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
33 * Startup Changes in Emacs 24.2
35 ** Emacs no longer searches for `leim-list.el' files beneath the standard
36 lisp/ directory. There should not be any there anyway. If you have
37 been adding them there, put them somewhere else, eg site-lisp.
40 * Changes in Emacs 24.2
42 ** New functions `system-users', `system-groups' return lists of the user
43 name, group names known to the system (where possible).
45 ** If your Emacs was built from a bzr checkout, the new variable
46 `emacs-bzr-version' contains information about which bzr revision was used.
48 ** ImageMagick support, if available, is automatically enabled.
49 It is no longer necessary to call `imagemagick-register-types'
50 explicitly to install ImageMagick image types; that function is called
51 automatically when setting `imagemagick-types-inhibit'.
53 *** Setting `imagemagick-types-inhibit' to t now disables the use of
54 ImageMagick to view images, set
56 ** String values for `initial-buffer-choice' also apply to emacsclient
57 frames, if emacsclient is only told to open a new frame without
58 specifying any file to visit or expression to evaluate.
61 * Editing Changes in Emacs 24.2
63 ** M-x move-to-column, if called interactively with no prefix arg, now
64 prompts for a column number.
66 ** `mouse-avoidance-banish-position' can now be used to customize
67 `mouse-avoidance-mode' further.
69 ** `C-M-f' and `C-M-b' will now move to the path name separator
70 character when doing minibuffer filename prompts.
72 ** `goto-char' is now bound to `M-g c'.
75 * Changes in Specialized Modes and Packages in Emacs 24.2
79 *** The faces used by Apropos are now directly customizable.
80 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
81 see the `apropos' Custom group for details.
83 **** The old options whose values specified faces to use were removed
84 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
88 *** `custom-reset-button-menu' now defaults to t.
90 *** Non-option variables are never matched in `customize-apropos' and
91 `customize-apropos-options' (i.e. the prefix argument does nothing for
94 ** erc will look up server/channel names via auth-source and use the
95 channel keys found, if any.
97 ** The `server-auth-key' variable can be used to set a permanent
98 shared key for Emacs Server.
100 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
101 closing brackets to be aligned with the line of the opening bracket.
103 ** FIXME something happened to ses.el, 2012-04-17.
105 ** which-function-mode now applies to all applicable major modes by default.
110 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
113 *** The D-Bus object manager interface is implemented.
116 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
117 if their value does not fit into Emacs's integer range.
120 *** The function `dbus-call-method' works non-blocking now, it can be
121 interrupted by C-g. `dbus-call-method-non-blocking' is obsolete.
124 *** Signals can be sent also as unicast message.
127 *** The argument list of `dbus-register-signal' has been extended,
128 according to the new match rule types of D-Bus. See the manual for
132 *** `dbus-init-bus' supports private connections.
135 *** There is a new function `dbus-setenv'.
137 ** Obsolete packages:
144 * New Modes and Packages in Emacs 24.2
146 * Incompatible Lisp Changes in Emacs 24.2
149 ** Docstrings starting with `*' no longer indicate user options.
150 Only variables defined using `defcustom' are considered user options.
151 The function `user-variable-p' is now an obsolete alias for
154 ** `face-spec-set' no longer sets frame-specific attributes when the
155 third argument is a frame (that usage was obsolete since Emacs 22.2).
158 * Lisp changes in Emacs 24.2
160 * Changes in Emacs 24.2 on non-free operating systems
162 ** New configure.bat options on MS-Windows:
164 *** --without-libxml2 omits support for libxml2, even if its presence
168 * Installation Changes in Emacs 24.1
170 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
171 to configure. Note that other libraries used by Emacs, RSVG and GConf,
172 also depend on Gtk+. You can disable them with --without-rsvg and
175 ** Emacs can be compiled with GnuTLS support.
176 This happens by default if a suitably recent version of the library is
177 found at build time. To prevent this, use the configure option
178 `--without-gnutls'. See below for GnuTLS features.
180 ** Emacs can be compiled with SELinux support.
181 This happens by default if a suitably recent version of the library is
182 found at build time. To prevent this, use the configure option
183 `--without-selinux'. See below for SELinux features.
185 ** Emacs can be compiled with ImageMagick support.
186 This happens by default if a suitably recent version of the library is
187 found at build time. To prevent this, use the configure option
188 `--without-imagemagick'. See below for ImageMagick features.
189 This feature is not available for the Nextstep or MS ports.
191 ** Emacs can be compiled with libxml2 support.
192 This happens by default if a suitably recent version of the library is
193 found at build time. To prevent this, use the configure option
194 `--without-xml2'. See below for libxml2 features.
196 ** By default, the installed Info and man pages are compressed.
197 You can disable this by configuring --without-compress-info.
199 ** New configure option --with-wide-int.
200 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
201 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
204 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
205 These provide no new functionality, they just remove the need to edit
206 lib-src/Makefile by hand in order to use the associated features.
208 ** New configure option --enable-use-lisp-union-type.
209 This is only useful for Emacs developers to debug certain types of bugs.
210 This is not a new feature; only the configure flag is new.
212 ** The standalone programs digest-doc and sorted-doc are removed.
213 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
215 ** The standalone program `fakemail' is removed.
216 If you need it, feedmail.el provides a superset of the functionality.
219 * Startup Changes in Emacs 24.1
221 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
222 command line arguments, and the EMACS_UNIBYTE environment variable, no
223 longer have any effect. (They were declared obsolete in Emacs 23.)
225 ** New command line option `--no-site-lisp' removes site-lisp directories
226 from load-path. -Q now implies this. This option does not affect the
227 EMACSLOADPATH environment variable (and hence has no effect for
231 * Changes in Emacs 24.1
235 *** Many packages now use the `completion-at-point' command,
236 rather than implementing separate completion commands.
238 *** `completion-at-point' now handles tags and semantic completion.
240 *** Completion in a non-minibuffer now tries to detect the end of completion
241 and pops down the *Completions* buffer accordingly.
243 *** New option `completion-cycle-threshold' allows completion cycling.
245 *** New option `completion-category-overrides' for overriding the
246 default completion style in certain circumstances.
248 *** New completion style `substring'.
250 *** Completion of buffer names uses `substring' completion by default.
252 *** The option `widget-complete-field' has been removed.
256 *** The first time you try sending mail, Emacs asks for a mail method.
257 This is implemented by a new default for `send-mail-function', which
258 is `sendmail-query-once'. This offers to use the smtpmail package, or
259 to use the old defaults relying on external mail facilities
260 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
261 `mailclient-send-it' on Windows).
263 *** Typing C-c m in the buffer made by M-x report-emacs-bug transfers
264 the report to your desktop's preferred mail client, if there is one.
