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diff --git a/etc/NEWS.29 b/etc/NEWS.29 new file mode 100644 index 00000000000..84dbb94a71a --- /dev/null +++ b/etc/NEWS.29 @@ -0,0 +1,4940 @@ +GNU Emacs NEWS -- history of user-visible changes. + +Copyright (C) 2021-2023 Free Software Foundation, Inc. +See the end of the file for license conditions. + +Please send Emacs bug reports to 'bug-gnu-emacs@gnu.org'. +If possible, use 'M-x report-emacs-bug'. + +This file is about changes in Emacs version 29. + +See file HISTORY for a list of GNU Emacs versions and release dates. +See files NEWS.28, NEWS.27, ..., NEWS.18, and NEWS.1-17 for changes +in older Emacs versions. + +You can narrow news to a specific version by calling 'view-emacs-news' +with a prefix argument or by typing 'C-u C-h C-n'. + +Temporary note: ++++ indicates that all relevant manuals in doc/ have been updated. +--- means no change in the manuals is needed. +When you add a new item, use the appropriate mark if you are sure it +applies, and please also update docstrings as needed. + + +* Installation Changes in Emacs 29.1 + +--- +** Ahead-of-time native compilation can now be requested via configure. +Use '--with-native-compilation=aot' to request that all the Lisp files +in the Emacs tree should be natively compiled ahead of time. (This is +slow on most machines.) + +This feature existed in Emacs 28.1, but was less easy to request. + ++++ +** Emacs can be built with the tree-sitter parsing library. +This library, together with separate grammar libraries for each +language, provides incremental parsing capabilities for several +popular programming languages and other formatted files. Emacs built +with this library offers major modes, described elsewhere in this +file, that are based on the tree-sitter's parsers. If you have the +tree-sitter library installed, the configure script will automatically +include it in the build; use '--without-tree-sitter' at configure time +to disable that. + +Emacs modes based on the tree-sitter library require an additional +grammar library for each mode. These grammar libraries provide the +tree-sitter library with language-specific lexical analysis and +parsing capabilities, and are developed separately from the +tree-sitter library itself. If you don't have a grammar library +required by some Emacs major mode, and your distro doesn't provide it +as an installable package, you can compile and install such a library +yourself. Many libraries can be downloaded from the tree-sitter site: + + https://github.com/tree-sitter + +Emacs provides a user command, 'treesit-install-language-grammar', +that automates the download and build process of a grammar library. +It prompts for the language, the URL of the language grammar's VCS +repository, and then uses the installed C/C++ compiler to build the +library and install it. + +You can also do this manually. To compile such a library after +cloning its Git repository, compile the files "scanner.c" and +"parser.c" (sometimes named "scanner.cc" and "parser.cc") in the "src" +subdirectory of the library's source tree using the C or C++ compiler, +then link these two files into a shared library named +"libtree-sitter-LANG.so", where LANG is the name of the language +supported by the grammar as it is expected by the Emacs major mode +(for example, "c" for 'c-ts-mode', "cpp" for 'c++-ts-mode', "python" +for 'python-ts-mode', etc.). Then place the shared library you've +built in the same directory where you keep the other shared libraries +used by Emacs, or in the "tree-sitter" subdirectory of your +'user-emacs-directory', or in a directory mentioned in the variable +'treesit-extra-load-path'. + +You only need to install language grammar libraries required by the +Emacs modes you will use, as Emacs loads these libraries only when the +corresponding mode is turned on in some buffer for the first time in +an Emacs session. + ++++ +** Emacs can be built with built-in support for accessing SQLite databases. +This uses the popular sqlite3 library, and can be disabled by using +the '--without-sqlite3' option to the 'configure' script. + ++++ +** Support for the WebP image format. +This support is built by default when the libwebp library is +available, and includes support for animated WebP images. To disable +WebP support, use the '--without-webp' configure flag. Image +specifiers can now use ':type webp'. + ++++ +** Emacs has been ported to the Haiku operating system. +The configuration process should automatically detect and build for +Haiku. There is also an optional window-system port to Haiku, which +can be enabled by configuring Emacs with the option '--with-be-app', +which will require the Haiku Application Kit development headers and a +C++ compiler to be present on your system. If Emacs is not built with +the option '--with-be-app', the resulting Emacs will only run in +text-mode terminals. + +To enable Cairo support, ensure that the Cairo and FreeType +development files are present on your system, and configure Emacs with +'--with-be-cairo'. + +Unlike X, there is no compile-time option to enable or disable +double-buffering; it is always enabled. To disable it, change the +frame parameter 'inhibit-double-buffering' instead. + +--- +** Emacs now installs the ".pdmp" file using a unique fingerprint in the name. +The file is typically installed using a file name akin to +"...dir/libexec/emacs/29.1/x86_64-pc-linux-gnu/emacs-<fingerprint>.pdmp". +If a constant file name is required, the file can be renamed to +"emacs.pdmp", and Emacs will find it during startup anyway. + +--- +** Emacs on X now uses XInput 2 for input events. +If your X server has support and you have the XInput 2 development +headers installed, Emacs will use the X Input Extension for handling +input. If this causes problems, you can configure Emacs with the +option '--without-xinput2' to disable this support. + +'(featurep 'xinput2)' can be used to test for the presence of XInput 2 +support from Lisp programs. + ++++ +** Emacs now supports being built with pure GTK. +To use this option, make sure the GTK 3 (version 3.22.23 or later) and +Cairo development files are installed, and configure Emacs with the +option '--with-pgtk'. Unlike the default X and GTK build, the +resulting Emacs binary will work on any underlying window system +supported by GDK, such as Wayland and Broadway. We recommend that you +use this configuration only if you are running a window system other +than X that's supported by GDK. Running this configuration on X is +known to have problems, such as undesirable frame positioning and +various issues with keyboard input of sequences such as 'C-;' and +'C-S-u'. + +--- +** Emacs no longer reduces the size of the Japanese dictionary. +Building Emacs includes generation of a Japanese dictionary, which is +used by Japanese input methods. Previously, the build included a step +of reducing the size of this dictionary's vocabulary. This vocabulary +reduction is now optional, by default off. If you need the Emacs +build to include the vocabulary reduction, configure Emacs with the +option '--with-small-ja-dic'. In an Emacs source tree already +configured without that option, you can force the vocabulary reduction +by saying + + make -C leim generate-ja-dic JA_DIC_NO_REDUCTION_OPTION='' + +after deleting "lisp/leim/ja-dic/ja-dic.el". + +--- +** The docstrings of preloaded files are not in "etc/DOC" any more. +Instead, they're fetched as needed from the corresponding ".elc" +files, as was already the case for all the non-preloaded files. + + +* Startup Changes in Emacs 29.1 + ++++ +** '--batch' and '--script' now adjust the garbage collection levels. +These switches now set 'gc-cons-percentage' to 1.0 (up from the +default of 0.1). This means that batch processes will typically use +more memory than before, but use less time doing garbage collection. +Batch jobs that are supposed to run for a long time should adjust the +limit back down again. + ++++ +** Emacs can now be used more easily in an executable script. +If you start an executable script with + + #!/usr/bin/emacs -x + +Emacs will start without reading any init files (like with '--quick'), +and then execute the rest of the script file as Emacs Lisp. When it +reaches the end of the script, Emacs will exit with an exit code from +the value of the final form. + ++++ +** Emacs now supports setting 'user-emacs-directory' via '--init-directory'. +Use the '--init-directory' command-line option to set +'user-emacs-directory'. + ++++ +** Emacs now has a '--fingerprint' option. +This will output a string identifying the current Emacs build, and exit. + ++++ +** New hook 'after-pdump-load-hook'. +This is run at the end of the Emacs startup process, and is meant to +be used to reinitialize data structures that would normally be done at +load time. + +** Native Compilation + ++++ +*** New command 'native-compile-prune-cache'. +This command deletes old subdirectories of the eln cache (but not the +ones for the current Emacs version). Note that subdirectories of the +system directory where the "*.eln" files are installed (usually, the +last entry in 'native-comp-eln-load-path') are not deleted. + +--- +*** New function 'startup-redirect-eln-cache'. +This function can be called in your init files to change the +user-specific directory where Emacs stores the "*.eln" files produced +by native compilation of Lisp packages Emacs loads. The default +eln cache directory is unchanged: it is the "eln-cache" subdirectory +of 'user-emacs-directory'. + + +* Incompatible changes in Emacs 29.1 + ++++ +** The image commands have changed key bindings. +In previous Emacs versions, images have had the '+', '-' and 'r' keys +bound when point is over an image. In Emacs 29.1, additional commands +were added, and this made it more likely that users would trigger the +image commands by mistake. To avoid this, all image commands have +moved to the 'i' prefix keymap, so '+' is now 'i +', '-' is now 'i -', +and 'r' is now 'i r'. In addition, these commands are now repeating, +so, for example, you can rotate an image twice by typing 'i r r'. + ++++ +** Emacs now picks the correct coding-system for X input methods. +Previously, Emacs would use 'locale-coding-system' for input +methods, which could in some circumstances be incorrect, especially +when the input method chose to fall back to some other coding system. + +Emacs now automatically detects the coding-system used by input +methods, and uses that to decode input in preference to the value of +'locale-coding-system'. This unfortunately means that users who have +changed the coding system used to decode X keyboard input must adjust +their customizations to 'locale-coding-system' to the variable +'x-input-coding-system' instead. + ++++ +** Bookmarks no longer include context for encrypted files. +If you're visiting an encrypted file, setting a bookmark no longer +includes excerpts from that buffer in the bookmarks file. This is +implemented by the new hook 'bookmark-inhibit-context-functions', +where packages can register a function which returns non-nil for file +names to be excluded from adding such excerpts. + +--- +** 'show-paren-mode' is now disabled in 'special-mode' buffers. +In Emacs versions previous to Emacs 28.1, 'show-paren-mode' defaulted +off. In Emacs 28.1, the mode was switched on in all buffers. In +Emacs 29.1, this was changed to be switched on in all editing-related +buffers, but not in buffers that inherit from 'special-mode'. To go +back to how things worked in Emacs 28.1, put the following in your +init file: + + (setopt show-paren-predicate t) + ++++ +** Explicitly-set read-only state is preserved when reverting a buffer. +If you use the 'C-x C-q' command to change the read-only state of the +buffer and then revert it, Emacs would previously use the file +permission bits to determine whether the buffer should be read-only +after reverting the buffer. Emacs now remembers the decision made in +'C-x C-q'. + +--- +** The Gtk selection face is no longer used for the region. +The combination of a Gtk-controlled background and a foreground color +controlled by the internal Emacs machinery led to low-contrast faces +in common default setups. Emacs now uses the same 'region' face on +Gtk and non-Gtk setups. + +--- +** 'C-h f' and 'C-h x' may now require confirmation when you press 'RET'. +If the text in the minibuffer cannot be completed to a single function +or command, typing 'RET' will not automatically complete to the shortest +candidate, but will instead ask for confirmation. Typing 'TAB' will +complete as much as possible, and another 'TAB' will show all the +possible completions. This allows you to insist on the functions name +even if Help doesn't appear to know about it, by confirming with a +second 'RET'. + +** Dired + +--- +*** 'w' ('dired-copy-filename-as-kill') has changed behavior. +If there are several files marked, file names containing space and +quote characters will be quoted "like this". + +--- +*** The 'd' command now more consistently skips dot files. +In previous Emacs versions, commands like 'C-u 10 d' would put the "D" +mark on the next ten files, no matter whether they were dot files +(i.e., "." and "..") or not, while marking the next ten lines with the +mouse (in 'transient-mark-mode') and then hitting 'd' would skip dot +files. These now work equivalently. + ++++ +** Warning about "eager macro-expansion failure" is now an error. + +--- +** Previously, the X "reverseVideo" value at startup was heeded for all frames. +This meant that if you had a "reverseVideo" resource on the initial +display, and then opened up a new frame on a display without any +explicit "reverseVideo" setting, it would get heeded there, too. (This +included terminal frames.) In Emacs 29, the "reverseVideo" X resource +is handled like all the other X resources, and set on a per-frame basis. + ++++ +** 'E' in 'query-replace' now edits the replacement with exact case. +Previously, this command did the same as 'e'. + +--- +** '/ a' in "*Packages*" buffer now limits by archive name(s) instead of regexp. + ++++ +** Setting the goal columns now also affects '<prior>' and '<next>'. +Previously, 'C-x C-n' only affected 'next-line' and 'previous-line', +but it now also affects 'scroll-up-command' and 'scroll-down-command'. + +--- +** Isearch in "*Help*" and "*info*" now char-folds quote characters by default. +This means that you can say 'C-s `foo' (GRAVE ACCENT) if the buffer +contains "‘foo" (LEFT SINGLE QUOTATION MARK) and the like. These +quotation characters look somewhat similar in some fonts. To switch +this off, disable the new 'isearch-fold-quotes-mode' minor mode. + +--- +** Sorting commands no longer necessarily change modification status. +In earlier Emacs versions, commands like 'sort-lines' would always +change buffer modification status to "modified", whether they changed +something in the buffer or not. This has been changed: the buffer is +marked as modified only if the sorting ended up actually changing the +contents of the buffer. + +--- +** 'string-lines' handles trailing newlines differently. +It no longer returns an empty final string if the string ends with a +newline. + +--- +** 'TAB' and '<backtab>' are now bound in 'button-map'. +This means that if point is on a button, 'TAB' will take you to the +next button, even if the mode has bound it to something else. This +also means that 'TAB' on a button in an 'outline-minor-mode' heading +will move point instead of collapsing the outline. + +--- +** 'outline-minor-mode-cycle-map' is now parent of 'outline-minor-mode'. +Instead of adding text property 'keymap' with 'outline-minor-mode-cycle' +on outline headings in 'outline-minor-mode', the keymap +'outline-minor-mode-cycle' is now active in the whole buffer. +But keybindings in 'outline-minor-mode-cycle' still take effect +only on outline headings because they are bound with the help of +'outline-minor-mode-cycle--bind' that checks if point is on a heading. + +--- +** 'Info-default-directory-list' is no longer populated at Emacs startup. +If you have code in your init file that removes directories from +'Info-default-directory-list', this will no longer work. + +--- +** 'C-k' no longer deletes files in 'ido-mode'. +To get the previous action back, put something like the following in +your Init file: + + (require 'ido) + (keymap-set ido-file-completion-map "C-k" #'ido-delete-file-at-head) + +--- +** New user option 'term-clear-full-screen-programs'. +By default, term.el will now work like most terminals when displaying +full-screen programs: When they exit, the output is cleared, leaving +what was displayed in the window before the programs started. Set +this user option to nil to revert back to the old behavior. + +--- +** Support for old EIEIO functions is not autoloaded any more. +You need an explicit '(require 'eieio-compat)' to use 'defmethod' +and 'defgeneric' (which have been made obsolete in Emacs 25.1 with +'cl-defmethod' and 'cl-defgeneric'). +Similarly you might need to '(require 'eieio-compat)' before loading +files that were compiled with an old EIEIO (Emacs<25). + +--- +** 'C-x 8 .' has been moved to 'C-x 8 . .'. +This is to open up the 'C-x 8 .' map to bind further characters there. + +--- +** 'C-x 8 =' has been moved to 'C-x 8 = ='. +You can now use 'C-x 8 =' to insert several characters with macron; +for example, 'C-x 8 = a' will insert U+0101 LATIN SMALL LETTER A WITH +MACRON. To insert a lone macron, type 'C-x 8 = =' instead of the +previous 'C-x ='. + +** Eshell + +*** Eshell's PATH is now derived from 'exec-path'. +For consistency with remote connections, Eshell now uses 'exec-path' +to determine the execution path on the local or remote system, instead +of using the PATH environment variable directly. + +--- +*** 'source' and '.' no longer accept the '--help' option. +This is for compatibility with the shell versions of these commands, +which don't handle options like '--help' in any special way. + ++++ +*** String delimiters in argument predicates/modifiers are more restricted. +Previously, some argument predicates/modifiers allowed arbitrary +characters as string delimiters. To provide more unified behavior +across all predicates/modifiers, the list of allowed delimiters has +been restricted to "...", '...', /.../, |...|, (...), [...], <...>, +and {...}. See the "(eshell) Argument Predication and Modification" +node in the Eshell manual for more details. + ++++ +*** Eshell pipelines now only pipe stdout by default. +To pipe both stdout and stderr, use the '|&' operator instead of '|'. + +--- +** The 'delete-forward-char' command now deletes by grapheme clusters. +This command is by default bound to the '<Delete>' function key +(a.k.a. '<deletechar>'). When invoked without a prefix argument or +with a positive prefix numeric argument, the command will now delete +complete grapheme clusters produced by character composition. For +example, if point is before an Emoji sequence, pressing '<Delete>' +will delete the entire sequence, not just a single character at its +beginning. + ++++ +** 'load-history' does not treat autoloads specially any more. +An autoload definition appears just as a '(defun . NAME)' and the +'(t . NAME)' entries are not generated any more. + +--- +** The Tamil input methods no longer insert Tamil digits. +The input methods 'tamil-itrans' and 'tamil-inscript' no longer insert +the Tamil digits, as those digit characters are not used nowadays by +speakers of the Tamil language. To get back the previous behavior, +use the new 'tamil-itrans-digits' and 'tamil-inscript-digits' input +methods instead. + ++++ +** New variable 'current-time-list' governing default timestamp form. +Functions like 'current-time' now yield '(TICKS . HZ)' timestamps if +this new variable is nil. The variable defaults to t, which means +these functions default to timestamps of the forms '(HI LO US PS)', +'(HI LO US)' or '(HI LO)', which are less regular and less efficient. +This is part of a long-planned change first documented in Emacs 27. +Developers are encouraged to test timestamp-related code with this +variable set to nil, as it will default to nil in a future Emacs +version and will be removed some time after that. + ++++ +** Functions that recreate the "*scratch*" buffer now also initialize it. +When functions like 'other-buffer' and 'server-execute' recreate +"*scratch*", they now also insert 'initial-scratch-message' and set +the major mode according to 'initial-major-mode', like at Emacs +startup. Previously, these functions ignored +'initial-scratch-message' and left "*scratch*" in 'fundamental-mode'. + +--- +** Naming of Image-Dired thumbnail files has changed. +Names of thumbnail files generated when 'image-dired-thumbnail-storage' +is 'image-dired' now always end in ".jpg". This fixes various issues +on different platforms, but means that thumbnails generated in Emacs 28 +will not be used in Emacs 29, and vice-versa. If disk space is an +issue, consider deleting the 'image-dired-dir' directory (usually +"~/.emacs.d/image-dired/") after upgrading to Emacs 29. + +--- +** The 'rlogin' method in the URL library is now obsolete. +Emacs will now display a warning if you request a URL like +"rlogin://foo@example.org". + +--- +** Setting 'url-gateway-method' to 'rlogin' is now obsolete. +Emacs will now display a warning when setting it to that value. +The user options 'url-gateway-rlogin-host', +'url-gateway-rlogin-parameters', and 'url-gateway-rlogin-user-name' +are also obsolete. + +--- +** The user function 'url-irc-function' now takes a SCHEME argument. +The user option 'url-irc-function' is now called with a sixth argument +corresponding to the scheme portion of the target URL. For example, +this would be "ircs" for a URL like "ircs://irc.libera.chat". + +--- +** The linum.el library is now obsolete. +We recommend using either the built-in 'display-line-numbers-mode', or +the 'nlinum' package from GNU ELPA instead. The former has better +performance, but the latter is closer to a drop-in replacement. + +1. To use 'display-line-numbers-mode', add something like this to your + Init file: + + (global-display-line-numbers-mode 1) + ;; Alternatively, to use it only in programming modes: + (add-hook 'prog-mode-hook #'display-line-numbers-mode) + +2. To use 'nlinum', add this to your Init file: + + (package-install 'nlinum) + (global-nlinum-mode 1) + ;; Alternatively, to use it only in programming modes: + (add-hook 'prog-mode-hook #'nlinum-mode) + +3. To continue using the obsolete package 'linum', add this line to + your Init file, in addition to any existing customizations: + + (require 'linum) + +--- +** The thumbs.el library is now obsolete. +We recommend using command 'image-dired' instead. + +--- +** The autoarg.el library is now marked obsolete. +This library provides the 'autoarg-mode' and 'autoarg-kp-mode' minor +modes to emulate the behavior of the historical editor Twenex Emacs. +We believe it is no longer useful. + +--- +** The quickurl.el library is now obsolete. +Use 'abbrev', 'skeleton' or 'tempo' instead. + +--- +** The rlogin.el library, and the 'rsh' command are now obsolete. +Use something like 'M-x shell RET ssh <host> RET' instead. + +--- +** The url-about.el library is now obsolete. + +--- +** The autoload.el library is now obsolete. +It is superseded by the new loaddefs-gen.el library. + +--- +** The netrc.el library is now obsolete. +Use the 'auth-source-netrc-parse-all' function in auth-source.el +instead. + +--- +** The url-dired.el library is now obsolete. + +--- +** The fast-lock.el and lazy-lock.el libraries have been removed. +They have been obsolete since Emacs 22.1. + +The variable 'font-lock-support-mode' is occasionally useful for +debugging purposes. It is now a regular variable (instead of a user +option) and can be set to nil to disable Just-in-time Lock mode. + ++++ +** The 'utf-8-auto' coding-system now produces BOM on encoding. +This is actually a bugfix, since this is how 'utf-8-auto' was +documented from day one; it just didn't behave according to +documentation. It turns out some Lisp programs were using this +coding-system on the wrong assumption that the "auto" part means some +automagic handling of the end-of-line (EOL) format conversion; those +programs will now start to fail, because BOM signature in UTF-8 encoded +text is rarely expected. That is the reason we mention this bugfix +here. + +In general, this coding-system should probably never be used for +encoding, only for decoding. + + +* Changes in Emacs 29.1 + ++++ +** New user option 'major-mode-remap-alist' to specify favorite major modes. +This user option lets you remap the default modes (e.g. 