NEWS 423 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 12 13
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

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

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

19 20 21 22
** Emacs now supports new configure options `--program-prefix',
`--program-suffix' and `--program-transform-name' that affect the names of
installed programs.

Colin Walters's avatar
Colin Walters committed
23
** By default, Emacs now uses a setgid helper program to update game
Colin Walters's avatar
Colin Walters committed
24 25 26 27
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
28 29
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
30

31 32 33 34 35
---
** 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
36 37 38
---
** Support for AIX 5.1 was added.

39
---
Gerd Moellmann's avatar
Gerd Moellmann committed
40 41
** Support for FreeBSD/Alpha has been added.

42 43 44
---
** Support for BSD/OS 5.0 was added.

45 46 47
---
** Support for GNU/Linux systems on S390 machines was added.

Eli Zaretskii's avatar
Eli Zaretskii committed
48 49 50 51
---
** Support for MacOS X was added.
See the files mac/README and mac/INSTALL for build instructions.

Andreas Schwab's avatar
Andreas Schwab committed
52
** Support for GNU/Linux systems on X86-64 machines was added.
Gerd Moellmann's avatar
Gerd Moellmann committed
53

Kim F. Storm's avatar
Kim F. Storm committed
54
* Changes in Emacs 21.4
Stefan Monnier's avatar
Stefan Monnier committed
55

Simon Josefsson's avatar
Simon Josefsson committed
56 57 58 59 60
** The appearance of the fringes can now be customized, using either
the global command M-x fringe-mode, the frame specific command M-x
set-fringe-style, the Show/Hide submenu of the top-level Options menu,
or customizing the `fringe-mode' variable.

61 62 63 64 65
** 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
"~/".

66 67 68 69 70 71 72
---
** 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
73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93
---
** 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.

94 95 96 97
** The commands M-x customize-face and M-x customize-face-other-window
now look at the text at point.  If that text has a face specified,
the commands suggest to customize that face.

Stefan Monnier's avatar
Stefan Monnier committed
98 99 100 101 102
** Limited support for charset unification has been added.
By default, Emacs now knows how to translate latin-N chars between their
charset and some other latin-N charset or unicode.  You can force a
more complete unification by calling (unify-8859-on-decoding-mode 1).

103
---
Stefan Monnier's avatar
Stefan Monnier committed
104 105 106 107
** The scrollbar under Motif has a smoother drag-scrolling.
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).

108 109 110 111 112 113
+++
** 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.

114 115 116 117 118 119 120 121
** 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
122 123 124 125
---
** PO translation files are decoded according to their MIME headers
when Emacs visits them.

126
---
127 128 129 130 131 132
** 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.

Kim F. Storm's avatar
Kim F. Storm committed
133 134 135
** On X and MS Windows, the blinking cursor's "off" state is now shown
as a hollow box or a thin bar.

136
+++
137
** Emacs now supports compound-text Extended Segments in X selections.
138 139 140

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
141 142
part of the list of approved standard encodings defined by the ICCCM
spec.  Examples of such non-standard encodings include ISO 8859-14, ISO
143 144 145 146
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'.
147

148 149
+++
** The parameters of automatic hscrolling can now be customized.
150 151 152
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.
153

154 155 156 157 158 159 160
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.

161
+++
162 163 164 165 166
** 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.

167 168 169
+++
** The variable `automatic-hscrolling' was renamed to `auto-hscroll-mode'.
The old name is still available as an alias.
170

171
+++
172
** New display feature: focus follows mouse.  If you set the variable
173 174 175 176
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
177

Eli Zaretskii's avatar
Eli Zaretskii committed
178 179 180 181 182
** The new command `describe-text-at' pops up a buffer with description
of text properties, overlays, and widgets at point, and lets you get
more information about them, by clicking on mouse-sensitive areas or
moving there and pressing RET.

Colin Walters's avatar
Colin Walters committed
183 184 185 186 187 188 189
+++
** 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.

190
+++
Richard M. Stallman's avatar
Richard M. Stallman committed
191 192 193 194 195
** 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.
196

197
+++
Stefan Monnier's avatar
Stefan Monnier committed
198 199 200 201 202 203
** 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.

204 205 206 207 208 209
+++
** 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
210
+++
211 212 213 214
** 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.

