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).
78 ** In compiled Lisp files, the header no longer includes a timestamp.
81 * Editing Changes in Emacs 24.4
83 ** `split-window' is no longer a command, just a non-interactive function.
84 As a command it was a special case of `split-window-below', and as such
85 superfluous. After being reimplemented in Lisp, its interactive form
86 was mistakenly retained.
88 ** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
89 bound to <f11> and M-<f10>, respectively.
91 ** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
94 ** New command `kmacro-to-register' to store keyboard macros in registers.
98 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
99 You can pick the name of the function and the variables with `C-x 4 a'.
102 * Changes in Specialized Modes and Packages in Emacs 24.4
104 ** `remember' can now store notes in separates files
105 You can use the new function `remember-store-in-files' within the
106 `remember-handler-functions' option.
108 See `remember-data-directory' and `remember-directory-file-name-format'
109 for new options related to this function.
110 ** `ido-decorations' has been slightly extended to give a bit more control.
112 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
114 ~/.emacs.d/timelog replaces ~/.timelog
115 ~/.emacs.d/todo-do replaces ~/.todo-do
116 ~/.emacs.d/todo-done replaces ~/.todo-done
117 ~/.emacs.d/todo-top replaces ~/.todo-top
118 ~/.emacs.d/vip replaces ~/.vip
119 ~/.emacs.d/viper replaces ~/.viper
120 ~/.emacs.d/ido.last replaces ~/.ido.last
121 ~/.emacs.d/kkcrc replaces ~/.kkcrc
122 ~/.emacs.d/quickurls replaces ~/.quickurls
123 ~/.emacs.d/idlwave replaces ~/.idlwave
124 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
125 ~/.emacs.d/places replaces ~/.emacs-places
126 ~/.emacs.d/shadows replaces ~/.shadows
127 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
128 ~/.emacs.d/strokes replaces ~/.strokes
129 ~/.emacs.d/notes replaces ~/.notes
130 ~/.emacs.d/type-break replaces ~/.type-break
132 ** Delphi mode is now called OPascal mode.
133 *** All delphi-* variables and functions have been renamed to opascal-*.
134 *** `delphi-newline-always-indents' is not supported any more
135 use `electric-indent-mode' instead.
136 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
138 ** Eldoc Mode works properly in the minibuffer.
140 ** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
142 ** completing-read-multiple's separator can now be a regexp.
143 The default separator is changed to allow surrounding spaces around the comma.
147 *** Battery information via the BSD `apm' utility is now supported.
151 *** New macro cl-tagbody.
154 *** letf is now just an alias for cl-letf.
158 *** Calc by default now uses the Gregorian calendar for all dates, and
159 uses January 1, 1 AD as its day number 1. Previously Calc used the
160 Julian calendar for dates before September 14, 1752, and it used
161 December 31, 1 BC as its day number 1; the new scheme is more
162 consistent with Calendar's calendrical system and day numbering.
164 *** The new variable `calc-gregorian-switch' lets you configure the
165 date when Calc switches from the Julian to the Gregorian calendar.
166 Nil, the default value, means to always use the Gregorian calendar.
167 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
170 *** Support for ISO 8601 dates.
174 *** New minor mode `dired-hide-details-mode' hides details.
178 *** New option `erc-accidental-paste-threshold-seconds'.
179 If set to a number, this can be used to avoid accidentally paste large
180 amounts of data into the ERC input.
182 ** Icomplete is a bit more like IDO.
183 *** key bindings to navigate through and select the completions.
184 *** The icomplete-separator is customizable, and its default has changed.
185 *** Removed icomplete-show-key-bindings.
189 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
190 visit the next image file and the previous image file in the same
191 directory, respectively.
193 *** New commands to show specific frames of multi-frame images.
194 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
195 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
198 *** The command `image-mode-fit-frame' deletes other windows.
199 When toggling, it restores the frame's previous window configuration.
200 It also has an optional frame argument, which can be used by Lisp
201 callers to fit the image to a frame other than the selected frame.
205 *** New face `info-index-match' is used to highlight matches in index
206 entries displayed by `Info-index-next', `Info-virtual-index' and
211 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
212 and adds it to the search string.
214 ** MH-E has been updated to MH-E version 8.5.
215 See MH-E-NEWS for details.
218 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
219 Customize `unrmail-mbox-format' to change this.
222 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
223 of how Rmail displays non-MIME messages.
226 ** New function `ses-rename-cell' to give SES cells arbitrary names.
228 ** trace-function was largely rewritten.
229 New features include:
230 - no prompting for the destination buffer, unless a prefix-arg was used.
231 - additionally to prompting for a destination buffer, when a prefix-arg is
232 used, the user can enter a "context", i.e. Lisp expression whose value at the
233 time the function is entered/exited will be printed along with the function
234 name and arguments. Useful to trace the value of (current-buffer) or
235 (point) when the function is invoked.
237 ** New command `delete-duplicate-lines' has two types of operation:
238 when its arg ADJACENT is non-nil (when called interactively with C-u C-u)
239 it works like the utility `uniq'. Otherwise by default it deletes
240 duplicate lines everywhere in the region without regard to adjacency.
242 ** New `cycle-spacing' command allows cycling between having just one
243 space, no spaces, or reverting to the original spacing. Like
244 `just-one-space' command it can handle or ignore newlines and
245 leave different number of spaces.
250 *** New connection method "adb", which allows to access Android
251 devices by the Android Debug Bridge. The variable `tramp-adb-program'
252 can be used to adapt the path of the "adb" program, if needed.
254 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
255 "scpc" and "rsyncc" are discontinued. The ssh option
256 "ControlMaster=auto" is set automatically in all ssh-based methods,
260 *** Handlers for `file-acl' and `set-file-acl' for remote machines
261 which support POSIX ACLs.
265 *** The commands `woman-default-faces' and `woman-monochrome-faces'
266 are obsolete. Customize the `woman-* faces instead.
270 *** Added Eshell-TRAMP module
271 External su and sudo commands are now the default; the internal,
272 TRAMP-using variants can still be used by enabling the eshell-tramp
275 ** Obsolete packages:
277 *** longlines.el is obsolete; use visual-line-mode instead.
279 *** terminal.el is obsolete; use term.el instead.
282 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
285 *** The Info-edit command is obsolete. Editing Info nodes by hand
286 has not been relevant for some time.
289 * New Modes and Packages in Emacs 24.4
290 ** New `superword-mode' in subword.el
291 `superword-mode' overrides the default word motion commands to treat
292 symbol_words as a single word, similar to what `subword-mode' does and
293 using the same internal functions.
295 ** New nadvice.el package offering lighter-weight advice facilities.
297 - add-function/remove-function which can be used to add/remove code on any
298 function-carrying place, such as process-filters or `<foo>-function' hooks.
299 - advice-add/advice-remove to add/remove a piece of advice on a named function,
300 much like `defadvice' does.
303 * Incompatible Lisp Changes in Emacs 24.4
305 ** `read-event' does not return decoded chars in ttys any more.
306 Just as was the case in Emacs-22 and before, decoding of tty input according to
307 keyboard-coding-system is not performed in read-event any more. But contrary
308 to that past, it is still done before input-decode-map/function-key-map/...
310 ** Removed inhibit-local-menu-bar-menus.
312 ** frame-local variables that affect redisplay do not work any more.
313 More specifically, the redisplay does not bother to check for a frame-local
314 value when looking up variables.
316 ** nil and "unbound" are indistinguishable in symbol-function.
317 `symbol-function' never signals `void-function' any more.
318 `fboundp' returns non-nil if the symbol was `fset' to nil.
320 ** `defadvice' does not honor the `freeze' flag and cannot advise
321 special-forms any more.
323 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
324 VAR was bound to nil which was not tremendously useful and just lead to
325 spurious warnings about an unused var.
327 ** The return value of `backup-buffer' has changed.
328 The second argument is no longer an SELinux context, instead it is an
329 alist of extended attributes as returned by the new function
330 `file-extended-attributes'. The attributes can be applied to another
331 file using `set-file-extended-attributes'.
334 * Lisp Changes in Emacs 24.4
336 ** Obsoleted functions:
338 *** `lisp-complete-symbol'
340 *** `minibuffer-completion-contents'
342 ** `with-wrapper-hook' is obsoleted by `add-function'.
343 The few hooks that used with-wrapper-hook are replaced as follows:
344 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
345 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
346 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
349 ** `get-upcase-table' is obsoleted by the new `case-table-get-table'.
351 ** Support for filesystem notifications.
352 Emacs now supports notifications of filesystem changes, such as
353 creation, modification, and deletion of files. This requires the
354 'inotify' API on GNU/Linux systems. On MS-Windows systems, this is
355 supported for Windows XP and newer versions.
357 ** Changes in autorevert.el
360 *** If Emacs is compiled with file notification support, notifications
361 are used instead of checking the time stamp of the files. You can
362 disable this by setting the user option `auto-revert-use-notify' to
363 nil. Alternatively, a regular expression of directories to be
364 excluded from file notifications can be specified by
365 `auto-revert-notify-exclude-dir-regexp'.
368 *** The new user option `auto-revert-remote-files' enables reversion
369 of remote files when set to non-nil.
373 *** The `face-spec-set' is now analogous to `setq' for face specs.
374 Its third arg now accepts values specifying exactly which face spec to
375 set (defface, custom, or user spec), and it directly sets the relevant
376 property using the supplied face spec.
378 *** Face specs set via Custom themes now replace the `defface' spec
379 rather than inheriting from it (as do face specs set via Customize).
381 *** New face characteristic (supports :underline (:style wave))
382 specifies whether or not the terminal can display a wavy line.
387 *** `image-animated-p' is now `image-multi-frame-p'.
388 It returns non-nil for any image that contains multiple frames,
389 whether or not it specifies a frame delay.
392 *** When animating images that do not specify a frame delay,
393 Emacs uses `image-default-frame-delay'.
396 *** New functions `image-current-frame' and `image-show-frame' for getting
397 and setting the current frame of a multi-frame image.
399 ** time-to-seconds is not obsolete any more.
400 ** New function special-form-p.
401 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
402 text-property on the first char.
404 ** The `defalias-fset-function' property lets you catch calls to defalias
405 and redirect them to your own function instead of `fset'.
407 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
408 When you edit DIR/FILE, Emacs normally creates a symbolic link
409 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
410 is being edited. Formerly, if there was already a non-symlink file
411 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
412 through DIR/.#FILE.9. These fallbacks have been removed, so that
413 Emacs now no longer locks DIR/FILE in that case.
415 On file systems that do not support symbolic links, the lock is now a
416 regular file with contents being what would have been in the symlink.
418 ** The 9th element returned by `file-attributes' is now unspecified.
419 Formerly, it was t if the file's gid would change if file were deleted
420 and recreated. This value has been inaccurate for years on many
421 platforms, and nobody seems to have noticed or cared.
423 ** The function `file-ownership-preserved-p' now has an optional
424 argument GROUP which causes it check for file group too. This can be
425 used in place of the 9th element of `file-attributes'.
427 ** New functions `group-gid' and `group-real-gid'.
429 ** The 6th argument to `copy-file' has been renamed to
430 `preserve-extended-attributes' as it now handles both SELinux context
433 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
435 *** The package descriptor and name of global variables, constants,
436 and functions should be separated by two hyphens if the symbol is not
437 meant to be used by other packages.
440 * Changes in Emacs 24.4 on Non-Free Operating Systems
443 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
444 The backtrace is written to the 'emacs_backtrace.txt' file in the
445 directory where Emacs was running.
448 ** The variable `buffer-file-type' is no longer supported.
