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'.
31 ** The configure option --with-crt-dir has been removed.
32 It is no longer needed, as the crt*.o files are no longer linked specially.
35 * Startup Changes in Emacs 24.4
38 * Changes in Emacs 24.4
41 ** `apropos-variable' is now `apropos-user-option'
42 `apropos-user-option' shows all user options while `apropos-variable'
43 shows all variables. When called with a universal prefix argument,
44 the two commands swap their behaviors. When `apropos-do-all' is
45 non-nil, they output the same results.
48 ** `eval-defun' on an already defined defcustom calls the :set function,
51 ** If the new variable `enable-dir-local-variables' is nil,
52 directory local variables are ignored. May be useful for some modes
53 that want to ignore directory-locals while still respecting file-locals.
55 ** The option `set-mark-default-inactive' has been deleted.
56 This unfinished feature was introduced by accident in Emacs 23.1;
57 simply disabling Transient Mark mode does the same thing.
59 ** `initial-buffer-choice' can now specify a function to set up the
62 ** ACL support has been added.
64 *** Emacs preserves the ACL entries of files when backing up.
66 *** New functions `file-acl' and `set-file-acl' get and set the ACL
67 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
68 libacl. On MS-Windows, the NT Security APIs are used to emulate the
71 ** New option `scroll-bar-adjust-thumb-portion'.
72 Available only on X, this option allows to control over-scrolling
73 using the scroll bar (i.e. dragging the thumb down even when the end
74 of the buffer is visible).
77 * Editing Changes in Emacs 24.4
79 ** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
80 bound to <f11> and M-<f10>, respectively.
82 ** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
86 * Changes in Specialized Modes and Packages in Emacs 24.4
88 ** Delphi mode is now called OPascal mode.
89 *** All delphi-* variables and functions have been renamed to opascal-*.
90 *** `delphi-newline-always-indents' is not supported any more
91 use `electric-indent-mode' instead.
92 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
94 ** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
96 ** completing-read-multiple's separator can now be a regexp.
97 The default separator is changed to allow surrounding spaces around the comma.
101 *** Battery information via the BSD `apm' utility is now supported.
105 *** New macro cl-tagbody.
108 *** letf is now just an alias for cl-letf.
112 *** Calc by default now uses the Gregorian calendar for all dates, and
113 uses January 1, 1 AD as its day number 1. Previously Calc used the
114 Julian calendar for dates before September 14, 1752, and it used
115 December 31, 1 BC as its day number 1; the new scheme is more
116 consistent with Calendar's calendrical system and day numbering.
118 *** The new variable `calc-gregorian-switch' lets you configure the
119 date when Calc switches from the Julian to the Gregorian calendar.
120 Nil, the default value, means to always use the Gregorian calendar.
121 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
124 *** Support for ISO 8601 dates.
128 *** New minor mode `dired-hide-details-mode' hides details.
132 *** New option `erc-accidental-paste-threshold-seconds'.
133 If set to a number, this can be used to avoid accidentally paste large
134 amounts of data into the ERC input.
136 ** Icomplete is a bit more like IDO.
137 *** key bindings to navigate through and select the completions.
138 *** The icomplete-separator is customizable, and its default has changed.
139 *** Removed icomplete-show-key-bindings.
143 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
144 visit the next image file and the previous image file in the same
145 directory, respectively.
147 *** New commands to show specific frames of multi-frame images.
148 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
149 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
152 *** The command `image-mode-fit-frame' deletes other windows.
153 When toggling, it restores the frame's previous window configuration.
154 It also has an optional frame argument, which can be used by Lisp
155 callers to fit the image to a frame other than the selected frame.
159 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
160 and adds it to the search string.
162 ** MH-E has been updated to MH-E version 8.5.
163 See MH-E-NEWS for details.
166 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
167 Customize `unrmail-mbox-format' to change this.
170 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
171 of how Rmail displays non-MIME messages.
174 ** New function `ses-rename-cell' to give SES cells arbitrary names.
176 ** trace-function was largely rewritten.
177 New features include:
178 - no prompting for the destination buffer, unless a prefix-arg was used.
179 - additionally to prompting for a destination buffer, when a prefix-arg is
180 used, the user can enter a "context", i.e. Lisp expression whose value at the
181 time the function is entered/exited will be printed along with the function
182 name and arguments. Useful to trace the value of (current-buffer) or
183 (point) when the function is invoked.
185 ** New command `delete-duplicate-lines' has two types of operation:
186 when its arg ADJACENT is non-nil (when called interactively with C-u C-u)
187 it works like the utility `uniq'. Otherwise by default it deletes
188 duplicate lines everywhere in the region without regard to adjacency.
190 ** New `cycle-spacing' command allows cycling between having just one
191 space, no spaces, or reverting to the original spacing. Like
192 `just-one-space' command it can handle or ignore newlines and
193 leave different number of spaces.
198 *** New connection method "adb", which allows to access Android
199 devices by the Android Debug Bridge. The variable `tramp-adb-program'
200 can be used to adapt the path of the "adb" program, if needed.
202 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
203 "scpc" and "rsyncc" are discontinued. The ssh option
204 "ControlMaster=auto" is set automatically in all ssh-based methods,
208 *** Handlers for `file-acl' and `set-file-acl' for remote machines
209 which support POSIX ACLs.
213 *** The commands `woman-default-faces' and `woman-monochrome-faces'
214 are obsolete. Customize the `woman-* faces instead.
216 ** Obsolete packages:
218 *** longlines.el is obsolete; use visual-line-mode instead.
220 *** terminal.el is obsolete; use term.el instead.
223 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
226 *** The Info-edit command is obsolete. Editing Info nodes by hand
227 has not been relevant for some time.
230 * New Modes and Packages in Emacs 24.4
231 ** New nadvice.el package offering lighter-weight advice facilities.
233 - add-function/remove-function which can be used to add/remove code on any
234 function-carrying place, such as process-filters or `<foo>-function' hooks.
235 - advice-add/advice-remove to add/remove a piece of advice on a named function,
236 much like `defadvice' does.
239 * Incompatible Lisp Changes in Emacs 24.4
241 ** Removed inhibit-local-menu-bar-menus.
243 ** frame-local variables that affect redisplay do not work any more.
244 More specifically, the redisplay does not bother to check for a frame-local
245 value when looking up variables.
247 ** nil and "unbound" are indistinguishable in symbol-function.
248 `symbol-function' never signals `void-function' any more.
249 `fboundp' returns non-nil if the symbol was `fset' to nil.
251 ** `defadvice' does not honor the `freeze' flag and cannot advise
252 special-forms any more.
254 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
255 VAR was bound to nil which was not tremendously useful and just lead to
256 spurious warnings about an unused var.
258 ** The return value of `backup-buffer' has changed.
259 The second argument is no longer an SELinux context, instead it is an
260 alist of extended attributes as returned by the new function
261 `file-extended-attributes'. The attributes can be applied to another
262 file using `set-file-extended-attributes'.
265 * Lisp Changes in Emacs 24.4
267 ** `dont-compile' is declared obsolete.
269 ** Support for filesystem notifications.
270 Emacs now supports notifications of filesystem changes, such as
271 creation, modification, and deletion of files. This requires the
272 'inotify' API on GNU/Linux systems. On MS-Windows systems, this is
273 supported for Windows XP and newer versions.
275 ** Changes in autorevert.el
278 *** If Emacs is compiled with file notification support, notifications
279 are used instead of checking the time stamp of the files. You can
280 disable this by setting the user option `auto-revert-use-notify' to
281 nil. Alternatively, a regular expression of directories to be
282 excluded from file notifications can be specified by
283 `auto-revert-notify-exclude-dir-regexp'.
286 *** The new user option `auto-revert-remote-files' enables reversion
287 of remote files when set to non-nil.
291 *** The `face-spec-set' is now analogous to `setq' for face specs.
292 Its third arg now accepts values specifying exactly which face spec to
293 set (defface, custom, or user spec), and it directly sets the relevant
294 property using the supplied face spec.
296 *** Face specs set via Custom themes now replace the `defface' spec
297 rather than inheriting from it (as do face specs set via Customize).
299 *** New face characteristic (supports :underline (:style wave))
300 specifies whether or not the terminal can display a wavy line.
305 *** `image-animated-p' is now `image-multi-frame-p'.
306 It returns non-nil for any image that contains multiple frames,
307 whether or not it specifies a frame delay.
310 *** When animating images that do not specify a frame delay,
311 Emacs uses `image-default-frame-delay'.
314 *** New functions `image-current-frame' and `image-show-frame' for getting
315 and setting the current frame of a multi-frame image.
317 ** time-to-seconds is not obsolete any more.
318 ** New function special-form-p.
319 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
320 text-property on the first char.
322 ** The `defalias-fset-function' property lets you catch calls to defalias
323 and redirect them to your own function instead of `fset'.
325 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
326 When you edit DIR/FILE, Emacs normally creates a symbolic link
327 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
328 is being edited. Formerly, if there was already a non-symlink file
329 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
330 through DIR/.#FILE.9. These fallbacks have been removed, so that
331 Emacs now no longer locks DIR/FILE in that case.
333 On file systems that do not support symbolic links, the lock is now a
334 regular file with contents being what would have been in the symlink.
336 ** The 9th element returned by `file-attributes' is now unspecified.
337 Formerly, it was t if the file's gid would change if file were deleted
338 and recreated. This value has been inaccurate for years on many
339 platforms, and nobody seems to have noticed or cared.
341 ** The function `file-ownership-preserved-p' now has an optional
342 argument GROUP which causes it check for file group too. This can be
343 used in place of the 9th element of `file-attributes'.
345 ** New functions `group-gid' and `group-real-gid'.
347 ** The 6th argument to `copy-file' has been renamed to
348 `preserve-extended-attributes' as it now handles both SELinux context
352 * Changes in Emacs 24.4 on Non-Free Operating Systems
355 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
356 The backtrace is written to the 'emacs_backtrace.txt' file in the
357 directory where Emacs was running.
360 ** The variable `buffer-file-type' is no longer supported.
361 Setting it has no effect, and %t in the mode-line format is ignored.
362 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
363 modifying it has no effect.
366 ** Lock files now work on MS-Windows.
367 This allows to avoid losing your edits if the same file is being
368 edited in another Emacs session or by another user. See the node
369 "Interlocking" in the Emacs User Manual for the details. To disable
370 file locking, customize `create-lockfiles' to nil.
372 ** Improved fullscreen support on Mac OS X.
373 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
374 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
375 native is the default.
378 * Installation Changes in Emacs 24.3
380 ** The default X toolkit is now Gtk+ version 3.
381 If you don't pass `--with-x-toolkit' to configure, or if you use
382 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
383 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
384 You can explicitly require a specific version by passing
385 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
387 ** New configure option `--enable-link-time-optimization', to utilize
388 an appropriate feature provided by GCC since version 4.5.0.
390 ** New configure option `--without-all' to disable most of the optional
391 features (image support, etc.) that are normally enabled by default.
393 ** New configure option `--enable-gcc-warnings' (for developing/debugging
394 Emacs). If building with GCC, this enables compile-time checks that
395 warn/give errors about possibly-questionable C code. On a recent GNU
396 system there should be no warnings; on older and on non-GNU systems
397 the results may be useful to developers.
399 ** The configure option `--enable-use-lisp-union-type' has been
400 renamed to `--enable-check-lisp-object-type', as the resulting
401 Lisp_Object type no longer uses a union to implement the compile time
402 check that this option enables.
