1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2013 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that the appropriate manual has already been updated.
19 --- means no change in the manuals is called for.
20 When you add a new item, please add it without either +++ or ---
21 so we will look at it and add it to the manual.
24 * Installation Changes in Emacs 24.4
26 ** Emacs can be compiled with POSIX ACL support.
27 This happens by default if a suitable support library is found at
28 build time, like libacl on GNU/Linux. To prevent this, use the
29 configure option `--without-acl'.
32 * Startup Changes in Emacs 24.4
35 * Changes in Emacs 24.4
38 ** `apropos-variable' is now `apropos-user-option'
39 `apropos-user-option' shows all user options while `apropos-variable'
40 shows all variables. When called with a universal prefix argument,
41 the two commands swap their behaviors. When `apropos-do-all' is
42 non-nil, they output the same results.
45 ** `eval-defun' on an already defined defcustom calls the :set function,
48 ** The option `set-mark-default-inactive' has been deleted.
49 This unfinished feature was introduced by accident in Emacs 23.1;
50 simply disabling Transient Mark mode does the same thing.
52 ** `initial-buffer-choice' can now specify a function to set up the
55 ** ACL support has been added.
57 *** Emacs preserves the ACL entries of files when backing up.
59 *** New functions `file-acl' and `set-file-acl' get and set the ACL
60 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
61 libacl. On MS-Windows, the NT Security APIs are used to emulate the
64 ** New option `scroll-bar-adjust-thumb-portion'.
65 Available only on X, this option allows to control over-scrolling
66 using the scroll bar (i.e. dragging the thumb down even when the end
67 of the buffer is visible).
70 * Editing Changes in Emacs 24.4
72 ** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
73 bound to <f11> and M-<f10>, respectively.
76 * Changes in Specialized Modes and Packages in Emacs 24.4
78 ** Delphi mode is now called OPascal mode.
79 *** All delphi-* variables and functions have been renamed to opascal-*.
80 *** `delphi-newline-always-indents' is not supported any more
81 use `electric-indent-mode' instead.
82 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
84 ** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
86 ** completing-read-multiple's separator can now be a regexp.
87 The default separator is changed to allow surrounding spaces around the comma.
91 *** Battery information via the BSD `apm' utility is now supported.
95 *** New macro cl-tagbody.
98 *** letf is now just an alias for cl-letf.
102 *** Calc by default now uses the Gregorian calendar for all dates, and
103 uses January 1, 1 AD as its day number 1. Previously Calc used the
104 Julian calendar for dates before September 14, 1752, and it used
105 December 31, 1 BC as its day number 1; the new scheme is more
106 consistent with Calendar's calendrical system and day numbering.
108 *** The new variable `calc-gregorian-switch' lets you configure the
109 date when Calc switches from the Julian to the Gregorian calendar.
110 Nil, the default value, means to always use the Gregorian calendar.
111 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
114 *** Support for ISO 8601 dates.
118 *** New option `erc-accidental-paste-threshold-seconds'.
119 If set to a number, this can be used to avoid accidentally paste large
120 amounts of data into the ERC input.
122 ** Icomplete is a bit more like IDO.
123 *** key bindings to navigate through and select the completions.
124 *** The icomplete-separator is customizable, and its default has changed.
125 *** Removed icomplete-show-key-bindings.
129 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
130 visit the next image file and the previous image file in the same
131 directory, respectively.
134 *** The command `image-mode-fit-frame' deletes other windows.
135 When toggling, it restores the frame's previous window configuration.
136 It also has an optional frame argument, which can be used by Lisp
137 callers to fit the image to a frame other than the selected frame.
141 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
142 and adds it to the search string.
144 ** MH-E has been updated to MH-E version 8.4.
145 See MH-E-NEWS for details.
148 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
149 Customize `unrmail-mbox-format' to change this.
152 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
153 of how Rmail displays non-MIME messages.
156 ** New function `ses-rename-cell' to give SES cells arbitrary names.
158 ** trace-function was largely rewritten.
159 New features include:
160 - no prompting for the destination buffer, unless a prefix-arg was used.
161 - additionally to prompting for a destination buffer, when a prefix-arg is
162 used, the user can enter a "context", i.e. Lisp expression whose value at the
163 time the function is entered/exited will be printed along with the function
164 name and arguments. Useful to trace the value of (current-buffer) or
165 (point) when the function is invoked.
167 ** New command `delete-duplicate-lines' has two types of operation:
168 when its arg ADJACENT is non-nil (when called interactively with C-u C-u)
169 it works like the utility `uniq'. Otherwise by default it deletes
170 duplicate lines everywhere in the region without regard to adjacency.
172 ** New `cycle-spacing' command allows cycling between having just one
173 space, no spaces, or reverting to the original spacing. Like
174 `just-one-space' command it can handle or ignore newlines and
175 leave different number of spaces.
179 *** New connection method "adb", which allows to access Android
180 devices by the Android Debug Bridge. The variable `tramp-adb-sdk-dir'
181 must be set to the Android SDK installation directory.
183 *** Handlers for `file-acl' and `set-file-acl' for remote machines
184 which support POSIX ACLs.
188 *** The commands `woman-default-faces' and `woman-monochrome-faces'
189 are obsolete. Customize the `woman-* faces instead.
191 ** Obsolete packages:
193 *** longlines.el is obsolete; use visual-line-mode instead.
195 *** terminal.el is obsolete; use term.el instead.
198 * New Modes and Packages in Emacs 24.4
199 ** New nadvice.el package offering lighter-weight advice facilities.
201 - add-function/remove-function which can be used to add/remove code on any
202 function-carrying place, such as process-filters or `<foo>-function' hooks.
203 - advice-add/advice-remove to add/remove a piece of advice on a named function,
204 much like `defadvice' does.
207 * Incompatible Lisp Changes in Emacs 24.4
209 ** frame-local variables that affect redisplay do not work any more.
210 More specifically, the redisplay does not bother to check for a frame-local
211 value when looking up variables.
213 ** nil and "unbound" are indistinguishable in symbol-function.
214 `symbol-function' never signals `void-function' any more.
215 `fboundp' returns non-nil if the symbol was `fset' to nil.
217 ** `defadvice' does not honor the `freeze' flag and cannot advise
218 special-forms any more.
220 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
221 VAR was bound to nil which was not tremendously useful and just lead to
222 spurious warnings about an unused var.
224 ** The return value of `backup-buffer' has changed.
225 The second argument is no longer an SELinux context, instead it is an
226 alist of extended attributes as returned by the new function
227 `file-extended-attributes'. The attributes can be applied to another
228 file using `set-file-extended-attributes'.
231 * Lisp changes in Emacs 24.4
233 ** Support for filesystem notifications.
234 Emacs now supports notifications of filesystem changes, such as
235 creation, modification, and deletion of files. This requires the
236 'inotify' API on GNU/Linux systems. On MS-Windows systems, this is
237 supported for Windows XP and newer versions.
241 *** The `face-spec-set' is now analogous to `setq' for face specs.
242 Its third arg now accepts values specifying exactly which face spec to
243 set (defface, custom, or user spec), and it directly sets the relevant
244 property using the supplied face spec.
246 *** Face specs set via Custom themes now replace the `defface' spec
247 rather than inheriting from it (as do face specs set via Customize).
249 *** New face characteristic (supports :underline (:style wave))
250 specifies whether or not the terminal can display a wavy line.
252 ** time-to-seconds is not obsolete any more.
253 ** New function special-form-p.
254 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
255 text-property on the first char.
257 ** The `defalias-fset-function' property lets you catch calls to defalias
258 and redirect them to your own function instead of `fset'.
260 ** The 9th element returned by `file-attributes' is now unspecified.
261 Formerly, it was t if the file's gid would change if file were deleted
262 and recreated. This value has been inaccurate for years on many
263 platforms, and nobody seems to have noticed or cared.
265 ** The function `file-ownership-preserved-p' now has an optional
266 argument GROUP which causes it check for file group too. This can be
267 used in place of the 9th element of `file-attributes'.
269 ** New functions `group-gid' and `group-real-gid'.
271 ** The 6th argument to `copy-file' has been renamed to
272 `preserve-extended-attributes' as it now handles both SELinux context
276 * Changes in Emacs 24.4 on non-free operating systems
279 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
280 The backtrace is written to the 'emacs_backtrace.txt' file in the
281 directory where Emacs was running.
284 ** The variable `buffer-file-type' is no longer supported.
285 Setting it has no effect, and %t in the mode-line format is ignored.
286 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
287 modifying it has no effect.
289 ** Improved fullscreen support on Mac OS X.
290 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
291 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
292 native is the default.
295 * Installation Changes in Emacs 24.3
297 ** The default X toolkit is now Gtk+ version 3.
298 If you don't pass `--with-x-toolkit' to configure, or if you use
299 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
300 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
301 You can explicitly require a specific version by passing
302 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
304 ** New configure option `--enable-link-time-optimization', to utilize
305 an appropriate feature provided by GCC since version 4.5.0.
307 ** New configure option `--without-all' to disable most of the optional
308 features (image support, etc.) that are normally enabled by default.
310 ** New configure option `--enable-gcc-warnings' (for developing/debugging
311 Emacs). If building with GCC, this enables compile-time checks that
312 warn/give errors about possibly-questionable C code. On a recent GNU
313 system there should be no warnings; on older and on non-GNU systems
314 the results may be useful to developers.
316 ** The configure option `--enable-use-lisp-union-type' has been
317 renamed to `--enable-check-lisp-object-type', as the resulting
318 Lisp_Object type no longer uses a union to implement the compile time
319 check that this option enables.
321 ** The configure option `--disable-maintainer-mode' has been removed,
322 as it was confusingly-named and rarely useful.
324 ** The configure options `--program-prefix', `--program-suffix', and
325 `--program-transform-name' apply to more than just the installed
326 binaries. Now they also affect the man pages, icons, and the
327 etc/emacs.desktop file; but not the info pages, since this would break
328 links between the various manuals.
330 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
331 overwriting "emacs" in the installation bin/ directory with a link
334 ** Emacs uses libtinfo in preference to libncurses, if available.
336 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
337 /usr/pkg/lib to the linker search path. You must add them yourself if
340 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
341 (from the bin and libexec directories, respectively). The former is
342 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
345 * Startup Changes in Emacs 24.3
347 ** Emacs no longer searches for `leim-list.el' files beneath the standard
348 lisp/ directory. There should not be any there anyway. If you have
349 been adding them there, put them somewhere else; e.g., site-lisp.
351 ** The `--no-site-lisp' command line option now works for Nextstep builds.
354 * Changes in Emacs 24.3
358 *** `C-h f' (`describe-function') can now perform autoloading.
359 When this command is called for an autoloaded function whose docstring
360 contains a key substitution construct, that function's library is
361 automatically loaded, so that the documentation can be shown
362 correctly. To disable this, set `help-enable-auto-load' to nil.
