1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to emacs-pretest-bug@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 23.
11 See files NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18, and NEWS.1-17
12 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.
19 +++ indicates that the appropriate manual has already been updated.
20 --- means no change in the manuals is called for.
21 When you add a new item, please add it without either +++ or ---
22 so we will look at it and add it to the manual.
25 * Installation Changes in Emacs 23.2
27 ** New configure options for Emacs developers
28 These are not new features; only the configure flags are new.
30 *** --enable-profiling builds Emacs with profiling enabled.
31 This might not work on all platforms.
33 *** --enable-checking[=OPTIONS] builds emacs with extra runtime checks.
35 * Changes in Emacs 23.2
37 ** Unibyte sessions are declared obsolete.
38 I.e. the use of the environment variable EMACS_UNIBYTE, or command line
39 arguments --unibyte, --multibyte, --no-multibyte, and --no-unibyte
40 is deprecated. Similarly for custom-izing enable-multibyte-characters, or
41 setting default-enable-multibyte-characters.
43 ** The default value of `trash-directory' has changed to nil, which
44 means that `move-file-to-trash' trashes files according to
45 freedesktop.org specifications, the same method used by the Gnome,
46 KDE, and XFCE desktops. (This change has no effect on Windows, which
47 uses `system-move-file-to-trash' for trashing.)
50 ** Emacs frames can be maximized.
51 The command line arguments -mm/--maximized and the value maximized to the
52 frame parameter fullscreen makes the Emacs frame maximized.
55 ** New frame parameter sticky makes Emacs frames sticky in virtual desktops.
57 ** The pointer now becomes invisible when typing.
58 Customize make-pointer-invisible to turn it off.
61 ** On MS-Windows, `display-time' now displays the system load average
62 as well as the time, as it does on GNU and Unix.
64 ** Killing a buffer with a running process now asks a confirmation.
65 You can remove this query in two ways: either removing
66 `process-kill-buffer-query-function' from `kill-buffer-query-functions' or
67 setting the appropriate process flag with `set-process-query-on-exit-flag'.
70 ** If `select-active-regions' is t, any active region automatically
71 becomes the primary selection (for interaction with other window
72 applications). If you enable this, you might want to bind
73 `mouse-yank-primary' to Mouse-2.
75 ** The variable `load-in-progress' won't get corrupted by binding it
76 with `let'. In certain situations, loading an Emacs Lisp file from
77 source while in the midst of loading another file (e.g., with
78 `require' or `autoload') could cause the value of `load-in-progress'
79 to be corrupted once the outer load completed. Most code doesn't care
80 about this, but some (like c-mode) may check it.
82 ** When `save-interprogram-paste-before-kill' is non-nil, emacs will not
83 clobber the the interprogram paste when something is killed in it by
84 saving the former in the `kill-ring' before the latter.
86 ** When `kill-do-not-save-duplicates' is non-nil, identical subsequent
87 kills are not duplicated in the `kill-ring'.
89 ** File-local variable changes
91 *** Specifying a minor mode as a local variables enables that mode,
92 unconditionally. The previous behavior, toggling the mode, was
93 neither reliable nor generally desirable.
95 *** New commands for adding and removing file-local variables:
96 `add-file-local-variable', `delete-file-local-variable',
97 `add-file-local-variable-prop-line', and
98 `delete-file-local-variable-prop-line'.
100 *** New commands for adding and removing directory-local variables,
101 and copying them to and from file-local variable lists:
102 `add-dir-local-variable', `delete-dir-local-variable',
103 `copy-dir-locals-to-file-locals',
104 `copy-dir-locals-to-file-locals-prop-line' and
105 `copy-file-locals-to-dir-locals'.
107 ** New coding system `utf-8-hfs' is available in
108 international/ucs-normalize.el. It is suitable for
109 default-file-name-coding-system on Mac OS X.
112 * Editing Changes in Emacs 23.2
115 ** The default value for `blink-matching-paren-distance' has been increased.
118 * Changes in Specialized Modes and Packages in Emacs 23.2
120 ** .calc.el and .abbrev_defs obey user-emacs-directory.
122 ** Calc graphing commands (`g f' etc.) now work on MS-Windows,
123 if you have the native Windows port of Gnuplot version 3.8 or later
126 ** FIXME mail-user-agent change
127 This probably affects a lot of documentation.
133 *** The new command `Info-virtual-index' bound to "I" displays a menu of
134 matched topics found in the index.
136 *** The new command `info-finder' replaces finder.el with a virtual Info
137 manual that generates an Info file which gives the same information
138 through a menu structure.
141 ** New connection methods in Tramp.
142 The new connection method "rsyncc" has been introduced. On systems
143 which support GVFS-Fuse, Tramp offers also the new connection methods
144 "dav", "davs", "obex" and "synce".
147 ** Autorevert Tail mode
148 Autorevert Tail mode works now for remote files.
150 ** VC and related modes
152 *** When a file is not found, VC will not try to check it out of RCS anymore.
156 **** The new variable vc-git-add-signoff can be used to add a
157 Signed-off-by line when committing.
159 **** vc-dir displays the stash status
161 *** log-edit-strip-single-file-name controls whether or not single filenames
162 are stripped when copying text from the ChangeLog to the *VC-Log* buffer.
164 ** Calendar and diary
167 *** The command `calendar-current-date' accepts an optional argument
168 giving an offset from today.
173 *** The default value for `desktop-buffers-not-to-save' is nil.
174 This means Desktop will try restoring all buffers, when you restart
175 your Emacs session. Also, `desktop-buffers-not-to-save' is only
176 effective for buffers that have no associated file. If you want to
177 exempt buffers that do correspond to files, customize the value of
178 `desktop-files-not-to-save' instead.
182 *** The new command `async-shell-command' bound globally to `M-&' executes
183 the command asynchronously without the need to manually add ampersand to
184 the end of the command. Its output appears in the buffer `*Async Shell
188 *** Elint now uses compilation-mode, and recognizes more built-in
189 functions and variables.
192 * New Modes and Packages in Emacs 23.2
194 ** js.el is a new major mode for JavaScript files.
197 * Lisp changes in Emacs 23.2
199 ** All the default-FOO variables that hold the default value of the FOO
200 variable, are now declared obsolete.
202 ** read-key is a function halfway between read-event and read-key-sequence.
203 It reads a single key, but obeys input and escape sequence decoding.
205 ** start-process-shell-command start-file-process-shell-command only
206 take a single `command' argument any more.
208 ** The variable `process-file-side-effects' shall be bound to nil, if
209 a `process-file' call does not change a remote file. By this, file
210 name handlers like Tramp can apply optimizations.
212 ** Hash tables have a new printed representation that is readable.
213 The feature `hashtable-print-readable' identifies this new
216 ** Functions performing Unicode normalization are added. They are:
217 ucs-normalize-NFD-region, ucs-normalize-NFD-string,
218 ucs-normalize-NFC-region, ucs-normalize-NFC-string,
219 ucs-normalize-NFKD-region, ucs-normalize-NFKD-string,
220 ucs-normalize-NFKC-region, ucs-normalize-NFKC-string,
221 ucs-normalize-HFS-NFD-region, ucs-normalize-HFS-NFD-string,
222 ucs-normalize-HFS-NFC-region, ucs-normalize-HFS-NFC-string.
224 ** completion-annotate-function specifies how to compute annotations
225 for completions displayed in *Completions*.
227 ** Face aliases can now be marked as obsolete, using the macro
228 `define-obsolete-face-alias'.
231 * Installation Changes in Emacs 23.1
233 ** The default X toolkit is now Gtk+, rather than Lucid.
234 The configure option `--with-gtk' has been removed. Gtk is now the
235 default toolkit, but you can use --with-x-toolkit=gtk if necessary.
238 Fonts are handled by new code capable of dealing with multiple font
239 backends. This uses the freetype and fontconfig libraries.
241 *** Emacs now accepts font names supplied in the fontconfig format
242 (e.g. "monospace-12:bold") and GTK format (e.g. "Monospace Bold 12").
244 *** Added support for local fonts (fonts installed on the machine
245 where Emacs is running).
247 *** Added support for the Xft library for antialiasing.
249 *** Added support for the otf library for complex text layout by
252 *** Added support for the m17n library for text shaping.
254 ** Changes to image support
256 *** configure now checks for libgif before libungif when searching for
259 *** Emacs now supports the SVG image format through librsvg2.
261 *** Emacs now supports multi-page TIFF images.
263 ** New NeXTSTEP-based port
264 This provides support for GNUstep (via the GNUstep libraries) and Mac
265 OS X (via the Cocoa libraries).
267 Specify --with-ns to configure for this. By default, a self-contained
268 app will be built (containing all lisp). To install/share lisp with
269 other emacsen (e.g. X11 build) use --disable-ns-self-contained. See
270 nextstep/README and nextstep/INSTALL in the Emacs source directory.
272 ** Mac OS X is no longer supported via Carbon.
273 Use the NeXTSTEP port, described above.
275 ** The new configuration option "--with-dbus" enables D-Bus language
278 ** Support for many obsolete platforms has been removed.
279 See the list at the end of etc/MACHINES for details.
281 *** Support for systems without alloca has been removed.
283 *** Support for Sun windows has been removed.
285 *** The `emacstool' utility has been removed.
287 ** The following platforms will be removed in a future Emacs version:
288 If you are still using Emacs on one of these platforms, please email
289 emacs-devel@gnu.org to inform the Emacs developers.
291 *** Old GNU/Linux systems based on libc version 5.
293 *** Old FreeBSD, NetBSD, and OpenBSD systems based on the COFF
296 *** Solaris versions 2.6 and below.
298 *** Solaris on IBM RS6000 machines.
300 *** UNIX System V (the original SysV, not later platforms based on it).
302 *** Unixware on non-x86 machines.
304 *** Platforms not supporting shared libraries (i.e., requiring the
305 NO_SHARED_LIBS compilation flag).
307 ** The configure options `--with-gcc', `--without-gcc' have been removed.
