GNU Emacs NEWS -- history of user-visible changes.
-Copyright (C) 2014-2015 Free Software Foundation, Inc.
+Copyright (C) 2014-2016 Free Software Foundation, Inc.
See the end of the file for license conditions.
Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
When you add a new item, use the appropriate mark if you are sure it applies,
otherwise leave it unmarked.
+\f
+* Installation Changes in Emacs 25.2
+
+\f
+* Startup Changes in Emacs 25.2
+
+\f
+* Changes in Emacs 25.2
+
+** It is possible to disable attempted recovery on fatal signals
+
+Two new variables allow to disable attempts to recover from stack
+overflow and to avoid automatic auto-save when Emacs is delivered a
+fatal signal. `attempt-stack-overflow-recovery', if set to `nil',
+will disable attempts to recover from C stack overflows; Emacs will
+then crash as with any other fatal signal.
+`attempt-orderly-shutdown-on-fatal-signal', if set to `nil', will
+disable attempts to auto-save the session and shut down in an orderly
+fashion when Emacs receives a fatal signal; instead, Emacs will
+terminate immediately. Both variables are non-`nil' by default.
+These variables are for users who would like to avoid the small
+probability of data corruption due to techniques Emacs uses to recover
+in these situations.
+
+\f
+* Editing Changes in Emacs 25.2
+
+\f
+* Changes in Specialized Modes and Packages in Emacs 25.2
+
+** eww
+
++++
+*** A new `s' command for switching to another eww buffer via the minibuffer.
+
++++
+** The commands that add ChangeLog entries now prefer a VCS root directory
+for the ChangeLog file, if none already exists. Customize
+`change-log-directory-files' to nil for the old behavior.
+
+---
+** Support for non-string values of `time-stamp-format' has been removed.
+
+** Tramp
+
++++
+*** New connection method "sg", which allows to edit files under
+different group ID.
+
++++
+*** New connection method "doas" for OpenBSD hosts.
+
+\f
+* New Modes and Packages in Emacs 25.2
+
+\f
+* Incompatible Lisp Changes in Emacs 25.2
+
+\f
+* Lisp Changes in Emacs 25.2
+
+** New var syntax-ppss-table to control the syntax-table used in syntax-ppss
+
+** Autoload files can be generated without timestamps,
+by setting `autoload-timestamps' to nil.
+
+\f
+* Changes in Emacs 25.2 on Non-Free Operating Systems
+
\f
* Installation Changes in Emacs 25.1
** New configure option --with-cairo.
This builds Emacs with Cairo drawing. As a side effect, it provides
support for built-in printing, when Emacs was built with GTK+.
+Cairo drawing is an experimental feature in Emacs, and subject to
+change in future releases.
++++
** New configure option --with-modules.
This enables support for loading dynamic modules; see below.
** 'configure' now prefers inotify to gfile for file notification,
unless gfile is explicitly requested via --with-file-notification='gfile'.
+---
+** 'configure' detects the kqueue file notification library on *BSD
+and Mac OS X machines.
+
---
** The configure option '--with-pkg-config-prog' has been removed.
Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to.
build with 'make V=1'.
---
-** The configure option '--with-gameuser' now allows to specify a
+** The configure option '--with-gameuser' now allows you to specify a
group instead of a user if its argument is prefixed by ':' (a colon).
This will cause the game score files in ${localstatedir}/games/emacs
to be owned by that group, and the helper program for updating them to
Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png.
The old Emacs logo icons are available as `emacs23.png' in the same location.
+---
+** New make target `check-expensive' to run additional tests.
+This includes all tests which run via "make check", plus additional
+tests which take more time to perform.
+
\f
* Startup Changes in Emacs 25.1
\f
* Changes in Emacs 25.1
++++
+** Xwidgets: a new feature for embedding native widgets inside Emacs buffers.
+If you have gtk3 and webkitgtk3 installed, and Emacs was built with
+xwidget support, you can access the embedded webkit browser with `M-x
+xwidget-webkit-browse-url'. This opens a new buffer with the embedded
+browser. The buffer will have a new mode, `xwidget-webkit-mode'
+(similar to `image-mode'), which supports the webkit widget.
+
++++
+*** New functions for xwidget-webkit mode `xwidget-webkit-insert-string',
+`xwidget-webkit-adjust-size-dispatch', `xwidget-webkit-back',
+`xwidget-webkit-browse-url', `xwidget-webkit-reload',
+`xwidget-webkit-current-url', `xwidget-webkit-scroll-backward',
+`xwidget-webkit-scroll-forward', `xwidget-webkit-scroll-down',
+`xwidget-webkit-scroll-up'.
+
++++
** Emacs can now load shared/dynamic libraries (modules).
A dynamic Emacs module is a shared library that provides additional
functionality for use in Emacs Lisp programs, just like a package
at configure time.
+++
-** Any file of the form .dir-locals*.el is now considered a dir-local
-file, and multiple such files can be used in the same directory. See
-the variable `dir-locals-file' for more information.
+** A second dir-local file (.dir-locals-2.el) is now accepted.
+See the variable `dir-locals-file-2' for more information.
+++
** Network security (TLS/SSL certificate validity and the like) is
added via the new Network Security Manager (NSM) and controlled via
the `network-security-level' variable.
+---
+** International domain names (IDNA) are now encoded via the new
+puny.el library, so that one can visit web sites like
+"http://méxico.icom.museum".
+
+++
** C-h l now also lists the commands that were run.
+** The new M-s M-w key binding uses eww to search the web for the
+text in the region.
+
+++
-** x-select-enable-clipboard is renamed select-enable-clipboard
-and x-select-enable-primary is renamed select-enable-primary.