'perl-mode' or +'latex-mode') to your favorite ones (e.g. 'cperl-mode' or +'LaTeX-mode') without having to use 'defalias', which can have +undesirable side effects. +This applies to all modes specified via 'auto-mode-alist', file-local +variables, etc. + +--- +** Emacs now supports Unicode Standard version 15.0. + +--- +** New user option 'electric-quote-replace-consecutive'. + +--- +** Emacs is now capable of editing files with very long lines. +The display of long lines has been optimized, and Emacs should no +longer choke when a buffer on display contains long lines. The +variable 'long-line-threshold' controls whether and when these display +optimizations are in effect. + +A companion variable 'large-hscroll-threshold' controls when another +set of display optimizations are in effect, which are aimed +specifically at speeding up display of long lines that are truncated +on display. + +If you still experience slowdowns while editing files with long lines, +this may be due to line truncation, or to one of the enabled minor +modes, or to the current major mode. Try turning off line truncation +with 'C-x x t', or try disabling all known slow minor modes with +'M-x so-long-minor-mode', or try disabling both known slow minor modes +and the major mode with 'M-x so-long-mode', or visit the file with +'M-x find-file-literally' instead of the usual 'C-x C-f'. + +In buffers in which these display optimizations are in effect, the +'fontification-functions', 'pre-command-hook' and 'post-command-hook' +hooks are executed on a narrowed portion of the buffer, whose size is +controlled by the variables 'long-line-optimizations-region-size' and +'long-line-optimizations-bol-search-limit', as if they were in a +'with-restriction' form. This may, in particular, cause occasional +mis-fontifications in these buffers. Modes which are affected by +these optimizations and by the fact that the buffer is narrowed, +should adapt and either modify their algorithm so as not to expect the +entire buffer to be accessible, or, if accessing outside of the +narrowed region doesn't hurt performance, use the +'without-restriction' form to temporarily lift the restriction and +access portions of the buffer outside of the narrowed region. + +The new function 'long-line-optimizations-p' returns non-nil when +these optimizations are in effect in the current buffer. + ++++ +** New command to change the font size globally. +To increase the font size, type 'C-x C-M-+' or 'C-x C-M-='; to +decrease it, type 'C-x C-M--'; to restore the font size, type 'C-x +C-M-0'. The final key in these commands may be repeated without the +leading 'C-x' and without the modifiers, e.g. 'C-x C-M-+ C-M-+ C-M-+' +and 'C-x C-M-+ + +' increase the font size by three steps. When +'mouse-wheel-mode' is enabled, 'C-M-wheel-up' and 'C-M-wheel-down' also +increase and decrease the font size globally. Additionally, the +user option 'global-text-scale-adjust-resizes-frames' controls whether +the frames are resized when the font size is changed. + +--- +** New config variable 'syntax-wholeline-max' to reduce the cost of long lines. +This variable is used by some operations (mostly syntax-propertization +and font-locking) to treat lines longer than this variable as if they +were made up of various smaller lines. This can help reduce the +slowdowns seen in buffers made of a single long line, but can also +cause misbehavior in the presence of such long lines (though most of +that misbehavior should usually be limited to mis-highlighting). You +can recover the previous behavior with: + + (setq syntax-wholeline-max most-positive-fixnum) + +--- +** New bindings in 'find-function-setup-keys' for 'find-library'. +When 'find-function-setup-keys' is enabled, 'C-x L' is now bound to +'find-library', 'C-x 4 L' is now bound to 'find-library-other-window' +and 'C-x 5 L' is now bound to 'find-library-other-frame'. + ++++ +** New key binding after 'M-x' or 'M-X': 'M-X'. +Emacs allows different completion predicates to be used with 'M-x' +(i.e., 'execute-extended-command') via the +'read-extended-command-predicate' user option. Emacs also has the +'M-X' (note upper case X) command, which only displays commands +especially relevant to the current buffer. Emacs now allows toggling +between these modes while the user is inputting a command by hitting +'M-X' while in the minibuffer. + +--- +** Interactively, 'kill-buffer' will now offer to save the buffer if unsaved. + +--- +** New commands 'duplicate-line' and 'duplicate-dwim'. +'duplicate-line' duplicates the current line the specified number of times. +'duplicate-dwim' duplicates the region if it is active. If not, it +works like 'duplicate-line'. An active rectangular region is +duplicated on its right-hand side. + +--- +** Files with the ".eld" extension are now visited in 'lisp-data-mode'. + ++++ +** 'network-lookup-address-info' can now check numeric IP address validity. +Specifying 'numeric' as the new optional HINTS argument makes it +check if the passed address is a valid IPv4/IPv6 address (without DNS +traffic). + + (network-lookup-address-info "127.1" 'ipv4 'numeric) + => ([127 0 0 1 0]) + ++++ +** New command 'find-sibling-file'. +This command jumps to a file considered a "sibling file", which is +determined according to the new user option 'find-sibling-rules'. + ++++ +** New user option 'delete-selection-temporary-region'. +When non-nil, 'delete-selection-mode' will only delete the temporary +regions (usually set by mouse-dragging or shift-selection). + ++++ +** New user option 'switch-to-prev-buffer-skip-regexp'. +This should be a regexp or a list of regexps; buffers whose names +match those regexps will be ignored by 'switch-to-prev-buffer' and +'switch-to-next-buffer'. + ++++ +** New command 'rename-visited-file'. +This command renames the file visited by the current buffer by moving +it to a new name or location, and also makes the buffer visit this new +file. + +** Menus + +--- +*** The entries following the buffers in the "Buffers" menu can now be altered. +Change the 'menu-bar-buffers-menu-command-entries' variable to alter +the entries that follow the buffer list. + +--- +** 'delete-process' is now a command. +When called interactively, it will kill the process running in the +current buffer (if any). This can be useful if you have runaway +output in the current buffer (from a process or a network connection), +and want to stop it. + ++++ +** New command 'restart-emacs'. +This is like 'save-buffers-kill-emacs', but instead of just killing +the current Emacs process at the end, it starts a new Emacs process +(using the same command line arguments as the running Emacs process). +'kill-emacs' and 'save-buffers-kill-emacs' have also gained new +optional arguments to restart instead of just killing the current +process. + +** Drag and Drop + ++++ +*** New user option 'mouse-drag-mode-line-buffer'. +If non-nil, dragging on the buffer name part of the mode-line will +drag the buffer's associated file to other programs. This option is +currently only available on X, Haiku and Nextstep (GNUstep or macOS). + ++++ +*** New user option 'mouse-drag-and-drop-region-cross-program'. +If non-nil, this option allows dragging text in the region from Emacs +to another program. + +--- +*** New user option 'mouse-drag-and-drop-region-scroll-margin'. +If non-nil, this option allows scrolling a window while dragging text +around without a scroll wheel. + ++++ +*** The value of 'mouse-drag-copy-region' can now be the symbol 'non-empty'. +This prevents mouse drag gestures from putting empty strings onto the +kill ring. + ++++ +*** New user options 'dnd-indicate-insertion-point' and 'dnd-scroll-margin'. +These options allow adjusting point and scrolling a window when +dragging items from another program. + ++++ +*** The X Direct Save (XDS) protocol is now supported. +This means dropping an image or file link from programs such as +Firefox will no longer create a temporary file in a random directory, +instead asking you where to save the file first. + ++++ +** New user option 'record-all-keys'. +If non-nil, this option will force recording of all input keys, +including those typed in response to passwords prompt (this was the +previous behavior). The default is nil, which inhibits recording of +passwords. + ++++ +** New function 'command-query'. +This function makes its argument command prompt the user for +confirmation before executing. + ++++ +** The 'disabled' property of a command's symbol can now be a list. +The first element of the list should be the symbol 'query', which will +cause the command disabled this way prompt the user with a y/n or a +yes/no question before executing. The new function 'command-query' is +a convenient method of making commands disabled in this way. + +--- +** 'count-words' will now report buffer totals if given a prefix. +Without a prefix, it will only report the word count for the narrowed +part of the buffer. + ++++ +** 'count-words' will now report sentence count when used interactively. + ++++ +** New user option 'set-message-functions'. +It allows more flexible control of how echo-area messages are displayed +by adding functions to this list. The default value is a list of one +element: 'set-minibuffer-message', which displays echo-area messages +at the end of the minibuffer text when the minibuffer is active. +Other useful functions include 'inhibit-message', which allows +specifying, via 'inhibit-message-regexps', the list of messages whose +display shall be inhibited; and 'set-multi-message' that accumulates +recent messages and displays them stacked together. + +--- +** New user option 'find-library-include-other-files'. +If set to nil, commands like 'find-library' will only include library +files in the completion candidates. The default is t, which preserves +previous behavior, whereby non-library files could also be included. + ++++ +** New command 'sqlite-mode-open-file' for examining an sqlite3 file. +This uses the new 'sqlite-mode' which allows listing the tables in a +DB file, and examining and modifying the columns and the contents of +those tables. + +--- +** 'write-file' will now copy some file mode bits. +If the current buffer is visiting a file that is executable, the +'C-x C-w' command will now make the new file executable, too. + ++++ +** New user option 'process-error-pause-time'. +This determines how long to pause Emacs after a process +filter/sentinel error has been handled. + ++++ +** New faces for font-lock. +These faces are primarily meant for use with tree-sitter. They are: +'font-lock-bracket-face', 'font-lock-delimiter-face', +'font-lock-escape-face', 'font-lock-function-call-face', +'font-lock-misc-punctuation-face', 'font-lock-number-face', +'font-lock-operator-face', 'font-lock-property-name-face', +'font-lock-property-use-face', 'font-lock-punctuation-face', +'font-lock-regexp-face', and 'font-lock-variable-use-face'. + ++++ +** New face 'variable-pitch-text'. +This face is like 'variable-pitch' (from which it inherits), but is +slightly larger, which should help with the visual size differences +between the default, non-proportional font and proportional fonts when +mixed. + ++++ +** New face 'mode-line-active'. +This inherits from the 'mode-line' face, but is the face actually used +on the mode lines (along with 'mode-line-inactive'). + ++++ +** New face attribute pseudo-value 'reset'. +This value stands for the value of the corresponding attribute of the +'default' face. It can be used to reset attribute values produced by +inheriting from other faces. + ++++ +** New X resource: "borderThickness". +This controls the thickness of the external borders of the menu bars +and pop-up menus. + ++++ +** New X resource: "inputStyle". +This controls the style of the pre-edit and status areas of X input +methods. + ++++ +** New X resources: "highlightForeground" and "highlightBackground". +Only in the Lucid build, this controls colors used for highlighted +menu item widgets. + ++++ +** On X, Emacs now tries to synchronize window resize with the window manager. +This leads to less flicker and empty areas of a frame being displayed +when a frame is being resized. Unfortunately, it does not work on +some ancient buggy window managers, so if Emacs appears to freeze, but +is still responsive to input, you can turn it off by setting the X +resource "synchronizeResize" to "off". + ++++ +** On X, Emacs can optionally synchronize display with the graphics hardware. +When this is enabled by setting the X resource "synchronizeResize" to +"extended", frame content "tearing" is drastically reduced. This is +only supported on the Motif, Lucid, and no-toolkit builds, and +requires an X compositing manager supporting the extended frame +synchronization protocol (see +https://fishsoup.net/misc/wm-spec-synchronization.html). + +This behavior can be toggled on and off via the frame parameter +'use-frame-synchronization'. + ++++ +** New frame parameter 'alpha-background' and X resource "alphaBackground". +This controls the opacity of the text background when running on a +composited display. + ++++ +** New frame parameter 'shaded'. +With window managers which support this, it controls whether or not a +frame's contents will be hidden, leaving only the title bar on display. + +--- +** New user option 'x-gtk-use-native-input'. +This controls whether or not GTK input methods are used by Emacs, +instead of XIM input methods. + ++++ +** New user option 'use-system-tooltips'. +This controls whether to use the toolkit tooltips, or Emacs's own +native implementation of tooltips as small frames. This option is +only meaningful if Emacs was built with GTK+, Nextstep, or Haiku +support, and defaults to t, which makes Emacs use the toolkit +tooltips. The existing GTK-specific option +'x-gtk-use-system-tooltips' is now an alias of this new option. + ++++ +** Non-native tooltips are now supported on Nextstep. +This means Emacs built with GNUstep or built on macOS is now able to +display different faces and images inside tooltips when the +'use-system-tooltips' user option is nil. + +--- +** New minor mode 'pixel-scroll-precision-mode'. +When enabled, and if your mouse supports it, you can scroll the +display up or down at pixel resolution, according to what your mouse +wheel reports. Unlike 'pixel-scroll-mode', this mode scrolls the +display pixel-by-pixel, as opposed to only animating line-by-line +scrolls. + +** Terminal Emacs + +--- +*** Emacs will now use 24-bit colors on terminals that support "Tc" capability. +This is in addition to previously-supported ways of discovering 24-bit +color support: either via the "RGB" or "setf24" capabilities, or if +the 'COLORTERM' environment variable is set to the value "truecolor". + +--- +*** Select active regions with xterm selection support. +On terminals with xterm "setSelection" support, the active region may be +saved to the X primary selection, following the +'select-active-regions' variable. This support is enabled when +'tty-select-active-regions' is non-nil. + +--- +*** New command to set up display of unsupported characters. +The new command 'standard-display-by-replacement-char' produces Lisp +code that sets up the 'standard-display-table' to use a replacement +character for display of characters that the text-mode terminal +doesn't support. This code is intended to be used in your init files. +This feature is most useful with the Linux console and similar +terminals, where Emacs has a reliable way of determining which +characters have glyphs in the font loaded into the terminal's memory. + +--- +*** New functions to set terminal output buffer size. +The new functions 'tty--set-output-buffer-size' and +'tty--output-buffer-size' allow setting and retrieving the output +buffer size of a terminal device. The default buffer size is and has +always been BUFSIZ, which is defined in your system's stdio.h. When +you set a buffer size with 'tty--set-output-buffer-size', this also +prevents Emacs from explicitly flushing the tty output stream, except +at the end of display update. + +** ERT + ++++ +*** New ERT variables 'ert-batch-print-length' and 'ert-batch-print-level'. +These variables will override 'print-length' and 'print-level' when +printing Lisp values in ERT batch test results. + +--- +*** Redefining an ERT test in batch mode now signals an error. +Executing 'ert-deftest' with the same name as an existing test causes +the previous definition to be discarded, which was probably not +intended when this occurs in batch mode. To remedy the error, rename +tests so that they all have unique names. + ++++ +*** ERT can generate JUnit test reports. +When environment variable 'EMACS_TEST_JUNIT_REPORT' is set, ERT +generates a JUnit test report under this file name. This is useful +for Emacs integration into CI/CD test environments. + +--- +*** Unbound test symbols now signal an 'ert-test-unbound' error. +This affects the 'ert-select-tests' function and its callers. + +** Emoji + ++++ +*** Emacs now has several new methods for inserting Emoji. +The Emoji commands are under the new 'C-x 8 e' prefix. + ++++ +*** New command 'emoji-insert' (bound to 'C-x 8 e e' and 'C-x 8 e i'). +This command guides you through various Emoji categories and +combinations in a graphical menu system. + ++++ +*** New command 'emoji-search' (bound to 'C-x 8 e s'). +This command lets you search for Emoji based on names. + ++++ +*** New command 'emoji-list' (bound to 'C-x 8 e l'). +This command lists all Emoji (categorized by themes) in a special +buffer and lets you choose one of them. + +--- +*** New command 'emoji-recent' (bound to 'C-x 8 e r'). +This command lets you choose among the Emoji you have recently +inserted. + ++++ +*** New command 'emoji-describe' (bound to 'C-x 8 e d'). +This command will tell you the name of the Emoji at point. (It also +works for non-Emoji characters.) + +--- +*** New commands 'emoji-zoom-increase' and 'emoji-zoom-decrease'. +These are bound to 'C-x 8 e +' and 'C-x 8 e -', respectively. They +can be used on any character, but are mainly useful for Emoji. + +--- +*** New command 'emoji-zoom-reset'. +This is bound to 'C-x 8 e 0', and undoes any size changes performed by +'emoji-zoom-increase' and 'emoji-zoom-decrease'. + +--- +*** New input method 'emoji'. +This allows you to enter Emoji using short strings, eg ':face_palm:' +or ':scream:'. + +** Help + +--- +*** Variable values displayed by 'C-h v' in "*Help*" are now fontified. + ++++ +*** New user option 'help-clean-buttons'. +If non-nil, link buttons in "*Help*" buffers will have any surrounding +quotes removed. + +--- +*** 'M-x apropos-variable' output now includes values of variables. +Such apropos buffer is more easily viewed with outlining after +enabling 'outline-minor-mode' in 'apropos-mode'. + ++++ +*** New docstring syntax to indicate that symbols shouldn't be links. +When displaying docstrings in "*Help*" buffers, strings that are +"`like-this'" are made into links (if they point to a bound +function/variable). This can lead to false positives when talking +about values that are symbols that happen to have the same names as +functions/variables. To inhibit this buttonification, use the new +"\\+`like-this'" syntax. + ++++ +*** New user option 'help-window-keep-selected'. +If non-nil, commands to show the info manual and the source will reuse +the same window in which the "*Help*" buffer is shown. + +--- +*** Commands like 'C-h f' have changed how they describe menu bindings. +For instance, previously a command might be described as having the +following bindings: + + It is bound to <open>, C-x C-f, <menu-bar> <file> <new-file>. + +This has been changed to: + + It is bound to <open> and C-x C-f. + It can also be invoked from the menu: File → Visit New File... + ++++ +*** The 'C-h .' command now accepts a prefix argument. +'C-u C-h .' would previously inhibit displaying a warning message if +there's no local help at point. This has been changed to call +'button-describe'/'widget-describe' and display button/widget help +instead. + +--- +*** New user option 'help-enable-variable-value-editing'. +If enabled, 'e' on a value in "*Help*" will pop you to a new buffer +where you can edit the value. This is not enabled by default, because +it is easy to make an edit that yields an invalid result. + +--- +*** 'C-h b' uses outlining by default. +Set 'describe-bindings-outline' to nil to get back the old behavior. + +--- +*** Jumping to function/variable source now saves mark before moving point. +Jumping to source from a "*Help*" buffer moves point when the source +buffer is already open. Now, the old point is pushed onto mark ring. + ++++ +*** New key bindings in "*Help*" buffers: 'n' and 'p'. +These will take you (respectively) to the next and previous "page". + +--- +*** 'describe-char' now also outputs the name of Emoji sequences. + ++++ +*** New key binding in "*Help*" buffer: 'I'. +This will take you to the Emacs Lisp manual entry for the item +displayed, if any. + +--- +*** The 'C-h m' ('describe-mode') "*Help*" buffer has been reformatted. +It now only includes local minor modes at the start, and the global +minor modes are listed after the major mode. + ++++ +*** The user option 'help-window-select' now affects apropos commands. +The apropos commands will now select the apropos window if +'help-window-select' is non-nil. + +--- +*** 'describe-keymap' now considers the symbol at point. +If the symbol at point is a keymap, 'describe-keymap' suggests it as +the default candidate. + +--- +*** New command 'help-quick' displays an overview of common commands. +The command pops up a buffer at the bottom of the screen with a few +helpful commands for various tasks. You can toggle the display using +'C-h C-q'. + +** Emacs now comes with Org v9.6. +See the file "ORG-NEWS" for user-visible changes in Org. + +** Outline Mode + ++++ +*** Support for customizing the default visibility state of headings. +Customize the user option 'outline-default-state' to define what +headings will be visible initially, after Outline mode is turned on. +When the value is a number, the user option 'outline-default-rules' +determines the visibility of the subtree starting at the corresponding +level. Values are provided to control showing a heading subtree +depending on whether the heading matches a regexp, or on whether its +subtree has long lines or is itself too long. + +** Outline Minor Mode + ++++ +*** New user option 'outline-minor-mode-use-buttons'. +If non-nil, Outline Minor Mode will use buttons to hide/show outlines +in addition to the ellipsis. The default is nil, but in 'help-mode' +it has the value 'insert' that inserts the buttons directly into the +buffer, and you can use 'RET' to cycle outline visibility. When +the value is 'in-margins', Outline Minor Mode uses the window margins +for buttons that hide/show outlines. + ++++ +*** Buttons and headings now have their own keymaps. +'outline-button-icon-map', 'outline-overlay-button-map', and +'outline-inserted-button-map' are now available as defined keymaps +instead of being anonymous keymaps. + +** Windows + ++++ +*** New commands 'split-root-window-below' and 'split-root-window-right'. +These commands split the root window in two, and are bound to 'C-x w 2' +and 'C-x w 3', respectively. A number of other useful window-related +commands are now available with key sequences that start with the +'C-x w' prefix. + ++++ +*** New display action 'display-buffer-full-frame'. +This action removes other windows from the frame when displaying a +buffer on that frame. + ++++ +*** 'display-buffer' now can set up the body size of the chosen window. +For example, a 'display-buffer-alist' entry of + + (window-width . (body-columns . 