===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/tmux/screen-write.c,v
retrieving revision 1.28
retrieving revision 1.29
diff -c -r1.28 -r1.29
*** src/usr.bin/tmux/screen-write.c	2009/10/12 16:33:39	1.28
--- src/usr.bin/tmux/screen-write.c	2009/10/12 16:59:55	1.29
***************
*** 1,4 ****
! /* $OpenBSD: screen-write.c,v 1.28 2009/10/12 16:33:39 nicm Exp $ */
  
  /*
   * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
--- 1,4 ----
! /* $OpenBSD: screen-write.c,v 1.29 2009/10/12 16:59:55 nicm Exp $ */
  
  /*
   * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
***************
*** 513,518 ****
--- 513,537 ----
  	s->cx -= nx;
  }
  
+ /* Backspace; cursor left unless at start of wrapped line when can move up. */
+ void
+ screen_write_backspace(struct screen_write_ctx *ctx)
+ {
+ 	struct screen		*s = ctx->s;
+ 	struct grid_line	*gl;
+ 
+ 	if (s->cx == 0) {
+ 		if (s->cy == 0)
+ 			return;
+ 		gl = &s->grid->linedata[s->grid->hsize + s->cy - 1];
+ 		if (gl->flags & GRID_LINE_WRAPPED) {
+ 			s->cy--;
+ 			s->cx = screen_size_x(s) - 1;
+ 		}
+ 	} else
+ 		s->cx--;
+ }
+ 
  /* VT100 alignment test. */
  void
  screen_write_alignmenttest(struct screen_write_ctx *ctx)
***************
*** 536,541 ****
--- 555,561 ----
  	s->cy = 0;
  
  	s->rupper = 0;
+ 
  	s->rlower = screen_size_y(s) - 1;
  
  	tty_write(tty_cmd_alignmenttest, &ttyctx);