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@@ -6,1749 +6,677 @@ 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 25. +This file is about changes in Emacs version 26. See file HISTORY for a list of GNU Emacs versions and release dates. -See files NEWS.24, NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18, -and NEWS.1-17 for changes in older Emacs versions. +See files NEWS.25, NEWS.24, NEWS.23, NEWS.22, NEWS.21, NEWS.20, +NEWS.19, 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. - -* Changes in Emacs 25.2 -This is a bug-fix release with (almost) no new features. - ---- -** `find-library', `help-function-def' and `help-variable-def' now run -`find-function-after-hook'. - -+++ -*** New basic face 'fixed-pitch-serif', for a fixed-width font with serifs. -The Info-quoted and tex-verbatim faces now default to inheriting from it. +Temporary note: ++++ indicates that all necessary documentation updates are complete. + (This means all relevant manuals in doc/ AND lisp doc-strings.) +--- means no change in the manuals is needed. +When you add a new item, use the appropriate mark if you are sure it applies, -* Installation Changes in Emacs 25.1 - -** Building Emacs now requires C99 or later. - -** Building Emacs now requires GNU make, version 3.81 or later. - -** New configure option --with-cairo. -This builds Emacs with Cairo drawing. As a side effect, it provides -support for built-in printing, when Emacs was built with GTK+. -The Emacs Cairo drawing is experimental and still has some known -display problems. We encourage more testing of this build and -reporting any problems you find, but it is not recommended for -production. - -** New configure option --with-modules. -This enables support for loading dynamic modules; see below. - -** By default, Emacs no longer works on IRIX. We expect that Emacs -users are not affected by this, as SGI stopped supporting IRIX in -December 2013. If you are affected, please send a bug report. You -should be able to work around the problem either by porting the Emacs -undumping code to GCC under IRIX, or by configuring --with-wide-int, -or by sticking with Emacs 24.4. - -** The Emacs garbage collector assumes GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS. -The GC_MAKE_GCPROS_NOOPS stack-marking variant has been the default -since Emacs 24.4, and the other variants were undocumented and were -obstacles to maintenance and development. GC_MARK_STACK and its -related symbols have been removed from the C internals. - -** 'configure' now prefers gnustep-config when configuring GNUstep. -If gnustep-config is not available, the old heuristics are used. - -** 'configure' now prefers inotify to gfile for file notification, -unless gfile is explicitly requested via --with-file-notification='gfile'. - -** 'configure' detects the kqueue file notification library on *BSD -and Mac OS X machines. - -** The configure option '--with-pkg-config-prog' has been removed. -Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to. - -** The configure option '--with-mmdf' has been removed. -It was no longer useful, as it relied on libraries that are no longer -supported, and its presence led to confusion during configuration. -This affects only the 'movemail' utility; Emacs itself can still -process MMDF-format files as before. - -** The configure option '--enable-silent-rules' is now the default, -and silent rules are now quieter. To get the old behavior where -'make' chatters a lot, configure with '--disable-silent-rules' or -build with 'make V=1'. - -** The configure option '--with-gameuser' now allows you to specify a -group instead of a user if its argument is prefixed by ':' (a colon). -This will cause the game score files in "${localstatedir}/games/emacs" -to be owned by that group, and the helper program for updating them to -be installed setgid. The option now defaults to the 'games' group. +* Installation Changes in Emacs 26.1 -** The 'grep-changelog' script (and its manual page) are no longer included. -It has no particular connection to Emacs and has not changed in years, -so if you want to use it, you can always take a copy from an older Emacs. +** By default libgnutls is now required when building Emacs. +Use 'configure --with-gnutls=no' to build even when GnuTLS is missing. -** Emacs 25 comes with a new set of icons. -Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png. -The old Emacs logo icons are available as 'emacs23.png' in the same location. +** GnuTLS version 2.12.2 or later is now required, instead of merely +version 2.6.6 or later. -** New make target 'check-expensive' to run additional tests. -This includes all tests which run via "make check", plus additional -tests which take more time to perform. +** The new option 'configure --enable-gcc-warnings=warn-only' causes +GCC to issue warnings without stopping the build. This behavior is +now the default in developer builds. As before, use +'--disable-gcc-warnings' to suppress GCC's warnings, and +'--enable-gcc-warnings' to stop the build if GCC issues warnings. - -* Startup Changes in Emacs 25.1 - -** When Emacs is given a file as a command line argument and -'initial-buffer-choice' is non-nil, display both the file and -'initial-buffer-choice'. When Emacs is given more than one file and -'initial-buffer-choice' is non-nil, show 'initial-buffer-choice' -and '*Buffer List*'. This makes Emacs convenient to use from the -command line when 'initial-buffer-choice' is non-nil. - -** The value of 'initial-scratch-message' is now treated as a doc string -and can contain escape sequences for command keys, quotes, and the like. - -** The default height of GUI frames was enlarged. -This is so there's enough space in the initial window to display the -optional text about recovering crashes sessions, without losing the -splash image display. ++++ +** The Emacs server now has socket-launching support. This allows +socket based activation, where an external process like systemd can +invoke the Emacs server process upon a socket connection event and +hand the socket over to Emacs. Emacs uses this socket to service +emacsclient commands. This new functionality can be disabled with the +configure option '--disable-libsystemd'. + +** New configure option '--disable-build-details' attempts to build an +Emacs that is more likely to be reproducible; that is, if you build +and install Emacs twice, the second Emacs is a copy of the first. +Deterministic builds omit the build date from the output of the +emacs-version and erc-cmd-SV functions, and the leave the following +variables nil: emacs-build-system, emacs-build-time, +erc-emacs-build-time. + +** Emacs no longer works on IRIX. We expect that Emacs users are not +affected by this, as SGI stopped supporting IRIX in December 2013. -* Changes in Emacs 25.1 - -** Xwidgets: a new feature for embedding native widgets inside Emacs buffers. -If you have gtk3 and webkitgtk3 installed, and Emacs was built with -xwidget support, you can access the embedded webkit browser with 'M-x -xwidget-webkit-browse-url'. This opens a new buffer with the embedded -browser. The buffer will have a new mode, 'xwidget-webkit-mode' -(similar to 'image-mode'), which supports the webkit widget. - -*** New functions for xwidget-webkit mode 'xwidget-webkit-insert-string', -'xwidget-webkit-adjust-size-dispatch', 'xwidget-webkit-back', -'xwidget-webkit-browse-url', 'xwidget-webkit-reload', -'xwidget-webkit-current-url', 'xwidget-webkit-scroll-backward', -'xwidget-webkit-scroll-forward', 'xwidget-webkit-scroll-down', -'xwidget-webkit-scroll-up'. - -** Emacs can now load shared/dynamic libraries (modules). -A dynamic Emacs module is a shared library that provides additional -functionality for use in Emacs Lisp programs, just like a package -written in Emacs Lisp would. The functions 'load', 'require', -'load-file', etc. were extended to load such modules, as they do with -Emacs Lisp packages. The new variable 'module-file-suffix' holds the -system-dependent value of the file-name extension ('.so' on Posix -hosts) of the module files. - -A module should export a C-callable function named -'emacs_module_init', which Emacs will call as part of the call to -'load' or 'require' which loads the module. It should also export a -symbol named 'plugin_is_GPL_compatible' to indicate that its code is -released under the GPL or compatible license; Emacs will refuse to -load modules that don't export such a symbol. - -If a module needs to call Emacs functions, it should do so through the -API defined and documented in the header file 'emacs-module.h'. Note -that any module that provides Lisp-callable functions will have to use -Emacs functions such as 'fset' and 'funcall', in order to register its -functions with the Emacs Lisp interpreter. - -Modules can create 'user-ptr' Lisp objects that embed pointers to C -structs defined by the module. This is useful for keeping around -complex data structures created by a module, to be passed back to the -module's functions. User-ptr objects can also have associated -"finalizers" -- functions to be run when the object is GC'ed; this is -useful for freeing any resources allocated for the underlying data -structure, such as memory, open file descriptors, etc. A new -predicate 'user-ptrp' returns non-nil if its argument is a 'user-ptr' -object. - -Loadable modules in Emacs are an experimental feature, and subject to -change in future releases. For that reason, their support is disabled -by default, and must be enabled by using the '--with-modules' option -at configure time. - -** Network security (TLS/SSL certificate validity and the like) is -added via the new Network Security Manager (NSM) and controlled via -the 'network-security-level' variable. - -** 'C-h l' now also lists the commands that were run. - -** 'x-select-enable-clipboard' is renamed 'select-enable-clipboard' -and 'x-select-enable-primary' is renamed 'select-enable-primary'. -Additionally they both now apply to all systems (OSX, GNUstep, Windows, you -name it), with the proviso that on some systems (e.g. Windows) -'select-enable-primary' is ineffective since the system doesn't -have the equivalent of a primary selection. - -** New option 'switch-to-buffer-in-dedicated-window' allows you to -customize how 'switch-to-buffer' proceeds interactively when the -selected window is strongly dedicated to its buffer. - -** The option 'even-window-heights' has been renamed to -'even-window-sizes' and now handles window widths as well. - -** 'terpri' gets an optional arg ENSURE to conditionally output a newline. - -** 'insert-register' now leaves point after the inserted text -when called interactively. A prefix argument toggles this behavior. - -** The new variable 'term-file-aliases' replaces some files from lisp/term. -The function 'tty-run-terminal-initialization' consults this variable -when deciding what terminal-specific initialization code to run. - -** New variable 'system-configuration-features', listing some of the -main features that Emacs was compiled with. This is mainly intended -for use in Emacs bug reports. - -** A password is now hidden also when typed in batch mode. Another -hiding character but the default '.' can be used by let-binding the -variable 'read-hide-char'. - -** The Emacs pseudo-random number generator can be securely seeded. -On systems where Emacs can access the system entropy or some other -cryptographically secure random stream, it now uses that when 'random' -is called with its argument t. This allows cryptographically strong -random values; in particular, the Emacs server now uses this facility -to produce its authentication key. - -** New input methods: 'tamil-dvorak', 'programmer-dvorak' and 'probhat'. +* Startup Changes in Emacs 26.1 -* Editing Changes in Emacs 25.1 - -** 'M-x' suggests shorthands and ignores obsolete commands for completion. - -** Changes in undo - -*** Successive single-char deletions are collapsed in the undo-log just like -successive char insertions. Which commands invoke this behavior is -controlled by the new 'undo-auto-amalgamate' function. See the node -"Undo" in the ELisp manual for more details. - -*** The heuristic used to insert 'undo-boundary' after each command -has changed, so that if a command causes changes in more than just the -current buffer, Emacs now calls 'undo-boundary' in every buffer -affected by the command. - -** New command 