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
28 ** The new option 'configure --enable-gcc-warnings=warn-only' causes
29 GCC to issue warnings without stopping the build. This behavior is
30 now the default in developer builds. As before, use
31 '--disable-gcc-warnings' to suppress GCC's warnings, and
32 '--enable-gcc-warnings' to stop the build if GCC issues warnings.
35 ** The Emacs server now has socket-launching support. This allows
36 socket based activation, where an external process like systemd can
37 invoke the Emacs server process upon a socket connection event and
38 hand the socket over to Emacs. Emacs uses this socket to service
39 emacsclient commands. This new functionality can be disabled with the
40 configure option '--disable-libsystemd'.
42 ** New configure option '--disable-build-details' attempts to build an
43 Emacs that is more likely to be reproducible; that is, if you build
44 and install Emacs twice, the second Emacs is a copy of the first.
45 Deterministic builds omit the build date from the output of the
46 emacs-version and erc-cmd-SV functions, and the leave the following
47 variables nil: emacs-build-system, emacs-build-time,
50 ** Emacs no longer works on IRIX. We expect that Emacs users are not
51 affected by this, as SGI stopped supporting IRIX in December 2013.
54 * Startup Changes in Emacs 25.2
57 * Changes in Emacs 25.2
60 ** A number of accessors for the value returned by 'file-attributes'
61 has been added. They are: 'file-attribute-type',
62 'file-attribute-link-number', 'file-attribute-user-id',
63 'file-attribute-group-id', 'file-attribute-access-time',
64 'file-attribute-modification-time',
65 'file-attribute-status-change-time', 'file-attribute-size',
66 'file-attribute-modes', 'file-attribute-inode-number', and
67 'file-attribute-device-number'
70 ** The new function 'buffer-hash' has been added, and can be used to
71 compute a fash, non-consing hash of the contents of a buffer.
74 ** 'fill-paragraph' no longer marks the buffer as changed unless it
75 actually changed something.
78 ** The locale language name 'ca' is now mapped to the language
79 environment 'Catalan', which has been added.
82 ** 'align-regexp' has a separate history for its interactive argument
83 'align-regexp' no longer shares its history with all other
84 history-less functions that use 'read-string'
87 ** The networking code has been reworked so that it's more
88 asynchronous than it was (when specifying :nowait t in
89 'make-network-process'). How asynchronous it is varies based on the
90 capabilities of the system, but on a typical GNU/Linux system the DNS
91 resolution, the connection, and (for TLS streams) the TLS negotiation
92 are all done without blocking the main Emacs thread. To get
93 asynchronous TLS, the TLS boot parameters have to be passed in (see
94 the manual for details).
96 Certain process oriented functions (like 'process-datagram-address')
97 will block until socket setup has been performed. The recommended way
98 to deal with asynchronous sockets is to avoid interacting with them
99 until they have changed status to "run". This is most easily done
100 from a process sentinel.
102 ** 'make-network-process' and 'open-network-stream' sometimes allowed
103 :service to be an integer string (e.g., :service "993") and sometimes
104 required an integer (e.g., :service 993). This difference has been
105 eliminated, and integer strings work everywhere.
107 ** It is possible to disable attempted recovery on fatal signals
109 Two new variables allow to disable attempts to recover from stack
110 overflow and to avoid automatic auto-save when Emacs is delivered a
111 fatal signal. 'attempt-stack-overflow-recovery', if set to 'nil',
112 will disable attempts to recover from C stack overflows; Emacs will
113 then crash as with any other fatal signal.
114 'attempt-orderly-shutdown-on-fatal-signal', if set to 'nil', will
115 disable attempts to auto-save the session and shut down in an orderly
116 fashion when Emacs receives a fatal signal; instead, Emacs will
117 terminate immediately. Both variables are non-'nil' by default.
118 These variables are for users who would like to avoid the small
119 probability of data corruption due to techniques Emacs uses to recover
123 * Editing Changes in Emacs 25.2
126 * Changes in Specialized Modes and Packages in Emacs 25.2
131 *** A new 's' command for switching to another eww buffer via the minibuffer.
134 *** The 'o' command ('shr-save-contents') has moved to 'O' to avoid collision
135 with the 'o' command from 'image-map'.
138 ** The commands that add ChangeLog entries now prefer a VCS root directory
139 for the ChangeLog file, if none already exists. Customize
140 'change-log-directory-files' to nil for the old behavior.
143 ** Support for non-string values of 'time-stamp-format' has been removed.
150 *** `message-use-idna' now defaults to t (because Emacs comes with
151 built-in IDNA support now).
154 *** New connection method "sg", which allows to edit files under
158 *** New connection method "doas" for OpenBSD hosts.
161 ** 'auto-revert-use-notify' is set back to t in 'global-auto-revert-mode'.
166 *** Support for completing attribute values and bang-rules using the
167 'completion-at-point' command.
170 ** Emacs now supports character name escape sequences in character and
171 string literals. The syntax variants \N{character name} and
172 \N{U+code} are supported.
175 * New Modes and Packages in Emacs 25.2
178 * Incompatible Lisp Changes in Emacs 25.2
181 ** Resizing a frame no longer runs 'window-configuration-change-hook'.
182 Put your function on 'window-size-change-functions' instead.
185 * Lisp Changes in Emacs 25.2
187 ** New var syntax-ppss-table to control the syntax-table used in syntax-ppss
189 ** Autoload files can be generated without timestamps,
190 by setting 'autoload-timestamps' to nil.
191 FIXME As an experiment, nil is the current default.
192 If no insurmountable problems before next release, it can stay that way.
194 ** 'ert-with-function-mocked' of 'ert-x package allows mocking of functions
198 ** 'gnutls-boot' now takes a parameter :complete-negotiation that says
199 that negotiation should complete even on non-blocking sockets.
202 ** New functions 'window-pixel-width-before-size-change' and
203 'window-pixel-height-before-size-change' allow to detect which window
204 changed size when 'window-size-change-functions' are run.
207 ** New function 'display-buffer-reuse-mode-window' is an action function
208 suitable for use in 'display-buffer-alist'. For example, to avoid creating
209 a new window when opening man pages when there's already one, use
210 (add-to-list 'display-buffer-alist
211 '("\\`\\*Man .*\\*\\'" .
212 (display-buffer-reuse-mode-window
213 (inhibit-same-window . nil)
217 ** New function 'func-arity' returns information about the argument list
218 of an arbitrary function.
219 This is a generalization of 'subr-arity' for functions that are not
220 built-in primitives. We recommend using this new function instead of
224 ** 'parse-partial-sexp' state has a new element. Element 10 is
225 non-nil when the last character scanned might be the first character
226 of a two character construct, i.e. a comment delimiter or escaped
227 character. Its value is the syntax of that last character.
230 ** 'parse-partial-sexp''s state, element 9, has now been confirmed as
231 permanent and documented, and may be used by Lisp programs. Its value
232 is a list of currently open parenthesis positions, starting with the
233 outermost parenthesis.
235 ** The function 'redirect-debugging-output' now works on platforms
236 other than GNU/Linux.
239 ** New functions 'sxhash-eq' and 'sxhash-eql' return hash codes of a
240 Lisp object suitable for use with 'eq' and 'eql' correspondingly. If
241 two objects are 'eq' ('eql'), then the result of 'sxhash-eq'
242 ('sxhash-eql') on them will be the same.
245 ** Function 'sxhash' has been renamed to 'sxhash-equal' for
246 consistency with the new functions. For compatibility, 'sxhash'
247 remains as an alias to 'sxhash-equal'.
250 ** Time conversion functions that accept a time zone rule argument now
251 allow it to be OFFSET or a list (OFFSET ABBR), where the integer
252 OFFSET is a count of seconds east of Universal Time, and the string
253 ABBR is a time zone abbreviation. The affected functions are
254 'current-time-string', 'current-time-zone', 'decode-time',
255 'format-time-string', and 'set-time-zone-rule'.
258 * Changes in Emacs 25.2 on Non-Free Operating Systems
260 ** Intercepting hotkeys on Windows 7 and later now works better.
261 The new keyboard hooking code properly grabs system hotkeys such as
262 Win-* and Alt-TAB, in a way that Emacs can get at them before the
263 system. This makes the 'w32-register-hot-key' functionality work
264 again on all versions of MS-Windows starting with Windows 7. On
265 Windows NT and later you can now register any hotkey combination. (On
266 Windows 9X, the previous limitations, spelled out in the Emacs manual,
270 * Installation Changes in Emacs 25.1
273 ** Building Emacs now requires C99 or later.
276 ** Building Emacs now requires GNU make, version 3.81 or later.
279 ** New configure option --with-cairo.
280 This builds Emacs with Cairo drawing. As a side effect, it provides
281 support for built-in printing, when Emacs was built with GTK+.
282 Cairo drawing is an experimental feature in Emacs, and subject to
283 change in future releases.
286 ** New configure option --with-modules.
287 This enables support for loading dynamic modules; see below.
290 ** By default, Emacs no longer works on IRIX. We expect that Emacs
291 users are not affected by this, as SGI stopped supporting IRIX in
292 December 2013. If you are affected, please send a bug report. You
293 should be able to work around the problem either by porting the Emacs
294 undumping code to GCC under IRIX, or by configuring --with-wide-int,
295 or by sticking with Emacs 24.4.
298 ** The Emacs garbage collector assumes GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS.
299 The GC_MAKE_GCPROS_NOOPS stack-marking variant has been the default
300 since Emacs 24.4, and the other variants were undocumented and were
301 obstacles to maintenance and development. GC_MARK_STACK and its
302 related symbols have been removed from the C internals.
305 ** 'configure' now prefers gnustep-config when configuring GNUstep.
306 If gnustep-config is not available, the old heuristics are used.
309 ** 'configure' now prefers inotify to gfile for file notification,
310 unless gfile is explicitly requested via --with-file-notification='gfile'.
313 ** 'configure' detects the kqueue file notification library on *BSD
314 and Mac OS X machines.
317 ** The configure option '--with-pkg-config-prog' has been removed.
318 Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to.
321 ** The configure option '--with-mmdf' has been removed.
322 It was no longer useful, as it relied on libraries that are no longer
323 supported, and its presence led to confusion during configuration.
324 This affects only the 'movemail' utility; Emacs itself can still
325 process MMDF-format files as before.
