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 ** If the new variable `enable-dir-local-variables' is nil,
49 directory local variables are ignored. May be useful for some modes
50 that want to ignore directory-locals while still respecting file-locals.
52 ** The option `set-mark-default-inactive' has been deleted.
53 This unfinished feature was introduced by accident in Emacs 23.1;
54 simply disabling Transient Mark mode does the same thing.
56 ** `initial-buffer-choice' can now specify a function to set up the
59 ** ACL support has been added.
61 *** Emacs preserves the ACL entries of files when backing up.
63 *** New functions `file-acl' and `set-file-acl' get and set the ACL
64 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
65 libacl. On MS-Windows, the NT Security APIs are used to emulate the
68 ** New option `scroll-bar-adjust-thumb-portion'.
69 Available only on X, this option allows to control over-scrolling
70 using the scroll bar (i.e. dragging the thumb down even when the end
71 of the buffer is visible).
74 * Editing Changes in Emacs 24.4
76 ** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
77 bound to <f11> and M-<f10>, respectively.
79 ** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
83 * Changes in Specialized Modes and Packages in Emacs 24.4
85 ** Delphi mode is now called OPascal mode.
86 *** All delphi-* variables and functions have been renamed to opascal-*.
87 *** `delphi-newline-always-indents' is not supported any more
88 use `electric-indent-mode' instead.
89 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
91 ** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
93 ** completing-read-multiple's separator can now be a regexp.
94 The default separator is changed to allow surrounding spaces around the comma.
98 *** Battery information via the BSD `apm' utility is now supported.
102 *** New macro cl-tagbody.
105 *** letf is now just an alias for cl-letf.
109 *** Calc by default now uses the Gregorian calendar for all dates, and
110 uses January 1, 1 AD as its day number 1. Previously Calc used the
111 Julian calendar for dates before September 14, 1752, and it used
112 December 31, 1 BC as its day number 1; the new scheme is more
113 consistent with Calendar's calendrical system and day numbering.
115 *** The new variable `calc-gregorian-switch' lets you configure the
116 date when Calc switches from the Julian to the Gregorian calendar.
117 Nil, the default value, means to always use the Gregorian calendar.
118 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
121 *** Support for ISO 8601 dates.
125 *** New minor mode `dired-hide-details-mode' hides details.
129 *** New option `erc-accidental-paste-threshold-seconds'.
130 If set to a number, this can be used to avoid accidentally paste large
131 amounts of data into the ERC input.
133 ** Icomplete is a bit more like IDO.
134 *** key bindings to navigate through and select the completions.
135 *** The icomplete-separator is customizable, and its default has changed.
136 *** Removed icomplete-show-key-bindings.
140 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
141 visit the next image file and the previous image file in the same
142 directory, respectively.
145 *** The command `image-mode-fit-frame' deletes other windows.
146 When toggling, it restores the frame's previous window configuration.
147 It also has an optional frame argument, which can be used by Lisp
148 callers to fit the image to a frame other than the selected frame.
152 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
153 and adds it to the search string.
155 ** MH-E has been updated to MH-E version 8.4.
156 See MH-E-NEWS for details.
159 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
160 Customize `unrmail-mbox-format' to change this.
163 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
164 of how Rmail displays non-MIME messages.
167 ** New function `ses-rename-cell' to give SES cells arbitrary names.
169 ** trace-function was largely rewritten.
170 New features include:
171 - no prompting for the destination buffer, unless a prefix-arg was used.
172 - additionally to prompting for a destination buffer, when a prefix-arg is
173 used, the user can enter a "context", i.e. Lisp expression whose value at the
174 time the function is entered/exited will be printed along with the function
175 name and arguments. Useful to trace the value of (current-buffer) or
176 (point) when the function is invoked.
178 ** New command `delete-duplicate-lines' has two types of operation:
179 when its arg ADJACENT is non-nil (when called interactively with C-u C-u)
180 it works like the utility `uniq'. Otherwise by default it deletes
181 duplicate lines everywhere in the region without regard to adjacency.
183 ** New `cycle-spacing' command allows cycling between having just one
184 space, no spaces, or reverting to the original spacing. Like
185 `just-one-space' command it can handle or ignore newlines and
186 leave different number of spaces.
190 *** New connection method "adb", which allows to access Android
191 devices by the Android Debug Bridge. The variable `tramp-adb-sdk-dir'
192 must be set to the Android SDK installation directory.
194 *** Handlers for `file-acl' and `set-file-acl' for remote machines
195 which support POSIX ACLs.
199 *** The commands `woman-default-faces' and `woman-monochrome-faces'
200 are obsolete. Customize the `woman-* faces instead.
202 ** Obsolete packages:
204 *** longlines.el is obsolete; use visual-line-mode instead.
206 *** terminal.el is obsolete; use term.el instead.
209 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
212 * New Modes and Packages in Emacs 24.4
213 ** New nadvice.el package offering lighter-weight advice facilities.
215 - add-function/remove-function which can be used to add/remove code on any
216 function-carrying place, such as process-filters or `<foo>-function' hooks.
217 - advice-add/advice-remove to add/remove a piece of advice on a named function,
218 much like `defadvice' does.
221 * Incompatible Lisp Changes in Emacs 24.4
223 ** Removed inhibit-local-menu-bar-menus.
225 ** frame-local variables that affect redisplay do not work any more.
226 More specifically, the redisplay does not bother to check for a frame-local
227 value when looking up variables.
229 ** nil and "unbound" are indistinguishable in symbol-function.
230 `symbol-function' never signals `void-function' any more.
231 `fboundp' returns non-nil if the symbol was `fset' to nil.
233 ** `defadvice' does not honor the `freeze' flag and cannot advise
234 special-forms any more.
236 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
237 VAR was bound to nil which was not tremendously useful and just lead to
238 spurious warnings about an unused var.
240 ** The return value of `backup-buffer' has changed.
241 The second argument is no longer an SELinux context, instead it is an
242 alist of extended attributes as returned by the new function
243 `file-extended-attributes'. The attributes can be applied to another
244 file using `set-file-extended-attributes'.
247 * Lisp Changes in Emacs 24.4
249 ** Support for filesystem notifications.
250 Emacs now supports notifications of filesystem changes, such as
251 creation, modification, and deletion of files. This requires the
252 'inotify' API on GNU/Linux systems. On MS-Windows systems, this is
253 supported for Windows XP and newer versions.
255 ** Changes in autorevert.el
258 *** If Emacs is compiled with file notification support, notifications
259 are used instead of checking the time stamp of the files. You can
260 disable this by setting the user option `auto-revert-use-notify' to
261 nil. Alternatively, a regular expression of directories to be
262 excluded from file notifications can be specified by
263 `auto-revert-notify-exclude-dir-regexp'.
266 *** The new user option `auto-revert-remote-files' enables reversion
267 of remote files when set to non-nil.
271 *** The `face-spec-set' is now analogous to `setq' for face specs.
272 Its third arg now accepts values specifying exactly which face spec to
273 set (defface, custom, or user spec), and it directly sets the relevant
274 property using the supplied face spec.
276 *** Face specs set via Custom themes now replace the `defface' spec
277 rather than inheriting from it (as do face specs set via Customize).
279 *** New face characteristic (supports :underline (:style wave))
280 specifies whether or not the terminal can display a wavy line.
282 ** time-to-seconds is not obsolete any more.
283 ** New function special-form-p.
284 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
285 text-property on the first char.
287 ** The `defalias-fset-function' property lets you catch calls to defalias
288 and redirect them to your own function instead of `fset'.
290 ** The 9th element returned by `file-attributes' is now unspecified.
291 Formerly, it was t if the file's gid would change if file were deleted
292 and recreated. This value has been inaccurate for years on many
293 platforms, and nobody seems to have noticed or cared.
295 ** The function `file-ownership-preserved-p' now has an optional
296 argument GROUP which causes it check for file group too. This can be
297 used in place of the 9th element of `file-attributes'.
299 ** New functions `group-gid' and `group-real-gid'.
301 ** The 6th argument to `copy-file' has been renamed to
302 `preserve-extended-attributes' as it now handles both SELinux context
306 * Changes in Emacs 24.4 on Non-Free Operating Systems
309 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
310 The backtrace is written to the 'emacs_backtrace.txt' file in the
311 directory where Emacs was running.
314 ** The variable `buffer-file-type' is no longer supported.
315 Setting it has no effect, and %t in the mode-line format is ignored.
316 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
317 modifying it has no effect.
319 ** Improved fullscreen support on Mac OS X.
320 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
321 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
322 native is the default.
325 * Installation Changes in Emacs 24.3
327 ** The default X toolkit is now Gtk+ version 3.
328 If you don't pass `--with-x-toolkit' to configure, or if you use
329 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
330 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
331 You can explicitly require a specific version by passing
332 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
334 ** New configure option `--enable-link-time-optimization', to utilize
335 an appropriate feature provided by GCC since version 4.5.0.
337 ** New configure option `--without-all' to disable most of the optional
338 features (image support, etc.) that are normally enabled by default.
340 ** New configure option `--enable-gcc-warnings' (for developing/debugging
341 Emacs). If building with GCC, this enables compile-time checks that
342 warn/give errors about possibly-questionable C code. On a recent GNU
343 system there should be no warnings; on older and on non-GNU systems
344 the results may be useful to developers.
346 ** The configure option `--enable-use-lisp-union-type' has been
347 renamed to `--enable-check-lisp-object-type', as the resulting
348 Lisp_Object type no longer uses a union to implement the compile time
349 check that this option enables.
351 ** The configure option `--disable-maintainer-mode' has been removed,
352 as it was confusingly-named and rarely useful.
354 ** The configure options `--program-prefix', `--program-suffix', and
355 `--program-transform-name' apply to more than just the installed
356 binaries. Now they also affect the man pages, icons, and the
357 etc/emacs.desktop file; but not the info pages, since this would break
358 links between the various manuals.
360 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
361 overwriting "emacs" in the installation bin/ directory with a link
364 ** Emacs uses libtinfo in preference to libncurses, if available.
366 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
367 /usr/pkg/lib to the linker search path. You must add them yourself if
370 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
371 (from the bin and libexec directories, respectively). The former is
372 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
375 * Startup Changes in Emacs 24.3
377 ** Emacs no longer searches for `leim-list.el' files beneath the standard
378 lisp/ directory. There should not be any there anyway. If you have
379 been adding them there, put them somewhere else; e.g., site-lisp.
381 ** The `--no-site-lisp' command line option now works for Nextstep builds.
384 * Changes in Emacs 24.3
388 *** `C-h f' (`describe-function') can now perform autoloading.
389 When this command is called for an autoloaded function whose docstring
390 contains a key substitution construct, that function's library is
391 automatically loaded, so that the documentation can be shown
392 correctly. To disable this, set `help-enable-auto-load' to nil.
