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 24.2
26 ** New configure option '--enable-gcc-warnings', intended for developers.
27 If building with GCC, this enables compile-time checks that warn about
28 possibly-questionable C code. On a recent GNU system there should be
29 no warnings; on older and on non-GNU systems the generated warnings
32 ** The configure option '--disable-maintainer-mode' has been removed,
33 as it was confusingly-named and rarely useful.
36 ** Emacs uses libtinfo in preference to libncurses, if available.
39 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
40 /usr/pkg/lib to the linker search path. You must add them yourself if
44 ** On Mac OS X, configure no longer automatically adds the Fink /sw
45 directories to the search path. You must add them yourself if you want them.
48 * Startup Changes in Emacs 24.2
50 ** Emacs no longer searches for `leim-list.el' files beneath the standard
51 lisp/ directory. There should not be any there anyway. If you have
52 been adding them there, put them somewhere else, eg site-lisp.
55 * Changes in Emacs 24.2
57 ** New functions `system-users', `system-groups' return lists of the user
58 name, group names known to the system (where possible).
60 ** If your Emacs was built from a bzr checkout, the new variable
61 `emacs-bzr-version' contains information about which bzr revision was used.
63 ** ImageMagick support, if available, is automatically enabled.
64 It is no longer necessary to call `imagemagick-register-types'
65 explicitly to install ImageMagick image types; that function is called
66 automatically at startup, or when customizing a relevant imagemagick-
69 *** Setting `imagemagick-types-inhibit' to t now disables the use of
70 ImageMagick to view images. You must call imagemagick-register-types
71 afterwards if you do not use customize to change this.
73 *** The new variable `imagemagick-enabled-types' also affects which
74 ImageMagick types are treated as images. The function
75 `imagemagick-filter-types' returns the list of types that will be
78 ** String values for `initial-buffer-choice' also apply to emacsclient
79 frames, if emacsclient is only told to open a new frame without
80 specifying any file to visit or expression to evaluate.
83 ** You can prevent the creation of lock files by setting `create-lockfiles'
84 to nil. Use with caution, and only if you really need to.
87 ** Using "unibyte: t" in Lisp source files is obsolete.
88 Use "coding: raw-text" instead.
92 *** New option `mode-line-default-help-echo' specifies the help text
93 (shown in a tooltip or in the echo area) for any part of the mode line
94 that does not have its own specialized help text.
96 *** You can now click mouse-3 in the coding system indicator to
97 invokes `set-buffer-file-coding-system'.
100 * Editing Changes in Emacs 24.2
104 *** Global `M-s _' starts a symbol (identifier) incremental search,
105 and `M-s _' in Isearch toggles symbol search mode.
106 `M-s c' in Isearch toggles search case-sensitivity.
108 ** M-x move-to-column, if called interactively with no prefix arg, now
109 prompts for a column number.
111 ** `mouse-avoidance-banish-position' can now be used to customize
112 `mouse-avoidance-mode' further.
114 ** `C-M-f' and `C-M-b' will now move to the path name separator
115 character when doing minibuffer filename prompts.
117 ** `goto-char' is now bound to `M-g c'.
120 * Changes in Specialized Modes and Packages in Emacs 24.2
122 ** CL's main entry is now (require 'cl-lib).
123 `cl-lib' is like the old `cl' except that it uses the namespace cleanly,
124 i.e. all its definitions have the "cl-" prefix.
126 If `cl' provided a feature under the name `foo', then `cl-lib' provides it
127 under the name `cl-foo' instead, with the exceptions of the few definitions
128 that had to use `foo*' to avoid conflicts with pre-existing Elisp entities,
129 which have not been renamed to `cl-foo*' but just `cl-foo'.
131 The old `cl' is now deprecated and is nothing more than a bunch of aliases that
132 provide the old non-prefixed names.
135 - Support for ghdl (free vhdl compiler). Now default.
136 - Add/update support for VHDL-AMS packages.
137 - Update to VHDL'02 standard.
138 - Accept \r and \f as whitespace.
142 Faces for changes now use the same diff color scheme as in modern VCSes
143 where deletions are displayed in red (new faces `diff-refine-removed'
144 and `smerge-refined-removed' and new definition of `diff-removed'),
145 insertions in green (new faces `diff-refine-added' and
146 `smerge-refined-added' and new definition of `diff-added').
147 The variable `diff-use-changed-face' defines whether to use
148 the face `diff-changed', or `diff-removed' and `diff-added'
149 to highlight changes in context diffs.
151 ** Ediff now uses the same color scheme as Diff mode
152 on high color displays.
155 *** Pairing of parens/quotes uses electric-pair-mode instead of skeleton-pair.
156 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
157 *** `sh-use-smie' lets you choose a new indentation and navigation code.
159 ** reStructuredText mode
161 *** Rebind nearly all keys making room for more keys and complying
162 better to usage in other modes. Describe bindings with C-c C-h.
164 *** Major revision of indentation working very similar to other
165 modes. TAB is your friend.
167 *** Major revision of filling working fine with most of
168 reStructuredText syntax. Support auto-filling.
170 *** Major revision of comment handling.
172 *** Major revision of fontification working with `jit-lock-mode'.
174 *** Cover reStructuredText syntax more closely. Improve
175 the experience for Sphinx users.
177 *** `rst-insert-list' inserts new list or continues existing lists.
179 *** Extend correct and improve customization.
181 *** Negative prefix argument always works for `rst-adjust'.
183 *** Reset window configuration after displaying TOC.
185 *** Package version in `rst-version'.
187 ** New `derived-mode' filter for Ibuffer, bound to `/ M'.
188 `/ m' is now bound to filter by used-mode, which used to be bound to `/ M'.
192 *** The faces used by Apropos are now directly customizable.
193 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
194 see the `apropos' Custom group for details.
196 **** The old options whose values specified faces to use were removed
197 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
201 *** The calendars produced by cal-html include holidays.
202 Customize cal-html-holidays to change this.
206 *** `custom-reset-button-menu' now defaults to t.
208 *** Non-option variables are never matched in `customize-apropos' and
209 `customize-apropos-options' (i.e. the prefix argument does nothing for
212 ** erc will look up server/channel names via auth-source and use the
213 channel keys found, if any.
217 *** The option `ffap-url-unwrap-remote' can now be a list of strings,
218 specifying URL types which should be converted to remote file names at
219 the FFAP prompt. The default is now '("ftp").
223 *** The obsolete variable `follow-mode-off-hook' has been removed.
225 *** Follow mode no longer works by using advice.
226 The option `follow-intercept-processes' has been removed.
228 ** The `server-auth-key' variable can be used to set a permanent
229 shared key for Emacs Server.
231 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
232 closing brackets to be aligned with the line of the opening bracket.
234 ** FIXME something happened to ses.el, 2012-04-17.
236 ** which-function-mode now applies to all applicable major modes by default.
241 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
244 *** The D-Bus object manager interface is implemented.
247 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
248 if their value does not fit into Emacs's integer range.
251 *** The function `dbus-call-method' works non-blocking now, it can be
252 interrupted by C-g. `dbus-call-method-non-blocking' is obsolete.
255 *** Signals can be sent also as unicast message.
258 *** The argument list of `dbus-register-signal' has been extended,
259 according to the new match rule types of D-Bus. See the manual for
263 *** `dbus-init-bus' supports private connections.
266 *** There is a new function `dbus-setenv'.
269 ** notifications.el supports now version 1.2 of the Notifications API.
