+
+ {
+ const gchar *s = text;
+ while (*s)
+ {
+ if ( !isspace (*s))
+ break;
+ s++;
+ }
+
+ if ( !*s) return FALSE;
+ }
+ }
+
+ msg_disable ();
+ ok = data_in (ss_cstr (text), LEGACY_NATIVE, format.type, 0, 0, 0,
+ v, fmt_var_width (&format));
+ msg_enable ();
+
+ return ok;
+}
+
+
+GtkWidget *
+get_widget_assert (GladeXML *xml, const gchar *name)
+{
+ GtkWidget *w;
+ g_assert (xml);
+ g_assert (name);
+
+ w = glade_xml_get_widget (xml, name);
+
+ if ( !w )
+ g_critical ("Widget \"%s\" could not be found\n", name);
+
+ return w;
+}
+
+/* Converts a string in the pspp locale to utf-8.
+ The return value must be freed when no longer required*/
+gchar *
+pspp_locale_to_utf8 (const gchar *text, gssize len, GError **err)
+{
+ return recode_string (CONV_PSPP_TO_UTF8, text, len);
+}
+
+#define _(msgid) gettext (msgid)
+#define N_(msgid) msgid
+
+
+static void
+give_help (void)
+{
+ GtkWidget *dialog;
+
+ dialog = gtk_message_dialog_new (NULL,
+ GTK_DIALOG_MODAL,
+ GTK_MESSAGE_INFO,
+ GTK_BUTTONS_CLOSE,
+ _("Sorry. The help system hasn't yet "
+ "been implemented."));
+ gtk_dialog_run (GTK_DIALOG (dialog));
+ gtk_widget_destroy (dialog);
+}
+
+void
+connect_help (GladeXML *xml)
+{
+ GList *helps = glade_xml_get_widget_prefix (xml, "help_button_");
+
+ GList *i;
+ for ( i = g_list_first (helps); i ; i = g_list_next (i))
+ g_signal_connect (GTK_WIDGET (i->data), "clicked", give_help, 0);
+
+ g_list_free (helps);
+}
+
+
+
+void
+reference_manual (GtkMenuItem *menu, gpointer data)
+{
+ GError *err = NULL;
+ if ( ! g_spawn_command_line_async ("yelp info:pspp", &err) )
+ {
+ msg (ME, _("Cannot open reference manual: %s"), err->message);
+ }
+ g_clear_error (&err);
+}
+
+
+extern struct dataset *the_dataset;
+extern struct source_stream *the_source_stream;
+extern PsppireDataStore *the_data_store;
+
+/* Lazy casereader callback function used by execute_syntax. */
+static struct casereader *
+create_casereader_from_data_store (void *data_store_)
+{
+ PsppireDataStore *data_store = data_store_;
+ return psppire_data_store_get_reader (data_store);
+}
+
+gboolean
+execute_syntax (struct getl_interface *sss)
+{
+ struct lexer *lexer;
+ gboolean retval = TRUE;
+
+ struct casereader *reader;
+ size_t value_cnt;
+ casenumber case_cnt;
+ unsigned long int lazy_serial;
+
+ /* When the user executes a number of snippets of syntax in a
+ row, none of which read from the active file, the GUI becomes
+ progressively less responsive. The reason is that each syntax
+ execution encapsulates the active file data in another
+ datasheet layer. The cumulative effect of having a number of
+ layers of datasheets wastes time and space.
+
+ To solve the problem, we use a "lazy casereader", a wrapper
+ around the casereader obtained from the data store, that
+ only actually instantiates that casereader when it is
+ needed. If the data store casereader is never needed, then
+ it is reused the next time syntax is run, without wrapping
+ it in another layer. */
+ value_cnt = psppire_data_store_get_value_count (the_data_store);
+ case_cnt = psppire_data_store_get_case_count (the_data_store);
+ reader = lazy_casereader_create (value_cnt, case_cnt,
+ create_casereader_from_data_store,
+ the_data_store, &lazy_serial);
+ proc_set_active_file_data (the_dataset, reader);
+
+ g_return_val_if_fail (proc_has_active_file (the_dataset), FALSE);
+
+ lexer = lex_create (the_source_stream);
+
+ getl_append_source (the_source_stream, sss, GETL_BATCH, ERRMODE_CONTINUE);
+
+ for (;;)
+ {
+ enum cmd_result result = cmd_parse (lexer, the_dataset);
+
+ if ( cmd_result_is_failure (result))