NEWS 161 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
** The configure option '--enable-silent-rules' and the command
'make V=0' now do a better job of suppressing chatter.

46 47 48 49 50 51

* Startup Changes in Emacs 24.5


* Changes in Emacs 24.5

52 53 54
** `insert-register' now leaves point after the inserted text
when called interactively.  A prefix argument toggles this behavior.

55 56
** New var `truncate-string-ellipsis' to choose how to indicate truncation.

57 58 59
---
** The default value of `history-length' has increased to 100.

60 61 62 63 64
+++
** 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.

65 66 67 68 69
---
** 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.

70 71 72 73 74
+++
** A password is now hidden also when typed in batch mode.  Another
hiding character but the default `.' can be used by let-binding the
variable `read-hide-char'.

75 76
** The new functions `string-collate-lessp' and `string-collate-equalp'
preserve the collation order as defined by the system's locale(1)
77 78 79
environment.  For the time being this is implemented for modern POSIX
systems and for MS-Windows, for other systems they fall back to their
counterparts `string-lessp' and `string-equal'.
80

81 82 83 84
*** The ls-lisp package uses `string-collate-lessp' to sort file names.
If you want the old, locale-independent sorting, customize the new
option `ls-lisp-use-string-collate' to a nil value.

85 86 87 88 89 90 91
*** The MS-Windows specific variable `w32-collate-ignore-punctuation',
if set to a non-nil value, causes the above 2 functions to ignore
symbol and punctuation characters when collating strings.  This
emulates the behavior of modern Posix platforms when the locale's
codeset is "UTF-8" (as in "en_US.UTF-8").  This is needed because
MS-Windows doesn't support UTF-8 as codeset in its locales.

92 93 94

* Editing Changes in Emacs 24.5

Glenn Morris's avatar
Glenn Morris committed
95
** Emacs now supports "bracketed paste mode" when running on a terminal
96
that supports it.  This facility allows Emacs to understand pasted
Glenn Morris's avatar
Glenn Morris committed
97 98 99
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
100 101
performance improvements when pasting large amounts of text.

102 103

* Changes in Specialized Modes and Packages in Emacs 24.5
104

105 106
** pcase
*** New UPatterns `quote' and `app'.
107
*** New UPatterns can be defined with `pcase-defmacro'.
108

109 110 111
** Lisp mode
*** Strings after `:documentation' are highlighted as docstrings.

112 113 114 115
** 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.
116

Leo Liu's avatar
Leo Liu committed
117 118 119
+++
** Macro `pcase' now supports vector qpattern.

Glenn Morris's avatar
Glenn Morris committed
120 121
** 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.
122

123 124 125
** Macro `minibuffer-with-setup-hook' takes (:append FUN) to mean
appending FUN to `minibuffer-setup-hook'.

126 127 128 129 130
** 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
131
`diary-chinese-insert-monthly-entry', `diary-chinese-insert-yearly-entry'.
132 133

+++
Glenn Morris's avatar
Glenn Morris committed
134 135 136
*** Calendar can list and mark diary entries with Chinese dates.
See `diary-chinese-list-entries' and `diary-chinese-mark-entries'.

137 138 139
*** The mode line of the calendar buffer will not be modified if
`calendar-mode-line-format' is nil.

140 141
** New ERT function `ert-summarize-tests-batch-and-exit'.

Glenn Morris's avatar
Glenn Morris committed
142 143 144 145
---
** The Rmail commands d, C-d and u now handle repeat counts to delete or
undelete multiple messages.

146 147 148 149 150 151
** Rmail can now render HTML mail messages if your Emacs was built with
libxml2 or if you have the Lynx browser installed.  By default, Rmail
will display the HTML version of a mail message that has both HTML and
plain text parts, if display of HTML email is possible; customize the
`rmail-mime-prefer-html' option to `nil' if you don't want that.

Glenn Morris's avatar
Glenn Morris committed
152
** SES now supports local printer functions; see `ses-define-local-printer'.
153

Glenn Morris's avatar
Glenn Morris committed
154 155 156
** 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).

157 158 159 160
** 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.

161 162 163 164
** Tramp

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

165 166 167 168 169 170 171 172 173
** SQL mode

*** New user variable `sql-default-directory' enables remote
connections using Tramp.

*** New command `sql-send-line-and-next' sends the current line to the
interactive buffer and advances to the next line, skipping whitespace
and comments.

