NEWS 82 KB
Newer Older
1
GNU Emacs NEWS -- history of user-visible changes.
2

Glenn Morris's avatar
Glenn Morris committed
3
Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
4
See the end of the file for license conditions.
Dave Love's avatar
#  
Dave Love committed
5

6
Please send Emacs bug reports to emacs-pretest-bug@gnu.org.
7 8
If possible, use M-x report-emacs-bug.

9
This file is about changes in Emacs version 23.
10

11 12
See files NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18, and NEWS.1-17
for changes in older Emacs versions.
13 14 15

You can narrow news to a specific version by calling `view-emacs-news'
with a prefix argument or by typing C-u C-h C-n.
16

17 18 19 20 21 22 23 24

Temporary note:
 +++ indicates that the appropriate manual has already been updated.
 --- means no change in the manuals is called for.
When you add a new item, please add it without either +++ or ---
so we will look at it and add it to the manual.


25 26 27 28 29 30 31 32 33 34
* Installation Changes in Emacs 23.2

** New configure options for Emacs developers
These are not new features; only the configure flags are new.

*** --enable-profiling builds Emacs with profiling enabled.
This might not work on all platforms.

*** --enable-checking[=OPTIONS] builds emacs with extra runtime checks.

35 36
* Changes in Emacs 23.2

37 38
** New completion-style `initials' to complete M-x lch to list-command-history.

39 40 41 42 43 44
** Unibyte sessions are declared obsolete.
I.e. the use of the environment variable EMACS_UNIBYTE, or command line
arguments --unibyte, --multibyte, --no-multibyte, and --no-unibyte
is deprecated.  Similarly for custom-izing enable-multibyte-characters, or
setting default-enable-multibyte-characters.

45 46 47 48 49 50
** The default value of `trash-directory' has changed to nil, which
means that `move-file-to-trash' trashes files according to
freedesktop.org specifications, the same method used by the Gnome,
KDE, and XFCE desktops.  (This change has no effect on Windows, which
uses `system-move-file-to-trash' for trashing.)

51 52 53 54 55
+++
** Emacs frames can be maximized.
The command line arguments -mm/--maximized and the value maximized to the
frame parameter fullscreen makes the Emacs frame maximized.

Jan Djärv's avatar
Jan Djärv committed
56 57 58
+++
** New frame parameter sticky makes Emacs frames sticky in virtual desktops.

59 60 61
** The pointer now becomes invisible when typing.
Customize make-pointer-invisible to turn it off.

62 63 64 65
---
** On MS-Windows, `display-time' now displays the system load average
as well as the time, as it does on GNU and Unix.

66 67 68 69 70
** Killing a buffer with a running process now asks a confirmation.
You can remove this query in two ways: either removing
`process-kill-buffer-query-function' from `kill-buffer-query-functions' or
setting the appropriate process flag with `set-process-query-on-exit-flag'.

71
+++
72 73 74 75 76
** If `select-active-regions' is t, any active region automatically
becomes the primary selection (for interaction with other window
applications).  If you enable this, you might want to bind
`mouse-yank-primary' to Mouse-2.

77 78 79 80 81 82 83
** The variable `load-in-progress' won't get corrupted by binding it
with `let'.  In certain situations, loading an Emacs Lisp file from
source while in the midst of loading another file (e.g., with
`require' or `autoload') could cause the value of `load-in-progress'
to be corrupted once the outer load completed.  Most code doesn't care
about this, but some (like c-mode) may check it.

84 85 86
** When `save-interprogram-paste-before-kill' is non-nil, emacs will not
clobber the the interprogram paste when something is killed in it by
saving the former in the `kill-ring' before the latter.
Glenn Morris's avatar
Glenn Morris committed
87

88 89
** When `kill-do-not-save-duplicates' is non-nil, identical subsequent
kills are not duplicated in the `kill-ring'.
Glenn Morris's avatar
Glenn Morris committed
90

91 92 93 94 95 96 97 98 99 100 101 102 103 104 105
** File-local variable changes

*** Specifying a minor mode as a local variables enables that mode,
unconditionally.  The previous behavior, toggling the mode, was
neither reliable nor generally desirable.

*** New commands for adding and removing file-local variables:
`add-file-local-variable', `delete-file-local-variable',
`add-file-local-variable-prop-line', and
`delete-file-local-variable-prop-line'.

*** New commands for adding and removing directory-local variables,
and copying them to and from file-local variable lists:
`add-dir-local-variable', `delete-dir-local-variable',
`copy-dir-locals-to-file-locals',
106 107 108
`copy-dir-locals-to-file-locals-prop-line' and
`copy-file-locals-to-dir-locals'.

109 110 111 112
** New coding system `utf-8-hfs' is available in
international/ucs-normalize.el.  It is suitable for
default-file-name-coding-system on Mac OS X.

Glenn Morris's avatar
Glenn Morris committed
113 114 115 116 117 118

* Editing Changes in Emacs 23.2

+++
** The default value for `blink-matching-paren-distance' has been increased.

119 120 121

* Changes in Specialized Modes and Packages in Emacs 23.2

122 123
** .calc.el and .abbrev_defs obey user-emacs-directory.

124 125 126 127
** Calc graphing commands (`g f' etc.) now work on MS-Windows,
if you have the native Windows port of Gnuplot version 3.8 or later
installed.

Glenn Morris's avatar
Glenn Morris committed
128 129 130
** FIXME mail-user-agent change
This probably affects a lot of documentation.

Glenn Morris's avatar
Glenn Morris committed
131 132
** FIXME gdb-mi

133 134 135 136 137
** Info

*** The new command `Info-virtual-index' bound to "I" displays a menu of
matched topics found in the index.

Juri Linkov's avatar
Juri Linkov committed
138 139 140 141
*** The new command `info-finder' replaces finder.el with a virtual Info
manual that generates an Info file which gives the same information
through a menu structure.

142 143
+++
** New connection methods in Tramp.
144 145 146
The new connection method "rsyncc" has been introduced.  On systems
which support GVFS-Fuse, Tramp offers also the new connection methods
"dav", "davs", "obex" and "synce".
147

148 149 150 151
+++
** Autorevert Tail mode
Autorevert Tail mode works now for remote files.

