GNU bug report logs - #45035
28.0.50; Command completion annotations show minibuffer keybindings

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Omar Antolín Camarena <omar <at> matem.unam.mx>
To: bug-gnu-emacs <at> gnu.org
Subject: 28.0.50; Command completion annotations show minibuffer keybindings
Date: Thu, 03 Dec 2020 19:00:03 -0600

If from M-x you switch to the *Completions* buffer, it will show
keybindings as annotations next to the command names. Unfortunately, it
shows the key bindings that are active in the minibuffer, while it would
be more useful to show the keybindings active in the buffer in which you pressed M-x.

Here's a simple recipe to see the issue from emacs -Q:

Run emacs -Q. You will have eval-print-last-sexp bound to C-j in the
scratch buffer, and minibuffer-complete-and-exit bound to C-j in the
minibuffer, of course.

Try this: while in the scratch buffer, type M-x and part of either of
those two commands, and then press M-v to switch to the *Completions*
buffer. For eval-print-last-sexp you'll see no annotation, and for
minibuffer-complete-and-exit you'll see C-j.

This illustrates the fact that the key bindings in the annotation are
those from the minibuffer.

The problem is that when the function read-extended-command--annotation
is called, the minibuffer is active. If people agree that it would be
better to show the key bindings in the last buffer active before the
minibuffer, one way to get this behavior is by modifying
minibuffer-completion-help. That function obtains the
annotation-function metadatum and stores it in a variable called afun.
The form that actually calls afun could be wrapped in with-minibuffer-selected-window, for example.


In GNU Emacs 28.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.5, cairo version 1.16.0)
 of 2020-10-13, unofficial emacs-snapshot build: http://emacs.ganneff.de/, git commit 8d241e8840fdb02dcfce52425626dd8f2125e51a built on runner-f98bf451-project-26-concurrent-0
Repository revision: 477b2e1134f358938ef4e9cff151d59f0c4ff8e8
Repository branch: HEAD
Windowing system distributor 'The X.Org Foundation', version 11.0.12008000
System Description: Debian GNU/Linux 10 (buster)

Configured using:
 'configure --build x86_64-linux-gnu --prefix=/usr
 --sharedstatedir=/var/lib --libexecdir=/usr/lib
 --localstatedir=/var/lib --infodir=/usr/share/info
 --mandir=/usr/share/man --with-pop=yes
 --enable-locallisppath=/etc/emacs-snapshot:/etc/emacs:/usr/local/share/emacs/28.0.50/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/28.0.50/site-lisp:/usr/share/emacs/site-lisp
 --build x86_64-linux-gnu --prefix=/usr --sharedstatedir=/var/lib
 --libexecdir=/usr/lib --localstatedir=/var/lib
 --infodir=/usr/share/info --mandir=/usr/share/man --with-pop=yes
 --enable-locallisppath=/etc/emacs-snapshot:/etc/emacs:/usr/local/share/emacs/28.0.50/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/28.0.50/site-lisp:/usr/share/emacs/site-lisp
 --with-x=yes --with-x-toolkit=gtk3 --with-toolkit-scroll-bars
 'CFLAGS=-g -O2
 -fdebug-prefix-map=/builds/joerg/emacs/buster_amd64/emacs-snapshot-20200927+emacs-27.1-2446-g8d241e8840=.
 -fstack-protector-strong -Wformat -Werror=format-security -Wall
 -fno-omit-frame-pointer' 'CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=2'
 LDFLAGS=-Wl,-z,relro'

Configured features:
XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND GPM DBUS GSETTINGS GLIB NOTIFY
INOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF
ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS PDUMPER LCMS2

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: ELisp/l

Minor modes in effect:
  minibuffer-electric-default-mode: t
  flimenu-global-mode: t
  flimenu-mode: t
  magit-auto-revert-mode: t
  auto-revert-mode: t
  global-git-commit-mode: t
  async-bytecomp-package-mode: t
  shell-dirtrack-mode: t
  show-paren-mode: t
  electric-pair-mode: t
  beginend-global-mode: t
  beginend-prog-mode: t
  global-dot-mode: t
  dot-mode: t
  marginalia-mode: t
  icomplete-vertical-mode: t
  icomplete-mode: t
  gcmh-mode: t
  override-global-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

