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 ** 'fill-paragraph' no longer marks the buffer as changed unless it
62 actually changed something.
65 ** The locale language name 'ca' is now mapped to the language
66 environment 'Catalan', which has been added.
69 ** 'align-regexp' has a separate history for its interactive argument
70 'align-regexp' no longer shares its history with all other
71 history-less functions that use 'read-string'
74 ** The networking code has been reworked so that it's more
75 asynchronous than it was (when specifying :nowait t in
76 'make-network-process'). How asynchronous it is varies based on the
77 capabilities of the system, but on a typical GNU/Linux system the DNS
78 resolution, the connection, and (for TLS streams) the TLS negotiation
79 are all done without blocking the main Emacs thread. To get
80 asynchronous TLS, the TLS boot parameters have to be passed in (see
81 the manual for details).
83 Certain process oriented functions (like 'process-datagram-address')
84 will block until socket setup has been performed. The recommended way
85 to deal with asynchronous sockets is to avoid interacting with them
86 until they have changed status to "run". This is most easily done
87 from a process sentinel.
89 ** 'make-network-process' and 'open-network-stream' sometimes allowed
90 :service to be an integer string (e.g., :service "993") and sometimes
91 required an integer (e.g., :service 993). This difference has been
92 eliminated, and integer strings work everywhere.
94 ** It is possible to disable attempted recovery on fatal signals
96 Two new variables allow to disable attempts to recover from stack
97 overflow and to avoid automatic auto-save when Emacs is delivered a
98 fatal signal. 'attempt-stack-overflow-recovery', if set to 'nil',
99 will disable attempts to recover from C stack overflows; Emacs will
100 then crash as with any other fatal signal.
101 'attempt-orderly-shutdown-on-fatal-signal', if set to 'nil', will
102 disable attempts to auto-save the session and shut down in an orderly
103 fashion when Emacs receives a fatal signal; instead, Emacs will
104 terminate immediately. Both variables are non-'nil' by default.
105 These variables are for users who would like to avoid the small
106 probability of data corruption due to techniques Emacs uses to recover
110 * Editing Changes in Emacs 25.2
113 * Changes in Specialized Modes and Packages in Emacs 25.2
118 *** A new 's' command for switching to another eww buffer via the minibuffer.
121 *** The 'o' command ('shr-save-contents') has moved to 'O' to avoid collision
122 with the 'o' command from 'image-map'.
125 ** The commands that add ChangeLog entries now prefer a VCS root directory
126 for the ChangeLog file, if none already exists. Customize
127 'change-log-directory-files' to nil for the old behavior.
130 ** Support for non-string values of 'time-stamp-format' has been removed.
135 *** New connection method "sg", which allows to edit files under
139 *** New connection method "doas" for OpenBSD hosts.
142 ** 'auto-revert-use-notify' is set back to t in 'global-auto-revert-mode'.
147 *** Support for completing attribute values using the 'completion-at-point'
151 * New Modes and Packages in Emacs 25.2
154 * Incompatible Lisp Changes in Emacs 25.2
157 ** Resizing a frame no longer runs 'window-configuration-change-hook'.
158 Put your function on 'window-size-change-functions' instead.
161 * Lisp Changes in Emacs 25.2
163 ** New var syntax-ppss-table to control the syntax-table used in syntax-ppss
165 ** Autoload files can be generated without timestamps,
166 by setting 'autoload-timestamps' to nil.
167 FIXME As an experiment, nil is the current default.
168 If no insurmountable problems before next release, it can stay that way.
170 ** 'ert-with-function-mocked' of 'ert-x package allows mocking of functions
174 ** 'gnutls-boot' now takes a parameter :complete-negotiation that says
175 that negotiation should complete even on non-blocking sockets.
178 ** New functions 'window-pixel-width-before-size-change' and
179 'window-pixel-height-before-size-change' allow to detect which window
180 changed size when 'window-size-change-functions' are run.
183 ** New function 'display-buffer-reuse-mode-window' is an action function
184 suitable for use in 'display-buffer-alist'. For example, to avoid creating
185 a new window when opening man pages when there's already one, use
186 (add-to-list 'display-buffer-alist
187 '("\\`\\*Man .*\\*\\'" .
188 (display-buffer-reuse-mode-window
189 (inhibit-same-window . nil)
193 ** New function 'func-arity' returns information about the argument list
194 of an arbitrary function.
195 This is a generalization of 'subr-arity' for functions that are not
196 built-in primitives. We recommend using this new function instead of
200 ** 'parse-partial-sexp' state has a new element. Element 10 is
201 non-nil when the last character scanned might be the first character
202 of a two character construct, i.e. a comment delimiter or escaped
203 character. Its value is the syntax of that last character.
206 ** 'parse-partial-sexp''s state, element 9, has now been confirmed as
207 permanent and documented, and may be used by Lisp programs. Its value
208 is a list of currently open parenthesis positions, starting with the
209 outermost parenthesis.
212 * Changes in Emacs 25.2 on Non-Free Operating Systems
214 ** Intercepting hotkeys on Windows 7 and later now works better.
215 The new keyboard hooking code properly grabs system hotkeys such as
216 Win-* and Alt-TAB, in a way that Emacs can get at them before the
217 system. This makes the 'w32-register-hot-key' functionality work
218 again on all versions of MS-Windows starting with Windows 7. On
219 Windows NT and later you can now register any hotkey combination. (On
220 Windows 9X, the previous limitations, spelled out in the Emacs manual,
224 * Installation Changes in Emacs 25.1
227 ** Building Emacs now requires C99 or later.
230 ** Building Emacs now requires GNU make, version 3.81 or later.
233 ** New configure option --with-cairo.
234 This builds Emacs with Cairo drawing. As a side effect, it provides
235 support for built-in printing, when Emacs was built with GTK+.
236 Cairo drawing is an experimental feature in Emacs, and subject to
237 change in future releases.
240 ** New configure option --with-modules.
241 This enables support for loading dynamic modules; see below.
244 ** By default, Emacs no longer works on IRIX. We expect that Emacs
245 users are not affected by this, as SGI stopped supporting IRIX in
246 December 2013. If you are affected, please send a bug report. You
247 should be able to work around the problem either by porting the Emacs
248 undumping code to GCC under IRIX, or by configuring --with-wide-int,
249 or by sticking with Emacs 24.4.
252 ** The Emacs garbage collector assumes GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS.
253 The GC_MAKE_GCPROS_NOOPS stack-marking variant has been the default
254 since Emacs 24.4, and the other variants were undocumented and were
255 obstacles to maintenance and development. GC_MARK_STACK and its
256 related symbols have been removed from the C internals.
259 ** 'configure' now prefers gnustep-config when configuring GNUstep.
260 If gnustep-config is not available, the old heuristics are used.
263 ** 'configure' now prefers inotify to gfile for file notification,
264 unless gfile is explicitly requested via --with-file-notification='gfile'.
267 ** 'configure' detects the kqueue file notification library on *BSD
268 and Mac OS X machines.
271 ** The configure option '--with-pkg-config-prog' has been removed.
272 Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to.
275 ** The configure option '--with-mmdf' has been removed.
276 It was no longer useful, as it relied on libraries that are no longer
277 supported, and its presence led to confusion during configuration.
278 This affects only the 'movemail' utility; Emacs itself can still
279 process MMDF-format files as before.
282 ** The configure option '--enable-silent-rules' is now the default,
283 and silent rules are now quieter. To get the old behavior where
284 'make' chatters a lot, configure with '--disable-silent-rules' or
285 build with 'make V=1'.
288 ** The configure option '--with-gameuser' now allows you to specify a
289 group instead of a user if its argument is prefixed by ':' (a colon).
290 This will cause the game score files in ${localstatedir}/games/emacs
291 to be owned by that group, and the helper program for updating them to
292 be installed setgid. The option now defaults to the 'games' group.
295 ** The 'grep-changelog' script (and its manual page) are no longer included.
296 It has no particular connection to Emacs and has not changed in years,
297 so if you want to use it, you can always take a copy from an older Emacs.
300 ** Emacs 25 comes with a new set of icons.
301 Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png.
302 The old Emacs logo icons are available as 'emacs23.png' in the same location.
305 ** New make target 'check-expensive' to run additional tests.
306 This includes all tests which run via "make check", plus additional
307 tests which take more time to perform.
310 * Startup Changes in Emacs 25.1
313 ** When Emacs is given a file as a command line argument and
314 'initial-buffer-choice' is non-nil, display both the file and
315 'initial-buffer-choice'. When Emacs is given more than one file and
316 'initial-buffer-choice' is non-nil, show 'initial-buffer-choice'
317 and *Buffer List*. This makes Emacs convenient to use from the
318 command line when 'initial-buffer-choice' is non-nil.
321 ** The value of 'initial-scratch-message' is now treated as a doc string
322 and can contain escape sequences for command keys, quotes, and the like.
325 * Changes in Emacs 25.1
328 ** Xwidgets: a new feature for embedding native widgets inside Emacs buffers.
329 If you have gtk3 and webkitgtk3 installed, and Emacs was built with
330 xwidget support, you can access the embedded webkit browser with 'M-x
331 xwidget-webkit-browse-url'. This opens a new buffer with the embedded
332 browser. The buffer will have a new mode, 'xwidget-webkit-mode'
333 (similar to 'image-mode'), which supports the webkit widget.
336 *** New functions for xwidget-webkit mode 'xwidget-webkit-insert-string',
337 'xwidget-webkit-adjust-size-dispatch', 'xwidget-webkit-back',
338 'xwidget-webkit-browse-url', 'xwidget-webkit-reload',
339 'xwidget-webkit-current-url', 'xwidget-webkit-scroll-backward',
340 'xwidget-webkit-scroll-forward', 'xwidget-webkit-scroll-down',
341 'xwidget-webkit-scroll-up'.
