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, 2020 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->edited != NULL)
  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   if (window->edited)
 249     g_date_time_unref (window->edited);
 250
 251   g_signal_handler_disconnect (reg, window->remove_handler);
 252   g_signal_handler_disconnect (reg, window->insert_handler);
 253   psppire_window_register_remove (reg, window->list_name);
 254   g_free (window->filename);
 255   g_free (window->basename);
 256   g_free (window->id);
 257   g_free (window->description);
 258   g_free (window->list_name);
 259
 260   g_hash_table_destroy (window->menuitem_table);
 261
 262   if (G_OBJECT_CLASS (parent_class)->finalize)
 263     G_OBJECT_CLASS (parent_class)->finalize (object);
 264 }
 265
 266 static void
 267 psppire_window_class_init (PsppireWindowClass *class)
 268 {
 269   GObjectClass *object_class = G_OBJECT_CLASS (class);
 270
 271   GParamSpec *description_spec =
 272     null_if_empty_param ("description",
 273                        "Description",
 274                        "A string describing the usage of the window",
 275                          NULL, /*Should be overridden by derived classes */
 276                        G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE);
 277
 278   GParamSpec *filename_spec =
 279     null_if_empty_param ("filename",
 280                        "File name",
 281                        "The name of the file associated with this window, if any",
 282                          NULL,
 283                          G_PARAM_CONSTRUCT | G_PARAM_READWRITE);
 284
 285   GParamSpec *id_spec =
 286     null_if_empty_param ("id",
 287                          "Identifier",
 288                          "The PSPP language identifier for the data associated "
 289                          "with this window (e.g. dataset name)",
 290                          NULL,
 291                          G_PARAM_CONSTRUCT | G_PARAM_READWRITE);
 292
 293   object_class->set_property = psppire_window_set_property;
 294   object_class->get_property = psppire_window_get_property;
 295
 296   g_object_class_install_property (object_class,
 297                                    PROP_DESCRIPTION,
 298                                    description_spec);
 299
 300   g_object_class_install_property (object_class,
 301                                    PROP_FILENAME,
 302                                    filename_spec);
 303
 304   g_object_class_install_property (object_class,
 305                                    PROP_ID,
 306                                    id_spec);
 307
 308   parent_class = g_type_class_peek_parent (class);
 309 }
 310
 311
 312 static void
 313 psppire_window_base_init (PsppireWindowClass *class)
 314 {
 315   GObjectClass *object_class = G_OBJECT_CLASS (class);
 316
 317   object_class->finalize = psppire_window_finalize;
 318 }
 319
 320
 321
 322 static void
 323 insert_menuitem_into_menu (PsppireWindow *window, gpointer key)
 324 {
 325   gchar *filename;
 326   GtkWidget *item;
 327   filename = g_filename_display_name (key);
 328   item = gtk_check_menu_item_new_with_label (filename);
 329   g_free (filename);
 330
 331   g_hash_table_insert (window->menuitem_table, key, item);
 332 }
 333
 334 static void
 335 insert_item (gpointer key, gpointer value, gpointer data)
 336 {
 337   PsppireWindow *window = PSPPIRE_WINDOW (data);
 338
 339   if (NULL != g_hash_table_lookup (window->menuitem_table, key))
 340     return;
 341
 342   insert_menuitem_into_menu (window, key);
 343 }
 344
 345 /* Insert a new item into the window menu */
 346 static void
 347 insert_menuitem (GObject *reg, const gchar *key, gpointer data)
 348 {
