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 file HISTORY for a list of GNU Emacs versions and release dates.
12 See files NEWS.24, NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
13 and NEWS.1-17 for changes in older Emacs versions.
15 You can narrow news to a specific version by calling `view-emacs-news'
16 with a prefix argument or by typing C-u C-h C-n.
19 +++ indicates that all necessary documentation updates are complete.
20 (This means all relevant manuals in doc/ AND lisp doc-strings.)
21 --- means no change in the manuals is needed.
22 When you add a new item, use the appropriate mark if you are sure it applies,
23 otherwise leave it unmarked.
26 * Installation Changes in Emacs 25.1
29 ** Building Emacs now requires C99 or later.
31 ** Building Emacs now requires GNU make, version 3.81 or later.
33 ** New configure option --with-cairo.
34 Maybe add text based on http://lists.gnu.org/archive/html/emacs-devel/2015-05/msg00689.html
36 ** By default, Emacs no longer works on IRIX. We expect that Emacs
37 users are not affected by this, as SGI stopped supporting IRIX in
38 December 2013. If you are affected, please send a bug report. You
39 should be able to work around the problem either by porting the Emacs
40 undumping code to GCC under IRIX, or by configuring --with-wide-int,
41 or by sticking with Emacs 24.4.
43 ** The Emacs garbage collector assumes GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS.
44 The GC_MAKE_GCPROS_NOOPS stack-marking variant has been the default
45 since Emacs 24.4, and the other variants were undocumented and were
46 obstacles to maintenance and development. GC_MARK_STACK and its
47 related symbols have been removed from the C internals.
49 ** 'configure' now prefers gnustep-config when configuring GNUstep.
50 If gnustep-config is not available, the old heuristics are used.
53 ** 'configure' now prefers inotify to gfile for file notification,
54 unless gfile is explicitly requested via --with-file-notification='gfile'.
57 ** The configure option '--with-pkg-config-prog' has been removed.
58 Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to.
61 ** The configure option '--with-mmdf' has been removed.
62 It was no longer useful, as it relied on libraries that are no longer
63 supported, and its presence led to confusion during configuration.
64 This affects only the 'movemail' utility; Emacs itself can still
65 process MMDF-format files as before.
67 ** The configure option '--enable-silent-rules' is now the default,
68 and silent rules are now quieter. To get the old behavior where
69 'make' chatters a lot, configure with '--disable-silent-rules' or
70 build with 'make V=1'.
73 ** The configure option '--with-gameuser' now allows to specify a
74 group instead of a user if its argument is prefixed by ':' (a colon).
75 This will cause the game score files in ${localstatedir}/games/emacs
76 to be owned by that group, and the helper program for updating them to
77 be installed setgid. The option now defaults to the 'games' group.
80 ** The `grep-changelog' script (and its manual page) are no longer included.
81 It has no particular connection to Emacs and has not changed in years,
82 so if you want to use it, you can always take a copy from an older Emacs.
85 * Startup Changes in Emacs 25.1
88 ** When Emacs is given a file as a command line argument and
89 `initial-buffer-choice' is non-nil, display both the file and
90 `initial-buffer-choice'. When Emacs is given more than one file and
91 `initial-buffer-choice' is non-nil, show `initial-buffer-choice'
92 and *Buffer List*. This makes Emacs convenient to use from the
93 command line when `initial-buffer-choice' is non-nil.
96 ** The value of ‘initial-scratch-message’ is now treated as a doc string
97 and can contain escape sequences for command keys, quotes, and the like.
100 * Changes in Emacs 25.1
102 ** `xref-find-definitions' and `describe-function' now display
103 information about mode local overrides (defined by
104 cedet/mode-local.el `define-overloadable-function' and
105 `define-mode-local-overrides').
107 ** New `display-buffer' action function `display-buffer-use-some-frame'
108 This displays the buffer in an existing frame other than the current
109 frame, and allows the caller to specify a frame predicate to exclude
112 ** New doc command `describe-symbol'. Works for functions, vars, faces, etc...
114 ** `isearch' and `query-replace' now perform character folding in matches.
115 This is analogous to case-folding, but applies between Unicode
116 characters and their ASCII counterparts. This means many characters
117 will match entire groups of characters.
119 For instance, the " will match all variants of unicode double quotes
120 (like “ and ”), and the letter a will match all of its accented
121 cousins, even those composed of multiple characters, as well as many
122 other symbols like ℀, ℁, ⒜, and ⓐ.
124 ** New function `character-fold-to-regexp' can be used
125 by searching commands to produce a regexp matching anything that
126 character-folds into STRING.
128 ** New command `checkdoc-package-keywords' checks if the
129 current package keywords are recognized. Set the new option
130 `checkdoc-package-keywords-flag' to non-nil to make
131 `checkdoc-current-buffer' call this function automatically.
133 ** New function `checkdoc-file' checks for style errors.
134 It's meant for use together with `compile':
135 emacs -batch --eval "(checkdoc-file \"subr.el\")"
137 ** New command `comment-line' bound to `C-x C-;'.
139 ** New function `custom-prompt-customize-unsaved-options' checks for
140 unsaved customizations and prompts user to customize (if found).
143 ** Network security (TLS/SSL certificate validity and the like) is
144 added via the new Network Security Manager (NSM) and controlled via
145 the `network-security-level' variable.
147 ** C-h l now also lists the commands that were run.
150 ** The new M-s M-w key binding uses eww to search the web for the
153 ** M-x suggests shorthands and ignores obsolete commands for completion.
154 ** x-select-enable-clipboard is renamed select-enable-clipboard.
155 x-select-enable-primary and renamed select-enable-primary.
156 Additionally they both now apply to all systems (OSX, GNUstep, Windows, you
157 name it), with the proviso that on some systems (e.g. Windows)
158 select-enable-primary is ineffective since the system doesn't
159 have the equivalent of a primary selection.
162 ** terpri gets an optional arg ENSURE to conditionally output a newline.
165 ** New macro `define-advice'.
167 ** `insert-register' now leaves point after the inserted text
168 when called interactively. A prefix argument toggles this behavior.
170 ** New var `truncate-string-ellipsis' to choose how to indicate truncation.
