NEWS 25.4 KB
Newer Older
1
GNU Emacs NEWS -- history of user-visible changes.
2

Glenn Morris's avatar
Glenn Morris committed
3
Copyright (C) 2007, 2008 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 emacs-pretest-bug@gnu.org.
7 8
If possible, use M-x report-emacs-bug.

9
This file is about changes in Emacs version 23.
10

11 12
See files 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 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 25

* About external Lisp packages

26

27
* Installation Changes in Emacs 23.1
28

29 30
** The default X toolkit is now Gtk+, rather than Lucid.

31 32 33
** The Mac Carbon port is no longer supported.
Instead, use... [what?]

34 35
** configure now checks for libgif before libungif when searching for
a GIF library.
Glenn Morris's avatar
Glenn Morris committed
36

Glenn Morris's avatar
Glenn Morris committed
37 38
** Support for systems without alloca has been removed.

39 40
** Support for Sun windows has been removed.

41 42 43
** Support for many obsolete platforms has been removed.
See the list at the end of etc/MACHINES for details.

Glenn Morris's avatar
Glenn Morris committed
44 45
** The `emacstool' utility has been removed.

Michael Albinus's avatar
Michael Albinus committed
46 47
** The new configuration option "--with-dbus" enables D-Bus language
bindings for Emacs.
48 49 50 51 52 53 54

** The configure options `--with-gcc', `--without-gcc' have been removed.
Configure will use gcc by default.  Set the CC environment variable if
you need control over which C compiler is used.

** The configure option `--with-gtk' has been removed. Gtk is now the
default toolkit, but you can use --with-x-toolkit=gtk if necessary.
Nick Roberts's avatar
Nick Roberts committed
55 56 57

* Changes in Emacs 23.1

58 59 60 61 62 63
** Emacs now supports using both X displays and ttys in one session.
You can also use any number of different ttys.

You can test for the presence of this feature in your Lisp code by
testing for the `multi-tty' feature.

Jan Djärv's avatar
Jan Djärv committed
64 65 66 67 68 69
** Emacs now supports the XEmbed specification.
You can embed Emacs in another application on X11.  The new command line option
--parent-id is used to pass the parent window id to Emacs.  See
http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
for details about XEmbed.

Thien-Thi Nguyen's avatar
Thien-Thi Nguyen committed
70 71 72 73
** Emacs comes with a new set of icons for Mac OS X.
OS-X-style icons (an application icon and a relevant document icon)
were contributed by Kentaro Ohkouchi.
Source files for these icons can be found in Emacs.app/Contents/Resources.
74
PNG versions are available as etc/images/icons/emacs*_mac.png.
Thien-Thi Nguyen's avatar
Thien-Thi Nguyen committed
75

76 77 78 79 80 81 82
** Built-in functions (subr) can now have an interactive specification
that is not a prompt string.  If the `intspec' parameter of a `DEFUN'
starts with a `(', the string is evaluated as a Lisp form.

** set-file-modes is now interactive and can take the mode value in
symbolic notation thanks to auxiliary functions.

83 84 85
** split-window-preferred-function specifies whether display-buffer should
split windows vertically or horizontally.

86 87 88 89 90
** Emacsclient has been extended to support opening a new terminal
frame.  Its behavior has been changed to open a new Emacs frame by
default.  Use the -c option to get the old behavior of opening files in
the currently selected Emacs frame.

91 92
** The refcards are now shipped as PDF files.

93 94
** Emacs now supports the SVG image format through librsvg2.

95
** If you set find-file-confirm-nonexistent-file to t, then C-x C-f
Stefan Monnier's avatar
Stefan Monnier committed
96 97
requires confirmation before opening a non-existent file.

Nick Roberts's avatar
Nick Roberts committed
98 99 100 101 102
** If the gpm mouse server is running and t-mouse-mode enabled, Emacs uses a
Unix socket in a GNU/Linux console to talk to server, rather than faking events
using the client program mev.  This C level approach provides mouse
highlighting, and help echoing in the minibuffer.

103 104 105 106
** The new variable next-error-recenter specifies how next-error should
recenter the visited source file.  Its value can be a number (for example,
0 for top line, -1 for bottom line), or nil for no recentering.

107 108
** C-l is bound to the new command recenter-top-bottom, rather than recenter.

