NEWS 80.3 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
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.


24
* Installation Changes in Emacs 24.3
25

Paul Eggert's avatar
Paul Eggert committed
26
** New configure option '--without-all' to disable additional features.
27 28 29 30 31
This disables most of the features that are normally enabled by default.

** New configure option '--enable-link-time-optimization' to utilize
an appropriate feature provided by GCC since version 4.5.0.

32 33 34 35
** 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
36
may be useful.
37

38 39 40
** The configure option '--disable-maintainer-mode' has been removed,
as it was confusingly-named and rarely useful.

41 42 43 44 45
---
** You can use `NO_BIN_LINK=t make install' to prevent the installation
overwriting "emacs" in the installation bin/ directory with a link
to emacs-VERSION.

46 47 48
---
** Emacs uses libtinfo in preference to libncurses, if available.

49 50 51 52 53
---
** 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.

54 55 56 57
---
** 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
58 59 60 61 62
---
** 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).

63 64 65 66 67
** 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
68

69
* Startup Changes in Emacs 24.3
70 71 72 73 74

** 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
75 76 77
---
** The `--no-site-lisp' command line option now works for Nextstep builds.

Glenn Morris's avatar
Glenn Morris committed
78

79
* Changes in Emacs 24.3
Glenn Morris's avatar
Glenn Morris committed
80

81 82 83 84 85 86 87 88 89 90 91 92
** 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).

93 94 95 96 97 98 99
** 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.

100 101 102
** 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
103 104 105
** If your Emacs was built from a bzr checkout, the new variable
`emacs-bzr-version' contains information about which bzr revision was used.

106 107 108
** 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
109 110
automatically at startup, or when customizing a relevant imagemagick-
option.
111 112

*** Setting `imagemagick-types-inhibit' to t now disables the use of
113 114
ImageMagick to view images.  You must call imagemagick-register-types
afterwards if you do not use customize to change this.
115

116
*** The new variable `imagemagick-enabled-types' also affects which
117 118 119
ImageMagick types are treated as images.  The function
`imagemagick-filter-types' returns the list of types that will be
treated as images.
120

121 122
*** Images displayed via ImageMagick now support transparency and the
:background image spec property.
123

124 125
** Internationalization changes

126
*** New language environment: Persian.
127

Glenn Morris's avatar
Glenn Morris committed
128 129 130
** Face underlining can now use a wave.
See the "Face Attributes" section of the Elisp manual.

131 132
** New fringe bitmap exclamation-mark.

133 134 135 136
** 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.

137 138 139 140
+++
** You can prevent the creation of lock files by setting `create-lockfiles'
to nil.  Use with caution, and only if you really need to.

141
+++
142
** Using "unibyte: t" in Lisp source files is obsolete.
Glenn Morris's avatar
Glenn Morris committed
143
Use "coding: raw-text" instead.
144

145 146 147 148 149 150
** 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.

151 152 153
*** You can now click mouse-3 in the coding system indicator to
invokes `set-buffer-file-coding-system'.

154 155 156 157
+++
** Setting `enable-remote-dir-locals' to non-nil allows directory
local variables on remote hosts.

Chong Yidong's avatar
Chong Yidong committed
158
+++
159 160 161
** `insert-char' is now a command, and `ucs-insert' an obsolete alias
for it.

Chong Yidong's avatar
Chong Yidong committed
162 163 164
** The entry for PCL-CVS has been removed from the Tools menu.
The PCL-CVS commands are still available via the keyboard.

Glenn Morris's avatar
Glenn Morris committed
165

166
* Editing Changes in Emacs 24.3
167

168 169 170 171
** New option `yank-handled-properties' allows processing of text
properties on yanked text, in more ways that are more general than
just removing them, as done by `yank-excluded-properties'.

Juanma Barranquero's avatar
Juanma Barranquero committed
172 173
** New option `delete-trailing-lines' specifies whether the M-x
delete-trailing-whitespace command should delete trailing lines at the
174 175
end of the buffer.  It defaults to t.

