NEWS 154 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:
Glenn Morris's avatar
Glenn Morris committed
18 19
+++ indicates that all necessary documentation updates are complete.
    (This means all relevant manuals in doc/ AND lisp doc-strings.)
20
--- means no change in the manuals is needed.
Glenn Morris's avatar
Glenn Morris committed
21
When you add a new item, use the appropriate mark if you are sure it applies,
22
otherwise leave it unmarked.
Glenn Morris's avatar
Glenn Morris committed
23

24 25 26

* Installation Changes in Emacs 24.5

Glenn Morris's avatar
Glenn Morris committed
27
+++
Paul Eggert's avatar
Paul Eggert committed
28 29
** Building Emacs now requires C99 or later.

30
** Building Emacs now requires GNU make, version 3.81 or later.
Glenn Morris's avatar
Glenn Morris committed
31

Paul Eggert's avatar
Paul Eggert committed
32 33 34 35 36 37 38
** By default, Emacs no longer works on IRIX.  We expect that Emacs
users are not affected by this, as SGI stopped supporting IRIX in
December 2013.  If you are affected, please send a bug report.  You
should be able to work around the problem either by porting the Emacs
undumping code to GCC under IRIX, or by configuring --with-wide-int,
or by sticking with Emacs 24.4.

39 40
---
** The configure option `--with-pkg-config-prog' has been removed.
41
Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to.
42

43 44 45 46 47 48

* Startup Changes in Emacs 24.5


* Changes in Emacs 24.5

49 50 51
---
** The default value of `history-length' has increased to 100.

52 53 54 55 56
+++
** The new variable `term-file-aliases' replaces some files from lisp/term.
The function `tty-run-terminal-initialization' consults this variable
when deciding what terminal-specific initialization code to run.

57 58 59 60 61
---
** New variable `system-configuration-features', listing some of the
main features that Emacs was compiled with.  This is mainly intended
for use in Emacs bug reports.

62 63 64

* Editing Changes in Emacs 24.5

Glenn Morris's avatar
Glenn Morris committed
65
** Emacs now supports "bracketed paste mode" when running on a terminal
66
that supports it.  This facility allows Emacs to understand pasted
Glenn Morris's avatar
Glenn Morris committed
67 68 69
chunks of text as strings to be inserted, instead of interpreting each
character in the pasted text as actual user input.  This results in a
paste experience similar to that under a window system, and significant
70 71
performance improvements when pasting large amounts of text.

72 73

* Changes in Specialized Modes and Packages in Emacs 24.5
74

75 76 77 78
** Rectangle editing
*** Rectangle Mark mode can have corners past EOL or in the middle of a TAB.
*** C-x C-x in rectangle-mark-mode now cycles through the four corners.
*** `string-rectangle' provides on-the-fly preview of the result.
79

Glenn Morris's avatar
Glenn Morris committed
80 81
** New font-lock functions font-lock-ensure and font-lock-flush, which
should be used instead of font-lock-fontify-buffer when called from Elisp.
82

83 84 85 86 87
** Calendar and diary

+++
*** New commands to insert diary entries with Chinese dates:
`diary-chinese-insert-anniversary-entry' `diary-chinese-insert-entry'
Glenn Morris's avatar
Glenn Morris committed
88
`diary-chinese-insert-monthly-entry', `diary-chinese-insert-yearly-entry'.
89 90

+++
Glenn Morris's avatar
Glenn Morris committed
91 92 93 94 95 96 97 98
*** Calendar can list and mark diary entries with Chinese dates.
See `diary-chinese-list-entries' and `diary-chinese-mark-entries'.

---
** The Rmail commands d, C-d and u now handle repeat counts to delete or
undelete multiple messages.

** SES now supports local printer functions; see `ses-define-local-printer'.
99

Glenn Morris's avatar
Glenn Morris committed
100 101 102
** In sh-mode, you can now use `sh-shell' as a file-local variable to
specify the type of shell in use (bash, csh, etc).

103 104 105 106
** The URL package accepts now the protocols "ssh", "scp" and "rsync".
When `url-handler-mode' is enabled, file operations for these
protocols as well as for "telnet" and "ftp" are passed to Tramp.

107 108 109 110
** Tramp

*** New connection method "nc", which allows to access dumb busyboxes.

Glenn Morris's avatar
Glenn Morris committed
111 112 113 114 115
** Obsolete packages

---
*** gulp.el

116 117 118 119 120
---
*** crisp.el, tpu-edt.el, ws-mode.el
These emulations of old editors are believed to be no longer relevant
 - contact emacs-devel@gnu.org if you disagree.

