NEWS 141 KB
Newer Older
1
GNU Emacs NEWS -- history of user-visible changes.
2

3
Copyright (C) 2010-2014 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
Temporary note:
18 19 20 21
+++ indicates that all necessary updates to the manuals in doc/ are complete.
--- means no change in the manuals is needed.
When you add a new item, use the appropriate mark if you know it applies,
otherwise leave it unmarked.
Glenn Morris's avatar
Glenn Morris committed
22

23 24

* Installation Changes in Emacs 24.4
25

Chong Yidong's avatar
Chong Yidong committed
26
** Emacs can now be compiled with ACL support.
27 28
This happens by default if a suitable support library is found at
build time, like libacl on GNU/Linux.  To prevent this, use the
29
configure option `--disable-acl'.
30

Chong Yidong's avatar
Chong Yidong committed
31
** Emacs can now be compiled with file notification support.
32 33 34 35
This happens by default if a suitable system library is found at
build time.  To prevent this, use the configure option
`--with-file-notification-no'.  See below for file-notify features.
FIXME?  This feature is not available for the Nextstep port. (?)
36

Chong Yidong's avatar
Chong Yidong committed
37 38
** The configure option `--without-compress-info' has been generalized,
and renamed to `--without-compress-install'.  It now prevents compression
39 40
of _any_ files during installation.

Chong Yidong's avatar
Chong Yidong committed
41
** The configure option `--with-crt-dir' has been removed.
42 43 44
It is no longer needed, as the crt*.o files are no longer linked
specially.

45 46 47
** Directories passed to configure option `--enable-locallisppath' are
no longer created during installation.

Chong Yidong's avatar
Chong Yidong committed
48 49 50 51
** Emacs can be compiled with zlib support.
If this library is present (which it normally is on most systems), the
function `zlib-decompress-region' becomes available, which can
decompress gzip- and zlib-format compressed data.
52

53 54 55 56
---
** Emacs for NS (OSX, GNUStep) can be built with ImageMagick support.
pkg-config is required to find ImageMagick libraries.

57 58 59 60 61
** For OSX >= 10.5, the Core text based font backend from the Mac port is used.
For GNUStep and OSX 10.4 the old backend is used.
To use the old backend by default, do on the command line:
% defaults write org.gnu.Emacs FontBackend ns

Glenn Morris's avatar
Glenn Morris committed
62

63
* Startup Changes in Emacs 24.4
Glenn Morris's avatar
Glenn Morris committed
64

65 66 67 68 69 70 71 72 73 74
+++
** When initializing `load-path', an empty element in the EMACSLOADPATH
environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
"/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
load-path (the one that would have been used if EMACSLOADPATH was unset).
This makes it easier to _extend_ the load-path via EMACSLOADPATH
(previously, EMACSLOADPATH had to specify the complete load-path,
including the defaults).  (In older versions of Emacs, an empty element
was replaced by ".", so use an explicit "." now if that is what you want.)

75 76
+++
** The -L option, which normally prepends its argument to load-path,
77 78
will instead append, if the argument begins with `:' (or `;' on MS Windows;
i.e., `path-separator').
79

80 81 82 83 84 85
+++
** If you use either site-load.el or site-init.el to customize the dumped
Emacs executable, any changes to `load-path' that these files make
will no longer be present after dumping.  To affect a permanent change
to `load-path', use the `--enable-locallisppath' option of `configure'.

Chong Yidong's avatar
Chong Yidong committed
86 87 88 89
+++
** The user option `initial-buffer-choice' can now specify a function
to set up the initial buffer.

Glenn Morris's avatar
Glenn Morris committed
90

91
* Changes in Emacs 24.4
92

93 94 95 96 97 98
+++
** New option `gnutls-verify-error', if non-nil, means that Emacs
should reject SSL/TLS certificates that GnuTLS determines as invalid.
(This option defaults to nil at present, but this is expected to change
in a future release.)

Eli Zaretskii's avatar
Eli Zaretskii committed
99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114
+++
** Emacs now supports menus on text-mode terminals.
If the terminal supports a mouse, clicking on the menu bar, or on
sensitive portions of the mode line or header line, will drop down the
menu defined at that position.  Likewise, clicking C-mouse-2 or
C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
for those locations.

If the text terminal does not support a mouse, you can activate the
first menu-bar menu by typing F10, which invokes `menu-bar-open'.

If you want the previous behavior, whereby F10 invoked `tmm-menubar',
customize the option `tty-menu-open-use-tmm' to a non-nil value.
(Typing M-` will always invoke `tmm-menubar', even if
`tty-menu-open-use-tmm' is nil.)

115
+++
Chong Yidong's avatar
Chong Yidong committed
116 117 118 119
** The *Messages* buffer is created in `messages-buffer-mode',
a new major mode, with read-only status.  Any code that might create
the *Messages* buffer should call the function `messages-buffer' to do
so and set up the mode.
120

Chong Yidong's avatar
Chong Yidong committed
121
** Emacs now supports ACLs (access control lists).
122 123 124 125
+++
*** Emacs preserves the ACL entries of files when backing up.
+++
*** New functions `file-acl' and `set-file-acl' get and set the ACL
126 127 128
entries of a file.  On GNU/Linux, the POSIX ACL interface is used via
libacl.  On MS-Windows, the NT Security APIs are used to emulate the
POSIX ACL interfaces.
129

130 131 132 133 134 135
** Multi-monitor support has been added.

*** New functions `display-monitor-attributes-list' and
`frame-monitor-attributes' can be used to obtain information about
each physical monitor on multi-monitor setups.

136 137 138 139 140 141 142 143
*** The functions `display-pixel-width' and `display-pixel-height' now
behave consistently among the platforms: they return the pixel width
or height for all physical monitors associated with the given display
as just they were on X11.  To get information for each physical
monitor, use the new functions above.  Similar notes also apply to
`x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
`display-mm-height', `x-display-mm-width', and `x-display-mm-height'.

