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 ** `split-window' is no longer a command, just a non-interactive function.
80 As a command it was a special case of `split-window-below', and as such
81 superfluous. After being reimplemented in Lisp, its interactive form
82 was mistakenly retained.
84 ** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
85 bound to <f11> and M-<f10>, respectively.
87 ** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
90 ** New command `kmacro-to-register' to store keyboard macros in registers.
94 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
95 You can pick the name of the function and the variables with `C-x 4 a'.
98 * Changes in Specialized Modes and Packages in Emacs 24.4
100 ** `ido-decorations' has been slightly extended to give a bit more control.
102 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
104 ~/.emacs.d/timelog replaces ~/.timelog
105 ~/.emacs.d/todo-do replaces ~/.todo-do
106 ~/.emacs.d/todo-done replaces ~/.todo-done
107 ~/.emacs.d/todo-top replaces ~/.todo-top
108 ~/.emacs.d/vip replaces ~/.vip
109 ~/.emacs.d/viper replaces ~/.viper
110 ~/.emacs.d/ido.last replaces ~/.ido.last
111 ~/.emacs.d/kkcrc replaces ~/.kkcrc
112 ~/.emacs.d/quickurls replaces ~/.quickurls
113 ~/.emacs.d/idlwave replaces ~/.idlwave
114 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
115 ~/.emacs.d/places replaces ~/.emacs-places
116 ~/.emacs.d/shadows replaces ~/.shadows
117 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
118 ~/.emacs.d/strokes replaces ~/.strokes
119 ~/.emacs.d/notes replaces ~/.notes
120 ~/.emacs.d/type-break replaces ~/.type-break
122 ** Delphi mode is now called OPascal mode.
123 *** All delphi-* variables and functions have been renamed to opascal-*.
124 *** `delphi-newline-always-indents' is not supported any more
125 use `electric-indent-mode' instead.
126 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
128 ** Eldoc Mode works properly in the minibuffer.
130 ** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
132 ** completing-read-multiple's separator can now be a regexp.
133 The default separator is changed to allow surrounding spaces around the comma.
137 *** Battery information via the BSD `apm' utility is now supported.
141 *** New macro cl-tagbody.
144 *** letf is now just an alias for cl-letf.
148 *** Calc by default now uses the Gregorian calendar for all dates, and
149 uses January 1, 1 AD as its day number 1. Previously Calc used the
150 Julian calendar for dates before September 14, 1752, and it used
151 December 31, 1 BC as its day number 1; the new scheme is more
152 consistent with Calendar's calendrical system and day numbering.
154 *** The new variable `calc-gregorian-switch' lets you configure the
155 date when Calc switches from the Julian to the Gregorian calendar.
156 Nil, the default value, means to always use the Gregorian calendar.
157 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
160 *** Support for ISO 8601 dates.
164 *** New minor mode `dired-hide-details-mode' hides details.
168 *** New option `erc-accidental-paste-threshold-seconds'.
169 If set to a number, this can be used to avoid accidentally paste large
170 amounts of data into the ERC input.
172 ** Icomplete is a bit more like IDO.
173 *** key bindings to navigate through and select the completions.
174 *** The icomplete-separator is customizable, and its default has changed.
175 *** Removed icomplete-show-key-bindings.
179 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
180 visit the next image file and the previous image file in the same
181 directory, respectively.
183 *** New commands to show specific frames of multi-frame images.
184 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
185 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
188 *** The command `image-mode-fit-frame' deletes other windows.
189 When toggling, it restores the frame's previous window configuration.
190 It also has an optional frame argument, which can be used by Lisp
191 callers to fit the image to a frame other than the selected frame.
195 *** New face `info-index-match' is used to highlight matches in index
196 entries displayed by `Info-index-next', `Info-virtual-index' and
201 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
202 and adds it to the search string.
204 ** MH-E has been updated to MH-E version 8.5.
205 See MH-E-NEWS for details.
208 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
209 Customize `unrmail-mbox-format' to change this.
212 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
213 of how Rmail displays non-MIME messages.
216 ** New function `ses-rename-cell' to give SES cells arbitrary names.
218 ** trace-function was largely rewritten.
219 New features include:
220 - no prompting for the destination buffer, unless a prefix-arg was used.
221 - additionally to prompting for a destination buffer, when a prefix-arg is
222 used, the user can enter a "context", i.e. Lisp expression whose value at the
223 time the function is entered/exited will be printed along with the function
224 name and arguments. Useful to trace the value of (current-buffer) or
225 (point) when the function is invoked.
227 ** New command `delete-duplicate-lines' has two types of operation:
228 when its arg ADJACENT is non-nil (when called interactively with C-u C-u)
229 it works like the utility `uniq'. Otherwise by default it deletes
230 duplicate lines everywhere in the region without regard to adjacency.
232 ** New `cycle-spacing' command allows cycling between having just one
233 space, no spaces, or reverting to the original spacing. Like
234 `just-one-space' command it can handle or ignore newlines and
235 leave different number of spaces.
240 *** New connection method "adb", which allows to access Android
241 devices by the Android Debug Bridge. The variable `tramp-adb-program'
242 can be used to adapt the path of the "adb" program, if needed.
244 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
245 "scpc" and "rsyncc" are discontinued. The ssh option
246 "ControlMaster=auto" is set automatically in all ssh-based methods,
250 *** Handlers for `file-acl' and `set-file-acl' for remote machines
251 which support POSIX ACLs.
255 *** The commands `woman-default-faces' and `woman-monochrome-faces'
256 are obsolete. Customize the `woman-* faces instead.
260 *** Added Eshell-TRAMP module
261 External su and sudo commands are now the default; the internal,
262 TRAMP-using variants can still be used by enabling the eshell-tramp
265 ** Obsolete packages:
267 *** longlines.el is obsolete; use visual-line-mode instead.
269 *** terminal.el is obsolete; use term.el instead.
272 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
275 *** The Info-edit command is obsolete. Editing Info nodes by hand
276 has not been relevant for some time.
279 * New Modes and Packages in Emacs 24.4
280 ** New `superword-mode' in subword.el
281 `superword-mode' overrides the default word motion commands to treat
282 symbol_words as a single word, similar to what `subword-mode' does and
283 using the same internal functions.
285 ** New nadvice.el package offering lighter-weight advice facilities.
287 - add-function/remove-function which can be used to add/remove code on any
288 function-carrying place, such as process-filters or `<foo>-function' hooks.
289 - advice-add/advice-remove to add/remove a piece of advice on a named function,
290 much like `defadvice' does.
293 * Incompatible Lisp Changes in Emacs 24.4
295 ** `read-event' does not return decoded chars in ttys any more.
296 Just as was the case in Emacs-22 and before, decoding of tty input according to
297 keyboard-coding-system is not performed in read-event any more. But contrary
298 to that past, it is still done before input-decode-map/function-key-map/...
300 ** Removed inhibit-local-menu-bar-menus.
302 ** frame-local variables that affect redisplay do not work any more.
303 More specifically, the redisplay does not bother to check for a frame-local
304 value when looking up variables.
306 ** nil and "unbound" are indistinguishable in symbol-function.
307 `symbol-function' never signals `void-function' any more.
308 `fboundp' returns non-nil if the symbol was `fset' to nil.
310 ** `defadvice' does not honor the `freeze' flag and cannot advise
311 special-forms any more.
313 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
314 VAR was bound to nil which was not tremendously useful and just lead to
315 spurious warnings about an unused var.
317 ** The return value of `backup-buffer' has changed.
318 The second argument is no longer an SELinux context, instead it is an
319 alist of extended attributes as returned by the new function
320 `file-extended-attributes'. The attributes can be applied to another
321 file using `set-file-extended-attributes'.
324 * Lisp Changes in Emacs 24.4
326 ** Obsoleted functions:
328 *** `lisp-complete-symbol'
330 *** `minibuffer-completion-contents'
332 ** `with-wrapper-hook' is obsoleted by `add-function'.
333 The few hooks that used with-wrapper-hook are replaced as follows:
334 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
335 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
336 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
339 ** `get-upcase-table' is obsoleted by the new `case-table-get-table'.
341 ** Support for filesystem notifications.
342 Emacs now supports notifications of filesystem changes, such as
343 creation, modification, and deletion of files. This requires the
344 'inotify' API on GNU/Linux systems. On MS-Windows systems, this is
345 supported for Windows XP and newer versions.
347 ** Changes in autorevert.el
350 *** If Emacs is compiled with file notification support, notifications
351 are used instead of checking the time stamp of the files. You can
352 disable this by setting the user option `auto-revert-use-notify' to
353 nil. Alternatively, a regular expression of directories to be
354 excluded from file notifications can be specified by
355 `auto-revert-notify-exclude-dir-regexp'.
358 *** The new user option `auto-revert-remote-files' enables reversion
359 of remote files when set to non-nil.
363 *** The `face-spec-set' is now analogous to `setq' for face specs.
364 Its third arg now accepts values specifying exactly which face spec to
365 set (defface, custom, or user spec), and it directly sets the relevant
366 property using the supplied face spec.
368 *** Face specs set via Custom themes now replace the `defface' spec
369 rather than inheriting from it (as do face specs set via Customize).
371 *** New face characteristic (supports :underline (:style wave))
372 specifies whether or not the terminal can display a wavy line.
377 *** `image-animated-p' is now `image-multi-frame-p'.
378 It returns non-nil for any image that contains multiple frames,
379 whether or not it specifies a frame delay.
382 *** When animating images that do not specify a frame delay,
383 Emacs uses `image-default-frame-delay'.
386 *** New functions `image-current-frame' and `image-show-frame' for getting
387 and setting the current frame of a multi-frame image.
389 ** time-to-seconds is not obsolete any more.
390 ** New function special-form-p.
391 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
392 text-property on the first char.
394 ** The `defalias-fset-function' property lets you catch calls to defalias
395 and redirect them to your own function instead of `fset'.
397 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
398 When you edit DIR/FILE, Emacs normally creates a symbolic link
399 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
400 is being edited. Formerly, if there was already a non-symlink file
401 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
402 through DIR/.#FILE.9. These fallbacks have been removed, so that
403 Emacs now no longer locks DIR/FILE in that case.
405 On file systems that do not support symbolic links, the lock is now a
406 regular file with contents being what would have been in the symlink.
408 ** The 9th element returned by `file-attributes' is now unspecified.
409 Formerly, it was t if the file's gid would change if file were deleted
410 and recreated. This value has been inaccurate for years on many
411 platforms, and nobody seems to have noticed or cared.
413 ** The function `file-ownership-preserved-p' now has an optional
414 argument GROUP which causes it check for file group too. This can be
415 used in place of the 9th element of `file-attributes'.
417 ** New functions `group-gid' and `group-real-gid'.
419 ** The 6th argument to `copy-file' has been renamed to
420 `preserve-extended-attributes' as it now handles both SELinux context
423 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
425 *** The package descriptor and name of global variables, constants,
426 and functions should be separated by two hypens if the symbol is not
427 meant to be used by other packages.
430 * Changes in Emacs 24.4 on Non-Free Operating Systems
433 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
434 The backtrace is written to the 'emacs_backtrace.txt' file in the
435 directory where Emacs was running.
438 ** The variable `buffer-file-type' is no longer supported.
439 Setting it has no effect, and %t in the mode-line format is ignored.
440 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
441 modifying it has no effect.
444 ** Lock files now work on MS-Windows.
445 This allows to avoid losing your edits if the same file is being
446 edited in another Emacs session or by another user. See the node
447 "Interlocking" in the Emacs User Manual for the details. To disable
448 file locking, customize `create-lockfiles' to nil.
