NEWS 69.3 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

* Startup Changes in Emacs 24.2
49 50 51 52 53

** 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
54 55 56

* Changes in Emacs 24.2

57 58 59
** 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
60 61 62
** If your Emacs was built from a bzr checkout, the new variable
`emacs-bzr-version' contains information about which bzr revision was used.

63 64 65
** 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
66 67
automatically at startup, or when customizing a relevant imagemagick-
option.
68 69

*** Setting `imagemagick-types-inhibit' to t now disables the use of
70 71
ImageMagick to view images.  You must call imagemagick-register-types
afterwards if you do not use customize to change this.
72

73
*** The new variable `imagemagick-enabled-types' also affects which
74 75 76
ImageMagick types are treated as images.  The function
`imagemagick-filter-types' returns the list of types that will be
treated as images.
77

78 79 80 81
** 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.

82 83 84 85
+++
** You can prevent the creation of lock files by setting `create-lockfiles'
to nil.  Use with caution, and only if you really need to.

86
+++
87
** Using "unibyte: t" in Lisp source files is obsolete.
Glenn Morris's avatar
Glenn Morris committed
88
Use "coding: raw-text" instead.
89

90 91 92 93 94 95
** 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.

96 97 98
*** You can now click mouse-3 in the coding system indicator to
invokes `set-buffer-file-coding-system'.

Glenn Morris's avatar
Glenn Morris committed
99 100

* Editing Changes in Emacs 24.2
101

102 103 104 105 106 107
** 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.

108 109 110
** M-x move-to-column, if called interactively with no prefix arg, now
prompts for a column number.

111 112 113
** `mouse-avoidance-banish-position' can now be used to customize
`mouse-avoidance-mode' further.

114 115 116
** `C-M-f' and `C-M-b' will now move to the path name separator
character when doing minibuffer filename prompts.

117 118
** `goto-char' is now bound to `M-g c'.

Glenn Morris's avatar
Glenn Morris committed
119 120

* Changes in Specialized Modes and Packages in Emacs 24.2
121

122 123 124 125 126 127 128 129 130 131 132 133
** 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.

134 135 136 137 138 139
** 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.

140 141 142 143 144 145 146 147 148 149 150
** 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
151 152 153
** Ediff now uses the same color scheme as Diff mode
on high color displays.

154 155 156 157 158
** `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.

159 160
** reStructuredText mode

161 162
*** Rebind nearly all keys making room for more keys and complying
better to usage in other modes.  Describe bindings with C-c C-h.
163

164 165
*** Major revision of indentation working very similar to other
modes.  TAB is your friend.
166

167 168
*** Major revision of filling working fine with most of
reStructuredText syntax.  Support auto-filling.
169 170 171

*** Major revision of comment handling.

172
*** Major revision of fontification working with `jit-lock-mode'.
173

174 175
*** Cover reStructuredText syntax more closely.  Improve
the experience for Sphinx users.
176

177
*** `rst-insert-list' inserts new list or continues existing lists.
178

179
*** Extend correct and improve customization.
180 181 182

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

183
*** Reset window configuration after displaying TOC.
184

185
*** Package version in `rst-version'.
186

187 188
** 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'.
189

Chong Yidong's avatar
Chong Yidong committed
190 191 192 193 194 195 196 197 198
** 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.).

199 200
** Calendar

201 202
*** The calendars produced by cal-html include holidays.
Customize cal-html-holidays to change this.
203

204 205 206
** Customize

*** `custom-reset-button-menu' now defaults to t.
207

208 209 210 211
*** Non-option variables are never matched in `customize-apropos' and
`customize-apropos-options' (i.e. the prefix argument does nothing for
these commands now).

212
** erc will look up server/channel names via auth-source and use the
213
channel keys found, if any.
214

215 216 217 218 219 220
** 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").

221 222 223 224 225 226 227
** 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.

228 229
** The `server-auth-key' variable can be used to set a permanent
shared key for Emacs Server.
230 231 232 233

** 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
234 235
** FIXME something happened to ses.el, 2012-04-17.

236 237
** which-function-mode now applies to all applicable major modes by default.