 349   PsppireWindow *window = PSPPIRE_WINDOW (data);
 350
 351   insert_menuitem_into_menu (window, (gpointer) key);
 352 }
 353
 354
 355 static void
 356 remove_menuitem (PsppireWindowRegister *reg, const gchar *key, gpointer data)
 357 {
 358   PsppireWindow *window = PSPPIRE_WINDOW (data);
 359   g_hash_table_remove (window->menuitem_table, key);
 360 }
 361
 362 static void
 363 insert_existing_items (PsppireWindow *window)
 364 {
 365   psppire_window_register_foreach (psppire_window_register_new (), insert_item, window);
 366 }
 367
 368
 369 static gboolean
 370 on_delete (PsppireWindow *w, GdkEvent *event, gpointer user_data)
 371 {
 372   PsppireWindowRegister *reg = psppire_window_register_new ();
 373
 374   if (w->edited != NULL)
 375     {
 376       gint response = psppire_window_query_save (w);
 377
 378       switch (response)
 379         {
 380         default:
 381         case GTK_RESPONSE_CANCEL:
 382           return TRUE;
 383           break;
 384         case GTK_RESPONSE_APPLY:
 385           psppire_window_save (w);
 386           if (w->edited != NULL)
 387             {
 388               /* Save failed, or user exited Save As dialog with Cancel. */
 389               return TRUE;
 390             }
 391           break;
 392         case GTK_RESPONSE_REJECT:
 393           break;
 394         }
 395     }
 396
 397   if (1 == psppire_window_register_n_items (reg))
 398     gtk_main_quit ();
 399
 400   return FALSE;
 401 }
 402
 403
 404 static void
 405 psppire_window_init (PsppireWindow *window)
 406 {
 407   window->filename = NULL;
 408   window->basename = NULL;
 409   window->id = NULL;
 410   window->description = NULL;
 411   window->list_name = NULL;
 412   window->edited = NULL;
 413
 414   window->menuitem_table  = g_hash_table_new (g_str_hash, g_str_equal);
 415
 416
 417   g_signal_connect (window,  "realize", G_CALLBACK (insert_existing_items), NULL);
 418
 419   window->insert_handler = g_signal_connect (psppire_window_register_new (),
 420                                              "inserted",
 421                                              G_CALLBACK (insert_menuitem),
 422                                              window);
 423
 424   window->remove_handler = g_signal_connect (psppire_window_register_new (),
 425                                              "removed",
 426                                              G_CALLBACK (remove_menuitem),
 427                                              window);
 428
 429   window->added_separator = FALSE;
 430
 431   g_signal_connect_swapped (window, "delete-event", G_CALLBACK (on_delete), window);
 432
 433   g_object_set (window, "icon-name", "pspp", NULL);
 434 }
 435
 436 /*
 437    Ask the user if the buffer should be saved.
 438    Return the response.
 439 */
 440 gint
 441 psppire_window_query_save (PsppireWindow *se)
 442 {
 443   gint response;
 444   GtkWidget *dialog;
 445   GtkWidget *cancel_button;
 446
 447   gchar *description;
 448
 449   GDateTime *now = g_date_time_new_now_utc ();
 450   GTimeSpan timespan = g_date_time_difference (now, se->edited);
 451   g_date_time_unref (now);
 452
 453   if (se->filename)
 454     description = g_filename_display_basename (se->filename);
 455   else if (se->id)
 456     description = g_strdup (se->id);
 457   else
 458     description = g_strdup (se->description);
 459   dialog =
 460     gtk_message_dialog_new (GTK_WINDOW (se),
 461                             GTK_DIALOG_MODAL,
 462                             GTK_MESSAGE_WARNING,
 463                             GTK_BUTTONS_NONE,
 464                             _("Save the changes to `%s' before closing?"),
 465                             description);
 466   g_free (description);