450 ** Improved fullscreen support on Mac OS X.
451 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
452 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
453 native is the default.
456 * Installation Changes in Emacs 24.3
458 ** The default X toolkit is now Gtk+ version 3.
459 If you don't pass `--with-x-toolkit' to configure, or if you use
460 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
461 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
462 You can explicitly require a specific version by passing
463 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
465 ** New configure option `--enable-link-time-optimization', to utilize
466 an appropriate feature provided by GCC since version 4.5.0.
468 ** New configure option `--without-all' to disable most of the optional
469 features (image support, etc.) that are normally enabled by default.
471 ** New configure option `--enable-gcc-warnings' (for developing/debugging
472 Emacs). If building with GCC, this enables compile-time checks that
473 warn/give errors about possibly-questionable C code. On a recent GNU
474 system there should be no warnings; on older and on non-GNU systems
475 the results may be useful to developers.
477 ** The configure option `--enable-use-lisp-union-type' has been
478 renamed to `--enable-check-lisp-object-type', as the resulting
479 Lisp_Object type no longer uses a union to implement the compile time
480 check that this option enables.
482 ** The configure option `--disable-maintainer-mode' has been removed,
483 as it was confusingly-named and rarely useful.
485 ** The configure options `--program-prefix', `--program-suffix', and
486 `--program-transform-name' apply to more than just the installed
487 binaries. Now they also affect the man pages, icons, and the
488 etc/emacs.desktop file; but not the info pages, since this would break
489 links between the various manuals.
491 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
492 overwriting "emacs" in the installation bin/ directory with a link
495 ** Emacs uses libtinfo in preference to libncurses, if available.
497 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
498 /usr/pkg/lib to the linker search path. You must add them yourself if
501 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
502 (from the bin and libexec directories, respectively). The former is
503 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
506 * Startup Changes in Emacs 24.3
508 ** Emacs no longer searches for `leim-list.el' files beneath the standard
509 lisp/ directory. There should not be any there anyway. If you have
510 been adding them there, put them somewhere else; e.g., site-lisp.
512 ** The `--no-site-lisp' command line option now works for Nextstep builds.
515 * Changes in Emacs 24.3
519 *** `C-h f' (`describe-function') can now perform autoloading.
520 When this command is called for an autoloaded function whose docstring
521 contains a key substitution construct, that function's library is
522 automatically loaded, so that the documentation can be shown
523 correctly. To disable this, set `help-enable-auto-load' to nil.
525 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
526 even after their associated libraries have been loaded (and the
527 autoloads have been redefined as functions).
531 *** Images displayed via ImageMagick now support transparency and the
532 :background image specification property.
534 *** When available, ImageMagick support is automatically enabled.
535 It is no longer necessary to call `imagemagick-register-types'
536 explicitly to install ImageMagick image types; that function is called
537 automatically at startup, or when customizing an imagemagick- option.
539 *** Setting `imagemagick-types-inhibit' to t now disables the use of
540 ImageMagick to view images. (You must call `imagemagick-register-types'
541 afterwards if you do not use customize to change this.)
543 *** The new variable `imagemagick-enabled-types' also affects which
544 ImageMagick types are treated as images. The function
545 `imagemagick-filter-types' returns the list of types that will be
550 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
551 next and previous path separator, respectively.
553 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
554 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
555 non-nil before enabling the mode.
559 *** New option `mode-line-default-help-echo' specifies the help text
560 (shown in a tooltip or in the echo area) for any part of the mode line
561 that does not have its own specialized help text.
563 *** You can now click mouse-3 in the coding system indicator to invoke
564 `set-buffer-file-coding-system'.
568 *** emacsclient now obeys string values for `initial-buffer-choice',
569 if it is told to open a new frame without specifying any file to visit
570 or expression to evaluate.
572 *** New option `server-auth-key' specifies a shared server key.
574 ** Emacs now generates backtraces on fatal errors.
575 On encountering a fatal error, Emacs now outputs a textual description
576 of the fatal signal, and a short backtrace on platforms like glibc
577 that support backtraces.
579 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
580 This minor mode replaces `toggle-read-only', which is now obsolete.
582 ** Most `y-or-n' prompts now allow you to scroll the selected window.
583 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
584 respectively, without exiting from the prompt.
586 ** In the Package Menu, newly-available packages are listed as "new",
587 and sorted above the other "available" packages by default.
589 ** If your Emacs was built from a bzr checkout, the new variable
590 `emacs-bzr-version' contains information about the bzr revision used.
592 ** New option `create-lockfiles' specifies usage of lockfiles.
593 It defaults to t. Changing it to nil inhibits the creation of lock
594 files (use this with caution).
596 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
597 variables on remote hosts.
599 ** The entry for PCL-CVS has been removed from the Tools menu.
600 The PCL-CVS commands are still available via the keyboard.
602 ** Using "unibyte: t" in Lisp source files is obsolete.
603 Use "coding: raw-text" instead.
605 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
606 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
607 The previous binding, introduced in Emacs 24.1, was a mistake, because
608 `C-c LETTER' bindings are reserved for user customizations.
610 ** Internationalization
612 *** New language environment: Persian.
614 *** New input method `vietnamese-vni'.
616 ** Nextstep (GNUstep / Mac OS X) port
618 *** Support for fullscreen and the frame parameter fullscreen.
620 *** A file dialog is used for open/save operations initiated from the
624 * Editing Changes in Emacs 24.3
626 ** Search and Replace
628 *** Non-regexp Isearch now performs "lax" space matching.
629 Each sequence of spaces in the supplied search string may match any
630 sequence of one or more whitespace characters, as specified by the
631 variable `search-whitespace-regexp'. (This variable is also used by a
632 similar existing feature for regexp Isearch.)
634 *** New Isearch command `M-s SPC' toggles lax space matching.
635 This applies to both ordinary and regexp Isearch.
637 *** New option `replace-lax-whitespace'.
638 If non-nil, `query-replace' uses flexible whitespace matching too.
641 *** Global `M-s _' starts a symbol (identifier) incremental search,
642 and `M-s _' in Isearch toggles symbol search mode.
643 `M-s c' in Isearch toggles search case-sensitivity.
645 ** Navigation commands
647 *** New binding `M-g c' for `goto-char'.
649 *** New binding `M-g TAB' for `move-to-column'.
651 *** `M-g TAB' (`move-to-column') prompts for a column number if called
652 interactively with no prefix arg. Previously, it moved to column 1.
654 ** New option `yank-handled-properties' allows processing of text
655 properties on yanked text, in ways that are more general than just
656 removing them (as is done by `yank-excluded-properties').
658 ** New option `delete-trailing-lines' specifies whether
659 M-x delete-trailing-whitespace should delete trailing lines at the end
660 of the buffer. It defaults to t.
662 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
664 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
665 `ucs-insert' is now an obsolete alias for `insert-char'.
667 ** The `z' key no longer has a binding in most special modes.
668 It used to be bound to `kill-this-buffer', but `z' is too easy to
671 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
672 It copies the region-rectangle as the last rectangle kill.
676 *** `C-x r +' is now overloaded to invoke `append-to-register'.
678 *** New option `register-separator' specifies the register containing
679 the text to put between collected texts for use with
680 M-x append-to-register and M-x prepend-to-register.
683 * Changes in Specialized Modes and Packages in Emacs 24.3
685 ** Common Lisp emulation (CL)
687 *** CL's main entry is now (require 'cl-lib).
688 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
689 i.e., all its definitions have the "cl-" prefix (and internal definitions
690 use the "cl--" prefix).
692 If `cl' provided a feature under the name `foo', then `cl-lib'
693 provides it under the name `cl-foo' instead; with the exceptions of the
694 few `cl' definitions that had to use `foo*' to avoid conflicts with
695 pre-existing Elisp entities. These have been renamed to `cl-foo'
696 rather than `cl-foo*'.
698 The old `cl' is now deprecated and is mainly just a bunch of aliases that
699 provide the old, non-prefixed names. Some exceptions are listed below:
701 *** `cl-flet' is not like `flet' (which is deprecated).
702 Instead it obeys the behavior of Common-Lisp's `flet'.
703 In particular, in cl-flet function definitions are lexically scoped,
704 whereas in flet the scoping is dynamic.
706 *** `cl-labels' is slightly different from `labels'.
707 The difference is that it relies on the `lexical-binding' machinery
708 (as opposed to the `lexical-let' machinery used previously) to capture
709 definitions in closures, so such closures will only work if `lexical-binding'
712 *** `cl-letf' is not exactly like `letf'.
713 The only difference is in details that relate to some deprecated usage
714 of `symbol-function' in place forms.
716 *** `progv' was rewritten to use the `let' machinery.
717 A side effect is that variables without corresponding values are bound
718 to nil rather than being made unbound.
720 *** The following methods of extending `setf' are obsolete
721 (use features from gv.el instead):
722 `define-modify-macro' (use `gv-letplace')
723 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
724 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
725 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
729 *** Changes are now highlighted using the same color scheme as in
730 modern VCSes. Deletions are displayed in red (new faces
731 `diff-refine-removed' and `smerge-refined-removed', and new definition
732 of `diff-removed'), insertions in green (new faces `diff-refine-added'
733 and `smerge-refined-added', and new definition of `diff-added').
735 *** The variable `diff-use-changed-face' defines whether to use the
736 face `diff-changed', or `diff-removed' and `diff-added' to highlight
737 changes in context diffs.
739 *** The new command `diff-delete-trailing-whitespace' removes trailing
740 whitespace introduced by a diff.
742 ** Ediff now uses the same color scheme as Diff mode.
746 A new version of python.el, which provides several new features, including:
747 per-buffer shells, better indentation, Python 3 support, and improved
748 shell-interaction compatible with iPython (and virtually any other
751 *** Some user options have been replaced/renamed, including (old -> new):
752 **** python-indent -> python-indent-offset
753 **** python-guess-indent -> python-indent-guess-indent-offset
754 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
755 **** python-use-skeletons -> python-skeleton-autoinsert
757 *** Some user options have been removed, including:
759 **** `python-indent-string-contents': Strings are never indented.
761 **** `python-honour-comment-indentation':
762 Comments are always considered as indentation markers.
764 **** `python-continuation-offset': Indentation is automatically
765 calculated in a pep8 compliant way depending on the context.
767 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
768 Have no direct mapping as the shell interaction is completely different.
770 **** `python-python-command', `python-jython-command':
771 Replaced by `python-shell-interpreter'.
773 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
774 `python-pdbtrack-minor-mode-string', `python-source-modes':
777 *** Some commands have been replaced (old -> new):
778 **** python-insert-class -> python-skeleton-class
779 **** python-insert-def -> python-skeleton-def
780 **** python-insert-for -> python-skeleton-for
781 **** python-insert-if -> python-skeleton-if
782 **** python-insert-try/except -> python-skeleton-try
783 **** python-insert-try/finally -> python-skeleton-try
784 **** python-insert-while -> python-skeleton-while
785 **** python-find-function -> python-nav-jump-to-defun
786 **** python-next-statement -> python-nav-forward-sentence
787 **** python-previous-statement -> python-nav-backward-sentence
788 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
789 **** python-end-of-defun-function -> python-nav-end-of-defun
790 **** python-send-buffer -> python-shell-send-buffer
791 **** python-send-defun -> python-shell-send-defun
792 **** python-send-region -> python-shell-send-region
793 **** python-send-region-and-go -> emulate with python-shell-send-region
794 and python-shell-switch-to-shell
795 **** python-send-string -> python-shell-send-string
796 **** python-switch-to-python -> python-shell-switch-to-shell
797 **** python-describe-symbol -> python-eldoc-at-point
801 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
803 *** The D-Bus object manager interface is implemented.
