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 ** The -L option, which normally prepends its argument to load-path,
67 will instead append, if the argument begins with `:'.
70 * Changes in Emacs 24.4
73 ** Emacs now supports menus on text-mode terminals.
74 If the terminal supports a mouse, clicking on the menu bar, or on
75 sensitive portions of the mode line or header line, will drop down the
76 menu defined at that position. Likewise, clicking C-mouse-2 or
77 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
80 If the text terminal does not support a mouse, you can activate the
81 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
83 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
84 customize the option `tty-menu-open-use-tmm' to a non-nil value.
85 (Typing M-` will always invoke `tmm-menubar', even if
86 `tty-menu-open-use-tmm' is nil.)
88 ** Key ? also describes prefix bindings like C-h.
91 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
92 because it affects caching of paragraph scanning results as well.
95 ** `apropos-variable' is now `apropos-user-option'
96 `apropos-user-option' shows all user options while `apropos-variable'
97 shows all variables. When called with a universal prefix argument,
98 the two commands swap their behaviors. When `apropos-do-all' is
99 non-nil, they output the same results.
102 ** `eval-defun' on an already defined defcustom calls the :set function,
105 ** If the new variable `enable-dir-local-variables' is nil,
106 directory local variables are ignored. May be useful for some modes
107 that want to ignore directory-locals while still respecting file-locals.
109 ** The option `set-mark-default-inactive' has been deleted.
110 This unfinished feature was introduced by accident in Emacs 23.1;
111 simply disabling Transient Mark mode does the same thing.
113 ** `initial-buffer-choice' can now specify a function to set up the
116 ** The *Messages* buffer is created in a new major mode `messages-buffer-mode',
117 and read-only. Code that might create the *Messages* buffer should
118 call the function `messages-buffer' to do so and set the mode.
120 ** `remember-notes' creates a buffer whose content is saved on kill-emacs.
121 You may think of it as a *scratch* buffer whose content is preserved.
122 In fact, it was designed as a replacement for *scratch* buffer and can
123 be used that way by setting `initial-buffer-choice' to `remember-notes'
124 and `remember-notes-buffer-name' to "*scratch*". Without the second
125 change, *scratch* buffer will still be there for notes that do not
126 need to be preserved.
128 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
130 ** ACL support has been added.
132 *** Emacs preserves the ACL entries of files when backing up.
134 *** New functions `file-acl' and `set-file-acl' get and set the ACL
135 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
136 libacl. On MS-Windows, the NT Security APIs are used to emulate the
137 POSIX ACL interfaces.
139 ** New option `scroll-bar-adjust-thumb-portion'.
140 Available only on X, this option allows to control over-scrolling
141 using the scroll bar (i.e. dragging the thumb down even when the end
142 of the buffer is visible).
144 ** New function `add-face-text-property' has been added, which can be
145 used to conveniently prepend/append new face attributes to text.
147 ** In compiled Lisp files, the header no longer includes a timestamp.
149 ** Multi-monitor support has been added.
151 *** New functions `display-monitor-attributes-list' and
152 `frame-monitor-attributes' can be used to obtain information about
153 each physical monitor on multi-monitor setups.
155 *** The functions `display-pixel-width' and `display-pixel-height' now
156 behave consistently among the platforms: they return the pixel width
157 or height for all physical monitors associated with the given display
158 as just they were on X11. To get information for each physical
159 monitor, use the new functions above. Similar notes also apply to
160 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
161 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
163 ** New macro `alternatives-define' can be used to define generic commands.
164 Generic commands are interactive functions whose implementation can be
165 selected among several alternatives, as a matter of user preference.
167 ** The blink cursor stops blinking after 10 blinks (default) on X and NS.
168 You can change the default by customizing the variable blink-cursor-blinks.
169 Also timers for blinking are stopped when no blinking is done, so Emacs does
170 not consume CPU cycles.
172 ** New command `frameset-to-register' is now bound to `C-x r f', replacing
173 `frame-configuration-to-register'. It offers similar functionality, plus
174 some enhancements, like the ability to restore deleted frames. Command
175 `frame-configuration-to-register' is still available, but unbound.
177 ** The command `quail-help' is deleted. Use `C-h C-\'
178 (`describe-input-method') instead.
180 ** The default value of `comment-use-global-state' is changed to t,
181 and this variable has been marked obsolete.
184 * Editing Changes in Emacs 24.4
186 ** New command `rectangle-mark' makes a rectangular region.
187 Most commands are still unaware of it, but kill/yank do work on the rectangle.
189 ** C-x TAB enters a transient interactive mode.
190 You can then use the left/right cursor keys to move the block of text.
192 ** `tab-stop-list' is now implicitly extended to infinity by repeating
193 the last step. Its default value is changed to nil which means a tab
194 stop every `tab-width' columns.
196 ** `split-window' is no longer a command, just a non-interactive function.
197 As a command it was a special case of `split-window-below', and as such
198 superfluous. After being reimplemented in Lisp, its interactive form
199 was mistakenly retained.
201 ** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
202 bound to <f11> and M-<f10>, respectively.
204 ** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
208 ** New option `visual-order-cursor-movement'.
209 If this is non-nil, cursor motion with arrow keys will follow the
210 visual order of characters on the screen: <left> always moves to the
211 left, <right> always moves to the right, disregarding the surrounding
212 bidirectional context.
214 ** All register commands can now show help with preview.
216 ** New command `kmacro-to-register' to store keyboard macros in registers.
220 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
221 You can pick the name of the function and the variables with `C-x 4 a'.
224 * Changes in Specialized Modes and Packages in Emacs 24.4
226 ** prolog-use-smie has been removed, along with the non-SMIE indentation code.
228 ** SMIE indentation can be customized via `smie-config'.
229 The customizaton can be guessed by Emacs by providing a sample indented
230 file and letting SMIE learn from it.
232 ** sh-script now uses its SMIE indentation algorithm by default.
234 ** The debugger's `e' command evaluates the code in the context at point.
235 This includes using the lexical environment at point, which means that
236 `e' now lets you access lexical variables as well.
238 ** `eshell' now supports visual subcommands and options
239 Eshell has been able to handle "visual" commands (interactive,
240 non-line oriented commands such as top that require display
241 capabilities not provided by eshell) by running them in an Emacs
242 terminal emulator. See `eshell-visual-commands'.
244 This feature has been extended to subcommands and options that make a
245 usually line-oriented command a visual command. Typical examples are
246 "git log" and "git <command> --help" which display their output in a
247 pager by default. See `eshell-visual-subcommands' and
248 `eshell-visual-options'.
250 ** If your Emacs is compiled with libxml2 support, you can use the new
251 built-in web browser `eww'.
253 ** `remember' can now store notes in separates files
254 You can use the new function `remember-store-in-files' within the
255 `remember-handler-functions' option.
257 See `remember-data-directory' and `remember-directory-file-name-format'
258 for new options related to this function.
260 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
262 ~/.emacs.d/timelog replaces ~/.timelog
263 ~/.emacs.d/vip replaces ~/.vip
264 ~/.emacs.d/viper replaces ~/.viper
265 ~/.emacs.d/ido.last replaces ~/.ido.last
266 ~/.emacs.d/kkcrc replaces ~/.kkcrc
267 ~/.emacs.d/quickurls replaces ~/.quickurls
268 ~/.emacs.d/idlwave replaces ~/.idlwave
269 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
270 ~/.emacs.d/places replaces ~/.emacs-places
271 ~/.emacs.d/shadows replaces ~/.shadows
272 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
273 ~/.emacs.d/strokes replaces ~/.strokes
274 ~/.emacs.d/notes replaces ~/.notes
275 ~/.emacs.d/type-break replaces ~/.type-break
276 Also the following files used by the now obsolete otodo-mode.el:
277 ~/.emacs.d/todo-do replaces ~/.todo-do
278 ~/.emacs.d/todo-done replaces ~/.todo-done
279 ~/.emacs.d/todo-top replaces ~/.todo-top
282 ** Delphi mode is now called OPascal mode.
283 *** All delphi-* variables and functions have been renamed to opascal-*.
284 *** `delphi-newline-always-indents' is not supported any more.
285 Use `electric-indent-mode' instead.
286 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
288 ** Eldoc Mode works properly in the minibuffer.
290 ** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
292 ** completing-read-multiple's separator can now be a regexp.
293 The default separator is changed to allow surrounding spaces around the comma.
297 *** Battery information via the BSD `apm' utility is now supported.
301 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
303 ** Calendar and Diary
305 *** New faces: `calendar-weekday-header', `calendar-weekend-header',
306 `calendar-month-header'.
308 *** New option `calendar-day-header-array'.
310 *** The variable `calendar-font-lock-keywords' is obsolete.
313 *** New variable `diary-from-outlook-function', used by the command
314 `diary-from-outlook'.
316 ** VC and related modes
318 *** In VC directory mode, `D' displays diffs between VC-controlled
319 whole tree revisions.
321 *** In VC directory mode, `L' lists the change log for the current VC
322 controlled tree in a window.
324 *** In VC directory mode, `I' shows a log of changes that will be
325 received with a pull operation.
327 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
328 under current version control system. When called with a prefix
329 argument, you can remove a file from the ignored file list.
331 *** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
332 because it is moved to vc-cvs.el.
336 *** New macro cl-tagbody.
339 *** letf is now just an alias for cl-letf.
343 *** Calc by default now uses the Gregorian calendar for all dates, and
344 uses January 1, 1 AD as its day number 1. Previously Calc used the
345 Julian calendar for dates before September 14, 1752, and it used
346 December 31, 1 BC as its day number 1; the new scheme is more
347 consistent with Calendar's calendrical system and day numbering.
349 *** The new variable `calc-gregorian-switch' lets you configure the
350 date when Calc switches from the Julian to the Gregorian calendar.
351 Nil, the default value, means to always use the Gregorian calendar.
352 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
355 *** Support for ISO 8601 dates.
359 *** `desktop-auto-save-timeout' defines the number of seconds between
360 auto-saves of the desktop.
362 *** `desktop-restore-frames', enabled by default, allows saving and
363 restoring the frame/window configuration (frameset). Additional options
364 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
365 and `desktop-restore-forces-onscreen' offer further customization.
369 *** New minor mode `dired-hide-details-mode' hides details.
373 *** New option `erc-accidental-paste-threshold-seconds'.
374 If set to a number, this can be used to avoid accidentally paste large
375 amounts of data into the ERC input.
379 *** New option `epa-mail-aliases'.
381 You can set this to a list of alias expansions for keys to use
382 in `epa-mail-encrypt'.
384 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
385 that means: when one of the recipients of the message being encrypted
386 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
388 If one element of the variable's value is ("foo@bar.com"),
389 that means: when one of the recipients of the message being encrypted
390 is `foo@bar.com', ignore that name as regards encryption.
391 This is useful to avoid a query when you have no key for that name.
394 ** New F90 mode option `f90-smart-end-names'.
396 ** Icomplete is a bit more like Ido.
397 *** key bindings to navigate through and select the completions.
398 *** The icomplete-separator is customizable, and its default has changed.
399 *** Removed icomplete-show-key-bindings.
400 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
401 (setq icomplete-with-completion-tables '(internal-complete-buffer))
402 will revert to the old behavior.
406 *** Ido has a manual now.
407 *** `ido-use-virtual-buffers' takes a new value 'auto.
408 *** `ido-decorations' has been slightly extended to give a bit more control.
412 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
413 visit the next image file and the previous image file in the same
414 directory, respectively.
416 *** New commands to show specific frames of multi-frame images.
417 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
418 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
420 *** New commands to speed up, slow down, or reverse animation.
423 *** The command `image-mode-fit-frame' deletes other windows.
424 When toggling, it restores the frame's previous window configuration.
425 It also has an optional frame argument, which can be used by Lisp
426 callers to fit the image to a frame other than the selected frame.
430 *** New face `info-index-match' is used to highlight matches in index
431 entries displayed by `Info-index-next', `Info-virtual-index' and
436 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
437 will cycle through faces in `hi-lock-face-defaults' without prompting.
440 *** New global command `M-s h .' (`highlight-symbol-at-point')
441 highlights the symbol found near point without prompting,
442 using the next face automatically.
444 ** Search and Replace
446 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
447 starts a symbol (identifier) incremental search forward with the
448 symbol found near point added to the search string initially.
450 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
451 and adds it to the search string.
453 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
454 between nil and the value of the option `search-invisible' (or `open'
457 *** `query-replace' skips invisible text when `search-invisible' is nil,
458 and opens overlays with hidden text when `search-invisible' is `open'.
461 *** By default, prefix arguments do not now terminate Isearch mode.
462 Set `isearch-allow-prefix' to nil to restore old behavior.
464 *** More Isearch commands accept prefix arguments, namely
465 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
468 *** Word search now matches whitespace at the beginning/end
469 of the search string if it contains leading/trailing whitespace.
470 In an incremental word search or when using a non-nil LAX argument
471 of `word-search-regexp', the lax matching can also match part of
472 the first word (in addition to the lax matching of the last word).
473 The same rules are now applied to the symbol search with the difference
474 that it matches symbols, and non-symbol characters between symbols.
476 ** MH-E has been updated to MH-E version 8.5.
477 See MH-E-NEWS for details.
480 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
481 Customize `unrmail-mbox-format' to change this.
484 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
485 of how Rmail displays non-MIME messages.
488 ** New function `ses-rename-cell' to give SES cells arbitrary names.
490 ** trace-function was largely rewritten.
