1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2012 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 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that the appropriate manual has already been updated.
19 --- means no change in the manuals is called for.
20 When you add a new item, please add it without either +++ or ---
21 so we will look at it and add it to the manual.
24 * Installation Changes in Emacs 24.4
26 ** Emacs can be compiled with POSIX ACL support.
27 This happens by default if a suitable support library is found at
28 build time, like libacl on GNU/Linux. To prevent this, use the
29 configure option `--without-acl'.
31 * Startup Changes in Emacs 24.4
32 * Changes in Emacs 24.4
35 ** `eval-defun' on an already defined defcustom calls the :set function,
38 ** The option `set-mark-default-inactive' has been deleted.
39 This unfinished feature was introduced by accident in Emacs 23.1;
40 simply disabling Transient Mark mode does the same thing.
42 ** ACL support has been added.
44 *** Emacs preserves the ACL entries of files when backing up.
46 *** New functions `file-acl' and `set-file-acl' get and set the ACL
47 entries of a file. On GNU/Linux the POSIX ACL interface is used via
50 * Editing Changes in Emacs 24.4
52 ** New commands `toggle-frame-maximized' and `cycle-frame-maximized',
53 bound to <f11> and S-<f11>, respectively.
56 * Changes in Specialized Modes and Packages in Emacs 24.4
60 *** Battery information via the BSD `apm' utility is now supported.
64 *** New macro cl-tagbody.
67 *** letf is now just an alias for cl-letf.
71 *** Calc by default now uses the Gregorian calendar for all dates, and
72 uses January 1, 1 AD as its day number 1. Previously Calc used the
73 Julian calendar for dates before September 14, 1752, and it used
74 December 31, 1 BC as its day number 1; the new scheme is more
75 consistent with Calendar's calendrical system and day numbering.
77 *** The new variable `calc-gregorian-switch' lets you configure the
78 date when Calc switches from the Julian to the Gregorian calendar.
79 Nil, the default value, means to always use the Gregorian calendar.
80 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
85 *** New option `erc-accidental-paste-threshold-seconds'.
86 If set to a number, this can be used to avoid accidentally paste large
87 amounts of data into the ERC input.
89 ** Icomplete is a bit more like IDO.
90 *** key bindings to navigate through and select the completions.
91 *** The icomplete-separator is customizable, and its default has changed.
92 *** Removed icomplete-show-key-bindings.
96 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
97 and adds it to the search string.
99 ** MH-E has been updated to MH-E version 8.4.
100 See MH-E-NEWS for details.
103 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
104 Customize `unrmail-mbox-format' to change this.
107 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
108 of how Rmail displays non-MIME messages.
111 ** New function `ses-rename-cell' to give SES cells arbitrary names.
113 ** trace-function was largely rewritten.
114 New features include:
115 - no prompting for the destination buffer, unless a prefix-arg was used.
116 - additionally to prompting for a destination buffer, when a prefix-arg is
117 used, the user can enter a "context", i.e. Lisp expression whose value at the
118 time the function is entered/exited will be printed along with the function
119 name and arguments. Useful to trace the value of (current-buffer) or
120 (point) when the function is invoked.
122 ** New command `delete-duplicate-lines' has two types of operation:
123 when its arg ADJACENT is non-nil (when called interactively with C-u C-u)
124 it works like the utility `uniq'. Otherwise by default it deletes
125 duplicate lines everywhere in the region without regard to adjacency.
129 *** New connection method "adb", which allows to access Android
130 devices by the Android Debug Bridge. The variable `tramp-adb-sdk-dir'
131 must be set to the Android SDK installation directory.
135 *** The commands `woman-default-faces' and `woman-monochrome-faces'
136 are obsolete. Customize the `woman-* faces instead.
138 ** Obsolete packages:
140 *** longlines.el is obsolete; use visual-line-mode instead.
142 *** terminal.el is obsolete; use term.el instead.
145 * New Modes and Packages in Emacs 24.4
146 ** New nadvice.el package offering lighter-weight advice facilities.
148 - add-function/remove-function which can be used to add/remove code on any
149 function-carrying place, such as process-filters or `<foo>-function' hooks.
150 - advice-add/advice-remove to add/remove a piece of advice on a named function,
151 much like `defadvice' does.
153 * Incompatible Lisp Changes in Emacs 24.4
155 ** nil and "unbound" are indistinguishable in symbol-function.
156 `symbol-function' never signals `void-function' any more.
157 `fboundp' returns non-nil if the symbol was `fset' to nil.
159 ** `defadvice' does not honor the `freeze' flag and cannot advise
160 special-forms any more.
162 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
163 VAR was bound to nil which was not tremendously useful and just lead to
164 spurious warnings about an unused var.
166 ** The return value of `backup-buffer' has changed.
167 The second argument is no longer an SELinux context, instead it is an
168 alist of extended attributes as returned by the new function
169 `file-extended-attributes'. The attributes can be applied to another
170 file using `set-file-extended-attributes'.
172 * Lisp changes in Emacs 24.4
174 ** Support for filesystem notifications.
175 Emacs now supports notifications of filesystem changes, such as
176 creation, modification, and deletion of files. This requires the
177 'inotify' API on GNU/Linux systems. On MS-Windows systems, this is
178 supported for Windows XP and newer versions.
182 *** The `face-spec-set' is now analogous to `setq' for face specs.
183 Its third arg now accepts values specifying exactly which face spec to
184 set (defface, custom, or user spec), and it directly sets the relevant
185 property using the supplied face spec.
187 *** Face specs set via Custom themes now replace the `defface' spec
188 rather than inheriting from it (as do face specs set via Customize).
190 ** time-to-seconds is not obsolete any more.
191 ** New function special-form-p.
192 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
193 text-property on the first char.
195 ** The `defalias-fset-function' property lets you catch calls to defalias
196 and redirect them to your own function instead of `fset'.
198 ** The 9th element returned by `file-attributes' is now unspecified.
199 Formerly, it was t if the file's gid would change if file were deleted
200 and recreated. This value has been inaccurate for years on many
201 platforms, and nobody seems to have noticed or cared.
203 ** The function `file-ownership-preserved-p' now has an optional
204 argument GROUP which causes it check for file group too. This can be
205 used in place of the 9th element of `file-attributes'.
207 ** New functions `group-gid' and `group-real-gid'.
209 ** The 6th argument to `copy-file' has been renamed to
210 `preserve-extended-attributes' as it now handles both SELinux context
213 * Changes in Emacs 24.4 on non-free operating systems
216 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
217 The backtrace is written to the 'emacs_backtrace.txt' file in the
218 directory where Emacs was running.
221 * Installation Changes in Emacs 24.3
224 ** The default toolkit has been changed to Gtk+ version 3.
225 If you don't pass --with-x-toolkit to configure or if you pass
226 --with-x-toolkit=gtk or --with-x-toolkit=yes, configure will try to build
227 with Gtk+ version 3, and if that fails, try Gtk+ version 2.
228 You can explicitly require a specific version by passing
229 --with-x-toolkit=gtk2 or --with-x-toolkit=gtk3 to configure.
232 ** New configure option '--without-all' to disable additional features.
233 This disables most of the features that are normally enabled by default.
236 ** New configure option '--enable-link-time-optimization' to utilize
237 an appropriate feature provided by GCC since version 4.5.0.
240 ** New configure option '--enable-gcc-warnings', intended for developers.
241 If building with GCC, this enables compile-time checks that warn about
242 possibly-questionable C code. On a recent GNU system there should be
243 no warnings; on older and on non-GNU systems the generated warnings
247 ** The configure option '--enable-use-lisp-union-type' has been
248 renamed to '--enable-check-lisp-object-type', as the resulting
249 Lisp_Object type no longer uses a union to implement the compile time
250 check that this option enables.
253 ** The configure option '--disable-maintainer-mode' has been removed,
254 as it was confusingly-named and rarely useful.
257 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
258 overwriting "emacs" in the installation bin/ directory with a link
262 ** The configure options `--program-prefix', `--program-suffix', and
263 `--program-transform-name' apply to more than just the installed
264 binaries. Now they also affect the man pages, icons, and the
265 etc/emacs.desktop file; but not the info pages, since this would break
266 links between the various manuals.
269 ** Emacs uses libtinfo in preference to libncurses, if available.
272 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
273 /usr/pkg/lib to the linker search path. You must add them yourself if
277 ** The standalone scripts rcs-checkin and vcdiff have been removed
278 (from the bin and libexec directories, respectively). The former is
279 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
282 * Startup Changes in Emacs 24.3
285 ** Emacs no longer searches for `leim-list.el' files beneath the standard
286 lisp/ directory. There should not be any there anyway. If you have
287 been adding them there, put them somewhere else, eg site-lisp.
290 ** The `--no-site-lisp' command line option now works for Nextstep builds.
293 * Changes in Emacs 24.3
296 ** Most y-or-n prompts now allow you to scroll the selected window.
297 Typing C-v or M-v at a y-or-n prompt scrolls forward or backward
298 respectively, without exiting from the prompt.
302 *** New option `mode-line-default-help-echo' specifies the help text
303 (shown in a tooltip or in the echo area) for any part of the mode line
304 that does not have its own specialized help text.
306 *** You can now click mouse-3 in the coding system indicator to invoke
307 `set-buffer-file-coding-system'.
312 *** `C-h f' (describe-function) can now perform autoloading.
313 When this command is called for an autoloaded function whose docstring
314 contains a key substitution construct, that function's library is
315 automatically loaded, so that the documentation can be shown
316 correctly. To disable this, set `help-enable-auto-load' to nil.
319 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
320 even after their associated libraries have been loaded (and the
321 autoloads have been redefined as functions).
323 ** Minibuffer changes
325 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
326 next and previous path separator, respectively.
328 *** minibuffer-electric-default-mode can rewrite (default ...) to [...].
329 Just set minibuffer-eldef-shorten-default to t before enabling the mode.
332 ** ImageMagick support, if available, is automatically enabled.
333 It is no longer necessary to call `imagemagick-register-types'
334 explicitly to install ImageMagick image types; that function is called
335 automatically at startup, or when customizing an imagemagick- option.
337 *** Setting `imagemagick-types-inhibit' to t now disables the use of
338 ImageMagick to view images. You must call imagemagick-register-types
339 afterwards if you do not use customize to change this.
341 *** The new variable `imagemagick-enabled-types' also affects which
342 ImageMagick types are treated as images. The function
343 `imagemagick-filter-types' returns the list of types that will be
346 *** Images displayed via ImageMagick now support transparency and the
347 :background image spec property.
349 ** Server and client changes
351 *** emacsclient now obeys string values for `initial-buffer-choice',
352 if it is told to open a new frame without specifying any file to visit
353 or expression to evaluate.
