1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2012 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that the appropriate manual has already been updated.
19 --- means no change in the manuals is called for.
20 When you add a new item, please add it without either +++ or ---
21 so we will look at it and add it to the manual.
24 * Installation Changes in Emacs 24.2
26 ** New configure option '--enable-gcc-warnings', intended for developers.
27 If building with GCC, this enables compile-time checks that warn about
28 possibly-questionable C code. On a recent GNU system there should be
29 no warnings; on older and on non-GNU systems the generated warnings
30 may or may not be useful. By default, these warnings are not generated.
33 * Startup Changes in Emacs 24.2
35 ** 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 ** If your Emacs was built from a bzr checkout, the new variable
43 `emacs-bzr-version' contains information about which bzr revision was used.
46 * Editing Changes in Emacs 24.2
48 * Changes in Specialized Modes and Packages in Emacs 24.2
50 * New Modes and Packages in Emacs 24.2
52 * Incompatible Lisp Changes in Emacs 24.2
55 ** Docstrings starting with `*' no longer indicate user options.
56 Only variables defined using `defcustom' are considered user options.
57 The function `user-variable-p' is now an obsolete alias for
61 * Lisp changes in Emacs 24.2
63 * Changes in Emacs 24.2 on non-free operating systems
65 ** New configure.bat options on MS-Windows:
67 *** --without-libxml2 omits support for libxml2, even if its presence
71 * Installation Changes in Emacs 24.1
73 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
74 to configure. Note that other libraries used by Emacs, RSVG and GConf,
75 also depend on Gtk+. You can disable them with --without-rsvg and
78 ** Emacs can be compiled with GnuTLS support.
79 This happens by default if a suitably recent version of the library is
80 found at build time. To prevent this, use the configure option
81 `--without-gnutls'. See below for GnuTLS features.
83 ** Emacs can be compiled with SELinux support.
84 This happens by default if a suitably recent version of the library is
85 found at build time. To prevent this, use the configure option
86 `--without-selinux'. See below for SELinux features.
88 ** Emacs can be compiled with ImageMagick support.
89 This happens by default if a suitably recent version of the library is
90 found at build time. To prevent this, use the configure option
91 `--without-imagemagick'. See below for ImageMagick features.
92 This feature is not available for the Nextstep or MS ports.
94 ** Emacs can be compiled with libxml2 support.
95 This happens by default if a suitably recent version of the library is
96 found at build time. To prevent this, use the configure option
97 `--without-xml2'. See below for libxml2 features.
99 ** By default, the installed Info and man pages are compressed.
100 You can disable this by configuring --without-compress-info.
102 ** New configure option --with-wide-int.
103 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
104 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
107 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
108 These provide no new functionality, they just remove the need to edit
109 lib-src/Makefile by hand in order to use the associated features.
111 ** New configure option --enable-use-lisp-union-type.
112 This is only useful for Emacs developers to debug certain types of bugs.
113 This is not a new feature; only the configure flag is new.
115 ** The standalone programs digest-doc and sorted-doc are removed.
116 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
118 ** The standalone program `fakemail' is removed.
119 If you need it, feedmail.el provides a superset of the functionality.
122 * Startup Changes in Emacs 24.1
124 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
125 command line arguments, and the EMACS_UNIBYTE environment variable, no
126 longer have any effect. (They were declared obsolete in Emacs 23.)
128 ** New command line option `--no-site-lisp' removes site-lisp directories
129 from load-path. -Q now implies this. This option does not affect the
130 EMACSLOADPATH environment variable (and hence has no effect for
134 * Changes in Emacs 24.1
138 *** Many packages now use the `completion-at-point' command,
139 rather than implementing separate completion commands.
141 *** `completion-at-point' now handles tags and semantic completion.
143 *** Completion in a non-minibuffer now tries to detect the end of completion
144 and pops down the *Completions* buffer accordingly.
146 *** New option `completion-cycle-threshold' allows completion cycling.
148 *** New option `completion-category-overrides' for overriding the
149 default completion style in certain circumstances.
151 *** New completion style `substring'.
153 *** Completion of buffer names uses `substring' completion by default.
155 *** The option `widget-complete-field' has been removed.
159 *** The first time you try sending mail, Emacs asks for a mail method.
160 This is implemented by a new default for `send-mail-function', which
161 is `sendmail-query-once'. This offers to use the smtpmail package, or
162 to use the old defaults relying on external mail facilities
163 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
164 `mailclient-send-it' on Windows).
166 *** Typing C-c m in the buffer made by M-x report-emacs-bug transfers
167 the report to your desktop's preferred mail client, if there is one.
168 This uses either the "xdg-email" utility, or Mac OS's "open" command.
170 *** See Changes in Specialized Modes and Packages for SMTPmail changes
171 and Mail mode changes
173 ** Emacs server and client changes
175 *** New option `server-port' specifies the port for TCP Emacs servers.
177 *** New emacsclient argument -q/--quiet suppresses some status messages.
179 *** New emacsclient argument --frame-parameters specifies the frame
180 parameters of any newly-created graphical frame.
182 *** If emacsclient shuts down due to Emacs signaling an error,
183 its exit status is 1.
185 *** New emacsclient argument --parent-id ID.
186 This opens a client frame in parent X window ID, via XEmbed, similar
187 to the --parent-id argument to Emacs.
189 ** Internationalization changes
191 *** Emacs now supports display and editing of bidirectional text.
192 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
193 displayed in the correct visual order as expected by users of those
194 scripts. The display reordering is a "full bidirectionality" class
195 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
196 with no RTL text should look exactly the same as before.
198 **** New buffer-local variable `bidi-display-reordering'.
199 To disable display reordering in a buffer, change this to nil.
201 **** New buffer-local variable `bidi-paragraph-direction'.
202 If nil (the default), Emacs determines the base direction of each
203 paragraph from its text, as specified by the UBA. Setting the value
204 to `right-to-left' or `left-to-right' forces a base direction on each
207 Paragraphs with right-to-left base direction are displayed starting at
208 the right window edge.
210 *** Enhanced support for characters with no glyphs in available fonts,
211 or, on text terminals, characters that cannot be encoded by the
212 terminal coding system. The new option `glyphless-char-display-control'
213 specifies how to display them: as a hexadecimal code in a box, a thin
214 1-pixel space, an empty box, etc.
216 *** New input methods: farsi, farsi-translit, bulgarian-alt-phonetic.
