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.
36 ** `make install' now consistently ignores umask, creating a
37 world-readable install.
39 * Startup Changes in Emacs 23.2
41 ** Command-line option -Q (--quick) now also disables loading X resources.
42 Note however that this does not affect Lucid or Motif widgets, if you
43 are using those toolkits. On Windows, this option causes Emacs to
44 ignore Registry settings, though environment variables set on the
45 Registry are still honored.
47 *** The new variable `inhibit-x-resources' shows whether X resources
50 * Changes in Emacs 23.2
52 ** The maximum size of buffers (as well as the largest fixnum) is doubled.
53 On typical 32bit systems, buffers can now be up to 512MB.
55 ** Function arguments in *Help* buffers are now in uppercase by default.
56 You can customize the new variable `help-downcase-arguments' to change it.
58 ** Unibyte sessions are now considered obsolete.
59 I.e. the use of the environment variable EMACS_UNIBYTE, or command line
60 arguments --unibyte, --multibyte, --no-multibyte, and --no-unibyte
61 is deprecated. Similarly for custom-izing enable-multibyte-characters, or
62 setting default-enable-multibyte-characters.
64 ** The default value of `trash-directory' has changed to nil, which
65 means that `move-file-to-trash' trashes files according to
66 freedesktop.org specifications, the same method used by the Gnome,
67 KDE, and XFCE desktops. (This change has no effect on Windows, which
68 uses `system-move-file-to-trash' for trashing.)
71 ** Emacs frames can be maximized.
72 The command line arguments -mm/--maximized and the value maximized to the
73 frame parameter fullscreen makes the Emacs frame maximized.
76 ** New frame parameter sticky makes Emacs frames sticky in virtual desktops.
78 ** The pointer now becomes invisible when typing.
79 Customize make-pointer-invisible to turn it off.
81 ** Emacs can use the system default monospaced font in Gnome.
82 The use of the system default font can be turned on or off by customizing
83 the variable 'font-use-system-font'. It is off by default.
84 If the system default is changed, Emacs changes also.
85 This requires that gconf-support is built in. If configure finds the
86 gconf-libraries, that support is included. Gconf-support can be
87 turned off with the configure option --without-gconf.
89 ** Emacs now reacts to Xft-changes made by configuration tools on X11.
90 Changes to antialias, hinting, hintstyle, RGBA, DPI and lcdfilter are
91 handeled. The XSETTINGS mechanism is used to implement this.
93 ** Killing a buffer with a running process now asks for confirmation.
94 You can remove this query in two ways: either remove
95 `process-kill-buffer-query-function' from `kill-buffer-query-functions',
96 or set the appropriate process flag with `set-process-query-on-exit-flag'.
98 ** The variable `load-in-progress' won't get corrupted by binding it
99 with `let'. In certain situations, loading an Emacs Lisp file from
100 source while in the midst of loading another file (e.g., with
101 `require' or `autoload') could cause the value of `load-in-progress'
102 to be corrupted once the outer load completed. Most code doesn't care
103 about this, but some (like c-mode) may check it.
105 ** File-local variable changes
107 *** Specifying a minor mode as a local variables enables that mode,
108 unconditionally. The previous behavior, toggling the mode, was
109 neither reliable nor generally desirable.
111 *** New commands for adding and removing file-local variables:
112 `add-file-local-variable', `delete-file-local-variable',
113 `add-file-local-variable-prop-line', and
114 `delete-file-local-variable-prop-line'.
116 *** New commands for adding and removing directory-local variables,
117 and copying them to and from file-local variable lists:
118 `add-dir-local-variable', `delete-dir-local-variable',
119 `copy-dir-locals-to-file-locals',
120 `copy-dir-locals-to-file-locals-prop-line' and
121 `copy-file-locals-to-dir-locals'.
123 ** New coding system `utf-8-hfs' is available in
124 international/ucs-normalize.el. It is suitable for
125 default-file-name-coding-system on Mac OS X.
128 * Editing Changes in Emacs 23.2
132 *** If `select-active-regions' is t, any active region automatically
133 becomes the primary selection (for interaction with other window
134 applications). If you enable this, you might want to bind
135 `mouse-yank-primary' to Mouse-2.
137 *** When `save-interprogram-paste-before-kill' is non-nil, emacs will
138 not clobber the the interprogram paste when something is killed in it
139 by saving the former in the `kill-ring' before the latter.
141 ** When `kill-do-not-save-duplicates' is non-nil, identical subsequent
142 kills are not duplicated in the `kill-ring'.
145 ** The default value for `blink-matching-paren-distance' has been increased.
147 ** The new completion-style `initials' is available.
148 For instance, this can complete M-x lch to list-command-history.
150 ** Completions in the *Completions* buffer are sorted vertically
151 when the value of the new variable `completions-format' is `vertical'.
154 * Changes in Specialized Modes and Packages in Emacs 23.2
156 ** The bookmark menu has a narrowing search via bookmark-bmenu-search.
158 ** LaTeX mode now provides completion via latex-complete and
159 latex-indent-or-complete.
161 ** lucid.el and levents.el are now declared obsolete.
163 ** pcomplete provides a new command `pcomplete-std-completion' which
164 is similar to `pcomplete' but using the standard completion UI code.
166 ** .calc.el and .abbrev_defs obey user-emacs-directory.
168 ** Calc graphing commands (`g f' etc.) now work on MS-Windows,
169 if you have the native Windows port of Gnuplot version 3.8 or later
172 ** Calendar and diary
174 *** Fancy diary display is now the default.
175 If you prefer the simple display, customize `diary-display-function'.
177 *** The diary's fancy display now enables view-mode.
180 *** The command `calendar-current-date' accepts an optional argument
181 giving an offset from today.
185 *** The default value for `desktop-buffers-not-to-save' is nil.
186 This means Desktop will try restoring all buffers, when you restart
187 your Emacs session. Also, `desktop-buffers-not-to-save' is only
188 effective for buffers that have no associated file. If you want to
189 exempt buffers that do correspond to files, customize the value of
190 `desktop-files-not-to-save' instead.
192 ** FIXME mail-user-agent change
193 This probably affects a lot of documentation.
199 *** The new command `Info-virtual-index' bound to "I" displays a menu of
200 matched topics found in the index.
202 *** The new command `info-finder' replaces finder.el with a virtual Info
203 manual that generates an Info file which gives the same information
204 through a menu structure.
207 ** New connection methods in Tramp.
208 The new connection methods "rsyncc", "imap" and "imaps" have been
209 introduced. On systems which support GVFS-Fuse, Tramp offers also the
210 new connection methods "dav", "davs", "obex" and "synce".
212 ** nXML mode is now the default for editing XML files.
214 ** VC and related modes
216 *** When using C-x v v or C-x v i on a unregistered file that is in a
217 directory not controlled by any VCS, ask the user what VC backend to
218 use to create a repository, create a new repository and register the
221 *** FIXME: add info about the new VC functions: vc-root-diff and
222 vc-root-print-log once they stabilize.
224 *** The log functions (C-x v l and C-x v L) do not show the full log
225 by default anymore. The number of entries shown can be chosen
226 interactively with a prefix argument, by customizing
227 vc-log-show-limit. The log buffer display buttons that can be used
228 to change the number of entries shown.
229 RCS, SCCS, CVS and Git do not support this feature.
231 *** vc-annotate supports annotations through file copies and renames,
232 it displays the old names for the files and it can show logs/diffs for
233 the corresponding lines. Currently only Git and Mercurial take
234 advantage of this feature.
236 *** When a file is not found, VC will not try to check it out of RCS anymore.
238 *** Diff and log operations can be used from dired buffers.
242 **** The new variable vc-git-add-signoff can be used to add a
243 Signed-off-by line when committing.
245 **** Support for operating with stashes has been added to vc-dir: the stash list is
246 displayed in the *vc-dir* header, stashes can be created, removed and
247 their content displayed.
249 **** vc-dir displays the stash status
251 *** log-edit-strip-single-file-name controls whether or not single filenames
252 are stripped when copying text from the ChangeLog to the *VC-Log* buffer.
257 *** Elint now uses compilation-mode.
260 *** Elint can now scan individual files and whole directories,
261 and can be run in batch mode.
264 *** Elint does a more thorough initialization, and recognizes more built-in
265 functions and variables. Customize `elint-scan-preloaded' if you want
266 to sacrifice some accuracy for a faster startup.
269 *** Elint attempts some basic understanding of featurep and (f)boundp tests.
272 *** Customize `elint-ignored-warnings' to suppress some warnings.
276 *** The new command `async-shell-command' bound globally to `M-&' executes
277 the command asynchronously without the need to manually add ampersand to
278 the end of the command. Its output appears in the buffer `*Async Shell
282 *** Autorevert Tail mode now works now for remote files.
285 * New Modes and Packages in Emacs 23.2
287 ** htmlfontify.el turns a fontified Emacs buffer into an HTML page.
291 ** js.el is a new major mode for JavaScript files.
293 ** imap-hash.el is a new library to address IMAP mailboxes as hashtables.
296 * Incompatible Lisp Changes in Emacs 23.2
298 ** Several obsolete functions removed.
299 The functions have been obsolete since Emacs 19, and are unlikely to
302 time-stamp-month-dd-yyyy, time-stamp-dd/mm/yyyy, time-stamp-mon-dd-yyyy
303 time-stamp-dd-mon-yy, time-stamp-yy/mm/dd, time-stamp-yyyy/mm/dd,
304 time-stamp-yyyy-mm-dd, time-stamp-yymmdd, time-stamp-hh:mm:ss,
305 time-stamp-hhmm, baud-rate
308 ** Support for generating Emacs 18 compatible bytecode (by setting
309 the variable `byte-compile-compatibility') has been removed.
312 * Lisp changes in Emacs 23.2
314 ** New function `completion-in-region' to use the standard completion
315 facilities on a particular region of text.
317 ** The 4th arg to all-completions (aka hide-spaces) is declared obsolete.
319 ** read-file-name-predicate is obsolete. It was used to pass the predicate
320 to read-file-name-internal because read-file-name-internal abused its `pred'
321 argument to pass the current directory, but this hack is not needed
324 ** completion-base-size is obsoleted by completion-base-position.
325 This change causes a few backward incompatibilities, mostly with
326 choose-completion-string-functions where the `mini-p' argument has
327 been replaced by a `base-position' argument, and where the `base-size'
328 argument is now always nil.
330 ** called-interactively-p now takes one argument and replaces interactive-p
331 which is now marked obsolete.
332 ** New function set-advertised-calling-convention makes it possible
333 to obsolete arguments as well as make some arguments mandatory.
334 ** eval-next-after-load is obsolete.
335 ** New hook `after-load-functions' run after loading an Elisp file.
