NEWS 84.6 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.
Chong Yidong's avatar
Chong Yidong committed
42 43 44 45 46
On Windows, this option causes Emacs to ignore Registry settings,
though environment variables set on the Registry are still honored.

*** The new variable `inhibit-x-resources' shows whether X resources
were loaded.
47

Chong Yidong's avatar
Chong Yidong committed
48
* Changes in Emacs 23.2
49

50 51 52
** 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
53
** Unibyte sessions are now considered obsolete.
54 55 56 57 58
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.

59 60 61 62 63 64
** 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.)

65 66 67 68 69
+++
** 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
70 71 72
+++
** New frame parameter sticky makes Emacs frames sticky in virtual desktops.

73 74 75
** The pointer now becomes invisible when typing.
Customize make-pointer-invisible to turn it off.

76 77 78 79 80
** 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'.

81 82 83 84 85 86 87
** 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.

88 89 90 91 92 93 94 95 96 97 98 99 100 101 102
** 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',
103 104 105
`copy-dir-locals-to-file-locals-prop-line' and
`copy-file-locals-to-dir-locals'.

106 107 108 109
** 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
110 111 112

* Editing Changes in Emacs 23.2

Chong Yidong's avatar
Chong Yidong committed
113 114 115 116 117 118 119 120 121 122 123 124 125 126
** 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
127 128 129
+++
** The default value for `blink-matching-paren-distance' has been increased.

Chong Yidong's avatar
Chong Yidong committed
130 131 132
** The new completion-style `initials' is available.
For instance, this can complete M-x lch to list-command-history.

133 134 135

* Changes in Specialized Modes and Packages in Emacs 23.2

136 137
** .calc.el and .abbrev_defs obey user-emacs-directory.

138 139 140 141
** 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
142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161
** 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
162 163 164
** FIXME mail-user-agent change
This probably affects a lot of documentation.

Glenn Morris's avatar
Glenn Morris committed
165 166
** FIXME gdb-mi

167 168 169 170 171
** 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
172 173 174 175
*** 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.

176 177
+++
** New connection methods in Tramp.
178 179 180
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".
181

Chong Yidong's avatar
Chong Yidong committed
182
** nXML mode is now the default for editing XML files.
183

184 185
** VC and related modes

186 187 188
*** FIXME: add info about the new VC functions: vc-root-diff and
vc-root-print-log once they stabilize.

189 190
*** When a file is not found, VC will not try to check it out of RCS anymore.

Dan Nicolaescu's avatar
Dan Nicolaescu committed
191 192 193
*** vc-git changes

**** The new variable vc-git-add-signoff can be used to add a
Dan Nicolaescu's avatar
Dan Nicolaescu committed
194 195
Signed-off-by line when committing.

196 197 198 199
**** 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
200 201
**** vc-dir displays the stash status

202 203 204
*** 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
205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224
** 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.

225 226 227 228 229 230
** 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
231

Chong Yidong's avatar
Chong Yidong committed
232 233 234
+++
*** Autorevert Tail mode now works now for remote files.

Steve Yegge's avatar
Steve Yegge committed
235 236 237

* New Modes and Packages in Emacs 23.2

Chong Yidong's avatar
Chong Yidong committed
238 239
** FIXME CEDET

240
** js.el is a new major mode for JavaScript files.
241

242 243
** imap-hash.el is a new library to address IMAP mailboxes as hashtables.

244 245 246

* Lisp changes in Emacs 23.2

247
** eval-next-after-load is obsolete.
248 249
** New hook `after-load-functions' run after loading an Elisp file.

250 251 252 253 254
** 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.

255 256
** New macro with-silent-modifications to tweak text properties without
affecting the buffer's modification state.
257 258 259
** All the default-FOO variables that hold the default value of the FOO
variable, are now declared obsolete.