270 The function `notifications-get-capabilities' returns the supported
273 ** Tabulated List and packages derived from it
275 *** New command `tabulated-list-sort', bound to `S', sorts the column
276 at point, or the Nth column if a numeric prefix argument is given.
280 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
281 Previously, this slot stored semicolon-separated attribute-value pairs
282 appended to some imap URLs, but this is not compatible with RFC 3986.
283 So now the `filename' slot stores the entire path and query components
284 and the `attributes' slot is always nil.
286 *** New function `url-encode-url' for encoding a URI string.
287 The `url-retrieve' function now uses this to encode its URL argument,
288 in case that is not properly encoded.
290 ** Obsolete packages:
293 In most cases, assoc+member+push+delq work just as well.
294 And in any case it's just a terrible package: ugly semantics, terrible
295 inefficiency, and not namespace-clean.
308 * New Modes and Packages in Emacs 24.2
310 * Incompatible Lisp Changes in Emacs 24.2
313 ** Docstrings starting with `*' no longer indicate user options.
314 Only variables defined using `defcustom' are considered user options.
315 The function `user-variable-p' is now an obsolete alias for
318 ** `face-spec-set' no longer sets frame-specific attributes when the
319 third argument is a frame (that usage was obsolete since Emacs 22.2).
322 ** The arguments of `dbus-register-signal' are no longer just strings,
323 but keywords or keyword-string pairs. The old argument list will
324 still be supported for Emacs 24.x.
326 ** The following obsolete variables and varaliases have been removed:
328 *** `facemenu-unlisted-faces'
329 *** `rmail-decode-mime-charset'
332 * Lisp changes in Emacs 24.2
334 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
335 The interpretation of the DECLS is determined by `defun-declarations-alist'.
337 ** `macro-declaration-function' is obsolete, use `macro-declarations-alist'.
339 ** New function `set-temporary-overlay-map'.
341 ** New macros `setq-local' and `defvar-local'.
343 ** New error type and new function `user-error'. Doesn't trigger the debugger.
345 ** The functions get-lru-window, get-mru-window and get-largest-window
346 now accept a third argument to avoid chosing the selected window.
350 *** New function `completion-table-with-quoting' to handle completion
351 in the presence of quoting, such as file completion in shell buffers.
353 *** New function `completion-table-subvert' to use an existing completion
354 table, but with a different prefix.
358 *** `current-time-string' no longer requires that its argument's year
359 must be in the range 1000..9999. It now works with any year supported
360 by the underlying C implementation.
362 ** `automount-dir-prefix' is obsolete.
363 ** `buffer-has-markers-at' is obsolete.
365 * Changes in Emacs 24.2 on non-free operating systems
367 ** New configure.bat options on MS-Windows:
369 *** --without-libxml2 omits support for libxml2, even if its presence
372 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
373 Emacs now supports mouse highlight, help-echo (in the echo area), and
374 mouse-autoselect-window.
377 * Installation Changes in Emacs 24.1
379 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
380 to configure. Note that other libraries used by Emacs, RSVG and GConf,
381 also depend on Gtk+. You can disable them with --without-rsvg and
384 ** Emacs can be compiled with GnuTLS support.
385 This happens by default if a suitably recent version of the library is
386 found at build time. To prevent this, use the configure option
387 `--without-gnutls'. See below for GnuTLS features.
389 ** Emacs can be compiled with SELinux support.
390 This happens by default if a suitably recent version of the library is
391 found at build time. To prevent this, use the configure option
392 `--without-selinux'. See below for SELinux features.
394 ** Emacs can be compiled with ImageMagick support.
395 This happens by default if a suitably recent version of the library is
396 found at build time. To prevent this, use the configure option
397 `--without-imagemagick'. See below for ImageMagick features.
398 This feature is not available for the Nextstep or MS ports.
400 ** Emacs can be compiled with libxml2 support.
401 This happens by default if a suitably recent version of the library is
402 found at build time. To prevent this, use the configure option
403 `--without-xml2'. See below for libxml2 features.
405 ** By default, the installed Info and man pages are compressed.
406 You can disable this by configuring --without-compress-info.
408 ** New configure option --with-wide-int.
409 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
410 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
413 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
414 These provide no new functionality, they just remove the need to edit
415 lib-src/Makefile by hand in order to use the associated features.
417 ** New configure option --enable-use-lisp-union-type.
418 This is only useful for Emacs developers to debug certain types of bugs.
419 This is not a new feature; only the configure flag is new.
421 ** The standalone programs digest-doc and sorted-doc are removed.
422 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
424 ** The standalone program `fakemail' is removed.
425 If you need it, feedmail.el provides a superset of the functionality.
428 * Startup Changes in Emacs 24.1
430 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
431 command line arguments, and the EMACS_UNIBYTE environment variable, no
432 longer have any effect. (They were declared obsolete in Emacs 23.)
434 ** New command line option `--no-site-lisp' removes site-lisp directories
435 from load-path. -Q now implies this. This option does not affect the
436 EMACSLOADPATH environment variable (and hence has no effect for
440 * Changes in Emacs 24.1
444 *** Many packages now use the `completion-at-point' command,
445 rather than implementing separate completion commands.
447 *** `completion-at-point' now handles tags and semantic completion.
449 *** Completion in a non-minibuffer now tries to detect the end of completion
450 and pops down the *Completions* buffer accordingly.
452 *** New option `completion-cycle-threshold' allows completion cycling.
454 *** New option `completion-category-overrides' for overriding the
455 default completion style in certain circumstances.
457 *** New completion style `substring'.
459 *** Completion of buffer names uses `substring' completion by default.
461 *** The option `widget-complete-field' has been removed.
465 *** The first time you try sending mail, Emacs asks for a mail method.
466 This is implemented by a new default for `send-mail-function', which
467 is `sendmail-query-once'. This offers to use the smtpmail package, or
468 to use the old defaults relying on external mail facilities
469 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
470 `mailclient-send-it' on Windows).
472 *** Typing C-c m in the buffer made by M-x report-emacs-bug transfers
473 the report to your desktop's preferred mail client, if there is one.
474 This uses either the "xdg-email" utility, or Mac OS's "open" command.
476 *** See Changes in Specialized Modes and Packages for SMTPmail changes
477 and Mail mode changes
479 ** Emacs server and client changes
481 *** New option `server-port' specifies the port for TCP Emacs servers.
483 *** New emacsclient argument -q/--quiet suppresses some status messages.
485 *** New emacsclient argument --frame-parameters specifies the frame
486 parameters of any newly-created graphical frame.
488 *** If emacsclient shuts down due to Emacs signaling an error,
489 its exit status is 1.
491 *** New emacsclient argument --parent-id ID.
492 This opens a client frame in parent X window ID, via XEmbed, similar
493 to the --parent-id argument to Emacs.
495 ** Internationalization changes
497 *** Emacs now supports display and editing of bidirectional text.
498 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
499 displayed in the correct visual order as expected by users of those
500 scripts. The display reordering is a "full bidirectionality" class
501 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
502 with no RTL text should look exactly the same as before.
504 **** New buffer-local variable `bidi-display-reordering'.
505 To disable display reordering in a buffer, change this to nil.
507 **** New buffer-local variable `bidi-paragraph-direction'.
508 If nil (the default), Emacs determines the base direction of each
509 paragraph from its text, as specified by the UBA. Setting the value
510 to `right-to-left' or `left-to-right' forces a base direction on each
513 Paragraphs with right-to-left base direction are displayed starting at
514 the right window edge.
516 *** Enhanced support for characters with no glyphs in available fonts,
517 or, on text terminals, characters that cannot be encoded by the
518 terminal coding system. The new option `glyphless-char-display-control'
519 specifies how to display them: as a hexadecimal code in a box, a thin
520 1-pixel space, an empty box, etc.