337 ** You can control which binding is preferentially shown in menus and
338 docstrings by adding a `:advertised-binding' property to the corresponding
339 command's symbol. That property can hold a single binding or a list
342 ** New macro with-silent-modifications to tweak text properties without
343 affecting the buffer's modification state.
344 ** All the default-FOO variables that hold the default value of the FOO
345 variable, are now declared obsolete.
347 ** read-key is a function halfway between read-event and read-key-sequence.
348 It reads a single key, but obeys input and escape sequence decoding.
350 ** start-process-shell-command and start-file-process-shell-command
351 now only take a single `command' argument.
353 ** The variable `process-file-side-effects' shall be bound to nil, if
354 a `process-file' call does not change a remote file. By this, file
355 name handlers like Tramp can apply optimizations.
357 ** Hash tables have a new printed representation that is readable.
358 The feature `hashtable-print-readable' identifies this new
361 ** Functions performing Unicode normalization are added. They are:
362 ucs-normalize-NFD-region, ucs-normalize-NFD-string,
363 ucs-normalize-NFC-region, ucs-normalize-NFC-string,
364 ucs-normalize-NFKD-region, ucs-normalize-NFKD-string,
365 ucs-normalize-NFKC-region, ucs-normalize-NFKC-string,
366 ucs-normalize-HFS-NFD-region, ucs-normalize-HFS-NFD-string,
367 ucs-normalize-HFS-NFC-region, ucs-normalize-HFS-NFC-string.
369 ** completion-annotate-function specifies how to compute annotations
370 for completions displayed in *Completions*.
373 ** Face aliases can now be marked as obsolete, using the macro
374 `define-obsolete-face-alias'.
377 ** Changing the file-names generated by byte-compilation by redefining
378 the function `byte-compile-dest-file' before loading bytecomp.el is obsolete.
379 Instead, customize byte-compile-dest-file-function.
382 ** `byte-compile-warnings' can have a new member, `constants'.
384 ** `delete-directory' has an optional parameter RECURSIVE.
386 ** New function `copy-directory', which copies a directory recursively.
389 ** New function `window-full-height-p', analogous to the full-width version.
392 * Changes in Emacs 23.2 on non-free operating systems
395 ** On MS-Windows, `display-time' now displays the system load average
396 as well as the time, as it does on GNU and Unix.
399 * Installation Changes in Emacs 23.1
401 ** The default X toolkit is now Gtk+, rather than Lucid.
402 The configure option `--with-gtk' has been removed. Gtk is now the
403 default toolkit, but you can use --with-x-toolkit=gtk if necessary.
406 Fonts are handled by new code capable of dealing with multiple font
407 backends. This uses the freetype and fontconfig libraries.
409 *** Emacs now accepts font names supplied in the fontconfig format
410 (e.g. "monospace-12:bold") and GTK format (e.g. "Monospace Bold 12").
412 *** Added support for local fonts (fonts installed on the machine
413 where Emacs is running).
415 *** Added support for the Xft library for antialiasing.
417 *** Added support for the otf library for complex text layout by
420 *** Added support for the m17n library for text shaping.
422 ** Changes to image support
424 *** configure now checks for libgif before libungif when searching for
427 *** Emacs now supports the SVG image format through librsvg2.
429 *** Emacs now supports multi-page TIFF images.
431 ** New NeXTSTEP-based port
432 This provides support for GNUstep (via the GNUstep libraries) and Mac
433 OS X (via the Cocoa libraries).
435 Specify --with-ns to configure for this. By default, a self-contained
436 app will be built (containing all lisp). To install/share lisp with
437 other emacsen (e.g. X11 build) use --disable-ns-self-contained. See
438 nextstep/README and nextstep/INSTALL in the Emacs source directory.
440 ** Mac OS X is no longer supported via Carbon.
441 Use the NeXTSTEP port, described above.
443 ** The new configuration option "--with-dbus" enables D-Bus language
446 ** Support for many obsolete platforms has been removed.
447 See the list at the end of etc/MACHINES for details.
449 *** Support for systems without alloca has been removed.
451 *** Support for Sun windows has been removed.
453 *** The `emacstool' utility has been removed.
455 ** The following platforms will be removed in a future Emacs version:
456 If you are still using Emacs on one of these platforms, please email
457 emacs-devel@gnu.org to inform the Emacs developers.
459 *** Old GNU/Linux systems based on libc version 5.
461 *** Old FreeBSD, NetBSD, and OpenBSD systems based on the COFF
464 *** Solaris versions 2.6 and below.
466 *** Solaris on IBM RS6000 machines.
468 *** UNIX System V (the original SysV, not later platforms based on it).
470 *** Unixware on non-x86 machines.
472 *** Platforms not supporting shared libraries (i.e., requiring the
473 NO_SHARED_LIBS compilation flag).
475 ** The configure options `--with-gcc', `--without-gcc' have been removed.
476 Configure will use gcc by default. Set the CC environment variable if
477 you need control over which C compiler is used.
479 ** The refcards are now shipped as PDF files.
481 ** The manuals are now licensed under the GNU Free Documentation License v1.3,
482 or any later version.
484 ** Emacs 23 comes with a new set of default icons.
485 Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png.
486 The Emacs 22 icon is available as `emacs22.png' in the same location.
488 * Changes in Emacs 23.1
490 ** Improved X Window System support
492 *** Emacs now supports using both X displays and ttys in one session.
493 With an Emacs server active (M-x server-start), `emacsclient -t'
494 creates a tty frame connected to the running emacs server. You can
495 use any number of different ttys. `emacsclient -c' creates a new X11
496 frame on the current $DISPLAY (or a tty frame if $DISPLAY is not set).
497 There may be problems if a display exits unexpectedly and Emacs is compiled
498 with Gtk+, see etc/PROBLEMS.
500 You can test for the presence of this feature in your Lisp code by
501 testing for the `multi-tty' feature.
503 *** Emacs starts in the background, as a daemon, when given the
504 --daemon command line argument. It disconnects from the terminal and
505 starts the server. Clients can connect and create graphical or
506 terminal frames using emacsclient.
508 **** emacsclient starts emacs in daemon mode and connects to it when
509 --alternate-editor="" is used (or when the evironment variable
510 ALTERNATE_EDITOR is set to "") and emacsclient cannot connect to an
513 *** The new command close-display-connection closes a connection to a
514 remote display. There are some bugs for Gtk+. See etc/PROBLEMS.
516 *** Emacs now supports the XEmbed specification.
517 You can embed Emacs in another application on X11. The new command line
518 option --parent-id is used to pass the parent window id to Emacs. See
519 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
520 for details about XEmbed.
522 *** Emacs can now set the frame opacity.
523 The opacity of a frame can be controlled by setting the `alpha' frame
524 parameter. This only takes effect on a compositing window manager for
525 the X Window System, such as Compiz, Beryl and Compiz Fusion, on Mac
526 OS X, or on Windows 2000 and later versions of Windows.
528 The alpha parameter should be an integer between 0 (transparent) and
529 100 (opaque), or a float number between 0.0 and 1.0. It can also be a
530 cons cell (ACTIVE . INACTIVE), where ACTIVE is the opacity of an
531 active frame and INACTIVE is the opacity of non-active frames.
533 The variable `frame-alpha-lower-limit' defines a lower bound for the
534 opacity; the default is 20.
536 ** Internationalization changes
538 *** The Emacs character set is now a superset of Unicode.
539 (It has about four times the code space, which should be plenty).
541 The internal encoding used for buffers and strings is now
542 Unicode-based and called `utf-8-emacs' (`emacs-internal' is an alias
543 for this). This encoding is backward-compatible with Unicode's UTF-8
544 encoding. The internal encoding previously used by Emacs,
545 `emacs-mule', is still available for reading and writing files.
547 During byte-compilation, Emacs 23 uses `utf-8-emacs' to write files.
548 As a result, byte-compiled files containing non-ASCII characters can't
549 be read by earlier versions of Emacs. Files compiled by Emacs 20, 21,
550 or 22 are loaded correctly as `emacs-mule' (whether or not they
551 contain multibyte characters). This takes somewhat more time, so it
552 may be worth recompiling existing .elc files which don't need to be
553 shared with older Emacsen.
555 *** There are new coding systems/aliases; see M-x list-coding-systems.
557 *** There is a new charset implementation with many new charsets.
558 See M-x list-character-sets. New charsets can be defined conveniently
559 as tables of unicodes.
561 *** There are new language environments for Chinese-GBK,
562 Chinese-GB18030, Khmer, Bengali, Punjabi, Gujarati, Oriya, Telugu,
563 Sinhala, and TaiViet.
565 *** The minor modes unify-8859-on-encoding-mode and
566 unify-8859-on-decoding-mode are obsolete.
568 *** `ucs-insert' is bound to `C-x 8 RET' and in addition to hex numbers
569 accepts numbers in hash notation (e.g. #o21430 for octal, or #10r8984 for
570 decimal). It also accepts Unicode character names with completion.
572 *** The `cyrillic-translit' input method supports many new characters.
573 Common typographical characters available from Unicode were added to
574 `cyrillic-translit': punctuation marks, accented characters, fractions,
577 ** Emacs now supports serial port access on GNU/Linux, Unix, and
578 Windows. The new command `serial-term' starts an interactive terminal
579 on a serial port. The serial port can be configured at runtime with
580 the mode-line mouse menu.
584 *** In the Options menu, the "Set Default Font" item applies the
585 selected font to the `default' face on all frames, not just the
586 current frame. Furthermore, if Emacs is compiled with both GTK and
587 Fontconfig support, the "Set Default Font" item uses the GTK font
588 selection dialog instead of an Emacs pop-up menu.
590 *** The font setting chosen by "Set Default Font" is saved if the
591 "Save Options" item is used.
593 *** The Tools menu contains a new Encryption/Decryption submenu.
594 This contains commands provided by EasyPG, the newly-included
595 interface to GnuPG (see New Modes and Packages).
597 *** In the Options menu, the "Truncate Long Lines in the Buffer" entry
598 has been replaced with a submenu offering three different ways to
599 handle long lines: truncation, continuation at the window edge, and
600 the new word wrapping behavior (see Editing Changes, below).
602 *** Improvements to menus for major and minor modes
603 More major and minor modes now have a mode specific menu, and existing
604 mode menus have been improved to include more functionality.
608 *** The mode-line displays a `@', instead of `-', if the
609 default-directory for the current buffer is on a remote machine.
611 *** The mode-line displays a mode menu when mouse-1 is clicked on a
612 minor mode, in the same way as it already did for major modes.
614 *** The `mode-line-emphasis' face is used to highlight certain
615 mode-line information (e.g. waiting for a VC command to finish).
