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 * Startup Changes in Emacs 24.2
28 ** Emacs no longer searches for `leim-list.el' files beneath the standard
29 lisp/ directory. There should not be any there anyway. If you have
30 been adding them there, put them somewhere else, eg site-lisp.
33 * Changes in Emacs 24.2
35 ** New functions `system-users', `system-groups' return lists of the user
36 name, group names known to the system (where possible).
38 ** If your Emacs was built from a bzr checkout, the new variable
39 `emacs-bzr-version' contains information about which bzr revision was used.
41 ** ImageMagick support, if available, is automatically enabled.
42 It is no longer necessary to call `imagemagick-register-types'
43 explicitly to install ImageMagick image types; that function is called
44 automatically when setting `imagemagick-types-inhibit'.
46 *** Setting `imagemagick-types-inhibit' to t now disables the use of
47 ImageMagick to view images, set
50 * Editing Changes in Emacs 24.2
52 ** M-x move-to-column, if called interactively with no prefix arg, now
53 prompts for a column number.
55 ** `mouse-avoidance-banish-position' can now be used to customize
56 `mouse-avoidance-mode' further.
58 ** `C-M-f' and `C-M-b' will now move to the path name separator
59 character when doing minibuffer filename prompts.
61 ** `goto-char' is now bound to `M-g c'.
64 * Changes in Specialized Modes and Packages in Emacs 24.2
66 ** which-function-mode now applies to all applicable major modes by default.
68 ** erc will look up server/channel names via auth-source and use the
69 channel keys found, if any.
71 ** The `server-auth-key' variable can be used to set a permanent
72 shared key for Emacs Server.
74 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
75 closing brackets to be aligned with the line of the opening bracket.
77 ** FIXME something happened to ses.el, 2012-04-17.
86 * New Modes and Packages in Emacs 24.2
88 * Incompatible Lisp Changes in Emacs 24.2
91 ** Docstrings starting with `*' no longer indicate user options.
92 Only variables defined using `defcustom' are considered user options.
93 The function `user-variable-p' is now an obsolete alias for
97 * Lisp changes in Emacs 24.2
99 * Changes in Emacs 24.2 on non-free operating systems
101 ** New configure.bat options on MS-Windows:
103 *** --without-libxml2 omits support for libxml2, even if its presence
107 * Installation Changes in Emacs 24.1
109 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
110 to configure. Note that other libraries used by Emacs, RSVG and GConf,
111 also depend on Gtk+. You can disable them with --without-rsvg and
114 ** Emacs can be compiled with GnuTLS support.
115 This happens by default if a suitably recent version of the library is
116 found at build time. To prevent this, use the configure option
117 `--without-gnutls'. See below for GnuTLS features.
119 ** Emacs can be compiled with SELinux support.
120 This happens by default if a suitably recent version of the library is
121 found at build time. To prevent this, use the configure option
122 `--without-selinux'. See below for SELinux features.
124 ** Emacs can be compiled with ImageMagick support.
125 This happens by default if a suitably recent version of the library is
126 found at build time. To prevent this, use the configure option
127 `--without-imagemagick'. See below for ImageMagick features.
128 This feature is not available for the Nextstep or MS ports.
130 ** Emacs can be compiled with libxml2 support.
131 This happens by default if a suitably recent version of the library is
132 found at build time. To prevent this, use the configure option
133 `--without-xml2'. See below for libxml2 features.
135 ** By default, the installed Info and man pages are compressed.
136 You can disable this by configuring --without-compress-info.
138 ** New configure option --with-wide-int.
139 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
140 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
143 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
144 These provide no new functionality, they just remove the need to edit
145 lib-src/Makefile by hand in order to use the associated features.
147 ** New configure option --enable-use-lisp-union-type.
148 This is only useful for Emacs developers to debug certain types of bugs.
149 This is not a new feature; only the configure flag is new.
151 ** The standalone programs digest-doc and sorted-doc are removed.
152 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
154 ** The standalone program `fakemail' is removed.
155 If you need it, feedmail.el provides a superset of the functionality.
158 * Startup Changes in Emacs 24.1
160 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
161 command line arguments, and the EMACS_UNIBYTE environment variable, no
162 longer have any effect. (They were declared obsolete in Emacs 23.)
164 ** New command line option `--no-site-lisp' removes site-lisp directories
165 from load-path. -Q now implies this. This option does not affect the
166 EMACSLOADPATH environment variable (and hence has no effect for
170 * Changes in Emacs 24.1
174 *** Many packages now use the `completion-at-point' command,
175 rather than implementing separate completion commands.
177 *** `completion-at-point' now handles tags and semantic completion.
179 *** Completion in a non-minibuffer now tries to detect the end of completion
180 and pops down the *Completions* buffer accordingly.
182 *** New option `completion-cycle-threshold' allows completion cycling.
184 *** New option `completion-category-overrides' for overriding the
185 default completion style in certain circumstances.
187 *** New completion style `substring'.
189 *** Completion of buffer names uses `substring' completion by default.
191 *** The option `widget-complete-field' has been removed.
195 *** The first time you try sending mail, Emacs asks for a mail method.
196 This is implemented by a new default for `send-mail-function', which
197 is `sendmail-query-once'. This offers to use the smtpmail package, or
198 to use the old defaults relying on external mail facilities
199 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
200 `mailclient-send-it' on Windows).
202 *** Typing C-c m in the buffer made by M-x report-emacs-bug transfers
203 the report to your desktop's preferred mail client, if there is one.
204 This uses either the "xdg-email" utility, or Mac OS's "open" command.
206 *** See Changes in Specialized Modes and Packages for SMTPmail changes
207 and Mail mode changes
209 ** Emacs server and client changes
211 *** New option `server-port' specifies the port for TCP Emacs servers.
213 *** New emacsclient argument -q/--quiet suppresses some status messages.
215 *** New emacsclient argument --frame-parameters specifies the frame
216 parameters of any newly-created graphical frame.
218 *** If emacsclient shuts down due to Emacs signaling an error,
219 its exit status is 1.
221 *** New emacsclient argument --parent-id ID.
222 This opens a client frame in parent X window ID, via XEmbed, similar
223 to the --parent-id argument to Emacs.
225 ** Internationalization changes
227 *** Emacs now supports display and editing of bidirectional text.
228 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
229 displayed in the correct visual order as expected by users of those
230 scripts. The display reordering is a "full bidirectionality" class
231 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
232 with no RTL text should look exactly the same as before.
234 **** New buffer-local variable `bidi-display-reordering'.
