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 ** New configure option '--disable-build-details' attempts to build an
36 Emacs that is more likely to be reproducible; that is, if you build
37 and install Emacs twice, the second Emacs is a copy of the first.
38 Deterministic builds omit the build date from the output of the
39 emacs-version and erc-cmd-SV functions, and the leave the following
40 variables nil: emacs-build-system, emacs-build-time,
43 ** Emacs no longer works on IRIX. We expect that Emacs users are not
44 affected by this, as SGI stopped supporting IRIX in December 2013.
47 * Startup Changes in Emacs 25.2
50 * Changes in Emacs 25.2
53 ** A number of accessors for the value returned by 'file-attributes'
54 has been added. They are: 'file-attribute-type',
55 'file-attribute-link-number', 'file-attribute-user-id',
56 'file-attribute-group-id', 'file-attribute-access-time',
57 'file-attribute-modification-time',
58 'file-attribute-status-change-time', 'file-attribute-size',
59 'file-attribute-modes', 'file-attribute-inode-number', and
60 'file-attribute-device-number'
63 ** The new function 'buffer-hash' has been added, and can be used to
64 compute a fash, non-consing hash of the contents of a buffer.
67 ** 'fill-paragraph' no longer marks the buffer as changed unless it
68 actually changed something.
71 ** The locale language name 'ca' is now mapped to the language
72 environment 'Catalan', which has been added.
75 ** 'align-regexp' has a separate history for its interactive argument
76 'align-regexp' no longer shares its history with all other
77 history-less functions that use 'read-string'
80 ** The networking code has been reworked so that it's more
81 asynchronous than it was (when specifying :nowait t in
82 'make-network-process'). How asynchronous it is varies based on the
83 capabilities of the system, but on a typical GNU/Linux system the DNS
84 resolution, the connection, and (for TLS streams) the TLS negotiation
85 are all done without blocking the main Emacs thread. To get
86 asynchronous TLS, the TLS boot parameters have to be passed in (see
87 the manual for details).
89 Certain process oriented functions (like 'process-datagram-address')
90 will block until socket setup has been performed. The recommended way
91 to deal with asynchronous sockets is to avoid interacting with them
92 until they have changed status to "run". This is most easily done
93 from a process sentinel.
95 ** 'make-network-process' and 'open-network-stream' sometimes allowed
96 :service to be an integer string (e.g., :service "993") and sometimes
97 required an integer (e.g., :service 993). This difference has been
98 eliminated, and integer strings work everywhere.
100 ** It is possible to disable attempted recovery on fatal signals
102 Two new variables allow to disable attempts to recover from stack
103 overflow and to avoid automatic auto-save when Emacs is delivered a
104 fatal signal. 'attempt-stack-overflow-recovery', if set to 'nil',
105 will disable attempts to recover from C stack overflows; Emacs will
106 then crash as with any other fatal signal.
107 'attempt-orderly-shutdown-on-fatal-signal', if set to 'nil', will
108 disable attempts to auto-save the session and shut down in an orderly
109 fashion when Emacs receives a fatal signal; instead, Emacs will
110 terminate immediately. Both variables are non-'nil' by default.
111 These variables are for users who would like to avoid the small
112 probability of data corruption due to techniques Emacs uses to recover
116 * Editing Changes in Emacs 25.2
119 * Changes in Specialized Modes and Packages in Emacs 25.2
124 *** A new 's' command for switching to another eww buffer via the minibuffer.
127 *** The 'o' command ('shr-save-contents') has moved to 'O' to avoid collision
128 with the 'o' command from 'image-map'.
131 ** The commands that add ChangeLog entries now prefer a VCS root directory
132 for the ChangeLog file, if none already exists. Customize
133 'change-log-directory-files' to nil for the old behavior.
136 ** Support for non-string values of 'time-stamp-format' has been removed.
141 *** New connection method "sg", which allows to edit files under
145 *** New connection method "doas" for OpenBSD hosts.
148 ** 'auto-revert-use-notify' is set back to t in 'global-auto-revert-mode'.
153 *** Support for completing attribute values and bang-rules using the
154 'completion-at-point' command.
157 * New Modes and Packages in Emacs 25.2
160 * Incompatible Lisp Changes in Emacs 25.2
163 ** Resizing a frame no longer runs 'window-configuration-change-hook'.
164 Put your function on 'window-size-change-functions' instead.
167 * Lisp Changes in Emacs 25.2
169 ** New var syntax-ppss-table to control the syntax-table used in syntax-ppss
171 ** Autoload files can be generated without timestamps,
172 by setting 'autoload-timestamps' to nil.
173 FIXME As an experiment, nil is the current default.
174 If no insurmountable problems before next release, it can stay that way.
176 ** 'ert-with-function-mocked' of 'ert-x package allows mocking of functions
180 ** 'gnutls-boot' now takes a parameter :complete-negotiation that says
181 that negotiation should complete even on non-blocking sockets.
184 ** New functions 'window-pixel-width-before-size-change' and
185 'window-pixel-height-before-size-change' allow to detect which window
186 changed size when 'window-size-change-functions' are run.
189 ** New function 'display-buffer-reuse-mode-window' is an action function
190 suitable for use in 'display-buffer-alist'. For example, to avoid creating
191 a new window when opening man pages when there's already one, use
192 (add-to-list 'display-buffer-alist
193 '("\\`\\*Man .*\\*\\'" .
194 (display-buffer-reuse-mode-window
195 (inhibit-same-window . nil)
199 ** New function 'func-arity' returns information about the argument list
200 of an arbitrary function.
201 This is a generalization of 'subr-arity' for functions that are not
202 built-in primitives. We recommend using this new function instead of
206 ** 'parse-partial-sexp' state has a new element. Element 10 is
207 non-nil when the last character scanned might be the first character
208 of a two character construct, i.e. a comment delimiter or escaped
209 character. Its value is the syntax of that last character.
212 ** 'parse-partial-sexp''s state, element 9, has now been confirmed as
213 permanent and documented, and may be used by Lisp programs. Its value
214 is a list of currently open parenthesis positions, starting with the
215 outermost parenthesis.
217 ** The function 'redirect-debugging-output' now works on platforms
218 other than GNU/Linux.
221 ** New functions 'sxhash-eq' and 'sxhash-eql' return hash codes of a
222 Lisp object suitable for use with 'eq' and 'eql' correspondingly. If
223 two objects are 'eq' ('eql'), then the result of 'sxhash-eq'
224 ('sxhash-eql') on them will be the same.
227 ** Function 'sxhash' has been renamed to 'sxhash-equal' for
228 consistency with the new functions. For compatibility, 'sxhash'
229 remains as an alias to 'sxhash-equal'.
232 ** Time conversion functions that accept a time zone rule argument now
233 allow it to be OFFSET or a list (OFFSET ABBR), where the integer
234 OFFSET is a count of seconds east of Universal Time, and the string
235 ABBR is a time zone abbreviation. The affected functions are
236 'current-time-string', 'current-time-zone', 'decode-time',
237 'format-time-string', and 'set-time-zone-rule'.
240 * Changes in Emacs 25.2 on Non-Free Operating Systems
242 ** Intercepting hotkeys on Windows 7 and later now works better.
243 The new keyboard hooking code properly grabs system hotkeys such as
244 Win-* and Alt-TAB, in a way that Emacs can get at them before the
245 system. This makes the 'w32-register-hot-key' functionality work
246 again on all versions of MS-Windows starting with Windows 7. On
247 Windows NT and later you can now register any hotkey combination. (On
248 Windows 9X, the previous limitations, spelled out in the Emacs manual,
252 * Installation Changes in Emacs 25.1
255 ** Building Emacs now requires C99 or later.
258 ** Building Emacs now requires GNU make, version 3.81 or later.
261 ** New configure option --with-cairo.
262 This builds Emacs with Cairo drawing. As a side effect, it provides
263 support for built-in printing, when Emacs was built with GTK+.
264 Cairo drawing is an experimental feature in Emacs, and subject to
265 change in future releases.
268 ** New configure option --with-modules.
269 This enables support for loading dynamic modules; see below.
272 ** By default, Emacs no longer works on IRIX. We expect that Emacs
273 users are not affected by this, as SGI stopped supporting IRIX in
274 December 2013. If you are affected, please send a bug report. You
275 should be able to work around the problem either by porting the Emacs
276 undumping code to GCC under IRIX, or by configuring --with-wide-int,
277 or by sticking with Emacs 24.4.
280 ** The Emacs garbage collector assumes GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS.
281 The GC_MAKE_GCPROS_NOOPS stack-marking variant has been the default
282 since Emacs 24.4, and the other variants were undocumented and were
283 obstacles to maintenance and development. GC_MARK_STACK and its
284 related symbols have been removed from the C internals.
287 ** 'configure' now prefers gnustep-config when configuring GNUstep.
288 If gnustep-config is not available, the old heuristics are used.
291 ** 'configure' now prefers inotify to gfile for file notification,
292 unless gfile is explicitly requested via --with-file-notification='gfile'.
295 ** 'configure' detects the kqueue file notification library on *BSD
296 and Mac OS X machines.
299 ** The configure option '--with-pkg-config-prog' has been removed.
300 Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to.
303 ** The configure option '--with-mmdf' has been removed.
304 It was no longer useful, as it relied on libraries that are no longer
305 supported, and its presence led to confusion during configuration.
306 This affects only the 'movemail' utility; Emacs itself can still
307 process MMDF-format files as before.
310 ** The configure option '--enable-silent-rules' is now the default,
311 and silent rules are now quieter. To get the old behavior where
312 'make' chatters a lot, configure with '--disable-silent-rules' or
313 build with 'make V=1'.
316 ** The configure option '--with-gameuser' now allows you to specify a
317 group instead of a user if its argument is prefixed by ':' (a colon).
318 This will cause the game score files in ${localstatedir}/games/emacs
319 to be owned by that group, and the helper program for updating them to
320 be installed setgid. The option now defaults to the 'games' group.
323 ** The 'grep-changelog' script (and its manual page) are no longer included.
324 It has no particular connection to Emacs and has not changed in years,
325 so if you want to use it, you can always take a copy from an older Emacs.
328 ** Emacs 25 comes with a new set of icons.