Juanma Barranquero's avatar
Juanma Barranquero committed
109
** The mode-line displays a `@' if the default-directory for the current buffer
Nick Roberts's avatar
Nick Roberts committed
110
is on a remote machine, or a hyphen otherwise.
111

112 113 114
** The mode-line displays a mode menu when mouse-1 is clicked on a minor mode,
in the same way as it already did for major modes.

Juanma Barranquero's avatar
Juanma Barranquero committed
115
** The new command balance-windows-area balances windows both vertically
116
and horizontally.
117 118 119

** The new command close-display-connection can be used to close a connection
to a remote display, e.g. because the display is about to become unreachable.
120 121 122

** The command shell prompts for the default directory, when it is
called with a prefix, and the default directory is a remote file name.
Juanma Barranquero's avatar
Juanma Barranquero committed
123
This is because some file name handlers (like ange-ftp) are not able to
124
run processes remotely.
125 126 127

** The new command `display-time-world' starts an updating time display
using several time zones, in a buffer.
128

129
* Startup Changes in Emacs 23.1
130

131 132 133 134
** New user option `initial-buffer-choice' specifies what to display
after starting Emacs: startup screen, *scratch* buffer, visiting a
file or directory.

135 136 137 138
** New alias `argv' for `command-line-args-left'
This is a convenience alias, so that one can write `(pop argv)'
inside of --eval command line arguments in order to access
following arguments.
139 140

** The abbrev file is no longer read at startup in batch mode.
141

142
* Incompatible Editing Changes in Emacs 23.1
Kim F. Storm's avatar
Kim F. Storm committed
143

144 145 146 147 148
+++
** In Dired-x, all command guesses for ! are now added to the default
list accessible by M-n instead of pushing all guesses temporarily into
the history list.

Richard M. Stallman's avatar
Richard M. Stallman committed
149

150
* Editing Changes in Emacs 23.1
Richard M. Stallman's avatar
Richard M. Stallman committed
151

152 153 154 155 156
+++
** C-M-% now shows replacement as it would look in the buffer, with
`\N' and `\&' substituted according to the match.  Old behavior can be
restored by customizing `query-replace-show-replacement'.

157 158 159
+++
** M-q now fills the region if the region is active and
`transient-mark-mode' is turned on.  Otherwise, it fills the current
Juri Linkov's avatar
Juri Linkov committed
160
paragraph.
161

Juri Linkov's avatar
Juri Linkov committed
162
+++
Juri Linkov's avatar
Juri Linkov committed
163 164 165 166
** M-$ now checks spelling of the region if the region is active and
`transient-mark-mode' is turned on.  Otherwise, it checks spelling of the
word at point.

167 168 169
** TAB now indents the region if the region is active and
`transient-mark-mode' is turned on.

170 171 172
** `use-empty-active-region' controls whether an empty active region
in Transient Mark mode should make commands operate on that empty region.

173 174 175
** C-z now invokes `suspend-frame', C-x C-c now invokes
`save-buffers-kill-terminal'.

176 177
** New command kill-matching-buffers kills buffers whose name matches a regexp.

178 179 180 181 182 183 184
** You can disable kill ring commands from accessing the primary selection
by setting `x-select-enable-primary' to nil.

** If `select-active-regions' is t, setting the mark automatically
makes the new region into the primary selection (for interaction with
other window applications).  If you enable this, you might want to bind
`mouse-yank-primary' to Mouse-2.
185

186 187 188 189
** If `yank-pop-change-selection' is t, rotating the kill ring
also updates the selection or clipboard to the current yank,
just as M-w would do so with the text it copies to the kill ring.

190 191
** Minibuffer changes:

192 193 194
*** In C-x d, if you type M-n you get the visited file name of the
current buffer.

195 196 197 198 199 200 201 202
*** In Dired, a list of commands for ! extracted from mailcap according to
file extensions are added to the default list accessible by M-n.

*** A list of regexp default values is available via M-n for `occur',
`keep-lines', `flush-lines' and `how-many'.  This list includes the active
region in transient-mark-mode, the word under the cursor, the last isearch
regexp, the last isearch string and the last replacement regexp.