265 This uses either the "xdg-email" utility, or Mac OS's "open" command.
267 *** See Changes in Specialized Modes and Packages for SMTPmail changes
268 and Mail mode changes
270 ** Emacs server and client changes
272 *** New option `server-port' specifies the port for TCP Emacs servers.
274 *** New emacsclient argument -q/--quiet suppresses some status messages.
276 *** New emacsclient argument --frame-parameters specifies the frame
277 parameters of any newly-created graphical frame.
279 *** If emacsclient shuts down due to Emacs signaling an error,
280 its exit status is 1.
282 *** New emacsclient argument --parent-id ID.
283 This opens a client frame in parent X window ID, via XEmbed, similar
284 to the --parent-id argument to Emacs.
286 ** Internationalization changes
288 *** Emacs now supports display and editing of bidirectional text.
289 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
290 displayed in the correct visual order as expected by users of those
291 scripts. The display reordering is a "full bidirectionality" class
292 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
293 with no RTL text should look exactly the same as before.
295 **** New buffer-local variable `bidi-display-reordering'.
296 To disable display reordering in a buffer, change this to nil.
298 **** New buffer-local variable `bidi-paragraph-direction'.
299 If nil (the default), Emacs determines the base direction of each
300 paragraph from its text, as specified by the UBA. Setting the value
301 to `right-to-left' or `left-to-right' forces a base direction on each
304 Paragraphs with right-to-left base direction are displayed starting at
305 the right window edge.
307 *** Enhanced support for characters with no glyphs in available fonts,
308 or, on text terminals, characters that cannot be encoded by the
309 terminal coding system. The new option `glyphless-char-display-control'
310 specifies how to display them: as a hexadecimal code in a box, a thin
311 1-pixel space, an empty box, etc.
313 *** New input methods: farsi, farsi-translit, bulgarian-alt-phonetic.
315 *** `nobreak-char-display' now also highlights Unicode hyphen chars
318 *** New Hebrew translation of the Emacs Tutorial.
319 Type `C-u C-h t' to choose it in case your language setup doesn't
320 automatically select it.
322 ** An Emacs Lisp package manager is now included.
323 This is a convenient way to download and install additional packages,
324 from a package repository at http://elpa.gnu.org.
326 *** M-x list-packages shows a list of packages, which can be
327 selected for installation.
329 *** New command `describe-package', bound to `C-h P'.
331 *** By default, all installed packages are loaded automatically when
332 Emacs starts up. To disable this, set `package-enable-at-startup' to
333 nil. To specify the packages to load, customize `package-load-list'.
335 ** Custom theme changes
337 *** New command `M-x customize-themes', which provides a convenient
338 interface for enabling and disabling Custom themes.
340 *** New option `custom-theme-load-path' is the load path for themes.
341 Emacs no longer looks for Custom themes in `load-path'. The default
342 value of `custom-theme-load-path' says to look for themes in
343 `custom-theme-directory', followed by a subdirectory of
344 `data-directory' named "themes/", which contains a small selection of
345 built-in Custom themes.
347 *** New option `custom-safe-themes' records known-safe theme files.
348 If a theme is not in this list, Emacs queries before loading it, and
349 offers to save the theme to `custom-safe-themes' automatically. By
350 default, all themes included in Emacs are treated as safe.
352 ** Improved GTK integration
354 *** GTK scroll-bars are now placed on the right by default.
355 The function `set-scroll-bar-mode' can change this.
357 *** GTK tool bars can have just text, just images or images and text.
358 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
359 the default is taken from desktop settings.
361 *** GTK tool bars can be placed on any edge of the frame.
362 The frame-parameter tool-bar-position controls this. It takes the
363 values top, left, right or bottom. The Options => Show/Hide menu has
366 *** The default colors for selected text (the `region' face) are taken
367 from the GTK theme when Emacs is built with GTK.
369 *** Emacs uses GTK tooltips by default if built with GTK.
370 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
372 ** Graphical interface changes
374 *** On graphical displays, the mode-line no longer ends in dashes.
375 Also, the first dash (which does not indicate anything) is just
376 displayed as a space.
378 *** `menu-bar-select-buffer-function' lets you choose another operation
379 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
381 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
382 built with Xft. These fonts can be set via X resources, for example:
383 Emacs.pane.menubar.font: Courier-12
387 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
388 or if it receives a SIGINT signal in batch mode.
390 *** `kill-emacs-hook' is now also run in batch mode.
391 Third-party code which adds to `kill-emacs-hook' should check if they
392 do the right thing in batch mode.
396 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
397 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
398 of buffer at first key-press (instead they move to top/bottom of buffer)
399 when `scroll-error-top-bottom' is non-nil.
401 *** New option `scroll-error-top-bottom' (see above).
403 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
404 scroll a line instead of full screen.
406 *** New property `scroll-command' should be set on a command's symbol to
407 define it as a scroll command affected by `scroll-preserve-screen-position'.
409 *** If you customize `scroll-conservatively' to a value greater than 100,
410 Emacs will never recenter point in the window when it scrolls due to
411 cursor motion commands or commands that move point (e.f., `M-g M-g').
412 Previously, you needed to use `most-positive-fixnum' as the value of
413 `scroll-conservatively' to achieve the same effect.
415 *** "Aggressive" scrolling now honors the scroll margins.
416 If you customize `scroll-up-aggressively' or
417 `scroll-down-aggressively' and move point off the window, Emacs now
418 scrolls the window so as to avoid positioning point inside the scroll
421 ** Basic SELinux support has been added.
422 This requires Emacs to be linked with libselinux at build time.
424 *** Emacs preserves the SELinux file context when backing up.
425 Also, the function `copy-file' has an extra optional argument for
426 preserving SELinux context, and the return value of `backup-buffer'
427 now includes the SELinux context.
429 *** New functions `file-selinux-context' and `set-file-selinux-context'
430 get and set the SELinux context of a file.
434 *** `delete-by-moving-to-trash' now only affects commands that specify
435 trashing. This avoids inadvertently trashing temporary files.
437 *** Calling `delete-file' or `delete-directory' with a prefix argument
438 now forces true deletion, regardless of `delete-by-moving-to-trash'.
440 ** File- and directory-local variable changes
442 *** You can stop directory local vars from applying to subdirectories.
443 Add an element (subdirs . nil) to the alist portion of any variables
444 settings to indicate that the section should not apply to
447 *** Directory local variables can apply to some file-less buffers.
448 Affected modes include dired, vc-dir, and log-edit. For example,
449 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
450 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
451 `hack-dir-local-variables-non-file-buffer' to support this.
