NEWS 430 KB
Newer Older
Gerd Moellmann's avatar
Gerd Moellmann committed
1
GNU Emacs NEWS -- history of user-visible changes.  2001-03-15
Colin Walters's avatar
Colin Walters committed
2
Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
Dave Love's avatar
#  
Dave Love committed
3 4 5
See the end for copying conditions.

Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
Gerd Moellmann's avatar
Gerd Moellmann committed
6
For older news, see the file ONEWS
Dave Love's avatar
#  
Dave Love committed
7

8 9 10 11
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 ---
12
so we will look at it and add it to the manual.
13

14

Kim F. Storm's avatar
Kim F. Storm committed
15
* Installation Changes in Emacs 21.4
16

17
---
18 19
** Emacs can now be built without sound support.

20
---
21 22 23 24
** Emacs now supports new configure options `--program-prefix',
`--program-suffix' and `--program-transform-name' that affect the names of
installed programs.

25
---
Colin Walters's avatar
Colin Walters committed
26
** By default, Emacs now uses a setgid helper program to update game
Colin Walters's avatar
Colin Walters committed
27 28 29 30
scores.  The directory ${localstatedir}/games/emacs is the normal
place for game scores to be stored.  This may be controlled by the
configure option `--with-game-dir'.  The specific user that Emacs uses
to own the game scores is controlled by `--with-game-user'.  If access
Colin Walters's avatar
Colin Walters committed
31 32
to a game user is not available, then scores will be stored separately
in each user's home directory.
Colin Walters's avatar
Colin Walters committed
33

34 35 36 37 38
---
** Leim is now part of the Emacs distribution.
You no longer need to download a separate tarball in order to build
Emacs with Leim.

Eli Zaretskii's avatar
Eli Zaretskii committed
39 40 41
---
** Support for AIX 5.1 was added.

42
---
Gerd Moellmann's avatar
Gerd Moellmann committed
43 44
** Support for FreeBSD/Alpha has been added.

45 46 47
---
** Support for BSD/OS 5.0 was added.

48 49 50
---
** Support for GNU/Linux systems on S390 machines was added.

Eli Zaretskii's avatar
Eli Zaretskii committed
51 52 53 54
---
** Support for MacOS X was added.
See the files mac/README and mac/INSTALL for build instructions.

55
---
Andreas Schwab's avatar
Andreas Schwab committed
56
** Support for GNU/Linux systems on X86-64 machines was added.
Gerd Moellmann's avatar
Gerd Moellmann committed
57

Kim F. Storm's avatar
Kim F. Storm committed
58
* Changes in Emacs 21.4
Stefan Monnier's avatar
Stefan Monnier committed
59

60 61 62 63 64 65
+++
** You can now customize the use of window fringes.  To control this
for all frames, use M-x fringe-mode or the Show/Hide submenu of the
top-level Options menu, or customize the `fringe-mode' variable.  To
control this for a specific frame, use the command M-x
set-fringe-style.
Simon Josefsson's avatar
Simon Josefsson committed
66

67
+++
68 69 70 71 72
** There is a new user option `mail-default-directory' that allows you
to specify the value of `default-directory' for mail buffers.  This
directory is used for auto-save files of mail buffers.  It defaults to
"~/".

73
+++
74 75 76 77 78
** When you are root, and you visit a file whose modes specify
read-only, the Emacs buffer is now read-only too.  Type C-x C-q if you
want to make the buffer writable.  (As root, you will in fact be able
to alter the file.)

79 80 81 82 83 84 85
---
** ps-print can now print Unicode characters.

Printing text with characters from the mule-unicode-* sets works with
ps-print, provided that you have installed the appropriate BDF fonts.
See the file INSTALL for URLs where you can find these fonts.

Eli Zaretskii's avatar
Eli Zaretskii committed
86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106
---
** The new options `buffers-menu-show-directories' and
`buffers-menu-show-status' let you control how buffers are displayed
in the menu dropped down when you click "Buffers" from the menu bar.

`buffers-menu-show-directories' controls whether the menu displays
leading directories as part of the file name visited by the buffer.
If its value is `unless-uniquify', the default, directories will be
shown unless uniquify-buffer-name-style' is non-nil.  The value of nil
and t turn the display of directories off and on, respectively.

`buffers-menu-show-status' controls whether the Buffers menu includes
the modified and read-only status of the buffers.  By default it is
t, and the status is shown.

Setting these variables directly does not take effect until next time
the Buffers menu is regenerated.

+++
** `C-u C-x =' now displays text properties of the character at point.

107
+++
108
** The commands M-x customize-face and M-x customize-face-other-window
109 110 111
now look at the character after point.  If a face or faces are
specified for that character, the commands by default customize those
faces.
112

Dave Love's avatar
Dave Love committed
113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137
** New language environments: French, Cyrillic-KOI8-U, Windows-1251,
Cyrillic-KOI8-T, Bulgarian, Belarusian, Ukrainian, UTF-8,
Windows-1255, Welsh, Latin-7, Lithuanian, Latvian.

** New input methods: latin-alt-postfix, latin-postfix, latin-prefix,
ukrainian-computer, belarusian, bulgarian-bds, russian-computer,
vietnamese-telex, lithuanian-numeric, lithuanian-keyboard,
latvian-keyboard, welsh, georgian, rfc1345, ucs, sgml,
bulgarian-phonetic, dutch.

** Many new coding systems are available by loading the `code-pages'
library.  These include complete versions of most of those in
codepage.el, based Unicode mappings.

** The utf-8 coding system has been enhanced.  Untranslatable utf-8
sequences (mostly representing CJK characters) are composed into
single quasi-characters.  By loading the library utf-8-subst, you can
arrange to translate many utf-8 CJK character sequences into real
Emacs characters in a similar way to the Mule-UCS system.  The utf-8
coding system will now encode characters from most of Emacs's
one-dimensional internal charsets, specifically the ISO-8859 ones.

** New command `ucs-insert' inserts a character specified by its
Unicode.

138
+++
Dave Love's avatar
Dave Love committed
139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154
** Limited support for character unification has been added.
Emacs now knows how to translate Latin-N chars between their charset
and some other Latin-N charset or Unicode.  By default this
translation will happen automatically on encoding.  Quail input
methods use the translations to make the input conformant with the
encoding of the buffer in which it's being used where possible.

You can force a more complete unification with the user option
unify-8859-on-decoding-mode.  That maps all the Latin-N character sets
into Unicode characters (from the latin-iso8859-1 and
mule-unicode-0100-24ff charsets) on decoding.

** There is support for decoding Greek and Cyrillic characters into
either Unicode (the mule-unicode charsets) or the iso-8859 charsets,
when possible.  The latter are more space-efficient.  This is
controlled by user option utf-8-fragment-on-decoding.
Stefan Monnier's avatar
Stefan Monnier committed
155

156
---
157
** The scrollbar under LessTif or Motif has a smoother drag-scrolling.
Stefan Monnier's avatar
Stefan Monnier committed
158 159 160
On the other hand, the size of the thumb does not represent the actual
amount of text shown any more (only a crude approximation of it).

161 162 163 164 165 166
+++
** Emacs can produce an underscore-like (horizontal bar) cursor.
The underscore cursor is set by putting `(cursor-type . hbar)' in
default-frame-alist.  It supports variable heights, like the `bar'
cursor does.

