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 24.3
27 ** The default toolkit has been changed to Gtk+ version 3.
28 If you don't pass --with-x-toolkit to configure or if you pass
29 --with-x-toolkit=gtk or --with-x-toolkit=yes, configure will try to build
30 with Gtk+ version 3, and if that fails, try Gtk+ version 2.
31 You can explicitly require a specific version by passing
32 --with-x-toolkit=gtk2 or --with-x-toolkit=gtk3 to configure.
35 ** New configure option '--without-all' to disable additional features.
36 This disables most of the features that are normally enabled by default.
39 ** New configure option '--enable-link-time-optimization' to utilize
40 an appropriate feature provided by GCC since version 4.5.0.
43 ** New configure option '--enable-gcc-warnings', intended for developers.
44 If building with GCC, this enables compile-time checks that warn about
45 possibly-questionable C code. On a recent GNU system there should be
46 no warnings; on older and on non-GNU systems the generated warnings
50 ** The configuration option '--enable-use-lisp-union-type' has been
51 renamed to '--enable-check-lisp-object-type', as the resulting
52 Lisp_Object type no longer uses a union to implement the compile time
53 check that this option enables.
56 ** The configure option '--disable-maintainer-mode' has been removed,
57 as it was confusingly-named and rarely useful.
60 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
61 overwriting "emacs" in the installation bin/ directory with a link
65 ** Emacs uses libtinfo in preference to libncurses, if available.
68 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
69 /usr/pkg/lib to the linker search path. You must add them yourself if
73 ** On Mac OS X, configure no longer automatically adds the Fink /sw
74 directories to the search path. You must add them yourself if you want them.
77 ** The standalone scripts rcs-checkin and vcdiff have been removed
78 (from the bin and libexec directories, respectively). The former is
79 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
82 ** The native Windows user interface is available for Cygwin. Passing
83 --with-w32 will configure a Cygwin emacs to use the Windows user
84 interface instead of the default, X11.
87 * Startup Changes in Emacs 24.3
90 ** Emacs no longer searches for `leim-list.el' files beneath the standard
91 lisp/ directory. There should not be any there anyway. If you have
92 been adding them there, put them somewhere else, eg site-lisp.
95 ** The `--no-site-lisp' command line option now works for Nextstep builds.
98 * Changes in Emacs 24.3
100 ** minibuffer-electric-default-mode can rewrite (default ...) to [...].
101 Just set minibuffer-eldef-shorten-default to t before enabling the mode.
104 ** Most y-or-n prompts now allow you to scroll the selected window.
105 Typing C-v or M-v at a y-or-n prompt scrolls forward or backward
106 respectively, without exiting from the prompt.
109 ** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
110 next and previous path separator, respectively.
114 *** New option `mode-line-default-help-echo' specifies the help text
115 (shown in a tooltip or in the echo area) for any part of the mode line
116 that does not have its own specialized help text.
118 *** You can now click mouse-3 in the coding system indicator to
119 invokes `set-buffer-file-coding-system'.
124 *** `C-h f' (describe-function) can now perform autoloading.
125 When this command is called for an autoloaded function whose docstring
126 contains a key substitution construct, that function's library is
127 automatically loaded, so that the documentation can be shown
128 correctly. To disable this, set `help-enable-auto-load' to nil.
131 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
132 even after their associated libraries have been loaded (and the
133 autoloads have been redefined as functions).
135 ** ImageMagick support, if available, is automatically enabled.
136 It is no longer necessary to call `imagemagick-register-types'
137 explicitly to install ImageMagick image types; that function is called
138 automatically at startup, or when customizing a relevant imagemagick-
141 *** Setting `imagemagick-types-inhibit' to t now disables the use of
142 ImageMagick to view images. You must call imagemagick-register-types
143 afterwards if you do not use customize to change this.
145 *** The new variable `imagemagick-enabled-types' also affects which
146 ImageMagick types are treated as images. The function
147 `imagemagick-filter-types' returns the list of types that will be
150 *** Images displayed via ImageMagick now support transparency and the
151 :background image spec property.
153 ** Server and client changes
155 *** emacsclient now obeys string values for `initial-buffer-choice',
156 if it is told to open a new frame without specifying any file to visit
157 or expression to evaluate.
159 *** New option `server-auth-key' specifies a shared server key.
161 ** In the Package Menu, newly-available packages are listed as "new",
162 and sorted above the other "available" packages by default.
165 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
166 This minor mode replaces `toggle-read-only', which is now obsolete.
168 ** Emacs now generates backtraces on fatal errors.
169 On encountering a fatal error, Emacs now outputs a textual description
170 of the fatal signal, and a short backtrace on platforms like glibc
171 that support backtraces.
174 ** If your Emacs was built from a bzr checkout, the new variable
175 `emacs-bzr-version' contains information about the bzr revision used.
178 ** New variable `create-lockfiles' specifies usage of lockfiles.
179 It defaults to t. Changing it to nil inhibits the creation of lock
180 files (use this with caution).
183 ** Using "unibyte: t" in Lisp source files is obsolete.
184 Use "coding: raw-text" instead.
187 ** Setting `enable-remote-dir-locals' to non-nil allows directory
188 local variables on remote hosts.
191 ** The entry for PCL-CVS has been removed from the Tools menu.
192 The PCL-CVS commands are still available via the keyboard.
194 ** Internationalization changes
196 *** New language environment: Persian.
198 *** New input method `vietnamese-vni'.
200 ** NextStep/OSX port changes.
202 *** OSX 10.4 or newer is required to build Emacs.
204 *** Fullscreen and frame parameter fullscreen is supported.
206 *** A file dialog is used when open/saved is done from the menu/toolbar.
208 * Editing Changes in Emacs 24.3
210 ** Navigation command changes
212 *** New binding `M-g c' for `goto-char'.
214 *** New binding `M-g TAB' for `move-to-column'.
216 *** `M-g TAB' (`move-to-column') prompts for a column number if called
217 interactively with no prefix arg. Previously, it moved to column 1.
219 ** Search and Replace changes
221 *** Non-regexp Isearch now performs "lax" space matching.
222 Each sequence of spaces in the supplied search string may match any
223 sequence of one or more whitespace characters, as specified by the
224 variable `search-whitespace-regexp'. (This variable is also used by a
225 similar existing feature for regexp Isearch).
227 *** New Isearch command `M-s SPC' toggles lax space matching.
228 This applies to both ordinary and regexp Isearch.
230 *** New option `replace-lax-whitespace'.
231 If non-nil, `query-replace' uses flexible whitespace matching too.
234 *** Global `M-s _' starts a symbol (identifier) incremental search,
235 and `M-s _' in Isearch toggles symbol search mode.
236 `M-s c' in Isearch toggles search case-sensitivity.
239 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
240 `ucs-insert' is now an obsolete alias for `insert-char'.
243 ** The `z' key no longer has a binding in most special modes.
244 It used to be bound to `kill-this-buffer', but `z' is too easy to
248 ** New option `delete-trailing-lines' specifies whether
249 M-x delete-trailing-whitespace should delete trailing lines at the end
250 of the buffer. It defaults to t.
254 *** `C-x r +' is now overloaded to invoke `append-to-register.
256 *** New option `register-separator' specifies the register containing
257 the text to put between collected texts for use with M-x
258 append-to-register and M-x prepend-to-register.
261 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
264 ** New command `C-x r M-w' (copy-rectangle-as-kill).
265 It copies the region-rectangle as the last rectangle kill.
267 ** New option `yank-handled-properties' allows processing of text
268 properties on yanked text, in more ways that are more general than
269 just removing them, as done by `yank-excluded-properties'.
272 * Changes in Specialized Modes and Packages in Emacs 24.3
276 *** The faces used by Apropos are now directly customizable.
277 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
278 see the `apropos' Custom group for details.
280 *** The old options whose values specified faces to use were removed
281 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
284 This package has been rewritten to use Tabulated List mode.
286 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
287 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
292 *** You can customize the header text that appears above each calendar month.
293 See the variable `calendar-month-header'.
296 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
299 *** The calendars produced by cal-html include holidays.
300 Customize `cal-html-holidays' to change this.
304 *** CL's main entry is now (require 'cl-lib).
305 `cl-lib' is like the old `cl' except that it uses the namespace cleanly,
306 i.e. all its definitions have the "cl-" prefix (and internal definitions use
309 If `cl' provided a feature under the name `foo', then `cl-lib' provides it
310 under the name `cl-foo' instead, with the exceptions of the few definitions
311 that had to use `foo*' to avoid conflicts with pre-existing Elisp entities,
312 which have not been renamed to `cl-foo*' but just `cl-foo'.
314 The old `cl' is now deprecated and is just a bunch of aliases that
315 provide the old non-prefixed names.
317 *** `cl-flet' is not like `flet' (which is deprecated).
318 Instead it obeys the behavior of Common-Lisp's `flet'.
320 *** `cl-labels' is slightly different from `labels'.
321 The difference is that it relies on the `lexical-binding' machinery (as opposed
322 to the `lexical-let' machinery used previously) to capture definitions in
323 closures, so such closures will only work if `lexical-binding' is in use.
325 *** `progv' was rewritten to use the `let' machinery.
326 A side effect is that vars without corresponding value are bound to nil
327 rather than making them unbound.
331 *** New option `compilation-always-kill'.
335 *** `custom-reset-button-menu' now defaults to t.
337 *** Non-option variables are never matched in `customize-apropos' and
338 `customize-apropos-options' (i.e. the prefix argument does nothing for
343 *** `desktop-path' no longer includes the "." directory. Desktop
344 files are now located in ~/.emacs.d by default.
349 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
352 *** The D-Bus object manager interface is implemented.
355 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
356 if their value does not fit into Emacs's integer range.