308 Configure will use gcc by default. Set the CC environment variable if
309 you need control over which C compiler is used.
311 ** The refcards are now shipped as PDF files.
313 ** The manuals are now licensed under the GNU Free Documentation License v1.3,
314 or any later version.
316 ** Emacs 23 comes with a new set of default icons.
317 Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png.
318 The Emacs 22 icon is available as `emacs22.png' in the same location.
320 * Changes in Emacs 23.1
322 ** Improved X Window System support
324 *** Emacs now supports using both X displays and ttys in one session.
325 With an Emacs server active (M-x server-start), `emacsclient -t'
326 creates a tty frame connected to the running emacs server. You can
327 use any number of different ttys. `emacsclient -c' creates a new X11
328 frame on the current $DISPLAY (or a tty frame if $DISPLAY is not set).
329 There may be problems if a display exits unexpectedly and Emacs is compiled
330 with Gtk+, see etc/PROBLEMS.
332 You can test for the presence of this feature in your Lisp code by
333 testing for the `multi-tty' feature.
335 *** Emacs starts in the background, as a daemon, when given the
336 --daemon command line argument. It disconnects from the terminal and
337 starts the server. Clients can connect and create graphical or
338 terminal frames using emacsclient.
340 **** emacsclient starts emacs in daemon mode and connects to it when
341 --alternate-editor="" is used (or when the evironment variable
342 ALTERNATE_EDITOR is set to "") and emacsclient cannot connect to an
345 *** The new command close-display-connection closes a connection to a
346 remote display. There are some bugs for Gtk+. See etc/PROBLEMS.
348 *** Emacs now supports the XEmbed specification.
349 You can embed Emacs in another application on X11. The new command line
350 option --parent-id is used to pass the parent window id to Emacs. See
351 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
352 for details about XEmbed.
354 *** Emacs can now set the frame opacity.
355 The opacity of a frame can be controlled by setting the `alpha' frame
356 parameter. This only takes effect on a compositing window manager for
357 the X Window System, such as Compiz, Beryl and Compiz Fusion, on Mac
358 OS X, or on Windows 2000 and later versions of Windows.
360 The alpha parameter should be an integer between 0 (transparent) and
361 100 (opaque), or a float number between 0.0 and 1.0. It can also be a
362 cons cell (ACTIVE . INACTIVE), where ACTIVE is the opacity of an
363 active frame and INACTIVE is the opacity of non-active frames.
365 The variable `frame-alpha-lower-limit' defines a lower bound for the
366 opacity; the default is 20.
368 ** Internationalization changes
370 *** The Emacs character set is now a superset of Unicode.
371 (It has about four times the code space, which should be plenty).
373 The internal encoding used for buffers and strings is now
374 Unicode-based and called `utf-8-emacs' (`emacs-internal' is an alias
375 for this). This encoding is backward-compatible with Unicode's UTF-8
376 encoding. The internal encoding previously used by Emacs,
377 `emacs-mule', is still available for reading and writing files.
379 During byte-compilation, Emacs 23 uses `utf-8-emacs' to write files.
380 As a result, byte-compiled files containing non-ASCII characters can't
381 be read by earlier versions of Emacs. Files compiled by Emacs 20, 21,
382 or 22 are loaded correctly as `emacs-mule' (whether or not they
383 contain multibyte characters). This takes somewhat more time, so it
384 may be worth recompiling existing .elc files which don't need to be
385 shared with older Emacsen.
387 *** There are new coding systems/aliases; see M-x list-coding-systems.
389 *** There is a new charset implementation with many new charsets.
390 See M-x list-character-sets. New charsets can be defined conveniently
391 as tables of unicodes.
393 *** There are new language environments for Chinese-GBK,
394 Chinese-GB18030, Khmer, Bengali, Punjabi, Gujarati, Oriya, Telugu,
395 Sinhala, and TaiViet.
397 *** The minor modes unify-8859-on-encoding-mode and
398 unify-8859-on-decoding-mode are obsolete.
400 *** `ucs-insert' is bound to `C-x 8 RET' and in addition to hex numbers
401 accepts numbers in hash notation (e.g. #o21430 for octal, or #10r8984 for
402 decimal). It also accepts Unicode character names with completion.
404 *** The `cyrillic-translit' input method supports many new characters.
405 Common typographical characters available from Unicode were added to
406 `cyrillic-translit': punctuation marks, accented characters, fractions,
409 ** Emacs now supports serial port access on GNU/Linux, Unix, and
410 Windows. The new command `serial-term' starts an interactive terminal
411 on a serial port. The serial port can be configured at runtime with
412 the mode-line mouse menu.
416 *** In the Options menu, the "Set Default Font" item applies the
417 selected font to the `default' face on all frames, not just the
418 current frame. Furthermore, if Emacs is compiled with both GTK and
419 Fontconfig support, the "Set Default Font" item uses the GTK font
420 selection dialog instead of an Emacs pop-up menu.
422 *** The font setting chosen by "Set Default Font" is saved if the
423 "Save Options" item is used.
425 *** The Tools menu contains a new Encryption/Decryption submenu.
426 This contains commands provided by EasyPG, the newly-included
427 interface to GnuPG (see New Modes and Packages).
429 *** In the Options menu, the "Truncate Long Lines in the Buffer" entry
430 has been replaced with a submenu offering three different ways to
431 handle long lines: truncation, continuation at the window edge, and
432 the new word wrapping behavior (see Editing Changes, below).
434 *** Improvements to menus for major and minor modes
435 More major and minor modes now have a mode specific menu, and existing
436 mode menus have been improved to include more functionality.
440 *** The mode-line displays a `@', instead of `-', if the
441 default-directory for the current buffer is on a remote machine.
443 *** The mode-line displays a mode menu when mouse-1 is clicked on a
444 minor mode, in the same way as it already did for major modes.
446 *** The `mode-line-emphasis' face is used to highlight certain
447 mode-line information (e.g. waiting for a VC command to finish).
449 *** The mode-line tooltips have been improved to provide more details.
451 *** The VC, line/colum number and minor mode indicators on the mode
452 line are now interactive: mouse-1 can be used on them to pop up a menu.
454 ** File deletion can make use of the Recycle Bin or system Trash folder.
455 Set `delete-by-moving-to-trash' non-nil to use this. Deleted files
456 and directories will then be sent to the Recycle Bin on Windows, and
457 to `trash-directory' on other systems.
459 ** Directory-local variables can now be defined.
460 By default, Emacs looks in .dir-locals.el for directory-local
461 variables. For more information, see `dir-locals-set-directory-class'
462 and `dir-locals-set-class-variables'.
464 ** Emacs can now use `auth-source' for authentication.
465 `smtpmail' and `url' (Tramp and Gnus also) use `auth-source' to obtain
466 login names and passwords. The match, if found, is reported
467 in *Messages* with the password blanked out.
469 ** `where-is-preferred-modifier' can specify your favorite modifier.
472 * Startup Changes in Emacs 23.1
474 ** The option `inhibit-startup-screen' (with aliases to old names
475 `inhibit-splash-screen' and `inhibit-startup-message') doesn't inhibit
476 display of the initial message in the *scratch* buffer. If you don't
477 want to display the initial message in the *scratch* buffer at startup,
478 you can set the option `initial-scratch-message' to nil.
480 ** New user option `initial-buffer-choice' specifies what to display
481 after starting Emacs: startup screen, *scratch* buffer, visiting a
484 ** New alias `argv' for `command-line-args-left'
485 This is a convenience alias, so that one can write `(pop argv)'
486 inside of --eval command line arguments in order to access
489 ** The abbrev file is no longer read at startup in batch mode.
491 ** Emacs now supports invocation by an X session manager.
492 It can save a session and restore it later. See the documentation of
493 the functions `emacs-session-save' and `emacs-session-restore'.
494 (Actually, this feature was introduced with Emacs 22, but it was not
497 * Incompatible Editing Changes in Emacs 23.1
499 ** In Dired, `dired-flag-garbage-files' is rebound from `&' to `%&'
500 on the regexp command prefix map.
502 ** In Dired-x, all command guesses for ! are now added to the default
503 list accessible by M-n instead of pushing all guesses temporarily into
506 ** In Isearch mode, a special case of typing `C-w' at the beginning of
507 the minibuffer that toggles word search (i.e. using key sequences
508 `C-s RET C-w' or `C-s M-e C-w') is obsolete. You can use the global key
509 `M-s w' to start word search, or type `M-s w' in Isearch mode to
510 toggle word search. To start nonincremental word search you can now use
511 `M-s w RET' and `M-s w C-r RET' instead of `C-s RET C-w' and `C-r RET C-w'.
513 ** In Info, `Info-search' is unbound from `M-s' to allow using `M-s w'
514 for word search as well as other search commands from the global prefix
515 key `M-s'. `Info-search' is still bound to `s', and also incremental
516 search commands `C-s', `C-M-s', `C-r', `C-M-r' are available for searching
517 through multiple Info nodes, together with their nonincremental versions
518 `C-s RET', `C-r RET', `C-M-s RET', `C-M-r RET', `M-s w RET'.
520 ** In Text mode, `center-line' and `center-paragraph' are rebound from
521 `M-s' and `M-S' to global keys `M-o M-s' and `M-o M-S' on the global
522 prefix map `M-o', which is intended for such formatting commands.
524 ** The following input methods were removed in Emacs 22.2, but this was
525 not advertised: danish-alt-postfix, esperanto-alt-postfix,
526 finnish-alt-postfix, german-alt-postfix, icelandic-alt-postfix,
527 norwegian-alt-postfix, scandinavian-alt-postfix, spanish-alt-postfix,
528 and swedish-alt-postfix. Use the versions without "alt-", which are
532 * Editing Changes in Emacs 23.1
534 ** The C-n and C-p line-motion commands now move by screen lines,
535 taking continued lines and variable-width characters into account.