40)) + +will make the body of the chosen window 40 columns wide. For the +height use 'window-height' and 'body-lines', respectively. + ++++ +*** 'display-buffer' provides more options for using an existing window. +The display buffer action functions 'display-buffer-use-some-window' and +'display-buffer-use-least-recent-window' now honor the action alist +entry 'window-min-height' as well as the entries listed below to make +the display of several buffers in a row more amenable. + ++++ +*** New buffer display action alist entry 'lru-frames'. +This allows to specify which frames 'display-buffer' should consider +when using a window that shows another buffer. + ++++ +*** New buffer display action alist entry 'lru-time'. +'display-buffer' will ignore windows with a use time higher than that +when using a window that shows another buffer. + ++++ +*** New buffer display action alist entry 'bump-use-time'. +This has 'display-buffer' bump the use time of any window it returns, +making it a less likely candidate for displaying another buffer. + ++++ +*** New buffer display action alist entry 'window-min-width'. +This allows to specify a minimum width of the window used to display a +buffer. + +--- +*** You can customize on which window 'scroll-other-window' operates. +This is controlled by the new 'other-window-scroll-default' variable. + +** Frames + ++++ +*** Deleted frames can now be undeleted. +The 16 most recently deleted frames can be undeleted with 'C-x 5 u' when +'undelete-frame-mode' is enabled. Without a prefix argument, undelete +the most recently deleted frame. With a numerical prefix argument +between 1 and 16, where 1 is the most recently deleted frame, undelete +the corresponding deleted frame. + ++++ +*** The variable 'icon-title-format' can now have the value t. +That value means to use 'frame-title-format' for iconified frames. +This is useful with some window managers and desktop environments +which treat changes in frame's title as requests to raise the frame +and/or give it input focus, or if you want the frame's title to be the +same no matter if the frame is iconified or not. + +** Tab Bars and Tab Lines + +--- +*** New user option 'tab-bar-auto-width' to automatically determine tab width. +This option is non-nil by default, which resizes tab-bar tabs so that +their width is evenly distributed across the tab bar. A companion +option 'tab-bar-auto-width-max' controls the maximum width of a tab +before its name on display is truncated. + +--- +*** 'C-x t RET' creates a new tab when the provided tab name doesn't exist. +It prompts for the name of a tab and switches to it, creating a new +tab if no tab exists by that name. + +--- +*** New keymap 'tab-bar-history-mode-map'. +By default, it contains 'C-c <left>' and 'C-c <right>' to browse +the history of tab window configurations back and forward. + +--- +** Better detection of text suspiciously reordered on display. +The function 'bidi-find-overridden-directionality' has been extended +to detect reordering effects produced by embeddings and isolates +(started by directional formatting control characters such as RLO and +LRI). The new command 'highlight-confusing-reorderings' finds and +highlights segments of buffer text whose reordering for display is +suspicious and could be malicious. + +** Emacs Server and Client + ++++ +*** New command-line option '-r'/'--reuse-frame' for emacsclient. +With this command-line option, Emacs reuses an existing graphical client +frame if one exists; otherwise it creates a new frame. + ++++ +*** New command-line option '-w N'/'--timeout=N' for emacsclient. +With this command-line option, emacsclient will exit if Emacs does not +respond within N seconds. The default is to wait forever. + ++++ +*** 'server-stop-automatically' can be used to automatically stop the server. +The Emacs server will be automatically stopped when certain conditions +are met. The conditions are given by the argument, which can be +'empty', 'delete-frame' or 'kill-terminal'. + +** Rcirc + ++++ +*** New command 'rcirc-when'. + ++++ +*** New user option 'rcirc-cycle-completion-flag'. +Rcirc will use the default 'completion-at-point' mechanism. The +conventional IRC behavior of completing by cycling through the +available options can be restored by enabling this option. + ++++ +*** New user option 'rcirc-bridge-bot-alist'. +If you are in a channel where a bot is responsible for bridging +between networks, you can use this variable to make these messages +appear more native. For example, you might set the option to: + + (setopt rcirc-bridge-bot-alist '(("bridge" . "{\\(.+?\\)}[[:space:]]+"))) + +for messages like + + 09:47 <bridge> {john} I am not on IRC + +to be reformatted into + + 09:47 <john> I am not on IRC + +--- +*** New formatting commands. +Most IRC clients (including rcirc) support basic formatting using +control codes. Under the 'C-c C-f' prefix a few commands have been +added to insert these automatically. For example, if a region is +active and 'C-c C-f C-b' is invoked, markup is inserted for the region +to be highlighted in bold. + +** Imenu + ++++ +*** 'imenu' is now bound to 'M-g i' globally. + +--- +*** New function 'imenu-flush-cache'. +Use it if you want Imenu to forget the buffer's index alist and +recreate it anew next time 'imenu' is invoked. + +--- +** Emacs is now capable of abandoning a window's redisplay that takes too long. +This is controlled by the new variable 'max-redisplay-ticks'. If that +variable is set to a non-zero value, display of a window will be +aborted after that many low-level redisplay operations, thus +preventing Emacs from becoming wedged when visiting files with very +long lines. The default is zero, which disables the feature: Emacs +will wait forever for redisplay to finish. (We believe you won't need +this feature, given the ability to display buffers with very long +lines.) + + +* Editing Changes in Emacs 29.1 + ++++ +** 'M-SPC' is now bound to 'cycle-spacing'. +Formerly it invoked 'just-one-space'. The actions performed by +'cycle-spacing' and their order can now be customized via the user +option 'cycle-spacing-actions'. + +--- +** 'zap-to-char' and 'zap-up-to-char' are case-sensitive for upper-case chars. +These commands now behave as case-sensitive for interactive calls when +they are invoked with an uppercase character, regardless of the value +of 'case-fold-search'. + +--- +** 'scroll-other-window' and 'scroll-other-window-down' now respect remapping. +These commands (bound to 'C-M-v' and 'C-M-V') used to scroll the other +windows without looking at customizations in that other window. These +functions now check whether they have been rebound in the buffer shown +in that other window, and then call the remapped function instead. In +addition, these commands now also respect the +'scroll-error-top-bottom' user option. + +--- +** Indentation of 'cl-flet' and 'cl-labels' has changed. +These forms now indent like this: + + (cl-flet ((bla (x) + (* x x))) + (bla 42)) + +This change also affects 'cl-macrolet', 'cl-flet*' and +'cl-symbol-macrolet'. + ++++ +** New user option 'translate-upper-case-key-bindings'. +Set this option to nil to inhibit the default translation of upper +case keys to their lower case variants. + ++++ +** New command 'ensure-empty-lines'. +This command increases (or decreases) the number of empty lines before +point. + +--- +** Improved mouse behavior with auto-scrolling modes. +When clicking inside the 'scroll-margin' or 'hscroll-margin' region, +point is now moved only when releasing the mouse button. This no +longer results in a bogus selection, unless the mouse has also been +dragged. + ++++ +** 'kill-ring-max' now defaults to 120. + +--- +** New user option 'yank-menu-max-items'. +Customize this option to limit the number of entries in the menu +"Edit → Paste from Kill Menu". The default is 60. + +--- +** New user option 'copy-region-blink-predicate'. +By default, when copying a region with 'kill-ring-save', Emacs only +blinks point and mark when the region is not denoted visually, that +is, when either the region is inactive, or the 'region' face is +indistinguishable from the 'default' face. + +Users who would rather enable blinking unconditionally can now set +this user option to 'always'. To disable blinking unconditionally, +either set this option to 'ignore', or set 'copy-region-blink-delay' +to 0. + ++++ +** Performing a pinch gesture on a touchpad now increases the text scale. + +** Show Paren Mode + ++++ +*** New user option 'show-paren-context-when-offscreen'. +When non-nil, if the point is in a closing delimiter and the opening +delimiter is offscreen, shows some context around the opening +delimiter in the echo area. The default is nil. + +This option can also be set to the symbols 'overlay' or 'child-frame', +in which case the context is shown in an overlay or child-frame at the +top-left of the current window. The latter option requires a +graphical frame. On non-graphical frames, the context is shown in the +echo area. + +** Comint + ++++ +*** 'comint-term-environment' is now aware of connection-local variables. +The user option 'comint-terminfo-terminal' and the variable +'system-uses-terminfo' can now be set as connection-local variables to +change the terminal used on a remote host. + +--- +*** New user option 'comint-delete-old-input'. +When nil, this prevents comint from deleting the current input when +inserting previous input using '<mouse-2>'. The default is t, to +preserve previous behavior. + +--- +*** New minor mode 'comint-fontify-input-mode'. +This minor mode is enabled by default in "*shell*" and "*ielm*" +buffers. It fontifies input text according to 'shell-mode' or +'emacs-lisp-mode' font-lock rules. Customize the user options +'shell-fontify-input-enable' and 'ielm-fontify-input-enable' to nil if +you don't want to enable input fontification by default. + +** Mwheel + +--- +*** New user options for alternate wheel events. +The user options 'mouse-wheel-down-alternate-event' and +'mouse-wheel-up-alternate-event' as well as the variables +'mouse-wheel-left-alternate-event' and +'mouse-wheel-right-alternate-event' have been added to better support +systems where two kinds of wheel events can be received. + +** Internationalization + +--- +*** The '<Delete>' function key now allows deleting the entire composed sequence. +For the details, see the item about the 'delete-forward-char' command +above. + +--- +*** New user option 'composition-break-at-point'. +Setting it to a non-nil value temporarily disables automatic +composition of character sequences at point, and thus makes it easier +to edit such sequences by allowing point to "enter" the composed +sequence. + +--- +*** Support for many old scripts and writing systems. +Emacs now supports, and has language-environments and input methods, +for several dozens of old scripts that were used in the past for +various languages. For each such script Emacs now has font-selection +and character composition rules, a language environment, and an input +method. The newly-added scripts and the corresponding language +environments are: + + Tai Tham script and the Northern Thai language environment + + Brahmi script and language environment + + Kaithi script and language environment + + Tirhuta script and language environment + + Sharada script and language environment + + Siddham script and language environment + + Syloti Nagri script and language environment + + Modi script and language environment + + Baybayin script and Tagalog language environment + + Hanunoo script and language environment + + Buhid script and language environment + + Tagbanwa script and language environment + + Limbu script and language environment + + Balinese script and language environment + + Javanese script and language environment + + Sundanese script and language environment + + Batak script and language environment + + Rejang script and language environment + + Makasar script and language environment + + Lontara script and language environment + + Hanifi Rohingya script and language environment + + Grantha script and language environment + + Kharoshthi script and language environment + + Lepcha script and language environment + + Meetei Mayek script and language environment + + Adlam script and language environment + + Mende Kikakui script and language environment + + Wancho script and language environment + + Toto script and language environment + + Gothic script and language environment + + Coptic script and language environment + +--- +*** The "Oriya" language environment was renamed to "Odia". +This is to follow the change in the official name of the script. The +'oriya' input method was also renamed to 'odia'. However, the old +name of the language environment and the input method are still +supported. + +--- +*** New Greek translation of the Emacs tutorial. +Type 'C-u C-h t' to select it in case your language setup does not do +so automatically. + +--- +*** New Ukrainian translation of the Emacs Tutorial. + +--- +*** New default phonetic input method for the Tamil language environment. +The default input method for the Tamil language environment is now +"tamil-phonetic" which is a customizable phonetic input method. To +change the input method's translation rules, customize the user option +'tamil-translation-rules'. + +--- +*** New 'tamil99' input method for the Tamil language. +This supports the keyboard layout specifically designed for the Tamil +language. + +--- +*** New input method 'slovak-qwerty'. +This is a variant of the 'slovak' input method, which corresponds to +the QWERTY Slovak keyboards. + +--- +*** New input method 'cyrillic-chuvash'. +This input method is based on the russian-computer input method, and +is intended for typing in the Chuvash language written in the Cyrillic +script. + +--- +*** New input method 'cyrillic-mongolian'. +This input method is for typing in the Mongolian language using the +Cyrillic script. + + +* Changes in Specialized Modes and Packages in Emacs 29.1 + +** Ecomplete + +--- +*** New commands 'ecomplete-edit' and 'ecomplete-remove'. +These allow you to (respectively) edit and bulk-remove entries from +the ecomplete database. + +--- +*** New user option 'ecomplete-auto-select'. +If non-nil and there's only one matching option, auto-select that. + +--- +*** New user option 'ecomplete-filter-regexp'. +If non-nil, this user option describes what entries not to add to the +database stored on disk. + +** Auth Source + ++++ +*** New user option 'auth-source-pass-extra-query-keywords'. +Whether to recognize additional keyword params, like ':max' and +':require', as well as accept lists of query terms paired with +applicable keywords. This disables most known behavioral quirks +unique to auth-source-pass, such as wildcard subdomain matching. + +** Dired + ++++ +*** 'dired-guess-shell-command' moved from dired-x to dired. +This means that 'dired-do-shell-command' will now provide smarter +defaults without first having to require 'dired-x'. See the node +"(emacs) Shell Command Guessing" in the Emacs manual for more details. + +--- +*** 'dired-clean-up-buffers-too' moved from dired-x to dired. +This means that Dired now offers to kill buffers visiting files and +dirs when they are deleted in Dired. Before, you had to require +'dired-x' to enable this behavior. To disable this behavior, +customize the user option 'dired-clean-up-buffers-too' to nil. The +related user option 'dired-clean-confirm-killing-deleted-buffers' +(which see) has also been moved to 'dired'. + ++++ +*** 'dired-do-relsymlink' moved from dired-x to dired. +The corresponding key 'Y' is now bound by default in Dired. + ++++ +*** 'dired-do-relsymlink-regexp' moved from dired-x to dired. +The corresponding key sequence '% Y' is now bound by default in Dired. + +--- +*** 'M-G' is now bound to 'dired-goto-subdir'. +Before, that binding was only available if the dired-x package was +loaded. + ++++ +*** 'dired-info' and 'dired-man' moved from dired-x to dired. +The 'dired-info' and 'dired-man' commands have been moved from the +dired-x package to dired. They have also been renamed to +'dired-do-info' and 'dired-do-man'; the old command names are obsolete +aliases. + +The keys 'I' ('dired-do-info') and 'N' ('dired-do-man') are now bound +in Dired mode by default. The user options 'dired-bind-man' and +'dired-bind-info' no longer have any effect and are obsolete. + +To get the old behavior back and unbind these keys in Dired mode, add +the following to your Init file: + + (with-eval-after-load 'dired + (keymap-set dired-mode-map "N" nil) + (keymap-set dired-mode-map "I" nil)) + +--- +*** New command 'dired-do-eww'. +This command visits the file on the current line with EWW. + +--- +*** New user option 'dired-omit-lines'. +This is used by 'dired-omit-mode', and now allows you to hide based on +other things than just the file names. + ++++ +*** New user option 'dired-mouse-drag-files'. +If non-nil, dragging file names with the mouse in a Dired buffer will +initiate a drag-and-drop session allowing them to be opened in other +programs. + ++++ +*** New user option 'dired-free-space'. +Dired will now, by default, include the free space in the first line +instead of having it on a separate line. To get the previous behavior +back, say: + + (setopt dired-free-space 'separate) + +--- +*** New user option 'dired-make-directory-clickable'. +If non-nil (which is the default), hitting 'RET' or 'mouse-1' on +the directory components at the directory displayed at the start of +the buffer will take you to that directory. + +--- +*** Search and replace in Dired/Wdired supports more regexps. +For example, the regexp ".*" will match only characters that are part +of the file name. Also "^.*$" can be used to match at the beginning +of the file name and at the end of the file name. This is used only +when searching on file names. In Wdired this can be used when the new +user option 'wdired-search-replace-filenames' is non-nil (which is the +default). + +** Elisp + +--- +*** New command 'elisp-eval-region-or-buffer' (bound to 'C-c C-e'). +This command evals the forms in the active region or in the whole buffer. + +--- +*** New commands 'elisp-byte-compile-file' and 'elisp-byte-compile-buffer'. +These commands (bound to 'C-c C-f' and 'C-c C-b', respectively) +byte-compile the visited file and the current buffer, respectively. + +** Games + +--- +*** New user option 'tetris-allow-repetitions'. +This controls how randomness is implemented (whether to use pure +randomness as before, or to use a bag). + +** Battery + ++++ +*** New user option 'battery-update-functions'. +This can be used to trigger actions based on the battery status. + +** DocView + +--- +*** doc-view can now generate SVG images when viewing PDF files. +If Emacs is built with SVG support, doc-view can generate SVG files +when using MuPDF as the converter for PDF files, which generally leads +to sharper images (especially when zooming), and allows customization +of background and foreground color of the page via the new user +options 'doc-view-svg-background' and 'doc-view-svg-foreground'. To +activate this behavior, set 'doc-view-mupdf-use-svg' to non-nil if +your Emacs has SVG support. Note that, with some versions of MuPDF, +SVG generation is known to sometimes produce SVG files that are buggy +or can take a long time to render. + +** Enriched Mode + ++++ +*** New command 'enriched-toggle-markup'. +This allows you to see the markup in 'enriched-mode' buffers (e.g., +the "HELLO" file). + +** Shell Script Mode + +--- +*** New user option 'sh-indent-statement-after-and'. +This controls how statements like the following are indented: + + foo && + bar + +*** New Flymake backend using the ShellCheck program. +It is enabled by default, but requires that the external "shellcheck" +command is installed. + +** CC Mode + +--- +*** C++ Mode now supports most of the new features in the C++20 Standard. + +--- +*** In Objective-C Mode, no extra types are recognized by default. +The default value of 'objc-font-lock-extra-types' has been changed to +nil, since too many identifiers were getting misfontified as types. +This may cause some actual types not to get fontified. To get the old +behavior back, customize the user option to the value suggested in its +doc string. + +** Cperl Mode + +--- +*** New user option 'cperl-file-style'. +This option determines the indentation style to be used. It can also +be used as a file-local variable. + +** Gud + +--- +*** 'gud-go' is now bound to 'C-c C-v'. +If given a prefix, it will prompt for an argument to use for the +run/continue command. + +--- +*** 'perldb' now recognizes '-E'. +As of Perl 5.10, 'perl -E 0' behaves like 'perl -e 0' but also activates +all optional features of the Perl version in use. 