359 *** The function `dbus-call-method' works non-blocking now, it can be
360 interrupted by C-g. `dbus-call-method-non-blocking' is obsolete.
363 *** Signals can be sent also as unicast message.
366 *** The argument list of `dbus-register-signal' has been extended,
367 according to the new match rule types of D-Bus. See the manual for
371 *** `dbus-init-bus' supports private connections.
374 *** There is a new function `dbus-setenv'.
378 *** Changes are now highlighted using the same color scheme as in
379 modern VCSes. Deletions are displayed in red (new faces
380 `diff-refine-removed' and `smerge-refined-removed' and new definition
381 of `diff-removed'), insertions in green (new faces `diff-refine-added'
382 and `smerge-refined-added' and new definition of `diff-added').
384 *** The variable `diff-use-changed-face' defines whether to use the
385 face `diff-changed', or `diff-removed' and `diff-added' to highlight
386 changes in context diffs.
388 *** The new command `diff-remove-trailing-whitespace' fixes trailing
389 whitespace problems introduced by the diff.
393 *** `dired-do-async-shell-command' executes each file sequentially
394 if the command ends in `;' (when operating on multiple files).
395 Otherwise, it executes the command on each file in parallel.
397 *** Typing M-n in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
398 `dired-do-chown', `dired-do-touch' pulls the file attributes of the
401 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
402 `DEL' (`dired-unmark-backward'), `d' (`dired-flag-file-deletion')
403 mark/unmark/flag all files in the active region.
405 *** The minibuffer default for `=' (`dired-diff) has changed.
406 It is now the backup file for the file at point, if one exists.
407 In Transient Mark mode the default is the file at the active mark.
409 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
410 The global binding for `M-=', `count-words-region' is in effect.
412 ** Ediff now uses the same color scheme as Diff mode.
414 ** erc will look up server/channel names via auth-source and use the
415 channel keys found, if any.
417 ** Flymake uses fringe bitmaps to indicate errors and warnings.
418 See flymake-fringe-indicator-position, flymake-error-bitmap and
419 flymake-warning-bitmap.
423 *** The obsolete variable `follow-mode-off-hook' has been removed.
425 *** Follow mode no longer works by using advice.
426 The option `follow-intercept-processes' has been removed.
430 *** The option `ffap-url-unwrap-remote' can now be a list of strings,
431 specifying URL types which should be converted to remote file names at
432 the FFAP prompt. The default is now '("ftp").
435 `javascript-generic-mode' is now an obsolete alias for `js-mode'.
439 *** New `derived-mode' filter, bound to `/ M'.
440 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
442 ** Mouse Avoidance mode
444 The new variable `mouse-avoidance-banish-position' can now be used to
445 customize Mouse Avoidance mode further.
448 ** notifications.el supports now version 1.2 of the Notifications API.
449 The function `notifications-get-capabilities' returns the supported
452 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
453 closing brackets to be aligned with the line of the opening bracket.
455 ** In Proced mode, new command `proced-renice' renices marked processes.
459 A new version of python.el, which provides several new features, including:
460 per-buffer shells, better indentation, Python 3 support, and improved
461 shell-interaction compatible with iPython (and virtually any other
464 *** Some user options have been replaced/renamed:
465 Old defcustom: | New defcustom:
466 python-indent | python-indent-offset
467 python-guess-indent | python-indent-guess-indent-offset
468 python-pdbtrack-do-tracking-p | python-pdbtrack-activate
469 python-use-skeletons | python-skeleton-autoinsert
471 *** Some user options have been removed:
473 **** `python-indent-string-contents': Strings are never indented.
475 **** `python-honour-comment-indentation':
476 Comments are never considered as indentation markers themselves.
478 **** `python-continuation-offset': Indentation is automatically
479 calculated in a pep8 compliant way depending on the context.
481 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
482 Have no direct mapping as the shell interaction is completely different.
484 **** `python-python-command', `python-jython-command':
485 Replaced by `python-shell-interpreter'.
487 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
488 `python-pdbtrack-minor-mode-string', `python-source-modes':
491 *** Some commands have been replaced:
492 Old command | New command
493 python-insert-class | python-skeleton-class
494 python-insert-def | python-skeleton-def
495 python-insert-for | python-skeleton-for
496 python-insert-if | python-skeleton-if
497 python-insert-try/except | python-skeleton-try
498 python-insert-try/finally | python-skeleton-try
499 python-insert-while | python-skeleton-while
500 python-find-function | python-nav-jump-to-defun
501 python-next-statement | python-nav-forward-sentence
502 python-previous-statement | python-nav-backward-sentence
503 python-send-buffer | python-shell-send-buffer
504 python-send-defun | python-shell-send-defun
505 python-send-region | python-shell-send-region
506 python-send-region-and-go | Emulate with python-shell-send-region and
507 python-shell-switch-to-shell
508 python-send-string | python-shell-send-string
509 python-switch-to-python | python-shell-switch-to-shell
510 python-describe-symbol | python-eldoc-at-point
512 ** reStructuredText mode
514 *** Rebind nearly all keys making room for more keys and complying
515 better to usage in other modes. Describe bindings with C-c C-h.
517 *** Major revision of indentation working very similar to other
518 modes. TAB is your friend.
520 *** Major revision of filling working fine with most of
521 reStructuredText syntax. Support auto-filling.
523 *** Major revision of comment handling.
525 *** Major revision of fontification working with `jit-lock-mode'.
527 *** Cover reStructuredText syntax more closely. Improve
528 the experience for Sphinx users.
530 *** `rst-insert-list' inserts new list or continues existing lists.
532 *** Extend correct and improve customization.
534 *** Negative prefix argument always works for `rst-adjust'.
536 *** Reset window configuration after displaying TOC.
538 *** Package version in `rst-version'.
540 *** Support `imenu' and `which-func'.
544 *** Pairing of parens/quotes uses electric-pair-mode instead of skeleton-pair.
546 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
548 *** `sh-use-smie' lets you choose a new indentation and navigation code.
552 *** New option `async-shell-command-buffer' specifies what buffer to use
553 for a new asynchronous shell command when the default output buffer
554 `*Async Shell Command*' is already taken by another running command.
558 *** DB2 added `sql-db2-escape-newlines'
560 If non-nil, newlines sent to the command interpreter will be escaped
561 by a backslash. The default does not escape the newlines and assumes
562 that the sql statement will be terminated by a semicolon.
564 ** Tabulated List and packages derived from it
566 *** New command `tabulated-list-sort', bound to `S', sorts the column
567 at point, or the Nth column if a numeric prefix argument is given.
571 The variables `term-default-fg-color' and `term-default-bg-color' are
572 now deprecated in favor of the `term-face' face, that you can
573 customize. Also, it is now possible to customize how are displayed the
574 ANSI terminal colors and styles by customizing the corresponding
575 `term-color-<COLOR>', `term-color-underline' and `term-color-bold'
580 *** The syntax has been extended in order to allow ad-hoc proxy
581 definitions. See the manual for details.
583 *** Remote processes are now supported also on remote Windows host.
587 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
588 Previously, this slot stored semicolon-separated attribute-value pairs
589 appended to some imap URLs, but this is not compatible with RFC 3986.
590 So now the `filename' slot stores the entire path and query components
591 and the `attributes' slot is always nil.
593 *** New function `url-encode-url' for encoding a URI string.
594 The `url-retrieve' function now uses this to encode its URL argument,
595 in case that is not properly encoded.
599 *** The free software compiler GHDL is supported (and now the default).
601 *** Support for the VHDL-AMS packages has been added/updated.
603 *** Updated to the 2002 revision of the VHDL standard.
605 *** Accepts \r and \f as whitespace.
607 ** which-function-mode now applies to all applicable major modes by default.
610 ** winner-mode-hook now runs when the mode is disabled, as well as when it is
613 ** FIXME something happened to ses.el, 2012-04-17.
616 ** Obsolete packages:
619 In most cases, assoc+member+push+delq work just as well.
620 And in any case it's just a terrible package: ugly semantics, terrible
621 inefficiency, and not namespace-clean.
636 * New Modes and Packages in Emacs 24.3
638 * Incompatible Lisp Changes in Emacs 24.3
640 ** set-buffer-multibyte now signals an error in narrowed buffers.
643 ** (random) by default now returns a different random sequence in
644 every Emacs run. Use (random S), where S is a string, to set the
645 random seed to a value based on S, in order to get a repeatable
646 sequence in later calls.
649 ** The function `x-select-font' can return a font spec, instead of a
650 font name as a string. Whether it returns a font spec or a font name
651 depends on the graphical library.
653 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
654 that substring is inserted literally even if the LITERAL arg is
655 non-nil, instead of causing an error to be signaled.
658 ** Docstrings starting with `*' no longer indicate user options.
659 Only variables defined using `defcustom' are considered user options.
660 The function `user-variable-p' is now an obsolete alias for
664 ** The return values of `defalias', `defun' and `defmacro' have changed,
665 and are now undefined. For backwards compatibility, defun and
666 defmacro currently return the name of the newly defined function/macro
667 but this should not be relied upon.
670 ** `face-spec-set' no longer sets frame-specific attributes when the
671 third argument is a frame (that usage was obsolete since Emacs 22.2).
674 ** The arguments of `dbus-register-signal' are no longer just strings,
675 but keywords or keyword-string pairs. The old argument list will
676 still be supported for Emacs 24.x.
679 Some Lisp symbols have been renamed to avoid problems with spelling
680 that is incorrect or inconsistent with how Emacs normally spells a word.
