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 all necessary updates to the manuals in doc/ are complete.
19 --- means no change in the manuals is needed.
20 When you add a new item, use the appropriate mark if you know it applies,
21 otherwise leave it unmarked.
24 * Installation Changes in Emacs 24.4
26 ** Emacs can be compiled with 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 `--disable-acl'.
31 ** Emacs can be compiled with file notification support.
32 This happens by default if a suitable system library is found at
33 build time. To prevent this, use the configure option
34 `--with-file-notification-no'. See below for file-notify features.
35 FIXME? This feature is not available for the Nextstep port. (?)
37 ** The configure option `without-compress-info' has been generalized,
38 and renamed to `without-compress-install'. It now prevents compression
39 of _any_ files during installation.
41 ** The configure option --with-crt-dir has been removed.
42 It is no longer needed, as the crt*.o files are no longer linked
45 ** Directories passed to configure option `--enable-locallisppath' are
46 no longer created during installation.
48 ** Emacs can be compiled with zlib support. If this library is present
49 (which it normally is on most systems), the function
50 `zlib-decompress-region' becomes available, which can decompress gzip-
51 and zlib-format compressed data.
54 ** Emacs for NS (OSX, GNUStep) can be built with ImageMagick support.
55 pkg-config is required to find ImageMagick libraries.
57 ** For OSX >= 10.5, the Core text based font backend from the Mac port is used.
58 For GNUStep and OSX 10.4 the old backend is used.
59 To use the old backend by default, do on the command line:
60 % defaults write org.gnu.Emacs FontBackend ns
63 * Startup Changes in Emacs 24.4
66 * Changes in Emacs 24.4
68 ** Key ? also describes prefix bindings like C-h.
71 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
72 because it affects caching of paragraph scanning results as well.
75 ** `apropos-variable' is now `apropos-user-option'
76 `apropos-user-option' shows all user options while `apropos-variable'
77 shows all variables. When called with a universal prefix argument,
78 the two commands swap their behaviors. When `apropos-do-all' is
79 non-nil, they output the same results.
82 ** `eval-defun' on an already defined defcustom calls the :set function,
85 ** If the new variable `enable-dir-local-variables' is nil,
86 directory local variables are ignored. May be useful for some modes
87 that want to ignore directory-locals while still respecting file-locals.
89 ** The option `set-mark-default-inactive' has been deleted.
90 This unfinished feature was introduced by accident in Emacs 23.1;
91 simply disabling Transient Mark mode does the same thing.
93 ** `initial-buffer-choice' can now specify a function to set up the
96 ** The *Messages* buffer is created in a new major mode `messages-buffer-mode',
97 and read-only. Code that might create the *Messages* buffer should
98 call the function `messages-buffer' to do so and set the mode.
100 ** `remember-notes' creates a buffer whose content is saved on kill-emacs.
101 You may think of it as a *scratch* buffer whose content is preserved.
102 In fact, it was designed as a replacement for *scratch* buffer and can
103 be used that way by setting `initial-buffer-choice' to `remember-notes'
104 and `remember-notes-buffer-name' to "*scratch*". Without the second
105 change, *scratch* buffer will still be there for notes that do not
106 need to be preserved.
108 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
110 ** ACL support has been added.
112 *** Emacs preserves the ACL entries of files when backing up.
114 *** New functions `file-acl' and `set-file-acl' get and set the ACL
115 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
116 libacl. On MS-Windows, the NT Security APIs are used to emulate the
117 POSIX ACL interfaces.
119 ** New option `scroll-bar-adjust-thumb-portion'.
120 Available only on X, this option allows to control over-scrolling
121 using the scroll bar (i.e. dragging the thumb down even when the end
122 of the buffer is visible).
124 ** New function `add-face-text-property' has been added, which can be
125 used to conveniently prepend/append new face attributes to text.
127 ** In compiled Lisp files, the header no longer includes a timestamp.
129 ** Multi-monitor support has been added.
131 *** New functions `display-monitor-attributes-list' and
132 `frame-monitor-attributes' can be used to obtain information about
133 each physical monitor on multi-monitor setups.
135 *** The functions `display-pixel-width' and `display-pixel-height' now
136 behave consistently among the platforms: they return the pixel width
137 or height for all physical monitors associated with the given display
138 as just they were on X11. To get information for each physical
139 monitor, use the new functions above. Similar notes also apply to
140 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
141 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
143 ** New macro `alternatives-define' can be used to define generic commands.
144 Generic commands are interactive functions whose implementation can be
145 selected among several alternatives, as a matter of user preference.
147 ** The blink cursor stops blinking after 10 blinks (default) on X and NS.
148 You can change the default by customizing the variable blink-cursor-blinks.
149 Also timers for blinking are stopped when no blinking is done, so Emacs does
150 not consume CPU cycles.
152 ** New command `frameset-to-register' is now bound to `C-x r f', replacing
153 `frame-configuration-to-register'. It offers similar functionality, plus
154 some enhancements, like the ability to restore deleted frames. Command
155 `frame-configuration-to-register' is still available, but unbound.
158 * Editing Changes in Emacs 24.4
160 ** `split-window' is no longer a command, just a non-interactive function.
161 As a command it was a special case of `split-window-below', and as such
162 superfluous. After being reimplemented in Lisp, its interactive form
163 was mistakenly retained.
165 ** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
166 bound to <f11> and M-<f10>, respectively.
168 ** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
172 ** New option `visual-order-cursor-movement'.
173 If this is non-nil, cursor motion with arrow keys will follow the
174 visual order of characters on the screen: <left> always moves to the
175 left, <right> always moves to the right, disregarding the surrounding
176 bidirectional context.
178 ** New command `kmacro-to-register' to store keyboard macros in registers.
182 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
183 You can pick the name of the function and the variables with `C-x 4 a'.
186 * Changes in Specialized Modes and Packages in Emacs 24.4
188 ** The debugger's `e' command evaluates the code in the context at point.
189 This includes using the lexical environment at point, which means that
190 `e' now lets you access lexical variables as well.
192 ** `eshell' now supports visual subcommands and options
193 Eshell has been able to handle "visual" commands (interactive,
194 non-line oriented commands such as top that require display
195 capabilities not provided by eshell) by running them in an Emacs
196 terminal emulator. See `eshell-visual-commands'.
198 This feature has been extended to subcommands and options that make a
199 usually line-oriented command a visual command. Typical examples are
200 "git log" and "git <command> --help" which display their output in a
201 pager by default. See `eshell-visual-subcommands' and
202 `eshell-visual-options'.
204 ** If your Emacs is compiled with libxml2 support, you can use the new
205 built-in web browser `eww'.
207 ** `remember' can now store notes in separates files
208 You can use the new function `remember-store-in-files' within the
209 `remember-handler-functions' option.
211 See `remember-data-directory' and `remember-directory-file-name-format'
212 for new options related to this function.
214 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
216 ~/.emacs.d/timelog replaces ~/.timelog
217 ~/.emacs.d/vip replaces ~/.vip
218 ~/.emacs.d/viper replaces ~/.viper
219 ~/.emacs.d/ido.last replaces ~/.ido.last
220 ~/.emacs.d/kkcrc replaces ~/.kkcrc
221 ~/.emacs.d/quickurls replaces ~/.quickurls
222 ~/.emacs.d/idlwave replaces ~/.idlwave
223 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
224 ~/.emacs.d/places replaces ~/.emacs-places
225 ~/.emacs.d/shadows replaces ~/.shadows
226 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
227 ~/.emacs.d/strokes replaces ~/.strokes
228 ~/.emacs.d/notes replaces ~/.notes
229 ~/.emacs.d/type-break replaces ~/.type-break
230 Also the following files used by the now obsolete otodo-mode.el:
231 ~/.emacs.d/todo-do replaces ~/.todo-do
232 ~/.emacs.d/todo-done replaces ~/.todo-done
233 ~/.emacs.d/todo-top replaces ~/.todo-top
236 ** Delphi mode is now called OPascal mode.
237 *** All delphi-* variables and functions have been renamed to opascal-*.
238 *** `delphi-newline-always-indents' is not supported any more.
239 Use `electric-indent-mode' instead.
240 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
242 ** Eldoc Mode works properly in the minibuffer.
244 ** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
246 ** completing-read-multiple's separator can now be a regexp.
247 The default separator is changed to allow surrounding spaces around the comma.
251 *** Battery information via the BSD `apm' utility is now supported.
255 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
257 ** Calendar and Diary
259 *** New faces: `calendar-weekday-header', `calendar-weekend-header',
260 `calendar-month-header'.
262 *** New option `calendar-day-header-array'.
264 *** The variable `calendar-font-lock-keywords' is obsolete.
267 *** New variable `diary-from-outlook-function', used by the command
268 `diary-from-outlook'.
270 ** VC and related modes
272 *** In VC directory mode, `D' displays diffs between VC-controlled
273 whole tree revisions.
275 *** In VC directory mode, `L' lists the change log for the current VC
276 controlled tree in a window.
278 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
279 under current version control system. When called with a prefix
280 argument, you can remove a file from the ignored file list.
284 *** New macro cl-tagbody.
287 *** letf is now just an alias for cl-letf.
291 *** Calc by default now uses the Gregorian calendar for all dates, and
292 uses January 1, 1 AD as its day number 1. Previously Calc used the
293 Julian calendar for dates before September 14, 1752, and it used
294 December 31, 1 BC as its day number 1; the new scheme is more
295 consistent with Calendar's calendrical system and day numbering.
297 *** The new variable `calc-gregorian-switch' lets you configure the
298 date when Calc switches from the Julian to the Gregorian calendar.
299 Nil, the default value, means to always use the Gregorian calendar.
300 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
303 *** Support for ISO 8601 dates.
307 *** `desktop-auto-save-timeout' defines the number of seconds between
308 auto-saves of the desktop.
310 *** `desktop-restore-frames', enabled by default, allows saving and
311 restoring the frame/window configuration (frameset). Additional options
312 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
313 and `desktop-restore-forces-onscreen' offer further customization.
317 *** New minor mode `dired-hide-details-mode' hides details.
321 *** New option `erc-accidental-paste-threshold-seconds'.
322 If set to a number, this can be used to avoid accidentally paste large
323 amounts of data into the ERC input.
327 *** New option `epa-mail-aliases'.
329 You can set this to a list of alias expansions for keys to use
330 in `epa-mail-encrypt'.
332 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
333 that means: when one of the recipients of the message being encrypted
334 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
336 If one element of the variable's value is ("foo@bar.com"),
337 that means: when one of the recipients of the message being encrypted
338 is `foo@bar.com', ignore that name as regards encryption.
339 This is useful to avoid a query when you have no key for that name.
342 ** New F90 mode option `f90-smart-end-names'.
344 ** Icomplete is a bit more like Ido.
345 *** key bindings to navigate through and select the completions.
346 *** The icomplete-separator is customizable, and its default has changed.
347 *** Removed icomplete-show-key-bindings.
348 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
349 (setq icomplete-with-completion-tables '(internal-complete-buffer))
350 will revert to the old behavior.
354 *** Ido has a manual now.
355 *** `ido-use-virtual-buffers' takes a new value 'auto.
356 *** `ido-decorations' has been slightly extended to give a bit more control.
360 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
361 visit the next image file and the previous image file in the same
362 directory, respectively.
364 *** New commands to show specific frames of multi-frame images.
365 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
366 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
368 *** New commands to speed up, slow down, or reverse animation.
371 *** The command `image-mode-fit-frame' deletes other windows.
372 When toggling, it restores the frame's previous window configuration.
373 It also has an optional frame argument, which can be used by Lisp
374 callers to fit the image to a frame other than the selected frame.
378 *** New face `info-index-match' is used to highlight matches in index
379 entries displayed by `Info-index-next', `Info-virtual-index' and
384 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
385 will cycle through faces in `hi-lock-face-defaults' without prompting.
388 *** New global command `M-s h .' (`highlight-symbol-at-point')
389 highlights the symbol found near point without prompting,
390 using the next face automatically.
392 ** Search and Replace
394 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
395 starts a symbol (identifier) incremental search forward with the
396 symbol found near point added to the search string initially.
398 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
399 and adds it to the search string.
401 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
402 between nil and the value of the option `search-invisible' (or `open'
405 *** `query-replace' skips invisible text when `search-invisible' is nil,
406 and opens overlays with hidden text when `search-invisible' is `open'.
409 *** By default, prefix arguments do not now terminate Isearch mode.
410 Set `isearch-allow-prefix' to nil to restore old behavior.
412 *** More Isearch commands accept prefix arguments, namely
413 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
416 *** Word search now matches whitespace at the beginning/end
417 of the search string if it contains leading/trailing whitespace.
418 In an incremental word search or when using a non-nil LAX argument
419 of `word-search-regexp', the lax matching can also match part of
420 the first word (in addition to the lax matching of the last word).
421 The same rules are now applied to the symbol search with the difference
422 that it matches symbols, and non-symbol characters between symbols.
424 ** MH-E has been updated to MH-E version 8.5.
425 See MH-E-NEWS for details.
428 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
429 Customize `unrmail-mbox-format' to change this.
432 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
433 of how Rmail displays non-MIME messages.
436 ** New function `ses-rename-cell' to give SES cells arbitrary names.
438 ** trace-function was largely rewritten.
