NEWS 70 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 86
** 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.

87 88 89 90
+++
** You can prevent the creation of lock files by setting `create-lockfiles'
to nil.  Use with caution, and only if you really need to.

91
+++
92
** Using "unibyte: t" in Lisp source files is obsolete.
Glenn Morris's avatar
Glenn Morris committed
93
Use "coding: raw-text" instead.
94

95 96 97 98 99 100
** 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.

101 102 103
*** You can now click mouse-3 in the coding system indicator to
invokes `set-buffer-file-coding-system'.

104 105 106 107
+++
** Setting `enable-remote-dir-locals' to non-nil allows directory
local variables on remote hosts.

Glenn Morris's avatar
Glenn Morris committed
108 109

* Editing Changes in Emacs 24.2
110

111 112 113 114 115 116
** 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.

117 118 119
** M-x move-to-column, if called interactively with no prefix arg, now
prompts for a column number.

120 121 122
** `mouse-avoidance-banish-position' can now be used to customize
`mouse-avoidance-mode' further.

123 124 125
** `C-M-f' and `C-M-b' will now move to the path name separator
character when doing minibuffer filename prompts.

126 127
** `goto-char' is now bound to `M-g c'.

Glenn Morris's avatar
Glenn Morris committed
128 129

* Changes in Specialized Modes and Packages in Emacs 24.2
130

131 132 133 134 135 136 137 138 139 140 141 142
** 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.

143 144 145 146 147 148
** 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.

149 150 151 152 153 154 155 156 157 158 159
** 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
160 161 162
** Ediff now uses the same color scheme as Diff mode
on high color displays.

163 164 165 166 167
** `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.

168 169
** reStructuredText mode

170 171
*** Rebind nearly all keys making room for more keys and complying
better to usage in other modes.  Describe bindings with C-c C-h.
172

173 174
*** Major revision of indentation working very similar to other
modes.  TAB is your friend.
175

176 177
*** Major revision of filling working fine with most of
reStructuredText syntax.  Support auto-filling.
178 179 180

*** Major revision of comment handling.

181
*** Major revision of fontification working with `jit-lock-mode'.
182

183 184
*** Cover reStructuredText syntax more closely.  Improve
the experience for Sphinx users.
185

186
*** `rst-insert-list' inserts new list or continues existing lists.
187

188
*** Extend correct and improve customization.
189 190 191

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

192
*** Reset window configuration after displaying TOC.
193

194
*** Package version in `rst-version'.
195

196 197
** 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'.
198

Chong Yidong's avatar
Chong Yidong committed
199 200 201 202 203 204 205 206 207
** 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.).

208 209 210 211 212 213
** 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.

214 215
** Calendar

216 217
*** The calendars produced by cal-html include holidays.
Customize cal-html-holidays to change this.
218

219 220 221
** Customize

*** `custom-reset-button-menu' now defaults to t.
222

223 224 225 226
*** Non-option variables are never matched in `customize-apropos' and
`customize-apropos-options' (i.e. the prefix argument does nothing for
these commands now).

227
** erc will look up server/channel names via auth-source and use the
228
channel keys found, if any.
229

230 231 232 233 234 235
** 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").

236 237 238 239 240 241 242
** 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.

243 244
** The `server-auth-key' variable can be used to set a permanent
shared key for Emacs Server.
245 246 247 248

** 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
249 250
** FIXME something happened to ses.el, 2012-04-17.

251 252
** which-function-mode now applies to all applicable major modes by default.

Michael Albinus's avatar
Michael Albinus committed
253 254 255 256 257 258 259 260 261
** 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.

262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291
** 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'.

292 293 294 295 296
+++
** notifications.el supports now version 1.2 of the Notifications API.
The function `notifications-get-capabilities' returns the supported
server properties.

297 298
** Tabulated List and packages derived from it

299
*** New command `tabulated-list-sort', bound to `S', sorts the column
300 301
at point, or the Nth column if a numeric prefix argument is given.