238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267
** 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'.

268 269 270 271 272
+++
** notifications.el supports now version 1.2 of the Notifications API.
The function `notifications-get-capabilities' returns the supported
server properties.

273 274
** Tabulated List and packages derived from it

275
*** New command `tabulated-list-sort', bound to `S', sorts the column
276 277
at point, or the Nth column if a numeric prefix argument is given.

278 279 280 281 282 283 284 285 286 287 288 289
** 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
290 291
** Obsolete packages:

292 293 294 295 296
*** 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.

297 298
*** bruce.el

Glenn Morris's avatar
Glenn Morris committed
299 300
*** ledit.el

Glenn Morris's avatar
Glenn Morris committed
301
*** mailpost.el
302 303 304

*** mouse-sel.el

305 306
*** patcomp.el

307 308
*** cust-print.el

Glenn Morris's avatar
Glenn Morris committed
309 310 311 312

* New Modes and Packages in Emacs 24.2

* Incompatible Lisp Changes in Emacs 24.2
313 314 315 316 317 318 319

+++
** 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'.

320 321 322
** `face-spec-set' no longer sets frame-specific attributes when the
third argument is a frame (that usage was obsolete since Emacs 22.2).

323 324 325 326 327
+++
** 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.

328 329 330 331 332
** The following obsolete variables and varaliases have been removed:

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

Glenn Morris's avatar
Glenn Morris committed
333 334

* Lisp changes in Emacs 24.2
335

336 337 338 339 340
** `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'.

341 342 343 344
** New function `set-temporary-overlay-map'.

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

345
** New error type and new function `user-error'.  Doesn't trigger the debugger.
346

347 348 349
** The functions get-lru-window, get-mru-window and get-largest-window
now accept a third argument to avoid chosing the selected window.

350 351 352 353 354 355 356
** 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.
357 358 359 360 361 362

** 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.
363 364

** `automount-dir-prefix' is obsolete.
365
** `buffer-has-markers-at' is obsolete.
366 367 368 369 370 371 372 373

* 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.

374 375 376 377
** 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.

378

379
* Installation Changes in Emacs 24.1
Chong Yidong's avatar
Chong Yidong committed
380

381 382 383 384
** 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.
385

386 387 388 389
** 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.
390

391 392 393 394
** 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
395

396 397 398 399
** 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
400
This feature is not available for the Nextstep or MS ports.
401

402 403 404 405 406
** 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.

407 408 409 410
** 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
411
With it, Emacs integers typically have 62 bits, even on 32-bit machines.
412 413
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
414

415
** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
416 417 418
These provide no new functionality, they just remove the need to edit
lib-src/Makefile by hand in order to use the associated features.

419
** New configure option --enable-use-lisp-union-type.
420 421
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
422 423 424 425 426 427 428

** 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.

429

430
* Startup Changes in Emacs 24.1
431

432
** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
Glenn Morris's avatar
Glenn Morris committed
433 434
command line arguments, and the EMACS_UNIBYTE environment variable, no
longer have any effect.  (They were declared obsolete in Emacs 23.)
435

436
** New command line option `--no-site-lisp' removes site-lisp directories
437 438
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
439
Nextstep builds).
440

441

442
* Changes in Emacs 24.1
443

444
** Completion
445

446 447 448
*** Many packages now use the `completion-at-point' command,
rather than implementing separate completion commands.

449
*** `completion-at-point' now handles tags and semantic completion.
450

451 452
*** Completion in a non-minibuffer now tries to detect the end of completion
and pops down the *Completions* buffer accordingly.
453 454 455 456

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

*** New option `completion-category-overrides' for overriding the
457
default completion style in certain circumstances.
458

459
*** New completion style `substring'.
460 461 462 463

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

*** The option `widget-complete-field' has been removed.
464

465
** Mail changes
466

467 468 469 470 471 472
*** 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).
473

474 475 476
*** 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.
477

478 479
*** See Changes in Specialized Modes and Packages for SMTPmail changes
and Mail mode changes
Glenn Morris's avatar
Glenn Morris committed
480

Chong Yidong's avatar
Chong Yidong committed
481
** Emacs server and client changes
482

483
*** New option `server-port' specifies the port for TCP Emacs servers.
484

Chong Yidong's avatar
Chong Yidong committed
485
*** New emacsclient argument -q/--quiet suppresses some status messages.
486

487 488
*** New emacsclient argument --frame-parameters specifies the frame
parameters of any newly-created graphical frame.
489 490 491 492

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

Chong Yidong's avatar
Chong Yidong committed
493 494 495 496
*** 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.