344 ** Emacs can now load shared/dynamic libraries (modules).
345 A dynamic Emacs module is a shared library that provides additional
346 functionality for use in Emacs Lisp programs, just like a package
347 written in Emacs Lisp would. The functions 'load', 'require',
348 'load-file', etc. were extended to load such modules, as they do with
349 Emacs Lisp packages. The new variable 'module-file-suffix' holds the
350 system-dependent value of the file-name extension ('.so' on Posix
351 hosts) of the module files.
353 A module should export a C-callable function named
354 'emacs_module_init', which Emacs will call as part of the call to
355 'load' or 'require' which loads the module. It should also export a
356 symbol named 'plugin_is_GPL_compatible' to indicate that its code is
357 released under the GPL or compatible license; Emacs will refuse to
358 load modules that don't export such a symbol.
360 If a module needs to call Emacs functions, it should do so through the
361 API defined and documented in the header file 'emacs-module.h'. Note
362 that any module that provides Lisp-callable functions will have to use
363 Emacs functions such as 'fset' and 'funcall', in order to register its
364 functions with the Emacs Lisp interpreter.
366 Modules can create 'user-ptr' Lisp objects that embed pointers to C
367 structs defined by the module. This is useful for keeping around
368 complex data structures created by a module, to be passed back to the
369 module's functions. User-ptr objects can also have associated
370 "finalizers" -- functions to be run when the object is GC'ed; this is
371 useful for freeing any resources allocated for the underlying data
372 structure, such as memory, open file descriptors, etc. A new
373 predicate 'user-ptrp' returns non-nil if its argument is a 'user-ptr'
376 Loadable modules in Emacs are an experimental feature, and subject to
377 change in future releases. For that reason, their support is disabled
378 by default, and must be enabled by using the '--with-modules' option
382 ** A second dir-local file (.dir-locals-2.el) is now accepted.
383 See the variable 'dir-locals-file-2' for more information.
386 ** Network security (TLS/SSL certificate validity and the like) is
387 added via the new Network Security Manager (NSM) and controlled via
388 the 'network-security-level' variable.
391 ** International domain names (IDNA) are now encoded via the new
392 puny.el library, so that one can visit web sites with non-ASCII URLs.
395 ** C-h l now also lists the commands that were run.
397 ** The new M-s M-w key binding uses eww to search the web for the
401 ** The new 'timer-list' command lists all active timers in a buffer
402 where you can cancel them with the 'c' command.
404 ** M-x suggests shorthands and ignores obsolete commands for completion.
405 ** x-select-enable-clipboard is renamed select-enable-clipboard.
406 x-select-enable-primary and renamed select-enable-primary.
407 Additionally they both now apply to all systems (OSX, GNUstep, Windows, you
408 name it), with the proviso that on some systems (e.g. Windows)
409 select-enable-primary is ineffective since the system doesn't
410 have the equivalent of a primary selection.
413 ** New option 'switch-to-buffer-in-dedicated-window' allows you to
414 customize how 'switch-to-buffer' proceeds interactively when the
415 selected window is strongly dedicated to its buffer.
418 ** The option 'even-window-heights' has been renamed to
419 'even-window-sizes' and now handles window widths as well.
422 ** New function 'read-multiple-choice' use to prompt for
423 multiple-choice questions, with a handy way to display help texts.
426 ** terpri gets an optional arg ENSURE to conditionally output a newline.
429 ** 'insert-register' now leaves point after the inserted text
430 when called interactively. A prefix argument toggles this behavior.
433 ** The new variable 'term-file-aliases' replaces some files from lisp/term.
434 The function 'tty-run-terminal-initialization' consults this variable
435 when deciding what terminal-specific initialization code to run.
438 ** New variable 'system-configuration-features', listing some of the
439 main features that Emacs was compiled with. This is mainly intended
440 for use in Emacs bug reports.
443 ** A password is now hidden also when typed in batch mode. Another
444 hiding character but the default '.' can be used by let-binding the
445 variable 'read-hide-char'.
448 ** The Emacs pseudo-random number generator can be securely seeded.
449 On system where Emacs can access the system entropy or some other
450 cryptographically secure random stream, it now uses that when 'random'
451 is called with its argument 't'. This allows cryptographically strong
452 random values; in particular, the Emacs server now uses this facility
453 to produce its authentication key.
456 ** New input methods: 'tamil-dvorak' and 'programmer-dvorak'.
459 * Editing Changes in Emacs 25.1
462 ** M-x suggests shorthands and ignores obsolete commands for completion.
467 *** Successive single-char deletions are collapsed in the undo-log just like
468 successive char insertions. Which commands invoke this behavior is
469 controlled by the new 'undo-auto-amalgamate' function. See the node
470 "Undo" in the ELisp manual for more details.
473 *** The heuristic used to insert 'undo-boundary' after each command
474 has changed, so that if a command causes changes in more than just the
475 current buffer, Emacs now calls 'undo-boundary' in every buffer
476 affected by the command.
479 ** New command 'comment-line' bound to 'C-x C-;'.
481 ** New and improved facilities for inserting Unicode characters
484 *** Unicode names entered via C-x 8 RET now use substring completion by default.
487 *** C-x 8 now has shorthands for several chars, such as U+2010
488 (HYPHEN), U+2011 (NON-BREAKING HYPHEN), and U+2012 (FIGURE DASH). As
489 before, you can type C-x 8 C-h to list shorthands.
492 *** New minor mode electric-quote-mode for using curved quotes as you
493 type. See also the new variable 'text-quoting-style'.
496 ** New minor mode global-eldoc-mode is enabled by default.
499 ** Emacs now uses "bracketed paste mode" on text terminals that support it.
500 Bracketed paste mode causes text terminals to wrap pasted text in special
501 escape sequences that allow Emacs to tell the difference between text
502 you type and text you paste from other applications. Emacs then
503 avoids interpreting each character in the pasted text as it does with
504 keyboard input, which results in a paste experience similar to that
505 under a window system, and significant performance improvements when
506 pasting large amounts of text.
508 Bracketed paste mode is disabled by default, so Emacs automatically
509 enables it at startup if the terminal supports it.
512 ** Emacs now supports the latest version of the UBA.
513 The Emacs implementation of the Unicode Bidirectional Algorithm (UBA)
514 was updated to support all the latest additions and changes introduced
515 in Unicode Standard versions 6.3, 7.0, and the latest Unicode 8.0.
516 This includes full support for directional isolates and the
517 Bidirectional Parentheses Algorithm (BPA) specified by these Unicode
521 ** You can access 'mouse-buffer-menu' (C-down-mouse-1) using C-f10.
524 ** New buffer-local 'electric-pair-local-mode'.
527 ** New variable 'fast-but-imprecise-scrolling' inhibits
528 fontification during full screen scrolling operations, giving less
529 hesitant operation during auto-repeat of C-v, M-v at the cost of
530 possible inaccuracies in the end position.
533 ** New documentation command 'describe-symbol'.
534 Works for functions, variables, faces, etc. It is bound to 'C-h o' by
538 ** New function 'custom-prompt-customize-unsaved-options' checks for
539 unsaved customizations and prompts user to customize (if found). It
540 is intended for adding to 'kill-emacs-query-functions'.
543 ** The old 'C-x w' bindings in hi-lock-mode are officially deprecated
544 in favor of the global 'M-s h' bindings introduced in Emacs-23.1.
545 They'll disappear soon.
548 ** New bindings for 'query-replace-map'.
549 'undo', undo the last replacement; bound to 'u'.
550 'undo-all', undo all replacements; bound to 'U'.
553 * Changes in Specialized Modes and Packages in Emacs 25.1
558 *** New command 'checkdoc-package-keywords' checks if the
559 current package keywords are recognized. Set the new option
560 'checkdoc-package-keywords-flag' to non-nil to make
561 'checkdoc-current-buffer' call this function automatically.
564 *** New function 'checkdoc-file' checks for style errors.
565 It's meant for use together with 'compile':
566 emacs -batch --eval "(checkdoc-file \"subr.el\")"
571 *** The desktop format version has been upgraded from 206 to 208.
572 Although Emacs 25.1 can read a version 206 desktop, earlier Emacsen
573 cannot read a version 208 desktop. To upgrade your desktop file, you
574 must explicitly request the upgrade, by C-u M-x desktop-save. You are
575 recommended to do this as soon as you have firmly upgraded to Emacs
576 25.1 (or later). Should you ever need to downgrade your desktop file
577 to version 206, you can do this with C-u C-u M-x desktop-save.
580 ** New function 'bookmark-set-no-overwrite' bound to C-x r M.
581 It raises an error if a bookmark of that name already exists,
582 unlike 'bookmark-set' which silently updates an existing bookmark.
587 *** New user options 'mm-html-inhibit-images' and 'mm-html-blocked-images'
588 now control how mm-* functions fetch and display images in an HTML
589 message. Gnus still uses 'gnus-inhibit-images' and 'gnus-blocked-images'
590 for that purpose, i.e., binds mm-html- variables with those gnus-
591 variables, but other packages do not have to bind gnus- variables now.
594 *** 'mm-inline-text-html-with-images' has been removed.
595 Use 'mm-html-inhibit-images' instead. Note that the value is opposite
601 *** 'imap-ssl-program' has been removed, and imap.el uses the internal
602 GnuTLS encryption functions if possible.
607 *** 'json-pretty-print' and 'json-pretty-print-buffer' now maintain
608 the ordering of object keys by default.
611 *** New commands 'json-pretty-print-ordered' and
612 'json-pretty-print-buffer-ordered' pretty prints JSON objects with
613 object keys sorted alphabetically.
616 ** Prog mode has some support for multi-mode indentation.
