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 ** If your Emacs was built from a bzr checkout, the new variable
36 `emacs-bzr-version' contains information about which bzr revision was used.
39 * Editing Changes in Emacs 24.2
41 ** M-x move-to-column, if called interactively with no prefix arg, now
42 prompts for a column number.
44 ** `mouse-avoidance-banish-position' can now be used to customize
45 `mouse-avoidance-mode' further.
47 ** `C-M-f' and `C-M-b' will now move to the path name separator
48 character when doing minibuffer filename prompts.
51 * Changes in Specialized Modes and Packages in Emacs 24.2
53 ** which-function-mode now applies to all applicable major modes by default.
55 ** erc will look up server/channel names via auth-source and use the
56 channel keys found, if any.
58 ** The `server-auth-key' variable can be used to set a permanent
59 shared key for Emacs Server.
68 * New Modes and Packages in Emacs 24.2
70 * Incompatible Lisp Changes in Emacs 24.2
73 ** Docstrings starting with `*' no longer indicate user options.
74 Only variables defined using `defcustom' are considered user options.
75 The function `user-variable-p' is now an obsolete alias for
79 * Lisp changes in Emacs 24.2
81 * Changes in Emacs 24.2 on non-free operating systems
83 ** New configure.bat options on MS-Windows:
85 *** --without-libxml2 omits support for libxml2, even if its presence
89 * Installation Changes in Emacs 24.1
91 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
92 to configure. Note that other libraries used by Emacs, RSVG and GConf,
93 also depend on Gtk+. You can disable them with --without-rsvg and
96 ** Emacs can be compiled with GnuTLS support.
97 This happens by default if a suitably recent version of the library is
98 found at build time. To prevent this, use the configure option
99 `--without-gnutls'. See below for GnuTLS features.
101 ** Emacs can be compiled with SELinux support.
102 This happens by default if a suitably recent version of the library is
103 found at build time. To prevent this, use the configure option
104 `--without-selinux'. See below for SELinux features.
106 ** Emacs can be compiled with ImageMagick support.
107 This happens by default if a suitably recent version of the library is
108 found at build time. To prevent this, use the configure option
109 `--without-imagemagick'. See below for ImageMagick features.
110 This feature is not available for the Nextstep or MS ports.
112 ** Emacs can be compiled with libxml2 support.
113 This happens by default if a suitably recent version of the library is
114 found at build time. To prevent this, use the configure option
115 `--without-xml2'. See below for libxml2 features.
117 ** By default, the installed Info and man pages are compressed.
118 You can disable this by configuring --without-compress-info.
120 ** New configure option --with-wide-int.
121 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
122 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
125 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
126 These provide no new functionality, they just remove the need to edit
127 lib-src/Makefile by hand in order to use the associated features.
129 ** New configure option --enable-use-lisp-union-type.
130 This is only useful for Emacs developers to debug certain types of bugs.
131 This is not a new feature; only the configure flag is new.
133 ** The standalone programs digest-doc and sorted-doc are removed.
134 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
136 ** The standalone program `fakemail' is removed.
137 If you need it, feedmail.el provides a superset of the functionality.
140 * Startup Changes in Emacs 24.1
142 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
143 command line arguments, and the EMACS_UNIBYTE environment variable, no
144 longer have any effect. (They were declared obsolete in Emacs 23.)
146 ** New command line option `--no-site-lisp' removes site-lisp directories
147 from load-path. -Q now implies this. This option does not affect the
148 EMACSLOADPATH environment variable (and hence has no effect for
152 * Changes in Emacs 24.1
156 *** Many packages now use the `completion-at-point' command,
157 rather than implementing separate completion commands.
159 *** `completion-at-point' now handles tags and semantic completion.
161 *** Completion in a non-minibuffer now tries to detect the end of completion
162 and pops down the *Completions* buffer accordingly.
164 *** New option `completion-cycle-threshold' allows completion cycling.
166 *** New option `completion-category-overrides' for overriding the
167 default completion style in certain circumstances.
169 *** New completion style `substring'.
171 *** Completion of buffer names uses `substring' completion by default.
173 *** The option `widget-complete-field' has been removed.
177 *** The first time you try sending mail, Emacs asks for a mail method.
178 This is implemented by a new default for `send-mail-function', which
179 is `sendmail-query-once'. This offers to use the smtpmail package, or
180 to use the old defaults relying on external mail facilities
181 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
182 `mailclient-send-it' on Windows).
184 *** Typing C-c m in the buffer made by M-x report-emacs-bug transfers
185 the report to your desktop's preferred mail client, if there is one.
186 This uses either the "xdg-email" utility, or Mac OS's "open" command.
188 *** See Changes in Specialized Modes and Packages for SMTPmail changes
189 and Mail mode changes
191 ** Emacs server and client changes
193 *** New option `server-port' specifies the port for TCP Emacs servers.
195 *** New emacsclient argument -q/--quiet suppresses some status messages.
197 *** New emacsclient argument --frame-parameters specifies the frame
198 parameters of any newly-created graphical frame.
200 *** If emacsclient shuts down due to Emacs signaling an error,
201 its exit status is 1.
203 *** New emacsclient argument --parent-id ID.
204 This opens a client frame in parent X window ID, via XEmbed, similar
205 to the --parent-id argument to Emacs.
207 ** Internationalization changes
209 *** Emacs now supports display and editing of bidirectional text.
210 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
211 displayed in the correct visual order as expected by users of those
212 scripts. The display reordering is a "full bidirectionality" class
213 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
214 with no RTL text should look exactly the same as before.
216 **** New buffer-local variable `bidi-display-reordering'.
217 To disable display reordering in a buffer, change this to nil.
219 **** New buffer-local variable `bidi-paragraph-direction'.
220 If nil (the default), Emacs determines the base direction of each
221 paragraph from its text, as specified by the UBA. Setting the value
222 to `right-to-left' or `left-to-right' forces a base direction on each
225 Paragraphs with right-to-left base direction are displayed starting at
226 the right window edge.
228 *** Enhanced support for characters with no glyphs in available fonts,
229 or, on text terminals, characters that cannot be encoded by the
230 terminal coding system. The new option `glyphless-char-display-control'
231 specifies how to display them: as a hexadecimal code in a box, a thin
232 1-pixel space, an empty box, etc.
234 *** New input methods: farsi, farsi-translit, bulgarian-alt-phonetic.