394 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
395 even after their associated libraries have been loaded (and the
396 autoloads have been redefined as functions).
400 *** Images displayed via ImageMagick now support transparency and the
401 :background image specification property.
403 *** When available, ImageMagick support is automatically enabled.
404 It is no longer necessary to call `imagemagick-register-types'
405 explicitly to install ImageMagick image types; that function is called
406 automatically at startup, or when customizing an imagemagick- option.
408 *** Setting `imagemagick-types-inhibit' to t now disables the use of
409 ImageMagick to view images. (You must call `imagemagick-register-types'
410 afterwards if you do not use customize to change this.)
412 *** The new variable `imagemagick-enabled-types' also affects which
413 ImageMagick types are treated as images. The function
414 `imagemagick-filter-types' returns the list of types that will be
419 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
420 next and previous path separator, respectively.
422 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
423 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
424 non-nil before enabling the mode.
428 *** New option `mode-line-default-help-echo' specifies the help text
429 (shown in a tooltip or in the echo area) for any part of the mode line
430 that does not have its own specialized help text.
432 *** You can now click mouse-3 in the coding system indicator to invoke
433 `set-buffer-file-coding-system'.
437 *** emacsclient now obeys string values for `initial-buffer-choice',
438 if it is told to open a new frame without specifying any file to visit
439 or expression to evaluate.
441 *** New option `server-auth-key' specifies a shared server key.
443 ** Emacs now generates backtraces on fatal errors.
444 On encountering a fatal error, Emacs now outputs a textual description
445 of the fatal signal, and a short backtrace on platforms like glibc
446 that support backtraces.
448 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
449 This minor mode replaces `toggle-read-only', which is now obsolete.
451 ** Most `y-or-n' prompts now allow you to scroll the selected window.
452 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
453 respectively, without exiting from the prompt.
455 ** In the Package Menu, newly-available packages are listed as "new",
456 and sorted above the other "available" packages by default.
458 ** If your Emacs was built from a bzr checkout, the new variable
459 `emacs-bzr-version' contains information about the bzr revision used.
461 ** New option `create-lockfiles' specifies usage of lockfiles.
462 It defaults to t. Changing it to nil inhibits the creation of lock
463 files (use this with caution).
465 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
466 variables on remote hosts.
468 ** The entry for PCL-CVS has been removed from the Tools menu.
469 The PCL-CVS commands are still available via the keyboard.
471 ** Using "unibyte: t" in Lisp source files is obsolete.
472 Use "coding: raw-text" instead.
474 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
475 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
476 The previous binding, introduced in Emacs 24.1, was a mistake, because
477 `C-c LETTER' bindings are reserved for user customizations.
479 ** Internationalization
481 *** New language environment: Persian.
483 *** New input method `vietnamese-vni'.
485 ** Nextstep (GNUstep / Mac OS X) port
487 *** Support for fullscreen and the frame parameter fullscreen.
489 *** A file dialog is used for open/save operations initiated from the
493 * Editing Changes in Emacs 24.3
495 ** Search and Replace
497 *** Non-regexp Isearch now performs "lax" space matching.
498 Each sequence of spaces in the supplied search string may match any
499 sequence of one or more whitespace characters, as specified by the
500 variable `search-whitespace-regexp'. (This variable is also used by a
501 similar existing feature for regexp Isearch.)
503 *** New Isearch command `M-s SPC' toggles lax space matching.
504 This applies to both ordinary and regexp Isearch.
506 *** New option `replace-lax-whitespace'.
507 If non-nil, `query-replace' uses flexible whitespace matching too.
510 *** Global `M-s _' starts a symbol (identifier) incremental search,
511 and `M-s _' in Isearch toggles symbol search mode.
512 `M-s c' in Isearch toggles search case-sensitivity.
514 ** Navigation commands
516 *** New binding `M-g c' for `goto-char'.
518 *** New binding `M-g TAB' for `move-to-column'.
520 *** `M-g TAB' (`move-to-column') prompts for a column number if called
521 interactively with no prefix arg. Previously, it moved to column 1.
523 ** New option `yank-handled-properties' allows processing of text
524 properties on yanked text, in ways that are more general than just
525 removing them (as is done by `yank-excluded-properties').
527 ** New option `delete-trailing-lines' specifies whether
528 M-x delete-trailing-whitespace should delete trailing lines at the end
529 of the buffer. It defaults to t.
531 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
533 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
534 `ucs-insert' is now an obsolete alias for `insert-char'.
536 ** The `z' key no longer has a binding in most special modes.
537 It used to be bound to `kill-this-buffer', but `z' is too easy to
540 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
541 It copies the region-rectangle as the last rectangle kill.
545 *** `C-x r +' is now overloaded to invoke `append-to-register'.
547 *** New option `register-separator' specifies the register containing
548 the text to put between collected texts for use with
549 M-x append-to-register and M-x prepend-to-register.
552 * Changes in Specialized Modes and Packages in Emacs 24.3
554 ** Common Lisp emulation (CL)
556 *** CL's main entry is now (require 'cl-lib).
557 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
558 i.e., all its definitions have the "cl-" prefix (and internal definitions
559 use the "cl--" prefix).
561 If `cl' provided a feature under the name `foo', then `cl-lib'
562 provides it under the name `cl-foo' instead; with the exceptions of the
563 few `cl' definitions that had to use `foo*' to avoid conflicts with
564 pre-existing Elisp entities. These have been renamed to `cl-foo'
565 rather than `cl-foo*'.
567 The old `cl' is now deprecated and is mainly just a bunch of aliases that
568 provide the old, non-prefixed names. Some exceptions are listed below:
570 *** `cl-flet' is not like `flet' (which is deprecated).
571 Instead it obeys the behavior of Common-Lisp's `flet'.
572 In particular, in cl-flet function definitions are lexically scoped,
573 whereas in flet the scoping is dynamic.
575 *** `cl-labels' is slightly different from `labels'.
576 The difference is that it relies on the `lexical-binding' machinery
577 (as opposed to the `lexical-let' machinery used previously) to capture
578 definitions in closures, so such closures will only work if `lexical-binding'
581 *** `cl-letf' is not exactly like `letf'.
582 The only difference is in details that relate to some deprecated usage
583 of `symbol-function' in place forms.
585 *** `progv' was rewritten to use the `let' machinery.
586 A side effect is that variables without corresponding values are bound
587 to nil rather than being made unbound.
589 *** The following methods of extending `setf' are obsolete
590 (use features from gv.el instead):
591 `define-modify-macro' (use `gv-letplace')
592 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
593 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
594 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
598 *** Changes are now highlighted using the same color scheme as in
599 modern VCSes. Deletions are displayed in red (new faces
600 `diff-refine-removed' and `smerge-refined-removed', and new definition
601 of `diff-removed'), insertions in green (new faces `diff-refine-added'
602 and `smerge-refined-added', and new definition of `diff-added').
604 *** The variable `diff-use-changed-face' defines whether to use the
605 face `diff-changed', or `diff-removed' and `diff-added' to highlight
606 changes in context diffs.
608 *** The new command `diff-delete-trailing-whitespace' removes trailing
609 whitespace introduced by a diff.
611 ** Ediff now uses the same color scheme as Diff mode.
615 A new version of python.el, which provides several new features, including:
616 per-buffer shells, better indentation, Python 3 support, and improved
617 shell-interaction compatible with iPython (and virtually any other
620 *** Some user options have been replaced/renamed, including (old -> new):
621 **** python-indent -> python-indent-offset
622 **** python-guess-indent -> python-indent-guess-indent-offset
623 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
624 **** python-use-skeletons -> python-skeleton-autoinsert
626 *** Some user options have been removed, including:
628 **** `python-indent-string-contents': Strings are never indented.
630 **** `python-honour-comment-indentation':
631 Comments are always considered as indentation markers.
633 **** `python-continuation-offset': Indentation is automatically
634 calculated in a pep8 compliant way depending on the context.
636 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
637 Have no direct mapping as the shell interaction is completely different.
639 **** `python-python-command', `python-jython-command':
640 Replaced by `python-shell-interpreter'.
642 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
643 `python-pdbtrack-minor-mode-string', `python-source-modes':
646 *** Some commands have been replaced (old -> new):
647 **** python-insert-class -> python-skeleton-class
648 **** python-insert-def -> python-skeleton-def
649 **** python-insert-for -> python-skeleton-for
650 **** python-insert-if -> python-skeleton-if
651 **** python-insert-try/except -> python-skeleton-try
652 **** python-insert-try/finally -> python-skeleton-try
653 **** python-insert-while -> python-skeleton-while
654 **** python-find-function -> python-nav-jump-to-defun
655 **** python-next-statement -> python-nav-forward-sentence
656 **** python-previous-statement -> python-nav-backward-sentence
657 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
658 **** python-end-of-defun-function -> python-nav-end-of-defun
659 **** python-send-buffer -> python-shell-send-buffer
660 **** python-send-defun -> python-shell-send-defun
661 **** python-send-region -> python-shell-send-region
662 **** python-send-region-and-go -> emulate with python-shell-send-region
663 and python-shell-switch-to-shell
664 **** python-send-string -> python-shell-send-string
665 **** python-switch-to-python -> python-shell-switch-to-shell
666 **** python-describe-symbol -> python-eldoc-at-point
670 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
672 *** The D-Bus object manager interface is implemented.
674 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
675 if their value does not fit into Emacs's integer range.
677 *** The function `dbus-call-method' is now non-blocking.
678 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
680 *** Signals can also be sent as unicast messages.
682 *** The argument list of `dbus-register-signal' has been extended,
683 according to the new match rule types of D-Bus.
685 *** `dbus-init-bus' supports private connections.
687 *** There is a new function `dbus-setenv'.
689 ** `desktop-path' no longer includes the "." directory.
690 Desktop files are now located in ~/.emacs.d by default.
694 *** `dired-do-async-shell-command' executes each file sequentially
695 if the command ends in `;' (when operating on multiple files).
696 Otherwise, it executes the command on each file in parallel.
698 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
699 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
702 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
703 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
704 mark/unmark/flag all files in the active region.
706 *** The minibuffer default for `=' (`dired-diff) has changed.
707 It is now the backup file for the file at point, if one exists.
708 In Transient Mark mode the default is the file at the active mark.
710 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
711 The global binding for `M-=', `count-words-region' is in effect.
715 *** New module "notifications", which can send a notification when you
716 receive a private message or your nickname is mentioned.
718 *** ERC will look up server/channel names via auth-source and use any
721 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
722 only applies to messages sent by lurkers.
724 ** reStructuredText mode
726 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
727 fontification, comment handling, and customization have all been revised
730 *** Support for `imenu' and `which-function-mode'.
732 *** The reStructuredText syntax is more closely covered.
733 Sphinx support has been improved.
735 *** `rst-insert-list' inserts new list or continues existing lists.