404 ** The configure option `--disable-maintainer-mode' has been removed,
405 as it was confusingly-named and rarely useful.
407 ** The configure options `--program-prefix', `--program-suffix', and
408 `--program-transform-name' apply to more than just the installed
409 binaries. Now they also affect the man pages, icons, and the
410 etc/emacs.desktop file; but not the info pages, since this would break
411 links between the various manuals.
413 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
414 overwriting "emacs" in the installation bin/ directory with a link
417 ** Emacs uses libtinfo in preference to libncurses, if available.
419 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
420 /usr/pkg/lib to the linker search path. You must add them yourself if
423 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
424 (from the bin and libexec directories, respectively). The former is
425 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
428 * Startup Changes in Emacs 24.3
430 ** Emacs no longer searches for `leim-list.el' files beneath the standard
431 lisp/ directory. There should not be any there anyway. If you have
432 been adding them there, put them somewhere else; e.g., site-lisp.
434 ** The `--no-site-lisp' command line option now works for Nextstep builds.
437 * Changes in Emacs 24.3
441 *** `C-h f' (`describe-function') can now perform autoloading.
442 When this command is called for an autoloaded function whose docstring
443 contains a key substitution construct, that function's library is
444 automatically loaded, so that the documentation can be shown
445 correctly. To disable this, set `help-enable-auto-load' to nil.
447 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
448 even after their associated libraries have been loaded (and the
449 autoloads have been redefined as functions).
453 *** Images displayed via ImageMagick now support transparency and the
454 :background image specification property.
456 *** When available, ImageMagick support is automatically enabled.
457 It is no longer necessary to call `imagemagick-register-types'
458 explicitly to install ImageMagick image types; that function is called
459 automatically at startup, or when customizing an imagemagick- option.
461 *** Setting `imagemagick-types-inhibit' to t now disables the use of
462 ImageMagick to view images. (You must call `imagemagick-register-types'
463 afterwards if you do not use customize to change this.)
465 *** The new variable `imagemagick-enabled-types' also affects which
466 ImageMagick types are treated as images. The function
467 `imagemagick-filter-types' returns the list of types that will be
472 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
473 next and previous path separator, respectively.
475 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
476 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
477 non-nil before enabling the mode.
481 *** New option `mode-line-default-help-echo' specifies the help text
482 (shown in a tooltip or in the echo area) for any part of the mode line
483 that does not have its own specialized help text.
485 *** You can now click mouse-3 in the coding system indicator to invoke
486 `set-buffer-file-coding-system'.
490 *** emacsclient now obeys string values for `initial-buffer-choice',
491 if it is told to open a new frame without specifying any file to visit
492 or expression to evaluate.
494 *** New option `server-auth-key' specifies a shared server key.
496 ** Emacs now generates backtraces on fatal errors.
497 On encountering a fatal error, Emacs now outputs a textual description
498 of the fatal signal, and a short backtrace on platforms like glibc
499 that support backtraces.
501 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
502 This minor mode replaces `toggle-read-only', which is now obsolete.
504 ** Most `y-or-n' prompts now allow you to scroll the selected window.
505 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
506 respectively, without exiting from the prompt.
508 ** In the Package Menu, newly-available packages are listed as "new",
509 and sorted above the other "available" packages by default.
511 ** If your Emacs was built from a bzr checkout, the new variable
512 `emacs-bzr-version' contains information about the bzr revision used.
514 ** New option `create-lockfiles' specifies usage of lockfiles.
515 It defaults to t. Changing it to nil inhibits the creation of lock
516 files (use this with caution).
518 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
519 variables on remote hosts.
521 ** The entry for PCL-CVS has been removed from the Tools menu.
522 The PCL-CVS commands are still available via the keyboard.
524 ** Using "unibyte: t" in Lisp source files is obsolete.
525 Use "coding: raw-text" instead.
527 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
528 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
529 The previous binding, introduced in Emacs 24.1, was a mistake, because
530 `C-c LETTER' bindings are reserved for user customizations.
532 ** Internationalization
534 *** New language environment: Persian.
536 *** New input method `vietnamese-vni'.
538 ** Nextstep (GNUstep / Mac OS X) port
540 *** Support for fullscreen and the frame parameter fullscreen.
542 *** A file dialog is used for open/save operations initiated from the
546 * Editing Changes in Emacs 24.3
548 ** Search and Replace
550 *** Non-regexp Isearch now performs "lax" space matching.
551 Each sequence of spaces in the supplied search string may match any
552 sequence of one or more whitespace characters, as specified by the
553 variable `search-whitespace-regexp'. (This variable is also used by a
554 similar existing feature for regexp Isearch.)
556 *** New Isearch command `M-s SPC' toggles lax space matching.
557 This applies to both ordinary and regexp Isearch.
559 *** New option `replace-lax-whitespace'.
560 If non-nil, `query-replace' uses flexible whitespace matching too.
563 *** Global `M-s _' starts a symbol (identifier) incremental search,
564 and `M-s _' in Isearch toggles symbol search mode.
565 `M-s c' in Isearch toggles search case-sensitivity.
567 ** Navigation commands
569 *** New binding `M-g c' for `goto-char'.
571 *** New binding `M-g TAB' for `move-to-column'.
573 *** `M-g TAB' (`move-to-column') prompts for a column number if called
574 interactively with no prefix arg. Previously, it moved to column 1.
576 ** New option `yank-handled-properties' allows processing of text
577 properties on yanked text, in ways that are more general than just
578 removing them (as is done by `yank-excluded-properties').
580 ** New option `delete-trailing-lines' specifies whether
581 M-x delete-trailing-whitespace should delete trailing lines at the end
582 of the buffer. It defaults to t.
584 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
586 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
587 `ucs-insert' is now an obsolete alias for `insert-char'.
589 ** The `z' key no longer has a binding in most special modes.
590 It used to be bound to `kill-this-buffer', but `z' is too easy to
593 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
594 It copies the region-rectangle as the last rectangle kill.
598 *** `C-x r +' is now overloaded to invoke `append-to-register'.
600 *** New option `register-separator' specifies the register containing
601 the text to put between collected texts for use with
602 M-x append-to-register and M-x prepend-to-register.
605 * Changes in Specialized Modes and Packages in Emacs 24.3
607 ** Common Lisp emulation (CL)
609 *** CL's main entry is now (require 'cl-lib).
610 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
611 i.e., all its definitions have the "cl-" prefix (and internal definitions
612 use the "cl--" prefix).
614 If `cl' provided a feature under the name `foo', then `cl-lib'
615 provides it under the name `cl-foo' instead; with the exceptions of the
616 few `cl' definitions that had to use `foo*' to avoid conflicts with
617 pre-existing Elisp entities. These have been renamed to `cl-foo'
618 rather than `cl-foo*'.
620 The old `cl' is now deprecated and is mainly just a bunch of aliases that
621 provide the old, non-prefixed names. Some exceptions are listed below:
623 *** `cl-flet' is not like `flet' (which is deprecated).
624 Instead it obeys the behavior of Common-Lisp's `flet'.
625 In particular, in cl-flet function definitions are lexically scoped,
626 whereas in flet the scoping is dynamic.
628 *** `cl-labels' is slightly different from `labels'.
629 The difference is that it relies on the `lexical-binding' machinery
630 (as opposed to the `lexical-let' machinery used previously) to capture
631 definitions in closures, so such closures will only work if `lexical-binding'
634 *** `cl-letf' is not exactly like `letf'.
635 The only difference is in details that relate to some deprecated usage
636 of `symbol-function' in place forms.
638 *** `progv' was rewritten to use the `let' machinery.
639 A side effect is that variables without corresponding values are bound
640 to nil rather than being made unbound.
642 *** The following methods of extending `setf' are obsolete
643 (use features from gv.el instead):
644 `define-modify-macro' (use `gv-letplace')
645 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
646 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
647 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
651 *** Changes are now highlighted using the same color scheme as in
652 modern VCSes. Deletions are displayed in red (new faces
653 `diff-refine-removed' and `smerge-refined-removed', and new definition
654 of `diff-removed'), insertions in green (new faces `diff-refine-added'
655 and `smerge-refined-added', and new definition of `diff-added').
657 *** The variable `diff-use-changed-face' defines whether to use the
658 face `diff-changed', or `diff-removed' and `diff-added' to highlight
659 changes in context diffs.
661 *** The new command `diff-delete-trailing-whitespace' removes trailing
662 whitespace introduced by a diff.
664 ** Ediff now uses the same color scheme as Diff mode.
668 A new version of python.el, which provides several new features, including:
669 per-buffer shells, better indentation, Python 3 support, and improved
670 shell-interaction compatible with iPython (and virtually any other
673 *** Some user options have been replaced/renamed, including (old -> new):
674 **** python-indent -> python-indent-offset
675 **** python-guess-indent -> python-indent-guess-indent-offset
676 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
677 **** python-use-skeletons -> python-skeleton-autoinsert
679 *** Some user options have been removed, including:
681 **** `python-indent-string-contents': Strings are never indented.
683 **** `python-honour-comment-indentation':
684 Comments are always considered as indentation markers.
686 **** `python-continuation-offset': Indentation is automatically
687 calculated in a pep8 compliant way depending on the context.
689 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
690 Have no direct mapping as the shell interaction is completely different.
692 **** `python-python-command', `python-jython-command':
693 Replaced by `python-shell-interpreter'.
695 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
696 `python-pdbtrack-minor-mode-string', `python-source-modes':
699 *** Some commands have been replaced (old -> new):
700 **** python-insert-class -> python-skeleton-class
701 **** python-insert-def -> python-skeleton-def
702 **** python-insert-for -> python-skeleton-for
703 **** python-insert-if -> python-skeleton-if
704 **** python-insert-try/except -> python-skeleton-try
705 **** python-insert-try/finally -> python-skeleton-try
706 **** python-insert-while -> python-skeleton-while
707 **** python-find-function -> python-nav-jump-to-defun
708 **** python-next-statement -> python-nav-forward-sentence
709 **** python-previous-statement -> python-nav-backward-sentence
710 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
711 **** python-end-of-defun-function -> python-nav-end-of-defun
712 **** python-send-buffer -> python-shell-send-buffer
713 **** python-send-defun -> python-shell-send-defun
714 **** python-send-region -> python-shell-send-region
715 **** python-send-region-and-go -> emulate with python-shell-send-region
716 and python-shell-switch-to-shell
717 **** python-send-string -> python-shell-send-string
718 **** python-switch-to-python -> python-shell-switch-to-shell
719 **** python-describe-symbol -> python-eldoc-at-point
723 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
725 *** The D-Bus object manager interface is implemented.
727 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
728 if their value does not fit into Emacs's integer range.
730 *** The function `dbus-call-method' is now non-blocking.
731 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
733 *** Signals can also be sent as unicast messages.
735 *** The argument list of `dbus-register-signal' has been extended,
736 according to the new match rule types of D-Bus.
738 *** `dbus-init-bus' supports private connections.
740 *** There is a new function `dbus-setenv'.
742 ** `desktop-path' no longer includes the "." directory.
743 Desktop files are now located in ~/.emacs.d by default.
747 *** `dired-do-async-shell-command' executes each file sequentially
748 if the command ends in `;' (when operating on multiple files).
749 Otherwise, it executes the command on each file in parallel.
751 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
752 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
755 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
756 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
757 mark/unmark/flag all files in the active region.
