pintos-os.org Git - pspp/blob - src/ui/gui/psppire-window.c

   1 /* PSPPIRE - a graphical user interface for PSPP.
   2    Copyright (C) 2009, 2010, 2011, 2013, 2014  Free Software Foundation
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
  16
  17 #include <config.h>
  18 #include <gl/relocatable.h>
  19
  20 #include "psppire-window.h"
  21 #include "psppire-window-base.h"
  22
  23 #include <gtk/gtk.h>
  24
  25 #include <stdlib.h>
  26
  27 #include <gettext.h>
  28 #define _(msgid) gettext (msgid)
  29 #define N_(msgid) msgid
  30
  31 #include "data/any-reader.h"
  32 #include "data/file-handle-def.h"
  33 #include "data/dataset.h"
  34 #include "libpspp/version.h"
  35 #include "output/group-item.h"
  36 #include "output/pivot-table.h"
  37 #include "output/spv/spv.h"
  38 #include "output/spv/spv-output.h"
  39 #include "output/spv/spv-select.h"
  40
  41 #include "helper.h"
  42 #include "psppire-data-window.h"
  43 #include "psppire-encoding-selector.h"
  44 #include "psppire-syntax-window.h"
  45 #include "psppire-window-register.h"
  46
  47 static void psppire_window_base_init     (PsppireWindowClass *class);
  48 static void psppire_window_class_init    (PsppireWindowClass *class);
  49 static void psppire_window_init          (PsppireWindow      *window);
  50
  51
  52 static GObjectClass *parent_class;
  53
  54 GType
  55 psppire_window_get_type (void)
  56 {
  57   static GType psppire_window_type = 0;
  58
  59   if (!psppire_window_type)
  60     {
  61       static const GTypeInfo psppire_window_info =
  62       {
  63         sizeof (PsppireWindowClass),
  64         (GBaseInitFunc) psppire_window_base_init,
  65         (GBaseFinalizeFunc) NULL,
  66         (GClassInitFunc) psppire_window_class_init,
  67         (GClassFinalizeFunc) NULL,
  68         NULL,
  69         sizeof (PsppireWindow),
  70         0,
  71         (GInstanceInitFunc) psppire_window_init,
  72       };
  73
  74       psppire_window_type =
  75         g_type_register_static (PSPPIRE_TYPE_WINDOW_BASE, "PsppireWindow",
  76                                 &psppire_window_info, G_TYPE_FLAG_ABSTRACT);
  77     }
  78
  79   return psppire_window_type;
  80 }
  81
  82
  83 /* Properties */
  84 enum
  85 {
  86   PROP_0,
  87   PROP_FILENAME,
  88   PROP_DESCRIPTION,
  89   PROP_ID
  90 };
  91
  92
  93 static void
  94 psppire_window_set_title (PsppireWindow *window)
  95 {
  96   GString *title = g_string_sized_new (80);
  97
  98   if (window->dirty)
  99     g_string_append_c (title, '*');
 100
 101   if (window->basename || window->id)
 102     {
 103       if (window->basename)
 104         g_string_append_printf (title, "%s ", window->basename);
 105
 106       if (window->id)
 107         g_string_append_printf (title, "[%s] ", window->id);
 108
 109       g_string_append_unichar (title, 0x2014); /* em dash */
 110       g_string_append_c (title, ' '); /* em dash */
 111     }
 112
 113   g_string_append_printf (title, "PSPPIRE %s", window->description);
 114
 115   int minor = 1;
 116   sscanf (bare_version, "%*d.%d.%*d", &minor);
 117   if (minor % 2)
 118     g_string_append_printf (title, " - Test version! Please report bugs to %s", PACKAGE_BUGREPORT);
 119
 120   gtk_window_set_title (GTK_WINDOW (window), title->str);
 121
 122   g_string_free (title, TRUE);
 123 }
 124
 125 static void
 126 psppire_window_update_list_name (PsppireWindow *window)
 127 {
 128   PsppireWindowRegister *reg = psppire_window_register_new ();
 129   GString *candidate = g_string_sized_new (80);
 130   int n;
 131
 132   n = 1;
 133   do
 134     {
 135       /* Compose a name. */
 136       g_string_truncate (candidate, 0);
 137       if (window->filename)
 138         {
 139           gchar *display_filename = g_filename_display_name (window->filename);
 140           g_string_append (candidate, display_filename);
 141           g_free (display_filename);
 142
 143           if (window->id)
 144             g_string_append_printf (candidate, " [%s]", window->id);
 145         }
 146       else if (window->id)
 147         g_string_append_printf (candidate, "[%s]", window->id);
 148       else
 149         g_string_append (candidate, window->description);
 150
 151       if (n++ > 1)
 152         g_string_append_printf (candidate, " #%d", n);
 153
 154       if (window->list_name && !strcmp (candidate->str, window->list_name))
 155         {
 156           /* Keep the existing name. */
 157           g_string_free (candidate, TRUE);