167 168 169 170 171 172 173 174
** Filesets are collections of files.  You can define a fileset in
various ways, such as based on a directory tree or based on
program files that include other program files.

Once you have defined a fileset, you can perform various operations on
all the files in it, such as visiting them or searching and replacing
in them.

Eli Zaretskii's avatar
Eli Zaretskii committed
175 176 177 178
---
** PO translation files are decoded according to their MIME headers
when Emacs visits them.

179
---
180 181 182 183 184 185
** The game `mpuz' is enhanced.

`mpuz' now allows the 2nd factor not to have two identical digits.  By
default, all trivial operations involving whole lines are performed
automatically.  The game uses faces for better visual feedback.

186
+++
Kim F. Storm's avatar
Kim F. Storm committed
187 188 189
** On X and MS Windows, the blinking cursor's "off" state is now shown
as a hollow box or a thin bar.

190
+++
191
** Emacs now supports compound-text Extended Segments in X selections.
192 193 194

Some versions of X, notably XFree86, use Extended Segments to encode
in X selections characters that belong to character sets which are not
Eli Zaretskii's avatar
Eli Zaretskii committed
195 196
part of the list of approved standard encodings defined by the ICCCM
spec.  Examples of such non-standard encodings include ISO 8859-14, ISO
197 198 199 200
8859-15, KOI8-R, and BIG5.  The new coding system
`compound-text-with-extensions' supports these extensions, and is now
used by default for encoding and decoding X selections.  If you don't
want this support, set `selection-coding-system' to `compound-text'.
201

202 203
+++
** The parameters of automatic hscrolling can now be customized.
204 205 206
The variable `hscroll-margin' determines how many columns away from
the window edge point is allowed to get before automatic hscrolling
will horizontally scroll the window.  The default value is 5.
207

208 209 210 211 212 213 214
The variable `hscroll-step' determines how many columns automatic
hscrolling will scroll the window when point gets too close to the
window edge.  If its value is zero, the default, Emacs scrolls the
window so as to center point.  If its value is an integer, it says how
many columns to scroll.  If the value is a floating-point number, it
gives the fraction of the window's width to scroll the window.

215
+++
216 217 218 219 220
** The user option `tex-start-options-string' has been replaced
by two new user options: `tex-start-options', which should hold
command-line options to feed to TeX, and `tex-start-commands' which should hold
TeX commands to use at startup.

221 222 223
+++
** The variable `automatic-hscrolling' was renamed to `auto-hscroll-mode'.
The old name is still available as an alias.
224

225
+++
226
** New display feature: focus follows mouse.  If you set the variable
227 228 229 230
mouse-autoselect-window to non-nil value, moving the mouse to a different
Emacs window will select that window (minibuffer window can be selected
only when it is active).  The default is nil, so that this feature is not
enabled.
Pavel Janík's avatar
Pavel Janík committed
231

232 233 234 235 236 237
+++
** The new command `describe-char' (C-u C-x =) pops up a buffer with
description various information about a character, including its
encodings and syntax, its text properties, overlays, and widgets at
point.  You can get more information about some of them, by clicking
on mouse-sensitive areas or moving there and pressing RET.
Eli Zaretskii's avatar
Eli Zaretskii committed
238

Colin Walters's avatar
Colin Walters committed
239 240 241 242 243 244 245
+++
** The new command `multi-occur' is just like `occur', except it can
search multiple buffers.  There is also a new command
`multi-occur-by-filename-regexp' which allows you to specify the
buffers to search by their filename.  Internally, Occur mode has been
rewritten, and now uses font-lock, among other changes.

246
+++
Richard M. Stallman's avatar
Richard M. Stallman committed
247 248 249 250 251
** Emacs normally highlights mouse sensitive text whenever the mouse
is over the text.  By setting the new variable `mouse-highlight', you
can optionally enable mouse highlighting only after you move the
mouse, so that highlighting disappears when you press a key.  You can
also disable mouse highlighting.
252

253
+++
Stefan Monnier's avatar
Stefan Monnier committed
254 255 256 257 258 259
** font-lock: in modes like C and Lisp where the fontification assumes that
an open-paren in column 0 is always outside of any string or comment,
font-lock now highlights any such open-paren-in-column-zero in bold-red
if it is inside a string or a comment, to indicate that it can cause
trouble with fontification and/or indentation.

260 261 262 263 264 265
+++
** There's a new face `minibuffer-prompt'.
Emacs adds this face to the list of text properties stored in the
variable `minibuffer-prompt-properties', which is used to display the
prompt string.

Eli Zaretskii's avatar
Eli Zaretskii committed
266
+++
267 268 269 270
** The new face `mode-line-inactive' is used to display the mode line
of non-selected windows.  The `mode-line' face is now used to display
the mode line of the currently selected window.

271 272 273
The new variable `mode-line-in-non-selected-windows' controls whether
the `mode-line-inactive' face is used.

274
---
Pavel Janík's avatar
Pavel Janík committed
275
** A menu item "Show/Hide" was added to the top-level menu "Options".
276 277 278 279 280 281
This menu allows you to turn various display features on and off (such
as the fringes, the tool bar, the speedbar, and the menu bar itself).
You can also move the vertical scroll bar to either side here or turn
it off completely.  There is also a menu-item to toggle displaying of
current date and time, current line and column number in the
mode-line.
Pavel Janík's avatar
Pavel Janík committed
282

283
---
284 285
** Speedbar has moved from the "Tools" top level menu to "Show/Hide".

286 287 288
+++
** Emacs can now indicate in the mode-line the presence of new e-mails
in a directory or in a file.  See the documentation of the user option
Pavel Janík's avatar
Pavel Janík committed
289
`display-time-mail-directory'.
290

291 292 293 294 295 296 297 298 299 300 301 302
+++
** The new option `Info-scroll-prefer-subnodes' causes Info to behave
like the stand-alone Info reader (from the GNU Texinfo package) as far
as motion between nodes and their subnodes is concerned.  If it is t
(the default), Emacs behaves as before when you type SPC in a menu: it
visits the subnode pointed to by the first menu entry.  If this option
is nil, SPC scrolls to the end of the current node, and only then goes
to the first menu item, like the stand-alone reader does.

This change was already in Emacs 21.1, but wasn't advertised in the
NEWS.

303 304 305
---
** LDAP support now defaults to ldapsearch from OpenLDAP version 2.

306
+++
307
** You can now disable pc-selection-mode after enabling it.
308
M-x pc-selection-mode behaves like a proper minor mode, and with no
309 310 311 312 313
argument it toggles the mode.

Turning off PC-Selection mode restores the global key bindings
that were replaced by turning on the mode.

314
+++
Colin Walters's avatar
Colin Walters committed
315 316 317 318 319 320
** Emacs now displays a splash screen by default even if command-line
arguments were given.  The new command-line option --no-splash
disables the splash screen; see also the variable
`inhibit-startup-message' (which is also aliased as
`inhibit-splash-screen').

321 322
** Changes in support of colors on character terminals

323
+++
324
*** The new command-line option --color=MODE lets you specify a standard
325 326 327 328 329 330 331 332 333
mode for a tty color support.  It is meant to be used on character
terminals whose capabilities are not set correctly in the terminal
database, or with terminal emulators which support colors, but don't
set the TERM environment variable to a name of a color-capable
terminal.  "emacs --color" uses the same color commands as GNU `ls'
when invoked with "ls --color", so if your terminal can support colors
in "ls --color", it will support "emacs --color" as well.  See the
user manual for the possible values of the MODE parameter.