805 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
806 if their value does not fit into Emacs's integer range.
808 *** The function `dbus-call-method' is now non-blocking.
809 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
811 *** Signals can also be sent as unicast messages.
813 *** The argument list of `dbus-register-signal' has been extended,
814 according to the new match rule types of D-Bus.
816 *** `dbus-init-bus' supports private connections.
818 *** There is a new function `dbus-setenv'.
820 ** `desktop-path' no longer includes the "." directory.
821 Desktop files are now located in ~/.emacs.d by default.
825 *** `dired-do-async-shell-command' executes each file sequentially
826 if the command ends in `;' (when operating on multiple files).
827 Otherwise, it executes the command on each file in parallel.
829 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
830 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
833 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
834 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
835 mark/unmark/flag all files in the active region.
837 *** The minibuffer default for `=' (`dired-diff) has changed.
838 It is now the backup file for the file at point, if one exists.
839 In Transient Mark mode the default is the file at the active mark.
841 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
842 The global binding for `M-=', `count-words-region' is in effect.
846 *** New module "notifications", which can send a notification when you
847 receive a private message or your nickname is mentioned.
849 *** ERC will look up server/channel names via auth-source and use any
852 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
853 only applies to messages sent by lurkers.
855 ** reStructuredText mode
857 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
858 fontification, comment handling, and customization have all been revised
861 *** Support for `imenu' and `which-function-mode'.
863 *** The reStructuredText syntax is more closely covered.
864 Sphinx support has been improved.
866 *** `rst-insert-list' inserts new list or continues existing lists.
868 *** A negative prefix argument always works for `rst-adjust'.
870 *** The window configuration is reset after displaying a TOC.
872 *** The constant `rst-version' describes the rst.el package version.
876 *** Support for percent literals and recognition of regular expressions
877 in method calls without parentheses with more methods, including Cucumber
880 *** Improved syntax highlighting and indentation.
882 *** New command `ruby-toggle-block', bound to `C-c {'.
884 *** Some non-standard keybindings/commands have been removed:
886 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
888 **** `ruby-mark-defun'; use `mark-defun'.
890 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
891 appropriate settings for the variables `beginning-of-defun-function'
892 and `end-of-defun-function'.
894 **** Non-standard keybindings for `backward-kill-word', `comment-region',
895 `reindent-then-newline-and-indent' and `newline' have been removed.
899 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
901 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
903 *** `sh-use-smie' lets you choose a new indentation and navigation code.
907 *** The free software compiler GHDL is supported (and now the default).
909 *** Support for the VHDL-AMS packages has been added/updated.
911 *** Updated to the 2002 revision of the VHDL standard.
913 *** Accepts \r and \f as whitespace.
917 *** The faces used by Apropos are now directly customizable.
918 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
919 see the `apropos' Custom group for details.
921 *** The old options whose values specified faces to use have been removed
922 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
926 *** This package has been rewritten to use Tabulated List mode.
928 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
929 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
933 *** Algebraic simplification mode is now the default.
934 To restrict to the limited simplifications given by the former
935 default simplification mode, use `m I'.
939 *** You can customize the header text that appears above each calendar month.
940 See the variable `calendar-month-header'.
942 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
944 *** The calendars produced by cal-html include holidays.
945 Customize `cal-html-holidays' to change this.
949 *** The major modes from the parser generators "Bovine" and "Wisent"
950 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
951 are in `auto-mode-alist', and the corresponding manuals are included.
955 **** Menu support for the "Configuration" feature. This allows users to
956 choose the active configuration (such as debug or install) from the menu.
958 **** New command `ede-set' to interactively set project-local variables.
960 **** Support for compiling, debugging, and running in "generic" projects.
962 **** Autoconf editing support for M4 macros with complex arguments.
964 **** Compilation support for the "linux" project type.
966 **** "simple" projects have been removed; use "generic" projects instead.
970 **** Support for parsing #include statements inside a namespace in C/C++.
972 **** Improved support for 'extern "C"' declarations in C/C++.
974 **** The ability to ignore more common special C/C++ preprocessor symbols,
975 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
976 If available, include cdefs.h as an additional source of preprocessor symbols.
978 **** Improved C/C++ function pointer parsing.
980 **** In Python, support for converting imports to include file names.
982 **** Ability to dynamically determine the Python load path.
984 **** Support for the Python 'WITH' and 'AT' keywords.
986 **** Improved tooltip completion.
990 **** The SRecode manual is now included.
992 **** Tag generation supports constructor/destructor settings and system
993 include differentiation.
995 **** Addition of 'Framework' support: Frameworks are specified when a
996 particular kind of library (such as Android) is needed in a common language
999 **** Support for nested templates and let variables override based on priority.
1001 **** Support for merging tables from multiple related modes, such as
1002 default -> c++ -> arduino.
1004 ** Compile has a new option `compilation-always-kill'.
1008 *** `custom-reset-button-menu' now defaults to t.
1010 *** Non-option variables are never matched in `customize-apropos' and
1011 `customize-apropos-options' (i.e., the prefix argument does nothing for
1012 these commands now).
1016 *** The variables `term-default-fg-color' and `term-default-bg-color'
1017 are now deprecated in favor of the customizable face `term'.
1019 *** You can customize how to display ANSI terminal colors and styles
1020 by customizing the corresponding `term-color-<COLOR>',
1021 `term-color-underline' and `term-color-bold' faces.
1025 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1027 *** Remote processes are now also supported on remote MS-Windows hosts.
1031 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1032 Previously, this slot stored semicolon-separated attribute-value pairs
1033 appended to some imap URLs, but this is not compatible with RFC 3986.
1034 So now the `filename' slot stores the entire path and query components,
1035 and the `attributes' slot is always nil.
1037 *** New function `url-encode-url' for encoding a URI string.
1038 The `url-retrieve' function now uses this to encode its URL argument,
1039 in case that is not properly encoded.
1041 ** notifications.el supports now version 1.2 of the Notifications API.
1042 The function `notifications-get-capabilities' returns the supported
1045 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1046 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1047 `flymake-warning-bitmap'.
1049 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1050 specifying URL types that should be converted to remote file names at
1051 the FFAP prompt. The default is now '("ftp").
1053 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1054 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1056 ** New option `mouse-avoidance-banish-position' specifies where the
1057 `banish' mouse avoidance setting moves the mouse.
1059 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1060 closing brackets to be aligned with the line of the opening bracket.
1062 ** In Proced mode, new command `proced-renice' renices marked processes.
1064 ** New option `async-shell-command-buffer' specifies the buffer to use
1065 for a new asynchronous `shell-command' when the default output buffer
1066 `*Async Shell Command*' is already in use.
1068 ** SQL mode has a new option `sql-db2-escape-newlines'.
1069 If non-nil, newlines sent to the command interpreter will be escaped
1070 by a backslash. The default does not escape the newlines and assumes
1071 that the sql statement will be terminated by a semicolon.
1073 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1074 (and modes that derive from it), sorts the column at point, or the Nth
1075 column if a numeric prefix argument is given.
1077 ** `which-func-modes' now defaults to t, so Which Function mode, when
1078 enabled, applies to all applicable major modes.
1080 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1083 ** Follow mode no longer works by using advice.
1084 The option `follow-intercept-processes' has been removed.
1086 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1088 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1089 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1090 *** semantic-change-hooks -> semantic-change-functions
1091 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1092 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1093 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1094 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1095 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1096 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1097 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1098 *** rcirc-activity-hooks -> rcirc-activity-functions
1099 *** rcirc-print-hooks -> rcirc-print-functions
1100 *** dbus-event-error-hooks -> dbus-event-error-functions
1101 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1102 *** checkdoc-style-hooks -> checkdoc-style-functions
1103 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1104 *** archive-extract-hooks -> archive-extract-hook
1105 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1106 *** hfy-post-html-hooks -> hfy-post-html-hook
1107 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1108 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1109 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1110 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1112 ** Obsolete packages
1115 In most cases, assoc+member+push+delq work just as well.
1116 And in any case it's just a terrible package: ugly semantics, terrible
1117 inefficiency, and not namespace-clean.
1126 * Incompatible Lisp Changes in Emacs 24.3
1128 ** Docstrings starting with `*' no longer indicate user options.
1129 Only variables defined using `defcustom' are considered user options.
1130 The function `user-variable-p' is now an obsolete alias for
1131 `custom-variable-p'.
1133 ** The return values of `defalias', `defun' and `defmacro' have changed,
1134 and are now undefined. For backwards compatibility, `defun' and
1135 `defmacro' currently return the name of the newly defined
1136 function/macro, but this should not be relied upon.
1138 ** `random' by default now returns a different random sequence in
1139 every Emacs run. Use `(random S)', where S is a string, to set the
1140 random seed to a value based on S, in order to get a repeatable
1141 sequence in later calls.
1143 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1144 that substring is inserted literally even if the LITERAL arg is
1145 non-nil, instead of causing an error to be signaled.
1147 ** `select-window' now always makes the window's buffer current.
1148 It does so even if the window was selected before.
1150 ** The function `x-select-font' can return a font spec, instead of a
1151 font name as a string. Whether it returns a font spec or a font name
1152 depends on the graphical library.
1154 ** `face-spec-set' no longer sets frame-specific attributes when the
1155 third argument is a frame (that usage was obsolete since Emacs 22.2).
1157 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1159 ** The CL package's `get-setf-method' function no longer exists.
1160 Generalized variables are now part of core Emacs Lisp, and implemented
1161 differently to the way cl.el used to do it. It is not possible to
1162 define a compatible replacement for `get-setf-method'. See the file
1163 gv.el for internal details of the new implementation.
1165 ** The arguments of `dbus-register-signal' are no longer just strings,
1166 but keywords or keyword-string pairs. The old argument list will
1167 still be supported for Emacs 24.x.
1169 ** Miscellaneous name changes
1170 Some Lisp symbols have been renamed to correct their spelling,
1171 or to be more consistent with standard Emacs terminology.
1173 *** Renamed functions
1174 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1175 **** inactivate-input-method -> deactivate-input-method
1176 **** quail-inactivate -> quail-deactivate
1177 **** robin-inactivate -> robin-deactivate
1178 **** viper-inactivate-input-method -> viper-deactivate-input-method
1179 **** viper-inactivate-input-method-action ->
1180 viper-deactivate-input-method-action
1181 **** ucs-input-inactivate -> ucs-input-deactivate
1184 The old hooks are still supported for backward compatibility, but they
1185 are deprecated and will be removed eventually.
1186 **** input-method-inactivate-hook -> input-method-deactivate-hook
1187 **** robin-inactivate-hook -> robin-deactivate-hook
1188 **** quail-inactivate-hook -> quail-deactivate-hook
1190 *** Renamed variables
1191 **** follow-deactive-menu -> follow-inactive-menu
1192 **** inactivate-current-input-method-function ->
1193 deactivate-current-input-method-function
1195 ** Some obsolete functions, variables, and faces have been removed:
1196 *** `last-input-char', `last-command-char', `unread-command-char'
1197 *** `facemenu-unlisted-faces'
1198 *** `rmail-decode-mime-charset'
1199 *** `iswitchb-read-buffer'
1200 *** `sc-version', `sc-submit-bug-report'
1201 *** `set-char-table-default'
1202 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1203 *** `compile-internal'
1205 *** `mode-line-inverse-video'
1206 *** `follow-mode-off-hook'
1207 *** `cvs-commit-buffer-require-final-newline'
1208 (use `log-edit-require-final-newline' instead)
1209 *** `cvs-changelog-full-paragraphs'
1210 (use `log-edit-changelog-full-paragraphs' instead)
1211 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1212 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1213 *** `vc-master-templates' (use `vc-handled-backends' instead)
1214 *** `vc-checkout-carefully'
1217 * Lisp Changes in Emacs 24.3
1219 ** CL-style generalized variables are now in core Elisp.