 467
 468   g_object_set (dialog, "icon-name", "pspp", NULL);
 469
 470   gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog),
 471                                             _("If you don't save, changes from the last %ld seconds will be permanently lost."),
 472                                             timespan / G_TIME_SPAN_SECOND);
 473
 474   gtk_dialog_add_button  (GTK_DIALOG (dialog),
 475                           _("Close _without saving"),
 476                           GTK_RESPONSE_REJECT);
 477
 478   cancel_button = gtk_dialog_add_button  (GTK_DIALOG (dialog),
 479                                           _("Cancel"),
 480                                           GTK_RESPONSE_CANCEL);
 481
 482   gtk_dialog_add_button  (GTK_DIALOG (dialog),
 483                           _("Save"),
 484                           GTK_RESPONSE_APPLY);
 485
 486   gtk_widget_grab_focus (cancel_button);
 487
 488   response = gtk_dialog_run (GTK_DIALOG (dialog));
 489
 490   gtk_widget_destroy (dialog);
 491
 492   return response;
 493 }
 494
 495
 496 /* The return value is encoded in the glib filename encoding. */
 497 const gchar *
 498 psppire_window_get_filename (PsppireWindow *w)
 499 {
 500   return w->filename;
 501 }
 502
 503
 504 /* FILENAME must be encoded in the glib filename encoding. */
 505 void
 506 psppire_window_set_filename (PsppireWindow *w, const gchar *filename)
 507 {
 508   g_object_set (w, "filename", filename, NULL);
 509 }
 510
 511 void
 512 psppire_window_set_unsaved (PsppireWindow *w)
 513 {
 514   if (w->edited == NULL)
 515     w->edited = g_date_time_new_now_utc ();
 516
 517   psppire_window_set_title (w);
 518 }
 519
 520 gboolean
 521 psppire_window_get_unsaved (PsppireWindow *w)
 522 {
 523   return w->edited != NULL;
 524 }
 525
 526
 527 \f
 528
 529
 530 static void
 531 minimise_window (gpointer key, gpointer value, gpointer data)
 532 {
 533   gtk_window_iconify (GTK_WINDOW (value));
 534 }
 535
 536
 537 void
 538 psppire_window_minimise_all (void)
 539 {
 540   PsppireWindowRegister *reg = psppire_window_register_new ();
 541
 542   g_hash_table_foreach (reg->name_table, minimise_window, NULL);
 543 }
 544
 545
 546 \f
 547
 548 GType
 549 psppire_window_model_get_type (void)
 550 {
 551   static GType window_model_type = 0;
 552
 553   if (! window_model_type)
 554     {
 555       static const GTypeInfo window_model_info =
 556       {
 557         sizeof (PsppireWindowIface), /* class_size */
 558         NULL,           /* base_init */
 559         NULL,           /* base_finalize */
 560         NULL,
 561         NULL,           /* class_finalize */
 562         NULL,           /* class_data */
 563         0,
 564         0,              /* n_preallocs */
 565         NULL
 566       };
 567
 568       window_model_type =
 569         g_type_register_static (G_TYPE_INTERFACE, "PsppireWindowModel",
 570                                 &window_model_info, 0);
 571
 572       g_type_interface_add_prerequisite (window_model_type, G_TYPE_OBJECT);
 573     }
 574
 575   return window_model_type;
 576 }
 577
 578
 579 void
 580 psppire_window_save (PsppireWindow *w)
 581 {
 582   PsppireWindowIface *i = PSPPIRE_WINDOW_MODEL_GET_IFACE (w);
 583
 584   g_assert (i);
 585   g_return_if_fail (i->save);
 586
 587   if (w->filename == NULL)
 588     psppire_window_save_as (w);
 589   else
 590     {
 591       i->save (w);
 592       if (w->edited)
 593         g_date_time_unref (w->edited);
 594       w->edited = NULL;
 595
 596       psppire_window_set_title (w);
 597     }
 598 }
 599
 600 void
 601 psppire_window_save_as (PsppireWindow *w)
 602 {
 603   PsppireWindowIface *i = PSPPIRE_WINDOW_MODEL_GET_IFACE (w);
 604   gchar *old_filename;
