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 bild. This behavior is now
30 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 ** Emacs server now has socket-launching support. This allows socket
36 based activation, where an external process can invoke the Emacs
37 server process upon a socket connection event and hand over the socket
38 to Emacs. Emacs will use this socket for servicing emacsclient
39 commands. systemd can make use of this new functionally but can be
40 disabled with the 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.
148 *** New connection method "sg", which allows to edit files under
152 *** New connection method "doas" for OpenBSD hosts.
155 ** 'auto-revert-use-notify' is set back to t in 'global-auto-revert-mode'.
160 *** Support for completing attribute values and bang-rules using the
161 'completion-at-point' command.
164 * New Modes and Packages in Emacs 25.2
167 * Incompatible Lisp Changes in Emacs 25.2
170 ** Resizing a frame no longer runs 'window-configuration-change-hook'.
171 Put your function on 'window-size-change-functions' instead.
174 * Lisp Changes in Emacs 25.2
176 ** New var syntax-ppss-table to control the syntax-table used in syntax-ppss
178 ** Autoload files can be generated without timestamps,
179 by setting 'autoload-timestamps' to nil.
180 FIXME As an experiment, nil is the current default.
181 If no insurmountable problems before next release, it can stay that way.
183 ** 'ert-with-function-mocked' of 'ert-x package allows mocking of functions
187 ** 'gnutls-boot' now takes a parameter :complete-negotiation that says
188 that negotiation should complete even on non-blocking sockets.
191 ** New functions 'window-pixel-width-before-size-change' and
192 'window-pixel-height-before-size-change' allow to detect which window
193 changed size when 'window-size-change-functions' are run.
196 ** New function 'display-buffer-reuse-mode-window' is an action function
197 suitable for use in 'display-buffer-alist'. For example, to avoid creating
198 a new window when opening man pages when there's already one, use
199 (add-to-list 'display-buffer-alist
200 '("\\`\\*Man .*\\*\\'" .
201 (display-buffer-reuse-mode-window
202 (inhibit-same-window . nil)
206 ** New function 'func-arity' returns information about the argument list
207 of an arbitrary function.
208 This is a generalization of 'subr-arity' for functions that are not
209 built-in primitives. We recommend using this new function instead of
213 ** 'parse-partial-sexp' state has a new element. Element 10 is
214 non-nil when the last character scanned might be the first character
215 of a two character construct, i.e. a comment delimiter or escaped
216 character. Its value is the syntax of that last character.
219 ** 'parse-partial-sexp''s state, element 9, has now been confirmed as
220 permanent and documented, and may be used by Lisp programs. Its value
221 is a list of currently open parenthesis positions, starting with the
222 outermost parenthesis.
224 ** The function 'redirect-debugging-output' now works on platforms
225 other than GNU/Linux.
228 ** New functions 'sxhash-eq' and 'sxhash-eql' return hash codes of a
229 Lisp object suitable for use with 'eq' and 'eql' correspondingly. If
230 two objects are 'eq' ('eql'), then the result of 'sxhash-eq'
231 ('sxhash-eql') on them will be the same.
234 ** Function 'sxhash' has been renamed to 'sxhash-equal' for
235 consistency with the new functions. For compatibility, 'sxhash'
236 remains as an alias to 'sxhash-equal'.
239 ** Time conversion functions that accept a time zone rule argument now
240 allow it to be OFFSET or a list (OFFSET ABBR), where the integer
241 OFFSET is a count of seconds east of Universal Time, and the string
242 ABBR is a time zone abbreviation. The affected functions are
243 'current-time-string', 'current-time-zone', 'decode-time',
244 'format-time-string', and 'set-time-zone-rule'.
247 * Changes in Emacs 25.2 on Non-Free Operating Systems
249 ** Intercepting hotkeys on Windows 7 and later now works better.
250 The new keyboard hooking code properly grabs system hotkeys such as
251 Win-* and Alt-TAB, in a way that Emacs can get at them before the
252 system. This makes the 'w32-register-hot-key' functionality work
253 again on all versions of MS-Windows starting with Windows 7. On
254 Windows NT and later you can now register any hotkey combination. (On
255 Windows 9X, the previous limitations, spelled out in the Emacs manual,
259 * Installation Changes in Emacs 25.1
262 ** Building Emacs now requires C99 or later.
265 ** Building Emacs now requires GNU make, version 3.81 or later.
268 ** New configure option --with-cairo.
269 This builds Emacs with Cairo drawing. As a side effect, it provides
270 support for built-in printing, when Emacs was built with GTK+.
271 Cairo drawing is an experimental feature in Emacs, and subject to
272 change in future releases.
275 ** New configure option --with-modules.
276 This enables support for loading dynamic modules; see below.
279 ** By default, Emacs no longer works on IRIX. We expect that Emacs
280 users are not affected by this, as SGI stopped supporting IRIX in
281 December 2013. If you are affected, please send a bug report. You
282 should be able to work around the problem either by porting the Emacs
283 undumping code to GCC under IRIX, or by configuring --with-wide-int,
284 or by sticking with Emacs 24.4.
287 ** The Emacs garbage collector assumes GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS.
288 The GC_MAKE_GCPROS_NOOPS stack-marking variant has been the default
289 since Emacs 24.4, and the other variants were undocumented and were
290 obstacles to maintenance and development. GC_MARK_STACK and its
291 related symbols have been removed from the C internals.
294 ** 'configure' now prefers gnustep-config when configuring GNUstep.
295 If gnustep-config is not available, the old heuristics are used.
298 ** 'configure' now prefers inotify to gfile for file notification,
299 unless gfile is explicitly requested via --with-file-notification='gfile'.
302 ** 'configure' detects the kqueue file notification library on *BSD
303 and Mac OS X machines.
306 ** The configure option '--with-pkg-config-prog' has been removed.
307 Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to.
310 ** The configure option '--with-mmdf' has been removed.
311 It was no longer useful, as it relied on libraries that are no longer
312 supported, and its presence led to confusion during configuration.
313 This affects only the 'movemail' utility; Emacs itself can still
314 process MMDF-format files as before.
317 ** The configure option '--enable-silent-rules' is now the default,
318 and silent rules are now quieter. To get the old behavior where
319 'make' chatters a lot, configure with '--disable-silent-rules' or
320 build with 'make V=1'.
323 ** The configure option '--with-gameuser' now allows you to specify a
324 group instead of a user if its argument is prefixed by ':' (a colon).
325 This will cause the game score files in ${localstatedir}/games/emacs
326 to be owned by that group, and the helper program for updating them to
327 be installed setgid. The option now defaults to the 'games' group.
330 ** The 'grep-changelog' script (and its manual page) are no longer included.
331 It has no particular connection to Emacs and has not changed in years,
332 so if you want to use it, you can always take a copy from an older Emacs.
335 ** Emacs 25 comes with a new set of icons.
336 Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png.
337 The old Emacs logo icons are available as 'emacs23.png' in the same location.
340 ** New make target 'check-expensive' to run additional tests.
341 This includes all tests which run via "make check", plus additional
342 tests which take more time to perform.
345 * Startup Changes in Emacs 25.1
348 ** When Emacs is given a file as a command line argument and
349 'initial-buffer-choice' is non-nil, display both the file and
350 'initial-buffer-choice'. When Emacs is given more than one file and
351 'initial-buffer-choice' is non-nil, show 'initial-buffer-choice'
352 and *Buffer List*. This makes Emacs convenient to use from the
353 command line when 'initial-buffer-choice' is non-nil.
356 ** The value of 'initial-scratch-message' is now treated as a doc string
357 and can contain escape sequences for command keys, quotes, and the like.
360 ** The default height of GUI frames was enlarged.
361 This is so there's enough space in the initial window to display the
362 optional text about recovering crashes sessions, without losing the
363 splash image display.
366 * Changes in Emacs 25.1
369 ** Xwidgets: a new feature for embedding native widgets inside Emacs buffers.
370 If you have gtk3 and webkitgtk3 installed, and Emacs was built with
371 xwidget support, you can access the embedded webkit browser with 'M-x
372 xwidget-webkit-browse-url'. This opens a new buffer with the embedded
373 browser. The buffer will have a new mode, 'xwidget-webkit-mode'
374 (similar to 'image-mode'), which supports the webkit widget.
377 *** New functions for xwidget-webkit mode 'xwidget-webkit-insert-string',
378 'xwidget-webkit-adjust-size-dispatch', 'xwidget-webkit-back',
379 'xwidget-webkit-browse-url', 'xwidget-webkit-reload',
380 'xwidget-webkit-current-url', 'xwidget-webkit-scroll-backward',
381 'xwidget-webkit-scroll-forward', 'xwidget-webkit-scroll-down',
382 'xwidget-webkit-scroll-up'.
385 ** Emacs can now load shared/dynamic libraries (modules).
386 A dynamic Emacs module is a shared library that provides additional
387 functionality for use in Emacs Lisp programs, just like a package
388 written in Emacs Lisp would. The functions 'load', 'require',
389 'load-file', etc. were extended to load such modules, as they do with
390 Emacs Lisp packages. The new variable 'module-file-suffix' holds the
391 system-dependent value of the file-name extension ('.so' on Posix
392 hosts) of the module files.
394 A module should export a C-callable function named
395 'emacs_module_init', which Emacs will call as part of the call to
396 'load' or 'require' which loads the module. It should also export a
397 symbol named 'plugin_is_GPL_compatible' to indicate that its code is
398 released under the GPL or compatible license; Emacs will refuse to
399 load modules that don't export such a symbol.
401 If a module needs to call Emacs functions, it should do so through the
402 API defined and documented in the header file 'emacs-module.h'. Note
403 that any module that provides Lisp-callable functions will have to use
404 Emacs functions such as 'fset' and 'funcall', in order to register its
405 functions with the Emacs Lisp interpreter.
