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
26 ** New configure option '--without-all' to disable additional features.
27 This disables most of the features that are normally enabled by default.
29 ** New configure option '--enable-link-time-optimization' to utilize
30 an appropriate feature provided by GCC since version 4.5.0.
32 ** New configure option '--enable-gcc-warnings', intended for developers.
33 If building with GCC, this enables compile-time checks that warn about
34 possibly-questionable C code. On a recent GNU system there should be
35 no warnings; on older and on non-GNU systems the generated warnings
38 ** The configure option '--disable-maintainer-mode' has been removed,
39 as it was confusingly-named and rarely useful.
42 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
43 overwriting "emacs" in the installation bin/ directory with a link
47 ** Emacs uses libtinfo in preference to libncurses, if available.
50 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
51 /usr/pkg/lib to the linker search path. You must add them yourself if
55 ** On Mac OS X, configure no longer automatically adds the Fink /sw
56 directories to the search path. You must add them yourself if you want them.
59 ** The standalone scripts rcs-checkin and vcdiff have been removed
60 (from the bin and libexec directories, respectively). The former is
61 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
63 ** The configuration option '--enable-use-lisp-union-type' has been
64 renamed to '--enable-check-lisp-object-type', as the resulting
65 Lisp_Object type no longer uses a union to implement the compile time
66 check that this option enables.
69 * Startup Changes in Emacs 24.3
71 ** Emacs no longer searches for `leim-list.el' files beneath the standard
72 lisp/ directory. There should not be any there anyway. If you have
73 been adding them there, put them somewhere else, eg site-lisp.
76 ** The `--no-site-lisp' command line option now works for Nextstep builds.
79 * Changes in Emacs 24.3
83 *** `C-h f' (describe-function) can now perform autoloading.
84 When this command is called for an autoloaded function whose docstring
85 contains a key substitution construct, that function's library is
86 automatically loaded, so that the documentation can be shown
87 correctly. To disable this, set `help-enable-auto-load' to nil.
89 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
90 even after their associated libraries have been loaded (and the
91 autoloads have been redefined as functions).
93 ** The function `current-time' now returns extended-format time stamps
94 (HIGH LOW USEC PSEC) that use picosecond resolution; the PSEC
95 component is new. PSEC is typically a multiple of 1000 on current
96 machines. Other functions that use this format, such as
97 file-attributes and format-time-string, have been changed accordingly.
98 Old-format time stamps are still accepted.
100 ** New functions `system-users', `system-groups' return lists of the user
101 name, group names known to the system (where possible).
103 ** If your Emacs was built from a bzr checkout, the new variable
104 `emacs-bzr-version' contains information about which bzr revision was used.
106 ** ImageMagick support, if available, is automatically enabled.
107 It is no longer necessary to call `imagemagick-register-types'
108 explicitly to install ImageMagick image types; that function is called
109 automatically at startup, or when customizing a relevant imagemagick-
112 *** Setting `imagemagick-types-inhibit' to t now disables the use of
113 ImageMagick to view images. You must call imagemagick-register-types
114 afterwards if you do not use customize to change this.
116 *** The new variable `imagemagick-enabled-types' also affects which
117 ImageMagick types are treated as images. The function
118 `imagemagick-filter-types' returns the list of types that will be
121 *** Images displayed via ImageMagick now support transparency and the
122 :background image spec property.
124 ** Internationalization changes
126 *** New language environment: Persian.
128 ** Face underlining can now use a wave.
129 See the "Face Attributes" section of the Elisp manual.
131 ** New fringe bitmap exclamation-mark.
133 ** String values for `initial-buffer-choice' also apply to emacsclient
134 frames, if emacsclient is only told to open a new frame without
135 specifying any file to visit or expression to evaluate.
138 ** You can prevent the creation of lock files by setting `create-lockfiles'
139 to nil. Use with caution, and only if you really need to.
142 ** Using "unibyte: t" in Lisp source files is obsolete.
143 Use "coding: raw-text" instead.
147 *** New option `mode-line-default-help-echo' specifies the help text
148 (shown in a tooltip or in the echo area) for any part of the mode line
149 that does not have its own specialized help text.
151 *** You can now click mouse-3 in the coding system indicator to
152 invokes `set-buffer-file-coding-system'.
155 ** Setting `enable-remote-dir-locals' to non-nil allows directory
156 local variables on remote hosts.
159 ** `insert-char' is now a command, and `ucs-insert' an obsolete alias
162 ** The entry for PCL-CVS has been removed from the Tools menu.
163 The PCL-CVS commands are still available via the keyboard.
166 * Editing Changes in Emacs 24.3
168 ** New option `yank-handled-properties' allows processing of text
169 properties on yanked text, in more ways that are more general than
170 just removing them, as done by `yank-excluded-properties'.
172 ** New option `delete-trailing-lines' specifies whether the M-x
173 delete-trailing-whitespace command should delete trailing lines at the
174 end of the buffer. It defaults to t.
178 *** Global `M-s _' starts a symbol (identifier) incremental search,
179 and `M-s _' in Isearch toggles symbol search mode.
180 `M-s c' in Isearch toggles search case-sensitivity.
182 *** `search-whitespace-regexp' now acts on ordinary incremental search
183 as well, so that each sequence of spaces in the search string matches
184 any combination of one or more whitespace characters. To change this
185 behavior, you can give `search-whitespace-regexp' a cons cell value,
186 where the car and cdr specify values for ordinary and regular
187 expression incremental search respectively.
189 ** M-x move-to-column, if called interactively with no prefix arg, now
190 prompts for a column number.
192 ** `mouse-avoidance-banish-position' can now be used to customize
193 `mouse-avoidance-mode' further.
195 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
197 ** `C-M-f' and `C-M-b' will now move to the path name separator
198 character when doing minibuffer filename prompts.
200 ** `goto-char' is now bound to `M-g c'.
202 ** New command `C-x r M-w' (copy-rectangle-as-kill).
203 It copies the region-rectangle as the last rectangle kill.
205 ** New input method `vietnamese-vni'.
208 * Changes in Specialized Modes and Packages in Emacs 24.3
210 ** Compilation has a new `compilation-always-kill' configuration variable.
214 The variables `term-default-fg-color' and `term-default-bg-color' are
215 now deprecated in favor of the `term-face' face, that you can
216 customize. Also, it is now possible to customize how are displayed the
217 ANSI terminal colors and styles by customizing the corresponding
218 `term-color-<COLOR>', `term-color-underline' and `term-color-bold'
222 *** CL's main entry is now (require 'cl-lib).
223 `cl-lib' is like the old `cl' except that it uses the namespace cleanly,
224 i.e. all its definitions have the "cl-" prefix (and internal definitions use
227 If `cl' provided a feature under the name `foo', then `cl-lib' provides it
228 under the name `cl-foo' instead, with the exceptions of the few definitions
229 that had to use `foo*' to avoid conflicts with pre-existing Elisp entities,
230 which have not been renamed to `cl-foo*' but just `cl-foo'.
232 The old `cl' is now deprecated and is just a bunch of aliases that
233 provide the old non-prefixed names.
235 *** `cl-flet' is not like `flet' (which is deprecated).
236 Instead it obeys the behavior of Common-Lisp's `flet'.
238 *** `cl-labels' is slightly different from `labels'.
239 The difference is that it relies on the `lexical-binding' machinery (as opposed
240 to the `lexical-let' machinery used previously) to capture definitions in
241 closures, so such closures will only work if `lexical-binding' is in use.
243 *** `progv' was rewritten to use the `let' machinery.
244 A side effect is that vars without corresponding value are bound to nil
245 rather than making them unbound.
249 *** `desktop-path' no longer includes the "." directory. Desktop
250 files are now located in ~/.emacs.d by default.
254 A new version of python.el, which provides several new features, including:
255 per-buffer shells, better indentation, Python 3 support, and improved
256 shell-interaction compatible with iPython (and virtually any other
259 *** Some user options have been replaced/renamed:
260 Old defcustom: | New defcustom:
261 python-indent | python-indent-offset
262 python-guess-indent | python-indent-guess-indent-offset
263 python-pdbtrack-do-tracking-p | python-pdbtrack-activate
264 python-use-skeletons | python-skeleton-autoinsert
266 *** Some user options have been removed:
268 **** `python-indent-string-contents': Strings are never indented.
270 **** `python-honour-comment-indentation':
271 Comments are never considered as indentation markers themselves.
273 **** `python-continuation-offset': Indentation is automatically
274 calculated in a pep8 compliant way depending on the context.