152 153 154 155
** VC and related modes

*** When a file is not found, VC will not try to check it out of RCS anymore.

Dan Nicolaescu's avatar
Dan Nicolaescu committed
156 157 158
*** vc-git changes

**** The new variable vc-git-add-signoff can be used to add a
Dan Nicolaescu's avatar
Dan Nicolaescu committed
159 160
Signed-off-by line when committing.

Dan Nicolaescu's avatar
Dan Nicolaescu committed
161 162
**** vc-dir displays the stash status

163 164 165
*** log-edit-strip-single-file-name controls whether or not single filenames
are stripped when copying text from the ChangeLog to the *VC-Log* buffer.

Glenn Morris's avatar
Glenn Morris committed
166 167
** Calendar and diary

Glenn Morris's avatar
Glenn Morris committed
168 169
*** The fancy diary display enables view-mode.

Glenn Morris's avatar
Glenn Morris committed
170 171 172 173
---
*** The command `calendar-current-date' accepts an optional argument
giving an offset from today.

174 175 176
** Desktop

---
177 178 179 180 181 182
*** The default value for `desktop-buffers-not-to-save' is nil.
This means Desktop will try restoring all buffers, when you restart
your Emacs session.  Also, `desktop-buffers-not-to-save' is only
effective for buffers that have no associated file.  If you want to
exempt buffers that do correspond to files, customize the value of
`desktop-files-not-to-save' instead.
183

184 185 186 187 188 189
** Miscellaneous

*** The new command `async-shell-command' bound globally to `M-&' executes
the command asynchronously without the need to manually add ampersand to
the end of the command.  Its output appears in the buffer `*Async Shell
Command*'.
Glenn Morris's avatar
Glenn Morris committed
190 191 192 193

---
*** Elint now uses compilation-mode, and recognizes more built-in
functions and variables.
Steve Yegge's avatar
Steve Yegge committed
194 195 196 197


* New Modes and Packages in Emacs 23.2

198
** js.el is a new major mode for JavaScript files.
199 200 201 202


* Lisp changes in Emacs 23.2

203 204 205
** All the default-FOO variables that hold the default value of the FOO
variable, are now declared obsolete.

206 207
** read-key is a function halfway between read-event and read-key-sequence.
It reads a single key, but obeys input and escape sequence decoding.
208

209 210
** start-process-shell-command start-file-process-shell-command only
take a single `command' argument any more.
211 212 213 214 215

** The variable `process-file-side-effects' shall be bound to nil, if
a `process-file' call does not change a remote file.  By this, file
name handlers like Tramp can apply optimizations.

216 217 218
** Hash tables have a new printed representation that is readable.
The feature `hashtable-print-readable' identifies this new
functionality.
219 220 221 222 223 224 225 226

** Functions performing Unicode normalization are added.  They are:
ucs-normalize-NFD-region, ucs-normalize-NFD-string,
ucs-normalize-NFC-region, ucs-normalize-NFC-string,
ucs-normalize-NFKD-region, ucs-normalize-NFKD-string,
ucs-normalize-NFKC-region, ucs-normalize-NFKC-string,
ucs-normalize-HFS-NFD-region, ucs-normalize-HFS-NFD-string,
ucs-normalize-HFS-NFC-region, ucs-normalize-HFS-NFC-string.
Stefan Monnier's avatar
.  
Stefan Monnier committed
227 228 229

** completion-annotate-function specifies how to compute annotations
for completions displayed in *Completions*.
230

231
+++
232 233
** Face aliases can now be marked as obsolete, using the macro
`define-obsolete-face-alias'.
234

235

236
* Installation Changes in Emacs 23.1
237

238
** The default X toolkit is now Gtk+, rather than Lucid.
Chong Yidong's avatar
Chong Yidong committed
239 240
The configure option `--with-gtk' has been removed.  Gtk is now the
default toolkit, but you can use --with-x-toolkit=gtk if necessary.
241

Chong Yidong's avatar
Chong Yidong committed
242 243
** New font code.
Fonts are handled by new code capable of dealing with multiple font
244
backends.  This uses the freetype and fontconfig libraries.
245

Chong Yidong's avatar
Chong Yidong committed
246 247
*** Emacs now accepts font names supplied in the fontconfig format
(e.g. "monospace-12:bold") and GTK format (e.g. "Monospace Bold 12").
Dan Nicolaescu's avatar
Dan Nicolaescu committed
248

Chong Yidong's avatar
Chong Yidong committed
249 250 251 252 253 254 255 256 257
*** Added support for local fonts (fonts installed on the machine
where Emacs is running).

*** Added support for the Xft library for antialiasing.

*** Added support for the otf library for complex text layout by
OpenType fonts.

*** Added support for the m17n library for text shaping.
258

Chong Yidong's avatar
Chong Yidong committed
259
** Changes to image support
260

Chong Yidong's avatar
Chong Yidong committed
261
*** configure now checks for libgif before libungif when searching for
262
a GIF library.
263

Chong Yidong's avatar
Chong Yidong committed
264 265
*** Emacs now supports the SVG image format through librsvg2.

Jason Rumney's avatar
Jason Rumney committed
266 267
*** Emacs now supports multi-page TIFF images.

