GNU bug report logs - #61850
29.0.60; Emacs 29 removes the ability to suppress ediff frames

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

From: Morgan Willcock <morgan <at> ice9.digital>
To: bug-gnu-emacs <at> gnu.org
Subject: 29.0.60; Emacs 29 removes the ability to suppress ediff frames
Date: Mon, 27 Feb 2023 12:32:52 +0000

It no longer seems possible to prevent ediff creating additional frames.
Previously this behaviour could be altered with:

  (advice-add 'ediff-window-display-p :override #'ignore)

This no longer seems to work, I imagine because this functions is now an
alias:

  (define-obsolete-function-alias 'ediff-window-display-p #'display-graphic-p "29.1")

The problems caused by opening an additional frame do not necessarily
correspond with the result of display-graphic-p. For example, when using
EXWM a frame is a workspace and creating a new workspace is unlikely to
be desirable or usable within an ediff session.

If ediff-window-display-p is obsolete I think there needs to be a custom
variable added to allow users to suppress the creation of new frames by
ediff.

Thanks,
Morgan


In GNU Emacs 29.0.60 (build 1, x86_64-w64-mingw32) of 2023-02-19 built
 on AVALON
Repository revision: 497ed0fb42e90b9f1815b520fc632a2f70eb43e1
Repository branch: emacs-29
Windowing system distributor 'Microsoft Corp.', version 10.0.19044
System Description: Microsoft Windows 10 Pro (v10.0.2009.19044.2604)

Configured using:
 'configure --with-modules --without-dbus --with-native-compilation
 --without-compress-install CFLAGS=-O2'

Configured features:
ACL GIF GMP GNUTLS HARFBUZZ JPEG JSON LCMS2 LIBXML2 MODULES NATIVE_COMP
NOTIFY W32NOTIFY PDUMPER PNG RSVG SOUND SQLITE3 THREADS TIFF
TOOLKIT_SCROLL_BARS WEBP XPM ZLIB

(NATIVE_COMP present but libgccjit not available)

Important settings:
  value of $LANG: ENG
  locale-coding-system: cp1252

Major mode: ELisp/l

Minor modes in effect:
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  global-corfu-mode: t
  corfu-mode: t
  which-key-mode: t
  erc-spelling-mode: t
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  minibuffer-electric-default-mode: t
  minibuffer-depth-indicate-mode: t
  recentf-mode: t
  shell-dirtrack-mode: t
  global-hl-line-mode: t
  display-time-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  show-paren-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
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