'comment-line' bound to 'C-x C-;'. - -** New and improved facilities for inserting Unicode characters - -*** Unicode names entered via 'C-x 8 RET' now use substring completion -by default. - -*** 'C-x 8' now has shorthands for several chars, such as U+2010 -(HYPHEN), U+2011 (NON-BREAKING HYPHEN), and U+2012 (FIGURE DASH). As -before, you can type 'C-x 8 C-h' to list shorthands. - -*** New minor mode 'electric-quote-mode' for using curved quotes as you -type. See also the new variable 'text-quoting-style'. - -** New minor mode 'global-eldoc-mode' is enabled by default. - -** Emacs now uses "bracketed paste mode" on text terminals that support it. -Bracketed paste mode causes text terminals to wrap pasted text in special -escape sequences that allow Emacs to tell the difference between text -you type and text you paste from other applications. Emacs then -avoids interpreting each character in the pasted text as it does with -keyboard input, which results in a paste experience similar to that -under a window system, and significant performance improvements when -pasting large amounts of text. - -Bracketed paste mode is disabled by default, so Emacs automatically -enables it at startup if the terminal supports it. - -** Emacs now supports the latest version of the UBA. -The Emacs implementation of the Unicode Bidirectional Algorithm (UBA) -was updated to support all the latest additions and changes introduced -in Unicode Standard versions 6.3, 7.0, and the latest Unicode 8.0. -This includes full support for directional isolates and the -Bidirectional Parentheses Algorithm (BPA) specified by these Unicode -standards. - -** You can access 'mouse-buffer-menu' ('C-down-mouse-1') using 'C-f10'. +* Changes in Emacs 26.1 -** New buffer-local 'electric-pair-local-mode'. - -** New variable 'fast-but-imprecise-scrolling' inhibits -fontification during full screen scrolling operations, giving less -hesitant operation during auto-repeat of 'C-v', 'M-v' at the cost of -possible inaccuracies in the end position. - -** New documentation command 'describe-symbol'. -Works for functions, variables, faces, etc. It is bound to 'C-h o' by -default. - -** New function 'custom-prompt-customize-unsaved-options' checks for -unsaved customizations and prompts user to customize (if found). It -is intended for adding to 'kill-emacs-query-functions'. - -** The old 'C-x w' bindings in 'hi-lock-mode' are officially deprecated -in favor of the global 'M-s h' bindings introduced in Emacs 23.1. -They'll disappear soon. - - -* Changes in Specialized Modes and Packages in Emacs 25.1 - -** Checkdoc - -*** New command 'checkdoc-package-keywords' checks if the -current package keywords are recognized. Set the new option -'checkdoc-package-keywords-flag' to non-nil to make -'checkdoc-current-buffer' call this function automatically. - -*** New function 'checkdoc-file' checks for style errors. -It's meant for use together with 'compile': -emacs -batch --eval "(checkdoc-file \"subr.el\")" - -** Desktop - -*** The desktop format version has been upgraded from 206 to 208. -Although Emacs 25.1 can read a version 206 desktop, earlier Emacsen -cannot read a version 208 desktop. To upgrade your desktop file, you -must explicitly request the upgrade, by 'C-u M-x desktop-save'. You are -recommended to do this as soon as you have firmly upgraded to Emacs -25.1 (or later). Should you ever need to downgrade your desktop file -to version 206, you can do this with 'C-u C-u M-x desktop-save'. - -*** 'desktop-restore-in-current-display' now defaults to t, not nil. -That is, Emacs by default now restores frames into the current display. - -** New function 'bookmark-set-no-overwrite' bound to 'C-x r M'. -It raises an error if a bookmark of that name already exists, -unlike 'bookmark-set' which silently updates an existing bookmark. - -** Gnus - -*** New user options 'mm-html-inhibit-images' and 'mm-html-blocked-images' -now control how mm-* functions fetch and display images in an HTML -message. Gnus still uses 'gnus-inhibit-images' and 'gnus-blocked-images' -for that purpose, i.e., binds mm-html- variables with those gnus- -variables, but other packages do not have to bind gnus- variables now. - -*** 'mm-inline-text-html-with-images' has been removed. -Use 'mm-html-inhibit-images' instead. Note that the value is opposite -in meaning. +--- +The group 'wp', whose label was "text", is now deprecated. +Use the new group 'text', which inherits from 'wp', instead. -** IMAP ++++ +** The new function 'call-shell-region' executes a command in an +inferior shell with the buffer region as input. -*** 'imap-ssl-program' has been removed, and imap.el uses the internal -GnuTLS encryption functions if possible. ++++ +** The new user option 'shell-command-dont-erase-buffer' controls +if the output buffer is erased between shell commands; if non-nil, +the output buffer is not erased; this variable also controls where +to set the point in the output buffer: beginning of the output, +end of the buffer or save the point. +When 'shell-command-dont-erase-buffer' is nil, the default value, +the behaviour of 'shell-command', 'shell-command-on-region' and +'async-shell-command' is as usual. -** JSON ++++ +** The new user option 'mouse-select-region-move-to-beginning' +controls the position of point when double-clicking mouse-1 on the end +of a parenthetical grouping or string-delimiter: the default value nil +keeps point at the end of the region, setting it to non-nil moves +point to the beginning of the region. -*** 'json-encode-string' now only escapes the characters it has to. -Which means that the encoded strings can contain non-ASCII characters. ++++ +** The new user option 'confirm-kill-processes' allows the user to +skip a confirmation prompt for killing subprocesses when exiting +Emacs. When set to t (the default), Emacs will prompt for +confirmation before killing subprocesses on exit, which is the same +behavior as before. -*** 'json-pretty-print' and 'json-pretty-print-buffer' now maintain -the ordering of object keys by default. +--- +** 'find-library-name' will now fall back on looking at 'load-history' +to try to locate libraries that have been loaded with an explicit path +outside 'load-path'. -*** New commands 'json-pretty-print-ordered' and -'json-pretty-print-buffer-ordered' pretty prints JSON objects with -object keys sorted alphabetically. ++++ +** Faces in 'minibuffer-prompt-properties' no longer overwrite properties +in the text in functions like 'read-from-minibuffer', but instead are +added to the end of the face list. This allows users to say things +like '(read-from-minibuffer (propertize "Enter something: " 'face 'bold))'. -** Prettify Symbols mode ++++ +** The new variable 'extended-command-suggest-shorter' has been added +to control whether to suggest shorter 'M-x' commands or not. -*** Prettify Symbols mode supports custom composition predicates. By -overriding the default 'prettify-symbols-compose-predicate', modes can -specify in which contexts a symbol may be displayed as some Unicode -character. 'prettify-symbols-default-compose-p' is the default which -is suitable for most programming languages such as C or Lisp (but not -(La)TeX). +--- +** icomplete now respects 'completion-ignored-extensions'. -*** Symbols can be unprettified while point is inside them. -New variable 'prettify-symbols-unprettify-at-point' configures this. ++++ +** Non-breaking hyphens are now displayed with the 'nobreak-hyphen' +face instead of the 'escape-glyph' face. -** Enhanced xterm support +--- +** 'C-x h' ('mark-whole-buffer') will now avoid marking the prompt +part of minibuffers. -*** The new variable 'xterm-screen-extra-capabilities' for configuring xterm. -This variable tells Emacs which advanced capabilities are available in -the xterm terminal emulator used to display Emacs text-mode frames. -The default is to check each capability, and use it if available. -(This variable was introduced in Emacs 24.1, but was not announced in -its NEWS.) +--- +** 'find-library' now takes a prefix argument to pop to a different +window. -*** Killing text now also sets the CLIPBOARD/PRIMARY selection -in the surrounding GUI (using the OSC-52 escape sequence). This only works -if your xterm supports it and enables the 'allowWindowOps' options (disabled -by default at least in Debian, for security reasons). +** 'find-library', 'help-function-def' and 'help-variable-def' now run +'find-function-after-hook'. -Similarly, you can yank the CLIPBOARD/PRIMARY selection (using the OSC-52 -escape sequence) if your xterm has the feature enabled but for that you -additionally need to add 'getSelection' to 'xterm-extra-capabilities'. +--- +** 'process-attributes' on Darwin systems now returns more information. -*** 'xterm-mouse-mode' now supports mouse-tracking (if your xterm supports it). ++++ +** Several accessors for the value returned by 'file-attributes' +have been added. They are: 'file-attribute-type', +'file-attribute-link-number', 'file-attribute-user-id', +'file-attribute-group-id', 'file-attribute-access-time', +'file-attribute-modification-time', +'file-attribute-status-change-time', 'file-attribute-size', +'file-attribute-modes', 'file-attribute-inode-number', +'file-attribute-device-number' and 'file-attribute-collect'. -** The way to turn on and off 'save-place' mode has changed. -It is no longer sufficient to load the saveplace library and set -'save-place' non-nil. Instead, use the two new minor modes: -'save-place-mode' turns on saving last place in every file, and -'save-place-local-mode' does that only for the file in whose buffer it -is invoked. The 'save-place' variable is now an obsolete alias for -'save-place-mode', which replaces it, and 'toggle-save-place' is an -obsolete alias for the new 'save-place-local-mode' command. ++++ +** The new function 'buffer-hash' computes a fast, non-consing hash of +a buffer's contents. -** ERC +--- +** 'fill-paragraph' no longer marks the buffer as changed unless it +actually changed something. -*** ERC can now hide message types by network or channel. -'erc-hide-list' will hide all messages of the specified type, while -'erc-network-hide-list' and 'erc-channel-hide-list' will only hide the -specified message types for the respective specified targets. +--- +** The locale language name 'ca' is now mapped to the language +environment 'Catalan', which has been added. -*** Reconnection is now asynchronous. +--- +** 'align-regexp' has a separate history for its interactive argument. +'align-regexp' no longer shares its history with all other +history-less functions that use 'read-string'. -*** Nick completion is now case-insensitive again after inadvertently -being made case-sensitive in Emacs 24.2. ++++ +** The networking code has been reworked so that it's more +asynchronous than it was (when specifying :nowait t in +'make-network-process'). How asynchronous it is varies based on the +capabilities of the system, but on a typical GNU/Linux system the DNS +resolution, the connection, and (for TLS streams) the TLS negotiation +are all done without blocking the main Emacs thread. To get +asynchronous TLS, the TLS boot parameters have to be passed in (see +the manual for details). + +Certain process oriented functions (like 'process-datagram-address') +will block until socket setup has been performed. The recommended way +to deal with asynchronous sockets is to avoid interacting with them +until they have changed status to "run". This is most easily done +from a process sentinel. + +** 'make-network-process' and 'open-network-stream' sometimes allowed +:service to be an integer string (e.g., :service "993") and sometimes +required an integer (e.g., :service 993). This difference has been +eliminated, and integer strings work everywhere. + +** It is possible to disable attempted recovery on fatal signals. + +Two new variables support disabling attempts to recover from stack +overflow and to avoid automatic auto-save when Emacs is delivered a +fatal signal. 