364 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
365 even after their associated libraries have been loaded (and the
366 autoloads have been redefined as functions).
370 *** Images displayed via ImageMagick now support transparency and the
371 :background image specification property.
373 *** When available, ImageMagick support is automatically enabled.
374 It is no longer necessary to call `imagemagick-register-types'
375 explicitly to install ImageMagick image types; that function is called
376 automatically at startup, or when customizing an imagemagick- option.
378 *** Setting `imagemagick-types-inhibit' to t now disables the use of
379 ImageMagick to view images. (You must call `imagemagick-register-types'
380 afterwards if you do not use customize to change this.)
382 *** The new variable `imagemagick-enabled-types' also affects which
383 ImageMagick types are treated as images. The function
384 `imagemagick-filter-types' returns the list of types that will be
389 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
390 next and previous path separator, respectively.
392 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
393 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
394 non-nil before enabling the mode.
398 *** New option `mode-line-default-help-echo' specifies the help text
399 (shown in a tooltip or in the echo area) for any part of the mode line
400 that does not have its own specialized help text.
402 *** You can now click mouse-3 in the coding system indicator to invoke
403 `set-buffer-file-coding-system'.
407 *** emacsclient now obeys string values for `initial-buffer-choice',
408 if it is told to open a new frame without specifying any file to visit
409 or expression to evaluate.
411 *** New option `server-auth-key' specifies a shared server key.
413 ** Emacs now generates backtraces on fatal errors.
414 On encountering a fatal error, Emacs now outputs a textual description
415 of the fatal signal, and a short backtrace on platforms like glibc
416 that support backtraces.
418 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
419 This minor mode replaces `toggle-read-only', which is now obsolete.
421 ** Most `y-or-n' prompts now allow you to scroll the selected window.
422 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
423 respectively, without exiting from the prompt.
425 ** In the Package Menu, newly-available packages are listed as "new",
426 and sorted above the other "available" packages by default.
428 ** If your Emacs was built from a bzr checkout, the new variable
429 `emacs-bzr-version' contains information about the bzr revision used.
431 ** New option `create-lockfiles' specifies usage of lockfiles.
432 It defaults to t. Changing it to nil inhibits the creation of lock
433 files (use this with caution).
435 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
436 variables on remote hosts.
438 ** The entry for PCL-CVS has been removed from the Tools menu.
439 The PCL-CVS commands are still available via the keyboard.
441 ** Using "unibyte: t" in Lisp source files is obsolete.
442 Use "coding: raw-text" instead.
444 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
445 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
446 The previous binding, introduced in Emacs 24.1, was a mistake, because
447 `C-c LETTER' bindings are reserved for user customizations.
449 ** Internationalization
451 *** New language environment: Persian.
453 *** New input method `vietnamese-vni'.
455 ** Nextstep (GNUstep / Mac OS X) port
457 *** Support for fullscreen and the frame parameter fullscreen.
459 *** A file dialog is used for open/save operations initiated from the
463 * Editing Changes in Emacs 24.3
465 ** Search and Replace
467 *** Non-regexp Isearch now performs "lax" space matching.
468 Each sequence of spaces in the supplied search string may match any
469 sequence of one or more whitespace characters, as specified by the
470 variable `search-whitespace-regexp'. (This variable is also used by a
471 similar existing feature for regexp Isearch.)
473 *** New Isearch command `M-s SPC' toggles lax space matching.
474 This applies to both ordinary and regexp Isearch.
476 *** New option `replace-lax-whitespace'.
477 If non-nil, `query-replace' uses flexible whitespace matching too.
480 *** Global `M-s _' starts a symbol (identifier) incremental search,
481 and `M-s _' in Isearch toggles symbol search mode.
482 `M-s c' in Isearch toggles search case-sensitivity.
484 ** Navigation commands
486 *** New binding `M-g c' for `goto-char'.
488 *** New binding `M-g TAB' for `move-to-column'.
490 *** `M-g TAB' (`move-to-column') prompts for a column number if called
491 interactively with no prefix arg. Previously, it moved to column 1.
493 ** New option `yank-handled-properties' allows processing of text
494 properties on yanked text, in ways that are more general than just
495 removing them (as is done by `yank-excluded-properties').
497 ** New option `delete-trailing-lines' specifies whether
498 M-x delete-trailing-whitespace should delete trailing lines at the end
499 of the buffer. It defaults to t.
501 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
503 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
504 `ucs-insert' is now an obsolete alias for `insert-char'.
506 ** The `z' key no longer has a binding in most special modes.
507 It used to be bound to `kill-this-buffer', but `z' is too easy to
510 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
511 It copies the region-rectangle as the last rectangle kill.
515 *** `C-x r +' is now overloaded to invoke `append-to-register'.
517 *** New option `register-separator' specifies the register containing
518 the text to put between collected texts for use with
519 M-x append-to-register and M-x prepend-to-register.
522 * Changes in Specialized Modes and Packages in Emacs 24.3
524 ** Common Lisp emulation (CL)
526 *** CL's main entry is now (require 'cl-lib).
527 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
528 i.e., all its definitions have the "cl-" prefix (and internal definitions
529 use the "cl--" prefix).
531 If `cl' provided a feature under the name `foo', then `cl-lib'
532 provides it under the name `cl-foo' instead; with the exceptions of the
533 few `cl' definitions that had to use `foo*' to avoid conflicts with
534 pre-existing Elisp entities. These have been renamed to `cl-foo'
535 rather than `cl-foo*'.
537 The old `cl' is now deprecated and is mainly just a bunch of aliases that
538 provide the old, non-prefixed names. Some exceptions are listed below:
540 *** `cl-flet' is not like `flet' (which is deprecated).
541 Instead it obeys the behavior of Common-Lisp's `flet'.
542 In particular, in cl-flet function definitions are lexically scoped,
543 whereas in flet the scoping is dynamic.
545 *** `cl-labels' is slightly different from `labels'.
546 The difference is that it relies on the `lexical-binding' machinery
547 (as opposed to the `lexical-let' machinery used previously) to capture
548 definitions in closures, so such closures will only work if `lexical-binding'
551 *** `cl-letf' is not exactly like `letf'.
552 The only difference is in details that relate to some deprecated usage
553 of `symbol-function' in place forms.
555 *** `progv' was rewritten to use the `let' machinery.
556 A side effect is that variables without corresponding values are bound
557 to nil rather than being made unbound.
559 *** The following methods of extending `setf' are obsolete
560 (use features from gv.el instead):
561 `define-modify-macro' (use `gv-letplace')
562 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
563 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
564 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
568 *** Changes are now highlighted using the same color scheme as in
569 modern VCSes. Deletions are displayed in red (new faces
570 `diff-refine-removed' and `smerge-refined-removed', and new definition
571 of `diff-removed'), insertions in green (new faces `diff-refine-added'
572 and `smerge-refined-added', and new definition of `diff-added').
574 *** The variable `diff-use-changed-face' defines whether to use the
575 face `diff-changed', or `diff-removed' and `diff-added' to highlight
576 changes in context diffs.
578 *** The new command `diff-delete-trailing-whitespace' removes trailing
579 whitespace introduced by a diff.
581 ** Ediff now uses the same color scheme as Diff mode.
585 A new version of python.el, which provides several new features, including:
586 per-buffer shells, better indentation, Python 3 support, and improved
587 shell-interaction compatible with iPython (and virtually any other
590 *** Some user options have been replaced/renamed, including (old -> new):
591 **** python-indent -> python-indent-offset
592 **** python-guess-indent -> python-indent-guess-indent-offset
593 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
594 **** python-use-skeletons -> python-skeleton-autoinsert
596 *** Some user options have been removed, including:
598 **** `python-indent-string-contents': Strings are never indented.
600 **** `python-honour-comment-indentation':
601 Comments are always considered as indentation markers.
603 **** `python-continuation-offset': Indentation is automatically
604 calculated in a pep8 compliant way depending on the context.
606 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
607 Have no direct mapping as the shell interaction is completely different.
609 **** `python-python-command', `python-jython-command':
610 Replaced by `python-shell-interpreter'.
612 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
613 `python-pdbtrack-minor-mode-string', `python-source-modes':
616 *** Some commands have been replaced (old -> new):
617 **** python-insert-class -> python-skeleton-class
618 **** python-insert-def -> python-skeleton-def
619 **** python-insert-for -> python-skeleton-for
620 **** python-insert-if -> python-skeleton-if
621 **** python-insert-try/except -> python-skeleton-try
622 **** python-insert-try/finally -> python-skeleton-try
623 **** python-insert-while -> python-skeleton-while
624 **** python-find-function -> python-nav-jump-to-defun
625 **** python-next-statement -> python-nav-forward-sentence
626 **** python-previous-statement -> python-nav-backward-sentence
627 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
628 **** python-end-of-defun-function -> python-nav-end-of-defun
629 **** python-send-buffer -> python-shell-send-buffer
630 **** python-send-defun -> python-shell-send-defun
631 **** python-send-region -> python-shell-send-region
632 **** python-send-region-and-go -> emulate with python-shell-send-region
633 and python-shell-switch-to-shell
634 **** python-send-string -> python-shell-send-string
635 **** python-switch-to-python -> python-shell-switch-to-shell
636 **** python-describe-symbol -> python-eldoc-at-point
640 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
642 *** The D-Bus object manager interface is implemented.
644 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
645 if their value does not fit into Emacs's integer range.
647 *** The function `dbus-call-method' is now non-blocking.
648 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
650 *** Signals can also be sent as unicast messages.
652 *** The argument list of `dbus-register-signal' has been extended,
653 according to the new match rule types of D-Bus.
655 *** `dbus-init-bus' supports private connections.
657 *** There is a new function `dbus-setenv'.
659 ** `desktop-path' no longer includes the "." directory.
660 Desktop files are now located in ~/.emacs.d by default.
664 *** `dired-do-async-shell-command' executes each file sequentially
665 if the command ends in `;' (when operating on multiple files).
666 Otherwise, it executes the command on each file in parallel.
668 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
669 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
672 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
673 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
674 mark/unmark/flag all files in the active region.
676 *** The minibuffer default for `=' (`dired-diff) has changed.
677 It is now the backup file for the file at point, if one exists.
678 In Transient Mark mode the default is the file at the active mark.
680 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
681 The global binding for `M-=', `count-words-region' is in effect.
685 *** New module "notifications", which can send a notification when you
686 receive a private message or your nickname is mentioned.
688 *** ERC will look up server/channel names via auth-source and use any
691 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
692 only applies to messages sent by lurkers.
694 ** reStructuredText mode
696 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
697 fontification, comment handling, and customization have all been revised
700 *** Support for `imenu' and `which-function-mode'.
702 *** The reStructuredText syntax is more closely covered.
703 Sphinx support has been improved.
705 *** `rst-insert-list' inserts new list or continues existing lists.