355 *** New option `server-auth-key' specifies a shared server key.
358 ** In the Package Menu, newly-available packages are listed as "new",
359 and sorted above the other "available" packages by default.
362 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
363 This minor mode replaces `toggle-read-only', which is now obsolete.
366 ** Emacs now generates backtraces on fatal errors.
367 On encountering a fatal error, Emacs now outputs a textual description
368 of the fatal signal, and a short backtrace on platforms like glibc
369 that support backtraces.
372 ** If your Emacs was built from a bzr checkout, the new variable
373 `emacs-bzr-version' contains information about the bzr revision used.
376 ** New variable `create-lockfiles' specifies usage of lockfiles.
377 It defaults to t. Changing it to nil inhibits the creation of lock
378 files (use this with caution).
381 ** Using "unibyte: t" in Lisp source files is obsolete.
382 Use "coding: raw-text" instead.
385 ** Setting `enable-remote-dir-locals' to non-nil allows directory
386 local variables on remote hosts.
389 ** The entry for PCL-CVS has been removed from the Tools menu.
390 The PCL-CVS commands are still available via the keyboard.
392 ** Internationalization changes
394 *** New language environment: Persian.
396 *** New input method `vietnamese-vni'.
398 ** Nextstep (GNUstep / Mac OS X) port changes
400 *** Fullscreen and frame parameter fullscreen is supported.
402 *** A file dialog is used for open/save operations initiated from the
406 * Editing Changes in Emacs 24.3
408 ** Navigation command changes
410 *** New binding `M-g c' for `goto-char'.
412 *** New binding `M-g TAB' for `move-to-column'.
414 *** `M-g TAB' (`move-to-column') prompts for a column number if called
415 interactively with no prefix arg. Previously, it moved to column 1.
417 ** Search and Replace changes
419 *** Non-regexp Isearch now performs "lax" space matching.
420 Each sequence of spaces in the supplied search string may match any
421 sequence of one or more whitespace characters, as specified by the
422 variable `search-whitespace-regexp'. (This variable is also used by a
423 similar existing feature for regexp Isearch).
425 *** New Isearch command `M-s SPC' toggles lax space matching.
426 This applies to both ordinary and regexp Isearch.
428 *** New option `replace-lax-whitespace'.
429 If non-nil, `query-replace' uses flexible whitespace matching too.
432 *** Global `M-s _' starts a symbol (identifier) incremental search,
433 and `M-s _' in Isearch toggles symbol search mode.
434 `M-s c' in Isearch toggles search case-sensitivity.
437 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
438 `ucs-insert' is now an obsolete alias for `insert-char'.
441 ** The `z' key no longer has a binding in most special modes.
442 It used to be bound to `kill-this-buffer', but `z' is too easy to
446 ** New option `delete-trailing-lines' specifies whether
447 M-x delete-trailing-whitespace should delete trailing lines at the end
448 of the buffer. It defaults to t.
452 *** `C-x r +' is now overloaded to invoke `append-to-register.
454 *** New option `register-separator' specifies the register containing
455 the text to put between collected texts for use with M-x
456 append-to-register and M-x prepend-to-register.
459 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
462 ** New command `C-x r M-w' (copy-rectangle-as-kill).
463 It copies the region-rectangle as the last rectangle kill.
466 ** New option `yank-handled-properties' allows processing of text
467 properties on yanked text, in more ways that are more general than
468 just removing them, as done by `yank-excluded-properties'.
471 * Changes in Specialized Modes and Packages in Emacs 24.3
475 *** The faces used by Apropos are now directly customizable.
476 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
477 see the `apropos' Custom group for details.
479 *** The old options whose values specified faces to use were removed
480 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
483 This package has been rewritten to use Tabulated List mode.
485 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
486 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
491 *** You can customize the header text that appears above each calendar month.
492 See the variable `calendar-month-header'.
495 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
498 *** The calendars produced by cal-html include holidays.
499 Customize `cal-html-holidays' to change this.
504 *** CL's main entry is now (require 'cl-lib).
505 `cl-lib' is like the old `cl' except that it uses the namespace cleanly,
506 i.e. all its definitions have the "cl-" prefix (and internal definitions use
509 If `cl' provided a feature under the name `foo', then `cl-lib' provides it
510 under the name `cl-foo' instead, with the exceptions of the few definitions
511 that had to use `foo*' to avoid conflicts with pre-existing Elisp entities,
512 which have not been renamed to `cl-foo*' but just `cl-foo'.
514 The old `cl' is now deprecated and is mainly just a bunch of aliases that
515 provide the old non-prefixed names. Some exceptions are listed below.
518 *** `cl-flet' is not like `flet' (which is deprecated).
519 Instead it obeys the behavior of Common-Lisp's `flet'.
520 In particular, in cl-flet function definitions are lexically scoped,
521 whereas in flet the scoping is dynamic.
524 *** `cl-labels' is slightly different from `labels'.
525 The difference is that it relies on the `lexical-binding' machinery (as opposed
526 to the `lexical-let' machinery used previously) to capture definitions in
527 closures, so such closures will only work if `lexical-binding' is in use.
530 *** `cl-letf' is not exactly like `letf'.
531 The only difference is in details that relate to some deprecated usage
532 of `symbol-function' in place forms.
535 *** `progv' was rewritten to use the `let' machinery.
536 A side effect is that vars without corresponding value are bound to nil
537 rather than making them unbound.
540 *** The following methods of extending `setf' are obsolete
541 (use features from gv.el instead):
542 `define-modify-macro' (use `gv-letplace')
543 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
544 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
545 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
548 ** New compilation option `compilation-always-kill'.
552 *** `custom-reset-button-menu' now defaults to t.
554 *** Non-option variables are never matched in `customize-apropos' and
555 `customize-apropos-options' (i.e. the prefix argument does nothing for
559 ** `desktop-path' no longer includes the "." directory.
560 Desktop files are now located in ~/.emacs.d by default.
565 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
568 *** The D-Bus object manager interface is implemented.
571 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
572 if their value does not fit into Emacs's integer range.
575 *** The function `dbus-call-method' works non-blocking now, it can be
576 interrupted by C-g. `dbus-call-method-non-blocking' is obsolete.
579 *** Signals can be sent also as unicast message.
582 *** The argument list of `dbus-register-signal' has been extended,
583 according to the new match rule types of D-Bus. See the manual for
587 *** `dbus-init-bus' supports private connections.
590 *** There is a new function `dbus-setenv'.
595 *** Changes are now highlighted using the same color scheme as in
596 modern VCSes. Deletions are displayed in red (new faces
597 `diff-refine-removed' and `smerge-refined-removed', and new definition
598 of `diff-removed'), insertions in green (new faces `diff-refine-added'
599 and `smerge-refined-added', and new definition of `diff-added').
602 *** The variable `diff-use-changed-face' defines whether to use the
603 face `diff-changed', or `diff-removed' and `diff-added' to highlight
604 changes in context diffs.
607 *** The new command `diff-delete-trailing-whitespace' removes trailing
608 whitespace introduced by a diff.
612 *** `dired-do-async-shell-command' executes each file sequentially
613 if the command ends in `;' (when operating on multiple files).
614 Otherwise, it executes the command on each file in parallel.
616 *** Typing M-n in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
617 `dired-do-chown', `dired-do-touch' pulls the file attributes of the
620 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
621 `DEL' (`dired-unmark-backward'), `d' (`dired-flag-file-deletion')
622 mark/unmark/flag all files in the active region.
624 *** The minibuffer default for `=' (`dired-diff) has changed.
625 It is now the backup file for the file at point, if one exists.
626 In Transient Mark mode the default is the file at the active mark.
628 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
629 The global binding for `M-=', `count-words-region' is in effect.
632 ** Ediff now uses the same color scheme as Diff mode.
637 *** New module "notifications", which can send a notification when you
638 receive a private message or your nickname is mentioned.
641 *** ERC will look up server/channel names via auth-source and use any
645 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
646 only applies to messages sent by lurkers.
649 ** Flymake uses fringe bitmaps to indicate errors and warnings.
650 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
651 `flymake-warning-bitmap'.
654 ** Follow mode no longer works by using advice.
655 The option `follow-intercept-processes' has been removed.
658 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
659 specifying URL types that should be converted to remote file names at
660 the FFAP prompt. The default is now '("ftp").
663 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
664 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
667 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
670 ** New option `mouse-avoidance-banish-position' specifies where the
671 `banish' mouse avoidance setting moves the mouse.
674 ** notifications.el supports now version 1.2 of the Notifications API.
675 The function `notifications-get-capabilities' returns the supported
679 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
680 closing brackets to be aligned with the line of the opening bracket.
683 ** In Proced mode, new command `proced-renice' renices marked processes.
688 A new version of python.el, which provides several new features, including:
689 per-buffer shells, better indentation, Python 3 support, and improved
690 shell-interaction compatible with iPython (and virtually any other
693 *** Some user options have been replaced/renamed:
694 Old defcustom: | New defcustom:
695 python-indent | python-indent-offset
696 python-guess-indent | python-indent-guess-indent-offset
697 python-pdbtrack-do-tracking-p | python-pdbtrack-activate
698 python-use-skeletons | python-skeleton-autoinsert
700 *** Some user options have been removed:
702 **** `python-indent-string-contents': Strings are never indented.
704 **** `python-honour-comment-indentation':
705 Comments are never considered as indentation markers themselves.
707 **** `python-continuation-offset': Indentation is automatically
708 calculated in a pep8 compliant way depending on the context.
710 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
711 Have no direct mapping as the shell interaction is completely different.
713 **** `python-python-command', `python-jython-command':
714 Replaced by `python-shell-interpreter'.
716 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
717 `python-pdbtrack-minor-mode-string', `python-source-modes':
720 *** Some commands have been replaced:
721 Old command | New command
722 python-insert-class | python-skeleton-class
723 python-insert-def | python-skeleton-def
724 python-insert-for | python-skeleton-for
725 python-insert-if | python-skeleton-if
726 python-insert-try/except | python-skeleton-try
727 python-insert-try/finally | python-skeleton-try
728 python-insert-while | python-skeleton-while
729 python-find-function | python-nav-jump-to-defun
730 python-next-statement | python-nav-forward-sentence
731 python-previous-statement | python-nav-backward-sentence
732 python-beginning-of-defun-function | python-nav-beginning-of-defun
733 python-end-of-defun-function | python-nav-end-of-defun
734 python-send-buffer | python-shell-send-buffer
735 python-send-defun | python-shell-send-defun
736 python-send-region | python-shell-send-region
737 python-send-region-and-go | Emulate with python-shell-send-region and
738 python-shell-switch-to-shell
739 python-send-string | python-shell-send-string
740 python-switch-to-python | python-shell-switch-to-shell
741 python-describe-symbol | python-eldoc-at-point
744 ** reStructuredText mode
746 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
747 fontification, comment handling, and customization have all been revised
750 *** Support for `imenu' and `which-function-mode'.
