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
 238         GTK_CLIST(sctree)->focus_row = row;
 239
 240         GTK_CLIST_GET_CLASS(sctree)->refresh(GTK_CLIST(sctree));
 241
 242         if (!additive)
 243                 gtk_clist_unselect_all (GTK_CLIST (sctree));
 244
 245         if (!range) {
 246                 GtkCTreeNode *node;
 247
 248                 node = gtk_ctree_node_nth (GTK_CTREE(sctree), row);
 249
 250                 /*No need to manage overlapped list*/
 251                 if (additive) {
 252                         if (row_is_selected(sctree, row))
 253                                 gtk_clist_unselect_row (GTK_CLIST (sctree), row, col);
 254                         else
 255                                 g_signal_emit_by_name
 256                                         (G_OBJECT (sctree),
 257                                          "tree_select_row", node, col);
 258                 } else {
 259                         g_signal_emit_by_name
 260                                 (G_OBJECT (sctree),
 261                                  "tree_select_row", node, col);
 262                 }
 263                 sctree->anchor_row = node;
 264         } else
 265                 select_range (sctree, row);
 266
 267         gtk_clist_thaw (GTK_CLIST (sctree));
 268 }
 269
 270 /* Our handler for button_press events.  We override all of GtkCList's broken
 271  * behavior.
 272  */
 273 static gint
 274 gtk_sctree_button_press (GtkWidget *widget, GdkEventButton *event)
 275 {
 276         GtkSCTree *sctree;
 277         GtkCList *clist;
 278         gboolean on_row;
 279         gint row;
 280         gint col;
 281         gint retval;
 282
 283         g_return_val_if_fail (widget != NULL, FALSE);
 284         g_return_val_if_fail (GTK_IS_SCTREE (widget), FALSE);
 285         g_return_val_if_fail (event != NULL, FALSE);
 286
 287         sctree = GTK_SCTREE (widget);
 288         clist = GTK_CLIST (widget);
 289         retval = FALSE;
 290
 291         if (event->window != clist->clist_window)
 292                 return (* GTK_WIDGET_CLASS (parent_class)->button_press_event) (widget, event);
 293
 294         on_row = gtk_clist_get_selection_info (clist, event->x, event->y, &row, &col);
 295
 296         if (on_row && !GTK_WIDGET_HAS_FOCUS(widget))
 297                 gtk_widget_grab_focus (widget);
 298
 299         if (gtk_ctree_is_hot_spot (GTK_CTREE(sctree), event->x, event->y)) {
 300                 gtk_ctree_toggle_expansion
 301                         (GTK_CTREE(sctree),
 302                          gtk_ctree_node_nth(GTK_CTREE(sctree), row));
 303                 return TRUE;
 304         }
 305
 306         switch (event->type) {
 307         case GDK_BUTTON_PRESS:
 308                 if (event->button == 1 || event->button == 2) {
 309                         if (event->button == 2)
 310                                 event->state &= ~(GDK_SHIFT_MASK | GDK_CONTROL_MASK);
 311                         if (on_row) {
 312                                 /* Save the mouse info for DnD */
 313                                 sctree->dnd_press_button = event->button;
 314                                 sctree->dnd_press_x = event->x;
 315                                 sctree->dnd_press_y = event->y;
 316
 317                                 /* Handle selection */
 318                                 if ((row_is_selected (sctree, row)
 319                                      && !(event->state & (GDK_CONTROL_MASK | GDK_SHIFT_MASK)))
 320                                     || ((event->state & GDK_CONTROL_MASK)
 321                                         && !(event->state & GDK_SHIFT_MASK))) {
 322                                         sctree->dnd_select_pending = TRUE;
 323                                         sctree->dnd_select_pending_state = event->state;
 324                                         sctree->dnd_select_pending_row = row;
 325                                 } else
 326                                         select_row (sctree, row, col, event->state);
 327                         } else
 328                                 gtk_clist_unselect_all (clist);
 329
 330                         retval = TRUE;
 331                 } else if (event->button == 3) {
 332                         /* Emit *_popup_menu signal*/
 333                         if (on_row) {
 334                                 if (!row_is_selected(sctree,row))
 335                                         select_row (sctree, row, col, 0);
 336                                 g_signal_emit (G_OBJECT (sctree),
 337                                                  sctree_signals[ROW_POPUP_MENU],
 338                                                  0, event);
 339                         } else {
 340                                 gtk_clist_unselect_all(clist);
 341                                 g_signal_emit (G_OBJECT (sctree),
 342                                                  sctree_signals[EMPTY_POPUP_MENU],
 343                                                  0, event);
 344                         }
 345                         retval = TRUE;
 346                 }
 347
 348                 break;
 349
 350         case GDK_2BUTTON_PRESS:
 351                 if (event->button != 1)
 352                         break;
 353
 354                 sctree->dnd_select_pending = FALSE;
 355                 sctree->dnd_select_pending_state = 0;
 356
 357                 if (on_row)
 358                         g_signal_emit (G_OBJECT (sctree),
 359                                        sctree_signals[OPEN_ROW], 0);
 360
 361                 retval = TRUE;
 362                 break;
 363
 364         default:
 365                 break;
 366         }
 367
 368         return retval;
 369 }
 370
 371 /* Our handler for button_release events.  We override all of GtkCList's broken
 372  * behavior.
