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 On Windows, this option causes Emacs to ignore Registry settings,
43 though environment variables set on the Registry are still honored.
45 *** The new variable `inhibit-x-resources' shows whether X resources
48 * Changes in Emacs 23.2
50 ** Unibyte sessions are now considered obsolete.
51 I.e. the use of the environment variable EMACS_UNIBYTE, or command line
52 arguments --unibyte, --multibyte, --no-multibyte, and --no-unibyte
53 is deprecated. Similarly for custom-izing enable-multibyte-characters, or
54 setting default-enable-multibyte-characters.
56 ** The default value of `trash-directory' has changed to nil, which
57 means that `move-file-to-trash' trashes files according to
58 freedesktop.org specifications, the same method used by the Gnome,
59 KDE, and XFCE desktops. (This change has no effect on Windows, which
60 uses `system-move-file-to-trash' for trashing.)
63 ** Emacs frames can be maximized.
64 The command line arguments -mm/--maximized and the value maximized to the
65 frame parameter fullscreen makes the Emacs frame maximized.
68 ** New frame parameter sticky makes Emacs frames sticky in virtual desktops.
70 ** The pointer now becomes invisible when typing.
71 Customize make-pointer-invisible to turn it off.
73 ** Killing a buffer with a running process now asks a confirmation.
74 You can remove this query in two ways: either removing
75 `process-kill-buffer-query-function' from `kill-buffer-query-functions' or
76 setting the appropriate process flag with `set-process-query-on-exit-flag'.
78 ** The variable `load-in-progress' won't get corrupted by binding it
79 with `let'. In certain situations, loading an Emacs Lisp file from
80 source while in the midst of loading another file (e.g., with
81 `require' or `autoload') could cause the value of `load-in-progress'
82 to be corrupted once the outer load completed. Most code doesn't care
83 about this, but some (like c-mode) may check it.
85 ** File-local variable changes
87 *** Specifying a minor mode as a local variables enables that mode,
88 unconditionally. The previous behavior, toggling the mode, was
89 neither reliable nor generally desirable.
91 *** New commands for adding and removing file-local variables:
92 `add-file-local-variable', `delete-file-local-variable',
93 `add-file-local-variable-prop-line', and
94 `delete-file-local-variable-prop-line'.
96 *** New commands for adding and removing directory-local variables,
97 and copying them to and from file-local variable lists:
98 `add-dir-local-variable', `delete-dir-local-variable',
99 `copy-dir-locals-to-file-locals',
100 `copy-dir-locals-to-file-locals-prop-line' and
101 `copy-file-locals-to-dir-locals'.
103 ** New coding system `utf-8-hfs' is available in
104 international/ucs-normalize.el. It is suitable for
105 default-file-name-coding-system on Mac OS X.
108 * Editing Changes in Emacs 23.2
112 *** If `select-active-regions' is t, any active region automatically
113 becomes the primary selection (for interaction with other window
114 applications). If you enable this, you might want to bind
115 `mouse-yank-primary' to Mouse-2.
117 *** When `save-interprogram-paste-before-kill' is non-nil, emacs will
118 not clobber the the interprogram paste when something is killed in it
119 by saving the former in the `kill-ring' before the latter.
121 ** When `kill-do-not-save-duplicates' is non-nil, identical subsequent
122 kills are not duplicated in the `kill-ring'.
125 ** The default value for `blink-matching-paren-distance' has been increased.
127 ** The new completion-style `initials' is available.
128 For instance, this can complete M-x lch to list-command-history.
131 * Changes in Specialized Modes and Packages in Emacs 23.2
133 ** .calc.el and .abbrev_defs obey user-emacs-directory.
135 ** Calc graphing commands (`g f' etc.) now work on MS-Windows,
136 if you have the native Windows port of Gnuplot version 3.8 or later
139 ** Calendar and diary
141 *** Fancy diary display is now the default.
142 If you prefer the simple display, customize `diary-display-function'.
144 *** The diary's fancy display now enables view-mode.
147 *** The command `calendar-current-date' accepts an optional argument
148 giving an offset from today.
152 *** The default value for `desktop-buffers-not-to-save' is nil.
153 This means Desktop will try restoring all buffers, when you restart
154 your Emacs session. Also, `desktop-buffers-not-to-save' is only
155 effective for buffers that have no associated file. If you want to
156 exempt buffers that do correspond to files, customize the value of
157 `desktop-files-not-to-save' instead.
159 ** FIXME mail-user-agent change
160 This probably affects a lot of documentation.
166 *** The new command `Info-virtual-index' bound to "I" displays a menu of
167 matched topics found in the index.
169 *** The new command `info-finder' replaces finder.el with a virtual Info
170 manual that generates an Info file which gives the same information
171 through a menu structure.
174 ** New connection methods in Tramp.
175 The new connection method "rsyncc" has been introduced. On systems
176 which support GVFS-Fuse, Tramp offers also the new connection methods
177 "dav", "davs", "obex" and "synce".
179 ** nXML mode is now the default for editing XML files.
181 ** VC and related modes
183 *** FIXME: add info about the new VC functions: vc-root-diff and
184 vc-root-print-log once they stabilize.
186 *** When a file is not found, VC will not try to check it out of RCS anymore.
190 **** The new variable vc-git-add-signoff can be used to add a
191 Signed-off-by line when committing.
193 **** vc-dir displays the stash status
195 *** log-edit-strip-single-file-name controls whether or not single filenames
196 are stripped when copying text from the ChangeLog to the *VC-Log* buffer.
200 *** The new command `async-shell-command' bound globally to `M-&' executes
201 the command asynchronously without the need to manually add ampersand to
202 the end of the command. Its output appears in the buffer `*Async Shell
206 *** Autorevert Tail mode now works now for remote files.
209 *** Elint now uses compilation-mode, and recognizes more built-in
210 functions and variables.
213 * New Modes and Packages in Emacs 23.2
215 ** js.el is a new major mode for JavaScript files.
218 * Lisp changes in Emacs 23.2
220 ** eval-next-after-load is obsolete.
221 ** New hook `after-load-functions' run after loading an Elisp file.
223 ** You can control which binding is preferentially shown in menus and
224 docstrings by adding a `:advertised-binding' property to the corresponding
225 command's symbol. That property can hold a single binding or a list
228 ** New macro with-silent-modifications to tweak text properties without
229 affecting the buffer's modification state.
230 ** All the default-FOO variables that hold the default value of the FOO
231 variable, are now declared obsolete.
233 ** read-key is a function halfway between read-event and read-key-sequence.
234 It reads a single key, but obeys input and escape sequence decoding.
236 ** start-process-shell-command and start-file-process-shell-command
237 now only take a single `command' argument.
239 ** The variable `process-file-side-effects' shall be bound to nil, if
240 a `process-file' call does not change a remote file. By this, file
241 name handlers like Tramp can apply optimizations.
243 ** Hash tables have a new printed representation that is readable.
244 The feature `hashtable-print-readable' identifies this new
247 ** Functions performing Unicode normalization are added. They are:
248 ucs-normalize-NFD-region, ucs-normalize-NFD-string,
249 ucs-normalize-NFC-region, ucs-normalize-NFC-string,
250 ucs-normalize-NFKD-region, ucs-normalize-NFKD-string,
251 ucs-normalize-NFKC-region, ucs-normalize-NFKC-string,
252 ucs-normalize-HFS-NFD-region, ucs-normalize-HFS-NFD-string,
253 ucs-normalize-HFS-NFC-region, ucs-normalize-HFS-NFC-string.
255 ** completion-annotate-function specifies how to compute annotations
256 for completions displayed in *Completions*.
259 ** Face aliases can now be marked as obsolete, using the macro
260 `define-obsolete-face-alias'.
263 ** Changing the file-names generated by byte-compilation by redefining
264 the function `byte-compile-dest-file' before loading bytecomp.el is obsolete.
265 Instead, customize byte-compile-dest-file-function.
267 ** Several obsolete functions removed.
268 The functions have been obsolete since Emacs 19, and are unlikely to
271 time-stamp-month-dd-yyyy, time-stamp-dd/mm/yyyy, time-stamp-mon-dd-yyyy
272 time-stamp-dd-mon-yy, time-stamp-yy/mm/dd, time-stamp-yyyy/mm/dd,
273 time-stamp-yyyy-mm-dd, time-stamp-yymmdd, time-stamp-hh:mm:ss,
274 time-stamp-hhmm, baud-rate
276 * Changes in Emacs 23.2 on non-free operating systems
279 ** On MS-Windows, `display-time' now displays the system load average
280 as well as the time, as it does on GNU and Unix.
283 * Installation Changes in Emacs 23.1
285 ** The default X toolkit is now Gtk+, rather than Lucid.
286 The configure option `--with-gtk' has been removed. Gtk is now the
287 default toolkit, but you can use --with-x-toolkit=gtk if necessary.
290 Fonts are handled by new code capable of dealing with multiple font
291 backends. This uses the freetype and fontconfig libraries.
293 *** Emacs now accepts font names supplied in the fontconfig format
294 (e.g. "monospace-12:bold") and GTK format (e.g. "Monospace Bold 12").
296 *** Added support for local fonts (fonts installed on the machine
297 where Emacs is running).
299 *** Added support for the Xft library for antialiasing.
301 *** Added support for the otf library for complex text layout by
304 *** Added support for the m17n library for text shaping.
306 ** Changes to image support
308 *** configure now checks for libgif before libungif when searching for
311 *** Emacs now supports the SVG image format through librsvg2.
313 *** Emacs now supports multi-page TIFF images.
315 ** New NeXTSTEP-based port
316 This provides support for GNUstep (via the GNUstep libraries) and Mac
317 OS X (via the Cocoa libraries).
319 Specify --with-ns to configure for this. By default, a self-contained
320 app will be built (containing all lisp). To install/share lisp with
321 other emacsen (e.g. X11 build) use --disable-ns-self-contained. See
322 nextstep/README and nextstep/INSTALL in the Emacs source directory.
324 ** Mac OS X is no longer supported via Carbon.