737 *** A negative prefix argument always works for `rst-adjust'.
739 *** The window configuration is reset after displaying a TOC.
741 *** The constant `rst-version' describes the rst.el package version.
745 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
747 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
749 *** `sh-use-smie' lets you choose a new indentation and navigation code.
753 *** The free software compiler GHDL is supported (and now the default).
755 *** Support for the VHDL-AMS packages has been added/updated.
757 *** Updated to the 2002 revision of the VHDL standard.
759 *** Accepts \r and \f as whitespace.
763 *** The faces used by Apropos are now directly customizable.
764 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
765 see the `apropos' Custom group for details.
767 *** The old options whose values specified faces to use have been removed
768 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
772 *** This package has been rewritten to use Tabulated List mode.
774 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
775 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
779 *** Algebraic simplification mode is now the default.
780 To restrict to the limited simplifications given by the former
781 default simplification mode, use `m I'.
785 *** You can customize the header text that appears above each calendar month.
786 See the variable `calendar-month-header'.
788 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
790 *** The calendars produced by cal-html include holidays.
791 Customize `cal-html-holidays' to change this.
793 ** Compile has a new option `compilation-always-kill'.
797 *** `custom-reset-button-menu' now defaults to t.
799 *** Non-option variables are never matched in `customize-apropos' and
800 `customize-apropos-options' (i.e., the prefix argument does nothing for
805 *** The variables `term-default-fg-color' and `term-default-bg-color'
806 are now deprecated in favor of the customizable face `term'.
808 *** You can customize how to display ANSI terminal colors and styles
809 by customizing the corresponding `term-color-<COLOR>',
810 `term-color-underline' and `term-color-bold' faces.
814 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
816 *** Remote processes are now also supported on remote MS-Windows hosts.
820 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
821 Previously, this slot stored semicolon-separated attribute-value pairs
822 appended to some imap URLs, but this is not compatible with RFC 3986.
823 So now the `filename' slot stores the entire path and query components,
824 and the `attributes' slot is always nil.
826 *** New function `url-encode-url' for encoding a URI string.
827 The `url-retrieve' function now uses this to encode its URL argument,
828 in case that is not properly encoded.
830 ** notifications.el supports now version 1.2 of the Notifications API.
831 The function `notifications-get-capabilities' returns the supported
834 ** Flymake uses fringe bitmaps to indicate errors and warnings.
835 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
836 `flymake-warning-bitmap'.
838 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
839 specifying URL types that should be converted to remote file names at
840 the FFAP prompt. The default is now '("ftp").
842 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
843 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
845 ** New option `mouse-avoidance-banish-position' specifies where the
846 `banish' mouse avoidance setting moves the mouse.
848 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
849 closing brackets to be aligned with the line of the opening bracket.
851 ** In Proced mode, new command `proced-renice' renices marked processes.
853 ** New option `async-shell-command-buffer' specifies the buffer to use
854 for a new asynchronous `shell-command' when the default output buffer
855 `*Async Shell Command*' is already in use.
857 ** SQL mode has a new option `sql-db2-escape-newlines'.
858 If non-nil, newlines sent to the command interpreter will be escaped
859 by a backslash. The default does not escape the newlines and assumes
860 that the sql statement will be terminated by a semicolon.
862 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
863 (and modes that derive from it), sorts the column at point, or the Nth
864 column if a numeric prefix argument is given.
866 ** `which-func-modes' now defaults to t, so Which Function mode, when
867 enabled, applies to all applicable major modes.
869 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
872 ** Follow mode no longer works by using advice.
873 The option `follow-intercept-processes' has been removed.
875 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
877 ** Hooks renamed to avoid obsolete "-hooks" suffix:
878 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
879 *** semantic-change-hooks -> semantic-change-functions
880 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
881 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
882 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
883 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
884 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
885 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
886 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
887 *** rcirc-activity-hooks -> rcirc-activity-functions
888 *** rcirc-print-hooks -> rcirc-print-functions
889 *** dbus-event-error-hooks -> dbus-event-error-functions
890 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
891 *** checkdoc-style-hooks -> checkdoc-style-functions
892 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
893 *** archive-extract-hooks -> archive-extract-hook
894 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
895 *** hfy-post-html-hooks -> hfy-post-html-hook
896 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
897 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
898 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
899 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
904 In most cases, assoc+member+push+delq work just as well.
905 And in any case it's just a terrible package: ugly semantics, terrible
906 inefficiency, and not namespace-clean.
915 * Incompatible Lisp Changes in Emacs 24.3
917 ** Docstrings starting with `*' no longer indicate user options.
918 Only variables defined using `defcustom' are considered user options.
919 The function `user-variable-p' is now an obsolete alias for
922 ** The return values of `defalias', `defun' and `defmacro' have changed,
923 and are now undefined. For backwards compatibility, `defun' and
924 `defmacro' currently return the name of the newly defined
925 function/macro, but this should not be relied upon.
927 ** `random' by default now returns a different random sequence in
928 every Emacs run. Use `(random S)', where S is a string, to set the
929 random seed to a value based on S, in order to get a repeatable
930 sequence in later calls.
932 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
933 that substring is inserted literally even if the LITERAL arg is
934 non-nil, instead of causing an error to be signaled.
936 ** `select-window' now always makes the window's buffer current.
937 It does so even if the window was selected before.
939 ** The function `x-select-font' can return a font spec, instead of a
940 font name as a string. Whether it returns a font spec or a font name
941 depends on the graphical library.
943 ** `face-spec-set' no longer sets frame-specific attributes when the
944 third argument is a frame (that usage was obsolete since Emacs 22.2).
946 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
948 ** The CL package's `get-setf-method' function no longer exists.
949 Generalized variables are now part of core Emacs Lisp, and implemented
950 differently to the way cl.el used to do it. It is not possible to
951 define a compatible replacement for `get-setf-method'. See the file
952 gv.el for internal details of the new implementation.
954 ** The arguments of `dbus-register-signal' are no longer just strings,
955 but keywords or keyword-string pairs. The old argument list will
956 still be supported for Emacs 24.x.
958 ** Miscellaneous name changes
959 Some Lisp symbols have been renamed to correct their spelling,
960 or to be more consistent with standard Emacs terminology.
962 *** Renamed functions
963 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
964 **** inactivate-input-method -> deactivate-input-method
965 **** quail-inactivate -> quail-deactivate
966 **** robin-inactivate -> robin-deactivate
967 **** viper-inactivate-input-method -> viper-deactivate-input-method
968 **** viper-inactivate-input-method-action ->
969 viper-deactivate-input-method-action
970 **** ucs-input-inactivate -> ucs-input-deactivate
973 The old hooks are still supported for backward compatibility, but they
974 are deprecated and will be removed eventually.
975 **** input-method-inactivate-hook -> input-method-deactivate-hook
976 **** robin-inactivate-hook -> robin-deactivate-hook
977 **** quail-inactivate-hook -> quail-deactivate-hook
979 *** Renamed variables
980 **** follow-deactive-menu -> follow-inactive-menu
981 **** inactivate-current-input-method-function ->
982 deactivate-current-input-method-function
984 ** Some obsolete functions, variables, and faces have been removed:
985 *** `last-input-char', `last-command-char', `unread-command-char'
986 *** `facemenu-unlisted-faces'
987 *** `rmail-decode-mime-charset'
988 *** `iswitchb-read-buffer'
989 *** `sc-version', `sc-submit-bug-report'
990 *** `set-char-table-default'
991 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
992 *** `compile-internal'
994 *** `mode-line-inverse-video'
995 *** `follow-mode-off-hook'
996 *** `cvs-commit-buffer-require-final-newline'
997 (use `log-edit-require-final-newline' instead)
998 *** `cvs-changelog-full-paragraphs'
999 (use `log-edit-changelog-full-paragraphs' instead)
1000 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1001 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1002 *** `vc-master-templates' (use `vc-handled-backends' instead)
1003 *** `vc-checkout-carefully'
1006 * Lisp Changes in Emacs 24.3
1008 ** CL-style generalized variables are now in core Elisp.
1009 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1010 You can define your own generalized variables using `gv-define-simple-setter',
1011 `gv-define-setter', etc.
1013 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1014 This can significantly speed up execution of non-byte-compiled code,
1015 but can also bump into previously unnoticed cyclic dependencies.
1016 These are generally harmless: they will simply cause the macro calls
1017 to be left for later expansion (as before), but will result in a
1018 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1019 You may wish to restructure your code so this does not happen.
1021 ** New sampling-based Elisp profiler.
1022 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1023 When finished, use M-x profiler-stop. The sampling rate can be based on
1024 CPU time or memory allocations.
1026 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1027 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1029 ** New macros `setq-local' and `defvar-local'.
1031 ** Face underlining can now use a wave.
1033 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1034 of `read-regexp' accepts a string ending with a colon and space, and its
1035 second argument DEFAULTS can be a list of strings accessible via `M-n'
1036 in the minibuffer ahead of other hard-coded useful regexp-related values.
1037 More commands use `read-regexp' now to read their regexp arguments.
1041 *** New function `completion-table-with-quoting' to handle completion
1042 in the presence of quoting, such as file completion in shell buffers.
1044 *** New function `completion-table-subvert' to use an existing completion
1045 table, but with a different prefix.
1049 *** New error type and new function `user-error'.
1050 These do not trigger the debugger.
1052 *** New option `debugger-bury-or-kill', saying what to do with the
1053 debugger buffer when exiting debug.
1055 *** Set `debug-on-message' to enter the debugger when a certain
1056 message is displayed in the echo area. This can be useful when trying
1057 to work out which code is doing something.
1059 *** New var `inhibit-debugger', automatically set to prevent accidental
1060 recursive invocations.
1064 *** New command `fit-frame-to-buffer' adjusts the frame height to
1067 *** The command `fit-window-to-buffer' can adjust the frame height
1068 if the new option `fit-frame-to-buffer' is non-nil.
1070 *** New macro `with-temp-buffer-window', similar to
1071 `with-output-to-temp-buffer'.
1073 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1076 *** New option `switch-to-buffer-preserve-window-point' to restore a
1077 window's point when switching buffers.
1079 *** New display action alist entries `window-height' and `window-width'
1080 specify the size of new windows created by `display-buffer'.
1082 *** New display action alist entry `pop-up-frame-parameters', if
1083 non-nil, specifies frame parameters to give any newly-created frame.
1085 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1086 tells display action functions to avoid changing which frame is
1089 *** New display action alist entry `previous-window', if non-nil,
1090 specifies window to reuse in `display-buffer-in-previous-window'.
1092 *** New display action functions `display-buffer-below-selected',
1093 and `display-buffer-in-previous-window'.
1095 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1096 now accept a third argument to avoid choosing the selected window.
1098 *** Additional values recognized for option `window-combination-limit'.
