GNU Emacs NEWS -- history of user-visible changes. Copyright (C) 2014-2015 Free Software Foundation, Inc. See the end of the file for license conditions. Please send Emacs bug reports to bug-gnu-emacs@gnu.org. If possible, use M-x report-emacs-bug. This file is about changes in Emacs version 25. 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. You can narrow news to a specific version by calling `view-emacs-news' with a prefix argument or by typing C-u C-h C-n. Temporary note: +++ indicates that all 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, otherwise leave it unmarked. * Installation Changes in Emacs 25.1 +++ ** Building Emacs now requires C99 or later. ** Building Emacs now requires GNU make, version 3.81 or later. ** 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. ** 'configure' now prefers gnustep-config when configuring GNUstep. If gnustep-config is not available, the old heuristics are used. --- ** 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 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. --- ** 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. * Startup Changes in Emacs 25.1 * Changes in Emacs 25.1 ** New command `comment-line' bound to `C-x C-;'. ** New function `custom-prompt-customize-unsaved-options' checks for unsaved customizations and prompts user to customize (if found). +++ ** 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. --- ** The new M-s M-w key binding uses eww to search the web for the text in the region. ** M-x suggests shorthands and ignores obsolete commands for completion. ** x-select-enable-clipboard is renamed select-enable-clipboard. x-select-enable-primary and 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. +++ ** terpri gets an optional arg ENSURE to conditionally output a newline. +++ ** New macro `define-advice'. ** `insert-register' now leaves point after the inserted text when called interactively. A prefix argument toggles this behavior. ** New var `truncate-string-ellipsis' to choose how to indicate truncation. +++ ** 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 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. If you want the old, locale-independent sorting, customize the new option `ls-lisp-use-string-collate' to a 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. +++ ** The new function `bidi-find-overridden-directionality' allows 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 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 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. ** A new text property `inhibit-read-only' can be used in read-only buffers to allow certain parts of the text to be writable. ** A new function `directory-files-recursively' returns all matching files (recursively) under a directory. ** 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 forward slash. +++ ** 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. ** 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 possible value for `system-type': nacl. +++ ** New variable `inhibit-message', when bound to non-nil, inhibits `message' and related functions from displaying messages the Echo Area. The output is still logged to the *Messages* buffer. +++ ** 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. * Editing Changes in Emacs 25.1 ** Successive single-char deletions are collapsed in the undo-log just like successive char insertions. ** Unicode names entered via C-x 8 RET now use substring completion by default. ** C-x 8 now has shorthands for these chars: ‐ ‑ ‒ – — ― ‘ ’ “ ” † ‡ • ′ ″ € № ← → ↔ − ≈ ≠ ≤ ≥. As before, you can type C-x 8 C-h to list shorthands. ** New minor mode global-eldoc-mode is enabled by default. ** Emacs now supports "bracketed paste mode" when running on a terminal that supports it. This facility allows Emacs to understand pasted chunks of text as strings to be inserted, instead of interpreting each character in the pasted text as actual user input. This results in a paste experience similar to that under a window system, and significant performance improvements when pasting large amounts of text. ** 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 and 7.0, and a few changes suggested for 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. +++ ** New buffer-local `electric-pair-local-mode'. * Changes in Specialized Modes and Packages in Emacs 25.1 ** New `xterm-screen-extra-capabilities' config. ** The `save-place' variable is replaced by a `save-place-mode'. ** ERC *** Hide message types by network or channel. `erc-hide-list' will hide all messages of the specified type, where `erc-network-hide-list' and `erc-channel-hide-list' will only hide the specified message types for the respective specified targets. ** Midnight-mode *** `midnight-mode' is a proper minor mode. *** clean-buffer-*-regexps can now specify buffers via predicate functions. ** In xterms, 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). ** xterm-mouse-mode now supports mouse-tracking (if your xterm supports it). ** package.el *** 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. 