ROW(g_ptr_array_index( numbers, j))) >= 0)
 618                         j = root;
 619                 if (k <= bottom)
 620                         if (clist->compare( clist, GTK_CTREE_ROW (g_ptr_array_index(numbers, k)),
 621                                             GTK_CTREE_ROW (g_ptr_array_index( numbers, j))) > 0)
 622                                 j = k;
 623                 /* if numbers[root] wasn't the maximum element then
 624                    sink again */
 625                 if (root != j) {
 626                         temp = g_ptr_array_index( numbers,root);
 627                         g_ptr_array_index( numbers, root) = g_ptr_array_index( numbers, j);
 628                         g_ptr_array_index( numbers, j) = temp;
 629                         sink( clist, numbers, j, bottom);
 630                 }
 631         }
 632 }
 633
 634 static void heap_sort(GtkCList *clist, GPtrArray *numbers, gint array_size)
 635 {
 636         gint i;
 637         GtkCTreeNode *temp;
 638
 639         /* build the Heap */
 640         for (i = (array_size / 2); i >= 1; i--)
 641                 sink( clist, numbers, i, array_size);
 642         /* output the Heap */
 643         for (i = array_size; i >= 2; i--) {
 644                 temp = g_ptr_array_index( numbers, 1);
 645                 g_ptr_array_index( numbers, 1) = g_ptr_array_index( numbers, i);
 646                 g_ptr_array_index( numbers, i) = temp;
 647                 sink( clist, numbers, 1, i-1);
 648         }
 649 }
 650
 651 static void
 652 tree_sort (GtkCTree    *ctree,
 653            GtkCTreeNode *node,
 654            gpointer      data)
 655 {
 656         GtkCTreeNode *list_start, *work, *next;
 657         GPtrArray *row_array, *viewable_array;
 658         GtkCList *clist;
 659         gint i;
 660
 661
 662         clist = GTK_CLIST (ctree);
 663
 664         if (node)
 665                 work = GTK_CTREE_ROW (node)->children;
 666         else
 667                 work = GTK_CTREE_NODE (clist->row_list);
 668
 669         row_array = g_ptr_array_new();
 670         viewable_array = g_ptr_array_new();
 671
 672         if (work) {
 673                 g_ptr_array_add( row_array, NULL);
 674                 while (work) {
 675                         /* add all rows to row_array */
 676                         g_ptr_array_add( row_array, work);
 677                         if (GTK_CTREE_ROW (work)->parent && gtk_ctree_is_viewable( ctree, work))
 678                                 g_ptr_array_add( viewable_array, GTK_CTREE_ROW (work)->parent);
 679                         next = GTK_CTREE_ROW (work)->sibling;
 680                         gtk_ctree_unlink( ctree, work, FALSE);
 681                         work = next;
 682                 }
 683
 684                 heap_sort( clist, row_array, (row_array->len)-1);
 685
 686                 if (node)
 687                         list_start = GTK_CTREE_ROW (node)->children;
 688                 else
 689                         list_start = GTK_CTREE_NODE (clist->row_list);
 690
 691                 if (clist->sort_type == GTK_SORT_ASCENDING) {
 692                         for (i=(row_array->len)-1; i>=1; i--) {
 693                                 work = g_ptr_array_index( row_array, i);
 694                                 gtk_ctree_link( ctree, work, node, list_start, FALSE);
 695                                 list_start = work;
 696                                 /* insert work at the beginning of the list */
 697                         }
 698                 } else {
 699                         for (i=1; i<row_array->len; i++) {
 700                                 work = g_ptr_array_index( row_array, i);
 701                                 gtk_ctree_link( ctree, work, node, list_start, FALSE);
 702                                 list_start = work;
 703                                 /* insert work at the beginning of the list */
 704                         }
 705                 }
 706
 707                 for (i=0; i<viewable_array->len; i++) {
 708                         gtk_ctree_expand( ctree, g_ptr_array_index( viewable_array, i));
 709                 }
 710
 711         }
 712
 713         g_ptr_array_free( row_array, TRUE);
 714         g_ptr_array_free( viewable_array, TRUE);
 715 }
 716
 717 void
 718 gtk_sctree_sort_recursive (GtkCTree     *ctree,
 719                           GtkCTreeNode *node)
 720 {
 721         GtkCList *clist;
 722         GtkCTreeNode *focus_node = NULL;
 723
 724         g_return_if_fail (ctree != NULL);
 725         g_return_if_fail (GTK_IS_CTREE (ctree));
 726
 727         clist = GTK_CLIST (ctree);
 728
 729         gtk_clist_freeze (clist);