235 To disable display reordering in a buffer, change this to nil.
237 **** New buffer-local variable `bidi-paragraph-direction'.
238 If nil (the default), Emacs determines the base direction of each
239 paragraph from its text, as specified by the UBA. Setting the value
240 to `right-to-left' or `left-to-right' forces a base direction on each
243 Paragraphs with right-to-left base direction are displayed starting at
244 the right window edge.
246 *** Enhanced support for characters with no glyphs in available fonts,
247 or, on text terminals, characters that cannot be encoded by the
248 terminal coding system. The new option `glyphless-char-display-control'
249 specifies how to display them: as a hexadecimal code in a box, a thin
250 1-pixel space, an empty box, etc.
252 *** New input methods: farsi, farsi-translit, bulgarian-alt-phonetic.
254 *** `nobreak-char-display' now also highlights Unicode hyphen chars
257 *** New Hebrew translation of the Emacs Tutorial.
258 Type `C-u C-h t' to choose it in case your language setup doesn't
259 automatically select it.
261 ** An Emacs Lisp package manager is now included.
262 This is a convenient way to download and install additional packages,
263 from a package repository at http://elpa.gnu.org.
265 *** M-x list-packages shows a list of packages, which can be
266 selected for installation.
268 *** New command `describe-package', bound to `C-h P'.
270 *** By default, all installed packages are loaded automatically when
271 Emacs starts up. To disable this, set `package-enable-at-startup' to
272 nil. To specify the packages to load, customize `package-load-list'.
274 ** Custom theme changes
276 *** New command `M-x customize-themes', which provides a convenient
277 interface for enabling and disabling Custom themes.
279 *** New option `custom-theme-load-path' is the load path for themes.
280 Emacs no longer looks for Custom themes in `load-path'. The default
281 value of `custom-theme-load-path' says to look for themes in
282 `custom-theme-directory', followed by a subdirectory of
283 `data-directory' named "themes/", which contains a small selection of
284 built-in Custom themes.
286 *** New option `custom-safe-themes' records known-safe theme files.
287 If a theme is not in this list, Emacs queries before loading it, and
288 offers to save the theme to `custom-safe-themes' automatically. By
289 default, all themes included in Emacs are treated as safe.
291 ** Improved GTK integration
293 *** GTK scroll-bars are now placed on the right by default.
294 The function `set-scroll-bar-mode' can change this.
296 *** GTK tool bars can have just text, just images or images and text.
297 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
298 the default is taken from desktop settings.
300 *** GTK tool bars can be placed on any edge of the frame.
301 The frame-parameter tool-bar-position controls this. It takes the
302 values top, left, right or bottom. The Options => Show/Hide menu has
305 *** The default colors for selected text (the `region' face) are taken
306 from the GTK theme when Emacs is built with GTK.
308 *** Emacs uses GTK tooltips by default if built with GTK.
309 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
311 ** Graphical interface changes
313 *** On graphical displays, the mode-line no longer ends in dashes.
314 Also, the first dash (which does not indicate anything) is just
315 displayed as a space.
317 *** `menu-bar-select-buffer-function' lets you choose another operation
318 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
320 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
321 built with Xft. These fonts can be set via X resources, for example:
322 Emacs.pane.menubar.font: Courier-12
326 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
327 or if it receives a SIGINT signal in batch mode.
329 *** `kill-emacs-hook' is now also run in batch mode.
330 Third-party code which adds to `kill-emacs-hook' should check if they
331 do the right thing in batch mode.
335 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
336 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
337 of buffer at first key-press (instead they move to top/bottom of buffer)
338 when `scroll-error-top-bottom' is non-nil.
340 *** New option `scroll-error-top-bottom' (see above).
342 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
343 scroll a line instead of full screen.
345 *** New property `scroll-command' should be set on a command's symbol to
346 define it as a scroll command affected by `scroll-preserve-screen-position'.
348 *** If you customize `scroll-conservatively' to a value greater than 100,
349 Emacs will never recenter point in the window when it scrolls due to
350 cursor motion commands or commands that move point (e.f., `M-g M-g').
351 Previously, you needed to use `most-positive-fixnum' as the value of
352 `scroll-conservatively' to achieve the same effect.
354 *** "Aggressive" scrolling now honors the scroll margins.
355 If you customize `scroll-up-aggressively' or
356 `scroll-down-aggressively' and move point off the window, Emacs now
357 scrolls the window so as to avoid positioning point inside the scroll
360 ** Basic SELinux support has been added.
361 This requires Emacs to be linked with libselinux at build time.
363 *** Emacs preserves the SELinux file context when backing up.
364 Also, the function `copy-file' has an extra optional argument for
365 preserving SELinux context, and the return value of `backup-buffer'
366 now includes the SELinux context.
368 *** New functions `file-selinux-context' and `set-file-selinux-context'
369 get and set the SELinux context of a file.
373 *** `delete-by-moving-to-trash' now only affects commands that specify
374 trashing. This avoids inadvertently trashing temporary files.
376 *** Calling `delete-file' or `delete-directory' with a prefix argument
377 now forces true deletion, regardless of `delete-by-moving-to-trash'.
379 ** File- and directory-local variable changes
381 *** You can stop directory local vars from applying to subdirectories.
382 Add an element (subdirs . nil) to the alist portion of any variables
383 settings to indicate that the section should not apply to
386 *** Directory local variables can apply to some file-less buffers.
387 Affected modes include dired, vc-dir, and log-edit. For example,
388 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
389 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
390 `hack-dir-local-variables-non-file-buffer' to support this.
392 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
393 Instead, use "eval: (minor-mode 1)".
395 *** The variable `inhibit-first-line-modes-regexps' has been renamed
396 to `inhibit-local-variables-regexps'. As the name suggests, it now
397 applies to ALL file local variables, not just -*- lines. The
398 associated `inhibit-first-line-modes-suffixes' has been renamed in the
403 *** The `quit-window' command now restores the last buffer displayed
404 in the quitted window.
406 *** Resizing an Emacs frame now preserves proportional window sizes,
407 modulo restrictions like window minimum sizes and fixed-size windows.
409 *** The behavior of `display-buffer' is now customizable in detail.
411 **** New option `display-buffer-base-action' specifies a list of
412 user-determined display "actions" (functions and optional arguments
413 for choosing the displaying window).
415 This takes precedence over the default display action, which is
416 specified by `display-buffer-fallback-action'.
418 **** New option `display-buffer-alist' maps buffer name regexps to
419 display actions, taking precedence over `display-buffer-base-action'.