617 *** The mode-line tooltips have been improved to provide more details.
619 *** The VC, line/colum number and minor mode indicators on the mode
620 line are now interactive: mouse-1 can be used on them to pop up a menu.
622 ** File deletion can make use of the Recycle Bin or system Trash folder.
623 Set `delete-by-moving-to-trash' non-nil to use this. Deleted files
624 and directories will then be sent to the Recycle Bin on Windows, and
625 to `trash-directory' on other systems.
627 ** Directory-local variables can now be defined.
628 By default, Emacs looks in .dir-locals.el for directory-local
629 variables. For more information, see `dir-locals-set-directory-class'
630 and `dir-locals-set-class-variables'.
632 ** Emacs can now use `auth-source' for authentication.
633 `smtpmail' and `url' (Tramp and Gnus also) use `auth-source' to obtain
634 login names and passwords. The match, if found, is reported
635 in *Messages* with the password blanked out.
637 ** `where-is-preferred-modifier' can specify your favorite modifier.
640 * Startup Changes in Emacs 23.1
642 ** The option `inhibit-startup-screen' (with aliases to old names
643 `inhibit-splash-screen' and `inhibit-startup-message') doesn't inhibit
644 display of the initial message in the *scratch* buffer. If you don't
645 want to display the initial message in the *scratch* buffer at startup,
646 you can set the option `initial-scratch-message' to nil.
648 ** New user option `initial-buffer-choice' specifies what to display
649 after starting Emacs: startup screen, *scratch* buffer, visiting a
652 ** New alias `argv' for `command-line-args-left'
653 This is a convenience alias, so that one can write `(pop argv)'
654 inside of --eval command line arguments in order to access
657 ** The abbrev file is no longer read at startup in batch mode.
659 ** Emacs now supports invocation by an X session manager.
660 It can save a session and restore it later. See the documentation of
661 the functions `emacs-session-save' and `emacs-session-restore'.
662 (Actually, this feature was introduced with Emacs 22, but it was not
665 * Incompatible Editing Changes in Emacs 23.1
667 ** In Dired, `dired-flag-garbage-files' is rebound from `&' to `%&'
668 on the regexp command prefix map.
670 ** In Dired-x, all command guesses for ! are now added to the default
671 list accessible by M-n instead of pushing all guesses temporarily into
674 ** In Isearch mode, a special case of typing `C-w' at the beginning of
675 the minibuffer that toggles word search (i.e. using key sequences
676 `C-s RET C-w' or `C-s M-e C-w') is obsolete. You can use the global key
677 `M-s w' to start word search, or type `M-s w' in Isearch mode to
678 toggle word search. To start nonincremental word search you can now use
679 `M-s w RET' and `M-s w C-r RET' instead of `C-s RET C-w' and `C-r RET C-w'.
681 ** In Info, `Info-search' is unbound from `M-s' to allow using `M-s w'
682 for word search as well as other search commands from the global prefix
683 key `M-s'. `Info-search' is still bound to `s', and also incremental
684 search commands `C-s', `C-M-s', `C-r', `C-M-r' are available for searching
685 through multiple Info nodes, together with their nonincremental versions
686 `C-s RET', `C-r RET', `C-M-s RET', `C-M-r RET', `M-s w RET'.
688 ** In Text mode, `center-line' and `center-paragraph' are rebound from
689 `M-s' and `M-S' to global keys `M-o M-s' and `M-o M-S' on the global
690 prefix map `M-o', which is intended for such formatting commands.
692 ** The following input methods were removed in Emacs 22.2, but this was
693 not advertised: danish-alt-postfix, esperanto-alt-postfix,
694 finnish-alt-postfix, german-alt-postfix, icelandic-alt-postfix,
695 norwegian-alt-postfix, scandinavian-alt-postfix, spanish-alt-postfix,
696 and swedish-alt-postfix. Use the versions without "alt-", which are
700 * Editing Changes in Emacs 23.1
702 ** The C-n and C-p line-motion commands now move by screen lines,
703 taking continued lines and variable-width characters into account.
704 Setting `line-move-visual' to nil reverts this to the previous
705 behavior (i.e., motion by logical lines based on buffer contents
708 ** C-x C-c now invokes `save-buffers-kill-terminal', and C-z now
709 invokes `suspend-frame'. These changes are for compatibility with the
710 new multi-tty support (see `Improved X Window System support' above).
714 *** Transient Mark mode is now on by default.
716 *** mark-even-if-inactive now defaults to t
718 *** When Transient Mark mode is on, C-SPC C-SPC pushes a mark without
721 *** When Transient Mark mode is on, M-q now fills the region if the
722 region is active. Otherwise, it fills the current paragraph.
724 *** When Transient Mark mode is on, M-$ now checks spelling of the
725 region if the region is active. Otherwise, it checks spelling of the
728 *** When Transient Mark mode is on, TAB now indents the region if the
731 *** The variable `use-empty-active-region' controls whether an empty
732 active region in Transient Mark mode should make commands operate on
735 ** Temporarily active regions
737 *** The new variable shift-select-mode, non-nil by default, controls
738 shift-selection. When Shift Select mode is on, shift-translated
739 motion keys (e.g. S-left and S-down) activate and extend a temporary
740 region, similar to mouse-selection.
742 *** Temporarily active regions, created using shift-selection or
743 mouse-selection, are not necessarily deactivated in the next command.
744 They are only deactivated after point motion commands that are not
745 shift-translated, or after commands that would ordinarily deactivate
746 the mark in Transient Mark mode (e.g., any command that modifies the
749 ** Minibuffer and completion changes
751 *** Emacs may ask for confirmation before opening a non-existent file
752 or buffer. By default, Emacs requests confirmation if you type RET
753 immediately after TAB, and the resulting input is not an existing file
754 or buffer; this usually happens when the minibuffer input did not
755 complete far enough and you entered RET by mistake. In that case,
756 Emacs puts the message "[Confirm]" in the minibuffer; type RET again
757 to create the file or buffer.
759 The new variable confirm-nonexistent-file-or-buffer determines whether
760 Emacs asks for confirmation. The default value is `after-completion'.
761 If you change it to t, Emacs always asks for confirmation; if you
762 change it to nil, Emacs never asks for confirmation.
764 *** The rules for performing completion have been changed.
765 When generating completion alternatives, Emacs now takes the
766 minibuffer text after point, if any, into account: this text is
767 treated as a substring of the remaining part of the completion
768 alternative (i.e., the part not matched by the minibuffer text before
769 point). If no completion alternatives are found this way, Emacs
770 attempts to perform partial-completion. If still no completion
771 alternatives are found, we fall back on the Emacs 22 rules for
772 performing completion.
774 The new variable `completion-styles' can be customized to choose your
775 favorite completion style.
777 *** When M-n in the minibuffer reaches the end of the list of defaults,
778 it adds the completion list to the end, so next M-n continues putting
779 completion items to the minibuffer. The same principle applies to
780 incremental search commands as well: C-s or C-M-s starts searching
781 the default values and after the end of defaults they continue
782 searching minibuffer completion items.
784 *** Minibuffer input of shell commands now comes with completion.
786 *** In the `C-x d' (Dired) prompt, typing M-n gives the visited file
787 name of the current buffer.
789 *** In the M-! (shell-command) prompt, M-n provides some default commands.
790 These are guessed using the file extension of the current file, based
791 on the file-handlers specified in the operating system's `mailcap'
792 file. The ! command in Dired (dired-do-shell-command) works
793 similarly, using the file displayed on the current line.
795 *** A list of regexp default values is available via M-n for `occur',
796 `keep-lines', `flush-lines' and `how-many'. This list includes the active
797 region in transient-mark-mode, the word under the cursor, the last Isearch
798 regexp, the last Isearch string and the last replacement regexp.
800 *** When enable-recursive-minibuffers is non-nil, operations which use
801 switch-to-buffer (such as C-x b and C-x C-f) do not fail any more when
802 used in a minibuffer or a dedicated window. Instead, they fallback on
803 using pop-to-buffer, which will use some other window. This change
804 has no effect when enable-recursive-minibuffers is nil (the default).
806 *** Isearch started in the minibuffer searches in the minibuffer history.
807 Reverse Isearch commands (C-r, C-M-r) search in previous minibuffer
808 history elements, and forward Isearch commands (C-s, C-M-s) search in
809 next history elements. When the reverse search reaches the first history
810 element, it wraps to the last history element, and the forward search
811 wraps to the first history element. When the search is terminated, the
812 history element containing the search string becomes the current.
814 *** The variable read-file-name-completion-ignore-case overrides
815 completion-ignore-case for file name completion.
817 *** The variable read-buffer-completion-ignore-case overrides
818 completion-ignore-case for buffer name completion.
820 *** The new command `minibuffer-force-complete' chooses one of the
821 possible completions, rather than stopping at the common prefix.
823 *** If `completion-auto-help' is `lazy', Emacs shows the completions
824 buffer only on the second attempt to complete. This was already
825 supported in `partial-completion-mode'.
829 *** S-down-mouse-1 now pops up a menu for changing the font and text
830 size of the default face in the current buffer. The face is changed
831 via face remapping (see Lisp changes, below).
833 *** New commands to change the default face size in the current buffer.
834 To increase it, type `C-x C-+' or `C-x C-='. To decrease it, type
835 `C-x C--'. To restore the default (global) face size, type `C-x C-0'.
836 These work via Text Scale mode, a new minor mode.
838 The final key in the above commands may be repeated without the
839 leading `C-x', e.g. `C-x C-= C-= C-=' increases the face height by
840 three steps. Each step scales the height of the default face by the
841 value of the variable `text-scale-mode-step'.
843 *** The commands buffer-face-mode and buffer-face-set can be used to
844 remap the default face in the current buffer. See "Buffer Face mode",
845 under New Modes and Packages.
847 ** Primary selection changes
849 *** You can disable kill ring commands from accessing the primary
850 selection by setting `x-select-enable-primary' to nil.
852 ** Continuation lines can now be wrapped at word boundaries
853 (word-wrapping). This is controlled by the new per-buffer variable
854 `word-wrap'. Word wrapping does not take place if continuation lines
855 are not shown, e.g. if truncate-lines is non-nil. The most convenient
856 way to enable word-wrapping is using the new minor mode Visual Line
857 mode; in addition to setting `word-wrap' to t, this rebinds some
858 editing commands to work on screen lines rather than text lines. See
859 New Modes and Packages, below.
861 ** Window management changes
863 *** truncate-partial-width-windows now accepts integer values, which
864 specify a minimum window width for partial-width windows, below which
865 lines are truncated. The default has been changed to 50.
867 *** The new command balance-windows-area balances windows both
868 vertically and horizontally.