759 *** The minibuffer default for `=' (`dired-diff) has changed.
760 It is now the backup file for the file at point, if one exists.
761 In Transient Mark mode the default is the file at the active mark.
763 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
764 The global binding for `M-=', `count-words-region' is in effect.
768 *** New module "notifications", which can send a notification when you
769 receive a private message or your nickname is mentioned.
771 *** ERC will look up server/channel names via auth-source and use any
774 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
775 only applies to messages sent by lurkers.
777 ** reStructuredText mode
779 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
780 fontification, comment handling, and customization have all been revised
783 *** Support for `imenu' and `which-function-mode'.
785 *** The reStructuredText syntax is more closely covered.
786 Sphinx support has been improved.
788 *** `rst-insert-list' inserts new list or continues existing lists.
790 *** A negative prefix argument always works for `rst-adjust'.
792 *** The window configuration is reset after displaying a TOC.
794 *** The constant `rst-version' describes the rst.el package version.
798 *** Support for percent literals and recognition of regular expressions
799 in method calls without parentheses with more methods, including Cucumber
802 *** Improved syntax highlighting and indentation.
804 *** New command `ruby-toggle-block', bound to `C-c {'.
806 *** Some non-standard keybindings/commands have been removed:
808 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
810 **** `ruby-mark-defun'; use `mark-defun'.
812 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
813 appropriate settings for the variables `beginning-of-defun-function'
814 and `end-of-defun-function'.
816 **** Non-standard keybindings for `backward-kill-word', `comment-region',
817 `reindent-then-newline-and-indent' and `newline' have been removed.
821 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
823 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
825 *** `sh-use-smie' lets you choose a new indentation and navigation code.
829 *** The free software compiler GHDL is supported (and now the default).
831 *** Support for the VHDL-AMS packages has been added/updated.
833 *** Updated to the 2002 revision of the VHDL standard.
835 *** Accepts \r and \f as whitespace.
839 *** The faces used by Apropos are now directly customizable.
840 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
841 see the `apropos' Custom group for details.
843 *** The old options whose values specified faces to use have been removed
844 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
848 *** This package has been rewritten to use Tabulated List mode.
850 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
851 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
855 *** Algebraic simplification mode is now the default.
856 To restrict to the limited simplifications given by the former
857 default simplification mode, use `m I'.
861 *** You can customize the header text that appears above each calendar month.
862 See the variable `calendar-month-header'.
864 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
866 *** The calendars produced by cal-html include holidays.
867 Customize `cal-html-holidays' to change this.
871 *** The major modes from the parser generators "Bovine" and "Wisent"
872 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
873 are in `auto-mode-alist', and the corresponding manuals are included.
877 **** Menu support for the "Configuration" feature. This allows users to
878 choose the active configuration (such as debug or install) from the menu.
880 **** New command `ede-set' to interactively set project-local variables.
882 **** Support for compiling, debugging, and running in "generic" projects.
884 **** Autoconf editing support for M4 macros with complex arguments.
886 **** Compilation support for the "linux" project type.
888 **** "simple" projects have been removed; use "generic" projects instead.
892 **** Support for parsing #include statements inside a namespace in C/C++.
894 **** Improved support for 'extern "C"' declarations in C/C++.
896 **** The ability to ignore more common special C/C++ preprocessor symbols,
897 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
898 If available, include cdefs.h as an additional source of preprocessor symbols.
900 **** Improved C/C++ function pointer parsing.
902 **** In Python, support for converting imports to include file names.
904 **** Ability to dynamically determine the Python load path.
906 **** Support for the Python 'WITH' and 'AT' keywords.
908 **** Improved tooltip completion.
912 **** The SRecode manual is now included.
914 **** Tag generation supports constructor/destructor settings and system
915 include differentiation.
917 **** Addition of 'Framework' support: Frameworks are specified when a
918 particular kind of library (such as Android) is needed in a common language
921 **** Support for nested templates and let variables override based on priority.
923 **** Support for merging tables from multiple related modes, such as
924 default -> c++ -> arduino.
926 ** Compile has a new option `compilation-always-kill'.
930 *** `custom-reset-button-menu' now defaults to t.
932 *** Non-option variables are never matched in `customize-apropos' and
933 `customize-apropos-options' (i.e., the prefix argument does nothing for
938 *** The variables `term-default-fg-color' and `term-default-bg-color'
939 are now deprecated in favor of the customizable face `term'.
941 *** You can customize how to display ANSI terminal colors and styles
942 by customizing the corresponding `term-color-<COLOR>',
943 `term-color-underline' and `term-color-bold' faces.
947 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
949 *** Remote processes are now also supported on remote MS-Windows hosts.
953 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
954 Previously, this slot stored semicolon-separated attribute-value pairs
955 appended to some imap URLs, but this is not compatible with RFC 3986.
956 So now the `filename' slot stores the entire path and query components,
957 and the `attributes' slot is always nil.
959 *** New function `url-encode-url' for encoding a URI string.
960 The `url-retrieve' function now uses this to encode its URL argument,
961 in case that is not properly encoded.
963 ** notifications.el supports now version 1.2 of the Notifications API.
964 The function `notifications-get-capabilities' returns the supported
967 ** Flymake uses fringe bitmaps to indicate errors and warnings.
968 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
969 `flymake-warning-bitmap'.
971 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
972 specifying URL types that should be converted to remote file names at
973 the FFAP prompt. The default is now '("ftp").
975 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
976 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
978 ** New option `mouse-avoidance-banish-position' specifies where the
979 `banish' mouse avoidance setting moves the mouse.
981 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
982 closing brackets to be aligned with the line of the opening bracket.
984 ** In Proced mode, new command `proced-renice' renices marked processes.
986 ** New option `async-shell-command-buffer' specifies the buffer to use
987 for a new asynchronous `shell-command' when the default output buffer
988 `*Async Shell Command*' is already in use.
990 ** SQL mode has a new option `sql-db2-escape-newlines'.
991 If non-nil, newlines sent to the command interpreter will be escaped
992 by a backslash. The default does not escape the newlines and assumes
993 that the sql statement will be terminated by a semicolon.
995 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
996 (and modes that derive from it), sorts the column at point, or the Nth
997 column if a numeric prefix argument is given.
999 ** `which-func-modes' now defaults to t, so Which Function mode, when
1000 enabled, applies to all applicable major modes.
1002 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1005 ** Follow mode no longer works by using advice.
1006 The option `follow-intercept-processes' has been removed.
1008 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1010 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1011 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1012 *** semantic-change-hooks -> semantic-change-functions
1013 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1014 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1015 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1016 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1017 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1018 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1019 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1020 *** rcirc-activity-hooks -> rcirc-activity-functions
1021 *** rcirc-print-hooks -> rcirc-print-functions
1022 *** dbus-event-error-hooks -> dbus-event-error-functions
1023 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1024 *** checkdoc-style-hooks -> checkdoc-style-functions
1025 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1026 *** archive-extract-hooks -> archive-extract-hook
1027 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1028 *** hfy-post-html-hooks -> hfy-post-html-hook
1029 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1030 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1031 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1032 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1034 ** Obsolete packages
1037 In most cases, assoc+member+push+delq work just as well.
1038 And in any case it's just a terrible package: ugly semantics, terrible
1039 inefficiency, and not namespace-clean.
1048 * Incompatible Lisp Changes in Emacs 24.3
1050 ** Docstrings starting with `*' no longer indicate user options.
1051 Only variables defined using `defcustom' are considered user options.
1052 The function `user-variable-p' is now an obsolete alias for
1053 `custom-variable-p'.
1055 ** The return values of `defalias', `defun' and `defmacro' have changed,
1056 and are now undefined. For backwards compatibility, `defun' and
1057 `defmacro' currently return the name of the newly defined
1058 function/macro, but this should not be relied upon.
1060 ** `random' by default now returns a different random sequence in
1061 every Emacs run. Use `(random S)', where S is a string, to set the
1062 random seed to a value based on S, in order to get a repeatable
1063 sequence in later calls.
1065 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1066 that substring is inserted literally even if the LITERAL arg is
1067 non-nil, instead of causing an error to be signaled.
1069 ** `select-window' now always makes the window's buffer current.
1070 It does so even if the window was selected before.
1072 ** The function `x-select-font' can return a font spec, instead of a
1073 font name as a string. Whether it returns a font spec or a font name
1074 depends on the graphical library.
1076 ** `face-spec-set' no longer sets frame-specific attributes when the
1077 third argument is a frame (that usage was obsolete since Emacs 22.2).
1079 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1081 ** The CL package's `get-setf-method' function no longer exists.
1082 Generalized variables are now part of core Emacs Lisp, and implemented
1083 differently to the way cl.el used to do it. It is not possible to
1084 define a compatible replacement for `get-setf-method'. See the file
1085 gv.el for internal details of the new implementation.
1087 ** The arguments of `dbus-register-signal' are no longer just strings,
1088 but keywords or keyword-string pairs. The old argument list will
1089 still be supported for Emacs 24.x.
1091 ** Miscellaneous name changes
1092 Some Lisp symbols have been renamed to correct their spelling,
1093 or to be more consistent with standard Emacs terminology.
1095 *** Renamed functions
1096 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1097 **** inactivate-input-method -> deactivate-input-method
1098 **** quail-inactivate -> quail-deactivate
1099 **** robin-inactivate -> robin-deactivate
1100 **** viper-inactivate-input-method -> viper-deactivate-input-method
1101 **** viper-inactivate-input-method-action ->
1102 viper-deactivate-input-method-action
1103 **** ucs-input-inactivate -> ucs-input-deactivate
1106 The old hooks are still supported for backward compatibility, but they
1107 are deprecated and will be removed eventually.
1108 **** input-method-inactivate-hook -> input-method-deactivate-hook
1109 **** robin-inactivate-hook -> robin-deactivate-hook
1110 **** quail-inactivate-hook -> quail-deactivate-hook
1112 *** Renamed variables
1113 **** follow-deactive-menu -> follow-inactive-menu
1114 **** inactivate-current-input-method-function ->
1115 deactivate-current-input-method-function
1117 ** Some obsolete functions, variables, and faces have been removed:
1118 *** `last-input-char', `last-command-char', `unread-command-char'
1119 *** `facemenu-unlisted-faces'
1120 *** `rmail-decode-mime-charset'
1121 *** `iswitchb-read-buffer'
1122 *** `sc-version', `sc-submit-bug-report'
1123 *** `set-char-table-default'
1124 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1125 *** `compile-internal'
1127 *** `mode-line-inverse-video'
1128 *** `follow-mode-off-hook'
1129 *** `cvs-commit-buffer-require-final-newline'
1130 (use `log-edit-require-final-newline' instead)
1131 *** `cvs-changelog-full-paragraphs'
1132 (use `log-edit-changelog-full-paragraphs' instead)
1133 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1134 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1135 *** `vc-master-templates' (use `vc-handled-backends' instead)
1136 *** `vc-checkout-carefully'
1139 * Lisp Changes in Emacs 24.3
1141 ** CL-style generalized variables are now in core Elisp.
1142 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1143 You can define your own generalized variables using `gv-define-simple-setter',
1144 `gv-define-setter', etc.
1146 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1147 This can significantly speed up execution of non-byte-compiled code,
1148 but can also bump into previously unnoticed cyclic dependencies.
1149 These are generally harmless: they will simply cause the macro calls
1150 to be left for later expansion (as before), but will result in a
1151 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1152 You may wish to restructure your code so this does not happen.