Chong Yidong's avatar
Chong Yidong committed
144 145 146
+++
** The cursor stops blinking after 10 blinks (by default) on X and NS.
You can change the default by customizing `blink-cursor-blinks'.
147

Chong Yidong's avatar
Chong Yidong committed
148 149 150 151 152
+++
** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
This affects View mode, etc.

** Help changes
Glenn Morris's avatar
Glenn Morris committed
153

Tassilo Horn's avatar
Tassilo Horn committed
154
+++
Chong Yidong's avatar
Chong Yidong committed
155 156 157 158 159
*** The command `apropos-variable' is renamed to `apropos-user-option'.
`apropos-user-option' shows all user options while `apropos-variable'
shows all variables.  When called with a universal prefix argument,
the two commands swap their behaviors.  When `apropos-do-all' is
non-nil, they output the same results.
160

Chong Yidong's avatar
Chong Yidong committed
161 162
+++
*** The key `?' now describes prefix bindings, like `C-h'.
163

Chong Yidong's avatar
Chong Yidong committed
164
*** The command `quail-help' is deleted.  Use `C-h C-\'
165 166
(`describe-input-method') instead.

167 168 169 170 171 172 173 174 175
** ImageMagick

*** ImageMagick images now support the :max-width and :max-height
keywords.

*** Some data types aren't auto-detected by ImageMagick.  Adding
:format to `create-image' may help if the content type is in the
new variable `image-format-suffixes'.

Chong Yidong's avatar
Chong Yidong committed
176
** Frame and window changes
177

Chong Yidong's avatar
Chong Yidong committed
178 179 180
+++
*** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
bound to <f11> and M-<f10>, respectively.
181

Chong Yidong's avatar
Chong Yidong committed
182 183 184 185
*** New command `frameset-to-register' is now bound to `C-x r f', replacing
`frame-configuration-to-register'.  It offers similar functionality,
plus enhancements like the ability to restore deleted frames.  The
command `frame-configuration-to-register' still exists, but is unbound.
186

187
+++
Chong Yidong's avatar
Chong Yidong committed
188 189 190 191 192 193 194 195
*** New hooks `focus-in-hook', `focus-out-hook'.
These are normal hooks run when an Emacs frame gains or loses input focus.

---
*** `split-window' is now a non-interactive function, not a command.
As a command, it was a special case of `C-x 2' (`split-window-below'),
and as such superfluous.  After being reimplemented in Lisp, its
interactive form was mistakenly retained.
196

197
+++
Chong Yidong's avatar
Chong Yidong committed
198 199 200 201 202 203
*** New option `scroll-bar-adjust-thumb-portion'.
Available only on X, this option allows to control over-scrolling
using the scroll bar (i.e. dragging the thumb down even when the end
of the buffer is visible).

** Lisp evaluation changes
204
+++
Chong Yidong's avatar
Chong Yidong committed
205 206 207 208 209 210 211 212 213 214 215
*** `eval-defun' on an already defined defcustom calls the :set function,
if there is one.

*** A zero prefix arg of `eval-last-sexp' (`C-x C-e'),
`eval-expression' (`M-:') and `eval-print-last-sexp' (`C-j') inserts
a list with no limit on its length and level (by using nil values of
`print-length' and `print-level'), and inserts additional formats for
integers (octal, hexadecimal, and character).

---
** `write-region-inhibit-fsync' now defaults to t in batch mode.
216

217
+++
Chong Yidong's avatar
Chong Yidong committed
218 219
** `cache-long-line-scans' has been renamed to `cache-long-scans'
because it affects caching of paragraph scanning results as well.
220

Chong Yidong's avatar
Chong Yidong committed
221 222 223 224 225 226 227 228
---
** The option `set-mark-default-inactive' has been deleted.
This unfinished feature was introduced by accident in Emacs 23.1;
simply disabling Transient Mark mode does the same thing.

** The default value of `comment-use-global-state' is changed to t,
and this variable has been marked obsolete.

Chong Yidong's avatar
Chong Yidong committed
229 230 231 232 233 234 235 236 237 238 239 240 241 242
** New user options:

*** `read-regexp-defaults-function' defines a function to read regexps,
used by commands like `rgrep', `lgrep' `occur', `highlight-regexp',
etc.  You can customize this to specify a function that provides a
default value from the regexp last history element, or from the symbol
found at point.

*** `load-prefer-newer', affects how the `load' function chooses the
file to load.  If this is non-nil, then when both .el and .elc
versions of a file exist, and the caller did not explicitly specify
which one to load, then the newer file is loaded.  The default, nil,
means to always load the .elc file.

Chong Yidong's avatar
Chong Yidong committed
243 244 245 246 247 248 249 250 251 252 253

* Editing Changes in Emacs 24.4

** Indentation changes

+++
*** The behavior of `C-x TAB' (`indent-rigidly') has changed.
When invoked without a prefix argument, it now activates a transient
mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
the text indentation in the region.  Typing any other key resumes
normal editing behavior.
254

Chong Yidong's avatar
Chong Yidong committed
255
*** `electric-indent-mode' is enabled by default.
256

Chong Yidong's avatar
Chong Yidong committed
257
*** `tab-stop-list' is now implicitly extended to infinity by repeating
Xue Fuqiao's avatar
Xue Fuqiao committed
258 259
the last step.  Its default value is changed to nil which means a tab
stop every `tab-width' columns.
260

Chong Yidong's avatar
Chong Yidong committed
261
** Filling changes
262

Chong Yidong's avatar
Chong Yidong committed
263 264 265 266 267 268 269 270 271 272
*** New command `cycle-spacing' cycles between spacing conventions:
having just one space, no spaces, or reverting to the original
spacing.  Like `just-one-space', it can handle or ignore newlines and
leave different number of spaces.