203 204 205 206 207 208 209 210
*** isearch started in the minibuffer searches in the minibuffer history.
Reverse isearch commands (C-r, C-M-r) search in previous minibuffer
history elements, and forward isearch commands (C-s, C-M-s) search in
next history elements.  When the reverse search reaches the first history
element, it wraps to the last history element, and the forward search
wraps to the first history element.  When the search is terminated, the
history element containing the search string becomes the current.

211 212

* New Modes and Packages in Emacs 23.1
213

214 215
** FIXME add details of new packages imported from lisp/gnus.

216 217 218 219 220 221
** The package doc-view.el has been added.  It supports viewing of PDF,
PostScript and DVI documents inside an Emacs buffer by converting the
document to a set of PNG images first.  One can also search for a
regular expression in the document.  The commentary of the file explains
its usage.

Glenn Morris's avatar
Glenn Morris committed
222 223 224
** The nXML package has been added.
[FIXME someone who uses this, please write a brief description.]

Thien-Thi Nguyen's avatar
Thien-Thi Nguyen committed
225
** A new game called `bubbles' has been added.
Thien-Thi Nguyen's avatar
Thien-Thi Nguyen committed
226

Kim F. Storm's avatar
Kim F. Storm committed
227
** minibuffer-indicate-depth-mode shows the minibuffer depth in the prompt.
228

Michael Olson's avatar
Michael Olson committed
229 230 231 232 233
** Remember Mode (remember.el) is now included with Emacs.  It is a
mode for quickly jotting down things to remember.  Included with
remember.el is a backend that can save notes to a Diary file.  Please
consult the Remember Manual for usage details.

Michael Albinus's avatar
Michael Albinus committed
234 235 236 237
** D-Bus language bindings for Elisp are provided by the package
dbus.el and by extensions to the C modules of Emacs.  D-Bus is an
inter-process communication mechanism for applications residing on the
same host, based on messages.  See the manual for further details.
Michael Olson's avatar
Michael Olson committed
238 239 240 241 242 243 244 245

** EasyPG is now part of the Emacs distribution.
EasyPG is an all-in-one GnuPG interface for Emacs. It consists of two
parts: EasyPG Assistant and EasyPG Library.

EasyPG Assistant is a set of convenient tools to use GnuPG from
Emacs. EasyPG Library is a sort of an elisp port of GPGME, a wrapper
library which provides API to access some of the GnuPG functions.
246 247

* Changes in Specialized Modes and Packages in Emacs 23.1
248

249 250 251
** ChangeLog now has function bound to C-c C-f that finds the file in
the current log entry.

Stefan Monnier's avatar
Stefan Monnier committed
252 253 254 255 256 257 258 259 260
** abbrev was rewritten in Elisp and extended with more flexibility.
*** New functions: abbrev-get, abbrev-put, abbrev-table-get, abbrev-table-put,
    abbrev-table-p.
*** Special hook `abbrev-expand-functions' obsoletes `pre-abbrev-expand-hook'.
*** `make-abbrev-table', `define-abbrev', `define-abbrev-table' all take
    extra arguments for arbitrary properties.
*** New variable `abbrev-minor-mode-table-alist'.
*** `local-abbrev-table' can hold a list of abbrev-tables.
*** Abbrevs have now the following special properties:
261
    `:count', `:system', `:enable-function', `:case-fixed'.
Stefan Monnier's avatar
Stefan Monnier committed
262 263 264 265
*** Abbrev-tables have now the following special properties:
    `:parents', `:case-fixed', `:enable-function', `:regexp',
    `abbrev-table-modiff'.

Martin Rudalics's avatar
Martin Rudalics committed
266 267 268 269 270 271
** Help mode.
*** New macro `with-help-window' should set up help windows better
than `with-output-to-temp-buffer' with `print-help-return-message'.
*** New option `help-window-select' permits to customize whether help
window shall be automatically selected when invoking help.
*** New variable `help-window-point-marker' permits to specify new
272
position of point in help window (for example in `view-lossage').
Martin Rudalics's avatar
Martin Rudalics committed
273 274

** view-remove-frame-by-deleting is now by default t
275
since users found iconification of view-mode frames distracting.
Martin Rudalics's avatar
Martin Rudalics committed
276

Juri Linkov's avatar
Juri Linkov committed
277 278 279 280 281 282
** Isearch mode

*** New command `isearch-occur' bound to `M-s o' in isearch mode
runs `occur' with the current search string.

*** isearch can now search through multiple ChangeLog files.
Juri Linkov's avatar
Juri Linkov committed
283 284 285 286
When running isearch in a ChangeLog file, if the search fails,
then another C-s tries searching the previous ChangeLog,
if there is one (e.g. go from ChangeLog to ChangeLog.12).

