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
28 ** Building Emacs now requires C99 or later.
30 ** Building Emacs now requires GNU make, version 3.81 or later.
33 ** `call-process-shell-command' and `process-file-shell-command'
34 don't take "&rest args" any more.
36 ** By default, Emacs no longer works on IRIX. We expect that Emacs
37 users are not affected by this, as SGI stopped supporting IRIX in
38 December 2013. If you are affected, please send a bug report. You
39 should be able to work around the problem either by porting the Emacs
40 undumping code to GCC under IRIX, or by configuring --with-wide-int,
41 or by sticking with Emacs 24.4.
43 ** 'configure' now prefers gnustep-config when configuring GNUstep.
44 If gnustep-config is not available, the old heuristics are used.
50 ** The configure option `--with-pkg-config-prog' has been removed.
51 Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to.
53 ** The configure option '--enable-silent-rules' is now the default,
54 and silent rules are now quieter. To get the old behavior where
55 'make' chatters a lot, configure with '--disable-silent-rules' or
56 build with 'make V=1'.
59 ** The configure option '--with-gameuser' now allows to specify a
60 group instead of a user if its argument is prefixed by ':' (a colon).
61 This will cause the game score files in ${localstatedir}/games/emacs
62 to be owned by that group, and the helper program for updating them to
63 be installed setgid. The option now defaults to the 'games' group.
66 ** The `grep-changelog' script (and its manual page) are no longer included.
67 It has no particular connection to Emacs and has not changed in years,
68 so if you want to use it, you can always take a copy from an older Emacs.
71 * Startup Changes in Emacs 25.1
74 * Changes in Emacs 25.1
76 ** New command `comment-line' bound to `C-x C-;'.
78 ** New function `custom-prompt-customize-unsaved-options' checks for
79 unsaved customizations and prompts user to customize (if found).
82 ** Network security (TLS/SSL certificate validity and the like) is
83 added via the new Network Security Manager (NSM) and controlled via
84 the `network-security-level' variable.
86 ** C-h l now also lists the commands that were run.
89 ** The new M-s M-w key binding uses eww to search the web for the
92 ** M-x suggests shorthands and ignores obsolete commands for completion.
93 ** x-select-enable-clipboard is renamed select-enable-clipboard.
94 x-select-enable-primary and renamed select-enable-primary.
95 Additionally they both now apply to all systems (OSX, GNUstep, Windows, you
96 name it), with the proviso that on some systems (e.g. Windows)
97 select-enable-primary is ineffective since the system doesn't
98 have the equivalent of a primary selection.
101 ** terpri gets an optional arg ENSURE to conditionally output a newline.
104 ** New macro `define-advice'.
106 ** `insert-register' now leaves point after the inserted text
107 when called interactively. A prefix argument toggles this behavior.
109 ** New var `truncate-string-ellipsis' to choose how to indicate truncation.
112 ** The new variable `term-file-aliases' replaces some files from lisp/term.
113 The function `tty-run-terminal-initialization' consults this variable
114 when deciding what terminal-specific initialization code to run.
117 ** New variable `system-configuration-features', listing some of the
118 main features that Emacs was compiled with. This is mainly intended
119 for use in Emacs bug reports.
122 ** A password is now hidden also when typed in batch mode. Another
123 hiding character but the default `.' can be used by let-binding the
124 variable `read-hide-char'.
126 ** The new functions `string-collate-lessp' and `string-collate-equalp'
127 preserve the collation order as defined by the system's locale(1)
128 environment. For the time being this is implemented for modern POSIX
129 systems and for MS-Windows, for other systems they fall back to their
130 counterparts `string-lessp' and `string-equal'.
132 *** The ls-lisp package uses `string-collate-lessp' to sort file names.
133 If you want the old, locale-independent sorting, customize the new
134 option `ls-lisp-use-string-collate' to a nil value.
