NEWS 132 KB
Newer Older
1
GNU Emacs NEWS -- history of user-visible changes.
2

3
Copyright (C) 2010-2013 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

26
** Emacs can 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

31
** Emacs can 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

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

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.

48 49
** Emacs can be compiled with zlib support.  If this library is present
(which it normally is on most systems), the function
50 51
`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
+++
** The -L option, which normally prepends its argument to load-path,
will instead append, if the argument begins with `:'.

Glenn Morris's avatar
Glenn Morris committed
69

70
* Changes in Emacs 24.4
71

Eli Zaretskii's avatar
Eli Zaretskii committed
72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87
+++
** 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.)

88 89
** Key ? also describes prefix bindings like C-h.

90 91 92 93
+++
** `cache-long-line-scans' has been renamed to `cache-long-scans'
because it affects caching of paragraph scanning results as well.

94 95 96 97 98 99 100
+++
** `apropos-variable' is now `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.

101 102 103 104
+++
** `eval-defun' on an already defined defcustom calls the :set function,
if there is one.

105 106 107 108
** If the new variable `enable-dir-local-variables' is nil,
directory local variables are ignored.  May be useful for some modes
that want to ignore directory-locals while still respecting file-locals.

109 110 111 112
** 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.

113 114 115
** `initial-buffer-choice' can now specify a function to set up the
initial buffer.

116 117 118 119
** The *Messages* buffer is created in a new major mode `messages-buffer-mode',
and read-only.  Code that might create the *Messages* buffer should
call the function `messages-buffer' to do so and set the mode.

120 121 122 123 124 125 126 127
** `remember-notes' creates a buffer whose content is saved on kill-emacs.
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.

128 129
** `write-region-inhibit-fsync' now defaults to t in batch mode.

130 131 132 133 134
** ACL support has been added.
+++
*** Emacs preserves the ACL entries of files when backing up.
+++
*** New functions `file-acl' and `set-file-acl' get and set the ACL
135 136 137
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.
138

139
** New option `scroll-bar-adjust-thumb-portion'.
140 141 142
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).
143

144 145 146
** New function `add-face-text-property' has been added, which can be
used to conveniently prepend/append new face attributes to text.

147 148
** In compiled Lisp files, the header no longer includes a timestamp.

149 150 151 152 153 154
** 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.

155 156 157 158 159 160 161 162
*** 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'.

163 164 165 166
** New macro `alternatives-define' 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.

167 168 169 170 171
** The blink cursor stops blinking after 10 blinks (default) on X and NS.
You can change the default by customizing the variable blink-cursor-blinks.
Also timers for blinking are stopped when no blinking is done, so Emacs does
not consume CPU cycles.

172 173 174 175 176
** New command `frameset-to-register' is now bound to `C-x r f', replacing
`frame-configuration-to-register'.  It offers similar functionality, plus
some enhancements, like the ability to restore deleted frames.  Command
`frame-configuration-to-register' is still available, but unbound.

177 178 179
** The command `quail-help' is deleted.  Use `C-h C-\'
(`describe-input-method') instead.

180 181 182
** The default value of `comment-use-global-state' is changed to t,
and this variable has been marked obsolete.

183 184 185 186 187 188
** `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)

Glenn Morris's avatar
Glenn Morris committed
189

190
* Editing Changes in Emacs 24.4
191

192 193 194
** New command `rectangle-mark' makes a rectangular region.
Most commands are still unaware of it, but kill/yank do work on the rectangle.

195 196 197
** C-x TAB enters a transient interactive mode.
You can then use the left/right cursor keys to move the block of text.

Xue Fuqiao's avatar
Xue Fuqiao committed
198 199 200
** `tab-stop-list' is now implicitly extended to infinity by repeating
the last step.  Its default value is changed to nil which means a tab
stop every `tab-width' columns.
201

202 203 204 205 206
** `split-window' is no longer a command, just a non-interactive function.
As a command it was a special case of `split-window-below', and as such
superfluous.  After being reimplemented in Lisp, its interactive form
was mistakenly retained.

207 208
** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
bound to <f11> and M-<f10>, respectively.
209

210 211 212
** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
Eg View mode, etc.