287 288
This is enabled if isearch-buffers-multi is non-nil.

Stefan Monnier's avatar
Stefan Monnier committed
289 290 291
** smerge-refine highlights word-level details of changes in conflict.
It's used automatically as you move through conflicts, see smerge-auto-refine.

Dan Nicolaescu's avatar
Dan Nicolaescu committed
292 293 294 295 296 297
** Diff mode

*** diff-refine-hunk highlights word-level details of changes in a diff hunk.
It's used automatically as you move through hunks, see
diff-auto-refine.  It is bound to `C-c C-b'.

Dan Nicolaescu's avatar
Dan Nicolaescu committed
298 299 300
*** diff-add-change-log-entries-other-window iterates through the diff
buffer and tries to create ChangeLog entries for each change.
It is bound to `C-x 4 A'.
Stefan Monnier's avatar
Stefan Monnier committed
301

Stefan Monnier's avatar
Stefan Monnier committed
302
** archive-mode has basic support to browse Rar archives.
Stefan Monnier's avatar
Stefan Monnier committed
303

304 305
** talk.el has been extended for multiple tty support.

306 307 308
** compilation-auto-jump-to-first-error tells `compile' to jump to
the first error encountered during compilations.

309
** In the `copyright' package, you can specify your copyright holders' names.
310 311 312
Only copyright lines with holders matching copyright-names-regexp will be
considered for update.

313 314 315
** eldoc highlights the function argument under point
with the face `eldoc-highlight-function-argument'.

Martin Rudalics's avatar
Martin Rudalics committed
316 317 318
** hide-ifdef-mode permits to shadow ifdef-blocks instead of hiding them.
See option `hide-ifdef-shadow' and function `hide-ifdef-toggle-shadowing'.

319
+++
Juanma Barranquero's avatar
Juanma Barranquero committed
320
** defcustom accepts new keyword arguments, `:safe' and `:risky', which
321 322
set a variable's `safe-local-variable' and `risky-local-variable' property.

323 324 325 326 327 328
** Etags changes.
*** The --members option is now the default.

Use --no-members if you want the old default behaviour of not tagging
struct members in C, members variables in C++ and variables in PHP.

329
** VC
Dan Nicolaescu's avatar
Dan Nicolaescu committed
330 331
*** Clicking on the VC mode-line entry now pops the VC menu.

Dan Nicolaescu's avatar
Dan Nicolaescu committed
332
*** The VC mode-line entry now has a tooltip that explains the VC file status.
333

Dan Nicolaescu's avatar
Dan Nicolaescu committed
334 335
*** VC now supports applying VC operations to a set of files at a time.

Eric S. Raymond's avatar
Eric S. Raymond committed
336 337 338 339 340
This enables VC to work much more effectively with changeset-oriented
version-control systems such as Subversion, GNU Arch, Mercurial, and
Bzr. VC will now pass a multiple-file commit to these systems
as a single changeset.

341 342
*** In VC Annotate mode, you can type V to toggle the annotation visibility.

343 344 345
** log-edit now has a command bound to C-c C-d to show the diff for
the files involved.

346 347
** sgml-electric-tag-pair-mode lets you simultaneously edit matched tag pairs.

Glenn Morris's avatar
Glenn Morris committed
348 349 350 351 352
** The appearance of superscript and subscript in TeX is more customizable.
See the documentation of the variables: tex-fontify-script,
tex-font-script-display, tex-suscript-height-ratio, and
tex-suscript-height-minimum.

Roland Winkler's avatar
Roland Winkler committed
353 354
** BibTeX mode:

Roland Winkler's avatar
Roland Winkler committed
355 356
*** New command `bibtex-initialize' (re)initializes BibTeX buffers. 

Roland Winkler's avatar
Roland Winkler committed
357 358 359 360
*** New `bibtex-entry-format' options `whitespace', `braces', and
`string', disabled by default.