260 261
** 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.
262

Glenn Morris's avatar
Glenn Morris committed
263 264
** start-process-shell-command and start-file-process-shell-command
now only take a single `command' argument.
265 266 267 268 269

** 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.

270 271 272
** Hash tables have a new printed representation that is readable.
The feature `hashtable-print-readable' identifies this new
functionality.
273 274 275 276 277 278 279 280

** 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
281 282 283

** completion-annotate-function specifies how to compute annotations
for completions displayed in *Completions*.
284

285
+++
286 287
** Face aliases can now be marked as obsolete, using the macro
`define-obsolete-face-alias'.
288 289 290 291 292

---
** 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
293

294 295 296 297 298 299 300 301 302
** 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

Chong Yidong's avatar
Chong Yidong committed
303 304 305 306 307
* 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.
308

309

310
* Installation Changes in Emacs 23.1
311

312
** The default X toolkit is now Gtk+, rather than Lucid.
Chong Yidong's avatar
Chong Yidong committed
313 314
The configure option `--with-gtk' has been removed.  Gtk is now the
default toolkit, but you can use --with-x-toolkit=gtk if necessary.
315

Chong Yidong's avatar
Chong Yidong committed
316 317
** New font code.
Fonts are handled by new code capable of dealing with multiple font
318
backends.  This uses the freetype and fontconfig libraries.
319

Chong Yidong's avatar
Chong Yidong committed
320 321
*** 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
322

Chong Yidong's avatar
Chong Yidong committed
323 324 325 326 327 328 329 330 331
*** 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.
332

Chong Yidong's avatar
Chong Yidong committed
333
** Changes to image support
334

Chong Yidong's avatar
Chong Yidong committed
335
*** configure now checks for libgif before libungif when searching for
336
a GIF library.
337

Chong Yidong's avatar
Chong Yidong committed
338 339
*** Emacs now supports the SVG image format through librsvg2.

Jason Rumney's avatar
Jason Rumney committed
340 341
*** Emacs now supports multi-page TIFF images.

Chong Yidong's avatar
Chong Yidong committed
342
** New NeXTSTEP-based port
Glenn Morris's avatar
Glenn Morris committed
343
This provides support for GNUstep (via the GNUstep libraries) and Mac
Michael Albinus's avatar
Michael Albinus committed
344
OS X (via the Cocoa libraries).
345

Glenn Morris's avatar
Glenn Morris committed
346
Specify --with-ns to configure for this.  By default, a self-contained
347 348 349
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
350 351 352

** Mac OS X is no longer supported via Carbon.
Use the NeXTSTEP port, described above.
Glenn Morris's avatar
Glenn Morris committed
353

Chong Yidong's avatar
Chong Yidong committed
354 355
** The new configuration option "--with-dbus" enables D-Bus language
bindings for Emacs.
356

357 358
** Support for many obsolete platforms has been removed.
See the list at the end of etc/MACHINES for details.
359

Chong Yidong's avatar
Chong Yidong committed
360
*** Support for systems without alloca has been removed.
361

Chong Yidong's avatar
Chong Yidong committed
362
*** Support for Sun windows has been removed.
363

Chong Yidong's avatar
Chong Yidong committed
364
*** The `emacstool' utility has been removed.
Chong Yidong's avatar
Chong Yidong committed
365

Chong Yidong's avatar
Chong Yidong committed
366
** The following platforms will be removed in a future Emacs version:
367 368
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
369

370
*** Old GNU/Linux systems based on libc version 5.
Chong Yidong's avatar
Chong Yidong committed
371

372 373
*** Old FreeBSD, NetBSD, and OpenBSD systems based on the COFF
    executable format.
Chong Yidong's avatar
Chong Yidong committed
374 375 376

*** Solaris versions 2.6 and below.

377 378 379 380
*** Solaris on IBM RS6000 machines.

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

381 382
*** Unixware on non-x86 machines.

383 384
*** Platforms not supporting shared libraries (i.e., requiring the
NO_SHARED_LIBS compilation flag).
Chong Yidong's avatar
Chong Yidong committed
385

386 387 388 389
** 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
390 391
** The refcards are now shipped as PDF files.