236 *** `nobreak-char-display' now also highlights Unicode hyphen chars
239 *** New Hebrew translation of the Emacs Tutorial.
240 Type `C-u C-h t' to choose it in case your language setup doesn't
241 automatically select it.
243 ** An Emacs Lisp package manager is now included.
244 This is a convenient way to download and install additional packages,
245 from a package repository at http://elpa.gnu.org.
247 *** M-x list-packages shows a list of packages, which can be
248 selected for installation.
250 *** New command `describe-package', bound to `C-h P'.
252 *** By default, all installed packages are loaded automatically when
253 Emacs starts up. To disable this, set `package-enable-at-startup' to
254 nil. To specify the packages to load, customize `package-load-list'.
256 ** Custom theme changes
258 *** New command `M-x customize-themes', which provides a convenient
259 interface for enabling and disabling Custom themes.
261 *** New option `custom-theme-load-path' is the load path for themes.
262 Emacs no longer looks for Custom themes in `load-path'. The default
263 value of `custom-theme-load-path' says to look for themes in
264 `custom-theme-directory', followed by a subdirectory of
265 `data-directory' named "themes/", which contains a small selection of
266 built-in Custom themes.
268 *** New option `custom-safe-themes' records known-safe theme files.
269 If a theme is not in this list, Emacs queries before loading it, and
270 offers to save the theme to `custom-safe-themes' automatically. By
271 default, all themes included in Emacs are treated as safe.
273 ** Improved GTK integration
275 *** GTK scroll-bars are now placed on the right by default.
276 The function `set-scroll-bar-mode' can change this.
278 *** GTK tool bars can have just text, just images or images and text.
279 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
280 the default is taken from desktop settings.
282 *** GTK tool bars can be placed on any edge of the frame.
283 The frame-parameter tool-bar-position controls this. It takes the
284 values top, left, right or bottom. The Options => Show/Hide menu has
287 *** The default colors for selected text (the `region' face) are taken
288 from the GTK theme when Emacs is built with GTK.
290 *** Emacs uses GTK tooltips by default if built with GTK.
291 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
293 ** Graphical interface changes
295 *** On graphical displays, the mode-line no longer ends in dashes.
296 Also, the first dash (which does not indicate anything) is just
297 displayed as a space.
299 *** `menu-bar-select-buffer-function' lets you choose another operation
300 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
302 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
303 built with Xft. These fonts can be set via X resources, for example:
304 Emacs.pane.menubar.font: Courier-12
308 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
309 or if it receives a SIGINT signal in batch mode.
311 *** `kill-emacs-hook' is now also run in batch mode.
312 Third-party code which adds to `kill-emacs-hook' should check if they
313 do the right thing in batch mode.
317 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
318 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
319 of buffer at first key-press (instead they move to top/bottom of buffer)
320 when `scroll-error-top-bottom' is non-nil.
322 *** New option `scroll-error-top-bottom' (see above).
324 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
325 scroll a line instead of full screen.
327 *** New property `scroll-command' should be set on a command's symbol to
328 define it as a scroll command affected by `scroll-preserve-screen-position'.
330 *** If you customize `scroll-conservatively' to a value greater than 100,
331 Emacs will never recenter point in the window when it scrolls due to
332 cursor motion commands or commands that move point (e.f., `M-g M-g').
333 Previously, you needed to use `most-positive-fixnum' as the value of
334 `scroll-conservatively' to achieve the same effect.
336 *** "Aggressive" scrolling now honors the scroll margins.
337 If you customize `scroll-up-aggressively' or
338 `scroll-down-aggressively' and move point off the window, Emacs now
339 scrolls the window so as to avoid positioning point inside the scroll
342 ** Basic SELinux support has been added.
343 This requires Emacs to be linked with libselinux at build time.
345 *** Emacs preserves the SELinux file context when backing up.
346 Also, the function `copy-file' has an extra optional argument for
347 preserving SELinux context, and the return value of `backup-buffer'
348 now includes the SELinux context.
350 *** New functions `file-selinux-context' and `set-file-selinux-context'
351 get and set the SELinux context of a file.
355 *** `delete-by-moving-to-trash' now only affects commands that specify
356 trashing. This avoids inadvertently trashing temporary files.
358 *** Calling `delete-file' or `delete-directory' with a prefix argument
359 now forces true deletion, regardless of `delete-by-moving-to-trash'.
361 ** File- and directory-local variable changes
363 *** You can stop directory local vars from applying to subdirectories.
364 Add an element (subdirs . nil) to the alist portion of any variables
365 settings to indicate that the section should not apply to
368 *** Directory local variables can apply to some file-less buffers.
369 Affected modes include dired, vc-dir, and log-edit. For example,
370 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
371 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
372 `hack-dir-local-variables-non-file-buffer' to support this.
374 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
375 Instead, use "eval: (minor-mode 1)".
377 *** The variable `inhibit-first-line-modes-regexps' has been renamed
378 to `inhibit-local-variables-regexps'. As the name suggests, it now
379 applies to ALL file local variables, not just -*- lines. The
380 associated `inhibit-first-line-modes-suffixes' has been renamed in the
385 *** The `quit-window' command now restores the last buffer displayed
386 in the quitted window.
388 *** Resizing an Emacs frame now preserves proportional window sizes,
389 modulo restrictions like window minimum sizes and fixed-size windows.
391 *** The behavior of `display-buffer' is now customizable in detail.
393 **** New option `display-buffer-base-action' specifies a list of
394 user-determined display "actions" (functions and optional arguments
395 for choosing the displaying window).
397 This takes precedence over the default display action, which is
398 specified by `display-buffer-fallback-action'.
400 **** New option `display-buffer-alist' maps buffer name regexps to
401 display actions, taking precedence over `display-buffer-base-action'.
403 *** New option `window-combination-limit'.
404 The new option `window-combination-limit' allows to return the space
405 obtained for resizing or creating a window more reliably to the window
406 from which such space was obtained.
408 *** New option `window-combination-resize'.
409 The new option `window-combination-resize' allows to split a window that
410 otherwise cannot be split because it's too small by stealing space from
411 other windows in the same combination. Subsequent resizing or deletion
412 of the window will resize all windows in the same combination as well.
414 *** New option `frame-auto-hide-function' lets you choose between
415 iconifying or deleting a frame when burying a buffer in a dedicated
416 frame, or quitting a window showing a buffer in a frame of its own.