'perldb' now uses +this invocation as its default. + +** Customize + +--- +*** New command 'custom-toggle-hide-all-widgets'. +This is bound to 'H' and toggles whether to hide or show the widget +contents. + +** Diff Mode + +--- +*** New user option 'diff-whitespace-style'. +Sets the value of the buffer-local variable 'whitespace-style' in +'diff-mode' buffers. By default, this variable is '(face trailing)', +which preserves behavior of previous Emacs versions. + ++++ +*** New user option 'diff-add-log-use-relative-names'. +If non-nil insert file names in ChangeLog skeletons relative to the +VC root directory. + +** Ispell + +--- +*** 'ispell-region' and 'ispell-buffer' now push the mark. +These commands push onto the mark ring the location of the last +misspelled word where corrections were offered, so that you can then +skip back to that location with 'C-x C-x'. + +** Dabbrev + +--- +*** New function 'dabbrev-capf' for use on 'completion-at-point-functions'. + ++++ +*** New user option 'dabbrev-ignored-buffer-modes'. +Buffers with major modes in this list will be ignored. By default, +this includes "binary" buffers like 'archive-mode' and 'image-mode'. + +** Package + ++++ +*** New command 'package-update'. +This command allows you to upgrade packages without using 'M-x +list-packages'. + ++++ +*** New command 'package-update-all'. +This command allows updating all packages without any queries. + ++++ +*** New commands 'package-recompile' and 'package-recompile-all'. +These commands can be useful if the ".elc" files are out of date +(invalid byte code and macros). + ++++ +*** New DWIM action on 'x' in "*Packages*" buffer. +If no packages are marked, 'x' will install the package under point if +it isn't already, and remove it if it is installed. + ++++ +*** New command 'package-vc-install'. +Packages can now be installed directly from source by cloning from +their repository. + ++++ +*** New command 'package-vc-install-from-checkout'. +An existing checkout can now be loaded via package.el, by creating a +symbolic link from the usual package directory to the checkout. + ++++ +*** New command 'package-vc-checkout'. +Used to fetch the source of a package by cloning a repository without +activating the package. + ++++ +*** New command 'package-vc-prepare-patch'. +This command allows you to send patches to package maintainers, for +packages checked out using 'package-vc-install'. + ++++ +*** New command 'package-report-bug'. +This command helps you compose an email for sending bug reports to +package maintainers. + ++++ +*** New user option 'package-vc-selected-packages'. +By customizing this user option you can specify specific packages to +install. + +** Emacs Sessions (Desktop) + ++++ +*** New user option to load a locked desktop if locking Emacs is not running. +The option 'desktop-load-locked-desktop' can now be set to the value +'check-pid', which means to allow loading a locked ".emacs.desktop" +file if the Emacs process which locked it is no longer running on the +local machine. This allows avoiding questions about locked desktop +files when the Emacs session which locked it crashes, or was otherwise +interrupted and didn't exit gracefully. See the "(emacs) Saving +Emacs Sessions" node in the Emacs manual for more details. + +** Miscellaneous + ++++ +*** New command 'scratch-buffer'. +This command switches to the "*scratch*" buffer. If "*scratch*" doesn't +exist, the command creates it first. You can use this command if you +inadvertently delete the "*scratch*" buffer. + +** Debugging + +--- +*** 'q' in a "*Backtrace*" buffer no longer clears the buffer. +Instead it just buries the buffer and switches the mode from +'debugger-mode' to 'backtrace-mode', since commands like 'e' are no +longer available after exiting the recursive edit. + ++++ +*** New user option 'debug-allow-recursive-debug'. +This user option controls whether the 'e' (in a "*Backtrace*" +buffer or while edebugging) and 'C-x C-e' (while edebugging) commands +lead to a (further) backtrace. By default, this variable is nil, +which is a change in behavior from previous Emacs versions. + ++++ +*** 'e' in edebug can now take a prefix arg to pretty-print the results. +When invoked with a prefix argument, as in 'C-u e', this command will +pop up a new buffer and show the full pretty-printed value there. + ++++ +*** 'C-x C-e' now interprets a non-zero prefix arg to pretty-print the results. +When invoked with a non-zero prefix argument, as in 'C-u C-x C-e', +this command will pop up a new buffer and show the full pretty-printed +value there. + ++++ +*** You can now generate a backtrace from Lisp errors in redisplay. +To do this, set the new variable 'backtrace-on-redisplay-error' to a +non-nil value. The backtrace will be written to a special buffer +named "*Redisplay-trace*". This buffer will not be automatically +displayed in a window. + +** Compile + ++++ +*** New user option 'compilation-hidden-output'. +This can be used to make specific parts of compilation output +invisible. + ++++ +*** The 'compilation-auto-jump-to-first-error' user option has been extended. +It can now have the additional values 'if-location-known' (which will +only jump if the location of the first error is known), and +'first-known' (which will jump to the first known error location). + ++++ +*** New user option 'compilation-max-output-line-length'. +Lines longer than the value of this option will have their ends +hidden, with a button to reveal the hidden text. This speeds up +operations like grepping on files that have few newlines. The default +value is 400; set to nil to disable hiding. + +** Flymake + ++++ +*** New user option 'flymake-mode-line-lighter'. + ++++ +** New minor mode 'word-wrap-whitespace-mode' for extending 'word-wrap'. +This mode switches 'word-wrap' on, and breaks on all the whitespace +characters instead of just 'SPC' and 'TAB'. + +--- +** New mode, 'emacs-news-mode', for editing the NEWS file. +This mode adds some highlighting, makes the 'M-q' command aware of the +format of NEWS entries, and has special commands for doing maintenance +of the Emacs NEWS files. In addition, this mode turns on +'outline-minor-mode', and thus displays customizable icons (see +'icon-preference') in the margins. To disable these icons, set +'outline-minor-mode-use-buttons' to a nil value. + +--- +** Kmacro +Kmacros are now OClosures and have a new constructor 'kmacro' which +uses the 'key-parse' syntax. It replaces the old 'kmacro-lambda-form' +(which is now declared obsolete). + +--- +** savehist.el can now truncate variables that are too long. +An element of user option 'savehist-additional-variables' can now be +of the form '(VARIABLE . MAX-ELTS)', which means to truncate the +VARIABLE's value to at most MAX-ELTS elements (if the value is a list) +before saving the value. + +** Minibuffer and Completions + ++++ +*** New commands for navigating completions from the minibuffer. +When the minibuffer is the current buffer, typing 'M-<up>' or +'M-<down>' selects a previous/next completion candidate from the +"*Completions*" buffer and inserts it to the minibuffer. +When the user option 'minibuffer-completion-auto-choose' is nil, +'M-<up>' and 'M-<down>' do the same, but without inserting +a completion candidate to the minibuffer, then 'M-RET' can be used +to choose the currently active candidate from the "*Completions*" +buffer and exit the minibuffer. With a prefix argument, 'C-u M-RET' +inserts the currently active candidate to the minibuffer, but doesn't +exit the minibuffer. These keys are also available for in-buffer +completion, but they don't insert candidates automatically, you need +to type 'M-RET' to insert the selected candidate to the buffer. + ++++ +*** Choosing a completion with a prefix argument doesn't exit the minibuffer. +This means that typing 'C-u RET' on a completion candidate in the +"*Completions*" buffer inserts the completion into the minibuffer, +but doesn't exit the minibuffer. + ++++ +*** The "*Completions*" buffer can now be automatically selected. +To enable this behavior, customize the user option +'completion-auto-select' to t, then pressing 'TAB' will switch to the +"*Completions*" buffer when it pops up that buffer. If the value is +'second-tab', then the first 'TAB' will display "*Completions*", and +the second one will switch to the "*Completions*" buffer. + +--- +*** New user option 'completion-auto-wrap'. +When non-nil, the commands 'next-completion' and 'previous-completion' +automatically wrap around on reaching the beginning or the end of +the "*Completions*" buffer. + ++++ +*** New values for the 'completion-auto-help' user option. +There are two new values to control the way the "*Completions*" buffer +behaves after pressing a 'TAB' if completion is not unique. The value +'always' updates or shows the "*Completions*" buffer after any attempt +to complete. The value 'visual' is like 'always', but only updates +the completions if they are already visible. The default value t +always hides the completion buffer after some completion is made. + +--- +*** New commands to complete the minibuffer history. +'minibuffer-complete-history' ('C-x <up>') is like 'minibuffer-complete' +but completes on the history items instead of the default completion +table. 'minibuffer-complete-defaults' ('C-x <down>') completes +on the list of default items. + ++++ +*** User option 'minibuffer-eldef-shorten-default' is now obsolete. +Customize the user option 'minibuffer-default-prompt-format' instead. + ++++ +*** New user option 'completions-sort'. +This option controls the sorting of the completion candidates in +the "*Completions*" buffer. Available styles are no sorting, +alphabetical (the default), or a custom sort function. + ++++ +*** New user option 'completions-max-height'. +This option limits the height of the "*Completions*" buffer. + ++++ +*** New user option 'completions-header-format'. +This is a string to control the header line to show in the +"*Completions*" buffer before the list of completions. +If it contains "%s", that is replaced with the number of completions. +If nil, the header line is not shown. + ++++ +*** New user option 'completions-highlight-face'. +When this user option names a face, the current +candidate in the "*Completions*" buffer is highlighted with that face. +The nil value disables this highlighting. The default is to highlight +using the 'completions-highlight' face. + ++++ +*** You can now define abbrevs for the minibuffer modes. +'minibuffer-mode-abbrev-table' and +'minibuffer-inactive-mode-abbrev-table' are now defined. + +** Isearch and Replace + ++++ +*** Changes in how Isearch responds to 'mouse-yank-at-point'. +If a user does 'C-s' and then uses '<mouse-2>' ('mouse-yank-primary') +outside the echo area, Emacs will, by default, end the Isearch and +yank the text at mouse cursor. But if 'mouse-yank-at-point' is +non-nil, the text will now be added to the Isearch instead. + ++++ +*** Changes for values 'no' and 'no-ding' of 'isearch-wrap-pause'. +Now with these values the search will wrap around not only on repeating +with 'C-s C-s', but also after typing a character. + ++++ +*** New user option 'char-fold-override'. +Non-nil means that the default definitions of equivalent characters +are overridden. + +*** New command 'describe-char-fold-equivalences'. +It displays character equivalences used by 'char-fold-to-regexp'. + ++++ +*** New command 'isearch-emoji-by-name'. +It is bound to 'C-x 8 e RET' during an incremental search. The +command accepts the Unicode name of an Emoji (for example, "smiling +face" or "heart with arrow"), like 'C-x 8 e e', with minibuffer +completion, and adds the Emoji into the search string. + +** GDB/MI + +--- +*** New user option 'gdb-debuginfod-enable-setting'. +On capable platforms, GDB 10.1 and later can download missing source +and debug info files from special-purpose servers, called "debuginfod +servers". Use this new option to control whether 'M-x gdb' instructs +GDB to download missing files from debuginfod servers when you debug +the corresponding programs. The default is to ask you at the +beginning of each debugging session whether to download the files for +that session. + +** Glyphless Characters + ++++ +*** New minor mode 'glyphless-display-mode'. +This allows an easy way to toggle seeing all glyphless characters in +the current buffer. + +--- +*** The extra slot of 'glyphless-char-display' can now have cons values. +The extra slot of the 'glyphless-char-display' char-table can now have +values that are cons cells, specifying separate values for text-mode +and GUI terminals. + ++++ +*** "Replacement character" feature for undisplayable characters on TTYs. +The 'acronym' method of displaying glyphless characters on text-mode +frames treats single-character acronyms specially: they are displayed +without the surrounding '[..]' "box", thus in effect treating such +"acronyms" as replacement characters. + +** Registers + ++++ +*** Buffer names can now be stored in registers. +For instance, to enable jumping to the "*Messages*" buffer with +'C-x r j m': + + (set-register ?m '(buffer . "*Messages*")) + +** Pixel Fill + ++++ +*** This is a new package that deals with filling variable-pitch text. + ++++ +*** New function 'pixel-fill-region'. +This fills the region to be no wider than a specified pixel width. + +** Info + ++++ +*** Command 'info-apropos' now takes a prefix argument to search for regexps. + +--- +*** New command 'Info-goto-node-web' and key binding 'G'. +This will take you to the "gnu.org" web server's version of the current +info node. This command only works for the Emacs and Emacs Lisp manuals. + +** Shortdoc + +--- +*** New command 'shortdoc-copy-function-as-kill' bound to 'w'. +It copies the name of the function near point into the kill ring. + +--- +*** 'N' and 'P' are now bound to 'shortdoc-{next,previous}-section'. +This is in addition to the old keybindings 'C-c C-n' and 'C-c C-p'. + +** VC + +--- +*** New command 'vc-pull-and-push'. +This commands first does a "pull" command, and if that is successful, +does a "push" command afterwards. Currently supported in Git and Bzr. + ++++ +*** 'C-x v b' prefix key is used now for branch commands. +'vc-print-branch-log' is bound to 'C-x v b l', and new commands are +'vc-create-branch' ('C-x v b c') and 'vc-switch-branch' ('C-x v b s'). +The VC Directory buffer now uses the prefix 'b' for these branch-related +commands. + ++++ +*** New command 'vc-dir-mark-by-regexp' bound to '% m' and '* %'. +This command marks files based on a regexp. If given a prefix +argument, unmark instead. + ++++ +*** New command 'C-x v !' ('vc-edit-next-command'). +This prefix command requests editing of the next VC shell command +before execution. For example, in a Git repository, you can produce a +log of more than one branch by typing 'C-x v ! C-x v b l' and then +appending additional branch names to the 'git log' command. + +The intention is that this command can be used to access a wide +variety of version control system-specific functionality from VC +without complexifying either the VC command set or the backend API. + +--- +*** 'C-x v v' in a diffs buffer allows to commit only some of the changes. +This command is intended to allow you to commit only some of the +changes you have in your working tree. Begin by creating a buffer +with the changes against the last commit, e.g. with 'C-x v D' +('vc-root-diff'). Then edit the diffs to remove the hunks you don't +want to commit. Finally, type 'C-x v v' in that diff buffer to commit +only part of your changes, those whose hunks were left in the buffer. + +--- +*** 'C-x v v' on an unregistered file will now use the most specific backend. +Previously, if you had an SVN-covered "~/" directory, and a Git-covered +directory in "~/foo/bar", using 'C-x v v' on a new, unregistered file +"~/foo/bar/zot" would register it in the SVN repository in "~/" instead of +in the Git repository in "~/foo/bar". This makes this command +consistent with 'vc-responsible-backend'. + +--- +*** Log Edit now fontifies long Git commit summary lines. +Writing shorter summary lines avoids truncation in contexts in which +Git commands display summary lines. See the two new user options +'vc-git-log-edit-summary-target-len' and 'vc-git-log-edit-summary-max-len'. + +--- +*** New 'log-edit-headers-separator' face. +It is used to style the line that separates the 'log-edit' headers +from the 'log-edit' summary. + +--- +*** The function 'vc-read-revision' accepts a new MULTIPLE argument. +If non-nil, multiple revisions can be queried. This is done using +'completing-read-multiple'. + +--- +*** New function 'vc-read-multiple-revisions'. +This function invokes 'vc-read-revision' with a non-nil value for +MULTIPLE. + ++++ +*** New command 'vc-prepare-patch'. +Patches for any version control system can be prepared using VC. The +command will query what commits to send and will compose messages for +your mail user agent. The behavior of 'vc-prepare-patch' can be +modified by the user options 'vc-prepare-patches-separately' and +'vc-default-patch-addressee'. + +** Message + +--- +*** New user option 'mml-attach-file-at-the-end'. +If non-nil, 'C-c C-a' will put attached files at the end of the message. + +--- +*** Message Mode now supports image yanking. + ++++ +*** New user option 'message-server-alist'. +This controls automatic insertion of the "X-Message-SMTP-Method" +header before sending a message. + +** HTML Mode + +--- +*** HTML Mode now supports "text/html" and "image/*" yanking. + +** Texinfo Mode + +--- +*** 'texinfo-mode' now has a specialized 'narrow-to-defun' definition. +It narrows to the current node. + +** EUDC + ++++ +*** Deprecations planned for next release. +After Emacs 29.1, some aspects of EUDC will be deprecated. The goal +of these deprecations is to simplify EUDC server configuration by +making 'eudc-server-hotlist' the only place to add servers. There +will not be a need to set the server using the 'eudc-set-server' +command. Instead, the 'eudc-server-hotlist' user option should be +customized to have an entry for the server. The plan is to obsolete +the 'eudc-hotlist' package since Customize is sufficient for changing +'eudc-server-hotlist'. How the 'eudc-server' user option works in this +context is to-be-determined; it can't be removed, because that would +break compatibility, but it may become synchronized with +'eudc-server-hotlist' so that 'eudc-server' is always equal to '(car +eudc-server-hotlist)'. The first entry in 'eudc-server-hotlist' is the +first server tried by 'eudc-expand-try-all'. The hotlist +simplification will allow 'eudc-query-form' to show a drop down of +possible servers, instead of requiring a call to 'eudc-set-server' +like it does in this release. The default value of +'eudc-ignore-options-file' will be changed from nil to t. + ++++ +*** New user option 'eudc-ignore-options-file' that defaults to nil. +The 'eudc-ignore-options-file' user option can be configured to ignore +the 'eudc-options-file' (typically "~/.emacs.d/eudc-options"). Most +users should configure this to t and put EUDC configuration in the +main Emacs initialization file ("~/.emacs" or "~/.emacs.d/init.el"). + ++++ +*** 'eudc-expansion-overwrites-query' to 'eudc-expansion-save-query-as-kill'. +The user option 'eudc-expansion-overwrites-query' is renamed to +'eudc-expansion-save-query-as-kill' to reflect the actual behavior of +the user option. The former is kept as alias. + ++++ +*** New command 'eudc-expand-try-all'. +This command can be used in place of 'eudc-expand-inline'. It takes a +prefix argument that causes 'eudc-expand-try-all' to return matches +from all servers instead of just the matches from the first server to +return any. This is useful for example, if one wants to search LDAP +for a name that happens to match a contact in one's BBDB. + ++++ +*** New behavior and default for user option 'eudc-inline-expansion-format'. +EUDC inline expansion result formatting defaulted to + + ("%s %s <%s>" firstname name email) + +Since email address specifications need to comply with RFC 5322 in +order to be useful in messages, there was a risk to produce syntax +which was standard with RFC 822, but is marked as obsolete syntax by +its successor RFC 5322. Also, the first and last name part was never +enclosed in double quotes, potentially producing invalid address +specifications, which may be rejected by a receiving MTA. Thus, this +variable can now additionally be set to nil (the new default), or a +function. In both cases, the formatted result will be in compliance +with RFC 5322. When set to nil, a default format very similar to the +old default will be produced. When set to a function, that function +is called, and the returned values are used to populate the phrase and +comment parts (see RFC 5322 for definitions). In both cases, the +phrase part will be automatically quoted if necessary. + ++++ +*** New function 'eudc-capf-complete' with 'message-mode' integration. +EUDC can now contribute email addresses to 'completion-at-point' by +adding the new function 'eudc-capf-complete' to +'completion-at-point-functions' in 'message-mode'. + ++++ +*** Additional attributes of query and results in eudcb-macos-contacts.el. +The EUDC back-end for the macOS Contacts app now provides a wider set +of attributes to use for queries, and delivers more attributes in +query results. + ++++ +*** New back-end for ecomplete. +A new back-end for ecomplete allows information from that database to +be queried by EUDC, too. The attributes present in the EUDC query are +used to select the entry type in the ecomplete database. + ++++ +*** New back-end for mailabbrev. +A new back-end for mailabbrev allows information from that database to +be queried by EUDC, too. The attributes 'email', 'name', and 'firstname' +are supported only. + +** EWW/SHR + ++++ +*** New user option to automatically rename EWW buffers. +The 'eww-auto-rename-buffer' user option can be configured to rename +rendered web pages by using their title, URL, or a user-defined +function which returns a string. For the first two cases, the length +of the resulting name is controlled by the user option +'eww-buffer-name-length'. By default, no automatic renaming is +performed. + ++++ +*** New user option 'shr-allowed-images'. +This complements 'shr-blocked-images', but allows specifying just the +allowed images. + ++++ +*** New user option 'shr-use-xwidgets-for-media'. +If non-nil (and Emacs has been built with support for xwidgets), +display <video> elements with an xwidget. Note that this is +experimental; it is known to crash Emacs on some systems, and just +doesn't work on other systems. Also see etc/PROBLEMS. + ++++ +*** New user option 'eww-url-transformers'. +These are used to alter an URL before using it. By default it removes +the common "utm_" trackers from URLs. + +** Find Dired + +--- +*** New command 'find-dired-with-command'. +This enables users to run 'find-dired' with an arbitrary command, +enabling running commands previously unsupported and also enabling new +commands to be built on top. + +** Gnus + ++++ +*** Tool bar changes in Gnus/Message. +There were previously two styles of tool bars available in Gnus and +Message, referred to as 'gnus-summary-tool-bar-retro', +'gnus-group-tool-bar-retro' and 'message-tool-bar-retro', and +'gnus-summary-tool-bar-gnome', 'gnus-group-tool-bar-gnome' and +'message-tool-bar-gnome'. The "retro" tool bars have been removed (as +well as the icons used), and the "gnome" tool bars are now the only +pre-defined toolbars. + +--- +*** 'gnus-summary-up-thread' and 'gnus-summary-down-thread' bindings removed. +The 'gnus-summary-down-thread' binding to 'M-C-d' was shadowed by +'gnus-summary-read-document', and these commands are also available on +'T u' and 'T d' respectively. + +--- +*** Gnus now uses a variable-pitch font in the headers by default. +To get the monospace font back, you can put something like the +following in your ".gnus" file: + + (set-face-attribute 'gnus-header nil :inherit 'unspecified) + +--- +*** The default value of 'gnus-treat-fold-headers' is now 'head'. + +--- +*** New face 'gnus-header'. +All other 'gnus-header-*' faces inherit from this face now. + ++++ +*** New user option 'gnus-treat-emojize-symbols'. +If non-nil, symbols that have an Emoji representation will be +displayed as emojis. The default is nil. + ++++ +*** New command 'gnus-article-emojize-symbols'. +This is bound to 'W D e' and will display symbols that have Emoji +representation as Emoji. + ++++ +*** New mu backend for gnus-search. +Configuration is very similar to the notmuch and namazu backends. It +supports the unified search syntax. + +--- +*** 'gnus-html-image-cache-ttl' is now a seconds count. +Formerly