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 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 25.1
29 ** Building Emacs now requires C99 or later.
32 ** Building Emacs now requires GNU make, version 3.81 or later.
35 ** New configure option --with-cairo.
36 This builds Emacs with Cairo drawing. As a side effect, it provides
37 support for built-in printing, when Emacs was built with GTK+.
39 ** New configure option --with-modules.
40 This enables support for loading dynamic modules; see below.
43 ** By default, Emacs no longer works on IRIX. We expect that Emacs
44 users are not affected by this, as SGI stopped supporting IRIX in
45 December 2013. If you are affected, please send a bug report. You
46 should be able to work around the problem either by porting the Emacs
47 undumping code to GCC under IRIX, or by configuring --with-wide-int,
48 or by sticking with Emacs 24.4.
51 ** The Emacs garbage collector assumes GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS.
52 The GC_MAKE_GCPROS_NOOPS stack-marking variant has been the default
53 since Emacs 24.4, and the other variants were undocumented and were
54 obstacles to maintenance and development. GC_MARK_STACK and its
55 related symbols have been removed from the C internals.
58 ** 'configure' now prefers gnustep-config when configuring GNUstep.
59 If gnustep-config is not available, the old heuristics are used.
62 ** 'configure' now prefers inotify to gfile for file notification,
63 unless gfile is explicitly requested via --with-file-notification='gfile'.
66 ** The configure option '--with-pkg-config-prog' has been removed.
67 Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to.
70 ** The configure option '--with-mmdf' has been removed.
71 It was no longer useful, as it relied on libraries that are no longer
72 supported, and its presence led to confusion during configuration.
73 This affects only the 'movemail' utility; Emacs itself can still
74 process MMDF-format files as before.
77 ** The configure option '--enable-silent-rules' is now the default,
78 and silent rules are now quieter. To get the old behavior where
79 'make' chatters a lot, configure with '--disable-silent-rules' or
80 build with 'make V=1'.
83 ** The configure option '--with-gameuser' now allows to specify a
84 group instead of a user if its argument is prefixed by ':' (a colon).
85 This will cause the game score files in ${localstatedir}/games/emacs
86 to be owned by that group, and the helper program for updating them to
87 be installed setgid. The option now defaults to the 'games' group.
90 ** The `grep-changelog' script (and its manual page) are no longer included.
91 It has no particular connection to Emacs and has not changed in years,
92 so if you want to use it, you can always take a copy from an older Emacs.
95 ** Emacs 25 comes with a new set of icons.
96 Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png.
97 The old Emacs logo icons are available as `emacs23.png' in the same location.
100 * Startup Changes in Emacs 25.1
103 ** When Emacs is given a file as a command line argument and
104 `initial-buffer-choice' is non-nil, display both the file and
105 `initial-buffer-choice'. When Emacs is given more than one file and
106 `initial-buffer-choice' is non-nil, show `initial-buffer-choice'
107 and *Buffer List*. This makes Emacs convenient to use from the
108 command line when `initial-buffer-choice' is non-nil.
111 ** The value of ‘initial-scratch-message’ is now treated as a doc string
112 and can contain escape sequences for command keys, quotes, and the like.
115 * Changes in Emacs 25.1
117 ** Emacs can now load shared/dynamic libraries (modules).
118 A dynamic Emacs module is a shared library that provides additional
119 functionality for use in Emacs Lisp programs, just like a package
120 written in Emacs Lisp would. The functions `load', `require',
121 `load-file', etc. were extended to load such modules, as they do with
122 Emacs Lisp packages. The new variable `module-file-suffix' holds the
123 system-dependent value of the file-name extension (`.so' on Posix
124 hosts) of the module files.
126 A module should export a C-callable function named
127 `emacs_module_init', which Emacs will call as part of the call to
128 `load' or `require' which loads the module. It should also export a
129 symbol named `plugin_is_GPL_compatible' to indicate that its code is
130 released under the GPL or compatible license; Emacs will refuse to
131 load modules that don't export such a symbol.
133 If a module needs to call Emacs functions, it should do so through the
134 API defined and documented in the header file `emacs-module.h'. Note
135 that any module that provides Lisp-callable functions will have to use
136 Emacs functions such as `fset' and `funcall', in order to register its
137 functions with the Emacs Lisp interpreter.
139 Modules can create `user-ptr' Lisp objects that embed pointers to C
140 struct's defined by the module. This is useful for keeping around
141 complex data structures created by a module, to be passed back to the
142 module's functions. User-ptr objects can also have associated
143 "finalizers" -- functions to be run when the object is GC'ed; this is
144 useful for freeing any resources allocated for the underlying data
145 structure, such as memory, open file descriptors, etc. A new
146 predicate `user-ptrp' returns non-nil if its argument is a `user-ptr'
149 Loadable modules in Emacs are an experimental feature, and subject to
150 change in future releases. For that reason, their support is disabled
151 by default, and must be enabled by using the `--with-modules' option
155 ** Any file of the form .dir-locals*.el is now considered a dir-local
156 file, and multiple such files can be used in the same directory. See
157 the variable `dir-locals-file' for more information.
160 ** Network security (TLS/SSL certificate validity and the like) is
161 added via the new Network Security Manager (NSM) and controlled via
162 the `network-security-level' variable.
165 ** C-h l now also lists the commands that were run.
168 ** x-select-enable-clipboard is renamed select-enable-clipboard
169 and x-select-enable-primary is renamed select-enable-primary.
170 Additionally they both now apply to all systems (OSX, GNUstep, Windows, you
171 name it), with the proviso that on some systems (e.g. Windows)
172 select-enable-primary is ineffective since the system doesn't
173 have the equivalent of a primary selection.
176 ** New option `switch-to-buffer-in-dedicated-window' allows to customize
177 how `switch-to-buffer' proceeds interactively when the selected window
178 is strongly dedicated to its buffer.
181 ** The option `even-window-heights' has been renamed to
182 `even-window-sizes' and now handles window widths as well.
185 ** terpri gets an optional arg ENSURE to conditionally output a newline.
188 ** `insert-register' now leaves point after the inserted text
189 when called interactively. A prefix argument toggles this behavior.
192 ** The new variable `term-file-aliases' replaces some files from lisp/term.
193 The function `tty-run-terminal-initialization' consults this variable
194 when deciding what terminal-specific initialization code to run.
197 ** New variable `system-configuration-features', listing some of the
198 main features that Emacs was compiled with. This is mainly intended
199 for use in Emacs bug reports.
202 ** A password is now hidden also when typed in batch mode. Another
203 hiding character but the default `.' can be used by let-binding the
204 variable `read-hide-char'.
207 ** New input method: `tamil-dvorak'.
210 * Editing Changes in Emacs 25.1
213 ** M-x suggests shorthands and ignores obsolete commands for completion.
218 *** Successive single-char deletions are collapsed in the undo-log just like
219 successive char insertions. Which commands invoke this behavior is
220 controlled by the new `undo-auto-amalgamate' function. See the node
221 "Undo" in the ELisp manual for more details.