 158           return;
 159         }
 160     }
 161   while (psppire_window_register_lookup (reg, candidate->str));
 162
 163   if (window->list_name)
 164     psppire_window_register_remove (reg, window->list_name);
 165
 166   g_free (window->list_name);
 167   window->list_name = g_string_free (candidate, FALSE);
 168
 169   psppire_window_register_insert (reg, window, window->list_name);
 170 }
 171
 172 static void
 173 psppire_window_name_changed (PsppireWindow *window)
 174 {
 175   psppire_window_set_title (window);
 176   psppire_window_update_list_name (window);
 177 }
 178
 179 static void
 180 psppire_window_set_property (GObject         *object,
 181                              guint            prop_id,
 182                              const GValue    *value,
 183                              GParamSpec      *pspec)
 184 {
 185   PsppireWindow *window = PSPPIRE_WINDOW (object);
 186
 187   switch (prop_id)
 188     {
 189     case PROP_DESCRIPTION:
 190       g_free (window->description);
 191       window->description = g_value_dup_string (value);
 192       psppire_window_set_title (window);
 193       break;
 194     case PROP_FILENAME:
 195       g_free (window->filename);
 196       window->filename = g_value_dup_string (value);
 197       g_free (window->basename);
 198       window->basename = (window->filename
 199                           ? g_filename_display_basename (window->filename)
 200                           : NULL);
 201       psppire_window_name_changed (window);
 202       break;
 203     case PROP_ID:
 204       g_free (window->id);
 205       window->id = g_value_dup_string (value);
 206       psppire_window_name_changed (window);
 207       break;
 208     default:
 209       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 210       break;
 211     };
 212 }
 213
 214
 215 static void
 216 psppire_window_get_property (GObject         *object,
 217                              guint            prop_id,
 218                              GValue          *value,
 219                              GParamSpec      *pspec)
 220 {
 221   PsppireWindow *window = PSPPIRE_WINDOW (object);
 222
 223   switch (prop_id)
 224     {
 225     case PROP_FILENAME:
 226       g_value_set_string (value, window->filename);
 227       break;
 228     case PROP_DESCRIPTION:
 229       g_value_set_string (value, window->description);
 230       break;
 231     case PROP_ID:
 232       g_value_set_string (value, window->id);
 233       break;
 234     default:
 235       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 236       break;
 237     };
 238 }
 239
 240
 241 static void
 242 psppire_window_finalize (GObject *object)
 243 {
 244   PsppireWindow *window = PSPPIRE_WINDOW (object);
 245
 246   PsppireWindowRegister *reg = psppire_window_register_new ();
 247
 248   g_signal_handler_disconnect (reg, window->remove_handler);
 249   g_signal_handler_disconnect (reg, window->insert_handler);
 250   psppire_window_register_remove (reg, window->list_name);
 251   g_free (window->filename);
 252   g_free (window->basename);
 253   g_free (window->id);
 254   g_free (window->description);
 255   g_free (window->list_name);
 256
 257   g_hash_table_destroy (window->menuitem_table);
 258
 259   if (G_OBJECT_CLASS (parent_class)->finalize)
 260     G_OBJECT_CLASS (parent_class)->finalize (object);
 261 }
 262
 263 static void
 264 psppire_window_class_init (PsppireWindowClass *class)
 265 {
 266   GObjectClass *object_class = G_OBJECT_CLASS (class);
 267
 268   GParamSpec *description_spec =
 269     null_if_empty_param ("description",
 270                        "Description",
 271                        "A string describing the usage of the window",
 272                          NULL, /*Should be overridden by derived classes */
 273                        G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE);
 274
 275   GParamSpec *filename_spec =
 276     null_if_empty_param ("filename",
 277                        "File name",
 278                        "The name of the file associated with this window, if any",
 279                          NULL,
 280                          G_PARAM_CONSTRUCT | G_PARAM_READWRITE);
 281
 282   GParamSpec *id_spec =
 283     null_if_empty_param ("id",
 284                          "Identifier",
 285                          "The PSPP language identifier for the data associated "
 286                          "with this window (e.g. dataset name)",
 287                          NULL,