682 *** Renamed functions
684 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
685 **** inactivate-input-method -> deactivate-input-method
686 **** quail-inactivate -> quail-deactivate
687 **** robin-inactivate -> robin-deactivate
688 **** viper-inactivate-input-method -> viper-deactivate-input-method
689 **** viper-inactivate-input-method-action ->
690 viper-deactivate-input-method-action
691 **** ucs-input-inactivate -> ucs-input-deactivate
694 The old hooks are still supported for backward compatibility, but they
695 are deprecated and will be removed eventually.
697 **** input-method-inactivate-hook -> input-method-deactivate-hook
698 **** robin-inactivate-hook -> robin-deactivate-hook
699 **** quail-inactivate-hook -> quail-deactivate-hook
701 *** Renamed Lisp variables
703 **** follow-deactive-menu -> follow-inactive-menu
704 **** inactivate-current-input-method-function ->
705 deactivate-current-input-method-function
707 ** Some obsolete functions, variables, and faces were removed:
709 *** `facemenu-unlisted-faces'
710 *** `rmail-decode-mime-charset'
711 *** `last-input-char', `last-command-char', `unread-command-char'.
712 *** `iswitchb-read-buffer'
713 *** `sc-version', `sc-submit-bug-report'
714 *** `set-char-table-default'
715 *** `string-to-sequence' (use `string-to-list' or `string-to-vector').
716 *** `compile-internal'
717 *** `mode-line-inverse-video'
718 *** `cvs-commit-buffer-require-final-newline'
719 (use `log-edit-require-final-newline' instead)
720 *** `cvs-changelog-full-paragraphs'
721 (use `log-edit-changelog-full-paragraphs' instead)
722 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
723 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
724 *** `vc-master-templates' (use `vc-handled-backends' instead)
725 *** `vc-checkout-carefully'
729 * Lisp changes in Emacs 24.3
731 ** New sampling-based Elisp profiler.
732 Try M-x profiler-start ... M-x profiler-stop; and then M-x profiler-report.
733 The sampling rate can be based on CPU time (only supported on some
734 systems), or based on memory allocations.
736 ** CL-style generalized variables are now in core Elisp.
737 `setf' is autoloaded; `push' and `pop' accept generalized variables.
739 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
740 The interpretation of the DECLS is determined by `defun-declarations-alist'.
744 *** New function `completion-table-with-quoting' to handle completion
745 in the presence of quoting, such as file completion in shell buffers.
747 *** New function `completion-table-subvert' to use an existing completion
748 table, but with a different prefix.
752 *** New error type and new function `user-error'.
753 These do not trigger the debugger.
755 *** New option `debugger-bury-or-kill'.
757 *** Set `debug-on-message' to enter the debugger when a certain
758 message is displayed in the echo area. This can be useful when trying
759 to work out which code is doing something.
761 *** New var `inhibit-debugger', automatically set to prevent accidental
762 recursive invocations.
766 *** `read-regexp' has a new argument HISTORY; the first argument PROMPT
767 of `read-regexp' accepts a string ending with a colon and space, and its
768 second argument DEFAULTS can be a list of strings accessible via M-n
769 in the minibuffer ahead of other hard-coded useful regexp-related values.
770 More commands use `read-regexp' now to read their regexp arguments.
774 *** The functions get-lru-window, get-mru-window and get-largest-window
775 now accept a third argument to avoid choosing the selected window.
777 *** Additional values recognized for option `window-combination-limit'.
779 *** New macro `with-temp-buffer-window'.
781 *** `temp-buffer-resize-mode' no longer resizes windows that have been
784 *** New function `fit-frame-to-buffer' and new options
785 `fit-frame-to-buffer' and `fit-frame-to-buffer-bottom-margin'.
787 *** New display action functions `display-buffer-below-selected',
788 `display-buffer-at-bottom' and `display-buffer-in-previous-window'.
790 *** New display action alist entry `inhibit-switch-frame', if non-nil,
791 tells display action functions to avoid changing which frame is
794 *** New display action alist entry `pop-up-frame-parameters', if
795 non-nil, specifies frame parameters to give any newly-created frame.
797 *** New display action alist entry `previous-window', if non-nil,
798 specifies window to reuse in `display-buffer-in-previous-window'.
800 *** New display action alist entries `window-height' and `window-width'
801 to specify size of new window created by `display-buffer'.
803 *** The following variables are obsolete, as they can be replaced by
804 appropriate entries in the `display-buffer-alist' function introduced
807 **** `display-buffer-reuse-frames'
808 **** `special-display-regexps'
809 **** `special-display-frame-alist'
810 **** `special-display-buffer-names'
811 **** `special-display-function'
812 **** `display-buffer-function'
813 **** `dired-shrink-to-fit'
817 *** `current-time-string' no longer requires that its argument's year
818 must be in the range 1000..9999. It now works with any year supported
819 by the underlying C implementation.
821 *** `current-time' now returns extended-format time stamps
822 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
823 PSEC is typically a multiple of 1000 on current machines. Other
824 functions that use this format, such as file-attributes and
825 format-time-string, have been changed accordingly. Old-format time
826 stamps are still accepted.
828 *** The format of timers in timer-list and timer-idle-list is now
829 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
830 The PSECS slot is new, and uses picosecond resolution. It can be
831 accessed via the new timer--psecs accessor.
834 ** Floating point functions now always return special values like NaN,
835 instead of signaling errors, if given invalid args, e.g. (log -1.0).
836 Previously, they returned NaNs on some platforms but signaled errors
837 on others. The affected functions are acos, asin, tan, exp, expt,
838 log, log10, sqrt, and mod.
840 ** Interpreted files are eagerly macro-expanded during load.
841 This can significantly speed up execution of non-byte-compiled code,
842 but can also bump into harmless and previously unnoticed cyclic
843 dependencies. These should not be fatal: they will simply cause the
844 macro-calls to be left for later expansion (as before), but will also
845 result in a warning ("Eager macro-expansion skipped due to cycle")
846 describing the cycle.
848 ** Miscellaneous new functions:
851 *** `autoload-do-load'.
853 *** `buffer-narrowed-p' tests if the buffer is narrowed.
854 *** `file-name-base' returns a file name sans directory and extension.
855 *** `function-get' fetches a function property, following aliases.
857 *** `posnp' tests if an object is a `posn'.
858 *** `set-temporary-overlay-map' sets up a temporary overlay map.
860 *** `system-users' returns the user names on the system.
862 *** `system-groups' returns the group names on the system.
863 *** `tty-top-frame' returns the topmost frame of a text terminal.
865 ** New macros `setq-local' and `defvar-local'.
867 ** New fringe bitmap `exclamation-mark'.
869 ** Face underlining can now use a wave.
870 See the "Face Attributes" section of the Elisp manual.
872 ** The following functions and variables are obsolete:
874 *** `automount-dir-prefix'
875 *** `buffer-has-markers-at'
876 *** `macro-declaration-function' (use `macro-declarations-alist').
877 *** `window-system-version'
878 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
879 *** `query-replace-interactive'
882 * Changes in Emacs 24.3 on non-free operating systems
884 ** New configure.bat options on MS-Windows:
886 *** --without-libxml2 omits support for libxml2, even if its presence
889 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
890 Emacs now supports mouse highlight, help-echo (in the echo area), and
891 mouse-autoselect-window.
893 ** Two new functions are available in Cygwin builds of Emacs:
894 cygwin-convert-path-from-windows and cygwin-convert-path-to-windows.
895 These functions allow Lisp code to access the Cygwin file-name mapping
896 machinery to convert between Cygwin and Windows-native file names.
898 ** On MS-Windows Vista and later Emacs now supports symbolic links.
900 * Changes in Emacs 24.2
902 ** This is mainly a bug-fix release.
905 * Installation Changes in Emacs 24.1
907 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
908 to configure. Note that other libraries used by Emacs, RSVG and GConf,
909 also depend on Gtk+. You can disable them with --without-rsvg and
912 ** Emacs can be compiled with GnuTLS support.
913 This happens by default if a suitably recent version of the library is
914 found at build time. To prevent this, use the configure option
915 `--without-gnutls'. See below for GnuTLS features.
917 ** Emacs can be compiled with SELinux support.
918 This happens by default if a suitably recent version of the library is
919 found at build time. To prevent this, use the configure option
920 `--without-selinux'. See below for SELinux features.
922 ** Emacs can be compiled with ImageMagick support.
923 This happens by default if a suitably recent version of the library is
924 found at build time. To prevent this, use the configure option
925 `--without-imagemagick'. See below for ImageMagick features.
926 This feature is not available for the Nextstep or MS ports.
928 ** Emacs can be compiled with libxml2 support.
929 This happens by default if a suitably recent version of the library is
930 found at build time. To prevent this, use the configure option
931 `--without-xml2'. See below for libxml2 features.
933 ** By default, the installed Info and man pages are compressed.
934 You can disable this by configuring --without-compress-info.
936 ** New configure option --with-wide-int.
937 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
938 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
941 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
942 These provide no new functionality, they just remove the need to edit
943 lib-src/Makefile by hand in order to use the associated features.
945 ** New configure option --enable-use-lisp-union-type.
946 This is only useful for Emacs developers to debug certain types of bugs.
947 This is not a new feature; only the configure flag is new.
949 ** The standalone programs digest-doc and sorted-doc are removed.
950 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
952 ** The standalone program `fakemail' is removed.
953 If you need it, feedmail.el provides a superset of the functionality.
956 * Startup Changes in Emacs 24.1
958 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
959 command line arguments, and the EMACS_UNIBYTE environment variable, no
960 longer have any effect. (They were declared obsolete in Emacs 23.)
962 ** New command line option `--no-site-lisp' removes site-lisp directories
963 from load-path. -Q now implies this. This option does not affect the
964 EMACSLOADPATH environment variable (and hence has no effect for
968 * Changes in Emacs 24.1
972 *** Many packages now use the `completion-at-point' command,
973 rather than implementing separate completion commands.