Sam Steingold's avatar
Sam Steingold committed
174 175
*** Add support for Vertica SQL.

176 177 178 179 180 181
** VC and related modes

*** New option `vc-annotate-background-mode' controls whether
the color range from `vc-annotate-color-map' is applied to the
background or to the foreground.

182 183 184 185
** Calculator: decimal display mode uses "," groups, so it's more
fitting for use in money calculations; factorial works with
non-integer inputs.

186 187 188 189 190 191 192 193 194 195
** HideIfDef mode now support full C/C++ expressions, argumented macro expansions
, interactive macro evaluation and automatic scanning of #defined symbols.

*** New custom variable `hide-ifdef-header-regexp' to define C/C++ header file
name patterns. Default case-insensitive .h, .hh, .hpp and .hxx.
*** New custom variable `hide-ifdef-expand-reinclusion-protection' to prevent
reinclusion protected header files from being fully hidden.
*** New custom variable `hide-ifdef-exclude-define-regexp' to define symbol
name patterns (e.x. all "FOR_DOXYGEN_ONLY_*") to be excluded.

196 197 198 199 200
** TeX mode

*** New custom variable `tex-print-file-extension' to help users who
use PDF instead of DVI.

Glenn Morris's avatar
Glenn Morris committed
201 202 203 204 205
** Obsolete packages

---
*** gulp.el

206 207 208 209 210
---
*** 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
211 212 213
---
*** vi.el, vip.el (try M-x viper instead)

214 215 216 217 218 219

* New Modes and Packages in Emacs 24.5


* Incompatible Lisp Changes in Emacs 24.5

Glenn Morris's avatar
Glenn Morris committed
220
** window-configurations no longer record the buffers's marks.
221

Glenn Morris's avatar
Glenn Morris committed
222
** inhibit-modification-hooks now also inhibits lock-file checks, as well as
223 224
active region handling.

225 226
** deactivate-mark is now buffer-local.

Glenn Morris's avatar
Glenn Morris committed
227
** `cl-the' now asserts that its argument is of the given type.
228

229 230 231 232 233
+++
** 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.

234 235 236
** Menu items in keymaps do not support the "key shortcut cache" any more.
These slots used to hold key-shortcut data, but have been obsolete since
Emacs-21.
237

238 239 240

* Lisp Changes in Emacs 24.5

241
*** call-process-shell-command and process-file-shell-command
242
don't take "&rest args" any more.
243

244 245 246 247
** New function `funcall-interactively', which works like `funcall'
but makes `called-interactively-p' treat the function as (you guessed it)
called interactively.

248 249
** New function `function-put' to use instead of `put' for function properties.

250
+++
251
** New properties that can be specified with `declare':
Glenn Morris's avatar
Glenn Morris committed
252
*** (interactive-only INSTEAD), says to use INSTEAD for non-interactive use.
253 254 255
*** (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.
256

257 258 259 260
+++
** New macro `with-file-modes', for evaluating expressions with default file
permissions set to temporary values (e.g., for creating private files).

261
** You can access the slots of structures using `cl-struct-slot-value'.
Daniel Colascione's avatar
Daniel Colascione committed
262

263 264 265
** Functions `rmail-delete-forward' and `rmail-delete-backward' take an
optional repeat-count argument.

266 267
** Function `sort' can deal with vectors.

268
---
269 270 271 272 273
** New utilities in subr-x.el:
*** New macros `if-let' and `when-let' allow defining bindings and to
    execute code depending whether all values are true.
*** New macros `thread-first' and `thread-last' allow threading a form
    as the first or last argument of subsequent forms.
274

275 276 277 278 279

* Changes in Frames and Windows Code in Emacs 24.5

** Emacs can now draw horizontal scroll bars on some platforms that
provide toolkit scroll bars, namely Gtk, Lucid, Motif and Windows.
Martin Rudalics's avatar
Martin Rudalics committed
280
Horizontal scroll bars are turned off by default.
281 282
*** New function `horizontal-scroll-bars-available-p' telling whether
    horizontal scroll bars are available on the underlying system.
Martin Rudalics's avatar
Martin Rudalics committed
283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308
*** New mode `horizontal-scroll-bar-mode' to toggle horizontal scroll
    bars on all existing and future frames.
*** New frame parameters `horizontal-scroll-bars' and
    `scroll-bar-height' to set horizontal scroll bars and their height
    for individual frames and in `default-frame-alist'.
*** New function `frame-scroll-bar-height' to return the height of
    horizontal scroll bars on a specific frame.
*** `set-window-scroll-bars' now accepts five parameters where the last
    two specify height and type of the window's horizontal scroll bar.