522 *** New input methods: farsi, farsi-translit, bulgarian-alt-phonetic.
524 *** `nobreak-char-display' now also highlights Unicode hyphen chars
527 *** New Hebrew translation of the Emacs Tutorial.
528 Type `C-u C-h t' to choose it in case your language setup doesn't
529 automatically select it.
531 ** An Emacs Lisp package manager is now included.
532 This is a convenient way to download and install additional packages,
533 from a package repository at http://elpa.gnu.org.
535 *** M-x list-packages shows a list of packages, which can be
536 selected for installation.
538 *** New command `describe-package', bound to `C-h P'.
540 *** By default, all installed packages are loaded automatically when
541 Emacs starts up. To disable this, set `package-enable-at-startup' to
542 nil. To specify the packages to load, customize `package-load-list'.
544 ** Custom theme changes
546 *** New command `M-x customize-themes', which provides a convenient
547 interface for enabling and disabling Custom themes.
549 *** New option `custom-theme-load-path' is the load path for themes.
550 Emacs no longer looks for Custom themes in `load-path'. The default
551 value of `custom-theme-load-path' says to look for themes in
552 `custom-theme-directory', followed by a subdirectory of
553 `data-directory' named "themes/", which contains a small selection of
554 built-in Custom themes.
556 *** New option `custom-safe-themes' records known-safe theme files.
557 If a theme is not in this list, Emacs queries before loading it, and
558 offers to save the theme to `custom-safe-themes' automatically. By
559 default, all themes included in Emacs are treated as safe.
561 ** Improved GTK integration
563 *** GTK scroll-bars are now placed on the right by default.
564 The function `set-scroll-bar-mode' can change this.
566 *** GTK tool bars can have just text, just images or images and text.
567 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
568 the default is taken from desktop settings.
570 *** GTK tool bars can be placed on any edge of the frame.
571 The frame-parameter tool-bar-position controls this. It takes the
572 values top, left, right or bottom. The Options => Show/Hide menu has
575 *** The default colors for selected text (the `region' face) are taken
576 from the GTK theme when Emacs is built with GTK.
578 *** Emacs uses GTK tooltips by default if built with GTK.
579 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
581 ** Graphical interface changes
583 *** On graphical displays, the mode-line no longer ends in dashes.
584 Also, the first dash (which does not indicate anything) is just
585 displayed as a space.
587 *** `menu-bar-select-buffer-function' lets you choose another operation
588 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
590 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
591 built with Xft. These fonts can be set via X resources, for example:
592 Emacs.pane.menubar.font: Courier-12
596 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
597 or if it receives a SIGINT signal in batch mode.
599 *** `kill-emacs-hook' is now also run in batch mode.
600 Third-party code which adds to `kill-emacs-hook' should check if they
601 do the right thing in batch mode.
605 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
606 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
607 of buffer at first key-press (instead they move to top/bottom of buffer)
608 when `scroll-error-top-bottom' is non-nil.
610 *** New option `scroll-error-top-bottom' (see above).
612 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
613 scroll a line instead of full screen.
615 *** New property `scroll-command' should be set on a command's symbol to
616 define it as a scroll command affected by `scroll-preserve-screen-position'.
618 *** If you customize `scroll-conservatively' to a value greater than 100,
619 Emacs will never recenter point in the window when it scrolls due to
620 cursor motion commands or commands that move point (e.f., `M-g M-g').
621 Previously, you needed to use `most-positive-fixnum' as the value of
622 `scroll-conservatively' to achieve the same effect.
624 *** "Aggressive" scrolling now honors the scroll margins.
625 If you customize `scroll-up-aggressively' or
626 `scroll-down-aggressively' and move point off the window, Emacs now
627 scrolls the window so as to avoid positioning point inside the scroll
630 ** Basic SELinux support has been added.
631 This requires Emacs to be linked with libselinux at build time.
633 *** Emacs preserves the SELinux file context when backing up.
634 Also, the function `copy-file' has an extra optional argument for
635 preserving SELinux context, and the return value of `backup-buffer'
636 now includes the SELinux context.
638 *** New functions `file-selinux-context' and `set-file-selinux-context'
639 get and set the SELinux context of a file.
643 *** `delete-by-moving-to-trash' now only affects commands that specify
644 trashing. This avoids inadvertently trashing temporary files.
646 *** Calling `delete-file' or `delete-directory' with a prefix argument
647 now forces true deletion, regardless of `delete-by-moving-to-trash'.
649 ** File- and directory-local variable changes
651 *** You can stop directory local vars from applying to subdirectories.
652 Add an element (subdirs . nil) to the alist portion of any variables
653 settings to indicate that the section should not apply to
656 *** Directory local variables can apply to some file-less buffers.
657 Affected modes include dired, vc-dir, and log-edit. For example,
658 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
659 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
660 `hack-dir-local-variables-non-file-buffer' to support this.
662 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
663 Instead, use "eval: (minor-mode 1)".
665 *** The variable `inhibit-first-line-modes-regexps' has been renamed
666 to `inhibit-local-variables-regexps'. As the name suggests, it now
667 applies to ALL file local variables, not just -*- lines. The
668 associated `inhibit-first-line-modes-suffixes' has been renamed in the
673 *** The `quit-window' command now restores the last buffer displayed
674 in the quitted window.
676 *** Resizing an Emacs frame now preserves proportional window sizes,
677 modulo restrictions like window minimum sizes and fixed-size windows.
679 *** The behavior of `display-buffer' is now customizable in detail.
681 **** New option `display-buffer-base-action' specifies a list of
682 user-determined display "actions" (functions and optional arguments
683 for choosing the displaying window).
685 This takes precedence over the default display action, which is
686 specified by `display-buffer-fallback-action'.
688 **** New option `display-buffer-alist' maps buffer name regexps to
689 display actions, taking precedence over `display-buffer-base-action'.
691 *** New option `window-combination-limit'.
692 The new option `window-combination-limit' allows to return the space
693 obtained for resizing or creating a window more reliably to the window
694 from which such space was obtained.
696 *** New option `window-combination-resize'.
697 The new option `window-combination-resize' allows to split a window that
698 otherwise cannot be split because it's too small by stealing space from
699 other windows in the same combination. Subsequent resizing or deletion
700 of the window will resize all windows in the same combination as well.
702 *** New option `frame-auto-hide-function' lets you choose between
703 iconifying or deleting a frame when burying a buffer in a dedicated
704 frame, or quitting a window showing a buffer in a frame of its own.
706 *** New commands `maximize-window' and `minimize-window'.
707 These maximize and minimize the size of a window within its frame.
709 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
710 These functions allow to navigate through the live buffers that have
711 been shown in a specific window.
713 ** Minibuffer changes
715 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
716 This is handy for minibuffer-only frames, and is also used for the feature
717 where mouse-1 pops up *Messages*"', which can now easily be changed.
719 *** Minibuffers set `truncate-lines' to nil.
720 If you want to change the value to something else, you could use
721 for example `minibuffer-setup-hook'.
723 ** `auto-mode-case-fold' is now enabled by default.
725 ** `backup-by-copying-when-mismatch' now defaults to t.
727 ** New basic faces `error', `warning', `success'.
728 These are used to highlight text indicating failure, caution or
729 successful operation.
731 ** New option `list-colors-sort' defines the color sort order
732 for `list-colors-display'.
734 ** The variable `focus-follows-mouse' now always defaults to nil.