 288                          G_PARAM_CONSTRUCT | G_PARAM_READWRITE);
 289
 290   object_class->set_property = psppire_window_set_property;
 291   object_class->get_property = psppire_window_get_property;
 292
 293   g_object_class_install_property (object_class,
 294                                    PROP_DESCRIPTION,
 295                                    description_spec);
 296
 297   g_object_class_install_property (object_class,
 298                                    PROP_FILENAME,
 299                                    filename_spec);
 300
 301   g_object_class_install_property (object_class,
 302                                    PROP_ID,
 303                                    id_spec);
 304
 305   parent_class = g_type_class_peek_parent (class);
 306 }
 307
 308
 309 static void
 310 psppire_window_base_init (PsppireWindowClass *class)
 311 {
 312   GObjectClass *object_class = G_OBJECT_CLASS (class);
 313
 314   object_class->finalize = psppire_window_finalize;
 315 }
 316
 317
 318
 319 static void
 320 insert_menuitem_into_menu (PsppireWindow *window, gpointer key)
 321 {
 322   gchar *filename;
 323   GtkWidget *item;
 324   filename = g_filename_display_name (key);
 325   item = gtk_check_menu_item_new_with_label (filename);
 326   g_free (filename);
 327
 328   g_hash_table_insert (window->menuitem_table, key, item);
 329 }
 330
 331 static void
 332 insert_item (gpointer key, gpointer value, gpointer data)
 333 {
 334   PsppireWindow *window = PSPPIRE_WINDOW (data);
 335
 336   if ( NULL != g_hash_table_lookup (window->menuitem_table, key))
 337     return;
 338
 339   insert_menuitem_into_menu (window, key);
 340 }
 341
 342 /* Insert a new item into the window menu */
 343 static void
 344 insert_menuitem (GObject *reg, const gchar *key, gpointer data)
 345 {
 346   PsppireWindow *window = PSPPIRE_WINDOW (data);
 347
 348   insert_menuitem_into_menu (window, (gpointer) key);
 349 }
 350
 351
 352 static void
 353 remove_menuitem (PsppireWindowRegister *reg, const gchar *key, gpointer data)
 354 {
 355   PsppireWindow *window = PSPPIRE_WINDOW (data);
 356   g_hash_table_remove (window->menuitem_table, key);
 357 }
 358
 359 static void
 360 insert_existing_items (PsppireWindow *window)
 361 {
 362   psppire_window_register_foreach (psppire_window_register_new (), insert_item, window);
 363 }
 364
 365
 366 static gboolean
 367 on_delete (PsppireWindow *w, GdkEvent *event, gpointer user_data)
 368 {
 369   PsppireWindowRegister *reg = psppire_window_register_new ();
 370
 371   if ( w->dirty )
 372     {
 373       gint response = psppire_window_query_save (w);
 374
 375       switch (response)
 376         {
 377         default:
 378         case GTK_RESPONSE_CANCEL:
 379           return TRUE;
 380           break;
 381         case GTK_RESPONSE_APPLY:
 382           psppire_window_save (w);
 383           if (w->dirty)
 384             {
 385               /* Save failed, or user exited Save As dialog with Cancel. */
 386               return TRUE;
 387             }
 388           break;
 389         case GTK_RESPONSE_REJECT:
 390           break;
 391         }
 392     }
 393
 394   if ( 1 == psppire_window_register_n_items (reg))
 395     gtk_main_quit ();
 396
 397   return FALSE;
 398 }
 399
 400
 401 static void
 402 psppire_window_init (PsppireWindow *window)
 403 {
 404   window->filename = NULL;
 405   window->basename = NULL;
 406   window->id = NULL;
 407   window->description = NULL;
 408   window->list_name = NULL;
 409
 410   window->menuitem_table  = g_hash_table_new (g_str_hash, g_str_equal);
 411
 412
 413   g_signal_connect (window,  "realize", G_CALLBACK (insert_existing_items), NULL);
 414
 415   window->insert_handler = g_signal_connect (psppire_window_register_new (),
 416                                              "inserted",
 417                                              G_CALLBACK (insert_menuitem),
 418                                              window);
 419
 420   window->remove_handler = g_signal_connect (psppire_window_register_new (),
 421                                              "removed",
 422                                              G_CALLBACK (remove_menuitem),
 423                                              window);
 424
 425   window->added_separator = FALSE;
 426   window->dirty = FALSE;
 427
 428   g_signal_connect_swapped (window, "delete-event", G_CALLBACK (on_delete), window);
 429
 430   g_object_set (window, "icon-name", "pspp", NULL);