Glenn Morris's avatar
Glenn Morris committed
392 393 394
** The manuals are now licensed under the GNU Free Documentation License v1.3,
or any later version.

Chong Yidong's avatar
Chong Yidong committed
395 396 397
** 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
398 399 400

* Changes in Emacs 23.1

Chong Yidong's avatar
Chong Yidong committed
401
** Improved X Window System support
402

Chong Yidong's avatar
Chong Yidong committed
403 404 405 406 407
*** 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).
408 409
There may be problems if a display exits unexpectedly and Emacs is compiled
with Gtk+, see etc/PROBLEMS.
410 411 412

You can test for the presence of this feature in your Lisp code by
testing for the `multi-tty' feature.
413 414

*** Emacs starts in the background, as a daemon, when given the
415 416 417
--daemon command line argument.  It disconnects from the terminal and
starts the server.  Clients can connect and create graphical or
terminal frames using emacsclient.
418

419
**** emacsclient starts emacs in daemon mode and connects to it when
420 421
--alternate-editor="" is used (or when the evironment variable
ALTERNATE_EDITOR is set to "") and emacsclient cannot connect to an
422 423
emacs server.

Chong Yidong's avatar
Chong Yidong committed
424
*** The new command close-display-connection closes a connection to a
425
remote display.  There are some bugs for Gtk+.  See etc/PROBLEMS.
426

Chong Yidong's avatar
Chong Yidong committed
427 428 429
*** 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
430 431
http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
for details about XEmbed.
432

Chong Yidong's avatar
Chong Yidong committed
433 434 435
*** 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
436 437
the X Window System, such as Compiz, Beryl and Compiz Fusion, on Mac
OS X, or on Windows 2000 and later versions of Windows.
438 439

The alpha parameter should be an integer between 0 (transparent) and
Chong Yidong's avatar
Chong Yidong committed
440 441
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
442
active frame and INACTIVE is the opacity of non-active frames.
443

Chong Yidong's avatar
Chong Yidong committed
444 445
The variable `frame-alpha-lower-limit' defines a lower bound for the
opacity; the default is 20.
446

Chong Yidong's avatar
Chong Yidong committed
447
** Internationalization changes
448

Chong Yidong's avatar
Chong Yidong committed
449 450
*** 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
451

Chong Yidong's avatar
Chong Yidong committed
452
The internal encoding used for buffers and strings is now
453 454 455 456
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
457

Chong Yidong's avatar
Chong Yidong committed
458 459 460
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,
461 462 463 464
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.
465

Chong Yidong's avatar
Chong Yidong committed
466
*** There are new coding systems/aliases; see M-x list-coding-systems.
467

Chong Yidong's avatar
Chong Yidong committed
468 469 470
*** 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
471

Chong Yidong's avatar
Chong Yidong committed
472 473 474
*** There are new language environments for Chinese-GBK,
Chinese-GB18030, Khmer, Bengali, Punjabi, Gujarati, Oriya, Telugu,
Sinhala, and TaiViet.
475

Chong Yidong's avatar
Chong Yidong committed
476 477
*** The minor modes unify-8859-on-encoding-mode and
unify-8859-on-decoding-mode are obsolete.
478

479 480 481
*** `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.
482

483 484 485 486 487
*** 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
488
** Emacs now supports serial port access on GNU/Linux, Unix, and
489 490 491
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.
492

Chong Yidong's avatar
Chong Yidong committed
493
** Menu Bar changes
494

Chong Yidong's avatar
Chong Yidong committed
495 496 497 498 499
*** 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.
500

Chong Yidong's avatar
Chong Yidong committed
501 502
*** The font setting chosen by "Set Default Font" is saved if the
"Save Options" item is used.
503

504 505 506
*** 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).
507

508 509 510
*** 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
511
the new word wrapping behavior (see Editing Changes, below).
512

Dan Nicolaescu's avatar
Dan Nicolaescu committed
513 514 515 516
*** 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
517
** Mode-line changes
518