 373  */
 374 static gint
 375 gtk_sctree_button_release (GtkWidget *widget, GdkEventButton *event)
 376 {
 377         GtkSCTree *sctree;
 378         GtkCList *clist;
 379         gint on_row;
 380         gint row, col;
 381         gint retval;
 382
 383         g_return_val_if_fail (widget != NULL, FALSE);
 384         g_return_val_if_fail (GTK_IS_SCTREE (widget), FALSE);
 385         g_return_val_if_fail (event != NULL, FALSE);
 386
 387         sctree = GTK_SCTREE (widget);
 388         clist = GTK_CLIST (widget);
 389         retval = FALSE;
 390
 391         if (event->window != clist->clist_window)
 392                 return (* GTK_WIDGET_CLASS (parent_class)->button_release_event) (widget, event);
 393
 394         on_row = gtk_clist_get_selection_info (clist, event->x, event->y, &row, &col);
 395
 396         if (!(event->button == 1 || event->button == 2))
 397                 return FALSE;
 398
 399         sctree->dnd_press_button = 0;
 400         sctree->dnd_press_x = 0;
 401         sctree->dnd_press_y = 0;
 402
 403         if (on_row) {
 404                 if (sctree->dnd_select_pending) {
 405                         select_row (sctree, row, col, sctree->dnd_select_pending_state);
 406                         sctree->dnd_select_pending = FALSE;
 407                         sctree->dnd_select_pending_state = 0;
 408                 }
 409
 410                 retval = TRUE;
 411         }
 412
 413         return retval;
 414 }
 415
 416 /* Our handler for motion_notify events.  We override all of GtkCList's broken
 417  * behavior.
 418  */
 419 static gint
 420 gtk_sctree_motion (GtkWidget *widget, GdkEventMotion *event)
 421 {
 422         GtkSCTree *sctree;
 423         GtkCList *clist;
 424
 425         g_return_val_if_fail (widget != NULL, FALSE);
 426         g_return_val_if_fail (GTK_IS_SCTREE (widget), FALSE);
 427         g_return_val_if_fail (event != NULL, FALSE);
 428
 429         sctree = GTK_SCTREE (widget);
 430         clist = GTK_CLIST (widget);
 431
 432         if (event->window != clist->clist_window)
 433                 return (* GTK_WIDGET_CLASS (parent_class)->motion_notify_event) (widget, event);
 434
 435         if (!((sctree->dnd_press_button == 1 && (event->state & GDK_BUTTON1_MASK))
 436               || (sctree->dnd_press_button == 2 && (event->state & GDK_BUTTON2_MASK))))
 437                 return FALSE;
 438
 439         /* This is the same threshold value that is used in gtkdnd.c */
 440
 441         if (MAX (ABS (sctree->dnd_press_x - event->x),
 442                  ABS (sctree->dnd_press_y - event->y)) <= 3)
 443                 return FALSE;
 444
 445         /* Handle any pending selections */
 446
 447         if (sctree->dnd_select_pending) {
 448                 if (!row_is_selected(sctree,sctree->dnd_select_pending_row))
 449                         select_row (sctree,
 450                                     sctree->dnd_select_pending_row,
