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.
32 ** Building Emacs now requires GNU make, version 3.81 or later.
35 ** New configure option --with-cairo.
36 This builds Emacs with Cairo drawing. As a side effect, it provides
37 support for built-in printing, when Emacs was built with GTK+.
39 ** New configure option --with-modules.
40 This enables support for loading dynamic modules; see below.
43 ** By default, Emacs no longer works on IRIX. We expect that Emacs
44 users are not affected by this, as SGI stopped supporting IRIX in
45 December 2013. If you are affected, please send a bug report. You
46 should be able to work around the problem either by porting the Emacs
47 undumping code to GCC under IRIX, or by configuring --with-wide-int,
48 or by sticking with Emacs 24.4.
51 ** The Emacs garbage collector assumes GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS.
52 The GC_MAKE_GCPROS_NOOPS stack-marking variant has been the default
53 since Emacs 24.4, and the other variants were undocumented and were
54 obstacles to maintenance and development. GC_MARK_STACK and its
55 related symbols have been removed from the C internals.
58 ** 'configure' now prefers gnustep-config when configuring GNUstep.
59 If gnustep-config is not available, the old heuristics are used.
62 ** 'configure' now prefers inotify to gfile for file notification,
63 unless gfile is explicitly requested via --with-file-notification='gfile'.
66 ** The configure option '--with-pkg-config-prog' has been removed.
67 Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to.
70 ** The configure option '--with-mmdf' has been removed.
71 It was no longer useful, as it relied on libraries that are no longer
72 supported, and its presence led to confusion during configuration.
73 This affects only the 'movemail' utility; Emacs itself can still
74 process MMDF-format files as before.
77 ** The configure option '--enable-silent-rules' is now the default,
78 and silent rules are now quieter. To get the old behavior where
79 'make' chatters a lot, configure with '--disable-silent-rules' or
80 build with 'make V=1'.
83 ** The configure option '--with-gameuser' now allows to specify a
84 group instead of a user if its argument is prefixed by ':' (a colon).
85 This will cause the game score files in ${localstatedir}/games/emacs
86 to be owned by that group, and the helper program for updating them to
87 be installed setgid. The option now defaults to the 'games' group.
90 ** The `grep-changelog' script (and its manual page) are no longer included.
91 It has no particular connection to Emacs and has not changed in years,
92 so if you want to use it, you can always take a copy from an older Emacs.
95 ** Emacs 25 comes with a new set of icons.
96 Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png.
97 The old Emacs logo icons are available as `emacs23.png' in the same location.
100 * Startup Changes in Emacs 25.1
103 ** When Emacs is given a file as a command line argument and
104 `initial-buffer-choice' is non-nil, display both the file and
105 `initial-buffer-choice'. When Emacs is given more than one file and
106 `initial-buffer-choice' is non-nil, show `initial-buffer-choice'
107 and *Buffer List*. This makes Emacs convenient to use from the
108 command line when `initial-buffer-choice' is non-nil.
111 ** The value of ‘initial-scratch-message’ is now treated as a doc string
112 and can contain escape sequences for command keys, quotes, and the like.
115 * Changes in Emacs 25.1
118 ** Any file of the form .dir-locals*.el is now considered a dir-local
119 file, and multiple such files can be used in the same directory. See
120 the variable `dir-locals-file' for more information.
123 ** `xref-find-definitions' and `describe-function' now display
124 information about mode local overrides (defined by cedet/mode-local.el
125 `define-overloadable-function' `define-mode-local-overrides').
128 ** New `display-buffer' action function `display-buffer-use-some-frame'.
129 This displays the buffer in an existing frame other than the current
130 frame, and allows the caller to specify a frame predicate to exclude
134 ** New documentation command `describe-symbol'.
135 Works for functions, variables, faces, etc. It is bound to `C-h o' by
139 ** New function `custom-prompt-customize-unsaved-options' checks for
140 unsaved customizations and prompts user to customize (if found). It
141 is intended for adding to 'kill-emacs-query-functions'.
144 ** Network security (TLS/SSL certificate validity and the like) is
145 added via the new Network Security Manager (NSM) and controlled via
146 the `network-security-level' variable.
148 ** C-h l now also lists the commands that were run.
150 ** M-x suggests shorthands and ignores obsolete commands for completion.
151 ** x-select-enable-clipboard is renamed select-enable-clipboard.
152 x-select-enable-primary and renamed select-enable-primary.
153 Additionally they both now apply to all systems (OSX, GNUstep, Windows, you
154 name it), with the proviso that on some systems (e.g. Windows)
155 select-enable-primary is ineffective since the system doesn't
156 have the equivalent of a primary selection.
159 ** terpri gets an optional arg ENSURE to conditionally output a newline.
162 ** New macro `define-advice'.
164 ** `insert-register' now leaves point after the inserted text
165 when called interactively. A prefix argument toggles this behavior.
167 ** New var `truncate-string-ellipsis' to choose how to indicate truncation.
170 ** The new variable `term-file-aliases' replaces some files from lisp/term.
171 The function `tty-run-terminal-initialization' consults this variable
172 when deciding what terminal-specific initialization code to run.
175 ** New variable `system-configuration-features', listing some of the
176 main features that Emacs was compiled with. This is mainly intended
177 for use in Emacs bug reports.
180 ** A password is now hidden also when typed in batch mode. Another
181 hiding character but the default `.' can be used by let-binding the
182 variable `read-hide-char'.
184 ** The new functions `string-collate-lessp' and `string-collate-equalp'
185 preserve the collation order as defined by the system's locale(1)
186 environment. For the time being this is implemented for modern POSIX
187 systems and for MS-Windows, for other systems they fall back to their
188 counterparts `string-lessp' and `string-equal'.
190 *** The ls-lisp package uses `string-collate-lessp' to sort file names.
191 If you want the old, locale-independent sorting, customize the new
192 option `ls-lisp-use-string-collate' to a nil value.
194 *** The MS-Windows specific variable `w32-collate-ignore-punctuation',
195 if set to a non-nil value, causes the above 2 functions to ignore
196 symbol and punctuation characters when collating strings. This
197 emulates the behavior of modern Posix platforms when the locale's
198 codeset is "UTF-8" (as in "en_US.UTF-8"). This is needed because
199 MS-Windows doesn't support UTF-8 as codeset in its locales.
202 ** The new function `bidi-find-overridden-directionality' allows to
203 find characters whose directionality was, perhaps maliciously,
204 overridden by directional override control characters. Lisp programs
205 can use this to detect potential phishing of URLs and other links that
206 exploits bidirectional display reordering.
