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Undelete deleted frames.

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* lisp/frame.el (undelete-frame): New command.
(undelete-frame--handle-delete-frame): New auxiliary function.
(undelete-frame--deleted-frames): New auxiliary variables.
(undelete-frame-mode): New minor mode.
(ctl-x-5-map): Bind the new command.

* etc/NEWS: Document the new command and minor mode.

* src/frame.c (Fdelete_frame): Update docstring, and mention the
minor mode.

* lisp/menu-bar.el (menu-bar-file-menu): Add an entry for the
new command.

* doc/emacs/frames.tex (Frame Commands): Document the new command
and minor mode.

See bug#51883.
This commit is contained in:
Gregory Heytings 2022-01-13 10:31:43 +02:00 • committed by Juri Linkov
parent 46f24bf08f
commit 48159c16b5
5 changed files with 110 additions and 3 deletions
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5
src/frame.c
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@ -2382,9 +2382,12 @@ delete_frame (Lisp_Object frame, Lisp_Object force)
}
DEFUN ("delete-frame", Fdelete_frame, Sdelete_frame, 0, 2, "",
doc: /* Delete FRAME, permanently eliminating it from use.
doc: /* Delete FRAME, eliminating it from use.
FRAME must be a live frame and defaults to the selected one.
When `undelete-frame-mode' is enabled, the 16 most recently deleted
frames can be undeleted with `undelete-frame', which see.
A frame may not be deleted if its minibuffer serves as surrogate
minibuffer for another frame. Normally, you may not delete a frame if
all other frames are invisible, but if the second optional argument