NEWS 40.4 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 34
** Fonts are handled by new code capable of dealing with multiple font
backends.  This requires the freetype and fontconfig libraries, and
supports local fonts (fonts installed on the machine where Emacs is
running).  Additionally, the Xft library can be used for antialiasing
Glenn Morris's avatar
Glenn Morris committed
35 36 37 38 39
support, the otf library for complex text layout by OpenType fonts,
and the m17n library for text shaping.  Fontconfig-like font names
(e.g. monospace-12) are accepted.  The old font handling code can
be used by passing the configure option `--disable-font-backend'
(also available as a run-time option).
40

Dan Nicolaescu's avatar
Dan Nicolaescu committed
41 42 43
** The new configuration option "--with-dbus" enables D-Bus language
bindings for Emacs.

44
** The Mac Carbon port is no longer supported.
45
Instead, use... [FIXME what?]
46

47 48
** configure now checks for libgif before libungif when searching for
a GIF library.
Glenn Morris's avatar
Glenn Morris committed
49

Glenn Morris's avatar
Glenn Morris committed
50 51
** Support for systems without alloca has been removed.

52 53
** Support for Sun windows has been removed.

54 55 56
** 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
57 58
** The `emacstool' utility has been removed.

59 60 61 62
** 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.

Juanma Barranquero's avatar
Juanma Barranquero committed
63
** The configure option `--with-gtk' has been removed.  Gtk is now the
64
default toolkit, but you can use --with-x-toolkit=gtk if necessary.
Nick Roberts's avatar
Nick Roberts committed
65 66 67

* Changes in Emacs 23.1

68
** Emacs now supports using both X displays and ttys in one session.
Dan Nicolaescu's avatar
Dan Nicolaescu committed
69 70 71 72
Start the server (M-x server-start).  Then `emacsclient -t' creates a
tty frame connected to the running emacs server.  You can also use any
number of different ttys.  `emacsclient -c' creates a new X11 frame on
the current $DISPLAY or a tty frame if $DISPLAY is not set.
73 74 75 76

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

Juanma Barranquero's avatar
Juanma Barranquero committed
77
** The Emacs character set is now a superset of Unicode.
78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106
(It has about four times the code space, which should be plenty).

The internal encoding used for buffers and strings is now
Unicode-based and called `utf-8-emacs'.  utf-8-emacs is backwards
compatible with the UTF-8 encoding of Unicode.  The `emacs-mule'
coding system can still read and write data in the old internal encoding.

Since the internal encoding is also used by default for byte-compiled
files -- i.e. the normal coding system for byte-compiled Lisp files is
now utf-8-Emacs -- Lisp containing non-ASCII characters which is
compiled by Emacs 23 can't be read by earlier versions of Emacs.  Files
compiled by Emacs 20, 21, or 22 are loaded correctly as emacs-mule
(whether or not they contain multibyte characters), which makes loading
them somewhat slower than Emacs 23-compiled files.  Thus it may be worth
recompiling existing .elc files which don't need to be shared with older
Emacsen.

** There are assorted new coding systems/aliases -- see M-x list-coding-systems.

** There is a new charset implementation with many new charsets.
See M-x list-character-sets.  New charsets can be defined conveniently
as tables of unicodes.

The dimension of a charset is now 1, 2, 3, or 4, and the size of each
dimension is no longer limited to 94 or 96.

A dynamic charset priority list is used to infer the charset of
characters for display.

107 108
** There are new Chinese-GBK, Chinese-GB18030, Khmer, Bengali,
Punjabi, Gujarati, Oriya, Telugu, Sinhala, and TaiViet language
109 110
environments.

Jan Djärv's avatar
Jan Djärv committed
111 112 113 114 115 116
** 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.

Glenn Morris's avatar
Glenn Morris committed
117 118 119
** Emacs comes with a new set of default icons.
Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png.
The Emacs 22 icon is available as `emacs22.png' in the same location.
Thien-Thi Nguyen's avatar
Thien-Thi Nguyen committed
120

121 122 123 124 125 126 127
** 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.

128 129 130
** split-window-preferred-function specifies whether display-buffer should
split windows vertically or horizontally.

131 132 133 134 135
** 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.

136 137
** The refcards are now shipped as PDF files.

