1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2014-2016 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 25.2
29 ** New configure option '--disable-build-details' attempts to build an
30 Emacs that is more likely to be reproducible; that is, if you build
31 and install Emacs twice, the second Emacs is a copy of the first.
32 Deterministic builds omit the build date from the output of the
33 emacs-version and erc-cmd-SV functions, and the leave the following
34 variables nil: emacs-build-system, emacs-build-time,
37 ** Emacs no longer works on IRIX. We expect that Emacs users are not
38 affected by this, as SGI stopped supporting IRIX in December 2013.
41 * Startup Changes in Emacs 25.2
44 * Changes in Emacs 25.2
47 ** A number of accessors for the value returned by 'file-attributes'
48 has been added. They are: 'file-attribute-type',
49 'file-attribute-link-number', 'file-attribute-user-id',
50 'file-attribute-group-id', 'file-attribute-access-time',
51 'file-attribute-modification-time',
52 'file-attribute-status-change-time', 'file-attribute-size',
53 'file-attribute-modes', 'file-attribute-inode-number', and
54 'file-attribute-device-number'
57 ** The new function 'buffer-hash' has been added, and can be used to
58 compute a fash, non-consing hash of the contents of a buffer.
61 ** The grep mode now has a command history that you can access via the
65 ** 'fill-paragraph' no longer marks the buffer as changed unless it
66 actually changed something.
69 ** The locale language name 'ca' is now mapped to the language
70 environment 'Catalan', which has been added.
73 ** 'align-regexp' has a separate history for its interactive argument
74 'align-regexp' no longer shares its history with all other
75 history-less functions that use 'read-string'
78 ** The networking code has been reworked so that it's more
79 asynchronous than it was (when specifying :nowait t in
80 'make-network-process'). How asynchronous it is varies based on the
81 capabilities of the system, but on a typical GNU/Linux system the DNS
82 resolution, the connection, and (for TLS streams) the TLS negotiation
83 are all done without blocking the main Emacs thread. To get
84 asynchronous TLS, the TLS boot parameters have to be passed in (see
85 the manual for details).
87 Certain process oriented functions (like 'process-datagram-address')
88 will block until socket setup has been performed. The recommended way
89 to deal with asynchronous sockets is to avoid interacting with them
90 until they have changed status to "run". This is most easily done
91 from a process sentinel.
93 ** 'make-network-process' and 'open-network-stream' sometimes allowed
94 :service to be an integer string (e.g., :service "993") and sometimes
95 required an integer (e.g., :service 993). This difference has been
96 eliminated, and integer strings work everywhere.
98 ** It is possible to disable attempted recovery on fatal signals
100 Two new variables allow to disable attempts to recover from stack
101 overflow and to avoid automatic auto-save when Emacs is delivered a
102 fatal signal. 'attempt-stack-overflow-recovery', if set to 'nil',
103 will disable attempts to recover from C stack overflows; Emacs will
104 then crash as with any other fatal signal.
105 'attempt-orderly-shutdown-on-fatal-signal', if set to 'nil', will
106 disable attempts to auto-save the session and shut down in an orderly
107 fashion when Emacs receives a fatal signal; instead, Emacs will
108 terminate immediately. Both variables are non-'nil' by default.
109 These variables are for users who would like to avoid the small
110 probability of data corruption due to techniques Emacs uses to recover
114 * Editing Changes in Emacs 25.2
117 * Changes in Specialized Modes and Packages in Emacs 25.2
122 *** A new 's' command for switching to another eww buffer via the minibuffer.
125 *** The 'o' command ('shr-save-contents') has moved to 'O' to avoid collision
126 with the 'o' command from 'image-map'.
129 ** The commands that add ChangeLog entries now prefer a VCS root directory
130 for the ChangeLog file, if none already exists. Customize
131 'change-log-directory-files' to nil for the old behavior.
134 ** Support for non-string values of 'time-stamp-format' has been removed.
139 *** New connection method "sg", which allows to edit files under
143 *** New connection method "doas" for OpenBSD hosts.
146 ** 'auto-revert-use-notify' is set back to t in 'global-auto-revert-mode'.
151 *** Support for completing attribute values and bang-rules using the
152 'completion-at-point' command.
155 * New Modes and Packages in Emacs 25.2
158 * Incompatible Lisp Changes in Emacs 25.2
161 ** Resizing a frame no longer runs 'window-configuration-change-hook'.
162 Put your function on 'window-size-change-functions' instead.
165 * Lisp Changes in Emacs 25.2
167 ** New var syntax-ppss-table to control the syntax-table used in syntax-ppss
169 ** Autoload files can be generated without timestamps,
170 by setting 'autoload-timestamps' to nil.
171 FIXME As an experiment, nil is the current default.
172 If no insurmountable problems before next release, it can stay that way.
174 ** 'ert-with-function-mocked' of 'ert-x package allows mocking of functions
178 ** 'gnutls-boot' now takes a parameter :complete-negotiation that says
179 that negotiation should complete even on non-blocking sockets.
182 ** New functions 'window-pixel-width-before-size-change' and
183 'window-pixel-height-before-size-change' allow to detect which window
184 changed size when 'window-size-change-functions' are run.
187 ** New function 'display-buffer-reuse-mode-window' is an action function
188 suitable for use in 'display-buffer-alist'. For example, to avoid creating
189 a new window when opening man pages when there's already one, use
190 (add-to-list 'display-buffer-alist
191 '("\\`\\*Man .*\\*\\'" .
192 (display-buffer-reuse-mode-window
193 (inhibit-same-window . nil)
197 ** New function 'func-arity' returns information about the argument list
198 of an arbitrary function.
199 This is a generalization of 'subr-arity' for functions that are not
200 built-in primitives. We recommend using this new function instead of
204 ** 'parse-partial-sexp' state has a new element. Element 10 is
205 non-nil when the last character scanned might be the first character
206 of a two character construct, i.e. a comment delimiter or escaped
207 character. Its value is the syntax of that last character.
210 ** 'parse-partial-sexp''s state, element 9, has now been confirmed as
211 permanent and documented, and may be used by Lisp programs. Its value
212 is a list of currently open parenthesis positions, starting with the
213 outermost parenthesis.
216 * Changes in Emacs 25.2 on Non-Free Operating Systems
218 ** Intercepting hotkeys on Windows 7 and later now works better.
219 The new keyboard hooking code properly grabs system hotkeys such as
220 Win-* and Alt-TAB, in a way that Emacs can get at them before the
221 system. This makes the 'w32-register-hot-key' functionality work
222 again on all versions of MS-Windows starting with Windows 7. On
223 Windows NT and later you can now register any hotkey combination. (On
224 Windows 9X, the previous limitations, spelled out in the Emacs manual,
228 * Installation Changes in Emacs 25.1
231 ** Building Emacs now requires C99 or later.
234 ** Building Emacs now requires GNU make, version 3.81 or later.
237 ** New configure option --with-cairo.
238 This builds Emacs with Cairo drawing. As a side effect, it provides
239 support for built-in printing, when Emacs was built with GTK+.
240 Cairo drawing is an experimental feature in Emacs, and subject to
241 change in future releases.
244 ** New configure option --with-modules.
245 This enables support for loading dynamic modules; see below.
248 ** By default, Emacs no longer works on IRIX. We expect that Emacs
249 users are not affected by this, as SGI stopped supporting IRIX in
250 December 2013. If you are affected, please send a bug report. You
251 should be able to work around the problem either by porting the Emacs
252 undumping code to GCC under IRIX, or by configuring --with-wide-int,
253 or by sticking with Emacs 24.4.
256 ** The Emacs garbage collector assumes GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS.
257 The GC_MAKE_GCPROS_NOOPS stack-marking variant has been the default
258 since Emacs 24.4, and the other variants were undocumented and were
259 obstacles to maintenance and development. GC_MARK_STACK and its
260 related symbols have been removed from the C internals.
263 ** 'configure' now prefers gnustep-config when configuring GNUstep.
264 If gnustep-config is not available, the old heuristics are used.
267 ** 'configure' now prefers inotify to gfile for file notification,
268 unless gfile is explicitly requested via --with-file-notification='gfile'.
271 ** 'configure' detects the kqueue file notification library on *BSD
272 and Mac OS X machines.
275 ** The configure option '--with-pkg-config-prog' has been removed.
276 Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to.
279 ** The configure option '--with-mmdf' has been removed.
280 It was no longer useful, as it relied on libraries that are no longer
281 supported, and its presence led to confusion during configuration.
282 This affects only the 'movemail' utility; Emacs itself can still
283 process MMDF-format files as before.
286 ** The configure option '--enable-silent-rules' is now the default,
287 and silent rules are now quieter. To get the old behavior where
288 'make' chatters a lot, configure with '--disable-silent-rules' or
289 build with 'make V=1'.
292 ** The configure option '--with-gameuser' now allows you to specify a
293 group instead of a user if its argument is prefixed by ':' (a colon).
294 This will cause the game score files in ${localstatedir}/games/emacs
295 to be owned by that group, and the helper program for updating them to
296 be installed setgid. The option now defaults to the 'games' group.
299 ** The 'grep-changelog' script (and its manual page) are no longer included.
300 It has no particular connection to Emacs and has not changed in years,
301 so if you want to use it, you can always take a copy from an older Emacs.
304 ** Emacs 25 comes with a new set of icons.
305 Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png.
306 The old Emacs logo icons are available as 'emacs23.png' in the same location.
309 ** New make target 'check-expensive' to run additional tests.
310 This includes all tests which run via "make check", plus additional
311 tests which take more time to perform.
314 * Startup Changes in Emacs 25.1
317 ** When Emacs is given a file as a command line argument and
318 'initial-buffer-choice' is non-nil, display both the file and
319 'initial-buffer-choice'. When Emacs is given more than one file and
320 'initial-buffer-choice' is non-nil, show 'initial-buffer-choice'
321 and *Buffer List*. This makes Emacs convenient to use from the
322 command line when 'initial-buffer-choice' is non-nil.