176 177 178 179 180 181
** 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.

182 183 184 185 186 187 188
*** `search-whitespace-regexp' now acts on ordinary incremental search
as well, so that each sequence of spaces in the search string matches
any combination of one or more whitespace characters.  To change this
behavior, you can give `search-whitespace-regexp' a cons cell value,
where the car and cdr specify values for ordinary and regular
expression incremental search respectively.

189 190 191
** M-x move-to-column, if called interactively with no prefix arg, now
prompts for a column number.

192 193 194
** `mouse-avoidance-banish-position' can now be used to customize
`mouse-avoidance-mode' further.

195
** `C-u M-=' now counts lines/words/characters in the entire buffer.
196

197 198 199
** `C-M-f' and `C-M-b' will now move to the path name separator
character when doing minibuffer filename prompts.

200 201
** `goto-char' is now bound to `M-g c'.

202 203 204
** New command `C-x r M-w' (copy-rectangle-as-kill).
It copies the region-rectangle as the last rectangle kill.

205 206
** New input method `vietnamese-vni'.

Glenn Morris's avatar
Glenn Morris committed
207

208
* Changes in Specialized Modes and Packages in Emacs 24.3
209

210 211
** Compilation has a new `compilation-always-kill' configuration variable.

Julien Danjou's avatar
Julien Danjou committed
212 213 214 215
** 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
216 217
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
218 219 220
`term-color-<COLOR>', `term-color-underline' and `term-color-bold'
faces.

221 222
** CL
*** CL's main entry is now (require 'cl-lib).
223
`cl-lib' is like the old `cl' except that it uses the namespace cleanly,
224 225
i.e. all its definitions have the "cl-" prefix (and internal definitions use
the "cl--" prefix).
226 227 228 229 230 231

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'.

232
The old `cl' is now deprecated and is just a bunch of aliases that
233 234
provide the old non-prefixed names.

235 236 237 238 239 240 241 242 243 244 245 246
*** `cl-flet' is not like `flet' (which is deprecated).
Instead it obeys the behavior of Common-Lisp's `flet'.

*** `cl-labels' is slightly different from `labels'.
The difference is that it relies on the `lexical-binding' machinery (as opposed
to the `lexical-let' machinery used previously) to capture definitions in
closures, so such closures will only work if `lexical-binding' is in use.

*** `progv' was rewritten to use the `let' machinery.
A side effect is that vars without corresponding value are bound to nil
rather than making them unbound.

Chong Yidong's avatar
Chong Yidong committed
247 248 249 250 251
** 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
252 253 254
** Python mode

A new version of python.el, which provides several new features, including:
255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306
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
307 308 309 310 311 312 313 314 315
** 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.
316

317 318 319 320 321 322 323 324 325 326 327
** 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.

328 329 330
** Ediff now uses the same color scheme as Diff mode
on high color displays.

331 332 333 334
** Flymake uses fringe bitmaps to indicate errors and warnings.
See flymake-fringe-indicator-position, flymake-error-bitmap and
flymake-warning-bitmap.

335 336 337 338 339
** `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.

340 341
** reStructuredText mode

342 343
*** Rebind nearly all keys making room for more keys and complying
better to usage in other modes.  Describe bindings with C-c C-h.
344

345 346
*** Major revision of indentation working very similar to other
modes.  TAB is your friend.
347

348 349
*** Major revision of filling working fine with most of
reStructuredText syntax.  Support auto-filling.
350 351 352

*** Major revision of comment handling.

353
*** Major revision of fontification working with `jit-lock-mode'.
354

355 356
*** Cover reStructuredText syntax more closely.  Improve
the experience for Sphinx users.
357

358
*** `rst-insert-list' inserts new list or continues existing lists.
359

360
*** Extend correct and improve customization.
361 362 363

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

364
*** Reset window configuration after displaying TOC.
365

366
*** Package version in `rst-version'.
367

368 369
** 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'.
370

Chong Yidong's avatar
Chong Yidong committed
371 372 373 374 375 376 377 378 379
** 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.).