138 139
** Emacs now supports the SVG image format through librsvg2.

140 141
** Transient Mark Mode is now on by default.

142 143
** mark-even-if-inactive now defaults to t

144 145
** C-SPC C-SPC in transient-mark-mode pushes a mark without activating it.

146
** If you set find-file-confirm-nonexistent-file to t, then C-x C-f
Stefan Monnier's avatar
Stefan Monnier committed
147 148
requires confirmation before opening a non-existent file.

Nick Roberts's avatar
Nick Roberts committed
149 150 151 152 153
** 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.

154 155 156 157
** 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.

Dan Nicolaescu's avatar
Dan Nicolaescu committed
158 159 160
** New command recenter-top-bottom moves the current line to window
center, top and bottom on successive invokations.

161 162
** C-l is bound to the new command recenter-top-bottom, rather than recenter.

Juanma Barranquero's avatar
Juanma Barranquero committed
163
** The mode-line displays a `@' if the default-directory for the current buffer
Nick Roberts's avatar
Nick Roberts committed
164
is on a remote machine, or a hyphen otherwise.
165

166 167 168
** 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
169
** The new command balance-windows-area balances windows both vertically
170
and horizontally.
171 172 173

** 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.
174 175 176

** 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
177
This is because some file name handlers (like ange-ftp) are not able to
178
run processes remotely.
179 180 181

** The new command `display-time-world' starts an updating time display
using several time zones, in a buffer.
182

Glenn Morris's avatar
Glenn Morris committed
183 184 185
** The new function `format-seconds' converts a number of seconds into a
readable string of days, hours, etc.

Glenn Morris's avatar
Glenn Morris committed
186 187
** The new variables `before-init-time' and `after-init-time' record the
value of `current-time' before and after Emacs loads the init files.
188 189 190

** The new function `emacs-uptime' returns the uptime of an Emacs instance.

191 192 193
** The new function `emacs-init-time' returns the duration of the
Emacs initialization.

194 195 196
** The minor modes unify-8859-on-encoding-mode, unify-8859-on-decoding-mode
are obsolete.

197

198
* Startup Changes in Emacs 23.1
199

200 201 202 203 204 205
** The option `inhibit-startup-screen' (with aliases to old names
`inhibit-splash-screen' and `inhibit-startup-message') doesn't inhibit
display of the initial message in the *scratch* buffer.  If you don't
want to display the initial message in the *scratch* buffer at startup,
you can set the option `initial-scratch-message' to nil.

206 207 208 209
** New user option `initial-buffer-choice' specifies what to display
after starting Emacs: startup screen, *scratch* buffer, visiting a
file or directory.

210 211 212 213
** 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.
214

215
** The new command-line option `--disable-font-backend' disables the
216 217
new font backend code at runtime.  This option is not available if
Emacs was compiled without font-backend support.
218

219
** The abbrev file is no longer read at startup in batch mode.
220

221
* Incompatible Editing Changes in Emacs 23.1
Kim F. Storm's avatar
Kim F. Storm committed
222

223 224 225 226 227
+++
** 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
228

229
* Editing Changes in Emacs 23.1
Richard M. Stallman's avatar
Richard M. Stallman committed
230

231 232 233 234 235
+++
** 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'.

236 237 238
+++
** 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
239
paragraph.
240

Juri Linkov's avatar
Juri Linkov committed
241
+++
Juri Linkov's avatar
Juri Linkov committed
242 243 244 245
** 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.

246 247 248
** TAB now indents the region if the region is active and
`transient-mark-mode' is turned on.

249 250 251
** `use-empty-active-region' controls whether an empty active region
in Transient Mark mode should make commands operate on that empty region.

252 253 254
** C-z now invokes `suspend-frame', C-x C-c now invokes
`save-buffers-kill-terminal'.

255 256
** New command kill-matching-buffers kills buffers whose name matches a regexp.

257 258 259 260 261 262 263
** 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.
264

265 266 267 268
** 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.

269
** Minibuffer changes
270

271 272 273 274 275 276
*** Minibuffer input of shell commands now comes with completion.

*** Operations like C-x b and C-x C-f which use switch-to-buffer do not fail
any more when used in a minibuffer or a dedicated window.  Instead, they
fallback on using pop-to-buffer which will use some other window.