449 Setting it has no effect, and %t in the mode-line format is ignored.
450 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
451 modifying it has no effect.
454 ** Lock files now work on MS-Windows.
455 This allows to avoid losing your edits if the same file is being
456 edited in another Emacs session or by another user. See the node
457 "Interlocking" in the Emacs User Manual for the details. To disable
458 file locking, customize `create-lockfiles' to nil.
460 ** Improved fullscreen support on Mac OS X.
461 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
462 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
463 native is the default.
466 * Installation Changes in Emacs 24.3
468 ** The default X toolkit is now Gtk+ version 3.
469 If you don't pass `--with-x-toolkit' to configure, or if you use
470 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
471 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
472 You can explicitly require a specific version by passing
473 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
475 ** New configure option `--enable-link-time-optimization', to utilize
476 an appropriate feature provided by GCC since version 4.5.0.
478 ** New configure option `--without-all' to disable most of the optional
479 features (image support, etc.) that are normally enabled by default.
481 ** New configure option `--enable-gcc-warnings' (for developing/debugging
482 Emacs). If building with GCC, this enables compile-time checks that
483 warn/give errors about possibly-questionable C code. On a recent GNU
484 system there should be no warnings; on older and on non-GNU systems
485 the results may be useful to developers.
487 ** The configure option `--enable-use-lisp-union-type' has been
488 renamed to `--enable-check-lisp-object-type', as the resulting
489 Lisp_Object type no longer uses a union to implement the compile time
490 check that this option enables.
492 ** The configure option `--disable-maintainer-mode' has been removed,
493 as it was confusingly-named and rarely useful.
495 ** The configure options `--program-prefix', `--program-suffix', and
496 `--program-transform-name' apply to more than just the installed
497 binaries. Now they also affect the man pages, icons, and the
498 etc/emacs.desktop file; but not the info pages, since this would break
499 links between the various manuals.
501 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
502 overwriting "emacs" in the installation bin/ directory with a link
505 ** Emacs uses libtinfo in preference to libncurses, if available.
507 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
508 /usr/pkg/lib to the linker search path. You must add them yourself if
511 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
512 (from the bin and libexec directories, respectively). The former is
513 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
516 * Startup Changes in Emacs 24.3
518 ** Emacs no longer searches for `leim-list.el' files beneath the standard
519 lisp/ directory. There should not be any there anyway. If you have
520 been adding them there, put them somewhere else; e.g., site-lisp.
522 ** The `--no-site-lisp' command line option now works for Nextstep builds.
525 * Changes in Emacs 24.3
529 *** `C-h f' (`describe-function') can now perform autoloading.
530 When this command is called for an autoloaded function whose docstring
531 contains a key substitution construct, that function's library is
532 automatically loaded, so that the documentation can be shown
533 correctly. To disable this, set `help-enable-auto-load' to nil.
535 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
536 even after their associated libraries have been loaded (and the
537 autoloads have been redefined as functions).
541 *** Images displayed via ImageMagick now support transparency and the
542 :background image specification property.
544 *** When available, ImageMagick support is automatically enabled.
545 It is no longer necessary to call `imagemagick-register-types'
546 explicitly to install ImageMagick image types; that function is called
547 automatically at startup, or when customizing an imagemagick- option.
549 *** Setting `imagemagick-types-inhibit' to t now disables the use of
550 ImageMagick to view images. (You must call `imagemagick-register-types'
551 afterwards if you do not use customize to change this.)
553 *** The new variable `imagemagick-enabled-types' also affects which
554 ImageMagick types are treated as images. The function
555 `imagemagick-filter-types' returns the list of types that will be
560 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
561 next and previous path separator, respectively.
563 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
564 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
565 non-nil before enabling the mode.
569 *** New option `mode-line-default-help-echo' specifies the help text
570 (shown in a tooltip or in the echo area) for any part of the mode line
571 that does not have its own specialized help text.
573 *** You can now click mouse-3 in the coding system indicator to invoke
574 `set-buffer-file-coding-system'.
578 *** emacsclient now obeys string values for `initial-buffer-choice',
579 if it is told to open a new frame without specifying any file to visit
580 or expression to evaluate.
582 *** New option `server-auth-key' specifies a shared server key.
584 ** Emacs now generates backtraces on fatal errors.
585 On encountering a fatal error, Emacs now outputs a textual description
586 of the fatal signal, and a short backtrace on platforms like glibc
587 that support backtraces.
589 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
590 This minor mode replaces `toggle-read-only', which is now obsolete.
592 ** Most `y-or-n' prompts now allow you to scroll the selected window.
593 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
594 respectively, without exiting from the prompt.
596 ** In the Package Menu, newly-available packages are listed as "new",
597 and sorted above the other "available" packages by default.
599 ** If your Emacs was built from a bzr checkout, the new variable
600 `emacs-bzr-version' contains information about the bzr revision used.
602 ** New option `create-lockfiles' specifies usage of lockfiles.
603 It defaults to t. Changing it to nil inhibits the creation of lock
604 files (use this with caution).
606 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
607 variables on remote hosts.
609 ** The entry for PCL-CVS has been removed from the Tools menu.
610 The PCL-CVS commands are still available via the keyboard.
612 ** Using "unibyte: t" in Lisp source files is obsolete.
613 Use "coding: raw-text" instead.
615 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
616 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
617 The previous binding, introduced in Emacs 24.1, was a mistake, because
618 `C-c LETTER' bindings are reserved for user customizations.
620 ** Internationalization
622 *** New language environment: Persian.
624 *** New input method `vietnamese-vni'.
626 ** Nextstep (GNUstep / Mac OS X) port
628 *** Support for fullscreen and the frame parameter fullscreen.
630 *** A file dialog is used for open/save operations initiated from the
634 * Editing Changes in Emacs 24.3
636 ** Search and Replace
638 *** Non-regexp Isearch now performs "lax" space matching.
639 Each sequence of spaces in the supplied search string may match any
640 sequence of one or more whitespace characters, as specified by the
641 variable `search-whitespace-regexp'. (This variable is also used by a
642 similar existing feature for regexp Isearch.)
644 *** New Isearch command `M-s SPC' toggles lax space matching.
645 This applies to both ordinary and regexp Isearch.
647 *** New option `replace-lax-whitespace'.
648 If non-nil, `query-replace' uses flexible whitespace matching too.
651 *** Global `M-s _' starts a symbol (identifier) incremental search,
652 and `M-s _' in Isearch toggles symbol search mode.
653 `M-s c' in Isearch toggles search case-sensitivity.
655 ** Navigation commands
657 *** New binding `M-g c' for `goto-char'.
659 *** New binding `M-g TAB' for `move-to-column'.
661 *** `M-g TAB' (`move-to-column') prompts for a column number if called
662 interactively with no prefix arg. Previously, it moved to column 1.
664 ** New option `yank-handled-properties' allows processing of text
665 properties on yanked text, in ways that are more general than just
666 removing them (as is done by `yank-excluded-properties').
668 ** New option `delete-trailing-lines' specifies whether
669 M-x delete-trailing-whitespace should delete trailing lines at the end
670 of the buffer. It defaults to t.
672 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
674 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
675 `ucs-insert' is now an obsolete alias for `insert-char'.
677 ** The `z' key no longer has a binding in most special modes.
678 It used to be bound to `kill-this-buffer', but `z' is too easy to
681 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
682 It copies the region-rectangle as the last rectangle kill.
686 *** `C-x r +' is now overloaded to invoke `append-to-register'.
688 *** New option `register-separator' specifies the register containing
689 the text to put between collected texts for use with
690 M-x append-to-register and M-x prepend-to-register.
693 * Changes in Specialized Modes and Packages in Emacs 24.3
695 ** Common Lisp emulation (CL)
697 *** CL's main entry is now (require 'cl-lib).
698 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
699 i.e., all its definitions have the "cl-" prefix (and internal definitions
700 use the "cl--" prefix).
702 If `cl' provided a feature under the name `foo', then `cl-lib'
703 provides it under the name `cl-foo' instead; with the exceptions of the
704 few `cl' definitions that had to use `foo*' to avoid conflicts with
705 pre-existing Elisp entities. These have been renamed to `cl-foo'
706 rather than `cl-foo*'.
708 The old `cl' is now deprecated and is mainly just a bunch of aliases that
709 provide the old, non-prefixed names. Some exceptions are listed below:
711 *** `cl-flet' is not like `flet' (which is deprecated).
712 Instead it obeys the behavior of Common-Lisp's `flet'.
713 In particular, in cl-flet function definitions are lexically scoped,
714 whereas in flet the scoping is dynamic.
716 *** `cl-labels' is slightly different from `labels'.
717 The difference is that it relies on the `lexical-binding' machinery
718 (as opposed to the `lexical-let' machinery used previously) to capture
719 definitions in closures, so such closures will only work if `lexical-binding'
722 *** `cl-letf' is not exactly like `letf'.
723 The only difference is in details that relate to some deprecated usage
724 of `symbol-function' in place forms.
726 *** `progv' was rewritten to use the `let' machinery.
727 A side effect is that variables without corresponding values are bound
728 to nil rather than being made unbound.
730 *** The following methods of extending `setf' are obsolete
731 (use features from gv.el instead):
732 `define-modify-macro' (use `gv-letplace')
733 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
734 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
735 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
739 *** Changes are now highlighted using the same color scheme as in
740 modern VCSes. Deletions are displayed in red (new faces
741 `diff-refine-removed' and `smerge-refined-removed', and new definition
742 of `diff-removed'), insertions in green (new faces `diff-refine-added'
743 and `smerge-refined-added', and new definition of `diff-added').
745 *** The variable `diff-use-changed-face' defines whether to use the
746 face `diff-changed', or `diff-removed' and `diff-added' to highlight
747 changes in context diffs.
749 *** The new command `diff-delete-trailing-whitespace' removes trailing
750 whitespace introduced by a diff.
752 ** Ediff now uses the same color scheme as Diff mode.
756 A new version of python.el, which provides several new features, including:
757 per-buffer shells, better indentation, Python 3 support, and improved
758 shell-interaction compatible with iPython (and virtually any other
761 *** Some user options have been replaced/renamed, including (old -> new):
762 **** python-indent -> python-indent-offset
763 **** python-guess-indent -> python-indent-guess-indent-offset
764 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
765 **** python-use-skeletons -> python-skeleton-autoinsert
767 *** Some user options have been removed, including:
769 **** `python-indent-string-contents': Strings are never indented.
771 **** `python-honour-comment-indentation':
772 Comments are always considered as indentation markers.
774 **** `python-continuation-offset': Indentation is automatically
775 calculated in a pep8 compliant way depending on the context.
777 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
778 Have no direct mapping as the shell interaction is completely different.
780 **** `python-python-command', `python-jython-command':
781 Replaced by `python-shell-interpreter'.
783 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
784 `python-pdbtrack-minor-mode-string', `python-source-modes':
787 *** Some commands have been replaced (old -> new):
788 **** python-insert-class -> python-skeleton-class
789 **** python-insert-def -> python-skeleton-def
790 **** python-insert-for -> python-skeleton-for
791 **** python-insert-if -> python-skeleton-if
792 **** python-insert-try/except -> python-skeleton-try
793 **** python-insert-try/finally -> python-skeleton-try
794 **** python-insert-while -> python-skeleton-while
795 **** python-find-function -> python-nav-jump-to-defun
796 **** python-next-statement -> python-nav-forward-sentence
797 **** python-previous-statement -> python-nav-backward-sentence
798 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
799 **** python-end-of-defun-function -> python-nav-end-of-defun
800 **** python-send-buffer -> python-shell-send-buffer
801 **** python-send-defun -> python-shell-send-defun
802 **** python-send-region -> python-shell-send-region
803 **** python-send-region-and-go -> emulate with python-shell-send-region
804 and python-shell-switch-to-shell
805 **** python-send-string -> python-shell-send-string
806 **** python-switch-to-python -> python-shell-switch-to-shell
807 **** python-describe-symbol -> python-eldoc-at-point
811 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
813 *** The D-Bus object manager interface is implemented.