617 This allows better indentation support in modes that support multiple
618 programming languages in the same buffer, like literate programming
619 environments or ANTLR programs with embedded Python code.
621 A major mode can provide indentation context for a sub-mode through
622 the 'prog-indentation-context' variable. To support this, modes that
623 provide indentation should use 'prog-widen' instead of 'widen' and
624 'prog-first-column' instead of a literal zero. See the node
625 "Mode-Specific Indent" in the ELisp manual for more details.
627 ** Prettify Symbols mode
630 *** Prettify Symbols mode supports custom composition predicates. By
631 overriding the default 'prettify-symbols-compose-predicate', modes can
632 specify in which contexts a symbol may be displayed as some Unicode
633 character. 'prettify-symbols-default-compose-p' is the default which
634 is suitable for most programming languages such as C or Lisp (but not
638 *** Symbols can be unprettified while point is inside them.
639 New variable 'prettify-symbols-unprettify-at-point' configures this.
641 ** Enhanced xterm support
644 *** The new variable 'xterm-screen-extra-capabilities' for configuring xterm.
645 This variable tells Emacs which advanced capabilities are available in
646 the xterm terminal emulator used to display Emacs text-mode frames.
647 The default is to check each capability, and use it if available.
648 (This variable was introduced in Emacs 24.1, but was not announced in
652 *** Killing text now also sets the CLIPBOARD/PRIMARY selection
653 in the surrounding GUI (using the OSC-52 escape sequence). This only works
654 if your xterm supports it and enables the 'allowWindowOps' options (disabled
655 by default at least in Debian, for security reasons).
657 Similarly, you can yank the CLIPBOARD/PRIMARY selection (using the OSC-52
658 escape sequence) if your xterm has the feature enabled but for that you
659 additionally need to add 'getSelection' to 'xterm-extra-capabilities'.
662 *** 'xterm-mouse-mode' now supports mouse-tracking (if your xterm supports it).
665 ** The way to turn on and off 'save-place' mode has changed.
666 It is no longer sufficient to load the saveplace library and set
667 'save-place' non-nil. Instead, use the two new minor modes:
668 'save-place-mode' turns on saving last place in every file, and
669 'save-place-local-mode' does that only for the file in whose buffer it
670 is invoked. The 'save-place' variable is now an obsolete alias for
671 'save-place-mode', which replaces it, and 'toggle-save-place' is an
672 obsolete alias for the new 'save-place-local-mode' command.
677 *** ERC can now hide message types by network or channel.
678 'erc-hide-list' will hide all messages of the specified type, while
679 'erc-network-hide-list' and 'erc-channel-hide-list' will only hide the
680 specified message types for the respective specified targets.
682 *** New variable 'erc-default-port-tls' used to connect to TLS IRC
686 *** Reconnection is now asynchronous.
689 *** Nick completion is now case-insensitive again after inadvertently
690 being made case-sensitive in Emacs 24.2.
695 *** New commands, key binds, and menu items.
697 **** '<' and '>' for navigating previous and next tracks in playlist
699 **** New play/pause command 'mpc-toggle-play' bound to 's'
701 **** 'g' bound to new command 'mpc-seek-current' will navigate current
704 **** New commands 'mpc-toggle-{consume,repeat,single,shuffle}' for
705 toggling playback modes.
708 *** Now supports connecting to a UNIX domain socket.
711 *** Looks at more image file names to use as album art.
712 Case-insensitively tries for .folder.png (freedesktop) and folder.jpg
713 (XP) in addition to cover.jpg.
716 *** Searches in more locations for MPD configuration files.
717 MPD supports the XDG base directory specification since version 0.17.6.
722 *** 'midnight-mode' is now a proper minor mode.
725 *** clean-buffer-*-regexps can now specify buffers via predicate functions.
730 *** New "external" package status.
731 An external package is any installed package that's not built-in and
732 not from 'package-user-dir', which usually means it's from an entry in
733 'package-directory-list'. They are treated much like built-in
734 packages, in that they cannot be deleted through the package menu and
735 are not considered for upgrades.
737 The effect is that a user can manually place a specific version of a
738 package inside 'package-directory-list' and the package menu will
742 *** If a package is available on multiple archives and one has higher
743 priority (as per 'package-archive-priorities') only that one is
744 listed. This can be configured with 'package-menu-hide-low-priority'.
747 *** 'package-menu-toggle-hiding' now toggles the hiding of packages.
748 This includes the above-mentioned low-priority packages, as well as
749 available packages whose version is lower than the currently installed
750 version (which were previously impossible to display).
751 This allows users to downgrade a package if a lower version is
755 *** When filtering the package menu, keywords starting with "arc:" or
756 "status:" represent package archive or status, respectively, instead
760 *** Most functions which involve downloading information now take an
761 ASYNC argument. If it is non-nil, package.el performs the download(s)
765 *** New variable 'package-menu-async' controls whether the
766 package-menu uses asynchronous downloads.
769 *** 'package-install-from-buffer' and 'package-install-file' work on directories.
770 This follows the same rules as installing from a .tar file, except the
771 -pkg file is optional.
774 *** Packages which are dependencies of other packages cannot be deleted.
775 The FORCE argument to 'package-delete' overrides this.
778 *** New custom variable 'package-selected-packages' tracks packages
779 which were installed by the user (as opposed to installed as
780 dependencies). This variable can also be manually customized.
783 *** New command 'package-install-selected-packages' installs all
784 packages from 'package-selected-packages' which are currently missing.
787 *** 'package-install' function now takes a DONT-SELECT argument. If
788 this function is called interactively or if DONT-SELECT is nil, add the
789 package being installed to 'package-selected-packages'.
792 *** New command 'package-autoremove' removes all packages which were
793 installed strictly as dependencies but are no longer needed.
798 When you invoke 'shell' interactively, the *shell* buffer will now
799 display in a new window. However, you can customize this behavior via
800 the 'display-buffer-alist' variable. For example, to get
801 the old behavior -- *shell* buffer displays in current window -- use
802 (add-to-list 'display-buffer-alist
803 '("^\\*shell\\*$" . (display-buffer-same-window))).
807 *** The ':protection' slot option is not obeyed any more.
809 *** The 'newname' argument to constructors is optional&deprecated.
810 If you need your objects to be named, do it by inheriting from 'eieio-named'.
812 *** The <class>-list-p and <class>-child-p functions are declared obsolete.
814 *** The <class> variables are declared obsolete.
816 *** The <initarg> variables are declared obsolete.
818 *** defgeneric and defmethod are declared obsolete.
819 Use the equivalent facilities from cl-generic.el instead.
821 *** 'constructor' is now an obsolete alias for 'make-instance'.
822 --- 'pcase' accepts a new UPattern 'eieio'.
827 *** New command 'ido-bury-buffer-at-head' bound to C-S-b
828 Bury the buffer at the head of 'ido-matches', analogous to how C-k
829 kills the buffer at head.
832 *** A prefix argument to 'ido-restrict-to-matches' will reverse its
833 meaning, and the list is restricted to those elements that do not
834 match the current input.
839 *** You can use <UP> and <DOWN> arrow keys to move through history by lines.
840 The new commands 'next-line-or-history-element' and
841 'previous-line-or-history-element', bound to <UP> and <DOWN> in the
842 minibuffer, allow by-line movement through minibuffer history,
843 similarly to an ordinary buffer. Only when point moves over
844 the bottom/top of the minibuffer it goes to the next/previous history
845 element. 'M-p' and 'M-n' still move directly to previous/next history
848 ** Search and Replace
851 *** 'isearch' and 'query-replace' can now perform character folding in matches.
852 This is analogous to case folding, but instead of disregarding case
853 variants, it disregards wider classes of distinctions between similar
854 characters. (Case folding is a special case of character folding.)
855 This means many characters in the search string will match entire
856 groups of characters instead of just themselves.
858 For instance, the ASCII double quote character " will match all
859 variants of double quotes, and the letter 'a' will match all of its
860 accented cousins, even those composed of multiple characters, as well
861 as many other symbols like U+249C (PARENTHESIZED LATIN SMALL LETTER
864 Character folding is enabled by customizing 'search-default-mode' to
865 the value 'character-fold-to-regexp'. You can also toggle character
866 folding in the middle of a search by typing 'M-s ''.
868 'query-replace' honors character folding if the new variable
869 'replace-character-fold' is customized to a non-nil value.
872 *** New user option 'search-default-mode'.
873 This option specifies the default mode for Isearch. The default
874 value, nil specifies that Isearch does literal searches (however,
875 'case-fold-search' and 'isearch-lax-whitespace' may still be applied,
876 as in previous Emacs versions).
879 *** New function 'character-fold-to-regexp' can be used
880 by searching commands to produce a regexp matching anything that
881 character-folds into STRING.
884 *** The new M-s M-w key binding uses eww to search the web for the
885 text in the region. The search engine to use for this is specified by
886 the customizable variable 'eww-search-prefix'.
889 *** Query-replace history is enhanced.
890 When query-replace reads the FROM string from the minibuffer, typing
891 'M-p' will now show previous replacements as "FROM SEP TO", where FROM
892 and TO are the original text and its replacement, and SEP is an arrow
893 string defined by the new variable 'query-replace-from-to-separator'.
894 To select a prior replacement, type 'M-p' until the desired
895 replacement appears in the minibuffer, and then exit the minibuffer by
900 *** If 'quick-calc' is called with a prefix argument, insert the
901 result of the calculation into the current buffer.
904 ** In Edebug, you can now set the initial mode with C-x C-a C-m. With
905 this you can tell Edebug not to stop at the start of the first
906 instrumented function.
911 *** New minor mode 'global-eldoc-mode'
912 It is turned on by default, and affects '*scratch*' and other buffers
913 whose major mode supports Emacs Lisp.