707 *** A negative prefix argument always works for `rst-adjust'.
709 *** The window configuration is reset after displaying a TOC.
711 *** The constant `rst-version' describes the rst.el package version.
715 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
717 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
719 *** `sh-use-smie' lets you choose a new indentation and navigation code.
723 *** The free software compiler GHDL is supported (and now the default).
725 *** Support for the VHDL-AMS packages has been added/updated.
727 *** Updated to the 2002 revision of the VHDL standard.
729 *** Accepts \r and \f as whitespace.
733 *** The faces used by Apropos are now directly customizable.
734 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
735 see the `apropos' Custom group for details.
737 *** The old options whose values specified faces to use have been removed
738 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
742 *** This package has been rewritten to use Tabulated List mode.
744 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
745 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
749 *** Algebraic simplification mode is now the default.
750 To restrict to the limited simplifications given by the former
751 default simplification mode, use `m I'.
755 *** You can customize the header text that appears above each calendar month.
756 See the variable `calendar-month-header'.
758 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
760 *** The calendars produced by cal-html include holidays.
761 Customize `cal-html-holidays' to change this.
763 ** Compile has a new option `compilation-always-kill'.
767 *** `custom-reset-button-menu' now defaults to t.
769 *** Non-option variables are never matched in `customize-apropos' and
770 `customize-apropos-options' (i.e., the prefix argument does nothing for
775 *** The variables `term-default-fg-color' and `term-default-bg-color'
776 are now deprecated in favor of the customizable face `term'.
778 *** You can customize how to display ANSI terminal colors and styles
779 by customizing the corresponding `term-color-<COLOR>',
780 `term-color-underline' and `term-color-bold' faces.
784 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
786 *** Remote processes are now also supported on remote MS-Windows hosts.
790 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
791 Previously, this slot stored semicolon-separated attribute-value pairs
792 appended to some imap URLs, but this is not compatible with RFC 3986.
793 So now the `filename' slot stores the entire path and query components,
794 and the `attributes' slot is always nil.
796 *** New function `url-encode-url' for encoding a URI string.
797 The `url-retrieve' function now uses this to encode its URL argument,
798 in case that is not properly encoded.
800 ** notifications.el supports now version 1.2 of the Notifications API.
801 The function `notifications-get-capabilities' returns the supported
804 ** Flymake uses fringe bitmaps to indicate errors and warnings.
805 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
806 `flymake-warning-bitmap'.
808 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
809 specifying URL types that should be converted to remote file names at
810 the FFAP prompt. The default is now '("ftp").
812 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
813 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
815 ** New option `mouse-avoidance-banish-position' specifies where the
816 `banish' mouse avoidance setting moves the mouse.
818 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
819 closing brackets to be aligned with the line of the opening bracket.
821 ** In Proced mode, new command `proced-renice' renices marked processes.
823 ** New option `async-shell-command-buffer' specifies the buffer to use
824 for a new asynchronous `shell-command' when the default output buffer
825 `*Async Shell Command*' is already in use.
827 ** SQL mode has a new option `sql-db2-escape-newlines'.
828 If non-nil, newlines sent to the command interpreter will be escaped
829 by a backslash. The default does not escape the newlines and assumes
830 that the sql statement will be terminated by a semicolon.
832 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
833 (and modes that derive from it), sorts the column at point, or the Nth
834 column if a numeric prefix argument is given.
836 ** `which-func-modes' now defaults to t, so Which Function mode, when
837 enabled, applies to all applicable major modes.
839 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
842 ** Follow mode no longer works by using advice.
843 The option `follow-intercept-processes' has been removed.
845 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
847 ** Hooks renamed to avoid obsolete "-hooks" suffix:
848 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
849 *** semantic-change-hooks -> semantic-change-functions
850 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
851 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
852 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
853 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
854 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
855 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
856 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
857 *** rcirc-activity-hooks -> rcirc-activity-functions
858 *** rcirc-print-hooks -> rcirc-print-functions
859 *** dbus-event-error-hooks -> dbus-event-error-functions
860 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
861 *** checkdoc-style-hooks -> checkdoc-style-functions
862 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
863 *** archive-extract-hooks -> archive-extract-hook
864 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
865 *** hfy-post-html-hooks -> hfy-post-html-hook
866 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
867 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
868 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
869 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
874 In most cases, assoc+member+push+delq work just as well.
875 And in any case it's just a terrible package: ugly semantics, terrible
876 inefficiency, and not namespace-clean.
885 * Incompatible Lisp Changes in Emacs 24.3
887 ** Docstrings starting with `*' no longer indicate user options.
888 Only variables defined using `defcustom' are considered user options.
889 The function `user-variable-p' is now an obsolete alias for
892 ** The return values of `defalias', `defun' and `defmacro' have changed,
893 and are now undefined. For backwards compatibility, `defun' and
894 `defmacro' currently return the name of the newly defined
895 function/macro, but this should not be relied upon.
897 ** `random' by default now returns a different random sequence in
898 every Emacs run. Use `(random S)', where S is a string, to set the
899 random seed to a value based on S, in order to get a repeatable
900 sequence in later calls.
902 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
903 that substring is inserted literally even if the LITERAL arg is
904 non-nil, instead of causing an error to be signaled.
906 ** `select-window' now always makes the window's buffer current.
907 It does so even if the window was selected before.
909 ** The function `x-select-font' can return a font spec, instead of a
910 font name as a string. Whether it returns a font spec or a font name
911 depends on the graphical library.
913 ** `face-spec-set' no longer sets frame-specific attributes when the
914 third argument is a frame (that usage was obsolete since Emacs 22.2).
916 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
918 ** The CL package's `get-setf-method' function no longer exists.
919 Generalized variables are now part of core Emacs Lisp, and implemented
920 differently to the way cl.el used to do it. It is not possible to
921 define a compatible replacement for `get-setf-method'. See the file
922 gv.el for internal details of the new implementation.
924 ** The arguments of `dbus-register-signal' are no longer just strings,
925 but keywords or keyword-string pairs. The old argument list will
926 still be supported for Emacs 24.x.
928 ** Miscellaneous name changes
929 Some Lisp symbols have been renamed to correct their spelling,
930 or to be more consistent with standard Emacs terminology.
932 *** Renamed functions
933 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
934 **** inactivate-input-method -> deactivate-input-method
935 **** quail-inactivate -> quail-deactivate
936 **** robin-inactivate -> robin-deactivate
937 **** viper-inactivate-input-method -> viper-deactivate-input-method
938 **** viper-inactivate-input-method-action ->
939 viper-deactivate-input-method-action
940 **** ucs-input-inactivate -> ucs-input-deactivate
943 The old hooks are still supported for backward compatibility, but they
944 are deprecated and will be removed eventually.
945 **** input-method-inactivate-hook -> input-method-deactivate-hook
946 **** robin-inactivate-hook -> robin-deactivate-hook
947 **** quail-inactivate-hook -> quail-deactivate-hook
949 *** Renamed variables
950 **** follow-deactive-menu -> follow-inactive-menu
951 **** inactivate-current-input-method-function ->
952 deactivate-current-input-method-function
954 ** Some obsolete functions, variables, and faces have been removed:
955 *** `last-input-char', `last-command-char', `unread-command-char'
956 *** `facemenu-unlisted-faces'
957 *** `rmail-decode-mime-charset'
958 *** `iswitchb-read-buffer'
959 *** `sc-version', `sc-submit-bug-report'
960 *** `set-char-table-default'
961 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
962 *** `compile-internal'
964 *** `mode-line-inverse-video'
965 *** `follow-mode-off-hook'
966 *** `cvs-commit-buffer-require-final-newline'
967 (use `log-edit-require-final-newline' instead)
968 *** `cvs-changelog-full-paragraphs'
969 (use `log-edit-changelog-full-paragraphs' instead)
970 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
971 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
972 *** `vc-master-templates' (use `vc-handled-backends' instead)
973 *** `vc-checkout-carefully'
976 * Lisp changes in Emacs 24.3
978 ** CL-style generalized variables are now in core Elisp.
979 `setf' is autoloaded; `push' and `pop' accept generalized variables.
980 You can define your own generalized variables using `gv-define-simple-setter',
981 `gv-define-setter', etc.
983 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
984 This can significantly speed up execution of non-byte-compiled code,
985 but can also bump into previously unnoticed cyclic dependencies.
986 These are generally harmless: they will simply cause the macro calls
987 to be left for later expansion (as before), but will result in a
988 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
989 You may wish to restructure your code so this does not happen.
991 ** New sampling-based Elisp profiler.
992 Try M-x profiler-start, do some work, and then call M-x profiler-report.
993 When finished, use M-x profiler-stop. The sampling rate can be based on
994 CPU time or memory allocations.
996 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
997 The interpretation of the DECLS is determined by `defun-declarations-alist'.
999 ** New macros `setq-local' and `defvar-local'.
1001 ** Face underlining can now use a wave.
1003 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1004 of `read-regexp' accepts a string ending with a colon and space, and its
1005 second argument DEFAULTS can be a list of strings accessible via `M-n'
1006 in the minibuffer ahead of other hard-coded useful regexp-related values.
1007 More commands use `read-regexp' now to read their regexp arguments.
1011 *** New function `completion-table-with-quoting' to handle completion
1012 in the presence of quoting, such as file completion in shell buffers.
1014 *** New function `completion-table-subvert' to use an existing completion
1015 table, but with a different prefix.
1019 *** New error type and new function `user-error'.
1020 These do not trigger the debugger.
1022 *** New option `debugger-bury-or-kill', saying what to do with the
1023 debugger buffer when exiting debug.
1025 *** Set `debug-on-message' to enter the debugger when a certain
1026 message is displayed in the echo area. This can be useful when trying
1027 to work out which code is doing something.
1029 *** New var `inhibit-debugger', automatically set to prevent accidental
1030 recursive invocations.
1034 *** New command `fit-frame-to-buffer' adjusts the frame height to
1037 *** The command `fit-window-to-buffer' can adjust the frame height
1038 if the new option `fit-frame-to-buffer' is non-nil.
1040 *** New macro `with-temp-buffer-window', similar to
1041 `with-output-to-temp-buffer'.
1043 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1046 *** New option `switch-to-buffer-preserve-window-point' to restore a
1047 window's point when switching buffers.
1049 *** New display action alist entries `window-height' and `window-width'
1050 specify the size of new windows created by `display-buffer'.
1052 *** New display action alist entry `pop-up-frame-parameters', if
1053 non-nil, specifies frame parameters to give any newly-created frame.
1055 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1056 tells display action functions to avoid changing which frame is
1059 *** New display action alist entry `previous-window', if non-nil,
1060 specifies window to reuse in `display-buffer-in-previous-window'.
1062 *** New display action functions `display-buffer-below-selected',
1063 and `display-buffer-in-previous-window'.
1065 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1066 now accept a third argument to avoid choosing the selected window.