*** `fill-single-char-nobreak-p' prevents fill from breaking a line after
a 1-letter word, which is an error according to Polish and
Czech typography rules.  To globally enable this feature, evaluate:

  (add-hook 'fill-nobreak-predicate 'fill-single-char-nobreak-p)
273

274
+++
Chong Yidong's avatar
Chong Yidong committed
275 276 277 278
** Uniquify is enabled by default with `post-forward-angle-brackets' style.

** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
Most commands are still unaware of it, but kill/yank do work on the rectangle.
279

280 281 282 283 284 285 286
+++
** New option `visual-order-cursor-movement'.
If this is non-nil, cursor motion with arrow keys will follow the
visual order of characters on the screen: <left> always moves to the
left, <right> always moves to the right, disregarding the surrounding
bidirectional context.

Chong Yidong's avatar
Chong Yidong committed
287
** Register changes
288

Chong Yidong's avatar
Chong Yidong committed
289
*** All register commands can now show help with preview.
290

291 292 293
+++
*** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
macros in registers.
294

Chong Yidong's avatar
Chong Yidong committed
295 296 297 298 299 300 301 302 303
*** New command `C-x r f' (`frameset-to-register').
See Changes in Emacs 24.4, above.

** New command `delete-duplicate-lines'.
When its arg ADJACENT is non-nil (when called interactively with C-u
C-u) it works like the utility `uniq'.  Otherwise by default it
deletes duplicate lines everywhere in the region without regard to
adjacency.  When its arg KEEP-BLANKS is non-nil (when called
interactively with C-u C-u C-u), duplicate blank lines are preserved.
304

305

306
* Changes in Specialized Modes and Packages in Emacs 24.4
307

Johan Bockgård's avatar
Johan Bockgård committed
308
** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
Stefan Monnier's avatar
Stefan Monnier committed
309 310 311 312 313 314 315 316 317 318 319 320 321 322 323
Affected files:
~/.emacs.d/timelog	replaces  ~/.timelog
~/.emacs.d/vip		replaces  ~/.vip
~/.emacs.d/viper	replaces  ~/.viper
~/.emacs.d/ido.last	replaces  ~/.ido.last
~/.emacs.d/kkcrc	replaces  ~/.kkcrc
~/.emacs.d/quickurls	replaces  ~/.quickurls
~/.emacs.d/idlwave	replaces  ~/.idlwave
~/.emacs.d/bdfcache.el	replaces  ~/.bdfcache.el
~/.emacs.d/places	replaces  ~/.emacs-places
~/.emacs.d/shadows	replaces  ~/.shadows
~/.emacs.d/shadow_todo	replaces  ~/.shadow_todo
~/.emacs.d/strokes	replaces  ~/.strokes
~/.emacs.d/notes	replaces  ~/.notes
~/.emacs.d/type-break	replaces  ~/.type-break
324 325 326 327 328
Also the following files used by the now obsolete otodo-mode.el:
~/.emacs.d/todo-do	replaces  ~/.todo-do
~/.emacs.d/todo-done	replaces  ~/.todo-done
~/.emacs.d/todo-top	replaces  ~/.todo-top

Chong Yidong's avatar
Chong Yidong committed
329
** Backtrace and debugger
330

Chong Yidong's avatar
Chong Yidong committed
331 332 333
*** The Lisp debugger's `e' command now includes the lexical environment
when evaluating the code in the context at point.  Hence, it now lets
you access lexical variables.
334

335 336
+++
*** New command `v' (`debugger-toggle-locals') displays local vars.
337

Chong Yidong's avatar
Chong Yidong committed
338 339
*** New minor mode `jit-lock-debug-mode' lets you use the debuggers on
code run via JIT Lock.
340

341 342
** Battery

Xue Fuqiao's avatar
Xue Fuqiao committed
343
---
344 345
*** Battery information via the BSD `apm' utility is now supported.

346 347 348 349
** Buffer Menu

*** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.

350 351
** Calendar and Diary

352
---
Chong Yidong's avatar
Chong Yidong committed
353 354
*** New faces `calendar-weekday-header', `calendar-weekend-header',
and `calendar-month-header'.
355 356 357

*** New option `calendar-day-header-array'.

358
+++
Glenn Morris's avatar
Glenn Morris committed
359
*** New variable `diary-from-outlook-function', used by the command
360 361
`diary-from-outlook'.

Chong Yidong's avatar
Chong Yidong committed
362
*** The variable `calendar-font-lock-keywords' is obsolete.
363

364 365 366 367 368 369 370 371 372 373 374 375 376 377
** Calc

*** Calc by default now uses the Gregorian calendar for all dates, and
uses January 1, 1 AD as its day number 1.  Previously Calc used the
Julian calendar for dates before September 14, 1752, and it used
December 31, 1 BC as its day number 1; the new scheme is more
consistent with Calendar's calendrical system and day numbering.

*** The new variable `calc-gregorian-switch' lets you configure the
date when Calc switches from the Julian to the Gregorian calendar.
Nil, the default value, means to always use the Gregorian calendar.
The value (YEAR MONTH DAY) means to start using the Gregorian calendar
on the given date.

378 379
*** Support for ISO 8601 dates.

Chong Yidong's avatar
Chong Yidong committed
380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408
** CEDET

*** EDE

**** The cpp-root project now supports executing a compile command.
It can be set through the new :compile-command slot or the
buffer-local variable `compile-command'.

**** Better selection of include directories for the 'linux' project.
Include directories now support out-of-tree build directories and
target architecture auto-detection.