737 * Editing Changes in Emacs 24.1
741 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
744 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
747 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
749 ** New commands `count-words-region' and `count-words'.
751 *** M-= is bound to `count-words-region', not `count-lines-region'.
752 The `count-words-region' command, when called interactively, reports
753 the number of lines, words, and characters in the region. It is a
754 superset of the old `count-lines-region', which is now an obsolete
757 ** The command `just-one-space' (M-SPC), if given a negative argument,
758 also deletes newlines around point.
762 *** New option `delete-active-region'.
763 If non-nil, [delete] and DEL delete the region if it is active and no
764 prefix argument is given. If set to `kill', those commands kill
767 *** New command `delete-forward-char', bound to [delete].
768 This is meant for interactive use, and obeys `delete-active-region'.
769 The command `delete-char' does not obey `delete-active-region'.
771 *** `delete-backward-char' is now a Lisp function.
772 Apart from obeying `delete-active-region', its behavior is unchanged.
773 However, the byte compiler now warns if it is called from Lisp; Lisp
774 callers should use delete-char with a negative argument instead.
776 *** The option `mouse-region-delete-keys' has been deleted.
778 ** Selection changes.
780 The default handling of clipboard and primary selections has been
781 changed to conform with modern X applications. In short, most
782 commands for killing and yanking text now use the clipboard, while
783 mouse commands use the primary selection.
785 In the following, we provide a list of these changes, followed by a
786 list of steps to get the old behavior back if you prefer that.
788 *** `select-active-regions' now defaults to t.
789 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
790 the kill ring. The selected text is put in the primary selection, if
791 the system possesses a separate primary selection facility (e.g. X).
793 **** `select-active-regions' also accepts a new value, `only'.
794 This means to only set the primary selection for temporarily active
795 regions (usually made by mouse-dragging or shift-selection);
796 "ordinary" active regions, such as those made with C-SPC followed by
797 point motion, do not alter the primary selection.
799 **** `mouse-drag-copy-region' now defaults to nil.
801 *** mouse-2 is now bound to `mouse-yank-primary'.
802 This pastes from the primary selection, ignoring the kill-ring.
803 Previously, mouse-2 was bound to `mouse-yank-at-click'.
805 *** `x-select-enable-clipboard' now defaults to t on all platforms.
807 *** `x-select-enable-primary' now defaults to nil.
808 Thus, commands that kill text or copy it to the kill-ring (such as
809 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
811 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
812 exactly equivalent to M-w, C-w, and C-y respectively.
814 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
815 non-nil by default, as Windows does not support the primary selection
816 between applications.
818 *** To return to the previous behavior, do the following:
820 **** Change `select-active-regions' to nil.
821 **** Change `mouse-drag-copy-region' to t.
822 **** Change `x-select-enable-primary' to t (on X only).
823 **** Change `x-select-enable-clipboard' to nil.
824 **** Bind `mouse-yank-at-click' to mouse-2.
826 *** Support for X cut buffers has been removed.
828 *** X clipboard managers are now supported.
829 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
831 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
832 in the current rectangle. With a prefix argument, this prompts for a
833 number to count from and for a format string.
835 ** `redisplay-dont-pause' now defaults to t.
836 This makes Emacs feel more responsive to editing commands that arrive
837 at high rate, e.g. if you lean on some key, because stopping redisplay
838 in the middle (when this variable is nil) forces more expensive
839 updates later on, and Emacs appears to be unable to keep up.
841 ** The behavior of <TAB> for active regions in Text mode has changed.
842 In Text and related modes, typing <TAB> (`indent-for-tab-command')
843 when the region is active causes Emacs to indent all the lines in the
844 region, aligning them with the line previous to the first line in the
845 region (or with the left margin if there is no previous line).
847 ** When `occur' is called with a prefix argument, matching strings are
848 collected into the `*Occur*' buffer without line numbers. If there
849 are parenthesized subexpressions in the specified regexp, `occur'
850 reads replacement text that may contain \\& and \\N whose convention
851 follows `replace-match'.
854 * Changes in Specialized Modes and Packages in Emacs 24.1
856 ** Archive Mode has basic support for browsing and updating 7z archives.
860 *** BibTeX mode now supports biblatex.
861 Use the variable `bibtex-dialect' to select different BibTeX dialects.
862 `bibtex-entry-field-alist' is now an obsolete alias for
863 `bibtex-BibTeX-entry-alist'.
865 *** New command `bibtex-search-entries', bound to C-c C-a.
867 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
869 *** New variable `bibtex-search-entry-globally'.
873 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
875 *** The default browser used by the package is now the "xdg-open" program,
876 on platforms that support it. This calls your desktop's preferred browser.
878 ** Calendar, Diary, and Appt
880 *** Diary entries can contain non-printing "comments".
881 See the variable `diary-comment-start'.
883 *** Appointments can specify their individual warning times.
884 See the variable `appt-warning-time-regexp'.
886 *** The function specified by `appt-disp-window-function' may be passed
887 lists of arguments if multiple appointments are due at similar times.
888 If you are using a custom function for this, you should update it.
890 *** New function `diary-hebrew-birthday'.
892 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
893 may no longer be nil, but must all be strings.
895 *** The obsolete (since Emacs 22.1) method of enabling the appt
896 package by adding `appt-make-list' to `diary-hook' has been removed.
897 Use `appt-activate' instead.
899 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
900 appt-issue-message (use the function appt-activate)
901 appt-visible/appt-msg-window (use the variable appt-display-format)
903 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
904 view-diary-entries, list-diary-entries, show-all-diary-entries
908 *** New feature to "guess" the style in an existing buffer.
909 The main entry point is M-x c-guess.
911 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
913 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
914 Thus C-M-a will, by default, go to the beginning of the immediate function,
917 *** "Macros with semicolons" can be registered for correct indentation.
918 Where such a macro ends a line (no semicolon) the next statement is no longer
919 parsed as a statement continuation.
921 ** Comint and modes derived from it use the standard completion code.
925 *** Compilation mode can be used without Font Lock mode.
926 `compilation-parse-errors-function' is now obsolete.
928 *** New variable `compilation-filter-start', which is bound while
929 `compilation-filter-hook' runs. It records the start position of the
930 text inserted by `compilation-filter'.
932 *** `compilation-error-screen-columns' and `compilation-first-column'
933 are obeyed in the editing buffer. So programming language modes can
934 set them, whereas previously only the value in the *Compilation*
939 *** Customize buffers now contain a search field.
940 The search is performed using `customize-apropos'.
941 To turn off the search field, set `custom-search-field' to nil.
943 *** Custom options now start out hidden if at their default values.
944 Use the arrow to the left of the option name to toggle visibility.
946 *** custom-buffer-sort-alphabetically now defaults to t.
948 *** The color widget now has a "Choose" button, which allows you to
949 choose a color via `list-colors-display'.
953 *** It is now possible to access buses other than the default system
956 *** The `dbus-register-method' and `dbus-register-property' functions
957 optionally do not register names.
959 *** The new function `dbus-register-service' registers a known service
960 name on a D-Bus without also registering a property or a method.
964 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
965 if called with a prefix argument, read a file name from the minibuffer
966 instead of using the current buffer.
968 *** The "dired local variables" feature of Dired-x is obsolete.
969 The standard directory local variables feature replaces it.
973 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
974 controlling attempts to autojoin a channel.
976 *** New variable `erc-coding-system-precedence': If we use `undecided'
977 as the server coding system, this variable will then be consulted.
978 The default is to decode strings that can be decoded as utf-8 as
979 utf-8, and do the normal `undecided' decoding for the rest.