380 381 382 383 384 385
** 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.

386 387
** Calendar

388 389
*** The calendars produced by cal-html include holidays.
Customize cal-html-holidays to change this.
390

391 392 393
** Customize

*** `custom-reset-button-menu' now defaults to t.
394

395 396 397 398
*** Non-option variables are never matched in `customize-apropos' and
`customize-apropos-options' (i.e. the prefix argument does nothing for
these commands now).

399
** erc will look up server/channel names via auth-source and use the
400
channel keys found, if any.
401

402 403 404 405
** 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
406
Otherwise, it executes the command on each file in parallel.
407

408 409 410 411 412 413
** Shell

*** New option `async-shell-command-buffer' specifies what buffer to use
for a new asynchronous shell command when the default output buffer
`*Async Shell Command*' is already taken by another running command.

414 415 416 417 418 419
** 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").

420 421 422 423 424 425 426
** 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.

427 428
** The `server-auth-key' variable can be used to set a permanent
shared key for Emacs Server.
429 430 431 432

** 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
433 434
** FIXME something happened to ses.el, 2012-04-17.

435 436
** which-function-mode now applies to all applicable major modes by default.

Michael Albinus's avatar
Michael Albinus committed
437 438 439 440 441 442 443 444 445
** 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.

446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475
** 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'.

476 477 478 479 480
+++
** notifications.el supports now version 1.2 of the Notifications API.
The function `notifications-get-capabilities' returns the supported
server properties.

481 482 483 484 485
** Package Menu

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

486 487
** Tabulated List and packages derived from it

488
*** New command `tabulated-list-sort', bound to `S', sorts the column
489 490
at point, or the Nth column if a numeric prefix argument is given.

491 492 493 494 495 496 497 498 499 500 501 502
** 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
503 504
** Obsolete packages:

505 506 507 508 509
*** 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.

510 511
*** bruce.el

Glenn Morris's avatar
Glenn Morris committed
512 513
*** ledit.el

Glenn Morris's avatar
Glenn Morris committed
514
*** mailpost.el
515 516 517

*** mouse-sel.el

518 519
*** patcomp.el

520 521
*** cust-print.el

Glenn Morris's avatar
Glenn Morris committed
522

523
* New Modes and Packages in Emacs 24.3
Glenn Morris's avatar
Glenn Morris committed
524

525
* Incompatible Lisp Changes in Emacs 24.3
526

527 528 529 530
** The function `x-select-font' can return a font spec, instead of a
font name as a string.  Whether it returns a font spec or a font name
depends on the graphical library.

531 532 533 534
** If the NEWTEXT arg to `replace-match' contains a substring "\?",
that substring is inserted literally even if the LITERAL arg is
non-nil, instead of causing an error to be signaled.

535 536 537 538 539 540
+++
** 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'.

541 542 543 544 545 546
+++
** 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.

547 548 549
** `face-spec-set' no longer sets frame-specific attributes when the
third argument is a frame (that usage was obsolete since Emacs 22.2).

550 551 552 553 554
+++
** 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.

555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583
** Spelling changes.
Some Lisp symbols have been renamed to avoid problems with spelling
that is incorrect or inconsistent with how Emacs normally spells a word.

*** Renamed functions

**** hangul-input-method-inactivate -> hangul-input-method-deactivate
**** inactivate-input-method -> deactivate-input-method
**** quail-inactivate -> quail-deactivate
**** robin-inactivate -> robin-deactivate
**** viper-inactivate-input-method -> viper-deactivate-input-method
**** viper-inactivate-input-method-action ->
     viper-deactivate-input-method-action
**** ucs-input-inactivate -> ucs-input-deactivate

*** Renamed hooks
The old hooks are still supported for backward compatibility, but they
are deprecated and will be removed eventually.

