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 (G_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, 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_select_with_state (GtkSCTree *sctree, GtkCTreeNode *node, int state)
 591 {
 592         select_row(sctree,
 593                    g_list_position(GTK_CLIST(sctree)->row_list, (GList *)node),
 594                    -1, state);
 595 }
 596
 597 void gtk_sctree_unselect_all (GtkSCTree *sctree)
 598 {
 599         gtk_clist_unselect_all(GTK_CLIST(sctree));
 600         sctree->anchor_row = NULL;
 601 }
 602
 603 void gtk_sctree_set_anchor_row (GtkSCTree *sctree, GtkCTreeNode *node)
 604 {
 605         sctree->anchor_row = node;
 606 }
 607
 608 /***********************************************************
 609  *             Tree sorting functions                      *
 610  ***********************************************************/
 611
 612 static void sink(GtkCList *clist, GPtrArray *numbers, gint root, gint bottom)
 613 {
 614         gint j, k ;
 615         GtkCTreeNode *temp;
 616
 617         j = 2 * root;
 618         k = j + 1;
 619
 620         /* find the maximum element of numbers[root],
 621            numbers[2*root] and numbers[2*root+1] */
 622         if (j <= bottom) {
 623                 if (clist->compare( clist, GTK_CTREE_ROW (g_ptr_array_index(numbers, root)),
 624                                     GTK_CTREE_ROW(g_ptr_array_index( numbers, j))) >= 0)
 625                         j = root;
 626                 if (k <= bottom)
 627                         if (clist->compare( clist, GTK_CTREE_ROW (g_ptr_array_index(numbers, k)),
 628                                             GTK_CTREE_ROW (g_ptr_array_index( numbers, j))) > 0)
 629                                 j = k;
 630                 /* if numbers[root] wasn't the maximum element then
 631                    sink again */
 632                 if (root != j) {
 633                         temp = g_ptr_array_index( numbers,root);
 634                         g_ptr_array_index( numbers, root) = g_ptr_array_index( numbers, j);
 635                         g_ptr_array_index( numbers, j) = temp;
 636                         sink( clist, numbers, j, bottom);
 637                 }
 638         }
 639 }
 640
 641 static void heap_sort(GtkCList *clist, GPtrArray *numbers, gint array_size)
 642 {
 643         gint i;
 644         GtkCTreeNode *temp;
 645
 646         /* build the Heap */
 647         for (i = (array_size / 2); i >= 1; i--)
 648                 sink( clist, numbers, i, array_size);
 649         /* output the Heap */
 650         for (i = array_size; i >= 2; i--) {
 651                 temp = g_ptr_array_index( numbers, 1);
 652                 g_ptr_array_index( numbers, 1) = g_ptr_array_index( numbers, i);
 653                 g_ptr_array_index( numbers, i) = temp;
 654                 sink( clist, numbers, 1, i-1);
 655         }
 656 }
 657
 658 static void
 659 tree_sort (GtkCTree    *ctree,
 660            GtkCTreeNode *node,
 661            gpointer      data)
 662 {
 663         GtkCTreeNode *list_start, *work, *next;
 664         GPtrArray *row_array, *viewable_array;
 665         GtkCList *clist;
 666         gint i;
 667
 668
 669         clist = GTK_CLIST (ctree);
 670
 671         if (node)
 672                 work = GTK_CTREE_ROW (node)->children;
 673         else
 674                 work = GTK_CTREE_NODE (clist->row_list);
 675
 676         row_array = g_ptr_array_new();
 677         viewable_array = g_ptr_array_new();
 678
 679         if (work) {
 680                 g_ptr_array_add( row_array, NULL);
 681                 while (work) {
 682                         /* add all rows to row_array */
 683                         g_ptr_array_add( row_array, work);
 684                         if (GTK_CTREE_ROW (work)->parent && gtk_ctree_is_viewable( ctree, work))
 685                                 g_ptr_array_add( viewable_array, GTK_CTREE_ROW (work)->parent);