*** Semantic

**** Improved detection of used namespaces in current scope in C++.

**** Parsing of default values for variables and function arguments in C/C++.
They are also displayed by the summarize feature in the modeline.

**** Improved parsing of function pointers in C/C++.
This also includes parsing of function pointers as function arguments.

**** Parsing of C/C++ preprocessor macros which open new scope.
For example, this enables parsing of macros which open new namespaces.

**** Support for 'this' pointer in inline member functions in C++.

** cl-lib

409
*** New macro `cl-tagbody'.
Chong Yidong's avatar
Chong Yidong committed
410 411 412 413 414 415

+++
*** letf is now just an alias for cl-letf.

** CUA mode

Chong Yidong's avatar
Chong Yidong committed
416 417 418 419 420 421
*** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
Hence, you can now enable it independently from `transient-mark-mode',
`delete-selection-mode', and `shift-select-mode'.

*** `cua-highlight-region-shift-only' is now obsolete.
You can disable `transient-mark-mode' to get the same result.
Chong Yidong's avatar
Chong Yidong committed
422 423 424

*** CUA's rectangles can now be used via `cua-rectangle-mark-mode'.

425 426 427 428 429 430 431 432
** CFEngine mode

*** Support for completion, ElDoc, and Flycheck has been added.

*** The current CFEngine syntax is parsed from "cf-promises -s json".
There is a fallback syntax available if you don't have cf-promises or
if it doesn't support that option.

Chong Yidong's avatar
Chong Yidong committed
433 434
** Delete Selection mode can now be used without `transient-mark-mode'.

435 436
** Desktop

437 438
*** `desktop-auto-save-timeout' defines the number of seconds idle time
before auto-save of the desktop.
439

440
*** `desktop-restore-frames', enabled by default, allows saving and
441
restoring the frame/window configuration (frameset).  Additional options
442
`desktop-restore-in-current-display', `desktop-restore-reuses-frames'
443
and `desktop-restore-forces-onscreen' offer further customization.
444

445 446 447 448
** Dired

*** New minor mode `dired-hide-details-mode' hides details.

Chong Yidong's avatar
Chong Yidong committed
449
** Eldoc Mode works properly in the minibuffer.
450

451 452 453 454 455 456 457
** Electric Pair mode
*** New `electric-pair-preserve-balance' enabled by default.

Pairing/skipping only kicks in when that help the balance of
parentheses and quotes, i.e. the buffer should end up at least as
balanced as before.

Paul Eggert's avatar
Paul Eggert committed
458
You can further control this behavior by adjusting the predicates
459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483
stored in `electric-pair-inhibit-predicate' and
`electric-pair-skip-self'.

*** New `electric-pair-delete-adjacent-pairs' enabled by default.

In `electric-pair-mode', the commands `backward-delete-char' and
`backward-delete-char-untabify' are now bound to electric variants
that delete the closer when invoked between adjacent pairs.

*** New `electric-pair-open-newline-between-pairs' enabled by default.

In `electric-pair-mode', inserting a newline between adjacent pairs
opens an extra newline after point, which is indented if
`electric-indent-mode' is also set.

*** New `electric-pair-skip-whitespace' enabled by default.

Controls if skipping over closing delimiters should jump over any
whitespace slack. Setting it to `chomp' makes it delete this
whitespace. See also the variable
`electric-pair-skip-whitespace-chars'.

*** New variables control the pairing in strings and comments.

You can customize `electric-pair-text-pairs' and
Paul Eggert's avatar
Paul Eggert committed
484
`electric-pair-text-syntax-table' to tweak pairing behavior inside
485 486
strings and comments.

487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502
** EPA

*** New option `epa-mail-aliases'.

You can set this to a list of alias expansions for keys to use
in `epa-mail-encrypt'.

If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
that means: when one of the recipients of the message being encrypted
is `foo@bar.com', encrypt the message for `foo@hello.org' instead.

If one element of the variable's value is ("foo@bar.com"),
that means: when one of the recipients of the message being encrypted
is `foo@bar.com', ignore that name as regards encryption.
This is useful to avoid a query when you have no key for that name.

Chong Yidong's avatar
Chong Yidong committed
503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540
** ERC

*** New option `erc-accidental-paste-threshold-seconds'.
If set to a number, this can be used to avoid accidentally paste large
amounts of data into the ERC input.

+++
** ERT

*** New macro `skip-unless' allows skipping ERT tests.
See the ERT manual for details.

** Eshell

+++
*** `eshell' now supports visual subcommands and options
Eshell has been able to handle "visual" commands (interactive,
non-line oriented commands such as top that require display
capabilities not provided by eshell) by running them in an Emacs
terminal emulator.  See `eshell-visual-commands'.

This feature has been extended to subcommands and options that make a
usually line-oriented command a visual command.  Typical examples are
"git log" and "git <command> --help" which display their output in a
pager by default.  See `eshell-visual-subcommands' and
`eshell-visual-options'.

---
*** Added Eshell-Tramp module
External su and sudo commands are now the default; the internal,
Tramp-using variants can still be used by enabling the eshell-tramp
module.

** F90 mode
---
*** New option `f90-smart-end-names'.

** Icomplete is a bit more like Ido.
541

Chong Yidong's avatar
Chong Yidong committed
542
*** key bindings to navigate through and select the completions.
543

Chong Yidong's avatar
Chong Yidong committed
544
*** The icomplete-separator is customizable, and its default has changed.
545

Chong Yidong's avatar
Chong Yidong committed
546
*** Removed icomplete-show-key-bindings.
547

Chong Yidong's avatar
Chong Yidong committed
548 549 550 551 552
*** Icomplete-mode by defaults applies to all forms of minibuffer completion.
(setq icomplete-with-completion-tables '(internal-complete-buffer))
will revert to the old behavior.

