NEWS 93.8 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 40 41
** Emacs compiles with Gconf support by default, if it is detected.
Use the configure option --without-gconf to disable this.

Chong Yidong's avatar
Chong Yidong committed
42
* Startup Changes in Emacs 23.2
43

Chong Yidong's avatar
Chong Yidong committed
44 45 46 47 48
** The command-line option -Q (--quick) also inhibits loading X resources.
However, if Emacs is compiled with the Lucid or Motif toolkit, X
resource settings for the graphical widgets are still applied.
On Windows, the -Q option causes Emacs to ignore Registry settings,
but environment variables set on the Registry are still honored.
Chong Yidong's avatar
Chong Yidong committed
49 50 51

*** The new variable `inhibit-x-resources' shows whether X resources
were loaded.
52

Chong Yidong's avatar
Chong Yidong committed
53 54 55
+++
** New command-line option -mm (--maximized) maximizes the initial frame.

Chong Yidong's avatar
Chong Yidong committed
56
* Changes in Emacs 23.2
57

Chong Yidong's avatar
Chong Yidong committed
58
** The maximum size of buffers (and the largest fixnum) is doubled.
59 60
On typical 32bit systems, buffers can now be up to 512MB.

Chong Yidong's avatar
Chong Yidong committed
61 62
** The default value of `trash-directory' is now nil.
This means that `move-file-to-trash' trashes files according to
63 64 65 66
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.)

67
** The pointer now becomes invisible when typing.
Chong Yidong's avatar
Chong Yidong committed
68
Customize `make-pointer-invisible' to disable this feature.
69

Chong Yidong's avatar
Chong Yidong committed
70
** Font changes
71

Chong Yidong's avatar
Chong Yidong committed
72 73 74 75 76 77
*** Emacs can use the system default monospaced font in Gnome.
To enable this feature, set `font-use-system-font' to non-nil (it is
nil by default).  If the system default changes, Emacs changes also.
This feature requires Gconf support, which is automatically included
at compile-time if configure detects the gconf libraries (you can
disable this with the configure option --without-gconf).
78

Chong Yidong's avatar
Chong Yidong committed
79 80 81
*** On X11, Emacs reacts to Xft changes made by configuration tools,
via the XSETTINGS mechanism.  This includes antialias, hinting,
hintstyle, RGBA, DPI and lcdfilter changes.
82

Chong Yidong's avatar
Chong Yidong committed
83 84 85 86
** Killing a buffer with a running process now asks for confirmation.
To remove this query, remove `process-kill-buffer-query-function' from
`kill-buffer-query-functions', or set the appropriate process flag
with `set-process-query-on-exit-flag'.
87

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'.

Chong Yidong's avatar
Chong Yidong committed
106 107 108 109 110 111 112 113 114 115 116 117 118 119
** Internationalization changes

*** Unibyte sessions are now considered obsolete.
This refers to the EMACS_UNIBYTE environment variable as well as the
--unibyte, --multibyte, --no-multibyte, and --no-unibyte command line
arguments.  Customizing enable-multibyte-characters and setting
default-enable-multibyte-characters are also deprecated.

*** New coding system `utf-8-hfs'.
This is suitable for default-file-name-coding-system on Mac OS X; see
international/ucs-normalize.el.

** Function arguments in *Help* buffers are now shown in upper-case.
Customize `help-downcase-arguments' to t to show them in lower-case.
120

Glenn Morris's avatar
Glenn Morris committed
121 122 123

* Editing Changes in Emacs 23.2

Chong Yidong's avatar
Chong Yidong committed
124
** Kill-ring and selection changes
Chong Yidong's avatar
Chong Yidong committed
125 126 127 128 129 130
+++
*** 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.

Chong Yidong's avatar
Chong Yidong committed
131 132 133
*** When `save-interprogram-paste-before-kill' is non-nil, the kill
commands save the interprogram-paste selection into the kill ring
before doing anything else.  This avoids losing the selection.
Chong Yidong's avatar
Chong Yidong committed
134

Chong Yidong's avatar
Chong Yidong committed
135 136
*** When `kill-do-not-save-duplicates' is non-nil, identical
subsequent kills are not duplicated in the `kill-ring'.
Chong Yidong's avatar
Chong Yidong committed
137

Chong Yidong's avatar
Chong Yidong committed
138
** Completion changes
Glenn Morris's avatar
Glenn Morris committed
139

140 141 142 143
*** The new command `completion-at-point' provides mode-sensitive completion.