173 ** The new variable `term-file-aliases' replaces some files from lisp/term.
174 The function `tty-run-terminal-initialization' consults this variable
175 when deciding what terminal-specific initialization code to run.
178 ** New variable `system-configuration-features', listing some of the
179 main features that Emacs was compiled with. This is mainly intended
180 for use in Emacs bug reports.
183 ** A password is now hidden also when typed in batch mode. Another
184 hiding character but the default `.' can be used by let-binding the
185 variable `read-hide-char'.
187 ** The new functions `string-collate-lessp' and `string-collate-equalp'
188 preserve the collation order as defined by the system's locale(1)
189 environment. For the time being this is implemented for modern POSIX
190 systems and for MS-Windows, for other systems they fall back to their
191 counterparts `string-lessp' and `string-equal'.
193 *** The ls-lisp package uses `string-collate-lessp' to sort file names.
194 If you want the old, locale-independent sorting, customize the new
195 option `ls-lisp-use-string-collate' to a nil value.
197 *** The MS-Windows specific variable `w32-collate-ignore-punctuation',
198 if set to a non-nil value, causes the above 2 functions to ignore
199 symbol and punctuation characters when collating strings. This
200 emulates the behavior of modern Posix platforms when the locale's
201 codeset is "UTF-8" (as in "en_US.UTF-8"). This is needed because
202 MS-Windows doesn't support UTF-8 as codeset in its locales.
205 ** The new function `bidi-find-overridden-directionality' allows to
206 find characters whose directionality was, perhaps maliciously,
207 overridden by directional override control characters. Lisp programs
208 can use this to detect potential phishing of URLs and other links that
209 exploits bidirectional display reordering.
212 ** The new function `buffer-substring-with-bidi-context' allows to
213 copy a portion of a buffer into a different location while preserving
214 the visual appearance both of the copied text and the text at
215 destination, even when the copied text includes mixed bidirectional
216 text and directional control characters.
218 ** New variable `ns-use-fullscreen-animation' controls animation for
219 non-native NS fullscreen. The default is nil. Set to t to enable
220 animation when entering and leaving fullscreen. For native OSX fullscreen
223 ** A new text property `inhibit-read-only' can be used in read-only
224 buffers to allow certain parts of the text to be writable.
226 ** A new function `directory-files-recursively' returns all matching
227 files (recursively) under a directory.
229 ** The new function `directory-name-p' can be used to check whether a file
230 name (as returned from, for instance, `file-name-all-completions' is
231 a directory file name. It returns non-nil if the last character in
232 the name is a forward slash.
235 ** New variable `fast-but-imprecise-scrolling' inhibits
236 fontification during full screen scrolling operations, giving less
237 hesitant operation during auto-repeat of C-v, M-v at the cost of
238 possible inaccuracies in the end position.
240 ** The function `font-info' now returns more details about a font.
241 In particular, it now returns the average width of the font's
242 characters, which can be used for geometry-related calculations.
244 ** A new function `default-font-width' returns the average width of a
245 character in the current buffer's default font. If the default face
246 is remapped (see `face-remapping-alist'), the value for the remapped
247 face is returned. This function complements the existing function
248 `default-font-height'.
250 ** New functions `window-font-height' and `window-font-width' return
251 the height and average width of characters in a specified face and
252 window. If FACE is remapped (see `face-remapping-alist'), the
253 function returns the information for the remapped face.
255 ** A new function `window-max-chars-per-line' returns the maximal
256 number of characters that can be displayed on one line. If a face
257 and/or window are provided, these values are used for the
258 calculation. This function is different from `window-body-width' in
259 that it accounts for (i) continuation glyphs, (ii) the size of the
260 font, and (iii) the specified window.
262 ** New possible value for `system-type': nacl.
265 ** New variable `inhibit-message', when bound to non-nil, inhibits
266 `message' and related functions from displaying messages the Echo
267 Area. The output is still logged to the *Messages* buffer.
270 ** It is now safe for a mode that derives `tabulated-list-mode' to not
271 call `tabulated-list-init-header', in which case it will have no
275 ** `tabulated-list-print' takes a second optional argument, update,
276 which specifies an alternative printing method which is faster when
277 few or no entries have changed.
280 * Editing Changes in Emacs 25.1
282 ** Successive single-char deletions are collapsed in the undo-log just like
283 successive char insertions.
285 ** Unicode names entered via C-x 8 RET now use substring completion by default.
287 ** C-x 8 now has shorthands for these chars: ‐ ‑ ‒ – — ― ‘ ’ “ ” † ‡ • ′ ″
288 € № ← → ↔ − ≈ ≠ ≤ ≥. As before, you can type C-x 8 C-h to list shorthands.
290 ** New minor mode electric-quote-mode for quoting ‘like this’ and “like this”
291 as you type. See also the new variable ‘text-quoting-style’.
293 ** New minor mode global-eldoc-mode is enabled by default.
295 ** Emacs now supports "bracketed paste mode" when running on a terminal
296 that supports it. This facility allows Emacs to understand pasted
297 chunks of text as strings to be inserted, instead of interpreting each
298 character in the pasted text as actual user input. This results in a
299 paste experience similar to that under a window system, and significant
300 performance improvements when pasting large amounts of text.
302 ** Emacs now supports the latest version of the UBA.
303 The Emacs implementation of the Unicode Bidirectional Algorithm (UBA)
304 was updated to support all the latest additions and changes introduced
305 in Unicode Standard versions 6.3, 7.0, and the latest Unicode 8.0.
306 This includes full support for directional isolates and the
307 Bidirectional Parentheses Algorithm (BPA) specified by these Unicode
310 ** You can access `mouse-buffer-menu' (C-down-mouse-1) using C-f10.
313 ** New buffer-local `electric-pair-local-mode'.
316 * Changes in Specialized Modes and Packages in Emacs 25.1
320 *** `json-pretty-print' and `json-pretty-print-buffer' now maintain
321 the ordering of object keys by default.
323 ** You can recompute the VC state of a file buffer with `M-x vc-refresh-state'
324 ** Prog mode has some support for multi-mode indentation.