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. *** 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'. *** `package-menu-hide-obsolete' 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. *** When filtering the package menu, keywords starting with "arc:" or "status:" represent package archive or status, respectively, instead of actual keywords. *** Most functions which involve downloading information now take an ASYNC argument. If it is non-nil, package.el performs the download(s) asynchronously. *** New variable `package-menu-async' controls whether the package-menu uses asynchronous downloads. *** `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. *** Packages which are dependencies of other packages cannot be deleted. The FORCE argument to `package-delete' overrides this. *** 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. *** New command `package-install-user-selected-packages' installs all packages from `package-selected-packages' which are currently missing. *** New command `package-autoremove' removes all packages which were installed strictly as dependencies but are no longer needed. ** Shell 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 -list-p and -child-p functions are declared obsolete. +++ *** The variables are declared obsolete. +++ *** The variables are declared obsolete. *** defgeneric and defmethod are declared obsolete. +++ *** `constructor' is now an obsolete alias for `make-instance'. ** 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. ** Minibuffer *** You can use and keys to move point in the multi-line minibuffer just as in an ordinary buffer. Only when point moves over the bottom/top of the minibuffer it goes to the next/previous history element. The new commands bound to and in the minibuffer: `next-line-or-history-element' and `previous-line-or-history-element'. ** Search and Replace *** 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. ** ElDoc *** New minor mode `global-eldoc-mode' *** `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. ] [, ] [, ] [, etc.) while using mono-spaced font. ** 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 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. --- *** You can now use several eww buffers in parallel by renaming eww buffers you want to keep separate. +++ *** Partial state of the eww buffers (the URIs and the titles of the pages visited) is now preserved in the desktop file. +++ *** `eww-after-render-hook' is now called after eww has rendered the data in the buffer. --- *** The `eww-reload' command now takes a prefix to not reload via the net, but just use the local copy of the HTML. +++ *** 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 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. ** pcase *** New UPatterns `quote', `app', `cl-struct', and `eieio'. *** New UPatterns can be defined with `pcase-defmacro'. +++ *** New vector QPattern. ** Lisp mode *** Strings after `:documentation' are highlighted as docstrings. ** 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, which should be used instead of font-lock-fontify-buffer when called from Elisp. ** Macro `minibuffer-with-setup-hook' takes (:append FUN) to mean appending FUN to `minibuffer-setup-hook'. ** cl-lib *** New functions cl-fresh-line, cl-digit-char-p and cl-parse-integer. ** seq *** New seq library: 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. ** Calendar and diary +++ *** 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. --- *** 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: **** Functions `calendar-one-frame-setup', `calendar-only-one-frame-setup', `calendar-two-frame-setup', `european-calendar', `american-calendar'. **** Hooks `cal-menu-load-hook', `cal-x-load-hook'. **** Macro `calendar-for-loop'. **** Variables `european-calendar-style', `diary-face', `hebrew-holidays-{1,4}'. **** The nil and list forms of `diary-display-function'. ** New ERT function `ert-summarize-tests-batch-and-exit'. ** New js.el option `js-indent-first-init'. --- ** `Info-fontify-maximum-menu-size' can be t for no limit. +++ ** `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. --- ** ntlm.el has support for NTLM2. --- ** The Rmail commands d, C-d and u now handle repeat counts to delete or undelete multiple messages. ** 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. ** SES now supports local printer functions; see `ses-define-local-printer'. ** 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). ** TLS --- *** Fatal TLS errors are now silent by default. ** 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. *** 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 "nc", which allows to access dumb busyboxes. ** SQL mode *** New user variable `sql-default-directory' enables remote connections using Tramp. *** New command `sql-send-line-and-next' sends the current line to the interactive buffer and advances to the next line, skipping whitespace and comments. *** Add support for Vertica SQL. ** 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. *** 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. *** `compare-windows' now compares text with the most recently used window instead of the next window. The new option `compare-windows-get-window-function' allows to customize this. *** Two new faces `compare-windows-removed' and `compare-windows-added' replace the obsolete face `compare-windows'. --- *** `log-edit-insert-changelog' converts "(tiny change)" to "Copyright-paperwork-exempt: yes". Set `log-edit-rewrite-tiny-change' nil to disable this. ** VHDL mode 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. ** HideIfDef mode now support full C/C++ expressions, argumented macro expansions, interactive macro evaluation and automatic scanning of #defined symbols. *** New custom variable `hide-ifdef-header-regexp' to define C/C++ header file name patterns. Default case-insensitive .h, .hh, .hpp and .hxx. *** New custom variable `hide-ifdef-expand-reinclusion-protection' to prevent reinclusion protected header files from being fully hidden. *** New custom variable `hide-ifdef-exclude-define-regexp' to define symbol name patterns (e.x. all "FOR_DOXYGEN_ONLY_*") to be excluded. ** TeX mode *** New custom variable `tex-print-file-extension' to help users who use PDF instead of DVI. ** whitespace-mode: new 'big-indent style highlighting too much indentation. By default, 32 spaces and four TABs are considered to be too much but `whitespace-big-indent-regexp' can be configured to change that. ** tildify: `tildify-space-string', `tildify-pattern', and `tildify-foreach-region-function' variables added making `tildify-string-alist', `tildify-pattern-alist', and `tildify-ignored-environments-alist' variables (as well as a few helper functions) obsolete. ** xref The new package