215 216 217
The new variable `mode-line-in-non-selected-windows' controls whether
the `mode-line-inactive' face is used.

Pavel Janík's avatar
Pavel Janík committed
218 219 220
** A menu item "Show/Hide" was added to the top-level menu "Options".
This menu allows you to turn various display features on and off (like
tool bar and the menu bar itself).  You can also move the vertical
Pavel Janík's avatar
Pavel Janík committed
221 222 223
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
224

225 226
** Speedbar has moved from the "Tools" top level menu to "Show/Hide".

227 228 229
+++
** 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
230
`display-time-mail-directory'.
231

232 233 234 235 236 237 238 239 240 241 242 243
+++
** 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.

244 245 246
---
** LDAP support now defaults to ldapsearch from OpenLDAP version 2.

247
+++
248
** You can now disable pc-selection-mode after enabling it.
249
M-x pc-selection-mode behaves like a proper minor mode, and with no
250 251 252 253 254
argument it toggles the mode.

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

Colin Walters's avatar
Colin Walters committed
255 256 257 258 259 260
** 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').

261 262
** Changes in support of colors on character terminals

263
+++
264
*** The new command-line option --color=MODE lets you specify a standard
265 266 267 268 269 270 271 272 273
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.

274 275 276 277 278 279 280 281 282 283
---
*** 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.

284 285 286 287 288 289
+++
** 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
290
screen size.  (For now, this does not work with some window managers.)
291

Stefan Monnier's avatar
Stefan Monnier committed
292 293
** Info-index finally offers completion.

Colin Walters's avatar
Colin Walters committed
294 295
** shell-mode now supports programmable completion using `pcomplete'.

Colin Walters's avatar
Colin Walters committed
296
** Emacs now tries to set up buffer coding systems for HTML/XML files
Colin Walters's avatar
Colin Walters committed
297
automatically.  This is accomplished using the general mechanism of a
Colin Walters's avatar
Colin Walters committed
298 299 300
new variable called `auto-coding-functions', which you may add to.  If
the coding system is detected incorrectly, you may use coding: tags to
override them.
Colin Walters's avatar
Colin Walters committed
301

302 303 304 305 306
** 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.

307 308 309 310
** 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
311 312 313
specifying the width in pixels.  Setting the width to 0 effectively
removes the corresponding fringe.

314 315 316 317 318
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
319
specified width).
320

321 322 323 324 325
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.

326 327 328 329 330 331 332 333 334 335 336 337 338
** 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
339 340 341 342 343 344 345 346 347 348
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
349
to new-kill-line, these commands now report:
Kim F. Storm's avatar
Kim F. Storm committed
350 351 352 353 354 355 356 357 358 359

- 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

360 361 362 363 364
** 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'.

365 366 367 368 369
** 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.

Colin Walters's avatar
Colin Walters committed
370 371 372 373 374 375
** 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'.

** The Emacs Lisp byte-compiler now displays the actual line and
Colin Walters's avatar
Colin Walters committed
376 377 378
character position of errors, where possible.  Additionally, the form
of its warning and error messages have been brought more in line with
the output of other GNU tools.
Colin Walters's avatar
Colin Walters committed
379

380 381 382 383 384 385 386 387 388 389 390 391 392 393 394
** 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.

** 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.

395 396 397
** In GUD mode when talking to GDB, C-x C-a C-j "jumps" the program
counter to the specified source line (the one where point is).

398
** GUD mode improvements for jdb:
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

*** 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.

Stefan Monnier's avatar
Stefan Monnier committed
434 435 436 437
** 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.

438 439 440 441
** 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
442
doublequotes make no difference in the shell, but they prevent
443 444
special treatment in `dired-do-shell-command'.

445 446 447 448
** 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.

Stefan Monnier's avatar
Stefan Monnier committed
449 450 451 452 453
** 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.

Stefan Monnier's avatar
Stefan Monnier committed
454
** jit-lock can now be delayed with `jit-lock-defer-time'.
455 456

If this variable is non-nil, its value should be the amount of Emacs
457
idle time in seconds to wait before starting fontification.  For
458 459
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
460

461 462 463 464 465 466 467
+++
** 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
468

469 470 471 472 473 474 475
** 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
ways you can enable Transient Mark mode temporarily, and activate the
mark, for one command only.