218 *** `nobreak-char-display' now also highlights Unicode hyphen chars
221 *** New Hebrew translation of the Emacs Tutorial.
222 Type `C-u C-h t' to choose it in case your language setup doesn't
223 automatically select it.
225 ** An Emacs Lisp package manager is now included.
226 This is a convenient way to download and install additional packages,
227 from a package repository at http://elpa.gnu.org.
229 *** M-x list-packages shows a list of packages, which can be
230 selected for installation.
232 *** New command `describe-package', bound to `C-h P'.
234 *** By default, all installed packages are loaded automatically when
235 Emacs starts up. To disable this, set `package-enable-at-startup' to
236 nil. To specify the packages to load, customize `package-load-list'.
238 ** Custom theme changes
240 *** New command `M-x customize-themes', which provides a convenient
241 interface for enabling and disabling Custom themes.
243 *** New option `custom-theme-load-path' is the load path for themes.
244 Emacs no longer looks for Custom themes in `load-path'. The default
245 value of `custom-theme-load-path' says to look for themes in
246 `custom-theme-directory', followed by a subdirectory of
247 `data-directory' named "themes/", which contains a small selection of
248 built-in Custom themes.
250 *** New option `custom-safe-themes' records known-safe theme files.
251 If a theme is not in this list, Emacs queries before loading it, and
252 offers to save the theme to `custom-safe-themes' automatically. By
253 default, all themes included in Emacs are treated as safe.
255 ** Improved GTK integration
257 *** GTK scroll-bars are now placed on the right by default.
258 The function `set-scroll-bar-mode' can change this.
260 *** GTK tool bars can have just text, just images or images and text.
261 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
262 the default is taken from desktop settings.
264 *** GTK tool bars can be placed on any edge of the frame.
265 The frame-parameter tool-bar-position controls this. It takes the
266 values top, left, right or bottom. The Options => Show/Hide menu has
269 *** The default colors for selected text (the `region' face) are taken
270 from the GTK theme when Emacs is built with GTK.
272 *** Emacs uses GTK tooltips by default if built with GTK.
273 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
275 ** Graphical interface changes
277 *** On graphical displays, the mode-line no longer ends in dashes.
278 Also, the first dash (which does not indicate anything) is just
279 displayed as a space.
281 *** `menu-bar-select-buffer-function' lets you choose another operation
282 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
284 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
285 built with Xft. These fonts can be set via X resources, for example:
286 Emacs.pane.menubar.font: Courier-12
290 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
291 or if it receives a SIGINT signal in batch mode.
293 *** `kill-emacs-hook' is now also run in batch mode.
294 Third-party code which adds to `kill-emacs-hook' should check if they
295 do the right thing in batch mode.
299 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
300 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
301 of buffer at first key-press (instead they move to top/bottom of buffer)
302 when `scroll-error-top-bottom' is non-nil.
304 *** New option `scroll-error-top-bottom' (see above).
306 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
307 scroll a line instead of full screen.
309 *** New property `scroll-command' should be set on a command's symbol to
310 define it as a scroll command affected by `scroll-preserve-screen-position'.
312 *** If you customize `scroll-conservatively' to a value greater than 100,
313 Emacs will never recenter point in the window when it scrolls due to
314 cursor motion commands or commands that move point (e.f., `M-g M-g').
315 Previously, you needed to use `most-positive-fixnum' as the value of
316 `scroll-conservatively' to achieve the same effect.
318 *** "Aggressive" scrolling now honors the scroll margins.
319 If you customize `scroll-up-aggressively' or
320 `scroll-down-aggressively' and move point off the window, Emacs now
321 scrolls the window so as to avoid positioning point inside the scroll
324 ** Basic SELinux support has been added.
325 This requires Emacs to be linked with libselinux at build time.
327 *** Emacs preserves the SELinux file context when backing up.
328 Also, the function `copy-file' has an extra optional argument for
329 preserving SELinux context, and the return value of `backup-buffer'
330 now includes the SELinux context.
332 *** New functions `file-selinux-context' and `set-file-selinux-context'
333 get and set the SELinux context of a file.
337 *** `delete-by-moving-to-trash' now only affects commands that specify
338 trashing. This avoids inadvertently trashing temporary files.
340 *** Calling `delete-file' or `delete-directory' with a prefix argument
341 now forces true deletion, regardless of `delete-by-moving-to-trash'.
343 ** File- and directory-local variable changes
345 *** You can stop directory local vars from applying to subdirectories.
346 Add an element (subdirs . nil) to the alist portion of any variables
347 settings to indicate that the section should not apply to
350 *** Directory local variables can apply to some file-less buffers.
351 Affected modes include dired, vc-dir, and log-edit. For example,
352 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
353 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
354 `hack-dir-local-variables-non-file-buffer' to support this.
356 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
357 Instead, use "eval: (minor-mode 1)".
359 *** The variable `inhibit-first-line-modes-regexps' has been renamed
360 to `inhibit-local-variables-regexps'. As the name suggests, it now
361 applies to ALL file local variables, not just -*- lines. The
362 associated `inhibit-first-line-modes-suffixes' has been renamed in the
367 *** The `quit-window' command now restores the last buffer displayed
368 in the quitted window.
370 *** Resizing an Emacs frame now preserves proportional window sizes,
371 modulo restrictions like window minimum sizes and fixed-size windows.
373 *** The behavior of `display-buffer' is now customizable in detail.
375 **** New option `display-buffer-base-action' specifies a list of
376 user-determined display "actions" (functions and optional arguments
377 for choosing the displaying window).
379 This takes precedence over the default display action, which is
380 specified by `display-buffer-fallback-action'.
382 **** New option `display-buffer-alist' maps buffer name regexps to
383 display actions, taking precedence over `display-buffer-base-action'.
385 *** New option `window-combination-limit'.
386 The new option `window-combination-limit' allows to return the space
387 obtained for resizing or creating a window more reliably to the window
388 from which such space was obtained.
390 *** New option `window-combination-resize'.
391 The new option `window-combination-resize' allows to split a window that
392 otherwise cannot be split because it's too small by stealing space from
393 other windows in the same combination. Subsequent resizing or deletion
394 of the window will resize all windows in the same combination as well.
396 *** New option `frame-auto-hide-function' lets you choose between
397 iconifying or deleting a frame when burying a buffer in a dedicated
398 frame, or quitting a window showing a buffer in a frame of its own.