407 Modules can create 'user-ptr' Lisp objects that embed pointers to C
408 structs defined by the module. This is useful for keeping around
409 complex data structures created by a module, to be passed back to the
410 module's functions. User-ptr objects can also have associated
411 "finalizers" -- functions to be run when the object is GC'ed; this is
412 useful for freeing any resources allocated for the underlying data
413 structure, such as memory, open file descriptors, etc. A new
414 predicate 'user-ptrp' returns non-nil if its argument is a 'user-ptr'
417 Loadable modules in Emacs are an experimental feature, and subject to
418 change in future releases. For that reason, their support is disabled
419 by default, and must be enabled by using the '--with-modules' option
423 ** A second dir-local file (.dir-locals-2.el) is now accepted.
424 See the variable 'dir-locals-file-2' for more information.
427 ** Network security (TLS/SSL certificate validity and the like) is
428 added via the new Network Security Manager (NSM) and controlled via
429 the 'network-security-level' variable.
432 ** International domain names (IDNA) are now encoded via the new
433 puny.el library, so that one can visit web sites with non-ASCII URLs.
436 ** C-h l now also lists the commands that were run.
438 ** The new M-s M-w key binding uses eww to search the web for the
442 ** The new 'timer-list' command lists all active timers in a buffer
443 where you can cancel them with the 'c' command.
445 ** M-x suggests shorthands and ignores obsolete commands for completion.
446 ** x-select-enable-clipboard is renamed select-enable-clipboard.
447 x-select-enable-primary and renamed select-enable-primary.
448 Additionally they both now apply to all systems (OSX, GNUstep, Windows, you
449 name it), with the proviso that on some systems (e.g. Windows)
450 select-enable-primary is ineffective since the system doesn't
451 have the equivalent of a primary selection.
454 ** New option 'switch-to-buffer-in-dedicated-window' allows you to
455 customize how 'switch-to-buffer' proceeds interactively when the
456 selected window is strongly dedicated to its buffer.
459 ** The option 'even-window-heights' has been renamed to
460 'even-window-sizes' and now handles window widths as well.
463 ** New function 'read-multiple-choice' use to prompt for
464 multiple-choice questions, with a handy way to display help texts.
467 ** terpri gets an optional arg ENSURE to conditionally output a newline.
470 ** 'insert-register' now leaves point after the inserted text
471 when called interactively. A prefix argument toggles this behavior.
474 ** The new variable 'term-file-aliases' replaces some files from lisp/term.
475 The function 'tty-run-terminal-initialization' consults this variable
476 when deciding what terminal-specific initialization code to run.
479 ** New variable 'system-configuration-features', listing some of the
480 main features that Emacs was compiled with. This is mainly intended
481 for use in Emacs bug reports.
484 ** A password is now hidden also when typed in batch mode. Another
485 hiding character but the default '.' can be used by let-binding the
486 variable 'read-hide-char'.
489 ** The Emacs pseudo-random number generator can be securely seeded.
490 On system where Emacs can access the system entropy or some other
491 cryptographically secure random stream, it now uses that when 'random'
492 is called with its argument 't'. This allows cryptographically strong
493 random values; in particular, the Emacs server now uses this facility
494 to produce its authentication key.
497 ** New input methods: 'tamil-dvorak' and 'programmer-dvorak'.
500 * Editing Changes in Emacs 25.1
503 ** M-x suggests shorthands and ignores obsolete commands for completion.
508 *** Successive single-char deletions are collapsed in the undo-log just like
509 successive char insertions. Which commands invoke this behavior is
510 controlled by the new 'undo-auto-amalgamate' function. See the node
511 "Undo" in the ELisp manual for more details.
514 *** The heuristic used to insert 'undo-boundary' after each command
515 has changed, so that if a command causes changes in more than just the
516 current buffer, Emacs now calls 'undo-boundary' in every buffer
517 affected by the command.
520 ** New command 'comment-line' bound to 'C-x C-;'.
522 ** New and improved facilities for inserting Unicode characters
525 *** Unicode names entered via C-x 8 RET now use substring completion by default.
528 *** C-x 8 now has shorthands for several chars, such as U+2010
529 (HYPHEN), U+2011 (NON-BREAKING HYPHEN), and U+2012 (FIGURE DASH). As
530 before, you can type C-x 8 C-h to list shorthands.
533 *** New minor mode electric-quote-mode for using curved quotes as you
534 type. See also the new variable 'text-quoting-style'.
537 ** New minor mode global-eldoc-mode is enabled by default.
540 ** Emacs now uses "bracketed paste mode" on text terminals that support it.
541 Bracketed paste mode causes text terminals to wrap pasted text in special
542 escape sequences that allow Emacs to tell the difference between text
543 you type and text you paste from other applications. Emacs then
544 avoids interpreting each character in the pasted text as it does with
545 keyboard input, which results in a paste experience similar to that
546 under a window system, and significant performance improvements when
547 pasting large amounts of text.
549 Bracketed paste mode is disabled by default, so Emacs automatically
550 enables it at startup if the terminal supports it.
553 ** Emacs now supports the latest version of the UBA.
554 The Emacs implementation of the Unicode Bidirectional Algorithm (UBA)
555 was updated to support all the latest additions and changes introduced
556 in Unicode Standard versions 6.3, 7.0, and the latest Unicode 8.0.
557 This includes full support for directional isolates and the
558 Bidirectional Parentheses Algorithm (BPA) specified by these Unicode
562 ** You can access 'mouse-buffer-menu' (C-down-mouse-1) using C-f10.
565 ** New buffer-local 'electric-pair-local-mode'.
568 ** New variable 'fast-but-imprecise-scrolling' inhibits
569 fontification during full screen scrolling operations, giving less
570 hesitant operation during auto-repeat of C-v, M-v at the cost of
571 possible inaccuracies in the end position.
574 ** New documentation command 'describe-symbol'.
575 Works for functions, variables, faces, etc. It is bound to 'C-h o' by
579 ** New function 'custom-prompt-customize-unsaved-options' checks for
580 unsaved customizations and prompts user to customize (if found). It
581 is intended for adding to 'kill-emacs-query-functions'.
584 ** The old 'C-x w' bindings in hi-lock-mode are officially deprecated
585 in favor of the global 'M-s h' bindings introduced in Emacs-23.1.
586 They'll disappear soon.
589 ** New bindings for 'query-replace-map'.
590 'undo', undo the last replacement; bound to 'u'.
591 'undo-all', undo all replacements; bound to 'U'.
594 * Changes in Specialized Modes and Packages in Emacs 25.1
599 *** New command 'checkdoc-package-keywords' checks if the
600 current package keywords are recognized. Set the new option
601 'checkdoc-package-keywords-flag' to non-nil to make
602 'checkdoc-current-buffer' call this function automatically.
605 *** New function 'checkdoc-file' checks for style errors.
606 It's meant for use together with 'compile':
607 emacs -batch --eval "(checkdoc-file \"subr.el\")"
612 *** The desktop format version has been upgraded from 206 to 208.
613 Although Emacs 25.1 can read a version 206 desktop, earlier Emacsen
614 cannot read a version 208 desktop. To upgrade your desktop file, you
615 must explicitly request the upgrade, by C-u M-x desktop-save. You are
616 recommended to do this as soon as you have firmly upgraded to Emacs
617 25.1 (or later). Should you ever need to downgrade your desktop file
618 to version 206, you can do this with C-u C-u M-x desktop-save.
621 ** New function 'bookmark-set-no-overwrite' bound to C-x r M.
622 It raises an error if a bookmark of that name already exists,
623 unlike 'bookmark-set' which silently updates an existing bookmark.
628 *** New user options 'mm-html-inhibit-images' and 'mm-html-blocked-images'
629 now control how mm-* functions fetch and display images in an HTML
630 message. Gnus still uses 'gnus-inhibit-images' and 'gnus-blocked-images'
631 for that purpose, i.e., binds mm-html- variables with those gnus-
632 variables, but other packages do not have to bind gnus- variables now.
635 *** 'mm-inline-text-html-with-images' has been removed.
636 Use 'mm-html-inhibit-images' instead. Note that the value is opposite
642 *** 'imap-ssl-program' has been removed, and imap.el uses the internal
643 GnuTLS encryption functions if possible.
648 *** 'json-pretty-print' and 'json-pretty-print-buffer' now maintain
649 the ordering of object keys by default.
652 *** New commands 'json-pretty-print-ordered' and
653 'json-pretty-print-buffer-ordered' pretty prints JSON objects with
654 object keys sorted alphabetically.
657 ** Prog mode has some support for multi-mode indentation.
658 This allows better indentation support in modes that support multiple
659 programming languages in the same buffer, like literate programming
660 environments or ANTLR programs with embedded Python code.
662 A major mode can provide indentation context for a sub-mode through
663 the 'prog-indentation-context' variable. To support this, modes that
664 provide indentation should use 'prog-widen' instead of 'widen' and
665 'prog-first-column' instead of a literal zero. See the node
666 "Mode-Specific Indent" in the ELisp manual for more details.
668 ** Prettify Symbols mode
671 *** Prettify Symbols mode supports custom composition predicates. By
672 overriding the default 'prettify-symbols-compose-predicate', modes can
673 specify in which contexts a symbol may be displayed as some Unicode
674 character. 'prettify-symbols-default-compose-p' is the default which
675 is suitable for most programming languages such as C or Lisp (but not
679 *** Symbols can be unprettified while point is inside them.
680 New variable 'prettify-symbols-unprettify-at-point' configures this.
682 ** Enhanced xterm support
685 *** The new variable 'xterm-screen-extra-capabilities' for configuring xterm.
686 This variable tells Emacs which advanced capabilities are available in
687 the xterm terminal emulator used to display Emacs text-mode frames.