** Ido
553

Chong Yidong's avatar
Chong Yidong committed
554
*** Ido has a manual now.
555

Chong Yidong's avatar
Chong Yidong committed
556
*** `ido-use-virtual-buffers' takes a new value 'auto.
557

Chong Yidong's avatar
Chong Yidong committed
558 559 560 561
*** `ido-decorations' has been slightly extended to give a bit more control.

** Image mode

562
+++
Chong Yidong's avatar
Chong Yidong committed
563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592
*** New commands `n' (`image-next-file') and `p' (`image-previous-file')
visit the next image file and the previous image file in the same
directory, respectively.

*** New commands to show specific frames of multi-frame images.
`f' (`image-next-frame') and `b' (`image-previous-frame') visit the
next or previous frame.  `F' (`image-goto-frame') shows a specific frame.

*** New commands to speed up, slow down, or reverse animation.
---
*** The command `image-mode-fit-frame' deletes other windows.
When toggling, it restores the frame's previous window configuration.
It also has an optional frame argument, which can be used by Lisp
callers to fit the image to a frame other than the selected frame.

** Hi-Lock

*** New option `hi-lock-auto-select-face'.  When non-nil, hi-lock commands
will cycle through faces in `hi-lock-face-defaults' without prompting.

+++
*** New global command `M-s h .' (`highlight-symbol-at-point')
highlights the symbol found near point without prompting,
using the next face automatically.

** Imenu

*** New option `imenu-generic-skip-comments-and-strings'.

** Info
593
---
Chong Yidong's avatar
Chong Yidong committed
594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636
*** New face `info-index-match' is used to highlight matches in index
entries displayed by `Info-index-next', `Info-virtual-index' and
`info-apropos'.

** JS Mode

*** Better indentation of multiple-variable declarations.
If declaration spans several lines, variables on the following lines
are lined up to the first one.

*** We now recognize and better indent continuations in array
comprehensions.

*** New option `js-switch-indent-offset`.

** MH-E has been updated to MH-E version 8.5.
See MH-E-NEWS for details.

+++
** Octave mode
*** Font locking for texinfo comments and new keywords
*** Completion in Octave file buffers
*** Eldoc support
*** Jump to definition
*** Documentation lookup/search
*** Code cleanup and various bug fixes

** OPascal mode is the new name for Delphi mode.

*** All delphi-* variables and functions have been renamed to opascal-*.
*** `delphi-newline-always-indents' is not supported any more.
Use `electric-indent-mode' instead.
*** `delphi-tab' is gone, replaced by `indent-for-tab-command'.

** Package

*** The format of `archive-contents' files, generated by package
repositories, has changed to allow a new (fifth) element in the data
vectors, containing an associative list with extra properties.

*** `describe-package' buffer uses the `:url' extra property to
display a `Homepage' header, if it's present.

637 638 639 640 641 642 643
*** In the buffer produced by `describe-package', there are now buttons
listing the keywords related to that package.  You can click on them
to see other packages related to any given keyword.

*** In the *Packages* buffer, `f' or the Package->Filter menu filters
the packages by a keyword.

Chong Yidong's avatar
Chong Yidong committed
644
** Prolog mode
645

Chong Yidong's avatar
Chong Yidong committed
646 647
*** `prolog-use-smie' has been removed, along with the non-SMIE
indentation code.
Xue Fuqiao's avatar
Xue Fuqiao committed
648

Chong Yidong's avatar
Chong Yidong committed
649
** Remember
650

Chong Yidong's avatar
Chong Yidong committed
651 652
*** The new command `remember-notes' creates a buffer which is saved
on `kill-emacs'.
Xue Fuqiao's avatar
Xue Fuqiao committed
653

Chong Yidong's avatar
Chong Yidong committed
654 655 656 657 658 659
You may think of it as a *scratch* buffer whose content is preserved.
In fact, it was designed as a replacement for *scratch* buffer and can
be used that way by setting `initial-buffer-choice' to
`remember-notes' and `remember-notes-buffer-name' to "*scratch*".
Without the second change, *scratch* buffer will still be there for
notes that do not need to be preserved.
660

Chong Yidong's avatar
Chong Yidong committed
661 662 663
*** The Remember package can now store notes in separates files.
You can use the new function `remember-store-in-files' within the
`remember-handler-functions' option.
664

Chong Yidong's avatar
Chong Yidong committed
665 666
See `remember-data-directory' and `remember-directory-file-name-format'
for new options related to this function.
667

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

*** Customize `rmail-mbox-format' to influence some minor aspects of
how Rmail displays non-MIME messages.
672

673
---
Chong Yidong's avatar
Chong Yidong committed
674 675
*** The `unrmail' command now converts from BABYL to mboxrd format,
rather than mboxo.  Customize `unrmail-mbox-format' to change this.
676

Chong Yidong's avatar
Chong Yidong committed
677
** Ruby mode
678

Chong Yidong's avatar
Chong Yidong committed
679
*** New option `ruby-encoding-magic-comment-style'.
680

Chong Yidong's avatar
Chong Yidong committed
681
*** New option `ruby-custom-encoding-magic-comment-template'.
682

Chong Yidong's avatar
Chong Yidong committed
683
*** New mode menu.
684

Chong Yidong's avatar
Chong Yidong committed
685 686 687 688 689
*** Improved syntax highlighting and indentation.

*** Add more Ruby file types to `auto-mode-alist'.

*** New option `ruby-align-to-stmt-keywords'.
690

691 692
*** New `electric-indent-mode' integration.

693
** Search and Replace
694

695
+++
696 697 698 699
*** New global command `M-s .' (`isearch-forward-symbol-at-point')
starts a symbol (identifier) incremental search forward with the
symbol found near point added to the search string initially.

700 701 702
*** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
and adds it to the search string.