'attempt-stack-overflow-recovery', if set to 'nil', +will disable attempts to recover from C stack overflows; Emacs will +then crash as with any other fatal signal. +'attempt-orderly-shutdown-on-fatal-signal', if set to 'nil', will +disable attempts to auto-save the session and shut down in an orderly +fashion when Emacs receives a fatal signal; instead, Emacs will +terminate immediately. Both variables are non-'nil' by default. +These variables are for users who would like to avoid the small +probability of data corruption due to techniques Emacs uses to recover +in these situations. -** MPC ++++ +** File local and directory local variables are now initialized each +time the major mode is set, not just when the file is first visited. +These local variables will thus not vanish on setting a major mode. -*** New commands, key binds, and menu items. ++++ +** A second dir-local file (.dir-locals-2.el) is now accepted. +See the variable 'dir-locals-file-2' for more information. -**** '<' and '>' for navigating previous and next tracks in playlist +--- +** International domain names (IDNA) are now encoded via the new +puny.el library, so that one can visit web sites with non-ASCII URLs. -**** New play/pause command 'mpc-toggle-play' bound to 's' ++++ +** The new 'timer-list' command lists all active timers in a buffer, +where you can cancel them with the 'c' command. -**** 'g' bound to new command 'mpc-seek-current' will navigate current -track. ++++ +** The new function 'read-multiple-choice' prompts for multiple-choice +questions, with a handy way to display help texts. -**** New commands 'mpc-toggle-{consume,repeat,single,shuffle}' for -toggling playback modes. ++++ +** 'switch-to-buffer-preserve-window-point' now defaults to t. -*** Now supports connecting to a UNIX domain socket. ++++ +** The new variable 'debugger-stack-frame-as-list' allows displaying +all call stack frames in a Lisp backtrace buffer as lists. Both +debug.el and edebug.el have been updated to heed to this variable. -*** Looks at more image file names to use as album art. -Case-insensitively tries for .folder.png (freedesktop) and folder.jpg -(XP) in addition to cover.jpg. + +* Editing Changes in Emacs 26.1 -*** Searches in more locations for MPD configuration files. -MPD supports the XDG base directory specification since version 0.17.6. ++++ +** New bindings for 'query-replace-map'. +'undo', undo the last replacement; bound to 'u'. +'undo-all', undo all replacements; bound to 'U'. -** Midnight-mode +** 'delete-trailing-whitespace' deletes whitespace after form feed. +In modes where form feed was treated as a whitespace character, +'delete-trailing-whitespace' would keep lines containing it unchanged. +It now deletes whitespace after the last form feed thus behaving the +same as in modes where the character is not whitespace. -*** 'midnight-mode' is now a proper minor mode. +** No more prompt about changed file when the file's content is unchanged. +Instead of only checking the modification time, Emacs now also checks +the file's actual content before prompting the user. -*** clean-buffer-*-regexps can now specify buffers via predicate functions. + +* Changes in Specialized Modes and Packages in Emacs 26.1 -** package.el +** Ibuffer -*** New "external" package status. -An external package is any installed package that's not built-in and -not from 'package-user-dir', which usually means it's from an entry in -'package-directory-list'. They are treated much like built-in -packages, in that they cannot be deleted through the package menu and -are not considered for upgrades. +--- +*** A new command 'ibuffer-copy-buffername-as-kill'; bound +to 'B'. -The effect is that a user can manually place a specific version of a -package inside 'package-directory-list' and the package menu will -always respect that. +--- +*** New command 'ibuffer-change-marks'; bound to '* c'. -*** If a package is available on multiple archives and one has higher -priority (as per 'package-archive-priorities') only that one is -listed. This can be configured with 'package-menu-hide-low-priority'. +--- +*** A new command 'ibuffer-mark-by-locked' to mark +all locked buffers; bound to '% L'. -*** 'package-menu-toggle-hiding' now toggles the hiding of packages. -This includes the above-mentioned low-priority packages, as well as -available packages whose version is lower than the currently installed -version (which were previously impossible to display). -This allows users to downgrade a package if a lower version is -available. +--- +*** A new option 'ibuffer-locked-char' to indicate +locked buffers; Ibuffer shows a new column displaying +'ibuffer-locked-char' for locked buffers. -*** When filtering the package menu, keywords starting with "arc:" or -"status:" represent package archive or status, respectively, instead -of actual keywords. +--- +*** A new command 'ibuffer-unmark-all-marks' to unmark +all buffers without asking confirmation; bound to +'U'; 'ibuffer-do-replace-regexp' bound to 'r'. -*** Most functions which involve downloading information now take an -ASYNC argument. If it is non-nil, package.el performs the download(s) -asynchronously. +--- +*** A new command 'ibuffer-mark-by-content-regexp' to mark buffers +whose content matches a regexp; bound to '% g'. -*** New variable 'package-menu-async' controls whether the -package-menu uses asynchronous downloads. +--- +*** Two new options 'ibuffer-never-search-content-name' and +'ibuffer-never-search-content-mode' used by +'ibuffer-mark-by-content-regexp'. -*** 'package-install-from-buffer' and 'package-install-file' work on directories. -This follows the same rules as installing from a .tar file, except the --pkg file is optional. +** Compilation mode -*** Packages which are dependencies of other packages cannot be deleted. -The FORCE argument to 'package-delete' overrides this. +--- +*** Messages from CMake are now recognized. -*** New custom variable 'package-selected-packages' tracks packages -which were installed by the user (as opposed to installed as -dependencies). This variable can also be manually customized. +** Dired -*** New command 'package-install-selected-packages' installs all -packages from 'package-selected-packages' which are currently missing. ++++ +*** A New option 'dired-always-read-filesystem' default to nil. +If non-nil, buffers visiting files are reverted before search them; +for instance, in 'dired-mark-files-containing-regexp' a non-nil value +of this option means the file is revisited in a temporary buffer; +this temporary buffer is the actual buffer searched: the original buffer +visiting the file is not modified. -*** 'package-install' function now takes a DONT-SELECT argument. If -this function is called interactively or if DONT-SELECT is nil, add the -package being installed to 'package-selected-packages'. ++++ +*** In wdired, when editing files to contain slash characters, +the resulting directories are automatically created. Whether to do +this is controlled by the 'wdired-create-parent-directories' variable. -*** New command 'package-autoremove' removes all packages which were -installed strictly as dependencies but are no longer needed. ++++ +*** 'W' is now bound to 'browse-url-of-dired-file', and is useful for +viewing HTML files and the like. -** Shell +** Ediff -When you invoke 'shell' interactively, the '*shell*' buffer will now -display in a new window. However, you can customize this behavior via -the 'display-buffer-alist' variable. For example, to get -the old behavior -- '*shell*' buffer displays in current window -- use -(add-to-list 'display-buffer-alist - '("^\\*shell\\*$" . (display-buffer-same-window))). - -** EIEIO -*** The ':protection' slot option is not obeyed any more. -*** The 'newname' argument to constructors is optional&deprecated. -If you need your objects to be named, do it by inheriting from 'eieio-named'. -*** The <class>-list-p and <class>-child-p functions are declared obsolete. -*** The <class> variables are declared obsolete. -*** The <initarg> variables are declared obsolete. -*** defgeneric and defmethod are declared obsolete. -Use the equivalent facilities from cl-generic.el instead. -*** 'constructor' is now an obsolete alias for 'make-instance'. -*** 'pcase' accepts a new UPattern 'eieio'. - -** ido - -*** New command 'ido-bury-buffer-at-head' bound to 'C-S-b'. -Bury the buffer at the head of 'ido-matches', analogous to how 'C-k' -kills the buffer at head. - -*** A prefix argument to 'ido-restrict-to-matches' will reverse its -meaning, and the list is restricted to those elements that do not -match the current input. - -** Minibuffer - -*** You can use <UP> and <DOWN> arrow keys to move through history by lines. -The new commands 'next-line-or-history-element' and -'previous-line-or-history-element', bound to <UP> and <DOWN> in the -minibuffer, allow by-line movement through minibuffer history, -similarly to an ordinary buffer. Only when point moves over -the bottom/top of the minibuffer it goes to the next/previous history -element. 'M-p' and 'M-n' still move directly to previous/next history -item as before. - -** Search and Replace - -*** 'isearch' and 'query-replace' can now perform character folding in matches. -This is analogous to case folding, but instead of disregarding case -variants, it disregards wider classes of distinctions between similar -characters. (Case folding is a special case of character folding.) -This means many characters in the search string will match entire -groups of characters instead of just themselves. - -For instance, the ASCII double quote character " will match all -variants of double quotes, and the letter 'a' will match all of its -accented cousins, even those composed of multiple characters, as well -as many other symbols like U+249C (PARENTHESIZED LATIN SMALL LETTER -A). - -Character folding is enabled by customizing 'search-default-mode' to -the value 'char-fold-to-regexp'. You can also toggle character -folding in the middle of a search by typing 'M-s ''. - -'query-replace' honors character folding if the new variable -'replace-char-fold' is customized to a non-nil value. - -*** New user option 'search-default-mode'. -This option specifies the default mode for Isearch. The default -value, nil specifies that Isearch does literal searches (however, -'case-fold-search' and 'isearch-lax-whitespace' may still be applied, -as in previous Emacs versions). - -*** New function 'char-fold-to-regexp' can be used -by searching commands to produce a regexp matching anything that -char-folds into STRING. - -*** The new 'M-s M-w' key binding uses eww to search the web for the -text in the region. The search engine to use for this is specified by -the customizable variable 'eww-search-prefix'. - -*** 'query-replace' history is enhanced. -When 'query-replace' reads the FROM string from the minibuffer, typing -'M-p' will now show previous replacements as "FROM SEP TO", where FROM -and TO are the original text and its replacement, and SEP is an arrow -string defined by the new variable 'query-replace-from-to-separator'. -To select a prior replacement, type 'M-p' until the desired -replacement appears in the minibuffer, and then exit the minibuffer by -typing RET. - -** Calc -*** If 'quick-calc' is called with a prefix argument, insert the -result of the calculation into the current buffer. - -** In Edebug, you can now set the initial mode with 'C-x C-a C-m'. -With this you can tell Edebug not to stop at the start of the first -instrumented function. - -** ElDoc - -*** New minor mode 'global-eldoc-mode'. -It is turned on by default, and affects '*scratch*' and other buffers -whose major mode supports Emacs Lisp. - -*** 'eldoc-documentation-function' now defaults to 'ignore'. - -*** 'describe-char-eldoc' displays information about character at point, -and can be used as a default value of 'eldoc-documentation-function'. It is -useful when, for example, one needs to distinguish various spaces - e.g., -U+00A0 (NO-BREAK SPACE), U+2002 (EN SPACE), and U+2009 (THIN SPACE) - while -using mono-spaced font. +*** Ediff can be prevented from pausing 1 second after reaching a +breakpoint (e.g. with "f" and "o") by customizing the new option +'edebug-sit-on-break'. ** eww -*** HTML can now be rendered using variable-width fonts. - -*** A new command 'F' ('eww-toggle-fonts') can be used to toggle -whether to use variable-pitch fonts or not. The user can also -customize the 'shr-use-fonts' variable. ++++ +*** A new 's' command for switching to another eww buffer via the minibuffer. -*** A new command 'R' ('eww-readable') will try do identify the main -textual parts of a web page and display only that, leaving menus and -the like off the page. +--- +*** The 'o' command ('shr-save-contents') has moved to 'O' to avoid collision +with the 'o' command from 'image-map'. -*** A new command 'D' ('eww-toggle-paragraph-direction') allows you to -toggle the paragraph direction between left-to-right and right-to-left. ++++ +*** A new command 'C' ('eww-toggle-colors') can be used to toggle +whether to use the HTML-specified colors or not. The user can also +customize the 'shr-use-colors' variable. -*** You can now use several eww buffers in parallel by renaming eww -buffers you want to keep separate. +--- +*** Images that are being loaded are now marked with gray +"placeholder" images of the size specified by the HTML. They are then +replaced by the real images asynchronously, which will also now +respect width/height HTML specs (unless they specify widths/heights +bigger than the current window). -*** Partial state of the eww buffers (the URIs and the titles of the -pages visited) is now preserved in the desktop file. +** Images -*** 'eww-after-render-hook' is now called after eww has rendered -the data in the buffer. ++++ +*** Images are automatically scaled before displaying based on the +'image-scaling-factor' variable (if Emacs supports scaling the images +in question). -*** The 'eww-reload' command now takes a prefix to not reload via -the net, but just use the local copy of the HTML. ++++ +*** Images inserted with 'insert-image' and related functions get a +keymap put into the text properties (or overlays) that span the +image. This keymap binds keystrokes for manipulating size and +rotation, as well as saving the image to a file. These commands are +also available in 'image-mode'. -*** The DOM shr and eww uses has been changed to the general Emacs -xml.el/libxml2 DOM, and a new package dom.el has been added to -interact with this DOM. See the Emacs Lisp manual for interface ++++ +*** A new library for creating and manipulating SVG images has been +added. See the "SVG Images" section in the lispref manual for details. -*** 'mailcap-mime-data' is now consulted when displaying PDF files. - -*** The new 'S' command will list all eww buffers, and allow managing -them. - -*** https pages with valid certificates have headers marked in green, while -invalid certificates are marked in red. - -** Message mode - -*** text/html messages that contain inline image parts will be -transformed into multipart/related messages before sending. - -** In Show Paren Mode, a parenthesis can be highlighted when point -stands inside it, and certain parens can be highlighted when point is -at BOL or EOL, or in whitespace there. To enable these, customize, -respectively, 'show-paren-when-point-inside-paren' or -'show-paren-when-point-in-periphery'. - -** If gpg2 exists on the system, it is now used as the default value -of 'epg-gpg-program' (instead of gpg). - -** Lisp mode - -*** Strings after ':documentation' are highlighted as docstrings. -This enhances Lisp mode fontification to handle documentation of the -form '(:documentation "the doc string")' used in Common Lisp code for -CLOS class and slot documentation. - -** Rectangle editing - -*** Rectangle Mark mode can have corners past EOL or in the middle of a TAB. - -*** 'C-x C-x' in 'rectangle-mark-mode' now cycles through the four corners. -*** 'string-rectangle' provides on-the-fly preview of the result. - -** New font-lock functions 'font-lock-ensure' and 'font-lock-flush'. -These should be used in preference to 'font-lock-fontify-buffer' when -called from Lisp. - -** Macro 'minibuffer-with-setup-hook' can optionally append a function -to 'minibuffer-setup-hook'. - -If the first argument of the macro is of the form '(:append FUN)', -then FUN will be appended to 'minibuffer-setup-hook', instead of -prepending it. - -** cl-lib -*** New functions 'cl-fresh-line', 'cl-digit-char-p', and 'cl-parse-integer'. - -*** 'pcase' accepts the new UPattern 'cl-struct'. - -** Calendar and diary - -*** The default 'diary-file' is now located in "~/.emacs.d". - -*** New commands to insert diary entries with Chinese dates: -'diary-chinese-insert-anniversary-entry' 'diary-chinese-insert-entry' -'diary-chinese-insert-monthly-entry', 'diary-chinese-insert-yearly-entry'. - -*** The calendar can now list and mark diary entries with Chinese dates. -See 'diary-chinese-list-entries' and 'diary-chinese-mark-entries'. - -*** The option 'calendar-mode-line-format' can now be nil, -which means to do nothing special with the mode line in calendars. - -*** New option 'calendar-weekend-days'. -The option customizes which day headers receive the -'calendar-weekend-header' face. - -*** New optional args N and STRING for 'holiday-greek-orthodox-easter'. - -*** Many items obsolete since at least version 23.1 have been removed. -The majority were function/variable/face aliases, too numerous to list here. -The remainder were: ++++ +*** New setf-able function to access and set image parameters is +provided: 'image-property'. -**** Functions 'calendar-one-frame-setup', 'calendar-only-one-frame-setup', -'calendar-two-frame-setup', 'european-calendar', 'american-calendar'. +--- +** The default 'Info-default-directory-list' no longer checks some obsolete +directory suffixes (gnu, gnu/lib, gnu/lib/emacs, emacs, lib, lib/emacs) +when searching for info directories. -**** Hooks 'cal-menu-load-hook', 'cal-x-load-hook'. ++++ +** The commands that add ChangeLog entries now prefer a VCS root directory +for the ChangeLog file, if none already exists. Customize +'change-log-directory-files' to nil for the old behavior. -**** Macro 'calendar-for-loop'. +--- +** Support for non-string values of 'time-stamp-format' has been removed. -**** Variables 'european-calendar-style', 'diary-face', 'hebrew-holidays-{1,4}'. +** Message -**** The nil and list forms of 'diary-display-function'. +--- +*** 'message-use-idna' now defaults to t (because Emacs comes with +built-in IDNA support now). -** New ERT function 'ert-summarize-tests-batch-and-exit'. -If the output of ERT tests in batch mode execution can be saved to a -log file, then it can be passed as an argument to the above function -to produce a neat summary. +--- +*** When sending HTML messages with embedded images, and you have +exiftool installed, and you rotate images with EXIF data (i.e., +JPEGs), the rotational information will be inserted into the outgoing +image in the message. (The original image will not have its +orientation affected.) -** New js.el option 'js-indent-first-init'. +--- +*** The 'message-valid-fqdn-regexp' variable has been removed, since +there are now top-level domains added all the time. Message will no +longer warn about sending emails to top-level domains it hasn't heard +about. -** Info +*** 'message-beginning-of-line' (bound to C-a) understands folded headers. +In 'visual-line-mode' it will look for the true beginning of a header +while in non-'visual-line-mode' it will move the point to the indented +header's value. -** Info mode now displays symbol names in fixed-pitch font. -If you want to get the old behavior back, customize the 'Info-quoted' -face to use the same definitions as the default face. +** Tramp -*** 'Info-fontify-maximum-menu-size' can be t for no limit. ++++ +*** New connection method "sg", which supports editing files under a +different group ID. -*** 'info-display-manual' can now be given a prefix argument which (any -non-nil value) directs the command to limit the completion -alternatives to currently visited manuals. ++++ +*** New connection method "doas" for OpenBSD hosts. -** ntlm.el has support for NTLM2. ++++ +*** New connection method "gdrive", which allows to access Google +Drive onsite repositories. -** Rmail ++++ +Setting the "ENV" environment variable in 'tramp-remote-process-environment' +enables reading of shell initialization files. -*** The Rmail commands 'd', 'C-d' and 'u' take optional repeat counts -to delete or undelete multiple messages. +--- +** 'auto-revert-use-notify' is set back to t in 'global-auto-revert-mode'. -*** Rmail can now render HTML mail messages if your Emacs was built with -libxml2 or if you have the Lynx browser installed. By default, Rmail -will display the HTML version of a mail message that has both HTML and -plain text parts, if display of HTML email is possible; customize the -'rmail-mime-prefer-html' option to nil if you don't want that. +** CSS mode -*** In the commands that make summaries by subject, recipients, or senders, -you can no longer use commas to separate regular expressions. +--- +*** Support for completing attribute values, at-rules, bang-rules, +HTML tags, classes and IDs using the 'completion-at-point' command. +Completion candidates for HTML classes and IDs are retrieved from open +HTML mode buffers. -** SES now supports local printer functions; see 'ses-define-local-printer'. ++++ +** Emacs now supports character name escape sequences in character and +string literals. The syntax variants \N{character name} and +\N{U+code} are supported. -** Shell-script Mode -*** In sh-mode you can now use 'sh-shell' as a file-local variable to -specify the type of shell in use (bash, csh, etc). ++++ +** Prog mode has some support for multi-mode indentation. +This allows better indentation support in modes that support multiple +programming languages in the same buffer, like literate programming +environments or ANTLR programs with embedded Python code. -*** New value 'always' for 'sh-indent-after-continuation'. -This provides old-style ("dumb") indentation of continued lines. -See the doc string of 'sh-indent-after-continuation' for details. +A major mode can provide indentation context for a sub-mode through +the 'prog-indentation-context' variable. To support this, modes that +provide indentation should use 'prog-widen' instead of 'widen' and +'prog-first-column' instead of a literal zero. See the node +"Mode-Specific Indent" in the ELisp manual for more details. -** TLS -*** Fatal TLS errors are now silent by default. +** ERC -*** If Emacs isn't built with TLS support, an external TLS-capable -program is used instead. This program used to be run in --insecure -mode by default, but has now changed to be secure instead, and will -fail if you try to connect to non-verifiable hosts. This is -controlled by the 'tls-program' variable. +*** New variable 'erc-default-port-tls' used to connect to TLS IRC +servers. ** URL -*** The URL package accepts now the protocols "ssh", "scp" and "rsync". -When 'url-handler-mode' is enabled, file operations for these -protocols as well as for "telnet" and "ftp" are passed to Tramp. - -*** The URL package allows customizing the 'url-user-agent' string. -The new 'url-user-agent' variable can be customized to be a string or -a function. - -*** The new interface variable 'url-request-noninteractive' can be used -to specify that we're running in a noninteractive context, and that -we should not be queried about things like TLS certificate validity. - -*** 'url-mime-accept-string' can now be used as in "interface" -variable, meaning you can bind it around an 'url-retrieve' call. - -*** If URL is used with a https connection, the first callback argument -PLIST will contain a :peer element that has the output of -'gnutls-peer-status' (if Emacs is built with GnuTLS support). - -** Tramp - -*** New connection method "afp", which allows you to access Mac OS X -volumes via the Apple Filing Protocol. - -*** New connection method "nc", which allows you to access dumb -busyboxes. - -*** Method-specific parameters can be overwritten now with variable -'tramp-connection-properties'. - -*** Handler for 'file-notify-valid-p' for remote machines that support -filesystem notifications. - -** SQL mode ++++ +*** The new function 'url-cookie-delete-cookie' can be used to +programmatically delete all cookies, or cookies from a specific +domain. -*** New user variable 'sql-default-directory' enables remote -connections using Tramp. ++++ +*** 'url-retrieve-synchronously' now takes an optional timeout parameter. -*** New command 'sql-send-line-and-next'. -This command, bound to 'C-c C-n' by default, sends the current line to -the SQL process and advances to the next line, skipping whitespace and -comments. +--- +*** The URL package now support HTTPS over proxies supporting CONNECT. -*** Added support for Vertica SQL. ++++ +*** 'url-user-agent' now defaults to 'default', and the User-Agent +string is computed dynamically based on 'url-privacy-level'. ** VC and related modes -*** Basic push support, via 