334 335 336 337 338 339 340 341 342 343
---
*** Emacs now supports several character terminals which provide more
than 8 colors.  For example, for `xterm', 16-color, 88-color, and
256-color modes are supported.  Emacs automatically notes at startup
the extended number of colors, and defines the appropriate entries for
all of these colors.

---
*** There's a new support for colors on `rxvt' terminal emulator.

344 345 346 347 348 349
+++
** Emacs can now be invoked in full-screen mode on a windowed display.

When Emacs is invoked on a window system, the new command-line options
`--fullwidth', `--fullheight', and `--fullscreen' produce a frame
whose width, height, or both width and height take up the entire
350
screen size.  (For now, this does not work with some window managers.)
351

352 353
---
** Info-index offers completion.
Stefan Monnier's avatar
Stefan Monnier committed
354

355
---
Colin Walters's avatar
Colin Walters committed
356 357
** shell-mode now supports programmable completion using `pcomplete'.

358
---
Colin Walters's avatar
Colin Walters committed
359
** Emacs now tries to set up buffer coding systems for HTML/XML files
360
automatically.
Colin Walters's avatar
Colin Walters committed
361

362
+++
363 364 365 366 367
** The new command `comint-input-previous-argument' in comint-derived
modes (shell-mode etc) inserts arguments from previous command lines,
like bash's `ESC .' binding.  It is bound by default to `C-c .', but
otherwise behaves quite similarly to the bash version.

368
+++
369 370 371 372 373 374 375 376 377 378 379 380 381
** Changes in C-h bindings:

C-h e displays the *Messages* buffer.

C-h followed by a control character is used for displaying files
    that do not change:

C-h C-f displays the FAQ.
C-h C-e displays the PROBLEMS file.

The info-search bindings on C-h C-f, C-h C-k and C-h C-i
have been moved to C-h F, C-h K and C-h S.

Kim F. Storm's avatar
Kim F. Storm committed
382 383 384 385 386 387 388 389 390 391
C-h c, C-h k, C-h w, and C-h f now handle remapped interactive commands.

- C-h c and C-h k report the actual command (after possible remapping)
  run by the key sequence.

- C-h w and C-h f on a command which has been remapped now report the
  command it is remapped to, and the keys which can be used to run
  that command.

For example, if C-k is bound to kill-line, and kill-line is remapped
392
to new-kill-line, these commands now report:
Kim F. Storm's avatar
Kim F. Storm committed
393 394 395 396 397 398 399 400 401 402

- C-h c and C-h k C-k reports:
  C-k runs the command new-kill-line

- C-h w and C-h f kill-line reports:
  kill-line is remapped to new-kill-line which is on C-k, <deleteline>

- C-h w and C-h f new-kill-line reports:
  new-kill-line is on C-k

403
+++
404 405 406 407 408
** C-w in incremental search now grabs either a character or a word,
making the decision in a heuristic way.  This new job is done by the
command `isearch-yank-word-or-char'.  To restore the old behavior,
bind C-w to `isearch-yank-word' in `isearch-mode-map'.

409
+++
410 411 412 413 414
** Yanking text now discards certain text properties that can
be inconvenient when you did not expect them.  The variable
`yank-excluded-properties' specifies which ones.  Insertion
of register contents and rectangles also discards these properties.

415
+++
Colin Walters's avatar
Colin Walters committed
416 417 418 419 420
** Occur, Info, and comint-derived modes now support using
M-x font-lock-mode to toggle fontification.  The variable
`Info-fontify' is no longer applicable; to disable fontification,
remove `turn-on-font-lock' from `Info-mode-hook'.

421
+++
422 423 424 425 426 427 428
** M-x grep now tries to avoid appending `/dev/null' to the command line
by using GNU grep `-H' option instead.  M-x grep will automatically
detect whether this is possible or not the first time it is invoked.
When `-H' is used, the grep command line supplied by the user is passed
unchanged to the system to execute, which allows more complicated
command lines to be used than was possible before.

429
---
430 431 432 433 434 435 436 437
** The face-customization widget has been reworked to be less confusing.
In particular, when you enable a face attribute using the corresponding
check-box, there's no longer a redundant `*' option in value selection
for that attribute; the values you can choose are only those which make
sense for the attribute.  When an attribute is de-selected by unchecking
its check-box, then the (now ignored, but still present temporarily in
case you re-select the attribute) value is hidden.

438 439
+++
** In GUD mode, when talking to GDB, C-x C-a C-j "jumps" the program
440 441
counter to the specified source line (the one where point is).

442
---
443
** GUD mode improvements for jdb:
444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478

*** Search for source files using jdb classpath and class
    information. Fast startup since there is no need to scan all
    source files up front. There is also no need to create and maintain
    lists of source directories to scan. Look at `gud-jdb-use-classpath'
    and `gud-jdb-classpath' customization variables documentation.

*** Supports the standard breakpoint (gud-break, gud-clear)
    set/clear operations from java source files under the classpath, stack
    traversal (gud-up, gud-down), and run until current stack finish
    (gud-finish).

*** Supports new jdb (Java 1.2 and later) in addition to oldjdb
    (Java 1.1 jdb).

*** The previous method of searching for source files has been
    preserved in case someone still wants/needs to use it.
    Set gud-jdb-use-classpath to nil.

  Added Customization Variables

*** gud-jdb-command-name.  What command line to use to invoke jdb.

*** gud-jdb-use-classpath. Allows selection of java source file searching
    method: set to t for new method, nil to scan gud-jdb-directories for
    java sources (previous method).

*** gud-jdb-directories. List of directories to scan and search for java
    classes using the original gud-jdb method (if gud-jdb-use-classpath
    is nil).

  Minor Improvements

*** Do not allow debugger output history variable to grow without bounds.

479
+++
Stefan Monnier's avatar
Stefan Monnier committed
480 481 482 483
** hide-ifdef-mode now uses overlays rather than selective-display
to hide its text.  This should be mostly transparent but slightly
changes the behavior of motion commands line C-e and C-p.

484
+++
485 486 487 488
** In Dired's ! command (dired-do-shell-command), `*' and `?' now
control substitution of the file names only when they are surrounded
by whitespace.  This means you can now use them as shell wildcards
too.  If you want to use just plain `*' as a wildcard, type `*""'; the
489
doublequotes make no difference in the shell, but they prevent
490 491
special treatment in `dired-do-shell-command'.

492
+++
493 494 495 496
** Dired's v command now runs external viewers to view certain
types of files.  The variable `dired-view-command-alist' controls
what external viewers to use and when.

497
+++
Stefan Monnier's avatar
Stefan Monnier committed
498 499 500 501 502
** Unquoted `$' in file names do not signal an error any more when
the corresponding environment variable does not exist.
Instead, the `$ENVVAR' text is left as is, so that `$$' quoting
is only rarely needed.

