[Nano-devel] a newline getting pushed offscreen

[Benno Schulenberg]

Op 27-06-17 om 18:17 schreef David Ramsey:
> Argh.  The problem isn't limited to a 50-column screen, either.  On an
> 80x24 screen, it also shows up when pressing End after running:
>
>     nano --ignore --soft +109,79 doc/faq.html
>
> I know what's causing this, though.  The newline character is at the
> edge of the screen in cases like these, so it gets pushed off beyond the
> edge because the break occurs one column too late.  I first saw this
> problem when softwrapping with atblanks set; it's why that mode breaks
> lines one column before the edge of the screen instead of at the edge of
> the screen.  The apparent fix is to make *all* softwrapping, regardless
> of atblanks, break lines one column before the edge of the screen.

No, I don't like that solution: it wastes a column.  If you do want to
break early, then you'll have to use a continuation character a la Emacs,
because otherwise the user will wonder why that last column is always empty.

> However, there is another problem that I haven't figured out,

One thing at a time.  I am first wondering what to do about the first
problem.  It seems to me that the counting how many columns a line is,
counts one column too few: the column where the cursor is when it is
at the very end of the line, on the virtual newline -- that is: on the
terminating \0 byte.  That byte also needs a column.

Benno