224 *** The heuristic used to insert `undo-boundary' after each command
225 has changed, so that if a command causes changes in more than just the
226 current buffer, Emacs now calls `undo-boundary' in every buffer
227 affected by the command.
230 ** New command `comment-line' bound to `C-x C-;'.
232 ** New and improved facilities for inserting Unicode characters
235 *** Unicode names entered via C-x 8 RET now use substring completion by default.
238 *** C-x 8 now has shorthands for these chars: ‐ ‑ ‒ – — ― ‘ ’ “ ” † ‡ • ′ ″
239 € № ← → ↔ − ≈ ≠ ≤ ≥. As before, you can type C-x 8 C-h to list shorthands.
242 *** New minor mode electric-quote-mode for quoting ‘like this’ and “like this”
243 as you type. See also the new variable ‘text-quoting-style’.
246 ** New minor mode global-eldoc-mode is enabled by default.
249 ** Emacs now supports "bracketed paste mode" when running on a terminal
250 that supports it. This facility allows Emacs to understand pasted
251 chunks of text as strings to be inserted, instead of interpreting each
252 character in the pasted text as actual user input. This results in a
253 paste experience similar to that under a window system, and significant
254 performance improvements when pasting large amounts of text.
257 ** Emacs now supports the latest version of the UBA.
258 The Emacs implementation of the Unicode Bidirectional Algorithm (UBA)
259 was updated to support all the latest additions and changes introduced
260 in Unicode Standard versions 6.3, 7.0, and the latest Unicode 8.0.
261 This includes full support for directional isolates and the
262 Bidirectional Parentheses Algorithm (BPA) specified by these Unicode
266 ** You can access `mouse-buffer-menu' (C-down-mouse-1) using C-f10.
269 ** New buffer-local `electric-pair-local-mode'.
272 ** New variable `fast-but-imprecise-scrolling' inhibits
273 fontification during full screen scrolling operations, giving less
274 hesitant operation during auto-repeat of C-v, M-v at the cost of
275 possible inaccuracies in the end position.
278 ** New documentation command `describe-symbol'.
279 Works for functions, variables, faces, etc. It is bound to `C-h o' by
283 ** New function `custom-prompt-customize-unsaved-options' checks for
284 unsaved customizations and prompts user to customize (if found). It
285 is intended for adding to 'kill-emacs-query-functions'.
288 * Changes in Specialized Modes and Packages in Emacs 25.1
293 *** New command `checkdoc-package-keywords' checks if the
294 current package keywords are recognized. Set the new option
295 `checkdoc-package-keywords-flag' to non-nil to make
296 `checkdoc-current-buffer' call this function automatically.
299 *** New function `checkdoc-file' checks for style errors.
300 It's meant for use together with `compile':
301 emacs -batch --eval "(checkdoc-file \"subr.el\")"
304 ** New function `bookmark-set-no-overwrite' bound to C-x r M.
305 It raises an error if a bookmark of that name already exists,
306 unlike `bookmark-set' which silently updates an existing bookmark.
311 *** `json-pretty-print' and `json-pretty-print-buffer' now maintain
312 the ordering of object keys by default.
315 *** New commands `json-pretty-print-ordered' and
316 `json-pretty-print-buffer-ordered' pretty prints JSON objects with
317 object keys sorted alphabetically.
320 ** Prog mode has some support for multi-mode indentation.
321 This allows better indentation support in modes that support multiple
322 programming languages in the same buffer, like literate programming
323 environments or ANTLR programs with embedded Python code.
325 A major mode can provide indentation context for a sub-mode through
326 the `prog-indentation-context' variable. To support this, modes that
327 provide indentation should use `prog-widen' instead of `widen' and
328 `prog-first-column' instead of a literal zero. See the node
329 "Mode-Specific Indent" in the ELisp manual for more details.
331 ** Prettify Symbols mode
334 *** Prettify Symbols mode supports custom composition predicates. By
335 overriding the default `prettify-symbols-compose-predicate', modes can
336 specify in which contexts a symbol may be displayed as some Unicode
337 character. `prettify-symbols-default-compose-p' is the default which
338 is suitable for most programming languages such as C or Lisp (but not
342 *** Symbols can be unprettified while point is inside them.
343 New variable `prettify-symbols-unprettify-at-point' configures this.
345 ** Enhanced xterm support
348 *** The new variable `xterm-screen-extra-capabilities' for configuring xterm.
349 This variable tells Emacs which advanced capabilities are available in
350 the xterm terminal emulator used to display Emacs text-mode frames.
351 The default is to check each capability, and use it if available.
352 (This variable was introduced in Emacs 24.1, but was not announced in
356 *** Killing text now also sets the CLIPBOARD/PRIMARY selection
357 in the surrounding GUI (using the OSC-52 escape sequence). This only works
358 if your xterm supports it and enables the `allowWindowOps' options (disabled
359 by default at least in Debian, for security reasons).
361 Similarly, you can yank the CLIPBOARD/PRIMARY selection (using the OSC-52
362 escape sequence) if your xterm has the feature enabled but for that you
363 additionally need to add `getSelection' to `xterm-extra-capabilities'.
366 *** `xterm-mouse-mode' now supports mouse-tracking (if your xterm supports it).
369 ** The `save-place' variable is replaced by `save-place-mode'.
374 *** ERC can now hide message types by network or channel.
375 `erc-hide-list' will hide all messages of the specified type, while
376 `erc-network-hide-list' and `erc-channel-hide-list' will only hide the
377 specified message types for the respective specified targets.
382 *** `midnight-mode' is now a proper minor mode.
385 *** clean-buffer-*-regexps can now specify buffers via predicate functions.
390 *** New "external" package status.
391 An external package is any installed package that's not built-in and
392 not from `package-user-dir', which usually means it's from an entry in
393 `package-directory-list'. They are treated much like built-in
394 packages, in that they cannot be deleted through the package menu and
395 are not considered for upgrades.
397 The effect is that a user can manually place a specific version of a
398 package inside `package-directory-list' and the package menu will
402 *** If a package is available on multiple archives and one has higher
403 priority (as per `package-archive-priorities') only that one is
404 listed. This can be configured with `package-menu-hide-low-priority'.
407 *** `package-menu-toggle-hiding' now toggles the hiding of packages.
408 This includes the above-mentioned low-priority packages, as well as
409 available packages whose version is lower than the currently installed
410 version (which were previously impossible to display).
411 This allows users to downgrade a package if a lower version is
415 *** When filtering the package menu, keywords starting with "arc:" or
416 "status:" represent package archive or status, respectively, instead
420 *** Most functions which involve downloading information now take an
421 ASYNC argument. If it is non-nil, package.el performs the download(s)
425 *** New variable `package-menu-async' controls whether the
426 package-menu uses asynchronous downloads.
429 *** `package-install-from-buffer' and `package-install-file' work on directories.
430 This follows the same rules as installing from a .tar file, except the
431 -pkg file is optional.
434 *** Packages which are dependencies of other packages cannot be deleted.
435 The FORCE argument to `package-delete' overrides this.
438 *** New custom variable `package-selected-packages' tracks packages
439 which were installed by the user (as opposed to installed as
440 dependencies). This variable can also be manually customized.
