bug#38684: 26.3; toggle menu bar twice may change frame height

bug#38684: 26.3; toggle menu bar twice may change frame height

[ynyaaa]

If the frame is narrow enough to display the menu bar for current buffer
in two lines and wide enough to display the menu bar for minibuffer in
one line, toggling menu bar using minibuffer(M-x menu-bar-mode) twice
enlarges the frame height.


In GNU Emacs 26.3 (build 1, x86_64-w64-mingw32)
 of 2019-08-29 built on CIRROCUMULUS
Repository revision: 96dd0196c28bc36779584e47fffcca433c9309cd
Windowing system distributor 'Microsoft Corp.', version 6.3.9600
Recent messages:

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bug#38684: 26.3; toggle menu bar twice may change frame height

[martin rudalics]

 > If the frame is narrow enough to display the menu bar for current buffer
 > in two lines and wide enough to display the menu bar for minibuffer in
 > one line, toggling menu bar using minibuffer(M-x menu-bar-mode) twice
 > enlarges the frame height.
 >
 >
 > In GNU Emacs 26.3 (build 1, x86_64-w64-mingw32)
 >   of 2019-08-29 built on CIRROCUMULUS
 > Repository revision: 96dd0196c28bc36779584e47fffcca433c9309cd
 > Windowing system distributor 'Microsoft Corp.', version 6.3.9600
 > Recent messages:

Adding 'menu-bar-lines' to 'frame-inhibit-implied-resize' should be
the second best cure for that (setting 'frame-inhibit-implied-resize'
to t being certainly the best).  Other than that, I strongly doubt
that anyone will fix such corner cases.  Or maybe you want to give it
a try?

martin

bug#38684: 26.3; toggle menu bar twice may change frame height

[ynyaaa]

martin rudalics <rudalics@gmx.at> writes:

>> If the frame is narrow enough to display the menu bar for current buffer
>> in two lines and wide enough to display the menu bar for minibuffer in
>> one line, toggling menu bar using minibuffer(M-x menu-bar-mode) twice
>> enlarges the frame height.
>>
>>
>> In GNU Emacs 26.3 (build 1, x86_64-w64-mingw32)
>>   of 2019-08-29 built on CIRROCUMULUS
>> Repository revision: 96dd0196c28bc36779584e47fffcca433c9309cd
>> Windowing system distributor 'Microsoft Corp.', version 6.3.9600
>> Recent messages:
>
> Adding 'menu-bar-lines' to 'frame-inhibit-implied-resize' should be
> the second best cure for that (setting 'frame-inhibit-implied-resize'
> to t being certainly the best).  Other than that, I strongly doubt
> that anyone will fix such corner cases.  Or maybe you want to give it
> a try?
>
> martin

I didn't know the variable. Thank you.

Descriptions in info (elisp)Implied Frame Resizing and
in help C-h v frame-inhibit-implied-resize slightly differ.

first paragraph
info: If this option is non-‘nil’, no implied resizing is done.
help: If this option is t, no such resizing is done.

second paragraph
info: The value of this option can be also a list
help: The value of this option can be also be a list

bug#38684: 26.3; toggle menu bar twice may change frame height

[martin rudalics]

 > Descriptions in info (elisp)Implied Frame Resizing and
 > in help C-h v frame-inhibit-implied-resize slightly differ.
 >
 > first paragraph
 > info: If this option is non-‘nil’, no implied resizing is done.
 > help: If this option is t, no such resizing is done.
 >
 > second paragraph
 > info: The value of this option can be also a list
 > help: The value of this option can be also be a list

These should be hopefully fixed now.  Many thanks for reading them
carefully.

Note also that in

 >>> If the frame is narrow enough to display the menu bar for current buffer
 >>> in two lines and wide enough to display the menu bar for minibuffer in
 >>> one line, toggling menu bar using minibuffer(M-x menu-bar-mode) twice
 >>> enlarges the frame height.

the term "twice" (or merely its position in the text) is misleading.
But, in fact, the bug already appears when you toggle the menu bar off
- the frame should correctly shrink in that case.

Thanks again, martin