983 *** The default value of `eshell-directory-name' has changed
984 to be an "eshell" directory in `user-emacs-directory'.
985 The old "~/.eshell/" directory is still used if it exists, though.
989 *** The M-x gdb command now uses the GDB Machine Interface protocol.
990 It now supports multithread non-stop debugging and simultaneous
991 debugging of several threads.
995 *** RET (`image-toggle-animation') toggles animation, if applicable.
996 Animation plays once, unless the option `image-animate-loop' is non-nil.
1000 *** New command M-x info-display-manual displays a named Info manual.
1001 If that manual is already visited in some Info buffer, it displays
1002 that buffer. (This is handy if you have many manuals in many *info*
1003 buffers, and don't remember the name of the buffer visiting the manual
1004 you want to consult.) Otherwise, it loads and displays the manual.
1006 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
1007 This is for compatibility with the stand-alone Info reader program,
1008 and also because `Info-edit' is a rarely used command that is disabled
1011 ** Mail mode changes (not Message mode)
1013 *** New command M-x mail-add-attachment for adding MIME attachments
1015 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
1016 (Its name is misleading, since it has nothing to do with MIME
1017 attachments.) The old name is now an obsolete alias to the new name.
1019 ** MH-E has been updated to MH-E version 8.3.1.
1020 See MH-E-NEWS for details.
1022 ** Modula-2 mode provides auto-indentation.
1024 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
1026 ** nXML mode no longer binds C-RET to `nxml-complete'.
1027 Completion is now performed via `completion-at-point', bound to C-M-i
1028 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
1029 default), this performs tag completion.
1031 ** Org mode has been updated to version 7.8.09.
1032 See ORG-NEWS for details.
1034 ** Prolog mode has been completely revamped, with lots of additional
1035 functionality such as more intelligent indentation, electricity,
1036 support for more variants, including Mercury, and a lot more.
1040 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
1041 in the Rmail incoming message.
1043 *** The variable `rmail-message-filter' no longer has any effect.
1044 This change was made in Emacs 23.1 but was not advertised at the time.
1045 Try using `rmail-show-message-hook' instead.
1049 *** M-x shell prompts for the shell path name if the default directory
1050 is a remote file name and neither the environment variable $ESHELL nor
1051 the variable `explicit-shell-file-name' is set.
1053 *** TAB is now bound to the standard `completion-at-point' command,
1054 which now implements the pcomplete rules for shell command completion.
1058 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
1059 if the mail server supports them. This uses either built-in GnuTLS
1060 support, or the starttls.el library. Customize `smtpmail-stream-type'
1063 *** The variable `smtpmail-auth-credentials' has been removed.
1064 By default, the information is now stored in the file ~/.authinfo.
1065 This was the default value of smtpmail-auth-credentials. If you had
1066 customized smtpmail-auth-credentials to a list of user names and
1067 passwords, those settings are not used. During your first connection
1068 to the smtp server, Emacs will prompt for the user name and password,
1069 and offer to save them to ~/.authinfo. Or you can manually copy the
1070 credentials to ~/.authinfo. For example, if you had
1072 (setq smtpmail-auth-credentials
1073 '(("mail.example.org" 25 "jim" "s!cret")))
1075 then the equivalent line in ~/.authinfo would be
1077 machine mail.example.org port 25 login jim password s!cret
1079 See the auth-source manual for more information, e.g. on encrypting
1080 the credentials file.
1082 *** The variable `smtpmail-starttls-credentials' has been removed.
1083 If you had that set, you need to put
1085 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
1087 in your ~/.authinfo file instead.
1091 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
1092 and `sql-oracle-scan-on'.
1094 *** New options controlling prompting for login parameters.
1095 Each supported product has a custom variable `sql-*-login-params',
1096 which is a list of the parameters to be prompted for before a
1097 connection is established.
1099 *** The command `sql-product-interactive' now takes a prefix argument,
1100 which causes it to prompt for an SQL product.
1102 *** Product-specific SQL interactive commands now take prefix arguments.
1103 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
1104 given a prefix argument, prompt for a name for the SQL interactive
1105 buffer. This reduces the need for calling `sql-rename-buffer'.
1107 *** SQL interactive modes suppress command continuation prompts, and
1108 replace tabs with spaces. The first change impacts multiple line SQL
1109 statements entered with C-j between each line, statements yanked into
1110 the buffer and statements sent with `sql-send-*' functions. The
1111 second prevents the MySQL and Postgres interpreters from listing
1112 object name completions when sent text via `sql-send-*' functions.
1114 *** New command `sql-connect' starts a predefined SQLi session,
1115 using the login parameters from `sql-connection-alist'.
1117 *** New "Save Connection" menu item in SQLi buffers.
1118 This gathers the login params specified for the SQLi session, if it
1119 was not started by a connection, and saves them as a new connection.
1121 *** New commands for listing database objects and details:
1122 sql-list-all and sql-list-table.
1124 *** An API for manipulating SQL product definitions has been added.
1128 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
1132 *** New inline access method "ksu" (kerberized su).
1134 *** The following access methods are discontinued: "ssh1_old",
1135 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
1137 *** The user option `remote-file-name-inhibit-cache' controls whether
1138 remote file attributes are cached for better performance.
1140 *** The option `ange-ftp-binary-file-name-regexp' has changed its
1141 default value to "".
1143 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
1144 for remote machines which support SELinux.
1146 ** New function `url-queue-retrieve', which behaves like url-retrieve,
1147 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
1148 the degree of parallelism.
1150 ** VC and related modes
1152 *** Support for pulling on distributed version control systems.
1153 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
1154 supported (currently with Bzr, Git, and Mercurial), to update the
1155 current branch and working tree. A prefix argument means to prompt
1156 the user for specifics, e.g. a pull location.
1158 *** `vc-update' is now an alias for `vc-pull'.
1160 *** Support for merging on distributed version control systems.
1161 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
1162 is supported (currently with Bzr, Git, and Mercurial), to merge
1163 changes from another branch into the current one. It prompts for
1164 specifics, e.g. a merge source.
1166 *** New option `vc-revert-show-diff' controls whether `vc-revert'
1167 shows a diff while querying the user. It defaults to t.
1169 *** Log entries in some Log View buffers can be toggled to display a
1170 longer description by typing RET (log-view-toggle-entry-display).
1171 This is currently supported for Bzr, Git, and Mercurial (to support
1172 another backend, define a `log-view-expanded-log-entry-function').
1173 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
1174 use this to display the full log entry for the revision at point.
1176 *** New command `vc-ediff' allows visual comparison of two revisions
1177 of a file similar to `vc-diff', but using ediff backend.
1179 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
1180 this was not advertised at the time.
1182 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
1183 Since Emacs 23, it has done the same thing as `toggle-read-only', but
1184 this was not advertised at the time.
1190 *** erc-hecomplete.el (use erc-pcomplete.el instead)
1192 *** partial-completion-mode (complete.el) is obsolete.
1193 You can get a comparable behavior with:
1194 (setq completion-styles '(partial-completion initials))
1195 (setq completion-pcm-complete-word-inserts-delimiters t)
1197 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
1199 *** pgg is obsolete (use EasyPG instead).
1201 *** sregex.el is obsolete, since rx.el is a strict superset.
1203 *** s-region.el and pc-select.el are obsolete.
1204 They are superseded by shift-select-mode, enabled by default since 23.1.
1206 *** vc-mcvs.el is obsolete (for lack of a maintainer).
1210 *** The Landmark game is now invoked with `landmark', not `lm'.
1211 Its functions and variables have been similarly renamed.
1213 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
1214 (This interfered with cua-mode.)