1100 *** The following variables are obsolete, as they can be replaced by
1101 appropriate entries in the `display-buffer-alist' function introduced
1103 **** `dired-shrink-to-fit'
1104 **** `display-buffer-reuse-frames'
1105 **** `display-buffer-function'
1106 **** `special-display-buffer-names'
1107 **** `special-display-frame-alist'
1108 **** `special-display-function'
1109 **** `special-display-regexps'
1113 *** `current-time-string' no longer requires that its argument's year
1114 must be in the range 1000..9999. It now works with any year supported
1115 by the underlying C implementation.
1117 *** `current-time' now returns extended-format time stamps
1118 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1119 PSEC is typically a multiple of 1000 on current machines. Other
1120 functions that use this format, such as `file-attributes' and
1121 `format-time-string', have been changed accordingly. Old-format time
1122 stamps are still accepted.
1124 *** The format of timers in `timer-list' and `timer-idle-list' is now
1125 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1126 The PSECS slot is new, and uses picosecond resolution. It can be
1127 accessed via the new `timer--psecs' accessor.
1129 *** Last-modified time stamps in undo lists now are of the form
1130 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1132 ** Floating point functions now always return special values like NaN,
1133 instead of signaling errors, if given invalid args; e.g., (log -1.0).
1134 Previously, they returned NaNs on some platforms but signaled errors
1135 on others. The affected functions are acos, asin, tan, exp, expt,
1136 log, log10, sqrt, and mod.
1138 ** New fringe bitmap `exclamation-mark'.
1140 ** Miscellaneous changes to special forms and macros
1142 *** `defun' and `defmacro' are now macros rather than special forms.
1144 *** `kbd' is now a function rather than a macro.
1146 ** Miscellaneous new functions
1148 *** `set-temporary-overlay-map' sets up a temporary keymap that
1149 takes precedence over most other maps for a short while (normally one key).
1151 *** `autoloadp' tests if its argument is an autoloaded object.
1153 *** `autoload-do-load' performs the autoloading operation.
1155 *** `buffer-narrowed-p' tests if the buffer is narrowed.
1157 *** `file-name-base' returns a file name sans directory and extension.
1159 *** `function-get' fetches a function property, following aliases.
1161 *** `posnp' tests if an object is a `posn'.
1163 *** `system-users' returns the user names on the system.
1165 *** `system-groups' returns the group names on the system.
1167 *** `tty-top-frame' returns the topmost frame of a text terminal.
1169 ** The following functions and variables are obsolete:
1170 *** `automount-dir-prefix' (use `directory-abbrev-alist')
1171 *** `buffer-has-markers-at'
1172 *** `macro-declaration-function' (use `macro-declarations-alist')
1173 *** `window-system-version' (provides no useful information)
1174 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
1175 *** `query-replace-interactive'
1176 *** `font-list-limit' (has had no effect since Emacs < 23)
1179 * Changes in Emacs 24.3 on Non-Free Operating Systems
1181 ** Cygwin builds can use the native MS Windows user interface.
1182 Pass `--with-w32' to configure. The default remains the X11 interface.
1184 ** Two new functions are available in Cygwin builds:
1185 `cygwin-convert-file-name-from-windows' and
1186 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
1187 code to access the Cygwin file-name mapping machinery to convert
1188 between Cygwin and Windows-native file and directory names.
1190 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
1191 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
1192 `mouse-autoselect-window'.
1194 ** On MS Windows Vista and later Emacs now supports symbolic links.
1196 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
1197 support for libxml2, even if its presence is detected.
1199 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1201 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
1202 directories to the search path. You must add them yourself if you want them.
1205 * Changes in Emacs 24.2
1207 ** This is mainly a bug-fix release.
1210 * Installation Changes in Emacs 24.1
1212 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1213 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1214 also depend on Gtk+. You can disable them with --without-rsvg and
1217 ** Emacs can be compiled with GnuTLS support.
1218 This happens by default if a suitably recent version of the library is
1219 found at build time. To prevent this, use the configure option
1220 `--without-gnutls'. See below for GnuTLS features.
1222 ** Emacs can be compiled with SELinux support.
1223 This happens by default if a suitably recent version of the library is
1224 found at build time. To prevent this, use the configure option
1225 `--without-selinux'. See below for SELinux features.
1227 ** Emacs can be compiled with ImageMagick support.
1228 This happens by default if a suitably recent version of the library is
1229 found at build time. To prevent this, use the configure option
1230 `--without-imagemagick'. See below for ImageMagick features.
1231 This feature is not available for the Nextstep or MS ports.
1233 ** Emacs can be compiled with libxml2 support.
1234 This happens by default if a suitably recent version of the library is
1235 found at build time. To prevent this, use the configure option
1236 `--without-xml2'. See below for libxml2 features.
1238 ** By default, the installed Info and man pages are compressed.
1239 You can disable this by configuring --without-compress-info.
1241 ** New configure option --with-wide-int.
1242 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
1243 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1246 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
1247 These provide no new functionality, they just remove the need to edit
1248 lib-src/Makefile by hand in order to use the associated features.
1250 ** New configure option --enable-use-lisp-union-type.
1251 This is only useful for Emacs developers to debug certain types of bugs.
1252 This is not a new feature; only the configure flag is new.
1254 ** The standalone programs digest-doc and sorted-doc are removed.
1255 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1257 ** The standalone program `fakemail' is removed.
1258 If you need it, feedmail.el provides a superset of the functionality.
1261 * Startup Changes in Emacs 24.1
1263 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1264 command line arguments, and the EMACS_UNIBYTE environment variable, no
1265 longer have any effect. (They were declared obsolete in Emacs 23.)
1267 ** New command line option `--no-site-lisp' removes site-lisp directories
1268 from load-path. -Q now implies this. This option does not affect the
1269 EMACSLOADPATH environment variable (and hence has no effect for
1273 * Changes in Emacs 24.1
1277 *** Many packages now use the `completion-at-point' command,
1278 rather than implementing separate completion commands.
1280 *** `completion-at-point' now handles tags and semantic completion.
1282 *** Completion in a non-minibuffer now tries to detect the end of completion
1283 and pops down the *Completions* buffer accordingly.
1285 *** New option `completion-cycle-threshold' allows completion cycling.
1287 *** New option `completion-category-overrides' for overriding the
1288 default completion style in certain circumstances.
1290 *** New completion style `substring'.
1292 *** Completion of buffer names uses `substring' completion by default.
1294 *** The option `widget-complete-field' has been removed.
1298 *** The first time you try sending mail, Emacs asks for a mail method.
1299 This is implemented by a new default for `send-mail-function', which
1300 is `sendmail-query-once'. This offers to use the smtpmail package, or
1301 to use the old defaults relying on external mail facilities
1302 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
1303 `mailclient-send-it' on Windows).
1305 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
1306 transfers the report to your desktop's preferred mail client, if there
1307 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
1310 *** See Changes in Specialized Modes and Packages for SMTPmail changes
1311 and Mail mode changes
1313 ** Emacs server and client changes
1315 *** New option `server-port' specifies the port for TCP Emacs servers.
1317 *** New emacsclient argument -q/--quiet suppresses some status messages.
1319 *** New emacsclient argument --frame-parameters specifies the frame
1320 parameters of any newly-created graphical frame.
1322 *** If emacsclient shuts down due to Emacs signaling an error,
1323 its exit status is 1.
1325 *** New emacsclient argument --parent-id ID.
1326 This opens a client frame in parent X window ID, via XEmbed, similar
1327 to the --parent-id argument to Emacs.
1329 ** Internationalization changes
1331 *** Emacs now supports display and editing of bidirectional text.
1332 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1333 displayed in the correct visual order as expected by users of those
1334 scripts. The display reordering is a "full bidirectionality" class
1335 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1336 with no RTL text should look exactly the same as before.
1338 **** New buffer-local variable `bidi-display-reordering'.
1339 To disable display reordering in a buffer, change this to nil.
1341 **** New buffer-local variable `bidi-paragraph-direction'.
1342 If nil (the default), Emacs determines the base direction of each
1343 paragraph from its text, as specified by the UBA. Setting the value
1344 to `right-to-left' or `left-to-right' forces a base direction on each
1347 Paragraphs with right-to-left base direction are displayed starting at
1348 the right window edge.
1350 *** Enhanced support for characters with no glyphs in available fonts,
1351 or, on text terminals, characters that cannot be encoded by the
1352 terminal coding system. The new option `glyphless-char-display-control'
1353 specifies how to display them: as a hexadecimal code in a box, a thin
1354 1-pixel space, an empty box, etc.
1356 *** New input methods for Farsi and Bulgarian
1357 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
1359 *** `nobreak-char-display' now also highlights Unicode hyphen chars
1360 (U+2010 and U+2011).
1362 *** New Hebrew translation of the Emacs Tutorial.
1363 Type `C-u C-h t' to choose it in case your language setup doesn't
1364 automatically select it.
1366 ** An Emacs Lisp package manager is now included.
1367 This is a convenient way to download and install additional packages,
1368 from a package repository at http://elpa.gnu.org.
1370 *** M-x list-packages shows a list of packages, which can be
1371 selected for installation.
1373 *** New command `describe-package', bound to `C-h P'.
1375 *** By default, all installed packages are loaded automatically when
1376 Emacs starts up. To disable this, set `package-enable-at-startup' to
1377 nil. To specify the packages to load, customize `package-load-list'.
1379 ** Custom theme changes
1381 *** New command `M-x customize-themes', which provides a convenient
1382 interface for enabling and disabling Custom themes.
1384 *** New option `custom-theme-load-path' is the load path for themes.
1385 Emacs no longer looks for Custom themes in `load-path'. The default
1386 value of `custom-theme-load-path' says to look for themes in
1387 `custom-theme-directory', followed by a subdirectory of
1388 `data-directory' named "themes/", which contains a small selection of
1389 built-in Custom themes.
1391 *** New option `custom-safe-themes' records known-safe theme files.
1392 If a theme is not in this list, Emacs queries before loading it, and
1393 offers to save the theme to `custom-safe-themes' automatically. By
1394 default, all themes included in Emacs are treated as safe.
1396 ** Improved GTK integration
1398 *** GTK scroll-bars are now placed on the right by default.
1399 The function `set-scroll-bar-mode' can change this.
1401 *** GTK tool bars can have just text, just images or images and text.
1402 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
1403 the default is taken from desktop settings.
1405 *** GTK tool bars can be placed on any edge of the frame.
1406 The frame-parameter tool-bar-position controls this. It takes the
1407 values top, left, right or bottom. The Options => Show/Hide menu has
1410 *** The default colors for selected text (the `region' face) are taken
1411 from the GTK theme when Emacs is built with GTK.
1413 *** Emacs uses GTK tooltips by default if built with GTK.
1414 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
1416 ** Graphical interface changes
1418 *** On graphical displays, the mode-line no longer ends in dashes.