276 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
277 Have no direct mapping as the shell interaction is completely different.
279 **** `python-python-command', `python-jython-command':
280 Replaced by `python-shell-interpreter'.
282 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
283 `python-pdbtrack-minor-mode-string', `python-source-modes':
286 *** Some commands have been replaced:
287 Old command | New command
288 python-insert-class | python-skeleton-class
289 python-insert-def | python-skeleton-def
290 python-insert-for | python-skeleton-for
291 python-insert-if | python-skeleton-if
292 python-insert-try/except | python-skeleton-try
293 python-insert-try/finally | python-skeleton-try
294 python-insert-while | python-skeleton-while
295 python-find-function | python-nav-jump-to-defun
296 python-next-statement | python-nav-forward-sentence
297 python-previous-statement | python-nav-backward-sentence
298 python-send-buffer | python-shell-send-buffer
299 python-send-defun | python-shell-send-defun
300 python-send-region | python-shell-send-region
301 python-send-region-and-go | Emulate with python-shell-send-region and
302 python-shell-switch-to-shell
303 python-send-string | python-shell-send-string
304 python-switch-to-python | python-shell-switch-to-shell
305 python-describe-symbol | python-eldoc-at-point
309 *** The free software compiler GHDL is supported (and now the default).
311 *** Support for the VHDL-AMS packages has been added/updated.
313 *** Updated to the 2002 revision of the VHDL standard.
315 *** Accepts \r and \f as whitespace.
319 Faces for changes now use the same diff color scheme as in modern VCSes
320 where deletions are displayed in red (new faces `diff-refine-removed'
321 and `smerge-refined-removed' and new definition of `diff-removed'),
322 insertions in green (new faces `diff-refine-added' and
323 `smerge-refined-added' and new definition of `diff-added').
324 The variable `diff-use-changed-face' defines whether to use
325 the face `diff-changed', or `diff-removed' and `diff-added'
326 to highlight changes in context diffs.
328 ** Ediff now uses the same color scheme as Diff mode
329 on high color displays.
331 ** Flymake uses fringe bitmaps to indicate errors and warnings.
332 See flymake-fringe-indicator-position, flymake-error-bitmap and
333 flymake-warning-bitmap.
336 *** Pairing of parens/quotes uses electric-pair-mode instead of skeleton-pair.
337 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
338 *** `sh-use-smie' lets you choose a new indentation and navigation code.
340 ** reStructuredText mode
342 *** Rebind nearly all keys making room for more keys and complying
343 better to usage in other modes. Describe bindings with C-c C-h.
345 *** Major revision of indentation working very similar to other
346 modes. TAB is your friend.
348 *** Major revision of filling working fine with most of
349 reStructuredText syntax. Support auto-filling.
351 *** Major revision of comment handling.
353 *** Major revision of fontification working with `jit-lock-mode'.
355 *** Cover reStructuredText syntax more closely. Improve
356 the experience for Sphinx users.
358 *** `rst-insert-list' inserts new list or continues existing lists.
360 *** Extend correct and improve customization.
362 *** Negative prefix argument always works for `rst-adjust'.
364 *** Reset window configuration after displaying TOC.
366 *** Package version in `rst-version'.
368 ** New `derived-mode' filter for Ibuffer, bound to `/ M'.
369 `/ m' is now bound to filter by used-mode, which used to be bound to `/ M'.
373 *** The faces used by Apropos are now directly customizable.
374 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
375 see the `apropos' Custom group for details.
377 **** The old options whose values specified faces to use were removed
378 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
381 This package has been rewritten to use Tabulated List mode.
383 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
384 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
388 *** The calendars produced by cal-html include holidays.
389 Customize cal-html-holidays to change this.
393 *** `custom-reset-button-menu' now defaults to t.
395 *** Non-option variables are never matched in `customize-apropos' and
396 `customize-apropos-options' (i.e. the prefix argument does nothing for
399 ** erc will look up server/channel names via auth-source and use the
400 channel keys found, if any.
404 *** `dired-do-async-shell-command' executes each file sequentially
405 if the command ends in `;' (when operating on multiple files).
406 Otherwise, it executes the command on each file in parallel.
410 *** New option `async-shell-command-buffer' specifies what buffer to use
411 for a new asynchronous shell command when the default output buffer
412 `*Async Shell Command*' is already taken by another running command.
416 *** The option `ffap-url-unwrap-remote' can now be a list of strings,
417 specifying URL types which should be converted to remote file names at
418 the FFAP prompt. The default is now '("ftp").
422 *** The obsolete variable `follow-mode-off-hook' has been removed.
424 *** Follow mode no longer works by using advice.
425 The option `follow-intercept-processes' has been removed.
427 ** The `server-auth-key' variable can be used to set a permanent
428 shared key for Emacs Server.
430 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
431 closing brackets to be aligned with the line of the opening bracket.
433 ** FIXME something happened to ses.el, 2012-04-17.
435 ** which-function-mode now applies to all applicable major modes by default.
440 *** The syntax has been extended in order to allow ad-hoc proxy
441 definitions. See the manual for details.
444 *** Remote processes are now supported also on remote Windows host.
449 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
452 *** The D-Bus object manager interface is implemented.
455 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
456 if their value does not fit into Emacs's integer range.
459 *** The function `dbus-call-method' works non-blocking now, it can be
460 interrupted by C-g. `dbus-call-method-non-blocking' is obsolete.
463 *** Signals can be sent also as unicast message.
466 *** The argument list of `dbus-register-signal' has been extended,
467 according to the new match rule types of D-Bus. See the manual for
471 *** `dbus-init-bus' supports private connections.
474 *** There is a new function `dbus-setenv'.
477 ** notifications.el supports now version 1.2 of the Notifications API.
478 The function `notifications-get-capabilities' returns the supported
483 *** Newly-available packages are listed in the Package Menu as "new",
484 and sorted above the other "available" packages by default.
486 ** Tabulated List and packages derived from it
488 *** New command `tabulated-list-sort', bound to `S', sorts the column
489 at point, or the Nth column if a numeric prefix argument is given.
493 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
494 Previously, this slot stored semicolon-separated attribute-value pairs
495 appended to some imap URLs, but this is not compatible with RFC 3986.
496 So now the `filename' slot stores the entire path and query components
497 and the `attributes' slot is always nil.
499 *** New function `url-encode-url' for encoding a URI string.
500 The `url-retrieve' function now uses this to encode its URL argument,
501 in case that is not properly encoded.
503 ** Obsolete packages:
506 In most cases, assoc+member+push+delq work just as well.
507 And in any case it's just a terrible package: ugly semantics, terrible
508 inefficiency, and not namespace-clean.
523 * New Modes and Packages in Emacs 24.3
525 * Incompatible Lisp Changes in Emacs 24.3
527 ** The function `x-select-font' can return a font spec, instead of a
528 font name as a string. Whether it returns a font spec or a font name
529 depends on the graphical library.
531 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
532 that substring is inserted literally even if the LITERAL arg is
533 non-nil, instead of causing an error to be signaled.
536 ** Docstrings starting with `*' no longer indicate user options.
537 Only variables defined using `defcustom' are considered user options.
538 The function `user-variable-p' is now an obsolete alias for
542 ** The return values of `defalias', `defun' and `defmacro' have changed,
543 and are now undefined. For backwards compatibility, defun and
544 defmacro currently return the name of the newly defined function/macro
545 but this should not be relied upon.
547 ** `face-spec-set' no longer sets frame-specific attributes when the
548 third argument is a frame (that usage was obsolete since Emacs 22.2).
551 ** The arguments of `dbus-register-signal' are no longer just strings,
552 but keywords or keyword-string pairs. The old argument list will
553 still be supported for Emacs 24.x.
556 Some Lisp symbols have been renamed to avoid problems with spelling
557 that is incorrect or inconsistent with how Emacs normally spells a word.
559 *** Renamed functions
561 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
562 **** inactivate-input-method -> deactivate-input-method
563 **** quail-inactivate -> quail-deactivate
564 **** robin-inactivate -> robin-deactivate
565 **** viper-inactivate-input-method -> viper-deactivate-input-method
566 **** viper-inactivate-input-method-action ->
567 viper-deactivate-input-method-action
568 **** ucs-input-inactivate -> ucs-input-deactivate
571 The old hooks are still supported for backward compatibility, but they
572 are deprecated and will be removed eventually.
574 **** input-method-inactivate-hook -> input-method-deactivate-hook
575 **** robin-inactivate-hook -> robin-deactivate-hook
576 **** quail-inactivate-hook -> quail-deactivate-hook
578 *** Renamed Lisp variables
580 **** follow-deactive-menu -> follow-inactive-menu
581 **** inactivate-current-input-method-function ->
582 deactivate-current-input-method-function
584 ** The following obsolete variables and varaliases have been removed:
586 *** `facemenu-unlisted-faces'
587 *** `rmail-decode-mime-charset'
588 *** `last-input-char' and `last-command-char'
591 * Lisp changes in Emacs 24.3
593 ** New minor mode `read-only-mode' to replace toggle-read-only (now obsolete).
595 ** New functions `autoloadp' and `autoload-do-load'.