*** tab-always-indent set to `complete' lets TAB do completion as well.

Chong Yidong's avatar
Chong Yidong committed
144
*** The new completion-style `initials' is available.
Chong Yidong's avatar
Chong Yidong committed
145 146
For instance, this can complete M-x lch to list-command-history.

Chong Yidong's avatar
Chong Yidong committed
147 148 149 150 151 152
*** The new variable `completions-format' determines how completions
are displayed in the *Completions* buffer.  If you set it to
`vertical', completions are sorted vertically in columns.

+++
** The default value of `blink-matching-paren-distance' is increased.
Juri Linkov's avatar
Juri Linkov committed
153

Chong Yidong's avatar
Chong Yidong committed
154 155 156 157 158 159
** M-n provides more default values in the minibuffer for commands
that read file names.  These include the file name at point (when ffap
is loaded without ffap-bindings), the file name on the current line
(in Dired buffers), and the directory names of adjacent Dired windows
(for Dired commands that operate on several directories, such as copy,
rename, or diff).
160

Chong Yidong's avatar
Chong Yidong committed
161 162 163 164
** M-r is bound to the new `move-to-window-line-top-bottom'.
This moves point to the window center, top and bottom on successive
invocations, in the same spirit as the C-l (recenter-top-bottom)
command.
165

Chong Yidong's avatar
Chong Yidong committed
166 167
** The new variable `recenter-positions' determines the default
cycling order of C-l (`recenter-top-bottom').
168

169 170 171

* Changes in Specialized Modes and Packages in Emacs 23.2

172 173
** The bookmark menu has a narrowing search via bookmark-bmenu-search.

174
** LaTeX mode now provides completion (via completion-at-point)
175

176 177
** sym-comp.el is now declared obsolete, superceded by completion-at-point.

178 179
** lucid.el and levents.el are now declared obsolete.

180 181 182
** pcomplete provides a new command `pcomplete-std-completion' which
is similar to `pcomplete' but using the standard completion UI code.

183 184
** .calc.el and .abbrev_defs obey user-emacs-directory.

185 186 187 188
** 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
189 190
** Calendar and diary

Glenn Morris's avatar
Glenn Morris committed
191
+++
Chong Yidong's avatar
Chong Yidong committed
192 193 194
*** Fancy diary display is now the default.
If you prefer the simple display, customize `diary-display-function'.

Glenn Morris's avatar
Glenn Morris committed
195
+++
Chong Yidong's avatar
Chong Yidong committed
196 197 198 199 200 201 202 203 204 205 206 207 208 209 210
*** 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.

211 212 213 214 215
** Dired

*** The new variable `dired-auto-revert-buffer' allows to revert
dired buffers automatically on revisiting.

216 217
** DocView

Juri Linkov's avatar
Juri Linkov committed
218
*** When `doc-view-continuous' is non-nil, scrolling a line
219 220
on the page edge advances to the next/previous page.

221 222 223 224 225
** gdb-mi

*** GDB User Interface migrated to GDB Machine Interface and now
supports multithread non-stop debugging and debugging of several
threads simultaneously.
Glenn Morris's avatar
Glenn Morris committed
226

227 228 229 230
** Grep

A new command `zrgrep' searches recursively in gzipped files.

231 232 233 234 235
** 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
236 237 238 239
*** 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.

240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255
** Message mode is now the default mode for composing mail.

The default for `mail-user-agent' is now message-user-agent, so the
C-x m (`compose-mail') command uses Message mode instead of Mail mode.

Message mode has been included in Emacs, as part of the Gnus package,
for several years.  It provides several features that are absent in
Mail mode, such as MIME handling.

*** If the user has not customized mail-user-agent, `compose-mail'
checks for Mail mode customizations, and issues a warning if these
customizations are found.  This alerts users who may otherwise be
unaware that their mail configuration has changed.

To disable this check, set compose-mail-user-agent-warnings to nil.

256 257 258 259 260 261 262
** nXML mode is now the default for editing XML files.

