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 * Changes in Emacs 23.2
41 ** New completion-style `initials' to complete M-x lch to list-command-history.
43 ** Unibyte sessions are declared obsolete.
44 I.e. the use of the environment variable EMACS_UNIBYTE, or command line
45 arguments --unibyte, --multibyte, --no-multibyte, and --no-unibyte
46 is deprecated. Similarly for custom-izing enable-multibyte-characters, or
47 setting default-enable-multibyte-characters.
49 ** The default value of `trash-directory' has changed to nil, which
50 means that `move-file-to-trash' trashes files according to
51 freedesktop.org specifications, the same method used by the Gnome,
52 KDE, and XFCE desktops. (This change has no effect on Windows, which
53 uses `system-move-file-to-trash' for trashing.)
56 ** Emacs frames can be maximized.
57 The command line arguments -mm/--maximized and the value maximized to the
58 frame parameter fullscreen makes the Emacs frame maximized.
61 ** New frame parameter sticky makes Emacs frames sticky in virtual desktops.
63 ** The pointer now becomes invisible when typing.
64 Customize make-pointer-invisible to turn it off.
67 ** On MS-Windows, `display-time' now displays the system load average
68 as well as the time, as it does on GNU and Unix.
70 ** Killing a buffer with a running process now asks a confirmation.
71 You can remove this query in two ways: either removing
72 `process-kill-buffer-query-function' from `kill-buffer-query-functions' or
73 setting the appropriate process flag with `set-process-query-on-exit-flag'.
76 ** If `select-active-regions' is t, any active region automatically
77 becomes the primary selection (for interaction with other window
78 applications). If you enable this, you might want to bind
79 `mouse-yank-primary' to Mouse-2.
81 ** The variable `load-in-progress' won't get corrupted by binding it
82 with `let'. In certain situations, loading an Emacs Lisp file from
83 source while in the midst of loading another file (e.g., with
84 `require' or `autoload') could cause the value of `load-in-progress'
85 to be corrupted once the outer load completed. Most code doesn't care
86 about this, but some (like c-mode) may check it.
88 ** When `save-interprogram-paste-before-kill' is non-nil, emacs will not
89 clobber the the interprogram paste when something is killed in it by
90 saving the former in the `kill-ring' before the latter.
92 ** When `kill-do-not-save-duplicates' is non-nil, identical subsequent
93 kills are not duplicated in the `kill-ring'.
95 ** File-local variable changes
97 *** Specifying a minor mode as a local variables enables that mode,
98 unconditionally. The previous behavior, toggling the mode, was
99 neither reliable nor generally desirable.
101 *** New commands for adding and removing file-local variables:
102 `add-file-local-variable', `delete-file-local-variable',
103 `add-file-local-variable-prop-line', and
104 `delete-file-local-variable-prop-line'.
106 *** New commands for adding and removing directory-local variables,
107 and copying them to and from file-local variable lists:
108 `add-dir-local-variable', `delete-dir-local-variable',
109 `copy-dir-locals-to-file-locals',
110 `copy-dir-locals-to-file-locals-prop-line' and
111 `copy-file-locals-to-dir-locals'.
113 ** New coding system `utf-8-hfs' is available in
114 international/ucs-normalize.el. It is suitable for
115 default-file-name-coding-system on Mac OS X.
118 * Editing Changes in Emacs 23.2
121 ** The default value for `blink-matching-paren-distance' has been increased.
124 * Changes in Specialized Modes and Packages in Emacs 23.2
126 ** .calc.el and .abbrev_defs obey user-emacs-directory.
128 ** Calc graphing commands (`g f' etc.) now work on MS-Windows,
129 if you have the native Windows port of Gnuplot version 3.8 or later
132 ** FIXME mail-user-agent change
133 This probably affects a lot of documentation.
139 *** The new command `Info-virtual-index' bound to "I" displays a menu of
140 matched topics found in the index.
142 *** The new command `info-finder' replaces finder.el with a virtual Info
143 manual that generates an Info file which gives the same information
144 through a menu structure.
147 ** New connection methods in Tramp.
148 The new connection method "rsyncc" has been introduced. On systems
149 which support GVFS-Fuse, Tramp offers also the new connection methods
150 "dav", "davs", "obex" and "synce".
153 ** Autorevert Tail mode
154 Autorevert Tail mode works now for remote files.
156 ** VC and related modes
158 *** FIXME: add info about the new VC functions: vc-root-diff and
159 vc-root-print-log once they stabilize.
161 *** When a file is not found, VC will not try to check it out of RCS anymore.
165 **** The new variable vc-git-add-signoff can be used to add a
166 Signed-off-by line when committing.
168 **** vc-dir displays the stash status
170 *** log-edit-strip-single-file-name controls whether or not single filenames
171 are stripped when copying text from the ChangeLog to the *VC-Log* buffer.
173 ** Calendar and diary
175 *** Fancy diary display is now the default.
176 If you prefer the simple display, customize `diary-display-function'.
178 *** The diary's fancy display now enables view-mode.
181 *** The command `calendar-current-date' accepts an optional argument
182 giving an offset from today.
187 *** The default value for `desktop-buffers-not-to-save' is nil.
188 This means Desktop will try restoring all buffers, when you restart
189 your Emacs session. Also, `desktop-buffers-not-to-save' is only
190 effective for buffers that have no associated file. If you want to
191 exempt buffers that do correspond to files, customize the value of
192 `desktop-files-not-to-save' instead.
196 *** The new command `async-shell-command' bound globally to `M-&' executes
197 the command asynchronously without the need to manually add ampersand to
198 the end of the command. Its output appears in the buffer `*Async Shell
202 *** Elint now uses compilation-mode, and recognizes more built-in
203 functions and variables.
206 * New Modes and Packages in Emacs 23.2
208 ** js.el is a new major mode for JavaScript files.
211 * Lisp changes in Emacs 23.2
213 ** New hook `after-load-functions' run after loading an Elisp file.
215 ** You can control which binding is preferentially shown in menus and
216 docstrings by adding a `:advertised-binding' property to the corresponding
217 command's symbol. That property can hold a single binding or a list
220 ** New macro with-silent-modifications to tweak text properties without
221 affecting the buffer's modification state.
222 ** All the default-FOO variables that hold the default value of the FOO
223 variable, are now declared obsolete.
225 ** read-key is a function halfway between read-event and read-key-sequence.
226 It reads a single key, but obeys input and escape sequence decoding.
228 ** start-process-shell-command and start-file-process-shell-command
229 now only take a single `command' argument.
231 ** The variable `process-file-side-effects' shall be bound to nil, if
232 a `process-file' call does not change a remote file. By this, file
233 name handlers like Tramp can apply optimizations.
235 ** Hash tables have a new printed representation that is readable.
236 The feature `hashtable-print-readable' identifies this new
239 ** Functions performing Unicode normalization are added. They are:
240 ucs-normalize-NFD-region, ucs-normalize-NFD-string,
241 ucs-normalize-NFC-region, ucs-normalize-NFC-string,
242 ucs-normalize-NFKD-region, ucs-normalize-NFKD-string,
243 ucs-normalize-NFKC-region, ucs-normalize-NFKC-string,
244 ucs-normalize-HFS-NFD-region, ucs-normalize-HFS-NFD-string,
245 ucs-normalize-HFS-NFC-region, ucs-normalize-HFS-NFC-string.
247 ** completion-annotate-function specifies how to compute annotations
248 for completions displayed in *Completions*.
251 ** Face aliases can now be marked as obsolete, using the macro
252 `define-obsolete-face-alias'.
255 ** Changing the file-names generated by byte-compilation by redefining
256 the function `byte-compile-dest-file' before loading bytecomp.el is obsolete.
257 Instead, customize byte-compile-dest-file-function.
260 * Installation Changes in Emacs 23.1
262 ** The default X toolkit is now Gtk+, rather than Lucid.
263 The configure option `--with-gtk' has been removed. Gtk is now the
264 default toolkit, but you can use --with-x-toolkit=gtk if necessary.
267 Fonts are handled by new code capable of dealing with multiple font
268 backends. This uses the freetype and fontconfig libraries.
270 *** Emacs now accepts font names supplied in the fontconfig format
271 (e.g. "monospace-12:bold") and GTK format (e.g. "Monospace Bold 12").
273 *** Added support for local fonts (fonts installed on the machine
274 where Emacs is running).
276 *** Added support for the Xft library for antialiasing.
278 *** Added support for the otf library for complex text layout by
281 *** Added support for the m17n library for text shaping.
283 ** Changes to image support
285 *** configure now checks for libgif before libungif when searching for
288 *** Emacs now supports the SVG image format through librsvg2.
290 *** Emacs now supports multi-page TIFF images.
292 ** New NeXTSTEP-based port
293 This provides support for GNUstep (via the GNUstep libraries) and Mac
294 OS X (via the Cocoa libraries).
296 Specify --with-ns to configure for this. By default, a self-contained
297 app will be built (containing all lisp). To install/share lisp with
298 other emacsen (e.g. X11 build) use --disable-ns-self-contained. See
299 nextstep/README and nextstep/INSTALL in the Emacs source directory.
301 ** Mac OS X is no longer supported via Carbon.
302 Use the NeXTSTEP port, described above.
304 ** The new configuration option "--with-dbus" enables D-Bus language
307 ** Support for many obsolete platforms has been removed.
308 See the list at the end of etc/MACHINES for details.
310 *** Support for systems without alloca has been removed.
312 *** Support for Sun windows has been removed.
314 *** The `emacstool' utility has been removed.
316 ** The following platforms will be removed in a future Emacs version:
317 If you are still using Emacs on one of these platforms, please email
318 emacs-devel@gnu.org to inform the Emacs developers.
320 *** Old GNU/Linux systems based on libc version 5.
322 *** Old FreeBSD, NetBSD, and OpenBSD systems based on the COFF
325 *** Solaris versions 2.6 and below.
327 *** Solaris on IBM RS6000 machines.
329 *** UNIX System V (the original SysV, not later platforms based on it).