325 See `prog-indentation-context' and `prog-widen'.
327 ** Prettify Symbols mode
328 *** Prettify Symbols mode supports custom composition predicates. By
329 overriding the default `prettify-symbols-compose-predicate', modes can
330 specify in which contexts a symbol map be composed to some unicode
331 character. `prettify-symbols-default-compose-p' is the default which
332 is suitable for most programming languages such as C or Lisp (but not
335 *** Symbols can be unprettified while point is inside them.
336 New variable `prettify-symbols-unprettify-at-point' configures this.
338 ** New `xterm-screen-extra-capabilities' config.
340 ** The `save-place' variable is replaced by a `save-place-mode'.
344 *** Hide message types by network or channel. `erc-hide-list' will
345 hide all messages of the specified type, where `erc-network-hide-list'
346 and `erc-channel-hide-list' will only hide the specified message types
347 for the respective specified targets.
350 *** `midnight-mode' is a proper minor mode.
351 *** clean-buffer-*-regexps can now specify buffers via predicate functions.
353 ** In xterms, killing text now also sets the CLIPBOARD/PRIMARY selection
354 in the surrounding GUI (using the OSC-52 escape sequence). This only works
355 if your xterm supports it and enables the `allowWindowOps' options (disabled
356 by default at least in Debian, for security reasons).
358 Similarly, you can yank the CLIPBOARD/PRIMARY selection (using the OSC-52
359 escape sequence) if your xterm has the feature enabled but for that you
360 additionally need to add `getSelection' to `xterm-extra-capabilities'.
362 ** xterm-mouse-mode now supports mouse-tracking (if your xterm supports it).
366 *** New "external" package status.
367 An external package is any installed package that's not built-in and
368 not from `package-user-dir', which usually means it's from an entry in
369 `package-directory-list'. They are treated much like built-in
370 packages, in that they cannot be deleted through the package menu and
371 are not considered for upgrades.
373 The effect, is that a user can manually place a specific version of a
374 package inside `package-directory-list' and the package menu will
377 *** If a package is available on multiple archives and one has higher
378 priority (as per `package-archive-priorities') only that one is
379 listed. This can be configured with `package-menu-hide-low-priority'.
381 *** `package-menu-toggle-hiding' now toggles the hiding of packages.
382 This includes the above-mentioned low-priority packages, as well as
383 available packages whose version is lower than the currently installed
384 version (which were previously impossible to display).
385 This allows users to downgrade a package if a lower version is
388 *** When filtering the package menu, keywords starting with "arc:" or
389 "status:" represent package archive or status, respectively, instead
392 *** Most functions which involve downloading information now take an
393 ASYNC argument. If it is non-nil, package.el performs the download(s)
396 *** New variable `package-menu-async' controls whether the
397 package-menu uses asynchronous downloads.
399 *** `package-install-from-buffer' and `package-install-file' work on directories.
400 This follows the same rules as installing from a .tar file, except the
401 -pkg file is optional.
403 *** Packages which are dependencies of other packages cannot be deleted.
404 The FORCE argument to `package-delete' overrides this.
406 *** New custom variable `package-selected-packages' tracks packages
407 which were installed by the user (as opposed to installed as
408 dependencies). This variable can also be manually customized.
410 *** New command `package-install-user-selected-packages' installs all
411 packages from `package-selected-packages' which are currently missing.
413 *** New command `package-autoremove' removes all packages which were
414 installed strictly as dependencies but are no longer needed.
418 When you invoke `shell' interactively, the *shell* buffer will now
419 display in a new window. However, you can customize this behavior via
420 the `display-buffer-alist' variable. For example, to get
421 the old behavior -- *shell* buffer displays in current window -- use
422 (add-to-list 'display-buffer-alist
423 '("^\\*shell\\*$" . (display-buffer-same-window))).
427 *** The `:protection' slot option is not obeyed any more.
429 *** The `newname' argument to constructors is optional&deprecated.
430 If you need your objects to be named, do it by inheriting from `eieio-named'.
432 *** The <class>-list-p and <class>-child-p functions are declared obsolete.
434 *** The <class> variables are declared obsolete.
436 *** The <initarg> variables are declared obsolete.
437 *** defgeneric and defmethod are declared obsolete.
439 *** `constructor' is now an obsolete alias for `make-instance'.
442 *** New command `ido-bury-buffer-at-head' bound to C-S-b
443 Bury the buffer at the head of `ido-matches', analogous to how C-k
444 kills the buffer at head.
445 *** A prefix argument to `ido-restrict-to-matches' will reverse its
446 meaning, and the list is restricted to those elements that do not
447 match the current input.
451 *** You can use <up> and <down> keys to move point in the multi-line
452 minibuffer just as in an ordinary buffer. Only when point moves over
453 the bottom/top of the minibuffer it goes to the next/previous history
454 element. The new commands bound to <up> and <down> in the minibuffer:
455 `next-line-or-history-element' and `previous-line-or-history-element'.
457 ** Search and Replace
459 *** Query-replace history is enhanced.
460 When query-replace reads the FROM string from the minibuffer, typing
461 `M-p' will now show previous replacements as "FROM SEP TO", where FROM
462 and TO are the original text and its replacement, and SEP is an arrow
463 string defined by the new variable `query-replace-from-to-separator'.
464 To select a prior replacement, type `M-p' until the desired
465 replacement appears in the minibuffer, and then exit the minibuffer by
470 *** If `quick-calc' is called with a prefix argument, insert the
471 result of the calculation into the current buffer.
474 ** In Edebug, you can now set the initial mode with C-x C-a C-m. With
475 this you can tell Edebug not to stop at the start of the first
476 instrumented function.
479 *** New minor mode `global-eldoc-mode'
480 *** `eldoc-documentation-function' now defaults to `ignore'
481 *** `describe-char-eldoc' displays information about character at point,
482 and can be used as a default value of `eldoc-documentation-function'. It is
483 useful when, for example, one needs to distinguish various spaces (e.g. ] [,
484 ] [, ] [, etc.) while using mono-spaced font.
489 *** HTML can now be rendered using variable-width fonts.
492 *** A new command `F' (`eww-toggle-fonts') can be used to toggle
493 whether to use variable-pitch fonts or not. The user can also
494 customize the `shr-use-fonts' variable.