870 *** pop-to-buffer now always sets input focus when the popped-to window
871 is on a different frame.
873 ** Miscellaneous changes:
875 *** C-l is bound to the new command recenter-top-bottom, rather than recenter.
876 This moves the current line to window center, top and bottom on
877 successive invocations.
879 *** scroll-preserve-screen-position also preserves the column position.
881 *** If `yank-pop-change-selection' is t, rotating the kill ring also
882 updates the selection or clipboard to the current yank, just as M-w
883 would do so with the text it copies to the kill ring.
885 *** C-M-% now shows replacement as it would look in the buffer, with
886 `\N' and `\&' substituted according to the match. Old behavior can be
887 restored by customizing `query-replace-show-replacement'.
889 *** The command shell prompts for the default directory, when it is
890 called with a prefix and the default directory is a remote file name.
891 This is because some file name handlers (like ange-ftp) are not able to
892 run processes remotely.
894 *** The new command kill-matching-buffers kills buffers whose name
897 *** The value of comment-style now defaults to `indent'.
898 Thefore, comment-start markers are inserted at the current indentation
899 of the region to comment, rather than the leftmost column.
901 *** The new commands `pp-macroexpand-expression' and
902 `pp-macroexpand-last-sexp' pretty-print macro expansions.
904 *** The new command `set-file-modes' allows to set file's mode bits.
905 The mode bits can be specified in symbolic notation, like with GNU
906 Coreutils, in addition to an octal number. `chmod' is a new
907 convenience alias for this function.
909 *** `next-error-recenter' specifies how next-error should recenter the
910 visited source file. Its value can be a number (for example, 0 for
911 top line, -1 for bottom line), or nil for no recentering.
913 *** When typing in a password in the echo area, C-y yanks the current
914 kill into the password.
916 *** Tooltip frame parameters `font' and `color' in `tooltip-frame-parameters'
917 are ignored. Customize the `tooltip' face instead.
919 *** `mkdir' is a new convenience alias for `make-directory'.
921 * New Modes and Packages in Emacs 23.1
923 ** Auto Composition Mode is a minor mode that composes characters
924 automatically when they are displayed. It is globally on by default.
925 It uses `auto-composition-function' (default `auto-compose-chars').
927 ** Bubbles, a new game, is similar to SameGame.
929 ** Buffer Face mode is a minor mode for remapping the default face in
930 the current buffer. The variable `buffer-face-mode-face' specifies
931 the face to remap to. The command `buffer-face-set' prompts for a
932 face name, sets `buffer-face-mode-face' to it, and enables
933 buffer-face-mode. See "Face changes", under Editing Changes, for a
934 description of face remapping.
936 ** butterfly flips the desired bit on the drive platter.
937 See http://xkcd.com/378/
939 ** bug-reference.el provides clickable links to bug reports.
941 ** dbus.el provides D-Bus language bindings.
942 D-Bus is an inter-process communication mechanism for applications
943 residing on the same host. See the manual for details.
945 ** DocView mode allows viewing of PDF, PostScript and DVI documents.
946 One can also search for a regular expression in the document. For
947 details, see the commentary in doc-view.el.
949 PDF and DVI files are now opened in Doc View mode by default.
951 In Postcript mode, C-c C-c launches Doc View minor mode for viewing
954 ** EasyPG provides an interface to the GNU Privacy Guard (GnuPG).
955 It includes a GnuPG keyring browser, cryptographic operations on
956 regions and files, and automatic encryption of *.gpg files. For
957 details, see the EasyPG Assistant User's Manual.
959 ** json.el is a library for parsing and generating JSON
960 (JavaScript Object Notation), a lightweight data-interchange format.
962 ** linum.el is a new minor mode to display line numbers for the
965 ** mairix.el is an interface to mairix, a free tool for indexing and
966 searching locally stored mail. It allows you to query mairix and
967 display the search results with Rmail, Gnus and VM. Note that there
968 is an existing Gnus back end, nnmairix.el, which should be used with
971 ** minibuffer-depth-indicate-mode shows the minibuffer depth in the prompt.
974 This is a new mode for editing XML documents. It allows a schema to
975 be associated with the XML document being edited, using Relax NG as
976 the schema language. The schema is used to provide two key features:
978 *** Continuous validation. nXML validates as you type, highlighting
979 any invalid parts of your document.
981 *** Completion. nXML can assist you in entering an element name,
982 attribute name or data value by using information about what is
983 allowed by the schema in that context.
985 ** proced.el provides a Dired-like interface for operating on
986 processes. Proced makes an Emacs buffer containing a listing of the
987 current processes. You can use the normal Emacs commands to move
988 around in this buffer, and special Proced commands to operate on the
989 processes listed. It is currently only functional on GNU/Linux,
990 MS-Windows and Solaris.
992 ** Remember Mode is a mode for jotting down things to remember.
993 Notes can be saved to a Diary file. For details, see the Remember
996 ** RST mode is a major mode for editing reStructuredText files.
998 ** Ruby mode is a major mode for Ruby files.
1000 ** Visual Line mode provides support for editing by visual lines.
1001 It turns on word-wrapping in the current buffer, and rebinds C-a, C-e,
1002 and C-k to commands that operate by visual lines instead of logical
1003 lines. This is a more reliable replacement for longlines-mode.
1004 This can also be turned on using the menu bar, via
1005 Options -> Line Wrapping in this Buffer -> Word Wrap
1007 ** xesam.el is an implementation of Xesam, an interface to (desktop)
1008 search engines like Beagle, Strigi, and Tracker. The Xesam API
1009 requires D-Bus for communication.
1011 ** zeroconf.el offers service discovery and service publishing
1012 interfaces according to the zeroconf specification. It communicates
1013 with Avahi, a zeroconf implementation, via D-Bus messages on systems
1014 which have installed this software.
1016 ** There is a new `whitespace' package.
1017 (The pre-existing one has been renamed to `old-whitespace'.)
1018 Now, besides reporting bogus blanks, the whitespace package has a
1019 minor mode and a global minor mode to visualize blanks (TAB, (HARD)
1020 SPACE and NEWLINE). The visualization is made via faces and/or display
1021 table. It can also indicate lines that extend beyond a given column,
1022 trailing blanks, and empty lines at the start or end of a buffer.
1023 See `whitespace-style' for more details. The `whitespace-action' option
1024 specifies what to do when a buffer is visited, killed, or written.
1027 * Changes in Specialized Modes and Packages in Emacs 23.1
1029 ** Abbrev has been rewritten in Elisp and extended with more flexibility.
1031 *** New functions: abbrev-get, abbrev-put, abbrev-table-get, abbrev-table-put,
1032 abbrev-table-p, abbrev-insert, abbrev-table-menu.
1034 *** Special hook `abbrev-expand-functions' obsoletes `pre-abbrev-expand-hook'.
1036 *** `make-abbrev-table', `define-abbrev', `define-abbrev-table' all take
1037 extra arguments for arbitrary properties.
1039 *** New variable `abbrev-minor-mode-table-alist'.
1041 *** `local-abbrev-table' can hold a list of abbrev-tables.
1043 *** Abbrevs have now the following special properties:
1044 `:count', `:system', `:enable-function', `:case-fixed'.
1046 *** Abbrev-tables have now the following special properties:
1047 `:parents', `:case-fixed', `:enable-function', `:regexp',
1048 `abbrev-table-modiff'.
1052 *** `apropos-library' describes the elements defined in a given library.
1054 *** Set `apropos-compact-layout' is you want a more compact (but wider) layout.
1056 ** Archive Mode has basic support to browse Rar archives.
1057 Note, however, that the free version of the unrar command only handles
1058 versions 1 and 2 of the Rar format.
1062 *** New command `bibtex-initialize' (re)initializes BibTeX buffers.
1064 *** New `bibtex-entry-format' options `whitespace', `braces', and
1065 `string', disabled by default.
1067 *** New variable `bibtex-cite-matcher-alist' contains rules to
1068 identify cited keys in BibTeX entries, used by `bibtex-find-crossref'.
1070 *** Command `bibtex-url' allows multiple URLs per entry.
1074 *** bookmark.el saves bookmarks in a pre-Emacs-23-incompatible file format
1075 bookmark.el can read a .emacs.bmk file saved by an older Emacs, but an
1076 older Emacs cannot read one saved by Emacs 23.
1078 ** Calendar and diary
1080 *** There is a new date style, `iso', essentially year/month/day.
1081 The variable `european-calendar-style' is obsolete - use `calendar-date-style'.
1082 Similarly, the commands `american-calendar' and `european-calendar'
1083 should be replaced by `calendar-set-date-style'.
1085 *** The calendar namespace has been rationalized.
1086 All functions and variables now begin with a `calendar-', `diary-', or
1087 `holiday-' prefix. The various calendar systems have secondary
1088 prefixes, eg `calendar-french-'. The old names you are likely to use
1089 directly still exist, for the time being, as aliases, but please start
1090 using the new names.
1092 *** The whitespace in the calendar layout can be customized.
1094 calendar-left-margin, calendar-intermonth-spacing, calendar-column-width,
1095 calendar-day-header-width, and calendar-day-digit-width.
1097 *** Text (e.g. ISO weeks) can be displayed between the calendar months.
1098 See the variables calendar-intermonth-header and calendar-intermonth-text.
1100 *** The function `holiday-chinese' computes holidays on the Chinese calendar.
1101 It has been used to add items to the list `holiday-oriental-holidays'.
1103 *** `diary-remind' accepts a negative number -DAYS as a shorthand for
1104 the list (1 2 ... DAYS).
1108 *** The new command C-c C-f (change-log-find-file) finds the file
1109 associated with the current log entry.
1111 *** The new command C-c C-c (change-log-goto-source) goes to the
1112 source code associated with a log entry.
1114 ** Compile and grep modes
1116 *** The mode-line entry for the *compilation* and *grep* buffer is color coded.
1117 It has different colors for to show that: (a) the command is still
1118 running, (b) successful completion, (c) error.
1120 *** compilation-auto-jump-to-first-error tells `compile' to jump to
1121 the first error encountered during compilations.
1123 *** compilation-scroll-output accepts a new value, `first-error', which
1124 says to stop auto scrolling at the first error that occurs.
1126 *** The `cc' alias for C++ files in `grep-file-aliases' has been
1127 improved. `hh' can be used to match C++ header files and `cchh' both
1128 C++ sources and headers.
1132 *** You can specify your copyright holders' names.
1133 Only copyright lines with holders matching `copyright-names-regexp' are
1134 considered for update.
1136 *** Copyrights can be at the end of the buffer.
1137 This is controlled by `copyright-at-end-flag' (used by, e.g., change-log-mode).
1141 *** defcustom accepts new keyword arguments, `:safe' and `:risky', which
1142 set a variable's `safe-local-variable' and `risky-local-variable' property.
