1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2013 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that all necessary updates to the manuals in doc/ are complete.
19 --- means no change in the manuals is needed.
20 When you add a new item, use the appropriate mark if you know it applies,
21 otherwise leave it unmarked.
24 * Installation Changes in Emacs 24.4
26 ** Emacs can be compiled with ACL support.
27 This happens by default if a suitable support library is found at
28 build time, like libacl on GNU/Linux. To prevent this, use the
29 configure option `--disable-acl'.
31 ** Emacs can be compiled with file notification support.
32 This happens by default if a suitable system library is found at
33 build time. To prevent this, use the configure option
34 `--with-file-notification-no'. See below for file-notify features.
35 FIXME? This feature is not available for the Nextstep port. (?)
37 ** The configure option `without-compress-info' has been generalized,
38 and renamed to `without-compress-install'. It now prevents compression
39 of _any_ files during installation.
41 ** The configure option --with-crt-dir has been removed.
42 It is no longer needed, as the crt*.o files are no longer linked
45 ** Directories passed to configure option `--enable-locallisppath' are
46 no longer created during installation.
48 ** Emacs can be compiled with zlib support. If this library is present
49 (which it normally is on most systems), the function
50 `zlib-decompress-region' becomes available, which can decompress gzip-
51 and zlib-format compressed data.
54 ** Emacs for NS (OSX, GNUStep) can be built with ImageMagick support.
55 pkg-config is required to find ImageMagick libraries.
57 ** For OSX >= 10.5, the Core text based font backend from the Mac port is used.
58 For GNUStep and OSX 10.4 the old backend is used.
59 To use the old backend by default, do on the command line:
60 % defaults write org.gnu.Emacs FontBackend ns
63 * Startup Changes in Emacs 24.4
66 * Changes in Emacs 24.4
68 ** Key ? also describes prefix bindings like C-h.
71 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
72 because it affects caching of paragraph scanning results as well.
75 ** `apropos-variable' is now `apropos-user-option'
76 `apropos-user-option' shows all user options while `apropos-variable'
77 shows all variables. When called with a universal prefix argument,
78 the two commands swap their behaviors. When `apropos-do-all' is
79 non-nil, they output the same results.
82 ** `eval-defun' on an already defined defcustom calls the :set function,
85 ** If the new variable `enable-dir-local-variables' is nil,
86 directory local variables are ignored. May be useful for some modes
87 that want to ignore directory-locals while still respecting file-locals.
89 ** The option `set-mark-default-inactive' has been deleted.
90 This unfinished feature was introduced by accident in Emacs 23.1;
91 simply disabling Transient Mark mode does the same thing.
93 ** `initial-buffer-choice' can now specify a function to set up the
96 ** The *Messages* buffer is created in a new major mode `messages-buffer-mode',
97 and read-only. Code that might create the *Messages* buffer should
98 call the function `messages-buffer' to do so and set the mode.
100 ** `remember-notes' creates a buffer whose content is saved on kill-emacs.
101 You may think of it as a *scratch* buffer whose content is preserved.
102 In fact, it was designed as a replacement for *scratch* buffer and can
103 be used that way by setting `initial-buffer-choice' to `remember-notes'
104 and `remember-notes-buffer-name' to "*scratch*". Without the second
105 change, *scratch* buffer will still be there for notes that do not
106 need to be preserved.
108 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
110 ** ACL support has been added.
112 *** Emacs preserves the ACL entries of files when backing up.
114 *** New functions `file-acl' and `set-file-acl' get and set the ACL
115 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
116 libacl. On MS-Windows, the NT Security APIs are used to emulate the
117 POSIX ACL interfaces.
119 ** New option `scroll-bar-adjust-thumb-portion'.
120 Available only on X, this option allows to control over-scrolling
121 using the scroll bar (i.e. dragging the thumb down even when the end
122 of the buffer is visible).
124 ** New function `add-face-text-property' has been added, which can be
125 used to conveniently prepend/append new face attributes to text.
127 ** In compiled Lisp files, the header no longer includes a timestamp.
129 ** Multi-monitor support has been added.
131 *** New functions `display-monitor-attributes-list' and
132 `frame-monitor-attributes' can be used to obtain information about
133 each physical monitor on multi-monitor setups.
135 *** The functions `display-pixel-width' and `display-pixel-height' now
136 behave consistently among the platforms: they return the pixel width
137 or height for all physical monitors associated with the given display
138 as just they were on X11. To get information for each physical
139 monitor, use the new functions above. Similar notes also apply to
140 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
141 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
143 ** New macro `alternatives-define' can be used to define generic commands.
144 Generic commands are interactive functions whose implementation can be
145 selected among several alternatives, as a matter of user preference.
147 ** The blink cursor stops blinking after 10 blinks (default) on X and NS.
148 You can change the default by customizing the variable blink-cursor-blinks.
149 Also timers for blinking are stopped when no blinking is done, so Emacs does
150 not consume CPU cycles.
152 ** New command `frameset-to-register' is now bound to `C-x r f', replacing
153 `frame-configuration-to-register'. It offers similar functionality, plus
154 some enhancements, like the ability to restore deleted frames. Command
155 `frame-configuration-to-register' is still available, but unbound.
158 * Editing Changes in Emacs 24.4
160 ** `split-window' is no longer a command, just a non-interactive function.
161 As a command it was a special case of `split-window-below', and as such
162 superfluous. After being reimplemented in Lisp, its interactive form
163 was mistakenly retained.
165 ** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
166 bound to <f11> and M-<f10>, respectively.
168 ** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
172 ** New option `visual-order-cursor-movement'.
173 If this is non-nil, cursor motion with arrow keys will follow the
174 visual order of characters on the screen: <left> always moves to the
175 left, <right> always moves to the right, disregarding the surrounding
176 bidirectional context.
178 ** New command `kmacro-to-register' to store keyboard macros in registers.
182 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
183 You can pick the name of the function and the variables with `C-x 4 a'.
186 * Changes in Specialized Modes and Packages in Emacs 24.4
188 ** The debugger's `e' command evaluates the code in the context at point.
189 This includes using the lexical environment at point, which means that
190 `e' now lets you access lexical variables as well.
192 ** `eshell' now supports visual subcommands and options
193 Eshell has been able to handle "visual" commands (interactive,
194 non-line oriented commands such as top that require display
195 capabilities not provided by eshell) by running them in an Emacs
196 terminal emulator. See `eshell-visual-commands'.
198 This feature has been extended to subcommands and options that make a
199 usually line-oriented command a visual command. Typical examples are
200 "git log" and "git <command> --help" which display their output in a
201 pager by default. See `eshell-visual-subcommands' and
202 `eshell-visual-options'.
204 ** If your Emacs is compiled with libxml2 support, you can use the new
205 built-in web browser `eww'.
207 ** `remember' can now store notes in separates files
208 You can use the new function `remember-store-in-files' within the
209 `remember-handler-functions' option.
211 See `remember-data-directory' and `remember-directory-file-name-format'
212 for new options related to this function.
214 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
216 ~/.emacs.d/timelog replaces ~/.timelog
217 ~/.emacs.d/vip replaces ~/.vip
218 ~/.emacs.d/viper replaces ~/.viper
219 ~/.emacs.d/ido.last replaces ~/.ido.last
220 ~/.emacs.d/kkcrc replaces ~/.kkcrc
221 ~/.emacs.d/quickurls replaces ~/.quickurls
222 ~/.emacs.d/idlwave replaces ~/.idlwave
223 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
224 ~/.emacs.d/places replaces ~/.emacs-places
225 ~/.emacs.d/shadows replaces ~/.shadows
226 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
227 ~/.emacs.d/strokes replaces ~/.strokes
228 ~/.emacs.d/notes replaces ~/.notes
229 ~/.emacs.d/type-break replaces ~/.type-break
230 Also the following files used by the now obsolete otodo-mode.el:
231 ~/.emacs.d/todo-do replaces ~/.todo-do
232 ~/.emacs.d/todo-done replaces ~/.todo-done
233 ~/.emacs.d/todo-top replaces ~/.todo-top
236 ** Delphi mode is now called OPascal mode.
237 *** All delphi-* variables and functions have been renamed to opascal-*.
238 *** `delphi-newline-always-indents' is not supported any more.
239 Use `electric-indent-mode' instead.
240 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
242 ** Eldoc Mode works properly in the minibuffer.
244 ** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
246 ** completing-read-multiple's separator can now be a regexp.
247 The default separator is changed to allow surrounding spaces around the comma.
251 *** Battery information via the BSD `apm' utility is now supported.
255 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
257 ** Calendar and Diary
259 *** New faces: `calendar-weekday-header', `calendar-weekend-header',
260 `calendar-month-header'.
262 *** New option `calendar-day-header-array'.
264 *** The variable `calendar-font-lock-keywords' is obsolete.
267 *** New variable `diary-from-outlook-function', used by the command
268 `diary-from-outlook'.
270 ** VC and related modes
272 *** In VC directory mode, `D' displays diffs between VC-controlled
273 whole tree revisions.
