NEWS 50.3 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
** The default X toolkit is now Gtk+, rather than Lucid.
Chong Yidong's avatar
Chong Yidong committed
30 31
The configure option `--with-gtk' has been removed.  Gtk is now the
default toolkit, but you can use --with-x-toolkit=gtk if necessary.
32

Chong Yidong's avatar
Chong Yidong committed
33 34 35
** New font code.
Fonts are handled by new code capable of dealing with multiple font
backends.  This requires the freetype and fontconfig libraries
36

Chong Yidong's avatar
Chong Yidong committed
37 38
*** Emacs now accepts font names supplied in the fontconfig format
(e.g. "monospace-12:bold") and GTK format (e.g. "Monospace Bold 12").
Dan Nicolaescu's avatar
Dan Nicolaescu committed
39

Chong Yidong's avatar
Chong Yidong committed
40 41 42 43 44 45 46 47 48
*** Added support for local fonts (fonts installed on the machine
where Emacs is running).

*** Added support for the Xft library for antialiasing.

*** Added support for the otf library for complex text layout by
OpenType fonts.

*** Added support for the m17n library for text shaping.
49

Chong Yidong's avatar
Chong Yidong committed
50 51 52
** Changes to image support

*** configure now checks for libgif before libungif when searching for
53
a GIF library.
Glenn Morris's avatar
Glenn Morris committed
54

Chong Yidong's avatar
Chong Yidong committed
55 56 57 58
*** Emacs now supports the SVG image format through librsvg2.

** The Mac Carbon port is no longer supported.
Instead, use... [FIXME what?]
Glenn Morris's avatar
Glenn Morris committed
59

Chong Yidong's avatar
Chong Yidong committed
60 61
** The new configuration option "--with-dbus" enables D-Bus language
bindings for Emacs.
62

63 64 65
** Support for many obsolete platforms has been removed.
See the list at the end of etc/MACHINES for details.

Chong Yidong's avatar
Chong Yidong committed
66 67 68 69
*** Support for systems without alloca has been removed.

*** Support for Sun windows has been removed.

Glenn Morris's avatar
Glenn Morris committed
70 71
** The `emacstool' utility has been removed.

72 73 74 75
** 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.

Chong Yidong's avatar
Chong Yidong committed
76 77 78 79 80
** The refcards are now shipped as PDF files.

** Emacs 23 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.
Nick Roberts's avatar
Nick Roberts committed
81 82 83

* Changes in Emacs 23.1

Chong Yidong's avatar
Chong Yidong committed
84
** Improved X Window System support
85

Chong Yidong's avatar
Chong Yidong committed
86 87 88 89 90
*** Emacs now supports using both X displays and ttys in one session.
With an Emacs server active (M-x server-start), `emacsclient -t'
creates a tty frame connected to the running emacs server.  You can
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).
91 92 93 94

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

Chong Yidong's avatar
Chong Yidong committed
95 96 97 98
**** Emacsclient can now open new terminal frames.
Now, the default behavior is 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.
99

Chong Yidong's avatar
Chong Yidong committed
100 101
*** The new command close-display-connection closes a connection to a
remote display.
102

Chong Yidong's avatar
Chong Yidong committed
103 104 105
*** 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
Jan Djärv's avatar
Jan Djärv committed
106 107 108
http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
for details about XEmbed.

Chong Yidong's avatar
Chong Yidong committed
109 110 111 112
*** Emacs can now set the frame opacity.
The opacity of a frame can be controlled by setting the `alpha' frame
parameter.  This only takes effect on a compositing window manager for
the X Window System, such as Compiz, Beryl and Compiz Fusion.
113 114

The alpha parameter should be an integer between 0 (transparent) and
Chong Yidong's avatar
Chong Yidong committed
115 116 117
100 (opaque), or a float number between 0.0 and 1.0.  It can also be a
cons cell (ACTIVE . INACTIVE), where ACTIVE is the opacity of an
active frame and INACTIVE is the opactity of non-active frames.
118

Chong Yidong's avatar
Chong Yidong committed
119 120
The variable `frame-alpha-lower-limit' defines a lower bound for the
opacity; the default is 20.
121

Chong Yidong's avatar
Chong Yidong committed
122
** Internationalization changes
123

Chong Yidong's avatar
Chong Yidong committed
124 125
*** The Emacs character set is now a superset of Unicode.
(It has about four times the code space, which should be plenty).
Stefan Monnier's avatar
Stefan Monnier committed
126

Chong Yidong's avatar
Chong Yidong committed
127 128 129 130
The internal encoding used for buffers and strings is now
Unicode-based and called `utf-8-emacs'.  This encoding is backwards
compatible with Unicode's UTF-8 encoding.  The internal encoding
previously used by Emacs, `emacs-mule', is still available.
Nick Roberts's avatar
Nick Roberts committed
131

