Re: Buggy display of non-breaking space character in several single-byte encodings

Bram Moolenaar wrote:
> Brett Stahlman wrote:
>
>> I've noticed that Vim displays the "NO-BREAK SPACE" character (Unicode
>> 00A0) incorrectly for several single-byte encodings (e.g., cp437, cp850
>> and cp775), which typically encode it as 0xFF.
>>
>> To reproduce...
>> :set enc=cp850
>> Enter the following 2 lines in an empty buffer...
>> <ff>2345
>> 12345
>> ...where <ff> represents the character at code point 0xff, entered with
>> CTRL-V.
>>
>> The non-breaking space is displayed normally (like a regular space
>> character) until the cursor is moved onto it, whereupon the cursor
>> becomes 4 characters wide, covering (and effectively erasing) all but
>> the "5" on the first row. The covered characters are not redrawn when
>> the cursor is moved down a row with j. If you then use CTRL-L to redraw,
>> the covered characters are redrawn, but shifted rightward from their
>> original location. Move the cursor back up to the line with the
>> non-breaking space, then move it left and right, and you'll see the
>> characters redrawn in the 2 different spots, sometimes simultaneously.
>
> Vim probably doesn't know that 0xff is a space or any special character.
> After setting the 'encoding', you also need to set 'isprint'.
>
> If you set 'isprint' properly, does the problem go away?
>

No. 'isprint' was already set to the Linux default, which includes 255:
i.e.,
@,161-255

Thanks, Brett Stahlman

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