439 New features include:
440 - no prompting for the destination buffer, unless a prefix-arg was used.
441 - additionally to prompting for a destination buffer, when a prefix-arg is
442 used, the user can enter a "context", i.e. Lisp expression whose value at the
443 time the function is entered/exited will be printed along with the function
444 name and arguments. Useful to trace the value of (current-buffer) or
445 (point) when the function is invoked.
447 ** New command `delete-duplicate-lines' has new types of operation:
448 When its arg ADJACENT is non-nil (when called interactively with C-u C-u)
449 it works like the utility `uniq'. Otherwise by default it deletes
450 duplicate lines everywhere in the region without regard to adjacency.
451 When its arg KEEP-BLANKS is non-nil (when called interactively with
452 C-u C-u C-u), duplicate blank lines are preserved.
454 ** New `cycle-spacing' command allows cycling between having just one
455 space, no spaces, or reverting to the original spacing. Like
456 `just-one-space' command it can handle or ignore newlines and
457 leave different number of spaces.
459 ** Todo mode has been rewritten and enhanced.
460 New features include:
461 - support for multiple todo files and archive files of done items;
462 - renaming, reordering, moving, merging, and deleting categories;
463 - sortable tabular summaries of categories and the types of items they contain;
464 - cross-category lists of items filtered by specific criteria;
465 - more fine-grained interaction with the Emacs diary, by being able to decide
466 for each todo item whether it appears in the Fancy Diary display;
467 - highly flexible new item insertion and item editing;
468 - moving items between categories, storing done items in their category or in
469 archive files, undoing or unarchiving done items;
470 - reprioritizing items by inputting a numerical priority;
471 - extensive customizability of operation and display, including numerous faces.
472 The Todo mode user manual describes all commands and most user options.
473 To support some of these features, a new file format is used, which is
474 incompatible with the old format; however, you can convert old todo and done
475 item files to the new format on initializing the first new todo file, or at any
476 later time with the provided conversion command. The old version of
477 todo-mode.el has been made obsolete and renamed otodo-mode.el.
481 *** The experimental url syntax for remote file names is withdrawn.
484 *** New connection method "adb", which allows to access Android
485 devices by the Android Debug Bridge. The variable `tramp-adb-program'
486 can be used to adapt the path of the "adb" program, if needed.
488 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
489 "scpc" and "rsyncc" are discontinued. The ssh option
490 "ControlMaster=auto" is set automatically in all ssh-based methods,
494 *** Handlers for `file-acl' and `set-file-acl' for remote machines
495 which support POSIX ACLs.
498 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
499 for remote machines which support filesystem notifications.
503 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
505 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
509 *** The commands `woman-default-faces' and `woman-monochrome-faces'
510 are obsolete. Customize the `woman-*' faces instead.
514 *** Added Eshell-Tramp module
515 External su and sudo commands are now the default; the internal,
516 Tramp-using variants can still be used by enabling the eshell-tramp
519 ** New term.el option `term-suppress-hard-newline'.
521 ** Obsolete packages:
523 *** longlines.el is obsolete; use visual-line-mode instead.
528 *** terminal.el is obsolete; use term.el instead.
530 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
535 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
538 *** The Info-edit command is obsolete. Editing Info nodes by hand
539 has not been relevant for some time.
543 *** `explicit-bash-args' now always defaults to use --noediting.
544 During initialization, Emacs no longer expends a process to decide
545 whether it is safe to use Bash's --noediting option. These days
546 --noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
549 * New Modes and Packages in Emacs 24.4
551 ** New `superword-mode' in subword.el
552 `superword-mode' overrides the default word motion commands to treat
553 symbol_words as a single word, similar to what `subword-mode' does and
554 using the same internal functions.
556 ** New nadvice.el package offering lighter-weight advice facilities.
558 - add-function/remove-function which can be used to add/remove code on any
559 function-carrying place, such as process-filters or `<foo>-function' hooks.
560 - advice-add/advice-remove to add/remove a piece of advice on a named function,
561 much like `defadvice' does.
563 ** New frameset.el package.
564 It provides a set of operations to save a frameset (the state of all
565 or a subset of the existing frames and windows, somewhat similar to a
566 frame configuration), both in-session and persistently, and restore it
567 at some point in the future.
570 ** The package filenotify.el provides an interface for file system
571 notifications. It requires, that Emacs is compiled with one of the
572 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
575 * Incompatible Lisp Changes in Emacs 24.4
577 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
579 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
580 Some languages match those as »...« and others as «...» so better stay neutral.
582 ** The default file coding for Emacs Lisp files is now utf-8.
583 (See file-coding-system-alist.) In most cases, this change is transparent, but
584 files that contain unusual characters without specifying an explicit coding
585 system may fail to load with obscure errors.
586 You should either convert them to utf-8 or add an explicit `coding:' cookie.
588 ** overriding-terminal-local-map does not replace the local keymaps any more.
589 It used to disable the minor mode, major mode, and text-property keymaps,
590 whereas now it simply has higher precedence.
592 ** Default process filters and sentinels are not nil any more.
593 Instead they default to a function which does what the nil value used to do.
595 ** `read-event' does not return decoded chars in ttys any more.
596 Just as was the case in Emacs-22 and before, decoding of tty input according to
597 keyboard-coding-system is not performed in read-event any more. But contrary
598 to that past, it is still done before input-decode-map/function-key-map/...
600 ** Removed inhibit-local-menu-bar-menus.
602 ** frame-local variables that affect redisplay do not work any more.
603 More specifically, the redisplay does not bother to check for a frame-local
604 value when looking up variables.
606 ** nil and "unbound" are indistinguishable in symbol-function.
607 `symbol-function' never signals `void-function' any more.
608 `fboundp' returns non-nil if the symbol was `fset' to nil.
610 ** `defadvice' does not honor the `freeze' flag and cannot advise
611 special-forms any more.
613 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
614 VAR was bound to nil which was not tremendously useful and just lead to
615 spurious warnings about an unused var.
617 ** The return value of `backup-buffer' has changed.
618 The second argument is no longer an SELinux context, instead it is an
619 alist of extended attributes as returned by the new function
620 `file-extended-attributes'. The attributes can be applied to another
621 file using `set-file-extended-attributes'.
623 ** `visited-file-modtime' now returns -1 for nonexistent files.
624 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
625 in the presence of files with negative time stamps.
627 ** The cars of the elements in `interpreter-mode-alist' are now treated
628 as regexps rather than literal strings. Technically this is an
629 incompatible change, but unless you are using interpreter-mode-alist
630 for something (not just adding elements to it), it ought not to affect you.
633 * Lisp Changes in Emacs 24.4
635 ** Comparison functions =, <, >, <=, >= now take many arguments.
637 ** The second argument of `eval' can now be a lexical-environment.
639 ** `with-demoted-errors' takes an additional argument `format'.
641 ** New function `define-error'.
643 ** New hook `tty-setup-hook'.
646 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
648 ** Obsoleted functions:
651 *** `lisp-complete-symbol'
653 *** `minibuffer-completion-contents'
654 *** `isearch-nonincremental-exit-minibuffer'
655 *** `isearch-filter-visible'
656 *** `generic-make-keywords-list'
658 ** `with-wrapper-hook' is obsoleted by `add-function'.
659 The few hooks that used with-wrapper-hook are replaced as follows:
660 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
661 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
662 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
664 ** `split-string' now takes an optional argument TRIM.
665 The value, if non-nil, is a regexp that specifies what to trim from
666 the start and end of each substring.
668 ** `get-upcase-table' is obsoleted by the new `case-table-get-table'.
670 ** Support for filesystem notifications.
671 Emacs now supports notifications of filesystem changes, such as
672 creation, modification, and deletion of files. This requires the
673 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
674 MS-Windows systems, this is supported for Windows XP and newer
677 ** Changes in autorevert.el
680 *** If Emacs is compiled with file notification support, notifications
681 are used instead of checking the time stamp of the files. You can
682 disable this by setting the user option `auto-revert-use-notify' to
683 nil. Alternatively, a regular expression of directories to be
684 excluded from file notifications can be specified by
685 `auto-revert-notify-exclude-dir-regexp'.
688 *** The new user option `auto-revert-remote-files' enables reversion
689 of remote files when set to non-nil.
693 *** The function `face-spec-set' is now analogous to `setq' for face specs.
694 Its third arg now accepts values specifying exactly which face spec to
695 set (defface, custom, or user spec), and it directly sets the relevant
696 property using the supplied face spec.
698 *** Face specs set via Custom themes now replace the `defface' spec
699 rather than inheriting from it (as do face specs set via Customize).
701 *** New face characteristic (supports :underline (:style wave))
702 specifies whether or not the terminal can display a wavy line.
707 *** `image-animated-p' is now `image-multi-frame-p'.
708 It returns non-nil for any image that contains multiple frames,
709 whether or not it specifies a frame delay.
712 *** When animating images that do not specify a frame delay,
713 Emacs uses `image-default-frame-delay'.
716 *** New functions `image-current-frame' and `image-show-frame' for getting
717 and setting the current frame of a multi-frame image.
719 *** You can change the speed of animated images.
721 ** Changes in encoding and decoding of text
724 *** New coding-system `prefer-utf-8'.
725 This is like `undecided' but prefers UTF-8 on decoding if the text to
726 be decoded does not contain any invalid UTF-8 sequences. On encoding,
727 any non-ASCII characters are automatically encoded as UTF-8.
730 *** New attributes of coding-systems whose type is `undecided'.
731 Two new attributes, `:inhibit-null-byte-detection' and
732 `:inhibit-iso-escape-detection', determine how to detect encoding of
733 text that includes null bytes and ISO-2022 escape sequences,
734 respectively. Each of these attributes can be either nil, zero, or
735 t. If it is t, decoding text ignores null bytes and, respectively,
736 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
737 with no-conversion and ISO-2022 sequences cause Emacs to assume the
738 text is encoded in one of the ISO-2022 encodings, such as
739 iso-2022-7bit. If the value is zero, Emacs consults the variables
740 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
742 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
743 UTF-8 encoding and decoding, whenever possible.
745 These attributes are only meaningful for coding-systems of type
746 `undecided'. (The type of a coding-system is determined by its
747 `:coding-type' attribute and can be accessed by calling the
748 `coding-system-type' function.)
750 ** The function `set-visited-file-modtime' now accepts a 0 or -1 argument
751 with the same interpretation as the returned value of `visited-file-modtime'.
753 ** time-to-seconds is not obsolete any more.
754 ** New functions special-form-p and macrop.
755 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
756 text-property on the first char.
758 ** The `defalias-fset-function' property lets you catch calls to defalias
759 and redirect them to your own function instead of `fset'.
761 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
762 When you edit DIR/FILE, Emacs normally creates a symbolic link
763 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
764 is being edited. Formerly, if there was already a non-symlink file
765 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
766 through DIR/.#FILE.9. These fallbacks have been removed, so that
767 Emacs now no longer locks DIR/FILE in that case.
769 On file systems that do not support symbolic links, the lock is now a
770 regular file with contents being what would have been in the symlink.
772 ** The 9th element returned by `file-attributes' is now unspecified.
773 Formerly, it was t if the file's gid would change if file were deleted
774 and recreated. This value has been inaccurate for years on many
775 platforms, and nobody seems to have noticed or cared.
777 ** The function `file-ownership-preserved-p' now has an optional
778 argument GROUP which causes it check for file group too. This can be
779 used in place of the 9th element of `file-attributes'.
781 ** New functions `group-gid' and `group-real-gid'.
783 ** The 6th argument to `copy-file' has been renamed to
784 `preserve-extended-attributes' as it now handles both SELinux context
787 ** The `common-substring' argument of display-completion-list is obsolete.
788 Either use `completion-all-completions' which already returns highlighted
789 strings (including for partial or substring completion) or call
790 `completion-hilit-commonality' to add the highlight.
792 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
794 *** The package descriptor and name of global variables, constants,
795 and functions should be separated by two hyphens if the symbol is not
796 meant to be used by other packages.
799 * Changes in Emacs 24.4 on Non-Free Operating Systems
801 ** The procedure for building Emacs on MS-Windows has changed.
802 It is now built by running the same configure script as on all other
803 platforms. This requires the MSYS environment and MinGW development
804 tools. See the updated instructions in nt/INSTALL for details.
806 Using the Posix configure script and Makefile's also means a change in
807 the directory structure of the Emacs installation on Windows. It is
808 now the same as on GNU and Unix systems. In particular, the auxiliary
809 programs, such as cmdproxy.exe and hexl.exe, are in
810 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
811 version), version-independent site-lisp is in share/emacs/site-lisp,
812 version-specific Lisp files are in share/emacs/VERSION/lisp and in
813 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
814 files are in share/emacs/VERSION/etc. (Emacs knows about all these
815 directories and will find the files in there automatically; there's no
816 need to set any variables due to this change.)
819 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
820 The backtrace is written to the 'emacs_backtrace.txt' file in the
821 directory where Emacs was running.
824 ** The variable `buffer-file-type' is no longer supported.
825 Setting it has no effect, and %t in the mode-line format is ignored.
826 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
827 modifying it has no effect.
830 ** Lock files now work on MS-Windows.
831 This allows to avoid losing your edits if the same file is being
832 edited in another Emacs session or by another user. See the node
833 "Interlocking" in the Emacs User Manual for the details. To disable
834 file locking, customize `create-lockfiles' to nil.
