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*.
228 ** Face aliases can now be marked as obsolete, using the macro
229 `define-obsolete-face-alias'.
232 * Installation Changes in Emacs 23.1
234 ** The default X toolkit is now Gtk+, rather than Lucid.
235 The configure option `--with-gtk' has been removed. Gtk is now the
236 default toolkit, but you can use --with-x-toolkit=gtk if necessary.
239 Fonts are handled by new code capable of dealing with multiple font
240 backends. This uses the freetype and fontconfig libraries.
242 *** Emacs now accepts font names supplied in the fontconfig format
243 (e.g. "monospace-12:bold") and GTK format (e.g. "Monospace Bold 12").
245 *** Added support for local fonts (fonts installed on the machine
246 where Emacs is running).
248 *** Added support for the Xft library for antialiasing.
250 *** Added support for the otf library for complex text layout by
253 *** Added support for the m17n library for text shaping.
255 ** Changes to image support
257 *** configure now checks for libgif before libungif when searching for
260 *** Emacs now supports the SVG image format through librsvg2.
262 *** Emacs now supports multi-page TIFF images.
264 ** New NeXTSTEP-based port
265 This provides support for GNUstep (via the GNUstep libraries) and Mac
266 OS X (via the Cocoa libraries).
268 Specify --with-ns to configure for this. By default, a self-contained
269 app will be built (containing all lisp). To install/share lisp with
270 other emacsen (e.g. X11 build) use --disable-ns-self-contained. See
271 nextstep/README and nextstep/INSTALL in the Emacs source directory.
273 ** Mac OS X is no longer supported via Carbon.
274 Use the NeXTSTEP port, described above.
276 ** The new configuration option "--with-dbus" enables D-Bus language
279 ** Support for many obsolete platforms has been removed.
280 See the list at the end of etc/MACHINES for details.
282 *** Support for systems without alloca has been removed.
284 *** Support for Sun windows has been removed.
286 *** The `emacstool' utility has been removed.
288 ** The following platforms will be removed in a future Emacs version:
289 If you are still using Emacs on one of these platforms, please email
290 emacs-devel@gnu.org to inform the Emacs developers.
292 *** Old GNU/Linux systems based on libc version 5.
294 *** Old FreeBSD, NetBSD, and OpenBSD systems based on the COFF
297 *** Solaris versions 2.6 and below.
299 *** Solaris on IBM RS6000 machines.
301 *** UNIX System V (the original SysV, not later platforms based on it).
303 *** Unixware on non-x86 machines.
305 *** Platforms not supporting shared libraries (i.e., requiring the
306 NO_SHARED_LIBS compilation flag).
308 ** The configure options `--with-gcc', `--without-gcc' have been removed.
309 Configure will use gcc by default. Set the CC environment variable if
310 you need control over which C compiler is used.
312 ** The refcards are now shipped as PDF files.
314 ** The manuals are now licensed under the GNU Free Documentation License v1.3,
315 or any later version.
317 ** Emacs 23 comes with a new set of default icons.
318 Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png.
319 The Emacs 22 icon is available as `emacs22.png' in the same location.
321 * Changes in Emacs 23.1
323 ** Improved X Window System support
325 *** Emacs now supports using both X displays and ttys in one session.
326 With an Emacs server active (M-x server-start), `emacsclient -t'
327 creates a tty frame connected to the running emacs server. You can
328 use any number of different ttys. `emacsclient -c' creates a new X11
329 frame on the current $DISPLAY (or a tty frame if $DISPLAY is not set).
330 There may be problems if a display exits unexpectedly and Emacs is compiled
331 with Gtk+, see etc/PROBLEMS.
333 You can test for the presence of this feature in your Lisp code by
334 testing for the `multi-tty' feature.
336 *** Emacs starts in the background, as a daemon, when given the
337 --daemon command line argument. It disconnects from the terminal and
338 starts the server. Clients can connect and create graphical or
339 terminal frames using emacsclient.
341 **** emacsclient starts emacs in daemon mode and connects to it when
342 --alternate-editor="" is used (or when the evironment variable
343 ALTERNATE_EDITOR is set to "") and emacsclient cannot connect to an
346 *** The new command close-display-connection closes a connection to a
347 remote display. There are some bugs for Gtk+. See etc/PROBLEMS.
349 *** Emacs now supports the XEmbed specification.
350 You can embed Emacs in another application on X11. The new command line
351 option --parent-id is used to pass the parent window id to Emacs. See
352 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
353 for details about XEmbed.
355 *** Emacs can now set the frame opacity.
356 The opacity of a frame can be controlled by setting the `alpha' frame
357 parameter. This only takes effect on a compositing window manager for
358 the X Window System, such as Compiz, Beryl and Compiz Fusion, on Mac
359 OS X, or on Windows 2000 and later versions of Windows.
361 The alpha parameter should be an integer between 0 (transparent) and
362 100 (opaque), or a float number between 0.0 and 1.0. It can also be a
363 cons cell (ACTIVE . INACTIVE), where ACTIVE is the opacity of an
364 active frame and INACTIVE is the opacity of non-active frames.
366 The variable `frame-alpha-lower-limit' defines a lower bound for the
367 opacity; the default is 20.
369 ** Internationalization changes
371 *** The Emacs character set is now a superset of Unicode.
372 (It has about four times the code space, which should be plenty).
374 The internal encoding used for buffers and strings is now
375 Unicode-based and called `utf-8-emacs' (`emacs-internal' is an alias
376 for this). This encoding is backward-compatible with Unicode's UTF-8
377 encoding. The internal encoding previously used by Emacs,
378 `emacs-mule', is still available for reading and writing files.
380 During byte-compilation, Emacs 23 uses `utf-8-emacs' to write files.
381 As a result, byte-compiled files containing non-ASCII characters can't
382 be read by earlier versions of Emacs. Files compiled by Emacs 20, 21,
383 or 22 are loaded correctly as `emacs-mule' (whether or not they
384 contain multibyte characters). This takes somewhat more time, so it
385 may be worth recompiling existing .elc files which don't need to be
386 shared with older Emacsen.
388 *** There are new coding systems/aliases; see M-x list-coding-systems.
390 *** There is a new charset implementation with many new charsets.
391 See M-x list-character-sets. New charsets can be defined conveniently
392 as tables of unicodes.
394 *** There are new language environments for Chinese-GBK,
395 Chinese-GB18030, Khmer, Bengali, Punjabi, Gujarati, Oriya, Telugu,
396 Sinhala, and TaiViet.
398 *** The minor modes unify-8859-on-encoding-mode and
399 unify-8859-on-decoding-mode are obsolete.
401 *** `ucs-insert' is bound to `C-x 8 RET' and in addition to hex numbers
402 accepts numbers in hash notation (e.g. #o21430 for octal, or #10r8984 for
403 decimal). It also accepts Unicode character names with completion.
405 *** The `cyrillic-translit' input method supports many new characters.
406 Common typographical characters available from Unicode were added to
407 `cyrillic-translit': punctuation marks, accented characters, fractions,
410 ** Emacs now supports serial port access on GNU/Linux, Unix, and
411 Windows. The new command `serial-term' starts an interactive terminal
412 on a serial port. The serial port can be configured at runtime with
413 the mode-line mouse menu.
417 *** In the Options menu, the "Set Default Font" item applies the
418 selected font to the `default' face on all frames, not just the
419 current frame. Furthermore, if Emacs is compiled with both GTK and
420 Fontconfig support, the "Set Default Font" item uses the GTK font
421 selection dialog instead of an Emacs pop-up menu.
423 *** The font setting chosen by "Set Default Font" is saved if the
424 "Save Options" item is used.
426 *** The Tools menu contains a new Encryption/Decryption submenu.
427 This contains commands provided by EasyPG, the newly-included
428 interface to GnuPG (see New Modes and Packages).
430 *** In the Options menu, the "Truncate Long Lines in the Buffer" entry
431 has been replaced with a submenu offering three different ways to
432 handle long lines: truncation, continuation at the window edge, and
433 the new word wrapping behavior (see Editing Changes, below).
435 *** Improvements to menus for major and minor modes
436 More major and minor modes now have a mode specific menu, and existing
437 mode menus have been improved to include more functionality.
441 *** The mode-line displays a `@', instead of `-', if the
442 default-directory for the current buffer is on a remote machine.
444 *** The mode-line displays a mode menu when mouse-1 is clicked on a
445 minor mode, in the same way as it already did for major modes.
447 *** The `mode-line-emphasis' face is used to highlight certain
448 mode-line information (e.g. waiting for a VC command to finish).
450 *** The mode-line tooltips have been improved to provide more details.
452 *** The VC, line/colum number and minor mode indicators on the mode
453 line are now interactive: mouse-1 can be used on them to pop up a menu.
455 ** File deletion can make use of the Recycle Bin or system Trash folder.
456 Set `delete-by-moving-to-trash' non-nil to use this. Deleted files
457 and directories will then be sent to the Recycle Bin on Windows, and
458 to `trash-directory' on other systems.
460 ** Directory-local variables can now be defined.