418 *** New commands `maximize-window' and `minimize-window'.
419 These maximize and minimize the size of a window within its frame.
421 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
422 These functions allow to navigate through the live buffers that have
423 been shown in a specific window.
425 ** Minibuffer changes
427 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
428 This is handy for minibuffer-only frames, and is also used for the feature
429 where mouse-1 pops up *Messages*"', which can now easily be changed.
431 *** Minibuffers set `truncate-lines' to nil.
432 If you want to change the value to something else, you could use
433 for example `minibuffer-setup-hook'.
435 ** `auto-mode-case-fold' is now enabled by default.
437 ** `backup-by-copying-when-mismatch' now defaults to t.
439 ** New basic faces `error', `warning', `success'.
440 These are used to highlight text indicating failure, caution or
441 successful operation.
443 ** New option `list-colors-sort' defines the color sort order
444 for `list-colors-display'.
446 ** The variable `focus-follows-mouse' now always defaults to nil.
449 * Editing Changes in Emacs 24.1
453 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
456 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
459 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
461 ** New commands `count-words-region' and `count-words'.
463 *** M-= is bound to `count-words-region', not `count-lines-region'.
464 The `count-words-region' command, when called interactively, reports
465 the number of lines, words, and characters in the region. It is a
466 superset of the old `count-lines-region', which is now an obsolete
469 ** The command `just-one-space' (M-SPC), if given a negative argument,
470 also deletes newlines around point.
474 *** New option `delete-active-region'.
475 If non-nil, [delete] and DEL delete the region if it is active and no
476 prefix argument is given. If set to `kill', those commands kill
479 *** New command `delete-forward-char', bound to [delete].
480 This is meant for interactive use, and obeys `delete-active-region'.
481 The command `delete-char' does not obey `delete-active-region'.
483 *** `delete-backward-char' is now a Lisp function.
484 Apart from obeying `delete-active-region', its behavior is unchanged.
485 However, the byte compiler now warns if it is called from Lisp; Lisp
486 callers should use delete-char with a negative argument instead.
488 *** The option `mouse-region-delete-keys' has been deleted.
490 ** Selection changes.
492 The default handling of clipboard and primary selections has been
493 changed to conform with modern X applications. In short, most
494 commands for killing and yanking text now use the clipboard, while
495 mouse commands use the primary selection.
497 In the following, we provide a list of these changes, followed by a
498 list of steps to get the old behavior back if you prefer that.
500 *** `select-active-regions' now defaults to t.
501 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
502 the kill ring. The selected text is put in the primary selection, if
503 the system possesses a separate primary selection facility (e.g. X).
505 **** `select-active-regions' also accepts a new value, `only'.
506 This means to only set the primary selection for temporarily active
507 regions (usually made by mouse-dragging or shift-selection);
508 "ordinary" active regions, such as those made with C-SPC followed by
509 point motion, do not alter the primary selection.
511 **** `mouse-drag-copy-region' now defaults to nil.
513 *** mouse-2 is now bound to `mouse-yank-primary'.
514 This pastes from the primary selection, ignoring the kill-ring.
515 Previously, mouse-2 was bound to `mouse-yank-at-click'.
517 *** `x-select-enable-clipboard' now defaults to t on all platforms.
519 *** `x-select-enable-primary' now defaults to nil.
520 Thus, commands that kill text or copy it to the kill-ring (such as
521 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
523 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
524 exactly equivalent to M-w, C-w, and C-y respectively.
526 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
527 non-nil by default, as Windows does not support the primary selection
528 between applications.
530 *** To return to the previous behavior, do the following:
532 **** Change `select-active-regions' to nil.
533 **** Change `mouse-drag-copy-region' to t.
534 **** Change `x-select-enable-primary' to t (on X only).
535 **** Change `x-select-enable-clipboard' to nil.
536 **** Bind `mouse-yank-at-click' to mouse-2.
538 *** Support for X cut buffers has been removed.
540 *** X clipboard managers are now supported.
541 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
543 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
544 in the current rectangle. With a prefix argument, this prompts for a
545 number to count from and for a format string.
547 ** `redisplay-dont-pause' now defaults to t.
548 This makes Emacs feel more responsive to editing commands that arrive
549 at high rate, e.g. if you lean on some key, because stopping redisplay
550 in the middle (when this variable is nil) forces more expensive
551 updates later on, and Emacs appears to be unable to keep up.
553 ** The behavior of <TAB> for active regions in Text mode has changed.
554 In Text and related modes, typing <TAB> (`indent-for-tab-command')
555 when the region is active causes Emacs to indent all the lines in the
556 region, aligning them with the line previous to the first line in the
557 region (or with the left margin if there is no previous line).
559 ** When `occur' is called with a prefix argument, matching strings are
560 collected into the `*Occur*' buffer without line numbers. If there
561 are parenthesized subexpressions in the specified regexp, `occur'
562 reads replacement text that may contain \\& and \\N whose convention
563 follows `replace-match'.
566 * Changes in Specialized Modes and Packages in Emacs 24.1
568 ** Archive Mode has basic support for browsing and updating 7z archives.
572 *** BibTeX mode now supports biblatex.
573 Use the variable `bibtex-dialect' to select different BibTeX dialects.
574 `bibtex-entry-field-alist' is now an obsolete alias for
575 `bibtex-BibTeX-entry-alist'.
577 *** New command `bibtex-search-entries', bound to C-c C-a.
579 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
581 *** New variable `bibtex-search-entry-globally'.
585 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
587 *** The default browser used by the package is now the "xdg-open" program,
588 on platforms that support it. This calls your desktop's preferred browser.
590 ** Calendar, Diary, and Appt
592 *** Diary entries can contain non-printing "comments".
593 See the variable `diary-comment-start'.
595 *** Appointments can specify their individual warning times.
596 See the variable `appt-warning-time-regexp'.
598 *** The function specified by `appt-disp-window-function' may be passed
599 lists of arguments if multiple appointments are due at similar times.
600 If you are using a custom function for this, you should update it.
602 *** New function `diary-hebrew-birthday'.
604 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
605 may no longer be nil, but must all be strings.
607 *** The obsolete (since Emacs 22.1) method of enabling the appt
608 package by adding `appt-make-list' to `diary-hook' has been removed.
