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bug#61580: line-prefix and display text properties cause odd cursor move
From: |
Eli Zaretskii |
Subject: |
bug#61580: line-prefix and display text properties cause odd cursor movement |
Date: |
Sat, 18 Feb 2023 13:42:31 +0200 |
> From: Darius Foo <darius.foo.tw@gmail.com>
> Date: Sat, 18 Feb 2023 00:39:00 +0800
>
> When moving the cursor up and down on lines which have both line-prefix and
> display text properties, the
> cursor column isn't preserved, jumping ahead or back by a fixed amount.
>
> This can be reproduced with the following config
>
> (add-text-properties 12 13 '(line-prefix " "))
> (add-text-properties 27 28 '(line-prefix " "))
> (add-text-properties 57 58 '(line-prefix " "))
> (add-text-properties 72 73 '(line-prefix " "))
>
> (add-text-properties 12 13 '(display "•"))
> (add-text-properties 27 28 '(display "•"))
> (add-text-properties 57 58 '(display "•"))
> (add-text-properties 72 73 '(display "•"))
>
> and this input file (which mimics org-indent).
>
> * h1
> ** h2
> - a.y.........
> - x...........
> *** h3
> **** h4
> - ....w.......
> - z...........
>
> With the cursor on x, pressing up moves it to y instead of a, and pressing
> down moves it back to x. The
> amount moved depends on the indentation added by line-prefix: with the cursor
> on z, pressing up moves it to
> w.
Thanks, should be fixed now on the emacs-29 branch.
(This bug was a leftover from incomplete fix of bug#49695.)