NEWS 70.3 KB
Newer Older
1
GNU Emacs NEWS -- history of user-visible changes.
2

Glenn Morris's avatar
Glenn Morris committed
3
Copyright (C) 2010-2012 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 24.
10

11 12
See files NEWS.23, 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

Glenn Morris's avatar
Glenn Morris committed
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.


* Installation Changes in Emacs 24.2
25 26 27 28 29

** New configure option '--enable-gcc-warnings', intended for developers.
If building with GCC, this enables compile-time checks that warn about
possibly-questionable C code.  On a recent GNU system there should be
no warnings; on older and on non-GNU systems the generated warnings
Paul Eggert's avatar
Paul Eggert committed
30
may be useful.
31

32 33 34
** The configure option '--disable-maintainer-mode' has been removed,
as it was confusingly-named and rarely useful.

35 36 37
---
** Emacs uses libtinfo in preference to libncurses, if available.

38 39 40 41 42
---
** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
/usr/pkg/lib to the linker search path.  You must add them yourself if
you want them.

43 44 45 46
---
** On Mac OS X, configure no longer automatically adds the Fink /sw
directories to the search path.  You must add them yourself if you want them.

Glenn Morris's avatar
Glenn Morris committed
47 48 49 50 51
---
** The standalone scripts rcs-checkin and vcdiff have been removed
(from the bin and libexec directories, respectively).  The former is
no longer relevant, the latter is replaced by lisp (in vc-sccs.el).

Glenn Morris's avatar
Glenn Morris committed
52 53

* Startup Changes in Emacs 24.2
54 55 56 57 58

** Emacs no longer searches for `leim-list.el' files beneath the standard
lisp/ directory.  There should not be any there anyway.  If you have
been adding them there, put them somewhere else, eg site-lisp.

Glenn Morris's avatar
Glenn Morris committed
59 60 61

* Changes in Emacs 24.2

62 63 64
** New functions `system-users', `system-groups' return lists of the user
name, group names known to the system (where possible).

Glenn Morris's avatar
Glenn Morris committed
65 66 67
** If your Emacs was built from a bzr checkout, the new variable
`emacs-bzr-version' contains information about which bzr revision was used.

68 69 70
** ImageMagick support, if available, is automatically enabled.
It is no longer necessary to call `imagemagick-register-types'
explicitly to install ImageMagick image types; that function is called
71 72
automatically at startup, or when customizing a relevant imagemagick-
option.
73 74

*** Setting `imagemagick-types-inhibit' to t now disables the use of
75 76
ImageMagick to view images.  You must call imagemagick-register-types
afterwards if you do not use customize to change this.
77

78
*** The new variable `imagemagick-enabled-types' also affects which
79 80 81
ImageMagick types are treated as images.  The function
`imagemagick-filter-types' returns the list of types that will be
treated as images.
82

83 84 85
*** Images displayed via ImageMagick now support transparency and the
:background image spec property.

86 87 88 89
** String values for `initial-buffer-choice' also apply to emacsclient
frames, if emacsclient is only told to open a new frame without
specifying any file to visit or expression to evaluate.

90 91 92 93
+++
** You can prevent the creation of lock files by setting `create-lockfiles'
to nil.  Use with caution, and only if you really need to.

94
+++
95
** Using "unibyte: t" in Lisp source files is obsolete.
Glenn Morris's avatar
Glenn Morris committed
96
Use "coding: raw-text" instead.
97

98 99 100 101 102 103
** Mode line changes

*** New option `mode-line-default-help-echo' specifies the help text
(shown in a tooltip or in the echo area) for any part of the mode line
that does not have its own specialized help text.

104 105 106
*** You can now click mouse-3 in the coding system indicator to
invokes `set-buffer-file-coding-system'.

107 108 109 110
+++
** Setting `enable-remote-dir-locals' to non-nil allows directory
local variables on remote hosts.

Glenn Morris's avatar
Glenn Morris committed
111 112

* Editing Changes in Emacs 24.2
113

114 115 116 117 118 119
** Search changes

*** Global `M-s _' starts a symbol (identifier) incremental search,
and `M-s _' in Isearch toggles symbol search mode.
`M-s c' in Isearch toggles search case-sensitivity.

120 121 122
** M-x move-to-column, if called interactively with no prefix arg, now
prompts for a column number.

123 124 125
** `mouse-avoidance-banish-position' can now be used to customize
`mouse-avoidance-mode' further.

126 127 128
** `C-M-f' and `C-M-b' will now move to the path name separator
character when doing minibuffer filename prompts.

129 130
** `goto-char' is now bound to `M-g c'.

131 132
** New input method `vietnamese-vni'.

Glenn Morris's avatar
Glenn Morris committed
133 134

* Changes in Specialized Modes and Packages in Emacs 24.2
135

136 137 138 139 140 141 142 143 144 145 146 147
** CL's main entry is now (require 'cl-lib).
`cl-lib' is like the old `cl' except that it uses the namespace cleanly,
i.e. all its definitions have the "cl-" prefix.