1419 Also, the first dash (which does not indicate anything) is just
1420 displayed as a space.
1422 *** `menu-bar-select-buffer-function' lets you choose another operation
1423 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
1425 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
1426 built with Xft. These fonts can be set via X resources, for example:
1427 Emacs.pane.menubar.font: Courier-12
1431 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
1432 or if it receives a SIGINT signal in batch mode.
1434 *** `kill-emacs-hook' is now also run in batch mode.
1435 Third-party code which adds to `kill-emacs-hook' should check if they
1436 do the right thing in batch mode.
1438 ** Scrolling changes
1440 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
1441 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
1442 of buffer at first key-press (instead they move to top/bottom of buffer)
1443 when `scroll-error-top-bottom' is non-nil.
1445 *** New option `scroll-error-top-bottom' (see above).
1447 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
1448 scroll a line instead of full screen.
1450 *** New property `scroll-command' should be set on a command's symbol to
1451 define it as a scroll command affected by `scroll-preserve-screen-position'.
1453 *** If you customize `scroll-conservatively' to a value greater than 100,
1454 Emacs will never recenter point in the window when it scrolls due to
1455 cursor motion commands or commands that move point (e.f., `M-g M-g').
1456 Previously, you needed to use `most-positive-fixnum' as the value of
1457 `scroll-conservatively' to achieve the same effect.
1459 *** "Aggressive" scrolling now honors the scroll margins.
1460 If you customize `scroll-up-aggressively' or
1461 `scroll-down-aggressively' and move point off the window, Emacs now
1462 scrolls the window so as to avoid positioning point inside the scroll
1465 ** Basic SELinux support has been added.
1466 This requires Emacs to be linked with libselinux at build time.
1468 *** Emacs preserves the SELinux file context when backing up.
1469 Also, the function `copy-file' has an extra optional argument for
1470 preserving SELinux context, and the return value of `backup-buffer'
1471 now includes the SELinux context.
1473 *** New functions `file-selinux-context' and `set-file-selinux-context'
1474 get and set the SELinux context of a file.
1478 *** `delete-by-moving-to-trash' now only affects commands that specify
1479 trashing. This avoids inadvertently trashing temporary files.
1481 *** Calling `delete-file' or `delete-directory' with a prefix argument
1482 now forces true deletion, regardless of `delete-by-moving-to-trash'.
1484 ** File- and directory-local variable changes
1486 *** You can stop directory local vars from applying to subdirectories.
1487 Add an element (subdirs . nil) to the alist portion of any variables
1488 settings to indicate that the section should not apply to
1491 *** Directory local variables can apply to some file-less buffers.
1492 Affected modes include dired, vc-dir, and log-edit. For example,
1493 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
1494 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
1495 `hack-dir-local-variables-non-file-buffer' to support this.
1497 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
1498 Instead, use "eval: (minor-mode 1)".
1500 *** The variable `inhibit-first-line-modes-regexps' has been renamed
1501 to `inhibit-local-variables-regexps'. As the name suggests, it now
1502 applies to ALL file local variables, not just -*- lines. The
1503 associated `inhibit-first-line-modes-suffixes' has been renamed in the
1508 *** The `quit-window' command now restores the last buffer displayed
1509 in the quitted window.
1511 *** Resizing an Emacs frame now preserves proportional window sizes,
1512 modulo restrictions like window minimum sizes and fixed-size windows.
1514 *** The behavior of `display-buffer' is now customizable in detail.
1516 **** New option `display-buffer-base-action' specifies a list of
1517 user-determined display "actions" (functions and optional arguments
1518 for choosing the displaying window).
1520 This takes precedence over the default display action, which is
1521 specified by `display-buffer-fallback-action'.
1523 **** New option `display-buffer-alist' maps buffer name regexps to
1524 display actions, taking precedence over `display-buffer-base-action'.
1526 *** New option `window-combination-limit'.
1527 The new option `window-combination-limit' allows to return the space
1528 obtained for resizing or creating a window more reliably to the window
1529 from which such space was obtained.
1531 *** New option `window-combination-resize'.
1532 The new option `window-combination-resize' allows to split a window that
1533 otherwise cannot be split because it's too small by stealing space from
1534 other windows in the same combination. Subsequent resizing or deletion
1535 of the window will resize all windows in the same combination as well.
1537 *** New option `frame-auto-hide-function' lets you choose between
1538 iconifying or deleting a frame when burying a buffer in a dedicated
1539 frame, or quitting a window showing a buffer in a frame of its own.
1541 *** New commands `maximize-window' and `minimize-window'.
1542 These maximize and minimize the size of a window within its frame.
1544 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
1545 These functions allow to navigate through the live buffers that have
1546 been shown in a specific window.
1548 ** Minibuffer changes
1550 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
1551 This is handy for minibuffer-only frames, and is also used for the feature
1552 where mouse-1 pops up *Messages*"', which can now easily be changed.
1554 *** Minibuffers set `truncate-lines' to nil.
1555 If you want to change the value to something else, you could use
1556 for example `minibuffer-setup-hook'.
1558 ** `auto-mode-case-fold' is now enabled by default.
1560 ** `backup-by-copying-when-mismatch' now defaults to t.
1562 ** New basic faces `error', `warning', `success'.
1563 These are used to highlight text indicating failure, caution or
1564 successful operation.
1566 ** New option `list-colors-sort' defines the color sort order
1567 for `list-colors-display'.
1569 ** The variable `focus-follows-mouse' now always defaults to nil.
1572 * Editing Changes in Emacs 24.1
1576 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
1577 `isearch-yank-line'.
1579 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
1580 `isearch-yank-kill'.
1582 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
1584 ** New commands `count-words-region' and `count-words'.
1586 *** M-= is bound to `count-words-region', not `count-lines-region'.
1587 The `count-words-region' command, when called interactively, reports
1588 the number of lines, words, and characters in the region. It is a
1589 superset of the old `count-lines-region', which is now an obsolete
1592 ** The command `just-one-space' (M-SPC), if given a negative argument,
1593 also deletes newlines around point.
1597 *** New option `delete-active-region'.
1598 If non-nil, [delete] and DEL delete the region if it is active and no
1599 prefix argument is given. If set to `kill', those commands kill
1602 *** New command `delete-forward-char', bound to [delete].
1603 This is meant for interactive use, and obeys `delete-active-region'.
1604 The command `delete-char' does not obey `delete-active-region'.
1606 *** `delete-backward-char' is now a Lisp function.
1607 Apart from obeying `delete-active-region', its behavior is unchanged.
1608 However, the byte compiler now warns if it is called from Lisp; Lisp
1609 callers should use delete-char with a negative argument instead.
1611 *** The option `mouse-region-delete-keys' has been deleted.
1613 ** Selection changes.
1615 The default handling of clipboard and primary selections has been
1616 changed to conform with modern X applications. In short, most
1617 commands for killing and yanking text now use the clipboard, while
1618 mouse commands use the primary selection.
1620 In the following, we provide a list of these changes, followed by a
1621 list of steps to get the old behavior back if you prefer that.
1623 *** `select-active-regions' now defaults to t.
1624 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
1625 the kill ring. The selected text is put in the primary selection, if
1626 the system possesses a separate primary selection facility (e.g. X).
1628 **** `select-active-regions' also accepts a new value, `only'.
1629 This means to only set the primary selection for temporarily active
1630 regions (usually made by mouse-dragging or shift-selection);
1631 "ordinary" active regions, such as those made with C-SPC followed by
1632 point motion, do not alter the primary selection.
1634 **** `mouse-drag-copy-region' now defaults to nil.
1636 *** mouse-2 is now bound to `mouse-yank-primary'.
1637 This pastes from the primary selection, ignoring the kill-ring.
1638 Previously, mouse-2 was bound to `mouse-yank-at-click'.
1640 *** `x-select-enable-clipboard' now defaults to t on all platforms.
1642 *** `x-select-enable-primary' now defaults to nil.
1643 Thus, commands that kill text or copy it to the kill-ring (such as
1644 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
1646 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
1647 exactly equivalent to M-w, C-w, and C-y respectively.
1649 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
1650 non-nil by default, as Windows does not support the primary selection
1651 between applications.
1653 *** To return to the previous behavior, do the following:
1655 **** Change `select-active-regions' to nil.
1656 **** Change `mouse-drag-copy-region' to t.
1657 **** Change `x-select-enable-primary' to t (on X only).
1658 **** Change `x-select-enable-clipboard' to nil.
1659 **** Bind `mouse-yank-at-click' to mouse-2.
1661 *** Support for X cut buffers has been removed.
1663 *** X clipboard managers are now supported.
1664 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
1666 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
1667 in the current rectangle. With a prefix argument, this prompts for a
1668 number to count from and for a format string.
1670 ** `redisplay-dont-pause' now defaults to t.
1671 This makes Emacs feel more responsive to editing commands that arrive
1672 at high rate, e.g. if you lean on some key, because stopping redisplay
1673 in the middle (when this variable is nil) forces more expensive
1674 updates later on, and Emacs appears to be unable to keep up.
1676 ** The behavior of <TAB> for active regions in Text mode has changed.
1677 In Text and related modes, typing <TAB> (`indent-for-tab-command')
1678 when the region is active causes Emacs to indent all the lines in the
1679 region, aligning them with the line previous to the first line in the
1680 region (or with the left margin if there is no previous line).
1682 ** When `occur' is called with a prefix argument, matching strings are
1683 collected into the `*Occur*' buffer without line numbers. If there
1684 are parenthesized subexpressions in the specified regexp, `occur'
1685 reads replacement text that may contain \\& and \\N whose convention
1686 follows `replace-match'.
1689 * Changes in Specialized Modes and Packages in Emacs 24.1
1691 ** Archive Mode has basic support for browsing and updating 7z archives.
1695 *** BibTeX mode now supports biblatex.
1696 Use the variable `bibtex-dialect' to select different BibTeX dialects.
1697 `bibtex-entry-field-alist' is now an obsolete alias for
1698 `bibtex-BibTeX-entry-alist'.
1700 *** New command `bibtex-search-entries', bound to C-c C-a.
1702 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
1704 *** New variable `bibtex-search-entry-globally'.
1708 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
1710 *** The default browser used by the package is now the "xdg-open" program,
1711 on platforms that support it. This calls your desktop's preferred browser.
1715 *** Support for musical notes.
1717 *** Support for logarithmic units.
1719 *** No longer uses the tex prefix for TeX specific unit names when
1720 using TeX or LaTeX mode.
1722 *** New option to highlight selections using faces.
1724 *** `calc-histogram' has the option of using a vector to determine the bins.
1726 *** New "O" option prefix.
1728 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
1730 ** Calendar, Diary, and Appt
1732 *** Diary entries can contain non-printing "comments".
1733 See the variable `diary-comment-start'.
1735 *** Appointments can specify their individual warning times.
