1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to emacs-pretest-bug@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 23.
11 See files NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18, and NEWS.1-17
12 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
19 +++ indicates that the appropriate manual has already been updated.
20 --- means no change in the manuals is called for.
21 When you add a new item, please add it without either +++ or ---
22 so we will look at it and add it to the manual.
25 * Installation Changes in Emacs 23.2
27 ** New configure options for Emacs developers
28 These are not new features; only the configure flags are new.
30 *** --enable-profiling builds Emacs with profiling enabled.
31 This might not work on all platforms.
33 *** --enable-checking[=OPTIONS] builds emacs with extra runtime checks.
36 ** `make install' now consistently ignores umask, creating a
37 world-readable install.
39 * Startup Changes in Emacs 23.2
41 ** Command-line option -Q (--quick) now also disables loading X resources.
42 Note however that this does not affect Lucid or Motif widgets, if you
43 are using those toolkits. On Windows, this option causes Emacs to
44 ignore Registry settings, though environment variables set on the
45 Registry are still honored.
47 *** The new variable `inhibit-x-resources' shows whether X resources
50 * Changes in Emacs 23.2
52 ** Function arguments in *Help* buffers are now in uppercase by default.
53 You can customize the new variable `help-downcase-arguments' to change it.
55 ** Unibyte sessions are now considered obsolete.
56 I.e. the use of the environment variable EMACS_UNIBYTE, or command line
57 arguments --unibyte, --multibyte, --no-multibyte, and --no-unibyte
58 is deprecated. Similarly for custom-izing enable-multibyte-characters, or
59 setting default-enable-multibyte-characters.
61 ** The default value of `trash-directory' has changed to nil, which
62 means that `move-file-to-trash' trashes files according to
63 freedesktop.org specifications, the same method used by the Gnome,
64 KDE, and XFCE desktops. (This change has no effect on Windows, which
65 uses `system-move-file-to-trash' for trashing.)
68 ** Emacs frames can be maximized.
69 The command line arguments -mm/--maximized and the value maximized to the
70 frame parameter fullscreen makes the Emacs frame maximized.
73 ** New frame parameter sticky makes Emacs frames sticky in virtual desktops.
75 ** The pointer now becomes invisible when typing.
76 Customize make-pointer-invisible to turn it off.
78 ** Killing a buffer with a running process now asks a confirmation.
79 You can remove this query in two ways: either removing
80 `process-kill-buffer-query-function' from `kill-buffer-query-functions' or
81 setting the appropriate process flag with `set-process-query-on-exit-flag'.
83 ** The variable `load-in-progress' won't get corrupted by binding it
84 with `let'. In certain situations, loading an Emacs Lisp file from
85 source while in the midst of loading another file (e.g., with
86 `require' or `autoload') could cause the value of `load-in-progress'
87 to be corrupted once the outer load completed. Most code doesn't care
88 about this, but some (like c-mode) may check it.
90 ** File-local variable changes
92 *** Specifying a minor mode as a local variables enables that mode,
93 unconditionally. The previous behavior, toggling the mode, was
94 neither reliable nor generally desirable.
96 *** New commands for adding and removing file-local variables:
97 `add-file-local-variable', `delete-file-local-variable',
98 `add-file-local-variable-prop-line', and
99 `delete-file-local-variable-prop-line'.
101 *** New commands for adding and removing directory-local variables,
102 and copying them to and from file-local variable lists:
103 `add-dir-local-variable', `delete-dir-local-variable',
104 `copy-dir-locals-to-file-locals',
105 `copy-dir-locals-to-file-locals-prop-line' and
106 `copy-file-locals-to-dir-locals'.
108 ** New coding system `utf-8-hfs' is available in
109 international/ucs-normalize.el. It is suitable for
110 default-file-name-coding-system on Mac OS X.
113 * Editing Changes in Emacs 23.2
117 *** If `select-active-regions' is t, any active region automatically
118 becomes the primary selection (for interaction with other window
119 applications). If you enable this, you might want to bind
120 `mouse-yank-primary' to Mouse-2.
122 *** When `save-interprogram-paste-before-kill' is non-nil, emacs will
123 not clobber the the interprogram paste when something is killed in it
124 by saving the former in the `kill-ring' before the latter.
126 ** When `kill-do-not-save-duplicates' is non-nil, identical subsequent
127 kills are not duplicated in the `kill-ring'.
130 ** The default value for `blink-matching-paren-distance' has been increased.
132 ** The new completion-style `initials' is available.
133 For instance, this can complete M-x lch to list-command-history.
136 * Changes in Specialized Modes and Packages in Emacs 23.2
138 ** .calc.el and .abbrev_defs obey user-emacs-directory.
140 ** Calc graphing commands (`g f' etc.) now work on MS-Windows,
141 if you have the native Windows port of Gnuplot version 3.8 or later
144 ** Calendar and diary
146 *** Fancy diary display is now the default.
147 If you prefer the simple display, customize `diary-display-function'.
149 *** The diary's fancy display now enables view-mode.
152 *** The command `calendar-current-date' accepts an optional argument
153 giving an offset from today.
157 *** The default value for `desktop-buffers-not-to-save' is nil.
158 This means Desktop will try restoring all buffers, when you restart
159 your Emacs session. Also, `desktop-buffers-not-to-save' is only
160 effective for buffers that have no associated file. If you want to
161 exempt buffers that do correspond to files, customize the value of
162 `desktop-files-not-to-save' instead.
164 ** FIXME mail-user-agent change
165 This probably affects a lot of documentation.
171 *** The new command `Info-virtual-index' bound to "I" displays a menu of
172 matched topics found in the index.
174 *** The new command `info-finder' replaces finder.el with a virtual Info
175 manual that generates an Info file which gives the same information
176 through a menu structure.
179 ** New connection methods in Tramp.
180 The new connection methods "rsyncc", "imap" and "imaps" have been
181 introduced. On systems which support GVFS-Fuse, Tramp offers also the
182 new connection methods "dav", "davs", "obex" and "synce".
184 ** nXML mode is now the default for editing XML files.
186 ** VC and related modes
188 *** FIXME: add info about the new VC functions: vc-root-diff and
189 vc-root-print-log once they stabilize.
191 *** When a file is not found, VC will not try to check it out of RCS anymore.
195 **** The new variable vc-git-add-signoff can be used to add a
196 Signed-off-by line when committing.
198 **** Support for operating with stashes has been added to vc-dir: the stash list is
199 displayed in the *vc-dir* header, stashes can be created, removed and
200 their content displayed.
202 **** vc-dir displays the stash status
204 *** log-edit-strip-single-file-name controls whether or not single filenames
205 are stripped when copying text from the ChangeLog to the *VC-Log* buffer.
210 *** Elint now uses compilation-mode.
213 *** Elint can now scan individual files and whole directories,
214 and can be run in batch mode.
217 *** Elint does a more thorough initialization, and recognizes more built-in
218 functions and variables. Customize `elint-scan-preloaded' if you want
219 to sacrifice some accuracy for a faster startup.
222 *** Elint attempts some basic understanding of featurep and (f)boundp tests.
225 *** Customize `elint-ignored-warnings' to suppress some warnings.
229 *** The new command `async-shell-command' bound globally to `M-&' executes
230 the command asynchronously without the need to manually add ampersand to
231 the end of the command. Its output appears in the buffer `*Async Shell
235 *** Autorevert Tail mode now works now for remote files.
238 * New Modes and Packages in Emacs 23.2
242 ** js.el is a new major mode for JavaScript files.
244 ** imap-hash.el is a new library to address IMAP mailboxes as hashtables.
247 * Lisp changes in Emacs 23.2
249 ** called-interactively-p now takes one argument and replaces interactive-p
250 which is now marked obsolete.
251 ** New function set-advertised-calling-convention makes it possible
252 to obsolete arguments as well as make some arguments mandatory.
253 ** eval-next-after-load is obsolete.
254 ** New hook `after-load-functions' run after loading an Elisp file.
256 ** You can control which binding is preferentially shown in menus and
257 docstrings by adding a `:advertised-binding' property to the corresponding
258 command's symbol. That property can hold a single binding or a list
261 ** New macro with-silent-modifications to tweak text properties without
262 affecting the buffer's modification state.
263 ** All the default-FOO variables that hold the default value of the FOO
264 variable, are now declared obsolete.
266 ** read-key is a function halfway between read-event and read-key-sequence.
267 It reads a single key, but obeys input and escape sequence decoding.
269 ** start-process-shell-command and start-file-process-shell-command
270 now only take a single `command' argument.
272 ** The variable `process-file-side-effects' shall be bound to nil, if
273 a `process-file' call does not change a remote file. By this, file
274 name handlers like Tramp can apply optimizations.
276 ** Hash tables have a new printed representation that is readable.
277 The feature `hashtable-print-readable' identifies this new
280 ** Functions performing Unicode normalization are added. They are:
281 ucs-normalize-NFD-region, ucs-normalize-NFD-string,
282 ucs-normalize-NFC-region, ucs-normalize-NFC-string,
283 ucs-normalize-NFKD-region, ucs-normalize-NFKD-string,
284 ucs-normalize-NFKC-region, ucs-normalize-NFKC-string,
285 ucs-normalize-HFS-NFD-region, ucs-normalize-HFS-NFD-string,
286 ucs-normalize-HFS-NFC-region, ucs-normalize-HFS-NFC-string.
288 ** completion-annotate-function specifies how to compute annotations
289 for completions displayed in *Completions*.
292 ** Face aliases can now be marked as obsolete, using the macro
293 `define-obsolete-face-alias'.
296 ** Changing the file-names generated by byte-compilation by redefining
297 the function `byte-compile-dest-file' before loading bytecomp.el is obsolete.
298 Instead, customize byte-compile-dest-file-function.
300 ** Several obsolete functions removed.
301 The functions have been obsolete since Emacs 19, and are unlikely to
304 time-stamp-month-dd-yyyy, time-stamp-dd/mm/yyyy, time-stamp-mon-dd-yyyy
305 time-stamp-dd-mon-yy, time-stamp-yy/mm/dd, time-stamp-yyyy/mm/dd,
306 time-stamp-yyyy-mm-dd, time-stamp-yymmdd, time-stamp-hh:mm:ss,
307 time-stamp-hhmm, baud-rate
309 ** `delete-directory' has an optional parameter RECURSIVE.
311 ** New function `copy-directory', which copies a directory recursively.
