1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2014-2015 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 25.
11 See files NEWS.24, NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that all necessary documentation updates are complete.
19 (This means all relevant manuals in doc/ AND lisp doc-strings.)
20 --- means no change in the manuals is needed.
21 When you add a new item, use the appropriate mark if you are sure it applies,
22 otherwise leave it unmarked.
25 * Installation Changes in Emacs 25.1
28 ** Building Emacs now requires C99 or later.
30 ** Building Emacs now requires GNU make, version 3.81 or later.
32 ** New configure option --with-cairo.
33 Maybe add text based on http://lists.gnu.org/archive/html/emacs-devel/2015-05/msg00689.html
35 ** By default, Emacs no longer works on IRIX. We expect that Emacs
36 users are not affected by this, as SGI stopped supporting IRIX in
37 December 2013. If you are affected, please send a bug report. You
38 should be able to work around the problem either by porting the Emacs
39 undumping code to GCC under IRIX, or by configuring --with-wide-int,
40 or by sticking with Emacs 24.4.
42 ** 'configure' now prefers gnustep-config when configuring GNUstep.
43 If gnustep-config is not available, the old heuristics are used.
46 ** 'configure' now prefers inotify to gfile for file notification,
47 unless gfile is explicitly requested via --with-file-notification='gfile'.
50 ** The configure option '--with-pkg-config-prog' has been removed.
51 Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to.
54 ** The configure option '--with-mmdf' has been removed.
55 It was no longer useful, as it relied on libraries that are no longer
56 supported, and its presence led to confusion during configuration.
57 This affects only the 'movemail' utility; Emacs itself can still
58 process MMDF-format files as before.
60 ** The configure option '--enable-silent-rules' is now the default,
61 and silent rules are now quieter. To get the old behavior where
62 'make' chatters a lot, configure with '--disable-silent-rules' or
63 build with 'make V=1'.
66 ** The configure option '--with-gameuser' now allows to specify a
67 group instead of a user if its argument is prefixed by ':' (a colon).
68 This will cause the game score files in ${localstatedir}/games/emacs
69 to be owned by that group, and the helper program for updating them to
70 be installed setgid. The option now defaults to the 'games' group.
73 ** The `grep-changelog' script (and its manual page) are no longer included.
74 It has no particular connection to Emacs and has not changed in years,
75 so if you want to use it, you can always take a copy from an older Emacs.
78 * Startup Changes in Emacs 25.1
81 ** When Emacs is given a file as a command line argument and
82 `initial-buffer-choice' is non-nil, display both the file and
83 `initial-buffer-choice'. When Emacs is given more than one file and
84 `initial-buffer-choice' is non-nil, show `initial-buffer-choice'
85 and *Buffer List*. This makes Emacs convenient to use from the
86 command line when `initial-buffer-choice' is non-nil.
89 * Changes in Emacs 25.1
91 ** New display-buffer action function display-buffer-use-some-frame
92 This displays the buffer in an existing frame other than the current
93 frame, and allows the caller to specify a frame predicate to exclude
96 ** New doc command `describe-symbol'. Works for functions, vars, faces, etc...
98 ** `isearch' and `query-replace' now perform character folding in matches.
99 This is analogous to case-folding, but applies between Unicode
100 characters and their ASCII counterparts. This means many characters
101 will match entire groups of characters.
103 For instance, the " will match all variants of unicode double quotes
104 (like “ and ”), and the letter a will match all of its accented
105 cousins, even those composed of multiple characters, as well as many
106 other symbols like ℀, ℁, ⒜, and ⓐ.
108 ** New function `character-folded-regexp' can be used
109 by searching commands to produce a a regexp matching anything that
110 character-folds into STRING.
112 ** New command `checkdoc-package-keywords' checks if the
113 current package keywords are recognized. Set the new option
114 `checkdoc-package-keywords-flag' to non-nil to make
115 `checkdoc-current-buffer' call this function automatically.
117 ** New function `checkdoc-file' checks for style errors.
118 It's meant for use together with `compile':
119 emacs -batch --eval "(checkdoc-file \"subr.el\")"
121 ** New command `comment-line' bound to `C-x C-;'.
123 ** New function `custom-prompt-customize-unsaved-options' checks for
124 unsaved customizations and prompts user to customize (if found).
127 ** Network security (TLS/SSL certificate validity and the like) is
128 added via the new Network Security Manager (NSM) and controlled via
129 the `network-security-level' variable.
131 ** C-h l now also lists the commands that were run.
134 ** The new M-s M-w key binding uses eww to search the web for the
137 ** M-x suggests shorthands and ignores obsolete commands for completion.
138 ** x-select-enable-clipboard is renamed select-enable-clipboard.
139 x-select-enable-primary and renamed select-enable-primary.
140 Additionally they both now apply to all systems (OSX, GNUstep, Windows, you
141 name it), with the proviso that on some systems (e.g. Windows)
142 select-enable-primary is ineffective since the system doesn't
143 have the equivalent of a primary selection.
146 ** terpri gets an optional arg ENSURE to conditionally output a newline.
149 ** New macro `define-advice'.
151 ** `insert-register' now leaves point after the inserted text
152 when called interactively. A prefix argument toggles this behavior.
154 ** New var `truncate-string-ellipsis' to choose how to indicate truncation.
157 ** The new variable `term-file-aliases' replaces some files from lisp/term.
158 The function `tty-run-terminal-initialization' consults this variable
159 when deciding what terminal-specific initialization code to run.
162 ** New variable `system-configuration-features', listing some of the
163 main features that Emacs was compiled with. This is mainly intended
164 for use in Emacs bug reports.
167 ** A password is now hidden also when typed in batch mode. Another
168 hiding character but the default `.' can be used by let-binding the
169 variable `read-hide-char'.