331 *** Unixware on non-x86 machines.
333 *** Platforms not supporting shared libraries (i.e., requiring the
334 NO_SHARED_LIBS compilation flag).
336 ** The configure options `--with-gcc', `--without-gcc' have been removed.
337 Configure will use gcc by default. Set the CC environment variable if
338 you need control over which C compiler is used.
340 ** The refcards are now shipped as PDF files.
342 ** The manuals are now licensed under the GNU Free Documentation License v1.3,
343 or any later version.
345 ** Emacs 23 comes with a new set of default icons.
346 Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png.
347 The Emacs 22 icon is available as `emacs22.png' in the same location.
349 * Changes in Emacs 23.1
351 ** Improved X Window System support
353 *** Emacs now supports using both X displays and ttys in one session.
354 With an Emacs server active (M-x server-start), `emacsclient -t'
355 creates a tty frame connected to the running emacs server. You can
356 use any number of different ttys. `emacsclient -c' creates a new X11
357 frame on the current $DISPLAY (or a tty frame if $DISPLAY is not set).
358 There may be problems if a display exits unexpectedly and Emacs is compiled
359 with Gtk+, see etc/PROBLEMS.
361 You can test for the presence of this feature in your Lisp code by
362 testing for the `multi-tty' feature.
364 *** Emacs starts in the background, as a daemon, when given the
365 --daemon command line argument. It disconnects from the terminal and
366 starts the server. Clients can connect and create graphical or
367 terminal frames using emacsclient.
369 **** emacsclient starts emacs in daemon mode and connects to it when
370 --alternate-editor="" is used (or when the evironment variable
371 ALTERNATE_EDITOR is set to "") and emacsclient cannot connect to an
374 *** The new command close-display-connection closes a connection to a
375 remote display. There are some bugs for Gtk+. See etc/PROBLEMS.
377 *** Emacs now supports the XEmbed specification.
378 You can embed Emacs in another application on X11. The new command line
379 option --parent-id is used to pass the parent window id to Emacs. See
380 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
381 for details about XEmbed.
383 *** Emacs can now set the frame opacity.
384 The opacity of a frame can be controlled by setting the `alpha' frame
385 parameter. This only takes effect on a compositing window manager for
386 the X Window System, such as Compiz, Beryl and Compiz Fusion, on Mac
387 OS X, or on Windows 2000 and later versions of Windows.
389 The alpha parameter should be an integer between 0 (transparent) and
390 100 (opaque), or a float number between 0.0 and 1.0. It can also be a
391 cons cell (ACTIVE . INACTIVE), where ACTIVE is the opacity of an
392 active frame and INACTIVE is the opacity of non-active frames.
394 The variable `frame-alpha-lower-limit' defines a lower bound for the
395 opacity; the default is 20.
397 ** Internationalization changes
399 *** The Emacs character set is now a superset of Unicode.
400 (It has about four times the code space, which should be plenty).
402 The internal encoding used for buffers and strings is now
403 Unicode-based and called `utf-8-emacs' (`emacs-internal' is an alias
404 for this). This encoding is backward-compatible with Unicode's UTF-8
405 encoding. The internal encoding previously used by Emacs,
406 `emacs-mule', is still available for reading and writing files.
408 During byte-compilation, Emacs 23 uses `utf-8-emacs' to write files.
409 As a result, byte-compiled files containing non-ASCII characters can't
410 be read by earlier versions of Emacs. Files compiled by Emacs 20, 21,
411 or 22 are loaded correctly as `emacs-mule' (whether or not they
412 contain multibyte characters). This takes somewhat more time, so it
413 may be worth recompiling existing .elc files which don't need to be
414 shared with older Emacsen.
416 *** There are new coding systems/aliases; see M-x list-coding-systems.
418 *** There is a new charset implementation with many new charsets.
419 See M-x list-character-sets. New charsets can be defined conveniently
420 as tables of unicodes.
422 *** There are new language environments for Chinese-GBK,
423 Chinese-GB18030, Khmer, Bengali, Punjabi, Gujarati, Oriya, Telugu,
424 Sinhala, and TaiViet.
426 *** The minor modes unify-8859-on-encoding-mode and
427 unify-8859-on-decoding-mode are obsolete.
429 *** `ucs-insert' is bound to `C-x 8 RET' and in addition to hex numbers
430 accepts numbers in hash notation (e.g. #o21430 for octal, or #10r8984 for
431 decimal). It also accepts Unicode character names with completion.
433 *** The `cyrillic-translit' input method supports many new characters.
434 Common typographical characters available from Unicode were added to
435 `cyrillic-translit': punctuation marks, accented characters, fractions,
438 ** Emacs now supports serial port access on GNU/Linux, Unix, and
439 Windows. The new command `serial-term' starts an interactive terminal
440 on a serial port. The serial port can be configured at runtime with
441 the mode-line mouse menu.
445 *** In the Options menu, the "Set Default Font" item applies the
446 selected font to the `default' face on all frames, not just the
447 current frame. Furthermore, if Emacs is compiled with both GTK and
448 Fontconfig support, the "Set Default Font" item uses the GTK font
449 selection dialog instead of an Emacs pop-up menu.
451 *** The font setting chosen by "Set Default Font" is saved if the
452 "Save Options" item is used.
454 *** The Tools menu contains a new Encryption/Decryption submenu.
455 This contains commands provided by EasyPG, the newly-included
456 interface to GnuPG (see New Modes and Packages).
458 *** In the Options menu, the "Truncate Long Lines in the Buffer" entry
459 has been replaced with a submenu offering three different ways to
460 handle long lines: truncation, continuation at the window edge, and
461 the new word wrapping behavior (see Editing Changes, below).
463 *** Improvements to menus for major and minor modes
464 More major and minor modes now have a mode specific menu, and existing
465 mode menus have been improved to include more functionality.
469 *** The mode-line displays a `@', instead of `-', if the
470 default-directory for the current buffer is on a remote machine.
472 *** The mode-line displays a mode menu when mouse-1 is clicked on a
473 minor mode, in the same way as it already did for major modes.
475 *** The `mode-line-emphasis' face is used to highlight certain
476 mode-line information (e.g. waiting for a VC command to finish).
478 *** The mode-line tooltips have been improved to provide more details.
480 *** The VC, line/colum number and minor mode indicators on the mode
481 line are now interactive: mouse-1 can be used on them to pop up a menu.
483 ** File deletion can make use of the Recycle Bin or system Trash folder.
484 Set `delete-by-moving-to-trash' non-nil to use this. Deleted files
485 and directories will then be sent to the Recycle Bin on Windows, and
486 to `trash-directory' on other systems.
488 ** Directory-local variables can now be defined.
489 By default, Emacs looks in .dir-locals.el for directory-local
490 variables. For more information, see `dir-locals-set-directory-class'
491 and `dir-locals-set-class-variables'.
493 ** Emacs can now use `auth-source' for authentication.
494 `smtpmail' and `url' (Tramp and Gnus also) use `auth-source' to obtain
495 login names and passwords. The match, if found, is reported
496 in *Messages* with the password blanked out.
498 ** `where-is-preferred-modifier' can specify your favorite modifier.
501 * Startup Changes in Emacs 23.1
503 ** The option `inhibit-startup-screen' (with aliases to old names
504 `inhibit-splash-screen' and `inhibit-startup-message') doesn't inhibit
505 display of the initial message in the *scratch* buffer. If you don't
506 want to display the initial message in the *scratch* buffer at startup,
507 you can set the option `initial-scratch-message' to nil.
509 ** New user option `initial-buffer-choice' specifies what to display
510 after starting Emacs: startup screen, *scratch* buffer, visiting a
513 ** New alias `argv' for `command-line-args-left'
514 This is a convenience alias, so that one can write `(pop argv)'
515 inside of --eval command line arguments in order to access
518 ** The abbrev file is no longer read at startup in batch mode.
520 ** Emacs now supports invocation by an X session manager.
521 It can save a session and restore it later. See the documentation of
522 the functions `emacs-session-save' and `emacs-session-restore'.
523 (Actually, this feature was introduced with Emacs 22, but it was not
526 * Incompatible Editing Changes in Emacs 23.1
528 ** In Dired, `dired-flag-garbage-files' is rebound from `&' to `%&'
529 on the regexp command prefix map.
531 ** In Dired-x, all command guesses for ! are now added to the default
532 list accessible by M-n instead of pushing all guesses temporarily into
535 ** In Isearch mode, a special case of typing `C-w' at the beginning of
536 the minibuffer that toggles word search (i.e. using key sequences
537 `C-s RET C-w' or `C-s M-e C-w') is obsolete. You can use the global key
538 `M-s w' to start word search, or type `M-s w' in Isearch mode to
539 toggle word search. To start nonincremental word search you can now use
540 `M-s w RET' and `M-s w C-r RET' instead of `C-s RET C-w' and `C-r RET C-w'.
542 ** In Info, `Info-search' is unbound from `M-s' to allow using `M-s w'
543 for word search as well as other search commands from the global prefix
544 key `M-s'. `Info-search' is still bound to `s', and also incremental
545 search commands `C-s', `C-M-s', `C-r', `C-M-r' are available for searching
546 through multiple Info nodes, together with their nonincremental versions
547 `C-s RET', `C-r RET', `C-M-s RET', `C-M-r RET', `M-s w RET'.
549 ** In Text mode, `center-line' and `center-paragraph' are rebound from
550 `M-s' and `M-S' to global keys `M-o M-s' and `M-o M-S' on the global
551 prefix map `M-o', which is intended for such formatting commands.
553 ** The following input methods were removed in Emacs 22.2, but this was
554 not advertised: danish-alt-postfix, esperanto-alt-postfix,
555 finnish-alt-postfix, german-alt-postfix, icelandic-alt-postfix,
556 norwegian-alt-postfix, scandinavian-alt-postfix, spanish-alt-postfix,
557 and swedish-alt-postfix. Use the versions without "alt-", which are
561 * Editing Changes in Emacs 23.1
563 ** The C-n and C-p line-motion commands now move by screen lines,
564 taking continued lines and variable-width characters into account.