 451                                     -1,
 452                                     sctree->dnd_select_pending_state);
 453
 454                 sctree->dnd_select_pending = FALSE;
 455                 sctree->dnd_select_pending_state = 0;
 456         }
 457
 458         g_signal_emit (G_OBJECT (sctree),
 459                        sctree_signals[START_DRAG],
 460                        0,
 461                        sctree->dnd_press_button,
 462                        event);
 463         return TRUE;
 464 }
 465
 466 /* We override the drag_begin signal to do nothing */
 467 static void
 468 gtk_sctree_drag_begin (GtkWidget *widget, GdkDragContext *context)
 469 {
 470         /* nothing */
 471 }
 472
 473 /* We override the drag_end signal to do nothing */
 474 static void
 475 gtk_sctree_drag_end (GtkWidget *widget, GdkDragContext *context)
 476 {
 477         /* nothing */
 478 }
 479
 480 /* We override the drag_data_get signal to do nothing */
 481 static void
 482 gtk_sctree_drag_data_get (GtkWidget *widget, GdkDragContext *context,
 483                                      GtkSelectionData *data, guint info, guint time)
 484 {
 485         /* nothing */
 486 }
 487
 488 /* We override the drag_leave signal to do nothing */
 489 static void
 490 gtk_sctree_drag_leave (GtkWidget *widget, GdkDragContext *context, guint time)
 491 {
 492         /* nothing */
 493 }
 494
 495 /* We override the drag_motion signal to do nothing */
 496 static gboolean
 497 gtk_sctree_drag_motion (GtkWidget *widget, GdkDragContext *context,
 498                                    gint x, gint y, guint time)
 499 {
 500         return FALSE;
 501 }
 502
 503 /* We override the drag_drop signal to do nothing */
 504 static gboolean
 505 gtk_sctree_drag_drop (GtkWidget *widget, GdkDragContext *context,
 506                                  gint x, gint y, guint time)
 507 {
 508         return FALSE;
 509 }
 510
 511 /* We override the drag_data_received signal to do nothing */
 512 static void
 513 gtk_sctree_drag_data_received (GtkWidget *widget, GdkDragContext *context,
 514                                           gint x, gint y, GtkSelectionData *data,
 515                                           guint info, guint time)
 516 {
 517         /* nothing */
 518 }
 519
 520 /* Our handler for the clear signal of the clist.  We have to reset the anchor
 521  * to null.
 522  */
 523 static void
 524 gtk_sctree_clear (GtkCList *clist)
 525 {
 526         GtkSCTree *sctree;
 527
 528         g_return_if_fail (clist != NULL);
 529         g_return_if_fail (GTK_IS_SCTREE (clist));
 530
 531         sctree = GTK_SCTREE (clist);
 532         sctree->anchor_row = NULL;
 533
 534         if (((GtkCListClass *)parent_class)->clear)
 535                 (* ((GtkCListClass *)parent_class)->clear) (clist);
 536 }
 537
 538 /* Our handler for the change_focus_row_expansion signal of the ctree.