688 The default is to check each capability, and use it if available.
689 (This variable was introduced in Emacs 24.1, but was not announced in
693 *** Killing text now also sets the CLIPBOARD/PRIMARY selection
694 in the surrounding GUI (using the OSC-52 escape sequence). This only works
695 if your xterm supports it and enables the 'allowWindowOps' options (disabled
696 by default at least in Debian, for security reasons).
698 Similarly, you can yank the CLIPBOARD/PRIMARY selection (using the OSC-52
699 escape sequence) if your xterm has the feature enabled but for that you
700 additionally need to add 'getSelection' to 'xterm-extra-capabilities'.
703 *** 'xterm-mouse-mode' now supports mouse-tracking (if your xterm supports it).
706 ** The way to turn on and off 'save-place' mode has changed.
707 It is no longer sufficient to load the saveplace library and set
708 'save-place' non-nil. Instead, use the two new minor modes:
709 'save-place-mode' turns on saving last place in every file, and
710 'save-place-local-mode' does that only for the file in whose buffer it
711 is invoked. The 'save-place' variable is now an obsolete alias for
712 'save-place-mode', which replaces it, and 'toggle-save-place' is an
713 obsolete alias for the new 'save-place-local-mode' command.
718 *** ERC can now hide message types by network or channel.
719 'erc-hide-list' will hide all messages of the specified type, while
720 'erc-network-hide-list' and 'erc-channel-hide-list' will only hide the
721 specified message types for the respective specified targets.
723 *** New variable 'erc-default-port-tls' used to connect to TLS IRC
727 *** Reconnection is now asynchronous.
730 *** Nick completion is now case-insensitive again after inadvertently
731 being made case-sensitive in Emacs 24.2.
736 *** New commands, key binds, and menu items.
738 **** '<' and '>' for navigating previous and next tracks in playlist
740 **** New play/pause command 'mpc-toggle-play' bound to 's'
742 **** 'g' bound to new command 'mpc-seek-current' will navigate current
745 **** New commands 'mpc-toggle-{consume,repeat,single,shuffle}' for
746 toggling playback modes.
749 *** Now supports connecting to a UNIX domain socket.
752 *** Looks at more image file names to use as album art.
753 Case-insensitively tries for .folder.png (freedesktop) and folder.jpg
754 (XP) in addition to cover.jpg.
757 *** Searches in more locations for MPD configuration files.
758 MPD supports the XDG base directory specification since version 0.17.6.
763 *** 'midnight-mode' is now a proper minor mode.
766 *** clean-buffer-*-regexps can now specify buffers via predicate functions.
771 *** New "external" package status.
772 An external package is any installed package that's not built-in and
773 not from 'package-user-dir', which usually means it's from an entry in
774 'package-directory-list'. They are treated much like built-in
775 packages, in that they cannot be deleted through the package menu and
776 are not considered for upgrades.
778 The effect is that a user can manually place a specific version of a
779 package inside 'package-directory-list' and the package menu will
783 *** If a package is available on multiple archives and one has higher
784 priority (as per 'package-archive-priorities') only that one is
785 listed. This can be configured with 'package-menu-hide-low-priority'.
788 *** 'package-menu-toggle-hiding' now toggles the hiding of packages.
789 This includes the above-mentioned low-priority packages, as well as
790 available packages whose version is lower than the currently installed
791 version (which were previously impossible to display).
792 This allows users to downgrade a package if a lower version is
796 *** When filtering the package menu, keywords starting with "arc:" or
797 "status:" represent package archive or status, respectively, instead
801 *** Most functions which involve downloading information now take an
802 ASYNC argument. If it is non-nil, package.el performs the download(s)
806 *** New variable 'package-menu-async' controls whether the
807 package-menu uses asynchronous downloads.
810 *** 'package-install-from-buffer' and 'package-install-file' work on directories.
811 This follows the same rules as installing from a .tar file, except the
812 -pkg file is optional.
815 *** Packages which are dependencies of other packages cannot be deleted.
816 The FORCE argument to 'package-delete' overrides this.
819 *** New custom variable 'package-selected-packages' tracks packages
820 which were installed by the user (as opposed to installed as
821 dependencies). This variable can also be manually customized.
824 *** New command 'package-install-selected-packages' installs all
825 packages from 'package-selected-packages' which are currently missing.
828 *** 'package-install' function now takes a DONT-SELECT argument. If
829 this function is called interactively or if DONT-SELECT is nil, add the
830 package being installed to 'package-selected-packages'.
833 *** New command 'package-autoremove' removes all packages which were
834 installed strictly as dependencies but are no longer needed.
839 When you invoke 'shell' interactively, the *shell* buffer will now
840 display in a new window. However, you can customize this behavior via
841 the 'display-buffer-alist' variable. For example, to get
842 the old behavior -- *shell* buffer displays in current window -- use
843 (add-to-list 'display-buffer-alist
844 '("^\\*shell\\*$" . (display-buffer-same-window))).
848 *** The ':protection' slot option is not obeyed any more.
850 *** The 'newname' argument to constructors is optional&deprecated.
851 If you need your objects to be named, do it by inheriting from 'eieio-named'.
853 *** The <class>-list-p and <class>-child-p functions are declared obsolete.
855 *** The <class> variables are declared obsolete.
857 *** The <initarg> variables are declared obsolete.
859 *** defgeneric and defmethod are declared obsolete.
860 Use the equivalent facilities from cl-generic.el instead.
862 *** 'constructor' is now an obsolete alias for 'make-instance'.
863 --- 'pcase' accepts a new UPattern 'eieio'.
868 *** New command 'ido-bury-buffer-at-head' bound to C-S-b
869 Bury the buffer at the head of 'ido-matches', analogous to how C-k
870 kills the buffer at head.
873 *** A prefix argument to 'ido-restrict-to-matches' will reverse its
874 meaning, and the list is restricted to those elements that do not
875 match the current input.
880 *** You can use <UP> and <DOWN> arrow keys to move through history by lines.
881 The new commands 'next-line-or-history-element' and
882 'previous-line-or-history-element', bound to <UP> and <DOWN> in the
883 minibuffer, allow by-line movement through minibuffer history,
884 similarly to an ordinary buffer. Only when point moves over
885 the bottom/top of the minibuffer it goes to the next/previous history
886 element. 'M-p' and 'M-n' still move directly to previous/next history
889 ** Search and Replace
892 *** 'isearch' and 'query-replace' can now perform character folding in matches.
893 This is analogous to case folding, but instead of disregarding case
894 variants, it disregards wider classes of distinctions between similar
895 characters. (Case folding is a special case of character folding.)
896 This means many characters in the search string will match entire
897 groups of characters instead of just themselves.
899 For instance, the ASCII double quote character " will match all
900 variants of double quotes, and the letter 'a' will match all of its
901 accented cousins, even those composed of multiple characters, as well
902 as many other symbols like U+249C (PARENTHESIZED LATIN SMALL LETTER
905 Character folding is enabled by customizing 'search-default-mode' to
906 the value 'character-fold-to-regexp'. You can also toggle character
907 folding in the middle of a search by typing 'M-s ''.
909 'query-replace' honors character folding if the new variable
910 'replace-character-fold' is customized to a non-nil value.
913 *** New user option 'search-default-mode'.
914 This option specifies the default mode for Isearch. The default
915 value, nil specifies that Isearch does literal searches (however,
916 'case-fold-search' and 'isearch-lax-whitespace' may still be applied,
917 as in previous Emacs versions).
920 *** New function 'character-fold-to-regexp' can be used
921 by searching commands to produce a regexp matching anything that
922 character-folds into STRING.
925 *** The new M-s M-w key binding uses eww to search the web for the
926 text in the region. The search engine to use for this is specified by
927 the customizable variable 'eww-search-prefix'.
930 *** Query-replace history is enhanced.
931 When query-replace reads the FROM string from the minibuffer, typing
932 'M-p' will now show previous replacements as "FROM SEP TO", where FROM
933 and TO are the original text and its replacement, and SEP is an arrow
934 string defined by the new variable 'query-replace-from-to-separator'.
935 To select a prior replacement, type 'M-p' until the desired
936 replacement appears in the minibuffer, and then exit the minibuffer by
941 *** If 'quick-calc' is called with a prefix argument, insert the
942 result of the calculation into the current buffer.
945 ** In Edebug, you can now set the initial mode with C-x C-a C-m. With
946 this you can tell Edebug not to stop at the start of the first
947 instrumented function.
952 *** New minor mode 'global-eldoc-mode'
953 It is turned on by default, and affects '*scratch*' and other buffers
954 whose major mode supports Emacs Lisp.
957 *** 'eldoc-documentation-function' now defaults to 'ignore'
960 *** 'describe-char-eldoc' displays information about character at point,
961 and can be used as a default value of 'eldoc-documentation-function'. It is
962 useful when, for example, one needs to distinguish various spaces - e.g.,
963 U+00A0 (NO-BREAK SPACE), U+2002 (EN SPACE), and U+2009 (THIN SPACE) - while
964 using mono-spaced font.
969 *** HTML can now be rendered using variable-width fonts.
972 *** A new command 'F' ('eww-toggle-fonts') can be used to toggle
973 whether to use variable-pitch fonts or not. The user can also
974 customize the 'shr-use-fonts' variable.
977 *** A new command 'C' ('eww-toggle-colors') can be used to toggle
978 whether to use the HTML-specified colors or not. The user can also
979 customize the 'shr-use-colors' variable.
982 *** A new command 'R' ('eww-readable') will try do identify the main
983 textual parts of a web page and display only that, leaving menus and
984 the like off the page.
987 *** A new command 'D' ('eww-toggle-paragraph-direction') allows you to
988 toggle the paragraph direction between left-to-right and right-to-left.