503
---
Stefan Monnier's avatar
Stefan Monnier committed
504
** jit-lock can now be delayed with `jit-lock-defer-time'.
505 506

If this variable is non-nil, its value should be the amount of Emacs
507
idle time in seconds to wait before starting fontification.  For
508 509
example, if you set `jit-lock-defer-time' to 0.25, fontification will
only happen after 0.25s of idle time.
Stefan Monnier's avatar
Stefan Monnier committed
510

511 512 513 514 515 516 517
+++
** Marking commands extend the region when invoked multiple times.  If
you hit M-C-SPC (mark-sexp), M-@ (mark-word), M-h (mark-paragraph), or
C-M-h (mark-defun) repeatedly, the marked region will now be extended
each time, so you can mark the next two sexps with M-C-SPC M-C-SPC,
for example.  This feature also works for mark-end-of-sentence, if you
bind that to a key.
Stefan Monnier's avatar
Stefan Monnier committed
518

519
+++
520 521 522 523
** Some commands do something special in Transient Mark mode when the
mark is active--for instance, they limit their operation to the
region.  Even if you don't normally use Transient Mark mode, you might
want to get this behavior from a particular command.  There are two
524 525
ways you can enable Transient Mark mode and activate the mark, for one
command only.
526

527 528 529 530
One method is to type C-SPC C-SPC; this enables Transient Mark mode
and sets the mark at point.  The other method is to type C-u C-x C-x.
This enables Transient Mark mode temporarily but does not alter the
mark or the region.
531

532 533 534 535
After these commands, Transient Mark mode remains enabled until you
deactivate the mark.  That typically happens when you type a command
that alters the buffer, but you can also deactivate the mark by typing
C-g.
536

537
+++
538 539 540 541
** A prefix argument is no longer required to repeat a jump to a
previous mark, i.e. C-u C-SPC C-SPC C-SPC ... will cycle through the
mark ring.  Use C-u C-u C-SPC to set the mark immediately after a jump.

542
+++
543 544 545
** In the *Occur* buffer, `o' switches to it in another window, and
C-o displays the current line's occurrence in another window without
switching to it.
546

547
+++
548 549 550 551
** When you specify a frame size with --geometry, the size applies to
all frames you create.  A position specified with --geometry only
affects the initial frame.

Kai Großjohann's avatar
Kai Großjohann committed
552
+++
553 554
** M-h (mark-paragraph) now accepts a prefix arg.
With positive arg, M-h marks the current and the following paragraphs;
555 556
if the arg is negative, it marks the current and the preceding
paragraphs.
Kai Großjohann's avatar
Kai Großjohann committed
557

558 559 560
** In Dired, the w command now copies the current line's file name
into the kill ring.

561
+++
562 563 564 565 566
** The variables dired-free-space-program and dired-free-space-args
have been renamed to directory-free-space-program and
directory-free-space-args, and they now apply whenever Emacs puts a
directory listing into a buffer.

567
---
Stefan Monnier's avatar
Stefan Monnier committed
568 569 570
** mouse-wheels can now scroll a specific fraction of the window
(rather than a fixed number of lines) and the scrolling is `progressive'.

571
+++
Stefan Monnier's avatar
Stefan Monnier committed
572 573
** The keyboard-coding-system is now automatically set based on
your current locale settings.  If it turns out that your terminal
Stefan Monnier's avatar
Stefan Monnier committed
574 575
does not support the encoding implied by your locale (for example,
it inserts non-ASCII chars if you hit M-i), you will need to add
Stefan Monnier's avatar
Stefan Monnier committed
576 577 578 579 580

	(set-keyboard-coding-system nil)

to your .emacs to revert to the old behavior.

581
---
Werner LEMBERG's avatar
Werner LEMBERG committed
582 583 584 585
** A new coding system `euc-tw' has been added for traditional Chinese
in CNS encoding; it accepts both Big 5 and CNS as input; on saving,
Big 5 is then converted to CNS.

586 587
+++
** Emacs now reads the standard abbrevs file ~/.abbrev_defs
588 589 590
automatically at startup, if it exists.  When Emacs offers to save
modified buffers, it saves the abbrevs too if they have changed.  It
can do this either silently or asking for confirmation first,
Pavel Janík's avatar
Pavel Janík committed
591
according to the value of `save-abbrevs'.
592

593
+++
594 595 596
** Display of hollow cursors now obeys the buffer-local value (if any)
of `cursor-in-non-selected-windows' in the buffer that the cursor
appears in.
Gerd Moellmann's avatar
Gerd Moellmann committed
597

598
+++
599 600 601
** The default values of `tooltip-delay' and `tooltip-hide-delay'
were changed.

602
---
603 604 605
** On terminals whose erase-char is ^H (Backspace), Emacs
now uses normal-erase-is-backspace-mode.

606
---
607 608 609 610
** The variable `auto-save-file-name-transforms' now has a third element that
controls whether or not the function `make-auto-save-file-name' will
attempt to construct a unique auto-save name (e.g. for remote files).

611 612
** VC Changes

André Spiegel's avatar
André Spiegel committed
613 614 615 616 617 618 619 620 621 622
*** The key C-x C-q no longer checks files in or out, it only changes
the read-only state of the buffer (toggle-read-only).  We made this
change because we held a poll and found that many users were unhappy
with the previous behavior.  If you do prefer this behavior, you
can bind `vc-toggle-read-only' to C-x C-q in your .emacs:

    (global-set-key "\C-x\C-q" 'vc-toggle-read-only)

The function `vc-toggle-read-only' will continue to exist.

623
+++
624 625 626 627 628 629 630
*** There is a new user option `vc-cvs-global-switches' that allows
you to specify switches that are passed to any CVS command invoked
by VC.  These switches are used as "global options" for CVS, which
means they are inserted before the command name.  For example, this
allows you to specify a compression level using the "-z#" option for
CVS.

631 632
** EDiff changes.

Michael Kifer's avatar
Michael Kifer committed
633
+++
634 635 636 637 638
***  When comparing directories.
Typing D brings up a buffer that lists the differences between the contents of
directories. Now it is possible to use this buffer to copy the missing files
from one directory to another.

Michael Kifer's avatar
Michael Kifer committed
639
+++
640 641 642 643 644 645
*** When comparing files or buffers.
Typing the = key now offers to perform the word-by-word comparison of the
currently highlighted regions in an inferior Ediff session. If you answer 'n'
then it reverts to the old behavior and asks the user to select regions for
comparison.

646
+++
647 648
** Etags changes.

649 650 651
*** New regular expressions features

**** New syntax for regular expressions, multi-line regular expressions.
652 653 654 655 656
The syntax --ignore-case-regexp=/regex/ is now undocumented and retained
only for backward compatibility.  The new equivalent syntax is
--regex=/regex/i.  More generally, it is --regex=/TAGREGEX/TAGNAME/MODS,
where `/TAGNAME' is optional, as usual, and MODS is a string of 0 or
more characters among `i' (ignore case), `m' (multi-line) and `s'
657 658 659 660 661 662
(single-line).  The `m' and `s' modifiers behave as in Perl regular
expressions: `m' allows regexps to match more than one line, while `s'
(which implies `m') means that `.' matches newlines.  The ability to
span newlines allows writing of much more powerful regular expressions
and rapid prototyping for tagging new languages.

663
**** Regular expressions can use char escape sequences as in Gcc
664 665 666 667
The escaped character sequence \a, \b, \d, \e, \f, \n, \r, \t, \v,
respectively, stand for the ASCII characters BEL, BS, DEL, ESC, FF, NL,
CR, TAB, VT,

668
**** Regular expressions can be bound to a given language
669 670 671 672
The syntax --regex={LANGUAGE}REGEX means that REGEX is used to make tags
only for files of language LANGUAGE, and ignored otherwise.  This is
particularly useful when storing regexps in a file.