 539  We have to set the anchor to parent visible node.
 540  */
 541 static void
 542 gtk_sctree_collapse (GtkCTree *ctree, GtkCTreeNode *node)
 543 {
 544         g_return_if_fail (ctree != NULL);
 545         g_return_if_fail (GTK_IS_SCTREE (ctree));
 546
 547         (* parent_class->tree_collapse) (ctree, node);
 548         GTK_SCTREE(ctree)->anchor_row =
 549                 gtk_ctree_node_nth(ctree, GTK_CLIST(ctree)->focus_row);
 550 }
 551
 552 GtkWidget *gtk_sctree_new_with_titles (gint columns, gint tree_column,
 553                                        gchar *titles[])
 554 {
 555 #if 0
 556         GtkSCTree* sctree;
 557
 558         sctree = gtk_type_new (gtk_sctree_get_type ());
 559         gtk_ctree_construct (GTK_CTREE (sctree), columns, tree_column, titles);
 560
 561         gtk_clist_set_selection_mode(GTK_CLIST(sctree), GTK_SELECTION_EXTENDED);
 562
 563         return GTK_WIDGET (sctree);
 564 #else
 565         GtkWidget *widget;
 566
 567         g_return_val_if_fail (columns > 0, NULL);
 568         g_return_val_if_fail (tree_column >= 0, NULL);
 569
 570         widget = gtk_widget_new (TYPE_GTK_SCTREE,
 571                                  "n_columns", columns,
 572                                  "tree_column", tree_column,
 573                                  NULL);
 574         if (titles) {
 575                 GtkCList *clist = GTK_CLIST (widget);
 576                 guint i;
 577
 578                 for (i = 0; i < columns; i++)
 579                         gtk_clist_set_column_title (clist, i, titles[i]);
 580                 gtk_clist_column_titles_show (clist);
 581         }
 582
 583         return widget;
 584 #endif
 585 }
 586
 587 void gtk_sctree_select (GtkSCTree *sctree, GtkCTreeNode *node)
 588 {
 589         select_row(sctree,
 590                    g_list_position(GTK_CLIST(sctree)->row_list, (GList *)node),
 591                    -1, 0);
 592 }
 593
 594 void gtk_sctree_select_with_state (GtkSCTree *sctree, GtkCTreeNode *node, int state)
 595 {
 596         select_row(sctree,
 597                    g_list_position(GTK_CLIST(sctree)->row_list, (GList *)node),
 598                    -1, state);
 599 }
 600
 601 void gtk_sctree_unselect_all (GtkSCTree *sctree)
 602 {
 603         gtk_clist_unselect_all(GTK_CLIST(sctree));
 604         sctree->anchor_row = NULL;
 605 }
 606
 607 void gtk_sctree_set_anchor_row (GtkSCTree *sctree, GtkCTreeNode *node)
 608 {
 609         sctree->anchor_row = node;
 610 }
 611
 612 /***********************************************************
 613  *             Tree sorting functions                      *
 614  ***********************************************************/
 615
 616 static void sink(GtkCList *clist, GPtrArray *numbers, gint root, gint bottom)
 617 {
 618         gint j, k ;
 619         GtkCTreeNode *temp;
 620
 621         j = 2 * root;
 622         k = j + 1;
 623
 624         /* find the maximum element of numbers[root],
 625            numbers[2*root] and numbers[2*root+1] */
 626         if (j <= bottom) {
 627                 if (clist->compare( clist, GTK_CTREE_ROW (g_ptr_array_index(numbers, root)),
 628                                     GTK_CTREE_ROW(g_ptr_array_index( numbers, j))) >= 0)
 629                         j = root;
 630                 if (k <= bottom)
 631                         if (clist->compare( clist, GTK_CTREE_ROW (g_ptr_array_index(numbers, k)),
 632                                             GTK_CTREE_ROW (g_ptr_array_index( numbers, j))) > 0)
 633                                 j = k;
 634                 /* if numbers[root] wasn't the maximum element then
 635                    sink again */
 636                 if (root != j) {
 637                         temp = g_ptr_array_index( numbers,root);
 638                         g_ptr_array_index( numbers, root) = g_ptr_array_index( numbers, j);
 639                         g_ptr_array_index( numbers, j) = temp;
 640                         sink( clist, numbers, j, bottom);
 641                 }
 642         }
 643 }
 644
 645 static void heap_sort(GtkCList *clist, GPtrArray *numbers, gint array_size)
 646 {
 647         gint i;
 648         GtkCTreeNode *temp;
 649
 650         /* build the Heap */
 651         for (i = (array_size / 2); i >= 1; i--)
 652                 sink( clist, numbers, i, array_size);
 653         /* output the Heap */