421 *** New option `window-combination-limit'.
422 The new option `window-combination-limit' allows to return the space
423 obtained for resizing or creating a window more reliably to the window
424 from which such space was obtained.
426 *** New option `window-combination-resize'.
427 The new option `window-combination-resize' allows to split a window that
428 otherwise cannot be split because it's too small by stealing space from
429 other windows in the same combination. Subsequent resizing or deletion
430 of the window will resize all windows in the same combination as well.
432 *** New option `frame-auto-hide-function' lets you choose between
433 iconifying or deleting a frame when burying a buffer in a dedicated
434 frame, or quitting a window showing a buffer in a frame of its own.
436 *** New commands `maximize-window' and `minimize-window'.
437 These maximize and minimize the size of a window within its frame.
439 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
440 These functions allow to navigate through the live buffers that have
441 been shown in a specific window.
443 ** Minibuffer changes
445 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
446 This is handy for minibuffer-only frames, and is also used for the feature
447 where mouse-1 pops up *Messages*"', which can now easily be changed.
449 *** Minibuffers set `truncate-lines' to nil.
450 If you want to change the value to something else, you could use
451 for example `minibuffer-setup-hook'.
453 ** `auto-mode-case-fold' is now enabled by default.
455 ** `backup-by-copying-when-mismatch' now defaults to t.
457 ** New basic faces `error', `warning', `success'.
458 These are used to highlight text indicating failure, caution or
459 successful operation.
461 ** New option `list-colors-sort' defines the color sort order
462 for `list-colors-display'.
464 ** The variable `focus-follows-mouse' now always defaults to nil.
467 * Editing Changes in Emacs 24.1
471 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
474 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
477 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
479 ** New commands `count-words-region' and `count-words'.
481 *** M-= is bound to `count-words-region', not `count-lines-region'.
482 The `count-words-region' command, when called interactively, reports
483 the number of lines, words, and characters in the region. It is a
484 superset of the old `count-lines-region', which is now an obsolete
487 ** The command `just-one-space' (M-SPC), if given a negative argument,
488 also deletes newlines around point.
492 *** New option `delete-active-region'.
493 If non-nil, [delete] and DEL delete the region if it is active and no
494 prefix argument is given. If set to `kill', those commands kill
497 *** New command `delete-forward-char', bound to [delete].
498 This is meant for interactive use, and obeys `delete-active-region'.
499 The command `delete-char' does not obey `delete-active-region'.
501 *** `delete-backward-char' is now a Lisp function.
502 Apart from obeying `delete-active-region', its behavior is unchanged.
503 However, the byte compiler now warns if it is called from Lisp; Lisp
504 callers should use delete-char with a negative argument instead.
506 *** The option `mouse-region-delete-keys' has been deleted.
508 ** Selection changes.
510 The default handling of clipboard and primary selections has been
511 changed to conform with modern X applications. In short, most
512 commands for killing and yanking text now use the clipboard, while
513 mouse commands use the primary selection.
515 In the following, we provide a list of these changes, followed by a
516 list of steps to get the old behavior back if you prefer that.
518 *** `select-active-regions' now defaults to t.
519 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
520 the kill ring. The selected text is put in the primary selection, if
521 the system possesses a separate primary selection facility (e.g. X).
523 **** `select-active-regions' also accepts a new value, `only'.
524 This means to only set the primary selection for temporarily active
525 regions (usually made by mouse-dragging or shift-selection);
526 "ordinary" active regions, such as those made with C-SPC followed by
527 point motion, do not alter the primary selection.
529 **** `mouse-drag-copy-region' now defaults to nil.
531 *** mouse-2 is now bound to `mouse-yank-primary'.
532 This pastes from the primary selection, ignoring the kill-ring.
533 Previously, mouse-2 was bound to `mouse-yank-at-click'.
535 *** `x-select-enable-clipboard' now defaults to t on all platforms.
537 *** `x-select-enable-primary' now defaults to nil.
538 Thus, commands that kill text or copy it to the kill-ring (such as
539 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
541 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
542 exactly equivalent to M-w, C-w, and C-y respectively.
544 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
545 non-nil by default, as Windows does not support the primary selection
546 between applications.
548 *** To return to the previous behavior, do the following:
550 **** Change `select-active-regions' to nil.
551 **** Change `mouse-drag-copy-region' to t.
552 **** Change `x-select-enable-primary' to t (on X only).
553 **** Change `x-select-enable-clipboard' to nil.
554 **** Bind `mouse-yank-at-click' to mouse-2.
556 *** Support for X cut buffers has been removed.
558 *** X clipboard managers are now supported.
559 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
561 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
562 in the current rectangle. With a prefix argument, this prompts for a
563 number to count from and for a format string.
565 ** `redisplay-dont-pause' now defaults to t.
566 This makes Emacs feel more responsive to editing commands that arrive
567 at high rate, e.g. if you lean on some key, because stopping redisplay
568 in the middle (when this variable is nil) forces more expensive
569 updates later on, and Emacs appears to be unable to keep up.
571 ** The behavior of <TAB> for active regions in Text mode has changed.
572 In Text and related modes, typing <TAB> (`indent-for-tab-command')
573 when the region is active causes Emacs to indent all the lines in the
574 region, aligning them with the line previous to the first line in the
575 region (or with the left margin if there is no previous line).
577 ** When `occur' is called with a prefix argument, matching strings are
578 collected into the `*Occur*' buffer without line numbers. If there
579 are parenthesized subexpressions in the specified regexp, `occur'
580 reads replacement text that may contain \\& and \\N whose convention
581 follows `replace-match'.
584 * Changes in Specialized Modes and Packages in Emacs 24.1
586 ** Archive Mode has basic support for browsing and updating 7z archives.
590 *** BibTeX mode now supports biblatex.
591 Use the variable `bibtex-dialect' to select different BibTeX dialects.
592 `bibtex-entry-field-alist' is now an obsolete alias for
593 `bibtex-BibTeX-entry-alist'.
595 *** New command `bibtex-search-entries', bound to C-c C-a.
597 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
599 *** New variable `bibtex-search-entry-globally'.
603 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
605 *** The default browser used by the package is now the "xdg-open" program,
606 on platforms that support it. This calls your desktop's preferred browser.
608 ** Calendar, Diary, and Appt
610 *** Diary entries can contain non-printing "comments".
611 See the variable `diary-comment-start'.
613 *** Appointments can specify their individual warning times.