1154 ** New sampling-based Elisp profiler.
1155 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1156 When finished, use M-x profiler-stop. The sampling rate can be based on
1157 CPU time or memory allocations.
1159 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1160 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1162 ** New macros `setq-local' and `defvar-local'.
1164 ** Face underlining can now use a wave.
1166 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1167 of `read-regexp' accepts a string ending with a colon and space, and its
1168 second argument DEFAULTS can be a list of strings accessible via `M-n'
1169 in the minibuffer ahead of other hard-coded useful regexp-related values.
1170 More commands use `read-regexp' now to read their regexp arguments.
1174 *** New function `completion-table-with-quoting' to handle completion
1175 in the presence of quoting, such as file completion in shell buffers.
1177 *** New function `completion-table-subvert' to use an existing completion
1178 table, but with a different prefix.
1182 *** New error type and new function `user-error'.
1183 These do not trigger the debugger.
1185 *** New option `debugger-bury-or-kill', saying what to do with the
1186 debugger buffer when exiting debug.
1188 *** Set `debug-on-message' to enter the debugger when a certain
1189 message is displayed in the echo area. This can be useful when trying
1190 to work out which code is doing something.
1192 *** New var `inhibit-debugger', automatically set to prevent accidental
1193 recursive invocations.
1197 *** New command `fit-frame-to-buffer' adjusts the frame height to
1200 *** The command `fit-window-to-buffer' can adjust the frame height
1201 if the new option `fit-frame-to-buffer' is non-nil.
1203 *** New macro `with-temp-buffer-window', similar to
1204 `with-output-to-temp-buffer'.
1206 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1209 *** New option `switch-to-buffer-preserve-window-point' to restore a
1210 window's point when switching buffers.
1212 *** New display action alist entries `window-height' and `window-width'
1213 specify the size of new windows created by `display-buffer'.
1215 *** New display action alist entry `pop-up-frame-parameters', if
1216 non-nil, specifies frame parameters to give any newly-created frame.
1218 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1219 tells display action functions to avoid changing which frame is
1222 *** New display action alist entry `previous-window', if non-nil,
1223 specifies window to reuse in `display-buffer-in-previous-window'.
1225 *** New display action functions `display-buffer-below-selected',
1226 and `display-buffer-in-previous-window'.
1228 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1229 now accept a third argument to avoid choosing the selected window.
1231 *** Additional values recognized for option `window-combination-limit'.
1233 *** The following variables are obsolete, as they can be replaced by
1234 appropriate entries in the `display-buffer-alist' function introduced
1236 **** `dired-shrink-to-fit'
1237 **** `display-buffer-reuse-frames'
1238 **** `display-buffer-function'
1239 **** `special-display-buffer-names'
1240 **** `special-display-frame-alist'
1241 **** `special-display-function'
1242 **** `special-display-regexps'
1246 *** `current-time-string' no longer requires that its argument's year
1247 must be in the range 1000..9999. It now works with any year supported
1248 by the underlying C implementation.
1250 *** `current-time' now returns extended-format time stamps
1251 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1252 PSEC is typically a multiple of 1000 on current machines. Other
1253 functions that use this format, such as `file-attributes' and
1254 `format-time-string', have been changed accordingly. Old-format time
1255 stamps are still accepted.
1257 *** The format of timers in `timer-list' and `timer-idle-list' is now
1258 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1259 The PSECS slot is new, and uses picosecond resolution. It can be
1260 accessed via the new `timer--psecs' accessor.
1262 *** Last-modified time stamps in undo lists now are of the form
1263 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1267 *** Improved security when handling persistent objects:
1269 **** `eieio-persistent-read' now features optional arguments for specifying
1270 the class to load, as well as a flag stating whether subclasses are allowed;
1271 if provided, other classes will be rejected by the reader. For
1272 compatibility with existing code, if the class is omitted only a
1275 **** New specialized reader for pulling in classes and signaling errors
1276 without evaluation of suspicious code.
1278 **** All slots that contain objects must have a :type. Slots with lists
1279 of objects must use a new type predicate for a list of an object type.
1281 *** Support for `find-function' and similar utilities, through the addition
1282 of filename support to generated symbols.
1284 ** Floating point functions now always return special values like NaN,
1285 instead of signaling errors, if given invalid args; e.g., (log -1.0).
1286 Previously, they returned NaNs on some platforms but signaled errors
1287 on others. The affected functions are acos, asin, tan, exp, expt,
1288 log, log10, sqrt, and mod.
1290 ** New fringe bitmap `exclamation-mark'.
1292 ** Miscellaneous changes to special forms and macros
1294 *** `defun' and `defmacro' are now macros rather than special forms.
1296 *** `kbd' is now a function rather than a macro.
1298 ** Miscellaneous new functions
1300 *** `set-temporary-overlay-map' sets up a temporary keymap that
1301 takes precedence over most other maps for a short while (normally one key).
1303 *** `autoloadp' tests if its argument is an autoloaded object.
1305 *** `autoload-do-load' performs the autoloading operation.
1307 *** `buffer-narrowed-p' tests if the buffer is narrowed.
1309 *** `file-name-base' returns a file name sans directory and extension.
1311 *** `function-get' fetches a function property, following aliases.
1313 *** `posnp' tests if an object is a `posn'.
1315 *** `system-users' returns the user names on the system.
1317 *** `system-groups' returns the group names on the system.
1319 *** `tty-top-frame' returns the topmost frame of a text terminal.
1321 ** The following functions and variables are obsolete:
1322 *** `automount-dir-prefix' (use `directory-abbrev-alist')
1323 *** `buffer-has-markers-at'
1324 *** `macro-declaration-function' (use `macro-declarations-alist')
1325 *** `window-system-version' (provides no useful information)
1326 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
1327 *** `query-replace-interactive'
1328 *** `font-list-limit' (has had no effect since Emacs < 23)
1331 * Changes in Emacs 24.3 on Non-Free Operating Systems
1333 ** Cygwin builds can use the native MS Windows user interface.
1334 Pass `--with-w32' to configure. The default remains the X11 interface.
1336 ** Two new functions are available in Cygwin builds:
1337 `cygwin-convert-file-name-from-windows' and
1338 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
1339 code to access the Cygwin file-name mapping machinery to convert
1340 between Cygwin and Windows-native file and directory names.
1342 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
1343 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
1344 `mouse-autoselect-window'.
1346 ** On MS Windows Vista and later Emacs now supports symbolic links.
1348 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
1349 support for libxml2, even if its presence is detected.
1351 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1353 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
1354 directories to the search path. You must add them yourself if you want them.
1357 * Changes in Emacs 24.2
1359 ** This is mainly a bug-fix release.
1362 * Installation Changes in Emacs 24.1
1364 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1365 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1366 also depend on Gtk+. You can disable them with --without-rsvg and
1369 ** Emacs can be compiled with GnuTLS support.
1370 This happens by default if a suitably recent version of the library is
1371 found at build time. To prevent this, use the configure option
1372 `--without-gnutls'. See below for GnuTLS features.
1374 ** Emacs can be compiled with SELinux support.
1375 This happens by default if a suitably recent version of the library is
1376 found at build time. To prevent this, use the configure option
1377 `--without-selinux'. See below for SELinux features.
1379 ** Emacs can be compiled with ImageMagick support.
1380 This happens by default if a suitably recent version of the library is
1381 found at build time. To prevent this, use the configure option
1382 `--without-imagemagick'. See below for ImageMagick features.
1383 This feature is not available for the Nextstep or MS ports.
1385 ** Emacs can be compiled with libxml2 support.
1386 This happens by default if a suitably recent version of the library is
1387 found at build time. To prevent this, use the configure option
1388 `--without-xml2'. See below for libxml2 features.
1390 ** By default, the installed Info and man pages are compressed.
1391 You can disable this by configuring --without-compress-info.
1393 ** New configure option --with-wide-int.
1394 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
1395 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1398 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
1399 These provide no new functionality, they just remove the need to edit
1400 lib-src/Makefile by hand in order to use the associated features.
1402 ** New configure option --enable-use-lisp-union-type.
1403 This is only useful for Emacs developers to debug certain types of bugs.
1404 This is not a new feature; only the configure flag is new.
1406 ** The standalone programs digest-doc and sorted-doc are removed.
1407 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1409 ** The standalone program `fakemail' is removed.
1410 If you need it, feedmail.el provides a superset of the functionality.
1413 * Startup Changes in Emacs 24.1
1415 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1416 command line arguments, and the EMACS_UNIBYTE environment variable, no
1417 longer have any effect. (They were declared obsolete in Emacs 23.)
1419 ** New command line option `--no-site-lisp' removes site-lisp directories
1420 from load-path. -Q now implies this. This option does not affect the
1421 EMACSLOADPATH environment variable (and hence has no effect for
1425 * Changes in Emacs 24.1
1429 *** Many packages now use the `completion-at-point' command,
1430 rather than implementing separate completion commands.
1432 *** `completion-at-point' now handles tags and semantic completion.
1434 *** Completion in a non-minibuffer now tries to detect the end of completion
1435 and pops down the *Completions* buffer accordingly.
1437 *** New option `completion-cycle-threshold' allows completion cycling.
1439 *** New option `completion-category-overrides' for overriding the
1440 default completion style in certain circumstances.
1442 *** New completion style `substring'.
1444 *** Completion of buffer names uses `substring' completion by default.
1446 *** The option `widget-complete-field' has been removed.
1450 *** The first time you try sending mail, Emacs asks for a mail method.
1451 This is implemented by a new default for `send-mail-function', which
1452 is `sendmail-query-once'. This offers to use the smtpmail package, or
1453 to use the old defaults relying on external mail facilities
1454 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
1455 `mailclient-send-it' on Windows).
1457 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
1458 transfers the report to your desktop's preferred mail client, if there
1459 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
1462 *** See Changes in Specialized Modes and Packages for SMTPmail changes
1463 and Mail mode changes
1465 ** Emacs server and client changes
1467 *** New option `server-port' specifies the port for TCP Emacs servers.
1469 *** New emacsclient argument -q/--quiet suppresses some status messages.
1471 *** New emacsclient argument --frame-parameters specifies the frame
1472 parameters of any newly-created graphical frame.
1474 *** If emacsclient shuts down due to Emacs signaling an error,
1475 its exit status is 1.
1477 *** New emacsclient argument --parent-id ID.
1478 This opens a client frame in parent X window ID, via XEmbed, similar
1479 to the --parent-id argument to Emacs.
1481 ** Internationalization changes
1483 *** Emacs now supports display and editing of bidirectional text.
1484 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1485 displayed in the correct visual order as expected by users of those
1486 scripts. The display reordering is a "full bidirectionality" class
1487 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1488 with no RTL text should look exactly the same as before.
1490 **** New buffer-local variable `bidi-display-reordering'.
1491 To disable display reordering in a buffer, change this to nil.
1493 **** New buffer-local variable `bidi-paragraph-direction'.
1494 If nil (the default), Emacs determines the base direction of each
1495 paragraph from its text, as specified by the UBA. Setting the value
1496 to `right-to-left' or `left-to-right' forces a base direction on each
1499 Paragraphs with right-to-left base direction are displayed starting at
1500 the right window edge.
1502 *** Enhanced support for characters with no glyphs in available fonts,
1503 or, on text terminals, characters that cannot be encoded by the
1504 terminal coding system. The new option `glyphless-char-display-control'
1505 specifies how to display them: as a hexadecimal code in a box, a thin
1506 1-pixel space, an empty box, etc.