** The height of a frame's menu and tool bar are no more counted in the
frame's text height.  This means that the text height stands only for
the height of the frame's root window plus that of the echo area (if
present).  This was already the behavior for frames with external tool
and menu bars (like in the Gtk builds) but has now been extended to all
builds.

** Frames now do not necessarily preserve the number of columns or lines
they display when setting default font, menu bar, fringe width, or
scroll bars.  In particular, maximized and fullscreen frames are
conceptually never resized if such settings change.  For fullheight and
fullwidth frames, the behavior may depend on the toolkit used.
*** New option `frame-inhibit-implied-resize' if non-nil, means that
   setting default font, menu bar, fringe width, or scroll bars of a
   specific frame does not resize that frame in order to preserve the
   number of columns or lines it displays.
309 310 311

* Changes in Emacs 24.5 on Non-Free Operating Systems

Glenn Morris's avatar
Glenn Morris committed
312 313 314 315 316
---
** 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.

317 318

* Installation Changes in Emacs 24.4
319

320
** Emacs can now be compiled with ACL (access control list) support.
321 322
This happens by default if a suitable support library is found at
build time, like libacl on GNU/Linux.  To prevent this, use the
323
configure option `--disable-acl'.  See below for the features this provides.
324

Chong Yidong's avatar
Chong Yidong committed
325
** Emacs can now be compiled with file notification support.
326 327
This happens by default if a suitable system library is found at
build time.  To prevent this, use the configure option
328
`--without-file-notification'.  See below for file-notify features.
Glenn Morris's avatar
Glenn Morris committed
329 330 331 332 333 334
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.
335

Chong Yidong's avatar
Chong Yidong committed
336 337
** The configure option `--without-compress-info' has been generalized,
and renamed to `--without-compress-install'.  It now prevents compression
338 339
of _any_ files during installation.

Chong Yidong's avatar
Chong Yidong committed
340
** The configure option `--with-crt-dir' has been removed.
341
It is no longer needed, as the crt*.o files are no longer linked specially.
342

343 344 345
** Directories passed to configure option `--enable-locallisppath' are
no longer created during installation.

346
** Emacs for Nextstep (Mac OS X, GNUstep) can be built with ImageMagick support.
Glenn Morris's avatar
Glenn Morris committed
347
This requires pkg-config to be available at build time.
348

Glenn Morris's avatar
Glenn Morris committed
349

350
* Startup Changes in Emacs 24.4
Glenn Morris's avatar
Glenn Morris committed
351

352 353 354 355 356 357 358 359 360
** 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.)

361
** The -L option, which normally prepends its argument to load-path,
362 363
will instead append, if the argument begins with `:' (or `;' on MS Windows;
i.e., `path-separator').
364

365 366 367 368 369
** 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
370 371 372
** The user option `initial-buffer-choice' can now specify a function
to set up the initial buffer.

Glenn Morris's avatar
Glenn Morris committed
373

374
* Changes in Emacs 24.4
375

376 377 378 379 380
** 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
381

382
*** Emacs preserves the ACL entries of files when backing up.
383

384 385 386
*** 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
387 388
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
389 390
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
391 392 393 394

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'.

395
If you want the previous behavior, where F10 invoked `tmm-menubar',
Eli Zaretskii's avatar
Eli Zaretskii committed
396
customize the option `tty-menu-open-use-tmm' to a non-nil value.
Glenn Morris's avatar
Glenn Morris committed
397 398
(Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
is nil.)
Eli Zaretskii's avatar
Eli Zaretskii committed
399

400 401 402 403 404
** 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.
405

406
** Multi-monitor support
407 408 409 410 411

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

412 413 414
*** 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
415
as if they were on X.  To get information for each physical
416 417 418 419
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'.

420 421 422 423 424 425 426 427 428
** 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
429
You can change the default by customizing `blink-cursor-blinks'.
430

Chong Yidong's avatar
Chong Yidong committed
431 432 433
** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
This affects View mode, etc.

Glenn Morris's avatar
Glenn Morris committed
434
** The default value of `make-backup-file-name-function' is no longer nil.
Glenn Morris's avatar
Glenn Morris committed
435 436
Instead it defaults to a function that does what the nil value used to.