836 ** Improved fullscreen support on Mac OS X.
837 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
838 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
839 native is the default.
842 * Installation Changes in Emacs 24.3
844 ** The default X toolkit is now Gtk+ version 3.
845 If you don't pass `--with-x-toolkit' to configure, or if you use
846 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
847 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
848 You can explicitly require a specific version by passing
849 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
851 ** New configure option `--enable-link-time-optimization', to utilize
852 an appropriate feature provided by GCC since version 4.5.0.
854 ** New configure option `--without-all' to disable most of the optional
855 features (image support, etc.) that are normally enabled by default.
857 ** New configure option `--enable-gcc-warnings' (for developing/debugging
858 Emacs). If building with GCC, this enables compile-time checks that
859 warn/give errors about possibly-questionable C code. On a recent GNU
860 system there should be no warnings; on older and on non-GNU systems
861 the results may be useful to developers.
863 ** The configure option `--enable-use-lisp-union-type' has been
864 renamed to `--enable-check-lisp-object-type', as the resulting
865 Lisp_Object type no longer uses a union to implement the compile time
866 check that this option enables.
868 ** The configure option `--disable-maintainer-mode' has been removed,
869 as it was confusingly-named and rarely useful.
871 ** The configure options `--program-prefix', `--program-suffix', and
872 `--program-transform-name' apply to more than just the installed
873 binaries. Now they also affect the man pages, icons, and the
874 etc/emacs.desktop file; but not the info pages, since this would break
875 links between the various manuals.
877 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
878 overwriting "emacs" in the installation bin/ directory with a link
881 ** Emacs uses libtinfo in preference to libncurses, if available.
883 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
884 /usr/pkg/lib to the linker search path. You must add them yourself if
887 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
888 (from the bin and libexec directories, respectively). The former is
889 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
892 * Startup Changes in Emacs 24.3
894 ** Emacs no longer searches for `leim-list.el' files beneath the standard
895 lisp/ directory. There should not be any there anyway. If you have
896 been adding them there, put them somewhere else; e.g., site-lisp.
898 ** The `--no-site-lisp' command line option now works for Nextstep builds.
901 * Changes in Emacs 24.3
905 *** `C-h f' (`describe-function') can now perform autoloading.
906 When this command is called for an autoloaded function whose docstring
907 contains a key substitution construct, that function's library is
908 automatically loaded, so that the documentation can be shown
909 correctly. To disable this, set `help-enable-auto-load' to nil.
911 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
912 even after their associated libraries have been loaded (and the
913 autoloads have been redefined as functions).
917 *** Images displayed via ImageMagick now support transparency and the
918 :background image specification property.
920 *** When available, ImageMagick support is automatically enabled.
921 It is no longer necessary to call `imagemagick-register-types'
922 explicitly to install ImageMagick image types; that function is called
923 automatically at startup, or when customizing an imagemagick- option.
925 *** Setting `imagemagick-types-inhibit' to t now disables the use of
926 ImageMagick to view images. (You must call `imagemagick-register-types'
927 afterwards if you do not use customize to change this.)
929 *** The new variable `imagemagick-enabled-types' also affects which
930 ImageMagick types are treated as images. The function
931 `imagemagick-filter-types' returns the list of types that will be
934 *** ImageMagick images now support the :max-width and :max-height
937 *** Some data types aren't auto-detected by ImageMagick. Adding
938 :format to `create-image' may help if the content type is in the
939 new variable `image-format-suffixes'.
943 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
944 next and previous path separator, respectively.
946 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
947 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
948 non-nil before enabling the mode.
952 *** New option `mode-line-default-help-echo' specifies the help text
953 (shown in a tooltip or in the echo area) for any part of the mode line
954 that does not have its own specialized help text.
956 *** You can now click mouse-3 in the coding system indicator to invoke
957 `set-buffer-file-coding-system'.
961 *** emacsclient now obeys string values for `initial-buffer-choice',
962 if it is told to open a new frame without specifying any file to visit
963 or expression to evaluate.
965 *** New option `server-auth-key' specifies a shared server key.
967 ** Emacs now generates backtraces on fatal errors.
968 On encountering a fatal error, Emacs now outputs a textual description
969 of the fatal signal, and a short backtrace on platforms like glibc
970 that support backtraces.
972 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
973 This minor mode replaces `toggle-read-only', which is now obsolete.
975 ** Most `y-or-n' prompts now allow you to scroll the selected window.
976 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
977 respectively, without exiting from the prompt.
979 ** In the Package Menu, newly-available packages are listed as "new",
980 and sorted above the other "available" packages by default.
982 ** If your Emacs was built from a bzr checkout, the new variable
983 `emacs-bzr-version' contains information about the bzr revision used.
985 ** New option `create-lockfiles' specifies usage of lockfiles.
986 It defaults to t. Changing it to nil inhibits the creation of lock
987 files (use this with caution).
989 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
990 variables on remote hosts.
992 ** The entry for PCL-CVS has been removed from the Tools menu.
993 The PCL-CVS commands are still available via the keyboard.
995 ** Using "unibyte: t" in Lisp source files is obsolete.
996 Use "coding: raw-text" instead.
998 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
999 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1000 The previous binding, introduced in Emacs 24.1, was a mistake, because
1001 `C-c LETTER' bindings are reserved for user customizations.
1003 ** Internationalization
1005 *** New language environment: Persian.
1007 *** New input method `vietnamese-vni'.
1009 ** Nextstep (GNUstep / Mac OS X) port
1011 *** Support for fullscreen and the frame parameter fullscreen.
1013 *** A file dialog is used for open/save operations initiated from the
1017 * Editing Changes in Emacs 24.3
1019 ** Search and Replace
1021 *** Non-regexp Isearch now performs "lax" space matching.
1022 Each sequence of spaces in the supplied search string may match any
1023 sequence of one or more whitespace characters, as specified by the
1024 variable `search-whitespace-regexp'. (This variable is also used by a
1025 similar existing feature for regexp Isearch.)
1027 *** New Isearch command `M-s SPC' toggles lax space matching.
1028 This applies to both ordinary and regexp Isearch.
1030 *** New option `replace-lax-whitespace'.
1031 If non-nil, `query-replace' uses flexible whitespace matching too.
1034 *** Global `M-s _' starts a symbol (identifier) incremental search,
1035 and `M-s _' in Isearch toggles symbol search mode.
1036 `M-s c' in Isearch toggles search case-sensitivity.
1038 ** Navigation commands
1040 *** New binding `M-g c' for `goto-char'.
1042 *** New binding `M-g TAB' for `move-to-column'.
1044 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1045 interactively with no prefix arg. Previously, it moved to column 1.
1047 ** New option `yank-handled-properties' allows processing of text
1048 properties on yanked text, in ways that are more general than just
1049 removing them (as is done by `yank-excluded-properties').
1051 ** New option `delete-trailing-lines' specifies whether
1052 M-x delete-trailing-whitespace should delete trailing lines at the end
1053 of the buffer. It defaults to t.
1055 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1057 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1058 `ucs-insert' is now an obsolete alias for `insert-char'.
1060 ** The `z' key no longer has a binding in most special modes.
1061 It used to be bound to `kill-this-buffer', but `z' is too easy to
1064 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1065 It copies the region-rectangle as the last rectangle kill.
1069 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1071 *** New option `register-separator' specifies the register containing
1072 the text to put between collected texts for use with
1073 M-x append-to-register and M-x prepend-to-register.
1076 * Changes in Specialized Modes and Packages in Emacs 24.3
1078 ** Common Lisp emulation (CL)
1080 *** CL's main entry is now (require 'cl-lib).
1081 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1082 i.e., all its definitions have the "cl-" prefix (and internal definitions
1083 use the "cl--" prefix).
1085 If `cl' provided a feature under the name `foo', then `cl-lib'
1086 provides it under the name `cl-foo' instead; with the exceptions of the
1087 few `cl' definitions that had to use `foo*' to avoid conflicts with
1088 pre-existing Elisp entities. These have been renamed to `cl-foo'
1089 rather than `cl-foo*'.
1091 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1092 provide the old, non-prefixed names. Some exceptions are listed below:
1094 *** `cl-flet' is not like `flet' (which is deprecated).
1095 Instead it obeys the behavior of Common-Lisp's `flet'.
1096 In particular, in cl-flet function definitions are lexically scoped,
1097 whereas in flet the scoping is dynamic.
1099 *** `cl-labels' is slightly different from `labels'.
1100 The difference is that it relies on the `lexical-binding' machinery
1101 (as opposed to the `lexical-let' machinery used previously) to capture
1102 definitions in closures, so such closures will only work if `lexical-binding'
1105 *** `cl-letf' is not exactly like `letf'.
1106 The only difference is in details that relate to some deprecated usage
1107 of `symbol-function' in place forms.
1109 *** `progv' was rewritten to use the `let' machinery.
1110 A side effect is that variables without corresponding values are bound
1111 to nil rather than being made unbound.
1113 *** The following methods of extending `setf' are obsolete
1114 (use features from gv.el instead):
1115 `define-modify-macro' (use `gv-letplace')
1116 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1117 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1118 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1122 *** Changes are now highlighted using the same color scheme as in
1123 modern VCSes. Deletions are displayed in red (new faces
1124 `diff-refine-removed' and `smerge-refined-removed', and new definition
1125 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1126 and `smerge-refined-added', and new definition of `diff-added').
1128 *** The variable `diff-use-changed-face' defines whether to use the
1129 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1130 changes in context diffs.
1132 *** The new command `diff-delete-trailing-whitespace' removes trailing
1133 whitespace introduced by a diff.
1135 ** Ediff now uses the same color scheme as Diff mode.
1139 A new version of python.el, which provides several new features, including:
1140 per-buffer shells, better indentation, Python 3 support, and improved
1141 shell-interaction compatible with iPython (and virtually any other
1144 *** Some user options have been replaced/renamed, including (old -> new):
1145 **** python-indent -> python-indent-offset
1146 **** python-guess-indent -> python-indent-guess-indent-offset
1147 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1148 **** python-use-skeletons -> python-skeleton-autoinsert
1150 *** Some user options have been removed, including:
1152 **** `python-indent-string-contents': Strings are never indented.
1154 **** `python-honour-comment-indentation':
1155 Comments are always considered as indentation markers.
1157 **** `python-continuation-offset': Indentation is automatically
1158 calculated in a pep8 compliant way depending on the context.
1160 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1161 Have no direct mapping as the shell interaction is completely different.
1163 **** `python-python-command', `python-jython-command':
1164 Replaced by `python-shell-interpreter'.
1166 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1167 `python-pdbtrack-minor-mode-string', `python-source-modes':
1170 *** Some commands have been replaced (old -> new):
1171 **** python-insert-class -> python-skeleton-class
1172 **** python-insert-def -> python-skeleton-def
1173 **** python-insert-for -> python-skeleton-for
1174 **** python-insert-if -> python-skeleton-if
1175 **** python-insert-try/except -> python-skeleton-try
1176 **** python-insert-try/finally -> python-skeleton-try
1177 **** python-insert-while -> python-skeleton-while
1178 **** python-find-function -> python-nav-jump-to-defun
1179 **** python-next-statement -> python-nav-forward-sentence
1180 **** python-previous-statement -> python-nav-backward-sentence
1181 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1182 **** python-end-of-defun-function -> python-nav-end-of-defun
1183 **** python-send-buffer -> python-shell-send-buffer
1184 **** python-send-defun -> python-shell-send-defun
1185 **** python-send-region -> python-shell-send-region
1186 **** python-send-region-and-go -> emulate with python-shell-send-region
1187 and python-shell-switch-to-shell
1188 **** python-send-string -> python-shell-send-string
1189 **** python-switch-to-python -> python-shell-switch-to-shell
1190 **** python-describe-symbol -> python-eldoc-at-point
1194 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1196 *** The D-Bus object manager interface is implemented.
1198 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1199 if their value does not fit into Emacs's integer range.
1201 *** The function `dbus-call-method' is now non-blocking.
1202 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1204 *** Signals can also be sent as unicast messages.
1206 *** The argument list of `dbus-register-signal' has been extended,
1207 according to the new match rule types of D-Bus.
1209 *** `dbus-init-bus' supports private connections.
1211 *** There is a new function `dbus-setenv'.
1213 ** `desktop-path' no longer includes the "." directory.
1214 Desktop files are now located in ~/.emacs.d by default.
1218 *** `dired-do-async-shell-command' executes each file sequentially
1219 if the command ends in `;' (when operating on multiple files).
1220 Otherwise, it executes the command on each file in parallel.
1222 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1223 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1226 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1227 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1228 mark/unmark/flag all files in the active region.
1230 *** The minibuffer default for `=' (`dired-diff') has changed.
1231 It is now the backup file for the file at point, if one exists.
1232 In Transient Mark mode the default is the file at the active mark.
1234 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1235 The global binding for `M-=', `count-words-region' is in effect.
1239 *** New module "notifications", which can send a notification when you
1240 receive a private message or your nickname is mentioned.
1242 *** ERC will look up server/channel names via auth-source and use any
1245 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1246 only applies to messages sent by lurkers.
1248 ** reStructuredText mode
1250 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1251 fontification, comment handling, and customization have all been revised
1254 *** Support for `imenu' and `which-function-mode'.