597 ** New function `posnp' to test if an object is a `posn'.
599 ** `function-get' fetches the property of a function, following aliases.
601 ** `toggle-read-only' accepts a second argument specifying whether to
602 print a message, if called from Lisp.
604 ** CL-style generalized variables are now in core Elisp.
605 `setf' is autoloaded and `push' and `pop' accept generalized variables.
607 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
608 The interpretation of the DECLS is determined by `defun-declarations-alist'.
610 ** `macro-declaration-function' is obsolete, use `macro-declarations-alist'.
612 ** New function `set-temporary-overlay-map'.
614 ** New macros `setq-local' and `defvar-local'.
616 ** New error type and new function `user-error'. Doesn't trigger the debugger.
620 *** The functions get-lru-window, get-mru-window and get-largest-window
621 now accept a third argument to avoid choosing the selected window.
623 *** New display action alist `inhibit-switch-frame', if non-nil, tells
624 display action functions to avoid changing which frame is selected.
626 *** New display action alist `pop-up-frame-parameters', if non-nil,
627 specifies frame parameters to give any newly-created frame.
629 *** The following variables are obsolete, as they can be replaced by
630 appropriate entries in the `display-buffer-alist' function introduced
633 **** `display-buffer-reuse-frames'
634 **** `special-display-regexps'
635 **** `special-display-frame-alist'
636 **** `special-display-buffer-names'
637 **** `special-display-function'
641 *** New function `completion-table-with-quoting' to handle completion
642 in the presence of quoting, such as file completion in shell buffers.
644 *** New function `completion-table-subvert' to use an existing completion
645 table, but with a different prefix.
649 *** `current-time-string' no longer requires that its argument's year
650 must be in the range 1000..9999. It now works with any year supported
651 by the underlying C implementation.
653 ** New function file-name-base.
655 ** New function `tty-top-frame' returns the topmost frame of a text terminal.
657 ** `automount-dir-prefix' is obsolete.
658 ** `buffer-has-markers-at' is obsolete.
660 * Changes in Emacs 24.3 on non-free operating systems
662 ** New configure.bat options on MS-Windows:
664 *** --without-libxml2 omits support for libxml2, even if its presence
667 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
668 Emacs now supports mouse highlight, help-echo (in the echo area), and
669 mouse-autoselect-window.
671 ** On MS-Windows Vista and later Emacs now supports symbolic links.
673 * Changes in Emacs 24.2
675 ** This is mainly a bug-fix release.
678 * Installation Changes in Emacs 24.1
680 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
681 to configure. Note that other libraries used by Emacs, RSVG and GConf,
682 also depend on Gtk+. You can disable them with --without-rsvg and
685 ** Emacs can be compiled with GnuTLS support.
686 This happens by default if a suitably recent version of the library is
687 found at build time. To prevent this, use the configure option
688 `--without-gnutls'. See below for GnuTLS features.
690 ** Emacs can be compiled with SELinux support.
691 This happens by default if a suitably recent version of the library is
692 found at build time. To prevent this, use the configure option
693 `--without-selinux'. See below for SELinux features.
695 ** Emacs can be compiled with ImageMagick support.
696 This happens by default if a suitably recent version of the library is
697 found at build time. To prevent this, use the configure option
698 `--without-imagemagick'. See below for ImageMagick features.
699 This feature is not available for the Nextstep or MS ports.
701 ** Emacs can be compiled with libxml2 support.
702 This happens by default if a suitably recent version of the library is
703 found at build time. To prevent this, use the configure option
704 `--without-xml2'. See below for libxml2 features.
706 ** By default, the installed Info and man pages are compressed.
707 You can disable this by configuring --without-compress-info.
709 ** New configure option --with-wide-int.
710 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
711 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
714 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
715 These provide no new functionality, they just remove the need to edit
716 lib-src/Makefile by hand in order to use the associated features.
718 ** New configure option --enable-use-lisp-union-type.
719 This is only useful for Emacs developers to debug certain types of bugs.
720 This is not a new feature; only the configure flag is new.
722 ** The standalone programs digest-doc and sorted-doc are removed.
723 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
725 ** The standalone program `fakemail' is removed.
726 If you need it, feedmail.el provides a superset of the functionality.
729 * Startup Changes in Emacs 24.1
731 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
732 command line arguments, and the EMACS_UNIBYTE environment variable, no
733 longer have any effect. (They were declared obsolete in Emacs 23.)
735 ** New command line option `--no-site-lisp' removes site-lisp directories
736 from load-path. -Q now implies this. This option does not affect the
737 EMACSLOADPATH environment variable (and hence has no effect for
741 * Changes in Emacs 24.1
745 *** Many packages now use the `completion-at-point' command,
746 rather than implementing separate completion commands.
748 *** `completion-at-point' now handles tags and semantic completion.
750 *** Completion in a non-minibuffer now tries to detect the end of completion
751 and pops down the *Completions* buffer accordingly.
753 *** New option `completion-cycle-threshold' allows completion cycling.
755 *** New option `completion-category-overrides' for overriding the
756 default completion style in certain circumstances.
758 *** New completion style `substring'.
760 *** Completion of buffer names uses `substring' completion by default.
762 *** The option `widget-complete-field' has been removed.
766 *** The first time you try sending mail, Emacs asks for a mail method.
767 This is implemented by a new default for `send-mail-function', which
768 is `sendmail-query-once'. This offers to use the smtpmail package, or
769 to use the old defaults relying on external mail facilities
770 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
771 `mailclient-send-it' on Windows).
773 *** Typing C-c m in the buffer made by M-x report-emacs-bug transfers
774 the report to your desktop's preferred mail client, if there is one.
775 This uses either the "xdg-email" utility, or Mac OS's "open" command.
777 *** See Changes in Specialized Modes and Packages for SMTPmail changes
778 and Mail mode changes
780 ** Emacs server and client changes
782 *** New option `server-port' specifies the port for TCP Emacs servers.
784 *** New emacsclient argument -q/--quiet suppresses some status messages.
786 *** New emacsclient argument --frame-parameters specifies the frame
787 parameters of any newly-created graphical frame.
789 *** If emacsclient shuts down due to Emacs signaling an error,
790 its exit status is 1.
792 *** New emacsclient argument --parent-id ID.
793 This opens a client frame in parent X window ID, via XEmbed, similar
794 to the --parent-id argument to Emacs.
796 ** Internationalization changes
798 *** Emacs now supports display and editing of bidirectional text.
799 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
800 displayed in the correct visual order as expected by users of those
801 scripts. The display reordering is a "full bidirectionality" class
802 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
803 with no RTL text should look exactly the same as before.
805 **** New buffer-local variable `bidi-display-reordering'.
806 To disable display reordering in a buffer, change this to nil.
808 **** New buffer-local variable `bidi-paragraph-direction'.
809 If nil (the default), Emacs determines the base direction of each
810 paragraph from its text, as specified by the UBA. Setting the value
811 to `right-to-left' or `left-to-right' forces a base direction on each
814 Paragraphs with right-to-left base direction are displayed starting at
815 the right window edge.
817 *** Enhanced support for characters with no glyphs in available fonts,
818 or, on text terminals, characters that cannot be encoded by the
819 terminal coding system. The new option `glyphless-char-display-control'
820 specifies how to display them: as a hexadecimal code in a box, a thin
821 1-pixel space, an empty box, etc.
823 *** New input methods for Farsi and Bulgarian
824 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
826 *** `nobreak-char-display' now also highlights Unicode hyphen chars
829 *** New Hebrew translation of the Emacs Tutorial.
830 Type `C-u C-h t' to choose it in case your language setup doesn't
831 automatically select it.
833 ** An Emacs Lisp package manager is now included.
834 This is a convenient way to download and install additional packages,
835 from a package repository at http://elpa.gnu.org.
837 *** M-x list-packages shows a list of packages, which can be
838 selected for installation.
840 *** New command `describe-package', bound to `C-h P'.
842 *** By default, all installed packages are loaded automatically when
843 Emacs starts up. To disable this, set `package-enable-at-startup' to
844 nil. To specify the packages to load, customize `package-load-list'.
846 ** Custom theme changes
848 *** New command `M-x customize-themes', which provides a convenient
849 interface for enabling and disabling Custom themes.
851 *** New option `custom-theme-load-path' is the load path for themes.
852 Emacs no longer looks for Custom themes in `load-path'. The default
853 value of `custom-theme-load-path' says to look for themes in
854 `custom-theme-directory', followed by a subdirectory of
855 `data-directory' named "themes/", which contains a small selection of
856 built-in Custom themes.
858 *** New option `custom-safe-themes' records known-safe theme files.
859 If a theme is not in this list, Emacs queries before loading it, and
860 offers to save the theme to `custom-safe-themes' automatically. By
861 default, all themes included in Emacs are treated as safe.