476 477 478 479 480 481
One is to type C-SPC C-SPC; this also sets the mark.  The other is to
type C-u C-x C-x, which does not alter the region.

After these commands, Transient Mark mode remains enabled
until you deactivate the mark--typically with a command that
alters the buffer, or typing C-g.
482 483 484 485 486

** 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.

487 488 489
** 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.
490 491 492 493 494

** 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
495
+++
496 497
** M-h (mark-paragraph) now accepts a prefix arg.
With positive arg, M-h marks the current and the following paragraphs;
498 499
if the arg is negative, it marks the current and the preceding
paragraphs.
Kai Großjohann's avatar
Kai Großjohann committed
500

501 502 503
** In Dired, the w command now copies the current line's file name
into the kill ring.

504 505 506 507 508
** 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.

Stefan Monnier's avatar
Stefan Monnier committed
509 510 511
** mouse-wheels can now scroll a specific fraction of the window
(rather than a fixed number of lines) and the scrolling is `progressive'.

Stefan Monnier's avatar
Stefan Monnier committed
512 513
** 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
514 515
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
516 517 518 519 520

	(set-keyboard-coding-system nil)

to your .emacs to revert to the old behavior.

Werner LEMBERG's avatar
Werner LEMBERG committed
521 522 523 524
** 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.

525 526
+++
** Emacs now reads the standard abbrevs file ~/.abbrev_defs
527 528 529
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
530
according to the value of `save-abbrevs'.
531

532 533 534
** 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
535

536 537 538
** The default values of `tooltip-delay' and `tooltip-hide-delay'
were changed.

539 540 541
** On terminals whose erase-char is ^H (Backspace), Emacs
now uses normal-erase-is-backspace-mode.

542 543 544 545
** 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).

546 547 548 549 550 551 552 553 554
** VC Changes

*** 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.

555 556
** EDiff changes.

Michael Kifer's avatar
Michael Kifer committed
557
+++
558 559 560 561 562
***  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
563
+++
564 565 566 567 568 569
*** 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.

570 571
** Etags changes.

572 573 574
*** New regular expressions features

**** New syntax for regular expressions, multi-line regular expressions.
575 576 577 578 579
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'
580 581 582 583 584 585
(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.

586
**** Regular expressions can use char escape sequences as in Gcc
587 588 589 590
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,

591
**** Regular expressions can be bound to a given language
592 593 594 595
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.

596
**** Regular expressions can be read from a file
597 598 599
The --regex=@regexfile option means read the regexps from a file, one
per line.  Lines beginning with space or tab are ignored.

600 601 602
*** New language parsing features

**** In Prolog, etags creates tags for rules in addition to predicates.
603

604
**** In Perl, packages are tags.
605 606 607 608
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.

609
**** New default keywords for TeX.
610 611 612
The new keywords are def, newcommand, renewcommand, newenvironment and
renewenvironment.

613
**** New language PHP: tags are functions, classes and defines.
614 615 616 617 618 619 620 621
If the --members option is specified to etags, tags are vars also.

*** 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.
622

623
*** New option --parse-stdin=FILE
624
This option is mostly useful when calling etags from programs.  It can
Francesco Potortì's avatar
Francesco Potortì committed
625
be used (only once) in place of a file name on the command line.  Etags
626 627
will read from standard input and mark the produced tags as belonging to
the file FILE.
628

629
+++
630 631 632
** The command line option --no-windows has been changed to
--no-window-system.  The old one still works, but is deprecated.

633 634 635
** The command `list-text-properties-at' has been deleted because
C-u C-x = gives the same information and more.

636
** `buffer-menu' and `list-buffers' now list buffers whose names begin
637 638
with a space, if they visit files.

639 640 641
** 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
642

643 644 645 646
** 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.

647 648
** New user option `sgml-xml'.
When this option is enabled, SGML tags are inserted in XML style,
Sam Steingold's avatar
Sam Steingold committed
649
i.e., there is always a closing tag.
650 651
When not customized, it becomes buffer-local when it can be inferred
from the file name or buffer contents.
Sam Steingold's avatar
Sam Steingold committed
652

Colin Walters's avatar
Colin Walters committed
653 654
** `xml-mode' is now an alias for `smgl-mode', which has XML support.

655 656 657 658
** 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.