453 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
454 Instead, use "eval: (minor-mode 1)".
456 *** The variable `inhibit-first-line-modes-regexps' has been renamed
457 to `inhibit-local-variables-regexps'. As the name suggests, it now
458 applies to ALL file local variables, not just -*- lines. The
459 associated `inhibit-first-line-modes-suffixes' has been renamed in the
464 *** The `quit-window' command now restores the last buffer displayed
465 in the quitted window.
467 *** Resizing an Emacs frame now preserves proportional window sizes,
468 modulo restrictions like window minimum sizes and fixed-size windows.
470 *** The behavior of `display-buffer' is now customizable in detail.
472 **** New option `display-buffer-base-action' specifies a list of
473 user-determined display "actions" (functions and optional arguments
474 for choosing the displaying window).
476 This takes precedence over the default display action, which is
477 specified by `display-buffer-fallback-action'.
479 **** New option `display-buffer-alist' maps buffer name regexps to
480 display actions, taking precedence over `display-buffer-base-action'.
482 *** New option `window-combination-limit'.
483 The new option `window-combination-limit' allows to return the space
484 obtained for resizing or creating a window more reliably to the window
485 from which such space was obtained.
487 *** New option `window-combination-resize'.
488 The new option `window-combination-resize' allows to split a window that
489 otherwise cannot be split because it's too small by stealing space from
490 other windows in the same combination. Subsequent resizing or deletion
491 of the window will resize all windows in the same combination as well.
493 *** New option `frame-auto-hide-function' lets you choose between
494 iconifying or deleting a frame when burying a buffer in a dedicated
495 frame, or quitting a window showing a buffer in a frame of its own.
497 *** New commands `maximize-window' and `minimize-window'.
498 These maximize and minimize the size of a window within its frame.
500 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
501 These functions allow to navigate through the live buffers that have
502 been shown in a specific window.
504 ** Minibuffer changes
506 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
507 This is handy for minibuffer-only frames, and is also used for the feature
508 where mouse-1 pops up *Messages*"', which can now easily be changed.
510 *** Minibuffers set `truncate-lines' to nil.
511 If you want to change the value to something else, you could use
512 for example `minibuffer-setup-hook'.
514 ** `auto-mode-case-fold' is now enabled by default.
516 ** `backup-by-copying-when-mismatch' now defaults to t.
518 ** New basic faces `error', `warning', `success'.
519 These are used to highlight text indicating failure, caution or
520 successful operation.
522 ** New option `list-colors-sort' defines the color sort order
523 for `list-colors-display'.
525 ** The variable `focus-follows-mouse' now always defaults to nil.
528 * Editing Changes in Emacs 24.1
532 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
535 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
538 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
540 ** New commands `count-words-region' and `count-words'.
542 *** M-= is bound to `count-words-region', not `count-lines-region'.
543 The `count-words-region' command, when called interactively, reports
544 the number of lines, words, and characters in the region. It is a
545 superset of the old `count-lines-region', which is now an obsolete
548 ** The command `just-one-space' (M-SPC), if given a negative argument,
549 also deletes newlines around point.
553 *** New option `delete-active-region'.
554 If non-nil, [delete] and DEL delete the region if it is active and no
555 prefix argument is given. If set to `kill', those commands kill
558 *** New command `delete-forward-char', bound to [delete].
559 This is meant for interactive use, and obeys `delete-active-region'.
560 The command `delete-char' does not obey `delete-active-region'.
562 *** `delete-backward-char' is now a Lisp function.
563 Apart from obeying `delete-active-region', its behavior is unchanged.
564 However, the byte compiler now warns if it is called from Lisp; Lisp
565 callers should use delete-char with a negative argument instead.
567 *** The option `mouse-region-delete-keys' has been deleted.
569 ** Selection changes.
571 The default handling of clipboard and primary selections has been
572 changed to conform with modern X applications. In short, most
573 commands for killing and yanking text now use the clipboard, while
574 mouse commands use the primary selection.
576 In the following, we provide a list of these changes, followed by a
577 list of steps to get the old behavior back if you prefer that.
579 *** `select-active-regions' now defaults to t.
580 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
581 the kill ring. The selected text is put in the primary selection, if
582 the system possesses a separate primary selection facility (e.g. X).
584 **** `select-active-regions' also accepts a new value, `only'.
585 This means to only set the primary selection for temporarily active
586 regions (usually made by mouse-dragging or shift-selection);
587 "ordinary" active regions, such as those made with C-SPC followed by
588 point motion, do not alter the primary selection.
590 **** `mouse-drag-copy-region' now defaults to nil.
592 *** mouse-2 is now bound to `mouse-yank-primary'.
593 This pastes from the primary selection, ignoring the kill-ring.
594 Previously, mouse-2 was bound to `mouse-yank-at-click'.
596 *** `x-select-enable-clipboard' now defaults to t on all platforms.
598 *** `x-select-enable-primary' now defaults to nil.
599 Thus, commands that kill text or copy it to the kill-ring (such as
600 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
602 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
603 exactly equivalent to M-w, C-w, and C-y respectively.
605 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
606 non-nil by default, as Windows does not support the primary selection
607 between applications.
609 *** To return to the previous behavior, do the following:
611 **** Change `select-active-regions' to nil.
612 **** Change `mouse-drag-copy-region' to t.
613 **** Change `x-select-enable-primary' to t (on X only).
614 **** Change `x-select-enable-clipboard' to nil.
615 **** Bind `mouse-yank-at-click' to mouse-2.
617 *** Support for X cut buffers has been removed.
619 *** X clipboard managers are now supported.
620 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
622 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
623 in the current rectangle. With a prefix argument, this prompts for a
624 number to count from and for a format string.
626 ** `redisplay-dont-pause' now defaults to t.
627 This makes Emacs feel more responsive to editing commands that arrive
628 at high rate, e.g. if you lean on some key, because stopping redisplay
629 in the middle (when this variable is nil) forces more expensive
630 updates later on, and Emacs appears to be unable to keep up.
632 ** The behavior of <TAB> for active regions in Text mode has changed.
633 In Text and related modes, typing <TAB> (`indent-for-tab-command')
634 when the region is active causes Emacs to indent all the lines in the
635 region, aligning them with the line previous to the first line in the
636 region (or with the left margin if there is no previous line).
638 ** When `occur' is called with a prefix argument, matching strings are
639 collected into the `*Occur*' buffer without line numbers. If there
640 are parenthesized subexpressions in the specified regexp, `occur'
641 reads replacement text that may contain \\& and \\N whose convention
642 follows `replace-match'.
645 * Changes in Specialized Modes and Packages in Emacs 24.1
647 ** Archive Mode has basic support for browsing and updating 7z archives.