275 *** In VC directory mode, `L' lists the change log for the current VC
276 controlled tree in a window.
278 *** In VC directory mode, `I' shows a log of changes that will be
279 received with a pull operation.
281 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
282 under current version control system. When called with a prefix
283 argument, you can remove a file from the ignored file list.
285 *** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
286 because it is moved to vc-cvs.el.
290 *** New macro cl-tagbody.
293 *** letf is now just an alias for cl-letf.
297 *** Calc by default now uses the Gregorian calendar for all dates, and
298 uses January 1, 1 AD as its day number 1. Previously Calc used the
299 Julian calendar for dates before September 14, 1752, and it used
300 December 31, 1 BC as its day number 1; the new scheme is more
301 consistent with Calendar's calendrical system and day numbering.
303 *** The new variable `calc-gregorian-switch' lets you configure the
304 date when Calc switches from the Julian to the Gregorian calendar.
305 Nil, the default value, means to always use the Gregorian calendar.
306 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
309 *** Support for ISO 8601 dates.
313 *** `desktop-auto-save-timeout' defines the number of seconds between
314 auto-saves of the desktop.
316 *** `desktop-restore-frames', enabled by default, allows saving and
317 restoring the frame/window configuration (frameset). Additional options
318 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
319 and `desktop-restore-forces-onscreen' offer further customization.
323 *** New minor mode `dired-hide-details-mode' hides details.
327 *** New option `erc-accidental-paste-threshold-seconds'.
328 If set to a number, this can be used to avoid accidentally paste large
329 amounts of data into the ERC input.
333 *** New option `epa-mail-aliases'.
335 You can set this to a list of alias expansions for keys to use
336 in `epa-mail-encrypt'.
338 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
339 that means: when one of the recipients of the message being encrypted
340 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
342 If one element of the variable's value is ("foo@bar.com"),
343 that means: when one of the recipients of the message being encrypted
344 is `foo@bar.com', ignore that name as regards encryption.
345 This is useful to avoid a query when you have no key for that name.
348 ** New F90 mode option `f90-smart-end-names'.
350 ** Icomplete is a bit more like Ido.
351 *** key bindings to navigate through and select the completions.
352 *** The icomplete-separator is customizable, and its default has changed.
353 *** Removed icomplete-show-key-bindings.
354 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
355 (setq icomplete-with-completion-tables '(internal-complete-buffer))
356 will revert to the old behavior.
360 *** Ido has a manual now.
361 *** `ido-use-virtual-buffers' takes a new value 'auto.
362 *** `ido-decorations' has been slightly extended to give a bit more control.
366 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
367 visit the next image file and the previous image file in the same
368 directory, respectively.
370 *** New commands to show specific frames of multi-frame images.
371 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
372 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
374 *** New commands to speed up, slow down, or reverse animation.
377 *** The command `image-mode-fit-frame' deletes other windows.
378 When toggling, it restores the frame's previous window configuration.
379 It also has an optional frame argument, which can be used by Lisp
380 callers to fit the image to a frame other than the selected frame.
384 *** New face `info-index-match' is used to highlight matches in index
385 entries displayed by `Info-index-next', `Info-virtual-index' and
390 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
391 will cycle through faces in `hi-lock-face-defaults' without prompting.
394 *** New global command `M-s h .' (`highlight-symbol-at-point')
395 highlights the symbol found near point without prompting,
396 using the next face automatically.
398 ** Search and Replace
400 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
401 starts a symbol (identifier) incremental search forward with the
402 symbol found near point added to the search string initially.
404 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
405 and adds it to the search string.
407 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
408 between nil and the value of the option `search-invisible' (or `open'
411 *** `query-replace' skips invisible text when `search-invisible' is nil,
412 and opens overlays with hidden text when `search-invisible' is `open'.
415 *** By default, prefix arguments do not now terminate Isearch mode.
416 Set `isearch-allow-prefix' to nil to restore old behavior.
418 *** More Isearch commands accept prefix arguments, namely
419 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
422 *** Word search now matches whitespace at the beginning/end
423 of the search string if it contains leading/trailing whitespace.
424 In an incremental word search or when using a non-nil LAX argument
425 of `word-search-regexp', the lax matching can also match part of
426 the first word (in addition to the lax matching of the last word).
427 The same rules are now applied to the symbol search with the difference
428 that it matches symbols, and non-symbol characters between symbols.
430 ** MH-E has been updated to MH-E version 8.5.
431 See MH-E-NEWS for details.
434 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
435 Customize `unrmail-mbox-format' to change this.
438 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
439 of how Rmail displays non-MIME messages.
442 ** New function `ses-rename-cell' to give SES cells arbitrary names.
444 ** trace-function was largely rewritten.
445 New features include:
446 - no prompting for the destination buffer, unless a prefix-arg was used.
447 - additionally to prompting for a destination buffer, when a prefix-arg is
448 used, the user can enter a "context", i.e. Lisp expression whose value at the
449 time the function is entered/exited will be printed along with the function
450 name and arguments. Useful to trace the value of (current-buffer) or
451 (point) when the function is invoked.
453 ** New command `delete-duplicate-lines' has new types of operation:
454 When its arg ADJACENT is non-nil (when called interactively with C-u C-u)
455 it works like the utility `uniq'. Otherwise by default it deletes
456 duplicate lines everywhere in the region without regard to adjacency.
457 When its arg KEEP-BLANKS is non-nil (when called interactively with
458 C-u C-u C-u), duplicate blank lines are preserved.
460 ** New `cycle-spacing' command allows cycling between having just one
461 space, no spaces, or reverting to the original spacing. Like
462 `just-one-space' command it can handle or ignore newlines and
463 leave different number of spaces.
465 ** Todo mode has been rewritten and enhanced.
466 New features include:
467 - support for multiple todo files and archive files of done items;
468 - renaming, reordering, moving, merging, and deleting categories;
469 - sortable tabular summaries of categories and the types of items they contain;
470 - cross-category lists of items filtered by specific criteria;
471 - more fine-grained interaction with the Emacs diary, by being able to decide
472 for each todo item whether it appears in the Fancy Diary display;
473 - highly flexible new item insertion and item editing;
474 - moving items between categories, storing done items in their category or in
475 archive files, undoing or unarchiving done items;
476 - reprioritizing items by inputting a numerical priority;
477 - extensive customizability of operation and display, including numerous faces.
478 The Todo mode user manual describes all commands and most user options.
479 To support some of these features, a new file format is used, which is
480 incompatible with the old format; however, you can convert old todo and done
481 item files to the new format on initializing the first new todo file, or at any
482 later time with the provided conversion command. The old version of
483 todo-mode.el has been made obsolete and renamed otodo-mode.el.
487 *** The experimental url syntax for remote file names is withdrawn.
490 *** New connection method "adb", which allows to access Android
491 devices by the Android Debug Bridge. The variable `tramp-adb-program'
492 can be used to adapt the path of the "adb" program, if needed.
494 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
495 "scpc" and "rsyncc" are discontinued. The ssh option
496 "ControlMaster=auto" is set automatically in all ssh-based methods,
500 *** Handlers for `file-acl' and `set-file-acl' for remote machines
501 which support POSIX ACLs.
504 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
505 for remote machines which support filesystem notifications.
509 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
511 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
515 *** The commands `woman-default-faces' and `woman-monochrome-faces'
516 are obsolete. Customize the `woman-*' faces instead.
520 *** Added Eshell-Tramp module
521 External su and sudo commands are now the default; the internal,
522 Tramp-using variants can still be used by enabling the eshell-tramp
525 ** New term.el option `term-suppress-hard-newline'.
527 ** Obsolete packages:
529 *** longlines.el is obsolete; use visual-line-mode instead.
534 *** terminal.el is obsolete; use term.el instead.
536 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
541 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
544 *** The Info-edit command is obsolete. Editing Info nodes by hand
545 has not been relevant for some time.
549 *** `explicit-bash-args' now always defaults to use --noediting.
550 During initialization, Emacs no longer expends a process to decide
551 whether it is safe to use Bash's --noediting option. These days
552 --noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
555 * New Modes and Packages in Emacs 24.4
557 ** New `superword-mode' in subword.el
558 `superword-mode' overrides the default word motion commands to treat
559 symbol_words as a single word, similar to what `subword-mode' does and
560 using the same internal functions.
562 ** New nadvice.el package offering lighter-weight advice facilities.
564 - add-function/remove-function which can be used to add/remove code on any
565 function-carrying place, such as process-filters or `<foo>-function' hooks.
566 - advice-add/advice-remove to add/remove a piece of advice on a named function,
567 much like `defadvice' does.
569 ** New frameset.el package.
570 It provides a set of operations to save a frameset (the state of all
571 or a subset of the existing frames and windows, somewhat similar to a
572 frame configuration), both in-session and persistently, and restore it
573 at some point in the future.