703 704 705
*** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
between nil and the value of the option `search-invisible' (or `open'
when it's nil).
706

707 708 709
*** `query-replace' skips invisible text when `search-invisible' is nil,
and opens overlays with hidden text when `search-invisible' is `open'.

710
+++
Juri Linkov's avatar
Juri Linkov committed
711 712 713 714
*** A negative prefix arg of replacement commands replaces backward.
`M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
backward, `M-s w words M-- M-%' replaces a sequence of words backward.

715 716 717 718
+++
*** By default, prefix arguments do not now terminate Isearch mode.
Set `isearch-allow-prefix' to nil to restore old behavior.

719 720 721 722
*** More Isearch commands accept prefix arguments, namely
`isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
`isearch-yank-line'.

723 724 725 726 727 728 729 730
*** Word search now matches whitespace at the beginning/end
of the search string if it contains leading/trailing whitespace.
In an incremental word search or when using a non-nil LAX argument
of `word-search-regexp', the lax matching can also match part of
the first word (in addition to the lax matching of the last word).
The same rules are now applied to the symbol search with the difference
that it matches symbols, and non-symbol characters between symbols.

Chong Yidong's avatar
Chong Yidong committed
731 732
+++
** SES
Bill Wohler's avatar
Bill Wohler committed
733

Chong Yidong's avatar
Chong Yidong committed
734
*** New command `ses-rename-cell' allows assigning names to SES cells.
735

Chong Yidong's avatar
Chong Yidong committed
736
** Shell
737

Chong Yidong's avatar
Chong Yidong committed
738 739 740 741
*** `explicit-bash-args' now always defaults to use --noediting.
During initialization, Emacs no longer expends a process to decide
whether it is safe to use Bash's --noediting option.  These days
--noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
742

Chong Yidong's avatar
Chong Yidong committed
743
** Shell Script mode
744

Chong Yidong's avatar
Chong Yidong committed
745 746
*** `sh-mode' now has the mode own `add-log-current-defun-function'.
You can pick the name of the function and the variables with `C-x 4 a'.
747

748 749
*** The SMIE indentation engine is now used by default.

Chong Yidong's avatar
Chong Yidong committed
750 751 752 753 754 755 756
** SMIE indentation can be customized via `smie-config'.
The customization can be guessed by Emacs by providing a sample indented
file and letting SMIE learn from it.

** Term mode

*** New option `term-suppress-hard-newline'.
757

758 759 760 761 762
** Todo mode has been rewritten and enhanced.
New features include:
- support for multiple todo files and archive files of done items;
- renaming, reordering, moving, merging, and deleting categories;
- sortable tabular summaries of categories and the types of items they contain;
Paul Eggert's avatar
Paul Eggert committed
763
- cross-category lists of items filtered by specific criteria;
764 765 766 767 768 769 770
- more fine-grained interaction with the Emacs diary, by being able to decide
  for each todo item whether it appears in the Fancy Diary display;
- highly flexible new item insertion and item editing;
- moving items between categories, storing done items in their category or in
  archive files, undoing or unarchiving done items;
- reprioritizing items by inputting a numerical priority;
- extensive customizability of operation and display, including numerous faces.
771
The Todo mode user manual describes all commands and most user options.
772 773 774 775 776 777
To support some of these features, a new file format is used, which is
incompatible with the old format; however, you can convert old todo and done
item files to the new format on initializing the first new todo file, or at any
later time with the provided conversion command.  The old version of
todo-mode.el has been made obsolete and renamed otodo-mode.el.

Chong Yidong's avatar
Chong Yidong committed
778 779 780 781 782 783 784 785 786
** trace-function was largely rewritten.
New features include:
- no prompting for the destination buffer, unless a prefix-arg was used.
- additionally to prompting for a destination buffer, when a prefix-arg is
  used, the user can enter a "context", i.e. Lisp expression whose value at the
  time the function is entered/exited will be printed along with the function
  name and arguments.  Useful to trace the value of (current-buffer) or
  (point) when the function is invoked.

787
** Tramp
788

789 790
*** The experimental url syntax for remote file names is withdrawn.

791 792
+++
*** New connection method "adb", which allows to access Android
793 794
devices by the Android Debug Bridge.  The variable `tramp-adb-program'
can be used to adapt the path of the "adb" program, if needed.
795

796 797 798 799
*** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
"scpc" and "rsyncc" are discontinued.  The ssh option
"ControlMaster=auto" is set automatically in all ssh-based methods,
when possible.
800

801 802 803
+++
*** Handlers for `file-acl' and `set-file-acl' for remote machines
which support POSIX ACLs.
804

805 806 807 808
+++
*** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
for remote machines which support filesystem notifications.

809 810 811
** New command `url-cookie-list' displays all the current cookies, and
allows deleting selected cookies.

Chong Yidong's avatar
Chong Yidong committed
812
** VC and related modes
813

Xue Fuqiao's avatar
Xue Fuqiao committed
814
+++
Chong Yidong's avatar
Chong Yidong committed
815 816
*** In VC directory mode, `D' displays diffs between VC-controlled
whole tree revisions.
817

Xue Fuqiao's avatar
Xue Fuqiao committed
818
+++
Chong Yidong's avatar
Chong Yidong committed
819 820
*** In VC directory mode, `L' lists the change log for the current VC
controlled tree in a window.
821

Xue Fuqiao's avatar
Xue Fuqiao committed
822
+++
Chong Yidong's avatar
Chong Yidong committed
823 824
*** In VC directory mode, `I' shows a log of changes that will be
received with a pull operation.
825

Xue Fuqiao's avatar
Xue Fuqiao committed
826
+++
Chong Yidong's avatar
Chong Yidong committed
827 828 829
*** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
under current version control system.  When called with a prefix
argument, you can remove a file from the ignored file list.
830

831
---
Chong Yidong's avatar
Chong Yidong committed
832 833
*** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
because it is moved to vc-cvs.el.
834

Chong Yidong's avatar
Chong Yidong committed
835
** VHDL mode
836

Chong Yidong's avatar
Chong Yidong committed
837
*** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
838

Chong Yidong's avatar
Chong Yidong committed
839
*** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
840

Chong Yidong's avatar
Chong Yidong committed
841
** Woman
842

Chong Yidong's avatar
Chong Yidong committed
843 844
*** The commands `woman-default-faces' and `woman-monochrome-faces'
are obsolete.  Customize the `woman-*' faces instead.
845

Chong Yidong's avatar
Chong Yidong committed
846 847
** Obsolete packages:

848 849
*** Iswitchb is made obsolete by icomplete-mode.