Chong Yidong's avatar
Chong Yidong committed
519 520
*** The mode-line displays a `@', instead of `-', if the
default-directory for the current buffer is on a remote machine.
521

Chong Yidong's avatar
Chong Yidong committed
522 523
*** 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.
524

Chong Yidong's avatar
Chong Yidong committed
525 526
*** The `mode-line-emphasis' face is used to highlight certain
mode-line information (e.g. waiting for a VC command to finish).
527

Dan Nicolaescu's avatar
Dan Nicolaescu committed
528
*** The mode-line tooltips have been improved to provide more details.
529

Dan Nicolaescu's avatar
Dan Nicolaescu committed
530 531 532
*** 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.

533 534
** 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
535
and directories will then be sent to the Recycle Bin on Windows, and
536 537
to `trash-directory' on other systems.

Chong Yidong's avatar
Chong Yidong committed
538
** Directory-local variables can now be defined.
539 540 541
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'.
542

543 544 545 546 547 548 549
** 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.

550

551
* Startup Changes in Emacs 23.1
552

553 554 555 556 557 558
** 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.

559 560 561 562
** New user option `initial-buffer-choice' specifies what to display
after starting Emacs: startup screen, *scratch* buffer, visiting a
file or directory.

563 564 565 566
** 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.
567 568

** The abbrev file is no longer read at startup in batch mode.
569 570 571 572 573 574

** 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.)
575

576
* Incompatible Editing Changes in Emacs 23.1
Kim F. Storm's avatar
Kim F. Storm committed
577

578 579 580
** In Dired, `dired-flag-garbage-files' is rebound from `&' to `%&'
on the regexp command prefix map.

581 582 583 584
** 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.

585 586 587 588
** 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
589 590
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'.
591

Juri Linkov's avatar
Juri Linkov committed
592 593 594 595 596 597 598
** 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'.

599 600 601
** 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.
602

Reiner Steib's avatar
Reiner Steib committed
603
** The following input methods were removed in Emacs 22.2, but this was
Juanma Barranquero's avatar
Juanma Barranquero committed
604
not advertised: danish-alt-postfix, esperanto-alt-postfix,
Reiner Steib's avatar
Reiner Steib committed
605 606 607 608
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.
609

Richard M. Stallman's avatar
Richard M. Stallman committed
610

611
* Editing Changes in Emacs 23.1
Richard M. Stallman's avatar
Richard M. Stallman committed
612

613 614 615
** 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
616 617
behavior (i.e., motion by logical lines based on buffer contents
alone).
618

Chong Yidong's avatar
Chong Yidong committed
619
** C-x C-c now invokes `save-buffers-kill-terminal', and C-z now
620
invokes `suspend-frame'.  These changes are for compatibility with the
Chong Yidong's avatar
Chong Yidong committed
621
new multi-tty support (see `Improved X Window System support' above).
622

Chong Yidong's avatar
Chong Yidong committed
623
** Mark changes
624

625
*** Transient Mark mode is now on by default.
626

627
*** mark-even-if-inactive now defaults to t
628

629 630
*** When Transient Mark mode is on, C-SPC C-SPC pushes a mark without
activating it.
631

632 633
*** When Transient Mark mode is on, M-q now fills the region if the
region is active.  Otherwise, it fills the current paragraph.
634

635 636
*** 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
637
word at point.
638

639 640
*** When Transient Mark mode is on, TAB now indents the region if the
region is active.
641 642 643 644

*** The variable `use-empty-active-region' controls whether an empty
active region in Transient Mark mode should make commands operate on
that empty region.
645 646

** Temporarily active regions
647

648 649 650 651
*** 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.
652

653 654 655 656 657 658 659
*** 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).