302 303 304 305 306 307 308 309 310 311 312 313
** 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
314 315
** Obsolete packages:

316 317 318 319 320
*** 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.

321 322
*** bruce.el

Glenn Morris's avatar
Glenn Morris committed
323 324
*** ledit.el

Glenn Morris's avatar
Glenn Morris committed
325
*** mailpost.el
326 327 328

*** mouse-sel.el

329 330
*** patcomp.el

331 332
*** cust-print.el

Glenn Morris's avatar
Glenn Morris committed
333 334 335 336

* New Modes and Packages in Emacs 24.2

* Incompatible Lisp Changes in Emacs 24.2
337 338 339 340 341 342 343

+++
** 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'.

344 345 346
** `face-spec-set' no longer sets frame-specific attributes when the
third argument is a frame (that usage was obsolete since Emacs 22.2).

347 348 349 350 351
+++
** 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.

352 353 354 355 356
** The following obsolete variables and varaliases have been removed:

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

Glenn Morris's avatar
Glenn Morris committed
357 358

* Lisp changes in Emacs 24.2
359

360 361 362 363 364
** `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'.

365 366 367 368
** New function `set-temporary-overlay-map'.

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

369
** New error type and new function `user-error'.  Doesn't trigger the debugger.
370

371 372 373
** The functions get-lru-window, get-mru-window and get-largest-window
now accept a third argument to avoid chosing the selected window.

374 375 376 377 378 379 380
** 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.
381 382 383 384 385 386

** 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.
387 388

** `automount-dir-prefix' is obsolete.
389
** `buffer-has-markers-at' is obsolete.
390 391 392 393 394 395 396 397

* 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.

398 399 400 401
** 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.

402

403
* Installation Changes in Emacs 24.1
Chong Yidong's avatar
Chong Yidong committed
404

405 406 407 408
** 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.
409

410 411 412 413
** 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.
414

415 416 417 418
** 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
419

420 421 422 423
** 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
424
This feature is not available for the Nextstep or MS ports.
425

426 427 428 429 430
** 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.

431 432 433 434
** 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
435
With it, Emacs integers typically have 62 bits, even on 32-bit machines.
436 437
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
438

439
** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
440 441 442
These provide no new functionality, they just remove the need to edit
lib-src/Makefile by hand in order to use the associated features.

443
** New configure option --enable-use-lisp-union-type.
444 445
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
446 447 448 449 450 451 452

** 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.

453

454
* Startup Changes in Emacs 24.1
455

456
** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
Glenn Morris's avatar
Glenn Morris committed
457 458
command line arguments, and the EMACS_UNIBYTE environment variable, no
longer have any effect.  (They were declared obsolete in Emacs 23.)
459

460
** New command line option `--no-site-lisp' removes site-lisp directories
461 462
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
463
Nextstep builds).
464

465

466
* Changes in Emacs 24.1
467

468
** Completion
469

470 471 472
*** Many packages now use the `completion-at-point' command,
rather than implementing separate completion commands.

473
*** `completion-at-point' now handles tags and semantic completion.
474

475 476
*** Completion in a non-minibuffer now tries to detect the end of completion
and pops down the *Completions* buffer accordingly.
477 478 479 480

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

*** New option `completion-category-overrides' for overriding the
481
default completion style in certain circumstances.
482

483
*** New completion style `substring'.
484 485 486 487

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

*** The option `widget-complete-field' has been removed.
488

489
** Mail changes
490

491 492 493 494 495 496
*** 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).
497

498 499 500
*** 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.
501

502 503
*** See Changes in Specialized Modes and Packages for SMTPmail changes
and Mail mode changes
Glenn Morris's avatar
Glenn Morris committed
504

Chong Yidong's avatar
Chong Yidong committed
505
** Emacs server and client changes
506

507
*** New option `server-port' specifies the port for TCP Emacs servers.
508

Chong Yidong's avatar
Chong Yidong committed
509
*** New emacsclient argument -q/--quiet suppresses some status messages.
510

511 512
*** New emacsclient argument --frame-parameters specifies the frame
parameters of any newly-created graphical frame.
513 514 515 516

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

Chong Yidong's avatar
Chong Yidong committed
517 518 519 520
*** 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.