Chong Yidong's avatar
Chong Yidong committed
132 133 134 135 136 137 138
During byte-compilation, Emacs 23 uses `utf-8-emacs' to write files.
As a result, byte-compiled files containing non-ASCII characters 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).  This takes somewhat more time, so it may be
worth recompiling existing .elc files which don't need to be shared
with older Emacsen.
139

Chong Yidong's avatar
Chong Yidong committed
140
*** There are new coding systems/aliases; see M-x list-coding-systems.
141

Chong Yidong's avatar
Chong Yidong committed
142 143 144
*** 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.
Dan Nicolaescu's avatar
Dan Nicolaescu committed
145

Chong Yidong's avatar
Chong Yidong committed
146 147
**** 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.
148

Chong Yidong's avatar
Chong Yidong committed
149 150
**** A dynamic charset priority list is used to infer the charset of
characters for display.
151

Chong Yidong's avatar
Chong Yidong committed
152 153 154
*** There are new language environments for Chinese-GBK,
Chinese-GB18030, Khmer, Bengali, Punjabi, Gujarati, Oriya, Telugu,
Sinhala, and TaiViet.
155

Chong Yidong's avatar
Chong Yidong committed
156 157
*** The minor modes unify-8859-on-encoding-mode and
unify-8859-on-decoding-mode are obsolete.
158

Chong Yidong's avatar
Chong Yidong committed
159 160 161 162 163
** Emacs now supports serial port access on GNU/Linux, Unix, and
Windows.  `serial-term' starts an interactive terminal,
`make-serial-process' and `serial-process-configure' provide a Lisp
interface.  The serial port can be configured at runtime with the
mode-line mouse menu.
164

Chong Yidong's avatar
Chong Yidong committed
165
** Menu Bar changes
166

Chong Yidong's avatar
Chong Yidong committed
167 168 169 170 171
*** In the Options menu, the "Set Default Font" item applies the
selected font to the `default' face on all frames, not just the
current frame.  Furthermore, if Emacs is compiled with both GTK and
Fontconfig support, the "Set Default Font" item uses the GTK font
selection dialog instead of an Emacs pop-up menu.
172

Chong Yidong's avatar
Chong Yidong committed
173 174
*** The font setting chosen by "Set Default Font" is saved if the
"Save Options" item is used.
175

Chong Yidong's avatar
Chong Yidong committed
176
*** The Options menu contains a new entry to turn on Longlines mode.
Glenn Morris's avatar
Glenn Morris committed
177

Chong Yidong's avatar
Chong Yidong committed
178
** Mode-line changes
179

Chong Yidong's avatar
Chong Yidong committed
180 181
*** The mode-line displays a `@', instead of `-', if the
default-directory for the current buffer is on a remote machine.
182

Chong Yidong's avatar
Chong Yidong committed
183 184
*** 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.
185

Chong Yidong's avatar
Chong Yidong committed
186 187
*** The `mode-line-emphasis' face is used to highlight certain
mode-line information (e.g. waiting for a VC command to finish).
188

Chong Yidong's avatar
Chong Yidong committed
189 190 191 192
** Directory-local variables can now be defined.
By default, Emacs looks in .dir-settings.el for directory-local
variables.  For more information, see `set-directory-project' and
`define-project-bindings'.
193

194

195
* Startup Changes in Emacs 23.1
196

197 198 199 200 201 202
** 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.

203 204 205 206
** New user option `initial-buffer-choice' specifies what to display
after starting Emacs: startup screen, *scratch* buffer, visiting a
file or directory.

207 208 209 210
** 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.
211 212

** The abbrev file is no longer read at startup in batch mode.
213

214
* Incompatible Editing Changes in Emacs 23.1
Kim F. Storm's avatar
Kim F. Storm committed
215

216 217 218 219 220
+++
** 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.

Reiner Steib's avatar
Reiner Steib committed
221
** The following input methods were removed in Emacs 22.2, but this was
Juanma Barranquero's avatar
Juanma Barranquero committed
222
not advertised: danish-alt-postfix, esperanto-alt-postfix,
Reiner Steib's avatar
Reiner Steib committed
223 224 225 226
finnish-alt-postfix, german-alt-postfix, icelandic-alt-postfix,
norwegian-alt-postfix, scandinavian-alt-postfix, spanish-alt-postfix,
and swedish-alt-postfix.  Use the versions without "alt-", which are
identical.
227

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

Chong Yidong's avatar
Chong Yidong committed
231 232 233
** C-x C-c now invokes `save-buffers-kill-terminal', and C-z now
invokes `suspend-frame'.  This change is for compatibility with the
new multi-tty support (see `Improved X Window System support' above).
234

Chong Yidong's avatar
Chong Yidong committed
235
** Mark changes
236
+++
237 238 239 240 241
*** Transient Mark mode is now on by default.
+++
*** mark-even-if-inactive now defaults to t
+++
*** When Transient Mark mode is on, C-SPC C-SPC pushes a mark without activating it.
242
+++
243 244
*** When Transient Mark mode is on, M-q now fills the region if the
region is active.  Otherwise, it fills the current paragraph.
Juri Linkov's avatar
Juri Linkov committed
245
+++
246 247
*** When Transient Mark mode is on, M-$ now checks spelling of the
region if the region is active.  Otherwise, it checks spelling of the
Juri Linkov's avatar
Juri Linkov committed
248
word at point.
249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268
*** When Transient Mark mode is on, TAB now indents the region if the
region is active.
*** `use-empty-active-region' controls whether an empty active region
in Transient Mark mode should make commands operate on that empty
region.