Glenn Morris's avatar
Glenn Morris committed
121 122 123
---
*** vi.el, vip.el (try M-x viper instead)

124 125 126 127 128 129

* New Modes and Packages in Emacs 24.5


* Incompatible Lisp Changes in Emacs 24.5

Glenn Morris's avatar
Glenn Morris committed
130
** window-configurations no longer record the buffers's marks.
131

Glenn Morris's avatar
Glenn Morris committed
132
** inhibit-modification-hooks now also inhibits lock-file checks, as well as
133 134
active region handling.

135 136
** deactivate-mark is now buffer-local.

Glenn Morris's avatar
Glenn Morris committed
137
** `cl-the' now asserts that its argument is of the given type.
138

139 140 141 142 143 144
+++
** Mouse click events on mode line or header line no longer include
any reference to a buffer position.  The 6th member of the mouse
position list returned for such events is now nil.


145 146 147

* Lisp Changes in Emacs 24.5

148 149 150 151
** New function `funcall-interactively', which works like `funcall'
but makes `called-interactively-p' treat the function as (you guessed it)
called interactively.

152 153
** New function `function-put' to use instead of `put' for function properties.

154
+++
155
** New properties that can be specified with `declare':
Glenn Morris's avatar
Glenn Morris committed
156
*** (interactive-only INSTEAD), says to use INSTEAD for non-interactive use.
157 158 159
*** (pure VAL), if VAL is non-nil, indicates the function is pure.
*** (side-effect-free VAL), if VAL is non-nil, indicates the function does not
have side effects.
160

161 162 163 164
+++
** New macro `with-file-modes', for evaluating expressions with default file
permissions set to temporary values (e.g., for creating private files).

165
** You can access the slots of structures using `cl-struct-slot-value'.
Daniel Colascione's avatar
Daniel Colascione committed
166

167 168 169
** Functions `rmail-delete-forward' and `rmail-delete-backward' take an
optional repeat-count argument.

170 171 172

* Changes in Emacs 24.5 on Non-Free Operating Systems

Glenn Morris's avatar
Glenn Morris committed
173 174 175 176 177
---
** Building Emacs for MS-Windows requires at least Windows XP
or Windows Server 2003.  The built binaries still run on all versions
of Windows starting with Windows 9X.

178 179

* Installation Changes in Emacs 24.4
180

181
** Emacs can now be compiled with ACL (access control list) support.
182 183
This happens by default if a suitable support library is found at
build time, like libacl on GNU/Linux.  To prevent this, use the
184
configure option `--disable-acl'.  See below for the features this provides.
185

Chong Yidong's avatar
Chong Yidong committed
186
** Emacs can now be compiled with file notification support.
187 188
This happens by default if a suitable system library is found at
build time.  To prevent this, use the configure option
189
`--without-file-notification'.  See below for file-notify features.
Glenn Morris's avatar
Glenn Morris committed
190 191 192 193 194 195
This feature is not available for the Nextstep port.

** Emacs can now be compiled with zlib support.
This happens by default if zlib is present, which it normally is.
To prevent this, use the configure option `--without-zlib'.
This provides the function `zlib-decompress-region'; see below for details.
196

Chong Yidong's avatar
Chong Yidong committed
197 198
** The configure option `--without-compress-info' has been generalized,
and renamed to `--without-compress-install'.  It now prevents compression
199 200
of _any_ files during installation.

Chong Yidong's avatar
Chong Yidong committed
201
** The configure option `--with-crt-dir' has been removed.
202
It is no longer needed, as the crt*.o files are no longer linked specially.
203

204 205 206
** Directories passed to configure option `--enable-locallisppath' are
no longer created during installation.

207
** Emacs for Nextstep (Mac OS X, GNUstep) can be built with ImageMagick support.
Glenn Morris's avatar
Glenn Morris committed
208
This requires pkg-config to be available at build time.
209

Glenn Morris's avatar
Glenn Morris committed
210

211
* Startup Changes in Emacs 24.4
Glenn Morris's avatar
Glenn Morris committed
212

213 214 215 216 217 218 219 220 221
** 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.)

222
** The -L option, which normally prepends its argument to load-path,
223 224
will instead append, if the argument begins with `:' (or `;' on MS Windows;
i.e., `path-separator').
225

226 227 228 229 230
** 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
231 232 233
** The user option `initial-buffer-choice' can now specify a function
to set up the initial buffer.

