NEWS 75.7 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).

52 53 54 55 56
** The configuration option '--enable-use-lisp-union-type' has been
renamed to '--enable-check-lisp-object-type', as the resulting
Lisp_Object type no longer uses a union to implement the compile time
check that this option enables.

Glenn Morris's avatar
Glenn Morris committed
57 58

* Startup Changes in Emacs 24.2
59 60 61 62 63

** 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
64 65 66
---
** The `--no-site-lisp' command line option now works for Nextstep builds.

Glenn Morris's avatar
Glenn Morris committed
67 68 69

* Changes in Emacs 24.2

70 71 72 73 74 75 76 77 78 79 80 81
** Help changes

*** `C-h f' (describe-function) can now perform autoloading.
When this command is called for an autoloaded function whose docstring
contains a key substitution construct, that function's library is
automatically loaded, so that the documentation can be shown
correctly.  To disable this, set `help-enable-auto-load' to nil.

*** `C-h f' now reports previously-autoloaded functions as "autoloaded",
even after their associated libraries have been loaded (and the
autoloads have been redefined as functions).

82 83 84 85 86 87 88
** The function `current-time' now returns extended-format time stamps
(HIGH LOW USEC PSEC) that use picosecond resolution; the PSEC
component is new.  PSEC is typically a multiple of 1000 on current
machines.  Other functions that use this format, such as
file-attributes and format-time-string, have been changed accordingly.
Old-format time stamps are still accepted.

89 90 91
** 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
92 93 94
** If your Emacs was built from a bzr checkout, the new variable
`emacs-bzr-version' contains information about which bzr revision was used.

95 96 97
** 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
98 99
automatically at startup, or when customizing a relevant imagemagick-
option.
100 101

*** Setting `imagemagick-types-inhibit' to t now disables the use of
102 103
ImageMagick to view images.  You must call imagemagick-register-types
afterwards if you do not use customize to change this.
104

105
*** The new variable `imagemagick-enabled-types' also affects which
106 107 108
ImageMagick types are treated as images.  The function
`imagemagick-filter-types' returns the list of types that will be
treated as images.
109

110 111
*** Images displayed via ImageMagick now support transparency and the
:background image spec property.
112

Glenn Morris's avatar
Glenn Morris committed
113 114 115
** Face underlining can now use a wave.
See the "Face Attributes" section of the Elisp manual.

116 117
** New fringe bitmap exclamation-mark.

118 119 120 121
** 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.

122 123 124 125
+++
** You can prevent the creation of lock files by setting `create-lockfiles'
to nil.  Use with caution, and only if you really need to.

126
+++
127
** Using "unibyte: t" in Lisp source files is obsolete.
Glenn Morris's avatar
Glenn Morris committed
128
Use "coding: raw-text" instead.
129

130 131 132 133 134 135
** 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.

136 137 138
*** You can now click mouse-3 in the coding system indicator to
invokes `set-buffer-file-coding-system'.

139 140 141 142
+++
** Setting `enable-remote-dir-locals' to non-nil allows directory
local variables on remote hosts.

Chong Yidong's avatar
Chong Yidong committed
143
+++
144 145 146
** `insert-char' is now a command, and `ucs-insert' an obsolete alias
for it.

Glenn Morris's avatar
Glenn Morris committed
147 148

* Editing Changes in Emacs 24.2
149

150 151 152 153 154 155
** 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.

156 157 158
** M-x move-to-column, if called interactively with no prefix arg, now
prompts for a column number.

159 160 161
** `mouse-avoidance-banish-position' can now be used to customize
`mouse-avoidance-mode' further.

162 163
** `M-=' is now bound to `count-words', not `count-words-region'.

164 165 166
** `C-M-f' and `C-M-b' will now move to the path name separator
character when doing minibuffer filename prompts.

167 168
** `goto-char' is now bound to `M-g c'.

169 170 171
** New command `C-x r M-w' (copy-rectangle-as-kill).
It copies the region-rectangle as the last rectangle kill.