325 Use the NeXTSTEP port, described above.
327 ** The new configuration option "--with-dbus" enables D-Bus language
330 ** Support for many obsolete platforms has been removed.
331 See the list at the end of etc/MACHINES for details.
333 *** Support for systems without alloca has been removed.
335 *** Support for Sun windows has been removed.
337 *** The `emacstool' utility has been removed.
339 ** The following platforms will be removed in a future Emacs version:
340 If you are still using Emacs on one of these platforms, please email
341 emacs-devel@gnu.org to inform the Emacs developers.
343 *** Old GNU/Linux systems based on libc version 5.
345 *** Old FreeBSD, NetBSD, and OpenBSD systems based on the COFF
348 *** Solaris versions 2.6 and below.
350 *** Solaris on IBM RS6000 machines.
352 *** UNIX System V (the original SysV, not later platforms based on it).
354 *** Unixware on non-x86 machines.
356 *** Platforms not supporting shared libraries (i.e., requiring the
357 NO_SHARED_LIBS compilation flag).
359 ** The configure options `--with-gcc', `--without-gcc' have been removed.
360 Configure will use gcc by default. Set the CC environment variable if
361 you need control over which C compiler is used.
363 ** The refcards are now shipped as PDF files.
365 ** The manuals are now licensed under the GNU Free Documentation License v1.3,
366 or any later version.
368 ** Emacs 23 comes with a new set of default icons.
369 Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png.
370 The Emacs 22 icon is available as `emacs22.png' in the same location.
372 * Changes in Emacs 23.1
374 ** Improved X Window System support
376 *** Emacs now supports using both X displays and ttys in one session.
377 With an Emacs server active (M-x server-start), `emacsclient -t'
378 creates a tty frame connected to the running emacs server. You can
379 use any number of different ttys. `emacsclient -c' creates a new X11
380 frame on the current $DISPLAY (or a tty frame if $DISPLAY is not set).
381 There may be problems if a display exits unexpectedly and Emacs is compiled
382 with Gtk+, see etc/PROBLEMS.
384 You can test for the presence of this feature in your Lisp code by
385 testing for the `multi-tty' feature.
387 *** Emacs starts in the background, as a daemon, when given the
388 --daemon command line argument. It disconnects from the terminal and
389 starts the server. Clients can connect and create graphical or
390 terminal frames using emacsclient.
392 **** emacsclient starts emacs in daemon mode and connects to it when
393 --alternate-editor="" is used (or when the evironment variable
394 ALTERNATE_EDITOR is set to "") and emacsclient cannot connect to an
397 *** The new command close-display-connection closes a connection to a
398 remote display. There are some bugs for Gtk+. See etc/PROBLEMS.
400 *** Emacs now supports the XEmbed specification.
401 You can embed Emacs in another application on X11. The new command line
402 option --parent-id is used to pass the parent window id to Emacs. See
403 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
404 for details about XEmbed.
406 *** Emacs can now set the frame opacity.
407 The opacity of a frame can be controlled by setting the `alpha' frame
408 parameter. This only takes effect on a compositing window manager for
409 the X Window System, such as Compiz, Beryl and Compiz Fusion, on Mac
410 OS X, or on Windows 2000 and later versions of Windows.
412 The alpha parameter should be an integer between 0 (transparent) and
413 100 (opaque), or a float number between 0.0 and 1.0. It can also be a
414 cons cell (ACTIVE . INACTIVE), where ACTIVE is the opacity of an
415 active frame and INACTIVE is the opacity of non-active frames.
417 The variable `frame-alpha-lower-limit' defines a lower bound for the
418 opacity; the default is 20.
420 ** Internationalization changes
422 *** The Emacs character set is now a superset of Unicode.
423 (It has about four times the code space, which should be plenty).
425 The internal encoding used for buffers and strings is now
426 Unicode-based and called `utf-8-emacs' (`emacs-internal' is an alias
427 for this). This encoding is backward-compatible with Unicode's UTF-8
428 encoding. The internal encoding previously used by Emacs,
429 `emacs-mule', is still available for reading and writing files.
431 During byte-compilation, Emacs 23 uses `utf-8-emacs' to write files.
432 As a result, byte-compiled files containing non-ASCII characters can't
433 be read by earlier versions of Emacs. Files compiled by Emacs 20, 21,
434 or 22 are loaded correctly as `emacs-mule' (whether or not they
435 contain multibyte characters). This takes somewhat more time, so it
436 may be worth recompiling existing .elc files which don't need to be
437 shared with older Emacsen.
439 *** There are new coding systems/aliases; see M-x list-coding-systems.
441 *** There is a new charset implementation with many new charsets.
442 See M-x list-character-sets. New charsets can be defined conveniently
443 as tables of unicodes.
445 *** There are new language environments for Chinese-GBK,
446 Chinese-GB18030, Khmer, Bengali, Punjabi, Gujarati, Oriya, Telugu,
447 Sinhala, and TaiViet.
449 *** The minor modes unify-8859-on-encoding-mode and
450 unify-8859-on-decoding-mode are obsolete.
452 *** `ucs-insert' is bound to `C-x 8 RET' and in addition to hex numbers
453 accepts numbers in hash notation (e.g. #o21430 for octal, or #10r8984 for
454 decimal). It also accepts Unicode character names with completion.
456 *** The `cyrillic-translit' input method supports many new characters.
457 Common typographical characters available from Unicode were added to
458 `cyrillic-translit': punctuation marks, accented characters, fractions,
461 ** Emacs now supports serial port access on GNU/Linux, Unix, and
462 Windows. The new command `serial-term' starts an interactive terminal
463 on a serial port. The serial port can be configured at runtime with
464 the mode-line mouse menu.
468 *** In the Options menu, the "Set Default Font" item applies the
469 selected font to the `default' face on all frames, not just the
470 current frame. Furthermore, if Emacs is compiled with both GTK and
471 Fontconfig support, the "Set Default Font" item uses the GTK font
472 selection dialog instead of an Emacs pop-up menu.
474 *** The font setting chosen by "Set Default Font" is saved if the
475 "Save Options" item is used.
477 *** The Tools menu contains a new Encryption/Decryption submenu.
478 This contains commands provided by EasyPG, the newly-included
479 interface to GnuPG (see New Modes and Packages).
481 *** In the Options menu, the "Truncate Long Lines in the Buffer" entry
482 has been replaced with a submenu offering three different ways to
483 handle long lines: truncation, continuation at the window edge, and
484 the new word wrapping behavior (see Editing Changes, below).
486 *** Improvements to menus for major and minor modes
487 More major and minor modes now have a mode specific menu, and existing
488 mode menus have been improved to include more functionality.
492 *** The mode-line displays a `@', instead of `-', if the
493 default-directory for the current buffer is on a remote machine.
495 *** The mode-line displays a mode menu when mouse-1 is clicked on a
496 minor mode, in the same way as it already did for major modes.
498 *** The `mode-line-emphasis' face is used to highlight certain
499 mode-line information (e.g. waiting for a VC command to finish).
501 *** The mode-line tooltips have been improved to provide more details.
503 *** The VC, line/colum number and minor mode indicators on the mode
504 line are now interactive: mouse-1 can be used on them to pop up a menu.
506 ** File deletion can make use of the Recycle Bin or system Trash folder.
507 Set `delete-by-moving-to-trash' non-nil to use this. Deleted files
508 and directories will then be sent to the Recycle Bin on Windows, and
509 to `trash-directory' on other systems.
511 ** Directory-local variables can now be defined.
512 By default, Emacs looks in .dir-locals.el for directory-local
513 variables. For more information, see `dir-locals-set-directory-class'
514 and `dir-locals-set-class-variables'.
516 ** Emacs can now use `auth-source' for authentication.
517 `smtpmail' and `url' (Tramp and Gnus also) use `auth-source' to obtain
518 login names and passwords. The match, if found, is reported
519 in *Messages* with the password blanked out.
521 ** `where-is-preferred-modifier' can specify your favorite modifier.
524 * Startup Changes in Emacs 23.1
526 ** The option `inhibit-startup-screen' (with aliases to old names
527 `inhibit-splash-screen' and `inhibit-startup-message') doesn't inhibit
528 display of the initial message in the *scratch* buffer. If you don't
529 want to display the initial message in the *scratch* buffer at startup,
530 you can set the option `initial-scratch-message' to nil.
532 ** New user option `initial-buffer-choice' specifies what to display
533 after starting Emacs: startup screen, *scratch* buffer, visiting a
536 ** New alias `argv' for `command-line-args-left'
537 This is a convenience alias, so that one can write `(pop argv)'
538 inside of --eval command line arguments in order to access
541 ** The abbrev file is no longer read at startup in batch mode.
543 ** Emacs now supports invocation by an X session manager.
544 It can save a session and restore it later. See the documentation of
545 the functions `emacs-session-save' and `emacs-session-restore'.
546 (Actually, this feature was introduced with Emacs 22, but it was not
549 * Incompatible Editing Changes in Emacs 23.1
551 ** In Dired, `dired-flag-garbage-files' is rebound from `&' to `%&'
552 on the regexp command prefix map.
554 ** In Dired-x, all command guesses for ! are now added to the default
555 list accessible by M-n instead of pushing all guesses temporarily into
558 ** In Isearch mode, a special case of typing `C-w' at the beginning of
559 the minibuffer that toggles word search (i.e. using key sequences
560 `C-s RET C-w' or `C-s M-e C-w') is obsolete. You can use the global key
561 `M-s w' to start word search, or type `M-s w' in Isearch mode to
562 toggle word search. To start nonincremental word search you can now use
563 `M-s w RET' and `M-s w C-r RET' instead of `C-s RET C-w' and `C-r RET C-w'.
565 ** In Info, `Info-search' is unbound from `M-s' to allow using `M-s w'
566 for word search as well as other search commands from the global prefix
567 key `M-s'. `Info-search' is still bound to `s', and also incremental
568 search commands `C-s', `C-M-s', `C-r', `C-M-r' are available for searching
569 through multiple Info nodes, together with their nonincremental versions
570 `C-s RET', `C-r RET', `C-M-s RET', `C-M-r RET', `M-s w RET'.