 431 }
 432
 433 /*
 434    Ask the user if the buffer should be saved.
 435    Return the response.
 436 */
 437 gint
 438 psppire_window_query_save (PsppireWindow *se)
 439 {
 440   gint response;
 441   GtkWidget *dialog;
 442   GtkWidget *cancel_button;
 443
 444   gchar *description;
 445
 446   GTimeVal time;
 447
 448   g_get_current_time (&time);
 449
 450   if (se->filename)
 451     description = g_filename_display_basename (se->filename);
 452   else if (se->id)
 453     description = g_strdup (se->id);
 454   else
 455     description = g_strdup (se->description);
 456   dialog =
 457     gtk_message_dialog_new (GTK_WINDOW (se),
 458                             GTK_DIALOG_MODAL,
 459                             GTK_MESSAGE_WARNING,
 460                             GTK_BUTTONS_NONE,
 461                             _("Save the changes to `%s' before closing?"),
 462                             description);
 463   g_free (description);
 464
 465   g_object_set (dialog, "icon-name", "pspp", NULL);
 466
 467   gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog),
 468                                             _("If you don't save, changes from the last %ld seconds will be permanently lost."),
 469                                             time.tv_sec - se->savetime.tv_sec);
 470
 471   gtk_dialog_add_button  (GTK_DIALOG (dialog),
 472                           _("Close _without saving"),
 473                           GTK_RESPONSE_REJECT);
 474
 475   cancel_button = gtk_dialog_add_button  (GTK_DIALOG (dialog),
 476                                           _("Cancel"),
 477                                           GTK_RESPONSE_CANCEL);
 478
 479   gtk_dialog_add_button  (GTK_DIALOG (dialog),
 480                           _("Save"),
 481                           GTK_RESPONSE_APPLY);
 482
 483   gtk_widget_grab_focus (cancel_button);
 484
 485   response = gtk_dialog_run (GTK_DIALOG (dialog));
 486
 487   gtk_widget_destroy (dialog);
 488
 489   return response;
 490 }
 491
 492
 493 /* The return value is encoded in the glib filename encoding. */
 494 const gchar *
 495 psppire_window_get_filename (PsppireWindow *w)
 496 {
 497   return w->filename;
 498 }
 499
 500
 501 /* FILENAME must be encoded in the glib filename encoding. */
 502 void
 503 psppire_window_set_filename (PsppireWindow *w, const gchar *filename)
 504 {
 505   g_object_set (w, "filename", filename, NULL);
 506 }
 507
 508 void
 509 psppire_window_set_unsaved (PsppireWindow *w)
 510 {
 511   if ( w->dirty == FALSE)
 512     g_get_current_time (&w->savetime);
 513
 514   w->dirty = TRUE;
 515
 516   psppire_window_set_title (w);
 517 }
 518
 519 gboolean
 520 psppire_window_get_unsaved (PsppireWindow *w)
 521 {
 522   return w->dirty;
 523 }
 524
 525
 526 \f
 527
 528
 529 static void
 530 minimise_window (gpointer key, gpointer value, gpointer data)
 531 {
 532   gtk_window_iconify (GTK_WINDOW (value));
 533 }
 534
 535
 536 void
 537 psppire_window_minimise_all (void)
 538 {
 539   PsppireWindowRegister *reg = psppire_window_register_new ();
 540
 541   g_hash_table_foreach (reg->name_table, minimise_window, NULL);
 542 }
 543
 544
 545 \f
 546
 547 GType
 548 psppire_window_model_get_type (void)
 549 {
 550   static GType window_model_type = 0;
 551
 552   if (! window_model_type)
 553     {
 554       static const GTypeInfo window_model_info =
 555       {
 556         sizeof (PsppireWindowIface), /* class_size */
 557         NULL,           /* base_init */
 558         NULL,           /* base_finalize */
 559         NULL,
 560         NULL,           /* class_finalize */
 561         NULL,           /* class_data */
 562         0,
 563         0,              /* n_preallocs */
 564         NULL
 565       };
 566
 567       window_model_type =
 568         g_type_register_static (G_TYPE_INTERFACE, "PsppireWindowModel",
 569                                 &window_model_info, 0);
 570
 571       g_type_interface_add_prerequisite (window_model_type, G_TYPE_OBJECT);
 572     }
 573
 574   return window_model_type;
 575 }
 576
 577
 578 void
 579 psppire_window_save (PsppireWindow *w)