'vc-push', bound to 'C-x v P'. -Implemented for Bzr, Git, Hg. As part of this change, the pre-existing -(undocumented) command 'vc-hg-push' now behaves slightly differently. - -*** The new command 'vc-region-history' shows the log+diff of the active region. - -*** You can refresh the VC state of a file buffer with 'M-x vc-refresh-state'. -This command is useful when you perform version control commands -outside Emacs (e.g., from the shell prompt), or if you switch the VC -back-end for the buffer's file, or remove it from version control. - -*** New option 'vc-annotate-background-mode' controls whether -the color range from 'vc-annotate-color-map' is applied to the -background or to the foreground. - -*** New options for customizing encoding of Git commit log messages. -The new user options 'vc-git-commits-coding-system' and -'vc-git-log-output-coding-system' specify the encoding of log messages -sent to Git when committing, and the decoding of log messages read -from Git history commands. These options default to UTF-8; if -customized, they should be consistent with the Git config variables -i18n.commitEncoding and i18n.logOutputEncoding. -('vc-git-commits-coding-system' existed previously, but was a -variable, not a user option.) - -*** 'compare-windows' now compares text with the most recently selected window -instead of the next window. If you want the previous behavior of -comparing with the next window, customize the new option -'compare-windows-get-window-function' to the value -'compare-windows-get-next-window'. - -*** Two new faces 'compare-windows-removed' and 'compare-windows-added' -replace the face 'compare-windows', which is now an obsolete alias for -'compare-windows-added'. - -*** The VC state indicator in the mode line now has different faces -corresponding to each of the possible states. See the 'vc-faces' -customization group. - -*** 'log-edit-insert-changelog' converts "(tiny change)" to -"Copyright-paperwork-exempt: yes". Set 'log-edit-rewrite-tiny-change' -nil to disable this. - -*** vc-mcvs.el has been removed. - -** VHDL mode now supports VHDL'08. - -** Calculator - -*** Decimal display mode uses "," groups, so it's more -fitting for use in money calculations - -*** Factorial works with non-integer inputs. - -** Hide-IfDef mode - -*** Hide-IfDef mode now support full C/C++ expressions in macros, -macro argument expansion, interactive macro evaluation and automatic -scanning of #define'd symbols. - -*** New command 'hif-evaluate-macro', bound to 'C-c @ e', displays the -result of evaluating a macro. - -*** New command 'hif-clear-all-ifdef-define', bound to 'C-c @ C', clears -all defined symbols in 'hide-ifdef-env'. - -*** New custom variable 'hide-ifdef-header-regexp' to define C/C++ header -file name patterns. Defaults to files whose extension is one of '.h', -'.hh', '.hpp', '.hxx', or '.h++', matched case-insensitively. - -*** New custom variable 'hide-ifdef-expand-reinclusion-protection' to prevent -reinclusion protected (a.k.a. "idempotent") header files from being hidden. -(This could happen when an idempotent header file is visited again, -when its guard symbol is already defined.) Defaults to t. - -*** New custom variable 'hide-ifdef-exclude-define-regexp' to define symbol -name patterns (e.g. all "FOR_DOXYGEN_ONLY_*") to be ignored when -looking for macro definitions. By default, no symbols are ignored. - -** TeX mode - -*** New custom variable 'tex-print-file-extension' to help users who -use PDF instead of DVI. - -*** TeX mode now supports Prettify Symbols mode. When enabling -'prettify-symbols-mode' in a tex-mode buffer, \alpha ... \omega, and -many other math macros are displayed using unicode characters. - -** New 'big-indent' style in 'whitespace-mode' highlights deep indentation. -By default, 32 consecutive spaces or four consecutive TABs are -considered to be too deep, but the new variable -'whitespace-big-indent-regexp' can be customized to change that. - -** New options in 'tildify-mode'. -New options 'tildify-space-string', 'tildify-pattern', and -'tildify-foreach-region-function' variables make -'tildify-string-alist', 'tildify-pattern-alist', and -'tildify-ignored-environments-alist' variables (as well as a few -helper functions) obsolete. - -** New package Xref replaces Etags's front-end and UI. - -The new package Xref provides a generic framework and new commands to -find and move to definitions of functions, macros, data structures -etc., as well as go back to the location where you were before moving -to a definition. It supersedes and obsoletes many Etags commands, -while still using the etags.el code that reads the TAGS tables as one -of its back-ends. - -The command 'xref-find-definitions' replaces 'find-tag' and provides -an interface to pick one definition among several. -'tags-loop-continue' is now unbound. 'xref-pop-marker-stack' replaces -'pop-tag-mark', but has a keybinding ('M-,') different from the one -'pop-tag-mark' used. - -'xref-find-definitions-other-window' replaces 'find-tag-other-window'. -'xref-find-definitions-other-frame' replaces 'find-tag-other-frame'. -'xref-find-apropos' replaces 'find-tag-regexp'. - -As a result of this, the following commands are now obsolete: -'find-tag-other-window', 'find-tag-other-frame', 'find-tag-regexp', -'tags-apropos'. - -'tags-loop-continue' is not obsolete because it's still useful in -'tags-search' and 'tags-query-replace', for which there are no direct -replacements yet. - -*** Variants of 'tags-search' and 'tags-query-replace' in Dired were also -replaced by xref-style commands, see the "Dired" section below. - -*** New variables - -'find-tag-marker-ring-length' is now an obsolete alias for -'xref-marker-ring-length'. 'find-tag-marker-ring' is now an obsolete -alias for a private variable. 'xref-push-marker-stack' and -'xref-pop-marker-stack' should be used instead to manipulate the stack -of searches for definitions. - -*** 'xref-find-definitions' and 'describe-function' now display -information about mode local overrides (defined by cedet/mode-local.el -'define-overloadable-function' 'define-mode-local-overrides'). - -The framework's Lisp API is still experimental and can change in major, -backward-incompatible ways. - -** New package Project - -The new package Project provides generic infrastructure for dealing -with projects. The main commands included in it are -'project-find-file' and 'project-find-regexp'. - -The Lisp API of this package is still experimental. - -** EUDC -EUDC's LDAP backend has been improved. - -*** EUDC supports LDAP-over-SSL URLs (ldaps://). - -*** EUDC passes LDAP passwords through a pipe to the ldapsearch -subprocess instead of on the command line. - -*** EUDC handles LDAP wildcards automatically so the user shouldn't -need to configure this manually anymore. - -*** The LDAP configuration section of EUDC's manual has been -rewritten. - -There have also been customization changes. - -*** New custom variable 'eudc-server-hotlist' to allow specifying -multiple EUDC servers in init file. - -*** Custom variable 'eudc-inline-query-format' defaults to completing -on email and firstname instead of surname. - -*** Custom variable 'eudc-expansion-overwrites-query' defaults to nil -to avoid interfering with the kill ring. - -*** Custom variable 'eudc-inline-expansion-format' defaults to -"Firstname Surname <mail-address>". - -*** Custom variable 'eudc-options-file' defaults to -"~/.emacs.d/eudc-options". - -*** New custom variable 'ldap-ldapsearch-password-prompt-regexp' to -allow overriding the regular expression that recognizes the ldapsearch -command line's password prompt. - -*** EUDC's BBDB backend now supports BBDB 3. - -*** EUDC's PH backend (eudcb-ph.el) is obsolete. - -** Eshell - -*** The new built-in command 'clear' can scroll window contents out of sight. -If provided with an optional non-nil argument, the scrollback contents -will be cleared. - -*** New buffer syntax '#<buffer-name>', which is equivalent to -'#<buffer buffer-name>'. This shorthand makes interacting with -buffers from eshell more convenient. Custom variable -'eshell-buffer-shorthand', which has been broken for a while, has been -removed. - -*** By default, eshell "visual" program buffers (created by -'eshell-visual-commands' and similar custom vars) are no longer killed -when their processes die. This fixes issues with short-lived commands -and makes visual programs more useful in general. For example, if -"git log" is a visual command, it will always show the visual command -buffer, even if the "git log" process dies. For the old behavior, -make the new option 'eshell-destroy-buffer-when-process-dies' non-nil. - -** Browse-url - -*** Support for the Google Chrome web browser. - -*** Support for the Conkeror web browser. - -*** Support for several ancient browsers is now officially obsolete. - -** 'tar-mode': new 'tar-new-entry' command, allowing for new members to -be added to the archive. - -** Autorevert - -*** Dired buffers are also auto-reverted via file notifications, if -Emacs is compiled with file notification support. - -*** 'auto-revert-use-notify' is set to nil in 'global-auto-revert-mode'. -See <http://debbugs.gnu.org/22814>. - -** File Notifications - -*** The kqueue library is integrated for *BSD and Mac OS X machines. - -*** The new event 'stopped' signals, that a file notification watch is -not active any longer. - -*** The new function 'file-notify-valid-p' checks, whether a file -notification descriptor still corresponds to an activate watch. - -** Dired - -*** The command 'dired-do-compress', bound to 'Z', now can compress -directories and decompress zip files. - -*** New command 'dired-do-compress-to', bound to 'c', can be used to -compress many marked files into a single named archive. The -compression command is determined from the new -'dired-compress-files-alist' variable. - -*** New user interface for the 'A' and 'Q' commands. -These keys, now bound to 'dired-do-find-regexp' and -'dired-do-find-regexp-and-replace', work similarly to 'xref-find-apropos' -and 'xref-query-replace-in-results': they present the matches -in the '*xref*' buffer and let you move through the matches. No need -to use 'tags-loop-continue' to resume the search or replace loop. The -previous commands, 'dired-do-search' and -'dired-do-query-replace-regexp', are still available, but not bound to -keys; rebind 'A' and 'Q' to invoke them if you want the old behavior -back. We intend to obsolete the old commands in a future release. - -** Tabulated List Mode - -*** It is now safe for a mode that derives 'tabulated-list-mode' to not -call 'tabulated-list-init-header', in which case it will have no -header. - -*** 'tabulated-list-print' takes a second optional argument, UPDATE, -which specifies an alternative printing method which is faster when -few or no entries have changed. - -** Obsolete packages +--- +*** The VC state indicator in the mode line now defaults to more +colorful faces to make it more obvious to the user what the state is. +See the 'vc-faces' customization group. -*** gulp.el +** CC mode -*** landmark.el (moved to elpa.gnu.org) +*** Opening a .h file will turn C or C++ mode depending on language used. +This is done with the help of 'c-or-c++-mode' function which analyses +contents of the buffer to determine whether it's a C or C++ source +file. -* New Modes and Packages in Emacs 25.1 - -** pinentry.el allows GnuPG passphrase to be prompted through the -minibuffer instead of a graphical dialog, depending on whether the gpg -command is called from Emacs (i.e., INSIDE_EMACS environment variable -is set). This feature requires newer versions of GnuPG (2.1.5 or -later) and Pinentry (0.9.5 or later). To use this feature, add -"allow-emacs-pinentry" to "~/.gnupg/gpg-agent.conf" and reload the -configuration with "gpgconf --reload gpg-agent". - -** cl-generic.el provides CLOS-style multiple-dispatch generic functions. -The main entry points are 'cl-defgeneric' and 'cl-defmethod'. See the -node "Generic Functions" in the Emacs Lisp manual for more details. - -** 'scss-mode' (a minor variant of 'css-mode') is a major mode for editing -SCSS (Sassy CSS) files. - -** 'let-alist' is a new macro (and a package) that allows one to easily -let-bind the values stored in an alist. - -** 'tildify-mode' allows automatic insertion of hard spaces as one -types the text. Breaking line after a single-character words is -forbidden by Czech and Polish typography (and may be discouraged in -other languages), so 'auto-tildify-mode' makes it easier to create -a typographically-correct documents. - -** The 'seq' library adds sequence manipulation functions and macros -that complement basic functions provided by subr.el. All functions -are prefixed with 'seq-' and work on lists, strings and vectors. -'pcase' accepts a new Upattern 'seq'. - -** The 'map' library provides map-manipulation functions that work on -alists, hash-table and arrays. All functions are prefixed with -'map-'. 