172 173
** New input method `vietnamese-vni'.

Glenn Morris's avatar
Glenn Morris committed
174 175

* Changes in Specialized Modes and Packages in Emacs 24.2
176

Julien Danjou's avatar
Julien Danjou committed
177 178 179 180
** Term changes

The variables `term-default-fg-color' and `term-default-bg-color' are
now deprecated in favor of the `term-face' face, that you can
Paul Eggert's avatar
Paul Eggert committed
181 182
customize.  Also, it is now possible to customize how are displayed the
ANSI terminal colors and styles by customizing the corresponding
Julien Danjou's avatar
Julien Danjou committed
183 184 185
`term-color-<COLOR>', `term-color-underline' and `term-color-bold'
faces.

186 187 188 189 190 191 192 193 194 195 196 197
** 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.

Chong Yidong's avatar
Chong Yidong committed
198 199 200 201 202
** Desktop

*** `desktop-path' no longer includes the "." directory.  Desktop
files are now located in ~/.emacs.d by default.

Glenn Morris's avatar
Glenn Morris committed
203 204 205
** Python mode

A new version of python.el, which provides several new features, including:
206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257
per-buffer shells, better indentation, Python 3 support, and improved
shell-interaction compatible with iPython (and virtually any other
text based shell).

*** Some user options have been replaced/renamed:
Old defcustom:                | New defcustom:
python-indent                 | python-indent-offset
python-guess-indent           | python-indent-guess-indent-offset
python-pdbtrack-do-tracking-p | python-pdbtrack-activate
python-use-skeletons          | python-skeleton-autoinsert

*** Some user options have been removed:

**** `python-indent-string-contents': Strings are never indented.

**** `python-honour-comment-indentation':
Comments are never considered as indentation markers themselves.

**** `python-continuation-offset': Indentation is automatically
calculated in a pep8 compliant way depending on the context.

**** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
Have no direct mapping as the shell interaction is completely different.

**** `python-python-command', `python-jython-command':
Replaced by `python-shell-interpreter'.

**** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
`python-pdbtrack-minor-mode-string', `python-source-modes':
No longer relevant.

*** Some commands have been replaced:
Old command               | New command
python-insert-class       | python-skeleton-class
python-insert-def         | python-skeleton-def
python-insert-for         | python-skeleton-for
python-insert-if          | python-skeleton-if
python-insert-try/except  | python-skeleton-try
python-insert-try/finally | python-skeleton-try
python-insert-while       | python-skeleton-while
python-find-function      | python-nav-jump-to-defun
python-next-statement     | python-nav-forward-sentence
python-previous-statement | python-nav-backward-sentence
python-send-buffer        | python-shell-send-buffer
python-send-defun         | python-shell-send-defun
python-send-region        | python-shell-send-region
python-send-region-and-go | Emulate with python-shell-send-region and
                            python-shell-switch-to-shell
python-send-string        | python-shell-send-string
python-switch-to-python   | python-shell-switch-to-shell
python-describe-symbol    | python-eldoc-at-point

Glenn Morris's avatar
Glenn Morris committed
258 259 260 261 262 263 264 265 266
** VHDL mode

*** The free software compiler GHDL is supported (and now the default).

*** Support for the VHDL-AMS packages has been added/updated.

*** Updated to the 2002 revision of the VHDL standard.

*** Accepts \r and \f as whitespace.
267

268 269 270 271 272 273 274 275 276 277 278
** 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.

279 280 281
** Ediff now uses the same color scheme as Diff mode
on high color displays.

282 283 284 285
** Flymake uses fringe bitmaps to indicate errors and warnings.
See flymake-fringe-indicator-position, flymake-error-bitmap and
flymake-warning-bitmap.

286 287 288 289 290
** `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.