136 *** The MS-Windows specific variable `w32-collate-ignore-punctuation',
137 if set to a non-nil value, causes the above 2 functions to ignore
138 symbol and punctuation characters when collating strings. This
139 emulates the behavior of modern Posix platforms when the locale's
140 codeset is "UTF-8" (as in "en_US.UTF-8"). This is needed because
141 MS-Windows doesn't support UTF-8 as codeset in its locales.
144 ** The new function `bidi-find-overridden-directionality' allows to
145 find characters whose directionality was, perhaps maliciously,
146 overridden by directional override control characters. Lisp programs
147 can use this to detect potential phishing of URLs and other links that
148 exploits bidirectional display reordering.
151 ** The new function `buffer-substring-with-bidi-context' allows to
152 copy a portion of a buffer into a different location while preserving
153 the visual appearance both of the copied text and the text at
154 destination, even when the copied text includes mixed bidirectional
155 text and directional control characters.
157 ** New variable `ns-use-fullscreen-animation' controls animation for
158 non-native NS fullscreen. The default is nil. Set to t to enable
159 animation when entering and leaving fullscreen. For native OSX fullscreen
162 ** A new text property `inhibit-read-only' can be used in read-only
163 buffers to allow certain parts of the text to be writable.
165 ** A new function `directory-files-recursively' returns all matching
166 files (recursively) under a directory.
168 ** The new `directory-name-p' can be used to check whether a file
169 name (as returned from, for instance, `file-name-all-completions' is
170 a directory file name. It returns non-nil if the last character in
171 the name is a forward slash.
174 ** New variable `fast-but-imprecise-scrolling' inhibits
175 fontification during full screen scrolling operations, giving less
176 hesitant operation during auto-repeat of C-v, M-v at the cost of
177 possible inaccuracies in the end position.
179 ** The function `font-info' now returns more details about a font.
180 In particular, it now returns the average width of the font's
181 characters, which can be used for geometry-related calculations.
184 * Editing Changes in Emacs 25.1
186 ** Unicode names entered via C-x 8 RET now use substring completion by default.
188 ** New minor mode global-eldoc-mode is enabled by default.
190 ** Emacs now supports "bracketed paste mode" when running on a terminal
191 that supports it. This facility allows Emacs to understand pasted
192 chunks of text as strings to be inserted, instead of interpreting each
193 character in the pasted text as actual user input. This results in a
194 paste experience similar to that under a window system, and significant
195 performance improvements when pasting large amounts of text.
197 ** Emacs now supports the latest version of the UBA.
198 The Emacs implementation of the Unicode Bidirectional Algorithm (UBA)
199 was updated to support all the latest additions and changes introduced
200 in Unicode Standard versions 6.3 and 7.0, and a few changes suggested
201 for Unicode 8.0. This includes full support for directional isolates
202 and the Bidirectional Parentheses Algorithm (BPA) specified by these
205 ** You can access `mouse-buffer-menu' (C-down-mouse-1) using C-f10.
208 * Changes in Specialized Modes and Packages in Emacs 25.1
210 *** `package-install-from-buffer' and `package-install-file' work on directories.
211 This follows the same rules as installing from a .tar file, except the
212 -pkg file is optional.
214 *** Packages which are dependencies of other packages cannot be deleted.
215 The FORCE argument to `package-delete' overrides this.
217 *** New custom variable `package-selected-packages' tracks packages
218 which were installed by the user (as opposed to installed as
219 dependencies). This variable can also be manually customized.
221 *** New command `package-install-user-selected-packages' installs all
222 packages from `package-selected-packages' which are currently missing.
224 *** New command `package-autoremove' removes all packages which were
225 installed strictly as dependencies but are no longer needed.
229 When you invoke `shell' interactively, the *shell* buffer will now
230 display in a new window. However, you can customize this behavior via
231 the `display-buffer-alist' variable. For example, to get
232 the old behavior -- *shell* buffer displays in current window -- use
233 (add-to-list 'display-buffer-alist
234 '("^\\*shell\\*$" . (display-buffer-same-window))).
238 *** The `:protection' slot option is not obeyed any more.
239 *** The `newname' argument to constructors is optional&deprecated.