916 *** 'eldoc-documentation-function' now defaults to 'ignore'
919 *** 'describe-char-eldoc' displays information about character at point,
920 and can be used as a default value of 'eldoc-documentation-function'. It is
921 useful when, for example, one needs to distinguish various spaces - e.g.,
922 U+00A0 (NO-BREAK SPACE), U+2002 (EN SPACE), and U+2009 (THIN SPACE) - while
923 using mono-spaced font.
928 *** HTML can now be rendered using variable-width fonts.
931 *** A new command 'F' ('eww-toggle-fonts') can be used to toggle
932 whether to use variable-pitch fonts or not. The user can also
933 customize the 'shr-use-fonts' variable.
936 *** A new command 'C' ('eww-toggle-colors') can be used to toggle
937 whether to use the HTML-specified colors or not. The user can also
938 customize the 'shr-use-colors' variable.
941 *** A new command 'R' ('eww-readable') will try do identify the main
942 textual parts of a web page and display only that, leaving menus and
943 the like off the page.
946 *** A new command 'D' ('eww-toggle-paragraph-direction') allows you to
947 toggle the paragraph direction between left-to-right and right-to-left.
950 *** Images that are being loaded are now marked with grey
951 "placeholder" images of the size specified by the HTML. They are then
952 replaced by the real images asynchronously, which will also now
953 respect width/height HTML specs (unless they specify widths/heights
954 bigger than the current window).
957 *** You can now use several eww buffers in parallel by renaming eww
958 buffers you want to keep separate.
961 *** Partial state of the eww buffers (the URIs and the titles of the
962 pages visited) is now preserved in the desktop file.
965 *** 'eww-after-render-hook' is now called after eww has rendered
966 the data in the buffer.
969 *** The 'eww-reload' command now takes a prefix to not reload via
970 the net, but just use the local copy of the HTML.
973 *** The DOM shr and eww uses has been changed to the general Emacs
974 xml.el/libxml2 DOM, and a new package dom.el has been added to
975 interact with this DOM. See the Emacs Lisp manual for interface
979 *** 'mailcap-mime-data' is now consulted when displaying PDF files.
982 *** The new 'S' command will list all eww buffers, and allow managing
986 *** https pages with valid certificates have headers marked in green, while
987 invalid certificates are marked in red.
992 *** text/html messages that contain inline image parts will be
993 transformed into multipart/related messages before sending.
996 *** The 'message-valid-fqdn-regexp' variable has been removed, since
997 there are now top-level domains added all the time. Message will no
998 longer warn about sending emails to top-level domains it hasn't heard
1001 *** 'message-beginning-of-line' (bound to C-a) understands folded headers.
1002 In 'visual-line-mode' it will look for the true beginning of a header
1003 while in non-'visual-line-mode' it will move the point to the indented
1007 ** In Show Paren Mode, a parenthesis can be highlighted when point
1008 stands inside it, and certain parens can be highlighted when point is
1009 at BOL or EOL, or in whitespace there. To enable these, customize,
1010 respectively, 'show-paren-when-point-inside-paren' or
1011 'show-paren-when-point-in-periphery'.
1014 ** If gpg2 exists on the system, it is now used as the default value
1015 of 'epg-gpg-program' (instead of gpg).
1020 *** Images are automatically scaled before displaying based on the
1021 'image-scaling-factor' variable (if Emacs supports scaling the images
1025 *** Images inserted with 'insert-image' and related functions get a
1026 keymap put into the text properties (or overlays) that span the
1027 image. This keymap binds keystrokes for manipulating size and
1028 rotation, as well as saving the image to a file. These commands are
1029 also available in 'image-mode'.
1032 *** A new library for creating and manipulating SVG images has been
1033 added. See the "SVG Images" section in the lispref manual for
1037 *** New setf-able function to access and set image parameters is
1038 provided: 'image-property'.
1044 *** Strings after ':documentation' are highlighted as docstrings.
1045 This enhances Lisp mode fontification to handle documentation of the
1046 form '(:documentation "the doc string")' used in Common Lisp code for
1047 CLOS class and slot documentation.
1049 ** Rectangle editing
1052 *** Rectangle Mark mode can have corners past EOL or in the middle of a TAB.
1055 *** C-x C-x in rectangle-mark-mode now cycles through the four corners.
1056 *** 'string-rectangle' provides on-the-fly preview of the result.
1059 ** New font-lock functions 'font-lock-ensure' and 'font-lock-flush'.
1060 These should be used in preference to 'font-lock-fontify-buffer' when
1064 ** Macro 'minibuffer-with-setup-hook' can optionally append a function
1065 to 'minibuffer-setup-hook'.
1067 If the first argument of the macro is of the form '(:append FUN)',
1068 then FUN will be appended to 'minibuffer-setup-hook', instead of
1073 *** New functions 'cl-fresh-line', 'cl-digit-char-p', and 'cl-parse-integer'.
1076 *** 'pcase' accepts the new UPattern 'cl-struct'.
1078 ** Calendar and diary
1081 *** The default 'diary-file' is now located in .emacs.d.
1084 *** New commands to insert diary entries with Chinese dates:
1085 'diary-chinese-insert-anniversary-entry' 'diary-chinese-insert-entry'
1086 'diary-chinese-insert-monthly-entry', 'diary-chinese-insert-yearly-entry'.
1089 *** The calendar can now list and mark diary entries with Chinese dates.
1090 See 'diary-chinese-list-entries' and 'diary-chinese-mark-entries'.
1093 *** The option 'calendar-mode-line-format' can now be nil,
1094 which means to do nothing special with the mode line in calendars.
1097 *** New option 'calendar-weekend-days'.
1098 The option customizes which day headers receive the
1099 'calendar-weekend-header' face.
1102 *** New optional args N and STRING for 'holiday-greek-orthodox-easter'.
1105 *** Many items obsolete since at least version 23.1 have been removed.
1106 The majority were function/variable/face aliases, too numerous to list here.
1109 **** Functions 'calendar-one-frame-setup', 'calendar-only-one-frame-setup',
1110 'calendar-two-frame-setup', 'european-calendar', 'american-calendar'.
1112 **** Hooks 'cal-menu-load-hook', 'cal-x-load-hook'.
1114 **** Macro 'calendar-for-loop'.
1116 **** Variables 'european-calendar-style', 'diary-face', 'hebrew-holidays-{1,4}'.
1118 **** The nil and list forms of 'diary-display-function'.
1121 ** New ERT function 'ert-summarize-tests-batch-and-exit'.
1122 If the output of ERT tests in batch mode execution can be saved to a
1123 log file, then it can be passed as an argument to the above function
1124 to produce a neat summary.
1127 ** New js.el option 'js-indent-first-init'.
1132 ** Info mode now displays symbol names in fixed-pitch font.
1133 If you want to get the old behavior back, customize the 'Info-quoted'
1134 face to use the same definitions as the default face.
1137 *** 'Info-fontify-maximum-menu-size' can be t for no limit.
1140 *** 'info-display-manual' can now be given a prefix argument which (any
1141 non-nil value) directs the command to limit the completion
1142 alternatives to currently visited manuals.
1145 ** ntlm.el has support for NTLM2.
1150 *** The Rmail commands 'd', 'C-d' and 'u' take optional repeat counts
1151 to delete or undelete multiple messages.
1154 *** Rmail can now render HTML mail messages if your Emacs was built with
1155 libxml2 or if you have the Lynx browser installed. By default, Rmail
1156 will display the HTML version of a mail message that has both HTML and
1157 plain text parts, if display of HTML email is possible; customize the
1158 'rmail-mime-prefer-html' option to 'nil' if you don't want that.
1161 *** In the commands that make summaries by subject, recipients, or senders,
1162 you can no longer use commas to separate regular expressions.
1165 ** SES now supports local printer functions; see 'ses-define-local-printer'.
1167 ** Shell-script Mode
1169 *** In sh-mode you can now use 'sh-shell' as a file-local variable to
1170 specify the type of shell in use (bash, csh, etc).
1173 *** New value 'always' for 'sh-indent-after-continuation'.
1174 This provides old-style ("dumb") indentation of continued lines.
1175 See the doc string of 'sh-indent-after-continuation' for details.
1179 *** Fatal TLS errors are now silent by default.
1182 *** If Emacs isn't built with TLS support, an external TLS-capable
1183 program is used instead. This program used to be run in --insecure
1184 mode by default, but has now changed to be secure instead, and will
1185 fail if you try to connect to non-verifiable hosts. This is
1186 controlled by the 'tls-program' variable.
1191 *** The URL package accepts now the protocols "ssh", "scp" and "rsync".
1192 When 'url-handler-mode' is enabled, file operations for these
1193 protocols as well as for "telnet" and "ftp" are passed to Tramp.
1196 *** The URL package allows customizing the 'url-user-agent' string.
1197 The new 'url-user-agent' variable can be customized to be a string or
1201 *** The new interface variable 'url-request-noninteractive' can be used
1202 to specify that we're running in a noninteractive context, and that
1203 we should not be queried about things like TLS certificate validity.
1206 *** 'url-mime-accept-string' can now be used as in "interface"
1207 variable, meaning you can bind it around an 'url-retrieve' call.
1210 *** If URL is used with a https connection, the first callback argument
1211 plist will contain a :peer element that has the output of
1212 'gnutls-peer-status' (if Emacs is built with GnuTLS support).
1215 *** The new function 'url-cookie-delete-cookie' can be used to
1216 programmatically delete all cookies, or cookies from a specific
1222 *** New connection method "afp", which allows you to access Mac OS X
1223 volumes via the Apple Filing Protocol.