Chong Yidong's avatar
Chong Yidong committed
268
** New NeXTSTEP-based port
Glenn Morris's avatar
Glenn Morris committed
269
This provides support for GNUstep (via the GNUstep libraries) and Mac
Michael Albinus's avatar
Michael Albinus committed
270
OS X (via the Cocoa libraries).
271

Glenn Morris's avatar
Glenn Morris committed
272
Specify --with-ns to configure for this.  By default, a self-contained
273 274 275
app will be built (containing all lisp).  To install/share lisp with
other emacsen (e.g. X11 build) use --disable-ns-self-contained.  See
nextstep/README and nextstep/INSTALL in the Emacs source directory.
Chong Yidong's avatar
Chong Yidong committed
276 277 278

** Mac OS X is no longer supported via Carbon.
Use the NeXTSTEP port, described above.
Glenn Morris's avatar
Glenn Morris committed
279

Chong Yidong's avatar
Chong Yidong committed
280 281
** The new configuration option "--with-dbus" enables D-Bus language
bindings for Emacs.
282

283 284
** Support for many obsolete platforms has been removed.
See the list at the end of etc/MACHINES for details.
285

Chong Yidong's avatar
Chong Yidong committed
286
*** Support for systems without alloca has been removed.
287

Chong Yidong's avatar
Chong Yidong committed
288
*** Support for Sun windows has been removed.
289

Chong Yidong's avatar
Chong Yidong committed
290
*** The `emacstool' utility has been removed.
Chong Yidong's avatar
Chong Yidong committed
291

Chong Yidong's avatar
Chong Yidong committed
292
** The following platforms will be removed in a future Emacs version:
293 294
If you are still using Emacs on one of these platforms, please email
emacs-devel@gnu.org to inform the Emacs developers.
Chong Yidong's avatar
Chong Yidong committed
295

296
*** Old GNU/Linux systems based on libc version 5.
Chong Yidong's avatar
Chong Yidong committed
297

298 299
*** Old FreeBSD, NetBSD, and OpenBSD systems based on the COFF
    executable format.
Chong Yidong's avatar
Chong Yidong committed
300 301 302

*** Solaris versions 2.6 and below.

303 304 305 306
*** Solaris on IBM RS6000 machines.

*** UNIX System V (the original SysV, not later platforms based on it).

307 308
*** Unixware on non-x86 machines.

309 310
*** Platforms not supporting shared libraries (i.e., requiring the
NO_SHARED_LIBS compilation flag).
Chong Yidong's avatar
Chong Yidong committed
311

312 313 314 315
** The configure options `--with-gcc', `--without-gcc' have been removed.
Configure will use gcc by default.  Set the CC environment variable if
you need control over which C compiler is used.

Chong Yidong's avatar
Chong Yidong committed
316 317
** The refcards are now shipped as PDF files.

Glenn Morris's avatar
Glenn Morris committed
318 319 320
** The manuals are now licensed under the GNU Free Documentation License v1.3,
or any later version.

Chong Yidong's avatar
Chong Yidong committed
321 322 323
** Emacs 23 comes with a new set of default icons.
Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png.
The Emacs 22 icon is available as `emacs22.png' in the same location.
Nick Roberts's avatar
Nick Roberts committed
324 325 326

* Changes in Emacs 23.1

Chong Yidong's avatar
Chong Yidong committed
327
** Improved X Window System support
328

Chong Yidong's avatar
Chong Yidong committed
329 330 331 332 333
*** Emacs now supports using both X displays and ttys in one session.
With an Emacs server active (M-x server-start), `emacsclient -t'
creates a tty frame connected to the running emacs server.  You can
use any number of different ttys.  `emacsclient -c' creates a new X11
frame on the current $DISPLAY (or a tty frame if $DISPLAY is not set).
334 335
There may be problems if a display exits unexpectedly and Emacs is compiled
with Gtk+, see etc/PROBLEMS.
336 337 338

You can test for the presence of this feature in your Lisp code by
testing for the `multi-tty' feature.
339 340

*** Emacs starts in the background, as a daemon, when given the
341 342 343
--daemon command line argument.  It disconnects from the terminal and
starts the server.  Clients can connect and create graphical or
terminal frames using emacsclient.
344

345
**** emacsclient starts emacs in daemon mode and connects to it when
346 347
--alternate-editor="" is used (or when the evironment variable
ALTERNATE_EDITOR is set to "") and emacsclient cannot connect to an
348 349
emacs server.

Chong Yidong's avatar
Chong Yidong committed
350
*** The new command close-display-connection closes a connection to a
351
remote display.  There are some bugs for Gtk+.  See etc/PROBLEMS.
352

Chong Yidong's avatar
Chong Yidong committed
353 354 355
*** Emacs now supports the XEmbed specification.
You can embed Emacs in another application on X11.  The new command line
option --parent-id is used to pass the parent window id to Emacs.  See
Jan Djärv's avatar
Jan Djärv committed
356 357
http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
for details about XEmbed.
358

Chong Yidong's avatar
Chong Yidong committed
359 360 361
*** Emacs can now set the frame opacity.
The opacity of a frame can be controlled by setting the `alpha' frame
parameter.  This only takes effect on a compositing window manager for
362 363
the X Window System, such as Compiz, Beryl and Compiz Fusion, on Mac
OS X, or on Windows 2000 and later versions of Windows.
364 365

The alpha parameter should be an integer between 0 (transparent) and
Chong Yidong's avatar
Chong Yidong committed
366 367
100 (opaque), or a float number between 0.0 and 1.0.  It can also be a
cons cell (ACTIVE . INACTIVE), where ACTIVE is the opacity of an
368
active frame and INACTIVE is the opacity of non-active frames.
369

Chong Yidong's avatar
Chong Yidong committed
370 371
The variable `frame-alpha-lower-limit' defines a lower bound for the
opacity; the default is 20.
372

Chong Yidong's avatar
Chong Yidong committed
373
** Internationalization changes
374

Chong Yidong's avatar
Chong Yidong committed
375 376
*** The Emacs character set is now a superset of Unicode.
(It has about four times the code space, which should be plenty).
Stefan Monnier's avatar
Stefan Monnier committed
377

Chong Yidong's avatar
Chong Yidong committed
378
The internal encoding used for buffers and strings is now
379 380 381 382
Unicode-based and called `utf-8-emacs' (`emacs-internal' is an alias
for this).  This encoding is backward-compatible with Unicode's UTF-8
encoding.  The internal encoding previously used by Emacs,
`emacs-mule', is still available for reading and writing files.
Nick Roberts's avatar
Nick Roberts committed
383