752 *** The reStructuredText syntax is more closely covered.
753 Sphinx support has been improved.
755 *** `rst-insert-list' inserts new list or continues existing lists.
757 *** A negative prefix argument always works for `rst-adjust'.
759 *** The window configuration is reset after displaying a TOC.
761 *** The constant `rst-version' describes the rst.el package version.
766 *** Pairing of parens/quotes uses electric-pair-mode instead of skeleton-pair.
768 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
770 *** `sh-use-smie' lets you choose a new indentation and navigation code.
773 ** New option `async-shell-command-buffer' specifies the buffer to use
774 for a new asynchronous `shell-command' when the default output buffer
775 `*Async Shell Command*' is already in use.
778 ** SQL mode has a new option `sql-db2-escape-newlines'.
779 If non-nil, newlines sent to the command interpreter will be escaped
780 by a backslash. The default does not escape the newlines and assumes
781 that the sql statement will be terminated by a semicolon.
783 ** Tabulated List and packages derived from it
785 *** New command `tabulated-list-sort', bound to `S', sorts the column
786 at point, or the Nth column if a numeric prefix argument is given.
790 *** The variables `term-default-fg-color' and `term-default-bg-color' are
791 now deprecated in favor of the customizable face `term'.
793 *** You can customize how to display ANSI terminal colors and styles
794 by customizing the corresponding `term-color-<COLOR>',
795 `term-color-underline' and `term-color-bold' faces.
799 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
800 See the manual for details.
802 *** Remote processes are now supported also on remote Windows host.
806 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
807 Previously, this slot stored semicolon-separated attribute-value pairs
808 appended to some imap URLs, but this is not compatible with RFC 3986.
809 So now the `filename' slot stores the entire path and query components
810 and the `attributes' slot is always nil.
812 *** New function `url-encode-url' for encoding a URI string.
813 The `url-retrieve' function now uses this to encode its URL argument,
814 in case that is not properly encoded.
819 *** The free software compiler GHDL is supported (and now the default).
821 *** Support for the VHDL-AMS packages has been added/updated.
823 *** Updated to the 2002 revision of the VHDL standard.
825 *** Accepts \r and \f as whitespace.
828 ** `which-func-modes' now defaults to t, so Which Function mode, when
829 enabled, applies to all applicable major modes.
832 ** winner-mode-hook now runs when the mode is disabled, as well as when it is
836 ** Hooks renamed to avoid obsolete "-hooks" suffix:
837 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
838 *** semantic-change-hooks -> semantic-change-functions
839 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
840 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
841 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
842 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
843 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
844 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
845 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
846 *** rcirc-activity-hooks -> rcirc-activity-functions
847 *** rcirc-print-hooks -> rcirc-print-functions
848 *** dbus-event-error-hooks -> dbus-event-error-functions
849 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
850 *** checkdoc-style-hooks -> checkdoc-style-functions
851 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
852 *** archive-extract-hooks -> archive-extract-hook
853 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
854 *** hfy-post-html-hooks -> hfy-post-html-hook
855 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
856 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
857 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
858 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
860 ** Obsolete packages:
863 In most cases, assoc+member+push+delq work just as well.
864 And in any case it's just a terrible package: ugly semantics, terrible
865 inefficiency, and not namespace-clean.
880 * Incompatible Lisp Changes in Emacs 24.3
883 ** set-buffer-multibyte now signals an error in narrowed buffers.
886 ** (random) by default now returns a different random sequence in
887 every Emacs run. Use (random S), where S is a string, to set the
888 random seed to a value based on S, in order to get a repeatable
889 sequence in later calls.
892 ** The function `x-select-font' can return a font spec, instead of a
893 font name as a string. Whether it returns a font spec or a font name
894 depends on the graphical library.
897 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
898 that substring is inserted literally even if the LITERAL arg is
899 non-nil, instead of causing an error to be signaled.
902 ** `select-window' now always makes the window's buffer current.
903 It does so even if the window was selected before.
906 ** Docstrings starting with `*' no longer indicate user options.
907 Only variables defined using `defcustom' are considered user options.
908 The function `user-variable-p' is now an obsolete alias for
912 ** The return values of `defalias', `defun' and `defmacro' have changed,
913 and are now undefined. For backwards compatibility, `defun' and
914 `defmacro' currently return the name of the newly defined
915 function/macro, but this should not be relied upon.
918 ** `face-spec-set' no longer sets frame-specific attributes when the
919 third argument is a frame (that usage was obsolete since Emacs 22.2).
922 ** The arguments of `dbus-register-signal' are no longer just strings,
923 but keywords or keyword-string pairs. The old argument list will
924 still be supported for Emacs 24.x.
927 ** The CL package's `get-setf-method' function no longer exists.
928 Generalized variables are now part of core Emacs Lisp, and implemented
929 differently to the way cl.el used to do it. It is not possible to
930 define a compatible replacement for `get-setf-method'. See the file
931 gv.el for internal details of the new implementation.
934 Some Lisp symbols have been renamed to avoid problems with spelling
935 that is incorrect or inconsistent with how Emacs normally spells a word.
938 *** Renamed functions
940 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
941 **** inactivate-input-method -> deactivate-input-method
942 **** quail-inactivate -> quail-deactivate
943 **** robin-inactivate -> robin-deactivate
944 **** viper-inactivate-input-method -> viper-deactivate-input-method
945 **** viper-inactivate-input-method-action ->
946 viper-deactivate-input-method-action
947 **** ucs-input-inactivate -> ucs-input-deactivate
951 The old hooks are still supported for backward compatibility, but they
952 are deprecated and will be removed eventually.
953 **** input-method-inactivate-hook -> input-method-deactivate-hook
954 **** robin-inactivate-hook -> robin-deactivate-hook
955 **** quail-inactivate-hook -> quail-deactivate-hook
958 *** Renamed Lisp variables
959 **** follow-deactive-menu -> follow-inactive-menu
960 **** inactivate-current-input-method-function ->
961 deactivate-current-input-method-function
964 ** Some obsolete functions, variables, and faces have been removed:
965 *** `last-input-char', `last-command-char', `unread-command-char'
966 *** `facemenu-unlisted-faces'
967 *** `rmail-decode-mime-charset'
968 *** `iswitchb-read-buffer'
969 *** `sc-version', `sc-submit-bug-report'
970 *** `set-char-table-default'
971 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
972 *** `compile-internal'
974 *** `mode-line-inverse-video'
975 *** `follow-mode-off-hook'
976 *** `cvs-commit-buffer-require-final-newline'
977 (use `log-edit-require-final-newline' instead)
978 *** `cvs-changelog-full-paragraphs'
979 (use `log-edit-changelog-full-paragraphs' instead)
980 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
981 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
982 *** `vc-master-templates' (use `vc-handled-backends' instead)
983 *** `vc-checkout-carefully'
986 * Lisp changes in Emacs 24.3
988 ** New sampling-based Elisp profiler.
989 Try M-x profiler-start, do some work, and then call M-x profiler-report.
990 When finished, use M-x profiler-stop. The sampling rate can be based on
991 CPU time or memory allocations.
994 ** CL-style generalized variables are now in core Elisp.
995 `setf' is autoloaded; `push' and `pop' accept generalized variables.
996 You can define your own generalized variables using `gv-define-simple-setter',
997 `gv-define-setter', etc.
1000 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1001 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1005 *** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1006 of `read-regexp' accepts a string ending with a colon and space, and its
1007 second argument DEFAULTS can be a list of strings accessible via M-n
1008 in the minibuffer ahead of other hard-coded useful regexp-related values.
1009 More commands use `read-regexp' now to read their regexp arguments.
1013 *** New function `completion-table-with-quoting' to handle completion
1014 in the presence of quoting, such as file completion in shell buffers.
1017 *** New function `completion-table-subvert' to use an existing completion
1018 table, but with a different prefix.
1023 *** New error type and new function `user-error'.
1024 These do not trigger the debugger.
1027 *** New option `debugger-bury-or-kill', saying what to do with the
1028 debugger buffer when exiting debug.
1031 *** Set `debug-on-message' to enter the debugger when a certain
1032 message is displayed in the echo area. This can be useful when trying
1033 to work out which code is doing something.
1035 *** New var `inhibit-debugger', automatically set to prevent accidental
1036 recursive invocations.
1040 *** The functions get-lru-window, get-mru-window and get-largest-window
1041 now accept a third argument to avoid choosing the selected window.
1043 *** Additional values recognized for option `window-combination-limit'.
1046 *** New macro `with-temp-buffer-window', similar to
1047 `with-output-to-temp-buffer'.
1050 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1054 *** New command `fit-frame-to-buffer' adjusts the frame height to
1058 *** The command `fit-window-to-buffer' can adjust the frame height
1059 if the new option `fit-frame-to-buffer' is non-nil.
1062 *** New option switch-to-buffer-preserve-window-point to restore a
1063 window's point when switching buffers.
1065 *** New display action functions `display-buffer-below-selected',
1066 and `display-buffer-in-previous-window'.
1068 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1069 tells display action functions to avoid changing which frame is
1072 *** New display action alist entry `pop-up-frame-parameters', if
1073 non-nil, specifies frame parameters to give any newly-created frame.
1075 *** New display action alist entry `previous-window', if non-nil,
1076 specifies window to reuse in `display-buffer-in-previous-window'.
1078 *** New display action alist entries `window-height' and `window-width'
1079 to specify size of new window created by `display-buffer'.
1081 *** The following variables are obsolete, as they can be replaced by
1082 appropriate entries in the `display-buffer-alist' function introduced
1085 **** `display-buffer-reuse-frames'
1087 **** `special-display-regexps'
1089 **** `special-display-frame-alist'
1091 **** `special-display-buffer-names'
1093 **** `special-display-function'
1095 **** `display-buffer-function'
1097 **** `dired-shrink-to-fit'
1101 *** `current-time-string' no longer requires that its argument's year
1102 must be in the range 1000..9999. It now works with any year supported
1103 by the underlying C implementation.
1105 *** `current-time' now returns extended-format time stamps
1106 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1107 PSEC is typically a multiple of 1000 on current machines. Other
1108 functions that use this format, such as file-attributes and
1109 format-time-string, have been changed accordingly. Old-format time
1110 stamps are still accepted.
1112 *** The format of timers in timer-list and timer-idle-list is now
1113 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1114 The PSECS slot is new, and uses picosecond resolution. It can be
1115 accessed via the new timer--psecs accessor.
