NEWS 99.5 KB
Newer Older
1
GNU Emacs NEWS -- history of user-visible changes.
2

3
Copyright (C) 2010-2013 Free Software Foundation, Inc.
4
See the end of the file for license conditions.
Dave Love's avatar
#  
Dave Love committed
5

6
Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 8
If possible, use M-x report-emacs-bug.

9
This file is about changes in Emacs version 24.
10

11 12
See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
and NEWS.1-17 for changes in older Emacs versions.
13 14 15

You can narrow news to a specific version by calling `view-emacs-news'
with a prefix argument or by typing C-u C-h C-n.
16

Glenn Morris's avatar
Glenn Morris committed
17 18 19 20 21 22
Temporary note:
+++ indicates that the appropriate manual has already been updated.
--- means no change in the manuals is called for.
When you add a new item, please add it without either +++ or ---
so we will look at it and add it to the manual.

23 24

* Installation Changes in Emacs 24.4
25 26 27 28 29 30

** Emacs can be compiled with POSIX ACL support.
This happens by default if a suitable support library is found at
build time, like libacl on GNU/Linux.  To prevent this, use the
configure option `--without-acl'.

31 32
* Startup Changes in Emacs 24.4
* Changes in Emacs 24.4
33

34 35 36 37 38 39 40
+++
** `apropos-variable' is now `apropos-user-option'
`apropos-user-option' shows all user options while `apropos-variable'
shows all variables.  When called with a universal prefix argument,
the two commands swap their behaviors.  When `apropos-do-all' is
non-nil, they output the same results.

41 42 43 44
+++
** `eval-defun' on an already defined defcustom calls the :set function,
if there is one.

45 46 47 48
** 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.

49 50 51
** `initial-buffer-choice' can now specify a function to set up the
initial buffer.

52 53 54 55 56
** ACL support has been added.
+++
*** Emacs preserves the ACL entries of files when backing up.
+++
*** New functions `file-acl' and `set-file-acl' get and set the ACL
57 58 59
entries of a file.  On GNU/Linux, the POSIX ACL interface is used via
libacl.  On MS-Windows, the NT Security APIs are used to emulate the
POSIX ACL interfaces.
60

61
* Editing Changes in Emacs 24.4
62

63 64
** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
bound to <f11> and M-<f10>, respectively.
65

66

67
* Changes in Specialized Modes and Packages in Emacs 24.4
68

69 70
** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.

71 72 73
** completing-read-multiple's separator can now be a regexp.
The default separator is changed to allow surrounding spaces around the comma.

74 75 76 77
** Battery

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

78 79 80 81 82 83 84
** cl-lib

*** New macro cl-tagbody.

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

85 86 87 88 89 90 91 92 93 94 95 96 97 98
** Calc

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

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

99 100 101 102 103 104 105 106 107 108 109
** ERC

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

** Icomplete is a bit more like IDO.
*** key bindings to navigate through and select the completions.
*** The icomplete-separator is customizable, and its default has changed.
*** Removed icomplete-show-key-bindings.

110 111 112 113 114
** Isearch

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

Bill Wohler's avatar
Bill Wohler committed
115 116 117
** MH-E has been updated to MH-E version 8.4.
See MH-E-NEWS for details.

118 119 120 121 122 123 124 125
---
** The unrmail command converts from BABYL to mboxrd rather than mboxo.
Customize `unrmail-mbox-format' to change this.

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

126 127 128
+++
** New function `ses-rename-cell' to give SES cells arbitrary names.

129 130 131 132 133 134 135 136 137
** trace-function was largely rewritten.
New features include:
- no prompting for the destination buffer, unless a prefix-arg was used.
- additionally to prompting for a destination buffer, when a prefix-arg is
  used, the user can enter a "context", i.e. Lisp expression whose value at the
  time the function is entered/exited will be printed along with the function
  name and arguments.  Useful to trace the value of (current-buffer) or
  (point) when the function is invoked.

138 139 140 141 142
** New command `delete-duplicate-lines' has two types of operation:
when its arg ADJACENT is non-nil (when called interactively with C-u C-u)
it works like the utility `uniq'.  Otherwise by default it deletes
duplicate lines everywhere in the region without regard to adjacency.

143 144 145 146 147
** Tramp
+++
*** New connection method "adb", which allows to access Android
devices by the Android Debug Bridge.  The variable `tramp-adb-sdk-dir'
must be set to the Android SDK installation directory.
148 149 150
+++
*** Handlers for `file-acl' and `set-file-acl' for remote machines
which support POSIX ACLs.
151

152 153 154 155 156
** Woman

*** The commands `woman-default-faces' and `woman-monochrome-faces'
are obsolete.  Customize the `woman-* faces instead.

Chong Yidong's avatar
Chong Yidong committed
157 158 159 160
** Obsolete packages:

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

Chong Yidong's avatar
Chong Yidong committed
161 162
*** terminal.el is obsolete; use term.el instead.

163

164
* New Modes and Packages in Emacs 24.4
165 166 167 168 169 170 171
** New nadvice.el package offering lighter-weight advice facilities.
It is layered as:
- add-function/remove-function which can be used to add/remove code on any
  function-carrying place, such as process-filters or `<foo>-function' hooks.
- advice-add/advice-remove to add/remove a piece of advice on a named function,
  much like `defadvice' does.