565 Setting `line-move-visual' to nil reverts this to the previous
566 behavior (i.e., motion by logical lines based on buffer contents
569 ** C-x C-c now invokes `save-buffers-kill-terminal', and C-z now
570 invokes `suspend-frame'. These changes are for compatibility with the
571 new multi-tty support (see `Improved X Window System support' above).
575 *** Transient Mark mode is now on by default.
577 *** mark-even-if-inactive now defaults to t
579 *** When Transient Mark mode is on, C-SPC C-SPC pushes a mark without
582 *** When Transient Mark mode is on, M-q now fills the region if the
583 region is active. Otherwise, it fills the current paragraph.
585 *** When Transient Mark mode is on, M-$ now checks spelling of the
586 region if the region is active. Otherwise, it checks spelling of the
589 *** When Transient Mark mode is on, TAB now indents the region if the
592 *** The variable `use-empty-active-region' controls whether an empty
593 active region in Transient Mark mode should make commands operate on
596 ** Temporarily active regions
598 *** The new variable shift-select-mode, non-nil by default, controls
599 shift-selection. When Shift Select mode is on, shift-translated
600 motion keys (e.g. S-left and S-down) activate and extend a temporary
601 region, similar to mouse-selection.
603 *** Temporarily active regions, created using shift-selection or
604 mouse-selection, are not necessarily deactivated in the next command.
605 They are only deactivated after point motion commands that are not
606 shift-translated, or after commands that would ordinarily deactivate
607 the mark in Transient Mark mode (e.g., any command that modifies the
610 ** Minibuffer and completion changes
612 *** Emacs may ask for confirmation before opening a non-existent file
613 or buffer. By default, Emacs requests confirmation if you type RET
614 immediately after TAB, and the resulting input is not an existing file
615 or buffer; this usually happens when the minibuffer input did not
616 complete far enough and you entered RET by mistake. In that case,
617 Emacs puts the message "[Confirm]" in the minibuffer; type RET again
618 to create the file or buffer.
620 The new variable confirm-nonexistent-file-or-buffer determines whether
621 Emacs asks for confirmation. The default value is `after-completion'.
622 If you change it to t, Emacs always asks for confirmation; if you
623 change it to nil, Emacs never asks for confirmation.
625 *** The rules for performing completion have been changed.
626 When generating completion alternatives, Emacs now takes the
627 minibuffer text after point, if any, into account: this text is
628 treated as a substring of the remaining part of the completion
629 alternative (i.e., the part not matched by the minibuffer text before
630 point). If no completion alternatives are found this way, Emacs
631 attempts to perform partial-completion. If still no completion
632 alternatives are found, we fall back on the Emacs 22 rules for
633 performing completion.
635 The new variable `completion-styles' can be customized to choose your
636 favorite completion style.
638 *** When M-n in the minibuffer reaches the end of the list of defaults,
639 it adds the completion list to the end, so next M-n continues putting
640 completion items to the minibuffer. The same principle applies to
641 incremental search commands as well: C-s or C-M-s starts searching
642 the default values and after the end of defaults they continue
643 searching minibuffer completion items.
645 *** Minibuffer input of shell commands now comes with completion.
647 *** In the `C-x d' (Dired) prompt, typing M-n gives the visited file
648 name of the current buffer.
650 *** In the M-! (shell-command) prompt, M-n provides some default commands.
651 These are guessed using the file extension of the current file, based
652 on the file-handlers specified in the operating system's `mailcap'
653 file. The ! command in Dired (dired-do-shell-command) works
654 similarly, using the file displayed on the current line.
656 *** A list of regexp default values is available via M-n for `occur',
657 `keep-lines', `flush-lines' and `how-many'. This list includes the active
658 region in transient-mark-mode, the word under the cursor, the last Isearch
659 regexp, the last Isearch string and the last replacement regexp.
661 *** When enable-recursive-minibuffers is non-nil, operations which use
662 switch-to-buffer (such as C-x b and C-x C-f) do not fail any more when
663 used in a minibuffer or a dedicated window. Instead, they fallback on
664 using pop-to-buffer, which will use some other window. This change
665 has no effect when enable-recursive-minibuffers is nil (the default).
667 *** Isearch started in the minibuffer searches in the minibuffer history.
668 Reverse Isearch commands (C-r, C-M-r) search in previous minibuffer
669 history elements, and forward Isearch commands (C-s, C-M-s) search in
670 next history elements. When the reverse search reaches the first history
671 element, it wraps to the last history element, and the forward search
672 wraps to the first history element. When the search is terminated, the
673 history element containing the search string becomes the current.
675 *** The variable read-file-name-completion-ignore-case overrides
676 completion-ignore-case for file name completion.
678 *** The variable read-buffer-completion-ignore-case overrides
679 completion-ignore-case for buffer name completion.
681 *** The new command `minibuffer-force-complete' chooses one of the
682 possible completions, rather than stopping at the common prefix.
684 *** If `completion-auto-help' is `lazy', Emacs shows the completions
685 buffer only on the second attempt to complete. This was already
686 supported in `partial-completion-mode'.
690 *** S-down-mouse-1 now pops up a menu for changing the font and text
691 size of the default face in the current buffer. The face is changed
692 via face remapping (see Lisp changes, below).
694 *** New commands to change the default face size in the current buffer.
695 To increase it, type `C-x C-+' or `C-x C-='. To decrease it, type
696 `C-x C--'. To restore the default (global) face size, type `C-x C-0'.
697 These work via Text Scale mode, a new minor mode.
699 The final key in the above commands may be repeated without the
700 leading `C-x', e.g. `C-x C-= C-= C-=' increases the face height by
701 three steps. Each step scales the height of the default face by the
702 value of the variable `text-scale-mode-step'.
704 *** The commands buffer-face-mode and buffer-face-set can be used to
705 remap the default face in the current buffer. See "Buffer Face mode",
706 under New Modes and Packages.
708 ** Primary selection changes
710 *** You can disable kill ring commands from accessing the primary
711 selection by setting `x-select-enable-primary' to nil.
713 ** Continuation lines can now be wrapped at word boundaries
714 (word-wrapping). This is controlled by the new per-buffer variable
715 `word-wrap'. Word wrapping does not take place if continuation lines
716 are not shown, e.g. if truncate-lines is non-nil. The most convenient
717 way to enable word-wrapping is using the new minor mode Visual Line
718 mode; in addition to setting `word-wrap' to t, this rebinds some
719 editing commands to work on screen lines rather than text lines. See
720 New Modes and Packages, below.
722 ** Window management changes
724 *** truncate-partial-width-windows now accepts integer values, which
725 specify a minimum window width for partial-width windows, below which
726 lines are truncated. The default has been changed to 50.
728 *** The new command balance-windows-area balances windows both
729 vertically and horizontally.
731 *** pop-to-buffer now always sets input focus when the popped-to window
732 is on a different frame.
734 ** Miscellaneous changes:
736 *** C-l is bound to the new command recenter-top-bottom, rather than recenter.
737 This moves the current line to window center, top and bottom on
738 successive invocations.
740 *** scroll-preserve-screen-position also preserves the column position.
742 *** If `yank-pop-change-selection' is t, rotating the kill ring also
743 updates the selection or clipboard to the current yank, just as M-w
744 would do so with the text it copies to the kill ring.
746 *** C-M-% now shows replacement as it would look in the buffer, with
747 `\N' and `\&' substituted according to the match. Old behavior can be
748 restored by customizing `query-replace-show-replacement'.
750 *** The command shell prompts for the default directory, when it is
751 called with a prefix and the default directory is a remote file name.
752 This is because some file name handlers (like ange-ftp) are not able to
753 run processes remotely.
755 *** The new command kill-matching-buffers kills buffers whose name
758 *** The value of comment-style now defaults to `indent'.
759 Thefore, comment-start markers are inserted at the current indentation
760 of the region to comment, rather than the leftmost column.
762 *** The new commands `pp-macroexpand-expression' and
763 `pp-macroexpand-last-sexp' pretty-print macro expansions.
765 *** The new command `set-file-modes' allows to set file's mode bits.
766 The mode bits can be specified in symbolic notation, like with GNU
767 Coreutils, in addition to an octal number. `chmod' is a new
768 convenience alias for this function.
770 *** `next-error-recenter' specifies how next-error should recenter the
771 visited source file. Its value can be a number (for example, 0 for
772 top line, -1 for bottom line), or nil for no recentering.
774 *** When typing in a password in the echo area, C-y yanks the current
775 kill into the password.
777 *** Tooltip frame parameters `font' and `color' in `tooltip-frame-parameters'
778 are ignored. Customize the `tooltip' face instead.
780 *** `mkdir' is a new convenience alias for `make-directory'.
782 * New Modes and Packages in Emacs 23.1
784 ** Auto Composition Mode is a minor mode that composes characters
785 automatically when they are displayed. It is globally on by default.
786 It uses `auto-composition-function' (default `auto-compose-chars').
788 ** Bubbles, a new game, is similar to SameGame.
790 ** Buffer Face mode is a minor mode for remapping the default face in
791 the current buffer. The variable `buffer-face-mode-face' specifies
792 the face to remap to. The command `buffer-face-set' prompts for a
793 face name, sets `buffer-face-mode-face' to it, and enables
794 buffer-face-mode. See "Face changes", under Editing Changes, for a
795 description of face remapping.
797 ** butterfly flips the desired bit on the drive platter.
798 See http://xkcd.com/378/
800 ** bug-reference.el provides clickable links to bug reports.
802 ** dbus.el provides D-Bus language bindings.
803 D-Bus is an inter-process communication mechanism for applications
804 residing on the same host. See the manual for details.
806 ** DocView mode allows viewing of PDF, PostScript and DVI documents.
807 One can also search for a regular expression in the document. For
808 details, see the commentary in doc-view.el.