325 ** The value of 'initial-scratch-message' is now treated as a doc string
326 and can contain escape sequences for command keys, quotes, and the like.
329 ** The default height of GUI frames was enlarged.
330 This is so there's enough space in the initial window to display the
331 optional text about recovering crashes sessions, without losing the
332 splash image display.
335 * Changes in Emacs 25.1
338 ** Xwidgets: a new feature for embedding native widgets inside Emacs buffers.
339 If you have gtk3 and webkitgtk3 installed, and Emacs was built with
340 xwidget support, you can access the embedded webkit browser with 'M-x
341 xwidget-webkit-browse-url'. This opens a new buffer with the embedded
342 browser. The buffer will have a new mode, 'xwidget-webkit-mode'
343 (similar to 'image-mode'), which supports the webkit widget.
346 *** New functions for xwidget-webkit mode 'xwidget-webkit-insert-string',
347 'xwidget-webkit-adjust-size-dispatch', 'xwidget-webkit-back',
348 'xwidget-webkit-browse-url', 'xwidget-webkit-reload',
349 'xwidget-webkit-current-url', 'xwidget-webkit-scroll-backward',
350 'xwidget-webkit-scroll-forward', 'xwidget-webkit-scroll-down',
351 'xwidget-webkit-scroll-up'.
354 ** Emacs can now load shared/dynamic libraries (modules).
355 A dynamic Emacs module is a shared library that provides additional
356 functionality for use in Emacs Lisp programs, just like a package
357 written in Emacs Lisp would. The functions 'load', 'require',
358 'load-file', etc. were extended to load such modules, as they do with
359 Emacs Lisp packages. The new variable 'module-file-suffix' holds the
360 system-dependent value of the file-name extension ('.so' on Posix
361 hosts) of the module files.
363 A module should export a C-callable function named
364 'emacs_module_init', which Emacs will call as part of the call to
365 'load' or 'require' which loads the module. It should also export a
366 symbol named 'plugin_is_GPL_compatible' to indicate that its code is
367 released under the GPL or compatible license; Emacs will refuse to
368 load modules that don't export such a symbol.
370 If a module needs to call Emacs functions, it should do so through the
371 API defined and documented in the header file 'emacs-module.h'. Note
372 that any module that provides Lisp-callable functions will have to use
373 Emacs functions such as 'fset' and 'funcall', in order to register its
374 functions with the Emacs Lisp interpreter.
376 Modules can create 'user-ptr' Lisp objects that embed pointers to C
377 structs defined by the module. This is useful for keeping around
378 complex data structures created by a module, to be passed back to the
379 module's functions. User-ptr objects can also have associated
380 "finalizers" -- functions to be run when the object is GC'ed; this is
381 useful for freeing any resources allocated for the underlying data
382 structure, such as memory, open file descriptors, etc. A new
383 predicate 'user-ptrp' returns non-nil if its argument is a 'user-ptr'
386 Loadable modules in Emacs are an experimental feature, and subject to
387 change in future releases. For that reason, their support is disabled
388 by default, and must be enabled by using the '--with-modules' option
392 ** A second dir-local file (.dir-locals-2.el) is now accepted.
393 See the variable 'dir-locals-file-2' for more information.
396 ** Network security (TLS/SSL certificate validity and the like) is
397 added via the new Network Security Manager (NSM) and controlled via
398 the 'network-security-level' variable.
401 ** International domain names (IDNA) are now encoded via the new
402 puny.el library, so that one can visit web sites with non-ASCII URLs.
405 ** C-h l now also lists the commands that were run.
407 ** The new M-s M-w key binding uses eww to search the web for the
411 ** The new 'timer-list' command lists all active timers in a buffer
412 where you can cancel them with the 'c' command.
414 ** M-x suggests shorthands and ignores obsolete commands for completion.
415 ** x-select-enable-clipboard is renamed select-enable-clipboard.
416 x-select-enable-primary and renamed select-enable-primary.
417 Additionally they both now apply to all systems (OSX, GNUstep, Windows, you
418 name it), with the proviso that on some systems (e.g. Windows)
419 select-enable-primary is ineffective since the system doesn't
420 have the equivalent of a primary selection.
423 ** New option 'switch-to-buffer-in-dedicated-window' allows you to
424 customize how 'switch-to-buffer' proceeds interactively when the
425 selected window is strongly dedicated to its buffer.
428 ** The option 'even-window-heights' has been renamed to
429 'even-window-sizes' and now handles window widths as well.
432 ** New function 'read-multiple-choice' use to prompt for
433 multiple-choice questions, with a handy way to display help texts.
436 ** terpri gets an optional arg ENSURE to conditionally output a newline.
439 ** 'insert-register' now leaves point after the inserted text
440 when called interactively. A prefix argument toggles this behavior.
443 ** The new variable 'term-file-aliases' replaces some files from lisp/term.
444 The function 'tty-run-terminal-initialization' consults this variable
445 when deciding what terminal-specific initialization code to run.
448 ** New variable 'system-configuration-features', listing some of the
449 main features that Emacs was compiled with. This is mainly intended
450 for use in Emacs bug reports.
453 ** A password is now hidden also when typed in batch mode. Another
454 hiding character but the default '.' can be used by let-binding the
455 variable 'read-hide-char'.
458 ** The Emacs pseudo-random number generator can be securely seeded.
459 On system where Emacs can access the system entropy or some other
460 cryptographically secure random stream, it now uses that when 'random'
461 is called with its argument 't'. This allows cryptographically strong
462 random values; in particular, the Emacs server now uses this facility
463 to produce its authentication key.
466 ** New input methods: 'tamil-dvorak' and 'programmer-dvorak'.
469 * Editing Changes in Emacs 25.1
472 ** M-x suggests shorthands and ignores obsolete commands for completion.
477 *** Successive single-char deletions are collapsed in the undo-log just like
478 successive char insertions. Which commands invoke this behavior is
479 controlled by the new 'undo-auto-amalgamate' function. See the node
480 "Undo" in the ELisp manual for more details.
483 *** The heuristic used to insert 'undo-boundary' after each command
484 has changed, so that if a command causes changes in more than just the
485 current buffer, Emacs now calls 'undo-boundary' in every buffer
486 affected by the command.
489 ** New command 'comment-line' bound to 'C-x C-;'.
491 ** New and improved facilities for inserting Unicode characters
494 *** Unicode names entered via C-x 8 RET now use substring completion by default.
497 *** C-x 8 now has shorthands for several chars, such as U+2010
498 (HYPHEN), U+2011 (NON-BREAKING HYPHEN), and U+2012 (FIGURE DASH). As
499 before, you can type C-x 8 C-h to list shorthands.
502 *** New minor mode electric-quote-mode for using curved quotes as you
503 type. See also the new variable 'text-quoting-style'.
506 ** New minor mode global-eldoc-mode is enabled by default.
509 ** Emacs now uses "bracketed paste mode" on text terminals that support it.
510 Bracketed paste mode causes text terminals to wrap pasted text in special
511 escape sequences that allow Emacs to tell the difference between text
512 you type and text you paste from other applications. Emacs then
513 avoids interpreting each character in the pasted text as it does with
514 keyboard input, which results in a paste experience similar to that
515 under a window system, and significant performance improvements when
516 pasting large amounts of text.
518 Bracketed paste mode is disabled by default, so Emacs automatically
519 enables it at startup if the terminal supports it.
522 ** Emacs now supports the latest version of the UBA.
523 The Emacs implementation of the Unicode Bidirectional Algorithm (UBA)
524 was updated to support all the latest additions and changes introduced
525 in Unicode Standard versions 6.3, 7.0, and the latest Unicode 8.0.
526 This includes full support for directional isolates and the
527 Bidirectional Parentheses Algorithm (BPA) specified by these Unicode
531 ** You can access 'mouse-buffer-menu' (C-down-mouse-1) using C-f10.
534 ** New buffer-local 'electric-pair-local-mode'.
537 ** New variable 'fast-but-imprecise-scrolling' inhibits
538 fontification during full screen scrolling operations, giving less
539 hesitant operation during auto-repeat of C-v, M-v at the cost of
540 possible inaccuracies in the end position.
543 ** New documentation command 'describe-symbol'.
544 Works for functions, variables, faces, etc. It is bound to 'C-h o' by
548 ** New function 'custom-prompt-customize-unsaved-options' checks for
549 unsaved customizations and prompts user to customize (if found). It
550 is intended for adding to 'kill-emacs-query-functions'.
553 ** The old 'C-x w' bindings in hi-lock-mode are officially deprecated
554 in favor of the global 'M-s h' bindings introduced in Emacs-23.1.
555 They'll disappear soon.
558 ** New bindings for 'query-replace-map'.
559 'undo', undo the last replacement; bound to 'u'.
560 'undo-all', undo all replacements; bound to 'U'.
563 * Changes in Specialized Modes and Packages in Emacs 25.1
568 *** New command 'checkdoc-package-keywords' checks if the
569 current package keywords are recognized. Set the new option
570 'checkdoc-package-keywords-flag' to non-nil to make
571 'checkdoc-current-buffer' call this function automatically.
574 *** New function 'checkdoc-file' checks for style errors.
575 It's meant for use together with 'compile':
576 emacs -batch --eval "(checkdoc-file \"subr.el\")"
581 *** The desktop format version has been upgraded from 206 to 208.
582 Although Emacs 25.1 can read a version 206 desktop, earlier Emacsen
583 cannot read a version 208 desktop. To upgrade your desktop file, you
584 must explicitly request the upgrade, by C-u M-x desktop-save. You are
585 recommended to do this as soon as you have firmly upgraded to Emacs
586 25.1 (or later). Should you ever need to downgrade your desktop file
587 to version 206, you can do this with C-u C-u M-x desktop-save.
590 ** New function 'bookmark-set-no-overwrite' bound to C-x r M.
591 It raises an error if a bookmark of that name already exists,
592 unlike 'bookmark-set' which silently updates an existing bookmark.