328 ** The configure option '--enable-silent-rules' is now the default,
329 and silent rules are now quieter. To get the old behavior where
330 'make' chatters a lot, configure with '--disable-silent-rules' or
331 build with 'make V=1'.
334 ** The configure option '--with-gameuser' now allows you to specify a
335 group instead of a user if its argument is prefixed by ':' (a colon).
336 This will cause the game score files in ${localstatedir}/games/emacs
337 to be owned by that group, and the helper program for updating them to
338 be installed setgid. The option now defaults to the 'games' group.
341 ** The 'grep-changelog' script (and its manual page) are no longer included.
342 It has no particular connection to Emacs and has not changed in years,
343 so if you want to use it, you can always take a copy from an older Emacs.
346 ** Emacs 25 comes with a new set of icons.
347 Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png.
348 The old Emacs logo icons are available as 'emacs23.png' in the same location.
351 ** New make target 'check-expensive' to run additional tests.
352 This includes all tests which run via "make check", plus additional
353 tests which take more time to perform.
356 * Startup Changes in Emacs 25.1
359 ** When Emacs is given a file as a command line argument and
360 'initial-buffer-choice' is non-nil, display both the file and
361 'initial-buffer-choice'. When Emacs is given more than one file and
362 'initial-buffer-choice' is non-nil, show 'initial-buffer-choice'
363 and *Buffer List*. This makes Emacs convenient to use from the
364 command line when 'initial-buffer-choice' is non-nil.
367 ** The value of 'initial-scratch-message' is now treated as a doc string
368 and can contain escape sequences for command keys, quotes, and the like.
371 ** The default height of GUI frames was enlarged.
372 This is so there's enough space in the initial window to display the
373 optional text about recovering crashes sessions, without losing the
374 splash image display.
377 * Changes in Emacs 25.1
380 ** Xwidgets: a new feature for embedding native widgets inside Emacs buffers.
381 If you have gtk3 and webkitgtk3 installed, and Emacs was built with
382 xwidget support, you can access the embedded webkit browser with 'M-x
383 xwidget-webkit-browse-url'. This opens a new buffer with the embedded
384 browser. The buffer will have a new mode, 'xwidget-webkit-mode'
385 (similar to 'image-mode'), which supports the webkit widget.
388 *** New functions for xwidget-webkit mode 'xwidget-webkit-insert-string',
389 'xwidget-webkit-adjust-size-dispatch', 'xwidget-webkit-back',
390 'xwidget-webkit-browse-url', 'xwidget-webkit-reload',
391 'xwidget-webkit-current-url', 'xwidget-webkit-scroll-backward',
392 'xwidget-webkit-scroll-forward', 'xwidget-webkit-scroll-down',
393 'xwidget-webkit-scroll-up'.
396 ** Emacs can now load shared/dynamic libraries (modules).
397 A dynamic Emacs module is a shared library that provides additional
398 functionality for use in Emacs Lisp programs, just like a package
399 written in Emacs Lisp would. The functions 'load', 'require',
400 'load-file', etc. were extended to load such modules, as they do with
401 Emacs Lisp packages. The new variable 'module-file-suffix' holds the
402 system-dependent value of the file-name extension ('.so' on Posix
403 hosts) of the module files.
405 A module should export a C-callable function named
406 'emacs_module_init', which Emacs will call as part of the call to
407 'load' or 'require' which loads the module. It should also export a
408 symbol named 'plugin_is_GPL_compatible' to indicate that its code is
409 released under the GPL or compatible license; Emacs will refuse to
410 load modules that don't export such a symbol.
412 If a module needs to call Emacs functions, it should do so through the
413 API defined and documented in the header file 'emacs-module.h'. Note
414 that any module that provides Lisp-callable functions will have to use
415 Emacs functions such as 'fset' and 'funcall', in order to register its
416 functions with the Emacs Lisp interpreter.
418 Modules can create 'user-ptr' Lisp objects that embed pointers to C
419 structs defined by the module. This is useful for keeping around
420 complex data structures created by a module, to be passed back to the
421 module's functions. User-ptr objects can also have associated
422 "finalizers" -- functions to be run when the object is GC'ed; this is
423 useful for freeing any resources allocated for the underlying data
424 structure, such as memory, open file descriptors, etc. A new
425 predicate 'user-ptrp' returns non-nil if its argument is a 'user-ptr'
428 Loadable modules in Emacs are an experimental feature, and subject to
429 change in future releases. For that reason, their support is disabled
430 by default, and must be enabled by using the '--with-modules' option
434 ** A second dir-local file (.dir-locals-2.el) is now accepted.
435 See the variable 'dir-locals-file-2' for more information.
438 ** Network security (TLS/SSL certificate validity and the like) is
439 added via the new Network Security Manager (NSM) and controlled via
440 the 'network-security-level' variable.
443 ** International domain names (IDNA) are now encoded via the new
444 puny.el library, so that one can visit web sites with non-ASCII URLs.
447 ** C-h l now also lists the commands that were run.
449 ** The new M-s M-w key binding uses eww to search the web for the
453 ** The new 'timer-list' command lists all active timers in a buffer
454 where you can cancel them with the 'c' command.
456 ** M-x suggests shorthands and ignores obsolete commands for completion.
457 ** x-select-enable-clipboard is renamed select-enable-clipboard.
458 x-select-enable-primary and renamed select-enable-primary.
459 Additionally they both now apply to all systems (OSX, GNUstep, Windows, you
460 name it), with the proviso that on some systems (e.g. Windows)
461 select-enable-primary is ineffective since the system doesn't
462 have the equivalent of a primary selection.
465 ** New option 'switch-to-buffer-in-dedicated-window' allows you to
466 customize how 'switch-to-buffer' proceeds interactively when the
467 selected window is strongly dedicated to its buffer.
470 ** The option 'even-window-heights' has been renamed to
471 'even-window-sizes' and now handles window widths as well.
474 ** New function 'read-multiple-choice' use to prompt for
475 multiple-choice questions, with a handy way to display help texts.
478 ** terpri gets an optional arg ENSURE to conditionally output a newline.
481 ** 'insert-register' now leaves point after the inserted text
482 when called interactively. A prefix argument toggles this behavior.
485 ** The new variable 'term-file-aliases' replaces some files from lisp/term.
486 The function 'tty-run-terminal-initialization' consults this variable
487 when deciding what terminal-specific initialization code to run.
490 ** New variable 'system-configuration-features', listing some of the
491 main features that Emacs was compiled with. This is mainly intended
492 for use in Emacs bug reports.
495 ** A password is now hidden also when typed in batch mode. Another
496 hiding character but the default '.' can be used by let-binding the
497 variable 'read-hide-char'.
500 ** The Emacs pseudo-random number generator can be securely seeded.
501 On system where Emacs can access the system entropy or some other
502 cryptographically secure random stream, it now uses that when 'random'
503 is called with its argument 't'. This allows cryptographically strong
504 random values; in particular, the Emacs server now uses this facility
505 to produce its authentication key.
508 ** New input methods: 'tamil-dvorak' and 'programmer-dvorak'.
511 * Editing Changes in Emacs 25.1
514 ** M-x suggests shorthands and ignores obsolete commands for completion.
519 *** Successive single-char deletions are collapsed in the undo-log just like
520 successive char insertions. Which commands invoke this behavior is
521 controlled by the new 'undo-auto-amalgamate' function. See the node
522 "Undo" in the ELisp manual for more details.
525 *** The heuristic used to insert 'undo-boundary' after each command
526 has changed, so that if a command causes changes in more than just the
527 current buffer, Emacs now calls 'undo-boundary' in every buffer
528 affected by the command.
531 ** New command 'comment-line' bound to 'C-x C-;'.
533 ** New and improved facilities for inserting Unicode characters
536 *** Unicode names entered via C-x 8 RET now use substring completion by default.
539 *** C-x 8 now has shorthands for several chars, such as U+2010
540 (HYPHEN), U+2011 (NON-BREAKING HYPHEN), and U+2012 (FIGURE DASH). As
541 before, you can type C-x 8 C-h to list shorthands.
544 *** New minor mode electric-quote-mode for using curved quotes as you
545 type. See also the new variable 'text-quoting-style'.
548 ** New minor mode global-eldoc-mode is enabled by default.
551 ** Emacs now uses "bracketed paste mode" on text terminals that support it.
552 Bracketed paste mode causes text terminals to wrap pasted text in special
553 escape sequences that allow Emacs to tell the difference between text
554 you type and text you paste from other applications. Emacs then
555 avoids interpreting each character in the pasted text as it does with
556 keyboard input, which results in a paste experience similar to that
557 under a window system, and significant performance improvements when
558 pasting large amounts of text.
560 Bracketed paste mode is disabled by default, so Emacs automatically
561 enables it at startup if the terminal supports it.
564 ** Emacs now supports the latest version of the UBA.
565 The Emacs implementation of the Unicode Bidirectional Algorithm (UBA)
566 was updated to support all the latest additions and changes introduced
567 in Unicode Standard versions 6.3, 7.0, and the latest Unicode 8.0.
568 This includes full support for directional isolates and the
569 Bidirectional Parentheses Algorithm (BPA) specified by these Unicode
573 ** You can access 'mouse-buffer-menu' (C-down-mouse-1) using C-f10.
576 ** New buffer-local 'electric-pair-local-mode'.
579 ** New variable 'fast-but-imprecise-scrolling' inhibits
580 fontification during full screen scrolling operations, giving less
581 hesitant operation during auto-repeat of C-v, M-v at the cost of
582 possible inaccuracies in the end position.
585 ** New documentation command 'describe-symbol'.
586 Works for functions, variables, faces, etc. It is bound to 'C-h o' by
590 ** New function 'custom-prompt-customize-unsaved-options' checks for
591 unsaved customizations and prompts user to customize (if found). It
592 is intended for adding to 'kill-emacs-query-functions'.
595 ** The old 'C-x w' bindings in hi-lock-mode are officially deprecated
596 in favor of the global 'M-s h' bindings introduced in Emacs-23.1.
597 They'll disappear soon.
600 ** New bindings for 'query-replace-map'.
601 'undo', undo the last replacement; bound to 'u'.
602 'undo-all', undo all replacements; bound to 'U'.