609 Use `appt-activate' instead.
611 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
612 appt-issue-message (use the function appt-activate)
613 appt-visible/appt-msg-window (use the variable appt-display-format)
615 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
616 view-diary-entries, list-diary-entries, show-all-diary-entries
620 *** New feature to "guess" the style in an existing buffer.
621 The main entry point is M-x c-guess.
623 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
625 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
626 Thus C-M-a will, by default, go to the beginning of the immediate function,
629 *** "Macros with semicolons" can be registered for correct indentation.
630 Where such a macro ends a line (no semicolon) the next statement is no longer
631 parsed as a statement continuation.
633 ** Comint and modes derived from it use the standard completion code.
637 *** Compilation mode can be used without Font Lock mode.
638 `compilation-parse-errors-function' is now obsolete.
640 *** New variable `compilation-filter-start', which is bound while
641 `compilation-filter-hook' runs. It records the start position of the
642 text inserted by `compilation-filter'.
644 *** `compilation-error-screen-columns' and `compilation-first-column'
645 are obeyed in the editing buffer. So programming language modes can
646 set them, whereas previously only the value in the *Compilation*
651 *** Customize buffers now contain a search field.
652 The search is performed using `customize-apropos'.
653 To turn off the search field, set `custom-search-field' to nil.
655 *** Custom options now start out hidden if at their default values.
656 Use the arrow to the left of the option name to toggle visibility.
658 *** custom-buffer-sort-alphabetically now defaults to t.
660 *** The color widget now has a "Choose" button, which allows you to
661 choose a color via `list-colors-display'.
665 *** It is now possible to access buses other than the default system
668 *** The `dbus-register-method' and `dbus-register-property' functions
669 optionally do not register names.
671 *** The new function `dbus-register-service' registers a known service
672 name on a D-Bus without also registering a property or a method.
676 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
677 if called with a prefix argument, read a file name from the minibuffer
678 instead of using the current buffer.
680 *** The "dired local variables" feature of Dired-x is obsolete.
681 The standard directory local variables feature replaces it.
685 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
686 controlling attempts to autojoin a channel.
688 *** New variable `erc-coding-system-precedence': If we use `undecided'
689 as the server coding system, this variable will then be consulted.
690 The default is to decode strings that can be decoded as utf-8 as
691 utf-8, and do the normal `undecided' decoding for the rest.
695 *** The default value of `eshell-directory-name' has changed
696 to be an "eshell" directory in `user-emacs-directory'.
697 The old "~/.eshell/" directory is still used if it exists, though.
701 *** The M-x gdb command now uses the GDB Machine Interface protocol.
702 It now supports multithread non-stop debugging and simultaneous
703 debugging of several threads.
707 *** RET (`image-toggle-animation') toggles animation, if applicable.
708 Animation plays once, unless the option `image-animate-loop' is non-nil.
712 *** New command M-x info-display-manual displays a named Info manual.
713 If that manual is already visited in some Info buffer, it displays
714 that buffer. (This is handy if you have many manuals in many *info*
715 buffers, and don't remember the name of the buffer visiting the manual
716 you want to consult.) Otherwise, it loads and displays the manual.
718 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
719 This is for compatibility with the stand-alone Info reader program,
720 and also because `Info-edit' is a rarely used command that is disabled
723 ** Mail mode changes (not Message mode)
725 *** New command M-x mail-add-attachment for adding MIME attachments
727 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
728 (Its name is misleading, since it has nothing to do with MIME
729 attachments.) The old name is now an obsolete alias to the new name.
731 ** MH-E has been upgraded to MH-E version 8.3.1.
732 See MH-E-NEWS for details.
734 ** Modula-2 mode provides auto-indentation.
736 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
738 ** nXML mode no longer binds C-RET to `nxml-complete'.
739 Completion is now performed via `completion-at-point', bound to C-M-i
740 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
741 default), this performs tag completion.
743 ** Prolog mode has been completely revamped, with lots of additional
744 functionality such as more intelligent indentation, electricity,
745 support for more variants, including Mercury, and a lot more.
749 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
750 in the Rmail incoming message.
752 *** The variable `rmail-message-filter' no longer has any effect.
753 This change was made in Emacs 23.1 but was not advertised at the time.
754 Try using `rmail-show-message-hook' instead.
758 *** M-x shell prompts for the shell path name if the default directory
759 is a remote file name and neither the environment variable $ESHELL nor
760 the variable `explicit-shell-file-name' is set.
762 *** TAB is now bound to the standard `completion-at-point' command,
763 which now implements the pcomplete rules for shell command completion.
767 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
768 if the mail server supports them. This uses either built-in GnuTLS
769 support, or the starttls.el library. Customize `smtpmail-stream-type'
772 *** The variable `smtpmail-auth-credentials' has been removed.
773 By default, the information is now stored in the file ~/.authinfo.
774 This was the default value of smtpmail-auth-credentials. If you had
775 customized smtpmail-auth-credentials to a list of user names and
776 passwords, those settings are not used. During your first connection
777 to the smtp server, Emacs will prompt for the user name and password,
778 and offer to save them to ~/.authinfo. Or you can manually copy the
779 credentials to ~/.authinfo. For example, if you had
781 (setq smtpmail-auth-credentials
782 '(("mail.example.org" 25 "jim" "s!cret")))
784 then the equivalent line in ~/.authinfo would be
786 machine mail.example.org port 25 login jim password s!cret
788 See the auth-source manual for more information, e.g. on encrypting
789 the credentials file.
791 *** The variable `smtpmail-starttls-credentials' has been removed.
792 If you had that set, you need to put
794 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
796 in your ~/.authinfo file instead.
800 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
801 and `sql-oracle-scan-on'.
803 *** New options controlling prompting for login parameters.
804 Each supported product has a custom variable `sql-*-login-params',
805 which is a list of the parameters to be prompted for before a
806 connection is established.
808 *** The command `sql-product-interactive' now takes a prefix argument,
809 which causes it to prompt for an SQL product.
811 *** Product-specific SQL interactive commands now take prefix arguments.
812 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
813 given a prefix argument, prompt for a name for the SQL interactive
814 buffer. This reduces the need for calling `sql-rename-buffer'.
816 *** SQL interactive modes suppress command continuation prompts, and
817 replace tabs with spaces. The first change impacts multiple line SQL
818 statements entered with C-j between each line, statements yanked into
819 the buffer and statements sent with `sql-send-*' functions. The
820 second prevents the MySQL and Postgres interpreters from listing
821 object name completions when sent text via `sql-send-*' functions.
