NEWS 95.1 KB
Newer Older
1
GNU Emacs NEWS -- history of user-visible changes.
2

3
Copyright (C) 2007, 2008, 2009, 2010 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 bug-gnu-emacs@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
* Installation Changes in Emacs 23.2

** New configure options for Emacs developers
These are not new features; only the configure flags are new.
29
---
30 31
*** --enable-profiling builds Emacs with profiling enabled.
This might not work on all platforms.
32
---
33 34
*** --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.

39
** Emacs compiles with Gconf support, if it is detected.
Chong Yidong's avatar
Chong Yidong committed
40 41
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.
49
+++
Chong Yidong's avatar
Chong Yidong committed
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

58
+++
Chong Yidong's avatar
Chong Yidong committed
59
** The maximum size of buffers (and the largest fixnum) is doubled.
60 61
On typical 32bit systems, buffers can now be up to 512MB.

62
---
Chong Yidong's avatar
Chong Yidong committed
63 64
** The default value of `trash-directory' is now nil.
This means that `move-file-to-trash' trashes files according to
65 66 67 68
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.)

69
+++
70
** The pointer now becomes invisible when typing.
Chong Yidong's avatar
Chong Yidong committed
71
Customize `make-pointer-invisible' to disable this feature.
72

Chong Yidong's avatar
Chong Yidong committed
73
** Font changes
Chong Yidong's avatar
Chong Yidong committed
74
+++
Chong Yidong's avatar
Chong Yidong committed
75 76 77 78 79 80
*** 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).
Chong Yidong's avatar
Chong Yidong committed
81
---
Chong Yidong's avatar
Chong Yidong committed
82 83 84
*** 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.
85

86
+++
Chong Yidong's avatar
Chong Yidong committed
87 88 89 90
** 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'.
91

92
** File-local variable changes
93
+++
94 95 96 97 98 99 100 101 102 103 104 105 106
*** 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',
107 108 109
`copy-dir-locals-to-file-locals-prop-line' and
`copy-file-locals-to-dir-locals'.

Chong Yidong's avatar
Chong Yidong committed
110
** Internationalization changes
111
+++
Chong Yidong's avatar
Chong Yidong committed
112 113 114 115 116
*** 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.
117
---
Chong Yidong's avatar
Chong Yidong committed
118 119 120 121
*** New coding system `utf-8-hfs'.
This is suitable for default-file-name-coding-system on Mac OS X; see
international/ucs-normalize.el.

122
---
Chong Yidong's avatar
Chong Yidong committed
123 124
** Function arguments in *Help* buffers are now shown in upper-case.
Customize `help-downcase-arguments' to t to show them in lower-case.
125

Glenn Morris's avatar
Glenn Morris committed
126 127 128

* Editing Changes in Emacs 23.2

Chong Yidong's avatar
Chong Yidong committed
129
** Kill-ring and selection changes
Chong Yidong's avatar
Chong Yidong committed
130 131 132 133 134
+++
*** 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.
135
+++
Chong Yidong's avatar
Chong Yidong committed
136 137 138
*** 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.
139
+++
Chong Yidong's avatar
Chong Yidong committed
140 141
*** 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
142

Chong Yidong's avatar
Chong Yidong committed
143
** Completion changes
Glenn Morris's avatar
Glenn Morris committed
144

145
*** The new command `completion-at-point' provides mode-sensitive completion.
146
+++
147
*** tab-always-indent set to `complete' lets TAB do completion as well.
148
+++
Chong Yidong's avatar
Chong Yidong committed
149
*** The new completion-style `initials' is available.
Chong Yidong's avatar
Chong Yidong committed
150
For instance, this can complete M-x lch to list-command-history.
151
---
Chong Yidong's avatar
Chong Yidong committed
152 153 154 155 156 157
*** 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
158

159
---
Chong Yidong's avatar
Chong Yidong committed
160 161 162 163 164 165
** 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).
166

167
+++
Chong Yidong's avatar
Chong Yidong committed
168 169 170 171
** 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.
172

173
+++
Chong Yidong's avatar
Chong Yidong committed
174 175
** The new variable `recenter-positions' determines the default
cycling order of C-l (`recenter-top-bottom').
176

177 178 179 180
+++
** The abbrevs file is now a file named abbrev_defs in
user-emacs-directory; but the old location, ~/.abbrev_defs, is used if
that file exists.
181 182 183

* Changes in Specialized Modes and Packages in Emacs 23.2

184 185
** The bookmark menu has a narrowing search via bookmark-bmenu-search.