1117 *** Last-modified time stamps in undo lists now are of the form
1118 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1121 ** Floating point functions now always return special values like NaN,
1122 instead of signaling errors, if given invalid args, e.g. (log -1.0).
1123 Previously, they returned NaNs on some platforms but signaled errors
1124 on others. The affected functions are acos, asin, tan, exp, expt,
1125 log, log10, sqrt, and mod.
1128 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1129 This can significantly speed up execution of non-byte-compiled code,
1130 but can also bump into previously unnoticed cyclic dependencies.
1131 These are generally harmless: they will simply cause the macro calls
1132 to be left for later expansion (as before), but will result in a
1133 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1134 You may wish to restructure your code so this does not happen.
1136 ** Miscellaneous new functions:
1138 *** `autoloadp' tests if its argument is an autoloaded object.
1140 *** `autoload-do-load' performs the autoloading operation.
1142 *** `buffer-narrowed-p' tests if the buffer is narrowed.
1144 *** `file-name-base' returns a file name sans directory and extension.
1146 *** `function-get' fetches a function property, following aliases.
1148 *** `posnp' tests if an object is a `posn'.
1150 *** `set-temporary-overlay-map' sets up a temporary keymap that
1151 takes precedence over most other maps for a short while (normally one key).
1153 *** `system-users' returns the user names on the system.
1155 *** `system-groups' returns the group names on the system.
1157 *** `tty-top-frame' returns the topmost frame of a text terminal.
1160 ** New macros `setq-local' and `defvar-local'.
1162 ** Changes to special forms and macros
1164 *** `defun' and `defmacro' are now macros rather than special forms
1166 *** `kbd' is now a function rather than a macro.
1169 ** New fringe bitmap `exclamation-mark'.
1172 ** Face underlining can now use a wave.
1174 ** The following functions and variables are obsolete:
1176 *** `automount-dir-prefix' (use `directory-abbrev-alist')
1178 *** `buffer-has-markers-at'
1180 *** `macro-declaration-function' (use `macro-declarations-alist')
1182 *** `window-system-version' (provides no useful information)
1184 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
1186 *** `query-replace-interactive'
1188 *** `font-list-limit' (has had no effect since Emacs < 23)
1191 * Changes in Emacs 24.3 on non-free operating systems
1194 ** Cygwin builds can use the native MS Windows user interface.
1195 Pass --with-w32 to configure. The default remains the X11 interface.
1197 ** Two new functions are available in Cygwin builds:
1198 `cygwin-convert-file-name-from-windows' and
1199 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
1200 code to access the Cygwin file-name mapping machinery to convert
1201 between Cygwin and Windows-native file and directory names.
1203 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
1204 Emacs now supports mouse highlight, help-echo (in the echo area), and
1205 `mouse-autoselect-window'.
1208 ** On MS Windows Vista and later Emacs now supports symbolic links.
1211 ** On MS Windows, you can pass --without-libxml2 to configure.bat to omit
1212 support for libxml2, even if its presence is detected.
1215 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1218 ** On Mac OS X, configure no longer automatically adds the Fink /sw
1219 directories to the search path. You must add them yourself if you want them.
1222 * Changes in Emacs 24.2
1224 ** This is mainly a bug-fix release.
1227 * Installation Changes in Emacs 24.1
1229 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1230 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1231 also depend on Gtk+. You can disable them with --without-rsvg and
1234 ** Emacs can be compiled with GnuTLS support.
1235 This happens by default if a suitably recent version of the library is
1236 found at build time. To prevent this, use the configure option
1237 `--without-gnutls'. See below for GnuTLS features.
1239 ** Emacs can be compiled with SELinux support.
1240 This happens by default if a suitably recent version of the library is
1241 found at build time. To prevent this, use the configure option
1242 `--without-selinux'. See below for SELinux features.
1244 ** Emacs can be compiled with ImageMagick support.
1245 This happens by default if a suitably recent version of the library is
1246 found at build time. To prevent this, use the configure option
1247 `--without-imagemagick'. See below for ImageMagick features.
1248 This feature is not available for the Nextstep or MS ports.
1250 ** Emacs can be compiled with libxml2 support.
1251 This happens by default if a suitably recent version of the library is
1252 found at build time. To prevent this, use the configure option
1253 `--without-xml2'. See below for libxml2 features.
1255 ** By default, the installed Info and man pages are compressed.
1256 You can disable this by configuring --without-compress-info.
1258 ** New configure option --with-wide-int.
1259 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
1260 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1263 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
1264 These provide no new functionality, they just remove the need to edit
1265 lib-src/Makefile by hand in order to use the associated features.
1267 ** New configure option --enable-use-lisp-union-type.
1268 This is only useful for Emacs developers to debug certain types of bugs.
1269 This is not a new feature; only the configure flag is new.
1271 ** The standalone programs digest-doc and sorted-doc are removed.
1272 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1274 ** The standalone program `fakemail' is removed.
1275 If you need it, feedmail.el provides a superset of the functionality.
1278 * Startup Changes in Emacs 24.1
1280 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1281 command line arguments, and the EMACS_UNIBYTE environment variable, no
1282 longer have any effect. (They were declared obsolete in Emacs 23.)
1284 ** New command line option `--no-site-lisp' removes site-lisp directories
1285 from load-path. -Q now implies this. This option does not affect the
1286 EMACSLOADPATH environment variable (and hence has no effect for
1290 * Changes in Emacs 24.1
1294 *** Many packages now use the `completion-at-point' command,
1295 rather than implementing separate completion commands.
1297 *** `completion-at-point' now handles tags and semantic completion.
1299 *** Completion in a non-minibuffer now tries to detect the end of completion
1300 and pops down the *Completions* buffer accordingly.
1302 *** New option `completion-cycle-threshold' allows completion cycling.
1304 *** New option `completion-category-overrides' for overriding the
1305 default completion style in certain circumstances.
1307 *** New completion style `substring'.
1309 *** Completion of buffer names uses `substring' completion by default.
1311 *** The option `widget-complete-field' has been removed.
1315 *** The first time you try sending mail, Emacs asks for a mail method.
1316 This is implemented by a new default for `send-mail-function', which
1317 is `sendmail-query-once'. This offers to use the smtpmail package, or
1318 to use the old defaults relying on external mail facilities
1319 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
1320 `mailclient-send-it' on Windows).
1322 *** Typing C-c m in the buffer made by M-x report-emacs-bug transfers
1323 the report to your desktop's preferred mail client, if there is one.
1324 This uses either the "xdg-email" utility, or Mac OS's "open" command.
1326 *** See Changes in Specialized Modes and Packages for SMTPmail changes
1327 and Mail mode changes
1329 ** Emacs server and client changes
1331 *** New option `server-port' specifies the port for TCP Emacs servers.
1333 *** New emacsclient argument -q/--quiet suppresses some status messages.
1335 *** New emacsclient argument --frame-parameters specifies the frame
1336 parameters of any newly-created graphical frame.
1338 *** If emacsclient shuts down due to Emacs signaling an error,
1339 its exit status is 1.
1341 *** New emacsclient argument --parent-id ID.
1342 This opens a client frame in parent X window ID, via XEmbed, similar
1343 to the --parent-id argument to Emacs.
1345 ** Internationalization changes
1347 *** Emacs now supports display and editing of bidirectional text.
1348 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1349 displayed in the correct visual order as expected by users of those
1350 scripts. The display reordering is a "full bidirectionality" class
1351 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1352 with no RTL text should look exactly the same as before.
1354 **** New buffer-local variable `bidi-display-reordering'.
1355 To disable display reordering in a buffer, change this to nil.
1357 **** New buffer-local variable `bidi-paragraph-direction'.
1358 If nil (the default), Emacs determines the base direction of each
1359 paragraph from its text, as specified by the UBA. Setting the value
1360 to `right-to-left' or `left-to-right' forces a base direction on each
1363 Paragraphs with right-to-left base direction are displayed starting at
1364 the right window edge.
1366 *** Enhanced support for characters with no glyphs in available fonts,
1367 or, on text terminals, characters that cannot be encoded by the
1368 terminal coding system. The new option `glyphless-char-display-control'
1369 specifies how to display them: as a hexadecimal code in a box, a thin
1370 1-pixel space, an empty box, etc.
1372 *** New input methods for Farsi and Bulgarian
1373 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
1375 *** `nobreak-char-display' now also highlights Unicode hyphen chars
1376 (U+2010 and U+2011).
1378 *** New Hebrew translation of the Emacs Tutorial.
1379 Type `C-u C-h t' to choose it in case your language setup doesn't
1380 automatically select it.
1382 ** An Emacs Lisp package manager is now included.
1383 This is a convenient way to download and install additional packages,
1384 from a package repository at http://elpa.gnu.org.
1386 *** M-x list-packages shows a list of packages, which can be
1387 selected for installation.
1389 *** New command `describe-package', bound to `C-h P'.
1391 *** By default, all installed packages are loaded automatically when
1392 Emacs starts up. To disable this, set `package-enable-at-startup' to
1393 nil. To specify the packages to load, customize `package-load-list'.
1395 ** Custom theme changes
1397 *** New command `M-x customize-themes', which provides a convenient
1398 interface for enabling and disabling Custom themes.
1400 *** New option `custom-theme-load-path' is the load path for themes.
1401 Emacs no longer looks for Custom themes in `load-path'. The default
1402 value of `custom-theme-load-path' says to look for themes in
1403 `custom-theme-directory', followed by a subdirectory of
1404 `data-directory' named "themes/", which contains a small selection of
1405 built-in Custom themes.
1407 *** New option `custom-safe-themes' records known-safe theme files.
1408 If a theme is not in this list, Emacs queries before loading it, and
1409 offers to save the theme to `custom-safe-themes' automatically. By
1410 default, all themes included in Emacs are treated as safe.
1412 ** Improved GTK integration
1414 *** GTK scroll-bars are now placed on the right by default.
1415 The function `set-scroll-bar-mode' can change this.
1417 *** GTK tool bars can have just text, just images or images and text.
1418 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
1419 the default is taken from desktop settings.
1421 *** GTK tool bars can be placed on any edge of the frame.
1422 The frame-parameter tool-bar-position controls this. It takes the
1423 values top, left, right or bottom. The Options => Show/Hide menu has
1426 *** The default colors for selected text (the `region' face) are taken
1427 from the GTK theme when Emacs is built with GTK.
1429 *** Emacs uses GTK tooltips by default if built with GTK.
1430 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
1432 ** Graphical interface changes
1434 *** On graphical displays, the mode-line no longer ends in dashes.
1435 Also, the first dash (which does not indicate anything) is just
1436 displayed as a space.