461 By default, Emacs looks in .dir-locals.el for directory-local
462 variables. For more information, see `dir-locals-set-directory-class'
463 and `dir-locals-set-class-variables'.
465 ** Emacs can now use `auth-source' for authentication.
466 `smtpmail' and `url' (Tramp and Gnus also) use `auth-source' to obtain
467 login names and passwords. The match, if found, is reported
468 in *Messages* with the password blanked out.
470 ** `where-is-preferred-modifier' can specify your favorite modifier.
473 * Startup Changes in Emacs 23.1
475 ** The option `inhibit-startup-screen' (with aliases to old names
476 `inhibit-splash-screen' and `inhibit-startup-message') doesn't inhibit
477 display of the initial message in the *scratch* buffer. If you don't
478 want to display the initial message in the *scratch* buffer at startup,
479 you can set the option `initial-scratch-message' to nil.
481 ** New user option `initial-buffer-choice' specifies what to display
482 after starting Emacs: startup screen, *scratch* buffer, visiting a
485 ** New alias `argv' for `command-line-args-left'
486 This is a convenience alias, so that one can write `(pop argv)'
487 inside of --eval command line arguments in order to access
490 ** The abbrev file is no longer read at startup in batch mode.
492 ** Emacs now supports invocation by an X session manager.
493 It can save a session and restore it later. See the documentation of
494 the functions `emacs-session-save' and `emacs-session-restore'.
495 (Actually, this feature was introduced with Emacs 22, but it was not
498 * Incompatible Editing Changes in Emacs 23.1
500 ** In Dired, `dired-flag-garbage-files' is rebound from `&' to `%&'
501 on the regexp command prefix map.
503 ** In Dired-x, all command guesses for ! are now added to the default
504 list accessible by M-n instead of pushing all guesses temporarily into
507 ** In Isearch mode, a special case of typing `C-w' at the beginning of
508 the minibuffer that toggles word search (i.e. using key sequences
509 `C-s RET C-w' or `C-s M-e C-w') is obsolete. You can use the global key
510 `M-s w' to start word search, or type `M-s w' in Isearch mode to
511 toggle word search. To start nonincremental word search you can now use
512 `M-s w RET' and `M-s w C-r RET' instead of `C-s RET C-w' and `C-r RET C-w'.
514 ** In Info, `Info-search' is unbound from `M-s' to allow using `M-s w'
515 for word search as well as other search commands from the global prefix
516 key `M-s'. `Info-search' is still bound to `s', and also incremental
517 search commands `C-s', `C-M-s', `C-r', `C-M-r' are available for searching
518 through multiple Info nodes, together with their nonincremental versions
519 `C-s RET', `C-r RET', `C-M-s RET', `C-M-r RET', `M-s w RET'.
521 ** In Text mode, `center-line' and `center-paragraph' are rebound from
522 `M-s' and `M-S' to global keys `M-o M-s' and `M-o M-S' on the global
523 prefix map `M-o', which is intended for such formatting commands.
525 ** The following input methods were removed in Emacs 22.2, but this was
526 not advertised: danish-alt-postfix, esperanto-alt-postfix,
527 finnish-alt-postfix, german-alt-postfix, icelandic-alt-postfix,
528 norwegian-alt-postfix, scandinavian-alt-postfix, spanish-alt-postfix,
529 and swedish-alt-postfix. Use the versions without "alt-", which are
533 * Editing Changes in Emacs 23.1
535 ** The C-n and C-p line-motion commands now move by screen lines,
536 taking continued lines and variable-width characters into account.
537 Setting `line-move-visual' to nil reverts this to the previous
538 behavior (i.e., motion by logical lines based on buffer contents
541 ** C-x C-c now invokes `save-buffers-kill-terminal', and C-z now
542 invokes `suspend-frame'. These changes are for compatibility with the
543 new multi-tty support (see `Improved X Window System support' above).
547 *** Transient Mark mode is now on by default.
549 *** mark-even-if-inactive now defaults to t
551 *** When Transient Mark mode is on, C-SPC C-SPC pushes a mark without
554 *** When Transient Mark mode is on, M-q now fills the region if the
555 region is active. Otherwise, it fills the current paragraph.
557 *** When Transient Mark mode is on, M-$ now checks spelling of the
558 region if the region is active. Otherwise, it checks spelling of the
561 *** When Transient Mark mode is on, TAB now indents the region if the
564 *** The variable `use-empty-active-region' controls whether an empty
565 active region in Transient Mark mode should make commands operate on
568 ** Temporarily active regions
570 *** The new variable shift-select-mode, non-nil by default, controls
571 shift-selection. When Shift Select mode is on, shift-translated
572 motion keys (e.g. S-left and S-down) activate and extend a temporary
573 region, similar to mouse-selection.
575 *** Temporarily active regions, created using shift-selection or
576 mouse-selection, are not necessarily deactivated in the next command.
577 They are only deactivated after point motion commands that are not
578 shift-translated, or after commands that would ordinarily deactivate
579 the mark in Transient Mark mode (e.g., any command that modifies the
582 ** Minibuffer and completion changes
584 *** Emacs may ask for confirmation before opening a non-existent file
585 or buffer. By default, Emacs requests confirmation if you type RET
586 immediately after TAB, and the resulting input is not an existing file
587 or buffer; this usually happens when the minibuffer input did not
588 complete far enough and you entered RET by mistake. In that case,
589 Emacs puts the message "[Confirm]" in the minibuffer; type RET again
590 to create the file or buffer.
592 The new variable confirm-nonexistent-file-or-buffer determines whether
593 Emacs asks for confirmation. The default value is `after-completion'.
594 If you change it to t, Emacs always asks for confirmation; if you
595 change it to nil, Emacs never asks for confirmation.
597 *** The rules for performing completion have been changed.
598 When generating completion alternatives, Emacs now takes the
599 minibuffer text after point, if any, into account: this text is
600 treated as a substring of the remaining part of the completion
601 alternative (i.e., the part not matched by the minibuffer text before
602 point). If no completion alternatives are found this way, Emacs
603 attempts to perform partial-completion. If still no completion
604 alternatives are found, we fall back on the Emacs 22 rules for
605 performing completion.
607 The new variable `completion-styles' can be customized to choose your
608 favorite completion style.
610 *** When M-n in the minibuffer reaches the end of the list of defaults,
611 it adds the completion list to the end, so next M-n continues putting
612 completion items to the minibuffer. The same principle applies to
613 incremental search commands as well: C-s or C-M-s starts searching
614 the default values and after the end of defaults they continue
615 searching minibuffer completion items.
617 *** Minibuffer input of shell commands now comes with completion.
619 *** In the `C-x d' (Dired) prompt, typing M-n gives the visited file
620 name of the current buffer.
622 *** In the M-! (shell-command) prompt, M-n provides some default commands.
623 These are guessed using the file extension of the current file, based
624 on the file-handlers specified in the operating system's `mailcap'
625 file. The ! command in Dired (dired-do-shell-command) works
626 similarly, using the file displayed on the current line.
628 *** A list of regexp default values is available via M-n for `occur',
629 `keep-lines', `flush-lines' and `how-many'. This list includes the active
630 region in transient-mark-mode, the word under the cursor, the last Isearch
631 regexp, the last Isearch string and the last replacement regexp.
633 *** When enable-recursive-minibuffers is non-nil, operations which use
634 switch-to-buffer (such as C-x b and C-x C-f) do not fail any more when
635 used in a minibuffer or a dedicated window. Instead, they fallback on
636 using pop-to-buffer, which will use some other window. This change
637 has no effect when enable-recursive-minibuffers is nil (the default).
639 *** Isearch started in the minibuffer searches in the minibuffer history.
640 Reverse Isearch commands (C-r, C-M-r) search in previous minibuffer
641 history elements, and forward Isearch commands (C-s, C-M-s) search in
642 next history elements. When the reverse search reaches the first history
643 element, it wraps to the last history element, and the forward search
644 wraps to the first history element. When the search is terminated, the
645 history element containing the search string becomes the current.
647 *** The variable read-file-name-completion-ignore-case overrides
648 completion-ignore-case for file name completion.
650 *** The variable read-buffer-completion-ignore-case overrides
651 completion-ignore-case for buffer name completion.
653 *** The new command `minibuffer-force-complete' chooses one of the
654 possible completions, rather than stopping at the common prefix.
656 *** If `completion-auto-help' is `lazy', Emacs shows the completions
657 buffer only on the second attempt to complete. This was already
658 supported in `partial-completion-mode'.
662 *** S-down-mouse-1 now pops up a menu for changing the font and text
663 size of the default face in the current buffer. The face is changed
664 via face remapping (see Lisp changes, below).
666 *** New commands to change the default face size in the current buffer.
667 To increase it, type `C-x C-+' or `C-x C-='. To decrease it, type
668 `C-x C--'. To restore the default (global) face size, type `C-x C-0'.
669 These work via Text Scale mode, a new minor mode.
671 The final key in the above commands may be repeated without the
672 leading `C-x', e.g. `C-x C-= C-= C-=' increases the face height by
673 three steps. Each step scales the height of the default face by the
674 value of the variable `text-scale-mode-step'.
