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
30 may or may not be useful. By default, these warnings are not generated.
33 * Startup Changes in Emacs 24.2
35 * Changes in Emacs 24.2
37 ** If your Emacs was built from a bzr checkout, the new variable
38 `emacs-bzr-version' contains information about which bzr revision was used.
41 * Editing Changes in Emacs 24.2
43 * Changes in Specialized Modes and Packages in Emacs 24.2
45 * New Modes and Packages in Emacs 24.2
47 * Incompatible Lisp Changes in Emacs 24.2
49 * Lisp changes in Emacs 24.2
51 * Changes in Emacs 24.2 on non-free operating systems
53 ** New configure.bat options on MS-Windows:
55 *** --without-libxml2 omits support for libxml2, even if its presence
59 * Installation Changes in Emacs 24.1
61 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
62 to configure. Note that other libraries used by Emacs, RSVG and GConf,
63 also depend on Gtk+. You can disable them with --without-rsvg and
66 ** Emacs can be compiled with GnuTLS support.
67 This happens by default if a suitably recent version of the library is
68 found at build time. To prevent this, use the configure option
69 `--without-gnutls'. See below for GnuTLS features.
71 ** Emacs can be compiled with SELinux support.
72 This happens by default if a suitably recent version of the library is
73 found at build time. To prevent this, use the configure option
74 `--without-selinux'. See below for SELinux features.
76 ** Emacs can be compiled with ImageMagick support.
77 This happens by default if a suitably recent version of the library is
78 found at build time. To prevent this, use the configure option
79 `--without-imagemagick'. See below for ImageMagick features.
80 This feature is not available for the Nextstep or MS ports.
82 ** Emacs can be compiled with libxml2 support.
83 This happens by default if a suitably recent version of the library is
84 found at build time. To prevent this, use the configure option
85 `--without-xml2'. See below for libxml2 features.
87 ** By default, the installed Info and man pages are compressed.
88 You can disable this by configuring --without-compress-info.
90 ** New configure option --with-wide-int.
91 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
92 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
95 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
96 These provide no new functionality, they just remove the need to edit
97 lib-src/Makefile by hand in order to use the associated features.
99 ** New configure option --enable-use-lisp-union-type.
100 This is only useful for Emacs developers to debug certain types of bugs.
101 This is not a new feature; only the configure flag is new.
103 ** The standalone programs digest-doc and sorted-doc are removed.
104 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
106 ** The standalone program `fakemail' is removed.
107 If you need it, feedmail.el provides a superset of the functionality.
110 * Startup Changes in Emacs 24.1
112 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
113 command line arguments, and the EMACS_UNIBYTE environment variable, no
114 longer have any effect. (They were declared obsolete in Emacs 23.)
116 ** New command line option `--no-site-lisp' removes site-lisp directories
117 from load-path. -Q now implies this. This option does not affect the
118 EMACSLOADPATH environment variable (and hence has no effect for
122 * Changes in Emacs 24.1
126 *** Many packages now use the `completion-at-point' command,
127 rather than implementing separate completion commands.
129 *** `completion-at-point' now handles tags and semantic completion.
131 *** Completion in a non-minibuffer now tries to detect the end of completion
132 and pops down the *Completions* buffer accordingly.
134 *** New option `completion-cycle-threshold' allows completion cycling.
136 *** New option `completion-category-overrides' for overriding the
137 default completion style in certain circumstances.
139 *** New completion style `substring'.
141 *** Completion of buffer names uses `substring' completion by default.
143 *** The option `widget-complete-field' has been removed.
147 *** The first time you try sending mail, Emacs asks for a mail method.
148 This is implemented by a new default for `send-mail-function', which
149 is `sendmail-query-once'. This offers to use the smtpmail package, or
150 to use the old defaults relying on external mail facilities
151 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
152 `mailclient-send-it' on Windows).
154 *** Typing C-c m in the buffer made by M-x report-emacs-bug transfers
155 the report to your desktop's preferred mail client, if there is one.
156 This uses either the "xdg-email" utility, or Mac OS's "open" command.
158 *** See Changes in Specialized Modes and Packages for SMTPmail changes
159 and Mail mode changes
161 ** Emacs server and client changes
163 *** New option `server-port' specifies the port for TCP Emacs servers.
165 *** New emacsclient argument -q/--quiet suppresses some status messages.
167 *** New emacsclient argument --frame-parameters specifies the frame
168 parameters of any newly-created graphical frame.
170 *** If emacsclient shuts down due to Emacs signaling an error,
171 its exit status is 1.
173 *** New emacsclient argument --parent-id ID.
174 This opens a client frame in parent X window ID, via XEmbed, similar
175 to the --parent-id argument to Emacs.
177 ** Internationalization changes
179 *** Emacs now supports display and editing of bidirectional text.
180 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
181 displayed in the correct visual order as expected by users of those
182 scripts. The display reordering is a "full bidirectionality" class
183 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
184 with no RTL text should look exactly the same as before.
186 **** New buffer-local variable `bidi-display-reordering'.
187 To disable display reordering in a buffer, change this to nil.
189 **** New buffer-local variable `bidi-paragraph-direction'.
190 If nil (the default), Emacs determines the base direction of each
191 paragraph from its text, as specified by the UBA. Setting the value
192 to `right-to-left' or `left-to-right' forces a base direction on each
195 Paragraphs with right-to-left base direction are displayed starting at
196 the right window edge.
198 *** Enhanced support for characters with no glyphs in available fonts,
199 or, on text terminals, characters that cannot be encoded by the
200 terminal coding system. The new option `glyphless-char-display-control'
201 specifies how to display them: as a hexadecimal code in a box, a thin
202 1-pixel space, an empty box, etc.
204 *** New input methods: farsi, farsi-translit, bulgarian-alt-phonetic.
206 *** `nobreak-char-display' now also highlights Unicode hyphen chars
209 *** New Hebrew translation of the Emacs Tutorial.
210 Type `C-u C-h t' to choose it in case your language setup doesn't
211 automatically select it.
213 ** An Emacs Lisp package manager is now included.
214 This is a convenient way to download and install additional packages,
215 from a package repository at http://elpa.gnu.org.
217 *** M-x list-packages shows a list of packages, which can be
218 selected for installation.
220 *** New command `describe-package', bound to `C-h P'.