172
* Incompatible Lisp Changes in Emacs 24.4
173

174 175 176 177
** frame-local variables that affect redisplay do not work any more.
More specifically, the redisplay does not bother to check for a frame-local
value when looking up variables.

178 179 180 181
** nil and "unbound" are indistinguishable in symbol-function.
`symbol-function' never signals `void-function' any more.
`fboundp' returns non-nil if the symbol was `fset' to nil.

182 183
** `defadvice' does not honor the `freeze' flag and cannot advise
special-forms any more.
184

185 186 187 188
** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
VAR was bound to nil which was not tremendously useful and just lead to
spurious warnings about an unused var.

189 190 191 192 193 194
** The return value of `backup-buffer' has changed.
The second argument is no longer an SELinux context, instead it is an
alist of extended attributes as returned by the new function
`file-extended-attributes'.  The attributes can be applied to another
file using `set-file-extended-attributes'.

195
* Lisp changes in Emacs 24.4
196

197 198 199
** Support for filesystem notifications.
Emacs now supports notifications of filesystem changes, such as
creation, modification, and deletion of files.  This requires the
200 201
'inotify' API on GNU/Linux systems.  On MS-Windows systems, this is
supported for Windows XP and newer versions.
202

203 204 205 206 207 208 209 210 211 212
** Face changes

*** The `face-spec-set' is now analogous to `setq' for face specs.
Its third arg now accepts values specifying exactly which face spec to
set (defface, custom, or user spec), and it directly sets the relevant
property using the supplied face spec.

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

213 214 215
*** New face characteristic (supports :underline (:style wave))
specifies whether or not the terminal can display a wavy line.

216
** time-to-seconds is not obsolete any more.
217
** New function special-form-p.
218 219 220
** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
text-property on the first char.

221 222 223
** The `defalias-fset-function' property lets you catch calls to defalias
and redirect them to your own function instead of `fset'.

224 225 226 227 228 229 230 231 232 233 234
** The 9th element returned by `file-attributes' is now unspecified.
Formerly, it was t if the file's gid would change if file were deleted
and recreated.  This value has been inaccurate for years on many
platforms, and nobody seems to have noticed or cared.

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

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

235 236 237 238
** The 6th argument to `copy-file' has been renamed to
`preserve-extended-attributes' as it now handles both SELinux context
and ACL entries.

239 240
* Changes in Emacs 24.4 on non-free operating systems

241 242 243 244 245
+++
** The "generate a backtrace on fatal error" feature now works on MS Windows.
The backtrace is written to the 'emacs_backtrace.txt' file in the
directory where Emacs was running.

Glenn Morris's avatar
Glenn Morris committed
246

247
* Installation Changes in Emacs 24.3
248

249
** The default X toolkit is now Gtk+ version 3.
Glenn Morris's avatar
Glenn Morris committed
250 251 252
If you don't pass `--with-x-toolkit' to configure, or if you use
`--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
Glenn Morris's avatar
Glenn Morris committed
253
You can explicitly require a specific version by passing
Glenn Morris's avatar
Glenn Morris committed
254
`--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
255

256
** New configure option `--enable-link-time-optimization', to utilize
257 258
an appropriate feature provided by GCC since version 4.5.0.

Glenn Morris's avatar
Glenn Morris committed
259 260
** New configure option `--without-all' to disable most of the optional
features (image support, etc.) that are normally enabled by default.
261

Glenn Morris's avatar
Glenn Morris committed
262 263 264 265 266
** New configure option `--enable-gcc-warnings' (for developing/debugging
Emacs).  If building with GCC, this enables compile-time checks that
warn about possibly-questionable C code.  On a recent GNU system there
should be no warnings; on older and on non-GNU systems the generated
warnings may be useful.
267

Glenn Morris's avatar
Glenn Morris committed
268
** The configure option `--enable-use-lisp-union-type' has been
269
renamed to `--enable-check-lisp-object-type', as the resulting
Glenn Morris's avatar
Glenn Morris committed
270 271 272
Lisp_Object type no longer uses a union to implement the compile time
check that this option enables.

Glenn Morris's avatar
Glenn Morris committed
273
** The configure option `--disable-maintainer-mode' has been removed,
274 275
as it was confusingly-named and rarely useful.

Glenn Morris's avatar
Glenn Morris committed
276 277 278 279 280
** The configure options `--program-prefix', `--program-suffix', and
`--program-transform-name' apply to more than just the installed
binaries.  Now they also affect the man pages, icons, and the
etc/emacs.desktop file; but not the info pages, since this would break
links between the various manuals.
281

Glenn Morris's avatar
Glenn Morris committed
282 283
** You can use `NO_BIN_LINK=t make install' to prevent the installation
overwriting "emacs" in the installation bin/ directory with a link
284
to "emacs-VERSION".
Glenn Morris's avatar
Glenn Morris committed
285

286 287
** Emacs uses libtinfo in preference to libncurses, if available.

288 289 290 291
** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
/usr/pkg/lib to the linker search path.  You must add them yourself if
you want them.

292
** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
Glenn Morris's avatar
Glenn Morris committed
293 294 295
(from the bin and libexec directories, respectively).  The former is
no longer relevant, the latter is replaced by lisp (in vc-sccs.el).