1220 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1221 You can define your own generalized variables using `gv-define-simple-setter',
1222 `gv-define-setter', etc.
1224 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1225 This can significantly speed up execution of non-byte-compiled code,
1226 but can also bump into previously unnoticed cyclic dependencies.
1227 These are generally harmless: they will simply cause the macro calls
1228 to be left for later expansion (as before), but will result in a
1229 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1230 You may wish to restructure your code so this does not happen.
1232 ** New sampling-based Elisp profiler.
1233 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1234 When finished, use M-x profiler-stop. The sampling rate can be based on
1235 CPU time or memory allocations.
1237 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1238 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1240 ** New macros `setq-local' and `defvar-local'.
1242 ** Face underlining can now use a wave.
1244 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1245 of `read-regexp' accepts a string ending with a colon and space, and its
1246 second argument DEFAULTS can be a list of strings accessible via `M-n'
1247 in the minibuffer ahead of other hard-coded useful regexp-related values.
1248 More commands use `read-regexp' now to read their regexp arguments.
1252 *** New function `completion-table-with-quoting' to handle completion
1253 in the presence of quoting, such as file completion in shell buffers.
1255 *** New function `completion-table-subvert' to use an existing completion
1256 table, but with a different prefix.
1260 *** New error type and new function `user-error'.
1261 These do not trigger the debugger.
1263 *** New option `debugger-bury-or-kill', saying what to do with the
1264 debugger buffer when exiting debug.
1266 *** Set `debug-on-message' to enter the debugger when a certain
1267 message is displayed in the echo area. This can be useful when trying
1268 to work out which code is doing something.
1270 *** New var `inhibit-debugger', automatically set to prevent accidental
1271 recursive invocations.
1275 *** New command `fit-frame-to-buffer' adjusts the frame height to
1278 *** The command `fit-window-to-buffer' can adjust the frame height
1279 if the new option `fit-frame-to-buffer' is non-nil.
1281 *** New macro `with-temp-buffer-window', similar to
1282 `with-output-to-temp-buffer'.
1284 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1287 *** New option `switch-to-buffer-preserve-window-point' to restore a
1288 window's point when switching buffers.
1290 *** New display action alist entries `window-height' and `window-width'
1291 specify the size of new windows created by `display-buffer'.
1293 *** New display action alist entry `pop-up-frame-parameters', if
1294 non-nil, specifies frame parameters to give any newly-created frame.
1296 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1297 tells display action functions to avoid changing which frame is
1300 *** New display action alist entry `previous-window', if non-nil,
1301 specifies window to reuse in `display-buffer-in-previous-window'.
1303 *** New display action functions `display-buffer-below-selected',
1304 and `display-buffer-in-previous-window'.
1306 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1307 now accept a third argument to avoid choosing the selected window.
1309 *** Additional values recognized for option `window-combination-limit'.
1311 *** The following variables are obsolete, as they can be replaced by
1312 appropriate entries in the `display-buffer-alist' function introduced
1314 **** `dired-shrink-to-fit'
1315 **** `display-buffer-reuse-frames'
1316 **** `display-buffer-function'
1317 **** `special-display-buffer-names'
1318 **** `special-display-frame-alist'
1319 **** `special-display-function'
1320 **** `special-display-regexps'
1324 *** `current-time-string' no longer requires that its argument's year
1325 must be in the range 1000..9999. It now works with any year supported
1326 by the underlying C implementation.
1328 *** `current-time' now returns extended-format time stamps
1329 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1330 PSEC is typically a multiple of 1000 on current machines. Other
1331 functions that use this format, such as `file-attributes' and
1332 `format-time-string', have been changed accordingly. Old-format time
1333 stamps are still accepted.
1335 *** The format of timers in `timer-list' and `timer-idle-list' is now
1336 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1337 The PSECS slot is new, and uses picosecond resolution. It can be
1338 accessed via the new `timer--psecs' accessor.
1340 *** Last-modified time stamps in undo lists now are of the form
1341 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1345 *** Improved security when handling persistent objects:
1347 **** `eieio-persistent-read' now features optional arguments for specifying
1348 the class to load, as well as a flag stating whether subclasses are allowed;
1349 if provided, other classes will be rejected by the reader. For
1350 compatibility with existing code, if the class is omitted only a
1353 **** New specialized reader for pulling in classes and signaling errors
1354 without evaluation of suspicious code.
1356 **** All slots that contain objects must have a :type. Slots with lists
1357 of objects must use a new type predicate for a list of an object type.
1359 *** Support for `find-function' and similar utilities, through the addition
1360 of filename support to generated symbols.
1362 ** Floating point functions now always return special values like NaN,
1363 instead of signaling errors, if given invalid args; e.g., (log -1.0).
1364 Previously, they returned NaNs on some platforms but signaled errors
1365 on others. The affected functions are acos, asin, tan, exp, expt,
1366 log, log10, sqrt, and mod.
1368 ** New fringe bitmap `exclamation-mark'.
1370 ** Miscellaneous changes to special forms and macros
1372 *** `defun' and `defmacro' are now macros rather than special forms.
1374 *** `kbd' is now a function rather than a macro.
1376 ** Miscellaneous new functions
1378 *** `set-temporary-overlay-map' sets up a temporary keymap that
1379 takes precedence over most other maps for a short while (normally one key).
1381 *** `autoloadp' tests if its argument is an autoloaded object.
1383 *** `autoload-do-load' performs the autoloading operation.
1385 *** `buffer-narrowed-p' tests if the buffer is narrowed.
1387 *** `file-name-base' returns a file name sans directory and extension.
1389 *** `function-get' fetches a function property, following aliases.
1391 *** `posnp' tests if an object is a `posn'.
1393 *** `system-users' returns the user names on the system.
1395 *** `system-groups' returns the group names on the system.
1397 *** `tty-top-frame' returns the topmost frame of a text terminal.
1399 ** The following functions and variables are obsolete:
1400 *** `automount-dir-prefix' (use `directory-abbrev-alist')
1401 *** `buffer-has-markers-at'
1402 *** `macro-declaration-function' (use `macro-declarations-alist')
1403 *** `window-system-version' (provides no useful information)
1404 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
1405 *** `query-replace-interactive'
1406 *** `font-list-limit' (has had no effect since Emacs < 23)
1409 * Changes in Emacs 24.3 on Non-Free Operating Systems
1411 ** Cygwin builds can use the native MS Windows user interface.
1412 Pass `--with-w32' to configure. The default remains the X11 interface.
1414 ** Two new functions are available in Cygwin builds:
1415 `cygwin-convert-file-name-from-windows' and
1416 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
1417 code to access the Cygwin file-name mapping machinery to convert
1418 between Cygwin and Windows-native file and directory names.
1420 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
1421 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
1422 `mouse-autoselect-window'.
1424 ** On MS Windows Vista and later Emacs now supports symbolic links.
1426 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
1427 support for libxml2, even if its presence is detected.
1429 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1431 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
1432 directories to the search path. You must add them yourself if you want them.
1435 * Changes in Emacs 24.2
1437 ** This is mainly a bug-fix release.
1440 * Installation Changes in Emacs 24.1
1442 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1443 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1444 also depend on Gtk+. You can disable them with --without-rsvg and
1447 ** Emacs can be compiled with GnuTLS support.
1448 This happens by default if a suitably recent version of the library is
1449 found at build time. To prevent this, use the configure option
1450 `--without-gnutls'. See below for GnuTLS features.
1452 ** Emacs can be compiled with SELinux support.
1453 This happens by default if a suitably recent version of the library is
1454 found at build time. To prevent this, use the configure option
1455 `--without-selinux'. See below for SELinux features.
1457 ** Emacs can be compiled with ImageMagick support.
1458 This happens by default if a suitably recent version of the library is
1459 found at build time. To prevent this, use the configure option
1460 `--without-imagemagick'. See below for ImageMagick features.
1461 This feature is not available for the Nextstep or MS ports.
1463 ** Emacs can be compiled with libxml2 support.
1464 This happens by default if a suitably recent version of the library is
1465 found at build time. To prevent this, use the configure option
1466 `--without-xml2'. See below for libxml2 features.
1468 ** By default, the installed Info and man pages are compressed.
1469 You can disable this by configuring --without-compress-info.
1471 ** New configure option --with-wide-int.
1472 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
1473 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1476 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
1477 These provide no new functionality, they just remove the need to edit
1478 lib-src/Makefile by hand in order to use the associated features.
1480 ** New configure option --enable-use-lisp-union-type.
1481 This is only useful for Emacs developers to debug certain types of bugs.
1482 This is not a new feature; only the configure flag is new.
1484 ** The standalone programs digest-doc and sorted-doc are removed.
1485 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1487 ** The standalone program `fakemail' is removed.
1488 If you need it, feedmail.el provides a superset of the functionality.
1491 * Startup Changes in Emacs 24.1
1493 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1494 command line arguments, and the EMACS_UNIBYTE environment variable, no
1495 longer have any effect. (They were declared obsolete in Emacs 23.)
1497 ** New command line option `--no-site-lisp' removes site-lisp directories
1498 from load-path. -Q now implies this. This option does not affect the
1499 EMACSLOADPATH environment variable (and hence has no effect for
1503 * Changes in Emacs 24.1
1507 *** Many packages now use the `completion-at-point' command,
1508 rather than implementing separate completion commands.
1510 *** `completion-at-point' now handles tags and semantic completion.
1512 *** Completion in a non-minibuffer now tries to detect the end of completion
1513 and pops down the *Completions* buffer accordingly.
1515 *** New option `completion-cycle-threshold' allows completion cycling.
1517 *** New option `completion-category-overrides' for overriding the
1518 default completion style in certain circumstances.
1520 *** New completion style `substring'.
1522 *** Completion of buffer names uses `substring' completion by default.
1524 *** The option `widget-complete-field' has been removed.
1528 *** The first time you try sending mail, Emacs asks for a mail method.
1529 This is implemented by a new default for `send-mail-function', which
1530 is `sendmail-query-once'. This offers to use the smtpmail package, or
1531 to use the old defaults relying on external mail facilities
1532 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
1533 `mailclient-send-it' on Windows).
1535 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
1536 transfers the report to your desktop's preferred mail client, if there
1537 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
1540 *** See Changes in Specialized Modes and Packages for SMTPmail changes
1541 and Mail mode changes
1543 ** Emacs server and client changes
1545 *** New option `server-port' specifies the port for TCP Emacs servers.
1547 *** New emacsclient argument -q/--quiet suppresses some status messages.
1549 *** New emacsclient argument --frame-parameters specifies the frame
1550 parameters of any newly-created graphical frame.
1552 *** If emacsclient shuts down due to Emacs signaling an error,
1553 its exit status is 1.
1555 *** New emacsclient argument --parent-id ID.
1556 This opens a client frame in parent X window ID, via XEmbed, similar
1557 to the --parent-id argument to Emacs.
1559 ** Internationalization changes
1561 *** Emacs now supports display and editing of bidirectional text.
1562 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1563 displayed in the correct visual order as expected by users of those
1564 scripts. The display reordering is a "full bidirectionality" class
1565 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1566 with no RTL text should look exactly the same as before.