 654         for (i = array_size; i >= 2; i--) {
 655                 temp = g_ptr_array_index( numbers, 1);
 656                 g_ptr_array_index( numbers, 1) = g_ptr_array_index( numbers, i);
 657                 g_ptr_array_index( numbers, i) = temp;
 658                 sink( clist, numbers, 1, i-1);
 659         }
 660 }
 661
 662 static void
 663 tree_sort (GtkCTree    *ctree,
 664            GtkCTreeNode *node,
 665            gpointer      data)
 666 {
 667         GtkCTreeNode *list_start, *work, *next;
 668         GPtrArray *row_array, *viewable_array;
 669         GtkCList *clist;
 670         gint i;
 671
 672
 673         clist = GTK_CLIST (ctree);
 674
 675         if (node)
 676                 work = GTK_CTREE_ROW (node)->children;
 677         else
 678                 work = GTK_CTREE_NODE (clist->row_list);
 679
 680         row_array = g_ptr_array_new();
 681         viewable_array = g_ptr_array_new();
 682
 683         if (work) {
 684                 g_ptr_array_add( row_array, NULL);
 685                 while (work) {
 686                         /* add all rows to row_array */
 687                         g_ptr_array_add( row_array, work);
 688                         if (GTK_CTREE_ROW (work)->parent && gtk_ctree_is_viewable( ctree, work))
 689                                 g_ptr_array_add( viewable_array, GTK_CTREE_ROW (work)->parent);
 690                         next = GTK_CTREE_ROW (work)->sibling;
 691                         gtk_ctree_unlink( ctree, work, FALSE);
 692                         work = next;
 693                 }
 694
 695                 heap_sort( clist, row_array, (row_array->len)-1);
 696
 697                 if (node)
 698                         list_start = GTK_CTREE_ROW (node)->children;
 699                 else
 700                         list_start = GTK_CTREE_NODE (clist->row_list);
 701
 702                 if (clist->sort_type == GTK_SORT_ASCENDING) {
 703                         for (i=(row_array->len)-1; i>=1; i--) {
 704                                 work = g_ptr_array_index( row_array, i);
 705                                 gtk_ctree_link( ctree, work, node, list_start, FALSE);
 706                                 list_start = work;
 707                                 /* insert work at the beginning of the list */
 708                         }
 709                 } else {
 710                         for (i=1; i<row_array->len; i++) {
 711                                 work = g_ptr_array_index( row_array, i);
 712                                 gtk_ctree_link( ctree, work, node, list_start, FALSE);
 713                                 list_start = work;
 714                                 /* insert work at the beginning of the list */
 715                         }
 716                 }
 717
 718                 for (i=0; i<viewable_array->len; i++) {
 719                         gtk_ctree_expand( ctree, g_ptr_array_index( viewable_array, i));
 720                 }
 721
 722         }
 723
 724         g_ptr_array_free( row_array, TRUE);
 725         g_ptr_array_free( viewable_array, TRUE);
 726 }
 727
 728 void
 729 gtk_sctree_sort_recursive (GtkCTree     *ctree,
 730                           GtkCTreeNode *node)
 731 {
 732         GtkCList *clist;
 733         GtkCTreeNode *focus_node = NULL;
 734
 735         g_return_if_fail (ctree != NULL);
 736         g_return_if_fail (GTK_IS_CTREE (ctree));
 737
 738         clist = GTK_CLIST (ctree);
 739
 740         gtk_clist_freeze (clist);
 741
 742         if (clist->selection_mode == GTK_SELECTION_EXTENDED) {
 743                 GTK_CLIST_GET_CLASS (clist)->resync_selection (clist, NULL);
 744
 745                 g_list_free (clist->undo_selection);
 746                 g_list_free (clist->undo_unselection);
 747                 clist->undo_selection = NULL;
 748                 clist->undo_unselection = NULL;
 749         }
 750
 751         if (!node || (node && gtk_ctree_is_viewable (ctree, node)))
 752                 focus_node = GTK_CTREE_NODE (g_list_nth (clist->row_list, clist->focus_row));
 753
 754         gtk_ctree_post_recursive (ctree, node, GTK_CTREE_FUNC (tree_sort), NULL);
 755
 756         if (!node)
 757                 tree_sort (ctree, NULL, NULL);
 758
 759         if (focus_node) {
 760                 clist->focus_row = g_list_position (clist->row_list,(GList *)focus_node);