171 ** The new functions `string-collate-lessp' and `string-collate-equalp'
172 preserve the collation order as defined by the system's locale(1)
173 environment. For the time being this is implemented for modern POSIX
174 systems and for MS-Windows, for other systems they fall back to their
175 counterparts `string-lessp' and `string-equal'.
177 *** The ls-lisp package uses `string-collate-lessp' to sort file names.
178 If you want the old, locale-independent sorting, customize the new
179 option `ls-lisp-use-string-collate' to a nil value.
181 *** The MS-Windows specific variable `w32-collate-ignore-punctuation',
182 if set to a non-nil value, causes the above 2 functions to ignore
183 symbol and punctuation characters when collating strings. This
184 emulates the behavior of modern Posix platforms when the locale's
185 codeset is "UTF-8" (as in "en_US.UTF-8"). This is needed because
186 MS-Windows doesn't support UTF-8 as codeset in its locales.
189 ** The new function `bidi-find-overridden-directionality' allows to
190 find characters whose directionality was, perhaps maliciously,
191 overridden by directional override control characters. Lisp programs
192 can use this to detect potential phishing of URLs and other links that
193 exploits bidirectional display reordering.
196 ** The new function `buffer-substring-with-bidi-context' allows to
197 copy a portion of a buffer into a different location while preserving
198 the visual appearance both of the copied text and the text at
199 destination, even when the copied text includes mixed bidirectional
200 text and directional control characters.
202 ** New variable `ns-use-fullscreen-animation' controls animation for
203 non-native NS fullscreen. The default is nil. Set to t to enable
204 animation when entering and leaving fullscreen. For native OSX fullscreen
207 ** A new text property `inhibit-read-only' can be used in read-only
208 buffers to allow certain parts of the text to be writable.
210 ** A new function `directory-files-recursively' returns all matching
211 files (recursively) under a directory.
213 ** The new function `directory-name-p' can be used to check whether a file
214 name (as returned from, for instance, `file-name-all-completions' is
215 a directory file name. It returns non-nil if the last character in
216 the name is a forward slash.
219 ** New variable `fast-but-imprecise-scrolling' inhibits
220 fontification during full screen scrolling operations, giving less
221 hesitant operation during auto-repeat of C-v, M-v at the cost of
222 possible inaccuracies in the end position.
224 ** The function `font-info' now returns more details about a font.
225 In particular, it now returns the average width of the font's
226 characters, which can be used for geometry-related calculations.
228 ** A new function `default-font-width' returns the average width of a
229 character in the current buffer's default font. If the default face
230 is remapped (see `face-remapping-alist'), the value for the remapped
231 face is returned. This function complements the existing function
232 `default-font-height'.
234 ** New functions `window-font-height' and `window-font-width' return
235 the height and average width of characters in a specified face and
236 window. If FACE is remapped (see `face-remapping-alist'), the
237 function returns the information for the remapped face.
239 ** A new function `window-max-chars-per-line' returns the maximal
240 number of characters that can be displayed on one line. If a face
241 and/or window are provided, these values are used for the
242 calculation. This function is different from `window-body-width' in
243 that it accounts for (i) continuation glyphs, (ii) the size of the
244 font, and (iii) the specified window.
246 ** New possible value for `system-type': nacl.
249 ** New variable `inhibit-message', when bound to non-nil, inhibits
250 `message' and related functions from displaying messages the Echo
251 Area. The output is still logged to the *Messages* buffer.
254 ** It is now safe for a mode that derives `tabulated-list-mode' to not
255 call `tabulated-list-init-header', in which case it will have no
259 ** `tabulated-list-print' takes a second optional argument, update,
260 which specifies an alternative printing method which is faster when
261 few or no entries have changed.
264 * Editing Changes in Emacs 25.1
266 ** Successive single-char deletions are collapsed in the undo-log just like
267 successive char insertions.
269 ** Unicode names entered via C-x 8 RET now use substring completion by default.
271 ** C-x 8 now has shorthands for these chars: ‐ ‑ ‒ – — ― ‘ ’ “ ” † ‡ • ′ ″
272 € № ← → ↔ − ≈ ≠ ≤ ≥. As before, you can type C-x 8 C-h to list shorthands.
274 ** New minor mode electric-quote-mode for quoting ‘like this’ and “like this”
277 ** New minor mode global-eldoc-mode is enabled by default.
279 ** Emacs now supports "bracketed paste mode" when running on a terminal
280 that supports it. This facility allows Emacs to understand pasted
281 chunks of text as strings to be inserted, instead of interpreting each
282 character in the pasted text as actual user input. This results in a
283 paste experience similar to that under a window system, and significant
284 performance improvements when pasting large amounts of text.
286 ** Emacs now supports the latest version of the UBA.
287 The Emacs implementation of the Unicode Bidirectional Algorithm (UBA)
288 was updated to support all the latest additions and changes introduced
289 in Unicode Standard versions 6.3, 7.0, and the latest Unicode 8.0.
290 This includes full support for directional isolates and the
291 Bidirectional Parentheses Algorithm (BPA) specified by these Unicode
294 ** You can access `mouse-buffer-menu' (C-down-mouse-1) using C-f10.
297 ** New buffer-local `electric-pair-local-mode'.
300 * Changes in Specialized Modes and Packages in Emacs 25.1
302 ** Prog mode has some support for multi-mode indentation.
303 See `prog-indentation-context' and `prog-widen'.
305 ** Prettify Symbols mode supports custom composition predicates. By
306 overriding the default `prettify-symbols-compose-predicate', modes can
307 specify in which contexts a symbol map be composed to some unicode
308 character. `prettify-symbols-default-compose-p' is the default which
309 is suitable for most programming languages such as C or Lisp (but not
312 ** New `xterm-screen-extra-capabilities' config.
314 ** The `save-place' variable is replaced by a `save-place-mode'.
318 *** Hide message types by network or channel. `erc-hide-list' will
319 hide all messages of the specified type, where `erc-network-hide-list'
320 and `erc-channel-hide-list' will only hide the specified message types
321 for the respective specified targets.
