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bug#51632: Emacs 28: posn-at-x-y fails to take a tab line into account.
From: |
Eli Zaretskii |
Subject: |
bug#51632: Emacs 28: posn-at-x-y fails to take a tab line into account. |
Date: |
Sat, 06 Nov 2021 21:13:28 +0200 |
> From: martin rudalics <rudalics@gmx.at>
> Date: Sat, 6 Nov 2021 19:50:23 +0100
>
> > (i) emacs -Q
> > (ii) C-u C-h i <and info file> RET
> > (iii) M-: (point) ; Note this value
> > (iv) M-: (posn-at-x-y 0 18) ; Where 18 is the height of your default
> > font. Note that the second element of the result matches that from
> > (iii)
> >
> > (v) M-x tab-bar-mode RET
> > (vi) M-: (posn-at-x-y 0 18) ; This returns the same as (iv).
> >
> > Because of the tab line, (vi) should return the symbol `header-line' in
> > its second element, not the same as (iv). This is a bug.
>
> I'm not sure I understand. 'tab-bar-mode' puts a tab bar on top of the
> frame. How is this related to 'posn-at-x-y' which, by default, deals
> with the selected window?
It should be "tab-line-mode".