NEWS 39.7 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 69
** Minibuffer input of shell commands now comes with completion.

70 71 72 73
** 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.

74
** Emacs now supports using both X displays and ttys in one session.
Dan Nicolaescu's avatar
Dan Nicolaescu committed
75 76 77 78
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.
79 80 81 82

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
83
** The Emacs character set is now a superset of Unicode.
84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112
(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.

113 114
** There are new Chinese-GBK, Chinese-GB18030, Khmer, Bengali,
Punjabi, Gujarati, Oriya, Telugu, Sinhala, and TaiViet language
115 116
environments.

Jan Djärv's avatar
Jan Djärv committed
117 118 119 120 121 122
** 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
123 124 125
** 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
126

127 128 129 130 131 132 133
** 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.

134 135 136
** split-window-preferred-function specifies whether display-buffer should
split windows vertically or horizontally.

137 138 139 140 141
** 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.

142 143
** The refcards are now shipped as PDF files.

144 145
** Emacs now supports the SVG image format through librsvg2.

146 147
** Transient Mark Mode is now on by default.

148 149
** C-SPC C-SPC in transient-mark-mode pushes a mark without activating it.

150
** If you set find-file-confirm-nonexistent-file to t, then C-x C-f
Stefan Monnier's avatar
Stefan Monnier committed
151 152
requires confirmation before opening a non-existent file.

Nick Roberts's avatar
Nick Roberts committed
153 154 155 156 157
** 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.

158 159 160 161
** 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
162 163 164
** New command recenter-top-bottom moves the current line to window
center, top and bottom on successive invokations.

165 166
** C-l is bound to the new command recenter-top-bottom, rather than recenter.

Juanma Barranquero's avatar
Juanma Barranquero committed
167
** The mode-line displays a `@' if the default-directory for the current buffer
Nick Roberts's avatar
Nick Roberts committed
168
is on a remote machine, or a hyphen otherwise.
169

170 171 172
** 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
173
** The new command balance-windows-area balances windows both vertically
174
and horizontally.
175 176 177

** 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.
178 179 180

** 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
181
This is because some file name handlers (like ange-ftp) are not able to
182
run processes remotely.
183 184 185

** The new command `display-time-world' starts an updating time display
using several time zones, in a buffer.
186

Glenn Morris's avatar
Glenn Morris committed
187 188 189
** 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
190 191
** The new variables `before-init-time' and `after-init-time' record the
value of `current-time' before and after Emacs loads the init files.
192 193 194

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

195 196 197
** The new function `emacs-init-time' returns the duration of the
Emacs initialization.

198 199 200
** The minor modes unify-8859-on-encoding-mode, unify-8859-on-decoding-mode
are obsolete.

201

202
* Startup Changes in Emacs 23.1
203

204 205 206 207 208 209
** 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.

210 211 212 213
** New user option `initial-buffer-choice' specifies what to display
after starting Emacs: startup screen, *scratch* buffer, visiting a
file or directory.

214 215 216 217
** 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.
218

219
** The new command-line option `--disable-font-backend' disables the
220 221
new font backend code at runtime.  This option is not available if
Emacs was compiled without font-backend support.
222

223
** The abbrev file is no longer read at startup in batch mode.
224

225
* Incompatible Editing Changes in Emacs 23.1
Kim F. Storm's avatar
Kim F. Storm committed
226

227 228 229 230 231
+++
** 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
232

233
* Editing Changes in Emacs 23.1
Richard M. Stallman's avatar
Richard M. Stallman committed
234

235 236 237 238 239
+++
** 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'.

240 241 242
+++
** 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
243
paragraph.
244

Juri Linkov's avatar
Juri Linkov committed
245
+++
Juri Linkov's avatar
Juri Linkov committed
246 247 248 249
** 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.

250 251 252
** TAB now indents the region if the region is active and
`transient-mark-mode' is turned on.

253 254 255
** `use-empty-active-region' controls whether an empty active region
in Transient Mark mode should make commands operate on that empty region.