1226 *** New connection method "nc", which allows you to access dumb
1230 *** Method-specific parameters can be overwritten now with variable
1231 'tramp-connection-properties'.
1234 *** Handler for 'file-notify-valid-p' for remote machines that support
1235 filesystem notifications.
1240 *** New user variable 'sql-default-directory' enables remote
1241 connections using Tramp.
1244 *** New command 'sql-send-line-and-next'.
1245 This command, bound to 'C-c C-n' by default, sends the current line to
1246 the SQL process and advances to the next line, skipping whitespace and
1250 *** Added support for Vertica SQL.
1252 ** VC and related modes
1255 *** Basic push support, via 'vc-push', bound to 'C-x v P'.
1256 Implemented for Bzr, Git, Hg. As part of this change, the pre-existing
1257 (undocumented) command vc-hg-push now behaves slightly differently.
1260 *** The new command vc-region-history shows the log+diff of the active region.
1263 *** You can refresh the VC state of a file buffer with 'M-x vc-refresh-state'.
1264 This command is useful when you perform version control commands
1265 outside Emacs (e.g., from the shell prompt), or if you switch the VC
1266 back-end for the buffer's file, or remove it from version control.
1269 *** The VC state indicator in the mode line now defaults to more
1270 colorful faces to make it more obvious to the user what the state is.
1271 See the 'vc-faces' customization group.
1274 *** New option 'vc-annotate-background-mode' controls whether
1275 the color range from 'vc-annotate-color-map' is applied to the
1276 background or to the foreground.
1279 *** 'compare-windows' now compares text with the most recently selected window
1280 instead of the next window. If you want the previous behavior of
1281 comparing with the next window, customize the new option
1282 'compare-windows-get-window-function' to the value
1283 'compare-windows-get-next-window'.
1286 *** Two new faces 'compare-windows-removed' and 'compare-windows-added'
1287 replace the face 'compare-windows', which is now an obsolete alias for
1288 'compare-windows-added'.
1291 *** The VC state indicator in the mode line now has different faces
1292 corresponding to each of the possible states. See the 'vc-faces'
1293 customization group.
1296 *** 'log-edit-insert-changelog' converts "(tiny change)" to
1297 "Copyright-paperwork-exempt: yes". Set 'log-edit-rewrite-tiny-change'
1298 nil to disable this.
1301 ** VHDL mode now supports VHDL'08.
1306 *** Decimal display mode uses "," groups, so it's more
1307 fitting for use in money calculations
1310 *** Factorial works with non-integer inputs.
1315 *** Hide-IfDef mode now support full C/C++ expressions in macros,
1316 macro argument expansion, interactive macro evaluation and automatic
1317 scanning of #define'd symbols.
1320 *** New command 'hif-evaluate-macro', bound to 'C-c @ e', displays the
1321 result of evaluating a macro.
1324 *** New command 'hif-clear-all-ifdef-define', bound to 'C-c @ C', clears
1325 all defined symbols in 'hide-ifdef-env'.
1328 *** New custom variable 'hide-ifdef-header-regexp' to define C/C++ header
1329 file name patterns. Defaults to files whose extension is one of '.h',
1330 '.hh', '.hpp', '.hxx', or '.h++', matched case-insensitively.
1333 *** New custom variable 'hide-ifdef-expand-reinclusion-protection' to prevent
1334 reinclusion protected (a.k.a. "idempotent") header files from being hidden.
1335 (This could happen when an idempotent header file is visited again,
1336 when its guard symbol is already defined.) Defaults to 't'.
1339 *** New custom variable 'hide-ifdef-exclude-define-regexp' to define symbol
1340 name patterns (e.g. all "FOR_DOXYGEN_ONLY_*") to be ignored when
1341 looking for macro definitions. By default, no symbols are ignored.
1346 *** New custom variable 'tex-print-file-extension' to help users who
1347 use PDF instead of DVI.
1350 *** TeX mode now supports Prettify Symbols mode. When enabling
1351 'prettify-symbols-mode' in a tex-mode buffer, \alpha ... \omega, and
1352 many other math macros are displayed using unicode characters.
1355 ** New 'big-indent' style in 'whitespace-mode' highlights deep indentation.
1356 By default, 32 consecutive spaces or four consecutive TABs are
1357 considered to be too deep, but the new variable
1358 'whitespace-big-indent-regexp' can be customized to change that.
1361 ** New options in 'tildify-mode'.
1362 New options 'tildify-space-string', 'tildify-pattern', and
1363 'tildify-foreach-region-function' variables make
1364 'tildify-string-alist', 'tildify-pattern-alist', and
1365 'tildify-ignored-environments-alist' variables (as well as a few
1366 helper functions) obsolete.
1369 ** New package Xref replaces Etags's front-end and UI
1371 The new package Xref provides a generic framework and new commands to
1372 find and move to definitions of functions, macros, data structures
1373 etc., as well as go back to the location where you were before moving
1374 to a definition. It supersedes and obsoletes many Etags commands,
1375 while still using the etags.el code that reads the TAGS tables as one
1378 The command 'xref-find-definitions' replaces 'find-tag' and provides
1379 an interface to pick one definition among several.
1380 'tags-loop-continue' is now unbound. 'xref-pop-marker-stack' replaces
1381 'pop-tag-mark', but has a keybinding ('M-,') different from the one
1382 'pop-tag-mark' used.
1384 'xref-find-definitions-other-window' replaces 'find-tag-other-window'.
1385 'xref-find-definitions-other-frame' replaces 'find-tag-other-frame'.
1386 'xref-find-apropos' replaces 'find-tag-regexp'.
1388 As a result of this, the following commands are now obsolete:
1389 'find-tag-other-window', 'find-tag-other-frame', 'find-tag-regexp',
1392 'tags-loop-continue' is not obsolete because it's still useful in
1393 'tags-search' and 'tags-query-replace', for which there are no direct
1397 *** Variants of 'tags-search' and 'tags-query-replace' in Dired were also
1398 replaced by xref-style commands, see the "Dired" section below.
1403 'find-tag-marker-ring-length' is now an obsolete alias for
1404 'xref-marker-ring-length'. 'find-tag-marker-ring' is now an obsolete
1405 alias for a private variable. 'xref-push-marker-stack' and
1406 'xref-pop-marker-stack' should be used instead to manipulate the stack
1407 of searches for definitions.
1410 *** 'xref-find-definitions' and 'describe-function' now display
1411 information about mode local overrides (defined by cedet/mode-local.el
1412 'define-overloadable-function' 'define-mode-local-overrides').
1414 The framework's Lisp API is still experimental and can change in major,
1415 backward-incompatible ways.
1418 ** New package Project
1420 The new package Project provides generic infrastructure for dealing
1421 with projects. The main commands included in it are
1422 'project-find-file' and 'project-find-regexp'.
1424 The Lisp API of this package is still experimental.
1427 EUDC's LDAP backend has been improved.
1430 *** EUDC supports LDAP-over-SSL URLs (ldaps://).
1433 *** EUDC passes LDAP passwords through a pipe to the ldapsearch
1434 subprocess instead of on the command line.
1437 *** EUDC handles LDAP wildcards automatically so the user shouldn't
1438 need to configure this manually anymore.
1441 *** The LDAP configuration section of EUDC's manual has been
1444 There have also been customization changes.
1447 *** New custom variable 'eudc-server-hotlist' to allow specifying
1448 multiple EUDC servers in init file.
1451 *** Custom variable 'eudc-inline-query-format' defaults to completing
1452 on email and firstname instead of surname.
1455 *** Custom variable 'eudc-expansion-overwrites-query' defaults to nil
1456 to avoid interfering with the kill ring.
1459 *** Custom variable 'eudc-inline-expansion-format' defaults to
1460 "Firstname Surname <mail-address>".
1463 *** Custom variable 'eudc-options-file' defaults to
1464 "~/.emacs.d/eudc-options".
1467 *** New custom variable 'ldap-ldapsearch-password-prompt-regexp' to
1468 allow overriding the regular expression that recognizes the ldapsearch
1469 command line's password prompt.
1472 EUDC's BBDB backend now supports BBDB 3.
1475 EUDC's PH backend (eudcb-ph.el) is obsolete.
1480 *** The new built-in command 'clear' can scroll window contents out of sight.
1481 If provided with an optional non-nil argument, the scrollback contents will be cleared.
1484 *** New buffer syntax '#<buffer-name>', which is equivalent to
1485 '#<buffer buffer-name>'. This shorthand makes interacting with
1486 buffers from eshell more convenient. Custom variable
1487 'eshell-buffer-shorthand', which has been broken for a while, has been
1491 *** By default, eshell "visual" program buffers (created by
1492 'eshell-visual-commands' and similar custom vars) are no longer killed
1493 when their processes die. This fixes issues with short-lived commands
1494 and makes visual programs more useful in general. For example, if
1495 "git log" is a visual command, it will always show the visual command
1496 buffer, even if the "git log" process dies. For the old behavior,
1497 make the new option 'eshell-destroy-buffer-when-process-dies' non-nil.
1502 *** Support for the Google Chrome web browser.
1505 *** Support for the Conkeror web browser.
1508 *** Support for several ancient browsers is now officially obsolete.
1511 ** tar-mode: new 'tar-new-entry' command, allowing for new members to
1512 be added to the archive.
1517 *** Dired buffers are also auto-reverted via file notifications, if
1518 Emacs is compiled with file notification support.
1521 *** 'auto-revert-use-notify' is set to nil in 'global-auto-revert-mode'.
1522 See <http://debbugs.gnu.org/22814>.
1524 ** File Notifications
1527 *** The kqueue library is integrated for *BSD and Mac OS X machines.
1530 *** The new event 'stopped' signals, that a file notification watch is
1531 not active any longer.