659
---
Gerd Moellmann's avatar
Gerd Moellmann committed
660 661
** 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
662
instead of using default-major-mode.
Gerd Moellmann's avatar
Gerd Moellmann committed
663

664
---
Stefan Monnier's avatar
Stefan Monnier committed
665
** Lisp-mode now uses font-lock-doc-face for the docstrings.
Stefan Monnier's avatar
Stefan Monnier committed
666 667 668

** perl-mode has a new variable `perl-indent-continued-arguments'.

Glenn Morris's avatar
Glenn Morris committed
669
** fortran-mode has a new variable `fortran-directive-re'.
Glenn Morris's avatar
Glenn Morris committed
670

Glenn Morris's avatar
Glenn Morris committed
671
** f90-mode has new navigation commands `f90-end-of-block',
Glenn Morris's avatar
Glenn Morris committed
672
`f90-beginning-of-block', `f90-next-block', `f90-previous-block'.
Glenn Morris's avatar
Glenn Morris committed
673

674 675 676
** prolog-mode has a new variable `prolog-font-lock-keywords'
to support use of font-lock.

Stefan Monnier's avatar
Stefan Monnier committed
677 678 679 680
** `special-display-buffer-names' and `special-display-regexps' now
understand two new boolean pseudo-frame-parameters `same-frame' and
`same-window'.

Gerd Moellmann's avatar
Gerd Moellmann committed
681 682 683 684 685 686 687
** When pure storage overflows while dumping, Emacs now prints how
much pure storage it will approximately need.

** 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 `$$'.

688
+++
689 690 691 692 693 694 695
** 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.

696
+++
Gerd Moellmann's avatar
Gerd Moellmann committed
697 698 699 700
** 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.

701
---
Gerd Moellmann's avatar
Gerd Moellmann committed
702 703
** Rmail now displays 5-digit message ids in its summary buffer.

Gerd Moellmann's avatar
Gerd Moellmann committed
704 705 706 707
** When using M-x revert-buffer in a compilation buffer to rerun a
compilation, it is now made sure that the compilation buffer is reused
in case it has been renamed.

708
---
709 710 711 712
** 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.

713
---
714 715 716
** Tooltips now work on MS Windows.
See the Emacs 21.1 NEWS entry for tooltips for details.

717
---
718
** Some images are now supported on Windows.
Jason Rumney's avatar
Jason Rumney committed
719
PBM and XBM images are supported, other formats which require external
720 721
libraries may be supported in future.

722 723 724 725 726
** 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.

727 728 729 730 731 732 733 734
** 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)

735 736 737 738 739 740
---
** A French translation of the `Emacs Survival Guide' is available.

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

741 742 743 744
** When emacs is configured to use `xaw3d' scroll-bars, emacs will
tell the scroll-bar library which colors to use for the bevels, to
prevent the library from using dithering.

Gerd Moellmann's avatar
Gerd Moellmann committed
745 746
** New modes and packages

747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786
*** 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.

Eli Zaretskii's avatar
Eli Zaretskii committed
787 788 789 790 791
+++
*** 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,
792 793
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
794

795 796 797 798 799
+++
*** 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
800 801
Manual.  A menu item was added to the menu bar that makes it easy
accessible (Help->More Manuals->Emacs Lisp Reference).
802

803 804 805 806 807 808 809 810 811 812 813 814
---
** Indentation of simple and extended loop forms has been added to the
cl-indent package.  The new user options
`lisp-loop-keyword-indentation', `lisp-loop-forms-indentation', and
`lisp-simple-loop-indentation' can be used to customize the
indentation of keywords and forms in loop forms.

---
** Indentation of backquoted forms has been made customizable in the
cl-indent package.  See the new user option `lisp-backquote-indentation'.

---
815 816 817 818
*** 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,
819 820 821
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).
822

823 824 825 826 827 828 829 830
*** 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'.

Gerd Moellmann's avatar
Gerd Moellmann committed
831 832 833 834 835
*** 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.

836
*** The minor mode Reveal mode makes text visible on the fly as you
Stefan Monnier's avatar
Stefan Monnier committed
837 838 839 840
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, ...

841
There is also Global Reveal mode which affects all buffers.
Gerd Moellmann's avatar
Gerd Moellmann committed
842

843
---
Colin Walters's avatar
Colin Walters committed
844 845 846
*** The new package ibuffer provides a powerful, completely
customizable replacement for buff-menu.el.