Glenn Morris's avatar
Glenn Morris committed
234

235
* Changes in Emacs 24.4
236

237 238 239 240 241
** Support for ACLs (access control lists).
This requires a suitable support library to be found at build time.
On GNU/Linux, the POSIX ACL interface is used via libacl.
On MS-Windows, the NT Security APIs are used to emulate the POSIX interface.
ACLs are extended file attributes, used e.g. for finer-grained permissions.
Glenn Morris's avatar
Glenn Morris committed
242

243
*** Emacs preserves the ACL entries of files when backing up.
244

245 246 247
*** New functions `file-acl' and `set-file-acl' get and set file ACLs.

** Support for menus on text-mode terminals.
Eli Zaretskii's avatar
Eli Zaretskii committed
248 249
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
250 251
menu defined at that position.  Likewise, clicking C-mouse-1, C-mouse-2, or
C-mouse-3 on the text area will pop up the menus defined for those locations.
Eli Zaretskii's avatar
Eli Zaretskii committed
252 253 254 255

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'.

256
If you want the previous behavior, where F10 invoked `tmm-menubar',
Eli Zaretskii's avatar
Eli Zaretskii committed
257
customize the option `tty-menu-open-use-tmm' to a non-nil value.
Glenn Morris's avatar
Glenn Morris committed
258 259
(Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
is nil.)
Eli Zaretskii's avatar
Eli Zaretskii committed
260

261 262 263 264 265
** New option `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.
266

267
** Multi-monitor support
268 269 270 271 272

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

273 274 275
*** 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
276
as if they were on X.  To get information for each physical
277 278 279 280
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'.

281 282 283 284 285 286 287 288 289
** New function `zlib-decompress-region', which decompresses gzip- and
zlib-format compressed data using built-in zlib support (if available).

** 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.

** The cursor stops blinking after 10 blinks (by default) on X and Nextstep.
Chong Yidong's avatar
Chong Yidong committed
290
You can change the default by customizing `blink-cursor-blinks'.
291

Chong Yidong's avatar
Chong Yidong committed
292 293 294
** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
This affects View mode, etc.

Glenn Morris's avatar
Glenn Morris committed
295
** The default value of `make-backup-file-name-function' is no longer nil.
Glenn Morris's avatar
Glenn Morris committed
296 297
Instead it defaults to a function that does what the nil value used to.

298
** Help
Glenn Morris's avatar
Glenn Morris committed
299

Chong Yidong's avatar
Chong Yidong committed
300
*** The command `apropos-variable' is renamed to `apropos-user-option'.
301
`apropos-user-option' shows all user options, while `apropos-variable'
Chong Yidong's avatar
Chong Yidong committed
302 303 304
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.
305

Chong Yidong's avatar
Chong Yidong committed
306
*** The key `?' now describes prefix bindings, like `C-h'.
307

Glenn Morris's avatar
Glenn Morris committed
308
*** The command `describe-function' has been extended for EIEIO.
309
Running it on constructors will show a full description of the
David Engster's avatar
David Engster committed
310
generated class.  For generic functions, it will show all
311 312 313 314
implementations together with links to the source.  The old commands
`describe-class', `describe-constructor' and `describe-generic' were
removed.

315
*** The function `quail-help' is no longer an interactive command.
Glenn Morris's avatar
Glenn Morris committed
316
Use `C-h C-\' (`describe-input-method') instead.
317

Glenn Morris's avatar
Glenn Morris committed
318
** Frame and window handling
319

Chong Yidong's avatar
Chong Yidong committed
320 321
*** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
bound to <f11> and M-<f10>, respectively.
322

Chong Yidong's avatar
Chong Yidong committed
323 324 325
*** New hooks `focus-in-hook', `focus-out-hook'.
These are normal hooks run when an Emacs frame gains or loses input focus.

326 327 328 329
*** The function `window-in-direction' now takes additional arguments
for specifying a reference point, wrapping the selection around frame
borders, and specifying ways to select the minibuffer window.

Glenn Morris's avatar
Glenn Morris committed
330 331 332 333 334 335 336 337 338 339 340 341 342 343 344
*** Emacs can now change frame sizes in units of pixels, rather than
text rows or columns.  When maximizing a frame or making it fullscreen,
remaining extra pixels are no longer given to the minibuffer, the rightmost
fringe, or other unusable space, but are distributed among the text
areas of the frame's windows.  If the new option `frame-resize-pixelwise'
is non-nil, all frame size changes happen pixelwise and set the
corresponding size hints for the window manager.

*** Emacs can now change window sizes in units of pixels.
Mouse-dragging a mode line or window divider now changes the size of
adjacent windows pixelwise.  If the new option `window-resize-pixelwise'
is non-nil, functions like `balance-windows-area' and `fit-window-to-buffer'
resize windows pixelwise.  Most functions for changing or accessing
window sizes now have an additional argument that allows changes to apply,
or values to be returned, in pixels instead of lines/columns.
345

346 347 348 349
*** The functions `window-body-height' and `window-body-width' now never
count partially visible lines or columns if called with a nil PIXELWISE
argument.