240 If you need your objects to be named, do it by inheriting from `eieio-named'.
241 *** The <class>-list-p and <class>-child-p functions are declared obsolete.
242 *** The <class> variables are declared obsolete.
243 *** The <initarg> variables are declared obsolete.
244 *** defgeneric and defmethod are declared obsolete.
245 *** `constructor' is now an obsolete alias for `make-instance'.
248 *** New command `ido-bury-buffer-at-head' bound to C-S-b
249 Bury the buffer at the head of `ido-matches', analogous to how C-k
250 kills the buffer at head.
254 *** You can use <up> and <down> keys to move point in the multi-line
255 minibuffer just as in an ordinary buffer. Only when point moves over
256 the bottom/top of the minibuffer it goes to the next/previous history
257 element. The new commands bound to <up> and <down> in the minibuffer:
258 `next-line-or-history-element' and `previous-line-or-history-element'.
260 ** Search and Replace
262 *** Query-replace history is enhanced.
263 When query-replace reads the FROM string from the minibuffer, typing
264 `M-p' will now show previous replacements as "FROM SEP TO", where FROM
265 and TO are the original text and its replacement, and SEP is an arrow
266 string defined by the new variable `query-replace-from-to-separator'.
267 To select a prior replacement, type `M-p' until the desired
268 replacement appears in the minibuffer, and then exit the minibuffer by
273 *** If `quick-calc' is called with a prefix argument, insert the
274 result of the calculation into the current buffer.
277 *** New minor mode `global-eldoc-mode'
278 *** `eldoc-documentation-function' now defaults to `ignore'
279 *** `describe-char-eldoc' displays information about character at point,
280 and can be used as a default value of `eldoc-documentation-function'. It is
281 useful when, for example, one needs to distinguish various spaces (e.g. ] [,
282 ] [, ] [, etc.) while using mono-spaced font.
287 *** HTML can now be rendered using variable-width fonts.
290 *** A new command `F' (`eww-toggle-fonts') can be used to toggle
291 whether to use variable-pitch fonts or not. The user can also
292 customize the `shr-use-fonts' variable.
295 *** A new command `R' (`eww-readable') will try do identify the main
296 textual parts of a web page and display only that, leaving menus and
297 the like off the page.
300 *** You can now use several eww buffers in parallel by renaming eww
301 buffers you want to keep separate.
304 *** Partial state of the eww buffers (the URIs and the titles of the
305 pages visited) is now preserved in the desktop file.
308 *** `eww-after-render-hook' is now called after eww has rendered
309 the data in the buffer.
312 *** The `eww-reload' command now takes a prefix to not reload via
313 the net, but just use the local copy of the HTML.
316 *** The DOM shr and eww uses has been changed to the general Emacs
317 xml.el/libxml2 DOM, and a new package dom.el has been added to
318 interact with this DOM. See the Emacs Lisp manual for interface
322 *** `mailcap-mime-data' is now consulted when displaying PDF files.
325 *** The new `S' command will list all eww buffers, and allow managing
329 *** https pages with valid certificates have headers marked in green, while
330 invalid certificates are marked in red.
334 *** text/html messages that contain inline image parts will be
335 transformed into multipart/related messages before sending.
338 *** New UPatterns `quote' and `app'.
339 *** New UPatterns can be defined with `pcase-defmacro'.
341 *** New vector QPattern.
344 *** Strings after `:documentation' are highlighted as docstrings.
347 *** Rectangle Mark mode can have corners past EOL or in the middle of a TAB.
348 *** C-x C-x in rectangle-mark-mode now cycles through the four corners.
349 *** `string-rectangle' provides on-the-fly preview of the result.
351 ** New font-lock functions font-lock-ensure and font-lock-flush, which
352 should be used instead of font-lock-fontify-buffer when called from Elisp.
354 ** Macro `minibuffer-with-setup-hook' takes (:append FUN) to mean
355 appending FUN to `minibuffer-setup-hook'.
358 *** New functions cl-fresh-line, cl-digit-char-p and cl-parse-integer.