443 *** New command `package-install-user-selected-packages' installs all
444 packages from `package-selected-packages' which are currently missing.
447 *** New command `package-autoremove' removes all packages which were
448 installed strictly as dependencies but are no longer needed.
453 When you invoke `shell' interactively, the *shell* buffer will now
454 display in a new window. However, you can customize this behavior via
455 the `display-buffer-alist' variable. For example, to get
456 the old behavior -- *shell* buffer displays in current window -- use
457 (add-to-list 'display-buffer-alist
458 '("^\\*shell\\*$" . (display-buffer-same-window))).
462 *** The `:protection' slot option is not obeyed any more.
464 *** The `newname' argument to constructors is optional&deprecated.
465 If you need your objects to be named, do it by inheriting from `eieio-named'.
467 *** The <class>-list-p and <class>-child-p functions are declared obsolete.
469 *** The <class> variables are declared obsolete.
471 *** The <initarg> variables are declared obsolete.
472 *** defgeneric and defmethod are declared obsolete.
474 *** `constructor' is now an obsolete alias for `make-instance'.
479 *** New command `ido-bury-buffer-at-head' bound to C-S-b
480 Bury the buffer at the head of `ido-matches', analogous to how C-k
481 kills the buffer at head.
484 *** A prefix argument to `ido-restrict-to-matches' will reverse its
485 meaning, and the list is restricted to those elements that do not
486 match the current input.
491 *** You can use <UP> and <DOWN> arrow keys to move through history by lines.
492 The new commands `next-line-or-history-element' and
493 `previous-line-or-history-element', bound to <UP> and <DOWN> in the
494 minibuffer, allow by-line movement through minibuffer history,
495 similarly to an ordinary buffer. Only when point moves over
496 the bottom/top of the minibuffer it goes to the next/previous history
497 element. `M-p' and `M-n' still move directly to previous/next history
500 ** Search and Replace
503 *** New user option `search-default-regexp-mode'
504 specifies the default mode for I-search.
507 *** `isearch' and `query-replace' can now perform character folding in matches.
508 Isearch does that by default, while `query-replace' will do that if
509 the new variable `replace-character-fold' is customized to a non-nil
510 value. This is analogous to case folding, but instead of disregarding
511 case variants, it disregards wider classes of distinctions between
512 similar characters. (Case folding is a special case of character
513 folding.) This means many characters in the search string will match
514 entire groups of characters instead of just themselves.
516 For instance, the " will match all variants of double quotes (like “
517 and ”), and the letter a will match all of its accented cousins, even
518 those composed of multiple characters, as well as many other symbols
522 *** New function `character-fold-to-regexp' can be used
523 by searching commands to produce a regexp matching anything that
524 character-folds into STRING.
527 *** The new M-s M-w key binding uses eww to search the web for the
528 text in the region. The search engine to use for this is specified by
529 the customizable variable `eww-search-prefix'.
532 *** Query-replace history is enhanced.
533 When query-replace reads the FROM string from the minibuffer, typing
534 `M-p' will now show previous replacements as "FROM SEP TO", where FROM
535 and TO are the original text and its replacement, and SEP is an arrow
536 string defined by the new variable `query-replace-from-to-separator'.
537 To select a prior replacement, type `M-p' until the desired
538 replacement appears in the minibuffer, and then exit the minibuffer by
543 *** If `quick-calc' is called with a prefix argument, insert the
544 result of the calculation into the current buffer.
547 ** In Edebug, you can now set the initial mode with C-x C-a C-m. With
548 this you can tell Edebug not to stop at the start of the first
549 instrumented function.
554 *** New minor mode `global-eldoc-mode'
555 It is turned on by default, and affects `*scratch*' and other buffers
556 whose major mode supports Emacs Lisp.
559 *** `eldoc-documentation-function' now defaults to `ignore'
562 *** `describe-char-eldoc' displays information about character at point,
563 and can be used as a default value of `eldoc-documentation-function'. It is
564 useful when, for example, one needs to distinguish various spaces (e.g. ] [,
565 ] [, ] [, etc.) while using mono-spaced font.
570 *** HTML can now be rendered using variable-width fonts.
573 *** A new command `F' (`eww-toggle-fonts') can be used to toggle
574 whether to use variable-pitch fonts or not. The user can also
575 customize the `shr-use-fonts' variable.
578 *** A new command `R' (`eww-readable') will try do identify the main
579 textual parts of a web page and display only that, leaving menus and
580 the like off the page.
583 *** You can now use several eww buffers in parallel by renaming eww
584 buffers you want to keep separate.
587 *** Partial state of the eww buffers (the URIs and the titles of the
588 pages visited) is now preserved in the desktop file.
591 *** `eww-after-render-hook' is now called after eww has rendered
592 the data in the buffer.
595 *** The `eww-reload' command now takes a prefix to not reload via
596 the net, but just use the local copy of the HTML.
599 *** The DOM shr and eww uses has been changed to the general Emacs
600 xml.el/libxml2 DOM, and a new package dom.el has been added to
601 interact with this DOM. See the Emacs Lisp manual for interface
605 *** `mailcap-mime-data' is now consulted when displaying PDF files.
608 *** The new `S' command will list all eww buffers, and allow managing
612 *** https pages with valid certificates have headers marked in green, while
613 invalid certificates are marked in red.
618 *** text/html messages that contain inline image parts will be
619 transformed into multipart/related messages before sending.
622 ** In Show Paren Mode, a parenthesis can be highlighted when point
623 stands inside it, and certain parens can be highlighted when point is
624 at BOL or EOL, or in whitespace there. To enable these, customize,
625 respectively, `show-paren-when-point-inside-paren' or
626 `show-paren-when-point-in-periphery'.
629 *** Strings after `:documentation' are highlighted as docstrings.
634 *** Rectangle Mark mode can have corners past EOL or in the middle of a TAB.
637 *** C-x C-x in rectangle-mark-mode now cycles through the four corners.
638 *** `string-rectangle' provides on-the-fly preview of the result.
641 ** New font-lock functions `font-lock-ensure' and `font-lock-flush'.
642 These should be used in preference to `font-lock-fontify-buffer' when
646 ** Macro `minibuffer-with-setup-hook' can optionally append a function
647 to `minibuffer-setup-hook'.
649 If the first argument of the macro is of the form `(:append FUN)',
650 then FUN will be appended to `minibuffer-setup-hook', instead of
655 *** New functions `cl-fresh-line', `cl-digit-char-p', and `cl-parse-integer'.
657 ** Calendar and diary
660 *** The default `diary-file' is now located in .emacs.d.
663 *** New commands to insert diary entries with Chinese dates:
664 `diary-chinese-insert-anniversary-entry' `diary-chinese-insert-entry'
665 `diary-chinese-insert-monthly-entry', `diary-chinese-insert-yearly-entry'.
668 *** The calendar can now list and mark diary entries with Chinese dates.