1146 *** diff-refine-hunk highlights word-level details of changes in a diff hunk.
1147 It's used automatically as you move through hunks, see
1148 diff-auto-refine-mode. It is bound to `C-c C-b'.
1150 *** diff-add-change-log-entries-other-window iterates through the diff
1151 buffer and tries to create ChangeLog entries for each change.
1152 It is bound to `C-x 4 A'.
1154 *** Turning on `whitespace-mode' in a diff buffer will show trailing
1155 whitespace problems in the modified lines.
1159 *** In Dired, C-x C-q now runs the command wdired-change-to-wdired-mode,
1160 and C-x C-q in wdired-mode exits it with asking a question about
1163 *** `&' runs the command `dired-do-async-shell-command' that executes
1164 the command asynchronously without the need to manually add ampersand
1165 to the end of the command. Its output appears in the buffer `*Async Shell
1168 *** `M-s f C-s' and `M-s f M-C-s' run Isearch that matches only at file names.
1169 When a new user option `dired-isearch-filenames' is t, then even ordinary
1170 Isearch started with `C-s' and `C-M-s' matches only at file names in the
1171 Dired buffer. When `dired-isearch-filenames' is `dwim' then activation of
1172 file name Isearch depends on the position of point - if point is on a file
1173 name initially, then Isearch matches only file names, otherwise it matches
1174 everywhere in the Dired buffer. You can toggle file names matching on or
1175 off by typing `M-s f' in Isearch mode.
1177 *** `M-s a C-s' and `M-s a M-C-s' run multi-file Isearch on the marked files.
1178 They visit the first marked file in the sequence and display the usual Isearch
1179 prompt for a string or a regexp where all Isearch commands are available.
1181 *** `Q' in Dired provides two new keys for multi-file replacement.
1182 The upper case key `Y' replaces all remaining matches in all remaining files
1183 with no more questions. The upper case key `N' stops doing replacements
1184 in the current file and skips to the next file. These multi-file keys
1185 are available for all commands that use `tags-query-replace'
1186 including `dired-do-query-replace-regexp', `vc-dir-query-replace-regexp',
1187 `reftex-query-replace-document'.
1191 *** The line length of fixed-form Fortran is not fixed at 72 any more.
1192 Customize the variable `fortran-line-length' to change it.
1194 *** In Fortran mode, M-; is now bound to the standard comment-dwim,
1195 rather than fortran-indent-comment.
1197 *** (The increasingly misnamed) F90 mode supports Fortran 2003 syntax.
1201 *** The Gnus package has been updated
1202 There are many news features, bug fixes and improvements; see the file
1203 GNUS-NEWS or the node "No Gnus" in the Gnus manual for details.
1205 *** In Emacs 23, Gnus uses Emacs' new internal coding system `utf-8-emacs' for
1206 saving articles drafts and ~/.newsrc.eld. These file may not be read
1207 correctly in Emacs 22 and below. If you want to Gnus across different Emacs
1208 versions, you may set `mm-auto-save-coding-system' to `emacs-mule'.
1210 *** Passwords are consistently loaded through `auth-source'
1211 Gnus can use `auth-source' for POP and IMAP passwords. Also see that
1212 `smtpmail' and `url' support `auth-source' for SMTP and HTTP/HTTPS/RSS
1213 authentication respectively.
1217 *** New macro `with-help-window' should set up help windows better
1218 than `with-output-to-temp-buffer' with `print-help-return-message'.
1220 *** New option `help-window-select' permits to customize whether help
1221 window shall be automatically selected when invoking help.
1223 *** New variable `help-window-point-marker' permits one to specify a new
1224 position for point in help window (for example in `view-lossage').
1228 *** New command `isearch-forward-word' bound globally to `M-s w' starts
1229 incremental word search. New command `isearch-toggle-word' bound to the
1230 same key `M-s w' in Isearch mode toggles word searching on or off
1231 while Isearch is active.
1233 *** New command `isearch-highlight-regexp' bound to `M-s h r' in Isearch
1234 mode runs `highlight-regexp' (`hi-lock-face-buffer') with the current
1235 search string as its regexp argument. The same key `M-s h r' and
1236 other keys on the `M-s h' prefix are bound globally to the command
1237 `highlight-regexp' and other hi-lock commands.
1239 *** New command `isearch-occur' bound to `M-s o' in Isearch mode
1240 runs `occur' with the current search string. The same key `M-s o'
1241 is bound globally to the command `occur'.
1243 *** Isearch can now search through multiple ChangeLog files.
1244 When running Isearch in a ChangeLog file, if the search fails,
1245 then another C-s tries searching the previous ChangeLog,
1246 if there is one (e.g. going from ChangeLog to ChangeLog.12).
1247 This is enabled if multi-isearch-search is non-nil.
1249 *** Two new commands to start Isearch on a list of marked buffers
1250 for buff-menu.el and ibuffer.el are bound to the keys `M-s a C-s' and
1253 *** The part of an Isearch that failed to match is highlighted in
1254 `isearch-fail' face.
1256 *** `C-h C-h' in Isearch mode displays isearch-specific Help screen,
1257 `C-h b' displays all Isearch key bindings, `C-h k' displays the full
1258 documentation of the given Isearch key sequence, `C-h m' displays
1259 documentation of Isearch mode. All the rest Help commands exit Isearch mode
1260 and execute their global definitions.
1262 *** When started in the minibuffer, Isearch searches in the minibuffer
1263 history. See `Minibuffer changes', above.
1267 *** Upgraded to MH-E version 8.2. See MH-E-NEWS for details.
1270 *** The file etc/emacs.py now supports both Python 2 and 3, meaning
1271 that either version can be used as inferior Python by python.el.
1273 *** Python mode now has `pdbtrack' functionality. When using pdb to
1274 debug a Python program, pdbtrack notices the pdb prompt and displays
1275 the source file and line that the program is stopped at, much the same
1276 way as gud-mode does for debugging C programs with gdb.
1280 *** The default value of `recentf-keep' prevents from checking of
1281 remote files, if there is no established connection to the
1282 corresponding remote host.
1286 *** Rmail no longer converts the messages to Babyl format.
1287 Instead, it uses UNIX mbox format, both on disk and in Rmail buffers,
1288 and does conversion and decoding when a message is displayed.
1290 The first time you visit an Rmail file in Babyl format, Rmail
1291 automatically converts it to mbox format. This is a one-time
1292 conversion, but it can take a few minutes, depending on how fast is
1293 your machine and on the size of the file. You should find the rest of
1294 Rmail usage unaltered.
1296 However, M-x set-rmail-inbox-list now lasts only for one session
1297 because there is no way to save the list of inbox files in an
1300 Also, whereas with Babyl format M-x find-file would switch to Rmail
1301 mode, with mbox format this is no longer the case (there being no way
1302 to add an "-*- rmail-*-" cookie to an mbox file). Use C-u M-x rmail
1305 If you have written any extensions to Rmail, they are likely to need
1306 updating. Conceptually, the Rmail buffer that you see is no longer
1307 just a narrowed portion of the whole. So you cannot access the whole
1308 of a message (or message collection) by a simple save-restriction and
1309 widen. Instead, there are two buffers: the rmail-buffer, and the
1310 rmail-view-buffer. The former is the buffer that you see, the latter
1311 is invisible. Most of the time, the invisible `view' buffer contains
1312 the full contents of the Rmail file, and the Rmail buffer contains a
1313 decoded copy of the current message (with only a subset of the
1314 headers). In this state, Rmail is said to be `swapped'.
1316 You may find the following functions useful:
1318 `rmail-get-header' and `rmail-set-header' get or set the value of a
1319 message header, whether or not it is currently visible.
1321 `rmail-apply-in-message' is a general purpose function that calls a
1322 function (with arguments) which you specify on the full text of a given
1323 message. To further narrow to just the headers, search forward for "\n\n".
1325 *** The new command `rmail-mime' displays MIME messages.
1326 It is bound to `v' in Rmail buffers and summaries. It displays plain
1327 text and multipart messages in a temporary buffer, and offers buttons
1328 to save attachments.
1330 *** The command `rmail-redecode-body' no longer accepts the optional arg RAW.
1331 Since Rmail now holds messages in their original undecoded form in a
1332 separate buffer, `rmail-redecode-body' no longer encodes the original
1333 message, and therefore there should be no need to avoid encoding it.
1335 *** The o command is now `rmail-output'. It is an all-purpose command
1336 for copying messages from Rmail and appending them to files. It
1337 handles Babyl-format files as well as mbox-format files, and it
1338 handles both kinds properly when they are visited in Emacs. It always
1339 copies the full headers of the message.
1341 *** The C-o command is now `rmail-output-as-seen'. It uses
1342 the message as displayed, appending it to an mbox file.
1344 *** The modified status of the Rmail buffer is reported in the mode-line.
1345 Previously, this information was hidden.
1349 *** New option latex-indent-within-escaped-parens
1350 permits to customize indentation of LaTeX environments delimited
1355 *** If the gpm mouse server is running and t-mouse-mode is enabled,
1356 Emacs uses a Unix socket in a GNU/Linux console to talk to server,
1357 rather than faking events using the client program mev. This C level
1358 approach provides mouse highlighting and help echoing in the
1363 *** New connection methods.
1364 The new methods "plinkx", "plink2", "psftp", "sftp" and "fish" have
1365 been introduced. There are also new so-called gateway methods
1366 "tunnel" and "socks".
1369 IPv6 addresses are supported now as host names. They must be embedded
1370 in square brackets, like in "/ssh:[::1]:".
1372 *** Multihop syntax has been removed.
1373 The pseudo-method "multi" has been removed. Instead, multi hops
1374 can be specified by the new variable `tramp-default-proxies-alist'.
1376 *** More default settings.
1377 Default values can be set via the variables `tramp-default-user',
1378 `tramp-default-user-alist' and `tramp-default-host'.
1380 *** Connection information is cached.
1381 In order to reduce connection setup, information about used
1382 connections is kept persistently in a file. The name of this file is
1383 defined in the variable `tramp-persistency-file-name'.
1385 *** Control of remote processes.
1386 Running processes on a remote host can be controlled by settings in
1387 `tramp-remote-path' and `tramp-remote-process-environment'.
1389 *** Success of remote copy is checked.
1390 When the variable `file-precious-flag' is set, the success of a remote
1391 file copy is checked via the file's checksum.
1393 *** Passwords can be read from an authentification file.
1394 Tramp uses the package `auth-source' to read passwords from a file, if
1397 ** VC and related modes
1399 *** VC now supports applying VC operations to a set of files at a time.
