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

Stefan Monnier's avatar
Stefan Monnier committed
25
* Installation Changes in Emacs 25.1
26

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

Stefan Monnier's avatar
Stefan Monnier committed
47
* Startup Changes in Emacs 25.1
48 49


Stefan Monnier's avatar
Stefan Monnier committed
50
* Changes in Emacs 25.1
51

Stefan Monnier's avatar
Stefan Monnier committed
52 53 54
** x-select-enable-clipboard is renamed gui-select-enable-clipboard.
Additionally it now also applies to OSX and GNUstep.

55 56 57
** `insert-register' now leaves point after the inserted text
when called interactively.  A prefix argument toggles this behavior.

58 59
** New var `truncate-string-ellipsis' to choose how to indicate truncation.

60 61 62
---
** The default value of `history-length' has increased to 100.

63 64 65 66 67
+++
** 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.

68 69 70 71 72
---
** 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.

73 74 75 76 77
+++
** 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'.

78 79
** The new functions `string-collate-lessp' and `string-collate-equalp'
preserve the collation order as defined by the system's locale(1)
80 81 82
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'.
83

84 85 86 87
*** 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.

88 89 90 91 92 93 94
*** 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.

95

Stefan Monnier's avatar
Stefan Monnier committed
96
* Editing Changes in Emacs 25.1
97

Glenn Morris's avatar
Glenn Morris committed
98
** Emacs now supports "bracketed paste mode" when running on a terminal
99
that supports it.  This facility allows Emacs to understand pasted
Glenn Morris's avatar
Glenn Morris committed
100 101 102
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
103 104
performance improvements when pasting large amounts of text.

105

Stefan Monnier's avatar
Stefan Monnier committed
106
* Changes in Specialized Modes and Packages in Emacs 25.1
107

108 109 110 111
** ElDoc
*** New minor mode global-eldoc-mode
*** eldoc-documentation-function now defaults to nil

112 113
** pcase
*** New UPatterns `quote' and `app'.
114
*** New UPatterns can be defined with `pcase-defmacro'.
115

116 117 118
** Lisp mode
*** Strings after `:documentation' are highlighted as docstrings.

119 120 121 122
** 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.
123

Leo Liu's avatar
Leo Liu committed
124 125 126
+++
** Macro `pcase' now supports vector qpattern.

Glenn Morris's avatar
Glenn Morris committed
127 128
** 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.
129

130 131 132
** Macro `minibuffer-with-setup-hook' takes (:append FUN) to mean
appending FUN to `minibuffer-setup-hook'.

133 134 135 136 137
** 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
138
`diary-chinese-insert-monthly-entry', `diary-chinese-insert-yearly-entry'.
139 140

+++
Glenn Morris's avatar
Glenn Morris committed
141 142 143
*** Calendar can list and mark diary entries with Chinese dates.
See `diary-chinese-list-entries' and `diary-chinese-mark-entries'.

144 145 146
*** The mode line of the calendar buffer will not be modified if
`calendar-mode-line-format' is nil.

147 148
** New ERT function `ert-summarize-tests-batch-and-exit'.

Glenn Morris's avatar
Glenn Morris committed
149 150 151 152
---
** The Rmail commands d, C-d and u now handle repeat counts to delete or
undelete multiple messages.

153 154 155 156 157 158
** 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
159
** SES now supports local printer functions; see `ses-define-local-printer'.
160

Glenn Morris's avatar
Glenn Morris committed
161 162 163
** 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).

164 165 166 167
** 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.

168 169 170 171
** Tramp

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

172 173 174 175 176 177 178 179 180
** 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
181 182
*** Add support for Vertica SQL.

183 184 185 186 187 188
** 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.

189 190 191 192
** Calculator: decimal display mode uses "," groups, so it's more
fitting for use in money calculations; factorial works with
non-integer inputs.

193 194 195 196 197 198 199 200 201 202
** 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.