350 351 352 353 354 355 356 357 358 359
*** Emacs can now draw dividers between adjacent windows.  To put
dividers between side-by-side/vertically stacked windows customize the
frame parameters `right-divider-width' and `bottom-divider-width' to
some positive integer.  You can drag dividers with the mouse (they show
a corresponding cursor when the mouse hovers over them).  You can change
the appearance of dividers by customizing the faces `window-divider',
`window-divider-first-pixel', and `window-divider-last-pixel'.  The last
two are useful to provide a 3D effect, or to better distinguish dividers
from surrounding display objects.

360 361 362
*** New functions to return the pixel sizes of window components, namely
`window-scroll-bar-width', `window-mode-line-height',
`window-header-line-height', `window-right-divider-width', and
363 364 365 366 367 368 369
`window-bottom-divider-width'.

*** The new function `window-text-pixel-size' returns the size of the
text of a window's buffer in pixels.  This allows functions like
`fit-frame-to-buffer' and `fit-window-to-buffer' to accurately fit a
window to its buffer as it will be displayed.

370
*** `fit-window-to-buffer' can now resize windows in both dimensions.
371
This behavior is controlled by the new option
372
`fit-window-to-buffer-horizontally'.  The new option
373
`fit-frame-to-buffer' allows you to fit the window's frame to its buffer.
374

375 376
*** `fit-frame-to-buffer' now fits frames in both dimensions.  The new
options `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes'
377 378
control the size of the frame and its position on screen.

379 380 381 382 383 384
*** Temp Buffer Resize Mode can now adjust the height and width of
windows and frames.  The new option `temp-buffer-max-width' allows you to
control the width of temporary buffer windows.  Moreover, if the new
option `fit-frame-to-buffer' is non-nil and the buffer appears in the
root window of a frame, Temp Buffer Resize Mode will try to adjust the
width and/or height of the frame.
385

Chong Yidong's avatar
Chong Yidong committed
386 387 388 389
*** `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.
390

391 392 393
*** The functions `window-size' and `window-total-size' now have an
optional argument to return a rounded size value.

394
*** `window-state-put' now allows you to put a window state into internal
395 396
windows too.

Chong Yidong's avatar
Chong Yidong committed
397
*** New option `scroll-bar-adjust-thumb-portion'.
398 399
Available only on X, this option allows you to control over-scrolling
using the scroll bar (i.e., dragging the thumb down even when the end
Chong Yidong's avatar
Chong Yidong committed
400 401
of the buffer is visible).

402
*** New display actions functions for `display-buffer':
403

404 405
**** `display-buffer-in-previous-window' displays a buffer in a window
previously showing that buffer.
406

407 408
**** `display-buffer-at-bottom' chooses or creates a window at the
bottom of the selected frame.
409

410
**** `display-buffer-no-window' to not display the buffer in a window.
Xue Fuqiao's avatar
Xue Fuqiao committed
411 412

*** New display action alist entry `allow-no-window' to indicate the
413 414
caller of `display-buffer' is ready to handle the case of not displaying
the buffer in a window.
Xue Fuqiao's avatar
Xue Fuqiao committed
415

Glenn Morris's avatar
Glenn Morris committed
416
** Lisp evaluation
417

Chong Yidong's avatar
Chong Yidong committed
418 419 420
*** `eval-defun' on an already defined defcustom calls the :set function,
if there is one.

Glenn Morris's avatar
Glenn Morris committed
421
*** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
422 423 424
and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
zero prefix argument.  This disables truncation of lists in the output,
equivalent to setting `(eval-expression-)print-length' and
Xue Fuqiao's avatar
Xue Fuqiao committed
425
`(eval-expression-)print-level' to nil.  Additionally, it causes integers
426
to be printed in other formats (octal, hexadecimal, and character).
Chong Yidong's avatar
Chong Yidong committed
427

428 429 430
*** New hook `eval-expression-minibuffer-setup-hook' run by
`eval-expression' on entering the minibuffer.

431
** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
Chong Yidong's avatar
Chong Yidong committed
432
because it affects caching of paragraph scanning results as well.
433
There is no reason to set this to nil except for debugging purposes.
434

435 436
** `emacs-bzr-version' has been renamed to `emacs-repository-version',
and works for git too, if you fetch the repository notes.
Chong Yidong's avatar
Chong Yidong committed
437

Glenn Morris's avatar
Glenn Morris committed
438
** The default value of `comment-use-global-state' is now t,
Chong Yidong's avatar
Chong Yidong committed
439 440
and this variable has been marked obsolete.

