This file is about changes in Emacs version 25.
+See file HISTORY for a list of GNU Emacs versions and release dates.
See files NEWS.24, NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
and NEWS.1-17 for changes in older Emacs versions.
+++
** Building Emacs now requires C99 or later.
++++
** Building Emacs now requires GNU make, version 3.81 or later.
++++
** New configure option --with-cairo.
-Maybe add text based on http://lists.gnu.org/archive/html/emacs-devel/2015-05/msg00689.html
+This builds Emacs with Cairo drawing. As a side effect, it provides
+support for built-in printing, when Emacs was built with GTK+.
** By default, Emacs no longer works on IRIX. We expect that Emacs
users are not affected by this, as SGI stopped supporting IRIX in
undumping code to GCC under IRIX, or by configuring --with-wide-int,
or by sticking with Emacs 24.4.
+** The Emacs garbage collector assumes GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS.
+The GC_MAKE_GCPROS_NOOPS stack-marking variant has been the default
+since Emacs 24.4, and the other variants were undocumented and were
+obstacles to maintenance and development. GC_MARK_STACK and its
+related symbols have been removed from the C internals.
+
** 'configure' now prefers gnustep-config when configuring GNUstep.
If gnustep-config is not available, the old heuristics are used.
+---
+** 'configure' now prefers inotify to gfile for file notification,
+unless gfile is explicitly requested via --with-file-notification='gfile'.
+
---
** The configure option '--with-pkg-config-prog' has been removed.
Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to.
It has no particular connection to Emacs and has not changed in years,
so if you want to use it, you can always take a copy from an older Emacs.
+** Emacs 25 comes with a new set of icons.
+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.
+
\f
* Startup Changes in Emacs 25.1
and *Buffer List*. This makes Emacs convenient to use from the
command line when `initial-buffer-choice' is non-nil.
++++
+** The value of ‘initial-scratch-message’ is now treated as a doc string
+and can contain escape sequences for command keys, quotes, and the like.
+
\f
* Changes in Emacs 25.1
+** Any file of the form .dir-locals*.el is now considered a dir-local
+ file, and multiple can be used in the same directory. See the
+ variable `dir-locals-file' for more information.
+** `xref-find-definitions' and `describe-function' now display
+ information about mode local overrides (defined by
+ cedet/mode-local.el `define-overloadable-function' and
+ `define-mode-local-overrides').
+
+** 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 doc command `describe-symbol'. Works for functions, vars, faces, etc...
+
+** New user option `search-default-regexp-mode' specifies the default mode for isearch
+
+** `isearch' and `query-replace' now perform character folding in matches.
+This is analogous to case-folding, but applies between Unicode
+characters and their ASCII counterparts. This means many characters
+will match entire groups of characters.
+
+For instance, the " will match all variants of unicode double quotes
+(like “ and ”), and the letter a will match all of its accented
+cousins, even those composed of multiple characters, as well as many
+other symbols like ℀, ℁, ⒜, and ⓐ.
+
+** New function `character-fold-to-regexp' can be used
+by searching commands to produce a regexp matching anything that
+character-folds into STRING.
+
+** New command `checkdoc-package-keywords' checks if the
+current package keywords are recognized. Set the new option
+`checkdoc-package-keywords-flag' to non-nil to make
+`checkdoc-current-buffer' call this function automatically.
+
+** New function `checkdoc-file' checks for style errors.
+It's meant for use together with `compile':
+emacs -batch --eval "(checkdoc-file \"subr.el\")"
+
** New command `comment-line' bound to `C-x C-;'.
** New function `custom-prompt-customize-unsaved-options' checks for
** C-x 8 now has shorthands for these chars: ‐ ‑ ‒ – — ― ‘ ’ “ ” † ‡ • ′ ″
€ № ← → ↔ − ≈ ≠ ≤ ≥. As before, you can type C-x 8 C-h to list shorthands.
-** New minor mode electric-quote-mode for quoting ‘like this’ and “like this”.
+** New minor mode electric-quote-mode for quoting ‘like this’ and “like this”
+as you type. See also the new variable ‘text-quoting-style’.
** New minor mode global-eldoc-mode is enabled by default.
** Emacs now supports the latest version of the UBA.
The Emacs implementation of the Unicode Bidirectional Algorithm (UBA)
was updated to support all the latest additions and changes introduced
-in Unicode Standard versions 6.3 and 7.0, and a few changes suggested
-for Unicode 8.0. This includes full support for directional isolates
-and the Bidirectional Parentheses Algorithm (BPA) specified by these
-Unicode standards.
+in Unicode Standard versions 6.3, 7.0, and the latest Unicode 8.0.
+This includes full support for directional isolates and the
+Bidirectional Parentheses Algorithm (BPA) specified by these Unicode
+standards.