1068 *** Additional values recognized for option `window-combination-limit'.
1070 *** The following variables are obsolete, as they can be replaced by
1071 appropriate entries in the `display-buffer-alist' function introduced
1073 **** `dired-shrink-to-fit'
1074 **** `display-buffer-reuse-frames'
1075 **** `display-buffer-function'
1076 **** `special-display-buffer-names'
1077 **** `special-display-frame-alist'
1078 **** `special-display-function'
1079 **** `special-display-regexps'
1083 *** `current-time-string' no longer requires that its argument's year
1084 must be in the range 1000..9999. It now works with any year supported
1085 by the underlying C implementation.
1087 *** `current-time' now returns extended-format time stamps
1088 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1089 PSEC is typically a multiple of 1000 on current machines. Other
1090 functions that use this format, such as `file-attributes' and
1091 `format-time-string', have been changed accordingly. Old-format time
1092 stamps are still accepted.
1094 *** The format of timers in `timer-list' and `timer-idle-list' is now
1095 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1096 The PSECS slot is new, and uses picosecond resolution. It can be
1097 accessed via the new `timer--psecs' accessor.
1099 *** Last-modified time stamps in undo lists now are of the form
1100 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1102 ** Floating point functions now always return special values like NaN,
1103 instead of signaling errors, if given invalid args; e.g., (log -1.0).
1104 Previously, they returned NaNs on some platforms but signaled errors
1105 on others. The affected functions are acos, asin, tan, exp, expt,
1106 log, log10, sqrt, and mod.
1108 ** New fringe bitmap `exclamation-mark'.
1110 ** Miscellaneous changes to special forms and macros
1112 *** `defun' and `defmacro' are now macros rather than special forms.
1114 *** `kbd' is now a function rather than a macro.
1116 ** Miscellaneous new functions
1118 *** `set-temporary-overlay-map' sets up a temporary keymap that
1119 takes precedence over most other maps for a short while (normally one key).
1121 *** `autoloadp' tests if its argument is an autoloaded object.
1123 *** `autoload-do-load' performs the autoloading operation.
1125 *** `buffer-narrowed-p' tests if the buffer is narrowed.
1127 *** `file-name-base' returns a file name sans directory and extension.
1129 *** `function-get' fetches a function property, following aliases.
1131 *** `posnp' tests if an object is a `posn'.
1133 *** `system-users' returns the user names on the system.
1135 *** `system-groups' returns the group names on the system.
1137 *** `tty-top-frame' returns the topmost frame of a text terminal.
1139 ** The following functions and variables are obsolete:
1140 *** `automount-dir-prefix' (use `directory-abbrev-alist')
1141 *** `buffer-has-markers-at'
1142 *** `macro-declaration-function' (use `macro-declarations-alist')
1143 *** `window-system-version' (provides no useful information)
1144 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
1145 *** `query-replace-interactive'
1146 *** `font-list-limit' (has had no effect since Emacs < 23)
1149 * Changes in Emacs 24.3 on non-free operating systems
1151 ** Cygwin builds can use the native MS Windows user interface.
1152 Pass `--with-w32' to configure. The default remains the X11 interface.
1154 ** Two new functions are available in Cygwin builds:
1155 `cygwin-convert-file-name-from-windows' and
1156 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
1157 code to access the Cygwin file-name mapping machinery to convert
1158 between Cygwin and Windows-native file and directory names.
1160 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
1161 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
1162 `mouse-autoselect-window'.
1164 ** On MS Windows Vista and later Emacs now supports symbolic links.
1166 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
1167 support for libxml2, even if its presence is detected.
1169 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1171 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
1172 directories to the search path. You must add them yourself if you want them.
1175 * Changes in Emacs 24.2
1177 ** This is mainly a bug-fix release.
1180 * Installation Changes in Emacs 24.1
1182 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1183 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1184 also depend on Gtk+. You can disable them with --without-rsvg and
1187 ** Emacs can be compiled with GnuTLS support.
1188 This happens by default if a suitably recent version of the library is
1189 found at build time. To prevent this, use the configure option
1190 `--without-gnutls'. See below for GnuTLS features.
1192 ** Emacs can be compiled with SELinux support.
1193 This happens by default if a suitably recent version of the library is
1194 found at build time. To prevent this, use the configure option
1195 `--without-selinux'. See below for SELinux features.
1197 ** Emacs can be compiled with ImageMagick support.
1198 This happens by default if a suitably recent version of the library is
1199 found at build time. To prevent this, use the configure option
1200 `--without-imagemagick'. See below for ImageMagick features.
1201 This feature is not available for the Nextstep or MS ports.
1203 ** Emacs can be compiled with libxml2 support.
1204 This happens by default if a suitably recent version of the library is
1205 found at build time. To prevent this, use the configure option
1206 `--without-xml2'. See below for libxml2 features.
1208 ** By default, the installed Info and man pages are compressed.
1209 You can disable this by configuring --without-compress-info.
1211 ** New configure option --with-wide-int.
1212 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
1213 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1216 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
1217 These provide no new functionality, they just remove the need to edit
1218 lib-src/Makefile by hand in order to use the associated features.
1220 ** New configure option --enable-use-lisp-union-type.
1221 This is only useful for Emacs developers to debug certain types of bugs.
1222 This is not a new feature; only the configure flag is new.
1224 ** The standalone programs digest-doc and sorted-doc are removed.
1225 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1227 ** The standalone program `fakemail' is removed.
1228 If you need it, feedmail.el provides a superset of the functionality.
1231 * Startup Changes in Emacs 24.1
1233 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1234 command line arguments, and the EMACS_UNIBYTE environment variable, no
1235 longer have any effect. (They were declared obsolete in Emacs 23.)
1237 ** New command line option `--no-site-lisp' removes site-lisp directories
1238 from load-path. -Q now implies this. This option does not affect the
1239 EMACSLOADPATH environment variable (and hence has no effect for
1243 * Changes in Emacs 24.1
1247 *** Many packages now use the `completion-at-point' command,
1248 rather than implementing separate completion commands.
1250 *** `completion-at-point' now handles tags and semantic completion.
1252 *** Completion in a non-minibuffer now tries to detect the end of completion
1253 and pops down the *Completions* buffer accordingly.
1255 *** New option `completion-cycle-threshold' allows completion cycling.
1257 *** New option `completion-category-overrides' for overriding the
1258 default completion style in certain circumstances.
1260 *** New completion style `substring'.
1262 *** Completion of buffer names uses `substring' completion by default.
1264 *** The option `widget-complete-field' has been removed.
1268 *** The first time you try sending mail, Emacs asks for a mail method.
1269 This is implemented by a new default for `send-mail-function', which
1270 is `sendmail-query-once'. This offers to use the smtpmail package, or
1271 to use the old defaults relying on external mail facilities
1272 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
1273 `mailclient-send-it' on Windows).
1275 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
1276 transfers the report to your desktop's preferred mail client, if there
1277 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
1280 *** See Changes in Specialized Modes and Packages for SMTPmail changes
1281 and Mail mode changes
1283 ** Emacs server and client changes
1285 *** New option `server-port' specifies the port for TCP Emacs servers.
1287 *** New emacsclient argument -q/--quiet suppresses some status messages.
1289 *** New emacsclient argument --frame-parameters specifies the frame
1290 parameters of any newly-created graphical frame.
1292 *** If emacsclient shuts down due to Emacs signaling an error,
1293 its exit status is 1.
1295 *** New emacsclient argument --parent-id ID.
1296 This opens a client frame in parent X window ID, via XEmbed, similar
1297 to the --parent-id argument to Emacs.
1299 ** Internationalization changes
1301 *** Emacs now supports display and editing of bidirectional text.
1302 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1303 displayed in the correct visual order as expected by users of those
1304 scripts. The display reordering is a "full bidirectionality" class
1305 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1306 with no RTL text should look exactly the same as before.
1308 **** New buffer-local variable `bidi-display-reordering'.
1309 To disable display reordering in a buffer, change this to nil.
1311 **** New buffer-local variable `bidi-paragraph-direction'.
1312 If nil (the default), Emacs determines the base direction of each
1313 paragraph from its text, as specified by the UBA. Setting the value
1314 to `right-to-left' or `left-to-right' forces a base direction on each
1317 Paragraphs with right-to-left base direction are displayed starting at
1318 the right window edge.
1320 *** Enhanced support for characters with no glyphs in available fonts,
1321 or, on text terminals, characters that cannot be encoded by the
1322 terminal coding system. The new option `glyphless-char-display-control'
1323 specifies how to display them: as a hexadecimal code in a box, a thin
1324 1-pixel space, an empty box, etc.
1326 *** New input methods for Farsi and Bulgarian
1327 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
1329 *** `nobreak-char-display' now also highlights Unicode hyphen chars
1330 (U+2010 and U+2011).
1332 *** New Hebrew translation of the Emacs Tutorial.
1333 Type `C-u C-h t' to choose it in case your language setup doesn't
1334 automatically select it.
1336 ** An Emacs Lisp package manager is now included.
1337 This is a convenient way to download and install additional packages,
1338 from a package repository at http://elpa.gnu.org.
1340 *** M-x list-packages shows a list of packages, which can be
1341 selected for installation.
1343 *** New command `describe-package', bound to `C-h P'.
1345 *** By default, all installed packages are loaded automatically when
1346 Emacs starts up. To disable this, set `package-enable-at-startup' to
1347 nil. To specify the packages to load, customize `package-load-list'.
1349 ** Custom theme changes
1351 *** New command `M-x customize-themes', which provides a convenient
1352 interface for enabling and disabling Custom themes.
1354 *** New option `custom-theme-load-path' is the load path for themes.
1355 Emacs no longer looks for Custom themes in `load-path'. The default
1356 value of `custom-theme-load-path' says to look for themes in
1357 `custom-theme-directory', followed by a subdirectory of
1358 `data-directory' named "themes/", which contains a small selection of
1359 built-in Custom themes.
1361 *** New option `custom-safe-themes' records known-safe theme files.
1362 If a theme is not in this list, Emacs queries before loading it, and
1363 offers to save the theme to `custom-safe-themes' automatically. By
1364 default, all themes included in Emacs are treated as safe.
1366 ** Improved GTK integration
1368 *** GTK scroll-bars are now placed on the right by default.
1369 The function `set-scroll-bar-mode' can change this.
1371 *** GTK tool bars can have just text, just images or images and text.
1372 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
1373 the default is taken from desktop settings.
1375 *** GTK tool bars can be placed on any edge of the frame.
1376 The frame-parameter tool-bar-position controls this. It takes the
1377 values top, left, right or bottom. The Options => Show/Hide menu has
1380 *** The default colors for selected text (the `region' face) are taken
1381 from the GTK theme when Emacs is built with GTK.
1383 *** Emacs uses GTK tooltips by default if built with GTK.
1384 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
1386 ** Graphical interface changes
1388 *** On graphical displays, the mode-line no longer ends in dashes.