497 *** A new command `R' (`eww-readable') will try do identify the main
498 textual parts of a web page and display only that, leaving menus and
499 the like off the page.
502 *** You can now use several eww buffers in parallel by renaming eww
503 buffers you want to keep separate.
506 *** Partial state of the eww buffers (the URIs and the titles of the
507 pages visited) is now preserved in the desktop file.
510 *** `eww-after-render-hook' is now called after eww has rendered
511 the data in the buffer.
514 *** The `eww-reload' command now takes a prefix to not reload via
515 the net, but just use the local copy of the HTML.
518 *** The DOM shr and eww uses has been changed to the general Emacs
519 xml.el/libxml2 DOM, and a new package dom.el has been added to
520 interact with this DOM. See the Emacs Lisp manual for interface
524 *** `mailcap-mime-data' is now consulted when displaying PDF files.
527 *** The new `S' command will list all eww buffers, and allow managing
531 *** https pages with valid certificates have headers marked in green, while
532 invalid certificates are marked in red.
536 *** text/html messages that contain inline image parts will be
537 transformed into multipart/related messages before sending.
540 *** New UPatterns `quote', `app', `cl-struct', and `eieio'.
541 *** New UPatterns can be defined with `pcase-defmacro'.
543 *** New vector QPattern.
546 *** Strings after `:documentation' are highlighted as docstrings.
549 *** Rectangle Mark mode can have corners past EOL or in the middle of a TAB.
550 *** C-x C-x in rectangle-mark-mode now cycles through the four corners.
551 *** `string-rectangle' provides on-the-fly preview of the result.
553 ** New font-lock functions font-lock-ensure and font-lock-flush, which
554 should be used instead of font-lock-fontify-buffer when called from Elisp.
556 ** Macro `minibuffer-with-setup-hook' takes (:append FUN) to mean
557 appending FUN to `minibuffer-setup-hook'.
560 *** New functions cl-fresh-line, cl-digit-char-p and cl-parse-integer.
564 The seq library adds sequence manipulation functions and macros that
565 complement basic functions provided by subr.el. All functions are
566 prefixed with `seq-' and work on lists, strings and vectors.
570 The map library provides map-manipulation functions that work on alists,
571 hash-table and arrays. All functions are prefixed with "map-".
573 ** Calendar and diary
576 *** The default `diary-file' is now located in .emacs.d.
579 *** New commands to insert diary entries with Chinese dates:
580 `diary-chinese-insert-anniversary-entry' `diary-chinese-insert-entry'
581 `diary-chinese-insert-monthly-entry', `diary-chinese-insert-yearly-entry'.
584 *** The calendar can now list and mark diary entries with Chinese dates.
585 See `diary-chinese-list-entries' and `diary-chinese-mark-entries'.
588 *** The option `calendar-mode-line-format' can now be nil,
589 which means to do nothing special with the mode line in calendars.
592 *** New option `calendar-weekend-days'.
593 The option customizes which day headers receive the
594 `calendar-weekend-header' face.
597 *** New optional args N and STRING for ‘holiday-greek-orthodox-easter’.
600 *** Many items obsolete since at least version 23.1 have been removed.
601 The majority were function/variable/face aliases, too numerous to list here.
604 **** Functions `calendar-one-frame-setup', `calendar-only-one-frame-setup',
605 `calendar-two-frame-setup', `european-calendar', `american-calendar'.
607 **** Hooks `cal-menu-load-hook', `cal-x-load-hook'.
609 **** Macro `calendar-for-loop'.
611 **** Variables `european-calendar-style', `diary-face', `hebrew-holidays-{1,4}'.
613 **** The nil and list forms of `diary-display-function'.
615 ** New ERT function `ert-summarize-tests-batch-and-exit'.
617 ** New js.el option `js-indent-first-init'.
620 ** `Info-fontify-maximum-menu-size' can be t for no limit.
623 ** `info-display-manual' can now be given a prefix argument which (any
624 non-nil value) directs the command to limit the completion
625 alternatives to currently visited manuals.
628 ** ntlm.el has support for NTLM2.
632 *** The Rmail commands d, C-d and u take optional repeat counts to delete or
633 undelete multiple messages.
635 *** Rmail can now render HTML mail messages if your Emacs was built with
636 libxml2 or if you have the Lynx browser installed. By default, Rmail
637 will display the HTML version of a mail message that has both HTML and
638 plain text parts, if display of HTML email is possible; customize the
639 `rmail-mime-prefer-html' option to `nil' if you don't want that.
642 *** In the commands that make summaries by subject, recipients, or senders,
643 you can no longer use commas to separate regular expressions.
645 ** SES now supports local printer functions; see `ses-define-local-printer'.
648 *** In sh-mode you can now use `sh-shell' as a file-local variable to
649 specify the type of shell in use (bash, csh, etc).
651 *** New value `always' for sh-indent-after-continuation.
652 This provides old-style ("dumb") indentation of continued lines.
656 *** Fatal TLS errors are now silent by default.
660 *** The URL package accepts now the protocols "ssh", "scp" and "rsync".
661 When `url-handler-mode' is enabled, file operations for these
662 protocols as well as for "telnet" and "ftp" are passed to Tramp.
664 *** The URL package allows customizing the `url-user-agent' string.
665 The new `url-user-agent' variable can be customized to be a string or
668 *** The new interface variable `url-request-noninteractive' can be used
669 to specify that we're running in a noninteractive context, and that
670 we should not be queried about things like TLS certificate validity.
672 *** If URL is used with a https connection, the first callback argument
673 plist will contain a :peer element that has the output of
674 `gnutls-peer-status' (if Emacs is built with GnuTLS support).
679 *** New connection method "nc", which allows to access dumb busyboxes.
682 *** Method-specific parameters can be overwritten now with variable
683 `tramp-connection-properties'.
686 *** Handler for `file-notify-valid-p' for remote machines that support
687 filesystem notifications.
691 *** New user variable `sql-default-directory' enables remote
692 connections using Tramp.
694 *** New command `sql-send-line-and-next' sends the current line to the
695 interactive buffer and advances to the next line, skipping whitespace
698 *** Add support for Vertica SQL.
700 ** VC and related modes
702 *** Basic push support, via `vc-push', bound to `C-x v P'.
