NEWS 88 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.

Glenn Morris's avatar
Glenn Morris committed
35 36 37 38
---
** `make install' now consistently ignores umask, creating a
world-readable install.

Chong Yidong's avatar
Chong Yidong committed
39
* Startup Changes in Emacs 23.2
40

41
** Command-line option -Q (--quick) now also disables loading X resources.
Glenn Morris's avatar
Glenn Morris committed
42 43 44 45
Note however that this does not affect Lucid or Motif widgets, if you
are using those toolkits.  On Windows, this option causes Emacs to
ignore Registry settings, though environment variables set on the
Registry are still honored.
Chong Yidong's avatar
Chong Yidong committed
46 47 48

*** The new variable `inhibit-x-resources' shows whether X resources
were loaded.
49

Chong Yidong's avatar
Chong Yidong committed
50
* Changes in Emacs 23.2
51

52 53 54
** The maximum size of buffers (as well as the largest fixnum) is doubled.
On typical 32bit systems, buffers can now be up to 512MB.

55 56 57
** Function arguments in *Help* buffers are now in uppercase by default.
You can customize the new variable `help-downcase-arguments' to change it.

Chong Yidong's avatar
Chong Yidong committed
58
** Unibyte sessions are now considered obsolete.
59 60 61 62 63
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.

64 65 66 67 68 69
** 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.)

70 71 72 73 74
+++
** 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
75 76 77
+++
** New frame parameter sticky makes Emacs frames sticky in virtual desktops.

78 79 80
** The pointer now becomes invisible when typing.
Customize make-pointer-invisible to turn it off.

81 82 83 84 85 86 87 88 89 90 91 92
** Emacs can use the system default monospaced font in Gnome.
The use of the system default font can be turned on or off by customizing
the variable 'font-use-system-font'.  It is off by default.
If the system default is changed, Emacs changes also.
This requires that gconf-support is built in.  If configure finds the
gconf-libraries, that support is included. Gconf-support can be
turned off with the configure option --without-gconf.

** Emacs now reacts to Xft-changes made by configuration tools on X11.
Changes to antialias, hinting, hintstyle, RGBA, DPI and lcdfilter are
handeled.  The XSETTINGS mechanism is used to implement this.

Chong Yidong's avatar
Chong Yidong committed
93 94 95 96
** Killing a buffer with a running process now asks for confirmation.
You can remove this query in two ways: either remove
`process-kill-buffer-query-function' from `kill-buffer-query-functions',
or set the appropriate process flag with `set-process-query-on-exit-flag'.
97

98 99 100 101 102 103 104
** 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.

105 106 107 108 109 110 111 112 113 114 115 116 117 118 119
** 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',
120 121 122
`copy-dir-locals-to-file-locals-prop-line' and
`copy-file-locals-to-dir-locals'.

123 124 125 126
** 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
127 128 129

* Editing Changes in Emacs 23.2

Chong Yidong's avatar
Chong Yidong committed
130 131 132 133 134 135 136 137 138 139 140 141 142 143
** Selection changes
+++
*** 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.

*** 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.

** 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
144 145 146
+++
** The default value for `blink-matching-paren-distance' has been increased.

Chong Yidong's avatar
Chong Yidong committed
147 148 149
** The new completion-style `initials' is available.
For instance, this can complete M-x lch to list-command-history.

150 151 152

* Changes in Specialized Modes and Packages in Emacs 23.2

153 154
** lucid.el and levents.el are now declared obsolete.

155 156 157
** pcomplete provides a new command `pcomplete-std-completion' which
is similar to `pcomplete' but using the standard completion UI code.

158 159
** .calc.el and .abbrev_defs obey user-emacs-directory.

160 161 162 163
** 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.

Chong Yidong's avatar
Chong Yidong committed
164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183
** Calendar and diary

*** Fancy diary display is now the default.
If you prefer the simple display, customize `diary-display-function'.

*** The diary's fancy display now enables view-mode.

---
*** The command `calendar-current-date' accepts an optional argument
giving an offset from today.