491 New features include:
492 - no prompting for the destination buffer, unless a prefix-arg was used.
493 - additionally to prompting for a destination buffer, when a prefix-arg is
494 used, the user can enter a "context", i.e. Lisp expression whose value at the
495 time the function is entered/exited will be printed along with the function
496 name and arguments. Useful to trace the value of (current-buffer) or
497 (point) when the function is invoked.
499 ** New command `delete-duplicate-lines' has new types of operation:
500 When its arg ADJACENT is non-nil (when called interactively with C-u C-u)
501 it works like the utility `uniq'. Otherwise by default it deletes
502 duplicate lines everywhere in the region without regard to adjacency.
503 When its arg KEEP-BLANKS is non-nil (when called interactively with
504 C-u C-u C-u), duplicate blank lines are preserved.
506 ** New `cycle-spacing' command allows cycling between having just one
507 space, no spaces, or reverting to the original spacing. Like
508 `just-one-space' command it can handle or ignore newlines and
509 leave different number of spaces.
511 ** Todo mode has been rewritten and enhanced.
512 New features include:
513 - support for multiple todo files and archive files of done items;
514 - renaming, reordering, moving, merging, and deleting categories;
515 - sortable tabular summaries of categories and the types of items they contain;
516 - cross-category lists of items filtered by specific criteria;
517 - more fine-grained interaction with the Emacs diary, by being able to decide
518 for each todo item whether it appears in the Fancy Diary display;
519 - highly flexible new item insertion and item editing;
520 - moving items between categories, storing done items in their category or in
521 archive files, undoing or unarchiving done items;
522 - reprioritizing items by inputting a numerical priority;
523 - extensive customizability of operation and display, including numerous faces.
524 The Todo mode user manual describes all commands and most user options.
525 To support some of these features, a new file format is used, which is
526 incompatible with the old format; however, you can convert old todo and done
527 item files to the new format on initializing the first new todo file, or at any
528 later time with the provided conversion command. The old version of
529 todo-mode.el has been made obsolete and renamed otodo-mode.el.
533 *** The experimental url syntax for remote file names is withdrawn.
536 *** New connection method "adb", which allows to access Android
537 devices by the Android Debug Bridge. The variable `tramp-adb-program'
538 can be used to adapt the path of the "adb" program, if needed.
540 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
541 "scpc" and "rsyncc" are discontinued. The ssh option
542 "ControlMaster=auto" is set automatically in all ssh-based methods,
546 *** Handlers for `file-acl' and `set-file-acl' for remote machines
547 which support POSIX ACLs.
550 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
551 for remote machines which support filesystem notifications.
555 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
557 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
561 *** The commands `woman-default-faces' and `woman-monochrome-faces'
562 are obsolete. Customize the `woman-*' faces instead.
566 *** Added Eshell-Tramp module
567 External su and sudo commands are now the default; the internal,
568 Tramp-using variants can still be used by enabling the eshell-tramp
573 *** The format of `archive-contents' files, generated by package
574 repositories, has changed to allow a new (fifth) element in the data
575 vectors, containing an associative list with extra properties.
577 *** `describe-package' buffer uses the `:url' extra property to
578 display a `Homepage' header, if it's present.
580 ** New term.el option `term-suppress-hard-newline'.
582 ** Obsolete packages:
584 *** longlines.el is obsolete; use visual-line-mode instead.
589 *** terminal.el is obsolete; use term.el instead.
591 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
596 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
599 *** The Info-edit command is obsolete. Editing Info nodes by hand
600 has not been relevant for some time.
604 *** `explicit-bash-args' now always defaults to use --noediting.
605 During initialization, Emacs no longer expends a process to decide
606 whether it is safe to use Bash's --noediting option. These days
607 --noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
610 ** There is a new macro `skip-unless' for skipping ERT tests. See the manual.
613 * New Modes and Packages in Emacs 24.4
615 ** New `superword-mode' in subword.el
616 `superword-mode' overrides the default word motion commands to treat
617 symbol_words as a single word, similar to what `subword-mode' does and
618 using the same internal functions.
620 ** New nadvice.el package offering lighter-weight advice facilities.
622 - add-function/remove-function which can be used to add/remove code on any
623 function-carrying place, such as process-filters or `<foo>-function' hooks.
624 - advice-add/advice-remove to add/remove a piece of advice on a named function,
625 much like `defadvice' does.
627 ** New frameset.el package.
628 It provides a set of operations to save a frameset (the state of all
629 or a subset of the existing frames and windows, somewhat similar to a
630 frame configuration), both in-session and persistently, and restore it
631 at some point in the future.
634 ** The package filenotify.el provides an interface for file system
635 notifications. It requires, that Emacs is compiled with one of the
636 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
639 * Incompatible Lisp Changes in Emacs 24.4
641 ** `kill-region' lost its `yank-handler' optional argument.
643 ** `(input-pending-p)' no longer runs other timers which are ready to
644 run. The new optional CHECK-TIMERS param allows for the prior behavior.
646 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
648 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
649 Some languages match those as »...« and others as «...» so better stay neutral.
651 ** The default file coding for Emacs Lisp files is now utf-8.
652 (See file-coding-system-alist.) In most cases, this change is transparent, but
653 files that contain unusual characters without specifying an explicit coding
654 system may fail to load with obscure errors.
655 You should either convert them to utf-8 or add an explicit `coding:' cookie.
657 ** overriding-terminal-local-map does not replace the local keymaps any more.
658 It used to disable the minor mode, major mode, and text-property keymaps,
659 whereas now it simply has higher precedence.
661 ** Default process filters and sentinels are not nil any more.
662 Instead they default to a function which does what the nil value used to do.
664 ** `read-event' does not return decoded chars in ttys any more.
665 Just as was the case in Emacs-22 and before, decoding of tty input according to
666 keyboard-coding-system is not performed in read-event any more. But contrary
667 to that past, it is still done before input-decode-map/function-key-map/...
669 ** Removed inhibit-local-menu-bar-menus.
671 ** frame-local variables that affect redisplay do not work any more.
672 More specifically, the redisplay does not bother to check for a frame-local
673 value when looking up variables.
675 ** nil and "unbound" are indistinguishable in symbol-function.
676 `symbol-function' never signals `void-function' any more.
677 `fboundp' returns non-nil if the symbol was `fset' to nil.
679 ** `defadvice' does not honor the `freeze' flag and cannot advise
680 special-forms any more.
682 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
683 VAR was bound to nil which was not tremendously useful and just lead to
684 spurious warnings about an unused var.
686 ** The return value of `backup-buffer' has changed.
687 The second argument is no longer an SELinux context, instead it is an
688 alist of extended attributes as returned by the new function
689 `file-extended-attributes'. The attributes can be applied to another
690 file using `set-file-extended-attributes'.
692 ** `visited-file-modtime' now returns -1 for nonexistent files.
693 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
694 in the presence of files with negative time stamps.
696 ** The cars of the elements in `interpreter-mode-alist' are now treated
697 as regexps rather than literal strings. Technically this is an
698 incompatible change, but unless you are using interpreter-mode-alist
699 for something (not just adding elements to it), it ought not to affect you.
702 * Lisp Changes in Emacs 24.4
704 ** New hook `pre-redisplay-function'.
707 ** Functions that pop up menus and dialogs now work on all terminal types,
709 This includes `x-popup-menu', `x-popup-dialog', `message-box',
712 The function `display-popup-menus-p' will now return non-nil for a
713 display or frame whenever a mouse is supported on that display or
716 ** New bool-vector set operation functions:
717 *** `bool-vector-exclusive-or'
718 *** `bool-vector-union'
719 *** `bool-vector-intersection'
720 *** `bool-vector-set-difference'
721 *** `bool-vector-not'
722 *** `bool-vector-subsetp'
723 *** `bool-vector-count-matches'
724 *** `bool-vector-count-matches-at'
726 ** Comparison functions =, <, >, <=, >= now take many arguments.
728 ** The second argument of `eval' can now be a lexical-environment.
730 ** `with-demoted-errors' takes an additional argument `format'.
732 ** New function `define-error'.
734 ** New hook `tty-setup-hook'.
737 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
739 ** Obsoleted functions:
742 *** `lisp-complete-symbol'
744 *** `minibuffer-completion-contents'
745 *** `isearch-nonincremental-exit-minibuffer'
746 *** `isearch-filter-visible'
747 *** `generic-make-keywords-list'
749 ** `with-wrapper-hook' is obsoleted by `add-function'.
750 The few hooks that used with-wrapper-hook are replaced as follows:
751 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
752 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
753 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
755 ** `split-string' now takes an optional argument TRIM.
756 The value, if non-nil, is a regexp that specifies what to trim from
757 the start and end of each substring.
759 ** `get-upcase-table' is obsoleted by the new `case-table-get-table'.
761 ** Support for filesystem notifications.
762 Emacs now supports notifications of filesystem changes, such as
763 creation, modification, and deletion of files. This requires the
764 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
765 MS-Windows systems, this is supported for Windows XP and newer
768 ** Changes in autorevert.el
771 *** If Emacs is compiled with file notification support, notifications
772 are used instead of checking the time stamp of the files. You can
773 disable this by setting the user option `auto-revert-use-notify' to
774 nil. Alternatively, a regular expression of directories to be
775 excluded from file notifications can be specified by
776 `auto-revert-notify-exclude-dir-regexp'.
779 *** The new user option `auto-revert-remote-files' enables reversion
780 of remote files when set to non-nil.
784 *** The function `face-spec-set' is now analogous to `setq' for face specs.
785 Its third arg now accepts values specifying exactly which face spec to
786 set (defface, custom, or user spec), and it directly sets the relevant
787 property using the supplied face spec.
789 *** Face specs set via Custom themes now replace the `defface' spec
790 rather than inheriting from it (as do face specs set via Customize).
792 *** New face characteristic (supports :underline (:style wave))
793 specifies whether or not the terminal can display a wavy line.
795 *** New face spec attribute :distant-foreground
796 specifies foreground to use if background color is near the foreground
797 color that would otherwise have been used.
802 *** `image-animated-p' is now `image-multi-frame-p'.
803 It returns non-nil for any image that contains multiple frames,
804 whether or not it specifies a frame delay.
807 *** When animating images that do not specify a frame delay,
808 Emacs uses `image-default-frame-delay'.
811 *** New functions `image-current-frame' and `image-show-frame' for getting
812 and setting the current frame of a multi-frame image.
814 *** You can change the speed of animated images.
816 ** Changes in encoding and decoding of text
819 *** New coding-system `prefer-utf-8'.
820 This is like `undecided' but prefers UTF-8 on decoding if the text to
821 be decoded does not contain any invalid UTF-8 sequences. On encoding,
822 any non-ASCII characters are automatically encoded as UTF-8.
825 *** New attributes of coding-systems whose type is `undecided'.
826 Two new attributes, `:inhibit-null-byte-detection' and
827 `:inhibit-iso-escape-detection', determine how to detect encoding of
828 text that includes null bytes and ISO-2022 escape sequences,
829 respectively. Each of these attributes can be either nil, zero, or
830 t. If it is t, decoding text ignores null bytes and, respectively,
831 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
832 with no-conversion and ISO-2022 sequences cause Emacs to assume the
833 text is encoded in one of the ISO-2022 encodings, such as
834 iso-2022-7bit. If the value is zero, Emacs consults the variables
835 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
837 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
838 UTF-8 encoding and decoding, whenever possible.
840 These attributes are only meaningful for coding-systems of type
841 `undecided'. (The type of a coding-system is determined by its
842 `:coding-type' attribute and can be accessed by calling the
843 `coding-system-type' function.)
845 ** The function `set-visited-file-modtime' now accepts a 0 or -1 argument
846 with the same interpretation as the returned value of `visited-file-modtime'.
848 ** time-to-seconds is not obsolete any more.
849 ** New functions special-form-p and macrop.
850 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
851 text-property on the first char.
853 ** The `defalias-fset-function' property lets you catch calls to defalias
854 and redirect them to your own function instead of `fset'.
856 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
857 When you edit DIR/FILE, Emacs normally creates a symbolic link
858 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
859 is being edited. Formerly, if there was already a non-symlink file
860 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
861 through DIR/.#FILE.9. These fallbacks have been removed, so that
862 Emacs now no longer locks DIR/FILE in that case.
864 On file systems that do not support symbolic links, the lock is now a
865 regular file with contents being what would have been in the symlink.
867 ** The 9th element returned by `file-attributes' is now unspecified.
868 Formerly, it was t if the file's gid would change if file were deleted
869 and recreated. This value has been inaccurate for years on many
870 platforms, and nobody seems to have noticed or cared.
872 ** The function `file-ownership-preserved-p' now has an optional
873 argument GROUP which causes it check for file group too. This can be
874 used in place of the 9th element of `file-attributes'.
876 ** New functions `group-gid' and `group-real-gid'.
878 ** The 6th argument to `copy-file' has been renamed to
879 `preserve-extended-attributes' as it now handles both SELinux context
882 ** The `common-substring' argument of display-completion-list is obsolete.
883 Either use `completion-all-completions' which already returns highlighted
884 strings (including for partial or substring completion) or call
885 `completion-hilit-commonality' to add the highlight.
887 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
889 *** The package descriptor and name of global variables, constants,
890 and functions should be separated by two hyphens if the symbol is not
891 meant to be used by other packages.
894 * Changes in Emacs 24.4 on Non-Free Operating Systems
896 ** The procedure for building Emacs on MS-Windows has changed.