277 278 279 280 281 282
*** When M-n in the minibuffer reaches the end of the list of defaults,
it adds the completion list to the end, so next M-n continues putting
completion items to the minibuffer.  The same principle applies to
incremental search commands as well: C-s or C-M-s starts searching
the default values and after the end of defaults they continue
searching minibuffer completion items.
283

284 285 286
*** In C-x d, if you type M-n you get the visited file name of the
current buffer.

287 288 289 290 291 292 293 294
*** 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.

295 296 297 298 299 300 301 302
*** 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.

303 304 305 306 307 308 309 310 311 312
** New faces

*** `mode-line-emphasis' is used to highlight certain mode-line information;
for example while waiting for a VC command to finish.

** Face changes

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

313 314

* New Modes and Packages in Emacs 23.1
315

316
** FIXME add details of new packages imported from lisp/gnus.
317
[Maybe some information from doc/misc/gnus-coding.texi can be reused]
318

319 320 321 322 323 324
** 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.

325 326 327 328 329 330 331 332 333 334 335
** The nXML package has been added.  It is a new mode for editing XML
documents.  nXML mode allows a schema to be associated with the XML
document being edited.  nXML mode uses Relax NG as its schema
language.  The schema is used to provide two key features:

*** Continuous validation.  nXML validates as you type, highlighting
any invalid parts of your document.

*** Completion.  nXML can assist you in entering an element name,
attribute name or data value by using information about what is
allowed by the schema in that context.
Glenn Morris's avatar
Glenn Morris committed
336

337 338
** A new game called `bubbles' has been added.  This is a version of
the "Same Game" with configurable difficulty level.
Thien-Thi Nguyen's avatar
Thien-Thi Nguyen committed
339

Kim F. Storm's avatar
Kim F. Storm committed
340
** minibuffer-indicate-depth-mode shows the minibuffer depth in the prompt.
341

Michael Olson's avatar
Michael Olson committed
342 343 344 345 346
** 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
347 348 349 350
** 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
351

Michael Olson's avatar
Michael Olson committed
352 353 354 355
** EasyPG is now part of the Emacs distribution.  It is an all-in-one
GnuPG interface which includes GnuPG keyring browser, cryptographic
operations on regions and files, and automatic encryption of *.gpg
files.  See the EasyPG Assistant User's Manual for further details.
356

357 358 359 360
** json.el is now included with Emacs.  It is a library for parsing
and generating JSON (JavaScript Object Notation).  JSON is a
lightweight data-interchange format.

361 362 363 364
** Auto Composition Mode is a minor mode that composes characters
automatically when they are displayed.  It is globally on by default.
It uses `auto-composition-function' (default `auto-compose-chars').

Juanma Barranquero's avatar
Juanma Barranquero committed
365 366 367
** The package linum.el is now included with Emacs.  It it a new minor
mode to display line numbers for the current buffer.

368 369 370 371 372
** proced.el has been added.  It operates on processes like dired.
Proced makes an Emacs buffer containing a listing of the current processes
(using ps(1)).  You can use the normal Emacs commands to move around in
this buffer, and special Proced commands to operate on the processes listed.

373 374

* Changes in Specialized Modes and Packages in Emacs 23.1
375

376 377 378 379
** A new `whitespace' package has been installed, and the pre-existing one
renamed to `old-whitespace'.
[FIXME someone explain why this is good, if it is...]

Glenn Morris's avatar
Glenn Morris committed
380 381
** In Change Log mode, the new function `change-log-find-file', bound to
C-c C-f, finds the file associated with the current log entry.
382

Stefan Monnier's avatar
Stefan Monnier committed
383 384 385 386 387 388 389 390 391
** 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:
392
    `:count', `:system', `:enable-function', `:case-fixed'.
Stefan Monnier's avatar
Stefan Monnier committed
393 394 395 396
*** Abbrev-tables have now the following special properties:
    `:parents', `:case-fixed', `:enable-function', `:regexp',
    `abbrev-table-modiff'.