1736 See the variable `appt-warning-time-regexp'.
1738 *** The function specified by `appt-disp-window-function' may be passed
1739 lists of arguments if multiple appointments are due at similar times.
1740 If you are using a custom function for this, you should update it.
1742 *** New function `diary-hebrew-birthday'.
1744 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
1745 may no longer be nil, but must all be strings.
1747 *** The obsolete (since Emacs 22.1) method of enabling the appt
1748 package by adding `appt-make-list' to `diary-hook' has been removed.
1749 Use `appt-activate' instead.
1751 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
1752 appt-issue-message (use the function appt-activate)
1753 appt-visible/appt-msg-window (use the variable appt-display-format)
1755 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
1756 view-diary-entries, list-diary-entries, show-all-diary-entries
1760 *** New feature to "guess" the style in an existing buffer.
1761 The main entry point is M-x c-guess.
1763 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
1765 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
1766 Thus C-M-a will, by default, go to the beginning of the immediate function,
1769 *** "Macros with semicolons" can be registered for correct indentation.
1770 Where such a macro ends a line (no semicolon) the next statement is no longer
1771 parsed as a statement continuation.
1773 ** Comint and modes derived from it use the standard completion code.
1777 *** Compilation mode can be used without Font Lock mode.
1778 `compilation-parse-errors-function' is now obsolete.
1780 *** New variable `compilation-filter-start', which is bound while
1781 `compilation-filter-hook' runs. It records the start position of the
1782 text inserted by `compilation-filter'.
1784 *** `compilation-error-screen-columns' and `compilation-first-column'
1785 are obeyed in the editing buffer. So programming language modes can
1786 set them, whereas previously only the value in the *Compilation*
1791 *** Customize buffers now contain a search field.
1792 The search is performed using `customize-apropos'.
1793 To turn off the search field, set `custom-search-field' to nil.
1795 *** Options in customize group buffers start out hidden if not customized.
1796 Use the arrow to the left of the option name to toggle visibility.
1798 *** custom-buffer-sort-alphabetically now defaults to t.
1800 *** The color widget now has a "Choose" button, which allows you to
1801 choose a color via `list-colors-display'.
1805 *** It is now possible to access buses other than the default system
1808 *** The `dbus-register-method' and `dbus-register-property' functions
1809 optionally do not register names.
1811 *** The new function `dbus-register-service' registers a known service
1812 name on a D-Bus without also registering a property or a method.
1816 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
1817 if called with a prefix argument, read a file name from the minibuffer
1818 instead of using the current buffer.
1820 *** The "dired local variables" feature of Dired-x is obsolete.
1821 The standard directory local variables feature replaces it.
1825 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
1826 controlling attempts to autojoin a channel.
1828 *** New variable `erc-coding-system-precedence': If we use `undecided'
1829 as the server coding system, this variable will then be consulted.
1830 The default is to decode strings that can be decoded as utf-8 as
1831 utf-8, and do the normal `undecided' decoding for the rest.
1835 *** The default value of `eshell-directory-name' has changed
1836 to be an "eshell" directory in `user-emacs-directory'.
1837 The old "~/.eshell/" directory is still used if it exists, though.
1841 *** The M-x gdb command now uses the GDB Machine Interface protocol.
1842 It now supports multithread non-stop debugging and simultaneous
1843 debugging of several threads.
1847 *** RET (`image-toggle-animation') toggles animation, if applicable.
1848 Animation plays once, unless the option `image-animate-loop' is non-nil.
1852 *** New command M-x info-display-manual displays a named Info manual.
1853 If that manual is already visited in some Info buffer, it displays
1854 that buffer. (This is handy if you have many manuals in many *info*
1855 buffers, and don't remember the name of the buffer visiting the manual
1856 you want to consult.) Otherwise, it loads and displays the manual.
1858 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
1859 This is for compatibility with the stand-alone Info reader program,
1860 and also because `Info-edit' is a rarely used command that is disabled
1863 ** Mail mode changes (not Message mode)
1865 *** New command M-x mail-add-attachment for adding MIME attachments
1867 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
1868 (Its name is misleading, since it has nothing to do with MIME
1869 attachments.) The old name is now an obsolete alias to the new name.
1871 ** MH-E has been updated to MH-E version 8.3.1.
1872 See MH-E-NEWS for details.
1874 ** Modula-2 mode provides auto-indentation.
1876 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
1878 ** nXML mode no longer binds C-RET to `nxml-complete'.
1879 Completion is now performed via `completion-at-point', bound to C-M-i
1880 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
1881 default), this performs tag completion.
1883 ** Org mode has been updated to version 7.8.09.
1884 See ORG-NEWS for details.
1886 ** Prolog mode has been completely revamped, with lots of additional
1887 functionality such as more intelligent indentation, electricity,
1888 support for more variants, including Mercury, and a lot more.
1892 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
1893 in the Rmail incoming message.
1895 *** The variable `rmail-message-filter' no longer has any effect.
1896 This change was made in Emacs 23.1 but was not advertised at the time.
1897 Try using `rmail-show-message-hook' instead.
1901 *** M-x shell prompts for the shell path name if the default directory
1902 is a remote file name and neither the environment variable $ESHELL nor
1903 the variable `explicit-shell-file-name' is set.
1905 *** TAB is now bound to the standard `completion-at-point' command,
1906 which now implements the pcomplete rules for shell command completion.
1910 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
1911 if the mail server supports them. This uses either built-in GnuTLS
1912 support, or the starttls.el library. Customize `smtpmail-stream-type'
1915 *** The variable `smtpmail-auth-credentials' has been removed.
1916 By default, the information is now stored in the file ~/.authinfo.
1917 This was the default value of smtpmail-auth-credentials. If you had
1918 customized smtpmail-auth-credentials to a list of user names and
1919 passwords, those settings are not used. During your first connection
1920 to the smtp server, Emacs will prompt for the user name and password,
1921 and offer to save them to ~/.authinfo. Or you can manually copy the
1922 credentials to ~/.authinfo. For example, if you had
1924 (setq smtpmail-auth-credentials
1925 '(("mail.example.org" 25 "jim" "s!cret")))
1927 then the equivalent line in ~/.authinfo would be
1929 machine mail.example.org port 25 login jim password s!cret
1931 See the auth-source manual for more information, e.g. on encrypting
1932 the credentials file.
1934 *** The variable `smtpmail-starttls-credentials' has been removed.
1935 If you had that set, you need to put
1937 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
1939 in your ~/.authinfo file instead.
1941 *** SMTPmail defaults to using the address in the From: header as the
1942 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
1943 to the address you wish to use instead.
1947 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
1948 and `sql-oracle-scan-on'.
1950 *** New options controlling prompting for login parameters.
1951 Each supported product has a custom variable `sql-*-login-params',
1952 which is a list of the parameters to be prompted for before a
1953 connection is established.
1955 *** The command `sql-product-interactive' now takes a prefix argument,
1956 which causes it to prompt for an SQL product.
1958 *** Product-specific SQL interactive commands now take prefix arguments.
1959 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
1960 given a prefix argument, prompt for a name for the SQL interactive
1961 buffer. This reduces the need for calling `sql-rename-buffer'.
1963 *** SQL interactive modes suppress command continuation prompts, and
1964 replace tabs with spaces. The first change impacts multiple line SQL
1965 statements entered with C-j between each line, statements yanked into
1966 the buffer and statements sent with `sql-send-*' functions. The
1967 second prevents the MySQL and Postgres interpreters from listing
1968 object name completions when sent text via `sql-send-*' functions.
1970 *** New command `sql-connect' starts a predefined SQLi session,
1971 using the login parameters from `sql-connection-alist'.
1973 *** New "Save Connection" menu item in SQLi buffers.
1974 This gathers the login params specified for the SQLi session, if it
1975 was not started by a connection, and saves them as a new connection.
1977 *** New commands for listing database objects and details:
1978 sql-list-all and sql-list-table.
1980 *** An API for manipulating SQL product definitions has been added.
1984 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
1988 *** New inline access method "ksu" (kerberized su).
1990 *** The following access methods are discontinued: "ssh1_old",
1991 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
1993 *** The user option `remote-file-name-inhibit-cache' controls whether
1994 remote file attributes are cached for better performance.
1996 *** The option `ange-ftp-binary-file-name-regexp' has changed its
1997 default value to "".
1999 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2000 for remote machines which support SELinux.
2002 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2003 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2004 the degree of parallelism.
2006 ** VC and related modes
2008 *** Support for pulling on distributed version control systems.
2009 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2010 supported (currently with Bzr, Git, and Mercurial), to update the
2011 current branch and working tree. A prefix argument means to prompt
2012 the user for specifics, e.g. a pull location.
2014 *** `vc-update' is now an alias for `vc-pull'.
2016 *** Support for merging on distributed version control systems.
2017 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2018 is supported (currently with Bzr, Git, and Mercurial), to merge
2019 changes from another branch into the current one. It prompts for
2020 specifics, e.g. a merge source.
2022 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2023 shows a diff while querying the user. It defaults to t.
2025 *** Log entries in some Log View buffers can be toggled to display a
2026 longer description by typing RET (log-view-toggle-entry-display).
2027 This is currently supported for Bzr, Git, and Mercurial (to support
2028 another backend, define a `log-view-expanded-log-entry-function').
2029 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2030 use this to display the full log entry for the revision at point.
2032 *** New command `vc-ediff' allows visual comparison of two revisions
2033 of a file similar to `vc-diff', but using ediff backend.
2035 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2036 this was not advertised at the time.
2038 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2039 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2040 this was not advertised at the time.
2046 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2048 *** partial-completion-mode (complete.el) is obsolete.
2049 You can get a comparable behavior with:
2050 (setq completion-styles '(partial-completion initials))
2051 (setq completion-pcm-complete-word-inserts-delimiters t)
2053 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2055 *** pgg is obsolete (use EasyPG instead).
2057 *** sregex.el is obsolete, since rx.el is a strict superset.
2059 *** s-region.el and pc-select.el are obsolete.
2060 They are superseded by shift-select-mode, enabled by default since 23.1.
2062 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2066 *** The Landmark game is now invoked with `landmark', not `lm'.
2067 Its functions and variables have been similarly renamed.
2069 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2070 (This interfered with cua-mode.)
2072 *** f90.el has some support for Fortran 2008 syntax.
2074 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2076 *** New command `nato-region' converts text to NATO phonetic alphabet.
2079 * New Modes and Packages in Emacs 24.1
2081 ** Occur Edit mode applies edits made in *Occur* buffers to the
2082 original buffers. It is bound to "e" in Occur mode.
2084 ** New global minor mode electric-pair-mode.
2085 When enabled, typing an open parenthesis automatically inserts the
2086 matching closing one.
2088 ** New global minor mode electric-indent-mode.