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(shadow emacsbug shortdoc ediff-ptch ediff-vers pcmpl-unix sh-script
executable url-http url-gw url-cache url-auth emacs-news-mode two-column
view log-edit add-log gnus-search eieio-opt speedbar ezimage dframe
cl-print help-fns radix-tree tramp-cmds mhtml-mode css-mode smie js
c-ts-common goto-addr mule-util cal-move smerge-mode diff vc misearch
multi-isearch vc-cvs vc-rcs log-view pcvs-util tramp-cache time-stamp
tramp-sh tramp tramp-loaddefs trampver tramp-integration cus-edit
cus-start cus-load files-x tramp-compat sort mm-archive mail-extr
textsec uni-scripts idna-mapping ucs-normalize uni-confusable
textsec-check qp gnus-async gnus-bcklg gnus-ml jabber-keepalive
jabber-ping jabber-bookmarks jabber jabber-libnotify jabber-awesome
jabber-osd jabber-wmii jabber-xmessage jabber-festival jabber-sawfish
jabber-ratpoison jabber-tmux jabber-screen jabber-socks5
jabber-ft-server jabber-si-server jabber-ft-client jabber-ft-common
jabber-si-client jabber-si-common jabber-feature-neg jabber-truncate
jabber-time jabber-autoaway jabber-vcard-avatars jabber-chatstates
jabber-events jabber-vcard jabber-avatar jabber-activity jabber-watch
jabber-modeline jabber-ahc-presence jabber-ahc jabber-version
jabber-ourversion jabber-muc-nick-completion hippie-exp jabber-browse
jabber-search jabber-register jabber-roster jabber-private
jabber-presence jabber-muc jabber-muc-nick-coloring hexrgb
jabber-newdisco jabber-widget jabber-disco jabber-chat jabber-history
jabber-chatbuffer jabber-alert jabber-iq jabber-core jabber-console
sgml-mode facemenu ewoc jabber-keymap jabber-sasl sasl sasl-anonymous
sasl-login sasl-plain fsm jabber-logon cl jabber-conn srv dns starttls
tls jabber-xml jabber-menu jabber-util gnus-topic nndraft nnmh utf-7
cursor-sensor epa-file network-stream nsm nnfolder nnnil gnus-agent
gnus-srvr gnus-score score-mode nnvirtual nntp gnus-cache server
org-duration cal-iso autorevert face-remap display-fill-column-indicator
vertico-reverse vertico-quick vertico-multiform vertico-flat
vertico-directory vertico corfu sly sly-completion sly-buttons
sly-messages sly-common apropos etags fileloop xref arc-mode
archive-mode hyperspec plantuml-mode dash orderless powershell compile
jabber-autoloads yaml-mode markdown-mode lua-mode advice edmacro kmacro
kixtart-mode tempo imenu org-msg let-alist color ox-odt rng-loc rng-uri
rng-parse rng-match rng-dt rng-util rng-pttrn nxml-parse nxml-ns
nxml-enc xmltok nxml-util ox-latex ox-icalendar ox-html table ox-ascii
ox-publish ox htmlize gnus-msg gnus-icalendar icalendar gnus-dired
gnus-cite which-key ags-mode cc-langs cc-mode cc-fonts cc-guess cc-menus
cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs python project
treesit erc-spelling flyspell erc-goodies erc pp erc-backend
erc-networks erc-common erc-compat compat erc-loaddefs ediff ediff-merg
ediff-mult ediff-wind ediff-diff ediff-help ediff-init ediff-util
dired-aux vc-git diff-mode easy-mmode vc-dispatcher org-indent oc-basic
cl-extra org-element org-persist org-id avl-tree generator ol-eww eww
xdg url-queue thingatpt mm-url ol-rmail ol-mhe ol-irc ol-info ol-gnus
nnselect gnus-art mm-uu mml2015 mm-view mml-smime smime gnutls dig
gnus-sum gnus-group gnus-undo gnus-start gnus-dbus dbus gnus-cloud
nnimap nnmail mail-source utf7 nnoo parse-time gnus-spec gnus-int
gnus-range gnus-win ol-docview doc-view filenotify jka-compr image-mode
exif ol-bibtex bibtex iso8601 ol-bbdb ol-w3m ol-doi org-link-doi
org-agenda appt diary-lib diary-loaddefs org-capture org-refile ob-shell
ob-plantuml ob-dot org-clock org ob ob-tangle ob-ref ob-lob ob-table
ob-exp org-macro org-src ob-comint org-pcomplete org-list org-footnote
org-faces org-entities noutline outline icons ob-emacs-lisp ob-core
ob-eval org-cycle org-table ol rx org-fold org-fold-core org-keys oc
org-loaddefs cal-menu calendar cal-loaddefs org-version org-compat
org-macs format-spec autoinsert savehist minibuf-eldef mb-depth recentf
tree-widget ibuffer ibuffer-loaddefs shell pcomplete comint ansi-osc
ansi-color ring hl-line time gnus nnheader range wid-edit ispell shr
pixel-fill kinsoku url-file svg xml dom modus-vivendi-theme modus-themes
ecomplete message sendmail yank-media puny dired dired-loaddefs rfc822
mml mml-sec epa derived epg rfc6068 epg-config gnus-util
text-property-search time-date mm-decode mm-bodies mm-encode mail-parse
rfc2231 rfc2047 rfc2045 mm-util ietf-drums mail-prsvr mailabbrev
mail-utils gmm-utils mailheader help-mode find-func pcase
yaml-mode-autoloads which-key-autoloads vertico-autoloads sly-autoloads
php-mode-autoloads org-autoloads orderless-autoloads
modus-themes-autoloads markdown-mode-autoloads lua-mode-autoloads
htmlize-autoloads dash-autoloads corfu-autoloads info compat-autoloads
package browse-url url url-proxy url-privacy url-expand url-methods
url-history url-cookie generate-lisp-file url-domsuf url-util mailcap
url-handlers url-parse auth-source cl-seq eieio eieio-core cl-macs
password-cache json subr-x map byte-opt gv bytecomp byte-compile
url-vars cl-loaddefs cl-lib rmc iso-transl tooltip cconv eldoc paren
electric uniquify ediff-hook vc-hooks lisp-float-type elisp-mode mwheel
dos-w32 ls-lisp disp-table term/w32-win w32-win w32-vars term/common-win
tool-bar dnd fontset image regexp-opt fringe tabulated-list replace
newcomment text-mode lisp-mode prog-mode register page tab-bar menu-bar
rfn-eshadow isearch easymenu timer select scroll-bar mouse jit-lock
font-lock syntax font-core term/tty-colors frame minibuffer nadvice seq
simple cl-generic indonesian philippine cham georgian utf-8-lang
misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms
cp51932 hebrew greek romanian slovak czech european ethiopic indian
cyrillic chinese composite emoji-zwj charscript charprop case-table
epa-hook jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button
loaddefs theme-loaddefs faces cus-face macroexp files window
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget keymap hashtable-print-readable backquote threads
w32notify w32 lcms2 multi-tty make-network-process native-compile emacs)