397
** Help mode
Martin Rudalics's avatar
Martin Rudalics committed
398 399 400 401 402
*** 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
403
position of point in help window (for example in `view-lossage').
Martin Rudalics's avatar
Martin Rudalics committed
404 405

** view-remove-frame-by-deleting is now by default t
406
since users found iconification of view-mode frames distracting.
Martin Rudalics's avatar
Martin Rudalics committed
407

Juri Linkov's avatar
Juri Linkov committed
408 409 410 411 412 413
** 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
414 415 416 417
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).

418 419
This is enabled if isearch-buffers-multi is non-nil.

Glenn Morris's avatar
Glenn Morris committed
420 421 422
*** The part of an isearch that failed to match is highlighted in `isearch-fail'
face.

Stefan Monnier's avatar
Stefan Monnier committed
423 424 425
** 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
426 427 428 429 430 431
** 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
432 433 434
*** 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
435

Stefan Monnier's avatar
Stefan Monnier committed
436
** archive-mode has basic support to browse Rar archives.
Stefan Monnier's avatar
Stefan Monnier committed
437

438 439
** talk.el has been extended for multiple tty support.

440 441 442
** compilation-auto-jump-to-first-error tells `compile' to jump to
the first error encountered during compilations.

443
** In the `copyright' package, you can specify your copyright holders' names.
444 445 446
Only copyright lines with holders matching copyright-names-regexp will be
considered for update.

447 448 449
** eldoc highlights the function argument under point
with the face `eldoc-highlight-function-argument'.

Martin Rudalics's avatar
Martin Rudalics committed
450 451 452
** hide-ifdef-mode permits to shadow ifdef-blocks instead of hiding them.
See option `hide-ifdef-shadow' and function `hide-ifdef-toggle-shadowing'.

453
+++
Juanma Barranquero's avatar
Juanma Barranquero committed
454
** defcustom accepts new keyword arguments, `:safe' and `:risky', which
455 456
set a variable's `safe-local-variable' and `risky-local-variable' property.

457
** Etags changes
458 459 460 461 462
*** 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.

463
** VC
Dan Nicolaescu's avatar
Dan Nicolaescu committed
464 465
*** Clicking on the VC mode-line entry now pops the VC menu.

Dan Nicolaescu's avatar
Dan Nicolaescu committed
466
*** The VC mode-line entry now has a tooltip that explains the VC file status.
467

Dan Nicolaescu's avatar
Dan Nicolaescu committed
468 469
*** VC now supports applying VC operations to a set of files at a time.

Eric S. Raymond's avatar
Eric S. Raymond committed
470 471
This enables VC to work much more effectively with changeset-oriented
version-control systems such as Subversion, GNU Arch, Mercurial, and
Juanma Barranquero's avatar
Juanma Barranquero committed
472
Bzr.  VC will now pass a multiple-file commit to these systems
Eric S. Raymond's avatar
Eric S. Raymond committed
473 474
as a single changeset.

475 476
*** In VC Annotate mode, you can type V to toggle the annotation visibility.

477 478 479
*** In VC Annotate mode, you can type f to show the file revision on
the current line.

Dan Nicolaescu's avatar
Dan Nicolaescu committed
480 481
*** vc-git supports the "git grep" command.

482 483 484
** log-edit now has a command bound to C-c C-d to show the diff for
the files involved.

485 486
** sgml-electric-tag-pair-mode lets you simultaneously edit matched tag pairs.

Glenn Morris's avatar
Glenn Morris committed
487 488 489 490 491
** 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.

492
** BibTeX mode
Roland Winkler's avatar
Roland Winkler committed
493

Juanma Barranquero's avatar
Juanma Barranquero committed
494
*** New command `bibtex-initialize' (re)initializes BibTeX buffers.
Roland Winkler's avatar
Roland Winkler committed
495

Roland Winkler's avatar
Roland Winkler committed
496 497 498 499
*** 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
500
identify cited keys in BibTeX entries, used by `bibtex-find-crossref'.
Roland Winkler's avatar
Roland Winkler committed
501

Roland Winkler's avatar
Roland Winkler committed
502
*** Command `bibtex-url' allows multiple URLs per entry.
Roland Winkler's avatar
Roland Winkler committed
503

504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532
+++
** 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.