897 It is now built by running the same configure script as on all other
898 platforms. This requires the MSYS environment and MinGW development
899 tools. See the updated instructions in nt/INSTALL for details.
901 Using the Posix configure script and Makefile's also means a change in
902 the directory structure of the Emacs installation on Windows. It is
903 now the same as on GNU and Unix systems. In particular, the auxiliary
904 programs, such as cmdproxy.exe and hexl.exe, are in
905 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
906 version), version-independent site-lisp is in share/emacs/site-lisp,
907 version-specific Lisp files are in share/emacs/VERSION/lisp and in
908 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
909 files are in share/emacs/VERSION/etc. (Emacs knows about all these
910 directories and will find the files in there automatically; there's no
911 need to set any variables due to this change.)
914 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
915 The backtrace is written to the 'emacs_backtrace.txt' file in the
916 directory where Emacs was running.
919 ** The variable `buffer-file-type' is no longer supported.
920 Setting it has no effect, and %t in the mode-line format is ignored.
921 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
922 modifying it has no effect.
925 ** Lock files now work on MS-Windows.
926 This allows to avoid losing your edits if the same file is being
927 edited in another Emacs session or by another user. See the node
928 "Interlocking" in the Emacs User Manual for the details. To disable
929 file locking, customize `create-lockfiles' to nil.
931 ** Improved fullscreen support on Mac OS X.
932 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
933 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
934 native is the default.
937 * Installation Changes in Emacs 24.3
939 ** The default X toolkit is now Gtk+ version 3.
940 If you don't pass `--with-x-toolkit' to configure, or if you use
941 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
942 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
943 You can explicitly require a specific version by passing
944 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
946 ** New configure option `--enable-link-time-optimization', to utilize
947 an appropriate feature provided by GCC since version 4.5.0.
949 ** New configure option `--without-all' to disable most of the optional
950 features (image support, etc.) that are normally enabled by default.
952 ** New configure option `--enable-gcc-warnings' (for developing/debugging
953 Emacs). If building with GCC, this enables compile-time checks that
954 warn/give errors about possibly-questionable C code. On a recent GNU
955 system there should be no warnings; on older and on non-GNU systems
956 the results may be useful to developers.
958 ** The configure option `--enable-use-lisp-union-type' has been
959 renamed to `--enable-check-lisp-object-type', as the resulting
960 Lisp_Object type no longer uses a union to implement the compile time
961 check that this option enables.
963 ** The configure option `--disable-maintainer-mode' has been removed,
964 as it was confusingly-named and rarely useful.
966 ** The configure options `--program-prefix', `--program-suffix', and
967 `--program-transform-name' apply to more than just the installed
968 binaries. Now they also affect the man pages, icons, and the
969 etc/emacs.desktop file; but not the info pages, since this would break
970 links between the various manuals.
972 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
973 overwriting "emacs" in the installation bin/ directory with a link
976 ** Emacs uses libtinfo in preference to libncurses, if available.
978 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
979 /usr/pkg/lib to the linker search path. You must add them yourself if
982 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
983 (from the bin and libexec directories, respectively). The former is
984 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
987 * Startup Changes in Emacs 24.3
989 ** Emacs no longer searches for `leim-list.el' files beneath the standard
990 lisp/ directory. There should not be any there anyway. If you have
991 been adding them there, put them somewhere else; e.g., site-lisp.
993 ** The `--no-site-lisp' command line option now works for Nextstep builds.
996 * Changes in Emacs 24.3
1000 *** `C-h f' (`describe-function') can now perform autoloading.
1001 When this command is called for an autoloaded function whose docstring
1002 contains a key substitution construct, that function's library is
1003 automatically loaded, so that the documentation can be shown
1004 correctly. To disable this, set `help-enable-auto-load' to nil.
1006 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1007 even after their associated libraries have been loaded (and the
1008 autoloads have been redefined as functions).
1012 *** Images displayed via ImageMagick now support transparency and the
1013 :background image specification property.
1015 *** When available, ImageMagick support is automatically enabled.
1016 It is no longer necessary to call `imagemagick-register-types'
1017 explicitly to install ImageMagick image types; that function is called
1018 automatically at startup, or when customizing an imagemagick- option.
1020 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1021 ImageMagick to view images. (You must call `imagemagick-register-types'
1022 afterwards if you do not use customize to change this.)
1024 *** The new variable `imagemagick-enabled-types' also affects which
1025 ImageMagick types are treated as images. The function
1026 `imagemagick-filter-types' returns the list of types that will be
1029 *** ImageMagick images now support the :max-width and :max-height
1032 *** Some data types aren't auto-detected by ImageMagick. Adding
1033 :format to `create-image' may help if the content type is in the
1034 new variable `image-format-suffixes'.
1038 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1039 next and previous path separator, respectively.
1041 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1042 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1043 non-nil before enabling the mode.
1047 *** New option `mode-line-default-help-echo' specifies the help text
1048 (shown in a tooltip or in the echo area) for any part of the mode line
1049 that does not have its own specialized help text.
1051 *** You can now click mouse-3 in the coding system indicator to invoke
1052 `set-buffer-file-coding-system'.
1054 ** Server and client
1056 *** emacsclient now obeys string values for `initial-buffer-choice',
1057 if it is told to open a new frame without specifying any file to visit
1058 or expression to evaluate.
1060 *** New option `server-auth-key' specifies a shared server key.
1062 ** Emacs now generates backtraces on fatal errors.
1063 On encountering a fatal error, Emacs now outputs a textual description
1064 of the fatal signal, and a short backtrace on platforms like glibc
1065 that support backtraces.
1067 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1068 This minor mode replaces `toggle-read-only', which is now obsolete.
1070 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1071 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1072 respectively, without exiting from the prompt.
1074 ** In the Package Menu, newly-available packages are listed as "new",
1075 and sorted above the other "available" packages by default.
1077 ** If your Emacs was built from a bzr checkout, the new variable
1078 `emacs-bzr-version' contains information about the bzr revision used.
1080 ** New option `create-lockfiles' specifies usage of lockfiles.
1081 It defaults to t. Changing it to nil inhibits the creation of lock
1082 files (use this with caution).
1084 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1085 variables on remote hosts.
1087 ** The entry for PCL-CVS has been removed from the Tools menu.
1088 The PCL-CVS commands are still available via the keyboard.
1090 ** Using "unibyte: t" in Lisp source files is obsolete.
1091 Use "coding: raw-text" instead.
1093 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1094 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1095 The previous binding, introduced in Emacs 24.1, was a mistake, because
1096 `C-c LETTER' bindings are reserved for user customizations.
1098 ** Internationalization
1100 *** New language environment: Persian.
1102 *** New input method `vietnamese-vni'.
1104 ** Nextstep (GNUstep / Mac OS X) port
1106 *** Support for fullscreen and the frame parameter fullscreen.
1108 *** A file dialog is used for open/save operations initiated from the
1112 * Editing Changes in Emacs 24.3
1114 ** Search and Replace
1116 *** Non-regexp Isearch now performs "lax" space matching.
1117 Each sequence of spaces in the supplied search string may match any
1118 sequence of one or more whitespace characters, as specified by the
1119 variable `search-whitespace-regexp'. (This variable is also used by a
1120 similar existing feature for regexp Isearch.)
1122 *** New Isearch command `M-s SPC' toggles lax space matching.
1123 This applies to both ordinary and regexp Isearch.
1125 *** New option `replace-lax-whitespace'.
1126 If non-nil, `query-replace' uses flexible whitespace matching too.
1129 *** Global `M-s _' starts a symbol (identifier) incremental search,
1130 and `M-s _' in Isearch toggles symbol search mode.
1131 `M-s c' in Isearch toggles search case-sensitivity.
1133 ** Navigation commands
1135 *** New binding `M-g c' for `goto-char'.
1137 *** New binding `M-g TAB' for `move-to-column'.
1139 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1140 interactively with no prefix arg. Previously, it moved to column 1.
1142 ** New option `yank-handled-properties' allows processing of text
1143 properties on yanked text, in ways that are more general than just
1144 removing them (as is done by `yank-excluded-properties').
1146 ** New option `delete-trailing-lines' specifies whether
1147 M-x delete-trailing-whitespace should delete trailing lines at the end
1148 of the buffer. It defaults to t.
1150 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1152 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1153 `ucs-insert' is now an obsolete alias for `insert-char'.
1155 ** The `z' key no longer has a binding in most special modes.
1156 It used to be bound to `kill-this-buffer', but `z' is too easy to
1159 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1160 It copies the region-rectangle as the last rectangle kill.
1164 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1166 *** New option `register-separator' specifies the register containing
1167 the text to put between collected texts for use with
1168 M-x append-to-register and M-x prepend-to-register.
1171 * Changes in Specialized Modes and Packages in Emacs 24.3
1173 ** Common Lisp emulation (CL)
1175 *** CL's main entry is now (require 'cl-lib).
1176 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1177 i.e., all its definitions have the "cl-" prefix (and internal definitions
1178 use the "cl--" prefix).
1180 If `cl' provided a feature under the name `foo', then `cl-lib'
1181 provides it under the name `cl-foo' instead; with the exceptions of the
1182 few `cl' definitions that had to use `foo*' to avoid conflicts with
1183 pre-existing Elisp entities. These have been renamed to `cl-foo'
1184 rather than `cl-foo*'.
1186 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1187 provide the old, non-prefixed names. Some exceptions are listed below:
1189 *** `cl-flet' is not like `flet' (which is deprecated).
1190 Instead it obeys the behavior of Common-Lisp's `flet'.
1191 In particular, in cl-flet function definitions are lexically scoped,
1192 whereas in flet the scoping is dynamic.
1194 *** `cl-labels' is slightly different from `labels'.
1195 The difference is that it relies on the `lexical-binding' machinery
1196 (as opposed to the `lexical-let' machinery used previously) to capture
1197 definitions in closures, so such closures will only work if `lexical-binding'
1200 *** `cl-letf' is not exactly like `letf'.
1201 The only difference is in details that relate to some deprecated usage
1202 of `symbol-function' in place forms.
1204 *** `progv' was rewritten to use the `let' machinery.
1205 A side effect is that variables without corresponding values are bound
1206 to nil rather than being made unbound.
1208 *** The following methods of extending `setf' are obsolete
1209 (use features from gv.el instead):
1210 `define-modify-macro' (use `gv-letplace')
1211 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1212 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1213 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1217 *** Changes are now highlighted using the same color scheme as in
1218 modern VCSes. Deletions are displayed in red (new faces
1219 `diff-refine-removed' and `smerge-refined-removed', and new definition
1220 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1221 and `smerge-refined-added', and new definition of `diff-added').
1223 *** The variable `diff-use-changed-face' defines whether to use the
1224 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1225 changes in context diffs.
1227 *** The new command `diff-delete-trailing-whitespace' removes trailing
1228 whitespace introduced by a diff.
1230 ** Ediff now uses the same color scheme as Diff mode.
1234 A new version of python.el, which provides several new features, including:
1235 per-buffer shells, better indentation, Python 3 support, and improved
1236 shell-interaction compatible with iPython (and virtually any other
1239 *** Some user options have been replaced/renamed, including (old -> new):
1240 **** python-indent -> python-indent-offset
1241 **** python-guess-indent -> python-indent-guess-indent-offset
1242 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1243 **** python-use-skeletons -> python-skeleton-autoinsert
1245 *** Some user options have been removed, including:
1247 **** `python-indent-string-contents': Strings are never indented.
1249 **** `python-honour-comment-indentation':
1250 Comments are always considered as indentation markers.
1252 **** `python-continuation-offset': Indentation is automatically
1253 calculated in a pep8 compliant way depending on the context.
1255 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1256 Have no direct mapping as the shell interaction is completely different.
1258 **** `python-python-command', `python-jython-command':
1259 Replaced by `python-shell-interpreter'.
1261 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1262 `python-pdbtrack-minor-mode-string', `python-source-modes':
1265 *** Some commands have been replaced (old -> new):
1266 **** python-insert-class -> python-skeleton-class
1267 **** python-insert-def -> python-skeleton-def
1268 **** python-insert-for -> python-skeleton-for
1269 **** python-insert-if -> python-skeleton-if
1270 **** python-insert-try/except -> python-skeleton-try
1271 **** python-insert-try/finally -> python-skeleton-try
1272 **** python-insert-while -> python-skeleton-while
1273 **** python-find-function -> python-nav-jump-to-defun
1274 **** python-next-statement -> python-nav-forward-sentence
1275 **** python-previous-statement -> python-nav-backward-sentence
1276 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1277 **** python-end-of-defun-function -> python-nav-end-of-defun
1278 **** python-send-buffer -> python-shell-send-buffer
1279 **** python-send-defun -> python-shell-send-defun
1280 **** python-send-region -> python-shell-send-region
1281 **** python-send-region-and-go -> emulate with python-shell-send-region
1282 and python-shell-switch-to-shell
1283 **** python-send-string -> python-shell-send-string
1284 **** python-switch-to-python -> python-shell-switch-to-shell
1285 **** python-describe-symbol -> python-eldoc-at-point
1289 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1291 *** The D-Bus object manager interface is implemented.
1293 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1294 if their value does not fit into Emacs's integer range.
1296 *** The function `dbus-call-method' is now non-blocking.
1297 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1299 *** Signals can also be sent as unicast messages.
1301 *** The argument list of `dbus-register-signal' has been extended,
1302 according to the new match rule types of D-Bus.