497 498 499
** Internationalization changes

*** Emacs now supports display and editing of bidirectional text.
500 501
Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
displayed in the correct visual order as expected by users of those
502 503 504
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.
505

Chong Yidong's avatar
Chong Yidong committed
506
**** New buffer-local variable `bidi-display-reordering'.
507
To disable display reordering in a buffer, change this to nil.
508

Chong Yidong's avatar
Chong Yidong committed
509 510
**** New buffer-local variable `bidi-paragraph-direction'.
If nil (the default), Emacs determines the base direction of each
511 512 513
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.
514

515 516
Paragraphs with right-to-left base direction are displayed starting at
the right window edge.
517

518 519 520 521 522
*** 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.
523

524
*** New input methods: farsi, farsi-translit, bulgarian-alt-phonetic.
Chong Yidong's avatar
Chong Yidong committed
525

526 527 528
*** `nobreak-char-display' now also highlights Unicode hyphen chars
(U+2010 and U+2011).

529
*** New Hebrew translation of the Emacs Tutorial.
530 531 532
Type `C-u C-h t' to choose it in case your language setup doesn't
automatically select it.

533 534 535
** 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.
536

537 538
*** M-x list-packages shows a list of packages, which can be
selected for installation.
539

540
*** New command `describe-package', bound to `C-h P'.
541

542 543 544
*** 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
545

546 547
** Custom theme changes

548 549
*** New command `M-x customize-themes', which provides a convenient
interface for enabling and disabling Custom themes.
550

551
*** New option `custom-theme-load-path' is the load path for themes.
552 553 554 555 556 557
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.

558 559 560 561
*** 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.
562

563
** Improved GTK integration
564

565
*** GTK scroll-bars are now placed on the right by default.
566 567
The function `set-scroll-bar-mode' can change this.

568
*** GTK tool bars can have just text, just images or images and text.
569 570 571 572
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.
573 574 575
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.
576

577 578
*** The default colors for selected text (the `region' face) are taken
from the GTK theme when Emacs is built with GTK.
579

580 581
*** Emacs uses GTK tooltips by default if built with GTK.
You can disable this by changing `x-gtk-use-system-tooltips' to nil.
582

583 584 585 586 587 588 589 590 591 592 593 594 595
** 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

596
** Exiting changes
597

598
*** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
599 600
or if it receives a SIGINT signal in batch mode.

601 602 603
*** `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.
604

Chong Yidong's avatar
Chong Yidong committed
605
** Scrolling changes
606

Chong Yidong's avatar
Chong Yidong committed
607
*** New scrolling commands `scroll-up-command' and `scroll-down-command'
Juanma Barranquero's avatar
Juanma Barranquero committed
608
(bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
609
of buffer at first key-press (instead they move to top/bottom of buffer)
610
when `scroll-error-top-bottom' is non-nil.
611 612 613

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

Chong Yidong's avatar
Chong Yidong committed
614
*** New scrolling commands `scroll-up-line' and `scroll-down-line'
615
scroll a line instead of full screen.
616

Chong Yidong's avatar
Chong Yidong committed
617
*** New property `scroll-command' should be set on a command's symbol to
Esa Peuha's avatar
Esa Peuha committed
618
define it as a scroll command affected by `scroll-preserve-screen-position'.
619

Chong Yidong's avatar
Chong Yidong committed
620
*** If you customize `scroll-conservatively' to a value greater than 100,
621 622 623 624
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.
625

626
*** "Aggressive" scrolling now honors the scroll margins.
627 628 629 630 631
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.

