arg_show_lines (...)

// command arg_show_lines(...)

// In a selective display, show a range of lines by line number
// The main goal here is to open a range of hidden lines to view.
// If the range contains already-displayed lines, they'll be
// displayed  along with the newly displayed hidden lines
//
// Usage: arg_show_lines 352 396
//
// Note: if a line with a "minus bitmap" is displayed before
// executing this macro, the minus bitmap will be removed; this
// makes some sense because the macro is meant to remove all
// minus and plusbitmap lines as it unhides all lines in the
// selected range
//
_command void arg_show_lines(...) name_info(','VSARG2_MARK|VSARG2_REQUIRES_EDITORCTL)
{
parse arg(1) with first_line last_line       // get line numbers from the
p_line=first_line;                           // command-line arguments
up();
if (p_line<=1) {                             // check the lineflags in the      p_line=0;                                 // range, get seldisp level      new_level=0;   } else {      new_level=_lineflags()&LEVEL_LF;      if (!up()) {         new_level=_lineflags()&LEVEL_LF;         down();      }   }   for (;;) {                                    // go through all lines in the      if (p_line>last_line) break;               // specified range and bust
   level=(_lineflags() & LEVEL_LF);           // them out of hidden state
   _lineflags(new_level,HIDDEN_LF|LEVEL_LF|PLUSBITMAP_LF|MINUSBITMAP_LF);
   status=down();
   if (status) {
      break;
   }
   if (p_line>last_line) {
      break;
   }
}
p_line=last_line;
}