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
40 ** Key ? also describes prefix bindings like C-h.
43 ** `apropos-variable' is now `apropos-user-option'
44 `apropos-user-option' shows all user options while `apropos-variable'
45 shows all variables. When called with a universal prefix argument,
46 the two commands swap their behaviors. When `apropos-do-all' is
47 non-nil, they output the same results.
50 ** `eval-defun' on an already defined defcustom calls the :set function,
53 ** If the new variable `enable-dir-local-variables' is nil,
54 directory local variables are ignored. May be useful for some modes
55 that want to ignore directory-locals while still respecting file-locals.
57 ** The option `set-mark-default-inactive' has been deleted.
58 This unfinished feature was introduced by accident in Emacs 23.1;
59 simply disabling Transient Mark mode does the same thing.
61 ** `initial-buffer-choice' can now specify a function to set up the
64 ** ACL support has been added.
66 *** Emacs preserves the ACL entries of files when backing up.
68 *** New functions `file-acl' and `set-file-acl' get and set the ACL
69 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
70 libacl. On MS-Windows, the NT Security APIs are used to emulate the
73 ** New option `scroll-bar-adjust-thumb-portion'.
74 Available only on X, this option allows to control over-scrolling
75 using the scroll bar (i.e. dragging the thumb down even when the end
76 of the buffer is visible).
79 * Editing Changes in Emacs 24.4
81 ** `split-window' is no longer a command, just a non-interactive function.
82 As a command it was a special case of `split-window-below', and as such
83 superfluous. After being reimplemented in Lisp, its interactive form
84 was mistakenly retained.
86 ** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
87 bound to <f11> and M-<f10>, respectively.
89 ** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
92 ** New command `kmacro-to-register' to store keyboard macros in registers.
96 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
97 You can pick the name of the function and the variables with `C-x 4 a'.
100 * Changes in Specialized Modes and Packages in Emacs 24.4
102 ** `ido-decorations' has been slightly extended to give a bit more control.
104 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
106 ~/.emacs.d/timelog replaces ~/.timelog
107 ~/.emacs.d/todo-do replaces ~/.todo-do
108 ~/.emacs.d/todo-done replaces ~/.todo-done
109 ~/.emacs.d/todo-top replaces ~/.todo-top
110 ~/.emacs.d/vip replaces ~/.vip
111 ~/.emacs.d/viper replaces ~/.viper
112 ~/.emacs.d/ido.last replaces ~/.ido.last
113 ~/.emacs.d/kkcrc replaces ~/.kkcrc
114 ~/.emacs.d/quickurls replaces ~/.quickurls
115 ~/.emacs.d/idlwave replaces ~/.idlwave
116 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
117 ~/.emacs.d/places replaces ~/.emacs-places
118 ~/.emacs.d/shadows replaces ~/.shadows
119 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
120 ~/.emacs.d/strokes replaces ~/.strokes
121 ~/.emacs.d/notes replaces ~/.notes
122 ~/.emacs.d/type-break replaces ~/.type-break
124 ** Delphi mode is now called OPascal mode.
125 *** All delphi-* variables and functions have been renamed to opascal-*.
126 *** `delphi-newline-always-indents' is not supported any more
127 use `electric-indent-mode' instead.
128 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
130 ** Eldoc Mode works properly in the minibuffer.
132 ** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
134 ** completing-read-multiple's separator can now be a regexp.
135 The default separator is changed to allow surrounding spaces around the comma.
139 *** Battery information via the BSD `apm' utility is now supported.
143 *** New macro cl-tagbody.
146 *** letf is now just an alias for cl-letf.
150 *** Calc by default now uses the Gregorian calendar for all dates, and
151 uses January 1, 1 AD as its day number 1. Previously Calc used the
152 Julian calendar for dates before September 14, 1752, and it used
153 December 31, 1 BC as its day number 1; the new scheme is more
154 consistent with Calendar's calendrical system and day numbering.
156 *** The new variable `calc-gregorian-switch' lets you configure the
157 date when Calc switches from the Julian to the Gregorian calendar.
158 Nil, the default value, means to always use the Gregorian calendar.
159 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
162 *** Support for ISO 8601 dates.
166 *** New minor mode `dired-hide-details-mode' hides details.
170 *** New option `erc-accidental-paste-threshold-seconds'.
171 If set to a number, this can be used to avoid accidentally paste large
172 amounts of data into the ERC input.
174 ** Icomplete is a bit more like IDO.
175 *** key bindings to navigate through and select the completions.
176 *** The icomplete-separator is customizable, and its default has changed.
177 *** Removed icomplete-show-key-bindings.
181 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
182 visit the next image file and the previous image file in the same
183 directory, respectively.
185 *** New commands to show specific frames of multi-frame images.
186 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
187 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
190 *** The command `image-mode-fit-frame' deletes other windows.
191 When toggling, it restores the frame's previous window configuration.
192 It also has an optional frame argument, which can be used by Lisp
193 callers to fit the image to a frame other than the selected frame.
197 *** New face `info-index-match' is used to highlight matches in index
198 entries displayed by `Info-index-next', `Info-virtual-index' and
203 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
204 and adds it to the search string.
206 ** MH-E has been updated to MH-E version 8.5.
207 See MH-E-NEWS for details.
210 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
211 Customize `unrmail-mbox-format' to change this.
214 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
215 of how Rmail displays non-MIME messages.
218 ** New function `ses-rename-cell' to give SES cells arbitrary names.
220 ** trace-function was largely rewritten.
221 New features include:
222 - no prompting for the destination buffer, unless a prefix-arg was used.
223 - additionally to prompting for a destination buffer, when a prefix-arg is
224 used, the user can enter a "context", i.e. Lisp expression whose value at the
225 time the function is entered/exited will be printed along with the function
226 name and arguments. Useful to trace the value of (current-buffer) or
227 (point) when the function is invoked.
229 ** New command `delete-duplicate-lines' has two types of operation:
230 when its arg ADJACENT is non-nil (when called interactively with C-u C-u)
231 it works like the utility `uniq'. Otherwise by default it deletes
232 duplicate lines everywhere in the region without regard to adjacency.
234 ** New `cycle-spacing' command allows cycling between having just one
235 space, no spaces, or reverting to the original spacing. Like
236 `just-one-space' command it can handle or ignore newlines and
237 leave different number of spaces.
242 *** New connection method "adb", which allows to access Android
243 devices by the Android Debug Bridge. The variable `tramp-adb-program'
244 can be used to adapt the path of the "adb" program, if needed.
246 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
247 "scpc" and "rsyncc" are discontinued. The ssh option
248 "ControlMaster=auto" is set automatically in all ssh-based methods,
252 *** Handlers for `file-acl' and `set-file-acl' for remote machines
253 which support POSIX ACLs.
257 *** The commands `woman-default-faces' and `woman-monochrome-faces'
258 are obsolete. Customize the `woman-* faces instead.
262 *** Added Eshell-TRAMP module
263 External su and sudo commands are now the default; the internal,
264 TRAMP-using variants can still be used by enabling the eshell-tramp
267 ** Obsolete packages:
269 *** longlines.el is obsolete; use visual-line-mode instead.
271 *** terminal.el is obsolete; use term.el instead.
274 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
277 *** The Info-edit command is obsolete. Editing Info nodes by hand
278 has not been relevant for some time.
281 * New Modes and Packages in Emacs 24.4
282 ** New `superword-mode' in subword.el
283 `superword-mode' overrides the default word motion commands to treat
284 symbol_words as a single word, similar to what `subword-mode' does and
285 using the same internal functions.
287 ** New nadvice.el package offering lighter-weight advice facilities.
289 - add-function/remove-function which can be used to add/remove code on any
290 function-carrying place, such as process-filters or `<foo>-function' hooks.
291 - advice-add/advice-remove to add/remove a piece of advice on a named function,
292 much like `defadvice' does.
295 * Incompatible Lisp Changes in Emacs 24.4
297 ** `read-event' does not return decoded chars in ttys any more.
298 Just as was the case in Emacs-22 and before, decoding of tty input according to
299 keyboard-coding-system is not performed in read-event any more. But contrary
300 to that past, it is still done before input-decode-map/function-key-map/...
302 ** Removed inhibit-local-menu-bar-menus.
304 ** frame-local variables that affect redisplay do not work any more.
305 More specifically, the redisplay does not bother to check for a frame-local
306 value when looking up variables.
308 ** nil and "unbound" are indistinguishable in symbol-function.
309 `symbol-function' never signals `void-function' any more.
310 `fboundp' returns non-nil if the symbol was `fset' to nil.
312 ** `defadvice' does not honor the `freeze' flag and cannot advise
313 special-forms any more.
315 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
316 VAR was bound to nil which was not tremendously useful and just lead to
317 spurious warnings about an unused var.
319 ** The return value of `backup-buffer' has changed.
320 The second argument is no longer an SELinux context, instead it is an
321 alist of extended attributes as returned by the new function
322 `file-extended-attributes'. The attributes can be applied to another
323 file using `set-file-extended-attributes'.
326 * Lisp Changes in Emacs 24.4
328 ** Obsoleted functions:
330 *** `lisp-complete-symbol'
332 *** `minibuffer-completion-contents'
334 ** `with-wrapper-hook' is obsoleted by `add-function'.
335 The few hooks that used with-wrapper-hook are replaced as follows:
336 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
337 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
338 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
341 ** `get-upcase-table' is obsoleted by the new `case-table-get-table'.
343 ** Support for filesystem notifications.
344 Emacs now supports notifications of filesystem changes, such as
345 creation, modification, and deletion of files. This requires the
346 'inotify' API on GNU/Linux systems. On MS-Windows systems, this is
347 supported for Windows XP and newer versions.
349 ** Changes in autorevert.el
352 *** If Emacs is compiled with file notification support, notifications
353 are used instead of checking the time stamp of the files. You can
354 disable this by setting the user option `auto-revert-use-notify' to
355 nil. Alternatively, a regular expression of directories to be
356 excluded from file notifications can be specified by
357 `auto-revert-notify-exclude-dir-regexp'.
360 *** The new user option `auto-revert-remote-files' enables reversion
361 of remote files when set to non-nil.
365 *** The `face-spec-set' is now analogous to `setq' for face specs.
366 Its third arg now accepts values specifying exactly which face spec to
367 set (defface, custom, or user spec), and it directly sets the relevant
368 property using the supplied face spec.
370 *** Face specs set via Custom themes now replace the `defface' spec
371 rather than inheriting from it (as do face specs set via Customize).
373 *** New face characteristic (supports :underline (:style wave))
374 specifies whether or not the terminal can display a wavy line.
379 *** `image-animated-p' is now `image-multi-frame-p'.
380 It returns non-nil for any image that contains multiple frames,
381 whether or not it specifies a frame delay.
384 *** When animating images that do not specify a frame delay,
385 Emacs uses `image-default-frame-delay'.
388 *** New functions `image-current-frame' and `image-show-frame' for getting
389 and setting the current frame of a multi-frame image.
391 ** time-to-seconds is not obsolete any more.
392 ** New function special-form-p.
393 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
394 text-property on the first char.
396 ** The `defalias-fset-function' property lets you catch calls to defalias
397 and redirect them to your own function instead of `fset'.
399 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
400 When you edit DIR/FILE, Emacs normally creates a symbolic link
401 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
402 is being edited. Formerly, if there was already a non-symlink file
403 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
404 through DIR/.#FILE.9. These fallbacks have been removed, so that
405 Emacs now no longer locks DIR/FILE in that case.
407 On file systems that do not support symbolic links, the lock is now a
408 regular file with contents being what would have been in the symlink.
410 ** The 9th element returned by `file-attributes' is now unspecified.