597 *** New user options 'mm-html-inhibit-images' and 'mm-html-blocked-images'
598 now control how mm-* functions fetch and display images in an HTML
599 message. Gnus still uses 'gnus-inhibit-images' and 'gnus-blocked-images'
600 for that purpose, i.e., binds mm-html- variables with those gnus-
601 variables, but other packages do not have to bind gnus- variables now.
604 *** 'mm-inline-text-html-with-images' has been removed.
605 Use 'mm-html-inhibit-images' instead. Note that the value is opposite
611 *** 'imap-ssl-program' has been removed, and imap.el uses the internal
612 GnuTLS encryption functions if possible.
617 *** 'json-pretty-print' and 'json-pretty-print-buffer' now maintain
618 the ordering of object keys by default.
621 *** New commands 'json-pretty-print-ordered' and
622 'json-pretty-print-buffer-ordered' pretty prints JSON objects with
623 object keys sorted alphabetically.
626 ** Prog mode has some support for multi-mode indentation.
627 This allows better indentation support in modes that support multiple
628 programming languages in the same buffer, like literate programming
629 environments or ANTLR programs with embedded Python code.
631 A major mode can provide indentation context for a sub-mode through
632 the 'prog-indentation-context' variable. To support this, modes that
633 provide indentation should use 'prog-widen' instead of 'widen' and
634 'prog-first-column' instead of a literal zero. See the node
635 "Mode-Specific Indent" in the ELisp manual for more details.
637 ** Prettify Symbols mode
640 *** Prettify Symbols mode supports custom composition predicates. By
641 overriding the default 'prettify-symbols-compose-predicate', modes can
642 specify in which contexts a symbol may be displayed as some Unicode
643 character. 'prettify-symbols-default-compose-p' is the default which
644 is suitable for most programming languages such as C or Lisp (but not
648 *** Symbols can be unprettified while point is inside them.
649 New variable 'prettify-symbols-unprettify-at-point' configures this.
651 ** Enhanced xterm support
654 *** The new variable 'xterm-screen-extra-capabilities' for configuring xterm.
655 This variable tells Emacs which advanced capabilities are available in
656 the xterm terminal emulator used to display Emacs text-mode frames.
657 The default is to check each capability, and use it if available.
658 (This variable was introduced in Emacs 24.1, but was not announced in
662 *** Killing text now also sets the CLIPBOARD/PRIMARY selection
663 in the surrounding GUI (using the OSC-52 escape sequence). This only works
664 if your xterm supports it and enables the 'allowWindowOps' options (disabled
665 by default at least in Debian, for security reasons).
667 Similarly, you can yank the CLIPBOARD/PRIMARY selection (using the OSC-52
668 escape sequence) if your xterm has the feature enabled but for that you
669 additionally need to add 'getSelection' to 'xterm-extra-capabilities'.
672 *** 'xterm-mouse-mode' now supports mouse-tracking (if your xterm supports it).
675 ** The way to turn on and off 'save-place' mode has changed.
676 It is no longer sufficient to load the saveplace library and set
677 'save-place' non-nil. Instead, use the two new minor modes:
678 'save-place-mode' turns on saving last place in every file, and
679 'save-place-local-mode' does that only for the file in whose buffer it
680 is invoked. The 'save-place' variable is now an obsolete alias for
681 'save-place-mode', which replaces it, and 'toggle-save-place' is an
682 obsolete alias for the new 'save-place-local-mode' command.
687 *** ERC can now hide message types by network or channel.
688 'erc-hide-list' will hide all messages of the specified type, while
689 'erc-network-hide-list' and 'erc-channel-hide-list' will only hide the
690 specified message types for the respective specified targets.
692 *** New variable 'erc-default-port-tls' used to connect to TLS IRC
696 *** Reconnection is now asynchronous.
699 *** Nick completion is now case-insensitive again after inadvertently
700 being made case-sensitive in Emacs 24.2.
705 *** New commands, key binds, and menu items.
707 **** '<' and '>' for navigating previous and next tracks in playlist
709 **** New play/pause command 'mpc-toggle-play' bound to 's'
711 **** 'g' bound to new command 'mpc-seek-current' will navigate current
714 **** New commands 'mpc-toggle-{consume,repeat,single,shuffle}' for
715 toggling playback modes.
718 *** Now supports connecting to a UNIX domain socket.
721 *** Looks at more image file names to use as album art.
722 Case-insensitively tries for .folder.png (freedesktop) and folder.jpg
723 (XP) in addition to cover.jpg.
726 *** Searches in more locations for MPD configuration files.
727 MPD supports the XDG base directory specification since version 0.17.6.
732 *** 'midnight-mode' is now a proper minor mode.
735 *** clean-buffer-*-regexps can now specify buffers via predicate functions.
740 *** New "external" package status.
741 An external package is any installed package that's not built-in and
742 not from 'package-user-dir', which usually means it's from an entry in
743 'package-directory-list'. They are treated much like built-in
744 packages, in that they cannot be deleted through the package menu and
745 are not considered for upgrades.
747 The effect is that a user can manually place a specific version of a
748 package inside 'package-directory-list' and the package menu will
752 *** If a package is available on multiple archives and one has higher
753 priority (as per 'package-archive-priorities') only that one is
754 listed. This can be configured with 'package-menu-hide-low-priority'.
757 *** 'package-menu-toggle-hiding' now toggles the hiding of packages.
758 This includes the above-mentioned low-priority packages, as well as
759 available packages whose version is lower than the currently installed
760 version (which were previously impossible to display).
761 This allows users to downgrade a package if a lower version is
765 *** When filtering the package menu, keywords starting with "arc:" or
766 "status:" represent package archive or status, respectively, instead
770 *** Most functions which involve downloading information now take an
771 ASYNC argument. If it is non-nil, package.el performs the download(s)
775 *** New variable 'package-menu-async' controls whether the
776 package-menu uses asynchronous downloads.
779 *** 'package-install-from-buffer' and 'package-install-file' work on directories.
780 This follows the same rules as installing from a .tar file, except the
781 -pkg file is optional.
784 *** Packages which are dependencies of other packages cannot be deleted.
785 The FORCE argument to 'package-delete' overrides this.
788 *** New custom variable 'package-selected-packages' tracks packages
789 which were installed by the user (as opposed to installed as
790 dependencies). This variable can also be manually customized.
793 *** New command 'package-install-selected-packages' installs all
794 packages from 'package-selected-packages' which are currently missing.
797 *** 'package-install' function now takes a DONT-SELECT argument. If
798 this function is called interactively or if DONT-SELECT is nil, add the
799 package being installed to 'package-selected-packages'.
802 *** New command 'package-autoremove' removes all packages which were
803 installed strictly as dependencies but are no longer needed.
808 When you invoke 'shell' interactively, the *shell* buffer will now
809 display in a new window. However, you can customize this behavior via
810 the 'display-buffer-alist' variable. For example, to get
811 the old behavior -- *shell* buffer displays in current window -- use
812 (add-to-list 'display-buffer-alist
813 '("^\\*shell\\*$" . (display-buffer-same-window))).
817 *** The ':protection' slot option is not obeyed any more.
819 *** The 'newname' argument to constructors is optional&deprecated.
820 If you need your objects to be named, do it by inheriting from 'eieio-named'.
822 *** The <class>-list-p and <class>-child-p functions are declared obsolete.
824 *** The <class> variables are declared obsolete.
826 *** The <initarg> variables are declared obsolete.
828 *** defgeneric and defmethod are declared obsolete.
829 Use the equivalent facilities from cl-generic.el instead.
831 *** 'constructor' is now an obsolete alias for 'make-instance'.
832 --- 'pcase' accepts a new UPattern 'eieio'.
837 *** New command 'ido-bury-buffer-at-head' bound to C-S-b
838 Bury the buffer at the head of 'ido-matches', analogous to how C-k
839 kills the buffer at head.
842 *** A prefix argument to 'ido-restrict-to-matches' will reverse its
843 meaning, and the list is restricted to those elements that do not
844 match the current input.
849 *** You can use <UP> and <DOWN> arrow keys to move through history by lines.
850 The new commands 'next-line-or-history-element' and
851 'previous-line-or-history-element', bound to <UP> and <DOWN> in the
852 minibuffer, allow by-line movement through minibuffer history,
853 similarly to an ordinary buffer. Only when point moves over
854 the bottom/top of the minibuffer it goes to the next/previous history
855 element. 'M-p' and 'M-n' still move directly to previous/next history
858 ** Search and Replace
861 *** 'isearch' and 'query-replace' can now perform character folding in matches.
862 This is analogous to case folding, but instead of disregarding case
863 variants, it disregards wider classes of distinctions between similar
864 characters. (Case folding is a special case of character folding.)
865 This means many characters in the search string will match entire
866 groups of characters instead of just themselves.
868 For instance, the ASCII double quote character " will match all
869 variants of double quotes, and the letter 'a' will match all of its
870 accented cousins, even those composed of multiple characters, as well
871 as many other symbols like U+249C (PARENTHESIZED LATIN SMALL LETTER
874 Character folding is enabled by customizing 'search-default-mode' to
875 the value 'character-fold-to-regexp'. You can also toggle character
876 folding in the middle of a search by typing 'M-s ''.
878 'query-replace' honors character folding if the new variable
879 'replace-character-fold' is customized to a non-nil value.
882 *** New user option 'search-default-mode'.
883 This option specifies the default mode for Isearch. The default
884 value, nil specifies that Isearch does literal searches (however,
885 'case-fold-search' and 'isearch-lax-whitespace' may still be applied,
886 as in previous Emacs versions).
889 *** New function 'character-fold-to-regexp' can be used
890 by searching commands to produce a regexp matching anything that
891 character-folds into STRING.
894 *** The new M-s M-w key binding uses eww to search the web for the
895 text in the region. The search engine to use for this is specified by
896 the customizable variable 'eww-search-prefix'.
899 *** Query-replace history is enhanced.