1216 *** f90.el has some support for Fortran 2008 syntax.
1218 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
1220 *** New command `nato-region' converts text to NATO phonetic alphabet.
1223 * New Modes and Packages in Emacs 24.1
1225 ** Occur Edit mode applies edits made in *Occur* buffers to the
1226 original buffers. It is bound to "e" in Occur mode.
1228 ** New global minor mode electric-pair-mode.
1229 When enabled, typing an open parenthesis automatically inserts the
1230 matching closing one.
1232 ** New global minor mode electric-indent-mode.
1233 When enabled, typing certain characters triggers reindentation.
1234 Major modes wishing to use this can set electric-indent-chars or
1235 electric-indent-functions.
1237 ** New global minor mode electric-layout-mode.
1238 When enabled, typing certain characters automatically inserts newlines.
1239 Major modes wishing to use this can set electric-layout-rules.
1241 ** tabulated-list.el provides a generic major mode for tabulated data,
1242 from which other modes can be derived.
1244 ** pcase.el provides the ML-style pattern matching macro `pcase'.
1246 ** secrets.el is an implementation of the Secret Service API, an
1247 interface to password managers like GNOME Keyring or KDE Wallet. The
1248 Secret Service API requires D-Bus for communication. The command
1249 `secrets-show-secrets' offers a buffer with a visualization of the
1252 ** notifications.el provides an implementation of the Desktop
1253 Notifications API. It requires D-Bus for communication.
1255 ** soap-client.el supports access to SOAP web services from Emacs.
1256 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
1258 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
1260 ** New emacs-lock.el package.
1261 The previous version has been moved to obsolete/old-emacs-lock.el.
1262 Now, there is a proper minor mode `emacs-lock-mode'. Protection
1263 against exiting Emacs and killing the buffer can be set separately.
1264 The mechanism for automatically turning off protection for buffers
1265 with dead inferior processes has been generalized.
1268 * Incompatible Lisp Changes in Emacs 24.1
1270 ** Passing a nil argument to a minor mode function call now ENABLES
1271 the minor mode unconditionally. This is so that you can write e.g.
1273 (add-hook 'text-mode-hook 'foo-mode)
1275 to enable foo-mode in Text mode buffers, removing the need for
1276 `turn-on-foo-mode' style functions. This affects all mode commands
1277 defined by `define-minor-mode'. If called interactively, the mode
1278 command still toggles the minor mode.
1280 ** The return value of `backup-buffer' has changed.
1281 It is now a list of three elements, where the second element is a list
1282 describing the original file's SELinux context. If Emacs or the
1283 system lacks SELinux support, the context list is (nil nil nil nil).
1284 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
1286 ** `char-direction-table' and the `char-direction' function were deleted.
1287 They were buggy and inferior to the new support of bidirectional
1288 editing introduced in Emacs 24. If you need the bidirectional
1289 properties of a character, use `get-char-code-property' with the last
1290 argument `bidi-class'.
1292 ** `copy-directory' now copies the source directory as a subdirectory
1293 of the target directory, if the latter is an existing directory. The
1294 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
1295 the contents directly into a pre-existing target directory.
1297 ** For mouse click input events in the text area, the Y pixel
1298 coordinate in the POSITION list now counts from the top of the text
1299 area, excluding any header line. Previously, it counted from the top
1302 ** Support for "old-style" backquotes, obsolete for 10+ years, has
1303 been further reduced. Now a backquote not followed by a space is
1304 always treated as a "new-style" backquote. Please remove all
1305 "old-style" backquotes from your code. If your code uses backquotes
1306 as documented in the Elisp manual, and compiles without warning, then
1307 you have nothing to do in this regard. Code not following the
1308 appropriate conventions may fail to compile.
1310 The most common cause of trouble seems to be an old-style backquote
1311 followed by a newline. Another cause of trouble is vector notation
1312 for key sequence notation: instead of [(control ,)] and [(control ')],
1313 you should write [(control ?,)] and [(control ?')], which will work in
1316 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
1317 was not advertised at the time. The function `custom-initialize-delay'
1318 replaced all known uses.
1320 ** `view-buffer' now treats special mode-class in the same way that
1321 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
1322 major mode is special).
1324 ** Menu and tool bar changes
1326 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
1327 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
1328 With these alist entries omitted, `make-frame' checks the value of the
1329 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
1330 a menu-bar or tool-bar, respectively. If the alist entries are added,
1331 they override the value of `menu-bar-mode'/`tool-bar-mode'.
1333 *** The menu bar bindings's caches are not used any more.
1334 Use (where-is-internal <def> nil t) instead.
1336 ** Regions created by mouse dragging are now normal active regions,
1337 similar to those created by shift-selection (see Selection changes
1338 above). In previous Emacs versions, these regions were delineated by
1339 `mouse-drag-overlay'; that variable has been removed.
1341 ** The fourth argument of `filter-buffer-substring' has been removed.
1342 If you want to remove text properties from the final result, simply
1343 pass the result through substring-no-properties.
1345 ** cl.el no longer provides `cl-19'.
1347 ** The following obsolete functions and aliases have been removed
1348 (the appropriate new function is given in parentheses; "not needed"
1349 means you can just remove all calls to the function in question):
1351 *** `comint-kill-output' (`comint-delete-output')
1352 *** `decompose-composite-char' (`char-to-string')
1353 *** `outline-visible' (`outline-invisible-p')
1354 *** `internal-find-face' (`facep')
1355 *** `internal-get-face' (`facep and check-face')
1356 *** `frame-update-faces' (not needed)
1357 *** `frame-update-face-colors' (`frame-set-background-mode')
1358 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
1359 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
1360 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
1361 *** `x-make-font-bold-italic' (`make-face-bold-italic')
1362 *** `x-make-font-unbold' (`make-face-unbold')
1363 *** `x-make-font-unitalic' (`make-face-unitalic')
1364 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
1365 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
1366 *** `iswitchb-default-keybindings' (`iswitchb-mode')
1367 *** `char-bytes' (== 1)
1368 *** `isearch-return-char' (`isearch-printing-char')
1369 *** `make-local-hook' (not needed)
1370 *** `set-screen-height' (`set-frame-height')
1371 *** `set-screen-width' (`set-frame-width')
1373 ** The following obsolete variables and varaliases have been removed
1374 (the appropriate new variable is given in parentheses):
1376 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
1377 *** `vc-header-alist' (`vc-BACKEND-header')
1378 *** `directory-sep-char' (== ?/)
1379 *** `font-lock-defaults-alist' (`font-lock-defaults')
1380 *** `e' (`float-e').
1382 ** The following obsolete files were removed:
1383 sc.el, x-menu.el, rnews.el, rnewspost.el
1385 ** The format of the finder-inf.el file has changed, since the Finder
1386 mechanism is now based on the package system. The variable
1387 `finder-package-info' is replaced by `package--builtins' and
1388 `finder-keywords-hash'.
1390 ** When generating autoloads, `update-directory-autoloads' no longer
1391 assumes every inspected file is in your `load-path'. It instead
1392 generates relative names according to the current `load-path'.
1395 * Lisp changes in Emacs 24.1
1397 ** Code can now use lexical scoping by default instead of dynamic scoping.
1398 The `lexical-binding' variable enables lexical scoping for local
1399 variables. It is typically set via a file-local variable in the first
1400 line of the file, in which case it applies to all the code in that
1403 *** `eval' takes a new optional argument `lexical' to choose the new lexical
1404 binding instead of the old dynamic binding mode.
