+ // delve up/down the dir tree
+ if ( strcmp ( ui_selected -> ref -> title_en, ".." ) == 0 ) {
+ // go up
+ char *c;
+
+ // lop off last word; if the thing ends with /, lop that one, then the next word.
+ while ( ( c = strrchr ( g_categories [ ui_category] -> fspath, '/' ) ) ) {
+ *c = '\0'; // lop off the last hunk
+ if ( *(c+1) != '\0' ) {
+ break;
+ }
+ } // while
+
+ // nothing left?
+ if ( g_categories [ ui_category] -> fspath [ 0 ] == '\0' ) {
+ free ( g_categories [ ui_category] -> fspath );
+ g_categories [ ui_category] -> fspath = strdup ( "/" );
+ }
+
+ } else {
+ // go down
+ char *temp = malloc ( strlen ( g_categories [ ui_category] -> fspath ) + strlen ( ui_selected -> ref -> title_en ) + 1 + 1 );
+ sprintf ( temp, "%s/%s", g_categories [ ui_category] -> fspath, ui_selected -> ref -> title_en );
+ free ( g_categories [ ui_category] -> fspath );
+ g_categories [ ui_category] -> fspath = temp;
+ }
+
+ pnd_log ( pndn_debug, "Cat %s is now in path %s\n", g_categories [ ui_category ] -> catname, g_categories [ ui_category ]-> fspath );
+
+ // forget the selection, nolonger applies
+ ui_selected = NULL;
+ ui_set_selected ( ui_selected );
+ // rescan the dir
+ category_fs_restock ( g_categories [ ui_category ] );
+ // redraw the grid
+ render_mask |= CHANGED_SELECTION;