605 * Changes in Specialized Modes and Packages in Emacs 25.1
610 *** New command 'checkdoc-package-keywords' checks if the
611 current package keywords are recognized. Set the new option
612 'checkdoc-package-keywords-flag' to non-nil to make
613 'checkdoc-current-buffer' call this function automatically.
616 *** New function 'checkdoc-file' checks for style errors.
617 It's meant for use together with 'compile':
618 emacs -batch --eval "(checkdoc-file \"subr.el\")"
623 *** The desktop format version has been upgraded from 206 to 208.
624 Although Emacs 25.1 can read a version 206 desktop, earlier Emacsen
625 cannot read a version 208 desktop. To upgrade your desktop file, you
626 must explicitly request the upgrade, by C-u M-x desktop-save. You are
627 recommended to do this as soon as you have firmly upgraded to Emacs
628 25.1 (or later). Should you ever need to downgrade your desktop file
629 to version 206, you can do this with C-u C-u M-x desktop-save.
632 ** New function 'bookmark-set-no-overwrite' bound to C-x r M.
633 It raises an error if a bookmark of that name already exists,
634 unlike 'bookmark-set' which silently updates an existing bookmark.
639 *** New user options 'mm-html-inhibit-images' and 'mm-html-blocked-images'
640 now control how mm-* functions fetch and display images in an HTML
641 message. Gnus still uses 'gnus-inhibit-images' and 'gnus-blocked-images'
642 for that purpose, i.e., binds mm-html- variables with those gnus-
643 variables, but other packages do not have to bind gnus- variables now.
646 *** 'mm-inline-text-html-with-images' has been removed.
647 Use 'mm-html-inhibit-images' instead. Note that the value is opposite
653 *** 'imap-ssl-program' has been removed, and imap.el uses the internal
654 GnuTLS encryption functions if possible.
659 *** 'json-pretty-print' and 'json-pretty-print-buffer' now maintain
660 the ordering of object keys by default.
663 *** New commands 'json-pretty-print-ordered' and
664 'json-pretty-print-buffer-ordered' pretty prints JSON objects with
665 object keys sorted alphabetically.
668 ** Prog mode has some support for multi-mode indentation.
669 This allows better indentation support in modes that support multiple
670 programming languages in the same buffer, like literate programming
671 environments or ANTLR programs with embedded Python code.
673 A major mode can provide indentation context for a sub-mode through
674 the 'prog-indentation-context' variable. To support this, modes that
675 provide indentation should use 'prog-widen' instead of 'widen' and
676 'prog-first-column' instead of a literal zero. See the node
677 "Mode-Specific Indent" in the ELisp manual for more details.
679 ** Prettify Symbols mode
682 *** Prettify Symbols mode supports custom composition predicates. By
683 overriding the default 'prettify-symbols-compose-predicate', modes can
684 specify in which contexts a symbol may be displayed as some Unicode
685 character. 'prettify-symbols-default-compose-p' is the default which
686 is suitable for most programming languages such as C or Lisp (but not
690 *** Symbols can be unprettified while point is inside them.
691 New variable 'prettify-symbols-unprettify-at-point' configures this.
693 ** Enhanced xterm support
696 *** The new variable 'xterm-screen-extra-capabilities' for configuring xterm.
697 This variable tells Emacs which advanced capabilities are available in
698 the xterm terminal emulator used to display Emacs text-mode frames.
699 The default is to check each capability, and use it if available.
700 (This variable was introduced in Emacs 24.1, but was not announced in
704 *** Killing text now also sets the CLIPBOARD/PRIMARY selection
705 in the surrounding GUI (using the OSC-52 escape sequence). This only works
706 if your xterm supports it and enables the 'allowWindowOps' options (disabled
707 by default at least in Debian, for security reasons).
709 Similarly, you can yank the CLIPBOARD/PRIMARY selection (using the OSC-52
710 escape sequence) if your xterm has the feature enabled but for that you
711 additionally need to add 'getSelection' to 'xterm-extra-capabilities'.
714 *** 'xterm-mouse-mode' now supports mouse-tracking (if your xterm supports it).
717 ** The way to turn on and off 'save-place' mode has changed.
718 It is no longer sufficient to load the saveplace library and set
719 'save-place' non-nil. Instead, use the two new minor modes:
720 'save-place-mode' turns on saving last place in every file, and
721 'save-place-local-mode' does that only for the file in whose buffer it
722 is invoked. The 'save-place' variable is now an obsolete alias for
723 'save-place-mode', which replaces it, and 'toggle-save-place' is an
724 obsolete alias for the new 'save-place-local-mode' command.
729 *** ERC can now hide message types by network or channel.
730 'erc-hide-list' will hide all messages of the specified type, while
731 'erc-network-hide-list' and 'erc-channel-hide-list' will only hide the
732 specified message types for the respective specified targets.
734 *** New variable 'erc-default-port-tls' used to connect to TLS IRC
738 *** Reconnection is now asynchronous.
741 *** Nick completion is now case-insensitive again after inadvertently
742 being made case-sensitive in Emacs 24.2.
747 *** New commands, key binds, and menu items.
749 **** '<' and '>' for navigating previous and next tracks in playlist
751 **** New play/pause command 'mpc-toggle-play' bound to 's'
753 **** 'g' bound to new command 'mpc-seek-current' will navigate current
756 **** New commands 'mpc-toggle-{consume,repeat,single,shuffle}' for
757 toggling playback modes.
760 *** Now supports connecting to a UNIX domain socket.
763 *** Looks at more image file names to use as album art.
764 Case-insensitively tries for .folder.png (freedesktop) and folder.jpg
765 (XP) in addition to cover.jpg.
768 *** Searches in more locations for MPD configuration files.
769 MPD supports the XDG base directory specification since version 0.17.6.
774 *** 'midnight-mode' is now a proper minor mode.
777 *** clean-buffer-*-regexps can now specify buffers via predicate functions.
782 *** New "external" package status.
783 An external package is any installed package that's not built-in and
784 not from 'package-user-dir', which usually means it's from an entry in
785 'package-directory-list'. They are treated much like built-in
786 packages, in that they cannot be deleted through the package menu and
787 are not considered for upgrades.
789 The effect is that a user can manually place a specific version of a
790 package inside 'package-directory-list' and the package menu will
794 *** If a package is available on multiple archives and one has higher
795 priority (as per 'package-archive-priorities') only that one is
796 listed. This can be configured with 'package-menu-hide-low-priority'.
799 *** 'package-menu-toggle-hiding' now toggles the hiding of packages.
800 This includes the above-mentioned low-priority packages, as well as
801 available packages whose version is lower than the currently installed
802 version (which were previously impossible to display).
803 This allows users to downgrade a package if a lower version is
807 *** When filtering the package menu, keywords starting with "arc:" or
808 "status:" represent package archive or status, respectively, instead
812 *** Most functions which involve downloading information now take an
813 ASYNC argument. If it is non-nil, package.el performs the download(s)
817 *** New variable 'package-menu-async' controls whether the
818 package-menu uses asynchronous downloads.
821 *** 'package-install-from-buffer' and 'package-install-file' work on directories.
822 This follows the same rules as installing from a .tar file, except the
823 -pkg file is optional.
826 *** Packages which are dependencies of other packages cannot be deleted.
827 The FORCE argument to 'package-delete' overrides this.
830 *** New custom variable 'package-selected-packages' tracks packages
831 which were installed by the user (as opposed to installed as
832 dependencies). This variable can also be manually customized.
835 *** New command 'package-install-selected-packages' installs all
836 packages from 'package-selected-packages' which are currently missing.
839 *** 'package-install' function now takes a DONT-SELECT argument. If
840 this function is called interactively or if DONT-SELECT is nil, add the
841 package being installed to 'package-selected-packages'.
844 *** New command 'package-autoremove' removes all packages which were
845 installed strictly as dependencies but are no longer needed.
850 When you invoke 'shell' interactively, the *shell* buffer will now
851 display in a new window. However, you can customize this behavior via
852 the 'display-buffer-alist' variable. For example, to get
853 the old behavior -- *shell* buffer displays in current window -- use
854 (add-to-list 'display-buffer-alist
855 '("^\\*shell\\*$" . (display-buffer-same-window))).
859 *** The ':protection' slot option is not obeyed any more.
861 *** The 'newname' argument to constructors is optional&deprecated.
862 If you need your objects to be named, do it by inheriting from 'eieio-named'.
864 *** The <class>-list-p and <class>-child-p functions are declared obsolete.
866 *** The <class> variables are declared obsolete.
868 *** The <initarg> variables are declared obsolete.
870 *** defgeneric and defmethod are declared obsolete.
871 Use the equivalent facilities from cl-generic.el instead.
873 *** 'constructor' is now an obsolete alias for 'make-instance'.
874 --- 'pcase' accepts a new UPattern 'eieio'.
879 *** New command 'ido-bury-buffer-at-head' bound to C-S-b
880 Bury the buffer at the head of 'ido-matches', analogous to how C-k
881 kills the buffer at head.
884 *** A prefix argument to 'ido-restrict-to-matches' will reverse its
885 meaning, and the list is restricted to those elements that do not
886 match the current input.
891 *** You can use <UP> and <DOWN> arrow keys to move through history by lines.
892 The new commands 'next-line-or-history-element' and
893 'previous-line-or-history-element', bound to <UP> and <DOWN> in the
894 minibuffer, allow by-line movement through minibuffer history,
895 similarly to an ordinary buffer. Only when point moves over
896 the bottom/top of the minibuffer it goes to the next/previous history
897 element. 'M-p' and 'M-n' still move directly to previous/next history
900 ** Search and Replace
903 *** 'isearch' and 'query-replace' can now perform character folding in matches.
904 This is analogous to case folding, but instead of disregarding case
905 variants, it disregards wider classes of distinctions between similar
906 characters. (Case folding is a special case of character folding.)
907 This means many characters in the search string will match entire
908 groups of characters instead of just themselves.
910 For instance, the ASCII double quote character " will match all
911 variants of double quotes, and the letter 'a' will match all of its
912 accented cousins, even those composed of multiple characters, as well
913 as many other symbols like U+249C (PARENTHESIZED LATIN SMALL LETTER
916 Character folding is enabled by customizing 'search-default-mode' to
917 the value 'character-fold-to-regexp'. You can also toggle character
918 folding in the middle of a search by typing 'M-s ''.