Chong Yidong's avatar
Chong Yidong committed
384 385 386
During byte-compilation, Emacs 23 uses `utf-8-emacs' to write files.
As a result, byte-compiled files containing non-ASCII characters can't
be read by earlier versions of Emacs.  Files compiled by Emacs 20, 21,
387 388 389 390
or 22 are loaded correctly as `emacs-mule' (whether or not they
contain multibyte characters).  This takes somewhat more time, so it
may be worth recompiling existing .elc files which don't need to be
shared with older Emacsen.
391

Chong Yidong's avatar
Chong Yidong committed
392
*** There are new coding systems/aliases; see M-x list-coding-systems.
393

Chong Yidong's avatar
Chong Yidong committed
394 395 396
*** There is a new charset implementation with many new charsets.
See M-x list-character-sets.  New charsets can be defined conveniently
as tables of unicodes.
Dan Nicolaescu's avatar
Dan Nicolaescu committed
397

Chong Yidong's avatar
Chong Yidong committed
398 399 400
*** There are new language environments for Chinese-GBK,
Chinese-GB18030, Khmer, Bengali, Punjabi, Gujarati, Oriya, Telugu,
Sinhala, and TaiViet.
401

Chong Yidong's avatar
Chong Yidong committed
402 403
*** The minor modes unify-8859-on-encoding-mode and
unify-8859-on-decoding-mode are obsolete.
404

405 406 407
*** `ucs-insert' is bound to `C-x 8 RET' and in addition to hex numbers
accepts numbers in hash notation (e.g. #o21430 for octal, or #10r8984 for
decimal).  It also accepts Unicode character names with completion.
408

409 410 411 412 413
*** The `cyrillic-translit' input method supports many new characters.
Common typographical characters available from Unicode were added to
`cyrillic-translit': punctuation marks, accented characters, fractions,
and others.

Chong Yidong's avatar
Chong Yidong committed
414
** Emacs now supports serial port access on GNU/Linux, Unix, and
415 416 417
Windows.  The new command `serial-term' starts an interactive terminal
on a serial port.  The serial port can be configured at runtime with
the mode-line mouse menu.
418

Chong Yidong's avatar
Chong Yidong committed
419
** Menu Bar changes
420

Chong Yidong's avatar
Chong Yidong committed
421 422 423 424 425
*** In the Options menu, the "Set Default Font" item applies the
selected font to the `default' face on all frames, not just the
current frame.  Furthermore, if Emacs is compiled with both GTK and
Fontconfig support, the "Set Default Font" item uses the GTK font
selection dialog instead of an Emacs pop-up menu.
426

Chong Yidong's avatar
Chong Yidong committed
427 428
*** The font setting chosen by "Set Default Font" is saved if the
"Save Options" item is used.
429

430 431 432
*** The Tools menu contains a new Encryption/Decryption submenu.
This contains commands provided by EasyPG, the newly-included
interface to GnuPG (see New Modes and Packages).
433

434 435 436
*** In the Options menu, the "Truncate Long Lines in the Buffer" entry
has been replaced with a submenu offering three different ways to
handle long lines: truncation, continuation at the window edge, and
437
the new word wrapping behavior (see Editing Changes, below).
438

Dan Nicolaescu's avatar
Dan Nicolaescu committed
439 440 441 442
*** Improvements to menus for major and minor modes
More major and minor modes now have a mode specific menu, and existing
mode menus have been improved to include more functionality.

Chong Yidong's avatar
Chong Yidong committed
443
** Mode-line changes
444

Chong Yidong's avatar
Chong Yidong committed
445 446
*** The mode-line displays a `@', instead of `-', if the
default-directory for the current buffer is on a remote machine.
447

Chong Yidong's avatar
Chong Yidong committed
448 449
*** The mode-line displays a mode menu when mouse-1 is clicked on a
minor mode, in the same way as it already did for major modes.
450

Chong Yidong's avatar
Chong Yidong committed
451 452
*** The `mode-line-emphasis' face is used to highlight certain
mode-line information (e.g. waiting for a VC command to finish).
453

Dan Nicolaescu's avatar
Dan Nicolaescu committed
454
*** The mode-line tooltips have been improved to provide more details.
455

Dan Nicolaescu's avatar
Dan Nicolaescu committed
456 457 458
*** The VC, line/colum number and minor mode indicators on the mode
line are now interactive: mouse-1 can be used on them to pop up a menu.

459 460
** File deletion can make use of the Recycle Bin or system Trash folder.
Set `delete-by-moving-to-trash' non-nil to use this.  Deleted files
461
and directories will then be sent to the Recycle Bin on Windows, and
462 463
to `trash-directory' on other systems.

Chong Yidong's avatar
Chong Yidong committed
464
** Directory-local variables can now be defined.
465 466 467
By default, Emacs looks in .dir-locals.el for directory-local
variables.  For more information, see `dir-locals-set-directory-class'
and `dir-locals-set-class-variables'.
468

469 470 471 472 473 474 475
** Emacs can now use `auth-source' for authentication.
`smtpmail' and `url' (Tramp and Gnus also) use `auth-source' to obtain
login names and passwords.  The match, if found, is reported
in *Messages* with the password blanked out.

** `where-is-preferred-modifier' can specify your favorite modifier.

476

477
* Startup Changes in Emacs 23.1
478

479 480 481 482 483 484
** The option `inhibit-startup-screen' (with aliases to old names
`inhibit-splash-screen' and `inhibit-startup-message') doesn't inhibit
display of the initial message in the *scratch* buffer.  If you don't
want to display the initial message in the *scratch* buffer at startup,
you can set the option `initial-scratch-message' to nil.

485 486 487 488
** New user option `initial-buffer-choice' specifies what to display
after starting Emacs: startup screen, *scratch* buffer, visiting a
file or directory.

489 490 491 492
** New alias `argv' for `command-line-args-left'
This is a convenience alias, so that one can write `(pop argv)'
inside of --eval command line arguments in order to access
following arguments.
493 494

** The abbrev file is no longer read at startup in batch mode.
495 496 497 498 499 500

** Emacs now supports invocation by an X session manager.
It can save a session and restore it later.  See the documentation of
the functions `emacs-session-save' and `emacs-session-restore'.
(Actually, this feature was introduced with Emacs 22, but it was not
documented.)
501

502
* Incompatible Editing Changes in Emacs 23.1
Kim F. Storm's avatar
Kim F. Storm committed
503

504 505 506
** In Dired, `dired-flag-garbage-files' is rebound from `&' to `%&'
on the regexp command prefix map.