Chong Yidong's avatar
Chong Yidong committed
850 851
*** longlines.el is obsolete; use visual-line-mode instead.

Glenn Morris's avatar
Glenn Morris committed
852 853 854
+++
*** sup-mouse.el.

Chong Yidong's avatar
Chong Yidong committed
855 856
*** terminal.el is obsolete; use term.el instead.

857 858
*** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.

859
*** xesam.el is obsolete, because the XESAM project has been cancelled.
Michael Albinus's avatar
Michael Albinus committed
860

Glenn Morris's avatar
Glenn Morris committed
861 862 863
+++
*** yow.el is obsolete; use fortune.el or cookie1.el instead.

Glenn Morris's avatar
Glenn Morris committed
864 865 866 867
---
*** The Info-edit command is obsolete.  Editing Info nodes by hand
has not been relevant for some time.

868

869
* New Modes and Packages in Emacs 24.4
Juanma Barranquero's avatar
Juanma Barranquero committed
870

Chong Yidong's avatar
Chong Yidong committed
871 872 873 874
** New package `eww' is a built-in web browser.
It is only available if Emacs is compiled with libxml2 support.

** New minor mode `superword-mode', defined in subword.el
Ted Zlatanov's avatar
Ted Zlatanov committed
875 876 877 878
`superword-mode' overrides the default word motion commands to treat
symbol_words as a single word, similar to what `subword-mode' does and
using the same internal functions.

Chong Yidong's avatar
Chong Yidong committed
879
** New package nadvice.el offers lighter-weight advice facilities.
880 881 882 883 884 885
It is layered as:
- add-function/remove-function which can be used to add/remove code on any
  function-carrying place, such as process-filters or `<foo>-function' hooks.
- advice-add/advice-remove to add/remove a piece of advice on a named function,
  much like `defadvice' does.

Chong Yidong's avatar
Chong Yidong committed
886
** New package frameset.el.
887 888 889 890 891
It provides a set of operations to save a frameset (the state of all
or a subset of the existing frames and windows, somewhat similar to a
frame configuration), both in-session and persistently, and restore it
at some point in the future.

Michael Albinus's avatar
Michael Albinus committed
892
+++
Chong Yidong's avatar
Chong Yidong committed
893 894
** New package filenotify.el provides an interface for file system
notifications.  It requires that Emacs be compiled with one of the
895 896
low-level libraries gfilenotify.c, inotify.c or w32notify.c.

Glenn Morris's avatar
Glenn Morris committed
897

898
* Incompatible Lisp Changes in Emacs 24.4
899

900
---
901 902
** `kill-region' lost its `yank-handler' optional argument.

903
+++
904 905 906
** `(input-pending-p)' no longer runs other timers which are ready to
run.  The new optional CHECK-TIMERS param allows for the prior behavior.

Chong Yidong's avatar
Chong Yidong committed
907
+++
908 909
** `defvar' and `defcustom' in a let-binding affect the "external" default.

910
---
911 912 913
** The syntax of ?» and ?« is now punctuation instead of matched parens.
Some languages match those as »...« and others as «...» so better stay neutral.

914
---
Chong Yidong's avatar
Chong Yidong committed
915 916
** In compiled Lisp files, the header no longer includes a timestamp.

917
+++
918
** The default file coding for Emacs Lisp files is now utf-8.
Chong Yidong's avatar
Chong Yidong committed
919 920 921 922 923
(See `file-coding-system-alist'.)  In most cases, this change is
transparent, but files that contain unusual characters without
specifying an explicit coding system may fail to load with obscure
errors.  You should either convert them to utf-8 or add an explicit
`coding:' cookie.
924

925
+++
Chong Yidong's avatar
Chong Yidong committed
926
** `overriding-terminal-local-map' no longer replaces the local keymaps.
927 928 929
It used to disable the minor mode, major mode, and text-property keymaps,
whereas now it simply has higher precedence.

Juanma Barranquero's avatar
Juanma Barranquero committed
930
** Default process filters and sentinels are not nil any more.
931 932
Instead they default to a function which does what the nil value used to do.

Chong Yidong's avatar
Chong Yidong committed
933
+++
934
** `read-event' does not return decoded chars in ttys any more.
Chong Yidong's avatar
Chong Yidong committed
935 936 937 938
As was the case in Emacs 22 and before, the decoding of terminal
input, according to `keyboard-coding-system', is not performed in
`read-event' any more.  But unlike in Emacs 22, this decoding is still
done before input-decode-map, function-key-map, etc.
939

940 941
---
** Removed `inhibit-local-menu-bar-menus'.
942

943 944
---
** Frame-local variables that affect redisplay do not work any more.
945 946 947
More specifically, the redisplay does not bother to check for a frame-local
value when looking up variables.