314 ** New function `window-full-height-p', analogous to the full-width version.
317 * Changes in Emacs 23.2 on non-free operating systems
320 ** On MS-Windows, `display-time' now displays the system load average
321 as well as the time, as it does on GNU and Unix.
324 * Installation Changes in Emacs 23.1
326 ** The default X toolkit is now Gtk+, rather than Lucid.
327 The configure option `--with-gtk' has been removed. Gtk is now the
328 default toolkit, but you can use --with-x-toolkit=gtk if necessary.
331 Fonts are handled by new code capable of dealing with multiple font
332 backends. This uses the freetype and fontconfig libraries.
334 *** Emacs now accepts font names supplied in the fontconfig format
335 (e.g. "monospace-12:bold") and GTK format (e.g. "Monospace Bold 12").
337 *** Added support for local fonts (fonts installed on the machine
338 where Emacs is running).
340 *** Added support for the Xft library for antialiasing.
342 *** Added support for the otf library for complex text layout by
345 *** Added support for the m17n library for text shaping.
347 ** Changes to image support
349 *** configure now checks for libgif before libungif when searching for
352 *** Emacs now supports the SVG image format through librsvg2.
354 *** Emacs now supports multi-page TIFF images.
356 ** New NeXTSTEP-based port
357 This provides support for GNUstep (via the GNUstep libraries) and Mac
358 OS X (via the Cocoa libraries).
360 Specify --with-ns to configure for this. By default, a self-contained
361 app will be built (containing all lisp). To install/share lisp with
362 other emacsen (e.g. X11 build) use --disable-ns-self-contained. See
363 nextstep/README and nextstep/INSTALL in the Emacs source directory.
365 ** Mac OS X is no longer supported via Carbon.
366 Use the NeXTSTEP port, described above.
368 ** The new configuration option "--with-dbus" enables D-Bus language
371 ** Support for many obsolete platforms has been removed.
372 See the list at the end of etc/MACHINES for details.
374 *** Support for systems without alloca has been removed.
376 *** Support for Sun windows has been removed.
378 *** The `emacstool' utility has been removed.
380 ** The following platforms will be removed in a future Emacs version:
381 If you are still using Emacs on one of these platforms, please email
382 emacs-devel@gnu.org to inform the Emacs developers.
384 *** Old GNU/Linux systems based on libc version 5.
386 *** Old FreeBSD, NetBSD, and OpenBSD systems based on the COFF
389 *** Solaris versions 2.6 and below.
391 *** Solaris on IBM RS6000 machines.
393 *** UNIX System V (the original SysV, not later platforms based on it).
395 *** Unixware on non-x86 machines.
397 *** Platforms not supporting shared libraries (i.e., requiring the
398 NO_SHARED_LIBS compilation flag).
400 ** The configure options `--with-gcc', `--without-gcc' have been removed.
401 Configure will use gcc by default. Set the CC environment variable if
402 you need control over which C compiler is used.
404 ** The refcards are now shipped as PDF files.
406 ** The manuals are now licensed under the GNU Free Documentation License v1.3,
407 or any later version.
409 ** Emacs 23 comes with a new set of default icons.
410 Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png.
411 The Emacs 22 icon is available as `emacs22.png' in the same location.
413 * Changes in Emacs 23.1
415 ** Improved X Window System support
417 *** Emacs now supports using both X displays and ttys in one session.
418 With an Emacs server active (M-x server-start), `emacsclient -t'
419 creates a tty frame connected to the running emacs server. You can
420 use any number of different ttys. `emacsclient -c' creates a new X11
421 frame on the current $DISPLAY (or a tty frame if $DISPLAY is not set).
422 There may be problems if a display exits unexpectedly and Emacs is compiled
423 with Gtk+, see etc/PROBLEMS.
425 You can test for the presence of this feature in your Lisp code by
426 testing for the `multi-tty' feature.
428 *** Emacs starts in the background, as a daemon, when given the
429 --daemon command line argument. It disconnects from the terminal and
430 starts the server. Clients can connect and create graphical or
431 terminal frames using emacsclient.
433 **** emacsclient starts emacs in daemon mode and connects to it when
434 --alternate-editor="" is used (or when the evironment variable
435 ALTERNATE_EDITOR is set to "") and emacsclient cannot connect to an
438 *** The new command close-display-connection closes a connection to a
439 remote display. There are some bugs for Gtk+. See etc/PROBLEMS.
441 *** Emacs now supports the XEmbed specification.
442 You can embed Emacs in another application on X11. The new command line
443 option --parent-id is used to pass the parent window id to Emacs. See
444 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
445 for details about XEmbed.
447 *** Emacs can now set the frame opacity.
448 The opacity of a frame can be controlled by setting the `alpha' frame
449 parameter. This only takes effect on a compositing window manager for
450 the X Window System, such as Compiz, Beryl and Compiz Fusion, on Mac
451 OS X, or on Windows 2000 and later versions of Windows.
453 The alpha parameter should be an integer between 0 (transparent) and
454 100 (opaque), or a float number between 0.0 and 1.0. It can also be a
455 cons cell (ACTIVE . INACTIVE), where ACTIVE is the opacity of an
456 active frame and INACTIVE is the opacity of non-active frames.
458 The variable `frame-alpha-lower-limit' defines a lower bound for the
459 opacity; the default is 20.
461 ** Internationalization changes
463 *** The Emacs character set is now a superset of Unicode.
464 (It has about four times the code space, which should be plenty).
466 The internal encoding used for buffers and strings is now
467 Unicode-based and called `utf-8-emacs' (`emacs-internal' is an alias
468 for this). This encoding is backward-compatible with Unicode's UTF-8
469 encoding. The internal encoding previously used by Emacs,
470 `emacs-mule', is still available for reading and writing files.
472 During byte-compilation, Emacs 23 uses `utf-8-emacs' to write files.
473 As a result, byte-compiled files containing non-ASCII characters can't
474 be read by earlier versions of Emacs. Files compiled by Emacs 20, 21,
475 or 22 are loaded correctly as `emacs-mule' (whether or not they
476 contain multibyte characters). This takes somewhat more time, so it
477 may be worth recompiling existing .elc files which don't need to be
478 shared with older Emacsen.
480 *** There are new coding systems/aliases; see M-x list-coding-systems.
482 *** There is a new charset implementation with many new charsets.
483 See M-x list-character-sets. New charsets can be defined conveniently
484 as tables of unicodes.
486 *** There are new language environments for Chinese-GBK,
487 Chinese-GB18030, Khmer, Bengali, Punjabi, Gujarati, Oriya, Telugu,
488 Sinhala, and TaiViet.
490 *** The minor modes unify-8859-on-encoding-mode and
491 unify-8859-on-decoding-mode are obsolete.
493 *** `ucs-insert' is bound to `C-x 8 RET' and in addition to hex numbers
494 accepts numbers in hash notation (e.g. #o21430 for octal, or #10r8984 for
495 decimal). It also accepts Unicode character names with completion.
497 *** The `cyrillic-translit' input method supports many new characters.
498 Common typographical characters available from Unicode were added to
499 `cyrillic-translit': punctuation marks, accented characters, fractions,
502 ** Emacs now supports serial port access on GNU/Linux, Unix, and
503 Windows. The new command `serial-term' starts an interactive terminal
504 on a serial port. The serial port can be configured at runtime with
505 the mode-line mouse menu.
509 *** In the Options menu, the "Set Default Font" item applies the
510 selected font to the `default' face on all frames, not just the
511 current frame. Furthermore, if Emacs is compiled with both GTK and
512 Fontconfig support, the "Set Default Font" item uses the GTK font
513 selection dialog instead of an Emacs pop-up menu.
515 *** The font setting chosen by "Set Default Font" is saved if the
516 "Save Options" item is used.
518 *** The Tools menu contains a new Encryption/Decryption submenu.
519 This contains commands provided by EasyPG, the newly-included
520 interface to GnuPG (see New Modes and Packages).
522 *** In the Options menu, the "Truncate Long Lines in the Buffer" entry
523 has been replaced with a submenu offering three different ways to
524 handle long lines: truncation, continuation at the window edge, and
525 the new word wrapping behavior (see Editing Changes, below).
527 *** Improvements to menus for major and minor modes
528 More major and minor modes now have a mode specific menu, and existing
529 mode menus have been improved to include more functionality.
533 *** The mode-line displays a `@', instead of `-', if the
534 default-directory for the current buffer is on a remote machine.
536 *** The mode-line displays a mode menu when mouse-1 is clicked on a
537 minor mode, in the same way as it already did for major modes.
539 *** The `mode-line-emphasis' face is used to highlight certain
540 mode-line information (e.g. waiting for a VC command to finish).
542 *** The mode-line tooltips have been improved to provide more details.
544 *** The VC, line/colum number and minor mode indicators on the mode
545 line are now interactive: mouse-1 can be used on them to pop up a menu.
547 ** File deletion can make use of the Recycle Bin or system Trash folder.
548 Set `delete-by-moving-to-trash' non-nil to use this. Deleted files
549 and directories will then be sent to the Recycle Bin on Windows, and
550 to `trash-directory' on other systems.
552 ** Directory-local variables can now be defined.
553 By default, Emacs looks in .dir-locals.el for directory-local
554 variables. For more information, see `dir-locals-set-directory-class'
555 and `dir-locals-set-class-variables'.
557 ** Emacs can now use `auth-source' for authentication.
558 `smtpmail' and `url' (Tramp and Gnus also) use `auth-source' to obtain
559 login names and passwords. The match, if found, is reported
560 in *Messages* with the password blanked out.
562 ** `where-is-preferred-modifier' can specify your favorite modifier.
565 * Startup Changes in Emacs 23.1
567 ** The option `inhibit-startup-screen' (with aliases to old names
568 `inhibit-splash-screen' and `inhibit-startup-message') doesn't inhibit
569 display of the initial message in the *scratch* buffer. If you don't
570 want to display the initial message in the *scratch* buffer at startup,
571 you can set the option `initial-scratch-message' to nil.
573 ** New user option `initial-buffer-choice' specifies what to display
574 after starting Emacs: startup screen, *scratch* buffer, visiting a
577 ** New alias `argv' for `command-line-args-left'
578 This is a convenience alias, so that one can write `(pop argv)'
579 inside of --eval command line arguments in order to access
582 ** The abbrev file is no longer read at startup in batch mode.