 580 {
 581   PsppireWindowIface *i = PSPPIRE_WINDOW_MODEL_GET_IFACE (w);
 582
 583   g_assert (i);
 584   g_return_if_fail (i->save);
 585
 586   if (w->filename == NULL)
 587     psppire_window_save_as (w);
 588   else
 589     {
 590       i->save (w);
 591       w->dirty = FALSE;
 592       psppire_window_set_title (w);
 593     }
 594 }
 595
 596 void
 597 psppire_window_save_as (PsppireWindow *w)
 598 {
 599   PsppireWindowIface *i = PSPPIRE_WINDOW_MODEL_GET_IFACE (w);
 600   gchar *old_filename;
 601
 602   g_assert (i);
 603   g_return_if_fail (i->pick_filename);
 604
 605   old_filename = w->filename;
 606   w->filename = NULL;
 607
 608   i->pick_filename (w);
 609   if (w->filename == NULL)
 610     w->filename = old_filename;
 611   else
 612     {
 613       g_free (old_filename);
 614       psppire_window_save (w);
 615     }
 616 }
 617
 618 static void delete_recent (const char *file_name);
 619
 620 gboolean
 621 psppire_window_load (PsppireWindow *w, const gchar *file,
 622                      const gchar *encoding, gpointer hint)
 623 {
 624   gboolean ok;
 625   PsppireWindowIface *i = PSPPIRE_WINDOW_MODEL_GET_IFACE (w);
 626
 627   g_assert (PSPPIRE_IS_WINDOW_MODEL (w));
 628
 629   g_assert (i);
 630
 631   g_return_val_if_fail (i->load, FALSE);
 632
 633   ok = i->load (w, file, encoding, hint);
 634
 635   if ( ok )
 636     {
 637       psppire_window_set_filename (w, file);
 638       w->dirty = FALSE;
 639     }
 640   else
 641     delete_recent (file);
 642
 643   return ok;
 644 }
 645
 646
 647 GtkWidget *
 648 psppire_window_file_chooser_dialog (PsppireWindow *toplevel)
 649 {
 650   GtkFileFilter *filter = gtk_file_filter_new ();
 651   GtkWidget *dialog =
 652     gtk_file_chooser_dialog_new (_("Open"),
 653                                  GTK_WINDOW (toplevel),
 654                                  GTK_FILE_CHOOSER_ACTION_OPEN,
 655                                  _("Cancel"), GTK_RESPONSE_CANCEL,
 656                                  _("Open"), GTK_RESPONSE_ACCEPT,
 657                                  NULL);
 658
 659   g_object_set (dialog, "local-only", FALSE, NULL);
 660
 661   gtk_file_filter_set_name (filter, _("Data and Syntax Files"));
 662   gtk_file_filter_add_mime_type (filter, "application/x-spss-sav");
 663   gtk_file_filter_add_mime_type (filter, "application/x-spss-por");
 664   gtk_file_filter_add_mime_type (filter, "application/x-spss-spv");
 665   gtk_file_filter_add_pattern (filter, "*.zsav");
 666   gtk_file_filter_add_pattern (filter, "*.sps");
 667   gtk_file_filter_add_pattern (filter, "*.SPS");
 668   gtk_file_filter_add_pattern (filter, "*.spv");
 669   gtk_file_filter_add_pattern (filter, "*.SPV");
 670   gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (dialog), filter);
 671
 672   filter = gtk_file_filter_new ();
 673   gtk_file_filter_set_name (filter, _("System Files (*.sav, *.zsav)"));
 674   gtk_file_filter_add_mime_type (filter, "application/x-spss-sav");
 675   gtk_file_filter_add_pattern (filter, "*.zsav");
 676   gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (dialog), filter);
 677
 678   filter = gtk_file_filter_new ();
 679   gtk_file_filter_set_name (filter, _("Portable Files (*.por) "));
 680   gtk_file_filter_add_mime_type (filter, "application/x-spss-por");
 681   gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (dialog), filter);
 682
 683   filter = gtk_file_filter_new ();
 684   gtk_file_filter_set_name (filter, _("Syntax Files (*.sps) "));
 685   gtk_file_filter_add_pattern (filter, "*.sps");
 686   gtk_file_filter_add_pattern (filter, "*.SPS");
 687   gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (dialog), filter);
 688
 689   filter = gtk_file_filter_new ();
 690   gtk_file_filter_set_name (filter, _("Output Files (*.spv) "));
 691   gtk_file_filter_add_pattern (filter, "*.spv");
 692   gtk_file_filter_add_pattern (filter, "*.SPV");
 693   gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (dialog), filter);
 694
 695   filter = gtk_file_filter_new ();
 696   gtk_file_filter_set_name (filter, _("All Files"));
 697   gtk_file_filter_add_pattern (filter, "*");