400 *** New commands `maximize-window' and `minimize-window'.
401 These maximize and minimize the size of a window within its frame.
403 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
404 These functions allow to navigate through the live buffers that have
405 been shown in a specific window.
407 ** Minibuffer changes
409 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
410 This is handy for minibuffer-only frames, and is also used for the feature
411 where mouse-1 pops up *Messages*"', which can now easily be changed.
413 *** Minibuffers set `truncate-lines' to nil.
414 If you want to change the value to something else, you could use
415 for example `minibuffer-setup-hook'.
417 ** `auto-mode-case-fold' is now enabled by default.
419 ** `backup-by-copying-when-mismatch' now defaults to t.
421 ** New basic faces `error', `warning', `success'.
422 These are used to highlight text indicating failure, caution or
423 successful operation.
425 ** New option `list-colors-sort' defines the color sort order
426 for `list-colors-display'.
428 ** The variable `focus-follows-mouse' now always defaults to nil.
431 * Editing Changes in Emacs 24.1
435 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
438 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
441 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
443 ** New commands `count-words-region' and `count-words'.
445 *** M-= is bound to `count-words-region', not `count-lines-region'.
446 The `count-words-region' command, when called interactively, reports
447 the number of lines, words, and characters in the region. It is a
448 superset of the old `count-lines-region', which is now an obsolete
451 ** The command `just-one-space' (M-SPC), if given a negative argument,
452 also deletes newlines around point.
456 *** New option `delete-active-region'.
457 If non-nil, [delete] and DEL delete the region if it is active and no
458 prefix argument is given. If set to `kill', those commands kill
461 *** New command `delete-forward-char', bound to [delete].
462 This is meant for interactive use, and obeys `delete-active-region'.
463 The command `delete-char' does not obey `delete-active-region'.
465 *** `delete-backward-char' is now a Lisp function.
466 Apart from obeying `delete-active-region', its behavior is unchanged.
467 However, the byte compiler now warns if it is called from Lisp; Lisp
468 callers should use delete-char with a negative argument instead.
470 *** The option `mouse-region-delete-keys' has been deleted.
472 ** Selection changes.
474 The default handling of clipboard and primary selections has been
475 changed to conform with modern X applications. In short, most
476 commands for killing and yanking text now use the clipboard, while
477 mouse commands use the primary selection.
479 In the following, we provide a list of these changes, followed by a
480 list of steps to get the old behavior back if you prefer that.
482 *** `select-active-regions' now defaults to t.
483 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
484 the kill ring. The selected text is put in the primary selection, if
485 the system possesses a separate primary selection facility (e.g. X).
487 **** `select-active-regions' also accepts a new value, `only'.
488 This means to only set the primary selection for temporarily active
489 regions (usually made by mouse-dragging or shift-selection);
490 "ordinary" active regions, such as those made with C-SPC followed by
491 point motion, do not alter the primary selection.
493 **** `mouse-drag-copy-region' now defaults to nil.
495 *** mouse-2 is now bound to `mouse-yank-primary'.
496 This pastes from the primary selection, ignoring the kill-ring.
497 Previously, mouse-2 was bound to `mouse-yank-at-click'.
499 *** `x-select-enable-clipboard' now defaults to t on all platforms.
501 *** `x-select-enable-primary' now defaults to nil.
502 Thus, commands that kill text or copy it to the kill-ring (such as
503 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
505 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
506 exactly equivalent to M-w, C-w, and C-y respectively.
508 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
509 non-nil by default, as Windows does not support the primary selection
510 between applications.
512 *** To return to the previous behavior, do the following:
514 **** Change `select-active-regions' to nil.
515 **** Change `mouse-drag-copy-region' to t.
516 **** Change `x-select-enable-primary' to t (on X only).
517 **** Change `x-select-enable-clipboard' to nil.
518 **** Bind `mouse-yank-at-click' to mouse-2.
520 *** Support for X cut buffers has been removed.
522 *** X clipboard managers are now supported.
523 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
525 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
526 in the current rectangle. With a prefix argument, this prompts for a
527 number to count from and for a format string.
529 ** `redisplay-dont-pause' now defaults to t.
530 This makes Emacs feel more responsive to editing commands that arrive
531 at high rate, e.g. if you lean on some key, because stopping redisplay
532 in the middle (when this variable is nil) forces more expensive
533 updates later on, and Emacs appears to be unable to keep up.
535 ** The behavior of <TAB> for active regions in Text mode has changed.
536 In Text and related modes, typing <TAB> (`indent-for-tab-command')
537 when the region is active causes Emacs to indent all the lines in the
538 region, aligning them with the line previous to the first line in the
539 region (or with the left margin if there is no previous line).
541 ** When `occur' is called with a prefix argument, matching strings are
542 collected into the `*Occur*' buffer without line numbers. If there
543 are parenthesized subexpressions in the specified regexp, `occur'
544 reads replacement text that may contain \\& and \\N whose convention
545 follows `replace-match'.
548 * Changes in Specialized Modes and Packages in Emacs 24.1
550 ** Archive Mode has basic support for browsing and updating 7z archives.
554 *** BibTeX mode now supports biblatex.
555 Use the variable `bibtex-dialect' to select different BibTeX dialects.
556 `bibtex-entry-field-alist' is now an obsolete alias for
557 `bibtex-BibTeX-entry-alist'.
559 *** New command `bibtex-search-entries', bound to C-c C-a.
561 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
563 *** New variable `bibtex-search-entry-globally'.
567 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
569 *** The default browser used by the package is now the "xdg-open" program,
570 on platforms that support it. This calls your desktop's preferred browser.
572 ** Calendar, Diary, and Appt
574 *** Diary entries can contain non-printing "comments".
575 See the variable `diary-comment-start'.
577 *** Appointments can specify their individual warning times.
578 See the variable `appt-warning-time-regexp'.
580 *** The function specified by `appt-disp-window-function' may be passed
581 lists of arguments if multiple appointments are due at similar times.
582 If you are using a custom function for this, you should update it.
584 *** New function `diary-hebrew-birthday'.
586 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
587 may no longer be nil, but must all be strings.
589 *** The obsolete (since Emacs 22.1) method of enabling the appt
590 package by adding `appt-make-list' to `diary-hook' has been removed.