** Desktop
---
*** 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.

Glenn Morris's avatar
Glenn Morris committed
184 185 186
** FIXME mail-user-agent change
This probably affects a lot of documentation.

Glenn Morris's avatar
Glenn Morris committed
187 188
** FIXME gdb-mi

189 190 191 192 193
** 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
194 195 196 197
*** 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.

198 199
+++
** New connection methods in Tramp.
200 201 202
The new connection methods "rsyncc", "imap" and "imaps" have been
introduced.  On systems which support GVFS-Fuse, Tramp offers also the
new connection methods "dav", "davs", "obex" and "synce".
203

Chong Yidong's avatar
Chong Yidong committed
204
** nXML mode is now the default for editing XML files.
205

206 207
** VC and related modes

208 209 210 211 212
*** When using C-x v v or C-x v i on a unregistered file that is in a
directory not controlled by any VCS, ask the user what VC backend to
use to create a repository, create a new repository and register the
file.

213 214 215
*** FIXME: add info about the new VC functions: vc-root-diff and
vc-root-print-log once they stabilize.

216 217 218 219 220 221 222
*** The log functions (C-x v l and C-x v L) do not show the full log
by default anymore.  The number of entries shown can be chosen
interactively with a prefix argument, by customizing
vc-log-show-limit.  The log buffer display buttons that can be used
to change the number of entries shown.
RCS, SCCS, CVS and Git do not support this feature.

223 224 225 226 227
*** vc-annotate supports annotations through file copies and renames,
it displays the old names for the files and it can show logs/diffs for
the corresponding lines.  Currently only Git and Mercurial take
advantage of this feature.

228 229
*** When a file is not found, VC will not try to check it out of RCS anymore.

Dan Nicolaescu's avatar
Dan Nicolaescu committed
230 231 232
*** vc-git changes

**** The new variable vc-git-add-signoff can be used to add a
Dan Nicolaescu's avatar
Dan Nicolaescu committed
233 234
Signed-off-by line when committing.

235 236 237 238
**** Support for operating with stashes has been added to vc-dir: the stash list is
displayed in the *vc-dir* header, stashes can be created, removed and
their content displayed.

Dan Nicolaescu's avatar
Dan Nicolaescu committed
239 240
**** vc-dir displays the stash status

241 242 243
*** 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
244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263
** Elint

---
*** Elint now uses compilation-mode.

---
*** Elint can now scan individual files and whole directories,
and can be run in batch mode.

---
*** Elint does a more thorough initialization, and recognizes more built-in
functions and variables.  Customize `elint-scan-preloaded' if you want
to sacrifice some accuracy for a faster startup.

---
*** Elint attempts some basic understanding of featurep and (f)boundp tests.

---
*** Customize `elint-ignored-warnings' to suppress some warnings.

264 265 266 267 268 269
** 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
270

Chong Yidong's avatar
Chong Yidong committed
271 272 273
+++
*** Autorevert Tail mode now works now for remote files.

Steve Yegge's avatar
Steve Yegge committed
274 275 276

* New Modes and Packages in Emacs 23.2

Chong Yidong's avatar
Chong Yidong committed
277 278
** FIXME CEDET

279
** js.el is a new major mode for JavaScript files.
280

281 282
** imap-hash.el is a new library to address IMAP mailboxes as hashtables.

283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298

* Incompatible Lisp Changes in Emacs 23.2

** Several obsolete functions removed.
The functions have been obsolete since Emacs 19, and are unlikely to
be in use:

  time-stamp-month-dd-yyyy, time-stamp-dd/mm/yyyy, time-stamp-mon-dd-yyyy
  time-stamp-dd-mon-yy, time-stamp-yy/mm/dd, time-stamp-yyyy/mm/dd,
  time-stamp-yyyy-mm-dd, time-stamp-yymmdd, time-stamp-hh:mm:ss,
  time-stamp-hhmm, baud-rate

---
** Support for generating Emacs 18 compatible bytecode (by setting
the variable `byte-compile-compatibility') has been removed.