441
** `write-region-inhibit-fsync' now defaults to t in batch mode.
Glenn Morris's avatar
Glenn Morris committed
442

443 444 445
** 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.
Chong Yidong's avatar
Chong Yidong committed
446

Chong Yidong's avatar
Chong Yidong committed
447 448 449

* Editing Changes in Emacs 24.4

Glenn Morris's avatar
Glenn Morris committed
450
** Indentation
Chong Yidong's avatar
Chong Yidong committed
451

452
*** `electric-indent-mode' is now enabled by default.
453 454 455
Typing RET reindents the current line and indents the new line.
`C-j' inserts a newline but does not indent.  In some programming modes,
additional characters are electric (eg `{').
456

Glenn Morris's avatar
Glenn Morris committed
457 458
*** New buffer-local `electric-indent-local-mode'.

Chong Yidong's avatar
Chong Yidong committed
459 460 461 462 463
*** 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.
464

Chong Yidong's avatar
Chong Yidong committed
465
*** `tab-stop-list' is now implicitly extended to infinity by repeating
Glenn Morris's avatar
Glenn Morris committed
466
the last step.  Its default value is changed to nil, which means a tab
Xue Fuqiao's avatar
Xue Fuqiao committed
467
stop every `tab-width' columns.
468

Glenn Morris's avatar
Glenn Morris committed
469
** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
Glenn Morris's avatar
Glenn Morris committed
470 471 472 473
In other words, if you visit two files that have the same base name,
then rather than creating buffers basename and basename<2>,
Emacs uses basename<dirA> and basename<dirB>.  To change this,
customize `uniquify-buffer-name-style'.  Set it to nil for the old behavior.
Chong Yidong's avatar
Chong Yidong committed
474 475 476

** 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.
477

478 479 480 481 482 483
** 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.

484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500
** New command `delete-duplicate-lines'.
This searches the region for identical lines, and removes all but one
copy of each repeated line.  The lines need not be sorted.

** New command `cycle-spacing' acts like a smarter `just-one-space'.
When called in succession, it cycles between spacing conventions:
one space, no spaces, original spacing.

** `blink-matching-paren' now only highlights the matching open-paren
by default, instead of moving the cursor.  Set this variable to `jump' to
restore the old behavior.

** The new function `fill-single-char-nobreak-p' can stop fill from breaking
a line after a one-letter word, which is an error in some typographical
conventions.  To use it, add it to the `fill-nobreak-predicate' hook.

** Registers
501

502 503 504
*** All interactive commands that read a register (`copy-to-register', etc.)
now display a temporary window after `register-preview-delay' seconds
that summarizes existing registers.  To disable this, set that option to nil.
505 506
Interactive commands that read registers and want to make use of this
should use `register-read-with-preview' to read register names.
507

Glenn Morris's avatar
Glenn Morris committed
508 509 510 511 512 513
*** New command `frameset-to-register' bound to `C-x r f', replacing
`frame-configuration-to-register'.  It offers similar functionality,
plus enhancements like the ability to restore deleted frames.
(`frame-configuration-to-register' still exists, but no longer has a
key binding.)

514 515
*** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
macros in registers.
516

517

518
* Changes in Specialized Modes and Packages in Emacs 24.4
519

Chong Yidong's avatar
Chong Yidong committed
520
** Backtrace and debugger
521

Glenn Morris's avatar
Glenn Morris committed
522
*** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
523
display of local variables of the current stack frame.
Glenn Morris's avatar
Glenn Morris committed
524 525 526 527

*** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
the lexical environment when evaluating the code in the context at point
(and so allows you to access lexical variables).
528

Glenn Morris's avatar
Glenn Morris committed
529
*** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
530

531
** Battery information can now be retrieved from BSD's `apm' utility.
532

533
** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
534

535 536 537 538 539 540 541 542
** 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.

Glenn Morris's avatar
Glenn Morris committed
543 544
*** The new option `calc-gregorian-switch' lets you configure if
(and when) Calc switches from the Julian to the Gregorian calendar.
545

546 547
*** Support for ISO 8601 dates.