1406 *** Lexically scoped interpreted functions are represented with a new form
1407 of function value which looks like (closure ENV ARGS &rest BODY).
1409 *** New macro `letrec' to define recursive local functions.
1411 *** `defvar' and `defconst' now mark the variable as special (dynamic).
1412 So do `defcustom' and other forms that call `defvar' as a subroutine.
1414 *** New function `special-variable-p' to check whether a variable is
1415 declared as dynamically bound.
1417 *** The form ((lambda ...) ...) is deprecated.
1419 ** An Emacs Lisp testing tool is now included.
1420 Emacs Lisp developers can use this tool to write automated tests for
1421 their code. See the ERT info manual for details.
1423 ** Changes for bidirectional display and editing
1425 *** New function `current-bidi-paragraph-direction'.
1426 This returns the base direction of the paragraph at point.
1428 *** New function `bidi-string-mark-left-to-right'.
1429 Given a string containing characters from right-to-left scripts, this
1430 function returns another string which can be safely inserted into a
1431 buffer, such that any following text will be always displayed to the
1432 right of that string. (This works by appending an invisible Unicode
1433 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
1435 This is useful when the buffer has overall left-to-right paragraph
1436 direction and you need to insert a string whose contents are not known
1437 in advance, without disrupting the layout of the line.
1441 *** Window tree functions are accessible in Elisp.
1442 Functions are provided to return the parent, siblings or child windows
1443 of any window including internal windows (windows not associated with a
1444 buffer) in the window tree.
1446 **** New function `window-valid-p' gives non-nil for live and internal
1449 **** Window manipulation can deal with internal windows.
1450 Many window handling functions like `split-window', `delete-window', or
1451 `delete-other-windows' as well as the window resizing functions can now
1452 act on any window including internal ones.
1454 *** window-total-height/-width vs window-body-height/-width.
1455 The function `window-height' has been renamed to `window-total-height'
1456 and `window-width' has been renamed to `window-body-width'. The old
1457 names are provided as aliases. Two new functions `window-total-width'
1458 and `window-body-height' are provided.
1460 *** Window parameters specific to window handling functions.
1461 For each window you can specify a parameter to override the default
1462 behavior of a number of functions like `split-window', `delete-window'
1463 and `delete-other-windows'. The variable `ignore-window-parameters'
1464 allows to ignore processing such parameters.
1466 *** New semantics of third argument of `split-window'.
1467 The third argument of `split-window' has been renamed to SIDE and can be
1468 set to any of the values 'below, 'right, 'above, or 'left to make the
1469 new window appear on the corresponding side of the window that shall be
1470 split. Any other value of SIDE will cause `split-window' to split the
1471 window into two side-by-side windows as before.
1473 *** Window resizing functions.
1474 A new standard function for resizing windows called `window-resize' has
1475 been introduced. This and all other functions for resizing windows no
1476 longer delete any windows when they become too small.
1478 *** Deleting the selected window now selects the most recently selected
1479 live window on that frame instead.
1481 *** `adjust-window-trailing-edge' adjustments.
1482 `adjust-window-trailing-edge' can now deal with fixed-size windows and
1483 is able to resize other windows if a window adjacent to the trailing
1484 edge cannot be shrunk any more. This makes its behavior more similar to
1485 that of Emacs 21 without compromising, however, its inability to delete
1486 windows which was introduced in Emacs 22.
1488 *** Window-local buffer lists.
1489 Windows now have local buffer lists. This means that removing a buffer
1490 from display in a window will preferably show the buffer previously
1491 shown in that window with its previous window-start and window-point
1492 positions. This also means that the same buffer may be automatically
1493 shown twice even if it already appears in another window.
1495 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
1496 which if non-nil requires the buffer to be displayed in the currently
1497 selected window, signaling an error otherwise. If nil, another window
1498 can be used, e.g. if the selected one is strongly dedicated.
1500 *** `split-window-vertically' and `split-window-horizontally' renamed
1501 to `split-window-below' and `split-window-right' respectively.
1502 The old names are kept as aliases.
1506 **** The second arg to `display-buffer' and `pop-to-buffer' is now
1507 named ACTION, and takes a display action of the same form as
1508 `display-buffer-base-action' (see Changes, above). A non-nil,
1509 non-list value is treated specially, as the old meaning.
1511 **** New variable `display-buffer-overriding-action'.
1513 **** The procedure of `display-buffer' etc. to choose a window is
1514 determined by combining `display-buffer-overriding-action',
1515 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
1516 and `display-buffer-fallback-action'. The second and fourth of these
1517 are user-customizable variables.
1519 See the docstring of `display-buffer' for details.
1521 *** New functions `window-state-get' and `window-state-put'.
1522 These functions allow to save and restore the state of an arbitrary
1523 frame or window as an Elisp object.
1527 *** New variable `completion-extra-properties' used to specify extra
1528 properties of the current completion:
1529 - :annotate-function, same as the old completion-annotate-function.
1530 - :exit-function, function to call after completion took place.
1532 *** Functions on `completion-at-point-functions' can return any of the
1533 properties valid for `completion-extra-properties'.
1535 *** `completion-annotate-function' is obsolete.
1537 *** New `metadata' method for completion tables. The metadata thus returned
1538 can specify various details of the data returned by `all-completions':
1539 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
1540 used to select a style in completion-category-overrides.
1541 - `annotation-function' to add annotations in *Completions*.
1542 - `display-sort-function' to specify how to sort entries in *Completions*.
1543 - `cycle-sort-function' to specify how to sort entries when cycling.
1545 *** `minibuffer-local-filename-must-match-map' is not used any more.
1546 Instead, the bindings in `minibuffer-local-filename-completion-map'
1547 are combined with `minibuffer-local-must-match-map'.
1549 *** New variable `completing-read-function' allows overriding the
1550 behavior of `completing-read'.
1552 ** `glyphless-char-display' can now distinguish between graphical and
1553 text terminal display, via a char-table entry that is a cons cell.
1555 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
1556 Instead, the offending function is removed.
1560 *** New function `run-hook-wrapped' for running an abnormal hook by
1561 passing the hook functions as arguments to a "wrapping" function.
1562 Like `run-hook-with-args-until-success', it stops at the first
1563 non-nil return value.
1565 *** New macro `with-wrapper-hook' for running an abnormal hook as a
1566 set of "wrapping" filters, similar to around advice.
1567 (A version of this macro was actually added in Emacs 23.2 but was not
1568 advertised at the time.)
1572 *** New macro `condition-case-unless-debug' (this was actually added in
1573 Emacs 23.1 as condition-case-no-debug, but not advertised)
1575 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
1577 *** Variable `stack-trace-on-error' removed.
1579 *** The debugger can now "continue" from an error, which means it will
1580 jump to the error handler as if the debugger had not been invoked
1581 instead of jumping all the way to the top-level.
1583 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
1584 This can be useful when `inhibit-quit' is set.
1586 ** The new function `server-eval-at' allows evaluation of Lisp forms on
1587 named Emacs server instances.
1589 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
1590 to redirect STDOUT to a file.
1592 ** The function `format-time-string' now supports the %N directive,
1593 for higher-resolution time stamps.
1595 ** New input reading functions
1597 *** New function `read-char-choice' reads a restricted set of
1598 characters, discarding any inputs not inside the set.
1600 *** The command `read-color' now requires a match for a color name
1601 or RGB triplet, instead of signaling an error if the user provides
1604 **** `facemenu-read-color' is now an alias for `read-color'.
1606 ** `image-library-alist' is renamed to `dynamic-library-alist'.