1438 *** `menu-bar-select-buffer-function' lets you choose another operation
1439 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
1441 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
1442 built with Xft. These fonts can be set via X resources, for example:
1443 Emacs.pane.menubar.font: Courier-12
1447 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
1448 or if it receives a SIGINT signal in batch mode.
1450 *** `kill-emacs-hook' is now also run in batch mode.
1451 Third-party code which adds to `kill-emacs-hook' should check if they
1452 do the right thing in batch mode.
1454 ** Scrolling changes
1456 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
1457 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
1458 of buffer at first key-press (instead they move to top/bottom of buffer)
1459 when `scroll-error-top-bottom' is non-nil.
1461 *** New option `scroll-error-top-bottom' (see above).
1463 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
1464 scroll a line instead of full screen.
1466 *** New property `scroll-command' should be set on a command's symbol to
1467 define it as a scroll command affected by `scroll-preserve-screen-position'.
1469 *** If you customize `scroll-conservatively' to a value greater than 100,
1470 Emacs will never recenter point in the window when it scrolls due to
1471 cursor motion commands or commands that move point (e.f., `M-g M-g').
1472 Previously, you needed to use `most-positive-fixnum' as the value of
1473 `scroll-conservatively' to achieve the same effect.
1475 *** "Aggressive" scrolling now honors the scroll margins.
1476 If you customize `scroll-up-aggressively' or
1477 `scroll-down-aggressively' and move point off the window, Emacs now
1478 scrolls the window so as to avoid positioning point inside the scroll
1481 ** Basic SELinux support has been added.
1482 This requires Emacs to be linked with libselinux at build time.
1484 *** Emacs preserves the SELinux file context when backing up.
1485 Also, the function `copy-file' has an extra optional argument for
1486 preserving SELinux context, and the return value of `backup-buffer'
1487 now includes the SELinux context.
1489 *** New functions `file-selinux-context' and `set-file-selinux-context'
1490 get and set the SELinux context of a file.
1494 *** `delete-by-moving-to-trash' now only affects commands that specify
1495 trashing. This avoids inadvertently trashing temporary files.
1497 *** Calling `delete-file' or `delete-directory' with a prefix argument
1498 now forces true deletion, regardless of `delete-by-moving-to-trash'.
1500 ** File- and directory-local variable changes
1502 *** You can stop directory local vars from applying to subdirectories.
1503 Add an element (subdirs . nil) to the alist portion of any variables
1504 settings to indicate that the section should not apply to
1507 *** Directory local variables can apply to some file-less buffers.
1508 Affected modes include dired, vc-dir, and log-edit. For example,
1509 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
1510 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
1511 `hack-dir-local-variables-non-file-buffer' to support this.
1513 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
1514 Instead, use "eval: (minor-mode 1)".
1516 *** The variable `inhibit-first-line-modes-regexps' has been renamed
1517 to `inhibit-local-variables-regexps'. As the name suggests, it now
1518 applies to ALL file local variables, not just -*- lines. The
1519 associated `inhibit-first-line-modes-suffixes' has been renamed in the
1524 *** The `quit-window' command now restores the last buffer displayed
1525 in the quitted window.
1527 *** Resizing an Emacs frame now preserves proportional window sizes,
1528 modulo restrictions like window minimum sizes and fixed-size windows.
1530 *** The behavior of `display-buffer' is now customizable in detail.
1532 **** New option `display-buffer-base-action' specifies a list of
1533 user-determined display "actions" (functions and optional arguments
1534 for choosing the displaying window).
1536 This takes precedence over the default display action, which is
1537 specified by `display-buffer-fallback-action'.
1539 **** New option `display-buffer-alist' maps buffer name regexps to
1540 display actions, taking precedence over `display-buffer-base-action'.
1542 *** New option `window-combination-limit'.
1543 The new option `window-combination-limit' allows to return the space
1544 obtained for resizing or creating a window more reliably to the window
1545 from which such space was obtained.
1547 *** New option `window-combination-resize'.
1548 The new option `window-combination-resize' allows to split a window that
1549 otherwise cannot be split because it's too small by stealing space from
1550 other windows in the same combination. Subsequent resizing or deletion
1551 of the window will resize all windows in the same combination as well.
1553 *** New option `frame-auto-hide-function' lets you choose between
1554 iconifying or deleting a frame when burying a buffer in a dedicated
1555 frame, or quitting a window showing a buffer in a frame of its own.
1557 *** New commands `maximize-window' and `minimize-window'.
1558 These maximize and minimize the size of a window within its frame.
1560 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
1561 These functions allow to navigate through the live buffers that have
1562 been shown in a specific window.
1564 ** Minibuffer changes
1566 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
1567 This is handy for minibuffer-only frames, and is also used for the feature
1568 where mouse-1 pops up *Messages*"', which can now easily be changed.
1570 *** Minibuffers set `truncate-lines' to nil.
1571 If you want to change the value to something else, you could use
1572 for example `minibuffer-setup-hook'.
1574 ** `auto-mode-case-fold' is now enabled by default.
1576 ** `backup-by-copying-when-mismatch' now defaults to t.
1578 ** New basic faces `error', `warning', `success'.
1579 These are used to highlight text indicating failure, caution or
1580 successful operation.
1582 ** New option `list-colors-sort' defines the color sort order
1583 for `list-colors-display'.
1585 ** The variable `focus-follows-mouse' now always defaults to nil.
1588 * Editing Changes in Emacs 24.1
1592 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
1593 `isearch-yank-line'.
1595 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
1596 `isearch-yank-kill'.
1598 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
1600 ** New commands `count-words-region' and `count-words'.
1602 *** M-= is bound to `count-words-region', not `count-lines-region'.
1603 The `count-words-region' command, when called interactively, reports
1604 the number of lines, words, and characters in the region. It is a
1605 superset of the old `count-lines-region', which is now an obsolete
1608 ** The command `just-one-space' (M-SPC), if given a negative argument,
1609 also deletes newlines around point.
1613 *** New option `delete-active-region'.
1614 If non-nil, [delete] and DEL delete the region if it is active and no
1615 prefix argument is given. If set to `kill', those commands kill
1618 *** New command `delete-forward-char', bound to [delete].
1619 This is meant for interactive use, and obeys `delete-active-region'.
1620 The command `delete-char' does not obey `delete-active-region'.
1622 *** `delete-backward-char' is now a Lisp function.
1623 Apart from obeying `delete-active-region', its behavior is unchanged.
1624 However, the byte compiler now warns if it is called from Lisp; Lisp
1625 callers should use delete-char with a negative argument instead.
1627 *** The option `mouse-region-delete-keys' has been deleted.
1629 ** Selection changes.
1631 The default handling of clipboard and primary selections has been
1632 changed to conform with modern X applications. In short, most
1633 commands for killing and yanking text now use the clipboard, while
1634 mouse commands use the primary selection.
1636 In the following, we provide a list of these changes, followed by a
1637 list of steps to get the old behavior back if you prefer that.
1639 *** `select-active-regions' now defaults to t.
1640 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
1641 the kill ring. The selected text is put in the primary selection, if
1642 the system possesses a separate primary selection facility (e.g. X).
1644 **** `select-active-regions' also accepts a new value, `only'.
1645 This means to only set the primary selection for temporarily active
1646 regions (usually made by mouse-dragging or shift-selection);
1647 "ordinary" active regions, such as those made with C-SPC followed by
1648 point motion, do not alter the primary selection.
1650 **** `mouse-drag-copy-region' now defaults to nil.
1652 *** mouse-2 is now bound to `mouse-yank-primary'.
1653 This pastes from the primary selection, ignoring the kill-ring.
1654 Previously, mouse-2 was bound to `mouse-yank-at-click'.
1656 *** `x-select-enable-clipboard' now defaults to t on all platforms.
1658 *** `x-select-enable-primary' now defaults to nil.
1659 Thus, commands that kill text or copy it to the kill-ring (such as
1660 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
1662 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
1663 exactly equivalent to M-w, C-w, and C-y respectively.
1665 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
1666 non-nil by default, as Windows does not support the primary selection
1667 between applications.
1669 *** To return to the previous behavior, do the following:
1671 **** Change `select-active-regions' to nil.
1672 **** Change `mouse-drag-copy-region' to t.
1673 **** Change `x-select-enable-primary' to t (on X only).
1674 **** Change `x-select-enable-clipboard' to nil.
1675 **** Bind `mouse-yank-at-click' to mouse-2.
1677 *** Support for X cut buffers has been removed.
1679 *** X clipboard managers are now supported.
1680 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
1682 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
1683 in the current rectangle. With a prefix argument, this prompts for a
1684 number to count from and for a format string.
1686 ** `redisplay-dont-pause' now defaults to t.
1687 This makes Emacs feel more responsive to editing commands that arrive
1688 at high rate, e.g. if you lean on some key, because stopping redisplay
1689 in the middle (when this variable is nil) forces more expensive
1690 updates later on, and Emacs appears to be unable to keep up.
1692 ** The behavior of <TAB> for active regions in Text mode has changed.
1693 In Text and related modes, typing <TAB> (`indent-for-tab-command')
1694 when the region is active causes Emacs to indent all the lines in the
1695 region, aligning them with the line previous to the first line in the
1696 region (or with the left margin if there is no previous line).
1698 ** When `occur' is called with a prefix argument, matching strings are
1699 collected into the `*Occur*' buffer without line numbers. If there
1700 are parenthesized subexpressions in the specified regexp, `occur'
1701 reads replacement text that may contain \\& and \\N whose convention
1702 follows `replace-match'.
1705 * Changes in Specialized Modes and Packages in Emacs 24.1
1707 ** Archive Mode has basic support for browsing and updating 7z archives.
1711 *** BibTeX mode now supports biblatex.
1712 Use the variable `bibtex-dialect' to select different BibTeX dialects.
1713 `bibtex-entry-field-alist' is now an obsolete alias for
1714 `bibtex-BibTeX-entry-alist'.
1716 *** New command `bibtex-search-entries', bound to C-c C-a.
1718 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
1720 *** New variable `bibtex-search-entry-globally'.
1724 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
1726 *** The default browser used by the package is now the "xdg-open" program,
1727 on platforms that support it. This calls your desktop's preferred browser.
1729 ** Calendar, Diary, and Appt
1731 *** Diary entries can contain non-printing "comments".
1732 See the variable `diary-comment-start'.
1734 *** Appointments can specify their individual warning times.
1735 See the variable `appt-warning-time-regexp'.
1737 *** The function specified by `appt-disp-window-function' may be passed
1738 lists of arguments if multiple appointments are due at similar times.
1739 If you are using a custom function for this, you should update it.
1741 *** New function `diary-hebrew-birthday'.
1743 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
1744 may no longer be nil, but must all be strings.