411 Formerly, it was t if the file's gid would change if file were deleted
412 and recreated. This value has been inaccurate for years on many
413 platforms, and nobody seems to have noticed or cared.
415 ** The function `file-ownership-preserved-p' now has an optional
416 argument GROUP which causes it check for file group too. This can be
417 used in place of the 9th element of `file-attributes'.
419 ** New functions `group-gid' and `group-real-gid'.
421 ** The 6th argument to `copy-file' has been renamed to
422 `preserve-extended-attributes' as it now handles both SELinux context
425 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
427 *** The package descriptor and name of global variables, constants,
428 and functions should be separated by two hypens if the symbol is not
429 meant to be used by other packages.
432 * Changes in Emacs 24.4 on Non-Free Operating Systems
435 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
436 The backtrace is written to the 'emacs_backtrace.txt' file in the
437 directory where Emacs was running.
440 ** The variable `buffer-file-type' is no longer supported.
441 Setting it has no effect, and %t in the mode-line format is ignored.
442 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
443 modifying it has no effect.
446 ** Lock files now work on MS-Windows.
447 This allows to avoid losing your edits if the same file is being
448 edited in another Emacs session or by another user. See the node
449 "Interlocking" in the Emacs User Manual for the details. To disable
450 file locking, customize `create-lockfiles' to nil.
452 ** Improved fullscreen support on Mac OS X.
453 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
454 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
455 native is the default.
458 * Installation Changes in Emacs 24.3
460 ** The default X toolkit is now Gtk+ version 3.
461 If you don't pass `--with-x-toolkit' to configure, or if you use
462 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
463 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
464 You can explicitly require a specific version by passing
465 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
467 ** New configure option `--enable-link-time-optimization', to utilize
468 an appropriate feature provided by GCC since version 4.5.0.
470 ** New configure option `--without-all' to disable most of the optional
471 features (image support, etc.) that are normally enabled by default.
473 ** New configure option `--enable-gcc-warnings' (for developing/debugging
474 Emacs). If building with GCC, this enables compile-time checks that
475 warn/give errors about possibly-questionable C code. On a recent GNU
476 system there should be no warnings; on older and on non-GNU systems
477 the results may be useful to developers.
479 ** The configure option `--enable-use-lisp-union-type' has been
480 renamed to `--enable-check-lisp-object-type', as the resulting
481 Lisp_Object type no longer uses a union to implement the compile time
482 check that this option enables.
484 ** The configure option `--disable-maintainer-mode' has been removed,
485 as it was confusingly-named and rarely useful.
487 ** The configure options `--program-prefix', `--program-suffix', and
488 `--program-transform-name' apply to more than just the installed
489 binaries. Now they also affect the man pages, icons, and the
490 etc/emacs.desktop file; but not the info pages, since this would break
491 links between the various manuals.
493 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
494 overwriting "emacs" in the installation bin/ directory with a link
497 ** Emacs uses libtinfo in preference to libncurses, if available.
499 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
500 /usr/pkg/lib to the linker search path. You must add them yourself if
503 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
504 (from the bin and libexec directories, respectively). The former is
505 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
508 * Startup Changes in Emacs 24.3
510 ** Emacs no longer searches for `leim-list.el' files beneath the standard
511 lisp/ directory. There should not be any there anyway. If you have
512 been adding them there, put them somewhere else; e.g., site-lisp.
514 ** The `--no-site-lisp' command line option now works for Nextstep builds.
517 * Changes in Emacs 24.3
521 *** `C-h f' (`describe-function') can now perform autoloading.
522 When this command is called for an autoloaded function whose docstring
523 contains a key substitution construct, that function's library is
524 automatically loaded, so that the documentation can be shown
525 correctly. To disable this, set `help-enable-auto-load' to nil.
527 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
528 even after their associated libraries have been loaded (and the
529 autoloads have been redefined as functions).
533 *** Images displayed via ImageMagick now support transparency and the
534 :background image specification property.
536 *** When available, ImageMagick support is automatically enabled.
537 It is no longer necessary to call `imagemagick-register-types'
538 explicitly to install ImageMagick image types; that function is called
539 automatically at startup, or when customizing an imagemagick- option.
541 *** Setting `imagemagick-types-inhibit' to t now disables the use of
542 ImageMagick to view images. (You must call `imagemagick-register-types'
543 afterwards if you do not use customize to change this.)
545 *** The new variable `imagemagick-enabled-types' also affects which
546 ImageMagick types are treated as images. The function
547 `imagemagick-filter-types' returns the list of types that will be
552 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
553 next and previous path separator, respectively.
555 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
556 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
557 non-nil before enabling the mode.
561 *** New option `mode-line-default-help-echo' specifies the help text
562 (shown in a tooltip or in the echo area) for any part of the mode line
563 that does not have its own specialized help text.
565 *** You can now click mouse-3 in the coding system indicator to invoke
566 `set-buffer-file-coding-system'.
570 *** emacsclient now obeys string values for `initial-buffer-choice',
571 if it is told to open a new frame without specifying any file to visit
572 or expression to evaluate.
574 *** New option `server-auth-key' specifies a shared server key.
576 ** Emacs now generates backtraces on fatal errors.
577 On encountering a fatal error, Emacs now outputs a textual description
578 of the fatal signal, and a short backtrace on platforms like glibc
579 that support backtraces.
581 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
582 This minor mode replaces `toggle-read-only', which is now obsolete.
584 ** Most `y-or-n' prompts now allow you to scroll the selected window.
585 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
586 respectively, without exiting from the prompt.
588 ** In the Package Menu, newly-available packages are listed as "new",
589 and sorted above the other "available" packages by default.
591 ** If your Emacs was built from a bzr checkout, the new variable
592 `emacs-bzr-version' contains information about the bzr revision used.
594 ** New option `create-lockfiles' specifies usage of lockfiles.
595 It defaults to t. Changing it to nil inhibits the creation of lock
596 files (use this with caution).
598 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
599 variables on remote hosts.
601 ** The entry for PCL-CVS has been removed from the Tools menu.
602 The PCL-CVS commands are still available via the keyboard.
604 ** Using "unibyte: t" in Lisp source files is obsolete.
605 Use "coding: raw-text" instead.
607 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
608 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
609 The previous binding, introduced in Emacs 24.1, was a mistake, because
610 `C-c LETTER' bindings are reserved for user customizations.
612 ** Internationalization
614 *** New language environment: Persian.
616 *** New input method `vietnamese-vni'.
618 ** Nextstep (GNUstep / Mac OS X) port
620 *** Support for fullscreen and the frame parameter fullscreen.
622 *** A file dialog is used for open/save operations initiated from the
626 * Editing Changes in Emacs 24.3
628 ** Search and Replace
630 *** Non-regexp Isearch now performs "lax" space matching.
631 Each sequence of spaces in the supplied search string may match any
632 sequence of one or more whitespace characters, as specified by the
633 variable `search-whitespace-regexp'. (This variable is also used by a
634 similar existing feature for regexp Isearch.)
636 *** New Isearch command `M-s SPC' toggles lax space matching.
637 This applies to both ordinary and regexp Isearch.
639 *** New option `replace-lax-whitespace'.
640 If non-nil, `query-replace' uses flexible whitespace matching too.
643 *** Global `M-s _' starts a symbol (identifier) incremental search,
644 and `M-s _' in Isearch toggles symbol search mode.
645 `M-s c' in Isearch toggles search case-sensitivity.
647 ** Navigation commands
649 *** New binding `M-g c' for `goto-char'.
651 *** New binding `M-g TAB' for `move-to-column'.
653 *** `M-g TAB' (`move-to-column') prompts for a column number if called
654 interactively with no prefix arg. Previously, it moved to column 1.
656 ** New option `yank-handled-properties' allows processing of text
657 properties on yanked text, in ways that are more general than just
658 removing them (as is done by `yank-excluded-properties').
660 ** New option `delete-trailing-lines' specifies whether
661 M-x delete-trailing-whitespace should delete trailing lines at the end
662 of the buffer. It defaults to t.
664 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
666 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
667 `ucs-insert' is now an obsolete alias for `insert-char'.
669 ** The `z' key no longer has a binding in most special modes.
670 It used to be bound to `kill-this-buffer', but `z' is too easy to
673 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
674 It copies the region-rectangle as the last rectangle kill.
678 *** `C-x r +' is now overloaded to invoke `append-to-register'.
680 *** New option `register-separator' specifies the register containing
681 the text to put between collected texts for use with
682 M-x append-to-register and M-x prepend-to-register.
685 * Changes in Specialized Modes and Packages in Emacs 24.3
687 ** Common Lisp emulation (CL)
689 *** CL's main entry is now (require 'cl-lib).
690 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
691 i.e., all its definitions have the "cl-" prefix (and internal definitions
692 use the "cl--" prefix).
694 If `cl' provided a feature under the name `foo', then `cl-lib'
695 provides it under the name `cl-foo' instead; with the exceptions of the
696 few `cl' definitions that had to use `foo*' to avoid conflicts with
697 pre-existing Elisp entities. These have been renamed to `cl-foo'
698 rather than `cl-foo*'.
700 The old `cl' is now deprecated and is mainly just a bunch of aliases that
701 provide the old, non-prefixed names. Some exceptions are listed below:
703 *** `cl-flet' is not like `flet' (which is deprecated).
704 Instead it obeys the behavior of Common-Lisp's `flet'.
705 In particular, in cl-flet function definitions are lexically scoped,
706 whereas in flet the scoping is dynamic.
708 *** `cl-labels' is slightly different from `labels'.
709 The difference is that it relies on the `lexical-binding' machinery
710 (as opposed to the `lexical-let' machinery used previously) to capture
711 definitions in closures, so such closures will only work if `lexical-binding'
714 *** `cl-letf' is not exactly like `letf'.
715 The only difference is in details that relate to some deprecated usage
716 of `symbol-function' in place forms.
718 *** `progv' was rewritten to use the `let' machinery.
719 A side effect is that variables without corresponding values are bound
720 to nil rather than being made unbound.
722 *** The following methods of extending `setf' are obsolete
723 (use features from gv.el instead):
724 `define-modify-macro' (use `gv-letplace')
725 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
726 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
727 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
731 *** Changes are now highlighted using the same color scheme as in
732 modern VCSes. Deletions are displayed in red (new faces
733 `diff-refine-removed' and `smerge-refined-removed', and new definition
734 of `diff-removed'), insertions in green (new faces `diff-refine-added'
735 and `smerge-refined-added', and new definition of `diff-added').
737 *** The variable `diff-use-changed-face' defines whether to use the
738 face `diff-changed', or `diff-removed' and `diff-added' to highlight
739 changes in context diffs.
741 *** The new command `diff-delete-trailing-whitespace' removes trailing
742 whitespace introduced by a diff.
744 ** Ediff now uses the same color scheme as Diff mode.
748 A new version of python.el, which provides several new features, including:
749 per-buffer shells, better indentation, Python 3 support, and improved
750 shell-interaction compatible with iPython (and virtually any other
753 *** Some user options have been replaced/renamed, including (old -> new):
754 **** python-indent -> python-indent-offset
755 **** python-guess-indent -> python-indent-guess-indent-offset
756 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
757 **** python-use-skeletons -> python-skeleton-autoinsert
759 *** Some user options have been removed, including:
761 **** `python-indent-string-contents': Strings are never indented.
763 **** `python-honour-comment-indentation':
764 Comments are always considered as indentation markers.
766 **** `python-continuation-offset': Indentation is automatically
767 calculated in a pep8 compliant way depending on the context.