676 *** The commands buffer-face-mode and buffer-face-set can be used to
677 remap the default face in the current buffer. See "Buffer Face mode",
678 under New Modes and Packages.
680 ** Primary selection changes
682 *** You can disable kill ring commands from accessing the primary
683 selection by setting `x-select-enable-primary' to nil.
685 ** Continuation lines can now be wrapped at word boundaries
686 (word-wrapping). This is controlled by the new per-buffer variable
687 `word-wrap'. Word wrapping does not take place if continuation lines
688 are not shown, e.g. if truncate-lines is non-nil. The most convenient
689 way to enable word-wrapping is using the new minor mode Visual Line
690 mode; in addition to setting `word-wrap' to t, this rebinds some
691 editing commands to work on screen lines rather than text lines. See
692 New Modes and Packages, below.
694 ** Window management changes
696 *** truncate-partial-width-windows now accepts integer values, which
697 specify a minimum window width for partial-width windows, below which
698 lines are truncated. The default has been changed to 50.
700 *** The new command balance-windows-area balances windows both
701 vertically and horizontally.
703 *** pop-to-buffer now always sets input focus when the popped-to window
704 is on a different frame.
706 ** Miscellaneous changes:
708 *** C-l is bound to the new command recenter-top-bottom, rather than recenter.
709 This moves the current line to window center, top and bottom on
710 successive invocations.
712 *** scroll-preserve-screen-position also preserves the column position.
714 *** If `yank-pop-change-selection' is t, rotating the kill ring also
715 updates the selection or clipboard to the current yank, just as M-w
716 would do so with the text it copies to the kill ring.
718 *** C-M-% now shows replacement as it would look in the buffer, with
719 `\N' and `\&' substituted according to the match. Old behavior can be
720 restored by customizing `query-replace-show-replacement'.
722 *** The command shell prompts for the default directory, when it is
723 called with a prefix and the default directory is a remote file name.
724 This is because some file name handlers (like ange-ftp) are not able to
725 run processes remotely.
727 *** The new command kill-matching-buffers kills buffers whose name
730 *** The value of comment-style now defaults to `indent'.
731 Thefore, comment-start markers are inserted at the current indentation
732 of the region to comment, rather than the leftmost column.
734 *** The new commands `pp-macroexpand-expression' and
735 `pp-macroexpand-last-sexp' pretty-print macro expansions.
737 *** The new command `set-file-modes' allows to set file's mode bits.
738 The mode bits can be specified in symbolic notation, like with GNU
739 Coreutils, in addition to an octal number. `chmod' is a new
740 convenience alias for this function.
742 *** `next-error-recenter' specifies how next-error should recenter the
743 visited source file. Its value can be a number (for example, 0 for
744 top line, -1 for bottom line), or nil for no recentering.
746 *** When typing in a password in the echo area, C-y yanks the current
747 kill into the password.
749 *** Tooltip frame parameters `font' and `color' in `tooltip-frame-parameters'
750 are ignored. Customize the `tooltip' face instead.
752 *** `mkdir' is a new convenience alias for `make-directory'.
754 * New Modes and Packages in Emacs 23.1
756 ** Auto Composition Mode is a minor mode that composes characters
757 automatically when they are displayed. It is globally on by default.
758 It uses `auto-composition-function' (default `auto-compose-chars').
760 ** Bubbles, a new game, is similar to SameGame.
762 ** Buffer Face mode is a minor mode for remapping the default face in
763 the current buffer. The variable `buffer-face-mode-face' specifies
764 the face to remap to. The command `buffer-face-set' prompts for a
765 face name, sets `buffer-face-mode-face' to it, and enables
766 buffer-face-mode. See "Face changes", under Editing Changes, for a
767 description of face remapping.
769 ** butterfly flips the desired bit on the drive platter.
770 See http://xkcd.com/378/
772 ** bug-reference.el provides clickable links to bug reports.
774 ** dbus.el provides D-Bus language bindings.
775 D-Bus is an inter-process communication mechanism for applications
776 residing on the same host. See the manual for details.
778 ** DocView mode allows viewing of PDF, PostScript and DVI documents.
779 One can also search for a regular expression in the document. For
780 details, see the commentary in doc-view.el.
782 PDF and DVI files are now opened in Doc View mode by default.
784 In Postcript mode, C-c C-c launches Doc View minor mode for viewing
787 ** EasyPG provides an interface to the GNU Privacy Guard (GnuPG).
788 It includes a GnuPG keyring browser, cryptographic operations on
789 regions and files, and automatic encryption of *.gpg files. For
790 details, see the EasyPG Assistant User's Manual.
792 ** json.el is a library for parsing and generating JSON
793 (JavaScript Object Notation), a lightweight data-interchange format.
795 ** linum.el is a new minor mode to display line numbers for the
798 ** mairix.el is an interface to mairix, a free tool for indexing and
799 searching locally stored mail. It allows you to query mairix and
800 display the search results with Rmail, Gnus and VM. Note that there
801 is an existing Gnus back end, nnmairix.el, which should be used with
804 ** minibuffer-depth-indicate-mode shows the minibuffer depth in the prompt.
807 This is a new mode for editing XML documents. It allows a schema to
808 be associated with the XML document being edited, using Relax NG as
809 the schema language. The schema is used to provide two key features:
811 *** Continuous validation. nXML validates as you type, highlighting
812 any invalid parts of your document.
814 *** Completion. nXML can assist you in entering an element name,
815 attribute name or data value by using information about what is
816 allowed by the schema in that context.
818 ** proced.el provides a Dired-like interface for operating on
819 processes. Proced makes an Emacs buffer containing a listing of the
820 current processes. You can use the normal Emacs commands to move
821 around in this buffer, and special Proced commands to operate on the
822 processes listed. It is currently only functional on GNU/Linux,
823 MS-Windows and Solaris.
825 ** Remember Mode is a mode for jotting down things to remember.
826 Notes can be saved to a Diary file. For details, see the Remember
829 ** RST mode is a major mode for editing reStructuredText files.
831 ** Ruby mode is a major mode for Ruby files.
833 ** Visual Line mode provides support for editing by visual lines.
834 It turns on word-wrapping in the current buffer, and rebinds C-a, C-e,
835 and C-k to commands that operate by visual lines instead of logical
836 lines. This is a more reliable replacement for longlines-mode.
837 This can also be turned on using the menu bar, via
838 Options -> Line Wrapping in this Buffer -> Word Wrap
840 ** xesam.el is an implementation of Xesam, an interface to (desktop)
841 search engines like Beagle, Strigi, and Tracker. The Xesam API
842 requires D-Bus for communication.
844 ** zeroconf.el offers service discovery and service publishing
845 interfaces according to the zeroconf specification. It communicates
846 with Avahi, a zeroconf implementation, via D-Bus messages on systems
847 which have installed this software.
849 ** There is a new `whitespace' package.
850 (The pre-existing one has been renamed to `old-whitespace'.)
851 Now, besides reporting bogus blanks, the whitespace package has a
852 minor mode and a global minor mode to visualize blanks (TAB, (HARD)
853 SPACE and NEWLINE). The visualization is made via faces and/or display
854 table. It can also indicate lines that extend beyond a given column,
855 trailing blanks, and empty lines at the start or end of a buffer.
856 See `whitespace-style' for more details. The `whitespace-action' option
857 specifies what to do when a buffer is visited, killed, or written.
860 * Changes in Specialized Modes and Packages in Emacs 23.1
862 ** Abbrev has been rewritten in Elisp and extended with more flexibility.
864 *** New functions: abbrev-get, abbrev-put, abbrev-table-get, abbrev-table-put,
865 abbrev-table-p, abbrev-insert, abbrev-table-menu.
867 *** Special hook `abbrev-expand-functions' obsoletes `pre-abbrev-expand-hook'.
869 *** `make-abbrev-table', `define-abbrev', `define-abbrev-table' all take
870 extra arguments for arbitrary properties.
872 *** New variable `abbrev-minor-mode-table-alist'.
874 *** `local-abbrev-table' can hold a list of abbrev-tables.
876 *** Abbrevs have now the following special properties:
877 `:count', `:system', `:enable-function', `:case-fixed'.
879 *** Abbrev-tables have now the following special properties:
880 `:parents', `:case-fixed', `:enable-function', `:regexp',
881 `abbrev-table-modiff'.
885 *** `apropos-library' describes the elements defined in a given library.
887 *** Set `apropos-compact-layout' is you want a more compact (but wider) layout.
889 ** Archive Mode has basic support to browse Rar archives.
890 Note, however, that the free version of the unrar command only handles
891 versions 1 and 2 of the Rar format.
895 *** New command `bibtex-initialize' (re)initializes BibTeX buffers.
897 *** New `bibtex-entry-format' options `whitespace', `braces', and
898 `string', disabled by default.
900 *** New variable `bibtex-cite-matcher-alist' contains rules to
901 identify cited keys in BibTeX entries, used by `bibtex-find-crossref'.