1746 *** The obsolete (since Emacs 22.1) method of enabling the appt
1747 package by adding `appt-make-list' to `diary-hook' has been removed.
1748 Use `appt-activate' instead.
1750 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
1751 appt-issue-message (use the function appt-activate)
1752 appt-visible/appt-msg-window (use the variable appt-display-format)
1754 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
1755 view-diary-entries, list-diary-entries, show-all-diary-entries
1759 *** New feature to "guess" the style in an existing buffer.
1760 The main entry point is M-x c-guess.
1762 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
1764 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
1765 Thus C-M-a will, by default, go to the beginning of the immediate function,
1768 *** "Macros with semicolons" can be registered for correct indentation.
1769 Where such a macro ends a line (no semicolon) the next statement is no longer
1770 parsed as a statement continuation.
1772 ** Comint and modes derived from it use the standard completion code.
1776 *** Compilation mode can be used without Font Lock mode.
1777 `compilation-parse-errors-function' is now obsolete.
1779 *** New variable `compilation-filter-start', which is bound while
1780 `compilation-filter-hook' runs. It records the start position of the
1781 text inserted by `compilation-filter'.
1783 *** `compilation-error-screen-columns' and `compilation-first-column'
1784 are obeyed in the editing buffer. So programming language modes can
1785 set them, whereas previously only the value in the *Compilation*
1790 *** Customize buffers now contain a search field.
1791 The search is performed using `customize-apropos'.
1792 To turn off the search field, set `custom-search-field' to nil.
1794 *** Options in customize group buffers start out hidden if not customized.
1795 Use the arrow to the left of the option name to toggle visibility.
1797 *** custom-buffer-sort-alphabetically now defaults to t.
1799 *** The color widget now has a "Choose" button, which allows you to
1800 choose a color via `list-colors-display'.
1804 *** It is now possible to access buses other than the default system
1807 *** The `dbus-register-method' and `dbus-register-property' functions
1808 optionally do not register names.
1810 *** The new function `dbus-register-service' registers a known service
1811 name on a D-Bus without also registering a property or a method.
1815 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
1816 if called with a prefix argument, read a file name from the minibuffer
1817 instead of using the current buffer.
1819 *** The "dired local variables" feature of Dired-x is obsolete.
1820 The standard directory local variables feature replaces it.
1824 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
1825 controlling attempts to autojoin a channel.
1827 *** New variable `erc-coding-system-precedence': If we use `undecided'
1828 as the server coding system, this variable will then be consulted.
1829 The default is to decode strings that can be decoded as utf-8 as
1830 utf-8, and do the normal `undecided' decoding for the rest.
1834 *** The default value of `eshell-directory-name' has changed
1835 to be an "eshell" directory in `user-emacs-directory'.
1836 The old "~/.eshell/" directory is still used if it exists, though.
1840 *** The M-x gdb command now uses the GDB Machine Interface protocol.
1841 It now supports multithread non-stop debugging and simultaneous
1842 debugging of several threads.
1846 *** RET (`image-toggle-animation') toggles animation, if applicable.
1847 Animation plays once, unless the option `image-animate-loop' is non-nil.
1851 *** New command M-x info-display-manual displays a named Info manual.
1852 If that manual is already visited in some Info buffer, it displays
1853 that buffer. (This is handy if you have many manuals in many *info*
1854 buffers, and don't remember the name of the buffer visiting the manual
1855 you want to consult.) Otherwise, it loads and displays the manual.
1857 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
1858 This is for compatibility with the stand-alone Info reader program,
1859 and also because `Info-edit' is a rarely used command that is disabled
1862 ** Mail mode changes (not Message mode)
1864 *** New command M-x mail-add-attachment for adding MIME attachments
1866 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
1867 (Its name is misleading, since it has nothing to do with MIME
1868 attachments.) The old name is now an obsolete alias to the new name.
1870 ** MH-E has been updated to MH-E version 8.3.1.
1871 See MH-E-NEWS for details.
1873 ** Modula-2 mode provides auto-indentation.
1875 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
1877 ** nXML mode no longer binds C-RET to `nxml-complete'.
1878 Completion is now performed via `completion-at-point', bound to C-M-i
1879 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
1880 default), this performs tag completion.
1882 ** Org mode has been updated to version 7.8.09.
1883 See ORG-NEWS for details.
1885 ** Prolog mode has been completely revamped, with lots of additional
1886 functionality such as more intelligent indentation, electricity,
1887 support for more variants, including Mercury, and a lot more.
1891 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
1892 in the Rmail incoming message.
1894 *** The variable `rmail-message-filter' no longer has any effect.
1895 This change was made in Emacs 23.1 but was not advertised at the time.
1896 Try using `rmail-show-message-hook' instead.
1900 *** M-x shell prompts for the shell path name if the default directory
1901 is a remote file name and neither the environment variable $ESHELL nor
1902 the variable `explicit-shell-file-name' is set.
1904 *** TAB is now bound to the standard `completion-at-point' command,
1905 which now implements the pcomplete rules for shell command completion.
1909 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
1910 if the mail server supports them. This uses either built-in GnuTLS
1911 support, or the starttls.el library. Customize `smtpmail-stream-type'
1914 *** The variable `smtpmail-auth-credentials' has been removed.
1915 By default, the information is now stored in the file ~/.authinfo.
1916 This was the default value of smtpmail-auth-credentials. If you had
1917 customized smtpmail-auth-credentials to a list of user names and
1918 passwords, those settings are not used. During your first connection
1919 to the smtp server, Emacs will prompt for the user name and password,
1920 and offer to save them to ~/.authinfo. Or you can manually copy the
1921 credentials to ~/.authinfo. For example, if you had
1923 (setq smtpmail-auth-credentials
1924 '(("mail.example.org" 25 "jim" "s!cret")))
1926 then the equivalent line in ~/.authinfo would be
1928 machine mail.example.org port 25 login jim password s!cret
1930 See the auth-source manual for more information, e.g. on encrypting
1931 the credentials file.
1933 *** The variable `smtpmail-starttls-credentials' has been removed.
1934 If you had that set, you need to put
1936 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
1938 in your ~/.authinfo file instead.
1940 *** SMTPmail defaults to using the address in the From: header as the
1941 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
1942 to the address you wish to use instead.
1946 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
1947 and `sql-oracle-scan-on'.
1949 *** New options controlling prompting for login parameters.
1950 Each supported product has a custom variable `sql-*-login-params',
1951 which is a list of the parameters to be prompted for before a
1952 connection is established.
1954 *** The command `sql-product-interactive' now takes a prefix argument,
1955 which causes it to prompt for an SQL product.
1957 *** Product-specific SQL interactive commands now take prefix arguments.
1958 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
1959 given a prefix argument, prompt for a name for the SQL interactive
1960 buffer. This reduces the need for calling `sql-rename-buffer'.
1962 *** SQL interactive modes suppress command continuation prompts, and
1963 replace tabs with spaces. The first change impacts multiple line SQL
1964 statements entered with C-j between each line, statements yanked into
1965 the buffer and statements sent with `sql-send-*' functions. The
1966 second prevents the MySQL and Postgres interpreters from listing
1967 object name completions when sent text via `sql-send-*' functions.
1969 *** New command `sql-connect' starts a predefined SQLi session,
1970 using the login parameters from `sql-connection-alist'.
1972 *** New "Save Connection" menu item in SQLi buffers.
1973 This gathers the login params specified for the SQLi session, if it
1974 was not started by a connection, and saves them as a new connection.
1976 *** New commands for listing database objects and details:
1977 sql-list-all and sql-list-table.
1979 *** An API for manipulating SQL product definitions has been added.
1983 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
1987 *** New inline access method "ksu" (kerberized su).
1989 *** The following access methods are discontinued: "ssh1_old",
1990 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
1992 *** The user option `remote-file-name-inhibit-cache' controls whether
1993 remote file attributes are cached for better performance.
1995 *** The option `ange-ftp-binary-file-name-regexp' has changed its
1996 default value to "".
1998 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
1999 for remote machines which support SELinux.
2001 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2002 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2003 the degree of parallelism.
2005 ** VC and related modes
2007 *** Support for pulling on distributed version control systems.
2008 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2009 supported (currently with Bzr, Git, and Mercurial), to update the
2010 current branch and working tree. A prefix argument means to prompt
2011 the user for specifics, e.g. a pull location.
2013 *** `vc-update' is now an alias for `vc-pull'.
2015 *** Support for merging on distributed version control systems.
2016 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2017 is supported (currently with Bzr, Git, and Mercurial), to merge
2018 changes from another branch into the current one. It prompts for
2019 specifics, e.g. a merge source.
2021 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2022 shows a diff while querying the user. It defaults to t.
2024 *** Log entries in some Log View buffers can be toggled to display a
2025 longer description by typing RET (log-view-toggle-entry-display).
2026 This is currently supported for Bzr, Git, and Mercurial (to support
2027 another backend, define a `log-view-expanded-log-entry-function').
2028 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2029 use this to display the full log entry for the revision at point.
2031 *** New command `vc-ediff' allows visual comparison of two revisions
2032 of a file similar to `vc-diff', but using ediff backend.
2034 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2035 this was not advertised at the time.
2037 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2038 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2039 this was not advertised at the time.
2045 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2047 *** partial-completion-mode (complete.el) is obsolete.
2048 You can get a comparable behavior with:
2049 (setq completion-styles '(partial-completion initials))
2050 (setq completion-pcm-complete-word-inserts-delimiters t)
2052 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2054 *** pgg is obsolete (use EasyPG instead).
2056 *** sregex.el is obsolete, since rx.el is a strict superset.
2058 *** s-region.el and pc-select.el are obsolete.
2059 They are superseded by shift-select-mode, enabled by default since 23.1.
2061 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2065 *** The Landmark game is now invoked with `landmark', not `lm'.
2066 Its functions and variables have been similarly renamed.
2068 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2069 (This interfered with cua-mode.)
2071 *** f90.el has some support for Fortran 2008 syntax.
2073 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2075 *** New command `nato-region' converts text to NATO phonetic alphabet.
2078 * New Modes and Packages in Emacs 24.1
2080 ** Occur Edit mode applies edits made in *Occur* buffers to the
2081 original buffers. It is bound to "e" in Occur mode.
2083 ** New global minor mode electric-pair-mode.
2084 When enabled, typing an open parenthesis automatically inserts the
2085 matching closing one.
2087 ** New global minor mode electric-indent-mode.
2088 When enabled, typing certain characters triggers reindentation.
2089 Major modes wishing to use this can set electric-indent-chars or
2090 electric-indent-functions.
2092 ** New global minor mode electric-layout-mode.