900 When query-replace reads the FROM string from the minibuffer, typing
901 'M-p' will now show previous replacements as "FROM SEP TO", where FROM
902 and TO are the original text and its replacement, and SEP is an arrow
903 string defined by the new variable 'query-replace-from-to-separator'.
904 To select a prior replacement, type 'M-p' until the desired
905 replacement appears in the minibuffer, and then exit the minibuffer by
910 *** If 'quick-calc' is called with a prefix argument, insert the
911 result of the calculation into the current buffer.
914 ** In Edebug, you can now set the initial mode with C-x C-a C-m. With
915 this you can tell Edebug not to stop at the start of the first
916 instrumented function.
921 *** New minor mode 'global-eldoc-mode'
922 It is turned on by default, and affects '*scratch*' and other buffers
923 whose major mode supports Emacs Lisp.
926 *** 'eldoc-documentation-function' now defaults to 'ignore'
929 *** 'describe-char-eldoc' displays information about character at point,
930 and can be used as a default value of 'eldoc-documentation-function'. It is
931 useful when, for example, one needs to distinguish various spaces - e.g.,
932 U+00A0 (NO-BREAK SPACE), U+2002 (EN SPACE), and U+2009 (THIN SPACE) - while
933 using mono-spaced font.
938 *** HTML can now be rendered using variable-width fonts.
941 *** A new command 'F' ('eww-toggle-fonts') can be used to toggle
942 whether to use variable-pitch fonts or not. The user can also
943 customize the 'shr-use-fonts' variable.
946 *** A new command 'C' ('eww-toggle-colors') can be used to toggle
947 whether to use the HTML-specified colors or not. The user can also
948 customize the 'shr-use-colors' variable.
951 *** A new command 'R' ('eww-readable') will try do identify the main
952 textual parts of a web page and display only that, leaving menus and
953 the like off the page.
956 *** A new command 'D' ('eww-toggle-paragraph-direction') allows you to
957 toggle the paragraph direction between left-to-right and right-to-left.
960 *** Images that are being loaded are now marked with grey
961 "placeholder" images of the size specified by the HTML. They are then
962 replaced by the real images asynchronously, which will also now
963 respect width/height HTML specs (unless they specify widths/heights
964 bigger than the current window).
967 *** You can now use several eww buffers in parallel by renaming eww
968 buffers you want to keep separate.
971 *** Partial state of the eww buffers (the URIs and the titles of the
972 pages visited) is now preserved in the desktop file.
975 *** 'eww-after-render-hook' is now called after eww has rendered
976 the data in the buffer.
979 *** The 'eww-reload' command now takes a prefix to not reload via
980 the net, but just use the local copy of the HTML.
983 *** The DOM shr and eww uses has been changed to the general Emacs
984 xml.el/libxml2 DOM, and a new package dom.el has been added to
985 interact with this DOM. See the Emacs Lisp manual for interface
989 *** 'mailcap-mime-data' is now consulted when displaying PDF files.
992 *** The new 'S' command will list all eww buffers, and allow managing
996 *** https pages with valid certificates have headers marked in green, while
997 invalid certificates are marked in red.
1002 *** text/html messages that contain inline image parts will be
1003 transformed into multipart/related messages before sending.
1006 *** The 'message-valid-fqdn-regexp' variable has been removed, since
1007 there are now top-level domains added all the time. Message will no
1008 longer warn about sending emails to top-level domains it hasn't heard
1011 *** 'message-beginning-of-line' (bound to C-a) understands folded headers.
1012 In 'visual-line-mode' it will look for the true beginning of a header
1013 while in non-'visual-line-mode' it will move the point to the indented
1017 ** In Show Paren Mode, a parenthesis can be highlighted when point
1018 stands inside it, and certain parens can be highlighted when point is
1019 at BOL or EOL, or in whitespace there. To enable these, customize,
1020 respectively, 'show-paren-when-point-inside-paren' or
1021 'show-paren-when-point-in-periphery'.
1024 ** If gpg2 exists on the system, it is now used as the default value
1025 of 'epg-gpg-program' (instead of gpg).
1030 *** Images are automatically scaled before displaying based on the
1031 'image-scaling-factor' variable (if Emacs supports scaling the images
1035 *** Images inserted with 'insert-image' and related functions get a
1036 keymap put into the text properties (or overlays) that span the
1037 image. This keymap binds keystrokes for manipulating size and
1038 rotation, as well as saving the image to a file. These commands are
1039 also available in 'image-mode'.
1042 *** A new library for creating and manipulating SVG images has been
1043 added. See the "SVG Images" section in the lispref manual for
1047 *** New setf-able function to access and set image parameters is
1048 provided: 'image-property'.
1054 *** Strings after ':documentation' are highlighted as docstrings.
1055 This enhances Lisp mode fontification to handle documentation of the
1056 form '(:documentation "the doc string")' used in Common Lisp code for
1057 CLOS class and slot documentation.
1059 ** Rectangle editing
1062 *** Rectangle Mark mode can have corners past EOL or in the middle of a TAB.
1065 *** C-x C-x in rectangle-mark-mode now cycles through the four corners.
1066 *** 'string-rectangle' provides on-the-fly preview of the result.
1069 ** New font-lock functions 'font-lock-ensure' and 'font-lock-flush'.
1070 These should be used in preference to 'font-lock-fontify-buffer' when
1074 ** Macro 'minibuffer-with-setup-hook' can optionally append a function
1075 to 'minibuffer-setup-hook'.
1077 If the first argument of the macro is of the form '(:append FUN)',
1078 then FUN will be appended to 'minibuffer-setup-hook', instead of
1083 *** New functions 'cl-fresh-line', 'cl-digit-char-p', and 'cl-parse-integer'.
1086 *** 'pcase' accepts the new UPattern 'cl-struct'.
1088 ** Calendar and diary
1091 *** The default 'diary-file' is now located in .emacs.d.
1094 *** New commands to insert diary entries with Chinese dates:
1095 'diary-chinese-insert-anniversary-entry' 'diary-chinese-insert-entry'
1096 'diary-chinese-insert-monthly-entry', 'diary-chinese-insert-yearly-entry'.
1099 *** The calendar can now list and mark diary entries with Chinese dates.
1100 See 'diary-chinese-list-entries' and 'diary-chinese-mark-entries'.
1103 *** The option 'calendar-mode-line-format' can now be nil,
1104 which means to do nothing special with the mode line in calendars.
1107 *** New option 'calendar-weekend-days'.
1108 The option customizes which day headers receive the
1109 'calendar-weekend-header' face.
1112 *** New optional args N and STRING for 'holiday-greek-orthodox-easter'.
1115 *** Many items obsolete since at least version 23.1 have been removed.
1116 The majority were function/variable/face aliases, too numerous to list here.
1119 **** Functions 'calendar-one-frame-setup', 'calendar-only-one-frame-setup',
1120 'calendar-two-frame-setup', 'european-calendar', 'american-calendar'.
1122 **** Hooks 'cal-menu-load-hook', 'cal-x-load-hook'.
1124 **** Macro 'calendar-for-loop'.
1126 **** Variables 'european-calendar-style', 'diary-face', 'hebrew-holidays-{1,4}'.
1128 **** The nil and list forms of 'diary-display-function'.
1131 ** New ERT function 'ert-summarize-tests-batch-and-exit'.
1132 If the output of ERT tests in batch mode execution can be saved to a
1133 log file, then it can be passed as an argument to the above function
1134 to produce a neat summary.
1137 ** New js.el option 'js-indent-first-init'.
1142 ** Info mode now displays symbol names in fixed-pitch font.
1143 If you want to get the old behavior back, customize the 'Info-quoted'
1144 face to use the same definitions as the default face.
1147 *** 'Info-fontify-maximum-menu-size' can be t for no limit.
1150 *** 'info-display-manual' can now be given a prefix argument which (any
1151 non-nil value) directs the command to limit the completion
1152 alternatives to currently visited manuals.
1155 ** ntlm.el has support for NTLM2.
1160 *** The Rmail commands 'd', 'C-d' and 'u' take optional repeat counts
1161 to delete or undelete multiple messages.
1164 *** Rmail can now render HTML mail messages if your Emacs was built with
1165 libxml2 or if you have the Lynx browser installed. By default, Rmail
1166 will display the HTML version of a mail message that has both HTML and
1167 plain text parts, if display of HTML email is possible; customize the
1168 'rmail-mime-prefer-html' option to 'nil' if you don't want that.
1171 *** In the commands that make summaries by subject, recipients, or senders,
1172 you can no longer use commas to separate regular expressions.
1175 ** SES now supports local printer functions; see 'ses-define-local-printer'.
1177 ** Shell-script Mode
1179 *** In sh-mode you can now use 'sh-shell' as a file-local variable to
1180 specify the type of shell in use (bash, csh, etc).
1183 *** New value 'always' for 'sh-indent-after-continuation'.
1184 This provides old-style ("dumb") indentation of continued lines.
1185 See the doc string of 'sh-indent-after-continuation' for details.
1189 *** Fatal TLS errors are now silent by default.
1192 *** If Emacs isn't built with TLS support, an external TLS-capable
1193 program is used instead. This program used to be run in --insecure
1194 mode by default, but has now changed to be secure instead, and will
1195 fail if you try to connect to non-verifiable hosts. This is
1196 controlled by the 'tls-program' variable.
1201 *** The URL package accepts now the protocols "ssh", "scp" and "rsync".
1202 When 'url-handler-mode' is enabled, file operations for these
1203 protocols as well as for "telnet" and "ftp" are passed to Tramp.
1206 *** The URL package allows customizing the 'url-user-agent' string.
1207 The new 'url-user-agent' variable can be customized to be a string or
1211 *** The new interface variable 'url-request-noninteractive' can be used
1212 to specify that we're running in a noninteractive context, and that
1213 we should not be queried about things like TLS certificate validity.
1216 *** 'url-mime-accept-string' can now be used as in "interface"
1217 variable, meaning you can bind it around an 'url-retrieve' call.