it was a pair of numbers '(A B)' that represented 65536*A + B, +to cater to older Emacs implementations that lacked bignums. +The older form still works but is undocumented. + +** Rmail + +--- +*** Rmail partial summaries can now be applied one on top of the other. +You can now narrow the set of messages selected by Rmail summary's +criteria (recipients, topic, senders, etc.) by making a summary of the +already summarized messages. For example, invoking +'rmail-summary-by-senders', followed by 'rmail-summary-by-topic' will +produce a summary where both the senders and the topic are according +to your selection. The new user option +'rmail-summary-progressively-narrow' controls whether the stacking of +the filters is in effect; customize it to a non-nil value to enable +this feature. + +--- +*** New Rmail summary: by thread. +The new command 'rmail-summary-by-thread' produces a summary of +messages that belong to a single thread of discussion. + +** EIEIO + ++++ +*** 'slot-value' can now be used to access slots of 'cl-defstruct' objects. + +** Align + +--- +*** Alignment in 'text-mode' has changed. +Previously, 'M-x align' didn't do anything, and you had to say 'C-u +M-x align' for it to work. This has now been changed. The default +regexp for 'C-u M-x align-regexp' has also been changed to be easier +for inexperienced users to use. + +** Help + +--- +*** New mode, 'emacs-news-view-mode', for viewing the NEWS file. +This mode is used by the 'C-h N' command, and adds buttons to manual +entries and symbol references. + +--- +*** New user option 'help-link-key-to-documentation'. +When this option is non-nil (which is the default), key bindings +displayed in the "*Help*" buffer will be linked to the documentation +for the command they are bound to. This does not affect listings of +key bindings and functions (such as 'C-h b'). + +** Info Look + +--- +*** info-look specs can now be expanded at run time instead of a load time. +The new ':doc-spec-function' element can be used to compute the +':doc-spec' element when the user asks for info on that particular +mode (instead of at load time). + +** Ansi Color + +--- +*** Support for ANSI 256-color and 24-bit colors. +256-color and 24-bit color codes are now handled by ANSI color +filters and displayed with the specified color. + +** Term Mode + +--- +*** New user option 'term-bind-function-keys'. +If non-nil, 'term-mode' will pass the function keys on to the +underlying shell instead of using the normal Emacs bindings. + +--- +*** Support for ANSI 256-color and 24-bit colors, italic and other fonts. +'term-mode' can now display 256-color and 24-bit color codes. It can +also handle ANSI codes for faint, italic and blinking text, displaying +it with new 'term-{faint,italic,slow-blink,fast-blink}' faces. + +** Project + ++++ +*** 'project-find-file' and 'project-or-external-find-file' can include all. +The commands 'project-find-file' and 'project-or-external-find-file' +now accept a prefix argument, which is interpreted to mean "include +all files". + ++++ +*** New command 'project-list-buffers' bound to 'C-x p C-b'. +This command displays a list of buffers from the current project. + ++++ +*** 'project-kill-buffers' can display the list of buffers to kill. +Customize the user option 'project-kill-buffers-display-buffer-list' +to enable the display of the buffer list. + +*** New user option 'project-vc-extra-root-markers'. +Use it to add detection of nested projects (inside a VCS repository), +or projects outside of VCS repositories. + +As a consequence, the 'VC project backend' is formally renamed to +'VC-aware project backend'. + ++++ +*** New user option 'project-vc-include-untracked'. +If non-nil, files untracked by a VCS are considered to be part of +the project by a VC project based on that VCS. + +** Xref + ++++ +*** New command 'xref-go-forward'. +It is bound to 'C-M-,' and jumps to the location where you previously +invoked 'xref-go-back' ('M-,', also known as 'xref-pop-marker-stack'). + ++++ +*** The depth of the Xref marker stack is now infinite. +The implementation of the Xref marker stack was changed in a way that +allows as many places to be saved on the stack as needed, limited only +by the available memory. Therefore, the variables +'find-tag-marker-ring-length' and 'xref-marker-ring-length' are now +obsolete and unused; setting them has no effect. + ++++ +*** 'xref-query-replace-in-results' prompting change. +This command no longer prompts for FROM when called without prefix +argument. This makes the most common case faster: replacing entire +matches. + ++++ +*** New command 'xref-find-references-and-replace' to rename one identifier. + +--- +*** New variable 'xref-current-item' (renamed from a private version). + +--- +*** New function 'xref-show-xrefs'. + +*** 'outline-minor-mode' is supported in Xref buffers. +You can enable outlining by adding 'outline-minor-mode' to +'xref-after-update-hook'. + +** File Notifications + ++++ +*** The new command 'file-notify-rm-all-watches' removes all file notifications. + +** Sql + +--- +*** Sql now supports sending of passwords in-process. +To improve security, if an sql product has ':password-in-comint' set +to t, a password supplied via the minibuffer will be sent in-process, +as opposed to via the command-line. + +** Image Mode + ++++ +*** New command 'image-transform-fit-to-window'. +This command fits the image to the current window by scaling down or +up as necessary. Unlike 'image-transform-fit-both', this does not +only scale the image down, but up as well. It is bound to 's w' in +Image Mode by default. + +--- +*** New command 'image-mode-wallpaper-set'. +This command sets the desktop background to the current image. It is +bound to 'W' by default. + ++++ +*** 'image-transform-fit-to-{height,width}' are now obsolete. +Use the new command 'image-transform-fit-to-window' instead. +The keybinding for 'image-transform-fit-to-width' is now 's i'. + +--- +*** User option 'image-auto-resize' can now be set to 'fit-window'. +This works like 'image-transform-fit-to-window'. + +--- +*** New user option 'image-auto-resize-max-scale-percent'. +The new 'fit-window' option will never scale an image more than this +much (in percent). It is nil by default, which means no limit. + +--- +*** New user option 'image-text-based-formats'. +This controls whether or not to show a message when opening certain +image formats saying how to edit it as text. The default is to show +this message for SVG and XPM. + ++++ +*** New command 'image-transform-set-percent'. +It allows setting the image size to a percentage of its original size, +and is bound to 's p' in Image mode. + ++++ +*** 'image-transform-original' renamed to 'image-transform-reset-to-original'. +The old name was confusing, and is now an obsolete function alias. + ++++ +*** 'image-transform-reset' renamed to 'image-transform-reset-to-initial'. +The old name was confusing, and is now an obsolete function alias. + +** Images + ++++ +** New commands 'image-crop' and 'image-cut'. +These commands allow interactively cropping/cutting the image at +point. The commands are bound to keys 'i c' and 'i x' (respectively) +in the local keymap over images. They rely on external programs, by +default "convert" from ImageMagick, to do the actual cropping/eliding +of the image file. + ++++ +*** New commands: 'image-flip-horizontally' and 'image-flip-vertically'. +These commands horizontally and vertically flip the image under point, +and are bound to 'i h' and 'i v', respectively. + ++++ +*** Users can now add special image conversion functions. +This is done via 'image-converter-add-handler'. + +** Image Dired + ++++ +*** 'image-dired-image-mode' is now based on 'image-mode'. +This avoids converting images in the background, and makes Image-Dired +noticeably faster. New keybindings from 'image-mode' are now +available in the "*image-dired-display-image*" buffer; press '?' or +'h' in that buffer to see the full list. + +--- +*** Navigation and marking commands now work in image display buffer. +The following new bindings have been added: +- 'n', 'SPC' => 'image-dired-display-next' +- 'p', 'DEL' => 'image-dired-display-previous' +- 'm' => 'image-dired-mark-thumb-original-file' +- 'd' => 'image-dired-flag-thumb-original-file' +- 'u' => 'image-dired-unmark-thumb-original-file' + +--- +*** New command 'image-dired-unmark-all-marks'. +It removes all marks from all files in the thumbnail and the +associated Dired buffer, and is bound to 'U' in the thumbnail and +display buffer. + +--- +*** New command 'image-dired-do-flagged-delete'. +It deletes all flagged files, and is bound to 'x' in the thumbnail +buffer. It replaces the command 'image-dired-delete-marked', which is +now an obsolete alias. + +--- +*** New command 'image-dired-copy-filename-as-kill'. +It copies the name of the marked or current image to the kill ring, +and is bound to 'w' in the thumbnail buffer. + +--- +*** New command 'image-dired-wallpaper-set'. +This command sets the desktop background to the image at point in the +thumbnail buffer. It is bound to 'W' by default. + +--- +*** 'image-dired-slideshow-start' is now bound to 'S'. +It is bound in both the thumbnail and display buffer, and no longer +prompts for a timeout; use a numerical prefix (e.g. 'C-u 8 S') to set +the timeout. + +--- +*** New user option 'image-dired-marking-shows-next'. +If this option is non-nil (the default), marking, unmarking or +flagging an image in either the thumbnail or display buffer shows the +next image. + +--- +*** New face 'image-dired-thumb-flagged'. +If 'image-dired-thumb-mark' is non-nil (the default), this face is +used for images that are flagged for deletion in the Dired buffer +associated with Image-Dired. + +--- +*** Image information is now shown in the header line of the thumbnail buffer. +This replaces the message that most navigation commands in the +thumbnail buffer used to show at the bottom of the screen. + +--- +*** New specifiers for 'image-dired-display-properties-format'. +This is used to format the new header line. The new specifiers are: +"%d" for the name of the directory that the file is in, "%n" for +file's number in the thumbnail buffer, and "%s" for the file size. + +The default format has been updated to use this. If you prefer the +old format, add this to your Init file: + + (setopt image-dired-display-properties-format "%b: %f (%t): %c") + +--- +*** New faces for the header line of the thumbnail buffer. +These faces correspond to different parts of the header line, as +specified in 'image-dired-display-properties-format': +- 'image-dired-thumb-header-directory-name' +- 'image-dired-thumb-header-file-name' +- 'image-dired-thumb-header-file-size' +- 'image-dired-thumb-header-image-count' + +--- +*** PDF support. +Image-Dired now displays thumbnails for PDF files. Type 'RET' on a +PDF file in the thumbnail buffer to visit the corresponding PDF. + +--- +*** Support GraphicsMagick command line tools. +Support for the GraphicsMagick command line tool ("gm") has been +added, and is used when it is available instead of ImageMagick. + +--- +*** Support Thumbnail Managing Standard v0.9.0 (Dec 2020). +This standard allows sharing generated thumbnails across different +programs. Version 0.9.0 adds two larger thumbnail sizes: 512x512 and +1024x1024 pixels. See the user option 'image-dired-thumbnail-storage' +to use it; it is not enabled by default. + +--- +*** Reduce dependency on external "exiftool" program. +The 'image-dired-copy-with-exif-file-name' command no longer requires +an external "exiftool" program to be available. The user options +'image-dired-cmd-read-exif-data-program' and +'image-dired-cmd-read-exif-data-options' are now obsolete. + +--- +*** Support for bookmark.el. +The command 'bookmark-set' (bound to 'C-x r m') is now supported in +the thumbnail view, and will create a bookmark that opens the current +directory in Image-Dired. + +--- +*** The 'image-dired-slideshow-start' command no longer prompts. +It no longer inconveniently prompts for a number of images and a +delay: it runs indefinitely, but stops automatically on any command. +You can set the delay with a prefix argument, or a negative prefix +argument to prompt for a delay. Customize the user option +'image-dired-slideshow-delay' to change the default from 5 seconds. + ++++ +*** 'image-dired-show-all-from-dir-max-files' increased to 1000. +This user option controls asking for confirmation when starting +Image-Dired in a directory with many files. Since Image-Dired creates +thumbnails in the background in recent versions, this is not as +important as it used to be. You can now also customize this option to +nil to disable this confirmation completely. + +--- +*** 'image-dired-thumb-size' increased to 128. + ++++ +*** 'image-dired-db-file' renamed to 'image-dired-tags-db-file'. + +--- +*** 'image-dired-display-image-mode' renamed to 'image-dired-image-mode'. +The corresponding keymap is now named 'image-dired-image-mode-map'. + ++++ +*** Some commands have been renamed to be shorter. +- 'image-dired-display-thumbnail-original-image' has been renamed to + 'image-dired-display-this'. +- 'image-dired-display-next-thumbnail-original' has been renamed to + 'image-dired-display-next'. +- 'image-dired-display-previous-thumbnail-original' has been renamed + to 'image-dired-display-previous'. +The old names are now obsolete aliases. + +--- +*** 'image-dired-thumb-{height,width}' are now obsolete. +Customize 'image-dired-thumb-size' instead, which will set both the +height and width. + +--- +*** HTML image gallery generation is now obsolete. +The 'image-dired-gallery-generate' command and these user options are +now obsolete: 'image-dired-gallery-thumb-image-root-url', +'image-dired-gallery-hidden-tags', 'image-dired-gallery-dir', +'image-dired-gallery-image-root-url'. + +--- +*** 'image-dired-rotate-thumbnail-{left,right}' are now obsolete. +Instead, use commands 'image-dired-refresh-thumb' to generate a new +thumbnail, or 'image-rotate' to rotate the thumbnail without updating +the thumbnail file. + ++++ +*** Some commands and user options are now obsolete. +Since 'image-dired-display-image-mode' is now based on 'image-mode', +some commands and user options are no longer needed and are now obsolete: +'image-dired-cmd-create-temp-image-options', +'image-dired-cmd-create-temp-image-program', +'image-dired-display-current-image-full', +'image-dired-display-current-image-sized', +'image-dired-display-window-height-correction', +'image-dired-display-window-width-correction', +'image-dired-temp-image-file'. + +** Exif + +--- +*** New function 'exif-field'. +This is a convenience function to extract the field data from +'exif-parse-file' and 'exif-parse-buffer'. + +** Bookmarks + +--- +*** 'list-bookmarks' now includes a type column. +Types are registered via a 'bookmark-handler-type' symbol property on +the jumping function. + ++++ +*** 'bookmark-sort-flag' can now be set to 'last-modified'. +This will display bookmark list from most recently set to least +recently set. + +--- +*** When editing a bookmark annotation, 'C-c C-k' will now cancel. +It is bound to the new command 'bookmark-edit-annotation-cancel'. + +--- +*** New user option 'bookmark-fringe-mark'. +This option controls the bitmap used to indicate bookmarks in the +fringe (or nil to disable showing this marker). + +** Xwidget + +--- +*** New user option 'xwidget-webkit-buffer-name-format'. +This option controls how xwidget-webkit buffers are named. + +--- +*** New user option 'xwidget-webkit-cookie-file'. +This option controls whether the xwidget-webkit buffers save cookies +set by web pages, and if so, in which file to save them. + ++++ +*** New minor mode 'xwidget-webkit-edit-mode'. +When this mode is enabled, self-inserting characters and other common +web browser shortcut keys are redefined to send themselves to the +WebKit widget. + ++++ +*** New minor mode 'xwidget-webkit-isearch-mode'. +This mode acts similarly to incremental search, and allows searching +the contents of a WebKit widget. In xwidget-webkit mode, it is bound +to 'C-s' and 'C-r'. + ++++ +*** New command 'xwidget-webkit-browse-history'. +This command displays a buffer containing the page load history of +the current WebKit widget, and allows you to navigate it. + +--- +*** On X, the WebKit inspector is now available inside xwidgets. +To access the inspector, right click on the widget and select "Inspect +Element". + +--- +*** "Open in New Window" in a WebKit widget's context menu now works. +The newly created buffer will be displayed via 'display-buffer', which +can be customized through the usual mechanism of 'display-buffer-alist' +and friends. + +** Tramp + ++++ +*** New connection methods "docker", "podman" and "kubernetes". +They allow accessing containers provided by Docker and similar +programs. + +--- +*** Tramp supports abbreviating remote home directories now. +When calling 'abbreviate-file-name' on a Tramp file name, the result +will abbreviate the user's home directory, for example by abbreviating +"/ssh:user@host:/home/user" to "/ssh:user@host:~". + ++++ +*** New user option 'tramp-use-scp-direct-remote-copying'. +When set to non-nil, Tramp does not copy files between two remote +hosts via a local copy in its temporary directory, but lets the 'scp' +command do this job. + ++++ +*** Proper password prompts for methods "doas", "sudo" and "sudoedit". +The password prompts for these methods reflect now the credentials of +the user requesting such a connection, and not of the user who is the +target. This has always been needed, just the password prompt and the +related 'auth-sources' entry were wrong. + ++++ +*** New user option 'tramp-completion-use-cache'. +During user and host name completion in the minibuffer, results from +Tramp's connection cache are taken into account. This can be disabled +by setting the user option 'tramp-completion-use-cache' to nil. + +** Browse URL + +--- +*** New user option 'browse-url-default-scheme'. +This user option decides which URL scheme that 'browse-url' and +related functions will use by default. For example, you could +customize this to "https" to always prefer HTTPS URLs. + +--- +*** New user option 'browse-url-irc-function'. +This option specifies a function for opening "irc://" links. It +defaults to the new function 'browse-url-irc'. + +--- +*** New function 'browse-url-irc'. +This multipurpose autoloaded function can be used for opening "irc://" +and "ircs://" URLS by any caller that passes a URL string as an initial +arg. + +--- +*** Support for the Netscape web browser has been removed. +This support has been obsolete since Emacs 25.1. The final version of +the Netscape web browser was released in February, 2008. + +--- +*** Support for the Galeon web browser has been removed. +This support has been obsolete since Emacs 25.1. The final version of +the Galeon web browser was released in September, 2008. + +--- +*** Support for the Mozilla web browser is now obsolete. +Note that this historical web browser is different from Mozilla +Firefox; it is its predecessor. + +** Python Mode + ++++ +*** Project shells and a new user option 'python-shell-dedicated'. +When called with a prefix argument, 'run-python' now offers the choice +of creating a shell dedicated to the current project. This shell runs +in the project root directory and is shared among all project buffers. + +Without a prefix argument, the kind of shell (buffer-dedicated, +project-dedicated or global) is specified by the new +'python-shell-dedicated' user option. + +** Ruby Mode + +--- +*** New user option 'ruby-toggle-block-space-before-parameters'. + +--- +*** Support for endless methods. + +--- +*** New user options that determine indentation logic. +'ruby-method-params-indent', 'ruby-block-indent', +'ruby-after-operator-indent', 'ruby-method-call-indent', +'ruby-parenless-call-arguments-indent'. See the docstrings for +explanations and examples. + +** Eshell + ++++ +*** New feature to easily bypass Eshell's own pipelining. +Prefixing '|', '<' or '>' with an asterisk, i.e. '*|', '*<' or '*>', +will cause the whole command to be passed to the operating system +shell. This is particularly useful to bypass Eshell's own pipelining +support for pipelines which will move a lot of data. See section +"Running Shell Pipelines Natively" in the Eshell manual, node +"(eshell) Pipelines". + ++++ +*** New module to help supplying absolute file names to remote commands. +After enabling the new 'eshell-elecslash' module, typing a forward +slash as the first character of a command line argument will +automatically insert the Tramp prefix. The automatic insertion +applies only when 'default-directory' is remote and the command is a +Lisp function. This frees you from having to keep track of whether +commands are Lisp function or external when supplying absolute file +name arguments. See the "(eshell) Electric forward slash" node in the +Eshell manual for details. + ++++ +*** Improved support for redirection operators in Eshell. +Eshell now supports a wider variety of redirection operators. For +example, you can now redirect both stdout and stderr via '&>' or +duplicate one output handle to another via 'NEW-FD>&OLD-FD'. For more +information, see the "(eshell) Redirection" node in the Eshell manual. + ++++ +*** New eshell built-in command 'doas'. +The privilege-escalation program 'doas' has been added to the existing +'su' and 'sudo' commands from the 'eshell-tramp' module. The external +command may still be accessed by using '*doas'. + ++++ +*** Double-quoting an Eshell expansion now treats the result as a single string. +If an Eshell expansion like '$FOO' is surrounded by double quotes, the +result will always be a single string, no matter the type that would +otherwise be returned. + ++++ +*** Concatenating Eshell expansions now works more similarly to other shells. +When concatenating an Eshell expansion that returns a list, "adjacent" +elements of each operand are now concatenated together, +e.g. '$(list "a" "b")c' returns '("a" "bc")'. See the "(eshell) +Expansion" node in the Eshell manual for more details. + ++++ +*** Eshell subcommands with multiline numeric output return lists of numbers. +If every line of the output of an Eshell subcommand like '${COMMAND}' +is numeric, the result will be a list of numbers (or a single number +if only one line of output). Previously, this only converted numbers +when there was a single line of output. + +--- +*** Built-in Eshell commands now follow Posix/GNU argument syntax conventions. +Built-in commands in Eshell now accept command-line options with +values passed as a single token, such as '-oVALUE' or +'--option=VALUE'. New commands can take advantage of this with the +'eshell-eval-using-options' macro. See "Defining new built-in +commands" in the "(eshell) Built-ins" node of the Eshell manual. + +--- +*** Eshell globs ending with "/" now match only directories. +Additionally, globs ending with "**/" or "***/" no longer raise an +error, and now expand to all directories recursively (following +symlinks in the latter case). + ++++ +*** Lisp forms in Eshell now treat a nil result as a failed exit status. +When executing a command that looks like '(lisp form)' and returns +nil, Eshell will set the exit status (available in the '$?' +variable) to 2. This allows commands like that to be used in +conditionals. To change this behavior, customize the new +'eshell-lisp-form-nil-is-failure' user