203 204 205 206 207
** 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
208 209 210 211 212
** Obsolete packages

---
*** gulp.el

213 214 215 216 217
---
*** 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
218 219 220
---
*** vi.el, vip.el (try M-x viper instead)

221

Stefan Monnier's avatar
Stefan Monnier committed
222
* New Modes and Packages in Emacs 25.1
223 224


Stefan Monnier's avatar
Stefan Monnier committed
225
* Incompatible Lisp Changes in Emacs 25.1
226

Glenn Morris's avatar
Glenn Morris committed
227
** window-configurations no longer record the buffers's marks.
228

Glenn Morris's avatar
Glenn Morris committed
229
** inhibit-modification-hooks now also inhibits lock-file checks, as well as
230 231
active region handling.

232 233
** deactivate-mark is now buffer-local.

Glenn Morris's avatar
Glenn Morris committed
234
** `cl-the' now asserts that its argument is of the given type.
235

236 237 238 239 240
+++
** 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.

241 242 243
** 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.
244

245

Stefan Monnier's avatar
Stefan Monnier committed
246
* Lisp Changes in Emacs 25.1
247

Stefan Monnier's avatar
Stefan Monnier committed
248 249 250
** x-select-text is renamed gui-select-text.

** call-process-shell-command and process-file-shell-command
251
don't take "&rest args" any more.
252

253 254
** New function `alist-get', which is also a valid place (aka lvalue).

255 256 257 258
** New function `funcall-interactively', which works like `funcall'
but makes `called-interactively-p' treat the function as (you guessed it)
called interactively.

259 260
** New function `function-put' to use instead of `put' for function properties.

261
+++
262
** New properties that can be specified with `declare':
Glenn Morris's avatar
Glenn Morris committed
263
*** (interactive-only INSTEAD), says to use INSTEAD for non-interactive use.
264 265 266
*** (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.
267

268 269 270 271
+++
** New macro `with-file-modes', for evaluating expressions with default file
permissions set to temporary values (e.g., for creating private files).

272
** You can access the slots of structures using `cl-struct-slot-value'.
Daniel Colascione's avatar
Daniel Colascione committed
273

274 275 276
** Functions `rmail-delete-forward' and `rmail-delete-backward' take an
optional repeat-count argument.

277 278
** Function `sort' can deal with vectors.

279
---
280 281 282 283 284
** 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.
285

286

Stefan Monnier's avatar
Stefan Monnier committed
287
* Changes in Frames and Windows Code in Emacs 25.1
288 289 290

** 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
291
Horizontal scroll bars are turned off by default.
292 293
*** 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
294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319
*** 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.
320

Stefan Monnier's avatar
Stefan Monnier committed
321
* Changes in Emacs 25.1 on Non-Free Operating Systems
322

Glenn Morris's avatar
Glenn Morris committed
323 324 325 326 327
---
** 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.

328 329

* Installation Changes in Emacs 24.4
330

331
** Emacs can now be compiled with ACL (access control list) support.
332 333
This happens by default if a suitable support library is found at
build time, like libacl on GNU/Linux.  To prevent this, use the
334
configure option `--disable-acl'.  See below for the features this provides.
335

Chong Yidong's avatar
Chong Yidong committed
336
** Emacs can now be compiled with file notification support.
337 338
This happens by default if a suitable system library is found at
build time.  To prevent this, use the configure option
339
`--without-file-notification'.  See below for file-notify features.
Glenn Morris's avatar
Glenn Morris committed
340 341 342 343 344 345
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.
346

Chong Yidong's avatar
Chong Yidong committed
347 348
** The configure option `--without-compress-info' has been generalized,
and renamed to `--without-compress-install'.  It now prevents compression
349 350
of _any_ files during installation.

Chong Yidong's avatar
Chong Yidong committed
351
** The configure option `--with-crt-dir' has been removed.
352
It is no longer needed, as the crt*.o files are no longer linked specially.
353

354 355 356
** Directories passed to configure option `--enable-locallisppath' are
no longer created during installation.

357
** Emacs for Nextstep (Mac OS X, GNUstep) can be built with ImageMagick support.
Glenn Morris's avatar
Glenn Morris committed
358
This requires pkg-config to be available at build time.
359

Glenn Morris's avatar
Glenn Morris committed
360

361
* Startup Changes in Emacs 24.4
Glenn Morris's avatar
Glenn Morris committed
362

363 364 365 366 367 368 369 370 371
** 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.)