536 Setting `line-move-visual' to nil reverts this to the previous
537 behavior (i.e., motion by logical lines based on buffer contents
540 ** C-x C-c now invokes `save-buffers-kill-terminal', and C-z now
541 invokes `suspend-frame'. These changes are for compatibility with the
542 new multi-tty support (see `Improved X Window System support' above).
546 *** Transient Mark mode is now on by default.
548 *** mark-even-if-inactive now defaults to t
550 *** When Transient Mark mode is on, C-SPC C-SPC pushes a mark without
553 *** When Transient Mark mode is on, M-q now fills the region if the
554 region is active. Otherwise, it fills the current paragraph.
556 *** When Transient Mark mode is on, M-$ now checks spelling of the
557 region if the region is active. Otherwise, it checks spelling of the
560 *** When Transient Mark mode is on, TAB now indents the region if the
563 *** The variable `use-empty-active-region' controls whether an empty
564 active region in Transient Mark mode should make commands operate on
567 ** Temporarily active regions
569 *** The new variable shift-select-mode, non-nil by default, controls
570 shift-selection. When Shift Select mode is on, shift-translated
571 motion keys (e.g. S-left and S-down) activate and extend a temporary
572 region, similar to mouse-selection.
574 *** Temporarily active regions, created using shift-selection or
575 mouse-selection, are not necessarily deactivated in the next command.
576 They are only deactivated after point motion commands that are not
577 shift-translated, or after commands that would ordinarily deactivate
578 the mark in Transient Mark mode (e.g., any command that modifies the
581 ** Minibuffer and completion changes
583 *** Emacs may ask for confirmation before opening a non-existent file
584 or buffer. By default, Emacs requests confirmation if you type RET
585 immediately after TAB, and the resulting input is not an existing file
586 or buffer; this usually happens when the minibuffer input did not
587 complete far enough and you entered RET by mistake. In that case,
588 Emacs puts the message "[Confirm]" in the minibuffer; type RET again
589 to create the file or buffer.
591 The new variable confirm-nonexistent-file-or-buffer determines whether
592 Emacs asks for confirmation. The default value is `after-completion'.
593 If you change it to t, Emacs always asks for confirmation; if you
594 change it to nil, Emacs never asks for confirmation.
596 *** The rules for performing completion have been changed.
597 When generating completion alternatives, Emacs now takes the
598 minibuffer text after point, if any, into account: this text is
599 treated as a substring of the remaining part of the completion
600 alternative (i.e., the part not matched by the minibuffer text before
601 point). If no completion alternatives are found this way, Emacs
602 attempts to perform partial-completion. If still no completion
603 alternatives are found, we fall back on the Emacs 22 rules for
604 performing completion.
606 The new variable `completion-styles' can be customized to choose your
607 favorite completion style.
609 *** When M-n in the minibuffer reaches the end of the list of defaults,
610 it adds the completion list to the end, so next M-n continues putting
611 completion items to the minibuffer. The same principle applies to
612 incremental search commands as well: C-s or C-M-s starts searching
613 the default values and after the end of defaults they continue
614 searching minibuffer completion items.
616 *** Minibuffer input of shell commands now comes with completion.
618 *** In the `C-x d' (Dired) prompt, typing M-n gives the visited file
619 name of the current buffer.
621 *** In the M-! (shell-command) prompt, M-n provides some default commands.
622 These are guessed using the file extension of the current file, based
623 on the file-handlers specified in the operating system's `mailcap'
624 file. The ! command in Dired (dired-do-shell-command) works
625 similarly, using the file displayed on the current line.
627 *** A list of regexp default values is available via M-n for `occur',
628 `keep-lines', `flush-lines' and `how-many'. This list includes the active
629 region in transient-mark-mode, the word under the cursor, the last Isearch
630 regexp, the last Isearch string and the last replacement regexp.
632 *** When enable-recursive-minibuffers is non-nil, operations which use
633 switch-to-buffer (such as C-x b and C-x C-f) do not fail any more when
634 used in a minibuffer or a dedicated window. Instead, they fallback on
635 using pop-to-buffer, which will use some other window. This change
636 has no effect when enable-recursive-minibuffers is nil (the default).
638 *** Isearch started in the minibuffer searches in the minibuffer history.
639 Reverse Isearch commands (C-r, C-M-r) search in previous minibuffer
640 history elements, and forward Isearch commands (C-s, C-M-s) search in
641 next history elements. When the reverse search reaches the first history
642 element, it wraps to the last history element, and the forward search
643 wraps to the first history element. When the search is terminated, the
644 history element containing the search string becomes the current.
646 *** The variable read-file-name-completion-ignore-case overrides
647 completion-ignore-case for file name completion.
649 *** The variable read-buffer-completion-ignore-case overrides
650 completion-ignore-case for buffer name completion.
652 *** The new command `minibuffer-force-complete' chooses one of the
653 possible completions, rather than stopping at the common prefix.
655 *** If `completion-auto-help' is `lazy', Emacs shows the completions
656 buffer only on the second attempt to complete. This was already
657 supported in `partial-completion-mode'.
661 *** S-down-mouse-1 now pops up a menu for changing the font and text
662 size of the default face in the current buffer. The face is changed
663 via face remapping (see Lisp changes, below).
665 *** New commands to change the default face size in the current buffer.
666 To increase it, type `C-x C-+' or `C-x C-='. To decrease it, type
667 `C-x C--'. To restore the default (global) face size, type `C-x C-0'.
668 These work via Text Scale mode, a new minor mode.
670 The final key in the above commands may be repeated without the
671 leading `C-x', e.g. `C-x C-= C-= C-=' increases the face height by
672 three steps. Each step scales the height of the default face by the
673 value of the variable `text-scale-mode-step'.
675 *** The commands buffer-face-mode and buffer-face-set can be used to
676 remap the default face in the current buffer. See "Buffer Face mode",
677 under New Modes and Packages.
679 ** Primary selection changes
681 *** You can disable kill ring commands from accessing the primary
682 selection by setting `x-select-enable-primary' to nil.
684 ** Continuation lines can now be wrapped at word boundaries
685 (word-wrapping). This is controlled by the new per-buffer variable
686 `word-wrap'. Word wrapping does not take place if continuation lines
687 are not shown, e.g. if truncate-lines is non-nil. The most convenient
688 way to enable word-wrapping is using the new minor mode Visual Line
689 mode; in addition to setting `word-wrap' to t, this rebinds some
690 editing commands to work on screen lines rather than text lines. See
691 New Modes and Packages, below.
693 ** Window management changes
695 *** truncate-partial-width-windows now accepts integer values, which
696 specify a minimum window width for partial-width windows, below which
697 lines are truncated. The default has been changed to 50.
699 *** The new command balance-windows-area balances windows both
700 vertically and horizontally.
702 *** pop-to-buffer now always sets input focus when the popped-to window
703 is on a different frame.
705 ** Miscellaneous changes:
707 *** C-l is bound to the new command recenter-top-bottom, rather than recenter.
708 This moves the current line to window center, top and bottom on
709 successive invocations.
711 *** scroll-preserve-screen-position also preserves the column position.
713 *** If `yank-pop-change-selection' is t, rotating the kill ring also
714 updates the selection or clipboard to the current yank, just as M-w
715 would do so with the text it copies to the kill ring.
717 *** C-M-% now shows replacement as it would look in the buffer, with
718 `\N' and `\&' substituted according to the match. Old behavior can be
719 restored by customizing `query-replace-show-replacement'.
721 *** The command shell prompts for the default directory, when it is
722 called with a prefix and the default directory is a remote file name.
723 This is because some file name handlers (like ange-ftp) are not able to
724 run processes remotely.
726 *** The new command kill-matching-buffers kills buffers whose name
729 *** The value of comment-style now defaults to `indent'.
730 Thefore, comment-start markers are inserted at the current indentation
731 of the region to comment, rather than the leftmost column.
733 *** The new commands `pp-macroexpand-expression' and
734 `pp-macroexpand-last-sexp' pretty-print macro expansions.
736 *** The new command `set-file-modes' allows to set file's mode bits.
737 The mode bits can be specified in symbolic notation, like with GNU
738 Coreutils, in addition to an octal number. `chmod' is a new
739 convenience alias for this function.
741 *** `next-error-recenter' specifies how next-error should recenter the
742 visited source file. Its value can be a number (for example, 0 for
743 top line, -1 for bottom line), or nil for no recentering.
745 *** When typing in a password in the echo area, C-y yanks the current
746 kill into the password.
748 *** Tooltip frame parameters `font' and `color' in `tooltip-frame-parameters'
749 are ignored. Customize the `tooltip' face instead.
751 *** `mkdir' is a new convenience alias for `make-directory'.
753 * New Modes and Packages in Emacs 23.1
755 ** Auto Composition Mode is a minor mode that composes characters
756 automatically when they are displayed. It is globally on by default.
757 It uses `auto-composition-function' (default `auto-compose-chars').
759 ** Bubbles, a new game, is similar to SameGame.
761 ** Buffer Face mode is a minor mode for remapping the default face in
762 the current buffer. The variable `buffer-face-mode-face' specifies
763 the face to remap to. The command `buffer-face-set' prompts for a
764 face name, sets `buffer-face-mode-face' to it, and enables
765 buffer-face-mode. See "Face changes", under Editing Changes, for a
766 description of face remapping.
768 ** butterfly flips the desired bit on the drive platter.
769 See http://xkcd.com/378/
771 ** bug-reference.el provides clickable links to bug reports.
773 ** dbus.el provides D-Bus language bindings.
774 D-Bus is an inter-process communication mechanism for applications
775 residing on the same host. See the manual for details.
777 ** DocView mode allows viewing of PDF, PostScript and DVI documents.
778 One can also search for a regular expression in the document. For
779 details, see the commentary in doc-view.el.
781 PDF and DVI files are now opened in Doc View mode by default.
783 In Postcript mode, C-c C-c launches Doc View minor mode for viewing
786 ** EasyPG provides an interface to the GNU Privacy Guard (GnuPG).