673
**** Regular expressions can be read from a file
674 675 676
The --regex=@regexfile option means read the regexps from a file, one
per line.  Lines beginning with space or tab are ignored.

677 678 679
*** New language parsing features

**** In Perl, packages are tags.
680 681 682 683
Subroutine tags are named from their package.  You can jump to sub tags
as you did before, by the sub name, or additionally by looking for
package::sub.

Francesco Potortì's avatar
etags  
Francesco Potortì committed
684 685 686
**** New language PHP: tags are functions, classes and defines.
If the --members option is specified to etags, tags are vars also.

687
**** New default keywords for TeX.
688 689 690
The new keywords are def, newcommand, renewcommand, newenvironment and
renewenvironment.

Francesco Potortì's avatar
etags  
Francesco Potortì committed
691 692 693 694 695
**** In Makefiles, constants are tagged
If you want the old behaviour instead, thus avoiding to increase the
size of the tags file, use the --no-globals option.

**** In Prolog, etags creates tags for rules in addition to predicates.
696 697 698 699 700 701 702

*** Honour #line directives.
When Etags parses an input file that contains C preprocessor's #line
directives, it creates tags using the file name and line number
specified in those directives.  This is useful when dealing with code
created from Cweb source files.  When Etags tags the generated file, it
writes tags pointing to the source file.
703

704
*** New option --parse-stdin=FILE
705
This option is mostly useful when calling etags from programs.  It can
Francesco Potortì's avatar
Francesco Potortì committed
706
be used (only once) in place of a file name on the command line.  Etags
707 708
will read from standard input and mark the produced tags as belonging to
the file FILE.
709

710
+++
711 712 713
** The command line option --no-windows has been changed to
--no-window-system.  The old one still works, but is deprecated.

714
+++
715 716 717
** The command `list-text-properties-at' has been deleted because
C-u C-x = gives the same information and more.

718
+++
719
** `buffer-menu' and `list-buffers' now list buffers whose names begin
720 721
with a space, when those buffers are visiting files.  Normally buffers
whose names begin with space are omitted.
722

723
+++
724 725 726
** You can now customize fill-nobreak-predicate to control where
filling can break lines.  We provide two sample predicates,
fill-single-word-nobreak-p and fill-french-nobreak-p.
Stefan Monnier's avatar
Stefan Monnier committed
727

728
+++
729 730 731 732
** New user option `add-log-always-start-new-record'.
When this option is enabled, M-x add-change-log-entry will always
start a new record regardless of when the last record is.

733
+++
Stefan Monnier's avatar
Stefan Monnier committed
734 735
** SGML mode has indentation and supports XML syntax.
The new variable `sgml-xml-mode' tells SGML mode to use XML syntax.
736
When this option is enabled, SGML tags are inserted in XML style,
Sam Steingold's avatar
Sam Steingold committed
737
i.e., there is always a closing tag.
Stefan Monnier's avatar
Stefan Monnier committed
738
By default, its setting is inferred on a buffer-by-buffer basis
739
from the file name or buffer contents.
Sam Steingold's avatar
Sam Steingold committed
740

741
+++
Colin Walters's avatar
Colin Walters committed
742 743
** `xml-mode' is now an alias for `smgl-mode', which has XML support.

744
+++
745 746 747 748
** New user option `isearch-resume-enabled'.
This option can be disabled, to avoid the normal behaviour of isearch
which puts calls to `isearch-resume' in the command history.

749
---
Gerd Moellmann's avatar
Gerd Moellmann committed
750 751
** When the *scratch* buffer is recreated, its mode is set from
initial-major-mode, which normally is lisp-interaction-mode,
Sam Steingold's avatar
Sam Steingold committed
752
instead of using default-major-mode.
Gerd Moellmann's avatar
Gerd Moellmann committed
753

754
---
755
** Lisp mode now uses font-lock-doc-face for the docstrings.
Stefan Monnier's avatar
Stefan Monnier committed
756

757 758
---
** Perl mode has a new variable `perl-indent-continued-arguments'.
Stefan Monnier's avatar
Stefan Monnier committed
759

Glenn Morris's avatar
Glenn Morris committed
760
+++
761
** Fortran mode has a new variable `fortran-directive-re'.
Glenn Morris's avatar
Glenn Morris committed
762 763
Adapt this to match the format of any compiler directives you use.
Lines that match are never indented, and are given distinctive font-locking.
Glenn Morris's avatar
Glenn Morris committed
764

765 766
---
** F90 mode has new navigation commands `f90-end-of-block',
Glenn Morris's avatar
Glenn Morris committed
767
`f90-beginning-of-block', `f90-next-block', `f90-previous-block'.
Glenn Morris's avatar
Glenn Morris committed
768

769 770
---
** Prolog mode has a new variable `prolog-font-lock-keywords'
771 772
to support use of font-lock.

773
+++
Stefan Monnier's avatar
Stefan Monnier committed
774 775 776 777
** `special-display-buffer-names' and `special-display-regexps' now
understand two new boolean pseudo-frame-parameters `same-frame' and
`same-window'.

778
+++
Gerd Moellmann's avatar
Gerd Moellmann committed
779 780 781 782
** M-x setenv now expands environment variables of the form `$foo' and
`${foo}' in the specified new value of the environment variable.  To
include a `$' in the value, use `$$'.

783
+++
784 785 786 787 788 789 790
** File-name completion can now ignore directories.
If an element of the list in `completion-ignored-extensions' ends in a
slash `/', it indicates a subdirectory that should be ignored when
completing file names.  Elements of `completion-ignored-extensions'
which do not end in a slash are never considered when a completion
candidate is a directory.

791
+++
792 793
** The completion commands TAB, SPC and ? in the minibuffer apply only
to the text before point.  If there is text in the buffer after point,
794 795
it remains unchanged.

796
+++
Gerd Moellmann's avatar
Gerd Moellmann committed
797 798 799 800
** New user option `inhibit-startup-buffer-menu'.
When loading many files, for instance with `emacs *', Emacs normally
displays a buffer menu.  This option turns the buffer menu off.

801
---
Gerd Moellmann's avatar
Gerd Moellmann committed
802 803
** Rmail now displays 5-digit message ids in its summary buffer.

804
---
805 806 807 808
** On MS Windows, the "system caret" now follows the cursor.
This enables Emacs to work better with programs that need to track
the cursor, for example screen magnifiers and text to speech programs.

809
---
810 811 812
** Tooltips now work on MS Windows.
See the Emacs 21.1 NEWS entry for tooltips for details.

813
---
814
** Some images are now supported on Windows.
Jason Rumney's avatar
Jason Rumney committed
815
PBM and XBM images are supported, other formats which require external
816 817
libraries may be supported in future.

818
---
819 820 821 822 823
** Pointing devices with more than 3 buttons are now supported on MS Windows.
The new variable `w32-pass-extra-mouse-buttons-to-system' controls
whether Emacs should handle the extra buttons itself (the default), or
pass them to Windows to be handled with system-wide functions.