'pcase' accepts a new UPattern 'map'. - -** The 'thunk' library provides functions and macros to control the -evaluation of forms. +* New Modes and Packages in Emacs 26.1 -** 'js-jsx-mode' (a minor variant of 'js-mode') provides indentation -support for JSX, an XML-like syntax extension to ECMAScript. +** New Elisp data-structure library 'radix-tree'. -* Incompatible Lisp Changes in Emacs 25.1 - -** 'setq' and 'setf' must now be called with an even number of -arguments. The earlier behavior of silently supplying a nil to the -last variable when there was an odd number of arguments has been -eliminated. - -** 'syntax-begin-function' is declared obsolete. -Removed 'font-lock-beginning-of-syntax-function' and the SYNTAX-BEGIN -slot in 'font-lock-defaults'. - -** The new implementation of Subword mode affects word movement everywhere. -When Subword mode is turned on, 'forward-word', 'backward-word', and -everything that uses them will move by sub-words, effectively -overriding the buffer's syntax table. Lisp programs that shouldn't be -affected by Subword mode should call the new functions -'forward-word-strictly' and 'backward-word-strictly' instead. - -** 'package-initialize' now sets 'package-enable-at-startup' to nil if -called during startup. Users who call this function in their init -file and still expect it to be run after startup should set -'package-enable-at-startup' to t after the call to -'package-initialize'. - -** ':global' minor mode use 'setq-default' rather than 'setq'. -This means that you can't use 'make-local-variable' and expect them to -"magically" become buffer-local. - -** 'track-mouse' no longer freezes the shape of the mouse pointer. -The 'track-mouse' form no longer refrains from changing the shape of -the mouse pointer for the entire time the body of that form is -executed. Lisp programs that use 'track-mouse' for dragging across -large portions of the Emacs display, and want to avoid changes in the -pointer shape during dragging, should bind the variable 'track-mouse' -to the special value 'dragging' in the body of the form. - -** The optional PREDICATE argument of 'lisp-complete-symbol' no longer -has any effect. (This change was made in Emacs 24.4 but was not -advertised at the time.) - -** 'indirect-function' does not signal 'void-function' any more. -This is mostly a bug-fix, since this change was missed back in 24.4 when -'symbol-function' was changed not to signal 'void-function' any more. - -*** As a consequence, the second arg of 'indirect-function' is now obsolete. - -** 'M-x shell' and 'M-x compile' no longer set the EMACS environment variable. -This avoids clashing when other programs use the variable for other purposes. -Although 'M-x term' still sets EMACS for compatibility with Bash 4.3 -and earlier, this is deprecated and will be phased out when Bash 4.4 -or later takes over. Use the INSIDE_EMACS environment variable instead. - -** 'save-excursion' does not save&restore the mark any more. -Use 'save-mark-and-excursion' if you want the old behavior. - -** 'read-buffer' and 'read-buffer-function' can now be called with a 4th -argument (PREDICATE). - -** 'completion-table-dynamic' by default stays in the minibuffer. -The minibuffer will be the current buffer when the function is called. -If you want the old behavior of calling the function in the buffer -from which the minibuffer was entered, use the new argument -SWITCH-BUFFER to 'completion-table-dynamic'. - -** window-configurations no longer record the buffers' marks. - -** 'inhibit-modification-hooks' now also inhibits lock-file checks, as -well as active region handling. - -** 'deactivate-mark' is now buffer-local. - -** 'cl-the' now asserts that its argument is of the given type. - -** 'process-running-child-p' may now return a numeric process -group ID instead of t. - -** Mouse click events on mode line or header line no longer include -any reference to a buffer position. The 6th member of the mouse -position list returned for such events is now nil. - -** Menu items in keymaps do not support the "key shortcut cache" any more. -These slots used to hold key-shortcut data, but have been obsolete since -Emacs 21. - -** Emacs no longer downcases the first letter of a system diagnostic -when signaling a file error. For example, it now reports "Permission -denied" instead of "permission denied". The old behavior was problematic -in languages like German where downcasing rules depend on grammar. - -** New variable 'text-quoting-style' to control how Emacs translates quotes. -Set it to 'curve' for curved single quotes, to 'straight' for straight -apostrophes, and to 'grave' for grave accent and apostrophe. The -default value nil acts like 'curve' if curved single quotes are -displayable, and like 'grave' otherwise. The new variable affects -display of diagnostics and help, but not of info. As the variable is -not intended for casual use, it is not a user option. - -** Message-issuing functions like 'message' and 'error' now translate -various sorts of single quotes in their format strings according to -the value of 'text-quoting-style' (see above). This translation -cannot be disabled. To get the old behavior, use 'format', which is -not affected by 'text-quoting-style', e.g., (message "%s" (format -"...." foo bar)). - -** 'substitute-command-keys' now replaces quotes. -That is, it converts documentation strings' quoting style as per the -value of 'text-quoting-style'. Doc strings in source code can use -either curved single quotes or grave accents and apostrophes. As -before, characters preceded by \= are output as-is. - -** The character classes [:alpha:] and [:alnum:] in regular expressions -now match multibyte characters using Unicode character properties. -If you want the old behavior where they matched any character with -word syntax, use '\sw' instead. - -** The character classes [:graph:] and [:print:] in regular expressions -no longer match every multibyte character. Instead, Emacs now -consults the Unicode character properties to determine which -characters are graphic or printable. In particular, surrogates and -unassigned codepoints are now rejected. If you want the old behavior, -use [:multibyte:] instead. - -** The 'diff' command uses the unified format now. To restore the old -behavior, set 'diff-switches' to '-c'. - -** 'grep-template' and 'grep-find-template' values don't include the ---color argument anymore. It's added at the <C> place holder position -dynamically. Any third-party code that changes these templates should -be updated accordingly. - -** '(/ N)' is now equivalent to '(/ 1 N)' rather than to '(/ N 1)'. -The new behavior is compatible with Common Lisp and with XEmacs. -This change does not affect Lisp code intended to be portable to -Emacs 24.2 and earlier, which did not support unary '/'. - -** The 'default-directory' value doesn't have to end slash. To make -that happen, 'unhandled-file-name-directory' now defaults to calling -'file-name-as-directory'. - -** The URL package now insists on sending only unibyte strings to server -This means packages that use URL cannot bind 'url-request-data' to -multibyte strings. If non-ASCII characters should be part of the URL -payload, then 'url-request-data' should be encoded to become a unibyte -string. +* Incompatible Lisp Changes in Emacs 26.1 - -* Lisp Changes in Emacs 25.1 - -** 'pcase' -*** New UPatterns 'quote', 'app'. -*** New UPatterns can be defined with 'pcase-defmacro'. -*** New vector QPattern. - -** 'syntax-propertize' is now automatically called on-demand during forward -parsing functions like 'forward-sexp'. - -** New hooks 'prefix-command-echo-keystrokes-functions' and -'prefix-command-preserve-state-hook' allow the definition of prefix -commands other than the predefined 'C-u'. - -** New functions 'filepos-to-bufferpos' and 'bufferpos-to-filepos'. -These allow conversion between buffer positions and the corresponding -file byte offsets, given the file's encoding. - -** The default value of 'load-read-function' is now 'read'. -Previously, the default value of nil implied using 'read'. - -** New hook 'pre-redisplay-functions'. -It is a bit easier to use than 'pre-redisplay-function'. - -** The second arg of 'looking-back' should always be provided explicitly. -Previously, it was an optional argument, now it's mandatory. - -** Text properties 'intangible', 'point-entered', and 'point-left' are obsolete. -Replaced by properties 'cursor-intangible' and 'cursor-sensor-functions', -implemented by the new 'cursor-intangible-mode' and -'cursor-sensor-mode' minor modes. - -** 'inhibit-point-motion-hooks' now defaults to t and is obsolete. -Use the new minor modes 'cursor-intangible-mode' and -'cursor-sensor-mode' instead. - -** New process type 'pipe', which can be used in combination with the -':stderr' keyword of 'make-process' to handle standard error output -of subprocess. - -** New function 'make-process' provides an alternative interface to -'start-process'. It allows programs to set process parameters such as -process filter, sentinel, etc., through keyword arguments (similar to -'make-network-process'). - -** Subprocesses are automatically told about changes in window dimensions. -The new option 'window-adjust-process-window-size-function' controls -how subprocesses are told to adapt their logical window sizes to -changes in the Emacs window configuration. Its default value calls -'set-process-window-size' with the smallest dimensions of all the -windows that display the subprocess's buffer. - -** A new function 'directory-files-recursively' returns all matching -files (recursively) under a directory. - -** New variable 'inhibit-message', when bound to non-nil, inhibits -'message' and related functions from displaying messages in the echo -area. The output is still logged to the '*Messages*' buffer. ++++ +** Resizing a frame no longer runs 'window-configuration-change-hook'. +Put your function on 'window-size-change-functions' instead. -** A new text property 'inhibit-read-only' can be used in read-only -buffers to allow certain parts of the text to be writable. +** 'C-up', 'C-down', 'C-left' and 'C-right' are now defined in term +mode to send the same escape sequences that xterm does. This makes +things like forward-word in readline work. -** A new variable 'comment-end-can-be-escaped' is useful in languages -such as C and C++ where line comments with escaped newlines are -continued to the next line. +--- +** hideshow mode got four key bindings that are analogous to outline +mode bindings: 'C-c @ C-a', 'C-c @ C-t', 'C-c @ C-d', and 'C-c @ C-e.' -** New macro 'define-advice'. +** The grep/rgrep/lgrep functions will now ask about saving files +before running. This is controlled by the 'grep-save-buffers' +variable. -** Emacs Lisp now supports generators. -See the "Generators" section of the ELisp manual for the details. ++++ +** The variable 'text-quoting-style' no longer affects the treatment +of curved quotes in format arguments to functions like 'message' and +'format-message'. In particular, when this variable's value is +'grave', all quotes in formats are output as-is. -** New finalizer facility for running code when objects become unreachable. -See the "Finalizer Type" subsection in the ELisp manual for the -details. +** Functions like 'check-declare-file' and 'check-declare-directory' +now generate less chatter and more-compact diagnostics. The auxiliary +function 'check-declare-errmsg' has been removed. -** Lexical closures can use '(:documentation FORM)' to build their docstring. -It should be placed right where the docstring would be, and FORM is then -evaluated (and should return a string) when the closure is built. - -** 'define-inline' provides a new way to define inlinable functions. - -** New function 'macroexpand-1' to perform a single step of macro