 686                         next = GTK_CTREE_ROW (work)->sibling;
 687                         gtk_ctree_unlink( ctree, work, FALSE);
 688                         work = next;
 689                 }
 690
 691                 heap_sort( clist, row_array, (row_array->len)-1);
 692
 693                 if (node)
 694                         list_start = GTK_CTREE_ROW (node)->children;
 695                 else
 696                         list_start = GTK_CTREE_NODE (clist->row_list);
 697
 698                 if (clist->sort_type == GTK_SORT_ASCENDING) {
 699                         for (i=(row_array->len)-1; i>=1; 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                 } else {
 706                         for (i=1; i<row_array->len; i++) {
 707                                 work = g_ptr_array_index( row_array, i);
 708                                 gtk_ctree_link( ctree, work, node, list_start, FALSE);
 709                                 list_start = work;
 710                                 /* insert work at the beginning of the list */
 711                         }
 712                 }
 713
 714                 for (i=0; i<viewable_array->len; i++) {
 715                         gtk_ctree_expand( ctree, g_ptr_array_index( viewable_array, i));
 716                 }
 717
 718         }
 719
 720         g_ptr_array_free( row_array, TRUE);
 721         g_ptr_array_free( viewable_array, TRUE);
 722 }
 723
 724 void
 725 gtk_sctree_sort_recursive (GtkCTree     *ctree,
 726                           GtkCTreeNode *node)
 727 {
 728         GtkCList *clist;
 729         GtkCTreeNode *focus_node = NULL;
 730
 731         g_return_if_fail (ctree != NULL);
 732         g_return_if_fail (GTK_IS_CTREE (ctree));
 733
 734         clist = GTK_CLIST (ctree);
 735
 736         gtk_clist_freeze (clist);
 737
 738         if (clist->selection_mode == GTK_SELECTION_EXTENDED) {
 739                 GTK_CLIST_GET_CLASS (clist)->resync_selection (clist, NULL);
 740
 741                 g_list_free (clist->undo_selection);
 742                 g_list_free (clist->undo_unselection);
 743                 clist->undo_selection = NULL;
 744                 clist->undo_unselection = NULL;
 745         }
 746
 747         if (!node || (node && gtk_ctree_is_viewable (ctree, node)))
 748                 focus_node = GTK_CTREE_NODE (g_list_nth (clist->row_list, clist->focus_row));
 749
 750         gtk_ctree_post_recursive (ctree, node, GTK_CTREE_FUNC (tree_sort), NULL);
 751
 752         if (!node)
 753                 tree_sort (ctree, NULL, NULL);
 754
 755         if (focus_node) {
 756                 clist->focus_row = g_list_position (clist->row_list,(GList *)focus_node);
 757                 clist->undo_anchor = clist->focus_row;
 758         }
 759
 760         gtk_clist_thaw (clist);
 761 }
 762
 763 void
 764 gtk_sctree_sort_node (GtkCTree     *ctree,
 765                      GtkCTreeNode *node)
 766 {
 767         GtkCList *clist;
 768         GtkCTreeNode *focus_node = NULL;
 769
 770         g_return_if_fail (ctree != NULL);
 771         g_return_if_fail (GTK_IS_CTREE (ctree));
 772
 773         clist = GTK_CLIST (ctree);
 774
 775         gtk_clist_freeze (clist);
 776
 777         if (clist->selection_mode == GTK_SELECTION_EXTENDED) {
 778                 GTK_CLIST_GET_CLASS (clist)->resync_selection (clist, NULL);
 779
 780                 g_list_free (clist->undo_selection);
 781                 g_list_free (clist->undo_unselection);
 782                 clist->undo_selection = NULL;
 783                 clist->undo_unselection = NULL;
 784         }
 785
 786         if (!node || (node && gtk_ctree_is_viewable (ctree, node)))
 787                 focus_node = GTK_CTREE_NODE (g_list_nth (clist->row_list, clist->focus_row));
 788
 789         tree_sort (ctree, node, NULL);
 790
 791         if (focus_node) {
 792                 clist->focus_row = g_list_position (clist->row_list,(GList *)focus_node);