787 It includes a GnuPG keyring browser, cryptographic operations on
788 regions and files, and automatic encryption of *.gpg files. For
789 details, see the EasyPG Assistant User's Manual.
791 ** json.el is a library for parsing and generating JSON
792 (JavaScript Object Notation), a lightweight data-interchange format.
794 ** linum.el is a new minor mode to display line numbers for the
797 ** mairix.el is an interface to mairix, a free tool for indexing and
798 searching locally stored mail. It allows you to query mairix and
799 display the search results with Rmail, Gnus and VM. Note that there
800 is an existing Gnus back end, nnmairix.el, which should be used with
803 ** minibuffer-depth-indicate-mode shows the minibuffer depth in the prompt.
806 This is a new mode for editing XML documents. It allows a schema to
807 be associated with the XML document being edited, using Relax NG as
808 the schema language. The schema is used to provide two key features:
810 *** Continuous validation. nXML validates as you type, highlighting
811 any invalid parts of your document.
813 *** Completion. nXML can assist you in entering an element name,
814 attribute name or data value by using information about what is
815 allowed by the schema in that context.
817 ** proced.el provides a Dired-like interface for operating on
818 processes. Proced makes an Emacs buffer containing a listing of the
819 current processes. You can use the normal Emacs commands to move
820 around in this buffer, and special Proced commands to operate on the
821 processes listed. It is currently only functional on GNU/Linux,
822 MS-Windows and Solaris.
824 ** Remember Mode is a mode for jotting down things to remember.
825 Notes can be saved to a Diary file. For details, see the Remember
828 ** RST mode is a major mode for editing reStructuredText files.
830 ** Ruby mode is a major mode for Ruby files.
832 ** Visual Line mode provides support for editing by visual lines.
833 It turns on word-wrapping in the current buffer, and rebinds C-a, C-e,
834 and C-k to commands that operate by visual lines instead of logical
835 lines. This is a more reliable replacement for longlines-mode.
836 This can also be turned on using the menu bar, via
837 Options -> Line Wrapping in this Buffer -> Word Wrap
839 ** xesam.el is an implementation of Xesam, an interface to (desktop)
840 search engines like Beagle, Strigi, and Tracker. The Xesam API
841 requires D-Bus for communication.
843 ** zeroconf.el offers service discovery and service publishing
844 interfaces according to the zeroconf specification. It communicates
845 with Avahi, a zeroconf implementation, via D-Bus messages on systems
846 which have installed this software.
848 ** There is a new `whitespace' package.
849 (The pre-existing one has been renamed to `old-whitespace'.)
850 Now, besides reporting bogus blanks, the whitespace package has a
851 minor mode and a global minor mode to visualize blanks (TAB, (HARD)
852 SPACE and NEWLINE). The visualization is made via faces and/or display
853 table. It can also indicate lines that extend beyond a given column,
854 trailing blanks, and empty lines at the start or end of a buffer.
855 See `whitespace-style' for more details. The `whitespace-action' option
856 specifies what to do when a buffer is visited, killed, or written.
859 * Changes in Specialized Modes and Packages in Emacs 23.1
861 ** Abbrev has been rewritten in Elisp and extended with more flexibility.
863 *** New functions: abbrev-get, abbrev-put, abbrev-table-get, abbrev-table-put,
864 abbrev-table-p, abbrev-insert, abbrev-table-menu.
866 *** Special hook `abbrev-expand-functions' obsoletes `pre-abbrev-expand-hook'.
868 *** `make-abbrev-table', `define-abbrev', `define-abbrev-table' all take
869 extra arguments for arbitrary properties.
871 *** New variable `abbrev-minor-mode-table-alist'.
873 *** `local-abbrev-table' can hold a list of abbrev-tables.
875 *** Abbrevs have now the following special properties:
876 `:count', `:system', `:enable-function', `:case-fixed'.
878 *** Abbrev-tables have now the following special properties:
879 `:parents', `:case-fixed', `:enable-function', `:regexp',
880 `abbrev-table-modiff'.
884 *** `apropos-library' describes the elements defined in a given library.
886 *** Set `apropos-compact-layout' is you want a more compact (but wider) layout.
888 ** Archive Mode has basic support to browse Rar archives.
889 Note, however, that the free version of the unrar command only handles
890 versions 1 and 2 of the Rar format.
894 *** New command `bibtex-initialize' (re)initializes BibTeX buffers.
896 *** New `bibtex-entry-format' options `whitespace', `braces', and
897 `string', disabled by default.
899 *** New variable `bibtex-cite-matcher-alist' contains rules to
900 identify cited keys in BibTeX entries, used by `bibtex-find-crossref'.
902 *** Command `bibtex-url' allows multiple URLs per entry.
904 ** Calendar and diary
906 *** There is a new date style, `iso', essentially year/month/day.
907 The variable `european-calendar-style' is obsolete - use `calendar-date-style'.
908 Similarly, the commands `american-calendar' and `european-calendar'
909 should be replaced by `calendar-set-date-style'.
911 *** The calendar namespace has been rationalized.
912 All functions and variables now begin with a `calendar-', `diary-', or
913 `holiday-' prefix. The various calendar systems have secondary
914 prefixes, eg `calendar-french-'. The old names you are likely to use
915 directly still exist, for the time being, as aliases, but please start
918 *** The whitespace in the calendar layout can be customized.
920 calendar-left-margin, calendar-intermonth-spacing, calendar-column-width,
921 calendar-day-header-width, and calendar-day-digit-width.
923 *** Text (e.g. ISO weeks) can be displayed between the calendar months.
924 See the variables calendar-intermonth-header and calendar-intermonth-text.
926 *** The function `holiday-chinese' computes holidays on the Chinese calendar.
927 It has been used to add items to the list `holiday-oriental-holidays'.
929 *** `diary-remind' accepts a negative number -DAYS as a shorthand for
930 the list (1 2 ... DAYS).
934 *** The new command C-c C-f (change-log-find-file) finds the file
935 associated with the current log entry.
937 *** The new command C-c C-c (change-log-goto-source) goes to the
938 source code associated with a log entry.
940 ** Compile and grep modes
942 *** The mode-line entry for the *compilation* and *grep* buffer is color coded.
943 It has different colors for to show that: (a) the command is still
944 running, (b) successful completion, (c) error.
946 *** compilation-auto-jump-to-first-error tells `compile' to jump to
947 the first error encountered during compilations.
949 *** compilation-scroll-output accepts a new value, `first-error', which
950 says to stop auto scrolling at the first error that occurs.
952 *** The `cc' alias for C++ files in `grep-file-aliases' has been
953 improved. `hh' can be used to match C++ header files and `cchh' both
954 C++ sources and headers.
958 *** You can specify your copyright holders' names.
959 Only copyright lines with holders matching `copyright-names-regexp' are
960 considered for update.
962 *** Copyrights can be at the end of the buffer.
963 This is controlled by `copyright-at-end-flag' (used by, e.g., change-log-mode).
967 *** defcustom accepts new keyword arguments, `:safe' and `:risky', which
968 set a variable's `safe-local-variable' and `risky-local-variable' property.
972 *** diff-refine-hunk highlights word-level details of changes in a diff hunk.
973 It's used automatically as you move through hunks, see
974 diff-auto-refine-mode. It is bound to `C-c C-b'.
976 *** diff-add-change-log-entries-other-window iterates through the diff
977 buffer and tries to create ChangeLog entries for each change.
978 It is bound to `C-x 4 A'.
980 *** Turning on `whitespace-mode' in a diff buffer will show trailing
981 whitespace problems in the modified lines.
985 *** In Dired, C-x C-q now runs the command wdired-change-to-wdired-mode,
986 and C-x C-q in wdired-mode exits it with asking a question about
989 *** `&' runs the command `dired-do-async-shell-command' that executes
990 the command asynchronously without the need to manually add ampersand
991 to the end of the command. Its output appears in the buffer `*Async Shell
994 *** `M-s f C-s' and `M-s f M-C-s' run Isearch that matches only at file names.
995 When a new user option `dired-isearch-filenames' is t, then even ordinary
996 Isearch started with `C-s' and `C-M-s' matches only at file names in the
997 Dired buffer. When `dired-isearch-filenames' is `dwim' then activation of
998 file name Isearch depends on the position of point - if point is on a file
999 name initially, then Isearch matches only file names, otherwise it matches
1000 everywhere in the Dired buffer. You can toggle file names matching on or
1001 off by typing `M-s f' in Isearch mode.
1003 *** `M-s a C-s' and `M-s a M-C-s' run multi-file Isearch on the marked files.
1004 They visit the first marked file in the sequence and display the usual Isearch
1005 prompt for a string or a regexp where all Isearch commands are available.
1007 *** `Q' in Dired provides two new keys for multi-file replacement.
1008 The upper case key `Y' replaces all remaining matches in all remaining files
1009 with no more questions. The upper case key `N' stops doing replacements
1010 in the current file and skips to the next file. These multi-file keys
1011 are available for all commands that use `tags-query-replace'
1012 including `dired-do-query-replace-regexp', `vc-dir-query-replace-regexp',
1013 `reftex-query-replace-document'.
1017 *** The line length of fixed-form Fortran is not fixed at 72 any more.
1018 Customize the variable `fortran-line-length' to change it.
1020 *** In Fortran mode, M-; is now bound to the standard comment-dwim,
1021 rather than fortran-indent-comment.
1023 *** (The increasingly misnamed) F90 mode supports Fortran 2003 syntax.
1027 *** The Gnus package has been updated
1028 There are many news features, bug fixes and improvements; see the file
1029 GNUS-NEWS or the node "No Gnus" in the Gnus manual for details.
1031 *** In Emacs 23, Gnus uses Emacs' new internal coding system `utf-8-emacs' for
1032 saving articles drafts and ~/.newsrc.eld. These file may not be read
1033 correctly in Emacs 22 and below. If you want to Gnus across different Emacs
1034 versions, you may set `mm-auto-save-coding-system' to `emacs-mule'.
