bug#64696: 30.0.50; indent-to inherits preceding text properties, including 'invisible

[Ihor Radchenko <yantar92@posteo.net>]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Ihor Radchenko <yantar92@posteo.net>
>> Cc: monnier@iro.umontreal.ca, 64696@debbugs.gnu.org
>> Date: Thu, 20 Jul 2023 09:10:02 +0000
>> 
>> You can do M-x yant/full-test after evaluating the code below
>
> And what are the problems you see with current-column in this example?
> (Let's leave indent-to alone for now.)

⛔ Warning (emacs): Test #1:: Everything visible.
⛔ Warning (emacs): Moved point after first ’word’
⛔ Warning (emacs): 1:: current-column = 4

Test #1 is expected - everything is visible, we are indeed at column 4.

⛔ Warning (emacs): Test #2:: ’word’ is inside folded heading (hidden using overlays).
⛔ Warning (emacs): Moved point after first ’word’
⛔ Warning (emacs): 1:: current-column = 4

Test #2 is unexpected - we are inside invisible region, but
current-column reports as if everything were visible.

⛔ Warning (emacs): Test #3:: ’word’ is hidden applying ’invisible text property to heading body.
⛔ Warning (emacs): Moved point after first ’word’
⛔ Warning (emacs): 1:: current-column = 0

Test #3 follows your previous explanation that current-column ignores
invisible text.

-- 
Ihor Radchenko // yantar92,
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