660
** Minibuffer and completion changes
661

662 663 664 665 666 667 668 669 670 671 672 673
*** 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.
674

675 676 677 678 679 680 681 682 683 684 685 686
*** 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.
687

688 689 690 691 692 693
*** 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.
694

Chong Yidong's avatar
Chong Yidong committed
695
*** Minibuffer input of shell commands now comes with completion.
696

Chong Yidong's avatar
Chong Yidong committed
697 698
*** In the `C-x d' (Dired) prompt, typing M-n gives the visited file
name of the current buffer.
699

Chong Yidong's avatar
Chong Yidong committed
700 701 702 703 704
*** 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.
705 706 707

*** 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
708 709
region in transient-mark-mode, the word under the cursor, the last Isearch
regexp, the last Isearch string and the last replacement regexp.
710

711 712 713 714 715
*** 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).
716

Juri Linkov's avatar
Juri Linkov committed
717 718 719
*** 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
720 721 722 723
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.
724

725 726
*** The variable read-file-name-completion-ignore-case overrides
completion-ignore-case for file name completion.
727

728 729
*** The variable read-buffer-completion-ignore-case overrides
completion-ignore-case for buffer name completion.
730

731 732
*** The new command `minibuffer-force-complete' chooses one of the
possible completions, rather than stopping at the common prefix.
733

734 735 736
*** 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'.
737

738
** Face changes
739

740 741
*** 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
742
via face remapping (see Lisp changes, below).
743

744 745 746
*** 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'.
747 748 749 750 751 752 753
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'.

754 755 756
*** 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
757

Chong Yidong's avatar
Chong Yidong committed
758
** Primary selection changes
759

760 761
*** You can disable kill ring commands from accessing the primary
selection by setting `x-select-enable-primary' to nil.
762

763 764 765 766 767 768 769 770
** 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
771

772
** Window management changes
773

774 775
*** truncate-partial-width-windows now accepts integer values, which
specify a minimum window width for partial-width windows, below which
776
lines are truncated.  The default has been changed to 50.
777 778 779

*** The new command balance-windows-area balances windows both
vertically and horizontally.
780

Martin Rudalics's avatar
Martin Rudalics committed
781 782 783
*** 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
784
** Miscellaneous changes:
785

Chong Yidong's avatar
Chong Yidong committed
786 787
*** 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
788
successive invocations.
789

Chong Yidong's avatar
Chong Yidong committed
790
*** scroll-preserve-screen-position also preserves the column position.
791

Chong Yidong's avatar
Chong Yidong committed
792 793 794
*** 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.
795

Chong Yidong's avatar
Chong Yidong committed
796 797 798 799 800 801 802 803
*** 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.
804

Chong Yidong's avatar
Chong Yidong committed
805 806
*** The new command kill-matching-buffers kills buffers whose name
matches a regexp.
807

808 809 810
*** 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.
811

812 813
*** The new commands `pp-macroexpand-expression' and
`pp-macroexpand-last-sexp' pretty-print macro expansions.
814

815 816
*** 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
817 818
Coreutils, in addition to an octal number.  `chmod' is a new
convenience alias for this function.
Eli Zaretskii's avatar
Eli Zaretskii committed
819

Eli Zaretskii's avatar
Eli Zaretskii committed
820 821 822
*** `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.
823

824 825
*** When typing in a password in the echo area, C-y yanks the current
kill into the password.
826

827 828
*** Tooltip frame parameters `font' and `color' in `tooltip-frame-parameters'
are ignored.  Customize the `tooltip' face instead.
829

Dan Nicolaescu's avatar
Dan Nicolaescu committed
830
*** `mkdir' is a new convenience alias for `make-directory'.
Chong Yidong's avatar
Chong Yidong committed
831 832

* New Modes and Packages in Emacs 23.1
833 834 835 836 837

** 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
838
** Bubbles, a new game, is similar to SameGame.
839 840 841 842 843 844 845 846

** 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
847 848
** butterfly flips the desired bit on the drive platter.
See http://xkcd.com/378/
849

850 851
** bug-reference.el provides clickable links to bug reports.