Memory information:
((conses 16 1660441 112217)
 (symbols 48 49094 8)
 (strings 32 349337 12805)
 (string-bytes 1 9312025)
 (vectors 16 135921)
 (vector-slots 8 2512230 136946)
 (floats 8 800 237)
 (intervals 56 114320 7827)
 (buffers 976 61))

Message #8 received at 61850 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Morgan Willcock <morgan <at> ice9.digital>
Cc: 61850 <at> debbugs.gnu.org
Subject: Re: bug#61850: 29.0.60;
 Emacs 29 removes the ability to suppress ediff frames
Date: Mon, 27 Feb 2023 22:02:09 +0200

> From: Morgan Willcock <morgan <at> ice9.digital>
> Date: Mon, 27 Feb 2023 12:32:52 +0000
> 
> If ediff-window-display-p is obsolete I think there needs to be a custom
> variable added to allow users to suppress the creation of new frames by
> ediff.

I agree.  Would you like to submit a patch to that effect?

Message #11 received at 61850 <at> debbugs.gnu.org (full text, mbox):

From: Daniel Martín <mardani29 <at> yahoo.es>
To: Morgan Willcock <morgan <at> ice9.digital>
Cc: 61850 <at> debbugs.gnu.org
Subject: Re: bug#61850: 29.0.60; Emacs 29 removes the ability to suppress
 ediff frames
Date: Mon, 27 Feb 2023 21:56:29 +0100

Morgan Willcock <morgan <at> ice9.digital> writes:

> It no longer seems possible to prevent ediff creating additional frames.
> Previously this behaviour could be altered with:
>
>   (advice-add 'ediff-window-display-p :override #'ignore)
>
> This no longer seems to work, I imagine because this functions is now an
> alias:
>
>   (define-obsolete-function-alias 'ediff-window-display-p #'display-graphic-p "29.1")
>
> The problems caused by opening an additional frame do not necessarily
> correspond with the result of display-graphic-p. For example, when using
> EXWM a frame is a workspace and creating a new workspace is unlikely to
> be desirable or usable within an ediff session.
>
> If ediff-window-display-p is obsolete I think there needs to be a custom
> variable added to allow users to suppress the creation of new frames by
> ediff.

I think the supported way to make Ediff work in a single frame is the
following:

(setq ediff-window-setup-function 'ediff-setup-windows-plain)

Message #14 received at 61850 <at> debbugs.gnu.org (full text, mbox):

From: Morgan Willcock <morgan <at> ice9.digital>
To: Daniel Martín <mardani29 <at> yahoo.es>
Cc: 61850 <at> debbugs.gnu.org
Subject: Re: bug#61850: 29.0.60; Emacs 29 removes the ability to suppress
 ediff frames
Date: Mon, 27 Feb 2023 21:19:15 +0000

Daniel Martín <mardani29 <at> yahoo.es> writes:

> I think the supported way to make Ediff work in a single frame is the
> following:
>
> (setq ediff-window-setup-function 'ediff-setup-windows-plain)

You are absolutely correct.  I went looking for where to add an option
and have just found the same variable, which works with no issues.

Apologies for the noise.

Message #19 received at 61850-done <at> debbugs.gnu.org (full text, mbox):

From: Daniel Martín <mardani29 <at> yahoo.es>
To: Morgan Willcock <morgan <at> ice9.digital>
Cc: 61850-done <at> debbugs.gnu.org
Subject: Re: bug#61850: 29.0.60; Emacs 29 removes the ability to suppress
 ediff frames
Date: Tue, 28 Feb 2023 11:37:57 +0100

Morgan Willcock <morgan <at> ice9.digital> writes:

> Daniel Martín <mardani29 <at> yahoo.es> writes:
>
>> I think the supported way to make Ediff work in a single frame is the
>> following:
>>
>> (setq ediff-window-setup-function 'ediff-setup-windows-plain)
>
> You are absolutely correct.  I went looking for where to add an option
> and have just found the same variable, which works with no issues.
>
> Apologies for the noise.

No worries, I'm closing this bug, then.

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