 793                 clist->undo_anchor = clist->focus_row;
 794         }
 795
 796         gtk_clist_thaw (clist);
 797 }
 798
 799 /************************************************************************/
 800
 801 static void
 802 gtk_ctree_unlink (GtkCTree     *ctree,
 803                   GtkCTreeNode *node,
 804                   gboolean      update_focus_row)
 805 {
 806         GtkCList *clist;
 807         gint rows;
 808         gint level;
 809         gint visible;
 810         GtkCTreeNode *work;
 811         GtkCTreeNode *parent;
 812         GList *list;
 813
 814         g_return_if_fail (ctree != NULL);
 815         g_return_if_fail (GTK_IS_CTREE (ctree));
 816         g_return_if_fail (node != NULL);
 817
 818         clist = GTK_CLIST (ctree);
 819
 820         if (update_focus_row && clist->selection_mode == GTK_SELECTION_EXTENDED) {
 821                 GTK_CLIST_GET_CLASS (clist)->resync_selection (clist, NULL);
 822
 823                 g_list_free (clist->undo_selection);
 824                 g_list_free (clist->undo_unselection);
 825                 clist->undo_selection = NULL;
 826                 clist->undo_unselection = NULL;
 827         }
 828
 829         visible = gtk_ctree_is_viewable (ctree, node);
 830
 831         /* clist->row_list_end unlinked ? */
 832         if (visible && (GTK_CTREE_NODE_NEXT (node) == NULL ||
 833            (GTK_CTREE_ROW (node)->children && gtk_ctree_is_ancestor (ctree, node,
 834             GTK_CTREE_NODE (clist->row_list_end)))))
 835                 clist->row_list_end = (GList *) (GTK_CTREE_NODE_PREV (node));
 836
 837         /* update list */
 838         rows = 0;
 839         level = GTK_CTREE_ROW (node)->level;
 840         work = GTK_CTREE_NODE_NEXT (node);
 841         while (work && GTK_CTREE_ROW (work)->level > level) {
 842                 work = GTK_CTREE_NODE_NEXT (work);
 843                 rows++;
 844         }
 845
 846         if (visible) {
 847                 clist->rows -= (rows + 1);
 848
 849                 if (update_focus_row) {
 850                         gint pos;
 851
 852                         pos = g_list_position (clist->row_list, (GList *)node);
 853                         if (pos + rows < clist->focus_row)
 854                                 clist->focus_row -= (rows + 1);
 855                         else if (pos <= clist->focus_row) {
 856                                 if (!GTK_CTREE_ROW (node)->sibling)
 857                                         clist->focus_row = MAX (pos - 1, 0);
 858                                 else
 859                                         clist->focus_row = pos;
 860
 861                                 clist->focus_row = MIN (clist->focus_row, clist->rows - 1);
 862                         }
 863                         clist->undo_anchor = clist->focus_row;
 864                 }
 865         }
 866
 867         if (work) {
 868                 list = (GList *)GTK_CTREE_NODE_PREV (work);
 869                 list->next = NULL;
 870                 list = (GList *)work;
 871                 list->prev = (GList *)GTK_CTREE_NODE_PREV (node);
 872         }
 873
 874         if (GTK_CTREE_NODE_PREV (node) &&
 875             GTK_CTREE_NODE_NEXT (GTK_CTREE_NODE_PREV (node)) == node) {
 876                 list = (GList *)GTK_CTREE_NODE_PREV (node);
 877                 list->next = (GList *)work;
 878         }
 879
 880         /* update tree */
 881         parent = GTK_CTREE_ROW (node)->parent;
 882         if (parent) {
 883                 if (GTK_CTREE_ROW (parent)->children == node) {
 884                         GTK_CTREE_ROW (parent)->children = GTK_CTREE_ROW (node)->sibling;
 885                         if (!GTK_CTREE_ROW (parent)->children)
 886                                 gtk_ctree_collapse (ctree, parent);
 887                 }
 888                 else {
 889                         GtkCTreeNode *sibling;
 890