option. + +** Shell + +--- +*** New user option 'shell-kill-buffer-on-exit'. +Enabling this will automatically kill a "*shell*" buffer as soon as +the shell session terminates. + +--- +*** New minor mode 'shell-highlight-undef-mode'. +Customize 'shell-highlight-undef-enable' to t if you want to enable +this minor mode in "*shell*" buffers. It will highlight undefined +commands with a warning face as you type. + +** Calc + ++++ +*** New user option 'calc-kill-line-numbering'. +Set it to nil to exclude line numbering from kills and copies. + +** Hierarchy + ++++ +*** Tree Display can delay computation of children. +'hierarchy-add-tree' and 'hierarchy-add-trees' have an optional +argument which allows tree-widget display to be activated and computed +only when the user expands the node. + +** Proced + +--- +*** proced.el shows system processes of remote hosts. +When 'default-directory' is remote, and 'proced' is invoked with a +negative argument like 'C-u - proced', the system processes of that +remote host are shown. Alternatively, the user option +'proced-show-remote-processes' can be set to non-nil. +'proced-signal-function' has been marked obsolete. + +--- +*** Proced can now optionally show process details in color. +New user option 'proced-enable-color-flag' enables coloring of Proced +buffers. This option is disabled by default; customize it to a +non-nil value to enable colors. + +** Miscellaneous + +--- +*** New user option 'webjump-use-internal-browser'. +When non-nil, WebJump will use an internal browser to open web pages, +instead of the default external browser. + ++++ +*** New user option 'font-lock-ignore'. +This option provides a mechanism to selectively disable font-lock +keyword-driven fontifications. + +--- +*** New user option 'auto-save-visited-predicate'. +This user option is a predicate function which is called by +'auto-save-visited-mode' to decide whether or not to save a buffer. +You can use it to automatically save only specific buffers, for +example buffers using a particular mode or in some directory. + +--- +*** New user option 'remote-file-name-inhibit-auto-save-visited'. +If this user option is non-nil, 'auto-save-visited-mode' will not +auto-save remote buffers. The default is nil. + ++++ +*** New package vtable.el for formatting tabular data. +This package allows formatting data using variable-pitch fonts. +The resulting tables can display text in variable pitch fonts, text +using fonts of different sizes, and images. See the "(vtable) Top" +manual for more details. + +--- +*** New minor mode 'elide-head-mode'. +Enabling this minor mode turns on hiding header material, like +'elide-head' does; disabling it shows the header. The commands +'elide-head' and 'elide-head-show' are now obsolete. + +*** New package ansi-osc.el. +Support for OSC ("Operating System Command") escape sequences has been +extracted from comint.el in order to provide interpretation of OSC +sequences in compilation buffers. + +Adding the new function 'ansi-osc-compilation-filter' to +'compilation-filter-hook' enables interpretation of OSC escape +sequences in compilation buffers. By default, all sequences are +filtered out. + +The list of handlers (already covering OSC 7 and 8) has been extended +with a handler for OSC 2, the command to set a window title. + +--- +*** 'recentf-mode' now uses abbreviated file names by default. +This means that e.g. "/home/foo/bar" is now displayed as "~/bar". +Customize the user option 'recentf-filename-handlers' to nil to get +back the old behavior. + +--- +*** New command 'recentf-open'. +This command prompts for a recently opened file in the minibuffer, and +visits it. + +--- +*** 'ffap-machine-at-point' no longer pings hosts by default. +It will now simply look at a hostname to determine if it is valid, +instead of also trying to ping it. Customize the user option +'ffap-machine-p-known' to 'ping' to get the old behavior back. + +--- +*** The 'run-dig' command is now obsolete; use 'dig' instead. + +--- +*** Some 'bib-mode' commands and variables have been renamed. +To respect Emacs naming conventions, the variable 'unread-bib-file' +has been renamed to 'bib-unread-file'. The following commands have +also been renamed: + 'addbib' to 'bib-add' + 'return-key-bib' to 'bib-return-key' + 'mark-bib' to 'bib-mark' + 'unread-bib' to 'bib-unread' + +--- +*** 'outlineify-sticky' command is renamed to 'allout-outlinify-sticky'. +The old name is still available as an obsolete function alias. + +--- +*** The url-irc library now understands "ircs://" links. + +--- +*** New command 'world-clock-copy-time-as-kill' for 'world-clock-mode'. +It copies the current line into the kill ring. + +--- +*** 'edit-abbrevs' now uses font-locking. +The new face 'abbrev-table-name' is used to display the abbrev table +name. + +--- +*** New key binding 'O' in "*Buffer List*". +This key is now bound to 'Buffer-menu-view-other-window', which will +view this line's buffer in View mode in another window. + +** Scheme Mode + +--- +*** Auto-detection of Scheme library files. +Emacs now automatically enables the Scheme mode when opening R6RS +Scheme Library Source (".sls") files and R7RS Scheme Library +Definition (".sld") files. + +--- +*** Imenu members for R6RS and R7RS library members. +Imenu now lists the members directly nested in R6RS Scheme libraries +('library') and R7RS libraries ('define-library'). + + +* New Modes and Packages in Emacs 29.1 + ++++ +** Eglot: Emacs Client for the Language Server Protocol. +Emacs now comes with the Eglot package, which enhances various Emacs +features, such as completion, documentation, error detection, etc., +based on data provided by language servers using the Language Server +Protocol (LSP). See the new Info manual "(eglot) Top" for more. Also +see "etc/EGLOT-NEWS". + ++++ +** use-package: Declarative package configuration. +use-package is now shipped with Emacs. It provides the 'use-package' +macro, which allows you to isolate package configuration in your init +file in a way that is declarative, tidy, and performance-oriented. +See the new Info manual "(use-package) Top" for more. + +--- +** New package 'wallpaper'. +This package provides the command 'wallpaper-set', which sets the +desktop background image. Depending on the system and the desktop, +this may require an external program (such as "swaybg", "gm", +"display" or "xloadimage"). If so, a suitable command should be +detected automatically in most cases. It can also be customized +manually if needed, using the new user options 'wallpaper-command' and +'wallpaper-command-args'. + ++++ +** New package 'oclosure'. +This allows the creation of OClosures, which are "functions with +slots" or "function objects" that expose additional information about +themselves. Use the new macros 'oclosure-define' and +'oclosure-lambda' to create OClosures. See the "(elisp) OClosures" +node for more information. + ++++ +*** New generic function 'oclosure-interactive-form'. +Used by 'interactive-form' when called on an OClosure. +This allows specific OClosure types to compute their interactive specs +on demand rather than precompute them when created. + +--- +** New theme 'leuven-dark'. +This is a dark version of the 'leuven' theme. + ++++ +** New mode 'erts-mode'. +This mode is used to edit files geared towards testing actions in +Emacs buffers, like indentation and the like. The new ert function +'ert-test-erts-file' is used to parse these files. + +--- +** New major mode 'js-json-mode'. +This is a lightweight variant of 'js-mode' that is used by default +when visiting JSON files. + ++++ +** New major mode 'csharp-mode'. +A major mode based on CC Mode for editing programs in the C# language. +This mode is auto-enabled for files with the ".cs" extension. + ++++ +** New major modes based on the tree-sitter library. +These new major modes are available if Emacs was built with the +tree-sitter library. They provide support for font-locking, +indentation, and navigation by defuns based on parsing the buffer text +by a tree-sitter parser. Some major modes also offer support for +Imenu and 'which-func'. + +The new modes based on tree-sitter are for now entirely optional, and +you must turn them on manually, or load them in your init file, or +customize 'auto-mode-alist' to turn them on automatically for certain +files. You can also customize 'major-mode-remap-alist' to +automatically turn on some tree-sitter based modes for the same files +for which a "built-in" mode would be turned on. For example: + + (add-to-list 'major-mode-remap-alist '(ruby-mode . ruby-ts-mode)) + +If you try these modes and don't like them, you can go back to the +"built-in" modes by restarting Emacs. (If you use desktop.el to save +and restore Emacs sessions, make sure no buffer under these modes is +recorded in the desktop file, before restarting.) But please tell us +why you didn't like the tree-sitter based modes, so that we could try +improving them. + +Each major mode based on tree-sitter needs a language grammar library, +usually named "libtree-sitter-LANG.so" ("libtree-sitter-LANG.dll" on +MS-Windows), where LANG is the corresponding language name. Emacs +looks for these libraries in the following places: + + . in the directories mentioned in the list 'treesit-extra-load-path' + . in the "tree-sitter" subdirectory of your 'user-emacs-directory' + (by default, "~/.emacs.d/tree-sitter") + . in the standard system directories where other shared libraries are + usually installed + +We recommend to install these libraries in one of the standard system +locations (the last place in the above list). + +If a language grammar library required by a mode is not found in any +of the above places, the mode will display a warning when you try to +turn it on. + ++++ +*** New major mode 'typescript-ts-mode'. +A major mode based on the tree-sitter library for editing programs +in the TypeScript language. + ++++ +*** New major mode 'tsx-ts-mode'. +A major mode based on the tree-sitter library for editing programs +in the TypeScript language, with support for TSX. + ++++ +*** New major mode 'c-ts-mode'. +An optional major mode based on the tree-sitter library for editing +programs in the C language. + ++++ +*** New major mode 'c++-ts-mode'. +An optional major mode based on the tree-sitter library for editing +programs in the C++ language. + ++++ +*** New command 'c-or-c++-ts-mode'. +A command that automatically guesses the language of a header file, +and enables either 'c-ts-mode' or 'c++-ts-mode' accordingly. + ++++ +*** New major mode 'java-ts-mode'. +An optional major mode based on the tree-sitter library for editing +programs in the Java language. + ++++ +*** New major mode 'python-ts-mode'. +An optional major mode based on the tree-sitter library for editing +programs in the Python language. + ++++ +*** New major mode 'css-ts-mode'. +An optional major mode based on the tree-sitter library for editing +CSS (Cascading Style Sheets). + ++++ +*** New major mode 'json-ts-mode'. +An optional major mode based on the tree-sitter library for editing +programs in the JSON language. + ++++ +*** New major mode 'csharp-ts-mode'. +An optional major mode based on the tree-sitter library for editing +programs in the C# language. + ++++ +*** New major mode 'bash-ts-mode'. +Am optional major mode based on the tree-sitter library for editing +Bash shell scripts. + ++++ +*** New major mode 'dockerfile-ts-mode'. +A major mode based on the tree-sitter library for editing +Dockerfiles. + ++++ +*** New major mode 'cmake-ts-mode'. +A major mode based on the tree-sitter library for editing CMake files. + ++++ +*** New major mode 'toml-ts-mode'. +An optional major mode based on the tree-sitter library for editing +files written in TOML, a format for writing configuration files. + ++++ +*** New major mode 'go-ts-mode'. +A major mode based on the tree-sitter library for editing programs in +the Go language. + ++++ +*** New major mode 'go-mod-ts-mode'. +A major mode based on the tree-sitter library for editing "go.mod" +files. + ++++ +*** New major mode 'yaml-ts-mode'. +A major mode based on the tree-sitter library for editing files +written in YAML. + ++++ +*** New major mode 'rust-ts-mode'. +A major mode based on the tree-sitter library for editing programs in +the Rust language. + +--- +*** New major mode 'ruby-ts-mode'. +An optional major mode based on the tree-sitter library for editing +programs in the Ruby language. + + +* Incompatible Lisp Changes in Emacs 29.1 + ++++ +** The implementation of overlays has changed. +Emacs now uses an implementation of overlays that is much more +efficient than the original one, and should speed up all the +operations that involve overlays, especially when there are lots of +them in a buffer. + +As result of this, some minor incompatibilities in behavior could be +observed, as described below. Except those minor incompatibilities, +no other changes in behavior of overlays should be visible on the Lisp +or user level, with the exception of better performance and the order +of overlays returned by functions that don't promise any particular +order. + +--- +*** The function 'overlay-recenter' is now a no-op. +This function does nothing, and in particular has no effect on the +value returned by 'overlay-lists'. The purpose of 'overlay-recenter' +was to allow more efficient lookup of overlays around a certain buffer +position; however with the new implementation the lookup of overlays +is efficient regardless of their position, and there's no longer any +need to "optimize" the lookup, nor any notion of a "center" of the +overlays. + +--- +*** The function 'overlay-lists' returns one unified list of overlays. +This function used to return a cons of two lists, one with overlays +before the "center" position, the other after that "center". It now +returns a list whose 'car' is the list of all the buffer overlays, and +whose 'cdr' is always nil. + ++++ +** 'format-prompt' now uses 'substitute-command-keys'. +This means that both the prompt and 'minibuffer-default-prompt-format' +will have key definitions and single quotes handled specially. + ++++ +** New function 'substitute-quotes'. +This function works like 'substitute-command-keys' but only +substitutes quote characters. + +--- +** 'find-image' now uses 'create-image'. +This means that images found through 'find-image' also have +auto-scaling applied. (This only makes a difference on HiDPI +displays.) + ++++ +** Changes in how "raw" in-memory XBM images are specified. +Some years back Emacs gained the ability to scale images, and you +could then specify ':width' and ':height' when using 'create-image' on all +image types -- except XBM images, because this format already used the +':width' and ':height' arguments to specify the width/height of the "raw" +in-memory format. This meant that if you used these specifications +on, for instance, XBM files, Emacs would refuse to display them. This +has been changed, and ':width'/':height' now works as with all other image +formats, and the way to specify the width/height of the "raw" +in-memory format is now by using ':data-width' and ':data-height'. + ++++ +** "loaddefs.el" generation has been reimplemented. +The various "loaddefs.el" files in the Emacs tree (which contain +information about autoloads, built-in packages and package prefixes) +used to be generated by functions in autoloads.el. These are now +generated by loaddefs-gen.el instead. This leads to functionally +equivalent "loaddefs.el" files, but they do not use exactly the same +syntax, so using 'M-x update-file-autoloads' no longer works. (This +didn't work well in most files in the past, either, but it will now +signal an error in any file.) + +In addition, files are scanned in a slightly different way. +Previously, ';;;###' specs inside a top-level form (i.e., something +like '(when ... ;;;### ...)' would be ignored. They are now parsed as +usual. + +--- +** Themes have special autoload cookies. +All built-in themes are scraped for ';;;###theme-autoload' cookies +that are loaded along with the regular auto-loaded code. + ++++ +** 'buffer-modified-p' has been extended. +This function was previously documented to return only nil or t. This +has been changed to nil/'autosaved'/non-nil. The new 'autosaved' +value means that the buffer is modified, but that it hasn't been +modified since the time of last auto-save. + +--- +** 'with-silent-modifications' also restores buffer autosave status. +'with-silent-modifications' is a macro meant to be used by the font +locking machinery to allow applying text properties without changing +the modification status of the buffer. However, it didn't restore the +buffer autosave status, so applying font locking to a modified buffer +that had already been auto-saved would trigger another auto-saving. +This is no longer the case. + +--- +** 'prin1' doesn't always escape "." and "?" in symbols any more. +Previously, symbols like 'foo.bar' would be printed by 'prin1' as +"foo\.bar". This now prints as "foo.bar" instead. The Emacs Lisp +reader interprets these strings as referring to the same symbol, so +this is virtually always backwards-compatible, but there may +theoretically be code out there that expects a specific printed +representation. + +The same is the case with the "?" character: The 'foo?' symbol is now +printed as "foo?" instead of "foo\?". + +If the "." and "?" characters are the first character in the symbol, +they will still be escaped, so the '.foo' symbol is still printed as +"\.foo" and the '?bar' symbol is still printed as "\?bar". + ++++ +** Remapping 'mode-line' face no longer works as expected. +'mode-line' is now the parent face of the new 'mode-line-active' face, +and remapping parent of basic faces does not work reliably. +Instead of remapping 'mode-line', you have to remap 'mode-line-active'. + ++++ +** 'make-process' has been extended to support ptys when ':stderr' is set. +Previously, setting ':stderr' to a non-nil value would force the +process's connection to use pipes. Now, Emacs will use a pty for +stdin and stdout if requested no matter the value of ':stderr'. + +--- +** User option 'mail-source-ignore-errors' is now obsolete. +The whole mechanism for prompting users to continue in case of +mail-source errors has been removed, so this option is no longer +needed. + +** Fonts + +--- +*** Emacs now supports 'medium' fonts. +Emacs previously didn't distinguish between the 'regular'/'normal' +weight and the 'medium' weight, but it now also supports the (heavier) +'medium' weight. However, this means that if you specify a weight of +'normal' and the font doesn't have this weight, Emacs won't find the +font spec. In these cases, replacing ":weight 'normal" with ":weight +'medium" should fix the issue. + +--- +** Keymap descriptions by Help commands have changed. +'help--describe-command', 'C-h b' and associated functions that output +keymap descriptions have changed. In particular, prefix commands are +not output at all, and instead of "??" for closures/functions, these +functions output "[closure]"/"[lambda]". You can get back the old +behavior of including prefix commands by customizing the new option +'describe-bindings-show-prefix-commands' to a non-nil value. + +--- +** 'downcase' details have changed slightly. +In certain locales, changing the case of an ASCII-range character may +turn it into a multibyte character, most notably with "I" in Turkish +(the lowercase is "ı", 0x0131). Previously, 'downcase' on a unibyte +string was buggy, and would mistakenly just return the lower byte of +this, 0x31 (the digit "1"). 'downcase' on a unibyte string has now +been changed to downcase such characters as if they were ASCII. To +get proper locale-dependent downcasing, the string has to be converted +to multibyte first. (This goes for the other case-changing functions, +too.) + +--- +** Functions in 'tramp-foreign-file-name-handler-alist' have changed. +Functions to determine which Tramp file name handler to use are now +passed a file name in dissected form (via 'tramp-dissect-file-name') +instead of in string form. + +--- +** 'def' indentation changes. +In 'emacs-lisp-mode', forms with a symbol with a name that start with +"def" have been automatically indented as if they were 'defun'-like +forms, for instance: + + (defzot 1 + 2 3) + +This heuristic has now been removed, and all functions/macros that +want to be indented this way have to be marked with + + (declare (indent defun)) + +or the like. If the function/macro definition itself can't be +changed, the indentation can also be adjusted by saying something +like: + + (put 'defzot 'lisp-indent-function 'defun) + +--- +** The 'inhibit-changing-match-data' variable is now obsolete. +Instead, functions like 'string-match' and 'looking-at' now take an +optional INHIBIT-MODIFY argument. + +--- +** 'gnus-define-keys' is now obsolete. +Use 'define-keymap' instead. + +--- +** MozRepl has been removed from js.el. +MozRepl was removed from Firefox in 2017, so this code doesn't work +with recent versions of Firefox. + +--- +** The function 'image-dired-get-exif-data' is now obsolete. +Use 'exif-parse-file' and 'exif-field' instead. + +--- +** 'insert-directory' alternatives should not change the free disk space line. +This change is now applied in 'dired-insert-directory'. + +--- +** 'compilation-last-buffer' is (finally) declared obsolete. +It has been obsolete since Emacs 22.1, actually. + +--- +** Calling 'lsh' now elicits a byte-compiler warning. +'lsh' behaves in somewhat surprising and platform-dependent ways for +negative arguments, and is generally slower than 'ash', which should be +used instead. This warning can be suppressed by surrounding calls to +'lsh' with the construct '(with-suppressed-warnings ((suspicious lsh)) ...)', +but switching to 'ash' is generally much preferable. + +--- +** Some functions and variables obsolete since Emacs 24 have been removed: +'Buffer-menu-buffer+size-width', 'Electric-buffer-menu-mode', +'Info-edit-map', 'allout-abbreviate-flattened-numbering', +'allout-exposure-change-hook', 'allout-mode-deactivate-hook', +'allout-structure-added-hook', 'allout-structure-deleted-hook', +'allout-structure-shifted-hook', 'ansi-color-unfontify-region', +'archive-extract-hooks', 'auth-source-forget-user-or-password', +'auth-source-hide-passwords', 'auth-source-user-or-password', +'automatic-hscrolling', 'automount-dir-prefix', 'bibtex-complete', +'bibtex-entry-field-alist', 'buffer-has-markers-at', +'buffer-substring-filters', 'byte-compile-disable-print-circle', +'c-prepare-bug-report-hooks', 'cfengine-mode-abbrevs', +'change-log-acknowledgement', 'chart-map', +'checkdoc-comment-style-hooks', 'comint--unquote&expand-filename', +'comint-dynamic-complete', 'comint-dynamic-complete-as-filename', +'comint-dynamic-simple-complete', 'comint-unquote-filename', +'command-history-map', 'compilation-parse-errors-function', +'completion-annotate-function', 'condition-case-no-debug', +'count-lines-region', 'crisp-mode-modeline-string', +'custom-print-functions', 'cvs-string-prefix-p', 'data-debug-map', +'deferred-action-function', 'deferred-action-list', +'dired-pop-to-buffer', 'dired-shrink-to-fit', +'dired-sort-set-modeline', 'dired-x-submit-report', +'display-buffer-function', +'ediff-choose-window-setup-function-automatically', +'eieio-defgeneric', 'eieio-defmethod', 'emacs-lock-from-exiting', +'erc-complete-word', 'erc-dcc-chat-filter-hook', +'eshell-add-to-window-buffer-names', 'eshell-cmpl-suffix-list', +'eshell-for', 