823 *** New command `sql-connect' starts a predefined SQLi session,
824 using the login parameters from `sql-connection-alist'.
826 *** New "Save Connection" menu item in SQLi buffers.
827 This gathers the login params specified for the SQLi session, if it
828 was not started by a connection, and saves them as a new connection.
830 *** New commands for listing database objects and details:
831 sql-list-all and sql-list-table.
833 *** An API for manipulating SQL product definitions has been added.
837 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
841 *** New inline access method "ksu" (kerberized su).
843 *** The following access methods are discontinued: "ssh1_old",
844 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
846 *** The user option `remote-file-name-inhibit-cache' controls whether
847 remote file attributes are cached for better performance.
849 *** The option `ange-ftp-binary-file-name-regexp' has changed its
852 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
853 for remote machines which support SELinux.
855 ** New function `url-queue-retrieve', which behaves like url-retrieve,
856 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
857 the degree of parallelism.
859 ** VC and related modes
861 *** Support for pulling on distributed version control systems.
862 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
863 supported (currently with Bzr, Git, and Mercurial), to update the
864 current branch and working tree. A prefix argument means to prompt
865 the user for specifics, e.g. a pull location.
867 *** `vc-update' is now an alias for `vc-pull'.
869 *** Support for merging on distributed version control systems.
870 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
871 is supported (currently with Bzr, Git, and Mercurial), to merge
872 changes from another branch into the current one. It prompts for
873 specifics, e.g. a merge source.
875 *** New option `vc-revert-show-diff' controls whether `vc-revert'
876 shows a diff while querying the user. It defaults to t.
878 *** Log entries in some Log View buffers can be toggled to display a
879 longer description by typing RET (log-view-toggle-entry-display).
880 This is currently supported for Bzr, Git, and Mercurial (to support
881 another backend, define a `log-view-expanded-log-entry-function').
882 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
883 use this to display the full log entry for the revision at point.
885 *** New command `vc-ediff' allows visual comparison of two revisions
886 of a file similar to `vc-diff', but using ediff backend.
888 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
889 this was not advertised at the time.
891 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
892 Since Emacs 23, it has done the same thing as `toggle-read-only', but
893 this was not advertised at the time.
899 *** erc-hecomplete.el (use erc-pcomplete.el instead)
901 *** partial-completion-mode (complete.el) is obsolete.
902 You can get a comparable behavior with:
903 (setq completion-styles '(partial-completion initials))
904 (setq completion-pcm-complete-word-inserts-delimiters t)
906 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
908 *** pgg is obsolete (use EasyPG instead).
910 *** sregex.el is obsolete, since rx.el is a strict superset.
912 *** s-region.el and pc-select.el are obsolete.
913 They are superseded by shift-select-mode, enabled by default since 23.1.
915 *** vc-mcvs.el is obsolete (for lack of a maintainer).
919 *** The Landmark game is now invoked with `landmark', not `lm'.
920 Its functions and variables have been similarly renamed.
922 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
923 (This interfered with cua-mode.)
925 *** f90.el has some support for Fortran 2008 syntax.
927 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
929 *** New command `nato-region' converts text to NATO phonetic alphabet.
932 * New Modes and Packages in Emacs 24.1
934 ** Occur Edit mode applies edits made in *Occur* buffers to the
935 original buffers. It is bound to "e" in Occur mode.
937 ** New global minor mode electric-pair-mode.
938 When enabled, typing an open parenthesis automatically inserts the
939 matching closing one.
941 ** New global minor mode electric-indent-mode.
942 When enabled, typing certain characters triggers reindentation.
943 Major modes wishing to use this can set electric-indent-chars or
944 electric-indent-functions.
946 ** New global minor mode electric-layout-mode.
947 When enabled, typing certain characters automatically inserts newlines.
948 Major modes wishing to use this can set electric-layout-rules.
950 ** tabulated-list.el provides a generic major mode for tabulated data,
951 from which other modes can be derived.
953 ** pcase.el provides the ML-style pattern matching macro `pcase'.
955 ** secrets.el is an implementation of the Secret Service API, an
956 interface to password managers like GNOME Keyring or KDE Wallet. The
957 Secret Service API requires D-Bus for communication. The command
958 `secrets-show-secrets' offers a buffer with a visualization of the
961 ** notifications.el provides an implementation of the Desktop
962 Notifications API. It requires D-Bus for communication.
964 ** soap-client.el supports access to SOAP web services from Emacs.
965 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
967 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
969 ** New emacs-lock.el package.
970 The previous version has been moved to obsolete/old-emacs-lock.el.
971 Now, there is a proper minor mode `emacs-lock-mode'. Protection
972 against exiting Emacs and killing the buffer can be set separately.
973 The mechanism for automatically turning off protection for buffers
974 with dead inferior processes has been generalized.
977 * Incompatible Lisp Changes in Emacs 24.1
979 ** Passing a nil argument to a minor mode function call now ENABLES
980 the minor mode unconditionally. This is so that you can write e.g.
982 (add-hook 'text-mode-hook 'foo-mode)
984 to enable foo-mode in Text mode buffers, removing the need for
985 `turn-on-foo-mode' style functions. This affects all mode commands
986 defined by `define-minor-mode'. If called interactively, the mode
987 command still toggles the minor mode.
989 ** The return value of `backup-buffer' has changed.
990 It is now a list of three elements, where the second element is a list
991 describing the original file's SELinux context. If Emacs or the
992 system lacks SELinux support, the context list is (nil nil nil nil).
993 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
995 ** `char-direction-table' and the `char-direction' function were deleted.
996 They were buggy and inferior to the new support of bidirectional
997 editing introduced in Emacs 24. If you need the bidirectional
998 properties of a character, use `get-char-code-property' with the last
999 argument `bidi-class'.
1001 ** `copy-directory' now copies the source directory as a subdirectory
1002 of the target directory, if the latter is an existing directory. The
1003 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
1004 the contents directly into a pre-existing target directory.
1006 ** For mouse click input events in the text area, the Y pixel
1007 coordinate in the POSITION list now counts from the top of the text
1008 area, excluding any header line. Previously, it counted from the top
1011 ** Support for "old-style" backquotes, obsolete for 10+ years, has
1012 been further reduced. Now a backquote not followed by a space is
1013 always treated as a "new-style" backquote. Please remove all
1014 "old-style" backquotes from your code. If your code uses backquotes
1015 as documented in the Elisp manual, and compiles without warning, then
1016 you have nothing to do in this regard. Code not following the
1017 appropriate conventions may fail to compile.