1389 Also, the first dash (which does not indicate anything) is just
1390 displayed as a space.
1392 *** `menu-bar-select-buffer-function' lets you choose another operation
1393 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
1395 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
1396 built with Xft. These fonts can be set via X resources, for example:
1397 Emacs.pane.menubar.font: Courier-12
1401 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
1402 or if it receives a SIGINT signal in batch mode.
1404 *** `kill-emacs-hook' is now also run in batch mode.
1405 Third-party code which adds to `kill-emacs-hook' should check if they
1406 do the right thing in batch mode.
1408 ** Scrolling changes
1410 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
1411 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
1412 of buffer at first key-press (instead they move to top/bottom of buffer)
1413 when `scroll-error-top-bottom' is non-nil.
1415 *** New option `scroll-error-top-bottom' (see above).
1417 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
1418 scroll a line instead of full screen.
1420 *** New property `scroll-command' should be set on a command's symbol to
1421 define it as a scroll command affected by `scroll-preserve-screen-position'.
1423 *** If you customize `scroll-conservatively' to a value greater than 100,
1424 Emacs will never recenter point in the window when it scrolls due to
1425 cursor motion commands or commands that move point (e.f., `M-g M-g').
1426 Previously, you needed to use `most-positive-fixnum' as the value of
1427 `scroll-conservatively' to achieve the same effect.
1429 *** "Aggressive" scrolling now honors the scroll margins.
1430 If you customize `scroll-up-aggressively' or
1431 `scroll-down-aggressively' and move point off the window, Emacs now
1432 scrolls the window so as to avoid positioning point inside the scroll
1435 ** Basic SELinux support has been added.
1436 This requires Emacs to be linked with libselinux at build time.
1438 *** Emacs preserves the SELinux file context when backing up.
1439 Also, the function `copy-file' has an extra optional argument for
1440 preserving SELinux context, and the return value of `backup-buffer'
1441 now includes the SELinux context.
1443 *** New functions `file-selinux-context' and `set-file-selinux-context'
1444 get and set the SELinux context of a file.
1448 *** `delete-by-moving-to-trash' now only affects commands that specify
1449 trashing. This avoids inadvertently trashing temporary files.
1451 *** Calling `delete-file' or `delete-directory' with a prefix argument
1452 now forces true deletion, regardless of `delete-by-moving-to-trash'.
1454 ** File- and directory-local variable changes
1456 *** You can stop directory local vars from applying to subdirectories.
1457 Add an element (subdirs . nil) to the alist portion of any variables
1458 settings to indicate that the section should not apply to
1461 *** Directory local variables can apply to some file-less buffers.
1462 Affected modes include dired, vc-dir, and log-edit. For example,
1463 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
1464 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
1465 `hack-dir-local-variables-non-file-buffer' to support this.
1467 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
1468 Instead, use "eval: (minor-mode 1)".
1470 *** The variable `inhibit-first-line-modes-regexps' has been renamed
1471 to `inhibit-local-variables-regexps'. As the name suggests, it now
1472 applies to ALL file local variables, not just -*- lines. The
1473 associated `inhibit-first-line-modes-suffixes' has been renamed in the
1478 *** The `quit-window' command now restores the last buffer displayed
1479 in the quitted window.
1481 *** Resizing an Emacs frame now preserves proportional window sizes,
1482 modulo restrictions like window minimum sizes and fixed-size windows.
1484 *** The behavior of `display-buffer' is now customizable in detail.
1486 **** New option `display-buffer-base-action' specifies a list of
1487 user-determined display "actions" (functions and optional arguments
1488 for choosing the displaying window).
1490 This takes precedence over the default display action, which is
1491 specified by `display-buffer-fallback-action'.
1493 **** New option `display-buffer-alist' maps buffer name regexps to
1494 display actions, taking precedence over `display-buffer-base-action'.
1496 *** New option `window-combination-limit'.
1497 The new option `window-combination-limit' allows to return the space
1498 obtained for resizing or creating a window more reliably to the window
1499 from which such space was obtained.
1501 *** New option `window-combination-resize'.
1502 The new option `window-combination-resize' allows to split a window that
1503 otherwise cannot be split because it's too small by stealing space from
1504 other windows in the same combination. Subsequent resizing or deletion
1505 of the window will resize all windows in the same combination as well.
1507 *** New option `frame-auto-hide-function' lets you choose between
1508 iconifying or deleting a frame when burying a buffer in a dedicated
1509 frame, or quitting a window showing a buffer in a frame of its own.
1511 *** New commands `maximize-window' and `minimize-window'.
1512 These maximize and minimize the size of a window within its frame.
1514 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
1515 These functions allow to navigate through the live buffers that have
1516 been shown in a specific window.
1518 ** Minibuffer changes
1520 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
1521 This is handy for minibuffer-only frames, and is also used for the feature
1522 where mouse-1 pops up *Messages*"', which can now easily be changed.
1524 *** Minibuffers set `truncate-lines' to nil.
1525 If you want to change the value to something else, you could use
1526 for example `minibuffer-setup-hook'.
1528 ** `auto-mode-case-fold' is now enabled by default.
1530 ** `backup-by-copying-when-mismatch' now defaults to t.
1532 ** New basic faces `error', `warning', `success'.
1533 These are used to highlight text indicating failure, caution or
1534 successful operation.
1536 ** New option `list-colors-sort' defines the color sort order
1537 for `list-colors-display'.
1539 ** The variable `focus-follows-mouse' now always defaults to nil.
1542 * Editing Changes in Emacs 24.1
1546 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
1547 `isearch-yank-line'.
1549 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
1550 `isearch-yank-kill'.
1552 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
1554 ** New commands `count-words-region' and `count-words'.
1556 *** M-= is bound to `count-words-region', not `count-lines-region'.
1557 The `count-words-region' command, when called interactively, reports
1558 the number of lines, words, and characters in the region. It is a
1559 superset of the old `count-lines-region', which is now an obsolete
1562 ** The command `just-one-space' (M-SPC), if given a negative argument,
1563 also deletes newlines around point.
1567 *** New option `delete-active-region'.
1568 If non-nil, [delete] and DEL delete the region if it is active and no
1569 prefix argument is given. If set to `kill', those commands kill
1572 *** New command `delete-forward-char', bound to [delete].
1573 This is meant for interactive use, and obeys `delete-active-region'.
1574 The command `delete-char' does not obey `delete-active-region'.
1576 *** `delete-backward-char' is now a Lisp function.
1577 Apart from obeying `delete-active-region', its behavior is unchanged.
1578 However, the byte compiler now warns if it is called from Lisp; Lisp
1579 callers should use delete-char with a negative argument instead.
1581 *** The option `mouse-region-delete-keys' has been deleted.
1583 ** Selection changes.
1585 The default handling of clipboard and primary selections has been
1586 changed to conform with modern X applications. In short, most
1587 commands for killing and yanking text now use the clipboard, while
1588 mouse commands use the primary selection.
1590 In the following, we provide a list of these changes, followed by a
1591 list of steps to get the old behavior back if you prefer that.
1593 *** `select-active-regions' now defaults to t.
1594 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
1595 the kill ring. The selected text is put in the primary selection, if
1596 the system possesses a separate primary selection facility (e.g. X).
1598 **** `select-active-regions' also accepts a new value, `only'.
1599 This means to only set the primary selection for temporarily active
1600 regions (usually made by mouse-dragging or shift-selection);
1601 "ordinary" active regions, such as those made with C-SPC followed by
1602 point motion, do not alter the primary selection.
1604 **** `mouse-drag-copy-region' now defaults to nil.
1606 *** mouse-2 is now bound to `mouse-yank-primary'.
1607 This pastes from the primary selection, ignoring the kill-ring.
1608 Previously, mouse-2 was bound to `mouse-yank-at-click'.
1610 *** `x-select-enable-clipboard' now defaults to t on all platforms.
1612 *** `x-select-enable-primary' now defaults to nil.
1613 Thus, commands that kill text or copy it to the kill-ring (such as
1614 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
1616 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
1617 exactly equivalent to M-w, C-w, and C-y respectively.
1619 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
1620 non-nil by default, as Windows does not support the primary selection
1621 between applications.
1623 *** To return to the previous behavior, do the following:
1625 **** Change `select-active-regions' to nil.
1626 **** Change `mouse-drag-copy-region' to t.
1627 **** Change `x-select-enable-primary' to t (on X only).
1628 **** Change `x-select-enable-clipboard' to nil.
1629 **** Bind `mouse-yank-at-click' to mouse-2.
1631 *** Support for X cut buffers has been removed.
1633 *** X clipboard managers are now supported.
1634 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
1636 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
1637 in the current rectangle. With a prefix argument, this prompts for a
1638 number to count from and for a format string.
1640 ** `redisplay-dont-pause' now defaults to t.
1641 This makes Emacs feel more responsive to editing commands that arrive
1642 at high rate, e.g. if you lean on some key, because stopping redisplay
1643 in the middle (when this variable is nil) forces more expensive
1644 updates later on, and Emacs appears to be unable to keep up.
1646 ** The behavior of <TAB> for active regions in Text mode has changed.
1647 In Text and related modes, typing <TAB> (`indent-for-tab-command')
1648 when the region is active causes Emacs to indent all the lines in the
1649 region, aligning them with the line previous to the first line in the
1650 region (or with the left margin if there is no previous line).
1652 ** When `occur' is called with a prefix argument, matching strings are
1653 collected into the `*Occur*' buffer without line numbers. If there
1654 are parenthesized subexpressions in the specified regexp, `occur'
1655 reads replacement text that may contain \\& and \\N whose convention
1656 follows `replace-match'.
1659 * Changes in Specialized Modes and Packages in Emacs 24.1
1661 ** Archive Mode has basic support for browsing and updating 7z archives.
1665 *** BibTeX mode now supports biblatex.
1666 Use the variable `bibtex-dialect' to select different BibTeX dialects.
1667 `bibtex-entry-field-alist' is now an obsolete alias for
1668 `bibtex-BibTeX-entry-alist'.
1670 *** New command `bibtex-search-entries', bound to C-c C-a.
1672 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
1674 *** New variable `bibtex-search-entry-globally'.
1678 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
1680 *** The default browser used by the package is now the "xdg-open" program,
1681 on platforms that support it. This calls your desktop's preferred browser.
1685 *** Support for musical notes.
1687 *** Support for logarithmic units.
1689 *** No longer uses the tex prefix for TeX specific unit names when
1690 using TeX or LaTeX mode.
1692 *** New option to highlight selections using faces.
1694 *** `calc-histogram' has the option of using a vector to determine the bins.
1696 *** New "O" option prefix.
1698 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
1700 ** Calendar, Diary, and Appt
1702 *** Diary entries can contain non-printing "comments".
1703 See the variable `diary-comment-start'.
1705 *** Appointments can specify their individual warning times.