** Shell

*** ansi-color is now enabled by default.
To disable it, set ansi-color-for-comint-mode to nil.

263
+++
264
** Tramp
265

266 267 268
*** New connection methods "rsyncc", "imap" and "imaps".
On systems which support GVFS-Fuse, Tramp offers also the new
connection methods "dav", "davs", "obex" and "synce".
269

270 271
** VC and related modes

272 273 274 275 276
*** 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.

277 278 279
*** FIXME: add info about the new VC functions: vc-root-diff and
vc-root-print-log once they stabilize.

280 281 282 283 284
*** 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.
285
RCS, SCCS, CVS do not support this feature.
286

287 288 289 290 291
*** 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.

292 293 294 295
*** The log command in vc-annotate can display a single log entry
instead of redisplaying the full log.  The RCS, CVS and SCCS VC
backends do not support this.

296 297
*** When a file is not found, VC will not try to check it out of RCS anymore.

298 299
*** Diff and log operations can be used from dired buffers.

Dan Nicolaescu's avatar
Dan Nicolaescu committed
300 301
*** vc-git changes

Dan Nicolaescu's avatar
Dan Nicolaescu committed
302 303 304
**** The short log format for git makes use of the graph display, so
it's not supported on git versions earlier than 1.5.

Dan Nicolaescu's avatar
Dan Nicolaescu committed
305
**** The new variable vc-git-add-signoff can be used to add a
Dan Nicolaescu's avatar
Dan Nicolaescu committed
306 307
Signed-off-by line when committing.

308
**** Support for operating with stashes has been added to vc-dir: the stash list is
309
displayed in the *vc-dir* header, stashes can be created, removed, applied and
310 311
their content displayed.

Dan Nicolaescu's avatar
Dan Nicolaescu committed
312 313
**** vc-dir displays the stash status

314 315 316
*** vc-bzr supports operating with shelves: the shelve list is
displayed in the *vc-dir* header, shelves can be created, removed and applied.

317 318 319
*** 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
320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339
** 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.

340 341 342 343 344 345
** 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
346

347 348
*** Isearch searches in the comint/shell input history when the new variable
`comint-history-isearch' is non-nil.  New commands `comint-history-isearch-backward'
349 350
and `comint-history-isearch-backward-regexp' (bound to M-r) start Isearch
in the input history regardless of the value of `comint-history-isearch'.
351

Juri Linkov's avatar
Juri Linkov committed
352 353 354 355 356 357 358 359
*** Interactively `multi-isearch-buffers' and `multi-isearch-buffers-regexp'
read buffer names to search, one by one, ended with RET.  With a prefix
argument, they ask for a regexp, and search in buffers whose names match
the specified regexp.  Interactively `multi-isearch-files' and
`multi-isearch-files-regexp' read file names to search, one by one,
ended with RET.  With a prefix argument, they ask for a wildcard, and
search in file buffers whose file names match the specified wildcard.

Chong Yidong's avatar
Chong Yidong committed
360
+++
361 362
*** Autorevert Tail mode now works also for remote files.

363 364
+++
*** The new built-in commands `su' and `sudo' support Tramp.
365 366
That means, they change `default-directory' to the new users value,
and let commands run under that user permissions.  It works even when
367 368
`default-directory' is already remote.  Calling the external commands
is possible by `*su' or `*sudo', repectively.
Chong Yidong's avatar
Chong Yidong committed
369

370 371 372 373 374
*** When running in a new enough xterm (newer than version 242), emacs
asks xterm what the background color is and it sets up faces
accordingly for a dark background if needed (the current default is to
consider the background light).

Steve Yegge's avatar
Steve Yegge committed
375 376 377

* New Modes and Packages in Emacs 23.2

378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402
** CEDET (the Collection of Emacs Development Tools) is now in Emacs.
This is a collection of packages to aid with using Emacs as an IDE
(integrated development environment):

*** The Semantic package allows the use of parsers to intelligently
edit and navigate source code.  Parsers for C/C++, Java, Javascript,
and several other languages are included by default, and Semantic can
also interface with external tools such as GNU Global and GNU Idutils.

To enable Semantic, use the global minor mode `semantic-mode'.
See the Semantic manual for details.

*** EDE (Emacs Development Environment) is a package for managing code
projects, including features such as automatic Makefile generation.

To enable EDE, use the minor mode `global-ede-mode'.
See the EDE manual for details.