+** The new `timer-list' command lists all active timers in a buffer
+where you can cancel them with the `c' command.
+
+** M-x suggests shorthands and ignores obsolete commands for completion.
+** x-select-enable-clipboard is renamed select-enable-clipboard.
+x-select-enable-primary and renamed select-enable-primary.
Additionally they both now apply to all systems (OSX, GNUstep, Windows, you
name it), with the proviso that on some systems (e.g. Windows)
select-enable-primary is ineffective since the system doesn't
have the equivalent of a primary selection.
+++
-** New option `switch-to-buffer-in-dedicated-window' allows to customize
-how `switch-to-buffer' proceeds interactively when the selected window
-is strongly dedicated to its buffer.
+** New option `switch-to-buffer-in-dedicated-window' allows you to
+customize how `switch-to-buffer' proceeds interactively when the
+selected window is strongly dedicated to its buffer.
+++
** The option `even-window-heights' has been renamed to
`even-window-sizes' and now handles window widths as well.
++++
+** New function `read-multiple-choice' use to prompt for
+multiple-choice questions, with a handy way to display help texts.
+
+++
** terpri gets an optional arg ENSURE to conditionally output a newline.
variable `read-hide-char'.
---
-** New input method: `tamil-dvorak'.
+** New input methods: `tamil-dvorak' and `programmer-dvorak'.
\f
* Editing Changes in Emacs 25.1
** New minor mode global-eldoc-mode is enabled by default.
---
-** Emacs now supports "bracketed paste mode" when running on a terminal
-that supports it. This facility allows Emacs to understand pasted
-chunks of text as strings to be inserted, instead of interpreting each
-character in the pasted text as actual user input. This results in a
-paste experience similar to that under a window system, and significant
-performance improvements when pasting large amounts of text.
+** Emacs now uses "bracketed paste mode" on text terminals that support it.
+Bracketed paste mode causes text terminals to wrap pasted text in special
+escape sequences that allow Emacs to tell the difference between text
+you type and text you paste from other applications. Emacs then
+avoids interpreting each character in the pasted text as it does with
+keyboard input, which results in a paste experience similar to that
+under a window system, and significant performance improvements when
+pasting large amounts of text.
+
+Bracketed paste mode is disabled by default, so Emacs automatically
+enables it at startup if the terminal supports it.
+++
** Emacs now supports the latest version of the UBA.
It's meant for use together with `compile':
emacs -batch --eval "(checkdoc-file \"subr.el\")"
+** Desktop
+
+---
+*** The desktop format version has been upgraded from 206 to 208.
+Although Emacs 25.1 can read a version 206 desktop, earlier Emacsen
+cannot read a version 208 desktop. To upgrade your desktop file, you
+must explicitly request the upgrade, by C-u M-x desktop-save. You are
+recommended to do this as soon as you have firmly upgraded to Emacs
+25.1 (or later). Should you ever need to downgrade your desktop file
+to version 206, you can do this with C-u C-u M-x desktop-save.
+
+++
** New function `bookmark-set-no-overwrite' bound to C-x r M.
It raises an error if a bookmark of that name already exists,
unlike `bookmark-set' which silently updates an existing bookmark.
+** Gnus
+
++++
+*** New user options `mm-html-inhibit-images' and `mm-html-blocked-images'
+now control how mm-* functions fetch and display images in an HTML
+message. Gnus still uses `gnus-inhibit-images' and `gnus-blocked-images'
+for that purpose, i.e., binds mm-html- variables with those gnus-
+variables, but other packages do not have to bind gnus- variables now.
+
+---
+*** `mm-inline-text-html-with-images' has been removed.
+Use `mm-html-inhibit-images' instead. Note that the value is opposite
+in meaning.
+
+** IMAP
+
+---
+*** `imap-ssl-program' has been removed, and imap.el uses the internal
+GnuTLS encryption functions if possible.
+
** JSON
---
`erc-network-hide-list' and `erc-channel-hide-list' will only hide the
specified message types for the respective specified targets.
+*** New variable `erc-default-port-tls' used to connect to TLS IRC
+servers.
+
+---
+*** Reconnection is now asynchronous.
+
+---
+*** Nick completion is now case-insensitive again after inadvertently
+being made case-sensitive in Emacs 24.2.
+
+** MPC
+
+---
+*** New commands, key binds, and menu items.
+
+**** `<' and `>' for navigating previous and next tracks in playlist
+
+**** New play/pause command `mpc-toggle-play' bound to `s'
+
+**** `g' bound to new command `mpc-seek-current' will navigate current
+ track.
+
+**** New commands `mpc-toggle-{consume,repeat,single,shuffle}' for
+ toggling playback modes.
+
+---
+*** Now supports connecting to a UNIX domain socket.
+
+---
+*** Looks at more image file names to use as album art.
+Case-insensitively tries for .folder.png (freedesktop) and folder.jpg
+(XP) in addition to cover.jpg.
+
+---
+*** Searches in more locations for MPD configuration files.
+MPD supports the XDG base directory specification since version 0.17.6.
+
** Midnight-mode
---
dependencies). This variable can also be manually customized.
---
-*** New command `package-install-user-selected-packages' installs all
+*** New command `package-install-selected-packages' installs all
packages from `package-selected-packages' which are currently missing.
---
*** The <class> variables are declared obsolete.
+++
*** The <initarg> variables are declared obsolete.
++++
*** defgeneric and defmethod are declared obsolete.
+Use the equivalent facilities from cl-generic.el instead.