572 ** In Text mode, `center-line' and `center-paragraph' are rebound from
573 `M-s' and `M-S' to global keys `M-o M-s' and `M-o M-S' on the global
574 prefix map `M-o', which is intended for such formatting commands.
576 ** The following input methods were removed in Emacs 22.2, but this was
577 not advertised: danish-alt-postfix, esperanto-alt-postfix,
578 finnish-alt-postfix, german-alt-postfix, icelandic-alt-postfix,
579 norwegian-alt-postfix, scandinavian-alt-postfix, spanish-alt-postfix,
580 and swedish-alt-postfix. Use the versions without "alt-", which are
584 * Editing Changes in Emacs 23.1
586 ** The C-n and C-p line-motion commands now move by screen lines,
587 taking continued lines and variable-width characters into account.
588 Setting `line-move-visual' to nil reverts this to the previous
589 behavior (i.e., motion by logical lines based on buffer contents
592 ** C-x C-c now invokes `save-buffers-kill-terminal', and C-z now
593 invokes `suspend-frame'. These changes are for compatibility with the
594 new multi-tty support (see `Improved X Window System support' above).
598 *** Transient Mark mode is now on by default.
600 *** mark-even-if-inactive now defaults to t
602 *** When Transient Mark mode is on, C-SPC C-SPC pushes a mark without
605 *** When Transient Mark mode is on, M-q now fills the region if the
606 region is active. Otherwise, it fills the current paragraph.
608 *** When Transient Mark mode is on, M-$ now checks spelling of the
609 region if the region is active. Otherwise, it checks spelling of the
612 *** When Transient Mark mode is on, TAB now indents the region if the
615 *** The variable `use-empty-active-region' controls whether an empty
616 active region in Transient Mark mode should make commands operate on
619 ** Temporarily active regions
621 *** The new variable shift-select-mode, non-nil by default, controls
622 shift-selection. When Shift Select mode is on, shift-translated
623 motion keys (e.g. S-left and S-down) activate and extend a temporary
624 region, similar to mouse-selection.
626 *** Temporarily active regions, created using shift-selection or
627 mouse-selection, are not necessarily deactivated in the next command.
628 They are only deactivated after point motion commands that are not
629 shift-translated, or after commands that would ordinarily deactivate
630 the mark in Transient Mark mode (e.g., any command that modifies the
633 ** Minibuffer and completion changes
635 *** Emacs may ask for confirmation before opening a non-existent file
636 or buffer. By default, Emacs requests confirmation if you type RET
637 immediately after TAB, and the resulting input is not an existing file
638 or buffer; this usually happens when the minibuffer input did not
639 complete far enough and you entered RET by mistake. In that case,
640 Emacs puts the message "[Confirm]" in the minibuffer; type RET again
641 to create the file or buffer.
643 The new variable confirm-nonexistent-file-or-buffer determines whether
644 Emacs asks for confirmation. The default value is `after-completion'.
645 If you change it to t, Emacs always asks for confirmation; if you
646 change it to nil, Emacs never asks for confirmation.
648 *** The rules for performing completion have been changed.
649 When generating completion alternatives, Emacs now takes the
650 minibuffer text after point, if any, into account: this text is
651 treated as a substring of the remaining part of the completion
652 alternative (i.e., the part not matched by the minibuffer text before
653 point). If no completion alternatives are found this way, Emacs
654 attempts to perform partial-completion. If still no completion
655 alternatives are found, we fall back on the Emacs 22 rules for
656 performing completion.
658 The new variable `completion-styles' can be customized to choose your
659 favorite completion style.
661 *** When M-n in the minibuffer reaches the end of the list of defaults,
662 it adds the completion list to the end, so next M-n continues putting
663 completion items to the minibuffer. The same principle applies to
664 incremental search commands as well: C-s or C-M-s starts searching
665 the default values and after the end of defaults they continue
666 searching minibuffer completion items.
668 *** Minibuffer input of shell commands now comes with completion.
670 *** In the `C-x d' (Dired) prompt, typing M-n gives the visited file
671 name of the current buffer.
673 *** In the M-! (shell-command) prompt, M-n provides some default commands.
674 These are guessed using the file extension of the current file, based
675 on the file-handlers specified in the operating system's `mailcap'
676 file. The ! command in Dired (dired-do-shell-command) works
677 similarly, using the file displayed on the current line.
679 *** A list of regexp default values is available via M-n for `occur',
680 `keep-lines', `flush-lines' and `how-many'. This list includes the active
681 region in transient-mark-mode, the word under the cursor, the last Isearch
682 regexp, the last Isearch string and the last replacement regexp.
684 *** When enable-recursive-minibuffers is non-nil, operations which use
685 switch-to-buffer (such as C-x b and C-x C-f) do not fail any more when
686 used in a minibuffer or a dedicated window. Instead, they fallback on
687 using pop-to-buffer, which will use some other window. This change
688 has no effect when enable-recursive-minibuffers is nil (the default).
690 *** Isearch started in the minibuffer searches in the minibuffer history.
691 Reverse Isearch commands (C-r, C-M-r) search in previous minibuffer
692 history elements, and forward Isearch commands (C-s, C-M-s) search in
693 next history elements. When the reverse search reaches the first history
694 element, it wraps to the last history element, and the forward search
695 wraps to the first history element. When the search is terminated, the
696 history element containing the search string becomes the current.
698 *** The variable read-file-name-completion-ignore-case overrides
699 completion-ignore-case for file name completion.
701 *** The variable read-buffer-completion-ignore-case overrides
702 completion-ignore-case for buffer name completion.
704 *** The new command `minibuffer-force-complete' chooses one of the
705 possible completions, rather than stopping at the common prefix.
707 *** If `completion-auto-help' is `lazy', Emacs shows the completions
708 buffer only on the second attempt to complete. This was already
709 supported in `partial-completion-mode'.
713 *** S-down-mouse-1 now pops up a menu for changing the font and text
714 size of the default face in the current buffer. The face is changed
715 via face remapping (see Lisp changes, below).
717 *** New commands to change the default face size in the current buffer.
718 To increase it, type `C-x C-+' or `C-x C-='. To decrease it, type
719 `C-x C--'. To restore the default (global) face size, type `C-x C-0'.
720 These work via Text Scale mode, a new minor mode.
722 The final key in the above commands may be repeated without the
723 leading `C-x', e.g. `C-x C-= C-= C-=' increases the face height by
724 three steps. Each step scales the height of the default face by the
725 value of the variable `text-scale-mode-step'.
727 *** The commands buffer-face-mode and buffer-face-set can be used to
728 remap the default face in the current buffer. See "Buffer Face mode",
729 under New Modes and Packages.
731 ** Primary selection changes
733 *** You can disable kill ring commands from accessing the primary
734 selection by setting `x-select-enable-primary' to nil.
736 ** Continuation lines can now be wrapped at word boundaries
737 (word-wrapping). This is controlled by the new per-buffer variable
738 `word-wrap'. Word wrapping does not take place if continuation lines
739 are not shown, e.g. if truncate-lines is non-nil. The most convenient
740 way to enable word-wrapping is using the new minor mode Visual Line
741 mode; in addition to setting `word-wrap' to t, this rebinds some
742 editing commands to work on screen lines rather than text lines. See
743 New Modes and Packages, below.
745 ** Window management changes
747 *** truncate-partial-width-windows now accepts integer values, which
748 specify a minimum window width for partial-width windows, below which
749 lines are truncated. The default has been changed to 50.
751 *** The new command balance-windows-area balances windows both
752 vertically and horizontally.
754 *** pop-to-buffer now always sets input focus when the popped-to window
755 is on a different frame.
757 ** Miscellaneous changes:
759 *** C-l is bound to the new command recenter-top-bottom, rather than recenter.
760 This moves the current line to window center, top and bottom on
761 successive invocations.
763 *** scroll-preserve-screen-position also preserves the column position.
765 *** If `yank-pop-change-selection' is t, rotating the kill ring also
766 updates the selection or clipboard to the current yank, just as M-w
767 would do so with the text it copies to the kill ring.
769 *** C-M-% now shows replacement as it would look in the buffer, with
770 `\N' and `\&' substituted according to the match. Old behavior can be
771 restored by customizing `query-replace-show-replacement'.
773 *** The command shell prompts for the default directory, when it is
774 called with a prefix and the default directory is a remote file name.
775 This is because some file name handlers (like ange-ftp) are not able to
776 run processes remotely.
778 *** The new command kill-matching-buffers kills buffers whose name
781 *** The value of comment-style now defaults to `indent'.
782 Thefore, comment-start markers are inserted at the current indentation
783 of the region to comment, rather than the leftmost column.
785 *** The new commands `pp-macroexpand-expression' and
786 `pp-macroexpand-last-sexp' pretty-print macro expansions.
788 *** The new command `set-file-modes' allows to set file's mode bits.
789 The mode bits can be specified in symbolic notation, like with GNU
790 Coreutils, in addition to an octal number. `chmod' is a new
791 convenience alias for this function.
793 *** `next-error-recenter' specifies how next-error should recenter the
794 visited source file. Its value can be a number (for example, 0 for
795 top line, -1 for bottom line), or nil for no recentering.
797 *** When typing in a password in the echo area, C-y yanks the current
798 kill into the password.
800 *** Tooltip frame parameters `font' and `color' in `tooltip-frame-parameters'
801 are ignored. Customize the `tooltip' face instead.
803 *** `mkdir' is a new convenience alias for `make-directory'.
805 * New Modes and Packages in Emacs 23.1
807 ** Auto Composition Mode is a minor mode that composes characters
808 automatically when they are displayed. It is globally on by default.
809 It uses `auto-composition-function' (default `auto-compose-chars').
811 ** Bubbles, a new game, is similar to SameGame.
813 ** Buffer Face mode is a minor mode for remapping the default face in
814 the current buffer. The variable `buffer-face-mode-face' specifies
815 the face to remap to. The command `buffer-face-set' prompts for a
816 face name, sets `buffer-face-mode-face' to it, and enables
817 buffer-face-mode. See "Face changes", under Editing Changes, for a
818 description of face remapping.