 605
 606   g_assert (i);
 607   g_return_if_fail (i->pick_filename);
 608
 609   old_filename = w->filename;
 610   w->filename = NULL;
 611
 612   i->pick_filename (w);
 613   if (w->filename == NULL)
 614     w->filename = old_filename;
 615   else
 616     {
 617       g_free (old_filename);
 618       psppire_window_save (w);
 619     }
 620 }
 621
 622 static void delete_recent (const char *file_name);
 623
 624 gboolean
 625 psppire_window_load (PsppireWindow *w, const gchar *file,
 626                      const gchar *encoding, gpointer hint)
 627 {
 628   gboolean ok;
 629   PsppireWindowIface *i = PSPPIRE_WINDOW_MODEL_GET_IFACE (w);
 630
 631   g_assert (PSPPIRE_IS_WINDOW_MODEL (w));
 632
 633   g_assert (i);
 634
 635   g_return_val_if_fail (i->load, FALSE);
 636
 637   ok = i->load (w, file, encoding, hint);
 638
 639   if (ok)
 640     {
 641       psppire_window_set_filename (w, file);
 642       if (w->edited)
 643         g_date_time_unref (w->edited);
 644       w->edited = NULL;
 645     }
 646   else
 647     delete_recent (file);
 648
 649   return ok;
 650 }
 651
 652
 653 GtkWidget *
 654 psppire_window_file_chooser_dialog (PsppireWindow *toplevel)
 655 {
 656   GtkFileFilter *filter = gtk_file_filter_new ();
 657   GtkWidget *dialog =
 658     gtk_file_chooser_dialog_new (_("Open"),
 659                                  GTK_WINDOW (toplevel),
 660                                  GTK_FILE_CHOOSER_ACTION_OPEN,
 661                                  _("Cancel"), GTK_RESPONSE_CANCEL,
 662                                  _("Open"), GTK_RESPONSE_ACCEPT,
 663                                  NULL);
 664
 665   g_object_set (dialog, "local-only", FALSE, NULL);
 666
 667   gtk_file_filter_set_name (filter, _("Data and Syntax Files"));
 668   gtk_file_filter_add_mime_type (filter, "application/x-spss-sav");
 669   gtk_file_filter_add_mime_type (filter, "application/x-spss-por");
 670   gtk_file_filter_add_mime_type (filter, "application/x-spss-spv");
 671   gtk_file_filter_add_pattern (filter, "*.zsav");
 672   gtk_file_filter_add_pattern (filter, "*.sps");
 673   gtk_file_filter_add_pattern (filter, "*.SPS");
 674   gtk_file_filter_add_pattern (filter, "*.spv");
 675   gtk_file_filter_add_pattern (filter, "*.SPV");
 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, _("System Files (*.sav, *.zsav)"));
 680   gtk_file_filter_add_mime_type (filter, "application/x-spss-sav");
 681   gtk_file_filter_add_pattern (filter, "*.zsav");
 682   gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (dialog), filter);
 683
 684   filter = gtk_file_filter_new ();
 685   gtk_file_filter_set_name (filter, _("Portable Files (*.por) "));
 686   gtk_file_filter_add_mime_type (filter, "application/x-spss-por");
 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, _("Syntax Files (*.sps) "));
 691   gtk_file_filter_add_pattern (filter, "*.sps");
 692   gtk_file_filter_add_pattern (filter, "*.SPS");
 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, _("Output Files (*.spv) "));
 697   gtk_file_filter_add_pattern (filter, "*.spv");
 698   gtk_file_filter_add_pattern (filter, "*.SPV");
 699   gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (dialog), filter);
 700
 701   filter = gtk_file_filter_new ();
 702   gtk_file_filter_set_name (filter, _("All Files"));
 703   gtk_file_filter_add_pattern (filter, "*");
 704   gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (dialog), filter);
 705
 706   if (toplevel->filename)
 707     {
 708       const gchar *filename = toplevel->filename;
 709       gchar *dir_name;
 710
 711       if (! g_path_is_absolute (filename))
 712         {
 713           gchar *path =
 714             g_build_filename (g_get_current_dir (), filename, NULL);