*** New variable `bibtex-cite-matcher-alist' contains rules to
Juanma Barranquero's avatar
Juanma Barranquero committed
361
identify cited keys in BibTeX entries, used by `bibtex-find-crossref'.
Roland Winkler's avatar
Roland Winkler committed
362

Roland Winkler's avatar
Roland Winkler committed
363
*** Command `bibtex-url' allows multiple URLs per entry.
Roland Winkler's avatar
Roland Winkler committed
364

365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393
+++
** Tramp

*** New connection methods.
The new methods "plinkx", "plink2", "psftp", "sftp" and "fish" have
been introduced.  There are also new so-called gateway methods
"tunnel" and "socks".

*** Multihop syntax has been removed.
The pseudo-method "multi" has been removed.  Instead of, multi hops
can be specified by the new variable `tramp-default-proxies-alist'.

*** More default settings.
Default values can be set via the variables `tramp-default-user',
`tramp-default-user-alist' and `tramp-default-host'.

*** Connection information is cached.
In order to reduce connection setup, information about used
connections are kept persistent in a file.  The name of this file is
defined in the variable `tramp-persistency-file-name'.

*** Control of remote processes.
Running processes on a remote host can be controlled by settings in
`tramp-remote-path' and `tramp-remote-process-environment'.

*** Success of remote copy is checked.
When the variable `file-precious-flag' is set, the success of a remote
file copy is checked via the file's checksum.

394 395
** Miscellaneous programming mode changes

Glenn Morris's avatar
Glenn Morris committed
396 397
*** The file etc/emacs.py now supports both Python 2 and 3, meaning
that either version can be used as inferior Python by python.el.
Glenn Morris's avatar
Glenn Morris committed
398

399 400
*** The variable `fortran-line-length' can change the fixed-form line-length.

401 402 403
*** In Fortran mode, M-; is now bound to the standard comment-dwim,
rather than fortran-indent-comment.

404 405
+++
*** (The increasingly misnamed) F90 mode supports Fortran 2003 syntax.
406

Reiner Steib's avatar
Reiner Steib committed
407 408 409 410 411 412 413 414
** Gnus package

*** The Gnus package has been updated

*** There are many news features, bug fixes and improvements.

See the file GNUS-NEWS or the node "No Gnus" in the Gnus manual for details.

415 416 417
** Miscellaneous

*** comint-mode uses `start-file-process' now (see Lisp Changes).
418 419 420
If `default-directory' is a remote file name, subprocesses are started
on the corresponding remote system.

421
*** C-x C-q in dired-mode now runs the command wdired-change-to-wdired-mode,
422 423
and C-x C-q in wdired-mode exits it with asking a question about
saving changes.
424

425 426
*** The new command `eshell/info' runs info in an eshell buffer.

Glenn Morris's avatar
Glenn Morris committed
427 428
*** The pcmpl-unix package supports hostname completion for ssh and scp.

429 430

* Changes in Emacs 23.1 on non-free operating systems
Juri Linkov's avatar
Juri Linkov committed
431

Jason Rumney's avatar
Jason Rumney committed
432 433 434 435 436 437 438
---
** IPv6 is supported on MS-Windows.
Emacs now supports IPv6 on Windows XP and later, and earlier versions
of Windows with third party IPv6 stacks installed. Previously IPv6 was
supported on other platforms, but not on Windows due to using the winsock
1.1 header file, even though Emacs was linking to the winsock 2 library.

Jason Rumney's avatar
Jason Rumney committed
439 440 441 442 443 444 445 446 447 448 449 450
** More keys available on MS-Windows.
Keys normally associated with IMEs, and some exotic keys not normally found
on standard keyboards have been given names so they can be bound to functions
inside Emacs.  If there are keys on your keyboard that have not been exposed
to Emacs in the past, try C-h k to see if they are available now.

Emacs can now bind functions to the extra buttons for media player and
browser control present on some keyboards.  These buttons are disabled
by default, since enabling them prevents their system-wide use when
Emacs has focus.  To enable them, set the variable
w32-pass-multimedia-buttons to nil. See the doc string of that variable
for the list of extra keys that are available.
451 452

* Incompatible Lisp Changes in Emacs 23.1
453

454 455 456
+++
** The function `dired-call-process' has been removed.