975 *** `completion-at-point' now handles tags and semantic completion.
977 *** Completion in a non-minibuffer now tries to detect the end of completion
978 and pops down the *Completions* buffer accordingly.
980 *** New option `completion-cycle-threshold' allows completion cycling.
982 *** New option `completion-category-overrides' for overriding the
983 default completion style in certain circumstances.
985 *** New completion style `substring'.
987 *** Completion of buffer names uses `substring' completion by default.
989 *** The option `widget-complete-field' has been removed.
993 *** The first time you try sending mail, Emacs asks for a mail method.
994 This is implemented by a new default for `send-mail-function', which
995 is `sendmail-query-once'. This offers to use the smtpmail package, or
996 to use the old defaults relying on external mail facilities
997 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
998 `mailclient-send-it' on Windows).
1000 *** Typing C-c m in the buffer made by M-x report-emacs-bug transfers
1001 the report to your desktop's preferred mail client, if there is one.
1002 This uses either the "xdg-email" utility, or Mac OS's "open" command.
1004 *** See Changes in Specialized Modes and Packages for SMTPmail changes
1005 and Mail mode changes
1007 ** Emacs server and client changes
1009 *** New option `server-port' specifies the port for TCP Emacs servers.
1011 *** New emacsclient argument -q/--quiet suppresses some status messages.
1013 *** New emacsclient argument --frame-parameters specifies the frame
1014 parameters of any newly-created graphical frame.
1016 *** If emacsclient shuts down due to Emacs signaling an error,
1017 its exit status is 1.
1019 *** New emacsclient argument --parent-id ID.
1020 This opens a client frame in parent X window ID, via XEmbed, similar
1021 to the --parent-id argument to Emacs.
1023 ** Internationalization changes
1025 *** Emacs now supports display and editing of bidirectional text.
1026 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1027 displayed in the correct visual order as expected by users of those
1028 scripts. The display reordering is a "full bidirectionality" class
1029 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1030 with no RTL text should look exactly the same as before.
1032 **** New buffer-local variable `bidi-display-reordering'.
1033 To disable display reordering in a buffer, change this to nil.
1035 **** New buffer-local variable `bidi-paragraph-direction'.
1036 If nil (the default), Emacs determines the base direction of each
1037 paragraph from its text, as specified by the UBA. Setting the value
1038 to `right-to-left' or `left-to-right' forces a base direction on each
1041 Paragraphs with right-to-left base direction are displayed starting at
1042 the right window edge.
1044 *** Enhanced support for characters with no glyphs in available fonts,
1045 or, on text terminals, characters that cannot be encoded by the
1046 terminal coding system. The new option `glyphless-char-display-control'
1047 specifies how to display them: as a hexadecimal code in a box, a thin
1048 1-pixel space, an empty box, etc.
1050 *** New input methods for Farsi and Bulgarian
1051 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
1053 *** `nobreak-char-display' now also highlights Unicode hyphen chars
1054 (U+2010 and U+2011).
1056 *** New Hebrew translation of the Emacs Tutorial.
1057 Type `C-u C-h t' to choose it in case your language setup doesn't
1058 automatically select it.
1060 ** An Emacs Lisp package manager is now included.
1061 This is a convenient way to download and install additional packages,
1062 from a package repository at http://elpa.gnu.org.
1064 *** M-x list-packages shows a list of packages, which can be
1065 selected for installation.
1067 *** New command `describe-package', bound to `C-h P'.
1069 *** By default, all installed packages are loaded automatically when
1070 Emacs starts up. To disable this, set `package-enable-at-startup' to
1071 nil. To specify the packages to load, customize `package-load-list'.
1073 ** Custom theme changes
1075 *** New command `M-x customize-themes', which provides a convenient
1076 interface for enabling and disabling Custom themes.
1078 *** New option `custom-theme-load-path' is the load path for themes.
1079 Emacs no longer looks for Custom themes in `load-path'. The default
1080 value of `custom-theme-load-path' says to look for themes in
1081 `custom-theme-directory', followed by a subdirectory of
1082 `data-directory' named "themes/", which contains a small selection of
1083 built-in Custom themes.
1085 *** New option `custom-safe-themes' records known-safe theme files.
1086 If a theme is not in this list, Emacs queries before loading it, and
1087 offers to save the theme to `custom-safe-themes' automatically. By
1088 default, all themes included in Emacs are treated as safe.
1090 ** Improved GTK integration
1092 *** GTK scroll-bars are now placed on the right by default.
1093 The function `set-scroll-bar-mode' can change this.
1095 *** GTK tool bars can have just text, just images or images and text.
1096 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
1097 the default is taken from desktop settings.
1099 *** GTK tool bars can be placed on any edge of the frame.
1100 The frame-parameter tool-bar-position controls this. It takes the
1101 values top, left, right or bottom. The Options => Show/Hide menu has
1104 *** The default colors for selected text (the `region' face) are taken
1105 from the GTK theme when Emacs is built with GTK.
1107 *** Emacs uses GTK tooltips by default if built with GTK.
1108 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
1110 ** Graphical interface changes
1112 *** On graphical displays, the mode-line no longer ends in dashes.
1113 Also, the first dash (which does not indicate anything) is just
1114 displayed as a space.
1116 *** `menu-bar-select-buffer-function' lets you choose another operation
1117 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
1119 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
1120 built with Xft. These fonts can be set via X resources, for example:
1121 Emacs.pane.menubar.font: Courier-12
1125 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
1126 or if it receives a SIGINT signal in batch mode.
1128 *** `kill-emacs-hook' is now also run in batch mode.
1129 Third-party code which adds to `kill-emacs-hook' should check if they
1130 do the right thing in batch mode.
1132 ** Scrolling changes
1134 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
1135 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
1136 of buffer at first key-press (instead they move to top/bottom of buffer)
1137 when `scroll-error-top-bottom' is non-nil.
1139 *** New option `scroll-error-top-bottom' (see above).
1141 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
1142 scroll a line instead of full screen.
1144 *** New property `scroll-command' should be set on a command's symbol to
1145 define it as a scroll command affected by `scroll-preserve-screen-position'.
1147 *** If you customize `scroll-conservatively' to a value greater than 100,
1148 Emacs will never recenter point in the window when it scrolls due to
1149 cursor motion commands or commands that move point (e.f., `M-g M-g').
1150 Previously, you needed to use `most-positive-fixnum' as the value of
1151 `scroll-conservatively' to achieve the same effect.
1153 *** "Aggressive" scrolling now honors the scroll margins.
1154 If you customize `scroll-up-aggressively' or
1155 `scroll-down-aggressively' and move point off the window, Emacs now
1156 scrolls the window so as to avoid positioning point inside the scroll
1159 ** Basic SELinux support has been added.
1160 This requires Emacs to be linked with libselinux at build time.
1162 *** Emacs preserves the SELinux file context when backing up.
1163 Also, the function `copy-file' has an extra optional argument for
1164 preserving SELinux context, and the return value of `backup-buffer'
1165 now includes the SELinux context.
1167 *** New functions `file-selinux-context' and `set-file-selinux-context'
1168 get and set the SELinux context of a file.
1172 *** `delete-by-moving-to-trash' now only affects commands that specify
1173 trashing. This avoids inadvertently trashing temporary files.
1175 *** Calling `delete-file' or `delete-directory' with a prefix argument
1176 now forces true deletion, regardless of `delete-by-moving-to-trash'.
1178 ** File- and directory-local variable changes
1180 *** You can stop directory local vars from applying to subdirectories.
1181 Add an element (subdirs . nil) to the alist portion of any variables
1182 settings to indicate that the section should not apply to
1185 *** Directory local variables can apply to some file-less buffers.
1186 Affected modes include dired, vc-dir, and log-edit. For example,
1187 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
1188 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
1189 `hack-dir-local-variables-non-file-buffer' to support this.
1191 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
1192 Instead, use "eval: (minor-mode 1)".
1194 *** The variable `inhibit-first-line-modes-regexps' has been renamed
1195 to `inhibit-local-variables-regexps'. As the name suggests, it now
1196 applies to ALL file local variables, not just -*- lines. The
1197 associated `inhibit-first-line-modes-suffixes' has been renamed in the
1202 *** The `quit-window' command now restores the last buffer displayed
1203 in the quitted window.
1205 *** Resizing an Emacs frame now preserves proportional window sizes,
1206 modulo restrictions like window minimum sizes and fixed-size windows.
1208 *** The behavior of `display-buffer' is now customizable in detail.
1210 **** New option `display-buffer-base-action' specifies a list of
1211 user-determined display "actions" (functions and optional arguments
1212 for choosing the displaying window).
1214 This takes precedence over the default display action, which is
1215 specified by `display-buffer-fallback-action'.
1217 **** New option `display-buffer-alist' maps buffer name regexps to
1218 display actions, taking precedence over `display-buffer-base-action'.
1220 *** New option `window-combination-limit'.
1221 The new option `window-combination-limit' allows to return the space
1222 obtained for resizing or creating a window more reliably to the window
1223 from which such space was obtained.
1225 *** New option `window-combination-resize'.
1226 The new option `window-combination-resize' allows to split a window that
1227 otherwise cannot be split because it's too small by stealing space from
1228 other windows in the same combination. Subsequent resizing or deletion
1229 of the window will resize all windows in the same combination as well.
1231 *** New option `frame-auto-hide-function' lets you choose between
1232 iconifying or deleting a frame when burying a buffer in a dedicated
1233 frame, or quitting a window showing a buffer in a frame of its own.
1235 *** New commands `maximize-window' and `minimize-window'.
1236 These maximize and minimize the size of a window within its frame.
1238 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
1239 These functions allow to navigate through the live buffers that have
1240 been shown in a specific window.