Glenn Morris's avatar
Glenn Morris committed
533 534
** Calendar and diary

535
+++
Glenn Morris's avatar
Glenn Morris committed
536 537 538 539 540
*** There is a new date style, `iso', essentially year/month/day.
The variable `european-calendar-style' is obsolete - use `calendar-date-style'.
Similarly, the commands `american-calendar' and `european-calendar'
should be replaced by `calendar-set-date-style'.

541 542
** Miscellaneous programming mode changes

Glenn Morris's avatar
Glenn Morris committed
543 544
*** 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
545

Glenn Morris's avatar
Glenn Morris committed
546 547 548 549 550
*** Python mode now has `pdbtrack' functionality.  When using pdb to
debug a Python program, pdbtrack notices the pdb prompt and displays
the source file and line that the program is stopped at, much the same
way as gud-mode does for debugging C programs with gdb.

551 552
*** The variable `fortran-line-length' can change the fixed-form line-length.

553 554 555
*** In Fortran mode, M-; is now bound to the standard comment-dwim,
rather than fortran-indent-comment.

556 557
+++
*** (The increasingly misnamed) F90 mode supports Fortran 2003 syntax.
558

Reiner Steib's avatar
Reiner Steib committed
559 560 561 562
** Gnus package

*** The Gnus package has been updated

563 564 565 566 567
*** In Emacs 23, Gnus uses Emacs' new internal coding system `utf-8-emacs' for
saving articles drafts and ~/.newsrc.eld.  These file may not be read
correctly in Emacs 22 and below.  If you want to Gnus across different Emacs
versions, you may set `mm-auto-save-coding-system' to `emacs-mule'.

Reiner Steib's avatar
Reiner Steib committed
568 569 570 571
*** 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.

572 573 574
** Miscellaneous

*** comint-mode uses `start-file-process' now (see Lisp Changes).
575 576 577
If `default-directory' is a remote file name, subprocesses are started
on the corresponding remote system.

578
*** C-x C-q in dired-mode now runs the command wdired-change-to-wdired-mode,
579 580
and C-x C-q in wdired-mode exits it with asking a question about
saving changes.
581

582 583
*** The new command `eshell/info' runs info in an eshell buffer.

Glenn Morris's avatar
Glenn Morris committed
584 585
*** The pcmpl-unix package supports hostname completion for ssh and scp.

Glenn Morris's avatar
Glenn Morris committed
586 587 588
*** WoMan tries to add locale-specific manual page directories to the
search path.  This can be disabled by setting `woman-locale' to nil.

Glenn Morris's avatar
Glenn Morris committed
589 590 591
*** The new variable `ffap-rfc-directories' specifies a list of local
directories in which `ffap-rfc' will first search for RFCs.

Glenn Morris's avatar
Glenn Morris committed
592
*** net-utils has an `iwconfig' command, similar to the existing `ifconfig'.
Dan Nicolaescu's avatar
Dan Nicolaescu committed
593
It is used to configure wireless interfaces.
Glenn Morris's avatar
Glenn Morris committed
594

595 596

* Changes in Emacs 23.1 on non-free operating systems
Juri Linkov's avatar
Juri Linkov committed
597

Jason Rumney's avatar
Jason Rumney committed
598 599 600
---
** IPv6 is supported on MS-Windows.
Emacs now supports IPv6 on Windows XP and later, and earlier versions
Juanma Barranquero's avatar
Juanma Barranquero committed
601
of Windows with third party IPv6 stacks installed.  Previously IPv6 was
Jason Rumney's avatar
Jason Rumney committed
602 603 604
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.

605
---
606 607 608 609
** Busy cursor (hourglass) now displays on MS-Windows.
When Emacs is busy, an hourglass mouse cursor is displayed on Windows.
Previously only X supported the busy cursor.

Jason Rumney's avatar
Jason Rumney committed
610 611 612 613 614 615 616 617 618 619
** 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
Juanma Barranquero's avatar
Juanma Barranquero committed
620
w32-pass-multimedia-buttons to nil.  See the doc string of that variable
Jason Rumney's avatar
Jason Rumney committed
621
for the list of extra keys that are available.
622 623

* Incompatible Lisp Changes in Emacs 23.1
624

625
+++
626 627 628 629
** The multibyteness of process filters is determined by the coding-system
used for decoding.  The functions `process-filter-multibyte-p' and
`set-process-filter-multibyte' are obsolete.