1304 *** `dbus-init-bus' supports private connections.
1306 *** There is a new function `dbus-setenv'.
1308 ** `desktop-path' no longer includes the "." directory.
1309 Desktop files are now located in ~/.emacs.d by default.
1313 *** `dired-do-async-shell-command' executes each file sequentially
1314 if the command ends in `;' (when operating on multiple files).
1315 Otherwise, it executes the command on each file in parallel.
1317 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1318 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1321 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1322 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1323 mark/unmark/flag all files in the active region.
1325 *** The minibuffer default for `=' (`dired-diff') has changed.
1326 It is now the backup file for the file at point, if one exists.
1327 In Transient Mark mode the default is the file at the active mark.
1329 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1330 The global binding for `M-=', `count-words-region' is in effect.
1334 *** New module "notifications", which can send a notification when you
1335 receive a private message or your nickname is mentioned.
1337 *** ERC will look up server/channel names via auth-source and use any
1340 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1341 only applies to messages sent by lurkers.
1343 ** reStructuredText mode
1345 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1346 fontification, comment handling, and customization have all been revised
1349 *** Support for `imenu' and `which-function-mode'.
1351 *** The reStructuredText syntax is more closely covered.
1352 Sphinx support has been improved.
1354 *** `rst-insert-list' inserts new list or continues existing lists.
1356 *** A negative prefix argument always works for `rst-adjust'.
1358 *** The window configuration is reset after displaying a TOC.
1360 *** The constant `rst-version' describes the rst.el package version.
1364 *** Support for percent literals and recognition of regular expressions
1365 in method calls without parentheses with more methods, including Cucumber
1368 *** Improved syntax highlighting and indentation.
1370 *** New command `ruby-toggle-block', bound to `C-c {'.
1372 *** Some non-standard keybindings/commands have been removed:
1374 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1376 **** `ruby-mark-defun'; use `mark-defun'.
1378 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1379 appropriate settings for the variables `beginning-of-defun-function'
1380 and `end-of-defun-function'.
1382 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1383 `reindent-then-newline-and-indent' and `newline' have been removed.
1385 ** Shell Script mode
1387 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1389 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1391 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1395 *** The free software compiler GHDL is supported (and now the default).
1397 *** Support for the VHDL-AMS packages has been added/updated.
1399 *** Updated to the 2002 revision of the VHDL standard.
1401 *** Accepts \r and \f as whitespace.
1405 *** The faces used by Apropos are now directly customizable.
1406 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1407 see the `apropos' Custom group for details.
1409 *** The old options whose values specified faces to use have been removed
1410 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1414 *** This package has been rewritten to use Tabulated List mode.
1416 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1417 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1421 *** Algebraic simplification mode is now the default.
1422 To restrict to the limited simplifications given by the former
1423 default simplification mode, use `m I'.
1427 *** You can customize the header text that appears above each calendar month.
1428 See the variable `calendar-month-header'.
1430 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1432 *** The calendars produced by cal-html include holidays.
1433 Customize `cal-html-holidays' to change this.
1437 *** The major modes from the parser generators "Bovine" and "Wisent"
1438 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1439 are in `auto-mode-alist', and the corresponding manuals are included.
1443 **** Menu support for the "Configuration" feature. This allows users to
1444 choose the active configuration (such as debug or install) from the menu.
1446 **** New command `ede-set' to interactively set project-local variables.
1448 **** Support for compiling, debugging, and running in "generic" projects.
1450 **** Autoconf editing support for M4 macros with complex arguments.
1452 **** Compilation support for the "linux" project type.
1454 **** "simple" projects have been removed; use "generic" projects instead.
1458 **** Support for parsing #include statements inside a namespace in C/C++.
1460 **** Improved support for 'extern "C"' declarations in C/C++.
1462 **** The ability to ignore more common special C/C++ preprocessor symbols,
1463 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1464 If available, include cdefs.h as an additional source of preprocessor symbols.
1466 **** Improved C/C++ function pointer parsing.
1468 **** In Python, support for converting imports to include file names.
1470 **** Ability to dynamically determine the Python load path.
1472 **** Support for the Python 'WITH' and 'AT' keywords.
1474 **** Improved tooltip completion.
1478 **** The SRecode manual is now included.
1480 **** Tag generation supports constructor/destructor settings and system
1481 include differentiation.
1483 **** Addition of 'Framework' support: Frameworks are specified when a
1484 particular kind of library (such as Android) is needed in a common language
1487 **** Support for nested templates and let variables override based on priority.
1489 **** Support for merging tables from multiple related modes, such as
1490 default -> c++ -> arduino.
1492 ** Compile has a new option `compilation-always-kill'.
1496 *** `custom-reset-button-menu' now defaults to t.
1498 *** Non-option variables are never matched in `customize-apropos' and
1499 `customize-apropos-options' (i.e., the prefix argument does nothing for
1500 these commands now).
1504 *** The variables `term-default-fg-color' and `term-default-bg-color'
1505 are now deprecated in favor of the customizable face `term'.
1507 *** You can customize how to display ANSI terminal colors and styles
1508 by customizing the corresponding `term-color-<COLOR>',
1509 `term-color-underline' and `term-color-bold' faces.
1513 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1515 *** Remote processes are now also supported on remote MS-Windows hosts.
1519 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1520 Previously, this slot stored semicolon-separated attribute-value pairs
1521 appended to some imap URLs, but this is not compatible with RFC 3986.
1522 So now the `filename' slot stores the entire path and query components,
1523 and the `attributes' slot is always nil.
1525 *** New function `url-encode-url' for encoding a URI string.
1526 The `url-retrieve' function now uses this to encode its URL argument,
1527 in case that is not properly encoded.
1529 *** New command `url-cookie-list' displays all the current cookies, and
1530 allows deleting selected cookies.
1532 ** notifications.el supports now version 1.2 of the Notifications API.
1533 The function `notifications-get-capabilities' returns the supported
1536 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1537 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1538 `flymake-warning-bitmap'.
1540 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1541 specifying URL types that should be converted to remote file names at
1542 the FFAP prompt. The default is now '("ftp").
1544 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1545 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1547 ** New option `mouse-avoidance-banish-position' specifies where the
1548 `banish' mouse avoidance setting moves the mouse.
1550 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1551 closing brackets to be aligned with the line of the opening bracket.
1553 ** In Proced mode, new command `proced-renice' renices marked processes.
1555 ** New option `async-shell-command-buffer' specifies the buffer to use
1556 for a new asynchronous `shell-command' when the default output buffer
1557 `*Async Shell Command*' is already in use.
1559 ** SQL mode has a new option `sql-db2-escape-newlines'.
1560 If non-nil, newlines sent to the command interpreter will be escaped
1561 by a backslash. The default does not escape the newlines and assumes
1562 that the sql statement will be terminated by a semicolon.
1564 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1565 (and modes that derive from it), sorts the column at point, or the Nth
1566 column if a numeric prefix argument is given.
1568 ** `which-func-modes' now defaults to t, so Which Function mode, when
1569 enabled, applies to all applicable major modes.
1571 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1574 ** Follow mode no longer works by using advice.
1575 The option `follow-intercept-processes' has been removed.
1577 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1579 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1580 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1581 *** semantic-change-hooks -> semantic-change-functions
1582 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1583 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1584 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1585 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1586 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1587 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1588 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1589 *** rcirc-activity-hooks -> rcirc-activity-functions
1590 *** rcirc-print-hooks -> rcirc-print-functions
1591 *** dbus-event-error-hooks -> dbus-event-error-functions
1592 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1593 *** checkdoc-style-hooks -> checkdoc-style-functions
1594 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1595 *** archive-extract-hooks -> archive-extract-hook
1596 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1597 *** hfy-post-html-hooks -> hfy-post-html-hook
1598 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1599 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1600 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1601 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1603 ** Obsolete packages
1606 In most cases, assoc+member+push+delq work just as well.
1607 And in any case it's just a terrible package: ugly semantics, terrible
1608 inefficiency, and not namespace-clean.
1617 * Incompatible Lisp Changes in Emacs 24.3
1619 ** Docstrings starting with `*' no longer indicate user options.
1620 Only variables defined using `defcustom' are considered user options.
1621 The function `user-variable-p' is now an obsolete alias for
1622 `custom-variable-p'.
1624 ** The return values of `defalias', `defun' and `defmacro' have changed,
1625 and are now undefined. For backwards compatibility, `defun' and
1626 `defmacro' currently return the name of the newly defined
1627 function/macro, but this should not be relied upon.
1629 ** `random' by default now returns a different random sequence in
1630 every Emacs run. Use `(random S)', where S is a string, to set the
1631 random seed to a value based on S, in order to get a repeatable
1632 sequence in later calls.
1634 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1635 that substring is inserted literally even if the LITERAL arg is
1636 non-nil, instead of causing an error to be signaled.
1638 ** `select-window' now always makes the window's buffer current.
1639 It does so even if the window was selected before.
1641 ** The function `x-select-font' can return a font spec, instead of a
1642 font name as a string. Whether it returns a font spec or a font name
1643 depends on the graphical library.
1645 ** `face-spec-set' no longer sets frame-specific attributes when the
1646 third argument is a frame (that usage was obsolete since Emacs 22.2).
1648 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1650 ** The CL package's `get-setf-method' function no longer exists.
1651 Generalized variables are now part of core Emacs Lisp, and implemented
1652 differently to the way cl.el used to do it. It is not possible to
1653 define a compatible replacement for `get-setf-method'. See the file
1654 gv.el for internal details of the new implementation.
1656 ** The arguments of `dbus-register-signal' are no longer just strings,
1657 but keywords or keyword-string pairs. The old argument list will
1658 still be supported for Emacs 24.x.
1660 ** Miscellaneous name changes
1661 Some Lisp symbols have been renamed to correct their spelling,
1662 or to be more consistent with standard Emacs terminology.
1664 *** Renamed functions
1665 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1666 **** inactivate-input-method -> deactivate-input-method
1667 **** quail-inactivate -> quail-deactivate
1668 **** robin-inactivate -> robin-deactivate
1669 **** viper-inactivate-input-method -> viper-deactivate-input-method
1670 **** viper-inactivate-input-method-action ->
1671 viper-deactivate-input-method-action
1672 **** ucs-input-inactivate -> ucs-input-deactivate
1675 The old hooks are still supported for backward compatibility, but they
1676 are deprecated and will be removed eventually.
1677 **** input-method-inactivate-hook -> input-method-deactivate-hook
1678 **** robin-inactivate-hook -> robin-deactivate-hook
1679 **** quail-inactivate-hook -> quail-deactivate-hook
1681 *** Renamed variables
1682 **** follow-deactive-menu -> follow-inactive-menu
1683 **** inactivate-current-input-method-function ->
1684 deactivate-current-input-method-function
1686 ** Some obsolete functions, variables, and faces have been removed:
1687 *** `last-input-char', `last-command-char', `unread-command-char'
1688 *** `facemenu-unlisted-faces'
1689 *** `rmail-decode-mime-charset'
1690 *** `iswitchb-read-buffer'
1691 *** `sc-version', `sc-submit-bug-report'
1692 *** `set-char-table-default'
1693 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1694 *** `compile-internal'
1696 *** `mode-line-inverse-video'
1697 *** `follow-mode-off-hook'
1698 *** `cvs-commit-buffer-require-final-newline'
1699 (use `log-edit-require-final-newline' instead)
1700 *** `cvs-changelog-full-paragraphs'
1701 (use `log-edit-changelog-full-paragraphs' instead)
1702 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1703 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1704 *** `vc-master-templates' (use `vc-handled-backends' instead)
1705 *** `vc-checkout-carefully'
1708 * Lisp Changes in Emacs 24.3
1710 ** CL-style generalized variables are now in core Elisp.
1711 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1712 You can define your own generalized variables using `gv-define-simple-setter',
1713 `gv-define-setter', etc.
1715 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1716 This can significantly speed up execution of non-byte-compiled code,
1717 but can also bump into previously unnoticed cyclic dependencies.
1718 These are generally harmless: they will simply cause the macro calls
1719 to be left for later expansion (as before), but will result in a
1720 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1721 You may wish to restructure your code so this does not happen.
1723 ** New sampling-based Elisp profiler.
1724 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1725 When finished, use M-x profiler-stop. The sampling rate can be based on
1726 CPU time or memory allocations.
1728 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1729 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1731 ** New macros `setq-local' and `defvar-local'.
1733 ** Face underlining can now use a wave.
1735 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1736 of `read-regexp' accepts a string ending with a colon and space, and its
1737 second argument DEFAULTS can be a list of strings accessible via `M-n'
1738 in the minibuffer ahead of other hard-coded useful regexp-related values.
1739 More commands use `read-regexp' now to read their regexp arguments.
1743 *** New function `completion-table-with-quoting' to handle completion
1744 in the presence of quoting, such as file completion in shell buffers.
1746 *** New function `completion-table-subvert' to use an existing completion
1747 table, but with a different prefix.
1751 *** New error type and new function `user-error'.
1752 These do not trigger the debugger.
1754 *** New option `debugger-bury-or-kill', saying what to do with the
1755 debugger buffer when exiting debug.
1757 *** Set `debug-on-message' to enter the debugger when a certain
1758 message is displayed in the echo area. This can be useful when trying
1759 to work out which code is doing something.
1761 *** New var `inhibit-debugger', automatically set to prevent accidental
1762 recursive invocations.