291 292
** reStructuredText mode

293 294
*** Rebind nearly all keys making room for more keys and complying
better to usage in other modes.  Describe bindings with C-c C-h.
295

296 297
*** Major revision of indentation working very similar to other
modes.  TAB is your friend.
298

299 300
*** Major revision of filling working fine with most of
reStructuredText syntax.  Support auto-filling.
301 302 303

*** Major revision of comment handling.

304
*** Major revision of fontification working with `jit-lock-mode'.
305

306 307
*** Cover reStructuredText syntax more closely.  Improve
the experience for Sphinx users.
308

309
*** `rst-insert-list' inserts new list or continues existing lists.
310

311
*** Extend correct and improve customization.
312 313 314

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

315
*** Reset window configuration after displaying TOC.
316

317
*** Package version in `rst-version'.
318

319 320
** 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'.
321

Chong Yidong's avatar
Chong Yidong committed
322 323 324 325 326 327 328 329 330
** 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.).

331 332 333 334 335 336
** 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.

337 338
** Calendar

339 340
*** The calendars produced by cal-html include holidays.
Customize cal-html-holidays to change this.
341

342 343 344
** Customize

*** `custom-reset-button-menu' now defaults to t.
345

346 347 348 349
*** Non-option variables are never matched in `customize-apropos' and
`customize-apropos-options' (i.e. the prefix argument does nothing for
these commands now).

350
** erc will look up server/channel names via auth-source and use the
351
channel keys found, if any.
352

353 354 355 356
** Dired

*** `dired-do-async-shell-command' executes each file sequentially
if the command ends in `;' (when operating on multiple files).
Paul Eggert's avatar
Paul Eggert committed
357
Otherwise, it executes the command on each file in parallel.
358

359 360 361 362 363 364
** 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").

365 366 367 368 369 370 371
** 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.

372 373
** The `server-auth-key' variable can be used to set a permanent
shared key for Emacs Server.
374 375 376 377

** 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
378 379
** FIXME something happened to ses.el, 2012-04-17.

380 381
** which-function-mode now applies to all applicable major modes by default.

Michael Albinus's avatar
Michael Albinus committed
382 383 384 385 386 387 388 389 390
** 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.

391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420
** 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'.

421 422 423 424 425
+++
** notifications.el supports now version 1.2 of the Notifications API.
The function `notifications-get-capabilities' returns the supported
server properties.

426 427 428 429 430
** Package Menu

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

431 432
** Tabulated List and packages derived from it

433
*** New command `tabulated-list-sort', bound to `S', sorts the column
434 435
at point, or the Nth column if a numeric prefix argument is given.

436 437 438 439 440 441 442 443 444 445 446 447
** 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
448 449
** Obsolete packages:

450 451 452 453 454
*** 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.

455 456
*** bruce.el

Glenn Morris's avatar
Glenn Morris committed
457 458
*** ledit.el

Glenn Morris's avatar
Glenn Morris committed
459
*** mailpost.el
460 461 462

*** mouse-sel.el

463 464
*** patcomp.el

465 466
*** cust-print.el

Glenn Morris's avatar
Glenn Morris committed
467 468 469 470

* New Modes and Packages in Emacs 24.2

* Incompatible Lisp Changes in Emacs 24.2
471 472 473 474 475 476 477

+++
** 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'.

478 479 480 481 482 483
+++
** The return values of `defalias', `defun' and `defmacro' have changed,
and are now undefined.  For backwards compatibility, defun and
defmacro currently return the name of the newly defined function/macro
but this should not be relied upon.

484 485 486
** `face-spec-set' no longer sets frame-specific attributes when the
third argument is a frame (that usage was obsolete since Emacs 22.2).

487 488 489 490 491
+++
** 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.

492 493 494 495
** The following obsolete variables and varaliases have been removed:

*** `facemenu-unlisted-faces'
*** `rmail-decode-mime-charset'
Chong Yidong's avatar
Chong Yidong committed
496
*** `last-input-char' and `last-command-char'
497

Glenn Morris's avatar
Glenn Morris committed
498 499

* Lisp changes in Emacs 24.2
500

501 502 503
** `toggle-read-only' accepts a second argument specifying whether to
print a message, if called from Lisp.