1036 *** Passwords are consistently loaded through `auth-source'
1037 Gnus can use `auth-source' for POP and IMAP passwords. Also see that
1038 `smtpmail' and `url' support `auth-source' for SMTP and HTTP/HTTPS/RSS
1039 authentication respectively.
1043 *** New macro `with-help-window' should set up help windows better
1044 than `with-output-to-temp-buffer' with `print-help-return-message'.
1046 *** New option `help-window-select' permits to customize whether help
1047 window shall be automatically selected when invoking help.
1049 *** New variable `help-window-point-marker' permits one to specify a new
1050 position for point in help window (for example in `view-lossage').
1054 *** New command `isearch-forward-word' bound globally to `M-s w' starts
1055 incremental word search. New command `isearch-toggle-word' bound to the
1056 same key `M-s w' in Isearch mode toggles word searching on or off
1057 while Isearch is active.
1059 *** New command `isearch-highlight-regexp' bound to `M-s h r' in Isearch
1060 mode runs `highlight-regexp' (`hi-lock-face-buffer') with the current
1061 search string as its regexp argument. The same key `M-s h r' and
1062 other keys on the `M-s h' prefix are bound globally to the command
1063 `highlight-regexp' and other hi-lock commands.
1065 *** New command `isearch-occur' bound to `M-s o' in Isearch mode
1066 runs `occur' with the current search string. The same key `M-s o'
1067 is bound globally to the command `occur'.
1069 *** Isearch can now search through multiple ChangeLog files.
1070 When running Isearch in a ChangeLog file, if the search fails,
1071 then another C-s tries searching the previous ChangeLog,
1072 if there is one (e.g. going from ChangeLog to ChangeLog.12).
1073 This is enabled if multi-isearch-search is non-nil.
1075 *** Two new commands to start Isearch on a list of marked buffers
1076 for buff-menu.el and ibuffer.el are bound to the keys `M-s a C-s' and
1079 *** The part of an Isearch that failed to match is highlighted in
1080 `isearch-fail' face.
1082 *** `C-h C-h' in Isearch mode displays isearch-specific Help screen,
1083 `C-h b' displays all Isearch key bindings, `C-h k' displays the full
1084 documentation of the given Isearch key sequence, `C-h m' displays
1085 documentation of Isearch mode. All the rest Help commands exit Isearch mode
1086 and execute their global definitions.
1088 *** When started in the minibuffer, Isearch searches in the minibuffer
1089 history. See `Minibuffer changes', above.
1093 *** Upgraded to MH-E version 8.2. See MH-E-NEWS for details.
1096 *** The file etc/emacs.py now supports both Python 2 and 3, meaning
1097 that either version can be used as inferior Python by python.el.
1099 *** Python mode now has `pdbtrack' functionality. When using pdb to
1100 debug a Python program, pdbtrack notices the pdb prompt and displays
1101 the source file and line that the program is stopped at, much the same
1102 way as gud-mode does for debugging C programs with gdb.
1106 *** The default value of `recentf-keep' prevents from checking of
1107 remote files, if there is no established connection to the
1108 corresponding remote host.
1112 *** Rmail no longer converts the messages to Babyl format.
1113 Instead, it uses UNIX mbox format, both on disk and in Rmail buffers,
1114 and does conversion and decoding when a message is displayed.
1116 The first time you visit an Rmail file in Babyl format, Rmail
1117 automatically converts it to mbox format. This is a one-time
1118 conversion, but it can take a few minutes, depending on how fast is
1119 your machine and on the size of the file. You should find the rest of
1120 Rmail usage unaltered.
1122 However, M-x set-rmail-inbox-list now lasts only for one session
1123 because there is no way to save the list of inbox files in an
1126 Also, whereas with Babyl format M-x find-file would switch to Rmail
1127 mode, with mbox format this is no longer the case (there being no way
1128 to add an "-*- rmail-*-" cookie to an mbox file). Use C-u M-x rmail
1131 If you have written any extensions to Rmail, they are likely to need
1132 updating. Conceptually, the Rmail buffer that you see is no longer
1133 just a narrowed portion of the whole. So you cannot access the whole
1134 of a message (or message collection) by a simple save-restriction and
1135 widen. Instead, there are two buffers: the rmail-buffer, and the
1136 rmail-view-buffer. The former is the buffer that you see, the latter
1137 is invisible. Most of the time, the invisible `view' buffer contains
1138 the full contents of the Rmail file, and the Rmail buffer contains a
1139 decoded copy of the current message (with only a subset of the
1140 headers). In this state, Rmail is said to be `swapped'.
1142 You may find the following functions useful:
1144 `rmail-get-header' and `rmail-set-header' get or set the value of a
1145 message header, whether or not it is currently visible.
1147 `rmail-apply-in-message' is a general purpose function that calls a
1148 function (with arguments) which you specify on the full text of a given
1149 message. To further narrow to just the headers, search forward for "\n\n".
1151 *** The new command `rmail-mime' displays MIME messages.
1152 It is bound to `v' in Rmail buffers and summaries. It displays plain
1153 text and multipart messages in a temporary buffer, and offers buttons
1154 to save attachments.
1156 *** The command `rmail-redecode-body' no longer accepts the optional arg RAW.
1157 Since Rmail now holds messages in their original undecoded form in a
1158 separate buffer, `rmail-redecode-body' no longer encodes the original
1159 message, and therefore there should be no need to avoid encoding it.
1161 *** The o command is now `rmail-output'. It is an all-purpose command
1162 for copying messages from Rmail and appending them to files. It
1163 handles Babyl-format files as well as mbox-format files, and it
1164 handles both kinds properly when they are visited in Emacs. It always
1165 copies the full headers of the message.
1167 *** The C-o command is now `rmail-output-as-seen'. It uses
1168 the message as displayed, appending it to an mbox file.
1170 *** The modified status of the Rmail buffer is reported in the mode-line.
1171 Previously, this information was hidden.
1175 *** New option latex-indent-within-escaped-parens
1176 permits to customize indentation of LaTeX environments delimited
1181 *** If the gpm mouse server is running and t-mouse-mode is enabled,
1182 Emacs uses a Unix socket in a GNU/Linux console to talk to server,
1183 rather than faking events using the client program mev. This C level
1184 approach provides mouse highlighting and help echoing in the
1189 *** New connection methods.
1190 The new methods "plinkx", "plink2", "psftp", "sftp" and "fish" have
1191 been introduced. There are also new so-called gateway methods
1192 "tunnel" and "socks".
1195 IPv6 addresses are supported now as host names. They must be embedded
1196 in square brackets, like in "/ssh:[::1]:".
1198 *** Multihop syntax has been removed.
1199 The pseudo-method "multi" has been removed. Instead, multi hops
1200 can be specified by the new variable `tramp-default-proxies-alist'.
1202 *** More default settings.
1203 Default values can be set via the variables `tramp-default-user',
1204 `tramp-default-user-alist' and `tramp-default-host'.
1206 *** Connection information is cached.
1207 In order to reduce connection setup, information about used
1208 connections is kept persistently in a file. The name of this file is
1209 defined in the variable `tramp-persistency-file-name'.
1211 *** Control of remote processes.
1212 Running processes on a remote host can be controlled by settings in
1213 `tramp-remote-path' and `tramp-remote-process-environment'.
1215 *** Success of remote copy is checked.
1216 When the variable `file-precious-flag' is set, the success of a remote
1217 file copy is checked via the file's checksum.
1219 *** Passwords can be read from an authentification file.
1220 Tramp uses the package `auth-source' to read passwords from a file, if
1223 ** VC and related modes
1225 *** VC now supports applying VC operations to a set of files at a time.
1226 This enables VC to work much more effectively with changeset-oriented
1227 version-control systems such as Subversion, GNU Arch, Mercurial, Git
1228 and Bzr. VC will now pass a multiple-file commit to these systems as
1231 *** vc-dir is a new command that displays file names and their VC
1232 status. It allows to apply various VC operations to a file, a
1233 directory or a set of files/directories.
1235 *** VC switches are no longer appended, rather the first non-nil value is used.
1236 (This was for the most part true in Emacs 22, but was not advertised).
1237 This is because there is an increasing variety of VC systems, and they
1238 do not all accept the same "common" options. For example, a CVS diff
1239 command used to append the values of `vc-cvs-diff-switches',
1240 `vc-diff-switches', and `diff-switches'. Now the first non-nil value
1241 from that sequence is used. The special value `t' means "no switches".
1243 *** Clicking on the VC mode-line entry now pops the VC menu.
1245 *** The VC mode-line entry now has a tooltip that explains the VC file status.
1247 *** In VC Annotate mode, the key bindings have changed to use lower
1248 case keys instead of the upper case keys used in the past.
1250 *** In VC Annotate mode, for VC systems that support changesets, you can
1251 see the diff for the whole changeset (not only for the current file)
1252 by typing the D key. Using the "Show changeset diff of revision at
1253 line" menu entry does the same thing.
1255 *** In VC Annotate mode, you can type v to toggle the annotation visibility.
1257 *** In VC Annotate mode, you can type f to show the file revision on
1260 *** Asynchronous VC commands display [Waiting...] in the mode-line
1261 of the corresponding buffer as long as the asynchronous process is
1264 *** Log entries can be modified using the key "e" in log-view.
1265 For now only CVS, RCS, SCCS and SVN support this functionality.
1266 This is done by the `modify-change-comment' backend function.
1268 *** In log-view-mode, for VC systems that support changesets, you can
1269 see the diff for the whole changeset (not only for the current file)
1270 by typing the D key or using the "Changeset Diff" menu entry.
1272 *** In Log Edit mode, C-c C-d now shows the diff for the files involved.
1274 *** vc-git supports the "git grep" command.
1276 *** VC Support for Meta-CVS has been removed for lack of a maintainer able
1277 to update it to the new VC.
1281 *** comint-mode uses `start-file-process' now (see Lisp Changes).