815 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
816 if their value does not fit into Emacs's integer range.
818 *** The function `dbus-call-method' is now non-blocking.
819 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
821 *** Signals can also be sent as unicast messages.
823 *** The argument list of `dbus-register-signal' has been extended,
824 according to the new match rule types of D-Bus.
826 *** `dbus-init-bus' supports private connections.
828 *** There is a new function `dbus-setenv'.
830 ** `desktop-path' no longer includes the "." directory.
831 Desktop files are now located in ~/.emacs.d by default.
835 *** `dired-do-async-shell-command' executes each file sequentially
836 if the command ends in `;' (when operating on multiple files).
837 Otherwise, it executes the command on each file in parallel.
839 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
840 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
843 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
844 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
845 mark/unmark/flag all files in the active region.
847 *** The minibuffer default for `=' (`dired-diff) has changed.
848 It is now the backup file for the file at point, if one exists.
849 In Transient Mark mode the default is the file at the active mark.
851 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
852 The global binding for `M-=', `count-words-region' is in effect.
856 *** New module "notifications", which can send a notification when you
857 receive a private message or your nickname is mentioned.
859 *** ERC will look up server/channel names via auth-source and use any
862 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
863 only applies to messages sent by lurkers.
865 ** reStructuredText mode
867 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
868 fontification, comment handling, and customization have all been revised
871 *** Support for `imenu' and `which-function-mode'.
873 *** The reStructuredText syntax is more closely covered.
874 Sphinx support has been improved.
876 *** `rst-insert-list' inserts new list or continues existing lists.
878 *** A negative prefix argument always works for `rst-adjust'.
880 *** The window configuration is reset after displaying a TOC.
882 *** The constant `rst-version' describes the rst.el package version.
886 *** Support for percent literals and recognition of regular expressions
887 in method calls without parentheses with more methods, including Cucumber
890 *** Improved syntax highlighting and indentation.
892 *** New command `ruby-toggle-block', bound to `C-c {'.
894 *** Some non-standard keybindings/commands have been removed:
896 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
898 **** `ruby-mark-defun'; use `mark-defun'.
900 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
901 appropriate settings for the variables `beginning-of-defun-function'
902 and `end-of-defun-function'.
904 **** Non-standard keybindings for `backward-kill-word', `comment-region',
905 `reindent-then-newline-and-indent' and `newline' have been removed.
909 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
911 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
913 *** `sh-use-smie' lets you choose a new indentation and navigation code.
917 *** The free software compiler GHDL is supported (and now the default).
919 *** Support for the VHDL-AMS packages has been added/updated.
921 *** Updated to the 2002 revision of the VHDL standard.
923 *** Accepts \r and \f as whitespace.
927 *** The faces used by Apropos are now directly customizable.
928 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
929 see the `apropos' Custom group for details.
931 *** The old options whose values specified faces to use have been removed
932 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
936 *** This package has been rewritten to use Tabulated List mode.
938 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
939 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
943 *** Algebraic simplification mode is now the default.
944 To restrict to the limited simplifications given by the former
945 default simplification mode, use `m I'.
949 *** You can customize the header text that appears above each calendar month.
950 See the variable `calendar-month-header'.
952 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
954 *** The calendars produced by cal-html include holidays.
955 Customize `cal-html-holidays' to change this.
959 *** The major modes from the parser generators "Bovine" and "Wisent"
960 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
961 are in `auto-mode-alist', and the corresponding manuals are included.
965 **** Menu support for the "Configuration" feature. This allows users to
966 choose the active configuration (such as debug or install) from the menu.
968 **** New command `ede-set' to interactively set project-local variables.
970 **** Support for compiling, debugging, and running in "generic" projects.
972 **** Autoconf editing support for M4 macros with complex arguments.
974 **** Compilation support for the "linux" project type.
976 **** "simple" projects have been removed; use "generic" projects instead.
980 **** Support for parsing #include statements inside a namespace in C/C++.
982 **** Improved support for 'extern "C"' declarations in C/C++.
984 **** The ability to ignore more common special C/C++ preprocessor symbols,
985 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
986 If available, include cdefs.h as an additional source of preprocessor symbols.
988 **** Improved C/C++ function pointer parsing.
990 **** In Python, support for converting imports to include file names.
992 **** Ability to dynamically determine the Python load path.
994 **** Support for the Python 'WITH' and 'AT' keywords.
996 **** Improved tooltip completion.
1000 **** The SRecode manual is now included.
1002 **** Tag generation supports constructor/destructor settings and system
1003 include differentiation.
1005 **** Addition of 'Framework' support: Frameworks are specified when a
1006 particular kind of library (such as Android) is needed in a common language
1009 **** Support for nested templates and let variables override based on priority.
1011 **** Support for merging tables from multiple related modes, such as
1012 default -> c++ -> arduino.
1014 ** Compile has a new option `compilation-always-kill'.
1018 *** `custom-reset-button-menu' now defaults to t.
1020 *** Non-option variables are never matched in `customize-apropos' and
1021 `customize-apropos-options' (i.e., the prefix argument does nothing for
1022 these commands now).
1026 *** The variables `term-default-fg-color' and `term-default-bg-color'
1027 are now deprecated in favor of the customizable face `term'.
1029 *** You can customize how to display ANSI terminal colors and styles
1030 by customizing the corresponding `term-color-<COLOR>',
1031 `term-color-underline' and `term-color-bold' faces.
1035 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1037 *** Remote processes are now also supported on remote MS-Windows hosts.
1041 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1042 Previously, this slot stored semicolon-separated attribute-value pairs
1043 appended to some imap URLs, but this is not compatible with RFC 3986.
1044 So now the `filename' slot stores the entire path and query components,
1045 and the `attributes' slot is always nil.
1047 *** New function `url-encode-url' for encoding a URI string.
1048 The `url-retrieve' function now uses this to encode its URL argument,
1049 in case that is not properly encoded.
1051 ** notifications.el supports now version 1.2 of the Notifications API.
1052 The function `notifications-get-capabilities' returns the supported
1055 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1056 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1057 `flymake-warning-bitmap'.
1059 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1060 specifying URL types that should be converted to remote file names at
1061 the FFAP prompt. The default is now '("ftp").
1063 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1064 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1066 ** New option `mouse-avoidance-banish-position' specifies where the
1067 `banish' mouse avoidance setting moves the mouse.
1069 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1070 closing brackets to be aligned with the line of the opening bracket.
1072 ** In Proced mode, new command `proced-renice' renices marked processes.
1074 ** New option `async-shell-command-buffer' specifies the buffer to use
1075 for a new asynchronous `shell-command' when the default output buffer
1076 `*Async Shell Command*' is already in use.
1078 ** SQL mode has a new option `sql-db2-escape-newlines'.
1079 If non-nil, newlines sent to the command interpreter will be escaped
1080 by a backslash. The default does not escape the newlines and assumes
1081 that the sql statement will be terminated by a semicolon.
1083 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1084 (and modes that derive from it), sorts the column at point, or the Nth
1085 column if a numeric prefix argument is given.
1087 ** `which-func-modes' now defaults to t, so Which Function mode, when
1088 enabled, applies to all applicable major modes.
1090 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1093 ** Follow mode no longer works by using advice.
1094 The option `follow-intercept-processes' has been removed.
1096 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1098 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1099 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1100 *** semantic-change-hooks -> semantic-change-functions
1101 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1102 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1103 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1104 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1105 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1106 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1107 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1108 *** rcirc-activity-hooks -> rcirc-activity-functions
1109 *** rcirc-print-hooks -> rcirc-print-functions
1110 *** dbus-event-error-hooks -> dbus-event-error-functions
1111 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1112 *** checkdoc-style-hooks -> checkdoc-style-functions
1113 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1114 *** archive-extract-hooks -> archive-extract-hook
1115 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1116 *** hfy-post-html-hooks -> hfy-post-html-hook
1117 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1118 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1119 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1120 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1122 ** Obsolete packages
1125 In most cases, assoc+member+push+delq work just as well.
1126 And in any case it's just a terrible package: ugly semantics, terrible
1127 inefficiency, and not namespace-clean.
1136 * Incompatible Lisp Changes in Emacs 24.3
1138 ** Docstrings starting with `*' no longer indicate user options.
1139 Only variables defined using `defcustom' are considered user options.
1140 The function `user-variable-p' is now an obsolete alias for
1141 `custom-variable-p'.
1143 ** The return values of `defalias', `defun' and `defmacro' have changed,
1144 and are now undefined. For backwards compatibility, `defun' and
1145 `defmacro' currently return the name of the newly defined
1146 function/macro, but this should not be relied upon.
1148 ** `random' by default now returns a different random sequence in
1149 every Emacs run. Use `(random S)', where S is a string, to set the
1150 random seed to a value based on S, in order to get a repeatable
1151 sequence in later calls.
1153 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1154 that substring is inserted literally even if the LITERAL arg is
1155 non-nil, instead of causing an error to be signaled.
1157 ** `select-window' now always makes the window's buffer current.
1158 It does so even if the window was selected before.
1160 ** The function `x-select-font' can return a font spec, instead of a
1161 font name as a string. Whether it returns a font spec or a font name
1162 depends on the graphical library.
1164 ** `face-spec-set' no longer sets frame-specific attributes when the
1165 third argument is a frame (that usage was obsolete since Emacs 22.2).
1167 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1169 ** The CL package's `get-setf-method' function no longer exists.
1170 Generalized variables are now part of core Emacs Lisp, and implemented
1171 differently to the way cl.el used to do it. It is not possible to
1172 define a compatible replacement for `get-setf-method'. See the file
1173 gv.el for internal details of the new implementation.
1175 ** The arguments of `dbus-register-signal' are no longer just strings,
1176 but keywords or keyword-string pairs. The old argument list will
1177 still be supported for Emacs 24.x.
1179 ** Miscellaneous name changes
1180 Some Lisp symbols have been renamed to correct their spelling,
1181 or to be more consistent with standard Emacs terminology.
1183 *** Renamed functions
1184 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1185 **** inactivate-input-method -> deactivate-input-method
1186 **** quail-inactivate -> quail-deactivate
1187 **** robin-inactivate -> robin-deactivate
1188 **** viper-inactivate-input-method -> viper-deactivate-input-method
1189 **** viper-inactivate-input-method-action ->
1190 viper-deactivate-input-method-action
1191 **** ucs-input-inactivate -> ucs-input-deactivate
1194 The old hooks are still supported for backward compatibility, but they
1195 are deprecated and will be removed eventually.