1242 ** Minibuffer changes
1244 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
1245 This is handy for minibuffer-only frames, and is also used for the feature
1246 where mouse-1 pops up *Messages*"', which can now easily be changed.
1248 *** Minibuffers set `truncate-lines' to nil.
1249 If you want to change the value to something else, you could use
1250 for example `minibuffer-setup-hook'.
1252 ** `auto-mode-case-fold' is now enabled by default.
1254 ** `backup-by-copying-when-mismatch' now defaults to t.
1256 ** New basic faces `error', `warning', `success'.
1257 These are used to highlight text indicating failure, caution or
1258 successful operation.
1260 ** New option `list-colors-sort' defines the color sort order
1261 for `list-colors-display'.
1263 ** The variable `focus-follows-mouse' now always defaults to nil.
1266 * Editing Changes in Emacs 24.1
1270 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
1271 `isearch-yank-line'.
1273 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
1274 `isearch-yank-kill'.
1276 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
1278 ** New commands `count-words-region' and `count-words'.
1280 *** M-= is bound to `count-words-region', not `count-lines-region'.
1281 The `count-words-region' command, when called interactively, reports
1282 the number of lines, words, and characters in the region. It is a
1283 superset of the old `count-lines-region', which is now an obsolete
1286 ** The command `just-one-space' (M-SPC), if given a negative argument,
1287 also deletes newlines around point.
1291 *** New option `delete-active-region'.
1292 If non-nil, [delete] and DEL delete the region if it is active and no
1293 prefix argument is given. If set to `kill', those commands kill
1296 *** New command `delete-forward-char', bound to [delete].
1297 This is meant for interactive use, and obeys `delete-active-region'.
1298 The command `delete-char' does not obey `delete-active-region'.
1300 *** `delete-backward-char' is now a Lisp function.
1301 Apart from obeying `delete-active-region', its behavior is unchanged.
1302 However, the byte compiler now warns if it is called from Lisp; Lisp
1303 callers should use delete-char with a negative argument instead.
1305 *** The option `mouse-region-delete-keys' has been deleted.
1307 ** Selection changes.
1309 The default handling of clipboard and primary selections has been
1310 changed to conform with modern X applications. In short, most
1311 commands for killing and yanking text now use the clipboard, while
1312 mouse commands use the primary selection.
1314 In the following, we provide a list of these changes, followed by a
1315 list of steps to get the old behavior back if you prefer that.
1317 *** `select-active-regions' now defaults to t.
1318 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
1319 the kill ring. The selected text is put in the primary selection, if
1320 the system possesses a separate primary selection facility (e.g. X).
1322 **** `select-active-regions' also accepts a new value, `only'.
1323 This means to only set the primary selection for temporarily active
1324 regions (usually made by mouse-dragging or shift-selection);
1325 "ordinary" active regions, such as those made with C-SPC followed by
1326 point motion, do not alter the primary selection.
1328 **** `mouse-drag-copy-region' now defaults to nil.
1330 *** mouse-2 is now bound to `mouse-yank-primary'.
1331 This pastes from the primary selection, ignoring the kill-ring.
1332 Previously, mouse-2 was bound to `mouse-yank-at-click'.
1334 *** `x-select-enable-clipboard' now defaults to t on all platforms.
1336 *** `x-select-enable-primary' now defaults to nil.
1337 Thus, commands that kill text or copy it to the kill-ring (such as
1338 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
1340 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
1341 exactly equivalent to M-w, C-w, and C-y respectively.
1343 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
1344 non-nil by default, as Windows does not support the primary selection
1345 between applications.
1347 *** To return to the previous behavior, do the following:
1349 **** Change `select-active-regions' to nil.
1350 **** Change `mouse-drag-copy-region' to t.
1351 **** Change `x-select-enable-primary' to t (on X only).
1352 **** Change `x-select-enable-clipboard' to nil.
1353 **** Bind `mouse-yank-at-click' to mouse-2.
1355 *** Support for X cut buffers has been removed.
1357 *** X clipboard managers are now supported.
1358 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
1360 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
1361 in the current rectangle. With a prefix argument, this prompts for a
1362 number to count from and for a format string.
1364 ** `redisplay-dont-pause' now defaults to t.
1365 This makes Emacs feel more responsive to editing commands that arrive
1366 at high rate, e.g. if you lean on some key, because stopping redisplay
1367 in the middle (when this variable is nil) forces more expensive
1368 updates later on, and Emacs appears to be unable to keep up.
1370 ** The behavior of <TAB> for active regions in Text mode has changed.
1371 In Text and related modes, typing <TAB> (`indent-for-tab-command')
1372 when the region is active causes Emacs to indent all the lines in the
1373 region, aligning them with the line previous to the first line in the
1374 region (or with the left margin if there is no previous line).
1376 ** When `occur' is called with a prefix argument, matching strings are
1377 collected into the `*Occur*' buffer without line numbers. If there
1378 are parenthesized subexpressions in the specified regexp, `occur'
1379 reads replacement text that may contain \\& and \\N whose convention
1380 follows `replace-match'.
1383 * Changes in Specialized Modes and Packages in Emacs 24.1
1385 ** Archive Mode has basic support for browsing and updating 7z archives.
1389 *** BibTeX mode now supports biblatex.
1390 Use the variable `bibtex-dialect' to select different BibTeX dialects.
1391 `bibtex-entry-field-alist' is now an obsolete alias for
1392 `bibtex-BibTeX-entry-alist'.
1394 *** New command `bibtex-search-entries', bound to C-c C-a.
1396 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
1398 *** New variable `bibtex-search-entry-globally'.
1402 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
1404 *** The default browser used by the package is now the "xdg-open" program,
1405 on platforms that support it. This calls your desktop's preferred browser.
1407 ** Calendar, Diary, and Appt
1409 *** Diary entries can contain non-printing "comments".
1410 See the variable `diary-comment-start'.
1412 *** Appointments can specify their individual warning times.
1413 See the variable `appt-warning-time-regexp'.
1415 *** The function specified by `appt-disp-window-function' may be passed
1416 lists of arguments if multiple appointments are due at similar times.
1417 If you are using a custom function for this, you should update it.
1419 *** New function `diary-hebrew-birthday'.
1421 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
1422 may no longer be nil, but must all be strings.
1424 *** The obsolete (since Emacs 22.1) method of enabling the appt
1425 package by adding `appt-make-list' to `diary-hook' has been removed.
1426 Use `appt-activate' instead.
1428 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
1429 appt-issue-message (use the function appt-activate)
1430 appt-visible/appt-msg-window (use the variable appt-display-format)
1432 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
1433 view-diary-entries, list-diary-entries, show-all-diary-entries
1437 *** New feature to "guess" the style in an existing buffer.
1438 The main entry point is M-x c-guess.
1440 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
1442 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
1443 Thus C-M-a will, by default, go to the beginning of the immediate function,
1446 *** "Macros with semicolons" can be registered for correct indentation.
1447 Where such a macro ends a line (no semicolon) the next statement is no longer
1448 parsed as a statement continuation.
1450 ** Comint and modes derived from it use the standard completion code.
1454 *** Compilation mode can be used without Font Lock mode.
1455 `compilation-parse-errors-function' is now obsolete.
1457 *** New variable `compilation-filter-start', which is bound while
1458 `compilation-filter-hook' runs. It records the start position of the
1459 text inserted by `compilation-filter'.
1461 *** `compilation-error-screen-columns' and `compilation-first-column'
1462 are obeyed in the editing buffer. So programming language modes can
1463 set them, whereas previously only the value in the *Compilation*
1468 *** Customize buffers now contain a search field.
1469 The search is performed using `customize-apropos'.
1470 To turn off the search field, set `custom-search-field' to nil.
1472 *** Options in customize group buffers start out hidden if not customized.
1473 Use the arrow to the left of the option name to toggle visibility.
1475 *** custom-buffer-sort-alphabetically now defaults to t.
1477 *** The color widget now has a "Choose" button, which allows you to
1478 choose a color via `list-colors-display'.
1482 *** It is now possible to access buses other than the default system
1485 *** The `dbus-register-method' and `dbus-register-property' functions
1486 optionally do not register names.
1488 *** The new function `dbus-register-service' registers a known service
1489 name on a D-Bus without also registering a property or a method.
1493 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
1494 if called with a prefix argument, read a file name from the minibuffer
1495 instead of using the current buffer.
1497 *** The "dired local variables" feature of Dired-x is obsolete.
1498 The standard directory local variables feature replaces it.
1502 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
1503 controlling attempts to autojoin a channel.
1505 *** New variable `erc-coding-system-precedence': If we use `undecided'
1506 as the server coding system, this variable will then be consulted.
1507 The default is to decode strings that can be decoded as utf-8 as
1508 utf-8, and do the normal `undecided' decoding for the rest.
1512 *** The default value of `eshell-directory-name' has changed
1513 to be an "eshell" directory in `user-emacs-directory'.
1514 The old "~/.eshell/" directory is still used if it exists, though.
1518 *** The M-x gdb command now uses the GDB Machine Interface protocol.
1519 It now supports multithread non-stop debugging and simultaneous
1520 debugging of several threads.
1524 *** RET (`image-toggle-animation') toggles animation, if applicable.
1525 Animation plays once, unless the option `image-animate-loop' is non-nil.
1529 *** New command M-x info-display-manual displays a named Info manual.
1530 If that manual is already visited in some Info buffer, it displays
1531 that buffer. (This is handy if you have many manuals in many *info*
1532 buffers, and don't remember the name of the buffer visiting the manual
1533 you want to consult.) Otherwise, it loads and displays the manual.