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/home/omarantolin/.emacs.d/elpa/org-plus-contrib-20201130/ob-comint hides /usr/share/emacs/28.0.50/lisp/org/ob-comint
/home/omarantolin/.emacs.d/elpa/org-plus-contrib-20201130/ob-clojure hides /usr/share/emacs/28.0.50/lisp/org/ob-clojure
/home/omarantolin/.emacs.d/elpa/org-plus-contrib-20201130/ob-calc hides /usr/share/emacs/28.0.50/lisp/org/ob-calc
/home/omarantolin/.emacs.d/elpa/org-plus-contrib-20201130/ob-awk hides /usr/share/emacs/28.0.50/lisp/org/ob-awk
/home/omarantolin/.emacs.d/elpa/org-plus-contrib-20201130/ob-asymptote hides /usr/share/emacs/28.0.50/lisp/org/ob-asymptote
/home/omarantolin/.emacs.d/elpa/org-plus-contrib-20201130/ob-abc hides /usr/share/emacs/28.0.50/lisp/org/ob-abc
/home/omarantolin/.emacs.d/elpa/org-plus-contrib-20201130/ob-R hides /usr/share/emacs/28.0.50/lisp/org/ob-R
/home/omarantolin/.emacs.d/elpa/org-plus-contrib-20201130/ob-J hides /usr/share/emacs/28.0.50/lisp/org/ob-J
/home/omarantolin/.emacs.d/elpa/org-plus-contrib-20201130/ob-C hides /usr/share/emacs/28.0.50/lisp/org/ob-C

Features:
(shadow sort bbdb-message mailalias bbdb-mua bbdb-com bbdb bbdb-site
timezone mail-extr emacsbug sendmail misc minibuffer-extras
minibuf-eldef eieio-opt speedbar ezimage dframe dabbrev misc-text vc-bzr
vc-src vc-sccs vc-svn vc-cvs vc-rcs vc vc-dispatcher bug-reference
magit-extras face-remap magit-submodule magit-obsolete magit-blame
magit-stash magit-reflog magit-bisect magit-push magit-pull magit-fetch
magit-clone magit-remote magit-commit magit-sequence magit-notes
magit-worktree magit-tag magit-merge magit-branch magit-reset
magit-files magit-refs magit-status magit magit-repos magit-apply
magit-wip magit-log which-func flimenu imenu magit-diff smerge-mode diff
magit-core magit-autorevert autorevert filenotify magit-margin
magit-transient magit-process magit-mode git-commit transient
format-spec magit-git magit-section magit-utils crm log-edit message rmc
puny dired dired-loaddefs rfc822 mml mml-sec epa epg epg-config
gnus-util rmail rmail-loaddefs text-property-search mm-decode mm-bodies
mm-encode mail-parse rfc2231 rfc2047 rfc2045 mm-util ietf-drums
mail-prsvr mailabbrev mail-utils gmm-utils mailheader pcvs-util add-log
with-editor async-bytecomp advice async shell pcomplete server dash
derived compile comint ansi-color executable view jka-compr pulse xref
project isearch-extras misearch multi-isearch vc-git diff-mode cl-print
debug backtrace find-func mule-util help-fns radix-tree cus-edit
cus-start cus-load wid-edit time-date email-config markdown-mode rx
color noutline outline pdf-loader paren elec-pair ace-link avy ring
beginend dot-mode marginalia embark ffap thingatpt icomplete-vertical
icomplete orderless completing-history block-undo modus-vivendi-theme
modus-operandi-theme pcase gcmh diminish cl-extra help-mode use-package
use-package-ensure use-package-delight use-package-diminish
use-package-bind-key bind-key easy-mmode use-package-core finder-inf
edmacro kmacro tex-site slime-autoloads info package easymenu browse-url
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eieio-loaddefs password-cache json subr-x map url-vars seq byte-opt gv
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term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe
tabulated-list replace newcomment text-mode elisp-mode lisp-mode
prog-mode register page tab-bar menu-bar rfn-eshadow isearch timer
select scroll-bar mouse jit-lock font-lock syntax facemenu font-core
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cyrillic chinese composite charscript charprop case-table epa-hook
jka-cmpr-hook help simple abbrev obarray cl-preloaded nadvice button
loaddefs faces cus-face macroexp files window text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote threads dbusbind inotify lcms2
dynamic-setting system-font-setting font-render-setting cairo
move-toolbar gtk x-toolkit x multi-tty make-network-process emacs)

Memory information:
((conses 16 479513 142115)
 (symbols 48 28479 2)
 (strings 32 122570 11474)
 (string-bytes 1 3390131)
 (vectors 16 47955)
 (vector-slots 8 1232246 99268)
 (floats 8 264 828)
 (intervals 56 3228 738)
 (buffers 992 29))