614 See the variable `appt-warning-time-regexp'.
616 *** The function specified by `appt-disp-window-function' may be passed
617 lists of arguments if multiple appointments are due at similar times.
618 If you are using a custom function for this, you should update it.
620 *** New function `diary-hebrew-birthday'.
622 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
623 may no longer be nil, but must all be strings.
625 *** The obsolete (since Emacs 22.1) method of enabling the appt
626 package by adding `appt-make-list' to `diary-hook' has been removed.
627 Use `appt-activate' instead.
629 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
630 appt-issue-message (use the function appt-activate)
631 appt-visible/appt-msg-window (use the variable appt-display-format)
633 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
634 view-diary-entries, list-diary-entries, show-all-diary-entries
638 *** New feature to "guess" the style in an existing buffer.
639 The main entry point is M-x c-guess.
641 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
643 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
644 Thus C-M-a will, by default, go to the beginning of the immediate function,
647 *** "Macros with semicolons" can be registered for correct indentation.
648 Where such a macro ends a line (no semicolon) the next statement is no longer
649 parsed as a statement continuation.
651 ** Comint and modes derived from it use the standard completion code.
655 *** Compilation mode can be used without Font Lock mode.
656 `compilation-parse-errors-function' is now obsolete.
658 *** New variable `compilation-filter-start', which is bound while
659 `compilation-filter-hook' runs. It records the start position of the
660 text inserted by `compilation-filter'.
662 *** `compilation-error-screen-columns' and `compilation-first-column'
663 are obeyed in the editing buffer. So programming language modes can
664 set them, whereas previously only the value in the *Compilation*
669 *** Customize buffers now contain a search field.
670 The search is performed using `customize-apropos'.
671 To turn off the search field, set `custom-search-field' to nil.
673 *** Custom options now start out hidden if at their default values.
674 Use the arrow to the left of the option name to toggle visibility.
676 *** custom-buffer-sort-alphabetically now defaults to t.
678 *** The color widget now has a "Choose" button, which allows you to
679 choose a color via `list-colors-display'.
683 *** It is now possible to access buses other than the default system
686 *** The `dbus-register-method' and `dbus-register-property' functions
687 optionally do not register names.
689 *** The new function `dbus-register-service' registers a known service
690 name on a D-Bus without also registering a property or a method.
694 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
695 if called with a prefix argument, read a file name from the minibuffer
696 instead of using the current buffer.
698 *** The "dired local variables" feature of Dired-x is obsolete.
699 The standard directory local variables feature replaces it.
703 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
704 controlling attempts to autojoin a channel.
706 *** New variable `erc-coding-system-precedence': If we use `undecided'
707 as the server coding system, this variable will then be consulted.
708 The default is to decode strings that can be decoded as utf-8 as
709 utf-8, and do the normal `undecided' decoding for the rest.
713 *** The default value of `eshell-directory-name' has changed
714 to be an "eshell" directory in `user-emacs-directory'.
715 The old "~/.eshell/" directory is still used if it exists, though.
719 *** The M-x gdb command now uses the GDB Machine Interface protocol.
720 It now supports multithread non-stop debugging and simultaneous
721 debugging of several threads.
725 *** RET (`image-toggle-animation') toggles animation, if applicable.
726 Animation plays once, unless the option `image-animate-loop' is non-nil.
730 *** New command M-x info-display-manual displays a named Info manual.
731 If that manual is already visited in some Info buffer, it displays
732 that buffer. (This is handy if you have many manuals in many *info*
733 buffers, and don't remember the name of the buffer visiting the manual
734 you want to consult.) Otherwise, it loads and displays the manual.
736 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
737 This is for compatibility with the stand-alone Info reader program,
738 and also because `Info-edit' is a rarely used command that is disabled
741 ** Mail mode changes (not Message mode)
743 *** New command M-x mail-add-attachment for adding MIME attachments
745 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
746 (Its name is misleading, since it has nothing to do with MIME
747 attachments.) The old name is now an obsolete alias to the new name.
749 ** MH-E has been upgraded to MH-E version 8.3.1.
750 See MH-E-NEWS for details.
752 ** Modula-2 mode provides auto-indentation.
754 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
756 ** nXML mode no longer binds C-RET to `nxml-complete'.
757 Completion is now performed via `completion-at-point', bound to C-M-i
758 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
759 default), this performs tag completion.
761 ** Prolog mode has been completely revamped, with lots of additional
762 functionality such as more intelligent indentation, electricity,
763 support for more variants, including Mercury, and a lot more.
767 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
768 in the Rmail incoming message.
770 *** The variable `rmail-message-filter' no longer has any effect.
771 This change was made in Emacs 23.1 but was not advertised at the time.
772 Try using `rmail-show-message-hook' instead.
776 *** M-x shell prompts for the shell path name if the default directory
777 is a remote file name and neither the environment variable $ESHELL nor
778 the variable `explicit-shell-file-name' is set.
780 *** TAB is now bound to the standard `completion-at-point' command,
781 which now implements the pcomplete rules for shell command completion.
785 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
786 if the mail server supports them. This uses either built-in GnuTLS
787 support, or the starttls.el library. Customize `smtpmail-stream-type'
790 *** The variable `smtpmail-auth-credentials' has been removed.
791 By default, the information is now stored in the file ~/.authinfo.
792 This was the default value of smtpmail-auth-credentials. If you had
793 customized smtpmail-auth-credentials to a list of user names and
794 passwords, those settings are not used. During your first connection
795 to the smtp server, Emacs will prompt for the user name and password,
796 and offer to save them to ~/.authinfo. Or you can manually copy the
797 credentials to ~/.authinfo. For example, if you had
799 (setq smtpmail-auth-credentials
800 '(("mail.example.org" 25 "jim" "s!cret")))
802 then the equivalent line in ~/.authinfo would be
804 machine mail.example.org port 25 login jim password s!cret
806 See the auth-source manual for more information, e.g. on encrypting
807 the credentials file.
809 *** The variable `smtpmail-starttls-credentials' has been removed.
810 If you had that set, you need to put
812 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
814 in your ~/.authinfo file instead.
818 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
819 and `sql-oracle-scan-on'.
821 *** New options controlling prompting for login parameters.
822 Each supported product has a custom variable `sql-*-login-params',
823 which is a list of the parameters to be prompted for before a
824 connection is established.
826 *** The command `sql-product-interactive' now takes a prefix argument,
827 which causes it to prompt for an SQL product.
829 *** Product-specific SQL interactive commands now take prefix arguments.