324 *** `midnight-mode' is a proper minor mode.
325 *** clean-buffer-*-regexps can now specify buffers via predicate functions.
327 ** In xterms, killing text now also sets the CLIPBOARD/PRIMARY selection
328 in the surrounding GUI (using the OSC-52 escape sequence). This only works
329 if your xterm supports it and enables the `allowWindowOps' options (disabled
330 by default at least in Debian, for security reasons).
332 Similarly, you can yank the CLIPBOARD/PRIMARY selection (using the OSC-52
333 escape sequence) if your xterm has the feature enabled but for that you
334 additionally need to add `getSelection' to `xterm-extra-capabilities'.
336 ** xterm-mouse-mode now supports mouse-tracking (if your xterm supports it).
340 *** New "external" package status.
341 An external package is any installed package that's not built-in and
342 not from `package-user-dir', which usually means it's from an entry in
343 `package-directory-list'. They are treated much like built-in
344 packages, in that they cannot be deleted through the package menu and
345 are not considered for upgrades.
347 The effect, is that a user can manually place a specific version of a
348 package inside `package-directory-list' and the package menu will
351 *** If a package is available on multiple archives and one has higher
352 priority (as per `package-archive-priorities') only that one is
353 listed. This can be configured with `package-menu-hide-low-priority'.
355 *** `package-menu-toggle-hiding' now toggles the hiding of packages.
356 This includes the above-mentioned low-priority packages, as well as
357 available packages whose version is lower than the currently installed
358 version (which were previously impossible to display).
359 This allows users to downgrade a package if a lower version is
362 *** When filtering the package menu, keywords starting with "arc:" or
363 "status:" represent package archive or status, respectively, instead
366 *** Most functions which involve downloading information now take an
367 ASYNC argument. If it is non-nil, package.el performs the download(s)
370 *** New variable `package-menu-async' controls whether the
371 package-menu uses asynchronous downloads.
373 *** `package-install-from-buffer' and `package-install-file' work on directories.
374 This follows the same rules as installing from a .tar file, except the
375 -pkg file is optional.
377 *** Packages which are dependencies of other packages cannot be deleted.
378 The FORCE argument to `package-delete' overrides this.
380 *** New custom variable `package-selected-packages' tracks packages
381 which were installed by the user (as opposed to installed as
382 dependencies). This variable can also be manually customized.
384 *** New command `package-install-user-selected-packages' installs all
385 packages from `package-selected-packages' which are currently missing.
387 *** New command `package-autoremove' removes all packages which were
388 installed strictly as dependencies but are no longer needed.
392 When you invoke `shell' interactively, the *shell* buffer will now
393 display in a new window. However, you can customize this behavior via
394 the `display-buffer-alist' variable. For example, to get
395 the old behavior -- *shell* buffer displays in current window -- use
396 (add-to-list 'display-buffer-alist
397 '("^\\*shell\\*$" . (display-buffer-same-window))).
402 *** The `:protection' slot option is not obeyed any more.
404 *** The `newname' argument to constructors is optional&deprecated.
405 If you need your objects to be named, do it by inheriting from `eieio-named'.
407 *** The <class>-list-p and <class>-child-p functions are declared obsolete.
409 *** The <class> variables are declared obsolete.
411 *** The <initarg> variables are declared obsolete.
412 *** defgeneric and defmethod are declared obsolete.
414 *** `constructor' is now an obsolete alias for `make-instance'.
417 *** New command `ido-bury-buffer-at-head' bound to C-S-b
418 Bury the buffer at the head of `ido-matches', analogous to how C-k
419 kills the buffer at head.
420 *** A prefix argument to `ido-restrict-to-matches' will reverse its
421 meaning, and the list is restricted to those elements that do not
422 match the current input.
426 *** You can use <up> and <down> keys to move point in the multi-line
427 minibuffer just as in an ordinary buffer. Only when point moves over
428 the bottom/top of the minibuffer it goes to the next/previous history
429 element. The new commands bound to <up> and <down> in the minibuffer:
430 `next-line-or-history-element' and `previous-line-or-history-element'.
432 ** Search and Replace
434 *** Query-replace history is enhanced.
435 When query-replace reads the FROM string from the minibuffer, typing
436 `M-p' will now show previous replacements as "FROM SEP TO", where FROM
437 and TO are the original text and its replacement, and SEP is an arrow
438 string defined by the new variable `query-replace-from-to-separator'.
439 To select a prior replacement, type `M-p' until the desired
440 replacement appears in the minibuffer, and then exit the minibuffer by
445 *** If `quick-calc' is called with a prefix argument, insert the
446 result of the calculation into the current buffer.
449 *** New minor mode `global-eldoc-mode'
450 *** `eldoc-documentation-function' now defaults to `ignore'
451 *** `describe-char-eldoc' displays information about character at point,
452 and can be used as a default value of `eldoc-documentation-function'. It is
453 useful when, for example, one needs to distinguish various spaces (e.g. ] [,
454 ] [, ] [, etc.) while using mono-spaced font.
459 *** HTML can now be rendered using variable-width fonts.
462 *** A new command `F' (`eww-toggle-fonts') can be used to toggle
463 whether to use variable-pitch fonts or not. The user can also
464 customize the `shr-use-fonts' variable.
467 *** A new command `R' (`eww-readable') will try do identify the main
468 textual parts of a web page and display only that, leaving menus and
469 the like off the page.
472 *** You can now use several eww buffers in parallel by renaming eww
473 buffers you want to keep separate.
476 *** Partial state of the eww buffers (the URIs and the titles of the
477 pages visited) is now preserved in the desktop file.
480 *** `eww-after-render-hook' is now called after eww has rendered
481 the data in the buffer.
484 *** The `eww-reload' command now takes a prefix to not reload via
485 the net, but just use the local copy of the HTML.