632 633
** Basic SELinux support has been added.
This requires Emacs to be linked with libselinux at build time.
634

635 636 637 638
*** 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.
639

640
*** New functions `file-selinux-context' and `set-file-selinux-context'
641
get and set the SELinux context of a file.
642

643
** Trash changes
644

645 646
*** `delete-by-moving-to-trash' now only affects commands that specify
trashing.  This avoids inadvertently trashing temporary files.
647

648 649
*** Calling `delete-file' or `delete-directory' with a prefix argument
now forces true deletion, regardless of `delete-by-moving-to-trash'.
650

Chong Yidong's avatar
Chong Yidong committed
651
** File- and directory-local variable changes
652

Chong Yidong's avatar
Chong Yidong committed
653 654 655 656
*** 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.
657

Chong Yidong's avatar
Chong Yidong committed
658 659 660 661 662
*** 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.
663

Chong Yidong's avatar
Chong Yidong committed
664 665
*** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
Instead, use "eval: (minor-mode 1)".
Glenn Morris's avatar
Glenn Morris committed
666

Glenn Morris's avatar
Glenn Morris committed
667 668
*** The variable `inhibit-first-line-modes-regexps' has been renamed
to `inhibit-local-variables-regexps'.  As the name suggests, it now
669 670 671
applies to ALL file local variables, not just -*- lines.  The
associated `inhibit-first-line-modes-suffixes' has been renamed in the
corresponding way.
672

673 674
** Window changes

675 676 677
*** The `quit-window' command now restores the last buffer displayed
in the quitted window.

678 679 680 681
*** 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.
682

683 684 685 686 687 688 689 690 691 692
**** 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'.

693 694 695 696
*** 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.
697

698 699 700 701 702
*** 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.
703

704 705 706 707
*** 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.

708
*** New commands `maximize-window' and `minimize-window'.
Paul Eggert's avatar
Paul Eggert committed
709
These maximize and minimize the size of a window within its frame.
710 711 712 713 714

*** 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.

715
** Minibuffer changes
716

717
*** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
718 719
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
720

721
*** Minibuffers set `truncate-lines' to nil.
Glenn Morris's avatar
NEWS  
Glenn Morris committed
722
If you want to change the value to something else, you could use
723 724 725 726 727
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
728

729 730 731 732 733 734 735 736 737
** 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.

738

739
* Editing Changes in Emacs 24.1
740

741
** Search changes
742 743 744 745 746 747 748 749 750

*** 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'.

751
** New commands `count-words-region' and `count-words'.
752

753 754 755 756 757
*** 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
758

759
** The command `just-one-space' (M-SPC), if given a negative argument,
760 761
also deletes newlines around point.

762
** Deletion changes
763

764
*** New option `delete-active-region'.
765
If non-nil, [delete] and DEL delete the region if it is active and no
766
prefix argument is given.  If set to `kill', those commands kill
767
instead.
768

769
*** New command `delete-forward-char', bound to [delete].
770 771
This is meant for interactive use, and obeys `delete-active-region'.
The command `delete-char' does not obey `delete-active-region'.
772

773 774
*** `delete-backward-char' is now a Lisp function.
Apart from obeying `delete-active-region', its behavior is unchanged.
775 776
However, the byte compiler now warns if it is called from Lisp; Lisp
callers should use delete-char with a negative argument instead.
777

778 779
*** The option `mouse-region-delete-keys' has been deleted.

780 781
** Selection changes.

782 783 784 785
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.
786 787 788 789 790 791

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
792
the kill ring.  The selected text is put in the primary selection, if
793 794 795 796 797 798 799 800
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.

801 802
**** `mouse-drag-copy-region' now defaults to nil.

803 804 805
*** 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'.
806

807
*** `x-select-enable-clipboard' now defaults to t on all platforms.
808

809 810 811 812 813
*** `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
814
exactly equivalent to M-w, C-w, and C-y respectively.
815 816 817 818 819 820

**** 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:
821

822
**** Change `select-active-regions' to nil.
823 824 825 826
**** 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.
827

828
*** Support for X cut buffers has been removed.
829

830 831
*** X clipboard managers are now supported.
To inhibit this, change `x-select-enable-clipboard-manager' to nil.
832

833 834 835
** 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.
836

837
** `redisplay-dont-pause' now defaults to t.
838 839 840 841 842
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.