824
+++
825 826 827 828 829 830 831 832
** Under X11, it is possible to swap Alt and Meta (and Super and Hyper).
The new variables `x-alt-keysym', `x-hyper-keysym', `x-meta-keysym',
and `x-super-keysym' can be used to choose which keysyms Emacs should
use for the modifiers.  For example, the following two lines swap
Meta and Alt:
    (setq x-alt-keysym 'meta)
    (setq x-meta-keysym 'alt)

833 834 835 836 837 838
---
** A French translation of the `Emacs Survival Guide' is available.

---
** A French translation of the Emacs Tutorial is available.

Gerd Moellmann's avatar
Gerd Moellmann committed
839 840
** New modes and packages

841
---
842 843 844 845 846
*** The new ido package is an extension of the iswitchb package
to do interactive opening of files and directories in addition to
interactive buffer switching.  Ido is a superset of iswitchb (with a
few exceptions), so don't enable both packages.

847
---
848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887
*** The new cua package provides CUA-like keybindings using C-x for
cut (kill), C-c for copy, C-v for paste (yank), and C-z for undo.
With cua, the region can be set and extended using shifted movement
keys (like pc-selection-mode) and typed text replaces the active
region (like delete-selection-mode).  Do not enable these modes with
cua-mode.  Customize the variable `cua-mode' to enable cua.

In addition, cua provides unified rectangle support with visible
rectangle highlighting: Use S-return to start a rectangle, extend it
using the movement commands (or mouse-3), and cut or copy it using C-x
or C-c (using C-w and M-w also works).

Use M-o and M-c to `open' or `close' the rectangle, use M-b or M-f, to
fill it with blanks or another character, use M-u or M-l to upcase or
downcase the rectangle, use M-i to increment the numbers in the
rectangle, use M-n to fill the rectangle with a numeric sequence (such
as 10 20 30...), use M-r to replace a regexp in the rectangle, and use
M-' or M-/ to restrict command on the rectangle to a subset of the
rows.  See the commentary in cua-base.el for more rectangle commands.

Cua also provides unified support for registers:  Use a numeric
prefix argument between 0 and 9, i.e. M-0 .. M-9, for C-x, C-c, and
C-v to cut or copy into register 0-9, or paste from register 0-9.

The last text deleted (not killed) is automatically stored in
register 0.  This includes text deleted by typing text.

Finally, cua provides a global mark which is set using S-C-space.
When the global mark is active, any text which is cut or copied is
automatically inserted at the global mark position.  See the
commentary in cua-base.el for more global mark related commands.

The features of cua also works with the standard emacs bindings for
kill, copy, yank, and undo.  If you want to use cua mode, but don't
want the C-x, C-c, C-v, and C-z bindings, you may customize the
`cua-enable-cua-keys' variable.

*** The new keypad setup package provides simplified configuration
of the numeric keypad which is available on most keyboards.

888 889 890 891 892 893 894 895 896
*** The new kmacro package provides a simpler user interface to
emacs' keyboard macro facilities.

Basically, it uses two function keys (default F7 and F8) like this:
F7 starts a macro, F8 ends the macro, and pressing F8 again executes
the last macro.  While defining the macro, F7 inserts a counter value
which automatically increments every time the macro is executed.

M-F7 edits the last macro, C-F7 sets the counter, and S-F7 sets the
Juanma Barranquero's avatar
Juanma Barranquero committed
897
counter format. S-F8 executes the previous macro (actually the head of
898 899 900
the keyboard macro ring), and C-F8 cycles through the keyboard macro
ring. C-u F8 swaps the last macro with the head of the macro ring.

Eli Zaretskii's avatar
Eli Zaretskii committed
901 902 903 904 905
+++
*** Calc is now part of the Emacs distribution.

Calc is an advanced desk calculator and mathematical tool written in
Emacs Lisp.  Its documentation is in a separate manual; within Emacs,
906 907
type "C-h i m calc RET" to read that manual.  A reference card is
available in `etc/calccard.tex' and `etc/calccard.ps'.
Eli Zaretskii's avatar
Eli Zaretskii committed
908

909 910 911 912 913
+++
*** The Emacs Lisp Reference Manual is now part of the distribution.

The ELisp reference manual in Info format is built as part of the
Emacs build procedure and installed together with the Emacs User
914 915
Manual.  A menu item was added to the menu bar that makes it easy
accessible (Help->More Manuals->Emacs Lisp Reference).
916

917
+++
Kai Großjohann's avatar
Kai Großjohann committed
918 919 920 921 922 923 924 925 926 927 928 929 930 931 932
*** Tramp is now part of the distribution.

This package is similar to Ange-FTP: it allows you to edit remote
files.  But whereas Ange-FTP uses FTP to access the remote host,
Tramp uses a shell connection.  The shell connection is always used
for filename completion and directory listings and suchlike, but for
the actual file transfer, you can choose between the so-called
`inline' methods (which transfer the files through the shell
connection using base64 or uu encoding) and the `out-of-band' methods
(which invoke an external copying program such as `rcp' or `scp' or
`rsync' to do the copying).

Shell connections can be acquired via `rsh', `ssh', `telnet' and also
`su' and `sudo'.

933
---
934 935 936 937
*** The Introduction to Programming in Emacs Lisp manual is now part of
the distribution.

This manual is now part of the standard distribution and is installed,
938 939 940
together with the Emacs User Manual, into the Info directory.  A menu
item was added to the menu bar that makes it easy accessible
(Help->More Manuals->Introduction to Emacs Lisp).
941

942
---
943 944 945 946 947 948 949 950
*** The new global minor mode `read-file-name-electric-shadow-mode'
modifies the way filenames being entered by the user in the minibuffer are
displayed, so that it's clear when part of the entered filename will be
ignored due to emacs' filename parsing rules.  The ignored portion can be
made dim, invisible, or otherwise less visually noticable.  The display
method may be displayed by customizing the variable
`read-file-name-electric-shadow-properties'.

951
---
Gerd Moellmann's avatar
Gerd Moellmann committed
952 953 954 955 956
*** The ruler-mode.el library provides a minor mode for displaying an
"active" ruler in the header line.  You can use the mouse to visually
change the `fill-column', `window-margins' and `tab-stop-list'
settings.

957
---
958
*** The minor mode Reveal mode makes text visible on the fly as you
Stefan Monnier's avatar
Stefan Monnier committed
959 960 961 962
move your cursor into hidden region of the buffer.
It should work with any package that uses overlays to hide parts
of a buffer, such as outline-minor-mode, hs-minor-mode, hide-ifdef-mode, ...

963
There is also Global Reveal mode which affects all buffers.
Gerd Moellmann's avatar
Gerd Moellmann committed
964

965
---
Colin Walters's avatar
Colin Walters committed
966 967 968
*** The new package ibuffer provides a powerful, completely
customizable replacement for buff-menu.el.

969 970
---
** Support for `magic cookie' standout modes has been removed.
971 972 973 974
Emacs will still work on terminals that require magic cookies in order
to use standout mode, however they will not be able to display
mode-lines in inverse-video.

Dave Love's avatar
Dave Love committed
975 976 977
** The obsolete C mode (c-mode.el) has been removed to avoid problems
with Custom.

Gerd Moellmann's avatar
Gerd Moellmann committed
978

Kim F. Storm's avatar
Kim F. Storm committed
979
* Lisp Changes in Emacs 21.4
980

Dave Love's avatar
Dave Love committed
981 982 983
** New CCL functions `lookup-character' and `lookup-integer' access
hash tables defined by the Lisp function `define-translation-hash-table'.