863 ** Improved GTK integration
865 *** GTK scroll-bars are now placed on the right by default.
866 The function `set-scroll-bar-mode' can change this.
868 *** GTK tool bars can have just text, just images or images and text.
869 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
870 the default is taken from desktop settings.
872 *** GTK tool bars can be placed on any edge of the frame.
873 The frame-parameter tool-bar-position controls this. It takes the
874 values top, left, right or bottom. The Options => Show/Hide menu has
877 *** The default colors for selected text (the `region' face) are taken
878 from the GTK theme when Emacs is built with GTK.
880 *** Emacs uses GTK tooltips by default if built with GTK.
881 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
883 ** Graphical interface changes
885 *** On graphical displays, the mode-line no longer ends in dashes.
886 Also, the first dash (which does not indicate anything) is just
887 displayed as a space.
889 *** `menu-bar-select-buffer-function' lets you choose another operation
890 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
892 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
893 built with Xft. These fonts can be set via X resources, for example:
894 Emacs.pane.menubar.font: Courier-12
898 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
899 or if it receives a SIGINT signal in batch mode.
901 *** `kill-emacs-hook' is now also run in batch mode.
902 Third-party code which adds to `kill-emacs-hook' should check if they
903 do the right thing in batch mode.
907 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
908 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
909 of buffer at first key-press (instead they move to top/bottom of buffer)
910 when `scroll-error-top-bottom' is non-nil.
912 *** New option `scroll-error-top-bottom' (see above).
914 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
915 scroll a line instead of full screen.
917 *** New property `scroll-command' should be set on a command's symbol to
918 define it as a scroll command affected by `scroll-preserve-screen-position'.
920 *** If you customize `scroll-conservatively' to a value greater than 100,
921 Emacs will never recenter point in the window when it scrolls due to
922 cursor motion commands or commands that move point (e.f., `M-g M-g').
923 Previously, you needed to use `most-positive-fixnum' as the value of
924 `scroll-conservatively' to achieve the same effect.
926 *** "Aggressive" scrolling now honors the scroll margins.
927 If you customize `scroll-up-aggressively' or
928 `scroll-down-aggressively' and move point off the window, Emacs now
929 scrolls the window so as to avoid positioning point inside the scroll
932 ** Basic SELinux support has been added.
933 This requires Emacs to be linked with libselinux at build time.
935 *** Emacs preserves the SELinux file context when backing up.
936 Also, the function `copy-file' has an extra optional argument for
937 preserving SELinux context, and the return value of `backup-buffer'
938 now includes the SELinux context.
940 *** New functions `file-selinux-context' and `set-file-selinux-context'
941 get and set the SELinux context of a file.
945 *** `delete-by-moving-to-trash' now only affects commands that specify
946 trashing. This avoids inadvertently trashing temporary files.
948 *** Calling `delete-file' or `delete-directory' with a prefix argument
949 now forces true deletion, regardless of `delete-by-moving-to-trash'.
951 ** File- and directory-local variable changes
953 *** You can stop directory local vars from applying to subdirectories.
954 Add an element (subdirs . nil) to the alist portion of any variables
955 settings to indicate that the section should not apply to
958 *** Directory local variables can apply to some file-less buffers.
959 Affected modes include dired, vc-dir, and log-edit. For example,
960 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
961 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
962 `hack-dir-local-variables-non-file-buffer' to support this.
964 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
965 Instead, use "eval: (minor-mode 1)".
967 *** The variable `inhibit-first-line-modes-regexps' has been renamed
968 to `inhibit-local-variables-regexps'. As the name suggests, it now
969 applies to ALL file local variables, not just -*- lines. The
970 associated `inhibit-first-line-modes-suffixes' has been renamed in the
975 *** The `quit-window' command now restores the last buffer displayed
976 in the quitted window.
978 *** Resizing an Emacs frame now preserves proportional window sizes,
979 modulo restrictions like window minimum sizes and fixed-size windows.
981 *** The behavior of `display-buffer' is now customizable in detail.
983 **** New option `display-buffer-base-action' specifies a list of
984 user-determined display "actions" (functions and optional arguments
985 for choosing the displaying window).
987 This takes precedence over the default display action, which is
988 specified by `display-buffer-fallback-action'.
990 **** New option `display-buffer-alist' maps buffer name regexps to
991 display actions, taking precedence over `display-buffer-base-action'.
993 *** New option `window-combination-limit'.
994 The new option `window-combination-limit' allows to return the space
995 obtained for resizing or creating a window more reliably to the window
996 from which such space was obtained.
998 *** New option `window-combination-resize'.
999 The new option `window-combination-resize' allows to split a window that
1000 otherwise cannot be split because it's too small by stealing space from
1001 other windows in the same combination. Subsequent resizing or deletion
1002 of the window will resize all windows in the same combination as well.
1004 *** New option `frame-auto-hide-function' lets you choose between
1005 iconifying or deleting a frame when burying a buffer in a dedicated
1006 frame, or quitting a window showing a buffer in a frame of its own.
1008 *** New commands `maximize-window' and `minimize-window'.
1009 These maximize and minimize the size of a window within its frame.
1011 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
1012 These functions allow to navigate through the live buffers that have
1013 been shown in a specific window.
1015 ** Minibuffer changes
1017 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
1018 This is handy for minibuffer-only frames, and is also used for the feature
1019 where mouse-1 pops up *Messages*"', which can now easily be changed.
1021 *** Minibuffers set `truncate-lines' to nil.
1022 If you want to change the value to something else, you could use
1023 for example `minibuffer-setup-hook'.
1025 ** `auto-mode-case-fold' is now enabled by default.
1027 ** `backup-by-copying-when-mismatch' now defaults to t.
1029 ** New basic faces `error', `warning', `success'.
1030 These are used to highlight text indicating failure, caution or
1031 successful operation.
1033 ** New option `list-colors-sort' defines the color sort order
1034 for `list-colors-display'.
1036 ** The variable `focus-follows-mouse' now always defaults to nil.
1039 * Editing Changes in Emacs 24.1
1043 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
1044 `isearch-yank-line'.
1046 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
1047 `isearch-yank-kill'.
1049 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
1051 ** New commands `count-words-region' and `count-words'.
1053 *** M-= is bound to `count-words-region', not `count-lines-region'.
1054 The `count-words-region' command, when called interactively, reports
1055 the number of lines, words, and characters in the region. It is a
1056 superset of the old `count-lines-region', which is now an obsolete
1059 ** The command `just-one-space' (M-SPC), if given a negative argument,
1060 also deletes newlines around point.
1064 *** New option `delete-active-region'.
1065 If non-nil, [delete] and DEL delete the region if it is active and no
1066 prefix argument is given. If set to `kill', those commands kill
1069 *** New command `delete-forward-char', bound to [delete].
1070 This is meant for interactive use, and obeys `delete-active-region'.
1071 The command `delete-char' does not obey `delete-active-region'.
1073 *** `delete-backward-char' is now a Lisp function.
1074 Apart from obeying `delete-active-region', its behavior is unchanged.
1075 However, the byte compiler now warns if it is called from Lisp; Lisp
1076 callers should use delete-char with a negative argument instead.
1078 *** The option `mouse-region-delete-keys' has been deleted.
1080 ** Selection changes.
1082 The default handling of clipboard and primary selections has been
1083 changed to conform with modern X applications. In short, most
1084 commands for killing and yanking text now use the clipboard, while
1085 mouse commands use the primary selection.
1087 In the following, we provide a list of these changes, followed by a
1088 list of steps to get the old behavior back if you prefer that.
1090 *** `select-active-regions' now defaults to t.
1091 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
1092 the kill ring. The selected text is put in the primary selection, if
1093 the system possesses a separate primary selection facility (e.g. X).
1095 **** `select-active-regions' also accepts a new value, `only'.
1096 This means to only set the primary selection for temporarily active
1097 regions (usually made by mouse-dragging or shift-selection);
1098 "ordinary" active regions, such as those made with C-SPC followed by
1099 point motion, do not alter the primary selection.
1101 **** `mouse-drag-copy-region' now defaults to nil.
1103 *** mouse-2 is now bound to `mouse-yank-primary'.
1104 This pastes from the primary selection, ignoring the kill-ring.
1105 Previously, mouse-2 was bound to `mouse-yank-at-click'.
1107 *** `x-select-enable-clipboard' now defaults to t on all platforms.
1109 *** `x-select-enable-primary' now defaults to nil.
1110 Thus, commands that kill text or copy it to the kill-ring (such as
1111 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
1113 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
1114 exactly equivalent to M-w, C-w, and C-y respectively.
1116 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
1117 non-nil by default, as Windows does not support the primary selection
1118 between applications.
1120 *** To return to the previous behavior, do the following:
1122 **** Change `select-active-regions' to nil.
1123 **** Change `mouse-drag-copy-region' to t.