**** input-method-inactivate-hook -> input-method-deactivate-hook
**** robin-inactivate-hook -> robin-deactivate-hook
**** quail-inactivate-hook -> quail-deactivate-hook

*** Renamed Lisp variables

**** follow-deactive-menu -> follow-inactive-menu
**** inactivate-current-input-method-function ->
     deactivate-current-input-method-function

584 585 586 587
** The following obsolete variables and varaliases have been removed:

*** `facemenu-unlisted-faces'
*** `rmail-decode-mime-charset'
Chong Yidong's avatar
Chong Yidong committed
588
*** `last-input-char' and `last-command-char'
589

Glenn Morris's avatar
Glenn Morris committed
590

591
* Lisp changes in Emacs 24.3
592

593 594
** New minor mode `read-only-mode' to replace toggle-read-only (now obsolete).

595 596
** New functions `autoloadp' and `autoload-do-load'.

597 598
** New function `posnp' to test if an object is a `posn'.

599 600
** `function-get' fetches the property of a function, following aliases.

601 602 603
** `toggle-read-only' accepts a second argument specifying whether to
print a message, if called from Lisp.

604 605 606
** CL-style generalized variables are now in core Elisp.
`setf' is autoloaded and `push' and `pop' accept generalized variables.

607 608 609 610 611
** `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'.

612 613 614 615
** New function `set-temporary-overlay-map'.

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

616
** New error type and new function `user-error'.  Doesn't trigger the debugger.
617

618 619 620
** Window changes

*** The functions get-lru-window, get-mru-window and get-largest-window
Paul Eggert's avatar
Paul Eggert committed
621
now accept a third argument to avoid choosing the selected window.
622

623 624 625
*** New display action alist `inhibit-switch-frame', if non-nil, tells
display action functions to avoid changing which frame is selected.

626 627 628
*** New display action alist `pop-up-frame-parameters', if non-nil,
specifies frame parameters to give any newly-created frame.

629 630 631 632 633 634 635 636 637 638
*** The following variables are obsolete, as they can be replaced by
appropriate entries in the `display-buffer-alist' function introduced
in Emacs 24.1:

**** `display-buffer-reuse-frames'
**** `special-display-regexps'
**** `special-display-frame-alist'
**** `special-display-buffer-names'
**** `special-display-function'

639 640 641 642 643 644 645
** 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.
646 647 648 649 650 651

** 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.
652

Glenn Morris's avatar
Glenn Morris committed
653 654
** New function file-name-base.

655 656
** New function `tty-top-frame' returns the topmost frame of a text terminal.

657
** `automount-dir-prefix' is obsolete.
658
** `buffer-has-markers-at' is obsolete.
659

660
* Changes in Emacs 24.3 on non-free operating systems
661 662 663 664 665 666

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

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

667 668 669 670
** 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.

671
** On MS-Windows Vista and later Emacs now supports symbolic links.
672 673 674

* Changes in Emacs 24.2

Glenn Morris's avatar
Glenn Morris committed
675
** This is mainly a bug-fix release.
676

677

678
* Installation Changes in Emacs 24.1
Chong Yidong's avatar
Chong Yidong committed
679

680 681 682 683
** 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.
684

685 686 687 688
** 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.
689

690 691 692 693
** 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
694

695 696 697 698
** 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
699
This feature is not available for the Nextstep or MS ports.
700

701 702 703 704 705
** 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.

706 707 708 709
** 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
710
With it, Emacs integers typically have 62 bits, even on 32-bit machines.
711 712
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
713

714
** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
715 716 717
These provide no new functionality, they just remove the need to edit
lib-src/Makefile by hand in order to use the associated features.

