Re: display bug for empty lines in recent git snapshot

[Giorgos Keramidas <keramida@ceid.upatras.gr>]

Excellent!  This fixes the bug here.

Thank you :)

On Wed, 17 Nov 2010 21:20:22 +0200, Eli Zaretskii <eliz@gnu.org> wrote:
>> That's ok.  I daily build new snapshots, and this is a very minor detail
>> that doesn't have any serious consequences to the actual *data* of the
>> buffer.  When you have a fix in the works, please feel free to forward
>> me the patch for testing.
>
> I think I fixed this now, patch below.
>
> === modified file 'src/ChangeLog'
> --- src/ChangeLog	2010-11-17 15:12:02 +0000
> +++ src/ChangeLog	2010-11-17 19:15:24 +0000
> @@ -1,3 +1,8 @@
> +2010-11-17  Eli Zaretskii  <eliz@gnu.org>
> +
> +	* xdisp.c (set_cursor_from_row): Fix cursor positioning in empty
> +	lines on text-mode terminals.  (bug#7417)
> +
>  2010-11-17  Stefan Monnier  <monnier@iro.umontreal.ca>
>
>  	* xterm.c (get_current_wm_state): Rename from get_current_vm_state.
>
> === modified file 'src/xdisp.c'
> --- src/xdisp.c	2010-11-17 02:37:45 +0000
> +++ src/xdisp.c	2010-11-17 19:15:24 +0000
> @@ -12839,6 +12839,15 @@ set_cursor_from_row (struct window *w, s
>  	&& BUFFERP (glyph->object) && glyph->charpos == pt_old)
>        && bpos_covered < pt_old)
>      {
> +      /* An empty line has a single glyph whose OBJECT is zero and
> +	 whose CHARPOS is the position of a newline on that line.
> +	 Note that on a TTY, there are more glyphs after that, which
> +	 were produced by extend_face_to_end_of_line, but their
> +	 CHARPOS is zero or negative.  */
> +      int empty_line_p =
> +	(row->reversed_p ? glyph > glyphs_end : glyph < glyphs_end)
> +	&& INTEGERP (glyph->object) && glyph->charpos > 0;
> +
>        if (row->ends_in_ellipsis_p && pos_after == last_pos)
>  	{
>  	  EMACS_INT ellipsis_pos;
> @@ -12875,6 +12884,7 @@ set_cursor_from_row (struct window *w, s
>  	       || (row->truncated_on_right_p && pt_old > bpos_max)
>  	       /* Zero-width characters produce no glyphs.  */
>  	       || (!string_seen
> +		   && !empty_line_p
>  		   && (row->reversed_p
>  		       ? glyph_after > glyphs_end
>  		       : glyph_after < glyphs_end)))