Glenn Morris's avatar
Glenn Morris committed
296

297
* Startup Changes in Emacs 24.3
298 299 300

** Emacs no longer searches for `leim-list.el' files beneath the standard
lisp/ directory.  There should not be any there anyway.  If you have
Glenn Morris's avatar
Glenn Morris committed
301
been adding them there, put them somewhere else; e.g., site-lisp.
302

Glenn Morris's avatar
Glenn Morris committed
303 304
** The `--no-site-lisp' command line option now works for Nextstep builds.

Glenn Morris's avatar
Glenn Morris committed
305

306
* Changes in Emacs 24.3
Glenn Morris's avatar
Glenn Morris committed
307

308
** Help
309

310
*** `C-h f' (`describe-function') can now perform autoloading.
311 312 313 314 315 316 317 318 319
When this command is called for an autoloaded function whose docstring
contains a key substitution construct, that function's library is
automatically loaded, so that the documentation can be shown
correctly.  To disable this, set `help-enable-auto-load' to nil.

*** `C-h f' now reports previously-autoloaded functions as "autoloaded",
even after their associated libraries have been loaded (and the
autoloads have been redefined as functions).

320
** ImageMagick
321

322 323
*** Images displayed via ImageMagick now support transparency and the
:background image specification property.
324

325
*** When available, ImageMagick support is automatically enabled.
326 327
It is no longer necessary to call `imagemagick-register-types'
explicitly to install ImageMagick image types; that function is called
328
automatically at startup, or when customizing an imagemagick- option.
Glenn Morris's avatar
Glenn Morris committed
329

330
*** Setting `imagemagick-types-inhibit' to t now disables the use of
Glenn Morris's avatar
Glenn Morris committed
331 332
ImageMagick to view images.  (You must call `imagemagick-register-types'
afterwards if you do not use customize to change this.)
Glenn Morris's avatar
Glenn Morris committed
333

334
*** The new variable `imagemagick-enabled-types' also affects which
335 336 337
ImageMagick types are treated as images.  The function
`imagemagick-filter-types' returns the list of types that will be
treated as images.
338

339 340 341 342
** Minibuffer

*** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
next and previous path separator, respectively.
343

344 345 346 347 348 349 350 351 352 353 354 355 356 357
*** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
in minibuffer prompts.  Just set `minibuffer-eldef-shorten-default'
non-nil before enabling the mode.

** Mode line

*** New option `mode-line-default-help-echo' specifies the help text
(shown in a tooltip or in the echo area) for any part of the mode line
that does not have its own specialized help text.

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

** Server and client
Glenn Morris's avatar
Glenn Morris committed
358

Chong Yidong's avatar
Chong Yidong committed
359 360 361
*** emacsclient now obeys string values for `initial-buffer-choice',
if it is told to open a new frame without specifying any file to visit
or expression to evaluate.
Glenn Morris's avatar
Glenn Morris committed
362

Chong Yidong's avatar
Chong Yidong committed
363 364 365 366 367
*** New option `server-auth-key' specifies a shared server key.

** Emacs now generates backtraces on fatal errors.
On encountering a fatal error, Emacs now outputs a textual description
of the fatal signal, and a short backtrace on platforms like glibc
368
that support backtraces.
369

370 371 372 373 374 375 376 377 378 379
** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
This minor mode replaces `toggle-read-only', which is now obsolete.

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

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

Chong Yidong's avatar
Chong Yidong committed
380 381
** If your Emacs was built from a bzr checkout, the new variable
`emacs-bzr-version' contains information about the bzr revision used.
382

383
** New option `create-lockfiles' specifies usage of lockfiles.
Chong Yidong's avatar
Chong Yidong committed
384 385
It defaults to t.  Changing it to nil inhibits the creation of lock
files (use this with caution).
386

387 388
** New option `enable-remote-dir-locals', if non-nil, allows directory-local
variables on remote hosts.
389

Chong Yidong's avatar
Chong Yidong committed
390 391 392
** The entry for PCL-CVS has been removed from the Tools menu.
The PCL-CVS commands are still available via the keyboard.

393 394 395 396
** Using "unibyte: t" in Lisp source files is obsolete.
Use "coding: raw-text" instead.

** Internationalization
Glenn Morris's avatar
Glenn Morris committed
397

Chong Yidong's avatar
Chong Yidong committed
398
*** New language environment: Persian.
Glenn Morris's avatar
Glenn Morris committed
399

Chong Yidong's avatar
Chong Yidong committed
400 401
*** New input method `vietnamese-vni'.

402
** Nextstep (GNUstep / Mac OS X) port
Glenn Morris's avatar
Glenn Morris committed
403

Glenn Morris's avatar
Glenn Morris committed
404
*** Support for fullscreen and the frame parameter fullscreen.
Glenn Morris's avatar
Glenn Morris committed
405

406 407 408
*** A file dialog is used for open/save operations initiated from the
menu/toolbar.