299 300 301

* Lisp changes in Emacs 23.2

302 303 304
** New function `completion-in-region' to use the standard completion
facilities on a particular region of text.

305 306
** The 4th arg to all-completions (aka hide-spaces) is declared obsolete.

307 308 309 310 311
** read-file-name-predicate is obsolete.  It was used to pass the predicate
to read-file-name-internal because read-file-name-internal abused its `pred'
argument to pass the current directory, but this hack is not needed
any more.

312 313 314 315 316 317
** completion-base-size is obsoleted by completion-base-position.
This change causes a few backward incompatibilities, mostly with
choose-completion-string-functions where the `mini-p' argument has
been replaced by a `base-position' argument, and where the `base-size'
argument is now always nil.

318 319
** called-interactively-p now takes one argument and replaces interactive-p
which is now marked obsolete.
320 321
** New function set-advertised-calling-convention makes it possible
to obsolete arguments as well as make some arguments mandatory.
322
** eval-next-after-load is obsolete.
323 324
** New hook `after-load-functions' run after loading an Elisp file.

325 326 327 328 329
** You can control which binding is preferentially shown in menus and
docstrings by adding a `:advertised-binding' property to the corresponding
command's symbol.  That property can hold a single binding or a list
of bindings.

330 331
** New macro with-silent-modifications to tweak text properties without
affecting the buffer's modification state.
332 333 334
** All the default-FOO variables that hold the default value of the FOO
variable, are now declared obsolete.

335 336
** 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.
337

Glenn Morris's avatar
Glenn Morris committed
338 339
** start-process-shell-command and start-file-process-shell-command
now only take a single `command' argument.
340 341 342 343 344

** 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.

345 346 347
** Hash tables have a new printed representation that is readable.
The feature `hashtable-print-readable' identifies this new
functionality.
348 349 350 351 352 353 354 355

** 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
356 357 358

** completion-annotate-function specifies how to compute annotations
for completions displayed in *Completions*.
359

360
+++
361 362
** Face aliases can now be marked as obsolete, using the macro
`define-obsolete-face-alias'.
363 364 365 366 367

---
** Changing the file-names generated by byte-compilation by redefining
the function `byte-compile-dest-file' before loading bytecomp.el is obsolete.
Instead, customize byte-compile-dest-file-function.
Chong Yidong's avatar
Chong Yidong committed
368

369 370 371
---
** `byte-compile-warnings' can have a new member, `constants'.

372 373
** `delete-directory' has an optional parameter RECURSIVE.

374 375
** New function `copy-directory', which copies a directory recursively.

376
+++
Glenn Morris's avatar
Glenn Morris committed
377 378
** New function `window-full-height-p', analogous to the full-width version.

379

Chong Yidong's avatar
Chong Yidong committed
380 381 382 383 384
* Changes in Emacs 23.2 on non-free operating systems

---
** On MS-Windows, `display-time' now displays the system load average
as well as the time, as it does on GNU and Unix.
385

386

387
* Installation Changes in Emacs 23.1
388

389
** The default X toolkit is now Gtk+, rather than Lucid.
Chong Yidong's avatar
Chong Yidong committed
390 391
The configure option `--with-gtk' has been removed.  Gtk is now the
default toolkit, but you can use --with-x-toolkit=gtk if necessary.
392

Chong Yidong's avatar
Chong Yidong committed
393 394
** New font code.
Fonts are handled by new code capable of dealing with multiple font
395
backends.  This uses the freetype and fontconfig libraries.
396

Chong Yidong's avatar
Chong Yidong committed
397 398
*** 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
399

Chong Yidong's avatar
Chong Yidong committed
400 401 402 403 404 405 406 407 408
*** 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.
409

Chong Yidong's avatar
Chong Yidong committed
410
** Changes to image support
411

Chong Yidong's avatar
Chong Yidong committed
412
*** configure now checks for libgif before libungif when searching for
413
a GIF library.
414

Chong Yidong's avatar
Chong Yidong committed
415 416
*** Emacs now supports the SVG image format through librsvg2.