920 'query-replace' honors character folding if the new variable
921 'replace-character-fold' is customized to a non-nil value.
924 *** New user option 'search-default-mode'.
925 This option specifies the default mode for Isearch. The default
926 value, nil specifies that Isearch does literal searches (however,
927 'case-fold-search' and 'isearch-lax-whitespace' may still be applied,
928 as in previous Emacs versions).
931 *** New function 'character-fold-to-regexp' can be used
932 by searching commands to produce a regexp matching anything that
933 character-folds into STRING.
936 *** The new M-s M-w key binding uses eww to search the web for the
937 text in the region. The search engine to use for this is specified by
938 the customizable variable 'eww-search-prefix'.
941 *** Query-replace history is enhanced.
942 When query-replace reads the FROM string from the minibuffer, typing
943 'M-p' will now show previous replacements as "FROM SEP TO", where FROM
944 and TO are the original text and its replacement, and SEP is an arrow
945 string defined by the new variable 'query-replace-from-to-separator'.
946 To select a prior replacement, type 'M-p' until the desired
947 replacement appears in the minibuffer, and then exit the minibuffer by
952 *** If 'quick-calc' is called with a prefix argument, insert the
953 result of the calculation into the current buffer.
956 ** In Edebug, you can now set the initial mode with C-x C-a C-m. With
957 this you can tell Edebug not to stop at the start of the first
958 instrumented function.
963 *** New minor mode 'global-eldoc-mode'
964 It is turned on by default, and affects '*scratch*' and other buffers
965 whose major mode supports Emacs Lisp.
968 *** 'eldoc-documentation-function' now defaults to 'ignore'
971 *** 'describe-char-eldoc' displays information about character at point,
972 and can be used as a default value of 'eldoc-documentation-function'. It is
973 useful when, for example, one needs to distinguish various spaces - e.g.,
974 U+00A0 (NO-BREAK SPACE), U+2002 (EN SPACE), and U+2009 (THIN SPACE) - while
975 using mono-spaced font.
980 *** HTML can now be rendered using variable-width fonts.
983 *** A new command 'F' ('eww-toggle-fonts') can be used to toggle
984 whether to use variable-pitch fonts or not. The user can also
985 customize the 'shr-use-fonts' variable.
988 *** A new command 'C' ('eww-toggle-colors') can be used to toggle
989 whether to use the HTML-specified colors or not. The user can also
990 customize the 'shr-use-colors' variable.
993 *** A new command 'R' ('eww-readable') will try do identify the main
994 textual parts of a web page and display only that, leaving menus and
995 the like off the page.
998 *** A new command 'D' ('eww-toggle-paragraph-direction') allows you to
999 toggle the paragraph direction between left-to-right and right-to-left.
1002 *** Images that are being loaded are now marked with grey
1003 "placeholder" images of the size specified by the HTML. They are then
1004 replaced by the real images asynchronously, which will also now
1005 respect width/height HTML specs (unless they specify widths/heights
1006 bigger than the current window).
1009 *** You can now use several eww buffers in parallel by renaming eww
1010 buffers you want to keep separate.
1013 *** Partial state of the eww buffers (the URIs and the titles of the
1014 pages visited) is now preserved in the desktop file.
1017 *** 'eww-after-render-hook' is now called after eww has rendered
1018 the data in the buffer.
1021 *** The 'eww-reload' command now takes a prefix to not reload via
1022 the net, but just use the local copy of the HTML.
1025 *** The DOM shr and eww uses has been changed to the general Emacs
1026 xml.el/libxml2 DOM, and a new package dom.el has been added to
1027 interact with this DOM. See the Emacs Lisp manual for interface
1031 *** 'mailcap-mime-data' is now consulted when displaying PDF files.
1034 *** The new 'S' command will list all eww buffers, and allow managing
1038 *** https pages with valid certificates have headers marked in green, while
1039 invalid certificates are marked in red.
1044 *** text/html messages that contain inline image parts will be
1045 transformed into multipart/related messages before sending.
1048 *** The 'message-valid-fqdn-regexp' variable has been removed, since
1049 there are now top-level domains added all the time. Message will no
1050 longer warn about sending emails to top-level domains it hasn't heard
1053 *** 'message-beginning-of-line' (bound to C-a) understands folded headers.
1054 In 'visual-line-mode' it will look for the true beginning of a header
1055 while in non-'visual-line-mode' it will move the point to the indented
1059 ** In Show Paren Mode, a parenthesis can be highlighted when point
1060 stands inside it, and certain parens can be highlighted when point is
1061 at BOL or EOL, or in whitespace there. To enable these, customize,
1062 respectively, 'show-paren-when-point-inside-paren' or
1063 'show-paren-when-point-in-periphery'.
1066 ** If gpg2 exists on the system, it is now used as the default value
1067 of 'epg-gpg-program' (instead of gpg).
1072 *** Images are automatically scaled before displaying based on the
1073 'image-scaling-factor' variable (if Emacs supports scaling the images
1077 *** Images inserted with 'insert-image' and related functions get a
1078 keymap put into the text properties (or overlays) that span the
1079 image. This keymap binds keystrokes for manipulating size and
1080 rotation, as well as saving the image to a file. These commands are
1081 also available in 'image-mode'.
1084 *** A new library for creating and manipulating SVG images has been
1085 added. See the "SVG Images" section in the lispref manual for
1089 *** New setf-able function to access and set image parameters is
1090 provided: 'image-property'.
1096 *** Strings after ':documentation' are highlighted as docstrings.
1097 This enhances Lisp mode fontification to handle documentation of the
1098 form '(:documentation "the doc string")' used in Common Lisp code for
1099 CLOS class and slot documentation.
1101 ** Rectangle editing
1104 *** Rectangle Mark mode can have corners past EOL or in the middle of a TAB.
1107 *** C-x C-x in rectangle-mark-mode now cycles through the four corners.
1108 *** 'string-rectangle' provides on-the-fly preview of the result.
1111 ** New font-lock functions 'font-lock-ensure' and 'font-lock-flush'.
1112 These should be used in preference to 'font-lock-fontify-buffer' when
1116 ** Macro 'minibuffer-with-setup-hook' can optionally append a function
1117 to 'minibuffer-setup-hook'.
1119 If the first argument of the macro is of the form '(:append FUN)',
1120 then FUN will be appended to 'minibuffer-setup-hook', instead of
1125 *** New functions 'cl-fresh-line', 'cl-digit-char-p', and 'cl-parse-integer'.
1128 *** 'pcase' accepts the new UPattern 'cl-struct'.
1130 ** Calendar and diary
1133 *** The default 'diary-file' is now located in .emacs.d.
1136 *** New commands to insert diary entries with Chinese dates:
1137 'diary-chinese-insert-anniversary-entry' 'diary-chinese-insert-entry'
1138 'diary-chinese-insert-monthly-entry', 'diary-chinese-insert-yearly-entry'.
1141 *** The calendar can now list and mark diary entries with Chinese dates.
1142 See 'diary-chinese-list-entries' and 'diary-chinese-mark-entries'.
1145 *** The option 'calendar-mode-line-format' can now be nil,
1146 which means to do nothing special with the mode line in calendars.
1149 *** New option 'calendar-weekend-days'.
1150 The option customizes which day headers receive the
1151 'calendar-weekend-header' face.
1154 *** New optional args N and STRING for 'holiday-greek-orthodox-easter'.
1157 *** Many items obsolete since at least version 23.1 have been removed.
1158 The majority were function/variable/face aliases, too numerous to list here.
1161 **** Functions 'calendar-one-frame-setup', 'calendar-only-one-frame-setup',
1162 'calendar-two-frame-setup', 'european-calendar', 'american-calendar'.
1164 **** Hooks 'cal-menu-load-hook', 'cal-x-load-hook'.
1166 **** Macro 'calendar-for-loop'.
1168 **** Variables 'european-calendar-style', 'diary-face', 'hebrew-holidays-{1,4}'.
1170 **** The nil and list forms of 'diary-display-function'.
1173 ** New ERT function 'ert-summarize-tests-batch-and-exit'.
1174 If the output of ERT tests in batch mode execution can be saved to a
1175 log file, then it can be passed as an argument to the above function
1176 to produce a neat summary.
1179 ** New js.el option 'js-indent-first-init'.
1184 ** Info mode now displays symbol names in fixed-pitch font.
1185 If you want to get the old behavior back, customize the 'Info-quoted'
1186 face to use the same definitions as the default face.
1189 *** 'Info-fontify-maximum-menu-size' can be t for no limit.
1192 *** 'info-display-manual' can now be given a prefix argument which (any
1193 non-nil value) directs the command to limit the completion
1194 alternatives to currently visited manuals.
1197 ** ntlm.el has support for NTLM2.
1202 *** The Rmail commands 'd', 'C-d' and 'u' take optional repeat counts
1203 to delete or undelete multiple messages.
1206 *** Rmail can now render HTML mail messages if your Emacs was built with
1207 libxml2 or if you have the Lynx browser installed. By default, Rmail
1208 will display the HTML version of a mail message that has both HTML and
1209 plain text parts, if display of HTML email is possible; customize the
1210 'rmail-mime-prefer-html' option to 'nil' if you don't want that.
1213 *** In the commands that make summaries by subject, recipients, or senders,
1214 you can no longer use commas to separate regular expressions.
1217 ** SES now supports local printer functions; see 'ses-define-local-printer'.
1219 ** Shell-script Mode
1221 *** In sh-mode you can now use 'sh-shell' as a file-local variable to
1222 specify the type of shell in use (bash, csh, etc).
1225 *** New value 'always' for 'sh-indent-after-continuation'.
1226 This provides old-style ("dumb") indentation of continued lines.
1227 See the doc string of 'sh-indent-after-continuation' for details.
1231 *** Fatal TLS errors are now silent by default.
1234 *** If Emacs isn't built with TLS support, an external TLS-capable
1235 program is used instead. This program used to be run in --insecure
1236 mode by default, but has now changed to be secure instead, and will
1237 fail if you try to connect to non-verifiable hosts. This is
1238 controlled by the 'tls-program' variable.
1243 *** The URL package accepts now the protocols "ssh", "scp" and "rsync".
1244 When 'url-handler-mode' is enabled, file operations for these
1245 protocols as well as for "telnet" and "ftp" are passed to Tramp.
1248 *** The URL package allows customizing the 'url-user-agent' string.