488 *** The DOM shr and eww uses has been changed to the general Emacs
489 xml.el/libxml2 DOM, and a new package dom.el has been added to
490 interact with this DOM. See the Emacs Lisp manual for interface
494 *** `mailcap-mime-data' is now consulted when displaying PDF files.
497 *** The new `S' command will list all eww buffers, and allow managing
501 *** https pages with valid certificates have headers marked in green, while
502 invalid certificates are marked in red.
506 *** text/html messages that contain inline image parts will be
507 transformed into multipart/related messages before sending.
510 *** New UPatterns `quote', `app', `cl-struct', and `eieio'.
511 *** New UPatterns can be defined with `pcase-defmacro'.
513 *** New vector QPattern.
516 *** Strings after `:documentation' are highlighted as docstrings.
519 *** Rectangle Mark mode can have corners past EOL or in the middle of a TAB.
520 *** C-x C-x in rectangle-mark-mode now cycles through the four corners.
521 *** `string-rectangle' provides on-the-fly preview of the result.
523 ** New font-lock functions font-lock-ensure and font-lock-flush, which
524 should be used instead of font-lock-fontify-buffer when called from Elisp.
526 ** Macro `minibuffer-with-setup-hook' takes (:append FUN) to mean
527 appending FUN to `minibuffer-setup-hook'.
530 *** New functions cl-fresh-line, cl-digit-char-p and cl-parse-integer.
534 The seq library adds sequence manipulation functions and macros that
535 complement basic functions provided by subr.el. All functions are
536 prefixed with `seq-' and work on lists, strings and vectors.
540 The map library provides map-manipulation functions that work on alists,
541 hash-table and arrays. All functions are prefixed with "map-".
543 ** Calendar and diary
546 *** The default `diary-file' is now located in .emacs.d.
549 *** New commands to insert diary entries with Chinese dates:
550 `diary-chinese-insert-anniversary-entry' `diary-chinese-insert-entry'
551 `diary-chinese-insert-monthly-entry', `diary-chinese-insert-yearly-entry'.
554 *** The calendar can now list and mark diary entries with Chinese dates.
555 See `diary-chinese-list-entries' and `diary-chinese-mark-entries'.
558 *** The option `calendar-mode-line-format' can now be nil,
559 which means to do nothing special with the mode line in calendars.
562 *** New option `calendar-weekend-days'.
563 The option customizes which day headers receive the
564 `calendar-weekend-header' face.
567 *** New optional args N and STRING for ‘holiday-greek-orthodox-easter’.
570 *** Many items obsolete since at least version 23.1 have been removed.
571 The majority were function/variable/face aliases, too numerous to list here.
574 **** Functions `calendar-one-frame-setup', `calendar-only-one-frame-setup',
575 `calendar-two-frame-setup', `european-calendar', `american-calendar'.
577 **** Hooks `cal-menu-load-hook', `cal-x-load-hook'.
579 **** Macro `calendar-for-loop'.
581 **** Variables `european-calendar-style', `diary-face', `hebrew-holidays-{1,4}'.
583 **** The nil and list forms of `diary-display-function'.
585 ** New ERT function `ert-summarize-tests-batch-and-exit'.
587 ** New js.el option `js-indent-first-init'.
590 ** `Info-fontify-maximum-menu-size' can be t for no limit.
593 ** `info-display-manual' can now be given a prefix argument which (any
594 non-nil value) directs the command to limit the completion
595 alternatives to currently visited manuals.
598 ** ntlm.el has support for NTLM2.
602 *** The Rmail commands d, C-d and u take optional repeat counts to delete or
603 undelete multiple messages.
605 *** Rmail can now render HTML mail messages if your Emacs was built with
606 libxml2 or if you have the Lynx browser installed. By default, Rmail
607 will display the HTML version of a mail message that has both HTML and
608 plain text parts, if display of HTML email is possible; customize the
609 `rmail-mime-prefer-html' option to `nil' if you don't want that.
612 *** In the commands that make summaries by subject, recipients, or senders,
613 you can no longer use commas to separate regular expressions.
615 ** SES now supports local printer functions; see `ses-define-local-printer'.
617 ** In sh-mode, you can now use `sh-shell' as a file-local variable to
618 specify the type of shell in use (bash, csh, etc).
622 *** Fatal TLS errors are now silent by default.
626 *** The URL package accepts now the protocols "ssh", "scp" and "rsync".
627 When `url-handler-mode' is enabled, file operations for these
628 protocols as well as for "telnet" and "ftp" are passed to Tramp.
630 *** The URL package allows customizing the `url-user-agent' string.
631 The new `url-user-agent' variable can be customized to be a string or
634 *** The new interface variable `url-request-noninteractive' can be used
635 to specify that we're running in a noninteractive context, and that
636 we should not be queried about things like TLS certificate validity.
638 *** If URL is used with a https connection, the first callback argument
639 plist will contain a :peer element that has the output of
640 `gnutls-peer-status' (if Emacs is built with GnuTLS support).
644 *** New connection method "nc", which allows to access dumb busyboxes.
646 *** Method-specific parameters can be overwritten now with variable
647 `tramp-connection-properties'.
651 *** New user variable `sql-default-directory' enables remote
652 connections using Tramp.
654 *** New command `sql-send-line-and-next' sends the current line to the
655 interactive buffer and advances to the next line, skipping whitespace
658 *** Add support for Vertica SQL.
660 ** VC and related modes
662 *** Basic push support, via `vc-push', bound to `C-x v P'.
663 Implemented for Bzr, Git, Hg. As part of this change, the pre-existing
664 (undocumented) command vc-hg-push now behaves slightly differently.
666 *** The new command vc-region-history shows the log+diff of the active region.
668 *** New option `vc-annotate-background-mode' controls whether
669 the color range from `vc-annotate-color-map' is applied to the
670 background or to the foreground.