2089 When enabled, typing certain characters triggers reindentation.
2090 Major modes wishing to use this can set electric-indent-chars or
2091 electric-indent-functions.
2093 ** New global minor mode electric-layout-mode.
2094 When enabled, typing certain characters automatically inserts newlines.
2095 Major modes wishing to use this can set electric-layout-rules.
2097 ** tabulated-list.el provides a generic major mode for tabulated data,
2098 from which other modes can be derived.
2100 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2102 ** secrets.el is an implementation of the Secret Service API, an
2103 interface to password managers like GNOME Keyring or KDE Wallet. The
2104 Secret Service API requires D-Bus for communication. The command
2105 `secrets-show-secrets' offers a buffer with a visualization of the
2108 ** notifications.el provides an implementation of the Desktop
2109 Notifications API. It requires D-Bus for communication.
2111 ** soap-client.el supports access to SOAP web services from Emacs.
2112 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2114 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
2116 ** New emacs-lock.el package.
2117 The previous version has been moved to obsolete/old-emacs-lock.el.
2118 Now, there is a proper minor mode `emacs-lock-mode'. Protection
2119 against exiting Emacs and killing the buffer can be set separately.
2120 The mechanism for automatically turning off protection for buffers
2121 with dead inferior processes has been generalized.
2124 * Incompatible Lisp Changes in Emacs 24.1
2126 ** Passing a nil argument to a minor mode function call now ENABLES
2127 the minor mode unconditionally. This is so that you can write e.g.
2129 (add-hook 'text-mode-hook 'foo-mode)
2131 to enable foo-mode in Text mode buffers, removing the need for
2132 `turn-on-foo-mode' style functions. This affects all mode commands
2133 defined by `define-minor-mode'. If called interactively, the mode
2134 command still toggles the minor mode.
2136 ** The return value of `backup-buffer' has changed.
2137 It is now a list of three elements, where the second element is a list
2138 describing the original file's SELinux context. If Emacs or the
2139 system lacks SELinux support, the context list is (nil nil nil nil).
2140 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
2142 ** `char-direction-table' and the `char-direction' function were deleted.
2143 They were buggy and inferior to the new support of bidirectional
2144 editing introduced in Emacs 24. If you need the bidirectional
2145 properties of a character, use `get-char-code-property' with the last
2146 argument `bidi-class'.
2148 ** `copy-directory' now copies the source directory as a subdirectory
2149 of the target directory, if the latter is an existing directory. The
2150 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2151 the contents directly into a pre-existing target directory.
2153 ** For mouse click input events in the text area, the Y pixel
2154 coordinate in the POSITION list now counts from the top of the text
2155 area, excluding any header line. Previously, it counted from the top
2158 ** Support for "old-style" backquotes, obsolete for 10+ years, has
2159 been further reduced. Now a backquote not followed by a space is
2160 always treated as a "new-style" backquote. Please remove all
2161 "old-style" backquotes from your code. If your code uses backquotes
2162 as documented in the Elisp manual, and compiles without warning, then
2163 you have nothing to do in this regard. Code not following the
2164 appropriate conventions may fail to compile.
2166 The most common cause of trouble seems to be an old-style backquote
2167 followed by a newline. Another cause of trouble is vector notation
2168 for key sequence notation: instead of [(control ,)] and [(control ')],
2169 you should write [(control ?,)] and [(control ?')], which will work in
2172 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2173 was not advertised at the time. The function `custom-initialize-delay'
2174 replaced all known uses.
2176 ** `view-buffer' now treats special mode-class in the same way that
2177 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2178 major mode is special).
2180 ** Menu and tool bar changes
2182 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
2183 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2184 With these alist entries omitted, `make-frame' checks the value of the
2185 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2186 a menu-bar or tool-bar, respectively. If the alist entries are added,
2187 they override the value of `menu-bar-mode'/`tool-bar-mode'.
2189 *** The menu bar bindings's caches are not used any more.
2190 Use (where-is-internal <def> nil t) instead.
2192 ** Regions created by mouse dragging are now normal active regions,
2193 similar to those created by shift-selection (see Selection changes
2194 above). In previous Emacs versions, these regions were delineated by
2195 `mouse-drag-overlay'; that variable has been removed.
2197 ** The fourth argument of `filter-buffer-substring' has been removed.
2198 If you want to remove text properties from the final result, simply
2199 pass the result through substring-no-properties.
2201 ** cl.el no longer provides `cl-19'.
2203 ** The following obsolete functions and aliases have been removed
2204 (the appropriate new function is given in parentheses; "not needed"
2205 means you can just remove all calls to the function in question):
2207 *** `comint-kill-output' (`comint-delete-output')
2208 *** `decompose-composite-char' (`char-to-string')
2209 *** `outline-visible' (`outline-invisible-p')
2210 *** `internal-find-face' (`facep')
2211 *** `internal-get-face' (`facep and check-face')
2212 *** `frame-update-faces' (not needed)
2213 *** `frame-update-face-colors' (`frame-set-background-mode')
2214 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2215 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2216 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2217 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2218 *** `x-make-font-unbold' (`make-face-unbold')
2219 *** `x-make-font-unitalic' (`make-face-unitalic')
2220 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2221 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2222 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2223 *** `char-bytes' (== 1)
2224 *** `isearch-return-char' (`isearch-printing-char')
2225 *** `make-local-hook' (not needed)
2226 *** `set-screen-height' (`set-frame-height')
2227 *** `set-screen-width' (`set-frame-width')
2229 ** The following obsolete variables and varaliases have been removed
2230 (the appropriate new variable is given in parentheses):
2232 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2233 *** `vc-header-alist' (`vc-BACKEND-header')
2234 *** `directory-sep-char' (== ?/)
2235 *** `font-lock-defaults-alist' (`font-lock-defaults')
2236 *** `e' (`float-e').
2238 ** The following obsolete files were removed:
2239 sc.el, x-menu.el, rnews.el, rnewspost.el
2241 ** The format of the finder-inf.el file has changed, since the Finder
2242 mechanism is now based on the package system. The variable
2243 `finder-package-info' is replaced by `package--builtins' and
2244 `finder-keywords-hash'.
2246 ** When generating autoloads, `update-directory-autoloads' no longer
2247 assumes every inspected file is in your `load-path'. It instead
2248 generates relative names according to the current `load-path'.
2251 * Lisp Changes in Emacs 24.1
2253 ** Code can now use lexical scoping by default instead of dynamic scoping.
2254 The `lexical-binding' variable enables lexical scoping for local
2255 variables. It is typically set via a file-local variable in the first
2256 line of the file, in which case it applies to all the code in that
2259 *** `eval' takes a new optional argument `lexical' to choose the new lexical
2260 binding instead of the old dynamic binding mode.
2262 *** Lexically scoped interpreted functions are represented with a new form
2263 of function value which looks like (closure ENV ARGS &rest BODY).
2265 *** New macro `letrec' to define recursive local functions.
2267 *** `defvar' and `defconst' now mark the variable as special (dynamic).
2268 So do `defcustom' and other forms that call `defvar' as a subroutine.
2270 *** New function `special-variable-p' to check whether a variable is
2271 declared as dynamically bound.
2273 *** The form ((lambda ...) ...) is deprecated.
2275 ** An Emacs Lisp testing tool is now included.
2276 Emacs Lisp developers can use this tool to write automated tests for
2277 their code. See the ERT info manual for details.
2279 ** Changes for bidirectional display and editing
2281 *** New function `current-bidi-paragraph-direction'.
2282 This returns the base direction of the paragraph at point.
2284 *** New function `bidi-string-mark-left-to-right'.
2285 Given a string containing characters from right-to-left scripts, this
2286 function returns another string which can be safely inserted into a
2287 buffer, such that any following text will be always displayed to the
2288 right of that string. (This works by appending an invisible Unicode
2289 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
2291 This is useful when the buffer has overall left-to-right paragraph
2292 direction and you need to insert a string whose contents are not known
2293 in advance, without disrupting the layout of the line.
2297 *** Window tree functions are accessible in Elisp.
2298 Functions are provided to return the parent, siblings or child windows
2299 of any window including internal windows (windows not associated with a
2300 buffer) in the window tree.
2302 **** New function `window-valid-p' gives non-nil for live and internal
2305 **** Window manipulation can deal with internal windows.
2306 Many window handling functions like `split-window', `delete-window', or
2307 `delete-other-windows' as well as the window resizing functions can now
2308 act on any window including internal ones.
2310 *** window-total-height/-width vs window-body-height/-width.
2311 The function `window-height' has been renamed to `window-total-height'
2312 and `window-width' has been renamed to `window-body-width'. The old
2313 names are provided as aliases. Two new functions `window-total-width'
2314 and `window-body-height' are provided.
2316 *** Window parameters specific to window handling functions.
2317 For each window you can specify a parameter to override the default
2318 behavior of a number of functions like `split-window', `delete-window'
2319 and `delete-other-windows'. The variable `ignore-window-parameters'
2320 allows to ignore processing such parameters.
2322 *** New semantics of third argument of `split-window'.
2323 The third argument of `split-window' has been renamed to SIDE and can be
2324 set to any of the values 'below, 'right, 'above, or 'left to make the
2325 new window appear on the corresponding side of the window that shall be
2326 split. Any other value of SIDE will cause `split-window' to split the
2327 window into two side-by-side windows as before.
2329 *** Window resizing functions.
2330 A new standard function for resizing windows called `window-resize' has
2331 been introduced. This and all other functions for resizing windows no
2332 longer delete any windows when they become too small.
2334 *** Deleting the selected window now selects the most recently selected
2335 live window on that frame instead.
2337 *** `adjust-window-trailing-edge' adjustments.
2338 `adjust-window-trailing-edge' can now deal with fixed-size windows and
2339 is able to resize other windows if a window adjacent to the trailing
2340 edge cannot be shrunk any more. This makes its behavior more similar to
2341 that of Emacs 21 without compromising, however, its inability to delete
2342 windows which was introduced in Emacs 22.
2344 *** Window-local buffer lists.
2345 Windows now have local buffer lists. This means that removing a buffer
2346 from display in a window will preferably show the buffer previously
2347 shown in that window with its previous window-start and window-point
2348 positions. This also means that the same buffer may be automatically
2349 shown twice even if it already appears in another window.
2351 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2352 which if non-nil requires the buffer to be displayed in the currently
2353 selected window, signaling an error otherwise. If nil, another window
2354 can be used, e.g. if the selected one is strongly dedicated.
2356 *** `split-window-vertically' and `split-window-horizontally' renamed
2357 to `split-window-below' and `split-window-right' respectively.
2358 The old names are kept as aliases.
2362 **** The second arg to `display-buffer' and `pop-to-buffer' is now
2363 named ACTION, and takes a display action of the same form as
2364 `display-buffer-base-action' (see Changes, above). A non-nil,
2365 non-list value is treated specially, as the old meaning.