If `cl' provided a feature under the name `foo', then `cl-lib' provides it
under the name `cl-foo' instead, with the exceptions of the few definitions
that had to use `foo*' to avoid conflicts with pre-existing Elisp entities,
which have not been renamed to `cl-foo*' but just `cl-foo'.

The old `cl' is now deprecated and is nothing more than a bunch of aliases that
provide the old non-prefixed names.

148 149 150 151 152 153
** VHDL-mode
- Support for ghdl (free vhdl compiler).  Now default.
- Add/update support for VHDL-AMS packages.
- Update to VHDL'02 standard.
- Accept \r and \f as whitespace.

154 155 156 157 158 159 160 161 162 163 164
** Diff mode

Faces for changes now use the same diff color scheme as in modern VCSes
where deletions are displayed in red (new faces `diff-refine-removed'
and `smerge-refined-removed' and new definition of `diff-removed'),
insertions in green (new faces `diff-refine-added' and
`smerge-refined-added' and new definition of `diff-added').
The variable `diff-use-changed-face' defines whether to use
the face `diff-changed', or `diff-removed' and `diff-added'
to highlight changes in context diffs.

Juri Linkov's avatar
Juri Linkov committed
165 166 167
** Ediff now uses the same color scheme as Diff mode
on high color displays.

168 169 170 171 172
** `sh-script'
*** Pairing of parens/quotes uses electric-pair-mode instead of skeleton-pair.
*** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
*** `sh-use-smie' lets you choose a new indentation and navigation code.

173 174
** reStructuredText mode

175 176
*** Rebind nearly all keys making room for more keys and complying
better to usage in other modes.  Describe bindings with C-c C-h.
177

178 179
*** Major revision of indentation working very similar to other
modes.  TAB is your friend.
180

181 182
*** Major revision of filling working fine with most of
reStructuredText syntax.  Support auto-filling.
183 184 185

*** Major revision of comment handling.

186
*** Major revision of fontification working with `jit-lock-mode'.
187

188 189
*** Cover reStructuredText syntax more closely.  Improve
the experience for Sphinx users.
190

191
*** `rst-insert-list' inserts new list or continues existing lists.
192

193
*** Extend correct and improve customization.
194 195 196

*** Negative prefix argument always works for `rst-adjust'.

197
*** Reset window configuration after displaying TOC.
198

199
*** Package version in `rst-version'.
200

201 202
** New `derived-mode' filter for Ibuffer, bound to `/ M'.
`/ m' is now bound to filter by used-mode, which used to be bound to `/ M'.
203

Chong Yidong's avatar
Chong Yidong committed
204 205 206 207 208 209 210 211 212
** Apropos

*** The faces used by Apropos are now directly customizable.
These faces are named `apropos-symbol', `apropos-keybinding', and so on;
see the `apropos' Custom group for details.

**** The old options whose values specified faces to use were removed
(i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).

213 214 215 216 217 218
** Buffer Menu
This package has been rewritten to use Tabulated List mode.

*** Option `Buffer-menu-buffer+size-width' is now obsolete.
Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.

219 220
** Calendar

221 222
*** The calendars produced by cal-html include holidays.
Customize cal-html-holidays to change this.
223

224 225 226
** Customize

*** `custom-reset-button-menu' now defaults to t.
227

228 229 230 231
*** Non-option variables are never matched in `customize-apropos' and
`customize-apropos-options' (i.e. the prefix argument does nothing for
these commands now).

232
** erc will look up server/channel names via auth-source and use the
233
channel keys found, if any.
234

235 236 237 238 239 240
** FFAP

*** The option `ffap-url-unwrap-remote' can now be a list of strings,
specifying URL types which should be converted to remote file names at
the FFAP prompt.  The default is now '("ftp").

241 242 243 244 245 246 247
** Follow mode

*** The obsolete variable `follow-mode-off-hook' has been removed.

*** Follow mode no longer works by using advice.
The option `follow-intercept-processes' has been removed.

248 249
** The `server-auth-key' variable can be used to set a permanent
shared key for Emacs Server.
250 251 252 253

** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
closing brackets to be aligned with the line of the opening bracket.

Glenn Morris's avatar
Glenn Morris committed
254 255
** FIXME something happened to ses.el, 2012-04-17.

256 257
** which-function-mode now applies to all applicable major modes by default.

Michael Albinus's avatar
Michael Albinus committed
258 259 260 261 262 263 264 265 266
** Tramp

+++
*** The syntax has been extended in order to allow ad-hoc proxy
definitions.  See the manual for details.

+++
*** Remote processes are now supported also on remote Windows host.

267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296
** D-Bus

+++
*** New variables `dbus-compiled-version' and `dbus-runtime-version'.

+++
*** The D-Bus object manager interface is implemented.

