READLINE PATCH REPORT
			   =====================

Readline-Release: 5.2
Patch-ID: readline52-013

Bug-Reported-by:	slinkp <stuff@slinkp.com>
Bug-Reference-ID:	<da52a26a-9f38-4861-a918-14d3482b539d@c65g2000hsa.googlegroups.com>
Bug-Reference-URL:	http://lists.gnu.org/archive/html/bug-bash/2008-05/msg00085.html

Bug-Description:

The presence of invisible characters in a prompt longer than the screenwidth
with invisible characters on the first and last prompt lines caused readline
to place the cursor in the wrong physical location.

Patch:

*** ../readline-5.2-patched/display.c	2007-12-14 21:12:40.000000000 -0500
--- display.c	2008-10-23 09:39:46.000000000 -0400
***************
*** 911,914 ****
--- 944,951 ----
  	     OFFSET (which has already been calculated above).  */
  
+ #define INVIS_FIRST()	(prompt_physical_chars > _rl_screenwidth ? prompt_invis_chars_first_line : wrap_offset)
+ #define WRAP_OFFSET(line, offset)  ((line == 0) \
+ 					? (offset ? INVIS_FIRST() : 0) \
+ 					: ((line == prompt_last_screen_line) ? wrap_offset-prompt_invis_chars_first_line : 0))
  #define W_OFFSET(line, offset) ((line) == 0 ? offset : 0)
  #define VIS_LLEN(l)	((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l]))
***************
*** 945,949 ****
  		  _rl_last_c_pos > wrap_offset &&
  		  o_cpos < prompt_last_invisible)
! 		_rl_last_c_pos -= wrap_offset;
  		  
  	      /* If this is the line with the prompt, we might need to
--- 982,992 ----
  		  _rl_last_c_pos > wrap_offset &&
  		  o_cpos < prompt_last_invisible)
! 		_rl_last_c_pos -= prompt_invis_chars_first_line;	/* XXX - was wrap_offset */
! 	      else if (linenum == prompt_last_screen_line && prompt_physical_chars > _rl_screenwidth &&
! 			(MB_CUR_MAX > 1 && rl_byte_oriented == 0) &&
! 			cpos_adjusted == 0 &&
! 			_rl_last_c_pos != o_cpos &&
! 			_rl_last_c_pos > (prompt_last_invisible - _rl_screenwidth - prompt_invis_chars_first_line))
! 		_rl_last_c_pos -= (wrap_offset-prompt_invis_chars_first_line);
  		  
  	      /* If this is the line with the prompt, we might need to
***************
*** 1205,1209 ****
  {
    register char *ofd, *ols, *oe, *nfd, *nls, *ne;
!   int temp, lendiff, wsatend, od, nd, o_cpos;
    int current_invis_chars;
    int col_lendiff, col_temp;
--- 1264,1268 ----
  {
    register char *ofd, *ols, *oe, *nfd, *nls, *ne;
!   int temp, lendiff, wsatend, od, nd, twidth, o_cpos;
    int current_invis_chars;
    int col_lendiff, col_temp;
***************
*** 1221,1225 ****
      temp = _rl_last_c_pos;
    else
!     temp = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset);
    if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode
  	&& _rl_last_v_pos == current_line - 1)
--- 1280,1284 ----
      temp = _rl_last_c_pos;
    else
!     temp = _rl_last_c_pos - WRAP_OFFSET (_rl_last_v_pos, visible_wrap_offset);
    if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode
  	&& _rl_last_v_pos == current_line - 1)
***************
*** 1587,1599 ****
  	    {
  	      _rl_output_some_chars (nfd + lendiff, temp - lendiff);
- #if 1
  	     /* XXX -- this bears closer inspection.  Fixes a redisplay bug
  		reported against bash-3.0-alpha by Andreas Schwab involving
  		multibyte characters and prompt strings with invisible
  		characters, but was previously disabled. */
! 	      _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-col_lendiff);
! #else
! 	      _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-lendiff);
! #endif
  	    }
  	}
--- 1648,1660 ----
  	    {
  	      _rl_output_some_chars (nfd + lendiff, temp - lendiff);
  	     /* XXX -- this bears closer inspection.  Fixes a redisplay bug
  		reported against bash-3.0-alpha by Andreas Schwab involving
  		multibyte characters and prompt strings with invisible
  		characters, but was previously disabled. */
! 	      if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
! 		twidth = _rl_col_width (nfd+lendiff, 0, temp-col_lendiff);
! 	      else
! 		twidth = temp - lendiff;
! 	      _rl_last_c_pos += twidth;
  	    }
  	}
***************
*** 1789,1793 ****
    int cpos, dpos;		/* current and desired cursor positions */
  
!   woff = W_OFFSET (_rl_last_v_pos, wrap_offset);
    cpos = _rl_last_c_pos;
  #if defined (HANDLE_MULTIBYTE)
--- 1850,1854 ----
    int cpos, dpos;		/* current and desired cursor positions */
  
!   woff = WRAP_OFFSET (_rl_last_v_pos, wrap_offset);
    cpos = _rl_last_c_pos;
  #if defined (HANDLE_MULTIBYTE)
***************
*** 1803,1807 ****
  	 prompt string, since they're both buffer indices and DPOS is a
  	 desired display position. */
!       if (new > prompt_last_invisible)		/* XXX - don't use woff here */
  	{
  	  dpos -= woff;
--- 1864,1872 ----
  	 prompt string, since they're both buffer indices and DPOS is a
  	 desired display position. */
!       if ((new > prompt_last_invisible) ||		/* XXX - don't use woff here */
! 	  (prompt_physical_chars > _rl_screenwidth &&
! 	   _rl_last_v_pos == prompt_last_screen_line &&
! 	   wrap_offset != woff &&
! 	   new > (prompt_last_invisible-_rl_screenwidth-wrap_offset)))
  	{
  	  dpos -= woff;