** Temporarily active regions

*** The new variable shift-select-mode, non-nil by default, controls
shift-selection.  When Shift Select mode is on, shift-translated
motion keys (e.g. S-left and S-down) activate and extend a temporary
region, similar to mouse-selection.

*** Temporarily active regions, created using shift-selection or
mouse-selection, are not necessarily deactivated in the next command.
They are only deactivated after point motion commands that are not
shift-translated, or after commands that would ordinarily deactivate
the mark in Transient Mark mode (e.g., any command that modifies the
buffer).

269
** Minibuffer changes
270

Chong Yidong's avatar
Chong Yidong committed
271 272 273 274
*** 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.
275

276 277 278 279 280 281
*** 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.
282

Chong Yidong's avatar
Chong Yidong committed
283 284 285 286
*** Minibuffer input of shell commands now comes with completion.

*** In the `C-x d' (Dired) prompt, typing M-n gives the visited file
name of the current buffer.
287

Chong Yidong's avatar
Chong Yidong committed
288 289 290 291 292
*** In the M-! (shell-command) prompt, M-n provides some default commands.
These are guessed using the file extension of the current file, based
on the file-handlers specified in the operating system's `mailcap'
file.  The ! command in Dired (dired-do-shell-command) works
similarly, using the file displayed on the current line.
293 294 295 296 297 298

*** 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.

299 300 301 302 303 304 305 306
*** 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.

307 308 309 310 311
** Face changes

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

312 313 314 315
*** S-down-mouse-1 now pops up a menu for changing the default font
and text size of the default face in the current buffer.  The face is
changed via face remapping (see below).

Glenn Morris's avatar
Glenn Morris committed
316 317
*** FIXME face-remap

Chong Yidong's avatar
Chong Yidong committed
318
** Primary selection changes
319

Chong Yidong's avatar
Chong Yidong committed
320 321 322 323
*** 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.
Stefan Monnier's avatar
Stefan Monnier committed
324

Chong Yidong's avatar
Chong Yidong committed
325 326
*** You can disable kill ring commands from accessing the primary selection
by setting `x-select-enable-primary' to nil.
327

Chong Yidong's avatar
Chong Yidong committed
328
** Completion changes
329

Chong Yidong's avatar
Chong Yidong committed
330 331
*** `completion-styles' can be customized to choose your favorite
completion style.
332

Chong Yidong's avatar
Chong Yidong committed
333
*** The default completion styles include a form of partial-completion.
334

Chong Yidong's avatar
Chong Yidong committed
335 336
*** The new command `minibuffer-force-complete' chooses one of the
possible completions, rather than stopping at the common prefix.
Glenn Morris's avatar
Glenn Morris committed
337

Chong Yidong's avatar
Chong Yidong committed
338 339 340
*** `completion-auto-help' can be set to `lazy' to list the completions only
if you repeat the completion.  This was already supported in
`partial-completion-mode'.
Thien-Thi Nguyen's avatar
Thien-Thi Nguyen committed
341

Chong Yidong's avatar
Chong Yidong committed
342
** Miscellaneous changes:
343

Chong Yidong's avatar
Chong Yidong committed
344 345 346
*** C-l is bound to the new command recenter-top-bottom, rather than recenter.
This moves the current line to window center, top and bottom on
successive invokations.
Michael Olson's avatar
Michael Olson committed
347

Chong Yidong's avatar
Chong Yidong committed
348
*** scroll-preserve-screen-position also preserves the column position.
Michael Olson's avatar
Michael Olson committed
349

Chong Yidong's avatar
Chong Yidong committed
350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371
*** The new command balance-windows-area balances windows both
vertically and horizontally.

*** 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.

+++
*** 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'.

*** The command shell prompts for the default directory, when it is
called with a prefix and the default directory is a remote file name.
This is because some file name handlers (like ange-ftp) are not able to
run processes remotely.

*** The new command kill-matching-buffers kills buffers whose name
matches a regexp.

*** The new commands `pp-macroexpand-expression' and `pp-macroexpand-last-sexp'
pretty-print macro expansions.
Michael Albinus's avatar
Michael Albinus committed
372

Chong Yidong's avatar
Chong Yidong committed
373 374

* New Modes and Packages in Emacs 23.1
375

Chong Yidong's avatar
Chong Yidong committed
376 377
** FIXME add details of new packages imported from lisp/gnus.
[Maybe some information from doc/misc/gnus-coding.texi can be reused]
378

379 380 381 382
** 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').