Juanma Barranquero's avatar
Juanma Barranquero committed
186
** LaTeX mode now provides completion (via completion-at-point).
187

188
---
189 190
** sym-comp.el is now declared obsolete, superceded by completion-at-point.

191 192
** lucid.el and levents.el are now declared obsolete.

193 194 195
** pcomplete provides a new command `pcomplete-std-completion' which
is similar to `pcomplete' but using the standard completion UI code.

196 197 198 199 200 201 202 203
** Calc
+++
*** The Calc settings file is now a file named calc.el in
user-emacs-directory; but the old location, ~/.calc.el, is used if
that file exists.
---
*** 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.
204

Chong Yidong's avatar
Chong Yidong committed
205
** Calendar and diary
Glenn Morris's avatar
Glenn Morris committed
206
+++
Chong Yidong's avatar
Chong Yidong committed
207 208
*** Fancy diary display is now the default.
If you prefer the simple display, customize `diary-display-function'.
Glenn Morris's avatar
Glenn Morris committed
209
+++
Chong Yidong's avatar
Chong Yidong committed
210 211 212 213 214 215 216 217 218 219 220 221 222 223
*** 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.

224
** Dired
225 226 227
+++
*** The new variable `dired-auto-revert-buffer', if non-nil, causes
Dired buffers to be reverted automatically on revisiting them.
228

229
** DocView
230
+++
Juri Linkov's avatar
Juri Linkov committed
231
*** When `doc-view-continuous' is non-nil, scrolling a line
232 233
on the page edge advances to the next/previous page.

234
** GDB-UI
235

Juanma Barranquero's avatar
Juanma Barranquero committed
236 237 238
*** Toolbar functionality for reverse debugging.  Display of STL
collections as watch expressions.  These features require GDB 7.0
or later.
Glenn Morris's avatar
Glenn Morris committed
239

240
** Grep
241 242
+++
*** A new command `zrgrep' searches recursively in gzipped files.
243

244 245 246 247 248
** 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
249 250 251 252
*** 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.

253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268
** 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.

269 270 271 272 273
** The default value of mail-interactive is t, since Emacs 23.1.
(This was not announced at the time.)  It means that when sending mail,
Emacs will wait for the process sending mail to return.  If you
experience delays when sending mail, you may wish to set this to nil.

274
+++
275 276
** nXML mode is now the default for editing XML files.

277
** Shell (and other comint modes)
278
+++
279 280 281 282 283 284
*** M-s is no longer bound to `comint-next-matching-input'.
+++
*** M-r is now bound to `comint-history-isearch-backward-regexp'.
This starts an incremental search of the comint/shell input history.
+++
*** ansi-color is now enabled by default in Shell mode.
285 286
To disable it, set ansi-color-for-comint-mode to nil.

287
+++
288
** Tramp
289

290 291 292
*** 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".
293

294
** VC and related modes
295
+++
296 297 298 299
*** 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.
300 301 302 303
+++
*** New command `vc-root-print-log', bound to `C-x v L'.
This displays a `*vc-change-log*' buffer showing the history of the
version-controlled directory tree as a whole.
304 305 306 307
+++
*** New command `vc-root-diff', bound to `C-x v D'.
This is similar to `vc-diff', but compares the entire directory tree
of the current VC directory with its working revision.
308 309 310 311 312 313 314
+++
*** `C-x v l' and `C-x v L' do not show the full log by default.
The number of entries shown can be chosen interactively with a prefix
argument, or by customizing vc-log-show-limit.  The `*vc-change-log*'
buffer now contains buttons at the end of the buffer, which can be
used to increase the number of entries shown.  RCS, SCCS, and CVS do
not support this feature.
315
---
316 317 318 319 320
*** 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.

321 322 323 324
*** 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.

325 326
*** When a file is not found, VC will not try to check it out of RCS anymore.