Message #8 received at 45035 <at> debbugs.gnu.org (full text, mbox):

From: Juri Linkov <juri <at> linkov.net>
To: Omar Antolín Camarena <omar <at> matem.unam.mx>
Cc: 45035 <at> debbugs.gnu.org
Subject: Re: bug#45035: 28.0.50; Command completion annotations show
 minibuffer keybindings
Date: Sat, 05 Dec 2020 22:51:41 +0200

> If from M-x you switch to the *Completions* buffer, it will show
> keybindings as annotations next to the command names. Unfortunately, it
> shows the key bindings that are active in the minibuffer, while it would
> be more useful to show the keybindings active in the buffer in which you pressed M-x.
>
> Here's a simple recipe to see the issue from emacs -Q:
>
> Run emacs -Q. You will have eval-print-last-sexp bound to C-j in the
> scratch buffer, and minibuffer-complete-and-exit bound to C-j in the
> minibuffer, of course.
>
> Try this: while in the scratch buffer, type M-x and part of either of
> those two commands, and then press M-v to switch to the *Completions*
> buffer. For eval-print-last-sexp you'll see no annotation, and for
> minibuffer-complete-and-exit you'll see C-j.
>
> This illustrates the fact that the key bindings in the annotation are
> those from the minibuffer.
>
> The problem is that when the function read-extended-command--annotation
> is called, the minibuffer is active. If people agree that it would be
> better to show the key bindings in the last buffer active before the
> minibuffer, one way to get this behavior is by modifying
> minibuffer-completion-help. That function obtains the
> annotation-function metadatum and stores it in a variable called afun.
> The form that actually calls afun could be wrapped in with-minibuffer-selected-window, for example.

Thanks, I think your idea is correct.  But I'm not sure if
minibuffer-completion-help is the right place for wrapping in
with-minibuffer-selected-window.  This means that all calls of
annotation-function will be in the original buffer, whereas
only read-extended-command--annotation needs such wrapping.

Or do you care that such wrapping will be called for every command
in read-extended-command--annotation?  Then instead of annotation-function
you could try to use a new function affixation-function that is called
only once, so you could add wrapping to it.

Message #11 received at 45035 <at> debbugs.gnu.org (full text, mbox):

From: Omar Antolín Camarena <omar <at> matem.unam.mx>
To: Juri Linkov <juri <at> linkov.net>
Cc: 45035 <at> debbugs.gnu.org
Subject: Re: bug#45035: 28.0.50; Command completion annotations show
 minibuffer keybindings
Date: Sun, 06 Dec 2020 20:50:04 -0600

> Thanks, I think your idea is correct.  But I'm not sure if
> minibuffer-completion-help is the right place for wrapping in
> with-minibuffer-selected-window.  This means that all calls of
> annotation-function will be in the original buffer, whereas
> only read-extended-command--annotation needs such wrapping.

Oh, that's a very good point. Probably it would be best to leave
minibuffer-completion-help as is, and change only
read-extended-command--annotation.

> Or do you care that such wrapping will be called for every command
> in read-extended-command--annotation?  Then instead of annotation-function
> you could try to use a new function affixation-function that is called
> only once, so you could add wrapping to it.

My Emacs doesn't have affixation-function yet, so I don't really know
anything about it.

-- 
Omar

Message #14 received at 45035 <at> debbugs.gnu.org (full text, mbox):

From: Juri Linkov <juri <at> linkov.net>
To: Omar Antolín Camarena <omar <at> matem.unam.mx>
Cc: 45035 <at> debbugs.gnu.org
Subject: Re: bug#45035: 28.0.50; Command completion annotations show
 minibuffer keybindings
Date: Wed, 16 Dec 2020 11:15:40 +0200

[Message part 1 (text/plain, inline)]

>> Thanks, I think your idea is correct.  But I'm not sure if
>> minibuffer-completion-help is the right place for wrapping in
>> with-minibuffer-selected-window.  This means that all calls of
>> annotation-function will be in the original buffer, whereas
>> only read-extended-command--annotation needs such wrapping.
>
> Oh, that's a very good point. Probably it would be best to leave
> minibuffer-completion-help as is, and change only
> read-extended-command--annotation.
>
>> Or do you care that such wrapping will be called for every command
>> in read-extended-command--annotation?  Then instead of annotation-function
>> you could try to use a new function affixation-function that is called
>> only once, so you could add wrapping to it.
>
> My Emacs doesn't have affixation-function yet, so I don't really know
> anything about it.