362 The seq library adds sequence manipulation functions and macros that
363 complement basic functions provided by subr.el. All functions are
364 prefixed with `seq-' and work on lists, strings and vectors.
366 ** Calendar and diary
369 *** New commands to insert diary entries with Chinese dates:
370 `diary-chinese-insert-anniversary-entry' `diary-chinese-insert-entry'
371 `diary-chinese-insert-monthly-entry', `diary-chinese-insert-yearly-entry'.
374 *** The calendar can now list and mark diary entries with Chinese dates.
375 See `diary-chinese-list-entries' and `diary-chinese-mark-entries'.
378 *** The option `calendar-mode-line-format' can now be nil,
379 which means to do nothing special with the mode line in calendars.
382 *** Many items obsolete since at least version 23.1 have been removed.
383 The majority were function/variable/face aliases, too numerous to list here.
386 **** Functions `calendar-one-frame-setup', `calendar-only-one-frame-setup',
387 `calendar-two-frame-setup', `european-calendar', `american-calendar'.
389 **** Hooks `cal-menu-load-hook', `cal-x-load-hook'.
391 **** Macro `calendar-for-loop'.
393 **** Variables `european-calendar-style', `diary-face', `hebrew-holidays-{1,4}'.
395 **** The nil and list forms of `diary-display-function'.
397 ** New ERT function `ert-summarize-tests-batch-and-exit'.
400 ** `Info-fontify-maximum-menu-size' can be t for no limit.
403 ** `info-display-manual' can now be given a prefix argument which (any
404 non-nil value) directs the command to limit the completion
405 alternatives to currently visited manuals.
408 ** ntlm.el has support for NTLM2.
411 ** The Rmail commands d, C-d and u now handle repeat counts to delete or
412 undelete multiple messages.
414 ** Rmail can now render HTML mail messages if your Emacs was built with
415 libxml2 or if you have the Lynx browser installed. By default, Rmail
416 will display the HTML version of a mail message that has both HTML and
417 plain text parts, if display of HTML email is possible; customize the
418 `rmail-mime-prefer-html' option to `nil' if you don't want that.
420 ** SES now supports local printer functions; see `ses-define-local-printer'.
422 ** In sh-mode, you can now use `sh-shell' as a file-local variable to
423 specify the type of shell in use (bash, csh, etc).
427 *** Fatal TLS errors are now silent by default.
431 *** The URL package accepts now the protocols "ssh", "scp" and "rsync".
432 When `url-handler-mode' is enabled, file operations for these
433 protocols as well as for "telnet" and "ftp" are passed to Tramp.
435 *** The URL package allows customizing the `url-user-agent' string.
436 The new `url-user-agent' variable can be customized to be a string or
439 *** The new interface variable `url-request-noninteractive' can be used
440 to specify that we're running in a noninteractive context, and that
441 we should not be queried about things like TLS certificate validity.
443 *** If URL is used with a https connection, the first callback argument
444 plist will contain a :peer element that has the output of
445 `gnutls-peer-status' (if Emacs is built with GnuTLS support).
449 *** New connection method "nc", which allows to access dumb busyboxes.
453 *** New user variable `sql-default-directory' enables remote
454 connections using Tramp.
456 *** New command `sql-send-line-and-next' sends the current line to the
457 interactive buffer and advances to the next line, skipping whitespace
460 *** Add support for Vertica SQL.
462 ** VC and related modes
464 *** The new command vc-region-history shows the log+diff of the active region.
466 *** New option `vc-annotate-background-mode' controls whether
467 the color range from `vc-annotate-color-map' is applied to the
468 background or to the foreground.
470 *** `compare-windows' now compares text with the most recently used window
471 instead of the next window. The new option `compare-windows-get-window-function'
472 allows to customize this.
474 *** Two new faces `compare-windows-removed' and `compare-windows-added'
475 replace the obsolete face `compare-windows'.
477 ** VHDL mode supports VHDL'08.