630 631 632 633 634 635 636 637 638
** The behavior of map-char-table has changed.  It may call the
specified function with a cons (FROM . TO) as a key if characters in
that range have the same value.

** The value of the function `charset-id' is now always 0.

** The functions `register-char-codings' and `coding-system-spec'
have been removed.

639 640 641
** The cpXXX coding systems are now supported automatically.  The
functions cp-...-codepage, which you had to use in Emacs 22 to enable
support for these coding systems, have been deleted.
642

643 644 645
+++
** The function `dired-call-process' has been removed.

646
** The variable `byte-compile-warnings' can now be a list starting with `not',
Juanma Barranquero's avatar
Juanma Barranquero committed
647
meaning to disable the specified warnings.  The meaning of this list
648
may therefore be the reverse of what you expect (of course, this is
Juanma Barranquero's avatar
Juanma Barranquero committed
649
only an issue if you make use of the new `not' syntax).  Rather than
650 651 652 653
checking/manipulating elements directly, use the new functions
`byte-compile-warning-enabled-p', `byte-compile-disable-warning', and
`byte-compile-enable-warning.'

654 655 656
** `mode-name' is no longer guaranteed to be a string.
Use `(format-mode-line mode-name)' to ensure a string value.

Glenn Morris's avatar
Glenn Morris committed
657 658 659 660 661 662 663 664 665 666 667 668 669 670 671
** The following features have been removed.  They were used for
displaying various scripts with specific fonts, and are no longer
needed now that OpenType font support is available:

*** `devanagari' and `devan-util', and all associated devanagari-* and
dev-* functions and variables (formerly used for Devanagari script).

*** `kannada' and `knd-util', and all associated kannada-* and knd-*
functions and variables (formerly used for Kannada script).

*** `malayalam' and `mlm-util', and all associated malayalam-* and
mlm-* functions and variables (formerly used for Malayalam script).

*** `tamil' and `tml-util, and all associated tamil-* and tml-*
functions and variables (formerly used for Tamil script).
672

673 674

* Lisp Changes in Emacs 23.1
Juri Linkov's avatar
Juri Linkov committed
675

676 677
** When deleting a terminal, run the special hook `delete-terminal-functions'.

678 679 680 681
** The `read-shell-command' function does what its name says, with completion.
It uses the minibuffer-local-shell-command-map for that.

** The `buffer-swap-text' function can swap the text between two buffers.
682 683
This can be useful for modes such as tar-mode, archive-mode, RMAIL.

684 685
** `clear-image-cache' can be told to flush only images of a specific file.

686
** clone-indirect-buffer now runs the clone-indirect-buffer-hook.
687

688
** `beginning-of-defun-function' now takes one argument, the count
689
 given to `beginning-of-defun'.
690

691 692 693
** The variable `inhibit-changing-match-data', if non-nil, prevents the
search and match primitives from changing the match data.

694 695 696 697
+++
** New function `match-substitute-replacement' returns the result of
`replace-match' without actually using it in the buffer.

698 699 700 701 702
** 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.

703 704 705 706 707 708 709
+++
** 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.

710 711 712
** `custom-note-var-changed' tells Custom to treat the change in a certain
variable as having been made within Custom.

713 714
** `frame-inherited-parameters' lets new frames inherit parameters from
the selected frame.
715

716
** Commands should use `use-region-p' to test whether there is
717 718
an active region that they should operate on.

719 720 721 722 723
** `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'.

724 725 726 727 728
** 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.

729 730 731 732 733
** 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).

734 735
** The new function `read-color' reads a color name using the minibuffer.

736 737 738 739
** `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.

740 741
** Character code, representation, and charset changes.

Juanma Barranquero's avatar
Juanma Barranquero committed
742
The character code space is now 0x0..0x3FFFFF with no gap.
743 744 745
Characters of code 0x0..0x10FFFF are Unicode characters of the same code points.
Characters of code 0x3FFF80..0x3FFFFF are raw 8-bit bytes.

Juanma Barranquero's avatar
Juanma Barranquero committed
746
Generic characters no longer exist.
747 748 749 750 751 752 753 754 755

In buffer and string, characters are represented by UTF-8 byte
sequence in a multibyte buffer/string.