991 *** Images that are being loaded are now marked with grey
992 "placeholder" images of the size specified by the HTML. They are then
993 replaced by the real images asynchronously, which will also now
994 respect width/height HTML specs (unless they specify widths/heights
995 bigger than the current window).
998 *** You can now use several eww buffers in parallel by renaming eww
999 buffers you want to keep separate.
1002 *** Partial state of the eww buffers (the URIs and the titles of the
1003 pages visited) is now preserved in the desktop file.
1006 *** 'eww-after-render-hook' is now called after eww has rendered
1007 the data in the buffer.
1010 *** The 'eww-reload' command now takes a prefix to not reload via
1011 the net, but just use the local copy of the HTML.
1014 *** The DOM shr and eww uses has been changed to the general Emacs
1015 xml.el/libxml2 DOM, and a new package dom.el has been added to
1016 interact with this DOM. See the Emacs Lisp manual for interface
1020 *** 'mailcap-mime-data' is now consulted when displaying PDF files.
1023 *** The new 'S' command will list all eww buffers, and allow managing
1027 *** https pages with valid certificates have headers marked in green, while
1028 invalid certificates are marked in red.
1033 *** text/html messages that contain inline image parts will be
1034 transformed into multipart/related messages before sending.
1037 *** The 'message-valid-fqdn-regexp' variable has been removed, since
1038 there are now top-level domains added all the time. Message will no
1039 longer warn about sending emails to top-level domains it hasn't heard
1042 *** 'message-beginning-of-line' (bound to C-a) understands folded headers.
1043 In 'visual-line-mode' it will look for the true beginning of a header
1044 while in non-'visual-line-mode' it will move the point to the indented
1048 ** In Show Paren Mode, a parenthesis can be highlighted when point
1049 stands inside it, and certain parens can be highlighted when point is
1050 at BOL or EOL, or in whitespace there. To enable these, customize,
1051 respectively, 'show-paren-when-point-inside-paren' or
1052 'show-paren-when-point-in-periphery'.
1055 ** If gpg2 exists on the system, it is now used as the default value
1056 of 'epg-gpg-program' (instead of gpg).
1061 *** Images are automatically scaled before displaying based on the
1062 'image-scaling-factor' variable (if Emacs supports scaling the images
1066 *** Images inserted with 'insert-image' and related functions get a
1067 keymap put into the text properties (or overlays) that span the
1068 image. This keymap binds keystrokes for manipulating size and
1069 rotation, as well as saving the image to a file. These commands are
1070 also available in 'image-mode'.
1073 *** A new library for creating and manipulating SVG images has been
1074 added. See the "SVG Images" section in the lispref manual for
1078 *** New setf-able function to access and set image parameters is
1079 provided: 'image-property'.
1085 *** Strings after ':documentation' are highlighted as docstrings.
1086 This enhances Lisp mode fontification to handle documentation of the
1087 form '(:documentation "the doc string")' used in Common Lisp code for
1088 CLOS class and slot documentation.
1090 ** Rectangle editing
1093 *** Rectangle Mark mode can have corners past EOL or in the middle of a TAB.
1096 *** C-x C-x in rectangle-mark-mode now cycles through the four corners.
1097 *** 'string-rectangle' provides on-the-fly preview of the result.
1100 ** New font-lock functions 'font-lock-ensure' and 'font-lock-flush'.
1101 These should be used in preference to 'font-lock-fontify-buffer' when
1105 ** Macro 'minibuffer-with-setup-hook' can optionally append a function
1106 to 'minibuffer-setup-hook'.
1108 If the first argument of the macro is of the form '(:append FUN)',
1109 then FUN will be appended to 'minibuffer-setup-hook', instead of
1114 *** New functions 'cl-fresh-line', 'cl-digit-char-p', and 'cl-parse-integer'.
1117 *** 'pcase' accepts the new UPattern 'cl-struct'.
1119 ** Calendar and diary
1122 *** The default 'diary-file' is now located in .emacs.d.
1125 *** New commands to insert diary entries with Chinese dates:
1126 'diary-chinese-insert-anniversary-entry' 'diary-chinese-insert-entry'
1127 'diary-chinese-insert-monthly-entry', 'diary-chinese-insert-yearly-entry'.
1130 *** The calendar can now list and mark diary entries with Chinese dates.
1131 See 'diary-chinese-list-entries' and 'diary-chinese-mark-entries'.
1134 *** The option 'calendar-mode-line-format' can now be nil,
1135 which means to do nothing special with the mode line in calendars.
1138 *** New option 'calendar-weekend-days'.
1139 The option customizes which day headers receive the
1140 'calendar-weekend-header' face.
1143 *** New optional args N and STRING for 'holiday-greek-orthodox-easter'.
1146 *** Many items obsolete since at least version 23.1 have been removed.
1147 The majority were function/variable/face aliases, too numerous to list here.
1150 **** Functions 'calendar-one-frame-setup', 'calendar-only-one-frame-setup',
1151 'calendar-two-frame-setup', 'european-calendar', 'american-calendar'.
1153 **** Hooks 'cal-menu-load-hook', 'cal-x-load-hook'.
1155 **** Macro 'calendar-for-loop'.
1157 **** Variables 'european-calendar-style', 'diary-face', 'hebrew-holidays-{1,4}'.
1159 **** The nil and list forms of 'diary-display-function'.
1162 ** New ERT function 'ert-summarize-tests-batch-and-exit'.
1163 If the output of ERT tests in batch mode execution can be saved to a
1164 log file, then it can be passed as an argument to the above function
1165 to produce a neat summary.
1168 ** New js.el option 'js-indent-first-init'.
1173 ** Info mode now displays symbol names in fixed-pitch font.
1174 If you want to get the old behavior back, customize the 'Info-quoted'
1175 face to use the same definitions as the default face.
1178 *** 'Info-fontify-maximum-menu-size' can be t for no limit.
1181 *** 'info-display-manual' can now be given a prefix argument which (any
1182 non-nil value) directs the command to limit the completion
1183 alternatives to currently visited manuals.
1186 ** ntlm.el has support for NTLM2.
1191 *** The Rmail commands 'd', 'C-d' and 'u' take optional repeat counts
1192 to delete or undelete multiple messages.
1195 *** Rmail can now render HTML mail messages if your Emacs was built with
1196 libxml2 or if you have the Lynx browser installed. By default, Rmail
1197 will display the HTML version of a mail message that has both HTML and
1198 plain text parts, if display of HTML email is possible; customize the
1199 'rmail-mime-prefer-html' option to 'nil' if you don't want that.
1202 *** In the commands that make summaries by subject, recipients, or senders,
1203 you can no longer use commas to separate regular expressions.
1206 ** SES now supports local printer functions; see 'ses-define-local-printer'.
1208 ** Shell-script Mode
1210 *** In sh-mode you can now use 'sh-shell' as a file-local variable to
1211 specify the type of shell in use (bash, csh, etc).
1214 *** New value 'always' for 'sh-indent-after-continuation'.
1215 This provides old-style ("dumb") indentation of continued lines.
1216 See the doc string of 'sh-indent-after-continuation' for details.
1220 *** Fatal TLS errors are now silent by default.
1223 *** If Emacs isn't built with TLS support, an external TLS-capable
1224 program is used instead. This program used to be run in --insecure
1225 mode by default, but has now changed to be secure instead, and will
1226 fail if you try to connect to non-verifiable hosts. This is
1227 controlled by the 'tls-program' variable.
1232 *** The URL package accepts now the protocols "ssh", "scp" and "rsync".
1233 When 'url-handler-mode' is enabled, file operations for these
1234 protocols as well as for "telnet" and "ftp" are passed to Tramp.
1237 *** The URL package allows customizing the 'url-user-agent' string.
1238 The new 'url-user-agent' variable can be customized to be a string or
1242 *** The new interface variable 'url-request-noninteractive' can be used
1243 to specify that we're running in a noninteractive context, and that
1244 we should not be queried about things like TLS certificate validity.
1247 *** 'url-mime-accept-string' can now be used as in "interface"
1248 variable, meaning you can bind it around an 'url-retrieve' call.
1251 *** If URL is used with a https connection, the first callback argument
1252 plist will contain a :peer element that has the output of
1253 'gnutls-peer-status' (if Emacs is built with GnuTLS support).
1256 *** The new function 'url-cookie-delete-cookie' can be used to
1257 programmatically delete all cookies, or cookies from a specific
1260 *** The URL package now support https over proxies supporting CONNECT.
1265 *** New connection method "afp", which allows you to access Mac OS X
1266 volumes via the Apple Filing Protocol.
1269 *** New connection method "nc", which allows you to access dumb
1273 *** Method-specific parameters can be overwritten now with variable
1274 'tramp-connection-properties'.
1277 *** Handler for 'file-notify-valid-p' for remote machines that support
1278 filesystem notifications.
1283 *** New user variable 'sql-default-directory' enables remote
1284 connections using Tramp.
1287 *** New command 'sql-send-line-and-next'.
1288 This command, bound to 'C-c C-n' by default, sends the current line to
1289 the SQL process and advances to the next line, skipping whitespace and
1293 *** Added support for Vertica SQL.
1295 ** VC and related modes
1298 *** Basic push support, via 'vc-push', bound to 'C-x v P'.
1299 Implemented for Bzr, Git, Hg. As part of this change, the pre-existing
1300 (undocumented) command vc-hg-push now behaves slightly differently.
1303 *** The new command vc-region-history shows the log+diff of the active region.
1306 *** You can refresh the VC state of a file buffer with 'M-x vc-refresh-state'.
1307 This command is useful when you perform version control commands
1308 outside Emacs (e.g., from the shell prompt), or if you switch the VC
1309 back-end for the buffer's file, or remove it from version control.
1312 *** The VC state indicator in the mode line now defaults to more
1313 colorful faces to make it more obvious to the user what the state is.