1400 This enables VC to work much more effectively with changeset-oriented
1401 version-control systems such as Subversion, GNU Arch, Mercurial, Git
1402 and Bzr. VC will now pass a multiple-file commit to these systems as
1405 *** vc-dir is a new command that displays file names and their VC
1406 status. It allows to apply various VC operations to a file, a
1407 directory or a set of files/directories.
1409 *** VC switches are no longer appended, rather the first non-nil value is used.
1410 (This was for the most part true in Emacs 22, but was not advertised).
1411 This is because there is an increasing variety of VC systems, and they
1412 do not all accept the same "common" options. For example, a CVS diff
1413 command used to append the values of `vc-cvs-diff-switches',
1414 `vc-diff-switches', and `diff-switches'. Now the first non-nil value
1415 from that sequence is used. The special value `t' means "no switches".
1417 *** Clicking on the VC mode-line entry now pops the VC menu.
1419 *** The VC mode-line entry now has a tooltip that explains the VC file status.
1421 *** In VC Annotate mode, the key bindings have changed to use lower
1422 case keys instead of the upper case keys used in the past.
1424 *** In VC Annotate mode, for VC systems that support changesets, you can
1425 see the diff for the whole changeset (not only for the current file)
1426 by typing the D key. Using the "Show changeset diff of revision at
1427 line" menu entry does the same thing.
1429 *** In VC Annotate mode, you can type v to toggle the annotation visibility.
1431 *** In VC Annotate mode, you can type f to show the file revision on
1434 *** Asynchronous VC commands display [Waiting...] in the mode-line
1435 of the corresponding buffer as long as the asynchronous process is
1438 *** Log entries can be modified using the key "e" in log-view.
1439 For now only CVS, RCS, SCCS and SVN support this functionality.
1440 This is done by the `modify-change-comment' backend function.
1442 *** In log-view-mode, for VC systems that support changesets, you can
1443 see the diff for the whole changeset (not only for the current file)
1444 by typing the D key or using the "Changeset Diff" menu entry.
1446 *** In Log Edit mode, C-c C-d now shows the diff for the files involved.
1448 *** vc-git supports the "git grep" command.
1450 *** VC Support for Meta-CVS has been removed for lack of a maintainer able
1451 to update it to the new VC.
1455 *** comint-mode uses `start-file-process' now (see Lisp Changes).
1456 If `default-directory' is a remote file name, subprocesses are started
1457 on the corresponding remote system.
1459 *** Eldoc highlights the function argument under point
1460 with the face `eldoc-highlight-function-argument'.
1462 *** In Etags, the --members option is now the default.
1463 Use --no-members if you want the old default behavior of not tagging
1464 struct members in C, members variables in C++ and variables in PHP.
1466 *** The `gdb' command only works with the graphical interface now.
1467 Use `gud-gdb' if you want the (old) text command mode.
1469 *** goto-address.el provides two new minor modes, goto-address-mode and
1470 goto-address-prog-mode, which buttonize URLS and email addresses.
1472 *** The new command `eshell/info' runs info in an eshell buffer.
1474 *** The new variable `ffap-rfc-directories' specifies a list of local
1475 directories in which `ffap-rfc' will first search for RFCs.
1477 *** hide-ifdef-mode allows shadowing ifdef-blocks instead of hiding them.
1478 See option `hide-ifdef-shadow' and function `hide-ifdef-toggle-shadowing'.
1480 *** `icomplete-prospects-height' now supercedes `icomplete-prospects-length'.
1482 *** Info displays breadcrumbs in the header of the page.
1483 See Info-breadcrumbs-depth to control it.
1485 *** net-utils has an `iwconfig' command, similar to the existing `ifconfig'.
1486 It is used to configure wireless interfaces.
1488 *** The pcmpl-unix package supports hostname completion for ssh and scp.
1490 *** sgml-electric-tag-pair-mode lets you simultaneously edit matched tag pairs.
1492 *** smerge-refine highlights word-level details of changes in conflict.
1493 It's used automatically as you move through conflicts, see
1494 smerge-auto-refine-mode.
1496 *** talk.el has been extended for multiple tty support.
1498 *** A new command `display-time-world' has been added to the Time
1499 package. It creates a buffer with an updating time display using
1502 *** The appearance of superscript and subscript in TeX is more customizable.
1503 See the documentation of the variables: tex-fontify-script,
1504 tex-font-script-display, tex-suscript-height-ratio, and
1505 tex-suscript-height-minimum.
1507 *** view-remove-frame-by-deleting is now by default t
1508 since users found iconification of view-mode frames distracting.
1510 *** WoMan tries to add locale-specific manual page directories to the
1511 search path. This can be disabled by setting `woman-locale' to nil.
1514 * Changes in Emacs 23.1 on non-free operating systems
1516 ** Case is now considered significant in completion on MS-Windows.
1517 The default value of `completion-ignore-case' is now nil on
1518 MS-Windows, the same as it is for other operating systems. The
1519 variable doesn't apply to reading a file name -- in that case Emacs
1520 heeds `read-file-name-completion-ignore-case' instead.
1522 ** IPv6 is supported on MS-Windows.
1523 Emacs now supports IPv6 on Windows XP and later, and earlier versions
1524 of Windows with third party IPv6 stacks installed. In Emacs 22, IPv6 was
1525 supported on other platforms, but not on Windows due to using the winsock
1526 1.1 header file, even though Emacs was linking to the winsock 2 library.
1528 ** Busy cursor (hourglass) now displays on MS-Windows.
1529 When Emacs is busy, an hourglass mouse cursor is displayed on Windows.
1530 In Emacs 22 only X supported the busy cursor.
1532 ** Battery status is available on MS-Windows
1533 Emacs can now display the battery status in the mode-line when enabled with
1534 display-battery-mode or from the Options menu. More verbose battery
1535 information is also available with the command `battery'. In Emacs 22
1536 battery status was supported only on GNU/Linux and Mac.
1538 ** More keys available on MS-Windows.
1539 Keys normally associated with IMEs, and some exotic keys not normally found
1540 on standard keyboards have been given names so they can be bound to functions
1541 inside Emacs. If there are keys on your keyboard that have not been exposed
1542 to Emacs in the past, try C-h k to see if they are available now.
1544 Emacs can now bind functions to the extra buttons for media player and
1545 browser control present on some keyboards. These buttons are disabled
1546 by default, since enabling them prevents their system-wide use when
1547 Emacs has focus. To enable them, set the variable
1548 w32-pass-multimedia-buttons to nil. See the doc string of that variable
1549 for the list of extra keys that are available.
1551 ** BDF fonts no longer supported on MS-Windows.
1552 The font backend was completely rewritten for this release. The focus
1553 on Windows has been getting acceptable performance and full unicode
1554 support, including complex script shaping for native Windows fonts. A
1555 rewrite of the BDF font support has not happened due to lack of time
1556 and developers. If demand still exists for such a backend even with
1557 the improved language support for native Windows fonts, future
1558 development in this direction will most likely be based on the
1559 freetype library, giving access to a wider range of font formats.
1562 * Incompatible Lisp Changes in Emacs 23.1
1564 ** Variables cannot be both buffer-local and frame-local any more.
1566 ** `functionp' returns nil for special forms.
1567 I.e., it only returns t for objects that can be passed to `funcall'.
1569 ** The behavior of map-char-table has changed. It may call the
1570 specified function with a cons (FROM . TO) as a key if characters in
1571 that range have the same value.
1575 *** The function `dired-call-process' has been removed.
1577 *** The multibyteness of process filters is now determined by the
1578 coding-system used for decoding. The functions
1579 `process-filter-multibyte-p' and `set-process-filter-multibyte' are
1582 ** The variable `byte-compile-warnings' can now be a list starting with `not',
1583 meaning to disable the specified warnings. The meaning of this list
1584 may therefore be the reverse of what you expect (of course, this is
1585 only an issue if you make use of the new `not' syntax). Rather than
1586 checking/manipulating elements directly, use the new functions
1587 `byte-compile-warning-enabled-p', `byte-compile-disable-warning', and
1588 `byte-compile-enable-warning.'
1590 ** `mode-name' is no longer guaranteed to be a string.
1591 Use `(format-mode-line mode-name)' to ensure a string value.
1593 ** The function x-font-family-list has been removed.
1594 Use the new function font-family-list (see Lisp Changes, below).
1596 ** Internationalization changes
1598 *** The value of the function `charset-id' is now always 0.
1600 *** The functions `register-char-codings' and `coding-system-spec'
1603 *** The cpXXX coding systems are now supported automatically.
1604 The functions cp-...-codepage, which you had to use in Emacs 22 to
1605 enable support for these coding systems, have been deleted.
1607 *** The following features have been removed. They were used for
1608 displaying various scripts with specific fonts, and are no longer
1609 needed now that OpenType font support is available:
1611 **** `devanagari' and `devan-util', and all associated devanagari-* and
1612 dev-* functions and variables (formerly used for Devanagari script).
1614 **** `kannada' and `knd-util', and all associated kannada-* and knd-*
1615 functions and variables (formerly used for Kannada script).
1617 **** `malayalam' and `mlm-util', and all associated malayalam-* and
1618 mlm-* functions and variables (formerly used for Malayalam script).
1620 **** `tamil' and `tml-util, and all associated tamil-* and tml-*
1621 functions and variables (formerly used for Tamil script).
1623 *** The meaning of NAME argument of `set-fontset-font' is changed.
1624 Previously nil is accepted as the default fontset. Now, nil is for
1625 the fontset of the selected frame and t is for the default fontset.
1627 *** The meaning of FONTSET argument of `print-fontset' is changed.
1628 Now, nil is for the fontset of the selected frame and t is for the
1631 ** If a function in write-region-annotate-functions returns with a
1632 different buffer current, Emacs no longer kills that buffer
1633 automatically. This behavior existed in previous versions of Emacs,
1634 but was undocumented. To kill a buffer after write-region, give the
1635 variable `write-region-post-annotation-function' a buffer-local value
1638 ** The variable temp-file-name-pattern has been removed.
1639 This variable was only used by call-process-region, which now uses
1640 temporary-file-directory instead.
1642 ** The COUNT and SYSTEM-FLAG arguments to define-abbrev have been
1643 removed. The function now takes extra arguments for specifying
1644 arbitrary abbrev properties.
1646 ** end-of-defun-function is now guaranteed to work only when called
1647 from the start of a defun. It must now leave point exactly at the end
1648 of defun, since `end-of-defun' now itself moves forward over
1649 whitespace after calling it.
1652 * Lisp Changes in Emacs 23.1
1654 ** The new variable `generate-autoload-cookie' controls the magic comment
1655 string used by `update-file-autoloads' to find autoloaded forms. The
1656 variable `generated-autoload-file' similarly controls the name of the
1657 file where `update-file-autoloads' writes the calls to `autoload'.
