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Handle resizing of fullscreen frames more consistently (Bug#79704)

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* src/frame.c (adjust_frame_size): Honor new option
'alter-fullscreen-frames'.
(syms_of_frame) <alter-fullscreen-frames>: New option to
maintain consistent state when attempting to resize fullscreen
frames.  Default to 'inhibit' for NS builds because these
resized the frame while leaving the 'fullscreen' parameter alone
(Bug#79704).
(syms_of_frame) <Qinhibit>: Define symbol.
* lisp/cus-start.el (standard): Add customization options for
'alter-fullscreen-frames'
* doc/lispref/frames.texi (Frame Size): Describe new option
'alter-fullscreen-frames'.
* etc/NEWS: Call out new option 'alter-fullscreen-frames'.
This commit is contained in:
Martin Rudalics 2025-11-02 09:24:05 +01:00
parent fae5ced1ac
commit 2c4e7a99cc
4 changed files with 91 additions and 0 deletions
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31
doc/lispref/frames.texi
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@ -1234,6 +1234,37 @@ bottom corner of the frame. The parameters @code{min-width} and
@code{min-height} (@pxref{Size Parameters}) can be used to obtain a
similar behavior when changing the frame size from within Emacs.
When a frame is in a fullscreen state (@pxref{Size Parameters}),
requests to change the frame size via one of these functions may be
supported or refused either by Emacs itself or by the window manager.
The following variable provides more control of the resulting behavior.
@cindex altering the size of fullscreen frames
@cindex resizing fullscreen frames
@defopt alter-fullscreen-frames
This options controls how to handle requests to alter fullscreen frames.
Emacs consults it when asked to resize a fullscreen frame via functions
like @code{set-frame-size} or when setting the @code{width} or
@code{height} parameter of a frame. The following values are provided:
@table @code
@item nil
This will forward the resize request to the window manager and leave it
to the latter how to proceed.
@item t
This will first reset the fullscreen status and then forward the resize
request on to the window manager.
@item inhibit
This will reject the resize request and leave the fullscreen status
unchanged.
@end table
The default is @code{inhibit} on NS builds and @code{nil} everywhere
else.
@end defopt
@cindex tracking frame size changes
The abnormal hook @code{window-size-change-functions} (@pxref{Window
Hooks}) tracks all changes of the inner size of a frame including those