1220 *** If URL is used with a https connection, the first callback argument
1221 plist will contain a :peer element that has the output of
1222 'gnutls-peer-status' (if Emacs is built with GnuTLS support).
1225 *** The new function 'url-cookie-delete-cookie' can be used to
1226 programmatically delete all cookies, or cookies from a specific
1232 *** New connection method "afp", which allows you to access Mac OS X
1233 volumes via the Apple Filing Protocol.
1236 *** New connection method "nc", which allows you to access dumb
1240 *** Method-specific parameters can be overwritten now with variable
1241 'tramp-connection-properties'.
1244 *** Handler for 'file-notify-valid-p' for remote machines that support
1245 filesystem notifications.
1250 *** New user variable 'sql-default-directory' enables remote
1251 connections using Tramp.
1254 *** New command 'sql-send-line-and-next'.
1255 This command, bound to 'C-c C-n' by default, sends the current line to
1256 the SQL process and advances to the next line, skipping whitespace and
1260 *** Added support for Vertica SQL.
1262 ** VC and related modes
1265 *** Basic push support, via 'vc-push', bound to 'C-x v P'.
1266 Implemented for Bzr, Git, Hg. As part of this change, the pre-existing
1267 (undocumented) command vc-hg-push now behaves slightly differently.
1270 *** The new command vc-region-history shows the log+diff of the active region.
1273 *** You can refresh the VC state of a file buffer with 'M-x vc-refresh-state'.
1274 This command is useful when you perform version control commands
1275 outside Emacs (e.g., from the shell prompt), or if you switch the VC
1276 back-end for the buffer's file, or remove it from version control.
1279 *** The VC state indicator in the mode line now defaults to more
1280 colorful faces to make it more obvious to the user what the state is.
1281 See the 'vc-faces' customization group.
1284 *** New option 'vc-annotate-background-mode' controls whether
1285 the color range from 'vc-annotate-color-map' is applied to the
1286 background or to the foreground.
1289 *** 'compare-windows' now compares text with the most recently selected window
1290 instead of the next window. If you want the previous behavior of
1291 comparing with the next window, customize the new option
1292 'compare-windows-get-window-function' to the value
1293 'compare-windows-get-next-window'.
1296 *** Two new faces 'compare-windows-removed' and 'compare-windows-added'
1297 replace the face 'compare-windows', which is now an obsolete alias for
1298 'compare-windows-added'.
1301 *** The VC state indicator in the mode line now has different faces
1302 corresponding to each of the possible states. See the 'vc-faces'
1303 customization group.
1306 *** 'log-edit-insert-changelog' converts "(tiny change)" to
1307 "Copyright-paperwork-exempt: yes". Set 'log-edit-rewrite-tiny-change'
1308 nil to disable this.
1311 ** VHDL mode now supports VHDL'08.
1316 *** Decimal display mode uses "," groups, so it's more
1317 fitting for use in money calculations
1320 *** Factorial works with non-integer inputs.
1325 *** Hide-IfDef mode now support full C/C++ expressions in macros,
1326 macro argument expansion, interactive macro evaluation and automatic
1327 scanning of #define'd symbols.
1330 *** New command 'hif-evaluate-macro', bound to 'C-c @ e', displays the
1331 result of evaluating a macro.
1334 *** New command 'hif-clear-all-ifdef-define', bound to 'C-c @ C', clears
1335 all defined symbols in 'hide-ifdef-env'.
1338 *** New custom variable 'hide-ifdef-header-regexp' to define C/C++ header
1339 file name patterns. Defaults to files whose extension is one of '.h',
1340 '.hh', '.hpp', '.hxx', or '.h++', matched case-insensitively.
1343 *** New custom variable 'hide-ifdef-expand-reinclusion-protection' to prevent
1344 reinclusion protected (a.k.a. "idempotent") header files from being hidden.
1345 (This could happen when an idempotent header file is visited again,
1346 when its guard symbol is already defined.) Defaults to 't'.
1349 *** New custom variable 'hide-ifdef-exclude-define-regexp' to define symbol
1350 name patterns (e.g. all "FOR_DOXYGEN_ONLY_*") to be ignored when
1351 looking for macro definitions. By default, no symbols are ignored.
1356 *** New custom variable 'tex-print-file-extension' to help users who
1357 use PDF instead of DVI.
1360 *** TeX mode now supports Prettify Symbols mode. When enabling
1361 'prettify-symbols-mode' in a tex-mode buffer, \alpha ... \omega, and
1362 many other math macros are displayed using unicode characters.
1365 ** New 'big-indent' style in 'whitespace-mode' highlights deep indentation.
1366 By default, 32 consecutive spaces or four consecutive TABs are
1367 considered to be too deep, but the new variable
1368 'whitespace-big-indent-regexp' can be customized to change that.
1371 ** New options in 'tildify-mode'.
1372 New options 'tildify-space-string', 'tildify-pattern', and
1373 'tildify-foreach-region-function' variables make
1374 'tildify-string-alist', 'tildify-pattern-alist', and
1375 'tildify-ignored-environments-alist' variables (as well as a few
1376 helper functions) obsolete.
1379 ** New package Xref replaces Etags's front-end and UI
1381 The new package Xref provides a generic framework and new commands to
1382 find and move to definitions of functions, macros, data structures
1383 etc., as well as go back to the location where you were before moving
1384 to a definition. It supersedes and obsoletes many Etags commands,
1385 while still using the etags.el code that reads the TAGS tables as one
1388 The command 'xref-find-definitions' replaces 'find-tag' and provides
1389 an interface to pick one definition among several.
1390 'tags-loop-continue' is now unbound. 'xref-pop-marker-stack' replaces
1391 'pop-tag-mark', but has a keybinding ('M-,') different from the one
1392 'pop-tag-mark' used.
1394 'xref-find-definitions-other-window' replaces 'find-tag-other-window'.
1395 'xref-find-definitions-other-frame' replaces 'find-tag-other-frame'.
1396 'xref-find-apropos' replaces 'find-tag-regexp'.
1398 As a result of this, the following commands are now obsolete:
1399 'find-tag-other-window', 'find-tag-other-frame', 'find-tag-regexp',
1402 'tags-loop-continue' is not obsolete because it's still useful in
1403 'tags-search' and 'tags-query-replace', for which there are no direct
1407 *** Variants of 'tags-search' and 'tags-query-replace' in Dired were also
1408 replaced by xref-style commands, see the "Dired" section below.
1413 'find-tag-marker-ring-length' is now an obsolete alias for
1414 'xref-marker-ring-length'. 'find-tag-marker-ring' is now an obsolete
1415 alias for a private variable. 'xref-push-marker-stack' and
1416 'xref-pop-marker-stack' should be used instead to manipulate the stack
1417 of searches for definitions.
1420 *** 'xref-find-definitions' and 'describe-function' now display
1421 information about mode local overrides (defined by cedet/mode-local.el
1422 'define-overloadable-function' 'define-mode-local-overrides').
1424 The framework's Lisp API is still experimental and can change in major,
1425 backward-incompatible ways.
1428 ** New package Project
1430 The new package Project provides generic infrastructure for dealing
1431 with projects. The main commands included in it are
1432 'project-find-file' and 'project-find-regexp'.
1434 The Lisp API of this package is still experimental.
1437 EUDC's LDAP backend has been improved.
1440 *** EUDC supports LDAP-over-SSL URLs (ldaps://).
1443 *** EUDC passes LDAP passwords through a pipe to the ldapsearch
1444 subprocess instead of on the command line.
1447 *** EUDC handles LDAP wildcards automatically so the user shouldn't
1448 need to configure this manually anymore.
1451 *** The LDAP configuration section of EUDC's manual has been
1454 There have also been customization changes.
1457 *** New custom variable 'eudc-server-hotlist' to allow specifying
1458 multiple EUDC servers in init file.
1461 *** Custom variable 'eudc-inline-query-format' defaults to completing
1462 on email and firstname instead of surname.
1465 *** Custom variable 'eudc-expansion-overwrites-query' defaults to nil
1466 to avoid interfering with the kill ring.
1469 *** Custom variable 'eudc-inline-expansion-format' defaults to
1470 "Firstname Surname <mail-address>".
1473 *** Custom variable 'eudc-options-file' defaults to
1474 "~/.emacs.d/eudc-options".
1477 *** New custom variable 'ldap-ldapsearch-password-prompt-regexp' to
1478 allow overriding the regular expression that recognizes the ldapsearch
1479 command line's password prompt.
1482 EUDC's BBDB backend now supports BBDB 3.
1485 EUDC's PH backend (eudcb-ph.el) is obsolete.
1490 *** The new built-in command 'clear' can scroll window contents out of sight.
1491 If provided with an optional non-nil argument, the scrollback contents will be cleared.
1494 *** New buffer syntax '#<buffer-name>', which is equivalent to
1495 '#<buffer buffer-name>'. This shorthand makes interacting with
1496 buffers from eshell more convenient. Custom variable
1497 'eshell-buffer-shorthand', which has been broken for a while, has been
1501 *** By default, eshell "visual" program buffers (created by
1502 'eshell-visual-commands' and similar custom vars) are no longer killed
1503 when their processes die. This fixes issues with short-lived commands
1504 and makes visual programs more useful in general. For example, if
1505 "git log" is a visual command, it will always show the visual command
1506 buffer, even if the "git log" process dies. For the old behavior,
1507 make the new option 'eshell-destroy-buffer-when-process-dies' non-nil.
1512 *** Support for the Google Chrome web browser.
1515 *** Support for the Conkeror web browser.
1518 *** Support for several ancient browsers is now officially obsolete.
1521 ** tar-mode: new 'tar-new-entry' command, allowing for new members to
1522 be added to the archive.
1527 *** Dired buffers are also auto-reverted via file notifications, if
1528 Emacs is compiled with file notification support.
1531 *** 'auto-revert-use-notify' is set to nil in 'global-auto-revert-mode'.