2093 When enabled, typing certain characters automatically inserts newlines.
2094 Major modes wishing to use this can set electric-layout-rules.
2096 ** tabulated-list.el provides a generic major mode for tabulated data,
2097 from which other modes can be derived.
2099 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2101 ** secrets.el is an implementation of the Secret Service API, an
2102 interface to password managers like GNOME Keyring or KDE Wallet. The
2103 Secret Service API requires D-Bus for communication. The command
2104 `secrets-show-secrets' offers a buffer with a visualization of the
2107 ** notifications.el provides an implementation of the Desktop
2108 Notifications API. It requires D-Bus for communication.
2110 ** soap-client.el supports access to SOAP web services from Emacs.
2111 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2113 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
2115 ** New emacs-lock.el package.
2116 The previous version has been moved to obsolete/old-emacs-lock.el.
2117 Now, there is a proper minor mode `emacs-lock-mode'. Protection
2118 against exiting Emacs and killing the buffer can be set separately.
2119 The mechanism for automatically turning off protection for buffers
2120 with dead inferior processes has been generalized.
2123 * Incompatible Lisp Changes in Emacs 24.1
2125 ** Passing a nil argument to a minor mode function call now ENABLES
2126 the minor mode unconditionally. This is so that you can write e.g.
2128 (add-hook 'text-mode-hook 'foo-mode)
2130 to enable foo-mode in Text mode buffers, removing the need for
2131 `turn-on-foo-mode' style functions. This affects all mode commands
2132 defined by `define-minor-mode'. If called interactively, the mode
2133 command still toggles the minor mode.
2135 ** The return value of `backup-buffer' has changed.
2136 It is now a list of three elements, where the second element is a list
2137 describing the original file's SELinux context. If Emacs or the
2138 system lacks SELinux support, the context list is (nil nil nil nil).
2139 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
2141 ** `char-direction-table' and the `char-direction' function were deleted.
2142 They were buggy and inferior to the new support of bidirectional
2143 editing introduced in Emacs 24. If you need the bidirectional
2144 properties of a character, use `get-char-code-property' with the last
2145 argument `bidi-class'.
2147 ** `copy-directory' now copies the source directory as a subdirectory
2148 of the target directory, if the latter is an existing directory. The
2149 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2150 the contents directly into a pre-existing target directory.
2152 ** For mouse click input events in the text area, the Y pixel
2153 coordinate in the POSITION list now counts from the top of the text
2154 area, excluding any header line. Previously, it counted from the top
2157 ** Support for "old-style" backquotes, obsolete for 10+ years, has
2158 been further reduced. Now a backquote not followed by a space is
2159 always treated as a "new-style" backquote. Please remove all
2160 "old-style" backquotes from your code. If your code uses backquotes
2161 as documented in the Elisp manual, and compiles without warning, then
2162 you have nothing to do in this regard. Code not following the
2163 appropriate conventions may fail to compile.
2165 The most common cause of trouble seems to be an old-style backquote
2166 followed by a newline. Another cause of trouble is vector notation
2167 for key sequence notation: instead of [(control ,)] and [(control ')],
2168 you should write [(control ?,)] and [(control ?')], which will work in
2171 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2172 was not advertised at the time. The function `custom-initialize-delay'
2173 replaced all known uses.
2175 ** `view-buffer' now treats special mode-class in the same way that
2176 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2177 major mode is special).
2179 ** Menu and tool bar changes
2181 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
2182 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2183 With these alist entries omitted, `make-frame' checks the value of the
2184 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2185 a menu-bar or tool-bar, respectively. If the alist entries are added,
2186 they override the value of `menu-bar-mode'/`tool-bar-mode'.
2188 *** The menu bar bindings's caches are not used any more.
2189 Use (where-is-internal <def> nil t) instead.
2191 ** Regions created by mouse dragging are now normal active regions,
2192 similar to those created by shift-selection (see Selection changes
2193 above). In previous Emacs versions, these regions were delineated by
2194 `mouse-drag-overlay'; that variable has been removed.
2196 ** The fourth argument of `filter-buffer-substring' has been removed.
2197 If you want to remove text properties from the final result, simply
2198 pass the result through substring-no-properties.
2200 ** cl.el no longer provides `cl-19'.
2202 ** The following obsolete functions and aliases have been removed
2203 (the appropriate new function is given in parentheses; "not needed"
2204 means you can just remove all calls to the function in question):
2206 *** `comint-kill-output' (`comint-delete-output')
2207 *** `decompose-composite-char' (`char-to-string')
2208 *** `outline-visible' (`outline-invisible-p')
2209 *** `internal-find-face' (`facep')
2210 *** `internal-get-face' (`facep and check-face')
2211 *** `frame-update-faces' (not needed)
2212 *** `frame-update-face-colors' (`frame-set-background-mode')
2213 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2214 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2215 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2216 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2217 *** `x-make-font-unbold' (`make-face-unbold')
2218 *** `x-make-font-unitalic' (`make-face-unitalic')
2219 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2220 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2221 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2222 *** `char-bytes' (== 1)
2223 *** `isearch-return-char' (`isearch-printing-char')
2224 *** `make-local-hook' (not needed)
2225 *** `set-screen-height' (`set-frame-height')
2226 *** `set-screen-width' (`set-frame-width')
2228 ** The following obsolete variables and varaliases have been removed
2229 (the appropriate new variable is given in parentheses):
2231 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2232 *** `vc-header-alist' (`vc-BACKEND-header')
2233 *** `directory-sep-char' (== ?/)
2234 *** `font-lock-defaults-alist' (`font-lock-defaults')
2235 *** `e' (`float-e').
2237 ** The following obsolete files were removed:
2238 sc.el, x-menu.el, rnews.el, rnewspost.el
2240 ** The format of the finder-inf.el file has changed, since the Finder
2241 mechanism is now based on the package system. The variable
2242 `finder-package-info' is replaced by `package--builtins' and
2243 `finder-keywords-hash'.
2245 ** When generating autoloads, `update-directory-autoloads' no longer
2246 assumes every inspected file is in your `load-path'. It instead
2247 generates relative names according to the current `load-path'.
2250 * Lisp changes in Emacs 24.1
2252 ** Code can now use lexical scoping by default instead of dynamic scoping.
2253 The `lexical-binding' variable enables lexical scoping for local
2254 variables. It is typically set via a file-local variable in the first
2255 line of the file, in which case it applies to all the code in that
2258 *** `eval' takes a new optional argument `lexical' to choose the new lexical
2259 binding instead of the old dynamic binding mode.
2261 *** Lexically scoped interpreted functions are represented with a new form
2262 of function value which looks like (closure ENV ARGS &rest BODY).
2264 *** New macro `letrec' to define recursive local functions.
2266 *** `defvar' and `defconst' now mark the variable as special (dynamic).
2267 So do `defcustom' and other forms that call `defvar' as a subroutine.
2269 *** New function `special-variable-p' to check whether a variable is
2270 declared as dynamically bound.
2272 *** The form ((lambda ...) ...) is deprecated.
2274 ** An Emacs Lisp testing tool is now included.
2275 Emacs Lisp developers can use this tool to write automated tests for
2276 their code. See the ERT info manual for details.
2278 ** Changes for bidirectional display and editing
2280 *** New function `current-bidi-paragraph-direction'.
2281 This returns the base direction of the paragraph at point.
2283 *** New function `bidi-string-mark-left-to-right'.
2284 Given a string containing characters from right-to-left scripts, this
2285 function returns another string which can be safely inserted into a
2286 buffer, such that any following text will be always displayed to the
2287 right of that string. (This works by appending an invisible Unicode
2288 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
2290 This is useful when the buffer has overall left-to-right paragraph
2291 direction and you need to insert a string whose contents are not known
2292 in advance, without disrupting the layout of the line.
2296 *** Window tree functions are accessible in Elisp.
2297 Functions are provided to return the parent, siblings or child windows
2298 of any window including internal windows (windows not associated with a
2299 buffer) in the window tree.
2301 **** New function `window-valid-p' gives non-nil for live and internal
2304 **** Window manipulation can deal with internal windows.
2305 Many window handling functions like `split-window', `delete-window', or
2306 `delete-other-windows' as well as the window resizing functions can now
2307 act on any window including internal ones.
2309 *** window-total-height/-width vs window-body-height/-width.
2310 The function `window-height' has been renamed to `window-total-height'
2311 and `window-width' has been renamed to `window-body-width'. The old
2312 names are provided as aliases. Two new functions `window-total-width'
2313 and `window-body-height' are provided.
2315 *** Window parameters specific to window handling functions.
2316 For each window you can specify a parameter to override the default
2317 behavior of a number of functions like `split-window', `delete-window'
2318 and `delete-other-windows'. The variable `ignore-window-parameters'
2319 allows to ignore processing such parameters.
2321 *** New semantics of third argument of `split-window'.
2322 The third argument of `split-window' has been renamed to SIDE and can be
2323 set to any of the values 'below, 'right, 'above, or 'left to make the
2324 new window appear on the corresponding side of the window that shall be
2325 split. Any other value of SIDE will cause `split-window' to split the
2326 window into two side-by-side windows as before.
2328 *** Window resizing functions.
2329 A new standard function for resizing windows called `window-resize' has
2330 been introduced. This and all other functions for resizing windows no
2331 longer delete any windows when they become too small.
2333 *** Deleting the selected window now selects the most recently selected
2334 live window on that frame instead.
2336 *** `adjust-window-trailing-edge' adjustments.
2337 `adjust-window-trailing-edge' can now deal with fixed-size windows and
2338 is able to resize other windows if a window adjacent to the trailing
2339 edge cannot be shrunk any more. This makes its behavior more similar to
2340 that of Emacs 21 without compromising, however, its inability to delete
2341 windows which was introduced in Emacs 22.
2343 *** Window-local buffer lists.
2344 Windows now have local buffer lists. This means that removing a buffer
2345 from display in a window will preferably show the buffer previously
2346 shown in that window with its previous window-start and window-point
2347 positions. This also means that the same buffer may be automatically
2348 shown twice even if it already appears in another window.
2350 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2351 which if non-nil requires the buffer to be displayed in the currently
2352 selected window, signaling an error otherwise. If nil, another window
2353 can be used, e.g. if the selected one is strongly dedicated.
2355 *** `split-window-vertically' and `split-window-horizontally' renamed
2356 to `split-window-below' and `split-window-right' respectively.
2357 The old names are kept as aliases.
2361 **** The second arg to `display-buffer' and `pop-to-buffer' is now
2362 named ACTION, and takes a display action of the same form as
2363 `display-buffer-base-action' (see Changes, above). A non-nil,
2364 non-list value is treated specially, as the old meaning.
2366 **** New variable `display-buffer-overriding-action'.