1196 **** input-method-inactivate-hook -> input-method-deactivate-hook
1197 **** robin-inactivate-hook -> robin-deactivate-hook
1198 **** quail-inactivate-hook -> quail-deactivate-hook
1200 *** Renamed variables
1201 **** follow-deactive-menu -> follow-inactive-menu
1202 **** inactivate-current-input-method-function ->
1203 deactivate-current-input-method-function
1205 ** Some obsolete functions, variables, and faces have been removed:
1206 *** `last-input-char', `last-command-char', `unread-command-char'
1207 *** `facemenu-unlisted-faces'
1208 *** `rmail-decode-mime-charset'
1209 *** `iswitchb-read-buffer'
1210 *** `sc-version', `sc-submit-bug-report'
1211 *** `set-char-table-default'
1212 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1213 *** `compile-internal'
1215 *** `mode-line-inverse-video'
1216 *** `follow-mode-off-hook'
1217 *** `cvs-commit-buffer-require-final-newline'
1218 (use `log-edit-require-final-newline' instead)
1219 *** `cvs-changelog-full-paragraphs'
1220 (use `log-edit-changelog-full-paragraphs' instead)
1221 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1222 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1223 *** `vc-master-templates' (use `vc-handled-backends' instead)
1224 *** `vc-checkout-carefully'
1227 * Lisp Changes in Emacs 24.3
1229 ** CL-style generalized variables are now in core Elisp.
1230 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1231 You can define your own generalized variables using `gv-define-simple-setter',
1232 `gv-define-setter', etc.
1234 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1235 This can significantly speed up execution of non-byte-compiled code,
1236 but can also bump into previously unnoticed cyclic dependencies.
1237 These are generally harmless: they will simply cause the macro calls
1238 to be left for later expansion (as before), but will result in a
1239 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1240 You may wish to restructure your code so this does not happen.
1242 ** New sampling-based Elisp profiler.
1243 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1244 When finished, use M-x profiler-stop. The sampling rate can be based on
1245 CPU time or memory allocations.
1247 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1248 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1250 ** New macros `setq-local' and `defvar-local'.
1252 ** Face underlining can now use a wave.
1254 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1255 of `read-regexp' accepts a string ending with a colon and space, and its
1256 second argument DEFAULTS can be a list of strings accessible via `M-n'
1257 in the minibuffer ahead of other hard-coded useful regexp-related values.
1258 More commands use `read-regexp' now to read their regexp arguments.
1262 *** New function `completion-table-with-quoting' to handle completion
1263 in the presence of quoting, such as file completion in shell buffers.
1265 *** New function `completion-table-subvert' to use an existing completion
1266 table, but with a different prefix.
1270 *** New error type and new function `user-error'.
1271 These do not trigger the debugger.
1273 *** New option `debugger-bury-or-kill', saying what to do with the
1274 debugger buffer when exiting debug.
1276 *** Set `debug-on-message' to enter the debugger when a certain
1277 message is displayed in the echo area. This can be useful when trying
1278 to work out which code is doing something.
1280 *** New var `inhibit-debugger', automatically set to prevent accidental
1281 recursive invocations.
1285 *** New command `fit-frame-to-buffer' adjusts the frame height to
1288 *** The command `fit-window-to-buffer' can adjust the frame height
1289 if the new option `fit-frame-to-buffer' is non-nil.
1291 *** New macro `with-temp-buffer-window', similar to
1292 `with-output-to-temp-buffer'.
1294 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1297 *** New option `switch-to-buffer-preserve-window-point' to restore a
1298 window's point when switching buffers.
1300 *** New display action alist entries `window-height' and `window-width'
1301 specify the size of new windows created by `display-buffer'.
1303 *** New display action alist entry `pop-up-frame-parameters', if
1304 non-nil, specifies frame parameters to give any newly-created frame.
1306 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1307 tells display action functions to avoid changing which frame is
1310 *** New display action alist entry `previous-window', if non-nil,
1311 specifies window to reuse in `display-buffer-in-previous-window'.
1313 *** New display action functions `display-buffer-below-selected',
1314 and `display-buffer-in-previous-window'.
1316 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1317 now accept a third argument to avoid choosing the selected window.
1319 *** Additional values recognized for option `window-combination-limit'.
1321 *** The following variables are obsolete, as they can be replaced by
1322 appropriate entries in the `display-buffer-alist' function introduced
1324 **** `dired-shrink-to-fit'
1325 **** `display-buffer-reuse-frames'
1326 **** `display-buffer-function'
1327 **** `special-display-buffer-names'
1328 **** `special-display-frame-alist'
1329 **** `special-display-function'
1330 **** `special-display-regexps'
1334 *** `current-time-string' no longer requires that its argument's year
1335 must be in the range 1000..9999. It now works with any year supported
1336 by the underlying C implementation.
1338 *** `current-time' now returns extended-format time stamps
1339 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1340 PSEC is typically a multiple of 1000 on current machines. Other
1341 functions that use this format, such as `file-attributes' and
1342 `format-time-string', have been changed accordingly. Old-format time
1343 stamps are still accepted.
1345 *** The format of timers in `timer-list' and `timer-idle-list' is now
1346 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1347 The PSECS slot is new, and uses picosecond resolution. It can be
1348 accessed via the new `timer--psecs' accessor.
1350 *** Last-modified time stamps in undo lists now are of the form
1351 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1355 *** Improved security when handling persistent objects:
1357 **** `eieio-persistent-read' now features optional arguments for specifying
1358 the class to load, as well as a flag stating whether subclasses are allowed;
1359 if provided, other classes will be rejected by the reader. For
1360 compatibility with existing code, if the class is omitted only a
1363 **** New specialized reader for pulling in classes and signaling errors
1364 without evaluation of suspicious code.
1366 **** All slots that contain objects must have a :type. Slots with lists
1367 of objects must use a new type predicate for a list of an object type.
1369 *** Support for `find-function' and similar utilities, through the addition
1370 of filename support to generated symbols.
1372 ** Floating point functions now always return special values like NaN,
1373 instead of signaling errors, if given invalid args; e.g., (log -1.0).
1374 Previously, they returned NaNs on some platforms but signaled errors
1375 on others. The affected functions are acos, asin, tan, exp, expt,
1376 log, log10, sqrt, and mod.
1378 ** New fringe bitmap `exclamation-mark'.
1380 ** Miscellaneous changes to special forms and macros
1382 *** `defun' and `defmacro' are now macros rather than special forms.
1384 *** `kbd' is now a function rather than a macro.
1386 ** Miscellaneous new functions
1388 *** `set-temporary-overlay-map' sets up a temporary keymap that
1389 takes precedence over most other maps for a short while (normally one key).
1391 *** `autoloadp' tests if its argument is an autoloaded object.
1393 *** `autoload-do-load' performs the autoloading operation.
1395 *** `buffer-narrowed-p' tests if the buffer is narrowed.
1397 *** `file-name-base' returns a file name sans directory and extension.
1399 *** `function-get' fetches a function property, following aliases.
1401 *** `posnp' tests if an object is a `posn'.
1403 *** `system-users' returns the user names on the system.
1405 *** `system-groups' returns the group names on the system.
1407 *** `tty-top-frame' returns the topmost frame of a text terminal.
1409 ** The following functions and variables are obsolete:
1410 *** `automount-dir-prefix' (use `directory-abbrev-alist')
1411 *** `buffer-has-markers-at'
1412 *** `macro-declaration-function' (use `macro-declarations-alist')
1413 *** `window-system-version' (provides no useful information)
1414 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
1415 *** `query-replace-interactive'
1416 *** `font-list-limit' (has had no effect since Emacs < 23)
1419 * Changes in Emacs 24.3 on Non-Free Operating Systems
1421 ** Cygwin builds can use the native MS Windows user interface.
1422 Pass `--with-w32' to configure. The default remains the X11 interface.
1424 ** Two new functions are available in Cygwin builds:
1425 `cygwin-convert-file-name-from-windows' and
1426 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
1427 code to access the Cygwin file-name mapping machinery to convert
1428 between Cygwin and Windows-native file and directory names.
1430 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
1431 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
1432 `mouse-autoselect-window'.
1434 ** On MS Windows Vista and later Emacs now supports symbolic links.
1436 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
1437 support for libxml2, even if its presence is detected.
1439 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1441 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
1442 directories to the search path. You must add them yourself if you want them.
1445 * Changes in Emacs 24.2
1447 ** This is mainly a bug-fix release.
1450 * Installation Changes in Emacs 24.1
1452 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1453 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1454 also depend on Gtk+. You can disable them with --without-rsvg and
1457 ** Emacs can be compiled with GnuTLS support.
1458 This happens by default if a suitably recent version of the library is
1459 found at build time. To prevent this, use the configure option
1460 `--without-gnutls'. See below for GnuTLS features.
1462 ** Emacs can be compiled with SELinux support.
1463 This happens by default if a suitably recent version of the library is
1464 found at build time. To prevent this, use the configure option
1465 `--without-selinux'. See below for SELinux features.
1467 ** Emacs can be compiled with ImageMagick support.
1468 This happens by default if a suitably recent version of the library is
1469 found at build time. To prevent this, use the configure option
1470 `--without-imagemagick'. See below for ImageMagick features.
1471 This feature is not available for the Nextstep or MS ports.
1473 ** Emacs can be compiled with libxml2 support.
1474 This happens by default if a suitably recent version of the library is
1475 found at build time. To prevent this, use the configure option
1476 `--without-xml2'. See below for libxml2 features.
1478 ** By default, the installed Info and man pages are compressed.
1479 You can disable this by configuring --without-compress-info.
1481 ** New configure option --with-wide-int.
1482 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
1483 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1486 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
1487 These provide no new functionality, they just remove the need to edit
1488 lib-src/Makefile by hand in order to use the associated features.
1490 ** New configure option --enable-use-lisp-union-type.
1491 This is only useful for Emacs developers to debug certain types of bugs.
1492 This is not a new feature; only the configure flag is new.
1494 ** The standalone programs digest-doc and sorted-doc are removed.
1495 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1497 ** The standalone program `fakemail' is removed.
1498 If you need it, feedmail.el provides a superset of the functionality.
1501 * Startup Changes in Emacs 24.1
1503 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1504 command line arguments, and the EMACS_UNIBYTE environment variable, no
1505 longer have any effect. (They were declared obsolete in Emacs 23.)
1507 ** New command line option `--no-site-lisp' removes site-lisp directories
1508 from load-path. -Q now implies this. This option does not affect the
1509 EMACSLOADPATH environment variable (and hence has no effect for
1513 * Changes in Emacs 24.1
1517 *** Many packages now use the `completion-at-point' command,
1518 rather than implementing separate completion commands.
1520 *** `completion-at-point' now handles tags and semantic completion.
1522 *** Completion in a non-minibuffer now tries to detect the end of completion
1523 and pops down the *Completions* buffer accordingly.
1525 *** New option `completion-cycle-threshold' allows completion cycling.
1527 *** New option `completion-category-overrides' for overriding the
1528 default completion style in certain circumstances.
1530 *** New completion style `substring'.
1532 *** Completion of buffer names uses `substring' completion by default.
1534 *** The option `widget-complete-field' has been removed.
1538 *** The first time you try sending mail, Emacs asks for a mail method.
1539 This is implemented by a new default for `send-mail-function', which
1540 is `sendmail-query-once'. This offers to use the smtpmail package, or
1541 to use the old defaults relying on external mail facilities
1542 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
1543 `mailclient-send-it' on Windows).
1545 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
1546 transfers the report to your desktop's preferred mail client, if there
1547 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
1550 *** See Changes in Specialized Modes and Packages for SMTPmail changes
1551 and Mail mode changes
1553 ** Emacs server and client changes
1555 *** New option `server-port' specifies the port for TCP Emacs servers.
1557 *** New emacsclient argument -q/--quiet suppresses some status messages.
1559 *** New emacsclient argument --frame-parameters specifies the frame
1560 parameters of any newly-created graphical frame.
1562 *** If emacsclient shuts down due to Emacs signaling an error,
1563 its exit status is 1.
1565 *** New emacsclient argument --parent-id ID.
1566 This opens a client frame in parent X window ID, via XEmbed, similar
1567 to the --parent-id argument to Emacs.