830 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
831 given a prefix argument, prompt for a name for the SQL interactive
832 buffer. This reduces the need for calling `sql-rename-buffer'.
834 *** SQL interactive modes suppress command continuation prompts, and
835 replace tabs with spaces. The first change impacts multiple line SQL
836 statements entered with C-j between each line, statements yanked into
837 the buffer and statements sent with `sql-send-*' functions. The
838 second prevents the MySQL and Postgres interpreters from listing
839 object name completions when sent text via `sql-send-*' functions.
841 *** New command `sql-connect' starts a predefined SQLi session,
842 using the login parameters from `sql-connection-alist'.
844 *** New "Save Connection" menu item in SQLi buffers.
845 This gathers the login params specified for the SQLi session, if it
846 was not started by a connection, and saves them as a new connection.
848 *** New commands for listing database objects and details:
849 sql-list-all and sql-list-table.
851 *** An API for manipulating SQL product definitions has been added.
855 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
859 *** New inline access method "ksu" (kerberized su).
861 *** The following access methods are discontinued: "ssh1_old",
862 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
864 *** The user option `remote-file-name-inhibit-cache' controls whether
865 remote file attributes are cached for better performance.
867 *** The option `ange-ftp-binary-file-name-regexp' has changed its
870 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
871 for remote machines which support SELinux.
873 ** New function `url-queue-retrieve', which behaves like url-retrieve,
874 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
875 the degree of parallelism.
877 ** VC and related modes
879 *** Support for pulling on distributed version control systems.
880 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
881 supported (currently with Bzr, Git, and Mercurial), to update the
882 current branch and working tree. A prefix argument means to prompt
883 the user for specifics, e.g. a pull location.
885 *** `vc-update' is now an alias for `vc-pull'.
887 *** Support for merging on distributed version control systems.
888 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
889 is supported (currently with Bzr, Git, and Mercurial), to merge
890 changes from another branch into the current one. It prompts for
891 specifics, e.g. a merge source.
893 *** New option `vc-revert-show-diff' controls whether `vc-revert'
894 shows a diff while querying the user. It defaults to t.
896 *** Log entries in some Log View buffers can be toggled to display a
897 longer description by typing RET (log-view-toggle-entry-display).
898 This is currently supported for Bzr, Git, and Mercurial (to support
899 another backend, define a `log-view-expanded-log-entry-function').
900 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
901 use this to display the full log entry for the revision at point.
903 *** New command `vc-ediff' allows visual comparison of two revisions
904 of a file similar to `vc-diff', but using ediff backend.
906 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
907 this was not advertised at the time.
909 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
910 Since Emacs 23, it has done the same thing as `toggle-read-only', but
911 this was not advertised at the time.
917 *** erc-hecomplete.el (use erc-pcomplete.el instead)
919 *** partial-completion-mode (complete.el) is obsolete.
920 You can get a comparable behavior with:
921 (setq completion-styles '(partial-completion initials))
922 (setq completion-pcm-complete-word-inserts-delimiters t)
924 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
926 *** pgg is obsolete (use EasyPG instead).
928 *** sregex.el is obsolete, since rx.el is a strict superset.
930 *** s-region.el and pc-select.el are obsolete.
931 They are superseded by shift-select-mode, enabled by default since 23.1.
933 *** vc-mcvs.el is obsolete (for lack of a maintainer).
937 *** The Landmark game is now invoked with `landmark', not `lm'.
938 Its functions and variables have been similarly renamed.
940 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
941 (This interfered with cua-mode.)
943 *** f90.el has some support for Fortran 2008 syntax.
945 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
947 *** New command `nato-region' converts text to NATO phonetic alphabet.
950 * New Modes and Packages in Emacs 24.1
952 ** Occur Edit mode applies edits made in *Occur* buffers to the
953 original buffers. It is bound to "e" in Occur mode.
955 ** New global minor mode electric-pair-mode.
956 When enabled, typing an open parenthesis automatically inserts the
957 matching closing one.
959 ** New global minor mode electric-indent-mode.
960 When enabled, typing certain characters triggers reindentation.
961 Major modes wishing to use this can set electric-indent-chars or
962 electric-indent-functions.
964 ** New global minor mode electric-layout-mode.
965 When enabled, typing certain characters automatically inserts newlines.
966 Major modes wishing to use this can set electric-layout-rules.
968 ** tabulated-list.el provides a generic major mode for tabulated data,
969 from which other modes can be derived.
971 ** pcase.el provides the ML-style pattern matching macro `pcase'.
973 ** secrets.el is an implementation of the Secret Service API, an
974 interface to password managers like GNOME Keyring or KDE Wallet. The
975 Secret Service API requires D-Bus for communication. The command
976 `secrets-show-secrets' offers a buffer with a visualization of the
979 ** notifications.el provides an implementation of the Desktop
980 Notifications API. It requires D-Bus for communication.
982 ** soap-client.el supports access to SOAP web services from Emacs.
983 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
985 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
987 ** New emacs-lock.el package.
988 The previous version has been moved to obsolete/old-emacs-lock.el.
989 Now, there is a proper minor mode `emacs-lock-mode'. Protection
990 against exiting Emacs and killing the buffer can be set separately.
991 The mechanism for automatically turning off protection for buffers
992 with dead inferior processes has been generalized.
995 * Incompatible Lisp Changes in Emacs 24.1
997 ** Passing a nil argument to a minor mode function call now ENABLES
998 the minor mode unconditionally. This is so that you can write e.g.
1000 (add-hook 'text-mode-hook 'foo-mode)
1002 to enable foo-mode in Text mode buffers, removing the need for
1003 `turn-on-foo-mode' style functions. This affects all mode commands
1004 defined by `define-minor-mode'. If called interactively, the mode
1005 command still toggles the minor mode.
1007 ** The return value of `backup-buffer' has changed.
1008 It is now a list of three elements, where the second element is a list
1009 describing the original file's SELinux context. If Emacs or the
1010 system lacks SELinux support, the context list is (nil nil nil nil).
1011 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
1013 ** `char-direction-table' and the `char-direction' function were deleted.
1014 They were buggy and inferior to the new support of bidirectional
1015 editing introduced in Emacs 24. If you need the bidirectional
1016 properties of a character, use `get-char-code-property' with the last
1017 argument `bidi-class'.
1019 ** `copy-directory' now copies the source directory as a subdirectory
1020 of the target directory, if the latter is an existing directory. The
1021 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
1022 the contents directly into a pre-existing target directory.