222 *** By default, all installed packages are loaded automatically when
223 Emacs starts up. To disable this, set `package-enable-at-startup' to
224 nil. To specify the packages to load, customize `package-load-list'.
226 ** Custom theme changes
228 *** New command `M-x customize-themes', which provides a convenient
229 interface for enabling and disabling Custom themes.
231 *** New option `custom-theme-load-path' is the load path for themes.
232 Emacs no longer looks for Custom themes in `load-path'. The default
233 value of `custom-theme-load-path' says to look for themes in
234 `custom-theme-directory', followed by a subdirectory of
235 `data-directory' named "themes/", which contains a small selection of
236 built-in Custom themes.
238 *** New option `custom-safe-themes' records known-safe theme files.
239 If a theme is not in this list, Emacs queries before loading it, and
240 offers to save the theme to `custom-safe-themes' automatically. By
241 default, all themes included in Emacs are treated as safe.
243 ** Improved GTK integration
245 *** GTK scroll-bars are now placed on the right by default.
246 The function `set-scroll-bar-mode' can change this.
248 *** GTK tool bars can have just text, just images or images and text.
249 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
250 the default is taken from desktop settings.
252 *** GTK tool bars can be placed on any edge of the frame.
253 The frame-parameter tool-bar-position controls this. It takes the
254 values top, left, right or bottom. The Options => Show/Hide menu has
257 *** The default colors for selected text (the `region' face) are taken
258 from the GTK theme when Emacs is built with GTK.
260 *** Emacs uses GTK tooltips by default if built with GTK.
261 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
263 ** Graphical interface changes
265 *** On graphical displays, the mode-line no longer ends in dashes.
266 Also, the first dash (which does not indicate anything) is just
267 displayed as a space.
269 *** `menu-bar-select-buffer-function' lets you choose another operation
270 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
272 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
273 built with Xft. These fonts can be set via X resources, for example:
274 Emacs.pane.menubar.font: Courier-12
278 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
279 or if it receives a SIGINT signal in batch mode.
281 *** `kill-emacs-hook' is now also run in batch mode.
282 Third-party code which adds to `kill-emacs-hook' should check if they
283 do the right thing in batch mode.
287 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
288 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
289 of buffer at first key-press (instead they move to top/bottom of buffer)
290 when `scroll-error-top-bottom' is non-nil.
292 *** New option `scroll-error-top-bottom' (see above).
294 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
295 scroll a line instead of full screen.
297 *** New property `scroll-command' should be set on a command's symbol to
298 define it as a scroll command affected by `scroll-preserve-screen-position'.
300 *** If you customize `scroll-conservatively' to a value greater than 100,
301 Emacs will never recenter point in the window when it scrolls due to
302 cursor motion commands or commands that move point (e.f., `M-g M-g').
303 Previously, you needed to use `most-positive-fixnum' as the value of
304 `scroll-conservatively' to achieve the same effect.
306 *** "Aggressive" scrolling now honors the scroll margins.
307 If you customize `scroll-up-aggressively' or
308 `scroll-down-aggressively' and move point off the window, Emacs now
309 scrolls the window so as to avoid positioning point inside the scroll
312 ** Basic SELinux support has been added.
313 This requires Emacs to be linked with libselinux at build time.
315 *** Emacs preserves the SELinux file context when backing up.
316 Also, the function `copy-file' has an extra optional argument for
317 preserving SELinux context, and the return value of `backup-buffer'
318 now includes the SELinux context.
320 *** New functions `file-selinux-context' and `set-file-selinux-context'
321 get and set the SELinux context of a file.
325 *** `delete-by-moving-to-trash' now only affects commands that specify
326 trashing. This avoids inadvertently trashing temporary files.
328 *** Calling `delete-file' or `delete-directory' with a prefix argument
329 now forces true deletion, regardless of `delete-by-moving-to-trash'.
331 ** File- and directory-local variable changes
333 *** You can stop directory local vars from applying to subdirectories.
334 Add an element (subdirs . nil) to the alist portion of any variables
335 settings to indicate that the section should not apply to
338 *** Directory local variables can apply to some file-less buffers.
339 Affected modes include dired, vc-dir, and log-edit. For example,
340 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
341 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
342 `hack-dir-local-variables-non-file-buffer' to support this.
344 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
345 Instead, use "eval: (minor-mode 1)".
347 *** The variable `inhibit-first-line-modes-regexps' has been renamed
348 to `inhibit-local-variables-regexps'. As the name suggests, it now
349 applies to ALL file local variables, not just -*- lines. The
350 associated `inhibit-first-line-modes-suffixes' has been renamed in the
355 *** The `quit-window' command now restores the last buffer displayed
356 in the quitted window.
358 *** Resizing an Emacs frame now preserves proportional window sizes,
359 modulo restrictions like window minimum sizes and fixed-size windows.
361 *** The behavior of `display-buffer' is now customizable in detail.
363 **** New option `display-buffer-base-action' specifies a list of
364 user-determined display "actions" (functions and optional arguments
365 for choosing the displaying window).
367 This takes precedence over the default display action, which is
368 specified by `display-buffer-fallback-action'.
370 **** New option `display-buffer-alist' maps buffer name regexps to
371 display actions, taking precedence over `display-buffer-base-action'.
373 *** New option `window-combination-limit'.
374 The new option `window-combination-limit' allows to return the space
375 obtained for resizing or creating a window more reliably to the window
376 from which such space was obtained.
378 *** New option `window-combination-resize'.
379 The new option `window-combination-resize' allows to split a window that
380 otherwise cannot be split because it's too small by stealing space from
381 other windows in the same combination. Subsequent resizing or deletion
382 of the window will resize all windows in the same combination as well.
384 *** New option `frame-auto-hide-function' lets you choose between
385 iconifying or deleting a frame when burying a buffer in a dedicated
386 frame, or quitting a window showing a buffer in a frame of its own.
388 *** New commands `maximize-window' and `minimize-window'.
389 These maximize and minimize the size of a window within its frame.
391 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
392 These functions allow to navigate through the live buffers that have
393 been shown in a specific window.
395 ** Minibuffer changes
397 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
398 This is handy for minibuffer-only frames, and is also used for the feature
399 where mouse-1 pops up *Messages*"', which can now easily be changed.
401 *** Minibuffers set `truncate-lines' to nil.