 715           dir_name = g_path_get_dirname (path);
 716           g_free (path);
 717         }
 718       else
 719         {
 720           dir_name = g_path_get_dirname (filename);
 721         }
 722       gtk_file_chooser_set_current_folder (GTK_FILE_CHOOSER (dialog),
 723                                            dir_name);
 724       free (dir_name);
 725     }
 726
 727     gtk_file_chooser_set_extra_widget (
 728       GTK_FILE_CHOOSER (dialog),
 729       psppire_encoding_selector_new ("Auto", true));
 730
 731   return dialog;
 732 }
 733
 734 struct item_path
 735   {
 736     const struct spv_item **nodes;
 737     size_t n;
 738
 739 #define N_STUB 10
 740     const struct spv_item *stub[N_STUB];
 741   };
 742
 743 static void
 744 swap_nodes (const struct spv_item **a, const struct spv_item **b)
 745 {
 746   const struct spv_item *tmp = *a;
 747   *a = *b;
 748   *b = tmp;
 749 }
 750
 751 static void
 752 get_path (const struct spv_item *item, struct item_path *path)
 753 {
 754   size_t allocated = 10;
 755   path->nodes = path->stub;
 756   path->n = 0;
 757
 758   while (item)
 759     {
 760       if (path->n >= allocated)
 761         {
 762           if (path->nodes == path->stub)
 763             path->nodes = xmemdup (path->stub, sizeof path->stub);
 764           path->nodes = x2nrealloc (path->nodes, &allocated,
 765                                     sizeof *path->nodes);
 766         }
 767       path->nodes[path->n++] = item;
 768       item = item->parent;
 769     }
 770
 771   for (size_t i = 0; i < path->n / 2; i++)
 772     swap_nodes (&path->nodes[i], &path->nodes[path->n - i - 1]);
 773 }
 774
 775 static void
 776 free_path (struct item_path *path)
 777 {
 778   if (path && path->nodes != path->stub)
 779     free (path->nodes);
 780 }
 781
 782 static void
 783 dump_heading_transition (const struct spv_item *old,
 784                          const struct spv_item *new)
 785 {
 786   if (old == new)
 787     return;
 788
 789   struct item_path old_path, new_path;
 790   get_path (old, &old_path);
 791   get_path (new, &new_path);
 792
 793   size_t common = 0;
 794   for (; common < old_path.n && common < new_path.n; common++)
 795     if (old_path.nodes[common] != new_path.nodes[common])
 796       break;
 797
 798   for (size_t i = common; i < old_path.n; i++)
 799     group_close_item_submit (group_close_item_create ());
 800   for (size_t i = common; i < new_path.n; i++)
 801     group_open_item_submit (group_open_item_create (
 802                               new_path.nodes[i]->command_id));
 803
 804   free_path (&old_path);
 805   free_path (&new_path);
 806 }
 807
 808 void
 809 read_spv_file (const char *filename)
 810 {
 811   struct spv_reader *spv;
 812   char *error = spv_open (filename, &spv);
 813   if (error)
 814     {
 815       /* XXX */
 816       fprintf (stderr, "%s\n", error);
 817       return;
 818     }
 819
 820   struct spv_item **items;
 821   size_t n_items;
 822   spv_select (spv, NULL, 0, &items, &n_items);
 823   struct spv_item *prev_heading = spv_get_root (spv);
 824   for (size_t i = 0; i < n_items; i++)
 825     {
 826       struct spv_item *heading
 827         = items[i]->type == SPV_ITEM_HEADING ? items[i] : items[i]->parent;
 828       dump_heading_transition (prev_heading, heading);
 829       if (items[i]->type == SPV_ITEM_TEXT)
 830         spv_text_submit (items[i]);
 831       else if (items[i]->type == SPV_ITEM_TABLE)
 832         pivot_table_submit (spv_item_get_table (items[i]));
 833       prev_heading = heading;
 834     }
 835   dump_heading_transition (prev_heading, spv_get_root (spv));
 836   free (items);
 837   spv_close (spv);
 838 }
 839
 840 /* Callback for the file_open action.