1256 *** The reStructuredText syntax is more closely covered.
1257 Sphinx support has been improved.
1259 *** `rst-insert-list' inserts new list or continues existing lists.
1261 *** A negative prefix argument always works for `rst-adjust'.
1263 *** The window configuration is reset after displaying a TOC.
1265 *** The constant `rst-version' describes the rst.el package version.
1269 *** Support for percent literals and recognition of regular expressions
1270 in method calls without parentheses with more methods, including Cucumber
1273 *** Improved syntax highlighting and indentation.
1275 *** New command `ruby-toggle-block', bound to `C-c {'.
1277 *** Some non-standard keybindings/commands have been removed:
1279 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1281 **** `ruby-mark-defun'; use `mark-defun'.
1283 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1284 appropriate settings for the variables `beginning-of-defun-function'
1285 and `end-of-defun-function'.
1287 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1288 `reindent-then-newline-and-indent' and `newline' have been removed.
1290 ** Shell Script mode
1292 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1294 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1296 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1300 *** The free software compiler GHDL is supported (and now the default).
1302 *** Support for the VHDL-AMS packages has been added/updated.
1304 *** Updated to the 2002 revision of the VHDL standard.
1306 *** Accepts \r and \f as whitespace.
1310 *** The faces used by Apropos are now directly customizable.
1311 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1312 see the `apropos' Custom group for details.
1314 *** The old options whose values specified faces to use have been removed
1315 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1319 *** This package has been rewritten to use Tabulated List mode.
1321 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1322 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1326 *** Algebraic simplification mode is now the default.
1327 To restrict to the limited simplifications given by the former
1328 default simplification mode, use `m I'.
1332 *** You can customize the header text that appears above each calendar month.
1333 See the variable `calendar-month-header'.
1335 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1337 *** The calendars produced by cal-html include holidays.
1338 Customize `cal-html-holidays' to change this.
1342 *** The major modes from the parser generators "Bovine" and "Wisent"
1343 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1344 are in `auto-mode-alist', and the corresponding manuals are included.
1348 **** Menu support for the "Configuration" feature. This allows users to
1349 choose the active configuration (such as debug or install) from the menu.
1351 **** New command `ede-set' to interactively set project-local variables.
1353 **** Support for compiling, debugging, and running in "generic" projects.
1355 **** Autoconf editing support for M4 macros with complex arguments.
1357 **** Compilation support for the "linux" project type.
1359 **** "simple" projects have been removed; use "generic" projects instead.
1363 **** Support for parsing #include statements inside a namespace in C/C++.
1365 **** Improved support for 'extern "C"' declarations in C/C++.
1367 **** The ability to ignore more common special C/C++ preprocessor symbols,
1368 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1369 If available, include cdefs.h as an additional source of preprocessor symbols.
1371 **** Improved C/C++ function pointer parsing.
1373 **** In Python, support for converting imports to include file names.
1375 **** Ability to dynamically determine the Python load path.
1377 **** Support for the Python 'WITH' and 'AT' keywords.
1379 **** Improved tooltip completion.
1383 **** The SRecode manual is now included.
1385 **** Tag generation supports constructor/destructor settings and system
1386 include differentiation.
1388 **** Addition of 'Framework' support: Frameworks are specified when a
1389 particular kind of library (such as Android) is needed in a common language
1392 **** Support for nested templates and let variables override based on priority.
1394 **** Support for merging tables from multiple related modes, such as
1395 default -> c++ -> arduino.
1397 ** Compile has a new option `compilation-always-kill'.
1401 *** `custom-reset-button-menu' now defaults to t.
1403 *** Non-option variables are never matched in `customize-apropos' and
1404 `customize-apropos-options' (i.e., the prefix argument does nothing for
1405 these commands now).
1409 *** The variables `term-default-fg-color' and `term-default-bg-color'
1410 are now deprecated in favor of the customizable face `term'.
1412 *** You can customize how to display ANSI terminal colors and styles
1413 by customizing the corresponding `term-color-<COLOR>',
1414 `term-color-underline' and `term-color-bold' faces.
1418 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1420 *** Remote processes are now also supported on remote MS-Windows hosts.
1424 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1425 Previously, this slot stored semicolon-separated attribute-value pairs
1426 appended to some imap URLs, but this is not compatible with RFC 3986.
1427 So now the `filename' slot stores the entire path and query components,
1428 and the `attributes' slot is always nil.
1430 *** New function `url-encode-url' for encoding a URI string.
1431 The `url-retrieve' function now uses this to encode its URL argument,
1432 in case that is not properly encoded.
1434 *** New command `url-cookie-list' displays all the current cookies, and
1435 allows deleting selected cookies.
1437 ** notifications.el supports now version 1.2 of the Notifications API.
1438 The function `notifications-get-capabilities' returns the supported
1441 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1442 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1443 `flymake-warning-bitmap'.
1445 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1446 specifying URL types that should be converted to remote file names at
1447 the FFAP prompt. The default is now '("ftp").
1449 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1450 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1452 ** New option `mouse-avoidance-banish-position' specifies where the
1453 `banish' mouse avoidance setting moves the mouse.
1455 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1456 closing brackets to be aligned with the line of the opening bracket.
1458 ** In Proced mode, new command `proced-renice' renices marked processes.
1460 ** New option `async-shell-command-buffer' specifies the buffer to use
1461 for a new asynchronous `shell-command' when the default output buffer
1462 `*Async Shell Command*' is already in use.
1464 ** SQL mode has a new option `sql-db2-escape-newlines'.
1465 If non-nil, newlines sent to the command interpreter will be escaped
1466 by a backslash. The default does not escape the newlines and assumes
1467 that the sql statement will be terminated by a semicolon.
1469 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1470 (and modes that derive from it), sorts the column at point, or the Nth
1471 column if a numeric prefix argument is given.
1473 ** `which-func-modes' now defaults to t, so Which Function mode, when
1474 enabled, applies to all applicable major modes.
1476 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1479 ** Follow mode no longer works by using advice.
1480 The option `follow-intercept-processes' has been removed.
1482 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1484 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1485 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1486 *** semantic-change-hooks -> semantic-change-functions
1487 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1488 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1489 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1490 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1491 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1492 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1493 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1494 *** rcirc-activity-hooks -> rcirc-activity-functions
1495 *** rcirc-print-hooks -> rcirc-print-functions
1496 *** dbus-event-error-hooks -> dbus-event-error-functions
1497 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1498 *** checkdoc-style-hooks -> checkdoc-style-functions
1499 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1500 *** archive-extract-hooks -> archive-extract-hook
1501 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1502 *** hfy-post-html-hooks -> hfy-post-html-hook
1503 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1504 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1505 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1506 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1508 ** Obsolete packages
1511 In most cases, assoc+member+push+delq work just as well.
1512 And in any case it's just a terrible package: ugly semantics, terrible
1513 inefficiency, and not namespace-clean.
1522 * Incompatible Lisp Changes in Emacs 24.3
1524 ** Docstrings starting with `*' no longer indicate user options.
1525 Only variables defined using `defcustom' are considered user options.
1526 The function `user-variable-p' is now an obsolete alias for
1527 `custom-variable-p'.
1529 ** The return values of `defalias', `defun' and `defmacro' have changed,
1530 and are now undefined. For backwards compatibility, `defun' and
1531 `defmacro' currently return the name of the newly defined
1532 function/macro, but this should not be relied upon.
1534 ** `random' by default now returns a different random sequence in
1535 every Emacs run. Use `(random S)', where S is a string, to set the
1536 random seed to a value based on S, in order to get a repeatable
1537 sequence in later calls.
1539 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1540 that substring is inserted literally even if the LITERAL arg is
1541 non-nil, instead of causing an error to be signaled.
1543 ** `select-window' now always makes the window's buffer current.
1544 It does so even if the window was selected before.
1546 ** The function `x-select-font' can return a font spec, instead of a
1547 font name as a string. Whether it returns a font spec or a font name
1548 depends on the graphical library.
1550 ** `face-spec-set' no longer sets frame-specific attributes when the
1551 third argument is a frame (that usage was obsolete since Emacs 22.2).
1553 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1555 ** The CL package's `get-setf-method' function no longer exists.
1556 Generalized variables are now part of core Emacs Lisp, and implemented
1557 differently to the way cl.el used to do it. It is not possible to
1558 define a compatible replacement for `get-setf-method'. See the file
1559 gv.el for internal details of the new implementation.
1561 ** The arguments of `dbus-register-signal' are no longer just strings,
1562 but keywords or keyword-string pairs. The old argument list will
1563 still be supported for Emacs 24.x.
1565 ** Miscellaneous name changes
1566 Some Lisp symbols have been renamed to correct their spelling,
1567 or to be more consistent with standard Emacs terminology.
1569 *** Renamed functions
1570 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1571 **** inactivate-input-method -> deactivate-input-method
1572 **** quail-inactivate -> quail-deactivate
1573 **** robin-inactivate -> robin-deactivate
1574 **** viper-inactivate-input-method -> viper-deactivate-input-method
1575 **** viper-inactivate-input-method-action ->
1576 viper-deactivate-input-method-action
1577 **** ucs-input-inactivate -> ucs-input-deactivate
1580 The old hooks are still supported for backward compatibility, but they
1581 are deprecated and will be removed eventually.
1582 **** input-method-inactivate-hook -> input-method-deactivate-hook
1583 **** robin-inactivate-hook -> robin-deactivate-hook
1584 **** quail-inactivate-hook -> quail-deactivate-hook
1586 *** Renamed variables
1587 **** follow-deactive-menu -> follow-inactive-menu
1588 **** inactivate-current-input-method-function ->
1589 deactivate-current-input-method-function
1591 ** Some obsolete functions, variables, and faces have been removed:
1592 *** `last-input-char', `last-command-char', `unread-command-char'
1593 *** `facemenu-unlisted-faces'
1594 *** `rmail-decode-mime-charset'
1595 *** `iswitchb-read-buffer'
1596 *** `sc-version', `sc-submit-bug-report'
1597 *** `set-char-table-default'
1598 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1599 *** `compile-internal'
1601 *** `mode-line-inverse-video'
1602 *** `follow-mode-off-hook'
1603 *** `cvs-commit-buffer-require-final-newline'
1604 (use `log-edit-require-final-newline' instead)
1605 *** `cvs-changelog-full-paragraphs'
1606 (use `log-edit-changelog-full-paragraphs' instead)
1607 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1608 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1609 *** `vc-master-templates' (use `vc-handled-backends' instead)
1610 *** `vc-checkout-carefully'
1613 * Lisp Changes in Emacs 24.3
1615 ** CL-style generalized variables are now in core Elisp.
1616 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1617 You can define your own generalized variables using `gv-define-simple-setter',
1618 `gv-define-setter', etc.
1620 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1621 This can significantly speed up execution of non-byte-compiled code,
1622 but can also bump into previously unnoticed cyclic dependencies.
1623 These are generally harmless: they will simply cause the macro calls
1624 to be left for later expansion (as before), but will result in a
1625 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1626 You may wish to restructure your code so this does not happen.
1628 ** New sampling-based Elisp profiler.
1629 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1630 When finished, use M-x profiler-stop. The sampling rate can be based on
1631 CPU time or memory allocations.
1633 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1634 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1636 ** New macros `setq-local' and `defvar-local'.
1638 ** Face underlining can now use a wave.
1640 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1641 of `read-regexp' accepts a string ending with a colon and space, and its
1642 second argument DEFAULTS can be a list of strings accessible via `M-n'
1643 in the minibuffer ahead of other hard-coded useful regexp-related values.
1644 More commands use `read-regexp' now to read their regexp arguments.
1648 *** New function `completion-table-with-quoting' to handle completion
1649 in the presence of quoting, such as file completion in shell buffers.
1651 *** New function `completion-table-subvert' to use an existing completion
1652 table, but with a different prefix.
1656 *** New error type and new function `user-error'.
1657 These do not trigger the debugger.
1659 *** New option `debugger-bury-or-kill', saying what to do with the
1660 debugger buffer when exiting debug.
1662 *** Set `debug-on-message' to enter the debugger when a certain
1663 message is displayed in the echo area. This can be useful when trying
1664 to work out which code is doing something.
1666 *** New var `inhibit-debugger', automatically set to prevent accidental
1667 recursive invocations.
1671 *** New command `fit-frame-to-buffer' adjusts the frame height to
1674 *** The command `fit-window-to-buffer' can adjust the frame height
1675 if the new option `fit-frame-to-buffer' is non-nil.
1677 *** New macro `with-temp-buffer-window', similar to
1678 `with-output-to-temp-buffer'.
1680 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1683 *** New option `switch-to-buffer-preserve-window-point' to restore a
1684 window's point when switching buffers.
1686 *** New display action alist entries `window-height' and `window-width'
1687 specify the size of new windows created by `display-buffer'.
1689 *** New display action alist entry `pop-up-frame-parameters', if
1690 non-nil, specifies frame parameters to give any newly-created frame.
1692 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1693 tells display action functions to avoid changing which frame is
1696 *** New display action alist entry `previous-window', if non-nil,
1697 specifies window to reuse in `display-buffer-in-previous-window'.
1699 *** New display action functions `display-buffer-below-selected',
1700 and `display-buffer-in-previous-window'.