903 *** Command `bibtex-url' allows multiple URLs per entry.
905 ** Calendar and diary
907 *** There is a new date style, `iso', essentially year/month/day.
908 The variable `european-calendar-style' is obsolete - use `calendar-date-style'.
909 Similarly, the commands `american-calendar' and `european-calendar'
910 should be replaced by `calendar-set-date-style'.
912 *** The calendar namespace has been rationalized.
913 All functions and variables now begin with a `calendar-', `diary-', or
914 `holiday-' prefix. The various calendar systems have secondary
915 prefixes, eg `calendar-french-'. The old names you are likely to use
916 directly still exist, for the time being, as aliases, but please start
919 *** The whitespace in the calendar layout can be customized.
921 calendar-left-margin, calendar-intermonth-spacing, calendar-column-width,
922 calendar-day-header-width, and calendar-day-digit-width.
924 *** Text (e.g. ISO weeks) can be displayed between the calendar months.
925 See the variables calendar-intermonth-header and calendar-intermonth-text.
927 *** The function `holiday-chinese' computes holidays on the Chinese calendar.
928 It has been used to add items to the list `holiday-oriental-holidays'.
930 *** `diary-remind' accepts a negative number -DAYS as a shorthand for
931 the list (1 2 ... DAYS).
935 *** The new command C-c C-f (change-log-find-file) finds the file
936 associated with the current log entry.
938 *** The new command C-c C-c (change-log-goto-source) goes to the
939 source code associated with a log entry.
941 ** Compile and grep modes
943 *** The mode-line entry for the *compilation* and *grep* buffer is color coded.
944 It has different colors for to show that: (a) the command is still
945 running, (b) successful completion, (c) error.
947 *** compilation-auto-jump-to-first-error tells `compile' to jump to
948 the first error encountered during compilations.
950 *** compilation-scroll-output accepts a new value, `first-error', which
951 says to stop auto scrolling at the first error that occurs.
953 *** The `cc' alias for C++ files in `grep-file-aliases' has been
954 improved. `hh' can be used to match C++ header files and `cchh' both
955 C++ sources and headers.
959 *** You can specify your copyright holders' names.
960 Only copyright lines with holders matching `copyright-names-regexp' are
961 considered for update.
963 *** Copyrights can be at the end of the buffer.
964 This is controlled by `copyright-at-end-flag' (used by, e.g., change-log-mode).
968 *** defcustom accepts new keyword arguments, `:safe' and `:risky', which
969 set a variable's `safe-local-variable' and `risky-local-variable' property.
973 *** diff-refine-hunk highlights word-level details of changes in a diff hunk.
974 It's used automatically as you move through hunks, see
975 diff-auto-refine-mode. It is bound to `C-c C-b'.
977 *** diff-add-change-log-entries-other-window iterates through the diff
978 buffer and tries to create ChangeLog entries for each change.
979 It is bound to `C-x 4 A'.
981 *** Turning on `whitespace-mode' in a diff buffer will show trailing
982 whitespace problems in the modified lines.
986 *** In Dired, C-x C-q now runs the command wdired-change-to-wdired-mode,
987 and C-x C-q in wdired-mode exits it with asking a question about
990 *** `&' runs the command `dired-do-async-shell-command' that executes
991 the command asynchronously without the need to manually add ampersand
992 to the end of the command. Its output appears in the buffer `*Async Shell
995 *** `M-s f C-s' and `M-s f M-C-s' run Isearch that matches only at file names.
996 When a new user option `dired-isearch-filenames' is t, then even ordinary
997 Isearch started with `C-s' and `C-M-s' matches only at file names in the
998 Dired buffer. When `dired-isearch-filenames' is `dwim' then activation of
999 file name Isearch depends on the position of point - if point is on a file
1000 name initially, then Isearch matches only file names, otherwise it matches
1001 everywhere in the Dired buffer. You can toggle file names matching on or
1002 off by typing `M-s f' in Isearch mode.
1004 *** `M-s a C-s' and `M-s a M-C-s' run multi-file Isearch on the marked files.
1005 They visit the first marked file in the sequence and display the usual Isearch
1006 prompt for a string or a regexp where all Isearch commands are available.
1008 *** `Q' in Dired provides two new keys for multi-file replacement.
1009 The upper case key `Y' replaces all remaining matches in all remaining files
1010 with no more questions. The upper case key `N' stops doing replacements
1011 in the current file and skips to the next file. These multi-file keys
1012 are available for all commands that use `tags-query-replace'
1013 including `dired-do-query-replace-regexp', `vc-dir-query-replace-regexp',
1014 `reftex-query-replace-document'.
1018 *** The line length of fixed-form Fortran is not fixed at 72 any more.
1019 Customize the variable `fortran-line-length' to change it.
1021 *** In Fortran mode, M-; is now bound to the standard comment-dwim,
1022 rather than fortran-indent-comment.
1024 *** (The increasingly misnamed) F90 mode supports Fortran 2003 syntax.
1028 *** The Gnus package has been updated
1029 There are many news features, bug fixes and improvements; see the file
1030 GNUS-NEWS or the node "No Gnus" in the Gnus manual for details.
1032 *** In Emacs 23, Gnus uses Emacs' new internal coding system `utf-8-emacs' for
1033 saving articles drafts and ~/.newsrc.eld. These file may not be read
1034 correctly in Emacs 22 and below. If you want to Gnus across different Emacs
1035 versions, you may set `mm-auto-save-coding-system' to `emacs-mule'.
1037 *** Passwords are consistently loaded through `auth-source'
1038 Gnus can use `auth-source' for POP and IMAP passwords. Also see that
1039 `smtpmail' and `url' support `auth-source' for SMTP and HTTP/HTTPS/RSS
1040 authentication respectively.
1044 *** New macro `with-help-window' should set up help windows better
1045 than `with-output-to-temp-buffer' with `print-help-return-message'.
1047 *** New option `help-window-select' permits to customize whether help
1048 window shall be automatically selected when invoking help.
1050 *** New variable `help-window-point-marker' permits one to specify a new
1051 position for point in help window (for example in `view-lossage').
1055 *** New command `isearch-forward-word' bound globally to `M-s w' starts
1056 incremental word search. New command `isearch-toggle-word' bound to the
1057 same key `M-s w' in Isearch mode toggles word searching on or off
1058 while Isearch is active.
1060 *** New command `isearch-highlight-regexp' bound to `M-s h r' in Isearch
1061 mode runs `highlight-regexp' (`hi-lock-face-buffer') with the current
1062 search string as its regexp argument. The same key `M-s h r' and
1063 other keys on the `M-s h' prefix are bound globally to the command
1064 `highlight-regexp' and other hi-lock commands.
1066 *** New command `isearch-occur' bound to `M-s o' in Isearch mode
1067 runs `occur' with the current search string. The same key `M-s o'
1068 is bound globally to the command `occur'.
1070 *** Isearch can now search through multiple ChangeLog files.
1071 When running Isearch in a ChangeLog file, if the search fails,
1072 then another C-s tries searching the previous ChangeLog,
1073 if there is one (e.g. going from ChangeLog to ChangeLog.12).
1074 This is enabled if multi-isearch-search is non-nil.
1076 *** Two new commands to start Isearch on a list of marked buffers
1077 for buff-menu.el and ibuffer.el are bound to the keys `M-s a C-s' and
1080 *** The part of an Isearch that failed to match is highlighted in
1081 `isearch-fail' face.
1083 *** `C-h C-h' in Isearch mode displays isearch-specific Help screen,
1084 `C-h b' displays all Isearch key bindings, `C-h k' displays the full
1085 documentation of the given Isearch key sequence, `C-h m' displays
1086 documentation of Isearch mode. All the rest Help commands exit Isearch mode
1087 and execute their global definitions.
1089 *** When started in the minibuffer, Isearch searches in the minibuffer
1090 history. See `Minibuffer changes', above.
1094 *** Upgraded to MH-E version 8.2. See MH-E-NEWS for details.
1097 *** The file etc/emacs.py now supports both Python 2 and 3, meaning
1098 that either version can be used as inferior Python by python.el.
1100 *** Python mode now has `pdbtrack' functionality. When using pdb to
1101 debug a Python program, pdbtrack notices the pdb prompt and displays
1102 the source file and line that the program is stopped at, much the same
1103 way as gud-mode does for debugging C programs with gdb.
1107 *** The default value of `recentf-keep' prevents from checking of
1108 remote files, if there is no established connection to the
1109 corresponding remote host.
1113 *** Rmail no longer converts the messages to Babyl format.
1114 Instead, it uses UNIX mbox format, both on disk and in Rmail buffers,
1115 and does conversion and decoding when a message is displayed.