Glenn Morris's avatar
Glenn Morris committed
409

410
* Editing Changes in Emacs 24.3
411

412
** Search and Replace
413

Chong Yidong's avatar
Chong Yidong committed
414 415 416 417
*** Non-regexp Isearch now performs "lax" space matching.
Each sequence of spaces in the supplied search string may match any
sequence of one or more whitespace characters, as specified by the
variable `search-whitespace-regexp'.  (This variable is also used by a
Glenn Morris's avatar
Glenn Morris committed
418
similar existing feature for regexp Isearch.)
Glenn Morris's avatar
Glenn Morris committed
419

Chong Yidong's avatar
Chong Yidong committed
420 421
*** New Isearch command `M-s SPC' toggles lax space matching.
This applies to both ordinary and regexp Isearch.
Glenn Morris's avatar
Glenn Morris committed
422

Chong Yidong's avatar
Chong Yidong committed
423 424 425
*** New option `replace-lax-whitespace'.
If non-nil, `query-replace' uses flexible whitespace matching too.
The default is nil.
Glenn Morris's avatar
Glenn Morris committed
426

427 428 429 430
*** Global `M-s _' starts a symbol (identifier) incremental search,
and `M-s _' in Isearch toggles symbol search mode.
`M-s c' in Isearch toggles search case-sensitivity.

431
** Navigation commands
432

433 434 435 436 437 438 439 440 441 442
*** New binding `M-g c' for `goto-char'.

*** New binding `M-g TAB' for `move-to-column'.

*** `M-g TAB' (`move-to-column') prompts for a column number if called
interactively with no prefix arg.  Previously, it moved to column 1.

** New option `yank-handled-properties' allows processing of text
properties on yanked text, in ways that are more general than just
removing them (as is done by `yank-excluded-properties').
443 444 445 446 447

** New option `delete-trailing-lines' specifies whether
M-x delete-trailing-whitespace should delete trailing lines at the end
of the buffer.  It defaults to t.

Chong Yidong's avatar
Chong Yidong committed
448
** `C-u M-=' now counts lines/words/characters in the entire buffer.
449

450 451
** `C-x 8 RET' is now bound to `insert-char', which is now a command.
`ucs-insert' is now an obsolete alias for `insert-char'.
452

453 454 455
** The `z' key no longer has a binding in most special modes.
It used to be bound to `kill-this-buffer', but `z' is too easy to
accidentally type.
Chong Yidong's avatar
Chong Yidong committed
456

457 458
** New command `C-x r M-w' (`copy-rectangle-as-kill').
It copies the region-rectangle as the last rectangle kill.
Chong Yidong's avatar
Chong Yidong committed
459

460
** Registers
Chong Yidong's avatar
Chong Yidong committed
461

Glenn Morris's avatar
Glenn Morris committed
462
*** `C-x r +' is now overloaded to invoke `append-to-register'.
Chong Yidong's avatar
Chong Yidong committed
463 464

*** New option `register-separator' specifies the register containing
Glenn Morris's avatar
Glenn Morris committed
465 466
the text to put between collected texts for use with
M-x append-to-register and M-x prepend-to-register.
467

Glenn Morris's avatar
Glenn Morris committed
468

469
* Changes in Specialized Modes and Packages in Emacs 24.3
Julien Danjou's avatar
Julien Danjou committed
470

471
** Common Lisp emulation (CL)
Chong Yidong's avatar
Chong Yidong committed
472

473
*** CL's main entry is now (require 'cl-lib).
Glenn Morris's avatar
Glenn Morris committed
474 475 476
`cl-lib' is like the old `cl' except that it uses the namespace cleanly;
i.e., all its definitions have the "cl-" prefix (and internal definitions
use the "cl--" prefix).
477

Glenn Morris's avatar
Glenn Morris committed
478 479 480 481 482
If `cl' provided a feature under the name `foo', then `cl-lib'
provides it under the name `cl-foo' instead; with the exceptions of the
few `cl' definitions that had to use `foo*' to avoid conflicts with
pre-existing Elisp entities.  These have been renamed to `cl-foo'
rather than `cl-foo*'.
483

Glenn Morris's avatar
Glenn Morris committed
484
The old `cl' is now deprecated and is mainly just a bunch of aliases that
Glenn Morris's avatar
Glenn Morris committed
485
provide the old, non-prefixed names.  Some exceptions are listed below:
486

487 488
*** `cl-flet' is not like `flet' (which is deprecated).
Instead it obeys the behavior of Common-Lisp's `flet'.
Glenn Morris's avatar
Glenn Morris committed
489 490
In particular, in cl-flet function definitions are lexically scoped,
whereas in flet the scoping is dynamic.
491 492

*** `cl-labels' is slightly different from `labels'.
Glenn Morris's avatar
Glenn Morris committed
493 494 495 496
The difference is that it relies on the `lexical-binding' machinery
(as opposed to the `lexical-let' machinery used previously) to capture
definitions in closures, so such closures will only work if `lexical-binding'
is in use.
497

Glenn Morris's avatar
Glenn Morris committed
498
*** `cl-letf' is not exactly like `letf'.
499 500
The only difference is in details that relate to some deprecated usage
of `symbol-function' in place forms.
Glenn Morris's avatar
Glenn Morris committed
501

502
*** `progv' was rewritten to use the `let' machinery.
Glenn Morris's avatar
Glenn Morris committed
503 504
A side effect is that variables without corresponding values are bound
to nil rather than being made unbound.
505