 698   gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (dialog), filter);
 699
 700   if (toplevel->filename)
 701     {
 702       const gchar *filename = toplevel->filename;
 703       gchar *dir_name;
 704
 705       if ( ! g_path_is_absolute (filename))
 706         {
 707           gchar *path =
 708             g_build_filename (g_get_current_dir (), filename, NULL);
 709           dir_name = g_path_get_dirname (path);
 710           g_free (path);
 711         }
 712       else
 713         {
 714           dir_name = g_path_get_dirname (filename);
 715         }
 716       gtk_file_chooser_set_current_folder (GTK_FILE_CHOOSER (dialog),
 717                                            dir_name);
 718       free (dir_name);
 719     }
 720
 721     gtk_file_chooser_set_extra_widget (
 722       GTK_FILE_CHOOSER (dialog),
 723       psppire_encoding_selector_new ("Auto", true));
 724
 725   return dialog;
 726 }
 727
 728 struct item_path
 729   {
 730     const struct spv_item **nodes;
 731     size_t n;
 732
 733 #define N_STUB 10
 734     const struct spv_item *stub[N_STUB];
 735   };
 736
 737 static void
 738 swap_nodes (const struct spv_item **a, const struct spv_item **b)
 739 {
 740   const struct spv_item *tmp = *a;
 741   *a = *b;
 742   *b = tmp;
 743 }
 744
 745 static void
 746 get_path (const struct spv_item *item, struct item_path *path)
 747 {
 748   size_t allocated = 10;
 749   path->nodes = path->stub;
 750   path->n = 0;
 751
 752   while (item)
 753     {
 754       if (path->n >= allocated)
 755         {
 756           if (path->nodes == path->stub)
 757             path->nodes = xmemdup (path->stub, sizeof path->stub);
 758           path->nodes = x2nrealloc (path->nodes, &allocated,
 759                                     sizeof *path->nodes);
 760         }
 761       path->nodes[path->n++] = item;
 762       item = item->parent;
 763     }
 764
 765   for (size_t i = 0; i < path->n / 2; i++)
 766     swap_nodes (&path->nodes[i], &path->nodes[path->n - i - 1]);
 767 }
 768
 769 static void
 770 free_path (struct item_path *path)
 771 {
 772   if (path && path->nodes != path->stub)
 773     free (path->nodes);
 774 }
 775
 776 static void
 777 dump_heading_transition (const struct spv_item *old,
 778                          const struct spv_item *new)
 779 {
 780   if (old == new)
 781     return;
 782
 783   struct item_path old_path, new_path;
 784   get_path (old, &old_path);
 785   get_path (new, &new_path);
 786
 787   size_t common = 0;
 788   for (; common < old_path.n && common < new_path.n; common++)
 789     if (old_path.nodes[common] != new_path.nodes[common])
 790       break;
 791
 792   for (size_t i = common; i < old_path.n; i++)
 793     group_close_item_submit (group_close_item_create ());
 794   for (size_t i = common; i < new_path.n; i++)
 795     group_open_item_submit (group_open_item_create (
 796                               new_path.nodes[i]->command_id));
 797
 798   free_path (&old_path);
 799   free_path (&new_path);
 800 }
 801
 802 void
 803 read_spv_file (const char *filename)
 804 {
 805   struct spv_reader *spv;
 806   char *error = spv_open (filename, &spv);
 807   if (error)
 808     {
 809       /* XXX */
 810       fprintf (stderr, "%s\n", error);
 811       return;
 812     }
 813
 814   struct spv_item **items;
 815   size_t n_items;
 816   spv_select (spv, NULL, 0, &items, &n_items);
 817   struct spv_item *prev_heading = spv_get_root (spv);
 818   for (size_t i = 0; i < n_items; i++)
 819     {
 820       struct spv_item *heading
 821         = items[i]->type == SPV_ITEM_HEADING ? items[i] : items[i]->parent;
 822       dump_heading_transition (prev_heading, heading);
 823       if (items[i]->type == SPV_ITEM_TEXT)
 824         spv_text_submit (items[i]);
 825       else if (items[i]->type == SPV_ITEM_TABLE)
 826         pivot_table_submit (spv_item_get_table (items[i]));
 827       prev_heading = heading;
 828     }
 829   dump_heading_transition (prev_heading, spv_get_root (spv));
 830   free (items);
 831   spv_close (spv);
 832 }
 833
 834 /* Callback for the file_open action.