329 Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png.
330 The old Emacs logo icons are available as 'emacs23.png' in the same location.
333 ** New make target 'check-expensive' to run additional tests.
334 This includes all tests which run via "make check", plus additional
335 tests which take more time to perform.
338 * Startup Changes in Emacs 25.1
341 ** When Emacs is given a file as a command line argument and
342 'initial-buffer-choice' is non-nil, display both the file and
343 'initial-buffer-choice'. When Emacs is given more than one file and
344 'initial-buffer-choice' is non-nil, show 'initial-buffer-choice'
345 and *Buffer List*. This makes Emacs convenient to use from the
346 command line when 'initial-buffer-choice' is non-nil.
349 ** The value of 'initial-scratch-message' is now treated as a doc string
350 and can contain escape sequences for command keys, quotes, and the like.
353 ** The default height of GUI frames was enlarged.
354 This is so there's enough space in the initial window to display the
355 optional text about recovering crashes sessions, without losing the
356 splash image display.
359 * Changes in Emacs 25.1
362 ** Xwidgets: a new feature for embedding native widgets inside Emacs buffers.
363 If you have gtk3 and webkitgtk3 installed, and Emacs was built with
364 xwidget support, you can access the embedded webkit browser with 'M-x
365 xwidget-webkit-browse-url'. This opens a new buffer with the embedded
366 browser. The buffer will have a new mode, 'xwidget-webkit-mode'
367 (similar to 'image-mode'), which supports the webkit widget.
370 *** New functions for xwidget-webkit mode 'xwidget-webkit-insert-string',
371 'xwidget-webkit-adjust-size-dispatch', 'xwidget-webkit-back',
372 'xwidget-webkit-browse-url', 'xwidget-webkit-reload',
373 'xwidget-webkit-current-url', 'xwidget-webkit-scroll-backward',
374 'xwidget-webkit-scroll-forward', 'xwidget-webkit-scroll-down',
375 'xwidget-webkit-scroll-up'.
378 ** Emacs can now load shared/dynamic libraries (modules).
379 A dynamic Emacs module is a shared library that provides additional
380 functionality for use in Emacs Lisp programs, just like a package
381 written in Emacs Lisp would. The functions 'load', 'require',
382 'load-file', etc. were extended to load such modules, as they do with
383 Emacs Lisp packages. The new variable 'module-file-suffix' holds the
384 system-dependent value of the file-name extension ('.so' on Posix
385 hosts) of the module files.
387 A module should export a C-callable function named
388 'emacs_module_init', which Emacs will call as part of the call to
389 'load' or 'require' which loads the module. It should also export a
390 symbol named 'plugin_is_GPL_compatible' to indicate that its code is
391 released under the GPL or compatible license; Emacs will refuse to
392 load modules that don't export such a symbol.
394 If a module needs to call Emacs functions, it should do so through the
395 API defined and documented in the header file 'emacs-module.h'. Note
396 that any module that provides Lisp-callable functions will have to use
397 Emacs functions such as 'fset' and 'funcall', in order to register its
398 functions with the Emacs Lisp interpreter.
400 Modules can create 'user-ptr' Lisp objects that embed pointers to C
401 structs defined by the module. This is useful for keeping around
402 complex data structures created by a module, to be passed back to the
403 module's functions. User-ptr objects can also have associated
404 "finalizers" -- functions to be run when the object is GC'ed; this is
405 useful for freeing any resources allocated for the underlying data
406 structure, such as memory, open file descriptors, etc. A new
407 predicate 'user-ptrp' returns non-nil if its argument is a 'user-ptr'
410 Loadable modules in Emacs are an experimental feature, and subject to
411 change in future releases. For that reason, their support is disabled
412 by default, and must be enabled by using the '--with-modules' option
416 ** A second dir-local file (.dir-locals-2.el) is now accepted.
417 See the variable 'dir-locals-file-2' for more information.
420 ** Network security (TLS/SSL certificate validity and the like) is
421 added via the new Network Security Manager (NSM) and controlled via
422 the 'network-security-level' variable.
425 ** International domain names (IDNA) are now encoded via the new
426 puny.el library, so that one can visit web sites with non-ASCII URLs.
429 ** C-h l now also lists the commands that were run.
431 ** The new M-s M-w key binding uses eww to search the web for the
435 ** The new 'timer-list' command lists all active timers in a buffer
436 where you can cancel them with the 'c' command.
438 ** M-x suggests shorthands and ignores obsolete commands for completion.
439 ** x-select-enable-clipboard is renamed select-enable-clipboard.
440 x-select-enable-primary and renamed select-enable-primary.
441 Additionally they both now apply to all systems (OSX, GNUstep, Windows, you
442 name it), with the proviso that on some systems (e.g. Windows)
443 select-enable-primary is ineffective since the system doesn't
444 have the equivalent of a primary selection.
447 ** New option 'switch-to-buffer-in-dedicated-window' allows you to
448 customize how 'switch-to-buffer' proceeds interactively when the
449 selected window is strongly dedicated to its buffer.
452 ** The option 'even-window-heights' has been renamed to
453 'even-window-sizes' and now handles window widths as well.
456 ** New function 'read-multiple-choice' use to prompt for
457 multiple-choice questions, with a handy way to display help texts.
460 ** terpri gets an optional arg ENSURE to conditionally output a newline.
463 ** 'insert-register' now leaves point after the inserted text
464 when called interactively. A prefix argument toggles this behavior.
467 ** The new variable 'term-file-aliases' replaces some files from lisp/term.
468 The function 'tty-run-terminal-initialization' consults this variable
469 when deciding what terminal-specific initialization code to run.
472 ** New variable 'system-configuration-features', listing some of the
473 main features that Emacs was compiled with. This is mainly intended
474 for use in Emacs bug reports.
477 ** A password is now hidden also when typed in batch mode. Another
478 hiding character but the default '.' can be used by let-binding the
479 variable 'read-hide-char'.
482 ** The Emacs pseudo-random number generator can be securely seeded.
483 On system where Emacs can access the system entropy or some other
484 cryptographically secure random stream, it now uses that when 'random'
485 is called with its argument 't'. This allows cryptographically strong
486 random values; in particular, the Emacs server now uses this facility
487 to produce its authentication key.
490 ** New input methods: 'tamil-dvorak' and 'programmer-dvorak'.
493 * Editing Changes in Emacs 25.1
496 ** M-x suggests shorthands and ignores obsolete commands for completion.
501 *** Successive single-char deletions are collapsed in the undo-log just like
502 successive char insertions. Which commands invoke this behavior is
503 controlled by the new 'undo-auto-amalgamate' function. See the node
504 "Undo" in the ELisp manual for more details.
507 *** The heuristic used to insert 'undo-boundary' after each command
508 has changed, so that if a command causes changes in more than just the
509 current buffer, Emacs now calls 'undo-boundary' in every buffer
510 affected by the command.
513 ** New command 'comment-line' bound to 'C-x C-;'.
515 ** New and improved facilities for inserting Unicode characters
518 *** Unicode names entered via C-x 8 RET now use substring completion by default.
521 *** C-x 8 now has shorthands for several chars, such as U+2010
522 (HYPHEN), U+2011 (NON-BREAKING HYPHEN), and U+2012 (FIGURE DASH). As
523 before, you can type C-x 8 C-h to list shorthands.
526 *** New minor mode electric-quote-mode for using curved quotes as you
527 type. See also the new variable 'text-quoting-style'.
530 ** New minor mode global-eldoc-mode is enabled by default.
533 ** Emacs now uses "bracketed paste mode" on text terminals that support it.
534 Bracketed paste mode causes text terminals to wrap pasted text in special
535 escape sequences that allow Emacs to tell the difference between text
536 you type and text you paste from other applications. Emacs then
537 avoids interpreting each character in the pasted text as it does with
538 keyboard input, which results in a paste experience similar to that
539 under a window system, and significant performance improvements when
540 pasting large amounts of text.
542 Bracketed paste mode is disabled by default, so Emacs automatically
543 enables it at startup if the terminal supports it.
546 ** Emacs now supports the latest version of the UBA.
547 The Emacs implementation of the Unicode Bidirectional Algorithm (UBA)
548 was updated to support all the latest additions and changes introduced
549 in Unicode Standard versions 6.3, 7.0, and the latest Unicode 8.0.
550 This includes full support for directional isolates and the
551 Bidirectional Parentheses Algorithm (BPA) specified by these Unicode
555 ** You can access 'mouse-buffer-menu' (C-down-mouse-1) using C-f10.
558 ** New buffer-local 'electric-pair-local-mode'.
561 ** New variable 'fast-but-imprecise-scrolling' inhibits
562 fontification during full screen scrolling operations, giving less
563 hesitant operation during auto-repeat of C-v, M-v at the cost of
564 possible inaccuracies in the end position.
567 ** New documentation command 'describe-symbol'.
568 Works for functions, variables, faces, etc. It is bound to 'C-h o' by
572 ** New function 'custom-prompt-customize-unsaved-options' checks for
573 unsaved customizations and prompts user to customize (if found). It
574 is intended for adding to 'kill-emacs-query-functions'.
577 ** The old 'C-x w' bindings in hi-lock-mode are officially deprecated
578 in favor of the global 'M-s h' bindings introduced in Emacs-23.1.
579 They'll disappear soon.
582 ** New bindings for 'query-replace-map'.
583 'undo', undo the last replacement; bound to 'u'.
584 'undo-all', undo all replacements; bound to 'U'.
587 * Changes in Specialized Modes and Packages in Emacs 25.1
592 *** New command 'checkdoc-package-keywords' checks if the
593 current package keywords are recognized. Set the new option
594 'checkdoc-package-keywords-flag' to non-nil to make
595 'checkdoc-current-buffer' call this function automatically.
598 *** New function 'checkdoc-file' checks for style errors.
599 It's meant for use together with 'compile':
600 emacs -batch --eval "(checkdoc-file \"subr.el\")"
605 *** The desktop format version has been upgraded from 206 to 208.
606 Although Emacs 25.1 can read a version 206 desktop, earlier Emacsen
607 cannot read a version 208 desktop. To upgrade your desktop file, you
608 must explicitly request the upgrade, by C-u M-x desktop-save. You are
609 recommended to do this as soon as you have firmly upgraded to Emacs
610 25.1 (or later). Should you ever need to downgrade your desktop file
611 to version 206, you can do this with C-u C-u M-x desktop-save.