327
*** Diff and log operations can be used from Dired buffers.
328

Dan Nicolaescu's avatar
Dan Nicolaescu committed
329 330
*** vc-git changes

Dan Nicolaescu's avatar
Dan Nicolaescu committed
331 332 333
**** The short log format for git makes use of the graph display, so
it's not supported on git versions earlier than 1.5.

334
**** Support for operating with stashes has been added to vc-dir: the stash list is
335
displayed in the *vc-dir* header, stashes can be created, removed, applied and
336 337
their content displayed.

Dan Nicolaescu's avatar
Dan Nicolaescu committed
338 339
**** vc-dir displays the stash status

340 341
**** vc-dir requires at least git-1.5.5.

342 343 344
*** vc-bzr supports operating with shelves: the shelve list is
displayed in the *vc-dir* header, shelves can be created, removed and applied.

345 346 347
*** 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
348 349 350 351 352 353 354 355 356 357 358 359 360 361 362
** 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.

363
** Miscellaneous
364
+++
365 366 367 368
*** 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*'.
369
+++
Juri Linkov's avatar
Juri Linkov committed
370 371 372 373 374 375 376
*** 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
377
+++
378
*** Autorevert Tail mode now works also for remote files.
379 380
+++
*** The new built-in commands `su' and `sudo' support Tramp.
381 382
That means, they change `default-directory' to the new users value,
and let commands run under that user permissions.  It works even when
383 384
`default-directory' is already remote.  Calling the external commands
is possible by `*su' or `*sudo', repectively.
385
---
386
*** When running in a new enough xterm (newer than version 242), Emacs
387 388 389 390
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
391 392 393

* New Modes and Packages in Emacs 23.2

394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418
** 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
419
** mpc.el is a front end for the Music Player Daemon.  Run it with M-x mpc.
Chong Yidong's avatar
Chong Yidong committed
420

Stefan Monnier's avatar
Stefan Monnier committed
421 422
** htmlfontify.el turns a fontified Emacs buffer into an HTML page.

423
+++
424
** js.el is a new major mode for JavaScript files.
425

426 427
** imap-hash.el is a new library to address IMAP mailboxes as hashtables.

428 429 430

* Incompatible Lisp Changes in Emacs 23.2

431 432 433 434
+++
** The Lisp reader turns integers that are too large/small into floats.
For instance, on machines where `536870911' is the largest integer,
reading `536870912' gives the floating-point object `536870912.0'.
Chong Yidong's avatar
Chong Yidong committed
435 436 437

This change only concerns the Lisp reader; it does not affect how
actual integer objects overflow.
438

439
---
440 441 442 443 444 445 446 447 448 449 450 451 452
** 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.

453 454 455 456 457 458 459 460 461 462 463
** 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'.

464 465 466

* Lisp changes in Emacs 23.2

467 468
** All the default-FOO variables that hold the default value of the FOO
variable, are now declared obsolete.
469

470 471
** 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.
472

Chong Yidong's avatar
Chong Yidong committed
473
** Frame parameter changes
474
+++
Chong Yidong's avatar
Chong Yidong committed
475 476 477 478 479 480
*** 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.

481 482 483
** Completion changes

*** completion-base-size is obsoleted by completion-base-position.
484 485 486 487 488
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.

489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509
*** New function `completion-in-region' to use the standard completion
facilities on a particular region of text.
+++
*** The 4th arg to all-completions (aka hide-spaces) is declared obsolete.

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

** Minibuffer changes
---
*** 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.

** Changes to file-manipulation functions
+++
*** `delete-directory' has an optional parameter RECURSIVE.
+++
*** New function `copy-directory', which copies a directory recursively.

510 511
** called-interactively-p now takes one argument and replaces interactive-p
which is now marked obsolete.
512

513 514
** New function set-advertised-calling-convention makes it possible
to obsolete arguments as well as make some arguments mandatory.
515

516 517 518 519 520
** 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.

521
** Network and process changes
522
+++
523
*** start-process-shell-command and start-file-process-shell-command
Glenn Morris's avatar
Glenn Morris committed
524
now only take a single `command' argument.
525 526 527 528 529 530
+++
*** The new variable `process-file-side-effects' should be set to nil
if a `process-file' call does not change a remote file.  This allows
file name handlers such as Tramp to optimizations.
+++
*** make-network-process can now also create `seqpacket' Unix sockets.
531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548

** Loading changes

*** eval-next-after-load is obsolete.

*** New hook `after-load-functions' run after loading an Elisp file.

** Byte compilation changes
---
*** 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.
---
*** `byte-compile-warnings' has new members, `constants' and `suspicious'.