437
** Help
Glenn Morris's avatar
Glenn Morris committed
438

Chong Yidong's avatar
Chong Yidong committed
439
*** The command `apropos-variable' is renamed to `apropos-user-option'.
440
`apropos-user-option' shows all user options, while `apropos-variable'
Chong Yidong's avatar
Chong Yidong committed
441 442 443
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.
444

Chong Yidong's avatar
Chong Yidong committed
445
*** The key `?' now describes prefix bindings, like `C-h'.
446

Glenn Morris's avatar
Glenn Morris committed
447
*** The command `describe-function' has been extended for EIEIO.
448
Running it on constructors will show a full description of the
David Engster's avatar
David Engster committed
449
generated class.  For generic functions, it will show all
450 451 452 453
implementations together with links to the source.  The old commands
`describe-class', `describe-constructor' and `describe-generic' were
removed.

454
*** The function `quail-help' is no longer an interactive command.
Glenn Morris's avatar
Glenn Morris committed
455
Use `C-h C-\' (`describe-input-method') instead.
456

Glenn Morris's avatar
Glenn Morris committed
457
** Frame and window handling
458

Chong Yidong's avatar
Chong Yidong committed
459 460
*** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
bound to <f11> and M-<f10>, respectively.
461

Chong Yidong's avatar
Chong Yidong committed
462 463 464
*** New hooks `focus-in-hook', `focus-out-hook'.
These are normal hooks run when an Emacs frame gains or loses input focus.

465 466 467 468
*** 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
469 470 471 472 473 474 475 476 477 478 479 480 481 482 483
*** 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.
484

485 486 487 488
*** The functions `window-body-height' and `window-body-width' now never
count partially visible lines or columns if called with a nil PIXELWISE
argument.

489 490 491 492 493 494 495 496 497 498
*** 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.

499 500 501
*** 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
502 503 504 505 506 507 508
`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.

509
*** `fit-window-to-buffer' can now resize windows in both dimensions.
510
This behavior is controlled by the new option
511
`fit-window-to-buffer-horizontally'.  The new option
512
`fit-frame-to-buffer' allows you to fit the window's frame to its buffer.
513

514 515
*** `fit-frame-to-buffer' now fits frames in both dimensions.  The new
options `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes'
516 517
control the size of the frame and its position on screen.

518 519 520 521 522 523
*** 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.
524

Chong Yidong's avatar
Chong Yidong committed
525 526 527 528
*** `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.
529

530 531 532
*** The functions `window-size' and `window-total-size' now have an
optional argument to return a rounded size value.

533
*** `window-state-put' now allows you to put a window state into internal
534 535
windows too.

Chong Yidong's avatar
Chong Yidong committed
536
*** New option `scroll-bar-adjust-thumb-portion'.
537 538
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
539 540
of the buffer is visible).

541
*** New display actions functions for `display-buffer':
542

543 544
**** `display-buffer-at-bottom' chooses or creates a window at the
bottom of the selected frame.
545

546
**** `display-buffer-no-window' to not display the buffer in a window.
Xue Fuqiao's avatar
Xue Fuqiao committed
547 548

*** New display action alist entry `allow-no-window' to indicate the
549 550
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
551

Glenn Morris's avatar
Glenn Morris committed
552 553 554
*** `display-buffer-in-previous-window' is now a member of
`display-buffer-fallback-action'.

Glenn Morris's avatar
Glenn Morris committed
555
** Lisp evaluation
556

Chong Yidong's avatar
Chong Yidong committed
557 558 559
*** `eval-defun' on an already defined defcustom calls the :set function,
if there is one.

Glenn Morris's avatar
Glenn Morris committed
560
*** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
561 562 563
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
564
`(eval-expression-)print-level' to nil.  Additionally, it causes integers
565
to be printed in other formats (octal, hexadecimal, and character).
Chong Yidong's avatar
Chong Yidong committed
566

567 568 569
*** New hook `eval-expression-minibuffer-setup-hook' run by
`eval-expression' on entering the minibuffer.

570
** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
Chong Yidong's avatar
Chong Yidong committed
571
because it affects caching of paragraph scanning results as well.
572
There is no reason to set this to nil except for debugging purposes.
573

574 575
** `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
576

Glenn Morris's avatar
Glenn Morris committed
577
** The default value of `comment-use-global-state' is now t,
Chong Yidong's avatar
Chong Yidong committed
578 579
and this variable has been marked obsolete.