209 ** The new function `buffer-substring-with-bidi-context' allows to
210 copy a portion of a buffer into a different location while preserving
211 the visual appearance both of the copied text and the text at
212 destination, even when the copied text includes mixed bidirectional
213 text and directional control characters.
215 ** New variable `ns-use-fullscreen-animation' controls animation for
216 non-native NS fullscreen. The default is nil. Set to t to enable
217 animation when entering and leaving fullscreen. For native OSX fullscreen
220 ** A new text property `inhibit-read-only' can be used in read-only
221 buffers to allow certain parts of the text to be writable.
223 ** A new function `directory-files-recursively' returns all matching
224 files (recursively) under a directory.
226 ** The new function `directory-name-p' can be used to check whether a file
227 name (as returned from, for instance, `file-name-all-completions' is
228 a directory file name. It returns non-nil if the last character in
229 the name is a forward slash.
232 ** New variable `fast-but-imprecise-scrolling' inhibits
233 fontification during full screen scrolling operations, giving less
234 hesitant operation during auto-repeat of C-v, M-v at the cost of
235 possible inaccuracies in the end position.
237 ** The function `font-info' now returns more details about a font.
238 In particular, it now returns the average width of the font's
239 characters, which can be used for geometry-related calculations.
241 ** A new function `default-font-width' returns the average width of a
242 character in the current buffer's default font. If the default face
243 is remapped (see `face-remapping-alist'), the value for the remapped
244 face is returned. This function complements the existing function
245 `default-font-height'.
247 ** New functions `window-font-height' and `window-font-width' return
248 the height and average width of characters in a specified face and
249 window. If FACE is remapped (see `face-remapping-alist'), the
250 function returns the information for the remapped face.
252 ** A new function `window-max-chars-per-line' returns the maximal
253 number of characters that can be displayed on one line. If a face
254 and/or window are provided, these values are used for the
255 calculation. This function is different from `window-body-width' in
256 that it accounts for (i) continuation glyphs, (ii) the size of the
257 font, and (iii) the specified window.
259 ** New possible value for `system-type': nacl.
262 ** New variable `inhibit-message', when bound to non-nil, inhibits
263 `message' and related functions from displaying messages the Echo
264 Area. The output is still logged to the *Messages* buffer.
267 ** It is now safe for a mode that derives `tabulated-list-mode' to not
268 call `tabulated-list-init-header', in which case it will have no
272 ** `tabulated-list-print' takes a second optional argument, update,
273 which specifies an alternative printing method which is faster when
274 few or no entries have changed.
276 ** Emacs can now load shared/dynamic libraries (modules).
277 A dynamic Emacs module is a shared library that provides additional
278 functionality for use in Emacs Lisp programs, just like a package
279 written in Emacs Lisp would. The functions `load', `require',
280 `load-file', etc. were extended to load such modules, as they do with
281 Emacs Lisp packages. The new variable `module-file-suffix' holds the
282 system-dependent value of the file-name extension (`.so' on Posix
283 hosts) of the module files.
285 A module should export a C-callable function named
286 `emacs_module_init', which Emacs will call as part of the call to
287 `load' or `require' which loads the module. It should also export a
288 symbol named `plugin_is_GPL_compatible' to indicate that its code is
289 released under the GPL or compatible license; Emacs will refuse to
290 load modules that don't export such a symbol.
292 If a module needs to call Emacs functions, it should do so through the
293 API defined and documented in the header file `emacs-module.h'. Note
294 that any module that provides Lisp-callable functions will have to use
295 Emacs functions such as `fset' and `funcall', in order to register its
296 functions with the Emacs Lisp interpreter.
298 Modules can create `user-ptr' Lisp objects that embed pointers to C
299 struct's defined by the module. This is useful for keeping around
300 complex data structures created by a module, to be passed back to the
301 module's functions. User-ptr objects can also have associated
302 "finalizers" -- functions to be run when the object is GC'ed; this is
303 useful for freeing any resources allocated for the underlying data
304 structure, such as memory, open file descriptors, etc. A new
305 predicate `user-ptr-p' returns non-nil if its argument is a `usr-ptr'
308 Loadable modules in Emacs are an experimental feature, and subject to
309 change in future releases. For that reason, their support is disabled
310 by default, and must be enabled by using the `--with-modules' option
313 ** New input method: `tamil-dvorak'.
316 * Editing Changes in Emacs 25.1
318 ** Successive single-char deletions are collapsed in the undo-log just like
319 successive char insertions.
322 ** New command `comment-line' bound to `C-x C-;'.
324 ** Unicode names entered via C-x 8 RET now use substring completion by default.
326 ** C-x 8 now has shorthands for these chars: ‐ ‑ ‒ – — ― ‘ ’ “ ” † ‡ • ′ ″
327 € № ← → ↔ − ≈ ≠ ≤ ≥. As before, you can type C-x 8 C-h to list shorthands.
329 ** New minor mode electric-quote-mode for quoting ‘like this’ and “like this”
330 as you type. See also the new variable ‘text-quoting-style’.
332 ** New minor mode global-eldoc-mode is enabled by default.
334 ** Emacs now supports "bracketed paste mode" when running on a terminal
335 that supports it. This facility allows Emacs to understand pasted
336 chunks of text as strings to be inserted, instead of interpreting each
337 character in the pasted text as actual user input. This results in a
338 paste experience similar to that under a window system, and significant
339 performance improvements when pasting large amounts of text.
341 ** Emacs now supports the latest version of the UBA.
342 The Emacs implementation of the Unicode Bidirectional Algorithm (UBA)
343 was updated to support all the latest additions and changes introduced
344 in Unicode Standard versions 6.3, 7.0, and the latest Unicode 8.0.
345 This includes full support for directional isolates and the
346 Bidirectional Parentheses Algorithm (BPA) specified by these Unicode
349 ** You can access `mouse-buffer-menu' (C-down-mouse-1) using C-f10.
352 ** New buffer-local `electric-pair-local-mode'.
355 * Changes in Specialized Modes and Packages in Emacs 25.1
360 *** New command `checkdoc-package-keywords' checks if the
361 current package keywords are recognized. Set the new option
362 `checkdoc-package-keywords-flag' to non-nil to make
363 `checkdoc-current-buffer' call this function automatically.
366 *** New function `checkdoc-file' checks for style errors.
367 It's meant for use together with `compile':
368 emacs -batch --eval "(checkdoc-file \"subr.el\")"
370 ** New function `bookmark-set-no-overwrite' bound to C-x r M.
371 It raises an error if a bookmark of that name already exists,
372 unlike `bookmark-set' which silently updates an existing bookmark.
376 *** `json-pretty-print' and `json-pretty-print-buffer' now maintain
377 the ordering of object keys by default.