703 Implemented for Bzr, Git, Hg. As part of this change, the pre-existing
704 (undocumented) command vc-hg-push now behaves slightly differently.
706 *** The new command vc-region-history shows the log+diff of the active region.
708 *** New option `vc-annotate-background-mode' controls whether
709 the color range from `vc-annotate-color-map' is applied to the
710 background or to the foreground.
712 *** `compare-windows' now compares text with the most recently used window
713 instead of the next window. The new option `compare-windows-get-window-function'
714 allows to customize this.
716 *** Two new faces `compare-windows-removed' and `compare-windows-added'
717 replace the obsolete face `compare-windows'.
720 *** `log-edit-insert-changelog' converts "(tiny change)" to
721 "Copyright-paperwork-exempt: yes". Set `log-edit-rewrite-tiny-change'
724 ** VHDL mode supports VHDL'08.
726 ** Calculator: decimal display mode uses "," groups, so it's more
727 fitting for use in money calculations; factorial works with
730 ** HideIfDef mode now support full C/C++ expressions, argumented macro expansions,
731 interactive macro evaluation and automatic scanning of #defined symbols.
733 *** New custom variable `hide-ifdef-header-regexp' to define C/C++ header file
734 name patterns. Default case-insensitive .h, .hh, .hpp, .hxx, and .h++.
735 *** New custom variable `hide-ifdef-expand-reinclusion-protection' to prevent
736 reinclusion protected header files from being fully hidden.
737 *** New custom variable `hide-ifdef-exclude-define-regexp' to define symbol
738 name patterns (e.g. all "FOR_DOXYGEN_ONLY_*") to be excluded.
742 *** New custom variable `tex-print-file-extension' to help users who
743 use PDF instead of DVI.
745 *** TeX mode now supports Prettify Symbols mode. When enabling
746 `prettify-symbols-mode' in a tex-mode buffer, \alpha ... \omega, and
747 many other math macros are displayed using unicode characters.
749 ** whitespace-mode: new 'big-indent style highlighting too much indentation.
750 By default, 32 spaces and four TABs are considered to be too much but
751 `whitespace-big-indent-regexp' can be configured to change that.
753 ** tildify: `tildify-space-string', `tildify-pattern', and
754 `tildify-foreach-region-function' variables added making
755 `tildify-string-alist', `tildify-pattern-alist', and
756 `tildify-ignored-environments-alist' variables (as well as a few
757 helper functions) obsolete.
760 The new package provides generic framework and new commands to find
761 and move to definitions, as well as pop back to the original location.
764 `xref-find-definitions' replaces `find-tag' and provides an interface
765 to pick one destination among several. Hence, `tags-loop-continue' is
766 unbound. `xref-pop-marker-stack' replaces `pop-tag-mark', but uses an
767 easier binding, which is now unoccupied (`M-,').
768 `xref-find-definitions-other-window' replaces `find-tag-other-window'.
769 `xref-find-definitions-other-frame' replaces `find-tag-other-frame'.
770 `xref-find-apropos' replaces `find-tag-regexp'.
773 `find-tag-marker-ring-length' is now an obsolete alias for
774 `xref-marker-ring-length'. `find-tag-marker-ring' is now an obsolete
775 alias for a private variable. `xref-push-marker-stack' and
776 `xref-pop-marker-stack' should be used to mutate it instead.
779 As a result of the above, these commands are now obsolete:
780 `find-tag-other-window', `find-tag-other-frame', `find-tag-regexp',
781 `tags-apropos' and `tags-loop-continue'.
784 EUDC's LDAP backend has been improved.
786 *** EUDC supports LDAP-over-SSL URLs (ldaps://).
788 *** EUDC passes LDAP passwords through a pipe to the ldapsearch
789 subprocess instead of on the command line.
791 *** EUDC handles LDAP wildcards automatically so the user shouldn't
792 need to configure this manually anymore.
794 *** The LDAP configuration section of EUDC's manual has been
797 There have also been customization changes.
799 *** New custom variable `eudc-server-hotlist' to allow specifying
800 multiple EUDC servers in init file.
802 *** Custom variable `eudc-inline-query-format' defaults to completing
803 on email and firstname instead of surname.
805 *** Custom variable `eudc-expansion-overwrites-query' defaults to nil
806 to avoid interfering with the kill ring.
808 *** Custom variable `eudc-inline-expansion-format' defaults to
809 "Firstname Surname <mail-address>".
811 *** Custom variable `eudc-options-file' defaults to
812 "~/.emacs.d/eudc-options".
814 *** New custom variable `ldap-ldapsearch-password-prompt-regexp' to
815 allow overriding the regular expression that recognizes the ldapsearch
816 command line's password prompt.
821 *** The new built-in command `clear' can scroll window contents out of sight.
822 If provided with an optional non-nil argument, the scrollback contents will be cleared.
824 *** New buffer syntax '#<buffer-name>', which is equivalent to
825 '#<buffer buffer-name>'. This shorthand makes interacting with
826 buffers from eshell more convenient. Custom variable
827 `eshell-buffer-shorthand', which has been broken for a while, has been
830 *** By default, eshell "visual" program buffers (created by
831 `eshell-visual-commands' and similar custom vars) are no longer killed
832 when their processes die. This fixes issues with short-lived commands
833 and makes visual programs more useful in general. For example, if
834 "git log" is a visual command, it will always show the visual command
835 buffer, even if the "git log" process dies. For the old behavior,
836 make the new option `eshell-destroy-buffer-when-process-dies' non-nil.
840 *** Support for the Conkeror web browser.
843 *** Support for several ancient browsers is now officially obsolete.
846 ** tar-mode: new `tar-new-entry' command, allowing for new members to
847 be added to the archive.
850 ** Autorevert: dired buffers are also auto-reverted via file
851 notifications, if Emacs is compiled with file notification support.
854 ** File Notifications: the new function `file-notify-valid-p' checks,
855 whether a file notification descriptor still corresponds to an
863 *** landmark.el (moved to elpa.gnu.org)
866 * New Modes and Packages in Emacs 25.1
868 ** pinentry.el allows GnuPG passphrase to be prompted through the
869 minibuffer instead of a graphical dialog, depending on whether the gpg
870 command is called from Emacs (i.e., INSIDE_EMACS environment variable
871 is set). This feature requires newer versions of GnuPG (2.1.5 or
872 later) and Pinentry (0.9.5 or later).