1282 If `default-directory' is a remote file name, subprocesses are started
1283 on the corresponding remote system.
1285 *** Eldoc highlights the function argument under point
1286 with the face `eldoc-highlight-function-argument'.
1288 *** In Etags, the --members option is now the default.
1289 Use --no-members if you want the old default behavior of not tagging
1290 struct members in C, members variables in C++ and variables in PHP.
1292 *** The `gdb' command only works with the graphical interface now.
1293 Use `gud-gdb' if you want the (old) text command mode.
1295 *** goto-address.el provides two new minor modes, goto-address-mode and
1296 goto-address-prog-mode, which buttonize URLS and email addresses.
1298 *** The new command `eshell/info' runs info in an eshell buffer.
1300 *** The new variable `ffap-rfc-directories' specifies a list of local
1301 directories in which `ffap-rfc' will first search for RFCs.
1303 *** hide-ifdef-mode allows shadowing ifdef-blocks instead of hiding them.
1304 See option `hide-ifdef-shadow' and function `hide-ifdef-toggle-shadowing'.
1306 *** `icomplete-prospects-height' now supercedes `icomplete-prospects-length'.
1308 *** Info displays breadcrumbs in the header of the page.
1309 See Info-breadcrumbs-depth to control it.
1311 *** net-utils has an `iwconfig' command, similar to the existing `ifconfig'.
1312 It is used to configure wireless interfaces.
1314 *** The pcmpl-unix package supports hostname completion for ssh and scp.
1316 *** sgml-electric-tag-pair-mode lets you simultaneously edit matched tag pairs.
1318 *** smerge-refine highlights word-level details of changes in conflict.
1319 It's used automatically as you move through conflicts, see
1320 smerge-auto-refine-mode.
1322 *** talk.el has been extended for multiple tty support.
1324 *** A new command `display-time-world' has been added to the Time
1325 package. It creates a buffer with an updating time display using
1328 *** The appearance of superscript and subscript in TeX is more customizable.
1329 See the documentation of the variables: tex-fontify-script,
1330 tex-font-script-display, tex-suscript-height-ratio, and
1331 tex-suscript-height-minimum.
1333 *** view-remove-frame-by-deleting is now by default t
1334 since users found iconification of view-mode frames distracting.
1336 *** WoMan tries to add locale-specific manual page directories to the
1337 search path. This can be disabled by setting `woman-locale' to nil.
1340 * Changes in Emacs 23.1 on non-free operating systems
1342 ** Case is now considered significant in completion on MS-Windows.
1343 The default value of `completion-ignore-case' is now nil on
1344 MS-Windows, the same as it is for other operating systems. The
1345 variable doesn't apply to reading a file name -- in that case Emacs
1346 heeds `read-file-name-completion-ignore-case' instead.
1348 ** IPv6 is supported on MS-Windows.
1349 Emacs now supports IPv6 on Windows XP and later, and earlier versions
1350 of Windows with third party IPv6 stacks installed. In Emacs 22, IPv6 was
1351 supported on other platforms, but not on Windows due to using the winsock
1352 1.1 header file, even though Emacs was linking to the winsock 2 library.
1354 ** Busy cursor (hourglass) now displays on MS-Windows.
1355 When Emacs is busy, an hourglass mouse cursor is displayed on Windows.
1356 In Emacs 22 only X supported the busy cursor.
1358 ** Battery status is available on MS-Windows
1359 Emacs can now display the battery status in the mode-line when enabled with
1360 display-battery-mode or from the Options menu. More verbose battery
1361 information is also available with the command `battery'. In Emacs 22
1362 battery status was supported only on GNU/Linux and Mac.
1364 ** More keys available on MS-Windows.
1365 Keys normally associated with IMEs, and some exotic keys not normally found
1366 on standard keyboards have been given names so they can be bound to functions
1367 inside Emacs. If there are keys on your keyboard that have not been exposed
1368 to Emacs in the past, try C-h k to see if they are available now.
1370 Emacs can now bind functions to the extra buttons for media player and
1371 browser control present on some keyboards. These buttons are disabled
1372 by default, since enabling them prevents their system-wide use when
1373 Emacs has focus. To enable them, set the variable
1374 w32-pass-multimedia-buttons to nil. See the doc string of that variable
1375 for the list of extra keys that are available.
1377 ** BDF fonts no longer supported on MS-Windows.
1378 The font backend was completely rewritten for this release. The focus
1379 on Windows has been getting acceptable performance and full unicode
1380 support, including complex script shaping for native Windows fonts. A
1381 rewrite of the BDF font support has not happened due to lack of time
1382 and developers. If demand still exists for such a backend even with
1383 the improved language support for native Windows fonts, future
1384 development in this direction will most likely be based on the
1385 freetype library, giving access to a wider range of font formats.
1388 * Incompatible Lisp Changes in Emacs 23.1
1390 ** Variables cannot be both buffer-local and frame-local any more.
1392 ** `functionp' returns nil for special forms.
1393 I.e., it only returns t for objects that can be passed to `funcall'.
1395 ** The behavior of map-char-table has changed. It may call the
1396 specified function with a cons (FROM . TO) as a key if characters in
1397 that range have the same value.
1401 *** The function `dired-call-process' has been removed.
1403 *** The multibyteness of process filters is now determined by the
1404 coding-system used for decoding. The functions
1405 `process-filter-multibyte-p' and `set-process-filter-multibyte' are
1408 ** The variable `byte-compile-warnings' can now be a list starting with `not',
1409 meaning to disable the specified warnings. The meaning of this list
1410 may therefore be the reverse of what you expect (of course, this is
1411 only an issue if you make use of the new `not' syntax). Rather than
1412 checking/manipulating elements directly, use the new functions
1413 `byte-compile-warning-enabled-p', `byte-compile-disable-warning', and
1414 `byte-compile-enable-warning.'
1416 ** `mode-name' is no longer guaranteed to be a string.
1417 Use `(format-mode-line mode-name)' to ensure a string value.
1419 ** The function x-font-family-list has been removed.
1420 Use the new function font-family-list (see Lisp Changes, below).
1422 ** Internationalization changes
1424 *** The value of the function `charset-id' is now always 0.
1426 *** The functions `register-char-codings' and `coding-system-spec'
1429 *** The cpXXX coding systems are now supported automatically.
1430 The functions cp-...-codepage, which you had to use in Emacs 22 to
1431 enable support for these coding systems, have been deleted.
1433 *** The following features have been removed. They were used for
1434 displaying various scripts with specific fonts, and are no longer
1435 needed now that OpenType font support is available:
1437 **** `devanagari' and `devan-util', and all associated devanagari-* and
1438 dev-* functions and variables (formerly used for Devanagari script).
1440 **** `kannada' and `knd-util', and all associated kannada-* and knd-*
1441 functions and variables (formerly used for Kannada script).
1443 **** `malayalam' and `mlm-util', and all associated malayalam-* and
1444 mlm-* functions and variables (formerly used for Malayalam script).
1446 **** `tamil' and `tml-util, and all associated tamil-* and tml-*
1447 functions and variables (formerly used for Tamil script).
1449 *** The meaning of NAME argument of `set-fontset-font' is changed.
1450 Previously nil is accepted as the default fontset. Now, nil is for
1451 the fontset of the selected frame and t is for the default fontset.
1453 *** The meaning of FONTSET argument of `print-fontset' is changed.
1454 Now, nil is for the fontset of the selected frame and t is for the
1457 ** If a function in write-region-annotate-functions returns with a
1458 different buffer current, Emacs no longer kills that buffer
1459 automatically. This behavior existed in previous versions of Emacs,
1460 but was undocumented. To kill a buffer after write-region, give the
1461 variable `write-region-post-annotation-function' a buffer-local value
1464 ** The variable temp-file-name-pattern has been removed.
1465 This variable was only used by call-process-region, which now uses
1466 temporary-file-directory instead.
1468 ** The COUNT and SYSTEM-FLAG arguments to define-abbrev have been
1469 removed. The function now takes extra arguments for specifying
1470 arbitrary abbrev properties.
1472 ** end-of-defun-function is now guaranteed to work only when called
1473 from the start of a defun. It must now leave point exactly at the end
1474 of defun, since `end-of-defun' now itself moves forward over
1475 whitespace after calling it.
1478 * Lisp Changes in Emacs 23.1
1480 ** The new variable `generate-autoload-cookie' controls the magic comment
1481 string used by `update-file-autoloads' to find autoloaded forms. The
1482 variable `generated-autoload-file' similarly controls the name of the
1483 file where `update-file-autoloads' writes the calls to `autoload'.
1484 The default values are ";;;###autoload" and `loaddefs.el',
1487 ** New primitives `list-system-processes' and `process-attributes'
1488 let Lisp programs access the processes that are running on the local
1489 machine. See the doc strings of these functions for more details.
1490 Not all platforms support accessing this information; on those that
1491 don't, these primitives will return nil.
1493 ** New variable `user-emacs-directory'.
1494 Use this instead of "~/.emacs.d".
1496 ** If a local hook function has a non-nil `permanent-local-hook'
1497 property, `kill-all-local-variables' does not remove it from the local
1498 value of the hook variable; it remains even if you change major modes.
1500 ** `frame-inherited-parameters' lets new frames inherit parameters from
1503 ** New keymap `input-decode-map' overrides like key-translation-map, but
1504 applies before function-key-map. Also it is terminal-local contrary to
1505 key-translation-map. Terminal-specific key-sequences are generally added to
1506 this map rather than to function-key-map now.
1508 ** `ignore-errors' is now a standard macro (does not require the CL package).
1510 ** `interprogram-paste-function' can now return one string or a list
1511 of strings. In the latter case, Emacs puts the second and following
1512 strings on the kill ring.
1514 ** In `condition-case', a handler can specify "let the debugger run first".
1515 You do this by writing `debug' in the list of conditions to be handled,
1520 ((debug error) nil))
1522 ** clone-indirect-buffer now runs the clone-indirect-buffer-hook.