2367 **** New variable `display-buffer-overriding-action'.
2369 **** The procedure of `display-buffer' etc. to choose a window is
2370 determined by combining `display-buffer-overriding-action',
2371 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2372 and `display-buffer-fallback-action'. The second and fourth of these
2373 are user-customizable variables.
2375 See the docstring of `display-buffer' for details.
2377 *** New functions `window-state-get' and `window-state-put'.
2378 These functions allow to save and restore the state of an arbitrary
2379 frame or window as an Elisp object.
2383 *** New variable `completion-extra-properties' used to specify extra
2384 properties of the current completion:
2385 - :annotate-function, same as the old completion-annotate-function.
2386 - :exit-function, function to call after completion took place.
2388 *** Functions on `completion-at-point-functions' can return any of the
2389 properties valid for `completion-extra-properties'.
2391 *** `completion-annotate-function' is obsolete.
2393 *** New `metadata' method for completion tables. The metadata thus returned
2394 can specify various details of the data returned by `all-completions':
2395 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
2396 used to select a style in completion-category-overrides.
2397 - `annotation-function' to add annotations in *Completions*.
2398 - `display-sort-function' to specify how to sort entries in *Completions*.
2399 - `cycle-sort-function' to specify how to sort entries when cycling.
2401 *** `minibuffer-local-filename-must-match-map' is not used any more.
2402 Instead, the bindings in `minibuffer-local-filename-completion-map'
2403 are combined with `minibuffer-local-must-match-map'.
2405 *** New variable `completing-read-function' allows overriding the
2406 behavior of `completing-read'.
2408 ** `glyphless-char-display' can now distinguish between graphical and
2409 text terminal display, via a char-table entry that is a cons cell.
2411 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
2412 Instead, the offending function is removed.
2416 *** New function `run-hook-wrapped' for running an abnormal hook by
2417 passing the hook functions as arguments to a "wrapping" function.
2418 Like `run-hook-with-args-until-success', it stops at the first
2419 non-nil return value.
2421 *** New macro `with-wrapper-hook' for running an abnormal hook as a
2422 set of "wrapping" filters, similar to around advice.
2423 (A version of this macro was actually added in Emacs 23.2 but was not
2424 advertised at the time.)
2428 *** New macro `condition-case-unless-debug' (this was actually added in
2429 Emacs 23.1 as condition-case-no-debug, but not advertised)
2431 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
2433 *** Variable `stack-trace-on-error' removed.
2435 *** The debugger can now "continue" from an error, which means it will
2436 jump to the error handler as if the debugger had not been invoked
2437 instead of jumping all the way to the top-level.
2439 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
2440 This can be useful when `inhibit-quit' is set.
2442 ** The new function `server-eval-at' allows evaluation of Lisp forms on
2443 named Emacs server instances.
2445 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
2446 to redirect STDOUT to a file.
2448 ** The function `format-time-string' now supports the %N directive,
2449 for higher-resolution time stamps.
2451 ** New input reading functions
2453 *** New function `read-char-choice' reads a restricted set of
2454 characters, discarding any inputs not inside the set.
2456 *** The command `read-color' now requires a match for a color name
2457 or RGB triplet, instead of signaling an error if the user provides
2460 **** `facemenu-read-color' is now an alias for `read-color'.
2462 ** `image-library-alist' is renamed to `dynamic-library-alist'.
2463 The variable is now used to load all kind of supported dynamic libraries,
2464 not just image libraries. The previous name is still available as an
2467 ** Syntax parsing changes
2469 *** New variable `syntax-propertize-function'.
2470 This replaces `font-lock-syntactic-keywords' which is now obsolete.
2471 This allows syntax-table properties to be set independently from font-lock:
2472 just call syntax-propertize to make sure the text is propertized.
2473 Together with this new variable come a new hook
2474 syntax-propertize-extend-region-functions, as well as two helper functions:
2475 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
2476 as-is; and syntax-propertize-rules which provides a new way to specify
2479 *** Syntax tables support a new "comment style c" additionally to style b.
2481 ** New hook `post-self-insert-hook', run after `self-insert-command'.
2483 ** frame-local variables cannot be let-bound any more.
2485 ** Major and minor mode changes
2487 *** `set-auto-mode' now respects mode: local variables at the end of files,
2488 as well as those in the -*- line.
2490 *** `prog-mode' is a new major mode from which programming modes
2493 **** `prog-mode-hook' can be used to enable features for programming
2494 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
2495 on-the-fly spell checking for comments and strings.
2497 *** New hook `change-major-mode-after-body-hook', run by
2498 `run-mode-hooks' just before any other mode hooks.
2500 *** Enabled globalized minor modes can be disabled in specific major modes.
2501 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
2502 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
2504 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
2506 ** File-handling changes
2508 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
2509 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
2510 both non-nil. Interactively, TRASH defaults to t, unless a prefix
2511 argument is supplied (see Trash changes, above).
2513 *** New file predicates: `file-equal-p', `file-in-directory-p'.
2515 ** Tool-bars can display separators.
2516 Tool-bar separators are handled like menu separators in menu-bar maps,
2517 i.e. via menu entries of the form `(menu-item "--")'.
2521 *** Animated images support (currently animated gifs only).
2523 **** `image-animated-p' returns non-nil if an image can be animated.
2525 **** `image-animate' animates a supplied image spec.
2527 **** `image-animate-timer' returns the timer object for an image that
2530 *** `image-extension-data' has been renamed to `image-metadata'.
2531 The old name is an obsolete alias to the new one.
2533 *** Image mode can view any image type that ImageMagick supports.
2534 This requires Emacs to be built with ImageMagick support.
2536 **** New function `imagemagick-types', defined if ImageMagick support
2537 is enabled, returns a list of image file extensions that your
2538 ImageMagick installation supports.
2540 **** New function `imagemagick-register-types' enables ImageMagick
2541 image types in Image mode and in `create-image' and other helper
2544 **** New option `imagemagick-types-inhibit' excludes certain
2545 ImageMagick image types from `imagemagick-register-types'.
2547 **** With ImageMagick support, there are extra Image mode commands to
2548 resize and rotate images: `image-transform-fit-to-height',
2549 `image-transform-fit-to-width', `image-transform-set-rotation', and
2550 `image-transform-set-scale'.
2552 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
2553 passes it to the mail user agent function. This argument specifies an
2554 action for returning to the caller after finishing with the mail. For
2555 example, this is used by Rmail to optionally delete a mail window.
2557 ** XML and HTML parsing
2558 If Emacs is compiled with libxml2 support, there are two new
2559 functions: `libxml-parse-html-region' (which parses "real world" HTML)
2560 and `libxml-parse-xml-region' (which parses XML). Both return an
2561 Emacs Lisp parse tree.
2563 ** Networking and encryption changes
2565 *** `open-network-stream' can now be used to open an encrypted stream.
2566 It now accepts an optional `:type' parameter for initiating a TLS
2567 connection, directly or via STARTTLS. To do STARTTLS, additional
2568 parameters (`:end-of-command', `:success', `:capabilities-command')
2569 must also be supplied.
2571 *** New library gnutls.el.
2572 The new function `gnutls-available-p' returns non-nil if Emacs is
2573 built with GnuTLS support. The main entry points are
2574 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
2575 these functions through `open-network-stream', because that can
2576 upgrade connections through STARTTLS opportunistically or use plain
2577 SSL, depending on your needs. For debugging, set `gnutls-log-level'
2580 *** New primitive `secure-hash' that supports many secure hash algorithms:
2581 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
2582 sha1.el has been removed. The `sha1' feature is provided by default.
2586 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
2588 ** Progress reporters can now "spin".
2589 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
2590 now be nil, or omitted. This makes a "non-numeric" reporter. Each
2591 time you call `progress-reporter-update' on that progress reporter,
2592 with a nil or omitted VALUE argument, the reporter message is
2593 displayed with a "spinning bar".
2595 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
2596 being reverted, even if the buffer has a local `revert-buffer-function'.
2598 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
2599 If delayed-warnings-list is non-nil, the command loop calls
2600 `delayed-warnings-hook' after `post-command-hook'. At present, this
2601 is only used by Emacs on some platforms to display warnings during
2602 startup, which might otherwise not be noticed. This uses the
2603 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
2605 ** rx.el has a new `group-n' construct for explicitly numbered groups.
2607 ** New function `make-composed-keymap' that constructs a new keymap
2608 from multiple input maps. You can use this to make a keymap that
2609 inherits from multiple maps, eg:
2610 (set-keymap-parent newmap (make-composed-keymap othermap parent))
2612 ** New function `string-prefix-p'.
2613 (This was actually added in Emacs 23.2 but was not advertised at the time.)
2615 ** New reader macro ## that stands for the empty symbol.
2616 This means that the empty symbol can now be read back. Also, #: by itself
2617 (when not immediately followed by a possible symbol character) stands for
2618 an empty uninterned symbol.
2620 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
2622 ** The following functions and variables are obsolete:
2624 *** `tooltip-use-echo-area' is obsolete.
2625 Rather than setting this to t, disable Tooltip mode instead.
2627 *** buffer-substring-filters is obsolete.
2628 Use `filter-buffer-substring-functions' instead.
2630 *** `byte-compile-disable-print-circle' is obsolete.
2632 *** `deferred-action-list' and `deferred-action-function' are obsolete.
2633 Use `post-command-hook' instead.
2635 *** `font-lock-maximum-size' is obsolete.
2638 * Changes in Emacs 24.1 on Non-Free Operating Systems
2640 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
2641 and also when HOME is set to C:\ by default.
2643 ** New configure.bat options
2645 *** --enable-checking builds Emacs with extra runtime checks.
2647 *** --distfiles specifies files to be included in binary distribution.
2649 *** --without-gnutls disables automatic GnuTLS detection.
2651 *** --lib for general library linkage, works with the USER_LIBS build variable.
2653 ** New make target `dist' to create binary distribution for MS Windows.
2655 ** The Lisp function `w32-default-color-map' is now obsolete.
2656 (It is only used internally in the Emacs C code.)
2658 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
2659 reappear on mouse-over. (Requires OS X 10.6 or later.)
2661 ** On Mac OS X, dragging a file into Emacs visits the file, like on
2662 other platforms, rather than inserting its contents into the buffer.
2665 ----------------------------------------------------------------------
2666 This file is part of GNU Emacs.
2668 GNU Emacs is free software: you can redistribute it and/or modify
2669 it under the terms of the GNU General Public License as published by
2670 the Free Software Foundation, either version 3 of the License, or
2671 (at your option) any later version.
2673 GNU Emacs is distributed in the hope that it will be useful,
2674 but WITHOUT ANY WARRANTY; without even the implied warranty of
2675 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2676 GNU General Public License for more details.
2678 You should have received a copy of the GNU General Public License
2679 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2684 paragraph-separate: "[
\f]*$"