Glenn Morris's avatar
Glenn Morris committed
506 507 508
*** The following methods of extending `setf' are obsolete
(use features from gv.el instead):
`define-modify-macro' (use `gv-letplace')
Glenn Morris's avatar
Glenn Morris committed
509 510
`defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
`define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
Glenn Morris's avatar
Glenn Morris committed
511
`get-setf-method' no longer exists (see "Incompatible Lisp Changes")
Glenn Morris's avatar
Glenn Morris committed
512

513
** Diff mode
Chong Yidong's avatar
Chong Yidong committed
514

515 516 517 518 519
*** Changes are now highlighted using the same color scheme as in
modern VCSes.  Deletions are displayed in red (new faces
`diff-refine-removed' and `smerge-refined-removed', and new definition
of `diff-removed'), insertions in green (new faces `diff-refine-added'
and `smerge-refined-added', and new definition of `diff-added').
Chong Yidong's avatar
Chong Yidong committed
520

521 522 523
*** The variable `diff-use-changed-face' defines whether to use the
face `diff-changed', or `diff-removed' and `diff-added' to highlight
changes in context diffs.
Glenn Morris's avatar
Glenn Morris committed
524

525 526
*** The new command `diff-delete-trailing-whitespace' removes trailing
whitespace introduced by a diff.
Chong Yidong's avatar
Chong Yidong committed
527

528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547
** Ediff now uses the same color scheme as Diff mode.

** Python mode

A new version of python.el, which provides several new features, including:
per-buffer shells, better indentation, Python 3 support, and improved
shell-interaction compatible with iPython (and virtually any other
text based shell).

*** Some user options have been replaced/renamed, including (old -> new):
**** python-indent -> python-indent-offset
**** python-guess-indent -> python-indent-guess-indent-offset
**** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
**** python-use-skeletons -> python-skeleton-autoinsert

*** Some user options have been removed, including:

**** `python-indent-string-contents': Strings are never indented.

**** `python-honour-comment-indentation':
548
Comments are always considered as indentation markers.
549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583

**** `python-continuation-offset': Indentation is automatically
calculated in a pep8 compliant way depending on the context.

**** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
Have no direct mapping as the shell interaction is completely different.

**** `python-python-command', `python-jython-command':
Replaced by `python-shell-interpreter'.

**** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
`python-pdbtrack-minor-mode-string', `python-source-modes':
No longer relevant.

*** Some commands have been replaced (old -> new):
**** python-insert-class -> python-skeleton-class
**** python-insert-def -> python-skeleton-def
**** python-insert-for -> python-skeleton-for
**** python-insert-if -> python-skeleton-if
**** python-insert-try/except -> python-skeleton-try
**** python-insert-try/finally -> python-skeleton-try
**** python-insert-while -> python-skeleton-while
**** python-find-function -> python-nav-jump-to-defun
**** python-next-statement -> python-nav-forward-sentence
**** python-previous-statement -> python-nav-backward-sentence
**** python-beginning-of-defun-function -> python-nav-beginning-of-defun
**** python-end-of-defun-function -> python-nav-end-of-defun
**** python-send-buffer -> python-shell-send-buffer
**** python-send-defun -> python-shell-send-defun
**** python-send-region -> python-shell-send-region
**** python-send-region-and-go -> emulate with python-shell-send-region
and python-shell-switch-to-shell
**** python-send-string -> python-shell-send-string
**** python-switch-to-python -> python-shell-switch-to-shell
**** python-describe-symbol -> python-eldoc-at-point
Chong Yidong's avatar
Chong Yidong committed
584

Chong Yidong's avatar
Chong Yidong committed
585 586 587 588 589 590 591 592 593
** D-Bus

*** New variables `dbus-compiled-version' and `dbus-runtime-version'.

*** The D-Bus object manager interface is implemented.

*** Variables of type :(u)int32 and :(u)int64 accept floating points,
if their value does not fit into Emacs's integer range.

Glenn Morris's avatar
Glenn Morris committed
594 595
*** The function `dbus-call-method' is now non-blocking.
It can be interrupted by `C-g'.  `dbus-call-method-non-blocking' is obsolete.
Chong Yidong's avatar
Chong Yidong committed
596

Glenn Morris's avatar
Glenn Morris committed
597
*** Signals can also be sent as unicast messages.
Chong Yidong's avatar
Chong Yidong committed
598 599

*** The argument list of `dbus-register-signal' has been extended,
600
according to the new match rule types of D-Bus.
Chong Yidong's avatar
Chong Yidong committed
601 602 603 604 605

*** `dbus-init-bus' supports private connections.

*** There is a new function `dbus-setenv'.

606 607
** `desktop-path' no longer includes the "." directory.
Desktop files are now located in ~/.emacs.d by default.
Chong Yidong's avatar
Chong Yidong committed
608 609

** Dired
Glenn Morris's avatar
Glenn Morris committed
610

Chong Yidong's avatar
Chong Yidong committed
611 612 613
*** `dired-do-async-shell-command' executes each file sequentially
if the command ends in `;' (when operating on multiple files).
Otherwise, it executes the command on each file in parallel.
Glenn Morris's avatar
Glenn Morris committed
614