256 257 258
** C-z now invokes `suspend-frame', C-x C-c now invokes
`save-buffers-kill-terminal'.

259 260
** New command kill-matching-buffers kills buffers whose name matches a regexp.

261 262 263 264 265 266 267
** 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.
268

269 270 271 272
** 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.

273
** Minibuffer changes
274

275 276 277 278
*** Many commands that read a buffer name now provide a list of all buffers
sorted by recency in the list of minibuffer default values available
via M-n or down-arrow.  It is also possible to search this buffer list
in the minibuffer using incremental search commands C-s and C-M-s
279 280
(for instance, `C-x b C-s substr RET RET' to select a buffer by part
of the buffer name).
281

282 283 284
*** In C-x d, if you type M-n you get the visited file name of the
current buffer.

285 286 287 288 289 290 291 292
*** 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.

293 294 295 296 297 298 299 300
*** 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.

301 302 303 304 305 306 307 308 309 310
** 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.

311 312

* New Modes and Packages in Emacs 23.1
313

314
** FIXME add details of new packages imported from lisp/gnus.
315
[Maybe some information from doc/misc/gnus-coding.texi can be reused]
316

317 318 319 320 321 322
** 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.

323 324 325 326 327 328 329 330 331 332 333
** 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
334

335 336
** 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
337

Kim F. Storm's avatar
Kim F. Storm committed
338
** minibuffer-indicate-depth-mode shows the minibuffer depth in the prompt.
339

Michael Olson's avatar
Michael Olson committed
340 341 342 343 344
** 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
345 346 347 348
** 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
349

Michael Olson's avatar
Michael Olson committed
350 351 352 353
** 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.
354

355 356 357 358
** 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.

359 360 361 362
** 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
363 364 365
** The package linum.el is now included with Emacs.  It it a new minor
mode to display line numbers for the current buffer.

366 367

* Changes in Specialized Modes and Packages in Emacs 23.1
368

369 370 371 372
** 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
373 374
** 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.
375

Stefan Monnier's avatar
Stefan Monnier committed
376 377 378 379 380 381 382 383 384
** 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:
385
    `:count', `:system', `:enable-function', `:case-fixed'.
Stefan Monnier's avatar
Stefan Monnier committed
386 387 388 389
*** Abbrev-tables have now the following special properties:
    `:parents', `:case-fixed', `:enable-function', `:regexp',
    `abbrev-table-modiff'.

390
** Help mode
Martin Rudalics's avatar
Martin Rudalics committed
391 392 393 394 395
*** 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
396
position of point in help window (for example in `view-lossage').
Martin Rudalics's avatar
Martin Rudalics committed
397 398

** view-remove-frame-by-deleting is now by default t
399
since users found iconification of view-mode frames distracting.
Martin Rudalics's avatar
Martin Rudalics committed
400

Juri Linkov's avatar
Juri Linkov committed
401 402 403 404 405 406
** 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
407 408 409 410
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).

411 412
This is enabled if isearch-buffers-multi is non-nil.

Glenn Morris's avatar
Glenn Morris committed
413 414 415
*** The part of an isearch that failed to match is highlighted in `isearch-fail'
face.

Stefan Monnier's avatar
Stefan Monnier committed
416 417 418
** 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
419 420 421 422 423 424
** 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
425 426 427
*** 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
428

Stefan Monnier's avatar
Stefan Monnier committed
429
** archive-mode has basic support to browse Rar archives.
Stefan Monnier's avatar
Stefan Monnier committed
430

431 432
** talk.el has been extended for multiple tty support.

433 434 435
** compilation-auto-jump-to-first-error tells `compile' to jump to
the first error encountered during compilations.

436
** In the `copyright' package, you can specify your copyright holders' names.
437 438 439
Only copyright lines with holders matching copyright-names-regexp will be
considered for update.

440 441 442
** eldoc highlights the function argument under point
with the face `eldoc-highlight-function-argument'.