847 848
---
** Support for `magic cookie' standout modes has been removed.
849 850 851 852
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.

Gerd Moellmann's avatar
Gerd Moellmann committed
853

Kim F. Storm's avatar
Kim F. Storm committed
854
* Lisp Changes in Emacs 21.4
855

Kim F. Storm's avatar
Kim F. Storm committed
856 857 858 859 860 861 862 863 864
** 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
865 866 867 868
** 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.

Simon Josefsson's avatar
Simon Josefsson committed
869 870
** The New lisp library fringe.el controls the apperance of fringes.

Gerd Moellmann's avatar
Gerd Moellmann committed
871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886
** 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
887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908
** 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:

909 910
   (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
911 912 913 914 915 916 917 918 919 920

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:

921 922 923 924
- 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
925

926 927
- 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
928 929

- key-binding now remaps interactive commands unless the optional
930
  third argument NO-REMAP is non-nil.
Kim F. Storm's avatar
Kim F. Storm committed
931 932 933 934 935 936 937 938 939 940 941 942

- 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.

943 944 945 946 947 948
** 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.

949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005
** 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
1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020
+++
** 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'.

1021 1022 1023 1024 1025 1026
** 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
1027 1028 1029 1030 1031 1032 1033
** 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.

1034 1035 1036 1037 1038 1039 1040
** 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.

1041
** Enhanced networking support.
1042

1043 1044 1045
*** 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.
1046

1047
- A server is started using :server t arg.
1048
- Datagram connection is selected using :type 'datagram arg.
1049 1050 1051
- 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.
1052

1053 1054 1055
To test for the availability of a given feature, use featurep like this:
  (featurep 'make-network-process '(:type datagram))

1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066
*** 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.
1067
MORE INFO NEEDED HERE.
1068 1069

*** New functions process-datagram-address and set-process-datagram-address.
1070
MORE INFO NEEDED HERE.
1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091

*** 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.
1092

Colin Walters's avatar
Colin Walters committed
1093 1094
** New function copy-tree.

1095 1096
** New function substring-no-properties.

Kim F. Storm's avatar
Kim F. Storm committed
1097 1098
** New function minibuffer-selected-window.

1099 1100
** New function `call-process-shell-command'.

1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113
** 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.

1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133
** 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))))

1134 1135 1136 1137 1138
** File local variables.

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

1139 1140 1141 1142 1143
+++
*** 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.

1144 1145 1146 1147 1148 1149
+++
** New function window-body-height.

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

Kim F. Storm's avatar
Kim F. Storm committed
1150 1151 1152 1153 1154
** New function format-mode-line.

This returns the mode-line or header-line of the selected (or a
specified) window as a string without text properties.

1155 1156 1157 1158 1159
** New functions `lax-plist-get' and `lax-plist-put'.

These functions are like `plist-get' and `plist-put' except that they
compare the property name using `equal' rather than `eq'.

1160 1161 1162 1163 1164 1165 1166
** New function `tool-bar-local-item-from-menu'

The `tool-bar-add-item-from-menu' most not be used (as previously
recommended) for making entries in the tool bar for local keymaps.
Instead, use the function `tool-bar-local-item-from-menu', which lets
you specify the map to use as an argument.

1167 1168 1169 1170 1171 1172 1173
+++
** The function `atan' now accepts an optional second argument.

When called with 2 arguments, as in `(atan Y X)', `atan' returns the
angle in radians between the vector [X, Y] and the X axis.  (This is
equivalent to the standard C library function `atan2'.)

1174 1175 1176 1177 1178 1179 1180 1181 1182
+++
** You can now make a window as short as one line.

A window that is just one line tall does not display either a mode
line or a header line, even if the variables `mode-line-format' and
`header-line-format' call for them.  A window that is two lines tall
cannot display both a mode line and a header line at once; if the
variables call for both, only the mode line actually appears.

1183 1184 1185 1186 1187 1188
+++
** The new frame parameter `tty-color-mode' specifies the mode to use
for color support on character terminal frames.  Its value can be a
number of colors to support, or a symbol.  See the Emacs Lisp
Reference manual for more detailed documentation.