+++
*** Variables of type :(u)int32 and :(u)int64 accept floating points,
if their value does not fit into Emacs's integer range.

+++
*** The function `dbus-call-method' works non-blocking now, it can be
interrupted by C-g.  `dbus-call-method-non-blocking' is obsolete.

+++
*** Signals can be sent also as unicast message.

+++
*** The argument list of `dbus-register-signal' has been extended,
according to the new match rule types of D-Bus.  See the manual for
details.

+++
*** `dbus-init-bus' supports private connections.

+++
*** There is a new function `dbus-setenv'.

297 298 299 300 301
+++
** notifications.el supports now version 1.2 of the Notifications API.
The function `notifications-get-capabilities' returns the supported
server properties.

302 303 304 305 306
** Package Menu

*** Newly-available packages are listed in the Package Menu as "new",
and sorted above the other "available" packages by default.

307 308
** Tabulated List and packages derived from it

309
*** New command `tabulated-list-sort', bound to `S', sorts the column
310 311
at point, or the Nth column if a numeric prefix argument is given.

312 313 314 315 316 317 318 319 320 321 322 323
** URL

*** Structs made by `url-generic-parse-url' have nil `attributes' slot.
Previously, this slot stored semicolon-separated attribute-value pairs
appended to some imap URLs, but this is not compatible with RFC 3986.
So now the `filename' slot stores the entire path and query components
and the `attributes' slot is always nil.

*** New function `url-encode-url' for encoding a URI string.
The `url-retrieve' function now uses this to encode its URL argument,
in case that is not properly encoded.

Glenn Morris's avatar
Glenn Morris committed
324 325
** Obsolete packages:

326 327 328 329 330
*** assoc.el
In most cases, assoc+member+push+delq work just as well.
And in any case it's just a terrible package: ugly semantics, terrible
inefficiency, and not namespace-clean.

331 332
*** bruce.el

Glenn Morris's avatar
Glenn Morris committed
333 334
*** ledit.el

Glenn Morris's avatar
Glenn Morris committed
335
*** mailpost.el
336 337 338

*** mouse-sel.el

339 340
*** patcomp.el

341 342
*** cust-print.el

Glenn Morris's avatar
Glenn Morris committed
343 344 345 346

* New Modes and Packages in Emacs 24.2

* Incompatible Lisp Changes in Emacs 24.2
347 348 349 350 351 352 353

+++
** Docstrings starting with `*' no longer indicate user options.
Only variables defined using `defcustom' are considered user options.
The function `user-variable-p' is now an obsolete alias for
`custom-variable-p'.

354 355 356
** `face-spec-set' no longer sets frame-specific attributes when the
third argument is a frame (that usage was obsolete since Emacs 22.2).

357 358 359 360 361
+++
** The arguments of `dbus-register-signal' are no longer just strings,
but keywords or keyword-string pairs.  The old argument list will
still be supported for Emacs 24.x.

362 363 364 365 366
** The following obsolete variables and varaliases have been removed:

*** `facemenu-unlisted-faces'
*** `rmail-decode-mime-charset'

Glenn Morris's avatar
Glenn Morris committed
367 368

* Lisp changes in Emacs 24.2
369

370 371 372 373 374
** `defun' also accepts a (declare DECLS) form, like `defmacro'.
The interpretation of the DECLS is determined by `defun-declarations-alist'.

** `macro-declaration-function' is obsolete, use `macro-declarations-alist'.

375 376 377 378
** New function `set-temporary-overlay-map'.

** New macros `setq-local' and `defvar-local'.

379
** New error type and new function `user-error'.  Doesn't trigger the debugger.
380

381 382 383
** The functions get-lru-window, get-mru-window and get-largest-window
now accept a third argument to avoid chosing the selected window.

384 385 386 387 388 389 390
** Completion

*** New function `completion-table-with-quoting' to handle completion
in the presence of quoting, such as file completion in shell buffers.

*** New function `completion-table-subvert' to use an existing completion
table, but with a different prefix.
391 392 393 394 395 396

** Time

*** `current-time-string' no longer requires that its argument's year
must be in the range 1000..9999.  It now works with any year supported
by the underlying C implementation.
397 398

** `automount-dir-prefix' is obsolete.
399
** `buffer-has-markers-at' is obsolete.
400 401 402 403 404 405 406 407

* Changes in Emacs 24.2 on non-free operating systems

** New configure.bat options on MS-Windows:

*** --without-libxml2 omits support for libxml2, even if its presence
is detected.

408 409 410 411
** When invoked with the -nw switch to run on the Windows text-mode terminal,
Emacs now supports mouse highlight, help-echo (in the echo area), and
mouse-autoselect-window.