213 214 215 216 217 218 219
+++
** 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.

220 221
** All register commands can now show help with preview.

222 223
** New command `kmacro-to-register' to store keyboard macros in registers.

224 225 226 227 228
** Shell Script mode

*** `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'.

229

230
* Changes in Specialized Modes and Packages in Emacs 24.4
231

232
** prolog-use-smie has been removed, along with the non-SMIE indentation code.
233

234 235 236 237 238 239
** SMIE indentation can be customized via `smie-config'.
The customizaton can be guessed by Emacs by providing a sample indented
file and letting SMIE learn from it.

** sh-script now uses its SMIE indentation algorithm by default.

240 241 242 243
** The debugger's `e' command evaluates the code in the context at point.
This includes using the lexical environment at point, which means that
`e' now lets you access lexical variables as well.

244 245 246 247 248 249 250 251 252 253 254 255
** `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'.

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
256 257 258
** If your Emacs is compiled with libxml2 support, you can use the new
built-in web browser `eww'.

259 260 261 262 263 264
** `remember' can now store notes in separates files
You can use the new function `remember-store-in-files' within the
`remember-handler-functions' option.

See `remember-data-directory' and `remember-directory-file-name-format'
for new options related to this function.
265

Johan Bockgård's avatar
Johan Bockgård committed
266
** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
Stefan Monnier's avatar
Stefan Monnier committed
267 268 269 270 271 272 273 274 275 276 277 278 279 280 281
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
282 283 284 285 286
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

287

288 289
** Delphi mode is now called OPascal mode.
*** All delphi-* variables and functions have been renamed to opascal-*.
Juanma Barranquero's avatar
Juanma Barranquero committed
290 291
*** `delphi-newline-always-indents' is not supported any more.
Use `electric-indent-mode' instead.
292 293
*** `delphi-tab' is gone, replaced by `indent-for-tab-command'.

294 295
** Eldoc Mode works properly in the minibuffer.

296 297
** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.

298 299 300
** completing-read-multiple's separator can now be a regexp.
The default separator is changed to allow surrounding spaces around the comma.

301 302 303 304
** Battery

*** Battery information via the BSD `apm' utility is now supported.

305 306 307 308
** Buffer Menu

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

309 310
** Calendar and Diary

311 312 313 314 315 316 317
*** New faces: `calendar-weekday-header', `calendar-weekend-header',
`calendar-month-header'.

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

*** The variable `calendar-font-lock-keywords' is obsolete.

318
+++
Glenn Morris's avatar
Glenn Morris committed
319
*** New variable `diary-from-outlook-function', used by the command
320 321
`diary-from-outlook'.

Xue Fuqiao's avatar
Xue Fuqiao committed
322
** VC and related modes
Xue Fuqiao's avatar
Xue Fuqiao committed
323

Xue Fuqiao's avatar
Xue Fuqiao committed
324 325 326 327 328 329
*** In VC directory mode, `D' displays diffs between VC-controlled
whole tree revisions.

*** In VC directory mode, `L' lists the change log for the current VC
controlled tree in a window.

330 331 332
*** In VC directory mode, `I' shows a log of changes that will be
received with a pull operation.

Xue Fuqiao's avatar
Xue Fuqiao committed
333 334 335
*** `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.
Xue Fuqiao's avatar
Xue Fuqiao committed
336

337 338 339
*** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
because it is moved to vc-cvs.el.

340 341 342 343 344 345 346
** cl-lib

*** New macro cl-tagbody.

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

347 348 349 350 351 352 353 354 355 356 357 358 359 360
** 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.

361 362
*** Support for ISO 8601 dates.

363 364 365 366 367
** Desktop

*** `desktop-auto-save-timeout' defines the number of seconds between
auto-saves of the desktop.

368
*** `desktop-restore-frames', enabled by default, allows saving and
369
restoring the frame/window configuration (frameset).  Additional options
370
`desktop-restore-in-current-display', `desktop-restore-reuses-frames'
371
and `desktop-restore-forces-onscreen' offer further customization.
372

373 374 375 376
** Dired

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

377 378 379 380 381 382
** 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.

383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398
** 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.