+++
*** `constructor' is now an obsolete alias for `make-instance'.
+--- `pcase' accepts a new UPattern `eieio'.
** ido
** Search and Replace
+++
-*** New user option `search-default-regexp-mode'
+*** New user option `search-default-mode'
specifies the default mode for I-search.
+++
whether to use variable-pitch fonts or not. The user can also
customize the `shr-use-fonts' variable.
++++
+*** A new command `C' (`eww-toggle-colors') can be used to toggle
+whether to use the HTML-specified colors or not. The user can also
+customize the `shr-use-colors' variable.
+
+++
*** A new command `R' (`eww-readable') will try do identify the main
textual parts of a web page and display only that, leaving menus and
*** text/html messages that contain inline image parts will be
transformed into multipart/related messages before sending.
+---
+*** The `message-valid-fqdn-regexp' variable has been removed, since
+there are now top-level domains added all the time. Message will no
+longer warn about sending emails to top-level domains it hasn't heard
+about.
+
+*** `message-beginning-of-line' (bound to C-a) understands folded headers.
+In `visual-line-mode' it will look for the true beginning of a header
+while in non-`visual-line-mode' it will move the point to the indented
+header’s value.
+
+++
** In Show Paren Mode, a parenthesis can be highlighted when point
stands inside it, and certain parens can be highlighted when point is
respectively, `show-paren-when-point-inside-paren' or
`show-paren-when-point-in-periphery'.
+---
+** If gpg2 exists on the system, it is now used as the default value
+of `epg-gpg-program' (instead of gpg).
+
+** Images
+
++++
+*** Images are automatically scaled before displaying based on the
+`image-scaling-factor' variable (if Emacs supports scaling the images
+in question).
+
+*** Images inserted with `insert-image' and related functions get a
+keymap put into the text properties (or overlays) that span the
+image. This keymap binds keystrokes for manipulating size and
+rotation, as well as saving the image to a file.
+
** Lisp mode
+
+---
*** Strings after `:documentation' are highlighted as docstrings.
+This enhances Lisp mode fontification to handle documentation of the
+form `(:documentation "the doc string")' used in Common Lisp code for
+CLOS class and slot documentation.
** Rectangle editing
+++
*** New functions `cl-fresh-line', `cl-digit-char-p', and `cl-parse-integer'.
+---
+*** `pcase' accepts the new UPattern `cl-struct'.
+
** Calendar and diary
+++
log file, then it can be passed as an argument to the above function
to produce a neat summary.
+---
** New js.el option `js-indent-first-init'.
+It was renamed from `js-indent-first-initialiser', to avoid issues
+with American vs British spelling.
** Info
---
*** Fatal TLS errors are now silent by default.
+---
+*** If Emacs isn't built with TLS support, an external TLS-capable
+program is used instead. This program used to be run in --insecure
+mode by default, but has now changed to be secure instead, and will
+fail if you try to connect to non-verifiable hosts. This is
+controlled by the `tls-program' variable.
+
** URL
++++
*** The URL package accepts now the protocols "ssh", "scp" and "rsync".
When `url-handler-mode' is enabled, file operations for these
protocols as well as for "telnet" and "ftp" are passed to Tramp.
++++
*** The URL package allows customizing the `url-user-agent' string.
The new `url-user-agent' variable can be customized to be a string or
a function.
+---
*** The new interface variable `url-request-noninteractive' can be used
to specify that we're running in a noninteractive context, and that
we should not be queried about things like TLS certificate validity.
+---
*** If URL is used with a https connection, the first callback argument
plist will contain a :peer element that has the output of
`gnutls-peer-status' (if Emacs is built with GnuTLS support).
** Tramp
+++
-*** New connection method "afp", which allows to access Mac OS X
+*** New connection method "afp", which allows you to access Mac OS X
volumes via the Apple Filing Protocol.
+++
-*** New connection method "nc", which allows to access dumb busyboxes.
+*** New connection method "nc", which allows you to access dumb
+busyboxes.
+++
*** Method-specific parameters can be overwritten now with variable
** SQL mode
+---
*** New user variable `sql-default-directory' enables remote
connections using Tramp.
-*** New command `sql-send-line-and-next' sends the current line to the
-interactive buffer and advances to the next line, skipping whitespace
-and comments.
+---
+*** New command `sql-send-line-and-next'.
+This command, bound to `C-c C-n' by default, sends the current line to
+the SQL process and advances to the next line, skipping whitespace and
+comments.
-*** Add support for Vertica SQL.
+---
+*** Added support for Vertica SQL.
** VC and related modes
++++
*** Basic push support, via `vc-push', bound to `C-x v P'.
Implemented for Bzr, Git, Hg. As part of this change, the pre-existing
(undocumented) command vc-hg-push now behaves slightly differently.
++++
*** The new command vc-region-history shows the log+diff of the active region.
+++
outside Emacs (e.g., from the shell prompt), or if you switch the VC
back-end for the buffer's file, or remove it from version control.
++++
*** New option `vc-annotate-background-mode' controls whether
the color range from `vc-annotate-color-map' is applied to the
background or to the foreground.
-*** `compare-windows' now compares text with the most recently used window
-instead of the next window. The new option `compare-windows-get-window-function'
-allows to customize this.
++++
+*** `compare-windows' now compares text with the most recently selected window
+instead of the next window. If you want the previous behavior of
+comparing with the next window, customize the new option
+`compare-windows-get-window-function' to the value
+`compare-windows-get-next-window'.
+---
*** Two new faces `compare-windows-removed' and `compare-windows-added'
-replace the obsolete face `compare-windows'.
+replace the face `compare-windows', which is now an obsolete alias for
+`compare-windows-added'.