 761                 clist->undo_anchor = clist->focus_row;
 762         }
 763
 764         gtk_clist_thaw (clist);
 765 }
 766
 767 void
 768 gtk_sctree_sort_node (GtkCTree     *ctree,
 769                      GtkCTreeNode *node)
 770 {
 771         GtkCList *clist;
 772         GtkCTreeNode *focus_node = NULL;
 773
 774         g_return_if_fail (ctree != NULL);
 775         g_return_if_fail (GTK_IS_CTREE (ctree));
 776
 777         clist = GTK_CLIST (ctree);
 778
 779         gtk_clist_freeze (clist);
 780
 781         if (clist->selection_mode == GTK_SELECTION_EXTENDED) {
 782                 GTK_CLIST_GET_CLASS (clist)->resync_selection (clist, NULL);
 783
 784                 g_list_free (clist->undo_selection);
 785                 g_list_free (clist->undo_unselection);
 786                 clist->undo_selection = NULL;
 787                 clist->undo_unselection = NULL;
 788         }
 789
 790         if (!node || (node && gtk_ctree_is_viewable (ctree, node)))
 791                 focus_node = GTK_CTREE_NODE (g_list_nth (clist->row_list, clist->focus_row));
 792
 793         tree_sort (ctree, node, NULL);
 794
 795         if (focus_node) {
 796                 clist->focus_row = g_list_position (clist->row_list,(GList *)focus_node);
 797                 clist->undo_anchor = clist->focus_row;
 798         }
 799
 800         gtk_clist_thaw (clist);
 801 }
 802
 803 /************************************************************************/
 804
 805 static void
 806 gtk_ctree_unlink (GtkCTree     *ctree,
 807                   GtkCTreeNode *node,
 808                   gboolean      update_focus_row)
 809 {
 810         GtkCList *clist;
 811         gint rows;
 812         gint level;
 813         gint visible;
 814         GtkCTreeNode *work;
 815         GtkCTreeNode *parent;
 816         GList *list;
 817
 818         g_return_if_fail (ctree != NULL);
 819         g_return_if_fail (GTK_IS_CTREE (ctree));
 820         g_return_if_fail (node != NULL);
 821
 822         clist = GTK_CLIST (ctree);
 823
 824         if (update_focus_row && clist->selection_mode == GTK_SELECTION_EXTENDED) {
 825                 GTK_CLIST_GET_CLASS (clist)->resync_selection (clist, NULL);
 826
 827                 g_list_free (clist->undo_selection);
 828                 g_list_free (clist->undo_unselection);
 829                 clist->undo_selection = NULL;
 830                 clist->undo_unselection = NULL;
 831         }
 832
 833         visible = gtk_ctree_is_viewable (ctree, node);
 834
 835         /* clist->row_list_end unlinked ? */
 836         if (visible && (GTK_CTREE_NODE_NEXT (node) == NULL ||
 837            (GTK_CTREE_ROW (node)->children && gtk_ctree_is_ancestor (ctree, node,
 838             GTK_CTREE_NODE (clist->row_list_end)))))
 839                 clist->row_list_end = (GList *) (GTK_CTREE_NODE_PREV (node));
 840
 841         /* update list */
 842         rows = 0;
 843         level = GTK_CTREE_ROW (node)->level;
 844         work = GTK_CTREE_NODE_NEXT (node);
 845         while (work && GTK_CTREE_ROW (work)->level > level) {
 846                 work = GTK_CTREE_NODE_NEXT (work);
 847                 rows++;
 848         }
 849
 850         if (visible) {
 851                 clist->rows -= (rows + 1);
 852
 853                 if (update_focus_row) {
 854                         gint pos;
 855
 856                         pos = g_list_position (clist->row_list, (GList *)node);
 857                         if (pos + rows < clist->focus_row)
 858                                 clist->focus_row -= (rows + 1);
 859                         else if (pos <= clist->focus_row) {
 860                                 if (!GTK_CTREE_ROW (node)->sibling)
 861                                         clist->focus_row = MAX (pos - 1, 0);
 862                                 else
 863                                         clist->focus_row = pos;
 864
 865                                 clist->focus_row = MIN (clist->focus_row, clist->rows - 1);
 866                         }
 867                         clist->undo_anchor = clist->focus_row;
 868                 }
 869         }
 870
 871         if (work) {
 872                 list = (GList *)GTK_CTREE_NODE_PREV (work);
 873                 list->next = NULL;
 874                 list = (GList *)work;
 875                 list->prev = (GList *)GTK_CTREE_NODE_PREV (node);