*** SRecode is a library for recoding Semantic tags back into source
code.  It is currently used by some parts of Semantic and EDE; in the
future, it may be used for code generation features.

*** The EIEIO library implements a subset of the Common Lisp Object
System (CLOS).  It is used by the other CEDET packages.

Stefan Monnier's avatar
Stefan Monnier committed
403
** mpc.el is a front end for the Music Player Daemon.  Run it with M-x mpc.
Chong Yidong's avatar
Chong Yidong committed
404

Stefan Monnier's avatar
Stefan Monnier committed
405 406
** htmlfontify.el turns a fontified Emacs buffer into an HTML page.

407
** js.el is a new major mode for JavaScript files.
408

409 410
** imap-hash.el is a new library to address IMAP mailboxes as hashtables.

411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426

* 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.

427 428 429 430 431 432 433 434 435 436 437
** In image-mode.el `image-mode-maybe' is obsolete.  Instead, you can
either use `image-mode' that displays an image file as the actual image
inititally, or `image-mode-as-text' when you want to display an image file
as text inititally.  `image-mode-as-text' is a combination of a non-image
mode from `auto-mode-alist' (or Fundamental mode) and `image-minor-mode'.
`image-minor-mode' provides `C-c C-c' key binding to toggle image display.
`image-toggle-display-text' removes image properties.
`image-toggle-display-image' adds image properties.
`image-toggle-display' toggles between `image-mode-as-text' and
`image-mode'.

438 439 440

* Lisp changes in Emacs 23.2

441 442
** make-network-socket can now also create `seqpacket' Unix sockets.

443 444 445
** New function `completion-in-region' to use the standard completion
facilities on a particular region of text.

446 447
** The 4th arg to all-completions (aka hide-spaces) is declared obsolete.

448 449 450 451 452
** 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.

Chong Yidong's avatar
Chong Yidong committed
453 454 455 456 457 458 459 460 461
** Frame parameter changes

*** You can give the `fullscreen' frame parameter the value `maximized'.
This maximizes the frame.

+++
*** The new frame parameter `sticky' makes Emacs frames sticky in
virtual desktops.

462 463 464 465 466 467
** 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.

468 469
** called-interactively-p now takes one argument and replaces interactive-p
which is now marked obsolete.
470 471
** New function set-advertised-calling-convention makes it possible
to obsolete arguments as well as make some arguments mandatory.
472
** eval-next-after-load is obsolete.
473 474
** New hook `after-load-functions' run after loading an Elisp file.

475 476 477 478 479
** 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.

480 481
** New macro with-silent-modifications to tweak text properties without
affecting the buffer's modification state.
482 483 484
** All the default-FOO variables that hold the default value of the FOO
variable, are now declared obsolete.

485 486
** 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.
487

Glenn Morris's avatar
Glenn Morris committed
488 489
** start-process-shell-command and start-file-process-shell-command
now only take a single `command' argument.
490 491 492 493 494

** 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.

495 496 497
** Hash tables have a new printed representation that is readable.
The feature `hashtable-print-readable' identifies this new
functionality.
498 499 500 501 502 503 504 505

** 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
506 507 508

** completion-annotate-function specifies how to compute annotations
for completions displayed in *Completions*.
509

510
+++
511 512
** Face aliases can now be marked as obsolete, using the macro
`define-obsolete-face-alias'.
513 514 515 516 517

---
** 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
518

519
---
Glenn Morris's avatar
Glenn Morris committed
520
** `byte-compile-warnings' has new members, `constants' and `suspicious'.
521

522 523
** `delete-directory' has an optional parameter RECURSIVE.

524 525
** New function `copy-directory', which copies a directory recursively.

526
+++
Glenn Morris's avatar
Glenn Morris committed
527 528
** New function `window-full-height-p', analogous to the full-width version.