+
+---
+*** The VC state indicator in the mode line now has different faces
+corresponding to each of the possible states. See the `vc-faces'
+customization group.
---
*** `log-edit-insert-changelog' converts "(tiny change)" to
"Copyright-paperwork-exempt: yes". Set `log-edit-rewrite-tiny-change'
nil to disable this.
-** VHDL mode supports VHDL'08.
+---
+** VHDL mode now supports VHDL'08.
+
+** Calculator
+
+---
+*** Decimal display mode uses "," groups, so it's more
+fitting for use in money calculations
-** Calculator: decimal display mode uses "," groups, so it's more
-fitting for use in money calculations; factorial works with
-non-integer inputs.
+---
+*** Factorial works with non-integer inputs.
-** HideIfDef mode now support full C/C++ expressions, argumented macro expansions,
-interactive macro evaluation and automatic scanning of #defined symbols.
+** Hide-IfDef mode
-*** New custom variable `hide-ifdef-header-regexp' to define C/C++ header file
-name patterns. Default case-insensitive .h, .hh, .hpp, .hxx, and .h++.
+---
+*** Hide-IfDef mode now support full C/C++ expressions in macros,
+macro argument expansion, interactive macro evaluation and automatic
+scanning of #define'd symbols.
+
+---
+*** New command `hif-evaluate-macro', bound to `C-c @ e', displays the
+result of evaluating a macro.
+
+---
+*** New command `hif-clear-all-ifdef-define', bound to `C-c @ C', clears
+all defined symbols in `hide-ifdef-env'.
+
+---
+*** New custom variable `hide-ifdef-header-regexp' to define C/C++ header
+file name patterns. Defaults to files whose extension is one of `.h',
+`.hh', `.hpp', `.hxx', or `.h++', matched case-insensitively.
+
+---
*** New custom variable `hide-ifdef-expand-reinclusion-protection' to prevent
-reinclusion protected header files from being fully hidden.
+reinclusion protected (a.k.a. "idempotent") header files from being hidden.
+(This could happen when an idempotent header file is visited again,
+when its guard symbol is already defined.) Defaults to `t'.
+
+---
*** New custom variable `hide-ifdef-exclude-define-regexp' to define symbol
-name patterns (e.g. all "FOR_DOXYGEN_ONLY_*") to be excluded.
+name patterns (e.g. all "FOR_DOXYGEN_ONLY_*") to be ignored when
+looking for macro definitions. By default, no symbols are ignored.
** TeX mode
++++
*** New custom variable `tex-print-file-extension' to help users who
use PDF instead of DVI.
++++
*** TeX mode now supports Prettify Symbols mode. When enabling
`prettify-symbols-mode' in a tex-mode buffer, \alpha ... \omega, and
many other math macros are displayed using unicode characters.
-** whitespace-mode: new 'big-indent style highlighting too much indentation.
-By default, 32 spaces and four TABs are considered to be too much but
-`whitespace-big-indent-regexp' can be configured to change that.
++++
+** New `big-indent' style in `whitespace-mode' highlights deep indentation.
+By default, 32 consecutive spaces or four consecutive TABs are
+considered to be too deep, but the new variable
+`whitespace-big-indent-regexp' can be customized to change that.
-** tildify: `tildify-space-string', `tildify-pattern', and
-`tildify-foreach-region-function' variables added making
+---
+** New options in `tildify-mode'.
+New options `tildify-space-string', `tildify-pattern', and
+`tildify-foreach-region-function' variables make
`tildify-string-alist', `tildify-pattern-alist', and
`tildify-ignored-environments-alist' variables (as well as a few
helper functions) obsolete.
-** xref
-The new package provides generic framework and new commands to find
-and move to definitions, as well as pop back to the original location.
++++
+** New package Xref replaces Etags's front-end and UI
+
+The new package Xref provides a generic framework and new commands to
+find and move to definitions of functions, macros, data structures
+etc., as well as go back to the location where you were before moving
+to a definition. It supersedes and obsoletes many Etags commands,
+while still using the etags.el code that reads the TAGS tables as one
+of its back-ends.
+
+The command `xref-find-definitions' replaces `find-tag' and provides
+an interface to pick one definition among several.
+`tags-loop-continue' is now unbound. `xref-pop-marker-stack' replaces
+`pop-tag-mark', but has a keybinding (`M-,') different from the one
+`pop-tag-mark' used.
-*** New key bindings
-`xref-find-definitions' replaces `find-tag' and provides an interface
-to pick one destination among several. Hence, `tags-loop-continue' is
-unbound. `xref-pop-marker-stack' replaces `pop-tag-mark', but uses an
-easier binding, which is now unoccupied (`M-,').
`xref-find-definitions-other-window' replaces `find-tag-other-window'.
`xref-find-definitions-other-frame' replaces `find-tag-other-frame'.
`xref-find-apropos' replaces `find-tag-regexp'.
+As a result of this, the following commands are now obsolete:
+`find-tag-other-window', `find-tag-other-frame', `find-tag-regexp',
+`tags-apropos'.
+
+`tags-loop-continue' is not obsolete because it's still useful in
+`tags-search' and `tags-query-replace', for which there are no direct
+replacements yet.
+
++++
+*** Variants of `tags-search' and `tags-query-replace' in Dired were also
+replaced by xref-style commands, see the "Dired" section below.
+
++++
*** New variables
+
`find-tag-marker-ring-length' is now an obsolete alias for
`xref-marker-ring-length'. `find-tag-marker-ring' is now an obsolete
alias for a private variable. `xref-push-marker-stack' and
-`xref-pop-marker-stack' should be used to mutate it instead.