Chong Yidong's avatar
Chong Yidong committed
383
** Bubbles, a new game, is similar to SameGame.
384

385 386
** bug-reference.el provides clickable links to bug reports.

Chong Yidong's avatar
Chong Yidong committed
387
** copyright.el adds utilities for specifying copyright holders' names.
388

Chong Yidong's avatar
Chong Yidong committed
389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440
*** Only copyright lines with holders matching copyright-names-regexp
will be considered for update.

*** The Copyright package looks for copyright at the end of the buffer
if `copyright-at-end-flag' is non-nil (change-log-mode sets this).

** dbus.el provides D-Bus language bindings.
D-Bus is an inter-process communication mechanism for applications
residing on the same host, based on messages.  See the manual for
details.

** Doc View Mode supports viewing of PDF, PostScript and DVI documents
inside an Emacs buffer.  It works by converting the document to a set
of PNG images first.  One can also search for a regular expression in
the document.  The commentary in doc-view.el explains its usage.

** EasyPG is an all-in-one GnuPG interface.
It includes GnuPG keyring browser, cryptographic operations on regions
and files, and automatic encryption of *.gpg files.  For details, see
the EasyPG Assistant User's Manual.

** json.el is a library for parsing and generating JSON
(JavaScript Object Notation), a lightweight data-interchange format.

** linum.el is a new minor mode to display line numbers for the
current buffer.

** minibuffer-indicate-depth-mode shows the minibuffer depth in the prompt.

** nXML Mode
This is a new mode for editing XML documents.  It allows a schema to
be associated with the XML document being edited, using Relax NG as
the 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.

** proced.el provides a Dired-like interface for operating on processes.
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.

** Remember Mode is a mode for jotting down things to remember.
Notes can be saved to a Diary file.  For details, see the Remember
Manual.

** RST mode is a major mode for editing ReSTructured-Text files.
441

442 443 444 445
** 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...]

Chong Yidong's avatar
Chong Yidong committed
446 447 448 449 450 451 452 453 454
** zeroconf.el offers service discovery and service publishing
interfaces according to the zeroconf specification.  It communicates
with Avahi, a zeroconf implementation, via D-Bus messages on systems
which have installed this software.


* Changes in Specialized Modes and Packages in Emacs 23.1

** Abbrev has been rewritten in Elisp and extended with more flexibility.
Stefan Monnier's avatar
Stefan Monnier committed
455
*** New functions: abbrev-get, abbrev-put, abbrev-table-get, abbrev-table-put,
456
    abbrev-table-p, abbrev-insert, abbrev-table-menu.
Stefan Monnier's avatar
Stefan Monnier committed
457 458 459 460 461 462
*** 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:
463
    `:count', `:system', `:enable-function', `:case-fixed'.
Stefan Monnier's avatar
Stefan Monnier committed
464 465 466 467
*** Abbrev-tables have now the following special properties:
    `:parents', `:case-fixed', `:enable-function', `:regexp',
    `abbrev-table-modiff'.

Chong Yidong's avatar
Chong Yidong committed
468 469 470
** Apropos
*** `apropos-library' describes the elements defined in a given library.
*** Set `apropos-compact-layout' is you want a more compact (but wider) layout.
Martin Rudalics's avatar
Martin Rudalics committed
471

Chong Yidong's avatar
Chong Yidong committed
472
** Archive Mode has basic support to browse Rar archives.
Martin Rudalics's avatar
Martin Rudalics committed
473

Chong Yidong's avatar
Chong Yidong committed
474
** BibTeX mode
Juri Linkov's avatar
Juri Linkov committed
475

Chong Yidong's avatar
Chong Yidong committed
476
*** New command `bibtex-initialize' (re)initializes BibTeX buffers.
Juri Linkov's avatar
Juri Linkov committed
477

Chong Yidong's avatar
Chong Yidong committed
478 479
*** New `bibtex-entry-format' options `whitespace', `braces', and
`string', disabled by default.
Juri Linkov's avatar
Juri Linkov committed
480

Chong Yidong's avatar
Chong Yidong committed
481 482
*** New variable `bibtex-cite-matcher-alist' contains rules to
identify cited keys in BibTeX entries, used by `bibtex-find-crossref'.
483

Chong Yidong's avatar
Chong Yidong committed
484
*** Command `bibtex-url' allows multiple URLs per entry.
Glenn Morris's avatar
Glenn Morris committed
485

Chong Yidong's avatar
Chong Yidong committed
486
** Calendar and diary
Juri Linkov's avatar
Juri Linkov committed
487

Chong Yidong's avatar
Chong Yidong committed
488 489 490 491 492
+++
*** 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'.
Stefan Monnier's avatar
Stefan Monnier committed
493

Chong Yidong's avatar
Chong Yidong committed
494 495 496 497 498 499 500 501 502 503 504 505 506
+++
*** The calendar namespace has been rationalized.
All functions and variables now begin with a `calendar-', `diary-', or
`holiday-' prefix.  The various calendar systems have secondary
prefixes, eg `calendar-french-'.  The old names you are likely to use
directly still exist, for the time being, as aliases, but please start
using the new names.