1019 The most common cause of trouble seems to be an old-style backquote
1020 followed by a newline. Another cause of trouble is vector notation
1021 for key sequence notation: instead of [(control ,)] and [(control ')],
1022 you should write [(control ?,)] and [(control ?')], which will work in
1025 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
1026 was not advertised at the time. The function `custom-initialize-delay'
1027 replaced all known uses.
1029 ** `view-buffer' now treats special mode-class in the same way that
1030 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
1031 major mode is special).
1033 ** Menu and tool bar changes
1035 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
1036 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
1037 With these alist entries omitted, `make-frame' checks the value of the
1038 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
1039 a menu-bar or tool-bar, respectively. If the alist entries are added,
1040 they override the value of `menu-bar-mode'/`tool-bar-mode'.
1042 *** The menu bar bindings's caches are not used any more.
1043 Use (where-is-internal <def> nil t) instead.
1045 ** Regions created by mouse dragging are now normal active regions,
1046 similar to those created by shift-selection (see Selection changes
1047 above). In previous Emacs versions, these regions were delineated by
1048 `mouse-drag-overlay'; that variable has been removed.
1050 ** The fourth argument of `filter-buffer-substring' has been removed.
1051 If you want to remove text properties from the final result, simply
1052 pass the result through substring-no-properties.
1054 ** cl.el no longer provides `cl-19'.
1056 ** The following obsolete functions and aliases have been removed
1057 (the appropriate new function is given in parentheses; "not needed"
1058 means you can just remove all calls to the function in question):
1060 *** `comint-kill-output' (`comint-delete-output')
1061 *** `decompose-composite-char' (`char-to-string')
1062 *** `outline-visible' (`outline-invisible-p')
1063 *** `internal-find-face' (`facep')
1064 *** `internal-get-face' (`facep and check-face')
1065 *** `frame-update-faces' (not needed)
1066 *** `frame-update-face-colors' (`frame-set-background-mode')
1067 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
1068 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
1069 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
1070 *** `x-make-font-bold-italic' (`make-face-bold-italic')
1071 *** `x-make-font-unbold' (`make-face-unbold')
1072 *** `x-make-font-unitalic' (`make-face-unitalic')
1073 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
1074 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
1075 *** `iswitchb-default-keybindings' (`iswitchb-mode')
1076 *** `char-bytes' (== 1)
1077 *** `isearch-return-char' (`isearch-printing-char')
1078 *** `make-local-hook' (not needed)
1079 *** `set-screen-height' (`set-frame-height')
1080 *** `set-screen-width' (`set-frame-width')
1082 ** The following obsolete variables and varaliases have been removed
1083 (the appropriate new variable is given in parentheses):
1085 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
1086 *** `vc-header-alist' (`vc-BACKEND-header')
1087 *** `directory-sep-char' (== ?/)
1088 *** `font-lock-defaults-alist' (`font-lock-defaults')
1089 *** `e' (`float-e').
1091 ** The following obsolete files were removed:
1092 sc.el, x-menu.el, rnews.el, rnewspost.el
1094 ** The format of the finder-inf.el file has changed, since the Finder
1095 mechanism is now based on the package system. The variable
1096 `finder-package-info' is replaced by `package--builtins' and
1097 `finder-keywords-hash'.
1099 ** When generating autoloads, `update-directory-autoloads' no longer
1100 assumes every inspected file is in your `load-path'. It instead
1101 generates relative names according to the current `load-path'.
1104 * Lisp changes in Emacs 24.1
1106 ** Code can now use lexical scoping by default instead of dynamic scoping.
1107 The `lexical-binding' variable enables lexical scoping for local
1108 variables. It is typically set via a file-local variable in the first
1109 line of the file, in which case it applies to all the code in that
1112 *** `eval' takes a new optional argument `lexical' to choose the new lexical
1113 binding instead of the old dynamic binding mode.
1115 *** Lexically scoped interpreted functions are represented with a new form
1116 of function value which looks like (closure ENV ARGS &rest BODY).
1118 *** New macro `letrec' to define recursive local functions.
1120 *** `defvar' and `defconst' now mark the variable as special (dynamic).
1121 So do `defcustom' and other forms that call `defvar' as a subroutine.
1123 *** New function `special-variable-p' to check whether a variable is
1124 declared as dynamically bound.
1126 ** An Emacs Lisp testing tool is now included.
1127 Emacs Lisp developers can use this tool to write automated tests for
1128 their code. See the ERT info manual for details.
1130 ** Changes for bidirectional display and editing
1132 *** New function `current-bidi-paragraph-direction'.
1133 This returns the base direction of the paragraph at point.
1135 *** New function `bidi-string-mark-left-to-right'.
1136 Given a string containing characters from right-to-left scripts, this
1137 function returns another string which can be safely inserted into a
1138 buffer, such that any following text will be always displayed to the
1139 right of that string. (This works by appending an invisible Unicode
1140 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
1142 This is useful when the buffer has overall left-to-right paragraph
1143 direction and you need to insert a string whose contents are not known
1144 in advance, without disrupting the layout of the line.
1148 *** Window tree functions are accessible in Elisp.
1149 Functions are provided to return the parent, siblings or child windows
1150 of any window including internal windows (windows not associated with a
1151 buffer) in the window tree.
1153 **** New function `window-valid-p' gives non-nil for live and internal
1156 **** Window manipulation can deal with internal windows.
1157 Many window handling functions like `split-window', `delete-window', or
1158 `delete-other-windows' as well as the window resizing functions can now
1159 act on any window including internal ones.
1161 *** window-total-height/-width vs window-body-height/-width.
1162 The function `window-height' has been renamed to `window-total-height'
1163 and `window-width' has been renamed to `window-body-width'. The old
1164 names are provided as aliases. Two new functions `window-total-width'
1165 and `window-body-height' are provided.
1167 *** Window parameters specific to window handling functions.
1168 For each window you can specify a parameter to override the default
1169 behavior of a number of functions like `split-window', `delete-window'
1170 and `delete-other-windows'. The variable `ignore-window-parameters'
1171 allows to ignore processing such parameters.
1173 *** New semantics of third argument of `split-window'.