1189 1190 1191
** Mode line display ignores text properties in the value
of a variable whose `risky-local-variables' property is nil.

1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206
** Already true in Emacs 21.1, but not emphasized clearly enough:

Multibyte buffers can now faithfully record all 256 character codes
from 0 to 255.  As a result, most of the past reasons to use unibyte
buffers no longer exist.  We only know of three reasons to use them
now:

1. If you prefer to use unibyte text all of the time.

2. For reading files into temporary buffers, when you want to avoid
the time it takes to convert the format.

3. For binary files where format conversion would be pointless and
wasteful.

1207 1208 1209
** If text has a `keymap' property, that keymap takes precedence
over minor mode keymaps.

1210 1211 1212
** A hex escape in a string forces the string to be multibyte.
An octal escape makes it unibyte.

Miles Bader's avatar
Miles Bader committed
1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227
** Only one of the beginning or end of an invisible, intangible region is
considered an acceptable value for point; which one is determined by
examining how the invisible/intangible properties are inherited when new
text is inserted adjacent to them.  If text inserted at the beginning would
inherit the invisible/intangible properties, then that position is
considered unacceptable, and point is forced to the position following the
invisible/intangible text.  If text inserted at the end would inherit the
properties, then the opposite happens.

Thus, point can only go to one end of an invisible, intangible region, but
not the other one.  This prevents C-f and C-b from appearing to stand still
on the screen.

** field-beginning and field-end now accept an additional optional
argument, LIMIT.
1228

1229
+++
1230 1231 1232 1233 1234 1235
** define-abbrev now accepts an optional argument SYSTEM-FLAG.  If
non-nil, this marks the abbrev as a "system" abbrev, which means that
it won't be stored in the user's abbrevs file if he saves the abbrevs.
Major modes that predefine some abbrevs should always specify this
flag.

Pavel Janík's avatar
Pavel Janík committed
1236 1237 1238 1239
** Support for Mocklisp has been removed.

** The function insert-string is now obsolete.

Stefan Monnier's avatar
Stefan Monnier committed
1240 1241 1242 1243 1244 1245 1246
** The precedence of file-name-handlers has been changed.
Instead of blindly choosing the first handler that matches,
find-file-name-handler now gives precedence to a file-name handler
that matches near the end of the file name.  More specifically, the
handler whose (match-beginning 0) is the largest is chosen.
In case of ties, the old "first matched" rule applies.

Stefan Monnier's avatar
Stefan Monnier committed
1247
** Dense keymaps now handle inheritance correctly.
Stefan Monnier's avatar
Stefan Monnier committed
1248 1249
Previously a dense keymap would hide all of the simple-char key
bindings of the parent keymap.
Stefan Monnier's avatar
Stefan Monnier committed
1250

Stefan Monnier's avatar
Stefan Monnier committed
1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268
** jit-lock obeys a new text-property `jit-lock-defer-multiline'.
If a piece of text with that property gets contextually refontified
(see jit-lock-defer-contextually), then all of that text will
be refontified.  This is useful when the syntax of a textual element
depends on text several lines further down (and when font-lock-multiline
is not appropriate to solve that problem).  For example in Perl:

	s{
		foo
	}{
		bar
	}e

Adding/removing the last `e' changes the `bar' from being a piece of
text to being a piece of code, so you'd put a jit-lock-defer-multiline
property over the second half of the command to force (deferred)
refontification of `bar' whenever the `e' is added/removed.

Stefan Monnier's avatar
Stefan Monnier committed
1269
** describe-vector now takes a second argument `describer' which is
1270
called to print the entries' values.  It defaults to `princ'.
Stefan Monnier's avatar
Stefan Monnier committed
1271

Miles Bader's avatar
Miles Bader committed
1272 1273 1274 1275
** 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.

Stefan Monnier's avatar
Stefan Monnier committed
1276 1277 1278 1279 1280 1281
** defcustom and other custom declarations now use a default group
(the last group defined in the same file) when no :group was given.

** emacsserver now runs pre-command-hook and post-command-hook when
it receives a request from emacsclient.

1282 1283 1284 1285 1286 1287 1288
** The variable `recursive-load-depth-limit' has been deleted.
Emacs now signals an error if the same file is loaded with more
than 3 levels of nesting.