651 *** BibTeX mode now supports biblatex.
652 Use the variable `bibtex-dialect' to select different BibTeX dialects.
653 `bibtex-entry-field-alist' is now an obsolete alias for
654 `bibtex-BibTeX-entry-alist'.
656 *** New command `bibtex-search-entries', bound to C-c C-a.
658 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
660 *** New variable `bibtex-search-entry-globally'.
664 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
666 *** The default browser used by the package is now the "xdg-open" program,
667 on platforms that support it. This calls your desktop's preferred browser.
669 ** Calendar, Diary, and Appt
671 *** Diary entries can contain non-printing "comments".
672 See the variable `diary-comment-start'.
674 *** Appointments can specify their individual warning times.
675 See the variable `appt-warning-time-regexp'.
677 *** The function specified by `appt-disp-window-function' may be passed
678 lists of arguments if multiple appointments are due at similar times.
679 If you are using a custom function for this, you should update it.
681 *** New function `diary-hebrew-birthday'.
683 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
684 may no longer be nil, but must all be strings.
686 *** The obsolete (since Emacs 22.1) method of enabling the appt
687 package by adding `appt-make-list' to `diary-hook' has been removed.
688 Use `appt-activate' instead.
690 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
691 appt-issue-message (use the function appt-activate)
692 appt-visible/appt-msg-window (use the variable appt-display-format)
694 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
695 view-diary-entries, list-diary-entries, show-all-diary-entries
699 *** New feature to "guess" the style in an existing buffer.
700 The main entry point is M-x c-guess.
702 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
704 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
705 Thus C-M-a will, by default, go to the beginning of the immediate function,
708 *** "Macros with semicolons" can be registered for correct indentation.
709 Where such a macro ends a line (no semicolon) the next statement is no longer
710 parsed as a statement continuation.
712 ** Comint and modes derived from it use the standard completion code.
716 *** Compilation mode can be used without Font Lock mode.
717 `compilation-parse-errors-function' is now obsolete.
719 *** New variable `compilation-filter-start', which is bound while
720 `compilation-filter-hook' runs. It records the start position of the
721 text inserted by `compilation-filter'.
723 *** `compilation-error-screen-columns' and `compilation-first-column'
724 are obeyed in the editing buffer. So programming language modes can
725 set them, whereas previously only the value in the *Compilation*
730 *** Customize buffers now contain a search field.
731 The search is performed using `customize-apropos'.
732 To turn off the search field, set `custom-search-field' to nil.
734 *** Custom options now start out hidden if at their default values.
735 Use the arrow to the left of the option name to toggle visibility.
737 *** custom-buffer-sort-alphabetically now defaults to t.
739 *** The color widget now has a "Choose" button, which allows you to
740 choose a color via `list-colors-display'.
744 *** It is now possible to access buses other than the default system
747 *** The `dbus-register-method' and `dbus-register-property' functions
748 optionally do not register names.
750 *** The new function `dbus-register-service' registers a known service
751 name on a D-Bus without also registering a property or a method.
755 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
756 if called with a prefix argument, read a file name from the minibuffer
757 instead of using the current buffer.
759 *** The "dired local variables" feature of Dired-x is obsolete.
760 The standard directory local variables feature replaces it.
764 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
765 controlling attempts to autojoin a channel.
767 *** New variable `erc-coding-system-precedence': If we use `undecided'
768 as the server coding system, this variable will then be consulted.
769 The default is to decode strings that can be decoded as utf-8 as
770 utf-8, and do the normal `undecided' decoding for the rest.
774 *** The default value of `eshell-directory-name' has changed
775 to be an "eshell" directory in `user-emacs-directory'.
776 The old "~/.eshell/" directory is still used if it exists, though.
780 *** The M-x gdb command now uses the GDB Machine Interface protocol.
781 It now supports multithread non-stop debugging and simultaneous
782 debugging of several threads.
786 *** RET (`image-toggle-animation') toggles animation, if applicable.
787 Animation plays once, unless the option `image-animate-loop' is non-nil.
791 *** New command M-x info-display-manual displays a named Info manual.
792 If that manual is already visited in some Info buffer, it displays
793 that buffer. (This is handy if you have many manuals in many *info*
794 buffers, and don't remember the name of the buffer visiting the manual
795 you want to consult.) Otherwise, it loads and displays the manual.
797 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
798 This is for compatibility with the stand-alone Info reader program,
799 and also because `Info-edit' is a rarely used command that is disabled
802 ** Mail mode changes (not Message mode)
804 *** New command M-x mail-add-attachment for adding MIME attachments
806 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
807 (Its name is misleading, since it has nothing to do with MIME
808 attachments.) The old name is now an obsolete alias to the new name.
810 ** MH-E has been upgraded to MH-E version 8.3.1.
811 See MH-E-NEWS for details.
813 ** Modula-2 mode provides auto-indentation.
815 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
817 ** nXML mode no longer binds C-RET to `nxml-complete'.
818 Completion is now performed via `completion-at-point', bound to C-M-i
819 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
820 default), this performs tag completion.
822 ** Prolog mode has been completely revamped, with lots of additional
823 functionality such as more intelligent indentation, electricity,
824 support for more variants, including Mercury, and a lot more.
828 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
829 in the Rmail incoming message.
831 *** The variable `rmail-message-filter' no longer has any effect.
832 This change was made in Emacs 23.1 but was not advertised at the time.
833 Try using `rmail-show-message-hook' instead.
837 *** M-x shell prompts for the shell path name if the default directory
838 is a remote file name and neither the environment variable $ESHELL nor
839 the variable `explicit-shell-file-name' is set.
841 *** TAB is now bound to the standard `completion-at-point' command,
842 which now implements the pcomplete rules for shell command completion.
846 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
847 if the mail server supports them. This uses either built-in GnuTLS
848 support, or the starttls.el library. Customize `smtpmail-stream-type'
851 *** The variable `smtpmail-auth-credentials' has been removed.
852 By default, the information is now stored in the file ~/.authinfo.
853 This was the default value of smtpmail-auth-credentials. If you had
854 customized smtpmail-auth-credentials to a list of user names and
855 passwords, those settings are not used. During your first connection
856 to the smtp server, Emacs will prompt for the user name and password,
857 and offer to save them to ~/.authinfo. Or you can manually copy the
858 credentials to ~/.authinfo. For example, if you had
860 (setq smtpmail-auth-credentials
861 '(("mail.example.org" 25 "jim" "s!cret")))
863 then the equivalent line in ~/.authinfo would be
865 machine mail.example.org port 25 login jim password s!cret
867 See the auth-source manual for more information, e.g. on encrypting
868 the credentials file.