 730
 731         if (clist->selection_mode == GTK_SELECTION_EXTENDED) {
 732                 GTK_CLIST_GET_CLASS (clist)->resync_selection (clist, NULL);
 733
 734                 g_list_free (clist->undo_selection);
 735                 g_list_free (clist->undo_unselection);
 736                 clist->undo_selection = NULL;
 737                 clist->undo_unselection = NULL;
 738         }
 739
 740         if (!node || (node && gtk_ctree_is_viewable (ctree, node)))
 741                 focus_node = GTK_CTREE_NODE (g_list_nth (clist->row_list, clist->focus_row));
 742
 743         gtk_ctree_post_recursive (ctree, node, GTK_CTREE_FUNC (tree_sort), NULL);
 744
 745         if (!node)
 746                 tree_sort (ctree, NULL, NULL);
 747
 748         if (focus_node) {
 749                 clist->focus_row = g_list_position (clist->row_list,(GList *)focus_node);
 750                 clist->undo_anchor = clist->focus_row;
 751         }
 752
 753         gtk_clist_thaw (clist);
 754 }
 755
 756 void
 757 gtk_sctree_sort_node (GtkCTree     *ctree,
 758                      GtkCTreeNode *node)
 759 {
 760         GtkCList *clist;
 761         GtkCTreeNode *focus_node = NULL;
 762
 763         g_return_if_fail (ctree != NULL);
 764         g_return_if_fail (GTK_IS_CTREE (ctree));
 765
 766         clist = GTK_CLIST (ctree);
 767
 768         gtk_clist_freeze (clist);
 769
 770         if (clist->selection_mode == GTK_SELECTION_EXTENDED) {
 771                 GTK_CLIST_GET_CLASS (clist)->resync_selection (clist, NULL);
 772
 773                 g_list_free (clist->undo_selection);
 774                 g_list_free (clist->undo_unselection);
 775                 clist->undo_selection = NULL;
 776                 clist->undo_unselection = NULL;
 777         }
 778
 779         if (!node || (node && gtk_ctree_is_viewable (ctree, node)))
 780                 focus_node = GTK_CTREE_NODE (g_list_nth (clist->row_list, clist->focus_row));
 781
 782         tree_sort (ctree, node, NULL);
 783
 784         if (focus_node) {
 785                 clist->focus_row = g_list_position (clist->row_list,(GList *)focus_node);
 786                 clist->undo_anchor = clist->focus_row;
 787         }
 788
 789         gtk_clist_thaw (clist);
 790 }
 791
 792 /************************************************************************/
 793
 794 static void
 795 gtk_ctree_unlink (GtkCTree     *ctree,
 796                   GtkCTreeNode *node,
 797                   gboolean      update_focus_row)
 798 {
 799         GtkCList *clist;
 800         gint rows;
 801         gint level;
 802         gint visible;
 803         GtkCTreeNode *work;
 804         GtkCTreeNode *parent;
 805         GList *list;
 806
 807         g_return_if_fail (ctree != NULL);
 808         g_return_if_fail (GTK_IS_CTREE (ctree));
 809         g_return_if_fail (node != NULL);
 810
 811         clist = GTK_CLIST (ctree);
 812
 813         if (update_focus_row && clist->selection_mode == GTK_SELECTION_EXTENDED) {
 814                 GTK_CLIST_GET_CLASS (clist)->resync_selection (clist, NULL);
 815
 816                 g_list_free (clist->undo_selection);
 817                 g_list_free (clist->undo_unselection);
 818                 clist->undo_selection = NULL;
 819                 clist->undo_unselection = NULL;
 820         }
 821
 822         visible = gtk_ctree_is_viewable (ctree, node);
 823
 824         /* clist->row_list_end unlinked ? */
 825         if (visible && (GTK_CTREE_NODE_NEXT (node) == NULL ||
 826            (GTK_CTREE_ROW (node)->children && gtk_ctree_is_ancestor (ctree, node,
 827             GTK_CTREE_NODE (clist->row_list_end)))))
 828                 clist->row_list_end = (GList *) (GTK_CTREE_NODE_PREV (node));
 829
 830         /* update list */
 831         rows = 0;
 832         level = GTK_CTREE_ROW (node)->level;
 833         work = GTK_CTREE_NODE_NEXT (node);
 834         while (work && GTK_CTREE_ROW (work)->level > level) {
 835                 work = GTK_CTREE_NODE_NEXT (work);
 836                 rows++;
 837         }
 838
 839         if (visible) {
 840                 clist->rows -= (rows + 1);
 841
 842                 if (update_focus_row) {
 843                         gint pos;
 844
 845                         pos = g_list_position (clist->row_list, (GList *)node);
 846                         if (pos + rows < clist->focus_row)
 847                                 clist->focus_row -= (rows + 1);
 848                         else if (pos <= clist->focus_row) {
 849                                 if (!GTK_CTREE_ROW (node)->sibling)
 850                                         clist->focus_row = MAX (pos - 1, 0);