1766 *** New command `fit-frame-to-buffer' adjusts the frame height to
1769 *** The command `fit-window-to-buffer' can adjust the frame height
1770 if the new option `fit-frame-to-buffer' is non-nil.
1772 *** New macro `with-temp-buffer-window', similar to
1773 `with-output-to-temp-buffer'.
1775 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1778 *** New option `switch-to-buffer-preserve-window-point' to restore a
1779 window's point when switching buffers.
1781 *** New display action alist entries `window-height' and `window-width'
1782 specify the size of new windows created by `display-buffer'.
1784 *** New display action alist entry `pop-up-frame-parameters', if
1785 non-nil, specifies frame parameters to give any newly-created frame.
1787 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1788 tells display action functions to avoid changing which frame is
1791 *** New display action alist entry `previous-window', if non-nil,
1792 specifies window to reuse in `display-buffer-in-previous-window'.
1794 *** New display action functions `display-buffer-below-selected',
1795 and `display-buffer-in-previous-window'.
1797 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1798 now accept a third argument to avoid choosing the selected window.
1800 *** Additional values recognized for option `window-combination-limit'.
1802 *** The following variables are obsolete, as they can be replaced by
1803 appropriate entries in the `display-buffer-alist' function introduced
1805 **** `dired-shrink-to-fit'
1806 **** `display-buffer-reuse-frames'
1807 **** `display-buffer-function'
1808 **** `special-display-buffer-names'
1809 **** `special-display-frame-alist'
1810 **** `special-display-function'
1811 **** `special-display-regexps'
1815 *** `current-time-string' no longer requires that its argument's year
1816 must be in the range 1000..9999. It now works with any year supported
1817 by the underlying C implementation.
1819 *** `current-time' now returns extended-format time stamps
1820 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1821 PSEC is typically a multiple of 1000 on current machines. Other
1822 functions that use this format, such as `file-attributes' and
1823 `format-time-string', have been changed accordingly. Old-format time
1824 stamps are still accepted.
1826 *** The format of timers in `timer-list' and `timer-idle-list' is now
1827 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1828 The PSECS slot is new, and uses picosecond resolution. It can be
1829 accessed via the new `timer--psecs' accessor.
1831 *** Last-modified time stamps in undo lists now are of the form
1832 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1836 *** Improved security when handling persistent objects:
1838 **** `eieio-persistent-read' now features optional arguments for specifying
1839 the class to load, as well as a flag stating whether subclasses are allowed;
1840 if provided, other classes will be rejected by the reader. For
1841 compatibility with existing code, if the class is omitted only a
1844 **** New specialized reader for pulling in classes and signaling errors
1845 without evaluation of suspicious code.
1847 **** All slots that contain objects must have a :type. Slots with lists
1848 of objects must use a new type predicate for a list of an object type.
1850 *** Support for `find-function' and similar utilities, through the addition
1851 of filename support to generated symbols.
1853 ** Floating point functions now always return special values like NaN,
1854 instead of signaling errors, if given invalid args; e.g., (log -1.0).
1855 Previously, they returned NaNs on some platforms but signaled errors
1856 on others. The affected functions are acos, asin, tan, exp, expt,
1857 log, log10, sqrt, and mod.
1859 ** New fringe bitmap `exclamation-mark'.
1861 ** Miscellaneous changes to special forms and macros
1863 *** `defun' and `defmacro' are now macros rather than special forms.
1865 *** `kbd' is now a function rather than a macro.
1867 ** Miscellaneous new functions
1869 *** `set-temporary-overlay-map' sets up a temporary keymap that
1870 takes precedence over most other maps for a short while (normally one key).
1872 *** `autoloadp' tests if its argument is an autoloaded object.
1874 *** `autoload-do-load' performs the autoloading operation.
1876 *** `buffer-narrowed-p' tests if the buffer is narrowed.
1878 *** `file-name-base' returns a file name sans directory and extension.
1880 *** `function-get' fetches a function property, following aliases.
1882 *** `posnp' tests if an object is a `posn'.
1884 *** `system-users' returns the user names on the system.
1886 *** `system-groups' returns the group names on the system.
1888 *** `tty-top-frame' returns the topmost frame of a text terminal.
1890 ** The following functions and variables are obsolete:
1891 *** `automount-dir-prefix' (use `directory-abbrev-alist')
1892 *** `buffer-has-markers-at'
1893 *** `macro-declaration-function' (use `macro-declarations-alist')
1894 *** `window-system-version' (provides no useful information)
1895 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
1896 *** `query-replace-interactive'
1897 *** `font-list-limit' (has had no effect since Emacs < 23)
1900 * Changes in Emacs 24.3 on Non-Free Operating Systems
1902 ** Cygwin builds can use the native MS Windows user interface.
1903 Pass `--with-w32' to configure. The default remains the X11 interface.
1905 ** Two new functions are available in Cygwin builds:
1906 `cygwin-convert-file-name-from-windows' and
1907 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
1908 code to access the Cygwin file-name mapping machinery to convert
1909 between Cygwin and Windows-native file and directory names.
1911 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
1912 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
1913 `mouse-autoselect-window'.
1915 ** On MS Windows Vista and later Emacs now supports symbolic links.
1917 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
1918 support for libxml2, even if its presence is detected.
1920 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1922 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
1923 directories to the search path. You must add them yourself if you want them.
1926 * Changes in Emacs 24.2
1928 ** This is mainly a bug-fix release.
1931 * Installation Changes in Emacs 24.1
1933 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1934 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1935 also depend on Gtk+. You can disable them with --without-rsvg and
1938 ** Emacs can be compiled with GnuTLS support.
1939 This happens by default if a suitably recent version of the library is
1940 found at build time. To prevent this, use the configure option
1941 `--without-gnutls'. See below for GnuTLS features.
1943 ** Emacs can be compiled with SELinux support.
1944 This happens by default if a suitably recent version of the library is
1945 found at build time. To prevent this, use the configure option
1946 `--without-selinux'. See below for SELinux features.
1948 ** Emacs can be compiled with ImageMagick support.
1949 This happens by default if a suitably recent version of the library is
1950 found at build time. To prevent this, use the configure option
1951 `--without-imagemagick'. See below for ImageMagick features.
1952 This feature is not available for the Nextstep or MS ports.
1954 ** Emacs can be compiled with libxml2 support.
1955 This happens by default if a suitably recent version of the library is
1956 found at build time. To prevent this, use the configure option
1957 `--without-xml2'. See below for libxml2 features.
1959 ** By default, the installed Info and man pages are compressed.
1960 You can disable this by configuring --without-compress-info.
1962 ** New configure option --with-wide-int.
1963 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
1964 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1967 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
1968 These provide no new functionality, they just remove the need to edit
1969 lib-src/Makefile by hand in order to use the associated features.
1971 ** New configure option --enable-use-lisp-union-type.
1972 This is only useful for Emacs developers to debug certain types of bugs.
1973 This is not a new feature; only the configure flag is new.
1975 ** The standalone programs digest-doc and sorted-doc are removed.
1976 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1978 ** The standalone program `fakemail' is removed.
1979 If you need it, feedmail.el provides a superset of the functionality.
1982 * Startup Changes in Emacs 24.1
1984 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1985 command line arguments, and the EMACS_UNIBYTE environment variable, no
1986 longer have any effect. (They were declared obsolete in Emacs 23.)
1988 ** New command line option `--no-site-lisp' removes site-lisp directories
1989 from load-path. -Q now implies this. This option does not affect the
1990 EMACSLOADPATH environment variable (and hence has no effect for
1994 * Changes in Emacs 24.1
1998 *** Many packages now use the `completion-at-point' command,
1999 rather than implementing separate completion commands.
2001 *** `completion-at-point' now handles tags and semantic completion.
2003 *** Completion in a non-minibuffer now tries to detect the end of completion
2004 and pops down the *Completions* buffer accordingly.
2006 *** New option `completion-cycle-threshold' allows completion cycling.
2008 *** New option `completion-category-overrides' for overriding the
2009 default completion style in certain circumstances.
2011 *** New completion style `substring'.
2013 *** Completion of buffer names uses `substring' completion by default.
2015 *** The option `widget-complete-field' has been removed.
2019 *** The first time you try sending mail, Emacs asks for a mail method.
2020 This is implemented by a new default for `send-mail-function', which
2021 is `sendmail-query-once'. This offers to use the smtpmail package, or
2022 to use the old defaults relying on external mail facilities
2023 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2024 `mailclient-send-it' on Windows).
2026 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2027 transfers the report to your desktop's preferred mail client, if there
2028 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2031 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2032 and Mail mode changes
2034 ** Emacs server and client changes
2036 *** New option `server-port' specifies the port for TCP Emacs servers.
2038 *** New emacsclient argument -q/--quiet suppresses some status messages.
2040 *** New emacsclient argument --frame-parameters specifies the frame
2041 parameters of any newly-created graphical frame.
2043 *** If emacsclient shuts down due to Emacs signaling an error,
2044 its exit status is 1.
2046 *** New emacsclient argument --parent-id ID.
2047 This opens a client frame in parent X window ID, via XEmbed, similar
2048 to the --parent-id argument to Emacs.
2050 ** Internationalization changes
2052 *** Emacs now supports display and editing of bidirectional text.
2053 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2054 displayed in the correct visual order as expected by users of those
2055 scripts. The display reordering is a "full bidirectionality" class
2056 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2057 with no RTL text should look exactly the same as before.
2059 **** New buffer-local variable `bidi-display-reordering'.
2060 To disable display reordering in a buffer, change this to nil.
2062 **** New buffer-local variable `bidi-paragraph-direction'.
2063 If nil (the default), Emacs determines the base direction of each
2064 paragraph from its text, as specified by the UBA. Setting the value
2065 to `right-to-left' or `left-to-right' forces a base direction on each
2068 Paragraphs with right-to-left base direction are displayed starting at
2069 the right window edge.
2071 *** Enhanced support for characters with no glyphs in available fonts,
2072 or, on text terminals, characters that cannot be encoded by the
2073 terminal coding system. The new option `glyphless-char-display-control'
2074 specifies how to display them: as a hexadecimal code in a box, a thin
2075 1-pixel space, an empty box, etc.
2077 *** New input methods for Farsi and Bulgarian
2078 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2080 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2081 (U+2010 and U+2011).
2083 *** New Hebrew translation of the Emacs Tutorial.
2084 Type `C-u C-h t' to choose it in case your language setup doesn't
2085 automatically select it.
2087 ** An Emacs Lisp package manager is now included.
2088 This is a convenient way to download and install additional packages,
2089 from a package repository at http://elpa.gnu.org.
2091 *** M-x list-packages shows a list of packages, which can be
2092 selected for installation.
2094 *** New command `describe-package', bound to `C-h P'.
2096 *** By default, all installed packages are loaded automatically when
2097 Emacs starts up. To disable this, set `package-enable-at-startup' to
2098 nil. To specify the packages to load, customize `package-load-list'.
2100 ** Custom theme changes
2102 *** New command `M-x customize-themes', which provides a convenient
2103 interface for enabling and disabling Custom themes.
2105 *** New option `custom-theme-load-path' is the load path for themes.
2106 Emacs no longer looks for Custom themes in `load-path'. The default
2107 value of `custom-theme-load-path' says to look for themes in
2108 `custom-theme-directory', followed by a subdirectory of
2109 `data-directory' named "themes/", which contains a small selection of
2110 built-in Custom themes.
2112 *** New option `custom-safe-themes' records known-safe theme files.
2113 If a theme is not in this list, Emacs queries before loading it, and
2114 offers to save the theme to `custom-safe-themes' automatically. By
2115 default, all themes included in Emacs are treated as safe.
2117 ** Improved GTK integration
2119 *** GTK scroll-bars are now placed on the right by default.
2120 The function `set-scroll-bar-mode' can change this.
2122 *** GTK tool bars can have just text, just images or images and text.
2123 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2124 the default is taken from desktop settings.
2126 *** GTK tool bars can be placed on any edge of the frame.
2127 The frame-parameter tool-bar-position controls this. It takes the
2128 values top, left, right or bottom. The Options => Show/Hide menu has
2131 *** The default colors for selected text (the `region' face) are taken
2132 from the GTK theme when Emacs is built with GTK.
2134 *** Emacs uses GTK tooltips by default if built with GTK.
2135 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2137 ** Graphical interface changes
2139 *** On graphical displays, the mode-line no longer ends in dashes.
2140 Also, the first dash (which does not indicate anything) is just
2141 displayed as a space.
2143 *** `menu-bar-select-buffer-function' lets you choose another operation
2144 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2146 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2147 built with Xft. These fonts can be set via X resources, for example:
2148 Emacs.pane.menubar.font: Courier-12
2152 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2153 or if it receives a SIGINT signal in batch mode.
2155 *** `kill-emacs-hook' is now also run in batch mode.
2156 Third-party code which adds to `kill-emacs-hook' should check if they
2157 do the right thing in batch mode.
2159 ** Scrolling changes
2161 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2162 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2163 of buffer at first key-press (instead they move to top/bottom of buffer)
2164 when `scroll-error-top-bottom' is non-nil.
2166 *** New option `scroll-error-top-bottom' (see above).
2168 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2169 scroll a line instead of full screen.
2171 *** New property `scroll-command' should be set on a command's symbol to
2172 define it as a scroll command affected by `scroll-preserve-screen-position'.
2174 *** If you customize `scroll-conservatively' to a value greater than 100,
2175 Emacs will never recenter point in the window when it scrolls due to
2176 cursor motion commands or commands that move point (e.f., `M-g M-g').