576 ** The package filenotify.el provides an interface for file system
577 notifications. It requires, that Emacs is compiled with one of the
578 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
581 * Incompatible Lisp Changes in Emacs 24.4
583 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
585 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
586 Some languages match those as »...« and others as «...» so better stay neutral.
588 ** The default file coding for Emacs Lisp files is now utf-8.
589 (See file-coding-system-alist.) In most cases, this change is transparent, but
590 files that contain unusual characters without specifying an explicit coding
591 system may fail to load with obscure errors.
592 You should either convert them to utf-8 or add an explicit `coding:' cookie.
594 ** overriding-terminal-local-map does not replace the local keymaps any more.
595 It used to disable the minor mode, major mode, and text-property keymaps,
596 whereas now it simply has higher precedence.
598 ** Default process filters and sentinels are not nil any more.
599 Instead they default to a function which does what the nil value used to do.
601 ** `read-event' does not return decoded chars in ttys any more.
602 Just as was the case in Emacs-22 and before, decoding of tty input according to
603 keyboard-coding-system is not performed in read-event any more. But contrary
604 to that past, it is still done before input-decode-map/function-key-map/...
606 ** Removed inhibit-local-menu-bar-menus.
608 ** frame-local variables that affect redisplay do not work any more.
609 More specifically, the redisplay does not bother to check for a frame-local
610 value when looking up variables.
612 ** nil and "unbound" are indistinguishable in symbol-function.
613 `symbol-function' never signals `void-function' any more.
614 `fboundp' returns non-nil if the symbol was `fset' to nil.
616 ** `defadvice' does not honor the `freeze' flag and cannot advise
617 special-forms any more.
619 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
620 VAR was bound to nil which was not tremendously useful and just lead to
621 spurious warnings about an unused var.
623 ** The return value of `backup-buffer' has changed.
624 The second argument is no longer an SELinux context, instead it is an
625 alist of extended attributes as returned by the new function
626 `file-extended-attributes'. The attributes can be applied to another
627 file using `set-file-extended-attributes'.
629 ** `visited-file-modtime' now returns -1 for nonexistent files.
630 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
631 in the presence of files with negative time stamps.
633 ** The cars of the elements in `interpreter-mode-alist' are now treated
634 as regexps rather than literal strings. Technically this is an
635 incompatible change, but unless you are using interpreter-mode-alist
636 for something (not just adding elements to it), it ought not to affect you.
639 * Lisp Changes in Emacs 24.4
641 ** New bool-vector set operation functions:
642 *** `bool-vector-exclusive-or'
643 *** `bool-vector-union'
644 *** `bool-vector-intersection'
645 *** `bool-vector-set-difference'
646 *** `bool-vector-not'
647 *** `bool-vector-subset'
648 *** `bool-vector-count-matches'
649 *** `bool-vector-count-matches-at'
651 ** Comparison functions =, <, >, <=, >= now take many arguments.
653 ** The second argument of `eval' can now be a lexical-environment.
655 ** `with-demoted-errors' takes an additional argument `format'.
657 ** New function `define-error'.
659 ** New hook `tty-setup-hook'.
662 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
664 ** Obsoleted functions:
667 *** `lisp-complete-symbol'
669 *** `minibuffer-completion-contents'
670 *** `isearch-nonincremental-exit-minibuffer'
671 *** `isearch-filter-visible'
672 *** `generic-make-keywords-list'
674 ** `with-wrapper-hook' is obsoleted by `add-function'.
675 The few hooks that used with-wrapper-hook are replaced as follows:
676 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
677 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
678 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
680 ** `split-string' now takes an optional argument TRIM.
681 The value, if non-nil, is a regexp that specifies what to trim from
682 the start and end of each substring.
684 ** `get-upcase-table' is obsoleted by the new `case-table-get-table'.
686 ** Support for filesystem notifications.
687 Emacs now supports notifications of filesystem changes, such as
688 creation, modification, and deletion of files. This requires the
689 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
690 MS-Windows systems, this is supported for Windows XP and newer
693 ** Changes in autorevert.el
696 *** If Emacs is compiled with file notification support, notifications
697 are used instead of checking the time stamp of the files. You can
698 disable this by setting the user option `auto-revert-use-notify' to
699 nil. Alternatively, a regular expression of directories to be
700 excluded from file notifications can be specified by
701 `auto-revert-notify-exclude-dir-regexp'.
704 *** The new user option `auto-revert-remote-files' enables reversion
705 of remote files when set to non-nil.
709 *** The function `face-spec-set' is now analogous to `setq' for face specs.
710 Its third arg now accepts values specifying exactly which face spec to
711 set (defface, custom, or user spec), and it directly sets the relevant
712 property using the supplied face spec.
714 *** Face specs set via Custom themes now replace the `defface' spec
715 rather than inheriting from it (as do face specs set via Customize).
717 *** New face characteristic (supports :underline (:style wave))
718 specifies whether or not the terminal can display a wavy line.
723 *** `image-animated-p' is now `image-multi-frame-p'.
724 It returns non-nil for any image that contains multiple frames,
725 whether or not it specifies a frame delay.
728 *** When animating images that do not specify a frame delay,
729 Emacs uses `image-default-frame-delay'.
732 *** New functions `image-current-frame' and `image-show-frame' for getting
733 and setting the current frame of a multi-frame image.
735 *** You can change the speed of animated images.
737 ** Changes in encoding and decoding of text
740 *** New coding-system `prefer-utf-8'.
741 This is like `undecided' but prefers UTF-8 on decoding if the text to
742 be decoded does not contain any invalid UTF-8 sequences. On encoding,
743 any non-ASCII characters are automatically encoded as UTF-8.
746 *** New attributes of coding-systems whose type is `undecided'.
747 Two new attributes, `:inhibit-null-byte-detection' and
748 `:inhibit-iso-escape-detection', determine how to detect encoding of
749 text that includes null bytes and ISO-2022 escape sequences,
750 respectively. Each of these attributes can be either nil, zero, or
751 t. If it is t, decoding text ignores null bytes and, respectively,
752 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
753 with no-conversion and ISO-2022 sequences cause Emacs to assume the
754 text is encoded in one of the ISO-2022 encodings, such as
755 iso-2022-7bit. If the value is zero, Emacs consults the variables
756 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
758 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
759 UTF-8 encoding and decoding, whenever possible.
761 These attributes are only meaningful for coding-systems of type
762 `undecided'. (The type of a coding-system is determined by its
763 `:coding-type' attribute and can be accessed by calling the
764 `coding-system-type' function.)
766 ** The function `set-visited-file-modtime' now accepts a 0 or -1 argument
767 with the same interpretation as the returned value of `visited-file-modtime'.
769 ** time-to-seconds is not obsolete any more.
770 ** New functions special-form-p and macrop.
771 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
772 text-property on the first char.
774 ** The `defalias-fset-function' property lets you catch calls to defalias
775 and redirect them to your own function instead of `fset'.
777 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
778 When you edit DIR/FILE, Emacs normally creates a symbolic link
779 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
780 is being edited. Formerly, if there was already a non-symlink file
781 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
782 through DIR/.#FILE.9. These fallbacks have been removed, so that
783 Emacs now no longer locks DIR/FILE in that case.
785 On file systems that do not support symbolic links, the lock is now a
786 regular file with contents being what would have been in the symlink.
788 ** The 9th element returned by `file-attributes' is now unspecified.
789 Formerly, it was t if the file's gid would change if file were deleted
790 and recreated. This value has been inaccurate for years on many
791 platforms, and nobody seems to have noticed or cared.
793 ** The function `file-ownership-preserved-p' now has an optional
794 argument GROUP which causes it check for file group too. This can be
795 used in place of the 9th element of `file-attributes'.
797 ** New functions `group-gid' and `group-real-gid'.
799 ** The 6th argument to `copy-file' has been renamed to
800 `preserve-extended-attributes' as it now handles both SELinux context
803 ** The `common-substring' argument of display-completion-list is obsolete.
804 Either use `completion-all-completions' which already returns highlighted
805 strings (including for partial or substring completion) or call
806 `completion-hilit-commonality' to add the highlight.
808 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
810 *** The package descriptor and name of global variables, constants,
811 and functions should be separated by two hyphens if the symbol is not
812 meant to be used by other packages.
815 * Changes in Emacs 24.4 on Non-Free Operating Systems
817 ** The procedure for building Emacs on MS-Windows has changed.
818 It is now built by running the same configure script as on all other
819 platforms. This requires the MSYS environment and MinGW development
820 tools. See the updated instructions in nt/INSTALL for details.
822 Using the Posix configure script and Makefile's also means a change in
823 the directory structure of the Emacs installation on Windows. It is
824 now the same as on GNU and Unix systems. In particular, the auxiliary
825 programs, such as cmdproxy.exe and hexl.exe, are in
826 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
827 version), version-independent site-lisp is in share/emacs/site-lisp,
828 version-specific Lisp files are in share/emacs/VERSION/lisp and in
829 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
830 files are in share/emacs/VERSION/etc. (Emacs knows about all these
831 directories and will find the files in there automatically; there's no
832 need to set any variables due to this change.)