1524 ** `beginning-of-defun-function' now takes one argument, the count given to
1525 `beginning-of-defun'. (N.B. `end-of-defun-function' doesn't take any
1528 ** `file-remote-p' has new optional parameters IDENTIFICATION and CONNECTED.
1529 IDENTIFICATION specifies which part of the remote identifier has to be
1530 returned. With CONNECTED passed non-nil, it is checked whether a
1531 remote connection has been established already.
1533 ** The new macro `declare-function' suppresses compiler warnings about
1534 undefined functions.
1536 ** Changes to interactive function handling
1538 *** The new interactive spec code ^ says to first call
1539 handle-shift-selection if shift-select-mode is non-nil, before reading
1540 the command arguments. This is used for shift-selection (see above).
1542 *** Built-in functions can now have an interactive specification that
1543 is not a prompt string. If the `intspec' parameter of a `DEFUN'
1544 starts with a `(', the string is evaluated as a Lisp form.
1546 *** The interactive-form of a function can be added post-facto via the
1547 `interactive-form' symbol property. Mostly useful to add complex
1548 interactive forms to subroutines.
1552 *** Commands should use `use-region-p' to test whether there is
1553 an active region that they should operate on.
1555 *** `region-active-p' returns non-nil when Transient Mark mode is
1556 enabled and the mark is active. Most commands that act specially on
1557 the active region in Transient Mark mode should use `use-region-p'
1558 instead of `region-active-p', because `use-region-p' obeys the new
1559 user option `use-empty-active-region' (see Editing Changes, above).
1561 *** If a command sets `transient-mark-mode' to (only . OLDVAL), that
1562 means to activate transient-mark-mode temporarily, until the next
1563 unshifted point motion command or mark deactivation. Afterwards,
1564 reset transient-mark-mode to the value OLDVAL. The values `only' and
1565 `identity', introduced in Emacs 22, are now deprecated.
1567 ** Emacs session information
1569 *** The new variables `before-init-time' and `after-init-time' record the
1570 value of `current-time' before and after Emacs loads the init files.
1572 *** The new function `emacs-uptime' returns the uptime of an Emacs instance.
1574 *** The new function `emacs-init-time' returns the duration of the
1575 Emacs initialization.
1577 ** Changes affecting display-buffer
1579 *** display-buffer tries to be smarter when splitting windows.
1580 The new option split-window-preferred-function lets you specify your own
1581 function to pop up new windows. Its default value split-window-sensibly
1582 can split a window either vertically or horizontally, whichever seems
1583 more suitable in the current configuration. You can tune the behavior
1584 of split-window-sensibly by customizing split-height-threshold and the
1585 new option split-width-threshold. Both options now take the value nil
1586 to inhibit splitting in one direction. Setting split-width-threshold to
1587 nil inhibits horizontal splitting and gets you the behavior of Emacs 22
1588 in this respect. In any case, display-buffer may now split the largest
1589 window vertically even when it is not as wide as the containing frame.
1591 *** If pop-up-frames has the value `graphic-only', display-buffer only
1592 makes a separate frame on graphic displays.
1594 *** select-frame and set-frame-selected-window have a new optional
1595 argument NORECORD. If non-nil, this will avoid messing with the order
1596 of recently selected windows and the buffer list.
1598 ** Window parameters can now be defined.
1599 These are analogous to frame parameters, but are associated with
1602 *** The new functions window-parameters, window-parameter, and
1603 set-window-parameter are used to query and set window parameters.
1605 ** Minibuffer and completion changes
1607 *** A list of default values can be specified for the DEFAULT argument of
1608 functions `read-from-minibuffer', `read-string', `read-command',
1609 `read-variable', `read-buffer', `completing-read'. Elements of this list
1610 are available for inserting into the minibuffer by typing `M-n'.
1611 For empty input these functions return the first element of this list.
1613 *** New function `read-regexp' uses the regexp history and some useful
1614 regexp defaults (string at point, last Isearch/replacement regexp/string)
1615 via M-n when reading a regexp in the minibuffer.
1617 *** minibuffer-local-must-match-filename-map is now named
1618 minibuffer-local-filename-must-match-map.
1620 *** The `require-match' argument to `completing-read' accepts the new
1621 values `confirm-only' and `confirm-after-completion'.
1623 ** Search and replacement changes
1625 *** The regexp form \(?<num>:<regexp>\) specifies the group number explicitly.
1627 *** New function `match-substitute-replacement' returns the result of
1628 `replace-match' without actually using it in the buffer.
1630 *** The new variable `replace-search-function' determines the function
1631 to use for searching in query-replace and replace-string. The
1632 function it specifies is called by `perform-replace' when its 4th
1635 *** The new variable `replace-re-search-function' determines the
1636 function to use for searching in `query-replace-regexp',
1637 `replace-regexp', `query-replace-regexp-eval', and
1638 `map-query-replace-regexp'. The function it specifies is called by
1639 `perform-replace' when its 4th argument is non-nil.
1641 *** New keymap `search-map' bound to `M-s' provides global bindings
1642 for search related commands.
1644 *** New keymap `multi-query-replace-map' contains additonal keys bound
1645 to `automatic-all' and `exit-current' for multi-buffer interactive replacement.
1647 *** The variable `inhibit-changing-match-data', if non-nil, prevents
1648 the search and match primitives from changing the match data.
1650 *** New functions `word-search-forward-lax' and `word-search-backward-lax'.
1651 These are like `word-search-forward and `word-search-backward', except
1652 that the end of the search string need not match a word boundary,
1653 unless it ends in whitespace.
1655 ** File handling changes
1657 *** set-file-modes is now interactive and can take the mode value in
1658 symbolic notation thanks to auxiliary functions.
1660 *** file-local-variables-alist stores an alist of file-local
1661 variables defined in the current buffer.
1665 *** Each face can be remapped to a different face definition using the
1666 variable `face-remapping-alist'. This is an alist that maps faces to
1667 replacement definitions (which can be face names, lists of face names,
1668 or attribute/value plists. If this variable is buffer-local, the
1669 remapping occurs only in that buffer.
1671 *** text-scale-mode remaps the default face to a larger or smaller
1672 size in the current buffer. This feature is used by the Buffer Face
1673 menu and the new `C-x C-+', `C-x C--', and `C-x C-0' commands (see
1674 Editing Changes, above).
1678 **** `face-remap-add-relative' adds a face remapping entry to the
1681 **** ``face-remap-remove-relative' removes a face remapping entry from
1684 **** `face-remap-reset-base' restores a face to its global definition.
1686 **** `face-remap-set-base' sets the base remapping of a face.
1690 *** The new function `start-file-process' is similar to `start-process',
1691 but obeys file handlers. The file handler is chosen based on
1692 `default-directory'. The functions `start-file-process-shell-command'
1693 and `process-file-shell-command' are also new; they call internally
1694 `start-file-process' and `process-file', respectively.
1696 *** The new function `process-lines' executes an external program and
1697 returns its output as a list of lines.
1699 ** Character code, representation, and charset changes.
1701 *** In multibyte buffers and strings, characters are represented by
1702 UTF-8 byte sequences. The character code space is now 0x0..0x3FFFFF
1703 with no gap; code points 0x0..0x10FFFF are Unicode characters of the
1704 same code points, while code points 0x3FFF80..0x3FFFFF are raw 8-bit
1707 *** Generic characters no longer exist.
1709 *** The concept of a charset has changed. A single character may
1710 belong to multiple charsets (e.g. a-grave, U+00E0, belongs to charsets
1711 unicode, iso-8859-1, iso-8859-3, etc).
1713 **** The dimension of a charset is now 1, 2, 3, or 4, and the size of
1714 each dimension is no longer limited to 94 or 96.
1716 **** A dynamic charset priority list is used to infer the charset of
1717 characters for display.
1719 *** The functions `split-char' and `make-char' now accept up to 4
1720 positional codes instead of just 2.
1722 *** The functions `encode-char' and `decode-char' now accept any character sets.
1724 *** The function `define-charset' now accepts a completely different
1725 form of arguments (old-style arguments still work).
1727 *** The value of the function `char-charset' depends on the current
1728 priorities of charsets.
1730 *** The function get-char-code-property now accepts many Unicode base
1731 character properties. They are `name', `general-category',
1732 `canonical-combining-class', `bidi-class', `decomposition',
1733 `decimal-digit-value', `digit-value', `numeric-value', `mirrored',
1734 `old-name', `iso-10646-comment', `uppercase', `lowercase', and
1737 *** The functions `modify-syntax-entry' and `modify-category-entry' now
1738 accept a cons of characters as the first argument, and modify all
1739 entries in that range of characters.
1741 *** Use of `translation-table-for-input' for character code unification
1742 is now obsolete, since Emacs 23.1 and later uses Unicode as basis for
1743 internal representation of characters.
1747 **** `characterp' returns t if and only if the argument is a character.
1748 This replaces `char-valid-p', which is now obsolete.
1750 **** `max-char' returns the maximum character code (currently #x3FFFFF).
1752 **** `define-charset-alias' defines an alias of a charset.
1754 **** `set-charset-priority' sets priorities of charsets.
1756 **** `charset-priority-list' returns a prioritized list of charsets.
1758 **** `unibyte-string' makes a unibyte string from bytes.
1760 **** `define-char-code-property' defines a character code property.
1762 **** `char-code-property-description' returns the description string of
1763 a character code property.
1767 **** `find-word-boundary-function-table' is a char-table of functions to
1768 search for a word boundary.
1770 **** `char-script-table' is a char-table of script names.
1772 **** `char-width-table' is a char-table of character widths.
1774 **** `print-charset-text-property' controls how to handle `charset' text
1775 property on printing a string.
1777 **** `printable-chars' is a char-table of printable characters.
1779 ** Code conversion changes
1781 *** The new function `define-coding-system' should be used to define a
1782 coding system instead of `make-coding-system' (which is now obsolete).