2177 Previously, you needed to use `most-positive-fixnum' as the value of
2178 `scroll-conservatively' to achieve the same effect.
2180 *** "Aggressive" scrolling now honors the scroll margins.
2181 If you customize `scroll-up-aggressively' or
2182 `scroll-down-aggressively' and move point off the window, Emacs now
2183 scrolls the window so as to avoid positioning point inside the scroll
2186 ** Basic SELinux support has been added.
2187 This requires Emacs to be linked with libselinux at build time.
2189 *** Emacs preserves the SELinux file context when backing up.
2190 Also, the function `copy-file' has an extra optional argument for
2191 preserving SELinux context, and the return value of `backup-buffer'
2192 now includes the SELinux context.
2194 *** New functions `file-selinux-context' and `set-file-selinux-context'
2195 get and set the SELinux context of a file.
2199 *** `delete-by-moving-to-trash' now only affects commands that specify
2200 trashing. This avoids inadvertently trashing temporary files.
2202 *** Calling `delete-file' or `delete-directory' with a prefix argument
2203 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2205 ** File- and directory-local variable changes
2207 *** You can stop directory local vars from applying to subdirectories.
2208 Add an element (subdirs . nil) to the alist portion of any variables
2209 settings to indicate that the section should not apply to
2212 *** Directory local variables can apply to some file-less buffers.
2213 Affected modes include dired, vc-dir, and log-edit. For example,
2214 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2215 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2216 `hack-dir-local-variables-non-file-buffer' to support this.
2218 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2219 Instead, use "eval: (minor-mode 1)".
2221 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2222 to `inhibit-local-variables-regexps'. As the name suggests, it now
2223 applies to ALL file local variables, not just -*- lines. The
2224 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2229 *** The `quit-window' command now restores the last buffer displayed
2230 in the quitted window.
2232 *** Resizing an Emacs frame now preserves proportional window sizes,
2233 modulo restrictions like window minimum sizes and fixed-size windows.
2235 *** The behavior of `display-buffer' is now customizable in detail.
2237 **** New option `display-buffer-base-action' specifies a list of
2238 user-determined display "actions" (functions and optional arguments
2239 for choosing the displaying window).
2241 This takes precedence over the default display action, which is
2242 specified by `display-buffer-fallback-action'.
2244 **** New option `display-buffer-alist' maps buffer name regexps to
2245 display actions, taking precedence over `display-buffer-base-action'.
2247 *** New option `window-combination-limit'.
2248 The new option `window-combination-limit' allows to return the space
2249 obtained for resizing or creating a window more reliably to the window
2250 from which such space was obtained.
2252 *** New option `window-combination-resize'.
2253 The new option `window-combination-resize' allows to split a window that
2254 otherwise cannot be split because it's too small by stealing space from
2255 other windows in the same combination. Subsequent resizing or deletion
2256 of the window will resize all windows in the same combination as well.
2258 *** New option `frame-auto-hide-function' lets you choose between
2259 iconifying or deleting a frame when burying a buffer in a dedicated
2260 frame, or quitting a window showing a buffer in a frame of its own.
2262 *** New commands `maximize-window' and `minimize-window'.
2263 These maximize and minimize the size of a window within its frame.
2265 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2266 These functions allow to navigate through the live buffers that have
2267 been shown in a specific window.
2269 ** Minibuffer changes
2271 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2272 This is handy for minibuffer-only frames, and is also used for the feature
2273 where mouse-1 pops up *Messages*"', which can now easily be changed.
2275 *** Minibuffers set `truncate-lines' to nil.
2276 If you want to change the value to something else, you could use
2277 for example `minibuffer-setup-hook'.
2279 ** `auto-mode-case-fold' is now enabled by default.
2281 ** `backup-by-copying-when-mismatch' now defaults to t.
2283 ** New basic faces `error', `warning', `success'.
2284 These are used to highlight text indicating failure, caution or
2285 successful operation.
2287 ** New option `list-colors-sort' defines the color sort order
2288 for `list-colors-display'.
2290 ** The variable `focus-follows-mouse' now always defaults to nil.
2293 * Editing Changes in Emacs 24.1
2297 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2298 `isearch-yank-line'.
2300 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2301 `isearch-yank-kill'.
2303 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2305 ** New commands `count-words-region' and `count-words'.
2307 *** M-= is bound to `count-words-region', not `count-lines-region'.
2308 The `count-words-region' command, when called interactively, reports
2309 the number of lines, words, and characters in the region. It is a
2310 superset of the old `count-lines-region', which is now an obsolete
2313 ** The command `just-one-space' (M-SPC), if given a negative argument,
2314 also deletes newlines around point.
2318 *** New option `delete-active-region'.
2319 If non-nil, [delete] and DEL delete the region if it is active and no
2320 prefix argument is given. If set to `kill', those commands kill
2323 *** New command `delete-forward-char', bound to [delete].
2324 This is meant for interactive use, and obeys `delete-active-region'.
2325 The command `delete-char' does not obey `delete-active-region'.
2327 *** `delete-backward-char' is now a Lisp function.
2328 Apart from obeying `delete-active-region', its behavior is unchanged.
2329 However, the byte compiler now warns if it is called from Lisp; Lisp
2330 callers should use delete-char with a negative argument instead.
2332 *** The option `mouse-region-delete-keys' has been deleted.
2334 ** Selection changes.
2336 The default handling of clipboard and primary selections has been
2337 changed to conform with modern X applications. In short, most
2338 commands for killing and yanking text now use the clipboard, while
2339 mouse commands use the primary selection.
2341 In the following, we provide a list of these changes, followed by a
2342 list of steps to get the old behavior back if you prefer that.
2344 *** `select-active-regions' now defaults to t.
2345 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2346 the kill ring. The selected text is put in the primary selection, if
2347 the system possesses a separate primary selection facility (e.g. X).
2349 **** `select-active-regions' also accepts a new value, `only'.
2350 This means to only set the primary selection for temporarily active
2351 regions (usually made by mouse-dragging or shift-selection);
2352 "ordinary" active regions, such as those made with C-SPC followed by
2353 point motion, do not alter the primary selection.
2355 **** `mouse-drag-copy-region' now defaults to nil.
2357 *** mouse-2 is now bound to `mouse-yank-primary'.
2358 This pastes from the primary selection, ignoring the kill-ring.
2359 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2361 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2363 *** `x-select-enable-primary' now defaults to nil.
2364 Thus, commands that kill text or copy it to the kill-ring (such as
2365 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2367 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2368 exactly equivalent to M-w, C-w, and C-y respectively.
2370 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2371 non-nil by default, as Windows does not support the primary selection
2372 between applications.
2374 *** To return to the previous behavior, do the following:
2376 **** Change `select-active-regions' to nil.
2377 **** Change `mouse-drag-copy-region' to t.
2378 **** Change `x-select-enable-primary' to t (on X only).
2379 **** Change `x-select-enable-clipboard' to nil.
2380 **** Bind `mouse-yank-at-click' to mouse-2.
2382 *** Support for X cut buffers has been removed.
2384 *** X clipboard managers are now supported.
2385 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2387 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2388 in the current rectangle. With a prefix argument, this prompts for a
2389 number to count from and for a format string.
2391 ** `redisplay-dont-pause' now defaults to t.
2392 This makes Emacs feel more responsive to editing commands that arrive
2393 at high rate, e.g. if you lean on some key, because stopping redisplay
2394 in the middle (when this variable is nil) forces more expensive
2395 updates later on, and Emacs appears to be unable to keep up.
2397 ** The behavior of <TAB> for active regions in Text mode has changed.
2398 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2399 when the region is active causes Emacs to indent all the lines in the
2400 region, aligning them with the line previous to the first line in the
2401 region (or with the left margin if there is no previous line).
2403 ** When `occur' is called with a prefix argument, matching strings are
2404 collected into the `*Occur*' buffer without line numbers. If there
2405 are parenthesized subexpressions in the specified regexp, `occur'
2406 reads replacement text that may contain \\& and \\N whose convention
2407 follows `replace-match'.
2410 * Changes in Specialized Modes and Packages in Emacs 24.1
2412 ** Archive Mode has basic support for browsing and updating 7z archives.
2416 *** BibTeX mode now supports biblatex.
2417 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2418 `bibtex-entry-field-alist' is now an obsolete alias for
2419 `bibtex-BibTeX-entry-alist'.
2421 *** New command `bibtex-search-entries', bound to C-c C-a.
2423 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2425 *** New variable `bibtex-search-entry-globally'.
2429 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2431 *** The default browser used by the package is now the "xdg-open" program,
2432 on platforms that support it. This calls your desktop's preferred browser.
2436 *** Support for musical notes.
2438 *** Support for logarithmic units.
2440 *** No longer uses the tex prefix for TeX specific unit names when
2441 using TeX or LaTeX mode.
2443 *** New option to highlight selections using faces.
2445 *** `calc-histogram' has the option of using a vector to determine the bins.
2447 *** New "O" option prefix.
2449 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2451 ** Calendar, Diary, and Appt
2453 *** Diary entries can contain non-printing "comments".
2454 See the variable `diary-comment-start'.
2456 *** Appointments can specify their individual warning times.
2457 See the variable `appt-warning-time-regexp'.
2459 *** The function specified by `appt-disp-window-function' may be passed
2460 lists of arguments if multiple appointments are due at similar times.
2461 If you are using a custom function for this, you should update it.
2463 *** New function `diary-hebrew-birthday'.
2465 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2466 may no longer be nil, but must all be strings.
2468 *** The obsolete (since Emacs 22.1) method of enabling the appt
2469 package by adding `appt-make-list' to `diary-hook' has been removed.
2470 Use `appt-activate' instead.
2472 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2473 appt-issue-message (use the function appt-activate)
2474 appt-visible/appt-msg-window (use the variable appt-display-format)
2476 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2477 view-diary-entries, list-diary-entries, show-all-diary-entries
2481 *** New feature to "guess" the style in an existing buffer.
2482 The main entry point is M-x c-guess.
2484 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2486 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2487 Thus C-M-a will, by default, go to the beginning of the immediate function,
2490 *** "Macros with semicolons" can be registered for correct indentation.
2491 Where such a macro ends a line (no semicolon) the next statement is no longer
2492 parsed as a statement continuation.
2494 ** Comint and modes derived from it use the standard completion code.
2498 *** Compilation mode can be used without Font Lock mode.
2499 `compilation-parse-errors-function' is now obsolete.
2501 *** New variable `compilation-filter-start', which is bound while
2502 `compilation-filter-hook' runs. It records the start position of the
2503 text inserted by `compilation-filter'.
2505 *** `compilation-error-screen-columns' and `compilation-first-column'
2506 are obeyed in the editing buffer. So programming language modes can
2507 set them, whereas previously only the value in the *Compilation*
2512 *** Customize buffers now contain a search field.
2513 The search is performed using `customize-apropos'.
2514 To turn off the search field, set `custom-search-field' to nil.
2516 *** Options in customize group buffers start out hidden if not customized.
2517 Use the arrow to the left of the option name to toggle visibility.
2519 *** custom-buffer-sort-alphabetically now defaults to t.
2521 *** The color widget now has a "Choose" button, which allows you to
2522 choose a color via `list-colors-display'.
2526 *** It is now possible to access buses other than the default system
2529 *** The `dbus-register-method' and `dbus-register-property' functions
2530 optionally do not register names.
2532 *** The new function `dbus-register-service' registers a known service
2533 name on a D-Bus without also registering a property or a method.
2537 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2538 if called with a prefix argument, read a file name from the minibuffer
2539 instead of using the current buffer.
2541 *** The "dired local variables" feature of Dired-x is obsolete.
2542 The standard directory local variables feature replaces it.
2546 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2547 controlling attempts to autojoin a channel.
2549 *** New variable `erc-coding-system-precedence': If we use `undecided'
2550 as the server coding system, this variable will then be consulted.
2551 The default is to decode strings that can be decoded as utf-8 as
2552 utf-8, and do the normal `undecided' decoding for the rest.
2556 *** The default value of `eshell-directory-name' has changed
2557 to be an "eshell" directory in `user-emacs-directory'.
2558 The old "~/.eshell/" directory is still used if it exists, though.
2562 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2563 It now supports multithread non-stop debugging and simultaneous
2564 debugging of several threads.
2568 *** RET (`image-toggle-animation') toggles animation, if applicable.
2569 Animation plays once, unless the option `image-animate-loop' is non-nil.
2573 *** New command M-x info-display-manual displays a named Info manual.
2574 If that manual is already visited in some Info buffer, it displays
2575 that buffer. (This is handy if you have many manuals in many *info*
2576 buffers, and don't remember the name of the buffer visiting the manual
2577 you want to consult.) Otherwise, it loads and displays the manual.
2579 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2580 This is for compatibility with the stand-alone Info reader program,
2581 and also because `Info-edit' is a rarely used command that is disabled
2584 ** Mail mode changes (not Message mode)
2586 *** New command M-x mail-add-attachment for adding MIME attachments
2588 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2589 (Its name is misleading, since it has nothing to do with MIME
2590 attachments.) The old name is now an obsolete alias to the new name.
2592 ** MH-E has been updated to MH-E version 8.3.1.
2593 See MH-E-NEWS for details.
2595 ** Modula-2 mode provides auto-indentation.
2597 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2599 ** nXML mode no longer binds C-RET to `nxml-complete'.