** New macro with-silent-modifications to tweak text properties without
affecting the buffer's modification state.

549
+++
550 551 552
** Hash tables have a new printed representation that is readable.
The feature `hashtable-print-readable' identifies this new
functionality.
553

554
** New functions for performing Unicode normalization:
555 556 557 558 559 560
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
561

562
+++
563 564
** Face aliases can now be marked as obsolete, using the macro
`define-obsolete-face-alias'.
565

566
+++
Glenn Morris's avatar
Glenn Morris committed
567 568
** New function `window-full-height-p', analogous to the full-width version.

569

Chong Yidong's avatar
Chong Yidong committed
570 571 572 573 574
* 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.
575

576

577
* Installation Changes in Emacs 23.1
578

579
** The default X toolkit is now Gtk+, rather than Lucid.
Chong Yidong's avatar
Chong Yidong committed
580 581
The configure option `--with-gtk' has been removed.  Gtk is now the
default toolkit, but you can use --with-x-toolkit=gtk if necessary.
582

Chong Yidong's avatar
Chong Yidong committed
583 584
** New font code.
Fonts are handled by new code capable of dealing with multiple font
585
backends.  This uses the freetype and fontconfig libraries.
586

Chong Yidong's avatar
Chong Yidong committed
587 588
*** 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
589

Chong Yidong's avatar
Chong Yidong committed
590 591 592 593 594 595 596 597 598
*** 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.
599

Chong Yidong's avatar
Chong Yidong committed
600
** Changes to image support
601

Chong Yidong's avatar
Chong Yidong committed
602
*** configure now checks for libgif before libungif when searching for
603
a GIF library.
604

Chong Yidong's avatar
Chong Yidong committed
605 606
*** Emacs now supports the SVG image format through librsvg2.

Jason Rumney's avatar
Jason Rumney committed
607 608
*** Emacs now supports multi-page TIFF images.

Juanma Barranquero's avatar
Juanma Barranquero committed
609
** New NeXTSTEP-based port.
Glenn Morris's avatar
Glenn Morris committed
610
This provides support for GNUstep (via the GNUstep libraries) and Mac
Michael Albinus's avatar
Michael Albinus committed
611
OS X (via the Cocoa libraries).
612

Glenn Morris's avatar
Glenn Morris committed
613
Specify --with-ns to configure for this.  By default, a self-contained
614 615 616
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
617 618 619

** Mac OS X is no longer supported via Carbon.
Use the NeXTSTEP port, described above.
Glenn Morris's avatar
Glenn Morris committed
620

Chong Yidong's avatar
Chong Yidong committed
621 622
** The new configuration option "--with-dbus" enables D-Bus language
bindings for Emacs.
623

624 625
** Support for many obsolete platforms has been removed.
See the list at the end of etc/MACHINES for details.
626

Chong Yidong's avatar
Chong Yidong committed
627
*** Support for systems without alloca has been removed.
628

Chong Yidong's avatar
Chong Yidong committed
629
*** Support for Sun windows has been removed.
630

Chong Yidong's avatar
Chong Yidong committed
631
*** The `emacstool' utility has been removed.
Chong Yidong's avatar
Chong Yidong committed
632

Chong Yidong's avatar
Chong Yidong committed
633
** The following platforms will be removed in a future Emacs version:
634 635
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
636

637
*** Old GNU/Linux systems based on libc version 5.
Chong Yidong's avatar
Chong Yidong committed
638

639
*** Old FreeBSD, NetBSD, and OpenBSD systems based on the COFF
Juanma Barranquero's avatar
Juanma Barranquero committed
640
executable format.
Chong Yidong's avatar
Chong Yidong committed
641 642 643

*** Solaris versions 2.6 and below.

644 645 646 647
*** Solaris on IBM RS6000 machines.

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

648 649
*** Unixware on non-x86 machines.