379 *** New commands `json-pretty-print-ordered' and
380 `json-pretty-print-buffer-ordered' pretty prints JSON objects with
381 object keys sorted alphabetically.
383 ** You can recompute the VC state of a file buffer with `M-x vc-refresh-state'
384 ** Prog mode has some support for multi-mode indentation.
385 See `prog-indentation-context' and `prog-widen'.
387 ** Prettify Symbols mode
388 *** Prettify Symbols mode supports custom composition predicates. By
389 overriding the default `prettify-symbols-compose-predicate', modes can
390 specify in which contexts a symbol map be composed to some unicode
391 character. `prettify-symbols-default-compose-p' is the default which
392 is suitable for most programming languages such as C or Lisp (but not
395 *** Symbols can be unprettified while point is inside them.
396 New variable `prettify-symbols-unprettify-at-point' configures this.
398 ** New `xterm-screen-extra-capabilities' config.
400 ** The `save-place' variable is replaced by a `save-place-mode'.
404 *** Hide message types by network or channel. `erc-hide-list' will
405 hide all messages of the specified type, where `erc-network-hide-list'
406 and `erc-channel-hide-list' will only hide the specified message types
407 for the respective specified targets.
410 *** `midnight-mode' is a proper minor mode.
411 *** clean-buffer-*-regexps can now specify buffers via predicate functions.
413 ** In xterms, killing text now also sets the CLIPBOARD/PRIMARY selection
414 in the surrounding GUI (using the OSC-52 escape sequence). This only works
415 if your xterm supports it and enables the `allowWindowOps' options (disabled
416 by default at least in Debian, for security reasons).
418 Similarly, you can yank the CLIPBOARD/PRIMARY selection (using the OSC-52
419 escape sequence) if your xterm has the feature enabled but for that you
420 additionally need to add `getSelection' to `xterm-extra-capabilities'.
422 ** xterm-mouse-mode now supports mouse-tracking (if your xterm supports it).
426 *** New "external" package status.
427 An external package is any installed package that's not built-in and
428 not from `package-user-dir', which usually means it's from an entry in
429 `package-directory-list'. They are treated much like built-in
430 packages, in that they cannot be deleted through the package menu and
431 are not considered for upgrades.
433 The effect, is that a user can manually place a specific version of a
434 package inside `package-directory-list' and the package menu will
437 *** If a package is available on multiple archives and one has higher
438 priority (as per `package-archive-priorities') only that one is
439 listed. This can be configured with `package-menu-hide-low-priority'.
441 *** `package-menu-toggle-hiding' now toggles the hiding of packages.
442 This includes the above-mentioned low-priority packages, as well as
443 available packages whose version is lower than the currently installed
444 version (which were previously impossible to display).
445 This allows users to downgrade a package if a lower version is
448 *** When filtering the package menu, keywords starting with "arc:" or
449 "status:" represent package archive or status, respectively, instead
452 *** Most functions which involve downloading information now take an
453 ASYNC argument. If it is non-nil, package.el performs the download(s)
456 *** New variable `package-menu-async' controls whether the
457 package-menu uses asynchronous downloads.
459 *** `package-install-from-buffer' and `package-install-file' work on directories.
460 This follows the same rules as installing from a .tar file, except the
461 -pkg file is optional.
463 *** Packages which are dependencies of other packages cannot be deleted.
464 The FORCE argument to `package-delete' overrides this.
466 *** New custom variable `package-selected-packages' tracks packages
467 which were installed by the user (as opposed to installed as
468 dependencies). This variable can also be manually customized.
470 *** New command `package-install-user-selected-packages' installs all
471 packages from `package-selected-packages' which are currently missing.
473 *** New command `package-autoremove' removes all packages which were
474 installed strictly as dependencies but are no longer needed.
478 When you invoke `shell' interactively, the *shell* buffer will now
479 display in a new window. However, you can customize this behavior via
480 the `display-buffer-alist' variable. For example, to get
481 the old behavior -- *shell* buffer displays in current window -- use
482 (add-to-list 'display-buffer-alist
483 '("^\\*shell\\*$" . (display-buffer-same-window))).
487 *** The `:protection' slot option is not obeyed any more.
489 *** The `newname' argument to constructors is optional&deprecated.
490 If you need your objects to be named, do it by inheriting from `eieio-named'.
492 *** The <class>-list-p and <class>-child-p functions are declared obsolete.
494 *** The <class> variables are declared obsolete.
496 *** The <initarg> variables are declared obsolete.
497 *** defgeneric and defmethod are declared obsolete.
499 *** `constructor' is now an obsolete alias for `make-instance'.
502 *** New command `ido-bury-buffer-at-head' bound to C-S-b
503 Bury the buffer at the head of `ido-matches', analogous to how C-k
504 kills the buffer at head.
505 *** A prefix argument to `ido-restrict-to-matches' will reverse its
506 meaning, and the list is restricted to those elements that do not
507 match the current input.
511 *** You can use <up> and <down> keys to move point in the multi-line
512 minibuffer just as in an ordinary buffer. Only when point moves over
513 the bottom/top of the minibuffer it goes to the next/previous history
514 element. The new commands bound to <up> and <down> in the minibuffer:
515 `next-line-or-history-element' and `previous-line-or-history-element'.
517 ** Search and Replace
520 *** New user option `search-default-regexp-mode'
521 specifies the default mode for I-search.
524 *** `isearch' and `query-replace' can now perform character folding in matches.
525 Isearch does that by default, while `query-replace' will do that if
526 the new variable `replace-character-fold' is customized to a non-nil
527 value. This is analogous to case folding, but instead of disregarding
528 case variants, it disregards wider classes of distinctions between
529 similar characters. (Case folding is a special case of character
530 folding.) This means many characters in the search string will match
531 entire groups of characters instead of just themselves.
533 For instance, the " will match all variants of double quotes (like “
534 and ”), and the letter a will match all of its accented cousins, even
535 those composed of multiple characters, as well as many other symbols
539 *** New function `character-fold-to-regexp' can be used
540 by searching commands to produce a regexp matching anything that
541 character-folds into STRING.
544 *** The new M-s M-w key binding uses eww to search the web for the
545 text in the region. The search engine to use for this is specified by
546 the customizable variable `eww-search-prefix'.
549 *** Query-replace history is enhanced.
550 When query-replace reads the FROM string from the minibuffer, typing
551 `M-p' will now show previous replacements as "FROM SEP TO", where FROM
552 and TO are the original text and its replacement, and SEP is an arrow
553 string defined by the new variable `query-replace-from-to-separator'.