820 ** butterfly flips the desired bit on the drive platter.
821 See http://xkcd.com/378/
823 ** bug-reference.el provides clickable links to bug reports.
825 ** dbus.el provides D-Bus language bindings.
826 D-Bus is an inter-process communication mechanism for applications
827 residing on the same host. See the manual for details.
829 ** DocView mode allows viewing of PDF, PostScript and DVI documents.
830 One can also search for a regular expression in the document. For
831 details, see the commentary in doc-view.el.
833 PDF and DVI files are now opened in Doc View mode by default.
835 In Postcript mode, C-c C-c launches Doc View minor mode for viewing
838 ** EasyPG provides an interface to the GNU Privacy Guard (GnuPG).
839 It includes a GnuPG keyring browser, cryptographic operations on
840 regions and files, and automatic encryption of *.gpg files. For
841 details, see the EasyPG Assistant User's Manual.
843 ** json.el is a library for parsing and generating JSON
844 (JavaScript Object Notation), a lightweight data-interchange format.
846 ** linum.el is a new minor mode to display line numbers for the
849 ** mairix.el is an interface to mairix, a free tool for indexing and
850 searching locally stored mail. It allows you to query mairix and
851 display the search results with Rmail, Gnus and VM. Note that there
852 is an existing Gnus back end, nnmairix.el, which should be used with
855 ** minibuffer-depth-indicate-mode shows the minibuffer depth in the prompt.
858 This is a new mode for editing XML documents. It allows a schema to
859 be associated with the XML document being edited, using Relax NG as
860 the schema language. The schema is used to provide two key features:
862 *** Continuous validation. nXML validates as you type, highlighting
863 any invalid parts of your document.
865 *** Completion. nXML can assist you in entering an element name,
866 attribute name or data value by using information about what is
867 allowed by the schema in that context.
869 ** proced.el provides a Dired-like interface for operating on
870 processes. Proced makes an Emacs buffer containing a listing of the
871 current processes. You can use the normal Emacs commands to move
872 around in this buffer, and special Proced commands to operate on the
873 processes listed. It is currently only functional on GNU/Linux,
874 MS-Windows and Solaris.
876 ** Remember Mode is a mode for jotting down things to remember.
877 Notes can be saved to a Diary file. For details, see the Remember
880 ** RST mode is a major mode for editing reStructuredText files.
882 ** Ruby mode is a major mode for Ruby files.
884 ** Visual Line mode provides support for editing by visual lines.
885 It turns on word-wrapping in the current buffer, and rebinds C-a, C-e,
886 and C-k to commands that operate by visual lines instead of logical
887 lines. This is a more reliable replacement for longlines-mode.
888 This can also be turned on using the menu bar, via
889 Options -> Line Wrapping in this Buffer -> Word Wrap
891 ** xesam.el is an implementation of Xesam, an interface to (desktop)
892 search engines like Beagle, Strigi, and Tracker. The Xesam API
893 requires D-Bus for communication.
895 ** zeroconf.el offers service discovery and service publishing
896 interfaces according to the zeroconf specification. It communicates
897 with Avahi, a zeroconf implementation, via D-Bus messages on systems
898 which have installed this software.
900 ** There is a new `whitespace' package.
901 (The pre-existing one has been renamed to `old-whitespace'.)
902 Now, besides reporting bogus blanks, the whitespace package has a
903 minor mode and a global minor mode to visualize blanks (TAB, (HARD)
904 SPACE and NEWLINE). The visualization is made via faces and/or display
905 table. It can also indicate lines that extend beyond a given column,
906 trailing blanks, and empty lines at the start or end of a buffer.
907 See `whitespace-style' for more details. The `whitespace-action' option
908 specifies what to do when a buffer is visited, killed, or written.
911 * Changes in Specialized Modes and Packages in Emacs 23.1
913 ** Abbrev has been rewritten in Elisp and extended with more flexibility.
915 *** New functions: abbrev-get, abbrev-put, abbrev-table-get, abbrev-table-put,
916 abbrev-table-p, abbrev-insert, abbrev-table-menu.
918 *** Special hook `abbrev-expand-functions' obsoletes `pre-abbrev-expand-hook'.
920 *** `make-abbrev-table', `define-abbrev', `define-abbrev-table' all take
921 extra arguments for arbitrary properties.
923 *** New variable `abbrev-minor-mode-table-alist'.
925 *** `local-abbrev-table' can hold a list of abbrev-tables.
927 *** Abbrevs have now the following special properties:
928 `:count', `:system', `:enable-function', `:case-fixed'.
930 *** Abbrev-tables have now the following special properties:
931 `:parents', `:case-fixed', `:enable-function', `:regexp',
932 `abbrev-table-modiff'.
936 *** `apropos-library' describes the elements defined in a given library.
938 *** Set `apropos-compact-layout' is you want a more compact (but wider) layout.
940 ** Archive Mode has basic support to browse Rar archives.
941 Note, however, that the free version of the unrar command only handles
942 versions 1 and 2 of the Rar format.
946 *** New command `bibtex-initialize' (re)initializes BibTeX buffers.
948 *** New `bibtex-entry-format' options `whitespace', `braces', and
949 `string', disabled by default.
951 *** New variable `bibtex-cite-matcher-alist' contains rules to
952 identify cited keys in BibTeX entries, used by `bibtex-find-crossref'.
954 *** Command `bibtex-url' allows multiple URLs per entry.
956 ** Calendar and diary
958 *** There is a new date style, `iso', essentially year/month/day.
959 The variable `european-calendar-style' is obsolete - use `calendar-date-style'.
960 Similarly, the commands `american-calendar' and `european-calendar'
961 should be replaced by `calendar-set-date-style'.
963 *** The calendar namespace has been rationalized.
964 All functions and variables now begin with a `calendar-', `diary-', or
965 `holiday-' prefix. The various calendar systems have secondary
966 prefixes, eg `calendar-french-'. The old names you are likely to use
967 directly still exist, for the time being, as aliases, but please start
970 *** The whitespace in the calendar layout can be customized.
972 calendar-left-margin, calendar-intermonth-spacing, calendar-column-width,
973 calendar-day-header-width, and calendar-day-digit-width.
975 *** Text (e.g. ISO weeks) can be displayed between the calendar months.
976 See the variables calendar-intermonth-header and calendar-intermonth-text.
978 *** The function `holiday-chinese' computes holidays on the Chinese calendar.
979 It has been used to add items to the list `holiday-oriental-holidays'.
981 *** `diary-remind' accepts a negative number -DAYS as a shorthand for
982 the list (1 2 ... DAYS).
986 *** The new command C-c C-f (change-log-find-file) finds the file
987 associated with the current log entry.
989 *** The new command C-c C-c (change-log-goto-source) goes to the
990 source code associated with a log entry.
992 ** Compile and grep modes
994 *** The mode-line entry for the *compilation* and *grep* buffer is color coded.
995 It has different colors for to show that: (a) the command is still
996 running, (b) successful completion, (c) error.
998 *** compilation-auto-jump-to-first-error tells `compile' to jump to
999 the first error encountered during compilations.
1001 *** compilation-scroll-output accepts a new value, `first-error', which
1002 says to stop auto scrolling at the first error that occurs.
1004 *** The `cc' alias for C++ files in `grep-file-aliases' has been
1005 improved. `hh' can be used to match C++ header files and `cchh' both
1006 C++ sources and headers.
1010 *** You can specify your copyright holders' names.
1011 Only copyright lines with holders matching `copyright-names-regexp' are
1012 considered for update.
1014 *** Copyrights can be at the end of the buffer.
1015 This is controlled by `copyright-at-end-flag' (used by, e.g., change-log-mode).
1019 *** defcustom accepts new keyword arguments, `:safe' and `:risky', which
1020 set a variable's `safe-local-variable' and `risky-local-variable' property.
1024 *** diff-refine-hunk highlights word-level details of changes in a diff hunk.
1025 It's used automatically as you move through hunks, see
1026 diff-auto-refine-mode. It is bound to `C-c C-b'.
1028 *** diff-add-change-log-entries-other-window iterates through the diff
1029 buffer and tries to create ChangeLog entries for each change.
1030 It is bound to `C-x 4 A'.
1032 *** Turning on `whitespace-mode' in a diff buffer will show trailing
1033 whitespace problems in the modified lines.
1037 *** In Dired, C-x C-q now runs the command wdired-change-to-wdired-mode,
1038 and C-x C-q in wdired-mode exits it with asking a question about
1041 *** `&' runs the command `dired-do-async-shell-command' that executes
1042 the command asynchronously without the need to manually add ampersand
1043 to the end of the command. Its output appears in the buffer `*Async Shell
1046 *** `M-s f C-s' and `M-s f M-C-s' run Isearch that matches only at file names.
1047 When a new user option `dired-isearch-filenames' is t, then even ordinary
1048 Isearch started with `C-s' and `C-M-s' matches only at file names in the
1049 Dired buffer. When `dired-isearch-filenames' is `dwim' then activation of
1050 file name Isearch depends on the position of point - if point is on a file
1051 name initially, then Isearch matches only file names, otherwise it matches
1052 everywhere in the Dired buffer. You can toggle file names matching on or
1053 off by typing `M-s f' in Isearch mode.
1055 *** `M-s a C-s' and `M-s a M-C-s' run multi-file Isearch on the marked files.
1056 They visit the first marked file in the sequence and display the usual Isearch
1057 prompt for a string or a regexp where all Isearch commands are available.
1059 *** `Q' in Dired provides two new keys for multi-file replacement.
1060 The upper case key `Y' replaces all remaining matches in all remaining files
1061 with no more questions. The upper case key `N' stops doing replacements
1062 in the current file and skips to the next file. These multi-file keys
1063 are available for all commands that use `tags-query-replace'
1064 including `dired-do-query-replace-regexp', `vc-dir-query-replace-regexp',
1065 `reftex-query-replace-document'.
1069 *** The line length of fixed-form Fortran is not fixed at 72 any more.
1070 Customize the variable `fortran-line-length' to change it.
1072 *** In Fortran mode, M-; is now bound to the standard comment-dwim,
1073 rather than fortran-indent-comment.