650 651
*** Platforms not supporting shared libraries (i.e., requiring the
NO_SHARED_LIBS compilation flag).
Chong Yidong's avatar
Chong Yidong committed
652

653 654 655 656
** 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
657 658
** The refcards are now shipped as PDF files.

Glenn Morris's avatar
Glenn Morris committed
659 660 661
** The manuals are now licensed under the GNU Free Documentation License v1.3,
or any later version.

Chong Yidong's avatar
Chong Yidong committed
662 663 664
** 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
665 666 667

* Changes in Emacs 23.1

Chong Yidong's avatar
Chong Yidong committed
668
** Improved X Window System support
669

Chong Yidong's avatar
Chong Yidong committed
670 671 672 673 674
*** 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).
675 676
There may be problems if a display exits unexpectedly and Emacs is compiled
with Gtk+, see etc/PROBLEMS.
677 678 679

You can test for the presence of this feature in your Lisp code by
testing for the `multi-tty' feature.
680 681

*** Emacs starts in the background, as a daemon, when given the
682 683 684
--daemon command line argument.  It disconnects from the terminal and
starts the server.  Clients can connect and create graphical or
terminal frames using emacsclient.
685

686
**** emacsclient starts emacs in daemon mode and connects to it when
687 688
--alternate-editor="" is used (or when the evironment variable
ALTERNATE_EDITOR is set to "") and emacsclient cannot connect to an
689 690
emacs server.

Chong Yidong's avatar
Chong Yidong committed
691
*** The new command close-display-connection closes a connection to a
692
remote display.  There are some bugs for Gtk+.  See etc/PROBLEMS.
693

Chong Yidong's avatar
Chong Yidong committed
694 695 696
*** 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
697 698
http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
for details about XEmbed.
699

Chong Yidong's avatar
Chong Yidong committed
700 701 702
*** 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
703 704
the X Window System, such as Compiz, Beryl and Compiz Fusion, on Mac
OS X, or on Windows 2000 and later versions of Windows.
705 706

The alpha parameter should be an integer between 0 (transparent) and
Chong Yidong's avatar
Chong Yidong committed
707 708
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
709
active frame and INACTIVE is the opacity of non-active frames.
710

Chong Yidong's avatar
Chong Yidong committed
711 712
The variable `frame-alpha-lower-limit' defines a lower bound for the
opacity; the default is 20.
713

Chong Yidong's avatar
Chong Yidong committed
714
** Internationalization changes
715

Chong Yidong's avatar
Chong Yidong committed
716 717
*** 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
718

Chong Yidong's avatar
Chong Yidong committed
719
The internal encoding used for buffers and strings is now
720 721 722 723
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
724

Chong Yidong's avatar
Chong Yidong committed
725 726 727
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,
728 729 730 731
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.
732

Chong Yidong's avatar
Chong Yidong committed
733
*** There are new coding systems/aliases; see M-x list-coding-systems.
734

Chong Yidong's avatar
Chong Yidong committed
735 736 737
*** 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
738

Chong Yidong's avatar
Chong Yidong committed
739 740 741
*** There are new language environments for Chinese-GBK,
Chinese-GB18030, Khmer, Bengali, Punjabi, Gujarati, Oriya, Telugu,
Sinhala, and TaiViet.
742

Chong Yidong's avatar
Chong Yidong committed
743 744
*** The minor modes unify-8859-on-encoding-mode and
unify-8859-on-decoding-mode are obsolete.
745

746 747 748
*** `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.
749

750 751 752 753 754
*** 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
755
** Emacs now supports serial port access on GNU/Linux, Unix, and
756 757 758
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.
759

Chong Yidong's avatar
Chong Yidong committed
760
** Menu Bar changes
761

Chong Yidong's avatar
Chong Yidong committed
762 763 764 765 766
*** 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.
767

Chong Yidong's avatar
Chong Yidong committed
768 769
*** The font setting chosen by "Set Default Font" is saved if the
"Save Options" item is used.
770

771 772 773
*** 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).
774

775 776 777
*** 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
778
the new word wrapping behavior (see Editing Changes, below).
779

Dan Nicolaescu's avatar
Dan Nicolaescu committed
780 781 782 783
*** 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
784
** Mode-line changes
785