584 ** Emacs now supports invocation by an X session manager.
585 It can save a session and restore it later. See the documentation of
586 the functions `emacs-session-save' and `emacs-session-restore'.
587 (Actually, this feature was introduced with Emacs 22, but it was not
590 * Incompatible Editing Changes in Emacs 23.1
592 ** In Dired, `dired-flag-garbage-files' is rebound from `&' to `%&'
593 on the regexp command prefix map.
595 ** In Dired-x, all command guesses for ! are now added to the default
596 list accessible by M-n instead of pushing all guesses temporarily into
599 ** In Isearch mode, a special case of typing `C-w' at the beginning of
600 the minibuffer that toggles word search (i.e. using key sequences
601 `C-s RET C-w' or `C-s M-e C-w') is obsolete. You can use the global key
602 `M-s w' to start word search, or type `M-s w' in Isearch mode to
603 toggle word search. To start nonincremental word search you can now use
604 `M-s w RET' and `M-s w C-r RET' instead of `C-s RET C-w' and `C-r RET C-w'.
606 ** In Info, `Info-search' is unbound from `M-s' to allow using `M-s w'
607 for word search as well as other search commands from the global prefix
608 key `M-s'. `Info-search' is still bound to `s', and also incremental
609 search commands `C-s', `C-M-s', `C-r', `C-M-r' are available for searching
610 through multiple Info nodes, together with their nonincremental versions
611 `C-s RET', `C-r RET', `C-M-s RET', `C-M-r RET', `M-s w RET'.
613 ** In Text mode, `center-line' and `center-paragraph' are rebound from
614 `M-s' and `M-S' to global keys `M-o M-s' and `M-o M-S' on the global
615 prefix map `M-o', which is intended for such formatting commands.
617 ** The following input methods were removed in Emacs 22.2, but this was
618 not advertised: danish-alt-postfix, esperanto-alt-postfix,
619 finnish-alt-postfix, german-alt-postfix, icelandic-alt-postfix,
620 norwegian-alt-postfix, scandinavian-alt-postfix, spanish-alt-postfix,
621 and swedish-alt-postfix. Use the versions without "alt-", which are
625 * Editing Changes in Emacs 23.1
627 ** The C-n and C-p line-motion commands now move by screen lines,
628 taking continued lines and variable-width characters into account.
629 Setting `line-move-visual' to nil reverts this to the previous
630 behavior (i.e., motion by logical lines based on buffer contents
633 ** C-x C-c now invokes `save-buffers-kill-terminal', and C-z now
634 invokes `suspend-frame'. These changes are for compatibility with the
635 new multi-tty support (see `Improved X Window System support' above).
639 *** Transient Mark mode is now on by default.
641 *** mark-even-if-inactive now defaults to t
643 *** When Transient Mark mode is on, C-SPC C-SPC pushes a mark without
646 *** When Transient Mark mode is on, M-q now fills the region if the
647 region is active. Otherwise, it fills the current paragraph.
649 *** When Transient Mark mode is on, M-$ now checks spelling of the
650 region if the region is active. Otherwise, it checks spelling of the
653 *** When Transient Mark mode is on, TAB now indents the region if the
656 *** The variable `use-empty-active-region' controls whether an empty
657 active region in Transient Mark mode should make commands operate on
660 ** Temporarily active regions
662 *** The new variable shift-select-mode, non-nil by default, controls
663 shift-selection. When Shift Select mode is on, shift-translated
664 motion keys (e.g. S-left and S-down) activate and extend a temporary
665 region, similar to mouse-selection.
667 *** Temporarily active regions, created using shift-selection or
668 mouse-selection, are not necessarily deactivated in the next command.
669 They are only deactivated after point motion commands that are not
670 shift-translated, or after commands that would ordinarily deactivate
671 the mark in Transient Mark mode (e.g., any command that modifies the
674 ** Minibuffer and completion changes
676 *** Emacs may ask for confirmation before opening a non-existent file
677 or buffer. By default, Emacs requests confirmation if you type RET
678 immediately after TAB, and the resulting input is not an existing file
679 or buffer; this usually happens when the minibuffer input did not
680 complete far enough and you entered RET by mistake. In that case,
681 Emacs puts the message "[Confirm]" in the minibuffer; type RET again
682 to create the file or buffer.
684 The new variable confirm-nonexistent-file-or-buffer determines whether
685 Emacs asks for confirmation. The default value is `after-completion'.
686 If you change it to t, Emacs always asks for confirmation; if you
687 change it to nil, Emacs never asks for confirmation.
689 *** The rules for performing completion have been changed.
690 When generating completion alternatives, Emacs now takes the
691 minibuffer text after point, if any, into account: this text is
692 treated as a substring of the remaining part of the completion
693 alternative (i.e., the part not matched by the minibuffer text before
694 point). If no completion alternatives are found this way, Emacs
695 attempts to perform partial-completion. If still no completion
696 alternatives are found, we fall back on the Emacs 22 rules for
697 performing completion.
699 The new variable `completion-styles' can be customized to choose your
700 favorite completion style.
702 *** When M-n in the minibuffer reaches the end of the list of defaults,
703 it adds the completion list to the end, so next M-n continues putting
704 completion items to the minibuffer. The same principle applies to
705 incremental search commands as well: C-s or C-M-s starts searching
706 the default values and after the end of defaults they continue
707 searching minibuffer completion items.
709 *** Minibuffer input of shell commands now comes with completion.
711 *** In the `C-x d' (Dired) prompt, typing M-n gives the visited file
712 name of the current buffer.
714 *** In the M-! (shell-command) prompt, M-n provides some default commands.
715 These are guessed using the file extension of the current file, based
716 on the file-handlers specified in the operating system's `mailcap'
717 file. The ! command in Dired (dired-do-shell-command) works
718 similarly, using the file displayed on the current line.
720 *** A list of regexp default values is available via M-n for `occur',
721 `keep-lines', `flush-lines' and `how-many'. This list includes the active
722 region in transient-mark-mode, the word under the cursor, the last Isearch
723 regexp, the last Isearch string and the last replacement regexp.
725 *** When enable-recursive-minibuffers is non-nil, operations which use
726 switch-to-buffer (such as C-x b and C-x C-f) do not fail any more when
727 used in a minibuffer or a dedicated window. Instead, they fallback on
728 using pop-to-buffer, which will use some other window. This change
729 has no effect when enable-recursive-minibuffers is nil (the default).
731 *** Isearch started in the minibuffer searches in the minibuffer history.
732 Reverse Isearch commands (C-r, C-M-r) search in previous minibuffer
733 history elements, and forward Isearch commands (C-s, C-M-s) search in
734 next history elements. When the reverse search reaches the first history
735 element, it wraps to the last history element, and the forward search
736 wraps to the first history element. When the search is terminated, the
737 history element containing the search string becomes the current.
739 *** The variable read-file-name-completion-ignore-case overrides
740 completion-ignore-case for file name completion.
742 *** The variable read-buffer-completion-ignore-case overrides
743 completion-ignore-case for buffer name completion.
745 *** The new command `minibuffer-force-complete' chooses one of the
746 possible completions, rather than stopping at the common prefix.
748 *** If `completion-auto-help' is `lazy', Emacs shows the completions
749 buffer only on the second attempt to complete. This was already
750 supported in `partial-completion-mode'.
754 *** S-down-mouse-1 now pops up a menu for changing the font and text
755 size of the default face in the current buffer. The face is changed
756 via face remapping (see Lisp changes, below).
758 *** New commands to change the default face size in the current buffer.
759 To increase it, type `C-x C-+' or `C-x C-='. To decrease it, type
760 `C-x C--'. To restore the default (global) face size, type `C-x C-0'.
761 These work via Text Scale mode, a new minor mode.
763 The final key in the above commands may be repeated without the
764 leading `C-x', e.g. `C-x C-= C-= C-=' increases the face height by
765 three steps. Each step scales the height of the default face by the
766 value of the variable `text-scale-mode-step'.
768 *** The commands buffer-face-mode and buffer-face-set can be used to
769 remap the default face in the current buffer. See "Buffer Face mode",
770 under New Modes and Packages.
772 ** Primary selection changes
774 *** You can disable kill ring commands from accessing the primary
775 selection by setting `x-select-enable-primary' to nil.
777 ** Continuation lines can now be wrapped at word boundaries
778 (word-wrapping). This is controlled by the new per-buffer variable
779 `word-wrap'. Word wrapping does not take place if continuation lines
780 are not shown, e.g. if truncate-lines is non-nil. The most convenient
781 way to enable word-wrapping is using the new minor mode Visual Line
782 mode; in addition to setting `word-wrap' to t, this rebinds some
783 editing commands to work on screen lines rather than text lines. See
784 New Modes and Packages, below.
786 ** Window management changes
788 *** truncate-partial-width-windows now accepts integer values, which
789 specify a minimum window width for partial-width windows, below which
790 lines are truncated. The default has been changed to 50.
792 *** The new command balance-windows-area balances windows both
793 vertically and horizontally.
795 *** pop-to-buffer now always sets input focus when the popped-to window
796 is on a different frame.
798 ** Miscellaneous changes:
800 *** C-l is bound to the new command recenter-top-bottom, rather than recenter.
801 This moves the current line to window center, top and bottom on
802 successive invocations.
804 *** scroll-preserve-screen-position also preserves the column position.
806 *** If `yank-pop-change-selection' is t, rotating the kill ring also
807 updates the selection or clipboard to the current yank, just as M-w
808 would do so with the text it copies to the kill ring.
810 *** C-M-% now shows replacement as it would look in the buffer, with
811 `\N' and `\&' substituted according to the match. Old behavior can be
812 restored by customizing `query-replace-show-replacement'.
814 *** The command shell prompts for the default directory, when it is
815 called with a prefix and the default directory is a remote file name.
816 This is because some file name handlers (like ange-ftp) are not able to
817 run processes remotely.
819 *** The new command kill-matching-buffers kills buffers whose name
822 *** The value of comment-style now defaults to `indent'.
823 Thefore, comment-start markers are inserted at the current indentation
824 of the region to comment, rather than the leftmost column.
826 *** The new commands `pp-macroexpand-expression' and
827 `pp-macroexpand-last-sexp' pretty-print macro expansions.
829 *** The new command `set-file-modes' allows to set file's mode bits.
830 The mode bits can be specified in symbolic notation, like with GNU
831 Coreutils, in addition to an octal number. `chmod' is a new
832 convenience alias for this function.