984 985 986
** There is a new Warnings facility; see the functions `warn'
and `display-warning'.

Stefan Monnier's avatar
Stefan Monnier committed
987 988 989 990 991
** The functions all-completions and try-completion now accept lists
of strings as well as hash-tables additionally to alists, obarrays
and functions.  Furthermore, the function `test-completion' is now
exported to Lisp.

992 993 994
** When pure storage overflows while dumping, Emacs now prints how
much pure storage it will approximately need.

995 996 997 998 999 1000 1001 1002 1003 1004 1005 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
** The new variable `auto-coding-functions' lets you specify functions
to examine a file being visited and deduce the proper coding system
for it.  (If the coding system is detected incorrectly for a specific
file, you can put a `coding:' tags to override it.)

** The variable `safe-local-eval-forms' specifies a list of forms that
are ok to evaluate when they appear in an `eval' local variables
specification.  Normally Emacs asks for confirmation before evaluating
such a form, but if the form appears in this list, no confirmation is
needed.

** If a function has a non-nil `safe-local-eval-function' property,
that means it is ok to evaluate some calls to that function when it
appears in an `eval' local variables specification.  If the property
is t, then any form calling that function with constant arguments is
ok.  If the property is a function or list of functions, they are called
with the form as argument, and if any returns t, the form is ok to call.

If the form is not "ok to call", that means Emacs asks for
confirmation as before.

** Controlling the left and right fringe widths.

The left and right fringe widths can now be controlled by setting the
`left-fringe' and `right-fringe' frame parameters to an integer value
specifying the width in pixels.  Setting the width to 0 effectively
removes the corresponding fringe.

The actual fringe widths may deviate from the specified widths, since
the combined fringe widths must match an integral number of columns.
The extra width is distributed evenly between the left and right fringe.
For force a specific fringe width, specify the width as a negative
integer (if both widths are negative, only the left fringe gets the
specified width).

Setting the width to nil (the default), restores the default fringe
width which is the minimum number of pixels necessary to display any
of the currently defined fringe bitmaps.  The width of the built-in
fringe bitmaps is 8 pixels.

Stefan Monnier's avatar
Stefan Monnier committed
1035
+++
Stefan Monnier's avatar
Stefan Monnier committed
1036 1037 1038 1039 1040 1041 1042
** Renamed file hooks to follow the convention:
find-file-hooks to find-file-hook,
find-file-not-found-hooks to find-file-not-found-functions,
write-file-hooks to write-file-functions,
write-contents-hooks to write-contents-functions.
Marked local-write-file-hooks as obsolete (use the LOCAL arg of `add-hook').

Kim F. Storm's avatar
Kim F. Storm committed
1043 1044 1045 1046 1047 1048 1049 1050 1051
** The `read-file-name' function now takes an additional argument which
specifies a predicate which the file name read must satify.  The
new variable `read-file-name-predicate' contains the predicate argument
while reading the file name from the minibuffer; the predicate in this
variable is used by read-file-name-internal to filter the completion list.

** The new variable `read-file-name-function' can be used by lisp code
to override the internal read-file-name function.

Kim F. Storm's avatar
Kim F. Storm committed
1052 1053 1054 1055
** The new function `read-directory-name' can be used instead of
`read-file-name' to read a directory name; when used, completion
will only show directories.

1056 1057 1058 1059 1060 1061 1062 1063
** The new function `file-remote-p' tests a file name and returns
non-nil if it specifies a remote file (one that Emacs accesses using
its own special methods and not directly through the file system).

** When a Lisp file uses CL functions at run-time, compiling the file
now issues warnings about these calls, unless the file performs
(require 'cl) when loaded.

1064
** The new Lisp library fringe.el controls the apperance of fringes.
Simon Josefsson's avatar
Simon Josefsson committed
1065

Gerd Moellmann's avatar
Gerd Moellmann committed
1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081
** The `defmacro' form may contain declarations specifying how to
indent the macro in Lisp mode and how to debug it with Edebug.  The
syntax of defmacro has been extended to

   (defmacro NAME LAMBDA-LIST [DOC-STRING] [DECLARATION ...] ...)

DECLARATION is a list `(declare DECLARATION-SPECIFIER ...)'.  The
declaration specifiers supported are:

(indent INDENT)
	Set NAME's `lisp-indent-function' property to INDENT.

(edebug DEBUG)
	Set NAME's `edebug-form-spec' property to DEBUG.  (This is
	equivalent to writing a `def-edebug-spec' for the macro.

Kim F. Storm's avatar
Kim F. Storm committed
1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103
** Interactive commands can be remapped through keymaps.

This is an alternative to using defadvice or substitute-key-definition
to modify the behaviour of a key binding using the normal keymap
binding and lookup functionality.

When a key sequence is bound to a command, and that command is
remapped to another command, that command is run instead of the
original command.

Example:
Suppose that minor mode my-mode has defined the commands
my-kill-line and my-kill-word, and it wants C-k (and any other key
bound to kill-line) to run the command my-kill-line instead of
kill-line, and likewise it wants to run my-kill-word instead of
kill-word.

Instead of rebinding C-k and the other keys in the minor mode map,
command remapping allows you to directly map kill-line into
my-kill-line and kill-word into my-kill-word through the minor mode
map using define-key:

1104 1105
   (define-key my-mode-map [remap kill-line] 'my-kill-line)
   (define-key my-mode-map [remap kill-word] 'my-kill-word)
Kim F. Storm's avatar
Kim F. Storm committed
1106 1107 1108 1109 1110 1111 1112 1113 1114 1115

Now, when my-mode is enabled, and the user enters C-k or M-d,
the commands my-kill-line and my-kill-word are run.

Notice that only one level of remapping is supported.  In the above
example, this means that if my-kill-line is remapped to other-kill,
then C-k still runs my-kill-line.

The following changes have been made to provide command remapping:

1116 1117 1118 1119
- Command remappings are defined using `define-key' with a prefix-key
  `remap', i.e. `(define-key MAP [remap CMD] DEF)' remaps command CMD
  to definition DEF in keymap MAP.  The definition is not limited to
  another command; it can be anything accepted for a normal binding.
Kim F. Storm's avatar
Kim F. Storm committed
1120

1121 1122
- The new function `remap-command' returns the binding for a remapped
  command in the current keymaps, or nil if it isn't remapped.
Kim F. Storm's avatar
Kim F. Storm committed
1123 1124

- key-binding now remaps interactive commands unless the optional
1125
  third argument NO-REMAP is non-nil.
Kim F. Storm's avatar
Kim F. Storm committed
1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137

- where-is-internal now returns nil for a remapped command (e.g.
  kill-line if my-mode is enabled), and the actual key binding for
  the command it is remapped to (e.g. C-k for my-kill-line).
  It also has a new optional fifth argument, NO-REMAP, which inhibits
  remapping if non-nil (e.g. it returns C-k for kill-line and
  <kill-line> for my-kill-line).

- The new variable `this-original-command' contains the original
  command before remapping.  It is equal to `this-command' when the
  command was not remapped.

1138 1139 1140 1141 1142 1143
** New variable emulation-mode-map-alists.

Lisp packages using many minor mode keymaps can now maintain their own
keymap alist separate from minor-mode-map-alist by adding their keymap
alist to this list.

1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200
** Atomic change groups.