402 If you want to change the value to something else, you could use
403 for example `minibuffer-setup-hook'.
405 ** `auto-mode-case-fold' is now enabled by default.
407 ** `backup-by-copying-when-mismatch' now defaults to t.
409 ** New basic faces `error', `warning', `success'.
410 These are used to highlight text indicating failure, caution or
411 successful operation.
413 ** New option `list-colors-sort' defines the color sort order
414 for `list-colors-display'.
416 ** The variable `focus-follows-mouse' now always defaults to nil.
419 * Editing Changes in Emacs 24.1
423 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
426 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
429 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
431 ** New commands `count-words-region' and `count-words'.
433 *** M-= is bound to `count-words-region', not `count-lines-region'.
434 The `count-words-region' command, when called interactively, reports
435 the number of lines, words, and characters in the region. It is a
436 superset of the old `count-lines-region', which is now an obsolete
439 ** The command `just-one-space' (M-SPC), if given a negative argument,
440 also deletes newlines around point.
444 *** New option `delete-active-region'.
445 If non-nil, [delete] and DEL delete the region if it is active and no
446 prefix argument is given. If set to `kill', those commands kill
449 *** New command `delete-forward-char', bound to [delete].
450 This is meant for interactive use, and obeys `delete-active-region'.
451 The command `delete-char' does not obey `delete-active-region'.
453 *** `delete-backward-char' is now a Lisp function.
454 Apart from obeying `delete-active-region', its behavior is unchanged.
455 However, the byte compiler now warns if it is called from Lisp; Lisp
456 callers should use delete-char with a negative argument instead.
458 *** The option `mouse-region-delete-keys' has been deleted.
460 ** Selection changes.
462 The default handling of clipboard and primary selections has been
463 changed to conform with modern X applications. In short, most
464 commands for killing and yanking text now use the clipboard, while
465 mouse commands use the primary selection.
467 In the following, we provide a list of these changes, followed by a
468 list of steps to get the old behavior back if you prefer that.
470 *** `select-active-regions' now defaults to t.
471 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
472 the kill ring. The selected text is put in the primary selection, if
473 the system possesses a separate primary selection facility (e.g. X).
475 **** `select-active-regions' also accepts a new value, `only'.
476 This means to only set the primary selection for temporarily active
477 regions (usually made by mouse-dragging or shift-selection);
478 "ordinary" active regions, such as those made with C-SPC followed by
479 point motion, do not alter the primary selection.
481 **** `mouse-drag-copy-region' now defaults to nil.
483 *** mouse-2 is now bound to `mouse-yank-primary'.
484 This pastes from the primary selection, ignoring the kill-ring.
485 Previously, mouse-2 was bound to `mouse-yank-at-click'.
487 *** `x-select-enable-clipboard' now defaults to t on all platforms.
489 *** `x-select-enable-primary' now defaults to nil.
490 Thus, commands that kill text or copy it to the kill-ring (such as
491 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
493 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
494 exactly equivalent to M-w, C-w, and C-y respectively.
496 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
497 non-nil by default, as Windows does not support the primary selection
498 between applications.
500 *** To return to the previous behavior, do the following:
502 **** Change `select-active-regions' to nil.
503 **** Change `mouse-drag-copy-region' to t.
504 **** Change `x-select-enable-primary' to t (on X only).
505 **** Change `x-select-enable-clipboard' to nil.
506 **** Bind `mouse-yank-at-click' to mouse-2.
508 *** Support for X cut buffers has been removed.
510 *** X clipboard managers are now supported.
511 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
513 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
514 in the current rectangle. With a prefix argument, this prompts for a
515 number to count from and for a format string.
517 ** `redisplay-dont-pause' now defaults to t.
518 This makes Emacs feel more responsive to editing commands that arrive
519 at high rate, e.g. if you lean on some key, because stopping redisplay
520 in the middle (when this variable is nil) forces more expensive
521 updates later on, and Emacs appears to be unable to keep up.
523 ** The behavior of <TAB> for active regions in Text mode has changed.
524 In Text and related modes, typing <TAB> (`indent-for-tab-command')
525 when the region is active causes Emacs to indent all the lines in the
526 region, aligning them with the line previous to the first line in the
527 region (or with the left margin if there is no previous line).
529 ** When `occur' is called with a prefix argument, matching strings are
530 collected into the `*Occur*' buffer without line numbers. If there
531 are parenthesized subexpressions in the specified regexp, `occur'
532 reads replacement text that may contain \\& and \\N whose convention
533 follows `replace-match'.
536 * Changes in Specialized Modes and Packages in Emacs 24.1
538 ** Archive Mode has basic support for browsing and updating 7z archives.
542 *** BibTeX mode now supports biblatex.
543 Use the variable `bibtex-dialect' to select different BibTeX dialects.
544 `bibtex-entry-field-alist' is now an obsolete alias for
545 `bibtex-BibTeX-entry-alist'.
547 *** New command `bibtex-search-entries', bound to C-c C-a.
549 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
551 *** New variable `bibtex-search-entry-globally'.
555 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
557 *** The default browser used by the package is now the "xdg-open" program,
558 on platforms that support it. This calls your desktop's preferred browser.
560 ** Calendar, Diary, and Appt
562 *** Diary entries can contain non-printing "comments".
563 See the variable `diary-comment-start'.
565 *** Appointments can specify their individual warning times.
566 See the variable `appt-warning-time-regexp'.
568 *** The function specified by `appt-disp-window-function' may be passed
569 lists of arguments if multiple appointments are due at similar times.
570 If you are using a custom function for this, you should update it.
572 *** New function `diary-hebrew-birthday'.
574 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
575 may no longer be nil, but must all be strings.
577 *** The obsolete (since Emacs 22.1) method of enabling the appt
578 package by adding `appt-make-list' to `diary-hook' has been removed.
579 Use `appt-activate' instead.
581 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
582 appt-issue-message (use the function appt-activate)
583 appt-visible/appt-msg-window (use the variable appt-display-format)
585 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
586 view-diary-entries, list-diary-entries, show-all-diary-entries
590 *** New feature to "guess" the style in an existing buffer.
591 The main entry point is M-x c-guess.
593 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
595 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
596 Thus C-M-a will, by default, go to the beginning of the immediate function,
599 *** "Macros with semicolons" can be registered for correct indentation.