2600 Completion is now performed via `completion-at-point', bound to C-M-i
2601 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2602 default), this performs tag completion.
2604 ** Org mode has been updated to version 7.8.09.
2605 See ORG-NEWS for details.
2607 ** Prolog mode has been completely revamped, with lots of additional
2608 functionality such as more intelligent indentation, electricity,
2609 support for more variants, including Mercury, and a lot more.
2613 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2614 in the Rmail incoming message.
2616 *** The variable `rmail-message-filter' no longer has any effect.
2617 This change was made in Emacs 23.1 but was not advertised at the time.
2618 Try using `rmail-show-message-hook' instead.
2622 *** M-x shell prompts for the shell path name if the default directory
2623 is a remote file name and neither the environment variable $ESHELL nor
2624 the variable `explicit-shell-file-name' is set.
2626 *** TAB is now bound to the standard `completion-at-point' command,
2627 which now implements the pcomplete rules for shell command completion.
2631 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2632 if the mail server supports them. This uses either built-in GnuTLS
2633 support, or the starttls.el library. Customize `smtpmail-stream-type'
2636 *** The variable `smtpmail-auth-credentials' has been removed.
2637 By default, the information is now stored in the file ~/.authinfo.
2638 This was the default value of smtpmail-auth-credentials. If you had
2639 customized smtpmail-auth-credentials to a list of user names and
2640 passwords, those settings are not used. During your first connection
2641 to the smtp server, Emacs will prompt for the user name and password,
2642 and offer to save them to ~/.authinfo. Or you can manually copy the
2643 credentials to ~/.authinfo. For example, if you had
2645 (setq smtpmail-auth-credentials
2646 '(("mail.example.org" 25 "jim" "s!cret")))
2648 then the equivalent line in ~/.authinfo would be
2650 machine mail.example.org port 25 login jim password s!cret
2652 See the auth-source manual for more information, e.g. on encrypting
2653 the credentials file.
2655 *** The variable `smtpmail-starttls-credentials' has been removed.
2656 If you had that set, you need to put
2658 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2660 in your ~/.authinfo file instead.
2662 *** SMTPmail defaults to using the address in the From: header as the
2663 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2664 to the address you wish to use instead.
2668 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2669 and `sql-oracle-scan-on'.
2671 *** New options controlling prompting for login parameters.
2672 Each supported product has a custom variable `sql-*-login-params',
2673 which is a list of the parameters to be prompted for before a
2674 connection is established.
2676 *** The command `sql-product-interactive' now takes a prefix argument,
2677 which causes it to prompt for an SQL product.
2679 *** Product-specific SQL interactive commands now take prefix arguments.
2680 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2681 given a prefix argument, prompt for a name for the SQL interactive
2682 buffer. This reduces the need for calling `sql-rename-buffer'.
2684 *** SQL interactive modes suppress command continuation prompts, and
2685 replace tabs with spaces. The first change impacts multiple line SQL
2686 statements entered with C-j between each line, statements yanked into
2687 the buffer and statements sent with `sql-send-*' functions. The
2688 second prevents the MySQL and Postgres interpreters from listing
2689 object name completions when sent text via `sql-send-*' functions.
2691 *** New command `sql-connect' starts a predefined SQLi session,
2692 using the login parameters from `sql-connection-alist'.
2694 *** New "Save Connection" menu item in SQLi buffers.
2695 This gathers the login params specified for the SQLi session, if it
2696 was not started by a connection, and saves them as a new connection.
2698 *** New commands for listing database objects and details:
2699 sql-list-all and sql-list-table.
2701 *** An API for manipulating SQL product definitions has been added.
2705 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2709 *** New inline access method "ksu" (kerberized su).
2711 *** The following access methods are discontinued: "ssh1_old",
2712 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2714 *** The user option `remote-file-name-inhibit-cache' controls whether
2715 remote file attributes are cached for better performance.
2717 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2718 default value to "".
2720 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2721 for remote machines which support SELinux.
2723 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2724 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2725 the degree of parallelism.
2727 ** VC and related modes
2729 *** Support for pulling on distributed version control systems.
2730 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2731 supported (currently with Bzr, Git, and Mercurial), to update the
2732 current branch and working tree. A prefix argument means to prompt
2733 the user for specifics, e.g. a pull location.
2735 *** `vc-update' is now an alias for `vc-pull'.
2737 *** Support for merging on distributed version control systems.
2738 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2739 is supported (currently with Bzr, Git, and Mercurial), to merge
2740 changes from another branch into the current one. It prompts for
2741 specifics, e.g. a merge source.
2743 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2744 shows a diff while querying the user. It defaults to t.
2746 *** Log entries in some Log View buffers can be toggled to display a
2747 longer description by typing RET (log-view-toggle-entry-display).
2748 This is currently supported for Bzr, Git, and Mercurial (to support
2749 another backend, define a `log-view-expanded-log-entry-function').
2750 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2751 use this to display the full log entry for the revision at point.
2753 *** New command `vc-ediff' allows visual comparison of two revisions
2754 of a file similar to `vc-diff', but using ediff backend.
2756 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2757 this was not advertised at the time.
2759 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2760 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2761 this was not advertised at the time.
2767 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2769 *** partial-completion-mode (complete.el) is obsolete.
2770 You can get a comparable behavior with:
2771 (setq completion-styles '(partial-completion initials))
2772 (setq completion-pcm-complete-word-inserts-delimiters t)
2774 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2776 *** pgg is obsolete (use EasyPG instead).
2778 *** sregex.el is obsolete, since rx.el is a strict superset.
2780 *** s-region.el and pc-select.el are obsolete.
2781 They are superseded by shift-select-mode, enabled by default since 23.1.
2783 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2787 *** The Landmark game is now invoked with `landmark', not `lm'.
2788 Its functions and variables have been similarly renamed.
2790 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2791 (This interfered with cua-mode.)
2793 *** f90.el has some support for Fortran 2008 syntax.
2795 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2797 *** New command `nato-region' converts text to NATO phonetic alphabet.
2800 * New Modes and Packages in Emacs 24.1
2802 ** Occur Edit mode applies edits made in *Occur* buffers to the
2803 original buffers. It is bound to "e" in Occur mode.
2805 ** New global minor mode electric-pair-mode.
2806 When enabled, typing an open parenthesis automatically inserts the
2807 matching closing one.
2809 ** New global minor mode electric-indent-mode.
2810 When enabled, typing certain characters triggers reindentation.
2811 Major modes wishing to use this can set electric-indent-chars or
2812 electric-indent-functions.
2814 ** New global minor mode electric-layout-mode.
2815 When enabled, typing certain characters automatically inserts newlines.
2816 Major modes wishing to use this can set electric-layout-rules.
2818 ** tabulated-list.el provides a generic major mode for tabulated data,
2819 from which other modes can be derived.
2821 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2823 ** secrets.el is an implementation of the Secret Service API, an
2824 interface to password managers like GNOME Keyring or KDE Wallet. The
2825 Secret Service API requires D-Bus for communication. The command
2826 `secrets-show-secrets' offers a buffer with a visualization of the
2829 ** notifications.el provides an implementation of the Desktop
2830 Notifications API. It requires D-Bus for communication.
2832 ** soap-client.el supports access to SOAP web services from Emacs.
2833 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2835 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
2837 ** New emacs-lock.el package.
2838 The previous version has been moved to obsolete/old-emacs-lock.el.
2839 Now, there is a proper minor mode `emacs-lock-mode'. Protection
2840 against exiting Emacs and killing the buffer can be set separately.
2841 The mechanism for automatically turning off protection for buffers
2842 with dead inferior processes has been generalized.
2845 * Incompatible Lisp Changes in Emacs 24.1
2847 ** Passing a nil argument to a minor mode function call now ENABLES
2848 the minor mode unconditionally. This is so that you can write e.g.
2850 (add-hook 'text-mode-hook 'foo-mode)
2852 to enable foo-mode in Text mode buffers, removing the need for
2853 `turn-on-foo-mode' style functions. This affects all mode commands
2854 defined by `define-minor-mode'. If called interactively, the mode
2855 command still toggles the minor mode.
2857 ** The return value of `backup-buffer' has changed.
2858 It is now a list of three elements, where the second element is a list
2859 describing the original file's SELinux context. If Emacs or the
2860 system lacks SELinux support, the context list is (nil nil nil nil).
2861 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
2863 ** `char-direction-table' and the `char-direction' function were deleted.
2864 They were buggy and inferior to the new support of bidirectional
2865 editing introduced in Emacs 24. If you need the bidirectional
2866 properties of a character, use `get-char-code-property' with the last
2867 argument `bidi-class'.
2869 ** `copy-directory' now copies the source directory as a subdirectory
2870 of the target directory, if the latter is an existing directory. The
2871 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2872 the contents directly into a pre-existing target directory.
2874 ** For mouse click input events in the text area, the Y pixel
2875 coordinate in the POSITION list now counts from the top of the text
2876 area, excluding any header line. Previously, it counted from the top
2879 ** Support for "old-style" backquotes, obsolete for 10+ years, has
2880 been further reduced. Now a backquote not followed by a space is
2881 always treated as a "new-style" backquote. Please remove all
2882 "old-style" backquotes from your code. If your code uses backquotes
2883 as documented in the Elisp manual, and compiles without warning, then
2884 you have nothing to do in this regard. Code not following the
2885 appropriate conventions may fail to compile.
2887 The most common cause of trouble seems to be an old-style backquote
2888 followed by a newline. Another cause of trouble is vector notation
2889 for key sequence notation: instead of [(control ,)] and [(control ')],
2890 you should write [(control ?,)] and [(control ?')], which will work in
2893 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2894 was not advertised at the time. The function `custom-initialize-delay'
2895 replaced all known uses.
2897 ** `view-buffer' now treats special mode-class in the same way that
2898 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2899 major mode is special).
2901 ** Menu and tool bar changes
2903 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
2904 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2905 With these alist entries omitted, `make-frame' checks the value of the
2906 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2907 a menu-bar or tool-bar, respectively. If the alist entries are added,
2908 they override the value of `menu-bar-mode'/`tool-bar-mode'.
2910 *** The menu bar bindings's caches are not used any more.
2911 Use (where-is-internal <def> nil t) instead.
2913 ** Regions created by mouse dragging are now normal active regions,
2914 similar to those created by shift-selection (see Selection changes
2915 above). In previous Emacs versions, these regions were delineated by
2916 `mouse-drag-overlay'; that variable has been removed.
2918 ** The fourth argument of `filter-buffer-substring' has been removed.
2919 If you want to remove text properties from the final result, simply
2920 pass the result through substring-no-properties.
2922 ** cl.el no longer provides `cl-19'.
2924 ** The following obsolete functions and aliases have been removed
2925 (the appropriate new function is given in parentheses; "not needed"
2926 means you can just remove all calls to the function in question):
2928 *** `comint-kill-output' (`comint-delete-output')
2929 *** `decompose-composite-char' (`char-to-string')
2930 *** `outline-visible' (`outline-invisible-p')
2931 *** `internal-find-face' (`facep')
2932 *** `internal-get-face' (`facep and check-face')
2933 *** `frame-update-faces' (not needed)
2934 *** `frame-update-face-colors' (`frame-set-background-mode')
2935 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2936 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2937 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2938 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2939 *** `x-make-font-unbold' (`make-face-unbold')
2940 *** `x-make-font-unitalic' (`make-face-unitalic')
2941 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2942 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2943 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2944 *** `char-bytes' (== 1)
2945 *** `isearch-return-char' (`isearch-printing-char')
2946 *** `make-local-hook' (not needed)
2947 *** `set-screen-height' (`set-frame-height')
2948 *** `set-screen-width' (`set-frame-width')
2950 ** The following obsolete variables and varaliases have been removed
2951 (the appropriate new variable is given in parentheses):
2953 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2954 *** `vc-header-alist' (`vc-BACKEND-header')
2955 *** `directory-sep-char' (== ?/)
2956 *** `font-lock-defaults-alist' (`font-lock-defaults')
2957 *** `e' (`float-e').
2959 ** The following obsolete files were removed:
2960 sc.el, x-menu.el, rnews.el, rnewspost.el
2962 ** The format of the finder-inf.el file has changed, since the Finder
2963 mechanism is now based on the package system. The variable
2964 `finder-package-info' is replaced by `package--builtins' and
2965 `finder-keywords-hash'.
2967 ** When generating autoloads, `update-directory-autoloads' no longer
2968 assumes every inspected file is in your `load-path'. It instead
2969 generates relative names according to the current `load-path'.
2972 * Lisp Changes in Emacs 24.1
2974 ** Code can now use lexical scoping by default instead of dynamic scoping.
2975 The `lexical-binding' variable enables lexical scoping for local
2976 variables. It is typically set via a file-local variable in the first
2977 line of the file, in which case it applies to all the code in that
2980 *** `eval' takes a new optional argument `lexical' to choose the new lexical
2981 binding instead of the old dynamic binding mode.
2983 *** Lexically scoped interpreted functions are represented with a new form
2984 of function value which looks like (closure ENV ARGS &rest BODY).
2986 *** New macro `letrec' to define recursive local functions.
2988 *** `defvar' and `defconst' now mark the variable as special (dynamic).
2989 So do `defcustom' and other forms that call `defvar' as a subroutine.
2991 *** New function `special-variable-p' to check whether a variable is
2992 declared as dynamically bound.
2994 *** The form ((lambda ...) ...) is deprecated.
2996 ** An Emacs Lisp testing tool is now included.