521 522 523
** Internationalization changes

*** Emacs now supports display and editing of bidirectional text.
524 525
Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
displayed in the correct visual order as expected by users of those
526 527 528
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.
529

Chong Yidong's avatar
Chong Yidong committed
530
**** New buffer-local variable `bidi-display-reordering'.
531
To disable display reordering in a buffer, change this to nil.
532

Chong Yidong's avatar
Chong Yidong committed
533 534
**** New buffer-local variable `bidi-paragraph-direction'.
If nil (the default), Emacs determines the base direction of each
535 536 537
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.
538

539 540
Paragraphs with right-to-left base direction are displayed starting at
the right window edge.
541

542 543 544 545 546
*** 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.
547

548
*** New input methods: farsi, farsi-translit, bulgarian-alt-phonetic.
Chong Yidong's avatar
Chong Yidong committed
549

550 551 552
*** `nobreak-char-display' now also highlights Unicode hyphen chars
(U+2010 and U+2011).

553
*** New Hebrew translation of the Emacs Tutorial.
554 555 556
Type `C-u C-h t' to choose it in case your language setup doesn't
automatically select it.

557 558 559
** 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.
560

561 562
*** M-x list-packages shows a list of packages, which can be
selected for installation.
563

564
*** New command `describe-package', bound to `C-h P'.
565

566 567 568
*** 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
569

570 571
** Custom theme changes

572 573
*** New command `M-x customize-themes', which provides a convenient
interface for enabling and disabling Custom themes.
574

575
*** New option `custom-theme-load-path' is the load path for themes.
576 577 578 579 580 581
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.

582 583 584 585
*** 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.
586

587
** Improved GTK integration
588

589
*** GTK scroll-bars are now placed on the right by default.
590 591
The function `set-scroll-bar-mode' can change this.

592
*** GTK tool bars can have just text, just images or images and text.
593 594 595 596
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.
597 598 599
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.
600

601 602
*** The default colors for selected text (the `region' face) are taken
from the GTK theme when Emacs is built with GTK.
603

604 605
*** Emacs uses GTK tooltips by default if built with GTK.
You can disable this by changing `x-gtk-use-system-tooltips' to nil.
606

607 608 609 610 611 612 613 614 615 616 617 618 619
** 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

620
** Exiting changes
621

622
*** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
623 624
or if it receives a SIGINT signal in batch mode.

625 626 627
*** `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.
628

Chong Yidong's avatar
Chong Yidong committed
629
** Scrolling changes
630

Chong Yidong's avatar
Chong Yidong committed
631
*** New scrolling commands `scroll-up-command' and `scroll-down-command'
Juanma Barranquero's avatar
Juanma Barranquero committed
632
(bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
633
of buffer at first key-press (instead they move to top/bottom of buffer)
634
when `scroll-error-top-bottom' is non-nil.
635 636 637

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

Chong Yidong's avatar
Chong Yidong committed
638
*** New scrolling commands `scroll-up-line' and `scroll-down-line'
639
scroll a line instead of full screen.
640

Chong Yidong's avatar
Chong Yidong committed
641
*** New property `scroll-command' should be set on a command's symbol to
Esa Peuha's avatar
Esa Peuha committed
642
define it as a scroll command affected by `scroll-preserve-screen-position'.
643

Chong Yidong's avatar
Chong Yidong committed
644
*** If you customize `scroll-conservatively' to a value greater than 100,
645 646 647 648
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.
649

650
*** "Aggressive" scrolling now honors the scroll margins.
651 652 653 654 655
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.