600 Where such a macro ends a line (no semicolon) the next statement is no longer
601 parsed as a statement continuation.
603 ** Comint and modes derived from it use the standard completion code.
607 *** Compilation mode can be used without Font Lock mode.
608 `compilation-parse-errors-function' is now obsolete.
610 *** New variable `compilation-filter-start', which is bound while
611 `compilation-filter-hook' runs. It records the start position of the
612 text inserted by `compilation-filter'.
614 *** `compilation-error-screen-columns' and `compilation-first-column'
615 are obeyed in the editing buffer. So programming language modes can
616 set them, whereas previously only the value in the *Compilation*
621 *** Customize buffers now contain a search field.
622 The search is performed using `customize-apropos'.
623 To turn off the search field, set `custom-search-field' to nil.
625 *** Custom options now start out hidden if at their default values.
626 Use the arrow to the left of the option name to toggle visibility.
628 *** custom-buffer-sort-alphabetically now defaults to t.
630 *** The color widget now has a "Choose" button, which allows you to
631 choose a color via `list-colors-display'.
635 *** It is now possible to access buses other than the default system
638 *** The `dbus-register-method' and `dbus-register-property' functions
639 optionally do not register names.
641 *** The new function `dbus-register-service' registers a known service
642 name on a D-Bus without also registering a property or a method.
646 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
647 if called with a prefix argument, read a file name from the minibuffer
648 instead of using the current buffer.
650 *** The "dired local variables" feature of Dired-x is obsolete.
651 The standard directory local variables feature replaces it.
655 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
656 controlling attempts to autojoin a channel.
658 *** New variable `erc-coding-system-precedence': If we use `undecided'
659 as the server coding system, this variable will then be consulted.
660 The default is to decode strings that can be decoded as utf-8 as
661 utf-8, and do the normal `undecided' decoding for the rest.
665 *** The default value of `eshell-directory-name' has changed
666 to be an "eshell" directory in `user-emacs-directory'.
667 The old "~/.eshell/" directory is still used if it exists, though.
671 *** The M-x gdb command now uses the GDB Machine Interface protocol.
672 It now supports multithread non-stop debugging and simultaneous
673 debugging of several threads.
677 *** RET (`image-toggle-animation') toggles animation, if applicable.
678 Animation plays once, unless the option `image-animate-loop' is non-nil.
682 *** New command M-x info-display-manual displays a named Info manual.
683 If that manual is already visited in some Info buffer, it displays
684 that buffer. (This is handy if you have many manuals in many *info*
685 buffers, and don't remember the name of the buffer visiting the manual
686 you want to consult.) Otherwise, it loads and displays the manual.
688 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
689 This is for compatibility with the stand-alone Info reader program,
690 and also because `Info-edit' is a rarely used command that is disabled
693 ** Mail mode changes (not Message mode)
695 *** New command M-x mail-add-attachment for adding MIME attachments
697 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
698 (Its name is misleading, since it has nothing to do with MIME
699 attachments.) The old name is now an obsolete alias to the new name.
701 ** MH-E has been upgraded to MH-E version 8.3.1.
702 See MH-E-NEWS for details.
704 ** Modula-2 mode provides auto-indentation.
706 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
708 ** nXML mode no longer binds C-RET to `nxml-complete'.
709 Completion is now performed via `completion-at-point', bound to C-M-i
710 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
711 default), this performs tag completion.
713 ** Prolog mode has been completely revamped, with lots of additional
714 functionality such as more intelligent indentation, electricity,
715 support for more variants, including Mercury, and a lot more.
719 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
720 in the Rmail incoming message.
722 *** The variable `rmail-message-filter' no longer has any effect.
723 This change was made in Emacs 23.1 but was not advertised at the time.
724 Try using `rmail-show-message-hook' instead.
728 *** M-x shell prompts for the shell path name if the default directory
729 is a remote file name and neither the environment variable $ESHELL nor
730 the variable `explicit-shell-file-name' is set.
732 *** TAB is now bound to the standard `completion-at-point' command,
733 which now implements the pcomplete rules for shell command completion.
737 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
738 if the mail server supports them. This uses either built-in GnuTLS
739 support, or the starttls.el library. Customize `smtpmail-stream-type'
742 *** The variable `smtpmail-auth-credentials' has been removed.
743 By default, the information is now stored in the file ~/.authinfo.
744 This was the default value of smtpmail-auth-credentials. If you had
745 customized smtpmail-auth-credentials to a list of user names and
746 passwords, those settings are not used. During your first connection
747 to the smtp server, Emacs will prompt for the user name and password,
748 and offer to save them to ~/.authinfo. Or you can manually copy the
749 credentials to ~/.authinfo. For example, if you had
751 (setq smtpmail-auth-credentials
752 '(("mail.example.org" 25 "jim" "s!cret")))
754 then the equivalent line in ~/.authinfo would be
756 machine mail.example.org port 25 login jim password s!cret
758 See the auth-source manual for more information, e.g. on encrypting
759 the credentials file.
761 *** The variable `smtpmail-starttls-credentials' has been removed.
762 If you had that set, you need to put
764 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
766 in your ~/.authinfo file instead.
770 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
771 and `sql-oracle-scan-on'.
773 *** New options controlling prompting for login parameters.
774 Each supported product has a custom variable `sql-*-login-params',
775 which is a list of the parameters to be prompted for before a
776 connection is established.
778 *** The command `sql-product-interactive' now takes a prefix argument,
779 which causes it to prompt for an SQL product.
781 *** Product-specific SQL interactive commands now take prefix arguments.
782 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
783 given a prefix argument, prompt for a name for the SQL interactive
784 buffer. This reduces the need for calling `sql-rename-buffer'.
786 *** SQL interactive modes suppress command continuation prompts, and
787 replace tabs with spaces. The first change impacts multiple line SQL
788 statements entered with C-j between each line, statements yanked into
789 the buffer and statements sent with `sql-send-*' functions. The
790 second prevents the MySQL and Postgres interpreters from listing
791 object name completions when sent text via `sql-send-*' functions.
793 *** New command `sql-connect' starts a predefined SQLi session,
794 using the login parameters from `sql-connection-alist'.
796 *** New "Save Connection" menu item in SQLi buffers.
797 This gathers the login params specified for the SQLi session, if it
798 was not started by a connection, and saves them as a new connection.