834 *** `next-error-recenter' specifies how next-error should recenter the
835 visited source file. Its value can be a number (for example, 0 for
836 top line, -1 for bottom line), or nil for no recentering.
838 *** When typing in a password in the echo area, C-y yanks the current
839 kill into the password.
841 *** Tooltip frame parameters `font' and `color' in `tooltip-frame-parameters'
842 are ignored. Customize the `tooltip' face instead.
844 *** `mkdir' is a new convenience alias for `make-directory'.
846 * New Modes and Packages in Emacs 23.1
848 ** Auto Composition Mode is a minor mode that composes characters
849 automatically when they are displayed. It is globally on by default.
850 It uses `auto-composition-function' (default `auto-compose-chars').
852 ** Bubbles, a new game, is similar to SameGame.
854 ** Buffer Face mode is a minor mode for remapping the default face in
855 the current buffer. The variable `buffer-face-mode-face' specifies
856 the face to remap to. The command `buffer-face-set' prompts for a
857 face name, sets `buffer-face-mode-face' to it, and enables
858 buffer-face-mode. See "Face changes", under Editing Changes, for a
859 description of face remapping.
861 ** butterfly flips the desired bit on the drive platter.
862 See http://xkcd.com/378/
864 ** bug-reference.el provides clickable links to bug reports.
866 ** dbus.el provides D-Bus language bindings.
867 D-Bus is an inter-process communication mechanism for applications
868 residing on the same host. See the manual for details.
870 ** DocView mode allows viewing of PDF, PostScript and DVI documents.
871 One can also search for a regular expression in the document. For
872 details, see the commentary in doc-view.el.
874 PDF and DVI files are now opened in Doc View mode by default.
876 In Postcript mode, C-c C-c launches Doc View minor mode for viewing
879 ** EasyPG provides an interface to the GNU Privacy Guard (GnuPG).
880 It includes a GnuPG keyring browser, cryptographic operations on
881 regions and files, and automatic encryption of *.gpg files. For
882 details, see the EasyPG Assistant User's Manual.
884 ** json.el is a library for parsing and generating JSON
885 (JavaScript Object Notation), a lightweight data-interchange format.
887 ** linum.el is a new minor mode to display line numbers for the
890 ** mairix.el is an interface to mairix, a free tool for indexing and
891 searching locally stored mail. It allows you to query mairix and
892 display the search results with Rmail, Gnus and VM. Note that there
893 is an existing Gnus back end, nnmairix.el, which should be used with
896 ** minibuffer-depth-indicate-mode shows the minibuffer depth in the prompt.
899 This is a new mode for editing XML documents. It allows a schema to
900 be associated with the XML document being edited, using Relax NG as
901 the schema language. The schema is used to provide two key features:
903 *** Continuous validation. nXML validates as you type, highlighting
904 any invalid parts of your document.
906 *** Completion. nXML can assist you in entering an element name,
907 attribute name or data value by using information about what is
908 allowed by the schema in that context.
910 ** proced.el provides a Dired-like interface for operating on
911 processes. Proced makes an Emacs buffer containing a listing of the
912 current processes. You can use the normal Emacs commands to move
913 around in this buffer, and special Proced commands to operate on the
914 processes listed. It is currently only functional on GNU/Linux,
915 MS-Windows and Solaris.
917 ** Remember Mode is a mode for jotting down things to remember.
918 Notes can be saved to a Diary file. For details, see the Remember
921 ** RST mode is a major mode for editing reStructuredText files.
923 ** Ruby mode is a major mode for Ruby files.
925 ** Visual Line mode provides support for editing by visual lines.
926 It turns on word-wrapping in the current buffer, and rebinds C-a, C-e,
927 and C-k to commands that operate by visual lines instead of logical
928 lines. This is a more reliable replacement for longlines-mode.
929 This can also be turned on using the menu bar, via
930 Options -> Line Wrapping in this Buffer -> Word Wrap
932 ** xesam.el is an implementation of Xesam, an interface to (desktop)
933 search engines like Beagle, Strigi, and Tracker. The Xesam API
934 requires D-Bus for communication.
936 ** zeroconf.el offers service discovery and service publishing
937 interfaces according to the zeroconf specification. It communicates
938 with Avahi, a zeroconf implementation, via D-Bus messages on systems
939 which have installed this software.
941 ** There is a new `whitespace' package.
942 (The pre-existing one has been renamed to `old-whitespace'.)
943 Now, besides reporting bogus blanks, the whitespace package has a
944 minor mode and a global minor mode to visualize blanks (TAB, (HARD)
945 SPACE and NEWLINE). The visualization is made via faces and/or display
946 table. It can also indicate lines that extend beyond a given column,
947 trailing blanks, and empty lines at the start or end of a buffer.
948 See `whitespace-style' for more details. The `whitespace-action' option
949 specifies what to do when a buffer is visited, killed, or written.
952 * Changes in Specialized Modes and Packages in Emacs 23.1
954 ** Abbrev has been rewritten in Elisp and extended with more flexibility.
956 *** New functions: abbrev-get, abbrev-put, abbrev-table-get, abbrev-table-put,
957 abbrev-table-p, abbrev-insert, abbrev-table-menu.
959 *** Special hook `abbrev-expand-functions' obsoletes `pre-abbrev-expand-hook'.
961 *** `make-abbrev-table', `define-abbrev', `define-abbrev-table' all take
962 extra arguments for arbitrary properties.
964 *** New variable `abbrev-minor-mode-table-alist'.
966 *** `local-abbrev-table' can hold a list of abbrev-tables.
968 *** Abbrevs have now the following special properties:
969 `:count', `:system', `:enable-function', `:case-fixed'.
971 *** Abbrev-tables have now the following special properties:
972 `:parents', `:case-fixed', `:enable-function', `:regexp',
973 `abbrev-table-modiff'.
977 *** `apropos-library' describes the elements defined in a given library.
979 *** Set `apropos-compact-layout' is you want a more compact (but wider) layout.
981 ** Archive Mode has basic support to browse Rar archives.
982 Note, however, that the free version of the unrar command only handles
983 versions 1 and 2 of the Rar format.
987 *** New command `bibtex-initialize' (re)initializes BibTeX buffers.
989 *** New `bibtex-entry-format' options `whitespace', `braces', and
990 `string', disabled by default.
992 *** New variable `bibtex-cite-matcher-alist' contains rules to
993 identify cited keys in BibTeX entries, used by `bibtex-find-crossref'.
995 *** Command `bibtex-url' allows multiple URLs per entry.
999 *** bookmark.el saves bookmarks in a pre-Emacs-23-incompatible file format
1000 bookmark.el can read a .emacs.bmk file saved by an older Emacs, but an
1001 older Emacs cannot read one saved by Emacs 23.
1003 ** Calendar and diary
1005 *** There is a new date style, `iso', essentially year/month/day.
1006 The variable `european-calendar-style' is obsolete - use `calendar-date-style'.
1007 Similarly, the commands `american-calendar' and `european-calendar'
1008 should be replaced by `calendar-set-date-style'.
1010 *** The calendar namespace has been rationalized.
1011 All functions and variables now begin with a `calendar-', `diary-', or
1012 `holiday-' prefix. The various calendar systems have secondary
1013 prefixes, eg `calendar-french-'. The old names you are likely to use
1014 directly still exist, for the time being, as aliases, but please start
1015 using the new names.
1017 *** The whitespace in the calendar layout can be customized.
1019 calendar-left-margin, calendar-intermonth-spacing, calendar-column-width,
1020 calendar-day-header-width, and calendar-day-digit-width.
1022 *** Text (e.g. ISO weeks) can be displayed between the calendar months.
1023 See the variables calendar-intermonth-header and calendar-intermonth-text.
1025 *** The function `holiday-chinese' computes holidays on the Chinese calendar.
1026 It has been used to add items to the list `holiday-oriental-holidays'.
1028 *** `diary-remind' accepts a negative number -DAYS as a shorthand for
1029 the list (1 2 ... DAYS).
1033 *** The new command C-c C-f (change-log-find-file) finds the file
1034 associated with the current log entry.
1036 *** The new command C-c C-c (change-log-goto-source) goes to the
1037 source code associated with a log entry.
1039 ** Compile and grep modes
1041 *** The mode-line entry for the *compilation* and *grep* buffer is color coded.
1042 It has different colors for to show that: (a) the command is still
1043 running, (b) successful completion, (c) error.
1045 *** compilation-auto-jump-to-first-error tells `compile' to jump to
1046 the first error encountered during compilations.
1048 *** compilation-scroll-output accepts a new value, `first-error', which
1049 says to stop auto scrolling at the first error that occurs.
1051 *** The `cc' alias for C++ files in `grep-file-aliases' has been
1052 improved. `hh' can be used to match C++ header files and `cchh' both
1053 C++ sources and headers.
1057 *** You can specify your copyright holders' names.
1058 Only copyright lines with holders matching `copyright-names-regexp' are
1059 considered for update.
1061 *** Copyrights can be at the end of the buffer.
1062 This is controlled by `copyright-at-end-flag' (used by, e.g., change-log-mode).
1066 *** defcustom accepts new keyword arguments, `:safe' and `:risky', which
1067 set a variable's `safe-local-variable' and `risky-local-variable' property.
1071 *** diff-refine-hunk highlights word-level details of changes in a diff hunk.
1072 It's used automatically as you move through hunks, see
1073 diff-auto-refine-mode. It is bound to `C-c C-b'.
1075 *** diff-add-change-log-entries-other-window iterates through the diff
1076 buffer and tries to create ChangeLog entries for each change.
1077 It is bound to `C-x 4 A'.
1079 *** Turning on `whitespace-mode' in a diff buffer will show trailing
1080 whitespace problems in the modified lines.
1084 *** In Dired, C-x C-q now runs the command wdired-change-to-wdired-mode,
1085 and C-x C-q in wdired-mode exits it with asking a question about
1088 *** `&' runs the command `dired-do-async-shell-command' that executes
1089 the command asynchronously without the need to manually add ampersand
1090 to the end of the command. Its output appears in the buffer `*Async Shell
1093 *** `M-s f C-s' and `M-s f M-C-s' run Isearch that matches only at file names.