+`xref-pop-marker-stack' should be used instead to manipulate the stack
+of searches for definitions.
---
*** `xref-find-definitions' and `describe-function' now display
information about mode local overrides (defined by cedet/mode-local.el
`define-overloadable-function' `define-mode-local-overrides').
-** etags
-As a result of the above, these commands are now obsolete:
-`find-tag-other-window', `find-tag-other-frame', `find-tag-regexp',
-`tags-apropos' and `tags-loop-continue'.
+The framework's Lisp API is still experimental and can change in major,
+backward-incompatible ways.
+
+---
+** New package Project
+
+The new package Project provides generic infrastructure for dealing
+with projects. The main commands included in it are
+`project-find-file' and `project-find-regexp'.
+
+The Lisp API of this package is still experimental.
** EUDC
EUDC's LDAP backend has been improved.
++++
*** EUDC supports LDAP-over-SSL URLs (ldaps://).
+---
*** EUDC passes LDAP passwords through a pipe to the ldapsearch
subprocess instead of on the command line.
+---
*** EUDC handles LDAP wildcards automatically so the user shouldn't
need to configure this manually anymore.
++++
*** The LDAP configuration section of EUDC's manual has been
rewritten.
There have also been customization changes.
++++
*** New custom variable `eudc-server-hotlist' to allow specifying
multiple EUDC servers in init file.
++++
*** Custom variable `eudc-inline-query-format' defaults to completing
on email and firstname instead of surname.
+---
*** Custom variable `eudc-expansion-overwrites-query' defaults to nil
to avoid interfering with the kill ring.
++++
*** Custom variable `eudc-inline-expansion-format' defaults to
"Firstname Surname <mail-address>".
++++
*** Custom variable `eudc-options-file' defaults to
"~/.emacs.d/eudc-options".
+---
*** New custom variable `ldap-ldapsearch-password-prompt-regexp' to
allow overriding the regular expression that recognizes the ldapsearch
command line's password prompt.
+---
EUDC's BBDB backend now supports BBDB 3.
+---
EUDC's PH backend (eudcb-ph.el) is obsolete.
** Eshell
*** The new built-in command `clear' can scroll window contents out of sight.
If provided with an optional non-nil argument, the scrollback contents will be cleared.
++++
*** New buffer syntax '#<buffer-name>', which is equivalent to
'#<buffer buffer-name>'. This shorthand makes interacting with
buffers from eshell more convenient. Custom variable
`eshell-buffer-shorthand', which has been broken for a while, has been
removed.
++++
*** By default, eshell "visual" program buffers (created by
`eshell-visual-commands' and similar custom vars) are no longer killed
when their processes die. This fixes issues with short-lived commands
** Browse-url
+---
+*** Support for the Google Chrome web browser.
+
+---
*** Support for the Conkeror web browser.
---
** File Notifications
++++
+*** The kqueue library is integrated for *BSD and Mac OS X machines.
+
+++
*** The new event `stopped' signals, that a file notification watch is
not active any longer.
compression command is determined from the new
`dired-compress-files-alist' variable.
++++
+*** `W' is now bound to `browse-url-of-dired-file', and is useful for
+viewing HTML files and the like.
+
+*** New user interface for the `A' and `Q' commands.
+These keys, now bound to `dired-do-find-regexp' and
+`dired-do-find-regexp-and-replace', work similarly to `xref-find-apropos'
+and `xref-query-replace-in-results': they present the matches
+in the `*xref*' buffer and let you move through the matches. No need
+to use `tags-loop-continue' to resume the search or replace loop. The
+previous commands, `dired-do-search' and
+`dired-do-query-replace-regexp', are still available, but not bound to
+keys; rebind `A' and `Q' to invoke them if you want the old behavior
+back. We intend to obsolete the old commands in a future release.
+
** Tabulated List Mode
+++
---
*** gulp.el
+---
*** landmark.el (moved to elpa.gnu.org)
\f
* New Modes and Packages in Emacs 25.1
+---
** pinentry.el allows GnuPG passphrase to be prompted through the
minibuffer instead of a graphical dialog, depending on whether the gpg
command is called from Emacs (i.e., INSIDE_EMACS environment variable
is set). This feature requires newer versions of GnuPG (2.1.5 or
later) and Pinentry (0.9.5 or later).
++++
** cl-generic.el provides CLOS-style multiple-dispatch generic functions.
+The main entry points are `cl-defgeneric' and `cl-defmethod'. See the
+node "Generic Functions" in the Emacs Lisp manual for more details.
-** scss-mode (a minor variant of css-mode)
+---
+** scss-mode (a minor variant of css-mode) is a major mode for editing
+SCSS (Sassy CSS) files.
+---
** let-alist is a new macro (and a package) that allows one to easily
let-bind the values stored in an alist.
-** `tildify-mode' allows to automatically insert hard spaces as one
+---
+** `tildify-mode' allows automatic insertion of hard spaces as one
types the text. Breaking line after a single-character words is
forbidden by Czech and Polish typography (and may be discouraged in
other languages), so `auto-tildify-mode' makes it easier to create
a typographically-correct documents.
+---
** The `seq' library adds sequence manipulation functions and macros
that complement basic functions provided by subr.el. All functions
are prefixed with `seq-' and work on lists, strings and vectors.
+`pcase' accepts a new Upattern `seq'.
+---
** The `map' library provides map-manipulation functions that work on
alists, hash-table and arrays. All functions are prefixed with
-`map-'.
+`map-'. `pcase' accepts a new UPattern `map'.
+---
** The `thunk' library provides functions and macros to control the
evaluation of forms.