399 400 401
---
** New F90 mode option `f90-smart-end-names'.

Juanma Barranquero's avatar
Juanma Barranquero committed
402
** Icomplete is a bit more like Ido.
403 404 405
*** key bindings to navigate through and select the completions.
*** The icomplete-separator is customizable, and its default has changed.
*** Removed icomplete-show-key-bindings.
Xue Fuqiao's avatar
Xue Fuqiao committed
406 407 408 409
*** 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.

410

Xue Fuqiao's avatar
Xue Fuqiao committed
411 412
** Ido
*** Ido has a manual now.
Xue Fuqiao's avatar
Xue Fuqiao committed
413 414
*** `ido-use-virtual-buffers' takes a new value 'auto.
*** `ido-decorations' has been slightly extended to give a bit more control.
Xue Fuqiao's avatar
Xue Fuqiao committed
415

416
** Image mode
417 418 419 420 421

*** 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.

422 423 424 425
*** 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.

426 427
*** New commands to speed up, slow down, or reverse animation.

428 429 430 431 432 433
---
*** 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.

434 435 436 437 438 439
** Info

*** New face `info-index-match' is used to highlight matches in index
entries displayed by `Info-index-next', `Info-virtual-index' and
`info-apropos'.

440 441 442 443 444 445 446 447 448 449
** 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.

450
** Search and Replace
451

452 453 454 455
*** 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.

456 457 458
*** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
and adds it to the search string.

459 460 461
*** `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).
462

463 464 465
*** `query-replace' skips invisible text when `search-invisible' is nil,
and opens overlays with hidden text when `search-invisible' is `open'.

466 467 468 469
+++
*** By default, prefix arguments do not now terminate Isearch mode.
Set `isearch-allow-prefix' to nil to restore old behavior.

470 471 472 473
*** More Isearch commands accept prefix arguments, namely
`isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
`isearch-yank-line'.

474 475 476 477 478 479 480 481
*** 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.

Bill Wohler's avatar
Bill Wohler committed
482
** MH-E has been updated to MH-E version 8.5.
Bill Wohler's avatar
Bill Wohler committed
483 484
See MH-E-NEWS for details.

485 486 487 488 489 490 491 492
---
** The unrmail command converts from BABYL to mboxrd rather than mboxo.
Customize `unrmail-mbox-format' to change this.

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

493 494 495
+++
** New function `ses-rename-cell' to give SES cells arbitrary names.

496 497 498 499 500 501 502 503 504
** 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.

505 506
** New command `delete-duplicate-lines' has new types of operation:
When its arg ADJACENT is non-nil (when called interactively with C-u C-u)
507 508
it works like the utility `uniq'.  Otherwise by default it deletes
duplicate lines everywhere in the region without regard to adjacency.
Juanma Barranquero's avatar
Juanma Barranquero committed
509 510
When its arg KEEP-BLANKS is non-nil (when called interactively with
C-u C-u C-u), duplicate blank lines are preserved.
511

512 513 514 515 516
** New `cycle-spacing' command allows cycling between having just one
space, no spaces, or reverting to the original spacing.  Like
`just-one-space' command it can handle or ignore newlines and
leave different number of spaces.

517 518 519 520 521
** 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
522
- cross-category lists of items filtered by specific criteria;
523 524 525 526 527 528 529
- 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.
530
The Todo mode user manual describes all commands and most user options.
531 532 533 534 535 536
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.

537
** Tramp
538

539 540
*** The experimental url syntax for remote file names is withdrawn.

541 542
+++
*** New connection method "adb", which allows to access Android
543 544
devices by the Android Debug Bridge.  The variable `tramp-adb-program'
can be used to adapt the path of the "adb" program, if needed.
545

546 547 548 549
*** 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.
550

551 552 553
+++
*** Handlers for `file-acl' and `set-file-acl' for remote machines
which support POSIX ACLs.
554

555 556 557 558
+++
*** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
for remote machines which support filesystem notifications.