1568 **** New buffer-local variable `bidi-display-reordering'.
1569 To disable display reordering in a buffer, change this to nil.
1571 **** New buffer-local variable `bidi-paragraph-direction'.
1572 If nil (the default), Emacs determines the base direction of each
1573 paragraph from its text, as specified by the UBA. Setting the value
1574 to `right-to-left' or `left-to-right' forces a base direction on each
1577 Paragraphs with right-to-left base direction are displayed starting at
1578 the right window edge.
1580 *** Enhanced support for characters with no glyphs in available fonts,
1581 or, on text terminals, characters that cannot be encoded by the
1582 terminal coding system. The new option `glyphless-char-display-control'
1583 specifies how to display them: as a hexadecimal code in a box, a thin
1584 1-pixel space, an empty box, etc.
1586 *** New input methods for Farsi and Bulgarian
1587 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
1589 *** `nobreak-char-display' now also highlights Unicode hyphen chars
1590 (U+2010 and U+2011).
1592 *** New Hebrew translation of the Emacs Tutorial.
1593 Type `C-u C-h t' to choose it in case your language setup doesn't
1594 automatically select it.
1596 ** An Emacs Lisp package manager is now included.
1597 This is a convenient way to download and install additional packages,
1598 from a package repository at http://elpa.gnu.org.
1600 *** M-x list-packages shows a list of packages, which can be
1601 selected for installation.
1603 *** New command `describe-package', bound to `C-h P'.
1605 *** By default, all installed packages are loaded automatically when
1606 Emacs starts up. To disable this, set `package-enable-at-startup' to
1607 nil. To specify the packages to load, customize `package-load-list'.
1609 ** Custom theme changes
1611 *** New command `M-x customize-themes', which provides a convenient
1612 interface for enabling and disabling Custom themes.
1614 *** New option `custom-theme-load-path' is the load path for themes.
1615 Emacs no longer looks for Custom themes in `load-path'. The default
1616 value of `custom-theme-load-path' says to look for themes in
1617 `custom-theme-directory', followed by a subdirectory of
1618 `data-directory' named "themes/", which contains a small selection of
1619 built-in Custom themes.
1621 *** New option `custom-safe-themes' records known-safe theme files.
1622 If a theme is not in this list, Emacs queries before loading it, and
1623 offers to save the theme to `custom-safe-themes' automatically. By
1624 default, all themes included in Emacs are treated as safe.
1626 ** Improved GTK integration
1628 *** GTK scroll-bars are now placed on the right by default.
1629 The function `set-scroll-bar-mode' can change this.
1631 *** GTK tool bars can have just text, just images or images and text.
1632 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
1633 the default is taken from desktop settings.
1635 *** GTK tool bars can be placed on any edge of the frame.
1636 The frame-parameter tool-bar-position controls this. It takes the
1637 values top, left, right or bottom. The Options => Show/Hide menu has
1640 *** The default colors for selected text (the `region' face) are taken
1641 from the GTK theme when Emacs is built with GTK.
1643 *** Emacs uses GTK tooltips by default if built with GTK.
1644 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
1646 ** Graphical interface changes
1648 *** On graphical displays, the mode-line no longer ends in dashes.
1649 Also, the first dash (which does not indicate anything) is just
1650 displayed as a space.
1652 *** `menu-bar-select-buffer-function' lets you choose another operation
1653 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
1655 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
1656 built with Xft. These fonts can be set via X resources, for example:
1657 Emacs.pane.menubar.font: Courier-12
1661 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
1662 or if it receives a SIGINT signal in batch mode.
1664 *** `kill-emacs-hook' is now also run in batch mode.
1665 Third-party code which adds to `kill-emacs-hook' should check if they
1666 do the right thing in batch mode.
1668 ** Scrolling changes
1670 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
1671 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
1672 of buffer at first key-press (instead they move to top/bottom of buffer)
1673 when `scroll-error-top-bottom' is non-nil.
1675 *** New option `scroll-error-top-bottom' (see above).
1677 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
1678 scroll a line instead of full screen.
1680 *** New property `scroll-command' should be set on a command's symbol to
1681 define it as a scroll command affected by `scroll-preserve-screen-position'.
1683 *** If you customize `scroll-conservatively' to a value greater than 100,
1684 Emacs will never recenter point in the window when it scrolls due to
1685 cursor motion commands or commands that move point (e.f., `M-g M-g').
1686 Previously, you needed to use `most-positive-fixnum' as the value of
1687 `scroll-conservatively' to achieve the same effect.
1689 *** "Aggressive" scrolling now honors the scroll margins.
1690 If you customize `scroll-up-aggressively' or
1691 `scroll-down-aggressively' and move point off the window, Emacs now
1692 scrolls the window so as to avoid positioning point inside the scroll
1695 ** Basic SELinux support has been added.
1696 This requires Emacs to be linked with libselinux at build time.
1698 *** Emacs preserves the SELinux file context when backing up.
1699 Also, the function `copy-file' has an extra optional argument for
1700 preserving SELinux context, and the return value of `backup-buffer'
1701 now includes the SELinux context.
1703 *** New functions `file-selinux-context' and `set-file-selinux-context'
1704 get and set the SELinux context of a file.
1708 *** `delete-by-moving-to-trash' now only affects commands that specify
1709 trashing. This avoids inadvertently trashing temporary files.
1711 *** Calling `delete-file' or `delete-directory' with a prefix argument
1712 now forces true deletion, regardless of `delete-by-moving-to-trash'.
1714 ** File- and directory-local variable changes
1716 *** You can stop directory local vars from applying to subdirectories.
1717 Add an element (subdirs . nil) to the alist portion of any variables
1718 settings to indicate that the section should not apply to
1721 *** Directory local variables can apply to some file-less buffers.
1722 Affected modes include dired, vc-dir, and log-edit. For example,
1723 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
1724 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
1725 `hack-dir-local-variables-non-file-buffer' to support this.
1727 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
1728 Instead, use "eval: (minor-mode 1)".
1730 *** The variable `inhibit-first-line-modes-regexps' has been renamed
1731 to `inhibit-local-variables-regexps'. As the name suggests, it now
1732 applies to ALL file local variables, not just -*- lines. The
1733 associated `inhibit-first-line-modes-suffixes' has been renamed in the
1738 *** The `quit-window' command now restores the last buffer displayed
1739 in the quitted window.
1741 *** Resizing an Emacs frame now preserves proportional window sizes,
1742 modulo restrictions like window minimum sizes and fixed-size windows.
1744 *** The behavior of `display-buffer' is now customizable in detail.
1746 **** New option `display-buffer-base-action' specifies a list of
1747 user-determined display "actions" (functions and optional arguments
1748 for choosing the displaying window).
1750 This takes precedence over the default display action, which is
1751 specified by `display-buffer-fallback-action'.
1753 **** New option `display-buffer-alist' maps buffer name regexps to
1754 display actions, taking precedence over `display-buffer-base-action'.
1756 *** New option `window-combination-limit'.
1757 The new option `window-combination-limit' allows to return the space
1758 obtained for resizing or creating a window more reliably to the window
1759 from which such space was obtained.
1761 *** New option `window-combination-resize'.
1762 The new option `window-combination-resize' allows to split a window that
1763 otherwise cannot be split because it's too small by stealing space from
1764 other windows in the same combination. Subsequent resizing or deletion
1765 of the window will resize all windows in the same combination as well.
1767 *** New option `frame-auto-hide-function' lets you choose between
1768 iconifying or deleting a frame when burying a buffer in a dedicated
1769 frame, or quitting a window showing a buffer in a frame of its own.
1771 *** New commands `maximize-window' and `minimize-window'.
1772 These maximize and minimize the size of a window within its frame.
1774 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
1775 These functions allow to navigate through the live buffers that have
1776 been shown in a specific window.
1778 ** Minibuffer changes
1780 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
1781 This is handy for minibuffer-only frames, and is also used for the feature
1782 where mouse-1 pops up *Messages*"', which can now easily be changed.
1784 *** Minibuffers set `truncate-lines' to nil.
1785 If you want to change the value to something else, you could use
1786 for example `minibuffer-setup-hook'.
1788 ** `auto-mode-case-fold' is now enabled by default.
1790 ** `backup-by-copying-when-mismatch' now defaults to t.
1792 ** New basic faces `error', `warning', `success'.
1793 These are used to highlight text indicating failure, caution or
1794 successful operation.
1796 ** New option `list-colors-sort' defines the color sort order
1797 for `list-colors-display'.
1799 ** The variable `focus-follows-mouse' now always defaults to nil.
1802 * Editing Changes in Emacs 24.1
1806 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
1807 `isearch-yank-line'.
1809 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
1810 `isearch-yank-kill'.
1812 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
1814 ** New commands `count-words-region' and `count-words'.
1816 *** M-= is bound to `count-words-region', not `count-lines-region'.
1817 The `count-words-region' command, when called interactively, reports
1818 the number of lines, words, and characters in the region. It is a
1819 superset of the old `count-lines-region', which is now an obsolete
1822 ** The command `just-one-space' (M-SPC), if given a negative argument,
1823 also deletes newlines around point.
1827 *** New option `delete-active-region'.
1828 If non-nil, [delete] and DEL delete the region if it is active and no
1829 prefix argument is given. If set to `kill', those commands kill
1832 *** New command `delete-forward-char', bound to [delete].
1833 This is meant for interactive use, and obeys `delete-active-region'.
1834 The command `delete-char' does not obey `delete-active-region'.
1836 *** `delete-backward-char' is now a Lisp function.
1837 Apart from obeying `delete-active-region', its behavior is unchanged.
1838 However, the byte compiler now warns if it is called from Lisp; Lisp
1839 callers should use delete-char with a negative argument instead.
1841 *** The option `mouse-region-delete-keys' has been deleted.
1843 ** Selection changes.
1845 The default handling of clipboard and primary selections has been
1846 changed to conform with modern X applications. In short, most
1847 commands for killing and yanking text now use the clipboard, while
1848 mouse commands use the primary selection.
1850 In the following, we provide a list of these changes, followed by a
1851 list of steps to get the old behavior back if you prefer that.
1853 *** `select-active-regions' now defaults to t.
1854 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
1855 the kill ring. The selected text is put in the primary selection, if
1856 the system possesses a separate primary selection facility (e.g. X).
1858 **** `select-active-regions' also accepts a new value, `only'.
1859 This means to only set the primary selection for temporarily active
1860 regions (usually made by mouse-dragging or shift-selection);
1861 "ordinary" active regions, such as those made with C-SPC followed by
1862 point motion, do not alter the primary selection.
1864 **** `mouse-drag-copy-region' now defaults to nil.
1866 *** mouse-2 is now bound to `mouse-yank-primary'.
1867 This pastes from the primary selection, ignoring the kill-ring.
1868 Previously, mouse-2 was bound to `mouse-yank-at-click'.
1870 *** `x-select-enable-clipboard' now defaults to t on all platforms.
1872 *** `x-select-enable-primary' now defaults to nil.
1873 Thus, commands that kill text or copy it to the kill-ring (such as
1874 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
1876 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
1877 exactly equivalent to M-w, C-w, and C-y respectively.
1879 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
1880 non-nil by default, as Windows does not support the primary selection
1881 between applications.
1883 *** To return to the previous behavior, do the following:
1885 **** Change `select-active-regions' to nil.
1886 **** Change `mouse-drag-copy-region' to t.
1887 **** Change `x-select-enable-primary' to t (on X only).
1888 **** Change `x-select-enable-clipboard' to nil.