1024 ** For mouse click input events in the text area, the Y pixel
1025 coordinate in the POSITION list now counts from the top of the text
1026 area, excluding any header line. Previously, it counted from the top
1029 ** Support for "old-style" backquotes, obsolete for 10+ years, has
1030 been further reduced. Now a backquote not followed by a space is
1031 always treated as a "new-style" backquote. Please remove all
1032 "old-style" backquotes from your code. If your code uses backquotes
1033 as documented in the Elisp manual, and compiles without warning, then
1034 you have nothing to do in this regard. Code not following the
1035 appropriate conventions may fail to compile.
1037 The most common cause of trouble seems to be an old-style backquote
1038 followed by a newline. Another cause of trouble is vector notation
1039 for key sequence notation: instead of [(control ,)] and [(control ')],
1040 you should write [(control ?,)] and [(control ?')], which will work in
1043 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
1044 was not advertised at the time. The function `custom-initialize-delay'
1045 replaced all known uses.
1047 ** `view-buffer' now treats special mode-class in the same way that
1048 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
1049 major mode is special).
1051 ** Menu and tool bar changes
1053 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
1054 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
1055 With these alist entries omitted, `make-frame' checks the value of the
1056 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
1057 a menu-bar or tool-bar, respectively. If the alist entries are added,
1058 they override the value of `menu-bar-mode'/`tool-bar-mode'.
1060 *** The menu bar bindings's caches are not used any more.
1061 Use (where-is-internal <def> nil t) instead.
1063 ** Regions created by mouse dragging are now normal active regions,
1064 similar to those created by shift-selection (see Selection changes
1065 above). In previous Emacs versions, these regions were delineated by
1066 `mouse-drag-overlay'; that variable has been removed.
1068 ** The fourth argument of `filter-buffer-substring' has been removed.
1069 If you want to remove text properties from the final result, simply
1070 pass the result through substring-no-properties.
1072 ** cl.el no longer provides `cl-19'.
1074 ** The following obsolete functions and aliases have been removed
1075 (the appropriate new function is given in parentheses; "not needed"
1076 means you can just remove all calls to the function in question):
1078 *** `comint-kill-output' (`comint-delete-output')
1079 *** `decompose-composite-char' (`char-to-string')
1080 *** `outline-visible' (`outline-invisible-p')
1081 *** `internal-find-face' (`facep')
1082 *** `internal-get-face' (`facep and check-face')
1083 *** `frame-update-faces' (not needed)
1084 *** `frame-update-face-colors' (`frame-set-background-mode')
1085 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
1086 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
1087 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
1088 *** `x-make-font-bold-italic' (`make-face-bold-italic')
1089 *** `x-make-font-unbold' (`make-face-unbold')
1090 *** `x-make-font-unitalic' (`make-face-unitalic')
1091 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
1092 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
1093 *** `iswitchb-default-keybindings' (`iswitchb-mode')
1094 *** `char-bytes' (== 1)
1095 *** `isearch-return-char' (`isearch-printing-char')
1096 *** `make-local-hook' (not needed)
1097 *** `set-screen-height' (`set-frame-height')
1098 *** `set-screen-width' (`set-frame-width')
1100 ** The following obsolete variables and varaliases have been removed
1101 (the appropriate new variable is given in parentheses):
1103 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
1104 *** `vc-header-alist' (`vc-BACKEND-header')
1105 *** `directory-sep-char' (== ?/)
1106 *** `font-lock-defaults-alist' (`font-lock-defaults')
1107 *** `e' (`float-e').
1109 ** The following obsolete files were removed:
1110 sc.el, x-menu.el, rnews.el, rnewspost.el
1112 ** The format of the finder-inf.el file has changed, since the Finder
1113 mechanism is now based on the package system. The variable
1114 `finder-package-info' is replaced by `package--builtins' and
1115 `finder-keywords-hash'.
1117 ** When generating autoloads, `update-directory-autoloads' no longer
1118 assumes every inspected file is in your `load-path'. It instead
1119 generates relative names according to the current `load-path'.
1122 * Lisp changes in Emacs 24.1
1124 ** Code can now use lexical scoping by default instead of dynamic scoping.
1125 The `lexical-binding' variable enables lexical scoping for local
1126 variables. It is typically set via a file-local variable in the first
1127 line of the file, in which case it applies to all the code in that
1130 *** `eval' takes a new optional argument `lexical' to choose the new lexical
1131 binding instead of the old dynamic binding mode.
1133 *** Lexically scoped interpreted functions are represented with a new form
1134 of function value which looks like (closure ENV ARGS &rest BODY).
1136 *** New macro `letrec' to define recursive local functions.
1138 *** `defvar' and `defconst' now mark the variable as special (dynamic).
1139 So do `defcustom' and other forms that call `defvar' as a subroutine.
1141 *** New function `special-variable-p' to check whether a variable is
1142 declared as dynamically bound.
1144 ** An Emacs Lisp testing tool is now included.
1145 Emacs Lisp developers can use this tool to write automated tests for
1146 their code. See the ERT info manual for details.
1148 ** Changes for bidirectional display and editing
1150 *** New function `current-bidi-paragraph-direction'.
1151 This returns the base direction of the paragraph at point.
1153 *** New function `bidi-string-mark-left-to-right'.
1154 Given a string containing characters from right-to-left scripts, this
1155 function returns another string which can be safely inserted into a
1156 buffer, such that any following text will be always displayed to the
1157 right of that string. (This works by appending an invisible Unicode
1158 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
1160 This is useful when the buffer has overall left-to-right paragraph
1161 direction and you need to insert a string whose contents are not known
1162 in advance, without disrupting the layout of the line.
1166 *** Window tree functions are accessible in Elisp.
1167 Functions are provided to return the parent, siblings or child windows
1168 of any window including internal windows (windows not associated with a
1169 buffer) in the window tree.
1171 **** New function `window-valid-p' gives non-nil for live and internal
1174 **** Window manipulation can deal with internal windows.
1175 Many window handling functions like `split-window', `delete-window', or
1176 `delete-other-windows' as well as the window resizing functions can now
1177 act on any window including internal ones.
1179 *** window-total-height/-width vs window-body-height/-width.
1180 The function `window-height' has been renamed to `window-total-height'
1181 and `window-width' has been renamed to `window-body-width'. The old
1182 names are provided as aliases. Two new functions `window-total-width'
1183 and `window-body-height' are provided.
1185 *** Window parameters specific to window handling functions.