874 ** cl-generic.el provides CLOS-style multiple-dispatch generic functions.
876 ** scss-mode (a minor variant of css-mode)
878 ** let-alist is a new macro (and a package) that allows one to easily
879 let-bind the values stored in an alist.
881 ** `tildify-mode' allows to automatically insert hard spaces as one
882 types the text. Breaking line after a single-character words is
883 forbidden by Czech and Polish typography (and may be discouraged in
884 other languages), so `auto-tildify-mode' makes it easier to create
885 a typographically-correct documents.
887 * Incompatible Lisp Changes in Emacs 25.1
889 ** `syntax-begin-function' is declared obsolete.
890 Removed font-lock-beginning-of-syntax-function and the SYNTAX-BEGIN
891 slot in font-lock-defaults.
894 ** `package-initialize' now sets `package-enable-at-startup' to nil if
895 called during startup. Users who call this function in their init
896 file and still expect it to be run after startup should set
897 `package-enable-at-startup' to t after the call to
898 `package-initialize'.
900 ** `:global' minor mode use `setq-default' rather than `setq'.
901 This means that you can't use `make-local-variable' and expect them to
902 "magically" become buffer-local.
904 ** `inhibit-point-motion-hooks' now defaults to t and is obsolete.
907 ** `track-mouse' no longer freezes the shape of the mouse pointer.
908 The `track-mouse' form no longer refrains from changing the shape of
909 the mouse pointer for the entire time the body of that form is
910 executed. Lisp programs that use `track-mouse' for dragging across
911 large portions of the Emacs display, and want to avoid changes in the
912 pointer shape during dragging, should bind the variable `track-mouse'
913 to the special value `dragging' in the body of the form.
915 ** The optional `predicate' argument of `lisp-complete-symbol' no longer
916 has any effect. (This change was made in Emacs 24.4 but was not
917 advertised at the time.)
919 ** `indirect-function' does not signal `void-function' any more.
920 This is mostly a bug-fix, since this change was missed back in 24.4 when
921 symbol-function was changed not to signal `void-function' any more.
922 *** As a consequence, the second arg of `indirect-function' is now obsolete.
924 ** Comint, term, and compile do not set the EMACS env var any more.
925 Use the INSIDE_EMACS environment variable instead.
927 ** `save-excursion' does not save&restore the mark any more.
929 ** read-buffer-function can now be called with a 4th argument (`predicate').
931 ** completion-table-dynamic stays in the minibuffer.
932 If you want the old behavior of calling the function in the buffer
933 from which the minibuffer was entered, call it with the new argument
936 ** window-configurations no longer record the buffers' marks.
938 ** inhibit-modification-hooks now also inhibits lock-file checks, as well as
939 active region handling.
941 ** deactivate-mark is now buffer-local.
943 ** `cl-the' now asserts that its argument is of the given type.
945 ** `process-running-child-p` may now return a numeric process
946 group ID instead of `t'.
949 ** Mouse click events on mode line or header line no longer include
950 any reference to a buffer position. The 6th member of the mouse
951 position list returned for such events is now nil.
953 ** Menu items in keymaps do not support the "key shortcut cache" any more.
954 These slots used to hold key-shortcut data, but have been obsolete since
957 ** Emacs no longer downcases the first letter of a system diagnostic
958 when signaling a file error. For example, it now reports "Permission
959 denied" instead of "permission denied". The old behavior was problematic
960 in languages like German where downcasing rules depend on grammar.
963 ** New variable ‘text-quoting-style’ to control how Emacs translates quotes.
964 Set it to ‘curve’ for curved single quotes ‘like this’, to ‘straight’
965 for straight apostrophes 'like this', and to ‘grave’ for grave accent
966 and apostrophe `like this'. The default value nil acts like ‘curve’
967 if curved single quotes are displayable, and like ‘grave’ otherwise.
968 The new variable affects display of diagnostics and help, but not of info.
971 ** substitute-command-keys now replaces quotes.
972 That is, it converts documentation strings’ quoting style as per the
973 value of ‘text-quoting-style’. Doc strings in source code can use
974 either curved single quotes or grave accents and apostrophes. As
975 before, characters preceded by \= are output as-is.
978 ** Message-issuing functions ‘error’, ‘message’, etc. now convert quotes.
979 They use the new ‘format-message’ function instead of plain ‘format’,
980 so that they now follow user preference as per ‘text-quoting-style’
981 when processing curved single quotes, grave accents, and apostrophes
982 in their format argument.
985 ** The character classes [:alpha:] and [:alnum:] in regular expressions
986 now match multibyte characters using Unicode character properties.
987 If you want the old behavior where they matched any character with
988 word syntax, use `\sw' instead.
991 ** The character classes [:graph:] and [:print:] in regular expressions
992 no longer match every multibyte character. Instead, Emacs now
993 consults the Unicode character properties to determine which
994 characters are graphic or printable. In particular, surrogates and
995 unassigned codepoints are now rejected. If you want the old behavior,
996 use [:multibyte:] instead.
999 ** The `diff' command uses the unified format now. To restore the old
1000 behavior, set `diff-switches' to `-c'.
1002 ** `grep-template' and `grep-find-template' values don't include the
1003 --color argument anymore. It's added at the <C> place holder position
1004 dynamically. Any third-party code that changes these templates should
1005 be updated accordingly.
1008 ** ‘(/ N)’ is now equivalent to ‘(/ 1 N)’ rather than to ‘(/ N 1)’.
1009 The new behavior is compatible with Common Lisp and with XEmacs.
1010 This change does not affect Lisp code intended to be portable to
1011 Emacs 24.2 and earlier, which did not support unary ‘/’.
1014 * Lisp Changes in Emacs 25.1
1016 ** syntax-propertize is now automatically called on-demand during forward
1017 parsing functions like `forward-sexp'.
1019 ** New hooks prefix-command-echo-keystrokes-functions and
1020 prefix-command-preserve-state-hook, to allow the definition of prefix
1021 commands other than the predefined C-u.
