Tags: patch

This is a followup to recent changes introduced by

  bug#60954: 30.0.50; ERC >5.5: Stop requiring erc-goodies in erc.el

which moved the site of various top-level keybindings, such as
erc-button's <backtab>, to module-setup code. However, those changes
neglected to update `erc-button-{next,previous}' to work with the new
"merged" option of `erc-fill-wrap', which was added in:

  bug#60936: 30.0.50; ERC >5.5: Add erc-fill style based on visual-line-mode

While revisiting these commands, I also thought it helpful to slightly
alter the behavior of `erc-button-previous'. The original always moved
point to the end of the previous button, whereas the new version lands
you at the start. This might cause some churn for those using the
command in lisp code, but I think the UX improvement is likely worth it.
(FWIW, you can obtain the old behavior by removing an item from a hook.)

Beyond this, I've also freed `erc-button-previous' so that it's no
longer confined to the read-only message area but is instead allowed to
jump backward from the input area through the prompt. I've also re-bound
<TAB> in all ERC buffers to a new wrapper that only calls
`completion-at-point' from the input area and otherwise runs a hook for
modules to use as needed. As a consequence, I've deprecated
`erc-button-next-function', which no longer serves an obvious purpose.
Questions and comments welcome, as always.

Thanks.


In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
 3.24.35, cairo version 1.17.6) of 2023-04-12 built on localhost
Repository revision: 861cf3a5c9d2081d811dcfc2c5ce5357f3dc44d4
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12014000
System Description: Fedora Linux 36 (Workstation Edition)

Configured using:
 'configure --enable-check-lisp-object-type --enable-checking=yes,glyphs
 'CFLAGS=-O0 -g3'
 PKG_CONFIG_PATH=:/usr/lib64/pkgconfig:/usr/share/pkgconfig'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
JSON LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES NOTIFY
INOTIFY PDUMPER PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF
TOOLKIT_SCROLL_BARS WEBP X11 XDBE XIM XINPUT2 XPM GTK3 ZLIB

Important settings:
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
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  global-eldoc-mode: t
  eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  line-number-mode: t
  indent-tabs-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message mailcap 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 mailabbrev gmm-utils mailheader sendmail rfc2047
rfc2045 ietf-drums mm-util mail-prsvr mail-utils erc auth-source cl-seq
eieio eieio-core cl-macs password-cache json subr-x map format-spec
cl-loaddefs cl-lib erc-backend erc-networks byte-opt gv bytecomp
byte-compile erc-common erc-compat erc-loaddefs rmc iso-transl tooltip
cconv eldoc paren electric uniquify ediff-hook vc-hooks lisp-float-type
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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
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dynamic-setting system-font-setting font-render-setting cairo
move-toolbar gtk x-toolkit xinput2 x multi-tty make-network-process
emacs)

Memory information:
((conses 16 63110 9012)
 (symbols 48 8532 0)
 (strings 32 23158 1921)
 (string-bytes 1 669049)
 (vectors 16 14968)
 (vector-slots 8 206726 6655)
 (floats 8 24 39)
 (intervals 56 231 0)
 (buffers 976 10))