1535 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
1536 This is for compatibility with the stand-alone Info reader program,
1537 and also because `Info-edit' is a rarely used command that is disabled
1540 ** Mail mode changes (not Message mode)
1542 *** New command M-x mail-add-attachment for adding MIME attachments
1544 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
1545 (Its name is misleading, since it has nothing to do with MIME
1546 attachments.) The old name is now an obsolete alias to the new name.
1548 ** MH-E has been updated to MH-E version 8.3.1.
1549 See MH-E-NEWS for details.
1551 ** Modula-2 mode provides auto-indentation.
1553 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
1555 ** nXML mode no longer binds C-RET to `nxml-complete'.
1556 Completion is now performed via `completion-at-point', bound to C-M-i
1557 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
1558 default), this performs tag completion.
1560 ** Org mode has been updated to version 7.8.09.
1561 See ORG-NEWS for details.
1563 ** Prolog mode has been completely revamped, with lots of additional
1564 functionality such as more intelligent indentation, electricity,
1565 support for more variants, including Mercury, and a lot more.
1569 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
1570 in the Rmail incoming message.
1572 *** The variable `rmail-message-filter' no longer has any effect.
1573 This change was made in Emacs 23.1 but was not advertised at the time.
1574 Try using `rmail-show-message-hook' instead.
1578 *** M-x shell prompts for the shell path name if the default directory
1579 is a remote file name and neither the environment variable $ESHELL nor
1580 the variable `explicit-shell-file-name' is set.
1582 *** TAB is now bound to the standard `completion-at-point' command,
1583 which now implements the pcomplete rules for shell command completion.
1587 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
1588 if the mail server supports them. This uses either built-in GnuTLS
1589 support, or the starttls.el library. Customize `smtpmail-stream-type'
1592 *** The variable `smtpmail-auth-credentials' has been removed.
1593 By default, the information is now stored in the file ~/.authinfo.
1594 This was the default value of smtpmail-auth-credentials. If you had
1595 customized smtpmail-auth-credentials to a list of user names and
1596 passwords, those settings are not used. During your first connection
1597 to the smtp server, Emacs will prompt for the user name and password,
1598 and offer to save them to ~/.authinfo. Or you can manually copy the
1599 credentials to ~/.authinfo. For example, if you had
1601 (setq smtpmail-auth-credentials
1602 '(("mail.example.org" 25 "jim" "s!cret")))
1604 then the equivalent line in ~/.authinfo would be
1606 machine mail.example.org port 25 login jim password s!cret
1608 See the auth-source manual for more information, e.g. on encrypting
1609 the credentials file.
1611 *** The variable `smtpmail-starttls-credentials' has been removed.
1612 If you had that set, you need to put
1614 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
1616 in your ~/.authinfo file instead.
1618 *** SMTPmail defaults to using the address in the From: header as the
1619 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
1620 to the address you wish to use instead.
1624 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
1625 and `sql-oracle-scan-on'.
1627 *** New options controlling prompting for login parameters.
1628 Each supported product has a custom variable `sql-*-login-params',
1629 which is a list of the parameters to be prompted for before a
1630 connection is established.
1632 *** The command `sql-product-interactive' now takes a prefix argument,
1633 which causes it to prompt for an SQL product.
1635 *** Product-specific SQL interactive commands now take prefix arguments.
1636 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
1637 given a prefix argument, prompt for a name for the SQL interactive
1638 buffer. This reduces the need for calling `sql-rename-buffer'.
1640 *** SQL interactive modes suppress command continuation prompts, and
1641 replace tabs with spaces. The first change impacts multiple line SQL
1642 statements entered with C-j between each line, statements yanked into
1643 the buffer and statements sent with `sql-send-*' functions. The
1644 second prevents the MySQL and Postgres interpreters from listing
1645 object name completions when sent text via `sql-send-*' functions.
1647 *** New command `sql-connect' starts a predefined SQLi session,
1648 using the login parameters from `sql-connection-alist'.
1650 *** New "Save Connection" menu item in SQLi buffers.
1651 This gathers the login params specified for the SQLi session, if it
1652 was not started by a connection, and saves them as a new connection.
1654 *** New commands for listing database objects and details:
1655 sql-list-all and sql-list-table.
1657 *** An API for manipulating SQL product definitions has been added.
1661 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
1665 *** New inline access method "ksu" (kerberized su).
1667 *** The following access methods are discontinued: "ssh1_old",
1668 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
1670 *** The user option `remote-file-name-inhibit-cache' controls whether
1671 remote file attributes are cached for better performance.
1673 *** The option `ange-ftp-binary-file-name-regexp' has changed its
1674 default value to "".
1676 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
1677 for remote machines which support SELinux.
1679 ** New function `url-queue-retrieve', which behaves like url-retrieve,
1680 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
1681 the degree of parallelism.
1683 ** VC and related modes
1685 *** Support for pulling on distributed version control systems.
1686 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
1687 supported (currently with Bzr, Git, and Mercurial), to update the
1688 current branch and working tree. A prefix argument means to prompt
1689 the user for specifics, e.g. a pull location.
1691 *** `vc-update' is now an alias for `vc-pull'.
1693 *** Support for merging on distributed version control systems.
1694 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
1695 is supported (currently with Bzr, Git, and Mercurial), to merge
1696 changes from another branch into the current one. It prompts for
1697 specifics, e.g. a merge source.
1699 *** New option `vc-revert-show-diff' controls whether `vc-revert'
1700 shows a diff while querying the user. It defaults to t.
1702 *** Log entries in some Log View buffers can be toggled to display a
1703 longer description by typing RET (log-view-toggle-entry-display).
1704 This is currently supported for Bzr, Git, and Mercurial (to support
1705 another backend, define a `log-view-expanded-log-entry-function').
1706 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
1707 use this to display the full log entry for the revision at point.
1709 *** New command `vc-ediff' allows visual comparison of two revisions
1710 of a file similar to `vc-diff', but using ediff backend.
1712 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
1713 this was not advertised at the time.
1715 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
1716 Since Emacs 23, it has done the same thing as `toggle-read-only', but
1717 this was not advertised at the time.
1723 *** erc-hecomplete.el (use erc-pcomplete.el instead)
1725 *** partial-completion-mode (complete.el) is obsolete.
1726 You can get a comparable behavior with:
1727 (setq completion-styles '(partial-completion initials))
1728 (setq completion-pcm-complete-word-inserts-delimiters t)
1730 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
1732 *** pgg is obsolete (use EasyPG instead).
1734 *** sregex.el is obsolete, since rx.el is a strict superset.
1736 *** s-region.el and pc-select.el are obsolete.
1737 They are superseded by shift-select-mode, enabled by default since 23.1.
1739 *** vc-mcvs.el is obsolete (for lack of a maintainer).
1743 *** The Landmark game is now invoked with `landmark', not `lm'.
1744 Its functions and variables have been similarly renamed.
1746 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
1747 (This interfered with cua-mode.)
1749 *** f90.el has some support for Fortran 2008 syntax.
1751 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
1753 *** New command `nato-region' converts text to NATO phonetic alphabet.
1756 * New Modes and Packages in Emacs 24.1
1758 ** Occur Edit mode applies edits made in *Occur* buffers to the
1759 original buffers. It is bound to "e" in Occur mode.
1761 ** New global minor mode electric-pair-mode.
1762 When enabled, typing an open parenthesis automatically inserts the
1763 matching closing one.
1765 ** New global minor mode electric-indent-mode.
1766 When enabled, typing certain characters triggers reindentation.
1767 Major modes wishing to use this can set electric-indent-chars or
1768 electric-indent-functions.
1770 ** New global minor mode electric-layout-mode.
1771 When enabled, typing certain characters automatically inserts newlines.
1772 Major modes wishing to use this can set electric-layout-rules.
1774 ** tabulated-list.el provides a generic major mode for tabulated data,
1775 from which other modes can be derived.
1777 ** pcase.el provides the ML-style pattern matching macro `pcase'.
1779 ** secrets.el is an implementation of the Secret Service API, an
1780 interface to password managers like GNOME Keyring or KDE Wallet. The
1781 Secret Service API requires D-Bus for communication. The command
1782 `secrets-show-secrets' offers a buffer with a visualization of the
1785 ** notifications.el provides an implementation of the Desktop
1786 Notifications API. It requires D-Bus for communication.
1788 ** soap-client.el supports access to SOAP web services from Emacs.
1789 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
1791 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
1793 ** New emacs-lock.el package.
1794 The previous version has been moved to obsolete/old-emacs-lock.el.
1795 Now, there is a proper minor mode `emacs-lock-mode'. Protection
1796 against exiting Emacs and killing the buffer can be set separately.
1797 The mechanism for automatically turning off protection for buffers
1798 with dead inferior processes has been generalized.
1801 * Incompatible Lisp Changes in Emacs 24.1
1803 ** Passing a nil argument to a minor mode function call now ENABLES
1804 the minor mode unconditionally. This is so that you can write e.g.
1806 (add-hook 'text-mode-hook 'foo-mode)
1808 to enable foo-mode in Text mode buffers, removing the need for
1809 `turn-on-foo-mode' style functions. This affects all mode commands
1810 defined by `define-minor-mode'. If called interactively, the mode
1811 command still toggles the minor mode.
1813 ** The return value of `backup-buffer' has changed.
1814 It is now a list of three elements, where the second element is a list
1815 describing the original file's SELinux context. If Emacs or the
1816 system lacks SELinux support, the context list is (nil nil nil nil).
1817 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
1819 ** `char-direction-table' and the `char-direction' function were deleted.
1820 They were buggy and inferior to the new support of bidirectional
1821 editing introduced in Emacs 24. If you need the bidirectional
1822 properties of a character, use `get-char-code-property' with the last
1823 argument `bidi-class'.
1825 ** `copy-directory' now copies the source directory as a subdirectory
1826 of the target directory, if the latter is an existing directory. The
1827 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
1828 the contents directly into a pre-existing target directory.