479 ** Calculator: decimal display mode uses "," groups, so it's more
480 fitting for use in money calculations; factorial works with
483 ** HideIfDef mode now support full C/C++ expressions, argumented macro expansions
484 , interactive macro evaluation and automatic scanning of #defined symbols.
486 *** New custom variable `hide-ifdef-header-regexp' to define C/C++ header file
487 name patterns. Default case-insensitive .h, .hh, .hpp and .hxx.
488 *** New custom variable `hide-ifdef-expand-reinclusion-protection' to prevent
489 reinclusion protected header files from being fully hidden.
490 *** New custom variable `hide-ifdef-exclude-define-regexp' to define symbol
491 name patterns (e.x. all "FOR_DOXYGEN_ONLY_*") to be excluded.
495 *** New custom variable `tex-print-file-extension' to help users who
496 use PDF instead of DVI.
498 ** whitespace-mode: new 'big-indent style highlighting too much indentation.
499 By default, 32 spaces and four TABs are considered to be too much but
500 `whitespace-big-indent-regexp' can be configured to change that.
502 ** tildify: `tildify-space-string', `tildify-pattern', and
503 `tildify-foreach-region-function' variables added making
504 `tildify-string-alist', `tildify-pattern-alist', and
505 `tildify-ignored-environments-alist' variables (as well as a few
506 helper functions) obsolete.
509 The new package provides generic framework and new commands to find
510 and move to definitions, as well as pop back to the original location.
513 `xref-find-definitions' replaces `find-tag' and provides an interface
514 to pick one destination among several. Hence, `tags-loop-continue' is
515 unbound. `xref-pop-marker-stack' replaces `pop-tag-mark', but uses an
516 easier binding, which is now unoccupied (`M-,').
517 `xref-find-definitions-other-window' replaces `find-tag-other-window'.
518 `xref-find-definitions-other-frame' replaces `find-tag-other-frame'.
519 `xref-find-apropos' replaces `find-tag-regexp'.
522 `find-tag-marker-ring-length' is now an obsolete alias for
523 `xref-marker-ring-length'. `find-tag-marker-ring' is now an obsolete
524 alias for a private variable. `xref-push-marker-stack' and
525 `xref-pop-marker-stack' should be used to mutate it instead.
528 As a result of the above, these commands are now obsolete:
529 `find-tag-other-window', `find-tag-other-frame', `find-tag-regexp',
530 `tags-apropos' and `tags-loop-continue'.
533 EUDC's LDAP backend has been improved.
535 *** EUDC supports LDAP-over-SSL URLs (ldaps://).
537 *** EUDC passes LDAP passwords through a pipe to the ldapsearch
538 subprocess instead of on the command line.
540 *** EUDC handles LDAP wildcards automatically so the user shouldn't
541 need to configure this manually anymore.
543 *** The LDAP configuration section of EUDC's manual has been
546 There have also been customization changes.
548 *** New custom variable `eudc-server-hotlist' to allow specifying
549 multiple EUDC servers in init file.
551 *** Custom variable `eudc-inline-query-format' defaults to completing
552 on email and firstname instead of surname.
554 *** Custom variable `eudc-expansion-overwrites-query' defaults to nil
555 to avoid interfering with the kill ring.
557 *** Custom variable `eudc-inline-expansion-format' defaults to
558 "Firstname Surname <mail-address>".
560 *** New custom variable `ldap-ldapsearch-password-prompt-regexp' to
561 allow overriding the regular expression that recognizes the ldapsearch
562 command line's password prompt.
565 ** tar-mode: new `tar-new-entry' command, allowing for new members to
566 be added to the archive.
568 ** Autorevert: dired buffers are also auto-reverted via file
569 notifications, if Emacs is compiled with file notification support.
577 * New Modes and Packages in Emacs 25.1
579 ** cl-generic.el provides CLOS-style multiple-dispatch generic functions.
581 ** scss-mode (a minor variant of css-mode)
583 ** let-alist is a new macro (and a package) that allows one to easily
584 let-bind the values stored in an alist.
