* bug#51632: Emacs 28: posn-at-x-y fails to take a tab line into account.
@ 2021-11-06 12:42 Alan Mackenzie
2021-11-06 18:50 ` martin rudalics
0 siblings, 1 reply; 4+ messages in thread
From: Alan Mackenzie @ 2021-11-06 12:42 UTC (permalink / raw)
To: 51632
Hello, Emacs.
In the emacs-28 branch (also master), in a GUI session:
(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.
--
Alan Mackenzie (Nuremberg, Germany).
^ permalink raw reply [flat|nested] 4+ messages in thread
* bug#51632: Emacs 28: posn-at-x-y fails to take a tab line into account.
2021-11-06 12:42 bug#51632: Emacs 28: posn-at-x-y fails to take a tab line into account Alan Mackenzie
@ 2021-11-06 18:50 ` martin rudalics
2021-11-06 19:13 ` Eli Zaretskii
0 siblings, 1 reply; 4+ messages in thread
From: martin rudalics @ 2021-11-06 18:50 UTC (permalink / raw)
To: Alan Mackenzie, 51632
> (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?
martin
^ permalink raw reply [flat|nested] 4+ messages in thread
* bug#51632: Emacs 28: posn-at-x-y fails to take a tab line into account.
2021-11-06 18:50 ` martin rudalics
@ 2021-11-06 19:13 ` Eli Zaretskii
2021-11-06 19:22 ` martin rudalics
0 siblings, 1 reply; 4+ messages in thread
From: Eli Zaretskii @ 2021-11-06 19:13 UTC (permalink / raw)
To: martin rudalics; +Cc: 51632, acm
> 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".
^ permalink raw reply [flat|nested] 4+ messages in thread
* bug#51632: Emacs 28: posn-at-x-y fails to take a tab line into account.
2021-11-06 19:13 ` Eli Zaretskii
@ 2021-11-06 19:22 ` martin rudalics
0 siblings, 0 replies; 4+ messages in thread
From: martin rudalics @ 2021-11-06 19:22 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: 51632, acm
>> 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".
In that case I get with emacs -Q on the release branch the following in
my *Messages* buffer:
Composing main Info directory...done
(#<window 3 on *info*> 173 (0 . 0) 0 (#("(dir)Top
" 0 8 (font-lock-face info-header-node)) . 0) 173 (0 . 0) nil (0 . 0) (9 . 18))
Tab-Line mode enabled in current buffer
(#<window 3 on *info*> header-line (8 . 18) 0 (#("No next, prev or up links -- This is the top of the INFO tree" 31 63 (fontified nil)) . 0) nil (0 . -1) nil (8 . 1) (9 . 18))
martin
^ permalink raw reply [flat|nested] 4+ messages in thread
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2021-11-06 12:42 bug#51632: Emacs 28: posn-at-x-y fails to take a tab line into account Alan Mackenzie
2021-11-06 18:50 ` martin rudalics
2021-11-06 19:13 ` Eli Zaretskii
2021-11-06 19:22 ` martin rudalics
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