1314 See the 'vc-faces' customization group.
1317 *** New option 'vc-annotate-background-mode' controls whether
1318 the color range from 'vc-annotate-color-map' is applied to the
1319 background or to the foreground.
1322 *** New options for customizing encoding of Git commit log messages.
1323 The new options `vc-git-commits-coding-system' and
1324 `vc-git-log-output-coding-system' allow to customize the encoding of
1325 the log messages sent to Git when committing, and the decoding of the
1326 log messages read from Git history commands. Both default to UTF-8;
1327 if you customize them, make sure they are consistent with the Git
1328 config variables i18n.commitEncoding and i18n.logOutputEncoding.
1329 (`vc-git-commits-coding-system' existed previously, but was a
1330 variable, not a user option.)
1333 *** 'compare-windows' now compares text with the most recently selected window
1334 instead of the next window. If you want the previous behavior of
1335 comparing with the next window, customize the new option
1336 'compare-windows-get-window-function' to the value
1337 'compare-windows-get-next-window'.
1340 *** Two new faces 'compare-windows-removed' and 'compare-windows-added'
1341 replace the face 'compare-windows', which is now an obsolete alias for
1342 'compare-windows-added'.
1345 *** The VC state indicator in the mode line now has different faces
1346 corresponding to each of the possible states. See the 'vc-faces'
1347 customization group.
1350 *** 'log-edit-insert-changelog' converts "(tiny change)" to
1351 "Copyright-paperwork-exempt: yes". Set 'log-edit-rewrite-tiny-change'
1352 nil to disable this.
1355 ** VHDL mode now supports VHDL'08.
1360 *** Decimal display mode uses "," groups, so it's more
1361 fitting for use in money calculations
1364 *** Factorial works with non-integer inputs.
1369 *** Hide-IfDef mode now support full C/C++ expressions in macros,
1370 macro argument expansion, interactive macro evaluation and automatic
1371 scanning of #define'd symbols.
1374 *** New command 'hif-evaluate-macro', bound to 'C-c @ e', displays the
1375 result of evaluating a macro.
1378 *** New command 'hif-clear-all-ifdef-define', bound to 'C-c @ C', clears
1379 all defined symbols in 'hide-ifdef-env'.
1382 *** New custom variable 'hide-ifdef-header-regexp' to define C/C++ header
1383 file name patterns. Defaults to files whose extension is one of '.h',
1384 '.hh', '.hpp', '.hxx', or '.h++', matched case-insensitively.
1387 *** New custom variable 'hide-ifdef-expand-reinclusion-protection' to prevent
1388 reinclusion protected (a.k.a. "idempotent") header files from being hidden.
1389 (This could happen when an idempotent header file is visited again,
1390 when its guard symbol is already defined.) Defaults to 't'.
1393 *** New custom variable 'hide-ifdef-exclude-define-regexp' to define symbol
1394 name patterns (e.g. all "FOR_DOXYGEN_ONLY_*") to be ignored when
1395 looking for macro definitions. By default, no symbols are ignored.
1400 *** New custom variable 'tex-print-file-extension' to help users who
1401 use PDF instead of DVI.
1404 *** TeX mode now supports Prettify Symbols mode. When enabling
1405 'prettify-symbols-mode' in a tex-mode buffer, \alpha ... \omega, and
1406 many other math macros are displayed using unicode characters.
1409 ** New 'big-indent' style in 'whitespace-mode' highlights deep indentation.
1410 By default, 32 consecutive spaces or four consecutive TABs are
1411 considered to be too deep, but the new variable
1412 'whitespace-big-indent-regexp' can be customized to change that.
1415 ** New options in 'tildify-mode'.
1416 New options 'tildify-space-string', 'tildify-pattern', and
1417 'tildify-foreach-region-function' variables make
1418 'tildify-string-alist', 'tildify-pattern-alist', and
1419 'tildify-ignored-environments-alist' variables (as well as a few
1420 helper functions) obsolete.
1423 ** New package Xref replaces Etags's front-end and UI
1425 The new package Xref provides a generic framework and new commands to
1426 find and move to definitions of functions, macros, data structures
1427 etc., as well as go back to the location where you were before moving
1428 to a definition. It supersedes and obsoletes many Etags commands,
1429 while still using the etags.el code that reads the TAGS tables as one
1432 The command 'xref-find-definitions' replaces 'find-tag' and provides
1433 an interface to pick one definition among several.
1434 'tags-loop-continue' is now unbound. 'xref-pop-marker-stack' replaces
1435 'pop-tag-mark', but has a keybinding ('M-,') different from the one
1436 'pop-tag-mark' used.
1438 'xref-find-definitions-other-window' replaces 'find-tag-other-window'.
1439 'xref-find-definitions-other-frame' replaces 'find-tag-other-frame'.
1440 'xref-find-apropos' replaces 'find-tag-regexp'.
1442 As a result of this, the following commands are now obsolete:
1443 'find-tag-other-window', 'find-tag-other-frame', 'find-tag-regexp',
1446 'tags-loop-continue' is not obsolete because it's still useful in
1447 'tags-search' and 'tags-query-replace', for which there are no direct
1451 *** Variants of 'tags-search' and 'tags-query-replace' in Dired were also
1452 replaced by xref-style commands, see the "Dired" section below.
1457 'find-tag-marker-ring-length' is now an obsolete alias for
1458 'xref-marker-ring-length'. 'find-tag-marker-ring' is now an obsolete
1459 alias for a private variable. 'xref-push-marker-stack' and
1460 'xref-pop-marker-stack' should be used instead to manipulate the stack
1461 of searches for definitions.
1464 *** 'xref-find-definitions' and 'describe-function' now display
1465 information about mode local overrides (defined by cedet/mode-local.el
1466 'define-overloadable-function' 'define-mode-local-overrides').
1468 The framework's Lisp API is still experimental and can change in major,
1469 backward-incompatible ways.
1472 ** New package Project
1474 The new package Project provides generic infrastructure for dealing
1475 with projects. The main commands included in it are
1476 'project-find-file' and 'project-find-regexp'.
1478 The Lisp API of this package is still experimental.
1481 EUDC's LDAP backend has been improved.
1484 *** EUDC supports LDAP-over-SSL URLs (ldaps://).
1487 *** EUDC passes LDAP passwords through a pipe to the ldapsearch
1488 subprocess instead of on the command line.
1491 *** EUDC handles LDAP wildcards automatically so the user shouldn't
1492 need to configure this manually anymore.
1495 *** The LDAP configuration section of EUDC's manual has been
1498 There have also been customization changes.
1501 *** New custom variable 'eudc-server-hotlist' to allow specifying
1502 multiple EUDC servers in init file.
1505 *** Custom variable 'eudc-inline-query-format' defaults to completing
1506 on email and firstname instead of surname.
1509 *** Custom variable 'eudc-expansion-overwrites-query' defaults to nil
1510 to avoid interfering with the kill ring.
1513 *** Custom variable 'eudc-inline-expansion-format' defaults to
1514 "Firstname Surname <mail-address>".
1517 *** Custom variable 'eudc-options-file' defaults to
1518 "~/.emacs.d/eudc-options".
1521 *** New custom variable 'ldap-ldapsearch-password-prompt-regexp' to
1522 allow overriding the regular expression that recognizes the ldapsearch
1523 command line's password prompt.
1526 EUDC's BBDB backend now supports BBDB 3.
1529 EUDC's PH backend (eudcb-ph.el) is obsolete.
1534 *** The new built-in command 'clear' can scroll window contents out of sight.
1535 If provided with an optional non-nil argument, the scrollback contents will be cleared.
1538 *** New buffer syntax '#<buffer-name>', which is equivalent to
1539 '#<buffer buffer-name>'. This shorthand makes interacting with
1540 buffers from eshell more convenient. Custom variable
1541 'eshell-buffer-shorthand', which has been broken for a while, has been
1545 *** By default, eshell "visual" program buffers (created by
1546 'eshell-visual-commands' and similar custom vars) are no longer killed
1547 when their processes die. This fixes issues with short-lived commands
1548 and makes visual programs more useful in general. For example, if
1549 "git log" is a visual command, it will always show the visual command
1550 buffer, even if the "git log" process dies. For the old behavior,
1551 make the new option 'eshell-destroy-buffer-when-process-dies' non-nil.
1556 *** Support for the Google Chrome web browser.
1559 *** Support for the Conkeror web browser.
1562 *** Support for several ancient browsers is now officially obsolete.
1565 ** tar-mode: new 'tar-new-entry' command, allowing for new members to
1566 be added to the archive.
1571 *** Dired buffers are also auto-reverted via file notifications, if
1572 Emacs is compiled with file notification support.
1575 *** 'auto-revert-use-notify' is set to nil in 'global-auto-revert-mode'.
1576 See <http://debbugs.gnu.org/22814>.
1578 ** File Notifications
1581 *** The kqueue library is integrated for *BSD and Mac OS X machines.
1584 *** The new event 'stopped' signals, that a file notification watch is
1585 not active any longer.
1588 *** The new function 'file-notify-valid-p' checks, whether a file
1589 notification descriptor still corresponds to an activate watch.
1594 *** The command 'dired-do-compress' bound to 'Z' now can compress
1595 directories and decompress zip files.
1598 *** New command 'dired-do-compress-to' bound to 'c' can be used to
1599 compress many marked files into a single named archive. The
1600 compression command is determined from the new
1601 'dired-compress-files-alist' variable.
1604 *** In wdired, when editing files to contain slash characters,
1605 the resulting directories are automatically created. Whether
1606 to do this or not is controlled by the
1607 'wdired-create-parent-directories' variable.
1610 *** 'W' is now bound to 'browse-url-of-dired-file', and is useful for
1611 viewing HTML files and the like.
1613 *** New user interface for the 'A' and 'Q' commands.