800 *** New commands for listing database objects and details:
801 sql-list-all and sql-list-table.
803 *** An API for manipulating SQL product definitions has been added.
807 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
811 *** New inline access method "ksu" (kerberized su).
813 *** The following access methods are discontinued: "ssh1_old",
814 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
816 *** The user option `remote-file-name-inhibit-cache' controls whether
817 remote file attributes are cached for better performance.
819 *** The option `ange-ftp-binary-file-name-regexp' has changed its
822 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
823 for remote machines which support SELinux.
825 ** New function `url-queue-retrieve', which behaves like url-retrieve,
826 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
827 the degree of parallelism.
829 ** VC and related modes
831 *** Support for pulling on distributed version control systems.
832 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
833 supported (currently with Bzr, Git, and Mercurial), to update the
834 current branch and working tree. A prefix argument means to prompt
835 the user for specifics, e.g. a pull location.
837 *** `vc-update' is now an alias for `vc-pull'.
839 *** Support for merging on distributed version control systems.
840 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
841 is supported (currently with Bzr, Git, and Mercurial), to merge
842 changes from another branch into the current one. It prompts for
843 specifics, e.g. a merge source.
845 *** New option `vc-revert-show-diff' controls whether `vc-revert'
846 shows a diff while querying the user. It defaults to t.
848 *** Log entries in some Log View buffers can be toggled to display a
849 longer description by typing RET (log-view-toggle-entry-display).
850 This is currently supported for Bzr, Git, and Mercurial (to support
851 another backend, define a `log-view-expanded-log-entry-function').
852 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
853 use this to display the full log entry for the revision at point.
855 *** New command `vc-ediff' allows visual comparison of two revisions
856 of a file similar to `vc-diff', but using ediff backend.
858 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
859 this was not advertised at the time.
861 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
862 Since Emacs 23, it has done the same thing as `toggle-read-only', but
863 this was not advertised at the time.
869 *** erc-hecomplete.el (use erc-pcomplete.el instead)
871 *** partial-completion-mode (complete.el) is obsolete.
872 You can get a comparable behavior with:
873 (setq completion-styles '(partial-completion initials))
874 (setq completion-pcm-complete-word-inserts-delimiters t)
876 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
878 *** pgg is obsolete (use EasyPG instead).
880 *** sregex.el is obsolete, since rx.el is a strict superset.
882 *** s-region.el and pc-select.el are obsolete.
883 They are superseded by shift-select-mode, enabled by default since 23.1.
885 *** vc-mcvs.el is obsolete (for lack of a maintainer).
889 *** The Landmark game is now invoked with `landmark', not `lm'.
890 Its functions and variables have been similarly renamed.
892 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
893 (This interfered with cua-mode.)
895 *** f90.el has some support for Fortran 2008 syntax.
897 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
899 *** New command `nato-region' converts text to NATO phonetic alphabet.
902 * New Modes and Packages in Emacs 24.1
904 ** Occur Edit mode applies edits made in *Occur* buffers to the
905 original buffers. It is bound to "e" in Occur mode.
907 ** New global minor mode electric-pair-mode.
908 When enabled, typing an open parenthesis automatically inserts the
909 matching closing one.
911 ** New global minor mode electric-indent-mode.
912 When enabled, typing certain characters triggers reindentation.
913 Major modes wishing to use this can set electric-indent-chars or
914 electric-indent-functions.
916 ** New global minor mode electric-layout-mode.
917 When enabled, typing certain characters automatically inserts newlines.
918 Major modes wishing to use this can set electric-layout-rules.
920 ** tabulated-list.el provides a generic major mode for tabulated data,
921 from which other modes can be derived.
923 ** pcase.el provides the ML-style pattern matching macro `pcase'.
925 ** secrets.el is an implementation of the Secret Service API, an
926 interface to password managers like GNOME Keyring or KDE Wallet. The
927 Secret Service API requires D-Bus for communication. The command
928 `secrets-show-secrets' offers a buffer with a visualization of the
931 ** notifications.el provides an implementation of the Desktop
932 Notifications API. It requires D-Bus for communication.
934 ** soap-client.el supports access to SOAP web services from Emacs.
935 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
937 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
939 ** New emacs-lock.el package.
940 The previous version has been moved to obsolete/old-emacs-lock.el.
941 Now, there is a proper minor mode `emacs-lock-mode'. Protection
942 against exiting Emacs and killing the buffer can be set separately.
943 The mechanism for automatically turning off protection for buffers
944 with dead inferior processes has been generalized.
947 * Incompatible Lisp Changes in Emacs 24.1
949 ** Passing a nil argument to a minor mode function call now ENABLES
950 the minor mode unconditionally. This is so that you can write e.g.
952 (add-hook 'text-mode-hook 'foo-mode)
954 to enable foo-mode in Text mode buffers, removing the need for
955 `turn-on-foo-mode' style functions. This affects all mode commands
956 defined by `define-minor-mode'. If called interactively, the mode
957 command still toggles the minor mode.
959 ** The return value of `backup-buffer' has changed.
960 It is now a list of three elements, where the second element is a list
961 describing the original file's SELinux context. If Emacs or the
962 system lacks SELinux support, the context list is (nil nil nil nil).
963 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
965 ** `char-direction-table' and the `char-direction' function were deleted.
966 They were buggy and inferior to the new support of bidirectional
967 editing introduced in Emacs 24. If you need the bidirectional
968 properties of a character, use `get-char-code-property' with the last
969 argument `bidi-class'.
971 ** `copy-directory' now copies the source directory as a subdirectory
972 of the target directory, if the latter is an existing directory. The
973 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
974 the contents directly into a pre-existing target directory.
976 ** For mouse click input events in the text area, the Y pixel
977 coordinate in the POSITION list now counts from the top of the text
978 area, excluding any header line. Previously, it counted from the top
981 ** Support for "old-style" backquotes, obsolete for 10+ years, has
982 been further reduced. Now a backquote not followed by a space is
983 always treated as a "new-style" backquote. Please remove all
984 "old-style" backquotes from your code. If your code uses backquotes
985 as documented in the Elisp manual, and compiles without warning, then
986 you have nothing to do in this regard. Code not following the
987 appropriate conventions may fail to compile.