** The default values of paragraph-start and indent-line-function have
been changed to reflect those used in Text mode rather than those used
in Indented-Text mode.
Stefan Monnier's avatar
Stefan Monnier committed
1289

1290 1291 1292 1293 1294 1295 1296 1297
** If a major mode function has a non-nil `no-clone-indirect'
property, `clone-indirect-buffer' signals an error if you use
it in that buffer.

** If you set `query-replace-skip-read-only' non-nil,
`query-replace' and related functions simply ignore
a match if part of it has a read-only property.

Eli Zaretskii's avatar
Eli Zaretskii committed
1298
** In `replace-match', the replacement text no longer inherits
Eli Zaretskii's avatar
Eli Zaretskii committed
1299
properties from surrounding text.
1300

1301 1302 1303 1304 1305 1306 1307
** New function `buffer-local-value'.

- Function: buffer-local-value variable buffer

This function returns the buffer-local binding of VARIABLE (a symbol)
in buffer BUFFER.  If VARIABLE does not have a buffer-local binding in
buffer BUFFER, it returns the default value of VARIABLE instead.
Gerd Moellmann's avatar
Gerd Moellmann committed
1308

1309 1310 1311
** The default value of `paragraph-start' and `indent-line-function' has
been changed to reflect the one used in Text mode rather than the one
used in Indented Text mode.
Stefan Monnier's avatar
Stefan Monnier committed
1312 1313 1314 1315 1316 1317 1318

** New function `text-clone-create'.  Text clones are chunks of text
that are kept identical by transparently propagating changes from one
clone to the other.

** font-lock can manage arbitrary text-properties beside `face'.
*** the FACENAME returned in font-lock-keywords can be a list
Stefan Monnier's avatar
Typo.  
Stefan Monnier committed
1319
of the form (face FACE PROP1 VAL1 PROP2 VAL2 ...) so you can set
Stefan Monnier's avatar
Stefan Monnier committed
1320 1321 1322 1323
other properties than `face'.
*** font-lock-extra-managed-props can be set to make sure those extra
properties are automatically cleaned up by font-lock.

1324 1325 1326 1327
** The special treatment of faces whose names are of the form `fg:COLOR'
or `bg:COLOR' has been removed.  Lisp programs should use the
`defface' facility for defining faces with specific colors.

Stefan Monnier's avatar
Stefan Monnier committed
1328 1329 1330 1331 1332 1333 1334 1335
** The new function `run-mode-hooks' and the new macro `delay-mode-hooks'
are used by define-derived-mode to make sure the mode hook for the
parent mode is run at the end of the child mode.

** `provide' and `featurep' now accept an optional second argument
to test/provide subfeatures.  Also `provide' now checks `after-load-alist'
and run any code associated with the provided feature.

Gerd Moellmann's avatar
Gerd Moellmann committed
1336 1337 1338
** The variable `compilation-parse-errors-filename-function' can
be used to transform filenames found in compilation output.

1339 1340 1341 1342 1343
+++
** Functions `file-name-sans-extension' and `file-name-extension' now
ignore the leading dots in file names, so that file names such as
`.emacs' are treated as extensionless.

Gerd Moellmann's avatar
Gerd Moellmann committed
1344 1345 1346 1347
** Functions `user-uid' and `user-real-uid' now return floats if the
user UID doesn't fit in a Lisp integer.  Function `user-full-name'
accepts a float as UID parameter.

Stefan Monnier's avatar
Stefan Monnier committed
1348 1349
** `define-key-after' now accepts keys longer than 1.

Gerd Moellmann's avatar
Gerd Moellmann committed
1350
** `define-derived-mode' now accepts nil as the parent.
Stefan Monnier's avatar
Stefan Monnier committed
1351 1352 1353

** The local variable `no-byte-compile' in elisp files is now obeyed.

Stefan Monnier's avatar
Stefan Monnier committed
1354 1355 1356 1357 1358 1359 1360
** New functions `keymap-prompt' and `current-active-maps'.

** New function `describe-buffer-bindings'.

** New vars `exec-suffixes' and `load-suffixes' used when
searching for an executable resp. an elisp file.

Colin Walters's avatar
Colin Walters committed
1361
** Variable aliases have been implemented:
Gerd Moellmann's avatar
Gerd Moellmann committed
1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381

- Macro: defvaralias ALIAS-VAR BASE-VAR

This defines the symbol ALIAS-VAR as a variable alias for symbol
BASE-VAR.  This means that retrieving the value of ALIAS-VAR returns
the value of BASE-VAR, and changing the value of ALIAS-VAR changes the
value of BASE-VAR.