870 *** The variable `smtpmail-starttls-credentials' has been removed.
871 If you had that set, you need to put
873 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
875 in your ~/.authinfo file instead.
879 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
880 and `sql-oracle-scan-on'.
882 *** New options controlling prompting for login parameters.
883 Each supported product has a custom variable `sql-*-login-params',
884 which is a list of the parameters to be prompted for before a
885 connection is established.
887 *** The command `sql-product-interactive' now takes a prefix argument,
888 which causes it to prompt for an SQL product.
890 *** Product-specific SQL interactive commands now take prefix arguments.
891 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
892 given a prefix argument, prompt for a name for the SQL interactive
893 buffer. This reduces the need for calling `sql-rename-buffer'.
895 *** SQL interactive modes suppress command continuation prompts, and
896 replace tabs with spaces. The first change impacts multiple line SQL
897 statements entered with C-j between each line, statements yanked into
898 the buffer and statements sent with `sql-send-*' functions. The
899 second prevents the MySQL and Postgres interpreters from listing
900 object name completions when sent text via `sql-send-*' functions.
902 *** New command `sql-connect' starts a predefined SQLi session,
903 using the login parameters from `sql-connection-alist'.
905 *** New "Save Connection" menu item in SQLi buffers.
906 This gathers the login params specified for the SQLi session, if it
907 was not started by a connection, and saves them as a new connection.
909 *** New commands for listing database objects and details:
910 sql-list-all and sql-list-table.
912 *** An API for manipulating SQL product definitions has been added.
916 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
920 *** New inline access method "ksu" (kerberized su).
922 *** The following access methods are discontinued: "ssh1_old",
923 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
925 *** The user option `remote-file-name-inhibit-cache' controls whether
926 remote file attributes are cached for better performance.
928 *** The option `ange-ftp-binary-file-name-regexp' has changed its
931 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
932 for remote machines which support SELinux.
934 ** New function `url-queue-retrieve', which behaves like url-retrieve,
935 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
936 the degree of parallelism.
938 ** VC and related modes
940 *** Support for pulling on distributed version control systems.
941 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
942 supported (currently with Bzr, Git, and Mercurial), to update the
943 current branch and working tree. A prefix argument means to prompt
944 the user for specifics, e.g. a pull location.
946 *** `vc-update' is now an alias for `vc-pull'.
948 *** Support for merging on distributed version control systems.
949 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
950 is supported (currently with Bzr, Git, and Mercurial), to merge
951 changes from another branch into the current one. It prompts for
952 specifics, e.g. a merge source.
954 *** New option `vc-revert-show-diff' controls whether `vc-revert'
955 shows a diff while querying the user. It defaults to t.
957 *** Log entries in some Log View buffers can be toggled to display a
958 longer description by typing RET (log-view-toggle-entry-display).
959 This is currently supported for Bzr, Git, and Mercurial (to support
960 another backend, define a `log-view-expanded-log-entry-function').
961 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
962 use this to display the full log entry for the revision at point.
964 *** New command `vc-ediff' allows visual comparison of two revisions
965 of a file similar to `vc-diff', but using ediff backend.
967 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
968 this was not advertised at the time.
970 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
971 Since Emacs 23, it has done the same thing as `toggle-read-only', but
972 this was not advertised at the time.
978 *** erc-hecomplete.el (use erc-pcomplete.el instead)
980 *** partial-completion-mode (complete.el) is obsolete.
981 You can get a comparable behavior with:
982 (setq completion-styles '(partial-completion initials))
983 (setq completion-pcm-complete-word-inserts-delimiters t)
985 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
987 *** pgg is obsolete (use EasyPG instead).
989 *** sregex.el is obsolete, since rx.el is a strict superset.
991 *** s-region.el and pc-select.el are obsolete.
992 They are superseded by shift-select-mode, enabled by default since 23.1.
994 *** vc-mcvs.el is obsolete (for lack of a maintainer).
998 *** The Landmark game is now invoked with `landmark', not `lm'.
999 Its functions and variables have been similarly renamed.
1001 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
1002 (This interfered with cua-mode.)
1004 *** f90.el has some support for Fortran 2008 syntax.
1006 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
1008 *** New command `nato-region' converts text to NATO phonetic alphabet.
1011 * New Modes and Packages in Emacs 24.1
1013 ** Occur Edit mode applies edits made in *Occur* buffers to the
1014 original buffers. It is bound to "e" in Occur mode.
1016 ** New global minor mode electric-pair-mode.
1017 When enabled, typing an open parenthesis automatically inserts the
1018 matching closing one.
1020 ** New global minor mode electric-indent-mode.
1021 When enabled, typing certain characters triggers reindentation.
1022 Major modes wishing to use this can set electric-indent-chars or
1023 electric-indent-functions.
1025 ** New global minor mode electric-layout-mode.
1026 When enabled, typing certain characters automatically inserts newlines.
1027 Major modes wishing to use this can set electric-layout-rules.
1029 ** tabulated-list.el provides a generic major mode for tabulated data,
1030 from which other modes can be derived.
1032 ** pcase.el provides the ML-style pattern matching macro `pcase'.
1034 ** secrets.el is an implementation of the Secret Service API, an
1035 interface to password managers like GNOME Keyring or KDE Wallet. The
1036 Secret Service API requires D-Bus for communication. The command
1037 `secrets-show-secrets' offers a buffer with a visualization of the
1040 ** notifications.el provides an implementation of the Desktop
1041 Notifications API. It requires D-Bus for communication.
1043 ** soap-client.el supports access to SOAP web services from Emacs.
1044 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
1046 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
1048 ** New emacs-lock.el package.
1049 The previous version has been moved to obsolete/old-emacs-lock.el.
1050 Now, there is a proper minor mode `emacs-lock-mode'. Protection
1051 against exiting Emacs and killing the buffer can be set separately.
1052 The mechanism for automatically turning off protection for buffers
1053 with dead inferior processes has been generalized.
1056 * Incompatible Lisp Changes in Emacs 24.1
1058 ** Passing a nil argument to a minor mode function call now ENABLES
1059 the minor mode unconditionally. This is so that you can write e.g.
1061 (add-hook 'text-mode-hook 'foo-mode)
1063 to enable foo-mode in Text mode buffers, removing the need for
1064 `turn-on-foo-mode' style functions. This affects all mode commands
1065 defined by `define-minor-mode'. If called interactively, the mode
1066 command still toggles the minor mode.
1068 ** The return value of `backup-buffer' has changed.
1069 It is now a list of three elements, where the second element is a list
1070 describing the original file's SELinux context. If Emacs or the
1071 system lacks SELinux support, the context list is (nil nil nil nil).