412

413
* Installation Changes in Emacs 24.1
Chong Yidong's avatar
Chong Yidong committed
414

415 416 417 418
** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
to configure.  Note that other libraries used by Emacs, RSVG and GConf,
also depend on Gtk+.  You can disable them with --without-rsvg and
--without-gconf.
419

420 421 422 423
** Emacs can be compiled with GnuTLS support.
This happens by default if a suitably recent version of the library is
found at build time.  To prevent this, use the configure option
`--without-gnutls'.  See below for GnuTLS features.
424

425 426 427 428
** Emacs can be compiled with SELinux support.
This happens by default if a suitably recent version of the library is
found at build time.  To prevent this, use the configure option
`--without-selinux'.  See below for SELinux features.
Glenn Morris's avatar
Glenn Morris committed
429

430 431 432 433
** Emacs can be compiled with ImageMagick support.
This happens by default if a suitably recent version of the library is
found at build time.  To prevent this, use the configure option
`--without-imagemagick'.  See below for ImageMagick features.
Glenn Morris's avatar
Glenn Morris committed
434
This feature is not available for the Nextstep or MS ports.
435

436 437 438 439 440
** Emacs can be compiled with libxml2 support.
This happens by default if a suitably recent version of the library is
found at build time.  To prevent this, use the configure option
`--without-xml2'.  See below for libxml2 features.

441 442 443 444
** By default, the installed Info and man pages are compressed.
You can disable this by configuring --without-compress-info.

** New configure option --with-wide-int.
Paul Eggert's avatar
Paul Eggert committed
445
With it, Emacs integers typically have 62 bits, even on 32-bit machines.
446 447
On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
to about 2 GiB.
Paul Eggert's avatar
Paul Eggert committed
448

449
** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
450 451 452
These provide no new functionality, they just remove the need to edit
lib-src/Makefile by hand in order to use the associated features.

453
** New configure option --enable-use-lisp-union-type.
454 455
This is only useful for Emacs developers to debug certain types of bugs.
This is not a new feature; only the configure flag is new.
Chong Yidong's avatar
Chong Yidong committed
456 457 458 459 460 461 462

** The standalone programs digest-doc and sorted-doc are removed.
Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.

** The standalone program `fakemail' is removed.
If you need it, feedmail.el provides a superset of the functionality.

463

464
* Startup Changes in Emacs 24.1
465

466
** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
Glenn Morris's avatar
Glenn Morris committed
467 468
command line arguments, and the EMACS_UNIBYTE environment variable, no
longer have any effect.  (They were declared obsolete in Emacs 23.)
469

470
** New command line option `--no-site-lisp' removes site-lisp directories
471 472
from load-path.  -Q now implies this.  This option does not affect the
EMACSLOADPATH environment variable (and hence has no effect for
Glenn Morris's avatar
Glenn Morris committed
473
Nextstep builds).
474

475

476
* Changes in Emacs 24.1
477

478
** Completion
479

480 481 482
*** Many packages now use the `completion-at-point' command,
rather than implementing separate completion commands.

483
*** `completion-at-point' now handles tags and semantic completion.
484

485 486
*** Completion in a non-minibuffer now tries to detect the end of completion
and pops down the *Completions* buffer accordingly.
487 488 489 490

*** New option `completion-cycle-threshold' allows completion cycling.

*** New option `completion-category-overrides' for overriding the
491
default completion style in certain circumstances.
492

493
*** New completion style `substring'.
494 495 496 497

*** Completion of buffer names uses `substring' completion by default.

*** The option `widget-complete-field' has been removed.
498

499
** Mail changes
500

501 502 503 504 505 506
*** The first time you try sending mail, Emacs asks for a mail method.
This is implemented by a new default for `send-mail-function', which
is `sendmail-query-once'.  This offers to use the smtpmail package, or
to use the old defaults relying on external mail facilities
(`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
`mailclient-send-it' on Windows).
507

508 509 510
*** Typing C-c m in the buffer made by M-x report-emacs-bug transfers
the report to your desktop's preferred mail client, if there is one.
This uses either the "xdg-email" utility, or Mac OS's "open" command.
511

512 513
*** See Changes in Specialized Modes and Packages for SMTPmail changes
and Mail mode changes
Glenn Morris's avatar
Glenn Morris committed
514

Chong Yidong's avatar
Chong Yidong committed
515
** Emacs server and client changes
516

517
*** New option `server-port' specifies the port for TCP Emacs servers.
518

Chong Yidong's avatar
Chong Yidong committed
519
*** New emacsclient argument -q/--quiet suppresses some status messages.
520

521 522
*** New emacsclient argument --frame-parameters specifies the frame
parameters of any newly-created graphical frame.
523 524 525 526

*** If emacsclient shuts down due to Emacs signaling an error,
its exit status is 1.

Chong Yidong's avatar
Chong Yidong committed
527 528 529 530
*** New emacsclient argument --parent-id ID.
This opens a client frame in parent X window ID, via XEmbed, similar
to the --parent-id argument to Emacs.