1532 See <http://debbugs.gnu.org/22814>.
1534 ** File Notifications
1537 *** The kqueue library is integrated for *BSD and Mac OS X machines.
1540 *** The new event 'stopped' signals, that a file notification watch is
1541 not active any longer.
1544 *** The new function 'file-notify-valid-p' checks, whether a file
1545 notification descriptor still corresponds to an activate watch.
1550 *** The command 'dired-do-compress' bound to 'Z' now can compress
1551 directories and decompress zip files.
1554 *** New command 'dired-do-compress-to' bound to 'c' can be used to
1555 compress many marked files into a single named archive. The
1556 compression command is determined from the new
1557 'dired-compress-files-alist' variable.
1560 *** In wdired, when editing files to contain slash characters,
1561 the resulting directories are automatically created. Whether
1562 to do this or not is controlled by the
1563 'wdired-create-parent-directories' variable.
1566 *** 'W' is now bound to 'browse-url-of-dired-file', and is useful for
1567 viewing HTML files and the like.
1569 *** New user interface for the 'A' and 'Q' commands.
1570 These keys, now bound to 'dired-do-find-regexp' and
1571 'dired-do-find-regexp-and-replace', work similarly to 'xref-find-apropos'
1572 and 'xref-query-replace-in-results': they present the matches
1573 in the '*xref*' buffer and let you move through the matches. No need
1574 to use 'tags-loop-continue' to resume the search or replace loop. The
1575 previous commands, 'dired-do-search' and
1576 'dired-do-query-replace-regexp', are still available, but not bound to
1577 keys; rebind 'A' and 'Q' to invoke them if you want the old behavior
1578 back. We intend to obsolete the old commands in a future release.
1580 ** Tabulated List Mode
1583 *** It is now safe for a mode that derives 'tabulated-list-mode' to not
1584 call 'tabulated-list-init-header', in which case it will have no
1588 *** 'tabulated-list-print' takes a second optional argument, update,
1589 which specifies an alternative printing method which is faster when
1590 few or no entries have changed.
1592 ** Obsolete packages
1598 *** landmark.el (moved to elpa.gnu.org)
1601 * New Modes and Packages in Emacs 25.1
1604 ** pinentry.el allows GnuPG passphrase to be prompted through the
1605 minibuffer instead of a graphical dialog, depending on whether the gpg
1606 command is called from Emacs (i.e., INSIDE_EMACS environment variable
1607 is set). This feature requires newer versions of GnuPG (2.1.5 or
1608 later) and Pinentry (0.9.5 or later). To use this feature, add
1609 "allow-emacs-pinentry" to "~/.gnupg/gpg-agent.conf" and reload the
1610 configuration with "gpgconf --reload gpg-agent".
1613 ** cl-generic.el provides CLOS-style multiple-dispatch generic functions.
1614 The main entry points are 'cl-defgeneric' and 'cl-defmethod'. See the
1615 node "Generic Functions" in the Emacs Lisp manual for more details.
1618 ** scss-mode (a minor variant of css-mode) is a major mode for editing
1619 SCSS (Sassy CSS) files.
1622 ** let-alist is a new macro (and a package) that allows one to easily
1623 let-bind the values stored in an alist.
1626 ** 'tildify-mode' allows automatic insertion of hard spaces as one
1627 types the text. Breaking line after a single-character words is
1628 forbidden by Czech and Polish typography (and may be discouraged in
1629 other languages), so 'auto-tildify-mode' makes it easier to create
1630 a typographically-correct documents.
1633 ** The 'seq' library adds sequence manipulation functions and macros
1634 that complement basic functions provided by subr.el. All functions
1635 are prefixed with 'seq-' and work on lists, strings and vectors.
1636 'pcase' accepts a new Upattern 'seq'.
1639 ** The 'map' library provides map-manipulation functions that work on
1640 alists, hash-table and arrays. All functions are prefixed with
1641 'map-'. 'pcase' accepts a new UPattern 'map'.
1644 ** The 'thunk' library provides functions and macros to control the
1645 evaluation of forms.
1648 ** js-jsx-mode (a minor variant of js-mode) provides indentation
1649 support for JSX, an XML-like syntax extension to ECMAScript.
1652 * Incompatible Lisp Changes in Emacs 25.1
1655 ** 'setq' and 'setf' must now be called with an even number of
1656 arguments. The earlier behavior of silently supplying a nil to the
1657 last variable when there was an odd number of arguments has been
1661 ** 'syntax-begin-function' is declared obsolete.
1662 Removed font-lock-beginning-of-syntax-function and the SYNTAX-BEGIN
1663 slot in font-lock-defaults.
1666 ** The new implementation of Subword mode affects word movement everywhere.
1667 When Subword mode is turned on, 'forward-word', 'backward-word', and
1668 everything that uses them will move by sub-words, effectively
1669 overriding the buffer's syntax table. Lisp programs that shouldn't be
1670 affected by Subword mode should call the new functions
1671 'forward-word-strictly' and 'backward-word-strictly' instead.
1674 ** 'package-initialize' now sets 'package-enable-at-startup' to nil if
1675 called during startup. Users who call this function in their init
1676 file and still expect it to be run after startup should set
1677 'package-enable-at-startup' to t after the call to
1678 'package-initialize'.
1681 ** ':global' minor mode use 'setq-default' rather than 'setq'.
1682 This means that you can't use 'make-local-variable' and expect them to
1683 "magically" become buffer-local.
1686 ** 'track-mouse' no longer freezes the shape of the mouse pointer.
1687 The 'track-mouse' form no longer refrains from changing the shape of
1688 the mouse pointer for the entire time the body of that form is
1689 executed. Lisp programs that use 'track-mouse' for dragging across
1690 large portions of the Emacs display, and want to avoid changes in the
1691 pointer shape during dragging, should bind the variable 'track-mouse'
1692 to the special value 'dragging' in the body of the form.
1695 ** The optional 'predicate' argument of 'lisp-complete-symbol' no longer
1696 has any effect. (This change was made in Emacs 24.4 but was not
1697 advertised at the time.)
1700 ** 'indirect-function' does not signal 'void-function' any more.
1701 This is mostly a bug-fix, since this change was missed back in 24.4 when
1702 symbol-function was changed not to signal 'void-function' any more.
1705 *** As a consequence, the second arg of 'indirect-function' is now obsolete.
1708 ** Although comint, term, and compile still set the EMACS variable,
1709 this is now considered deprecated and will be removed in a future release.
1710 Use the INSIDE_EMACS environment variable instead.
1712 ** 'C-up', 'C-down', 'C-left' and 'C-right' are now defined in term
1713 mode to send the same escape sequences that xterm does. This makes
1714 things like forward-word in readline work.
1717 ** hideshow mode got four key bindings that are analogous to outline
1718 mode bindings: 'C-c @ C-a', 'C-c @ C-t', 'C-c @ C-d', and 'C-c @ C-e.'
1721 ** 'save-excursion' does not save&restore the mark any more.
1722 Use 'save-mark-and-excursion' if you want the old behavior.
1725 ** 'read-buffer' and 'read-buffer-function' can now be called with a 4th
1726 argument ('predicate').
1729 ** 'completion-table-dynamic' by default stays in the minibuffer.
1730 The minibuffer will be the current buffer when the function is called.
1731 If you want the old behavior of calling the function in the buffer
1732 from which the minibuffer was entered, use the new argument
1733 'switch-buffer' to 'completion-table-dynamic'.
1736 ** window-configurations no longer record the buffers' marks.
1739 ** inhibit-modification-hooks now also inhibits lock-file checks, as well as
1740 active region handling.
1743 ** deactivate-mark is now buffer-local.
1746 ** 'cl-the' now asserts that its argument is of the given type.
1749 ** 'process-running-child-p' may now return a numeric process
1750 group ID instead of 't'.
1753 ** Mouse click events on mode line or header line no longer include
1754 any reference to a buffer position. The 6th member of the mouse
1755 position list returned for such events is now nil.
1758 ** Menu items in keymaps do not support the "key shortcut cache" any more.
1759 These slots used to hold key-shortcut data, but have been obsolete since
1763 ** Emacs no longer downcases the first letter of a system diagnostic
1764 when signaling a file error. For example, it now reports "Permission
1765 denied" instead of "permission denied". The old behavior was problematic
1766 in languages like German where downcasing rules depend on grammar.
1769 ** New variable 'text-quoting-style' to control how Emacs translates quotes.
1770 Set it to 'curve' for curved single quotes, to 'straight' for straight
1771 apostrophes, and to 'grave' for grave accent and apostrophe. The
1772 default value nil acts like 'curve' if curved single quotes are
1773 displayable, and like 'grave' otherwise. The new variable affects
1774 display of diagnostics and help, but not of info.
1777 ** substitute-command-keys now replaces quotes.
1778 That is, it converts documentation strings' quoting style as per the
1779 value of 'text-quoting-style'. Doc strings in source code can use
1780 either curved single quotes or grave accents and apostrophes. As
1781 before, characters preceded by \= are output as-is.
1784 ** Message-issuing functions 'error', 'message', etc. now convert quotes.
1785 They use the new 'format-message' function instead of plain 'format',
1786 so that they now follow user preference as per 'text-quoting-style'
1787 when processing curved single quotes, grave accents, and apostrophes
1788 in their format argument.
1791 ** The character classes [:alpha:] and [:alnum:] in regular expressions
1792 now match multibyte characters using Unicode character properties.
1793 If you want the old behavior where they matched any character with
1794 word syntax, use '\sw' instead.
1797 ** The character classes [:graph:] and [:print:] in regular expressions
1798 no longer match every multibyte character. Instead, Emacs now
1799 consults the Unicode character properties to determine which
1800 characters are graphic or printable. In particular, surrogates and
1801 unassigned codepoints are now rejected. If you want the old behavior,
1802 use [:multibyte:] instead.
1805 ** The 'diff' command uses the unified format now. To restore the old
1806 behavior, set 'diff-switches' to '-c'.