Martin Rudalics's avatar
Martin Rudalics committed
443 444 445
** hide-ifdef-mode permits to shadow ifdef-blocks instead of hiding them.
See option `hide-ifdef-shadow' and function `hide-ifdef-toggle-shadowing'.

446
+++
Juanma Barranquero's avatar
Juanma Barranquero committed
447
** defcustom accepts new keyword arguments, `:safe' and `:risky', which
448 449
set a variable's `safe-local-variable' and `risky-local-variable' property.

450
** Etags changes
451 452 453 454 455
*** 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.

456
** VC
Dan Nicolaescu's avatar
Dan Nicolaescu committed
457 458
*** Clicking on the VC mode-line entry now pops the VC menu.

Dan Nicolaescu's avatar
Dan Nicolaescu committed
459
*** The VC mode-line entry now has a tooltip that explains the VC file status.
460

Dan Nicolaescu's avatar
Dan Nicolaescu committed
461 462
*** VC now supports applying VC operations to a set of files at a time.

Eric S. Raymond's avatar
Eric S. Raymond committed
463 464
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
465
Bzr.  VC will now pass a multiple-file commit to these systems
Eric S. Raymond's avatar
Eric S. Raymond committed
466 467
as a single changeset.

468 469
*** In VC Annotate mode, you can type V to toggle the annotation visibility.

470 471 472
*** In VC Annotate mode, you can type f to show the file revision on
the current line.

Dan Nicolaescu's avatar
Dan Nicolaescu committed
473 474
*** vc-git supports the "git grep" command.

475 476 477
** log-edit now has a command bound to C-c C-d to show the diff for
the files involved.

478 479
** sgml-electric-tag-pair-mode lets you simultaneously edit matched tag pairs.

Glenn Morris's avatar
Glenn Morris committed
480 481 482 483 484
** 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.

485
** BibTeX mode
Roland Winkler's avatar
Roland Winkler committed
486

Juanma Barranquero's avatar
Juanma Barranquero committed
487
*** New command `bibtex-initialize' (re)initializes BibTeX buffers.
Roland Winkler's avatar
Roland Winkler committed
488

Roland Winkler's avatar
Roland Winkler committed
489 490 491 492
*** 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
493
identify cited keys in BibTeX entries, used by `bibtex-find-crossref'.
Roland Winkler's avatar
Roland Winkler committed
494

Roland Winkler's avatar
Roland Winkler committed
495
*** Command `bibtex-url' allows multiple URLs per entry.
Roland Winkler's avatar
Roland Winkler committed
496

497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525
+++
** 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.

526 527
** Miscellaneous programming mode changes

Glenn Morris's avatar
Glenn Morris committed
528 529
*** 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
530

Glenn Morris's avatar
Glenn Morris committed
531 532 533 534 535
*** 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.

536 537
*** The variable `fortran-line-length' can change the fixed-form line-length.

538 539 540
*** In Fortran mode, M-; is now bound to the standard comment-dwim,
rather than fortran-indent-comment.

541 542
+++
*** (The increasingly misnamed) F90 mode supports Fortran 2003 syntax.
543

Reiner Steib's avatar
Reiner Steib committed
544 545 546 547
** Gnus package

*** The Gnus package has been updated

548 549 550 551 552
*** 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
553 554 555 556
*** 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.

557 558 559
** Miscellaneous

*** comint-mode uses `start-file-process' now (see Lisp Changes).
560 561 562
If `default-directory' is a remote file name, subprocesses are started
on the corresponding remote system.

563
*** C-x C-q in dired-mode now runs the command wdired-change-to-wdired-mode,
564 565
and C-x C-q in wdired-mode exits it with asking a question about
saving changes.
566

567 568
*** The new command `eshell/info' runs info in an eshell buffer.

Glenn Morris's avatar
Glenn Morris committed
569 570
*** The pcmpl-unix package supports hostname completion for ssh and scp.