1023 ** New functions `filepos-to-bufferpos' and `bufferpos-to-filepos'.
1025 ** The default value of `load-read-function' is now `read'.
1027 ** New hook `pre-redisplay-functions', a bit easier to use than pre-redisplay-function.
1029 ** The second arg of `looking-back' should always be provided explicitly.
1031 ** Obsolete text properties `intangible', `point-entered', and `point-left'.
1032 Replaced by properties `cursor-intangible' and `cursor-sensor-functions',
1033 implemented by the new `cursor-intangible-mode' and
1034 `cursor-sensor-mode' minor modes.
1036 ** New process type `pipe', which can be used in combination with the
1037 `:stderr' keyword of make-process to handle standard error output
1040 ** New function `make-process' provides an alternative interface to
1041 `start-process'. It allows programs to set process parameters such as
1042 process filter, sentinel, etc., through keyword arguments (similar to
1043 `make-network-process').
1045 ** `read-buffer' takes a new `predicate' argument.
1047 ** Emacs Lisp now supports generators.
1049 ** New finalizer facility for running code when objects
1052 ** lexical closures can use (:documentation <form>) to build their docstring.
1053 It should be placed right where the docstring would be, and <form> is then
1054 evaluated (and should return a string) when the closure is built.
1056 ** define-inline provides a new way to define inlinable functions.
1058 ** New function `macroexpand-1' to perform a single step of macroexpansion.
1060 ** Some "x-*" were obsoleted:
1061 *** x-select-text is renamed gui-select-text.
1062 *** x-selection-value is renamed gui-selection-value.
1063 *** x-get-selection is renamed gui-get-selection.
1064 *** x-get-clipboard and x-clipboard-yank are marked obsolete.
1065 *** x-get-selection-value is renamed to gui-get-primary-selection.
1066 *** x-set-selection is renamed to gui-set-selection
1068 ** New function `string-greaterp', which return the opposite result of
1071 ** New function `alist-get', which is also a valid place (aka lvalue).
1073 ** New function `funcall-interactively', which works like `funcall'
1074 but makes `called-interactively-p' treat the function as (you guessed it)
1075 called interactively.
1077 ** New function `function-put' to use instead of `put' for function properties.
1080 ** New properties that can be specified with `declare':
1081 *** (interactive-only INSTEAD), says to use INSTEAD for non-interactive use.
1082 *** (pure VAL), if VAL is non-nil, indicates the function is pure.
1083 *** (side-effect-free VAL), if VAL is non-nil, indicates the function does not
1087 ** New macro `with-file-modes', for evaluating expressions with default file
1088 permissions set to temporary values (e.g., for creating private files).
1090 ** You can access the slots of structures using `cl-struct-slot-value'.
1092 ** Function `sort' can deal with vectors.
1094 ** Function `system-name' now returns an updated value if the current
1095 system's name has changed or if the Emacs process has changed systems,
1096 and to avoid long waits it no longer consults DNS to canonicalize the
1097 name. The variable `system-name' is now obsolete.
1100 ** Function `write-region' no longer outputs "Wrote FILE" in batch mode.
1102 ** If `pwd' is called with a prefix argument, insert the current default
1106 ** New utilities in subr-x.el:
1107 *** New macros `if-let' and `when-let' allow defining bindings and to
1108 execute code depending whether all values are true.
1109 *** New macros `thread-first' and `thread-last' allow threading a form
1110 as the first or last argument of subsequent forms.
1113 ** Documentation strings now support quoting with curved single quotes
1114 ‘like-this’ in addition to the old style with grave accent and
1115 apostrophe `like-this'. The new style looks better on today's displays.
1116 In the new Electric Quote mode, you can enter curved single quotes
1117 into documentation by typing ` and '. Outside Electric Quote mode,
1118 you can enter them by typing ‘C-x 8 [’ and ‘C-x 8 ]’, or (if your Alt
1119 key works) by typing ‘A-[’ and ‘A-]’. As described above under
1120 ‘text-quoting-style’, the user can specify how to display doc string
1124 ** New function ‘format-message’ is like ‘format’ and also converts
1125 curved single quotes, grave accents and apostrophes as per
1126 ‘text-quoting-style’.
1129 ** show-help-function's arg is converted via substitute-command-keys
1130 before being passed to the function. Help strings, help-echo
1131 properties, etc. can therefore contain command key escapes and
1135 ** Time-related changes:
1137 *** Time conversion functions now accept an optional ZONE argument
1138 that specifies the time zone rules for conversion. ZONE is omitted or
1139 nil for Emacs local time, t for Universal Time, ‘wall’ for system wall
1140 clock time, or a string as in ‘set-time-zone-rule’ for a time zone
1141 rule. The affected functions are ‘current-time-string’,
1142 ‘current-time-zone’, ‘decode-time’, and ‘format-time-string’. The
1143 function ‘encode-time’, which already accepted a simple time zone rule
1144 argument, has been extended to accept all the new forms.
1146 *** Time-related functions now consistently accept numbers
1147 (representing seconds since the epoch) and nil (representing the
1148 current time) as well as the usual list-of-integer representation.
1149 Affected functions include `current-time-string', `current-time-zone',
1150 `decode-time', `float-time', `format-time-string', `seconds-to-time',
1151 `time-add', `time-less-p', `time-subtract', `time-to-day-in-year',
1152 `time-to-days', and `time-to-seconds'.
1154 *** The `encode-time-value' and `with-decoded-time-value' macros have
1157 *** `calendar-next-time-zone-transition', `time-add', and
1158 `time-subtract' no longer return time values in the obsolete and
1159 undocumented integer-pair format. Instead, they return a list of two
1163 ** New function `set-binary-mode' allows to switch a standard stream
1164 of the Emacs process to binary I/O mode.
1166 ** ASCII approximations to curved quotes are put in standard-display-table
1167 if the terminal cannot display curved quotes.
1169 ** Standard output and error streams now transliterate characters via
1170 standard-display-table, and encode output using locale-coding-system.
1172 ** Miscellaneous name change
1174 For consistency with the usual Emacs spelling, the Lisp variable
1175 `hfy-optimisations' has been renamed to `hfy-optimizations'.