1809 ** 'grep-template' and 'grep-find-template' values don't include the
1810 --color argument anymore. It's added at the <C> place holder position
1811 dynamically. Any third-party code that changes these templates should
1812 be updated accordingly.
1815 ** The grep/rgrep/lgrep functions will now ask about saving files
1816 before running. This is controlled by the 'grep-save-buffers'
1820 ** '(/ N)' is now equivalent to '(/ 1 N)' rather than to '(/ N 1)'.
1821 The new behavior is compatible with Common Lisp and with XEmacs.
1822 This change does not affect Lisp code intended to be portable to
1823 Emacs 24.2 and earlier, which did not support unary '/'.
1826 ** The 'default-directory' value doesn't have to end slash. To make
1827 that happen, 'unhandled-file-name-directory' now defaults to calling
1828 'file-name-as-directory'.
1831 * Lisp Changes in Emacs 25.1
1835 *** New UPatterns 'quote', 'app'.
1837 *** New UPatterns can be defined with 'pcase-defmacro'.
1839 *** New vector QPattern.
1842 ** syntax-propertize is now automatically called on-demand during forward
1843 parsing functions like 'forward-sexp'.
1846 ** New hooks 'prefix-command-echo-keystrokes-functions' and
1847 'prefix-command-preserve-state-hook' allow the definition of prefix
1848 commands other than the predefined 'C-u'.
1851 ** New functions 'filepos-to-bufferpos' and 'bufferpos-to-filepos'.
1852 These allow conversion between buffer positions and the corresponding
1853 file byte offsets, given the file's encoding.
1856 ** The default value of 'load-read-function' is now 'read'.
1857 Previously, the default value of 'nil' implied using 'read'.
1860 ** New hook 'pre-redisplay-functions'.
1861 It is a bit easier to use than 'pre-redisplay-function'.
1864 ** The second arg of 'looking-back' should always be provided explicitly.
1865 Previously, it was an optional argument, now it's mandatory.
1868 ** Text properties 'intangible', 'point-entered', and 'point-left' are obsolete.
1869 Replaced by properties 'cursor-intangible' and 'cursor-sensor-functions',
1870 implemented by the new 'cursor-intangible-mode' and
1871 'cursor-sensor-mode' minor modes.
1874 ** 'inhibit-point-motion-hooks' now defaults to 't' and is obsolete.
1875 Use the new minor modes 'cursor-intangible-mode' and
1876 'cursor-sensor-mode' instead.
1879 ** New process type 'pipe', which can be used in combination with the
1880 ':stderr' keyword of make-process to handle standard error output
1884 ** New function 'make-process' provides an alternative interface to
1885 'start-process'. It allows programs to set process parameters such as
1886 process filter, sentinel, etc., through keyword arguments (similar to
1887 'make-network-process').
1890 ** A new function 'directory-files-recursively' returns all matching
1891 files (recursively) under a directory.
1894 ** New variable 'inhibit-message', when bound to non-nil, inhibits
1895 'message' and related functions from displaying messages in the echo
1896 area. The output is still logged to the *Messages* buffer.
1899 ** A new text property 'inhibit-read-only' can be used in read-only
1900 buffers to allow certain parts of the text to be writable.
1903 ** A new variable 'comment-end-can-be-escaped' is useful in languages
1904 such as C and C++ where line comments with escaped newlines are
1905 continued to the next line.
1908 ** New macro 'define-advice'.
1911 ** Emacs Lisp now supports generators.
1912 See the "Generators" section of the ELisp manual for the details.
1915 ** New finalizer facility for running code when objects become unreachable.
1916 See the "Finalizer Type" subsection in the ELisp manual for the
1920 ** lexical closures can use (:documentation FORM) to build their docstring.
1921 It should be placed right where the docstring would be, and FORM is then
1922 evaluated (and should return a string) when the closure is built.
1925 ** The new command 'fortune-message' has been added, which displays
1926 fortunes in the echo area.
1929 ** define-inline provides a new way to define inlinable functions.
1932 ** New function 'macroexpand-1' to perform a single step of macro expansion.
1935 ** Some "x-*" functions were obsoleted and/or renamed:
1936 *** x-select-text is renamed gui-select-text.
1937 *** x-selection-value is renamed gui-selection-value.
1938 *** x-get-selection is renamed gui-get-selection.
1939 *** x-get-clipboard and x-clipboard-yank are marked obsolete.
1940 *** x-get-selection-value is renamed to gui-get-primary-selection.
1941 *** x-set-selection is renamed to gui-set-selection
1944 ** New function 'string-greaterp', which return the opposite result of
1948 ** The new functions 'string-collate-lessp' and 'string-collate-equalp'
1949 preserve the collation order as defined by the system's locale(1)
1950 environment. For the time being this is implemented for modern POSIX
1951 systems and for MS-Windows, for other systems they fall back to their
1952 counterparts 'string-lessp' and 'string-equal'.
1955 ** The new function 'string-version-lessp' compares strings by
1956 interpreting consecutive runs of numerical characters as numbers, and
1957 compares their numerical values. According to this predicate,
1958 "foo2.png" is smaller than "foo12.png".
1961 *** The ls-lisp package uses 'string-collate-lessp' to sort file names.
1962 The effect is that, on systems that use ls-lisp for Dired, the default
1963 sort order of the files in Dired is now different from what it was in
1964 previous versions of Emacs. In particular, the file names are sorted
1965 disregarding punctuation, accents, and diacritics, and letter case is
1966 ignored. For example, files whose name begin with a period will no
1967 longer appear near the beginning of the directory listing. If you
1968 want the old, locale-independent sorting, customize the new option
1969 'ls-lisp-use-string-collate' to the nil value.
1972 *** The MS-Windows specific variable 'w32-collate-ignore-punctuation',
1973 if set to a non-nil value, causes the above 2 functions to ignore
1974 symbol and punctuation characters when collating strings. This
1975 emulates the behavior of modern Posix platforms when the locale's
1976 codeset is "UTF-8" (as in "en_US.UTF-8"). This is needed because
1977 MS-Windows doesn't support UTF-8 as codeset in its locales.
1980 ** New function 'alist-get', which is also a valid place (aka lvalue).
1983 ** New function 'funcall-interactively', which works like 'funcall'
1984 but makes 'called-interactively-p' treat the function as (you guessed it)
1985 called interactively.
1988 ** New function 'function-put' to use instead of 'put' for function properties.
1991 ** The new function 'bidi-find-overridden-directionality' allows you to
1992 find characters whose directionality was, perhaps maliciously,
1993 overridden by directional override control characters. Lisp programs
1994 can use this to detect potential phishing of URLs and other links that
1995 exploits bidirectional display reordering.
1998 ** The new function 'buffer-substring-with-bidi-context' allows you to
1999 copy a portion of a buffer into a different location while preserving
2000 the visual appearance both of the copied text and the text at
2001 destination, even when the copied text includes mixed bidirectional
2002 text and directional control characters.
2005 ** New properties that can be specified with 'declare':
2006 *** (interactive-only INSTEAD), says to use INSTEAD for non-interactive use.
2007 *** (pure VAL), if VAL is non-nil, indicates the function is pure.
2008 *** (side-effect-free VAL), if VAL is non-nil, indicates the function does not
2012 ** New macro 'with-file-modes', for evaluating expressions with default file
2013 permissions set to temporary values (e.g., for creating private files).
2016 ** You can access the slots of structures using 'cl-struct-slot-value'.
2019 ** Function 'sort' can deal with vectors.
2022 ** Function 'system-name' now returns an updated value if the current
2023 system's name has changed or if the Emacs process has changed systems,
2024 and to avoid long waits it no longer consults DNS to canonicalize the
2025 name. The variable 'system-name' is now obsolete.
2028 ** Function 'write-region' no longer outputs "Wrote FILE" in batch mode.
2031 ** If 'pwd' is called with a prefix argument, insert the current default
2035 ** New functions return extended information about fonts and faces.
2038 *** The function 'font-info' now returns more details about a font.
2039 In particular, it now returns the average width of the font's
2040 characters, which can be used for geometry-related calculations.
2043 *** A new function 'default-font-width' returns the average width of a
2044 character in the current buffer's default font. If the default face
2045 is remapped (see 'face-remapping-alist'), the value for the remapped
2046 face is returned. This function complements the existing function
2047 'default-font-height'.
2050 *** New functions 'window-font-height' and 'window-font-width' return
2051 the height and average width of characters in a specified face and
2052 window. If FACE is remapped (see 'face-remapping-alist'), the
2053 function returns the information for the remapped face.
2056 *** A new function 'window-max-chars-per-line' returns the maximal
2057 number of characters that can be displayed on one line. If a face
2058 and/or window are provided, these values are used for the
2059 calculation. This function is different from 'window-body-width' in
2060 that it accounts for (i) continuation glyphs, (ii) the size of the
2061 font, and (iii) the specified window.
2064 ** New utilities in subr-x.el:
2065 *** New macros 'if-let' and 'when-let' allow defining bindings and to
2066 execute code depending whether all values are true.
2067 *** New macros 'thread-first' and 'thread-last' allow threading a form
2068 as the first or last argument of subsequent forms.
2071 ** Documentation strings now support quoting with curved single quotes
2072 in addition to the old style with grave accent and apostrophe. The
2073 new style looks better on today's displays. In the new Electric Quote
2074 mode, you can enter curved single quotes into documentation by typing
2075 grave accent and apostrophe. Outside Electric Quote mode, you can
2076 enter them by typing 'C-x 8 [' and 'C-x 8 ]', or (if your Alt key
2077 works) by typing 'A-[' and 'A-]'. As described above under
2078 'text-quoting-style', the user can specify how to display doc string
2082 ** New function 'format-message' is like 'format' and also converts
2083 curved single quotes, grave accents and apostrophes as per
2084 'text-quoting-style'.