Glenn Morris's avatar
Glenn Morris committed
615 616
*** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
`dired-do-chown', and `dired-do-touch' yanks the attributes of the
Chong Yidong's avatar
Chong Yidong committed
617
file at point.
Glenn Morris's avatar
Glenn Morris committed
618

Chong Yidong's avatar
Chong Yidong committed
619
*** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
Glenn Morris's avatar
Glenn Morris committed
620
`DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
Chong Yidong's avatar
Chong Yidong committed
621
mark/unmark/flag all files in the active region.
Glenn Morris's avatar
Glenn Morris committed
622

Chong Yidong's avatar
Chong Yidong committed
623 624 625
*** The minibuffer default for `=' (`dired-diff) has changed.
It is now the backup file for the file at point, if one exists.
In Transient Mark mode the default is the file at the active mark.
Glenn Morris's avatar
Glenn Morris committed
626

Chong Yidong's avatar
Chong Yidong committed
627 628 629
*** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
The global binding for `M-=', `count-words-region' is in effect.

Glenn Morris's avatar
Glenn Morris committed
630 631
** ERC

632 633
*** New module "notifications", which can send a notification when you
receive a private message or your nickname is mentioned.
Glenn Morris's avatar
Glenn Morris committed
634 635 636

*** ERC will look up server/channel names via auth-source and use any
channel keys found.
Chong Yidong's avatar
Chong Yidong committed
637

Glenn Morris's avatar
Glenn Morris committed
638 639
*** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
only applies to messages sent by lurkers.
640

641
** reStructuredText mode
Chong Yidong's avatar
Chong Yidong committed
642

643 644 645
*** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
fontification, comment handling, and customization have all been revised
and improved.
Chong Yidong's avatar
Chong Yidong committed
646

647
*** Support for `imenu' and `which-function-mode'.
Chong Yidong's avatar
Chong Yidong committed
648

649 650
*** The reStructuredText syntax is more closely covered.
Sphinx support has been improved.
Chong Yidong's avatar
Chong Yidong committed
651

652
*** `rst-insert-list' inserts new list or continues existing lists.
Chong Yidong's avatar
Chong Yidong committed
653

654
*** A negative prefix argument always works for `rst-adjust'.
Chong Yidong's avatar
Chong Yidong committed
655

656
*** The window configuration is reset after displaying a TOC.
657

658
*** The constant `rst-version' describes the rst.el package version.
Glenn Morris's avatar
Glenn Morris committed
659

660
** Shell Script mode
661

662
*** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
663

664
*** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
665

666
*** `sh-use-smie' lets you choose a new indentation and navigation code.
667

668
** VHDL mode
669

670
*** The free software compiler GHDL is supported (and now the default).
671

672
*** Support for the VHDL-AMS packages has been added/updated.
673

674
*** Updated to the 2002 revision of the VHDL standard.
675

676
*** Accepts \r and \f as whitespace.
677

678
** Apropos
679

680 681 682
*** The faces used by Apropos are now directly customizable.
These faces are named `apropos-symbol', `apropos-keybinding', and so on;
see the `apropos' Custom group for details.
683

684 685
*** The old options whose values specified faces to use have been removed
(i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
686

687
** Buffer Menu
688

689
*** This package has been rewritten to use Tabulated List mode.
690

691 692
*** Option `Buffer-menu-buffer+size-width' is now obsolete.
Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
693

694
** Calendar
695

696 697
*** You can customize the header text that appears above each calendar month.
See the variable `calendar-month-header'.
698

699
*** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
700

701 702
*** The calendars produced by cal-html include holidays.
Customize `cal-html-holidays' to change this.
703

704
** Compile has a new option `compilation-always-kill'.
705

706
** Customize
Chong Yidong's avatar
Chong Yidong committed
707

708
*** `custom-reset-button-menu' now defaults to t.
Chong Yidong's avatar
Chong Yidong committed
709

710 711 712
*** Non-option variables are never matched in `customize-apropos' and
`customize-apropos-options' (i.e., the prefix argument does nothing for
these commands now).
713

Chong Yidong's avatar
Chong Yidong committed
714
** Term
715

Glenn Morris's avatar
Glenn Morris committed
716 717
*** The variables `term-default-fg-color' and `term-default-bg-color'
are now deprecated in favor of the customizable face `term'.
718

Glenn Morris's avatar
Glenn Morris committed
719 720 721
*** You can customize how to display ANSI terminal colors and styles
by customizing the corresponding `term-color-<COLOR>',
`term-color-underline' and `term-color-bold' faces.
722

Michael Albinus's avatar
Michael Albinus committed
723
** Tramp
Glenn Morris's avatar
Glenn Morris committed
724

Glenn Morris's avatar
Glenn Morris committed
725
*** The syntax has been extended in order to allow ad-hoc proxy definitions.
Michael Albinus's avatar
Michael Albinus committed
726

Glenn Morris's avatar
Glenn Morris committed
727
*** Remote processes are now also supported on remote MS-Windows hosts.
Michael Albinus's avatar
Michael Albinus committed
728

729
** URL
Glenn Morris's avatar
Glenn Morris committed
730

731 732 733
*** Structs made by `url-generic-parse-url' have nil `attributes' slot.
Previously, this slot stored semicolon-separated attribute-value pairs
appended to some imap URLs, but this is not compatible with RFC 3986.
Glenn Morris's avatar
Glenn Morris committed
734
So now the `filename' slot stores the entire path and query components,
735
and the `attributes' slot is always nil.
Glenn Morris's avatar
Glenn Morris committed
736

737 738 739 740
*** New function `url-encode-url' for encoding a URI string.
The `url-retrieve' function now uses this to encode its URL argument,
in case that is not properly encoded.