Chong Yidong's avatar
Chong Yidong committed
786 787
*** The mode-line displays a `@', instead of `-', if the
default-directory for the current buffer is on a remote machine.
788

Chong Yidong's avatar
Chong Yidong committed
789 790
*** 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.
791

Chong Yidong's avatar
Chong Yidong committed
792 793
*** The `mode-line-emphasis' face is used to highlight certain
mode-line information (e.g. waiting for a VC command to finish).
794

Dan Nicolaescu's avatar
Dan Nicolaescu committed
795
*** The mode-line tooltips have been improved to provide more details.
796

Dan Nicolaescu's avatar
Dan Nicolaescu committed
797 798 799
*** 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.

800 801
** 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
802
and directories will then be sent to the Recycle Bin on Windows, and
803 804
to `trash-directory' on other systems.

Chong Yidong's avatar
Chong Yidong committed
805
** Directory-local variables can now be defined.
806 807 808
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'.
809

810 811 812 813 814 815 816
** 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.

817

818
* Startup Changes in Emacs 23.1
819

820 821 822 823 824 825
** 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.

826 827 828 829
** New user option `initial-buffer-choice' specifies what to display
after starting Emacs: startup screen, *scratch* buffer, visiting a
file or directory.

830 831 832 833
** 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.
834 835

** The abbrev file is no longer read at startup in batch mode.
836 837 838 839 840 841

** 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.)
842

843
* Incompatible Editing Changes in Emacs 23.1
Kim F. Storm's avatar
Kim F. Storm committed
844

845 846 847
** In Dired, `dired-flag-garbage-files' is rebound from `&' to `%&'
on the regexp command prefix map.

848 849 850 851
** 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.

852 853 854 855
** 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
856 857
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'.
858

Juri Linkov's avatar
Juri Linkov committed
859 860 861 862 863 864 865
** 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'.

866 867 868
** 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.
869

Reiner Steib's avatar
Reiner Steib committed
870
** The following input methods were removed in Emacs 22.2, but this was
Juanma Barranquero's avatar
Juanma Barranquero committed
871
not advertised: danish-alt-postfix, esperanto-alt-postfix,
Reiner Steib's avatar
Reiner Steib committed
872 873 874 875
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.
876

Richard M. Stallman's avatar
Richard M. Stallman committed
877

878
* Editing Changes in Emacs 23.1
Richard M. Stallman's avatar
Richard M. Stallman committed
879

880 881 882
** 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
883 884
behavior (i.e., motion by logical lines based on buffer contents
alone).
885

Chong Yidong's avatar
Chong Yidong committed
886
** C-x C-c now invokes `save-buffers-kill-terminal', and C-z now
887
invokes `suspend-frame'.  These changes are for compatibility with the
Chong Yidong's avatar
Chong Yidong committed
888
new multi-tty support (see `Improved X Window System support' above).
889

Chong Yidong's avatar
Chong Yidong committed
890
** Mark changes
891

892
*** Transient Mark mode is now on by default.
893

894
*** mark-even-if-inactive now defaults to t
895

896 897
*** When Transient Mark mode is on, C-SPC C-SPC pushes a mark without
activating it.
898

899 900
*** When Transient Mark mode is on, M-q now fills the region if the
region is active.  Otherwise, it fills the current paragraph.
901

902 903
*** 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
904
word at point.
905

906 907
*** When Transient Mark mode is on, TAB now indents the region if the
region is active.
908 909 910 911

*** The variable `use-empty-active-region' controls whether an empty
active region in Transient Mark mode should make commands operate on
that empty region.
912 913

** Temporarily active regions
914

915 916 917 918
*** 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.
919

920 921 922 923 924 925 926
*** 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).

927
** Minibuffer and completion changes
928

929 930 931 932 933 934 935 936 937 938 939 940
*** 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.
941

942 943 944 945 946 947 948 949 950 951 952 953
*** 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.
954

955 956 957 958 959 960
*** 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.
961

Chong Yidong's avatar
Chong Yidong committed
962
*** Minibuffer input of shell commands now comes with completion.
963

Chong Yidong's avatar
Chong Yidong committed
964 965
*** In the `C-x d' (Dired) prompt, typing M-n gives the visited file
name of the current buffer.
966

Chong Yidong's avatar