1075 *** (The increasingly misnamed) F90 mode supports Fortran 2003 syntax.
1079 *** The Gnus package has been updated
1080 There are many news features, bug fixes and improvements; see the file
1081 GNUS-NEWS or the node "No Gnus" in the Gnus manual for details.
1083 *** In Emacs 23, Gnus uses Emacs' new internal coding system `utf-8-emacs' for
1084 saving articles drafts and ~/.newsrc.eld. These file may not be read
1085 correctly in Emacs 22 and below. If you want to Gnus across different Emacs
1086 versions, you may set `mm-auto-save-coding-system' to `emacs-mule'.
1088 *** Passwords are consistently loaded through `auth-source'
1089 Gnus can use `auth-source' for POP and IMAP passwords. Also see that
1090 `smtpmail' and `url' support `auth-source' for SMTP and HTTP/HTTPS/RSS
1091 authentication respectively.
1095 *** New macro `with-help-window' should set up help windows better
1096 than `with-output-to-temp-buffer' with `print-help-return-message'.
1098 *** New option `help-window-select' permits to customize whether help
1099 window shall be automatically selected when invoking help.
1101 *** New variable `help-window-point-marker' permits one to specify a new
1102 position for point in help window (for example in `view-lossage').
1106 *** New command `isearch-forward-word' bound globally to `M-s w' starts
1107 incremental word search. New command `isearch-toggle-word' bound to the
1108 same key `M-s w' in Isearch mode toggles word searching on or off
1109 while Isearch is active.
1111 *** New command `isearch-highlight-regexp' bound to `M-s h r' in Isearch
1112 mode runs `highlight-regexp' (`hi-lock-face-buffer') with the current
1113 search string as its regexp argument. The same key `M-s h r' and
1114 other keys on the `M-s h' prefix are bound globally to the command
1115 `highlight-regexp' and other hi-lock commands.
1117 *** New command `isearch-occur' bound to `M-s o' in Isearch mode
1118 runs `occur' with the current search string. The same key `M-s o'
1119 is bound globally to the command `occur'.
1121 *** Isearch can now search through multiple ChangeLog files.
1122 When running Isearch in a ChangeLog file, if the search fails,
1123 then another C-s tries searching the previous ChangeLog,
1124 if there is one (e.g. going from ChangeLog to ChangeLog.12).
1125 This is enabled if multi-isearch-search is non-nil.
1127 *** Two new commands to start Isearch on a list of marked buffers
1128 for buff-menu.el and ibuffer.el are bound to the keys `M-s a C-s' and
1131 *** The part of an Isearch that failed to match is highlighted in
1132 `isearch-fail' face.
1134 *** `C-h C-h' in Isearch mode displays isearch-specific Help screen,
1135 `C-h b' displays all Isearch key bindings, `C-h k' displays the full
1136 documentation of the given Isearch key sequence, `C-h m' displays
1137 documentation of Isearch mode. All the rest Help commands exit Isearch mode
1138 and execute their global definitions.
1140 *** When started in the minibuffer, Isearch searches in the minibuffer
1141 history. See `Minibuffer changes', above.
1145 *** Upgraded to MH-E version 8.2. See MH-E-NEWS for details.
1148 *** The file etc/emacs.py now supports both Python 2 and 3, meaning
1149 that either version can be used as inferior Python by python.el.
1151 *** Python mode now has `pdbtrack' functionality. When using pdb to
1152 debug a Python program, pdbtrack notices the pdb prompt and displays
1153 the source file and line that the program is stopped at, much the same
1154 way as gud-mode does for debugging C programs with gdb.
1158 *** The default value of `recentf-keep' prevents from checking of
1159 remote files, if there is no established connection to the
1160 corresponding remote host.
1164 *** Rmail no longer converts the messages to Babyl format.
1165 Instead, it uses UNIX mbox format, both on disk and in Rmail buffers,
1166 and does conversion and decoding when a message is displayed.
1168 The first time you visit an Rmail file in Babyl format, Rmail
1169 automatically converts it to mbox format. This is a one-time
1170 conversion, but it can take a few minutes, depending on how fast is
1171 your machine and on the size of the file. You should find the rest of
1172 Rmail usage unaltered.
1174 However, M-x set-rmail-inbox-list now lasts only for one session
1175 because there is no way to save the list of inbox files in an
1178 Also, whereas with Babyl format M-x find-file would switch to Rmail
1179 mode, with mbox format this is no longer the case (there being no way
1180 to add an "-*- rmail-*-" cookie to an mbox file). Use C-u M-x rmail
1183 If you have written any extensions to Rmail, they are likely to need
1184 updating. Conceptually, the Rmail buffer that you see is no longer
1185 just a narrowed portion of the whole. So you cannot access the whole
1186 of a message (or message collection) by a simple save-restriction and
1187 widen. Instead, there are two buffers: the rmail-buffer, and the
1188 rmail-view-buffer. The former is the buffer that you see, the latter
1189 is invisible. Most of the time, the invisible `view' buffer contains
1190 the full contents of the Rmail file, and the Rmail buffer contains a
1191 decoded copy of the current message (with only a subset of the
1192 headers). In this state, Rmail is said to be `swapped'.
1194 You may find the following functions useful:
1196 `rmail-get-header' and `rmail-set-header' get or set the value of a
1197 message header, whether or not it is currently visible.
1199 `rmail-apply-in-message' is a general purpose function that calls a
1200 function (with arguments) which you specify on the full text of a given
1201 message. To further narrow to just the headers, search forward for "\n\n".
1203 *** The new command `rmail-mime' displays MIME messages.
1204 It is bound to `v' in Rmail buffers and summaries. It displays plain
1205 text and multipart messages in a temporary buffer, and offers buttons
1206 to save attachments.
1208 *** The command `rmail-redecode-body' no longer accepts the optional arg RAW.
1209 Since Rmail now holds messages in their original undecoded form in a
1210 separate buffer, `rmail-redecode-body' no longer encodes the original
1211 message, and therefore there should be no need to avoid encoding it.
1213 *** The o command is now `rmail-output'. It is an all-purpose command
1214 for copying messages from Rmail and appending them to files. It
1215 handles Babyl-format files as well as mbox-format files, and it
1216 handles both kinds properly when they are visited in Emacs. It always
1217 copies the full headers of the message.
1219 *** The C-o command is now `rmail-output-as-seen'. It uses
1220 the message as displayed, appending it to an mbox file.
1222 *** The modified status of the Rmail buffer is reported in the mode-line.
1223 Previously, this information was hidden.
1227 *** New option latex-indent-within-escaped-parens
1228 permits to customize indentation of LaTeX environments delimited
1233 *** If the gpm mouse server is running and t-mouse-mode is enabled,
1234 Emacs uses a Unix socket in a GNU/Linux console to talk to server,
1235 rather than faking events using the client program mev. This C level
1236 approach provides mouse highlighting and help echoing in the
1241 *** New connection methods.
1242 The new methods "plinkx", "plink2", "psftp", "sftp" and "fish" have
1243 been introduced. There are also new so-called gateway methods
1244 "tunnel" and "socks".
1247 IPv6 addresses are supported now as host names. They must be embedded
1248 in square brackets, like in "/ssh:[::1]:".
1250 *** Multihop syntax has been removed.
1251 The pseudo-method "multi" has been removed. Instead, multi hops
1252 can be specified by the new variable `tramp-default-proxies-alist'.
1254 *** More default settings.
1255 Default values can be set via the variables `tramp-default-user',
1256 `tramp-default-user-alist' and `tramp-default-host'.
1258 *** Connection information is cached.
1259 In order to reduce connection setup, information about used
1260 connections is kept persistently in a file. The name of this file is
1261 defined in the variable `tramp-persistency-file-name'.
1263 *** Control of remote processes.
1264 Running processes on a remote host can be controlled by settings in
1265 `tramp-remote-path' and `tramp-remote-process-environment'.
1267 *** Success of remote copy is checked.
1268 When the variable `file-precious-flag' is set, the success of a remote
1269 file copy is checked via the file's checksum.
1271 *** Passwords can be read from an authentification file.
1272 Tramp uses the package `auth-source' to read passwords from a file, if
1275 ** VC and related modes
1277 *** VC now supports applying VC operations to a set of files at a time.
1278 This enables VC to work much more effectively with changeset-oriented
1279 version-control systems such as Subversion, GNU Arch, Mercurial, Git
1280 and Bzr. VC will now pass a multiple-file commit to these systems as
1283 *** vc-dir is a new command that displays file names and their VC
1284 status. It allows to apply various VC operations to a file, a
1285 directory or a set of files/directories.
1287 *** VC switches are no longer appended, rather the first non-nil value is used.
1288 (This was for the most part true in Emacs 22, but was not advertised).
1289 This is because there is an increasing variety of VC systems, and they
1290 do not all accept the same "common" options. For example, a CVS diff
1291 command used to append the values of `vc-cvs-diff-switches',
1292 `vc-diff-switches', and `diff-switches'. Now the first non-nil value
1293 from that sequence is used. The special value `t' means "no switches".
1295 *** Clicking on the VC mode-line entry now pops the VC menu.
1297 *** The VC mode-line entry now has a tooltip that explains the VC file status.
1299 *** In VC Annotate mode, the key bindings have changed to use lower
1300 case keys instead of the upper case keys used in the past.
1302 *** In VC Annotate mode, for VC systems that support changesets, you can
1303 see the diff for the whole changeset (not only for the current file)
1304 by typing the D key. Using the "Show changeset diff of revision at
1305 line" menu entry does the same thing.
1307 *** In VC Annotate mode, you can type v to toggle the annotation visibility.
1309 *** In VC Annotate mode, you can type f to show the file revision on
1312 *** Asynchronous VC commands display [Waiting...] in the mode-line
1313 of the corresponding buffer as long as the asynchronous process is
1316 *** Log entries can be modified using the key "e" in log-view.
1317 For now only CVS, RCS, SCCS and SVN support this functionality.
1318 This is done by the `modify-change-comment' backend function.
1320 *** In log-view-mode, for VC systems that support changesets, you can
1321 see the diff for the whole changeset (not only for the current file)
1322 by typing the D key or using the "Changeset Diff" menu entry.