1094 When a new user option `dired-isearch-filenames' is t, then even ordinary
1095 Isearch started with `C-s' and `C-M-s' matches only at file names in the
1096 Dired buffer. When `dired-isearch-filenames' is `dwim' then activation of
1097 file name Isearch depends on the position of point - if point is on a file
1098 name initially, then Isearch matches only file names, otherwise it matches
1099 everywhere in the Dired buffer. You can toggle file names matching on or
1100 off by typing `M-s f' in Isearch mode.
1102 *** `M-s a C-s' and `M-s a M-C-s' run multi-file Isearch on the marked files.
1103 They visit the first marked file in the sequence and display the usual Isearch
1104 prompt for a string or a regexp where all Isearch commands are available.
1106 *** `Q' in Dired provides two new keys for multi-file replacement.
1107 The upper case key `Y' replaces all remaining matches in all remaining files
1108 with no more questions. The upper case key `N' stops doing replacements
1109 in the current file and skips to the next file. These multi-file keys
1110 are available for all commands that use `tags-query-replace'
1111 including `dired-do-query-replace-regexp', `vc-dir-query-replace-regexp',
1112 `reftex-query-replace-document'.
1116 *** The line length of fixed-form Fortran is not fixed at 72 any more.
1117 Customize the variable `fortran-line-length' to change it.
1119 *** In Fortran mode, M-; is now bound to the standard comment-dwim,
1120 rather than fortran-indent-comment.
1122 *** (The increasingly misnamed) F90 mode supports Fortran 2003 syntax.
1126 *** The Gnus package has been updated
1127 There are many news features, bug fixes and improvements; see the file
1128 GNUS-NEWS or the node "No Gnus" in the Gnus manual for details.
1130 *** In Emacs 23, Gnus uses Emacs' new internal coding system `utf-8-emacs' for
1131 saving articles drafts and ~/.newsrc.eld. These file may not be read
1132 correctly in Emacs 22 and below. If you want to Gnus across different Emacs
1133 versions, you may set `mm-auto-save-coding-system' to `emacs-mule'.
1135 *** Passwords are consistently loaded through `auth-source'
1136 Gnus can use `auth-source' for POP and IMAP passwords. Also see that
1137 `smtpmail' and `url' support `auth-source' for SMTP and HTTP/HTTPS/RSS
1138 authentication respectively.
1142 *** New macro `with-help-window' should set up help windows better
1143 than `with-output-to-temp-buffer' with `print-help-return-message'.
1145 *** New option `help-window-select' permits to customize whether help
1146 window shall be automatically selected when invoking help.
1148 *** New variable `help-window-point-marker' permits one to specify a new
1149 position for point in help window (for example in `view-lossage').
1153 *** New command `isearch-forward-word' bound globally to `M-s w' starts
1154 incremental word search. New command `isearch-toggle-word' bound to the
1155 same key `M-s w' in Isearch mode toggles word searching on or off
1156 while Isearch is active.
1158 *** New command `isearch-highlight-regexp' bound to `M-s h r' in Isearch
1159 mode runs `highlight-regexp' (`hi-lock-face-buffer') with the current
1160 search string as its regexp argument. The same key `M-s h r' and
1161 other keys on the `M-s h' prefix are bound globally to the command
1162 `highlight-regexp' and other hi-lock commands.
1164 *** New command `isearch-occur' bound to `M-s o' in Isearch mode
1165 runs `occur' with the current search string. The same key `M-s o'
1166 is bound globally to the command `occur'.
1168 *** Isearch can now search through multiple ChangeLog files.
1169 When running Isearch in a ChangeLog file, if the search fails,
1170 then another C-s tries searching the previous ChangeLog,
1171 if there is one (e.g. going from ChangeLog to ChangeLog.12).
1172 This is enabled if multi-isearch-search is non-nil.
1174 *** Two new commands to start Isearch on a list of marked buffers
1175 for buff-menu.el and ibuffer.el are bound to the keys `M-s a C-s' and
1178 *** The part of an Isearch that failed to match is highlighted in
1179 `isearch-fail' face.
1181 *** `C-h C-h' in Isearch mode displays isearch-specific Help screen,
1182 `C-h b' displays all Isearch key bindings, `C-h k' displays the full
1183 documentation of the given Isearch key sequence, `C-h m' displays
1184 documentation of Isearch mode. All the rest Help commands exit Isearch mode
1185 and execute their global definitions.
1187 *** When started in the minibuffer, Isearch searches in the minibuffer
1188 history. See `Minibuffer changes', above.
1192 *** Upgraded to MH-E version 8.2. See MH-E-NEWS for details.
1195 *** The file etc/emacs.py now supports both Python 2 and 3, meaning
1196 that either version can be used as inferior Python by python.el.
1198 *** Python mode now has `pdbtrack' functionality. When using pdb to
1199 debug a Python program, pdbtrack notices the pdb prompt and displays
1200 the source file and line that the program is stopped at, much the same
1201 way as gud-mode does for debugging C programs with gdb.
1205 *** The default value of `recentf-keep' prevents from checking of
1206 remote files, if there is no established connection to the
1207 corresponding remote host.
1211 *** Rmail no longer converts the messages to Babyl format.
1212 Instead, it uses UNIX mbox format, both on disk and in Rmail buffers,
1213 and does conversion and decoding when a message is displayed.
1215 The first time you visit an Rmail file in Babyl format, Rmail
1216 automatically converts it to mbox format. This is a one-time
1217 conversion, but it can take a few minutes, depending on how fast is
1218 your machine and on the size of the file. You should find the rest of
1219 Rmail usage unaltered.
1221 However, M-x set-rmail-inbox-list now lasts only for one session
1222 because there is no way to save the list of inbox files in an
1225 Also, whereas with Babyl format M-x find-file would switch to Rmail
1226 mode, with mbox format this is no longer the case (there being no way
1227 to add an "-*- rmail-*-" cookie to an mbox file). Use C-u M-x rmail
1230 If you have written any extensions to Rmail, they are likely to need
1231 updating. Conceptually, the Rmail buffer that you see is no longer
1232 just a narrowed portion of the whole. So you cannot access the whole
1233 of a message (or message collection) by a simple save-restriction and
1234 widen. Instead, there are two buffers: the rmail-buffer, and the
1235 rmail-view-buffer. The former is the buffer that you see, the latter
1236 is invisible. Most of the time, the invisible `view' buffer contains
1237 the full contents of the Rmail file, and the Rmail buffer contains a
1238 decoded copy of the current message (with only a subset of the
1239 headers). In this state, Rmail is said to be `swapped'.
1241 You may find the following functions useful:
1243 `rmail-get-header' and `rmail-set-header' get or set the value of a
1244 message header, whether or not it is currently visible.
1246 `rmail-apply-in-message' is a general purpose function that calls a
1247 function (with arguments) which you specify on the full text of a given
1248 message. To further narrow to just the headers, search forward for "\n\n".
1250 *** The new command `rmail-mime' displays MIME messages.
1251 It is bound to `v' in Rmail buffers and summaries. It displays plain
1252 text and multipart messages in a temporary buffer, and offers buttons
1253 to save attachments.
1255 *** The command `rmail-redecode-body' no longer accepts the optional arg RAW.
1256 Since Rmail now holds messages in their original undecoded form in a
1257 separate buffer, `rmail-redecode-body' no longer encodes the original
1258 message, and therefore there should be no need to avoid encoding it.
1260 *** The o command is now `rmail-output'. It is an all-purpose command
1261 for copying messages from Rmail and appending them to files. It
1262 handles Babyl-format files as well as mbox-format files, and it
1263 handles both kinds properly when they are visited in Emacs. It always
1264 copies the full headers of the message.
1266 *** The C-o command is now `rmail-output-as-seen'. It uses
1267 the message as displayed, appending it to an mbox file.
1269 *** The modified status of the Rmail buffer is reported in the mode-line.
1270 Previously, this information was hidden.
1274 *** New option latex-indent-within-escaped-parens
1275 permits to customize indentation of LaTeX environments delimited
1280 *** If the gpm mouse server is running and t-mouse-mode is enabled,
1281 Emacs uses a Unix socket in a GNU/Linux console to talk to server,
1282 rather than faking events using the client program mev. This C level
1283 approach provides mouse highlighting and help echoing in the
1288 *** New connection methods.
1289 The new methods "plinkx", "plink2", "psftp", "sftp" and "fish" have
1290 been introduced. There are also new so-called gateway methods
1291 "tunnel" and "socks".
1294 IPv6 addresses are supported now as host names. They must be embedded
1295 in square brackets, like in "/ssh:[::1]:".
1297 *** Multihop syntax has been removed.
1298 The pseudo-method "multi" has been removed. Instead, multi hops
1299 can be specified by the new variable `tramp-default-proxies-alist'.
1301 *** More default settings.
1302 Default values can be set via the variables `tramp-default-user',
1303 `tramp-default-user-alist' and `tramp-default-host'.
1305 *** Connection information is cached.
1306 In order to reduce connection setup, information about used
1307 connections is kept persistently in a file. The name of this file is
1308 defined in the variable `tramp-persistency-file-name'.
1310 *** Control of remote processes.
1311 Running processes on a remote host can be controlled by settings in
1312 `tramp-remote-path' and `tramp-remote-process-environment'.
1314 *** Success of remote copy is checked.
1315 When the variable `file-precious-flag' is set, the success of a remote
1316 file copy is checked via the file's checksum.
1318 *** Passwords can be read from an authentification file.
1319 Tramp uses the package `auth-source' to read passwords from a file, if
1322 ** VC and related modes
1324 *** VC now supports applying VC operations to a set of files at a time.
1325 This enables VC to work much more effectively with changeset-oriented
1326 version-control systems such as Subversion, GNU Arch, Mercurial, Git
1327 and Bzr. VC will now pass a multiple-file commit to these systems as
1330 *** vc-dir is a new command that displays file names and their VC
1331 status. It allows to apply various VC operations to a file, a
1332 directory or a set of files/directories.
1334 *** VC switches are no longer appended, rather the first non-nil value is used.
1335 (This was for the most part true in Emacs 22, but was not advertised).
1336 This is because there is an increasing variety of VC systems, and they
1337 do not all accept the same "common" options. For example, a CVS diff
1338 command used to append the values of `vc-cvs-diff-switches',
1339 `vc-diff-switches', and `diff-switches'. Now the first non-nil value
1340 from that sequence is used. The special value `t' means "no switches".
1342 *** Clicking on the VC mode-line entry now pops the VC menu.
1344 *** The VC mode-line entry now has a tooltip that explains the VC file status.