1658 The default values are ";;;###autoload" and `loaddefs.el',
1661 ** New primitives `list-system-processes' and `process-attributes'
1662 let Lisp programs access the processes that are running on the local
1663 machine. See the doc strings of these functions for more details.
1664 Not all platforms support accessing this information; on those that
1665 don't, these primitives will return nil.
1667 ** New variable `user-emacs-directory'.
1668 Use this instead of "~/.emacs.d".
1670 ** If a local hook function has a non-nil `permanent-local-hook'
1671 property, `kill-all-local-variables' does not remove it from the local
1672 value of the hook variable; it remains even if you change major modes.
1674 ** `frame-inherited-parameters' lets new frames inherit parameters from
1677 ** New keymap `input-decode-map' overrides like key-translation-map, but
1678 applies before function-key-map. Also it is terminal-local contrary to
1679 key-translation-map. Terminal-specific key-sequences are generally added to
1680 this map rather than to function-key-map now.
1682 ** `ignore-errors' is now a standard macro (does not require the CL package).
1684 ** `interprogram-paste-function' can now return one string or a list
1685 of strings. In the latter case, Emacs puts the second and following
1686 strings on the kill ring.
1688 ** In `condition-case', a handler can specify "let the debugger run first".
1689 You do this by writing `debug' in the list of conditions to be handled,
1694 ((debug error) nil))
1696 ** clone-indirect-buffer now runs the clone-indirect-buffer-hook.
1698 ** `beginning-of-defun-function' now takes one argument, the count given to
1699 `beginning-of-defun'. (N.B. `end-of-defun-function' doesn't take any
1702 ** `file-remote-p' has new optional parameters IDENTIFICATION and CONNECTED.
1703 IDENTIFICATION specifies which part of the remote identifier has to be
1704 returned. With CONNECTED passed non-nil, it is checked whether a
1705 remote connection has been established already.
1707 ** The new macro `declare-function' suppresses compiler warnings about
1708 undefined functions.
1710 ** Changes to interactive function handling
1712 *** The new interactive spec code ^ says to first call
1713 handle-shift-selection if shift-select-mode is non-nil, before reading
1714 the command arguments. This is used for shift-selection (see above).
1716 *** Built-in functions can now have an interactive specification that
1717 is not a prompt string. If the `intspec' parameter of a `DEFUN'
1718 starts with a `(', the string is evaluated as a Lisp form.
1720 *** The interactive-form of a function can be added post-facto via the
1721 `interactive-form' symbol property. Mostly useful to add complex
1722 interactive forms to subroutines.
1726 *** Commands should use `use-region-p' to test whether there is
1727 an active region that they should operate on.
1729 *** `region-active-p' returns non-nil when Transient Mark mode is
1730 enabled and the mark is active. Most commands that act specially on
1731 the active region in Transient Mark mode should use `use-region-p'
1732 instead of `region-active-p', because `use-region-p' obeys the new
1733 user option `use-empty-active-region' (see Editing Changes, above).
1735 *** If a command sets `transient-mark-mode' to (only . OLDVAL), that
1736 means to activate transient-mark-mode temporarily, until the next
1737 unshifted point motion command or mark deactivation. Afterwards,
1738 reset transient-mark-mode to the value OLDVAL. The values `only' and
1739 `identity', introduced in Emacs 22, are now deprecated.
1741 ** Emacs session information
1743 *** The new variables `before-init-time' and `after-init-time' record the
1744 value of `current-time' before and after Emacs loads the init files.
1746 *** The new function `emacs-uptime' returns the uptime of an Emacs instance.
1748 *** The new function `emacs-init-time' returns the duration of the
1749 Emacs initialization.
1751 ** Changes affecting display-buffer
1753 *** display-buffer tries to be smarter when splitting windows.
1754 The new option split-window-preferred-function lets you specify your own
1755 function to pop up new windows. Its default value split-window-sensibly
1756 can split a window either vertically or horizontally, whichever seems
1757 more suitable in the current configuration. You can tune the behavior
1758 of split-window-sensibly by customizing split-height-threshold and the
1759 new option split-width-threshold. Both options now take the value nil
1760 to inhibit splitting in one direction. Setting split-width-threshold to
1761 nil inhibits horizontal splitting and gets you the behavior of Emacs 22
1762 in this respect. In any case, display-buffer may now split the largest
1763 window vertically even when it is not as wide as the containing frame.
1765 *** If pop-up-frames has the value `graphic-only', display-buffer only
1766 makes a separate frame on graphic displays.
1768 *** select-frame and set-frame-selected-window have a new optional
1769 argument NORECORD. If non-nil, this will avoid messing with the order
1770 of recently selected windows and the buffer list.
1772 ** Window parameters can now be defined.
1773 These are analogous to frame parameters, but are associated with
1776 *** The new functions window-parameters, window-parameter, and
1777 set-window-parameter are used to query and set window parameters.
1779 ** Minibuffer and completion changes
1781 *** A list of default values can be specified for the DEFAULT argument of
1782 functions `read-from-minibuffer', `read-string', `read-command',
1783 `read-variable', `read-buffer', `completing-read'. Elements of this list
1784 are available for inserting into the minibuffer by typing `M-n'.
1785 For empty input these functions return the first element of this list.
1787 *** New function `read-regexp' uses the regexp history and some useful
1788 regexp defaults (string at point, last Isearch/replacement regexp/string)
1789 via M-n when reading a regexp in the minibuffer.
1791 *** minibuffer-local-must-match-filename-map is now named
1792 minibuffer-local-filename-must-match-map.
1794 *** The `require-match' argument to `completing-read' accepts the new
1795 values `confirm-only' and `confirm-after-completion'.
1797 ** Search and replacement changes
1799 *** The regexp form \(?<num>:<regexp>\) specifies the group number explicitly.
1801 *** New function `match-substitute-replacement' returns the result of
1802 `replace-match' without actually using it in the buffer.
1804 *** The new variable `replace-search-function' determines the function
1805 to use for searching in query-replace and replace-string. The
1806 function it specifies is called by `perform-replace' when its 4th
1809 *** The new variable `replace-re-search-function' determines the
1810 function to use for searching in `query-replace-regexp',
1811 `replace-regexp', `query-replace-regexp-eval', and
1812 `map-query-replace-regexp'. The function it specifies is called by
1813 `perform-replace' when its 4th argument is non-nil.
1815 *** New keymap `search-map' bound to `M-s' provides global bindings
1816 for search related commands.
1818 *** New keymap `multi-query-replace-map' contains additonal keys bound
1819 to `automatic-all' and `exit-current' for multi-buffer interactive replacement.
1821 *** The variable `inhibit-changing-match-data', if non-nil, prevents
1822 the search and match primitives from changing the match data.
1824 *** New functions `word-search-forward-lax' and `word-search-backward-lax'.
1825 These are like `word-search-forward and `word-search-backward', except
1826 that the end of the search string need not match a word boundary,
1827 unless it ends in whitespace.
1829 ** File handling changes
1831 *** set-file-modes is now interactive and can take the mode value in
1832 symbolic notation thanks to auxiliary functions.
1834 *** file-local-variables-alist stores an alist of file-local
1835 variables defined in the current buffer.
1839 *** Each face can be remapped to a different face definition using the
1840 variable `face-remapping-alist'. This is an alist that maps faces to
1841 replacement definitions (which can be face names, lists of face names,
1842 or attribute/value plists. If this variable is buffer-local, the
1843 remapping occurs only in that buffer.
1845 *** text-scale-mode remaps the default face to a larger or smaller
1846 size in the current buffer. This feature is used by the Buffer Face
1847 menu and the new `C-x C-+', `C-x C--', and `C-x C-0' commands (see
1848 Editing Changes, above).
1852 **** `face-remap-add-relative' adds a face remapping entry to the
1855 **** ``face-remap-remove-relative' removes a face remapping entry from
1858 **** `face-remap-reset-base' restores a face to its global definition.
1860 **** `face-remap-set-base' sets the base remapping of a face.
1864 *** The new function `start-file-process' is similar to `start-process',
1865 but obeys file handlers. The file handler is chosen based on
1866 `default-directory'. The functions `start-file-process-shell-command'
1867 and `process-file-shell-command' are also new; they call internally
1868 `start-file-process' and `process-file', respectively.
1870 *** The new function `process-lines' executes an external program and
1871 returns its output as a list of lines.
1873 ** Character code, representation, and charset changes.
1875 *** In multibyte buffers and strings, characters are represented by
1876 UTF-8 byte sequences. The character code space is now 0x0..0x3FFFFF
1877 with no gap; code points 0x0..0x10FFFF are Unicode characters of the
1878 same code points, while code points 0x3FFF80..0x3FFFFF are raw 8-bit
1881 *** Generic characters no longer exist.
1883 *** The concept of a charset has changed. A single character may
1884 belong to multiple charsets (e.g. a-grave, U+00E0, belongs to charsets
1885 unicode, iso-8859-1, iso-8859-3, etc).
1887 **** The dimension of a charset is now 1, 2, 3, or 4, and the size of
1888 each dimension is no longer limited to 94 or 96.
1890 **** A dynamic charset priority list is used to infer the charset of
1891 characters for display.
1893 *** The functions `split-char' and `make-char' now accept up to 4
1894 positional codes instead of just 2.
1896 *** The functions `encode-char' and `decode-char' now accept any character sets.
1898 *** The function `define-charset' now accepts a completely different
1899 form of arguments (old-style arguments still work).
1901 *** The value of the function `char-charset' depends on the current
1902 priorities of charsets.
1904 *** The function get-char-code-property now accepts many Unicode base
1905 character properties. They are `name', `general-category',
1906 `canonical-combining-class', `bidi-class', `decomposition',
1907 `decimal-digit-value', `digit-value', `numeric-value', `mirrored',
1908 `old-name', `iso-10646-comment', `uppercase', `lowercase', and
1911 *** The functions `modify-syntax-entry' and `modify-category-entry' now
1912 accept a cons of characters as the first argument, and modify all
1913 entries in that range of characters.
1915 *** Use of `translation-table-for-input' for character code unification
1916 is now obsolete, since Emacs 23.1 and later uses Unicode as basis for
1917 internal representation of characters.
1921 **** `characterp' returns t if and only if the argument is a character.
1922 This replaces `char-valid-p', which is now obsolete.
1924 **** `max-char' returns the maximum character code (currently #x3FFFFF).
1926 **** `define-charset-alias' defines an alias of a charset.
1928 **** `set-charset-priority' sets priorities of charsets.
1930 **** `charset-priority-list' returns a prioritized list of charsets.