531 532 533
** Internationalization changes

*** Emacs now supports display and editing of bidirectional text.
534 535
Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
displayed in the correct visual order as expected by users of those
536 537 538
scripts.  The display reordering is a "full bidirectionality" class
implementation of the Unicode Bidirectional Algorithm (UBA).  Buffers
with no RTL text should look exactly the same as before.
539

Chong Yidong's avatar
Chong Yidong committed
540
**** New buffer-local variable `bidi-display-reordering'.
541
To disable display reordering in a buffer, change this to nil.
542

Chong Yidong's avatar
Chong Yidong committed
543 544
**** New buffer-local variable `bidi-paragraph-direction'.
If nil (the default), Emacs determines the base direction of each
545 546 547
paragraph from its text, as specified by the UBA.  Setting the value
to `right-to-left' or `left-to-right' forces a base direction on each
paragraph.
548

549 550
Paragraphs with right-to-left base direction are displayed starting at
the right window edge.
551

552 553 554 555 556
*** Enhanced support for characters with no glyphs in available fonts,
or, on text terminals, characters that cannot be encoded by the
terminal coding system.  The new option `glyphless-char-display-control'
specifies how to display them: as a hexadecimal code in a box, a thin
1-pixel space, an empty box, etc.
557

558
*** New input methods: farsi, farsi-translit, bulgarian-alt-phonetic.
Chong Yidong's avatar
Chong Yidong committed
559

560 561 562
*** `nobreak-char-display' now also highlights Unicode hyphen chars
(U+2010 and U+2011).

563
*** New Hebrew translation of the Emacs Tutorial.
564 565 566
Type `C-u C-h t' to choose it in case your language setup doesn't
automatically select it.

567 568 569
** An Emacs Lisp package manager is now included.
This is a convenient way to download and install additional packages,
from a package repository at http://elpa.gnu.org.
570

571 572
*** M-x list-packages shows a list of packages, which can be
selected for installation.
573

574
*** New command `describe-package', bound to `C-h P'.
575

576 577 578
*** By default, all installed packages are loaded automatically when
Emacs starts up.  To disable this, set `package-enable-at-startup' to
nil.  To specify the packages to load, customize `package-load-list'.
Joakim Verona's avatar
Joakim Verona committed
579

580 581
** Custom theme changes

582 583
*** New command `M-x customize-themes', which provides a convenient
interface for enabling and disabling Custom themes.
584

585
*** New option `custom-theme-load-path' is the load path for themes.
586 587 588 589 590 591
Emacs no longer looks for Custom themes in `load-path'.  The default
value of `custom-theme-load-path' says to look for themes in
`custom-theme-directory', followed by a subdirectory of
`data-directory' named "themes/", which contains a small selection of
built-in Custom themes.

592 593 594 595
*** New option `custom-safe-themes' records known-safe theme files.
If a theme is not in this list, Emacs queries before loading it, and
offers to save the theme to `custom-safe-themes' automatically.  By
default, all themes included in Emacs are treated as safe.
596

597
** Improved GTK integration
598

599
*** GTK scroll-bars are now placed on the right by default.
600 601
The function `set-scroll-bar-mode' can change this.

602
*** GTK tool bars can have just text, just images or images and text.
603 604 605 606
Customize `tool-bar-style' to choose the style.  On a Gnome desktop,
the default is taken from desktop settings.

*** GTK tool bars can be placed on any edge of the frame.
607 608 609
The frame-parameter tool-bar-position controls this.  It takes the
values top, left, right or bottom.  The Options => Show/Hide menu has
entries for this.
610

611 612
*** The default colors for selected text (the `region' face) are taken
from the GTK theme when Emacs is built with GTK.
613

614 615
*** Emacs uses GTK tooltips by default if built with GTK.
You can disable this by changing `x-gtk-use-system-tooltips' to nil.
616

617 618 619 620 621 622 623 624 625 626 627 628 629
** Graphical interface changes

*** On graphical displays, the mode-line no longer ends in dashes.
Also, the first dash (which does not indicate anything) is just
displayed as a space.

*** `menu-bar-select-buffer-function' lets you choose another operation
instead of `switch-to-buffer' when selecting an item in the Buffers menu.

*** Lucid menus and dialogs can display antialiased fonts if Emacs is
built with Xft.  These fonts can be set via X resources, for example:
Emacs.pane.menubar.font: Courier-12

630
** Exiting changes
631

632
*** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
633 634
or if it receives a SIGINT signal in batch mode.