372
** The -L option, which normally prepends its argument to load-path,
373 374
will instead append, if the argument begins with `:' (or `;' on MS Windows;
i.e., `path-separator').
375

376 377 378 379 380
** 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
381 382 383
** The user option `initial-buffer-choice' can now specify a function
to set up the initial buffer.

Glenn Morris's avatar
Glenn Morris committed
384

385
* Changes in Emacs 24.4
386

387 388 389 390 391
** 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
392

393
*** Emacs preserves the ACL entries of files when backing up.
394

395 396 397
*** 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
398 399
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
400 401
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
402 403 404 405

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'.

406
If you want the previous behavior, where F10 invoked `tmm-menubar',
Eli Zaretskii's avatar
Eli Zaretskii committed
407
customize the option `tty-menu-open-use-tmm' to a non-nil value.
Glenn Morris's avatar
Glenn Morris committed
408 409
(Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
is nil.)
Eli Zaretskii's avatar
Eli Zaretskii committed
410

411 412 413 414 415
** 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.
416

417
** Multi-monitor support
418 419 420 421 422

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

423 424 425
*** 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
426
as if they were on X.  To get information for each physical
427 428 429 430
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'.

431 432 433 434 435 436 437 438 439
** 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
440
You can change the default by customizing `blink-cursor-blinks'.
441

Chong Yidong's avatar
Chong Yidong committed
442 443 444
** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
This affects View mode, etc.

Glenn Morris's avatar
Glenn Morris committed
445
** The default value of `make-backup-file-name-function' is no longer nil.
Glenn Morris's avatar
Glenn Morris committed
446 447
Instead it defaults to a function that does what the nil value used to.

448
** Help
Glenn Morris's avatar
Glenn Morris committed
449

Chong Yidong's avatar
Chong Yidong committed
450
*** The command `apropos-variable' is renamed to `apropos-user-option'.
451
`apropos-user-option' shows all user options, while `apropos-variable'
Chong Yidong's avatar
Chong Yidong committed
452 453 454
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.
455

Chong Yidong's avatar
Chong Yidong committed
456
*** The key `?' now describes prefix bindings, like `C-h'.
457

Glenn Morris's avatar
Glenn Morris committed
458
*** The command `describe-function' has been extended for EIEIO.
459
Running it on constructors will show a full description of the
David Engster's avatar
David Engster committed
460
generated class.  For generic functions, it will show all
461 462 463 464
implementations together with links to the source.  The old commands
`describe-class', `describe-constructor' and `describe-generic' were
removed.

465
*** The function `quail-help' is no longer an interactive command.
Glenn Morris's avatar
Glenn Morris committed
466
Use `C-h C-\' (`describe-input-method') instead.
467

Glenn Morris's avatar
Glenn Morris committed
468
** Frame and window handling
469

Chong Yidong's avatar
Chong Yidong committed
470 471
*** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
bound to <f11> and M-<f10>, respectively.
472

Chong Yidong's avatar
Chong Yidong committed
473 474 475
*** New hooks `focus-in-hook', `focus-out-hook'.
These are normal hooks run when an Emacs frame gains or loses input focus.

476 477 478 479
*** 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
480 481 482 483 484 485 486 487 488 489 490 491 492 493 494
*** 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.
495

496 497 498 499
*** The functions `window-body-height' and `window-body-width' now never
count partially visible lines or columns if called with a nil PIXELWISE
argument.

500 501 502 503 504 505 506 507 508 509
*** 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.

510 511 512
*** 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
513 514 515 516 517 518 519
`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.

520
*** `fit-window-to-buffer' can now resize windows in both dimensions.
521
This behavior is controlled by the new option
522
`fit-window-to-buffer-horizontally'.  The new option
523
`fit-frame-to-buffer' allows you to fit the window's frame to its buffer.
524

525 526
*** `fit-frame-to-buffer' now fits frames in both dimensions.  The new
options `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes'
527 528
control the size of the frame and its position on screen.