989 The most common cause of trouble seems to be an old-style backquote
990 followed by a newline. Another cause of trouble is vector notation
991 for key sequence notation: instead of [(control ,)] and [(control ')],
992 you should write [(control ?,)] and [(control ?')], which will work in
995 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
996 was not advertised at the time. The function `custom-initialize-delay'
997 replaced all known uses.
999 ** `view-buffer' now treats special mode-class in the same way that
1000 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
1001 major mode is special).
1003 ** Menu and tool bar changes
1005 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
1006 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
1007 With these alist entries omitted, `make-frame' checks the value of the
1008 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
1009 a menu-bar or tool-bar, respectively. If the alist entries are added,
1010 they override the value of `menu-bar-mode'/`tool-bar-mode'.
1012 *** The menu bar bindings's caches are not used any more.
1013 Use (where-is-internal <def> nil t) instead.
1015 ** Regions created by mouse dragging are now normal active regions,
1016 similar to those created by shift-selection (see Selection changes
1017 above). In previous Emacs versions, these regions were delineated by
1018 `mouse-drag-overlay'; that variable has been removed.
1020 ** The fourth argument of `filter-buffer-substring' has been removed.
1021 If you want to remove text properties from the final result, simply
1022 pass the result through substring-no-properties.
1024 ** cl.el no longer provides `cl-19'.
1026 ** The following obsolete functions and aliases have been removed
1027 (the appropriate new function is given in parentheses; "not needed"
1028 means you can just remove all calls to the function in question):
1030 *** `comint-kill-output' (`comint-delete-output')
1031 *** `decompose-composite-char' (`char-to-string')
1032 *** `outline-visible' (`outline-invisible-p')
1033 *** `internal-find-face' (`facep')
1034 *** `internal-get-face' (`facep and check-face')
1035 *** `frame-update-faces' (not needed)
1036 *** `frame-update-face-colors' (`frame-set-background-mode')
1037 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
1038 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
1039 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
1040 *** `x-make-font-bold-italic' (`make-face-bold-italic')
1041 *** `x-make-font-unbold' (`make-face-unbold')
1042 *** `x-make-font-unitalic' (`make-face-unitalic')
1043 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
1044 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
1045 *** `iswitchb-default-keybindings' (`iswitchb-mode')
1046 *** `char-bytes' (== 1)
1047 *** `isearch-return-char' (`isearch-printing-char')
1048 *** `make-local-hook' (not needed)
1049 *** `set-screen-height' (`set-frame-height')
1050 *** `set-screen-width' (`set-frame-width')
1052 ** The following obsolete variables and varaliases have been removed
1053 (the appropriate new variable is given in parentheses):
1055 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
1056 *** `vc-header-alist' (`vc-BACKEND-header')
1057 *** `directory-sep-char' (== ?/)
1058 *** `font-lock-defaults-alist' (`font-lock-defaults')
1059 *** `e' (`float-e').
1061 ** The following obsolete files were removed:
1062 sc.el, x-menu.el, rnews.el, rnewspost.el
1064 ** The format of the finder-inf.el file has changed, since the Finder
1065 mechanism is now based on the package system. The variable
1066 `finder-package-info' is replaced by `package--builtins' and
1067 `finder-keywords-hash'.
1069 ** When generating autoloads, `update-directory-autoloads' no longer
1070 assumes every inspected file is in your `load-path'. It instead
1071 generates relative names according to the current `load-path'.
1074 * Lisp changes in Emacs 24.1
1076 ** Code can now use lexical scoping by default instead of dynamic scoping.
1077 The `lexical-binding' variable enables lexical scoping for local
1078 variables. It is typically set via a file-local variable in the first
1079 line of the file, in which case it applies to all the code in that
1082 *** `eval' takes a new optional argument `lexical' to choose the new lexical
1083 binding instead of the old dynamic binding mode.
1085 *** Lexically scoped interpreted functions are represented with a new form
1086 of function value which looks like (closure ENV ARGS &rest BODY).
1088 *** New macro `letrec' to define recursive local functions.
1090 *** `defvar' and `defconst' now mark the variable as special (dynamic).
1091 So do `defcustom' and other forms that call `defvar' as a subroutine.
1093 *** New function `special-variable-p' to check whether a variable is
1094 declared as dynamically bound.
1096 ** An Emacs Lisp testing tool is now included.
1097 Emacs Lisp developers can use this tool to write automated tests for
1098 their code. See the ERT info manual for details.
1100 ** Changes for bidirectional display and editing
1102 *** New function `current-bidi-paragraph-direction'.
1103 This returns the base direction of the paragraph at point.
1105 *** New function `bidi-string-mark-left-to-right'.
1106 Given a string containing characters from right-to-left scripts, this
1107 function returns another string which can be safely inserted into a
1108 buffer, such that any following text will be always displayed to the
1109 right of that string. (This works by appending an invisible Unicode
1110 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
1112 This is useful when the buffer has overall left-to-right paragraph
1113 direction and you need to insert a string whose contents are not known
1114 in advance, without disrupting the layout of the line.
1118 *** Window tree functions are accessible in Elisp.
1119 Functions are provided to return the parent, siblings or child windows
1120 of any window including internal windows (windows not associated with a
1121 buffer) in the window tree.
1123 **** New function `window-valid-p' gives non-nil for live and internal
1126 **** Window manipulation can deal with internal windows.
1127 Many window handling functions like `split-window', `delete-window', or
1128 `delete-other-windows' as well as the window resizing functions can now
1129 act on any window including internal ones.
1131 *** window-total-height/-width vs window-body-height/-width.
1132 The function `window-height' has been renamed to `window-total-height'
1133 and `window-width' has been renamed to `window-body-width'. The old
1134 names are provided as aliases. Two new functions `window-total-width'
1135 and `window-body-height' are provided.
1137 *** Window parameters specific to window handling functions.
1138 For each window you can specify a parameter to override the default
1139 behavior of a number of functions like `split-window', `delete-window'
1140 and `delete-other-windows'. The variable `ignore-window-parameters'
1141 allows to ignore processing such parameters.
1143 *** New semantics of third argument of `split-window'.
1144 The third argument of `split-window' has been renamed to SIDE and can be
1145 set to any of the values 'below, 'right, 'above, or 'left to make the
1146 new window appear on the corresponding side of the window that shall be
1147 split. Any other value of SIDE will cause `split-window' to split the
1148 window into two side-by-side windows as before.