+---
** js-jsx-mode (a minor variant of js-mode) provides indentation
support for JSX, an XML-like syntax extension to ECMAScript.
last variable when there was an odd number of arguments has been
eliminated.
++++
** `syntax-begin-function' is declared obsolete.
Removed font-lock-beginning-of-syntax-function and the SYNTAX-BEGIN
slot in font-lock-defaults.
`package-enable-at-startup' to t after the call to
`package-initialize'.
+---
** `:global' minor mode use `setq-default' rather than `setq'.
This means that you can't use `make-local-variable' and expect them to
"magically" become buffer-local.
-** `inhibit-point-motion-hooks' now defaults to t and is obsolete.
-
+++
** `track-mouse' no longer freezes the shape of the mouse pointer.
The `track-mouse' form no longer refrains from changing the shape of
has any effect. (This change was made in Emacs 24.4 but was not
advertised at the time.)
++++
** `indirect-function' does not signal `void-function' any more.
This is mostly a bug-fix, since this change was missed back in 24.4 when
symbol-function was changed not to signal `void-function' any more.
++++
*** As a consequence, the second arg of `indirect-function' is now obsolete.
++++
** Comint, term, and compile do not set the EMACS env var any more.
Use the INSIDE_EMACS environment variable instead.
++++
** `save-excursion' does not save&restore the mark any more.
+Use `save-mark-and-excursion' if you want the old behavior.
-** read-buffer-function can now be called with a 4th argument (`predicate').
++++
+** `read-buffer' and `read-buffer-function' can now be called with a 4th
+argument (`predicate').
-** completion-table-dynamic stays in the minibuffer.
++++
+** `completion-table-dynamic' by default stays in the minibuffer.
+The minibuffer will be the current buffer when the function is called.
If you want the old behavior of calling the function in the buffer
-from which the minibuffer was entered, call it with the new argument
-`switch-buffer'.
+from which the minibuffer was entered, use the new argument
+`switch-buffer' to `completion-table-dynamic'.
+---
** window-configurations no longer record the buffers' marks.
+---
** inhibit-modification-hooks now also inhibits lock-file checks, as well as
active region handling.
++++
** deactivate-mark is now buffer-local.
++++
** `cl-the' now asserts that its argument is of the given type.
-** `process-running-child-p` may now return a numeric process
++++
+** `process-running-child-p' may now return a numeric process
group ID instead of `t'.
+++
any reference to a buffer position. The 6th member of the mouse
position list returned for such events is now nil.
+---
** Menu items in keymaps do not support the "key shortcut cache" any more.
These slots used to hold key-shortcut data, but have been obsolete since
Emacs-21.
+---
** Emacs no longer downcases the first letter of a system diagnostic
when signaling a file error. For example, it now reports "Permission
denied" instead of "permission denied". The old behavior was problematic
** The `diff' command uses the unified format now. To restore the old
behavior, set `diff-switches' to `-c'.
+---
** `grep-template' and `grep-find-template' values don't include the
--color argument anymore. It's added at the <C> place holder position
dynamically. Any third-party code that changes these templates should
* Lisp Changes in Emacs 25.1
** pcase
-*** New UPatterns `quote', `app', `cl-struct', `eieio', `seq', and `map'.
++++
+*** New UPatterns `quote', `app'.
++++
*** New UPatterns can be defined with `pcase-defmacro'.
+++
*** New vector QPattern.
+---
** syntax-propertize is now automatically called on-demand during forward
parsing functions like `forward-sexp'.
-** New hooks prefix-command-echo-keystrokes-functions and
-prefix-command-preserve-state-hook, to allow the definition of prefix
-commands other than the predefined C-u.
++++
+** New hooks `prefix-command-echo-keystrokes-functions' and
+`prefix-command-preserve-state-hook' allow the definition of prefix
+commands other than the predefined `C-u'.
++++
** New functions `filepos-to-bufferpos' and `bufferpos-to-filepos'.
+These allow conversion between buffer positions and the corresponding
+file byte offsets, given the file's encoding.
++++
** The default value of `load-read-function' is now `read'.
+Previously, the default value of `nil' implied using `read'.
-** New hook `pre-redisplay-functions', a bit easier to use than pre-redisplay-function.
++++
+** New hook `pre-redisplay-functions'.
+It is a bit easier to use than `pre-redisplay-function'.
++++
** The second arg of `looking-back' should always be provided explicitly.
+Previously, it was an optional argument, now it's mandatory.
-** Obsolete text properties `intangible', `point-entered', and `point-left'.
++++
+** Text properties `intangible', `point-entered', and `point-left' are obsolete.
Replaced by properties `cursor-intangible' and `cursor-sensor-functions',
implemented by the new `cursor-intangible-mode' and
`cursor-sensor-mode' minor modes.
++++
+** `inhibit-point-motion-hooks' now defaults to `t' and is obsolete.
+Use the new minor modes `cursor-intangible-mode' and
+`cursor-sensor-mode' instead.
+
++++
** New process type `pipe', which can be used in combination with the
`:stderr' keyword of make-process to handle standard error output
of subprocess.
++++
** New function `make-process' provides an alternative interface to
`start-process'. It allows programs to set process parameters such as
process filter, sentinel, etc., through keyword arguments (similar to
+++
** New variable `inhibit-message', when bound to non-nil, inhibits
-`message' and related functions from displaying messages the Echo
-Area. The output is still logged to the *Messages* buffer.
+`message' and related functions from displaying messages in the echo
+area. The output is still logged to the *Messages* buffer.