Glenn Morris's avatar
Glenn Morris committed
559 560 561 562 563 564
** VHDL mode

*** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.

*** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.

565 566 567
** Woman

*** The commands `woman-default-faces' and `woman-monochrome-faces'
Juanma Barranquero's avatar
Juanma Barranquero committed
568
are obsolete.  Customize the `woman-*' faces instead.
569

570 571
** Eshell

572
*** Added Eshell-Tramp module
573
External su and sudo commands are now the default; the internal,
574
Tramp-using variants can still be used by enabling the eshell-tramp
575 576
module.

577 578 579
** Package

*** The format of `archive-contents' files, generated by package
Dmitry Gutov's avatar
Dmitry Gutov committed
580 581
repositories, has changed to allow a new (fifth) element in the data
vectors, containing an associative list with extra properties.
582 583 584 585

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

586 587
** New term.el option `term-suppress-hard-newline'.

Chong Yidong's avatar
Chong Yidong committed
588 589 590 591
** Obsolete packages:

*** longlines.el is obsolete; use visual-line-mode instead.

Glenn Morris's avatar
Glenn Morris committed
592 593 594
+++
*** sup-mouse.el.

Chong Yidong's avatar
Chong Yidong committed
595 596
*** terminal.el is obsolete; use term.el instead.

597 598
*** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.

Michael Albinus's avatar
Michael Albinus committed
599 600
*** xesam.el.

Glenn Morris's avatar
Glenn Morris committed
601 602 603
+++
*** yow.el is obsolete; use fortune.el or cookie1.el instead.

Glenn Morris's avatar
Glenn Morris committed
604 605 606 607
---
*** The Info-edit command is obsolete.  Editing Info nodes by hand
has not been relevant for some time.

608 609 610 611 612 613 614
** Shell

*** `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.

615 616 617
+++
** There is a new macro `skip-unless' for skipping ERT tests.  See the manual.

618

619
* New Modes and Packages in Emacs 24.4
Juanma Barranquero's avatar
Juanma Barranquero committed
620

Ted Zlatanov's avatar
Ted Zlatanov committed
621 622 623 624 625
** New `superword-mode' in subword.el
`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.

626 627 628 629 630 631 632
** New nadvice.el package offering lighter-weight advice facilities.
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.

633 634 635 636 637 638
** New frameset.el package.
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
639 640
+++
** The package filenotify.el provides an interface for file system
641 642 643
notifications.  It requires, that Emacs is compiled with one of the
low-level libraries gfilenotify.c, inotify.c or w32notify.c.

Glenn Morris's avatar
Glenn Morris committed
644

645
* Incompatible Lisp Changes in Emacs 24.4
646

647 648
** `kill-region' lost its `yank-handler' optional argument.

649 650 651
** `(input-pending-p)' no longer runs other timers which are ready to
run.  The new optional CHECK-TIMERS param allows for the prior behavior.

652 653
** `defvar' and `defcustom' in a let-binding affect the "external" default.

654 655 656
** The syntax of ?» and ?« is now punctuation instead of matched parens.
Some languages match those as »...« and others as «...» so better stay neutral.

657 658 659 660
** The default file coding for Emacs Lisp files is now utf-8.
(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.
Xue Fuqiao's avatar
Xue Fuqiao committed
661
You should either convert them to utf-8 or add an explicit `coding:' cookie.
662

663 664 665 666
** overriding-terminal-local-map does not replace the local keymaps any more.
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
667
** Default process filters and sentinels are not nil any more.
668 669
Instead they default to a function which does what the nil value used to do.

670 671 672 673 674
** `read-event' does not return decoded chars in ttys any more.
Just as was the case in Emacs-22 and before, decoding of tty input according to
keyboard-coding-system is not performed in read-event any more.  But contrary
to that past, it is still done before input-decode-map/function-key-map/...

675 676
** Removed inhibit-local-menu-bar-menus.

677 678 679 680
** frame-local variables that affect redisplay do not work any more.
More specifically, the redisplay does not bother to check for a frame-local
value when looking up variables.

681 682 683 684
** nil and "unbound" are indistinguishable in symbol-function.
`symbol-function' never signals `void-function' any more.
`fboundp' returns non-nil if the symbol was `fset' to nil.

685 686
** `defadvice' does not honor the `freeze' flag and cannot advise
special-forms any more.
687

688 689 690 691
** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
VAR was bound to nil which was not tremendously useful and just lead to
spurious warnings about an unused var.