586 ** `tildify-mode' allows to automatically insert hard spaces as one
587 types the text. Breaking line after a single-character words is
588 forbidden by Czech and Polish typography (and may be discouraged in
589 other languages), so `auto-tildify-mode' makes it easier to create
590 a typographically-correct documents.
592 * Incompatible Lisp Changes in Emacs 25.1
594 ** completion-table-dynamic stays in the minibuffer.
595 If you want the old behavior of calling the function in the buffer
596 from which the minibuffer was entered, call it with the new argument
599 ** window-configurations no longer record the buffers's marks.
601 ** inhibit-modification-hooks now also inhibits lock-file checks, as well as
602 active region handling.
604 ** deactivate-mark is now buffer-local.
606 ** `cl-the' now asserts that its argument is of the given type.
609 ** Mouse click events on mode line or header line no longer include
610 any reference to a buffer position. The 6th member of the mouse
611 position list returned for such events is now nil.
613 ** Menu items in keymaps do not support the "key shortcut cache" any more.
614 These slots used to hold key-shortcut data, but have been obsolete since
617 ** Emacs no longer downcases the first letter of a system diagnostic
618 when signaling a file error. For example, it now reports "Permission
619 denied" instead of "permission denied". The old behavior was problematic
620 in languages like German where downcasing rules depend on grammar.
623 ** The character classes [:alpha:] and [:alnum:] in regular expressions
624 now match multibyte characters using Unicode character properties.
625 If you want the old behavior where they matched any character with
626 word syntax, use `\sw' instead.
629 * Lisp Changes in Emacs 25.1
631 ** Emacs Lisp now supports generators.
633 ** New finalizer facility for running code when objects
636 ** lexical closures can use (:documentation <form>) to build their docstring.
637 It should be placed right where the docstring would be, and <form> is then
638 evaluated (and should return a string) when the closure is built.
640 ** define-inline provides a new way to define inlinable functions.
642 ** New function macroexpand-1 to perform a single step of macroexpansion.
644 ** Some "x-*" were obsoleted:
645 *** x-select-text is renamed gui-select-text.
646 *** x-selection-value is renamed gui-selection-value.
647 *** x-get-selection is renamed gui-get-selection.
648 *** x-get-clipboard and x-clipboard-yank are marked obsolete.
649 *** x-get-selection-value is renamed to gui-get-primary-selection.
650 *** x-set-selection is renamed to gui-set-selection
652 ** New function `alist-get', which is also a valid place (aka lvalue).
654 ** New function `funcall-interactively', which works like `funcall'
655 but makes `called-interactively-p' treat the function as (you guessed it)
656 called interactively.
658 ** New function `function-put' to use instead of `put' for function properties.
661 ** New properties that can be specified with `declare':
662 *** (interactive-only INSTEAD), says to use INSTEAD for non-interactive use.
663 *** (pure VAL), if VAL is non-nil, indicates the function is pure.
664 *** (side-effect-free VAL), if VAL is non-nil, indicates the function does not
668 ** New macro `with-file-modes', for evaluating expressions with default file
669 permissions set to temporary values (e.g., for creating private files).
671 ** You can access the slots of structures using `cl-struct-slot-value'.
673 ** Functions `rmail-delete-forward' and `rmail-delete-backward' take an
674 optional repeat-count argument.
676 ** Function `sort' can deal with vectors.
678 ** Function `system-name' now returns an updated value if the current
679 system's name has changed or if the Emacs process has changed systems,
680 and to avoid long waits it no longer consults DNS to canonicalize the
681 name. The variable `system-name' is now obsolete.
684 ** Function `write-region' no longer outputs "Wrote FILE" in batch mode.
687 ** New utilities in subr-x.el:
688 *** New macros `if-let' and `when-let' allow defining bindings and to
689 execute code depending whether all values are true.
690 *** New macros `thread-first' and `thread-last' allow threading a form
691 as the first or last argument of subsequent forms.
694 ** Time-related changes:
696 *** Time-related functions now consistently accept numbers
697 (representing seconds since the epoch) and nil (representing the
698 current time) as well as the usual list-of-integer representation.