769 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
770 Have no direct mapping as the shell interaction is completely different.
772 **** `python-python-command', `python-jython-command':
773 Replaced by `python-shell-interpreter'.
775 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
776 `python-pdbtrack-minor-mode-string', `python-source-modes':
779 *** Some commands have been replaced (old -> new):
780 **** python-insert-class -> python-skeleton-class
781 **** python-insert-def -> python-skeleton-def
782 **** python-insert-for -> python-skeleton-for
783 **** python-insert-if -> python-skeleton-if
784 **** python-insert-try/except -> python-skeleton-try
785 **** python-insert-try/finally -> python-skeleton-try
786 **** python-insert-while -> python-skeleton-while
787 **** python-find-function -> python-nav-jump-to-defun
788 **** python-next-statement -> python-nav-forward-sentence
789 **** python-previous-statement -> python-nav-backward-sentence
790 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
791 **** python-end-of-defun-function -> python-nav-end-of-defun
792 **** python-send-buffer -> python-shell-send-buffer
793 **** python-send-defun -> python-shell-send-defun
794 **** python-send-region -> python-shell-send-region
795 **** python-send-region-and-go -> emulate with python-shell-send-region
796 and python-shell-switch-to-shell
797 **** python-send-string -> python-shell-send-string
798 **** python-switch-to-python -> python-shell-switch-to-shell
799 **** python-describe-symbol -> python-eldoc-at-point
803 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
805 *** The D-Bus object manager interface is implemented.
807 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
808 if their value does not fit into Emacs's integer range.
810 *** The function `dbus-call-method' is now non-blocking.
811 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
813 *** Signals can also be sent as unicast messages.
815 *** The argument list of `dbus-register-signal' has been extended,
816 according to the new match rule types of D-Bus.
818 *** `dbus-init-bus' supports private connections.
820 *** There is a new function `dbus-setenv'.
822 ** `desktop-path' no longer includes the "." directory.
823 Desktop files are now located in ~/.emacs.d by default.
827 *** `dired-do-async-shell-command' executes each file sequentially
828 if the command ends in `;' (when operating on multiple files).
829 Otherwise, it executes the command on each file in parallel.
831 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
832 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
835 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
836 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
837 mark/unmark/flag all files in the active region.
839 *** The minibuffer default for `=' (`dired-diff) has changed.
840 It is now the backup file for the file at point, if one exists.
841 In Transient Mark mode the default is the file at the active mark.
843 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
844 The global binding for `M-=', `count-words-region' is in effect.
848 *** New module "notifications", which can send a notification when you
849 receive a private message or your nickname is mentioned.
851 *** ERC will look up server/channel names via auth-source and use any
854 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
855 only applies to messages sent by lurkers.
857 ** reStructuredText mode
859 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
860 fontification, comment handling, and customization have all been revised
863 *** Support for `imenu' and `which-function-mode'.
865 *** The reStructuredText syntax is more closely covered.
866 Sphinx support has been improved.
868 *** `rst-insert-list' inserts new list or continues existing lists.
870 *** A negative prefix argument always works for `rst-adjust'.
872 *** The window configuration is reset after displaying a TOC.
874 *** The constant `rst-version' describes the rst.el package version.
878 *** Support for percent literals and recognition of regular expressions
879 in method calls without parentheses with more methods, including Cucumber
882 *** Improved syntax highlighting and indentation.
884 *** New command `ruby-toggle-block', bound to `C-c {'.
886 *** Some non-standard keybindings/commands have been removed:
888 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
890 **** `ruby-mark-defun'; use `mark-defun'.
892 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
893 appropriate settings for the variables `beginning-of-defun-function'
894 and `end-of-defun-function'.
896 **** Non-standard keybindings for `backward-kill-word', `comment-region',
897 `reindent-then-newline-and-indent' and `newline' have been removed.
901 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
903 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
905 *** `sh-use-smie' lets you choose a new indentation and navigation code.
909 *** The free software compiler GHDL is supported (and now the default).
911 *** Support for the VHDL-AMS packages has been added/updated.
913 *** Updated to the 2002 revision of the VHDL standard.
915 *** Accepts \r and \f as whitespace.
919 *** The faces used by Apropos are now directly customizable.
920 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
921 see the `apropos' Custom group for details.
923 *** The old options whose values specified faces to use have been removed
924 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
928 *** This package has been rewritten to use Tabulated List mode.
930 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
931 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
935 *** Algebraic simplification mode is now the default.
936 To restrict to the limited simplifications given by the former
937 default simplification mode, use `m I'.
941 *** You can customize the header text that appears above each calendar month.
942 See the variable `calendar-month-header'.
944 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
946 *** The calendars produced by cal-html include holidays.
947 Customize `cal-html-holidays' to change this.
951 *** The major modes from the parser generators "Bovine" and "Wisent"
952 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
953 are in `auto-mode-alist', and the corresponding manuals are included.
957 **** Menu support for the "Configuration" feature. This allows users to
958 choose the active configuration (such as debug or install) from the menu.
960 **** New command `ede-set' to interactively set project-local variables.
962 **** Support for compiling, debugging, and running in "generic" projects.
964 **** Autoconf editing support for M4 macros with complex arguments.
966 **** Compilation support for the "linux" project type.
968 **** "simple" projects have been removed; use "generic" projects instead.
972 **** Support for parsing #include statements inside a namespace in C/C++.
974 **** Improved support for 'extern "C"' declarations in C/C++.
976 **** The ability to ignore more common special C/C++ preprocessor symbols,
977 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
978 If available, include cdefs.h as an additional source of preprocessor symbols.
980 **** Improved C/C++ function pointer parsing.
982 **** In Python, support for converting imports to include file names.
984 **** Ability to dynamically determine the Python load path.
986 **** Support for the Python 'WITH' and 'AT' keywords.
988 **** Improved tooltip completion.
992 **** The SRecode manual is now included.
994 **** Tag generation supports constructor/destructor settings and system
995 include differentiation.
997 **** Addition of 'Framework' support: Frameworks are specified when a
998 particular kind of library (such as Android) is needed in a common language
1001 **** Support for nested templates and let variables override based on priority.
1003 **** Support for merging tables from multiple related modes, such as
1004 default -> c++ -> arduino.
1006 ** Compile has a new option `compilation-always-kill'.
1010 *** `custom-reset-button-menu' now defaults to t.
1012 *** Non-option variables are never matched in `customize-apropos' and
1013 `customize-apropos-options' (i.e., the prefix argument does nothing for
1014 these commands now).
1018 *** The variables `term-default-fg-color' and `term-default-bg-color'
1019 are now deprecated in favor of the customizable face `term'.
1021 *** You can customize how to display ANSI terminal colors and styles
1022 by customizing the corresponding `term-color-<COLOR>',
1023 `term-color-underline' and `term-color-bold' faces.
1027 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1029 *** Remote processes are now also supported on remote MS-Windows hosts.
1033 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1034 Previously, this slot stored semicolon-separated attribute-value pairs
1035 appended to some imap URLs, but this is not compatible with RFC 3986.
1036 So now the `filename' slot stores the entire path and query components,
1037 and the `attributes' slot is always nil.
1039 *** New function `url-encode-url' for encoding a URI string.
1040 The `url-retrieve' function now uses this to encode its URL argument,
1041 in case that is not properly encoded.
1043 ** notifications.el supports now version 1.2 of the Notifications API.
1044 The function `notifications-get-capabilities' returns the supported
1047 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1048 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1049 `flymake-warning-bitmap'.
1051 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1052 specifying URL types that should be converted to remote file names at
1053 the FFAP prompt. The default is now '("ftp").
1055 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1056 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1058 ** New option `mouse-avoidance-banish-position' specifies where the
1059 `banish' mouse avoidance setting moves the mouse.
1061 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1062 closing brackets to be aligned with the line of the opening bracket.
1064 ** In Proced mode, new command `proced-renice' renices marked processes.
1066 ** New option `async-shell-command-buffer' specifies the buffer to use
1067 for a new asynchronous `shell-command' when the default output buffer
1068 `*Async Shell Command*' is already in use.
1070 ** SQL mode has a new option `sql-db2-escape-newlines'.
1071 If non-nil, newlines sent to the command interpreter will be escaped
1072 by a backslash. The default does not escape the newlines and assumes
1073 that the sql statement will be terminated by a semicolon.
1075 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1076 (and modes that derive from it), sorts the column at point, or the Nth
1077 column if a numeric prefix argument is given.
1079 ** `which-func-modes' now defaults to t, so Which Function mode, when
1080 enabled, applies to all applicable major modes.
1082 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1085 ** Follow mode no longer works by using advice.
1086 The option `follow-intercept-processes' has been removed.
1088 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1090 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1091 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1092 *** semantic-change-hooks -> semantic-change-functions
1093 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1094 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1095 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1096 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1097 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1098 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1099 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1100 *** rcirc-activity-hooks -> rcirc-activity-functions
1101 *** rcirc-print-hooks -> rcirc-print-functions
1102 *** dbus-event-error-hooks -> dbus-event-error-functions
1103 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1104 *** checkdoc-style-hooks -> checkdoc-style-functions
1105 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1106 *** archive-extract-hooks -> archive-extract-hook
1107 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1108 *** hfy-post-html-hooks -> hfy-post-html-hook
1109 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1110 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1111 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1112 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1114 ** Obsolete packages
1117 In most cases, assoc+member+push+delq work just as well.
1118 And in any case it's just a terrible package: ugly semantics, terrible
1119 inefficiency, and not namespace-clean.
1128 * Incompatible Lisp Changes in Emacs 24.3
1130 ** Docstrings starting with `*' no longer indicate user options.
1131 Only variables defined using `defcustom' are considered user options.
1132 The function `user-variable-p' is now an obsolete alias for
1133 `custom-variable-p'.
1135 ** The return values of `defalias', `defun' and `defmacro' have changed,
1136 and are now undefined. For backwards compatibility, `defun' and
1137 `defmacro' currently return the name of the newly defined
1138 function/macro, but this should not be relied upon.
1140 ** `random' by default now returns a different random sequence in
1141 every Emacs run. Use `(random S)', where S is a string, to set the
1142 random seed to a value based on S, in order to get a repeatable
1143 sequence in later calls.
1145 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1146 that substring is inserted literally even if the LITERAL arg is
1147 non-nil, instead of causing an error to be signaled.
1149 ** `select-window' now always makes the window's buffer current.
1150 It does so even if the window was selected before.
1152 ** The function `x-select-font' can return a font spec, instead of a
1153 font name as a string. Whether it returns a font spec or a font name
1154 depends on the graphical library.
1156 ** `face-spec-set' no longer sets frame-specific attributes when the
1157 third argument is a frame (that usage was obsolete since Emacs 22.2).
1159 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1161 ** The CL package's `get-setf-method' function no longer exists.
1162 Generalized variables are now part of core Emacs Lisp, and implemented
1163 differently to the way cl.el used to do it. It is not possible to
1164 define a compatible replacement for `get-setf-method'. See the file
1165 gv.el for internal details of the new implementation.
1167 ** The arguments of `dbus-register-signal' are no longer just strings,
1168 but keywords or keyword-string pairs. The old argument list will
1169 still be supported for Emacs 24.x.
1171 ** Miscellaneous name changes
1172 Some Lisp symbols have been renamed to correct their spelling,
1173 or to be more consistent with standard Emacs terminology.
1175 *** Renamed functions
1176 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1177 **** inactivate-input-method -> deactivate-input-method
1178 **** quail-inactivate -> quail-deactivate
1179 **** robin-inactivate -> robin-deactivate
1180 **** viper-inactivate-input-method -> viper-deactivate-input-method
1181 **** viper-inactivate-input-method-action ->
1182 viper-deactivate-input-method-action
1183 **** ucs-input-inactivate -> ucs-input-deactivate
1186 The old hooks are still supported for backward compatibility, but they
1187 are deprecated and will be removed eventually.