692 693 694 695 696 697
** 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'.

Paul Eggert's avatar
Paul Eggert committed
698 699 700
** `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.
701 702

** The cars of the elements in `interpreter-mode-alist' are now treated
703 704 705
as regexps rather than literal strings.  Technically this is an
incompatible change, but unless you are using interpreter-mode-alist
for something (not just adding elements to it), it ought not to affect you.
706

Glenn Morris's avatar
Glenn Morris committed
707

708
* Lisp Changes in Emacs 24.4
709

710 711
** New hook `pre-redisplay-function'.

712
+++
Eli Zaretskii's avatar
Eli Zaretskii committed
713 714
** Functions that pop up menus and dialogs now work on all terminal types,
including TTYs.
Eli Zaretskii's avatar
Eli Zaretskii committed
715 716 717
This includes `x-popup-menu', `x-popup-dialog', `message-box',
`yes-or-no-p', etc.

718 719 720 721
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.

722 723 724 725 726 727
** 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
728
*** `bool-vector-subsetp'
729 730 731
*** `bool-vector-count-matches'
*** `bool-vector-count-matches-at'

732 733
** Comparison functions =, <, >, <=, >= now take many arguments.

734 735 736
** The second argument of `eval' can now be a lexical-environment.

** `with-demoted-errors' takes an additional argument `format'.
737 738 739
+++
** New function `define-error'.

740 741
** New hook `tty-setup-hook'.

742 743 744
+++
** New macro with-eval-after-load.  Like eval-after-load, but better behaved.

745 746 747 748
** New library helpers.el for misc helper functions
*** `hash-table-keys'
*** `hash-table-values'

749
** Obsoleted functions:
750
*** `log10'
751 752 753 754
*** `dont-compile'
*** `lisp-complete-symbol'
*** `field-complete'
*** `minibuffer-completion-contents'
755 756
*** `isearch-nonincremental-exit-minibuffer'
*** `isearch-filter-visible'
757
*** `generic-make-keywords-list'
758

759 760 761 762 763 764
** `with-wrapper-hook' is obsoleted by `add-function'.
The few hooks that used with-wrapper-hook are replaced as follows:
*** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
*** `completion-in-region-function' obsoletes `completion-in-region-functions'.
*** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.

765 766 767
** `split-string' now takes an optional argument TRIM.
The value, if non-nil, is a regexp that specifies what to trim from
the start and end of each substring.
768

769 770
** `get-upcase-table' is obsoleted by the new `case-table-get-table'.

771 772 773
** Support for filesystem notifications.
Emacs now supports notifications of filesystem changes, such as
creation, modification, and deletion of files.  This requires the
774 775 776
`glib' API, or the 'inotify' API (on GNU/Linux systems only).  On
MS-Windows systems, this is supported for Windows XP and newer
versions.
777

778 779 780 781 782 783 784 785 786 787 788 789 790 791
** Changes in autorevert.el

---
*** If Emacs is compiled with file notification support, notifications
are used instead of checking the time stamp of the files.  You can
disable this by setting the user option `auto-revert-use-notify' to
nil.  Alternatively, a regular expression of directories to be
excluded from file notifications can be specified by
`auto-revert-notify-exclude-dir-regexp'.

---
*** The new user option `auto-revert-remote-files' enables reversion
of remote files when set to non-nil.

792 793
** Face changes

Juanma Barranquero's avatar
Juanma Barranquero committed
794
*** The function `face-spec-set' is now analogous to `setq' for face specs.
795 796 797 798 799 800 801
Its third arg now accepts values specifying exactly which face spec to
set (defface, custom, or user spec), and it directly sets the relevant
property using the supplied face spec.

*** Face specs set via Custom themes now replace the `defface' spec
rather than inheriting from it (as do face specs set via Customize).

802 803 804
*** New face characteristic (supports :underline (:style wave))
specifies whether or not the terminal can display a wavy line.