810 PDF and DVI files are now opened in Doc View mode by default.
812 In Postcript mode, C-c C-c launches Doc View minor mode for viewing
815 ** EasyPG provides an interface to the GNU Privacy Guard (GnuPG).
816 It includes a GnuPG keyring browser, cryptographic operations on
817 regions and files, and automatic encryption of *.gpg files. For
818 details, see the EasyPG Assistant User's Manual.
820 ** json.el is a library for parsing and generating JSON
821 (JavaScript Object Notation), a lightweight data-interchange format.
823 ** linum.el is a new minor mode to display line numbers for the
826 ** mairix.el is an interface to mairix, a free tool for indexing and
827 searching locally stored mail. It allows you to query mairix and
828 display the search results with Rmail, Gnus and VM. Note that there
829 is an existing Gnus back end, nnmairix.el, which should be used with
832 ** minibuffer-depth-indicate-mode shows the minibuffer depth in the prompt.
835 This is a new mode for editing XML documents. It allows a schema to
836 be associated with the XML document being edited, using Relax NG as
837 the schema language. The schema is used to provide two key features:
839 *** Continuous validation. nXML validates as you type, highlighting
840 any invalid parts of your document.
842 *** Completion. nXML can assist you in entering an element name,
843 attribute name or data value by using information about what is
844 allowed by the schema in that context.
846 ** proced.el provides a Dired-like interface for operating on
847 processes. Proced makes an Emacs buffer containing a listing of the
848 current processes. You can use the normal Emacs commands to move
849 around in this buffer, and special Proced commands to operate on the
850 processes listed. It is currently only functional on GNU/Linux,
851 MS-Windows and Solaris.
853 ** Remember Mode is a mode for jotting down things to remember.
854 Notes can be saved to a Diary file. For details, see the Remember
857 ** RST mode is a major mode for editing reStructuredText files.
859 ** Ruby mode is a major mode for Ruby files.
861 ** Visual Line mode provides support for editing by visual lines.
862 It turns on word-wrapping in the current buffer, and rebinds C-a, C-e,
863 and C-k to commands that operate by visual lines instead of logical
864 lines. This is a more reliable replacement for longlines-mode.
865 This can also be turned on using the menu bar, via
866 Options -> Line Wrapping in this Buffer -> Word Wrap
868 ** xesam.el is an implementation of Xesam, an interface to (desktop)
869 search engines like Beagle, Strigi, and Tracker. The Xesam API
870 requires D-Bus for communication.
872 ** zeroconf.el offers service discovery and service publishing
873 interfaces according to the zeroconf specification. It communicates
874 with Avahi, a zeroconf implementation, via D-Bus messages on systems
875 which have installed this software.
877 ** There is a new `whitespace' package.
878 (The pre-existing one has been renamed to `old-whitespace'.)
879 Now, besides reporting bogus blanks, the whitespace package has a
880 minor mode and a global minor mode to visualize blanks (TAB, (HARD)
881 SPACE and NEWLINE). The visualization is made via faces and/or display
882 table. It can also indicate lines that extend beyond a given column,
883 trailing blanks, and empty lines at the start or end of a buffer.
884 See `whitespace-style' for more details. The `whitespace-action' option
885 specifies what to do when a buffer is visited, killed, or written.
888 * Changes in Specialized Modes and Packages in Emacs 23.1
890 ** Abbrev has been rewritten in Elisp and extended with more flexibility.
892 *** New functions: abbrev-get, abbrev-put, abbrev-table-get, abbrev-table-put,
893 abbrev-table-p, abbrev-insert, abbrev-table-menu.
895 *** Special hook `abbrev-expand-functions' obsoletes `pre-abbrev-expand-hook'.
897 *** `make-abbrev-table', `define-abbrev', `define-abbrev-table' all take
898 extra arguments for arbitrary properties.
900 *** New variable `abbrev-minor-mode-table-alist'.
902 *** `local-abbrev-table' can hold a list of abbrev-tables.
904 *** Abbrevs have now the following special properties:
905 `:count', `:system', `:enable-function', `:case-fixed'.
907 *** Abbrev-tables have now the following special properties:
908 `:parents', `:case-fixed', `:enable-function', `:regexp',
909 `abbrev-table-modiff'.
913 *** `apropos-library' describes the elements defined in a given library.
915 *** Set `apropos-compact-layout' is you want a more compact (but wider) layout.
917 ** Archive Mode has basic support to browse Rar archives.
918 Note, however, that the free version of the unrar command only handles
919 versions 1 and 2 of the Rar format.
923 *** New command `bibtex-initialize' (re)initializes BibTeX buffers.
925 *** New `bibtex-entry-format' options `whitespace', `braces', and
926 `string', disabled by default.
928 *** New variable `bibtex-cite-matcher-alist' contains rules to
929 identify cited keys in BibTeX entries, used by `bibtex-find-crossref'.
931 *** Command `bibtex-url' allows multiple URLs per entry.
933 ** Calendar and diary
935 *** There is a new date style, `iso', essentially year/month/day.
936 The variable `european-calendar-style' is obsolete - use `calendar-date-style'.
937 Similarly, the commands `american-calendar' and `european-calendar'
938 should be replaced by `calendar-set-date-style'.
940 *** The calendar namespace has been rationalized.
941 All functions and variables now begin with a `calendar-', `diary-', or
942 `holiday-' prefix. The various calendar systems have secondary
943 prefixes, eg `calendar-french-'. The old names you are likely to use
944 directly still exist, for the time being, as aliases, but please start
947 *** The whitespace in the calendar layout can be customized.
949 calendar-left-margin, calendar-intermonth-spacing, calendar-column-width,
950 calendar-day-header-width, and calendar-day-digit-width.
952 *** Text (e.g. ISO weeks) can be displayed between the calendar months.
953 See the variables calendar-intermonth-header and calendar-intermonth-text.
955 *** The function `holiday-chinese' computes holidays on the Chinese calendar.
956 It has been used to add items to the list `holiday-oriental-holidays'.
958 *** `diary-remind' accepts a negative number -DAYS as a shorthand for
959 the list (1 2 ... DAYS).
963 *** The new command C-c C-f (change-log-find-file) finds the file
964 associated with the current log entry.
966 *** The new command C-c C-c (change-log-goto-source) goes to the
967 source code associated with a log entry.
969 ** Compile and grep modes
971 *** The mode-line entry for the *compilation* and *grep* buffer is color coded.
972 It has different colors for to show that: (a) the command is still
973 running, (b) successful completion, (c) error.
975 *** compilation-auto-jump-to-first-error tells `compile' to jump to
976 the first error encountered during compilations.
978 *** compilation-scroll-output accepts a new value, `first-error', which
979 says to stop auto scrolling at the first error that occurs.
981 *** The `cc' alias for C++ files in `grep-file-aliases' has been
982 improved. `hh' can be used to match C++ header files and `cchh' both
983 C++ sources and headers.
987 *** You can specify your copyright holders' names.
988 Only copyright lines with holders matching `copyright-names-regexp' are
989 considered for update.
991 *** Copyrights can be at the end of the buffer.
992 This is controlled by `copyright-at-end-flag' (used by, e.g., change-log-mode).
996 *** defcustom accepts new keyword arguments, `:safe' and `:risky', which
997 set a variable's `safe-local-variable' and `risky-local-variable' property.
1001 *** diff-refine-hunk highlights word-level details of changes in a diff hunk.
1002 It's used automatically as you move through hunks, see
1003 diff-auto-refine-mode. It is bound to `C-c C-b'.
1005 *** diff-add-change-log-entries-other-window iterates through the diff
1006 buffer and tries to create ChangeLog entries for each change.
1007 It is bound to `C-x 4 A'.
1009 *** Turning on `whitespace-mode' in a diff buffer will show trailing
1010 whitespace problems in the modified lines.
1014 *** In Dired, C-x C-q now runs the command wdired-change-to-wdired-mode,
1015 and C-x C-q in wdired-mode exits it with asking a question about
1018 *** `&' runs the command `dired-do-async-shell-command' that executes
1019 the command asynchronously without the need to manually add ampersand
1020 to the end of the command. Its output appears in the buffer `*Async Shell
1023 *** `M-s f C-s' and `M-s f M-C-s' run Isearch that matches only at file names.
1024 When a new user option `dired-isearch-filenames' is t, then even ordinary
1025 Isearch started with `C-s' and `C-M-s' matches only at file names in the
1026 Dired buffer. When `dired-isearch-filenames' is `dwim' then activation of
1027 file name Isearch depends on the position of point - if point is on a file
1028 name initially, then Isearch matches only file names, otherwise it matches
1029 everywhere in the Dired buffer. You can toggle file names matching on or
1030 off by typing `M-s f' in Isearch mode.
1032 *** `M-s a C-s' and `M-s a M-C-s' run multi-file Isearch on the marked files.
1033 They visit the first marked file in the sequence and display the usual Isearch
1034 prompt for a string or a regexp where all Isearch commands are available.
1036 *** `Q' in Dired provides two new keys for multi-file replacement.
1037 The upper case key `Y' replaces all remaining matches in all remaining files
1038 with no more questions. The upper case key `N' stops doing replacements
1039 in the current file and skips to the next file. These multi-file keys
1040 are available for all commands that use `tags-query-replace'
1041 including `dired-do-query-replace-regexp', `vc-dir-query-replace-regexp',
1042 `reftex-query-replace-document'.
1046 *** The line length of fixed-form Fortran is not fixed at 72 any more.
1047 Customize the variable `fortran-line-length' to change it.
1049 *** In Fortran mode, M-; is now bound to the standard comment-dwim,
1050 rather than fortran-indent-comment.
1052 *** (The increasingly misnamed) F90 mode supports Fortran 2003 syntax.
1056 *** The Gnus package has been updated
1057 There are many news features, bug fixes and improvements; see the file
1058 GNUS-NEWS or the node "No Gnus" in the Gnus manual for details.
1060 *** In Emacs 23, Gnus uses Emacs' new internal coding system `utf-8-emacs' for
1061 saving articles drafts and ~/.newsrc.eld. These file may not be read
1062 correctly in Emacs 22 and below. If you want to Gnus across different Emacs
1063 versions, you may set `mm-auto-save-coding-system' to `emacs-mule'.