548 549 550 551 552 553 554 555 556 557 558 559
** Calendar and Diary

*** New faces `calendar-weekday-header', `calendar-weekend-header',
and `calendar-month-header'.

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

*** New variable `diary-from-outlook-function', used by the command
`diary-from-outlook'.

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

Chong Yidong's avatar
Chong Yidong committed
560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576
** 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++.
577
They are also displayed by the summarize feature in the mode line.
Chong Yidong's avatar
Chong Yidong committed
578 579 580 581

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

582 583
**** Parsing of C/C++ preprocessor macros that open new scope.
For example, this enables parsing of macros that open new namespaces.
Chong Yidong's avatar
Chong Yidong committed
584 585 586

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

587 588 589 590 591 592 593 594
** 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 your version doesn't support that option.  See option `cfengine-cf-promises'.

Chong Yidong's avatar
Chong Yidong committed
595 596
** cl-lib

597
*** New macro `cl-tagbody'.
598
This executes statements while allowing for control transfer to labels.
Chong Yidong's avatar
Chong Yidong committed
599 600 601 602 603

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

** CUA mode

Chong Yidong's avatar
Chong Yidong committed
604
*** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
Glenn Morris's avatar
Glenn Morris committed
605 606
Hence, you can now enable it independently from those modes, and from
`transient-mark-mode'.
Chong Yidong's avatar
Chong Yidong committed
607 608 609

*** `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
610

611 612
*** CUA's rectangles can now be used without CUA by calling the command
`cua-rectangle-mark-mode'.
Chong Yidong's avatar
Chong Yidong committed
613

614
** Delete Selection mode can now be used without Transient Mark mode.
Chong Yidong's avatar
Chong Yidong committed
615

616 617
** Desktop

Glenn Morris's avatar
Glenn Morris committed
618 619 620
*** `desktop-save-mode' by default now auto-saves an existing desktop file
after `desktop-auto-save-timeout'.  To disable this, customize that option
to nil (or zero).
621

622 623 624 625
*** Desktop now saves and restores the frame/window configuration.
To disable this, set `desktop-restore-frames' to nil.
See also related options `desktop-restore-reuses-frames',
`desktop-restore-in-current-display', and `desktop-restore-forces-onscreen'.
626

627
** New Dired minor mode `dired-hide-details-mode' toggles whether details,
628 629 630
such as file ownership or permissions, are visible in Dired buffers.
See the new options `dired-hide-details-hide-symlink-targets' and
`dired-hide-details-hide-information-lines' for customizing what to hide.
631

Glenn Morris's avatar
Glenn Morris committed
632 633 634
** You can enable ElDoc inside the `eval-expression' minibuffer with:
  (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
The results display in the mode line.
635

636 637
** Electric Pair mode

Glenn Morris's avatar
Glenn Morris committed
638 639
*** New option `electric-pair-preserve-balance', enabled by default.
If non-nil, pairing/skipping only kicks in when that help the balance
640
of parentheses and quotes; i.e., the buffer should end up at least as
641 642
balanced as before.

Paul Eggert's avatar
Paul Eggert committed
643
You can further control this behavior by adjusting the predicates
Glenn Morris's avatar
Glenn Morris committed
644
stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
645

Glenn Morris's avatar
Glenn Morris committed
646
*** New option `electric-pair-delete-adjacent-pairs', enabled by default.
647 648 649 650
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.

Glenn Morris's avatar
Glenn Morris committed
651
*** New option `electric-pair-open-newline-between-pairs', enabled by default.
652 653 654 655
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.

Glenn Morris's avatar
Glenn Morris committed
656 657 658 659
*** New option `electric-pair-skip-whitespace', enabled by default.
This 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'.
660 661 662

*** New variables control the pairing in strings and comments.
You can customize `electric-pair-text-pairs' and
Paul Eggert's avatar
Paul Eggert committed
663
`electric-pair-text-syntax-table' to tweak pairing behavior inside
664 665
strings and comments.

666
** New EPA option `epa-mail-aliases'.
Glenn Morris's avatar
Glenn Morris committed
667 668
You can set this to a list of email address aliases that `epa-mail-encrypt'
should use to find keys.
669

670
** New ERC option `erc-accidental-paste-threshold-seconds'.
Glenn Morris's avatar
Glenn Morris committed
671
If set to a number, this can be used to avoid accidentally pasting large
Chong Yidong's avatar
Chong Yidong committed
672 673
amounts of data into the ERC input.