I'm sorry that your version of Emacs is not updated too often.
So here I created a patch based on current master, and after
pushing it, sometimes it will arrive to your updated version.

[read-extended-command--affixation.patch (text/x-diff, inline)]

diff --git a/lisp/simple.el b/lisp/simple.el
index c309df11ad..f669996c2f 100644
--- a/lisp/simple.el
+++ b/lisp/simple.el
@@ -1958,22 +1958,27 @@ read-extended-command
      (lambda (string pred action)
        (if (and suggest-key-bindings (eq action 'metadata))
 	   '(metadata
-	     (annotation-function . read-extended-command--annotation)
+	     (affixation-function . read-extended-command--affixation)
 	     (category . command))
          (complete-with-action action obarray string pred)))
      #'commandp t nil 'extended-command-history)))
 
-(defun read-extended-command--annotation (command-name)
-  (let* ((fun (and (stringp command-name) (intern-soft command-name)))
-         (binding (where-is-internal fun overriding-local-map t))
-         (obsolete (get fun 'byte-obsolete-info))
-         (alias (symbol-function fun)))
-    (cond ((symbolp alias)
-           (format " (%s)" alias))
-          (obsolete
-           (format " (%s)" (car obsolete)))
-          ((and binding (not (stringp binding)))
-           (format " (%s)" (key-description binding))))))
+(defun read-extended-command--affixation (command-names)
+  (with-selected-window (or (minibuffer-selected-window) (selected-window))
+    (mapcar
+     (lambda (command-name)
+       (let* ((fun (and (stringp command-name) (intern-soft command-name)))
+              (binding (where-is-internal fun overriding-local-map t))
+              (obsolete (get fun 'byte-obsolete-info))
+              (alias (symbol-function fun))
+              (suffix (cond ((symbolp alias)
+                             (format " (%s)" alias))
+                            (obsolete
+                             (format " (%s)" (car obsolete)))
+                            ((and binding (not (stringp binding)))
+                             (format " (%s)" (key-description binding))))))
+         (if suffix (list command-name suffix) command-name)))
+     command-names)))
 
 (defcustom suggest-key-bindings t
   "Non-nil means show the equivalent key-binding when M-x command has one.

Message #17 received at 45035 <at> debbugs.gnu.org (full text, mbox):

From: Omar Antolín Camarena <omar <at> matem.unam.mx>
To: Juri Linkov <juri <at> linkov.net>
Cc: 45035 <at> debbugs.gnu.org
Subject: Re: bug#45035: 28.0.50; Command completion annotations show
 minibuffer keybindings
Date: Wed, 16 Dec 2020 15:27:30 -0600

> I'm sorry that your version of Emacs is not updated too often.
> So here I created a patch based on current master, and after
> pushing it, sometimes it will arrive to your updated version.

Fantastic, thank you!

-- 
Omar

Message #20 received at 45035 <at> debbugs.gnu.org (full text, mbox):

From: Juri Linkov <juri <at> linkov.net>
To: Omar Antolín Camarena <omar <at> matem.unam.mx>
Cc: 45035 <at> debbugs.gnu.org
Subject: Re: bug#45035: 28.0.50; Command completion annotations show
 minibuffer keybindings
Date: Wed, 16 Dec 2020 23:27:48 +0200

tags 45035 fixed
close 45035 28.0.50
thanks

>>> Thanks, I think your idea is correct.  But I'm not sure if
>>> minibuffer-completion-help is the right place for wrapping in
>>> with-minibuffer-selected-window.  This means that all calls of
>>> annotation-function will be in the original buffer, whereas
>>> only read-extended-command--annotation needs such wrapping.
>>
>> Oh, that's a very good point. Probably it would be best to leave
>> minibuffer-completion-help as is, and change only
>> read-extended-command--annotation.
>>
>>> Or do you care that such wrapping will be called for every command
>>> in read-extended-command--annotation?  Then instead of annotation-function
>>> you could try to use a new function affixation-function that is called
>>> only once, so you could add wrapping to it.
>>
>> My Emacs doesn't have affixation-function yet, so I don't really know
>> anything about it.
>
> I'm sorry that your version of Emacs is not updated too often.
> So here I created a patch based on current master, and after
> pushing it, sometimes it will arrive to your updated version.

Now pushed to master, and closed.

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