656 657
** Basic SELinux support has been added.
This requires Emacs to be linked with libselinux at build time.
658

659 660 661 662
*** 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.
663

664
*** New functions `file-selinux-context' and `set-file-selinux-context'
665
get and set the SELinux context of a file.
666

667
** Trash changes
668

669 670
*** `delete-by-moving-to-trash' now only affects commands that specify
trashing.  This avoids inadvertently trashing temporary files.
671

672 673
*** Calling `delete-file' or `delete-directory' with a prefix argument
now forces true deletion, regardless of `delete-by-moving-to-trash'.
674

Chong Yidong's avatar
Chong Yidong committed
675
** File- and directory-local variable changes
676

Chong Yidong's avatar
Chong Yidong committed
677 678 679 680
*** 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.
681

Chong Yidong's avatar
Chong Yidong committed
682 683 684 685 686
*** 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.
687

Chong Yidong's avatar
Chong Yidong committed
688 689
*** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
Instead, use "eval: (minor-mode 1)".
Glenn Morris's avatar
Glenn Morris committed
690

Glenn Morris's avatar
Glenn Morris committed
691 692
*** The variable `inhibit-first-line-modes-regexps' has been renamed
to `inhibit-local-variables-regexps'.  As the name suggests, it now
693 694 695
applies to ALL file local variables, not just -*- lines.  The
associated `inhibit-first-line-modes-suffixes' has been renamed in the
corresponding way.
696

697 698
** Window changes

699 700 701
*** The `quit-window' command now restores the last buffer displayed
in the quitted window.

702 703 704 705
*** 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.
706

707 708 709 710 711 712 713 714 715 716
**** 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'.

717 718 719 720
*** 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.
721

722 723 724 725 726
*** 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.
727

728 729 730 731
*** 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.

732
*** New commands `maximize-window' and `minimize-window'.
Paul Eggert's avatar
Paul Eggert committed
733
These maximize and minimize the size of a window within its frame.
734 735 736 737 738

*** 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.

739
** Minibuffer changes
740

741
*** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
742 743
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
744

745
*** Minibuffers set `truncate-lines' to nil.
Glenn Morris's avatar
NEWS  
Glenn Morris committed
746
If you want to change the value to something else, you could use
747 748 749 750 751
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
752

753 754 755 756 757 758 759 760 761
** 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.

762

763
* Editing Changes in Emacs 24.1
764

765
** Search changes
766 767 768 769 770 771 772 773 774

*** 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'.

775
** New commands `count-words-region' and `count-words'.
776

777 778 779 780 781
*** 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
782

783
** The command `just-one-space' (M-SPC), if given a negative argument,
784 785
also deletes newlines around point.

786
** Deletion changes
787

788
*** New option `delete-active-region'.
789
If non-nil, [delete] and DEL delete the region if it is active and no
790
prefix argument is given.  If set to `kill', those commands kill
791
instead.
792

793
*** New command `delete-forward-char', bound to [delete].
794 795
This is meant for interactive use, and obeys `delete-active-region'.
The command `delete-char' does not obey `delete-active-region'.
796

797 798
*** `delete-backward-char' is now a Lisp function.
Apart from obeying `delete-active-region', its behavior is unchanged.
799 800
However, the byte compiler now warns if it is called from Lisp; Lisp
callers should use delete-char with a negative argument instead.
801

802 803
*** The option `mouse-region-delete-keys' has been deleted.

804 805
** Selection changes.

806 807 808 809
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.
810 811 812 813 814 815

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
816
the kill ring.  The selected text is put in the primary selection, if
817 818 819 820 821 822 823 824
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.

825 826
**** `mouse-drag-copy-region' now defaults to nil.