1324 *** In Log Edit mode, C-c C-d now shows the diff for the files involved.
1326 *** vc-git supports the "git grep" command.
1328 *** VC Support for Meta-CVS has been removed for lack of a maintainer able
1329 to update it to the new VC.
1333 *** comint-mode uses `start-file-process' now (see Lisp Changes).
1334 If `default-directory' is a remote file name, subprocesses are started
1335 on the corresponding remote system.
1337 *** Eldoc highlights the function argument under point
1338 with the face `eldoc-highlight-function-argument'.
1340 *** In Etags, the --members option is now the default.
1341 Use --no-members if you want the old default behavior of not tagging
1342 struct members in C, members variables in C++ and variables in PHP.
1344 *** The `gdb' command only works with the graphical interface now.
1345 Use `gud-gdb' if you want the (old) text command mode.
1347 *** goto-address.el provides two new minor modes, goto-address-mode and
1348 goto-address-prog-mode, which buttonize URLS and email addresses.
1350 *** The new command `eshell/info' runs info in an eshell buffer.
1352 *** The new variable `ffap-rfc-directories' specifies a list of local
1353 directories in which `ffap-rfc' will first search for RFCs.
1355 *** hide-ifdef-mode allows shadowing ifdef-blocks instead of hiding them.
1356 See option `hide-ifdef-shadow' and function `hide-ifdef-toggle-shadowing'.
1358 *** `icomplete-prospects-height' now supercedes `icomplete-prospects-length'.
1360 *** Info displays breadcrumbs in the header of the page.
1361 See Info-breadcrumbs-depth to control it.
1363 *** net-utils has an `iwconfig' command, similar to the existing `ifconfig'.
1364 It is used to configure wireless interfaces.
1366 *** The pcmpl-unix package supports hostname completion for ssh and scp.
1368 *** sgml-electric-tag-pair-mode lets you simultaneously edit matched tag pairs.
1370 *** smerge-refine highlights word-level details of changes in conflict.
1371 It's used automatically as you move through conflicts, see
1372 smerge-auto-refine-mode.
1374 *** talk.el has been extended for multiple tty support.
1376 *** A new command `display-time-world' has been added to the Time
1377 package. It creates a buffer with an updating time display using
1380 *** The appearance of superscript and subscript in TeX is more customizable.
1381 See the documentation of the variables: tex-fontify-script,
1382 tex-font-script-display, tex-suscript-height-ratio, and
1383 tex-suscript-height-minimum.
1385 *** view-remove-frame-by-deleting is now by default t
1386 since users found iconification of view-mode frames distracting.
1388 *** WoMan tries to add locale-specific manual page directories to the
1389 search path. This can be disabled by setting `woman-locale' to nil.
1392 * Changes in Emacs 23.1 on non-free operating systems
1394 ** Case is now considered significant in completion on MS-Windows.
1395 The default value of `completion-ignore-case' is now nil on
1396 MS-Windows, the same as it is for other operating systems. The
1397 variable doesn't apply to reading a file name -- in that case Emacs
1398 heeds `read-file-name-completion-ignore-case' instead.
1400 ** IPv6 is supported on MS-Windows.
1401 Emacs now supports IPv6 on Windows XP and later, and earlier versions
1402 of Windows with third party IPv6 stacks installed. In Emacs 22, IPv6 was
1403 supported on other platforms, but not on Windows due to using the winsock
1404 1.1 header file, even though Emacs was linking to the winsock 2 library.
1406 ** Busy cursor (hourglass) now displays on MS-Windows.
1407 When Emacs is busy, an hourglass mouse cursor is displayed on Windows.
1408 In Emacs 22 only X supported the busy cursor.
1410 ** Battery status is available on MS-Windows
1411 Emacs can now display the battery status in the mode-line when enabled with
1412 display-battery-mode or from the Options menu. More verbose battery
1413 information is also available with the command `battery'. In Emacs 22
1414 battery status was supported only on GNU/Linux and Mac.
1416 ** More keys available on MS-Windows.
1417 Keys normally associated with IMEs, and some exotic keys not normally found
1418 on standard keyboards have been given names so they can be bound to functions
1419 inside Emacs. If there are keys on your keyboard that have not been exposed
1420 to Emacs in the past, try C-h k to see if they are available now.
1422 Emacs can now bind functions to the extra buttons for media player and
1423 browser control present on some keyboards. These buttons are disabled
1424 by default, since enabling them prevents their system-wide use when
1425 Emacs has focus. To enable them, set the variable
1426 w32-pass-multimedia-buttons to nil. See the doc string of that variable
1427 for the list of extra keys that are available.
1429 ** BDF fonts no longer supported on MS-Windows.
1430 The font backend was completely rewritten for this release. The focus
1431 on Windows has been getting acceptable performance and full unicode
1432 support, including complex script shaping for native Windows fonts. A
1433 rewrite of the BDF font support has not happened due to lack of time
1434 and developers. If demand still exists for such a backend even with
1435 the improved language support for native Windows fonts, future
1436 development in this direction will most likely be based on the
1437 freetype library, giving access to a wider range of font formats.
1440 * Incompatible Lisp Changes in Emacs 23.1
1442 ** Variables cannot be both buffer-local and frame-local any more.
1444 ** `functionp' returns nil for special forms.
1445 I.e., it only returns t for objects that can be passed to `funcall'.
1447 ** The behavior of map-char-table has changed. It may call the
1448 specified function with a cons (FROM . TO) as a key if characters in
1449 that range have the same value.
1453 *** The function `dired-call-process' has been removed.
1455 *** The multibyteness of process filters is now determined by the
1456 coding-system used for decoding. The functions
1457 `process-filter-multibyte-p' and `set-process-filter-multibyte' are
1460 ** The variable `byte-compile-warnings' can now be a list starting with `not',
1461 meaning to disable the specified warnings. The meaning of this list
1462 may therefore be the reverse of what you expect (of course, this is
1463 only an issue if you make use of the new `not' syntax). Rather than
1464 checking/manipulating elements directly, use the new functions
1465 `byte-compile-warning-enabled-p', `byte-compile-disable-warning', and
1466 `byte-compile-enable-warning.'
1468 ** `mode-name' is no longer guaranteed to be a string.
1469 Use `(format-mode-line mode-name)' to ensure a string value.
1471 ** The function x-font-family-list has been removed.
1472 Use the new function font-family-list (see Lisp Changes, below).
1474 ** Internationalization changes
1476 *** The value of the function `charset-id' is now always 0.
1478 *** The functions `register-char-codings' and `coding-system-spec'
1481 *** The cpXXX coding systems are now supported automatically.
1482 The functions cp-...-codepage, which you had to use in Emacs 22 to
1483 enable support for these coding systems, have been deleted.
1485 *** The following features have been removed. They were used for
1486 displaying various scripts with specific fonts, and are no longer
1487 needed now that OpenType font support is available:
1489 **** `devanagari' and `devan-util', and all associated devanagari-* and
1490 dev-* functions and variables (formerly used for Devanagari script).
1492 **** `kannada' and `knd-util', and all associated kannada-* and knd-*
1493 functions and variables (formerly used for Kannada script).
1495 **** `malayalam' and `mlm-util', and all associated malayalam-* and
1496 mlm-* functions and variables (formerly used for Malayalam script).
1498 **** `tamil' and `tml-util, and all associated tamil-* and tml-*
1499 functions and variables (formerly used for Tamil script).
1501 *** The meaning of NAME argument of `set-fontset-font' is changed.
1502 Previously nil is accepted as the default fontset. Now, nil is for
1503 the fontset of the selected frame and t is for the default fontset.
1505 *** The meaning of FONTSET argument of `print-fontset' is changed.
1506 Now, nil is for the fontset of the selected frame and t is for the
1509 ** If a function in write-region-annotate-functions returns with a
1510 different buffer current, Emacs no longer kills that buffer
1511 automatically. This behavior existed in previous versions of Emacs,
1512 but was undocumented. To kill a buffer after write-region, give the
1513 variable `write-region-post-annotation-function' a buffer-local value
1516 ** The variable temp-file-name-pattern has been removed.
1517 This variable was only used by call-process-region, which now uses
1518 temporary-file-directory instead.
1520 ** The COUNT and SYSTEM-FLAG arguments to define-abbrev have been
1521 removed. The function now takes extra arguments for specifying
1522 arbitrary abbrev properties.
1524 ** end-of-defun-function is now guaranteed to work only when called
1525 from the start of a defun. It must now leave point exactly at the end
1526 of defun, since `end-of-defun' now itself moves forward over
1527 whitespace after calling it.
1530 * Lisp Changes in Emacs 23.1
1532 ** The new variable `generate-autoload-cookie' controls the magic comment
1533 string used by `update-file-autoloads' to find autoloaded forms. The
1534 variable `generated-autoload-file' similarly controls the name of the
1535 file where `update-file-autoloads' writes the calls to `autoload'.
1536 The default values are ";;;###autoload" and `loaddefs.el',
1539 ** New primitives `list-system-processes' and `process-attributes'
1540 let Lisp programs access the processes that are running on the local
1541 machine. See the doc strings of these functions for more details.
1542 Not all platforms support accessing this information; on those that
1543 don't, these primitives will return nil.
1545 ** New variable `user-emacs-directory'.
1546 Use this instead of "~/.emacs.d".
1548 ** If a local hook function has a non-nil `permanent-local-hook'
1549 property, `kill-all-local-variables' does not remove it from the local
1550 value of the hook variable; it remains even if you change major modes.
1552 ** `frame-inherited-parameters' lets new frames inherit parameters from
1555 ** New keymap `input-decode-map' overrides like key-translation-map, but
1556 applies before function-key-map. Also it is terminal-local contrary to
1557 key-translation-map. Terminal-specific key-sequences are generally added to
1558 this map rather than to function-key-map now.
1560 ** `ignore-errors' is now a standard macro (does not require the CL package).