- Function: indirect-variable VARIABLE

This function returns the variable at the end of the chain of aliases
of VARIABLE.  If VARIABLE is not a symbol, or if VARIABLE is not
defined as an alias, the function returns VARIABLE.

It might be noteworthy that variables aliases work for all kinds of
variables, including buffer-local and frame-local variables.

** Functions from `post-gc-hook' are run at the end of garbage
collection.  The hook is run with GC inhibited, so use it with care.

Gerd Moellmann's avatar
Gerd Moellmann committed
1382 1383 1384
** If the second argument to `copy-file' is the name of a directory,
the file is copied to that directory instead of signaling an error.

Gerd Moellmann's avatar
Gerd Moellmann committed
1385 1386 1387
** The variables most-positive-fixnum and most-negative-fixnum
have been moved from the CL package to the core.

1388 1389 1390 1391
** On MS Windows, locale-coding-system is used to interact with the OS.
The Windows specific variable w32-system-coding-system, which was
formerly used for that purpose is now an alias for locale-coding-system.

Gerd Moellmann's avatar
Gerd Moellmann committed
1392 1393 1394 1395
** Functions y-or-n-p, read-char, read-keysequence and alike that
display a prompt but don't use the minibuffer now display the prompt
using the text properties (esp. the face) of the prompt string.

Stefan Monnier's avatar
Stefan Monnier committed
1396 1397 1398 1399 1400
** New packages:

*** The new package syntax.el provides an efficient way to find the
current syntactic context (as returned by parse-partial-sexp).

Stefan Monnier's avatar
Stefan Monnier committed
1401
*** The TCL package tcl-mode.el was replaced by tcl.el.
Colin Walters's avatar
Colin Walters committed
1402 1403
This was actually done in Emacs-21.1, and was not documented.

1404 1405 1406 1407 1408 1409
*** The new package button.el implements simple and fast `clickable buttons'
in emacs buffers.  `buttons' are much lighter-weight than the `widgets'
implemented by widget.el, and can be used by lisp code that doesn't
require the full power of widgets.  Emacs uses buttons for such things
as help and apropos buffers.

1410

Dave Love's avatar
Dave Love committed
1411 1412
* Installation Changes in Emacs 21.1

Dave Love's avatar
Dave Love committed
1413 1414 1415 1416
See the INSTALL file for information on installing extra libraries and
fonts to take advantage of the new graphical features and extra
charsets in this release.

Gerd Moellmann's avatar
Gerd Moellmann committed
1417 1418
** Support for GNU/Linux on IA64 machines has been added.

Dave Love's avatar
Dave Love committed
1419 1420
** Support for LynxOS has been added.

Gerd Moellmann's avatar
Gerd Moellmann committed
1421
** There are new configure options associated with the support for
1422 1423
images and toolkit scrollbars.  Use the --help option in `configure'
to list them.
Gerd Moellmann's avatar
Gerd Moellmann committed
1424

1425
** You can build a 64-bit Emacs for SPARC/Solaris systems which
Dave Love's avatar
Dave Love committed
1426
support 64-bit executables and also on Irix 6.5.  This increases the
Dave Love's avatar
Dave Love committed
1427 1428 1429
maximum buffer size.  See etc/MACHINES for instructions.  Changes to
build on other 64-bit systems should be straightforward modulo any
necessary changes to unexec.
Gerd Moellmann's avatar
Gerd Moellmann committed
1430

1431 1432 1433 1434 1435 1436 1437 1438
** There is a new configure option `--disable-largefile' to omit
Unix-98-style support for large files if that is available.

** There is a new configure option `--without-xim' that instructs
Emacs to not use X Input Methods (XIM), if these are available.

** `movemail' defaults to supporting POP.  You can turn this off using
the --without-pop configure option, should that be necessary.
Dave Love's avatar
Dave Love committed
1439

1440
** This version can be built for the Macintosh, but does not implement
Dave Love's avatar
Dave Love committed
1441
all of the new display features described below.  The port currently