827 828 829
*** 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'.
830

831
*** `x-select-enable-clipboard' now defaults to t on all platforms.
832

833 834 835 836 837
*** `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
838
exactly equivalent to M-w, C-w, and C-y respectively.
839 840 841 842 843 844

**** 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:
845

846
**** Change `select-active-regions' to nil.
847 848 849 850
**** 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.
851

852
*** Support for X cut buffers has been removed.
853

854 855
*** X clipboard managers are now supported.
To inhibit this, change `x-select-enable-clipboard-manager' to nil.
856

857 858 859
** 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.
860

861
** `redisplay-dont-pause' now defaults to t.
862 863 864 865 866
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.

867 868 869 870 871 872
** 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).

873 874 875 876 877 878
** 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'.

879

880
* Changes in Specialized Modes and Packages in Emacs 24.1
881

Chong Yidong's avatar
Chong Yidong committed
882
** Archive Mode has basic support for browsing and updating 7z archives.
883

884
** BibTeX mode
885

886
*** BibTeX mode now supports biblatex.
887 888 889 890
Use the variable `bibtex-dialect' to select different BibTeX dialects.
`bibtex-entry-field-alist' is now an obsolete alias for
`bibtex-BibTeX-entry-alist'.

891 892
*** New command `bibtex-search-entries', bound to C-c C-a.

893
*** New `bibtex-entry-format' option `sort-fields', disabled by default.
894

895 896
*** New variable `bibtex-search-entry-globally'.

897
** Browse-url
898

899
*** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
900

901 902 903
*** 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
904 905
** Calendar, Diary, and Appt

906
*** Diary entries can contain non-printing "comments".
Glenn Morris's avatar
Glenn Morris committed
907 908
See the variable `diary-comment-start'.

909 910 911
*** Appointments can specify their individual warning times.
See the variable `appt-warning-time-regexp'.

912 913 914 915
*** 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.

916 917
*** New function `diary-hebrew-birthday'.

918 919 920
*** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
may no longer be nil, but must all be strings.

921 922 923
*** 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
924 925 926 927 928 929 930 931

*** 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
932
** CC Mode
933

Alan Mackenzie's avatar
Alan Mackenzie committed
934
*** New feature to "guess" the style in an existing buffer.
935
The main entry point is M-x c-guess.
Chong Yidong's avatar
Chong Yidong committed
936

Alan Mackenzie's avatar
Alan Mackenzie committed
937 938
*** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).

939
*** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
Alan Mackenzie's avatar
Alan Mackenzie committed
940 941 942
Thus C-M-a will, by default, go to the beginning of the immediate function,
not the top level.

943
*** "Macros with semicolons" can be registered for correct indentation.
Alan Mackenzie's avatar
Alan Mackenzie committed
944 945 946
Where such a macro ends a line (no semicolon) the next statement is no longer
parsed as a statement continuation.

947
** Comint and modes derived from it use the standard completion code.
Chong Yidong's avatar
Chong Yidong committed
948 949

** Compilation mode
950

951
*** Compilation mode can be used without Font Lock mode.
Chong Yidong's avatar
Chong Yidong committed
952 953
`compilation-parse-errors-function' is now obsolete.

954
*** New variable `compilation-filter-start', which is bound while
955 956
`compilation-filter-hook' runs.  It records the start position of the
text inserted by `compilation-filter'.
Chong Yidong's avatar
Chong Yidong committed
957

958 959
*** `compilation-error-screen-columns' and `compilation-first-column'
are obeyed in the editing buffer.  So programming language modes can
960 961
set them, whereas previously only the value in the *Compilation*
buffer was used.
962

963 964 965 966
** Customize

*** Customize buffers now contain a search field.
The search is performed using `customize-apropos'.
967
To turn off the search field, set `custom-search-field' to nil.
968 969 970 971 972 973 974

*** 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
975
choose a color via `list-colors-display'.
976

Chong Yidong's avatar
Chong Yidong committed
977 978
** D-Bus

Glenn Morris's avatar
Glenn Morris committed
979 980
*** It is now possible to access buses other than the default system
or session bus.