* lisp/frame.el (delete-other-frames): Add universal prefix `iconify` arg

(frame--current-backround-mode): New function,
extracted from `frame-set-background-mode`.  Use `color-dark-p`.
(frame-set-background-mode): Use it.

1 files changed, 4 insertions, 1 deletions

diff --git a/doc/lispref/frames.texi b/doc/lispref/frames.texi
index cd2ff8f3b31..a9d20c543da 100644
--- a/doc/lispref/frames.texi
+++ b/doc/lispref/frames.texi
@@ -2628,7 +2628,7 @@ When Emacs gets one of these commands, it generates a
 @code{delete-frame} event, whose normal definition is a command that
 calls the function @code{delete-frame}.  @xref{Misc Events}.
 
-@deffn Command delete-other-frames &optional frame
+@deffn Command delete-other-frames &optional frame iconify
 This command deletes all frames on @var{frame}'s terminal, except
 @var{frame}.  If @var{frame} uses another frame's minibuffer, that
 minibuffer frame is left untouched.  The argument @var{frame} must
@@ -2639,6 +2639,9 @@ this command works by calling @code{delete-frame} with @var{force}
 This function does not delete any of @var{frame}'s child frames
 (@pxref{Child Frames}).  If @var{frame} is a child frame, it deletes
 @var{frame}'s siblings only.
+
+With the prefix argument @var{iconify}, the frames are iconified rather
+than deleted.
 @end deffn