591 Use `appt-activate' instead.
593 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
594 appt-issue-message (use the function appt-activate)
595 appt-visible/appt-msg-window (use the variable appt-display-format)
597 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
598 view-diary-entries, list-diary-entries, show-all-diary-entries
602 *** New feature to "guess" the style in an existing buffer.
603 The main entry point is M-x c-guess.
605 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
607 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
608 Thus C-M-a will, by default, go to the beginning of the immediate function,
611 *** "Macros with semicolons" can be registered for correct indentation.
612 Where such a macro ends a line (no semicolon) the next statement is no longer
613 parsed as a statement continuation.
615 ** Comint and modes derived from it use the standard completion code.
619 *** Compilation mode can be used without Font Lock mode.
620 `compilation-parse-errors-function' is now obsolete.
622 *** New variable `compilation-filter-start', which is bound while
623 `compilation-filter-hook' runs. It records the start position of the
624 text inserted by `compilation-filter'.
626 *** `compilation-error-screen-columns' and `compilation-first-column'
627 are obeyed in the editing buffer. So programming language modes can
628 set them, whereas previously only the value in the *Compilation*
633 *** Customize buffers now contain a search field.
634 The search is performed using `customize-apropos'.
635 To turn off the search field, set `custom-search-field' to nil.
637 *** Custom options now start out hidden if at their default values.
638 Use the arrow to the left of the option name to toggle visibility.
640 *** custom-buffer-sort-alphabetically now defaults to t.
642 *** The color widget now has a "Choose" button, which allows you to
643 choose a color via `list-colors-display'.
647 *** It is now possible to access buses other than the default system
650 *** The `dbus-register-method' and `dbus-register-property' functions
651 optionally do not register names.
653 *** The new function `dbus-register-service' registers a known service
654 name on a D-Bus without also registering a property or a method.
658 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
659 if called with a prefix argument, read a file name from the minibuffer
660 instead of using the current buffer.
662 *** The "dired local variables" feature of Dired-x is obsolete.
663 The standard directory local variables feature replaces it.
667 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
668 controlling attempts to autojoin a channel.
670 *** New variable `erc-coding-system-precedence': If we use `undecided'
671 as the server coding system, this variable will then be consulted.
672 The default is to decode strings that can be decoded as utf-8 as
673 utf-8, and do the normal `undecided' decoding for the rest.
677 *** The default value of `eshell-directory-name' has changed
678 to be an "eshell" directory in `user-emacs-directory'.
679 The old "~/.eshell/" directory is still used if it exists, though.
683 *** The M-x gdb command now uses the GDB Machine Interface protocol.
684 It now supports multithread non-stop debugging and simultaneous
685 debugging of several threads.
689 *** RET (`image-toggle-animation') toggles animation, if applicable.
690 Animation plays once, unless the option `image-animate-loop' is non-nil.
694 *** New command M-x info-display-manual displays a named Info manual.
695 If that manual is already visited in some Info buffer, it displays
696 that buffer. (This is handy if you have many manuals in many *info*
697 buffers, and don't remember the name of the buffer visiting the manual
698 you want to consult.) Otherwise, it loads and displays the manual.
700 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
701 This is for compatibility with the stand-alone Info reader program,
702 and also because `Info-edit' is a rarely used command that is disabled
705 ** Mail mode changes (not Message mode)
707 *** New command M-x mail-add-attachment for adding MIME attachments
709 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
710 (Its name is misleading, since it has nothing to do with MIME
711 attachments.) The old name is now an obsolete alias to the new name.
713 ** MH-E has been upgraded to MH-E version 8.3.1.
714 See MH-E-NEWS for details.
716 ** Modula-2 mode provides auto-indentation.
718 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
720 ** nXML mode no longer binds C-RET to `nxml-complete'.
721 Completion is now performed via `completion-at-point', bound to C-M-i
722 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
723 default), this performs tag completion.
725 ** Prolog mode has been completely revamped, with lots of additional
726 functionality such as more intelligent indentation, electricity,
727 support for more variants, including Mercury, and a lot more.
731 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
732 in the Rmail incoming message.
734 *** The variable `rmail-message-filter' no longer has any effect.
735 This change was made in Emacs 23.1 but was not advertised at the time.
736 Try using `rmail-show-message-hook' instead.
740 *** M-x shell prompts for the shell path name if the default directory
741 is a remote file name and neither the environment variable $ESHELL nor
742 the variable `explicit-shell-file-name' is set.
744 *** TAB is now bound to the standard `completion-at-point' command,
745 which now implements the pcomplete rules for shell command completion.
749 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
750 if the mail server supports them. This uses either built-in GnuTLS
751 support, or the starttls.el library. Customize `smtpmail-stream-type'
754 *** The variable `smtpmail-auth-credentials' has been removed.
755 By default, the information is now stored in the file ~/.authinfo.
756 This was the default value of smtpmail-auth-credentials. If you had
757 customized smtpmail-auth-credentials to a list of user names and
758 passwords, those settings are not used. During your first connection
759 to the smtp server, Emacs will prompt for the user name and password,
760 and offer to save them to ~/.authinfo. Or you can manually copy the
761 credentials to ~/.authinfo. For example, if you had
763 (setq smtpmail-auth-credentials
764 '(("mail.example.org" 25 "jim" "s!cret")))
766 then the equivalent line in ~/.authinfo would be
768 machine mail.example.org port 25 login jim password s!cret
770 See the auth-source manual for more information, e.g. on encrypting
771 the credentials file.
773 *** The variable `smtpmail-starttls-credentials' has been removed.
774 If you had that set, you need to put
776 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
778 in your ~/.authinfo file instead.
782 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
783 and `sql-oracle-scan-on'.
785 *** New options controlling prompting for login parameters.
786 Each supported product has a custom variable `sql-*-login-params',
787 which is a list of the parameters to be prompted for before a
788 connection is established.
790 *** The command `sql-product-interactive' now takes a prefix argument,
791 which causes it to prompt for an SQL product.
793 *** Product-specific SQL interactive commands now take prefix arguments.
794 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
795 given a prefix argument, prompt for a name for the SQL interactive
796 buffer. This reduces the need for calling `sql-rename-buffer'.
798 *** SQL interactive modes suppress command continuation prompts, and
799 replace tabs with spaces. The first change impacts multiple line SQL
800 statements entered with C-j between each line, statements yanked into
801 the buffer and statements sent with `sql-send-*' functions. The
802 second prevents the MySQL and Postgres interpreters from listing
803 object name completions when sent text via `sql-send-*' functions.