Chong Yidong's avatar
Chong Yidong committed
948
+++
Chong Yidong's avatar
Chong Yidong committed
949
** nil and "unbound" are indistinguishable in `symbol-function'.
Chong Yidong's avatar
Chong Yidong committed
950 951
`symbol-function' does not signal a `void-function' error any more.
To determine if a symbol's function definition is void, use `fboundp'.
952

Chong Yidong's avatar
Chong Yidong committed
953
+++
954 955
** `defadvice' does not honor the `freeze' flag and cannot advise
special-forms any more.
956

Chong Yidong's avatar
Chong Yidong committed
957 958 959 960
---
** `dolist' no longer binds VAR while evaluating the RESULT form,
when lexical binding is enabled.  Previously, VAR was bound to nil,
which often led to spurious unused-variable warnings.
961

Chong Yidong's avatar
Chong Yidong committed
962
+++
963 964 965 966 967 968
** The return value of `backup-buffer' has changed.
The second argument is no longer an SELinux context, instead it is an
alist of extended attributes as returned by the new function
`file-extended-attributes'.  The attributes can be applied to another
file using `set-file-extended-attributes'.

969 970 971 972 973 974
** By default `copy-file' no longer copies file permission bits to an
existing destination; and it sets the file permission bits of a newly
created destination to those of the source, masked by the default file
permissions.  To copy the file permission bits, pass t as the
PRESERVE-PERMISSIONS argument of `copy-file'.

Chong Yidong's avatar
Chong Yidong committed
975
+++
Paul Eggert's avatar
Paul Eggert committed
976 977 978
** `visited-file-modtime' now returns -1 for nonexistent files.
Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
in the presence of files with negative time stamps.
979

Chong Yidong's avatar
Chong Yidong committed
980
+++
Chong Yidong's avatar
Chong Yidong committed
981
** The cars of the elements in `interpreter-mode-alist' are now
Chong Yidong's avatar
Chong Yidong committed
982
treated as regexps rather than literal strings.
983

Glenn Morris's avatar
Glenn Morris committed
984

985
* Lisp Changes in Emacs 24.4
986

Chong Yidong's avatar
Chong Yidong committed
987
+++
Chong Yidong's avatar
Chong Yidong committed
988 989
** The second argument of `eval' can now specify a lexical environment.

990
+++
Chong Yidong's avatar
Chong Yidong committed
991
** New functions `special-form-p' and `macrop'.
Chong Yidong's avatar
Chong Yidong committed
992 993 994 995 996

** New macro `define-alternatives' can be used to define generic commands.
Generic commands are interactive functions whose implementation can be
selected among several alternatives, as a matter of user preference.

Chong Yidong's avatar
Chong Yidong committed
997 998 999
** The `defalias-fset-function' property lets you catch `defalias'
calls, and redirect them to your own function, instead of `fset'.

Xue Fuqiao's avatar
Xue Fuqiao committed
1000
+++
Chong Yidong's avatar
Chong Yidong committed
1001 1002 1003 1004
** New variable `enable-dir-local-variables'.
Directory-local variables are ignored if this is nil.  This may be
useful for modes that want to ignore directory-locals while still
respecting file-local variables.
Chong Yidong's avatar
Chong Yidong committed
1005

Chong Yidong's avatar
Chong Yidong committed
1006 1007
+++
** New function `get-pos-property'.
Chong Yidong's avatar
Chong Yidong committed
1008

Chong Yidong's avatar
Chong Yidong committed
1009
** Completion changes
Chong Yidong's avatar
Chong Yidong committed
1010

Chong Yidong's avatar
Chong Yidong committed
1011 1012 1013
*** The separator for `completing-read-multiple' can now be a regexp.
The default separator has been changed to allow surrounding spaces
around the comma.
Chong Yidong's avatar
Chong Yidong committed
1014

Chong Yidong's avatar
Chong Yidong committed
1015 1016 1017 1018
*** The `common-substring' arg of `display-completion-list' is obsolete.
Either use `completion-all-completions', which returns highlighted
strings (including for partial or substring completion), or call
`completion-hilit-commonality' to add the highlight.
1019

1020 1021 1022 1023
** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
let you enable symbol prettification (replacing a string like "lambda" with
the Greek lambda character).

Chong Yidong's avatar
Chong Yidong committed
1024
** Terminal changes
1025

1026
+++
Chong Yidong's avatar
Chong Yidong committed
1027 1028 1029
*** Functions to pop up menus and dialogs now work on all terminals,
including TTYs.  This includes `x-popup-menu', `x-popup-dialog',
`message-box', `yes-or-no-p', etc.
Eli Zaretskii's avatar
Eli Zaretskii committed
1030

1031 1032 1033 1034
The function `display-popup-menus-p' will now return non-nil for a
display or frame whenever a mouse is supported on that display or
frame.

Chong Yidong's avatar
Chong Yidong committed
1035 1036
*** New hook `tty-setup-hook'.

1037 1038 1039 1040 1041 1042 1043 1044 1045
** Window Handling

*** New display action function `display-buffer-no-window' to not
display the buffer in a window.

*** New display action alist entry `allow-no-window' to indicate the
caller of `display-buffer' is ready to handle the case of not
displaying the buffer in a window.

Chong Yidong's avatar
Chong Yidong committed
1046 1047
** New hook `pre-redisplay-function'.

1048
+++
1049 1050 1051 1052 1053 1054
** New bool-vector set operation functions:
*** `bool-vector-exclusive-or'
*** `bool-vector-union'
*** `bool-vector-intersection'
*** `bool-vector-set-difference'
*** `bool-vector-not'
Xue Fuqiao's avatar
Xue Fuqiao committed
1055
*** `bool-vector-subsetp'
1056 1057
*** `bool-vector-count-consecutive'
*** `bool-vector-count-population'
1058

1059
+++
1060 1061
** Comparison functions =, <, >, <=, >= now take many arguments.

Chong Yidong's avatar
Chong Yidong committed
1062
** Error-handling changes
1063

1064
+++
Chong Yidong's avatar
Chong Yidong committed
1065