672 *** `compare-windows' now compares text with the most recently used window
673 instead of the next window. The new option `compare-windows-get-window-function'
674 allows to customize this.
676 *** Two new faces `compare-windows-removed' and `compare-windows-added'
677 replace the obsolete face `compare-windows'.
680 *** `log-edit-insert-changelog' converts "(tiny change)" to
681 "Copyright-paperwork-exempt: yes". Set `log-edit-rewrite-tiny-change'
684 ** VHDL mode supports VHDL'08.
686 ** Calculator: decimal display mode uses "," groups, so it's more
687 fitting for use in money calculations; factorial works with
690 ** HideIfDef mode now support full C/C++ expressions, argumented macro expansions,
691 interactive macro evaluation and automatic scanning of #defined symbols.
693 *** New custom variable `hide-ifdef-header-regexp' to define C/C++ header file
694 name patterns. Default case-insensitive .h, .hh, .hpp and .hxx.
695 *** New custom variable `hide-ifdef-expand-reinclusion-protection' to prevent
696 reinclusion protected header files from being fully hidden.
697 *** New custom variable `hide-ifdef-exclude-define-regexp' to define symbol
698 name patterns (e.x. all "FOR_DOXYGEN_ONLY_*") to be excluded.
702 *** New custom variable `tex-print-file-extension' to help users who
703 use PDF instead of DVI.
705 *** TeX mode now supports Prettify Symbols mode. When enabling
706 `prettify-symbols-mode' in a tex-mode buffer, \alpha ... \omega, and
707 many other math macros are displayed using unicode characters.
709 ** whitespace-mode: new 'big-indent style highlighting too much indentation.
710 By default, 32 spaces and four TABs are considered to be too much but
711 `whitespace-big-indent-regexp' can be configured to change that.
713 ** tildify: `tildify-space-string', `tildify-pattern', and
714 `tildify-foreach-region-function' variables added making
715 `tildify-string-alist', `tildify-pattern-alist', and
716 `tildify-ignored-environments-alist' variables (as well as a few
717 helper functions) obsolete.
720 The new package provides generic framework and new commands to find
721 and move to definitions, as well as pop back to the original location.
724 `xref-find-definitions' replaces `find-tag' and provides an interface
725 to pick one destination among several. Hence, `tags-loop-continue' is
726 unbound. `xref-pop-marker-stack' replaces `pop-tag-mark', but uses an
727 easier binding, which is now unoccupied (`M-,').
728 `xref-find-definitions-other-window' replaces `find-tag-other-window'.
729 `xref-find-definitions-other-frame' replaces `find-tag-other-frame'.
730 `xref-find-apropos' replaces `find-tag-regexp'.
733 `find-tag-marker-ring-length' is now an obsolete alias for
734 `xref-marker-ring-length'. `find-tag-marker-ring' is now an obsolete
735 alias for a private variable. `xref-push-marker-stack' and
736 `xref-pop-marker-stack' should be used to mutate it instead.
739 As a result of the above, these commands are now obsolete:
740 `find-tag-other-window', `find-tag-other-frame', `find-tag-regexp',
741 `tags-apropos' and `tags-loop-continue'.
744 EUDC's LDAP backend has been improved.
746 *** EUDC supports LDAP-over-SSL URLs (ldaps://).
748 *** EUDC passes LDAP passwords through a pipe to the ldapsearch
749 subprocess instead of on the command line.
751 *** EUDC handles LDAP wildcards automatically so the user shouldn't
752 need to configure this manually anymore.
754 *** The LDAP configuration section of EUDC's manual has been
757 There have also been customization changes.
759 *** New custom variable `eudc-server-hotlist' to allow specifying
760 multiple EUDC servers in init file.
762 *** Custom variable `eudc-inline-query-format' defaults to completing
763 on email and firstname instead of surname.
765 *** Custom variable `eudc-expansion-overwrites-query' defaults to nil
766 to avoid interfering with the kill ring.
768 *** Custom variable `eudc-inline-expansion-format' defaults to
769 "Firstname Surname <mail-address>".
771 *** Custom variable `eudc-options-file' defaults to
772 "~/.emacs.d/eudc-options".
774 *** New custom variable `ldap-ldapsearch-password-prompt-regexp' to
775 allow overriding the regular expression that recognizes the ldapsearch
776 command line's password prompt.
781 *** The new built-in command `clear' can scroll window contents out of sight.
782 If provided with an optional non-nil argument, the scrollback contents will be cleared.
784 *** New buffer syntax '#<buffer-name>', which is equivalent to
785 '#<buffer buffer-name>'. This shorthand makes interacting with
786 buffers from eshell more convenient. Custom variable
787 `eshell-buffer-shorthand', which has been broken for a while, has been
790 *** By default, eshell "visual" program buffers (created by
791 `eshell-visual-commands' and similar custom vars) are no longer killed
792 when their processes die. This fixes issues with short-lived commands
793 and makes visual programs more useful in general. For example, if
794 "git log" is a visual command, it will always show the visual command
795 buffer, even if the "git log" process dies. For the old behavior,
796 make the new option `eshell-destroy-buffer-when-process-dies' non-nil.
800 *** Support for the Conkeror web browser.
803 *** Support for several ancient browsers is now officially obsolete.
806 ** tar-mode: new `tar-new-entry' command, allowing for new members to
807 be added to the archive.
809 ** Autorevert: dired buffers are also auto-reverted via file
810 notifications, if Emacs is compiled with file notification support.
817 *** landmark.el (moved to elpa.gnu.org)
820 ** The character classes [:graph:] and [:print:] in regular expressions
821 no longer match every multibyte character. Instead, Emacs now
822 consults the Unicode character properties to determine which
823 characters are graphic or printable. In particular, surrogates and
824 unassigned codepoints are now rejected. If you want the old behavior,
825 use [:multibyte:] instead.