1889 **** Bind `mouse-yank-at-click' to mouse-2.
1891 *** Support for X cut buffers has been removed.
1893 *** X clipboard managers are now supported.
1894 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
1896 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
1897 in the current rectangle. With a prefix argument, this prompts for a
1898 number to count from and for a format string.
1900 ** `redisplay-dont-pause' now defaults to t.
1901 This makes Emacs feel more responsive to editing commands that arrive
1902 at high rate, e.g. if you lean on some key, because stopping redisplay
1903 in the middle (when this variable is nil) forces more expensive
1904 updates later on, and Emacs appears to be unable to keep up.
1906 ** The behavior of <TAB> for active regions in Text mode has changed.
1907 In Text and related modes, typing <TAB> (`indent-for-tab-command')
1908 when the region is active causes Emacs to indent all the lines in the
1909 region, aligning them with the line previous to the first line in the
1910 region (or with the left margin if there is no previous line).
1912 ** When `occur' is called with a prefix argument, matching strings are
1913 collected into the `*Occur*' buffer without line numbers. If there
1914 are parenthesized subexpressions in the specified regexp, `occur'
1915 reads replacement text that may contain \\& and \\N whose convention
1916 follows `replace-match'.
1919 * Changes in Specialized Modes and Packages in Emacs 24.1
1921 ** Archive Mode has basic support for browsing and updating 7z archives.
1925 *** BibTeX mode now supports biblatex.
1926 Use the variable `bibtex-dialect' to select different BibTeX dialects.
1927 `bibtex-entry-field-alist' is now an obsolete alias for
1928 `bibtex-BibTeX-entry-alist'.
1930 *** New command `bibtex-search-entries', bound to C-c C-a.
1932 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
1934 *** New variable `bibtex-search-entry-globally'.
1938 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
1940 *** The default browser used by the package is now the "xdg-open" program,
1941 on platforms that support it. This calls your desktop's preferred browser.
1945 *** Support for musical notes.
1947 *** Support for logarithmic units.
1949 *** No longer uses the tex prefix for TeX specific unit names when
1950 using TeX or LaTeX mode.
1952 *** New option to highlight selections using faces.
1954 *** `calc-histogram' has the option of using a vector to determine the bins.
1956 *** New "O" option prefix.
1958 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
1960 ** Calendar, Diary, and Appt
1962 *** Diary entries can contain non-printing "comments".
1963 See the variable `diary-comment-start'.
1965 *** Appointments can specify their individual warning times.
1966 See the variable `appt-warning-time-regexp'.
1968 *** The function specified by `appt-disp-window-function' may be passed
1969 lists of arguments if multiple appointments are due at similar times.
1970 If you are using a custom function for this, you should update it.
1972 *** New function `diary-hebrew-birthday'.
1974 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
1975 may no longer be nil, but must all be strings.
1977 *** The obsolete (since Emacs 22.1) method of enabling the appt
1978 package by adding `appt-make-list' to `diary-hook' has been removed.
1979 Use `appt-activate' instead.
1981 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
1982 appt-issue-message (use the function appt-activate)
1983 appt-visible/appt-msg-window (use the variable appt-display-format)
1985 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
1986 view-diary-entries, list-diary-entries, show-all-diary-entries
1990 *** New feature to "guess" the style in an existing buffer.
1991 The main entry point is M-x c-guess.
1993 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
1995 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
1996 Thus C-M-a will, by default, go to the beginning of the immediate function,
1999 *** "Macros with semicolons" can be registered for correct indentation.
2000 Where such a macro ends a line (no semicolon) the next statement is no longer
2001 parsed as a statement continuation.
2003 ** Comint and modes derived from it use the standard completion code.
2007 *** Compilation mode can be used without Font Lock mode.
2008 `compilation-parse-errors-function' is now obsolete.
2010 *** New variable `compilation-filter-start', which is bound while
2011 `compilation-filter-hook' runs. It records the start position of the
2012 text inserted by `compilation-filter'.
2014 *** `compilation-error-screen-columns' and `compilation-first-column'
2015 are obeyed in the editing buffer. So programming language modes can
2016 set them, whereas previously only the value in the *Compilation*
2021 *** Customize buffers now contain a search field.
2022 The search is performed using `customize-apropos'.
2023 To turn off the search field, set `custom-search-field' to nil.
2025 *** Options in customize group buffers start out hidden if not customized.
2026 Use the arrow to the left of the option name to toggle visibility.
2028 *** custom-buffer-sort-alphabetically now defaults to t.
2030 *** The color widget now has a "Choose" button, which allows you to
2031 choose a color via `list-colors-display'.
2035 *** It is now possible to access buses other than the default system
2038 *** The `dbus-register-method' and `dbus-register-property' functions
2039 optionally do not register names.
2041 *** The new function `dbus-register-service' registers a known service
2042 name on a D-Bus without also registering a property or a method.
2046 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2047 if called with a prefix argument, read a file name from the minibuffer
2048 instead of using the current buffer.
2050 *** The "dired local variables" feature of Dired-x is obsolete.
2051 The standard directory local variables feature replaces it.
2055 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2056 controlling attempts to autojoin a channel.
2058 *** New variable `erc-coding-system-precedence': If we use `undecided'
2059 as the server coding system, this variable will then be consulted.
2060 The default is to decode strings that can be decoded as utf-8 as
2061 utf-8, and do the normal `undecided' decoding for the rest.
2065 *** The default value of `eshell-directory-name' has changed
2066 to be an "eshell" directory in `user-emacs-directory'.
2067 The old "~/.eshell/" directory is still used if it exists, though.
2071 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2072 It now supports multithread non-stop debugging and simultaneous
2073 debugging of several threads.
2077 *** RET (`image-toggle-animation') toggles animation, if applicable.
2078 Animation plays once, unless the option `image-animate-loop' is non-nil.
2082 *** New command M-x info-display-manual displays a named Info manual.
2083 If that manual is already visited in some Info buffer, it displays
2084 that buffer. (This is handy if you have many manuals in many *info*
2085 buffers, and don't remember the name of the buffer visiting the manual
2086 you want to consult.) Otherwise, it loads and displays the manual.
2088 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2089 This is for compatibility with the stand-alone Info reader program,
2090 and also because `Info-edit' is a rarely used command that is disabled
2093 ** Mail mode changes (not Message mode)
2095 *** New command M-x mail-add-attachment for adding MIME attachments
2097 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2098 (Its name is misleading, since it has nothing to do with MIME
2099 attachments.) The old name is now an obsolete alias to the new name.
2101 ** MH-E has been updated to MH-E version 8.3.1.
2102 See MH-E-NEWS for details.
2104 ** Modula-2 mode provides auto-indentation.
2106 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2108 ** nXML mode no longer binds C-RET to `nxml-complete'.
2109 Completion is now performed via `completion-at-point', bound to C-M-i
2110 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2111 default), this performs tag completion.
2113 ** Org mode has been updated to version 7.8.09.
2114 See ORG-NEWS for details.
2116 ** Prolog mode has been completely revamped, with lots of additional
2117 functionality such as more intelligent indentation, electricity,
2118 support for more variants, including Mercury, and a lot more.
2122 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2123 in the Rmail incoming message.
2125 *** The variable `rmail-message-filter' no longer has any effect.
2126 This change was made in Emacs 23.1 but was not advertised at the time.
2127 Try using `rmail-show-message-hook' instead.
2131 *** M-x shell prompts for the shell path name if the default directory
2132 is a remote file name and neither the environment variable $ESHELL nor
2133 the variable `explicit-shell-file-name' is set.
2135 *** TAB is now bound to the standard `completion-at-point' command,
2136 which now implements the pcomplete rules for shell command completion.
2140 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2141 if the mail server supports them. This uses either built-in GnuTLS
2142 support, or the starttls.el library. Customize `smtpmail-stream-type'
2145 *** The variable `smtpmail-auth-credentials' has been removed.
2146 By default, the information is now stored in the file ~/.authinfo.
2147 This was the default value of smtpmail-auth-credentials. If you had
2148 customized smtpmail-auth-credentials to a list of user names and
2149 passwords, those settings are not used. During your first connection
2150 to the smtp server, Emacs will prompt for the user name and password,
2151 and offer to save them to ~/.authinfo. Or you can manually copy the
2152 credentials to ~/.authinfo. For example, if you had
2154 (setq smtpmail-auth-credentials
2155 '(("mail.example.org" 25 "jim" "s!cret")))
2157 then the equivalent line in ~/.authinfo would be
2159 machine mail.example.org port 25 login jim password s!cret
2161 See the auth-source manual for more information, e.g. on encrypting
2162 the credentials file.
2164 *** The variable `smtpmail-starttls-credentials' has been removed.
2165 If you had that set, you need to put
2167 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2169 in your ~/.authinfo file instead.
2171 *** SMTPmail defaults to using the address in the From: header as the
2172 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2173 to the address you wish to use instead.
2177 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2178 and `sql-oracle-scan-on'.
2180 *** New options controlling prompting for login parameters.
2181 Each supported product has a custom variable `sql-*-login-params',
2182 which is a list of the parameters to be prompted for before a
2183 connection is established.
2185 *** The command `sql-product-interactive' now takes a prefix argument,
2186 which causes it to prompt for an SQL product.
2188 *** Product-specific SQL interactive commands now take prefix arguments.
2189 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2190 given a prefix argument, prompt for a name for the SQL interactive
2191 buffer. This reduces the need for calling `sql-rename-buffer'.
2193 *** SQL interactive modes suppress command continuation prompts, and
2194 replace tabs with spaces. The first change impacts multiple line SQL
2195 statements entered with C-j between each line, statements yanked into
2196 the buffer and statements sent with `sql-send-*' functions. The
2197 second prevents the MySQL and Postgres interpreters from listing
2198 object name completions when sent text via `sql-send-*' functions.
2200 *** New command `sql-connect' starts a predefined SQLi session,
2201 using the login parameters from `sql-connection-alist'.
2203 *** New "Save Connection" menu item in SQLi buffers.
2204 This gathers the login params specified for the SQLi session, if it
2205 was not started by a connection, and saves them as a new connection.
2207 *** New commands for listing database objects and details:
2208 sql-list-all and sql-list-table.
2210 *** An API for manipulating SQL product definitions has been added.
2214 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2218 *** New inline access method "ksu" (kerberized su).
2220 *** The following access methods are discontinued: "ssh1_old",
2221 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2223 *** The user option `remote-file-name-inhibit-cache' controls whether
2224 remote file attributes are cached for better performance.
2226 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2227 default value to "".
2229 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2230 for remote machines which support SELinux.
2232 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2233 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2234 the degree of parallelism.
2236 ** VC and related modes
2238 *** Support for pulling on distributed version control systems.
2239 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2240 supported (currently with Bzr, Git, and Mercurial), to update the
2241 current branch and working tree. A prefix argument means to prompt
2242 the user for specifics, e.g. a pull location.
2244 *** `vc-update' is now an alias for `vc-pull'.
2246 *** Support for merging on distributed version control systems.
2247 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2248 is supported (currently with Bzr, Git, and Mercurial), to merge
2249 changes from another branch into the current one. It prompts for
2250 specifics, e.g. a merge source.
2252 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2253 shows a diff while querying the user. It defaults to t.
2255 *** Log entries in some Log View buffers can be toggled to display a
2256 longer description by typing RET (log-view-toggle-entry-display).
2257 This is currently supported for Bzr, Git, and Mercurial (to support
2258 another backend, define a `log-view-expanded-log-entry-function').
2259 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2260 use this to display the full log entry for the revision at point.