1117 The first time you visit an Rmail file in Babyl format, Rmail
1118 automatically converts it to mbox format. This is a one-time
1119 conversion, but it can take a few minutes, depending on how fast is
1120 your machine and on the size of the file. You should find the rest of
1121 Rmail usage unaltered.
1123 However, M-x set-rmail-inbox-list now lasts only for one session
1124 because there is no way to save the list of inbox files in an
1127 Also, whereas with Babyl format M-x find-file would switch to Rmail
1128 mode, with mbox format this is no longer the case (there being no way
1129 to add an "-*- rmail-*-" cookie to an mbox file). Use C-u M-x rmail
1132 If you have written any extensions to Rmail, they are likely to need
1133 updating. Conceptually, the Rmail buffer that you see is no longer
1134 just a narrowed portion of the whole. So you cannot access the whole
1135 of a message (or message collection) by a simple save-restriction and
1136 widen. Instead, there are two buffers: the rmail-buffer, and the
1137 rmail-view-buffer. The former is the buffer that you see, the latter
1138 is invisible. Most of the time, the invisible `view' buffer contains
1139 the full contents of the Rmail file, and the Rmail buffer contains a
1140 decoded copy of the current message (with only a subset of the
1141 headers). In this state, Rmail is said to be `swapped'.
1143 You may find the following functions useful:
1145 `rmail-get-header' and `rmail-set-header' get or set the value of a
1146 message header, whether or not it is currently visible.
1148 `rmail-apply-in-message' is a general purpose function that calls a
1149 function (with arguments) which you specify on the full text of a given
1150 message. To further narrow to just the headers, search forward for "\n\n".
1152 *** The new command `rmail-mime' displays MIME messages.
1153 It is bound to `v' in Rmail buffers and summaries. It displays plain
1154 text and multipart messages in a temporary buffer, and offers buttons
1155 to save attachments.
1157 *** The command `rmail-redecode-body' no longer accepts the optional arg RAW.
1158 Since Rmail now holds messages in their original undecoded form in a
1159 separate buffer, `rmail-redecode-body' no longer encodes the original
1160 message, and therefore there should be no need to avoid encoding it.
1162 *** The o command is now `rmail-output'. It is an all-purpose command
1163 for copying messages from Rmail and appending them to files. It
1164 handles Babyl-format files as well as mbox-format files, and it
1165 handles both kinds properly when they are visited in Emacs. It always
1166 copies the full headers of the message.
1168 *** The C-o command is now `rmail-output-as-seen'. It uses
1169 the message as displayed, appending it to an mbox file.
1171 *** The modified status of the Rmail buffer is reported in the mode-line.
1172 Previously, this information was hidden.
1176 *** New option latex-indent-within-escaped-parens
1177 permits to customize indentation of LaTeX environments delimited
1182 *** If the gpm mouse server is running and t-mouse-mode is enabled,
1183 Emacs uses a Unix socket in a GNU/Linux console to talk to server,
1184 rather than faking events using the client program mev. This C level
1185 approach provides mouse highlighting and help echoing in the
1190 *** New connection methods.
1191 The new methods "plinkx", "plink2", "psftp", "sftp" and "fish" have
1192 been introduced. There are also new so-called gateway methods
1193 "tunnel" and "socks".
1196 IPv6 addresses are supported now as host names. They must be embedded
1197 in square brackets, like in "/ssh:[::1]:".
1199 *** Multihop syntax has been removed.
1200 The pseudo-method "multi" has been removed. Instead, multi hops
1201 can be specified by the new variable `tramp-default-proxies-alist'.
1203 *** More default settings.
1204 Default values can be set via the variables `tramp-default-user',
1205 `tramp-default-user-alist' and `tramp-default-host'.
1207 *** Connection information is cached.
1208 In order to reduce connection setup, information about used
1209 connections is kept persistently in a file. The name of this file is
1210 defined in the variable `tramp-persistency-file-name'.
1212 *** Control of remote processes.
1213 Running processes on a remote host can be controlled by settings in
1214 `tramp-remote-path' and `tramp-remote-process-environment'.
1216 *** Success of remote copy is checked.
1217 When the variable `file-precious-flag' is set, the success of a remote
1218 file copy is checked via the file's checksum.
1220 *** Passwords can be read from an authentification file.
1221 Tramp uses the package `auth-source' to read passwords from a file, if
1224 ** VC and related modes
1226 *** VC now supports applying VC operations to a set of files at a time.
1227 This enables VC to work much more effectively with changeset-oriented
1228 version-control systems such as Subversion, GNU Arch, Mercurial, Git
1229 and Bzr. VC will now pass a multiple-file commit to these systems as
1232 *** vc-dir is a new command that displays file names and their VC
1233 status. It allows to apply various VC operations to a file, a
1234 directory or a set of files/directories.
1236 *** VC switches are no longer appended, rather the first non-nil value is used.
1237 (This was for the most part true in Emacs 22, but was not advertised).
1238 This is because there is an increasing variety of VC systems, and they
1239 do not all accept the same "common" options. For example, a CVS diff
1240 command used to append the values of `vc-cvs-diff-switches',
1241 `vc-diff-switches', and `diff-switches'. Now the first non-nil value
1242 from that sequence is used. The special value `t' means "no switches".
1244 *** Clicking on the VC mode-line entry now pops the VC menu.
1246 *** The VC mode-line entry now has a tooltip that explains the VC file status.
1248 *** In VC Annotate mode, the key bindings have changed to use lower
1249 case keys instead of the upper case keys used in the past.
1251 *** In VC Annotate mode, for VC systems that support changesets, you can
1252 see the diff for the whole changeset (not only for the current file)
1253 by typing the D key. Using the "Show changeset diff of revision at
1254 line" menu entry does the same thing.
1256 *** In VC Annotate mode, you can type v to toggle the annotation visibility.
1258 *** In VC Annotate mode, you can type f to show the file revision on
1261 *** Asynchronous VC commands display [Waiting...] in the mode-line
1262 of the corresponding buffer as long as the asynchronous process is
1265 *** Log entries can be modified using the key "e" in log-view.
1266 For now only CVS, RCS, SCCS and SVN support this functionality.
1267 This is done by the `modify-change-comment' backend function.
1269 *** In log-view-mode, for VC systems that support changesets, you can
1270 see the diff for the whole changeset (not only for the current file)
1271 by typing the D key or using the "Changeset Diff" menu entry.
1273 *** In Log Edit mode, C-c C-d now shows the diff for the files involved.
1275 *** vc-git supports the "git grep" command.
1277 *** VC Support for Meta-CVS has been removed for lack of a maintainer able
1278 to update it to the new VC.
1282 *** comint-mode uses `start-file-process' now (see Lisp Changes).
1283 If `default-directory' is a remote file name, subprocesses are started
1284 on the corresponding remote system.
1286 *** Eldoc highlights the function argument under point
1287 with the face `eldoc-highlight-function-argument'.
1289 *** In Etags, the --members option is now the default.
1290 Use --no-members if you want the old default behavior of not tagging
1291 struct members in C, members variables in C++ and variables in PHP.
1293 *** The `gdb' command only works with the graphical interface now.
1294 Use `gud-gdb' if you want the (old) text command mode.
1296 *** goto-address.el provides two new minor modes, goto-address-mode and
1297 goto-address-prog-mode, which buttonize URLS and email addresses.
1299 *** The new command `eshell/info' runs info in an eshell buffer.
1301 *** The new variable `ffap-rfc-directories' specifies a list of local
1302 directories in which `ffap-rfc' will first search for RFCs.
1304 *** hide-ifdef-mode allows shadowing ifdef-blocks instead of hiding them.
1305 See option `hide-ifdef-shadow' and function `hide-ifdef-toggle-shadowing'.
1307 *** `icomplete-prospects-height' now supercedes `icomplete-prospects-length'.
1309 *** Info displays breadcrumbs in the header of the page.
1310 See Info-breadcrumbs-depth to control it.
1312 *** net-utils has an `iwconfig' command, similar to the existing `ifconfig'.
1313 It is used to configure wireless interfaces.
1315 *** The pcmpl-unix package supports hostname completion for ssh and scp.
1317 *** sgml-electric-tag-pair-mode lets you simultaneously edit matched tag pairs.
1319 *** smerge-refine highlights word-level details of changes in conflict.
1320 It's used automatically as you move through conflicts, see
1321 smerge-auto-refine-mode.
1323 *** talk.el has been extended for multiple tty support.
1325 *** A new command `display-time-world' has been added to the Time
1326 package. It creates a buffer with an updating time display using
1329 *** The appearance of superscript and subscript in TeX is more customizable.
1330 See the documentation of the variables: tex-fontify-script,
1331 tex-font-script-display, tex-suscript-height-ratio, and
1332 tex-suscript-height-minimum.
1334 *** view-remove-frame-by-deleting is now by default t
1335 since users found iconification of view-mode frames distracting.
1337 *** WoMan tries to add locale-specific manual page directories to the
1338 search path. This can be disabled by setting `woman-locale' to nil.
1341 * Changes in Emacs 23.1 on non-free operating systems
1343 ** Case is now considered significant in completion on MS-Windows.
1344 The default value of `completion-ignore-case' is now nil on
1345 MS-Windows, the same as it is for other operating systems. The
1346 variable doesn't apply to reading a file name -- in that case Emacs
1347 heeds `read-file-name-completion-ignore-case' instead.
1349 ** IPv6 is supported on MS-Windows.