** You can access `mouse-buffer-menu' (C-down-mouse-1) using C-f10.
\f
* Changes in Specialized Modes and Packages in Emacs 25.1
+** 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.
+
+** JSON
+---
+*** `json-pretty-print' and `json-pretty-print-buffer' now maintain
+the ordering of object keys by default.
+---
+*** New commands `json-pretty-print-ordered' and
+`json-pretty-print-buffer-ordered' pretty prints JSON objects with
+object keys sorted alphabetically.
+
+** You can recompute the VC state of a file buffer with `M-x vc-refresh-state'
+** Prog mode has some support for multi-mode indentation.
+See `prog-indentation-context' and `prog-widen'.
+
+** Prettify Symbols mode
+*** Prettify Symbols mode supports custom composition predicates. By
+overriding the default `prettify-symbols-compose-predicate', modes can
+specify in which contexts a symbol map be composed to some unicode
+character. `prettify-symbols-default-compose-p' is the default which
+is suitable for most programming languages such as C or Lisp (but not
+(La)TeX).
+
+*** Symbols can be unprettified while point is inside them.
+New variable `prettify-symbols-unprettify-at-point' configures this.
+
** New `xterm-screen-extra-capabilities' config.
** The `save-place' variable is replaced by a `save-place-mode'.
** ERC
-*** Hide message types by network or channel. `erc-hide-list' will
+*** Hide message types by network or channel. `erc-hide-list' will
hide all messages of the specified type, where `erc-network-hide-list'
and `erc-channel-hide-list' will only hide the specified message types
for the respective specified targets.
*** If a package is available on multiple archives and one has higher
priority (as per `package-archive-priorities') only that one is
-listed. This can be configured with `package-menu-hide-low-priority'.
+listed. This can be configured with `package-menu-hide-low-priority'.
-*** `package-menu-hide-obsolete' now toggles the hiding of packages.
+*** `package-menu-toggle-hiding' now toggles the hiding of packages.
This includes the above-mentioned low-priority packages, as well as
available packages whose version is lower than the currently installed
version (which were previously impossible to display).
*** New custom variable `package-selected-packages' tracks packages
which were installed by the user (as opposed to installed as
-dependencies). This variable can also be manually customized.
+dependencies). This variable can also be manually customized.
*** New command `package-install-user-selected-packages' installs all
packages from `package-selected-packages' which are currently missing.
(add-to-list 'display-buffer-alist
'("^\\*shell\\*$" . (display-buffer-same-window))).
-
** EIEIO
+++
*** The `:protection' slot option is not obeyed any more.
*** New command `ido-bury-buffer-at-head' bound to C-S-b
Bury the buffer at the head of `ido-matches', analogous to how C-k
kills the buffer at head.
+*** A prefix argument to `ido-restrict-to-matches' will reverse its
+meaning, and the list is restricted to those elements that do not
+match the current input.
** Minibuffer
*** If `quick-calc' is called with a prefix argument, insert the
result of the calculation into the current buffer.
++++
+** In Edebug, you can now set the initial mode with C-x C-a C-m. With
+this you can tell Edebug not to stop at the start of the first
+instrumented function.
+
** ElDoc
*** New minor mode `global-eldoc-mode'
*** `eldoc-documentation-function' now defaults to `ignore'
** cl-lib
*** New functions cl-fresh-line, cl-digit-char-p and cl-parse-integer.
-** seq
-*** New seq library:
-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.
-
** Calendar and diary
++++
+*** The default `diary-file' is now located in .emacs.d.
+
+++
*** New commands to insert diary entries with Chinese dates:
`diary-chinese-insert-anniversary-entry' `diary-chinese-insert-entry'
*** The option `calendar-mode-line-format' can now be nil,
which means to do nothing special with the mode line in calendars.
++++
+*** New option `calendar-weekend-days'.
+The option customizes which day headers receive the
+`calendar-weekend-header' face.
+
+---
+*** New optional args N and STRING for ‘holiday-greek-orthodox-easter’.
+
---
*** Many items obsolete since at least version 23.1 have been removed.
The majority were function/variable/face aliases, too numerous to list here.
** SES now supports local printer functions; see `ses-define-local-printer'.
-** In sh-mode, you can now use `sh-shell' as a file-local variable to
+** sh-script
+*** In sh-mode you can now use `sh-shell' as a file-local variable to
specify the type of shell in use (bash, csh, etc).
+*** New value `always' for sh-indent-after-continuation.
+This provides old-style ("dumb") indentation of continued lines.
+
** TLS
---
*** Fatal TLS errors are now silent by default.
** Tramp
++++
+*** New connection method "afp", which allows to access Mac OS X
+volumes via the Apple Filing Protocol.
+
++++
*** New connection method "nc", which allows to access dumb busyboxes.
++++
+*** Method-specific parameters can be overwritten now with variable
+`tramp-connection-properties'.