expansion. - -** Some "x-*" functions were obsoleted and/or renamed: -*** 'x-select-text' is renamed 'gui-select-text'. -*** 'x-selection-value' is renamed 'gui-selection-value'. -*** 'x-get-selection' is renamed 'gui-get-selection'. -*** 'x-get-clipboard' and 'x-clipboard-yank' are marked obsolete. -*** 'x-get-selection-value' is renamed to 'gui-get-primary-selection'. -*** 'x-set-selection' is renamed to 'gui-set-selection'. - -** New function 'string-greaterp', which return the opposite result of -'string-lessp'. - -** The new functions 'string-collate-lessp' and 'string-collate-equalp' -preserve the collation order as defined by the system's locale(1) -environment. For the time being this is implemented for modern POSIX -systems and for MS-Windows, for other systems they fall back to their -counterparts 'string-lessp' and 'string-equal'. - -*** The ls-lisp package uses 'string-collate-lessp' to sort file names. -The effect is that, on systems that use ls-lisp for Dired, the default -sort order of the files in Dired is now different from what it was in -previous versions of Emacs. In particular, the file names are sorted -disregarding punctuation, accents, and diacritics, and letter case is -ignored. For example, files whose name begin with a period will no -longer appear near the beginning of the directory listing. If you -want the old, locale-independent sorting, customize the new option -'ls-lisp-use-string-collate' to the nil value. - -*** The MS-Windows specific variable 'w32-collate-ignore-punctuation', -if set to a non-nil value, causes the above 2 functions to ignore -symbol and punctuation characters when collating strings. This -emulates the behavior of modern Posix platforms when the locale's -codeset is "UTF-8" (as in "en_US.UTF-8"). This is needed because -MS-Windows doesn't support UTF-8 as codeset in its locales. - -** New function 'alist-get', which is a generalized variable -suitable for use with 'setf'. - -** New function 'funcall-interactively', which works like 'funcall' -but makes 'called-interactively-p' treat the function as (you guessed it) -called interactively. - -** New function 'function-put' to use instead of 'put' for function properties. - -** The new function 'bidi-find-overridden-directionality' allows you to -find characters whose directionality was, perhaps maliciously, -overridden by directional override control characters. Lisp programs -can use this to detect potential phishing of URLs and other links that -exploits bidirectional display reordering. - -** The new function 'buffer-substring-with-bidi-context' allows you to -copy a portion of a buffer into a different location while preserving -the visual appearance both of the copied text and the text at -destination, even when the copied text includes mixed bidirectional -text and directional control characters. - -** New properties that can be specified with 'declare': -*** '(interactive-only INSTEAD)', says to use INSTEAD for non-interactive use. -*** '(pure VAL)', if VAL is non-nil, indicates the function is pure. -*** '(side-effect-free VAL)', if VAL is non-nil, indicates the function does not -have side effects. - -** New macro 'with-file-modes', for evaluating expressions with default file -permissions set to temporary values (e.g., for creating private files). - -** You can access the slots of structures using 'cl-struct-slot-value'. - -** Function 'sort' can deal with vectors. - -** Function 'system-name' now returns an updated value if the current -system's name has changed or if the Emacs process has changed systems. -To avoid long waits it no longer consults DNS to canonicalize the name -(in some cases this may affect generated message-id headers - customize -'message-user-fqdn' if this bothers you). The variable 'system-name' -is now obsolete. - -** Function 'write-region' no longer outputs "Wrote FILE" in batch mode. - -** If 'pwd' is called with a prefix argument, insert the current default -directory at point. - -** New functions return extended information about fonts and faces. - -*** The function 'font-info' now returns more details about a font. -In particular, it now returns the average width of the font's -characters, which can be used for geometry-related calculations. - -*** A new function 'default-font-width' returns the average width of a -character in the current buffer's default font. If the default face -is remapped (see 'face-remapping-alist'), the value for the remapped -face is returned. This function complements the existing function -'default-font-height'. - -*** New functions 'window-font-height' and 'window-font-width' return -the height and average width of characters in a specified face and -window. If FACE is remapped (see 'face-remapping-alist'), the -function returns the information for the remapped face. - -*** A new function 'window-max-chars-per-line' returns the maximal -number of characters that can be displayed on one line. If a face -and/or window are provided, these values are used for the -calculation. This function is different from 'window-body-width' in -that it accounts for (i) continuation glyphs, (ii) the size of the -font, and (iii) the specified window. - -** New utilities in subr-x.el: - -*** New macros 'if-let' and 'when-let' allow defining bindings and to -execute code depending whether all values are true. - -*** New macros 'thread-first' and 'thread-last' allow threading a form -as the first or last argument of subsequent forms. - -** Documentation strings now support quoting with curved single quotes -in addition to the old style with grave accent and apostrophe. The -new style looks better on today's displays. In the new Electric Quote -mode, you can enter curved single quotes into documentation by typing -grave accent and apostrophe. Outside Electric Quote mode, you can -enter them by typing 'C-x 8 [' and 'C-x 8 ]', or (if your Alt key -works) by typing 'A-[' and 'A-]'. As described above under -'text-quoting-style', the user can specify how to display doc string -quotes. - -** New function 'format-message' is like 'format' and also converts -curved single quotes, grave accents and apostrophes as per -'text-quoting-style'. - -** 'show-help-function's arg is converted via 'substitute-command-keys' -before being passed to the function. Help strings, help-echo -properties, etc. can therefore contain command key escapes and -quotation marks. - -** Time-related changes: - -*** Time conversion functions now accept an optional ZONE argument -that specifies the time zone rules for conversion. ZONE is omitted or -nil for Emacs local time, t for Universal Time, 'wall' for system wall -clock time, or a string as in the TZ environment variable. The -affected functions are 'current-time-string', 'current-time-zone', -'decode-time', and 'format-time-string'. The function 'encode-time', -which already accepted a simple time zone rule argument, has been -extended to accept all the new forms. - -*** Incompatible change in the third argument of 'format-time-string'. -Previously, any non-nil argument was interpreted as specifying Universal Time. -This is no longer true; packages that want Universal Time should pass t -as the third argument. - -*** Time-related functions now consistently accept numbers -(representing seconds since the epoch) and nil (representing the -current time) as well as the usual list-of-integer representation. -Affected functions include 'current-time-string', 'current-time-zone', -'decode-time', 'float-time', 'format-time-string', 'seconds-to-time', -'time-add', 'time-less-p', 'time-subtract', 'time-to-day-in-year', -'time-to-days', and 'time-to-seconds'. - -*** The 'encode-time-value' and 'with-decoded-time-value' macros have -been obsoleted. - -*** 'calendar-next-time-zone-transition', 'time-add', and -'time-subtract' no longer return time values in the obsolete and -undocumented integer-pair format. Instead, they return a list of two -integers. - -** New function 'set-binary-mode' allows switching a standard stream -of the Emacs process to binary I/O mode. - -** The new function 'directory-name-p' can be used to check whether a file -name (as returned from, for instance, 'file-name-all-completions') is -a directory file name. It returns non-nil if the last character in -the name is a directory separator character (forward slash on GNU and -Unix systems, forward- or backslash on MS-Windows and MS-DOS). - -** ASCII approximations to curved quotes are put in 'standard-display-table' -if the terminal cannot display curved quotes. - -** Standard output and error streams now transliterate characters via -'standard-display-table', and encode output using 'locale-coding-system'. -To force a specific encoding, bind 'coding-system-for-write' to the -coding-system of your choice when invoking functions like 'prin1' and -'message'. - -** New var 'truncate-string-ellipsis' to choose how to indicate truncation. - -** New possible value for 'system-type': 'nacl'. -This is used by Google's Native Client (NaCl). - -** Miscellaneous name change - -For consistency with the usual Emacs spelling, the Lisp variable -'hfy-optimisations' has been renamed to 'hfy-optimizations'. -The old name should still work, as an obsolescent alias. + +* Lisp Changes in Emacs 26.1 -** Changes in Frame- and Window- Handling +** New function undo-amalgamate-change-group to get rid of undo-boundaries +between two states. -*** Emacs can now draw horizontal scroll bars on some platforms that -provide toolkit scroll bars, namely Gtk+, Lucid, Motif and Windows. -Horizontal scroll bars are turned off by default. - -**** New function 'horizontal-scroll-bars-available-p' telling whether -horizontal scroll bars are available on the underlying system. - -**** New mode 'horizontal-scroll-bar-mode' to toggle horizontal scroll -bars on all existing and future frames. +** New var 'definition-prefixes' is a hashtable mapping prefixes to the +files where corresponding definitions can be found. This can be used +to fetch definitions that are not yet loaded, for example for 'C-h f'. -**** New function 'toggle-horizontal-scroll-bar' to toggle horizontal -scroll bars on the selected frame. +** New var syntax-ppss-table to control the syntax-table used in syntax-ppss. -**** New frame parameters 'horizontal-scroll-bars' and -'scroll-bar-height' to set horizontal scroll bars and their height -for individual frames and in 'default-frame-alist'. - -***** The 'horizontal-scroll-bars' parameter was already present and non-nil -by default in Emacs 24 and before (although it didn't have any -effect). This could cause a problem if you share your desktop files -with older versions of Emacs: saving desktop in Emacs before v25.1, -then restoring it in v25.1 would turn on horizontal scroll bars in all -buffers. To resolve this issue, put this in your ~/.emacs init file: - - (modify-all-frames-parameters '((horizontal-scroll-bars . nil))) - -**** New functions 'frame-scroll-bar-height' and -'window-scroll-bar-height' return the height of horizontal scroll -bars on a specific frame or window. ++++ +** 'define-derived-mode' can now specify an :after-hook form, which +gets evaluated after the new mode's hook has run. This can be used to +incorporate configuration changes made in the mode hook into the +mode's setup. -**** 'set-window-scroll-bars' now accepts five parameters where the last -two specify height and type of the window's horizontal scroll bar. +** Autoload files can be generated without timestamps, +by setting 'autoload-timestamps' to nil. +FIXME As an experiment, nil is the current default. +If no insurmountable problems before next release, it can stay that way. -**** 'window-scroll-bars' now returns type and sizes of horizontal scroll -bars too. +--- +** 'gnutls-boot' now takes a parameter :complete-negotiation that says +that negotiation should complete even on non-blocking sockets. -**** New buffer-local variables 'horizontal-scroll-bar' and -'scroll-bar-height'. ++++ +** New functions 'window-pixel-width-before-size-change' and +'window-pixel-height-before-size-change' support detecting which +window changed size when 'window-size-change-functions' are run. -*** New functions 'frame-geometry' and 'frame-edges' give access to a -frame's geometry. ++++ +** New function 'display-buffer-reuse-mode-window' is an action function +suitable for use in 'display-buffer-alist'. For example, to avoid creating +a new window when opening man pages when there's already one, use +(add-to-list 'display-buffer-alist + '("\\`\\*Man .