457 458 459 460 461 462 463 464
** The variable `byte-compile-warnings' can now be a list starting with `not',
meaning to disable the specified warnings. The meaning of this list
may therefore be the reverse of what you expect (of course, this is
only an issue if you make use of the new `not' syntax). Rather than
checking/manipulating elements directly, use the new functions
`byte-compile-warning-enabled-p', `byte-compile-disable-warning', and
`byte-compile-enable-warning.'

465 466

* Lisp Changes in Emacs 23.1
Juri Linkov's avatar
Juri Linkov committed
467

468 469 470
** `beginning-of-defun-function' now takes one argument, the count
   given to `beginning-of-defun'.

471 472 473
** The variable `inhibit-changing-match-data', if non-nil, prevents the
search and match primitives from changing the match data.

474 475 476 477
+++
** New function `match-substitute-replacement' returns the result of
`replace-match' without actually using it in the buffer.

478 479 480 481 482
** If a local hook function has a non-nil `permanent-local-hook'
property, then `kill-all-local-variables' does not remove it from
the local value of the hook variable.  This means it remains
even if you change major modes.

483 484 485 486 487 488 489
+++
** A list of default values can be specified for the DEFAULT argument of
functions `read-from-minibuffer', `read-string', `read-command',
`read-variable', `read-buffer', `completing-read'.  Elements of this list
are available for inserting into the minibuffer by typing `M-n'.
For empty input these functions return the first element of this list.

490 491 492
** `custom-note-var-changed' tells Custom to treat the change in a certain
variable as having been made within Custom.

493 494
** `frame-inherited-parameters' lets new frames inherit parameters from
the selected frame.
495

496
** Commands should use `use-region-p' to test whether there is
497 498
an active region that they should operate on.

499 500 501 502 503
** `region-active-p' returns non-nil when Transient Mark mode
is enabled and there is an active region.  This is NOT the best function
to use to test whether a command should operate on the region instead
of the usual behavior -- for that, use `use-region-p'.

504 505 506 507 508
** New keymap `input-decode-map' overrides like key-translation-map, but
applies before function-key-map.  Also it is terminal-local contrary to
key-translation-map.  Terminal-specific key-sequences are generally added to
this map rather than to function-key-map now.

509 510 511 512 513
** The new macro `declare-function' suppresses compiler warnings about
undefined functions.  The new `check-declare' package verifies that such
statements are accurate (i.e. the functions are actually defined in
the specified files).

514 515
** The new function `read-color' reads a color name using the minibuffer.

516 517 518
** The new function `face-all-attributes' returns an alist
describing all the basic attributes of a given face.

519 520 521 522
** `interprogram-paste-function' can now return one string or a list
of strings.  In the latter case, Emacs puts the second and following
strings on the kill ring.

523 524
** Changes related to multiple tty support.

Stefan Monnier's avatar
Stefan Monnier committed
525 526 527
*** $TERM is now set to `dumb' for subprocesses.  If you want to know the
$TERM inherited by Emacs you will have to look inside initial-environment.

528 529
*** $DISPLAY is now dynamically inherited from the frame's `display'.

530 531 532 533 534 535 536 537 538 539 540 541 542
*** The `window-system' variable has been made frame-local. The new
`initial-window-system' variable contains the `window-system' value
for the first frame.

*** You can specify a terminal device (`tty' parameter) and a terminal
type (`tty-type' parameter) to `make-terminal-frame'.

*** The new function `make-frame-on-tty' allows you to create a new
frame on another tty device interactively.

*** The function `make-frame-on-display' now works during a tty
session, and `make-frame-on-tty' works during a graphical session.

543
*** New functions: `delete-tty', `suspend-tty', `resume-tty'.
544

Stefan Monnier's avatar
Stefan Monnier committed
545 546
*** A new data type for terminals with functions: `get-device-terminal',
`terminal-parameters', `terminal-parameter', `set-terminal-parameter'.
547

548
*** New hooks: `suspend-tty-functions' and `resume-tty-functions'
549
are called after a tty frame has been suspended or resumed,
Juanma Barranquero's avatar
Juanma Barranquero committed
550
respectively.  The functions are called with the terminal id of the frame
551 552
being suspended/resumed as a parameter.

Stefan Monnier's avatar
Stefan Monnier committed
553
*** New function: `environment'.
554

555
*** New variable: `local-function-key-map'.
Stefan Monnier's avatar
Stefan Monnier committed
556 557 558 559
This in addition to the global function-key-map variable that
already existed.  The global variable is not used directly any more;
instead, the local-function-key-map is initialized so as to inherit from
function-key-map.
560

Stefan Monnier's avatar
Stefan Monnier committed
561 562
*** `initial-environment' holds the environment inherited from Emacs's parent.