805 *** New command `sql-connect' starts a predefined SQLi session,
806 using the login parameters from `sql-connection-alist'.
808 *** New "Save Connection" menu item in SQLi buffers.
809 This gathers the login params specified for the SQLi session, if it
810 was not started by a connection, and saves them as a new connection.
812 *** New commands for listing database objects and details:
813 sql-list-all and sql-list-table.
815 *** An API for manipulating SQL product definitions has been added.
819 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
823 *** New inline access method "ksu" (kerberized su).
825 *** The following access methods are discontinued: "ssh1_old",
826 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
828 *** The user option `remote-file-name-inhibit-cache' controls whether
829 remote file attributes are cached for better performance.
831 *** The option `ange-ftp-binary-file-name-regexp' has changed its
834 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
835 for remote machines which support SELinux.
837 ** New function `url-queue-retrieve', which behaves like url-retrieve,
838 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
839 the degree of parallelism.
841 ** VC and related modes
843 *** Support for pulling on distributed version control systems.
844 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
845 supported (currently with Bzr, Git, and Mercurial), to update the
846 current branch and working tree. A prefix argument means to prompt
847 the user for specifics, e.g. a pull location.
849 *** `vc-update' is now an alias for `vc-pull'.
851 *** Support for merging on distributed version control systems.
852 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
853 is supported (currently with Bzr, Git, and Mercurial), to merge
854 changes from another branch into the current one. It prompts for
855 specifics, e.g. a merge source.
857 *** New option `vc-revert-show-diff' controls whether `vc-revert'
858 shows a diff while querying the user. It defaults to t.
860 *** Log entries in some Log View buffers can be toggled to display a
861 longer description by typing RET (log-view-toggle-entry-display).
862 This is currently supported for Bzr, Git, and Mercurial (to support
863 another backend, define a `log-view-expanded-log-entry-function').
864 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
865 use this to display the full log entry for the revision at point.
867 *** New command `vc-ediff' allows visual comparison of two revisions
868 of a file similar to `vc-diff', but using ediff backend.
870 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
871 this was not advertised at the time.
873 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
874 Since Emacs 23, it has done the same thing as `toggle-read-only', but
875 this was not advertised at the time.
881 *** erc-hecomplete.el (use erc-pcomplete.el instead)
883 *** partial-completion-mode (complete.el) is obsolete.
884 You can get a comparable behavior with:
885 (setq completion-styles '(partial-completion initials))
886 (setq completion-pcm-complete-word-inserts-delimiters t)
888 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
890 *** pgg is obsolete (use EasyPG instead).
892 *** sregex.el is obsolete, since rx.el is a strict superset.
894 *** s-region.el and pc-select.el are obsolete.
895 They are superseded by shift-select-mode, enabled by default since 23.1.
897 *** vc-mcvs.el is obsolete (for lack of a maintainer).
901 *** The Landmark game is now invoked with `landmark', not `lm'.
902 Its functions and variables have been similarly renamed.
904 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
905 (This interfered with cua-mode.)
907 *** f90.el has some support for Fortran 2008 syntax.
909 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
911 *** New command `nato-region' converts text to NATO phonetic alphabet.
914 * New Modes and Packages in Emacs 24.1
916 ** Occur Edit mode applies edits made in *Occur* buffers to the
917 original buffers. It is bound to "e" in Occur mode.
919 ** New global minor mode electric-pair-mode.
920 When enabled, typing an open parenthesis automatically inserts the
921 matching closing one.
923 ** New global minor mode electric-indent-mode.
924 When enabled, typing certain characters triggers reindentation.
925 Major modes wishing to use this can set electric-indent-chars or
926 electric-indent-functions.
928 ** New global minor mode electric-layout-mode.
929 When enabled, typing certain characters automatically inserts newlines.
930 Major modes wishing to use this can set electric-layout-rules.
932 ** tabulated-list.el provides a generic major mode for tabulated data,
933 from which other modes can be derived.
935 ** pcase.el provides the ML-style pattern matching macro `pcase'.
937 ** secrets.el is an implementation of the Secret Service API, an
938 interface to password managers like GNOME Keyring or KDE Wallet. The
939 Secret Service API requires D-Bus for communication. The command
940 `secrets-show-secrets' offers a buffer with a visualization of the
943 ** notifications.el provides an implementation of the Desktop
944 Notifications API. It requires D-Bus for communication.
946 ** soap-client.el supports access to SOAP web services from Emacs.
947 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
949 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
951 ** New emacs-lock.el package.
952 The previous version has been moved to obsolete/old-emacs-lock.el.
953 Now, there is a proper minor mode `emacs-lock-mode'. Protection
954 against exiting Emacs and killing the buffer can be set separately.
955 The mechanism for automatically turning off protection for buffers
956 with dead inferior processes has been generalized.
959 * Incompatible Lisp Changes in Emacs 24.1
961 ** Passing a nil argument to a minor mode function call now ENABLES
962 the minor mode unconditionally. This is so that you can write e.g.
964 (add-hook 'text-mode-hook 'foo-mode)
966 to enable foo-mode in Text mode buffers, removing the need for
967 `turn-on-foo-mode' style functions. This affects all mode commands
968 defined by `define-minor-mode'. If called interactively, the mode
969 command still toggles the minor mode.
971 ** The return value of `backup-buffer' has changed.
972 It is now a list of three elements, where the second element is a list
973 describing the original file's SELinux context. If Emacs or the
974 system lacks SELinux support, the context list is (nil nil nil nil).
975 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
977 ** `char-direction-table' and the `char-direction' function were deleted.
978 They were buggy and inferior to the new support of bidirectional
979 editing introduced in Emacs 24. If you need the bidirectional
980 properties of a character, use `get-char-code-property' with the last
981 argument `bidi-class'.
983 ** `copy-directory' now copies the source directory as a subdirectory
984 of the target directory, if the latter is an existing directory. The
985 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
986 the contents directly into a pre-existing target directory.
988 ** For mouse click input events in the text area, the Y pixel
989 coordinate in the POSITION list now counts from the top of the text
990 area, excluding any header line. Previously, it counted from the top
993 ** Support for "old-style" backquotes, obsolete for 10+ years, has
994 been further reduced. Now a backquote not followed by a space is
995 always treated as a "new-style" backquote. Please remove all
996 "old-style" backquotes from your code. If your code uses backquotes
997 as documented in the Elisp manual, and compiles without warning, then
998 you have nothing to do in this regard. Code not following the
999 appropriate conventions may fail to compile.