1702 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1703 now accept a third argument to avoid choosing the selected window.
1705 *** Additional values recognized for option `window-combination-limit'.
1707 *** The following variables are obsolete, as they can be replaced by
1708 appropriate entries in the `display-buffer-alist' function introduced
1710 **** `dired-shrink-to-fit'
1711 **** `display-buffer-reuse-frames'
1712 **** `display-buffer-function'
1713 **** `special-display-buffer-names'
1714 **** `special-display-frame-alist'
1715 **** `special-display-function'
1716 **** `special-display-regexps'
1720 *** `current-time-string' no longer requires that its argument's year
1721 must be in the range 1000..9999. It now works with any year supported
1722 by the underlying C implementation.
1724 *** `current-time' now returns extended-format time stamps
1725 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1726 PSEC is typically a multiple of 1000 on current machines. Other
1727 functions that use this format, such as `file-attributes' and
1728 `format-time-string', have been changed accordingly. Old-format time
1729 stamps are still accepted.
1731 *** The format of timers in `timer-list' and `timer-idle-list' is now
1732 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1733 The PSECS slot is new, and uses picosecond resolution. It can be
1734 accessed via the new `timer--psecs' accessor.
1736 *** Last-modified time stamps in undo lists now are of the form
1737 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1741 *** Improved security when handling persistent objects:
1743 **** `eieio-persistent-read' now features optional arguments for specifying
1744 the class to load, as well as a flag stating whether subclasses are allowed;
1745 if provided, other classes will be rejected by the reader. For
1746 compatibility with existing code, if the class is omitted only a
1749 **** New specialized reader for pulling in classes and signaling errors
1750 without evaluation of suspicious code.
1752 **** All slots that contain objects must have a :type. Slots with lists
1753 of objects must use a new type predicate for a list of an object type.
1755 *** Support for `find-function' and similar utilities, through the addition
1756 of filename support to generated symbols.
1758 ** Floating point functions now always return special values like NaN,
1759 instead of signaling errors, if given invalid args; e.g., (log -1.0).
1760 Previously, they returned NaNs on some platforms but signaled errors
1761 on others. The affected functions are acos, asin, tan, exp, expt,
1762 log, log10, sqrt, and mod.
1764 ** New fringe bitmap `exclamation-mark'.
1766 ** Miscellaneous changes to special forms and macros
1768 *** `defun' and `defmacro' are now macros rather than special forms.
1770 *** `kbd' is now a function rather than a macro.
1772 ** Miscellaneous new functions
1774 *** `set-temporary-overlay-map' sets up a temporary keymap that
1775 takes precedence over most other maps for a short while (normally one key).
1777 *** `autoloadp' tests if its argument is an autoloaded object.
1779 *** `autoload-do-load' performs the autoloading operation.
1781 *** `buffer-narrowed-p' tests if the buffer is narrowed.
1783 *** `file-name-base' returns a file name sans directory and extension.
1785 *** `function-get' fetches a function property, following aliases.
1787 *** `posnp' tests if an object is a `posn'.
1789 *** `system-users' returns the user names on the system.
1791 *** `system-groups' returns the group names on the system.
1793 *** `tty-top-frame' returns the topmost frame of a text terminal.
1795 ** The following functions and variables are obsolete:
1796 *** `automount-dir-prefix' (use `directory-abbrev-alist')
1797 *** `buffer-has-markers-at'
1798 *** `macro-declaration-function' (use `macro-declarations-alist')
1799 *** `window-system-version' (provides no useful information)
1800 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
1801 *** `query-replace-interactive'
1802 *** `font-list-limit' (has had no effect since Emacs < 23)
1805 * Changes in Emacs 24.3 on Non-Free Operating Systems
1807 ** Cygwin builds can use the native MS Windows user interface.
1808 Pass `--with-w32' to configure. The default remains the X11 interface.
1810 ** Two new functions are available in Cygwin builds:
1811 `cygwin-convert-file-name-from-windows' and
1812 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
1813 code to access the Cygwin file-name mapping machinery to convert
1814 between Cygwin and Windows-native file and directory names.
1816 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
1817 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
1818 `mouse-autoselect-window'.
1820 ** On MS Windows Vista and later Emacs now supports symbolic links.
1822 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
1823 support for libxml2, even if its presence is detected.
1825 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1827 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
1828 directories to the search path. You must add them yourself if you want them.
1831 * Changes in Emacs 24.2
1833 ** This is mainly a bug-fix release.
1836 * Installation Changes in Emacs 24.1
1838 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1839 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1840 also depend on Gtk+. You can disable them with --without-rsvg and
1843 ** Emacs can be compiled with GnuTLS support.
1844 This happens by default if a suitably recent version of the library is
1845 found at build time. To prevent this, use the configure option
1846 `--without-gnutls'. See below for GnuTLS features.
1848 ** Emacs can be compiled with SELinux support.
1849 This happens by default if a suitably recent version of the library is
1850 found at build time. To prevent this, use the configure option
1851 `--without-selinux'. See below for SELinux features.
1853 ** Emacs can be compiled with ImageMagick support.
1854 This happens by default if a suitably recent version of the library is
1855 found at build time. To prevent this, use the configure option
1856 `--without-imagemagick'. See below for ImageMagick features.
1857 This feature is not available for the Nextstep or MS ports.
1859 ** Emacs can be compiled with libxml2 support.
1860 This happens by default if a suitably recent version of the library is
1861 found at build time. To prevent this, use the configure option
1862 `--without-xml2'. See below for libxml2 features.
1864 ** By default, the installed Info and man pages are compressed.
1865 You can disable this by configuring --without-compress-info.
1867 ** New configure option --with-wide-int.
1868 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
1869 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1872 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
1873 These provide no new functionality, they just remove the need to edit
1874 lib-src/Makefile by hand in order to use the associated features.
1876 ** New configure option --enable-use-lisp-union-type.
1877 This is only useful for Emacs developers to debug certain types of bugs.
1878 This is not a new feature; only the configure flag is new.
1880 ** The standalone programs digest-doc and sorted-doc are removed.
1881 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1883 ** The standalone program `fakemail' is removed.
1884 If you need it, feedmail.el provides a superset of the functionality.
1887 * Startup Changes in Emacs 24.1
1889 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1890 command line arguments, and the EMACS_UNIBYTE environment variable, no
1891 longer have any effect. (They were declared obsolete in Emacs 23.)
1893 ** New command line option `--no-site-lisp' removes site-lisp directories
1894 from load-path. -Q now implies this. This option does not affect the
1895 EMACSLOADPATH environment variable (and hence has no effect for
1899 * Changes in Emacs 24.1
1903 *** Many packages now use the `completion-at-point' command,
1904 rather than implementing separate completion commands.
1906 *** `completion-at-point' now handles tags and semantic completion.
1908 *** Completion in a non-minibuffer now tries to detect the end of completion
1909 and pops down the *Completions* buffer accordingly.
1911 *** New option `completion-cycle-threshold' allows completion cycling.
1913 *** New option `completion-category-overrides' for overriding the
1914 default completion style in certain circumstances.
1916 *** New completion style `substring'.
1918 *** Completion of buffer names uses `substring' completion by default.
1920 *** The option `widget-complete-field' has been removed.
1924 *** The first time you try sending mail, Emacs asks for a mail method.
1925 This is implemented by a new default for `send-mail-function', which
1926 is `sendmail-query-once'. This offers to use the smtpmail package, or
1927 to use the old defaults relying on external mail facilities
1928 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
1929 `mailclient-send-it' on Windows).
1931 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
1932 transfers the report to your desktop's preferred mail client, if there
1933 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
1936 *** See Changes in Specialized Modes and Packages for SMTPmail changes
1937 and Mail mode changes
1939 ** Emacs server and client changes
1941 *** New option `server-port' specifies the port for TCP Emacs servers.
1943 *** New emacsclient argument -q/--quiet suppresses some status messages.
1945 *** New emacsclient argument --frame-parameters specifies the frame
1946 parameters of any newly-created graphical frame.
1948 *** If emacsclient shuts down due to Emacs signaling an error,
1949 its exit status is 1.
1951 *** New emacsclient argument --parent-id ID.
1952 This opens a client frame in parent X window ID, via XEmbed, similar
1953 to the --parent-id argument to Emacs.
1955 ** Internationalization changes
1957 *** Emacs now supports display and editing of bidirectional text.
1958 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1959 displayed in the correct visual order as expected by users of those
1960 scripts. The display reordering is a "full bidirectionality" class
1961 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1962 with no RTL text should look exactly the same as before.
1964 **** New buffer-local variable `bidi-display-reordering'.
1965 To disable display reordering in a buffer, change this to nil.
1967 **** New buffer-local variable `bidi-paragraph-direction'.
1968 If nil (the default), Emacs determines the base direction of each
1969 paragraph from its text, as specified by the UBA. Setting the value
1970 to `right-to-left' or `left-to-right' forces a base direction on each
1973 Paragraphs with right-to-left base direction are displayed starting at
1974 the right window edge.
1976 *** Enhanced support for characters with no glyphs in available fonts,
1977 or, on text terminals, characters that cannot be encoded by the
1978 terminal coding system. The new option `glyphless-char-display-control'
1979 specifies how to display them: as a hexadecimal code in a box, a thin
1980 1-pixel space, an empty box, etc.
1982 *** New input methods for Farsi and Bulgarian
1983 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
1985 *** `nobreak-char-display' now also highlights Unicode hyphen chars
1986 (U+2010 and U+2011).
1988 *** New Hebrew translation of the Emacs Tutorial.
1989 Type `C-u C-h t' to choose it in case your language setup doesn't
1990 automatically select it.
1992 ** An Emacs Lisp package manager is now included.
1993 This is a convenient way to download and install additional packages,
1994 from a package repository at http://elpa.gnu.org.
1996 *** M-x list-packages shows a list of packages, which can be
1997 selected for installation.
1999 *** New command `describe-package', bound to `C-h P'.
2001 *** By default, all installed packages are loaded automatically when
2002 Emacs starts up. To disable this, set `package-enable-at-startup' to
2003 nil. To specify the packages to load, customize `package-load-list'.
2005 ** Custom theme changes
2007 *** New command `M-x customize-themes', which provides a convenient
2008 interface for enabling and disabling Custom themes.
2010 *** New option `custom-theme-load-path' is the load path for themes.
2011 Emacs no longer looks for Custom themes in `load-path'. The default
2012 value of `custom-theme-load-path' says to look for themes in
2013 `custom-theme-directory', followed by a subdirectory of
2014 `data-directory' named "themes/", which contains a small selection of
2015 built-in Custom themes.
2017 *** New option `custom-safe-themes' records known-safe theme files.
2018 If a theme is not in this list, Emacs queries before loading it, and
2019 offers to save the theme to `custom-safe-themes' automatically. By
2020 default, all themes included in Emacs are treated as safe.
2022 ** Improved GTK integration
2024 *** GTK scroll-bars are now placed on the right by default.
2025 The function `set-scroll-bar-mode' can change this.
2027 *** GTK tool bars can have just text, just images or images and text.
2028 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2029 the default is taken from desktop settings.
2031 *** GTK tool bars can be placed on any edge of the frame.
2032 The frame-parameter tool-bar-position controls this. It takes the
2033 values top, left, right or bottom. The Options => Show/Hide menu has
2036 *** The default colors for selected text (the `region' face) are taken
2037 from the GTK theme when Emacs is built with GTK.
2039 *** Emacs uses GTK tooltips by default if built with GTK.
2040 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2042 ** Graphical interface changes
2044 *** On graphical displays, the mode-line no longer ends in dashes.
2045 Also, the first dash (which does not indicate anything) is just
2046 displayed as a space.
2048 *** `menu-bar-select-buffer-function' lets you choose another operation
2049 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2051 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2052 built with Xft. These fonts can be set via X resources, for example:
2053 Emacs.pane.menubar.font: Courier-12
2057 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2058 or if it receives a SIGINT signal in batch mode.
2060 *** `kill-emacs-hook' is now also run in batch mode.
2061 Third-party code which adds to `kill-emacs-hook' should check if they
2062 do the right thing in batch mode.
2064 ** Scrolling changes
2066 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2067 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2068 of buffer at first key-press (instead they move to top/bottom of buffer)
2069 when `scroll-error-top-bottom' is non-nil.
2071 *** New option `scroll-error-top-bottom' (see above).
2073 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2074 scroll a line instead of full screen.
2076 *** New property `scroll-command' should be set on a command's symbol to
2077 define it as a scroll command affected by `scroll-preserve-screen-position'.
2079 *** If you customize `scroll-conservatively' to a value greater than 100,
2080 Emacs will never recenter point in the window when it scrolls due to
2081 cursor motion commands or commands that move point (e.f., `M-g M-g').
2082 Previously, you needed to use `most-positive-fixnum' as the value of
2083 `scroll-conservatively' to achieve the same effect.
2085 *** "Aggressive" scrolling now honors the scroll margins.
2086 If you customize `scroll-up-aggressively' or
2087 `scroll-down-aggressively' and move point off the window, Emacs now
2088 scrolls the window so as to avoid positioning point inside the scroll
2091 ** Basic SELinux support has been added.
2092 This requires Emacs to be linked with libselinux at build time.
2094 *** Emacs preserves the SELinux file context when backing up.