635 636 637
*** `kill-emacs-hook' is now also run in batch mode.
Third-party code which adds to `kill-emacs-hook' should check if they
do the right thing in batch mode.
638

Chong Yidong's avatar
Chong Yidong committed
639
** Scrolling changes
640

Chong Yidong's avatar
Chong Yidong committed
641
*** New scrolling commands `scroll-up-command' and `scroll-down-command'
Juanma Barranquero's avatar
Juanma Barranquero committed
642
(bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
643
of buffer at first key-press (instead they move to top/bottom of buffer)
644
when `scroll-error-top-bottom' is non-nil.
645 646 647

*** New option `scroll-error-top-bottom' (see above).

Chong Yidong's avatar
Chong Yidong committed
648
*** New scrolling commands `scroll-up-line' and `scroll-down-line'
649
scroll a line instead of full screen.
650

Chong Yidong's avatar
Chong Yidong committed
651
*** New property `scroll-command' should be set on a command's symbol to
Esa Peuha's avatar
Esa Peuha committed
652
define it as a scroll command affected by `scroll-preserve-screen-position'.
653

Chong Yidong's avatar
Chong Yidong committed
654
*** If you customize `scroll-conservatively' to a value greater than 100,
655 656 657 658
Emacs will never recenter point in the window when it scrolls due to
cursor motion commands or commands that move point (e.f., `M-g M-g').
Previously, you needed to use `most-positive-fixnum' as the value of
`scroll-conservatively' to achieve the same effect.
659

660
*** "Aggressive" scrolling now honors the scroll margins.
661 662 663 664 665
If you customize `scroll-up-aggressively' or
`scroll-down-aggressively' and move point off the window, Emacs now
scrolls the window so as to avoid positioning point inside the scroll
margin.

666 667
** Basic SELinux support has been added.
This requires Emacs to be linked with libselinux at build time.
668

669 670 671 672
*** Emacs preserves the SELinux file context when backing up.
Also, the function `copy-file' has an extra optional argument for
preserving SELinux context, and the return value of `backup-buffer'
now includes the SELinux context.
673

674
*** New functions `file-selinux-context' and `set-file-selinux-context'
675
get and set the SELinux context of a file.
676

677
** Trash changes
678

679 680
*** `delete-by-moving-to-trash' now only affects commands that specify
trashing.  This avoids inadvertently trashing temporary files.
681

682 683
*** Calling `delete-file' or `delete-directory' with a prefix argument
now forces true deletion, regardless of `delete-by-moving-to-trash'.
684

Chong Yidong's avatar
Chong Yidong committed
685
** File- and directory-local variable changes
686

Chong Yidong's avatar
Chong Yidong committed
687 688 689 690
*** You can stop directory local vars from applying to subdirectories.
Add an element (subdirs . nil) to the alist portion of any variables
settings to indicate that the section should not apply to
subdirectories.
691

Chong Yidong's avatar
Chong Yidong committed
692 693 694 695 696
*** Directory local variables can apply to some file-less buffers.
Affected modes include dired, vc-dir, and log-edit.  For example,
adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
turn on `whitespace-mode' for *vc-diff* buffers.  Modes should call
`hack-dir-local-variables-non-file-buffer' to support this.
697

Chong Yidong's avatar
Chong Yidong committed
698 699
*** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
Instead, use "eval: (minor-mode 1)".
Glenn Morris's avatar
Glenn Morris committed
700

Glenn Morris's avatar
Glenn Morris committed
701 702
*** The variable `inhibit-first-line-modes-regexps' has been renamed
to `inhibit-local-variables-regexps'.  As the name suggests, it now
703 704 705
applies to ALL file local variables, not just -*- lines.  The
associated `inhibit-first-line-modes-suffixes' has been renamed in the
corresponding way.
706

707 708
** Window changes

709 710 711
*** The `quit-window' command now restores the last buffer displayed
in the quitted window.

712 713 714 715
*** Resizing an Emacs frame now preserves proportional window sizes,
modulo restrictions like window minimum sizes and fixed-size windows.

*** The behavior of `display-buffer' is now customizable in detail.
716

717 718 719 720 721 722 723 724 725 726
**** New option `display-buffer-base-action' specifies a list of
user-determined display "actions" (functions and optional arguments
for choosing the displaying window).

This takes precedence over the default display action, which is
specified by `display-buffer-fallback-action'.

**** New option `display-buffer-alist' maps buffer name regexps to
display actions, taking precedence over `display-buffer-base-action'.

727 728 729 730
*** New option `window-combination-limit'.
The new option `window-combination-limit' allows to return the space
obtained for resizing or creating a window more reliably to the window
from which such space was obtained.
731

732 733 734 735 736
*** New option `window-combination-resize'.
The new option `window-combination-resize' allows to split a window that
otherwise cannot be split because it's too small by stealing space from
other windows in the same combination.  Subsequent resizing or deletion
of the window will resize all windows in the same combination as well.
737

738 739 740 741
*** New option `frame-auto-hide-function' lets you choose between
iconifying or deleting a frame when burying a buffer in a dedicated
frame, or quitting a window showing a buffer in a frame of its own.

742
*** New commands `maximize-window' and `minimize-window'.
Paul Eggert's avatar
Paul Eggert committed
743
These maximize and minimize the size of a window within its frame.
744 745 746 747 748

*** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
These functions allow to navigate through the live buffers that have
been shown in a specific window.