718
** New configure option --enable-use-lisp-union-type.
719 720
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
721 722 723 724 725 726 727

** 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.

728

729
* Startup Changes in Emacs 24.1
730

731
** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
Glenn Morris's avatar
Glenn Morris committed
732 733
command line arguments, and the EMACS_UNIBYTE environment variable, no
longer have any effect.  (They were declared obsolete in Emacs 23.)
734

735
** New command line option `--no-site-lisp' removes site-lisp directories
736 737
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
738
Nextstep builds).
739

740

741
* Changes in Emacs 24.1
742

743
** Completion
744

745 746 747
*** Many packages now use the `completion-at-point' command,
rather than implementing separate completion commands.

748
*** `completion-at-point' now handles tags and semantic completion.
749

750 751
*** Completion in a non-minibuffer now tries to detect the end of completion
and pops down the *Completions* buffer accordingly.
752 753 754 755

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

*** New option `completion-category-overrides' for overriding the
756
default completion style in certain circumstances.
757

758
*** New completion style `substring'.
759 760 761 762

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

*** The option `widget-complete-field' has been removed.
763

764
** Mail changes
765

766 767 768 769 770 771
*** 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).
772

773 774 775
*** 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.
776

777 778
*** See Changes in Specialized Modes and Packages for SMTPmail changes
and Mail mode changes
Glenn Morris's avatar
Glenn Morris committed
779

Chong Yidong's avatar
Chong Yidong committed
780
** Emacs server and client changes
781

782
*** New option `server-port' specifies the port for TCP Emacs servers.
783

Chong Yidong's avatar
Chong Yidong committed
784
*** New emacsclient argument -q/--quiet suppresses some status messages.
785

786 787
*** New emacsclient argument --frame-parameters specifies the frame
parameters of any newly-created graphical frame.
788 789 790 791

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

Chong Yidong's avatar
Chong Yidong committed
792 793 794 795
*** 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.

796 797 798
** Internationalization changes

*** Emacs now supports display and editing of bidirectional text.
799 800
Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
displayed in the correct visual order as expected by users of those
801 802 803
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.
804

Chong Yidong's avatar
Chong Yidong committed
805
**** New buffer-local variable `bidi-display-reordering'.
806
To disable display reordering in a buffer, change this to nil.
807

Chong Yidong's avatar
Chong Yidong committed
808 809
**** New buffer-local variable `bidi-paragraph-direction'.
If nil (the default), Emacs determines the base direction of each
810 811 812
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.
813

814 815
Paragraphs with right-to-left base direction are displayed starting at
the right window edge.
816

817 818 819 820 821
*** 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.
822

Glenn Morris's avatar
Glenn Morris committed
823 824
*** New input methods for Farsi and Bulgarian
(farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
Chong Yidong's avatar
Chong Yidong committed
825

826 827 828
*** `nobreak-char-display' now also highlights Unicode hyphen chars
(U+2010 and U+2011).

829
*** New Hebrew translation of the Emacs Tutorial.
830 831 832
Type `C-u C-h t' to choose it in case your language setup doesn't
automatically select it.

833 834 835
** 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.
836

837 838
*** M-x list-packages shows a list of packages, which can be
selected for installation.
839

840
*** New command `describe-package', bound to `C-h P'.
841

842 843 844
*** 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
845

846 847
** Custom theme changes

848 849
*** New command `M-x customize-themes', which provides a convenient
interface for enabling and disabling Custom themes.
850

851
*** New option `custom-theme-load-path' is the load path for themes.
852 853 854 855 856 857
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.

858 859 860 861
*** 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.
862

863
** Improved GTK integration
864

865
*** GTK scroll-bars are now placed on the right by default.
866 867
The function `set-scroll-bar-mode' can change this.

868
*** GTK tool bars can have just text, just images or images and text.
869 870 871 872
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.
873 874 875
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.
876

877 878
*** The default colors for selected text (the `region' face) are taken
from the GTK theme when Emacs is built with GTK.
879

880 881
*** Emacs uses GTK tooltips by default if built with GTK.
You can disable this by changing `x-gtk-use-system-tooltips' to nil.
882

883 884 885 886 887 888 889 890 891 892 893 894 895
** 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

896
** Exiting changes
897

898
*** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
899 900
or if it receives a SIGINT signal in batch mode.