669 See `diary-chinese-list-entries' and `diary-chinese-mark-entries'.
672 *** The option `calendar-mode-line-format' can now be nil,
673 which means to do nothing special with the mode line in calendars.
676 *** New option `calendar-weekend-days'.
677 The option customizes which day headers receive the
678 `calendar-weekend-header' face.
681 *** New optional args N and STRING for ‘holiday-greek-orthodox-easter’.
684 *** Many items obsolete since at least version 23.1 have been removed.
685 The majority were function/variable/face aliases, too numerous to list here.
688 **** Functions `calendar-one-frame-setup', `calendar-only-one-frame-setup',
689 `calendar-two-frame-setup', `european-calendar', `american-calendar'.
691 **** Hooks `cal-menu-load-hook', `cal-x-load-hook'.
693 **** Macro `calendar-for-loop'.
695 **** Variables `european-calendar-style', `diary-face', `hebrew-holidays-{1,4}'.
697 **** The nil and list forms of `diary-display-function'.
700 ** New ERT function `ert-summarize-tests-batch-and-exit'.
701 If the output of ERT tests in batch mode execution can be saved to a
702 log file, then it can be passed as an argument to the above function
703 to produce a neat summary.
705 ** New js.el option `js-indent-first-init'.
710 ** Info mode now displays symbol names in fixed-pitch font.
711 If you want to get the old behavior back, customize the `Info-quoted'
712 face to use the same definitions as the default face.
715 *** `Info-fontify-maximum-menu-size' can be t for no limit.
718 *** `info-display-manual' can now be given a prefix argument which (any
719 non-nil value) directs the command to limit the completion
720 alternatives to currently visited manuals.
723 ** ntlm.el has support for NTLM2.
728 *** The Rmail commands `d', `C-d' and `u' take optional repeat counts
729 to delete or undelete multiple messages.
732 *** Rmail can now render HTML mail messages if your Emacs was built with
733 libxml2 or if you have the Lynx browser installed. By default, Rmail
734 will display the HTML version of a mail message that has both HTML and
735 plain text parts, if display of HTML email is possible; customize the
736 `rmail-mime-prefer-html' option to `nil' if you don't want that.
739 *** In the commands that make summaries by subject, recipients, or senders,
740 you can no longer use commas to separate regular expressions.
743 ** SES now supports local printer functions; see `ses-define-local-printer'.
747 *** In sh-mode you can now use `sh-shell' as a file-local variable to
748 specify the type of shell in use (bash, csh, etc).
751 *** New value `always' for `sh-indent-after-continuation'.
752 This provides old-style ("dumb") indentation of continued lines.
753 See the doc string of `sh-indent-after-continuation' for details.
757 *** Fatal TLS errors are now silent by default.
762 *** The URL package accepts now the protocols "ssh", "scp" and "rsync".
763 When `url-handler-mode' is enabled, file operations for these
764 protocols as well as for "telnet" and "ftp" are passed to Tramp.
767 *** The URL package allows customizing the `url-user-agent' string.
768 The new `url-user-agent' variable can be customized to be a string or
772 *** The new interface variable `url-request-noninteractive' can be used
773 to specify that we're running in a noninteractive context, and that
774 we should not be queried about things like TLS certificate validity.
777 *** If URL is used with a https connection, the first callback argument
778 plist will contain a :peer element that has the output of
779 `gnutls-peer-status' (if Emacs is built with GnuTLS support).
784 *** New connection method "afp", which allows to access Mac OS X
785 volumes via the Apple Filing Protocol.
788 *** New connection method "nc", which allows to access dumb busyboxes.
791 *** Method-specific parameters can be overwritten now with variable
792 `tramp-connection-properties'.
795 *** Handler for `file-notify-valid-p' for remote machines that support
796 filesystem notifications.
801 *** New user variable `sql-default-directory' enables remote
802 connections using Tramp.
805 *** New command `sql-send-line-and-next'.
806 This command, bound to `C-c C-n' by default, sends the current line to
807 the SQL process and advances to the next line, skipping whitespace and
811 *** Added support for Vertica SQL.
813 ** VC and related modes
816 *** Basic push support, via `vc-push', bound to `C-x v P'.
817 Implemented for Bzr, Git, Hg. As part of this change, the pre-existing
818 (undocumented) command vc-hg-push now behaves slightly differently.
821 *** The new command vc-region-history shows the log+diff of the active region.
824 *** You can refresh the VC state of a file buffer with `M-x vc-refresh-state'.
825 This command is useful when you perform version control commands
826 outside Emacs (e.g., from the shell prompt), or if you switch the VC
827 back-end for the buffer's file, or remove it from version control.
830 *** New option `vc-annotate-background-mode' controls whether
831 the color range from `vc-annotate-color-map' is applied to the
832 background or to the foreground.
835 *** `compare-windows' now compares text with the most recently selected window
836 instead of the next window. If you want the previous behavior of
837 comparing with the next window, customize the new option
838 `compare-windows-get-window-function' to the value
839 `compare-windows-get-next-window'.
842 *** Two new faces `compare-windows-removed' and `compare-windows-added'
843 replace the face `compare-windows', which is now an obsolete alias for
844 `compare-windows-added'.
847 *** `log-edit-insert-changelog' converts "(tiny change)" to
848 "Copyright-paperwork-exempt: yes". Set `log-edit-rewrite-tiny-change'
851 ** VHDL mode supports VHDL'08.
853 ** Calculator: decimal display mode uses "," groups, so it's more
854 fitting for use in money calculations; factorial works with
857 ** HideIfDef mode now support full C/C++ expressions, argumented macro expansions,
858 interactive macro evaluation and automatic scanning of #defined symbols.
860 *** New custom variable `hide-ifdef-header-regexp' to define C/C++ header file
861 name patterns. Default case-insensitive .h, .hh, .hpp, .hxx, and .h++.
862 *** New custom variable `hide-ifdef-expand-reinclusion-protection' to prevent
863 reinclusion protected header files from being fully hidden.
864 *** New custom variable `hide-ifdef-exclude-define-regexp' to define symbol
865 name patterns (e.g. all "FOR_DOXYGEN_ONLY_*") to be excluded.
869 *** New custom variable `tex-print-file-extension' to help users who
870 use PDF instead of DVI.
872 *** TeX mode now supports Prettify Symbols mode. When enabling
873 `prettify-symbols-mode' in a tex-mode buffer, \alpha ... \omega, and
874 many other math macros are displayed using unicode characters.
876 ** whitespace-mode: new 'big-indent style highlighting too much indentation.
877 By default, 32 spaces and four TABs are considered to be too much but
878 `whitespace-big-indent-regexp' can be configured to change that.
880 ** tildify: `tildify-space-string', `tildify-pattern', and
881 `tildify-foreach-region-function' variables added making
882 `tildify-string-alist', `tildify-pattern-alist', and
883 `tildify-ignored-environments-alist' variables (as well as a few
884 helper functions) obsolete.
887 The new package provides generic framework and new commands to find
888 and move to definitions, as well as pop back to the original location.