507 508 509 510
** In Dired-x, all command guesses for ! are now added to the default
list accessible by M-n instead of pushing all guesses temporarily into
the history list.

511 512 513 514
** In Isearch mode, a special case of typing `C-w' at the beginning of
the minibuffer that toggles word search (i.e. using key sequences
`C-s RET C-w' or `C-s M-e C-w') is obsolete.  You can use the global key
`M-s w' to start word search, or type `M-s w' in Isearch mode to
515 516
toggle word search.  To start nonincremental word search you can now use
`M-s w RET' and `M-s w C-r RET' instead of `C-s RET C-w' and `C-r RET C-w'.
517

Juri Linkov's avatar
Juri Linkov committed
518 519 520 521 522 523 524
** In Info, `Info-search' is unbound from `M-s' to allow using `M-s w'
for word search as well as other search commands from the global prefix
key `M-s'.  `Info-search' is still bound to `s', and also incremental
search commands `C-s', `C-M-s', `C-r', `C-M-r' are available for searching
through multiple Info nodes, together with their nonincremental versions
`C-s RET', `C-r RET', `C-M-s RET', `C-M-r RET', `M-s w RET'.

525 526 527
** In Text mode, `center-line' and `center-paragraph' are rebound from
`M-s' and `M-S' to global keys `M-o M-s' and `M-o M-S' on the global
prefix map `M-o', which is intended for such formatting commands.
528

Reiner Steib's avatar
Reiner Steib committed
529
** The following input methods were removed in Emacs 22.2, but this was
Juanma Barranquero's avatar
Juanma Barranquero committed
530
not advertised: danish-alt-postfix, esperanto-alt-postfix,
Reiner Steib's avatar
Reiner Steib committed
531 532 533 534
finnish-alt-postfix, german-alt-postfix, icelandic-alt-postfix,
norwegian-alt-postfix, scandinavian-alt-postfix, spanish-alt-postfix,
and swedish-alt-postfix.  Use the versions without "alt-", which are
identical.
535

Richard M. Stallman's avatar
Richard M. Stallman committed
536

537
* Editing Changes in Emacs 23.1
Richard M. Stallman's avatar
Richard M. Stallman committed
538

539 540 541
** The C-n and C-p line-motion commands now move by screen lines,
taking continued lines and variable-width characters into account.
Setting `line-move-visual' to nil reverts this to the previous
542 543
behavior (i.e., motion by logical lines based on buffer contents
alone).
544

Chong Yidong's avatar
Chong Yidong committed
545
** C-x C-c now invokes `save-buffers-kill-terminal', and C-z now
546
invokes `suspend-frame'.  These changes are for compatibility with the
Chong Yidong's avatar
Chong Yidong committed
547
new multi-tty support (see `Improved X Window System support' above).
548

Chong Yidong's avatar
Chong Yidong committed
549
** Mark changes
550

551
*** Transient Mark mode is now on by default.
552

553
*** mark-even-if-inactive now defaults to t
554

555 556
*** When Transient Mark mode is on, C-SPC C-SPC pushes a mark without
activating it.
557

558 559
*** When Transient Mark mode is on, M-q now fills the region if the
region is active.  Otherwise, it fills the current paragraph.
560

561 562
*** When Transient Mark mode is on, M-$ now checks spelling of the
region if the region is active.  Otherwise, it checks spelling of the
Juri Linkov's avatar
Juri Linkov committed
563
word at point.
564

565 566
*** When Transient Mark mode is on, TAB now indents the region if the
region is active.
567 568 569 570

*** The variable `use-empty-active-region' controls whether an empty
active region in Transient Mark mode should make commands operate on
that empty region.
571 572

** Temporarily active regions
573

574 575 576 577
*** The new variable shift-select-mode, non-nil by default, controls
shift-selection.  When Shift Select mode is on, shift-translated
motion keys (e.g. S-left and S-down) activate and extend a temporary
region, similar to mouse-selection.
578

579 580 581 582 583 584 585
*** Temporarily active regions, created using shift-selection or
mouse-selection, are not necessarily deactivated in the next command.
They are only deactivated after point motion commands that are not
shift-translated, or after commands that would ordinarily deactivate
the mark in Transient Mark mode (e.g., any command that modifies the
buffer).

586
** Minibuffer and completion changes
587

588 589 590 591 592 593 594 595 596 597 598 599
*** Emacs may ask for confirmation before opening a non-existent file
or buffer.  By default, Emacs requests confirmation if you type RET
immediately after TAB, and the resulting input is not an existing file
or buffer; this usually happens when the minibuffer input did not
complete far enough and you entered RET by mistake.  In that case,
Emacs puts the message "[Confirm]" in the minibuffer; type RET again
to create the file or buffer.

The new variable confirm-nonexistent-file-or-buffer determines whether
Emacs asks for confirmation.  The default value is `after-completion'.
If you change it to t, Emacs always asks for confirmation; if you
change it to nil, Emacs never asks for confirmation.
600

601 602 603 604 605 606 607 608 609 610 611 612
*** The rules for performing completion have been changed.
When generating completion alternatives, Emacs now takes the
minibuffer text after point, if any, into account: this text is
treated as a substring of the remaining part of the completion
alternative (i.e., the part not matched by the minibuffer text before
point).  If no completion alternatives are found this way, Emacs
attempts to perform partial-completion.  If still no completion
alternatives are found, we fall back on the Emacs 22 rules for
performing completion.