+
+---
+*** Handler for `file-notify-valid-p' for remote machines that support
+filesystem notifications.
+
** SQL mode
*** New user variable `sql-default-directory' enables remote
interactive macro evaluation and automatic scanning of #defined symbols.
*** New custom variable `hide-ifdef-header-regexp' to define C/C++ header file
-name patterns. Default case-insensitive .h, .hh, .hpp and .hxx.
+name patterns. Default case-insensitive .h, .hh, .hpp, .hxx, and .h++.
*** New custom variable `hide-ifdef-expand-reinclusion-protection' to prevent
reinclusion protected header files from being fully hidden.
*** New custom variable `hide-ifdef-exclude-define-regexp' to define symbol
-name patterns (e.x. all "FOR_DOXYGEN_ONLY_*") to be excluded.
+name patterns (e.g. all "FOR_DOXYGEN_ONLY_*") to be excluded.
** 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.
** tar-mode: new `tar-new-entry' command, allowing for new members to
be added to the archive.
+---
** Autorevert: dired buffers are also auto-reverted via file
notifications, if Emacs is compiled with file notification support.
+** File Notifications
+
++++
+*** The new event `stopped' signals, that a file notification watch is
+not active any longer.
+
++++
+*** The new function `file-notify-valid-p' checks, whether a file
+notification descriptor still corresponds to an activate watch.
+
+** Dired
+
++++
+*** The command `dired-do-compress' bound to `Z' now can compress
+directories and decompress zip files.
+
++++
+*** New command `dired-do-compress-to' bound to `c' can be used to
+compress many marked files into a single named archive. The
+compression command is determined from the new
+`dired-compress-files-alist' variable.
+
** Obsolete packages
---
*** gulp.el
-+++
-** The character classes [:graph:] and [:print:] in regular expressions
-no longer match every multibyte character. Instead, Emacs now
-consults the Unicode character properties to determine which
-characters are graphic or printable. In particular, surrogates and
-unassigned codepoints are now rejected. If you want the old behavior,
-use [:multibyte:] instead.
+*** 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.
** scss-mode (a minor variant of css-mode)
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.
+
+** The `map' library provides map-manipulation functions that work on
+alists, hash-table and arrays. All functions are prefixed with
+`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.
+
\f
* Incompatible Lisp Changes in Emacs 25.1
+** `syntax-begin-function' is declared obsolete.
+Removed font-lock-beginning-of-syntax-function and the SYNTAX-BEGIN
+slot in font-lock-defaults.
+
++++
+** `package-initialize' now sets `package-enable-at-startup' to nil if
+called during startup. Users who call this function in their init
+file and still expect it to be run after startup should set
+`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
+the mouse pointer for the entire time the body of that form is
+executed. Lisp programs that use `track-mouse' for dragging across
+large portions of the Emacs display, and want to avoid changes in the
+pointer shape during dragging, should bind the variable `track-mouse'
+to the special value `dragging' in the body of the form.
+
** The optional `predicate' argument of `lisp-complete-symbol' no longer
has any effect. (This change was made in Emacs 24.4 but was not
advertised at the time.)
denied" instead of "permission denied". The old behavior was problematic
in languages like German where downcasing rules depend on grammar.
-** (substitute-command-keys "`foo'") now returns "‘foo’".
-That is, it replaces grave accents by left single quotation marks, and
-apostrophes that match grave accents by right single quotation marks.
-As before, isolated apostrophes and characters preceded by \= are
-output as-is.
++++
+** New variable ‘text-quoting-style’ to control how Emacs translates quotes.
+Set it to ‘curve’ for curved single quotes ‘like this’, to ‘straight’
+for straight apostrophes 'like this', and to ‘grave’ for grave accent
+and apostrophe `like this'. The default value nil acts like ‘curve’
+if curved single quotes are displayable, and like ‘grave’ otherwise.
+The new variable affects display of diagnostics and help, but not of info.
+
++++
+** substitute-command-keys now replaces quotes.
+That is, it converts documentation strings’ quoting style as per the
+value of ‘text-quoting-style’. Doc strings in source code can use
+either curved single quotes or grave accents and apostrophes. As
+before, characters preceded by \= are output as-is.
+
++++
+** Message-issuing functions ‘error’, ‘message’, etc. now convert quotes.
+They use the new ‘format-message’ function instead of plain ‘format’,
+so that they now follow user preference as per ‘text-quoting-style’
+when processing curved single quotes, grave accents, and apostrophes
+in their format argument.
+++
** The character classes [:alpha:] and [:alnum:] in regular expressions
If you want the old behavior where they matched any character with
word syntax, use `\sw' instead.