1124 **** Change `x-select-enable-primary' to t (on X only).
1125 **** Change `x-select-enable-clipboard' to nil.
1126 **** Bind `mouse-yank-at-click' to mouse-2.
1128 *** Support for X cut buffers has been removed.
1130 *** X clipboard managers are now supported.
1131 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
1133 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
1134 in the current rectangle. With a prefix argument, this prompts for a
1135 number to count from and for a format string.
1137 ** `redisplay-dont-pause' now defaults to t.
1138 This makes Emacs feel more responsive to editing commands that arrive
1139 at high rate, e.g. if you lean on some key, because stopping redisplay
1140 in the middle (when this variable is nil) forces more expensive
1141 updates later on, and Emacs appears to be unable to keep up.
1143 ** The behavior of <TAB> for active regions in Text mode has changed.
1144 In Text and related modes, typing <TAB> (`indent-for-tab-command')
1145 when the region is active causes Emacs to indent all the lines in the
1146 region, aligning them with the line previous to the first line in the
1147 region (or with the left margin if there is no previous line).
1149 ** When `occur' is called with a prefix argument, matching strings are
1150 collected into the `*Occur*' buffer without line numbers. If there
1151 are parenthesized subexpressions in the specified regexp, `occur'
1152 reads replacement text that may contain \\& and \\N whose convention
1153 follows `replace-match'.
1156 * Changes in Specialized Modes and Packages in Emacs 24.1
1158 ** Archive Mode has basic support for browsing and updating 7z archives.
1162 *** BibTeX mode now supports biblatex.
1163 Use the variable `bibtex-dialect' to select different BibTeX dialects.
1164 `bibtex-entry-field-alist' is now an obsolete alias for
1165 `bibtex-BibTeX-entry-alist'.
1167 *** New command `bibtex-search-entries', bound to C-c C-a.
1169 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
1171 *** New variable `bibtex-search-entry-globally'.
1175 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
1177 *** The default browser used by the package is now the "xdg-open" program,
1178 on platforms that support it. This calls your desktop's preferred browser.
1180 ** Calendar, Diary, and Appt
1182 *** Diary entries can contain non-printing "comments".
1183 See the variable `diary-comment-start'.
1185 *** Appointments can specify their individual warning times.
1186 See the variable `appt-warning-time-regexp'.
1188 *** The function specified by `appt-disp-window-function' may be passed
1189 lists of arguments if multiple appointments are due at similar times.
1190 If you are using a custom function for this, you should update it.
1192 *** New function `diary-hebrew-birthday'.
1194 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
1195 may no longer be nil, but must all be strings.
1197 *** The obsolete (since Emacs 22.1) method of enabling the appt
1198 package by adding `appt-make-list' to `diary-hook' has been removed.
1199 Use `appt-activate' instead.
1201 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
1202 appt-issue-message (use the function appt-activate)
1203 appt-visible/appt-msg-window (use the variable appt-display-format)
1205 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
1206 view-diary-entries, list-diary-entries, show-all-diary-entries
1210 *** New feature to "guess" the style in an existing buffer.
1211 The main entry point is M-x c-guess.
1213 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
1215 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
1216 Thus C-M-a will, by default, go to the beginning of the immediate function,
1219 *** "Macros with semicolons" can be registered for correct indentation.
1220 Where such a macro ends a line (no semicolon) the next statement is no longer
1221 parsed as a statement continuation.
1223 ** Comint and modes derived from it use the standard completion code.
1227 *** Compilation mode can be used without Font Lock mode.
1228 `compilation-parse-errors-function' is now obsolete.
1230 *** New variable `compilation-filter-start', which is bound while
1231 `compilation-filter-hook' runs. It records the start position of the
1232 text inserted by `compilation-filter'.
1234 *** `compilation-error-screen-columns' and `compilation-first-column'
1235 are obeyed in the editing buffer. So programming language modes can
1236 set them, whereas previously only the value in the *Compilation*
1241 *** Customize buffers now contain a search field.
1242 The search is performed using `customize-apropos'.
1243 To turn off the search field, set `custom-search-field' to nil.
1245 *** Options in customize group buffers start out hidden if not customized.
1246 Use the arrow to the left of the option name to toggle visibility.
1248 *** custom-buffer-sort-alphabetically now defaults to t.
1250 *** The color widget now has a "Choose" button, which allows you to
1251 choose a color via `list-colors-display'.
1255 *** It is now possible to access buses other than the default system
1258 *** The `dbus-register-method' and `dbus-register-property' functions
1259 optionally do not register names.
1261 *** The new function `dbus-register-service' registers a known service
1262 name on a D-Bus without also registering a property or a method.
1266 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
1267 if called with a prefix argument, read a file name from the minibuffer
1268 instead of using the current buffer.
1270 *** The "dired local variables" feature of Dired-x is obsolete.
1271 The standard directory local variables feature replaces it.
1275 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
1276 controlling attempts to autojoin a channel.
1278 *** New variable `erc-coding-system-precedence': If we use `undecided'
1279 as the server coding system, this variable will then be consulted.
1280 The default is to decode strings that can be decoded as utf-8 as
1281 utf-8, and do the normal `undecided' decoding for the rest.
1285 *** The default value of `eshell-directory-name' has changed
1286 to be an "eshell" directory in `user-emacs-directory'.
1287 The old "~/.eshell/" directory is still used if it exists, though.
1291 *** The M-x gdb command now uses the GDB Machine Interface protocol.
1292 It now supports multithread non-stop debugging and simultaneous
1293 debugging of several threads.
1297 *** RET (`image-toggle-animation') toggles animation, if applicable.
1298 Animation plays once, unless the option `image-animate-loop' is non-nil.
1302 *** New command M-x info-display-manual displays a named Info manual.
1303 If that manual is already visited in some Info buffer, it displays
1304 that buffer. (This is handy if you have many manuals in many *info*
1305 buffers, and don't remember the name of the buffer visiting the manual
1306 you want to consult.) Otherwise, it loads and displays the manual.
1308 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
1309 This is for compatibility with the stand-alone Info reader program,
1310 and also because `Info-edit' is a rarely used command that is disabled
1313 ** Mail mode changes (not Message mode)
1315 *** New command M-x mail-add-attachment for adding MIME attachments
1317 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
1318 (Its name is misleading, since it has nothing to do with MIME
1319 attachments.) The old name is now an obsolete alias to the new name.
1321 ** MH-E has been updated to MH-E version 8.3.1.
1322 See MH-E-NEWS for details.
1324 ** Modula-2 mode provides auto-indentation.
1326 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
1328 ** nXML mode no longer binds C-RET to `nxml-complete'.
1329 Completion is now performed via `completion-at-point', bound to C-M-i
1330 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
1331 default), this performs tag completion.
1333 ** Org mode has been updated to version 7.8.09.
1334 See ORG-NEWS for details.
1336 ** Prolog mode has been completely revamped, with lots of additional
1337 functionality such as more intelligent indentation, electricity,
1338 support for more variants, including Mercury, and a lot more.
1342 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
1343 in the Rmail incoming message.
1345 *** The variable `rmail-message-filter' no longer has any effect.
1346 This change was made in Emacs 23.1 but was not advertised at the time.
1347 Try using `rmail-show-message-hook' instead.
1351 *** M-x shell prompts for the shell path name if the default directory
1352 is a remote file name and neither the environment variable $ESHELL nor
1353 the variable `explicit-shell-file-name' is set.
1355 *** TAB is now bound to the standard `completion-at-point' command,
1356 which now implements the pcomplete rules for shell command completion.
1360 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
1361 if the mail server supports them. This uses either built-in GnuTLS
1362 support, or the starttls.el library. Customize `smtpmail-stream-type'
1365 *** The variable `smtpmail-auth-credentials' has been removed.
1366 By default, the information is now stored in the file ~/.authinfo.
1367 This was the default value of smtpmail-auth-credentials. If you had
1368 customized smtpmail-auth-credentials to a list of user names and
1369 passwords, those settings are not used. During your first connection
1370 to the smtp server, Emacs will prompt for the user name and password,
1371 and offer to save them to ~/.authinfo. Or you can manually copy the
1372 credentials to ~/.authinfo. For example, if you had
1374 (setq smtpmail-auth-credentials
1375 '(("mail.example.org" 25 "jim" "s!cret")))
1377 then the equivalent line in ~/.authinfo would be
1379 machine mail.example.org port 25 login jim password s!cret
1381 See the auth-source manual for more information, e.g. on encrypting
1382 the credentials file.
1384 *** The variable `smtpmail-starttls-credentials' has been removed.
1385 If you had that set, you need to put
1387 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
1389 in your ~/.authinfo file instead.
1393 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
1394 and `sql-oracle-scan-on'.
1396 *** New options controlling prompting for login parameters.