1188 **** input-method-inactivate-hook -> input-method-deactivate-hook
1189 **** robin-inactivate-hook -> robin-deactivate-hook
1190 **** quail-inactivate-hook -> quail-deactivate-hook
1192 *** Renamed variables
1193 **** follow-deactive-menu -> follow-inactive-menu
1194 **** inactivate-current-input-method-function ->
1195 deactivate-current-input-method-function
1197 ** Some obsolete functions, variables, and faces have been removed:
1198 *** `last-input-char', `last-command-char', `unread-command-char'
1199 *** `facemenu-unlisted-faces'
1200 *** `rmail-decode-mime-charset'
1201 *** `iswitchb-read-buffer'
1202 *** `sc-version', `sc-submit-bug-report'
1203 *** `set-char-table-default'
1204 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1205 *** `compile-internal'
1207 *** `mode-line-inverse-video'
1208 *** `follow-mode-off-hook'
1209 *** `cvs-commit-buffer-require-final-newline'
1210 (use `log-edit-require-final-newline' instead)
1211 *** `cvs-changelog-full-paragraphs'
1212 (use `log-edit-changelog-full-paragraphs' instead)
1213 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1214 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1215 *** `vc-master-templates' (use `vc-handled-backends' instead)
1216 *** `vc-checkout-carefully'
1219 * Lisp Changes in Emacs 24.3
1221 ** CL-style generalized variables are now in core Elisp.
1222 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1223 You can define your own generalized variables using `gv-define-simple-setter',
1224 `gv-define-setter', etc.
1226 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1227 This can significantly speed up execution of non-byte-compiled code,
1228 but can also bump into previously unnoticed cyclic dependencies.
1229 These are generally harmless: they will simply cause the macro calls
1230 to be left for later expansion (as before), but will result in a
1231 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1232 You may wish to restructure your code so this does not happen.
1234 ** New sampling-based Elisp profiler.
1235 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1236 When finished, use M-x profiler-stop. The sampling rate can be based on
1237 CPU time or memory allocations.
1239 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1240 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1242 ** New macros `setq-local' and `defvar-local'.
1244 ** Face underlining can now use a wave.
1246 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1247 of `read-regexp' accepts a string ending with a colon and space, and its
1248 second argument DEFAULTS can be a list of strings accessible via `M-n'
1249 in the minibuffer ahead of other hard-coded useful regexp-related values.
1250 More commands use `read-regexp' now to read their regexp arguments.
1254 *** New function `completion-table-with-quoting' to handle completion
1255 in the presence of quoting, such as file completion in shell buffers.
1257 *** New function `completion-table-subvert' to use an existing completion
1258 table, but with a different prefix.
1262 *** New error type and new function `user-error'.
1263 These do not trigger the debugger.
1265 *** New option `debugger-bury-or-kill', saying what to do with the
1266 debugger buffer when exiting debug.
1268 *** Set `debug-on-message' to enter the debugger when a certain
1269 message is displayed in the echo area. This can be useful when trying
1270 to work out which code is doing something.
1272 *** New var `inhibit-debugger', automatically set to prevent accidental
1273 recursive invocations.
1277 *** New command `fit-frame-to-buffer' adjusts the frame height to
1280 *** The command `fit-window-to-buffer' can adjust the frame height
1281 if the new option `fit-frame-to-buffer' is non-nil.
1283 *** New macro `with-temp-buffer-window', similar to
1284 `with-output-to-temp-buffer'.
1286 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1289 *** New option `switch-to-buffer-preserve-window-point' to restore a
1290 window's point when switching buffers.
1292 *** New display action alist entries `window-height' and `window-width'
1293 specify the size of new windows created by `display-buffer'.
1295 *** New display action alist entry `pop-up-frame-parameters', if
1296 non-nil, specifies frame parameters to give any newly-created frame.
1298 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1299 tells display action functions to avoid changing which frame is
1302 *** New display action alist entry `previous-window', if non-nil,
1303 specifies window to reuse in `display-buffer-in-previous-window'.
1305 *** New display action functions `display-buffer-below-selected',
1306 and `display-buffer-in-previous-window'.
1308 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1309 now accept a third argument to avoid choosing the selected window.
1311 *** Additional values recognized for option `window-combination-limit'.
1313 *** The following variables are obsolete, as they can be replaced by
1314 appropriate entries in the `display-buffer-alist' function introduced
1316 **** `dired-shrink-to-fit'
1317 **** `display-buffer-reuse-frames'
1318 **** `display-buffer-function'
1319 **** `special-display-buffer-names'
1320 **** `special-display-frame-alist'
1321 **** `special-display-function'
1322 **** `special-display-regexps'
1326 *** `current-time-string' no longer requires that its argument's year
1327 must be in the range 1000..9999. It now works with any year supported
1328 by the underlying C implementation.
1330 *** `current-time' now returns extended-format time stamps
1331 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1332 PSEC is typically a multiple of 1000 on current machines. Other
1333 functions that use this format, such as `file-attributes' and
1334 `format-time-string', have been changed accordingly. Old-format time
1335 stamps are still accepted.
1337 *** The format of timers in `timer-list' and `timer-idle-list' is now
1338 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1339 The PSECS slot is new, and uses picosecond resolution. It can be
1340 accessed via the new `timer--psecs' accessor.
1342 *** Last-modified time stamps in undo lists now are of the form
1343 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1347 *** Improved security when handling persistent objects:
1349 **** `eieio-persistent-read' now features optional arguments for specifying
1350 the class to load, as well as a flag stating whether subclasses are allowed;
1351 if provided, other classes will be rejected by the reader. For
1352 compatibility with existing code, if the class is omitted only a
1355 **** New specialized reader for pulling in classes and signaling errors
1356 without evaluation of suspicious code.
1358 **** All slots that contain objects must have a :type. Slots with lists
1359 of objects must use a new type predicate for a list of an object type.
1361 *** Support for `find-function' and similar utilities, through the addition
1362 of filename support to generated symbols.
1364 ** Floating point functions now always return special values like NaN,
1365 instead of signaling errors, if given invalid args; e.g., (log -1.0).
1366 Previously, they returned NaNs on some platforms but signaled errors
1367 on others. The affected functions are acos, asin, tan, exp, expt,
1368 log, log10, sqrt, and mod.
1370 ** New fringe bitmap `exclamation-mark'.
1372 ** Miscellaneous changes to special forms and macros
1374 *** `defun' and `defmacro' are now macros rather than special forms.
1376 *** `kbd' is now a function rather than a macro.
1378 ** Miscellaneous new functions
1380 *** `set-temporary-overlay-map' sets up a temporary keymap that
1381 takes precedence over most other maps for a short while (normally one key).
1383 *** `autoloadp' tests if its argument is an autoloaded object.
1385 *** `autoload-do-load' performs the autoloading operation.
1387 *** `buffer-narrowed-p' tests if the buffer is narrowed.
1389 *** `file-name-base' returns a file name sans directory and extension.
1391 *** `function-get' fetches a function property, following aliases.
1393 *** `posnp' tests if an object is a `posn'.
1395 *** `system-users' returns the user names on the system.
1397 *** `system-groups' returns the group names on the system.
1399 *** `tty-top-frame' returns the topmost frame of a text terminal.
1401 ** The following functions and variables are obsolete:
1402 *** `automount-dir-prefix' (use `directory-abbrev-alist')
1403 *** `buffer-has-markers-at'
1404 *** `macro-declaration-function' (use `macro-declarations-alist')
1405 *** `window-system-version' (provides no useful information)
1406 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
1407 *** `query-replace-interactive'
1408 *** `font-list-limit' (has had no effect since Emacs < 23)
1411 * Changes in Emacs 24.3 on Non-Free Operating Systems
1413 ** Cygwin builds can use the native MS Windows user interface.
1414 Pass `--with-w32' to configure. The default remains the X11 interface.
1416 ** Two new functions are available in Cygwin builds:
1417 `cygwin-convert-file-name-from-windows' and
1418 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
1419 code to access the Cygwin file-name mapping machinery to convert
1420 between Cygwin and Windows-native file and directory names.
1422 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
1423 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
1424 `mouse-autoselect-window'.
1426 ** On MS Windows Vista and later Emacs now supports symbolic links.
1428 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
1429 support for libxml2, even if its presence is detected.
1431 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1433 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
1434 directories to the search path. You must add them yourself if you want them.
1437 * Changes in Emacs 24.2
1439 ** This is mainly a bug-fix release.
1442 * Installation Changes in Emacs 24.1
1444 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1445 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1446 also depend on Gtk+. You can disable them with --without-rsvg and
1449 ** Emacs can be compiled with GnuTLS support.
1450 This happens by default if a suitably recent version of the library is
1451 found at build time. To prevent this, use the configure option
1452 `--without-gnutls'. See below for GnuTLS features.
1454 ** Emacs can be compiled with SELinux support.
1455 This happens by default if a suitably recent version of the library is
1456 found at build time. To prevent this, use the configure option
1457 `--without-selinux'. See below for SELinux features.
1459 ** Emacs can be compiled with ImageMagick support.
1460 This happens by default if a suitably recent version of the library is
1461 found at build time. To prevent this, use the configure option
1462 `--without-imagemagick'. See below for ImageMagick features.
1463 This feature is not available for the Nextstep or MS ports.
1465 ** Emacs can be compiled with libxml2 support.
1466 This happens by default if a suitably recent version of the library is
1467 found at build time. To prevent this, use the configure option
1468 `--without-xml2'. See below for libxml2 features.
1470 ** By default, the installed Info and man pages are compressed.
1471 You can disable this by configuring --without-compress-info.
1473 ** New configure option --with-wide-int.
1474 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
1475 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1478 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
1479 These provide no new functionality, they just remove the need to edit
1480 lib-src/Makefile by hand in order to use the associated features.
1482 ** New configure option --enable-use-lisp-union-type.
1483 This is only useful for Emacs developers to debug certain types of bugs.
1484 This is not a new feature; only the configure flag is new.
1486 ** The standalone programs digest-doc and sorted-doc are removed.
1487 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1489 ** The standalone program `fakemail' is removed.
1490 If you need it, feedmail.el provides a superset of the functionality.
1493 * Startup Changes in Emacs 24.1
1495 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1496 command line arguments, and the EMACS_UNIBYTE environment variable, no
1497 longer have any effect. (They were declared obsolete in Emacs 23.)
1499 ** New command line option `--no-site-lisp' removes site-lisp directories
1500 from load-path. -Q now implies this. This option does not affect the
1501 EMACSLOADPATH environment variable (and hence has no effect for
1505 * Changes in Emacs 24.1
1509 *** Many packages now use the `completion-at-point' command,
1510 rather than implementing separate completion commands.
1512 *** `completion-at-point' now handles tags and semantic completion.
1514 *** Completion in a non-minibuffer now tries to detect the end of completion
1515 and pops down the *Completions* buffer accordingly.
1517 *** New option `completion-cycle-threshold' allows completion cycling.
1519 *** New option `completion-category-overrides' for overriding the
1520 default completion style in certain circumstances.
1522 *** New completion style `substring'.
1524 *** Completion of buffer names uses `substring' completion by default.
1526 *** The option `widget-complete-field' has been removed.
1530 *** The first time you try sending mail, Emacs asks for a mail method.
1531 This is implemented by a new default for `send-mail-function', which
1532 is `sendmail-query-once'. This offers to use the smtpmail package, or
1533 to use the old defaults relying on external mail facilities
1534 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
1535 `mailclient-send-it' on Windows).
1537 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
1538 transfers the report to your desktop's preferred mail client, if there
1539 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
1542 *** See Changes in Specialized Modes and Packages for SMTPmail changes
1543 and Mail mode changes
1545 ** Emacs server and client changes
1547 *** New option `server-port' specifies the port for TCP Emacs servers.