 876         }
 877
 878         if (GTK_CTREE_NODE_PREV (node) &&
 879             GTK_CTREE_NODE_NEXT (GTK_CTREE_NODE_PREV (node)) == node) {
 880                 list = (GList *)GTK_CTREE_NODE_PREV (node);
 881                 list->next = (GList *)work;
 882         }
 883
 884         /* update tree */
 885         parent = GTK_CTREE_ROW (node)->parent;
 886         if (parent) {
 887                 if (GTK_CTREE_ROW (parent)->children == node) {
 888                         GTK_CTREE_ROW (parent)->children = GTK_CTREE_ROW (node)->sibling;
 889                         if (!GTK_CTREE_ROW (parent)->children)
 890                                 gtk_ctree_collapse (ctree, parent);
 891                 }
 892                 else {
 893                         GtkCTreeNode *sibling;
 894
 895                         sibling = GTK_CTREE_ROW (parent)->children;
 896                         while (GTK_CTREE_ROW (sibling)->sibling != node)
 897                                 sibling = GTK_CTREE_ROW (sibling)->sibling;
 898                         GTK_CTREE_ROW (sibling)->sibling = GTK_CTREE_ROW (node)->sibling;
 899                 }
 900         }
 901         else {
 902                 if (clist->row_list == (GList *)node)
 903                         clist->row_list = (GList *) (GTK_CTREE_ROW (node)->sibling);
 904                 else {
 905                         GtkCTreeNode *sibling;
 906
 907                         sibling = GTK_CTREE_NODE (clist->row_list);
 908                         while (GTK_CTREE_ROW (sibling)->sibling != node)
 909                                 sibling = GTK_CTREE_ROW (sibling)->sibling;
 910                         GTK_CTREE_ROW (sibling)->sibling = GTK_CTREE_ROW (node)->sibling;
 911                 }
 912         }
 913 }
 914
 915 static void
 916 gtk_ctree_link (GtkCTree     *ctree,
 917                 GtkCTreeNode *node,
 918                 GtkCTreeNode *parent,
 919                 GtkCTreeNode *sibling,
 920                 gboolean      update_focus_row)
 921 {
 922         GtkCList *clist;
 923         GList *list_end;
 924         GList *list;
 925         GList *work;
 926         gboolean visible = FALSE;
 927         gint rows = 0;
 928
 929         if (sibling)
 930                 g_return_if_fail (GTK_CTREE_ROW (sibling)->parent == parent);
 931         g_return_if_fail (node != NULL);
 932         g_return_if_fail (node != sibling);
 933         g_return_if_fail (node != parent);
 934
 935         clist = GTK_CLIST (ctree);
 936
 937         if (update_focus_row && clist->selection_mode == GTK_SELECTION_EXTENDED) {
 938                 GTK_CLIST_GET_CLASS (clist)->resync_selection (clist, NULL);
 939
 940                 g_list_free (clist->undo_selection);
 941                 g_list_free (clist->undo_unselection);
 942                 clist->undo_selection = NULL;
 943                 clist->undo_unselection = NULL;
 944         }
 945
 946         for (rows = 1, list_end = (GList *)node; list_end->next;
 947              list_end = list_end->next)
 948                 rows++;
 949
 950         GTK_CTREE_ROW (node)->parent = parent;
 951         GTK_CTREE_ROW (node)->sibling = sibling;
 952
 953         if (!parent || (parent && (gtk_ctree_is_viewable (ctree, parent) &&
 954             GTK_CTREE_ROW (parent)->expanded))) {
 955                 visible = TRUE;
 956                 clist->rows += rows;
 957         }
 958
 959         if (parent)
 960                 work = (GList *)(GTK_CTREE_ROW (parent)->children);
 961         else
 962                 work = clist->row_list;
 963
 964         if (sibling) {
 965                 if (work != (GList *)sibling) {
 966                         while (GTK_CTREE_ROW (work)->sibling != sibling)
 967                                 work = (GList *)(GTK_CTREE_ROW (work)->sibling);
 968                         GTK_CTREE_ROW (work)->sibling = node;
 969                 }
 970
 971                 if (sibling == GTK_CTREE_NODE (clist->row_list))
 972                 clist->row_list = (GList *) node;
 973                 if (GTK_CTREE_NODE_PREV (sibling) &&
 974                     GTK_CTREE_NODE_NEXT (GTK_CTREE_NODE_PREV (sibling)) == sibling) {
 975                         list = (GList *)GTK_CTREE_NODE_PREV (sibling);
 976                         list->next = (GList *)node;
 977                 }
 978