529 530 531 532 533 534
*** 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.
535

Chong Yidong's avatar
Chong Yidong committed
536 537 538 539
*** `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.
540

541 542 543
*** The functions `window-size' and `window-total-size' now have an
optional argument to return a rounded size value.

544
*** `window-state-put' now allows you to put a window state into internal
545 546
windows too.

Chong Yidong's avatar
Chong Yidong committed
547
*** New option `scroll-bar-adjust-thumb-portion'.
548 549
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
550 551
of the buffer is visible).

552
*** New display actions functions for `display-buffer':
553

554 555
**** `display-buffer-at-bottom' chooses or creates a window at the
bottom of the selected frame.
556

557
**** `display-buffer-no-window' to not display the buffer in a window.
Xue Fuqiao's avatar
Xue Fuqiao committed
558 559

*** New display action alist entry `allow-no-window' to indicate the
560 561
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
562

Glenn Morris's avatar
Glenn Morris committed
563 564 565
*** `display-buffer-in-previous-window' is now a member of
`display-buffer-fallback-action'.

Glenn Morris's avatar
Glenn Morris committed
566
** Lisp evaluation
567

Chong Yidong's avatar
Chong Yidong committed
568 569 570
*** `eval-defun' on an already defined defcustom calls the :set function,
if there is one.

Glenn Morris's avatar
Glenn Morris committed
571
*** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
572 573 574
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
575
`(eval-expression-)print-level' to nil.  Additionally, it causes integers
576
to be printed in other formats (octal, hexadecimal, and character).
Chong Yidong's avatar
Chong Yidong committed
577

578 579 580
*** New hook `eval-expression-minibuffer-setup-hook' run by
`eval-expression' on entering the minibuffer.

581
** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
Chong Yidong's avatar
Chong Yidong committed
582
because it affects caching of paragraph scanning results as well.
583
There is no reason to set this to nil except for debugging purposes.
584

585 586
** `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
587

Glenn Morris's avatar
Glenn Morris committed
588
** The default value of `comment-use-global-state' is now t,
Chong Yidong's avatar
Chong Yidong committed
589 590
and this variable has been marked obsolete.

591
** `write-region-inhibit-fsync' now defaults to t in batch mode.
Glenn Morris's avatar
Glenn Morris committed
592

593 594 595
** 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
596

Chong Yidong's avatar
Chong Yidong committed
597 598 599

* Editing Changes in Emacs 24.4

Glenn Morris's avatar
Glenn Morris committed
600
** Indentation
Chong Yidong's avatar
Chong Yidong committed
601

602
*** `electric-indent-mode' is now enabled by default.
603 604 605
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 `{').
606

Glenn Morris's avatar
Glenn Morris committed
607 608
*** New buffer-local `electric-indent-local-mode'.

Chong Yidong's avatar
Chong Yidong committed
609 610 611 612 613
*** 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.
614

Chong Yidong's avatar
Chong Yidong committed
615
*** `tab-stop-list' is now implicitly extended to infinity by repeating
Glenn Morris's avatar
Glenn Morris committed
616
the last step.  Its default value is changed to nil, which means a tab
Xue Fuqiao's avatar
Xue Fuqiao committed
617
stop every `tab-width' columns.
618

Glenn Morris's avatar
Glenn Morris committed
619
** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
Glenn Morris's avatar
Glenn Morris committed
620 621 622 623
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
624 625 626

** 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.
627

628 629 630 631 632 633
** 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.

634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650
** 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
651

652 653 654
*** 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.
655 656
Interactive commands that read registers and want to make use of this
should use `register-read-with-preview' to read register names.
657

Glenn Morris's avatar
Glenn Morris committed
658 659 660 661 662 663
*** 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.)

664 665
*** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
macros in registers.
666

667

668
* Changes in Specialized Modes and Packages in Emacs 24.4
669

Chong Yidong's avatar
Chong Yidong committed
670
** Backtrace and debugger
671

Glenn Morris's avatar
Glenn Morris committed
672
*** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
673
display of local variables of the current stack frame.
Glenn Morris's avatar
Glenn Morris committed
674 675 676 677

*** 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).
678

Glenn Morris's avatar
Glenn Morris committed
679
*** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
680

681
** Battery information can now be retrieved from BSD's `apm' utility.
682

683
** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
684

685 686 687 688 689 690 691 692
** 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
693 694
*** The new option `calc-gregorian-switch' lets you configure if
(and when) Calc switches from the Julian to the Gregorian calendar.
695

696 697
*** Support for ISO 8601 dates.