*** The function `holiday-chinese' computes holidays on the Chinese calendar.
It has been used to add items to the list `holiday-oriental-holidays'.

*** `diary-remind' accepts a negative number -DAYS as a shorthand for
the list (1 2 ... DAYS).
507

Dan Nicolaescu's avatar
Dan Nicolaescu committed
508 509 510 511 512 513 514
** Compile and grep modes

*** The mode-line entry for the *compilation* and *grep* buffer is color coded.
It has different colors for to show that: (a) the command is still
running, (b) successful completion, (c) error.

*** compilation-auto-jump-to-first-error tells `compile' to jump to
515 516
the first error encountered during compilations.

Chong Yidong's avatar
Chong Yidong committed
517
** Custom
518
+++
Chong Yidong's avatar
Chong Yidong committed
519
*** defcustom accepts new keyword arguments, `:safe' and `:risky', which
520 521
set a variable's `safe-local-variable' and `risky-local-variable' property.

Chong Yidong's avatar
Chong Yidong committed
522
** Diff mode
523

Chong Yidong's avatar
Chong Yidong committed
524 525 526
*** 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'.
527

Chong Yidong's avatar
Chong Yidong committed
528 529 530
*** 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'.
531

Chong Yidong's avatar
Chong Yidong committed
532 533
** Fortran
*** The variable `fortran-line-length' can change the fixed-form line-length.
Dan Nicolaescu's avatar
Dan Nicolaescu committed
534

Chong Yidong's avatar
Chong Yidong committed
535 536
*** In Fortran mode, M-; is now bound to the standard comment-dwim,
rather than fortran-indent-comment.
Dan Nicolaescu's avatar
Dan Nicolaescu committed
537

Chong Yidong's avatar
Chong Yidong committed
538 539
+++
*** (The increasingly misnamed) F90 mode supports Fortran 2003 syntax.
Dan Nicolaescu's avatar
Dan Nicolaescu committed
540

Chong Yidong's avatar
Chong Yidong committed
541
** Gnus
542

Chong Yidong's avatar
Chong Yidong committed
543 544 545
*** The Gnus package has been updated
There are many news features, bug fixes and improvements; see the file
GNUS-NEWS or the node "No Gnus" in the Gnus manual for details.
Eric S. Raymond's avatar
Eric S. Raymond committed
546

Chong Yidong's avatar
Chong Yidong committed
547 548 549 550
*** 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'.
551

Chong Yidong's avatar
Chong Yidong committed
552 553 554 555 556 557 558
** Help mode
*** New macro `with-help-window' should set up help windows better
than `with-output-to-temp-buffer' with `print-help-return-message'.
*** New option `help-window-select' permits to customize whether help
window shall be automatically selected when invoking help.
*** New variable `help-window-point-marker' permits to specify new
position of point in help window (for example in `view-lossage').
559

Chong Yidong's avatar
Chong Yidong committed
560
** Isearch
561

Chong Yidong's avatar
Chong Yidong committed
562 563
*** New command `isearch-occur' bound to `M-s o' in isearch mode
runs `occur' with the current search string.
564

Chong Yidong's avatar
Chong Yidong committed
565 566 567 568
*** isearch can now search through multiple ChangeLog files.
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).
569

Chong Yidong's avatar
Chong Yidong committed
570
This is enabled if isearch-buffers-multi is non-nil.
571

Chong Yidong's avatar
Chong Yidong committed
572 573
*** The part of an isearch that failed to match is highlighted in `isearch-fail'
face.
574

Chong Yidong's avatar
Chong Yidong committed
575 576 577 578 579
*** `C-h C-h' in isearch mode displays isearch-specific Help screen,
`C-h b' displays all isearch key bindings, `C-h k' displays the full
documentation of the given isearch key sequence, `C-h m' displays
documentation of isearch mode.  All the rest Help commands exit isearch mode
and execute their global definitions.
Glenn Morris's avatar
Glenn Morris committed
580

Chong Yidong's avatar
Chong Yidong committed
581 582
*** When started in the minibuffer, Isearch searches in the minibuffer
history.  See `Minibuffer changes', above.
Roland Winkler's avatar
Roland Winkler committed
583

Chong Yidong's avatar
Chong Yidong committed
584 585 586
** Python
*** 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.
Roland Winkler's avatar
Roland Winkler committed
587

Chong Yidong's avatar
Chong Yidong committed
588 589 590 591
*** 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.
Roland Winkler's avatar
Roland Winkler committed
592

Chong Yidong's avatar
Chong Yidong committed
593
** T-mouse Mode
Roland Winkler's avatar
Roland Winkler committed
594

Chong Yidong's avatar
Chong Yidong committed
595 596 597 598 599
*** If the gpm mouse server is running and t-mouse-mode is 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.
Roland Winkler's avatar
Roland Winkler committed
600

601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629
+++
** 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.