1397 Each supported product has a custom variable `sql-*-login-params',
1398 which is a list of the parameters to be prompted for before a
1399 connection is established.
1401 *** The command `sql-product-interactive' now takes a prefix argument,
1402 which causes it to prompt for an SQL product.
1404 *** Product-specific SQL interactive commands now take prefix arguments.
1405 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
1406 given a prefix argument, prompt for a name for the SQL interactive
1407 buffer. This reduces the need for calling `sql-rename-buffer'.
1409 *** SQL interactive modes suppress command continuation prompts, and
1410 replace tabs with spaces. The first change impacts multiple line SQL
1411 statements entered with C-j between each line, statements yanked into
1412 the buffer and statements sent with `sql-send-*' functions. The
1413 second prevents the MySQL and Postgres interpreters from listing
1414 object name completions when sent text via `sql-send-*' functions.
1416 *** New command `sql-connect' starts a predefined SQLi session,
1417 using the login parameters from `sql-connection-alist'.
1419 *** New "Save Connection" menu item in SQLi buffers.
1420 This gathers the login params specified for the SQLi session, if it
1421 was not started by a connection, and saves them as a new connection.
1423 *** New commands for listing database objects and details:
1424 sql-list-all and sql-list-table.
1426 *** An API for manipulating SQL product definitions has been added.
1430 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
1434 *** New inline access method "ksu" (kerberized su).
1436 *** The following access methods are discontinued: "ssh1_old",
1437 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
1439 *** The user option `remote-file-name-inhibit-cache' controls whether
1440 remote file attributes are cached for better performance.
1442 *** The option `ange-ftp-binary-file-name-regexp' has changed its
1443 default value to "".
1445 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
1446 for remote machines which support SELinux.
1448 ** New function `url-queue-retrieve', which behaves like url-retrieve,
1449 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
1450 the degree of parallelism.
1452 ** VC and related modes
1454 *** Support for pulling on distributed version control systems.
1455 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
1456 supported (currently with Bzr, Git, and Mercurial), to update the
1457 current branch and working tree. A prefix argument means to prompt
1458 the user for specifics, e.g. a pull location.
1460 *** `vc-update' is now an alias for `vc-pull'.
1462 *** Support for merging on distributed version control systems.
1463 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
1464 is supported (currently with Bzr, Git, and Mercurial), to merge
1465 changes from another branch into the current one. It prompts for
1466 specifics, e.g. a merge source.
1468 *** New option `vc-revert-show-diff' controls whether `vc-revert'
1469 shows a diff while querying the user. It defaults to t.
1471 *** Log entries in some Log View buffers can be toggled to display a
1472 longer description by typing RET (log-view-toggle-entry-display).
1473 This is currently supported for Bzr, Git, and Mercurial (to support
1474 another backend, define a `log-view-expanded-log-entry-function').
1475 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
1476 use this to display the full log entry for the revision at point.
1478 *** New command `vc-ediff' allows visual comparison of two revisions
1479 of a file similar to `vc-diff', but using ediff backend.
1481 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
1482 this was not advertised at the time.
1484 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
1485 Since Emacs 23, it has done the same thing as `toggle-read-only', but
1486 this was not advertised at the time.
1492 *** erc-hecomplete.el (use erc-pcomplete.el instead)
1494 *** partial-completion-mode (complete.el) is obsolete.
1495 You can get a comparable behavior with:
1496 (setq completion-styles '(partial-completion initials))
1497 (setq completion-pcm-complete-word-inserts-delimiters t)
1499 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
1501 *** pgg is obsolete (use EasyPG instead).
1503 *** sregex.el is obsolete, since rx.el is a strict superset.
1505 *** s-region.el and pc-select.el are obsolete.
1506 They are superseded by shift-select-mode, enabled by default since 23.1.
1508 *** vc-mcvs.el is obsolete (for lack of a maintainer).
1512 *** The Landmark game is now invoked with `landmark', not `lm'.
1513 Its functions and variables have been similarly renamed.
1515 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
1516 (This interfered with cua-mode.)
1518 *** f90.el has some support for Fortran 2008 syntax.
1520 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
1522 *** New command `nato-region' converts text to NATO phonetic alphabet.
1525 * New Modes and Packages in Emacs 24.1
1527 ** Occur Edit mode applies edits made in *Occur* buffers to the
1528 original buffers. It is bound to "e" in Occur mode.
1530 ** New global minor mode electric-pair-mode.
1531 When enabled, typing an open parenthesis automatically inserts the
1532 matching closing one.
1534 ** New global minor mode electric-indent-mode.
1535 When enabled, typing certain characters triggers reindentation.
1536 Major modes wishing to use this can set electric-indent-chars or
1537 electric-indent-functions.
1539 ** New global minor mode electric-layout-mode.
1540 When enabled, typing certain characters automatically inserts newlines.
1541 Major modes wishing to use this can set electric-layout-rules.
1543 ** tabulated-list.el provides a generic major mode for tabulated data,
1544 from which other modes can be derived.
1546 ** pcase.el provides the ML-style pattern matching macro `pcase'.
1548 ** secrets.el is an implementation of the Secret Service API, an
1549 interface to password managers like GNOME Keyring or KDE Wallet. The
1550 Secret Service API requires D-Bus for communication. The command
1551 `secrets-show-secrets' offers a buffer with a visualization of the
1554 ** notifications.el provides an implementation of the Desktop
1555 Notifications API. It requires D-Bus for communication.
1557 ** soap-client.el supports access to SOAP web services from Emacs.
1558 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
1560 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
1562 ** New emacs-lock.el package.
1563 The previous version has been moved to obsolete/old-emacs-lock.el.
1564 Now, there is a proper minor mode `emacs-lock-mode'. Protection
1565 against exiting Emacs and killing the buffer can be set separately.
1566 The mechanism for automatically turning off protection for buffers
1567 with dead inferior processes has been generalized.
1570 * Incompatible Lisp Changes in Emacs 24.1
1572 ** Passing a nil argument to a minor mode function call now ENABLES
1573 the minor mode unconditionally. This is so that you can write e.g.
1575 (add-hook 'text-mode-hook 'foo-mode)
1577 to enable foo-mode in Text mode buffers, removing the need for
1578 `turn-on-foo-mode' style functions. This affects all mode commands
1579 defined by `define-minor-mode'. If called interactively, the mode
1580 command still toggles the minor mode.
1582 ** The return value of `backup-buffer' has changed.
1583 It is now a list of three elements, where the second element is a list
1584 describing the original file's SELinux context. If Emacs or the
1585 system lacks SELinux support, the context list is (nil nil nil nil).
1586 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
1588 ** `char-direction-table' and the `char-direction' function were deleted.
1589 They were buggy and inferior to the new support of bidirectional
1590 editing introduced in Emacs 24. If you need the bidirectional
1591 properties of a character, use `get-char-code-property' with the last
1592 argument `bidi-class'.
1594 ** `copy-directory' now copies the source directory as a subdirectory
1595 of the target directory, if the latter is an existing directory. The
1596 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
1597 the contents directly into a pre-existing target directory.
1599 ** For mouse click input events in the text area, the Y pixel
1600 coordinate in the POSITION list now counts from the top of the text
1601 area, excluding any header line. Previously, it counted from the top
1604 ** Support for "old-style" backquotes, obsolete for 10+ years, has
1605 been further reduced. Now a backquote not followed by a space is
1606 always treated as a "new-style" backquote. Please remove all
1607 "old-style" backquotes from your code. If your code uses backquotes
1608 as documented in the Elisp manual, and compiles without warning, then
1609 you have nothing to do in this regard. Code not following the
1610 appropriate conventions may fail to compile.
1612 The most common cause of trouble seems to be an old-style backquote
1613 followed by a newline. Another cause of trouble is vector notation
1614 for key sequence notation: instead of [(control ,)] and [(control ')],
1615 you should write [(control ?,)] and [(control ?')], which will work in
1618 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
1619 was not advertised at the time. The function `custom-initialize-delay'
1620 replaced all known uses.
1622 ** `view-buffer' now treats special mode-class in the same way that
1623 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
1624 major mode is special).
1626 ** Menu and tool bar changes
1628 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
1629 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
1630 With these alist entries omitted, `make-frame' checks the value of the
1631 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
1632 a menu-bar or tool-bar, respectively. If the alist entries are added,
1633 they override the value of `menu-bar-mode'/`tool-bar-mode'.
1635 *** The menu bar bindings's caches are not used any more.
1636 Use (where-is-internal <def> nil t) instead.
1638 ** Regions created by mouse dragging are now normal active regions,
1639 similar to those created by shift-selection (see Selection changes
1640 above). In previous Emacs versions, these regions were delineated by
1641 `mouse-drag-overlay'; that variable has been removed.
1643 ** The fourth argument of `filter-buffer-substring' has been removed.
1644 If you want to remove text properties from the final result, simply
1645 pass the result through substring-no-properties.