749
** Minibuffer changes
750

751
*** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
752 753
This is handy for minibuffer-only frames, and is also used for the feature
where mouse-1 pops up *Messages*"', which can now easily be changed.
Chong Yidong's avatar
Chong Yidong committed
754

755
*** Minibuffers set `truncate-lines' to nil.
Glenn Morris's avatar
NEWS  
Glenn Morris committed
756
If you want to change the value to something else, you could use
757 758 759 760 761
for example `minibuffer-setup-hook'.

** `auto-mode-case-fold' is now enabled by default.

** `backup-by-copying-when-mismatch' now defaults to t.
Glenn Morris's avatar
NEWS  
Glenn Morris committed
762

763 764 765 766 767 768 769 770 771
** New basic faces `error', `warning', `success'.
These are used to highlight text indicating failure, caution or
successful operation.

** New option `list-colors-sort' defines the color sort order
for `list-colors-display'.

** The variable `focus-follows-mouse' now always defaults to nil.

772

773
* Editing Changes in Emacs 24.1
774

775
** Search changes
776 777 778 779 780 781 782 783 784

*** C-y in Isearch is now bound to `isearch-yank-kill', instead of
`isearch-yank-line'.

*** M-y in Isearch is now bound to `isearch-yank-pop', instead of
`isearch-yank-kill'.

*** M-s C-e in Isearch is now bound to `isearch-yank-line'.

785
** New commands `count-words-region' and `count-words'.
786

787 788 789 790 791
*** M-= is bound to `count-words-region', not `count-lines-region'.
The `count-words-region' command, when called interactively, reports
the number of lines, words, and characters in the region.  It is a
superset of the old `count-lines-region', which is now an obsolete
alias for it.
Glenn Morris's avatar
Glenn Morris committed
792

793
** The command `just-one-space' (M-SPC), if given a negative argument,
794 795
also deletes newlines around point.

796
** Deletion changes
797

798
*** New option `delete-active-region'.
799
If non-nil, [delete] and DEL delete the region if it is active and no
800
prefix argument is given.  If set to `kill', those commands kill
801
instead.
802

803
*** New command `delete-forward-char', bound to [delete].
804 805
This is meant for interactive use, and obeys `delete-active-region'.
The command `delete-char' does not obey `delete-active-region'.
806

807 808
*** `delete-backward-char' is now a Lisp function.
Apart from obeying `delete-active-region', its behavior is unchanged.
809 810
However, the byte compiler now warns if it is called from Lisp; Lisp
callers should use delete-char with a negative argument instead.
811

812 813
*** The option `mouse-region-delete-keys' has been deleted.

814 815
** Selection changes.

816 817 818 819
The default handling of clipboard and primary selections has been
changed to conform with modern X applications.  In short, most
commands for killing and yanking text now use the clipboard, while
mouse commands use the primary selection.
820 821 822 823 824 825

In the following, we provide a list of these changes, followed by a
list of steps to get the old behavior back if you prefer that.

*** `select-active-regions' now defaults to t.
Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
826
the kill ring.  The selected text is put in the primary selection, if
827 828 829 830 831 832 833 834
the system possesses a separate primary selection facility (e.g. X).

**** `select-active-regions' also accepts a new value, `only'.
This means to only set the primary selection for temporarily active
regions (usually made by mouse-dragging or shift-selection);
"ordinary" active regions, such as those made with C-SPC followed by
point motion, do not alter the primary selection.

835 836
**** `mouse-drag-copy-region' now defaults to nil.

837 838 839
*** mouse-2 is now bound to `mouse-yank-primary'.
This pastes from the primary selection, ignoring the kill-ring.
Previously, mouse-2 was bound to `mouse-yank-at-click'.
840

841
*** `x-select-enable-clipboard' now defaults to t on all platforms.
842

843 844 845 846 847
*** `x-select-enable-primary' now defaults to nil.
Thus, commands that kill text or copy it to the kill-ring (such as
M-w, C-w, and C-k) also use the clipboard---not the primary selection.

**** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
848
exactly equivalent to M-w, C-w, and C-y respectively.
849 850 851 852 853 854

**** Note that on MS-Windows, `x-select-enable-clipboard' was already
non-nil by default, as Windows does not support the primary selection
between applications.

*** To return to the previous behavior, do the following:
855

856
**** Change `select-active-regions' to nil.
857 858 859 860
**** Change `mouse-drag-copy-region' to t.
**** Change `x-select-enable-primary' to t (on X only).
**** Change `x-select-enable-clipboard' to nil.
**** Bind `mouse-yank-at-click' to mouse-2.
861

862
*** Support for X cut buffers has been removed.
863

864 865
*** X clipboard managers are now supported.
To inhibit this, change `x-select-enable-clipboard-manager' to nil.
866

867 868 869
** New command `C-x r N' (`rectangle-number-lines') numbers the lines
in the current rectangle.  With a prefix argument, this prompts for a
number to count from and for a format string.
870

871
** `redisplay-dont-pause' now defaults to t.
872 873 874 875 876
This makes Emacs feel more responsive to editing commands that arrive
at high rate, e.g. if you lean on some key, because stopping redisplay
in the middle (when this variable is nil) forces more expensive
updates later on, and Emacs appears to be unable to keep up.