2262 *** New command `vc-ediff' allows visual comparison of two revisions
2263 of a file similar to `vc-diff', but using ediff backend.
2265 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2266 this was not advertised at the time.
2268 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2269 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2270 this was not advertised at the time.
2276 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2278 *** partial-completion-mode (complete.el) is obsolete.
2279 You can get a comparable behavior with:
2280 (setq completion-styles '(partial-completion initials))
2281 (setq completion-pcm-complete-word-inserts-delimiters t)
2283 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2285 *** pgg is obsolete (use EasyPG instead).
2287 *** sregex.el is obsolete, since rx.el is a strict superset.
2289 *** s-region.el and pc-select.el are obsolete.
2290 They are superseded by shift-select-mode, enabled by default since 23.1.
2292 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2296 *** The Landmark game is now invoked with `landmark', not `lm'.
2297 Its functions and variables have been similarly renamed.
2299 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2300 (This interfered with cua-mode.)
2302 *** f90.el has some support for Fortran 2008 syntax.
2304 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2306 *** New command `nato-region' converts text to NATO phonetic alphabet.
2309 * New Modes and Packages in Emacs 24.1
2311 ** Occur Edit mode applies edits made in *Occur* buffers to the
2312 original buffers. It is bound to "e" in Occur mode.
2314 ** New global minor mode electric-pair-mode.
2315 When enabled, typing an open parenthesis automatically inserts the
2316 matching closing one.
2318 ** New global minor mode electric-indent-mode.
2319 When enabled, typing certain characters triggers reindentation.
2320 Major modes wishing to use this can set electric-indent-chars or
2321 electric-indent-functions.
2323 ** New global minor mode electric-layout-mode.
2324 When enabled, typing certain characters automatically inserts newlines.
2325 Major modes wishing to use this can set electric-layout-rules.
2327 ** tabulated-list.el provides a generic major mode for tabulated data,
2328 from which other modes can be derived.
2330 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2332 ** secrets.el is an implementation of the Secret Service API, an
2333 interface to password managers like GNOME Keyring or KDE Wallet. The
2334 Secret Service API requires D-Bus for communication. The command
2335 `secrets-show-secrets' offers a buffer with a visualization of the
2338 ** notifications.el provides an implementation of the Desktop
2339 Notifications API. It requires D-Bus for communication.
2341 ** soap-client.el supports access to SOAP web services from Emacs.
2342 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2344 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
2346 ** New emacs-lock.el package.
2347 The previous version has been moved to obsolete/old-emacs-lock.el.
2348 Now, there is a proper minor mode `emacs-lock-mode'. Protection
2349 against exiting Emacs and killing the buffer can be set separately.
2350 The mechanism for automatically turning off protection for buffers
2351 with dead inferior processes has been generalized.
2354 * Incompatible Lisp Changes in Emacs 24.1
2356 ** Passing a nil argument to a minor mode function call now ENABLES
2357 the minor mode unconditionally. This is so that you can write e.g.
2359 (add-hook 'text-mode-hook 'foo-mode)
2361 to enable foo-mode in Text mode buffers, removing the need for
2362 `turn-on-foo-mode' style functions. This affects all mode commands
2363 defined by `define-minor-mode'. If called interactively, the mode
2364 command still toggles the minor mode.
2366 ** The return value of `backup-buffer' has changed.
2367 It is now a list of three elements, where the second element is a list
2368 describing the original file's SELinux context. If Emacs or the
2369 system lacks SELinux support, the context list is (nil nil nil nil).
2370 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
2372 ** `char-direction-table' and the `char-direction' function were deleted.
2373 They were buggy and inferior to the new support of bidirectional
2374 editing introduced in Emacs 24. If you need the bidirectional
2375 properties of a character, use `get-char-code-property' with the last
2376 argument `bidi-class'.
2378 ** `copy-directory' now copies the source directory as a subdirectory
2379 of the target directory, if the latter is an existing directory. The
2380 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2381 the contents directly into a pre-existing target directory.
2383 ** For mouse click input events in the text area, the Y pixel
2384 coordinate in the POSITION list now counts from the top of the text
2385 area, excluding any header line. Previously, it counted from the top
2388 ** Support for "old-style" backquotes, obsolete for 10+ years, has
2389 been further reduced. Now a backquote not followed by a space is
2390 always treated as a "new-style" backquote. Please remove all
2391 "old-style" backquotes from your code. If your code uses backquotes
2392 as documented in the Elisp manual, and compiles without warning, then
2393 you have nothing to do in this regard. Code not following the
2394 appropriate conventions may fail to compile.
2396 The most common cause of trouble seems to be an old-style backquote
2397 followed by a newline. Another cause of trouble is vector notation
2398 for key sequence notation: instead of [(control ,)] and [(control ')],
2399 you should write [(control ?,)] and [(control ?')], which will work in
2402 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2403 was not advertised at the time. The function `custom-initialize-delay'
2404 replaced all known uses.
2406 ** `view-buffer' now treats special mode-class in the same way that
2407 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2408 major mode is special).
2410 ** Menu and tool bar changes
2412 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
2413 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2414 With these alist entries omitted, `make-frame' checks the value of the
2415 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2416 a menu-bar or tool-bar, respectively. If the alist entries are added,
2417 they override the value of `menu-bar-mode'/`tool-bar-mode'.
2419 *** The menu bar bindings's caches are not used any more.
2420 Use (where-is-internal <def> nil t) instead.
2422 ** Regions created by mouse dragging are now normal active regions,
2423 similar to those created by shift-selection (see Selection changes
2424 above). In previous Emacs versions, these regions were delineated by
2425 `mouse-drag-overlay'; that variable has been removed.
2427 ** The fourth argument of `filter-buffer-substring' has been removed.
2428 If you want to remove text properties from the final result, simply
2429 pass the result through substring-no-properties.
2431 ** cl.el no longer provides `cl-19'.
2433 ** The following obsolete functions and aliases have been removed
2434 (the appropriate new function is given in parentheses; "not needed"
2435 means you can just remove all calls to the function in question):
2437 *** `comint-kill-output' (`comint-delete-output')
2438 *** `decompose-composite-char' (`char-to-string')
2439 *** `outline-visible' (`outline-invisible-p')
2440 *** `internal-find-face' (`facep')
2441 *** `internal-get-face' (`facep and check-face')
2442 *** `frame-update-faces' (not needed)
2443 *** `frame-update-face-colors' (`frame-set-background-mode')
2444 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2445 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2446 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2447 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2448 *** `x-make-font-unbold' (`make-face-unbold')
2449 *** `x-make-font-unitalic' (`make-face-unitalic')
2450 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2451 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2452 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2453 *** `char-bytes' (== 1)
2454 *** `isearch-return-char' (`isearch-printing-char')
2455 *** `make-local-hook' (not needed)
2456 *** `set-screen-height' (`set-frame-height')
2457 *** `set-screen-width' (`set-frame-width')
2459 ** The following obsolete variables and varaliases have been removed
2460 (the appropriate new variable is given in parentheses):
2462 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2463 *** `vc-header-alist' (`vc-BACKEND-header')
2464 *** `directory-sep-char' (== ?/)
2465 *** `font-lock-defaults-alist' (`font-lock-defaults')
2466 *** `e' (`float-e').
2468 ** The following obsolete files were removed:
2469 sc.el, x-menu.el, rnews.el, rnewspost.el
2471 ** The format of the finder-inf.el file has changed, since the Finder
2472 mechanism is now based on the package system. The variable
2473 `finder-package-info' is replaced by `package--builtins' and
2474 `finder-keywords-hash'.
2476 ** When generating autoloads, `update-directory-autoloads' no longer
2477 assumes every inspected file is in your `load-path'. It instead
2478 generates relative names according to the current `load-path'.
2481 * Lisp Changes in Emacs 24.1
2483 ** Code can now use lexical scoping by default instead of dynamic scoping.
2484 The `lexical-binding' variable enables lexical scoping for local
2485 variables. It is typically set via a file-local variable in the first
2486 line of the file, in which case it applies to all the code in that
2489 *** `eval' takes a new optional argument `lexical' to choose the new lexical
2490 binding instead of the old dynamic binding mode.
2492 *** Lexically scoped interpreted functions are represented with a new form
2493 of function value which looks like (closure ENV ARGS &rest BODY).
2495 *** New macro `letrec' to define recursive local functions.
2497 *** `defvar' and `defconst' now mark the variable as special (dynamic).
2498 So do `defcustom' and other forms that call `defvar' as a subroutine.
2500 *** New function `special-variable-p' to check whether a variable is
2501 declared as dynamically bound.
2503 *** The form ((lambda ...) ...) is deprecated.
2505 ** An Emacs Lisp testing tool is now included.
2506 Emacs Lisp developers can use this tool to write automated tests for
2507 their code. See the ERT info manual for details.
2509 ** Changes for bidirectional display and editing
2511 *** New function `current-bidi-paragraph-direction'.
2512 This returns the base direction of the paragraph at point.
2514 *** New function `bidi-string-mark-left-to-right'.
2515 Given a string containing characters from right-to-left scripts, this
2516 function returns another string which can be safely inserted into a
2517 buffer, such that any following text will be always displayed to the
2518 right of that string. (This works by appending an invisible Unicode
2519 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
2521 This is useful when the buffer has overall left-to-right paragraph
2522 direction and you need to insert a string whose contents are not known
2523 in advance, without disrupting the layout of the line.
2527 *** Window tree functions are accessible in Elisp.
2528 Functions are provided to return the parent, siblings or child windows
2529 of any window including internal windows (windows not associated with a
2530 buffer) in the window tree.
2532 **** New function `window-valid-p' gives non-nil for live and internal
2535 **** Window manipulation can deal with internal windows.
2536 Many window handling functions like `split-window', `delete-window', or
2537 `delete-other-windows' as well as the window resizing functions can now
2538 act on any window including internal ones.
2540 *** window-total-height/-width vs window-body-height/-width.
2541 The function `window-height' has been renamed to `window-total-height'
2542 and `window-width' has been renamed to `window-body-width'. The old
2543 names are provided as aliases. Two new functions `window-total-width'
2544 and `window-body-height' are provided.
2546 *** Window parameters specific to window handling functions.
2547 For each window you can specify a parameter to override the default
2548 behavior of a number of functions like `split-window', `delete-window'
2549 and `delete-other-windows'. The variable `ignore-window-parameters'
2550 allows to ignore processing such parameters.
2552 *** New semantics of third argument of `split-window'.
2553 The third argument of `split-window' has been renamed to SIDE and can be
2554 set to any of the values 'below, 'right, 'above, or 'left to make the
2555 new window appear on the corresponding side of the window that shall be
2556 split. Any other value of SIDE will cause `split-window' to split the
2557 window into two side-by-side windows as before.
2559 *** Window resizing functions.
2560 A new standard function for resizing windows called `window-resize' has
2561 been introduced. This and all other functions for resizing windows no
2562 longer delete any windows when they become too small.
2564 *** Deleting the selected window now selects the most recently selected
2565 live window on that frame instead.
2567 *** `adjust-window-trailing-edge' adjustments.
2568 `adjust-window-trailing-edge' can now deal with fixed-size windows and
2569 is able to resize other windows if a window adjacent to the trailing
2570 edge cannot be shrunk any more. This makes its behavior more similar to
2571 that of Emacs 21 without compromising, however, its inability to delete
2572 windows which was introduced in Emacs 22.
2574 *** Window-local buffer lists.