Glenn Morris's avatar
Glenn Morris committed
674
** New ERT macro `skip-unless' allows skipping ERT tests.
Chong Yidong's avatar
Chong Yidong committed
675 676 677

** Eshell

Glenn Morris's avatar
Glenn Morris committed
678
*** `eshell' now supports visual subcommands and options.
Chong Yidong's avatar
Chong Yidong committed
679 680 681 682 683 684 685
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
Glenn Morris's avatar
Glenn Morris committed
686
"git log" and "git <command> --help", which display their output in a
687
pager by default.  See `eshell-visual-subcommands' and `eshell-visual-options'.
Chong Yidong's avatar
Chong Yidong committed
688

Glenn Morris's avatar
Glenn Morris committed
689
*** New Eshell-Tramp module.
Chong Yidong's avatar
Chong Yidong committed
690
External su and sudo commands are now the default; the internal,
691
Tramp-using variants can still be used by enabling the eshell-tramp module.
Chong Yidong's avatar
Chong Yidong committed
692

693
** New F90 mode option `f90-smart-end-names'.
Chong Yidong's avatar
Chong Yidong committed
694

695 696 697 698 699 700 701 702 703 704 705 706 707
** 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.)

** Hi-Lock

*** New global command `M-s h .' (`highlight-symbol-at-point') highlights
the symbol near point.

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

Glenn Morris's avatar
Glenn Morris committed
708
** Icomplete is now more similar to Ido.
709

Glenn Morris's avatar
Glenn Morris committed
710 711 712 713
*** Icomplete by default now applies to all forms of minibuffer completion.
The variable `icomplete-with-completion-tables' (now a user option)
controls this.  To restore the old behavior, set it back to
'(internal-complete-buffer).
714

Glenn Morris's avatar
Glenn Morris committed
715 716
*** You can navigate through and select completions using the keys
from `icomplete-minibuffer-map'.
717

Glenn Morris's avatar
Glenn Morris committed
718 719
*** The string that separates potential completions is now a customizable
option (`icomplete-separator').  The default is " | " rather than ",".
720

Glenn Morris's avatar
Glenn Morris committed
721 722 723 724
*** New face `icomplete-first-match'; and new options
`icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.

*** The option `icomplete-show-key-bindings' has been removed.
Chong Yidong's avatar
Chong Yidong committed
725 726

** Ido
727

728
*** An Ido user manual is now included.
729

730 731 732
*** The option `ido-use-virtual-buffers' can now take the value `auto'.
This means to use virtual buffers if the current ido input does not match
an existing buffer.
733

734 735
*** The variable `ido-decorations' can optionally have two new elements,
which are the brackets to use around the sole remaining completion.
Chong Yidong's avatar
Chong Yidong committed
736 737 738 739 740 741 742 743 744 745 746 747

** Image mode

*** 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.
748 749 750 751
`a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
speed up and slow down the animation.  `a r' (`image-reverse-speed')
to reverse it and `a 0' (`image-reset-speed') to reset it.

Chong Yidong's avatar
Chong Yidong committed
752 753 754 755 756
*** 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.

Glenn Morris's avatar
Glenn Morris committed
757
** New Imenu option `imenu-generic-skip-comments-and-strings'.
Chong Yidong's avatar
Chong Yidong committed
758

Glenn Morris's avatar
Glenn Morris committed
759 760 761
** Info

*** New Info face `info-index-match', used to highlight matches in index
Chong Yidong's avatar
Chong Yidong committed
762 763 764
entries displayed by `Info-index-next', `Info-virtual-index' and
`info-apropos'.

Glenn Morris's avatar
Glenn Morris committed
765 766 767
*** The Info-edit command is obsolete.  Editing Info nodes by hand
has not been relevant for some time.

Chong Yidong's avatar
Chong Yidong committed
768 769
** JS Mode

Glenn Morris's avatar
Glenn Morris committed
770 771
*** New option `js-switch-indent-offset'.

Chong Yidong's avatar
Chong Yidong committed
772
*** Better indentation of multiple-variable declarations.
Glenn Morris's avatar
Glenn Morris committed
773
If a declaration spans several lines, variables on the following lines
Chong Yidong's avatar
Chong Yidong committed
774 775
are lined up to the first one.

Glenn Morris's avatar
Glenn Morris committed
776
*** Recognition and better indentation of continuations in array comprehensions.
Chong Yidong's avatar
Chong Yidong committed
777

Glenn Morris's avatar
Glenn Morris committed
778
** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
Chong Yidong's avatar
Chong Yidong committed
779 780

** Octave mode
Glenn Morris's avatar
Glenn Morris committed
781

Xue Fuqiao's avatar
Xue Fuqiao committed
782
*** Font locking for Texinfo comments and new keywords.
Glenn Morris's avatar
Glenn Morris committed
783 784 785

*** Completion in Octave file buffers.

Glenn Morris's avatar
Glenn Morris committed
786
*** ElDoc support.
Glenn Morris's avatar
Glenn Morris committed
787 788 789 790