698 699 700 701 702 703 704 705 706 707 708 709
** 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
710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726
** 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++.
727
They are also displayed by the summarize feature in the mode line.
Chong Yidong's avatar
Chong Yidong committed
728 729 730 731

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

732 733
**** 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
734 735 736

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

737 738 739 740 741 742 743 744
** 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
745 746
** cl-lib

747
*** New macro `cl-tagbody'.
748
This executes statements while allowing for control transfer to labels.
Chong Yidong's avatar
Chong Yidong committed
749 750 751 752 753

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

** CUA mode

Chong Yidong's avatar
Chong Yidong committed
754
*** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
Glenn Morris's avatar
Glenn Morris committed
755 756
Hence, you can now enable it independently from those modes, and from
`transient-mark-mode'.
Chong Yidong's avatar
Chong Yidong committed
757 758 759

*** `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
760

761 762
*** CUA's rectangles can now be used without CUA by calling the command
`cua-rectangle-mark-mode'.
Chong Yidong's avatar
Chong Yidong committed
763

764
** Delete Selection mode can now be used without Transient Mark mode.
Chong Yidong's avatar
Chong Yidong committed
765

766 767
** Desktop

Glenn Morris's avatar
Glenn Morris committed
768 769 770
*** `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).
771

772 773 774 775
*** 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'.
776

777
** New Dired minor mode `dired-hide-details-mode' toggles whether details,
778 779 780
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.
781

Glenn Morris's avatar
Glenn Morris committed
782 783 784
** 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.
785

786 787
** Electric Pair mode

Glenn Morris's avatar
Glenn Morris committed
788 789
*** New option `electric-pair-preserve-balance', enabled by default.
If non-nil, pairing/skipping only kicks in when that help the balance
790
of parentheses and quotes; i.e., the buffer should end up at least as
791 792
balanced as before.

Paul Eggert's avatar
Paul Eggert committed
793
You can further control this behavior by adjusting the predicates
Glenn Morris's avatar
Glenn Morris committed
794
stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
795

Glenn Morris's avatar
Glenn Morris committed
796
*** New option `electric-pair-delete-adjacent-pairs', enabled by default.
797 798 799 800
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
801
*** New option `electric-pair-open-newline-between-pairs', enabled by default.
802 803 804 805
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
806 807 808 809
*** 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'.
810 811 812

*** New variables control the pairing in strings and comments.
You can customize `electric-pair-text-pairs' and
Paul Eggert's avatar
Paul Eggert committed
813
`electric-pair-text-syntax-table' to tweak pairing behavior inside
814 815
strings and comments.

816
** New EPA option `epa-mail-aliases'.
Glenn Morris's avatar
Glenn Morris committed
817 818
You can set this to a list of email address aliases that `epa-mail-encrypt'
should use to find keys.
819

820
** New ERC option `erc-accidental-paste-threshold-seconds'.
Glenn Morris's avatar
Glenn Morris committed
821
If set to a number, this can be used to avoid accidentally pasting large
Chong Yidong's avatar
Chong Yidong committed
822 823
amounts of data into the ERC input.

Glenn Morris's avatar
Glenn Morris committed
824
** New ERT macro `skip-unless' allows skipping ERT tests.
Chong Yidong's avatar
Chong Yidong committed
825 826 827

** Eshell

Glenn Morris's avatar
Glenn Morris committed
828
*** `eshell' now supports visual subcommands and options.
Chong Yidong's avatar
Chong Yidong committed
829 830 831 832 833 834 835
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
836
"git log" and "git <command> --help", which display their output in a
837
pager by default.  See `eshell-visual-subcommands' and `eshell-visual-options'.
Chong Yidong's avatar
Chong Yidong committed
838