1249 The new 'url-user-agent' variable can be customized to be a string or
1253 *** The new interface variable 'url-request-noninteractive' can be used
1254 to specify that we're running in a noninteractive context, and that
1255 we should not be queried about things like TLS certificate validity.
1258 *** 'url-mime-accept-string' can now be used as in "interface"
1259 variable, meaning you can bind it around an 'url-retrieve' call.
1262 *** If URL is used with a https connection, the first callback argument
1263 plist will contain a :peer element that has the output of
1264 'gnutls-peer-status' (if Emacs is built with GnuTLS support).
1267 *** The new function 'url-cookie-delete-cookie' can be used to
1268 programmatically delete all cookies, or cookies from a specific
1271 *** The URL package now support https over proxies supporting CONNECT.
1276 *** New connection method "afp", which allows you to access Mac OS X
1277 volumes via the Apple Filing Protocol.
1280 *** New connection method "nc", which allows you to access dumb
1284 *** Method-specific parameters can be overwritten now with variable
1285 'tramp-connection-properties'.
1288 *** Handler for 'file-notify-valid-p' for remote machines that support
1289 filesystem notifications.
1294 *** New user variable 'sql-default-directory' enables remote
1295 connections using Tramp.
1298 *** New command 'sql-send-line-and-next'.
1299 This command, bound to 'C-c C-n' by default, sends the current line to
1300 the SQL process and advances to the next line, skipping whitespace and
1304 *** Added support for Vertica SQL.
1306 ** VC and related modes
1309 *** Basic push support, via 'vc-push', bound to 'C-x v P'.
1310 Implemented for Bzr, Git, Hg. As part of this change, the pre-existing
1311 (undocumented) command vc-hg-push now behaves slightly differently.
1314 *** The new command vc-region-history shows the log+diff of the active region.
1317 *** You can refresh the VC state of a file buffer with 'M-x vc-refresh-state'.
1318 This command is useful when you perform version control commands
1319 outside Emacs (e.g., from the shell prompt), or if you switch the VC
1320 back-end for the buffer's file, or remove it from version control.
1323 *** The VC state indicator in the mode line now defaults to more
1324 colorful faces to make it more obvious to the user what the state is.
1325 See the 'vc-faces' customization group.
1328 *** New option 'vc-annotate-background-mode' controls whether
1329 the color range from 'vc-annotate-color-map' is applied to the
1330 background or to the foreground.
1333 *** New options for customizing encoding of Git commit log messages.
1334 The new options `vc-git-commits-coding-system' and
1335 `vc-git-log-output-coding-system' allow to customize the encoding of
1336 the log messages sent to Git when committing, and the decoding of the
1337 log messages read from Git history commands. Both default to UTF-8;
1338 if you customize them, make sure they are consistent with the Git
1339 config variables i18n.commitEncoding and i18n.logOutputEncoding.
1340 (`vc-git-commits-coding-system' existed previously, but was a
1341 variable, not a user option.)
1344 *** 'compare-windows' now compares text with the most recently selected window
1345 instead of the next window. If you want the previous behavior of
1346 comparing with the next window, customize the new option
1347 'compare-windows-get-window-function' to the value
1348 'compare-windows-get-next-window'.
1351 *** Two new faces 'compare-windows-removed' and 'compare-windows-added'
1352 replace the face 'compare-windows', which is now an obsolete alias for
1353 'compare-windows-added'.
1356 *** The VC state indicator in the mode line now has different faces
1357 corresponding to each of the possible states. See the 'vc-faces'
1358 customization group.
1361 *** 'log-edit-insert-changelog' converts "(tiny change)" to
1362 "Copyright-paperwork-exempt: yes". Set 'log-edit-rewrite-tiny-change'
1363 nil to disable this.
1366 ** VHDL mode now supports VHDL'08.
1371 *** Decimal display mode uses "," groups, so it's more
1372 fitting for use in money calculations
1375 *** Factorial works with non-integer inputs.
1380 *** Hide-IfDef mode now support full C/C++ expressions in macros,
1381 macro argument expansion, interactive macro evaluation and automatic
1382 scanning of #define'd symbols.
1385 *** New command 'hif-evaluate-macro', bound to 'C-c @ e', displays the
1386 result of evaluating a macro.
1389 *** New command 'hif-clear-all-ifdef-define', bound to 'C-c @ C', clears
1390 all defined symbols in 'hide-ifdef-env'.
1393 *** New custom variable 'hide-ifdef-header-regexp' to define C/C++ header
1394 file name patterns. Defaults to files whose extension is one of '.h',
1395 '.hh', '.hpp', '.hxx', or '.h++', matched case-insensitively.
1398 *** New custom variable 'hide-ifdef-expand-reinclusion-protection' to prevent
1399 reinclusion protected (a.k.a. "idempotent") header files from being hidden.
1400 (This could happen when an idempotent header file is visited again,
1401 when its guard symbol is already defined.) Defaults to 't'.
1404 *** New custom variable 'hide-ifdef-exclude-define-regexp' to define symbol
1405 name patterns (e.g. all "FOR_DOXYGEN_ONLY_*") to be ignored when
1406 looking for macro definitions. By default, no symbols are ignored.
1411 *** New custom variable 'tex-print-file-extension' to help users who
1412 use PDF instead of DVI.
1415 *** TeX mode now supports Prettify Symbols mode. When enabling
1416 'prettify-symbols-mode' in a tex-mode buffer, \alpha ... \omega, and
1417 many other math macros are displayed using unicode characters.
1420 ** New 'big-indent' style in 'whitespace-mode' highlights deep indentation.
1421 By default, 32 consecutive spaces or four consecutive TABs are
1422 considered to be too deep, but the new variable
1423 'whitespace-big-indent-regexp' can be customized to change that.
1426 ** New options in 'tildify-mode'.
1427 New options 'tildify-space-string', 'tildify-pattern', and
1428 'tildify-foreach-region-function' variables make
1429 'tildify-string-alist', 'tildify-pattern-alist', and
1430 'tildify-ignored-environments-alist' variables (as well as a few
1431 helper functions) obsolete.
1434 ** New package Xref replaces Etags's front-end and UI
1436 The new package Xref provides a generic framework and new commands to
1437 find and move to definitions of functions, macros, data structures
1438 etc., as well as go back to the location where you were before moving
1439 to a definition. It supersedes and obsoletes many Etags commands,
1440 while still using the etags.el code that reads the TAGS tables as one
1443 The command 'xref-find-definitions' replaces 'find-tag' and provides
1444 an interface to pick one definition among several.
1445 'tags-loop-continue' is now unbound. 'xref-pop-marker-stack' replaces
1446 'pop-tag-mark', but has a keybinding ('M-,') different from the one
1447 'pop-tag-mark' used.
1449 'xref-find-definitions-other-window' replaces 'find-tag-other-window'.
1450 'xref-find-definitions-other-frame' replaces 'find-tag-other-frame'.
1451 'xref-find-apropos' replaces 'find-tag-regexp'.
1453 As a result of this, the following commands are now obsolete:
1454 'find-tag-other-window', 'find-tag-other-frame', 'find-tag-regexp',
1457 'tags-loop-continue' is not obsolete because it's still useful in
1458 'tags-search' and 'tags-query-replace', for which there are no direct
1462 *** Variants of 'tags-search' and 'tags-query-replace' in Dired were also
1463 replaced by xref-style commands, see the "Dired" section below.
1468 'find-tag-marker-ring-length' is now an obsolete alias for
1469 'xref-marker-ring-length'. 'find-tag-marker-ring' is now an obsolete
1470 alias for a private variable. 'xref-push-marker-stack' and
1471 'xref-pop-marker-stack' should be used instead to manipulate the stack
1472 of searches for definitions.
1475 *** 'xref-find-definitions' and 'describe-function' now display
1476 information about mode local overrides (defined by cedet/mode-local.el
1477 'define-overloadable-function' 'define-mode-local-overrides').
1479 The framework's Lisp API is still experimental and can change in major,
1480 backward-incompatible ways.
1483 ** New package Project
1485 The new package Project provides generic infrastructure for dealing
1486 with projects. The main commands included in it are
1487 'project-find-file' and 'project-find-regexp'.
1489 The Lisp API of this package is still experimental.
1492 EUDC's LDAP backend has been improved.
1495 *** EUDC supports LDAP-over-SSL URLs (ldaps://).
1498 *** EUDC passes LDAP passwords through a pipe to the ldapsearch
1499 subprocess instead of on the command line.
1502 *** EUDC handles LDAP wildcards automatically so the user shouldn't
1503 need to configure this manually anymore.
1506 *** The LDAP configuration section of EUDC's manual has been
1509 There have also been customization changes.
1512 *** New custom variable 'eudc-server-hotlist' to allow specifying
1513 multiple EUDC servers in init file.
1516 *** Custom variable 'eudc-inline-query-format' defaults to completing
1517 on email and firstname instead of surname.
1520 *** Custom variable 'eudc-expansion-overwrites-query' defaults to nil
1521 to avoid interfering with the kill ring.
1524 *** Custom variable 'eudc-inline-expansion-format' defaults to
1525 "Firstname Surname <mail-address>".
1528 *** Custom variable 'eudc-options-file' defaults to
1529 "~/.emacs.d/eudc-options".
1532 *** New custom variable 'ldap-ldapsearch-password-prompt-regexp' to
1533 allow overriding the regular expression that recognizes the ldapsearch
1534 command line's password prompt.
1537 EUDC's BBDB backend now supports BBDB 3.
1540 EUDC's PH backend (eudcb-ph.el) is obsolete.
1545 *** The new built-in command 'clear' can scroll window contents out of sight.
1546 If provided with an optional non-nil argument, the scrollback contents will be cleared.
1549 *** New buffer syntax '#<buffer-name>', which is equivalent to
1550 '#<buffer buffer-name>'. This shorthand makes interacting with
1551 buffers from eshell more convenient. Custom variable
1552 'eshell-buffer-shorthand', which has been broken for a while, has been
1556 *** By default, eshell "visual" program buffers (created by
1557 'eshell-visual-commands' and similar custom vars) are no longer killed
1558 when their processes die. This fixes issues with short-lived commands
1559 and makes visual programs more useful in general. For example, if
1560 "git log" is a visual command, it will always show the visual command
1561 buffer, even if the "git log" process dies. For the old behavior,
1562 make the new option 'eshell-destroy-buffer-when-process-dies' non-nil.