843 844 845 846 847 848
** 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).

849 850 851 852 853 854
** 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'.

855

856
* Changes in Specialized Modes and Packages in Emacs 24.1
857

Chong Yidong's avatar
Chong Yidong committed
858
** Archive Mode has basic support for browsing and updating 7z archives.
859

860
** BibTeX mode
861

862
*** BibTeX mode now supports biblatex.
863 864 865 866
Use the variable `bibtex-dialect' to select different BibTeX dialects.
`bibtex-entry-field-alist' is now an obsolete alias for
`bibtex-BibTeX-entry-alist'.

867 868
*** New command `bibtex-search-entries', bound to C-c C-a.

869
*** New `bibtex-entry-format' option `sort-fields', disabled by default.
870

871 872
*** New variable `bibtex-search-entry-globally'.

873
** Browse-url
874

875
*** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
876

877 878 879
*** 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
880 881
** Calendar, Diary, and Appt

882
*** Diary entries can contain non-printing "comments".
Glenn Morris's avatar
Glenn Morris committed
883 884
See the variable `diary-comment-start'.

885 886 887
*** Appointments can specify their individual warning times.
See the variable `appt-warning-time-regexp'.

888 889 890 891
*** 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.

892 893
*** New function `diary-hebrew-birthday'.

894 895 896
*** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
may no longer be nil, but must all be strings.

897 898 899
*** 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
900 901 902 903 904 905 906 907

*** 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
908
** CC Mode
909

Alan Mackenzie's avatar
Alan Mackenzie committed
910
*** New feature to "guess" the style in an existing buffer.
911
The main entry point is M-x c-guess.
Chong Yidong's avatar
Chong Yidong committed
912

Alan Mackenzie's avatar
Alan Mackenzie committed
913 914
*** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).

915
*** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
Alan Mackenzie's avatar
Alan Mackenzie committed
916 917 918
Thus C-M-a will, by default, go to the beginning of the immediate function,
not the top level.

919
*** "Macros with semicolons" can be registered for correct indentation.
Alan Mackenzie's avatar
Alan Mackenzie committed
920 921 922
Where such a macro ends a line (no semicolon) the next statement is no longer
parsed as a statement continuation.

923
** Comint and modes derived from it use the standard completion code.
Chong Yidong's avatar
Chong Yidong committed
924 925

** Compilation mode
926

927
*** Compilation mode can be used without Font Lock mode.
Chong Yidong's avatar
Chong Yidong committed
928 929
`compilation-parse-errors-function' is now obsolete.

930
*** New variable `compilation-filter-start', which is bound while
931 932
`compilation-filter-hook' runs.  It records the start position of the
text inserted by `compilation-filter'.
Chong Yidong's avatar
Chong Yidong committed
933

934 935
*** `compilation-error-screen-columns' and `compilation-first-column'
are obeyed in the editing buffer.  So programming language modes can
936 937
set them, whereas previously only the value in the *Compilation*
buffer was used.
938

939 940 941 942
** Customize

*** Customize buffers now contain a search field.
The search is performed using `customize-apropos'.
943
To turn off the search field, set `custom-search-field' to nil.
944 945 946 947 948 949 950

*** 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
951
choose a color via `list-colors-display'.
952

Chong Yidong's avatar
Chong Yidong committed
953 954
** D-Bus

Glenn Morris's avatar
Glenn Morris committed
955 956
*** It is now possible to access buses other than the default system
or session bus.
Chong Yidong's avatar
Chong Yidong committed
957

958
*** The `dbus-register-method' and `dbus-register-property' functions
Glenn Morris's avatar
Glenn Morris committed
959
optionally do not register names.
Chong Yidong's avatar
Chong Yidong committed
960

961
*** The new function `dbus-register-service' registers a known service
962
name on a D-Bus without also registering a property or a method.
Chong Yidong's avatar
Chong Yidong committed
963

964
** Dired-x
Michael Albinus's avatar
Michael Albinus committed
965