2095 Also, the function `copy-file' has an extra optional argument for
2096 preserving SELinux context, and the return value of `backup-buffer'
2097 now includes the SELinux context.
2099 *** New functions `file-selinux-context' and `set-file-selinux-context'
2100 get and set the SELinux context of a file.
2104 *** `delete-by-moving-to-trash' now only affects commands that specify
2105 trashing. This avoids inadvertently trashing temporary files.
2107 *** Calling `delete-file' or `delete-directory' with a prefix argument
2108 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2110 ** File- and directory-local variable changes
2112 *** You can stop directory local vars from applying to subdirectories.
2113 Add an element (subdirs . nil) to the alist portion of any variables
2114 settings to indicate that the section should not apply to
2117 *** Directory local variables can apply to some file-less buffers.
2118 Affected modes include dired, vc-dir, and log-edit. For example,
2119 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2120 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2121 `hack-dir-local-variables-non-file-buffer' to support this.
2123 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2124 Instead, use "eval: (minor-mode 1)".
2126 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2127 to `inhibit-local-variables-regexps'. As the name suggests, it now
2128 applies to ALL file local variables, not just -*- lines. The
2129 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2134 *** The `quit-window' command now restores the last buffer displayed
2135 in the quitted window.
2137 *** Resizing an Emacs frame now preserves proportional window sizes,
2138 modulo restrictions like window minimum sizes and fixed-size windows.
2140 *** The behavior of `display-buffer' is now customizable in detail.
2142 **** New option `display-buffer-base-action' specifies a list of
2143 user-determined display "actions" (functions and optional arguments
2144 for choosing the displaying window).
2146 This takes precedence over the default display action, which is
2147 specified by `display-buffer-fallback-action'.
2149 **** New option `display-buffer-alist' maps buffer name regexps to
2150 display actions, taking precedence over `display-buffer-base-action'.
2152 *** New option `window-combination-limit'.
2153 The new option `window-combination-limit' allows to return the space
2154 obtained for resizing or creating a window more reliably to the window
2155 from which such space was obtained.
2157 *** New option `window-combination-resize'.
2158 The new option `window-combination-resize' allows to split a window that
2159 otherwise cannot be split because it's too small by stealing space from
2160 other windows in the same combination. Subsequent resizing or deletion
2161 of the window will resize all windows in the same combination as well.
2163 *** New option `frame-auto-hide-function' lets you choose between
2164 iconifying or deleting a frame when burying a buffer in a dedicated
2165 frame, or quitting a window showing a buffer in a frame of its own.
2167 *** New commands `maximize-window' and `minimize-window'.
2168 These maximize and minimize the size of a window within its frame.
2170 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2171 These functions allow to navigate through the live buffers that have
2172 been shown in a specific window.
2174 ** Minibuffer changes
2176 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2177 This is handy for minibuffer-only frames, and is also used for the feature
2178 where mouse-1 pops up *Messages*"', which can now easily be changed.
2180 *** Minibuffers set `truncate-lines' to nil.
2181 If you want to change the value to something else, you could use
2182 for example `minibuffer-setup-hook'.
2184 ** `auto-mode-case-fold' is now enabled by default.
2186 ** `backup-by-copying-when-mismatch' now defaults to t.
2188 ** New basic faces `error', `warning', `success'.
2189 These are used to highlight text indicating failure, caution or
2190 successful operation.
2192 ** New option `list-colors-sort' defines the color sort order
2193 for `list-colors-display'.
2195 ** The variable `focus-follows-mouse' now always defaults to nil.
2198 * Editing Changes in Emacs 24.1
2202 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2203 `isearch-yank-line'.
2205 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2206 `isearch-yank-kill'.
2208 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2210 ** New commands `count-words-region' and `count-words'.
2212 *** M-= is bound to `count-words-region', not `count-lines-region'.
2213 The `count-words-region' command, when called interactively, reports
2214 the number of lines, words, and characters in the region. It is a
2215 superset of the old `count-lines-region', which is now an obsolete
2218 ** The command `just-one-space' (M-SPC), if given a negative argument,
2219 also deletes newlines around point.
2223 *** New option `delete-active-region'.
2224 If non-nil, [delete] and DEL delete the region if it is active and no
2225 prefix argument is given. If set to `kill', those commands kill
2228 *** New command `delete-forward-char', bound to [delete].
2229 This is meant for interactive use, and obeys `delete-active-region'.
2230 The command `delete-char' does not obey `delete-active-region'.
2232 *** `delete-backward-char' is now a Lisp function.
2233 Apart from obeying `delete-active-region', its behavior is unchanged.
2234 However, the byte compiler now warns if it is called from Lisp; Lisp
2235 callers should use delete-char with a negative argument instead.
2237 *** The option `mouse-region-delete-keys' has been deleted.
2239 ** Selection changes.
2241 The default handling of clipboard and primary selections has been
2242 changed to conform with modern X applications. In short, most
2243 commands for killing and yanking text now use the clipboard, while
2244 mouse commands use the primary selection.
2246 In the following, we provide a list of these changes, followed by a
2247 list of steps to get the old behavior back if you prefer that.
2249 *** `select-active-regions' now defaults to t.
2250 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2251 the kill ring. The selected text is put in the primary selection, if
2252 the system possesses a separate primary selection facility (e.g. X).
2254 **** `select-active-regions' also accepts a new value, `only'.
2255 This means to only set the primary selection for temporarily active
2256 regions (usually made by mouse-dragging or shift-selection);
2257 "ordinary" active regions, such as those made with C-SPC followed by
2258 point motion, do not alter the primary selection.
2260 **** `mouse-drag-copy-region' now defaults to nil.
2262 *** mouse-2 is now bound to `mouse-yank-primary'.
2263 This pastes from the primary selection, ignoring the kill-ring.
2264 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2266 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2268 *** `x-select-enable-primary' now defaults to nil.
2269 Thus, commands that kill text or copy it to the kill-ring (such as
2270 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2272 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2273 exactly equivalent to M-w, C-w, and C-y respectively.
2275 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2276 non-nil by default, as Windows does not support the primary selection
2277 between applications.
2279 *** To return to the previous behavior, do the following:
2281 **** Change `select-active-regions' to nil.
2282 **** Change `mouse-drag-copy-region' to t.
2283 **** Change `x-select-enable-primary' to t (on X only).
2284 **** Change `x-select-enable-clipboard' to nil.
2285 **** Bind `mouse-yank-at-click' to mouse-2.
2287 *** Support for X cut buffers has been removed.
2289 *** X clipboard managers are now supported.
2290 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2292 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2293 in the current rectangle. With a prefix argument, this prompts for a
2294 number to count from and for a format string.
2296 ** `redisplay-dont-pause' now defaults to t.
2297 This makes Emacs feel more responsive to editing commands that arrive
2298 at high rate, e.g. if you lean on some key, because stopping redisplay
2299 in the middle (when this variable is nil) forces more expensive
2300 updates later on, and Emacs appears to be unable to keep up.
2302 ** The behavior of <TAB> for active regions in Text mode has changed.
2303 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2304 when the region is active causes Emacs to indent all the lines in the
2305 region, aligning them with the line previous to the first line in the
2306 region (or with the left margin if there is no previous line).
2308 ** When `occur' is called with a prefix argument, matching strings are
2309 collected into the `*Occur*' buffer without line numbers. If there
2310 are parenthesized subexpressions in the specified regexp, `occur'
2311 reads replacement text that may contain \\& and \\N whose convention
2312 follows `replace-match'.
2315 * Changes in Specialized Modes and Packages in Emacs 24.1
2317 ** Archive Mode has basic support for browsing and updating 7z archives.
2321 *** BibTeX mode now supports biblatex.
2322 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2323 `bibtex-entry-field-alist' is now an obsolete alias for
2324 `bibtex-BibTeX-entry-alist'.
2326 *** New command `bibtex-search-entries', bound to C-c C-a.
2328 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2330 *** New variable `bibtex-search-entry-globally'.
2334 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2336 *** The default browser used by the package is now the "xdg-open" program,
2337 on platforms that support it. This calls your desktop's preferred browser.
2341 *** Support for musical notes.
2343 *** Support for logarithmic units.
2345 *** No longer uses the tex prefix for TeX specific unit names when
2346 using TeX or LaTeX mode.
2348 *** New option to highlight selections using faces.
2350 *** `calc-histogram' has the option of using a vector to determine the bins.
2352 *** New "O" option prefix.
2354 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2356 ** Calendar, Diary, and Appt
2358 *** Diary entries can contain non-printing "comments".
2359 See the variable `diary-comment-start'.
2361 *** Appointments can specify their individual warning times.
2362 See the variable `appt-warning-time-regexp'.
2364 *** The function specified by `appt-disp-window-function' may be passed
2365 lists of arguments if multiple appointments are due at similar times.
2366 If you are using a custom function for this, you should update it.
2368 *** New function `diary-hebrew-birthday'.
2370 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2371 may no longer be nil, but must all be strings.
2373 *** The obsolete (since Emacs 22.1) method of enabling the appt
2374 package by adding `appt-make-list' to `diary-hook' has been removed.
2375 Use `appt-activate' instead.
2377 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2378 appt-issue-message (use the function appt-activate)
2379 appt-visible/appt-msg-window (use the variable appt-display-format)
2381 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2382 view-diary-entries, list-diary-entries, show-all-diary-entries
2386 *** New feature to "guess" the style in an existing buffer.
2387 The main entry point is M-x c-guess.
2389 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2391 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2392 Thus C-M-a will, by default, go to the beginning of the immediate function,
2395 *** "Macros with semicolons" can be registered for correct indentation.
2396 Where such a macro ends a line (no semicolon) the next statement is no longer
2397 parsed as a statement continuation.
2399 ** Comint and modes derived from it use the standard completion code.
2403 *** Compilation mode can be used without Font Lock mode.
2404 `compilation-parse-errors-function' is now obsolete.
2406 *** New variable `compilation-filter-start', which is bound while
2407 `compilation-filter-hook' runs. It records the start position of the
2408 text inserted by `compilation-filter'.
2410 *** `compilation-error-screen-columns' and `compilation-first-column'
2411 are obeyed in the editing buffer. So programming language modes can
2412 set them, whereas previously only the value in the *Compilation*
2417 *** Customize buffers now contain a search field.
2418 The search is performed using `customize-apropos'.
2419 To turn off the search field, set `custom-search-field' to nil.
2421 *** Options in customize group buffers start out hidden if not customized.
2422 Use the arrow to the left of the option name to toggle visibility.
2424 *** custom-buffer-sort-alphabetically now defaults to t.
2426 *** The color widget now has a "Choose" button, which allows you to
2427 choose a color via `list-colors-display'.
2431 *** It is now possible to access buses other than the default system
2434 *** The `dbus-register-method' and `dbus-register-property' functions
2435 optionally do not register names.
2437 *** The new function `dbus-register-service' registers a known service
2438 name on a D-Bus without also registering a property or a method.
2442 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2443 if called with a prefix argument, read a file name from the minibuffer
2444 instead of using the current buffer.
2446 *** The "dired local variables" feature of Dired-x is obsolete.
2447 The standard directory local variables feature replaces it.
2451 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2452 controlling attempts to autojoin a channel.
2454 *** New variable `erc-coding-system-precedence': If we use `undecided'
2455 as the server coding system, this variable will then be consulted.
2456 The default is to decode strings that can be decoded as utf-8 as
2457 utf-8, and do the normal `undecided' decoding for the rest.
2461 *** The default value of `eshell-directory-name' has changed
2462 to be an "eshell" directory in `user-emacs-directory'.
2463 The old "~/.eshell/" directory is still used if it exists, though.
2467 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2468 It now supports multithread non-stop debugging and simultaneous
2469 debugging of several threads.
2473 *** RET (`image-toggle-animation') toggles animation, if applicable.
2474 Animation plays once, unless the option `image-animate-loop' is non-nil.
2478 *** New command M-x info-display-manual displays a named Info manual.
2479 If that manual is already visited in some Info buffer, it displays
2480 that buffer. (This is handy if you have many manuals in many *info*
2481 buffers, and don't remember the name of the buffer visiting the manual
2482 you want to consult.) Otherwise, it loads and displays the manual.
2484 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2485 This is for compatibility with the stand-alone Info reader program,
2486 and also because `Info-edit' is a rarely used command that is disabled
2489 ** Mail mode changes (not Message mode)
2491 *** New command M-x mail-add-attachment for adding MIME attachments
2493 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2494 (Its name is misleading, since it has nothing to do with MIME
2495 attachments.) The old name is now an obsolete alias to the new name.
2497 ** MH-E has been updated to MH-E version 8.3.1.
2498 See MH-E-NEWS for details.
2500 ** Modula-2 mode provides auto-indentation.
2502 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2504 ** nXML mode no longer binds C-RET to `nxml-complete'.
2505 Completion is now performed via `completion-at-point', bound to C-M-i
2506 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2507 default), this performs tag completion.
2509 ** Org mode has been updated to version 7.8.09.
2510 See ORG-NEWS for details.
2512 ** Prolog mode has been completely revamped, with lots of additional
2513 functionality such as more intelligent indentation, electricity,
2514 support for more variants, including Mercury, and a lot more.
2518 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2519 in the Rmail incoming message.
2521 *** The variable `rmail-message-filter' no longer has any effect.