1534 *** The new function 'file-notify-valid-p' checks, whether a file
1535 notification descriptor still corresponds to an activate watch.
1540 *** The command 'dired-do-compress' bound to 'Z' now can compress
1541 directories and decompress zip files.
1544 *** New command 'dired-do-compress-to' bound to 'c' can be used to
1545 compress many marked files into a single named archive. The
1546 compression command is determined from the new
1547 'dired-compress-files-alist' variable.
1550 *** In wdired, when editing files to contain slash characters,
1551 the resulting directories are automatically created. Whether
1552 to do this or not is controlled by the
1553 'wdired-create-parent-directories' variable.
1556 *** 'W' is now bound to 'browse-url-of-dired-file', and is useful for
1557 viewing HTML files and the like.
1559 *** New user interface for the 'A' and 'Q' commands.
1560 These keys, now bound to 'dired-do-find-regexp' and
1561 'dired-do-find-regexp-and-replace', work similarly to 'xref-find-apropos'
1562 and 'xref-query-replace-in-results': they present the matches
1563 in the '*xref*' buffer and let you move through the matches. No need
1564 to use 'tags-loop-continue' to resume the search or replace loop. The
1565 previous commands, 'dired-do-search' and
1566 'dired-do-query-replace-regexp', are still available, but not bound to
1567 keys; rebind 'A' and 'Q' to invoke them if you want the old behavior
1568 back. We intend to obsolete the old commands in a future release.
1570 ** Tabulated List Mode
1573 *** It is now safe for a mode that derives 'tabulated-list-mode' to not
1574 call 'tabulated-list-init-header', in which case it will have no
1578 *** 'tabulated-list-print' takes a second optional argument, update,
1579 which specifies an alternative printing method which is faster when
1580 few or no entries have changed.
1582 ** Obsolete packages
1588 *** landmark.el (moved to elpa.gnu.org)
1591 * New Modes and Packages in Emacs 25.1
1594 ** pinentry.el allows GnuPG passphrase to be prompted through the
1595 minibuffer instead of a graphical dialog, depending on whether the gpg
1596 command is called from Emacs (i.e., INSIDE_EMACS environment variable
1597 is set). This feature requires newer versions of GnuPG (2.1.5 or
1598 later) and Pinentry (0.9.5 or later). To use this feature, add
1599 "allow-emacs-pinentry" to "~/.gnupg/gpg-agent.conf" and reload the
1600 configuration with "gpgconf --reload gpg-agent".
1603 ** cl-generic.el provides CLOS-style multiple-dispatch generic functions.
1604 The main entry points are 'cl-defgeneric' and 'cl-defmethod'. See the
1605 node "Generic Functions" in the Emacs Lisp manual for more details.
1608 ** scss-mode (a minor variant of css-mode) is a major mode for editing
1609 SCSS (Sassy CSS) files.
1612 ** let-alist is a new macro (and a package) that allows one to easily
1613 let-bind the values stored in an alist.
1616 ** 'tildify-mode' allows automatic insertion of hard spaces as one
1617 types the text. Breaking line after a single-character words is
1618 forbidden by Czech and Polish typography (and may be discouraged in
1619 other languages), so 'auto-tildify-mode' makes it easier to create
1620 a typographically-correct documents.
1623 ** The 'seq' library adds sequence manipulation functions and macros
1624 that complement basic functions provided by subr.el. All functions
1625 are prefixed with 'seq-' and work on lists, strings and vectors.
1626 'pcase' accepts a new Upattern 'seq'.
1629 ** The 'map' library provides map-manipulation functions that work on
1630 alists, hash-table and arrays. All functions are prefixed with
1631 'map-'. 'pcase' accepts a new UPattern 'map'.
1634 ** The 'thunk' library provides functions and macros to control the
1635 evaluation of forms.
1638 ** js-jsx-mode (a minor variant of js-mode) provides indentation
1639 support for JSX, an XML-like syntax extension to ECMAScript.
1642 * Incompatible Lisp Changes in Emacs 25.1
1645 ** 'setq' and 'setf' must now be called with an even number of
1646 arguments. The earlier behavior of silently supplying a nil to the
1647 last variable when there was an odd number of arguments has been
1651 ** 'syntax-begin-function' is declared obsolete.
1652 Removed font-lock-beginning-of-syntax-function and the SYNTAX-BEGIN
1653 slot in font-lock-defaults.
1656 ** The new implementation of Subword mode affects word movement everywhere.
1657 When Subword mode is turned on, 'forward-word', 'backward-word', and
1658 everything that uses them will move by sub-words, effectively
1659 overriding the buffer's syntax table. Lisp programs that shouldn't be
1660 affected by Subword mode should call the new functions
1661 'forward-word-strictly' and 'backward-word-strictly' instead.
1664 ** 'package-initialize' now sets 'package-enable-at-startup' to nil if
1665 called during startup. Users who call this function in their init
1666 file and still expect it to be run after startup should set
1667 'package-enable-at-startup' to t after the call to
1668 'package-initialize'.
1671 ** ':global' minor mode use 'setq-default' rather than 'setq'.
1672 This means that you can't use 'make-local-variable' and expect them to
1673 "magically" become buffer-local.
1676 ** 'track-mouse' no longer freezes the shape of the mouse pointer.
1677 The 'track-mouse' form no longer refrains from changing the shape of
1678 the mouse pointer for the entire time the body of that form is
1679 executed. Lisp programs that use 'track-mouse' for dragging across
1680 large portions of the Emacs display, and want to avoid changes in the
1681 pointer shape during dragging, should bind the variable 'track-mouse'
1682 to the special value 'dragging' in the body of the form.
1685 ** The optional 'predicate' argument of 'lisp-complete-symbol' no longer
1686 has any effect. (This change was made in Emacs 24.4 but was not
1687 advertised at the time.)
1690 ** 'indirect-function' does not signal 'void-function' any more.
1691 This is mostly a bug-fix, since this change was missed back in 24.4 when
1692 symbol-function was changed not to signal 'void-function' any more.
1695 *** As a consequence, the second arg of 'indirect-function' is now obsolete.
1698 ** Comint, term, and compile do not set the EMACS env var any more.
1699 Use the INSIDE_EMACS environment variable instead.
1701 ** 'C-up', 'C-down', 'C-left' and 'C-right' are now defined in term
1702 mode to send the same escape sequences that xterm does. This makes
1703 things like forward-word in readline work.
1706 ** hideshow mode got four key bindings that are analogous to outline
1707 mode bindings: 'C-c @ C-a', 'C-c @ C-t', 'C-c @ C-d', and 'C-c @ C-e.'
1710 ** 'save-excursion' does not save&restore the mark any more.
1711 Use 'save-mark-and-excursion' if you want the old behavior.
1714 ** 'read-buffer' and 'read-buffer-function' can now be called with a 4th
1715 argument ('predicate').
1718 ** 'completion-table-dynamic' by default stays in the minibuffer.
1719 The minibuffer will be the current buffer when the function is called.
1720 If you want the old behavior of calling the function in the buffer
1721 from which the minibuffer was entered, use the new argument
1722 'switch-buffer' to 'completion-table-dynamic'.
1725 ** window-configurations no longer record the buffers' marks.
1728 ** inhibit-modification-hooks now also inhibits lock-file checks, as well as
1729 active region handling.
1732 ** deactivate-mark is now buffer-local.
1735 ** 'cl-the' now asserts that its argument is of the given type.
1738 ** 'process-running-child-p' may now return a numeric process
1739 group ID instead of 't'.
1742 ** Mouse click events on mode line or header line no longer include
1743 any reference to a buffer position. The 6th member of the mouse
1744 position list returned for such events is now nil.
1747 ** Menu items in keymaps do not support the "key shortcut cache" any more.
1748 These slots used to hold key-shortcut data, but have been obsolete since
1752 ** Emacs no longer downcases the first letter of a system diagnostic
1753 when signaling a file error. For example, it now reports "Permission
1754 denied" instead of "permission denied". The old behavior was problematic
1755 in languages like German where downcasing rules depend on grammar.
1758 ** New variable 'text-quoting-style' to control how Emacs translates quotes.
1759 Set it to 'curve' for curved single quotes, to 'straight' for straight
1760 apostrophes, and to 'grave' for grave accent and apostrophe. The
1761 default value nil acts like 'curve' if curved single quotes are
1762 displayable, and like 'grave' otherwise. The new variable affects
1763 display of diagnostics and help, but not of info.
1766 ** substitute-command-keys now replaces quotes.
1767 That is, it converts documentation strings' quoting style as per the
1768 value of 'text-quoting-style'. Doc strings in source code can use
1769 either curved single quotes or grave accents and apostrophes. As
1770 before, characters preceded by \= are output as-is.
1773 ** Message-issuing functions 'error', 'message', etc. now convert quotes.
1774 They use the new 'format-message' function instead of plain 'format',
1775 so that they now follow user preference as per 'text-quoting-style'
1776 when processing curved single quotes, grave accents, and apostrophes
1777 in their format argument.
1780 ** The character classes [:alpha:] and [:alnum:] in regular expressions
1781 now match multibyte characters using Unicode character properties.
1782 If you want the old behavior where they matched any character with
1783 word syntax, use '\sw' instead.
1786 ** The character classes [:graph:] and [:print:] in regular expressions
1787 no longer match every multibyte character. Instead, Emacs now
1788 consults the Unicode character properties to determine which
1789 characters are graphic or printable. In particular, surrogates and
1790 unassigned codepoints are now rejected. If you want the old behavior,
1791 use [:multibyte:] instead.
1794 ** The 'diff' command uses the unified format now. To restore the old
1795 behavior, set 'diff-switches' to '-c'.
1798 ** 'grep-template' and 'grep-find-template' values don't include the
1799 --color argument anymore. It's added at the <C> place holder position
1800 dynamically. Any third-party code that changes these templates should
1801 be updated accordingly.