+++
** A new text property `inhibit-read-only' can be used in read-only
buffers to allow certain parts of the text to be writable.
+++
-** New macro `define-advice'.
+** A new variable `comment-end-can-be-escaped' is useful in languages
+ such as C and C++ where line comments with escaped newlines are
+ continued to the next line.
-** `read-buffer' takes a new `predicate' argument.
++++
+** New macro `define-advice'.
++++
** Emacs Lisp now supports generators.
+See the "Generators" section of the ELisp manual for the details.
-** New finalizer facility for running code when objects
- become unreachable.
++++
+** New finalizer facility for running code when objects become unreachable.
+See the "Finalizer Type" subsection in the ELisp manual for the
+details.
-** lexical closures can use (:documentation <form>) to build their docstring.
-It should be placed right where the docstring would be, and <form> is then
+---
+** lexical closures can use (:documentation FORM) to build their docstring.
+It should be placed right where the docstring would be, and FORM is then
evaluated (and should return a string) when the closure is built.
++++
** define-inline provides a new way to define inlinable functions.
-** New function `macroexpand-1' to perform a single step of macroexpansion.
++++
+** New function `macroexpand-1' to perform a single step of macro expansion.
-** Some "x-*" were obsoleted:
++++
+** Some "x-*" functions were obsoleted and/or renamed:
*** x-select-text is renamed gui-select-text.
*** x-selection-value is renamed gui-selection-value.
*** x-get-selection is renamed gui-get-selection.
*** x-get-selection-value is renamed to gui-get-primary-selection.
*** x-set-selection is renamed to gui-set-selection
++++
** New function `string-greaterp', which return the opposite result of
`string-lessp'.
---
*** The ls-lisp package uses `string-collate-lessp' to sort file names.
-If you want the old, locale-independent sorting, customize the new
-option `ls-lisp-use-string-collate' to a nil value.
+The effect is that, on systems that use ls-lisp for Dired, the default
+sort order of the files in Dired is now different from what it was in
+previous versions of Emacs. In particular, the file names are sorted
+disregarding punctuation, accents, and diacritics, and letter case is
+ignored. For example, files whose name begin with a period will no
+longer appear near the beginning of the directory listing. If you
+want the old, locale-independent sorting, customize the new option
+`ls-lisp-use-string-collate' to the nil value.
+++
*** The MS-Windows specific variable `w32-collate-ignore-punctuation',
codeset is "UTF-8" (as in "en_US.UTF-8"). This is needed because
MS-Windows doesn't support UTF-8 as codeset in its locales.
++++
** New function `alist-get', which is also a valid place (aka lvalue).
++++
** New function `funcall-interactively', which works like `funcall'
but makes `called-interactively-p' treat the function as (you guessed it)
called interactively.
++++
** New function `function-put' to use instead of `put' for function properties.
+++
-** The new function `bidi-find-overridden-directionality' allows to
+** The new function `bidi-find-overridden-directionality' allows you to
find characters whose directionality was, perhaps maliciously,
overridden by directional override control characters. Lisp programs
can use this to detect potential phishing of URLs and other links that
exploits bidirectional display reordering.
+++
-** The new function `buffer-substring-with-bidi-context' allows to
+** The new function `buffer-substring-with-bidi-context' allows you to
copy a portion of a buffer into a different location while preserving
the visual appearance both of the copied text and the text at
destination, even when the copied text includes mixed bidirectional
** New macro `with-file-modes', for evaluating expressions with default file
permissions set to temporary values (e.g., for creating private files).
++++
** You can access the slots of structures using `cl-struct-slot-value'.
++++
** Function `sort' can deal with vectors.
+---
** Function `system-name' now returns an updated value if the current
system's name has changed or if the Emacs process has changed systems,
and to avoid long waits it no longer consults DNS to canonicalize the
+++
** Function `write-region' no longer outputs "Wrote FILE" in batch mode.
+---
** If `pwd' is called with a prefix argument, insert the current default
directory at point.
integers.
+++
-** New function `set-binary-mode' allows to switch a standard stream
+** New function `set-binary-mode' allows switching a standard stream
of the Emacs process to binary I/O mode.
+++
the name is a directory separator character (forward slash on GNU and
Unix systems, forward- or backslash on MS-Windows and MS-DOS).
+---
** ASCII approximations to curved quotes are put in standard-display-table
if the terminal cannot display curved quotes.
++++
** Standard output and error streams now transliterate characters via
standard-display-table, and encode output using locale-coding-system.
+To force a specific encoding, bind `coding-system-for-write' to the
+coding-system of your choice when invoking functions like `prin1' and
+`message'.
+++
** New var `truncate-string-ellipsis' to choose how to indicate truncation.
** Miscellaneous name change
+---
For consistency with the usual Emacs spelling, the Lisp variable
`hfy-optimisations' has been renamed to `hfy-optimizations'.
The old name should still work, as an obsolescent alias.
-\f
-* Changes in Frames and Windows Code in Emacs 25.1
+** Changes in Frame- and Window- Handling
+++
-** Emacs can now draw horizontal scroll bars on some platforms that
+*** Emacs can now draw horizontal scroll bars on some platforms that
provide toolkit scroll bars, namely Gtk+, Lucid, Motif and Windows.
Horizontal scroll bars are turned off by default.
-*** New function `horizontal-scroll-bars-available-p' telling whether
+
+**** New function `horizontal-scroll-bars-available-p' telling whether
horizontal scroll bars are available on the underlying system.
-*** New mode `horizontal-scroll-bar-mode' to toggle horizontal scroll
+
+**** New mode `horizontal-scroll-bar-mode' to toggle horizontal scroll
bars on all existing and future frames.