504 505 506
** CL-style generalized variables are now in core Elisp.
`setf' is autoloaded and `push' and `pop' accept generalized variables.

507 508 509 510 511
** `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'.

512 513 514 515
** New function `set-temporary-overlay-map'.

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

516
** New error type and new function `user-error'.  Doesn't trigger the debugger.
517

518
** The functions get-lru-window, get-mru-window and get-largest-window
Paul Eggert's avatar
Paul Eggert committed
519
now accept a third argument to avoid choosing the selected window.
520

521 522 523 524 525 526 527
** 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.
528 529 530 531 532 533

** 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.
534

Glenn Morris's avatar
Glenn Morris committed
535 536
** New function file-name-base.

537 538
** New function `tty-top-frame' returns the topmost frame of a text terminal.

539
** `automount-dir-prefix' is obsolete.
540
** `buffer-has-markers-at' is obsolete.
541 542 543 544 545 546 547 548

* 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.

549 550 551 552
** 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.

553

554
* Installation Changes in Emacs 24.1
Chong Yidong's avatar
Chong Yidong committed
555

556 557 558 559
** 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.
560

561 562 563 564
** 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.
565

566 567 568 569
** 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
570

571 572 573 574
** 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
575
This feature is not available for the Nextstep or MS ports.
576

577 578 579 580 581
** 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.

582 583 584 585
** 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
586
With it, Emacs integers typically have 62 bits, even on 32-bit machines.
587 588
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
589

590
** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
591 592 593
These provide no new functionality, they just remove the need to edit
lib-src/Makefile by hand in order to use the associated features.

594
** New configure option --enable-use-lisp-union-type.
595 596
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
597 598 599 600 601 602 603

** 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.

604

605
* Startup Changes in Emacs 24.1
606

607
** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
Glenn Morris's avatar
Glenn Morris committed
608 609
command line arguments, and the EMACS_UNIBYTE environment variable, no
longer have any effect.  (They were declared obsolete in Emacs 23.)
610

611
** New command line option `--no-site-lisp' removes site-lisp directories
612 613
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
614
Nextstep builds).
615

616

617
* Changes in Emacs 24.1
618

619
** Completion
620

621 622 623
*** Many packages now use the `completion-at-point' command,
rather than implementing separate completion commands.

624
*** `completion-at-point' now handles tags and semantic completion.
625

626 627
*** Completion in a non-minibuffer now tries to detect the end of completion
and pops down the *Completions* buffer accordingly.
628 629 630 631

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

*** New option `completion-category-overrides' for overriding the
632
default completion style in certain circumstances.
633

634
*** New completion style `substring'.
635 636 637 638

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

*** The option `widget-complete-field' has been removed.
639

640
** Mail changes
641

642 643 644 645 646 647
*** 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).
648

649 650 651
*** 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.
652

653 654
*** See Changes in Specialized Modes and Packages for SMTPmail changes
and Mail mode changes
Glenn Morris's avatar
Glenn Morris committed
655

Chong Yidong's avatar
Chong Yidong committed
656
** Emacs server and client changes
657

658
*** New option `server-port' specifies the port for TCP Emacs servers.
659

Chong Yidong's avatar
Chong Yidong committed
660
*** New emacsclient argument -q/--quiet suppresses some status messages.
661

662 663
*** New emacsclient argument --frame-parameters specifies the frame
parameters of any newly-created graphical frame.
664 665 666 667

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

Chong Yidong's avatar
Chong Yidong committed
668 669 670 671
*** 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.