1706 See the variable `appt-warning-time-regexp'.
1708 *** The function specified by `appt-disp-window-function' may be passed
1709 lists of arguments if multiple appointments are due at similar times.
1710 If you are using a custom function for this, you should update it.
1712 *** New function `diary-hebrew-birthday'.
1714 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
1715 may no longer be nil, but must all be strings.
1717 *** The obsolete (since Emacs 22.1) method of enabling the appt
1718 package by adding `appt-make-list' to `diary-hook' has been removed.
1719 Use `appt-activate' instead.
1721 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
1722 appt-issue-message (use the function appt-activate)
1723 appt-visible/appt-msg-window (use the variable appt-display-format)
1725 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
1726 view-diary-entries, list-diary-entries, show-all-diary-entries
1730 *** New feature to "guess" the style in an existing buffer.
1731 The main entry point is M-x c-guess.
1733 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
1735 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
1736 Thus C-M-a will, by default, go to the beginning of the immediate function,
1739 *** "Macros with semicolons" can be registered for correct indentation.
1740 Where such a macro ends a line (no semicolon) the next statement is no longer
1741 parsed as a statement continuation.
1743 ** Comint and modes derived from it use the standard completion code.
1747 *** Compilation mode can be used without Font Lock mode.
1748 `compilation-parse-errors-function' is now obsolete.
1750 *** New variable `compilation-filter-start', which is bound while
1751 `compilation-filter-hook' runs. It records the start position of the
1752 text inserted by `compilation-filter'.
1754 *** `compilation-error-screen-columns' and `compilation-first-column'
1755 are obeyed in the editing buffer. So programming language modes can
1756 set them, whereas previously only the value in the *Compilation*
1761 *** Customize buffers now contain a search field.
1762 The search is performed using `customize-apropos'.
1763 To turn off the search field, set `custom-search-field' to nil.
1765 *** Options in customize group buffers start out hidden if not customized.
1766 Use the arrow to the left of the option name to toggle visibility.
1768 *** custom-buffer-sort-alphabetically now defaults to t.
1770 *** The color widget now has a "Choose" button, which allows you to
1771 choose a color via `list-colors-display'.
1775 *** It is now possible to access buses other than the default system
1778 *** The `dbus-register-method' and `dbus-register-property' functions
1779 optionally do not register names.
1781 *** The new function `dbus-register-service' registers a known service
1782 name on a D-Bus without also registering a property or a method.
1786 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
1787 if called with a prefix argument, read a file name from the minibuffer
1788 instead of using the current buffer.
1790 *** The "dired local variables" feature of Dired-x is obsolete.
1791 The standard directory local variables feature replaces it.
1795 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
1796 controlling attempts to autojoin a channel.
1798 *** New variable `erc-coding-system-precedence': If we use `undecided'
1799 as the server coding system, this variable will then be consulted.
1800 The default is to decode strings that can be decoded as utf-8 as
1801 utf-8, and do the normal `undecided' decoding for the rest.
1805 *** The default value of `eshell-directory-name' has changed
1806 to be an "eshell" directory in `user-emacs-directory'.
1807 The old "~/.eshell/" directory is still used if it exists, though.
1811 *** The M-x gdb command now uses the GDB Machine Interface protocol.
1812 It now supports multithread non-stop debugging and simultaneous
1813 debugging of several threads.
1817 *** RET (`image-toggle-animation') toggles animation, if applicable.
1818 Animation plays once, unless the option `image-animate-loop' is non-nil.
1822 *** New command M-x info-display-manual displays a named Info manual.
1823 If that manual is already visited in some Info buffer, it displays
1824 that buffer. (This is handy if you have many manuals in many *info*
1825 buffers, and don't remember the name of the buffer visiting the manual
1826 you want to consult.) Otherwise, it loads and displays the manual.
1828 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
1829 This is for compatibility with the stand-alone Info reader program,
1830 and also because `Info-edit' is a rarely used command that is disabled
1833 ** Mail mode changes (not Message mode)
1835 *** New command M-x mail-add-attachment for adding MIME attachments
1837 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
1838 (Its name is misleading, since it has nothing to do with MIME
1839 attachments.) The old name is now an obsolete alias to the new name.
1841 ** MH-E has been updated to MH-E version 8.3.1.
1842 See MH-E-NEWS for details.
1844 ** Modula-2 mode provides auto-indentation.
1846 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
1848 ** nXML mode no longer binds C-RET to `nxml-complete'.
1849 Completion is now performed via `completion-at-point', bound to C-M-i
1850 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
1851 default), this performs tag completion.
1853 ** Org mode has been updated to version 7.8.09.
1854 See ORG-NEWS for details.
1856 ** Prolog mode has been completely revamped, with lots of additional
1857 functionality such as more intelligent indentation, electricity,
1858 support for more variants, including Mercury, and a lot more.
1862 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
1863 in the Rmail incoming message.
1865 *** The variable `rmail-message-filter' no longer has any effect.
1866 This change was made in Emacs 23.1 but was not advertised at the time.
1867 Try using `rmail-show-message-hook' instead.
1871 *** M-x shell prompts for the shell path name if the default directory
1872 is a remote file name and neither the environment variable $ESHELL nor
1873 the variable `explicit-shell-file-name' is set.
1875 *** TAB is now bound to the standard `completion-at-point' command,
1876 which now implements the pcomplete rules for shell command completion.
1880 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
1881 if the mail server supports them. This uses either built-in GnuTLS
1882 support, or the starttls.el library. Customize `smtpmail-stream-type'
1885 *** The variable `smtpmail-auth-credentials' has been removed.
1886 By default, the information is now stored in the file ~/.authinfo.
1887 This was the default value of smtpmail-auth-credentials. If you had
1888 customized smtpmail-auth-credentials to a list of user names and
1889 passwords, those settings are not used. During your first connection
1890 to the smtp server, Emacs will prompt for the user name and password,
1891 and offer to save them to ~/.authinfo. Or you can manually copy the
1892 credentials to ~/.authinfo. For example, if you had
1894 (setq smtpmail-auth-credentials
1895 '(("mail.example.org" 25 "jim" "s!cret")))
1897 then the equivalent line in ~/.authinfo would be
1899 machine mail.example.org port 25 login jim password s!cret
1901 See the auth-source manual for more information, e.g. on encrypting
1902 the credentials file.
1904 *** The variable `smtpmail-starttls-credentials' has been removed.
1905 If you had that set, you need to put
1907 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
1909 in your ~/.authinfo file instead.
1911 *** SMTPmail defaults to using the address in the From: header as the
1912 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
1913 to the address you wish to use instead.
1917 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
1918 and `sql-oracle-scan-on'.
1920 *** New options controlling prompting for login parameters.
1921 Each supported product has a custom variable `sql-*-login-params',
1922 which is a list of the parameters to be prompted for before a
1923 connection is established.
1925 *** The command `sql-product-interactive' now takes a prefix argument,
1926 which causes it to prompt for an SQL product.
1928 *** Product-specific SQL interactive commands now take prefix arguments.
1929 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
1930 given a prefix argument, prompt for a name for the SQL interactive
1931 buffer. This reduces the need for calling `sql-rename-buffer'.
1933 *** SQL interactive modes suppress command continuation prompts, and
1934 replace tabs with spaces. The first change impacts multiple line SQL
1935 statements entered with C-j between each line, statements yanked into
1936 the buffer and statements sent with `sql-send-*' functions. The
1937 second prevents the MySQL and Postgres interpreters from listing
1938 object name completions when sent text via `sql-send-*' functions.
1940 *** New command `sql-connect' starts a predefined SQLi session,
1941 using the login parameters from `sql-connection-alist'.
1943 *** New "Save Connection" menu item in SQLi buffers.
1944 This gathers the login params specified for the SQLi session, if it
1945 was not started by a connection, and saves them as a new connection.
1947 *** New commands for listing database objects and details:
1948 sql-list-all and sql-list-table.
1950 *** An API for manipulating SQL product definitions has been added.
1954 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
1958 *** New inline access method "ksu" (kerberized su).
1960 *** The following access methods are discontinued: "ssh1_old",
1961 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
1963 *** The user option `remote-file-name-inhibit-cache' controls whether
1964 remote file attributes are cached for better performance.
1966 *** The option `ange-ftp-binary-file-name-regexp' has changed its
1967 default value to "".
1969 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
1970 for remote machines which support SELinux.
1972 ** New function `url-queue-retrieve', which behaves like url-retrieve,
1973 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
1974 the degree of parallelism.
1976 ** VC and related modes
1978 *** Support for pulling on distributed version control systems.
1979 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
1980 supported (currently with Bzr, Git, and Mercurial), to update the
1981 current branch and working tree. A prefix argument means to prompt
1982 the user for specifics, e.g. a pull location.
1984 *** `vc-update' is now an alias for `vc-pull'.
1986 *** Support for merging on distributed version control systems.
1987 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
1988 is supported (currently with Bzr, Git, and Mercurial), to merge
1989 changes from another branch into the current one. It prompts for
1990 specifics, e.g. a merge source.
1992 *** New option `vc-revert-show-diff' controls whether `vc-revert'
1993 shows a diff while querying the user. It defaults to t.
1995 *** Log entries in some Log View buffers can be toggled to display a
1996 longer description by typing RET (log-view-toggle-entry-display).
1997 This is currently supported for Bzr, Git, and Mercurial (to support
1998 another backend, define a `log-view-expanded-log-entry-function').
1999 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2000 use this to display the full log entry for the revision at point.
2002 *** New command `vc-ediff' allows visual comparison of two revisions
2003 of a file similar to `vc-diff', but using ediff backend.
2005 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2006 this was not advertised at the time.
2008 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2009 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2010 this was not advertised at the time.
2016 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2018 *** partial-completion-mode (complete.el) is obsolete.
2019 You can get a comparable behavior with:
2020 (setq completion-styles '(partial-completion initials))
2021 (setq completion-pcm-complete-word-inserts-delimiters t)
2023 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2025 *** pgg is obsolete (use EasyPG instead).
2027 *** sregex.el is obsolete, since rx.el is a strict superset.
2029 *** s-region.el and pc-select.el are obsolete.
2030 They are superseded by shift-select-mode, enabled by default since 23.1.
2032 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2036 *** The Landmark game is now invoked with `landmark', not `lm'.
2037 Its functions and variables have been similarly renamed.
2039 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2040 (This interfered with cua-mode.)
2042 *** f90.el has some support for Fortran 2008 syntax.
2044 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2046 *** New command `nato-region' converts text to NATO phonetic alphabet.
2049 * New Modes and Packages in Emacs 24.1
2051 ** Occur Edit mode applies edits made in *Occur* buffers to the
2052 original buffers. It is bound to "e" in Occur mode.
2054 ** New global minor mode electric-pair-mode.
2055 When enabled, typing an open parenthesis automatically inserts the
2056 matching closing one.