1072 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
1074 ** `char-direction-table' and the `char-direction' function were deleted.
1075 They were buggy and inferior to the new support of bidirectional
1076 editing introduced in Emacs 24. If you need the bidirectional
1077 properties of a character, use `get-char-code-property' with the last
1078 argument `bidi-class'.
1080 ** `copy-directory' now copies the source directory as a subdirectory
1081 of the target directory, if the latter is an existing directory. The
1082 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
1083 the contents directly into a pre-existing target directory.
1085 ** For mouse click input events in the text area, the Y pixel
1086 coordinate in the POSITION list now counts from the top of the text
1087 area, excluding any header line. Previously, it counted from the top
1090 ** Support for "old-style" backquotes, obsolete for 10+ years, has
1091 been further reduced. Now a backquote not followed by a space is
1092 always treated as a "new-style" backquote. Please remove all
1093 "old-style" backquotes from your code. If your code uses backquotes
1094 as documented in the Elisp manual, and compiles without warning, then
1095 you have nothing to do in this regard. Code not following the
1096 appropriate conventions may fail to compile.
1098 The most common cause of trouble seems to be an old-style backquote
1099 followed by a newline. Another cause of trouble is vector notation
1100 for key sequence notation: instead of [(control ,)] and [(control ')],
1101 you should write [(control ?,)] and [(control ?')], which will work in
1104 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
1105 was not advertised at the time. The function `custom-initialize-delay'
1106 replaced all known uses.
1108 ** `view-buffer' now treats special mode-class in the same way that
1109 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
1110 major mode is special).
1112 ** Menu and tool bar changes
1114 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
1115 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
1116 With these alist entries omitted, `make-frame' checks the value of the
1117 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
1118 a menu-bar or tool-bar, respectively. If the alist entries are added,
1119 they override the value of `menu-bar-mode'/`tool-bar-mode'.
1121 *** The menu bar bindings's caches are not used any more.
1122 Use (where-is-internal <def> nil t) instead.
1124 ** Regions created by mouse dragging are now normal active regions,
1125 similar to those created by shift-selection (see Selection changes
1126 above). In previous Emacs versions, these regions were delineated by
1127 `mouse-drag-overlay'; that variable has been removed.
1129 ** The fourth argument of `filter-buffer-substring' has been removed.
1130 If you want to remove text properties from the final result, simply
1131 pass the result through substring-no-properties.
1133 ** cl.el no longer provides `cl-19'.
1135 ** The following obsolete functions and aliases have been removed
1136 (the appropriate new function is given in parentheses; "not needed"
1137 means you can just remove all calls to the function in question):
1139 *** `comint-kill-output' (`comint-delete-output')
1140 *** `decompose-composite-char' (`char-to-string')
1141 *** `outline-visible' (`outline-invisible-p')
1142 *** `internal-find-face' (`facep')
1143 *** `internal-get-face' (`facep and check-face')
1144 *** `frame-update-faces' (not needed)
1145 *** `frame-update-face-colors' (`frame-set-background-mode')
1146 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
1147 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
1148 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
1149 *** `x-make-font-bold-italic' (`make-face-bold-italic')
1150 *** `x-make-font-unbold' (`make-face-unbold')
1151 *** `x-make-font-unitalic' (`make-face-unitalic')
1152 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
1153 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
1154 *** `iswitchb-default-keybindings' (`iswitchb-mode')
1155 *** `char-bytes' (== 1)
1156 *** `isearch-return-char' (`isearch-printing-char')
1157 *** `make-local-hook' (not needed)
1158 *** `set-screen-height' (`set-frame-height')
1159 *** `set-screen-width' (`set-frame-width')
1161 ** The following obsolete variables and varaliases have been removed
1162 (the appropriate new variable is given in parentheses):
1164 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
1165 *** `vc-header-alist' (`vc-BACKEND-header')
1166 *** `directory-sep-char' (== ?/)
1167 *** `font-lock-defaults-alist' (`font-lock-defaults')
1168 *** `e' (`float-e').
1170 ** The following obsolete files were removed:
1171 sc.el, x-menu.el, rnews.el, rnewspost.el
1173 ** The format of the finder-inf.el file has changed, since the Finder
1174 mechanism is now based on the package system. The variable
1175 `finder-package-info' is replaced by `package--builtins' and
1176 `finder-keywords-hash'.
1178 ** When generating autoloads, `update-directory-autoloads' no longer
1179 assumes every inspected file is in your `load-path'. It instead
1180 generates relative names according to the current `load-path'.
1183 * Lisp changes in Emacs 24.1
1185 ** Code can now use lexical scoping by default instead of dynamic scoping.
1186 The `lexical-binding' variable enables lexical scoping for local
1187 variables. It is typically set via a file-local variable in the first
1188 line of the file, in which case it applies to all the code in that
1191 *** `eval' takes a new optional argument `lexical' to choose the new lexical
1192 binding instead of the old dynamic binding mode.
1194 *** Lexically scoped interpreted functions are represented with a new form
1195 of function value which looks like (closure ENV ARGS &rest BODY).
1197 *** New macro `letrec' to define recursive local functions.
1199 *** `defvar' and `defconst' now mark the variable as special (dynamic).
1200 So do `defcustom' and other forms that call `defvar' as a subroutine.
1202 *** New function `special-variable-p' to check whether a variable is
1203 declared as dynamically bound.
1205 ** An Emacs Lisp testing tool is now included.
1206 Emacs Lisp developers can use this tool to write automated tests for
1207 their code. See the ERT info manual for details.
1209 ** Changes for bidirectional display and editing
1211 *** New function `current-bidi-paragraph-direction'.
1212 This returns the base direction of the paragraph at point.
1214 *** New function `bidi-string-mark-left-to-right'.
1215 Given a string containing characters from right-to-left scripts, this
1216 function returns another string which can be safely inserted into a
1217 buffer, such that any following text will be always displayed to the
1218 right of that string. (This works by appending an invisible Unicode
1219 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
1221 This is useful when the buffer has overall left-to-right paragraph
1222 direction and you need to insert a string whose contents are not known
1223 in advance, without disrupting the layout of the line.
1227 *** Window tree functions are accessible in Elisp.
1228 Functions are provided to return the parent, siblings or child windows
1229 of any window including internal windows (windows not associated with a
1230 buffer) in the window tree.
1232 **** New function `window-valid-p' gives non-nil for live and internal
1235 **** Window manipulation can deal with internal windows.
1236 Many window handling functions like `split-window', `delete-window', or
1237 `delete-other-windows' as well as the window resizing functions can now
1238 act on any window including internal ones.
1240 *** window-total-height/-width vs window-body-height/-width.