828 * New Modes and Packages in Emacs 25.1
830 ** pinentry.el allows GnuPG passphrase to be prompted through the
831 minibuffer instead of a graphical dialog, depending on whether the gpg
832 command is called from Emacs (i.e., INSIDE_EMACS environment variable
833 is set). This feature requires newer versions of GnuPG (2.1.5 or
834 later) and Pinentry (0.9.5 or later).
836 ** cl-generic.el provides CLOS-style multiple-dispatch generic functions.
838 ** scss-mode (a minor variant of css-mode)
840 ** let-alist is a new macro (and a package) that allows one to easily
841 let-bind the values stored in an alist.
843 ** `tildify-mode' allows to automatically insert hard spaces as one
844 types the text. Breaking line after a single-character words is
845 forbidden by Czech and Polish typography (and may be discouraged in
846 other languages), so `auto-tildify-mode' makes it easier to create
847 a typographically-correct documents.
849 * Incompatible Lisp Changes in Emacs 25.1
851 ** `:global' minor mode use `setq-default' rather than `setq'.
852 This means that you can't use `make-local-variable' and expect them to
853 "magically" become buffer-local.
855 ** `inhibit-point-motion-hooks' now defaults to t and is obsolete.
858 ** `track-mouse' no longer freezes the shape of the mouse pointer.
859 The `track-mouse' form no longer refrains from changing the shape of
860 the mouse pointer for the entire time the body of that form is
861 executed. Lisp programs that use `track-mouse' for dragging across
862 large portions of the Emacs display, and want to avoid changes in the
863 pointer shape during dragging, should bind the variable `track-mouse'
864 to the special value `dragging' in the body of the form.
866 ** The optional `predicate' argument of `lisp-complete-symbol' no longer
867 has any effect. (This change was made in Emacs 24.4 but was not
868 advertised at the time.)
870 ** `indirect-function' does not signal `void-function' any more.
871 This is mostly a bug-fix, since this change was missed back in 24.4 when
872 symbol-function was changed not to signal `void-function' any more.
873 *** As a consequence, the second arg of `indirect-function' is now obsolete.
875 ** Comint, term, and compile do not set the EMACS env var any more.
876 Use the INSIDE_EMACS environment variable instead.
878 ** `save-excursion' does not save&restore the mark any more.
880 ** read-buffer-function can now be called with a 4th argument (`predicate').
882 ** completion-table-dynamic stays in the minibuffer.
883 If you want the old behavior of calling the function in the buffer
884 from which the minibuffer was entered, call it with the new argument
887 ** window-configurations no longer record the buffers' marks.
889 ** inhibit-modification-hooks now also inhibits lock-file checks, as well as
890 active region handling.
892 ** deactivate-mark is now buffer-local.
894 ** `cl-the' now asserts that its argument is of the given type.
896 ** `process-running-child-p` may now return a numeric process
897 group ID instead of `t'.
900 ** Mouse click events on mode line or header line no longer include
901 any reference to a buffer position. The 6th member of the mouse
902 position list returned for such events is now nil.
904 ** Menu items in keymaps do not support the "key shortcut cache" any more.
905 These slots used to hold key-shortcut data, but have been obsolete since
908 ** Emacs no longer downcases the first letter of a system diagnostic
909 when signaling a file error. For example, it now reports "Permission
910 denied" instead of "permission denied". The old behavior was problematic
911 in languages like German where downcasing rules depend on grammar.
914 ** New variable ‘text-quoting-style’ to control how Emacs translates quotes.
915 Set it to ‘curve’ for curved single quotes ‘like this’, to ‘straight’
916 for straight apostrophes 'like this', and to ‘grave’ for grave accent
917 and apostrophe `like this'. The default value nil acts like ‘curve’
918 if curved single quotes are displayable, and like ‘grave’ otherwise.
919 Quotes in info files are not translated.
922 ** substitute-command-keys now replaces quotes.
923 That is, it converts documentation strings’ quoting style as per the
924 value of ‘text-quoting-style’. Doc strings in source code can use
925 either curved quotes or grave accent and apostrophe. As before,
926 characters preceded by \= are output as-is.
929 ** Message-issuing functions ‘error’, ‘message’, etc. now convert quotes.
930 They use the new ‘format-message’ function instead of plain ‘format’,
931 so that they now follow user preference as per ‘text-quoting-style’ if
932 their format argument contains curved quotes.
935 ** The character classes [:alpha:] and [:alnum:] in regular expressions
936 now match multibyte characters using Unicode character properties.
937 If you want the old behavior where they matched any character with
938 word syntax, use `\sw' instead.
941 ** The `diff' command uses the unified format now. To restore the old
942 behavior, set `diff-switches' to `-c'.
944 ** `grep-template' and `grep-find-template' values don't include the
945 --color argument anymore. It's added at the <C> place holder position
948 ** `grep-template' and `grep-find-template' values don't include the
949 --color argument anymore. It's added at the <C> place holder position
950 dynamically. Any third-party code that changes these templates should
951 be updated accordingly.
954 * Lisp Changes in Emacs 25.1
956 ** New functions `filepos-to-bufferpos' and `bufferpos-to-filepos'.
958 ** The default value of `load-read-function' is now `read'.
960 ** New hook `pre-redisplay-functions', a bit easier to use than pre-redisplay-function.
962 ** The second arg of `looking-back' should always be provided explicitly.
964 ** Obsolete text properties `intangible', `point-entered', and `point-left'.
965 Replaced by properties `cursor-intangible' and `cursor-sensor-functions',
966 implemented by the new `cursor-intangible-mode' and
967 `cursor-sensor-mode' minor modes.
969 ** New process type `pipe', which can be used in combination with the
970 `:stderr' keyword of make-process to handle standard error output
973 ** New function `make-process' provides an alternative interface to
974 `start-process'. It allows programs to set process parameters such as
975 process filter, sentinel, etc., through keyword arguments (similar to
976 `make-network-process').