1614 These keys, now bound to 'dired-do-find-regexp' and
1615 'dired-do-find-regexp-and-replace', work similarly to 'xref-find-apropos'
1616 and 'xref-query-replace-in-results': they present the matches
1617 in the '*xref*' buffer and let you move through the matches. No need
1618 to use 'tags-loop-continue' to resume the search or replace loop. The
1619 previous commands, 'dired-do-search' and
1620 'dired-do-query-replace-regexp', are still available, but not bound to
1621 keys; rebind 'A' and 'Q' to invoke them if you want the old behavior
1622 back. We intend to obsolete the old commands in a future release.
1624 ** Tabulated List Mode
1627 *** It is now safe for a mode that derives 'tabulated-list-mode' to not
1628 call 'tabulated-list-init-header', in which case it will have no
1632 *** 'tabulated-list-print' takes a second optional argument, update,
1633 which specifies an alternative printing method which is faster when
1634 few or no entries have changed.
1636 ** Obsolete packages
1642 *** landmark.el (moved to elpa.gnu.org)
1645 * New Modes and Packages in Emacs 25.1
1648 ** pinentry.el allows GnuPG passphrase to be prompted through the
1649 minibuffer instead of a graphical dialog, depending on whether the gpg
1650 command is called from Emacs (i.e., INSIDE_EMACS environment variable
1651 is set). This feature requires newer versions of GnuPG (2.1.5 or
1652 later) and Pinentry (0.9.5 or later). To use this feature, add
1653 "allow-emacs-pinentry" to "~/.gnupg/gpg-agent.conf" and reload the
1654 configuration with "gpgconf --reload gpg-agent".
1657 ** cl-generic.el provides CLOS-style multiple-dispatch generic functions.
1658 The main entry points are 'cl-defgeneric' and 'cl-defmethod'. See the
1659 node "Generic Functions" in the Emacs Lisp manual for more details.
1662 ** scss-mode (a minor variant of css-mode) is a major mode for editing
1663 SCSS (Sassy CSS) files.
1666 ** let-alist is a new macro (and a package) that allows one to easily
1667 let-bind the values stored in an alist.
1670 ** 'tildify-mode' allows automatic insertion of hard spaces as one
1671 types the text. Breaking line after a single-character words is
1672 forbidden by Czech and Polish typography (and may be discouraged in
1673 other languages), so 'auto-tildify-mode' makes it easier to create
1674 a typographically-correct documents.
1677 ** The 'seq' library adds sequence manipulation functions and macros
1678 that complement basic functions provided by subr.el. All functions
1679 are prefixed with 'seq-' and work on lists, strings and vectors.
1680 'pcase' accepts a new Upattern 'seq'.
1683 ** The 'map' library provides map-manipulation functions that work on
1684 alists, hash-table and arrays. All functions are prefixed with
1685 'map-'. 'pcase' accepts a new UPattern 'map'.
1688 ** The 'thunk' library provides functions and macros to control the
1689 evaluation of forms.
1692 ** js-jsx-mode (a minor variant of js-mode) provides indentation
1693 support for JSX, an XML-like syntax extension to ECMAScript.
1696 * Incompatible Lisp Changes in Emacs 25.1
1699 ** 'setq' and 'setf' must now be called with an even number of
1700 arguments. The earlier behavior of silently supplying a nil to the
1701 last variable when there was an odd number of arguments has been
1705 ** 'syntax-begin-function' is declared obsolete.
1706 Removed font-lock-beginning-of-syntax-function and the SYNTAX-BEGIN
1707 slot in font-lock-defaults.
1710 ** The new implementation of Subword mode affects word movement everywhere.
1711 When Subword mode is turned on, 'forward-word', 'backward-word', and
1712 everything that uses them will move by sub-words, effectively
1713 overriding the buffer's syntax table. Lisp programs that shouldn't be
1714 affected by Subword mode should call the new functions
1715 'forward-word-strictly' and 'backward-word-strictly' instead.
1718 ** 'package-initialize' now sets 'package-enable-at-startup' to nil if
1719 called during startup. Users who call this function in their init
1720 file and still expect it to be run after startup should set
1721 'package-enable-at-startup' to t after the call to
1722 'package-initialize'.
1725 ** ':global' minor mode use 'setq-default' rather than 'setq'.
1726 This means that you can't use 'make-local-variable' and expect them to
1727 "magically" become buffer-local.
1730 ** 'track-mouse' no longer freezes the shape of the mouse pointer.
1731 The 'track-mouse' form no longer refrains from changing the shape of
1732 the mouse pointer for the entire time the body of that form is
1733 executed. Lisp programs that use 'track-mouse' for dragging across
1734 large portions of the Emacs display, and want to avoid changes in the
1735 pointer shape during dragging, should bind the variable 'track-mouse'
1736 to the special value 'dragging' in the body of the form.
1739 ** The optional 'predicate' argument of 'lisp-complete-symbol' no longer
1740 has any effect. (This change was made in Emacs 24.4 but was not
1741 advertised at the time.)
1744 ** 'indirect-function' does not signal 'void-function' any more.
1745 This is mostly a bug-fix, since this change was missed back in 24.4 when
1746 symbol-function was changed not to signal 'void-function' any more.
1749 *** As a consequence, the second arg of 'indirect-function' is now obsolete.
1752 ** M-x shell and M-x compile no longer set the EMACS environment variable.
1753 This avoids clashing when other programs use the variable for other purposes.
1754 Although M-x term still sets EMACS for compatibility with Bash 4.3 and earlier,
1755 this is deprecated and will be phased out when Bash 4.4 or later takes over.
1756 Use the INSIDE_EMACS environment variable instead.
1758 ** 'C-up', 'C-down', 'C-left' and 'C-right' are now defined in term
1759 mode to send the same escape sequences that xterm does. This makes
1760 things like forward-word in readline work.
1763 ** hideshow mode got four key bindings that are analogous to outline
1764 mode bindings: 'C-c @ C-a', 'C-c @ C-t', 'C-c @ C-d', and 'C-c @ C-e.'
1767 ** 'save-excursion' does not save&restore the mark any more.
1768 Use 'save-mark-and-excursion' if you want the old behavior.
1771 ** 'read-buffer' and 'read-buffer-function' can now be called with a 4th
1772 argument ('predicate').
1775 ** 'completion-table-dynamic' by default stays in the minibuffer.
1776 The minibuffer will be the current buffer when the function is called.
1777 If you want the old behavior of calling the function in the buffer
1778 from which the minibuffer was entered, use the new argument
1779 'switch-buffer' to 'completion-table-dynamic'.
1782 ** window-configurations no longer record the buffers' marks.
1785 ** inhibit-modification-hooks now also inhibits lock-file checks, as well as
1786 active region handling.
1789 ** deactivate-mark is now buffer-local.
1792 ** 'cl-the' now asserts that its argument is of the given type.
1795 ** 'process-running-child-p' may now return a numeric process
1796 group ID instead of 't'.
1799 ** Mouse click events on mode line or header line no longer include
1800 any reference to a buffer position. The 6th member of the mouse
1801 position list returned for such events is now nil.
1804 ** Menu items in keymaps do not support the "key shortcut cache" any more.
1805 These slots used to hold key-shortcut data, but have been obsolete since
1809 ** Emacs no longer downcases the first letter of a system diagnostic
1810 when signaling a file error. For example, it now reports "Permission
1811 denied" instead of "permission denied". The old behavior was problematic
1812 in languages like German where downcasing rules depend on grammar.
1815 ** New variable 'text-quoting-style' to control how Emacs translates quotes.
1816 Set it to 'curve' for curved single quotes, to 'straight' for straight
1817 apostrophes, and to 'grave' for grave accent and apostrophe. The
1818 default value nil acts like 'curve' if curved single quotes are
1819 displayable, and like 'grave' otherwise. The new variable affects
1820 display of diagnostics and help, but not of info.
1823 ** substitute-command-keys now replaces quotes.
1824 That is, it converts documentation strings' quoting style as per the
1825 value of 'text-quoting-style'. Doc strings in source code can use
1826 either curved single quotes or grave accents and apostrophes. As
1827 before, characters preceded by \= are output as-is.
1830 ** Message-issuing functions 'error', 'message', etc. now convert quotes.
1831 They use the new 'format-message' function instead of plain 'format',
1832 so that they now follow user preference as per 'text-quoting-style'
1833 when processing curved single quotes, grave accents, and apostrophes
1834 in their format argument.
1837 ** The character classes [:alpha:] and [:alnum:] in regular expressions
1838 now match multibyte characters using Unicode character properties.
1839 If you want the old behavior where they matched any character with
1840 word syntax, use '\sw' instead.
1843 ** The character classes [:graph:] and [:print:] in regular expressions
1844 no longer match every multibyte character. Instead, Emacs now
1845 consults the Unicode character properties to determine which
1846 characters are graphic or printable. In particular, surrogates and
1847 unassigned codepoints are now rejected. If you want the old behavior,
1848 use [:multibyte:] instead.
1851 ** The 'diff' command uses the unified format now. To restore the old
1852 behavior, set 'diff-switches' to '-c'.
1855 ** 'grep-template' and 'grep-find-template' values don't include the
1856 --color argument anymore. It's added at the <C> place holder position
1857 dynamically. Any third-party code that changes these templates should
1858 be updated accordingly.
1860 ** The grep/rgrep/lgrep functions will now ask about saving files
1861 before running. This is controlled by the 'grep-save-buffers'
1865 ** '(/ N)' is now equivalent to '(/ 1 N)' rather than to '(/ N 1)'.
1866 The new behavior is compatible with Common Lisp and with XEmacs.
1867 This change does not affect Lisp code intended to be portable to
1868 Emacs 24.2 and earlier, which did not support unary '/'.
1871 ** The 'default-directory' value doesn't have to end slash. To make
1872 that happen, 'unhandled-file-name-directory' now defaults to calling
1873 'file-name-as-directory'.