2575 Windows now have local buffer lists. This means that removing a buffer
2576 from display in a window will preferably show the buffer previously
2577 shown in that window with its previous window-start and window-point
2578 positions. This also means that the same buffer may be automatically
2579 shown twice even if it already appears in another window.
2581 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2582 which if non-nil requires the buffer to be displayed in the currently
2583 selected window, signaling an error otherwise. If nil, another window
2584 can be used, e.g. if the selected one is strongly dedicated.
2586 *** `split-window-vertically' and `split-window-horizontally' renamed
2587 to `split-window-below' and `split-window-right' respectively.
2588 The old names are kept as aliases.
2592 **** The second arg to `display-buffer' and `pop-to-buffer' is now
2593 named ACTION, and takes a display action of the same form as
2594 `display-buffer-base-action' (see Changes, above). A non-nil,
2595 non-list value is treated specially, as the old meaning.
2597 **** New variable `display-buffer-overriding-action'.
2599 **** The procedure of `display-buffer' etc. to choose a window is
2600 determined by combining `display-buffer-overriding-action',
2601 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2602 and `display-buffer-fallback-action'. The second and fourth of these
2603 are user-customizable variables.
2605 See the docstring of `display-buffer' for details.
2607 *** New functions `window-state-get' and `window-state-put'.
2608 These functions allow to save and restore the state of an arbitrary
2609 frame or window as an Elisp object.
2613 *** New variable `completion-extra-properties' used to specify extra
2614 properties of the current completion:
2615 - :annotate-function, same as the old completion-annotate-function.
2616 - :exit-function, function to call after completion took place.
2618 *** Functions on `completion-at-point-functions' can return any of the
2619 properties valid for `completion-extra-properties'.
2621 *** `completion-annotate-function' is obsolete.
2623 *** New `metadata' method for completion tables. The metadata thus returned
2624 can specify various details of the data returned by `all-completions':
2625 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
2626 used to select a style in completion-category-overrides.
2627 - `annotation-function' to add annotations in *Completions*.
2628 - `display-sort-function' to specify how to sort entries in *Completions*.
2629 - `cycle-sort-function' to specify how to sort entries when cycling.
2631 *** `minibuffer-local-filename-must-match-map' is not used any more.
2632 Instead, the bindings in `minibuffer-local-filename-completion-map'
2633 are combined with `minibuffer-local-must-match-map'.
2635 *** New variable `completing-read-function' allows overriding the
2636 behavior of `completing-read'.
2638 ** `glyphless-char-display' can now distinguish between graphical and
2639 text terminal display, via a char-table entry that is a cons cell.
2641 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
2642 Instead, the offending function is removed.
2646 *** New function `run-hook-wrapped' for running an abnormal hook by
2647 passing the hook functions as arguments to a "wrapping" function.
2648 Like `run-hook-with-args-until-success', it stops at the first
2649 non-nil return value.
2651 *** New macro `with-wrapper-hook' for running an abnormal hook as a
2652 set of "wrapping" filters, similar to around advice.
2653 (A version of this macro was actually added in Emacs 23.2 but was not
2654 advertised at the time.)
2658 *** New macro `condition-case-unless-debug' (this was actually added in
2659 Emacs 23.1 as condition-case-no-debug, but not advertised)
2661 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
2663 *** Variable `stack-trace-on-error' removed.
2665 *** The debugger can now "continue" from an error, which means it will
2666 jump to the error handler as if the debugger had not been invoked
2667 instead of jumping all the way to the top-level.
2669 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
2670 This can be useful when `inhibit-quit' is set.
2672 ** The new function `server-eval-at' allows evaluation of Lisp forms on
2673 named Emacs server instances.
2675 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
2676 to redirect STDOUT to a file.
2678 ** The function `format-time-string' now supports the %N directive,
2679 for higher-resolution time stamps.
2681 ** New input reading functions
2683 *** New function `read-char-choice' reads a restricted set of
2684 characters, discarding any inputs not inside the set.
2686 *** The command `read-color' now requires a match for a color name
2687 or RGB triplet, instead of signaling an error if the user provides
2690 **** `facemenu-read-color' is now an alias for `read-color'.
2692 ** `image-library-alist' is renamed to `dynamic-library-alist'.
2693 The variable is now used to load all kind of supported dynamic libraries,
2694 not just image libraries. The previous name is still available as an
2697 ** Syntax parsing changes
2699 *** New variable `syntax-propertize-function'.
2700 This replaces `font-lock-syntactic-keywords' which is now obsolete.
2701 This allows syntax-table properties to be set independently from font-lock:
2702 just call syntax-propertize to make sure the text is propertized.
2703 Together with this new variable come a new hook
2704 syntax-propertize-extend-region-functions, as well as two helper functions:
2705 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
2706 as-is; and syntax-propertize-rules which provides a new way to specify
2709 *** Syntax tables support a new "comment style c" additionally to style b.
2711 ** New hook `post-self-insert-hook', run after `self-insert-command'.
2713 ** frame-local variables cannot be let-bound any more.
2715 ** Major and minor mode changes
2717 *** `set-auto-mode' now respects mode: local variables at the end of files,
2718 as well as those in the -*- line.
2720 *** `prog-mode' is a new major mode from which programming modes
2723 **** `prog-mode-hook' can be used to enable features for programming
2724 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
2725 on-the-fly spell checking for comments and strings.
2727 *** New hook `change-major-mode-after-body-hook', run by
2728 `run-mode-hooks' just before any other mode hooks.
2730 *** Enabled globalized minor modes can be disabled in specific major modes.
2731 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
2732 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
2734 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
2736 ** File-handling changes
2738 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
2739 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
2740 both non-nil. Interactively, TRASH defaults to t, unless a prefix
2741 argument is supplied (see Trash changes, above).
2743 *** New file predicates: `file-equal-p', `file-in-directory-p'.
2745 ** Tool-bars can display separators.
2746 Tool-bar separators are handled like menu separators in menu-bar maps,
2747 i.e. via menu entries of the form `(menu-item "--")'.
2751 *** Animated images support (currently animated gifs only).
2753 **** `image-animated-p' returns non-nil if an image can be animated.
2755 **** `image-animate' animates a supplied image spec.
2757 **** `image-animate-timer' returns the timer object for an image that
2760 *** `image-extension-data' has been renamed to `image-metadata'.
2761 The old name is an obsolete alias to the new one.
2763 *** Image mode can view any image type that ImageMagick supports.
2764 This requires Emacs to be built with ImageMagick support.
2766 **** New function `imagemagick-types', defined if ImageMagick support
2767 is enabled, returns a list of image file extensions that your
2768 ImageMagick installation supports.
2770 **** New function `imagemagick-register-types' enables ImageMagick
2771 image types in Image mode and in `create-image' and other helper
2774 **** New option `imagemagick-types-inhibit' excludes certain
2775 ImageMagick image types from `imagemagick-register-types'.
2777 **** With ImageMagick support, there are extra Image mode commands to
2778 resize and rotate images: `image-transform-fit-to-height',
2779 `image-transform-fit-to-width', `image-transform-set-rotation', and
2780 `image-transform-set-scale'.
2782 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
2783 passes it to the mail user agent function. This argument specifies an
2784 action for returning to the caller after finishing with the mail. For
2785 example, this is used by Rmail to optionally delete a mail window.
2787 ** XML and HTML parsing
2788 If Emacs is compiled with libxml2 support, there are two new
2789 functions: `libxml-parse-html-region' (which parses "real world" HTML)
2790 and `libxml-parse-xml-region' (which parses XML). Both return an
2791 Emacs Lisp parse tree.
2793 ** Networking and encryption changes
2795 *** `open-network-stream' can now be used to open an encrypted stream.
2796 It now accepts an optional `:type' parameter for initiating a TLS
2797 connection, directly or via STARTTLS. To do STARTTLS, additional
2798 parameters (`:end-of-command', `:success', `:capabilities-command')
2799 must also be supplied.
2801 *** New library gnutls.el.
2802 The new function `gnutls-available-p' returns non-nil if Emacs is
2803 built with GnuTLS support. The main entry points are
2804 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
2805 these functions through `open-network-stream', because that can
2806 upgrade connections through STARTTLS opportunistically or use plain
2807 SSL, depending on your needs. For debugging, set `gnutls-log-level'
2810 *** New primitive `secure-hash' that supports many secure hash algorithms:
2811 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
2812 sha1.el has been removed. The `sha1' feature is provided by default.
2816 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
2818 ** Progress reporters can now "spin".
2819 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
2820 now be nil, or omitted. This makes a "non-numeric" reporter. Each
2821 time you call `progress-reporter-update' on that progress reporter,
2822 with a nil or omitted VALUE argument, the reporter message is
2823 displayed with a "spinning bar".
2825 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
2826 being reverted, even if the buffer has a local `revert-buffer-function'.
2828 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
2829 If delayed-warnings-list is non-nil, the command loop calls
2830 `delayed-warnings-hook' after `post-command-hook'. At present, this
2831 is only used by Emacs on some platforms to display warnings during
2832 startup, which might otherwise not be noticed. This uses the
2833 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
2835 ** rx.el has a new `group-n' construct for explicitly numbered groups.
2837 ** New function `make-composed-keymap' that constructs a new keymap
2838 from multiple input maps. You can use this to make a keymap that
2839 inherits from multiple maps, eg:
2840 (set-keymap-parent newmap (make-composed-keymap othermap parent))
2842 ** New function `string-prefix-p'.
2843 (This was actually added in Emacs 23.2 but was not advertised at the time.)
2845 ** New reader macro ## that stands for the empty symbol.
2846 This means that the empty symbol can now be read back. Also, #: by itself
2847 (when not immediately followed by a possible symbol character) stands for
2848 an empty uninterned symbol.
2850 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
2852 ** The following functions and variables are obsolete:
2854 *** `tooltip-use-echo-area' is obsolete.
2855 Rather than setting this to t, disable Tooltip mode instead.
2857 *** buffer-substring-filters is obsolete.
2858 Use `filter-buffer-substring-functions' instead.
2860 *** `byte-compile-disable-print-circle' is obsolete.
2862 *** `deferred-action-list' and `deferred-action-function' are obsolete.
2863 Use `post-command-hook' instead.
2865 *** `font-lock-maximum-size' is obsolete.
2868 * Changes in Emacs 24.1 on Non-Free Operating Systems
2870 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
2871 and also when HOME is set to C:\ by default.
2873 ** New configure.bat options
2875 *** --enable-checking builds Emacs with extra runtime checks.
2877 *** --distfiles specifies files to be included in binary distribution.
2879 *** --without-gnutls disables automatic GnuTLS detection.
2881 *** --lib for general library linkage, works with the USER_LIBS build variable.
2883 ** New make target `dist' to create binary distribution for MS Windows.
2885 ** The Lisp function `w32-default-color-map' is now obsolete.
2886 (It is only used internally in the Emacs C code.)
2888 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
2889 reappear on mouse-over. (Requires OS X 10.6 or later.)
2891 ** On Mac OS X, dragging a file into Emacs visits the file, like on
2892 other platforms, rather than inserting its contents into the buffer.
2895 ----------------------------------------------------------------------
2896 This file is part of GNU Emacs.
2898 GNU Emacs is free software: you can redistribute it and/or modify
2899 it under the terms of the GNU General Public License as published by
2900 the Free Software Foundation, either version 3 of the License, or
2901 (at your option) any later version.
2903 GNU Emacs is distributed in the hope that it will be useful,
2904 but WITHOUT ANY WARRANTY; without even the implied warranty of
2905 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2906 GNU General Public License for more details.
2908 You should have received a copy of the GNU General Public License
2909 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2914 paragraph-separate: "[
\f]*$"