1549 *** New emacsclient argument -q/--quiet suppresses some status messages.
1551 *** New emacsclient argument --frame-parameters specifies the frame
1552 parameters of any newly-created graphical frame.
1554 *** If emacsclient shuts down due to Emacs signaling an error,
1555 its exit status is 1.
1557 *** New emacsclient argument --parent-id ID.
1558 This opens a client frame in parent X window ID, via XEmbed, similar
1559 to the --parent-id argument to Emacs.
1561 ** Internationalization changes
1563 *** Emacs now supports display and editing of bidirectional text.
1564 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1565 displayed in the correct visual order as expected by users of those
1566 scripts. The display reordering is a "full bidirectionality" class
1567 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1568 with no RTL text should look exactly the same as before.
1570 **** New buffer-local variable `bidi-display-reordering'.
1571 To disable display reordering in a buffer, change this to nil.
1573 **** New buffer-local variable `bidi-paragraph-direction'.
1574 If nil (the default), Emacs determines the base direction of each
1575 paragraph from its text, as specified by the UBA. Setting the value
1576 to `right-to-left' or `left-to-right' forces a base direction on each
1579 Paragraphs with right-to-left base direction are displayed starting at
1580 the right window edge.
1582 *** Enhanced support for characters with no glyphs in available fonts,
1583 or, on text terminals, characters that cannot be encoded by the
1584 terminal coding system. The new option `glyphless-char-display-control'
1585 specifies how to display them: as a hexadecimal code in a box, a thin
1586 1-pixel space, an empty box, etc.
1588 *** New input methods for Farsi and Bulgarian
1589 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
1591 *** `nobreak-char-display' now also highlights Unicode hyphen chars
1592 (U+2010 and U+2011).
1594 *** New Hebrew translation of the Emacs Tutorial.
1595 Type `C-u C-h t' to choose it in case your language setup doesn't
1596 automatically select it.
1598 ** An Emacs Lisp package manager is now included.
1599 This is a convenient way to download and install additional packages,
1600 from a package repository at http://elpa.gnu.org.
1602 *** M-x list-packages shows a list of packages, which can be
1603 selected for installation.
1605 *** New command `describe-package', bound to `C-h P'.
1607 *** By default, all installed packages are loaded automatically when
1608 Emacs starts up. To disable this, set `package-enable-at-startup' to
1609 nil. To specify the packages to load, customize `package-load-list'.
1611 ** Custom theme changes
1613 *** New command `M-x customize-themes', which provides a convenient
1614 interface for enabling and disabling Custom themes.
1616 *** New option `custom-theme-load-path' is the load path for themes.
1617 Emacs no longer looks for Custom themes in `load-path'. The default
1618 value of `custom-theme-load-path' says to look for themes in
1619 `custom-theme-directory', followed by a subdirectory of
1620 `data-directory' named "themes/", which contains a small selection of
1621 built-in Custom themes.
1623 *** New option `custom-safe-themes' records known-safe theme files.
1624 If a theme is not in this list, Emacs queries before loading it, and
1625 offers to save the theme to `custom-safe-themes' automatically. By
1626 default, all themes included in Emacs are treated as safe.
1628 ** Improved GTK integration
1630 *** GTK scroll-bars are now placed on the right by default.
1631 The function `set-scroll-bar-mode' can change this.
1633 *** GTK tool bars can have just text, just images or images and text.
1634 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
1635 the default is taken from desktop settings.
1637 *** GTK tool bars can be placed on any edge of the frame.
1638 The frame-parameter tool-bar-position controls this. It takes the
1639 values top, left, right or bottom. The Options => Show/Hide menu has
1642 *** The default colors for selected text (the `region' face) are taken
1643 from the GTK theme when Emacs is built with GTK.
1645 *** Emacs uses GTK tooltips by default if built with GTK.
1646 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
1648 ** Graphical interface changes
1650 *** On graphical displays, the mode-line no longer ends in dashes.
1651 Also, the first dash (which does not indicate anything) is just
1652 displayed as a space.
1654 *** `menu-bar-select-buffer-function' lets you choose another operation
1655 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
1657 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
1658 built with Xft. These fonts can be set via X resources, for example:
1659 Emacs.pane.menubar.font: Courier-12
1663 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
1664 or if it receives a SIGINT signal in batch mode.
1666 *** `kill-emacs-hook' is now also run in batch mode.
1667 Third-party code which adds to `kill-emacs-hook' should check if they
1668 do the right thing in batch mode.
1670 ** Scrolling changes
1672 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
1673 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
1674 of buffer at first key-press (instead they move to top/bottom of buffer)
1675 when `scroll-error-top-bottom' is non-nil.
1677 *** New option `scroll-error-top-bottom' (see above).
1679 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
1680 scroll a line instead of full screen.
1682 *** New property `scroll-command' should be set on a command's symbol to
1683 define it as a scroll command affected by `scroll-preserve-screen-position'.
1685 *** If you customize `scroll-conservatively' to a value greater than 100,
1686 Emacs will never recenter point in the window when it scrolls due to
1687 cursor motion commands or commands that move point (e.f., `M-g M-g').
1688 Previously, you needed to use `most-positive-fixnum' as the value of
1689 `scroll-conservatively' to achieve the same effect.
1691 *** "Aggressive" scrolling now honors the scroll margins.
1692 If you customize `scroll-up-aggressively' or
1693 `scroll-down-aggressively' and move point off the window, Emacs now
1694 scrolls the window so as to avoid positioning point inside the scroll
1697 ** Basic SELinux support has been added.
1698 This requires Emacs to be linked with libselinux at build time.
1700 *** Emacs preserves the SELinux file context when backing up.
1701 Also, the function `copy-file' has an extra optional argument for
1702 preserving SELinux context, and the return value of `backup-buffer'
1703 now includes the SELinux context.
1705 *** New functions `file-selinux-context' and `set-file-selinux-context'
1706 get and set the SELinux context of a file.
1710 *** `delete-by-moving-to-trash' now only affects commands that specify
1711 trashing. This avoids inadvertently trashing temporary files.
1713 *** Calling `delete-file' or `delete-directory' with a prefix argument
1714 now forces true deletion, regardless of `delete-by-moving-to-trash'.
1716 ** File- and directory-local variable changes
1718 *** You can stop directory local vars from applying to subdirectories.
1719 Add an element (subdirs . nil) to the alist portion of any variables
1720 settings to indicate that the section should not apply to
1723 *** Directory local variables can apply to some file-less buffers.
1724 Affected modes include dired, vc-dir, and log-edit. For example,
1725 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
1726 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
1727 `hack-dir-local-variables-non-file-buffer' to support this.
1729 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
1730 Instead, use "eval: (minor-mode 1)".
1732 *** The variable `inhibit-first-line-modes-regexps' has been renamed
1733 to `inhibit-local-variables-regexps'. As the name suggests, it now
1734 applies to ALL file local variables, not just -*- lines. The
1735 associated `inhibit-first-line-modes-suffixes' has been renamed in the
1740 *** The `quit-window' command now restores the last buffer displayed
1741 in the quitted window.
1743 *** Resizing an Emacs frame now preserves proportional window sizes,
1744 modulo restrictions like window minimum sizes and fixed-size windows.
1746 *** The behavior of `display-buffer' is now customizable in detail.
1748 **** New option `display-buffer-base-action' specifies a list of
1749 user-determined display "actions" (functions and optional arguments
1750 for choosing the displaying window).
1752 This takes precedence over the default display action, which is
1753 specified by `display-buffer-fallback-action'.
1755 **** New option `display-buffer-alist' maps buffer name regexps to
1756 display actions, taking precedence over `display-buffer-base-action'.
1758 *** New option `window-combination-limit'.
1759 The new option `window-combination-limit' allows to return the space
1760 obtained for resizing or creating a window more reliably to the window
1761 from which such space was obtained.
1763 *** New option `window-combination-resize'.
1764 The new option `window-combination-resize' allows to split a window that
1765 otherwise cannot be split because it's too small by stealing space from
1766 other windows in the same combination. Subsequent resizing or deletion
1767 of the window will resize all windows in the same combination as well.
1769 *** New option `frame-auto-hide-function' lets you choose between
1770 iconifying or deleting a frame when burying a buffer in a dedicated
1771 frame, or quitting a window showing a buffer in a frame of its own.
1773 *** New commands `maximize-window' and `minimize-window'.
1774 These maximize and minimize the size of a window within its frame.
1776 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
1777 These functions allow to navigate through the live buffers that have
1778 been shown in a specific window.
1780 ** Minibuffer changes
1782 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
1783 This is handy for minibuffer-only frames, and is also used for the feature
1784 where mouse-1 pops up *Messages*"', which can now easily be changed.
1786 *** Minibuffers set `truncate-lines' to nil.
1787 If you want to change the value to something else, you could use
1788 for example `minibuffer-setup-hook'.
1790 ** `auto-mode-case-fold' is now enabled by default.
1792 ** `backup-by-copying-when-mismatch' now defaults to t.
1794 ** New basic faces `error', `warning', `success'.
1795 These are used to highlight text indicating failure, caution or
1796 successful operation.
1798 ** New option `list-colors-sort' defines the color sort order
1799 for `list-colors-display'.
1801 ** The variable `focus-follows-mouse' now always defaults to nil.
1804 * Editing Changes in Emacs 24.1
1808 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
1809 `isearch-yank-line'.
1811 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
1812 `isearch-yank-kill'.
1814 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
1816 ** New commands `count-words-region' and `count-words'.
1818 *** M-= is bound to `count-words-region', not `count-lines-region'.
1819 The `count-words-region' command, when called interactively, reports
1820 the number of lines, words, and characters in the region. It is a
1821 superset of the old `count-lines-region', which is now an obsolete
1824 ** The command `just-one-space' (M-SPC), if given a negative argument,
1825 also deletes newlines around point.
1829 *** New option `delete-active-region'.
1830 If non-nil, [delete] and DEL delete the region if it is active and no
1831 prefix argument is given. If set to `kill', those commands kill
1834 *** New command `delete-forward-char', bound to [delete].
1835 This is meant for interactive use, and obeys `delete-active-region'.
1836 The command `delete-char' does not obey `delete-active-region'.
1838 *** `delete-backward-char' is now a Lisp function.
1839 Apart from obeying `delete-active-region', its behavior is unchanged.
1840 However, the byte compiler now warns if it is called from Lisp; Lisp
1841 callers should use delete-char with a negative argument instead.
1843 *** The option `mouse-region-delete-keys' has been deleted.
1845 ** Selection changes.
1847 The default handling of clipboard and primary selections has been
1848 changed to conform with modern X applications. In short, most
1849 commands for killing and yanking text now use the clipboard, while
1850 mouse commands use the primary selection.
1852 In the following, we provide a list of these changes, followed by a
1853 list of steps to get the old behavior back if you prefer that.
1855 *** `select-active-regions' now defaults to t.
1856 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
1857 the kill ring. The selected text is put in the primary selection, if
1858 the system possesses a separate primary selection facility (e.g. X).
1860 **** `select-active-regions' also accepts a new value, `only'.
1861 This means to only set the primary selection for temporarily active
1862 regions (usually made by mouse-dragging or shift-selection);
1863 "ordinary" active regions, such as those made with C-SPC followed by
1864 point motion, do not alter the primary selection.
1866 **** `mouse-drag-copy-region' now defaults to nil.
1868 *** mouse-2 is now bound to `mouse-yank-primary'.
1869 This pastes from the primary selection, ignoring the kill-ring.
1870 Previously, mouse-2 was bound to `mouse-yank-at-click'.
1872 *** `x-select-enable-clipboard' now defaults to t on all platforms.
1874 *** `x-select-enable-primary' now defaults to nil.