741 742 743
** notifications.el supports now version 1.2 of the Notifications API.
The function `notifications-get-capabilities' returns the supported
server properties.
Chong Yidong's avatar
Chong Yidong committed
744

745 746 747
** Flymake uses fringe bitmaps to indicate errors and warnings.
See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
`flymake-warning-bitmap'.
Chong Yidong's avatar
Chong Yidong committed
748

749 750 751
** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
specifying URL types that should be converted to remote file names at
the FFAP prompt.  The default is now '("ftp").
Chong Yidong's avatar
Chong Yidong committed
752

753 754
** New Ibuffer `derived-mode' filter, bound to `/ M'.
The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
Chong Yidong's avatar
Chong Yidong committed
755

756 757
** New option `mouse-avoidance-banish-position' specifies where the
`banish' mouse avoidance setting moves the mouse.
758

759 760
** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
closing brackets to be aligned with the line of the opening bracket.
Chong Yidong's avatar
Chong Yidong committed
761

762
** In Proced mode, new command `proced-renice' renices marked processes.
Chong Yidong's avatar
Chong Yidong committed
763

764 765 766
** New option `async-shell-command-buffer' specifies the buffer to use
for a new asynchronous `shell-command' when the default output buffer
`*Async Shell Command*' is already in use.
Chong Yidong's avatar
Chong Yidong committed
767

768 769 770 771
** SQL mode has a new option `sql-db2-escape-newlines'.
If non-nil, newlines sent to the command interpreter will be escaped
by a backslash.  The default does not escape the newlines and assumes
that the sql statement will be terminated by a semicolon.
Chong Yidong's avatar
Chong Yidong committed
772

773 774 775
** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
(and modes that derive from it), sorts the column at point, or the Nth
column if a numeric prefix argument is given.
Chong Yidong's avatar
Chong Yidong committed
776

Glenn Morris's avatar
Glenn Morris committed
777
** `which-func-modes' now defaults to t, so Which Function mode, when
778
enabled, applies to all applicable major modes.
Chong Yidong's avatar
Chong Yidong committed
779

780
** `winner-mode-hook' now runs when the mode is disabled, as well as when
Glenn Morris's avatar
Glenn Morris committed
781
it is enabled.
Chong Yidong's avatar
Chong Yidong committed
782

783 784 785 786
** Follow mode no longer works by using advice.
The option `follow-intercept-processes' has been removed.

** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
Chong Yidong's avatar
Chong Yidong committed
787

Stefan Monnier's avatar
Stefan Monnier committed
788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810
** Hooks renamed to avoid obsolete "-hooks" suffix:
*** semantic-lex-reset-hooks -> semantic-lex-reset-functions
*** semantic-change-hooks -> semantic-change-functions
*** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
*** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
*** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
*** semanticdb-save-database-hooks -> semanticdb-save-database-functions
*** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
*** rcirc-sentinel-hooks -> rcirc-sentinel-functions
*** rcirc-receive-message-hooks -> rcirc-receive-message-functions
*** rcirc-activity-hooks -> rcirc-activity-functions
*** rcirc-print-hooks -> rcirc-print-functions
*** dbus-event-error-hooks -> dbus-event-error-functions
*** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
*** checkdoc-style-hooks -> checkdoc-style-functions
*** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
*** archive-extract-hooks -> archive-extract-hook
*** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
*** hfy-post-html-hooks -> hfy-post-html-hook
*** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
*** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
*** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
*** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
Chong Yidong's avatar
Chong Yidong committed
811

812
** Obsolete packages
Glenn Morris's avatar
Glenn Morris committed
813

814 815 816 817
*** assoc.el
In most cases, assoc+member+push+delq work just as well.
And in any case it's just a terrible package: ugly semantics, terrible
inefficiency, and not namespace-clean.
818
*** bruce.el
Glenn Morris's avatar
Glenn Morris committed
819
*** cust-print.el
Glenn Morris's avatar
Glenn Morris committed
820
*** ledit.el
Glenn Morris's avatar
Glenn Morris committed
821
*** mailpost.el
822
*** mouse-sel.el
823
*** patcomp.el
824

Glenn Morris's avatar
Glenn Morris committed
825

826
* Incompatible Lisp Changes in Emacs 24.3
827

828 829 830 831
** Docstrings starting with `*' no longer indicate user options.
Only variables defined using `defcustom' are considered user options.
The function `user-variable-p' is now an obsolete alias for
`custom-variable-p'.
832

833 834 835 836
** The return values of `defalias', `defun' and `defmacro' have changed,
and are now undefined.  For backwards compatibility, `defun' and
`defmacro' currently return the name of the newly defined
function/macro, but this should not be relied upon.
837

Glenn Morris's avatar
Glenn Morris committed
838 839
** `random' by default now returns a different random sequence in
every Emacs run.  Use `(random S)', where S is a string, to set the
840 841 842
random seed to a value based on S, in order to get a repeatable
sequence in later calls.