672 673 674
** Internationalization changes

*** Emacs now supports display and editing of bidirectional text.
675 676
Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
displayed in the correct visual order as expected by users of those
677 678 679
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.
680

Chong Yidong's avatar
Chong Yidong committed
681
**** New buffer-local variable `bidi-display-reordering'.
682
To disable display reordering in a buffer, change this to nil.
683

Chong Yidong's avatar
Chong Yidong committed
684 685
**** New buffer-local variable `bidi-paragraph-direction'.
If nil (the default), Emacs determines the base direction of each
686 687 688
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.
689

690 691
Paragraphs with right-to-left base direction are displayed starting at
the right window edge.
692

693 694 695 696 697
*** 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.
698

Glenn Morris's avatar
Glenn Morris committed
699 700
*** New input methods for Farsi and Bulgarian
(farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
Chong Yidong's avatar
Chong Yidong committed
701

702 703 704
*** `nobreak-char-display' now also highlights Unicode hyphen chars
(U+2010 and U+2011).

705
*** New Hebrew translation of the Emacs Tutorial.
706 707 708
Type `C-u C-h t' to choose it in case your language setup doesn't
automatically select it.

709 710 711
** 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.
712

713 714
*** M-x list-packages shows a list of packages, which can be
selected for installation.
715

716
*** New command `describe-package', bound to `C-h P'.
717

718 719 720
*** 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
721

722 723
** Custom theme changes

724 725
*** New command `M-x customize-themes', which provides a convenient
interface for enabling and disabling Custom themes.
726

727
*** New option `custom-theme-load-path' is the load path for themes.
728 729 730 731 732 733
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.

734 735 736 737
*** 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.
738

739
** Improved GTK integration
740

741
*** GTK scroll-bars are now placed on the right by default.
742 743
The function `set-scroll-bar-mode' can change this.

744
*** GTK tool bars can have just text, just images or images and text.
745 746 747 748
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.
749 750 751
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.
752

753 754
*** The default colors for selected text (the `region' face) are taken
from the GTK theme when Emacs is built with GTK.
755

756 757
*** Emacs uses GTK tooltips by default if built with GTK.
You can disable this by changing `x-gtk-use-system-tooltips' to nil.
758

759 760 761 762 763 764 765 766 767 768 769 770 771
** 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

772
** Exiting changes
773

774
*** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
775 776
or if it receives a SIGINT signal in batch mode.

777 778 779
*** `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.
780

Chong Yidong's avatar
Chong Yidong committed
781
** Scrolling changes
782

Chong Yidong's avatar
Chong Yidong committed
783
*** New scrolling commands `scroll-up-command' and `scroll-down-command'
Juanma Barranquero's avatar
Juanma Barranquero committed
784
(bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
785
of buffer at first key-press (instead they move to top/bottom of buffer)
786
when `scroll-error-top-bottom' is non-nil.
787 788 789

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

Chong Yidong's avatar
Chong Yidong committed
790
*** New scrolling commands `scroll-up-line' and `scroll-down-line'
791
scroll a line instead of full screen.
792

Chong Yidong's avatar
Chong Yidong committed
793
*** New property `scroll-command' should be set on a command's symbol to
Esa Peuha's avatar
Esa Peuha committed
794
define it as a scroll command affected by `scroll-preserve-screen-position'.
795

Chong Yidong's avatar
Chong Yidong committed
796
*** If you customize `scroll-conservatively' to a value greater than 100,
797 798 799 800
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.
801

802
*** "Aggressive" scrolling now honors the scroll margins.
803 804 805 806 807
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.

808 809
** Basic SELinux support has been added.
This requires Emacs to be linked with libselinux at build time.
810

811 812 813 814
*** 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.
815

816
*** New functions `file-selinux-context' and `set-file-selinux-context'
817
get and set the SELinux context of a file.
818

819
** Trash changes
820

821 822
*** `delete-by-moving-to-trash' now only affects commands that specify
trashing.  This avoids inadvertently trashing temporary files.
823

824 825
*** Calling `delete-file' or `delete-directory' with a prefix argument
now forces true deletion, regardless of `delete-by-moving-to-trash'.
826

Chong Yidong's avatar
Chong Yidong committed
827
** File- and directory-local variable changes
828

Chong Yidong's avatar
Chong Yidong committed
829 830 831 832
*** 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.
833