1569 ** Internationalization changes
1571 *** Emacs now supports display and editing of bidirectional text.
1572 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1573 displayed in the correct visual order as expected by users of those
1574 scripts. The display reordering is a "full bidirectionality" class
1575 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1576 with no RTL text should look exactly the same as before.
1578 **** New buffer-local variable `bidi-display-reordering'.
1579 To disable display reordering in a buffer, change this to nil.
1581 **** New buffer-local variable `bidi-paragraph-direction'.
1582 If nil (the default), Emacs determines the base direction of each
1583 paragraph from its text, as specified by the UBA. Setting the value
1584 to `right-to-left' or `left-to-right' forces a base direction on each
1587 Paragraphs with right-to-left base direction are displayed starting at
1588 the right window edge.
1590 *** Enhanced support for characters with no glyphs in available fonts,
1591 or, on text terminals, characters that cannot be encoded by the
1592 terminal coding system. The new option `glyphless-char-display-control'
1593 specifies how to display them: as a hexadecimal code in a box, a thin
1594 1-pixel space, an empty box, etc.
1596 *** New input methods for Farsi and Bulgarian
1597 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
1599 *** `nobreak-char-display' now also highlights Unicode hyphen chars
1600 (U+2010 and U+2011).
1602 *** New Hebrew translation of the Emacs Tutorial.
1603 Type `C-u C-h t' to choose it in case your language setup doesn't
1604 automatically select it.
1606 ** An Emacs Lisp package manager is now included.
1607 This is a convenient way to download and install additional packages,
1608 from a package repository at http://elpa.gnu.org.
1610 *** M-x list-packages shows a list of packages, which can be
1611 selected for installation.
1613 *** New command `describe-package', bound to `C-h P'.
1615 *** By default, all installed packages are loaded automatically when
1616 Emacs starts up. To disable this, set `package-enable-at-startup' to
1617 nil. To specify the packages to load, customize `package-load-list'.
1619 ** Custom theme changes
1621 *** New command `M-x customize-themes', which provides a convenient
1622 interface for enabling and disabling Custom themes.
1624 *** New option `custom-theme-load-path' is the load path for themes.
1625 Emacs no longer looks for Custom themes in `load-path'. The default
1626 value of `custom-theme-load-path' says to look for themes in
1627 `custom-theme-directory', followed by a subdirectory of
1628 `data-directory' named "themes/", which contains a small selection of
1629 built-in Custom themes.
1631 *** New option `custom-safe-themes' records known-safe theme files.
1632 If a theme is not in this list, Emacs queries before loading it, and
1633 offers to save the theme to `custom-safe-themes' automatically. By
1634 default, all themes included in Emacs are treated as safe.
1636 ** Improved GTK integration
1638 *** GTK scroll-bars are now placed on the right by default.
1639 The function `set-scroll-bar-mode' can change this.
1641 *** GTK tool bars can have just text, just images or images and text.
1642 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
1643 the default is taken from desktop settings.
1645 *** GTK tool bars can be placed on any edge of the frame.
1646 The frame-parameter tool-bar-position controls this. It takes the
1647 values top, left, right or bottom. The Options => Show/Hide menu has
1650 *** The default colors for selected text (the `region' face) are taken
1651 from the GTK theme when Emacs is built with GTK.
1653 *** Emacs uses GTK tooltips by default if built with GTK.
1654 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
1656 ** Graphical interface changes
1658 *** On graphical displays, the mode-line no longer ends in dashes.
1659 Also, the first dash (which does not indicate anything) is just
1660 displayed as a space.
1662 *** `menu-bar-select-buffer-function' lets you choose another operation
1663 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
1665 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
1666 built with Xft. These fonts can be set via X resources, for example:
1667 Emacs.pane.menubar.font: Courier-12
1671 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
1672 or if it receives a SIGINT signal in batch mode.
1674 *** `kill-emacs-hook' is now also run in batch mode.
1675 Third-party code which adds to `kill-emacs-hook' should check if they
1676 do the right thing in batch mode.
1678 ** Scrolling changes
1680 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
1681 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
1682 of buffer at first key-press (instead they move to top/bottom of buffer)
1683 when `scroll-error-top-bottom' is non-nil.
1685 *** New option `scroll-error-top-bottom' (see above).
1687 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
1688 scroll a line instead of full screen.
1690 *** New property `scroll-command' should be set on a command's symbol to
1691 define it as a scroll command affected by `scroll-preserve-screen-position'.
1693 *** If you customize `scroll-conservatively' to a value greater than 100,
1694 Emacs will never recenter point in the window when it scrolls due to
1695 cursor motion commands or commands that move point (e.f., `M-g M-g').
1696 Previously, you needed to use `most-positive-fixnum' as the value of
1697 `scroll-conservatively' to achieve the same effect.
1699 *** "Aggressive" scrolling now honors the scroll margins.
1700 If you customize `scroll-up-aggressively' or
1701 `scroll-down-aggressively' and move point off the window, Emacs now
1702 scrolls the window so as to avoid positioning point inside the scroll
1705 ** Basic SELinux support has been added.
1706 This requires Emacs to be linked with libselinux at build time.
1708 *** Emacs preserves the SELinux file context when backing up.
1709 Also, the function `copy-file' has an extra optional argument for
1710 preserving SELinux context, and the return value of `backup-buffer'
1711 now includes the SELinux context.
1713 *** New functions `file-selinux-context' and `set-file-selinux-context'
1714 get and set the SELinux context of a file.
1718 *** `delete-by-moving-to-trash' now only affects commands that specify
1719 trashing. This avoids inadvertently trashing temporary files.
1721 *** Calling `delete-file' or `delete-directory' with a prefix argument
1722 now forces true deletion, regardless of `delete-by-moving-to-trash'.
1724 ** File- and directory-local variable changes
1726 *** You can stop directory local vars from applying to subdirectories.
1727 Add an element (subdirs . nil) to the alist portion of any variables
1728 settings to indicate that the section should not apply to
1731 *** Directory local variables can apply to some file-less buffers.
1732 Affected modes include dired, vc-dir, and log-edit. For example,
1733 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
1734 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
1735 `hack-dir-local-variables-non-file-buffer' to support this.
1737 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
1738 Instead, use "eval: (minor-mode 1)".
1740 *** The variable `inhibit-first-line-modes-regexps' has been renamed
1741 to `inhibit-local-variables-regexps'. As the name suggests, it now
1742 applies to ALL file local variables, not just -*- lines. The
1743 associated `inhibit-first-line-modes-suffixes' has been renamed in the
1748 *** The `quit-window' command now restores the last buffer displayed
1749 in the quitted window.
1751 *** Resizing an Emacs frame now preserves proportional window sizes,
1752 modulo restrictions like window minimum sizes and fixed-size windows.
1754 *** The behavior of `display-buffer' is now customizable in detail.
1756 **** New option `display-buffer-base-action' specifies a list of
1757 user-determined display "actions" (functions and optional arguments
1758 for choosing the displaying window).
1760 This takes precedence over the default display action, which is
1761 specified by `display-buffer-fallback-action'.
1763 **** New option `display-buffer-alist' maps buffer name regexps to
1764 display actions, taking precedence over `display-buffer-base-action'.
1766 *** New option `window-combination-limit'.
1767 The new option `window-combination-limit' allows to return the space
1768 obtained for resizing or creating a window more reliably to the window
1769 from which such space was obtained.
1771 *** New option `window-combination-resize'.
1772 The new option `window-combination-resize' allows to split a window that
1773 otherwise cannot be split because it's too small by stealing space from
1774 other windows in the same combination. Subsequent resizing or deletion
1775 of the window will resize all windows in the same combination as well.
1777 *** New option `frame-auto-hide-function' lets you choose between
1778 iconifying or deleting a frame when burying a buffer in a dedicated
1779 frame, or quitting a window showing a buffer in a frame of its own.
1781 *** New commands `maximize-window' and `minimize-window'.
1782 These maximize and minimize the size of a window within its frame.
1784 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
1785 These functions allow to navigate through the live buffers that have
1786 been shown in a specific window.
1788 ** Minibuffer changes
1790 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
1791 This is handy for minibuffer-only frames, and is also used for the feature
1792 where mouse-1 pops up *Messages*"', which can now easily be changed.
1794 *** Minibuffers set `truncate-lines' to nil.
1795 If you want to change the value to something else, you could use
1796 for example `minibuffer-setup-hook'.
1798 ** `auto-mode-case-fold' is now enabled by default.
1800 ** `backup-by-copying-when-mismatch' now defaults to t.
1802 ** New basic faces `error', `warning', `success'.
1803 These are used to highlight text indicating failure, caution or
1804 successful operation.
1806 ** New option `list-colors-sort' defines the color sort order
1807 for `list-colors-display'.
1809 ** The variable `focus-follows-mouse' now always defaults to nil.
1812 * Editing Changes in Emacs 24.1
1816 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
1817 `isearch-yank-line'.
1819 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
1820 `isearch-yank-kill'.
1822 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
1824 ** New commands `count-words-region' and `count-words'.
1826 *** M-= is bound to `count-words-region', not `count-lines-region'.
1827 The `count-words-region' command, when called interactively, reports
1828 the number of lines, words, and characters in the region. It is a
1829 superset of the old `count-lines-region', which is now an obsolete
1832 ** The command `just-one-space' (M-SPC), if given a negative argument,
1833 also deletes newlines around point.
1837 *** New option `delete-active-region'.
1838 If non-nil, [delete] and DEL delete the region if it is active and no
1839 prefix argument is given. If set to `kill', those commands kill
1842 *** New command `delete-forward-char', bound to [delete].
1843 This is meant for interactive use, and obeys `delete-active-region'.
1844 The command `delete-char' does not obey `delete-active-region'.
1846 *** `delete-backward-char' is now a Lisp function.
1847 Apart from obeying `delete-active-region', its behavior is unchanged.
1848 However, the byte compiler now warns if it is called from Lisp; Lisp
1849 callers should use delete-char with a negative argument instead.
1851 *** The option `mouse-region-delete-keys' has been deleted.
1853 ** Selection changes.
1855 The default handling of clipboard and primary selections has been
1856 changed to conform with modern X applications. In short, most
1857 commands for killing and yanking text now use the clipboard, while
1858 mouse commands use the primary selection.
1860 In the following, we provide a list of these changes, followed by a
1861 list of steps to get the old behavior back if you prefer that.
1863 *** `select-active-regions' now defaults to t.
1864 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
1865 the kill ring. The selected text is put in the primary selection, if
1866 the system possesses a separate primary selection facility (e.g. X).
1868 **** `select-active-regions' also accepts a new value, `only'.
1869 This means to only set the primary selection for temporarily active
1870 regions (usually made by mouse-dragging or shift-selection);
1871 "ordinary" active regions, such as those made with C-SPC followed by
1872 point motion, do not alter the primary selection.
1874 **** `mouse-drag-copy-region' now defaults to nil.
1876 *** mouse-2 is now bound to `mouse-yank-primary'.
1877 This pastes from the primary selection, ignoring the kill-ring.
1878 Previously, mouse-2 was bound to `mouse-yank-at-click'.
1880 *** `x-select-enable-clipboard' now defaults to t on all platforms.
1882 *** `x-select-enable-primary' now defaults to nil.
1883 Thus, commands that kill text or copy it to the kill-ring (such as
1884 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
1886 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
1887 exactly equivalent to M-w, C-w, and C-y respectively.
1889 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
1890 non-nil by default, as Windows does not support the primary selection
1891 between applications.
1893 *** To return to the previous behavior, do the following:
1895 **** Change `select-active-regions' to nil.
1896 **** Change `mouse-drag-copy-region' to t.