554 To select a prior replacement, type `M-p' until the desired
555 replacement appears in the minibuffer, and then exit the minibuffer by
560 *** If `quick-calc' is called with a prefix argument, insert the
561 result of the calculation into the current buffer.
564 ** In Edebug, you can now set the initial mode with C-x C-a C-m. With
565 this you can tell Edebug not to stop at the start of the first
566 instrumented function.
569 *** New minor mode `global-eldoc-mode'
570 *** `eldoc-documentation-function' now defaults to `ignore'
571 *** `describe-char-eldoc' displays information about character at point,
572 and can be used as a default value of `eldoc-documentation-function'. It is
573 useful when, for example, one needs to distinguish various spaces (e.g. ] [,
574 ] [, ] [, etc.) while using mono-spaced font.
579 *** HTML can now be rendered using variable-width fonts.
582 *** A new command `F' (`eww-toggle-fonts') can be used to toggle
583 whether to use variable-pitch fonts or not. The user can also
584 customize the `shr-use-fonts' variable.
587 *** A new command `R' (`eww-readable') will try do identify the main
588 textual parts of a web page and display only that, leaving menus and
589 the like off the page.
592 *** You can now use several eww buffers in parallel by renaming eww
593 buffers you want to keep separate.
596 *** Partial state of the eww buffers (the URIs and the titles of the
597 pages visited) is now preserved in the desktop file.
600 *** `eww-after-render-hook' is now called after eww has rendered
601 the data in the buffer.
604 *** The `eww-reload' command now takes a prefix to not reload via
605 the net, but just use the local copy of the HTML.
608 *** The DOM shr and eww uses has been changed to the general Emacs
609 xml.el/libxml2 DOM, and a new package dom.el has been added to
610 interact with this DOM. See the Emacs Lisp manual for interface
614 *** `mailcap-mime-data' is now consulted when displaying PDF files.
617 *** The new `S' command will list all eww buffers, and allow managing
621 *** https pages with valid certificates have headers marked in green, while
622 invalid certificates are marked in red.
626 *** text/html messages that contain inline image parts will be
627 transformed into multipart/related messages before sending.
630 *** New UPatterns `quote', `app', `cl-struct', and `eieio'.
631 *** New UPatterns can be defined with `pcase-defmacro'.
633 *** New vector QPattern.
636 *** Strings after `:documentation' are highlighted as docstrings.
639 *** Rectangle Mark mode can have corners past EOL or in the middle of a TAB.
640 *** C-x C-x in rectangle-mark-mode now cycles through the four corners.
641 *** `string-rectangle' provides on-the-fly preview of the result.
643 ** New font-lock functions font-lock-ensure and font-lock-flush, which
644 should be used instead of font-lock-fontify-buffer when called from Elisp.
646 ** Macro `minibuffer-with-setup-hook' takes (:append FUN) to mean
647 appending FUN to `minibuffer-setup-hook'.
650 *** New functions cl-fresh-line, cl-digit-char-p and cl-parse-integer.
652 ** Calendar and diary
655 *** The default `diary-file' is now located in .emacs.d.
658 *** New commands to insert diary entries with Chinese dates:
659 `diary-chinese-insert-anniversary-entry' `diary-chinese-insert-entry'
660 `diary-chinese-insert-monthly-entry', `diary-chinese-insert-yearly-entry'.
663 *** The calendar can now list and mark diary entries with Chinese dates.
664 See `diary-chinese-list-entries' and `diary-chinese-mark-entries'.
667 *** The option `calendar-mode-line-format' can now be nil,
668 which means to do nothing special with the mode line in calendars.
671 *** New option `calendar-weekend-days'.
672 The option customizes which day headers receive the
673 `calendar-weekend-header' face.
676 *** New optional args N and STRING for ‘holiday-greek-orthodox-easter’.
679 *** Many items obsolete since at least version 23.1 have been removed.
680 The majority were function/variable/face aliases, too numerous to list here.
683 **** Functions `calendar-one-frame-setup', `calendar-only-one-frame-setup',
684 `calendar-two-frame-setup', `european-calendar', `american-calendar'.
686 **** Hooks `cal-menu-load-hook', `cal-x-load-hook'.
688 **** Macro `calendar-for-loop'.
690 **** Variables `european-calendar-style', `diary-face', `hebrew-holidays-{1,4}'.
692 **** The nil and list forms of `diary-display-function'.
694 ** New ERT function `ert-summarize-tests-batch-and-exit'.
696 ** New js.el option `js-indent-first-init'.
699 ** `Info-fontify-maximum-menu-size' can be t for no limit.
702 ** `info-display-manual' can now be given a prefix argument which (any
703 non-nil value) directs the command to limit the completion
704 alternatives to currently visited manuals.
707 ** ntlm.el has support for NTLM2.
711 *** The Rmail commands d, C-d and u take optional repeat counts to delete or
712 undelete multiple messages.
714 *** Rmail can now render HTML mail messages if your Emacs was built with
715 libxml2 or if you have the Lynx browser installed. By default, Rmail
716 will display the HTML version of a mail message that has both HTML and
717 plain text parts, if display of HTML email is possible; customize the
718 `rmail-mime-prefer-html' option to `nil' if you don't want that.
721 *** In the commands that make summaries by subject, recipients, or senders,
722 you can no longer use commas to separate regular expressions.
724 ** SES now supports local printer functions; see `ses-define-local-printer'.
727 *** In sh-mode you can now use `sh-shell' as a file-local variable to
728 specify the type of shell in use (bash, csh, etc).
730 *** New value `always' for sh-indent-after-continuation.
731 This provides old-style ("dumb") indentation of continued lines.
735 *** Fatal TLS errors are now silent by default.
739 *** The URL package accepts now the protocols "ssh", "scp" and "rsync".
740 When `url-handler-mode' is enabled, file operations for these
741 protocols as well as for "telnet" and "ftp" are passed to Tramp.
743 *** The URL package allows customizing the `url-user-agent' string.
744 The new `url-user-agent' variable can be customized to be a string or
747 *** The new interface variable `url-request-noninteractive' can be used
748 to specify that we're running in a noninteractive context, and that
749 we should not be queried about things like TLS certificate validity.
751 *** If URL is used with a https connection, the first callback argument
752 plist will contain a :peer element that has the output of
753 `gnutls-peer-status' (if Emacs is built with GnuTLS support).
758 *** New connection method "afp", which allows to access Mac OS X
759 volumes via the Apple Filing Protocol.
762 *** New connection method "nc", which allows to access dumb busyboxes.
765 *** Method-specific parameters can be overwritten now with variable
766 `tramp-connection-properties'.
769 *** Handler for `file-notify-valid-p' for remote machines that support
770 filesystem notifications.