1346 *** In VC Annotate mode, the key bindings have changed to use lower
1347 case keys instead of the upper case keys used in the past.
1349 *** In VC Annotate mode, for VC systems that support changesets, you can
1350 see the diff for the whole changeset (not only for the current file)
1351 by typing the D key. Using the "Show changeset diff of revision at
1352 line" menu entry does the same thing.
1354 *** In VC Annotate mode, you can type v to toggle the annotation visibility.
1356 *** In VC Annotate mode, you can type f to show the file revision on
1359 *** Asynchronous VC commands display [Waiting...] in the mode-line
1360 of the corresponding buffer as long as the asynchronous process is
1363 *** Log entries can be modified using the key "e" in log-view.
1364 For now only CVS, RCS, SCCS and SVN support this functionality.
1365 This is done by the `modify-change-comment' backend function.
1367 *** In log-view-mode, for VC systems that support changesets, you can
1368 see the diff for the whole changeset (not only for the current file)
1369 by typing the D key or using the "Changeset Diff" menu entry.
1371 *** In Log Edit mode, C-c C-d now shows the diff for the files involved.
1373 *** vc-git supports the "git grep" command.
1375 *** VC Support for Meta-CVS has been removed for lack of a maintainer able
1376 to update it to the new VC.
1380 *** comint-mode uses `start-file-process' now (see Lisp Changes).
1381 If `default-directory' is a remote file name, subprocesses are started
1382 on the corresponding remote system.
1384 *** Eldoc highlights the function argument under point
1385 with the face `eldoc-highlight-function-argument'.
1387 *** In Etags, the --members option is now the default.
1388 Use --no-members if you want the old default behavior of not tagging
1389 struct members in C, members variables in C++ and variables in PHP.
1391 *** The `gdb' command only works with the graphical interface now.
1392 Use `gud-gdb' if you want the (old) text command mode.
1394 *** goto-address.el provides two new minor modes, goto-address-mode and
1395 goto-address-prog-mode, which buttonize URLS and email addresses.
1397 *** The new command `eshell/info' runs info in an eshell buffer.
1399 *** The new variable `ffap-rfc-directories' specifies a list of local
1400 directories in which `ffap-rfc' will first search for RFCs.
1402 *** hide-ifdef-mode allows shadowing ifdef-blocks instead of hiding them.
1403 See option `hide-ifdef-shadow' and function `hide-ifdef-toggle-shadowing'.
1405 *** `icomplete-prospects-height' now supercedes `icomplete-prospects-length'.
1407 *** Info displays breadcrumbs in the header of the page.
1408 See Info-breadcrumbs-depth to control it.
1410 *** net-utils has an `iwconfig' command, similar to the existing `ifconfig'.
1411 It is used to configure wireless interfaces.
1413 *** The pcmpl-unix package supports hostname completion for ssh and scp.
1415 *** sgml-electric-tag-pair-mode lets you simultaneously edit matched tag pairs.
1417 *** smerge-refine highlights word-level details of changes in conflict.
1418 It's used automatically as you move through conflicts, see
1419 smerge-auto-refine-mode.
1421 *** talk.el has been extended for multiple tty support.
1423 *** A new command `display-time-world' has been added to the Time
1424 package. It creates a buffer with an updating time display using
1427 *** The appearance of superscript and subscript in TeX is more customizable.
1428 See the documentation of the variables: tex-fontify-script,
1429 tex-font-script-display, tex-suscript-height-ratio, and
1430 tex-suscript-height-minimum.
1432 *** view-remove-frame-by-deleting is now by default t
1433 since users found iconification of view-mode frames distracting.
1435 *** WoMan tries to add locale-specific manual page directories to the
1436 search path. This can be disabled by setting `woman-locale' to nil.
1439 * Changes in Emacs 23.1 on non-free operating systems
1441 ** Case is now considered significant in completion on MS-Windows.
1442 The default value of `completion-ignore-case' is now nil on
1443 MS-Windows, the same as it is for other operating systems. The
1444 variable doesn't apply to reading a file name -- in that case Emacs
1445 heeds `read-file-name-completion-ignore-case' instead.
1447 ** IPv6 is supported on MS-Windows.
1448 Emacs now supports IPv6 on Windows XP and later, and earlier versions
1449 of Windows with third party IPv6 stacks installed. In Emacs 22, IPv6 was
1450 supported on other platforms, but not on Windows due to using the winsock
1451 1.1 header file, even though Emacs was linking to the winsock 2 library.
1453 ** Busy cursor (hourglass) now displays on MS-Windows.
1454 When Emacs is busy, an hourglass mouse cursor is displayed on Windows.
1455 In Emacs 22 only X supported the busy cursor.
1457 ** Battery status is available on MS-Windows
1458 Emacs can now display the battery status in the mode-line when enabled with
1459 display-battery-mode or from the Options menu. More verbose battery
1460 information is also available with the command `battery'. In Emacs 22
1461 battery status was supported only on GNU/Linux and Mac.
1463 ** More keys available on MS-Windows.
1464 Keys normally associated with IMEs, and some exotic keys not normally found
1465 on standard keyboards have been given names so they can be bound to functions
1466 inside Emacs. If there are keys on your keyboard that have not been exposed
1467 to Emacs in the past, try C-h k to see if they are available now.
1469 Emacs can now bind functions to the extra buttons for media player and
1470 browser control present on some keyboards. These buttons are disabled
1471 by default, since enabling them prevents their system-wide use when
1472 Emacs has focus. To enable them, set the variable
1473 w32-pass-multimedia-buttons to nil. See the doc string of that variable
1474 for the list of extra keys that are available.
1476 ** BDF fonts no longer supported on MS-Windows.
1477 The font backend was completely rewritten for this release. The focus
1478 on Windows has been getting acceptable performance and full unicode
1479 support, including complex script shaping for native Windows fonts. A
1480 rewrite of the BDF font support has not happened due to lack of time
1481 and developers. If demand still exists for such a backend even with
1482 the improved language support for native Windows fonts, future
1483 development in this direction will most likely be based on the
1484 freetype library, giving access to a wider range of font formats.
1487 * Incompatible Lisp Changes in Emacs 23.1
1489 ** Variables cannot be both buffer-local and frame-local any more.
1491 ** `functionp' returns nil for special forms.
1492 I.e., it only returns t for objects that can be passed to `funcall'.
1494 ** The behavior of map-char-table has changed. It may call the
1495 specified function with a cons (FROM . TO) as a key if characters in
1496 that range have the same value.
1500 *** The function `dired-call-process' has been removed.
1502 *** The multibyteness of process filters is now determined by the
1503 coding-system used for decoding. The functions
1504 `process-filter-multibyte-p' and `set-process-filter-multibyte' are
1507 ** The variable `byte-compile-warnings' can now be a list starting with `not',
1508 meaning to disable the specified warnings. The meaning of this list
1509 may therefore be the reverse of what you expect (of course, this is
1510 only an issue if you make use of the new `not' syntax). Rather than
1511 checking/manipulating elements directly, use the new functions
1512 `byte-compile-warning-enabled-p', `byte-compile-disable-warning', and
1513 `byte-compile-enable-warning.'
1515 ** `mode-name' is no longer guaranteed to be a string.
1516 Use `(format-mode-line mode-name)' to ensure a string value.
1518 ** The function x-font-family-list has been removed.
1519 Use the new function font-family-list (see Lisp Changes, below).
1521 ** Internationalization changes
1523 *** The value of the function `charset-id' is now always 0.
1525 *** The functions `register-char-codings' and `coding-system-spec'
1528 *** The cpXXX coding systems are now supported automatically.
1529 The functions cp-...-codepage, which you had to use in Emacs 22 to
1530 enable support for these coding systems, have been deleted.
1532 *** The following features have been removed. They were used for
1533 displaying various scripts with specific fonts, and are no longer
1534 needed now that OpenType font support is available:
1536 **** `devanagari' and `devan-util', and all associated devanagari-* and
1537 dev-* functions and variables (formerly used for Devanagari script).
1539 **** `kannada' and `knd-util', and all associated kannada-* and knd-*
1540 functions and variables (formerly used for Kannada script).
1542 **** `malayalam' and `mlm-util', and all associated malayalam-* and
1543 mlm-* functions and variables (formerly used for Malayalam script).
1545 **** `tamil' and `tml-util, and all associated tamil-* and tml-*
1546 functions and variables (formerly used for Tamil script).
1548 *** The meaning of NAME argument of `set-fontset-font' is changed.
1549 Previously nil is accepted as the default fontset. Now, nil is for
1550 the fontset of the selected frame and t is for the default fontset.
1552 *** The meaning of FONTSET argument of `print-fontset' is changed.
1553 Now, nil is for the fontset of the selected frame and t is for the
1556 ** If a function in write-region-annotate-functions returns with a
1557 different buffer current, Emacs no longer kills that buffer
1558 automatically. This behavior existed in previous versions of Emacs,
1559 but was undocumented. To kill a buffer after write-region, give the
1560 variable `write-region-post-annotation-function' a buffer-local value
1563 ** The variable temp-file-name-pattern has been removed.
1564 This variable was only used by call-process-region, which now uses
1565 temporary-file-directory instead.
1567 ** The COUNT and SYSTEM-FLAG arguments to define-abbrev have been
1568 removed. The function now takes extra arguments for specifying
1569 arbitrary abbrev properties.
1571 ** end-of-defun-function is now guaranteed to work only when called
1572 from the start of a defun. It must now leave point exactly at the end
1573 of defun, since `end-of-defun' now itself moves forward over
1574 whitespace after calling it.
1577 * Lisp Changes in Emacs 23.1
1579 ** The new variable `generate-autoload-cookie' controls the magic comment
1580 string used by `update-file-autoloads' to find autoloaded forms. The
1581 variable `generated-autoload-file' similarly controls the name of the
1582 file where `update-file-autoloads' writes the calls to `autoload'.
1583 The default values are ";;;###autoload" and `loaddefs.el',
1586 ** New primitives `list-system-processes' and `process-attributes'
1587 let Lisp programs access the processes that are running on the local
1588 machine. See the doc strings of these functions for more details.
1589 Not all platforms support accessing this information; on those that
1590 don't, these primitives will return nil.
1592 ** New variable `user-emacs-directory'.