1647 ** cl.el no longer provides `cl-19'.
1649 ** The following obsolete functions and aliases have been removed
1650 (the appropriate new function is given in parentheses; "not needed"
1651 means you can just remove all calls to the function in question):
1653 *** `comint-kill-output' (`comint-delete-output')
1654 *** `decompose-composite-char' (`char-to-string')
1655 *** `outline-visible' (`outline-invisible-p')
1656 *** `internal-find-face' (`facep')
1657 *** `internal-get-face' (`facep and check-face')
1658 *** `frame-update-faces' (not needed)
1659 *** `frame-update-face-colors' (`frame-set-background-mode')
1660 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
1661 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
1662 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
1663 *** `x-make-font-bold-italic' (`make-face-bold-italic')
1664 *** `x-make-font-unbold' (`make-face-unbold')
1665 *** `x-make-font-unitalic' (`make-face-unitalic')
1666 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
1667 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
1668 *** `iswitchb-default-keybindings' (`iswitchb-mode')
1669 *** `char-bytes' (== 1)
1670 *** `isearch-return-char' (`isearch-printing-char')
1671 *** `make-local-hook' (not needed)
1672 *** `set-screen-height' (`set-frame-height')
1673 *** `set-screen-width' (`set-frame-width')
1675 ** The following obsolete variables and varaliases have been removed
1676 (the appropriate new variable is given in parentheses):
1678 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
1679 *** `vc-header-alist' (`vc-BACKEND-header')
1680 *** `directory-sep-char' (== ?/)
1681 *** `font-lock-defaults-alist' (`font-lock-defaults')
1682 *** `e' (`float-e').
1684 ** The following obsolete files were removed:
1685 sc.el, x-menu.el, rnews.el, rnewspost.el
1687 ** The format of the finder-inf.el file has changed, since the Finder
1688 mechanism is now based on the package system. The variable
1689 `finder-package-info' is replaced by `package--builtins' and
1690 `finder-keywords-hash'.
1692 ** When generating autoloads, `update-directory-autoloads' no longer
1693 assumes every inspected file is in your `load-path'. It instead
1694 generates relative names according to the current `load-path'.
1697 * Lisp changes in Emacs 24.1
1699 ** Code can now use lexical scoping by default instead of dynamic scoping.
1700 The `lexical-binding' variable enables lexical scoping for local
1701 variables. It is typically set via a file-local variable in the first
1702 line of the file, in which case it applies to all the code in that
1705 *** `eval' takes a new optional argument `lexical' to choose the new lexical
1706 binding instead of the old dynamic binding mode.
1708 *** Lexically scoped interpreted functions are represented with a new form
1709 of function value which looks like (closure ENV ARGS &rest BODY).
1711 *** New macro `letrec' to define recursive local functions.
1713 *** `defvar' and `defconst' now mark the variable as special (dynamic).
1714 So do `defcustom' and other forms that call `defvar' as a subroutine.
1716 *** New function `special-variable-p' to check whether a variable is
1717 declared as dynamically bound.
1719 *** The form ((lambda ...) ...) is deprecated.
1721 ** An Emacs Lisp testing tool is now included.
1722 Emacs Lisp developers can use this tool to write automated tests for
1723 their code. See the ERT info manual for details.
1725 ** Changes for bidirectional display and editing
1727 *** New function `current-bidi-paragraph-direction'.
1728 This returns the base direction of the paragraph at point.
1730 *** New function `bidi-string-mark-left-to-right'.
1731 Given a string containing characters from right-to-left scripts, this
1732 function returns another string which can be safely inserted into a
1733 buffer, such that any following text will be always displayed to the
1734 right of that string. (This works by appending an invisible Unicode
1735 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
1737 This is useful when the buffer has overall left-to-right paragraph
1738 direction and you need to insert a string whose contents are not known
1739 in advance, without disrupting the layout of the line.
1743 *** Window tree functions are accessible in Elisp.
1744 Functions are provided to return the parent, siblings or child windows
1745 of any window including internal windows (windows not associated with a
1746 buffer) in the window tree.
1748 **** New function `window-valid-p' gives non-nil for live and internal
1751 **** Window manipulation can deal with internal windows.
1752 Many window handling functions like `split-window', `delete-window', or
1753 `delete-other-windows' as well as the window resizing functions can now
1754 act on any window including internal ones.
1756 *** window-total-height/-width vs window-body-height/-width.
1757 The function `window-height' has been renamed to `window-total-height'
1758 and `window-width' has been renamed to `window-body-width'. The old
1759 names are provided as aliases. Two new functions `window-total-width'
1760 and `window-body-height' are provided.
1762 *** Window parameters specific to window handling functions.
1763 For each window you can specify a parameter to override the default
1764 behavior of a number of functions like `split-window', `delete-window'
1765 and `delete-other-windows'. The variable `ignore-window-parameters'
1766 allows to ignore processing such parameters.
1768 *** New semantics of third argument of `split-window'.
1769 The third argument of `split-window' has been renamed to SIDE and can be
1770 set to any of the values 'below, 'right, 'above, or 'left to make the
1771 new window appear on the corresponding side of the window that shall be
1772 split. Any other value of SIDE will cause `split-window' to split the
1773 window into two side-by-side windows as before.
1775 *** Window resizing functions.
1776 A new standard function for resizing windows called `window-resize' has
1777 been introduced. This and all other functions for resizing windows no
1778 longer delete any windows when they become too small.
1780 *** Deleting the selected window now selects the most recently selected
1781 live window on that frame instead.
1783 *** `adjust-window-trailing-edge' adjustments.
1784 `adjust-window-trailing-edge' can now deal with fixed-size windows and
1785 is able to resize other windows if a window adjacent to the trailing
1786 edge cannot be shrunk any more. This makes its behavior more similar to
1787 that of Emacs 21 without compromising, however, its inability to delete
1788 windows which was introduced in Emacs 22.
1790 *** Window-local buffer lists.
1791 Windows now have local buffer lists. This means that removing a buffer
1792 from display in a window will preferably show the buffer previously
1793 shown in that window with its previous window-start and window-point
1794 positions. This also means that the same buffer may be automatically
1795 shown twice even if it already appears in another window.
1797 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
1798 which if non-nil requires the buffer to be displayed in the currently
1799 selected window, signaling an error otherwise. If nil, another window
1800 can be used, e.g. if the selected one is strongly dedicated.
1802 *** `split-window-vertically' and `split-window-horizontally' renamed
1803 to `split-window-below' and `split-window-right' respectively.
1804 The old names are kept as aliases.
1808 **** The second arg to `display-buffer' and `pop-to-buffer' is now
1809 named ACTION, and takes a display action of the same form as
1810 `display-buffer-base-action' (see Changes, above). A non-nil,
1811 non-list value is treated specially, as the old meaning.
1813 **** New variable `display-buffer-overriding-action'.
1815 **** The procedure of `display-buffer' etc. to choose a window is
1816 determined by combining `display-buffer-overriding-action',
1817 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
1818 and `display-buffer-fallback-action'. The second and fourth of these
1819 are user-customizable variables.
1821 See the docstring of `display-buffer' for details.
1823 *** New functions `window-state-get' and `window-state-put'.
1824 These functions allow to save and restore the state of an arbitrary
1825 frame or window as an Elisp object.
1829 *** New variable `completion-extra-properties' used to specify extra
1830 properties of the current completion:
1831 - :annotate-function, same as the old completion-annotate-function.
1832 - :exit-function, function to call after completion took place.
1834 *** Functions on `completion-at-point-functions' can return any of the
1835 properties valid for `completion-extra-properties'.
1837 *** `completion-annotate-function' is obsolete.
1839 *** New `metadata' method for completion tables. The metadata thus returned
1840 can specify various details of the data returned by `all-completions':
1841 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
1842 used to select a style in completion-category-overrides.
1843 - `annotation-function' to add annotations in *Completions*.
1844 - `display-sort-function' to specify how to sort entries in *Completions*.
1845 - `cycle-sort-function' to specify how to sort entries when cycling.
1847 *** `minibuffer-local-filename-must-match-map' is not used any more.
1848 Instead, the bindings in `minibuffer-local-filename-completion-map'
1849 are combined with `minibuffer-local-must-match-map'.
1851 *** New variable `completing-read-function' allows overriding the
1852 behavior of `completing-read'.
1854 ** `glyphless-char-display' can now distinguish between graphical and
1855 text terminal display, via a char-table entry that is a cons cell.
1857 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
1858 Instead, the offending function is removed.
1862 *** New function `run-hook-wrapped' for running an abnormal hook by
1863 passing the hook functions as arguments to a "wrapping" function.
1864 Like `run-hook-with-args-until-success', it stops at the first
1865 non-nil return value.
1867 *** New macro `with-wrapper-hook' for running an abnormal hook as a
1868 set of "wrapping" filters, similar to around advice.