1567 *** Support for the Google Chrome web browser.
1570 *** Support for the Conkeror web browser.
1573 *** Support for several ancient browsers is now officially obsolete.
1576 ** tar-mode: new 'tar-new-entry' command, allowing for new members to
1577 be added to the archive.
1582 *** Dired buffers are also auto-reverted via file notifications, if
1583 Emacs is compiled with file notification support.
1586 *** 'auto-revert-use-notify' is set to nil in 'global-auto-revert-mode'.
1587 See <http://debbugs.gnu.org/22814>.
1589 ** File Notifications
1592 *** The kqueue library is integrated for *BSD and Mac OS X machines.
1595 *** The new event 'stopped' signals, that a file notification watch is
1596 not active any longer.
1599 *** The new function 'file-notify-valid-p' checks, whether a file
1600 notification descriptor still corresponds to an activate watch.
1605 *** The command 'dired-do-compress' bound to 'Z' now can compress
1606 directories and decompress zip files.
1609 *** New command 'dired-do-compress-to' bound to 'c' can be used to
1610 compress many marked files into a single named archive. The
1611 compression command is determined from the new
1612 'dired-compress-files-alist' variable.
1615 *** In wdired, when editing files to contain slash characters,
1616 the resulting directories are automatically created. Whether
1617 to do this or not is controlled by the
1618 'wdired-create-parent-directories' variable.
1621 *** 'W' is now bound to 'browse-url-of-dired-file', and is useful for
1622 viewing HTML files and the like.
1624 *** New user interface for the 'A' and 'Q' commands.
1625 These keys, now bound to 'dired-do-find-regexp' and
1626 'dired-do-find-regexp-and-replace', work similarly to 'xref-find-apropos'
1627 and 'xref-query-replace-in-results': they present the matches
1628 in the '*xref*' buffer and let you move through the matches. No need
1629 to use 'tags-loop-continue' to resume the search or replace loop. The
1630 previous commands, 'dired-do-search' and
1631 'dired-do-query-replace-regexp', are still available, but not bound to
1632 keys; rebind 'A' and 'Q' to invoke them if you want the old behavior
1633 back. We intend to obsolete the old commands in a future release.
1635 ** Tabulated List Mode
1638 *** It is now safe for a mode that derives 'tabulated-list-mode' to not
1639 call 'tabulated-list-init-header', in which case it will have no
1643 *** 'tabulated-list-print' takes a second optional argument, update,
1644 which specifies an alternative printing method which is faster when
1645 few or no entries have changed.
1647 ** Obsolete packages
1653 *** landmark.el (moved to elpa.gnu.org)
1656 * New Modes and Packages in Emacs 25.1
1659 ** pinentry.el allows GnuPG passphrase to be prompted through the
1660 minibuffer instead of a graphical dialog, depending on whether the gpg
1661 command is called from Emacs (i.e., INSIDE_EMACS environment variable
1662 is set). This feature requires newer versions of GnuPG (2.1.5 or
1663 later) and Pinentry (0.9.5 or later). To use this feature, add
1664 "allow-emacs-pinentry" to "~/.gnupg/gpg-agent.conf" and reload the
1665 configuration with "gpgconf --reload gpg-agent".
1668 ** cl-generic.el provides CLOS-style multiple-dispatch generic functions.
1669 The main entry points are 'cl-defgeneric' and 'cl-defmethod'. See the
1670 node "Generic Functions" in the Emacs Lisp manual for more details.
1673 ** scss-mode (a minor variant of css-mode) is a major mode for editing
1674 SCSS (Sassy CSS) files.
1677 ** let-alist is a new macro (and a package) that allows one to easily
1678 let-bind the values stored in an alist.
1681 ** 'tildify-mode' allows automatic insertion of hard spaces as one
1682 types the text. Breaking line after a single-character words is
1683 forbidden by Czech and Polish typography (and may be discouraged in
1684 other languages), so 'auto-tildify-mode' makes it easier to create
1685 a typographically-correct documents.
1688 ** The 'seq' library adds sequence manipulation functions and macros
1689 that complement basic functions provided by subr.el. All functions
1690 are prefixed with 'seq-' and work on lists, strings and vectors.
1691 'pcase' accepts a new Upattern 'seq'.
1694 ** The 'map' library provides map-manipulation functions that work on
1695 alists, hash-table and arrays. All functions are prefixed with
1696 'map-'. 'pcase' accepts a new UPattern 'map'.
1699 ** The 'thunk' library provides functions and macros to control the
1700 evaluation of forms.
1703 ** js-jsx-mode (a minor variant of js-mode) provides indentation
1704 support for JSX, an XML-like syntax extension to ECMAScript.
1707 * Incompatible Lisp Changes in Emacs 25.1
1710 ** 'setq' and 'setf' must now be called with an even number of
1711 arguments. The earlier behavior of silently supplying a nil to the
1712 last variable when there was an odd number of arguments has been
1716 ** 'syntax-begin-function' is declared obsolete.
1717 Removed font-lock-beginning-of-syntax-function and the SYNTAX-BEGIN
1718 slot in font-lock-defaults.
1721 ** The new implementation of Subword mode affects word movement everywhere.
1722 When Subword mode is turned on, 'forward-word', 'backward-word', and
1723 everything that uses them will move by sub-words, effectively
1724 overriding the buffer's syntax table. Lisp programs that shouldn't be
1725 affected by Subword mode should call the new functions
1726 'forward-word-strictly' and 'backward-word-strictly' instead.
1729 ** 'package-initialize' now sets 'package-enable-at-startup' to nil if
1730 called during startup. Users who call this function in their init
1731 file and still expect it to be run after startup should set
1732 'package-enable-at-startup' to t after the call to
1733 'package-initialize'.
1736 ** ':global' minor mode use 'setq-default' rather than 'setq'.
1737 This means that you can't use 'make-local-variable' and expect them to
1738 "magically" become buffer-local.
1741 ** 'track-mouse' no longer freezes the shape of the mouse pointer.
1742 The 'track-mouse' form no longer refrains from changing the shape of
1743 the mouse pointer for the entire time the body of that form is
1744 executed. Lisp programs that use 'track-mouse' for dragging across
1745 large portions of the Emacs display, and want to avoid changes in the
1746 pointer shape during dragging, should bind the variable 'track-mouse'
1747 to the special value 'dragging' in the body of the form.
1750 ** The optional 'predicate' argument of 'lisp-complete-symbol' no longer
1751 has any effect. (This change was made in Emacs 24.4 but was not
1752 advertised at the time.)
1755 ** 'indirect-function' does not signal 'void-function' any more.
1756 This is mostly a bug-fix, since this change was missed back in 24.4 when
1757 symbol-function was changed not to signal 'void-function' any more.
1760 *** As a consequence, the second arg of 'indirect-function' is now obsolete.
1763 ** M-x shell and M-x compile no longer set the EMACS environment variable.
1764 This avoids clashing when other programs use the variable for other purposes.
1765 Although M-x term still sets EMACS for compatibility with Bash 4.3 and earlier,
1766 this is deprecated and will be phased out when Bash 4.4 or later takes over.
1767 Use the INSIDE_EMACS environment variable instead.
1769 ** 'C-up', 'C-down', 'C-left' and 'C-right' are now defined in term
1770 mode to send the same escape sequences that xterm does. This makes
1771 things like forward-word in readline work.
1774 ** hideshow mode got four key bindings that are analogous to outline
1775 mode bindings: 'C-c @ C-a', 'C-c @ C-t', 'C-c @ C-d', and 'C-c @ C-e.'
1778 ** 'save-excursion' does not save&restore the mark any more.
1779 Use 'save-mark-and-excursion' if you want the old behavior.
1782 ** 'read-buffer' and 'read-buffer-function' can now be called with a 4th
1783 argument ('predicate').
1786 ** 'completion-table-dynamic' by default stays in the minibuffer.
1787 The minibuffer will be the current buffer when the function is called.
1788 If you want the old behavior of calling the function in the buffer
1789 from which the minibuffer was entered, use the new argument
1790 'switch-buffer' to 'completion-table-dynamic'.
1793 ** window-configurations no longer record the buffers' marks.
1796 ** inhibit-modification-hooks now also inhibits lock-file checks, as well as
1797 active region handling.
1800 ** deactivate-mark is now buffer-local.
1803 ** 'cl-the' now asserts that its argument is of the given type.
1806 ** 'process-running-child-p' may now return a numeric process
1807 group ID instead of 't'.
1810 ** Mouse click events on mode line or header line no longer include
1811 any reference to a buffer position. The 6th member of the mouse
1812 position list returned for such events is now nil.
1815 ** Menu items in keymaps do not support the "key shortcut cache" any more.
1816 These slots used to hold key-shortcut data, but have been obsolete since
1820 ** Emacs no longer downcases the first letter of a system diagnostic
1821 when signaling a file error. For example, it now reports "Permission
1822 denied" instead of "permission denied". The old behavior was problematic
1823 in languages like German where downcasing rules depend on grammar.
1826 ** New variable 'text-quoting-style' to control how Emacs translates quotes.
1827 Set it to 'curve' for curved single quotes, to 'straight' for straight
1828 apostrophes, and to 'grave' for grave accent and apostrophe. The
1829 default value nil acts like 'curve' if curved single quotes are
1830 displayable, and like 'grave' otherwise. The new variable affects
1831 display of diagnostics and help, but not of info.
1834 ** substitute-command-keys now replaces quotes.
1835 That is, it converts documentation strings' quoting style as per the
1836 value of 'text-quoting-style'. Doc strings in source code can use
1837 either curved single quotes or grave accents and apostrophes. As
1838 before, characters preceded by \= are output as-is.
1841 ** Message-issuing functions 'error', 'message', etc. now convert quotes.
1842 They use the new 'format-message' function instead of plain 'format',
1843 so that they now follow user preference as per 'text-quoting-style'
1844 when processing curved single quotes, grave accents, and apostrophes
1845 in their format argument.
1848 ** The character classes [:alpha:] and [:alnum:] in regular expressions
1849 now match multibyte characters using Unicode character properties.
1850 If you want the old behavior where they matched any character with
1851 word syntax, use '\sw' instead.