1830 ** For mouse click input events in the text area, the Y pixel
1831 coordinate in the POSITION list now counts from the top of the text
1832 area, excluding any header line. Previously, it counted from the top
1835 ** Support for "old-style" backquotes, obsolete for 10+ years, has
1836 been further reduced. Now a backquote not followed by a space is
1837 always treated as a "new-style" backquote. Please remove all
1838 "old-style" backquotes from your code. If your code uses backquotes
1839 as documented in the Elisp manual, and compiles without warning, then
1840 you have nothing to do in this regard. Code not following the
1841 appropriate conventions may fail to compile.
1843 The most common cause of trouble seems to be an old-style backquote
1844 followed by a newline. Another cause of trouble is vector notation
1845 for key sequence notation: instead of [(control ,)] and [(control ')],
1846 you should write [(control ?,)] and [(control ?')], which will work in
1849 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
1850 was not advertised at the time. The function `custom-initialize-delay'
1851 replaced all known uses.
1853 ** `view-buffer' now treats special mode-class in the same way that
1854 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
1855 major mode is special).
1857 ** Menu and tool bar changes
1859 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
1860 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
1861 With these alist entries omitted, `make-frame' checks the value of the
1862 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
1863 a menu-bar or tool-bar, respectively. If the alist entries are added,
1864 they override the value of `menu-bar-mode'/`tool-bar-mode'.
1866 *** The menu bar bindings's caches are not used any more.
1867 Use (where-is-internal <def> nil t) instead.
1869 ** Regions created by mouse dragging are now normal active regions,
1870 similar to those created by shift-selection (see Selection changes
1871 above). In previous Emacs versions, these regions were delineated by
1872 `mouse-drag-overlay'; that variable has been removed.
1874 ** The fourth argument of `filter-buffer-substring' has been removed.
1875 If you want to remove text properties from the final result, simply
1876 pass the result through substring-no-properties.
1878 ** cl.el no longer provides `cl-19'.
1880 ** The following obsolete functions and aliases have been removed
1881 (the appropriate new function is given in parentheses; "not needed"
1882 means you can just remove all calls to the function in question):
1884 *** `comint-kill-output' (`comint-delete-output')
1885 *** `decompose-composite-char' (`char-to-string')
1886 *** `outline-visible' (`outline-invisible-p')
1887 *** `internal-find-face' (`facep')
1888 *** `internal-get-face' (`facep and check-face')
1889 *** `frame-update-faces' (not needed)
1890 *** `frame-update-face-colors' (`frame-set-background-mode')
1891 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
1892 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
1893 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
1894 *** `x-make-font-bold-italic' (`make-face-bold-italic')
1895 *** `x-make-font-unbold' (`make-face-unbold')
1896 *** `x-make-font-unitalic' (`make-face-unitalic')
1897 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
1898 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
1899 *** `iswitchb-default-keybindings' (`iswitchb-mode')
1900 *** `char-bytes' (== 1)
1901 *** `isearch-return-char' (`isearch-printing-char')
1902 *** `make-local-hook' (not needed)
1903 *** `set-screen-height' (`set-frame-height')
1904 *** `set-screen-width' (`set-frame-width')
1906 ** The following obsolete variables and varaliases have been removed
1907 (the appropriate new variable is given in parentheses):
1909 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
1910 *** `vc-header-alist' (`vc-BACKEND-header')
1911 *** `directory-sep-char' (== ?/)
1912 *** `font-lock-defaults-alist' (`font-lock-defaults')
1913 *** `e' (`float-e').
1915 ** The following obsolete files were removed:
1916 sc.el, x-menu.el, rnews.el, rnewspost.el
1918 ** The format of the finder-inf.el file has changed, since the Finder
1919 mechanism is now based on the package system. The variable
1920 `finder-package-info' is replaced by `package--builtins' and
1921 `finder-keywords-hash'.
1923 ** When generating autoloads, `update-directory-autoloads' no longer
1924 assumes every inspected file is in your `load-path'. It instead
1925 generates relative names according to the current `load-path'.
1928 * Lisp changes in Emacs 24.1
1930 ** Code can now use lexical scoping by default instead of dynamic scoping.
1931 The `lexical-binding' variable enables lexical scoping for local
1932 variables. It is typically set via a file-local variable in the first
1933 line of the file, in which case it applies to all the code in that
1936 *** `eval' takes a new optional argument `lexical' to choose the new lexical
1937 binding instead of the old dynamic binding mode.
1939 *** Lexically scoped interpreted functions are represented with a new form
1940 of function value which looks like (closure ENV ARGS &rest BODY).
1942 *** New macro `letrec' to define recursive local functions.
1944 *** `defvar' and `defconst' now mark the variable as special (dynamic).
1945 So do `defcustom' and other forms that call `defvar' as a subroutine.
1947 *** New function `special-variable-p' to check whether a variable is
1948 declared as dynamically bound.
1950 *** The form ((lambda ...) ...) is deprecated.
1952 ** An Emacs Lisp testing tool is now included.
1953 Emacs Lisp developers can use this tool to write automated tests for
1954 their code. See the ERT info manual for details.
1956 ** Changes for bidirectional display and editing
1958 *** New function `current-bidi-paragraph-direction'.
1959 This returns the base direction of the paragraph at point.
1961 *** New function `bidi-string-mark-left-to-right'.
1962 Given a string containing characters from right-to-left scripts, this
1963 function returns another string which can be safely inserted into a
1964 buffer, such that any following text will be always displayed to the
1965 right of that string. (This works by appending an invisible Unicode
1966 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
1968 This is useful when the buffer has overall left-to-right paragraph
1969 direction and you need to insert a string whose contents are not known
1970 in advance, without disrupting the layout of the line.
1974 *** Window tree functions are accessible in Elisp.
1975 Functions are provided to return the parent, siblings or child windows
1976 of any window including internal windows (windows not associated with a
1977 buffer) in the window tree.
1979 **** New function `window-valid-p' gives non-nil for live and internal
1982 **** Window manipulation can deal with internal windows.
1983 Many window handling functions like `split-window', `delete-window', or
1984 `delete-other-windows' as well as the window resizing functions can now
1985 act on any window including internal ones.
1987 *** window-total-height/-width vs window-body-height/-width.
1988 The function `window-height' has been renamed to `window-total-height'
1989 and `window-width' has been renamed to `window-body-width'. The old
1990 names are provided as aliases. Two new functions `window-total-width'
1991 and `window-body-height' are provided.
1993 *** Window parameters specific to window handling functions.
1994 For each window you can specify a parameter to override the default
1995 behavior of a number of functions like `split-window', `delete-window'
1996 and `delete-other-windows'. The variable `ignore-window-parameters'
1997 allows to ignore processing such parameters.
1999 *** New semantics of third argument of `split-window'.
2000 The third argument of `split-window' has been renamed to SIDE and can be
2001 set to any of the values 'below, 'right, 'above, or 'left to make the
2002 new window appear on the corresponding side of the window that shall be
2003 split. Any other value of SIDE will cause `split-window' to split the
2004 window into two side-by-side windows as before.
2006 *** Window resizing functions.
2007 A new standard function for resizing windows called `window-resize' has
2008 been introduced. This and all other functions for resizing windows no
2009 longer delete any windows when they become too small.
2011 *** Deleting the selected window now selects the most recently selected
2012 live window on that frame instead.
2014 *** `adjust-window-trailing-edge' adjustments.
2015 `adjust-window-trailing-edge' can now deal with fixed-size windows and
2016 is able to resize other windows if a window adjacent to the trailing
2017 edge cannot be shrunk any more. This makes its behavior more similar to
2018 that of Emacs 21 without compromising, however, its inability to delete
2019 windows which was introduced in Emacs 22.
2021 *** Window-local buffer lists.
2022 Windows now have local buffer lists. This means that removing a buffer
2023 from display in a window will preferably show the buffer previously
2024 shown in that window with its previous window-start and window-point
2025 positions. This also means that the same buffer may be automatically
2026 shown twice even if it already appears in another window.
2028 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2029 which if non-nil requires the buffer to be displayed in the currently
2030 selected window, signaling an error otherwise. If nil, another window
2031 can be used, e.g. if the selected one is strongly dedicated.
2033 *** `split-window-vertically' and `split-window-horizontally' renamed
2034 to `split-window-below' and `split-window-right' respectively.
2035 The old names are kept as aliases.
2039 **** The second arg to `display-buffer' and `pop-to-buffer' is now
2040 named ACTION, and takes a display action of the same form as
2041 `display-buffer-base-action' (see Changes, above). A non-nil,
2042 non-list value is treated specially, as the old meaning.
2044 **** New variable `display-buffer-overriding-action'.
2046 **** The procedure of `display-buffer' etc. to choose a window is
2047 determined by combining `display-buffer-overriding-action',
2048 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2049 and `display-buffer-fallback-action'. The second and fourth of these
2050 are user-customizable variables.
2052 See the docstring of `display-buffer' for details.
2054 *** New functions `window-state-get' and `window-state-put'.
2055 These functions allow to save and restore the state of an arbitrary
2056 frame or window as an Elisp object.
2060 *** New variable `completion-extra-properties' used to specify extra
2061 properties of the current completion:
2062 - :annotate-function, same as the old completion-annotate-function.
2063 - :exit-function, function to call after completion took place.
2065 *** Functions on `completion-at-point-functions' can return any of the
2066 properties valid for `completion-extra-properties'.
2068 *** `completion-annotate-function' is obsolete.
2070 *** New `metadata' method for completion tables. The metadata thus returned
2071 can specify various details of the data returned by `all-completions':
2072 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
2073 used to select a style in completion-category-overrides.
2074 - `annotation-function' to add annotations in *Completions*.