1593 Use this instead of "~/.emacs.d".
1595 ** If a local hook function has a non-nil `permanent-local-hook'
1596 property, `kill-all-local-variables' does not remove it from the local
1597 value of the hook variable; it remains even if you change major modes.
1599 ** `frame-inherited-parameters' lets new frames inherit parameters from
1602 ** New keymap `input-decode-map' overrides like key-translation-map, but
1603 applies before function-key-map. Also it is terminal-local contrary to
1604 key-translation-map. Terminal-specific key-sequences are generally added to
1605 this map rather than to function-key-map now.
1607 ** `ignore-errors' is now a standard macro (does not require the CL package).
1609 ** `interprogram-paste-function' can now return one string or a list
1610 of strings. In the latter case, Emacs puts the second and following
1611 strings on the kill ring.
1613 ** In `condition-case', a handler can specify "let the debugger run first".
1614 You do this by writing `debug' in the list of conditions to be handled,
1619 ((debug error) nil))
1621 ** clone-indirect-buffer now runs the clone-indirect-buffer-hook.
1623 ** `beginning-of-defun-function' now takes one argument, the count given to
1624 `beginning-of-defun'. (N.B. `end-of-defun-function' doesn't take any
1627 ** `file-remote-p' has new optional parameters IDENTIFICATION and CONNECTED.
1628 IDENTIFICATION specifies which part of the remote identifier has to be
1629 returned. With CONNECTED passed non-nil, it is checked whether a
1630 remote connection has been established already.
1632 ** The new macro `declare-function' suppresses compiler warnings about
1633 undefined functions.
1635 ** Changes to interactive function handling
1637 *** The new interactive spec code ^ says to first call
1638 handle-shift-selection if shift-select-mode is non-nil, before reading
1639 the command arguments. This is used for shift-selection (see above).
1641 *** Built-in functions can now have an interactive specification that
1642 is not a prompt string. If the `intspec' parameter of a `DEFUN'
1643 starts with a `(', the string is evaluated as a Lisp form.
1645 *** The interactive-form of a function can be added post-facto via the
1646 `interactive-form' symbol property. Mostly useful to add complex
1647 interactive forms to subroutines.
1651 *** Commands should use `use-region-p' to test whether there is
1652 an active region that they should operate on.
1654 *** `region-active-p' returns non-nil when Transient Mark mode is
1655 enabled and the mark is active. Most commands that act specially on
1656 the active region in Transient Mark mode should use `use-region-p'
1657 instead of `region-active-p', because `use-region-p' obeys the new
1658 user option `use-empty-active-region' (see Editing Changes, above).
1660 *** If a command sets `transient-mark-mode' to (only . OLDVAL), that
1661 means to activate transient-mark-mode temporarily, until the next
1662 unshifted point motion command or mark deactivation. Afterwards,
1663 reset transient-mark-mode to the value OLDVAL. The values `only' and
1664 `identity', introduced in Emacs 22, are now deprecated.
1666 ** Emacs session information
1668 *** The new variables `before-init-time' and `after-init-time' record the
1669 value of `current-time' before and after Emacs loads the init files.
1671 *** The new function `emacs-uptime' returns the uptime of an Emacs instance.
1673 *** The new function `emacs-init-time' returns the duration of the
1674 Emacs initialization.
1676 ** Changes affecting display-buffer
1678 *** display-buffer tries to be smarter when splitting windows.
1679 The new option split-window-preferred-function lets you specify your own
1680 function to pop up new windows. Its default value split-window-sensibly
1681 can split a window either vertically or horizontally, whichever seems
1682 more suitable in the current configuration. You can tune the behavior
1683 of split-window-sensibly by customizing split-height-threshold and the
1684 new option split-width-threshold. Both options now take the value nil
1685 to inhibit splitting in one direction. Setting split-width-threshold to
1686 nil inhibits horizontal splitting and gets you the behavior of Emacs 22
1687 in this respect. In any case, display-buffer may now split the largest
1688 window vertically even when it is not as wide as the containing frame.
1690 *** If pop-up-frames has the value `graphic-only', display-buffer only
1691 makes a separate frame on graphic displays.
1693 *** select-frame and set-frame-selected-window have a new optional
1694 argument NORECORD. If non-nil, this will avoid messing with the order
1695 of recently selected windows and the buffer list.
1697 ** Window parameters can now be defined.
1698 These are analogous to frame parameters, but are associated with
1701 *** The new functions window-parameters, window-parameter, and
1702 set-window-parameter are used to query and set window parameters.
1704 ** Minibuffer and completion changes
1706 *** A list of default values can be specified for the DEFAULT argument of
1707 functions `read-from-minibuffer', `read-string', `read-command',
1708 `read-variable', `read-buffer', `completing-read'. Elements of this list
1709 are available for inserting into the minibuffer by typing `M-n'.
1710 For empty input these functions return the first element of this list.
1712 *** New function `read-regexp' uses the regexp history and some useful
1713 regexp defaults (string at point, last Isearch/replacement regexp/string)
1714 via M-n when reading a regexp in the minibuffer.
1716 *** minibuffer-local-must-match-filename-map is now named
1717 minibuffer-local-filename-must-match-map.
1719 *** The `require-match' argument to `completing-read' accepts the new
1720 values `confirm-only' and `confirm-after-completion'.
1722 ** Search and replacement changes
1724 *** The regexp form \(?<num>:<regexp>\) specifies the group number explicitly.
1726 *** New function `match-substitute-replacement' returns the result of
1727 `replace-match' without actually using it in the buffer.
1729 *** The new variable `replace-search-function' determines the function
1730 to use for searching in query-replace and replace-string. The
1731 function it specifies is called by `perform-replace' when its 4th
1734 *** The new variable `replace-re-search-function' determines the
1735 function to use for searching in `query-replace-regexp',
1736 `replace-regexp', `query-replace-regexp-eval', and
1737 `map-query-replace-regexp'. The function it specifies is called by
1738 `perform-replace' when its 4th argument is non-nil.
1740 *** New keymap `search-map' bound to `M-s' provides global bindings
1741 for search related commands.
1743 *** New keymap `multi-query-replace-map' contains additonal keys bound
1744 to `automatic-all' and `exit-current' for multi-buffer interactive replacement.
1746 *** The variable `inhibit-changing-match-data', if non-nil, prevents
1747 the search and match primitives from changing the match data.
1749 *** New functions `word-search-forward-lax' and `word-search-backward-lax'.
1750 These are like `word-search-forward and `word-search-backward', except
1751 that the end of the search string need not match a word boundary,
1752 unless it ends in whitespace.
1754 ** File handling changes
1756 *** set-file-modes is now interactive and can take the mode value in
1757 symbolic notation thanks to auxiliary functions.
1759 *** file-local-variables-alist stores an alist of file-local
1760 variables defined in the current buffer.
1764 *** Each face can be remapped to a different face definition using the
1765 variable `face-remapping-alist'. This is an alist that maps faces to
1766 replacement definitions (which can be face names, lists of face names,
1767 or attribute/value plists. If this variable is buffer-local, the
1768 remapping occurs only in that buffer.
1770 *** text-scale-mode remaps the default face to a larger or smaller
1771 size in the current buffer. This feature is used by the Buffer Face
1772 menu and the new `C-x C-+', `C-x C--', and `C-x C-0' commands (see
1773 Editing Changes, above).
1777 **** `face-remap-add-relative' adds a face remapping entry to the
1780 **** ``face-remap-remove-relative' removes a face remapping entry from
1783 **** `face-remap-reset-base' restores a face to its global definition.
1785 **** `face-remap-set-base' sets the base remapping of a face.
1789 *** The new function `start-file-process' is similar to `start-process',
1790 but obeys file handlers. The file handler is chosen based on
1791 `default-directory'. The functions `start-file-process-shell-command'
1792 and `process-file-shell-command' are also new; they call internally
1793 `start-file-process' and `process-file', respectively.
1795 *** The new function `process-lines' executes an external program and
1796 returns its output as a list of lines.
1798 ** Character code, representation, and charset changes.
1800 *** In multibyte buffers and strings, characters are represented by
1801 UTF-8 byte sequences. The character code space is now 0x0..0x3FFFFF
1802 with no gap; code points 0x0..0x10FFFF are Unicode characters of the
1803 same code points, while code points 0x3FFF80..0x3FFFFF are raw 8-bit
1806 *** Generic characters no longer exist.
1808 *** The concept of a charset has changed. A single character may
1809 belong to multiple charsets (e.g. a-grave, U+00E0, belongs to charsets
1810 unicode, iso-8859-1, iso-8859-3, etc).
1812 **** The dimension of a charset is now 1, 2, 3, or 4, and the size of
1813 each dimension is no longer limited to 94 or 96.
1815 **** A dynamic charset priority list is used to infer the charset of
1816 characters for display.
1818 *** The functions `split-char' and `make-char' now accept up to 4
1819 positional codes instead of just 2.
1821 *** The functions `encode-char' and `decode-char' now accept any character sets.
1823 *** The function `define-charset' now accepts a completely different
1824 form of arguments (old-style arguments still work).
1826 *** The value of the function `char-charset' depends on the current
1827 priorities of charsets.
1829 *** The function get-char-code-property now accepts many Unicode base
1830 character properties. They are `name', `general-category',
1831 `canonical-combining-class', `bidi-class', `decomposition',
1832 `decimal-digit-value', `digit-value', `numeric-value', `mirrored',
1833 `old-name', `iso-10646-comment', `uppercase', `lowercase', and
1836 *** The functions `modify-syntax-entry' and `modify-category-entry' now
1837 accept a cons of characters as the first argument, and modify all
1838 entries in that range of characters.
1840 *** Use of `translation-table-for-input' for character code unification
1841 is now obsolete, since Emacs 23.1 and later uses Unicode as basis for
1842 internal representation of characters.
1846 **** `characterp' returns t if and only if the argument is a character.
1847 This replaces `char-valid-p', which is now obsolete.
1849 **** `max-char' returns the maximum character code (currently #x3FFFFF).
1851 **** `define-charset-alias' defines an alias of a charset.
1853 **** `set-charset-priority' sets priorities of charsets.
1855 **** `charset-priority-list' returns a prioritized list of charsets.
1857 **** `unibyte-string' makes a unibyte string from bytes.
1859 **** `define-char-code-property' defines a character code property.
1861 **** `char-code-property-description' returns the description string of
1862 a character code property.
1866 **** `find-word-boundary-function-table' is a char-table of functions to
1867 search for a word boundary.