2368 **** The procedure of `display-buffer' etc. to choose a window is
2369 determined by combining `display-buffer-overriding-action',
2370 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2371 and `display-buffer-fallback-action'. The second and fourth of these
2372 are user-customizable variables.
2374 See the docstring of `display-buffer' for details.
2376 *** New functions `window-state-get' and `window-state-put'.
2377 These functions allow to save and restore the state of an arbitrary
2378 frame or window as an Elisp object.
2382 *** New variable `completion-extra-properties' used to specify extra
2383 properties of the current completion:
2384 - :annotate-function, same as the old completion-annotate-function.
2385 - :exit-function, function to call after completion took place.
2387 *** Functions on `completion-at-point-functions' can return any of the
2388 properties valid for `completion-extra-properties'.
2390 *** `completion-annotate-function' is obsolete.
2392 *** New `metadata' method for completion tables. The metadata thus returned
2393 can specify various details of the data returned by `all-completions':
2394 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
2395 used to select a style in completion-category-overrides.
2396 - `annotation-function' to add annotations in *Completions*.
2397 - `display-sort-function' to specify how to sort entries in *Completions*.
2398 - `cycle-sort-function' to specify how to sort entries when cycling.
2400 *** `minibuffer-local-filename-must-match-map' is not used any more.
2401 Instead, the bindings in `minibuffer-local-filename-completion-map'
2402 are combined with `minibuffer-local-must-match-map'.
2404 *** New variable `completing-read-function' allows overriding the
2405 behavior of `completing-read'.
2407 ** `glyphless-char-display' can now distinguish between graphical and
2408 text terminal display, via a char-table entry that is a cons cell.
2410 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
2411 Instead, the offending function is removed.
2415 *** New function `run-hook-wrapped' for running an abnormal hook by
2416 passing the hook functions as arguments to a "wrapping" function.
2417 Like `run-hook-with-args-until-success', it stops at the first
2418 non-nil return value.
2420 *** New macro `with-wrapper-hook' for running an abnormal hook as a
2421 set of "wrapping" filters, similar to around advice.
2422 (A version of this macro was actually added in Emacs 23.2 but was not
2423 advertised at the time.)
2427 *** New macro `condition-case-unless-debug' (this was actually added in
2428 Emacs 23.1 as condition-case-no-debug, but not advertised)
2430 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
2432 *** Variable `stack-trace-on-error' removed.
2434 *** The debugger can now "continue" from an error, which means it will
2435 jump to the error handler as if the debugger had not been invoked
2436 instead of jumping all the way to the top-level.
2438 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
2439 This can be useful when `inhibit-quit' is set.
2441 ** The new function `server-eval-at' allows evaluation of Lisp forms on
2442 named Emacs server instances.
2444 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
2445 to redirect STDOUT to a file.
2447 ** The function `format-time-string' now supports the %N directive,
2448 for higher-resolution time stamps.
2450 ** New input reading functions
2452 *** New function `read-char-choice' reads a restricted set of
2453 characters, discarding any inputs not inside the set.
2455 *** The command `read-color' now requires a match for a color name
2456 or RGB triplet, instead of signaling an error if the user provides
2459 **** `facemenu-read-color' is now an alias for `read-color'.
2461 ** `image-library-alist' is renamed to `dynamic-library-alist'.
2462 The variable is now used to load all kind of supported dynamic libraries,
2463 not just image libraries. The previous name is still available as an
2466 ** Syntax parsing changes
2468 *** New variable `syntax-propertize-function'.
2469 This replaces `font-lock-syntactic-keywords' which is now obsolete.
2470 This allows syntax-table properties to be set independently from font-lock:
2471 just call syntax-propertize to make sure the text is propertized.
2472 Together with this new variable come a new hook
2473 syntax-propertize-extend-region-functions, as well as two helper functions:
2474 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
2475 as-is; and syntax-propertize-rules which provides a new way to specify
2478 *** Syntax tables support a new "comment style c" additionally to style b.
2480 ** New hook `post-self-insert-hook', run after `self-insert-command'.
2482 ** frame-local variables cannot be let-bound any more.
2484 ** Major and minor mode changes
2486 *** `set-auto-mode' now respects mode: local variables at the end of files,
2487 as well as those in the -*- line.
2489 *** `prog-mode' is a new major mode from which programming modes
2492 **** `prog-mode-hook' can be used to enable features for programming
2493 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
2494 on-the-fly spell checking for comments and strings.
2496 *** New hook `change-major-mode-after-body-hook', run by
2497 `run-mode-hooks' just before any other mode hooks.
2499 *** Enabled globalized minor modes can be disabled in specific major modes.
2500 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
2501 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
2503 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
2505 ** File-handling changes
2507 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
2508 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
2509 both non-nil. Interactively, TRASH defaults to t, unless a prefix
2510 argument is supplied (see Trash changes, above).
2512 *** New file predicates: `file-equal-p', `file-in-directory-p'.
2514 ** Tool-bars can display separators.
2515 Tool-bar separators are handled like menu separators in menu-bar maps,
2516 i.e. via menu entries of the form `(menu-item "--")'.
2520 *** Animated images support (currently animated gifs only).
2522 **** `image-animated-p' returns non-nil if an image can be animated.
2524 **** `image-animate' animates a supplied image spec.
2526 **** `image-animate-timer' returns the timer object for an image that
2529 *** `image-extension-data' has been renamed to `image-metadata'.
2530 The old name is an obsolete alias to the new one.
2532 *** Image mode can view any image type that ImageMagick supports.
2533 This requires Emacs to be built with ImageMagick support.
2535 **** New function `imagemagick-types', defined if ImageMagick support
2536 is enabled, returns a list of image file extensions that your
2537 ImageMagick installation supports.
2539 **** New function `imagemagick-register-types' enables ImageMagick
2540 image types in Image mode and in `create-image' and other helper
2543 **** New option `imagemagick-types-inhibit' excludes certain
2544 ImageMagick image types from `imagemagick-register-types'.
2546 **** With ImageMagick support, there are extra Image mode commands to
2547 resize and rotate images: `image-transform-fit-to-height',
2548 `image-transform-fit-to-width', `image-transform-set-rotation', and
2549 `image-transform-set-scale'.
2551 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
2552 passes it to the mail user agent function. This argument specifies an
2553 action for returning to the caller after finishing with the mail. For
2554 example, this is used by Rmail to optionally delete a mail window.
2556 ** XML and HTML parsing
2557 If Emacs is compiled with libxml2 support, there are two new
2558 functions: `libxml-parse-html-region' (which parses "real world" HTML)
2559 and `libxml-parse-xml-region' (which parses XML). Both return an
2560 Emacs Lisp parse tree.
2562 ** Networking and encryption changes
2564 *** `open-network-stream' can now be used to open an encrypted stream.
2565 It now accepts an optional `:type' parameter for initiating a TLS
2566 connection, directly or via STARTTLS. To do STARTTLS, additional
2567 parameters (`:end-of-command', `:success', `:capabilities-command')
2568 must also be supplied.
2570 *** New library gnutls.el.
2571 The new function `gnutls-available-p' returns non-nil if Emacs is
2572 built with GnuTLS support. The main entry points are
2573 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
2574 these functions through `open-network-stream', because that can
2575 upgrade connections through STARTTLS opportunistically or use plain
2576 SSL, depending on your needs. For debugging, set `gnutls-log-level'
2579 *** New primitive `secure-hash' that supports many secure hash algorithms:
2580 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
2581 sha1.el has been removed. The `sha1' feature is provided by default.
2585 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
2587 ** Progress reporters can now "spin".
2588 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
2589 now be nil, or omitted. This makes a "non-numeric" reporter. Each
2590 time you call `progress-reporter-update' on that progress reporter,
2591 with a nil or omitted VALUE argument, the reporter message is
2592 displayed with a "spinning bar".
2594 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
2595 being reverted, even if the buffer has a local `revert-buffer-function'.
2597 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
2598 If delayed-warnings-list is non-nil, the command loop calls
2599 `delayed-warnings-hook' after `post-command-hook'. At present, this
2600 is only used by Emacs on some platforms to display warnings during
2601 startup, which might otherwise not be noticed. This uses the
2602 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
2604 ** rx.el has a new `group-n' construct for explicitly numbered groups.
2606 ** New function `make-composed-keymap' that constructs a new keymap
2607 from multiple input maps. You can use this to make a keymap that
2608 inherits from multiple maps, eg:
2609 (set-keymap-parent newmap (make-composed-keymap othermap parent))
2611 ** New function `string-prefix-p'.
2612 (This was actually added in Emacs 23.2 but was not advertised at the time.)
2614 ** New reader macro ## that stands for the empty symbol.
2615 This means that the empty symbol can now be read back. Also, #: by itself
2616 (when not immediately followed by a possible symbol character) stands for
2617 an empty uninterned symbol.
2619 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
2621 ** The following functions and variables are obsolete:
2623 *** `tooltip-use-echo-area' is obsolete.
2624 Rather than setting this to t, disable Tooltip mode instead.
2626 *** buffer-substring-filters is obsolete.
2627 Use `filter-buffer-substring-functions' instead.
2629 *** `byte-compile-disable-print-circle' is obsolete.
2631 *** `deferred-action-list' and `deferred-action-function' are obsolete.
2632 Use `post-command-hook' instead.
2634 *** `font-lock-maximum-size' is obsolete.
2637 * Changes in Emacs 24.1 on non-free operating systems
2639 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
2640 and also when HOME is set to C:\ by default.
2642 ** New configure.bat options
2644 *** --enable-checking builds Emacs with extra runtime checks.
2646 *** --distfiles specifies files to be included in binary distribution.
2648 *** --without-gnutls disables automatic GnuTLS detection.
2650 *** --lib for general library linkage, works with the USER_LIBS build variable.
2652 ** New make target `dist' to create binary distribution for MS Windows.
2654 ** The Lisp function `w32-default-color-map' is now obsolete.
2655 (It is only used internally in the Emacs C code.)
2657 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
2658 reappear on mouse-over. (Requires OS X 10.6 or later.)
2660 ** On Mac OS X, dragging a file into Emacs visits the file, like on
2661 other platforms, rather than inserting its contents into the buffer.
2664 ----------------------------------------------------------------------
2665 This file is part of GNU Emacs.
2667 GNU Emacs is free software: you can redistribute it and/or modify
2668 it under the terms of the GNU General Public License as published by
2669 the Free Software Foundation, either version 3 of the License, or
2670 (at your option) any later version.
2672 GNU Emacs is distributed in the hope that it will be useful,
2673 but WITHOUT ANY WARRANTY; without even the implied warranty of
2674 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2675 GNU General Public License for more details.
2677 You should have received a copy of the GNU General Public License
2678 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2683 paragraph-separate: "[
\f]*$"