Jason Rumney's avatar
Jason Rumney committed
417 418
*** Emacs now supports multi-page TIFF images.

Chong Yidong's avatar
Chong Yidong committed
419
** New NeXTSTEP-based port
Glenn Morris's avatar
Glenn Morris committed
420
This provides support for GNUstep (via the GNUstep libraries) and Mac
Michael Albinus's avatar
Michael Albinus committed
421
OS X (via the Cocoa libraries).
422

Glenn Morris's avatar
Glenn Morris committed
423
Specify --with-ns to configure for this.  By default, a self-contained
424 425 426
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
427 428 429

** Mac OS X is no longer supported via Carbon.
Use the NeXTSTEP port, described above.
Glenn Morris's avatar
Glenn Morris committed
430

Chong Yidong's avatar
Chong Yidong committed
431 432
** The new configuration option "--with-dbus" enables D-Bus language
bindings for Emacs.
433

434 435
** Support for many obsolete platforms has been removed.
See the list at the end of etc/MACHINES for details.
436

Chong Yidong's avatar
Chong Yidong committed
437
*** Support for systems without alloca has been removed.
438

Chong Yidong's avatar
Chong Yidong committed
439
*** Support for Sun windows has been removed.
440

Chong Yidong's avatar
Chong Yidong committed
441
*** The `emacstool' utility has been removed.
Chong Yidong's avatar
Chong Yidong committed
442

Chong Yidong's avatar
Chong Yidong committed
443
** The following platforms will be removed in a future Emacs version:
444 445
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
446

447
*** Old GNU/Linux systems based on libc version 5.
Chong Yidong's avatar
Chong Yidong committed
448

449 450
*** Old FreeBSD, NetBSD, and OpenBSD systems based on the COFF
    executable format.
Chong Yidong's avatar
Chong Yidong committed
451 452 453

*** Solaris versions 2.6 and below.

454 455 456 457
*** Solaris on IBM RS6000 machines.

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

458 459
*** Unixware on non-x86 machines.

460 461
*** Platforms not supporting shared libraries (i.e., requiring the
NO_SHARED_LIBS compilation flag).
Chong Yidong's avatar
Chong Yidong committed
462

463 464 465 466
** 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
467 468
** The refcards are now shipped as PDF files.

Glenn Morris's avatar
Glenn Morris committed
469 470 471
** The manuals are now licensed under the GNU Free Documentation License v1.3,
or any later version.

Chong Yidong's avatar
Chong Yidong committed
472 473 474
** 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
475 476 477

* Changes in Emacs 23.1

Chong Yidong's avatar
Chong Yidong committed
478
** Improved X Window System support
479

Chong Yidong's avatar
Chong Yidong committed
480 481 482 483 484
*** 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).
485 486
There may be problems if a display exits unexpectedly and Emacs is compiled
with Gtk+, see etc/PROBLEMS.
487 488 489

You can test for the presence of this feature in your Lisp code by
testing for the `multi-tty' feature.
490 491

*** Emacs starts in the background, as a daemon, when given the
492 493 494
--daemon command line argument.  It disconnects from the terminal and
starts the server.  Clients can connect and create graphical or
terminal frames using emacsclient.
495

496
**** emacsclient starts emacs in daemon mode and connects to it when
497 498
--alternate-editor="" is used (or when the evironment variable
ALTERNATE_EDITOR is set to "") and emacsclient cannot connect to an
499 500
emacs server.