1508 *** New input methods for Farsi and Bulgarian
1509 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
1511 *** `nobreak-char-display' now also highlights Unicode hyphen chars
1512 (U+2010 and U+2011).
1514 *** New Hebrew translation of the Emacs Tutorial.
1515 Type `C-u C-h t' to choose it in case your language setup doesn't
1516 automatically select it.
1518 ** An Emacs Lisp package manager is now included.
1519 This is a convenient way to download and install additional packages,
1520 from a package repository at http://elpa.gnu.org.
1522 *** M-x list-packages shows a list of packages, which can be
1523 selected for installation.
1525 *** New command `describe-package', bound to `C-h P'.
1527 *** By default, all installed packages are loaded automatically when
1528 Emacs starts up. To disable this, set `package-enable-at-startup' to
1529 nil. To specify the packages to load, customize `package-load-list'.
1531 ** Custom theme changes
1533 *** New command `M-x customize-themes', which provides a convenient
1534 interface for enabling and disabling Custom themes.
1536 *** New option `custom-theme-load-path' is the load path for themes.
1537 Emacs no longer looks for Custom themes in `load-path'. The default
1538 value of `custom-theme-load-path' says to look for themes in
1539 `custom-theme-directory', followed by a subdirectory of
1540 `data-directory' named "themes/", which contains a small selection of
1541 built-in Custom themes.
1543 *** New option `custom-safe-themes' records known-safe theme files.
1544 If a theme is not in this list, Emacs queries before loading it, and
1545 offers to save the theme to `custom-safe-themes' automatically. By
1546 default, all themes included in Emacs are treated as safe.
1548 ** Improved GTK integration
1550 *** GTK scroll-bars are now placed on the right by default.
1551 The function `set-scroll-bar-mode' can change this.
1553 *** GTK tool bars can have just text, just images or images and text.
1554 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
1555 the default is taken from desktop settings.
1557 *** GTK tool bars can be placed on any edge of the frame.
1558 The frame-parameter tool-bar-position controls this. It takes the
1559 values top, left, right or bottom. The Options => Show/Hide menu has
1562 *** The default colors for selected text (the `region' face) are taken
1563 from the GTK theme when Emacs is built with GTK.
1565 *** Emacs uses GTK tooltips by default if built with GTK.
1566 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
1568 ** Graphical interface changes
1570 *** On graphical displays, the mode-line no longer ends in dashes.
1571 Also, the first dash (which does not indicate anything) is just
1572 displayed as a space.
1574 *** `menu-bar-select-buffer-function' lets you choose another operation
1575 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
1577 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
1578 built with Xft. These fonts can be set via X resources, for example:
1579 Emacs.pane.menubar.font: Courier-12
1583 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
1584 or if it receives a SIGINT signal in batch mode.
1586 *** `kill-emacs-hook' is now also run in batch mode.
1587 Third-party code which adds to `kill-emacs-hook' should check if they
1588 do the right thing in batch mode.
1590 ** Scrolling changes
1592 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
1593 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
1594 of buffer at first key-press (instead they move to top/bottom of buffer)
1595 when `scroll-error-top-bottom' is non-nil.
1597 *** New option `scroll-error-top-bottom' (see above).
1599 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
1600 scroll a line instead of full screen.
1602 *** New property `scroll-command' should be set on a command's symbol to
1603 define it as a scroll command affected by `scroll-preserve-screen-position'.
1605 *** If you customize `scroll-conservatively' to a value greater than 100,
1606 Emacs will never recenter point in the window when it scrolls due to
1607 cursor motion commands or commands that move point (e.f., `M-g M-g').
1608 Previously, you needed to use `most-positive-fixnum' as the value of
1609 `scroll-conservatively' to achieve the same effect.
1611 *** "Aggressive" scrolling now honors the scroll margins.
1612 If you customize `scroll-up-aggressively' or
1613 `scroll-down-aggressively' and move point off the window, Emacs now
1614 scrolls the window so as to avoid positioning point inside the scroll
1617 ** Basic SELinux support has been added.
1618 This requires Emacs to be linked with libselinux at build time.
1620 *** Emacs preserves the SELinux file context when backing up.
1621 Also, the function `copy-file' has an extra optional argument for
1622 preserving SELinux context, and the return value of `backup-buffer'
1623 now includes the SELinux context.
1625 *** New functions `file-selinux-context' and `set-file-selinux-context'
1626 get and set the SELinux context of a file.
1630 *** `delete-by-moving-to-trash' now only affects commands that specify
1631 trashing. This avoids inadvertently trashing temporary files.
1633 *** Calling `delete-file' or `delete-directory' with a prefix argument
1634 now forces true deletion, regardless of `delete-by-moving-to-trash'.
1636 ** File- and directory-local variable changes
1638 *** You can stop directory local vars from applying to subdirectories.
1639 Add an element (subdirs . nil) to the alist portion of any variables
1640 settings to indicate that the section should not apply to
1643 *** Directory local variables can apply to some file-less buffers.
1644 Affected modes include dired, vc-dir, and log-edit. For example,
1645 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
1646 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
1647 `hack-dir-local-variables-non-file-buffer' to support this.
1649 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
1650 Instead, use "eval: (minor-mode 1)".
1652 *** The variable `inhibit-first-line-modes-regexps' has been renamed
1653 to `inhibit-local-variables-regexps'. As the name suggests, it now
1654 applies to ALL file local variables, not just -*- lines. The
1655 associated `inhibit-first-line-modes-suffixes' has been renamed in the
1660 *** The `quit-window' command now restores the last buffer displayed
1661 in the quitted window.
1663 *** Resizing an Emacs frame now preserves proportional window sizes,
1664 modulo restrictions like window minimum sizes and fixed-size windows.
1666 *** The behavior of `display-buffer' is now customizable in detail.
1668 **** New option `display-buffer-base-action' specifies a list of
1669 user-determined display "actions" (functions and optional arguments
1670 for choosing the displaying window).
1672 This takes precedence over the default display action, which is
1673 specified by `display-buffer-fallback-action'.
1675 **** New option `display-buffer-alist' maps buffer name regexps to
1676 display actions, taking precedence over `display-buffer-base-action'.
1678 *** New option `window-combination-limit'.
1679 The new option `window-combination-limit' allows to return the space
1680 obtained for resizing or creating a window more reliably to the window
1681 from which such space was obtained.
1683 *** New option `window-combination-resize'.
1684 The new option `window-combination-resize' allows to split a window that
1685 otherwise cannot be split because it's too small by stealing space from
1686 other windows in the same combination. Subsequent resizing or deletion
1687 of the window will resize all windows in the same combination as well.
1689 *** New option `frame-auto-hide-function' lets you choose between
1690 iconifying or deleting a frame when burying a buffer in a dedicated
1691 frame, or quitting a window showing a buffer in a frame of its own.
1693 *** New commands `maximize-window' and `minimize-window'.
1694 These maximize and minimize the size of a window within its frame.
1696 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
1697 These functions allow to navigate through the live buffers that have
1698 been shown in a specific window.
1700 ** Minibuffer changes
1702 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
1703 This is handy for minibuffer-only frames, and is also used for the feature
1704 where mouse-1 pops up *Messages*"', which can now easily be changed.
1706 *** Minibuffers set `truncate-lines' to nil.
1707 If you want to change the value to something else, you could use
1708 for example `minibuffer-setup-hook'.
1710 ** `auto-mode-case-fold' is now enabled by default.
1712 ** `backup-by-copying-when-mismatch' now defaults to t.
1714 ** New basic faces `error', `warning', `success'.
1715 These are used to highlight text indicating failure, caution or
1716 successful operation.
1718 ** New option `list-colors-sort' defines the color sort order
1719 for `list-colors-display'.
1721 ** The variable `focus-follows-mouse' now always defaults to nil.
1724 * Editing Changes in Emacs 24.1
1728 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
1729 `isearch-yank-line'.
1731 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
1732 `isearch-yank-kill'.
1734 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
1736 ** New commands `count-words-region' and `count-words'.
1738 *** M-= is bound to `count-words-region', not `count-lines-region'.
1739 The `count-words-region' command, when called interactively, reports
1740 the number of lines, words, and characters in the region. It is a
1741 superset of the old `count-lines-region', which is now an obsolete
1744 ** The command `just-one-space' (M-SPC), if given a negative argument,
1745 also deletes newlines around point.
1749 *** New option `delete-active-region'.
1750 If non-nil, [delete] and DEL delete the region if it is active and no
1751 prefix argument is given. If set to `kill', those commands kill
1754 *** New command `delete-forward-char', bound to [delete].
1755 This is meant for interactive use, and obeys `delete-active-region'.
1756 The command `delete-char' does not obey `delete-active-region'.
1758 *** `delete-backward-char' is now a Lisp function.
1759 Apart from obeying `delete-active-region', its behavior is unchanged.
1760 However, the byte compiler now warns if it is called from Lisp; Lisp
1761 callers should use delete-char with a negative argument instead.
1763 *** The option `mouse-region-delete-keys' has been deleted.
1765 ** Selection changes.
1767 The default handling of clipboard and primary selections has been
1768 changed to conform with modern X applications. In short, most
1769 commands for killing and yanking text now use the clipboard, while
1770 mouse commands use the primary selection.
1772 In the following, we provide a list of these changes, followed by a
1773 list of steps to get the old behavior back if you prefer that.
1775 *** `select-active-regions' now defaults to t.
1776 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
1777 the kill ring. The selected text is put in the primary selection, if
1778 the system possesses a separate primary selection facility (e.g. X).
1780 **** `select-active-regions' also accepts a new value, `only'.
1781 This means to only set the primary selection for temporarily active
1782 regions (usually made by mouse-dragging or shift-selection);
1783 "ordinary" active regions, such as those made with C-SPC followed by
1784 point motion, do not alter the primary selection.
1786 **** `mouse-drag-copy-region' now defaults to nil.
1788 *** mouse-2 is now bound to `mouse-yank-primary'.
1789 This pastes from the primary selection, ignoring the kill-ring.
1790 Previously, mouse-2 was bound to `mouse-yank-at-click'.
1792 *** `x-select-enable-clipboard' now defaults to t on all platforms.
1794 *** `x-select-enable-primary' now defaults to nil.
1795 Thus, commands that kill text or copy it to the kill-ring (such as
1796 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
1798 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
1799 exactly equivalent to M-w, C-w, and C-y respectively.
1801 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
1802 non-nil by default, as Windows does not support the primary selection
1803 between applications.
1805 *** To return to the previous behavior, do the following:
1807 **** Change `select-active-regions' to nil.
1808 **** Change `mouse-drag-copy-region' to t.
1809 **** Change `x-select-enable-primary' to t (on X only).
1810 **** Change `x-select-enable-clipboard' to nil.
1811 **** Bind `mouse-yank-at-click' to mouse-2.
1813 *** Support for X cut buffers has been removed.
1815 *** X clipboard managers are now supported.
1816 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
1818 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
1819 in the current rectangle. With a prefix argument, this prompts for a
1820 number to count from and for a format string.
1822 ** `redisplay-dont-pause' now defaults to t.
1823 This makes Emacs feel more responsive to editing commands that arrive
1824 at high rate, e.g. if you lean on some key, because stopping redisplay
1825 in the middle (when this variable is nil) forces more expensive
1826 updates later on, and Emacs appears to be unable to keep up.