1897 **** Change `x-select-enable-primary' to t (on X only).
1898 **** Change `x-select-enable-clipboard' to nil.
1899 **** Bind `mouse-yank-at-click' to mouse-2.
1901 *** Support for X cut buffers has been removed.
1903 *** X clipboard managers are now supported.
1904 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
1906 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
1907 in the current rectangle. With a prefix argument, this prompts for a
1908 number to count from and for a format string.
1910 ** `redisplay-dont-pause' now defaults to t.
1911 This makes Emacs feel more responsive to editing commands that arrive
1912 at high rate, e.g. if you lean on some key, because stopping redisplay
1913 in the middle (when this variable is nil) forces more expensive
1914 updates later on, and Emacs appears to be unable to keep up.
1916 ** The behavior of <TAB> for active regions in Text mode has changed.
1917 In Text and related modes, typing <TAB> (`indent-for-tab-command')
1918 when the region is active causes Emacs to indent all the lines in the
1919 region, aligning them with the line previous to the first line in the
1920 region (or with the left margin if there is no previous line).
1922 ** When `occur' is called with a prefix argument, matching strings are
1923 collected into the `*Occur*' buffer without line numbers. If there
1924 are parenthesized subexpressions in the specified regexp, `occur'
1925 reads replacement text that may contain \\& and \\N whose convention
1926 follows `replace-match'.
1929 * Changes in Specialized Modes and Packages in Emacs 24.1
1931 ** Archive Mode has basic support for browsing and updating 7z archives.
1935 *** BibTeX mode now supports biblatex.
1936 Use the variable `bibtex-dialect' to select different BibTeX dialects.
1937 `bibtex-entry-field-alist' is now an obsolete alias for
1938 `bibtex-BibTeX-entry-alist'.
1940 *** New command `bibtex-search-entries', bound to C-c C-a.
1942 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
1944 *** New variable `bibtex-search-entry-globally'.
1948 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
1950 *** The default browser used by the package is now the "xdg-open" program,
1951 on platforms that support it. This calls your desktop's preferred browser.
1955 *** Support for musical notes.
1957 *** Support for logarithmic units.
1959 *** No longer uses the tex prefix for TeX specific unit names when
1960 using TeX or LaTeX mode.
1962 *** New option to highlight selections using faces.
1964 *** `calc-histogram' has the option of using a vector to determine the bins.
1966 *** New "O" option prefix.
1968 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
1970 ** Calendar, Diary, and Appt
1972 *** Diary entries can contain non-printing "comments".
1973 See the variable `diary-comment-start'.
1975 *** Appointments can specify their individual warning times.
1976 See the variable `appt-warning-time-regexp'.
1978 *** The function specified by `appt-disp-window-function' may be passed
1979 lists of arguments if multiple appointments are due at similar times.
1980 If you are using a custom function for this, you should update it.
1982 *** New function `diary-hebrew-birthday'.
1984 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
1985 may no longer be nil, but must all be strings.
1987 *** The obsolete (since Emacs 22.1) method of enabling the appt
1988 package by adding `appt-make-list' to `diary-hook' has been removed.
1989 Use `appt-activate' instead.
1991 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
1992 appt-issue-message (use the function appt-activate)
1993 appt-visible/appt-msg-window (use the variable appt-display-format)
1995 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
1996 view-diary-entries, list-diary-entries, show-all-diary-entries
2000 *** New feature to "guess" the style in an existing buffer.
2001 The main entry point is M-x c-guess.
2003 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2005 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2006 Thus C-M-a will, by default, go to the beginning of the immediate function,
2009 *** "Macros with semicolons" can be registered for correct indentation.
2010 Where such a macro ends a line (no semicolon) the next statement is no longer
2011 parsed as a statement continuation.
2013 ** Comint and modes derived from it use the standard completion code.
2017 *** Compilation mode can be used without Font Lock mode.
2018 `compilation-parse-errors-function' is now obsolete.
2020 *** New variable `compilation-filter-start', which is bound while
2021 `compilation-filter-hook' runs. It records the start position of the
2022 text inserted by `compilation-filter'.
2024 *** `compilation-error-screen-columns' and `compilation-first-column'
2025 are obeyed in the editing buffer. So programming language modes can
2026 set them, whereas previously only the value in the *Compilation*
2031 *** Customize buffers now contain a search field.
2032 The search is performed using `customize-apropos'.
2033 To turn off the search field, set `custom-search-field' to nil.
2035 *** Options in customize group buffers start out hidden if not customized.
2036 Use the arrow to the left of the option name to toggle visibility.
2038 *** custom-buffer-sort-alphabetically now defaults to t.
2040 *** The color widget now has a "Choose" button, which allows you to
2041 choose a color via `list-colors-display'.
2045 *** It is now possible to access buses other than the default system
2048 *** The `dbus-register-method' and `dbus-register-property' functions
2049 optionally do not register names.
2051 *** The new function `dbus-register-service' registers a known service
2052 name on a D-Bus without also registering a property or a method.
2056 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2057 if called with a prefix argument, read a file name from the minibuffer
2058 instead of using the current buffer.
2060 *** The "dired local variables" feature of Dired-x is obsolete.
2061 The standard directory local variables feature replaces it.
2065 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2066 controlling attempts to autojoin a channel.
2068 *** New variable `erc-coding-system-precedence': If we use `undecided'
2069 as the server coding system, this variable will then be consulted.
2070 The default is to decode strings that can be decoded as utf-8 as
2071 utf-8, and do the normal `undecided' decoding for the rest.
2075 *** The default value of `eshell-directory-name' has changed
2076 to be an "eshell" directory in `user-emacs-directory'.
2077 The old "~/.eshell/" directory is still used if it exists, though.
2081 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2082 It now supports multithread non-stop debugging and simultaneous
2083 debugging of several threads.
2087 *** RET (`image-toggle-animation') toggles animation, if applicable.
2088 Animation plays once, unless the option `image-animate-loop' is non-nil.
2092 *** New command M-x info-display-manual displays a named Info manual.
2093 If that manual is already visited in some Info buffer, it displays
2094 that buffer. (This is handy if you have many manuals in many *info*
2095 buffers, and don't remember the name of the buffer visiting the manual
2096 you want to consult.) Otherwise, it loads and displays the manual.
2098 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2099 This is for compatibility with the stand-alone Info reader program,
2100 and also because `Info-edit' is a rarely used command that is disabled
2103 ** Mail mode changes (not Message mode)
2105 *** New command M-x mail-add-attachment for adding MIME attachments
2107 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2108 (Its name is misleading, since it has nothing to do with MIME
2109 attachments.) The old name is now an obsolete alias to the new name.
2111 ** MH-E has been updated to MH-E version 8.3.1.
2112 See MH-E-NEWS for details.
2114 ** Modula-2 mode provides auto-indentation.
2116 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2118 ** nXML mode no longer binds C-RET to `nxml-complete'.
2119 Completion is now performed via `completion-at-point', bound to C-M-i
2120 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2121 default), this performs tag completion.
2123 ** Org mode has been updated to version 7.8.09.
2124 See ORG-NEWS for details.
2126 ** Prolog mode has been completely revamped, with lots of additional
2127 functionality such as more intelligent indentation, electricity,
2128 support for more variants, including Mercury, and a lot more.
2132 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2133 in the Rmail incoming message.
2135 *** The variable `rmail-message-filter' no longer has any effect.
2136 This change was made in Emacs 23.1 but was not advertised at the time.
2137 Try using `rmail-show-message-hook' instead.
2141 *** M-x shell prompts for the shell path name if the default directory
2142 is a remote file name and neither the environment variable $ESHELL nor
2143 the variable `explicit-shell-file-name' is set.
2145 *** TAB is now bound to the standard `completion-at-point' command,
2146 which now implements the pcomplete rules for shell command completion.
2150 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2151 if the mail server supports them. This uses either built-in GnuTLS
2152 support, or the starttls.el library. Customize `smtpmail-stream-type'
2155 *** The variable `smtpmail-auth-credentials' has been removed.
2156 By default, the information is now stored in the file ~/.authinfo.
2157 This was the default value of smtpmail-auth-credentials. If you had
2158 customized smtpmail-auth-credentials to a list of user names and
2159 passwords, those settings are not used. During your first connection
2160 to the smtp server, Emacs will prompt for the user name and password,
2161 and offer to save them to ~/.authinfo. Or you can manually copy the
2162 credentials to ~/.authinfo. For example, if you had
2164 (setq smtpmail-auth-credentials
2165 '(("mail.example.org" 25 "jim" "s!cret")))
2167 then the equivalent line in ~/.authinfo would be
2169 machine mail.example.org port 25 login jim password s!cret
2171 See the auth-source manual for more information, e.g. on encrypting
2172 the credentials file.
2174 *** The variable `smtpmail-starttls-credentials' has been removed.
2175 If you had that set, you need to put
2177 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2179 in your ~/.authinfo file instead.
2181 *** SMTPmail defaults to using the address in the From: header as the
2182 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2183 to the address you wish to use instead.
2187 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2188 and `sql-oracle-scan-on'.
2190 *** New options controlling prompting for login parameters.
2191 Each supported product has a custom variable `sql-*-login-params',
2192 which is a list of the parameters to be prompted for before a
2193 connection is established.
2195 *** The command `sql-product-interactive' now takes a prefix argument,
2196 which causes it to prompt for an SQL product.
2198 *** Product-specific SQL interactive commands now take prefix arguments.
2199 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2200 given a prefix argument, prompt for a name for the SQL interactive
2201 buffer. This reduces the need for calling `sql-rename-buffer'.
2203 *** SQL interactive modes suppress command continuation prompts, and
2204 replace tabs with spaces. The first change impacts multiple line SQL
2205 statements entered with C-j between each line, statements yanked into
2206 the buffer and statements sent with `sql-send-*' functions. The
2207 second prevents the MySQL and Postgres interpreters from listing
2208 object name completions when sent text via `sql-send-*' functions.
2210 *** New command `sql-connect' starts a predefined SQLi session,
2211 using the login parameters from `sql-connection-alist'.
2213 *** New "Save Connection" menu item in SQLi buffers.
2214 This gathers the login params specified for the SQLi session, if it
2215 was not started by a connection, and saves them as a new connection.
2217 *** New commands for listing database objects and details:
2218 sql-list-all and sql-list-table.
2220 *** An API for manipulating SQL product definitions has been added.
2224 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2228 *** New inline access method "ksu" (kerberized su).
2230 *** The following access methods are discontinued: "ssh1_old",
2231 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2233 *** The user option `remote-file-name-inhibit-cache' controls whether
2234 remote file attributes are cached for better performance.
2236 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2237 default value to "".
2239 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2240 for remote machines which support SELinux.
2242 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2243 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2244 the degree of parallelism.
2246 ** VC and related modes
2248 *** Support for pulling on distributed version control systems.
2249 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2250 supported (currently with Bzr, Git, and Mercurial), to update the
2251 current branch and working tree. A prefix argument means to prompt
2252 the user for specifics, e.g. a pull location.
2254 *** `vc-update' is now an alias for `vc-pull'.
2256 *** Support for merging on distributed version control systems.
2257 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2258 is supported (currently with Bzr, Git, and Mercurial), to merge
2259 changes from another branch into the current one. It prompts for
2260 specifics, e.g. a merge source.
2262 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2263 shows a diff while querying the user. It defaults to t.
2265 *** Log entries in some Log View buffers can be toggled to display a
2266 longer description by typing RET (log-view-toggle-entry-display).
2267 This is currently supported for Bzr, Git, and Mercurial (to support
2268 another backend, define a `log-view-expanded-log-entry-function').