1241 The function `window-height' has been renamed to `window-total-height'
1242 and `window-width' has been renamed to `window-body-width'. The old
1243 names are provided as aliases. Two new functions `window-total-width'
1244 and `window-body-height' are provided.
1246 *** Window parameters specific to window handling functions.
1247 For each window you can specify a parameter to override the default
1248 behavior of a number of functions like `split-window', `delete-window'
1249 and `delete-other-windows'. The variable `ignore-window-parameters'
1250 allows to ignore processing such parameters.
1252 *** New semantics of third argument of `split-window'.
1253 The third argument of `split-window' has been renamed to SIDE and can be
1254 set to any of the values 'below, 'right, 'above, or 'left to make the
1255 new window appear on the corresponding side of the window that shall be
1256 split. Any other value of SIDE will cause `split-window' to split the
1257 window into two side-by-side windows as before.
1259 *** Window resizing functions.
1260 A new standard function for resizing windows called `window-resize' has
1261 been introduced. This and all other functions for resizing windows no
1262 longer delete any windows when they become too small.
1264 *** Deleting the selected window now selects the most recently selected
1265 live window on that frame instead.
1267 *** `adjust-window-trailing-edge' adjustments.
1268 `adjust-window-trailing-edge' can now deal with fixed-size windows and
1269 is able to resize other windows if a window adjacent to the trailing
1270 edge cannot be shrunk any more. This makes its behavior more similar to
1271 that of Emacs 21 without compromising, however, its inability to delete
1272 windows which was introduced in Emacs 22.
1274 *** Window-local buffer lists.
1275 Windows now have local buffer lists. This means that removing a buffer
1276 from display in a window will preferably show the buffer previously
1277 shown in that window with its previous window-start and window-point
1278 positions. This also means that the same buffer may be automatically
1279 shown twice even if it already appears in another window.
1281 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
1282 which if non-nil requires the buffer to be displayed in the currently
1283 selected window, signaling an error otherwise. If nil, another window
1284 can be used, e.g. if the selected one is strongly dedicated.
1286 *** `split-window-vertically' and `split-window-horizontally' renamed
1287 to `split-window-below' and `split-window-right' respectively.
1288 The old names are kept as aliases.
1292 **** The second arg to `display-buffer' and `pop-to-buffer' is now
1293 named ACTION, and takes a display action of the same form as
1294 `display-buffer-base-action' (see Changes, above). A non-nil,
1295 non-list value is treated specially, as the old meaning.
1297 **** New variable `display-buffer-overriding-action'.
1299 **** The procedure of `display-buffer' etc. to choose a window is
1300 determined by combining `display-buffer-overriding-action',
1301 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
1302 and `display-buffer-fallback-action'. The second and fourth of these
1303 are user-customizable variables.
1305 See the docstring of `display-buffer' for details.
1307 *** New functions `window-state-get' and `window-state-put'.
1308 These functions allow to save and restore the state of an arbitrary
1309 frame or window as an Elisp object.
1313 *** New variable `completion-extra-properties' used to specify extra
1314 properties of the current completion:
1315 - :annotate-function, same as the old completion-annotate-function.
1316 - :exit-function, function to call after completion took place.
1318 *** Functions on `completion-at-point-functions' can return any of the
1319 properties valid for `completion-extra-properties'.
1321 *** `completion-annotate-function' is obsolete.
1323 *** New `metadata' method for completion tables. The metadata thus returned
1324 can specify various details of the data returned by `all-completions':
1325 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
1326 used to select a style in completion-category-overrides.
1327 - `annotation-function' to add annotations in *Completions*.
1328 - `display-sort-function' to specify how to sort entries in *Completions*.
1329 - `cycle-sort-function' to specify how to sort entries when cycling.
1331 *** `minibuffer-local-filename-must-match-map' is not used any more.
1332 Instead, the bindings in `minibuffer-local-filename-completion-map'
1333 are combined with `minibuffer-local-must-match-map'.
1335 *** New variable `completing-read-function' allows overriding the
1336 behavior of `completing-read'.
1338 ** `glyphless-char-display' can now distinguish between graphical and
1339 text terminal display, via a char-table entry that is a cons cell.
1341 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
1342 Instead, the offending function is removed.
1346 *** New function `run-hook-wrapped' for running an abnormal hook by
1347 passing the hook functions as arguments to a "wrapping" function.
1348 Like `run-hook-with-args-until-success', it stops at the first
1349 non-nil return value.
1351 *** New macro `with-wrapper-hook' for running an abnormal hook as a
1352 set of "wrapping" filters, similar to around advice.
1353 (A version of this macro was actually added in Emacs 23.2 but was not
1354 advertised at the time.)
1358 *** New macro `condition-case-unless-debug' (this was actually added in
1359 Emacs 23.1 as condition-case-no-debug, but not advertised)
1361 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
1363 *** Variable `stack-trace-on-error' removed.
1365 *** The debugger can now "continue" from an error, which means it will
1366 jump to the error handler as if the debugger had not been invoked
1367 instead of jumping all the way to the top-level.
1369 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
1370 This can be useful when `inhibit-quit' is set.
1372 ** The new function `server-eval-at' allows evaluation of Lisp forms on
1373 named Emacs server instances.
1375 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
1376 to redirect STDOUT to a file.
1378 ** The function `format-time-string' now supports the %N directive,
1379 for higher-resolution time stamps.
1381 ** New input reading functions
1383 *** New function `read-char-choice' reads a restricted set of
1384 characters, discarding any inputs not inside the set.
1386 *** The command `read-color' now requires a match for a color name
1387 or RGB triplet, instead of signaling an error if the user provides
1390 **** `facemenu-read-color' is now an alias for `read-color'.
1392 ** `image-library-alist' is renamed to `dynamic-library-alist'.
1393 The variable is now used to load all kind of supported dynamic libraries,
1394 not just image libraries. The previous name is still available as an
1397 ** Syntax parsing changes
1399 *** New variable `syntax-propertize-function'.
1400 This replaces `font-lock-syntactic-keywords' which is now obsolete.
1401 This allows syntax-table properties to be set independently from font-lock:
1402 just call syntax-propertize to make sure the text is propertized.
1403 Together with this new variable come a new hook
1404 syntax-propertize-extend-region-functions, as well as two helper functions:
1405 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
1406 as-is; and syntax-propertize-rules which provides a new way to specify
1409 *** Syntax tables support a new "comment style c" additionally to style b.
1411 ** New hook `post-self-insert-hook', run after `self-insert-command'.
1413 ** frame-local variables cannot be let-bound any more.
1415 ** Major and minor mode changes
1417 *** `set-auto-mode' now respects mode: local variables at the end of files,
1418 as well as those in the -*- line.