891 `xref-find-definitions' replaces `find-tag' and provides an interface
892 to pick one destination among several. Hence, `tags-loop-continue' is
893 unbound. `xref-pop-marker-stack' replaces `pop-tag-mark', but uses an
894 easier binding, which is now unoccupied (`M-,').
895 `xref-find-definitions-other-window' replaces `find-tag-other-window'.
896 `xref-find-definitions-other-frame' replaces `find-tag-other-frame'.
897 `xref-find-apropos' replaces `find-tag-regexp'.
900 `find-tag-marker-ring-length' is now an obsolete alias for
901 `xref-marker-ring-length'. `find-tag-marker-ring' is now an obsolete
902 alias for a private variable. `xref-push-marker-stack' and
903 `xref-pop-marker-stack' should be used to mutate it instead.
906 *** `xref-find-definitions' and `describe-function' now display
907 information about mode local overrides (defined by cedet/mode-local.el
908 `define-overloadable-function' `define-mode-local-overrides').
911 As a result of the above, these commands are now obsolete:
912 `find-tag-other-window', `find-tag-other-frame', `find-tag-regexp',
913 `tags-apropos' and `tags-loop-continue'.
916 EUDC's LDAP backend has been improved.
918 *** EUDC supports LDAP-over-SSL URLs (ldaps://).
920 *** EUDC passes LDAP passwords through a pipe to the ldapsearch
921 subprocess instead of on the command line.
923 *** EUDC handles LDAP wildcards automatically so the user shouldn't
924 need to configure this manually anymore.
926 *** The LDAP configuration section of EUDC's manual has been
929 There have also been customization changes.
931 *** New custom variable `eudc-server-hotlist' to allow specifying
932 multiple EUDC servers in init file.
934 *** Custom variable `eudc-inline-query-format' defaults to completing
935 on email and firstname instead of surname.
937 *** Custom variable `eudc-expansion-overwrites-query' defaults to nil
938 to avoid interfering with the kill ring.
940 *** Custom variable `eudc-inline-expansion-format' defaults to
941 "Firstname Surname <mail-address>".
943 *** Custom variable `eudc-options-file' defaults to
944 "~/.emacs.d/eudc-options".
946 *** New custom variable `ldap-ldapsearch-password-prompt-regexp' to
947 allow overriding the regular expression that recognizes the ldapsearch
948 command line's password prompt.
950 EUDC's BBDB backend now supports BBDB 3.
952 EUDC's PH backend (eudcb-ph.el) is obsolete.
957 *** The new built-in command `clear' can scroll window contents out of sight.
958 If provided with an optional non-nil argument, the scrollback contents will be cleared.
960 *** New buffer syntax '#<buffer-name>', which is equivalent to
961 '#<buffer buffer-name>'. This shorthand makes interacting with
962 buffers from eshell more convenient. Custom variable
963 `eshell-buffer-shorthand', which has been broken for a while, has been
966 *** By default, eshell "visual" program buffers (created by
967 `eshell-visual-commands' and similar custom vars) are no longer killed
968 when their processes die. This fixes issues with short-lived commands
969 and makes visual programs more useful in general. For example, if
970 "git log" is a visual command, it will always show the visual command
971 buffer, even if the "git log" process dies. For the old behavior,
972 make the new option `eshell-destroy-buffer-when-process-dies' non-nil.
976 *** Support for the Conkeror web browser.
979 *** Support for several ancient browsers is now officially obsolete.
982 ** tar-mode: new `tar-new-entry' command, allowing for new members to
983 be added to the archive.
986 ** Autorevert: dired buffers are also auto-reverted via file
987 notifications, if Emacs is compiled with file notification support.
989 ** File Notifications
992 *** The new event `stopped' signals, that a file notification watch is
993 not active any longer.
996 *** The new function `file-notify-valid-p' checks, whether a file
997 notification descriptor still corresponds to an activate watch.
1002 *** The command `dired-do-compress' bound to `Z' now can compress
1003 directories and decompress zip files.
1006 *** New command `dired-do-compress-to' bound to `c' can be used to
1007 compress many marked files into a single named archive. The
1008 compression command is determined from the new
1009 `dired-compress-files-alist' variable.
1011 ** Tabulated List Mode
1014 *** It is now safe for a mode that derives `tabulated-list-mode' to not
1015 call `tabulated-list-init-header', in which case it will have no
1019 *** `tabulated-list-print' takes a second optional argument, update,
1020 which specifies an alternative printing method which is faster when
1021 few or no entries have changed.
1023 ** Obsolete packages
1028 *** landmark.el (moved to elpa.gnu.org)
1031 * New Modes and Packages in Emacs 25.1
1033 ** pinentry.el allows GnuPG passphrase to be prompted through the
1034 minibuffer instead of a graphical dialog, depending on whether the gpg
1035 command is called from Emacs (i.e., INSIDE_EMACS environment variable
1036 is set). This feature requires newer versions of GnuPG (2.1.5 or
1037 later) and Pinentry (0.9.5 or later).
1039 ** cl-generic.el provides CLOS-style multiple-dispatch generic functions.
1041 ** scss-mode (a minor variant of css-mode)
1043 ** let-alist is a new macro (and a package) that allows one to easily
1044 let-bind the values stored in an alist.
1046 ** `tildify-mode' allows to automatically insert hard spaces as one
1047 types the text. Breaking line after a single-character words is
1048 forbidden by Czech and Polish typography (and may be discouraged in
1049 other languages), so `auto-tildify-mode' makes it easier to create
1050 a typographically-correct documents.
1052 ** The `seq' library adds sequence manipulation functions and macros
1053 that complement basic functions provided by subr.el. All functions
1054 are prefixed with `seq-' and work on lists, strings and vectors.
1056 ** The `map' library provides map-manipulation functions that work on
1057 alists, hash-table and arrays. All functions are prefixed with
1060 ** The `thunk' library provides functions and macros to control the
1061 evaluation of forms.
1063 ** js-jsx-mode (a minor variant of js-mode) provides indentation
1064 support for JSX, an XML-like syntax extension to ECMAScript.
1067 * Incompatible Lisp Changes in Emacs 25.1
1070 ** `setq' and `setf' must now be called with an even number of
1071 arguments. The earlier behavior of silently supplying a nil to the
1072 last variable when there was an odd number of arguments has been
1075 ** `syntax-begin-function' is declared obsolete.
1076 Removed font-lock-beginning-of-syntax-function and the SYNTAX-BEGIN
1077 slot in font-lock-defaults.
1080 ** `package-initialize' now sets `package-enable-at-startup' to nil if
1081 called during startup. Users who call this function in their init
1082 file and still expect it to be run after startup should set
1083 `package-enable-at-startup' to t after the call to
1084 `package-initialize'.
1086 ** `:global' minor mode use `setq-default' rather than `setq'.
1087 This means that you can't use `make-local-variable' and expect them to
1088 "magically" become buffer-local.
1090 ** `inhibit-point-motion-hooks' now defaults to t and is obsolete.
1093 ** `track-mouse' no longer freezes the shape of the mouse pointer.