Glenn Morris's avatar
Glenn Morris committed
571 572 573
*** 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
574 575 576
*** 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
577
*** net-utils has an `iwconfig' command, similar to the existing `ifconfig'.
Dan Nicolaescu's avatar
Dan Nicolaescu committed
578
It is used to configure wireless interfaces.
Glenn Morris's avatar
Glenn Morris committed
579

580 581

* Changes in Emacs 23.1 on non-free operating systems
Juri Linkov's avatar
Juri Linkov committed
582

Jason Rumney's avatar
Jason Rumney committed
583 584 585
---
** 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
586
of Windows with third party IPv6 stacks installed.  Previously IPv6 was
Jason Rumney's avatar
Jason Rumney committed
587 588 589
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
590 591 592 593 594 595 596 597 598 599
** 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
600
w32-pass-multimedia-buttons to nil.  See the doc string of that variable
Jason Rumney's avatar
Jason Rumney committed
601
for the list of extra keys that are available.
602 603

* Incompatible Lisp Changes in Emacs 23.1
604

605 606 607 608
** 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.

609 610 611 612 613 614 615 616 617
** 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.

618 619 620
** 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.
621

622 623 624
+++
** The function `dired-call-process' has been removed.

625
** The variable `byte-compile-warnings' can now be a list starting with `not',
Juanma Barranquero's avatar
Juanma Barranquero committed
626
meaning to disable the specified warnings.  The meaning of this list
627
may therefore be the reverse of what you expect (of course, this is
Juanma Barranquero's avatar
Juanma Barranquero committed
628
only an issue if you make use of the new `not' syntax).  Rather than
629 630 631 632
checking/manipulating elements directly, use the new functions
`byte-compile-warning-enabled-p', `byte-compile-disable-warning', and
`byte-compile-enable-warning.'

633 634 635
** `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
636 637 638 639 640 641 642 643 644 645 646 647 648 649 650
** 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).
651

652 653

* Lisp Changes in Emacs 23.1
Juri Linkov's avatar
Juri Linkov committed
654

655 656 657 658
** 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.
659 660
This can be useful for modes such as tar-mode, archive-mode, RMAIL.

661 662
** `clear-image-cache' can be told to flush only images of a specific file.

663
** clone-indirect-buffer now runs the clone-indirect-buffer-hook.
664

665
** `beginning-of-defun-function' now takes one argument, the count
666
 given to `beginning-of-defun'.
667

668 669 670
** The variable `inhibit-changing-match-data', if non-nil, prevents the
search and match primitives from changing the match data.

671 672 673 674
+++
** New function `match-substitute-replacement' returns the result of
`replace-match' without actually using it in the buffer.

675 676 677 678 679
** 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.

680 681 682 683 684 685 686
+++
** 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.

687 688 689
** `custom-note-var-changed' tells Custom to treat the change in a certain
variable as having been made within Custom.

690 691
** `frame-inherited-parameters' lets new frames inherit parameters from
the selected frame.
692

693
** Commands should use `use-region-p' to test whether there is
694 695
an active region that they should operate on.

696 697 698 699 700
** `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'.

701 702 703 704 705
** 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.

706 707 708 709 710
** 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).

711 712
** The new function `read-color' reads a color name using the minibuffer.

713 714 715 716
** `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.

717 718
** Character code, representation, and charset changes.

Juanma Barranquero's avatar
Juanma Barranquero committed
719
The character code space is now 0x0..0x3FFFFF with no gap.
720 721 722
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
723
Generic characters no longer exist.
724 725 726 727 728 729 730 731 732

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
733
is a character.  This replaces `char-valid-p', which is now obsolete.
734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790

*** 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-charset' returns the current unibyte
charset.  The unibyte charset determines how unibyte/multibyte
conversion is done.

*** The new function `set-unibyte-charset' sets the unibyte charset.

*** 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.

791
** Code conversion changes
792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824

*** 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
825
It has three functionalities:
826 827 828 829 830 831 832 833 834 835 836 837
 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.