2087 ** show-help-function's arg is converted via substitute-command-keys
2088 before being passed to the function. Help strings, help-echo
2089 properties, etc. can therefore contain command key escapes and
2093 ** Time-related changes:
2095 *** Time conversion functions now accept an optional ZONE argument
2096 that specifies the time zone rules for conversion. ZONE is omitted or
2097 nil for Emacs local time, t for Universal Time, 'wall' for system wall
2098 clock time, or a string as in 'set-time-zone-rule' for a time zone
2099 rule. The affected functions are 'current-time-string',
2100 'current-time-zone', 'decode-time', and 'format-time-string'. The
2101 function 'encode-time', which already accepted a simple time zone rule
2102 argument, has been extended to accept all the new forms.
2104 *** Time-related functions now consistently accept numbers
2105 (representing seconds since the epoch) and nil (representing the
2106 current time) as well as the usual list-of-integer representation.
2107 Affected functions include 'current-time-string', 'current-time-zone',
2108 'decode-time', 'float-time', 'format-time-string', 'seconds-to-time',
2109 'time-add', 'time-less-p', 'time-subtract', 'time-to-day-in-year',
2110 'time-to-days', and 'time-to-seconds'.
2112 *** The 'encode-time-value' and 'with-decoded-time-value' macros have
2115 *** 'calendar-next-time-zone-transition', 'time-add', and
2116 'time-subtract' no longer return time values in the obsolete and
2117 undocumented integer-pair format. Instead, they return a list of two
2121 ** New function 'set-binary-mode' allows switching a standard stream
2122 of the Emacs process to binary I/O mode.
2125 ** The new function 'directory-name-p' can be used to check whether a file
2126 name (as returned from, for instance, 'file-name-all-completions') is
2127 a directory file name. It returns non-nil if the last character in
2128 the name is a directory separator character (forward slash on GNU and
2129 Unix systems, forward- or backslash on MS-Windows and MS-DOS).
2132 ** ASCII approximations to curved quotes are put in standard-display-table
2133 if the terminal cannot display curved quotes.
2136 ** Standard output and error streams now transliterate characters via
2137 standard-display-table, and encode output using locale-coding-system.
2138 To force a specific encoding, bind 'coding-system-for-write' to the
2139 coding-system of your choice when invoking functions like 'prin1' and
2143 ** New var 'truncate-string-ellipsis' to choose how to indicate truncation.
2146 ** New possible value for 'system-type': 'nacl'.
2147 This is used by Google's Native Client (NaCl).
2150 ** 'read-color' will now display the color names using the color itself
2151 as the background color.
2154 ** There is now a new variable 'flyspell-sort-corrections-function'
2155 that allows changing the way corrections are sorted.
2157 ** Miscellaneous name change
2160 For consistency with the usual Emacs spelling, the Lisp variable
2161 'hfy-optimisations' has been renamed to 'hfy-optimizations'.
2162 The old name should still work, as an obsolescent alias.
2164 ** Changes in Frame- and Window- Handling
2167 *** Emacs can now draw horizontal scroll bars on some platforms that
2168 provide toolkit scroll bars, namely Gtk+, Lucid, Motif and Windows.
2169 Horizontal scroll bars are turned off by default.
2171 **** New function 'horizontal-scroll-bars-available-p' telling whether
2172 horizontal scroll bars are available on the underlying system.
2174 **** New mode 'horizontal-scroll-bar-mode' to toggle horizontal scroll
2175 bars on all existing and future frames.
2177 **** New function 'toggle-horizontal-scroll-bar' to toggle horizontal
2178 scroll bars on the selected frame.
2180 **** New frame parameters 'horizontal-scroll-bars' and
2181 'scroll-bar-height' to set horizontal scroll bars and their height
2182 for individual frames and in 'default-frame-alist'.
2184 **** New functions 'frame-scroll-bar-height' and
2185 'window-scroll-bar-height' return the height of horizontal scroll
2186 bars on a specific frame or window.
2188 **** 'set-window-scroll-bars' now accepts five parameters where the last
2189 two specify height and type of the window's horizontal scroll bar.
2191 **** 'window-scroll-bars' now returns type and sizes of horizontal scroll
2194 **** New buffer-local variables 'horizontal-scroll-bar' and
2195 'scroll-bar-height'.
2198 *** New functions 'frame-geometry' and 'frame-edges' give access to a
2202 *** New functions 'mouse-absolute-pixel-position' and
2203 'set-mouse-absolute-pixel-position' get/set screen coordinates of the
2207 *** The function 'window-edges' now accepts three additional arguments to
2208 retrieve body, absolute and pixel edges of the window.
2211 *** The functions 'window-inside-edges', 'window-inside-pixel-edges' and
2212 'window-inside-absolute-pixel-edges' have been renamed to respectively
2213 'window-body-edges', 'window-body-pixel-edges' and
2214 'window-absolute-body-pixel-edges'. The old names are kept as aliases.
2217 *** New function 'window-absolute-pixel-position' to get the screen
2218 coordinates of a visible buffer position.
2221 *** The height of a frame's menu and tool bar are no longer counted in the
2222 frame's text height. This means that the text height stands only for
2223 the height of the frame's root window plus that of the echo area (if
2224 present). This was already the behavior for frames with external tool
2225 and menu bars (like in the Gtk builds) but has now been extended to all
2229 *** Frames now do not necessarily preserve the number of columns or lines
2230 they display when setting default font, menu bar, fringe width, or
2231 scroll bars. In particular, maximized and fullscreen frames are
2232 conceptually never resized if such settings change. For fullheight and
2233 fullwidth frames, the behavior may depend on the toolkit used.
2234 **** New option 'frame-inhibit-implied-resize' if non-nil, means that
2235 setting default font, menu bar, fringe width, or scroll bars of a
2236 specific frame does not resize that frame in order to preserve the
2237 number of columns or lines it displays.
2240 *** New function 'window-preserve-size' allows you to preserve the size of
2241 a window without "fixing" it. It's supported by 'fit-window-to-buffer',
2242 'temp-buffer-resize-mode' and 'display-buffer'.
2245 *** New 'display-buffer' action function 'display-buffer-use-some-frame'.
2246 This displays the buffer in an existing frame other than the current
2247 frame, and allows the caller to specify a frame predicate to exclude
2251 *** New minor mode 'window-divider-mode' and options
2252 'window-divider-default-places', 'window-divider-default-bottom-width'
2253 and 'window-divider-default-right-width'.
2256 *** The window displaying the '*Completions*' buffer with minibuffer
2257 completion candidates is now shown at the bottom of the selected
2258 frame. The size of that window is always as large as required to
2259 display all the candidates, except when limited by the minimum size
2260 of the other windows on that frame; those other windows are resized
2261 to provide space for the '*Completions*' display. The Emacs manual
2262 describes how to customize 'display-buffer-alist' to get back the old
2263 behavior, see the node "Temporary Displays" there.
2266 ** Tearoff menus and detachable toolbars for Gtk+ have been removed.
2267 Those features have been deprecated in Gtk+ for a long time.
2272 *** etags no longer qualifies class members by default.
2274 By default, 'etags' will not qualify class members for Perl and C-like
2275 object-oriented languages with their class names and namespaces, and
2276 will remove qualifications used explicitly in the code from the tag
2277 names it puts in TAGS files. This is so the etags.el back-end for
2278 'xref-find-definitions' is more accurate and produces less false
2281 Use --class-qualify (-Q) if you want the old default behavior of
2282 qualifying class members in C++, Java, Objective C, and Perl. Note
2283 that using -Q might make some class members become "unknown" to 'M-.'
2284 ('xref-find-definitions'); if so, you can use 'C-u M-.' to specify the
2285 qualified names by hand.
2288 *** New language Ruby
2290 Names of modules, classes, methods, functions, and constants are
2291 tagged. Overloaded operators are also tagged.
2295 Names of packages, functions, and types are tagged.
2298 *** Improved support for Lua
2300 Etags now tags functions even if the "function" keyword follows some
2301 whitespace at line beginning.
2304 * Changes in Emacs 25.1 on Non-Free Operating Systems
2307 ** MS-Windows specific Emacs build scripts are no longer in the distribution
2308 This includes the makefile.w32-in files in various subdirectories, and
2309 the support files. The file nt/configure.bat now just tells the user
2310 to use the procedure described in nt/INSTALL, by running the Posix
2311 'configure' script in the top-level directory.
2314 ** Building Emacs for MS-Windows requires at least Windows XP
2315 or Windows Server 2003. The built binaries still run on all versions
2316 of Windows starting with Windows 9X.
2319 ** Emacs running on MS-Windows now supports the daemon mode.
2322 ** The byte counts in etags-generated TAGS files are now the same on
2323 MS-Windows as they are on other platforms.
2326 ** On OS X, configure creates a Cocoa ("Nextstep") build by default.
2327 Pass '--without-ns' to configure to create an X11 build, the old default.
2330 ** OS X 10.5 or older is no longer supported.
2333 ** OS X on PowerPC is no longer supported.
2336 ** New variable 'ns-use-fullscreen-animation' controls animation for
2337 non-native NS fullscreen. The default is nil. Set to t to enable
2338 animation when entering and leaving fullscreen. For native OSX fullscreen
2342 ** The new function 'w32-application-type' returns the type of an
2343 MS-Windows application given the name of its executable program file.
2345 ** New variable 'w32-pipe-buffer-size'.
2346 It can be used to tune the size of the buffer of pipes created for
2347 communicating with subprocesses, when the program run by a subprocess
2348 exhibits unusual buffering behavior. Default is zero, which lets the
2349 OS use its default size.
2352 ----------------------------------------------------------------------
2353 This file is part of GNU Emacs.
2355 GNU Emacs is free software: you can redistribute it and/or modify
2356 it under the terms of the GNU General Public License as published by
2357 the Free Software Foundation, either version 3 of the License, or
2358 (at your option) any later version.
2360 GNU Emacs is distributed in the hope that it will be useful,
2361 but WITHOUT ANY WARRANTY; without even the implied warranty of
2362 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2363 GNU General Public License for more details.
2365 You should have received a copy of the GNU General Public License
2366 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2372 paragraph-separate: "[
\f]*$"