630 631 632 633
*** Passwords can be read from an authentification file.
Tramp uses the package `auth-source' to read passwords from a file, if
necessary.

Chong Yidong's avatar
Chong Yidong committed
634
** VC
635

Chong Yidong's avatar
Chong Yidong committed
636 637 638 639 640
*** VC now supports applying VC operations to a set of files at a time.
This enables VC to work much more effectively with changeset-oriented
version-control systems such as Subversion, GNU Arch, Mercurial, Git
and Bzr.  VC will now pass a multiple-file commit to these systems as
a single changeset.
641

Chong Yidong's avatar
Chong Yidong committed
642 643 644
*** vc-dir is a new command that displays file names and their VC
status.  It allows to apply various VC operations to a file or a
set of files.
Glenn Morris's avatar
Glenn Morris committed
645

Chong Yidong's avatar
Chong Yidong committed
646
*** Clicking on the VC mode-line entry now pops the VC menu.
Glenn Morris's avatar
Glenn Morris committed
647

Chong Yidong's avatar
Chong Yidong committed
648
*** The VC mode-line entry now has a tooltip that explains the VC file status.
649

Chong Yidong's avatar
Chong Yidong committed
650 651 652
*** In VC Annotate mode, for VC systems that support changesets, you can
see the diff for the whole changeset (not only for the current file)
by using the vc-annotate-show-changeset-diff-revision-at-line function.
653

Chong Yidong's avatar
Chong Yidong committed
654
*** In VC Annotate mode, you can type V to toggle the annotation visibility.
655

Chong Yidong's avatar
Chong Yidong committed
656 657
*** In VC Annotate mode, you can type f to show the file revision on
the current line.
Nick Roberts's avatar
Nick Roberts committed
658

Chong Yidong's avatar
Chong Yidong committed
659
*** vc-git supports the "git grep" command.
Reiner Steib's avatar
Reiner Steib committed
660

Chong Yidong's avatar
Chong Yidong committed
661 662 663
*** Asynchronous VC commands display [Waiting...] in the mode-line
of the corresponding buffer as long as the asynchronous process is
active.
Reiner Steib's avatar
Reiner Steib committed
664

Chong Yidong's avatar
Chong Yidong committed
665 666 667
*** Log entries can be modified using the key "e" in log-view.
For now only CVS, RCS, SCCS and SVN support this functionality.
This is done by the `modify-change-comment' backend function.
668

Chong Yidong's avatar
Chong Yidong committed
669 670 671
*** In log-view-mode, for VC systems that support changesets, you can
see the diff for the whole changeset (not only for the current file)
by typing the D key or using the "Changeset Diff" menu entry.
Reiner Steib's avatar
Reiner Steib committed
672

Chong Yidong's avatar
Chong Yidong committed
673 674
*** VC Support for Meta-CVS has been removed for lack of maintainer able
to update it to the new VC.
Reiner Steib's avatar
Reiner Steib committed
675

676 677
** Miscellaneous

Chong Yidong's avatar
Chong Yidong committed
678 679
*** In Change Log mode, the new command C-c C-f (change-log-find-file)
finds the file associated with the current log entry.
680

681
*** comint-mode uses `start-file-process' now (see Lisp Changes).
682 683 684
If `default-directory' is a remote file name, subprocesses are started
on the corresponding remote system.

Chong Yidong's avatar
Chong Yidong committed
685
*** In Dired, C-x C-q now runs the command wdired-change-to-wdired-mode,
686 687
and C-x C-q in wdired-mode exits it with asking a question about
saving changes.
688

Chong Yidong's avatar
Chong Yidong committed
689 690
*** Eldoc highlights the function argument under point
with the face `eldoc-highlight-function-argument'.
691

Chong Yidong's avatar
Chong Yidong committed
692 693 694
*** In Etags, 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.
Glenn Morris's avatar
Glenn Morris committed
695

Chong Yidong's avatar
Chong Yidong committed
696 697 698 699 700 701 702
*** The `gdb' command only works with the graphical interface now.
Use `gud-gdb' if you want the (old) text command mode.

*** goto-address.el provides two new minor modes, goto-address-mode and
goto-address-prog-mode, which buttonize URLS and email addresses.

*** The new command `eshell/info' runs info in an eshell buffer.
Glenn Morris's avatar
Glenn Morris committed
703

Glenn Morris's avatar
Glenn Morris committed
704 705 706
*** The new variable `ffap-rfc-directories' specifies a list of local
directories in which `ffap-rfc' will first search for RFCs.