580
** `write-region-inhibit-fsync' now defaults to t in batch mode.
Glenn Morris's avatar
Glenn Morris committed
581

582 583 584
** 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
585

Chong Yidong's avatar
Chong Yidong committed
586 587 588

* Editing Changes in Emacs 24.4

Glenn Morris's avatar
Glenn Morris committed
589
** Indentation
Chong Yidong's avatar
Chong Yidong committed
590

591
*** `electric-indent-mode' is now enabled by default.
592 593 594
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 `{').
595

Glenn Morris's avatar
Glenn Morris committed
596 597
*** New buffer-local `electric-indent-local-mode'.

Chong Yidong's avatar
Chong Yidong committed
598 599 600 601 602
*** 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.
603

Chong Yidong's avatar
Chong Yidong committed
604
*** `tab-stop-list' is now implicitly extended to infinity by repeating
Glenn Morris's avatar
Glenn Morris committed
605
the last step.  Its default value is changed to nil, which means a tab
Xue Fuqiao's avatar
Xue Fuqiao committed
606
stop every `tab-width' columns.
607

Glenn Morris's avatar
Glenn Morris committed
608
** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
Glenn Morris's avatar
Glenn Morris committed
609 610 611 612
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
613 614 615

** 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.
616

617 618 619 620 621 622
** 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.

623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639
** 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
640

641 642 643
*** 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.
644 645
Interactive commands that read registers and want to make use of this
should use `register-read-with-preview' to read register names.
646

Glenn Morris's avatar
Glenn Morris committed
647 648 649 650 651 652
*** 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.)

653 654
*** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
macros in registers.
655

656

657
* Changes in Specialized Modes and Packages in Emacs 24.4
658

Chong Yidong's avatar
Chong Yidong committed
659
** Backtrace and debugger
660

Glenn Morris's avatar
Glenn Morris committed
661
*** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
662
display of local variables of the current stack frame.
Glenn Morris's avatar
Glenn Morris committed
663 664 665 666

*** 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).
667

Glenn Morris's avatar
Glenn Morris committed
668
*** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
669

670
** Battery information can now be retrieved from BSD's `apm' utility.
671

672
** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
673

674 675 676 677 678 679 680 681
** 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
682 683
*** The new option `calc-gregorian-switch' lets you configure if
(and when) Calc switches from the Julian to the Gregorian calendar.
684

685 686
*** Support for ISO 8601 dates.

687 688 689 690 691 692 693 694 695 696 697 698
** 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
699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715
** 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++.
716
They are also displayed by the summarize feature in the mode line.
Chong Yidong's avatar
Chong Yidong committed
717 718 719 720

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

721 722
**** 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
723 724 725

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

726 727 728 729 730 731 732 733
** 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
734 735
** cl-lib

736
*** New macro `cl-tagbody'.
737
This executes statements while allowing for control transfer to labels.
Chong Yidong's avatar
Chong Yidong committed
738 739 740 741 742

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

** CUA mode

Chong Yidong's avatar
Chong Yidong committed
743
*** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
Glenn Morris's avatar
Glenn Morris committed
744 745
Hence, you can now enable it independently from those modes, and from
`transient-mark-mode'.
Chong Yidong's avatar
Chong Yidong committed
746 747 748

*** `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
749

750 751
*** CUA's rectangles can now be used without CUA by calling the command
`cua-rectangle-mark-mode'.
Chong Yidong's avatar
Chong Yidong committed
752

753
** Delete Selection mode can now be used without Transient Mark mode.
Chong Yidong's avatar
Chong Yidong committed
754

755 756
** Desktop

Glenn Morris's avatar
Glenn Morris committed
757 758 759
*** `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).
760

761 762 763 764
*** 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'.
765

766
** New Dired minor mode `dired-hide-details-mode' toggles whether details,
767 768 769
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.
770

Glenn Morris's avatar
Glenn Morris committed
771 772 773
** 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.
774

775 776
** Electric Pair mode

Glenn Morris's avatar
Glenn Morris committed
777 778
*** New option `electric-pair-preserve-balance', enabled by default.
If non-nil, pairing/skipping only kicks in when that help the balance
779
of parentheses and quotes; i.e., the buffer should end up at least as
780 781
balanced as before.