614 ** New function 'bookmark-set-no-overwrite' bound to C-x r M.
615 It raises an error if a bookmark of that name already exists,
616 unlike 'bookmark-set' which silently updates an existing bookmark.
621 *** New user options 'mm-html-inhibit-images' and 'mm-html-blocked-images'
622 now control how mm-* functions fetch and display images in an HTML
623 message. Gnus still uses 'gnus-inhibit-images' and 'gnus-blocked-images'
624 for that purpose, i.e., binds mm-html- variables with those gnus-
625 variables, but other packages do not have to bind gnus- variables now.
628 *** 'mm-inline-text-html-with-images' has been removed.
629 Use 'mm-html-inhibit-images' instead. Note that the value is opposite
635 *** 'imap-ssl-program' has been removed, and imap.el uses the internal
636 GnuTLS encryption functions if possible.
641 *** 'json-pretty-print' and 'json-pretty-print-buffer' now maintain
642 the ordering of object keys by default.
645 *** New commands 'json-pretty-print-ordered' and
646 'json-pretty-print-buffer-ordered' pretty prints JSON objects with
647 object keys sorted alphabetically.
650 ** Prog mode has some support for multi-mode indentation.
651 This allows better indentation support in modes that support multiple
652 programming languages in the same buffer, like literate programming
653 environments or ANTLR programs with embedded Python code.
655 A major mode can provide indentation context for a sub-mode through
656 the 'prog-indentation-context' variable. To support this, modes that
657 provide indentation should use 'prog-widen' instead of 'widen' and
658 'prog-first-column' instead of a literal zero. See the node
659 "Mode-Specific Indent" in the ELisp manual for more details.
661 ** Prettify Symbols mode
664 *** Prettify Symbols mode supports custom composition predicates. By
665 overriding the default 'prettify-symbols-compose-predicate', modes can
666 specify in which contexts a symbol may be displayed as some Unicode
667 character. 'prettify-symbols-default-compose-p' is the default which
668 is suitable for most programming languages such as C or Lisp (but not
672 *** Symbols can be unprettified while point is inside them.
673 New variable 'prettify-symbols-unprettify-at-point' configures this.
675 ** Enhanced xterm support
678 *** The new variable 'xterm-screen-extra-capabilities' for configuring xterm.
679 This variable tells Emacs which advanced capabilities are available in
680 the xterm terminal emulator used to display Emacs text-mode frames.
681 The default is to check each capability, and use it if available.
682 (This variable was introduced in Emacs 24.1, but was not announced in
686 *** Killing text now also sets the CLIPBOARD/PRIMARY selection
687 in the surrounding GUI (using the OSC-52 escape sequence). This only works
688 if your xterm supports it and enables the 'allowWindowOps' options (disabled
689 by default at least in Debian, for security reasons).
691 Similarly, you can yank the CLIPBOARD/PRIMARY selection (using the OSC-52
692 escape sequence) if your xterm has the feature enabled but for that you
693 additionally need to add 'getSelection' to 'xterm-extra-capabilities'.
696 *** 'xterm-mouse-mode' now supports mouse-tracking (if your xterm supports it).
699 ** The way to turn on and off 'save-place' mode has changed.
700 It is no longer sufficient to load the saveplace library and set
701 'save-place' non-nil. Instead, use the two new minor modes:
702 'save-place-mode' turns on saving last place in every file, and
703 'save-place-local-mode' does that only for the file in whose buffer it
704 is invoked. The 'save-place' variable is now an obsolete alias for
705 'save-place-mode', which replaces it, and 'toggle-save-place' is an
706 obsolete alias for the new 'save-place-local-mode' command.
711 *** ERC can now hide message types by network or channel.
712 'erc-hide-list' will hide all messages of the specified type, while
713 'erc-network-hide-list' and 'erc-channel-hide-list' will only hide the
714 specified message types for the respective specified targets.
716 *** New variable 'erc-default-port-tls' used to connect to TLS IRC
720 *** Reconnection is now asynchronous.
723 *** Nick completion is now case-insensitive again after inadvertently
724 being made case-sensitive in Emacs 24.2.
729 *** New commands, key binds, and menu items.
731 **** '<' and '>' for navigating previous and next tracks in playlist
733 **** New play/pause command 'mpc-toggle-play' bound to 's'
735 **** 'g' bound to new command 'mpc-seek-current' will navigate current
738 **** New commands 'mpc-toggle-{consume,repeat,single,shuffle}' for
739 toggling playback modes.
742 *** Now supports connecting to a UNIX domain socket.
745 *** Looks at more image file names to use as album art.
746 Case-insensitively tries for .folder.png (freedesktop) and folder.jpg
747 (XP) in addition to cover.jpg.
750 *** Searches in more locations for MPD configuration files.
751 MPD supports the XDG base directory specification since version 0.17.6.
756 *** 'midnight-mode' is now a proper minor mode.
759 *** clean-buffer-*-regexps can now specify buffers via predicate functions.
764 *** New "external" package status.
765 An external package is any installed package that's not built-in and
766 not from 'package-user-dir', which usually means it's from an entry in
767 'package-directory-list'. They are treated much like built-in
768 packages, in that they cannot be deleted through the package menu and
769 are not considered for upgrades.
771 The effect is that a user can manually place a specific version of a
772 package inside 'package-directory-list' and the package menu will
776 *** If a package is available on multiple archives and one has higher
777 priority (as per 'package-archive-priorities') only that one is
778 listed. This can be configured with 'package-menu-hide-low-priority'.
781 *** 'package-menu-toggle-hiding' now toggles the hiding of packages.
782 This includes the above-mentioned low-priority packages, as well as
783 available packages whose version is lower than the currently installed
784 version (which were previously impossible to display).
785 This allows users to downgrade a package if a lower version is
789 *** When filtering the package menu, keywords starting with "arc:" or
790 "status:" represent package archive or status, respectively, instead
794 *** Most functions which involve downloading information now take an
795 ASYNC argument. If it is non-nil, package.el performs the download(s)
799 *** New variable 'package-menu-async' controls whether the
800 package-menu uses asynchronous downloads.
803 *** 'package-install-from-buffer' and 'package-install-file' work on directories.
804 This follows the same rules as installing from a .tar file, except the
805 -pkg file is optional.
808 *** Packages which are dependencies of other packages cannot be deleted.
809 The FORCE argument to 'package-delete' overrides this.
812 *** New custom variable 'package-selected-packages' tracks packages
813 which were installed by the user (as opposed to installed as
814 dependencies). This variable can also be manually customized.
817 *** New command 'package-install-selected-packages' installs all
818 packages from 'package-selected-packages' which are currently missing.
821 *** 'package-install' function now takes a DONT-SELECT argument. If
822 this function is called interactively or if DONT-SELECT is nil, add the
823 package being installed to 'package-selected-packages'.
826 *** New command 'package-autoremove' removes all packages which were
827 installed strictly as dependencies but are no longer needed.
832 When you invoke 'shell' interactively, the *shell* buffer will now
833 display in a new window. However, you can customize this behavior via
834 the 'display-buffer-alist' variable. For example, to get
835 the old behavior -- *shell* buffer displays in current window -- use
836 (add-to-list 'display-buffer-alist
837 '("^\\*shell\\*$" . (display-buffer-same-window))).
841 *** The ':protection' slot option is not obeyed any more.
843 *** The 'newname' argument to constructors is optional&deprecated.
844 If you need your objects to be named, do it by inheriting from 'eieio-named'.
846 *** The <class>-list-p and <class>-child-p functions are declared obsolete.
848 *** The <class> variables are declared obsolete.
850 *** The <initarg> variables are declared obsolete.
852 *** defgeneric and defmethod are declared obsolete.
853 Use the equivalent facilities from cl-generic.el instead.
855 *** 'constructor' is now an obsolete alias for 'make-instance'.
856 --- 'pcase' accepts a new UPattern 'eieio'.
861 *** New command 'ido-bury-buffer-at-head' bound to C-S-b
862 Bury the buffer at the head of 'ido-matches', analogous to how C-k
863 kills the buffer at head.
866 *** A prefix argument to 'ido-restrict-to-matches' will reverse its
867 meaning, and the list is restricted to those elements that do not
868 match the current input.
873 *** You can use <UP> and <DOWN> arrow keys to move through history by lines.
874 The new commands 'next-line-or-history-element' and
875 'previous-line-or-history-element', bound to <UP> and <DOWN> in the
876 minibuffer, allow by-line movement through minibuffer history,
877 similarly to an ordinary buffer. Only when point moves over
878 the bottom/top of the minibuffer it goes to the next/previous history
879 element. 'M-p' and 'M-n' still move directly to previous/next history
882 ** Search and Replace
885 *** 'isearch' and 'query-replace' can now perform character folding in matches.
886 This is analogous to case folding, but instead of disregarding case
887 variants, it disregards wider classes of distinctions between similar
888 characters. (Case folding is a special case of character folding.)
889 This means many characters in the search string will match entire
890 groups of characters instead of just themselves.
892 For instance, the ASCII double quote character " will match all
893 variants of double quotes, and the letter 'a' will match all of its
894 accented cousins, even those composed of multiple characters, as well
895 as many other symbols like U+249C (PARENTHESIZED LATIN SMALL LETTER
898 Character folding is enabled by customizing 'search-default-mode' to
899 the value 'character-fold-to-regexp'. You can also toggle character
900 folding in the middle of a search by typing 'M-s ''.
902 'query-replace' honors character folding if the new variable
903 'replace-character-fold' is customized to a non-nil value.
906 *** New user option 'search-default-mode'.
907 This option specifies the default mode for Isearch. The default
908 value, nil specifies that Isearch does literal searches (however,
909 'case-fold-search' and 'isearch-lax-whitespace' may still be applied,
910 as in previous Emacs versions).
913 *** New function 'character-fold-to-regexp' can be used
914 by searching commands to produce a regexp matching anything that
915 character-folds into STRING.