The new variable `completion-styles' can be customized to choose your
favorite completion style.
613

614 615 616 617 618 619
*** When M-n in the minibuffer reaches the end of the list of defaults,
it adds the completion list to the end, so next M-n continues putting
completion items to the minibuffer.  The same principle applies to
incremental search commands as well: C-s or C-M-s starts searching
the default values and after the end of defaults they continue
searching minibuffer completion items.
620

Chong Yidong's avatar
Chong Yidong committed
621
*** Minibuffer input of shell commands now comes with completion.
622

Chong Yidong's avatar
Chong Yidong committed
623 624
*** In the `C-x d' (Dired) prompt, typing M-n gives the visited file
name of the current buffer.
625

Chong Yidong's avatar
Chong Yidong committed
626 627 628 629 630
*** In the M-! (shell-command) prompt, M-n provides some default commands.
These are guessed using the file extension of the current file, based
on the file-handlers specified in the operating system's `mailcap'
file.  The ! command in Dired (dired-do-shell-command) works
similarly, using the file displayed on the current line.
631 632 633

*** A list of regexp default values is available via M-n for `occur',
`keep-lines', `flush-lines' and `how-many'.  This list includes the active
Juri Linkov's avatar
Juri Linkov committed
634 635
region in transient-mark-mode, the word under the cursor, the last Isearch
regexp, the last Isearch string and the last replacement regexp.
636

637 638 639 640 641
*** When enable-recursive-minibuffers is non-nil, operations which use
switch-to-buffer (such as C-x b and C-x C-f) do not fail any more when
used in a minibuffer or a dedicated window.  Instead, they fallback on
using pop-to-buffer, which will use some other window.  This change
has no effect when enable-recursive-minibuffers is nil (the default).
642

Juri Linkov's avatar
Juri Linkov committed
643 644 645
*** Isearch started in the minibuffer searches in the minibuffer history.
Reverse Isearch commands (C-r, C-M-r) search in previous minibuffer
history elements, and forward Isearch commands (C-s, C-M-s) search in
646 647 648 649
next history elements.  When the reverse search reaches the first history
element, it wraps to the last history element, and the forward search
wraps to the first history element.  When the search is terminated, the
history element containing the search string becomes the current.
650

651 652
*** The variable read-file-name-completion-ignore-case overrides
completion-ignore-case for file name completion.
653

654 655
*** The variable read-buffer-completion-ignore-case overrides
completion-ignore-case for buffer name completion.
656

657 658
*** The new command `minibuffer-force-complete' chooses one of the
possible completions, rather than stopping at the common prefix.
659

660 661 662
*** If `completion-auto-help' is `lazy', Emacs shows the completions
buffer only on the second attempt to complete.  This was already
supported in `partial-completion-mode'.
663

664
** Face changes
665

666 667
*** S-down-mouse-1 now pops up a menu for changing the font and text
size of the default face in the current buffer.  The face is changed
Chong Yidong's avatar
Chong Yidong committed
668
via face remapping (see Lisp changes, below).
669

670 671 672
*** New commands to change the default face size in the current buffer.
To increase it, type `C-x C-+' or `C-x C-='.  To decrease it, type
`C-x C--'.  To restore the default (global) face size, type `C-x C-0'.
673 674 675 676 677 678 679
These work via Text Scale mode, a new minor mode.

The final key in the above commands may be repeated without the
leading `C-x', e.g. `C-x C-= C-= C-=' increases the face height by
three steps.  Each step scales the height of the default face by the
value of the variable `text-scale-mode-step'.

680 681 682
*** The commands buffer-face-mode and buffer-face-set can be used to
remap the default face in the current buffer.  See "Buffer Face mode",
under New Modes and Packages.
Glenn Morris's avatar
Glenn Morris committed
683

Chong Yidong's avatar
Chong Yidong committed
684
** Primary selection changes
685

686 687
*** You can disable kill ring commands from accessing the primary
selection by setting `x-select-enable-primary' to nil.
688

689 690 691 692 693 694 695 696
** Continuation lines can now be wrapped at word boundaries
(word-wrapping).  This is controlled by the new per-buffer variable
`word-wrap'.  Word wrapping does not take place if continuation lines
are not shown, e.g. if truncate-lines is non-nil.  The most convenient
way to enable word-wrapping is using the new minor mode Visual Line
mode; in addition to setting `word-wrap' to t, this rebinds some
editing commands to work on screen lines rather than text lines.  See
New Modes and Packages, below.
Chong Yidong's avatar
Chong Yidong committed
697

698
** Window management changes
699

700 701
*** truncate-partial-width-windows now accepts integer values, which
specify a minimum window width for partial-width windows, below which
702
lines are truncated.  The default has been changed to 50.
703 704 705

*** The new command balance-windows-area balances windows both
vertically and horizontally.
706

Martin Rudalics's avatar
Martin Rudalics committed
707 708 709
*** pop-to-buffer now always sets input focus when the popped-to window
is on a different frame.

Chong Yidong's avatar
Chong Yidong committed
710
** Miscellaneous changes:
711

Chong Yidong's avatar
Chong Yidong committed
712 713
*** C-l is bound to the new command recenter-top-bottom, rather than recenter.
This moves the current line to window center, top and bottom on
Chong Yidong's avatar
Chong Yidong committed
714
successive invocations.
715

Chong Yidong's avatar
Chong Yidong committed
716
*** scroll-preserve-screen-position also preserves the column position.
717

Chong Yidong's avatar
Chong Yidong committed
718 719 720
*** If `yank-pop-change-selection' is t, rotating the kill ring also
updates the selection or clipboard to the current yank, just as M-w
would do so with the text it copies to the kill ring.
721

Chong Yidong's avatar
Chong Yidong committed
722 723 724 725 726 727 728 729
*** C-M-% now shows replacement as it would look in the buffer, with
`\N' and `\&' substituted according to the match.  Old behavior can be
restored by customizing `query-replace-show-replacement'.