1150 *** Window resizing functions.
1151 A new standard function for resizing windows called `window-resize' has
1152 been introduced. This and all other functions for resizing windows no
1153 longer delete any windows when they become too small.
1155 *** Deleting the selected window now selects the most recently selected
1156 live window on that frame instead.
1158 *** `adjust-window-trailing-edge' adjustments.
1159 `adjust-window-trailing-edge' can now deal with fixed-size windows and
1160 is able to resize other windows if a window adjacent to the trailing
1161 edge cannot be shrunk any more. This makes its behavior more similar to
1162 that of Emacs 21 without compromising, however, its inability to delete
1163 windows which was introduced in Emacs 22.
1165 *** Window-local buffer lists.
1166 Windows now have local buffer lists. This means that removing a buffer
1167 from display in a window will preferably show the buffer previously
1168 shown in that window with its previous window-start and window-point
1169 positions. This also means that the same buffer may be automatically
1170 shown twice even if it already appears in another window.
1172 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
1173 which if non-nil requires the buffer to be displayed in the currently
1174 selected window, signaling an error otherwise. If nil, another window
1175 can be used, e.g. if the selected one is strongly dedicated.
1177 *** `split-window-vertically' and `split-window-horizontally' renamed
1178 to `split-window-below' and `split-window-right' respectively.
1179 The old names are kept as aliases.
1183 **** The second arg to `display-buffer' and `pop-to-buffer' is now
1184 named ACTION, and takes a display action of the same form as
1185 `display-buffer-base-action' (see Changes, above). A non-nil,
1186 non-list value is treated specially, as the old meaning.
1188 **** New variable `display-buffer-overriding-action'.
1190 **** The procedure of `display-buffer' etc. to choose a window is
1191 determined by combining `display-buffer-overriding-action',
1192 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
1193 and `display-buffer-fallback-action'. The second and fourth of these
1194 are user-customizable variables.
1196 See the docstring of `display-buffer' for details.
1198 *** New functions `window-state-get' and `window-state-put'.
1199 These functions allow to save and restore the state of an arbitrary
1200 frame or window as an Elisp object.
1204 *** New variable `completion-extra-properties' used to specify extra
1205 properties of the current completion:
1206 - :annotate-function, same as the old completion-annotate-function.
1207 - :exit-function, function to call after completion took place.
1209 *** Functions on `completion-at-point-functions' can return any of the
1210 properties valid for `completion-extra-properties'.
1212 *** `completion-annotate-function' is obsolete.
1214 *** New `metadata' method for completion tables. The metadata thus returned
1215 can specify various details of the data returned by `all-completions':
1216 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
1217 used to select a style in completion-category-overrides.
1218 - `annotation-function' to add annotations in *Completions*.
1219 - `display-sort-function' to specify how to sort entries in *Completions*.
1220 - `cycle-sort-function' to specify how to sort entries when cycling.
1222 *** `minibuffer-local-filename-must-match-map' is not used any more.
1223 Instead, the bindings in `minibuffer-local-filename-completion-map'
1224 are combined with `minibuffer-local-must-match-map'.
1226 *** New variable `completing-read-function' allows overriding the
1227 behavior of `completing-read'.
1229 ** `glyphless-char-display' can now distinguish between graphical and
1230 text terminal display, via a char-table entry that is a cons cell.
1232 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
1233 Instead, the offending function is removed.
1237 *** New function `run-hook-wrapped' for running an abnormal hook by
1238 passing the hook functions as arguments to a "wrapping" function.
1239 Like `run-hook-with-args-until-success', it stops at the first
1240 non-nil return value.
1242 *** New macro `with-wrapper-hook' for running an abnormal hook as a
1243 set of "wrapping" filters, similar to around advice.
1244 (A version of this macro was actually added in Emacs 23.2 but was not
1245 advertised at the time.)
1249 *** New macro `condition-case-unless-debug' (this was actually added in
1250 Emacs 23.1 as condition-case-no-debug, but not advertised)
1252 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
1254 *** Variable `stack-trace-on-error' removed.
1256 *** The debugger can now "continue" from an error, which means it will
1257 jump to the error handler as if the debugger had not been invoked
1258 instead of jumping all the way to the top-level.
1260 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
1261 This can be useful when `inhibit-quit' is set.
1263 ** The new function `server-eval-at' allows evaluation of Lisp forms on
1264 named Emacs server instances.
1266 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
1267 to redirect STDOUT to a file.
1269 ** The function `format-time-string' now supports the %N directive,
1270 for higher-resolution time stamps.
1272 ** New input reading functions
1274 *** New function `read-char-choice' reads a restricted set of
1275 characters, discarding any inputs not inside the set.
1277 *** The command `read-color' now requires a match for a color name
1278 or RGB triplet, instead of signaling an error if the user provides
1281 **** `facemenu-read-color' is now an alias for `read-color'.
1283 ** `image-library-alist' is renamed to `dynamic-library-alist'.
1284 The variable is now used to load all kind of supported dynamic libraries,
1285 not just image libraries. The previous name is still available as an
1288 ** Syntax parsing changes
1290 *** New variable `syntax-propertize-function'.
1291 This replaces `font-lock-syntactic-keywords' which is now obsolete.
1292 This allows syntax-table properties to be set independently from font-lock:
1293 just call syntax-propertize to make sure the text is propertized.
1294 Together with this new variable come a new hook
1295 syntax-propertize-extend-region-functions, as well as two helper functions:
1296 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
1297 as-is; and syntax-propertize-rules which provides a new way to specify
1300 *** Syntax tables support a new "comment style c" additionally to style b.
1302 ** New hook `post-self-insert-hook', run after `self-insert-command'.
1304 ** frame-local variables cannot be let-bound any more.
1306 ** Major and minor mode changes
1308 *** `set-auto-mode' now respects mode: local variables at the end of files,
1309 as well as those in the -*- line.
1311 *** `prog-mode' is a new major mode from which programming modes
1314 **** `prog-mode-hook' can be used to enable features for programming
1315 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
1316 on-the-fly spell checking for comments and strings.
1318 *** New hook `change-major-mode-after-body-hook', run by
1319 `run-mode-hooks' just before any other mode hooks.
1321 *** Enabled globalized minor modes can be disabled in specific major modes.