1854 ** The character classes [:graph:] and [:print:] in regular expressions
1855 no longer match every multibyte character. Instead, Emacs now
1856 consults the Unicode character properties to determine which
1857 characters are graphic or printable. In particular, surrogates and
1858 unassigned codepoints are now rejected. If you want the old behavior,
1859 use [:multibyte:] instead.
1862 ** The 'diff' command uses the unified format now. To restore the old
1863 behavior, set 'diff-switches' to '-c'.
1866 ** 'grep-template' and 'grep-find-template' values don't include the
1867 --color argument anymore. It's added at the <C> place holder position
1868 dynamically. Any third-party code that changes these templates should
1869 be updated accordingly.
1871 ** The grep/rgrep/lgrep functions will now ask about saving files
1872 before running. This is controlled by the 'grep-save-buffers'
1876 ** '(/ N)' is now equivalent to '(/ 1 N)' rather than to '(/ N 1)'.
1877 The new behavior is compatible with Common Lisp and with XEmacs.
1878 This change does not affect Lisp code intended to be portable to
1879 Emacs 24.2 and earlier, which did not support unary '/'.
1882 ** The 'default-directory' value doesn't have to end slash. To make
1883 that happen, 'unhandled-file-name-directory' now defaults to calling
1884 'file-name-as-directory'.
1887 * Lisp Changes in Emacs 25.1
1891 *** New UPatterns 'quote', 'app'.
1893 *** New UPatterns can be defined with 'pcase-defmacro'.
1895 *** New vector QPattern.
1898 ** syntax-propertize is now automatically called on-demand during forward
1899 parsing functions like 'forward-sexp'.
1902 ** New hooks 'prefix-command-echo-keystrokes-functions' and
1903 'prefix-command-preserve-state-hook' allow the definition of prefix
1904 commands other than the predefined 'C-u'.
1907 ** New functions 'filepos-to-bufferpos' and 'bufferpos-to-filepos'.
1908 These allow conversion between buffer positions and the corresponding
1909 file byte offsets, given the file's encoding.
1912 ** The default value of 'load-read-function' is now 'read'.
1913 Previously, the default value of 'nil' implied using 'read'.
1916 ** New hook 'pre-redisplay-functions'.
1917 It is a bit easier to use than 'pre-redisplay-function'.
1920 ** The second arg of 'looking-back' should always be provided explicitly.
1921 Previously, it was an optional argument, now it's mandatory.
1924 ** Text properties 'intangible', 'point-entered', and 'point-left' are obsolete.
1925 Replaced by properties 'cursor-intangible' and 'cursor-sensor-functions',
1926 implemented by the new 'cursor-intangible-mode' and
1927 'cursor-sensor-mode' minor modes.
1930 ** 'inhibit-point-motion-hooks' now defaults to 't' and is obsolete.
1931 Use the new minor modes 'cursor-intangible-mode' and
1932 'cursor-sensor-mode' instead.
1935 ** New process type 'pipe', which can be used in combination with the
1936 ':stderr' keyword of make-process to handle standard error output
1940 ** New function 'make-process' provides an alternative interface to
1941 'start-process'. It allows programs to set process parameters such as
1942 process filter, sentinel, etc., through keyword arguments (similar to
1943 'make-network-process').
1946 ** A new function 'directory-files-recursively' returns all matching
1947 files (recursively) under a directory.
1950 ** New variable 'inhibit-message', when bound to non-nil, inhibits
1951 'message' and related functions from displaying messages in the echo
1952 area. The output is still logged to the *Messages* buffer.
1955 ** A new text property 'inhibit-read-only' can be used in read-only
1956 buffers to allow certain parts of the text to be writable.
1959 ** A new variable 'comment-end-can-be-escaped' is useful in languages
1960 such as C and C++ where line comments with escaped newlines are
1961 continued to the next line.
1964 ** New macro 'define-advice'.
1967 ** Emacs Lisp now supports generators.
1968 See the "Generators" section of the ELisp manual for the details.
1971 ** New finalizer facility for running code when objects become unreachable.
1972 See the "Finalizer Type" subsection in the ELisp manual for the
1976 ** lexical closures can use (:documentation FORM) to build their docstring.
1977 It should be placed right where the docstring would be, and FORM is then
1978 evaluated (and should return a string) when the closure is built.
1981 ** The new command 'fortune-message' has been added, which displays
1982 fortunes in the echo area.
1985 ** define-inline provides a new way to define inlinable functions.
1988 ** New function 'macroexpand-1' to perform a single step of macro expansion.
1991 ** Some "x-*" functions were obsoleted and/or renamed:
1992 *** x-select-text is renamed gui-select-text.
1993 *** x-selection-value is renamed gui-selection-value.
1994 *** x-get-selection is renamed gui-get-selection.
1995 *** x-get-clipboard and x-clipboard-yank are marked obsolete.
1996 *** x-get-selection-value is renamed to gui-get-primary-selection.
1997 *** x-set-selection is renamed to gui-set-selection
2000 ** New function 'string-greaterp', which return the opposite result of
2004 ** The new functions 'string-collate-lessp' and 'string-collate-equalp'
2005 preserve the collation order as defined by the system's locale(1)
2006 environment. For the time being this is implemented for modern POSIX
2007 systems and for MS-Windows, for other systems they fall back to their
2008 counterparts 'string-lessp' and 'string-equal'.
2011 ** The new function 'string-version-lessp' compares strings by
2012 interpreting consecutive runs of numerical characters as numbers, and
2013 compares their numerical values. According to this predicate,
2014 "foo2.png" is smaller than "foo12.png".
2017 *** The ls-lisp package uses 'string-collate-lessp' to sort file names.
2018 The effect is that, on systems that use ls-lisp for Dired, the default
2019 sort order of the files in Dired is now different from what it was in
2020 previous versions of Emacs. In particular, the file names are sorted
2021 disregarding punctuation, accents, and diacritics, and letter case is
2022 ignored. For example, files whose name begin with a period will no
2023 longer appear near the beginning of the directory listing. If you
2024 want the old, locale-independent sorting, customize the new option
2025 'ls-lisp-use-string-collate' to the nil value.
2028 *** The MS-Windows specific variable 'w32-collate-ignore-punctuation',
2029 if set to a non-nil value, causes the above 2 functions to ignore
2030 symbol and punctuation characters when collating strings. This
2031 emulates the behavior of modern Posix platforms when the locale's
2032 codeset is "UTF-8" (as in "en_US.UTF-8"). This is needed because
2033 MS-Windows doesn't support UTF-8 as codeset in its locales.
2036 ** New function 'alist-get', which is also a valid place (aka lvalue).
2039 ** New function 'funcall-interactively', which works like 'funcall'
2040 but makes 'called-interactively-p' treat the function as (you guessed it)
2041 called interactively.
2044 ** New function 'function-put' to use instead of 'put' for function properties.
2047 ** The new function 'bidi-find-overridden-directionality' allows you to
2048 find characters whose directionality was, perhaps maliciously,
2049 overridden by directional override control characters. Lisp programs
2050 can use this to detect potential phishing of URLs and other links that
2051 exploits bidirectional display reordering.
2054 ** The new function 'buffer-substring-with-bidi-context' allows you to
2055 copy a portion of a buffer into a different location while preserving
2056 the visual appearance both of the copied text and the text at
2057 destination, even when the copied text includes mixed bidirectional
2058 text and directional control characters.
2061 ** New properties that can be specified with 'declare':
2062 *** (interactive-only INSTEAD), says to use INSTEAD for non-interactive use.
2063 *** (pure VAL), if VAL is non-nil, indicates the function is pure.
2064 *** (side-effect-free VAL), if VAL is non-nil, indicates the function does not
2068 ** New macro 'with-file-modes', for evaluating expressions with default file
2069 permissions set to temporary values (e.g., for creating private files).
2072 ** You can access the slots of structures using 'cl-struct-slot-value'.
2075 ** Function 'sort' can deal with vectors.
2078 ** Function 'system-name' now returns an updated value if the current
2079 system's name has changed or if the Emacs process has changed systems,
2080 and to avoid long waits it no longer consults DNS to canonicalize the
2081 name. The variable 'system-name' is now obsolete.
2084 ** Function 'write-region' no longer outputs "Wrote FILE" in batch mode.
2087 ** If 'pwd' is called with a prefix argument, insert the current default
2091 ** New functions return extended information about fonts and faces.
2094 *** The function 'font-info' now returns more details about a font.
2095 In particular, it now returns the average width of the font's
2096 characters, which can be used for geometry-related calculations.
2099 *** A new function 'default-font-width' returns the average width of a
2100 character in the current buffer's default font. If the default face
2101 is remapped (see 'face-remapping-alist'), the value for the remapped
2102 face is returned. This function complements the existing function
2103 'default-font-height'.
2106 *** New functions 'window-font-height' and 'window-font-width' return
2107 the height and average width of characters in a specified face and
2108 window. If FACE is remapped (see 'face-remapping-alist'), the
2109 function returns the information for the remapped face.
2112 *** A new function 'window-max-chars-per-line' returns the maximal
2113 number of characters that can be displayed on one line. If a face
2114 and/or window are provided, these values are used for the
2115 calculation. This function is different from 'window-body-width' in
2116 that it accounts for (i) continuation glyphs, (ii) the size of the
2117 font, and (iii) the specified window.
2120 ** New utilities in subr-x.el:
2121 *** New macros 'if-let' and 'when-let' allow defining bindings and to
2122 execute code depending whether all values are true.
2123 *** New macros 'thread-first' and 'thread-last' allow threading a form
2124 as the first or last argument of subsequent forms.
2127 ** Documentation strings now support quoting with curved single quotes
2128 in addition to the old style with grave accent and apostrophe. The
2129 new style looks better on today's displays. In the new Electric Quote
2130 mode, you can enter curved single quotes into documentation by typing
2131 grave accent and apostrophe. Outside Electric Quote mode, you can
2132 enter them by typing 'C-x 8 [' and 'C-x 8 ]', or (if your Alt key
2133 works) by typing 'A-[' and 'A-]'. As described above under
2134 'text-quoting-style', the user can specify how to display doc string
2138 ** New function 'format-message' is like 'format' and also converts
2139 curved single quotes, grave accents and apostrophes as per
2140 'text-quoting-style'.