918 *** The new M-s M-w key binding uses eww to search the web for the
919 text in the region. The search engine to use for this is specified by
920 the customizable variable 'eww-search-prefix'.
923 *** Query-replace history is enhanced.
924 When query-replace reads the FROM string from the minibuffer, typing
925 'M-p' will now show previous replacements as "FROM SEP TO", where FROM
926 and TO are the original text and its replacement, and SEP is an arrow
927 string defined by the new variable 'query-replace-from-to-separator'.
928 To select a prior replacement, type 'M-p' until the desired
929 replacement appears in the minibuffer, and then exit the minibuffer by
934 *** If 'quick-calc' is called with a prefix argument, insert the
935 result of the calculation into the current buffer.
938 ** In Edebug, you can now set the initial mode with C-x C-a C-m. With
939 this you can tell Edebug not to stop at the start of the first
940 instrumented function.
945 *** New minor mode 'global-eldoc-mode'
946 It is turned on by default, and affects '*scratch*' and other buffers
947 whose major mode supports Emacs Lisp.
950 *** 'eldoc-documentation-function' now defaults to 'ignore'
953 *** 'describe-char-eldoc' displays information about character at point,
954 and can be used as a default value of 'eldoc-documentation-function'. It is
955 useful when, for example, one needs to distinguish various spaces - e.g.,
956 U+00A0 (NO-BREAK SPACE), U+2002 (EN SPACE), and U+2009 (THIN SPACE) - while
957 using mono-spaced font.
962 *** HTML can now be rendered using variable-width fonts.
965 *** A new command 'F' ('eww-toggle-fonts') can be used to toggle
966 whether to use variable-pitch fonts or not. The user can also
967 customize the 'shr-use-fonts' variable.
970 *** A new command 'C' ('eww-toggle-colors') can be used to toggle
971 whether to use the HTML-specified colors or not. The user can also
972 customize the 'shr-use-colors' variable.
975 *** A new command 'R' ('eww-readable') will try do identify the main
976 textual parts of a web page and display only that, leaving menus and
977 the like off the page.
980 *** A new command 'D' ('eww-toggle-paragraph-direction') allows you to
981 toggle the paragraph direction between left-to-right and right-to-left.
984 *** Images that are being loaded are now marked with grey
985 "placeholder" images of the size specified by the HTML. They are then
986 replaced by the real images asynchronously, which will also now
987 respect width/height HTML specs (unless they specify widths/heights
988 bigger than the current window).
991 *** You can now use several eww buffers in parallel by renaming eww
992 buffers you want to keep separate.
995 *** Partial state of the eww buffers (the URIs and the titles of the
996 pages visited) is now preserved in the desktop file.
999 *** 'eww-after-render-hook' is now called after eww has rendered
1000 the data in the buffer.
1003 *** The 'eww-reload' command now takes a prefix to not reload via
1004 the net, but just use the local copy of the HTML.
1007 *** The DOM shr and eww uses has been changed to the general Emacs
1008 xml.el/libxml2 DOM, and a new package dom.el has been added to
1009 interact with this DOM. See the Emacs Lisp manual for interface
1013 *** 'mailcap-mime-data' is now consulted when displaying PDF files.
1016 *** The new 'S' command will list all eww buffers, and allow managing
1020 *** https pages with valid certificates have headers marked in green, while
1021 invalid certificates are marked in red.
1026 *** text/html messages that contain inline image parts will be
1027 transformed into multipart/related messages before sending.
1030 *** The 'message-valid-fqdn-regexp' variable has been removed, since
1031 there are now top-level domains added all the time. Message will no
1032 longer warn about sending emails to top-level domains it hasn't heard
1035 *** 'message-beginning-of-line' (bound to C-a) understands folded headers.
1036 In 'visual-line-mode' it will look for the true beginning of a header
1037 while in non-'visual-line-mode' it will move the point to the indented
1041 ** In Show Paren Mode, a parenthesis can be highlighted when point
1042 stands inside it, and certain parens can be highlighted when point is
1043 at BOL or EOL, or in whitespace there. To enable these, customize,
1044 respectively, 'show-paren-when-point-inside-paren' or
1045 'show-paren-when-point-in-periphery'.
1048 ** If gpg2 exists on the system, it is now used as the default value
1049 of 'epg-gpg-program' (instead of gpg).
1054 *** Images are automatically scaled before displaying based on the
1055 'image-scaling-factor' variable (if Emacs supports scaling the images
1059 *** Images inserted with 'insert-image' and related functions get a
1060 keymap put into the text properties (or overlays) that span the
1061 image. This keymap binds keystrokes for manipulating size and
1062 rotation, as well as saving the image to a file. These commands are
1063 also available in 'image-mode'.
1066 *** A new library for creating and manipulating SVG images has been
1067 added. See the "SVG Images" section in the lispref manual for
1071 *** New setf-able function to access and set image parameters is
1072 provided: 'image-property'.
1078 *** Strings after ':documentation' are highlighted as docstrings.
1079 This enhances Lisp mode fontification to handle documentation of the
1080 form '(:documentation "the doc string")' used in Common Lisp code for
1081 CLOS class and slot documentation.
1083 ** Rectangle editing
1086 *** Rectangle Mark mode can have corners past EOL or in the middle of a TAB.
1089 *** C-x C-x in rectangle-mark-mode now cycles through the four corners.
1090 *** 'string-rectangle' provides on-the-fly preview of the result.
1093 ** New font-lock functions 'font-lock-ensure' and 'font-lock-flush'.
1094 These should be used in preference to 'font-lock-fontify-buffer' when
1098 ** Macro 'minibuffer-with-setup-hook' can optionally append a function
1099 to 'minibuffer-setup-hook'.
1101 If the first argument of the macro is of the form '(:append FUN)',
1102 then FUN will be appended to 'minibuffer-setup-hook', instead of
1107 *** New functions 'cl-fresh-line', 'cl-digit-char-p', and 'cl-parse-integer'.
1110 *** 'pcase' accepts the new UPattern 'cl-struct'.
1112 ** Calendar and diary
1115 *** The default 'diary-file' is now located in .emacs.d.
1118 *** New commands to insert diary entries with Chinese dates:
1119 'diary-chinese-insert-anniversary-entry' 'diary-chinese-insert-entry'
1120 'diary-chinese-insert-monthly-entry', 'diary-chinese-insert-yearly-entry'.
1123 *** The calendar can now list and mark diary entries with Chinese dates.
1124 See 'diary-chinese-list-entries' and 'diary-chinese-mark-entries'.
1127 *** The option 'calendar-mode-line-format' can now be nil,
1128 which means to do nothing special with the mode line in calendars.
1131 *** New option 'calendar-weekend-days'.
1132 The option customizes which day headers receive the
1133 'calendar-weekend-header' face.
1136 *** New optional args N and STRING for 'holiday-greek-orthodox-easter'.
1139 *** Many items obsolete since at least version 23.1 have been removed.
1140 The majority were function/variable/face aliases, too numerous to list here.
1143 **** Functions 'calendar-one-frame-setup', 'calendar-only-one-frame-setup',
1144 'calendar-two-frame-setup', 'european-calendar', 'american-calendar'.
1146 **** Hooks 'cal-menu-load-hook', 'cal-x-load-hook'.
1148 **** Macro 'calendar-for-loop'.
1150 **** Variables 'european-calendar-style', 'diary-face', 'hebrew-holidays-{1,4}'.
1152 **** The nil and list forms of 'diary-display-function'.
1155 ** New ERT function 'ert-summarize-tests-batch-and-exit'.
1156 If the output of ERT tests in batch mode execution can be saved to a
1157 log file, then it can be passed as an argument to the above function
1158 to produce a neat summary.
1161 ** New js.el option 'js-indent-first-init'.
1166 ** Info mode now displays symbol names in fixed-pitch font.
1167 If you want to get the old behavior back, customize the 'Info-quoted'
1168 face to use the same definitions as the default face.
1171 *** 'Info-fontify-maximum-menu-size' can be t for no limit.
1174 *** 'info-display-manual' can now be given a prefix argument which (any
1175 non-nil value) directs the command to limit the completion
1176 alternatives to currently visited manuals.
1179 ** ntlm.el has support for NTLM2.
1184 *** The Rmail commands 'd', 'C-d' and 'u' take optional repeat counts
1185 to delete or undelete multiple messages.
1188 *** Rmail can now render HTML mail messages if your Emacs was built with
1189 libxml2 or if you have the Lynx browser installed. By default, Rmail
1190 will display the HTML version of a mail message that has both HTML and
1191 plain text parts, if display of HTML email is possible; customize the
1192 'rmail-mime-prefer-html' option to 'nil' if you don't want that.
1195 *** In the commands that make summaries by subject, recipients, or senders,
1196 you can no longer use commas to separate regular expressions.
1199 ** SES now supports local printer functions; see 'ses-define-local-printer'.
1201 ** Shell-script Mode
1203 *** In sh-mode you can now use 'sh-shell' as a file-local variable to
1204 specify the type of shell in use (bash, csh, etc).
1207 *** New value 'always' for 'sh-indent-after-continuation'.
1208 This provides old-style ("dumb") indentation of continued lines.
1209 See the doc string of 'sh-indent-after-continuation' for details.
1213 *** Fatal TLS errors are now silent by default.
1216 *** If Emacs isn't built with TLS support, an external TLS-capable
1217 program is used instead. This program used to be run in --insecure
1218 mode by default, but has now changed to be secure instead, and will
1219 fail if you try to connect to non-verifiable hosts. This is
1220 controlled by the 'tls-program' variable.
1225 *** The URL package accepts now the protocols "ssh", "scp" and "rsync".
1226 When 'url-handler-mode' is enabled, file operations for these
1227 protocols as well as for "telnet" and "ftp" are passed to Tramp.
1230 *** The URL package allows customizing the 'url-user-agent' string.
1231 The new 'url-user-agent' variable can be customized to be a string or
1235 *** The new interface variable 'url-request-noninteractive' can be used
1236 to specify that we're running in a noninteractive context, and that
1237 we should not be queried about things like TLS certificate validity.
1240 *** 'url-mime-accept-string' can now be used as in "interface"
1241 variable, meaning you can bind it around an 'url-retrieve' call.