529

Chong Yidong's avatar
Chong Yidong committed
530 531 532 533 534
* 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.
535

536

537
* Installation Changes in Emacs 23.1
538

539
** The default X toolkit is now Gtk+, rather than Lucid.
Chong Yidong's avatar
Chong Yidong committed
540 541
The configure option `--with-gtk' has been removed.  Gtk is now the
default toolkit, but you can use --with-x-toolkit=gtk if necessary.
542

Chong Yidong's avatar
Chong Yidong committed
543 544
** New font code.
Fonts are handled by new code capable of dealing with multiple font
545
backends.  This uses the freetype and fontconfig libraries.
546

Chong Yidong's avatar
Chong Yidong committed
547 548
*** 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
549

Chong Yidong's avatar
Chong Yidong committed
550 551 552 553 554 555 556 557 558
*** 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.
559

Chong Yidong's avatar
Chong Yidong committed
560
** Changes to image support
561

Chong Yidong's avatar
Chong Yidong committed
562
*** configure now checks for libgif before libungif when searching for
563
a GIF library.
564

Chong Yidong's avatar
Chong Yidong committed
565 566
*** Emacs now supports the SVG image format through librsvg2.

Jason Rumney's avatar
Jason Rumney committed
567 568
*** Emacs now supports multi-page TIFF images.

Chong Yidong's avatar
Chong Yidong committed
569
** New NeXTSTEP-based port
Glenn Morris's avatar
Glenn Morris committed
570
This provides support for GNUstep (via the GNUstep libraries) and Mac
Michael Albinus's avatar
Michael Albinus committed
571
OS X (via the Cocoa libraries).
572

Glenn Morris's avatar
Glenn Morris committed
573
Specify --with-ns to configure for this.  By default, a self-contained
574 575 576
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
577 578 579

** Mac OS X is no longer supported via Carbon.
Use the NeXTSTEP port, described above.
Glenn Morris's avatar
Glenn Morris committed
580

Chong Yidong's avatar
Chong Yidong committed
581 582
** The new configuration option "--with-dbus" enables D-Bus language
bindings for Emacs.
583

584 585
** Support for many obsolete platforms has been removed.
See the list at the end of etc/MACHINES for details.
586

Chong Yidong's avatar
Chong Yidong committed
587
*** Support for systems without alloca has been removed.
588

Chong Yidong's avatar
Chong Yidong committed
589
*** Support for Sun windows has been removed.
590

Chong Yidong's avatar
Chong Yidong committed
591
*** The `emacstool' utility has been removed.
Chong Yidong's avatar
Chong Yidong committed
592

Chong Yidong's avatar
Chong Yidong committed
593
** The following platforms will be removed in a future Emacs version:
594 595
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
596

597
*** Old GNU/Linux systems based on libc version 5.
Chong Yidong's avatar
Chong Yidong committed
598

599 600
*** Old FreeBSD, NetBSD, and OpenBSD systems based on the COFF
    executable format.
Chong Yidong's avatar
Chong Yidong committed
601 602 603

*** Solaris versions 2.6 and below.

604 605 606 607
*** Solaris on IBM RS6000 machines.

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

608 609
*** Unixware on non-x86 machines.

610 611
*** Platforms not supporting shared libraries (i.e., requiring the
NO_SHARED_LIBS compilation flag).
Chong Yidong's avatar
Chong Yidong committed
612

613 614 615 616
** 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
617 618
** The refcards are now shipped as PDF files.

Glenn Morris's avatar
Glenn Morris committed
619 620 621
** The manuals are now licensed under the GNU Free Documentation License v1.3,
or any later version.

Chong Yidong's avatar
Chong Yidong committed
622 623 624
** 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
625 626 627

* Changes in Emacs 23.1

Chong Yidong's avatar
Chong Yidong committed
628
** Improved X Window System support
629

Chong Yidong's avatar
Chong Yidong committed
630 631 632 633 634
*** 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).
635 636
There may be problems if a display exits unexpectedly and Emacs is compiled
with Gtk+, see etc/PROBLEMS.
637 638 639

You can test for the presence of this feature in your Lisp code by
testing for the `multi-tty' feature.
640 641

*** Emacs starts in the background, as a daemon, when given the
642 643 644
--daemon command line argument.  It disconnects from the terminal and
starts the server.  Clients can connect and create graphical or
terminal frames using emacsclient.
645

646
**** emacsclient starts emacs in daemon mode and connects to it when
647 648
--alternate-editor="" is used (or when the evironment variable
ALTERNATE_EDITOR is set to "") and emacsclient cannot connect to an
649 650
emacs server.