1562 ** `interprogram-paste-function' can now return one string or a list
1563 of strings. In the latter case, Emacs puts the second and following
1564 strings on the kill ring.
1566 ** In `condition-case', a handler can specify "let the debugger run first".
1567 You do this by writing `debug' in the list of conditions to be handled,
1572 ((debug error) nil))
1574 ** clone-indirect-buffer now runs the clone-indirect-buffer-hook.
1576 ** `beginning-of-defun-function' now takes one argument, the count given to
1577 `beginning-of-defun'. (N.B. `end-of-defun-function' doesn't take any
1580 ** `file-remote-p' has new optional parameters IDENTIFICATION and CONNECTED.
1581 IDENTIFICATION specifies which part of the remote identifier has to be
1582 returned. With CONNECTED passed non-nil, it is checked whether a
1583 remote connection has been established already.
1585 ** The new macro `declare-function' suppresses compiler warnings about
1586 undefined functions.
1588 ** Changes to interactive function handling
1590 *** The new interactive spec code ^ says to first call
1591 handle-shift-selection if shift-select-mode is non-nil, before reading
1592 the command arguments. This is used for shift-selection (see above).
1594 *** Built-in functions can now have an interactive specification that
1595 is not a prompt string. If the `intspec' parameter of a `DEFUN'
1596 starts with a `(', the string is evaluated as a Lisp form.
1598 *** The interactive-form of a function can be added post-facto via the
1599 `interactive-form' symbol property. Mostly useful to add complex
1600 interactive forms to subroutines.
1604 *** Commands should use `use-region-p' to test whether there is
1605 an active region that they should operate on.
1607 *** `region-active-p' returns non-nil when Transient Mark mode is
1608 enabled and the mark is active. Most commands that act specially on
1609 the active region in Transient Mark mode should use `use-region-p'
1610 instead of `region-active-p', because `use-region-p' obeys the new
1611 user option `use-empty-active-region' (see Editing Changes, above).
1613 *** If a command sets `transient-mark-mode' to (only . OLDVAL), that
1614 means to activate transient-mark-mode temporarily, until the next
1615 unshifted point motion command or mark deactivation. Afterwards,
1616 reset transient-mark-mode to the value OLDVAL. The values `only' and
1617 `identity', introduced in Emacs 22, are now deprecated.
1619 ** Emacs session information
1621 *** The new variables `before-init-time' and `after-init-time' record the
1622 value of `current-time' before and after Emacs loads the init files.
1624 *** The new function `emacs-uptime' returns the uptime of an Emacs instance.
1626 *** The new function `emacs-init-time' returns the duration of the
1627 Emacs initialization.
1629 ** Changes affecting display-buffer
1631 *** display-buffer tries to be smarter when splitting windows.
1632 The new option split-window-preferred-function lets you specify your own
1633 function to pop up new windows. Its default value split-window-sensibly
1634 can split a window either vertically or horizontally, whichever seems
1635 more suitable in the current configuration. You can tune the behavior
1636 of split-window-sensibly by customizing split-height-threshold and the
1637 new option split-width-threshold. Both options now take the value nil
1638 to inhibit splitting in one direction. Setting split-width-threshold to
1639 nil inhibits horizontal splitting and gets you the behavior of Emacs 22
1640 in this respect. In any case, display-buffer may now split the largest
1641 window vertically even when it is not as wide as the containing frame.
1643 *** If pop-up-frames has the value `graphic-only', display-buffer only
1644 makes a separate frame on graphic displays.
1646 *** select-frame and set-frame-selected-window have a new optional
1647 argument NORECORD. If non-nil, this will avoid messing with the order
1648 of recently selected windows and the buffer list.
1650 ** Window parameters can now be defined.
1651 These are analogous to frame parameters, but are associated with
1654 *** The new functions window-parameters, window-parameter, and
1655 set-window-parameter are used to query and set window parameters.
1657 ** Minibuffer and completion changes
1659 *** A list of default values can be specified for the DEFAULT argument of
1660 functions `read-from-minibuffer', `read-string', `read-command',
1661 `read-variable', `read-buffer', `completing-read'. Elements of this list
1662 are available for inserting into the minibuffer by typing `M-n'.
1663 For empty input these functions return the first element of this list.
1665 *** New function `read-regexp' uses the regexp history and some useful
1666 regexp defaults (string at point, last Isearch/replacement regexp/string)
1667 via M-n when reading a regexp in the minibuffer.
1669 *** minibuffer-local-must-match-filename-map is now named
1670 minibuffer-local-filename-must-match-map.
1672 *** The `require-match' argument to `completing-read' accepts the new
1673 values `confirm-only' and `confirm-after-completion'.
1675 ** Search and replacement changes
1677 *** The regexp form \(?<num>:<regexp>\) specifies the group number explicitly.
1679 *** New function `match-substitute-replacement' returns the result of
1680 `replace-match' without actually using it in the buffer.
1682 *** The new variable `replace-search-function' determines the function
1683 to use for searching in query-replace and replace-string. The
1684 function it specifies is called by `perform-replace' when its 4th
1687 *** The new variable `replace-re-search-function' determines the
1688 function to use for searching in `query-replace-regexp',
1689 `replace-regexp', `query-replace-regexp-eval', and
1690 `map-query-replace-regexp'. The function it specifies is called by
1691 `perform-replace' when its 4th argument is non-nil.
1693 *** New keymap `search-map' bound to `M-s' provides global bindings
1694 for search related commands.
1696 *** New keymap `multi-query-replace-map' contains additonal keys bound
1697 to `automatic-all' and `exit-current' for multi-buffer interactive replacement.
1699 *** The variable `inhibit-changing-match-data', if non-nil, prevents
1700 the search and match primitives from changing the match data.
1702 *** New functions `word-search-forward-lax' and `word-search-backward-lax'.
1703 These are like `word-search-forward and `word-search-backward', except
1704 that the end of the search string need not match a word boundary,
1705 unless it ends in whitespace.
1707 ** File handling changes
1709 *** set-file-modes is now interactive and can take the mode value in
1710 symbolic notation thanks to auxiliary functions.
1712 *** file-local-variables-alist stores an alist of file-local
1713 variables defined in the current buffer.
1717 *** Each face can be remapped to a different face definition using the
1718 variable `face-remapping-alist'. This is an alist that maps faces to
1719 replacement definitions (which can be face names, lists of face names,
1720 or attribute/value plists. If this variable is buffer-local, the
1721 remapping occurs only in that buffer.
1723 *** text-scale-mode remaps the default face to a larger or smaller
1724 size in the current buffer. This feature is used by the Buffer Face
1725 menu and the new `C-x C-+', `C-x C--', and `C-x C-0' commands (see
1726 Editing Changes, above).
1730 **** `face-remap-add-relative' adds a face remapping entry to the
1733 **** ``face-remap-remove-relative' removes a face remapping entry from
1736 **** `face-remap-reset-base' restores a face to its global definition.
1738 **** `face-remap-set-base' sets the base remapping of a face.
1742 *** The new function `start-file-process' is similar to `start-process',
1743 but obeys file handlers. The file handler is chosen based on
1744 `default-directory'. The functions `start-file-process-shell-command'
1745 and `process-file-shell-command' are also new; they call internally
1746 `start-file-process' and `process-file', respectively.
1748 *** The new function `process-lines' executes an external program and
1749 returns its output as a list of lines.
1751 ** Character code, representation, and charset changes.
1753 *** In multibyte buffers and strings, characters are represented by
1754 UTF-8 byte sequences. The character code space is now 0x0..0x3FFFFF
1755 with no gap; code points 0x0..0x10FFFF are Unicode characters of the
1756 same code points, while code points 0x3FFF80..0x3FFFFF are raw 8-bit
1759 *** Generic characters no longer exist.
1761 *** The concept of a charset has changed. A single character may
1762 belong to multiple charsets (e.g. a-grave, U+00E0, belongs to charsets
1763 unicode, iso-8859-1, iso-8859-3, etc).
1765 **** The dimension of a charset is now 1, 2, 3, or 4, and the size of
1766 each dimension is no longer limited to 94 or 96.
1768 **** A dynamic charset priority list is used to infer the charset of
1769 characters for display.
1771 *** The functions `split-char' and `make-char' now accept up to 4
1772 positional codes instead of just 2.
1774 *** The functions `encode-char' and `decode-char' now accept any character sets.
1776 *** The function `define-charset' now accepts a completely different
1777 form of arguments (old-style arguments still work).
1779 *** The value of the function `char-charset' depends on the current
1780 priorities of charsets.
1782 *** The function get-char-code-property now accepts many Unicode base
1783 character properties. They are `name', `general-category',
1784 `canonical-combining-class', `bidi-class', `decomposition',
1785 `decimal-digit-value', `digit-value', `numeric-value', `mirrored',
1786 `old-name', `iso-10646-comment', `uppercase', `lowercase', and
1789 *** The functions `modify-syntax-entry' and `modify-category-entry' now
1790 accept a cons of characters as the first argument, and modify all
1791 entries in that range of characters.
1793 *** Use of `translation-table-for-input' for character code unification
1794 is now obsolete, since Emacs 23.1 and later uses Unicode as basis for
1795 internal representation of characters.
1799 **** `characterp' returns t if and only if the argument is a character.
1800 This replaces `char-valid-p', which is now obsolete.
1802 **** `max-char' returns the maximum character code (currently #x3FFFFF).
1804 **** `define-charset-alias' defines an alias of a charset.
1806 **** `set-charset-priority' sets priorities of charsets.
1808 **** `charset-priority-list' returns a prioritized list of charsets.
1810 **** `unibyte-string' makes a unibyte string from bytes.
1812 **** `define-char-code-property' defines a character code property.
1814 **** `char-code-property-description' returns the description string of
1815 a character code property.
1819 **** `find-word-boundary-function-table' is a char-table of functions to
1820 search for a word boundary.
1822 **** `char-script-table' is a char-table of script names.
1824 **** `char-width-table' is a char-table of character widths.
1826 **** `print-charset-text-property' controls how to handle `charset' text
1827 property on printing a string.
1829 **** `printable-chars' is a char-table of printable characters.