877 878 879 880 881 882
** The behavior of <TAB> for active regions in Text mode has changed.
In Text and related modes, typing <TAB> (`indent-for-tab-command')
when the region is active causes Emacs to indent all the lines in the
region, aligning them with the line previous to the first line in the
region (or with the left margin if there is no previous line).

883 884 885 886 887 888
** When `occur' is called with a prefix argument, matching strings are
collected into the `*Occur*' buffer without line numbers.  If there
are parenthesized subexpressions in the specified regexp, `occur'
reads replacement text that may contain \\& and \\N whose convention
follows `replace-match'.

889

890
* Changes in Specialized Modes and Packages in Emacs 24.1
891

Chong Yidong's avatar
Chong Yidong committed
892
** Archive Mode has basic support for browsing and updating 7z archives.
893

894
** BibTeX mode
895

896
*** BibTeX mode now supports biblatex.
897 898 899 900
Use the variable `bibtex-dialect' to select different BibTeX dialects.
`bibtex-entry-field-alist' is now an obsolete alias for
`bibtex-BibTeX-entry-alist'.

901 902
*** New command `bibtex-search-entries', bound to C-c C-a.

903
*** New `bibtex-entry-format' option `sort-fields', disabled by default.
904

905 906
*** New variable `bibtex-search-entry-globally'.

907
** Browse-url
908

909
*** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
910

911 912 913
*** The default browser used by the package is now the "xdg-open" program,
on platforms that support it.  This calls your desktop's preferred browser.

Glenn Morris's avatar
Glenn Morris committed
914 915
** Calendar, Diary, and Appt

916
*** Diary entries can contain non-printing "comments".
Glenn Morris's avatar
Glenn Morris committed
917 918
See the variable `diary-comment-start'.

919 920 921
*** Appointments can specify their individual warning times.
See the variable `appt-warning-time-regexp'.

922 923 924 925
*** The function specified by `appt-disp-window-function' may be passed
lists of arguments if multiple appointments are due at similar times.
If you are using a custom function for this, you should update it.

926 927
*** New function `diary-hebrew-birthday'.

928 929 930
*** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
may no longer be nil, but must all be strings.

931 932 933
*** The obsolete (since Emacs 22.1) method of enabling the appt
package by adding `appt-make-list' to `diary-hook' has been removed.
Use `appt-activate' instead.
Glenn Morris's avatar
Glenn Morris committed
934 935 936 937 938 939 940 941

*** Some appt variables (obsolete since Emacs 22.1) have been removed:
appt-issue-message (use the function appt-activate)
appt-visible/appt-msg-window (use the variable appt-display-format)

*** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
view-diary-entries, list-diary-entries, show-all-diary-entries

Alan Mackenzie's avatar
Alan Mackenzie committed
942
** CC Mode
943

Alan Mackenzie's avatar
Alan Mackenzie committed
944
*** New feature to "guess" the style in an existing buffer.
945
The main entry point is M-x c-guess.
Chong Yidong's avatar
Chong Yidong committed
946

Alan Mackenzie's avatar
Alan Mackenzie committed
947 948
*** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).

949
*** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
Alan Mackenzie's avatar
Alan Mackenzie committed
950 951 952
Thus C-M-a will, by default, go to the beginning of the immediate function,
not the top level.

953
*** "Macros with semicolons" can be registered for correct indentation.
Alan Mackenzie's avatar
Alan Mackenzie committed
954 955 956
Where such a macro ends a line (no semicolon) the next statement is no longer
parsed as a statement continuation.

957
** Comint and modes derived from it use the standard completion code.
Chong Yidong's avatar
Chong Yidong committed
958 959

** Compilation mode
960

961
*** Compilation mode can be used without Font Lock mode.
Chong Yidong's avatar
Chong Yidong committed
962 963
`compilation-parse-errors-function' is now obsolete.

964
*** New variable `compilation-filter-start', which is bound while
965 966
`compilation-filter-hook' runs.  It records the start position of the
text inserted by `compilation-filter'.
Chong Yidong's avatar
Chong Yidong committed
967

968 969
*** `compilation-error-screen-columns' and `compilation-first-column'
are obeyed in the editing buffer.  So programming language modes can
970 971
set them, whereas previously only the value in the *Compilation*
buffer was used.
972

973 974 975 976
** Customize

*** Customize buffers now contain a search field.
The search is performed using `customize-apropos'.
977
To turn off the search field, set `custom-search-field' to nil.
978 979 980 981 982 983 984

*** Custom options now start out hidden if at their default values.
Use the arrow to the left of the option name to toggle visibility.

*** custom-buffer-sort-alphabetically now defaults to t.

*** The color widget now has a "Choose" button, which allows you to