Chong Yidong's avatar
Chong Yidong committed
501
*** The new command close-display-connection closes a connection to a
502
remote display.  There are some bugs for Gtk+.  See etc/PROBLEMS.
503

Chong Yidong's avatar
Chong Yidong committed
504 505 506
*** 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
507 508
http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
for details about XEmbed.
509

Chong Yidong's avatar
Chong Yidong committed
510 511 512
*** 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
513 514
the X Window System, such as Compiz, Beryl and Compiz Fusion, on Mac
OS X, or on Windows 2000 and later versions of Windows.
515 516

The alpha parameter should be an integer between 0 (transparent) and
Chong Yidong's avatar
Chong Yidong committed
517 518
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
519
active frame and INACTIVE is the opacity of non-active frames.
520

Chong Yidong's avatar
Chong Yidong committed
521 522
The variable `frame-alpha-lower-limit' defines a lower bound for the
opacity; the default is 20.
523

Chong Yidong's avatar
Chong Yidong committed
524
** Internationalization changes
525

Chong Yidong's avatar
Chong Yidong committed
526 527
*** 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
528

Chong Yidong's avatar
Chong Yidong committed
529
The internal encoding used for buffers and strings is now
530 531 532 533
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
534

Chong Yidong's avatar
Chong Yidong committed
535 536 537
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,
538 539 540 541
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.
542

Chong Yidong's avatar
Chong Yidong committed
543
*** There are new coding systems/aliases; see M-x list-coding-systems.
544

Chong Yidong's avatar
Chong Yidong committed
545 546 547
*** 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
548

Chong Yidong's avatar
Chong Yidong committed
549 550 551
*** There are new language environments for Chinese-GBK,
Chinese-GB18030, Khmer, Bengali, Punjabi, Gujarati, Oriya, Telugu,
Sinhala, and TaiViet.
552

Chong Yidong's avatar
Chong Yidong committed
553 554
*** The minor modes unify-8859-on-encoding-mode and
unify-8859-on-decoding-mode are obsolete.
555

556 557 558
*** `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.
559

560 561 562 563 564
*** 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
565
** Emacs now supports serial port access on GNU/Linux, Unix, and
566 567 568
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.
569

Chong Yidong's avatar
Chong Yidong committed
570
** Menu Bar changes
571

Chong Yidong's avatar
Chong Yidong committed
572 573 574 575 576
*** 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.
577

Chong Yidong's avatar
Chong Yidong committed
578 579
*** The font setting chosen by "Set Default Font" is saved if the
"Save Options" item is used.
580

581 582 583
*** 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).
584

585 586 587
*** 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
588
the new word wrapping behavior (see Editing Changes, below).
589

Dan Nicolaescu's avatar
Dan Nicolaescu committed
590 591 592 593
*** 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
594
** Mode-line changes
595

Chong Yidong's avatar
Chong Yidong committed
596 597
*** The mode-line displays a `@', instead of `-', if the
default-directory for the current buffer is on a remote machine.
598

Chong Yidong's avatar
Chong Yidong committed
599 600
*** 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.
601

Chong Yidong's avatar
Chong Yidong committed
602 603
*** The `mode-line-emphasis' face is used to highlight certain
mode-line information (e.g. waiting for a VC command to finish).
604

Dan Nicolaescu's avatar
Dan Nicolaescu committed
605
*** The mode-line tooltips have been improved to provide more details.
606

Dan Nicolaescu's avatar
Dan Nicolaescu committed
607 608 609
*** 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.

610 611
** 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
612
and directories will then be sent to the Recycle Bin on Windows, and
613 614
to `trash-directory' on other systems.

Chong Yidong's avatar
Chong Yidong committed
615
** Directory-local variables can now be defined.
616 617 618
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'.
619

620 621 622 623 624 625 626
** 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.

627

628
* Startup Changes in Emacs 23.1
629

630 631 632 633 634 635
** 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.

636 637 638 639
** New user option `initial-buffer-choice' specifies what to display
after starting Emacs: startup screen, *scratch* buffer, visiting a
file or directory.