838
** Changes related to the new font backend
839

840 841
Which font backends to use can be specified by the X resource "FontBackend".
For instance, to use both X core fonts and Xft fonts:
842

843
Emacs.FontBackend: x,xft
844

845 846
If this resource is not set, Emacs tries to use all font backends
available on your graphic device.
847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877

*** 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.

878
** Changes related to multiple tty support
879

Stefan Monnier's avatar
Stefan Monnier committed
880 881 882
*** $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.

883 884
*** $DISPLAY is now dynamically inherited from the frame's `display'.

Juanma Barranquero's avatar
Juanma Barranquero committed
885
*** The `window-system' variable has been made frame-local.  The new
886 887 888 889 890 891 892 893 894 895 896 897
`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.

898
*** New functions: `delete-tty', `suspend-tty', `resume-tty'.
899

Stefan Monnier's avatar
Stefan Monnier committed
900 901
*** A new data type for terminals with functions: `get-device-terminal',
`terminal-parameters', `terminal-parameter', `set-terminal-parameter'.
902

903
*** New hooks: `suspend-tty-functions' and `resume-tty-functions'
904
are called after a tty frame has been suspended or resumed,
Juanma Barranquero's avatar
Juanma Barranquero committed
905
respectively.  The functions are called with the terminal id of the frame
906 907
being suspended/resumed as a parameter.

Stefan Monnier's avatar
Stefan Monnier committed
908
*** New function: `environment'.
909

910
*** New variable: `local-function-key-map'.
Stefan Monnier's avatar
Stefan Monnier committed
911 912 913 914
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.
915

Stefan Monnier's avatar
Stefan Monnier committed
916 917
*** `initial-environment' holds the environment inherited from Emacs's parent.

918 919 920
*** The `keyboard-translate-table' variable and the terminal and
keyboard coding systems have been made terminal-local.

921 922
*** In addition to the global function-key-map, Emacs has terminal-local
local-function-key-map variables, and uses them instead of the
923 924 925 926
global keymaps to set up translations and function key sequences
relevant to a specific terminal device.


927 928 929 930
** 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).
931

932 933
** Non-breaking space now acts as whitespace.

934
+++
935 936 937 938 939 940 941 942 943
** 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
944 945 946
** The `require-match' argument to `completing-read' accepts a new value
`confirm-only'.

947 948 949
+++
** The regexp form \(?<num>:<regexp>\) specifies the group number explicitly.

950 951 952 953 954 955 956 957 958 959
** 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
960 961 962 963
+++
** New variable `user-emacs-directory'.
Use this instead of "~/.emacs.d".

964
+++
Juanma Barranquero's avatar
Juanma Barranquero committed
965
** The new function `start-file-process' is similar to `start-process',
966
but obeys file handlers.  The file handler is chosen based on
967 968
`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
969
`start-file-process' and `process-file', respectively.
970

971 972 973
** The new function `process-lines' executes an external program and
returns its output as a list of lines.

974
+++
975 976 977 978
** `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.
979

980 981 982
** 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.
983 984 985 986

** 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.
987

988
* New Packages for Lisp Programming in Emacs 23.1
989

990 991 992 993 994 995
** 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
996 997
** The new package avl-tree.el deals with the AVL tree data structure.

998

Dave Love's avatar
#  
Dave Love committed
999
----------------------------------------------------------------------
1000
This file is part of GNU Emacs.
Dave Love's avatar
#  
Dave Love committed
1001

1002 1003
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
1004
the Free Software Foundation; either version 3, or (at your option)
1005 1006 1007 1008 1009 1010
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
1011

1012 1013 1014 1015
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
1016

1017

Dave Love's avatar
#  
Dave Love committed
1018 1019 1020 1021
Local variables:
mode: outline
paragraph-separate: "[ 	]*$"
end:
Miles Bader's avatar
Miles Bader committed
1022

Miles Bader's avatar
Miles Bader committed
1023
arch-tag: e759449d-88b3-4de4-9900-3a6c3dfa23e2