1831 ** Code conversion changes
1833 *** The new function `define-coding-system' should be used to define a
1834 coding system instead of `make-coding-system' (which is now obsolete).
1836 *** The functions `encode-coding-region' and `decode-coding-region'
1837 have an optional 4th argument to specify where the result of
1838 conversion should go.
1840 *** The functions `encode-coding-string' and `decode-coding-string'
1841 have an optional 4th argument specifying a buffer to store the result
1844 *** The new variable `inhibit-null-byte-detection' controls whether to
1845 consider text with null bytes as binary data. By default, it is
1846 `nil', and Emacs uses `no-conversion' for any text containing null
1849 *** The functions `set-coding-priority' and `make-coding-system' are obsolete.
1853 **** `with-coding-priority' executes Lisp code using the specified
1854 coding system priority order.
1856 **** `check-coding-systems-region' checks if the text in the region is
1857 encodable by the specified coding systems.
1859 **** `coding-system-aliases' returns a list of aliases of a coding system.
1861 **** `coding-system-charset-list' returns a list of charsets supported
1864 **** `coding-system-priority-list' returns a list of coding systems
1865 ordered by their priorities.
1867 **** `set-coding-system-priority' sets priorities of coding systems.
1869 **** `coding-system-from-name' returns a coding system matching with
1873 ** There is a new input method, Robin, different from Quail.
1874 It has three functionalities:
1875 i) a simple input method (converts an ASCII sequence into a string).
1876 ii) converts an existing buffer substring into another string
1877 iii) reverse conversion (each character produced by a
1878 robin rule can hold the original ASCII sequence as a char-code-property)
1880 *** The new function `robin-define-package' defines a Robin package.
1882 *** The new function `robin-modify-package' modifies an existing Robin package.
1884 *** The new function `robin-use-package' starts using a Robin package
1887 *** The new function `string-to-unibyte' is like `string-as-unibyte'
1888 but signals an error if STRING contains a non-ASCII, non-eight-bit
1891 ** Changes related to the new font backend
1893 *** Which font backends to use can be specified by the X resource
1894 "FontBackend". For instance, to use both X core fonts and Xft fonts:
1896 Emacs.FontBackend: x,xft
1898 If this resource is not set, Emacs tries to use all font backends
1899 available on your graphic device.
1901 *** New frame parameter `font-backend' specifies a list of
1902 font-backends supported by the frame's graphic device. On X, they are
1903 currently `x' and `xft'.
1905 *** The function `set-fontset-font' now accepts a script name as the
1906 second argument, and has an optional 5th argument to control how to
1911 **** `fontp' checks if the argument is a font-spec or font-entity.
1913 **** `font-spec' creates a new font-spec object.
1915 **** `font-get' returns a font property value.
1917 **** `font-put' sets a font property value.
1919 **** `font-face-attributes' returns a plist of face attributes set by a font.
1921 **** `list-fonts' returns a list of font-entities matching a font spec.
1923 **** `find-font' returns the font-entity best matching the given font spec.
1925 **** `font-family-list' returns a list of family names of available fonts.
1927 **** `font-xlfd-name' returns an XLFD name of a given font spec, font
1928 entity, or font object.
1930 **** `clear-font-cache' clears all font caches.
1932 ** Changes related to multiple-terminal (multi-tty) support
1934 *** $TERM is now set to `dumb' for subprocesses. If you want to know the
1935 $TERM inherited by Emacs you will have to look inside initial-environment.
1937 *** $DISPLAY is now dynamically inherited from the frame's `display'.
1939 *** The `window-system' variable is now frame-local. The new
1940 `initial-window-system' variable contains the `window-system' value
1941 for the first frame. `window-system' is also now a function that
1942 takes a frame argument.
1944 *** The `keyboard-translate-table' variable and the terminal and
1945 keyboard coding systems are now terminal-local.
1947 *** You can specify a terminal device (`tty' parameter) and a terminal
1948 type (`tty-type' parameter) to `make-terminal-frame'.
1950 *** The function `make-frame-on-display' now works during a tty
1953 *** A new `terminal' data type.
1954 The functions `get-device-terminal', `terminal-parameters',
1955 `terminal-parameter', `set-terminal-parameter' use this data type.
1957 *** Function key sequences are now mapped using `local-function-key-map',
1958 a new variable. This inherits from the global variable function-key-map,
1959 which is not used directly any more.
1963 **** before-hack-local-variables-hook is called after setting new
1964 variable file-local-variables-alist, and before actually applying the
1965 file-local variables.
1967 **** `suspend-tty-functions' and `resume-tty-functions' are called
1968 after a tty frame has been suspended or resumed, respectively. The
1969 functions are called with the terminal id of the frame being
1970 suspended/resumed as a parameter.
1972 **** The special hook `delete-terminal-functions' is called before
1973 deleting a terminal.
1977 **** `delete-terminal'
1983 *** `initial-environment' holds the environment inherited from Emacs's parent.
1985 ** Redisplay changes
1987 *** For underlined characters, the distance between the underline and
1988 the baseline is controlled by a new variable, `underline-minimum-offset'.
1990 *** You can now pass the value of the `invisible' property to
1991 invisible-p to check whether it would cause the text to be invisible.
1992 This is convenient when checking invisibility of text with no buffer
1993 position (e.g. in before/after-strings).
1995 *** `clear-image-cache' can be told to flush only images of a specific file.
1997 *** `vertical-motion' can now be given a goal column.
1998 It now accepts a cons cell (COLS . LINES) in its first argument, which
1999 says to stop, where possible, at a pixel x-position equal to COLS
2000 times the default column width.
2002 *** redisplay-end-trigger-functions, set-window-redisplay-end-trigger,
2003 and window-redisplay-end-trigger are obsolete. Use `jit-lock-register'
2006 *** The new variables `wrap-prefix' and `line-prefix' specify display
2007 specs which are appended at display-time to every continuation line
2008 and non-continuation line, respectively. In addition, Emacs
2009 recognizes the `wrap-prefix' and `line-prefix' text or overlay
2010 properties; these have the same effects as the variables of the same
2011 name, but take precedence.
2013 ** The Lisp interpreter now treats non-breaking space as whitespace.
2015 ** Miscellaneous new functions
2017 *** `apply-partially' performs a "curried" application of a function.
2019 *** `buffer-swap-text' swaps text between two buffers. This can be
2020 useful for modes such as tar-mode, archive-mode, RMAIL.
2022 *** `combine-and-quote-strings' produces a single string from a list of strings
2023 sticking a separator string in between each pair, and quoting those
2024 strings that include the separator as their substring. Useful for
2025 consing shell command lines from the individual arguments.
2027 *** `custom-note-var-changed' tells Custom to treat the change in a
2028 certain variable as having been made within Custom.
2030 *** `face-all-attributes' returns an alist describing all the basic
2031 attributes of a given face.
2033 *** `format-seconds' converts a number of seconds into a readable
2034 string of days, hours, etc.
2036 *** `image-refresh' refreshes all images associated with a given image
2039 *** `locate-user-emacs-file' helps packages to select the appropriate
2040 place to save user-specific files. It defaults to `user-emacs-directory'
2041 unless the file already exists at $HOME.
2043 *** `read-color' reads a color name using the minibuffer.
2045 *** `read-shell-command' does what its name says, with completion. It
2046 uses the minibuffer-local-shell-command-map for that.
2048 *** `split-string-and-unquote' splits a string into a list of substrings
2049 on the boundaries of a given delimiter, and unquotes the substrings that
2050 are quoted. Useful for taking apart shell commands.
2052 *** The two new functions `looking-at-p' and `string-match-p' can do
2053 the same matching as `looking-at' and `string-match' without changing
2056 *** The two new functions `make-serial-process' and
2057 `serial-process-configure' provide a Lisp interface to the new serial
2058 port support (see Emacs changes, above).
2060 ** Miscellaneous new variables
2062 *** `auto-save-include-big-deletions', if non-nil, means auto-save is
2063 not turned off automatically after a big deletion.
2065 *** `read-circle', if nil, disables the reading of recursive Lisp
2066 structures using the #N= and #N# syntax.
2068 *** `this-command-keys-shift-translated' is non-nil if the key
2069 sequence invoking the current command was found by shift-translation.
2071 *** `window-point-insertion-type' determines the insertion-type of the
2072 marker used for window-point.
2074 *** bookmark provides `bookmark-make-record-function' so special major
2075 modes like Info can teach bookmark.el how to save and restore the
2078 *** `fill-forward-paragraph-function' specifies which function the
2079 filling code should use to find paragraph boundaries.
2082 * New Packages for Lisp Programming in Emacs 23.1
2084 ** The new package avl-tree.el deals with the AVL tree data structure.
2086 ** The new package check-declare.el verifies the accuracy of
2087 declare-function macros (see Lisp Changes, above).
2089 ** find-cmd.el can build `find' commands using lisp syntax.
2091 ** The package misearch.el has been added. It allows Isearch to search
2092 through multiple buffers. A variable `multi-isearch-next-buffer-function'
2093 defines the function to call to get the next buffer to search in the series
2094 of multiple buffers. Top-level commands `multi-isearch-buffers',
2095 `multi-isearch-buffers-regexp', `multi-isearch-files' and
2096 `multi-isearch-files-regexp' accept a single argument that specifies
2097 a list of buffers/files to search for a string/regexp.
2099 ** The new major mode `special-mode' is intended as a parent for
2100 major modes such as those that set the "'mode-class 'special" property.
2103 ----------------------------------------------------------------------
2104 This file is part of GNU Emacs.
2106 GNU Emacs is free software: you can redistribute it and/or modify
2107 it under the terms of the GNU General Public License as published by
2108 the Free Software Foundation, either version 3 of the License, or
2109 (at your option) any later version.
2111 GNU Emacs is distributed in the hope that it will be useful,
2112 but WITHOUT ANY WARRANTY; without even the implied warranty of
2113 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2114 GNU General Public License for more details.
2116 You should have received a copy of the GNU General Public License
2117 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2122 paragraph-separate: "[
\f]*$"
2125 arch-tag: e759449d-88b3-4de4-9900-3a6c3dfa23e2