563 564 565
*** The `keyboard-translate-table' variable and the terminal and
keyboard coding systems have been made terminal-local.

566 567
*** In addition to the global function-key-map, Emacs has terminal-local
local-function-key-map variables, and uses them instead of the
568 569 570 571
global keymaps to set up translations and function key sequences
relevant to a specific terminal device.


572 573 574 575
** You can now also pass the value of the `invisible' property to invisible-p
to check whether it would cause the text to be invisible.  Convenient when
checking invisibility of text which has no buffer position
(e.g. in before/after-strings).
576

577 578
** Non-breaking space now acts as whitespace.

579
+++
580 581 582 583 584 585 586 587 588
** In `condition-case', a handler can specify "let the debugger run first".

You do this by writing `debug' in the list of conditions to be handled,
like this:

    (condition-case nil
	(foo bar)
      ((debug error) nil))

Stefan Monnier's avatar
Stefan Monnier committed
589 590 591
** The `require-match' argument to `completing-read' accepts a new value
`confirm-only'.

592 593 594
+++
** The regexp form \(?<num>:<regexp>\) specifies the group number explicitly.

595 596 597 598 599 600 601 602 603 604
** New function `window-full-width-p' returns t if a window is as wide
as its frame.

** The new function `split-string-and-unquote' does (what?)

** The new function `combine-and-quote-strings' does (what?)

** The new function `image-refresh' refreshes all images associated
with a given image specification.

Chong Yidong's avatar
Chong Yidong committed
605 606 607 608
+++
** New variable `user-emacs-directory'.
Use this instead of "~/.emacs.d".

609
+++
Juanma Barranquero's avatar
Juanma Barranquero committed
610
** The new function `start-file-process' is similar to `start-process',
611
but obeys file handlers.  The file handler is chosen based on
612 613
`default-directory'.  The functions `start-file-process-shell-command'
and `process-file-shell-command' are also new; they call internally
Juanma Barranquero's avatar
Juanma Barranquero committed
614
`start-file-process' and `process-file', respectively.
615

616 617 618
** The new function `process-lines' executes an external program and
returns its output as a list of lines.

619
+++
620 621 622 623
** `file-remote-p' has new optional parameters IDENTIFICATION and CONNECTED.
IDENTIFICATION specifies which part of the remote identifier has to be
returned.  With CONNECTED passed non-nil, it is checked whether a
remote connection has been established already.
624

625 626 627
** The two new functions `looking-at-p' and `string-match-p' can do
the same matching as `looking-at' and `string-match' without changing
the match data.
628 629 630 631

** The interactive-form of a function can be added post-facto via the
`interactive-form' symbol property.  Mostly useful to add complex interactive
forms to subroutines.
632

633
* New Packages for Lisp Programming in Emacs 23.1
634

635 636 637 638 639 640
** The package isearch-multi.el has been added.  It implements a new mode
`isearch-buffers-minor-mode' that allows isearch to search through
multiple buffers.  In this mode a new variable
`isearch-buffers-next-buffer-function' defines the function to call
to get the next buffer to search in the series of multiple buffers.

Thien-Thi Nguyen's avatar
Thien-Thi Nguyen committed
641 642
** The new package avl-tree.el deals with the AVL tree data structure.

643

Dave Love's avatar
#  
Dave Love committed
644
----------------------------------------------------------------------
645
This file is part of GNU Emacs.
Dave Love's avatar
#  
Dave Love committed
646

647 648
GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
649
the Free Software Foundation; either version 3, or (at your option)
650 651 652 653 654 655
any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
Dave Love's avatar
#  
Dave Love committed
656

657 658 659 660
You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
Dave Love's avatar
#  
Dave Love committed
661

662

Dave Love's avatar
#  
Dave Love committed
663 664 665 666
Local variables:
mode: outline
paragraph-separate: "[ 	]*$"
end:
Miles Bader's avatar
Miles Bader committed
667

Miles Bader's avatar
Miles Bader committed
668
arch-tag: e759449d-88b3-4de4-9900-3a6c3dfa23e2