1001 The most common cause of trouble seems to be an old-style backquote
1002 followed by a newline. Another cause of trouble is vector notation
1003 for key sequence notation: instead of [(control ,)] and [(control ')],
1004 you should write [(control ?,)] and [(control ?')], which will work in
1007 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
1008 was not advertised at the time. The function `custom-initialize-delay'
1009 replaced all known uses.
1011 ** `view-buffer' now treats special mode-class in the same way that
1012 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
1013 major mode is special).
1015 ** Menu and tool bar changes
1017 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
1018 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
1019 With these alist entries omitted, `make-frame' checks the value of the
1020 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
1021 a menu-bar or tool-bar, respectively. If the alist entries are added,
1022 they override the value of `menu-bar-mode'/`tool-bar-mode'.
1024 *** The menu bar bindings's caches are not used any more.
1025 Use (where-is-internal <def> nil t) instead.
1027 ** Regions created by mouse dragging are now normal active regions,
1028 similar to those created by shift-selection (see Selection changes
1029 above). In previous Emacs versions, these regions were delineated by
1030 `mouse-drag-overlay'; that variable has been removed.
1032 ** The fourth argument of `filter-buffer-substring' has been removed.
1033 If you want to remove text properties from the final result, simply
1034 pass the result through substring-no-properties.
1036 ** cl.el no longer provides `cl-19'.
1038 ** The following obsolete functions and aliases have been removed
1039 (the appropriate new function is given in parentheses; "not needed"
1040 means you can just remove all calls to the function in question):
1042 *** `comint-kill-output' (`comint-delete-output')
1043 *** `decompose-composite-char' (`char-to-string')
1044 *** `outline-visible' (`outline-invisible-p')
1045 *** `internal-find-face' (`facep')
1046 *** `internal-get-face' (`facep and check-face')
1047 *** `frame-update-faces' (not needed)
1048 *** `frame-update-face-colors' (`frame-set-background-mode')
1049 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
1050 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
1051 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
1052 *** `x-make-font-bold-italic' (`make-face-bold-italic')
1053 *** `x-make-font-unbold' (`make-face-unbold')
1054 *** `x-make-font-unitalic' (`make-face-unitalic')
1055 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
1056 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
1057 *** `iswitchb-default-keybindings' (`iswitchb-mode')
1058 *** `char-bytes' (== 1)
1059 *** `isearch-return-char' (`isearch-printing-char')
1060 *** `make-local-hook' (not needed)
1061 *** `set-screen-height' (`set-frame-height')
1062 *** `set-screen-width' (`set-frame-width')
1064 ** The following obsolete variables and varaliases have been removed
1065 (the appropriate new variable is given in parentheses):
1067 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
1068 *** `vc-header-alist' (`vc-BACKEND-header')
1069 *** `directory-sep-char' (== ?/)
1070 *** `font-lock-defaults-alist' (`font-lock-defaults')
1071 *** `e' (`float-e').
1073 ** The following obsolete files were removed:
1074 sc.el, x-menu.el, rnews.el, rnewspost.el
1076 ** The format of the finder-inf.el file has changed, since the Finder
1077 mechanism is now based on the package system. The variable
1078 `finder-package-info' is replaced by `package--builtins' and
1079 `finder-keywords-hash'.
1081 ** When generating autoloads, `update-directory-autoloads' no longer
1082 assumes every inspected file is in your `load-path'. It instead
1083 generates relative names according to the current `load-path'.
1086 * Lisp changes in Emacs 24.1
1088 ** Code can now use lexical scoping by default instead of dynamic scoping.
1089 The `lexical-binding' variable enables lexical scoping for local
1090 variables. It is typically set via a file-local variable in the first
1091 line of the file, in which case it applies to all the code in that
1094 *** `eval' takes a new optional argument `lexical' to choose the new lexical
1095 binding instead of the old dynamic binding mode.
1097 *** Lexically scoped interpreted functions are represented with a new form
1098 of function value which looks like (closure ENV ARGS &rest BODY).
1100 *** New macro `letrec' to define recursive local functions.
1102 *** `defvar' and `defconst' now mark the variable as special (dynamic).
1103 So do `defcustom' and other forms that call `defvar' as a subroutine.
1105 *** New function `special-variable-p' to check whether a variable is
1106 declared as dynamically bound.
1108 ** An Emacs Lisp testing tool is now included.
1109 Emacs Lisp developers can use this tool to write automated tests for
1110 their code. See the ERT info manual for details.
1112 ** Changes for bidirectional display and editing
1114 *** New function `current-bidi-paragraph-direction'.
1115 This returns the base direction of the paragraph at point.
1117 *** New function `bidi-string-mark-left-to-right'.
1118 Given a string containing characters from right-to-left scripts, this
1119 function returns another string which can be safely inserted into a
1120 buffer, such that any following text will be always displayed to the
1121 right of that string. (This works by appending an invisible Unicode
1122 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
1124 This is useful when the buffer has overall left-to-right paragraph
1125 direction and you need to insert a string whose contents are not known
1126 in advance, without disrupting the layout of the line.
1130 *** Window tree functions are accessible in Elisp.
1131 Functions are provided to return the parent, siblings or child windows
1132 of any window including internal windows (windows not associated with a
1133 buffer) in the window tree.
1135 **** New function `window-valid-p' gives non-nil for live and internal
1138 **** Window manipulation can deal with internal windows.
1139 Many window handling functions like `split-window', `delete-window', or
1140 `delete-other-windows' as well as the window resizing functions can now
1141 act on any window including internal ones.
1143 *** window-total-height/-width vs window-body-height/-width.
1144 The function `window-height' has been renamed to `window-total-height'
1145 and `window-width' has been renamed to `window-body-width'. The old
1146 names are provided as aliases. Two new functions `window-total-width'
1147 and `window-body-height' are provided.
1149 *** Window parameters specific to window handling functions.
1150 For each window you can specify a parameter to override the default
1151 behavior of a number of functions like `split-window', `delete-window'
1152 and `delete-other-windows'. The variable `ignore-window-parameters'
1153 allows to ignore processing such parameters.
1155 *** New semantics of third argument of `split-window'.