Jan Djärv's avatar
Jan Djärv committed
805
*** New face spec attribute :distant-foreground
Xue Fuqiao's avatar
Xue Fuqiao committed
806 807
specifies foreground to use if background color is near the foreground
color that would otherwise have been used.
Jan Djärv's avatar
Jan Djärv committed
808

809 810 811 812 813 814 815 816 817 818 819 820 821 822 823
** Image API

+++
*** `image-animated-p' is now `image-multi-frame-p'.
It returns non-nil for any image that contains multiple frames,
whether or not it specifies a frame delay.

+++
*** When animating images that do not specify a frame delay,
Emacs uses `image-default-frame-delay'.

+++
*** New functions `image-current-frame' and `image-show-frame' for getting
and setting the current frame of a multi-frame image.

824 825
*** You can change the speed of animated images.

826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854
** Changes in encoding and decoding of text

---
*** New coding-system `prefer-utf-8'.
This is like `undecided' but prefers UTF-8 on decoding if the text to
be decoded does not contain any invalid UTF-8 sequences.  On encoding,
any non-ASCII characters are automatically encoded as UTF-8.

---
*** New attributes of coding-systems whose type is `undecided'.
Two new attributes, `:inhibit-null-byte-detection' and
`:inhibit-iso-escape-detection', determine how to detect encoding of
text that includes null bytes and ISO-2022 escape sequences,
respectively.  Each of these attributes can be either nil, zero, or
t.  If it is t, decoding text ignores null bytes and, respectively,
ISO-2022 sequences.  If it is nil, null bytes cause text to be decoded
with no-conversion and ISO-2022 sequences cause Emacs to assume the
text is encoded in one of the ISO-2022 encodings, such as
iso-2022-7bit.  If the value is zero, Emacs consults the variables
inhibit-null-byte-detection and inhibit-iso-escape-detection, which
see.
The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
UTF-8 encoding and decoding, whenever possible.

These attributes are only meaningful for coding-systems of type
`undecided'.  (The type of a coding-system is determined by its
`:coding-type' attribute and can be accessed by calling the
`coding-system-type' function.)

Paul Eggert's avatar
Paul Eggert committed
855 856 857
** The function `set-visited-file-modtime' now accepts a 0 or -1 argument
with the same interpretation as the returned value of `visited-file-modtime'.

858
** time-to-seconds is not obsolete any more.
859
** New functions special-form-p and macrop.
860 861 862
** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
text-property on the first char.

863 864 865
** The `defalias-fset-function' property lets you catch calls to defalias
and redirect them to your own function instead of `fset'.

866
** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
867 868 869 870 871 872 873
When you edit DIR/FILE, Emacs normally creates a symbolic link
DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
is being edited.  Formerly, if there was already a non-symlink file
named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
through DIR/.#FILE.9.  These fallbacks have been removed, so that
Emacs now no longer locks DIR/FILE in that case.

874 875
On file systems that do not support symbolic links, the lock is now a
regular file with contents being what would have been in the symlink.
876

877 878 879 880 881 882 883 884 885 886 887
** The 9th element returned by `file-attributes' is now unspecified.
Formerly, it was t if the file's gid would change if file were deleted
and recreated.  This value has been inaccurate for years on many
platforms, and nobody seems to have noticed or cared.

** The function `file-ownership-preserved-p' now has an optional
argument GROUP which causes it check for file group too.  This can be
used in place of the 9th element of `file-attributes'.

** New functions `group-gid' and `group-real-gid'.

888 889 890 891
** The 6th argument to `copy-file' has been renamed to
`preserve-extended-attributes' as it now handles both SELinux context
and ACL entries.

892 893 894 895 896
** The `common-substring' argument of display-completion-list is obsolete.
Either use `completion-all-completions' which already returns highlighted
strings (including for partial or substring completion) or call
`completion-hilit-commonality' to add the highlight.

897 898 899
** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4

*** The package descriptor and name of global variables, constants,
Paul Eggert's avatar
Paul Eggert committed
900
and functions should be separated by two hyphens if the symbol is not
901 902
meant to be used by other packages.