774 *** New user variable `sql-default-directory' enables remote
775 connections using Tramp.
777 *** New command `sql-send-line-and-next' sends the current line to the
778 interactive buffer and advances to the next line, skipping whitespace
781 *** Add support for Vertica SQL.
783 ** VC and related modes
785 *** Basic push support, via `vc-push', bound to `C-x v P'.
786 Implemented for Bzr, Git, Hg. As part of this change, the pre-existing
787 (undocumented) command vc-hg-push now behaves slightly differently.
789 *** The new command vc-region-history shows the log+diff of the active region.
791 *** New option `vc-annotate-background-mode' controls whether
792 the color range from `vc-annotate-color-map' is applied to the
793 background or to the foreground.
795 *** `compare-windows' now compares text with the most recently used window
796 instead of the next window. The new option `compare-windows-get-window-function'
797 allows to customize this.
799 *** Two new faces `compare-windows-removed' and `compare-windows-added'
800 replace the obsolete face `compare-windows'.
803 *** `log-edit-insert-changelog' converts "(tiny change)" to
804 "Copyright-paperwork-exempt: yes". Set `log-edit-rewrite-tiny-change'
807 ** VHDL mode supports VHDL'08.
809 ** Calculator: decimal display mode uses "," groups, so it's more
810 fitting for use in money calculations; factorial works with
813 ** HideIfDef mode now support full C/C++ expressions, argumented macro expansions,
814 interactive macro evaluation and automatic scanning of #defined symbols.
816 *** New custom variable `hide-ifdef-header-regexp' to define C/C++ header file
817 name patterns. Default case-insensitive .h, .hh, .hpp, .hxx, and .h++.
818 *** New custom variable `hide-ifdef-expand-reinclusion-protection' to prevent
819 reinclusion protected header files from being fully hidden.
820 *** New custom variable `hide-ifdef-exclude-define-regexp' to define symbol
821 name patterns (e.g. all "FOR_DOXYGEN_ONLY_*") to be excluded.
825 *** New custom variable `tex-print-file-extension' to help users who
826 use PDF instead of DVI.
828 *** TeX mode now supports Prettify Symbols mode. When enabling
829 `prettify-symbols-mode' in a tex-mode buffer, \alpha ... \omega, and
830 many other math macros are displayed using unicode characters.
832 ** whitespace-mode: new 'big-indent style highlighting too much indentation.
833 By default, 32 spaces and four TABs are considered to be too much but
834 `whitespace-big-indent-regexp' can be configured to change that.
836 ** tildify: `tildify-space-string', `tildify-pattern', and
837 `tildify-foreach-region-function' variables added making
838 `tildify-string-alist', `tildify-pattern-alist', and
839 `tildify-ignored-environments-alist' variables (as well as a few
840 helper functions) obsolete.
843 The new package provides generic framework and new commands to find
844 and move to definitions, as well as pop back to the original location.
847 `xref-find-definitions' replaces `find-tag' and provides an interface
848 to pick one destination among several. Hence, `tags-loop-continue' is
849 unbound. `xref-pop-marker-stack' replaces `pop-tag-mark', but uses an
850 easier binding, which is now unoccupied (`M-,').
851 `xref-find-definitions-other-window' replaces `find-tag-other-window'.
852 `xref-find-definitions-other-frame' replaces `find-tag-other-frame'.
853 `xref-find-apropos' replaces `find-tag-regexp'.
856 `find-tag-marker-ring-length' is now an obsolete alias for
857 `xref-marker-ring-length'. `find-tag-marker-ring' is now an obsolete
858 alias for a private variable. `xref-push-marker-stack' and
859 `xref-pop-marker-stack' should be used to mutate it instead.
862 As a result of the above, these commands are now obsolete:
863 `find-tag-other-window', `find-tag-other-frame', `find-tag-regexp',
864 `tags-apropos' and `tags-loop-continue'.
867 EUDC's LDAP backend has been improved.
869 *** EUDC supports LDAP-over-SSL URLs (ldaps://).
871 *** EUDC passes LDAP passwords through a pipe to the ldapsearch
872 subprocess instead of on the command line.
874 *** EUDC handles LDAP wildcards automatically so the user shouldn't
875 need to configure this manually anymore.
877 *** The LDAP configuration section of EUDC's manual has been
880 There have also been customization changes.
882 *** New custom variable `eudc-server-hotlist' to allow specifying
883 multiple EUDC servers in init file.
885 *** Custom variable `eudc-inline-query-format' defaults to completing
886 on email and firstname instead of surname.
888 *** Custom variable `eudc-expansion-overwrites-query' defaults to nil
889 to avoid interfering with the kill ring.
891 *** Custom variable `eudc-inline-expansion-format' defaults to
892 "Firstname Surname <mail-address>".
894 *** Custom variable `eudc-options-file' defaults to
895 "~/.emacs.d/eudc-options".
897 *** New custom variable `ldap-ldapsearch-password-prompt-regexp' to
898 allow overriding the regular expression that recognizes the ldapsearch
899 command line's password prompt.
901 EUDC's BBDB backend now supports BBDB 3.
906 *** The new built-in command `clear' can scroll window contents out of sight.
907 If provided with an optional non-nil argument, the scrollback contents will be cleared.
909 *** New buffer syntax '#<buffer-name>', which is equivalent to
910 '#<buffer buffer-name>'. This shorthand makes interacting with
911 buffers from eshell more convenient. Custom variable
912 `eshell-buffer-shorthand', which has been broken for a while, has been
915 *** By default, eshell "visual" program buffers (created by
916 `eshell-visual-commands' and similar custom vars) are no longer killed
917 when their processes die. This fixes issues with short-lived commands
918 and makes visual programs more useful in general. For example, if
919 "git log" is a visual command, it will always show the visual command
920 buffer, even if the "git log" process dies. For the old behavior,
921 make the new option `eshell-destroy-buffer-when-process-dies' non-nil.
925 *** Support for the Conkeror web browser.
928 *** Support for several ancient browsers is now officially obsolete.
931 ** tar-mode: new `tar-new-entry' command, allowing for new members to
932 be added to the archive.
935 ** Autorevert: dired buffers are also auto-reverted via file
936 notifications, if Emacs is compiled with file notification support.
938 ** File Notifications
941 *** The new event `stopped' signals, that a file notification watch is
942 not active any longer.
945 *** The new function `file-notify-valid-p' checks, whether a file
946 notification descriptor still corresponds to an activate watch.
951 *** The command `dired-do-compress' bound to `Z' now can compress
952 directories and decompress zip files.