*** Jump to definition.

*** Documentation lookup/search.
Chong Yidong's avatar
Chong Yidong committed
791

Glenn Morris's avatar
Glenn Morris committed
792
** OPascal mode is the new name for Delphi mode
Chong Yidong's avatar
Chong Yidong committed
793 794

*** All delphi-* variables and functions have been renamed to opascal-*.
Glenn Morris's avatar
Glenn Morris committed
795
Obsolete aliases exist for those likely to have been used externally.
Glenn Morris's avatar
Glenn Morris committed
796

Glenn Morris's avatar
Glenn Morris committed
797
*** The option `delphi-newline-always-indents' has been removed.
Chong Yidong's avatar
Chong Yidong committed
798
Use `electric-indent-mode' instead.
Glenn Morris's avatar
Glenn Morris committed
799

Glenn Morris's avatar
Glenn Morris committed
800
*** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
Chong Yidong's avatar
Chong Yidong committed
801 802 803

** Package

804 805 806 807 808 809 810 811 812 813 814
*** The package library now supports digital signing of packages.
Maintainers of package archives should consider signing their packages
to enhance security.

**** If the user option `package-check-signature' is non-nil,
Emacs tries to check package signatures at install time.
The value `allow-unsigned' allows installation of unsigned packages.

**** The user option `package-unsigned-archives' lists archives where
Emacs will not try to check signatures.

815
*** New option `package-pinned-packages'.  This is useful if you have multiple
816
archives enabled, with more than one offering a given package that you want.
817

Glenn Morris's avatar
Glenn Morris committed
818 819 820
*** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
to filter the list of packages by a keyword.

Paul Eggert's avatar
Paul Eggert committed
821
*** In the `describe-package' buffer, there are now buttons listing the
Glenn Morris's avatar
Glenn Morris committed
822 823 824
keywords related to the package.  Click on a button to see other packages
related to that keyword.

Chong Yidong's avatar
Chong Yidong committed
825 826 827
*** 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.
Glenn Morris's avatar
Glenn Morris committed
828 829
(For example, `describe-package' uses the `:url' extra property to
display a "Homepage" header.)
830

Glenn Morris's avatar
Glenn Morris committed
831 832
** In Prolog mode, `prolog-use-smie' has been removed,
along with the non-SMIE indentation code.
Xue Fuqiao's avatar
Xue Fuqiao committed
833

Chong Yidong's avatar
Chong Yidong committed
834
** Remember
835

Glenn Morris's avatar
Glenn Morris committed
836 837
*** The new command `remember-notes' creates a buffer that is saved on exit.
You can use it as a more permanent *scratch* buffer.
838

Glenn Morris's avatar
Glenn Morris committed
839 840 841 842
*** Remember can now store notes in separate files.
To use this, add `remember-store-in-files' to the `remember-handler-functions'
option.  The files are saved in `remember-data-directory' using
names specified by `remember-directory-file-name-format'.
843

Chong Yidong's avatar
Chong Yidong committed
844 845 846 847
** Rmail

*** Customize `rmail-mbox-format' to influence some minor aspects of
how Rmail displays non-MIME messages.
848

Chong Yidong's avatar
Chong Yidong committed
849 850
*** The `unrmail' command now converts from BABYL to mboxrd format,
rather than mboxo.  Customize `unrmail-mbox-format' to change this.
851

Chong Yidong's avatar
Chong Yidong committed
852
** Ruby mode
853

Glenn Morris's avatar
Glenn Morris committed
854
*** Improved syntax highlighting and indentation.
855

Glenn Morris's avatar
Glenn Morris committed
856
*** New `electric-indent-mode' integration.
857

Glenn Morris's avatar
Glenn Morris committed
858
*** New option `ruby-encoding-magic-comment-style'.
Chong Yidong's avatar
Chong Yidong committed
859

Glenn Morris's avatar
Glenn Morris committed
860
*** New option `ruby-custom-encoding-magic-comment-template'.
Chong Yidong's avatar
Chong Yidong committed
861 862

*** New option `ruby-align-to-stmt-keywords'.
863

864 865
*** New option `ruby-align-chained-calls'.

Glenn Morris's avatar
Glenn Morris committed
866
*** More Ruby file types have been added to `auto-mode-alist'.
867

868
** Search and Replace
869

870 871 872 873
*** 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.

874 875 876
*** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
and adds it to the search string.

Glenn Morris's avatar
Glenn Morris committed
877
*** `M-s i' in Isearch mode toggles whether search matches invisible text.
878

879 880 881
*** `query-replace' skips invisible text when `search-invisible' is nil,
and opens overlays with hidden text when `search-invisible' is `open'.