Chong Yidong's avatar
Chong Yidong committed
834 835 836 837 838
*** 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.
839

Chong Yidong's avatar
Chong Yidong committed
840 841
*** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
Instead, use "eval: (minor-mode 1)".
Glenn Morris's avatar
Glenn Morris committed
842

Glenn Morris's avatar
Glenn Morris committed
843 844
*** The variable `inhibit-first-line-modes-regexps' has been renamed
to `inhibit-local-variables-regexps'.  As the name suggests, it now
845 846 847
applies to ALL file local variables, not just -*- lines.  The
associated `inhibit-first-line-modes-suffixes' has been renamed in the
corresponding way.
848

849 850
** Window changes

851 852 853
*** The `quit-window' command now restores the last buffer displayed
in the quitted window.

854 855 856 857
*** 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.
858

859 860 861 862 863 864 865 866 867 868
**** 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'.

869 870 871 872
*** 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.
873

874 875 876 877 878
*** 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.
879

880 881 882 883
*** 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.

884
*** New commands `maximize-window' and `minimize-window'.
Paul Eggert's avatar
Paul Eggert committed
885
These maximize and minimize the size of a window within its frame.
886 887 888 889 890

*** 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.

891
** Minibuffer changes
892

893
*** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
894 895
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
896

897
*** Minibuffers set `truncate-lines' to nil.
Glenn Morris's avatar
NEWS  
Glenn Morris committed
898
If you want to change the value to something else, you could use
899 900 901 902 903
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
904

905 906 907 908 909 910 911 912 913
** 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.

914

915
* Editing Changes in Emacs 24.1
916

917
** Search changes
918 919 920 921 922 923 924 925 926

*** 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'.

927
** New commands `count-words-region' and `count-words'.
928

929 930 931 932 933
*** 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
934

935
** The command `just-one-space' (M-SPC), if given a negative argument,
936 937
also deletes newlines around point.

938
** Deletion changes
939

940
*** New option `delete-active-region'.
941
If non-nil, [delete] and DEL delete the region if it is active and no
942
prefix argument is given.  If set to `kill', those commands kill
943
instead.
944

945
*** New command `delete-forward-char', bound to [delete].
946 947
This is meant for interactive use, and obeys `delete-active-region'.
The command `delete-char' does not obey `delete-active-region'.
948

949 950
*** `delete-backward-char' is now a Lisp function.
Apart from obeying `delete-active-region', its behavior is unchanged.
951 952
However, the byte compiler now warns if it is called from Lisp; Lisp
callers should use delete-char with a negative argument instead.
953

954 955
*** The option `mouse-region-delete-keys' has been deleted.

956 957
** Selection changes.

958 959 960 961
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.
962 963 964 965 966 967

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
968
the kill ring.  The selected text is put in the primary selection, if
969 970 971 972 973 974 975 976
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.

977 978
**** `mouse-drag-copy-region' now defaults to nil.

979 980 981
*** 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'.
982

983
*** `x-select-enable-clipboard' now defaults to t on all platforms.
984

985 986 987 988 989
*** `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
990
exactly equivalent to M-w, C-w, and C-y respectively.
991 992 993 994 995 996

**** 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:
997

998
**** Change `select-active-regions' to nil.
999 1000 1001 1002
**** 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.
1003

1004
*** Support for X cut buffers has been removed.
1005

1006 1007
*** X clipboard managers are now supported.
To inhibit this, change `x-select-enable-clipboard-manager' to nil.
1008

1009 1010 1011
** 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.
1012

1013
** `redisplay-dont-pause' now defaults to t.
1014 1015 1016 1017 1018
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.

1019 1020 1021 1022 1023 1024
** 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).

1025 1026 1027 1028 1029 1030
** 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'.

1031

1032
* Changes in Specialized Modes and Packages in Emacs 24.1
1033

Chong Yidong's avatar
Chong Yidong committed
1034
** Archive Mode has basic support for browsing and updating 7z archives.