Glenn Morris's avatar
Glenn Morris committed
903

904
* Changes in Emacs 24.4 on Non-Free Operating Systems
905

906 907 908 909
** The procedure for building Emacs on MS-Windows has changed.
It is now built by running the same configure script as on all other
platforms.  This requires the MSYS environment and MinGW development
tools.  See the updated instructions in nt/INSTALL for details.
910 911 912 913 914 915 916 917 918 919 920 921 922

Using the Posix configure script and Makefile's also means a change in
the directory structure of the Emacs installation on Windows.  It is
now the same as on GNU and Unix systems.  In particular, the auxiliary
programs, such as cmdproxy.exe and hexl.exe, are in
libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
version), version-independent site-lisp is in share/emacs/site-lisp,
version-specific Lisp files are in share/emacs/VERSION/lisp and in
share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
files are in share/emacs/VERSION/etc.  (Emacs knows about all these
directories and will find the files in there automatically; there's no
need to set any variables due to this change.)

923 924 925 926 927
+++
** The "generate a backtrace on fatal error" feature now works on MS Windows.
The backtrace is written to the 'emacs_backtrace.txt' file in the
directory where Emacs was running.

928 929 930 931 932 933
+++
** The variable `buffer-file-type' is no longer supported.
Setting it has no effect, and %t in the mode-line format is ignored.
Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
modifying it has no effect.

934 935 936 937 938 939 940
---
** Lock files now work on MS-Windows.
This allows to avoid losing your edits if the same file is being
edited in another Emacs session or by another user.  See the node
"Interlocking" in the Emacs User Manual for the details.  To disable
file locking, customize `create-lockfiles' to nil.

Glenn Morris's avatar
Glenn Morris committed
941 942 943 944 945
** Improved fullscreen support on Mac OS X.
Both native (>= OSX 10.7) and "old style" fullscreen are supported.
Customize `ns-use-native-fullscreen' to change style.  For >= 10.7
native is the default.

Glenn Morris's avatar
Glenn Morris committed
946

947
* Installation Changes in Emacs 24.3
948

949
** The default X toolkit is now Gtk+ version 3.
Glenn Morris's avatar
Glenn Morris committed
950 951 952
If you don't pass `--with-x-toolkit' to configure, or if you use
`--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
Glenn Morris's avatar
Glenn Morris committed
953
You can explicitly require a specific version by passing
Glenn Morris's avatar
Glenn Morris committed
954
`--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
955

956
** New configure option `--enable-link-time-optimization', to utilize
957 958
an appropriate feature provided by GCC since version 4.5.0.

Glenn Morris's avatar
Glenn Morris committed
959 960
** New configure option `--without-all' to disable most of the optional
features (image support, etc.) that are normally enabled by default.
961

Glenn Morris's avatar
Glenn Morris committed
962 963
** New configure option `--enable-gcc-warnings' (for developing/debugging
Emacs).  If building with GCC, this enables compile-time checks that
Glenn Morris's avatar
Glenn Morris committed
964 965 966
warn/give errors about possibly-questionable C code.  On a recent GNU
system there should be no warnings; on older and on non-GNU systems
the results may be useful to developers.
967

Glenn Morris's avatar
Glenn Morris committed
968
** The configure option `--enable-use-lisp-union-type' has been
969
renamed to `--enable-check-lisp-object-type', as the resulting
Glenn Morris's avatar
Glenn Morris committed
970 971 972
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
973
** The configure option `--disable-maintainer-mode' has been removed,
974 975
as it was confusingly-named and rarely useful.

Glenn Morris's avatar
Glenn Morris committed
976 977 978 979 980
** The configure options `--program-prefix', `--program-suffix', and
`--program-transform-name' apply to more than just the installed
binaries.  Now they also affect the man pages, icons, and the
etc/emacs.desktop file; but not the info pages, since this would break
links between the various manuals.
981

Glenn Morris's avatar
Glenn Morris committed
982 983
** You can use `NO_BIN_LINK=t make install' to prevent the installation
overwriting "emacs" in the installation bin/ directory with a link
984
to "emacs-VERSION".
Glenn Morris's avatar
Glenn Morris committed
985

986 987
** Emacs uses libtinfo in preference to libncurses, if available.

988 989 990 991
** 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.

992
** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
Glenn Morris's avatar
Glenn Morris committed
993 994 995
(from the bin and libexec directories, respectively).  The former is
no longer relevant, the latter is replaced by lisp (in vc-sccs.el).