Glenn Morris's avatar
Glenn Morris committed
839
*** New Eshell-Tramp module.
Chong Yidong's avatar
Chong Yidong committed
840
External su and sudo commands are now the default; the internal,
841
Tramp-using variants can still be used by enabling the eshell-tramp module.
Chong Yidong's avatar
Chong Yidong committed
842

843
** New F90 mode option `f90-smart-end-names'.
Chong Yidong's avatar
Chong Yidong committed
844

845 846 847 848 849 850 851 852 853 854 855 856 857
** 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
858
** Icomplete is now more similar to Ido.
859

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

Glenn Morris's avatar
Glenn Morris committed
865 866
*** You can navigate through and select completions using the keys
from `icomplete-minibuffer-map'.
867

Glenn Morris's avatar
Glenn Morris committed
868 869
*** The string that separates potential completions is now a customizable
option (`icomplete-separator').  The default is " | " rather than ",".
870

Glenn Morris's avatar
Glenn Morris committed
871 872 873 874
*** 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
875 876

** Ido
877

878
*** An Ido user manual is now included.
879

880 881 882
*** 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.
883

884 885
*** 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
886 887 888 889 890 891 892 893 894 895 896 897

** 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.
898 899 900 901
`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
902 903 904 905 906
*** 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
907
** New Imenu option `imenu-generic-skip-comments-and-strings'.
Chong Yidong's avatar
Chong Yidong committed
908

Glenn Morris's avatar
Glenn Morris committed
909 910 911
** Info

*** New Info face `info-index-match', used to highlight matches in index
Chong Yidong's avatar
Chong Yidong committed
912 913 914
entries displayed by `Info-index-next', `Info-virtual-index' and
`info-apropos'.

Glenn Morris's avatar
Glenn Morris committed
915 916 917
*** 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
918 919
** JS Mode

Glenn Morris's avatar
Glenn Morris committed
920 921
*** New option `js-switch-indent-offset'.

Chong Yidong's avatar
Chong Yidong committed
922
*** Better indentation of multiple-variable declarations.
Glenn Morris's avatar
Glenn Morris committed
923
If a declaration spans several lines, variables on the following lines
Chong Yidong's avatar
Chong Yidong committed
924 925
are lined up to the first one.

Glenn Morris's avatar
Glenn Morris committed
926
*** Recognition and better indentation of continuations in array comprehensions.
Chong Yidong's avatar
Chong Yidong committed
927

928
** MH-E has been updated to version 8.6 - see separate MH-E-NEWS file.
Chong Yidong's avatar
Chong Yidong committed
929 930

** Octave mode
Glenn Morris's avatar
Glenn Morris committed
931

Xue Fuqiao's avatar
Xue Fuqiao committed
932
*** Font locking for Texinfo comments and new keywords.
Glenn Morris's avatar
Glenn Morris committed
933 934 935

*** Completion in Octave file buffers.

Glenn Morris's avatar
Glenn Morris committed
936
*** ElDoc support.
Glenn Morris's avatar
Glenn Morris committed
937 938 939 940

*** Jump to definition.

*** Documentation lookup/search.
Chong Yidong's avatar
Chong Yidong committed
941

Glenn Morris's avatar
Glenn Morris committed
942
** OPascal mode is the new name for Delphi mode
Chong Yidong's avatar
Chong Yidong committed
943 944

*** All delphi-* variables and functions have been renamed to opascal-*.
Glenn Morris's avatar
Glenn Morris committed
945
Obsolete aliases exist for those likely to have been used externally.
Glenn Morris's avatar
Glenn Morris committed
946

Glenn Morris's avatar
Glenn Morris committed
947
*** The option `delphi-newline-always-indents' has been removed.
Chong Yidong's avatar
Chong Yidong committed
948
Use `electric-indent-mode' instead.
Glenn Morris's avatar
Glenn Morris committed
949

Glenn Morris's avatar
Glenn Morris committed
950
*** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
Chong Yidong's avatar
Chong Yidong committed
951 952 953

** Package

954 955 956 957 958 959 960 961 962 963 964
*** 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.

965
*** New option `package-pinned-packages'.  This is useful if you have multiple
966
archives enabled, with more than one offering a given package that you want.
967

Glenn Morris's avatar
Glenn Morris committed
968