2997 Emacs Lisp developers can use this tool to write automated tests for
2998 their code. See the ERT info manual for details.
3000 ** Changes for bidirectional display and editing
3002 *** New function `current-bidi-paragraph-direction'.
3003 This returns the base direction of the paragraph at point.
3005 *** New function `bidi-string-mark-left-to-right'.
3006 Given a string containing characters from right-to-left scripts, this
3007 function returns another string which can be safely inserted into a
3008 buffer, such that any following text will be always displayed to the
3009 right of that string. (This works by appending an invisible Unicode
3010 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3012 This is useful when the buffer has overall left-to-right paragraph
3013 direction and you need to insert a string whose contents are not known
3014 in advance, without disrupting the layout of the line.
3018 *** Window tree functions are accessible in Elisp.
3019 Functions are provided to return the parent, siblings or child windows
3020 of any window including internal windows (windows not associated with a
3021 buffer) in the window tree.
3023 **** New function `window-valid-p' gives non-nil for live and internal
3026 **** Window manipulation can deal with internal windows.
3027 Many window handling functions like `split-window', `delete-window', or
3028 `delete-other-windows' as well as the window resizing functions can now
3029 act on any window including internal ones.
3031 *** window-total-height/-width vs window-body-height/-width.
3032 The function `window-height' has been renamed to `window-total-height'
3033 and `window-width' has been renamed to `window-body-width'. The old
3034 names are provided as aliases. Two new functions `window-total-width'
3035 and `window-body-height' are provided.
3037 *** Window parameters specific to window handling functions.
3038 For each window you can specify a parameter to override the default
3039 behavior of a number of functions like `split-window', `delete-window'
3040 and `delete-other-windows'. The variable `ignore-window-parameters'
3041 allows to ignore processing such parameters.
3043 *** New semantics of third argument of `split-window'.
3044 The third argument of `split-window' has been renamed to SIDE and can be
3045 set to any of the values 'below, 'right, 'above, or 'left to make the
3046 new window appear on the corresponding side of the window that shall be
3047 split. Any other value of SIDE will cause `split-window' to split the
3048 window into two side-by-side windows as before.
3050 *** Window resizing functions.
3051 A new standard function for resizing windows called `window-resize' has
3052 been introduced. This and all other functions for resizing windows no
3053 longer delete any windows when they become too small.
3055 *** Deleting the selected window now selects the most recently selected
3056 live window on that frame instead.
3058 *** `adjust-window-trailing-edge' adjustments.
3059 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3060 is able to resize other windows if a window adjacent to the trailing
3061 edge cannot be shrunk any more. This makes its behavior more similar to
3062 that of Emacs 21 without compromising, however, its inability to delete
3063 windows which was introduced in Emacs 22.
3065 *** Window-local buffer lists.
3066 Windows now have local buffer lists. This means that removing a buffer
3067 from display in a window will preferably show the buffer previously
3068 shown in that window with its previous window-start and window-point
3069 positions. This also means that the same buffer may be automatically
3070 shown twice even if it already appears in another window.
3072 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3073 which if non-nil requires the buffer to be displayed in the currently
3074 selected window, signaling an error otherwise. If nil, another window
3075 can be used, e.g. if the selected one is strongly dedicated.
3077 *** `split-window-vertically' and `split-window-horizontally' renamed
3078 to `split-window-below' and `split-window-right' respectively.
3079 The old names are kept as aliases.
3083 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3084 named ACTION, and takes a display action of the same form as
3085 `display-buffer-base-action' (see Changes, above). A non-nil,
3086 non-list value is treated specially, as the old meaning.
3088 **** New variable `display-buffer-overriding-action'.
3090 **** The procedure of `display-buffer' etc. to choose a window is
3091 determined by combining `display-buffer-overriding-action',
3092 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3093 and `display-buffer-fallback-action'. The second and fourth of these
3094 are user-customizable variables.
3096 See the docstring of `display-buffer' for details.
3098 *** New functions `window-state-get' and `window-state-put'.
3099 These functions allow to save and restore the state of an arbitrary
3100 frame or window as an Elisp object.
3104 *** New variable `completion-extra-properties' used to specify extra
3105 properties of the current completion:
3106 - :annotate-function, same as the old completion-annotate-function.
3107 - :exit-function, function to call after completion took place.
3109 *** Functions on `completion-at-point-functions' can return any of the
3110 properties valid for `completion-extra-properties'.
3112 *** `completion-annotate-function' is obsolete.
3114 *** New `metadata' method for completion tables. The metadata thus returned
3115 can specify various details of the data returned by `all-completions':
3116 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3117 used to select a style in completion-category-overrides.
3118 - `annotation-function' to add annotations in *Completions*.
3119 - `display-sort-function' to specify how to sort entries in *Completions*.
3120 - `cycle-sort-function' to specify how to sort entries when cycling.
3122 *** `minibuffer-local-filename-must-match-map' is not used any more.
3123 Instead, the bindings in `minibuffer-local-filename-completion-map'
3124 are combined with `minibuffer-local-must-match-map'.
3126 *** New variable `completing-read-function' allows overriding the
3127 behavior of `completing-read'.
3129 ** `glyphless-char-display' can now distinguish between graphical and
3130 text terminal display, via a char-table entry that is a cons cell.
3132 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3133 Instead, the offending function is removed.
3137 *** New function `run-hook-wrapped' for running an abnormal hook by
3138 passing the hook functions as arguments to a "wrapping" function.
3139 Like `run-hook-with-args-until-success', it stops at the first
3140 non-nil return value.
3142 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3143 set of "wrapping" filters, similar to around advice.
3144 (A version of this macro was actually added in Emacs 23.2 but was not
3145 advertised at the time.)
3149 *** New macro `condition-case-unless-debug' (this was actually added in
3150 Emacs 23.1 as condition-case-no-debug, but not advertised)
3152 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3154 *** Variable `stack-trace-on-error' removed.
3156 *** The debugger can now "continue" from an error, which means it will
3157 jump to the error handler as if the debugger had not been invoked
3158 instead of jumping all the way to the top-level.
3160 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3161 This can be useful when `inhibit-quit' is set.
3163 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3164 named Emacs server instances.
3166 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3167 to redirect STDOUT to a file.
3169 ** The function `format-time-string' now supports the %N directive,
3170 for higher-resolution time stamps.
3172 ** New input reading functions
3174 *** New function `read-char-choice' reads a restricted set of
3175 characters, discarding any inputs not inside the set.
3177 *** The command `read-color' now requires a match for a color name
3178 or RGB triplet, instead of signaling an error if the user provides
3181 **** `facemenu-read-color' is now an alias for `read-color'.
3183 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3184 The variable is now used to load all kind of supported dynamic libraries,
3185 not just image libraries. The previous name is still available as an
3188 ** Syntax parsing changes
3190 *** New variable `syntax-propertize-function'.
3191 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3192 This allows syntax-table properties to be set independently from font-lock:
3193 just call syntax-propertize to make sure the text is propertized.
3194 Together with this new variable come a new hook
3195 syntax-propertize-extend-region-functions, as well as two helper functions:
3196 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3197 as-is; and syntax-propertize-rules which provides a new way to specify
3200 *** Syntax tables support a new "comment style c" additionally to style b.
3202 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3204 ** frame-local variables cannot be let-bound any more.
3206 ** Major and minor mode changes
3208 *** `set-auto-mode' now respects mode: local variables at the end of files,
3209 as well as those in the -*- line.
3211 *** `prog-mode' is a new major mode from which programming modes
3214 **** `prog-mode-hook' can be used to enable features for programming
3215 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3216 on-the-fly spell checking for comments and strings.
3218 **** New minor modes `prettify-symbols-mode' and
3219 `global-prettify-symbols-mode' let the user enable symbol
3220 prettification (replacing a string like "lambda" with the Greek lambda
3223 *** New hook `change-major-mode-after-body-hook', run by
3224 `run-mode-hooks' just before any other mode hooks.
3226 *** Enabled globalized minor modes can be disabled in specific major modes.
3227 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3228 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3230 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3232 ** File-handling changes
3234 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3235 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3236 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3237 argument is supplied (see Trash changes, above).
3239 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3241 ** Tool-bars can display separators.
3242 Tool-bar separators are handled like menu separators in menu-bar maps,
3243 i.e. via menu entries of the form `(menu-item "--")'.
3247 *** Animated images support (currently animated gifs only).
3249 **** `image-animated-p' returns non-nil if an image can be animated.
3251 **** `image-animate' animates a supplied image spec.
3253 **** `image-animate-timer' returns the timer object for an image that
3256 *** `image-extension-data' has been renamed to `image-metadata'.
3257 The old name is an obsolete alias to the new one.
3259 *** Image mode can view any image type that ImageMagick supports.
3260 This requires Emacs to be built with ImageMagick support.
3262 **** New function `imagemagick-types', defined if ImageMagick support
3263 is enabled, returns a list of image file extensions that your
3264 ImageMagick installation supports.
3266 **** New function `imagemagick-register-types' enables ImageMagick
3267 image types in Image mode and in `create-image' and other helper
3270 **** New option `imagemagick-types-inhibit' excludes certain
3271 ImageMagick image types from `imagemagick-register-types'.
3273 **** With ImageMagick support, there are extra Image mode commands to
3274 resize and rotate images: `image-transform-fit-to-height',
3275 `image-transform-fit-to-width', `image-transform-set-rotation', and
3276 `image-transform-set-scale'.
3278 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3279 passes it to the mail user agent function. This argument specifies an
3280 action for returning to the caller after finishing with the mail. For
3281 example, this is used by Rmail to optionally delete a mail window.
3283 ** XML and HTML parsing
3284 If Emacs is compiled with libxml2 support, there are two new
3285 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3286 and `libxml-parse-xml-region' (which parses XML). Both return an
3287 Emacs Lisp parse tree.
3289 ** Networking and encryption changes
3291 *** `open-network-stream' can now be used to open an encrypted stream.
3292 It now accepts an optional `:type' parameter for initiating a TLS
3293 connection, directly or via STARTTLS. To do STARTTLS, additional
3294 parameters (`:end-of-command', `:success', `:capabilities-command')
3295 must also be supplied.
3297 *** New library gnutls.el.
3298 The new function `gnutls-available-p' returns non-nil if Emacs is
3299 built with GnuTLS support. The main entry points are
3300 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3301 these functions through `open-network-stream', because that can
3302 upgrade connections through STARTTLS opportunistically or use plain
3303 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3306 *** New primitive `secure-hash' that supports many secure hash algorithms:
3307 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3308 sha1.el has been removed. The `sha1' feature is provided by default.
3312 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3314 ** Progress reporters can now "spin".
3315 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3316 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3317 time you call `progress-reporter-update' on that progress reporter,
3318 with a nil or omitted VALUE argument, the reporter message is
3319 displayed with a "spinning bar".
3321 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3322 being reverted, even if the buffer has a local `revert-buffer-function'.
3324 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3325 If delayed-warnings-list is non-nil, the command loop calls
3326 `delayed-warnings-hook' after `post-command-hook'. At present, this
3327 is only used by Emacs on some platforms to display warnings during
3328 startup, which might otherwise not be noticed. This uses the
3329 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3331 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3333 ** New function `make-composed-keymap' that constructs a new keymap
3334 from multiple input maps. You can use this to make a keymap that
3335 inherits from multiple maps, eg:
3336 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3338 ** New function `string-prefix-p'.
3339 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3341 ** New reader macro ## that stands for the empty symbol.
3342 This means that the empty symbol can now be read back. Also, #: by itself
3343 (when not immediately followed by a possible symbol character) stands for
3344 an empty uninterned symbol.
3346 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3348 ** The following functions and variables are obsolete:
3350 *** `tooltip-use-echo-area' is obsolete.
3351 Rather than setting this to t, disable Tooltip mode instead.
3353 *** buffer-substring-filters is obsolete.
3354 Use `filter-buffer-substring-functions' instead.
3356 *** `byte-compile-disable-print-circle' is obsolete.
3358 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3359 Use `post-command-hook' instead.
3361 *** `font-lock-maximum-size' is obsolete.
3364 * Changes in Emacs 24.1 on Non-Free Operating Systems
3366 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3367 and also when HOME is set to C:\ by default.
3369 ** New configure.bat options
3371 *** --enable-checking builds Emacs with extra runtime checks.
3373 *** --distfiles specifies files to be included in binary distribution.
3375 *** --without-gnutls disables automatic GnuTLS detection.
3377 *** --lib for general library linkage, works with the USER_LIBS build variable.
3379 ** New make target `dist' to create binary distribution for MS Windows.
3381 ** The Lisp function `w32-default-color-map' is now obsolete.
3382 (It is only used internally in the Emacs C code.)
3384 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3385 reappear on mouse-over. (Requires OS X 10.6 or later.)
3387 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3388 other platforms, rather than inserting its contents into the buffer.
3391 ----------------------------------------------------------------------
3392 This file is part of GNU Emacs.
3394 GNU Emacs is free software: you can redistribute it and/or modify
3395 it under the terms of the GNU General Public License as published by
3396 the Free Software Foundation, either version 3 of the License, or
3397 (at your option) any later version.
3399 GNU Emacs is distributed in the hope that it will be useful,
3400 but WITHOUT ANY WARRANTY; without even the implied warranty of
3401 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3402 GNU General Public License for more details.
3404 You should have received a copy of the GNU General Public License
3405 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3410 paragraph-separate: "[
\f]*$"