1875 Thus, commands that kill text or copy it to the kill-ring (such as
1876 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
1878 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
1879 exactly equivalent to M-w, C-w, and C-y respectively.
1881 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
1882 non-nil by default, as Windows does not support the primary selection
1883 between applications.
1885 *** To return to the previous behavior, do the following:
1887 **** Change `select-active-regions' to nil.
1888 **** Change `mouse-drag-copy-region' to t.
1889 **** Change `x-select-enable-primary' to t (on X only).
1890 **** Change `x-select-enable-clipboard' to nil.
1891 **** Bind `mouse-yank-at-click' to mouse-2.
1893 *** Support for X cut buffers has been removed.
1895 *** X clipboard managers are now supported.
1896 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
1898 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
1899 in the current rectangle. With a prefix argument, this prompts for a
1900 number to count from and for a format string.
1902 ** `redisplay-dont-pause' now defaults to t.
1903 This makes Emacs feel more responsive to editing commands that arrive
1904 at high rate, e.g. if you lean on some key, because stopping redisplay
1905 in the middle (when this variable is nil) forces more expensive
1906 updates later on, and Emacs appears to be unable to keep up.
1908 ** The behavior of <TAB> for active regions in Text mode has changed.
1909 In Text and related modes, typing <TAB> (`indent-for-tab-command')
1910 when the region is active causes Emacs to indent all the lines in the
1911 region, aligning them with the line previous to the first line in the
1912 region (or with the left margin if there is no previous line).
1914 ** When `occur' is called with a prefix argument, matching strings are
1915 collected into the `*Occur*' buffer without line numbers. If there
1916 are parenthesized subexpressions in the specified regexp, `occur'
1917 reads replacement text that may contain \\& and \\N whose convention
1918 follows `replace-match'.
1921 * Changes in Specialized Modes and Packages in Emacs 24.1
1923 ** Archive Mode has basic support for browsing and updating 7z archives.
1927 *** BibTeX mode now supports biblatex.
1928 Use the variable `bibtex-dialect' to select different BibTeX dialects.
1929 `bibtex-entry-field-alist' is now an obsolete alias for
1930 `bibtex-BibTeX-entry-alist'.
1932 *** New command `bibtex-search-entries', bound to C-c C-a.
1934 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
1936 *** New variable `bibtex-search-entry-globally'.
1940 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
1942 *** The default browser used by the package is now the "xdg-open" program,
1943 on platforms that support it. This calls your desktop's preferred browser.
1947 *** Support for musical notes.
1949 *** Support for logarithmic units.
1951 *** No longer uses the tex prefix for TeX specific unit names when
1952 using TeX or LaTeX mode.
1954 *** New option to highlight selections using faces.
1956 *** `calc-histogram' has the option of using a vector to determine the bins.
1958 *** New "O" option prefix.
1960 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
1962 ** Calendar, Diary, and Appt
1964 *** Diary entries can contain non-printing "comments".
1965 See the variable `diary-comment-start'.
1967 *** Appointments can specify their individual warning times.
1968 See the variable `appt-warning-time-regexp'.
1970 *** The function specified by `appt-disp-window-function' may be passed
1971 lists of arguments if multiple appointments are due at similar times.
1972 If you are using a custom function for this, you should update it.
1974 *** New function `diary-hebrew-birthday'.
1976 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
1977 may no longer be nil, but must all be strings.
1979 *** The obsolete (since Emacs 22.1) method of enabling the appt
1980 package by adding `appt-make-list' to `diary-hook' has been removed.
1981 Use `appt-activate' instead.
1983 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
1984 appt-issue-message (use the function appt-activate)
1985 appt-visible/appt-msg-window (use the variable appt-display-format)
1987 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
1988 view-diary-entries, list-diary-entries, show-all-diary-entries
1992 *** New feature to "guess" the style in an existing buffer.
1993 The main entry point is M-x c-guess.
1995 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
1997 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
1998 Thus C-M-a will, by default, go to the beginning of the immediate function,
2001 *** "Macros with semicolons" can be registered for correct indentation.
2002 Where such a macro ends a line (no semicolon) the next statement is no longer
2003 parsed as a statement continuation.
2005 ** Comint and modes derived from it use the standard completion code.
2009 *** Compilation mode can be used without Font Lock mode.
2010 `compilation-parse-errors-function' is now obsolete.
2012 *** New variable `compilation-filter-start', which is bound while
2013 `compilation-filter-hook' runs. It records the start position of the
2014 text inserted by `compilation-filter'.
2016 *** `compilation-error-screen-columns' and `compilation-first-column'
2017 are obeyed in the editing buffer. So programming language modes can
2018 set them, whereas previously only the value in the *Compilation*
2023 *** Customize buffers now contain a search field.
2024 The search is performed using `customize-apropos'.
2025 To turn off the search field, set `custom-search-field' to nil.
2027 *** Options in customize group buffers start out hidden if not customized.
2028 Use the arrow to the left of the option name to toggle visibility.
2030 *** custom-buffer-sort-alphabetically now defaults to t.
2032 *** The color widget now has a "Choose" button, which allows you to
2033 choose a color via `list-colors-display'.
2037 *** It is now possible to access buses other than the default system
2040 *** The `dbus-register-method' and `dbus-register-property' functions
2041 optionally do not register names.
2043 *** The new function `dbus-register-service' registers a known service
2044 name on a D-Bus without also registering a property or a method.
2048 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2049 if called with a prefix argument, read a file name from the minibuffer
2050 instead of using the current buffer.
2052 *** The "dired local variables" feature of Dired-x is obsolete.
2053 The standard directory local variables feature replaces it.
2057 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2058 controlling attempts to autojoin a channel.
2060 *** New variable `erc-coding-system-precedence': If we use `undecided'
2061 as the server coding system, this variable will then be consulted.
2062 The default is to decode strings that can be decoded as utf-8 as
2063 utf-8, and do the normal `undecided' decoding for the rest.
2067 *** The default value of `eshell-directory-name' has changed
2068 to be an "eshell" directory in `user-emacs-directory'.
2069 The old "~/.eshell/" directory is still used if it exists, though.
2073 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2074 It now supports multithread non-stop debugging and simultaneous
2075 debugging of several threads.
2079 *** RET (`image-toggle-animation') toggles animation, if applicable.
2080 Animation plays once, unless the option `image-animate-loop' is non-nil.
2084 *** New command M-x info-display-manual displays a named Info manual.
2085 If that manual is already visited in some Info buffer, it displays
2086 that buffer. (This is handy if you have many manuals in many *info*
2087 buffers, and don't remember the name of the buffer visiting the manual
2088 you want to consult.) Otherwise, it loads and displays the manual.
2090 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2091 This is for compatibility with the stand-alone Info reader program,
2092 and also because `Info-edit' is a rarely used command that is disabled
2095 ** Mail mode changes (not Message mode)
2097 *** New command M-x mail-add-attachment for adding MIME attachments
2099 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2100 (Its name is misleading, since it has nothing to do with MIME
2101 attachments.) The old name is now an obsolete alias to the new name.
2103 ** MH-E has been updated to MH-E version 8.3.1.
2104 See MH-E-NEWS for details.
2106 ** Modula-2 mode provides auto-indentation.
2108 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2110 ** nXML mode no longer binds C-RET to `nxml-complete'.
2111 Completion is now performed via `completion-at-point', bound to C-M-i
2112 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2113 default), this performs tag completion.
2115 ** Org mode has been updated to version 7.8.09.
2116 See ORG-NEWS for details.
2118 ** Prolog mode has been completely revamped, with lots of additional
2119 functionality such as more intelligent indentation, electricity,
2120 support for more variants, including Mercury, and a lot more.
2124 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2125 in the Rmail incoming message.
2127 *** The variable `rmail-message-filter' no longer has any effect.
2128 This change was made in Emacs 23.1 but was not advertised at the time.
2129 Try using `rmail-show-message-hook' instead.
2133 *** M-x shell prompts for the shell path name if the default directory
2134 is a remote file name and neither the environment variable $ESHELL nor
2135 the variable `explicit-shell-file-name' is set.
2137 *** TAB is now bound to the standard `completion-at-point' command,
2138 which now implements the pcomplete rules for shell command completion.
2142 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2143 if the mail server supports them. This uses either built-in GnuTLS
2144 support, or the starttls.el library. Customize `smtpmail-stream-type'
2147 *** The variable `smtpmail-auth-credentials' has been removed.
2148 By default, the information is now stored in the file ~/.authinfo.
2149 This was the default value of smtpmail-auth-credentials. If you had
2150 customized smtpmail-auth-credentials to a list of user names and
2151 passwords, those settings are not used. During your first connection
2152 to the smtp server, Emacs will prompt for the user name and password,
2153 and offer to save them to ~/.authinfo. Or you can manually copy the
2154 credentials to ~/.authinfo. For example, if you had
2156 (setq smtpmail-auth-credentials
2157 '(("mail.example.org" 25 "jim" "s!cret")))
2159 then the equivalent line in ~/.authinfo would be
2161 machine mail.example.org port 25 login jim password s!cret
2163 See the auth-source manual for more information, e.g. on encrypting
2164 the credentials file.
2166 *** The variable `smtpmail-starttls-credentials' has been removed.
2167 If you had that set, you need to put
2169 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2171 in your ~/.authinfo file instead.
2173 *** SMTPmail defaults to using the address in the From: header as the
2174 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2175 to the address you wish to use instead.
2179 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2180 and `sql-oracle-scan-on'.
2182 *** New options controlling prompting for login parameters.
2183 Each supported product has a custom variable `sql-*-login-params',
2184 which is a list of the parameters to be prompted for before a
2185 connection is established.
2187 *** The command `sql-product-interactive' now takes a prefix argument,
2188 which causes it to prompt for an SQL product.
2190 *** Product-specific SQL interactive commands now take prefix arguments.
2191 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2192 given a prefix argument, prompt for a name for the SQL interactive
2193 buffer. This reduces the need for calling `sql-rename-buffer'.
2195 *** SQL interactive modes suppress command continuation prompts, and
2196 replace tabs with spaces. The first change impacts multiple line SQL
2197 statements entered with C-j between each line, statements yanked into
2198 the buffer and statements sent with `sql-send-*' functions. The
2199 second prevents the MySQL and Postgres interpreters from listing
2200 object name completions when sent text via `sql-send-*' functions.
2202 *** New command `sql-connect' starts a predefined SQLi session,
2203 using the login parameters from `sql-connection-alist'.
2205 *** New "Save Connection" menu item in SQLi buffers.
2206 This gathers the login params specified for the SQLi session, if it
2207 was not started by a connection, and saves them as a new connection.
2209 *** New commands for listing database objects and details:
2210 sql-list-all and sql-list-table.
2212 *** An API for manipulating SQL product definitions has been added.
2216 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2220 *** New inline access method "ksu" (kerberized su).
2222 *** The following access methods are discontinued: "ssh1_old",
2223 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2225 *** The user option `remote-file-name-inhibit-cache' controls whether
2226 remote file attributes are cached for better performance.
2228 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2229 default value to "".
2231 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2232 for remote machines which support SELinux.
2234 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2235 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2236 the degree of parallelism.
2238 ** VC and related modes
2240 *** Support for pulling on distributed version control systems.
2241 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2242 supported (currently with Bzr, Git, and Mercurial), to update the
2243 current branch and working tree. A prefix argument means to prompt
2244 the user for specifics, e.g. a pull location.
2246 *** `vc-update' is now an alias for `vc-pull'.
2248 *** Support for merging on distributed version control systems.
2249 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2250 is supported (currently with Bzr, Git, and Mercurial), to merge
2251 changes from another branch into the current one. It prompts for
2252 specifics, e.g. a merge source.
2254 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2255 shows a diff while querying the user. It defaults to t.