Chong Yidong's avatar
Chong Yidong committed
651
*** The new command close-display-connection closes a connection to a
652
remote display.  There are some bugs for Gtk+.  See etc/PROBLEMS.
653

Chong Yidong's avatar
Chong Yidong committed
654 655 656
*** 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
657 658
http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
for details about XEmbed.
659

Chong Yidong's avatar
Chong Yidong committed
660 661 662
*** 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
663 664
the X Window System, such as Compiz, Beryl and Compiz Fusion, on Mac
OS X, or on Windows 2000 and later versions of Windows.
665 666

The alpha parameter should be an integer between 0 (transparent) and
Chong Yidong's avatar
Chong Yidong committed
667 668
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
669
active frame and INACTIVE is the opacity of non-active frames.
670

Chong Yidong's avatar
Chong Yidong committed
671 672
The variable `frame-alpha-lower-limit' defines a lower bound for the
opacity; the default is 20.
673

Chong Yidong's avatar
Chong Yidong committed
674
** Internationalization changes
675

Chong Yidong's avatar
Chong Yidong committed
676 677
*** 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
678

Chong Yidong's avatar
Chong Yidong committed
679
The internal encoding used for buffers and strings is now
680 681 682 683
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
684

Chong Yidong's avatar
Chong Yidong committed
685 686 687
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,
688 689 690 691
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.
692

Chong Yidong's avatar
Chong Yidong committed
693
*** There are new coding systems/aliases; see M-x list-coding-systems.
694

Chong Yidong's avatar
Chong Yidong committed
695 696 697
*** 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
698

Chong Yidong's avatar
Chong Yidong committed
699 700 701
*** There are new language environments for Chinese-GBK,
Chinese-GB18030, Khmer, Bengali, Punjabi, Gujarati, Oriya, Telugu,
Sinhala, and TaiViet.
702

Chong Yidong's avatar
Chong Yidong committed
703 704
*** The minor modes unify-8859-on-encoding-mode and
unify-8859-on-decoding-mode are obsolete.
705

706 707 708
*** `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.
709

710 711 712 713 714
*** 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
715
** Emacs now supports serial port access on GNU/Linux, Unix, and
716 717 718
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.
719

Chong Yidong's avatar
Chong Yidong committed
720
** Menu Bar changes
721

Chong Yidong's avatar
Chong Yidong committed
722 723 724 725 726
*** 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.
727

Chong Yidong's avatar
Chong Yidong committed
728 729
*** The font setting chosen by "Set Default Font" is saved if the
"Save Options" item is used.
730

731 732 733
*** 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).
734

735 736 737
*** 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
738
the new word wrapping behavior (see Editing Changes, below).
739

Dan Nicolaescu's avatar
Dan Nicolaescu committed
740 741 742 743
*** 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
744
** Mode-line changes
745

Chong Yidong's avatar
Chong Yidong committed
746 747
*** The mode-line displays a `@', instead of `-', if the
default-directory for the current buffer is on a remote machine.
748

Chong Yidong's avatar
Chong Yidong committed
749 750
*** 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.
751

Chong Yidong's avatar
Chong Yidong committed
752 753
*** The `mode-line-emphasis' face is used to highlight certain
mode-line information (e.g. waiting for a VC command to finish).
754

Dan Nicolaescu's avatar
Dan Nicolaescu committed
755
*** The mode-line tooltips have been improved to provide more details.
756

Dan Nicolaescu's avatar
Dan Nicolaescu committed
757 758 759
*** 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.

760 761
** 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
762
and directories will then be sent to the Recycle Bin on Windows, and
763 764
to `trash-directory' on other systems.

Chong Yidong's avatar
Chong Yidong committed
765
** Directory-local variables can now be defined.
766 767 768
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'.
769

770 771 772 773 774 775 776
** 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.

777

778
* Startup Changes in Emacs 23.1
779

780 781 782 783 784 785
** 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.

786 787 788 789
** New user option `initial-buffer-choice' specifies what to display
after starting Emacs: startup screen, *scratch* buffer, visiting a
file or directory.

790 791 792 793
** 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.
794 795

** The abbrev file is no longer read at startup in batch mode.
796 797 798 799 800 801

** 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.)
802

803
* Incompatible Editing Changes in Emacs 23.1
Kim F. Storm's avatar
Kim F. Storm committed
804

805 806 807
** In Dired, `dired-flag-garbage-files' is rebound from `&' to `%&'
on the regexp command prefix map.