1244 *** If URL is used with a https connection, the first callback argument
1245 plist will contain a :peer element that has the output of
1246 'gnutls-peer-status' (if Emacs is built with GnuTLS support).
1249 *** The new function 'url-cookie-delete-cookie' can be used to
1250 programmatically delete all cookies, or cookies from a specific
1253 *** The URL package now support https over proxies supporting CONNECT.
1258 *** New connection method "afp", which allows you to access Mac OS X
1259 volumes via the Apple Filing Protocol.
1262 *** New connection method "nc", which allows you to access dumb
1266 *** Method-specific parameters can be overwritten now with variable
1267 'tramp-connection-properties'.
1270 *** Handler for 'file-notify-valid-p' for remote machines that support
1271 filesystem notifications.
1276 *** New user variable 'sql-default-directory' enables remote
1277 connections using Tramp.
1280 *** New command 'sql-send-line-and-next'.
1281 This command, bound to 'C-c C-n' by default, sends the current line to
1282 the SQL process and advances to the next line, skipping whitespace and
1286 *** Added support for Vertica SQL.
1288 ** VC and related modes
1291 *** Basic push support, via 'vc-push', bound to 'C-x v P'.
1292 Implemented for Bzr, Git, Hg. As part of this change, the pre-existing
1293 (undocumented) command vc-hg-push now behaves slightly differently.
1296 *** The new command vc-region-history shows the log+diff of the active region.
1299 *** You can refresh the VC state of a file buffer with 'M-x vc-refresh-state'.
1300 This command is useful when you perform version control commands
1301 outside Emacs (e.g., from the shell prompt), or if you switch the VC
1302 back-end for the buffer's file, or remove it from version control.
1305 *** The VC state indicator in the mode line now defaults to more
1306 colorful faces to make it more obvious to the user what the state is.
1307 See the 'vc-faces' customization group.
1310 *** New option 'vc-annotate-background-mode' controls whether
1311 the color range from 'vc-annotate-color-map' is applied to the
1312 background or to the foreground.
1315 *** New options for customizing encoding of Git commit log messages.
1316 The new options `vc-git-commits-coding-system' and
1317 `vc-git-log-output-coding-system' allow to customize the encoding of
1318 the log messages sent to Git when committing, and the decoding of the
1319 log messages read from Git history commands. Both default to UTF-8;
1320 if you customize them, make sure they are consistent with the Git
1321 config variables i18n.commitEncoding and i18n.logOutputEncoding.
1322 (`vc-git-commits-coding-system' existed previously, but was a
1323 variable, not a user option.)
1326 *** 'compare-windows' now compares text with the most recently selected window
1327 instead of the next window. If you want the previous behavior of
1328 comparing with the next window, customize the new option
1329 'compare-windows-get-window-function' to the value
1330 'compare-windows-get-next-window'.
1333 *** Two new faces 'compare-windows-removed' and 'compare-windows-added'
1334 replace the face 'compare-windows', which is now an obsolete alias for
1335 'compare-windows-added'.
1338 *** The VC state indicator in the mode line now has different faces
1339 corresponding to each of the possible states. See the 'vc-faces'
1340 customization group.
1343 *** 'log-edit-insert-changelog' converts "(tiny change)" to
1344 "Copyright-paperwork-exempt: yes". Set 'log-edit-rewrite-tiny-change'
1345 nil to disable this.
1348 ** VHDL mode now supports VHDL'08.
1353 *** Decimal display mode uses "," groups, so it's more
1354 fitting for use in money calculations
1357 *** Factorial works with non-integer inputs.
1362 *** Hide-IfDef mode now support full C/C++ expressions in macros,
1363 macro argument expansion, interactive macro evaluation and automatic
1364 scanning of #define'd symbols.
1367 *** New command 'hif-evaluate-macro', bound to 'C-c @ e', displays the
1368 result of evaluating a macro.
1371 *** New command 'hif-clear-all-ifdef-define', bound to 'C-c @ C', clears
1372 all defined symbols in 'hide-ifdef-env'.
1375 *** New custom variable 'hide-ifdef-header-regexp' to define C/C++ header
1376 file name patterns. Defaults to files whose extension is one of '.h',
1377 '.hh', '.hpp', '.hxx', or '.h++', matched case-insensitively.
1380 *** New custom variable 'hide-ifdef-expand-reinclusion-protection' to prevent
1381 reinclusion protected (a.k.a. "idempotent") header files from being hidden.
1382 (This could happen when an idempotent header file is visited again,
1383 when its guard symbol is already defined.) Defaults to 't'.
1386 *** New custom variable 'hide-ifdef-exclude-define-regexp' to define symbol
1387 name patterns (e.g. all "FOR_DOXYGEN_ONLY_*") to be ignored when
1388 looking for macro definitions. By default, no symbols are ignored.
1393 *** New custom variable 'tex-print-file-extension' to help users who
1394 use PDF instead of DVI.
1397 *** TeX mode now supports Prettify Symbols mode. When enabling
1398 'prettify-symbols-mode' in a tex-mode buffer, \alpha ... \omega, and
1399 many other math macros are displayed using unicode characters.
1402 ** New 'big-indent' style in 'whitespace-mode' highlights deep indentation.
1403 By default, 32 consecutive spaces or four consecutive TABs are
1404 considered to be too deep, but the new variable
1405 'whitespace-big-indent-regexp' can be customized to change that.
1408 ** New options in 'tildify-mode'.
1409 New options 'tildify-space-string', 'tildify-pattern', and
1410 'tildify-foreach-region-function' variables make
1411 'tildify-string-alist', 'tildify-pattern-alist', and
1412 'tildify-ignored-environments-alist' variables (as well as a few
1413 helper functions) obsolete.
1416 ** New package Xref replaces Etags's front-end and UI
1418 The new package Xref provides a generic framework and new commands to
1419 find and move to definitions of functions, macros, data structures
1420 etc., as well as go back to the location where you were before moving
1421 to a definition. It supersedes and obsoletes many Etags commands,
1422 while still using the etags.el code that reads the TAGS tables as one
1425 The command 'xref-find-definitions' replaces 'find-tag' and provides
1426 an interface to pick one definition among several.
1427 'tags-loop-continue' is now unbound. 'xref-pop-marker-stack' replaces
1428 'pop-tag-mark', but has a keybinding ('M-,') different from the one
1429 'pop-tag-mark' used.
1431 'xref-find-definitions-other-window' replaces 'find-tag-other-window'.
1432 'xref-find-definitions-other-frame' replaces 'find-tag-other-frame'.
1433 'xref-find-apropos' replaces 'find-tag-regexp'.
1435 As a result of this, the following commands are now obsolete:
1436 'find-tag-other-window', 'find-tag-other-frame', 'find-tag-regexp',
1439 'tags-loop-continue' is not obsolete because it's still useful in
1440 'tags-search' and 'tags-query-replace', for which there are no direct
1444 *** Variants of 'tags-search' and 'tags-query-replace' in Dired were also
1445 replaced by xref-style commands, see the "Dired" section below.
1450 'find-tag-marker-ring-length' is now an obsolete alias for
1451 'xref-marker-ring-length'. 'find-tag-marker-ring' is now an obsolete
1452 alias for a private variable. 'xref-push-marker-stack' and
1453 'xref-pop-marker-stack' should be used instead to manipulate the stack
1454 of searches for definitions.
1457 *** 'xref-find-definitions' and 'describe-function' now display
1458 information about mode local overrides (defined by cedet/mode-local.el
1459 'define-overloadable-function' 'define-mode-local-overrides').
1461 The framework's Lisp API is still experimental and can change in major,
1462 backward-incompatible ways.
1465 ** New package Project
1467 The new package Project provides generic infrastructure for dealing
1468 with projects. The main commands included in it are
1469 'project-find-file' and 'project-find-regexp'.
1471 The Lisp API of this package is still experimental.
1474 EUDC's LDAP backend has been improved.
1477 *** EUDC supports LDAP-over-SSL URLs (ldaps://).
1480 *** EUDC passes LDAP passwords through a pipe to the ldapsearch
1481 subprocess instead of on the command line.
1484 *** EUDC handles LDAP wildcards automatically so the user shouldn't
1485 need to configure this manually anymore.
1488 *** The LDAP configuration section of EUDC's manual has been
1491 There have also been customization changes.
1494 *** New custom variable 'eudc-server-hotlist' to allow specifying
1495 multiple EUDC servers in init file.
1498 *** Custom variable 'eudc-inline-query-format' defaults to completing
1499 on email and firstname instead of surname.
1502 *** Custom variable 'eudc-expansion-overwrites-query' defaults to nil
1503 to avoid interfering with the kill ring.
1506 *** Custom variable 'eudc-inline-expansion-format' defaults to
1507 "Firstname Surname <mail-address>".
1510 *** Custom variable 'eudc-options-file' defaults to
1511 "~/.emacs.d/eudc-options".
1514 *** New custom variable 'ldap-ldapsearch-password-prompt-regexp' to
1515 allow overriding the regular expression that recognizes the ldapsearch
1516 command line's password prompt.
1519 EUDC's BBDB backend now supports BBDB 3.
1522 EUDC's PH backend (eudcb-ph.el) is obsolete.
1527 *** The new built-in command 'clear' can scroll window contents out of sight.
1528 If provided with an optional non-nil argument, the scrollback contents will be cleared.
1531 *** New buffer syntax '#<buffer-name>', which is equivalent to
1532 '#<buffer buffer-name>'. This shorthand makes interacting with
1533 buffers from eshell more convenient. Custom variable
1534 'eshell-buffer-shorthand', which has been broken for a while, has been
1538 *** By default, eshell "visual" program buffers (created by
1539 'eshell-visual-commands' and similar custom vars) are no longer killed
1540 when their processes die. This fixes issues with short-lived commands
1541 and makes visual programs more useful in general. For example, if
1542 "git log" is a visual command, it will always show the visual command
1543 buffer, even if the "git log" process dies. For the old behavior,
1544 make the new option 'eshell-destroy-buffer-when-process-dies' non-nil.
1549 *** Support for the Google Chrome web browser.
1552 *** Support for the Conkeror web browser.
1555 *** Support for several ancient browsers is now officially obsolete.
1558 ** tar-mode: new 'tar-new-entry' command, allowing for new members to
1559 be added to the archive.