 851                                 else
 852                                         clist->focus_row = pos;
 853
 854                                 clist->focus_row = MIN (clist->focus_row, clist->rows - 1);
 855                         }
 856                         clist->undo_anchor = clist->focus_row;
 857                 }
 858         }
 859
 860         if (work) {
 861                 list = (GList *)GTK_CTREE_NODE_PREV (work);
 862                 list->next = NULL;
 863                 list = (GList *)work;
 864                 list->prev = (GList *)GTK_CTREE_NODE_PREV (node);
 865         }
 866
 867         if (GTK_CTREE_NODE_PREV (node) &&
 868             GTK_CTREE_NODE_NEXT (GTK_CTREE_NODE_PREV (node)) == node) {
 869                 list = (GList *)GTK_CTREE_NODE_PREV (node);
 870                 list->next = (GList *)work;
 871         }
 872
 873         /* update tree */
 874         parent = GTK_CTREE_ROW (node)->parent;
 875         if (parent) {
 876                 if (GTK_CTREE_ROW (parent)->children == node) {
 877                         GTK_CTREE_ROW (parent)->children = GTK_CTREE_ROW (node)->sibling;
 878                         if (!GTK_CTREE_ROW (parent)->children)
 879                                 gtk_ctree_collapse (ctree, parent);
 880                 }
 881                 else {
 882                         GtkCTreeNode *sibling;
 883
 884                         sibling = GTK_CTREE_ROW (parent)->children;
 885                         while (GTK_CTREE_ROW (sibling)->sibling != node)
 886                                 sibling = GTK_CTREE_ROW (sibling)->sibling;
 887                         GTK_CTREE_ROW (sibling)->sibling = GTK_CTREE_ROW (node)->sibling;
 888                 }
 889         }
 890         else {
 891                 if (clist->row_list == (GList *)node)
 892                         clist->row_list = (GList *) (GTK_CTREE_ROW (node)->sibling);
 893                 else {
 894                         GtkCTreeNode *sibling;
 895
 896                         sibling = GTK_CTREE_NODE (clist->row_list);
 897                         while (GTK_CTREE_ROW (sibling)->sibling != node)
 898                                 sibling = GTK_CTREE_ROW (sibling)->sibling;
 899                         GTK_CTREE_ROW (sibling)->sibling = GTK_CTREE_ROW (node)->sibling;
 900                 }
 901         }
 902 }
 903
 904 static void
 905 gtk_ctree_link (GtkCTree     *ctree,
 906                 GtkCTreeNode *node,
 907                 GtkCTreeNode *parent,
 908                 GtkCTreeNode *sibling,
 909                 gboolean      update_focus_row)
 910 {
 911         GtkCList *clist;
 912         GList *list_end;
 913         GList *list;
 914         GList *work;
 915         gboolean visible = FALSE;
 916         gint rows = 0;
 917
 918         if (sibling)
 919                 g_return_if_fail (GTK_CTREE_ROW (sibling)->parent == parent);
 920         g_return_if_fail (node != NULL);
 921         g_return_if_fail (node != sibling);
 922         g_return_if_fail (node != parent);
 923
 924         clist = GTK_CLIST (ctree);
 925
 926         if (update_focus_row && clist->selection_mode == GTK_SELECTION_EXTENDED) {
 927                 GTK_CLIST_GET_CLASS (clist)->resync_selection (clist, NULL);
 928
 929                 g_list_free (clist->undo_selection);
 930                 g_list_free (clist->undo_unselection);
 931                 clist->undo_selection = NULL;
 932                 clist->undo_unselection = NULL;
 933         }
 934
 935         for (rows = 1, list_end = (GList *)node; list_end->next;
 936              list_end = list_end->next)
 937                 rows++;
 938
 939         GTK_CTREE_ROW (node)->parent = parent;
 940         GTK_CTREE_ROW (node)->sibling = sibling;
 941
 942         if (!parent || (parent && (gtk_ctree_is_viewable (ctree, parent) &&
 943             GTK_CTREE_ROW (parent)->expanded))) {
 944                 visible = TRUE;
 945                 clist->rows += rows;
 946         }
 947
 948         if (parent)
 949                 work = (GList *)(GTK_CTREE_ROW (parent)->children);
 950         else
 951                 work = clist->row_list;
 952
 953         if (sibling) {
 954                 if (work != (GList *)sibling) {
 955                         while (GTK_CTREE_ROW (work)->sibling != sibling)
 956                                 work = (GList *)(GTK_CTREE_ROW (work)->sibling);
 957                         GTK_CTREE_ROW (work)->sibling = node;
 958                 }
 959
 960                 if (sibling == GTK_CTREE_NODE (clist->row_list))
 961                 clist->row_list = (GList *) node;
 962                 if (GTK_CTREE_NODE_PREV (sibling) &&