1094 The `track-mouse' form no longer refrains from changing the shape of
1095 the mouse pointer for the entire time the body of that form is
1096 executed. Lisp programs that use `track-mouse' for dragging across
1097 large portions of the Emacs display, and want to avoid changes in the
1098 pointer shape during dragging, should bind the variable `track-mouse'
1099 to the special value `dragging' in the body of the form.
1102 ** The optional `predicate' argument of `lisp-complete-symbol' no longer
1103 has any effect. (This change was made in Emacs 24.4 but was not
1104 advertised at the time.)
1106 ** `indirect-function' does not signal `void-function' any more.
1107 This is mostly a bug-fix, since this change was missed back in 24.4 when
1108 symbol-function was changed not to signal `void-function' any more.
1110 *** As a consequence, the second arg of `indirect-function' is now obsolete.
1112 ** Comint, term, and compile do not set the EMACS env var any more.
1113 Use the INSIDE_EMACS environment variable instead.
1115 ** `save-excursion' does not save&restore the mark any more.
1117 ** read-buffer-function can now be called with a 4th argument (`predicate').
1119 ** completion-table-dynamic stays in the minibuffer.
1120 If you want the old behavior of calling the function in the buffer
1121 from which the minibuffer was entered, call it with the new argument
1124 ** window-configurations no longer record the buffers' marks.
1126 ** inhibit-modification-hooks now also inhibits lock-file checks, as well as
1127 active region handling.
1129 ** deactivate-mark is now buffer-local.
1131 ** `cl-the' now asserts that its argument is of the given type.
1133 ** `process-running-child-p` may now return a numeric process
1134 group ID instead of `t'.
1137 ** Mouse click events on mode line or header line no longer include
1138 any reference to a buffer position. The 6th member of the mouse
1139 position list returned for such events is now nil.
1141 ** Menu items in keymaps do not support the "key shortcut cache" any more.
1142 These slots used to hold key-shortcut data, but have been obsolete since
1145 ** Emacs no longer downcases the first letter of a system diagnostic
1146 when signaling a file error. For example, it now reports "Permission
1147 denied" instead of "permission denied". The old behavior was problematic
1148 in languages like German where downcasing rules depend on grammar.
1151 ** New variable ‘text-quoting-style’ to control how Emacs translates quotes.
1152 Set it to ‘curve’ for curved single quotes ‘like this’, to ‘straight’
1153 for straight apostrophes 'like this', and to ‘grave’ for grave accent
1154 and apostrophe `like this'. The default value nil acts like ‘curve’
1155 if curved single quotes are displayable, and like ‘grave’ otherwise.
1156 The new variable affects display of diagnostics and help, but not of info.
1159 ** substitute-command-keys now replaces quotes.
1160 That is, it converts documentation strings’ quoting style as per the
1161 value of ‘text-quoting-style’. Doc strings in source code can use
1162 either curved single quotes or grave accents and apostrophes. As
1163 before, characters preceded by \= are output as-is.
1166 ** Message-issuing functions ‘error’, ‘message’, etc. now convert quotes.
1167 They use the new ‘format-message’ function instead of plain ‘format’,
1168 so that they now follow user preference as per ‘text-quoting-style’
1169 when processing curved single quotes, grave accents, and apostrophes
1170 in their format argument.
1173 ** The character classes [:alpha:] and [:alnum:] in regular expressions
1174 now match multibyte characters using Unicode character properties.
1175 If you want the old behavior where they matched any character with
1176 word syntax, use `\sw' instead.
1179 ** The character classes [:graph:] and [:print:] in regular expressions
1180 no longer match every multibyte character. Instead, Emacs now
1181 consults the Unicode character properties to determine which
1182 characters are graphic or printable. In particular, surrogates and
1183 unassigned codepoints are now rejected. If you want the old behavior,
1184 use [:multibyte:] instead.
1187 ** The `diff' command uses the unified format now. To restore the old
1188 behavior, set `diff-switches' to `-c'.
1190 ** `grep-template' and `grep-find-template' values don't include the
1191 --color argument anymore. It's added at the <C> place holder position
1192 dynamically. Any third-party code that changes these templates should
1193 be updated accordingly.
1196 ** ‘(/ N)’ is now equivalent to ‘(/ 1 N)’ rather than to ‘(/ N 1)’.
1197 The new behavior is compatible with Common Lisp and with XEmacs.
1198 This change does not affect Lisp code intended to be portable to
1199 Emacs 24.2 and earlier, which did not support unary ‘/’.
1202 ** The `default-directory' value doesn't have to end slash. To make
1203 that happen, `unhandled-file-name-directory' now defaults to calling
1204 `file-name-as-directory'.
1207 * Lisp Changes in Emacs 25.1
1210 *** New UPatterns `quote', `app', `cl-struct', `eieio', `seq', and `map'.
1211 *** New UPatterns can be defined with `pcase-defmacro'.
1213 *** New vector QPattern.
1215 ** syntax-propertize is now automatically called on-demand during forward
1216 parsing functions like `forward-sexp'.
1218 ** New hooks prefix-command-echo-keystrokes-functions and
1219 prefix-command-preserve-state-hook, to allow the definition of prefix
1220 commands other than the predefined C-u.
1222 ** New functions `filepos-to-bufferpos' and `bufferpos-to-filepos'.
1224 ** The default value of `load-read-function' is now `read'.
1226 ** New hook `pre-redisplay-functions', a bit easier to use than pre-redisplay-function.
1228 ** The second arg of `looking-back' should always be provided explicitly.
1230 ** Obsolete text properties `intangible', `point-entered', and `point-left'.
1231 Replaced by properties `cursor-intangible' and `cursor-sensor-functions',
1232 implemented by the new `cursor-intangible-mode' and
1233 `cursor-sensor-mode' minor modes.
1235 ** New process type `pipe', which can be used in combination with the
1236 `:stderr' keyword of make-process to handle standard error output
1239 ** New function `make-process' provides an alternative interface to
1240 `start-process'. It allows programs to set process parameters such as
1241 process filter, sentinel, etc., through keyword arguments (similar to
1242 `make-network-process').
1245 ** A new function `directory-files-recursively' returns all matching
1246 files (recursively) under a directory.
1249 ** New variable `inhibit-message', when bound to non-nil, inhibits
1250 `message' and related functions from displaying messages the Echo
1251 Area. The output is still logged to the *Messages* buffer.
1254 ** A new text property `inhibit-read-only' can be used in read-only
1255 buffers to allow certain parts of the text to be writable.
1258 ** New macro `define-advice'.
1260 ** `read-buffer' takes a new `predicate' argument.
1262 ** Emacs Lisp now supports generators.
1264 ** New finalizer facility for running code when objects
1267 ** lexical closures can use (:documentation <form>) to build their docstring.
1268 It should be placed right where the docstring would be, and <form> is then
1269 evaluated (and should return a string) when the closure is built.
1271 ** define-inline provides a new way to define inlinable functions.
1273 ** New function `macroexpand-1' to perform a single step of macroexpansion.
1275 ** Some "x-*" were obsoleted:
1276 *** x-select-text is renamed gui-select-text.
1277 *** x-selection-value is renamed gui-selection-value.