2522 This change was made in Emacs 23.1 but was not advertised at the time.
2523 Try using `rmail-show-message-hook' instead.
2527 *** M-x shell prompts for the shell path name if the default directory
2528 is a remote file name and neither the environment variable $ESHELL nor
2529 the variable `explicit-shell-file-name' is set.
2531 *** TAB is now bound to the standard `completion-at-point' command,
2532 which now implements the pcomplete rules for shell command completion.
2536 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2537 if the mail server supports them. This uses either built-in GnuTLS
2538 support, or the starttls.el library. Customize `smtpmail-stream-type'
2541 *** The variable `smtpmail-auth-credentials' has been removed.
2542 By default, the information is now stored in the file ~/.authinfo.
2543 This was the default value of smtpmail-auth-credentials. If you had
2544 customized smtpmail-auth-credentials to a list of user names and
2545 passwords, those settings are not used. During your first connection
2546 to the smtp server, Emacs will prompt for the user name and password,
2547 and offer to save them to ~/.authinfo. Or you can manually copy the
2548 credentials to ~/.authinfo. For example, if you had
2550 (setq smtpmail-auth-credentials
2551 '(("mail.example.org" 25 "jim" "s!cret")))
2553 then the equivalent line in ~/.authinfo would be
2555 machine mail.example.org port 25 login jim password s!cret
2557 See the auth-source manual for more information, e.g. on encrypting
2558 the credentials file.
2560 *** The variable `smtpmail-starttls-credentials' has been removed.
2561 If you had that set, you need to put
2563 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2565 in your ~/.authinfo file instead.
2567 *** SMTPmail defaults to using the address in the From: header as the
2568 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2569 to the address you wish to use instead.
2573 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2574 and `sql-oracle-scan-on'.
2576 *** New options controlling prompting for login parameters.
2577 Each supported product has a custom variable `sql-*-login-params',
2578 which is a list of the parameters to be prompted for before a
2579 connection is established.
2581 *** The command `sql-product-interactive' now takes a prefix argument,
2582 which causes it to prompt for an SQL product.
2584 *** Product-specific SQL interactive commands now take prefix arguments.
2585 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2586 given a prefix argument, prompt for a name for the SQL interactive
2587 buffer. This reduces the need for calling `sql-rename-buffer'.
2589 *** SQL interactive modes suppress command continuation prompts, and
2590 replace tabs with spaces. The first change impacts multiple line SQL
2591 statements entered with C-j between each line, statements yanked into
2592 the buffer and statements sent with `sql-send-*' functions. The
2593 second prevents the MySQL and Postgres interpreters from listing
2594 object name completions when sent text via `sql-send-*' functions.
2596 *** New command `sql-connect' starts a predefined SQLi session,
2597 using the login parameters from `sql-connection-alist'.
2599 *** New "Save Connection" menu item in SQLi buffers.
2600 This gathers the login params specified for the SQLi session, if it
2601 was not started by a connection, and saves them as a new connection.
2603 *** New commands for listing database objects and details:
2604 sql-list-all and sql-list-table.
2606 *** An API for manipulating SQL product definitions has been added.
2610 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2614 *** New inline access method "ksu" (kerberized su).
2616 *** The following access methods are discontinued: "ssh1_old",
2617 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2619 *** The user option `remote-file-name-inhibit-cache' controls whether
2620 remote file attributes are cached for better performance.
2622 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2623 default value to "".
2625 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2626 for remote machines which support SELinux.
2628 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2629 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2630 the degree of parallelism.
2632 ** VC and related modes
2634 *** Support for pulling on distributed version control systems.
2635 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2636 supported (currently with Bzr, Git, and Mercurial), to update the
2637 current branch and working tree. A prefix argument means to prompt
2638 the user for specifics, e.g. a pull location.
2640 *** `vc-update' is now an alias for `vc-pull'.
2642 *** Support for merging on distributed version control systems.
2643 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2644 is supported (currently with Bzr, Git, and Mercurial), to merge
2645 changes from another branch into the current one. It prompts for
2646 specifics, e.g. a merge source.
2648 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2649 shows a diff while querying the user. It defaults to t.
2651 *** Log entries in some Log View buffers can be toggled to display a
2652 longer description by typing RET (log-view-toggle-entry-display).
2653 This is currently supported for Bzr, Git, and Mercurial (to support
2654 another backend, define a `log-view-expanded-log-entry-function').
2655 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2656 use this to display the full log entry for the revision at point.
2658 *** New command `vc-ediff' allows visual comparison of two revisions
2659 of a file similar to `vc-diff', but using ediff backend.
2661 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2662 this was not advertised at the time.
2664 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2665 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2666 this was not advertised at the time.
2672 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2674 *** partial-completion-mode (complete.el) is obsolete.
2675 You can get a comparable behavior with:
2676 (setq completion-styles '(partial-completion initials))
2677 (setq completion-pcm-complete-word-inserts-delimiters t)
2679 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2681 *** pgg is obsolete (use EasyPG instead).
2683 *** sregex.el is obsolete, since rx.el is a strict superset.
2685 *** s-region.el and pc-select.el are obsolete.
2686 They are superseded by shift-select-mode, enabled by default since 23.1.
2688 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2692 *** The Landmark game is now invoked with `landmark', not `lm'.
2693 Its functions and variables have been similarly renamed.
2695 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2696 (This interfered with cua-mode.)
2698 *** f90.el has some support for Fortran 2008 syntax.
2700 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2702 *** New command `nato-region' converts text to NATO phonetic alphabet.
2705 * New Modes and Packages in Emacs 24.1
2707 ** Occur Edit mode applies edits made in *Occur* buffers to the
2708 original buffers. It is bound to "e" in Occur mode.
2710 ** New global minor mode electric-pair-mode.
2711 When enabled, typing an open parenthesis automatically inserts the
2712 matching closing one.
2714 ** New global minor mode electric-indent-mode.
2715 When enabled, typing certain characters triggers reindentation.
2716 Major modes wishing to use this can set electric-indent-chars or
2717 electric-indent-functions.
2719 ** New global minor mode electric-layout-mode.
2720 When enabled, typing certain characters automatically inserts newlines.
2721 Major modes wishing to use this can set electric-layout-rules.
2723 ** tabulated-list.el provides a generic major mode for tabulated data,
2724 from which other modes can be derived.
2726 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2728 ** secrets.el is an implementation of the Secret Service API, an
2729 interface to password managers like GNOME Keyring or KDE Wallet. The
2730 Secret Service API requires D-Bus for communication. The command
2731 `secrets-show-secrets' offers a buffer with a visualization of the
2734 ** notifications.el provides an implementation of the Desktop
2735 Notifications API. It requires D-Bus for communication.
2737 ** soap-client.el supports access to SOAP web services from Emacs.
2738 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2740 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
2742 ** New emacs-lock.el package.
2743 The previous version has been moved to obsolete/old-emacs-lock.el.
2744 Now, there is a proper minor mode `emacs-lock-mode'. Protection
2745 against exiting Emacs and killing the buffer can be set separately.
2746 The mechanism for automatically turning off protection for buffers
2747 with dead inferior processes has been generalized.
2750 * Incompatible Lisp Changes in Emacs 24.1
2752 ** Passing a nil argument to a minor mode function call now ENABLES
2753 the minor mode unconditionally. This is so that you can write e.g.
2755 (add-hook 'text-mode-hook 'foo-mode)
2757 to enable foo-mode in Text mode buffers, removing the need for
2758 `turn-on-foo-mode' style functions. This affects all mode commands
2759 defined by `define-minor-mode'. If called interactively, the mode
2760 command still toggles the minor mode.
2762 ** The return value of `backup-buffer' has changed.
2763 It is now a list of three elements, where the second element is a list
2764 describing the original file's SELinux context. If Emacs or the
2765 system lacks SELinux support, the context list is (nil nil nil nil).
2766 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
2768 ** `char-direction-table' and the `char-direction' function were deleted.
2769 They were buggy and inferior to the new support of bidirectional
2770 editing introduced in Emacs 24. If you need the bidirectional
2771 properties of a character, use `get-char-code-property' with the last
2772 argument `bidi-class'.
2774 ** `copy-directory' now copies the source directory as a subdirectory
2775 of the target directory, if the latter is an existing directory. The
2776 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2777 the contents directly into a pre-existing target directory.
2779 ** For mouse click input events in the text area, the Y pixel
2780 coordinate in the POSITION list now counts from the top of the text
2781 area, excluding any header line. Previously, it counted from the top
2784 ** Support for "old-style" backquotes, obsolete for 10+ years, has
2785 been further reduced. Now a backquote not followed by a space is
2786 always treated as a "new-style" backquote. Please remove all
2787 "old-style" backquotes from your code. If your code uses backquotes
2788 as documented in the Elisp manual, and compiles without warning, then
2789 you have nothing to do in this regard. Code not following the
2790 appropriate conventions may fail to compile.
2792 The most common cause of trouble seems to be an old-style backquote
2793 followed by a newline. Another cause of trouble is vector notation
2794 for key sequence notation: instead of [(control ,)] and [(control ')],
2795 you should write [(control ?,)] and [(control ?')], which will work in
2798 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2799 was not advertised at the time. The function `custom-initialize-delay'
2800 replaced all known uses.
2802 ** `view-buffer' now treats special mode-class in the same way that
2803 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2804 major mode is special).
2806 ** Menu and tool bar changes
2808 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
2809 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2810 With these alist entries omitted, `make-frame' checks the value of the
2811 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2812 a menu-bar or tool-bar, respectively. If the alist entries are added,
2813 they override the value of `menu-bar-mode'/`tool-bar-mode'.
2815 *** The menu bar bindings's caches are not used any more.
2816 Use (where-is-internal <def> nil t) instead.
2818 ** Regions created by mouse dragging are now normal active regions,
2819 similar to those created by shift-selection (see Selection changes
2820 above). In previous Emacs versions, these regions were delineated by
2821 `mouse-drag-overlay'; that variable has been removed.
2823 ** The fourth argument of `filter-buffer-substring' has been removed.
2824 If you want to remove text properties from the final result, simply
2825 pass the result through substring-no-properties.
2827 ** cl.el no longer provides `cl-19'.
2829 ** The following obsolete functions and aliases have been removed
2830 (the appropriate new function is given in parentheses; "not needed"
2831 means you can just remove all calls to the function in question):
2833 *** `comint-kill-output' (`comint-delete-output')
2834 *** `decompose-composite-char' (`char-to-string')
2835 *** `outline-visible' (`outline-invisible-p')
2836 *** `internal-find-face' (`facep')
2837 *** `internal-get-face' (`facep and check-face')
2838 *** `frame-update-faces' (not needed)
2839 *** `frame-update-face-colors' (`frame-set-background-mode')
2840 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2841 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2842 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2843 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2844 *** `x-make-font-unbold' (`make-face-unbold')
2845 *** `x-make-font-unitalic' (`make-face-unitalic')
2846 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2847 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2848 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2849 *** `char-bytes' (== 1)
2850 *** `isearch-return-char' (`isearch-printing-char')
2851 *** `make-local-hook' (not needed)
2852 *** `set-screen-height' (`set-frame-height')
2853 *** `set-screen-width' (`set-frame-width')
2855 ** The following obsolete variables and varaliases have been removed
2856 (the appropriate new variable is given in parentheses):
2858 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2859 *** `vc-header-alist' (`vc-BACKEND-header')
2860 *** `directory-sep-char' (== ?/)
2861 *** `font-lock-defaults-alist' (`font-lock-defaults')
2862 *** `e' (`float-e').
2864 ** The following obsolete files were removed:
2865 sc.el, x-menu.el, rnews.el, rnewspost.el
2867 ** The format of the finder-inf.el file has changed, since the Finder
2868 mechanism is now based on the package system. The variable
2869 `finder-package-info' is replaced by `package--builtins' and
2870 `finder-keywords-hash'.
2872 ** When generating autoloads, `update-directory-autoloads' no longer
2873 assumes every inspected file is in your `load-path'. It instead
2874 generates relative names according to the current `load-path'.
2877 * Lisp Changes in Emacs 24.1
2879 ** Code can now use lexical scoping by default instead of dynamic scoping.
2880 The `lexical-binding' variable enables lexical scoping for local
2881 variables. It is typically set via a file-local variable in the first
2882 line of the file, in which case it applies to all the code in that
2885 *** `eval' takes a new optional argument `lexical' to choose the new lexical
2886 binding instead of the old dynamic binding mode.
2888 *** Lexically scoped interpreted functions are represented with a new form
2889 of function value which looks like (closure ENV ARGS &rest BODY).
2891 *** New macro `letrec' to define recursive local functions.
2893 *** `defvar' and `defconst' now mark the variable as special (dynamic).
2894 So do `defcustom' and other forms that call `defvar' as a subroutine.
2896 *** New function `special-variable-p' to check whether a variable is
2897 declared as dynamically bound.
2899 *** The form ((lambda ...) ...) is deprecated.
2901 ** An Emacs Lisp testing tool is now included.
2902 Emacs Lisp developers can use this tool to write automated tests for
2903 their code. See the ERT info manual for details.
2905 ** Changes for bidirectional display and editing
2907 *** New function `current-bidi-paragraph-direction'.
2908 This returns the base direction of the paragraph at point.
2910 *** New function `bidi-string-mark-left-to-right'.