'eshell-remove-from-window-buffer-names', +'eshell-status-in-modeline', 'filesets-cache-fill-content-hooks', +'font-list-limit', 'font-lock-maximum-size', +'font-lock-reference-face', 'gnus-carpal', +'gnus-debug-exclude-variables', 'gnus-debug-files', +'gnus-local-domain', 'gnus-outgoing-message-group', +'gnus-registry-user-format-function-M', 'gnus-secondary-servers', +'gnus-subscribe-newsgroup-hooks', 'gud-inhibit-global-bindings', +'hangul-input-method-inactivate', 'hfy-post-html-hooks', +'image-extension-data', 'image-library-alist', +'inactivate-current-input-method-function', 'inactivate-input-method', +'inhibit-first-line-modes-regexps', +'inhibit-first-line-modes-suffixes', 'input-method-inactivate-hook', +'intdos', 'javascript-generic-mode', 'javascript-generic-mode-hook', +'latex-string-prefix-p', 'macro-declaration-function' (function), +'macro-declaration-function' (variable), 'mail-complete', +'mail-complete-function', 'mail-mailer-swallows-blank-line', +'mail-sent-via', 'make-register', 'makefile-complete', +'menu-bar-kill-ring-save', 'meta-complete-symbol', 'meta-mode-map', +'mh-kill-folder-suppress-prompt-hooks', +'minibuffer-completing-symbol', +'minibuffer-local-filename-must-match-map', 'mode25', 'mode4350', +'mpc-string-prefix-p', 'msb-after-load-hooks', +'nndiary-request-accept-article-hooks', +'nndiary-request-create-group-hooks', +'nndiary-request-update-info-hooks', 'nnimap-split-rule', +'nntp-authinfo-file', 'ns-alternatives-map', +'ns-store-cut-buffer-internal', 'package-menu-view-commentary', +'pascal-last-completions', 'pascal-show-completions', +'pascal-toggle-completions', 'pcomplete-arg-quote-list', +'pcomplete-quote-argument', 'prolog-char-quote-workaround', +'python-buffer', 'python-guess-indent', 'python-indent', +'python-info-ppss-comment-or-string-p', 'python-info-ppss-context', +'python-info-ppss-context-type', 'python-preoutput-result', +'python-proc', 'python-send-receive', 'python-send-string', +'python-use-skeletons', 'quail-inactivate', 'quail-inactivate-hook', +'query-replace-interactive', 'rcirc-activity-hooks', +'rcirc-print-hooks', 'rcirc-receive-message-hooks', +'rcirc-sentinel-hooks', 'read-filename-at-point', 'redraw-modeline', +'reftex-index-map', 'reftex-index-phrases-map', +'reftex-select-bib-map', 'reftex-select-label-map', 'reftex-toc-map', +'register-name-alist', 'register-value', 'report-emacs-bug-info', +'report-emacs-bug-pretest-address', +'rmail-default-dont-reply-to-names', 'rmail-dont-reply-to', +'rmail-dont-reply-to-names', 'robin-inactivate', +'robin-inactivate-hook', 'rst-block-face', 'rst-comment-face', +'rst-definition-face', 'rst-directive-face', 'rst-emphasis1-face', +'rst-emphasis2-face', 'rst-external-face', 'rst-literal-face', +'rst-reference-face', 'semantic-change-hooks', +'semantic-edits-delete-change-hooks', +'semantic-edits-new-change-hooks', +'semantic-edits-reparse-change-hooks', 'semantic-grammar-map', +'semantic-grammar-syntax-table', 'semantic-lex-reset-hooks', +'semanticdb-elisp-sym-function-arglist', +'semanticdb-save-database-hooks', 'set-face-underline-p', +'set-register-value', 'sh-maybe-here-document', 'speedbar-key-map', +'speedbar-syntax-table', 'starttls-any-program-available', +'strokes-modeline-string', 'strokes-report-bug', +'term-default-bg-color', 'term-default-fg-color', +'tex-string-prefix-p', 'timeclock-modeline-display', +'timeclock-modeline-display', 'timeclock-update-modeline', +'toggle-emacs-lock', 'tooltip-use-echo-area', 'turn-on-cwarn-mode', +'turn-on-iimage-mode', 'ucs-input-inactivate', 'ucs-insert', +'url-recreate-url-attributes', 'user-variable-p', +'vc-string-prefix-p', 'vc-toggle-read-only', 'view-return-to-alist', +'view-return-to-alist-update', 'w32-default-color-map' (function), +'which-func-mode' (function), 'window-system-version', +'winner-mode-leave-hook', 'x-cut-buffer-or-selection-value'. + +--- +** Some functions and variables obsolete since Emacs 23 have been removed: +'find-emacs-lisp-shadows', 'newsticker-cache-filename', +'process-filter-multibyte-p', 'redisplay-end-trigger-functions', +'set-process-filter-multibyte', 'set-window-redisplay-end-trigger', +'unify-8859-on-decoding-mode', 'unify-8859-on-encoding-mode', +'vc-arch-command', 'window-redisplay-end-trigger', 'x-selection'. + +--- +** Some functions and variables obsolete since Emacs 21 or 22 have been removed: +'c-toggle-auto-state', 'find-file-not-found-hooks', +'ls-lisp-dired-ignore-case', 'query-replace-regexp-eval'. + ++++ +** New generic function 'function-documentation'. +It can dynamically generate a raw docstring depending on the type of a +function. Used mainly for docstrings of OClosures. + ++++ +** Base64 encoding no longer tolerates latin-1 input. +The functions 'base64-encode-string', 'base64url-encode-string', +'base64-encode-region' and 'base64url-encode-region' no longer accept +characters in the range U+0080..U+00FF as substitutes for single bytes +in the range 128..255, but signal an error for all multibyte characters. +The input must be unibyte encoded text. + ++++ +** The 'clone-indirect-buffer-hook' is now run by 'make-indirect-buffer'. +It was previously only run by 'clone-indirect-buffer' and +'clone-indirect-buffer-other-window'. Since 'make-indirect-buffer' is +called by both of these, the hook is now run by all 3 of these +functions. + +--- +** '?\' at the end of a line now signals an error. +Previously, it produced a nonsense value, -1, that was never intended. + +--- +** Some libraries obsolete since Emacs 24.1 and 24.3 have been removed: +abbrevlist.el, assoc.el, complete.el, cust-print.el, +erc-hecomplete.el, mailpost.el, mouse-sel.el, old-emacs-lock.el, +patcomp.el, pc-mode.el, pc-select.el, s-region.el, and sregex.el. + ++++ +** Many seldom-used generalized variables have been made obsolete. +Emacs has a number of rather obscure generalized variables defined, +that, for instance, allowed you to say things like: + + (setf (point-min) 4) + +These never caught on and have been made obsolete. The form above, +for instance, is the same as saying + + (narrow-to-region 4 (point-max)) + +The following generalized variables have been made obsolete: +'buffer-file-name', 'buffer-local-value', 'buffer-modified-p', +'buffer-name', 'buffer-string', 'buffer-substring', 'current-buffer', +'current-column', 'current-global-map', 'current-input-mode', +'current-local-map', 'current-window-configuration', +'default-file-modes', 'documentation-property', 'eq', 'frame-height', +'frame-width', 'frame-visible-p', 'global-key-binding', +'local-key-binding', 'mark', 'mark-marker', 'marker-position', +'mouse-position', 'point', 'point-marker', 'point-max', 'point-min', +'read-mouse-position', 'screen-height', 'screen-width', +'selected-frame', 'selected-screen', 'selected-window', +'standard-case-table', 'syntax-table', 'visited-file-modtime', +'window-height', 'window-width', and 'x-get-secondary-selection'. + + +* Lisp Changes in Emacs 29.1 + ++++ +** Interpreted closures are "safe for space". +As was already the case for byte-compiled closures, instead of capturing +the whole current lexical environment, interpreted closures now only +capture the part of the environment that they need. +The previous behavior could occasionally lead to memory leaks or +to problems where a printed closure would not be 'read'able because +of an un'read'able value in an unrelated lexical variable. + ++++ +** New accessor function 'file-attribute-file-identifier'. +It returns the list of the inode number and device identifier +retrieved by 'file-attributes'. This value can be used to identify a +file uniquely. The device identifier can be a single number or (for +remote files) a cons of 2 numbers. + ++++ +** New macro 'while-let'. +This is like 'when-let', but repeats until a binding form is nil. + ++++ +** New function 'make-obsolete-generalized-variable'. +This can be used to mark setters used by 'setf' as obsolete, and the +byte-compiler will then warn about using them. + ++++ +** New functions 'pos-eol' and 'pos-bol'. +These are like 'line-end-position' and 'line-beginning-position' +(respectively), but ignore fields (and are more efficient). + ++++ +** New function 'compiled-function-p'. +This returns non-nil if its argument is either a built-in, or a +byte-compiled, or a natively-compiled function object, or a function +loaded from a dynamic module. + +--- +** 'deactivate-mark' can have new value 'dont-save'. +This value means that Emacs should deactivate the mark as usual, but +without setting the primary selection, if 'select-active-regions' is +enabled. + ++++ +** New 'declare' form 'interactive-args'. +This can be used to specify what forms to put into 'command-history' +when executing commands interactively. + ++++ +** The FORM argument of 'time-convert' is mandatory. +'time-convert' can still be called without it, as before, but the +compiler now emits a warning about this deprecated usage. + ++++ +** Emacs now supports user-customizable and themable icons. +These can be used for buttons in buffers and the like. See the +"(elisp) Icons" and "(emacs) Icons" nodes in the manuals for details. + ++++ +** New arguments MESSAGE and TIMEOUT of 'set-transient-map'. +MESSAGE specifies a message to display after activating the transient +map, including a special formatting spec to list available keys. +TIMEOUT is the idle time after which to deactivate the transient map. +The default timeout value can be defined by the new variable +'set-transient-map-timeout'. + ++++ +** New forms 'with-restriction' and 'without-restriction'. +These forms can be used as enhanced alternatives to the +'save-restriction' form combined with, respectively, +'narrow-to-region' and 'widen'. They also accept an optional label +argument, with which labeled narrowings can be created and lifted. +See the "(elisp) Narrowing" node for details. + +** Connection Local Variables + ++++ +*** Some connection-local variables are now user options. +The variables 'connection-local-profile-alist' and +'connection-local-criteria-alist' are now user options, in order to +make it more convenient to inspect and modify them. + ++++ +*** New function 'connection-local-update-profile-variables'. +This function allows to modify the settings of an existing +connection-local profile. + ++++ +*** New macro 'with-connection-local-application-variables'. +This macro works like 'with-connection-local-variables', but it allows +to use another application but 'tramp'. This is useful when running +code in a buffer where Tramp has already set some connection-local +variables. + ++++ +*** New macro 'setq-connection-local'. +This allows dynamically setting variable values for a particular +connection within the body of 'with-connection-local-{application-}variables'. +See the "(elisp) Connection Local Variables" node in the Lisp +Reference manual for more information. + ++++ +** 'plist-get', 'plist-put' and 'plist-member' are no longer limited to 'eq'. +These function now take an optional comparison PREDICATE argument. + ++++ +** 'read-multiple-choice' can now use long-form answers. + ++++ +** 'M-s c' in 'read-regexp' now toggles case folding. + ++++ +** 'completing-read' now allows a function as its REQUIRE-MATCH argument. +This function is called to see whether what the user has typed is a +match. This is also available from functions that call +'completing-read', like 'read-file-name'. + ++++ +** 'posn-col-row' can now give position data based on windows. +Previously, it reported data only based on the frame. + ++++ +** 'file-expand-wildcards' can now also take a regexp as PATTERN argument. + +--- +** vc-mtn (the VC backend for Monotone) has been made obsolete. + ++++ +** 'gui-set-selection' can specify different values for different data types. +If DATA is a string, then its text properties are searched for values +for each specific data type while the selection is being converted. + +--- +** New eldoc function 'elisp-eldoc-var-docstring-with-value'. +This function includes the current value of the variable in eldoc display +and can be used as a more detailed alternative to 'elisp-eldoc-var-docstring'. + ++++ +** 'save-some-buffers' can now be extended to save other things. +Traditionally, 'save-some-buffers' saved buffers, and also saved +abbrevs. This has been generalized via the +'save-some-buffers-functions' variable, and packages can now register +things to be saved. + ++++ +** New function 'string-equal-ignore-case'. +This compares strings ignoring case differences. + ++++ +** 'symbol-file' can now report natively-compiled ".eln" files. +If Emacs was built with native-compilation enabled, Lisp programs can +now call 'symbol-file' with the new optional 3rd argument non-nil to +request the name of the ".eln" file which defined a given symbol. + ++++ +** New macro 'with-memoization' provides a very primitive form of memoization. + ++++ +** 'max-char' can now report the maximum codepoint according to Unicode. +When called with a new optional argument UNICODE non-nil, 'max-char' +will now report the maximum valid codepoint defined by the Unicode +Standard. + +** Seq + ++++ +*** New function 'seq-split'. +This returns a list of sub-sequences of the specified sequence. + ++++ +*** New function 'seq-remove-at-position'. +This function returns a copy of the specified sequence where the +element at a given (zero-based) index got removed. + ++++ +*** New function 'seq-positions'. +This returns a list of the (zero-based) indices of elements matching a +given predicate in the specified sequence. + ++++ +*** New function 'seq-keep'. +This is like 'seq-map', but removes all nil results from the returned +list. + +** Themes + +--- +*** New hooks 'enable-theme-functions' and 'disable-theme-functions'. +These are run after enabling and disabling a theme, respectively. + +--- +*** Themes can now be made obsolete. +Using 'make-obsolete' on a theme is now supported. This will make +'load-theme' issue a warning when loading the theme. + ++++ +** New hook 'display-monitors-changed-functions'. +It is called whenever the configuration of different monitors on a +display changes. + ++++ +** 'prin1' and 'prin1-to-string' now take an optional OVERRIDES argument. +This argument can be used to override values of print-related settings. + ++++ +** New minor mode 'header-line-indent-mode'. +This is meant to be used by Lisp programs that show a header line +which should be kept aligned with the buffer contents when the user +switches 'display-line-numbers-mode' on or off, and when the width of +line-number display changes. See the "(elisp) Header Lines" node in +the Emacs Lisp Reference manual for more information. + ++++ +** New global minor mode 'lost-selection-mode'. +This global minor mode makes Emacs deactivate the mark in all buffers +when the primary selection is obtained by another program. + +--- +** On X, Emacs will try to preserve selection ownership when a frame is deleted. +This means that if you make Emacs the owner of a selection, such as by +selecting some text into the clipboard or primary selection, and then +delete the current frame, you will still be able to insert the +contents of that selection into other programs as long as another +frame is open on the same display. This behavior can be disabled by +setting the user option 'x-auto-preserve-selections' to nil. + ++++ +** New predicate 'char-uppercase-p'. +This returns non-nil if its argument its an uppercase character. + +** Byte Compilation + +--- +*** Byte compilation will now warn about some quoting mistakes in docstrings. +When writing code snippets that contains the "'" character (APOSTROPHE), +that quote character has to be escaped to avoid Emacs displaying it as +"’" (LEFT SINGLE QUOTATION MARK), which would make code examples like + + (setq foo '(1 2 3)) + +invalid. Emacs will now warn during byte compilation if it seems +something like that, and also warn about when using RIGHT/LEFT SINGLE +QUOTATION MARK directly. In both these cases, if these characters +should really be present in the docstring, they should be quoted with +"\=". + +--- +*** Byte compilation will now warn about some malformed 'defcustom' types. +It is very common to write 'defcustom' types on the form: + + :type '(choice (const :tag "foo" 'bar)) + +I.e., double-quoting the 'bar', which is almost never the correct +value. The byte compiler will now issue a warning if it encounters +these forms. + ++++ +** 'restore-buffer-modified-p' can now alter buffer auto-save state. +With a FLAG value of 'autosaved', it will mark the buffer as having +been auto-saved since the time of last modification. + +--- +** New minor mode 'isearch-fold-quotes-mode'. +This sets up 'search-default-mode' so that quote characters are +char-folded into each other. It is used, by default, in "*Help*" and +"*info*" buffers. + ++++ +** New macro 'buffer-local-set-state'. +This is a helper macro to be used by minor modes that wish to restore +buffer-local variables back to their original states when the mode is +switched off. + +--- +** New macro 'with-buffer-unmodified-if-unchanged'. +If the buffer is marked as unmodified, and code does modifications +that, in total, means that the buffer is identical to the buffer +before, mark the buffer as unmodified again. + +--- +** New function 'malloc-trim'. +This function allows returning unused memory back to the operating +system, and is mainly meant as a debugging tool. It is currently +available only when Emacs was built with glibc as the C library. + +--- +** 'x-show-tip' no longer hard-codes a timeout default. +The new variable 'x-show-tooltip-timeout' allows the user to alter +this for packages that don't use 'tooltip-show', but instead call the +lower level function directly. + +--- +** New function 'current-cpu-time'. +It gives access to the CPU time used by the Emacs process, for +example for benchmarking purposes. + +--- +** New function 'string-edit'. +This is meant to be used when the user has to edit a (potentially) +long string. It pops up a new buffer where you can edit the string, +and a callback is called when the user types 'C-c C-c'. + ++++ +** New function 'read-string-from-buffer'. +This is a modal version of 'string-edit', and can be used as an +alternative to 'read-string'. + ++++ +** The return value of 'clear-message-function' is not ignored anymore. +If the function returns 'dont-clear-message', then the message is not +cleared, with the assumption that the function cleared it itself. + ++++ +** The local variables section now supports defining fallback modes. +This was previously only available when using a property line (i.e., +putting the modes on the first line of a file). + ++++ +** New function 'flush-standard-output'. +This enables display of lines that don't end in a newline from +batch-based Emacs scripts. + ++++ +** New convenience function 'buttonize-region'. +This works like 'buttonize', but for a region instead of a string. + ++++ +** 'macroexp-let2*' can omit TEST argument and use single-var bindings. + ++++ +** New macro-writing macros, 'cl-with-gensyms' and 'cl-once-only'. +See the "(cl) Macro-Writing Macros" manual section for descriptions. + ++++ +** New variable 'last-event-device' and new function 'device-class'. +On X Windows, 'last-event-device' specifies the input extension device +from which the last input event originated, and 'device-class' can be +used to determine the type of an input device. + ++++ +** Variable 'track-mouse' can have a new value 'drag-source'. +This means the same as 'dropping', but modifies the mouse position +list in reported motion events if there is no frame underneath the +mouse pointer. + ++++ +** New functions for dragging items from Emacs to other programs. +The new functions 'x-begin-drag', 'dnd-begin-file-drag', +'dnd-begin-drag-files', and 'dnd-direct-save' allow dragging contents +(such as files and text) from Emacs to other programs. + +--- +** New function 'ietf-drums-parse-date-string'. +This function parses RFC5322 (and RFC822) date strings, and should be +used instead of 'parse-time-string' when parsing data that's standards +compliant. + ++++ +** New macro 'setopt'. +This is like 'setq', but is meant to be used for user options instead +of plain variables, and uses 'custom-set'/'set-default' to set them. + ++++ +** New utility predicate 'mode-line-window-selected-p'. +This is meant to be used from ':eval' mode line constructs to create +different mode line looks for selected and unselected windows. + ++++ +** New variable 'messages-buffer-name'. +This variable (defaulting to "*Messages*") allows packages to override +where messages are logged. + ++++ +** New function 'readablep'. +This function says whether an object can be written out and then +read back by the Emacs Lisp reader. + ++++ +** New variable 'print-unreadable-function'. +This variable allows changing how Emacs prints unreadable objects. + +--- +** The user option 'polling-period' now accepts floating point values. +This means Emacs can now poll for input during Lisp execution more +frequently than once in a second. + +--- +** New function 'bidi-string-strip-control-characters'. +This utility function is meant for displaying strings when it is +essential that there's no bidirectional context. It removes all the +bidirectional formatting control characters (such as RLM, LRO, PDF, +etc.) from its argument string. The characters it removes are listed +in the value of 'bidi-control-characters'. + +--- +** The Gnus range functions have been moved to a new library, range.el. +All the old names have been made obsolete. + ++++ +** New function 'function-alias-p'. +This predicate says whether an object is a function alias, and if it +is, the alias chain is returned. + ++++ +** New variable 'lisp-directory' holds the directory of Emacs's own Lisp files. + ++++ +** New facility for handling session state: 'multisession-value'. +This can be used as a convenient way to store (simple) application +state, and the command 'list-multisession-values' allows users to list +(and edit) this data. + ++++ +** New function 'get-display-property'. +This is like 'get-text-property', but works on the 'display' text +property. + ++++ +** New function 'add-display-text-property'. +This is like 'put-text-property', but works on the 'display' text +property. + ++++ +** New 'min-width' 'display' property. +This allows setting a minimum display width for a region of text. + ++++ +** New 'cursor-face' text property. +This uses 'cursor-face' instead of the default face when cursor is on or +near the character and 'cursor-face-highlight-mode' is enabled. The +user option 'cursor-face-highlight-nonselected-window' is similar to +'highlight-nonselected-windows', but for this property. + ++++ +** New event type 'touch-end'. +This event is sent whenever the user's finger moves off the mouse +wheel on some mice, or when the user's finger moves off the touchpad. + ++++ +** New event type 'pinch'. +This event is sent when a user performs a pinch gesture on a touchpad, +which is comprised of placing two fingers on the touchpad and moving +them towards or away from each other. + ++++ +** New hook 'x-pre-popup-menu-hook'. +This hook, run before 'x-popup-menu', is about to display a +deck-of-cards menu on screen. + +--- +** New hook 'post-select-region-hook'. +This hook is run immediately after 'select-active-regions'. It causes +the region to be set as the primary selection. + ++++ +** New function 'buffer-match-p'. +Check if a buffer satisfies some condition. Some examples for +conditions can be regular expressions that match a buffer name, a +cons-cell like '(major-mode . shell-mode)' that matches any buffer +where 'major-mode' is 'shell-mode' or a combination with a condition +like '(and "\\`\\*.