 891                         sibling = GTK_CTREE_ROW (parent)->children;
 892                         while (GTK_CTREE_ROW (sibling)->sibling != node)
 893                                 sibling = GTK_CTREE_ROW (sibling)->sibling;
 894                         GTK_CTREE_ROW (sibling)->sibling = GTK_CTREE_ROW (node)->sibling;
 895                 }
 896         }
 897         else {
 898                 if (clist->row_list == (GList *)node)
 899                         clist->row_list = (GList *) (GTK_CTREE_ROW (node)->sibling);
 900                 else {
 901                         GtkCTreeNode *sibling;
 902
 903                         sibling = GTK_CTREE_NODE (clist->row_list);
 904                         while (GTK_CTREE_ROW (sibling)->sibling != node)
 905                                 sibling = GTK_CTREE_ROW (sibling)->sibling;
 906                         GTK_CTREE_ROW (sibling)->sibling = GTK_CTREE_ROW (node)->sibling;
 907                 }
 908         }
 909 }
 910
 911 static void
 912 gtk_ctree_link (GtkCTree     *ctree,
 913                 GtkCTreeNode *node,
 914                 GtkCTreeNode *parent,
 915                 GtkCTreeNode *sibling,
 916                 gboolean      update_focus_row)
 917 {
 918         GtkCList *clist;
 919         GList *list_end;
 920         GList *list;
 921         GList *work;
 922         gboolean visible = FALSE;
 923         gint rows = 0;
 924
 925         if (sibling)
 926                 g_return_if_fail (GTK_CTREE_ROW (sibling)->parent == parent);
 927         g_return_if_fail (node != NULL);
 928         g_return_if_fail (node != sibling);
 929         g_return_if_fail (node != parent);
 930
 931         clist = GTK_CLIST (ctree);
 932
 933         if (update_focus_row && clist->selection_mode == GTK_SELECTION_EXTENDED) {
 934                 GTK_CLIST_GET_CLASS (clist)->resync_selection (clist, NULL);
 935
 936                 g_list_free (clist->undo_selection);
 937                 g_list_free (clist->undo_unselection);
 938                 clist->undo_selection = NULL;
 939                 clist->undo_unselection = NULL;
 940         }
 941
 942         for (rows = 1, list_end = (GList *)node; list_end->next;
 943              list_end = list_end->next)
 944                 rows++;
 945
 946         GTK_CTREE_ROW (node)->parent = parent;
 947         GTK_CTREE_ROW (node)->sibling = sibling;
 948
 949         if (!parent || (parent && (gtk_ctree_is_viewable (ctree, parent) &&
 950             GTK_CTREE_ROW (parent)->expanded))) {
 951                 visible = TRUE;
 952                 clist->rows += rows;
 953         }
 954
 955         if (parent)
 956                 work = (GList *)(GTK_CTREE_ROW (parent)->children);
 957         else
 958                 work = clist->row_list;
 959
 960         if (sibling) {
 961                 if (work != (GList *)sibling) {
 962                         while (GTK_CTREE_ROW (work)->sibling != sibling)
 963                                 work = (GList *)(GTK_CTREE_ROW (work)->sibling);
 964                         GTK_CTREE_ROW (work)->sibling = node;
 965                 }
 966
 967                 if (sibling == GTK_CTREE_NODE (clist->row_list))
 968                 clist->row_list = (GList *) node;
 969                 if (GTK_CTREE_NODE_PREV (sibling) &&
 970                     GTK_CTREE_NODE_NEXT (GTK_CTREE_NODE_PREV (sibling)) == sibling) {
 971                         list = (GList *)GTK_CTREE_NODE_PREV (sibling);
 972                         list->next = (GList *)node;
 973                 }
 974
 975                 list = (GList *)node;
 976                 list->prev = (GList *)GTK_CTREE_NODE_PREV (sibling);
 977                 list_end->next = (GList *)sibling;
 978                 list = (GList *)sibling;
 979                 list->prev = list_end;
 980                 if (parent && GTK_CTREE_ROW (parent)->children == sibling)
 981                         GTK_CTREE_ROW (parent)->children = node;
 982         }
 983         else {