835 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
836 The backtrace is written to the 'emacs_backtrace.txt' file in the
837 directory where Emacs was running.
840 ** The variable `buffer-file-type' is no longer supported.
841 Setting it has no effect, and %t in the mode-line format is ignored.
842 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
843 modifying it has no effect.
846 ** Lock files now work on MS-Windows.
847 This allows to avoid losing your edits if the same file is being
848 edited in another Emacs session or by another user. See the node
849 "Interlocking" in the Emacs User Manual for the details. To disable
850 file locking, customize `create-lockfiles' to nil.
852 ** Improved fullscreen support on Mac OS X.
853 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
854 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
855 native is the default.
858 * Installation Changes in Emacs 24.3
860 ** The default X toolkit is now Gtk+ version 3.
861 If you don't pass `--with-x-toolkit' to configure, or if you use
862 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
863 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
864 You can explicitly require a specific version by passing
865 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
867 ** New configure option `--enable-link-time-optimization', to utilize
868 an appropriate feature provided by GCC since version 4.5.0.
870 ** New configure option `--without-all' to disable most of the optional
871 features (image support, etc.) that are normally enabled by default.
873 ** New configure option `--enable-gcc-warnings' (for developing/debugging
874 Emacs). If building with GCC, this enables compile-time checks that
875 warn/give errors about possibly-questionable C code. On a recent GNU
876 system there should be no warnings; on older and on non-GNU systems
877 the results may be useful to developers.
879 ** The configure option `--enable-use-lisp-union-type' has been
880 renamed to `--enable-check-lisp-object-type', as the resulting
881 Lisp_Object type no longer uses a union to implement the compile time
882 check that this option enables.
884 ** The configure option `--disable-maintainer-mode' has been removed,
885 as it was confusingly-named and rarely useful.
887 ** The configure options `--program-prefix', `--program-suffix', and
888 `--program-transform-name' apply to more than just the installed
889 binaries. Now they also affect the man pages, icons, and the
890 etc/emacs.desktop file; but not the info pages, since this would break
891 links between the various manuals.
893 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
894 overwriting "emacs" in the installation bin/ directory with a link
897 ** Emacs uses libtinfo in preference to libncurses, if available.
899 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
900 /usr/pkg/lib to the linker search path. You must add them yourself if
903 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
904 (from the bin and libexec directories, respectively). The former is
905 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
908 * Startup Changes in Emacs 24.3
910 ** Emacs no longer searches for `leim-list.el' files beneath the standard
911 lisp/ directory. There should not be any there anyway. If you have
912 been adding them there, put them somewhere else; e.g., site-lisp.
914 ** The `--no-site-lisp' command line option now works for Nextstep builds.
917 * Changes in Emacs 24.3
921 *** `C-h f' (`describe-function') can now perform autoloading.
922 When this command is called for an autoloaded function whose docstring
923 contains a key substitution construct, that function's library is
924 automatically loaded, so that the documentation can be shown
925 correctly. To disable this, set `help-enable-auto-load' to nil.
927 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
928 even after their associated libraries have been loaded (and the
929 autoloads have been redefined as functions).
933 *** Images displayed via ImageMagick now support transparency and the
934 :background image specification property.
936 *** When available, ImageMagick support is automatically enabled.
937 It is no longer necessary to call `imagemagick-register-types'
938 explicitly to install ImageMagick image types; that function is called
939 automatically at startup, or when customizing an imagemagick- option.
941 *** Setting `imagemagick-types-inhibit' to t now disables the use of
942 ImageMagick to view images. (You must call `imagemagick-register-types'
943 afterwards if you do not use customize to change this.)
945 *** The new variable `imagemagick-enabled-types' also affects which
946 ImageMagick types are treated as images. The function
947 `imagemagick-filter-types' returns the list of types that will be
950 *** ImageMagick images now support the :max-width and :max-height
953 *** Some data types aren't auto-detected by ImageMagick. Adding
954 :format to `create-image' may help if the content type is in the
955 new variable `image-format-suffixes'.
959 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
960 next and previous path separator, respectively.
962 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
963 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
964 non-nil before enabling the mode.
968 *** New option `mode-line-default-help-echo' specifies the help text
969 (shown in a tooltip or in the echo area) for any part of the mode line
970 that does not have its own specialized help text.
972 *** You can now click mouse-3 in the coding system indicator to invoke
973 `set-buffer-file-coding-system'.
977 *** emacsclient now obeys string values for `initial-buffer-choice',
978 if it is told to open a new frame without specifying any file to visit
979 or expression to evaluate.
981 *** New option `server-auth-key' specifies a shared server key.
983 ** Emacs now generates backtraces on fatal errors.
984 On encountering a fatal error, Emacs now outputs a textual description
985 of the fatal signal, and a short backtrace on platforms like glibc
986 that support backtraces.
988 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
989 This minor mode replaces `toggle-read-only', which is now obsolete.
991 ** Most `y-or-n' prompts now allow you to scroll the selected window.
992 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
993 respectively, without exiting from the prompt.
995 ** In the Package Menu, newly-available packages are listed as "new",
996 and sorted above the other "available" packages by default.
998 ** If your Emacs was built from a bzr checkout, the new variable
999 `emacs-bzr-version' contains information about the bzr revision used.
1001 ** New option `create-lockfiles' specifies usage of lockfiles.
1002 It defaults to t. Changing it to nil inhibits the creation of lock
1003 files (use this with caution).
1005 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1006 variables on remote hosts.
1008 ** The entry for PCL-CVS has been removed from the Tools menu.
1009 The PCL-CVS commands are still available via the keyboard.
1011 ** Using "unibyte: t" in Lisp source files is obsolete.
1012 Use "coding: raw-text" instead.
1014 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1015 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1016 The previous binding, introduced in Emacs 24.1, was a mistake, because
1017 `C-c LETTER' bindings are reserved for user customizations.
1019 ** Internationalization
1021 *** New language environment: Persian.
1023 *** New input method `vietnamese-vni'.
1025 ** Nextstep (GNUstep / Mac OS X) port
1027 *** Support for fullscreen and the frame parameter fullscreen.
1029 *** A file dialog is used for open/save operations initiated from the
1033 * Editing Changes in Emacs 24.3
1035 ** Search and Replace
1037 *** Non-regexp Isearch now performs "lax" space matching.
1038 Each sequence of spaces in the supplied search string may match any
1039 sequence of one or more whitespace characters, as specified by the
1040 variable `search-whitespace-regexp'. (This variable is also used by a
1041 similar existing feature for regexp Isearch.)
1043 *** New Isearch command `M-s SPC' toggles lax space matching.
1044 This applies to both ordinary and regexp Isearch.
1046 *** New option `replace-lax-whitespace'.
1047 If non-nil, `query-replace' uses flexible whitespace matching too.
1050 *** Global `M-s _' starts a symbol (identifier) incremental search,
1051 and `M-s _' in Isearch toggles symbol search mode.
1052 `M-s c' in Isearch toggles search case-sensitivity.
1054 ** Navigation commands
1056 *** New binding `M-g c' for `goto-char'.
1058 *** New binding `M-g TAB' for `move-to-column'.
1060 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1061 interactively with no prefix arg. Previously, it moved to column 1.
1063 ** New option `yank-handled-properties' allows processing of text
1064 properties on yanked text, in ways that are more general than just
1065 removing them (as is done by `yank-excluded-properties').
1067 ** New option `delete-trailing-lines' specifies whether
1068 M-x delete-trailing-whitespace should delete trailing lines at the end
1069 of the buffer. It defaults to t.
1071 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1073 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1074 `ucs-insert' is now an obsolete alias for `insert-char'.
1076 ** The `z' key no longer has a binding in most special modes.
1077 It used to be bound to `kill-this-buffer', but `z' is too easy to
1080 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1081 It copies the region-rectangle as the last rectangle kill.
1085 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1087 *** New option `register-separator' specifies the register containing
1088 the text to put between collected texts for use with
1089 M-x append-to-register and M-x prepend-to-register.
1092 * Changes in Specialized Modes and Packages in Emacs 24.3
1094 ** Common Lisp emulation (CL)
1096 *** CL's main entry is now (require 'cl-lib).
1097 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1098 i.e., all its definitions have the "cl-" prefix (and internal definitions
1099 use the "cl--" prefix).
1101 If `cl' provided a feature under the name `foo', then `cl-lib'
1102 provides it under the name `cl-foo' instead; with the exceptions of the
1103 few `cl' definitions that had to use `foo*' to avoid conflicts with
1104 pre-existing Elisp entities. These have been renamed to `cl-foo'
1105 rather than `cl-foo*'.
1107 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1108 provide the old, non-prefixed names. Some exceptions are listed below:
1110 *** `cl-flet' is not like `flet' (which is deprecated).
1111 Instead it obeys the behavior of Common-Lisp's `flet'.
1112 In particular, in cl-flet function definitions are lexically scoped,
1113 whereas in flet the scoping is dynamic.