1869 **** `char-script-table' is a char-table of script names.
1871 **** `char-width-table' is a char-table of character widths.
1873 **** `print-charset-text-property' controls how to handle `charset' text
1874 property on printing a string.
1876 **** `printable-chars' is a char-table of printable characters.
1878 ** Code conversion changes
1880 *** The new function `define-coding-system' should be used to define a
1881 coding system instead of `make-coding-system' (which is now obsolete).
1883 *** The functions `encode-coding-region' and `decode-coding-region'
1884 have an optional 4th argument to specify where the result of
1885 conversion should go.
1887 *** The functions `encode-coding-string' and `decode-coding-string'
1888 have an optional 4th argument specifying a buffer to store the result
1891 *** The new variable `inhibit-null-byte-detection' controls whether to
1892 consider text with null bytes as binary data. By default, it is
1893 `nil', and Emacs uses `no-conversion' for any text containing null
1896 *** The functions `set-coding-priority' and `make-coding-system' are obsolete.
1900 **** `with-coding-priority' executes Lisp code using the specified
1901 coding system priority order.
1903 **** `check-coding-systems-region' checks if the text in the region is
1904 encodable by the specified coding systems.
1906 **** `coding-system-aliases' returns a list of aliases of a coding system.
1908 **** `coding-system-charset-list' returns a list of charsets supported
1911 **** `coding-system-priority-list' returns a list of coding systems
1912 ordered by their priorities.
1914 **** `set-coding-system-priority' sets priorities of coding systems.
1916 **** `coding-system-from-name' returns a coding system matching with
1920 ** There is a new input method, Robin, different from Quail.
1921 It has three functionalities:
1922 i) a simple input method (converts an ASCII sequence into a string).
1923 ii) converts an existing buffer substring into another string
1924 iii) reverse conversion (each character produced by a
1925 robin rule can hold the original ASCII sequence as a char-code-property)
1927 *** The new function `robin-define-package' defines a Robin package.
1929 *** The new function `robin-modify-package' modifies an existing Robin package.
1931 *** The new function `robin-use-package' starts using a Robin package
1934 *** The new function `string-to-unibyte' is like `string-as-unibyte'
1935 but signals an error if STRING contains a non-ASCII, non-eight-bit
1938 ** Changes related to the new font backend
1940 *** Which font backends to use can be specified by the X resource
1941 "FontBackend". For instance, to use both X core fonts and Xft fonts:
1943 Emacs.FontBackend: x,xft
1945 If this resource is not set, Emacs tries to use all font backends
1946 available on your graphic device.
1948 *** New frame parameter `font-backend' specifies a list of
1949 font-backends supported by the frame's graphic device. On X, they are
1950 currently `x' and `xft'.
1952 *** The function `set-fontset-font' now accepts a script name as the
1953 second argument, and has an optional 5th argument to control how to
1958 **** `fontp' checks if the argument is a font-spec or font-entity.
1960 **** `font-spec' creates a new font-spec object.
1962 **** `font-get' returns a font property value.
1964 **** `font-put' sets a font property value.
1966 **** `font-face-attributes' returns a plist of face attributes set by a font.
1968 **** `list-fonts' returns a list of font-entities matching a font spec.
1970 **** `find-font' returns the font-entity best matching the given font spec.
1972 **** `font-family-list' returns a list of family names of available fonts.
1974 **** `font-xlfd-name' returns an XLFD name of a given font spec, font
1975 entity, or font object.
1977 **** `clear-font-cache' clears all font caches.
1979 ** Changes related to multiple-terminal (multi-tty) support
1981 *** $TERM is now set to `dumb' for subprocesses. If you want to know the
1982 $TERM inherited by Emacs you will have to look inside initial-environment.
1984 *** $DISPLAY is now dynamically inherited from the frame's `display'.
1986 *** The `window-system' variable is now frame-local. The new
1987 `initial-window-system' variable contains the `window-system' value
1988 for the first frame. `window-system' is also now a function that
1989 takes a frame argument.
1991 *** The `keyboard-translate-table' variable and the terminal and
1992 keyboard coding systems are now terminal-local.
1994 *** You can specify a terminal device (`tty' parameter) and a terminal
1995 type (`tty-type' parameter) to `make-terminal-frame'.
1997 *** The function `make-frame-on-display' now works during a tty
2000 *** A new `terminal' data type.
2001 The functions `get-device-terminal', `terminal-parameters',
2002 `terminal-parameter', `set-terminal-parameter' use this data type.
2004 *** Function key sequences are now mapped using `local-function-key-map',
2005 a new variable. This inherits from the global variable function-key-map,
2006 which is not used directly any more.
2010 **** before-hack-local-variables-hook is called after setting new
2011 variable file-local-variables-alist, and before actually applying the
2012 file-local variables.
2014 **** `suspend-tty-functions' and `resume-tty-functions' are called
2015 after a tty frame has been suspended or resumed, respectively. The
2016 functions are called with the terminal id of the frame being
2017 suspended/resumed as a parameter.
2019 **** The special hook `delete-terminal-functions' is called before
2020 deleting a terminal.
2024 **** `delete-terminal'
2030 *** `initial-environment' holds the environment inherited from Emacs's parent.
2032 ** Redisplay changes
2034 *** For underlined characters, the distance between the underline and
2035 the baseline is controlled by a new variable, `underline-minimum-offset'.
2037 *** You can now pass the value of the `invisible' property to
2038 invisible-p to check whether it would cause the text to be invisible.
2039 This is convenient when checking invisibility of text with no buffer
2040 position (e.g. in before/after-strings).
2042 *** `clear-image-cache' can be told to flush only images of a specific file.
2044 *** `vertical-motion' can now be given a goal column.
2045 It now accepts a cons cell (COLS . LINES) in its first argument, which
2046 says to stop, where possible, at a pixel x-position equal to COLS
2047 times the default column width.
2049 *** redisplay-end-trigger-functions, set-window-redisplay-end-trigger,
2050 and window-redisplay-end-trigger are obsolete. Use `jit-lock-register'
2053 *** The new variables `wrap-prefix' and `line-prefix' specify display
2054 specs which are appended at display-time to every continuation line
2055 and non-continuation line, respectively. In addition, Emacs
2056 recognizes the `wrap-prefix' and `line-prefix' text or overlay
2057 properties; these have the same effects as the variables of the same
2058 name, but take precedence.
2060 ** The Lisp interpreter now treats non-breaking space as whitespace.
2062 ** Miscellaneous new functions
2064 *** `apply-partially' performs a "curried" application of a function.
2066 *** `buffer-swap-text' swaps text between two buffers. This can be
2067 useful for modes such as tar-mode, archive-mode, RMAIL.
2069 *** `combine-and-quote-strings' produces a single string from a list of strings
2070 sticking a separator string in between each pair, and quoting those
2071 strings that include the separator as their substring. Useful for
2072 consing shell command lines from the individual arguments.
2074 *** `custom-note-var-changed' tells Custom to treat the change in a
2075 certain variable as having been made within Custom.
2077 *** `face-all-attributes' returns an alist describing all the basic
2078 attributes of a given face.
2080 *** `format-seconds' converts a number of seconds into a readable
2081 string of days, hours, etc.
2083 *** `image-refresh' refreshes all images associated with a given image
2086 *** `locate-user-emacs-file' helps packages to select the appropriate
2087 place to save user-specific files. It defaults to `user-emacs-directory'
2088 unless the file already exists at $HOME.
2090 *** `read-color' reads a color name using the minibuffer.
2092 *** `read-shell-command' does what its name says, with completion. It
2093 uses the minibuffer-local-shell-command-map for that.
2095 *** `split-string-and-unquote' splits a string into a list of substrings
2096 on the boundaries of a given delimiter, and unquotes the substrings that
2097 are quoted. Useful for taking apart shell commands.
2099 *** The two new functions `looking-at-p' and `string-match-p' can do
2100 the same matching as `looking-at' and `string-match' without changing
2103 *** The two new functions `make-serial-process' and
2104 `serial-process-configure' provide a Lisp interface to the new serial
2105 port support (see Emacs changes, above).
2107 ** Miscellaneous new variables
2109 *** `auto-save-include-big-deletions', if non-nil, means auto-save is
2110 not turned off automatically after a big deletion.
2112 *** `read-circle', if nil, disables the reading of recursive Lisp
2113 structures using the #N= and #N# syntax.
2115 *** `this-command-keys-shift-translated' is non-nil if the key
2116 sequence invoking the current command was found by shift-translation.
2118 *** `window-point-insertion-type' determines the insertion-type of the
2119 marker used for window-point.
2121 *** bookmark provides `bookmark-make-record-function' so special major
2122 modes like Info can teach bookmark.el how to save and restore the
2125 *** `fill-forward-paragraph-function' specifies which function the
2126 filling code should use to find paragraph boundaries.
2129 * New Packages for Lisp Programming in Emacs 23.1
2131 ** The new package avl-tree.el deals with the AVL tree data structure.
2133 ** The new package check-declare.el verifies the accuracy of
2134 declare-function macros (see Lisp Changes, above).
2136 ** find-cmd.el can build `find' commands using lisp syntax.
2138 ** The package misearch.el has been added. It allows Isearch to search
2139 through multiple buffers. A variable `multi-isearch-next-buffer-function'
2140 defines the function to call to get the next buffer to search in the series
2141 of multiple buffers. Top-level commands `multi-isearch-buffers',
2142 `multi-isearch-buffers-regexp', `multi-isearch-files' and
2143 `multi-isearch-files-regexp' accept a single argument that specifies
2144 a list of buffers/files to search for a string/regexp.
2146 ** The new major mode `special-mode' is intended as a parent for
2147 major modes such as those that set the "'mode-class 'special" property.
2150 ----------------------------------------------------------------------
2151 This file is part of GNU Emacs.
2153 GNU Emacs is free software: you can redistribute it and/or modify
2154 it under the terms of the GNU General Public License as published by
2155 the Free Software Foundation, either version 3 of the License, or
2156 (at your option) any later version.
2158 GNU Emacs is distributed in the hope that it will be useful,
2159 but WITHOUT ANY WARRANTY; without even the implied warranty of
2160 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2161 GNU General Public License for more details.
2163 You should have received a copy of the GNU General Public License
2164 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2169 paragraph-separate: "[
\f]*$"
2172 arch-tag: e759449d-88b3-4de4-9900-3a6c3dfa23e2