Chong Yidong's avatar
Chong Yidong committed
707 708 709 710 711 712 713 714 715 716
*** hide-ifdef-mode allows shadowing ifdef-blocks instead of hiding them.
See option `hide-ifdef-shadow' and function `hide-ifdef-toggle-shadowing'.

*** `icomplete-prospects-height' now supercedes `icomplete-prospects-length'.

*** Info displays breadcrumbs in the header of the page.
See Info-breadcrumbs-depth to control it.

*** In Log Edit mode,  C-c C-d now shows the diff for the files involved.

Glenn Morris's avatar
Glenn Morris committed
717
*** net-utils has an `iwconfig' command, similar to the existing `ifconfig'.
Dan Nicolaescu's avatar
Dan Nicolaescu committed
718
It is used to configure wireless interfaces.
Glenn Morris's avatar
Glenn Morris committed
719

Chong Yidong's avatar
Chong Yidong committed
720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743
*** The pcmpl-unix package supports hostname completion for ssh and scp.

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

*** smerge-refine highlights word-level details of changes in conflict.
It's used automatically as you move through conflicts, see smerge-auto-refine.

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

*** A new command `display-time-world' has been added to the Time
package.  It creates a buffer with an updating time display using
several time zones.

*** 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.

*** view-remove-frame-by-deleting is now by default t
since users found iconification of view-mode frames distracting.

*** WoMan tries to add locale-specific manual page directories to the
search path.  This can be disabled by setting `woman-locale' to nil.

744 745

* Changes in Emacs 23.1 on non-free operating systems
Juri Linkov's avatar
Juri Linkov committed
746

747 748 749 750 751 752
** Case is now considered significant in completion on MS-Windows.
The default value of `completion-ignore-case' is now nil on
MS-Windows, the same as it is for other operating systems.  The
variable doesn't apply to reading a file name -- in that case Emacs
heeds `read-file-name-completion-ignore-case' instead.

Jason Rumney's avatar
Jason Rumney committed
753 754 755
---
** IPv6 is supported on MS-Windows.
Emacs now supports IPv6 on Windows XP and later, and earlier versions
Jason Rumney's avatar
Jason Rumney committed
756
of Windows with third party IPv6 stacks installed.  In Emacs 22, IPv6 was
Jason Rumney's avatar
Jason Rumney committed
757 758 759
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.

760
---
761 762
** Busy cursor (hourglass) now displays on MS-Windows.
When Emacs is busy, an hourglass mouse cursor is displayed on Windows.
Jason Rumney's avatar
Jason Rumney committed
763 764 765 766 767 768 769 770
In Emacs 22 only X supported the busy cursor.

---
** Battery status is available on MS-Windows
Emacs can now display the battery status in the mode-line when enabled with
display-battery-mode or from the Options menu.  More verbose battery
information is also available with the command `battery'.  In Emacs 22
battery status was supported only on GNU/Linux and Mac.
771

Jason Rumney's avatar
Jason Rumney committed
772 773 774 775 776 777 778 779 780 781
** 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
782
w32-pass-multimedia-buttons to nil.  See the doc string of that variable
Jason Rumney's avatar
Jason Rumney committed
783
for the list of extra keys that are available.
Jason Rumney's avatar
Jason Rumney committed
784

785 786

* Incompatible Lisp Changes in Emacs 23.1
787

788
** Variables cannot be both buffer-local and frame-local any more.
789 790 791 792 793 794
** The argument DEFAULT of minibuffer input functions `read-from-minibuffer',
`read-string', `completing-read', `read-buffer', `read-command',
`read-variable' now can be a list of default values.  The elements of
this list are available for inserting to the minibuffer with `M-n'.
If the user enters empty input, the first element is used as the default.

795
** `functionp' returns nil for special forms.
Juanma Barranquero's avatar
Juanma Barranquero committed
796
I.e., it only returns t for objects that can be passed to `funcall'.
797

798
+++
799 800 801 802
** 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.

803 804 805 806 807 808 809 810 811
** 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.

812 813 814
** 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.
815

816 817 818
+++
** The function `dired-call-process' has been removed.

819
** The variable `byte-compile-warnings' can now be a list starting with `not',
Juanma Barranquero's avatar
Juanma Barranquero committed
820
meaning to disable the specified warnings.  The meaning of this list
821
may therefore be the reverse of what you expect (of course, this is
Juanma Barranquero's avatar
Juanma Barranquero committed
822
only an issue if you make use of the new `not' syntax).  Rather than
823 824 825 826
checking/manipulating elements directly, use the new functions
`byte-compile-warning-enabled-p', `byte-compile-disable-warning', and
`byte-compile-enable-warning.'