1828 ** The behavior of <TAB> for active regions in Text mode has changed.
1829 In Text and related modes, typing <TAB> (`indent-for-tab-command')
1830 when the region is active causes Emacs to indent all the lines in the
1831 region, aligning them with the line previous to the first line in the
1832 region (or with the left margin if there is no previous line).
1834 ** When `occur' is called with a prefix argument, matching strings are
1835 collected into the `*Occur*' buffer without line numbers. If there
1836 are parenthesized subexpressions in the specified regexp, `occur'
1837 reads replacement text that may contain \\& and \\N whose convention
1838 follows `replace-match'.
1841 * Changes in Specialized Modes and Packages in Emacs 24.1
1843 ** Archive Mode has basic support for browsing and updating 7z archives.
1847 *** BibTeX mode now supports biblatex.
1848 Use the variable `bibtex-dialect' to select different BibTeX dialects.
1849 `bibtex-entry-field-alist' is now an obsolete alias for
1850 `bibtex-BibTeX-entry-alist'.
1852 *** New command `bibtex-search-entries', bound to C-c C-a.
1854 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
1856 *** New variable `bibtex-search-entry-globally'.
1860 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
1862 *** The default browser used by the package is now the "xdg-open" program,
1863 on platforms that support it. This calls your desktop's preferred browser.
1867 *** Support for musical notes.
1869 *** Support for logarithmic units.
1871 *** No longer uses the tex prefix for TeX specific unit names when
1872 using TeX or LaTeX mode.
1874 *** New option to highlight selections using faces.
1876 *** `calc-histogram' has the option of using a vector to determine the bins.
1878 *** New "O" option prefix.
1880 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
1882 ** Calendar, Diary, and Appt
1884 *** Diary entries can contain non-printing "comments".
1885 See the variable `diary-comment-start'.
1887 *** Appointments can specify their individual warning times.
1888 See the variable `appt-warning-time-regexp'.
1890 *** The function specified by `appt-disp-window-function' may be passed
1891 lists of arguments if multiple appointments are due at similar times.
1892 If you are using a custom function for this, you should update it.
1894 *** New function `diary-hebrew-birthday'.
1896 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
1897 may no longer be nil, but must all be strings.
1899 *** The obsolete (since Emacs 22.1) method of enabling the appt
1900 package by adding `appt-make-list' to `diary-hook' has been removed.
1901 Use `appt-activate' instead.
1903 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
1904 appt-issue-message (use the function appt-activate)
1905 appt-visible/appt-msg-window (use the variable appt-display-format)
1907 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
1908 view-diary-entries, list-diary-entries, show-all-diary-entries
1912 *** New feature to "guess" the style in an existing buffer.
1913 The main entry point is M-x c-guess.
1915 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
1917 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
1918 Thus C-M-a will, by default, go to the beginning of the immediate function,
1921 *** "Macros with semicolons" can be registered for correct indentation.
1922 Where such a macro ends a line (no semicolon) the next statement is no longer
1923 parsed as a statement continuation.
1925 ** Comint and modes derived from it use the standard completion code.
1929 *** Compilation mode can be used without Font Lock mode.
1930 `compilation-parse-errors-function' is now obsolete.
1932 *** New variable `compilation-filter-start', which is bound while
1933 `compilation-filter-hook' runs. It records the start position of the
1934 text inserted by `compilation-filter'.
1936 *** `compilation-error-screen-columns' and `compilation-first-column'
1937 are obeyed in the editing buffer. So programming language modes can
1938 set them, whereas previously only the value in the *Compilation*
1943 *** Customize buffers now contain a search field.
1944 The search is performed using `customize-apropos'.
1945 To turn off the search field, set `custom-search-field' to nil.
1947 *** Options in customize group buffers start out hidden if not customized.
1948 Use the arrow to the left of the option name to toggle visibility.
1950 *** custom-buffer-sort-alphabetically now defaults to t.
1952 *** The color widget now has a "Choose" button, which allows you to
1953 choose a color via `list-colors-display'.
1957 *** It is now possible to access buses other than the default system
1960 *** The `dbus-register-method' and `dbus-register-property' functions
1961 optionally do not register names.
1963 *** The new function `dbus-register-service' registers a known service
1964 name on a D-Bus without also registering a property or a method.
1968 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
1969 if called with a prefix argument, read a file name from the minibuffer
1970 instead of using the current buffer.
1972 *** The "dired local variables" feature of Dired-x is obsolete.
1973 The standard directory local variables feature replaces it.
1977 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
1978 controlling attempts to autojoin a channel.
1980 *** New variable `erc-coding-system-precedence': If we use `undecided'
1981 as the server coding system, this variable will then be consulted.
1982 The default is to decode strings that can be decoded as utf-8 as
1983 utf-8, and do the normal `undecided' decoding for the rest.
1987 *** The default value of `eshell-directory-name' has changed
1988 to be an "eshell" directory in `user-emacs-directory'.
1989 The old "~/.eshell/" directory is still used if it exists, though.
1993 *** The M-x gdb command now uses the GDB Machine Interface protocol.
1994 It now supports multithread non-stop debugging and simultaneous
1995 debugging of several threads.
1999 *** RET (`image-toggle-animation') toggles animation, if applicable.
2000 Animation plays once, unless the option `image-animate-loop' is non-nil.
2004 *** New command M-x info-display-manual displays a named Info manual.
2005 If that manual is already visited in some Info buffer, it displays
2006 that buffer. (This is handy if you have many manuals in many *info*
2007 buffers, and don't remember the name of the buffer visiting the manual
2008 you want to consult.) Otherwise, it loads and displays the manual.
2010 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2011 This is for compatibility with the stand-alone Info reader program,
2012 and also because `Info-edit' is a rarely used command that is disabled
2015 ** Mail mode changes (not Message mode)
2017 *** New command M-x mail-add-attachment for adding MIME attachments
2019 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2020 (Its name is misleading, since it has nothing to do with MIME
2021 attachments.) The old name is now an obsolete alias to the new name.
2023 ** MH-E has been updated to MH-E version 8.3.1.
2024 See MH-E-NEWS for details.
2026 ** Modula-2 mode provides auto-indentation.
2028 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2030 ** nXML mode no longer binds C-RET to `nxml-complete'.
2031 Completion is now performed via `completion-at-point', bound to C-M-i
2032 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2033 default), this performs tag completion.
2035 ** Org mode has been updated to version 7.8.09.
2036 See ORG-NEWS for details.
2038 ** Prolog mode has been completely revamped, with lots of additional
2039 functionality such as more intelligent indentation, electricity,
2040 support for more variants, including Mercury, and a lot more.
2044 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2045 in the Rmail incoming message.
2047 *** The variable `rmail-message-filter' no longer has any effect.
2048 This change was made in Emacs 23.1 but was not advertised at the time.
2049 Try using `rmail-show-message-hook' instead.
2053 *** M-x shell prompts for the shell path name if the default directory
2054 is a remote file name and neither the environment variable $ESHELL nor
2055 the variable `explicit-shell-file-name' is set.
2057 *** TAB is now bound to the standard `completion-at-point' command,
2058 which now implements the pcomplete rules for shell command completion.
2062 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2063 if the mail server supports them. This uses either built-in GnuTLS
2064 support, or the starttls.el library. Customize `smtpmail-stream-type'
2067 *** The variable `smtpmail-auth-credentials' has been removed.
2068 By default, the information is now stored in the file ~/.authinfo.
2069 This was the default value of smtpmail-auth-credentials. If you had
2070 customized smtpmail-auth-credentials to a list of user names and
2071 passwords, those settings are not used. During your first connection
2072 to the smtp server, Emacs will prompt for the user name and password,
2073 and offer to save them to ~/.authinfo. Or you can manually copy the
2074 credentials to ~/.authinfo. For example, if you had
2076 (setq smtpmail-auth-credentials
2077 '(("mail.example.org" 25 "jim" "s!cret")))
2079 then the equivalent line in ~/.authinfo would be
2081 machine mail.example.org port 25 login jim password s!cret
2083 See the auth-source manual for more information, e.g. on encrypting
2084 the credentials file.
2086 *** The variable `smtpmail-starttls-credentials' has been removed.
2087 If you had that set, you need to put
2089 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2091 in your ~/.authinfo file instead.
2093 *** SMTPmail defaults to using the address in the From: header as the
2094 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2095 to the address you wish to use instead.
2099 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2100 and `sql-oracle-scan-on'.
2102 *** New options controlling prompting for login parameters.
2103 Each supported product has a custom variable `sql-*-login-params',
2104 which is a list of the parameters to be prompted for before a
2105 connection is established.
2107 *** The command `sql-product-interactive' now takes a prefix argument,
2108 which causes it to prompt for an SQL product.
2110 *** Product-specific SQL interactive commands now take prefix arguments.
2111 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2112 given a prefix argument, prompt for a name for the SQL interactive
2113 buffer. This reduces the need for calling `sql-rename-buffer'.
2115 *** SQL interactive modes suppress command continuation prompts, and
2116 replace tabs with spaces. The first change impacts multiple line SQL
2117 statements entered with C-j between each line, statements yanked into
2118 the buffer and statements sent with `sql-send-*' functions. The
2119 second prevents the MySQL and Postgres interpreters from listing
2120 object name completions when sent text via `sql-send-*' functions.
2122 *** New command `sql-connect' starts a predefined SQLi session,
2123 using the login parameters from `sql-connection-alist'.
2125 *** New "Save Connection" menu item in SQLi buffers.
2126 This gathers the login params specified for the SQLi session, if it
2127 was not started by a connection, and saves them as a new connection.
2129 *** New commands for listing database objects and details:
2130 sql-list-all and sql-list-table.
2132 *** An API for manipulating SQL product definitions has been added.
2136 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2140 *** New inline access method "ksu" (kerberized su).
2142 *** The following access methods are discontinued: "ssh1_old",
2143 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2145 *** The user option `remote-file-name-inhibit-cache' controls whether
2146 remote file attributes are cached for better performance.
2148 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2149 default value to "".
2151 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2152 for remote machines which support SELinux.
2154 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2155 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2156 the degree of parallelism.
2158 ** VC and related modes
2160 *** Support for pulling on distributed version control systems.
2161 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2162 supported (currently with Bzr, Git, and Mercurial), to update the
2163 current branch and working tree. A prefix argument means to prompt
2164 the user for specifics, e.g. a pull location.
2166 *** `vc-update' is now an alias for `vc-pull'.
2168 *** Support for merging on distributed version control systems.
2169 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2170 is supported (currently with Bzr, Git, and Mercurial), to merge
2171 changes from another branch into the current one. It prompts for
2172 specifics, e.g. a merge source.
2174 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2175 shows a diff while querying the user. It defaults to t.
2177 *** Log entries in some Log View buffers can be toggled to display a
2178 longer description by typing RET (log-view-toggle-entry-display).
2179 This is currently supported for Bzr, Git, and Mercurial (to support
2180 another backend, define a `log-view-expanded-log-entry-function').
2181 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2182 use this to display the full log entry for the revision at point.
2184 *** New command `vc-ediff' allows visual comparison of two revisions
2185 of a file similar to `vc-diff', but using ediff backend.
2187 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2188 this was not advertised at the time.
2190 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2191 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2192 this was not advertised at the time.
2198 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2200 *** partial-completion-mode (complete.el) is obsolete.