The concept of a charset has changed.  A single character may belong to
multiple charsets (e.g. a-grave, U+00E0, belongs to charsets unicode,
iso-8859-1, iso-8859-3, etc).

*** The new function `characterp' returns t if and only if the argument
Glenn Morris's avatar
Glenn Morris committed
756
is a character.  This replaces `char-valid-p', which is now obsolete.
757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807

*** The new function `max-char' returns the maximum character code
(currently it is #x3FFFFF).

*** The functions `encode-char' and `decode-char' now accept any character sets.

*** The function `define-charset' now accepts a completely different
form of arguments (old-style arguments still work).

*** The new function `define-charset-alias' defines an alias of a charset.

*** The value of the function `char-charset' depends on the current
priorities of charsets.

*** The new function `charset-priority-list' returns the list of
charsets ordered by priority.

*** The new function `set-charset-priority' sets priorities of charsets.

*** The new function `unibyte-string' make a unibyte string from bytes.

*** The new function `define-char-code-property' defines a character
code property.

*** The new function `char-code-property-description' returns the
description string of a character code property.

*** The function get-char-code-property now accepts many Unicode base
character properties.  They are `name', `general-category',
`canonical-combining-class', `bidi-class', `decomposition',
`decimal-digit-value', `digit-value', `numeric-value', `mirrored',
`old-name', `iso-10646-comment', `uppercase', `lowercase', and
`titlecase'.

*** The new variable `find-word-boundary-function-table' is a
char-table of functions to search for a word boundary.

*** The new variable `char-script-table' is a char-table of script names.

*** The new variable `char-width-table' is a char-table of character widths.

*** The new variable `print-charset-text-property' controls how to
handle `charset' text property on printing a string.

*** The new variable `printable-chars' is a char-table defining if a
character is printable or not.

*** The functions `modify-syntax-entry' and `modify-category-entry' now
accepts a cons of characters as the first argument, and modify all
entries in that range of characters.

808
** Code conversion changes
809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841

*** The new function `define-coding-system' should be used to define a
coding system instead of `make-coding-system' (which is now obsolete).

*** The functions `encode-coding-region' and `decode-coding-region'
have an optional 4th argument to specify where the result of
conversion should go.

*** The functions `encode-coding-string' and `decode-coding-string'
have an optional 4th argument specifying a buffer to store the result
of conversion.

*** The new function `with-coding-priority' executes the body part with
the specified coding system priority order.

*** The new function `check-coding-systems-region' checks if the text
in the region is encodable by the specified coding systems.

*** The new function `coding-system-aliases' returns a list of aliases
of a coding system.

*** The new function `coding-system-charset-list' returns a list of
charsets supported by a coding system.

*** The new function `coding-system-priority-list' returns a list of
coding systems ordered by their priorities.

*** The new function `set-coding-system-priority' sets priorities of
coding systems.

*** The functions `set-coding-priority' and `make-coding-system' are obsolete.

** There is a new input method, Robin, different from Quail.
Juanma Barranquero's avatar
Juanma Barranquero committed
842
It has three functionalities:
843 844 845 846 847 848 849 850 851 852 853 854
 i) a simple input method (converts an ASCII sequence into a string).
ii) converts an existing buffer substring into another string
iii) reverse conversion (each character produced by a
robin rule can hold the original ASCII sequence as a char-code-property)

*** The new function `robin-define-package' defines a Robin package.

*** The new function `robin-modify-package' modifies an existing Robin package.

*** The new function `robin-use-package' starts using a Robin package
as an input method.

855
** Changes related to the new font backend
856

857 858
Which font backends to use can be specified by the X resource "FontBackend".
For instance, to use both X core fonts and Xft fonts:
859

860
Emacs.FontBackend: x,xft
861

862 863
If this resource is not set, Emacs tries to use all font backends
available on your graphic device.
864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894

*** New frame parameter `font-backend' specifies a list of
font-backends supported by the frame's graphic device.  On X, they are
currently `x' and `xft'.