1784 *** The functions `encode-coding-region' and `decode-coding-region'
1785 have an optional 4th argument to specify where the result of
1786 conversion should go.
1788 *** The functions `encode-coding-string' and `decode-coding-string'
1789 have an optional 4th argument specifying a buffer to store the result
1792 *** The new variable `inhibit-null-byte-detection' controls whether to
1793 consider text with null bytes as binary data. By default, it is
1794 `nil', and Emacs uses `no-conversion' for any text containing null
1797 *** The functions `set-coding-priority' and `make-coding-system' are obsolete.
1801 **** `with-coding-priority' executes Lisp code using the specified
1802 coding system priority order.
1804 **** `check-coding-systems-region' checks if the text in the region is
1805 encodable by the specified coding systems.
1807 **** `coding-system-aliases' returns a list of aliases of a coding system.
1809 **** `coding-system-charset-list' returns a list of charsets supported
1812 **** `coding-system-priority-list' returns a list of coding systems
1813 ordered by their priorities.
1815 **** `set-coding-system-priority' sets priorities of coding systems.
1817 **** `coding-system-from-name' returns a coding system matching with
1821 ** There is a new input method, Robin, different from Quail.
1822 It has three functionalities:
1823 i) a simple input method (converts an ASCII sequence into a string).
1824 ii) converts an existing buffer substring into another string
1825 iii) reverse conversion (each character produced by a
1826 robin rule can hold the original ASCII sequence as a char-code-property)
1828 *** The new function `robin-define-package' defines a Robin package.
1830 *** The new function `robin-modify-package' modifies an existing Robin package.
1832 *** The new function `robin-use-package' starts using a Robin package
1835 *** The new function `string-to-unibyte' is like `string-as-unibyte'
1836 but signals an error if STRING contains a non-ASCII, non-eight-bit
1839 ** Changes related to the new font backend
1841 *** Which font backends to use can be specified by the X resource
1842 "FontBackend". For instance, to use both X core fonts and Xft fonts:
1844 Emacs.FontBackend: x,xft
1846 If this resource is not set, Emacs tries to use all font backends
1847 available on your graphic device.
1849 *** New frame parameter `font-backend' specifies a list of
1850 font-backends supported by the frame's graphic device. On X, they are
1851 currently `x' and `xft'.
1853 *** The function `set-fontset-font' now accepts a script name as the
1854 second argument, and has an optional 5th argument to control how to
1859 **** `fontp' checks if the argument is a font-spec or font-entity.
1861 **** `font-spec' creates a new font-spec object.
1863 **** `font-get' returns a font property value.
1865 **** `font-put' sets a font property value.
1867 **** `font-face-attributes' returns a plist of face attributes set by a font.
1869 **** `list-fonts' returns a list of font-entities matching a font spec.
1871 **** `find-font' returns the font-entity best matching the given font spec.
1873 **** `font-family-list' returns a list of family names of available fonts.
1875 **** `font-xlfd-name' returns an XLFD name of a given font spec, font
1876 entity, or font object.
1878 **** `clear-font-cache' clears all font caches.
1880 ** Changes related to multiple-terminal (multi-tty) support
1882 *** $TERM is now set to `dumb' for subprocesses. If you want to know the
1883 $TERM inherited by Emacs you will have to look inside initial-environment.
1885 *** $DISPLAY is now dynamically inherited from the frame's `display'.
1887 *** The `window-system' variable is now frame-local. The new
1888 `initial-window-system' variable contains the `window-system' value
1889 for the first frame. `window-system' is also now a function that
1890 takes a frame argument.
1892 *** The `keyboard-translate-table' variable and the terminal and
1893 keyboard coding systems are now terminal-local.
1895 *** You can specify a terminal device (`tty' parameter) and a terminal
1896 type (`tty-type' parameter) to `make-terminal-frame'.
1898 *** The function `make-frame-on-display' now works during a tty
1901 *** A new `terminal' data type.
1902 The functions `get-device-terminal', `terminal-parameters',
1903 `terminal-parameter', `set-terminal-parameter' use this data type.
1905 *** Function key sequences are now mapped using `local-function-key-map',
1906 a new variable. This inherits from the global variable function-key-map,
1907 which is not used directly any more.
1911 **** before-hack-local-variables-hook is called after setting new
1912 variable file-local-variables-alist, and before actually applying the
1913 file-local variables.
1915 **** `suspend-tty-functions' and `resume-tty-functions' are called
1916 after a tty frame has been suspended or resumed, respectively. The
1917 functions are called with the terminal id of the frame being
1918 suspended/resumed as a parameter.
1920 **** The special hook `delete-terminal-functions' is called before
1921 deleting a terminal.
1925 **** `delete-terminal'
1931 *** `initial-environment' holds the environment inherited from Emacs's parent.
1933 ** Redisplay changes
1935 *** For underlined characters, the distance between the underline and
1936 the baseline is controlled by a new variable, `underline-minimum-offset'.
1938 *** You can now pass the value of the `invisible' property to
1939 invisible-p to check whether it would cause the text to be invisible.
1940 This is convenient when checking invisibility of text with no buffer
1941 position (e.g. in before/after-strings).
1943 *** `clear-image-cache' can be told to flush only images of a specific file.
1945 *** `vertical-motion' can now be given a goal column.
1946 It now accepts a cons cell (COLS . LINES) in its first argument, which
1947 says to stop, where possible, at a pixel x-position equal to COLS
1948 times the default column width.
1950 *** redisplay-end-trigger-functions, set-window-redisplay-end-trigger,
1951 and window-redisplay-end-trigger are obsolete. Use `jit-lock-register'
1954 *** The new variables `wrap-prefix' and `line-prefix' specify display
1955 specs which are appended at display-time to every continuation line
1956 and non-continuation line, respectively. In addition, Emacs
1957 recognizes the `wrap-prefix' and `line-prefix' text or overlay
1958 properties; these have the same effects as the variables of the same
1959 name, but take precedence.
1961 ** The Lisp interpreter now treats non-breaking space as whitespace.
1963 ** Miscellaneous new functions
1965 *** `apply-partially' performs a "curried" application of a function.
1967 *** `buffer-swap-text' swaps text between two buffers. This can be
1968 useful for modes such as tar-mode, archive-mode, RMAIL.
1970 *** `combine-and-quote-strings' produces a single string from a list of strings
1971 sticking a separator string in between each pair, and quoting those
1972 strings that include the separator as their substring. Useful for
1973 consing shell command lines from the individual arguments.
1975 *** `custom-note-var-changed' tells Custom to treat the change in a
1976 certain variable as having been made within Custom.
1978 *** `face-all-attributes' returns an alist describing all the basic
1979 attributes of a given face.
1981 *** `format-seconds' converts a number of seconds into a readable
1982 string of days, hours, etc.
1984 *** `image-refresh' refreshes all images associated with a given image
1987 *** `locate-user-emacs-file' helps packages to select the appropriate
1988 place to save user-specific files. It defaults to `user-emacs-directory'
1989 unless the file already exists at $HOME.
1991 *** `read-color' reads a color name using the minibuffer.
1993 *** `read-shell-command' does what its name says, with completion. It
1994 uses the minibuffer-local-shell-command-map for that.
1996 *** `split-string-and-unquote' splits a string into a list of substrings
1997 on the boundaries of a given delimiter, and unquotes the substrings that
1998 are quoted. Useful for taking apart shell commands.
2000 *** The two new functions `looking-at-p' and `string-match-p' can do
2001 the same matching as `looking-at' and `string-match' without changing
2004 *** The two new functions `make-serial-process' and
2005 `serial-process-configure' provide a Lisp interface to the new serial
2006 port support (see Emacs changes, above).
2008 ** Miscellaneous new variables
2010 *** `auto-save-include-big-deletions', if non-nil, means auto-save is
2011 not turned off automatically after a big deletion.
2013 *** `read-circle', if nil, disables the reading of recursive Lisp
2014 structures using the #N= and #N# syntax.
2016 *** `this-command-keys-shift-translated' is non-nil if the key
2017 sequence invoking the current command was found by shift-translation.
2019 *** `window-point-insertion-type' determines the insertion-type of the
2020 marker used for window-point.
2022 *** bookmark provides `bookmark-make-record-function' so special major
2023 modes like Info can teach bookmark.el how to save and restore the
2026 *** `fill-forward-paragraph-function' specifies which function the
2027 filling code should use to find paragraph boundaries.
2030 * New Packages for Lisp Programming in Emacs 23.1
2032 ** The new package avl-tree.el deals with the AVL tree data structure.
2034 ** The new package check-declare.el verifies the accuracy of
2035 declare-function macros (see Lisp Changes, above).
2037 ** find-cmd.el can build `find' commands using lisp syntax.
2039 ** The package misearch.el has been added. It allows Isearch to search
2040 through multiple buffers. A variable `multi-isearch-next-buffer-function'
2041 defines the function to call to get the next buffer to search in the series
2042 of multiple buffers. Top-level commands `multi-isearch-buffers',
2043 `multi-isearch-buffers-regexp', `multi-isearch-files' and
2044 `multi-isearch-files-regexp' accept a single argument that specifies
2045 a list of buffers/files to search for a string/regexp.
2047 ** The new major mode `special-mode' is intended as a parent for
2048 major modes such as those that set the "'mode-class 'special" property.
2051 ----------------------------------------------------------------------
2052 This file is part of GNU Emacs.
2054 GNU Emacs is free software: you can redistribute it and/or modify
2055 it under the terms of the GNU General Public License as published by
2056 the Free Software Foundation, either version 3 of the License, or
2057 (at your option) any later version.
2059 GNU Emacs is distributed in the hope that it will be useful,
2060 but WITHOUT ANY WARRANTY; without even the implied warranty of
2061 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2062 GNU General Public License for more details.
2064 You should have received a copy of the GNU General Public License
2065 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2070 paragraph-separate: "[
\f]*$"
2073 arch-tag: e759449d-88b3-4de4-9900-3a6c3dfa23e2