1932 **** `unibyte-string' makes a unibyte string from bytes.
1934 **** `define-char-code-property' defines a character code property.
1936 **** `char-code-property-description' returns the description string of
1937 a character code property.
1941 **** `find-word-boundary-function-table' is a char-table of functions to
1942 search for a word boundary.
1944 **** `char-script-table' is a char-table of script names.
1946 **** `char-width-table' is a char-table of character widths.
1948 **** `print-charset-text-property' controls how to handle `charset' text
1949 property on printing a string.
1951 **** `printable-chars' is a char-table of printable characters.
1953 ** Code conversion changes
1955 *** The new function `define-coding-system' should be used to define a
1956 coding system instead of `make-coding-system' (which is now obsolete).
1958 *** The functions `encode-coding-region' and `decode-coding-region'
1959 have an optional 4th argument to specify where the result of
1960 conversion should go.
1962 *** The functions `encode-coding-string' and `decode-coding-string'
1963 have an optional 4th argument specifying a buffer to store the result
1966 *** The new variable `inhibit-null-byte-detection' controls whether to
1967 consider text with null bytes as binary data. By default, it is
1968 `nil', and Emacs uses `no-conversion' for any text containing null
1971 *** The functions `set-coding-priority' and `make-coding-system' are obsolete.
1975 **** `with-coding-priority' executes Lisp code using the specified
1976 coding system priority order.
1978 **** `check-coding-systems-region' checks if the text in the region is
1979 encodable by the specified coding systems.
1981 **** `coding-system-aliases' returns a list of aliases of a coding system.
1983 **** `coding-system-charset-list' returns a list of charsets supported
1986 **** `coding-system-priority-list' returns a list of coding systems
1987 ordered by their priorities.
1989 **** `set-coding-system-priority' sets priorities of coding systems.
1991 **** `coding-system-from-name' returns a coding system matching with
1995 ** There is a new input method, Robin, different from Quail.
1996 It has three functionalities:
1997 i) a simple input method (converts an ASCII sequence into a string).
1998 ii) converts an existing buffer substring into another string
1999 iii) reverse conversion (each character produced by a
2000 robin rule can hold the original ASCII sequence as a char-code-property)
2002 *** The new function `robin-define-package' defines a Robin package.
2004 *** The new function `robin-modify-package' modifies an existing Robin package.
2006 *** The new function `robin-use-package' starts using a Robin package
2009 *** The new function `string-to-unibyte' is like `string-as-unibyte'
2010 but signals an error if STRING contains a non-ASCII, non-eight-bit
2013 ** Changes related to the new font backend
2015 *** Which font backends to use can be specified by the X resource
2016 "FontBackend". For instance, to use both X core fonts and Xft fonts:
2018 Emacs.FontBackend: x,xft
2020 If this resource is not set, Emacs tries to use all font backends
2021 available on your graphic device.
2023 *** New frame parameter `font-backend' specifies a list of
2024 font-backends supported by the frame's graphic device. On X, they are
2025 currently `x' and `xft'.
2027 *** The function `set-fontset-font' now accepts a script name as the
2028 second argument, and has an optional 5th argument to control how to
2033 **** `fontp' checks if the argument is a font-spec or font-entity.
2035 **** `font-spec' creates a new font-spec object.
2037 **** `font-get' returns a font property value.
2039 **** `font-put' sets a font property value.
2041 **** `font-face-attributes' returns a plist of face attributes set by a font.
2043 **** `list-fonts' returns a list of font-entities matching a font spec.
2045 **** `find-font' returns the font-entity best matching the given font spec.
2047 **** `font-family-list' returns a list of family names of available fonts.
2049 **** `font-xlfd-name' returns an XLFD name of a given font spec, font
2050 entity, or font object.
2052 **** `clear-font-cache' clears all font caches.
2054 ** Changes related to multiple-terminal (multi-tty) support
2056 *** $TERM is now set to `dumb' for subprocesses. If you want to know the
2057 $TERM inherited by Emacs you will have to look inside initial-environment.
2059 *** $DISPLAY is now dynamically inherited from the frame's `display'.
2061 *** The `window-system' variable is now frame-local. The new
2062 `initial-window-system' variable contains the `window-system' value
2063 for the first frame. `window-system' is also now a function that
2064 takes a frame argument.
2066 *** The `keyboard-translate-table' variable and the terminal and
2067 keyboard coding systems are now terminal-local.
2069 *** You can specify a terminal device (`tty' parameter) and a terminal
2070 type (`tty-type' parameter) to `make-terminal-frame'.
2072 *** The function `make-frame-on-display' now works during a tty
2075 *** A new `terminal' data type.
2076 The functions `get-device-terminal', `terminal-parameters',
2077 `terminal-parameter', `set-terminal-parameter' use this data type.
2079 *** Function key sequences are now mapped using `local-function-key-map',
2080 a new variable. This inherits from the global variable function-key-map,
2081 which is not used directly any more.
2085 **** before-hack-local-variables-hook is called after setting new
2086 variable file-local-variables-alist, and before actually applying the
2087 file-local variables.
2089 **** `suspend-tty-functions' and `resume-tty-functions' are called
2090 after a tty frame has been suspended or resumed, respectively. The
2091 functions are called with the terminal id of the frame being
2092 suspended/resumed as a parameter.
2094 **** The special hook `delete-terminal-functions' is called before
2095 deleting a terminal.
2099 **** `delete-terminal'
2105 *** `initial-environment' holds the environment inherited from Emacs's parent.
2107 ** Redisplay changes
2109 *** For underlined characters, the distance between the underline and
2110 the baseline is controlled by a new variable, `underline-minimum-offset'.
2112 *** You can now pass the value of the `invisible' property to
2113 invisible-p to check whether it would cause the text to be invisible.
2114 This is convenient when checking invisibility of text with no buffer
2115 position (e.g. in before/after-strings).
2117 *** `clear-image-cache' can be told to flush only images of a specific file.
2119 *** `vertical-motion' can now be given a goal column.
2120 It now accepts a cons cell (COLS . LINES) in its first argument, which
2121 says to stop, where possible, at a pixel x-position equal to COLS
2122 times the default column width.
2124 *** redisplay-end-trigger-functions, set-window-redisplay-end-trigger,
2125 and window-redisplay-end-trigger are obsolete. Use `jit-lock-register'
2128 *** The new variables `wrap-prefix' and `line-prefix' specify display
2129 specs which are appended at display-time to every continuation line
2130 and non-continuation line, respectively. In addition, Emacs
2131 recognizes the `wrap-prefix' and `line-prefix' text or overlay
2132 properties; these have the same effects as the variables of the same
2133 name, but take precedence.
2135 ** The Lisp interpreter now treats non-breaking space as whitespace.
2137 ** Miscellaneous new functions
2139 *** `apply-partially' performs a "curried" application of a function.
2141 *** `buffer-swap-text' swaps text between two buffers. This can be
2142 useful for modes such as tar-mode, archive-mode, RMAIL.
2144 *** `combine-and-quote-strings' produces a single string from a list of strings
2145 sticking a separator string in between each pair, and quoting those
2146 strings that include the separator as their substring. Useful for
2147 consing shell command lines from the individual arguments.
2149 *** `custom-note-var-changed' tells Custom to treat the change in a
2150 certain variable as having been made within Custom.
2152 *** `face-all-attributes' returns an alist describing all the basic
2153 attributes of a given face.
2155 *** `format-seconds' converts a number of seconds into a readable
2156 string of days, hours, etc.
2158 *** `image-refresh' refreshes all images associated with a given image
2161 *** `locate-user-emacs-file' helps packages to select the appropriate
2162 place to save user-specific files. It defaults to `user-emacs-directory'
2163 unless the file already exists at $HOME.
2165 *** `read-color' reads a color name using the minibuffer.
2167 *** `read-shell-command' does what its name says, with completion. It
2168 uses the minibuffer-local-shell-command-map for that.
2170 *** `split-string-and-unquote' splits a string into a list of substrings
2171 on the boundaries of a given delimiter, and unquotes the substrings that
2172 are quoted. Useful for taking apart shell commands.
2174 *** The two new functions `looking-at-p' and `string-match-p' can do
2175 the same matching as `looking-at' and `string-match' without changing
2178 *** The two new functions `make-serial-process' and
2179 `serial-process-configure' provide a Lisp interface to the new serial
2180 port support (see Emacs changes, above).
2182 ** Miscellaneous new variables
2184 *** `auto-save-include-big-deletions', if non-nil, means auto-save is
2185 not turned off automatically after a big deletion.
2187 *** `read-circle', if nil, disables the reading of recursive Lisp
2188 structures using the #N= and #N# syntax.
2190 *** `this-command-keys-shift-translated' is non-nil if the key
2191 sequence invoking the current command was found by shift-translation.
2193 *** `window-point-insertion-type' determines the insertion-type of the
2194 marker used for window-point.
2196 *** bookmark provides `bookmark-make-record-function' so special major
2197 modes like Info can teach bookmark.el how to save and restore the
2200 *** `fill-forward-paragraph-function' specifies which function the
2201 filling code should use to find paragraph boundaries.
2204 * New Packages for Lisp Programming in Emacs 23.1
2206 ** The new package avl-tree.el deals with the AVL tree data structure.
2208 ** The new package check-declare.el verifies the accuracy of
2209 declare-function macros (see Lisp Changes, above).
2211 ** find-cmd.el can build `find' commands using lisp syntax.
2213 ** The package misearch.el has been added. It allows Isearch to search
2214 through multiple buffers. A variable `multi-isearch-next-buffer-function'
2215 defines the function to call to get the next buffer to search in the series
2216 of multiple buffers. Top-level functions `multi-isearch-buffers',
2217 `multi-isearch-buffers-regexp', `multi-isearch-files' and
2218 `multi-isearch-files-regexp' accept a single argument that specifies
2219 a list of buffers/files to search for a string/regexp.
2221 ** The new major mode `special-mode' is intended as a parent for
2222 major modes such as those that set the "'mode-class 'special" property.
2225 ----------------------------------------------------------------------
2226 This file is part of GNU Emacs.
2228 GNU Emacs is free software: you can redistribute it and/or modify
2229 it under the terms of the GNU General Public License as published by
2230 the Free Software Foundation, either version 3 of the License, or
2231 (at your option) any later version.
2233 GNU Emacs is distributed in the hope that it will be useful,
2234 but WITHOUT ANY WARRANTY; without even the implied warranty of
2235 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2236 GNU General Public License for more details.
2238 You should have received a copy of the GNU General Public License
2239 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2244 paragraph-separate: "[
\f]*$"
2247 arch-tag: e759449d-88b3-4de4-9900-3a6c3dfa23e2