1869 (A version of this macro was actually added in Emacs 23.2 but was not
1870 advertised at the time.)
1874 *** New macro `condition-case-unless-debug' (this was actually added in
1875 Emacs 23.1 as condition-case-no-debug, but not advertised)
1877 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
1879 *** Variable `stack-trace-on-error' removed.
1881 *** The debugger can now "continue" from an error, which means it will
1882 jump to the error handler as if the debugger had not been invoked
1883 instead of jumping all the way to the top-level.
1885 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
1886 This can be useful when `inhibit-quit' is set.
1888 ** The new function `server-eval-at' allows evaluation of Lisp forms on
1889 named Emacs server instances.
1891 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
1892 to redirect STDOUT to a file.
1894 ** The function `format-time-string' now supports the %N directive,
1895 for higher-resolution time stamps.
1897 ** New input reading functions
1899 *** New function `read-char-choice' reads a restricted set of
1900 characters, discarding any inputs not inside the set.
1902 *** The command `read-color' now requires a match for a color name
1903 or RGB triplet, instead of signaling an error if the user provides
1906 **** `facemenu-read-color' is now an alias for `read-color'.
1908 ** `image-library-alist' is renamed to `dynamic-library-alist'.
1909 The variable is now used to load all kind of supported dynamic libraries,
1910 not just image libraries. The previous name is still available as an
1913 ** Syntax parsing changes
1915 *** New variable `syntax-propertize-function'.
1916 This replaces `font-lock-syntactic-keywords' which is now obsolete.
1917 This allows syntax-table properties to be set independently from font-lock:
1918 just call syntax-propertize to make sure the text is propertized.
1919 Together with this new variable come a new hook
1920 syntax-propertize-extend-region-functions, as well as two helper functions:
1921 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
1922 as-is; and syntax-propertize-rules which provides a new way to specify
1925 *** Syntax tables support a new "comment style c" additionally to style b.
1927 ** New hook `post-self-insert-hook', run after `self-insert-command'.
1929 ** frame-local variables cannot be let-bound any more.
1931 ** Major and minor mode changes
1933 *** `set-auto-mode' now respects mode: local variables at the end of files,
1934 as well as those in the -*- line.
1936 *** `prog-mode' is a new major mode from which programming modes
1939 **** `prog-mode-hook' can be used to enable features for programming
1940 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
1941 on-the-fly spell checking for comments and strings.
1943 *** New hook `change-major-mode-after-body-hook', run by
1944 `run-mode-hooks' just before any other mode hooks.
1946 *** Enabled globalized minor modes can be disabled in specific major modes.
1947 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
1948 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
1950 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
1952 ** File-handling changes
1954 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
1955 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
1956 both non-nil. Interactively, TRASH defaults to t, unless a prefix
1957 argument is supplied (see Trash changes, above).
1959 *** New file predicates: `file-equal-p', `file-in-directory-p'.
1961 ** Tool-bars can display separators.
1962 Tool-bar separators are handled like menu separators in menu-bar maps,
1963 i.e. via menu entries of the form `(menu-item "--")'.
1967 *** Animated images support (currently animated gifs only).
1969 **** `image-animated-p' returns non-nil if an image can be animated.
1971 **** `image-animate' animates a supplied image spec.
1973 **** `image-animate-timer' returns the timer object for an image that
1976 *** `image-extension-data' has been renamed to `image-metadata'.
1977 The old name is an obsolete alias to the new one.
1979 *** Image mode can view any image type that ImageMagick supports.
1980 This requires Emacs to be built with ImageMagick support.
1982 **** New function `imagemagick-types', defined if ImageMagick support
1983 is enabled, returns a list of image file extensions that your
1984 ImageMagick installation supports.
1986 **** New function `imagemagick-register-types' enables ImageMagick
1987 image types in Image mode and in `create-image' and other helper
1990 **** New option `imagemagick-types-inhibit' excludes certain
1991 ImageMagick image types from `imagemagick-register-types'.
1993 **** With ImageMagick support, there are extra Image mode commands to
1994 resize and rotate images: `image-transform-fit-to-height',
1995 `image-transform-fit-to-width', `image-transform-set-rotation', and
1996 `image-transform-set-scale'.
1998 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
1999 passes it to the mail user agent function. This argument specifies an
2000 action for returning to the caller after finishing with the mail. For
2001 example, this is used by Rmail to optionally delete a mail window.
2003 ** XML and HTML parsing
2004 If Emacs is compiled with libxml2 support, there are two new
2005 functions: `libxml-parse-html-region' (which parses "real world" HTML)
2006 and `libxml-parse-xml-region' (which parses XML). Both return an
2007 Emacs Lisp parse tree.
2009 ** Networking and encryption changes
2011 *** `open-network-stream' can now be used to open an encrypted stream.
2012 It now accepts an optional `:type' parameter for initiating a TLS
2013 connection, directly or via STARTTLS. To do STARTTLS, additional
2014 parameters (`:end-of-command', `:success', `:capabilities-command')
2015 must also be supplied.
2017 *** New library gnutls.el.
2018 The new function `gnutls-available-p' returns non-nil if Emacs is
2019 built with GnuTLS support. The main entry points are
2020 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
2021 these functions through `open-network-stream', because that can
2022 upgrade connections through STARTTLS opportunistically or use plain
2023 SSL, depending on your needs. For debugging, set `gnutls-log-level'
2026 *** New primitive `secure-hash' that supports many secure hash algorithms:
2027 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
2028 sha1.el has been removed. The `sha1' feature is provided by default.
2032 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
2034 ** Progress reporters can now "spin".
2035 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
2036 now be nil, or omitted. This makes a "non-numeric" reporter. Each
2037 time you call `progress-reporter-update' on that progress reporter,
2038 with a nil or omitted VALUE argument, the reporter message is
2039 displayed with a "spinning bar".
2041 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
2042 being reverted, even if the buffer has a local `revert-buffer-function'.
2044 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
2045 If delayed-warnings-list is non-nil, the command loop calls
2046 `delayed-warnings-hook' after `post-command-hook'. At present, this
2047 is only used by Emacs on some platforms to display warnings during
2048 startup, which might otherwise not be noticed. This uses the
2049 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
2051 ** rx.el has a new `group-n' construct for explicitly numbered groups.
2053 ** New function `make-composed-keymap' that constructs a new keymap
2054 from multiple input maps. You can use this to make a keymap that
2055 inherits from multiple maps, eg:
2056 (set-keymap-parent newmap (make-composed-keymap othermap parent))
2058 ** New function `string-prefix-p'.
2059 (This was actually added in Emacs 23.2 but was not advertised at the time.)
2061 ** New reader macro ## that stands for the empty symbol.
2062 This means that the empty symbol can now be read back. Also, #: by itself
2063 (when not immediately followed by a possible symbol character) stands for
2064 an empty uninterned symbol.
2066 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
2068 ** The following functions and variables are obsolete:
2070 *** `tooltip-use-echo-area' is obsolete.
2071 Rather than setting this to t, disable Tooltip mode instead.
2073 *** buffer-substring-filters is obsolete.
2074 Use `filter-buffer-substring-functions' instead.
2076 *** `byte-compile-disable-print-circle' is obsolete.
2078 *** `deferred-action-list' and `deferred-action-function' are obsolete.
2079 Use `post-command-hook' instead.
2081 *** `font-lock-maximum-size' is obsolete.
2084 * Changes in Emacs 24.1 on non-free operating systems
2086 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
2087 and also when HOME is set to C:\ by default.
2089 ** New configure.bat options
2091 *** --enable-checking builds Emacs with extra runtime checks.
2093 *** --distfiles specifies files to be included in binary distribution.
2095 *** --without-gnutls disables automatic GnuTLS detection.
2097 *** --lib for general library linkage, works with the USER_LIBS build variable.
2099 ** New make target `dist' to create binary distribution for MS Windows.
2101 ** The Lisp function `w32-default-color-map' is now obsolete.
2102 (It is only used internally in the Emacs C code.)
2104 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
2105 reappear on mouse-over. (Requires OS X 10.6 or later.)
2107 ** On Mac OS X, dragging a file into Emacs visits the file, like on
2108 other platforms, rather than inserting its contents into the buffer.
2111 ----------------------------------------------------------------------
2112 This file is part of GNU Emacs.
2114 GNU Emacs is free software: you can redistribute it and/or modify
2115 it under the terms of the GNU General Public License as published by
2116 the Free Software Foundation, either version 3 of the License, or
2117 (at your option) any later version.
2119 GNU Emacs is distributed in the hope that it will be useful,
2120 but WITHOUT ANY WARRANTY; without even the implied warranty of
2121 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2122 GNU General Public License for more details.
2124 You should have received a copy of the GNU General Public License
2125 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2130 paragraph-separate: "[
\f]*$"