955 *** New command `dired-do-compress-to' bound to `c' can be used to
956 compress many marked files into a single named archive. The
957 compression command is determined from the new
958 `dired-compress-files-alist' variable.
965 *** landmark.el (moved to elpa.gnu.org)
968 * New Modes and Packages in Emacs 25.1
970 ** pinentry.el allows GnuPG passphrase to be prompted through the
971 minibuffer instead of a graphical dialog, depending on whether the gpg
972 command is called from Emacs (i.e., INSIDE_EMACS environment variable
973 is set). This feature requires newer versions of GnuPG (2.1.5 or
974 later) and Pinentry (0.9.5 or later).
976 ** cl-generic.el provides CLOS-style multiple-dispatch generic functions.
978 ** scss-mode (a minor variant of css-mode)
980 ** let-alist is a new macro (and a package) that allows one to easily
981 let-bind the values stored in an alist.
983 ** `tildify-mode' allows to automatically insert hard spaces as one
984 types the text. Breaking line after a single-character words is
985 forbidden by Czech and Polish typography (and may be discouraged in
986 other languages), so `auto-tildify-mode' makes it easier to create
987 a typographically-correct documents.
989 ** The `seq' library adds sequence manipulation functions and macros
990 that complement basic functions provided by subr.el. All functions
991 are prefixed with `seq-' and work on lists, strings and vectors.
993 ** The `map' library provides map-manipulation functions that work on
994 alists, hash-table and arrays. All functions are prefixed with
997 ** The `thunk' library provides functions and macros to control the
1000 ** js-jsx-mode (a minor variant of js-mode) provides indentation
1001 support for JSX, an XML-like syntax extension to ECMAScript.
1004 * Incompatible Lisp Changes in Emacs 25.1
1007 ** `setq' and `setf' must now be called with an even number of
1008 arguments. The earlier behavior of silently supplying a nil to the
1009 last variable when there was an odd number of arguments has been
1012 ** `syntax-begin-function' is declared obsolete.
1013 Removed font-lock-beginning-of-syntax-function and the SYNTAX-BEGIN
1014 slot in font-lock-defaults.
1017 ** `package-initialize' now sets `package-enable-at-startup' to nil if
1018 called during startup. Users who call this function in their init
1019 file and still expect it to be run after startup should set
1020 `package-enable-at-startup' to t after the call to
1021 `package-initialize'.
1023 ** `:global' minor mode use `setq-default' rather than `setq'.
1024 This means that you can't use `make-local-variable' and expect them to
1025 "magically" become buffer-local.
1027 ** `inhibit-point-motion-hooks' now defaults to t and is obsolete.
1030 ** `track-mouse' no longer freezes the shape of the mouse pointer.
1031 The `track-mouse' form no longer refrains from changing the shape of
1032 the mouse pointer for the entire time the body of that form is
1033 executed. Lisp programs that use `track-mouse' for dragging across
1034 large portions of the Emacs display, and want to avoid changes in the
1035 pointer shape during dragging, should bind the variable `track-mouse'
1036 to the special value `dragging' in the body of the form.
1038 ** The optional `predicate' argument of `lisp-complete-symbol' no longer
1039 has any effect. (This change was made in Emacs 24.4 but was not
1040 advertised at the time.)
1042 ** `indirect-function' does not signal `void-function' any more.
1043 This is mostly a bug-fix, since this change was missed back in 24.4 when
1044 symbol-function was changed not to signal `void-function' any more.
1045 *** As a consequence, the second arg of `indirect-function' is now obsolete.
1047 ** Comint, term, and compile do not set the EMACS env var any more.
1048 Use the INSIDE_EMACS environment variable instead.
1050 ** `save-excursion' does not save&restore the mark any more.
1052 ** read-buffer-function can now be called with a 4th argument (`predicate').
1054 ** completion-table-dynamic stays in the minibuffer.
1055 If you want the old behavior of calling the function in the buffer
1056 from which the minibuffer was entered, call it with the new argument
1059 ** window-configurations no longer record the buffers' marks.
1061 ** inhibit-modification-hooks now also inhibits lock-file checks, as well as
1062 active region handling.
1064 ** deactivate-mark is now buffer-local.
1066 ** `cl-the' now asserts that its argument is of the given type.
1068 ** `process-running-child-p` may now return a numeric process
1069 group ID instead of `t'.
1072 ** Mouse click events on mode line or header line no longer include
1073 any reference to a buffer position. The 6th member of the mouse
1074 position list returned for such events is now nil.
1076 ** Menu items in keymaps do not support the "key shortcut cache" any more.
1077 These slots used to hold key-shortcut data, but have been obsolete since
1080 ** Emacs no longer downcases the first letter of a system diagnostic
1081 when signaling a file error. For example, it now reports "Permission
1082 denied" instead of "permission denied". The old behavior was problematic
1083 in languages like German where downcasing rules depend on grammar.
1086 ** New variable ‘text-quoting-style’ to control how Emacs translates quotes.
1087 Set it to ‘curve’ for curved single quotes ‘like this’, to ‘straight’
1088 for straight apostrophes 'like this', and to ‘grave’ for grave accent
1089 and apostrophe `like this'. The default value nil acts like ‘curve’
1090 if curved single quotes are displayable, and like ‘grave’ otherwise.
1091 The new variable affects display of diagnostics and help, but not of info.
1094 ** substitute-command-keys now replaces quotes.
1095 That is, it converts documentation strings’ quoting style as per the
1096 value of ‘text-quoting-style’. Doc strings in source code can use
1097 either curved single quotes or grave accents and apostrophes. As
1098 before, characters preceded by \= are output as-is.
1101 ** Message-issuing functions ‘error’, ‘message’, etc. now convert quotes.
1102 They use the new ‘format-message’ function instead of plain ‘format’,
1103 so that they now follow user preference as per ‘text-quoting-style’
1104 when processing curved single quotes, grave accents, and apostrophes
1105 in their format argument.
1108 ** The character classes [:alpha:] and [:alnum:] in regular expressions
1109 now match multibyte characters using Unicode character properties.
1110 If you want the old behavior where they matched any character with
1111 word syntax, use `\sw' instead.
1114 ** The character classes [:graph:] and [:print:] in regular expressions
1115 no longer match every multibyte character. Instead, Emacs now
1116 consults the Unicode character properties to determine which
1117 characters are graphic or printable. In particular, surrogates and
1118 unassigned codepoints are now rejected. If you want the old behavior,
1119 use [:multibyte:] instead.
1122 ** The `diff' command uses the unified format now. To restore the old
1123 behavior, set `diff-switches' to `-c'.
1125 ** `grep-template' and `grep-find-template' values don't include the
1126 --color argument anymore. It's added at the <C> place holder position
1127 dynamically. Any third-party code that changes these templates should
1128 be updated accordingly.