978 ** `read-buffer' takes a new `predicate' argument.
980 ** Emacs Lisp now supports generators.
982 ** New finalizer facility for running code when objects
985 ** lexical closures can use (:documentation <form>) to build their docstring.
986 It should be placed right where the docstring would be, and <form> is then
987 evaluated (and should return a string) when the closure is built.
989 ** define-inline provides a new way to define inlinable functions.
991 ** New function `macroexpand-1' to perform a single step of macroexpansion.
993 ** Some "x-*" were obsoleted:
994 *** x-select-text is renamed gui-select-text.
995 *** x-selection-value is renamed gui-selection-value.
996 *** x-get-selection is renamed gui-get-selection.
997 *** x-get-clipboard and x-clipboard-yank are marked obsolete.
998 *** x-get-selection-value is renamed to gui-get-primary-selection.
999 *** x-set-selection is renamed to gui-set-selection
1001 ** New function `string-greaterp', which return the opposite result of
1004 ** New function `alist-get', which is also a valid place (aka lvalue).
1006 ** New function `funcall-interactively', which works like `funcall'
1007 but makes `called-interactively-p' treat the function as (you guessed it)
1008 called interactively.
1010 ** New function `function-put' to use instead of `put' for function properties.
1013 ** New properties that can be specified with `declare':
1014 *** (interactive-only INSTEAD), says to use INSTEAD for non-interactive use.
1015 *** (pure VAL), if VAL is non-nil, indicates the function is pure.
1016 *** (side-effect-free VAL), if VAL is non-nil, indicates the function does not
1020 ** New macro `with-file-modes', for evaluating expressions with default file
1021 permissions set to temporary values (e.g., for creating private files).
1023 ** You can access the slots of structures using `cl-struct-slot-value'.
1025 ** Function `sort' can deal with vectors.
1027 ** Function `system-name' now returns an updated value if the current
1028 system's name has changed or if the Emacs process has changed systems,
1029 and to avoid long waits it no longer consults DNS to canonicalize the
1030 name. The variable `system-name' is now obsolete.
1033 ** Function `write-region' no longer outputs "Wrote FILE" in batch mode.
1035 ** If `pwd' is called with a prefix argument, insert the current default
1039 ** New utilities in subr-x.el:
1040 *** New macros `if-let' and `when-let' allow defining bindings and to
1041 execute code depending whether all values are true.
1042 *** New macros `thread-first' and `thread-last' allow threading a form
1043 as the first or last argument of subsequent forms.
1046 ** Documentation strings now support quoting with curved single quotes
1047 ‘like-this’ in addition to the old style with grave accent and
1048 apostrophe `like-this'. The new style looks better on today's displays.
1049 In the new Electric Quote mode, you can enter curved single quotes
1050 into documentation by typing ` and '. Outside Electric Quote mode,
1051 you can enter them by typing ‘C-x 8 [’ and ‘C-x 8 ]’, or (if your Alt
1052 key works) by typing ‘A-[’ and ‘A-]’. As described above under
1053 ‘text-quoting-style’, the user can specify how to display doc string
1057 ** New function ‘format-message’ is like ‘format’ and also converts
1058 curved quotes as per ‘text-quoting-style’.
1061 ** New ‘format’ flag ‘q’
1062 The new ‘q’ flag causes ‘format’ to quote the output representation as
1063 per the value of ‘text-quoting-style’. E.g., (format "%qs failed"
1064 "foo") might return "‘foo’ failed".
1067 ** show-help-function's arg is converted via substitute-command-keys
1068 before being passed to the function. Help strings, help-echo
1069 properties, etc. can therefore contain command key escapes and
1073 ** Time-related changes:
1075 *** Time conversion functions now accept an optional ZONE argument
1076 that specifies the time zone rules for conversion. ZONE is omitted or
1077 nil for Emacs local time, t for Universal Time, ‘wall’ for system wall
1078 clock time, or a string as in ‘set-time-zone-rule’ for a time zone
1079 rule. The affected functions are ‘current-time-string’,
1080 ‘current-time-zone’, ‘decode-time’, and ‘format-time-string’. The
1081 function ‘encode-time’, which already accepted a simple time zone rule
1082 argument, has been extended to accept all the new forms.
1084 *** Time-related functions now consistently accept numbers
1085 (representing seconds since the epoch) and nil (representing the
1086 current time) as well as the usual list-of-integer representation.
1087 Affected functions include `current-time-string', `current-time-zone',
1088 `decode-time', `float-time', `format-time-string', `seconds-to-time',
1089 `time-add', `time-less-p', `time-subtract', `time-to-day-in-year',
1090 `time-to-days', and `time-to-seconds'.
1092 *** The `encode-time-value' and `with-decoded-time-value' macros have
1095 *** `calendar-next-time-zone-transition', `time-add', and
1096 `time-subtract' no longer return time values in the obsolete and
1097 undocumented integer-pair format. Instead, they return a list of two
1101 ** New function `set-binary-mode' allows to switch a standard stream
1102 of the Emacs process to binary I/O mode.
1104 ** In locales that cannot display curved quotes, ASCII approximations
1105 are installed in standard-display-table.
1107 ** Standard output and error streams now transliterate characters via
1108 standard-display-table, and encode output using locale-coding-system.
1110 ** Miscellaneous name change
1112 For consistency with the usual Emacs spelling, the Lisp variable
1113 `hfy-optimisations' has been renamed to `hfy-optimizations'.
1114 The old name should still work, as an obsolescent alias.
1117 * Changes in Frames and Windows Code in Emacs 25.1
1120 ** Emacs can now draw horizontal scroll bars on some platforms that
1121 provide toolkit scroll bars, namely Gtk+, Lucid, Motif and Windows.