1803 ** The grep/rgrep/lgrep functions will now ask about saving files
1804 before running. This is controlled by the 'grep-save-buffers'
1808 ** '(/ N)' is now equivalent to '(/ 1 N)' rather than to '(/ N 1)'.
1809 The new behavior is compatible with Common Lisp and with XEmacs.
1810 This change does not affect Lisp code intended to be portable to
1811 Emacs 24.2 and earlier, which did not support unary '/'.
1814 ** The 'default-directory' value doesn't have to end slash. To make
1815 that happen, 'unhandled-file-name-directory' now defaults to calling
1816 'file-name-as-directory'.
1819 * Lisp Changes in Emacs 25.1
1823 *** New UPatterns 'quote', 'app'.
1825 *** New UPatterns can be defined with 'pcase-defmacro'.
1827 *** New vector QPattern.
1830 ** syntax-propertize is now automatically called on-demand during forward
1831 parsing functions like 'forward-sexp'.
1834 ** New hooks 'prefix-command-echo-keystrokes-functions' and
1835 'prefix-command-preserve-state-hook' allow the definition of prefix
1836 commands other than the predefined 'C-u'.
1839 ** New functions 'filepos-to-bufferpos' and 'bufferpos-to-filepos'.
1840 These allow conversion between buffer positions and the corresponding
1841 file byte offsets, given the file's encoding.
1844 ** The default value of 'load-read-function' is now 'read'.
1845 Previously, the default value of 'nil' implied using 'read'.
1848 ** New hook 'pre-redisplay-functions'.
1849 It is a bit easier to use than 'pre-redisplay-function'.
1852 ** The second arg of 'looking-back' should always be provided explicitly.
1853 Previously, it was an optional argument, now it's mandatory.
1856 ** Text properties 'intangible', 'point-entered', and 'point-left' are obsolete.
1857 Replaced by properties 'cursor-intangible' and 'cursor-sensor-functions',
1858 implemented by the new 'cursor-intangible-mode' and
1859 'cursor-sensor-mode' minor modes.
1862 ** 'inhibit-point-motion-hooks' now defaults to 't' and is obsolete.
1863 Use the new minor modes 'cursor-intangible-mode' and
1864 'cursor-sensor-mode' instead.
1867 ** New process type 'pipe', which can be used in combination with the
1868 ':stderr' keyword of make-process to handle standard error output
1872 ** New function 'make-process' provides an alternative interface to
1873 'start-process'. It allows programs to set process parameters such as
1874 process filter, sentinel, etc., through keyword arguments (similar to
1875 'make-network-process').
1878 ** A new function 'directory-files-recursively' returns all matching
1879 files (recursively) under a directory.
1882 ** New variable 'inhibit-message', when bound to non-nil, inhibits
1883 'message' and related functions from displaying messages in the echo
1884 area. The output is still logged to the *Messages* buffer.
1887 ** A new text property 'inhibit-read-only' can be used in read-only
1888 buffers to allow certain parts of the text to be writable.
1891 ** A new variable 'comment-end-can-be-escaped' is useful in languages
1892 such as C and C++ where line comments with escaped newlines are
1893 continued to the next line.
1896 ** New macro 'define-advice'.
1899 ** Emacs Lisp now supports generators.
1900 See the "Generators" section of the ELisp manual for the details.
1903 ** New finalizer facility for running code when objects become unreachable.
1904 See the "Finalizer Type" subsection in the ELisp manual for the
1908 ** lexical closures can use (:documentation FORM) to build their docstring.
1909 It should be placed right where the docstring would be, and FORM is then
1910 evaluated (and should return a string) when the closure is built.
1913 ** The new command 'fortune-message' has been added, which displays
1914 fortunes in the echo area.
1917 ** define-inline provides a new way to define inlinable functions.
1920 ** New function 'macroexpand-1' to perform a single step of macro expansion.
1923 ** Some "x-*" functions were obsoleted and/or renamed:
1924 *** x-select-text is renamed gui-select-text.
1925 *** x-selection-value is renamed gui-selection-value.
1926 *** x-get-selection is renamed gui-get-selection.
1927 *** x-get-clipboard and x-clipboard-yank are marked obsolete.
1928 *** x-get-selection-value is renamed to gui-get-primary-selection.
1929 *** x-set-selection is renamed to gui-set-selection
1932 ** New function 'string-greaterp', which return the opposite result of
1936 ** The new functions 'string-collate-lessp' and 'string-collate-equalp'
1937 preserve the collation order as defined by the system's locale(1)
1938 environment. For the time being this is implemented for modern POSIX
1939 systems and for MS-Windows, for other systems they fall back to their
1940 counterparts 'string-lessp' and 'string-equal'.
1943 ** The new function 'string-version-lessp' compares strings by
1944 interpreting consecutive runs of numerical characters as numbers, and
1945 compares their numerical values. According to this predicate,
1946 "foo2.png" is smaller than "foo12.png".
1949 *** The ls-lisp package uses 'string-collate-lessp' to sort file names.
1950 The effect is that, on systems that use ls-lisp for Dired, the default
1951 sort order of the files in Dired is now different from what it was in
1952 previous versions of Emacs. In particular, the file names are sorted
1953 disregarding punctuation, accents, and diacritics, and letter case is
1954 ignored. For example, files whose name begin with a period will no
1955 longer appear near the beginning of the directory listing. If you
1956 want the old, locale-independent sorting, customize the new option
1957 'ls-lisp-use-string-collate' to the nil value.
1960 *** The MS-Windows specific variable 'w32-collate-ignore-punctuation',
1961 if set to a non-nil value, causes the above 2 functions to ignore
1962 symbol and punctuation characters when collating strings. This
1963 emulates the behavior of modern Posix platforms when the locale's
1964 codeset is "UTF-8" (as in "en_US.UTF-8"). This is needed because
1965 MS-Windows doesn't support UTF-8 as codeset in its locales.
1968 ** New function 'alist-get', which is also a valid place (aka lvalue).
1971 ** New function 'funcall-interactively', which works like 'funcall'
1972 but makes 'called-interactively-p' treat the function as (you guessed it)
1973 called interactively.
1976 ** New function 'function-put' to use instead of 'put' for function properties.
1979 ** The new function 'bidi-find-overridden-directionality' allows you to
1980 find characters whose directionality was, perhaps maliciously,
1981 overridden by directional override control characters. Lisp programs
1982 can use this to detect potential phishing of URLs and other links that
1983 exploits bidirectional display reordering.
1986 ** The new function 'buffer-substring-with-bidi-context' allows you to
1987 copy a portion of a buffer into a different location while preserving
1988 the visual appearance both of the copied text and the text at
1989 destination, even when the copied text includes mixed bidirectional
1990 text and directional control characters.
1993 ** New properties that can be specified with 'declare':
1994 *** (interactive-only INSTEAD), says to use INSTEAD for non-interactive use.
1995 *** (pure VAL), if VAL is non-nil, indicates the function is pure.
1996 *** (side-effect-free VAL), if VAL is non-nil, indicates the function does not
2000 ** New macro 'with-file-modes', for evaluating expressions with default file
2001 permissions set to temporary values (e.g., for creating private files).
2004 ** You can access the slots of structures using 'cl-struct-slot-value'.
2007 ** Function 'sort' can deal with vectors.
2010 ** Function 'system-name' now returns an updated value if the current
2011 system's name has changed or if the Emacs process has changed systems,
2012 and to avoid long waits it no longer consults DNS to canonicalize the
2013 name. The variable 'system-name' is now obsolete.
2016 ** Function 'write-region' no longer outputs "Wrote FILE" in batch mode.
2019 ** If 'pwd' is called with a prefix argument, insert the current default
2023 ** New functions return extended information about fonts and faces.
2026 *** The function 'font-info' now returns more details about a font.
2027 In particular, it now returns the average width of the font's
2028 characters, which can be used for geometry-related calculations.
2031 *** A new function 'default-font-width' returns the average width of a
2032 character in the current buffer's default font. If the default face
2033 is remapped (see 'face-remapping-alist'), the value for the remapped
2034 face is returned. This function complements the existing function
2035 'default-font-height'.
2038 *** New functions 'window-font-height' and 'window-font-width' return
2039 the height and average width of characters in a specified face and
2040 window. If FACE is remapped (see 'face-remapping-alist'), the
2041 function returns the information for the remapped face.
2044 *** A new function 'window-max-chars-per-line' returns the maximal
2045 number of characters that can be displayed on one line. If a face
2046 and/or window are provided, these values are used for the
2047 calculation. This function is different from 'window-body-width' in
2048 that it accounts for (i) continuation glyphs, (ii) the size of the
2049 font, and (iii) the specified window.
2052 ** New utilities in subr-x.el:
2053 *** New macros 'if-let' and 'when-let' allow defining bindings and to
2054 execute code depending whether all values are true.
2055 *** New macros 'thread-first' and 'thread-last' allow threading a form
2056 as the first or last argument of subsequent forms.
2059 ** Documentation strings now support quoting with curved single quotes
2060 in addition to the old style with grave accent and apostrophe. The
2061 new style looks better on today's displays. In the new Electric Quote
2062 mode, you can enter curved single quotes into documentation by typing
2063 grave accent and apostrophe. Outside Electric Quote mode, you can
2064 enter them by typing 'C-x 8 [' and 'C-x 8 ]', or (if your Alt key
2065 works) by typing 'A-[' and 'A-]'. As described above under
2066 'text-quoting-style', the user can specify how to display doc string
2070 ** New function 'format-message' is like 'format' and also converts
2071 curved single quotes, grave accents and apostrophes as per
2072 'text-quoting-style'.