*** New function `fontp' checks if the argument is a font-spec or font-entity.

*** New function `font-spec' creates a new font-spec object.

*** New function `font-get' returns a font property value.

*** New function `font-put' sets a font property value.

*** New function `list-fonts' returns a list of font-entities matching
the given specification.

*** New function `list-families' returns a list of family names of
available fonts.

*** New function `font-font' returns a font-entity best matching with
the given specification.

*** New function `font-xlfd-name' returns an XLFD name of a given font
(font-spec, font-entity, or font-object).

*** New function `clear-font-cache' clears all font caches.

*** The function `set-fontset-font' now accepts a script name as the
second argument, and has an optional 5th argument to control how to
set the font.

895
** Changes related to multiple tty support
896

Stefan Monnier's avatar
Stefan Monnier committed
897 898 899
*** $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.

900 901
*** $DISPLAY is now dynamically inherited from the frame's `display'.

Juanma Barranquero's avatar
Juanma Barranquero committed
902
*** The `window-system' variable has been made frame-local.  The new
903 904 905 906 907 908 909 910 911 912 913 914
`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.

915
*** New functions: `delete-tty', `suspend-tty', `resume-tty'.
916

Stefan Monnier's avatar
Stefan Monnier committed
917 918
*** A new data type for terminals with functions: `get-device-terminal',
`terminal-parameters', `terminal-parameter', `set-terminal-parameter'.
919

920
*** New hooks: `suspend-tty-functions' and `resume-tty-functions'
921
are called after a tty frame has been suspended or resumed,
Juanma Barranquero's avatar
Juanma Barranquero committed
922
respectively.  The functions are called with the terminal id of the frame
923 924
being suspended/resumed as a parameter.

Stefan Monnier's avatar
Stefan Monnier committed
925
*** New function: `environment'.
926

927
*** New variable: `local-function-key-map'.
Stefan Monnier's avatar
Stefan Monnier committed
928 929 930 931
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.
932

Stefan Monnier's avatar
Stefan Monnier committed
933 934
*** `initial-environment' holds the environment inherited from Emacs's parent.

935 936 937
*** The `keyboard-translate-table' variable and the terminal and
keyboard coding systems have been made terminal-local.

938 939
*** In addition to the global function-key-map, Emacs has terminal-local
local-function-key-map variables, and uses them instead of the
940 941 942 943
global keymaps to set up translations and function key sequences
relevant to a specific terminal device.


944 945 946 947
** 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).
948

949 950
** Non-breaking space now acts as whitespace.

951
+++
952 953 954 955 956 957 958 959 960
** 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
961 962 963
** The `require-match' argument to `completing-read' accepts a new value
`confirm-only'.

964 965 966
+++
** The regexp form \(?<num>:<regexp>\) specifies the group number explicitly.

967 968 969 970 971 972 973 974 975 976
** 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
977 978 979 980
+++
** New variable `user-emacs-directory'.
Use this instead of "~/.emacs.d".

981
+++
Juanma Barranquero's avatar
Juanma Barranquero committed
982
** The new function `start-file-process' is similar to `start-process',
983
but obeys file handlers.  The file handler is chosen based on
984 985
`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
986
`start-file-process' and `process-file', respectively.
987

988 989 990
** The new function `process-lines' executes an external program and
returns its output as a list of lines.

991
+++
992 993 994 995
** `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.
996

997 998 999
** 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.
1000 1001 1002 1003

** 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.
1004

1005
* New Packages for Lisp Programming in Emacs 23.1
1006

1007 1008 1009 1010 1011 1012
** 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
1013 1014
** The new package avl-tree.el deals with the AVL tree data structure.

1015

Dave Love's avatar
#  
Dave Love committed
1016
----------------------------------------------------------------------
1017
This file is part of GNU Emacs.
Dave Love's avatar
#  
Dave Love committed
1018

1019 1020
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
1021
the Free Software Foundation; either version 3, or (at your option)
1022 1023 1024 1025 1026 1027
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
1028

1029 1030 1031 1032
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
1033

1034

Dave Love's avatar
#  
Dave Love committed
1035 1036 1037 1038
Local variables:
mode: outline
paragraph-separate: "[ 	]*$"
end:
Miles Bader's avatar
Miles Bader committed
1039

Miles Bader's avatar
Miles Bader committed
1040
arch-tag: e759449d-88b3-4de4-9900-3a6c3dfa23e2