1876 * Lisp Changes in Emacs 25.1
1880 *** New UPatterns 'quote', 'app'.
1882 *** New UPatterns can be defined with 'pcase-defmacro'.
1884 *** New vector QPattern.
1887 ** syntax-propertize is now automatically called on-demand during forward
1888 parsing functions like 'forward-sexp'.
1891 ** New hooks 'prefix-command-echo-keystrokes-functions' and
1892 'prefix-command-preserve-state-hook' allow the definition of prefix
1893 commands other than the predefined 'C-u'.
1896 ** New functions 'filepos-to-bufferpos' and 'bufferpos-to-filepos'.
1897 These allow conversion between buffer positions and the corresponding
1898 file byte offsets, given the file's encoding.
1901 ** The default value of 'load-read-function' is now 'read'.
1902 Previously, the default value of 'nil' implied using 'read'.
1905 ** New hook 'pre-redisplay-functions'.
1906 It is a bit easier to use than 'pre-redisplay-function'.
1909 ** The second arg of 'looking-back' should always be provided explicitly.
1910 Previously, it was an optional argument, now it's mandatory.
1913 ** Text properties 'intangible', 'point-entered', and 'point-left' are obsolete.
1914 Replaced by properties 'cursor-intangible' and 'cursor-sensor-functions',
1915 implemented by the new 'cursor-intangible-mode' and
1916 'cursor-sensor-mode' minor modes.
1919 ** 'inhibit-point-motion-hooks' now defaults to 't' and is obsolete.
1920 Use the new minor modes 'cursor-intangible-mode' and
1921 'cursor-sensor-mode' instead.
1924 ** New process type 'pipe', which can be used in combination with the
1925 ':stderr' keyword of make-process to handle standard error output
1929 ** New function 'make-process' provides an alternative interface to
1930 'start-process'. It allows programs to set process parameters such as
1931 process filter, sentinel, etc., through keyword arguments (similar to
1932 'make-network-process').
1935 ** A new function 'directory-files-recursively' returns all matching
1936 files (recursively) under a directory.
1939 ** New variable 'inhibit-message', when bound to non-nil, inhibits
1940 'message' and related functions from displaying messages in the echo
1941 area. The output is still logged to the *Messages* buffer.
1944 ** A new text property 'inhibit-read-only' can be used in read-only
1945 buffers to allow certain parts of the text to be writable.
1948 ** A new variable 'comment-end-can-be-escaped' is useful in languages
1949 such as C and C++ where line comments with escaped newlines are
1950 continued to the next line.
1953 ** New macro 'define-advice'.
1956 ** Emacs Lisp now supports generators.
1957 See the "Generators" section of the ELisp manual for the details.
1960 ** New finalizer facility for running code when objects become unreachable.
1961 See the "Finalizer Type" subsection in the ELisp manual for the
1965 ** lexical closures can use (:documentation FORM) to build their docstring.
1966 It should be placed right where the docstring would be, and FORM is then
1967 evaluated (and should return a string) when the closure is built.
1970 ** The new command 'fortune-message' has been added, which displays
1971 fortunes in the echo area.
1974 ** define-inline provides a new way to define inlinable functions.
1977 ** New function 'macroexpand-1' to perform a single step of macro expansion.
1980 ** Some "x-*" functions were obsoleted and/or renamed:
1981 *** x-select-text is renamed gui-select-text.
1982 *** x-selection-value is renamed gui-selection-value.
1983 *** x-get-selection is renamed gui-get-selection.
1984 *** x-get-clipboard and x-clipboard-yank are marked obsolete.
1985 *** x-get-selection-value is renamed to gui-get-primary-selection.
1986 *** x-set-selection is renamed to gui-set-selection
1989 ** New function 'string-greaterp', which return the opposite result of
1993 ** The new functions 'string-collate-lessp' and 'string-collate-equalp'
1994 preserve the collation order as defined by the system's locale(1)
1995 environment. For the time being this is implemented for modern POSIX
1996 systems and for MS-Windows, for other systems they fall back to their
1997 counterparts 'string-lessp' and 'string-equal'.
2000 ** The new function 'string-version-lessp' compares strings by
2001 interpreting consecutive runs of numerical characters as numbers, and
2002 compares their numerical values. According to this predicate,
2003 "foo2.png" is smaller than "foo12.png".
2006 *** The ls-lisp package uses 'string-collate-lessp' to sort file names.
2007 The effect is that, on systems that use ls-lisp for Dired, the default
2008 sort order of the files in Dired is now different from what it was in
2009 previous versions of Emacs. In particular, the file names are sorted
2010 disregarding punctuation, accents, and diacritics, and letter case is
2011 ignored. For example, files whose name begin with a period will no
2012 longer appear near the beginning of the directory listing. If you
2013 want the old, locale-independent sorting, customize the new option
2014 'ls-lisp-use-string-collate' to the nil value.
2017 *** The MS-Windows specific variable 'w32-collate-ignore-punctuation',
2018 if set to a non-nil value, causes the above 2 functions to ignore
2019 symbol and punctuation characters when collating strings. This
2020 emulates the behavior of modern Posix platforms when the locale's
2021 codeset is "UTF-8" (as in "en_US.UTF-8"). This is needed because
2022 MS-Windows doesn't support UTF-8 as codeset in its locales.
2025 ** New function 'alist-get', which is also a valid place (aka lvalue).
2028 ** New function 'funcall-interactively', which works like 'funcall'
2029 but makes 'called-interactively-p' treat the function as (you guessed it)
2030 called interactively.
2033 ** New function 'function-put' to use instead of 'put' for function properties.
2036 ** The new function 'bidi-find-overridden-directionality' allows you to
2037 find characters whose directionality was, perhaps maliciously,
2038 overridden by directional override control characters. Lisp programs
2039 can use this to detect potential phishing of URLs and other links that
2040 exploits bidirectional display reordering.
2043 ** The new function 'buffer-substring-with-bidi-context' allows you to
2044 copy a portion of a buffer into a different location while preserving
2045 the visual appearance both of the copied text and the text at
2046 destination, even when the copied text includes mixed bidirectional
2047 text and directional control characters.
2050 ** New properties that can be specified with 'declare':
2051 *** (interactive-only INSTEAD), says to use INSTEAD for non-interactive use.
2052 *** (pure VAL), if VAL is non-nil, indicates the function is pure.
2053 *** (side-effect-free VAL), if VAL is non-nil, indicates the function does not
2057 ** New macro 'with-file-modes', for evaluating expressions with default file
2058 permissions set to temporary values (e.g., for creating private files).
2061 ** You can access the slots of structures using 'cl-struct-slot-value'.
2064 ** Function 'sort' can deal with vectors.
2067 ** Function 'system-name' now returns an updated value if the current
2068 system's name has changed or if the Emacs process has changed systems,
2069 and to avoid long waits it no longer consults DNS to canonicalize the
2070 name. The variable 'system-name' is now obsolete.
2073 ** Function 'write-region' no longer outputs "Wrote FILE" in batch mode.
2076 ** If 'pwd' is called with a prefix argument, insert the current default
2080 ** New functions return extended information about fonts and faces.
2083 *** The function 'font-info' now returns more details about a font.
2084 In particular, it now returns the average width of the font's
2085 characters, which can be used for geometry-related calculations.
2088 *** A new function 'default-font-width' returns the average width of a
2089 character in the current buffer's default font. If the default face
2090 is remapped (see 'face-remapping-alist'), the value for the remapped
2091 face is returned. This function complements the existing function
2092 'default-font-height'.
2095 *** New functions 'window-font-height' and 'window-font-width' return
2096 the height and average width of characters in a specified face and
2097 window. If FACE is remapped (see 'face-remapping-alist'), the
2098 function returns the information for the remapped face.
2101 *** A new function 'window-max-chars-per-line' returns the maximal
2102 number of characters that can be displayed on one line. If a face
2103 and/or window are provided, these values are used for the
2104 calculation. This function is different from 'window-body-width' in
2105 that it accounts for (i) continuation glyphs, (ii) the size of the
2106 font, and (iii) the specified window.
2109 ** New utilities in subr-x.el:
2110 *** New macros 'if-let' and 'when-let' allow defining bindings and to
2111 execute code depending whether all values are true.
2112 *** New macros 'thread-first' and 'thread-last' allow threading a form
2113 as the first or last argument of subsequent forms.
2116 ** Documentation strings now support quoting with curved single quotes
2117 in addition to the old style with grave accent and apostrophe. The
2118 new style looks better on today's displays. In the new Electric Quote
2119 mode, you can enter curved single quotes into documentation by typing
2120 grave accent and apostrophe. Outside Electric Quote mode, you can
2121 enter them by typing 'C-x 8 [' and 'C-x 8 ]', or (if your Alt key
2122 works) by typing 'A-[' and 'A-]'. As described above under
2123 'text-quoting-style', the user can specify how to display doc string
2127 ** New function 'format-message' is like 'format' and also converts
2128 curved single quotes, grave accents and apostrophes as per
2129 'text-quoting-style'.
2132 ** show-help-function's arg is converted via substitute-command-keys
2133 before being passed to the function. Help strings, help-echo
2134 properties, etc. can therefore contain command key escapes and
2138 ** Time-related changes:
2140 *** Time conversion functions now accept an optional ZONE argument
2141 that specifies the time zone rules for conversion. ZONE is omitted or
2142 nil for Emacs local time, t for Universal Time, 'wall' for system wall
2143 clock time, or a string as in the TZ environment variable. The
2144 affected functions are 'current-time-string', 'current-time-zone',
2145 'decode-time', and 'format-time-string'. The function 'encode-time',
2146 which already accepted a simple time zone rule argument, has been
2147 extended to accept all the new forms.