1065 *** Passwords are consistently loaded through `auth-source'
1066 Gnus can use `auth-source' for POP and IMAP passwords. Also see that
1067 `smtpmail' and `url' support `auth-source' for SMTP and HTTP/HTTPS/RSS
1068 authentication respectively.
1072 *** New macro `with-help-window' should set up help windows better
1073 than `with-output-to-temp-buffer' with `print-help-return-message'.
1075 *** New option `help-window-select' permits to customize whether help
1076 window shall be automatically selected when invoking help.
1078 *** New variable `help-window-point-marker' permits one to specify a new
1079 position for point in help window (for example in `view-lossage').
1083 *** New command `isearch-forward-word' bound globally to `M-s w' starts
1084 incremental word search. New command `isearch-toggle-word' bound to the
1085 same key `M-s w' in Isearch mode toggles word searching on or off
1086 while Isearch is active.
1088 *** New command `isearch-highlight-regexp' bound to `M-s h r' in Isearch
1089 mode runs `highlight-regexp' (`hi-lock-face-buffer') with the current
1090 search string as its regexp argument. The same key `M-s h r' and
1091 other keys on the `M-s h' prefix are bound globally to the command
1092 `highlight-regexp' and other hi-lock commands.
1094 *** New command `isearch-occur' bound to `M-s o' in Isearch mode
1095 runs `occur' with the current search string. The same key `M-s o'
1096 is bound globally to the command `occur'.
1098 *** Isearch can now search through multiple ChangeLog files.
1099 When running Isearch in a ChangeLog file, if the search fails,
1100 then another C-s tries searching the previous ChangeLog,
1101 if there is one (e.g. going from ChangeLog to ChangeLog.12).
1102 This is enabled if multi-isearch-search is non-nil.
1104 *** Two new commands to start Isearch on a list of marked buffers
1105 for buff-menu.el and ibuffer.el are bound to the keys `M-s a C-s' and
1108 *** The part of an Isearch that failed to match is highlighted in
1109 `isearch-fail' face.
1111 *** `C-h C-h' in Isearch mode displays isearch-specific Help screen,
1112 `C-h b' displays all Isearch key bindings, `C-h k' displays the full
1113 documentation of the given Isearch key sequence, `C-h m' displays
1114 documentation of Isearch mode. All the rest Help commands exit Isearch mode
1115 and execute their global definitions.
1117 *** When started in the minibuffer, Isearch searches in the minibuffer
1118 history. See `Minibuffer changes', above.
1122 *** Upgraded to MH-E version 8.2. See MH-E-NEWS for details.
1125 *** The file etc/emacs.py now supports both Python 2 and 3, meaning
1126 that either version can be used as inferior Python by python.el.
1128 *** Python mode now has `pdbtrack' functionality. When using pdb to
1129 debug a Python program, pdbtrack notices the pdb prompt and displays
1130 the source file and line that the program is stopped at, much the same
1131 way as gud-mode does for debugging C programs with gdb.
1135 *** The default value of `recentf-keep' prevents from checking of
1136 remote files, if there is no established connection to the
1137 corresponding remote host.
1141 *** Rmail no longer converts the messages to Babyl format.
1142 Instead, it uses UNIX mbox format, both on disk and in Rmail buffers,
1143 and does conversion and decoding when a message is displayed.
1145 The first time you visit an Rmail file in Babyl format, Rmail
1146 automatically converts it to mbox format. This is a one-time
1147 conversion, but it can take a few minutes, depending on how fast is
1148 your machine and on the size of the file. You should find the rest of
1149 Rmail usage unaltered.
1151 However, M-x set-rmail-inbox-list now lasts only for one session
1152 because there is no way to save the list of inbox files in an
1155 Also, whereas with Babyl format M-x find-file would switch to Rmail
1156 mode, with mbox format this is no longer the case (there being no way
1157 to add an "-*- rmail-*-" cookie to an mbox file). Use C-u M-x rmail
1160 If you have written any extensions to Rmail, they are likely to need
1161 updating. Conceptually, the Rmail buffer that you see is no longer
1162 just a narrowed portion of the whole. So you cannot access the whole
1163 of a message (or message collection) by a simple save-restriction and
1164 widen. Instead, there are two buffers: the rmail-buffer, and the
1165 rmail-view-buffer. The former is the buffer that you see, the latter
1166 is invisible. Most of the time, the invisible `view' buffer contains
1167 the full contents of the Rmail file, and the Rmail buffer contains a
1168 decoded copy of the current message (with only a subset of the
1169 headers). In this state, Rmail is said to be `swapped'.
1171 You may find the following functions useful:
1173 `rmail-get-header' and `rmail-set-header' get or set the value of a
1174 message header, whether or not it is currently visible.
1176 `rmail-apply-in-message' is a general purpose function that calls a
1177 function (with arguments) which you specify on the full text of a given
1178 message. To further narrow to just the headers, search forward for "\n\n".
1180 *** The new command `rmail-mime' displays MIME messages.
1181 It is bound to `v' in Rmail buffers and summaries. It displays plain
1182 text and multipart messages in a temporary buffer, and offers buttons
1183 to save attachments.
1185 *** The command `rmail-redecode-body' no longer accepts the optional arg RAW.
1186 Since Rmail now holds messages in their original undecoded form in a
1187 separate buffer, `rmail-redecode-body' no longer encodes the original
1188 message, and therefore there should be no need to avoid encoding it.
1190 *** The o command is now `rmail-output'. It is an all-purpose command
1191 for copying messages from Rmail and appending them to files. It
1192 handles Babyl-format files as well as mbox-format files, and it
1193 handles both kinds properly when they are visited in Emacs. It always
1194 copies the full headers of the message.
1196 *** The C-o command is now `rmail-output-as-seen'. It uses
1197 the message as displayed, appending it to an mbox file.
1199 *** The modified status of the Rmail buffer is reported in the mode-line.
1200 Previously, this information was hidden.
1204 *** New option latex-indent-within-escaped-parens
1205 permits to customize indentation of LaTeX environments delimited
1210 *** If the gpm mouse server is running and t-mouse-mode is enabled,
1211 Emacs uses a Unix socket in a GNU/Linux console to talk to server,
1212 rather than faking events using the client program mev. This C level
1213 approach provides mouse highlighting and help echoing in the
1218 *** New connection methods.
1219 The new methods "plinkx", "plink2", "psftp", "sftp" and "fish" have
1220 been introduced. There are also new so-called gateway methods
1221 "tunnel" and "socks".
1224 IPv6 addresses are supported now as host names. They must be embedded
1225 in square brackets, like in "/ssh:[::1]:".
1227 *** Multihop syntax has been removed.
1228 The pseudo-method "multi" has been removed. Instead, multi hops
1229 can be specified by the new variable `tramp-default-proxies-alist'.
1231 *** More default settings.
1232 Default values can be set via the variables `tramp-default-user',
1233 `tramp-default-user-alist' and `tramp-default-host'.
1235 *** Connection information is cached.
1236 In order to reduce connection setup, information about used
1237 connections is kept persistently in a file. The name of this file is
1238 defined in the variable `tramp-persistency-file-name'.
1240 *** Control of remote processes.
1241 Running processes on a remote host can be controlled by settings in
1242 `tramp-remote-path' and `tramp-remote-process-environment'.
1244 *** Success of remote copy is checked.
1245 When the variable `file-precious-flag' is set, the success of a remote
1246 file copy is checked via the file's checksum.
1248 *** Passwords can be read from an authentification file.
1249 Tramp uses the package `auth-source' to read passwords from a file, if
1252 ** VC and related modes
1254 *** VC now supports applying VC operations to a set of files at a time.
1255 This enables VC to work much more effectively with changeset-oriented
1256 version-control systems such as Subversion, GNU Arch, Mercurial, Git
1257 and Bzr. VC will now pass a multiple-file commit to these systems as
1260 *** vc-dir is a new command that displays file names and their VC
1261 status. It allows to apply various VC operations to a file, a
1262 directory or a set of files/directories.
1264 *** VC switches are no longer appended, rather the first non-nil value is used.
1265 (This was for the most part true in Emacs 22, but was not advertised).
1266 This is because there is an increasing variety of VC systems, and they
1267 do not all accept the same "common" options. For example, a CVS diff
1268 command used to append the values of `vc-cvs-diff-switches',
1269 `vc-diff-switches', and `diff-switches'. Now the first non-nil value
1270 from that sequence is used. The special value `t' means "no switches".
1272 *** Clicking on the VC mode-line entry now pops the VC menu.
1274 *** The VC mode-line entry now has a tooltip that explains the VC file status.
1276 *** In VC Annotate mode, the key bindings have changed to use lower
1277 case keys instead of the upper case keys used in the past.
1279 *** In VC Annotate mode, for VC systems that support changesets, you can
1280 see the diff for the whole changeset (not only for the current file)
1281 by typing the D key. Using the "Show changeset diff of revision at
1282 line" menu entry does the same thing.
1284 *** In VC Annotate mode, you can type v to toggle the annotation visibility.
1286 *** In VC Annotate mode, you can type f to show the file revision on
1289 *** Asynchronous VC commands display [Waiting...] in the mode-line
1290 of the corresponding buffer as long as the asynchronous process is
1293 *** Log entries can be modified using the key "e" in log-view.
1294 For now only CVS, RCS, SCCS and SVN support this functionality.
1295 This is done by the `modify-change-comment' backend function.
1297 *** In log-view-mode, for VC systems that support changesets, you can
1298 see the diff for the whole changeset (not only for the current file)
1299 by typing the D key or using the "Changeset Diff" menu entry.
1301 *** In Log Edit mode, C-c C-d now shows the diff for the files involved.
1303 *** vc-git supports the "git grep" command.
1305 *** VC Support for Meta-CVS has been removed for lack of a maintainer able
1306 to update it to the new VC.