2257 *** Log entries in some Log View buffers can be toggled to display a
2258 longer description by typing RET (log-view-toggle-entry-display).
2259 This is currently supported for Bzr, Git, and Mercurial (to support
2260 another backend, define a `log-view-expanded-log-entry-function').
2261 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2262 use this to display the full log entry for the revision at point.
2264 *** New command `vc-ediff' allows visual comparison of two revisions
2265 of a file similar to `vc-diff', but using ediff backend.
2267 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2268 this was not advertised at the time.
2270 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2271 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2272 this was not advertised at the time.
2278 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2280 *** partial-completion-mode (complete.el) is obsolete.
2281 You can get a comparable behavior with:
2282 (setq completion-styles '(partial-completion initials))
2283 (setq completion-pcm-complete-word-inserts-delimiters t)
2285 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2287 *** pgg is obsolete (use EasyPG instead).
2289 *** sregex.el is obsolete, since rx.el is a strict superset.
2291 *** s-region.el and pc-select.el are obsolete.
2292 They are superseded by shift-select-mode, enabled by default since 23.1.
2294 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2298 *** The Landmark game is now invoked with `landmark', not `lm'.
2299 Its functions and variables have been similarly renamed.
2301 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2302 (This interfered with cua-mode.)
2304 *** f90.el has some support for Fortran 2008 syntax.
2306 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2308 *** New command `nato-region' converts text to NATO phonetic alphabet.
2311 * New Modes and Packages in Emacs 24.1
2313 ** Occur Edit mode applies edits made in *Occur* buffers to the
2314 original buffers. It is bound to "e" in Occur mode.
2316 ** New global minor mode electric-pair-mode.
2317 When enabled, typing an open parenthesis automatically inserts the
2318 matching closing one.
2320 ** New global minor mode electric-indent-mode.
2321 When enabled, typing certain characters triggers reindentation.
2322 Major modes wishing to use this can set electric-indent-chars or
2323 electric-indent-functions.
2325 ** New global minor mode electric-layout-mode.
2326 When enabled, typing certain characters automatically inserts newlines.
2327 Major modes wishing to use this can set electric-layout-rules.
2329 ** tabulated-list.el provides a generic major mode for tabulated data,
2330 from which other modes can be derived.
2332 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2334 ** secrets.el is an implementation of the Secret Service API, an
2335 interface to password managers like GNOME Keyring or KDE Wallet. The
2336 Secret Service API requires D-Bus for communication. The command
2337 `secrets-show-secrets' offers a buffer with a visualization of the
2340 ** notifications.el provides an implementation of the Desktop
2341 Notifications API. It requires D-Bus for communication.
2343 ** soap-client.el supports access to SOAP web services from Emacs.
2344 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2346 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
2348 ** New emacs-lock.el package.
2349 The previous version has been moved to obsolete/old-emacs-lock.el.
2350 Now, there is a proper minor mode `emacs-lock-mode'. Protection
2351 against exiting Emacs and killing the buffer can be set separately.
2352 The mechanism for automatically turning off protection for buffers
2353 with dead inferior processes has been generalized.
2356 * Incompatible Lisp Changes in Emacs 24.1
2358 ** Passing a nil argument to a minor mode function call now ENABLES
2359 the minor mode unconditionally. This is so that you can write e.g.
2361 (add-hook 'text-mode-hook 'foo-mode)
2363 to enable foo-mode in Text mode buffers, removing the need for
2364 `turn-on-foo-mode' style functions. This affects all mode commands
2365 defined by `define-minor-mode'. If called interactively, the mode
2366 command still toggles the minor mode.
2368 ** The return value of `backup-buffer' has changed.
2369 It is now a list of three elements, where the second element is a list
2370 describing the original file's SELinux context. If Emacs or the
2371 system lacks SELinux support, the context list is (nil nil nil nil).
2372 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
2374 ** `char-direction-table' and the `char-direction' function were deleted.
2375 They were buggy and inferior to the new support of bidirectional
2376 editing introduced in Emacs 24. If you need the bidirectional
2377 properties of a character, use `get-char-code-property' with the last
2378 argument `bidi-class'.
2380 ** `copy-directory' now copies the source directory as a subdirectory
2381 of the target directory, if the latter is an existing directory. The
2382 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2383 the contents directly into a pre-existing target directory.
2385 ** For mouse click input events in the text area, the Y pixel
2386 coordinate in the POSITION list now counts from the top of the text
2387 area, excluding any header line. Previously, it counted from the top
2390 ** Support for "old-style" backquotes, obsolete for 10+ years, has
2391 been further reduced. Now a backquote not followed by a space is
2392 always treated as a "new-style" backquote. Please remove all
2393 "old-style" backquotes from your code. If your code uses backquotes
2394 as documented in the Elisp manual, and compiles without warning, then
2395 you have nothing to do in this regard. Code not following the
2396 appropriate conventions may fail to compile.
2398 The most common cause of trouble seems to be an old-style backquote
2399 followed by a newline. Another cause of trouble is vector notation
2400 for key sequence notation: instead of [(control ,)] and [(control ')],
2401 you should write [(control ?,)] and [(control ?')], which will work in
2404 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2405 was not advertised at the time. The function `custom-initialize-delay'
2406 replaced all known uses.
2408 ** `view-buffer' now treats special mode-class in the same way that
2409 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2410 major mode is special).
2412 ** Menu and tool bar changes
2414 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
2415 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2416 With these alist entries omitted, `make-frame' checks the value of the
2417 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2418 a menu-bar or tool-bar, respectively. If the alist entries are added,
2419 they override the value of `menu-bar-mode'/`tool-bar-mode'.
2421 *** The menu bar bindings's caches are not used any more.
2422 Use (where-is-internal <def> nil t) instead.
2424 ** Regions created by mouse dragging are now normal active regions,
2425 similar to those created by shift-selection (see Selection changes
2426 above). In previous Emacs versions, these regions were delineated by
2427 `mouse-drag-overlay'; that variable has been removed.
2429 ** The fourth argument of `filter-buffer-substring' has been removed.
2430 If you want to remove text properties from the final result, simply
2431 pass the result through substring-no-properties.
2433 ** cl.el no longer provides `cl-19'.
2435 ** The following obsolete functions and aliases have been removed
2436 (the appropriate new function is given in parentheses; "not needed"
2437 means you can just remove all calls to the function in question):
2439 *** `comint-kill-output' (`comint-delete-output')
2440 *** `decompose-composite-char' (`char-to-string')
2441 *** `outline-visible' (`outline-invisible-p')
2442 *** `internal-find-face' (`facep')
2443 *** `internal-get-face' (`facep and check-face')
2444 *** `frame-update-faces' (not needed)
2445 *** `frame-update-face-colors' (`frame-set-background-mode')
2446 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2447 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2448 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2449 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2450 *** `x-make-font-unbold' (`make-face-unbold')
2451 *** `x-make-font-unitalic' (`make-face-unitalic')
2452 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2453 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2454 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2455 *** `char-bytes' (== 1)
2456 *** `isearch-return-char' (`isearch-printing-char')
2457 *** `make-local-hook' (not needed)
2458 *** `set-screen-height' (`set-frame-height')
2459 *** `set-screen-width' (`set-frame-width')
2461 ** The following obsolete variables and varaliases have been removed
2462 (the appropriate new variable is given in parentheses):
2464 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2465 *** `vc-header-alist' (`vc-BACKEND-header')
2466 *** `directory-sep-char' (== ?/)
2467 *** `font-lock-defaults-alist' (`font-lock-defaults')
2468 *** `e' (`float-e').
2470 ** The following obsolete files were removed:
2471 sc.el, x-menu.el, rnews.el, rnewspost.el
2473 ** The format of the finder-inf.el file has changed, since the Finder
2474 mechanism is now based on the package system. The variable
2475 `finder-package-info' is replaced by `package--builtins' and
2476 `finder-keywords-hash'.
2478 ** When generating autoloads, `update-directory-autoloads' no longer
2479 assumes every inspected file is in your `load-path'. It instead
2480 generates relative names according to the current `load-path'.
2483 * Lisp Changes in Emacs 24.1
2485 ** Code can now use lexical scoping by default instead of dynamic scoping.
2486 The `lexical-binding' variable enables lexical scoping for local
2487 variables. It is typically set via a file-local variable in the first
2488 line of the file, in which case it applies to all the code in that
2491 *** `eval' takes a new optional argument `lexical' to choose the new lexical
2492 binding instead of the old dynamic binding mode.
2494 *** Lexically scoped interpreted functions are represented with a new form
2495 of function value which looks like (closure ENV ARGS &rest BODY).
2497 *** New macro `letrec' to define recursive local functions.
2499 *** `defvar' and `defconst' now mark the variable as special (dynamic).
2500 So do `defcustom' and other forms that call `defvar' as a subroutine.
2502 *** New function `special-variable-p' to check whether a variable is
2503 declared as dynamically bound.
2505 *** The form ((lambda ...) ...) is deprecated.
2507 ** An Emacs Lisp testing tool is now included.
2508 Emacs Lisp developers can use this tool to write automated tests for
2509 their code. See the ERT info manual for details.
2511 ** Changes for bidirectional display and editing
2513 *** New function `current-bidi-paragraph-direction'.
2514 This returns the base direction of the paragraph at point.
2516 *** New function `bidi-string-mark-left-to-right'.
2517 Given a string containing characters from right-to-left scripts, this
2518 function returns another string which can be safely inserted into a
2519 buffer, such that any following text will be always displayed to the
2520 right of that string. (This works by appending an invisible Unicode
2521 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
2523 This is useful when the buffer has overall left-to-right paragraph
2524 direction and you need to insert a string whose contents are not known
2525 in advance, without disrupting the layout of the line.
2529 *** Window tree functions are accessible in Elisp.
2530 Functions are provided to return the parent, siblings or child windows
2531 of any window including internal windows (windows not associated with a
2532 buffer) in the window tree.
2534 **** New function `window-valid-p' gives non-nil for live and internal
2537 **** Window manipulation can deal with internal windows.
2538 Many window handling functions like `split-window', `delete-window', or
2539 `delete-other-windows' as well as the window resizing functions can now
2540 act on any window including internal ones.
2542 *** window-total-height/-width vs window-body-height/-width.
2543 The function `window-height' has been renamed to `window-total-height'
2544 and `window-width' has been renamed to `window-body-width'. The old
2545 names are provided as aliases. Two new functions `window-total-width'
2546 and `window-body-height' are provided.
2548 *** Window parameters specific to window handling functions.
2549 For each window you can specify a parameter to override the default
2550 behavior of a number of functions like `split-window', `delete-window'
2551 and `delete-other-windows'. The variable `ignore-window-parameters'
2552 allows to ignore processing such parameters.
2554 *** New semantics of third argument of `split-window'.
2555 The third argument of `split-window' has been renamed to SIDE and can be
2556 set to any of the values 'below, 'right, 'above, or 'left to make the
2557 new window appear on the corresponding side of the window that shall be
2558 split. Any other value of SIDE will cause `split-window' to split the
2559 window into two side-by-side windows as before.
2561 *** Window resizing functions.
2562 A new standard function for resizing windows called `window-resize' has
2563 been introduced. This and all other functions for resizing windows no
2564 longer delete any windows when they become too small.
2566 *** Deleting the selected window now selects the most recently selected
2567 live window on that frame instead.
2569 *** `adjust-window-trailing-edge' adjustments.
2570 `adjust-window-trailing-edge' can now deal with fixed-size windows and
2571 is able to resize other windows if a window adjacent to the trailing
2572 edge cannot be shrunk any more. This makes its behavior more similar to
2573 that of Emacs 21 without compromising, however, its inability to delete
2574 windows which was introduced in Emacs 22.