1174 The third argument of `split-window' has been renamed to SIDE and can be
1175 set to any of the values 'below, 'right, 'above, or 'left to make the
1176 new window appear on the corresponding side of the window that shall be
1177 split. Any other value of SIDE will cause `split-window' to split the
1178 window into two side-by-side windows as before.
1180 *** Window resizing functions.
1181 A new standard function for resizing windows called `window-resize' has
1182 been introduced. This and all other functions for resizing windows no
1183 longer delete any windows when they become too small.
1185 *** Deleting the selected window now selects the most recently selected
1186 live window on that frame instead.
1188 *** `adjust-window-trailing-edge' adjustments.
1189 `adjust-window-trailing-edge' can now deal with fixed-size windows and
1190 is able to resize other windows if a window adjacent to the trailing
1191 edge cannot be shrunk any more. This makes its behavior more similar to
1192 that of Emacs 21 without compromising, however, its inability to delete
1193 windows which was introduced in Emacs 22.
1195 *** Window-local buffer lists.
1196 Windows now have local buffer lists. This means that removing a buffer
1197 from display in a window will preferably show the buffer previously
1198 shown in that window with its previous window-start and window-point
1199 positions. This also means that the same buffer may be automatically
1200 shown twice even if it already appears in another window.
1202 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
1203 which if non-nil requires the buffer to be displayed in the currently
1204 selected window, signaling an error otherwise. If nil, another window
1205 can be used, e.g. if the selected one is strongly dedicated.
1207 *** `split-window-vertically' and `split-window-horizontally' renamed
1208 to `split-window-below' and `split-window-right' respectively.
1209 The old names are kept as aliases.
1213 **** The second arg to `display-buffer' and `pop-to-buffer' is now
1214 named ACTION, and takes a display action of the same form as
1215 `display-buffer-base-action' (see Changes, above). A non-nil,
1216 non-list value is treated specially, as the old meaning.
1218 **** New variable `display-buffer-overriding-action'.
1220 **** The procedure of `display-buffer' etc. to choose a window is
1221 determined by combining `display-buffer-overriding-action',
1222 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
1223 and `display-buffer-fallback-action'. The second and fourth of these
1224 are user-customizable variables.
1226 See the docstring of `display-buffer' for details.
1228 *** New functions `window-state-get' and `window-state-put'.
1229 These functions allow to save and restore the state of an arbitrary
1230 frame or window as an Elisp object.
1234 *** New variable `completion-extra-properties' used to specify extra
1235 properties of the current completion:
1236 - :annotate-function, same as the old completion-annotate-function.
1237 - :exit-function, function to call after completion took place.
1239 *** Functions on `completion-at-point-functions' can return any of the
1240 properties valid for `completion-extra-properties'.
1242 *** `completion-annotate-function' is obsolete.
1244 *** New `metadata' method for completion tables. The metadata thus returned
1245 can specify various details of the data returned by `all-completions':
1246 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
1247 used to select a style in completion-category-overrides.
1248 - `annotation-function' to add annotations in *Completions*.
1249 - `display-sort-function' to specify how to sort entries in *Completions*.
1250 - `cycle-sort-function' to specify how to sort entries when cycling.
1252 *** `minibuffer-local-filename-must-match-map' is not used any more.
1253 Instead, the bindings in `minibuffer-local-filename-completion-map'
1254 are combined with `minibuffer-local-must-match-map'.
1256 *** New variable `completing-read-function' allows overriding the
1257 behavior of `completing-read'.
1259 ** `glyphless-char-display' can now distinguish between graphical and
1260 text terminal display, via a char-table entry that is a cons cell.
1262 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
1263 Instead, the offending function is removed.
1267 *** New function `run-hook-wrapped' for running an abnormal hook by
1268 passing the hook functions as arguments to a "wrapping" function.
1269 Like `run-hook-with-args-until-success', it stops at the first
1270 non-nil return value.
1272 *** New macro `with-wrapper-hook' for running an abnormal hook as a
1273 set of "wrapping" filters, similar to around advice.
1274 (A version of this macro was actually added in Emacs 23.2 but was not
1275 advertised at the time.)
1279 *** New macro `condition-case-unless-debug' (this was actually added in
1280 Emacs 23.1 as condition-case-no-debug, but not advertised)
1282 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
1284 *** Variable `stack-trace-on-error' removed.
1286 *** The debugger can now "continue" from an error, which means it will
1287 jump to the error handler as if the debugger had not been invoked
1288 instead of jumping all the way to the top-level.
1290 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
1291 This can be useful when `inhibit-quit' is set.
1293 ** The new function `server-eval-at' allows evaluation of Lisp forms on
1294 named Emacs server instances.
1296 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
1297 to redirect STDOUT to a file.
1299 ** The function `format-time-string' now supports the %N directive,
1300 for higher-resolution time stamps.
1302 ** New input reading functions
1304 *** New function `read-char-choice' reads a restricted set of
1305 characters, discarding any inputs not inside the set.
1307 *** The command `read-color' now requires a match for a color name
1308 or RGB triplet, instead of signaling an error if the user provides
1311 **** `facemenu-read-color' is now an alias for `read-color'.
1313 ** `image-library-alist' is renamed to `dynamic-library-alist'.
1314 The variable is now used to load all kind of supported dynamic libraries,
1315 not just image libraries. The previous name is still available as an
1318 ** Syntax parsing changes
1320 *** New variable `syntax-propertize-function'.
1321 This replaces `font-lock-syntactic-keywords' which is now obsolete.
1322 This allows syntax-table properties to be set independently from font-lock:
1323 just call syntax-propertize to make sure the text is propertized.
1324 Together with this new variable come a new hook
1325 syntax-propertize-extend-region-functions, as well as two helper functions:
1326 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
1327 as-is; and syntax-propertize-rules which provides a new way to specify
1330 *** Syntax tables support a new "comment style c" additionally to style b.
1332 ** New hook `post-self-insert-hook', run after `self-insert-command'.
1334 ** frame-local variables cannot be let-bound any more.
1336 ** Major and minor mode changes
1338 *** `set-auto-mode' now respects mode: local variables at the end of files,
1339 as well as those in the -*- line.
1341 *** `prog-mode' is a new major mode from which programming modes
1344 **** `prog-mode-hook' can be used to enable features for programming
1345 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
1346 on-the-fly spell checking for comments and strings.
1348 *** New hook `change-major-mode-after-body-hook', run by
1349 `run-mode-hooks' just before any other mode hooks.