 841    Prompts for a filename and opens it */
 842 void
 843 psppire_window_open (PsppireWindow *de)
 844 {
 845   GtkWidget *dialog = psppire_window_file_chooser_dialog (de);
 846
 847   gtk_file_chooser_add_shortcut_folder (GTK_FILE_CHOOSER (dialog), relocate (examples_dir), NULL);
 848
 849   switch (gtk_dialog_run (GTK_DIALOG (dialog)))
 850     {
 851     case GTK_RESPONSE_ACCEPT:
 852       {
 853         gchar *name =
 854           gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
 855
 856         const gchar **cs = NULL;
 857         g_get_filename_charsets (&cs);
 858
 859         gchar *encoding = psppire_encoding_selector_get_encoding (
 860           gtk_file_chooser_get_extra_widget (GTK_FILE_CHOOSER (dialog)));
 861
 862         struct file_handle *fh = fh_create_file (NULL, name, cs[0], fh_default_properties ());
 863
 864         int retval = any_reader_detect (fh, NULL);
 865         if (retval == 1)
 866           open_data_window (de, name, encoding, NULL);
 867         else if (retval == 0)
 868           {
 869             char *error = spv_detect (name);
 870             if (!error)
 871               read_spv_file (name);
 872             else
 873               {
 874                 free (error);
 875                 open_syntax_window (name, encoding);
 876               }
 877           }
 878
 879         g_free (encoding);
 880         fh_unref (fh);
 881         g_free (name);
 882       }
 883       break;
 884     default:
 885       break;
 886     }
 887
 888   gtk_widget_destroy (dialog);
 889 }
 890
 891
 892 /* Puts FILE_NAME (encoded in the glib file name encoding) into the recent list
 893    with associated MIME_TYPE.  If it's already in the list, it moves it to the
 894    top. */
 895 void
 896 add_most_recent (const char *file_name,
 897                  const char *mime_type, const char *encoding)
 898 {
 899   gchar *uri = g_filename_to_uri  (file_name, NULL, NULL);
 900   if (uri)
 901     {
 902       GtkRecentData recent_data;
 903       gchar *full_mime_type;
 904
 905       if (encoding && encoding[0])
 906         full_mime_type = g_strdup_printf ("%s; charset=%s",
 907                                           mime_type, encoding);
 908       else
 909         full_mime_type = g_strdup (mime_type);
 910
 911       recent_data.display_name = NULL;
 912       recent_data.description = NULL;
 913       recent_data.mime_type = full_mime_type;
 914       recent_data.app_name = CONST_CAST (gchar *, g_get_application_name ());
 915       recent_data.app_exec = g_strjoin (" ", g_get_prgname (), "%u", NULL);
 916       recent_data.groups = NULL;
 917       recent_data.is_private = FALSE;
 918
 919       gtk_recent_manager_add_full (gtk_recent_manager_get_default (),
 920                                    uri, &recent_data);
 921
 922       g_free (recent_data.app_exec);
 923       g_free (full_mime_type);
 924     }
 925
 926   g_free (uri);
 927 }
 928
 929
 930
 931 /*
 932    If FILE_NAME exists in the recent list, then  delete it.
 933  */
 934 static void
 935 delete_recent (const char *file_name)
 936 {
 937   gchar *uri = g_filename_to_uri  (file_name, NULL, NULL);
 938
 939   if (uri)
 940     gtk_recent_manager_remove_item (gtk_recent_manager_get_default (), uri, NULL);
 941
 942   g_free (uri);
 943 }
 944