1278 *** x-get-selection is renamed gui-get-selection.
1279 *** x-get-clipboard and x-clipboard-yank are marked obsolete.
1280 *** x-get-selection-value is renamed to gui-get-primary-selection.
1281 *** x-set-selection is renamed to gui-set-selection
1283 ** New function `string-greaterp', which return the opposite result of
1287 ** The new functions `string-collate-lessp' and `string-collate-equalp'
1288 preserve the collation order as defined by the system's locale(1)
1289 environment. For the time being this is implemented for modern POSIX
1290 systems and for MS-Windows, for other systems they fall back to their
1291 counterparts `string-lessp' and `string-equal'.
1294 *** The ls-lisp package uses `string-collate-lessp' to sort file names.
1295 If you want the old, locale-independent sorting, customize the new
1296 option `ls-lisp-use-string-collate' to a nil value.
1299 *** The MS-Windows specific variable `w32-collate-ignore-punctuation',
1300 if set to a non-nil value, causes the above 2 functions to ignore
1301 symbol and punctuation characters when collating strings. This
1302 emulates the behavior of modern Posix platforms when the locale's
1303 codeset is "UTF-8" (as in "en_US.UTF-8"). This is needed because
1304 MS-Windows doesn't support UTF-8 as codeset in its locales.
1306 ** New function `alist-get', which is also a valid place (aka lvalue).
1308 ** New function `funcall-interactively', which works like `funcall'
1309 but makes `called-interactively-p' treat the function as (you guessed it)
1310 called interactively.
1312 ** New function `function-put' to use instead of `put' for function properties.
1315 ** The new function `bidi-find-overridden-directionality' allows to
1316 find characters whose directionality was, perhaps maliciously,
1317 overridden by directional override control characters. Lisp programs
1318 can use this to detect potential phishing of URLs and other links that
1319 exploits bidirectional display reordering.
1322 ** The new function `buffer-substring-with-bidi-context' allows to
1323 copy a portion of a buffer into a different location while preserving
1324 the visual appearance both of the copied text and the text at
1325 destination, even when the copied text includes mixed bidirectional
1326 text and directional control characters.
1329 ** New properties that can be specified with `declare':
1330 *** (interactive-only INSTEAD), says to use INSTEAD for non-interactive use.
1331 *** (pure VAL), if VAL is non-nil, indicates the function is pure.
1332 *** (side-effect-free VAL), if VAL is non-nil, indicates the function does not
1336 ** New macro `with-file-modes', for evaluating expressions with default file
1337 permissions set to temporary values (e.g., for creating private files).
1339 ** You can access the slots of structures using `cl-struct-slot-value'.
1341 ** Function `sort' can deal with vectors.
1343 ** Function `system-name' now returns an updated value if the current
1344 system's name has changed or if the Emacs process has changed systems,
1345 and to avoid long waits it no longer consults DNS to canonicalize the
1346 name. The variable `system-name' is now obsolete.
1349 ** Function `write-region' no longer outputs "Wrote FILE" in batch mode.
1351 ** If `pwd' is called with a prefix argument, insert the current default
1355 ** New functions return extended information about fonts and faces.
1358 *** The function `font-info' now returns more details about a font.
1359 In particular, it now returns the average width of the font's
1360 characters, which can be used for geometry-related calculations.
1363 *** A new function `default-font-width' returns the average width of a
1364 character in the current buffer's default font. If the default face
1365 is remapped (see `face-remapping-alist'), the value for the remapped
1366 face is returned. This function complements the existing function
1367 `default-font-height'.
1370 *** New functions `window-font-height' and `window-font-width' return
1371 the height and average width of characters in a specified face and
1372 window. If FACE is remapped (see `face-remapping-alist'), the
1373 function returns the information for the remapped face.
1376 *** A new function `window-max-chars-per-line' returns the maximal
1377 number of characters that can be displayed on one line. If a face
1378 and/or window are provided, these values are used for the
1379 calculation. This function is different from `window-body-width' in
1380 that it accounts for (i) continuation glyphs, (ii) the size of the
1381 font, and (iii) the specified window.
1384 ** New utilities in subr-x.el:
1385 *** New macros `if-let' and `when-let' allow defining bindings and to
1386 execute code depending whether all values are true.
1387 *** New macros `thread-first' and `thread-last' allow threading a form
1388 as the first or last argument of subsequent forms.
1391 ** Documentation strings now support quoting with curved single quotes
1392 ‘like-this’ in addition to the old style with grave accent and
1393 apostrophe `like-this'. The new style looks better on today's displays.
1394 In the new Electric Quote mode, you can enter curved single quotes
1395 into documentation by typing ` and '. Outside Electric Quote mode,
1396 you can enter them by typing ‘C-x 8 [’ and ‘C-x 8 ]’, or (if your Alt
1397 key works) by typing ‘A-[’ and ‘A-]’. As described above under
1398 ‘text-quoting-style’, the user can specify how to display doc string
1402 ** New function ‘format-message’ is like ‘format’ and also converts
1403 curved single quotes, grave accents and apostrophes as per
1404 ‘text-quoting-style’.
1407 ** show-help-function's arg is converted via substitute-command-keys
1408 before being passed to the function. Help strings, help-echo
1409 properties, etc. can therefore contain command key escapes and
1413 ** Time-related changes:
1415 *** Time conversion functions now accept an optional ZONE argument
1416 that specifies the time zone rules for conversion. ZONE is omitted or
1417 nil for Emacs local time, t for Universal Time, ‘wall’ for system wall
1418 clock time, or a string as in ‘set-time-zone-rule’ for a time zone
1419 rule. The affected functions are ‘current-time-string’,
1420 ‘current-time-zone’, ‘decode-time’, and ‘format-time-string’. The
1421 function ‘encode-time’, which already accepted a simple time zone rule
1422 argument, has been extended to accept all the new forms.
1424 *** Time-related functions now consistently accept numbers
1425 (representing seconds since the epoch) and nil (representing the
1426 current time) as well as the usual list-of-integer representation.
1427 Affected functions include `current-time-string', `current-time-zone',
1428 `decode-time', `float-time', `format-time-string', `seconds-to-time',
1429 `time-add', `time-less-p', `time-subtract', `time-to-day-in-year',
1430 `time-to-days', and `time-to-seconds'.
1432 *** The `encode-time-value' and `with-decoded-time-value' macros have
1435 *** `calendar-next-time-zone-transition', `time-add', and
1436 `time-subtract' no longer return time values in the obsolete and
1437 undocumented integer-pair format. Instead, they return a list of two
1441 ** New function `set-binary-mode' allows to switch a standard stream
1442 of the Emacs process to binary I/O mode.
1445 ** The new function `directory-name-p' can be used to check whether a file
1446 name (as returned from, for instance, `file-name-all-completions') is
1447 a directory file name. It returns non-nil if the last character in
1448 the name is a directory separator character (forward slash on GNU and
1449 Unix systems, forward- or backslash on MS-Windows and MS-DOS).
1451 ** ASCII approximations to curved quotes are put in standard-display-table
1452 if the terminal cannot display curved quotes.