1564 *** Dired buffers are also auto-reverted via file notifications, if
1565 Emacs is compiled with file notification support.
1568 *** 'auto-revert-use-notify' is set to nil in 'global-auto-revert-mode'.
1569 See <http://debbugs.gnu.org/22814>.
1571 ** File Notifications
1574 *** The kqueue library is integrated for *BSD and Mac OS X machines.
1577 *** The new event 'stopped' signals, that a file notification watch is
1578 not active any longer.
1581 *** The new function 'file-notify-valid-p' checks, whether a file
1582 notification descriptor still corresponds to an activate watch.
1587 *** The command 'dired-do-compress' bound to 'Z' now can compress
1588 directories and decompress zip files.
1591 *** New command 'dired-do-compress-to' bound to 'c' can be used to
1592 compress many marked files into a single named archive. The
1593 compression command is determined from the new
1594 'dired-compress-files-alist' variable.
1597 *** In wdired, when editing files to contain slash characters,
1598 the resulting directories are automatically created. Whether
1599 to do this or not is controlled by the
1600 'wdired-create-parent-directories' variable.
1603 *** 'W' is now bound to 'browse-url-of-dired-file', and is useful for
1604 viewing HTML files and the like.
1606 *** New user interface for the 'A' and 'Q' commands.
1607 These keys, now bound to 'dired-do-find-regexp' and
1608 'dired-do-find-regexp-and-replace', work similarly to 'xref-find-apropos'
1609 and 'xref-query-replace-in-results': they present the matches
1610 in the '*xref*' buffer and let you move through the matches. No need
1611 to use 'tags-loop-continue' to resume the search or replace loop. The
1612 previous commands, 'dired-do-search' and
1613 'dired-do-query-replace-regexp', are still available, but not bound to
1614 keys; rebind 'A' and 'Q' to invoke them if you want the old behavior
1615 back. We intend to obsolete the old commands in a future release.
1617 ** Tabulated List Mode
1620 *** It is now safe for a mode that derives 'tabulated-list-mode' to not
1621 call 'tabulated-list-init-header', in which case it will have no
1625 *** 'tabulated-list-print' takes a second optional argument, update,
1626 which specifies an alternative printing method which is faster when
1627 few or no entries have changed.
1629 ** Obsolete packages
1635 *** landmark.el (moved to elpa.gnu.org)
1638 * New Modes and Packages in Emacs 25.1
1641 ** pinentry.el allows GnuPG passphrase to be prompted through the
1642 minibuffer instead of a graphical dialog, depending on whether the gpg
1643 command is called from Emacs (i.e., INSIDE_EMACS environment variable
1644 is set). This feature requires newer versions of GnuPG (2.1.5 or
1645 later) and Pinentry (0.9.5 or later). To use this feature, add
1646 "allow-emacs-pinentry" to "~/.gnupg/gpg-agent.conf" and reload the
1647 configuration with "gpgconf --reload gpg-agent".
1650 ** cl-generic.el provides CLOS-style multiple-dispatch generic functions.
1651 The main entry points are 'cl-defgeneric' and 'cl-defmethod'. See the
1652 node "Generic Functions" in the Emacs Lisp manual for more details.
1655 ** scss-mode (a minor variant of css-mode) is a major mode for editing
1656 SCSS (Sassy CSS) files.
1659 ** let-alist is a new macro (and a package) that allows one to easily
1660 let-bind the values stored in an alist.
1663 ** 'tildify-mode' allows automatic insertion of hard spaces as one
1664 types the text. Breaking line after a single-character words is
1665 forbidden by Czech and Polish typography (and may be discouraged in
1666 other languages), so 'auto-tildify-mode' makes it easier to create
1667 a typographically-correct documents.
1670 ** The 'seq' library adds sequence manipulation functions and macros
1671 that complement basic functions provided by subr.el. All functions
1672 are prefixed with 'seq-' and work on lists, strings and vectors.
1673 'pcase' accepts a new Upattern 'seq'.
1676 ** The 'map' library provides map-manipulation functions that work on
1677 alists, hash-table and arrays. All functions are prefixed with
1678 'map-'. 'pcase' accepts a new UPattern 'map'.
1681 ** The 'thunk' library provides functions and macros to control the
1682 evaluation of forms.
1685 ** js-jsx-mode (a minor variant of js-mode) provides indentation
1686 support for JSX, an XML-like syntax extension to ECMAScript.
1689 * Incompatible Lisp Changes in Emacs 25.1
1692 ** 'setq' and 'setf' must now be called with an even number of
1693 arguments. The earlier behavior of silently supplying a nil to the
1694 last variable when there was an odd number of arguments has been
1698 ** 'syntax-begin-function' is declared obsolete.
1699 Removed font-lock-beginning-of-syntax-function and the SYNTAX-BEGIN
1700 slot in font-lock-defaults.
1703 ** The new implementation of Subword mode affects word movement everywhere.
1704 When Subword mode is turned on, 'forward-word', 'backward-word', and
1705 everything that uses them will move by sub-words, effectively
1706 overriding the buffer's syntax table. Lisp programs that shouldn't be
1707 affected by Subword mode should call the new functions
1708 'forward-word-strictly' and 'backward-word-strictly' instead.
1711 ** 'package-initialize' now sets 'package-enable-at-startup' to nil if
1712 called during startup. Users who call this function in their init
1713 file and still expect it to be run after startup should set
1714 'package-enable-at-startup' to t after the call to
1715 'package-initialize'.
1718 ** ':global' minor mode use 'setq-default' rather than 'setq'.
1719 This means that you can't use 'make-local-variable' and expect them to
1720 "magically" become buffer-local.
1723 ** 'track-mouse' no longer freezes the shape of the mouse pointer.
1724 The 'track-mouse' form no longer refrains from changing the shape of
1725 the mouse pointer for the entire time the body of that form is
1726 executed. Lisp programs that use 'track-mouse' for dragging across
1727 large portions of the Emacs display, and want to avoid changes in the
1728 pointer shape during dragging, should bind the variable 'track-mouse'
1729 to the special value 'dragging' in the body of the form.
1732 ** The optional 'predicate' argument of 'lisp-complete-symbol' no longer
1733 has any effect. (This change was made in Emacs 24.4 but was not
1734 advertised at the time.)
1737 ** 'indirect-function' does not signal 'void-function' any more.
1738 This is mostly a bug-fix, since this change was missed back in 24.4 when
1739 symbol-function was changed not to signal 'void-function' any more.
1742 *** As a consequence, the second arg of 'indirect-function' is now obsolete.
1745 ** M-x shell and M-x compile no longer set the EMACS environment variable.
1746 This avoids clashing when other programs use the variable for other purposes.
1747 Although M-x term still sets EMACS for compatibility with Bash 4.3 and earlier,
1748 this is deprecated and will be phased out when Bash 4.4 or later takes over.
1749 Use the INSIDE_EMACS environment variable instead.
1751 ** 'C-up', 'C-down', 'C-left' and 'C-right' are now defined in term
1752 mode to send the same escape sequences that xterm does. This makes
1753 things like forward-word in readline work.
1756 ** hideshow mode got four key bindings that are analogous to outline
1757 mode bindings: 'C-c @ C-a', 'C-c @ C-t', 'C-c @ C-d', and 'C-c @ C-e.'
1760 ** 'save-excursion' does not save&restore the mark any more.
1761 Use 'save-mark-and-excursion' if you want the old behavior.
1764 ** 'read-buffer' and 'read-buffer-function' can now be called with a 4th
1765 argument ('predicate').
1768 ** 'completion-table-dynamic' by default stays in the minibuffer.
1769 The minibuffer will be the current buffer when the function is called.
1770 If you want the old behavior of calling the function in the buffer
1771 from which the minibuffer was entered, use the new argument
1772 'switch-buffer' to 'completion-table-dynamic'.
1775 ** window-configurations no longer record the buffers' marks.
1778 ** inhibit-modification-hooks now also inhibits lock-file checks, as well as
1779 active region handling.
1782 ** deactivate-mark is now buffer-local.
1785 ** 'cl-the' now asserts that its argument is of the given type.
1788 ** 'process-running-child-p' may now return a numeric process
1789 group ID instead of 't'.
1792 ** Mouse click events on mode line or header line no longer include
1793 any reference to a buffer position. The 6th member of the mouse
1794 position list returned for such events is now nil.
1797 ** Menu items in keymaps do not support the "key shortcut cache" any more.
1798 These slots used to hold key-shortcut data, but have been obsolete since
1802 ** Emacs no longer downcases the first letter of a system diagnostic
1803 when signaling a file error. For example, it now reports "Permission
1804 denied" instead of "permission denied". The old behavior was problematic
1805 in languages like German where downcasing rules depend on grammar.
1808 ** New variable 'text-quoting-style' to control how Emacs translates quotes.
1809 Set it to 'curve' for curved single quotes, to 'straight' for straight
1810 apostrophes, and to 'grave' for grave accent and apostrophe. The
1811 default value nil acts like 'curve' if curved single quotes are
1812 displayable, and like 'grave' otherwise. The new variable affects
1813 display of diagnostics and help, but not of info.
1816 ** substitute-command-keys now replaces quotes.
1817 That is, it converts documentation strings' quoting style as per the
1818 value of 'text-quoting-style'. Doc strings in source code can use
1819 either curved single quotes or grave accents and apostrophes. As
1820 before, characters preceded by \= are output as-is.
1823 ** Message-issuing functions 'error', 'message', etc. now convert quotes.
1824 They use the new 'format-message' function instead of plain 'format',
1825 so that they now follow user preference as per 'text-quoting-style'
1826 when processing curved single quotes, grave accents, and apostrophes
1827 in their format argument.
1830 ** The character classes [:alpha:] and [:alnum:] in regular expressions
1831 now match multibyte characters using Unicode character properties.
1832 If you want the old behavior where they matched any character with
1833 word syntax, use '\sw' instead.
1836 ** The character classes [:graph:] and [:print:] in regular expressions
1837 no longer match every multibyte character. Instead, Emacs now
1838 consults the Unicode character properties to determine which
1839 characters are graphic or printable. In particular, surrogates and
1840 unassigned codepoints are now rejected. If you want the old behavior,
1841 use [:multibyte:] instead.
1844 ** The 'diff' command uses the unified format now. To restore the old
1845 behavior, set 'diff-switches' to '-c'.
1848 ** 'grep-template' and 'grep-find-template' values don't include the
1849 --color argument anymore. It's added at the <C> place holder position
1850 dynamically. Any third-party code that changes these templates should
1851 be updated accordingly.
1853 ** The grep/rgrep/lgrep functions will now ask about saving files
1854 before running. This is controlled by the 'grep-save-buffers'
1858 ** '(/ N)' is now equivalent to '(/ 1 N)' rather than to '(/ N 1)'.
1859 The new behavior is compatible with Common Lisp and with XEmacs.
1860 This change does not affect Lisp code intended to be portable to
1861 Emacs 24.2 and earlier, which did not support unary '/'.
1864 ** The 'default-directory' value doesn't have to end slash. To make
1865 that happen, 'unhandled-file-name-directory' now defaults to calling
1866 'file-name-as-directory'.
1869 * Lisp Changes in Emacs 25.1
1873 *** New UPatterns 'quote', 'app'.
1875 *** New UPatterns can be defined with 'pcase-defmacro'.
1877 *** New vector QPattern.
1880 ** syntax-propertize is now automatically called on-demand during forward
1881 parsing functions like 'forward-sexp'.
1884 ** New hooks 'prefix-command-echo-keystrokes-functions' and
1885 'prefix-command-preserve-state-hook' allow the definition of prefix
1886 commands other than the predefined 'C-u'.
1889 ** New functions 'filepos-to-bufferpos' and 'bufferpos-to-filepos'.
1890 These allow conversion between buffer positions and the corresponding
1891 file byte offsets, given the file's encoding.
1894 ** The default value of 'load-read-function' is now 'read'.
1895 Previously, the default value of 'nil' implied using 'read'.
1898 ** New hook 'pre-redisplay-functions'.
1899 It is a bit easier to use than 'pre-redisplay-function'.
1902 ** The second arg of 'looking-back' should always be provided explicitly.
1903 Previously, it was an optional argument, now it's mandatory.
1906 ** Text properties 'intangible', 'point-entered', and 'point-left' are obsolete.
1907 Replaced by properties 'cursor-intangible' and 'cursor-sensor-functions',
1908 implemented by the new 'cursor-intangible-mode' and
1909 'cursor-sensor-mode' minor modes.
1912 ** 'inhibit-point-motion-hooks' now defaults to 't' and is obsolete.
1913 Use the new minor modes 'cursor-intangible-mode' and
1914 'cursor-sensor-mode' instead.
1917 ** New process type 'pipe', which can be used in combination with the
1918 ':stderr' keyword of make-process to handle standard error output
1922 ** New function 'make-process' provides an alternative interface to
1923 'start-process'. It allows programs to set process parameters such as
1924 process filter, sentinel, etc., through keyword arguments (similar to
1925 'make-network-process').
1928 ** A new function 'directory-files-recursively' returns all matching
1929 files (recursively) under a directory.
1932 ** New variable 'inhibit-message', when bound to non-nil, inhibits
1933 'message' and related functions from displaying messages in the echo
1934 area. The output is still logged to the *Messages* buffer.
1937 ** A new text property 'inhibit-read-only' can be used in read-only
1938 buffers to allow certain parts of the text to be writable.
1941 ** A new variable 'comment-end-can-be-escaped' is useful in languages
1942 such as C and C++ where line comments with escaped newlines are
1943 continued to the next line.
1946 ** New macro 'define-advice'.
1949 ** Emacs Lisp now supports generators.
1950 See the "Generators" section of the ELisp manual for the details.
1953 ** New finalizer facility for running code when objects become unreachable.
1954 See the "Finalizer Type" subsection in the ELisp manual for the
1958 ** lexical closures can use (:documentation FORM) to build their docstring.
1959 It should be placed right where the docstring would be, and FORM is then
1960 evaluated (and should return a string) when the closure is built.
1963 ** The new command 'fortune-message' has been added, which displays
1964 fortunes in the echo area.
1967 ** define-inline provides a new way to define inlinable functions.
1970 ** New function 'macroexpand-1' to perform a single step of macro expansion.
1973 ** Some "x-*" functions were obsoleted and/or renamed:
1974 *** x-select-text is renamed gui-select-text.
1975 *** x-selection-value is renamed gui-selection-value.
1976 *** x-get-selection is renamed gui-get-selection.
1977 *** x-get-clipboard and x-clipboard-yank are marked obsolete.
1978 *** x-get-selection-value is renamed to gui-get-primary-selection.
1979 *** x-set-selection is renamed to gui-set-selection
1982 ** New function 'string-greaterp', which return the opposite result of
1986 ** The new functions 'string-collate-lessp' and 'string-collate-equalp'
1987 preserve the collation order as defined by the system's locale(1)
1988 environment. For the time being this is implemented for modern POSIX
1989 systems and for MS-Windows, for other systems they fall back to their
1990 counterparts 'string-lessp' and 'string-equal'.
1993 ** The new function 'string-version-lessp' compares strings by
1994 interpreting consecutive runs of numerical characters as numbers, and
1995 compares their numerical values. According to this predicate,
1996 "foo2.png" is smaller than "foo12.png".
1999 *** The ls-lisp package uses 'string-collate-lessp' to sort file names.
2000 The effect is that, on systems that use ls-lisp for Dired, the default
2001 sort order of the files in Dired is now different from what it was in
2002 previous versions of Emacs. In particular, the file names are sorted
2003 disregarding punctuation, accents, and diacritics, and letter case is
2004 ignored. For example, files whose name begin with a period will no
2005 longer appear near the beginning of the directory listing. If you
2006 want the old, locale-independent sorting, customize the new option
2007 'ls-lisp-use-string-collate' to the nil value.
2010 *** The MS-Windows specific variable 'w32-collate-ignore-punctuation',
2011 if set to a non-nil value, causes the above 2 functions to ignore
2012 symbol and punctuation characters when collating strings. This
2013 emulates the behavior of modern Posix platforms when the locale's
2014 codeset is "UTF-8" (as in "en_US.UTF-8"). This is needed because
2015 MS-Windows doesn't support UTF-8 as codeset in its locales.
2018 ** New function 'alist-get', which is also a valid place (aka lvalue).
2021 ** New function 'funcall-interactively', which works like 'funcall'
2022 but makes 'called-interactively-p' treat the function as (you guessed it)
2023 called interactively.
2026 ** New function 'function-put' to use instead of 'put' for function properties.
2029 ** The new function 'bidi-find-overridden-directionality' allows you to
2030 find characters whose directionality was, perhaps maliciously,
2031 overridden by directional override control characters. Lisp programs
2032 can use this to detect potential phishing of URLs and other links that
2033 exploits bidirectional display reordering.
2036 ** The new function 'buffer-substring-with-bidi-context' allows you to
2037 copy a portion of a buffer into a different location while preserving
2038 the visual appearance both of the copied text and the text at
2039 destination, even when the copied text includes mixed bidirectional
2040 text and directional control characters.
2043 ** New properties that can be specified with 'declare':
2044 *** (interactive-only INSTEAD), says to use INSTEAD for non-interactive use.
2045 *** (pure VAL), if VAL is non-nil, indicates the function is pure.
2046 *** (side-effect-free VAL), if VAL is non-nil, indicates the function does not
2050 ** New macro 'with-file-modes', for evaluating expressions with default file
2051 permissions set to temporary values (e.g., for creating private files).
2054 ** You can access the slots of structures using 'cl-struct-slot-value'.
2057 ** Function 'sort' can deal with vectors.
2060 ** Function 'system-name' now returns an updated value if the current
2061 system's name has changed or if the Emacs process has changed systems,
2062 and to avoid long waits it no longer consults DNS to canonicalize the
2063 name. The variable 'system-name' is now obsolete.
2066 ** Function 'write-region' no longer outputs "Wrote FILE" in batch mode.
2069 ** If 'pwd' is called with a prefix argument, insert the current default
2073 ** New functions return extended information about fonts and faces.
2076 *** The function 'font-info' now returns more details about a font.
2077 In particular, it now returns the average width of the font's
2078 characters, which can be used for geometry-related calculations.
2081 *** A new function 'default-font-width' returns the average width of a
2082 character in the current buffer's default font. If the default face
2083 is remapped (see 'face-remapping-alist'), the value for the remapped
2084 face is returned. This function complements the existing function
2085 'default-font-height'.
2088 *** New functions 'window-font-height' and 'window-font-width' return
2089 the height and average width of characters in a specified face and
2090 window. If FACE is remapped (see 'face-remapping-alist'), the
2091 function returns the information for the remapped face.
2094 *** A new function 'window-max-chars-per-line' returns the maximal
2095 number of characters that can be displayed on one line. If a face
2096 and/or window are provided, these values are used for the
2097 calculation. This function is different from 'window-body-width' in
2098 that it accounts for (i) continuation glyphs, (ii) the size of the
2099 font, and (iii) the specified window.
2102 ** New utilities in subr-x.el:
2103 *** New macros 'if-let' and 'when-let' allow defining bindings and to
2104 execute code depending whether all values are true.
2105 *** New macros 'thread-first' and 'thread-last' allow threading a form
2106 as the first or last argument of subsequent forms.
2109 ** Documentation strings now support quoting with curved single quotes
2110 in addition to the old style with grave accent and apostrophe. The
2111 new style looks better on today's displays. In the new Electric Quote
2112 mode, you can enter curved single quotes into documentation by typing
2113 grave accent and apostrophe. Outside Electric Quote mode, you can
2114 enter them by typing 'C-x 8 [' and 'C-x 8 ]', or (if your Alt key
2115 works) by typing 'A-[' and 'A-]'. As described above under
2116 'text-quoting-style', the user can specify how to display doc string
2120 ** New function 'format-message' is like 'format' and also converts
2121 curved single quotes, grave accents and apostrophes as per
2122 'text-quoting-style'.
2125 ** show-help-function's arg is converted via substitute-command-keys
2126 before being passed to the function. Help strings, help-echo
2127 properties, etc. can therefore contain command key escapes and
2131 ** Time-related changes:
2133 *** Time conversion functions now accept an optional ZONE argument
2134 that specifies the time zone rules for conversion. ZONE is omitted or
2135 nil for Emacs local time, t for Universal Time, 'wall' for system wall
2136 clock time, or a string as in the TZ environment variable. The
2137 affected functions are 'current-time-string', 'current-time-zone',
2138 'decode-time', and 'format-time-string'. The function 'encode-time',
2139 which already accepted a simple time zone rule argument, has been
2140 extended to accept all the new forms.
2142 *** Incompatible change in the third argument of 'format-time-string'.
2143 Previously, any non-nil argument was interpreted as specifying Universal Time.
2144 This is no longer true; packages that want Universal Time should pass t
2145 as the third argument.
2147 *** Time-related functions now consistently accept numbers
2148 (representing seconds since the epoch) and nil (representing the
2149 current time) as well as the usual list-of-integer representation.
2150 Affected functions include 'current-time-string', 'current-time-zone',
2151 'decode-time', 'float-time', 'format-time-string', 'seconds-to-time',
2152 'time-add', 'time-less-p', 'time-subtract', 'time-to-day-in-year',
2153 'time-to-days', and 'time-to-seconds'.
2155 *** The 'encode-time-value' and 'with-decoded-time-value' macros have
2158 *** 'calendar-next-time-zone-transition', 'time-add', and
2159 'time-subtract' no longer return time values in the obsolete and
2160 undocumented integer-pair format. Instead, they return a list of two
2164 ** New function 'set-binary-mode' allows switching a standard stream
2165 of the Emacs process to binary I/O mode.
2168 ** The new function 'directory-name-p' can be used to check whether a file
2169 name (as returned from, for instance, 'file-name-all-completions') is
2170 a directory file name. It returns non-nil if the last character in
2171 the name is a directory separator character (forward slash on GNU and
2172 Unix systems, forward- or backslash on MS-Windows and MS-DOS).
2175 ** ASCII approximations to curved quotes are put in standard-display-table
2176 if the terminal cannot display curved quotes.
2179 ** Standard output and error streams now transliterate characters via
2180 standard-display-table, and encode output using locale-coding-system.
2181 To force a specific encoding, bind 'coding-system-for-write' to the
2182 coding-system of your choice when invoking functions like 'prin1' and
2186 ** New var 'truncate-string-ellipsis' to choose how to indicate truncation.
2189 ** New possible value for 'system-type': 'nacl'.
2190 This is used by Google's Native Client (NaCl).
2193 ** 'read-color' will now display the color names using the color itself
2194 as the background color.
2197 ** There is now a new variable 'flyspell-sort-corrections-function'
2198 that allows changing the way corrections are sorted.
2200 ** Miscellaneous name change
2203 For consistency with the usual Emacs spelling, the Lisp variable
2204 'hfy-optimisations' has been renamed to 'hfy-optimizations'.
2205 The old name should still work, as an obsolescent alias.
2207 ** Changes in Frame- and Window- Handling
2210 *** Emacs can now draw horizontal scroll bars on some platforms that
2211 provide toolkit scroll bars, namely Gtk+, Lucid, Motif and Windows.
2212 Horizontal scroll bars are turned off by default.
2214 **** New function 'horizontal-scroll-bars-available-p' telling whether
2215 horizontal scroll bars are available on the underlying system.
2217 **** New mode 'horizontal-scroll-bar-mode' to toggle horizontal scroll
2218 bars on all existing and future frames.
2220 **** New function 'toggle-horizontal-scroll-bar' to toggle horizontal
2221 scroll bars on the selected frame.
2223 **** New frame parameters 'horizontal-scroll-bars' and
2224 'scroll-bar-height' to set horizontal scroll bars and their height
2225 for individual frames and in 'default-frame-alist'.
2227 **** New functions 'frame-scroll-bar-height' and
2228 'window-scroll-bar-height' return the height of horizontal scroll
2229 bars on a specific frame or window.
2231 **** 'set-window-scroll-bars' now accepts five parameters where the last
2232 two specify height and type of the window's horizontal scroll bar.
2234 **** 'window-scroll-bars' now returns type and sizes of horizontal scroll
2237 **** New buffer-local variables 'horizontal-scroll-bar' and
2238 'scroll-bar-height'.
2241 *** New functions 'frame-geometry' and 'frame-edges' give access to a
2245 *** New functions 'mouse-absolute-pixel-position' and
2246 'set-mouse-absolute-pixel-position' get/set screen coordinates of the
2250 *** The function 'window-edges' now accepts three additional arguments to
2251 retrieve body, absolute and pixel edges of the window.
2254 *** The functions 'window-inside-edges', 'window-inside-pixel-edges' and
2255 'window-inside-absolute-pixel-edges' have been renamed to respectively
2256 'window-body-edges', 'window-body-pixel-edges' and
2257 'window-absolute-body-pixel-edges'. The old names are kept as aliases.
2260 *** New function 'window-absolute-pixel-position' to get the screen
2261 coordinates of a visible buffer position.
2264 *** The height of a frame's menu and tool bar are no longer counted in the
2265 frame's text height. This means that the text height stands only for
2266 the height of the frame's root window plus that of the echo area (if
2267 present). This was already the behavior for frames with external tool
2268 and menu bars (like in the Gtk builds) but has now been extended to all
2272 *** Frames now do not necessarily preserve the number of columns or lines
2273 they display when setting default font, menu bar, fringe width, or
2274 scroll bars. In particular, maximized and fullscreen frames are
2275 conceptually never resized if such settings change. For fullheight and
2276 fullwidth frames, the behavior may depend on the toolkit used.
2277 **** New option 'frame-inhibit-implied-resize' if non-nil, means that
2278 setting default font, menu bar, fringe width, or scroll bars of a
2279 specific frame does not resize that frame in order to preserve the
2280 number of columns or lines it displays.
2283 *** New function 'window-preserve-size' allows you to preserve the size of
2284 a window without "fixing" it. It's supported by 'fit-window-to-buffer',
2285 'temp-buffer-resize-mode' and 'display-buffer'.
2288 *** New 'display-buffer' action function 'display-buffer-use-some-frame'.
2289 This displays the buffer in an existing frame other than the current
2290 frame, and allows the caller to specify a frame predicate to exclude
2294 *** New minor mode 'window-divider-mode' and options
2295 'window-divider-default-places', 'window-divider-default-bottom-width'
2296 and 'window-divider-default-right-width'.
2299 *** The window displaying the '*Completions*' buffer with minibuffer
2300 completion candidates is now shown at the bottom of the selected
2301 frame. The size of that window is always as large as required to
2302 display all the candidates, except when limited by the minimum size
2303 of the other windows on that frame; those other windows are resized
2304 to provide space for the '*Completions*' display. The Emacs manual
2305 describes how to customize 'display-buffer-alist' to get back the old
2306 behavior, see the node "Temporary Displays" there.
2309 ** Tearoff menus and detachable toolbars for Gtk+ have been removed.
2310 Those features have been deprecated in Gtk+ for a long time.
2315 *** etags no longer qualifies class members by default.
2317 By default, 'etags' will not qualify class members for Perl and C-like
2318 object-oriented languages with their class names and namespaces, and
2319 will remove qualifications used explicitly in the code from the tag
2320 names it puts in TAGS files. This is so the etags.el back-end for
2321 'xref-find-definitions' is more accurate and produces less false
2324 Use --class-qualify (-Q) if you want the old default behavior of
2325 qualifying class members in C++, Java, Objective C, and Perl. Note
2326 that using -Q might make some class members become "unknown" to 'M-.'
2327 ('xref-find-definitions'); if so, you can use 'C-u M-.' to specify the
2328 qualified names by hand.
2331 *** New language Ruby
2333 Names of modules, classes, methods, functions, and constants are
2334 tagged. Overloaded operators are also tagged.
2338 Names of packages, functions, and types are tagged.
2341 *** Improved support for Lua
2343 Etags now tags functions even if the "function" keyword follows some
2344 whitespace at line beginning.
2347 * Changes in Emacs 25.1 on Non-Free Operating Systems
2350 ** MS-Windows specific Emacs build scripts are no longer in the distribution
2351 This includes the makefile.w32-in files in various subdirectories, and
2352 the support files. The file nt/configure.bat now just tells the user
2353 to use the procedure described in nt/INSTALL, by running the Posix
2354 'configure' script in the top-level directory.
2357 ** Building Emacs for MS-Windows requires at least Windows XP
2358 or Windows Server 2003. The built binaries still run on all versions
2359 of Windows starting with Windows 9X.
2362 ** Emacs running on MS-Windows now supports the daemon mode.
2365 ** The byte counts in etags-generated TAGS files are now the same on
2366 MS-Windows as they are on other platforms.
2369 ** On OS X, configure creates a Cocoa ("Nextstep") build by default.
2370 Pass '--without-ns' to configure to create an X11 build, the old default.
2373 ** OS X 10.5 or older is no longer supported.
2376 ** OS X on PowerPC is no longer supported.
2379 ** New variable 'ns-use-fullscreen-animation' controls animation for
2380 non-native NS fullscreen. The default is nil. Set to t to enable
2381 animation when entering and leaving fullscreen. For native OSX fullscreen
2385 ** The new function 'w32-application-type' returns the type of an
2386 MS-Windows application given the name of its executable program file.
2388 ** New variable 'w32-pipe-buffer-size'.
2389 It can be used to tune the size of the buffer of pipes created for
2390 communicating with subprocesses, when the program run by a subprocess
2391 exhibits unusual buffering behavior. Default is zero, which lets the
2392 OS use its default size.
2395 ----------------------------------------------------------------------
2396 This file is part of GNU Emacs.
2398 GNU Emacs is free software: you can redistribute it and/or modify
2399 it under the terms of the GNU General Public License as published by
2400 the Free Software Foundation, either version 3 of the License, or
2401 (at your option) any later version.
2403 GNU Emacs is distributed in the hope that it will be useful,
2404 but WITHOUT ANY WARRANTY; without even the implied warranty of
2405 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2406 GNU General Public License for more details.
2408 You should have received a copy of the GNU General Public License
2409 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2415 paragraph-separate: "[
\f]*$"