1131 ** ‘(/ N)’ is now equivalent to ‘(/ 1 N)’ rather than to ‘(/ N 1)’.
1132 The new behavior is compatible with Common Lisp and with XEmacs.
1133 This change does not affect Lisp code intended to be portable to
1134 Emacs 24.2 and earlier, which did not support unary ‘/’.
1137 ** The `default-directory' value doesn't have to end slash. To make
1138 that happen, `unhandled-file-name-directory' now defaults to calling
1139 `file-name-as-directory'.
1142 * Lisp Changes in Emacs 25.1
1144 ** syntax-propertize is now automatically called on-demand during forward
1145 parsing functions like `forward-sexp'.
1147 ** New hooks prefix-command-echo-keystrokes-functions and
1148 prefix-command-preserve-state-hook, to allow the definition of prefix
1149 commands other than the predefined C-u.
1151 ** New functions `filepos-to-bufferpos' and `bufferpos-to-filepos'.
1153 ** The default value of `load-read-function' is now `read'.
1155 ** New hook `pre-redisplay-functions', a bit easier to use than pre-redisplay-function.
1157 ** The second arg of `looking-back' should always be provided explicitly.
1159 ** Obsolete text properties `intangible', `point-entered', and `point-left'.
1160 Replaced by properties `cursor-intangible' and `cursor-sensor-functions',
1161 implemented by the new `cursor-intangible-mode' and
1162 `cursor-sensor-mode' minor modes.
1164 ** New process type `pipe', which can be used in combination with the
1165 `:stderr' keyword of make-process to handle standard error output
1168 ** New function `make-process' provides an alternative interface to
1169 `start-process'. It allows programs to set process parameters such as
1170 process filter, sentinel, etc., through keyword arguments (similar to
1171 `make-network-process').
1173 ** `read-buffer' takes a new `predicate' argument.
1175 ** Emacs Lisp now supports generators.
1177 ** New finalizer facility for running code when objects
1180 ** lexical closures can use (:documentation <form>) to build their docstring.
1181 It should be placed right where the docstring would be, and <form> is then
1182 evaluated (and should return a string) when the closure is built.
1184 ** define-inline provides a new way to define inlinable functions.
1186 ** New function `macroexpand-1' to perform a single step of macroexpansion.
1188 ** Some "x-*" were obsoleted:
1189 *** x-select-text is renamed gui-select-text.
1190 *** x-selection-value is renamed gui-selection-value.
1191 *** x-get-selection is renamed gui-get-selection.
1192 *** x-get-clipboard and x-clipboard-yank are marked obsolete.
1193 *** x-get-selection-value is renamed to gui-get-primary-selection.
1194 *** x-set-selection is renamed to gui-set-selection
1196 ** New function `string-greaterp', which return the opposite result of
1199 ** New function `alist-get', which is also a valid place (aka lvalue).
1201 ** New function `funcall-interactively', which works like `funcall'
1202 but makes `called-interactively-p' treat the function as (you guessed it)
1203 called interactively.
1205 ** New function `function-put' to use instead of `put' for function properties.
1208 ** New properties that can be specified with `declare':
1209 *** (interactive-only INSTEAD), says to use INSTEAD for non-interactive use.
1210 *** (pure VAL), if VAL is non-nil, indicates the function is pure.
1211 *** (side-effect-free VAL), if VAL is non-nil, indicates the function does not
1215 ** New macro `with-file-modes', for evaluating expressions with default file
1216 permissions set to temporary values (e.g., for creating private files).
1218 ** You can access the slots of structures using `cl-struct-slot-value'.
1220 ** Function `sort' can deal with vectors.
1222 ** Function `system-name' now returns an updated value if the current
1223 system's name has changed or if the Emacs process has changed systems,
1224 and to avoid long waits it no longer consults DNS to canonicalize the
1225 name. The variable `system-name' is now obsolete.
1228 ** Function `write-region' no longer outputs "Wrote FILE" in batch mode.
1230 ** If `pwd' is called with a prefix argument, insert the current default
1234 ** New utilities in subr-x.el:
1235 *** New macros `if-let' and `when-let' allow defining bindings and to
1236 execute code depending whether all values are true.
1237 *** New macros `thread-first' and `thread-last' allow threading a form
1238 as the first or last argument of subsequent forms.
1241 ** Documentation strings now support quoting with curved single quotes
1242 ‘like-this’ in addition to the old style with grave accent and
1243 apostrophe `like-this'. The new style looks better on today's displays.
1244 In the new Electric Quote mode, you can enter curved single quotes
1245 into documentation by typing ` and '. Outside Electric Quote mode,
1246 you can enter them by typing ‘C-x 8 [’ and ‘C-x 8 ]’, or (if your Alt
1247 key works) by typing ‘A-[’ and ‘A-]’. As described above under
1248 ‘text-quoting-style’, the user can specify how to display doc string
1252 ** New function ‘format-message’ is like ‘format’ and also converts
1253 curved single quotes, grave accents and apostrophes as per
1254 ‘text-quoting-style’.
1257 ** show-help-function's arg is converted via substitute-command-keys
1258 before being passed to the function. Help strings, help-echo
1259 properties, etc. can therefore contain command key escapes and
1263 ** Time-related changes:
1265 *** Time conversion functions now accept an optional ZONE argument
1266 that specifies the time zone rules for conversion. ZONE is omitted or
1267 nil for Emacs local time, t for Universal Time, ‘wall’ for system wall
1268 clock time, or a string as in ‘set-time-zone-rule’ for a time zone
1269 rule. The affected functions are ‘current-time-string’,
1270 ‘current-time-zone’, ‘decode-time’, and ‘format-time-string’. The
1271 function ‘encode-time’, which already accepted a simple time zone rule
1272 argument, has been extended to accept all the new forms.
1274 *** Time-related functions now consistently accept numbers
1275 (representing seconds since the epoch) and nil (representing the
1276 current time) as well as the usual list-of-integer representation.
1277 Affected functions include `current-time-string', `current-time-zone',
1278 `decode-time', `float-time', `format-time-string', `seconds-to-time',
1279 `time-add', `time-less-p', `time-subtract', `time-to-day-in-year',
1280 `time-to-days', and `time-to-seconds'.
1282 *** The `encode-time-value' and `with-decoded-time-value' macros have
1285 *** `calendar-next-time-zone-transition', `time-add', and
1286 `time-subtract' no longer return time values in the obsolete and
1287 undocumented integer-pair format. Instead, they return a list of two
1291 ** New function `set-binary-mode' allows to switch a standard stream
1292 of the Emacs process to binary I/O mode.