To perform some changes in the current buffer "atomically" so that
they either all succeed or are all undone, use `atomic-change-group'
around the code that makes changes.  For instance:

  (atomic-change-group
    (insert foo)
    (delete-region x y))

If an error (or other nonlocal exit) occurs inside the body of
`atomic-change-group', it unmakes all the changes in that buffer that
were during the execution of the body.  The change group has no effect
on any other buffers--any such changes remain.

If you need something more sophisticated, you can directly call the
lower-level functions that `atomic-change-group' uses.  Here is how.

To set up a change group for one buffer, call `prepare-change-group'.
Specify the buffer as argument; it defaults to the current buffer.
This function returns a "handle" for the change group.  You must save
the handle to activate the change group and then finish it.

Before you change the buffer again, you must activate the change
group.  Pass the handle to `activate-change-group' afterward to
do this.

After you make the changes, you must finish the change group.  You can
either accept the changes or cancel them all.  Call
`accept-change-group' to accept the changes in the group as final;
call `cancel-change-group' to undo them all.

You should use `unwind-protect' to make sure the group is always
finished.  The call to `activate-change-group' should be inside the
`unwind-protect', in case the user types C-g just after it runs.
(This is one reason why `prepare-change-group' and
`activate-change-group' are separate functions.)  Once you finish the
group, don't use the handle again--don't try to finish the same group
twice.

To make a multibuffer change group, call `prepare-change-group' once
for each buffer you want to cover, then use `nconc' to combine the
returned values, like this:

  (nconc (prepare-change-group buffer-1)
         (prepare-change-group buffer-2))

You can then activate the multibuffer change group with a single call
to `activate-change-group', and finish it with a single call to
`accept-change-group' or `cancel-change-group'.

Nested use of several change groups for the same buffer works as you
would expect.  Non-nested use of change groups for the same buffer
will lead to undesirable results, so don't let it happen; the first
change group you start for any given buffer should be the last one
finished.

Colin Walters's avatar
Colin Walters committed
1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215
+++
** New variable char-property-alias-alist.

This variable allows you to create alternative names for text
properties.  It works at the same level as `default-text-properties',
although it applies to overlays as well.  This variable was introduced
to implement the `font-lock-face' property.

** New special text property `font-lock-face'.

This property acts like the `face' property, but it is controlled by
M-x font-lock-mode.  It is not, strictly speaking, a builtin text
property.  Instead, it is implemented inside font-core.el, using the
new variable `char-property-alias-alist'.

1216 1217 1218 1219 1220 1221
** New function remove-list-of-text-properties.

The new function `remove-list-of-text-properties' is almost the same
as `remove-text-properties'.  The only difference is that it takes
a list of property names as argument rather than a property list.

Kim F. Storm's avatar
Kim F. Storm committed
1222 1223 1224 1225 1226 1227 1228
** New functions insert-for-yank and insert-buffer-substring-as-yank.

These functions work like `insert' and `insert-buffer-substring', but
removes the text properties in the `yank-excluded-properties' list.

** New function insert-buffer-substring-no-properties.

1229 1230 1231 1232 1233 1234 1235
** New function display-supports-face-attributes-p may be used to test
whether a given set of face attributes is actually displayable.

A new predicate `supports' has also been added to the `defface' face
specification language, which can be used to do this test for faces
defined with defface.

1236 1237 1238 1239 1240 1241 1242
** face-attribute, face-foreground, face-background, and face-stipple now
accept a new optional argument, INHERIT, which controls how face
inheritance is used when determining the value of a face attribute.

** New functions face-attribute-relative-p and merge-face-attribute
help with handling relative face attributes.

1243
** Enhanced networking support.
1244

1245 1246 1247
*** There is a new `make-network-process' function which supports
opening of stream and datagram connections to a server, as well as
create a stream or datagram server inside emacs.
1248

1249
- A server is started using :server t arg.
1250
- Datagram connection is selected using :type 'datagram arg.
1251 1252 1253
- A server can open on a random port using :service t arg.
- Local sockets are supported using :family 'local arg.
- Non-blocking connect is supported using :nowait t arg.
1254

1255 1256 1257
To test for the availability of a given feature, use featurep like this:
  (featurep 'make-network-process '(:type datagram))

1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268
*** Original open-network-stream is now emulated using make-network-process.

*** New function open-network-stream-nowait.

This function initiates a non-blocking connect and returns immediately
before the connection is established.  The filter and sentinel
functions can be specified as arguments to open-network-stream-nowait.
When the non-blocking connect completes, the sentinel is called with
the status matching "open" or "failed".

*** New function open-network-stream-server.
1269
MORE INFO NEEDED HERE.
1270 1271

*** New functions process-datagram-address and set-process-datagram-address.
1272
MORE INFO NEEDED HERE.
1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293

*** By default, the function process-contact still returns (HOST SERVICE)
for a network process.  Using the new optional KEY arg, the complete list
of network process properties or a specific property can be selected.

Using :local and :remote as the KEY, the address of the local or
remote end-point is returned.  An Inet address is represented as a 5
element vector, where the first 4 elements contain the IP address and
the fifth is the port number.

*** Network processes can now be stopped and restarted with
`stop-process' and `continue-process'.  For a server process, no
connections are accepted in the stopped state.  For a client process,
no input is received in the stopped state.

*** Function list-processes now has an optional argument; if non-nil,
only the processes whose query-on-exit flag is set are listed.

*** New set-process-query-on-exit-flag and process-query-on-exit-flag
functions.  The existing process-kill-without-query function is still
supported, but new code should use the new functions.
1294

Colin Walters's avatar
Colin Walters committed
1295 1296
** New function copy-tree.

1297 1298
** New function substring-no-properties.

Kim F. Storm's avatar
Kim F. Storm committed
1299 1300
** New function minibuffer-selected-window.

1301 1302
** New function `call-process-shell-command'.

1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315
** The dummy function keys made by easymenu
are now always lower case.  If you specify the
menu item name "Ada", for instance, it uses `ada'
as the "key" bound by that key binding.

This is relevant only if Lisp code looks for
the bindings that were made with easymenu.

** The function `commandp' takes an additional optional
argument.  If it is non-nil, then `commandp' checks
for a function that could be called with `call-interactively',
and does not return t for keyboard macros.

1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335
** master-mode.el implements a minor mode for scrolling a slave
buffer without leaving your current buffer, the master buffer.

It can be used by sql.el, for example: the SQL buffer is the master
and its SQLi buffer is the slave.  This allows you to scroll the SQLi
buffer containing the output from the SQL buffer containing the
commands.

This is how to use sql.el and master.el together: the variable
sql-buffer contains the slave buffer.  It is a local variable in the
SQL buffer.

(add-hook 'sql-mode-hook
   (function (lambda ()
	       (master-mode t)
	       (master-set-slave sql-buffer))))
(add-hook 'sql-set-sqli-hook
   (function (lambda ()
	       (master-set-slave sql-buffer))))

1336 1337 1338 1339 1340
** File local variables.

A file local variables list cannot specify a string with text
properties--any specified text properties are discarded.

1341 1342 1343 1344 1345
+++
*** The meanings of scroll-up-aggressively and scroll-down-aggressively
have been interchanged, so that the former now controls scrolling up,
and the latter now controls scrolling down.

1346 1347 1348 1349 1350 1351
+++
** New function window-body-height.

This is like window-height but does not count the mode line
or the header line.