1176 The old name should still work, as an obsolescent alias.
1179 * Changes in Frames and Windows Code in Emacs 25.1
1182 ** Emacs can now draw horizontal scroll bars on some platforms that
1183 provide toolkit scroll bars, namely Gtk+, Lucid, Motif and Windows.
1184 Horizontal scroll bars are turned off by default.
1185 *** New function `horizontal-scroll-bars-available-p' telling whether
1186 horizontal scroll bars are available on the underlying system.
1187 *** New mode `horizontal-scroll-bar-mode' to toggle horizontal scroll
1188 bars on all existing and future frames.
1189 *** New function `toggle-horizontal-scroll-bar' to toggle horizontal
1190 scroll bars on the selected frame.
1191 *** New frame parameters `horizontal-scroll-bars' and
1192 `scroll-bar-height' to set horizontal scroll bars and their height
1193 for individual frames and in `default-frame-alist'.
1194 *** New functions `frame-scroll-bar-height' and
1195 `window-scroll-bar-height' return the height of horizontal scroll
1196 bars on a specific frame or window.
1197 *** `set-window-scroll-bars' now accepts five parameters where the last
1198 two specify height and type of the window's horizontal scroll bar.
1199 *** `window-scroll-bars' now returns type and sizes of horizontal scroll
1201 *** New buffer-local variables `horizontal-scroll-bar' and
1202 `scroll-bar-height'.
1205 ** New functions `frame-geometry' and `frame-edges' give access to a
1209 ** New functions `mouse-absolute-pixel-position' and
1210 `set-mouse-absolute-pixel-position' get/set screen coordinates of the
1214 ** The function `window-edges' now accepts three additional arguments to
1215 retrieve body, absolute and pixel edges of the window.
1218 ** The functions `window-inside-edges', `window-inside-pixel-edges' and
1219 `window-inside-absolute-pixel-edges' have been renamed to respectively
1220 `window-body-edges', `window-body-pixel-edges' and
1221 `window-absolute-body-pixel-edges'. The old names are kept as aliases.
1224 ** New function `window-absolute-pixel-position' to get the screen
1225 coordinates of a visible buffer position.
1228 ** The height of a frame's menu and tool bar are no longer counted in the
1229 frame's text height. This means that the text height stands only for
1230 the height of the frame's root window plus that of the echo area (if
1231 present). This was already the behavior for frames with external tool
1232 and menu bars (like in the Gtk builds) but has now been extended to all
1236 ** Frames now do not necessarily preserve the number of columns or lines
1237 they display when setting default font, menu bar, fringe width, or
1238 scroll bars. In particular, maximized and fullscreen frames are
1239 conceptually never resized if such settings change. For fullheight and
1240 fullwidth frames, the behavior may depend on the toolkit used.
1241 *** New option `frame-inhibit-implied-resize' if non-nil, means that
1242 setting default font, menu bar, fringe width, or scroll bars of a
1243 specific frame does not resize that frame in order to preserve the
1244 number of columns or lines it displays.
1247 ** New function `window-preserve-size' allows to preserve the size of
1248 windows without "fixing" it. It's supported by `fit-window-to-buffer',
1249 `temp-buffer-resize-mode' and `display-buffer'.
1252 ** New minor mode `window-divider-mode' and options
1253 `window-divider-default-places', `window-divider-default-bottom-width'
1254 and `window-divider-default-right-width'.
1257 ** New option `switch-to-buffer-in-dedicated-window' allows to customize
1258 how `switch-to-buffer' proceeds interactively when the selected window
1259 is strongly dedicated to its buffer.
1262 ** The option `even-window-heights' has been renamed to
1263 `even-window-sizes' and now handles window widths as well.
1265 ** Tearoff menus and detachable toolbars for Gtk+ has been removed.
1266 Those features have been deprecated in Gtk+ for a long time.
1270 *** etags no longer qualifies class members by default.
1271 By default, `etags' will not qualify class members for C-like
1272 object-oriented languages with their class names and namespaces, and
1273 will remove qualifications used explicitly in the code from the tag
1274 names it puts in TAGS files. This is so the etags.el back-end for
1275 `xref-find-definitions' is more accurate and produces less false
1278 Use --class-qualify (-Q) if you want the old default behavior of
1279 qualifying class members in C++, Java, and Objective C. Note that
1280 using -Q might make some class members become "unknown" to `M-.'
1281 (`xref-find-definitions'); if so, you can use `C-u M-.' to specify the
1282 qualified names by hand.
1285 * Changes in Emacs 25.1 on Non-Free Operating Systems
1288 ** MS-Windows specific Emacs build scripts are no longer in the distribution
1289 This includes the makefile.w32-in files in various subdirectories, and
1290 the support files. The file nt/configure.bat now just tells the user
1291 to use the procedure described in nt/INSTALL, by running the Posix
1292 `configure' script in the top-level directory.
1295 ** Building Emacs for MS-Windows requires at least Windows XP
1296 or Windows Server 2003. The built binaries still run on all versions
1297 of Windows starting with Windows 9X.
1300 ** Emacs running on MS-Windows now supports the daemon mode.
1302 ** The byte counts in etags-generated TAGS files are now the same on
1303 MS-Windows as they are on other platforms.
1306 ** On OS X, configure creates a Cocoa ("Nextstep") build by default.
1307 Pass '--without-ns' to configure to create an X11 build, the old default.
1309 ** OS X 10.5 or older is no longer supported.
1311 ** OS X on PowerPC is no longer supported.
1314 ** The new function 'w32-application-type' returns the type of an
1315 MS-Windows application given the name of its executable program file.
1318 ----------------------------------------------------------------------
1319 This file is part of GNU Emacs.
1321 GNU Emacs is free software: you can redistribute it and/or modify
1322 it under the terms of the GNU General Public License as published by
1323 the Free Software Foundation, either version 3 of the License, or
1324 (at your option) any later version.
1326 GNU Emacs is distributed in the hope that it will be useful,
1327 but WITHOUT ANY WARRANTY; without even the implied warranty of
1328 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1329 GNU General Public License for more details.
1331 You should have received a copy of the GNU General Public License
1332 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
1338 paragraph-separate: "[
\f]*$"