Chong Yidong's avatar
Chong Yidong committed
852 853
** dbus.el provides D-Bus language bindings.
D-Bus is an inter-process communication mechanism for applications
854
residing on the same host.  See the manual for details.
Chong Yidong's avatar
Chong Yidong committed
855

856
** DocView mode allows viewing of PDF, PostScript and DVI documents.
857 858
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
859

860 861 862 863
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.
864

865 866 867 868
** 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
869 870 871 872 873 874 875

** 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.

876 877 878 879 880 881
** 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.

882
** minibuffer-depth-indicate-mode shows the minibuffer depth in the prompt.
Chong Yidong's avatar
Chong Yidong committed
883 884 885 886 887 888 889 890 891 892 893 894 895

** 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.

896 897 898 899 900 901
** 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
902 903 904 905 906

** 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.

907
** RST mode is a major mode for editing reStructuredText files.
908

Chong Yidong's avatar
Chong Yidong committed
909 910
** Ruby mode is a major mode for Ruby files.

Chong Yidong's avatar
Chong Yidong committed
911 912 913 914
** 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.
915 916
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
917

Michael Albinus's avatar
Michael Albinus committed
918 919 920 921
** 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
922 923 924 925 926
** 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.

927 928 929 930 931 932 933 934 935
** 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.
936

Chong Yidong's avatar
Chong Yidong committed
937 938 939 940

* Changes in Specialized Modes and Packages in Emacs 23.1

** Abbrev has been rewritten in Elisp and extended with more flexibility.
941

Stefan Monnier's avatar
Stefan Monnier committed
942
*** New functions: abbrev-get, abbrev-put, abbrev-table-get, abbrev-table-put,
943
    abbrev-table-p, abbrev-insert, abbrev-table-menu.
944

Stefan Monnier's avatar
Stefan Monnier committed
945
*** Special hook `abbrev-expand-functions' obsoletes `pre-abbrev-expand-hook'.
946

Stefan Monnier's avatar
Stefan Monnier committed
947 948
*** `make-abbrev-table', `define-abbrev', `define-abbrev-table' all take
    extra arguments for arbitrary properties.
949

Stefan Monnier's avatar
Stefan Monnier committed
950
*** New variable `abbrev-minor-mode-table-alist'.
951

Stefan Monnier's avatar
Stefan Monnier committed
952
*** `local-abbrev-table' can hold a list of abbrev-tables.
953

Stefan Monnier's avatar
Stefan Monnier committed
954
*** Abbrevs have now the following special properties:
955
    `:count', `:system', `:enable-function', `:case-fixed'.
956

Stefan Monnier's avatar
Stefan Monnier committed
957 958 959 960
*** Abbrev-tables have now the following special properties:
    `:parents', `:case-fixed', `:enable-function', `:regexp',
    `abbrev-table-modiff'.

Chong Yidong's avatar
Chong Yidong committed
961
** Apropos
962

Chong Yidong's avatar
Chong Yidong committed
963
*** `apropos-library' describes the elements defined in a given library.
964

Chong Yidong's avatar
Chong Yidong committed
965
*** Set `apropos-compact-layout' is you want a more compact (but wider) layout.
Martin Rudalics's avatar
Martin Rudalics committed
966

Chong Yidong's avatar
Chong Yidong committed
967
** Archive Mode has basic support to browse Rar archives.
968 969
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
970

Chong Yidong's avatar
Chong Yidong committed
971
** BibTeX mode
Juri Linkov's avatar
Juri Linkov committed
972

Chong Yidong's avatar
Chong Yidong committed
973
*** New command `bibtex-initialize' (re)initializes BibTeX buffers.
Juri Linkov's avatar
Juri Linkov committed
974

Chong Yidong's avatar
Chong Yidong committed
975 976
*** New `bibtex-entry-format' options `whitespace', `braces', and
`string', disabled by default.
Juri Linkov's avatar
Juri Linkov committed
977

Chong Yidong's avatar
Chong Yidong committed
978 979
*** New variable `bibtex-cite-matcher-alist' contains rules to
identify cited keys in BibTeX entries, used by `bibtex-find-crossref'.