2075 ** show-help-function's arg is converted via substitute-command-keys
2076 before being passed to the function. Help strings, help-echo
2077 properties, etc. can therefore contain command key escapes and
2081 ** Time-related changes:
2083 *** Time conversion functions now accept an optional ZONE argument
2084 that specifies the time zone rules for conversion. ZONE is omitted or
2085 nil for Emacs local time, t for Universal Time, 'wall' for system wall
2086 clock time, or a string as in 'set-time-zone-rule' for a time zone
2087 rule. The affected functions are 'current-time-string',
2088 'current-time-zone', 'decode-time', and 'format-time-string'. The
2089 function 'encode-time', which already accepted a simple time zone rule
2090 argument, has been extended to accept all the new forms.
2092 *** Time-related functions now consistently accept numbers
2093 (representing seconds since the epoch) and nil (representing the
2094 current time) as well as the usual list-of-integer representation.
2095 Affected functions include 'current-time-string', 'current-time-zone',
2096 'decode-time', 'float-time', 'format-time-string', 'seconds-to-time',
2097 'time-add', 'time-less-p', 'time-subtract', 'time-to-day-in-year',
2098 'time-to-days', and 'time-to-seconds'.
2100 *** The 'encode-time-value' and 'with-decoded-time-value' macros have
2103 *** 'calendar-next-time-zone-transition', 'time-add', and
2104 'time-subtract' no longer return time values in the obsolete and
2105 undocumented integer-pair format. Instead, they return a list of two
2109 ** New function 'set-binary-mode' allows switching a standard stream
2110 of the Emacs process to binary I/O mode.
2113 ** The new function 'directory-name-p' can be used to check whether a file
2114 name (as returned from, for instance, 'file-name-all-completions') is
2115 a directory file name. It returns non-nil if the last character in
2116 the name is a directory separator character (forward slash on GNU and
2117 Unix systems, forward- or backslash on MS-Windows and MS-DOS).
2120 ** ASCII approximations to curved quotes are put in standard-display-table
2121 if the terminal cannot display curved quotes.
2124 ** Standard output and error streams now transliterate characters via
2125 standard-display-table, and encode output using locale-coding-system.
2126 To force a specific encoding, bind 'coding-system-for-write' to the
2127 coding-system of your choice when invoking functions like 'prin1' and
2131 ** New var 'truncate-string-ellipsis' to choose how to indicate truncation.
2134 ** New possible value for 'system-type': 'nacl'.
2135 This is used by Google's Native Client (NaCl).
2138 ** 'read-color' will now display the color names using the color itself
2139 as the background color.
2142 ** There is now a new variable 'flyspell-sort-corrections-function'
2143 that allows changing the way corrections are sorted.
2145 ** Miscellaneous name change
2148 For consistency with the usual Emacs spelling, the Lisp variable
2149 'hfy-optimisations' has been renamed to 'hfy-optimizations'.
2150 The old name should still work, as an obsolescent alias.
2152 ** Changes in Frame- and Window- Handling
2155 *** Emacs can now draw horizontal scroll bars on some platforms that
2156 provide toolkit scroll bars, namely Gtk+, Lucid, Motif and Windows.
2157 Horizontal scroll bars are turned off by default.
2159 **** New function 'horizontal-scroll-bars-available-p' telling whether
2160 horizontal scroll bars are available on the underlying system.
2162 **** New mode 'horizontal-scroll-bar-mode' to toggle horizontal scroll
2163 bars on all existing and future frames.
2165 **** New function 'toggle-horizontal-scroll-bar' to toggle horizontal
2166 scroll bars on the selected frame.
2168 **** New frame parameters 'horizontal-scroll-bars' and
2169 'scroll-bar-height' to set horizontal scroll bars and their height
2170 for individual frames and in 'default-frame-alist'.
2172 **** New functions 'frame-scroll-bar-height' and
2173 'window-scroll-bar-height' return the height of horizontal scroll
2174 bars on a specific frame or window.
2176 **** 'set-window-scroll-bars' now accepts five parameters where the last
2177 two specify height and type of the window's horizontal scroll bar.
2179 **** 'window-scroll-bars' now returns type and sizes of horizontal scroll
2182 **** New buffer-local variables 'horizontal-scroll-bar' and
2183 'scroll-bar-height'.
2186 *** New functions 'frame-geometry' and 'frame-edges' give access to a
2190 *** New functions 'mouse-absolute-pixel-position' and
2191 'set-mouse-absolute-pixel-position' get/set screen coordinates of the
2195 *** The function 'window-edges' now accepts three additional arguments to
2196 retrieve body, absolute and pixel edges of the window.
2199 *** The functions 'window-inside-edges', 'window-inside-pixel-edges' and
2200 'window-inside-absolute-pixel-edges' have been renamed to respectively
2201 'window-body-edges', 'window-body-pixel-edges' and
2202 'window-absolute-body-pixel-edges'. The old names are kept as aliases.
2205 *** New function 'window-absolute-pixel-position' to get the screen
2206 coordinates of a visible buffer position.
2209 *** The height of a frame's menu and tool bar are no longer counted in the
2210 frame's text height. This means that the text height stands only for
2211 the height of the frame's root window plus that of the echo area (if
2212 present). This was already the behavior for frames with external tool
2213 and menu bars (like in the Gtk builds) but has now been extended to all
2217 *** Frames now do not necessarily preserve the number of columns or lines
2218 they display when setting default font, menu bar, fringe width, or
2219 scroll bars. In particular, maximized and fullscreen frames are
2220 conceptually never resized if such settings change. For fullheight and
2221 fullwidth frames, the behavior may depend on the toolkit used.
2222 **** New option 'frame-inhibit-implied-resize' if non-nil, means that
2223 setting default font, menu bar, fringe width, or scroll bars of a
2224 specific frame does not resize that frame in order to preserve the
2225 number of columns or lines it displays.
2228 *** New function 'window-preserve-size' allows you to preserve the size of
2229 a window without "fixing" it. It's supported by 'fit-window-to-buffer',
2230 'temp-buffer-resize-mode' and 'display-buffer'.
2233 *** New 'display-buffer' action function 'display-buffer-use-some-frame'.
2234 This displays the buffer in an existing frame other than the current
2235 frame, and allows the caller to specify a frame predicate to exclude
2239 *** New minor mode 'window-divider-mode' and options
2240 'window-divider-default-places', 'window-divider-default-bottom-width'
2241 and 'window-divider-default-right-width'.
2244 ** Tearoff menus and detachable toolbars for Gtk+ have been removed.
2245 Those features have been deprecated in Gtk+ for a long time.
2250 *** etags no longer qualifies class members by default.
2252 By default, 'etags' will not qualify class members for Perl and C-like
2253 object-oriented languages with their class names and namespaces, and
2254 will remove qualifications used explicitly in the code from the tag
2255 names it puts in TAGS files. This is so the etags.el back-end for
2256 'xref-find-definitions' is more accurate and produces less false
2259 Use --class-qualify (-Q) if you want the old default behavior of
2260 qualifying class members in C++, Java, Objective C, and Perl. Note
2261 that using -Q might make some class members become "unknown" to 'M-.'
2262 ('xref-find-definitions'); if so, you can use 'C-u M-.' to specify the
2263 qualified names by hand.
2266 *** New language Ruby
2268 Names of modules, classes, methods, functions, and constants are
2269 tagged. Overloaded operators are also tagged.
2273 Names of packages, functions, and types are tagged.
2276 *** Improved support for Lua
2278 Etags now tags functions even if the "function" keyword follows some
2279 whitespace at line beginning.
2282 * Changes in Emacs 25.1 on Non-Free Operating Systems
2285 ** MS-Windows specific Emacs build scripts are no longer in the distribution
2286 This includes the makefile.w32-in files in various subdirectories, and
2287 the support files. The file nt/configure.bat now just tells the user
2288 to use the procedure described in nt/INSTALL, by running the Posix
2289 'configure' script in the top-level directory.
2292 ** Building Emacs for MS-Windows requires at least Windows XP
2293 or Windows Server 2003. The built binaries still run on all versions
2294 of Windows starting with Windows 9X.
2297 ** Emacs running on MS-Windows now supports the daemon mode.
2300 ** The byte counts in etags-generated TAGS files are now the same on
2301 MS-Windows as they are on other platforms.
2304 ** On OS X, configure creates a Cocoa ("Nextstep") build by default.
2305 Pass '--without-ns' to configure to create an X11 build, the old default.
2308 ** OS X 10.5 or older is no longer supported.
2311 ** OS X on PowerPC is no longer supported.
2314 ** New variable 'ns-use-fullscreen-animation' controls animation for
2315 non-native NS fullscreen. The default is nil. Set to t to enable
2316 animation when entering and leaving fullscreen. For native OSX fullscreen
2320 ** The new function 'w32-application-type' returns the type of an
2321 MS-Windows application given the name of its executable program file.
2323 ** New variable 'w32-pipe-buffer-size'.
2324 It can be used to tune the size of the buffer of pipes created for
2325 communicating with subprocesses, when the program run by a subprocess
2326 exhibits unusual buffering behavior. Default is zero, which lets the
2327 OS use its default size.
2330 ----------------------------------------------------------------------
2331 This file is part of GNU Emacs.
2333 GNU Emacs is free software: you can redistribute it and/or modify
2334 it under the terms of the GNU General Public License as published by
2335 the Free Software Foundation, either version 3 of the License, or
2336 (at your option) any later version.
2338 GNU Emacs is distributed in the hope that it will be useful,
2339 but WITHOUT ANY WARRANTY; without even the implied warranty of
2340 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2341 GNU General Public License for more details.
2343 You should have received a copy of the GNU General Public License
2344 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2350 paragraph-separate: "[
\f]*$"