640 641 642 643
** 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.
644 645

** The abbrev file is no longer read at startup in batch mode.
646 647 648 649 650 651

** 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.)
652

653
* Incompatible Editing Changes in Emacs 23.1
Kim F. Storm's avatar
Kim F. Storm committed
654

655 656 657
** In Dired, `dired-flag-garbage-files' is rebound from `&' to `%&'
on the regexp command prefix map.

658 659 660 661
** 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.

662 663 664 665
** 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
666 667
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'.
668

Juri Linkov's avatar
Juri Linkov committed
669 670 671 672 673 674 675
** 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'.

676 677 678
** 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.
679

Reiner Steib's avatar
Reiner Steib committed
680
** The following input methods were removed in Emacs 22.2, but this was
Juanma Barranquero's avatar
Juanma Barranquero committed
681
not advertised: danish-alt-postfix, esperanto-alt-postfix,
Reiner Steib's avatar
Reiner Steib committed
682 683 684 685
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.
686

Richard M. Stallman's avatar
Richard M. Stallman committed
687

688
* Editing Changes in Emacs 23.1
Richard M. Stallman's avatar
Richard M. Stallman committed
689

690 691 692
** 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
693 694
behavior (i.e., motion by logical lines based on buffer contents
alone).
695

Chong Yidong's avatar
Chong Yidong committed
696
** C-x C-c now invokes `save-buffers-kill-terminal', and C-z now
697
invokes `suspend-frame'.  These changes are for compatibility with the
Chong Yidong's avatar
Chong Yidong committed
698
new multi-tty support (see `Improved X Window System support' above).
699

Chong Yidong's avatar
Chong Yidong committed
700
** Mark changes
701

702
*** Transient Mark mode is now on by default.
703

704
*** mark-even-if-inactive now defaults to t
705

706 707
*** When Transient Mark mode is on, C-SPC C-SPC pushes a mark without
activating it.
708

709 710
*** When Transient Mark mode is on, M-q now fills the region if the
region is active.  Otherwise, it fills the current paragraph.
711

712 713
*** 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
714
word at point.
715

716 717
*** When Transient Mark mode is on, TAB now indents the region if the
region is active.
718 719 720 721

*** The variable `use-empty-active-region' controls whether an empty
active region in Transient Mark mode should make commands operate on
that empty region.
722 723

** Temporarily active regions
724

725 726 727 728
*** 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.
729

730 731 732 733 734 735 736
*** 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).

737
** Minibuffer and completion changes
738

739 740 741 742 743 744 745 746 747 748 749 750
*** 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.
751

752 753 754 755 756 757 758 759 760 761 762 763
*** 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.
764

765 766 767 768 769 770
*** 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.
771

Chong Yidong's avatar
Chong Yidong committed
772
*** Minibuffer input of shell commands now comes with completion.
773

Chong Yidong's avatar
Chong Yidong committed
774 775
*** In the `C-x d' (Dired) prompt, typing M-n gives the visited file
name of the current buffer.
776

Chong Yidong's avatar
Chong Yidong committed
777 778 779 780 781
*** 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.
782 783 784

*** 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
785 786
region in transient-mark-mode, the word under the cursor, the last Isearch
regexp, the last Isearch string and the last replacement regexp.
787

788 789 790 791 792
*** 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).
793

Juri Linkov's avatar
Juri Linkov committed
794 795 796
*** 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
797 798 799 800
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.
801

802 803
*** The variable read-file-name-completion-ignore-case overrides
completion-ignore-case for file name completion.
804

805 806
*** The variable read-buffer-completion-ignore-case overrides
completion-ignore-case for buffer name completion.
807

808 809
*** The new command `minibuffer-force-complete' chooses one of the
possible completions, rather than stopping at the common prefix.
810

811 812 813
*** 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'.
814

815
** Face changes
816

817 818
*** 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
819
via face remapping (see Lisp changes, below).
820

821 822 823
*** 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'.
824 825 826 827 828 829 830
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'.