2201 You can get a comparable behavior with:
2202 (setq completion-styles '(partial-completion initials))
2203 (setq completion-pcm-complete-word-inserts-delimiters t)
2205 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2207 *** pgg is obsolete (use EasyPG instead).
2209 *** sregex.el is obsolete, since rx.el is a strict superset.
2211 *** s-region.el and pc-select.el are obsolete.
2212 They are superseded by shift-select-mode, enabled by default since 23.1.
2214 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2218 *** The Landmark game is now invoked with `landmark', not `lm'.
2219 Its functions and variables have been similarly renamed.
2221 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2222 (This interfered with cua-mode.)
2224 *** f90.el has some support for Fortran 2008 syntax.
2226 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2228 *** New command `nato-region' converts text to NATO phonetic alphabet.
2231 * New Modes and Packages in Emacs 24.1
2233 ** Occur Edit mode applies edits made in *Occur* buffers to the
2234 original buffers. It is bound to "e" in Occur mode.
2236 ** New global minor mode electric-pair-mode.
2237 When enabled, typing an open parenthesis automatically inserts the
2238 matching closing one.
2240 ** New global minor mode electric-indent-mode.
2241 When enabled, typing certain characters triggers reindentation.
2242 Major modes wishing to use this can set electric-indent-chars or
2243 electric-indent-functions.
2245 ** New global minor mode electric-layout-mode.
2246 When enabled, typing certain characters automatically inserts newlines.
2247 Major modes wishing to use this can set electric-layout-rules.
2249 ** tabulated-list.el provides a generic major mode for tabulated data,
2250 from which other modes can be derived.
2252 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2254 ** secrets.el is an implementation of the Secret Service API, an
2255 interface to password managers like GNOME Keyring or KDE Wallet. The
2256 Secret Service API requires D-Bus for communication. The command
2257 `secrets-show-secrets' offers a buffer with a visualization of the
2260 ** notifications.el provides an implementation of the Desktop
2261 Notifications API. It requires D-Bus for communication.
2263 ** soap-client.el supports access to SOAP web services from Emacs.
2264 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2266 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
2268 ** New emacs-lock.el package.
2269 The previous version has been moved to obsolete/old-emacs-lock.el.
2270 Now, there is a proper minor mode `emacs-lock-mode'. Protection
2271 against exiting Emacs and killing the buffer can be set separately.
2272 The mechanism for automatically turning off protection for buffers
2273 with dead inferior processes has been generalized.
2276 * Incompatible Lisp Changes in Emacs 24.1
2278 ** Passing a nil argument to a minor mode function call now ENABLES
2279 the minor mode unconditionally. This is so that you can write e.g.
2281 (add-hook 'text-mode-hook 'foo-mode)
2283 to enable foo-mode in Text mode buffers, removing the need for
2284 `turn-on-foo-mode' style functions. This affects all mode commands
2285 defined by `define-minor-mode'. If called interactively, the mode
2286 command still toggles the minor mode.
2288 ** The return value of `backup-buffer' has changed.
2289 It is now a list of three elements, where the second element is a list
2290 describing the original file's SELinux context. If Emacs or the
2291 system lacks SELinux support, the context list is (nil nil nil nil).
2292 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
2294 ** `char-direction-table' and the `char-direction' function were deleted.
2295 They were buggy and inferior to the new support of bidirectional
2296 editing introduced in Emacs 24. If you need the bidirectional
2297 properties of a character, use `get-char-code-property' with the last
2298 argument `bidi-class'.
2300 ** `copy-directory' now copies the source directory as a subdirectory
2301 of the target directory, if the latter is an existing directory. The
2302 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2303 the contents directly into a pre-existing target directory.
2305 ** For mouse click input events in the text area, the Y pixel
2306 coordinate in the POSITION list now counts from the top of the text
2307 area, excluding any header line. Previously, it counted from the top
2310 ** Support for "old-style" backquotes, obsolete for 10+ years, has
2311 been further reduced. Now a backquote not followed by a space is
2312 always treated as a "new-style" backquote. Please remove all
2313 "old-style" backquotes from your code. If your code uses backquotes
2314 as documented in the Elisp manual, and compiles without warning, then
2315 you have nothing to do in this regard. Code not following the
2316 appropriate conventions may fail to compile.
2318 The most common cause of trouble seems to be an old-style backquote
2319 followed by a newline. Another cause of trouble is vector notation
2320 for key sequence notation: instead of [(control ,)] and [(control ')],
2321 you should write [(control ?,)] and [(control ?')], which will work in
2324 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2325 was not advertised at the time. The function `custom-initialize-delay'
2326 replaced all known uses.
2328 ** `view-buffer' now treats special mode-class in the same way that
2329 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2330 major mode is special).
2332 ** Menu and tool bar changes
2334 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
2335 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2336 With these alist entries omitted, `make-frame' checks the value of the
2337 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2338 a menu-bar or tool-bar, respectively. If the alist entries are added,
2339 they override the value of `menu-bar-mode'/`tool-bar-mode'.
2341 *** The menu bar bindings's caches are not used any more.
2342 Use (where-is-internal <def> nil t) instead.
2344 ** Regions created by mouse dragging are now normal active regions,
2345 similar to those created by shift-selection (see Selection changes
2346 above). In previous Emacs versions, these regions were delineated by
2347 `mouse-drag-overlay'; that variable has been removed.
2349 ** The fourth argument of `filter-buffer-substring' has been removed.
2350 If you want to remove text properties from the final result, simply
2351 pass the result through substring-no-properties.
2353 ** cl.el no longer provides `cl-19'.
2355 ** The following obsolete functions and aliases have been removed
2356 (the appropriate new function is given in parentheses; "not needed"
2357 means you can just remove all calls to the function in question):
2359 *** `comint-kill-output' (`comint-delete-output')
2360 *** `decompose-composite-char' (`char-to-string')
2361 *** `outline-visible' (`outline-invisible-p')
2362 *** `internal-find-face' (`facep')
2363 *** `internal-get-face' (`facep and check-face')
2364 *** `frame-update-faces' (not needed)
2365 *** `frame-update-face-colors' (`frame-set-background-mode')
2366 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2367 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2368 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2369 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2370 *** `x-make-font-unbold' (`make-face-unbold')
2371 *** `x-make-font-unitalic' (`make-face-unitalic')
2372 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2373 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2374 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2375 *** `char-bytes' (== 1)
2376 *** `isearch-return-char' (`isearch-printing-char')
2377 *** `make-local-hook' (not needed)
2378 *** `set-screen-height' (`set-frame-height')
2379 *** `set-screen-width' (`set-frame-width')
2381 ** The following obsolete variables and varaliases have been removed
2382 (the appropriate new variable is given in parentheses):
2384 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2385 *** `vc-header-alist' (`vc-BACKEND-header')
2386 *** `directory-sep-char' (== ?/)
2387 *** `font-lock-defaults-alist' (`font-lock-defaults')
2388 *** `e' (`float-e').
2390 ** The following obsolete files were removed:
2391 sc.el, x-menu.el, rnews.el, rnewspost.el
2393 ** The format of the finder-inf.el file has changed, since the Finder
2394 mechanism is now based on the package system. The variable
2395 `finder-package-info' is replaced by `package--builtins' and
2396 `finder-keywords-hash'.
2398 ** When generating autoloads, `update-directory-autoloads' no longer
2399 assumes every inspected file is in your `load-path'. It instead
2400 generates relative names according to the current `load-path'.
2403 * Lisp Changes in Emacs 24.1
2405 ** Code can now use lexical scoping by default instead of dynamic scoping.
2406 The `lexical-binding' variable enables lexical scoping for local
2407 variables. It is typically set via a file-local variable in the first
2408 line of the file, in which case it applies to all the code in that
2411 *** `eval' takes a new optional argument `lexical' to choose the new lexical
2412 binding instead of the old dynamic binding mode.
2414 *** Lexically scoped interpreted functions are represented with a new form
2415 of function value which looks like (closure ENV ARGS &rest BODY).
2417 *** New macro `letrec' to define recursive local functions.
2419 *** `defvar' and `defconst' now mark the variable as special (dynamic).
2420 So do `defcustom' and other forms that call `defvar' as a subroutine.
2422 *** New function `special-variable-p' to check whether a variable is
2423 declared as dynamically bound.
2425 *** The form ((lambda ...) ...) is deprecated.
2427 ** An Emacs Lisp testing tool is now included.
2428 Emacs Lisp developers can use this tool to write automated tests for
2429 their code. See the ERT info manual for details.
2431 ** Changes for bidirectional display and editing
2433 *** New function `current-bidi-paragraph-direction'.
2434 This returns the base direction of the paragraph at point.
2436 *** New function `bidi-string-mark-left-to-right'.
2437 Given a string containing characters from right-to-left scripts, this
2438 function returns another string which can be safely inserted into a
2439 buffer, such that any following text will be always displayed to the
2440 right of that string. (This works by appending an invisible Unicode
2441 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
2443 This is useful when the buffer has overall left-to-right paragraph
2444 direction and you need to insert a string whose contents are not known
2445 in advance, without disrupting the layout of the line.
2449 *** Window tree functions are accessible in Elisp.
2450 Functions are provided to return the parent, siblings or child windows
2451 of any window including internal windows (windows not associated with a
2452 buffer) in the window tree.
2454 **** New function `window-valid-p' gives non-nil for live and internal
2457 **** Window manipulation can deal with internal windows.
2458 Many window handling functions like `split-window', `delete-window', or
2459 `delete-other-windows' as well as the window resizing functions can now
2460 act on any window including internal ones.
2462 *** window-total-height/-width vs window-body-height/-width.
2463 The function `window-height' has been renamed to `window-total-height'
2464 and `window-width' has been renamed to `window-body-width'. The old
2465 names are provided as aliases. Two new functions `window-total-width'
2466 and `window-body-height' are provided.
2468 *** Window parameters specific to window handling functions.
2469 For each window you can specify a parameter to override the default
2470 behavior of a number of functions like `split-window', `delete-window'
2471 and `delete-other-windows'. The variable `ignore-window-parameters'
2472 allows to ignore processing such parameters.
2474 *** New semantics of third argument of `split-window'.
2475 The third argument of `split-window' has been renamed to SIDE and can be
2476 set to any of the values 'below, 'right, 'above, or 'left to make the
2477 new window appear on the corresponding side of the window that shall be
2478 split. Any other value of SIDE will cause `split-window' to split the
2479 window into two side-by-side windows as before.
2481 *** Window resizing functions.
2482 A new standard function for resizing windows called `window-resize' has
2483 been introduced. This and all other functions for resizing windows no
2484 longer delete any windows when they become too small.
2486 *** Deleting the selected window now selects the most recently selected
2487 live window on that frame instead.
2489 *** `adjust-window-trailing-edge' adjustments.
2490 `adjust-window-trailing-edge' can now deal with fixed-size windows and
2491 is able to resize other windows if a window adjacent to the trailing
2492 edge cannot be shrunk any more. This makes its behavior more similar to
2493 that of Emacs 21 without compromising, however, its inability to delete
2494 windows which was introduced in Emacs 22.
2496 *** Window-local buffer lists.
2497 Windows now have local buffer lists. This means that removing a buffer
2498 from display in a window will preferably show the buffer previously
2499 shown in that window with its previous window-start and window-point
2500 positions. This also means that the same buffer may be automatically
2501 shown twice even if it already appears in another window.