1186 For each window you can specify a parameter to override the default
1187 behavior of a number of functions like `split-window', `delete-window'
1188 and `delete-other-windows'. The variable `ignore-window-parameters'
1189 allows to ignore processing such parameters.
1191 *** New semantics of third argument of `split-window'.
1192 The third argument of `split-window' has been renamed to SIDE and can be
1193 set to any of the values 'below, 'right, 'above, or 'left to make the
1194 new window appear on the corresponding side of the window that shall be
1195 split. Any other value of SIDE will cause `split-window' to split the
1196 window into two side-by-side windows as before.
1198 *** Window resizing functions.
1199 A new standard function for resizing windows called `window-resize' has
1200 been introduced. This and all other functions for resizing windows no
1201 longer delete any windows when they become too small.
1203 *** Deleting the selected window now selects the most recently selected
1204 live window on that frame instead.
1206 *** `adjust-window-trailing-edge' adjustments.
1207 `adjust-window-trailing-edge' can now deal with fixed-size windows and
1208 is able to resize other windows if a window adjacent to the trailing
1209 edge cannot be shrunk any more. This makes its behavior more similar to
1210 that of Emacs 21 without compromising, however, its inability to delete
1211 windows which was introduced in Emacs 22.
1213 *** Window-local buffer lists.
1214 Windows now have local buffer lists. This means that removing a buffer
1215 from display in a window will preferably show the buffer previously
1216 shown in that window with its previous window-start and window-point
1217 positions. This also means that the same buffer may be automatically
1218 shown twice even if it already appears in another window.
1220 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
1221 which if non-nil requires the buffer to be displayed in the currently
1222 selected window, signaling an error otherwise. If nil, another window
1223 can be used, e.g. if the selected one is strongly dedicated.
1225 *** `split-window-vertically' and `split-window-horizontally' renamed
1226 to `split-window-below' and `split-window-right' respectively.
1227 The old names are kept as aliases.
1231 **** The second arg to `display-buffer' and `pop-to-buffer' is now
1232 named ACTION, and takes a display action of the same form as
1233 `display-buffer-base-action' (see Changes, above). A non-nil,
1234 non-list value is treated specially, as the old meaning.
1236 **** New variable `display-buffer-overriding-action'.
1238 **** The procedure of `display-buffer' etc. to choose a window is
1239 determined by combining `display-buffer-overriding-action',
1240 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
1241 and `display-buffer-fallback-action'. The second and fourth of these
1242 are user-customizable variables.
1244 See the docstring of `display-buffer' for details.
1246 *** New functions `window-state-get' and `window-state-put'.
1247 These functions allow to save and restore the state of an arbitrary
1248 frame or window as an Elisp object.
1252 *** New variable `completion-extra-properties' used to specify extra
1253 properties of the current completion:
1254 - :annotate-function, same as the old completion-annotate-function.
1255 - :exit-function, function to call after completion took place.
1257 *** Functions on `completion-at-point-functions' can return any of the
1258 properties valid for `completion-extra-properties'.
1260 *** `completion-annotate-function' is obsolete.
1262 *** New `metadata' method for completion tables. The metadata thus returned
1263 can specify various details of the data returned by `all-completions':
1264 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
1265 used to select a style in completion-category-overrides.
1266 - `annotation-function' to add annotations in *Completions*.
1267 - `display-sort-function' to specify how to sort entries in *Completions*.
1268 - `cycle-sort-function' to specify how to sort entries when cycling.
1270 *** `minibuffer-local-filename-must-match-map' is not used any more.
1271 Instead, the bindings in `minibuffer-local-filename-completion-map'
1272 are combined with `minibuffer-local-must-match-map'.
1274 *** New variable `completing-read-function' allows overriding the
1275 behavior of `completing-read'.
1277 ** `glyphless-char-display' can now distinguish between graphical and
1278 text terminal display, via a char-table entry that is a cons cell.
1280 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
1281 Instead, the offending function is removed.
1285 *** New function `run-hook-wrapped' for running an abnormal hook by
1286 passing the hook functions as arguments to a "wrapping" function.
1287 Like `run-hook-with-args-until-success', it stops at the first
1288 non-nil return value.
1290 *** New macro `with-wrapper-hook' for running an abnormal hook as a
1291 set of "wrapping" filters, similar to around advice.
1292 (A version of this macro was actually added in Emacs 23.2 but was not
1293 advertised at the time.)
1297 *** New macro `condition-case-unless-debug' (this was actually added in
1298 Emacs 23.1 as condition-case-no-debug, but not advertised)
1300 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
1302 *** Variable `stack-trace-on-error' removed.
1304 *** The debugger can now "continue" from an error, which means it will
1305 jump to the error handler as if the debugger had not been invoked
1306 instead of jumping all the way to the top-level.
1308 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
1309 This can be useful when `inhibit-quit' is set.
1311 ** The new function `server-eval-at' allows evaluation of Lisp forms on
1312 named Emacs server instances.
1314 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
1315 to redirect STDOUT to a file.
1317 ** The function `format-time-string' now supports the %N directive,
1318 for higher-resolution time stamps.
1320 ** New input reading functions
1322 *** New function `read-char-choice' reads a restricted set of
1323 characters, discarding any inputs not inside the set.
1325 *** The command `read-color' now requires a match for a color name
1326 or RGB triplet, instead of signaling an error if the user provides
1329 **** `facemenu-read-color' is now an alias for `read-color'.
1331 ** `image-library-alist' is renamed to `dynamic-library-alist'.
1332 The variable is now used to load all kind of supported dynamic libraries,
1333 not just image libraries. The previous name is still available as an
1336 ** Syntax parsing changes
1338 *** New variable `syntax-propertize-function'.
1339 This replaces `font-lock-syntactic-keywords' which is now obsolete.
1340 This allows syntax-table properties to be set independently from font-lock:
1341 just call syntax-propertize to make sure the text is propertized.
1342 Together with this new variable come a new hook
1343 syntax-propertize-extend-region-functions, as well as two helper functions:
1344 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
1345 as-is; and syntax-propertize-rules which provides a new way to specify
1348 *** Syntax tables support a new "comment style c" additionally to style b.
1350 ** New hook `post-self-insert-hook', run after `self-insert-command'.
1352 ** frame-local variables cannot be let-bound any more.
1354 ** Major and minor mode changes
1356 *** `set-auto-mode' now respects mode: local variables at the end of files,
1357 as well as those in the -*- line.
1359 *** `prog-mode' is a new major mode from which programming modes
1362 **** `prog-mode-hook' can be used to enable features for programming
1363 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
1364 on-the-fly spell checking for comments and strings.