831 832 833
*** 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
834

Chong Yidong's avatar
Chong Yidong committed
835
** Primary selection changes
836

837 838
*** You can disable kill ring commands from accessing the primary
selection by setting `x-select-enable-primary' to nil.
839

840 841 842 843 844 845 846 847
** 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
848

849
** Window management changes
850

851 852
*** truncate-partial-width-windows now accepts integer values, which
specify a minimum window width for partial-width windows, below which
853
lines are truncated.  The default has been changed to 50.
854 855 856

*** The new command balance-windows-area balances windows both
vertically and horizontally.
857

Martin Rudalics's avatar
Martin Rudalics committed
858 859 860
*** 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
861
** Miscellaneous changes:
862

Chong Yidong's avatar
Chong Yidong committed
863 864
*** 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
865
successive invocations.
866

Chong Yidong's avatar
Chong Yidong committed
867
*** scroll-preserve-screen-position also preserves the column position.
868

Chong Yidong's avatar
Chong Yidong committed
869 870 871
*** 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.
872

Chong Yidong's avatar
Chong Yidong committed
873 874 875 876 877 878 879 880
*** 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.
881

Chong Yidong's avatar
Chong Yidong committed
882 883
*** The new command kill-matching-buffers kills buffers whose name
matches a regexp.
884

885 886 887
*** 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.
888

889 890
*** The new commands `pp-macroexpand-expression' and
`pp-macroexpand-last-sexp' pretty-print macro expansions.
891

892 893
*** 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
894 895
Coreutils, in addition to an octal number.  `chmod' is a new
convenience alias for this function.
Eli Zaretskii's avatar
Eli Zaretskii committed
896

Eli Zaretskii's avatar
Eli Zaretskii committed
897 898 899
*** `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.
900

901 902
*** When typing in a password in the echo area, C-y yanks the current
kill into the password.
903

904 905
*** Tooltip frame parameters `font' and `color' in `tooltip-frame-parameters'
are ignored.  Customize the `tooltip' face instead.
906

Dan Nicolaescu's avatar
Dan Nicolaescu committed
907
*** `mkdir' is a new convenience alias for `make-directory'.
Chong Yidong's avatar
Chong Yidong committed
908 909

* New Modes and Packages in Emacs 23.1
910 911 912 913 914

** 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
915
** Bubbles, a new game, is similar to SameGame.
916 917 918 919 920 921 922 923

** 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
924 925
** butterfly flips the desired bit on the drive platter.
See http://xkcd.com/378/
926

927 928
** bug-reference.el provides clickable links to bug reports.

Chong Yidong's avatar
Chong Yidong committed
929 930
** dbus.el provides D-Bus language bindings.
D-Bus is an inter-process communication mechanism for applications
931
residing on the same host.  See the manual for details.
Chong Yidong's avatar
Chong Yidong committed
932

933
** DocView mode allows viewing of PDF, PostScript and DVI documents.
934 935
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
936

937 938 939 940
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.
941

942 943 944 945
** 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
946 947 948 949 950 951 952

** 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.

953 954 955 956 957 958
** 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.

959
** minibuffer-depth-indicate-mode shows the minibuffer depth in the prompt.
Chong Yidong's avatar
Chong Yidong committed
960 961 962 963 964 965 966 967 968 969 970 971 972

** 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.

973 974 975 976 977 978
** 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
979 980 981 982 983

** 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.

984
** RST mode is a major mode for editing reStructuredText files.
985

Chong Yidong's avatar
Chong Yidong committed
986 987
** Ruby mode is a major mode for Ruby files.

Chong Yidong's avatar
Chong Yidong committed
988 989 990 991
** 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.
992 993
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
994

Michael Albinus's avatar
Michael Albinus committed
995 996 997 998
** 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
999 1000 1001 1002 1003
** 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.

1004 1005 1006 1007 1008 1009 1010 1011 1012
** 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.
1013

Chong Yidong's avatar
Chong Yidong committed
1014 1015 1016 1017

* Changes in Specialized Modes and Packages in Emacs 23.1

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