1294 ** ASCII approximations to curved quotes are put in standard-display-table
1295 if the terminal cannot display curved quotes.
1297 ** Standard output and error streams now transliterate characters via
1298 standard-display-table, and encode output using locale-coding-system.
1300 ** Miscellaneous name change
1302 For consistency with the usual Emacs spelling, the Lisp variable
1303 `hfy-optimisations' has been renamed to `hfy-optimizations'.
1304 The old name should still work, as an obsolescent alias.
1307 * Changes in Frames and Windows Code in Emacs 25.1
1310 ** Emacs can now draw horizontal scroll bars on some platforms that
1311 provide toolkit scroll bars, namely Gtk+, Lucid, Motif and Windows.
1312 Horizontal scroll bars are turned off by default.
1313 *** New function `horizontal-scroll-bars-available-p' telling whether
1314 horizontal scroll bars are available on the underlying system.
1315 *** New mode `horizontal-scroll-bar-mode' to toggle horizontal scroll
1316 bars on all existing and future frames.
1317 *** New function `toggle-horizontal-scroll-bar' to toggle horizontal
1318 scroll bars on the selected frame.
1319 *** New frame parameters `horizontal-scroll-bars' and
1320 `scroll-bar-height' to set horizontal scroll bars and their height
1321 for individual frames and in `default-frame-alist'.
1322 *** New functions `frame-scroll-bar-height' and
1323 `window-scroll-bar-height' return the height of horizontal scroll
1324 bars on a specific frame or window.
1325 *** `set-window-scroll-bars' now accepts five parameters where the last
1326 two specify height and type of the window's horizontal scroll bar.
1327 *** `window-scroll-bars' now returns type and sizes of horizontal scroll
1329 *** New buffer-local variables `horizontal-scroll-bar' and
1330 `scroll-bar-height'.
1333 ** New functions `frame-geometry' and `frame-edges' give access to a
1337 ** New functions `mouse-absolute-pixel-position' and
1338 `set-mouse-absolute-pixel-position' get/set screen coordinates of the
1342 ** The function `window-edges' now accepts three additional arguments to
1343 retrieve body, absolute and pixel edges of the window.
1346 ** The functions `window-inside-edges', `window-inside-pixel-edges' and
1347 `window-inside-absolute-pixel-edges' have been renamed to respectively
1348 `window-body-edges', `window-body-pixel-edges' and
1349 `window-absolute-body-pixel-edges'. The old names are kept as aliases.
1352 ** New function `window-absolute-pixel-position' to get the screen
1353 coordinates of a visible buffer position.
1356 ** The height of a frame's menu and tool bar are no longer counted in the
1357 frame's text height. This means that the text height stands only for
1358 the height of the frame's root window plus that of the echo area (if
1359 present). This was already the behavior for frames with external tool
1360 and menu bars (like in the Gtk builds) but has now been extended to all
1364 ** Frames now do not necessarily preserve the number of columns or lines
1365 they display when setting default font, menu bar, fringe width, or
1366 scroll bars. In particular, maximized and fullscreen frames are
1367 conceptually never resized if such settings change. For fullheight and
1368 fullwidth frames, the behavior may depend on the toolkit used.
1369 *** New option `frame-inhibit-implied-resize' if non-nil, means that
1370 setting default font, menu bar, fringe width, or scroll bars of a
1371 specific frame does not resize that frame in order to preserve the
1372 number of columns or lines it displays.
1375 ** New function `window-preserve-size' allows to preserve the size of
1376 windows without "fixing" it. It's supported by `fit-window-to-buffer',
1377 `temp-buffer-resize-mode' and `display-buffer'.
1380 ** New minor mode `window-divider-mode' and options
1381 `window-divider-default-places', `window-divider-default-bottom-width'
1382 and `window-divider-default-right-width'.
1385 ** New option `switch-to-buffer-in-dedicated-window' allows to customize
1386 how `switch-to-buffer' proceeds interactively when the selected window
1387 is strongly dedicated to its buffer.
1390 ** The option `even-window-heights' has been renamed to
1391 `even-window-sizes' and now handles window widths as well.
1393 ** Tearoff menus and detachable toolbars for Gtk+ has been removed.
1394 Those features have been deprecated in Gtk+ for a long time.
1398 *** etags no longer qualifies class members by default.
1399 By default, `etags' will not qualify class members for C-like
1400 object-oriented languages with their class names and namespaces, and
1401 will remove qualifications used explicitly in the code from the tag
1402 names it puts in TAGS files. This is so the etags.el back-end for
1403 `xref-find-definitions' is more accurate and produces less false
1406 Use --class-qualify (-Q) if you want the old default behavior of
1407 qualifying class members in C++, Java, and Objective C. Note that
1408 using -Q might make some class members become "unknown" to `M-.'
1409 (`xref-find-definitions'); if so, you can use `C-u M-.' to specify the
1410 qualified names by hand.
1413 * Changes in Emacs 25.1 on Non-Free Operating Systems
1416 ** MS-Windows specific Emacs build scripts are no longer in the distribution
1417 This includes the makefile.w32-in files in various subdirectories, and
1418 the support files. The file nt/configure.bat now just tells the user
1419 to use the procedure described in nt/INSTALL, by running the Posix
1420 `configure' script in the top-level directory.
1423 ** Building Emacs for MS-Windows requires at least Windows XP
1424 or Windows Server 2003. The built binaries still run on all versions
1425 of Windows starting with Windows 9X.
1428 ** Emacs running on MS-Windows now supports the daemon mode.
1430 ** The byte counts in etags-generated TAGS files are now the same on
1431 MS-Windows as they are on other platforms.
1434 ** On OS X, configure creates a Cocoa ("Nextstep") build by default.
1435 Pass '--without-ns' to configure to create an X11 build, the old default.
1437 ** OS X 10.5 or older is no longer supported.
1439 ** OS X on PowerPC is no longer supported.
1442 ** The new function 'w32-application-type' returns the type of an
1443 MS-Windows application given the name of its executable program file.
1446 ----------------------------------------------------------------------
1447 This file is part of GNU Emacs.
1449 GNU Emacs is free software: you can redistribute it and/or modify
1450 it under the terms of the GNU General Public License as published by
1451 the Free Software Foundation, either version 3 of the License, or
1452 (at your option) any later version.
1454 GNU Emacs is distributed in the hope that it will be useful,
1455 but WITHOUT ANY WARRANTY; without even the implied warranty of
1456 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1457 GNU General Public License for more details.
1459 You should have received a copy of the GNU General Public License
1460 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
1466 paragraph-separate: "[
\f]*$"