808 809 810 811
** 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.

812 813 814 815
** 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
816 817
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'.
818

Juri Linkov's avatar
Juri Linkov committed
819 820 821 822 823 824 825
** 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'.

826 827 828
** 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.
829

Reiner Steib's avatar
Reiner Steib committed
830
** The following input methods were removed in Emacs 22.2, but this was
Juanma Barranquero's avatar
Juanma Barranquero committed
831
not advertised: danish-alt-postfix, esperanto-alt-postfix,
Reiner Steib's avatar
Reiner Steib committed
832 833 834 835
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.
836

Richard M. Stallman's avatar
Richard M. Stallman committed
837

838
* Editing Changes in Emacs 23.1
Richard M. Stallman's avatar
Richard M. Stallman committed
839

840 841 842
** 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
843 844
behavior (i.e., motion by logical lines based on buffer contents
alone).
845

Chong Yidong's avatar
Chong Yidong committed
846
** C-x C-c now invokes `save-buffers-kill-terminal', and C-z now
847
invokes `suspend-frame'.  These changes are for compatibility with the
Chong Yidong's avatar
Chong Yidong committed
848
new multi-tty support (see `Improved X Window System support' above).
849

Chong Yidong's avatar
Chong Yidong committed
850
** Mark changes
851

852
*** Transient Mark mode is now on by default.
853

854
*** mark-even-if-inactive now defaults to t
855

856 857
*** When Transient Mark mode is on, C-SPC C-SPC pushes a mark without
activating it.
858

859 860
*** When Transient Mark mode is on, M-q now fills the region if the
region is active.  Otherwise, it fills the current paragraph.
861

862 863
*** 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
864
word at point.
865

866 867
*** When Transient Mark mode is on, TAB now indents the region if the
region is active.
868 869 870 871

*** The variable `use-empty-active-region' controls whether an empty
active region in Transient Mark mode should make commands operate on
that empty region.
872 873

** Temporarily active regions
874

875 876 877 878
*** 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.
879

880 881 882 883 884 885 886
*** 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).

887
** Minibuffer and completion changes
888

889 890 891 892 893 894 895 896 897 898 899 900
*** 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.
901

902 903 904 905 906 907 908 909 910 911 912 913
*** 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.
914

915 916 917 918 919 920
*** 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.
921

Chong Yidong's avatar
Chong Yidong committed
922
*** Minibuffer input of shell commands now comes with completion.
923

Chong Yidong's avatar
Chong Yidong committed
924 925
*** In the `C-x d' (Dired) prompt, typing M-n gives the visited file
name of the current buffer.
926

Chong Yidong's avatar
Chong Yidong committed
927 928 929 930 931
*** 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.
932 933 934

*** 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
935 936
region in transient-mark-mode, the word under the cursor, the last Isearch
regexp, the last Isearch string and the last replacement regexp.
937

938 939 940 941 942
*** 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).
943

Juri Linkov's avatar
Juri Linkov committed
944 945 946
*** 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
947 948 949 950
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.
951

952 953
*** The variable read-file-name-completion-ignore-case overrides
completion-ignore-case for file name completion.
954

955 956
*** The variable read-buffer-completion-ignore-case overrides
completion-ignore-case for buffer name completion.
957

958 959
*** The new command `minibuffer-force-complete' chooses one of the
possible completions, rather than stopping at the common prefix.
960

961 962 963
*** 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'.
964

965
** Face changes
966

967 968
*** 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
969
via face remapping (see Lisp changes, below).
970

971 972 973
*** 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'.
974 975 976 977 978 979 980
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'.

981 982 983
*** 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
984

Chong Yidong's avatar
Chong Yidong committed
985
** Primary selection changes
986

987 988
*** You can disable kill ring commands from accessing the primary
selection by setting `x-select-enable-primary' to nil.
989

990 991 992 993 994 995 996 997
** 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
998

999
** Window management changes
1000

1001 1002
*** truncate-partial-width-windows now accepts integer values, which
specify a minimum window width for partial-width windows, below which
1003
lines are truncated.  The default has been changed to 50.
1004 1005 1006

*** The new command balance-windows-area balances windows both
vertically and horizontally.
1007

Martin Rudalics's avatar
Martin Rudalics committed
1008 1009