843 844 845 846
** If the NEWTEXT arg to `replace-match' contains a substring "\?",
that substring is inserted literally even if the LITERAL arg is
non-nil, instead of causing an error to be signaled.

847 848 849
** `select-window' now always makes the window's buffer current.
It does so even if the window was selected before.

850 851 852
** The function `x-select-font' can return a font spec, instead of a
font name as a string.  Whether it returns a font spec or a font name
depends on the graphical library.
853

854 855 856
** `face-spec-set' no longer sets frame-specific attributes when the
third argument is a frame (that usage was obsolete since Emacs 22.2).

857
** `set-buffer-multibyte' now signals an error in narrowed buffers.
858

859 860 861 862 863 864
** The CL package's `get-setf-method' function no longer exists.
Generalized variables are now part of core Emacs Lisp, and implemented
differently to the way cl.el used to do it.  It is not possible to
define a compatible replacement for `get-setf-method'.  See the file
gv.el for internal details of the new implementation.

865 866 867
** The arguments of `dbus-register-signal' are no longer just strings,
but keywords or keyword-string pairs.  The old argument list will
still be supported for Emacs 24.x.
868

869
** Miscellaneous name changes
Glenn Morris's avatar
Glenn Morris committed
870 871
Some Lisp symbols have been renamed to correct their spelling,
or to be more consistent with standard Emacs terminology.
872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889

*** Renamed functions
**** hangul-input-method-inactivate -> hangul-input-method-deactivate
**** inactivate-input-method -> deactivate-input-method
**** quail-inactivate -> quail-deactivate
**** robin-inactivate -> robin-deactivate
**** viper-inactivate-input-method -> viper-deactivate-input-method
**** viper-inactivate-input-method-action ->
     viper-deactivate-input-method-action
**** ucs-input-inactivate -> ucs-input-deactivate

*** Renamed hooks
The old hooks are still supported for backward compatibility, but they
are deprecated and will be removed eventually.
**** input-method-inactivate-hook -> input-method-deactivate-hook
**** robin-inactivate-hook -> robin-deactivate-hook
**** quail-inactivate-hook -> quail-deactivate-hook

890
*** Renamed variables
891 892 893 894
**** follow-deactive-menu -> follow-inactive-menu
**** inactivate-current-input-method-function ->
     deactivate-current-input-method-function

Glenn Morris's avatar
Glenn Morris committed
895 896
** Some obsolete functions, variables, and faces have been removed:
*** `last-input-char', `last-command-char', `unread-command-char'
897 898
*** `facemenu-unlisted-faces'
*** `rmail-decode-mime-charset'
899 900 901
*** `iswitchb-read-buffer'
*** `sc-version', `sc-submit-bug-report'
*** `set-char-table-default'
Glenn Morris's avatar
Glenn Morris committed
902
*** `string-to-sequence' (use `string-to-list' or `string-to-vector')
903
*** `compile-internal'
Glenn Morris's avatar
Glenn Morris committed
904
*** `modeline'
905
*** `mode-line-inverse-video'
Glenn Morris's avatar
Glenn Morris committed
906
*** `follow-mode-off-hook'
907
*** `cvs-commit-buffer-require-final-newline'
Glenn Morris's avatar
Glenn Morris committed
908
(use `log-edit-require-final-newline' instead)
909 910 911 912 913 914
*** `cvs-changelog-full-paragraphs'
(use `log-edit-changelog-full-paragraphs' instead)
*** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
*** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
*** `vc-master-templates' (use `vc-handled-backends' instead)
*** `vc-checkout-carefully'
915

Glenn Morris's avatar
Glenn Morris committed
916

917
* Lisp changes in Emacs 24.3
918

919
** CL-style generalized variables are now in core Elisp.
Chong Yidong's avatar
Chong Yidong committed
920
`setf' is autoloaded; `push' and `pop' accept generalized variables.
921 922
You can define your own generalized variables using `gv-define-simple-setter',
`gv-define-setter', etc.
923

924 925 926 927 928 929 930 931 932 933 934 935 936
** Emacs tries to macroexpand interpreted (non-compiled) files during load.
This can significantly speed up execution of non-byte-compiled code,
but can also bump into previously unnoticed cyclic dependencies.
These are generally harmless: they will simply cause the macro calls
to be left for later expansion (as before), but will result in a
warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
You may wish to restructure your code so this does not happen.

** New sampling-based Elisp profiler.
Try M-x profiler-start, do some work, and then call M-x profiler-report.
When finished, use M-x profiler-stop.  The sampling rate can be based on
CPU time or memory allocations.

937 938 939
** `defun' also accepts a (declare DECLS) form, like `defmacro'.
The interpretation of the DECLS is determined by `defun-declarations-alist'.

940 941 942
** New macros `setq-local' and `defvar-local'.

** Face underlining can now use a wave.
Glenn Morris's avatar
Glenn Morris committed
943

944
** `read-regexp' has a new argument HISTORY; the first argument PROMPT
945
of `read-regexp' accepts a string ending with a colon and space, and its
Glenn Morris's avatar
Glenn Morris committed
946
second argument DEFAULTS can be a list of strings accessible via `M-n'