1310 *** comint-mode uses `start-file-process' now (see Lisp Changes).
1311 If `default-directory' is a remote file name, subprocesses are started
1312 on the corresponding remote system.
1314 *** Eldoc highlights the function argument under point
1315 with the face `eldoc-highlight-function-argument'.
1317 *** In Etags, the --members option is now the default.
1318 Use --no-members if you want the old default behavior of not tagging
1319 struct members in C, members variables in C++ and variables in PHP.
1321 *** The `gdb' command only works with the graphical interface now.
1322 Use `gud-gdb' if you want the (old) text command mode.
1324 *** goto-address.el provides two new minor modes, goto-address-mode and
1325 goto-address-prog-mode, which buttonize URLS and email addresses.
1327 *** The new command `eshell/info' runs info in an eshell buffer.
1329 *** The new variable `ffap-rfc-directories' specifies a list of local
1330 directories in which `ffap-rfc' will first search for RFCs.
1332 *** hide-ifdef-mode allows shadowing ifdef-blocks instead of hiding them.
1333 See option `hide-ifdef-shadow' and function `hide-ifdef-toggle-shadowing'.
1335 *** `icomplete-prospects-height' now supercedes `icomplete-prospects-length'.
1337 *** Info displays breadcrumbs in the header of the page.
1338 See Info-breadcrumbs-depth to control it.
1340 *** net-utils has an `iwconfig' command, similar to the existing `ifconfig'.
1341 It is used to configure wireless interfaces.
1343 *** The pcmpl-unix package supports hostname completion for ssh and scp.
1345 *** sgml-electric-tag-pair-mode lets you simultaneously edit matched tag pairs.
1347 *** smerge-refine highlights word-level details of changes in conflict.
1348 It's used automatically as you move through conflicts, see
1349 smerge-auto-refine-mode.
1351 *** talk.el has been extended for multiple tty support.
1353 *** A new command `display-time-world' has been added to the Time
1354 package. It creates a buffer with an updating time display using
1357 *** The appearance of superscript and subscript in TeX is more customizable.
1358 See the documentation of the variables: tex-fontify-script,
1359 tex-font-script-display, tex-suscript-height-ratio, and
1360 tex-suscript-height-minimum.
1362 *** view-remove-frame-by-deleting is now by default t
1363 since users found iconification of view-mode frames distracting.
1365 *** WoMan tries to add locale-specific manual page directories to the
1366 search path. This can be disabled by setting `woman-locale' to nil.
1369 * Changes in Emacs 23.1 on non-free operating systems
1371 ** Case is now considered significant in completion on MS-Windows.
1372 The default value of `completion-ignore-case' is now nil on
1373 MS-Windows, the same as it is for other operating systems. The
1374 variable doesn't apply to reading a file name -- in that case Emacs
1375 heeds `read-file-name-completion-ignore-case' instead.
1377 ** IPv6 is supported on MS-Windows.
1378 Emacs now supports IPv6 on Windows XP and later, and earlier versions
1379 of Windows with third party IPv6 stacks installed. In Emacs 22, IPv6 was
1380 supported on other platforms, but not on Windows due to using the winsock
1381 1.1 header file, even though Emacs was linking to the winsock 2 library.
1383 ** Busy cursor (hourglass) now displays on MS-Windows.
1384 When Emacs is busy, an hourglass mouse cursor is displayed on Windows.
1385 In Emacs 22 only X supported the busy cursor.
1387 ** Battery status is available on MS-Windows
1388 Emacs can now display the battery status in the mode-line when enabled with
1389 display-battery-mode or from the Options menu. More verbose battery
1390 information is also available with the command `battery'. In Emacs 22
1391 battery status was supported only on GNU/Linux and Mac.
1393 ** More keys available on MS-Windows.
1394 Keys normally associated with IMEs, and some exotic keys not normally found
1395 on standard keyboards have been given names so they can be bound to functions
1396 inside Emacs. If there are keys on your keyboard that have not been exposed
1397 to Emacs in the past, try C-h k to see if they are available now.
1399 Emacs can now bind functions to the extra buttons for media player and
1400 browser control present on some keyboards. These buttons are disabled
1401 by default, since enabling them prevents their system-wide use when
1402 Emacs has focus. To enable them, set the variable
1403 w32-pass-multimedia-buttons to nil. See the doc string of that variable
1404 for the list of extra keys that are available.
1406 ** BDF fonts no longer supported on MS-Windows.
1407 The font backend was completely rewritten for this release. The focus
1408 on Windows has been getting acceptable performance and full unicode
1409 support, including complex script shaping for native Windows fonts. A
1410 rewrite of the BDF font support has not happened due to lack of time
1411 and developers. If demand still exists for such a backend even with
1412 the improved language support for native Windows fonts, future
1413 development in this direction will most likely be based on the
1414 freetype library, giving access to a wider range of font formats.
1417 * Incompatible Lisp Changes in Emacs 23.1
1419 ** Variables cannot be both buffer-local and frame-local any more.
1421 ** `functionp' returns nil for special forms.
1422 I.e., it only returns t for objects that can be passed to `funcall'.
1424 ** The behavior of map-char-table has changed. It may call the
1425 specified function with a cons (FROM . TO) as a key if characters in
1426 that range have the same value.
1430 *** The function `dired-call-process' has been removed.
1432 *** The multibyteness of process filters is now determined by the
1433 coding-system used for decoding. The functions
1434 `process-filter-multibyte-p' and `set-process-filter-multibyte' are
1437 ** The variable `byte-compile-warnings' can now be a list starting with `not',
1438 meaning to disable the specified warnings. The meaning of this list
1439 may therefore be the reverse of what you expect (of course, this is
1440 only an issue if you make use of the new `not' syntax). Rather than
1441 checking/manipulating elements directly, use the new functions
1442 `byte-compile-warning-enabled-p', `byte-compile-disable-warning', and
1443 `byte-compile-enable-warning.'
1445 ** `mode-name' is no longer guaranteed to be a string.
1446 Use `(format-mode-line mode-name)' to ensure a string value.
1448 ** The function x-font-family-list has been removed.
1449 Use the new function font-family-list (see Lisp Changes, below).
1451 ** Internationalization changes
1453 *** The value of the function `charset-id' is now always 0.
1455 *** The functions `register-char-codings' and `coding-system-spec'
1458 *** The cpXXX coding systems are now supported automatically.
1459 The functions cp-...-codepage, which you had to use in Emacs 22 to
1460 enable support for these coding systems, have been deleted.
1462 *** The following features have been removed. They were used for
1463 displaying various scripts with specific fonts, and are no longer
1464 needed now that OpenType font support is available:
1466 **** `devanagari' and `devan-util', and all associated devanagari-* and
1467 dev-* functions and variables (formerly used for Devanagari script).
1469 **** `kannada' and `knd-util', and all associated kannada-* and knd-*
1470 functions and variables (formerly used for Kannada script).
1472 **** `malayalam' and `mlm-util', and all associated malayalam-* and
1473 mlm-* functions and variables (formerly used for Malayalam script).
1475 **** `tamil' and `tml-util, and all associated tamil-* and tml-*
1476 functions and variables (formerly used for Tamil script).
1478 *** The meaning of NAME argument of `set-fontset-font' is changed.
1479 Previously nil is accepted as the default fontset. Now, nil is for
1480 the fontset of the selected frame and t is for the default fontset.
1482 *** The meaning of FONTSET argument of `print-fontset' is changed.
1483 Now, nil is for the fontset of the selected frame and t is for the
1486 ** If a function in write-region-annotate-functions returns with a
1487 different buffer current, Emacs no longer kills that buffer
1488 automatically. This behavior existed in previous versions of Emacs,
1489 but was undocumented. To kill a buffer after write-region, give the
1490 variable `write-region-post-annotation-function' a buffer-local value
1493 ** The variable temp-file-name-pattern has been removed.
1494 This variable was only used by call-process-region, which now uses
1495 temporary-file-directory instead.
1497 ** The COUNT and SYSTEM-FLAG arguments to define-abbrev have been
1498 removed. The function now takes extra arguments for specifying
1499 arbitrary abbrev properties.
1501 ** end-of-defun-function is now guaranteed to work only when called
1502 from the start of a defun. It must now leave point exactly at the end
1503 of defun, since `end-of-defun' now itself moves forward over
1504 whitespace after calling it.
1507 * Lisp Changes in Emacs 23.1
1509 ** The new variable `generate-autoload-cookie' controls the magic comment
1510 string used by `update-file-autoloads' to find autoloaded forms. The
1511 variable `generated-autoload-file' similarly controls the name of the
1512 file where `update-file-autoloads' writes the calls to `autoload'.
1513 The default values are ";;;###autoload" and `loaddefs.el',
1516 ** New primitives `list-system-processes' and `process-attributes'
1517 let Lisp programs access the processes that are running on the local
1518 machine. See the doc strings of these functions for more details.
1519 Not all platforms support accessing this information; on those that
1520 don't, these primitives will return nil.
1522 ** New variable `user-emacs-directory'.
1523 Use this instead of "~/.emacs.d".
1525 ** If a local hook function has a non-nil `permanent-local-hook'
1526 property, `kill-all-local-variables' does not remove it from the local
1527 value of the hook variable; it remains even if you change major modes.
1529 ** `frame-inherited-parameters' lets new frames inherit parameters from
1532 ** New keymap `input-decode-map' overrides like key-translation-map, but
1533 applies before function-key-map. Also it is terminal-local contrary to
1534 key-translation-map. Terminal-specific key-sequences are generally added to
1535 this map rather than to function-key-map now.
1537 ** `ignore-errors' is now a standard macro (does not require the CL package).
1539 ** `interprogram-paste-function' can now return one string or a list
1540 of strings. In the latter case, Emacs puts the second and following
1541 strings on the kill ring.
1543 ** In `condition-case', a handler can specify "let the debugger run first".