*** The command shell prompts for the default directory, when it is
called with a prefix and the default directory is a remote file name.
This is because some file name handlers (like ange-ftp) are not able to
run processes remotely.
730

Chong Yidong's avatar
Chong Yidong committed
731 732
*** The new command kill-matching-buffers kills buffers whose name
matches a regexp.
733

734 735 736
*** The value of comment-style now defaults to `indent'.
Thefore, comment-start markers are inserted at the current indentation
of the region to comment, rather than the leftmost column.
737

738 739
*** The new commands `pp-macroexpand-expression' and
`pp-macroexpand-last-sexp' pretty-print macro expansions.
740

741 742
*** The new command `set-file-modes' allows to set file's mode bits.
The mode bits can be specified in symbolic notation, like with GNU
743 744
Coreutils, in addition to an octal number.  `chmod' is a new
convenience alias for this function.
Eli Zaretskii's avatar
Eli Zaretskii committed
745

Eli Zaretskii's avatar
Eli Zaretskii committed
746 747 748
*** `next-error-recenter' specifies how next-error should recenter the
visited source file.  Its value can be a number (for example, 0 for
top line, -1 for bottom line), or nil for no recentering.
749

750 751
*** When typing in a password in the echo area, C-y yanks the current
kill into the password.
752

753 754
*** Tooltip frame parameters `font' and `color' in `tooltip-frame-parameters'
are ignored.  Customize the `tooltip' face instead.
755

Dan Nicolaescu's avatar
Dan Nicolaescu committed
756
*** `mkdir' is a new convenience alias for `make-directory'.
Chong Yidong's avatar
Chong Yidong committed
757 758

* New Modes and Packages in Emacs 23.1
759 760 761 762 763

** Auto Composition Mode is a minor mode that composes characters
automatically when they are displayed.  It is globally on by default.
It uses `auto-composition-function' (default `auto-compose-chars').

Chong Yidong's avatar
Chong Yidong committed
764
** Bubbles, a new game, is similar to SameGame.
765 766 767 768 769 770 771 772

** Buffer Face mode is a minor mode for remapping the default face in
the current buffer.  The variable `buffer-face-mode-face' specifies
the face to remap to.  The command `buffer-face-set' prompts for a
face name, sets `buffer-face-mode-face' to it, and enables
buffer-face-mode.  See "Face changes", under Editing Changes, for a
description of face remapping.

Juri Linkov's avatar
Juri Linkov committed
773 774
** butterfly flips the desired bit on the drive platter.
See http://xkcd.com/378/
775

776 777
** bug-reference.el provides clickable links to bug reports.

Chong Yidong's avatar
Chong Yidong committed
778 779
** dbus.el provides D-Bus language bindings.
D-Bus is an inter-process communication mechanism for applications
780
residing on the same host.  See the manual for details.
Chong Yidong's avatar
Chong Yidong committed
781

782
** DocView mode allows viewing of PDF, PostScript and DVI documents.
783 784
One can also search for a regular expression in the document.  For
details, see the commentary in doc-view.el.
Chong Yidong's avatar
Chong Yidong committed
785

786 787 788 789
PDF and DVI files are now opened in Doc View mode by default.

In Postcript mode, C-c C-c launches Doc View minor mode for viewing
the postscript file.
790

791 792 793 794
** EasyPG provides an interface to the GNU Privacy Guard (GnuPG).
It includes a GnuPG keyring browser, cryptographic operations on
regions and files, and automatic encryption of *.gpg files.  For
details, see the EasyPG Assistant User's Manual.
Chong Yidong's avatar
Chong Yidong committed
795 796 797 798 799 800 801

** json.el is a library for parsing and generating JSON
(JavaScript Object Notation), a lightweight data-interchange format.

** linum.el is a new minor mode to display line numbers for the
current buffer.

802 803 804 805 806 807
** mairix.el is an interface to mairix, a free tool for indexing and
searching locally stored mail.  It allows you to query mairix and
display the search results with Rmail, Gnus and VM.  Note that there
is an existing Gnus back end, nnmairix.el, which should be used with
Maildir/MH setups.

808
** minibuffer-depth-indicate-mode shows the minibuffer depth in the prompt.
Chong Yidong's avatar
Chong Yidong committed
809 810 811 812 813 814 815 816 817 818 819 820 821

** nXML Mode
This is a new mode for editing XML documents.  It allows a schema to
be associated with the XML document being edited, using Relax NG as
the schema language.  The schema is used to provide two key features:

*** Continuous validation.  nXML validates as you type, highlighting
any invalid parts of your document.

*** Completion.  nXML can assist you in entering an element name,
attribute name or data value by using information about what is
allowed by the schema in that context.

822 823 824 825 826 827
** proced.el provides a Dired-like interface for operating on
processes.  Proced makes an Emacs buffer containing a listing of the
current processes.  You can use the normal Emacs commands to move
around in this buffer, and special Proced commands to operate on the
processes listed.  It is currently only functional on GNU/Linux,
MS-Windows and Solaris.
Chong Yidong's avatar
Chong Yidong committed
828 829 830 831 832

** Remember Mode is a mode for jotting down things to remember.
Notes can be saved to a Diary file.  For details, see the Remember
Manual.

833
** RST mode is a major mode for editing reStructuredText files.
834

Chong Yidong's avatar
Chong Yidong committed
835 836
** Ruby mode is a major mode for Ruby files.

Chong Yidong's avatar
Chong Yidong committed
837 838 839 840
** Visual Line mode provides support for editing by visual lines.
It turns on word-wrapping in the current buffer, and rebinds C-a, C-e,
and C-k to commands that operate by visual lines instead of logical
lines.  This is a more reliable replacement for longlines-mode.
841 842
This can also be turned on using the menu bar, via
Options -> Line Wrapping in this Buffer -> Word Wrap
Chong Yidong's avatar
Chong Yidong committed
843

Michael Albinus's avatar
Michael Albinus committed
844 845 846 847
** xesam.el is an implementation of Xesam, an interface to (desktop)
search engines like Beagle, Strigi, and Tracker.  The Xesam API
requires D-Bus for communication.

Chong Yidong's avatar
Chong Yidong committed
848 849 850 851 852
** zeroconf.el offers service discovery and service publishing
interfaces according to the zeroconf specification.  It communicates
with Avahi, a zeroconf implementation, via D-Bus messages on systems
which have installed this software.