 984                 if (work) {
 985                         /* find sibling */
 986                         while (GTK_CTREE_ROW (work)->sibling)
 987                         work = (GList *)(GTK_CTREE_ROW (work)->sibling);
 988                         GTK_CTREE_ROW (work)->sibling = node;
 989
 990                         /* find last visible child of sibling */
 991                         work = (GList *) gtk_ctree_last_visible (ctree,
 992                                GTK_CTREE_NODE (work));
 993
 994                         list_end->next = work->next;
 995                         if (work->next)
 996                                 list = work->next->prev = list_end;
 997                         work->next = (GList *)node;
 998                         list = (GList *)node;
 999                         list->prev = work;
1000                 }
1001                 else {
1002                         if (parent) {
1003                                 GTK_CTREE_ROW (parent)->children = node;
1004                                 list = (GList *)node;
1005                                 list->prev = (GList *)parent;
1006                                 if (GTK_CTREE_ROW (parent)->expanded) {
1007                                         list_end->next = (GList *)GTK_CTREE_NODE_NEXT (parent);
1008                                         if (GTK_CTREE_NODE_NEXT(parent)) {
1009                                                 list = (GList *)GTK_CTREE_NODE_NEXT (parent);
1010                                                 list->prev = list_end;
1011                                         }
1012                                         list = (GList *)parent;
1013                                         list->next = (GList *)node;
1014                                 }
1015                                 else
1016                                         list_end->next = NULL;
1017                         }
1018                         else {
1019                                 clist->row_list = (GList *)node;
1020                                 list = (GList *)node;
1021                                 list->prev = NULL;
1022                                 list_end->next = NULL;
1023                         }
1024                 }
1025         }
1026
1027         gtk_ctree_pre_recursive (ctree, node, tree_update_level, NULL);
1028
1029         if (clist->row_list_end == NULL ||
1030             clist->row_list_end->next == (GList *)node)
1031                 clist->row_list_end = list_end;
1032
1033         if (visible && update_focus_row) {
1034                 gint pos;
1035
1036                 pos = g_list_position (clist->row_list, (GList *)node);
1037
1038                 if (pos <= clist->focus_row) {
1039                         clist->focus_row += rows;
1040                         clist->undo_anchor = clist->focus_row;
1041                 }
1042         }
1043 }
1044
1045 static void
1046 tree_update_level (GtkCTree     *ctree,
1047                    GtkCTreeNode *node,
1048                    gpointer      data)
1049 {
1050         if (!node)
1051                 return;
1052
1053         if (GTK_CTREE_ROW (node)->parent)
1054                 GTK_CTREE_ROW (node)->level =
1055                 GTK_CTREE_ROW (GTK_CTREE_ROW (node)->parent)->level + 1;
1056         else
1057                 GTK_CTREE_ROW (node)->level = 1;
1058 }
1059
1060 static GtkCTreeNode *
1061 gtk_ctree_last_visible (GtkCTree     *ctree,
1062                         GtkCTreeNode *node)
1063 {
1064         GtkCTreeNode *work;
1065
1066         if (!node)
1067                 return NULL;
1068
1069         work = GTK_CTREE_ROW (node)->children;
1070
1071         if (!work || !GTK_CTREE_ROW (node)->expanded)
1072                 return node;
1073
1074         while (GTK_CTREE_ROW (work)->sibling)
1075                 work = GTK_CTREE_ROW (work)->sibling;
1076
1077         return gtk_ctree_last_visible (ctree, work);
1078 }