1454 ** Standard output and error streams now transliterate characters via
1455 standard-display-table, and encode output using locale-coding-system.
1458 ** New var `truncate-string-ellipsis' to choose how to indicate truncation.
1461 ** New possible value for `system-type': `nacl'.
1462 This is used by Google's Native Client (NaCl).
1464 ** Miscellaneous name change
1466 For consistency with the usual Emacs spelling, the Lisp variable
1467 `hfy-optimisations' has been renamed to `hfy-optimizations'.
1468 The old name should still work, as an obsolescent alias.
1471 * Changes in Frames and Windows Code in Emacs 25.1
1474 ** Emacs can now draw horizontal scroll bars on some platforms that
1475 provide toolkit scroll bars, namely Gtk+, Lucid, Motif and Windows.
1476 Horizontal scroll bars are turned off by default.
1477 *** New function `horizontal-scroll-bars-available-p' telling whether
1478 horizontal scroll bars are available on the underlying system.
1479 *** New mode `horizontal-scroll-bar-mode' to toggle horizontal scroll
1480 bars on all existing and future frames.
1481 *** New function `toggle-horizontal-scroll-bar' to toggle horizontal
1482 scroll bars on the selected frame.
1483 *** New frame parameters `horizontal-scroll-bars' and
1484 `scroll-bar-height' to set horizontal scroll bars and their height
1485 for individual frames and in `default-frame-alist'.
1486 *** New functions `frame-scroll-bar-height' and
1487 `window-scroll-bar-height' return the height of horizontal scroll
1488 bars on a specific frame or window.
1489 *** `set-window-scroll-bars' now accepts five parameters where the last
1490 two specify height and type of the window's horizontal scroll bar.
1491 *** `window-scroll-bars' now returns type and sizes of horizontal scroll
1493 *** New buffer-local variables `horizontal-scroll-bar' and
1494 `scroll-bar-height'.
1497 ** New functions `frame-geometry' and `frame-edges' give access to a
1501 ** New functions `mouse-absolute-pixel-position' and
1502 `set-mouse-absolute-pixel-position' get/set screen coordinates of the
1506 ** The function `window-edges' now accepts three additional arguments to
1507 retrieve body, absolute and pixel edges of the window.
1510 ** The functions `window-inside-edges', `window-inside-pixel-edges' and
1511 `window-inside-absolute-pixel-edges' have been renamed to respectively
1512 `window-body-edges', `window-body-pixel-edges' and
1513 `window-absolute-body-pixel-edges'. The old names are kept as aliases.
1516 ** New function `window-absolute-pixel-position' to get the screen
1517 coordinates of a visible buffer position.
1520 ** The height of a frame's menu and tool bar are no longer counted in the
1521 frame's text height. This means that the text height stands only for
1522 the height of the frame's root window plus that of the echo area (if
1523 present). This was already the behavior for frames with external tool
1524 and menu bars (like in the Gtk builds) but has now been extended to all
1528 ** Frames now do not necessarily preserve the number of columns or lines
1529 they display when setting default font, menu bar, fringe width, or
1530 scroll bars. In particular, maximized and fullscreen frames are
1531 conceptually never resized if such settings change. For fullheight and
1532 fullwidth frames, the behavior may depend on the toolkit used.
1533 *** New option `frame-inhibit-implied-resize' if non-nil, means that
1534 setting default font, menu bar, fringe width, or scroll bars of a
1535 specific frame does not resize that frame in order to preserve the
1536 number of columns or lines it displays.
1539 ** New function `window-preserve-size' allows to preserve the size of
1540 windows without "fixing" it. It's supported by `fit-window-to-buffer',
1541 `temp-buffer-resize-mode' and `display-buffer'.
1544 ** New `display-buffer' action function `display-buffer-use-some-frame'.
1545 This displays the buffer in an existing frame other than the current
1546 frame, and allows the caller to specify a frame predicate to exclude
1550 ** New minor mode `window-divider-mode' and options
1551 `window-divider-default-places', `window-divider-default-bottom-width'
1552 and `window-divider-default-right-width'.
1554 ** Tearoff menus and detachable toolbars for Gtk+ has been removed.
1555 Those features have been deprecated in Gtk+ for a long time.
1559 *** etags no longer qualifies class members by default.
1561 By default, `etags' will not qualify class members for C-like
1562 object-oriented languages with their class names and namespaces, and
1563 will remove qualifications used explicitly in the code from the tag
1564 names it puts in TAGS files. This is so the etags.el back-end for
1565 `xref-find-definitions' is more accurate and produces less false
1568 Use --class-qualify (-Q) if you want the old default behavior of
1569 qualifying class members in C++, Java, and Objective C. Note that
1570 using -Q might make some class members become "unknown" to `M-.'
1571 (`xref-find-definitions'); if so, you can use `C-u M-.' to specify the
1572 qualified names by hand.
1574 *** New language Ruby
1576 Names of modules, classes, methods, and functions are tagged.
1577 Overloaded operators are also tagged.
1579 *** Improved support for Lua
1581 Etags now tags functions even if the "function" keyword follows some
1582 whitespace at line beginning.
1585 * Changes in Emacs 25.1 on Non-Free Operating Systems
1588 ** MS-Windows specific Emacs build scripts are no longer in the distribution
1589 This includes the makefile.w32-in files in various subdirectories, and
1590 the support files. The file nt/configure.bat now just tells the user
1591 to use the procedure described in nt/INSTALL, by running the Posix
1592 `configure' script in the top-level directory.
1595 ** Building Emacs for MS-Windows requires at least Windows XP
1596 or Windows Server 2003. The built binaries still run on all versions
1597 of Windows starting with Windows 9X.
1600 ** Emacs running on MS-Windows now supports the daemon mode.
1602 ** The byte counts in etags-generated TAGS files are now the same on
1603 MS-Windows as they are on other platforms.
1606 ** On OS X, configure creates a Cocoa ("Nextstep") build by default.
1607 Pass '--without-ns' to configure to create an X11 build, the old default.
1609 ** OS X 10.5 or older is no longer supported.
1611 ** OS X on PowerPC is no longer supported.
1614 ** New variable `ns-use-fullscreen-animation' controls animation for
1615 non-native NS fullscreen. The default is nil. Set to t to enable
1616 animation when entering and leaving fullscreen. For native OSX fullscreen
1620 ** The new function 'w32-application-type' returns the type of an
1621 MS-Windows application given the name of its executable program file.
1624 ----------------------------------------------------------------------
1625 This file is part of GNU Emacs.
1627 GNU Emacs is free software: you can redistribute it and/or modify
1628 it under the terms of the GNU General Public License as published by
1629 the Free Software Foundation, either version 3 of the License, or
1630 (at your option) any later version.
1632 GNU Emacs is distributed in the hope that it will be useful,
1633 but WITHOUT ANY WARRANTY; without even the implied warranty of
1634 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1635 GNU General Public License for more details.
1637 You should have received a copy of the GNU General Public License
1638 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
1644 paragraph-separate: "[
\f]*$"