bug#67925: 29.1; delete-rectangle fails on multi-column characters

[awrhygty@outlook.com]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Stefan Kangas <stefankangas@gmail.com>
>> Date: Sun, 24 Dec 2023 06:52:13 -0800
>> Cc: monnier@iro.umontreal.ca, awrhygty@outlook.com, 67925@debbugs.gnu.org
>> 
>> Juri Linkov <juri@linkov.net> writes:
>> 
>> >>> OTOH, with monospaced fonts LibreOffice selects such Block Area
>> >>> on the reported text:
>> >>>
>> >>> and DEL deletes the selected text.  So maybe Emacs should do the same.
>> >>
>> >> The patch I posted in
>> >>
>> >>   https://debbugs.gnu.org/cgi/bugreport.cgi?bug=67925#8
>> >>
>> >> is supposed to do precisely that (and does it at least in this simple
>> >> example).
>> >
>> > I confirm this, so probably it's impossible to do anything better
>> > than that.
>> 
>> Doing as well as LibreOffice is probably already not bad.
>> 
>> Perhaps we should add a comment pointing to this discussion, to explain
>> why we have chosen this particular heuristic.
>
> Thanks.  Since it sounds like everyone agreed with the solution I
> proposed, I have now installed that on the master branch, and I'm
> therefore closing this bug.

The preview of 'C-x r t'(string-rectangle) seems different from the
result.

Before:
12345
一二5
12345

Preview:
1x2345
 x 二5
1x2345

Result:
1x2345
一x二5
1x2345