1544 You do this by writing `debug' in the list of conditions to be handled,
1549 ((debug error) nil))
1551 ** clone-indirect-buffer now runs the clone-indirect-buffer-hook.
1553 ** `beginning-of-defun-function' now takes one argument, the count given to
1554 `beginning-of-defun'. (N.B. `end-of-defun-function' doesn't take any
1557 ** `file-remote-p' has new optional parameters IDENTIFICATION and CONNECTED.
1558 IDENTIFICATION specifies which part of the remote identifier has to be
1559 returned. With CONNECTED passed non-nil, it is checked whether a
1560 remote connection has been established already.
1562 ** The new macro `declare-function' suppresses compiler warnings about
1563 undefined functions.
1565 ** Changes to interactive function handling
1567 *** The new interactive spec code ^ says to first call
1568 handle-shift-selection if shift-select-mode is non-nil, before reading
1569 the command arguments. This is used for shift-selection (see above).
1571 *** Built-in functions can now have an interactive specification that
1572 is not a prompt string. If the `intspec' parameter of a `DEFUN'
1573 starts with a `(', the string is evaluated as a Lisp form.
1575 *** The interactive-form of a function can be added post-facto via the
1576 `interactive-form' symbol property. Mostly useful to add complex
1577 interactive forms to subroutines.
1581 *** Commands should use `use-region-p' to test whether there is
1582 an active region that they should operate on.
1584 *** `region-active-p' returns non-nil when Transient Mark mode is
1585 enabled and the mark is active. Most commands that act specially on
1586 the active region in Transient Mark mode should use `use-region-p'
1587 instead of `region-active-p', because `use-region-p' obeys the new
1588 user option `use-empty-active-region' (see Editing Changes, above).
1590 *** If a command sets `transient-mark-mode' to (only . OLDVAL), that
1591 means to activate transient-mark-mode temporarily, until the next
1592 unshifted point motion command or mark deactivation. Afterwards,
1593 reset transient-mark-mode to the value OLDVAL. The values `only' and
1594 `identity', introduced in Emacs 22, are now deprecated.
1596 ** Emacs session information
1598 *** The new variables `before-init-time' and `after-init-time' record the
1599 value of `current-time' before and after Emacs loads the init files.
1601 *** The new function `emacs-uptime' returns the uptime of an Emacs instance.
1603 *** The new function `emacs-init-time' returns the duration of the
1604 Emacs initialization.
1606 ** Changes affecting display-buffer
1608 *** display-buffer tries to be smarter when splitting windows.
1609 The new option split-window-preferred-function lets you specify your own
1610 function to pop up new windows. Its default value split-window-sensibly
1611 can split a window either vertically or horizontally, whichever seems
1612 more suitable in the current configuration. You can tune the behavior
1613 of split-window-sensibly by customizing split-height-threshold and the
1614 new option split-width-threshold. Both options now take the value nil
1615 to inhibit splitting in one direction. Setting split-width-threshold to
1616 nil inhibits horizontal splitting and gets you the behavior of Emacs 22
1617 in this respect. In any case, display-buffer may now split the largest
1618 window vertically even when it is not as wide as the containing frame.
1620 *** If pop-up-frames has the value `graphic-only', display-buffer only
1621 makes a separate frame on graphic displays.
1623 *** select-frame and set-frame-selected-window have a new optional
1624 argument NORECORD. If non-nil, this will avoid messing with the order
1625 of recently selected windows and the buffer list.
1627 ** Window parameters can now be defined.
1628 These are analogous to frame parameters, but are associated with
1631 *** The new functions window-parameters, window-parameter, and
1632 set-window-parameter are used to query and set window parameters.
1634 ** Minibuffer and completion changes
1636 *** A list of default values can be specified for the DEFAULT argument of
1637 functions `read-from-minibuffer', `read-string', `read-command',
1638 `read-variable', `read-buffer', `completing-read'. Elements of this list
1639 are available for inserting into the minibuffer by typing `M-n'.
1640 For empty input these functions return the first element of this list.
1642 *** New function `read-regexp' uses the regexp history and some useful
1643 regexp defaults (string at point, last Isearch/replacement regexp/string)
1644 via M-n when reading a regexp in the minibuffer.
1646 *** minibuffer-local-must-match-filename-map is now named
1647 minibuffer-local-filename-must-match-map.
1649 *** The `require-match' argument to `completing-read' accepts the new
1650 values `confirm-only' and `confirm-after-completion'.
1652 ** Search and replacement changes
1654 *** The regexp form \(?<num>:<regexp>\) specifies the group number explicitly.
1656 *** New function `match-substitute-replacement' returns the result of
1657 `replace-match' without actually using it in the buffer.
1659 *** The new variable `replace-search-function' determines the function
1660 to use for searching in query-replace and replace-string. The
1661 function it specifies is called by `perform-replace' when its 4th
1664 *** The new variable `replace-re-search-function' determines the
1665 function to use for searching in `query-replace-regexp',
1666 `replace-regexp', `query-replace-regexp-eval', and
1667 `map-query-replace-regexp'. The function it specifies is called by
1668 `perform-replace' when its 4th argument is non-nil.
1670 *** New keymap `search-map' bound to `M-s' provides global bindings
1671 for search related commands.
1673 *** New keymap `multi-query-replace-map' contains additonal keys bound
1674 to `automatic-all' and `exit-current' for multi-buffer interactive replacement.
1676 *** The variable `inhibit-changing-match-data', if non-nil, prevents
1677 the search and match primitives from changing the match data.
1679 *** New functions `word-search-forward-lax' and `word-search-backward-lax'.
1680 These are like `word-search-forward and `word-search-backward', except
1681 that the end of the search string need not match a word boundary,
1682 unless it ends in whitespace.
1684 ** File handling changes
1686 *** set-file-modes is now interactive and can take the mode value in
1687 symbolic notation thanks to auxiliary functions.
1689 *** file-local-variables-alist stores an alist of file-local
1690 variables defined in the current buffer.
1694 *** Each face can be remapped to a different face definition using the
1695 variable `face-remapping-alist'. This is an alist that maps faces to
1696 replacement definitions (which can be face names, lists of face names,
1697 or attribute/value plists. If this variable is buffer-local, the
1698 remapping occurs only in that buffer.
1700 *** text-scale-mode remaps the default face to a larger or smaller
1701 size in the current buffer. This feature is used by the Buffer Face
1702 menu and the new `C-x C-+', `C-x C--', and `C-x C-0' commands (see
1703 Editing Changes, above).
1707 **** `face-remap-add-relative' adds a face remapping entry to the
1710 **** ``face-remap-remove-relative' removes a face remapping entry from
1713 **** `face-remap-reset-base' restores a face to its global definition.
1715 **** `face-remap-set-base' sets the base remapping of a face.
1719 *** The new function `start-file-process' is similar to `start-process',
1720 but obeys file handlers. The file handler is chosen based on
1721 `default-directory'. The functions `start-file-process-shell-command'
1722 and `process-file-shell-command' are also new; they call internally
1723 `start-file-process' and `process-file', respectively.
1725 *** The new function `process-lines' executes an external program and
1726 returns its output as a list of lines.
1728 ** Character code, representation, and charset changes.
1730 *** In multibyte buffers and strings, characters are represented by
1731 UTF-8 byte sequences. The character code space is now 0x0..0x3FFFFF
1732 with no gap; code points 0x0..0x10FFFF are Unicode characters of the
1733 same code points, while code points 0x3FFF80..0x3FFFFF are raw 8-bit
1736 *** Generic characters no longer exist.
1738 *** The concept of a charset has changed. A single character may
1739 belong to multiple charsets (e.g. a-grave, U+00E0, belongs to charsets
1740 unicode, iso-8859-1, iso-8859-3, etc).
1742 **** The dimension of a charset is now 1, 2, 3, or 4, and the size of
1743 each dimension is no longer limited to 94 or 96.
1745 **** A dynamic charset priority list is used to infer the charset of
1746 characters for display.
1748 *** The functions `split-char' and `make-char' now accept up to 4
1749 positional codes instead of just 2.
1751 *** The functions `encode-char' and `decode-char' now accept any character sets.
1753 *** The function `define-charset' now accepts a completely different
1754 form of arguments (old-style arguments still work).
1756 *** The value of the function `char-charset' depends on the current
1757 priorities of charsets.
1759 *** The function get-char-code-property now accepts many Unicode base
1760 character properties. They are `name', `general-category',
1761 `canonical-combining-class', `bidi-class', `decomposition',
1762 `decimal-digit-value', `digit-value', `numeric-value', `mirrored',
1763 `old-name', `iso-10646-comment', `uppercase', `lowercase', and
1766 *** The functions `modify-syntax-entry' and `modify-category-entry' now
1767 accept a cons of characters as the first argument, and modify all
1768 entries in that range of characters.
1770 *** Use of `translation-table-for-input' for character code unification
1771 is now obsolete, since Emacs 23.1 and later uses Unicode as basis for
1772 internal representation of characters.
1776 **** `characterp' returns t if and only if the argument is a character.
1777 This replaces `char-valid-p', which is now obsolete.
1779 **** `max-char' returns the maximum character code (currently #x3FFFFF).
1781 **** `define-charset-alias' defines an alias of a charset.
1783 **** `set-charset-priority' sets priorities of charsets.
1785 **** `charset-priority-list' returns a prioritized list of charsets.
1787 **** `unibyte-string' makes a unibyte string from bytes.
1789 **** `define-char-code-property' defines a character code property.
1791 **** `char-code-property-description' returns the description string of
1792 a character code property.
1796 **** `find-word-boundary-function-table' is a char-table of functions to
1797 search for a word boundary.
1799 **** `char-script-table' is a char-table of script names.
1801 **** `char-width-table' is a char-table of character widths.
1803 **** `print-charset-text-property' controls how to handle `charset' text
1804 property on printing a string.
1806 **** `printable-chars' is a char-table of printable characters.
1808 ** Code conversion changes
1810 *** The new function `define-coding-system' should be used to define a
1811 coding system instead of `make-coding-system' (which is now obsolete).