2143 ** show-help-function's arg is converted via substitute-command-keys
2144 before being passed to the function. Help strings, help-echo
2145 properties, etc. can therefore contain command key escapes and
2149 ** Time-related changes:
2151 *** Time conversion functions now accept an optional ZONE argument
2152 that specifies the time zone rules for conversion. ZONE is omitted or
2153 nil for Emacs local time, t for Universal Time, 'wall' for system wall
2154 clock time, or a string as in the TZ environment variable. The
2155 affected functions are 'current-time-string', 'current-time-zone',
2156 'decode-time', and 'format-time-string'. The function 'encode-time',
2157 which already accepted a simple time zone rule argument, has been
2158 extended to accept all the new forms.
2160 *** Incompatible change in the third argument of 'format-time-string'.
2161 Previously, any non-nil argument was interpreted as specifying Universal Time.
2162 This is no longer true; packages that want Universal Time should pass t
2163 as the third argument.
2165 *** Time-related functions now consistently accept numbers
2166 (representing seconds since the epoch) and nil (representing the
2167 current time) as well as the usual list-of-integer representation.
2168 Affected functions include 'current-time-string', 'current-time-zone',
2169 'decode-time', 'float-time', 'format-time-string', 'seconds-to-time',
2170 'time-add', 'time-less-p', 'time-subtract', 'time-to-day-in-year',
2171 'time-to-days', and 'time-to-seconds'.
2173 *** The 'encode-time-value' and 'with-decoded-time-value' macros have
2176 *** 'calendar-next-time-zone-transition', 'time-add', and
2177 'time-subtract' no longer return time values in the obsolete and
2178 undocumented integer-pair format. Instead, they return a list of two
2182 ** New function 'set-binary-mode' allows switching a standard stream
2183 of the Emacs process to binary I/O mode.
2186 ** The new function 'directory-name-p' can be used to check whether a file
2187 name (as returned from, for instance, 'file-name-all-completions') is
2188 a directory file name. It returns non-nil if the last character in
2189 the name is a directory separator character (forward slash on GNU and
2190 Unix systems, forward- or backslash on MS-Windows and MS-DOS).
2193 ** ASCII approximations to curved quotes are put in standard-display-table
2194 if the terminal cannot display curved quotes.
2197 ** Standard output and error streams now transliterate characters via
2198 standard-display-table, and encode output using locale-coding-system.
2199 To force a specific encoding, bind 'coding-system-for-write' to the
2200 coding-system of your choice when invoking functions like 'prin1' and
2204 ** New var 'truncate-string-ellipsis' to choose how to indicate truncation.
2207 ** New possible value for 'system-type': 'nacl'.
2208 This is used by Google's Native Client (NaCl).
2211 ** 'read-color' will now display the color names using the color itself
2212 as the background color.
2215 ** There is now a new variable 'flyspell-sort-corrections-function'
2216 that allows changing the way corrections are sorted.
2218 ** Miscellaneous name change
2221 For consistency with the usual Emacs spelling, the Lisp variable
2222 'hfy-optimisations' has been renamed to 'hfy-optimizations'.
2223 The old name should still work, as an obsolescent alias.
2225 ** Changes in Frame- and Window- Handling
2228 *** Emacs can now draw horizontal scroll bars on some platforms that
2229 provide toolkit scroll bars, namely Gtk+, Lucid, Motif and Windows.
2230 Horizontal scroll bars are turned off by default.
2232 **** New function 'horizontal-scroll-bars-available-p' telling whether
2233 horizontal scroll bars are available on the underlying system.
2235 **** New mode 'horizontal-scroll-bar-mode' to toggle horizontal scroll
2236 bars on all existing and future frames.
2238 **** New function 'toggle-horizontal-scroll-bar' to toggle horizontal
2239 scroll bars on the selected frame.
2241 **** New frame parameters 'horizontal-scroll-bars' and
2242 'scroll-bar-height' to set horizontal scroll bars and their height
2243 for individual frames and in 'default-frame-alist'.
2245 **** New functions 'frame-scroll-bar-height' and
2246 'window-scroll-bar-height' return the height of horizontal scroll
2247 bars on a specific frame or window.
2249 **** 'set-window-scroll-bars' now accepts five parameters where the last
2250 two specify height and type of the window's horizontal scroll bar.
2252 **** 'window-scroll-bars' now returns type and sizes of horizontal scroll
2255 **** New buffer-local variables 'horizontal-scroll-bar' and
2256 'scroll-bar-height'.
2259 *** New functions 'frame-geometry' and 'frame-edges' give access to a
2263 *** New functions 'mouse-absolute-pixel-position' and
2264 'set-mouse-absolute-pixel-position' get/set screen coordinates of the
2268 *** The function 'window-edges' now accepts three additional arguments to
2269 retrieve body, absolute and pixel edges of the window.
2272 *** The functions 'window-inside-edges', 'window-inside-pixel-edges' and
2273 'window-inside-absolute-pixel-edges' have been renamed to respectively
2274 'window-body-edges', 'window-body-pixel-edges' and
2275 'window-absolute-body-pixel-edges'. The old names are kept as aliases.
2278 *** New function 'window-absolute-pixel-position' to get the screen
2279 coordinates of a visible buffer position.
2282 *** The height of a frame's menu and tool bar are no longer counted in the
2283 frame's text height. This means that the text height stands only for
2284 the height of the frame's root window plus that of the echo area (if
2285 present). This was already the behavior for frames with external tool
2286 and menu bars (like in the Gtk builds) but has now been extended to all
2290 *** Frames now do not necessarily preserve the number of columns or lines
2291 they display when setting default font, menu bar, fringe width, or
2292 scroll bars. In particular, maximized and fullscreen frames are
2293 conceptually never resized if such settings change. For fullheight and
2294 fullwidth frames, the behavior may depend on the toolkit used.
2295 **** New option 'frame-inhibit-implied-resize' if non-nil, means that
2296 setting default font, menu bar, fringe width, or scroll bars of a
2297 specific frame does not resize that frame in order to preserve the
2298 number of columns or lines it displays.
2301 *** New function 'window-preserve-size' allows you to preserve the size of
2302 a window without "fixing" it. It's supported by 'fit-window-to-buffer',
2303 'temp-buffer-resize-mode' and 'display-buffer'.
2306 *** New 'display-buffer' action function 'display-buffer-use-some-frame'.
2307 This displays the buffer in an existing frame other than the current
2308 frame, and allows the caller to specify a frame predicate to exclude
2312 *** New minor mode 'window-divider-mode' and options
2313 'window-divider-default-places', 'window-divider-default-bottom-width'
2314 and 'window-divider-default-right-width'.
2317 *** The window displaying the '*Completions*' buffer with minibuffer
2318 completion candidates is now shown at the bottom of the selected
2319 frame. The size of that window is always as large as required to
2320 display all the candidates, except when limited by the minimum size
2321 of the other windows on that frame; those other windows are resized
2322 to provide space for the '*Completions*' display. The Emacs manual
2323 describes how to customize 'display-buffer-alist' to get back the old
2324 behavior, see the node "Temporary Displays" there.
2327 ** Tearoff menus and detachable toolbars for Gtk+ have been removed.
2328 Those features have been deprecated in Gtk+ for a long time.
2333 *** etags no longer qualifies class members by default.
2335 By default, 'etags' will not qualify class members for Perl and C-like
2336 object-oriented languages with their class names and namespaces, and
2337 will remove qualifications used explicitly in the code from the tag
2338 names it puts in TAGS files. This is so the etags.el back-end for
2339 'xref-find-definitions' is more accurate and produces less false
2342 Use --class-qualify (-Q) if you want the old default behavior of
2343 qualifying class members in C++, Java, Objective C, and Perl. Note
2344 that using -Q might make some class members become "unknown" to 'M-.'
2345 ('xref-find-definitions'); if so, you can use 'C-u M-.' to specify the
2346 qualified names by hand.
2349 *** New language Ruby
2351 Names of modules, classes, methods, functions, and constants are
2352 tagged. Overloaded operators are also tagged.
2356 Names of packages, functions, and types are tagged.
2359 *** Improved support for Lua
2361 Etags now tags functions even if the "function" keyword follows some
2362 whitespace at line beginning.
2365 * Changes in Emacs 25.1 on Non-Free Operating Systems
2368 ** MS-Windows specific Emacs build scripts are no longer in the distribution
2369 This includes the makefile.w32-in files in various subdirectories, and
2370 the support files. The file nt/configure.bat now just tells the user
2371 to use the procedure described in nt/INSTALL, by running the Posix
2372 'configure' script in the top-level directory.
2375 ** Building Emacs for MS-Windows requires at least Windows XP
2376 or Windows Server 2003. The built binaries still run on all versions
2377 of Windows starting with Windows 9X.
2380 ** Emacs running on MS-Windows now supports the daemon mode.
2383 ** The byte counts in etags-generated TAGS files are now the same on
2384 MS-Windows as they are on other platforms.
2387 ** On OS X, configure creates a Cocoa ("Nextstep") build by default.
2388 Pass '--without-ns' to configure to create an X11 build, the old default.
2391 ** OS X 10.5 or older is no longer supported.
2394 ** OS X on PowerPC is no longer supported.
2397 ** New variable 'ns-use-fullscreen-animation' controls animation for
2398 non-native NS fullscreen. The default is nil. Set to t to enable
2399 animation when entering and leaving fullscreen. For native OSX fullscreen
2403 ** The new function 'w32-application-type' returns the type of an
2404 MS-Windows application given the name of its executable program file.
2406 ** New variable 'w32-pipe-buffer-size'.
2407 It can be used to tune the size of the buffer of pipes created for
2408 communicating with subprocesses, when the program run by a subprocess
2409 exhibits unusual buffering behavior. Default is zero, which lets the
2410 OS use its default size.
2413 ----------------------------------------------------------------------
2414 This file is part of GNU Emacs.
2416 GNU Emacs is free software: you can redistribute it and/or modify
2417 it under the terms of the GNU General Public License as published by
2418 the Free Software Foundation, either version 3 of the License, or
2419 (at your option) any later version.
2421 GNU Emacs is distributed in the hope that it will be useful,
2422 but WITHOUT ANY WARRANTY; without even the implied warranty of
2423 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2424 GNU General Public License for more details.
2426 You should have received a copy of the GNU General Public License
2427 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2433 paragraph-separate: "[
\f]*$"