699 Affected functions include `current-time-string', `current-time-zone',
700 `decode-time', `float-time', `format-time-string', `seconds-to-time',
701 `time-add', `time-less-p', `time-subtract', `time-to-day-in-year',
702 `time-to-days', and `time-to-seconds'.
704 *** The `encode-time-value' and `with-decoded-time-value' macros have
707 *** `calendar-next-time-zone-transition', `time-add', and
708 `time-subtract' no longer return time values in the obsolete and
709 undocumented integer-pair format. Instead, they return a list of two
713 ** New function `set-binary-mode' allows to switch a standard stream
714 of the Emacs process to binary I/O mode.
717 * Changes in Frames and Windows Code in Emacs 25.1
720 ** Emacs can now draw horizontal scroll bars on some platforms that
721 provide toolkit scroll bars, namely Gtk+, Lucid, Motif and Windows.
722 Horizontal scroll bars are turned off by default.
723 *** New function `horizontal-scroll-bars-available-p' telling whether
724 horizontal scroll bars are available on the underlying system.
725 *** New mode `horizontal-scroll-bar-mode' to toggle horizontal scroll
726 bars on all existing and future frames.
727 *** New function `toggle-horizontal-scroll-bar' to toggle horizontal
728 scroll bars on the selected frame.
729 *** New frame parameters `horizontal-scroll-bars' and
730 `scroll-bar-height' to set horizontal scroll bars and their height
731 for individual frames and in `default-frame-alist'.
732 *** New functions `frame-scroll-bar-height' and
733 `window-scroll-bar-height' return the height of horizontal scroll
734 bars on a specific frame or window.
735 *** `set-window-scroll-bars' now accepts five parameters where the last
736 two specify height and type of the window's horizontal scroll bar.
737 *** `window-scroll-bars' now returns type and sizes of horizontal scroll
739 *** New buffer-local variables `horizontal-scroll-bar' and
743 ** The height of a frame's menu and tool bar are no longer counted in the
744 frame's text height. This means that the text height stands only for
745 the height of the frame's root window plus that of the echo area (if
746 present). This was already the behavior for frames with external tool
747 and menu bars (like in the Gtk builds) but has now been extended to all
751 ** Frames now do not necessarily preserve the number of columns or lines
752 they display when setting default font, menu bar, fringe width, or
753 scroll bars. In particular, maximized and fullscreen frames are
754 conceptually never resized if such settings change. For fullheight and
755 fullwidth frames, the behavior may depend on the toolkit used.
756 *** New option `frame-inhibit-implied-resize' if non-nil, means that
757 setting default font, menu bar, fringe width, or scroll bars of a
758 specific frame does not resize that frame in order to preserve the
759 number of columns or lines it displays.
762 ** New function `window-preserve-size' allows to preserve the size of
763 windows without "fixing" it. It's supported by `fit-window-to-buffer',
764 `temp-buffer-resize-mode' and `display-buffer'.
766 ** Tearoff menus and detachable toolbars for Gtk+ has been removed.
767 Those features have been deprecated in Gtk+ for a long time.
770 * Changes in Emacs 25.1 on Non-Free Operating Systems
773 ** Building Emacs for MS-Windows requires at least Windows XP
774 or Windows Server 2003. The built binaries still run on all versions
775 of Windows starting with Windows 9X.
778 ** Emacs running on MS-Windows now supports the daemon mode.
780 ** OS X 10.5 or older is no longer supported.
782 ** OS X on PowerPC is no longer supported.
785 ----------------------------------------------------------------------
786 This file is part of GNU Emacs.
788 GNU Emacs is free software: you can redistribute it and/or modify
789 it under the terms of the GNU General Public License as published by
790 the Free Software Foundation, either version 3 of the License, or
791 (at your option) any later version.
793 GNU Emacs is distributed in the hope that it will be useful,
794 but WITHOUT ANY WARRANTY; without even the implied warranty of
795 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
796 GNU General Public License for more details.
798 You should have received a copy of the GNU General Public License
799 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
805 paragraph-separate: "[
\f]*$"