 963                     GTK_CTREE_NODE_NEXT (GTK_CTREE_NODE_PREV (sibling)) == sibling) {
 964                         list = (GList *)GTK_CTREE_NODE_PREV (sibling);
 965                         list->next = (GList *)node;
 966                 }
 967
 968                 list = (GList *)node;
 969                 list->prev = (GList *)GTK_CTREE_NODE_PREV (sibling);
 970                 list_end->next = (GList *)sibling;
 971                 list = (GList *)sibling;
 972                 list->prev = list_end;
 973                 if (parent && GTK_CTREE_ROW (parent)->children == sibling)
 974                         GTK_CTREE_ROW (parent)->children = node;
 975         }
 976         else {
 977                 if (work) {
 978                         /* find sibling */
 979                         while (GTK_CTREE_ROW (work)->sibling)
 980                         work = (GList *)(GTK_CTREE_ROW (work)->sibling);
 981                         GTK_CTREE_ROW (work)->sibling = node;
 982
 983                         /* find last visible child of sibling */
 984                         work = (GList *) gtk_ctree_last_visible (ctree,
 985                                GTK_CTREE_NODE (work));
 986
 987                         list_end->next = work->next;
 988                         if (work->next)
 989                                 list = work->next->prev = list_end;
 990                         work->next = (GList *)node;
 991                         list = (GList *)node;
 992                         list->prev = work;
 993                 }
 994                 else {
 995                         if (parent) {
 996                                 GTK_CTREE_ROW (parent)->children = node;
 997                                 list = (GList *)node;
 998                                 list->prev = (GList *)parent;
 999                                 if (GTK_CTREE_ROW (parent)->expanded) {
1000                                         list_end->next = (GList *)GTK_CTREE_NODE_NEXT (parent);
1001                                         if (GTK_CTREE_NODE_NEXT(parent)) {
1002                                                 list = (GList *)GTK_CTREE_NODE_NEXT (parent);
1003                                                 list->prev = list_end;
1004                                         }
1005                                         list = (GList *)parent;
1006                                         list->next = (GList *)node;
1007                                 }
1008                                 else
1009                                         list_end->next = NULL;
1010                         }
1011                         else {
1012                                 clist->row_list = (GList *)node;
1013                                 list = (GList *)node;
1014                                 list->prev = NULL;
1015                                 list_end->next = NULL;
1016                         }
1017                 }
1018         }
1019
1020         gtk_ctree_pre_recursive (ctree, node, tree_update_level, NULL);
1021
1022         if (clist->row_list_end == NULL ||
1023             clist->row_list_end->next == (GList *)node)
1024                 clist->row_list_end = list_end;
1025
1026         if (visible && update_focus_row) {
1027                 gint pos;
1028
1029                 pos = g_list_position (clist->row_list, (GList *)node);
1030
1031                 if (pos <= clist->focus_row) {
1032                         clist->focus_row += rows;
1033                         clist->undo_anchor = clist->focus_row;
1034                 }
1035         }
1036 }
1037
1038 static void
1039 tree_update_level (GtkCTree     *ctree,
1040                    GtkCTreeNode *node,
1041                    gpointer      data)
1042 {
1043         if (!node)
1044                 return;
1045
1046         if (GTK_CTREE_ROW (node)->parent)
1047                 GTK_CTREE_ROW (node)->level =
1048                 GTK_CTREE_ROW (GTK_CTREE_ROW (node)->parent)->level + 1;
1049         else
1050                 GTK_CTREE_ROW (node)->level = 1;
1051 }
1052
1053 static GtkCTreeNode *
1054 gtk_ctree_last_visible (GtkCTree     *ctree,
1055                         GtkCTreeNode *node)
1056 {
1057         GtkCTreeNode *work;
1058
1059         if (!node)
1060                 return NULL;
1061
1062         work = GTK_CTREE_ROW (node)->children;
1063
1064         if (!work || !GTK_CTREE_ROW (node)->expanded)
1065                 return node;
1066
1067         while (GTK_CTREE_ROW (work)->sibling)
1068                 work = GTK_CTREE_ROW (work)->sibling;
1069
1070         return gtk_ctree_last_visible (ctree, work);
1071 }