 835    Prompts for a filename and opens it */
 836 void
 837 psppire_window_open (PsppireWindow *de)
 838 {
 839   GtkWidget *dialog = psppire_window_file_chooser_dialog (de);
 840
 841   gtk_file_chooser_add_shortcut_folder (GTK_FILE_CHOOSER (dialog), relocate (examples_dir), NULL);
 842
 843   switch (gtk_dialog_run (GTK_DIALOG (dialog)))
 844     {
 845     case GTK_RESPONSE_ACCEPT:
 846       {
 847         gchar *name =
 848           gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
 849
 850         const gchar **cs = NULL;
 851         g_get_filename_charsets (&cs);
 852
 853         gchar *encoding = psppire_encoding_selector_get_encoding (
 854           gtk_file_chooser_get_extra_widget (GTK_FILE_CHOOSER (dialog)));
 855
 856         struct file_handle *fh = fh_create_file (NULL, name, cs[0], fh_default_properties ());
 857
 858         int retval = any_reader_detect (fh, NULL);
 859         if (retval == 1)
 860           open_data_window (de, name, encoding, NULL);
 861         else if (retval == 0)
 862           {
 863             char *error = spv_detect (name);
 864             if (!error)
 865               read_spv_file (name);
 866             else
 867               {
 868                 free (error);
 869                 open_syntax_window (name, encoding);
 870               }
 871           }
 872
 873         g_free (encoding);
 874         fh_unref (fh);
 875         g_free (name);
 876       }
 877       break;
 878     default:
 879       break;
 880     }
 881
 882   gtk_widget_destroy (dialog);
 883 }
 884
 885
 886 /* Puts FILE_NAME (encoded in the glib file name encoding) into the recent list
 887    with associated MIME_TYPE.  If it's already in the list, it moves it to the
 888    top. */
 889 void
 890 add_most_recent (const char *file_name,
 891                  const char *mime_type, const char *encoding)
 892 {
 893   gchar *uri = g_filename_to_uri  (file_name, NULL, NULL);
 894   if ( uri )
 895     {
 896       GtkRecentData recent_data;
 897       gchar *full_mime_type;
 898
 899       if (encoding && encoding[0])
 900         full_mime_type = g_strdup_printf ("%s; charset=%s",
 901                                           mime_type, encoding);
 902       else
 903         full_mime_type = g_strdup (mime_type);
 904
 905       recent_data.display_name = NULL;
 906       recent_data.description = NULL;
 907       recent_data.mime_type = full_mime_type;
 908       recent_data.app_name = CONST_CAST (gchar *, g_get_application_name ());
 909       recent_data.app_exec = g_strjoin (" ", g_get_prgname (), "%u", NULL);
 910       recent_data.groups = NULL;
 911       recent_data.is_private = FALSE;
 912
 913       gtk_recent_manager_add_full (gtk_recent_manager_get_default (),
 914                                    uri, &recent_data);
 915
 916       g_free (recent_data.app_exec);
 917       g_free (full_mime_type);
 918     }
 919
 920   g_free (uri);
 921 }
 922
 923
 924
 925 /*
 926    If FILE_NAME exists in the recent list, then  delete it.
 927  */
 928 static void
 929 delete_recent (const char *file_name)
 930 {
 931   gchar *uri = g_filename_to_uri  (file_name, NULL, NULL);
 932
 933   if ( uri )
 934     gtk_recent_manager_remove_item (gtk_recent_manager_get_default (), uri, NULL);
 935
 936   g_free (uri);
 937 }
 938