1420 *** `prog-mode' is a new major mode from which programming modes
1423 **** `prog-mode-hook' can be used to enable features for programming
1424 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
1425 on-the-fly spell checking for comments and strings.
1427 *** New hook `change-major-mode-after-body-hook', run by
1428 `run-mode-hooks' just before any other mode hooks.
1430 *** Enabled globalized minor modes can be disabled in specific major modes.
1431 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
1432 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
1434 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
1436 ** File-handling changes
1438 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
1439 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
1440 both non-nil. Interactively, TRASH defaults to t, unless a prefix
1441 argument is supplied (see Trash changes, above).
1443 *** New file predicates: `file-equal-p', `file-in-directory-p'.
1445 ** Tool-bars can display separators.
1446 Tool-bar separators are handled like menu separators in menu-bar maps,
1447 i.e. via menu entries of the form `(menu-item "--")'.
1451 *** Animated images support (currently animated gifs only).
1453 **** `image-animated-p' returns non-nil if an image can be animated.
1455 **** `image-animate' animates a supplied image spec.
1457 **** `image-animate-timer' returns the timer object for an image that
1460 *** `image-extension-data' has been renamed to `image-metadata'.
1461 The old name is an obsolete alias to the new one.
1463 *** Image mode can view any image type that ImageMagick supports.
1464 This requires Emacs to be built with ImageMagick support.
1466 **** New function `imagemagick-types', defined if ImageMagick support
1467 is enabled, returns a list of image file extensions that your
1468 ImageMagick installation supports.
1470 **** New function `imagemagick-register-types' enables ImageMagick
1471 image types in Image mode and in `create-image' and other helper
1474 **** New option `imagemagick-types-inhibit' excludes certain
1475 ImageMagick image types from `imagemagick-register-types'.
1477 **** With ImageMagick support, there are extra Image mode commands to
1478 resize and rotate images: `image-transform-fit-to-height',
1479 `image-transform-fit-to-width', `image-transform-set-rotation', and
1480 `image-transform-set-scale'.
1482 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
1483 passes it to the mail user agent function. This argument specifies an
1484 action for returning to the caller after finishing with the mail. For
1485 example, this is used by Rmail to optionally delete a mail window.
1487 ** XML and HTML parsing
1488 If Emacs is compiled with libxml2 support, there are two new
1489 functions: `libxml-parse-html-region' (which parses "real world" HTML)
1490 and `libxml-parse-xml-region' (which parses XML). Both return an
1491 Emacs Lisp parse tree.
1493 ** Networking and encryption changes
1495 *** `open-network-stream' can now be used to open an encrypted stream.
1496 It now accepts an optional `:type' parameter for initiating a TLS
1497 connection, directly or via STARTTLS. To do STARTTLS, additional
1498 parameters (`:end-of-command', `:success', `:capabilities-command')
1499 must also be supplied.
1501 *** New library gnutls.el.
1502 The new function `gnutls-available-p' returns non-nil if Emacs is
1503 built with GnuTLS support. The main entry points are
1504 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
1505 these functions through `open-network-stream', because that can
1506 upgrade connections through STARTTLS opportunistically or use plain
1507 SSL, depending on your needs. For debugging, set `gnutls-log-level'
1510 *** New primitive `secure-hash' that supports many secure hash algorithms:
1511 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
1512 sha1.el has been removed. The `sha1' feature is provided by default.
1516 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
1518 ** Progress reporters can now "spin".
1519 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
1520 now be nil, or omitted. This makes a "non-numeric" reporter. Each
1521 time you call `progress-reporter-update' on that progress reporter,
1522 with a nil or omitted VALUE argument, the reporter message is
1523 displayed with a "spinning bar".
1525 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
1526 being reverted, even if the buffer has a local `revert-buffer-function'.
1528 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
1529 If delayed-warnings-list is non-nil, the command loop calls
1530 `delayed-warnings-hook' after `post-command-hook'. At present, this
1531 is only used by Emacs on some platforms to display warnings during
1532 startup, which might otherwise not be noticed. This uses the
1533 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
1535 ** rx.el has a new `group-n' construct for explicitly numbered groups.
1537 ** New function `make-composed-keymap' that constructs a new keymap
1538 from multiple input maps. You can use this to make a keymap that
1539 inherits from multiple maps, eg:
1540 (set-keymap-parent newmap (make-composed-keymap othermap parent))
1542 ** New function `string-prefix-p'.
1543 (This was actually added in Emacs 23.2 but was not advertised at the time.)
1545 ** New reader macro ## that stands for the empty symbol.
1546 This means that the empty symbol can now be read back. Also, #: by itself
1547 (when not immediately followed by a possible symbol character) stands for
1548 an empty uninterned symbol.
1550 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
1552 ** The following functions and variables are obsolete:
1554 *** `tooltip-use-echo-area' is obsolete.
1555 Rather than setting this to t, disable Tooltip mode instead.
1557 *** buffer-substring-filters is obsolete.
1558 Use `filter-buffer-substring-functions' instead.
1560 *** `byte-compile-disable-print-circle' is obsolete.
1562 *** `deferred-action-list' and `deferred-action-function' are obsolete.
1563 Use `post-command-hook' instead.
1565 *** `font-lock-maximum-size' is obsolete.
1568 * Changes in Emacs 24.1 on non-free operating systems
1570 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
1571 and also when HOME is set to C:\ by default.
1573 ** New configure.bat options
1575 *** --enable-checking builds Emacs with extra runtime checks.
1577 *** --distfiles specifies files to be included in binary distribution.
1579 *** --without-gnutls disables automatic GnuTLS detection.
1581 *** --lib for general library linkage, works with the USER_LIBS build variable.
1583 ** New make target `dist' to create binary distribution for MS Windows.
1585 ** The Lisp function `w32-default-color-map' is now obsolete.
1586 (It is only used internally in the Emacs C code.)
1588 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
1589 reappear on mouse-over. (Requires OS X 10.6 or later.)
1591 ** On Mac OS X, dragging a file into Emacs visits the file, like on
1592 other platforms, rather than inserting its contents into the buffer.
1595 ----------------------------------------------------------------------
1596 This file is part of GNU Emacs.
1598 GNU Emacs is free software: you can redistribute it and/or modify
1599 it under the terms of the GNU General Public License as published by
1600 the Free Software Foundation, either version 3 of the License, or
1601 (at your option) any later version.
1603 GNU Emacs is distributed in the hope that it will be useful,
1604 but WITHOUT ANY WARRANTY; without even the implied warranty of
1605 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1606 GNU General Public License for more details.
1608 You should have received a copy of the GNU General Public License
1609 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
1614 paragraph-separate: "[
\f]*$"