++++
+** The character classes [:graph:] and [:print:] in regular expressions
+no longer match every multibyte character. Instead, Emacs now
+consults the Unicode character properties to determine which
+characters are graphic or printable. In particular, surrogates and
+unassigned codepoints are now rejected. If you want the old behavior,
+use [:multibyte:] instead.
+
+++
** 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
+be updated accordingly.
+
++++
+** ‘(/ N)’ is now equivalent to ‘(/ 1 N)’ rather than to ‘(/ N 1)’.
+The new behavior is compatible with Common Lisp and with XEmacs.
+This change does not affect Lisp code intended to be portable to
+Emacs 24.2 and earlier, which did not support unary ‘/’.
+
++++
+** The `default-directory' value doesn't have to end slash. To make
+that happen, `unhandled-file-name-directory' now defaults to calling
+`file-name-as-directory'.
+
\f
* Lisp Changes in Emacs 25.1
+** 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 functions `filepos-to-bufferpos' and `bufferpos-to-filepos'.
+
** The default value of `load-read-function' is now `read'.
** New hook `pre-redisplay-functions', a bit easier to use than pre-redisplay-function.
** 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 macroexpansion.
** Some "x-*" were obsoleted:
*** x-select-text is renamed gui-select-text.
*** 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'.
+
** New function `alist-get', which is also a valid place (aka lvalue).
** New function `funcall-interactively', which works like `funcall'
*** New macros `thread-first' and `thread-last' allow threading a form
as the first or last argument of subsequent forms.
++++
** Documentation strings now support quoting with curved single quotes
‘like-this’ in addition to the old style with grave accent and
apostrophe `like-this'. The new style looks better on today's displays.
-When an old-style string is copied to a help buffer it is converted to
-the new style.
+In the new Electric Quote mode, you can enter curved single quotes
+into documentation by typing ` and '. Outside Electric Quote mode,
+you can enter them by typing ‘C-x 8 [’ and ‘C-x 8 ]’, or (if your Alt
+key works) by typing ‘A-[’ and ‘A-]’. As described above under
+‘text-quoting-style’, the user can specify how to display doc string
+quotes.
+
++++
+** New function ‘format-message’ is like ‘format’ and also converts
+curved single quotes, grave accents and apostrophes as per
+‘text-quoting-style’.
+
++++
+** show-help-function's arg is converted via substitute-command-keys
+before being passed to the function. Help strings, help-echo
+properties, etc. can therefore contain command key escapes and
+quotation marks.
+++
** Time-related changes:
+*** Time conversion functions now accept an optional ZONE argument
+that specifies the time zone rules for conversion. ZONE is omitted or
+nil for Emacs local time, t for Universal Time, ‘wall’ for system wall
+clock time, or a string as in ‘set-time-zone-rule’ for a time zone
+rule. The affected functions are ‘current-time-string’,
+‘current-time-zone’, ‘decode-time’, and ‘format-time-string’. The
+function ‘encode-time’, which already accepted a simple time zone rule
+argument, has been extended to accept all the new forms.
+
*** Time-related functions now consistently accept numbers
(representing seconds since the epoch) and nil (representing the
current time) as well as the usual list-of-integer representation.
** New function `set-binary-mode' allows to switch a standard stream
of the Emacs process to binary I/O mode.
-** In locales that cannot display curved quotes, ASCII approximations
-are installed in standard-display-table.
+** 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.
*** New buffer-local variables `horizontal-scroll-bar' and
`scroll-bar-height'.
++++
+** New functions `frame-geometry' and `frame-edges' give access to a
+frame's geometry.
+
++++
+** 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
+retrieve body, absolute and pixel edges of the window.
+
++++
+** 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
+coordinates of a visible buffer position.
+
+++
** 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
windows without "fixing" it. It's supported by `fit-window-to-buffer',
`temp-buffer-resize-mode' and `display-buffer'.
++++
+** New minor mode `window-divider-mode' and options
+`window-divider-default-places', `window-divider-default-bottom-width'
+and `window-divider-default-right-width'.
+
+++
** 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.
++++
+** The option `even-window-heights' has been renamed to
+`even-window-sizes' and now handles window widths as well.
+
** Tearoff menus and detachable toolbars for Gtk+ has been removed.
Those features have been deprecated in Gtk+ for a long time.
\f
* Changes in Emacs 25.1 on Non-Free Operating Systems
+---
+** MS-Windows specific Emacs build scripts are no longer in the distribution
+This includes the makefile.w32-in files in various subdirectories, and
+the support files. The file nt/configure.bat now just tells the user
+to use the procedure described in nt/INSTALL, by running the Posix
+`configure' script in the top-level directory.
+
---
** Building Emacs for MS-Windows requires at least Windows XP
or Windows Server 2003. The built binaries still run on all versions
** 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.
+
\f
----------------------------------------------------------------------
This file is part of GNU Emacs.