2058 ** New global minor mode electric-indent-mode.
2059 When enabled, typing certain characters triggers reindentation.
2060 Major modes wishing to use this can set electric-indent-chars or
2061 electric-indent-functions.
2063 ** New global minor mode electric-layout-mode.
2064 When enabled, typing certain characters automatically inserts newlines.
2065 Major modes wishing to use this can set electric-layout-rules.
2067 ** tabulated-list.el provides a generic major mode for tabulated data,
2068 from which other modes can be derived.
2070 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2072 ** secrets.el is an implementation of the Secret Service API, an
2073 interface to password managers like GNOME Keyring or KDE Wallet. The
2074 Secret Service API requires D-Bus for communication. The command
2075 `secrets-show-secrets' offers a buffer with a visualization of the
2078 ** notifications.el provides an implementation of the Desktop
2079 Notifications API. It requires D-Bus for communication.
2081 ** soap-client.el supports access to SOAP web services from Emacs.
2082 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2084 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
2086 ** New emacs-lock.el package.
2087 The previous version has been moved to obsolete/old-emacs-lock.el.
2088 Now, there is a proper minor mode `emacs-lock-mode'. Protection
2089 against exiting Emacs and killing the buffer can be set separately.
2090 The mechanism for automatically turning off protection for buffers
2091 with dead inferior processes has been generalized.
2094 * Incompatible Lisp Changes in Emacs 24.1
2096 ** Passing a nil argument to a minor mode function call now ENABLES
2097 the minor mode unconditionally. This is so that you can write e.g.
2099 (add-hook 'text-mode-hook 'foo-mode)
2101 to enable foo-mode in Text mode buffers, removing the need for
2102 `turn-on-foo-mode' style functions. This affects all mode commands
2103 defined by `define-minor-mode'. If called interactively, the mode
2104 command still toggles the minor mode.
2106 ** The return value of `backup-buffer' has changed.
2107 It is now a list of three elements, where the second element is a list
2108 describing the original file's SELinux context. If Emacs or the
2109 system lacks SELinux support, the context list is (nil nil nil nil).
2110 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
2112 ** `char-direction-table' and the `char-direction' function were deleted.
2113 They were buggy and inferior to the new support of bidirectional
2114 editing introduced in Emacs 24. If you need the bidirectional
2115 properties of a character, use `get-char-code-property' with the last
2116 argument `bidi-class'.
2118 ** `copy-directory' now copies the source directory as a subdirectory
2119 of the target directory, if the latter is an existing directory. The
2120 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2121 the contents directly into a pre-existing target directory.
2123 ** For mouse click input events in the text area, the Y pixel
2124 coordinate in the POSITION list now counts from the top of the text
2125 area, excluding any header line. Previously, it counted from the top
2128 ** Support for "old-style" backquotes, obsolete for 10+ years, has
2129 been further reduced. Now a backquote not followed by a space is
2130 always treated as a "new-style" backquote. Please remove all
2131 "old-style" backquotes from your code. If your code uses backquotes
2132 as documented in the Elisp manual, and compiles without warning, then
2133 you have nothing to do in this regard. Code not following the
2134 appropriate conventions may fail to compile.
2136 The most common cause of trouble seems to be an old-style backquote
2137 followed by a newline. Another cause of trouble is vector notation
2138 for key sequence notation: instead of [(control ,)] and [(control ')],
2139 you should write [(control ?,)] and [(control ?')], which will work in
2142 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2143 was not advertised at the time. The function `custom-initialize-delay'
2144 replaced all known uses.
2146 ** `view-buffer' now treats special mode-class in the same way that
2147 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2148 major mode is special).
2150 ** Menu and tool bar changes
2152 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
2153 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2154 With these alist entries omitted, `make-frame' checks the value of the
2155 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2156 a menu-bar or tool-bar, respectively. If the alist entries are added,
2157 they override the value of `menu-bar-mode'/`tool-bar-mode'.
2159 *** The menu bar bindings's caches are not used any more.
2160 Use (where-is-internal <def> nil t) instead.
2162 ** Regions created by mouse dragging are now normal active regions,
2163 similar to those created by shift-selection (see Selection changes
2164 above). In previous Emacs versions, these regions were delineated by
2165 `mouse-drag-overlay'; that variable has been removed.
2167 ** The fourth argument of `filter-buffer-substring' has been removed.
2168 If you want to remove text properties from the final result, simply
2169 pass the result through substring-no-properties.
2171 ** cl.el no longer provides `cl-19'.
2173 ** The following obsolete functions and aliases have been removed
2174 (the appropriate new function is given in parentheses; "not needed"
2175 means you can just remove all calls to the function in question):
2177 *** `comint-kill-output' (`comint-delete-output')
2178 *** `decompose-composite-char' (`char-to-string')
2179 *** `outline-visible' (`outline-invisible-p')
2180 *** `internal-find-face' (`facep')
2181 *** `internal-get-face' (`facep and check-face')
2182 *** `frame-update-faces' (not needed)
2183 *** `frame-update-face-colors' (`frame-set-background-mode')
2184 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2185 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2186 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2187 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2188 *** `x-make-font-unbold' (`make-face-unbold')
2189 *** `x-make-font-unitalic' (`make-face-unitalic')
2190 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2191 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2192 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2193 *** `char-bytes' (== 1)
2194 *** `isearch-return-char' (`isearch-printing-char')
2195 *** `make-local-hook' (not needed)
2196 *** `set-screen-height' (`set-frame-height')
2197 *** `set-screen-width' (`set-frame-width')
2199 ** The following obsolete variables and varaliases have been removed
2200 (the appropriate new variable is given in parentheses):
2202 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2203 *** `vc-header-alist' (`vc-BACKEND-header')
2204 *** `directory-sep-char' (== ?/)
2205 *** `font-lock-defaults-alist' (`font-lock-defaults')
2206 *** `e' (`float-e').
2208 ** The following obsolete files were removed:
2209 sc.el, x-menu.el, rnews.el, rnewspost.el
2211 ** The format of the finder-inf.el file has changed, since the Finder
2212 mechanism is now based on the package system. The variable
2213 `finder-package-info' is replaced by `package--builtins' and
2214 `finder-keywords-hash'.
2216 ** When generating autoloads, `update-directory-autoloads' no longer
2217 assumes every inspected file is in your `load-path'. It instead
2218 generates relative names according to the current `load-path'.
2221 * Lisp changes in Emacs 24.1
2223 ** Code can now use lexical scoping by default instead of dynamic scoping.
2224 The `lexical-binding' variable enables lexical scoping for local
2225 variables. It is typically set via a file-local variable in the first
2226 line of the file, in which case it applies to all the code in that
2229 *** `eval' takes a new optional argument `lexical' to choose the new lexical
2230 binding instead of the old dynamic binding mode.
2232 *** Lexically scoped interpreted functions are represented with a new form
2233 of function value which looks like (closure ENV ARGS &rest BODY).
2235 *** New macro `letrec' to define recursive local functions.
2237 *** `defvar' and `defconst' now mark the variable as special (dynamic).
2238 So do `defcustom' and other forms that call `defvar' as a subroutine.
2240 *** New function `special-variable-p' to check whether a variable is
2241 declared as dynamically bound.
2243 *** The form ((lambda ...) ...) is deprecated.
2245 ** An Emacs Lisp testing tool is now included.
2246 Emacs Lisp developers can use this tool to write automated tests for
2247 their code. See the ERT info manual for details.
2249 ** Changes for bidirectional display and editing
2251 *** New function `current-bidi-paragraph-direction'.
2252 This returns the base direction of the paragraph at point.
2254 *** New function `bidi-string-mark-left-to-right'.
2255 Given a string containing characters from right-to-left scripts, this
2256 function returns another string which can be safely inserted into a
2257 buffer, such that any following text will be always displayed to the
2258 right of that string. (This works by appending an invisible Unicode
2259 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
2261 This is useful when the buffer has overall left-to-right paragraph
2262 direction and you need to insert a string whose contents are not known
2263 in advance, without disrupting the layout of the line.
2267 *** Window tree functions are accessible in Elisp.
2268 Functions are provided to return the parent, siblings or child windows
2269 of any window including internal windows (windows not associated with a
2270 buffer) in the window tree.
2272 **** New function `window-valid-p' gives non-nil for live and internal
2275 **** Window manipulation can deal with internal windows.
2276 Many window handling functions like `split-window', `delete-window', or
2277 `delete-other-windows' as well as the window resizing functions can now
2278 act on any window including internal ones.
2280 *** window-total-height/-width vs window-body-height/-width.
2281 The function `window-height' has been renamed to `window-total-height'
2282 and `window-width' has been renamed to `window-body-width'. The old
2283 names are provided as aliases. Two new functions `window-total-width'
2284 and `window-body-height' are provided.
2286 *** Window parameters specific to window handling functions.
2287 For each window you can specify a parameter to override the default
2288 behavior of a number of functions like `split-window', `delete-window'
2289 and `delete-other-windows'. The variable `ignore-window-parameters'
2290 allows to ignore processing such parameters.
2292 *** New semantics of third argument of `split-window'.
2293 The third argument of `split-window' has been renamed to SIDE and can be
2294 set to any of the values 'below, 'right, 'above, or 'left to make the
2295 new window appear on the corresponding side of the window that shall be
2296 split. Any other value of SIDE will cause `split-window' to split the
2297 window into two side-by-side windows as before.
2299 *** Window resizing functions.
2300 A new standard function for resizing windows called `window-resize' has
2301 been introduced. This and all other functions for resizing windows no
2302 longer delete any windows when they become too small.
2304 *** Deleting the selected window now selects the most recently selected
2305 live window on that frame instead.
2307 *** `adjust-window-trailing-edge' adjustments.
2308 `adjust-window-trailing-edge' can now deal with fixed-size windows and
2309 is able to resize other windows if a window adjacent to the trailing
2310 edge cannot be shrunk any more. This makes its behavior more similar to
2311 that of Emacs 21 without compromising, however, its inability to delete
2312 windows which was introduced in Emacs 22.
2314 *** Window-local buffer lists.
2315 Windows now have local buffer lists. This means that removing a buffer
2316 from display in a window will preferably show the buffer previously
2317 shown in that window with its previous window-start and window-point
2318 positions. This also means that the same buffer may be automatically
2319 shown twice even if it already appears in another window.
2321 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2322 which if non-nil requires the buffer to be displayed in the currently
2323 selected window, signaling an error otherwise. If nil, another window
2324 can be used, e.g. if the selected one is strongly dedicated.
2326 *** `split-window-vertically' and `split-window-horizontally' renamed
2327 to `split-window-below' and `split-window-right' respectively.
2328 The old names are kept as aliases.
2332 **** The second arg to `display-buffer' and `pop-to-buffer' is now
2333 named ACTION, and takes a display action of the same form as
2334 `display-buffer-base-action' (see Changes, above). A non-nil,
2335 non-list value is treated specially, as the old meaning.