853 854 855 856 857 858 859 860 861
** There is a new `whitespace' package.
(The pre-existing one has been renamed to `old-whitespace'.)
Now, besides reporting bogus blanks, the whitespace package has a
minor mode and a global minor mode to visualize blanks (TAB, (HARD)
SPACE and NEWLINE).  The visualization is made via faces and/or display
table.  It can also indicate lines that extend beyond a given column,
trailing blanks, and empty lines at the start or end of a buffer.
See `whitespace-style' for more details.  The `whitespace-action' option
specifies what to do when a buffer is visited, killed, or written.
862

Chong Yidong's avatar
Chong Yidong committed
863 864 865 866

* Changes in Specialized Modes and Packages in Emacs 23.1

** Abbrev has been rewritten in Elisp and extended with more flexibility.
867

Stefan Monnier's avatar
Stefan Monnier committed
868
*** New functions: abbrev-get, abbrev-put, abbrev-table-get, abbrev-table-put,
869
    abbrev-table-p, abbrev-insert, abbrev-table-menu.
870

Stefan Monnier's avatar
Stefan Monnier committed
871
*** Special hook `abbrev-expand-functions' obsoletes `pre-abbrev-expand-hook'.
872

Stefan Monnier's avatar
Stefan Monnier committed
873 874
*** `make-abbrev-table', `define-abbrev', `define-abbrev-table' all take
    extra arguments for arbitrary properties.
875

Stefan Monnier's avatar
Stefan Monnier committed
876
*** New variable `abbrev-minor-mode-table-alist'.
877

Stefan Monnier's avatar
Stefan Monnier committed
878
*** `local-abbrev-table' can hold a list of abbrev-tables.
879

Stefan Monnier's avatar
Stefan Monnier committed
880
*** Abbrevs have now the following special properties:
881
    `:count', `:system', `:enable-function', `:case-fixed'.
882

Stefan Monnier's avatar
Stefan Monnier committed
883 884 885 886
*** Abbrev-tables have now the following special properties:
    `:parents', `:case-fixed', `:enable-function', `:regexp',
    `abbrev-table-modiff'.

Chong Yidong's avatar
Chong Yidong committed
887
** Apropos
888

Chong Yidong's avatar
Chong Yidong committed
889
*** `apropos-library' describes the elements defined in a given library.
890

Chong Yidong's avatar
Chong Yidong committed
891
*** Set `apropos-compact-layout' is you want a more compact (but wider) layout.
Martin Rudalics's avatar
Martin Rudalics committed
892

Chong Yidong's avatar
Chong Yidong committed
893
** Archive Mode has basic support to browse Rar archives.
894 895
Note, however, that the free version of the unrar command only handles
versions 1 and 2 of the Rar format.
Martin Rudalics's avatar
Martin Rudalics committed
896

Chong Yidong's avatar
Chong Yidong committed
897
** BibTeX mode
Juri Linkov's avatar
Juri Linkov committed
898

Chong Yidong's avatar
Chong Yidong committed
899
*** New command `bibtex-initialize' (re)initializes BibTeX buffers.
Juri Linkov's avatar
Juri Linkov committed
900

Chong Yidong's avatar
Chong Yidong committed
901 902
*** New `bibtex-entry-format' options `whitespace', `braces', and
`string', disabled by default.
Juri Linkov's avatar
Juri Linkov committed
903

Chong Yidong's avatar
Chong Yidong committed
904 905
*** New variable `bibtex-cite-matcher-alist' contains rules to
identify cited keys in BibTeX entries, used by `bibtex-find-crossref'.
906

Chong Yidong's avatar
Chong Yidong committed
907
*** Command `bibtex-url' allows multiple URLs per entry.
Glenn Morris's avatar
Glenn Morris committed
908

Chong Yidong's avatar
Chong Yidong committed
909
** Calendar and diary
Juri Linkov's avatar
Juri Linkov committed
910

Chong Yidong's avatar
Chong Yidong committed
911 912 913 914
*** There is a new date style, `iso', essentially year/month/day.
The variable `european-calendar-style' is obsolete - use `calendar-date-style'.
Similarly, the commands `american-calendar' and `european-calendar'
should be replaced by `calendar-set-date-style'.
Stefan Monnier's avatar
Stefan Monnier committed
915

Chong Yidong's avatar
Chong Yidong committed
916 917 918 919 920 921 922
*** The calendar namespace has been rationalized.
All functions and variables now begin with a `calendar-', `diary-', or
`holiday-' prefix.  The various calendar systems have secondary
prefixes, eg `calendar-french-'.  The old names you are likely to use
directly still exist, for the time being, as aliases, but please start
using the new names.

923 924 925 926 927 928 929 930
*** The whitespace in the calendar layout can be customized.
See the variables:
calendar-left-margin, calendar-intermonth-spacing, calendar-column-width,
calendar-day-header-width, and calendar-day-digit-width.

*** Text (e.g. ISO weeks) can be displayed between the calendar months.
See the variables calendar-intermonth-header and calendar-intermonth-text.

Chong Yidong's avatar
Chong Yidong committed
931 932 933 934 935
*** The function `holiday-chinese' computes holidays on the Chinese calendar.
It has been used to add items to the list `holiday-oriental-holidays'.

*** `diary-remind' accepts a negative number -DAYS as a shorthand for
the list (1 2 ... DAYS).
936

937 938 939 940 941 942 943 944
** Change Log mode

*** The new command C-c C-f (change-log-find-file) finds the file
associated with the current log entry.

*** The new command C-c C-c (change-log-goto-source) goes to the
source code associated with a log entry.

Dan Nicolaescu's avatar
Dan Nicolaescu committed
945
** Compile and grep modes
946

Dan Nicolaescu's avatar
Dan Nicolaescu committed
947 948 949
*** The mode-line entry for the *compilation* and *grep* buffer is color coded.
It has different colors for to show that: (a) the command is still
running, (b) successful completion, (c) error.
950

Dan Nicolaescu's avatar
Dan Nicolaescu committed
951
*** compilation-auto-jump-to-first-error tells `compile' to jump to
952
the first error encountered during compilations.
953

954 955
*** compilation-scroll-output accepts a new value, `first-error', which
says to stop auto scrolling at the first error that occurs.
956

Dan Nicolaescu's avatar
Dan Nicolaescu committed
957
*** The `cc' alias for C++ files in `grep-file-aliases' has been