1366 *** New hook `change-major-mode-after-body-hook', run by
1367 `run-mode-hooks' just before any other mode hooks.
1369 *** Enabled globalized minor modes can be disabled in specific major modes.
1370 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
1371 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
1373 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
1375 ** File-handling changes
1377 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
1378 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
1379 both non-nil. Interactively, TRASH defaults to t, unless a prefix
1380 argument is supplied (see Trash changes, above).
1382 *** New file predicates: `file-equal-p', `file-in-directory-p'.
1384 ** Tool-bars can display separators.
1385 Tool-bar separators are handled like menu separators in menu-bar maps,
1386 i.e. via menu entries of the form `(menu-item "--")'.
1390 *** Animated images support (currently animated gifs only).
1392 **** `image-animated-p' returns non-nil if an image can be animated.
1394 **** `image-animate' animates a supplied image spec.
1396 **** `image-animate-timer' returns the timer object for an image that
1399 *** `image-extension-data' has been renamed to `image-metadata'.
1400 The old name is an obsolete alias to the new one.
1402 *** Image mode can view any image type that ImageMagick supports.
1403 This requires Emacs to be built with ImageMagick support.
1405 **** New function `imagemagick-types', defined if ImageMagick support
1406 is enabled, returns a list of image file extensions that your
1407 ImageMagick installation supports.
1409 **** New function `imagemagick-register-types' enables ImageMagick
1410 image types in Image mode and in `create-image' and other helper
1413 **** New option `imagemagick-types-inhibit' excludes certain
1414 ImageMagick image types from `imagemagick-register-types'.
1416 **** With ImageMagick support, there are extra Image mode commands to
1417 resize and rotate images: `image-transform-fit-to-height',
1418 `image-transform-fit-to-width', `image-transform-set-rotation', and
1419 `image-transform-set-scale'.
1421 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
1422 passes it to the mail user agent function. This argument specifies an
1423 action for returning to the caller after finishing with the mail. For
1424 example, this is used by Rmail to optionally delete a mail window.
1426 ** XML and HTML parsing
1427 If Emacs is compiled with libxml2 support, there are two new
1428 functions: `libxml-parse-html-region' (which parses "real world" HTML)
1429 and `libxml-parse-xml-region' (which parses XML). Both return an
1430 Emacs Lisp parse tree.
1432 ** Networking and encryption changes
1434 *** `open-network-stream' can now be used to open an encrypted stream.
1435 It now accepts an optional `:type' parameter for initiating a TLS
1436 connection, directly or via STARTTLS. To do STARTTLS, additional
1437 parameters (`:end-of-command', `:success', `:capabilities-command')
1438 must also be supplied.
1440 *** New library gnutls.el.
1441 The new function `gnutls-available-p' returns non-nil if Emacs is
1442 built with GnuTLS support. The main entry points are
1443 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
1444 these functions through `open-network-stream', because that can
1445 upgrade connections through STARTTLS opportunistically or use plain
1446 SSL, depending on your needs. For debugging, set `gnutls-log-level'
1449 *** New primitive `secure-hash' that supports many secure hash algorithms:
1450 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
1451 sha1.el has been removed. The `sha1' feature is provided by default.
1455 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
1457 ** Progress reporters can now "spin".
1458 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
1459 now be nil, or omitted. This makes a "non-numeric" reporter. Each
1460 time you call `progress-reporter-update' on that progress reporter,
1461 with a nil or omitted VALUE argument, the reporter message is
1462 displayed with a "spinning bar".
1464 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
1465 being reverted, even if the buffer has a local `revert-buffer-function'.
1467 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
1468 If delayed-warnings-list is non-nil, the command loop calls
1469 `delayed-warnings-hook' after `post-command-hook'. At present, this
1470 is only used by Emacs on some platforms to display warnings during
1471 startup, which might otherwise not be noticed. This uses the
1472 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
1474 ** rx.el has a new `group-n' construct for explicitly numbered groups.
1476 ** New function `make-composed-keymap' that constructs a new keymap
1477 from multiple input maps. You can use this to make a keymap that
1478 inherits from multiple maps, eg:
1479 (set-keymap-parent newmap (make-composed-keymap othermap parent))
1481 ** New function `string-prefix-p'.
1482 (This was actually added in Emacs 23.2 but was not advertised at the time.)
1484 ** New reader macro ## that stands for the empty symbol.
1485 This means that the empty symbol can now be read back. Also, #: by itself
1486 (when not immediately followed by a possible symbol character) stands for
1487 an empty uninterned symbol.
1489 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
1491 ** The following functions and variables are obsolete:
1493 *** `tooltip-use-echo-area' is obsolete.
1494 Rather than setting this to t, disable Tooltip mode instead.
1496 *** buffer-substring-filters is obsolete.
1497 Use `filter-buffer-substring-functions' instead.
1499 *** `byte-compile-disable-print-circle' is obsolete.
1501 *** `deferred-action-list' and `deferred-action-function' are obsolete.
1502 Use `post-command-hook' instead.
1504 *** `font-lock-maximum-size' is obsolete.
1507 * Changes in Emacs 24.1 on non-free operating systems
1509 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
1510 and also when HOME is set to C:\ by default.
1512 ** New configure.bat options
1514 *** --enable-checking builds Emacs with extra runtime checks.
1516 *** --distfiles specifies files to be included in binary distribution.
1518 *** --without-gnutls disables automatic GnuTLS detection.
1520 *** --lib for general library linkage, works with the USER_LIBS build variable.
1522 ** New make target `dist' to create binary distribution for MS Windows.
1524 ** The Lisp function `w32-default-color-map' is now obsolete.
1525 (It is only used internally in the Emacs C code.)
1527 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
1528 reappear on mouse-over. (Requires OS X 10.6 or later.)
1530 ** On Mac OS X, dragging a file into Emacs visits the file, like on
1531 other platforms, rather than inserting its contents into the buffer.
1534 ----------------------------------------------------------------------
1535 This file is part of GNU Emacs.
1537 GNU Emacs is free software: you can redistribute it and/or modify
1538 it under the terms of the GNU General Public License as published by
1539 the Free Software Foundation, either version 3 of the License, or
1540 (at your option) any later version.
1542 GNU Emacs is distributed in the hope that it will be useful,
1543 but WITHOUT ANY WARRANTY; without even the implied warranty of
1544 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1545 GNU General Public License for more details.
1547 You should have received a copy of the GNU General Public License
1548 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
1553 paragraph-separate: "[
\f]*$"