2075 - `display-sort-function' to specify how to sort entries in *Completions*.
2076 - `cycle-sort-function' to specify how to sort entries when cycling.
2078 *** `minibuffer-local-filename-must-match-map' is not used any more.
2079 Instead, the bindings in `minibuffer-local-filename-completion-map'
2080 are combined with `minibuffer-local-must-match-map'.
2082 *** New variable `completing-read-function' allows overriding the
2083 behavior of `completing-read'.
2085 ** `glyphless-char-display' can now distinguish between graphical and
2086 text terminal display, via a char-table entry that is a cons cell.
2088 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
2089 Instead, the offending function is removed.
2093 *** New function `run-hook-wrapped' for running an abnormal hook by
2094 passing the hook functions as arguments to a "wrapping" function.
2095 Like `run-hook-with-args-until-success', it stops at the first
2096 non-nil return value.
2098 *** New macro `with-wrapper-hook' for running an abnormal hook as a
2099 set of "wrapping" filters, similar to around advice.
2100 (A version of this macro was actually added in Emacs 23.2 but was not
2101 advertised at the time.)
2105 *** New macro `condition-case-unless-debug' (this was actually added in
2106 Emacs 23.1 as condition-case-no-debug, but not advertised)
2108 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
2110 *** Variable `stack-trace-on-error' removed.
2112 *** The debugger can now "continue" from an error, which means it will
2113 jump to the error handler as if the debugger had not been invoked
2114 instead of jumping all the way to the top-level.
2116 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
2117 This can be useful when `inhibit-quit' is set.
2119 ** The new function `server-eval-at' allows evaluation of Lisp forms on
2120 named Emacs server instances.
2122 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
2123 to redirect STDOUT to a file.
2125 ** The function `format-time-string' now supports the %N directive,
2126 for higher-resolution time stamps.
2128 ** New input reading functions
2130 *** New function `read-char-choice' reads a restricted set of
2131 characters, discarding any inputs not inside the set.
2133 *** The command `read-color' now requires a match for a color name
2134 or RGB triplet, instead of signaling an error if the user provides
2137 **** `facemenu-read-color' is now an alias for `read-color'.
2139 ** `image-library-alist' is renamed to `dynamic-library-alist'.
2140 The variable is now used to load all kind of supported dynamic libraries,
2141 not just image libraries. The previous name is still available as an
2144 ** Syntax parsing changes
2146 *** New variable `syntax-propertize-function'.
2147 This replaces `font-lock-syntactic-keywords' which is now obsolete.
2148 This allows syntax-table properties to be set independently from font-lock:
2149 just call syntax-propertize to make sure the text is propertized.
2150 Together with this new variable come a new hook
2151 syntax-propertize-extend-region-functions, as well as two helper functions:
2152 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
2153 as-is; and syntax-propertize-rules which provides a new way to specify
2156 *** Syntax tables support a new "comment style c" additionally to style b.
2158 ** New hook `post-self-insert-hook', run after `self-insert-command'.
2160 ** frame-local variables cannot be let-bound any more.
2162 ** Major and minor mode changes
2164 *** `set-auto-mode' now respects mode: local variables at the end of files,
2165 as well as those in the -*- line.
2167 *** `prog-mode' is a new major mode from which programming modes
2170 **** `prog-mode-hook' can be used to enable features for programming
2171 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
2172 on-the-fly spell checking for comments and strings.
2174 *** New hook `change-major-mode-after-body-hook', run by
2175 `run-mode-hooks' just before any other mode hooks.
2177 *** Enabled globalized minor modes can be disabled in specific major modes.
2178 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
2179 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
2181 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
2183 ** File-handling changes
2185 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
2186 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
2187 both non-nil. Interactively, TRASH defaults to t, unless a prefix
2188 argument is supplied (see Trash changes, above).
2190 *** New file predicates: `file-equal-p', `file-in-directory-p'.
2192 ** Tool-bars can display separators.
2193 Tool-bar separators are handled like menu separators in menu-bar maps,
2194 i.e. via menu entries of the form `(menu-item "--")'.
2198 *** Animated images support (currently animated gifs only).
2200 **** `image-animated-p' returns non-nil if an image can be animated.
2202 **** `image-animate' animates a supplied image spec.
2204 **** `image-animate-timer' returns the timer object for an image that
2207 *** `image-extension-data' has been renamed to `image-metadata'.
2208 The old name is an obsolete alias to the new one.
2210 *** Image mode can view any image type that ImageMagick supports.
2211 This requires Emacs to be built with ImageMagick support.
2213 **** New function `imagemagick-types', defined if ImageMagick support
2214 is enabled, returns a list of image file extensions that your
2215 ImageMagick installation supports.
2217 **** New function `imagemagick-register-types' enables ImageMagick
2218 image types in Image mode and in `create-image' and other helper
2221 **** New option `imagemagick-types-inhibit' excludes certain
2222 ImageMagick image types from `imagemagick-register-types'.
2224 **** With ImageMagick support, there are extra Image mode commands to
2225 resize and rotate images: `image-transform-fit-to-height',
2226 `image-transform-fit-to-width', `image-transform-set-rotation', and
2227 `image-transform-set-scale'.
2229 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
2230 passes it to the mail user agent function. This argument specifies an
2231 action for returning to the caller after finishing with the mail. For
2232 example, this is used by Rmail to optionally delete a mail window.
2234 ** XML and HTML parsing
2235 If Emacs is compiled with libxml2 support, there are two new
2236 functions: `libxml-parse-html-region' (which parses "real world" HTML)
2237 and `libxml-parse-xml-region' (which parses XML). Both return an
2238 Emacs Lisp parse tree.
2240 ** Networking and encryption changes
2242 *** `open-network-stream' can now be used to open an encrypted stream.
2243 It now accepts an optional `:type' parameter for initiating a TLS
2244 connection, directly or via STARTTLS. To do STARTTLS, additional
2245 parameters (`:end-of-command', `:success', `:capabilities-command')
2246 must also be supplied.
2248 *** New library gnutls.el.
2249 The new function `gnutls-available-p' returns non-nil if Emacs is
2250 built with GnuTLS support. The main entry points are
2251 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
2252 these functions through `open-network-stream', because that can
2253 upgrade connections through STARTTLS opportunistically or use plain
2254 SSL, depending on your needs. For debugging, set `gnutls-log-level'
2257 *** New primitive `secure-hash' that supports many secure hash algorithms:
2258 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
2259 sha1.el has been removed. The `sha1' feature is provided by default.
2263 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
2265 ** Progress reporters can now "spin".
2266 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
2267 now be nil, or omitted. This makes a "non-numeric" reporter. Each
2268 time you call `progress-reporter-update' on that progress reporter,
2269 with a nil or omitted VALUE argument, the reporter message is
2270 displayed with a "spinning bar".
2272 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
2273 being reverted, even if the buffer has a local `revert-buffer-function'.
2275 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
2276 If delayed-warnings-list is non-nil, the command loop calls
2277 `delayed-warnings-hook' after `post-command-hook'. At present, this
2278 is only used by Emacs on some platforms to display warnings during
2279 startup, which might otherwise not be noticed. This uses the
2280 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
2282 ** rx.el has a new `group-n' construct for explicitly numbered groups.
2284 ** New function `make-composed-keymap' that constructs a new keymap
2285 from multiple input maps. You can use this to make a keymap that
2286 inherits from multiple maps, eg:
2287 (set-keymap-parent newmap (make-composed-keymap othermap parent))
2289 ** New function `string-prefix-p'.
2290 (This was actually added in Emacs 23.2 but was not advertised at the time.)
2292 ** New reader macro ## that stands for the empty symbol.
2293 This means that the empty symbol can now be read back. Also, #: by itself
2294 (when not immediately followed by a possible symbol character) stands for
2295 an empty uninterned symbol.
2297 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
2299 ** The following functions and variables are obsolete:
2301 *** `tooltip-use-echo-area' is obsolete.
2302 Rather than setting this to t, disable Tooltip mode instead.
2304 *** buffer-substring-filters is obsolete.
2305 Use `filter-buffer-substring-functions' instead.
2307 *** `byte-compile-disable-print-circle' is obsolete.
2309 *** `deferred-action-list' and `deferred-action-function' are obsolete.
2310 Use `post-command-hook' instead.
2312 *** `font-lock-maximum-size' is obsolete.
2315 * Changes in Emacs 24.1 on non-free operating systems
2317 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
2318 and also when HOME is set to C:\ by default.
2320 ** New configure.bat options
2322 *** --enable-checking builds Emacs with extra runtime checks.
2324 *** --distfiles specifies files to be included in binary distribution.
2326 *** --without-gnutls disables automatic GnuTLS detection.
2328 *** --lib for general library linkage, works with the USER_LIBS build variable.
2330 ** New make target `dist' to create binary distribution for MS Windows.
2332 ** The Lisp function `w32-default-color-map' is now obsolete.
2333 (It is only used internally in the Emacs C code.)
2335 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
2336 reappear on mouse-over. (Requires OS X 10.6 or later.)
2338 ** On Mac OS X, dragging a file into Emacs visits the file, like on
2339 other platforms, rather than inserting its contents into the buffer.
2342 ----------------------------------------------------------------------
2343 This file is part of GNU Emacs.
2345 GNU Emacs is free software: you can redistribute it and/or modify
2346 it under the terms of the GNU General Public License as published by
2347 the Free Software Foundation, either version 3 of the License, or
2348 (at your option) any later version.
2350 GNU Emacs is distributed in the hope that it will be useful,
2351 but WITHOUT ANY WARRANTY; without even the implied warranty of
2352 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2353 GNU General Public License for more details.
2355 You should have received a copy of the GNU General Public License
2356 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2361 paragraph-separate: "[
\f]*$"