-*** New function `toggle-horizontal-scroll-bar' to toggle horizontal
+
+**** New function `toggle-horizontal-scroll-bar' to toggle horizontal
scroll bars on the selected frame.
-*** New frame parameters `horizontal-scroll-bars' and
+
+**** New frame parameters `horizontal-scroll-bars' and
`scroll-bar-height' to set horizontal scroll bars and their height
for individual frames and in `default-frame-alist'.
-*** New functions `frame-scroll-bar-height' and
+
+**** New functions `frame-scroll-bar-height' and
`window-scroll-bar-height' return the height of horizontal scroll
bars on a specific frame or window.
-*** `set-window-scroll-bars' now accepts five parameters where the last
+
+**** `set-window-scroll-bars' now accepts five parameters where the last
two specify height and type of the window's horizontal scroll bar.
-*** `window-scroll-bars' now returns type and sizes of horizontal scroll
+
+**** `window-scroll-bars' now returns type and sizes of horizontal scroll
bars too.
-*** New buffer-local variables `horizontal-scroll-bar' and
+
+**** New buffer-local variables `horizontal-scroll-bar' and
`scroll-bar-height'.
+++
-** New functions `frame-geometry' and `frame-edges' give access to a
+*** New functions `frame-geometry' and `frame-edges' give access to a
frame's geometry.
+++
-** New functions `mouse-absolute-pixel-position' and
+*** New functions `mouse-absolute-pixel-position' and
`set-mouse-absolute-pixel-position' get/set screen coordinates of the
mouse cursor.
+++
-** The function `window-edges' now accepts three additional arguments to
+*** The function `window-edges' now accepts three additional arguments to
retrieve body, absolute and pixel edges of the window.
+++
-** The functions `window-inside-edges', `window-inside-pixel-edges' and
+*** The functions `window-inside-edges', `window-inside-pixel-edges' and
`window-inside-absolute-pixel-edges' have been renamed to respectively
`window-body-edges', `window-body-pixel-edges' and
`window-absolute-body-pixel-edges'. The old names are kept as aliases.
+++
-** New function `window-absolute-pixel-position' to get the screen
+*** New function `window-absolute-pixel-position' to get the screen
coordinates of a visible buffer position.
+++
-** The height of a frame's menu and tool bar are no longer counted in the
+*** The height of a frame's menu and tool bar are no longer counted in the
frame's text height. This means that the text height stands only for
the height of the frame's root window plus that of the echo area (if
present). This was already the behavior for frames with external tool
builds.
+++
-** Frames now do not necessarily preserve the number of columns or lines
+*** Frames now do not necessarily preserve the number of columns or lines
they display when setting default font, menu bar, fringe width, or
scroll bars. In particular, maximized and fullscreen frames are
conceptually never resized if such settings change. For fullheight and
fullwidth frames, the behavior may depend on the toolkit used.
-*** New option `frame-inhibit-implied-resize' if non-nil, means that
+**** New option `frame-inhibit-implied-resize' if non-nil, means that
setting default font, menu bar, fringe width, or scroll bars of a
specific frame does not resize that frame in order to preserve the
number of columns or lines it displays.
+++
-** New function `window-preserve-size' allows to preserve the size of
-windows without "fixing" it. It's supported by `fit-window-to-buffer',
+*** New function `window-preserve-size' allows you to preserve the size of
+a window without "fixing" it. It's supported by `fit-window-to-buffer',
`temp-buffer-resize-mode' and `display-buffer'.
+++
-** New `display-buffer' action function `display-buffer-use-some-frame'.
+*** New `display-buffer' action function `display-buffer-use-some-frame'.
This displays the buffer in an existing frame other than the current
frame, and allows the caller to specify a frame predicate to exclude
frames.
+++
-** New minor mode `window-divider-mode' and options
+*** New minor mode `window-divider-mode' and options
`window-divider-default-places', `window-divider-default-bottom-width'
and `window-divider-default-right-width'.
-** Tearoff menus and detachable toolbars for Gtk+ has been removed.
+---
+** Tearoff menus and detachable toolbars for Gtk+ have been removed.
Those features have been deprecated in Gtk+ for a long time.
** Etags
++++
*** etags no longer qualifies class members by default.
By default, `etags' will not qualify class members for C-like
(`xref-find-definitions'); if so, you can use `C-u M-.' to specify the
qualified names by hand.
++++
*** New language Ruby
-Names of modules, classes, methods, and functions are tagged.
-Overloaded operators are also tagged.
+Names of modules, classes, methods, functions, and constants are
+tagged. Overloaded operators are also tagged.
++++
+*** New language Go
+Names of packages, functions, and types are tagged.
+
++++
*** Improved support for Lua
Etags now tags functions even if the "function" keyword follows some
+++
** Emacs running on MS-Windows now supports the daemon mode.
+---
** The byte counts in etags-generated TAGS files are now the same on
MS-Windows as they are on other platforms.
** On OS X, configure creates a Cocoa ("Nextstep") build by default.
Pass '--without-ns' to configure to create an X11 build, the old default.
+---
** OS X 10.5 or older is no longer supported.
+---
** OS X on PowerPC is no longer supported.
---
** The new function 'w32-application-type' returns the type of an
MS-Windows application given the name of its executable program file.
+** New variable `w32-pipe-buffer-size'.
+It can be used to tune the size of the buffer of pipes created for
+communicating with subprocesses, when the program run by a subprocess
+exhibits unusual buffering behavior. Default is zero, which lets the
+OS use its default size.
+
\f
----------------------------------------------------------------------
This file is part of GNU Emacs.