2503 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2504 which if non-nil requires the buffer to be displayed in the currently
2505 selected window, signaling an error otherwise. If nil, another window
2506 can be used, e.g. if the selected one is strongly dedicated.
2508 *** `split-window-vertically' and `split-window-horizontally' renamed
2509 to `split-window-below' and `split-window-right' respectively.
2510 The old names are kept as aliases.
2514 **** The second arg to `display-buffer' and `pop-to-buffer' is now
2515 named ACTION, and takes a display action of the same form as
2516 `display-buffer-base-action' (see Changes, above). A non-nil,
2517 non-list value is treated specially, as the old meaning.
2519 **** New variable `display-buffer-overriding-action'.
2521 **** The procedure of `display-buffer' etc. to choose a window is
2522 determined by combining `display-buffer-overriding-action',
2523 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2524 and `display-buffer-fallback-action'. The second and fourth of these
2525 are user-customizable variables.
2527 See the docstring of `display-buffer' for details.
2529 *** New functions `window-state-get' and `window-state-put'.
2530 These functions allow to save and restore the state of an arbitrary
2531 frame or window as an Elisp object.
2535 *** New variable `completion-extra-properties' used to specify extra
2536 properties of the current completion:
2537 - :annotate-function, same as the old completion-annotate-function.
2538 - :exit-function, function to call after completion took place.
2540 *** Functions on `completion-at-point-functions' can return any of the
2541 properties valid for `completion-extra-properties'.
2543 *** `completion-annotate-function' is obsolete.
2545 *** New `metadata' method for completion tables. The metadata thus returned
2546 can specify various details of the data returned by `all-completions':
2547 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
2548 used to select a style in completion-category-overrides.
2549 - `annotation-function' to add annotations in *Completions*.
2550 - `display-sort-function' to specify how to sort entries in *Completions*.
2551 - `cycle-sort-function' to specify how to sort entries when cycling.
2553 *** `minibuffer-local-filename-must-match-map' is not used any more.
2554 Instead, the bindings in `minibuffer-local-filename-completion-map'
2555 are combined with `minibuffer-local-must-match-map'.
2557 *** New variable `completing-read-function' allows overriding the
2558 behavior of `completing-read'.
2560 ** `glyphless-char-display' can now distinguish between graphical and
2561 text terminal display, via a char-table entry that is a cons cell.
2563 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
2564 Instead, the offending function is removed.
2568 *** New function `run-hook-wrapped' for running an abnormal hook by
2569 passing the hook functions as arguments to a "wrapping" function.
2570 Like `run-hook-with-args-until-success', it stops at the first
2571 non-nil return value.
2573 *** New macro `with-wrapper-hook' for running an abnormal hook as a
2574 set of "wrapping" filters, similar to around advice.
2575 (A version of this macro was actually added in Emacs 23.2 but was not
2576 advertised at the time.)
2580 *** New macro `condition-case-unless-debug' (this was actually added in
2581 Emacs 23.1 as condition-case-no-debug, but not advertised)
2583 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
2585 *** Variable `stack-trace-on-error' removed.
2587 *** The debugger can now "continue" from an error, which means it will
2588 jump to the error handler as if the debugger had not been invoked
2589 instead of jumping all the way to the top-level.
2591 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
2592 This can be useful when `inhibit-quit' is set.
2594 ** The new function `server-eval-at' allows evaluation of Lisp forms on
2595 named Emacs server instances.
2597 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
2598 to redirect STDOUT to a file.
2600 ** The function `format-time-string' now supports the %N directive,
2601 for higher-resolution time stamps.
2603 ** New input reading functions
2605 *** New function `read-char-choice' reads a restricted set of
2606 characters, discarding any inputs not inside the set.
2608 *** The command `read-color' now requires a match for a color name
2609 or RGB triplet, instead of signaling an error if the user provides
2612 **** `facemenu-read-color' is now an alias for `read-color'.
2614 ** `image-library-alist' is renamed to `dynamic-library-alist'.
2615 The variable is now used to load all kind of supported dynamic libraries,
2616 not just image libraries. The previous name is still available as an
2619 ** Syntax parsing changes
2621 *** New variable `syntax-propertize-function'.
2622 This replaces `font-lock-syntactic-keywords' which is now obsolete.
2623 This allows syntax-table properties to be set independently from font-lock:
2624 just call syntax-propertize to make sure the text is propertized.
2625 Together with this new variable come a new hook
2626 syntax-propertize-extend-region-functions, as well as two helper functions:
2627 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
2628 as-is; and syntax-propertize-rules which provides a new way to specify
2631 *** Syntax tables support a new "comment style c" additionally to style b.
2633 ** New hook `post-self-insert-hook', run after `self-insert-command'.
2635 ** frame-local variables cannot be let-bound any more.
2637 ** Major and minor mode changes
2639 *** `set-auto-mode' now respects mode: local variables at the end of files,
2640 as well as those in the -*- line.
2642 *** `prog-mode' is a new major mode from which programming modes
2645 **** `prog-mode-hook' can be used to enable features for programming
2646 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
2647 on-the-fly spell checking for comments and strings.
2649 *** New hook `change-major-mode-after-body-hook', run by
2650 `run-mode-hooks' just before any other mode hooks.
2652 *** Enabled globalized minor modes can be disabled in specific major modes.
2653 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
2654 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
2656 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
2658 ** File-handling changes
2660 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
2661 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
2662 both non-nil. Interactively, TRASH defaults to t, unless a prefix
2663 argument is supplied (see Trash changes, above).
2665 *** New file predicates: `file-equal-p', `file-in-directory-p'.
2667 ** Tool-bars can display separators.
2668 Tool-bar separators are handled like menu separators in menu-bar maps,
2669 i.e. via menu entries of the form `(menu-item "--")'.
2673 *** Animated images support (currently animated gifs only).
2675 **** `image-animated-p' returns non-nil if an image can be animated.
2677 **** `image-animate' animates a supplied image spec.
2679 **** `image-animate-timer' returns the timer object for an image that
2682 *** `image-extension-data' has been renamed to `image-metadata'.
2683 The old name is an obsolete alias to the new one.
2685 *** Image mode can view any image type that ImageMagick supports.
2686 This requires Emacs to be built with ImageMagick support.
2688 **** New function `imagemagick-types', defined if ImageMagick support
2689 is enabled, returns a list of image file extensions that your
2690 ImageMagick installation supports.
2692 **** New function `imagemagick-register-types' enables ImageMagick
2693 image types in Image mode and in `create-image' and other helper
2696 **** New option `imagemagick-types-inhibit' excludes certain
2697 ImageMagick image types from `imagemagick-register-types'.
2699 **** With ImageMagick support, there are extra Image mode commands to
2700 resize and rotate images: `image-transform-fit-to-height',
2701 `image-transform-fit-to-width', `image-transform-set-rotation', and
2702 `image-transform-set-scale'.
2704 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
2705 passes it to the mail user agent function. This argument specifies an
2706 action for returning to the caller after finishing with the mail. For
2707 example, this is used by Rmail to optionally delete a mail window.
2709 ** XML and HTML parsing
2710 If Emacs is compiled with libxml2 support, there are two new
2711 functions: `libxml-parse-html-region' (which parses "real world" HTML)
2712 and `libxml-parse-xml-region' (which parses XML). Both return an
2713 Emacs Lisp parse tree.
2715 ** Networking and encryption changes
2717 *** `open-network-stream' can now be used to open an encrypted stream.
2718 It now accepts an optional `:type' parameter for initiating a TLS
2719 connection, directly or via STARTTLS. To do STARTTLS, additional
2720 parameters (`:end-of-command', `:success', `:capabilities-command')
2721 must also be supplied.
2723 *** New library gnutls.el.
2724 The new function `gnutls-available-p' returns non-nil if Emacs is
2725 built with GnuTLS support. The main entry points are
2726 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
2727 these functions through `open-network-stream', because that can
2728 upgrade connections through STARTTLS opportunistically or use plain
2729 SSL, depending on your needs. For debugging, set `gnutls-log-level'
2732 *** New primitive `secure-hash' that supports many secure hash algorithms:
2733 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
2734 sha1.el has been removed. The `sha1' feature is provided by default.
2738 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
2740 ** Progress reporters can now "spin".
2741 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
2742 now be nil, or omitted. This makes a "non-numeric" reporter. Each
2743 time you call `progress-reporter-update' on that progress reporter,
2744 with a nil or omitted VALUE argument, the reporter message is
2745 displayed with a "spinning bar".
2747 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
2748 being reverted, even if the buffer has a local `revert-buffer-function'.
2750 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
2751 If delayed-warnings-list is non-nil, the command loop calls
2752 `delayed-warnings-hook' after `post-command-hook'. At present, this
2753 is only used by Emacs on some platforms to display warnings during
2754 startup, which might otherwise not be noticed. This uses the
2755 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
2757 ** rx.el has a new `group-n' construct for explicitly numbered groups.
2759 ** New function `make-composed-keymap' that constructs a new keymap
2760 from multiple input maps. You can use this to make a keymap that
2761 inherits from multiple maps, eg:
2762 (set-keymap-parent newmap (make-composed-keymap othermap parent))
2764 ** New function `string-prefix-p'.
2765 (This was actually added in Emacs 23.2 but was not advertised at the time.)
2767 ** New reader macro ## that stands for the empty symbol.
2768 This means that the empty symbol can now be read back. Also, #: by itself
2769 (when not immediately followed by a possible symbol character) stands for
2770 an empty uninterned symbol.
2772 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
2774 ** The following functions and variables are obsolete:
2776 *** `tooltip-use-echo-area' is obsolete.
2777 Rather than setting this to t, disable Tooltip mode instead.
2779 *** buffer-substring-filters is obsolete.
2780 Use `filter-buffer-substring-functions' instead.
2782 *** `byte-compile-disable-print-circle' is obsolete.
2784 *** `deferred-action-list' and `deferred-action-function' are obsolete.
2785 Use `post-command-hook' instead.
2787 *** `font-lock-maximum-size' is obsolete.
2790 * Changes in Emacs 24.1 on Non-Free Operating Systems
2792 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
2793 and also when HOME is set to C:\ by default.
2795 ** New configure.bat options
2797 *** --enable-checking builds Emacs with extra runtime checks.
2799 *** --distfiles specifies files to be included in binary distribution.
2801 *** --without-gnutls disables automatic GnuTLS detection.
2803 *** --lib for general library linkage, works with the USER_LIBS build variable.
2805 ** New make target `dist' to create binary distribution for MS Windows.
2807 ** The Lisp function `w32-default-color-map' is now obsolete.
2808 (It is only used internally in the Emacs C code.)
2810 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
2811 reappear on mouse-over. (Requires OS X 10.6 or later.)
2813 ** On Mac OS X, dragging a file into Emacs visits the file, like on
2814 other platforms, rather than inserting its contents into the buffer.
2817 ----------------------------------------------------------------------
2818 This file is part of GNU Emacs.
2820 GNU Emacs is free software: you can redistribute it and/or modify
2821 it under the terms of the GNU General Public License as published by
2822 the Free Software Foundation, either version 3 of the License, or
2823 (at your option) any later version.
2825 GNU Emacs is distributed in the hope that it will be useful,
2826 but WITHOUT ANY WARRANTY; without even the implied warranty of
2827 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2828 GNU General Public License for more details.
2830 You should have received a copy of the GNU General Public License
2831 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2836 paragraph-separate: "[
\f]*$"