827 828 829
** `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
830 831 832 833 834 835 836 837 838 839 840 841 842 843 844
** 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).
845

846 847

* Lisp Changes in Emacs 23.1
Juri Linkov's avatar
Juri Linkov committed
848

Chong Yidong's avatar
Chong Yidong committed
849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883
** 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.

** Emacs session information

*** The new variables `before-init-time' and `after-init-time' record the
value of `current-time' before and after Emacs loads the init files.

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

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

** The new function `format-seconds' converts a number of seconds into a
readable string of days, hours, etc.

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

** If you set find-file-confirm-nonexistent-file to t, then C-x C-f
requires confirmation before opening a non-existent file.

** 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.

** Changes affecting display-buffer
*** New value nil for split-height-threshold inhibits vertical splitting
unless there's no other window.
*** New option split-width-threshold controls horizontal splitting.
*** A window can be split horizontally even when it's not full-width.
*** New option split-window-preferred-function can be set to a function
to override the default splitting mechanism of display-buffer.

884 885 886
** The variable window-point-insertion-type determines the insertion-type
of the marker used for window-point.

887 888 889
** minibuffer-local-must-match-filename-map is now named
minibuffer-local-filename-must-match-map.

890 891 892 893 894 895 896
** `all-completions' may now return the base size in the last cdr.
Since this means the returned list is not properly nil-terminated, this
is an incompatible change and is thus enabled by the new variable
completion-all-completions-with-base-size.

** New function `apply-partially' for curried application.

897 898 899
** `fill-forward-paragraph-function' specifies which function the filling
code should use to find paragraph boundaries.

900 901 902 903 904 905 906 907
** The variable `this-command-keys-shift-translated' is non-nil if the
key sequence invoking the current command was found by
shift-translation.

** The new interactive spec code ^ says to first call
handle-shift-selection if shift-select-mode is non-nil, before reading
the command arguments.

Glenn Morris's avatar
Glenn Morris committed
908 909
** When deleting a terminal, the special hook `delete-terminal-functions'
is run.
910

911 912 913 914
** 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.
915 916
This can be useful for modes such as tar-mode, archive-mode, RMAIL.

917 918
** `clear-image-cache' can be told to flush only images of a specific file.

919
** clone-indirect-buffer now runs the clone-indirect-buffer-hook.
920

921
** `beginning-of-defun-function' now takes one argument, the count
922
 given to `beginning-of-defun'.
923

924 925 926
** The variable `inhibit-changing-match-data', if non-nil, prevents the
search and match primitives from changing the match data.

927 928 929 930
+++
** New function `match-substitute-replacement' returns the result of
`replace-match' without actually using it in the buffer.

931 932 933 934 935 936 937 938
** The new variable `replace-search-function' determines the function
to use for searching in query-replace and replace-string.

** The new variable `replace-re-search-function' determines the
function to use for searching in `query-replace-regexp',
`replace-regexp', + `query-replace-regexp-eval', and
`map-query-replace-regexp'.

939 940 941 942 943
** 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.

944 945 946 947 948 949 950
+++
** 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.

951 952 953
** `custom-note-var-changed' tells Custom to treat the change in a certain
variable as having been made within Custom.

954 955
** `frame-inherited-parameters' lets new frames inherit parameters from
the selected frame.
956

957
** Commands should use `use-region-p' to test whether there is
958 959
an active region that they should operate on.

960 961 962 963 964
** `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'.

965 966 967 968 969 970
** If a command sets `transient-mark-mode' to (only . OLDVAL), that
means to activate transient-mark-mode temporarily, until the next
unshifted point motion command or mark deactivation.  Afterwards,
reset transient-mark-mode to the value OLDVAL.  The values `only' and
`identity', introduced in Emacs 22, are now deprecated.

971 972 973 974 975
** 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.

976 977 978 979 980
** 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).

Glenn Morris's avatar
Glenn Morris committed
981 982
** `ignore-errors' is now a standard macro (does not require the CL package).

983 984
** The new function `read-color' reads a color name using the minibuffer.

985 986 987 988
** `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.

989 990
** Character code, representation, and charset changes.

Juanma Barranquero's avatar
Juanma Barranquero committed
991
The character code space is now 0x0..0x3FFFFF with no gap.
992 993 994
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
995
Generic characters no longer exist.
996 997 998 999 1000 1001 1002 1003 1004

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
1005
is a character.  This replaces `char-valid-p', which is now obsolete.
1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055

*** 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.
1056 1057
+++
*** `translation-table-for-input' is now obsolete.
1058

1059
** Code conversion changes
1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092

*** 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
1093
It has three functionalities:
1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105
 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.

1106
** Changes related to the new font backend
1107

1108 1109
Which font backends to use can be specified by the X resource "FontBackend".
For instance, to use both X core fonts and Xft fonts:
1110

1111
Emacs.FontBackend: x,xft
1112

1113 1114
If this resource is not set, Emacs tries to use all font backends
avai