bug#16856: 24.3.50; Cursor leaves garbage in fringe (and a request: width of fringes + scroll bar should be full characters)

[Anders Lindgren]

Hi!

I can repeat this using a slightly different recipe:

    emacs -Q

    (setq truncate-partial-width-windows nil)

    C-x 3

    C-x o

    C-u 37 x

       Here, the cursor which is in text area blinks, while the part in the fringe doesn't.

       Wait until the the cursor stop blinking

    C-a

        Now, the right fringe contains half a cursor.

    -- Anders

On Tue, May 17, 2016 at 8:30 PM, Alan Third <alan@idiocy.org> wrote:

martin rudalics <rudalics@gmx.at> writes:

>> Another argument of not having a "odd" width is that when splitting windows
>> side-by-side, you will end up with an unused gap to the right of almost a
>> full character. Steps to repeat:
>>
>>     emacs -Q
>>     (setq truncate-partial-width-windows nil) C-j
>>     C-x 3
>>
>>         Here, the right window have an unused space between the rightmost
>> character and the fringe, the space is almost a character wide. It's not
>> possible to resize the frame manually to correct this, as the frame can
>> only be resized full characters (as it should be). (When
>> `truncate-partial-width-windows' is t, the gap is used to display a partial
>> character.)
>>
>> To conclude, I would be much happier if the sum of the fringes and the
>> scroll bar would be an even five characters rather than five characters and
>> one pixel, as it is today.
>>
>> The question is if this is due to some display bug (maybe OS X specific) or
>> if this is the way it is supposed to work now?
>
> This used to happen with Emacs 24.3 here and should be gone now.  But OS
> X still has the old extended fringes code in place - maybe that
> interferes.  Could you try to remove it - I can't compile for OS X so I
> won't do that.  If you want to know how, have a look at these changes:

I believe this behaviour is no longer present in Emacs 25.

I don't think there's anything else in this bug report that needs
addressed, and as such, I'll close it in a couple of weeks if nobody
objects.
--
Alan Third