2337 **** New variable `display-buffer-overriding-action'.
2339 **** The procedure of `display-buffer' etc. to choose a window is
2340 determined by combining `display-buffer-overriding-action',
2341 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2342 and `display-buffer-fallback-action'. The second and fourth of these
2343 are user-customizable variables.
2345 See the docstring of `display-buffer' for details.
2347 *** New functions `window-state-get' and `window-state-put'.
2348 These functions allow to save and restore the state of an arbitrary
2349 frame or window as an Elisp object.
2353 *** New variable `completion-extra-properties' used to specify extra
2354 properties of the current completion:
2355 - :annotate-function, same as the old completion-annotate-function.
2356 - :exit-function, function to call after completion took place.
2358 *** Functions on `completion-at-point-functions' can return any of the
2359 properties valid for `completion-extra-properties'.
2361 *** `completion-annotate-function' is obsolete.
2363 *** New `metadata' method for completion tables. The metadata thus returned
2364 can specify various details of the data returned by `all-completions':
2365 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
2366 used to select a style in completion-category-overrides.
2367 - `annotation-function' to add annotations in *Completions*.
2368 - `display-sort-function' to specify how to sort entries in *Completions*.
2369 - `cycle-sort-function' to specify how to sort entries when cycling.
2371 *** `minibuffer-local-filename-must-match-map' is not used any more.
2372 Instead, the bindings in `minibuffer-local-filename-completion-map'
2373 are combined with `minibuffer-local-must-match-map'.
2375 *** New variable `completing-read-function' allows overriding the
2376 behavior of `completing-read'.
2378 ** `glyphless-char-display' can now distinguish between graphical and
2379 text terminal display, via a char-table entry that is a cons cell.
2381 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
2382 Instead, the offending function is removed.
2386 *** New function `run-hook-wrapped' for running an abnormal hook by
2387 passing the hook functions as arguments to a "wrapping" function.
2388 Like `run-hook-with-args-until-success', it stops at the first
2389 non-nil return value.
2391 *** New macro `with-wrapper-hook' for running an abnormal hook as a
2392 set of "wrapping" filters, similar to around advice.
2393 (A version of this macro was actually added in Emacs 23.2 but was not
2394 advertised at the time.)
2398 *** New macro `condition-case-unless-debug' (this was actually added in
2399 Emacs 23.1 as condition-case-no-debug, but not advertised)
2401 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
2403 *** Variable `stack-trace-on-error' removed.
2405 *** The debugger can now "continue" from an error, which means it will
2406 jump to the error handler as if the debugger had not been invoked
2407 instead of jumping all the way to the top-level.
2409 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
2410 This can be useful when `inhibit-quit' is set.
2412 ** The new function `server-eval-at' allows evaluation of Lisp forms on
2413 named Emacs server instances.
2415 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
2416 to redirect STDOUT to a file.
2418 ** The function `format-time-string' now supports the %N directive,
2419 for higher-resolution time stamps.
2421 ** New input reading functions
2423 *** New function `read-char-choice' reads a restricted set of
2424 characters, discarding any inputs not inside the set.
2426 *** The command `read-color' now requires a match for a color name
2427 or RGB triplet, instead of signaling an error if the user provides
2430 **** `facemenu-read-color' is now an alias for `read-color'.
2432 ** `image-library-alist' is renamed to `dynamic-library-alist'.
2433 The variable is now used to load all kind of supported dynamic libraries,
2434 not just image libraries. The previous name is still available as an
2437 ** Syntax parsing changes
2439 *** New variable `syntax-propertize-function'.
2440 This replaces `font-lock-syntactic-keywords' which is now obsolete.
2441 This allows syntax-table properties to be set independently from font-lock:
2442 just call syntax-propertize to make sure the text is propertized.
2443 Together with this new variable come a new hook
2444 syntax-propertize-extend-region-functions, as well as two helper functions:
2445 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
2446 as-is; and syntax-propertize-rules which provides a new way to specify
2449 *** Syntax tables support a new "comment style c" additionally to style b.
2451 ** New hook `post-self-insert-hook', run after `self-insert-command'.
2453 ** frame-local variables cannot be let-bound any more.
2455 ** Major and minor mode changes
2457 *** `set-auto-mode' now respects mode: local variables at the end of files,
2458 as well as those in the -*- line.
2460 *** `prog-mode' is a new major mode from which programming modes
2463 **** `prog-mode-hook' can be used to enable features for programming
2464 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
2465 on-the-fly spell checking for comments and strings.
2467 *** New hook `change-major-mode-after-body-hook', run by
2468 `run-mode-hooks' just before any other mode hooks.
2470 *** Enabled globalized minor modes can be disabled in specific major modes.
2471 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
2472 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
2474 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
2476 ** File-handling changes
2478 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
2479 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
2480 both non-nil. Interactively, TRASH defaults to t, unless a prefix
2481 argument is supplied (see Trash changes, above).
2483 *** New file predicates: `file-equal-p', `file-in-directory-p'.
2485 ** Tool-bars can display separators.
2486 Tool-bar separators are handled like menu separators in menu-bar maps,
2487 i.e. via menu entries of the form `(menu-item "--")'.
2491 *** Animated images support (currently animated gifs only).
2493 **** `image-animated-p' returns non-nil if an image can be animated.
2495 **** `image-animate' animates a supplied image spec.
2497 **** `image-animate-timer' returns the timer object for an image that
2500 *** `image-extension-data' has been renamed to `image-metadata'.
2501 The old name is an obsolete alias to the new one.
2503 *** Image mode can view any image type that ImageMagick supports.
2504 This requires Emacs to be built with ImageMagick support.
2506 **** New function `imagemagick-types', defined if ImageMagick support
2507 is enabled, returns a list of image file extensions that your
2508 ImageMagick installation supports.
2510 **** New function `imagemagick-register-types' enables ImageMagick
2511 image types in Image mode and in `create-image' and other helper
2514 **** New option `imagemagick-types-inhibit' excludes certain
2515 ImageMagick image types from `imagemagick-register-types'.
2517 **** With ImageMagick support, there are extra Image mode commands to
2518 resize and rotate images: `image-transform-fit-to-height',
2519 `image-transform-fit-to-width', `image-transform-set-rotation', and
2520 `image-transform-set-scale'.
2522 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
2523 passes it to the mail user agent function. This argument specifies an
2524 action for returning to the caller after finishing with the mail. For
2525 example, this is used by Rmail to optionally delete a mail window.
2527 ** XML and HTML parsing
2528 If Emacs is compiled with libxml2 support, there are two new
2529 functions: `libxml-parse-html-region' (which parses "real world" HTML)
2530 and `libxml-parse-xml-region' (which parses XML). Both return an
2531 Emacs Lisp parse tree.
2533 ** Networking and encryption changes
2535 *** `open-network-stream' can now be used to open an encrypted stream.
2536 It now accepts an optional `:type' parameter for initiating a TLS
2537 connection, directly or via STARTTLS. To do STARTTLS, additional
2538 parameters (`:end-of-command', `:success', `:capabilities-command')
2539 must also be supplied.
2541 *** New library gnutls.el.
2542 The new function `gnutls-available-p' returns non-nil if Emacs is
2543 built with GnuTLS support. The main entry points are
2544 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
2545 these functions through `open-network-stream', because that can
2546 upgrade connections through STARTTLS opportunistically or use plain
2547 SSL, depending on your needs. For debugging, set `gnutls-log-level'
2550 *** New primitive `secure-hash' that supports many secure hash algorithms:
2551 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
2552 sha1.el has been removed. The `sha1' feature is provided by default.
2556 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
2558 ** Progress reporters can now "spin".
2559 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
2560 now be nil, or omitted. This makes a "non-numeric" reporter. Each
2561 time you call `progress-reporter-update' on that progress reporter,
2562 with a nil or omitted VALUE argument, the reporter message is
2563 displayed with a "spinning bar".
2565 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
2566 being reverted, even if the buffer has a local `revert-buffer-function'.
2568 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
2569 If delayed-warnings-list is non-nil, the command loop calls
2570 `delayed-warnings-hook' after `post-command-hook'. At present, this
2571 is only used by Emacs on some platforms to display warnings during
2572 startup, which might otherwise not be noticed. This uses the
2573 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
2575 ** rx.el has a new `group-n' construct for explicitly numbered groups.
2577 ** New function `make-composed-keymap' that constructs a new keymap
2578 from multiple input maps. You can use this to make a keymap that
2579 inherits from multiple maps, eg:
2580 (set-keymap-parent newmap (make-composed-keymap othermap parent))
2582 ** New function `string-prefix-p'.
2583 (This was actually added in Emacs 23.2 but was not advertised at the time.)
2585 ** New reader macro ## that stands for the empty symbol.
2586 This means that the empty symbol can now be read back. Also, #: by itself
2587 (when not immediately followed by a possible symbol character) stands for
2588 an empty uninterned symbol.
2590 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
2592 ** The following functions and variables are obsolete:
2594 *** `tooltip-use-echo-area' is obsolete.
2595 Rather than setting this to t, disable Tooltip mode instead.
2597 *** buffer-substring-filters is obsolete.
2598 Use `filter-buffer-substring-functions' instead.
2600 *** `byte-compile-disable-print-circle' is obsolete.
2602 *** `deferred-action-list' and `deferred-action-function' are obsolete.
2603 Use `post-command-hook' instead.
2605 *** `font-lock-maximum-size' is obsolete.
2608 * Changes in Emacs 24.1 on non-free operating systems
2610 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
2611 and also when HOME is set to C:\ by default.
2613 ** New configure.bat options
2615 *** --enable-checking builds Emacs with extra runtime checks.
2617 *** --distfiles specifies files to be included in binary distribution.
2619 *** --without-gnutls disables automatic GnuTLS detection.
2621 *** --lib for general library linkage, works with the USER_LIBS build variable.
2623 ** New make target `dist' to create binary distribution for MS Windows.
2625 ** The Lisp function `w32-default-color-map' is now obsolete.
2626 (It is only used internally in the Emacs C code.)
2628 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
2629 reappear on mouse-over. (Requires OS X 10.6 or later.)
2631 ** On Mac OS X, dragging a file into Emacs visits the file, like on
2632 other platforms, rather than inserting its contents into the buffer.
2635 ----------------------------------------------------------------------
2636 This file is part of GNU Emacs.
2638 GNU Emacs is free software: you can redistribute it and/or modify
2639 it under the terms of the GNU General Public License as published by
2640 the Free Software Foundation, either version 3 of the License, or
2641 (at your option) any later version.
2643 GNU Emacs is distributed in the hope that it will be useful,
2644 but WITHOUT ANY WARRANTY; without even the implied warranty of
2645 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2646 GNU General Public License for more details.
2648 You should have received a copy of the GNU General Public License
2649 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2654 paragraph-separate: "[
\f]*$"