1122 Horizontal scroll bars are turned off by default.
1123 *** New function `horizontal-scroll-bars-available-p' telling whether
1124 horizontal scroll bars are available on the underlying system.
1125 *** New mode `horizontal-scroll-bar-mode' to toggle horizontal scroll
1126 bars on all existing and future frames.
1127 *** New function `toggle-horizontal-scroll-bar' to toggle horizontal
1128 scroll bars on the selected frame.
1129 *** New frame parameters `horizontal-scroll-bars' and
1130 `scroll-bar-height' to set horizontal scroll bars and their height
1131 for individual frames and in `default-frame-alist'.
1132 *** New functions `frame-scroll-bar-height' and
1133 `window-scroll-bar-height' return the height of horizontal scroll
1134 bars on a specific frame or window.
1135 *** `set-window-scroll-bars' now accepts five parameters where the last
1136 two specify height and type of the window's horizontal scroll bar.
1137 *** `window-scroll-bars' now returns type and sizes of horizontal scroll
1139 *** New buffer-local variables `horizontal-scroll-bar' and
1140 `scroll-bar-height'.
1143 ** New functions `frame-geometry' and `frame-edges' give access to a
1147 ** New functions `mouse-absolute-pixel-position' and
1148 `set-mouse-absolute-pixel-position' get/set screen coordinates of the
1152 ** The function `window-edges' now accepts three additional arguments to
1153 retrieve body, absolute and pixel edges of the window.
1156 ** The functions `window-inside-edges', `window-inside-pixel-edges' and
1157 `window-inside-absolute-pixel-edges' have been renamed to respectively
1158 `window-body-edges', `window-body-pixel-edges' and
1159 `window-absolute-body-pixel-edges'. The old names are kept as aliases.
1162 ** New function `window-absolute-pixel-position' to get the screen
1163 coordinates of a visible buffer position.
1166 ** The height of a frame's menu and tool bar are no longer counted in the
1167 frame's text height. This means that the text height stands only for
1168 the height of the frame's root window plus that of the echo area (if
1169 present). This was already the behavior for frames with external tool
1170 and menu bars (like in the Gtk builds) but has now been extended to all
1174 ** Frames now do not necessarily preserve the number of columns or lines
1175 they display when setting default font, menu bar, fringe width, or
1176 scroll bars. In particular, maximized and fullscreen frames are
1177 conceptually never resized if such settings change. For fullheight and
1178 fullwidth frames, the behavior may depend on the toolkit used.
1179 *** New option `frame-inhibit-implied-resize' if non-nil, means that
1180 setting default font, menu bar, fringe width, or scroll bars of a
1181 specific frame does not resize that frame in order to preserve the
1182 number of columns or lines it displays.
1185 ** New function `window-preserve-size' allows to preserve the size of
1186 windows without "fixing" it. It's supported by `fit-window-to-buffer',
1187 `temp-buffer-resize-mode' and `display-buffer'.
1190 ** New minor mode `window-divider-mode' and options
1191 `window-divider-default-places', `window-divider-default-bottom-width'
1192 and `window-divider-default-right-width'.
1195 ** New option `switch-to-buffer-in-dedicated-window' allows to customize
1196 how `switch-to-buffer' proceeds interactively when the selected window
1197 is strongly dedicated to its buffer.
1200 ** The option `even-window-heights' has been renamed to
1201 `even-window-sizes' and now handles window widths as well.
1203 ** Tearoff menus and detachable toolbars for Gtk+ has been removed.
1204 Those features have been deprecated in Gtk+ for a long time.
1208 *** etags no longer qualifies class members by default.
1209 By default, `etags' will not qualify class members for C-like
1210 object-oriented languages with their class names and namespaces, and
1211 will remove qualifications used explicitly in the code from the tag
1212 names it puts in TAGS files. This is so the etags.el back-end for
1213 `xref-find-definitions' is more accurate and produces less false
1216 Use --class-qualify (-Q) if you want the old default behavior of
1217 qualifying class members in C++, Java, and Objective C. Note that
1218 using -Q might make some class members become "unknown" to `M-.'
1219 (`xref-find-definitions'); if so, you can use `C-u M-.' to specify the
1220 qualified names by hand.
1223 * Changes in Emacs 25.1 on Non-Free Operating Systems
1226 ** MS-Windows specific Emacs build scripts are no longer in the distribution
1227 This includes the makefile.w32-in files in various subdirectories, and
1228 the support files. The file nt/configure.bat now just tells the user
1229 to use the procedure described in nt/INSTALL, by running the Posix
1230 `configure' script in the top-level directory.
1233 ** Building Emacs for MS-Windows requires at least Windows XP
1234 or Windows Server 2003. The built binaries still run on all versions
1235 of Windows starting with Windows 9X.
1238 ** Emacs running on MS-Windows now supports the daemon mode.
1240 ** The byte counts in etags-generated TAGS files are now the same on
1241 MS-Windows as they are on other platforms.
1244 ** On OS X, configure creates a Cocoa ("Nextstep") build by default.
1245 Pass '--without-ns' to configure to create an X11 build, the old default.
1247 ** OS X 10.5 or older is no longer supported.
1249 ** OS X on PowerPC is no longer supported.
1252 ** The new function 'w32-application-type' returns the type of an
1253 MS-Windows application given the name of its executable program file.
1256 ----------------------------------------------------------------------
1257 This file is part of GNU Emacs.
1259 GNU Emacs is free software: you can redistribute it and/or modify
1260 it under the terms of the GNU General Public License as published by
1261 the Free Software Foundation, either version 3 of the License, or
1262 (at your option) any later version.
1264 GNU Emacs is distributed in the hope that it will be useful,
1265 but WITHOUT ANY WARRANTY; without even the implied warranty of
1266 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1267 GNU General Public License for more details.
1269 You should have received a copy of the GNU General Public License
1270 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
1276 paragraph-separate: "[
\f]*$"