1607 The variable is now used to load all kind of supported dynamic libraries,
1608 not just image libraries. The previous name is still available as an
1611 ** Syntax parsing changes
1613 *** New variable `syntax-propertize-function'.
1614 This replaces `font-lock-syntactic-keywords' which is now obsolete.
1615 This allows syntax-table properties to be set independently from font-lock:
1616 just call syntax-propertize to make sure the text is propertized.
1617 Together with this new variable come a new hook
1618 syntax-propertize-extend-region-functions, as well as two helper functions:
1619 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
1620 as-is; and syntax-propertize-rules which provides a new way to specify
1623 *** Syntax tables support a new "comment style c" additionally to style b.
1625 ** New hook `post-self-insert-hook', run after `self-insert-command'.
1627 ** frame-local variables cannot be let-bound any more.
1629 ** Major and minor mode changes
1631 *** `set-auto-mode' now respects mode: local variables at the end of files,
1632 as well as those in the -*- line.
1634 *** `prog-mode' is a new major mode from which programming modes
1637 **** `prog-mode-hook' can be used to enable features for programming
1638 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
1639 on-the-fly spell checking for comments and strings.
1641 *** New hook `change-major-mode-after-body-hook', run by
1642 `run-mode-hooks' just before any other mode hooks.
1644 *** Enabled globalized minor modes can be disabled in specific major modes.
1645 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
1646 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
1648 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
1650 ** File-handling changes
1652 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
1653 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
1654 both non-nil. Interactively, TRASH defaults to t, unless a prefix
1655 argument is supplied (see Trash changes, above).
1657 *** New file predicates: `file-equal-p', `file-in-directory-p'.
1659 ** Tool-bars can display separators.
1660 Tool-bar separators are handled like menu separators in menu-bar maps,
1661 i.e. via menu entries of the form `(menu-item "--")'.
1665 *** Animated images support (currently animated gifs only).
1667 **** `image-animated-p' returns non-nil if an image can be animated.
1669 **** `image-animate' animates a supplied image spec.
1671 **** `image-animate-timer' returns the timer object for an image that
1674 *** `image-extension-data' has been renamed to `image-metadata'.
1675 The old name is an obsolete alias to the new one.
1677 *** Image mode can view any image type that ImageMagick supports.
1678 This requires Emacs to be built with ImageMagick support.
1680 **** New function `imagemagick-types', defined if ImageMagick support
1681 is enabled, returns a list of image file extensions that your
1682 ImageMagick installation supports.
1684 **** New function `imagemagick-register-types' enables ImageMagick
1685 image types in Image mode and in `create-image' and other helper
1688 **** New option `imagemagick-types-inhibit' excludes certain
1689 ImageMagick image types from `imagemagick-register-types'.
1691 **** With ImageMagick support, there are extra Image mode commands to
1692 resize and rotate images: `image-transform-fit-to-height',
1693 `image-transform-fit-to-width', `image-transform-set-rotation', and
1694 `image-transform-set-scale'.
1696 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
1697 passes it to the mail user agent function. This argument specifies an
1698 action for returning to the caller after finishing with the mail. For
1699 example, this is used by Rmail to optionally delete a mail window.
1701 ** XML and HTML parsing
1702 If Emacs is compiled with libxml2 support, there are two new
1703 functions: `libxml-parse-html-region' (which parses "real world" HTML)
1704 and `libxml-parse-xml-region' (which parses XML). Both return an
1705 Emacs Lisp parse tree.
1707 ** Networking and encryption changes
1709 *** `open-network-stream' can now be used to open an encrypted stream.
1710 It now accepts an optional `:type' parameter for initiating a TLS
1711 connection, directly or via STARTTLS. To do STARTTLS, additional
1712 parameters (`:end-of-command', `:success', `:capabilities-command')
1713 must also be supplied.
1715 *** New library gnutls.el.
1716 The new function `gnutls-available-p' returns non-nil if Emacs is
1717 built with GnuTLS support. The main entry points are
1718 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
1719 these functions through `open-network-stream', because that can
1720 upgrade connections through STARTTLS opportunistically or use plain
1721 SSL, depending on your needs. For debugging, set `gnutls-log-level'
1724 *** New primitive `secure-hash' that supports many secure hash algorithms:
1725 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
1726 sha1.el has been removed. The `sha1' feature is provided by default.
1730 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
1732 ** Progress reporters can now "spin".
1733 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
1734 now be nil, or omitted. This makes a "non-numeric" reporter. Each
1735 time you call `progress-reporter-update' on that progress reporter,
1736 with a nil or omitted VALUE argument, the reporter message is
1737 displayed with a "spinning bar".
1739 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
1740 being reverted, even if the buffer has a local `revert-buffer-function'.
1742 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
1743 If delayed-warnings-list is non-nil, the command loop calls
1744 `delayed-warnings-hook' after `post-command-hook'. At present, this
1745 is only used by Emacs on some platforms to display warnings during
1746 startup, which might otherwise not be noticed. This uses the
1747 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
1749 ** rx.el has a new `group-n' construct for explicitly numbered groups.
1751 ** New function `make-composed-keymap' that constructs a new keymap
1752 from multiple input maps. You can use this to make a keymap that
1753 inherits from multiple maps, eg:
1754 (set-keymap-parent newmap (make-composed-keymap othermap parent))
1756 ** New function `string-prefix-p'.
1757 (This was actually added in Emacs 23.2 but was not advertised at the time.)
1759 ** New reader macro ## that stands for the empty symbol.
1760 This means that the empty symbol can now be read back. Also, #: by itself
1761 (when not immediately followed by a possible symbol character) stands for
1762 an empty uninterned symbol.
1764 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
1766 ** The following functions and variables are obsolete:
1768 *** `tooltip-use-echo-area' is obsolete.
1769 Rather than setting this to t, disable Tooltip mode instead.
1771 *** buffer-substring-filters is obsolete.
1772 Use `filter-buffer-substring-functions' instead.
1774 *** `byte-compile-disable-print-circle' is obsolete.
1776 *** `deferred-action-list' and `deferred-action-function' are obsolete.
1777 Use `post-command-hook' instead.
1779 *** `font-lock-maximum-size' is obsolete.
1782 * Changes in Emacs 24.1 on non-free operating systems
1784 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
1785 and also when HOME is set to C:\ by default.
1787 ** New configure.bat options
1789 *** --enable-checking builds Emacs with extra runtime checks.
1791 *** --distfiles specifies files to be included in binary distribution.
1793 *** --without-gnutls disables automatic GnuTLS detection.
1795 *** --lib for general library linkage, works with the USER_LIBS build variable.
1797 ** New make target `dist' to create binary distribution for MS Windows.
1799 ** The Lisp function `w32-default-color-map' is now obsolete.
1800 (It is only used internally in the Emacs C code.)
1802 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
1803 reappear on mouse-over. (Requires OS X 10.6 or later.)
1805 ** On Mac OS X, dragging a file into Emacs visits the file, like on
1806 other platforms, rather than inserting its contents into the buffer.
1809 ----------------------------------------------------------------------
1810 This file is part of GNU Emacs.
1812 GNU Emacs is free software: you can redistribute it and/or modify
1813 it under the terms of the GNU General Public License as published by
1814 the Free Software Foundation, either version 3 of the License, or
1815 (at your option) any later version.
1817 GNU Emacs is distributed in the hope that it will be useful,
1818 but WITHOUT ANY WARRANTY; without even the implied warranty of
1819 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1820 GNU General Public License for more details.
1822 You should have received a copy of the GNU General Public License
1823 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
1828 paragraph-separate: "[
\f]*$"