provides generic framework and new commands to find and move to definitions, as well as pop back to the original location. *** New key bindings `xref-find-definitions' replaces `find-tag' and provides an interface to pick one destination among several. Hence, `tags-loop-continue' is unbound. `xref-pop-marker-stack' replaces `pop-tag-mark', but uses an easier binding, which is now unoccupied (`M-,'). `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'. *** 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 to mutate it instead. ** etags As a result of the above, these commands are now obsolete: `find-tag-other-window', `find-tag-other-frame', `find-tag-regexp', `tags-apropos' and `tags-loop-continue'. ** 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 ". *** 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. ** 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 '#', which is equivalent to '#'. 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 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. ** Obsolete packages --- *** gulp.el +++ ** 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. * New Modes and Packages in Emacs 25.1 ** cl-generic.el provides CLOS-style multiple-dispatch generic functions. ** scss-mode (a minor variant of css-mode) ** 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 to automatically insert 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. * Incompatible Lisp Changes in Emacs 25.1 ** 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. ** Comint, term, and compile do not set the EMACS env var any more. Use the INSIDE_EMACS environment variable instead. ** `save-excursion' does not save&restore the mark any more. ** read-buffer-function can now be called with a 4th argument (`predicate'). ** completion-table-dynamic stays in the minibuffer. If you want the old behavior of calling the function in the buffer from which the minibuffer was entered, call it with the new argument `switch-buffer'. ** 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. +++ ** 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 `diff' command uses the unified format now. To restore the old behavior, set `diff-switches' to `-c'. * Lisp Changes in Emacs 25.1 ** The default value of `load-read-function' is now `read'. ** New hook `pre-redisplay-functions', a bit easier to use than pre-redisplay-function. ** The second arg of `looking-back' should always be provided explicitly. ** Obsolete text properties `intangible', `point-entered', and `point-left'. Replaced by properties `cursor-intangible' and `cursor-sensor-functions', implemented by the new `cursor-intangible-mode' and `cursor-sensor-mode' minor modes. ** 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'). ** `read-buffer' takes a new `predicate' argument. ** Emacs Lisp now supports generators. ** New finalizer facility for running code when objects become unreachable. ** lexical closures can use (:documentation
) to build their docstring. It should be placed right where the docstring would be, and 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 macroexpansion. ** Some "x-*" were obsoleted: *** 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 `alist-get', which is also a valid place (aka lvalue). ** 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. +++ ** 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'. ** Functions `rmail-delete-forward' and `rmail-delete-backward' take an optional repeat-count argument. ** 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, and to avoid long waits it no longer consults DNS to canonicalize the name. 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 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. +++ ** Time-related changes: *** 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 to switch a standard stream of the Emacs process to binary I/O mode. ** 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. * Changes in Frames and Windows Code in Emacs 25.1 +++ ** 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 function `toggle-horizontal-scroll-bar' to toggle horizontal scroll bars on the selected frame. *** 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'. *** New functions `frame-scroll-bar-height' and `window-scroll-bar-height' return the height of horizontal scroll bars on a specific frame or window. *** `set-window-scroll-bars' now accepts five parameters where the last two specify height and type of the window's horizontal scroll bar. *** `window-scroll-bars' now returns type and sizes of horizontal scroll bars too. *** New buffer-local variables `horizontal-scroll-bar' and `scroll-bar-height'. +++ ** 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. +++ ** 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. *** 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. +++ ** New function `window-preserve-size' allows to preserve the size of windows without "fixing" it. It's supported by `fit-window-to-buffer', `temp-buffer-resize-mode' and `display-buffer'. +++ ** New option `switch-to-buffer-in-dedicated-window' allows to customize how `switch-to-buffer' proceeds interactively when the selected window is strongly dedicated to its buffer. ** Tearoff menus and detachable toolbars for Gtk+ has been removed. Those features have been deprecated in Gtk+ for a long time. * Changes in Emacs 25.1 on Non-Free Operating Systems --- ** 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. +++ ** Emacs running on MS-Windows now supports the daemon mode. ** OS X 10.5 or older is no longer supported. ** OS X on PowerPC is no longer supported. ---------------------------------------------------------------------- This file is part of GNU Emacs. GNU Emacs is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. GNU Emacs is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Emacs. If not, see . Local variables: coding: utf-8 mode: outline paragraph-separate: "[ ]*$" end: