1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2014-2015 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 files NEWS.24, NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that all necessary documentation updates are complete.
19 (This means all relevant manuals in doc/ AND lisp doc-strings.)
20 --- means no change in the manuals is needed.
21 When you add a new item, use the appropriate mark if you are sure it applies,
22 otherwise leave it unmarked.
25 * Installation Changes in Emacs 25.1
29 ** Building Emacs now requires C99 or later.
31 ** The variable `redisplay-dont-pause' is obsolete.
33 ** Building Emacs now requires GNU make, version 3.81 or later.
36 ** `call-process-shell-command' and `process-file-shell-command'
37 don't take "&rest args" any more.
39 ** By default, Emacs no longer works on IRIX. We expect that Emacs
40 users are not affected by this, as SGI stopped supporting IRIX in
41 December 2013. If you are affected, please send a bug report. You
42 should be able to work around the problem either by porting the Emacs
43 undumping code to GCC under IRIX, or by configuring --with-wide-int,
44 or by sticking with Emacs 24.4.
48 ** 'configure' now prefers gnustep-config when configuring GNUstep.
49 If gnustep-config is not available, the old heuristics are used.
52 *** New option `erc-rename-buffers'.
55 *** New faces `erc-my-nick-prefix-face' and `erc-nick-prefix-face'.
58 *** `erc-format-@nick' displays all user modes instead of only op and voice.
61 *** The display of irc commands in the current buffer has been disabled.
64 *** `erc-version' now follows the Emacs version.
72 ** The configure option `--with-pkg-config-prog' has been removed.
73 Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to.
75 ** The configure option '--enable-silent-rules' is now the default,
76 and silent rules are now quieter. To get the old behavior where
77 'make' chatters a lot, configure with '--disable-silent-rules' or
78 build with 'make V=1'.
81 ** The configure option '--with-gameuser' now allows to specify a
82 group instead of a user if its argument is prefixed by ':' (a colon).
83 This will cause the game score files in ${localstatedir}/games/emacs
84 to be owned by that group, and the helper program for updating them to
85 be installed setgid. The option now defaults to the 'games' group.
88 ** The `grep-changelog' script (and its manual page) are no longer included.
89 It has no particular connection to Emacs and has not changed in years,
90 so if you want to use it, you can always take a copy from an older Emacs.
93 * Startup Changes in Emacs 25.1
96 * Changes in Emacs 25.1
98 ** New command `comment-line' bound to `C-x C-;'.
100 ** New function `custom-prompt-customize-unsaved-options' checks for
101 unsaved customizations and prompts user to customize (if found).
104 ** Network security (TLS/SSL certificate validity and the like) is
105 added via the new Network Security Manager (NSM) and controlled via
106 the `network-security-level' variable.
108 ** C-h l now also lists the commands that were run.
111 ** The new M-s M-w key binding uses eww to search the web for the
114 ** M-x suggests shorthands and ignores obsolete commands for completion.
115 ** x-select-enable-clipboard is renamed select-enable-clipboard.
116 x-select-enable-primary and renamed select-enable-primary.
117 Additionally they both now apply to all systems (OSX, GNUstep, Windows, you
118 name it), with the proviso that on some systems (e.g. Windows)
119 select-enable-primary is ineffective since the system doesn't
120 have the equivalent of a primary selection.
123 ** terpri gets an optional arg ENSURE to conditionally output a newline.
126 ** New macro `define-advice'.
128 ** `insert-register' now leaves point after the inserted text
129 when called interactively. A prefix argument toggles this behavior.
131 ** New var `truncate-string-ellipsis' to choose how to indicate truncation.
134 ** The new variable `term-file-aliases' replaces some files from lisp/term.
135 The function `tty-run-terminal-initialization' consults this variable
136 when deciding what terminal-specific initialization code to run.
139 ** New variable `system-configuration-features', listing some of the
140 main features that Emacs was compiled with. This is mainly intended
141 for use in Emacs bug reports.
144 ** A password is now hidden also when typed in batch mode. Another
145 hiding character but the default `.' can be used by let-binding the
146 variable `read-hide-char'.
148 ** The new functions `string-collate-lessp' and `string-collate-equalp'
149 preserve the collation order as defined by the system's locale(1)
150 environment. For the time being this is implemented for modern POSIX
151 systems and for MS-Windows, for other systems they fall back to their
152 counterparts `string-lessp' and `string-equal'.
154 *** The ls-lisp package uses `string-collate-lessp' to sort file names.
155 If you want the old, locale-independent sorting, customize the new
156 option `ls-lisp-use-string-collate' to a nil value.
158 *** The MS-Windows specific variable `w32-collate-ignore-punctuation',
159 if set to a non-nil value, causes the above 2 functions to ignore
160 symbol and punctuation characters when collating strings. This
161 emulates the behavior of modern Posix platforms when the locale's
162 codeset is "UTF-8" (as in "en_US.UTF-8"). This is needed because
163 MS-Windows doesn't support UTF-8 as codeset in its locales.
166 ** The new function `bidi-find-overridden-directionality' allows to
167 find characters whose directionality was, perhaps maliciously,
168 overridden by directional override control characters. Lisp programs
169 can use this to detect potential phishing of URLs and other links that
170 exploits bidirectional display reordering.
173 ** The new function `buffer-substring-with-bidi-context' allows to
174 copy a portion of a buffer into a different location while preserving
175 the visual appearance both of the copied text and the text at
176 destination, even when the copied text includes mixed bidirectional
177 text and directional control characters.
179 ** New variable `ns-use-fullscreen-animation' controls animation for
180 non-native NS fullscreen. The default is nil. Set to t to enable
181 animation when entering and leaving fullscreen. For native OSX fullscreen
184 ** A new text property `inhibit-read-only' can be used in read-only
185 buffers to allow certain parts of the text to be writable.
187 ** A new function `directory-files-recursively' returns all matching
188 files (recursively) under a directory.
190 ** The new `directory-name-p' can be used to check whether a file
191 name (as returned from, for instance, `file-name-all-completions' is
192 a directory file name. It returns non-nil if the last character in
193 the name is a forward slash.
196 ** New variable `fast-but-imprecise-scrolling' inhibits
197 fontification during full screen scrolling operations, giving less
198 hesitant operation during auto-repeat of C-v, M-v at the cost of
199 possible inaccuracies in the end position.
201 ** The function `font-info' now returns more details about a font.
202 In particular, it now returns the average width of the font's
203 characters, which can be used for geometry-related calculations.
206 * Editing Changes in Emacs 25.1
208 ** Unicode names entered via C-x 8 RET now use substring completion by default.
210 ** New minor mode global-eldoc-mode is enabled by default.
212 ** Emacs now supports "bracketed paste mode" when running on a terminal
213 that supports it. This facility allows Emacs to understand pasted
214 chunks of text as strings to be inserted, instead of interpreting each
215 character in the pasted text as actual user input. This results in a
216 paste experience similar to that under a window system, and significant
217 performance improvements when pasting large amounts of text.
219 ** Emacs now supports the latest version of the UBA.
220 The Emacs implementation of the Unicode Bidirectional Algorithm (UBA)
221 was updated to support all the latest additions and changes introduced
222 in Unicode Standard versions 6.3 and 7.0, and a few changes suggested
223 for Unicode 8.0. This includes full support for directional isolates
224 and the Bidirectional Parentheses Algorithm (BPA) specified by these
227 ** You can access `mouse-buffer-menu' (C-down-mouse-1) using C-f10.
230 * Changes in Specialized Modes and Packages in Emacs 25.1
232 *** `package-install-from-buffer' and `package-install-file' work on directories.
233 This follows the same rules as installing from a .tar file, except the
234 -pkg file is optional.
236 *** Packages which are dependencies of other packages cannot be deleted.
237 The FORCE argument to `package-delete' overrides this.
239 *** New custom variable `package-selected-packages' tracks packages
240 which were installed by the user (as opposed to installed as
241 dependencies). This variable can also be manually customized.
243 *** New command `package-install-user-selected-packages' installs all
244 packages from `package-selected-packages' which are currently missing.
246 *** New command `package-autoremove' removes all packages which were
247 installed strictly as dependencies but are no longer needed.
251 When you invoke `shell' interactively, the *shell* buffer will now
252 display in a new window. However, you can customize this behavior via
253 the `display-buffer-alist' variable. For example, to get
254 the old behavior -- *shell* buffer displays in current window -- use
255 (add-to-list 'display-buffer-alist
256 '("^\\*shell\\*$" . (display-buffer-same-window))).
260 *** The `:protection' slot option is not obeyed any more.
261 *** The `newname' argument to constructors is optional&deprecated.
262 If you need your objects to be named, do it by inheriting from `eieio-named'.
263 *** The <class>-list-p and <class>-child-p functions are declared obsolete.
264 *** The <class> variables are declared obsolete.
265 *** The <initarg> variables are declared obsolete.
266 *** defgeneric and defmethod are declared obsolete.
267 *** `constructor' is now an obsolete alias for `make-instance'.
270 *** New command `ido-bury-buffer-at-head' bound to C-S-b
271 Bury the buffer at the head of `ido-matches', analogous to how C-k
272 kills the buffer at head.
276 *** You can use <up> and <down> keys to move point in the multi-line
277 minibuffer just as in an ordinary buffer. Only when point moves over
278 the bottom/top of the minibuffer it goes to the next/previous history
279 element. The new commands bound to <up> and <down> in the minibuffer:
280 `next-line-or-history-element' and `previous-line-or-history-element'.
282 ** Search and Replace
284 *** Query-replace history is enhanced.
285 When query-replace reads the FROM string from the minibuffer, typing
286 `M-p' will now show previous replacements as "FROM SEP TO", where FROM
287 and TO are the original text and its replacement, and SEP is an arrow
288 string defined by the new variable `query-replace-from-to-separator'.
289 To select a prior replacement, type `M-p' until the desired
290 replacement appears in the minibuffer, and then exit the minibuffer by
295 *** If `quick-calc' is called with a prefix argument, insert the
296 result of the calculation into the current buffer.
299 *** New minor mode `global-eldoc-mode'
300 *** `eldoc-documentation-function' now defaults to `ignore'
301 *** `describe-char-eldoc' displays information about character at point,
302 and can be used as a default value of `eldoc-documentation-function'. It is
303 useful when, for example, one needs to distinguish various spaces (e.g. ] [,
304 ] [, ] [, etc.) while using mono-spaced font.
309 *** HTML can now be rendered using variable-width fonts.
312 *** A new command `F' (`eww-toggle-fonts') can be used to toggle
313 whether to use variable-pitch fonts or not. The user can also
314 customize the `shr-use-fonts' variable.
317 *** A new command `R' (`eww-readable') will try do identify the main
318 textual parts of a web page and display only that, leaving menus and
319 the like off the page.
322 *** You can now use several eww buffers in parallel by renaming eww
323 buffers you want to keep separate.
326 *** Partial state of the eww buffers (the URIs and the titles of the
327 pages visited) is now preserved in the desktop file.
330 *** `eww-after-render-hook' is now called after eww has rendered
331 the data in the buffer.
334 *** The `eww-reload' command now takes a prefix to not reload via
335 the net, but just use the local copy of the HTML.
338 *** The DOM shr and eww uses has been changed to the general Emacs
339 xml.el/libxml2 DOM, and a new package dom.el has been added to
340 interact with this DOM. See the Emacs Lisp manual for interface
344 *** `mailcap-mime-data' is now consulted when displaying PDF files.
347 *** The new `S' command will list all eww buffers, and allow managing
351 *** https pages with valid certificates have headers marked in green, while
352 invalid certificates are marked in red.
356 *** text/html messages that contain inline image parts will be
357 transformed into multipart/related messages before sending.
360 *** New UPatterns `quote' and `app'.
361 *** New UPatterns can be defined with `pcase-defmacro'.
363 *** New vector QPattern.
366 *** Strings after `:documentation' are highlighted as docstrings.
369 *** Rectangle Mark mode can have corners past EOL or in the middle of a TAB.
370 *** C-x C-x in rectangle-mark-mode now cycles through the four corners.
371 *** `string-rectangle' provides on-the-fly preview of the result.
373 ** New font-lock functions font-lock-ensure and font-lock-flush, which
374 should be used instead of font-lock-fontify-buffer when called from Elisp.
376 ** Macro `minibuffer-with-setup-hook' takes (:append FUN) to mean
377 appending FUN to `minibuffer-setup-hook'.
380 *** New functions cl-fresh-line, cl-digit-char-p and cl-parse-integer.
384 The seq library adds sequence manipulation functions and macros that
385 complement basic functions provided by subr.el. All functions are
386 prefixed with `seq-' and work on lists, strings and vectors.
388 ** Calendar and diary
391 *** New commands to insert diary entries with Chinese dates:
392 `diary-chinese-insert-anniversary-entry' `diary-chinese-insert-entry'
393 `diary-chinese-insert-monthly-entry', `diary-chinese-insert-yearly-entry'.
396 *** The calendar can now list and mark diary entries with Chinese dates.
397 See `diary-chinese-list-entries' and `diary-chinese-mark-entries'.
400 *** The option `calendar-mode-line-format' can now be nil,
401 which means to do nothing special with the mode line in calendars.
404 *** Many items obsolete since at least version 23.1 have been removed.
405 The majority were function/variable/face aliases, too numerous to list here.
408 **** Functions `calendar-one-frame-setup', `calendar-only-one-frame-setup',
409 `calendar-two-frame-setup', `european-calendar', `american-calendar'.
411 **** Hooks `cal-menu-load-hook', `cal-x-load-hook'.
413 **** Macro `calendar-for-loop'.
415 **** Variables `european-calendar-style', `diary-face', `hebrew-holidays-{1,4}'.
417 **** The nil and list forms of `diary-display-function'.
419 ** New ERT function `ert-summarize-tests-batch-and-exit'.
422 ** `Info-fontify-maximum-menu-size' can be t for no limit.
425 ** `info-display-manual' can now be given a prefix argument which (any
426 non-nil value) directs the command to limit the completion
427 alternatives to currently visited manuals.
430 ** ntlm.el has support for NTLM2.
433 ** The Rmail commands d, C-d and u now handle repeat counts to delete or
434 undelete multiple messages.
436 ** Rmail can now render HTML mail messages if your Emacs was built with
437 libxml2 or if you have the Lynx browser installed. By default, Rmail
438 will display the HTML version of a mail message that has both HTML and
439 plain text parts, if display of HTML email is possible; customize the
440 `rmail-mime-prefer-html' option to `nil' if you don't want that.
442 ** SES now supports local printer functions; see `ses-define-local-printer'.
444 ** In sh-mode, you can now use `sh-shell' as a file-local variable to
445 specify the type of shell in use (bash, csh, etc).
449 *** Fatal TLS errors are now silent by default.
453 *** The URL package accepts now the protocols "ssh", "scp" and "rsync".
454 When `url-handler-mode' is enabled, file operations for these
455 protocols as well as for "telnet" and "ftp" are passed to Tramp.
457 *** The URL package allows customizing the `url-user-agent' string.
458 The new `url-user-agent' variable can be customized to be a string or
461 *** The new interface variable `url-request-noninteractive' can be used
462 to specify that we're running in a noninteractive context, and that
463 we should not be queried about things like TLS certificate validity.
465 *** If URL is used with a https connection, the first callback argument
466 plist will contain a :peer element that has the output of
467 `gnutls-peer-status' (if Emacs is built with GnuTLS support).
471 *** New connection method "nc", which allows to access dumb busyboxes.
475 *** New user variable `sql-default-directory' enables remote
476 connections using Tramp.
478 *** New command `sql-send-line-and-next' sends the current line to the
479 interactive buffer and advances to the next line, skipping whitespace
482 *** Add support for Vertica SQL.
484 ** VC and related modes
486 *** The new command vc-region-history shows the log+diff of the active region.
488 *** New option `vc-annotate-background-mode' controls whether
489 the color range from `vc-annotate-color-map' is applied to the
490 background or to the foreground.
492 *** `compare-windows' now compares text with the most recently used window
493 instead of the next window. The new option `compare-windows-get-window-function'
494 allows to customize this.
496 *** Two new faces `compare-windows-removed' and `compare-windows-added'
497 replace the obsolete face `compare-windows'.
499 ** VHDL mode supports VHDL'08.
501 ** Calculator: decimal display mode uses "," groups, so it's more
502 fitting for use in money calculations; factorial works with
505 ** HideIfDef mode now support full C/C++ expressions, argumented macro expansions
506 , interactive macro evaluation and automatic scanning of #defined symbols.
508 *** New custom variable `hide-ifdef-header-regexp' to define C/C++ header file
509 name patterns. Default case-insensitive .h, .hh, .hpp and .hxx.
510 *** New custom variable `hide-ifdef-expand-reinclusion-protection' to prevent
511 reinclusion protected header files from being fully hidden.
512 *** New custom variable `hide-ifdef-exclude-define-regexp' to define symbol
513 name patterns (e.x. all "FOR_DOXYGEN_ONLY_*") to be excluded.
517 *** New custom variable `tex-print-file-extension' to help users who
518 use PDF instead of DVI.
520 ** whitespace-mode: new 'big-indent style highlighting too much indentation.
521 By default, 32 spaces and four TABs are considered to be too much but
522 `whitespace-big-indent-regexp' can be configured to change that.
524 ** tildify: `tildify-space-string', `tildify-pattern', and
525 `tildify-foreach-region-function' variables added making
526 `tildify-string-alist', `tildify-pattern-alist', and
527 `tildify-ignored-environments-alist' variables (as well as a few
528 helper functions) obsolete.
531 The new package provides generic framework and new commands to find
532 and move to definitions, as well as pop back to the original location.
535 `xref-find-definitions' replaces `find-tag' and provides an interface
536 to pick one destination among several. Hence, `tags-loop-continue' is
537 unbound. `xref-pop-marker-stack' replaces `pop-tag-mark', but uses an
538 easier binding, which is now unoccupied (`M-,').
539 `xref-find-definitions-other-window' replaces `find-tag-other-window'.
540 `xref-find-definitions-other-frame' replaces `find-tag-other-frame'.
541 `xref-find-apropos' replaces `find-tag-regexp'.
544 `find-tag-marker-ring-length' is now an obsolete alias for
545 `xref-marker-ring-length'. `find-tag-marker-ring' is now an obsolete
546 alias for a private variable. `xref-push-marker-stack' and
547 `xref-pop-marker-stack' should be used to mutate it instead.
550 As a result of the above, these commands are now obsolete:
551 `find-tag-other-window', `find-tag-other-frame', `find-tag-regexp',
552 `tags-apropos' and `tags-loop-continue'.
555 EUDC's LDAP backend has been improved.
557 *** EUDC supports LDAP-over-SSL URLs (ldaps://).
559 *** EUDC passes LDAP passwords through a pipe to the ldapsearch
560 subprocess instead of on the command line.
562 *** EUDC handles LDAP wildcards automatically so the user shouldn't
563 need to configure this manually anymore.
565 *** The LDAP configuration section of EUDC's manual has been
568 There have also been customization changes.
570 *** New custom variable `eudc-server-hotlist' to allow specifying
571 multiple EUDC servers in init file.
573 *** Custom variable `eudc-inline-query-format' defaults to completing
574 on email and firstname instead of surname.
576 *** Custom variable `eudc-expansion-overwrites-query' defaults to nil
577 to avoid interfering with the kill ring.
579 *** Custom variable `eudc-inline-expansion-format' defaults to
580 "Firstname Surname <mail-address>".
582 *** New custom variable `ldap-ldapsearch-password-prompt-regexp' to
583 allow overriding the regular expression that recognizes the ldapsearch
584 command line's password prompt.
587 ** tar-mode: new `tar-new-entry' command, allowing for new members to
588 be added to the archive.
590 ** Autorevert: dired buffers are also auto-reverted via file
591 notifications, if Emacs is compiled with file notification support.
599 * New Modes and Packages in Emacs 25.1
601 ** cl-generic.el provides CLOS-style multiple-dispatch generic functions.
603 ** scss-mode (a minor variant of css-mode)
605 ** let-alist is a new macro (and a package) that allows one to easily
606 let-bind the values stored in an alist.
608 ** `tildify-mode' allows to automatically insert hard spaces as one
609 types the text. Breaking line after a single-character words is
610 forbidden by Czech and Polish typography (and may be discouraged in
611 other languages), so `auto-tildify-mode' makes it easier to create
612 a typographically-correct documents.
614 * Incompatible Lisp Changes in Emacs 25.1
616 ** completion-table-dynamic stays in the minibuffer.
617 If you want the old behavior of calling the function in the buffer
618 from which the minibuffer was entered, call it with the new argument
621 ** window-configurations no longer record the buffers's marks.
623 ** inhibit-modification-hooks now also inhibits lock-file checks, as well as
624 active region handling.
626 ** deactivate-mark is now buffer-local.
628 ** `cl-the' now asserts that its argument is of the given type.
631 ** Mouse click events on mode line or header line no longer include
632 any reference to a buffer position. The 6th member of the mouse
633 position list returned for such events is now nil.
635 ** Menu items in keymaps do not support the "key shortcut cache" any more.
636 These slots used to hold key-shortcut data, but have been obsolete since
639 ** Emacs no longer downcases the first letter of a system diagnostic
640 when signaling a file error. For example, it now reports "Permission
641 denied" instead of "permission denied". The old behavior was problematic
642 in languages like German where downcasing rules depend on grammar.
645 ** The character classes [:alpha:] and [:alnum:] in regular expressions
646 now match multibyte characters using Unicode character properties.
647 If you want the old behavior where they matched any character with
648 word syntax, use `\sw' instead.
651 * Lisp Changes in Emacs 25.1
653 ** Emacs Lisp now supports generators.
655 ** New finalizer facility for running code when objects
658 ** lexical closures can use (:documentation <form>) to build their docstring.
659 It should be placed right where the docstring would be, and <form> is then
660 evaluated (and should return a string) when the closure is built.
662 ** define-inline provides a new way to define inlinable functions.
664 ** New function macroexpand-1 to perform a single step of macroexpansion.
666 ** Some "x-*" were obsoleted:
667 *** x-select-text is renamed gui-select-text.
668 *** x-selection-value is renamed gui-selection-value.
669 *** x-get-selection is renamed gui-get-selection.
670 *** x-get-clipboard and x-clipboard-yank are marked obsolete.
671 *** x-get-selection-value is renamed to gui-get-primary-selection.
672 *** x-set-selection is renamed to gui-set-selection
674 ** New function `alist-get', which is also a valid place (aka lvalue).
676 ** New function `funcall-interactively', which works like `funcall'
677 but makes `called-interactively-p' treat the function as (you guessed it)
678 called interactively.
680 ** New function `function-put' to use instead of `put' for function properties.
683 ** New properties that can be specified with `declare':
684 *** (interactive-only INSTEAD), says to use INSTEAD for non-interactive use.
685 *** (pure VAL), if VAL is non-nil, indicates the function is pure.
686 *** (side-effect-free VAL), if VAL is non-nil, indicates the function does not
690 ** New macro `with-file-modes', for evaluating expressions with default file
691 permissions set to temporary values (e.g., for creating private files).
693 ** You can access the slots of structures using `cl-struct-slot-value'.
695 ** Functions `rmail-delete-forward' and `rmail-delete-backward' take an
696 optional repeat-count argument.
698 ** Function `sort' can deal with vectors.
700 ** Function `system-name' now returns an updated value if the current
701 system's name has changed or if the Emacs process has changed systems,
702 and to avoid long waits it no longer consults DNS to canonicalize the
703 name. The variable `system-name' is now obsolete.
706 ** Function `write-region' no longer outputs "Wrote FILE" in batch mode.
709 ** New utilities in subr-x.el:
710 *** New macros `if-let' and `when-let' allow defining bindings and to
711 execute code depending whether all values are true.
712 *** New macros `thread-first' and `thread-last' allow threading a form
713 as the first or last argument of subsequent forms.
716 ** Time-related changes:
718 *** Time-related functions now consistently accept numbers
719 (representing seconds since the epoch) and nil (representing the
720 current time) as well as the usual list-of-integer representation.
721 Affected functions include `current-time-string', `current-time-zone',
722 `decode-time', `float-time', `format-time-string', `seconds-to-time',
723 `time-add', `time-less-p', `time-subtract', `time-to-day-in-year',
724 `time-to-days', and `time-to-seconds'.
726 *** The `encode-time-value' and `with-decoded-time-value' macros have
729 *** `calendar-next-time-zone-transition', `time-add', and
730 `time-subtract' no longer return time values in the obsolete and
731 undocumented integer-pair format. Instead, they return a list of two
735 ** New function `set-binary-mode' allows to switch a standard stream
736 of the Emacs process to binary I/O mode.
739 * Changes in Frames and Windows Code in Emacs 25.1
742 ** Emacs can now draw horizontal scroll bars on some platforms that
743 provide toolkit scroll bars, namely Gtk+, Lucid, Motif and Windows.
744 Horizontal scroll bars are turned off by default.
745 *** New function `horizontal-scroll-bars-available-p' telling whether
746 horizontal scroll bars are available on the underlying system.
747 *** New mode `horizontal-scroll-bar-mode' to toggle horizontal scroll
748 bars on all existing and future frames.
749 *** New function `toggle-horizontal-scroll-bar' to toggle horizontal
750 scroll bars on the selected frame.
751 *** New frame parameters `horizontal-scroll-bars' and
752 `scroll-bar-height' to set horizontal scroll bars and their height
753 for individual frames and in `default-frame-alist'.
754 *** New functions `frame-scroll-bar-height' and
755 `window-scroll-bar-height' return the height of horizontal scroll
756 bars on a specific frame or window.
757 *** `set-window-scroll-bars' now accepts five parameters where the last
758 two specify height and type of the window's horizontal scroll bar.
759 *** `window-scroll-bars' now returns type and sizes of horizontal scroll
761 *** New buffer-local variables `horizontal-scroll-bar' and
765 ** The height of a frame's menu and tool bar are no longer counted in the
766 frame's text height. This means that the text height stands only for
767 the height of the frame's root window plus that of the echo area (if
768 present). This was already the behavior for frames with external tool
769 and menu bars (like in the Gtk builds) but has now been extended to all
773 ** Frames now do not necessarily preserve the number of columns or lines
774 they display when setting default font, menu bar, fringe width, or
775 scroll bars. In particular, maximized and fullscreen frames are
776 conceptually never resized if such settings change. For fullheight and
777 fullwidth frames, the behavior may depend on the toolkit used.
778 *** New option `frame-inhibit-implied-resize' if non-nil, means that
779 setting default font, menu bar, fringe width, or scroll bars of a
780 specific frame does not resize that frame in order to preserve the
781 number of columns or lines it displays.
784 ** New function `window-preserve-size' allows to preserve the size of
785 windows without "fixing" it. It's supported by `fit-window-to-buffer',
786 `temp-buffer-resize-mode' and `display-buffer'.
788 ** Tearoff menus and detachable toolbars for Gtk+ has been removed.
789 Those features have been deprecated in Gtk+ for a long time.
792 * Changes in Emacs 25.1 on Non-Free Operating Systems
795 ** Building Emacs for MS-Windows requires at least Windows XP
796 or Windows Server 2003. The built binaries still run on all versions
797 of Windows starting with Windows 9X.
800 ** Emacs running on MS-Windows now supports the daemon mode.
802 ** OS X 10.5 or older is no longer supported.
804 ** OS X on PowerPC is no longer supported.
807 ----------------------------------------------------------------------
808 This file is part of GNU Emacs.
810 GNU Emacs is free software: you can redistribute it and/or modify
811 it under the terms of the GNU General Public License as published by
812 the Free Software Foundation, either version 3 of the License, or
813 (at your option) any later version.
815 GNU Emacs is distributed in the hope that it will be useful,
816 but WITHOUT ANY WARRANTY; without even the implied warranty of
817 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
818 GNU General Public License for more details.
820 You should have received a copy of the GNU General Public License
821 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
827 paragraph-separate: "[
\f]*$"