1350 Emacs now supports IPv6 on Windows XP and later, and earlier versions
1351 of Windows with third party IPv6 stacks installed. In Emacs 22, IPv6 was
1352 supported on other platforms, but not on Windows due to using the winsock
1353 1.1 header file, even though Emacs was linking to the winsock 2 library.
1355 ** Busy cursor (hourglass) now displays on MS-Windows.
1356 When Emacs is busy, an hourglass mouse cursor is displayed on Windows.
1357 In Emacs 22 only X supported the busy cursor.
1359 ** Battery status is available on MS-Windows
1360 Emacs can now display the battery status in the mode-line when enabled with
1361 display-battery-mode or from the Options menu. More verbose battery
1362 information is also available with the command `battery'. In Emacs 22
1363 battery status was supported only on GNU/Linux and Mac.
1365 ** More keys available on MS-Windows.
1366 Keys normally associated with IMEs, and some exotic keys not normally found
1367 on standard keyboards have been given names so they can be bound to functions
1368 inside Emacs. If there are keys on your keyboard that have not been exposed
1369 to Emacs in the past, try C-h k to see if they are available now.
1371 Emacs can now bind functions to the extra buttons for media player and
1372 browser control present on some keyboards. These buttons are disabled
1373 by default, since enabling them prevents their system-wide use when
1374 Emacs has focus. To enable them, set the variable
1375 w32-pass-multimedia-buttons to nil. See the doc string of that variable
1376 for the list of extra keys that are available.
1378 ** BDF fonts no longer supported on MS-Windows.
1379 The font backend was completely rewritten for this release. The focus
1380 on Windows has been getting acceptable performance and full unicode
1381 support, including complex script shaping for native Windows fonts. A
1382 rewrite of the BDF font support has not happened due to lack of time
1383 and developers. If demand still exists for such a backend even with
1384 the improved language support for native Windows fonts, future
1385 development in this direction will most likely be based on the
1386 freetype library, giving access to a wider range of font formats.
1389 * Incompatible Lisp Changes in Emacs 23.1
1391 ** Variables cannot be both buffer-local and frame-local any more.
1393 ** `functionp' returns nil for special forms.
1394 I.e., it only returns t for objects that can be passed to `funcall'.
1396 ** The behavior of map-char-table has changed. It may call the
1397 specified function with a cons (FROM . TO) as a key if characters in
1398 that range have the same value.
1402 *** The function `dired-call-process' has been removed.
1404 *** The multibyteness of process filters is now determined by the
1405 coding-system used for decoding. The functions
1406 `process-filter-multibyte-p' and `set-process-filter-multibyte' are
1409 ** The variable `byte-compile-warnings' can now be a list starting with `not',
1410 meaning to disable the specified warnings. The meaning of this list
1411 may therefore be the reverse of what you expect (of course, this is
1412 only an issue if you make use of the new `not' syntax). Rather than
1413 checking/manipulating elements directly, use the new functions
1414 `byte-compile-warning-enabled-p', `byte-compile-disable-warning', and
1415 `byte-compile-enable-warning.'
1417 ** `mode-name' is no longer guaranteed to be a string.
1418 Use `(format-mode-line mode-name)' to ensure a string value.
1420 ** The function x-font-family-list has been removed.
1421 Use the new function font-family-list (see Lisp Changes, below).
1423 ** Internationalization changes
1425 *** The value of the function `charset-id' is now always 0.
1427 *** The functions `register-char-codings' and `coding-system-spec'
1430 *** The cpXXX coding systems are now supported automatically.
1431 The functions cp-...-codepage, which you had to use in Emacs 22 to
1432 enable support for these coding systems, have been deleted.
1434 *** The following features have been removed. They were used for
1435 displaying various scripts with specific fonts, and are no longer
1436 needed now that OpenType font support is available:
1438 **** `devanagari' and `devan-util', and all associated devanagari-* and
1439 dev-* functions and variables (formerly used for Devanagari script).
1441 **** `kannada' and `knd-util', and all associated kannada-* and knd-*
1442 functions and variables (formerly used for Kannada script).
1444 **** `malayalam' and `mlm-util', and all associated malayalam-* and
1445 mlm-* functions and variables (formerly used for Malayalam script).
1447 **** `tamil' and `tml-util, and all associated tamil-* and tml-*
1448 functions and variables (formerly used for Tamil script).
1450 *** The meaning of NAME argument of `set-fontset-font' is changed.
1451 Previously nil is accepted as the default fontset. Now, nil is for
1452 the fontset of the selected frame and t is for the default fontset.
1454 *** The meaning of FONTSET argument of `print-fontset' is changed.
1455 Now, nil is for the fontset of the selected frame and t is for the
1458 ** If a function in write-region-annotate-functions returns with a
1459 different buffer current, Emacs no longer kills that buffer
1460 automatically. This behavior existed in previous versions of Emacs,
1461 but was undocumented. To kill a buffer after write-region, give the
1462 variable `write-region-post-annotation-function' a buffer-local value
1465 ** The variable temp-file-name-pattern has been removed.
1466 This variable was only used by call-process-region, which now uses
1467 temporary-file-directory instead.
1469 ** The COUNT and SYSTEM-FLAG arguments to define-abbrev have been
1470 removed. The function now takes extra arguments for specifying
1471 arbitrary abbrev properties.
1473 ** end-of-defun-function is now guaranteed to work only when called
1474 from the start of a defun. It must now leave point exactly at the end
1475 of defun, since `end-of-defun' now itself moves forward over
1476 whitespace after calling it.
1479 * Lisp Changes in Emacs 23.1
1481 ** The new variable `generate-autoload-cookie' controls the magic comment
1482 string used by `update-file-autoloads' to find autoloaded forms. The
1483 variable `generated-autoload-file' similarly controls the name of the
1484 file where `update-file-autoloads' writes the calls to `autoload'.
1485 The default values are ";;;###autoload" and `loaddefs.el',
1488 ** New primitives `list-system-processes' and `process-attributes'
1489 let Lisp programs access the processes that are running on the local
1490 machine. See the doc strings of these functions for more details.
1491 Not all platforms support accessing this information; on those that
1492 don't, these primitives will return nil.
1494 ** New variable `user-emacs-directory'.
1495 Use this instead of "~/.emacs.d".
1497 ** If a local hook function has a non-nil `permanent-local-hook'
1498 property, `kill-all-local-variables' does not remove it from the local
1499 value of the hook variable; it remains even if you change major modes.
1501 ** `frame-inherited-parameters' lets new frames inherit parameters from
1504 ** New keymap `input-decode-map' overrides like key-translation-map, but
1505 applies before function-key-map. Also it is terminal-local contrary to
1506 key-translation-map. Terminal-specific key-sequences are generally added to
1507 this map rather than to function-key-map now.
1509 ** `ignore-errors' is now a standard macro (does not require the CL package).
1511 ** `interprogram-paste-function' can now return one string or a list
1512 of strings. In the latter case, Emacs puts the second and following
1513 strings on the kill ring.
1515 ** In `condition-case', a handler can specify "let the debugger run first".
1516 You do this by writing `debug' in the list of conditions to be handled,
1521 ((debug error) nil))
1523 ** clone-indirect-buffer now runs the clone-indirect-buffer-hook.
1525 ** `beginning-of-defun-function' now takes one argument, the count given to
1526 `beginning-of-defun'. (N.B. `end-of-defun-function' doesn't take any
1529 ** `file-remote-p' has new optional parameters IDENTIFICATION and CONNECTED.
1530 IDENTIFICATION specifies which part of the remote identifier has to be
1531 returned. With CONNECTED passed non-nil, it is checked whether a
1532 remote connection has been established already.
1534 ** The new macro `declare-function' suppresses compiler warnings about
1535 undefined functions.
1537 ** Changes to interactive function handling
1539 *** The new interactive spec code ^ says to first call
1540 handle-shift-selection if shift-select-mode is non-nil, before reading
1541 the command arguments. This is used for shift-selection (see above).
1543 *** Built-in functions can now have an interactive specification that
1544 is not a prompt string. If the `intspec' parameter of a `DEFUN'
1545 starts with a `(', the string is evaluated as a Lisp form.
1547 *** The interactive-form of a function can be added post-facto via the
1548 `interactive-form' symbol property. Mostly useful to add complex
1549 interactive forms to subroutines.
1553 *** Commands should use `use-region-p' to test whether there is
1554 an active region that they should operate on.
1556 *** `region-active-p' returns non-nil when Transient Mark mode is
1557 enabled and the mark is active. Most commands that act specially on
1558 the active region in Transient Mark mode should use `use-region-p'
1559 instead of `region-active-p', because `use-region-p' obeys the new
1560 user option `use-empty-active-region' (see Editing Changes, above).
1562 *** If a command sets `transient-mark-mode' to (only . OLDVAL), that
1563 means to activate transient-mark-mode temporarily, until the next
1564 unshifted point motion command or mark deactivation. Afterwards,
1565 reset transient-mark-mode to the value OLDVAL. The values `only' and
1566 `identity', introduced in Emacs 22, are now deprecated.
1568 ** Emacs session information
1570 *** The new variables `before-init-time' and `after-init-time' record the
1571 value of `current-time' before and after Emacs loads the init files.
1573 *** The new function `emacs-uptime' returns the uptime of an Emacs instance.
1575 *** The new function `emacs-init-time' returns the duration of the
1576 Emacs initialization.
1578 ** Changes affecting display-buffer
1580 *** display-buffer tries to be smarter when splitting windows.
1581 The new option split-window-preferred-function lets you specify your own
1582 function to pop up new windows. Its default value split-window-sensibly
1583 can split a window either vertically or horizontally, whichever seems
1584 more suitable in the current configuration. You can tune the behavior
1585 of split-window-sensibly by customizing split-height-threshold and the
1586 new option split-width-threshold. Both options now take the value nil
1587 to inhibit splitting in one direction. Setting split-width-threshold to
1588 nil inhibits horizontal splitting and gets you the behavior of Emacs 22
1589 in this respect. In any case, display-buffer may now split the largest
1590 window vertically even when it is not as wide as the containing frame.
1592 *** If pop-up-frames has the value `graphic-only', display-buffer only
1593 makes a separate frame on graphic displays.
1595 *** select-frame and set-frame-selected-window have a new optional
1596 argument NORECORD. If non-nil, this will avoid messing with the order
1597 of recently selected windows and the buffer list.
1599 ** Window parameters can now be defined.
1600 These are analogous to frame parameters, but are associated with
1603 *** The new functions window-parameters, window-parameter, and
1604 set-window-parameter are used to query and set window parameters.
1606 ** Minibuffer and completion changes
1608 *** A list of default values can be specified for the DEFAULT argument of
1609 functions `read-from-minibuffer', `read-string', `read-command',
1610 `read-variable', `read-buffer', `completing-read'. Elements of this list
1611 are available for inserting into the minibuffer by typing `M-n'.
1612 For empty input these functions return the first element of this list.
1614 *** New function `read-regexp' uses the regexp history and some useful
1615 regexp defaults (string at point, last Isearch/replacement regexp/string)
1616 via M-n when reading a regexp in the minibuffer.
1618 *** minibuffer-local-must-match-filename-map is now named
1619 minibuffer-local-filename-must-match-map.
1621 *** The `require-match' argument to `completing-read' accepts the new
1622 values `confirm-only' and `confirm-after-completion'.
1624 ** Search and replacement changes
1626 *** The regexp form \(?<num>:<regexp>\) specifies the group number explicitly.
1628 *** New function `match-substitute-replacement' returns the result of
1629 `replace-match' without actually using it in the buffer.
1631 *** The new variable `replace-search-function' determines the function
1632 to use for searching in query-replace and replace-string. The
1633 function it specifies is called by `perform-replace' when its 4th
1636 *** The new variable `replace-re-search-function' determines the
1637 function to use for searching in `query-replace-regexp',
1638 `replace-regexp', `query-replace-regexp-eval', and
1639 `map-query-replace-regexp'. The function it specifies is called by
1640 `perform-replace' when its 4th argument is non-nil.
1642 *** New keymap `search-map' bound to `M-s' provides global bindings
1643 for search related commands.
1645 *** New keymap `multi-query-replace-map' contains additonal keys bound
1646 to `automatic-all' and `exit-current' for multi-buffer interactive replacement.
1648 *** The variable `inhibit-changing-match-data', if non-nil, prevents
1649 the search and match primitives from changing the match data.
1651 *** New functions `word-search-forward-lax' and `word-search-backward-lax'.
1652 These are like `word-search-forward and `word-search-backward', except
1653 that the end of the search string need not match a word boundary,
1654 unless it ends in whitespace.
1656 ** File handling changes
1658 *** set-file-modes is now interactive and can take the mode value in
1659 symbolic notation thanks to auxiliary functions.
1661 *** file-local-variables-alist stores an alist of file-local
1662 variables defined in the current buffer.
1666 *** Each face can be remapped to a different face definition using the
1667 variable `face-remapping-alist'. This is an alist that maps faces to
1668 replacement definitions (which can be face names, lists of face names,
1669 or attribute/value plists. If this variable is buffer-local, the
1670 remapping occurs only in that buffer.
1672 *** text-scale-mode remaps the default face to a larger or smaller
1673 size in the current buffer. This feature is used by the Buffer Face
1674 menu and the new `C-x C-+', `C-x C--', and `C-x C-0' commands (see
1675 Editing Changes, above).
1679 **** `face-remap-add-relative' adds a face remapping entry to the
1682 **** ``face-remap-remove-relative' removes a face remapping entry from
1685 **** `face-remap-reset-base' restores a face to its global definition.
1687 **** `face-remap-set-base' sets the base remapping of a face.
1691 *** The new function `start-file-process' is similar to `start-process',
1692 but obeys file handlers. The file handler is chosen based on
1693 `default-directory'. The functions `start-file-process-shell-command'
1694 and `process-file-shell-command' are also new; they call internally
1695 `start-file-process' and `process-file', respectively.
1697 *** The new function `process-lines' executes an external program and
1698 returns its output as a list of lines.
1700 ** Character code, representation, and charset changes.
1702 *** In multibyte buffers and strings, characters are represented by
1703 UTF-8 byte sequences. The character code space is now 0x0..0x3FFFFF
1704 with no gap; code points 0x0..0x10FFFF are Unicode characters of the
1705 same code points, while code points 0x3FFF80..0x3FFFFF are raw 8-bit
1708 *** Generic characters no longer exist.
1710 *** The concept of a charset has changed. A single character may
1711 belong to multiple charsets (e.g. a-grave, U+00E0, belongs to charsets
1712 unicode, iso-8859-1, iso-8859-3, etc).
1714 **** The dimension of a charset is now 1, 2, 3, or 4, and the size of
1715 each dimension is no longer limited to 94 or 96.
1717 **** A dynamic charset priority list is used to infer the charset of
1718 characters for display.
1720 *** The functions `split-char' and `make-char' now accept up to 4
1721 positional codes instead of just 2.
1723 *** The functions `encode-char' and `decode-char' now accept any character sets.
1725 *** The function `define-charset' now accepts a completely different
1726 form of arguments (old-style arguments still work).
1728 *** The value of the function `char-charset' depends on the current
1729 priorities of charsets.
1731 *** The function get-char-code-property now accepts many Unicode base
1732 character properties. They are `name', `general-category',
1733 `canonical-combining-class', `bidi-class', `decomposition',
1734 `decimal-digit-value', `digit-value', `numeric-value', `mirrored',
1735 `old-name', `iso-10646-comment', `uppercase', `lowercase', and
1738 *** The functions `modify-syntax-entry' and `modify-category-entry' now
1739 accept a cons of characters as the first argument, and modify all
1740 entries in that range of characters.
1742 *** Use of `translation-table-for-input' for character code unification
1743 is now obsolete, since Emacs 23.1 and later uses Unicode as basis for
1744 internal representation of characters.
1748 **** `characterp' returns t if and only if the argument is a character.
1749 This replaces `char-valid-p', which is now obsolete.
1751 **** `max-char' returns the maximum character code (currently #x3FFFFF).
1753 **** `define-charset-alias' defines an alias of a charset.
1755 **** `set-charset-priority' sets priorities of charsets.
1757 **** `charset-priority-list' returns a prioritized list of charsets.
1759 **** `unibyte-string' makes a unibyte string from bytes.
1761 **** `define-char-code-property' defines a character code property.
1763 **** `char-code-property-description' returns the description string of
1764 a character code property.
1768 **** `find-word-boundary-function-table' is a char-table of functions to
1769 search for a word boundary.
1771 **** `char-script-table' is a char-table of script names.
1773 **** `char-width-table' is a char-table of character widths.
1775 **** `print-charset-text-property' controls how to handle `charset' text
1776 property on printing a string.
1778 **** `printable-chars' is a char-table of printable characters.
1780 ** Code conversion changes
1782 *** The new function `define-coding-system' should be used to define a
1783 coding system instead of `make-coding-system' (which is now obsolete).
1785 *** The functions `encode-coding-region' and `decode-coding-region'
1786 have an optional 4th argument to specify where the result of
1787 conversion should go.
1789 *** The functions `encode-coding-string' and `decode-coding-string'
1790 have an optional 4th argument specifying a buffer to store the result
1793 *** The new variable `inhibit-null-byte-detection' controls whether to
1794 consider text with null bytes as binary data. By default, it is
1795 `nil', and Emacs uses `no-conversion' for any text containing null
1798 *** The functions `set-coding-priority' and `make-coding-system' are obsolete.
1802 **** `with-coding-priority' executes Lisp code using the specified
1803 coding system priority order.
1805 **** `check-coding-systems-region' checks if the text in the region is
1806 encodable by the specified coding systems.
1808 **** `coding-system-aliases' returns a list of aliases of a coding system.
1810 **** `coding-system-charset-list' returns a list of charsets supported
1813 **** `coding-system-priority-list' returns a list of coding systems
1814 ordered by their priorities.
1816 **** `set-coding-system-priority' sets priorities of coding systems.
1818 **** `coding-system-from-name' returns a coding system matching with
1822 ** There is a new input method, Robin, different from Quail.
1823 It has three functionalities:
1824 i) a simple input method (converts an ASCII sequence into a string).
1825 ii) converts an existing buffer substring into another string
1826 iii) reverse conversion (each character produced by a
1827 robin rule can hold the original ASCII sequence as a char-code-property)
1829 *** The new function `robin-define-package' defines a Robin package.
1831 *** The new function `robin-modify-package' modifies an existing Robin package.
1833 *** The new function `robin-use-package' starts using a Robin package
1836 *** The new function `string-to-unibyte' is like `string-as-unibyte'
1837 but signals an error if STRING contains a non-ASCII, non-eight-bit
1840 ** Changes related to the new font backend
1842 *** Which font backends to use can be specified by the X resource
1843 "FontBackend". For instance, to use both X core fonts and Xft fonts:
1845 Emacs.FontBackend: x,xft
1847 If this resource is not set, Emacs tries to use all font backends
1848 available on your graphic device.
1850 *** New frame parameter `font-backend' specifies a list of
1851 font-backends supported by the frame's graphic device. On X, they are
1852 currently `x' and `xft'.
1854 *** The function `set-fontset-font' now accepts a script name as the
1855 second argument, and has an optional 5th argument to control how to
1860 **** `fontp' checks if the argument is a font-spec or font-entity.
1862 **** `font-spec' creates a new font-spec object.
1864 **** `font-get' returns a font property value.
1866 **** `font-put' sets a font property value.
1868 **** `font-face-attributes' returns a plist of face attributes set by a font.
1870 **** `list-fonts' returns a list of font-entities matching a font spec.
1872 **** `find-font' returns the font-entity best matching the given font spec.
1874 **** `font-family-list' returns a list of family names of available fonts.
1876 **** `font-xlfd-name' returns an XLFD name of a given font spec, font
1877 entity, or font object.
1879 **** `clear-font-cache' clears all font caches.
1881 ** Changes related to multiple-terminal (multi-tty) support
1883 *** $TERM is now set to `dumb' for subprocesses. If you want to know the
1884 $TERM inherited by Emacs you will have to look inside initial-environment.
1886 *** $DISPLAY is now dynamically inherited from the frame's `display'.
1888 *** The `window-system' variable is now frame-local. The new
1889 `initial-window-system' variable contains the `window-system' value
1890 for the first frame. `window-system' is also now a function that
1891 takes a frame argument.
1893 *** The `keyboard-translate-table' variable and the terminal and
1894 keyboard coding systems are now terminal-local.
1896 *** You can specify a terminal device (`tty' parameter) and a terminal
1897 type (`tty-type' parameter) to `make-terminal-frame'.
1899 *** The function `make-frame-on-display' now works during a tty
1902 *** A new `terminal' data type.
1903 The functions `get-device-terminal', `terminal-parameters',
1904 `terminal-parameter', `set-terminal-parameter' use this data type.
1906 *** Function key sequences are now mapped using `local-function-key-map',
1907 a new variable. This inherits from the global variable function-key-map,
1908 which is not used directly any more.
1912 **** before-hack-local-variables-hook is called after setting new
1913 variable file-local-variables-alist, and before actually applying the
1914 file-local variables.
1916 **** `suspend-tty-functions' and `resume-tty-functions' are called
1917 after a tty frame has been suspended or resumed, respectively. The
1918 functions are called with the terminal id of the frame being
1919 suspended/resumed as a parameter.
1921 **** The special hook `delete-terminal-functions' is called before
1922 deleting a terminal.
1926 **** `delete-terminal'
1932 *** `initial-environment' holds the environment inherited from Emacs's parent.
1934 ** Redisplay changes
1936 *** For underlined characters, the distance between the underline and
1937 the baseline is controlled by a new variable, `underline-minimum-offset'.
1939 *** You can now pass the value of the `invisible' property to
1940 invisible-p to check whether it would cause the text to be invisible.
1941 This is convenient when checking invisibility of text with no buffer
1942 position (e.g. in before/after-strings).
1944 *** `clear-image-cache' can be told to flush only images of a specific file.
1946 *** `vertical-motion' can now be given a goal column.
1947 It now accepts a cons cell (COLS . LINES) in its first argument, which
1948 says to stop, where possible, at a pixel x-position equal to COLS
1949 times the default column width.
1951 *** redisplay-end-trigger-functions, set-window-redisplay-end-trigger,
1952 and window-redisplay-end-trigger are obsolete. Use `jit-lock-register'
1955 *** The new variables `wrap-prefix' and `line-prefix' specify display
1956 specs which are appended at display-time to every continuation line
1957 and non-continuation line, respectively. In addition, Emacs
1958 recognizes the `wrap-prefix' and `line-prefix' text or overlay
1959 properties; these have the same effects as the variables of the same
1960 name, but take precedence.
1962 ** The Lisp interpreter now treats non-breaking space as whitespace.
1964 ** Miscellaneous new functions
1966 *** `apply-partially' performs a "curried" application of a function.
1968 *** `buffer-swap-text' swaps text between two buffers. This can be
1969 useful for modes such as tar-mode, archive-mode, RMAIL.
1971 *** `combine-and-quote-strings' produces a single string from a list of strings
1972 sticking a separator string in between each pair, and quoting those
1973 strings that include the separator as their substring. Useful for
1974 consing shell command lines from the individual arguments.
1976 *** `custom-note-var-changed' tells Custom to treat the change in a
1977 certain variable as having been made within Custom.
1979 *** `face-all-attributes' returns an alist describing all the basic
1980 attributes of a given face.
1982 *** `format-seconds' converts a number of seconds into a readable
1983 string of days, hours, etc.
1985 *** `image-refresh' refreshes all images associated with a given image
1988 *** `locate-user-emacs-file' helps packages to select the appropriate
1989 place to save user-specific files. It defaults to `user-emacs-directory'
1990 unless the file already exists at $HOME.
1992 *** `read-color' reads a color name using the minibuffer.
1994 *** `read-shell-command' does what its name says, with completion. It
1995 uses the minibuffer-local-shell-command-map for that.
1997 *** `split-string-and-unquote' splits a string into a list of substrings
1998 on the boundaries of a given delimiter, and unquotes the substrings that
1999 are quoted. Useful for taking apart shell commands.
2001 *** The two new functions `looking-at-p' and `string-match-p' can do
2002 the same matching as `looking-at' and `string-match' without changing
2005 *** The two new functions `make-serial-process' and
2006 `serial-process-configure' provide a Lisp interface to the new serial
2007 port support (see Emacs changes, above).
2009 ** Miscellaneous new variables
2011 *** `auto-save-include-big-deletions', if non-nil, means auto-save is
2012 not turned off automatically after a big deletion.
2014 *** `read-circle', if nil, disables the reading of recursive Lisp
2015 structures using the #N= and #N# syntax.
2017 *** `this-command-keys-shift-translated' is non-nil if the key
2018 sequence invoking the current command was found by shift-translation.
2020 *** `window-point-insertion-type' determines the insertion-type of the
2021 marker used for window-point.
2023 *** bookmark provides `bookmark-make-record-function' so special major
2024 modes like Info can teach bookmark.el how to save and restore the
2027 *** `fill-forward-paragraph-function' specifies which function the
2028 filling code should use to find paragraph boundaries.
2031 * New Packages for Lisp Programming in Emacs 23.1
2033 ** The new package avl-tree.el deals with the AVL tree data structure.
2035 ** The new package check-declare.el verifies the accuracy of
2036 declare-function macros (see Lisp Changes, above).
2038 ** find-cmd.el can build `find' commands using lisp syntax.
2040 ** The package misearch.el has been added. It allows Isearch to search
2041 through multiple buffers. A variable `multi-isearch-next-buffer-function'
2042 defines the function to call to get the next buffer to search in the series
2043 of multiple buffers. Top-level commands `multi-isearch-buffers',
2044 `multi-isearch-buffers-regexp', `multi-isearch-files' and
2045 `multi-isearch-files-regexp' accept a single argument that specifies
2046 a list of buffers/files to search for a string/regexp.
2048 ** The new major mode `special-mode' is intended as a parent for
2049 major modes such as those that set the "'mode-class 'special" property.
2052 ----------------------------------------------------------------------
2053 This file is part of GNU Emacs.
2055 GNU Emacs is free software: you can redistribute it and/or modify
2056 it under the terms of the GNU General Public License as published by
2057 the Free Software Foundation, either version 3 of the License, or
2058 (at your option) any later version.
2060 GNU Emacs is distributed in the hope that it will be useful,
2061 but WITHOUT ANY WARRANTY; without even the implied warranty of
2062 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2063 GNU General Public License for more details.
2065 You should have received a copy of the GNU General Public License
2066 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2071 paragraph-separate: "[
\f]*$"
2074 arch-tag: e759449d-88b3-4de4-9900-3a6c3dfa23e2