2269 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2270 use this to display the full log entry for the revision at point.
2272 *** New command `vc-ediff' allows visual comparison of two revisions
2273 of a file similar to `vc-diff', but using ediff backend.
2275 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2276 this was not advertised at the time.
2278 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2279 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2280 this was not advertised at the time.
2286 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2288 *** partial-completion-mode (complete.el) is obsolete.
2289 You can get a comparable behavior with:
2290 (setq completion-styles '(partial-completion initials))
2291 (setq completion-pcm-complete-word-inserts-delimiters t)
2293 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2295 *** pgg is obsolete (use EasyPG instead).
2297 *** sregex.el is obsolete, since rx.el is a strict superset.
2299 *** s-region.el and pc-select.el are obsolete.
2300 They are superseded by shift-select-mode, enabled by default since 23.1.
2302 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2306 *** The Landmark game is now invoked with `landmark', not `lm'.
2307 Its functions and variables have been similarly renamed.
2309 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2310 (This interfered with cua-mode.)
2312 *** f90.el has some support for Fortran 2008 syntax.
2314 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2316 *** New command `nato-region' converts text to NATO phonetic alphabet.
2319 * New Modes and Packages in Emacs 24.1
2321 ** Occur Edit mode applies edits made in *Occur* buffers to the
2322 original buffers. It is bound to "e" in Occur mode.
2324 ** New global minor mode electric-pair-mode.
2325 When enabled, typing an open parenthesis automatically inserts the
2326 matching closing one.
2328 ** New global minor mode electric-indent-mode.
2329 When enabled, typing certain characters triggers reindentation.
2330 Major modes wishing to use this can set electric-indent-chars or
2331 electric-indent-functions.
2333 ** New global minor mode electric-layout-mode.
2334 When enabled, typing certain characters automatically inserts newlines.
2335 Major modes wishing to use this can set electric-layout-rules.
2337 ** tabulated-list.el provides a generic major mode for tabulated data,
2338 from which other modes can be derived.
2340 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2342 ** secrets.el is an implementation of the Secret Service API, an
2343 interface to password managers like GNOME Keyring or KDE Wallet. The
2344 Secret Service API requires D-Bus for communication. The command
2345 `secrets-show-secrets' offers a buffer with a visualization of the
2348 ** notifications.el provides an implementation of the Desktop
2349 Notifications API. It requires D-Bus for communication.
2351 ** soap-client.el supports access to SOAP web services from Emacs.
2352 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2354 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
2356 ** New emacs-lock.el package.
2357 The previous version has been moved to obsolete/old-emacs-lock.el.
2358 Now, there is a proper minor mode `emacs-lock-mode'. Protection
2359 against exiting Emacs and killing the buffer can be set separately.
2360 The mechanism for automatically turning off protection for buffers
2361 with dead inferior processes has been generalized.
2364 * Incompatible Lisp Changes in Emacs 24.1
2366 ** Passing a nil argument to a minor mode function call now ENABLES
2367 the minor mode unconditionally. This is so that you can write e.g.
2369 (add-hook 'text-mode-hook 'foo-mode)
2371 to enable foo-mode in Text mode buffers, removing the need for
2372 `turn-on-foo-mode' style functions. This affects all mode commands
2373 defined by `define-minor-mode'. If called interactively, the mode
2374 command still toggles the minor mode.
2376 ** The return value of `backup-buffer' has changed.
2377 It is now a list of three elements, where the second element is a list
2378 describing the original file's SELinux context. If Emacs or the
2379 system lacks SELinux support, the context list is (nil nil nil nil).
2380 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
2382 ** `char-direction-table' and the `char-direction' function were deleted.
2383 They were buggy and inferior to the new support of bidirectional
2384 editing introduced in Emacs 24. If you need the bidirectional
2385 properties of a character, use `get-char-code-property' with the last
2386 argument `bidi-class'.
2388 ** `copy-directory' now copies the source directory as a subdirectory
2389 of the target directory, if the latter is an existing directory. The
2390 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2391 the contents directly into a pre-existing target directory.
2393 ** For mouse click input events in the text area, the Y pixel
2394 coordinate in the POSITION list now counts from the top of the text
2395 area, excluding any header line. Previously, it counted from the top
2398 ** Support for "old-style" backquotes, obsolete for 10+ years, has
2399 been further reduced. Now a backquote not followed by a space is
2400 always treated as a "new-style" backquote. Please remove all
2401 "old-style" backquotes from your code. If your code uses backquotes
2402 as documented in the Elisp manual, and compiles without warning, then
2403 you have nothing to do in this regard. Code not following the
2404 appropriate conventions may fail to compile.
2406 The most common cause of trouble seems to be an old-style backquote
2407 followed by a newline. Another cause of trouble is vector notation
2408 for key sequence notation: instead of [(control ,)] and [(control ')],
2409 you should write [(control ?,)] and [(control ?')], which will work in
2412 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2413 was not advertised at the time. The function `custom-initialize-delay'
2414 replaced all known uses.
2416 ** `view-buffer' now treats special mode-class in the same way that
2417 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2418 major mode is special).
2420 ** Menu and tool bar changes
2422 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
2423 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2424 With these alist entries omitted, `make-frame' checks the value of the
2425 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2426 a menu-bar or tool-bar, respectively. If the alist entries are added,
2427 they override the value of `menu-bar-mode'/`tool-bar-mode'.
2429 *** The menu bar bindings's caches are not used any more.
2430 Use (where-is-internal <def> nil t) instead.
2432 ** Regions created by mouse dragging are now normal active regions,
2433 similar to those created by shift-selection (see Selection changes
2434 above). In previous Emacs versions, these regions were delineated by
2435 `mouse-drag-overlay'; that variable has been removed.
2437 ** The fourth argument of `filter-buffer-substring' has been removed.
2438 If you want to remove text properties from the final result, simply
2439 pass the result through substring-no-properties.
2441 ** cl.el no longer provides `cl-19'.
2443 ** The following obsolete functions and aliases have been removed
2444 (the appropriate new function is given in parentheses; "not needed"
2445 means you can just remove all calls to the function in question):
2447 *** `comint-kill-output' (`comint-delete-output')
2448 *** `decompose-composite-char' (`char-to-string')
2449 *** `outline-visible' (`outline-invisible-p')
2450 *** `internal-find-face' (`facep')
2451 *** `internal-get-face' (`facep and check-face')
2452 *** `frame-update-faces' (not needed)
2453 *** `frame-update-face-colors' (`frame-set-background-mode')
2454 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2455 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2456 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2457 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2458 *** `x-make-font-unbold' (`make-face-unbold')
2459 *** `x-make-font-unitalic' (`make-face-unitalic')
2460 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2461 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2462 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2463 *** `char-bytes' (== 1)
2464 *** `isearch-return-char' (`isearch-printing-char')
2465 *** `make-local-hook' (not needed)
2466 *** `set-screen-height' (`set-frame-height')
2467 *** `set-screen-width' (`set-frame-width')
2469 ** The following obsolete variables and varaliases have been removed
2470 (the appropriate new variable is given in parentheses):
2472 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2473 *** `vc-header-alist' (`vc-BACKEND-header')
2474 *** `directory-sep-char' (== ?/)
2475 *** `font-lock-defaults-alist' (`font-lock-defaults')
2476 *** `e' (`float-e').
2478 ** The following obsolete files were removed:
2479 sc.el, x-menu.el, rnews.el, rnewspost.el
2481 ** The format of the finder-inf.el file has changed, since the Finder
2482 mechanism is now based on the package system. The variable
2483 `finder-package-info' is replaced by `package--builtins' and
2484 `finder-keywords-hash'.
2486 ** When generating autoloads, `update-directory-autoloads' no longer
2487 assumes every inspected file is in your `load-path'. It instead
2488 generates relative names according to the current `load-path'.
2491 * Lisp Changes in Emacs 24.1
2493 ** Code can now use lexical scoping by default instead of dynamic scoping.
2494 The `lexical-binding' variable enables lexical scoping for local
2495 variables. It is typically set via a file-local variable in the first
2496 line of the file, in which case it applies to all the code in that
2499 *** `eval' takes a new optional argument `lexical' to choose the new lexical
2500 binding instead of the old dynamic binding mode.
2502 *** Lexically scoped interpreted functions are represented with a new form
2503 of function value which looks like (closure ENV ARGS &rest BODY).
2505 *** New macro `letrec' to define recursive local functions.
2507 *** `defvar' and `defconst' now mark the variable as special (dynamic).
2508 So do `defcustom' and other forms that call `defvar' as a subroutine.
2510 *** New function `special-variable-p' to check whether a variable is
2511 declared as dynamically bound.
2513 *** The form ((lambda ...) ...) is deprecated.
2515 ** An Emacs Lisp testing tool is now included.
2516 Emacs Lisp developers can use this tool to write automated tests for
2517 their code. See the ERT info manual for details.
2519 ** Changes for bidirectional display and editing
2521 *** New function `current-bidi-paragraph-direction'.
2522 This returns the base direction of the paragraph at point.
2524 *** New function `bidi-string-mark-left-to-right'.
2525 Given a string containing characters from right-to-left scripts, this
2526 function returns another string which can be safely inserted into a
2527 buffer, such that any following text will be always displayed to the
2528 right of that string. (This works by appending an invisible Unicode
2529 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
2531 This is useful when the buffer has overall left-to-right paragraph
2532 direction and you need to insert a string whose contents are not known
2533 in advance, without disrupting the layout of the line.
2537 *** Window tree functions are accessible in Elisp.
2538 Functions are provided to return the parent, siblings or child windows
2539 of any window including internal windows (windows not associated with a
2540 buffer) in the window tree.
2542 **** New function `window-valid-p' gives non-nil for live and internal
2545 **** Window manipulation can deal with internal windows.
2546 Many window handling functions like `split-window', `delete-window', or
2547 `delete-other-windows' as well as the window resizing functions can now
2548 act on any window including internal ones.
2550 *** window-total-height/-width vs window-body-height/-width.
2551 The function `window-height' has been renamed to `window-total-height'
2552 and `window-width' has been renamed to `window-body-width'. The old
2553 names are provided as aliases. Two new functions `window-total-width'
2554 and `window-body-height' are provided.
2556 *** Window parameters specific to window handling functions.
2557 For each window you can specify a parameter to override the default
2558 behavior of a number of functions like `split-window', `delete-window'
2559 and `delete-other-windows'. The variable `ignore-window-parameters'
2560 allows to ignore processing such parameters.
2562 *** New semantics of third argument of `split-window'.
2563 The third argument of `split-window' has been renamed to SIDE and can be
2564 set to any of the values 'below, 'right, 'above, or 'left to make the
2565 new window appear on the corresponding side of the window that shall be
2566 split. Any other value of SIDE will cause `split-window' to split the
2567 window into two side-by-side windows as before.
2569 *** Window resizing functions.
2570 A new standard function for resizing windows called `window-resize' has
2571 been introduced. This and all other functions for resizing windows no
2572 longer delete any windows when they become too small.
2574 *** Deleting the selected window now selects the most recently selected
2575 live window on that frame instead.
2577 *** `adjust-window-trailing-edge' adjustments.
2578 `adjust-window-trailing-edge' can now deal with fixed-size windows and
2579 is able to resize other windows if a window adjacent to the trailing
2580 edge cannot be shrunk any more. This makes its behavior more similar to
2581 that of Emacs 21 without compromising, however, its inability to delete
2582 windows which was introduced in Emacs 22.
2584 *** Window-local buffer lists.