 979                 list = (GList *)node;
 980                 list->prev = (GList *)GTK_CTREE_NODE_PREV (sibling);
 981                 list_end->next = (GList *)sibling;
 982                 list = (GList *)sibling;
 983                 list->prev = list_end;
 984                 if (parent && GTK_CTREE_ROW (parent)->children == sibling)
 985                         GTK_CTREE_ROW (parent)->children = node;
 986         }
 987         else {
 988                 if (work) {
 989                         /* find sibling */
 990                         while (GTK_CTREE_ROW (work)->sibling)
 991                         work = (GList *)(GTK_CTREE_ROW (work)->sibling);
 992                         GTK_CTREE_ROW (work)->sibling = node;
 993
 994                         /* find last visible child of sibling */
 995                         work = (GList *) gtk_ctree_last_visible (ctree,
 996                                GTK_CTREE_NODE (work));
 997
 998                         list_end->next = work->next;
 999                         if (work->next)
1000                                 list = work->next->prev = list_end;
1001                         work->next = (GList *)node;
1002                         list = (GList *)node;
1003                         list->prev = work;
1004                 }
1005                 else {
1006                         if (parent) {
1007                                 GTK_CTREE_ROW (parent)->children = node;
1008                                 list = (GList *)node;
1009                                 list->prev = (GList *)parent;
1010                                 if (GTK_CTREE_ROW (parent)->expanded) {
1011                                         list_end->next = (GList *)GTK_CTREE_NODE_NEXT (parent);
1012                                         if (GTK_CTREE_NODE_NEXT(parent)) {
1013                                                 list = (GList *)GTK_CTREE_NODE_NEXT (parent);
1014                                                 list->prev = list_end;
1015                                         }
1016                                         list = (GList *)parent;
1017                                         list->next = (GList *)node;
1018                                 }
1019                                 else
1020                                         list_end->next = NULL;
1021                         }
1022                         else {
1023                                 clist->row_list = (GList *)node;
1024                                 list = (GList *)node;
1025                                 list->prev = NULL;
1026                                 list_end->next = NULL;
1027                         }
1028                 }
1029         }
1030
1031         gtk_ctree_pre_recursive (ctree, node, tree_update_level, NULL);
1032
1033         if (clist->row_list_end == NULL ||
1034             clist->row_list_end->next == (GList *)node)
1035                 clist->row_list_end = list_end;
1036
1037         if (visible && update_focus_row) {
1038                 gint pos;
1039
1040                 pos = g_list_position (clist->row_list, (GList *)node);
1041
1042                 if (pos <= clist->focus_row) {
1043                         clist->focus_row += rows;
1044                         clist->undo_anchor = clist->focus_row;
1045                 }
1046         }
1047 }
1048
1049 static void
1050 tree_update_level (GtkCTree     *ctree,
1051                    GtkCTreeNode *node,
1052                    gpointer      data)
1053 {
1054         if (!node)
1055                 return;
1056
1057         if (GTK_CTREE_ROW (node)->parent)
1058                 GTK_CTREE_ROW (node)->level =
1059                 GTK_CTREE_ROW (GTK_CTREE_ROW (node)->parent)->level + 1;
1060         else
1061                 GTK_CTREE_ROW (node)->level = 1;
1062 }
1063
1064 static GtkCTreeNode *
1065 gtk_ctree_last_visible (GtkCTree     *ctree,
1066                         GtkCTreeNode *node)
1067 {
1068         GtkCTreeNode *work;
1069
1070         if (!node)
1071                 return NULL;
1072
1073         work = GTK_CTREE_ROW (node)->children;
1074
1075         if (!work || !GTK_CTREE_ROW (node)->expanded)
1076                 return node;
1077
1078         while (GTK_CTREE_ROW (work)->sibling)
1079                 work = GTK_CTREE_ROW (work)->sibling;
1080
1081         return gtk_ctree_last_visible (ctree, work);
1082 }