+\\*\\'" (major-mode . special-mode))'. + ++++ +** New function 'match-buffers'. +It uses 'buffer-match-p' to gather a list of buffers that match a +condition. + +--- +** New optional arguments TEXT-FACE and DEFAULT-FACE for 'tooltip-show'. +They allow changing the faces used for the tooltip text and frame +colors of the resulting tooltip frame from the default 'tooltip' face. + +** Text Security and Suspiciousness + ++++ +*** New library textsec.el. +This library contains a number of checks for whether a string is +"suspicious". This usually means that the string contains characters +that have glyphs that can be confused with other, more commonly used +glyphs, or contains bidirectional (or other) formatting characters +that may be used to confuse a user. + ++++ +*** New user option 'textsec-check'. +If non-nil (which is the default), Emacs packages that are vulnerable +to attackers trying to confuse the users will use the textsec library +to mark suspicious text. For instance shr/eww will mark suspicious +URLs and links, Gnus will mark suspicious From addresses, and +Message mode will query the user if the user is sending mail to a +suspicious address. If this variable is nil, these checks are +disabled. + ++++ +*** New function 'textsec-suspicious-p'. +This is the main function Emacs applications should be using to check +whether a string is suspicious. It heeds the 'textsec-check' user +option. + +** Keymaps and Key Definitions + ++++ +*** 'where-is-internal' can now filter events marked as non key events. +If a command maps to a key binding like '[some-event]', and 'some-event' +has a symbol plist containing a non-nil 'non-key-event' property, then +that binding is ignored by 'where-is-internal'. + ++++ +*** New functions for defining and manipulating keystrokes. +These all take the syntax defined by 'key-valid-p', which is basically +the same syntax as the one accepted by the 'kbd' macro. None of the +older functions have been deprecated or altered, but they are now +de-emphasized in the documentation, and we encourage Lisp programs to +switch to these new functions. + ++++ +*** Use 'keymap-set' instead of 'define-key'. + ++++ +*** Use 'keymap-global-set' instead of 'global-set-key'. + ++++ +*** Use 'keymap-local-set' instead of 'local-set-key'. + ++++ +*** Use 'keymap-global-unset' instead of 'global-unset-key'. + ++++ +*** Use 'keymap-local-unset' instead of 'local-unset-key'. + ++++ +*** Use 'keymap-substitute' instead of 'substitute-key-definition'. + ++++ +*** Use 'keymap-set-after' instead of 'define-key-after'. + ++++ +*** Use 'keymap-lookup' instead of 'lookup-key' and 'key-binding'. + ++++ +*** Use 'keymap-local-lookup' instead of 'local-key-binding'. + ++++ +*** Use 'keymap-global-lookup' instead of 'global-key-binding'. + ++++ +*** 'define-key' now takes an optional REMOVE argument. +If non-nil, remove the definition from the keymap. This is subtly +different from setting a definition to nil (when the keymap has a +parent). + ++++ +*** 'read-multiple-choice' now takes an optional SHOW-HELP argument. +If non-nil, show the help buffer immediately, before any user input. + ++++ +*** New function 'key-valid-p'. +The 'kbd' function is quite permissive, and will try to return +something usable even if the syntax of the argument isn't completely +correct. The 'key-valid-p' predicate does a stricter check of the +syntax. + +--- +*** New function 'key-parse'. +This is like 'kbd', but only returns vectors instead of a mix of +vectors and strings. + ++++ +*** New ':type' for 'defcustom' for keys. +The new 'key' type can be used for options that should be a valid key +according to 'key-valid-p'. The type 'key-sequence' is now obsolete. + ++++ +** New function 'define-keymap'. +This function allows defining a number of keystrokes with one form. + ++++ +** New macro 'defvar-keymap'. +This macro allows defining keymap variables more conveniently. + +** 'defvar-keymap' can specify 'repeat-mode' behavior for the keymap. +Use ':repeat t' to have all bindings be repeatable or for more +advanced usage: + + :repeat (:enter (commands ...) :exit (commands ...)) + +--- +** 'kbd' can now be used in built-in, preloaded libraries. +It no longer depends on edmacro.el and cl-lib.el. + ++++ +** New substitution in docstrings and 'substitute-command-keys'. +Use \\`KEYSEQ' to insert a literal key sequence "KEYSEQ" (for example +\\`C-k') in a docstring or when calling 'substitute-command-keys', +which will use the same face as a command substitution. This should +be used only when a key sequence has no corresponding command, for +example when it is read directly with 'read-key-sequence'. It must be +a valid key sequence according to 'key-valid-p'. + +--- +** 'lookup-key' is more permissive when searching for extended menu items. +In Emacs 28.1, the behavior of 'lookup-key' was changed: when looking +for a menu item '[menu-bar Foo-Bar]', first try to find an exact +match, then look for the lowercased '[menu-bar foo-bar]'. + +This has been extended, so that when looking for a menu item with a +symbol containing spaces, as in '[menu-bar Foo\ Bar]', first look for +an exact match, then the lowercased '[menu-bar foo\ bar]' and finally +'[menu-bar foo-bar]'. This further improves backwards-compatibility +when converting menus to use 'easy-menu-define'. + ++++ +** New function 'file-name-split'. +This returns a list of all the components of a file name. + ++++ +** New function 'file-name-parent-directory'. +This returns the parent directory of a file name. + ++++ +** New macro 'with-undo-amalgamate'. +It records a particular sequence of operations as a single undo step. + ++++ +** New command 'yank-media'. +This command supports yanking non-plain-text media like images and +HTML from other applications into Emacs. It is only supported in +modes that have registered support for it, and only on capable +platforms. + ++++ +** New command 'yank-media-types'. +This command lets you examine all data in the current selection and +the clipboard, and insert it into the buffer. + ++++ +** New variable 'yank-transform-functions'. +This variable allows the user to alter the string to be inserted. + +--- +** New command 'yank-in-context'. +This command tries to preserve string/comment syntax when yanking. + +--- +** New function 'minibuffer-lazy-highlight-setup'. +This function allows setting up the minibuffer so that lazy +highlighting of its content is applied in the original window. + ++++ +** New text property 'inhibit-isearch'. +If set, 'isearch' will skip these areas, which can be useful (for +instance) when covering huge amounts of data (that has no meaningful +searchable data, like image data) with a 'display' text property. + ++++ +** 'insert-image' now takes an INHIBIT-ISEARCH optional argument. +It marks the image with the 'inhibit-isearch' text property, which +inhibits 'isearch' matching the STRING argument. + +--- +** New variable 'replace-regexp-function'. +Function to call to convert the entered FROM string to an Emacs +regexp in 'query-replace' and similar commands. It can be used to +implement a different regexp syntax for search/replace. + +--- +** New variables to customize defaults of FROM for 'query-replace*' commands. +The new variable 'query-replace-read-from-default' can be set to a +function that returns the default value of FROM when 'query-replace' +prompts for a string to be replaced. An example of such a function is +'find-tag-default'. + +The new variable 'query-replace-read-from-regexp-default' can be set +to a function (such as 'find-tag-default-as-regexp') that returns the +default value of FROM when 'query-replace-regexp' prompts for a regexp +whose matches are to be replaced. If these variables are nil (which +is the default), 'query-replace' and 'query-replace-regexp' take the +default value from the previous FROM-TO pair. + +** Lisp pretty-printer ('pp') + +--- +*** New function 'pp-emacs-lisp-code'. +'pp' formats general Lisp sexps. This function does much the same, +but applies formatting rules appropriate for Emacs Lisp code. Note +that this could currently be quite slow, and is thus appropriate only +for relatively small code fragments. + +--- +*** New user option 'pp-use-max-width'. +If non-nil, 'pp' and all 'pp-*' commands that format the results, will +attempt to limit the line length when formatting long lists and +vectors. This uses 'pp-emacs-lisp-code', and thus could be slow for +large lists. + ++++ +** New function 'file-has-changed-p'. +This convenience function is useful when writing code that parses +files at run-time, and allows Lisp programs to re-parse files only +when they have changed. + ++++ +** 'abbreviate-file-name' now respects magic file name handlers. + +--- +** New function 'font-has-char-p'. +This can be used to check whether a specific font has a glyph for a +character. + ++++ +** 'window-text-pixel-size' now accepts a new argument IGNORE-LINE-AT-END. +This controls whether or not the last screen line of the text being +measured will be counted for the purpose of calculating the text +dimensions. + ++++ +** 'window-text-pixel-size' understands a new meaning of FROM. +Specifying a cons as the FROM argument allows to start measuring text +from a specified amount of pixels above or below a position. + ++++ +** 'window-body-width' and 'window-body-height' can use remapped faces. +Specifying 'remap' as the PIXELWISE argument now checks if the default +face was remapped, and if so, uses the remapped face to determine the +character width/height. + ++++ +** 'set-window-vscroll' now accepts a new argument PRESERVE-VSCROLL-P. +This means the vscroll will not be reset when set on a window that is +"frozen" due to a mini-window being resized. + +** XDG Support + +--- +*** New function 'xdg-state-home'. +It returns the new 'XDG_STATE_HOME' environment variable. It should +point to a file name that "contains state data that should persist +between (application) restarts, but that is not important or portable +enough to the user that it should be stored in $XDG_DATA_HOME". +(This variable was introduced in the XDG Base Directory Specification +version 0.8 released on May 8, 2021.) + +--- +*** New function 'xdg-current-desktop'. +It returns a list of strings, corresponding to the colon-separated +list of names in the 'XDG_CURRENT_DESKTOP' environment variable, which +identify the current desktop environment. +(This variable was introduced in XDG Desktop Entry Specification +version 1.2.) + +--- +*** New function 'xdg-session-type'. +It returns the 'XDG_SESSION_TYPE' environment variable. (This is not +part of any official standard; see the man page pam_systemd(8) for +more information.) + ++++ +** New macro 'with-delayed-message'. +This macro is like 'progn', but will output the specified message if +the body takes longer to execute than the specified timeout. + +--- +** New function 'funcall-with-delayed-message'. +This function is like 'funcall', but will output the specified message +if the function takes longer to execute than the specified timeout. + +** Locale + +--- +*** New variable 'current-locale-environment'. +This holds the value of the previous call to 'set-locale-environment'. + +--- +*** New macro 'with-locale-environment'. +This macro can be used to change the locale temporarily while +executing code. + +** Table + +--- +*** New user option 'table-latex-environment'. +This allows switching between "table" and "tabular". + +** Tabulated List Mode + ++++ +*** A column can now be set to an image descriptor. +The 'tabulated-list-entries' variable now supports using an image +descriptor, which means to insert an image in that column instead of +text. See the documentation string of that variable for details. + ++++ +** ':keys' in 'menu-item' can now be a function. +If so, it is called whenever the menu is computed, and can be used to +calculate the keys dynamically. + ++++ +** New major mode 'clean-mode'. +This is a new major mode meant for debugging. It kills absolutely all +local variables and removes overlays and text properties. + ++++ +** 'kill-all-local-variables' can now kill all local variables. +If given the new optional KILL-PERMANENT argument, it also kills +permanent local variables. + ++++ +** Third 'mapconcat' argument SEPARATOR is now optional. +An explicit nil always meant the empty string, now it can be left out. + ++++ +** New function 'image-at-point-p'. +This function returns t if point is on a valid image, and nil +otherwise. + ++++ +** New function 'buffer-text-pixel-size'. +This is similar to 'window-text-pixel-size', but can be used when the +buffer isn't displayed. + ++++ +** New function 'string-pixel-width'. +This returns the width of a string in pixels. This can be useful when +dealing with variable pitch fonts and glyphs that have widths that +aren't integer multiples of the default font. + ++++ +** New function 'string-glyph-split'. +This function splits a string into a list of strings representing +separate glyphs. This takes into account combining characters and +grapheme clusters, by treating each sequence of characters composed on +display as a single unit. + +** Xwidget + ++++ +*** The function 'make-xwidget' now accepts an optional RELATED argument. +This argument is used as another widget for the newly created WebKit +widget to share settings and subprocesses with. It must be another +WebKit widget. + ++++ +*** New function 'xwidget-perform-lispy-event'. +This function allows you to send events to xwidgets. Usually, some +equivalent of the event will be sent, but there is no guarantee of +what the widget will actually receive. + +On GTK+, only key and function key events are implemented. + ++++ +*** New function 'xwidget-webkit-load-html'. +This function is used to load HTML text into WebKit xwidgets +directly, in contrast to creating a temporary file to hold the +markup, and passing the URI of the file as an argument to +'xwidget-webkit-goto-uri'. + ++++ +*** New functions for performing searches on WebKit xwidgets. +Some new functions, such as 'xwidget-webkit-search', have been added +for performing searches on WebKit xwidgets. + ++++ +*** New function 'xwidget-webkit-back-forward-list'. +This function returns the history of page-loads in a WebKit xwidget. + ++++ +*** New function 'xwidget-webkit-estimated-load-progress'. +This function returns the estimated progress of page loading in a +WebKit xwidget. + ++++ +*** New function 'xwidget-webkit-stop-loading'. +This function terminates all data transfer during page loads in a +WebKit xwidget. + ++++ +*** 'load-changed' xwidget events are now more detailed. +In particular, they can now have different arguments based on the +state of the WebKit widget. 'load-finished' is sent when a load has +completed, 'load-started' when a load first starts, 'load-redirected' +after a redirect, and 'load-committed' when the WebKit widget first +commits to the load. + ++++ +*** New event type 'xwidget-display-event'. +These events are sent whenever an xwidget requests that Emacs displays +another xwidget. The only arguments to this event are the xwidget +that should be displayed, and the xwidget that asked to display it. + ++++ +*** New function 'xwidget-webkit-set-cookie-storage-file'. +This function is used to control where and if an xwidget stores +cookies set by web pages on disk. + +--- +** New variable 'help-buffer-under-preparation'. +This variable is bound to t during the preparation of a "*Help*" buffer. + ++++ +** Timestamps like '(1 . 1000)' now work without warnings being generated. +For example, '(time-add nil '(1 . 1000))' no longer warns that the +'(1 . 1000)' acts like '(1000 . 1000000)'. This warning, which was a +temporary transition aid for Emacs 27, has served its purpose. + ++++ +** 'encode-time' now also accepts a 6-element list with just time and date. +'(encode-time (list SECOND MINUTE HOUR DAY MONTH YEAR))' is now short for +'(encode-time (list SECOND MINUTE HOUR DAY MONTH YEAR nil -1 nil))'. + ++++ +** 'date-to-time' now accepts arguments that lack month, day, or time. +The function now assumes the earliest possible values if its argument +lacks month, day, or time. For example, (date-to-time "2021-12-04") +now assumes a time of "00:00" instead of signaling an error. + ++++ +** 'format-seconds' now allows suppressing zero-value trailing elements. +The new "%x" non-printing control character will suppress zero-value +elements that appear after "%x". + ++++ +** New events for taking advantage of touchscreen devices. +The events 'touchscreen-begin', 'touchscreen-update', and +'touchscreen-end' have been added to take better advantage of +touch-capable display panels. + ++++ +** New error symbol 'permission-denied'. +This is a subcategory of 'file-error', and is signaled when some file +operation fails because the OS doesn't allow Emacs to access a file or +a directory. + ++++ +** The ':underline' face attribute now accepts a new property. +The property ':position' now specifies the position of the underline +when used as part of a property list specification for the +':underline' attribute. + ++++ +** 'defalias' records a more precise history of definitions. +This is recorded in the 'function-history' symbol property. + +--- +** New hook 'save-place-after-find-file-hook'. +This is called at the end of 'save-place-find-file-hook'. + +--- +** 'indian-tml-base-table' no longer translates digits. +Use 'indian-tml-base-digits-table' if you want digits translation. + +--- +** 'indian-tml-itrans-v5-hash' no longer translates digits. +Use 'indian-tml-itrans-digits-v5-hash' if you want digits +translation. + ++++ +** 'shell-quote-argument' has a new optional argument POSIX. +This is useful when quoting shell arguments for a remote shell +invocation. Such shells are POSIX conformant by default. + ++++ +** 'make-process' can set connection type independently for input and output. +When calling 'make-process', communication via pty can be enabled +selectively for just input or output by passing a cons cell for +':connection-type', e.g. '(pipe . pty)'. When examining a process +later, you can determine whether a particular stream for a process +uses a pty by passing one of 'stdin', 'stdout', or 'stderr' as the +second argument to 'process-tty-name'. + ++++ +** 'signal-process' now consults the list 'signal-process-functions'. +This is to determine which function has to be called in order to +deliver the signal. This allows Tramp to send the signal to remote +asynchronous processes. The hitherto existing implementation has been +moved to 'internal-default-signal-process'. + ++++ +** Some system information functions honor remote systems now. +'list-system-processes' returns remote process IDs. +'memory-info' returns memory information of remote systems. +'process-attributes' expects a remote process ID. +This happens only when the current buffer's 'default-directory' is +remote. In order to preserve the old behavior, bind +'default-directory' to a local directory, like + + (let ((default-directory temporary-file-directory)) + (list-system-processes)) + ++++ +** New functions 'take' and 'ntake'. +'(take N LIST)' returns the first N elements of LIST; 'ntake' does +the same but works by modifying LIST destructively. + +--- +** 'string-split' is now an alias for 'split-string'. + ++++ +** 'format-spec' now accepts functions in the replacement. +The function is called only when used in the format string. This is +useful to avoid side-effects such as prompting, when the value is not +actually being used for anything. + ++++ +** The variable 'max-specpdl-size' has been made obsolete. +Now 'max-lisp-eval-depth' alone is used for limiting Lisp recursion +and stack usage. 'max-specpdl-size' is still present as a plain +variable for compatibility but its limiting powers have been taken away. + +** New function 'external-completion-table'. +This function returns a completion table designed to ease +communication between Emacs's completion facilities and external tools +offering completion services, particularly tools whose full working +set is too big to transfer to Emacs every time a completion is +needed. The table uses new 'external' completion style exclusively +and cannot work with regular styles such as 'basic' or 'flex'. + ++++ +** Magic file name handlers for 'make-directory-internal' are no longer needed. +Instead, Emacs uses the already-existing 'make-directory' handlers. + ++++ +** '(make-directory DIR t)' returns non-nil if DIR already exists. +This can let a caller know whether it created DIR. Formerly, +'make-directory's return value was unspecified. + + +* Changes in Emacs 29.1 on Non-Free Operating Systems + +** MS-Windows + +--- +*** Emacs now supports double-buffering on MS-Windows to reduce display flicker. +(This was supported on Free systems since Emacs 26.1.) + +To disable double-buffering (e.g., if it causes display problems), set +the frame parameter 'inhibit-double-buffering' to a non-nil value. +You can do that either by adding + + '(inhibit-double-buffering . t) + +to 'default-frame-alist', or by modifying the frame parameters of the +selected frame by evaluating + + (modify-frame-parameters nil '((inhibit-double-buffering . t))) + ++++ +*** Emacs now supports system dark mode. +On Windows 10 (version 1809 and higher) and Windows 11, Emacs will now +follow the system's dark mode: GUI frames use the appropriate light or +dark title bar and scroll bars, based on the user's Windows-wide color +settings. + +--- +*** Emacs now uses native image APIs to display some image formats. +On Windows 2000 and later, Emacs now defaults to using the native +image APIs for displaying the BMP, GIF, JPEG, PNG, and TIFF images. +This means Emacs on MS-Windows needs no longer use external image +support libraries to display those images. Other image types -- XPM, +SVG, and WEBP -- still need support libraries for Emacs to be able to +display them. + +The use of native image APIs is controlled by the variable +'w32-use-native-image-API', whose value now defaults to t on systems +where those APIs are available. + ++++ +*** Emacs now supports display of BMP images using native image APIs. +When 'w32-use-native-image-API' is non-nil, Emacs on MS-Windows now +has built-in support for displaying BMP images. + +--- +*** GUI Yes/No dialogs now include a "Cancel" button. +The "Cancel" button is in addition to "Yes" and "No", and is intended +to allow users to quit the dialog, as an equivalent of 'C-g' when Emacs +asks a yes/no question via the echo area. This is controlled by the +new variable 'w32-yes-no-dialog-show-cancel', by default t. Set it to +nil to get back the old behavior of showing a modal dialog with only +two buttons: "Yes" and "No". + +** Cygwin + +--- +*** 'process-attributes' is now implemented. + +** macOS + ++++ +*** The 'ns-popup-font-panel' command has been removed. +Use the general command 'M-x menu-set-font' instead. + + +---------------------------------------------------------------------- +This file is part of GNU Emacs. + +GNU Emacs is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +GNU Emacs is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. + + +Local variables: +coding: utf-8 +mode: outline +mode: emacs-news +paragraph-separate: "[ ]" +end: |