*\\*\\'" . + (display-buffer-reuse-mode-window + (inhibit-same-window . nil) + (mode . Man-mode)))) -*** New functions 'mouse-absolute-pixel-position' and -'set-mouse-absolute-pixel-position' get/set screen coordinates of the -mouse cursor. +--- +** There is now a new variable 'flyspell-sort-corrections-function' +that allows changing the way corrections are sorted. -*** The function 'window-edges' now accepts three additional arguments to -retrieve body, absolute and pixel edges of the window. +--- +** The new command 'fortune-message' has been added, which displays +fortunes in the echo area. -*** The functions 'window-inside-edges', 'window-inside-pixel-edges' and -'window-inside-absolute-pixel-edges' have been renamed to respectively -'window-body-edges', 'window-body-pixel-edges' and -'window-absolute-body-pixel-edges'. The old names are kept as aliases. ++++ +** New function 'func-arity' returns information about the argument list +of an arbitrary function. This generalizes 'subr-arity' for functions +that are not built-in primitives. We recommend using this new +function instead of 'subr-arity'. -*** New function 'window-absolute-pixel-position' to get the screen -coordinates of a visible buffer position. ++++ +** 'parse-partial-sexp' state has a new element. Element 10 is +non-nil when the last character scanned might be the first character +of a two character construct, i.e., a comment delimiter or escaped +character. Its value is the syntax of that last character. -*** The height of a frame's menu and tool bar are no longer counted in the -frame's text height. This means that the text height stands only for -the height of the frame's root window plus that of the echo area (if -present). This was already the behavior for frames with external tool -and menu bars (like in the Gtk builds) but has now been extended to all -builds. ++++ +** 'parse-partial-sexp''s state, element 9, has now been confirmed as +permanent and documented, and may be used by Lisp programs. Its value +is a list of currently open parenthesis positions, starting with the +outermost parenthesis. -*** Frames now do not necessarily preserve the number of columns or lines -they display when setting default font, menu bar, fringe width, or -scroll bars. In particular, maximized and fullscreen frames are -conceptually never resized if such settings change. For fullheight and -fullwidth frames, the behavior may depend on the toolkit used. +--- +** 'read-color' will now display the color names using the color itself +as the background color. -**** New option 'frame-inhibit-implied-resize' if non-nil, means that -setting default font, menu bar, fringe width, or scroll bars of a -specific frame does not resize that frame in order to preserve the -number of columns or lines it displays. +** The function 'redirect-debugging-output' now works on platforms +other than GNU/Linux. -*** New function 'window-preserve-size' allows you to preserve the size of -a window without "fixing" it. It's supported by 'fit-window-to-buffer', -'temp-buffer-resize-mode' and 'display-buffer'. ++++ +** The new function 'string-version-lessp' compares strings by +interpreting consecutive runs of numerical characters as numbers, and +compares their numerical values. According to this predicate, +"foo2.png" is smaller than "foo12.png". -*** New 'display-buffer' action function 'display-buffer-use-some-frame'. -This displays the buffer in an existing frame other than the current -frame, and allows the caller to specify a frame predicate to exclude -frames. ++++ +** The new function 'char-from-name' converts a Unicode name string +to the corresponding character code. -*** New minor mode 'window-divider-mode' and options -'window-divider-default-places', 'window-divider-default-bottom-width' -and 'window-divider-default-right-width'. ++++ +** New functions 'sxhash-eq' and 'sxhash-eql' return hash codes of a +Lisp object suitable for use with 'eq' and 'eql' correspondingly. If +two objects are 'eq' ('eql'), then the result of 'sxhash-eq' +('sxhash-eql') on them will be the same. -*** When a window is shrunk horizontally its margins are no longer removed -automatically. Rather, Emacs refuses to split or resize windows when -this would cause margins to no longer fit into the width reserved for the -corresponding window. An application can override this behavior for a -particular window by setting that window's 'min-margins' parameter. As -a consequence, the application becomes fully responsible for trimming -the margin sizes of that window and any window inheriting these margins. ++++ +** Function 'sxhash' has been renamed to 'sxhash-equal' for +consistency with the new functions. For compatibility, 'sxhash' +remains as an alias to 'sxhash-equal'. -*** The window displaying the '*Completions*' buffer with minibuffer -completion candidates is now shown at the bottom of the selected -frame. The size of that window is always as large as required to -display all the candidates, except when limited by the minimum size -of the other windows on that frame; those other windows are resized -to provide space for the '*Completions*' display. The Emacs manual -describes how to customize 'display-buffer-alist' to get back the old -behavior, see the node "Temporary Displays" there. ++++ +** Time conversion functions that accept a time zone rule argument now +allow it to be OFFSET or a list (OFFSET ABBR), where the integer +OFFSET is a count of seconds east of Universal Time, and the string +ABBR is a time zone abbreviation. The affected functions are +'current-time-string', 'current-time-zone', 'decode-time', +'format-time-string', and 'set-time-zone-rule'. -** Tearoff menus and detachable toolbars for Gtk+ have been removed. -Those features have been deprecated in Gtk+ for a long time. ++++ +*** New basic face 'fixed-pitch-serif', for a fixed-width font with serifs. +The Info-quoted and tex-verbatim faces now default to inheriting from it. -** Etags +** New built-in function 'mapcan' which avoids unnecessary consing (and garbage +collection). -*** etags no longer qualifies class members by default. ++++ +** The new functions 'make-nearby-temp-file' and 'temporary-file-directory' +can be used for creation of temporary files of remote or mounted directories. -By default, 'etags' will not qualify class members for Perl and C-like -object-oriented languages with their class names and namespaces, and -will remove qualifications used explicitly in the code from the tag -names it puts in TAGS files. This is so the etags.el back-end for -'xref-find-definitions' is more accurate and produces less false -positives. - -Use --class-qualify (-Q) if you want the old default behavior of -qualifying class members in C++, Java, Objective C, and Perl. Note -that using -Q might make some class members become "unknown" to 'M-.' -('xref-find-definitions'); if so, you can use 'C-u M-.' to specify the -qualified names by hand. +** Changes in Frame- and Window- Handling -*** New language Ruby - -Names of modules, classes, methods, functions, and constants are -tagged. Overloaded operators are also tagged. ++++ +*** Support for side windows is now official. The display action +function `display-buffer-in-side-window' will display its buffer in a +side window. Functions for toggling all side windows on a frame, +changing and reversing the layout of side windows and returning the main +(major non-side) window of a frame are provided. For details consult +the section "Side Windows" in the Elisp manual. -*** New language Go -Names of packages, functions, and types are tagged. ++++ +*** New `display-buffer' alist entry `window-parameters' allows to +assign window parameters to the window used for displaying the buffer. -*** Improved support for Lua - -Etags now tags functions even if the "function" keyword follows some -whitespace at line beginning. ++++ +*** New window parameter `no-delete-other-window' prevents that +its window gets deleted by `delete-other-windows'. ++++ +*** New command `window-swap-states' swaps the states of two live +windows. -* Changes in Emacs 25.1 on Non-Free Operating Systems - -** MS-Windows specific Emacs build scripts are no longer in the distribution. -This includes the makefile.w32-in files in various subdirectories, and -the support files. The file nt/configure.bat now just tells the user -to use the procedure described in nt/INSTALL, by running the Posix -'configure' script in the top-level directory. - -** Building Emacs for MS-Windows requires at least Windows XP -or Windows Server 2003. The built binaries still run on all versions -of Windows starting with Windows 9X. +* Changes in Emacs 26.1 on Non-Free Operating Systems + +** Intercepting hotkeys on Windows 7 and later now works better. +The new keyboard hooking code properly grabs system hotkeys such as +Win-* and Alt-TAB, in a way that Emacs can get at them before the +system. This makes the 'w32-register-hot-key' functionality work +again on all versions of MS-Windows starting with Windows 7. On +Windows NT and later you can now register any hotkey combination. (On +Windows 9X, the previous limitations, spelled out in the Emacs manual, +still apply.) + +** 'convert-standard-filename' no longer mirrors slashes on MS-Windows. +Previously, on MS-Windows this function converted slash characters in +file names into backslashes. It no longer does that. If your Lisp +program used 'convert-standard-filename' to prepare file names to be +passed to subprocesses (which is not the recommended usage of that +function), you will now have to mirror slashes in your application +code. One possible way is this: + + (let ((start 0)) + (while (string-match "/" file-name start) + (aset file-name (match-beginning 0) ?\\) + (setq start (match-end 0)))) + +** GUI sessions now treat SIGINT like Posix platforms do. +The effect of delivering a Ctrl-C (SIGINT) signal to a GUI Emacs on +MS-Windows is now the same as on Posix platforms -- Emacs saves the +session and exits. In particular, this will happen if you start +emacs.exe from the Windows shell, then type Ctrl-C into that shell's +window. -** Emacs running on MS-Windows now supports the daemon mode. - -** The byte counts in etags-generated TAGS files are now the same on -MS-Windows as they are on other platforms. - -** On OS X, configure creates a Cocoa ("Nextstep") build by default. -Pass '--without-ns' to configure to create an X11 build, the old default. - -** OS X 10.5 or older is no longer supported. - -** OS X on PowerPC is no longer supported. - -** New variable 'ns-use-fullscreen-animation' controls animation for -non-native NS fullscreen. The default is nil. Set to t to enable -animation when entering and leaving fullscreen. For native OSX fullscreen -this has no effect. - -** On the OS X Cocoa ("Nextstep") port, multicolor font (such as color -emoji) display is disabled. This feature was accidentally added when -Emacs 24.4 included the new Core Text based font backend code that was -originally implemented for a non-mainline port. This will be enabled -again once it is also implemented in Emacs on free operating systems. -If some symbols, such as emoji, do not display, we suggest to install -an appropriate font, such as Symbola; then they will be displayed, -albeit without the color effects. - -** The new function 'w32-application-type' returns the type of an -MS-Windows application given the name of its executable program file. - -** New variable 'w32-pipe-buffer-size'. -It can be used to tune the size of the buffer of pipes created for -communicating with subprocesses, when the program run by a subprocess -exhibits unusual buffering behavior. Default is zero, which lets the -OS use its default size. +--- +** 'signal-process' supports SIGTRAP on Windows XP and later. +The 'kill' emulation on Windows now maps SIGTRAP to a call to the +'DebugBreakProcess' API. This causes the receiving process to break +execution and return control to the debugger. If no debugger is +attached to the receiving process, the call is typically ignored. +This is in contrast to the default action on POSIX Systems, where it +causes the receiving process to terminate with a core dump if no +debugger has been attached to it. ---------------------------------------------------------------------- |