1351 *** Enabled globalized minor modes can be disabled in specific major modes.
1352 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
1353 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
1355 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
1357 ** File-handling changes
1359 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
1360 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
1361 both non-nil. Interactively, TRASH defaults to t, unless a prefix
1362 argument is supplied (see Trash changes, above).
1364 *** New file predicates: `file-equal-p', `file-in-directory-p'.
1366 ** Tool-bars can display separators.
1367 Tool-bar separators are handled like menu separators in menu-bar maps,
1368 i.e. via menu entries of the form `(menu-item "--")'.
1372 *** Animated images support (currently animated gifs only).
1374 **** `image-animated-p' returns non-nil if an image can be animated.
1376 **** `image-animate' animates a supplied image spec.
1378 **** `image-animate-timer' returns the timer object for an image that
1381 *** `image-extension-data' has been renamed to `image-metadata'.
1382 The old name is an obsolete alias to the new one.
1384 *** Image mode can view any image type that ImageMagick supports.
1385 This requires Emacs to be built with ImageMagick support.
1387 **** New function `imagemagick-types', defined if ImageMagick support
1388 is enabled, returns a list of image file extensions that your
1389 ImageMagick installation supports.
1391 **** New function `imagemagick-register-types' enables ImageMagick
1392 image types in Image mode and in `create-image' and other helper
1395 **** New option `imagemagick-types-inhibit' excludes certain
1396 ImageMagick image types from `imagemagick-register-types'.
1398 **** With ImageMagick support, there are extra Image mode commands to
1399 resize and rotate images: `image-transform-fit-to-height',
1400 `image-transform-fit-to-width', `image-transform-set-rotation', and
1401 `image-transform-set-scale'.
1403 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
1404 passes it to the mail user agent function. This argument specifies an
1405 action for returning to the caller after finishing with the mail. For
1406 example, this is used by Rmail to optionally delete a mail window.
1408 ** XML and HTML parsing
1409 If Emacs is compiled with libxml2 support, there are two new
1410 functions: `libxml-parse-html-region' (which parses "real world" HTML)
1411 and `libxml-parse-xml-region' (which parses XML). Both return an
1412 Emacs Lisp parse tree.
1414 ** Networking and encryption changes
1416 *** `open-network-stream' can now be used to open an encrypted stream.
1417 It now accepts an optional `:type' parameter for initiating a TLS
1418 connection, directly or via STARTTLS. To do STARTTLS, additional
1419 parameters (`:end-of-command', `:success', `:capabilities-command')
1420 must also be supplied.
1422 *** New library gnutls.el.
1423 The new function `gnutls-available-p' returns non-nil if Emacs is
1424 built with GnuTLS support. The main entry points are
1425 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
1426 these functions through `open-network-stream', because that can
1427 upgrade connections through STARTTLS opportunistically or use plain
1428 SSL, depending on your needs. For debugging, set `gnutls-log-level'
1431 *** New primitive `secure-hash' that supports many secure hash algorithms:
1432 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
1433 sha1.el has been removed. The `sha1' feature is provided by default.
1437 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
1439 ** Progress reporters can now "spin".
1440 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
1441 now be nil, or omitted. This makes a "non-numeric" reporter. Each
1442 time you call `progress-reporter-update' on that progress reporter,
1443 with a nil or omitted VALUE argument, the reporter message is
1444 displayed with a "spinning bar".
1446 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
1447 being reverted, even if the buffer has a local `revert-buffer-function'.
1449 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
1450 If delayed-warnings-list is non-nil, the command loop calls
1451 `delayed-warnings-hook' after `post-command-hook'. At present, this
1452 is only used by Emacs on some platforms to display warnings during
1453 startup, which might otherwise not be noticed. This uses the
1454 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
1456 ** rx.el has a new `group-n' construct for explicitly numbered groups.
1458 ** New function `make-composed-keymap' that constructs a new keymap
1459 from multiple input maps. You can use this to make a keymap that
1460 inherits from multiple maps, eg:
1461 (set-keymap-parent newmap (make-composed-keymap othermap parent))
1463 ** New function `string-prefix-p'.
1464 (This was actually added in Emacs 23.2 but was not advertised at the time.)
1466 ** New reader macro ## that stands for the empty symbol.
1467 This means that the empty symbol can now be read back. Also, #: by itself
1468 (when not immediately followed by a possible symbol character) stands for
1469 an empty uninterned symbol.
1471 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
1473 ** The following functions and variables are obsolete:
1475 *** `tooltip-use-echo-area' is obsolete.
1476 Rather than setting this to t, disable Tooltip mode instead.
1478 *** buffer-substring-filters is obsolete.
1479 Use `filter-buffer-substring-functions' instead.
1481 *** `byte-compile-disable-print-circle' is obsolete.
1483 *** `deferred-action-list' and `deferred-action-function' are obsolete.
1484 Use `post-command-hook' instead.
1486 *** `font-lock-maximum-size' is obsolete.
1489 * Changes in Emacs 24.1 on non-free operating systems
1491 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
1492 and also when HOME is set to C:\ by default.
1494 ** New configure.bat options
1496 *** --enable-checking builds Emacs with extra runtime checks.
1498 *** --distfiles specifies files to be included in binary distribution.
1500 *** --without-gnutls disables automatic GnuTLS detection.
1502 *** --lib for general library linkage, works with the USER_LIBS build variable.
1504 ** New make target `dist' to create binary distribution for MS Windows.
1506 ** The Lisp function `w32-default-color-map' is now obsolete.
1507 (It is only used internally in the Emacs C code.)
1509 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
1510 reappear on mouse-over. (Requires OS X 10.6 or later.)
1512 ** On Mac OS X, dragging a file into Emacs visits the file, like on
1513 other platforms, rather than inserting its contents into the buffer.
1516 ----------------------------------------------------------------------
1517 This file is part of GNU Emacs.
1519 GNU Emacs is free software: you can redistribute it and/or modify
1520 it under the terms of the GNU General Public License as published by
1521 the Free Software Foundation, either version 3 of the License, or
1522 (at your option) any later version.
1524 GNU Emacs is distributed in the hope that it will be useful,
1525 but WITHOUT ANY WARRANTY; without even the implied warranty of
1526 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1527 GNU General Public License for more details.
1529 You should have received a copy of the GNU General Public License
1530 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
1535 paragraph-separate: "[
\f]*$"