1156 The third argument of `split-window' has been renamed to SIDE and can be
1157 set to any of the values 'below, 'right, 'above, or 'left to make the
1158 new window appear on the corresponding side of the window that shall be
1159 split. Any other value of SIDE will cause `split-window' to split the
1160 window into two side-by-side windows as before.
1162 *** Window resizing functions.
1163 A new standard function for resizing windows called `window-resize' has
1164 been introduced. This and all other functions for resizing windows no
1165 longer delete any windows when they become too small.
1167 *** Deleting the selected window now selects the most recently selected
1168 live window on that frame instead.
1170 *** `adjust-window-trailing-edge' adjustments.
1171 `adjust-window-trailing-edge' can now deal with fixed-size windows and
1172 is able to resize other windows if a window adjacent to the trailing
1173 edge cannot be shrunk any more. This makes its behavior more similar to
1174 that of Emacs 21 without compromising, however, its inability to delete
1175 windows which was introduced in Emacs 22.
1177 *** Window-local buffer lists.
1178 Windows now have local buffer lists. This means that removing a buffer
1179 from display in a window will preferably show the buffer previously
1180 shown in that window with its previous window-start and window-point
1181 positions. This also means that the same buffer may be automatically
1182 shown twice even if it already appears in another window.
1184 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
1185 which if non-nil requires the buffer to be displayed in the currently
1186 selected window, signaling an error otherwise. If nil, another window
1187 can be used, e.g. if the selected one is strongly dedicated.
1189 *** `split-window-vertically' and `split-window-horizontally' renamed
1190 to `split-window-below' and `split-window-right' respectively.
1191 The old names are kept as aliases.
1195 **** The second arg to `display-buffer' and `pop-to-buffer' is now
1196 named ACTION, and takes a display action of the same form as
1197 `display-buffer-base-action' (see Changes, above). A non-nil,
1198 non-list value is treated specially, as the old meaning.
1200 **** New variable `display-buffer-overriding-action'.
1202 **** The procedure of `display-buffer' etc. to choose a window is
1203 determined by combining `display-buffer-overriding-action',
1204 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
1205 and `display-buffer-fallback-action'. The second and fourth of these
1206 are user-customizable variables.
1208 See the docstring of `display-buffer' for details.
1210 *** New functions `window-state-get' and `window-state-put'.
1211 These functions allow to save and restore the state of an arbitrary
1212 frame or window as an Elisp object.
1216 *** New variable `completion-extra-properties' used to specify extra
1217 properties of the current completion:
1218 - :annotate-function, same as the old completion-annotate-function.
1219 - :exit-function, function to call after completion took place.
1221 *** Functions on `completion-at-point-functions' can return any of the
1222 properties valid for `completion-extra-properties'.
1224 *** `completion-annotate-function' is obsolete.
1226 *** New `metadata' method for completion tables. The metadata thus returned
1227 can specify various details of the data returned by `all-completions':
1228 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
1229 used to select a style in completion-category-overrides.
1230 - `annotation-function' to add annotations in *Completions*.
1231 - `display-sort-function' to specify how to sort entries in *Completions*.
1232 - `cycle-sort-function' to specify how to sort entries when cycling.
1234 *** `minibuffer-local-filename-must-match-map' is not used any more.
1235 Instead, the bindings in `minibuffer-local-filename-completion-map'
1236 are combined with `minibuffer-local-must-match-map'.
1238 *** New variable `completing-read-function' allows overriding the
1239 behavior of `completing-read'.
1241 ** `glyphless-char-display' can now distinguish between graphical and
1242 text terminal display, via a char-table entry that is a cons cell.
1244 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
1245 Instead, the offending function is removed.
1249 *** New function `run-hook-wrapped' for running an abnormal hook by
1250 passing the hook functions as arguments to a "wrapping" function.
1251 Like `run-hook-with-args-until-success', it stops at the first
1252 non-nil return value.
1254 *** New macro `with-wrapper-hook' for running an abnormal hook as a
1255 set of "wrapping" filters, similar to around advice.
1256 (A version of this macro was actually added in Emacs 23.2 but was not
1257 advertised at the time.)
1261 *** New macro `condition-case-unless-debug' (this was actually added in
1262 Emacs 23.1 as condition-case-no-debug, but not advertised)
1264 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
1266 *** Variable `stack-trace-on-error' removed.
1268 *** The debugger can now "continue" from an error, which means it will
1269 jump to the error handler as if the debugger had not been invoked
1270 instead of jumping all the way to the top-level.
1272 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
1273 This can be useful when `inhibit-quit' is set.
1275 ** The new function `server-eval-at' allows evaluation of Lisp forms on
1276 named Emacs server instances.
1278 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
1279 to redirect STDOUT to a file.
1281 ** The function `format-time-string' now supports the %N directive,
1282 for higher-resolution time stamps.
1284 ** New input reading functions
1286 *** New function `read-char-choice' reads a restricted set of
1287 characters, discarding any inputs not inside the set.
1289 *** The command `read-color' now requires a match for a color name
1290 or RGB triplet, instead of signaling an error if the user provides
1293 **** `facemenu-read-color' is now an alias for `read-color'.
1295 ** `image-library-alist' is renamed to `dynamic-library-alist'.
1296 The variable is now used to load all kind of supported dynamic libraries,
1297 not just image libraries. The previous name is still available as an
1300 ** Syntax parsing changes
1302 *** New variable `syntax-propertize-function'.
1303 This replaces `font-lock-syntactic-keywords' which is now obsolete.
1304 This allows syntax-table properties to be set independently from font-lock:
1305 just call syntax-propertize to make sure the text is propertized.
1306 Together with this new variable come a new hook
1307 syntax-propertize-extend-region-functions, as well as two helper functions:
1308 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
1309 as-is; and syntax-propertize-rules which provides a new way to specify
1312 *** Syntax tables support a new "comment style c" additionally to style b.
1314 ** New hook `post-self-insert-hook', run after `self-insert-command'.
1316 ** frame-local variables cannot be let-bound any more.
1318 ** Major and minor mode changes
1320 *** `set-auto-mode' now respects mode: local variables at the end of files,
1321 as well as those in the -*- line.
1323 *** `prog-mode' is a new major mode from which programming modes
1326 **** `prog-mode-hook' can be used to enable features for programming
1327 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
1328 on-the-fly spell checking for comments and strings.
1330 *** New hook `change-major-mode-after-body-hook', run by
1331 `run-mode-hooks' just before any other mode hooks.
1333 *** Enabled globalized minor modes can be disabled in specific major modes.
1334 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
1335 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
1337 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
1339 ** File-handling changes
1341 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
1342 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
1343 both non-nil. Interactively, TRASH defaults to t, unless a prefix
1344 argument is supplied (see Trash changes, above).
1346 *** New file predicates: `file-equal-p', `file-in-directory-p'.
1348 ** Tool-bars can display separators.
1349 Tool-bar separators are handled like menu separators in menu-bar maps,
1350 i.e. via menu entries of the form `(menu-item "--")'.
1354 *** Animated images support (currently animated gifs only).
1356 **** `image-animated-p' returns non-nil if an image can be animated.
1358 **** `image-animate' animates a supplied image spec.
1360 **** `image-animate-timer' returns the timer object for an image that
1363 *** `image-extension-data' has been renamed to `image-metadata'.
1364 The old name is an obsolete alias to the new one.
1366 *** Image mode can view any image type that ImageMagick supports.
1367 This requires Emacs to be built with ImageMagick support.
1369 **** New function `imagemagick-types', defined if ImageMagick support
1370 is enabled, returns a list of image file extensions that your
1371 ImageMagick installation supports.
1373 **** New function `imagemagick-register-types' enables ImageMagick
1374 image types in Image mode and in `create-image' and other helper
1377 **** New option `imagemagick-types-inhibit' excludes certain
1378 ImageMagick image types from `imagemagick-register-types'.
1380 **** With ImageMagick support, there are extra Image mode commands to
1381 resize and rotate images: `image-transform-fit-to-height',
1382 `image-transform-fit-to-width', `image-transform-set-rotation', and
1383 `image-transform-set-scale'.
1385 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
1386 passes it to the mail user agent function. This argument specifies an
1387 action for returning to the caller after finishing with the mail. For
1388 example, this is used by Rmail to optionally delete a mail window.
1390 ** XML and HTML parsing
1391 If Emacs is compiled with libxml2 support, there are two new
1392 functions: `libxml-parse-html-region' (which parses "real world" HTML)
1393 and `libxml-parse-xml-region' (which parses XML). Both return an
1394 Emacs Lisp parse tree.
1396 ** Networking and encryption changes
1398 *** `open-network-stream' can now be used to open an encrypted stream.
1399 It now accepts an optional `:type' parameter for initiating a TLS
1400 connection, directly or via STARTTLS. To do STARTTLS, additional
1401 parameters (`:end-of-command', `:success', `:capabilities-command')
1402 must also be supplied.
1404 *** New library gnutls.el.
1405 The new function `gnutls-available-p' returns non-nil if Emacs is
1406 built with GnuTLS support. The main entry points are
1407 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
1408 these functions through `open-network-stream', because that can
1409 upgrade connections through STARTTLS opportunistically or use plain
1410 SSL, depending on your needs. For debugging, set `gnutls-log-level'
1413 *** New primitive `secure-hash' that supports many secure hash algorithms:
1414 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
1415 sha1.el has been removed. The `sha1' feature is provided by default.
1419 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
1421 ** Progress reporters can now "spin".
1422 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
1423 now be nil, or omitted. This makes a "non-numeric" reporter. Each
1424 time you call `progress-reporter-update' on that progress reporter,
1425 with a nil or omitted VALUE argument, the reporter message is
1426 displayed with a "spinning bar".
1428 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
1429 being reverted, even if the buffer has a local `revert-buffer-function'.
1431 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
1432 If delayed-warnings-list is non-nil, the command loop calls
1433 `delayed-warnings-hook' after `post-command-hook'. At present, this
1434 is only used by Emacs on some platforms to display warnings during
1435 startup, which might otherwise not be noticed. This uses the
1436 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
1438 ** rx.el has a new `group-n' construct for explicitly numbered groups.
1440 ** New function `make-composed-keymap' that constructs a new keymap
1441 from multiple input maps. You can use this to make a keymap that
1442 inherits from multiple maps, eg:
1443 (set-keymap-parent newmap (make-composed-keymap othermap parent))
1445 ** New function `string-prefix-p'.
1446 (This was actually added in Emacs 23.2 but was not advertised at the time.)
1448 ** New reader macro ## that stands for the empty symbol.
1449 This means that the empty symbol can now be read back. Also, #: by itself
1450 (when not immediately followed by a possible symbol character) stands for
1451 an empty uninterned symbol.
1453 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
1455 ** The following functions and variables are obsolete:
1457 *** `tooltip-use-echo-area' is obsolete.
1458 Rather than setting this to t, disable Tooltip mode instead.
1460 *** buffer-substring-filters is obsolete.
1461 Use `filter-buffer-substring-functions' instead.
1463 *** `byte-compile-disable-print-circle' is obsolete.
1465 *** `deferred-action-list' and `deferred-action-function' are obsolete.
1466 Use `post-command-hook' instead.
1468 *** `font-lock-maximum-size' is obsolete.
1471 * Changes in Emacs 24.1 on non-free operating systems
1473 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
1474 and also when HOME is set to C:\ by default.
1476 ** New configure.bat options
1478 *** --enable-checking builds Emacs with extra runtime checks.
1480 *** --distfiles specifies files to be included in binary distribution.
1482 *** --without-gnutls disables automatic GnuTLS detection.
1484 *** --lib for general library linkage, works with the USER_LIBS build variable.
1486 ** New make target `dist' to create binary distribution for MS Windows.
1488 ** The Lisp function `w32-default-color-map' is now obsolete.
1489 (It is only used internally in the Emacs C code.)
1491 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
1492 reappear on mouse-over. (Requires OS X 10.6 or later.)
1494 ** On Mac OS X, dragging a file into Emacs visits the file, like on
1495 other platforms, rather than inserting its contents into the buffer.
1498 ----------------------------------------------------------------------
1499 This file is part of GNU Emacs.
1501 GNU Emacs is free software: you can redistribute it and/or modify
1502 it under the terms of the GNU General Public License as published by
1503 the Free Software Foundation, either version 3 of the License, or
1504 (at your option) any later version.
1506 GNU Emacs is distributed in the hope that it will be useful,
1507 but WITHOUT ANY WARRANTY; without even the implied warranty of
1508 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1509 GNU General Public License for more details.
1511 You should have received a copy of the GNU General Public License
1512 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
1517 paragraph-separate: "[
\f]*$"