2585 Windows now have local buffer lists. This means that removing a buffer
2586 from display in a window will preferably show the buffer previously
2587 shown in that window with its previous window-start and window-point
2588 positions. This also means that the same buffer may be automatically
2589 shown twice even if it already appears in another window.
2591 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2592 which if non-nil requires the buffer to be displayed in the currently
2593 selected window, signaling an error otherwise. If nil, another window
2594 can be used, e.g. if the selected one is strongly dedicated.
2596 *** `split-window-vertically' and `split-window-horizontally' renamed
2597 to `split-window-below' and `split-window-right' respectively.
2598 The old names are kept as aliases.
2602 **** The second arg to `display-buffer' and `pop-to-buffer' is now
2603 named ACTION, and takes a display action of the same form as
2604 `display-buffer-base-action' (see Changes, above). A non-nil,
2605 non-list value is treated specially, as the old meaning.
2607 **** New variable `display-buffer-overriding-action'.
2609 **** The procedure of `display-buffer' etc. to choose a window is
2610 determined by combining `display-buffer-overriding-action',
2611 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2612 and `display-buffer-fallback-action'. The second and fourth of these
2613 are user-customizable variables.
2615 See the docstring of `display-buffer' for details.
2617 *** New functions `window-state-get' and `window-state-put'.
2618 These functions allow to save and restore the state of an arbitrary
2619 frame or window as an Elisp object.
2623 *** New variable `completion-extra-properties' used to specify extra
2624 properties of the current completion:
2625 - :annotate-function, same as the old completion-annotate-function.
2626 - :exit-function, function to call after completion took place.
2628 *** Functions on `completion-at-point-functions' can return any of the
2629 properties valid for `completion-extra-properties'.
2631 *** `completion-annotate-function' is obsolete.
2633 *** New `metadata' method for completion tables. The metadata thus returned
2634 can specify various details of the data returned by `all-completions':
2635 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
2636 used to select a style in completion-category-overrides.
2637 - `annotation-function' to add annotations in *Completions*.
2638 - `display-sort-function' to specify how to sort entries in *Completions*.
2639 - `cycle-sort-function' to specify how to sort entries when cycling.
2641 *** `minibuffer-local-filename-must-match-map' is not used any more.
2642 Instead, the bindings in `minibuffer-local-filename-completion-map'
2643 are combined with `minibuffer-local-must-match-map'.
2645 *** New variable `completing-read-function' allows overriding the
2646 behavior of `completing-read'.
2648 ** `glyphless-char-display' can now distinguish between graphical and
2649 text terminal display, via a char-table entry that is a cons cell.
2651 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
2652 Instead, the offending function is removed.
2656 *** New function `run-hook-wrapped' for running an abnormal hook by
2657 passing the hook functions as arguments to a "wrapping" function.
2658 Like `run-hook-with-args-until-success', it stops at the first
2659 non-nil return value.
2661 *** New macro `with-wrapper-hook' for running an abnormal hook as a
2662 set of "wrapping" filters, similar to around advice.
2663 (A version of this macro was actually added in Emacs 23.2 but was not
2664 advertised at the time.)
2668 *** New macro `condition-case-unless-debug' (this was actually added in
2669 Emacs 23.1 as condition-case-no-debug, but not advertised)
2671 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
2673 *** Variable `stack-trace-on-error' removed.
2675 *** The debugger can now "continue" from an error, which means it will
2676 jump to the error handler as if the debugger had not been invoked
2677 instead of jumping all the way to the top-level.
2679 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
2680 This can be useful when `inhibit-quit' is set.
2682 ** The new function `server-eval-at' allows evaluation of Lisp forms on
2683 named Emacs server instances.
2685 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
2686 to redirect STDOUT to a file.
2688 ** The function `format-time-string' now supports the %N directive,
2689 for higher-resolution time stamps.
2691 ** New input reading functions
2693 *** New function `read-char-choice' reads a restricted set of
2694 characters, discarding any inputs not inside the set.
2696 *** The command `read-color' now requires a match for a color name
2697 or RGB triplet, instead of signaling an error if the user provides
2700 **** `facemenu-read-color' is now an alias for `read-color'.
2702 ** `image-library-alist' is renamed to `dynamic-library-alist'.
2703 The variable is now used to load all kind of supported dynamic libraries,
2704 not just image libraries. The previous name is still available as an
2707 ** Syntax parsing changes
2709 *** New variable `syntax-propertize-function'.
2710 This replaces `font-lock-syntactic-keywords' which is now obsolete.
2711 This allows syntax-table properties to be set independently from font-lock:
2712 just call syntax-propertize to make sure the text is propertized.
2713 Together with this new variable come a new hook
2714 syntax-propertize-extend-region-functions, as well as two helper functions:
2715 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
2716 as-is; and syntax-propertize-rules which provides a new way to specify
2719 *** Syntax tables support a new "comment style c" additionally to style b.
2721 ** New hook `post-self-insert-hook', run after `self-insert-command'.
2723 ** frame-local variables cannot be let-bound any more.
2725 ** Major and minor mode changes
2727 *** `set-auto-mode' now respects mode: local variables at the end of files,
2728 as well as those in the -*- line.
2730 *** `prog-mode' is a new major mode from which programming modes
2733 **** `prog-mode-hook' can be used to enable features for programming
2734 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
2735 on-the-fly spell checking for comments and strings.
2737 *** New hook `change-major-mode-after-body-hook', run by
2738 `run-mode-hooks' just before any other mode hooks.
2740 *** Enabled globalized minor modes can be disabled in specific major modes.
2741 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
2742 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
2744 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
2746 ** File-handling changes
2748 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
2749 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
2750 both non-nil. Interactively, TRASH defaults to t, unless a prefix
2751 argument is supplied (see Trash changes, above).
2753 *** New file predicates: `file-equal-p', `file-in-directory-p'.
2755 ** Tool-bars can display separators.
2756 Tool-bar separators are handled like menu separators in menu-bar maps,
2757 i.e. via menu entries of the form `(menu-item "--")'.
2761 *** Animated images support (currently animated gifs only).
2763 **** `image-animated-p' returns non-nil if an image can be animated.
2765 **** `image-animate' animates a supplied image spec.
2767 **** `image-animate-timer' returns the timer object for an image that
2770 *** `image-extension-data' has been renamed to `image-metadata'.
2771 The old name is an obsolete alias to the new one.
2773 *** Image mode can view any image type that ImageMagick supports.
2774 This requires Emacs to be built with ImageMagick support.
2776 **** New function `imagemagick-types', defined if ImageMagick support
2777 is enabled, returns a list of image file extensions that your
2778 ImageMagick installation supports.
2780 **** New function `imagemagick-register-types' enables ImageMagick
2781 image types in Image mode and in `create-image' and other helper
2784 **** New option `imagemagick-types-inhibit' excludes certain
2785 ImageMagick image types from `imagemagick-register-types'.
2787 **** With ImageMagick support, there are extra Image mode commands to
2788 resize and rotate images: `image-transform-fit-to-height',
2789 `image-transform-fit-to-width', `image-transform-set-rotation', and
2790 `image-transform-set-scale'.
2792 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
2793 passes it to the mail user agent function. This argument specifies an
2794 action for returning to the caller after finishing with the mail. For
2795 example, this is used by Rmail to optionally delete a mail window.
2797 ** XML and HTML parsing
2798 If Emacs is compiled with libxml2 support, there are two new
2799 functions: `libxml-parse-html-region' (which parses "real world" HTML)
2800 and `libxml-parse-xml-region' (which parses XML). Both return an
2801 Emacs Lisp parse tree.
2803 ** Networking and encryption changes
2805 *** `open-network-stream' can now be used to open an encrypted stream.
2806 It now accepts an optional `:type' parameter for initiating a TLS
2807 connection, directly or via STARTTLS. To do STARTTLS, additional
2808 parameters (`:end-of-command', `:success', `:capabilities-command')
2809 must also be supplied.
2811 *** New library gnutls.el.
2812 The new function `gnutls-available-p' returns non-nil if Emacs is
2813 built with GnuTLS support. The main entry points are
2814 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
2815 these functions through `open-network-stream', because that can
2816 upgrade connections through STARTTLS opportunistically or use plain
2817 SSL, depending on your needs. For debugging, set `gnutls-log-level'
2820 *** New primitive `secure-hash' that supports many secure hash algorithms:
2821 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
2822 sha1.el has been removed. The `sha1' feature is provided by default.
2826 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
2828 ** Progress reporters can now "spin".
2829 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
2830 now be nil, or omitted. This makes a "non-numeric" reporter. Each
2831 time you call `progress-reporter-update' on that progress reporter,
2832 with a nil or omitted VALUE argument, the reporter message is
2833 displayed with a "spinning bar".
2835 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
2836 being reverted, even if the buffer has a local `revert-buffer-function'.
2838 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
2839 If delayed-warnings-list is non-nil, the command loop calls
2840 `delayed-warnings-hook' after `post-command-hook'. At present, this
2841 is only used by Emacs on some platforms to display warnings during
2842 startup, which might otherwise not be noticed. This uses the
2843 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
2845 ** rx.el has a new `group-n' construct for explicitly numbered groups.
2847 ** New function `make-composed-keymap' that constructs a new keymap
2848 from multiple input maps. You can use this to make a keymap that
2849 inherits from multiple maps, eg:
2850 (set-keymap-parent newmap (make-composed-keymap othermap parent))
2852 ** New function `string-prefix-p'.
2853 (This was actually added in Emacs 23.2 but was not advertised at the time.)
2855 ** New reader macro ## that stands for the empty symbol.
2856 This means that the empty symbol can now be read back. Also, #: by itself
2857 (when not immediately followed by a possible symbol character) stands for
2858 an empty uninterned symbol.
2860 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
2862 ** The following functions and variables are obsolete:
2864 *** `tooltip-use-echo-area' is obsolete.
2865 Rather than setting this to t, disable Tooltip mode instead.
2867 *** buffer-substring-filters is obsolete.
2868 Use `filter-buffer-substring-functions' instead.
2870 *** `byte-compile-disable-print-circle' is obsolete.
2872 *** `deferred-action-list' and `deferred-action-function' are obsolete.
2873 Use `post-command-hook' instead.
2875 *** `font-lock-maximum-size' is obsolete.
2878 * Changes in Emacs 24.1 on Non-Free Operating Systems
2880 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
2881 and also when HOME is set to C:\ by default.
2883 ** New configure.bat options
2885 *** --enable-checking builds Emacs with extra runtime checks.
2887 *** --distfiles specifies files to be included in binary distribution.
2889 *** --without-gnutls disables automatic GnuTLS detection.
2891 *** --lib for general library linkage, works with the USER_LIBS build variable.
2893 ** New make target `dist' to create binary distribution for MS Windows.
2895 ** The Lisp function `w32-default-color-map' is now obsolete.
2896 (It is only used internally in the Emacs C code.)
2898 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
2899 reappear on mouse-over. (Requires OS X 10.6 or later.)
2901 ** On Mac OS X, dragging a file into Emacs visits the file, like on
2902 other platforms, rather than inserting its contents into the buffer.
2905 ----------------------------------------------------------------------
2906 This file is part of GNU Emacs.
2908 GNU Emacs is free software: you can redistribute it and/or modify
2909 it under the terms of the GNU General Public License as published by
2910 the Free Software Foundation, either version 3 of the License, or
2911 (at your option) any later version.
2913 GNU Emacs is distributed in the hope that it will be useful,
2914 but WITHOUT ANY WARRANTY; without even the implied warranty of
2915 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2916 GNU General Public License for more details.
2918 You should have received a copy of the GNU General Public License
2919 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2924 paragraph-separate: "[
\f]*$"