1813 *** The functions `encode-coding-region' and `decode-coding-region'
1814 have an optional 4th argument to specify where the result of
1815 conversion should go.
1817 *** The functions `encode-coding-string' and `decode-coding-string'
1818 have an optional 4th argument specifying a buffer to store the result
1821 *** The new variable `inhibit-null-byte-detection' controls whether to
1822 consider text with null bytes as binary data. By default, it is
1823 `nil', and Emacs uses `no-conversion' for any text containing null
1826 *** The functions `set-coding-priority' and `make-coding-system' are obsolete.
1830 **** `with-coding-priority' executes Lisp code using the specified
1831 coding system priority order.
1833 **** `check-coding-systems-region' checks if the text in the region is
1834 encodable by the specified coding systems.
1836 **** `coding-system-aliases' returns a list of aliases of a coding system.
1838 **** `coding-system-charset-list' returns a list of charsets supported
1841 **** `coding-system-priority-list' returns a list of coding systems
1842 ordered by their priorities.
1844 **** `set-coding-system-priority' sets priorities of coding systems.
1846 **** `coding-system-from-name' returns a coding system matching with
1850 ** There is a new input method, Robin, different from Quail.
1851 It has three functionalities:
1852 i) a simple input method (converts an ASCII sequence into a string).
1853 ii) converts an existing buffer substring into another string
1854 iii) reverse conversion (each character produced by a
1855 robin rule can hold the original ASCII sequence as a char-code-property)
1857 *** The new function `robin-define-package' defines a Robin package.
1859 *** The new function `robin-modify-package' modifies an existing Robin package.
1861 *** The new function `robin-use-package' starts using a Robin package
1864 *** The new function `string-to-unibyte' is like `string-as-unibyte'
1865 but signals an error if STRING contains a non-ASCII, non-eight-bit
1868 ** Changes related to the new font backend
1870 *** Which font backends to use can be specified by the X resource
1871 "FontBackend". For instance, to use both X core fonts and Xft fonts:
1873 Emacs.FontBackend: x,xft
1875 If this resource is not set, Emacs tries to use all font backends
1876 available on your graphic device.
1878 *** New frame parameter `font-backend' specifies a list of
1879 font-backends supported by the frame's graphic device. On X, they are
1880 currently `x' and `xft'.
1882 *** The function `set-fontset-font' now accepts a script name as the
1883 second argument, and has an optional 5th argument to control how to
1888 **** `fontp' checks if the argument is a font-spec or font-entity.
1890 **** `font-spec' creates a new font-spec object.
1892 **** `font-get' returns a font property value.
1894 **** `font-put' sets a font property value.
1896 **** `font-face-attributes' returns a plist of face attributes set by a font.
1898 **** `list-fonts' returns a list of font-entities matching a font spec.
1900 **** `find-font' returns the font-entity best matching the given font spec.
1902 **** `font-family-list' returns a list of family names of available fonts.
1904 **** `font-xlfd-name' returns an XLFD name of a given font spec, font
1905 entity, or font object.
1907 **** `clear-font-cache' clears all font caches.
1909 ** Changes related to multiple-terminal (multi-tty) support
1911 *** $TERM is now set to `dumb' for subprocesses. If you want to know the
1912 $TERM inherited by Emacs you will have to look inside initial-environment.
1914 *** $DISPLAY is now dynamically inherited from the frame's `display'.
1916 *** The `window-system' variable is now frame-local. The new
1917 `initial-window-system' variable contains the `window-system' value
1918 for the first frame. `window-system' is also now a function that
1919 takes a frame argument.
1921 *** The `keyboard-translate-table' variable and the terminal and
1922 keyboard coding systems are now terminal-local.
1924 *** You can specify a terminal device (`tty' parameter) and a terminal
1925 type (`tty-type' parameter) to `make-terminal-frame'.
1927 *** The function `make-frame-on-display' now works during a tty
1930 *** A new `terminal' data type.
1931 The functions `get-device-terminal', `terminal-parameters',
1932 `terminal-parameter', `set-terminal-parameter' use this data type.
1934 *** Function key sequences are now mapped using `local-function-key-map',
1935 a new variable. This inherits from the global variable function-key-map,
1936 which is not used directly any more.
1940 **** before-hack-local-variables-hook is called after setting new
1941 variable file-local-variables-alist, and before actually applying the
1942 file-local variables.
1944 **** `suspend-tty-functions' and `resume-tty-functions' are called
1945 after a tty frame has been suspended or resumed, respectively. The
1946 functions are called with the terminal id of the frame being
1947 suspended/resumed as a parameter.
1949 **** The special hook `delete-terminal-functions' is called before
1950 deleting a terminal.
1954 **** `delete-terminal'
1960 *** `initial-environment' holds the environment inherited from Emacs's parent.
1962 ** Redisplay changes
1964 *** For underlined characters, the distance between the underline and
1965 the baseline is controlled by a new variable, `underline-minimum-offset'.
1967 *** You can now pass the value of the `invisible' property to
1968 invisible-p to check whether it would cause the text to be invisible.
1969 This is convenient when checking invisibility of text with no buffer
1970 position (e.g. in before/after-strings).
1972 *** `clear-image-cache' can be told to flush only images of a specific file.
1974 *** `vertical-motion' can now be given a goal column.
1975 It now accepts a cons cell (COLS . LINES) in its first argument, which
1976 says to stop, where possible, at a pixel x-position equal to COLS
1977 times the default column width.
1979 *** redisplay-end-trigger-functions, set-window-redisplay-end-trigger,
1980 and window-redisplay-end-trigger are obsolete. Use `jit-lock-register'
1983 *** The new variables `wrap-prefix' and `line-prefix' specify display
1984 specs which are appended at display-time to every continuation line
1985 and non-continuation line, respectively. In addition, Emacs
1986 recognizes the `wrap-prefix' and `line-prefix' text or overlay
1987 properties; these have the same effects as the variables of the same
1988 name, but take precedence.
1990 ** The Lisp interpreter now treats non-breaking space as whitespace.
1992 ** Miscellaneous new functions
1994 *** `apply-partially' performs a "curried" application of a function.
1996 *** `buffer-swap-text' swaps text between two buffers. This can be
1997 useful for modes such as tar-mode, archive-mode, RMAIL.
1999 *** `combine-and-quote-strings' produces a single string from a list of strings
2000 sticking a separator string in between each pair, and quoting those
2001 strings that include the separator as their substring. Useful for
2002 consing shell command lines from the individual arguments.
2004 *** `custom-note-var-changed' tells Custom to treat the change in a
2005 certain variable as having been made within Custom.
2007 *** `face-all-attributes' returns an alist describing all the basic
2008 attributes of a given face.
2010 *** `format-seconds' converts a number of seconds into a readable
2011 string of days, hours, etc.
2013 *** `image-refresh' refreshes all images associated with a given image
2016 *** `locate-user-emacs-file' helps packages to select the appropriate
2017 place to save user-specific files. It defaults to `user-emacs-directory'
2018 unless the file already exists at $HOME.
2020 *** `read-color' reads a color name using the minibuffer.
2022 *** `read-shell-command' does what its name says, with completion. It
2023 uses the minibuffer-local-shell-command-map for that.
2025 *** `split-string-and-unquote' splits a string into a list of substrings
2026 on the boundaries of a given delimiter, and unquotes the substrings that
2027 are quoted. Useful for taking apart shell commands.
2029 *** The two new functions `looking-at-p' and `string-match-p' can do
2030 the same matching as `looking-at' and `string-match' without changing
2033 *** The two new functions `make-serial-process' and
2034 `serial-process-configure' provide a Lisp interface to the new serial
2035 port support (see Emacs changes, above).
2037 ** Miscellaneous new variables
2039 *** `auto-save-include-big-deletions', if non-nil, means auto-save is
2040 not turned off automatically after a big deletion.
2042 *** `read-circle', if nil, disables the reading of recursive Lisp
2043 structures using the #N= and #N# syntax.
2045 *** `this-command-keys-shift-translated' is non-nil if the key
2046 sequence invoking the current command was found by shift-translation.
2048 *** `window-point-insertion-type' determines the insertion-type of the
2049 marker used for window-point.
2051 *** bookmark provides `bookmark-make-record-function' so special major
2052 modes like Info can teach bookmark.el how to save and restore the
2055 *** `fill-forward-paragraph-function' specifies which function the
2056 filling code should use to find paragraph boundaries.
2059 * New Packages for Lisp Programming in Emacs 23.1
2061 ** The new package avl-tree.el deals with the AVL tree data structure.
2063 ** The new package check-declare.el verifies the accuracy of
2064 declare-function macros (see Lisp Changes, above).
2066 ** find-cmd.el can build `find' commands using lisp syntax.
2068 ** The package misearch.el has been added. It allows Isearch to search
2069 through multiple buffers. A variable `multi-isearch-next-buffer-function'
2070 defines the function to call to get the next buffer to search in the series
2071 of multiple buffers. Top-level commands `multi-isearch-buffers',
2072 `multi-isearch-buffers-regexp', `multi-isearch-files' and
2073 `multi-isearch-files-regexp' accept a single argument that specifies
2074 a list of buffers/files to search for a string/regexp.
2076 ** The new major mode `special-mode' is intended as a parent for
2077 major modes such as those that set the "'mode-class 'special" property.
2080 ----------------------------------------------------------------------
2081 This file is part of GNU Emacs.
2083 GNU Emacs is free software: you can redistribute it and/or modify
2084 it under the terms of the GNU General Public License as published by
2085 the Free Software Foundation, either version 3 of the License, or
2086 (at your option) any later version.
2088 GNU Emacs is distributed in the hope that it will be useful,
2089 but WITHOUT ANY WARRANTY; without even the implied warranty of
2090 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2091 GNU General Public License for more details.
2093 You should have received a copy of the GNU General Public License
2094 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2099 paragraph-separate: "[
\f]*$"
2102 arch-tag: e759449d-88b3-4de4-9900-3a6c3dfa23e2