1322 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
1323 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
1325 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
1327 ** File-handling changes
1329 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
1330 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
1331 both non-nil. Interactively, TRASH defaults to t, unless a prefix
1332 argument is supplied (see Trash changes, above).
1334 *** New file predicates: `file-equal-p', `file-in-directory-p'.
1336 ** Tool-bars can display separators.
1337 Tool-bar separators are handled like menu separators in menu-bar maps,
1338 i.e. via menu entries of the form `(menu-item "--")'.
1342 *** Animated images support (currently animated gifs only).
1344 **** `image-animated-p' returns non-nil if an image can be animated.
1346 **** `image-animate' animates a supplied image spec.
1348 **** `image-animate-timer' returns the timer object for an image that
1351 *** `image-extension-data' has been renamed to `image-metadata'.
1352 The old name is an obsolete alias to the new one.
1354 *** Image mode can view any image type that ImageMagick supports.
1355 This requires Emacs to be built with ImageMagick support.
1357 **** New function `imagemagick-types', defined if ImageMagick support
1358 is enabled, returns a list of image file extensions that your
1359 ImageMagick installation supports.
1361 **** New function `imagemagick-register-types' enables ImageMagick
1362 image types in Image mode and in `create-image' and other helper
1365 **** New option `imagemagick-types-inhibit' excludes certain
1366 ImageMagick image types from `imagemagick-register-types'.
1368 **** With ImageMagick support, there are extra Image mode commands to
1369 resize and rotate images: `image-transform-fit-to-height',
1370 `image-transform-fit-to-width', `image-transform-set-rotation', and
1371 `image-transform-set-scale'.
1373 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
1374 passes it to the mail user agent function. This argument specifies an
1375 action for returning to the caller after finishing with the mail. For
1376 example, this is used by Rmail to optionally delete a mail window.
1378 ** XML and HTML parsing
1379 If Emacs is compiled with libxml2 support, there are two new
1380 functions: `libxml-parse-html-region' (which parses "real world" HTML)
1381 and `libxml-parse-xml-region' (which parses XML). Both return an
1382 Emacs Lisp parse tree.
1384 ** Networking and encryption changes
1386 *** `open-network-stream' can now be used to open an encrypted stream.
1387 It now accepts an optional `:type' parameter for initiating a TLS
1388 connection, directly or via STARTTLS. To do STARTTLS, additional
1389 parameters (`:end-of-command', `:success', `:capabilities-command')
1390 must also be supplied.
1392 *** New library gnutls.el.
1393 The new function `gnutls-available-p' returns non-nil if Emacs is
1394 built with GnuTLS support. The main entry points are
1395 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
1396 these functions through `open-network-stream', because that can
1397 upgrade connections through STARTTLS opportunistically or use plain
1398 SSL, depending on your needs. For debugging, set `gnutls-log-level'
1401 *** New primitive `secure-hash' that supports many secure hash algorithms:
1402 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
1403 sha1.el has been removed. The `sha1' feature is provided by default.
1407 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
1409 ** Progress reporters can now "spin".
1410 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
1411 now be nil, or omitted. This makes a "non-numeric" reporter. Each
1412 time you call `progress-reporter-update' on that progress reporter,
1413 with a nil or omitted VALUE argument, the reporter message is
1414 displayed with a "spinning bar".
1416 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
1417 being reverted, even if the buffer has a local `revert-buffer-function'.
1419 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
1420 If delayed-warnings-list is non-nil, the command loop calls
1421 `delayed-warnings-hook' after `post-command-hook'. At present, this
1422 is only used by Emacs on some platforms to display warnings during
1423 startup, which might otherwise not be noticed. This uses the
1424 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
1426 ** rx.el has a new `group-n' construct for explicitly numbered groups.
1428 ** New function `make-composed-keymap' that constructs a new keymap
1429 from multiple input maps. You can use this to make a keymap that
1430 inherits from multiple maps, eg:
1431 (set-keymap-parent newmap (make-composed-keymap othermap parent))
1433 ** New function `string-prefix-p'.
1434 (This was actually added in Emacs 23.2 but was not advertised at the time.)
1436 ** New reader macro ## that stands for the empty symbol.
1437 This means that the empty symbol can now be read back. Also, #: by itself
1438 (when not immediately followed by a possible symbol character) stands for
1439 an empty uninterned symbol.
1441 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
1443 ** The following functions and variables are obsolete:
1445 *** `tooltip-use-echo-area' is obsolete.
1446 Rather than setting this to t, disable Tooltip mode instead.
1448 *** buffer-substring-filters is obsolete.
1449 Use `filter-buffer-substring-functions' instead.
1451 *** `byte-compile-disable-print-circle' is obsolete.
1453 *** `deferred-action-list' and `deferred-action-function' are obsolete.
1454 Use `post-command-hook' instead.
1456 *** `font-lock-maximum-size' is obsolete.
1459 * Changes in Emacs 24.1 on non-free operating systems
1461 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
1462 and also when HOME is set to C:\ by default.
1464 ** New configure.bat options
1466 *** --enable-checking builds Emacs with extra runtime checks.
1468 *** --distfiles specifies files to be included in binary distribution.
1470 *** --without-gnutls disables automatic GnuTLS detection.
1472 *** --lib for general library linkage, works with the USER_LIBS build variable.
1474 ** New make target `dist' to create binary distribution for MS Windows.
1476 ** The Lisp function `w32-default-color-map' is now obsolete.
1477 (It is only used internally in the Emacs C code.)
1479 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
1480 reappear on mouse-over. (Requires OS X 10.6 or later.)
1482 ** On Mac OS X, dragging a file into Emacs visits the file, like on
1483 other platforms, rather than inserting its contents into the buffer.
1486 ----------------------------------------------------------------------
1487 This file is part of GNU Emacs.
1489 GNU Emacs is free software: you can redistribute it and/or modify
1490 it under the terms of the GNU General Public License as published by
1491 the Free Software Foundation, either version 3 of the License, or
1492 (at your option) any later version.
1494 GNU Emacs is distributed in the hope that it will be useful,
1495 but WITHOUT ANY WARRANTY; without even the implied warranty of
1496 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1497 GNU General Public License for more details.
1499 You should have received a copy of the GNU General Public License
1500 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
1505 paragraph-separate: "[
\f]*$"