2149 *** Incompatible change in the third argument of 'format-time-string'.
2150 Previously, any non-nil argument was interpreted as specifying Universal Time.
2151 This is no longer true; packages that want Universal Time should pass t
2152 as the third argument.
2154 *** Time-related functions now consistently accept numbers
2155 (representing seconds since the epoch) and nil (representing the
2156 current time) as well as the usual list-of-integer representation.
2157 Affected functions include 'current-time-string', 'current-time-zone',
2158 'decode-time', 'float-time', 'format-time-string', 'seconds-to-time',
2159 'time-add', 'time-less-p', 'time-subtract', 'time-to-day-in-year',
2160 'time-to-days', and 'time-to-seconds'.
2162 *** The 'encode-time-value' and 'with-decoded-time-value' macros have
2165 *** 'calendar-next-time-zone-transition', 'time-add', and
2166 'time-subtract' no longer return time values in the obsolete and
2167 undocumented integer-pair format. Instead, they return a list of two
2171 ** New function 'set-binary-mode' allows switching a standard stream
2172 of the Emacs process to binary I/O mode.
2175 ** The new function 'directory-name-p' can be used to check whether a file
2176 name (as returned from, for instance, 'file-name-all-completions') is
2177 a directory file name. It returns non-nil if the last character in
2178 the name is a directory separator character (forward slash on GNU and
2179 Unix systems, forward- or backslash on MS-Windows and MS-DOS).
2182 ** ASCII approximations to curved quotes are put in standard-display-table
2183 if the terminal cannot display curved quotes.
2186 ** Standard output and error streams now transliterate characters via
2187 standard-display-table, and encode output using locale-coding-system.
2188 To force a specific encoding, bind 'coding-system-for-write' to the
2189 coding-system of your choice when invoking functions like 'prin1' and
2193 ** New var 'truncate-string-ellipsis' to choose how to indicate truncation.
2196 ** New possible value for 'system-type': 'nacl'.
2197 This is used by Google's Native Client (NaCl).
2200 ** 'read-color' will now display the color names using the color itself
2201 as the background color.
2204 ** There is now a new variable 'flyspell-sort-corrections-function'
2205 that allows changing the way corrections are sorted.
2207 ** Miscellaneous name change
2210 For consistency with the usual Emacs spelling, the Lisp variable
2211 'hfy-optimisations' has been renamed to 'hfy-optimizations'.
2212 The old name should still work, as an obsolescent alias.
2214 ** Changes in Frame- and Window- Handling
2217 *** Emacs can now draw horizontal scroll bars on some platforms that
2218 provide toolkit scroll bars, namely Gtk+, Lucid, Motif and Windows.
2219 Horizontal scroll bars are turned off by default.
2221 **** New function 'horizontal-scroll-bars-available-p' telling whether
2222 horizontal scroll bars are available on the underlying system.
2224 **** New mode 'horizontal-scroll-bar-mode' to toggle horizontal scroll
2225 bars on all existing and future frames.
2227 **** New function 'toggle-horizontal-scroll-bar' to toggle horizontal
2228 scroll bars on the selected frame.
2230 **** New frame parameters 'horizontal-scroll-bars' and
2231 'scroll-bar-height' to set horizontal scroll bars and their height
2232 for individual frames and in 'default-frame-alist'.
2234 **** New functions 'frame-scroll-bar-height' and
2235 'window-scroll-bar-height' return the height of horizontal scroll
2236 bars on a specific frame or window.
2238 **** 'set-window-scroll-bars' now accepts five parameters where the last
2239 two specify height and type of the window's horizontal scroll bar.
2241 **** 'window-scroll-bars' now returns type and sizes of horizontal scroll
2244 **** New buffer-local variables 'horizontal-scroll-bar' and
2245 'scroll-bar-height'.
2248 *** New functions 'frame-geometry' and 'frame-edges' give access to a
2252 *** New functions 'mouse-absolute-pixel-position' and
2253 'set-mouse-absolute-pixel-position' get/set screen coordinates of the
2257 *** The function 'window-edges' now accepts three additional arguments to
2258 retrieve body, absolute and pixel edges of the window.
2261 *** The functions 'window-inside-edges', 'window-inside-pixel-edges' and
2262 'window-inside-absolute-pixel-edges' have been renamed to respectively
2263 'window-body-edges', 'window-body-pixel-edges' and
2264 'window-absolute-body-pixel-edges'. The old names are kept as aliases.
2267 *** New function 'window-absolute-pixel-position' to get the screen
2268 coordinates of a visible buffer position.
2271 *** The height of a frame's menu and tool bar are no longer counted in the
2272 frame's text height. This means that the text height stands only for
2273 the height of the frame's root window plus that of the echo area (if
2274 present). This was already the behavior for frames with external tool
2275 and menu bars (like in the Gtk builds) but has now been extended to all
2279 *** Frames now do not necessarily preserve the number of columns or lines
2280 they display when setting default font, menu bar, fringe width, or
2281 scroll bars. In particular, maximized and fullscreen frames are
2282 conceptually never resized if such settings change. For fullheight and
2283 fullwidth frames, the behavior may depend on the toolkit used.
2284 **** New option 'frame-inhibit-implied-resize' if non-nil, means that
2285 setting default font, menu bar, fringe width, or scroll bars of a
2286 specific frame does not resize that frame in order to preserve the
2287 number of columns or lines it displays.
2290 *** New function 'window-preserve-size' allows you to preserve the size of
2291 a window without "fixing" it. It's supported by 'fit-window-to-buffer',
2292 'temp-buffer-resize-mode' and 'display-buffer'.
2295 *** New 'display-buffer' action function 'display-buffer-use-some-frame'.
2296 This displays the buffer in an existing frame other than the current
2297 frame, and allows the caller to specify a frame predicate to exclude
2301 *** New minor mode 'window-divider-mode' and options
2302 'window-divider-default-places', 'window-divider-default-bottom-width'
2303 and 'window-divider-default-right-width'.
2306 *** The window displaying the '*Completions*' buffer with minibuffer
2307 completion candidates is now shown at the bottom of the selected
2308 frame. The size of that window is always as large as required to
2309 display all the candidates, except when limited by the minimum size
2310 of the other windows on that frame; those other windows are resized
2311 to provide space for the '*Completions*' display. The Emacs manual
2312 describes how to customize 'display-buffer-alist' to get back the old
2313 behavior, see the node "Temporary Displays" there.
2316 ** Tearoff menus and detachable toolbars for Gtk+ have been removed.
2317 Those features have been deprecated in Gtk+ for a long time.
2322 *** etags no longer qualifies class members by default.
2324 By default, 'etags' will not qualify class members for Perl and C-like
2325 object-oriented languages with their class names and namespaces, and
2326 will remove qualifications used explicitly in the code from the tag
2327 names it puts in TAGS files. This is so the etags.el back-end for
2328 'xref-find-definitions' is more accurate and produces less false
2331 Use --class-qualify (-Q) if you want the old default behavior of
2332 qualifying class members in C++, Java, Objective C, and Perl. Note
2333 that using -Q might make some class members become "unknown" to 'M-.'
2334 ('xref-find-definitions'); if so, you can use 'C-u M-.' to specify the
2335 qualified names by hand.
2338 *** New language Ruby
2340 Names of modules, classes, methods, functions, and constants are
2341 tagged. Overloaded operators are also tagged.
2345 Names of packages, functions, and types are tagged.
2348 *** Improved support for Lua
2350 Etags now tags functions even if the "function" keyword follows some
2351 whitespace at line beginning.
2354 * Changes in Emacs 25.1 on Non-Free Operating Systems
2357 ** MS-Windows specific Emacs build scripts are no longer in the distribution
2358 This includes the makefile.w32-in files in various subdirectories, and
2359 the support files. The file nt/configure.bat now just tells the user
2360 to use the procedure described in nt/INSTALL, by running the Posix
2361 'configure' script in the top-level directory.
2364 ** Building Emacs for MS-Windows requires at least Windows XP
2365 or Windows Server 2003. The built binaries still run on all versions
2366 of Windows starting with Windows 9X.
2369 ** Emacs running on MS-Windows now supports the daemon mode.
2372 ** The byte counts in etags-generated TAGS files are now the same on
2373 MS-Windows as they are on other platforms.
2376 ** On OS X, configure creates a Cocoa ("Nextstep") build by default.
2377 Pass '--without-ns' to configure to create an X11 build, the old default.
2380 ** OS X 10.5 or older is no longer supported.
2383 ** OS X on PowerPC is no longer supported.
2386 ** New variable 'ns-use-fullscreen-animation' controls animation for
2387 non-native NS fullscreen. The default is nil. Set to t to enable
2388 animation when entering and leaving fullscreen. For native OSX fullscreen
2392 ** The new function 'w32-application-type' returns the type of an
2393 MS-Windows application given the name of its executable program file.
2395 ** New variable 'w32-pipe-buffer-size'.
2396 It can be used to tune the size of the buffer of pipes created for
2397 communicating with subprocesses, when the program run by a subprocess
2398 exhibits unusual buffering behavior. Default is zero, which lets the
2399 OS use its default size.
2402 ----------------------------------------------------------------------
2403 This file is part of GNU Emacs.
2405 GNU Emacs is free software: you can redistribute it and/or modify
2406 it under the terms of the GNU General Public License as published by
2407 the Free Software Foundation, either version 3 of the License, or
2408 (at your option) any later version.
2410 GNU Emacs is distributed in the hope that it will be useful,
2411 but WITHOUT ANY WARRANTY; without even the implied warranty of
2412 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2413 GNU General Public License for more details.
2415 You should have received a copy of the GNU General Public License
2416 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2422 paragraph-separate: "[
\f]*$"