Paul Eggert's avatar
Paul Eggert committed
782
You can further control this behavior by adjusting the predicates
Glenn Morris's avatar
Glenn Morris committed
783
stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
784

Glenn Morris's avatar
Glenn Morris committed
785
*** New option `electric-pair-delete-adjacent-pairs', enabled by default.
786 787 788 789
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
790
*** New option `electric-pair-open-newline-between-pairs', enabled by default.
791 792 793 794
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
795 796 797 798
*** 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'.
799 800 801

*** New variables control the pairing in strings and comments.
You can customize `electric-pair-text-pairs' and
Paul Eggert's avatar
Paul Eggert committed
802
`electric-pair-text-syntax-table' to tweak pairing behavior inside
803 804
strings and comments.

805
** New EPA option `epa-mail-aliases'.
Glenn Morris's avatar
Glenn Morris committed
806 807
You can set this to a list of email address aliases that `epa-mail-encrypt'
should use to find keys.
808

809
** New ERC option `erc-accidental-paste-threshold-seconds'.
Glenn Morris's avatar
Glenn Morris committed
810
If set to a number, this can be used to avoid accidentally pasting large
Chong Yidong's avatar
Chong Yidong committed
811 812
amounts of data into the ERC input.

Glenn Morris's avatar
Glenn Morris committed
813
** New ERT macro `skip-unless' allows skipping ERT tests.
Chong Yidong's avatar
Chong Yidong committed
814 815 816

** Eshell

Glenn Morris's avatar
Glenn Morris committed
817
*** `eshell' now supports visual subcommands and options.
Chong Yidong's avatar
Chong Yidong committed
818 819 820 821 822 823 824
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
825
"git log" and "git <command> --help", which display their output in a
826
pager by default.  See `eshell-visual-subcommands' and `eshell-visual-options'.
Chong Yidong's avatar
Chong Yidong committed
827

Glenn Morris's avatar
Glenn Morris committed
828
*** New Eshell-Tramp module.
Chong Yidong's avatar
Chong Yidong committed
829
External su and sudo commands are now the default; the internal,
830
Tramp-using variants can still be used by enabling the eshell-tramp module.
Chong Yidong's avatar
Chong Yidong committed
831

832
** New F90 mode option `f90-smart-end-names'.
Chong Yidong's avatar
Chong Yidong committed
833

834 835 836 837 838 839 840 841 842 843 844 845 846
** 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
847
** Icomplete is now more similar to Ido.
848

Glenn Morris's avatar
Glenn Morris committed
849 850 851 852
*** 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).
853

Glenn Morris's avatar
Glenn Morris committed
854 855
*** You can navigate through and select completions using the keys
from `icomplete-minibuffer-map'.
856

Glenn Morris's avatar
Glenn Morris committed
857 858
*** The string that separates potential completions is now a customizable
option (`icomplete-separator').  The default is " | " rather than ",".
859

Glenn Morris's avatar
Glenn Morris committed
860 861 862 863
*** 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
864 865

** Ido
866

867
*** An Ido user manual is now included.
868

869 870 871
*** 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.
872

873 874
*** 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
875 876 877 878 879 880 881 882 883 884 885 886

** 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.
887 888 889 890
`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
891 892 893 894 895
*** 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
896
** New Imenu option `imenu-generic-skip-comments-and-strings'.
Chong Yidong's avatar
Chong Yidong committed
897

Glenn Morris's avatar
Glenn Morris committed
898 899 900
** Info

*** New Info face `info-index-match', used to highlight matches in index
Chong Yidong's avatar
Chong Yidong committed
901 902 903
entries displayed by `Info-index-next', `Info-virtual-index' and
`info-apropos'.

Glenn Morris's avatar
Glenn Morris committed
904 905 906
*** 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
907 908
** JS Mode

Glenn Morris's avatar
Glenn Morris committed
909 910
*** New option `js-switch-indent-offset'.

Chong Yidong's avatar
Chong Yidong committed
911
*** Better indentation of multiple-variable declarations.
Glenn Morris's avatar
Glenn Morris committed
912
If a declaration spans several lines, variables on the following lines
Chong Yidong's avatar
Chong Yidong committed
913 914
are lined up to the first one.

Glenn Morris's avatar
Glenn Morris committed
915
*** Recognition and better indentation of continuations in array comprehensions.
Chong Yidong's avatar
Chong Yidong committed
916

Glenn Morris's avatar
Glenn Morris committed
917
** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
Chong Yidong's avatar
Chong Yidong committed
918 919

** Octave mode
Glenn Morris's avatar
Glenn Morris committed
920

Xue Fuqiao's avatar
Xue Fuqiao committed
921
*** Font locking for Texinfo comments and new keywords.