2576 *** Window-local buffer lists.
2577 Windows now have local buffer lists. This means that removing a buffer
2578 from display in a window will preferably show the buffer previously
2579 shown in that window with its previous window-start and window-point
2580 positions. This also means that the same buffer may be automatically
2581 shown twice even if it already appears in another window.
2583 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2584 which if non-nil requires the buffer to be displayed in the currently
2585 selected window, signaling an error otherwise. If nil, another window
2586 can be used, e.g. if the selected one is strongly dedicated.
2588 *** `split-window-vertically' and `split-window-horizontally' renamed
2589 to `split-window-below' and `split-window-right' respectively.
2590 The old names are kept as aliases.
2594 **** The second arg to `display-buffer' and `pop-to-buffer' is now
2595 named ACTION, and takes a display action of the same form as
2596 `display-buffer-base-action' (see Changes, above). A non-nil,
2597 non-list value is treated specially, as the old meaning.
2599 **** New variable `display-buffer-overriding-action'.
2601 **** The procedure of `display-buffer' etc. to choose a window is
2602 determined by combining `display-buffer-overriding-action',
2603 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2604 and `display-buffer-fallback-action'. The second and fourth of these
2605 are user-customizable variables.
2607 See the docstring of `display-buffer' for details.
2609 *** New functions `window-state-get' and `window-state-put'.
2610 These functions allow to save and restore the state of an arbitrary
2611 frame or window as an Elisp object.
2615 *** New variable `completion-extra-properties' used to specify extra
2616 properties of the current completion:
2617 - :annotate-function, same as the old completion-annotate-function.
2618 - :exit-function, function to call after completion took place.
2620 *** Functions on `completion-at-point-functions' can return any of the
2621 properties valid for `completion-extra-properties'.
2623 *** `completion-annotate-function' is obsolete.
2625 *** New `metadata' method for completion tables. The metadata thus returned
2626 can specify various details of the data returned by `all-completions':
2627 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
2628 used to select a style in completion-category-overrides.
2629 - `annotation-function' to add annotations in *Completions*.
2630 - `display-sort-function' to specify how to sort entries in *Completions*.
2631 - `cycle-sort-function' to specify how to sort entries when cycling.
2633 *** `minibuffer-local-filename-must-match-map' is not used any more.
2634 Instead, the bindings in `minibuffer-local-filename-completion-map'
2635 are combined with `minibuffer-local-must-match-map'.
2637 *** New variable `completing-read-function' allows overriding the
2638 behavior of `completing-read'.
2640 ** `glyphless-char-display' can now distinguish between graphical and
2641 text terminal display, via a char-table entry that is a cons cell.
2643 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
2644 Instead, the offending function is removed.
2648 *** New function `run-hook-wrapped' for running an abnormal hook by
2649 passing the hook functions as arguments to a "wrapping" function.
2650 Like `run-hook-with-args-until-success', it stops at the first
2651 non-nil return value.
2653 *** New macro `with-wrapper-hook' for running an abnormal hook as a
2654 set of "wrapping" filters, similar to around advice.
2655 (A version of this macro was actually added in Emacs 23.2 but was not
2656 advertised at the time.)
2660 *** New macro `condition-case-unless-debug' (this was actually added in
2661 Emacs 23.1 as condition-case-no-debug, but not advertised)
2663 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
2665 *** Variable `stack-trace-on-error' removed.
2667 *** The debugger can now "continue" from an error, which means it will
2668 jump to the error handler as if the debugger had not been invoked
2669 instead of jumping all the way to the top-level.
2671 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
2672 This can be useful when `inhibit-quit' is set.
2674 ** The new function `server-eval-at' allows evaluation of Lisp forms on
2675 named Emacs server instances.
2677 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
2678 to redirect STDOUT to a file.
2680 ** The function `format-time-string' now supports the %N directive,
2681 for higher-resolution time stamps.
2683 ** New input reading functions
2685 *** New function `read-char-choice' reads a restricted set of
2686 characters, discarding any inputs not inside the set.
2688 *** The command `read-color' now requires a match for a color name
2689 or RGB triplet, instead of signaling an error if the user provides
2692 **** `facemenu-read-color' is now an alias for `read-color'.
2694 ** `image-library-alist' is renamed to `dynamic-library-alist'.
2695 The variable is now used to load all kind of supported dynamic libraries,
2696 not just image libraries. The previous name is still available as an
2699 ** Syntax parsing changes
2701 *** New variable `syntax-propertize-function'.
2702 This replaces `font-lock-syntactic-keywords' which is now obsolete.
2703 This allows syntax-table properties to be set independently from font-lock:
2704 just call syntax-propertize to make sure the text is propertized.
2705 Together with this new variable come a new hook
2706 syntax-propertize-extend-region-functions, as well as two helper functions:
2707 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
2708 as-is; and syntax-propertize-rules which provides a new way to specify
2711 *** Syntax tables support a new "comment style c" additionally to style b.
2713 ** New hook `post-self-insert-hook', run after `self-insert-command'.
2715 ** frame-local variables cannot be let-bound any more.
2717 ** Major and minor mode changes
2719 *** `set-auto-mode' now respects mode: local variables at the end of files,
2720 as well as those in the -*- line.
2722 *** `prog-mode' is a new major mode from which programming modes
2725 **** `prog-mode-hook' can be used to enable features for programming
2726 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
2727 on-the-fly spell checking for comments and strings.
2729 *** New hook `change-major-mode-after-body-hook', run by
2730 `run-mode-hooks' just before any other mode hooks.
2732 *** Enabled globalized minor modes can be disabled in specific major modes.
2733 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
2734 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
2736 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
2738 ** File-handling changes
2740 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
2741 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
2742 both non-nil. Interactively, TRASH defaults to t, unless a prefix
2743 argument is supplied (see Trash changes, above).
2745 *** New file predicates: `file-equal-p', `file-in-directory-p'.
2747 ** Tool-bars can display separators.
2748 Tool-bar separators are handled like menu separators in menu-bar maps,
2749 i.e. via menu entries of the form `(menu-item "--")'.
2753 *** Animated images support (currently animated gifs only).
2755 **** `image-animated-p' returns non-nil if an image can be animated.
2757 **** `image-animate' animates a supplied image spec.
2759 **** `image-animate-timer' returns the timer object for an image that
2762 *** `image-extension-data' has been renamed to `image-metadata'.
2763 The old name is an obsolete alias to the new one.
2765 *** Image mode can view any image type that ImageMagick supports.
2766 This requires Emacs to be built with ImageMagick support.
2768 **** New function `imagemagick-types', defined if ImageMagick support
2769 is enabled, returns a list of image file extensions that your
2770 ImageMagick installation supports.
2772 **** New function `imagemagick-register-types' enables ImageMagick
2773 image types in Image mode and in `create-image' and other helper
2776 **** New option `imagemagick-types-inhibit' excludes certain
2777 ImageMagick image types from `imagemagick-register-types'.
2779 **** With ImageMagick support, there are extra Image mode commands to
2780 resize and rotate images: `image-transform-fit-to-height',
2781 `image-transform-fit-to-width', `image-transform-set-rotation', and
2782 `image-transform-set-scale'.
2784 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
2785 passes it to the mail user agent function. This argument specifies an
2786 action for returning to the caller after finishing with the mail. For
2787 example, this is used by Rmail to optionally delete a mail window.
2789 ** XML and HTML parsing
2790 If Emacs is compiled with libxml2 support, there are two new
2791 functions: `libxml-parse-html-region' (which parses "real world" HTML)
2792 and `libxml-parse-xml-region' (which parses XML). Both return an
2793 Emacs Lisp parse tree.
2795 ** Networking and encryption changes
2797 *** `open-network-stream' can now be used to open an encrypted stream.
2798 It now accepts an optional `:type' parameter for initiating a TLS
2799 connection, directly or via STARTTLS. To do STARTTLS, additional
2800 parameters (`:end-of-command', `:success', `:capabilities-command')
2801 must also be supplied.
2803 *** New library gnutls.el.
2804 The new function `gnutls-available-p' returns non-nil if Emacs is
2805 built with GnuTLS support. The main entry points are
2806 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
2807 these functions through `open-network-stream', because that can
2808 upgrade connections through STARTTLS opportunistically or use plain
2809 SSL, depending on your needs. For debugging, set `gnutls-log-level'
2812 *** New primitive `secure-hash' that supports many secure hash algorithms:
2813 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
2814 sha1.el has been removed. The `sha1' feature is provided by default.
2818 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
2820 ** Progress reporters can now "spin".
2821 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
2822 now be nil, or omitted. This makes a "non-numeric" reporter. Each
2823 time you call `progress-reporter-update' on that progress reporter,
2824 with a nil or omitted VALUE argument, the reporter message is
2825 displayed with a "spinning bar".
2827 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
2828 being reverted, even if the buffer has a local `revert-buffer-function'.
2830 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
2831 If delayed-warnings-list is non-nil, the command loop calls
2832 `delayed-warnings-hook' after `post-command-hook'. At present, this
2833 is only used by Emacs on some platforms to display warnings during
2834 startup, which might otherwise not be noticed. This uses the
2835 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
2837 ** rx.el has a new `group-n' construct for explicitly numbered groups.
2839 ** New function `make-composed-keymap' that constructs a new keymap
2840 from multiple input maps. You can use this to make a keymap that
2841 inherits from multiple maps, eg:
2842 (set-keymap-parent newmap (make-composed-keymap othermap parent))
2844 ** New function `string-prefix-p'.
2845 (This was actually added in Emacs 23.2 but was not advertised at the time.)
2847 ** New reader macro ## that stands for the empty symbol.
2848 This means that the empty symbol can now be read back. Also, #: by itself
2849 (when not immediately followed by a possible symbol character) stands for
2850 an empty uninterned symbol.
2852 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
2854 ** The following functions and variables are obsolete:
2856 *** `tooltip-use-echo-area' is obsolete.
2857 Rather than setting this to t, disable Tooltip mode instead.
2859 *** buffer-substring-filters is obsolete.
2860 Use `filter-buffer-substring-functions' instead.
2862 *** `byte-compile-disable-print-circle' is obsolete.
2864 *** `deferred-action-list' and `deferred-action-function' are obsolete.
2865 Use `post-command-hook' instead.
2867 *** `font-lock-maximum-size' is obsolete.
2870 * Changes in Emacs 24.1 on Non-Free Operating Systems
2872 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
2873 and also when HOME is set to C:\ by default.
2875 ** New configure.bat options
2877 *** --enable-checking builds Emacs with extra runtime checks.
2879 *** --distfiles specifies files to be included in binary distribution.
2881 *** --without-gnutls disables automatic GnuTLS detection.
2883 *** --lib for general library linkage, works with the USER_LIBS build variable.
2885 ** New make target `dist' to create binary distribution for MS Windows.
2887 ** The Lisp function `w32-default-color-map' is now obsolete.
2888 (It is only used internally in the Emacs C code.)
2890 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
2891 reappear on mouse-over. (Requires OS X 10.6 or later.)
2893 ** On Mac OS X, dragging a file into Emacs visits the file, like on
2894 other platforms, rather than inserting its contents into the buffer.
2897 ----------------------------------------------------------------------
2898 This file is part of GNU Emacs.
2900 GNU Emacs is free software: you can redistribute it and/or modify
2901 it under the terms of the GNU General Public License as published by
2902 the Free Software Foundation, either version 3 of the License, or
2903 (at your option) any later version.
2905 GNU Emacs is distributed in the hope that it will be useful,
2906 but WITHOUT ANY WARRANTY; without even the implied warranty of
2907 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2908 GNU General Public License for more details.
2910 You should have received a copy of the GNU General Public License
2911 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2916 paragraph-separate: "[
\f]*$"