Re: Display problems with 'before-string in overlay

[Lennart Borgman (gmail)]

Kim F. Storm wrote:
> "Lennart Borgman (gmail)" <address@hidden> writes:
>
> > Just another note if someone else is trying this. Having coming back
> > to this several times today I am starting to believe that the way to
> > fix this is to change cursor_row_p. This was the original way that Kim
> > tried to solve it. Maybe Kim's solution with an added test of if the
> > "string" has the 'display property will solve the problem for now.
> >
> > I am unable to test this now, since I do not understand how to check
> > for the 'display property in cursor_row_p. If someone can tell that I
> > will test.
>
> That is _not_ easy.  
>
> You have to record that during redisplay (by display_line in the glyph
> row) if you need that information later.

But does not the code in set_cursor_from_row test for 'display in 
"strings"? Or is that another situation?

But I see now set_cursor_from_row just calls

          pos = XINT (Fnext_single_char_property_change
                      (make_number (pos), Qdisplay, Qnil, limit));

Can't that approach be used? glyph_row has a "pointer" to the position 
in the buffer through the field

    display_pos start,

where display_pos has a text_pos field. And text_pos has a charpos 
field, which I assume is the position in the buffer.


I am thinking about this solution since it seems rather safe to me.