901 902 903
*** `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.
904

Chong Yidong's avatar
Chong Yidong committed
905
** Scrolling changes
906

Chong Yidong's avatar
Chong Yidong committed
907
*** New scrolling commands `scroll-up-command' and `scroll-down-command'
Juanma Barranquero's avatar
Juanma Barranquero committed
908
(bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
909
of buffer at first key-press (instead they move to top/bottom of buffer)
910
when `scroll-error-top-bottom' is non-nil.
911 912 913

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

Chong Yidong's avatar
Chong Yidong committed
914
*** New scrolling commands `scroll-up-line' and `scroll-down-line'
915
scroll a line instead of full screen.
916

Chong Yidong's avatar
Chong Yidong committed
917
*** New property `scroll-command' should be set on a command's symbol to
Esa Peuha's avatar
Esa Peuha committed
918
define it as a scroll command affected by `scroll-preserve-screen-position'.
919

Chong Yidong's avatar
Chong Yidong committed
920
*** If you customize `scroll-conservatively' to a value greater than 100,
921 922 923 924
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.
925

926
*** "Aggressive" scrolling now honors the scroll margins.
927 928 929 930 931
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.

932 933
** Basic SELinux support has been added.
This requires Emacs to be linked with libselinux at build time.
934

935 936 937 938
*** 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.
939

940
*** New functions `file-selinux-context' and `set-file-selinux-context'
941
get and set the SELinux context of a file.
942

943
** Trash changes
944

945 946
*** `delete-by-moving-to-trash' now only affects commands that specify
trashing.  This avoids inadvertently trashing temporary files.
947

948 949
*** Calling `delete-file' or `delete-directory' with a prefix argument
now forces true deletion, regardless of `delete-by-moving-to-trash'.
950

Chong Yidong's avatar
Chong Yidong committed
951
** File- and directory-local variable changes
952

Chong Yidong's avatar
Chong Yidong committed
953 954 955 956
*** 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.
957

Chong Yidong's avatar
Chong Yidong committed
958 959 960 961 962
*** 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.
963

Chong Yidong's avatar
Chong Yidong committed
964 965
*** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
Instead, use "eval: (minor-mode 1)".
Glenn Morris's avatar
Glenn Morris committed
966

Glenn Morris's avatar
Glenn Morris committed
967 968
*** The variable `inhibit-first-line-modes-regexps' has been renamed
to `inhibit-local-variables-regexps'.  As the name suggests, it now
969 970 971
applies to ALL file local variables, not just -*- lines.  The
associated `inhibit-first-line-modes-suffixes' has been renamed in the
corresponding way.
972

973 974
** Window changes

975 976 977
*** The `quit-window' command now restores the last buffer displayed
in the quitted window.

978 979 980 981
*** 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.
982

983 984 985 986 987 988 989 990 991 992
**** 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'.

993 994 995 996
*** 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.
997

998 999 1000 1001 1002
*** 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.
1003

1004 1005 1006 1007
*** 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.

1008
*** New commands `maximize-window' and `minimize-window'.
Paul Eggert's avatar
Paul Eggert committed
1009
These maximize and minimize the size of a window within its frame.
1010 1011 1012 1013 1014

*** 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.

1015
** Minibuffer changes
1016

1017
*** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
1018 1019
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
1020

1021
*** Minibuffers set `truncate-lines' to nil.
Glenn Morris's avatar
NEWS  
Glenn Morris committed
1022
If you want to change the value to something else, you could use
1023 1024 1025 1026 1027
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
1028

1029 1030 1031 1032 1033 1034 1035 1036 1037
** 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.

1038

1039
* Editing Changes in Emacs 24.1
1040

1041
** Search changes
1042 1043 1044 1045 1046 1047 1048 1049 1050

*** C-y in Isearch is now bound to