2911 Given a string containing characters from right-to-left scripts, this
2912 function returns another string which can be safely inserted into a
2913 buffer, such that any following text will be always displayed to the
2914 right of that string. (This works by appending an invisible Unicode
2915 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
2917 This is useful when the buffer has overall left-to-right paragraph
2918 direction and you need to insert a string whose contents are not known
2919 in advance, without disrupting the layout of the line.
2923 *** Window tree functions are accessible in Elisp.
2924 Functions are provided to return the parent, siblings or child windows
2925 of any window including internal windows (windows not associated with a
2926 buffer) in the window tree.
2928 **** New function `window-valid-p' gives non-nil for live and internal
2931 **** Window manipulation can deal with internal windows.
2932 Many window handling functions like `split-window', `delete-window', or
2933 `delete-other-windows' as well as the window resizing functions can now
2934 act on any window including internal ones.
2936 *** window-total-height/-width vs window-body-height/-width.
2937 The function `window-height' has been renamed to `window-total-height'
2938 and `window-width' has been renamed to `window-body-width'. The old
2939 names are provided as aliases. Two new functions `window-total-width'
2940 and `window-body-height' are provided.
2942 *** Window parameters specific to window handling functions.
2943 For each window you can specify a parameter to override the default
2944 behavior of a number of functions like `split-window', `delete-window'
2945 and `delete-other-windows'. The variable `ignore-window-parameters'
2946 allows to ignore processing such parameters.
2948 *** New semantics of third argument of `split-window'.
2949 The third argument of `split-window' has been renamed to SIDE and can be
2950 set to any of the values 'below, 'right, 'above, or 'left to make the
2951 new window appear on the corresponding side of the window that shall be
2952 split. Any other value of SIDE will cause `split-window' to split the
2953 window into two side-by-side windows as before.
2955 *** Window resizing functions.
2956 A new standard function for resizing windows called `window-resize' has
2957 been introduced. This and all other functions for resizing windows no
2958 longer delete any windows when they become too small.
2960 *** Deleting the selected window now selects the most recently selected
2961 live window on that frame instead.
2963 *** `adjust-window-trailing-edge' adjustments.
2964 `adjust-window-trailing-edge' can now deal with fixed-size windows and
2965 is able to resize other windows if a window adjacent to the trailing
2966 edge cannot be shrunk any more. This makes its behavior more similar to
2967 that of Emacs 21 without compromising, however, its inability to delete
2968 windows which was introduced in Emacs 22.
2970 *** Window-local buffer lists.
2971 Windows now have local buffer lists. This means that removing a buffer
2972 from display in a window will preferably show the buffer previously
2973 shown in that window with its previous window-start and window-point
2974 positions. This also means that the same buffer may be automatically
2975 shown twice even if it already appears in another window.
2977 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2978 which if non-nil requires the buffer to be displayed in the currently
2979 selected window, signaling an error otherwise. If nil, another window
2980 can be used, e.g. if the selected one is strongly dedicated.
2982 *** `split-window-vertically' and `split-window-horizontally' renamed
2983 to `split-window-below' and `split-window-right' respectively.
2984 The old names are kept as aliases.
2988 **** The second arg to `display-buffer' and `pop-to-buffer' is now
2989 named ACTION, and takes a display action of the same form as
2990 `display-buffer-base-action' (see Changes, above). A non-nil,
2991 non-list value is treated specially, as the old meaning.
2993 **** New variable `display-buffer-overriding-action'.
2995 **** The procedure of `display-buffer' etc. to choose a window is
2996 determined by combining `display-buffer-overriding-action',
2997 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2998 and `display-buffer-fallback-action'. The second and fourth of these
2999 are user-customizable variables.
3001 See the docstring of `display-buffer' for details.
3003 *** New functions `window-state-get' and `window-state-put'.
3004 These functions allow to save and restore the state of an arbitrary
3005 frame or window as an Elisp object.
3009 *** New variable `completion-extra-properties' used to specify extra
3010 properties of the current completion:
3011 - :annotate-function, same as the old completion-annotate-function.
3012 - :exit-function, function to call after completion took place.
3014 *** Functions on `completion-at-point-functions' can return any of the
3015 properties valid for `completion-extra-properties'.
3017 *** `completion-annotate-function' is obsolete.
3019 *** New `metadata' method for completion tables. The metadata thus returned
3020 can specify various details of the data returned by `all-completions':
3021 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3022 used to select a style in completion-category-overrides.
3023 - `annotation-function' to add annotations in *Completions*.
3024 - `display-sort-function' to specify how to sort entries in *Completions*.
3025 - `cycle-sort-function' to specify how to sort entries when cycling.
3027 *** `minibuffer-local-filename-must-match-map' is not used any more.
3028 Instead, the bindings in `minibuffer-local-filename-completion-map'
3029 are combined with `minibuffer-local-must-match-map'.
3031 *** New variable `completing-read-function' allows overriding the
3032 behavior of `completing-read'.
3034 ** `glyphless-char-display' can now distinguish between graphical and
3035 text terminal display, via a char-table entry that is a cons cell.
3037 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3038 Instead, the offending function is removed.
3042 *** New function `run-hook-wrapped' for running an abnormal hook by
3043 passing the hook functions as arguments to a "wrapping" function.
3044 Like `run-hook-with-args-until-success', it stops at the first
3045 non-nil return value.
3047 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3048 set of "wrapping" filters, similar to around advice.
3049 (A version of this macro was actually added in Emacs 23.2 but was not
3050 advertised at the time.)
3054 *** New macro `condition-case-unless-debug' (this was actually added in
3055 Emacs 23.1 as condition-case-no-debug, but not advertised)
3057 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3059 *** Variable `stack-trace-on-error' removed.
3061 *** The debugger can now "continue" from an error, which means it will
3062 jump to the error handler as if the debugger had not been invoked
3063 instead of jumping all the way to the top-level.
3065 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3066 This can be useful when `inhibit-quit' is set.
3068 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3069 named Emacs server instances.
3071 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3072 to redirect STDOUT to a file.
3074 ** The function `format-time-string' now supports the %N directive,
3075 for higher-resolution time stamps.
3077 ** New input reading functions
3079 *** New function `read-char-choice' reads a restricted set of
3080 characters, discarding any inputs not inside the set.
3082 *** The command `read-color' now requires a match for a color name
3083 or RGB triplet, instead of signaling an error if the user provides
3086 **** `facemenu-read-color' is now an alias for `read-color'.
3088 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3089 The variable is now used to load all kind of supported dynamic libraries,
3090 not just image libraries. The previous name is still available as an
3093 ** Syntax parsing changes
3095 *** New variable `syntax-propertize-function'.
3096 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3097 This allows syntax-table properties to be set independently from font-lock:
3098 just call syntax-propertize to make sure the text is propertized.
3099 Together with this new variable come a new hook
3100 syntax-propertize-extend-region-functions, as well as two helper functions:
3101 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3102 as-is; and syntax-propertize-rules which provides a new way to specify
3105 *** Syntax tables support a new "comment style c" additionally to style b.
3107 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3109 ** frame-local variables cannot be let-bound any more.
3111 ** Major and minor mode changes
3113 *** `set-auto-mode' now respects mode: local variables at the end of files,
3114 as well as those in the -*- line.
3116 *** `prog-mode' is a new major mode from which programming modes
3119 **** `prog-mode-hook' can be used to enable features for programming
3120 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3121 on-the-fly spell checking for comments and strings.
3123 **** New minor modes `prettify-symbols-mode' and
3124 `global-prettify-symbols-mode' let the user enable symbol
3125 prettification (replacing a string like "lambda" with the Greek lambda
3128 *** New hook `change-major-mode-after-body-hook', run by
3129 `run-mode-hooks' just before any other mode hooks.
3131 *** Enabled globalized minor modes can be disabled in specific major modes.
3132 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3133 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3135 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3137 ** File-handling changes
3139 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3140 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3141 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3142 argument is supplied (see Trash changes, above).
3144 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3146 ** Tool-bars can display separators.
3147 Tool-bar separators are handled like menu separators in menu-bar maps,
3148 i.e. via menu entries of the form `(menu-item "--")'.
3152 *** Animated images support (currently animated gifs only).
3154 **** `image-animated-p' returns non-nil if an image can be animated.
3156 **** `image-animate' animates a supplied image spec.
3158 **** `image-animate-timer' returns the timer object for an image that
3161 *** `image-extension-data' has been renamed to `image-metadata'.
3162 The old name is an obsolete alias to the new one.
3164 *** Image mode can view any image type that ImageMagick supports.
3165 This requires Emacs to be built with ImageMagick support.
3167 **** New function `imagemagick-types', defined if ImageMagick support
3168 is enabled, returns a list of image file extensions that your
3169 ImageMagick installation supports.
3171 **** New function `imagemagick-register-types' enables ImageMagick
3172 image types in Image mode and in `create-image' and other helper
3175 **** New option `imagemagick-types-inhibit' excludes certain
3176 ImageMagick image types from `imagemagick-register-types'.
3178 **** With ImageMagick support, there are extra Image mode commands to
3179 resize and rotate images: `image-transform-fit-to-height',
3180 `image-transform-fit-to-width', `image-transform-set-rotation', and
3181 `image-transform-set-scale'.
3183 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3184 passes it to the mail user agent function. This argument specifies an
3185 action for returning to the caller after finishing with the mail. For
3186 example, this is used by Rmail to optionally delete a mail window.
3188 ** XML and HTML parsing
3189 If Emacs is compiled with libxml2 support, there are two new
3190 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3191 and `libxml-parse-xml-region' (which parses XML). Both return an
3192 Emacs Lisp parse tree.
3194 ** Networking and encryption changes
3196 *** `open-network-stream' can now be used to open an encrypted stream.
3197 It now accepts an optional `:type' parameter for initiating a TLS
3198 connection, directly or via STARTTLS. To do STARTTLS, additional
3199 parameters (`:end-of-command', `:success', `:capabilities-command')
3200 must also be supplied.
3202 *** New library gnutls.el.
3203 The new function `gnutls-available-p' returns non-nil if Emacs is
3204 built with GnuTLS support. The main entry points are
3205 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3206 these functions through `open-network-stream', because that can
3207 upgrade connections through STARTTLS opportunistically or use plain
3208 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3211 *** New primitive `secure-hash' that supports many secure hash algorithms:
3212 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3213 sha1.el has been removed. The `sha1' feature is provided by default.
3217 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3219 ** Progress reporters can now "spin".
3220 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3221 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3222 time you call `progress-reporter-update' on that progress reporter,
3223 with a nil or omitted VALUE argument, the reporter message is
3224 displayed with a "spinning bar".
3226 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3227 being reverted, even if the buffer has a local `revert-buffer-function'.
3229 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3230 If delayed-warnings-list is non-nil, the command loop calls
3231 `delayed-warnings-hook' after `post-command-hook'. At present, this
3232 is only used by Emacs on some platforms to display warnings during
3233 startup, which might otherwise not be noticed. This uses the
3234 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3236 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3238 ** New function `make-composed-keymap' that constructs a new keymap
3239 from multiple input maps. You can use this to make a keymap that
3240 inherits from multiple maps, eg:
3241 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3243 ** New function `string-prefix-p'.
3244 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3246 ** New reader macro ## that stands for the empty symbol.
3247 This means that the empty symbol can now be read back. Also, #: by itself
3248 (when not immediately followed by a possible symbol character) stands for
3249 an empty uninterned symbol.
3251 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3253 ** The following functions and variables are obsolete:
3255 *** `tooltip-use-echo-area' is obsolete.
3256 Rather than setting this to t, disable Tooltip mode instead.
3258 *** buffer-substring-filters is obsolete.
3259 Use `filter-buffer-substring-functions' instead.
3261 *** `byte-compile-disable-print-circle' is obsolete.
3263 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3264 Use `post-command-hook' instead.
3266 *** `font-lock-maximum-size' is obsolete.
3269 * Changes in Emacs 24.1 on Non-Free Operating Systems
3271 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3272 and also when HOME is set to C:\ by default.
3274 ** New configure.bat options
3276 *** --enable-checking builds Emacs with extra runtime checks.
3278 *** --distfiles specifies files to be included in binary distribution.
3280 *** --without-gnutls disables automatic GnuTLS detection.
3282 *** --lib for general library linkage, works with the USER_LIBS build variable.
3284 ** New make target `dist' to create binary distribution for MS Windows.
3286 ** The Lisp function `w32-default-color-map' is now obsolete.
3287 (It is only used internally in the Emacs C code.)
3289 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3290 reappear on mouse-over. (Requires OS X 10.6 or later.)
3292 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3293 other platforms, rather than inserting its contents into the buffer.
3296 ----------------------------------------------------------------------
3297 This file is part of GNU Emacs.
3299 GNU Emacs is free software: you can redistribute it and/or modify
3300 it under the terms of the GNU General Public License as published by
3301 the Free Software Foundation, either version 3 of the License, or
3302 (at your option) any later version.
3304 GNU Emacs is distributed in the hope that it will be useful,
3305 but WITHOUT ANY WARRANTY; without even the implied warranty of
3306 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3307 GNU General Public License for more details.
3309 You should have received a copy of the GNU General Public License
3310 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3315 paragraph-separate: "[
\f]*$"