Glenn Morris's avatar
Glenn Morris committed
996

997
* Startup Changes in Emacs 24.3
998 999 1000

** Emacs no longer searches for `leim-list.el' files beneath the standard
lisp/ directory.  There should not be any there anyway.  If you have
Glenn Morris's avatar
Glenn Morris committed
1001
been adding them there, put them somewhere else; e.g., site-lisp.
1002

Glenn Morris's avatar
Glenn Morris committed
1003 1004
** The `--no-site-lisp' command line option now works for Nextstep builds.

Glenn Morris's avatar
Glenn Morris committed
1005

1006
* Changes in Emacs 24.3
Glenn Morris's avatar
Glenn Morris committed
1007

1008
** Help
1009

1010
*** `C-h f' (`describe-function') can now perform autoloading.
1011 1012 1013 1014 1015 1016 1017 1018 1019
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).

1020
** ImageMagick
1021

1022 1023
*** Images displayed via ImageMagick now support transparency and the
:background image specification property.
1024

1025
*** When available, ImageMagick support is automatically enabled.
1026 1027
It is no longer necessary to call `imagemagick-register-types'
explicitly to install ImageMagick image types; that function is called
1028
automatically at startup, or when customizing an imagemagick- option.
Glenn Morris's avatar
Glenn Morris committed
1029

1030
*** Setting `imagemagick-types-inhibit' to t now disables the use of
Glenn Morris's avatar
Glenn Morris committed
1031 1032
ImageMagick to view images.  (You must call `imagemagick-register-types'
afterwards if you do not use customize to change this.)
Glenn Morris's avatar
Glenn Morris committed
1033

1034
*** The new variable `imagemagick-enabled-types' also affects which
1035 1036 1037
ImageMagick types are treated as images.  The function
`imagemagick-filter-types' returns the list of types that will be
treated as images.
1038

1039 1040 1041
*** ImageMagick images now support the :max-width and :max-height
keywords.

1042
*** Some data types aren't auto-detected by ImageMagick.  Adding
1043 1044
:format to `create-image' may help if the content type is in the
new variable `image-format-suffixes'.
1045

1046 1047 1048 1049
** Minibuffer

*** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
next and previous path separator, respectively.
1050

1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064
*** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
in minibuffer prompts.  Just set `minibuffer-eldef-shorten-default'
non-nil before enabling the mode.

** Mode line

*** 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.

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

** Server and client
Glenn Morris's avatar
Glenn Morris committed
1065

Chong Yidong's avatar
Chong Yidong committed
1066 1067 1068
*** emacsclient now obeys string values for `initial-buffer-choice',
if it is told to open a new frame without specifying any file to visit
or expression to evaluate.
Glenn Morris's avatar
Glenn Morris committed
1069

Chong Yidong's avatar
Chong Yidong committed
1070 1071 1072 1073 1074
*** New option `server-auth-key' specifies a shared server key.

** Emacs now generates backtraces on fatal errors.
On encountering a fatal error, Emacs now outputs a textual description
of the fatal signal, and a short backtrace on platforms like glibc
1075
that support backtraces.
1076

1077 1078 1079 1080 1081 1082 1083 1084 1085 1086
** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
This minor mode replaces `toggle-read-only', which is now obsolete.

** Most `y-or-n' prompts now allow you to scroll the selected window.
Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
respectively, without exiting from the prompt.

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

Chong Yidong's avatar
Chong Yidong committed
1087 1088
** If your Emacs was built from a bzr checkout, the new variable
`emacs-bzr-version' contains information about the bzr revision used.
1089

1090
** New option `create-lockfiles' specifies usage of lockfiles.
Chong Yidong's avatar
Chong Yidong committed
1091 1092
It defaults to t.  Changing it to nil inhibits the creation of lock
files (use this with caution).
1093

1094 1095
** New option `enable-remote-dir-locals', if non-nil, allows directory-local
variables on remote hosts.
1096

Chong Yidong's avatar
Chong Yidong committed
1097 1098 1099
** The entry for PCL-CVS has been removed from the Tools menu.
The PCL-CVS commands are still available via the keyboard.

1100