1115 *** `cl-labels' is slightly different from `labels'.
1116 The difference is that it relies on the `lexical-binding' machinery
1117 (as opposed to the `lexical-let' machinery used previously) to capture
1118 definitions in closures, so such closures will only work if `lexical-binding'
1121 *** `cl-letf' is not exactly like `letf'.
1122 The only difference is in details that relate to some deprecated usage
1123 of `symbol-function' in place forms.
1125 *** `progv' was rewritten to use the `let' machinery.
1126 A side effect is that variables without corresponding values are bound
1127 to nil rather than being made unbound.
1129 *** The following methods of extending `setf' are obsolete
1130 (use features from gv.el instead):
1131 `define-modify-macro' (use `gv-letplace')
1132 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1133 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1134 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1138 *** Changes are now highlighted using the same color scheme as in
1139 modern VCSes. Deletions are displayed in red (new faces
1140 `diff-refine-removed' and `smerge-refined-removed', and new definition
1141 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1142 and `smerge-refined-added', and new definition of `diff-added').
1144 *** The variable `diff-use-changed-face' defines whether to use the
1145 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1146 changes in context diffs.
1148 *** The new command `diff-delete-trailing-whitespace' removes trailing
1149 whitespace introduced by a diff.
1151 ** Ediff now uses the same color scheme as Diff mode.
1155 A new version of python.el, which provides several new features, including:
1156 per-buffer shells, better indentation, Python 3 support, and improved
1157 shell-interaction compatible with iPython (and virtually any other
1160 *** Some user options have been replaced/renamed, including (old -> new):
1161 **** python-indent -> python-indent-offset
1162 **** python-guess-indent -> python-indent-guess-indent-offset
1163 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1164 **** python-use-skeletons -> python-skeleton-autoinsert
1166 *** Some user options have been removed, including:
1168 **** `python-indent-string-contents': Strings are never indented.
1170 **** `python-honour-comment-indentation':
1171 Comments are always considered as indentation markers.
1173 **** `python-continuation-offset': Indentation is automatically
1174 calculated in a pep8 compliant way depending on the context.
1176 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1177 Have no direct mapping as the shell interaction is completely different.
1179 **** `python-python-command', `python-jython-command':
1180 Replaced by `python-shell-interpreter'.
1182 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1183 `python-pdbtrack-minor-mode-string', `python-source-modes':
1186 *** Some commands have been replaced (old -> new):
1187 **** python-insert-class -> python-skeleton-class
1188 **** python-insert-def -> python-skeleton-def
1189 **** python-insert-for -> python-skeleton-for
1190 **** python-insert-if -> python-skeleton-if
1191 **** python-insert-try/except -> python-skeleton-try
1192 **** python-insert-try/finally -> python-skeleton-try
1193 **** python-insert-while -> python-skeleton-while
1194 **** python-find-function -> python-nav-jump-to-defun
1195 **** python-next-statement -> python-nav-forward-sentence
1196 **** python-previous-statement -> python-nav-backward-sentence
1197 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1198 **** python-end-of-defun-function -> python-nav-end-of-defun
1199 **** python-send-buffer -> python-shell-send-buffer
1200 **** python-send-defun -> python-shell-send-defun
1201 **** python-send-region -> python-shell-send-region
1202 **** python-send-region-and-go -> emulate with python-shell-send-region
1203 and python-shell-switch-to-shell
1204 **** python-send-string -> python-shell-send-string
1205 **** python-switch-to-python -> python-shell-switch-to-shell
1206 **** python-describe-symbol -> python-eldoc-at-point
1210 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1212 *** The D-Bus object manager interface is implemented.
1214 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1215 if their value does not fit into Emacs's integer range.
1217 *** The function `dbus-call-method' is now non-blocking.
1218 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1220 *** Signals can also be sent as unicast messages.
1222 *** The argument list of `dbus-register-signal' has been extended,
1223 according to the new match rule types of D-Bus.
1225 *** `dbus-init-bus' supports private connections.
1227 *** There is a new function `dbus-setenv'.
1229 ** `desktop-path' no longer includes the "." directory.
1230 Desktop files are now located in ~/.emacs.d by default.
1234 *** `dired-do-async-shell-command' executes each file sequentially
1235 if the command ends in `;' (when operating on multiple files).
1236 Otherwise, it executes the command on each file in parallel.
1238 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1239 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1242 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1243 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1244 mark/unmark/flag all files in the active region.
1246 *** The minibuffer default for `=' (`dired-diff') has changed.
1247 It is now the backup file for the file at point, if one exists.
1248 In Transient Mark mode the default is the file at the active mark.
1250 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1251 The global binding for `M-=', `count-words-region' is in effect.
1255 *** New module "notifications", which can send a notification when you
1256 receive a private message or your nickname is mentioned.
1258 *** ERC will look up server/channel names via auth-source and use any
1261 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1262 only applies to messages sent by lurkers.
1264 ** reStructuredText mode
1266 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1267 fontification, comment handling, and customization have all been revised
1270 *** Support for `imenu' and `which-function-mode'.
1272 *** The reStructuredText syntax is more closely covered.
1273 Sphinx support has been improved.
1275 *** `rst-insert-list' inserts new list or continues existing lists.
1277 *** A negative prefix argument always works for `rst-adjust'.
1279 *** The window configuration is reset after displaying a TOC.
1281 *** The constant `rst-version' describes the rst.el package version.
1285 *** Support for percent literals and recognition of regular expressions
1286 in method calls without parentheses with more methods, including Cucumber
1289 *** Improved syntax highlighting and indentation.
1291 *** New command `ruby-toggle-block', bound to `C-c {'.
1293 *** Some non-standard keybindings/commands have been removed:
1295 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1297 **** `ruby-mark-defun'; use `mark-defun'.
1299 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1300 appropriate settings for the variables `beginning-of-defun-function'
1301 and `end-of-defun-function'.
1303 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1304 `reindent-then-newline-and-indent' and `newline' have been removed.
1306 ** Shell Script mode
1308 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1310 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1312 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1316 *** The free software compiler GHDL is supported (and now the default).
1318 *** Support for the VHDL-AMS packages has been added/updated.
1320 *** Updated to the 2002 revision of the VHDL standard.
1322 *** Accepts \r and \f as whitespace.
1326 *** The faces used by Apropos are now directly customizable.
1327 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1328 see the `apropos' Custom group for details.
1330 *** The old options whose values specified faces to use have been removed
1331 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1335 *** This package has been rewritten to use Tabulated List mode.
1337 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1338 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1342 *** Algebraic simplification mode is now the default.
1343 To restrict to the limited simplifications given by the former
1344 default simplification mode, use `m I'.
1348 *** You can customize the header text that appears above each calendar month.
1349 See the variable `calendar-month-header'.
1351 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1353 *** The calendars produced by cal-html include holidays.
1354 Customize `cal-html-holidays' to change this.
1358 *** The major modes from the parser generators "Bovine" and "Wisent"
1359 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1360 are in `auto-mode-alist', and the corresponding manuals are included.
1364 **** Menu support for the "Configuration" feature. This allows users to
1365 choose the active configuration (such as debug or install) from the menu.
1367 **** New command `ede-set' to interactively set project-local variables.
1369 **** Support for compiling, debugging, and running in "generic" projects.
1371 **** Autoconf editing support for M4 macros with complex arguments.
1373 **** Compilation support for the "linux" project type.
1375 **** "simple" projects have been removed; use "generic" projects instead.
1379 **** Support for parsing #include statements inside a namespace in C/C++.
1381 **** Improved support for 'extern "C"' declarations in C/C++.
1383 **** The ability to ignore more common special C/C++ preprocessor symbols,
1384 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1385 If available, include cdefs.h as an additional source of preprocessor symbols.
1387 **** Improved C/C++ function pointer parsing.
1389 **** In Python, support for converting imports to include file names.
1391 **** Ability to dynamically determine the Python load path.
1393 **** Support for the Python 'WITH' and 'AT' keywords.
1395 **** Improved tooltip completion.
1399 **** The SRecode manual is now included.
1401 **** Tag generation supports constructor/destructor settings and system
1402 include differentiation.
1404 **** Addition of 'Framework' support: Frameworks are specified when a
1405 particular kind of library (such as Android) is needed in a common language
1408 **** Support for nested templates and let variables override based on priority.
1410 **** Support for merging tables from multiple related modes, such as
1411 default -> c++ -> arduino.
1413 ** Compile has a new option `compilation-always-kill'.
1417 *** `custom-reset-button-menu' now defaults to t.
1419 *** Non-option variables are never matched in `customize-apropos' and
1420 `customize-apropos-options' (i.e., the prefix argument does nothing for
1421 these commands now).
1425 *** The variables `term-default-fg-color' and `term-default-bg-color'
1426 are now deprecated in favor of the customizable face `term'.
1428 *** You can customize how to display ANSI terminal colors and styles
1429 by customizing the corresponding `term-color-<COLOR>',
1430 `term-color-underline' and `term-color-bold' faces.
1434 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1436 *** Remote processes are now also supported on remote MS-Windows hosts.
1440 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1441 Previously, this slot stored semicolon-separated attribute-value pairs
1442 appended to some imap URLs, but this is not compatible with RFC 3986.
1443 So now the `filename' slot stores the entire path and query components,
1444 and the `attributes' slot is always nil.
1446 *** New function `url-encode-url' for encoding a URI string.
1447 The `url-retrieve' function now uses this to encode its URL argument,
1448 in case that is not properly encoded.
1450 *** New command `url-cookie-list' displays all the current cookies, and
1451 allows deleting selected cookies.
1453 ** notifications.el supports now version 1.2 of the Notifications API.
1454 The function `notifications-get-capabilities' returns the supported
1457 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1458 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1459 `flymake-warning-bitmap'.
1461 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1462 specifying URL types that should be converted to remote file names at
1463 the FFAP prompt. The default is now '("ftp").
1465 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1466 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1468 ** New option `mouse-avoidance-banish-position' specifies where the
1469 `banish' mouse avoidance setting moves the mouse.
1471 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1472 closing brackets to be aligned with the line of the opening bracket.
1474 ** In Proced mode, new command `proced-renice' renices marked processes.
1476 ** New option `async-shell-command-buffer' specifies the buffer to use
1477 for a new asynchronous `shell-command' when the default output buffer
1478 `*Async Shell Command*' is already in use.
1480 ** SQL mode has a new option `sql-db2-escape-newlines'.
1481 If non-nil, newlines sent to the command interpreter will be escaped
1482 by a backslash. The default does not escape the newlines and assumes
1483 that the sql statement will be terminated by a semicolon.
1485 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1486 (and modes that derive from it), sorts the column at point, or the Nth
1487 column if a numeric prefix argument is given.
1489 ** `which-func-modes' now defaults to t, so Which Function mode, when
1490 enabled, applies to all applicable major modes.
1492 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1495 ** Follow mode no longer works by using advice.
1496 The option `follow-intercept-processes' has been removed.
1498 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1500 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1501 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1502 *** semantic-change-hooks -> semantic-change-functions
1503 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1504 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1505 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1506 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1507 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1508 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1509 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1510 *** rcirc-activity-hooks -> rcirc-activity-functions
1511 *** rcirc-print-hooks -> rcirc-print-functions
1512 *** dbus-event-error-hooks -> dbus-event-error-functions
1513 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1514 *** checkdoc-style-hooks -> checkdoc-style-functions
1515 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1516 *** archive-extract-hooks -> archive-extract-hook
1517 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1518 *** hfy-post-html-hooks -> hfy-post-html-hook
1519 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1520 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1521 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1522 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1524 ** Obsolete packages
1527 In most cases, assoc+member+push+delq work just as well.
1528 And in any case it's just a terrible package: ugly semantics, terrible
1529 inefficiency, and not namespace-clean.
1538 * Incompatible Lisp Changes in Emacs 24.3
1540 ** Docstrings starting with `*' no longer indicate user options.
1541 Only variables defined using `defcustom' are considered user options.
1542 The function `user-variable-p' is now an obsolete alias for
1543 `custom-variable-p'.
1545 ** The return values of `defalias', `defun' and `defmacro' have changed,
1546 and are now undefined. For backwards compatibility, `defun' and
1547 `defmacro' currently return the name of the newly defined
1548 function/macro, but this should not be relied upon.
1550 ** `random' by default now returns a different random sequence in
1551 every Emacs run. Use `(random S)', where S is a string, to set the
1552 random seed to a value based on S, in order to get a repeatable
1553 sequence in later calls.
1555 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1556 that substring is inserted literally even if the LITERAL arg is
1557 non-nil, instead of causing an error to be signaled.
1559 ** `select-window' now always makes the window's buffer current.
1560 It does so even if the window was selected before.
1562 ** The function `x-select-font' can return a font spec, instead of a
1563 font name as a string. Whether it returns a font spec or a font name
1564 depends on the graphical library.
1566 ** `face-spec-set' no longer sets frame-specific attributes when the
1567 third argument is a frame (that usage was obsolete since Emacs 22.2).
1569 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1571 ** The CL package's `get-setf-method' function no longer exists.
1572 Generalized variables are now part of core Emacs Lisp, and implemented
1573 differently to the way cl.el used to do it. It is not possible to
1574 define a compatible replacement for `get-setf-method'. See the file
1575 gv.el for internal details of the new implementation.
1577 ** The arguments of `dbus-register-signal' are no longer just strings,
1578 but keywords or keyword-string pairs. The old argument list will
1579 still be supported for Emacs 24.x.
1581 ** Miscellaneous name changes
1582 Some Lisp symbols have been renamed to correct their spelling,
1583 or to be more consistent with standard Emacs terminology.
1585 *** Renamed functions
1586 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1587 **** inactivate-input-method -> deactivate-input-method
1588 **** quail-inactivate -> quail-deactivate
1589 **** robin-inactivate -> robin-deactivate
1590 **** viper-inactivate-input-method -> viper-deactivate-input-method
1591 **** viper-inactivate-input-method-action ->
1592 viper-deactivate-input-method-action
1593 **** ucs-input-inactivate -> ucs-input-deactivate
1596 The old hooks are still supported for backward compatibility, but they
1597 are deprecated and will be removed eventually.
1598 **** input-method-inactivate-hook -> input-method-deactivate-hook
1599 **** robin-inactivate-hook -> robin-deactivate-hook
1600 **** quail-inactivate-hook -> quail-deactivate-hook
1602 *** Renamed variables
1603 **** follow-deactive-menu -> follow-inactive-menu
1604 **** inactivate-current-input-method-function ->
1605 deactivate-current-input-method-function
1607 ** Some obsolete functions, variables, and faces have been removed:
1608 *** `last-input-char', `last-command-char', `unread-command-char'
1609 *** `facemenu-unlisted-faces'
1610 *** `rmail-decode-mime-charset'
1611 *** `iswitchb-read-buffer'
1612 *** `sc-version', `sc-submit-bug-report'
1613 *** `set-char-table-default'
1614 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1615 *** `compile-internal'
1617 *** `mode-line-inverse-video'
1618 *** `follow-mode-off-hook'
1619 *** `cvs-commit-buffer-require-final-newline'
1620 (use `log-edit-require-final-newline' instead)
1621 *** `cvs-changelog-full-paragraphs'
1622 (use `log-edit-changelog-full-paragraphs' instead)
1623 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1624 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1625 *** `vc-master-templates' (use `vc-handled-backends' instead)
1626 *** `vc-checkout-carefully'
1629 * Lisp Changes in Emacs 24.3
1631 ** CL-style generalized variables are now in core Elisp.
1632 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1633 You can define your own generalized variables using `gv-define-simple-setter',
1634 `gv-define-setter', etc.
1636 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1637 This can significantly speed up execution of non-byte-compiled code,
1638 but can also bump into previously unnoticed cyclic dependencies.
1639 These are generally harmless: they will simply cause the macro calls
1640 to be left for later expansion (as before), but will result in a
1641 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1642 You may wish to restructure your code so this does not happen.
1644 ** New sampling-based Elisp profiler.
1645 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1646 When finished, use M-x profiler-stop. The sampling rate can be based on
1647 CPU time or memory allocations.
1649 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1650 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1652 ** New macros `setq-local' and `defvar-local'.
1654 ** Face underlining can now use a wave.
1656 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1657 of `read-regexp' accepts a string ending with a colon and space, and its
1658 second argument DEFAULTS can be a list of strings accessible via `M-n'
1659 in the minibuffer ahead of other hard-coded useful regexp-related values.
1660 More commands use `read-regexp' now to read their regexp arguments.
1664 *** New function `completion-table-with-quoting' to handle completion
1665 in the presence of quoting, such as file completion in shell buffers.
1667 *** New function `completion-table-subvert' to use an existing completion
1668 table, but with a different prefix.
1672 *** New error type and new function `user-error'.
1673 These do not trigger the debugger.
1675 *** New option `debugger-bury-or-kill', saying what to do with the
1676 debugger buffer when exiting debug.
1678 *** Set `debug-on-message' to enter the debugger when a certain
1679 message is displayed in the echo area. This can be useful when trying
1680 to work out which code is doing something.
1682 *** New var `inhibit-debugger', automatically set to prevent accidental
1683 recursive invocations.
1687 *** New command `fit-frame-to-buffer' adjusts the frame height to
1690 *** The command `fit-window-to-buffer' can adjust the frame height
1691 if the new option `fit-frame-to-buffer' is non-nil.
1693 *** New macro `with-temp-buffer-window', similar to
1694 `with-output-to-temp-buffer'.
1696 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1699 *** New option `switch-to-buffer-preserve-window-point' to restore a
1700 window's point when switching buffers.
1702 *** New display action alist entries `window-height' and `window-width'
1703 specify the size of new windows created by `display-buffer'.
1705 *** New display action alist entry `pop-up-frame-parameters', if
1706 non-nil, specifies frame parameters to give any newly-created frame.
1708 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1709 tells display action functions to avoid changing which frame is
1712 *** New display action alist entry `previous-window', if non-nil,
1713 specifies window to reuse in `display-buffer-in-previous-window'.
1715 *** New display action functions `display-buffer-below-selected',
1716 and `display-buffer-in-previous-window'.
1718 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1719 now accept a third argument to avoid choosing the selected window.
1721 *** Additional values recognized for option `window-combination-limit'.
1723 *** The following variables are obsolete, as they can be replaced by
1724 appropriate entries in the `display-buffer-alist' function introduced
1726 **** `dired-shrink-to-fit'
1727 **** `display-buffer-reuse-frames'
1728 **** `display-buffer-function'
1729 **** `special-display-buffer-names'
1730 **** `special-display-frame-alist'
1731 **** `special-display-function'
1732 **** `special-display-regexps'
1736 *** `current-time-string' no longer requires that its argument's year
1737 must be in the range 1000..9999. It now works with any year supported
1738 by the underlying C implementation.
1740 *** `current-time' now returns extended-format time stamps
1741 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1742 PSEC is typically a multiple of 1000 on current machines. Other
1743 functions that use this format, such as `file-attributes' and
1744 `format-time-string', have been changed accordingly. Old-format time
1745 stamps are still accepted.
1747 *** The format of timers in `timer-list' and `timer-idle-list' is now
1748 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1749 The PSECS slot is new, and uses picosecond resolution. It can be
1750 accessed via the new `timer--psecs' accessor.
1752 *** Last-modified time stamps in undo lists now are of the form
1753 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1757 *** Improved security when handling persistent objects:
1759 **** `eieio-persistent-read' now features optional arguments for specifying
1760 the class to load, as well as a flag stating whether subclasses are allowed;
1761 if provided, other classes will be rejected by the reader. For
1762 compatibility with existing code, if the class is omitted only a
1765 **** New specialized reader for pulling in classes and signaling errors
1766 without evaluation of suspicious code.
1768 **** All slots that contain objects must have a :type. Slots with lists
1769 of objects must use a new type predicate for a list of an object type.
1771 *** Support for `find-function' and similar utilities, through the addition
1772 of filename support to generated symbols.
1774 ** Floating point functions now always return special values like NaN,
1775 instead of signaling errors, if given invalid args; e.g., (log -1.0).
1776 Previously, they returned NaNs on some platforms but signaled errors
1777 on others. The affected functions are acos, asin, tan, exp, expt,
1778 log, log10, sqrt, and mod.
1780 ** New fringe bitmap `exclamation-mark'.
1782 ** Miscellaneous changes to special forms and macros
1784 *** `defun' and `defmacro' are now macros rather than special forms.
1786 *** `kbd' is now a function rather than a macro.
1788 ** Miscellaneous new functions
1790 *** `set-temporary-overlay-map' sets up a temporary keymap that
1791 takes precedence over most other maps for a short while (normally one key).
1793 *** `autoloadp' tests if its argument is an autoloaded object.
1795 *** `autoload-do-load' performs the autoloading operation.
1797 *** `buffer-narrowed-p' tests if the buffer is narrowed.
1799 *** `file-name-base' returns a file name sans directory and extension.
1801 *** `function-get' fetches a function property, following aliases.
1803 *** `posnp' tests if an object is a `posn'.
1805 *** `system-users' returns the user names on the system.
1807 *** `system-groups' returns the group names on the system.
1809 *** `tty-top-frame' returns the topmost frame of a text terminal.
1811 ** The following functions and variables are obsolete:
1812 *** `automount-dir-prefix' (use `directory-abbrev-alist')
1813 *** `buffer-has-markers-at'
1814 *** `macro-declaration-function' (use `macro-declarations-alist')
1815 *** `window-system-version' (provides no useful information)
1816 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
1817 *** `query-replace-interactive'
1818 *** `font-list-limit' (has had no effect since Emacs < 23)
1821 * Changes in Emacs 24.3 on Non-Free Operating Systems
1823 ** Cygwin builds can use the native MS Windows user interface.
1824 Pass `--with-w32' to configure. The default remains the X11 interface.
1826 ** Two new functions are available in Cygwin builds:
1827 `cygwin-convert-file-name-from-windows' and
1828 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
1829 code to access the Cygwin file-name mapping machinery to convert
1830 between Cygwin and Windows-native file and directory names.
1832 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
1833 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
1834 `mouse-autoselect-window'.
1836 ** On MS Windows Vista and later Emacs now supports symbolic links.
1838 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
1839 support for libxml2, even if its presence is detected.
1841 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1843 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
1844 directories to the search path. You must add them yourself if you want them.
1847 * Changes in Emacs 24.2
1849 ** This is mainly a bug-fix release.
1852 * Installation Changes in Emacs 24.1
1854 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1855 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1856 also depend on Gtk+. You can disable them with --without-rsvg and
1859 ** Emacs can be compiled with GnuTLS support.
1860 This happens by default if a suitably recent version of the library is
1861 found at build time. To prevent this, use the configure option
1862 `--without-gnutls'. See below for GnuTLS features.
1864 ** Emacs can be compiled with SELinux support.
1865 This happens by default if a suitably recent version of the library is
1866 found at build time. To prevent this, use the configure option
1867 `--without-selinux'. See below for SELinux features.
1869 ** Emacs can be compiled with ImageMagick support.
1870 This happens by default if a suitably recent version of the library is
1871 found at build time. To prevent this, use the configure option
1872 `--without-imagemagick'. See below for ImageMagick features.
1873 This feature is not available for the Nextstep or MS ports.
1875 ** Emacs can be compiled with libxml2 support.
1876 This happens by default if a suitably recent version of the library is
1877 found at build time. To prevent this, use the configure option
1878 `--without-xml2'. See below for libxml2 features.
1880 ** By default, the installed Info and man pages are compressed.
1881 You can disable this by configuring --without-compress-info.
1883 ** New configure option --with-wide-int.
1884 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
1885 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1888 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
1889 These provide no new functionality, they just remove the need to edit
1890 lib-src/Makefile by hand in order to use the associated features.
1892 ** New configure option --enable-use-lisp-union-type.
1893 This is only useful for Emacs developers to debug certain types of bugs.
1894 This is not a new feature; only the configure flag is new.
1896 ** The standalone programs digest-doc and sorted-doc are removed.
1897 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1899 ** The standalone program `fakemail' is removed.
1900 If you need it, feedmail.el provides a superset of the functionality.
1903 * Startup Changes in Emacs 24.1
1905 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1906 command line arguments, and the EMACS_UNIBYTE environment variable, no
1907 longer have any effect. (They were declared obsolete in Emacs 23.)
1909 ** New command line option `--no-site-lisp' removes site-lisp directories
1910 from load-path. -Q now implies this. This option does not affect the
1911 EMACSLOADPATH environment variable (and hence has no effect for
1915 * Changes in Emacs 24.1
1919 *** Many packages now use the `completion-at-point' command,
1920 rather than implementing separate completion commands.
1922 *** `completion-at-point' now handles tags and semantic completion.
1924 *** Completion in a non-minibuffer now tries to detect the end of completion
1925 and pops down the *Completions* buffer accordingly.
1927 *** New option `completion-cycle-threshold' allows completion cycling.
1929 *** New option `completion-category-overrides' for overriding the
1930 default completion style in certain circumstances.
1932 *** New completion style `substring'.
1934 *** Completion of buffer names uses `substring' completion by default.
1936 *** The option `widget-complete-field' has been removed.
1940 *** The first time you try sending mail, Emacs asks for a mail method.
1941 This is implemented by a new default for `send-mail-function', which
1942 is `sendmail-query-once'. This offers to use the smtpmail package, or
1943 to use the old defaults relying on external mail facilities
1944 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
1945 `mailclient-send-it' on Windows).
1947 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
1948 transfers the report to your desktop's preferred mail client, if there
1949 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
1952 *** See Changes in Specialized Modes and Packages for SMTPmail changes
1953 and Mail mode changes
1955 ** Emacs server and client changes
1957 *** New option `server-port' specifies the port for TCP Emacs servers.
1959 *** New emacsclient argument -q/--quiet suppresses some status messages.
1961 *** New emacsclient argument --frame-parameters specifies the frame
1962 parameters of any newly-created graphical frame.
1964 *** If emacsclient shuts down due to Emacs signaling an error,
1965 its exit status is 1.
1967 *** New emacsclient argument --parent-id ID.
1968 This opens a client frame in parent X window ID, via XEmbed, similar
1969 to the --parent-id argument to Emacs.
1971 ** Internationalization changes
1973 *** Emacs now supports display and editing of bidirectional text.
1974 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1975 displayed in the correct visual order as expected by users of those
1976 scripts. The display reordering is a "full bidirectionality" class
1977 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1978 with no RTL text should look exactly the same as before.
1980 **** New buffer-local variable `bidi-display-reordering'.
1981 To disable display reordering in a buffer, change this to nil.
1983 **** New buffer-local variable `bidi-paragraph-direction'.
1984 If nil (the default), Emacs determines the base direction of each
1985 paragraph from its text, as specified by the UBA. Setting the value
1986 to `right-to-left' or `left-to-right' forces a base direction on each
1989 Paragraphs with right-to-left base direction are displayed starting at
1990 the right window edge.
1992 *** Enhanced support for characters with no glyphs in available fonts,
1993 or, on text terminals, characters that cannot be encoded by the
1994 terminal coding system. The new option `glyphless-char-display-control'
1995 specifies how to display them: as a hexadecimal code in a box, a thin
1996 1-pixel space, an empty box, etc.
1998 *** New input methods for Farsi and Bulgarian
1999 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2001 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2002 (U+2010 and U+2011).
2004 *** New Hebrew translation of the Emacs Tutorial.
2005 Type `C-u C-h t' to choose it in case your language setup doesn't
2006 automatically select it.
2008 ** An Emacs Lisp package manager is now included.
2009 This is a convenient way to download and install additional packages,
2010 from a package repository at http://elpa.gnu.org.
2012 *** M-x list-packages shows a list of packages, which can be
2013 selected for installation.
2015 *** New command `describe-package', bound to `C-h P'.
2017 *** By default, all installed packages are loaded automatically when
2018 Emacs starts up. To disable this, set `package-enable-at-startup' to
2019 nil. To specify the packages to load, customize `package-load-list'.
2021 ** Custom theme changes
2023 *** New command `M-x customize-themes', which provides a convenient
2024 interface for enabling and disabling Custom themes.
2026 *** New option `custom-theme-load-path' is the load path for themes.
2027 Emacs no longer looks for Custom themes in `load-path'. The default
2028 value of `custom-theme-load-path' says to look for themes in
2029 `custom-theme-directory', followed by a subdirectory of
2030 `data-directory' named "themes/", which contains a small selection of
2031 built-in Custom themes.
2033 *** New option `custom-safe-themes' records known-safe theme files.
2034 If a theme is not in this list, Emacs queries before loading it, and
2035 offers to save the theme to `custom-safe-themes' automatically. By
2036 default, all themes included in Emacs are treated as safe.
2038 ** Improved GTK integration
2040 *** GTK scroll-bars are now placed on the right by default.
2041 The function `set-scroll-bar-mode' can change this.
2043 *** GTK tool bars can have just text, just images or images and text.
2044 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2045 the default is taken from desktop settings.
2047 *** GTK tool bars can be placed on any edge of the frame.
2048 The frame-parameter tool-bar-position controls this. It takes the
2049 values top, left, right or bottom. The Options => Show/Hide menu has
2052 *** The default colors for selected text (the `region' face) are taken
2053 from the GTK theme when Emacs is built with GTK.
2055 *** Emacs uses GTK tooltips by default if built with GTK.
2056 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2058 ** Graphical interface changes
2060 *** On graphical displays, the mode-line no longer ends in dashes.
2061 Also, the first dash (which does not indicate anything) is just
2062 displayed as a space.
2064 *** `menu-bar-select-buffer-function' lets you choose another operation
2065 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2067 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2068 built with Xft. These fonts can be set via X resources, for example:
2069 Emacs.pane.menubar.font: Courier-12
2073 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2074 or if it receives a SIGINT signal in batch mode.
2076 *** `kill-emacs-hook' is now also run in batch mode.
2077 Third-party code which adds to `kill-emacs-hook' should check if they
2078 do the right thing in batch mode.
2080 ** Scrolling changes
2082 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2083 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2084 of buffer at first key-press (instead they move to top/bottom of buffer)
2085 when `scroll-error-top-bottom' is non-nil.
2087 *** New option `scroll-error-top-bottom' (see above).
2089 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2090 scroll a line instead of full screen.
2092 *** New property `scroll-command' should be set on a command's symbol to
2093 define it as a scroll command affected by `scroll-preserve-screen-position'.
2095 *** If you customize `scroll-conservatively' to a value greater than 100,
2096 Emacs will never recenter point in the window when it scrolls due to
2097 cursor motion commands or commands that move point (e.f., `M-g M-g').
2098 Previously, you needed to use `most-positive-fixnum' as the value of
2099 `scroll-conservatively' to achieve the same effect.
2101 *** "Aggressive" scrolling now honors the scroll margins.
2102 If you customize `scroll-up-aggressively' or
2103 `scroll-down-aggressively' and move point off the window, Emacs now
2104 scrolls the window so as to avoid positioning point inside the scroll
2107 ** Basic SELinux support has been added.
2108 This requires Emacs to be linked with libselinux at build time.
2110 *** Emacs preserves the SELinux file context when backing up.
2111 Also, the function `copy-file' has an extra optional argument for
2112 preserving SELinux context, and the return value of `backup-buffer'
2113 now includes the SELinux context.
2115 *** New functions `file-selinux-context' and `set-file-selinux-context'
2116 get and set the SELinux context of a file.
2120 *** `delete-by-moving-to-trash' now only affects commands that specify
2121 trashing. This avoids inadvertently trashing temporary files.
2123 *** Calling `delete-file' or `delete-directory' with a prefix argument
2124 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2126 ** File- and directory-local variable changes
2128 *** You can stop directory local vars from applying to subdirectories.
2129 Add an element (subdirs . nil) to the alist portion of any variables
2130 settings to indicate that the section should not apply to
2133 *** Directory local variables can apply to some file-less buffers.
2134 Affected modes include dired, vc-dir, and log-edit. For example,
2135 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2136 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2137 `hack-dir-local-variables-non-file-buffer' to support this.
2139 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2140 Instead, use "eval: (minor-mode 1)".
2142 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2143 to `inhibit-local-variables-regexps'. As the name suggests, it now
2144 applies to ALL file local variables, not just -*- lines. The
2145 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2150 *** The `quit-window' command now restores the last buffer displayed
2151 in the quitted window.
2153 *** Resizing an Emacs frame now preserves proportional window sizes,
2154 modulo restrictions like window minimum sizes and fixed-size windows.
2156 *** The behavior of `display-buffer' is now customizable in detail.
2158 **** New option `display-buffer-base-action' specifies a list of
2159 user-determined display "actions" (functions and optional arguments
2160 for choosing the displaying window).
2162 This takes precedence over the default display action, which is
2163 specified by `display-buffer-fallback-action'.
2165 **** New option `display-buffer-alist' maps buffer name regexps to
2166 display actions, taking precedence over `display-buffer-base-action'.
2168 *** New option `window-combination-limit'.
2169 The new option `window-combination-limit' allows to return the space
2170 obtained for resizing or creating a window more reliably to the window
2171 from which such space was obtained.
2173 *** New option `window-combination-resize'.
2174 The new option `window-combination-resize' allows to split a window that
2175 otherwise cannot be split because it's too small by stealing space from
2176 other windows in the same combination. Subsequent resizing or deletion
2177 of the window will resize all windows in the same combination as well.
2179 *** New option `frame-auto-hide-function' lets you choose between
2180 iconifying or deleting a frame when burying a buffer in a dedicated
2181 frame, or quitting a window showing a buffer in a frame of its own.
2183 *** New commands `maximize-window' and `minimize-window'.
2184 These maximize and minimize the size of a window within its frame.
2186 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2187 These functions allow to navigate through the live buffers that have
2188 been shown in a specific window.
2190 ** Minibuffer changes
2192 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2193 This is handy for minibuffer-only frames, and is also used for the feature
2194 where mouse-1 pops up *Messages*"', which can now easily be changed.
2196 *** Minibuffers set `truncate-lines' to nil.
2197 If you want to change the value to something else, you could use
2198 for example `minibuffer-setup-hook'.
2200 ** `auto-mode-case-fold' is now enabled by default.
2202 ** `backup-by-copying-when-mismatch' now defaults to t.
2204 ** New basic faces `error', `warning', `success'.
2205 These are used to highlight text indicating failure, caution or
2206 successful operation.
2208 ** New option `list-colors-sort' defines the color sort order
2209 for `list-colors-display'.
2211 ** The variable `focus-follows-mouse' now always defaults to nil.
2214 * Editing Changes in Emacs 24.1
2218 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2219 `isearch-yank-line'.
2221 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2222 `isearch-yank-kill'.
2224 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2226 ** New commands `count-words-region' and `count-words'.
2228 *** M-= is bound to `count-words-region', not `count-lines-region'.
2229 The `count-words-region' command, when called interactively, reports
2230 the number of lines, words, and characters in the region. It is a
2231 superset of the old `count-lines-region', which is now an obsolete
2234 ** The command `just-one-space' (M-SPC), if given a negative argument,
2235 also deletes newlines around point.
2239 *** New option `delete-active-region'.
2240 If non-nil, [delete] and DEL delete the region if it is active and no
2241 prefix argument is given. If set to `kill', those commands kill
2244 *** New command `delete-forward-char', bound to [delete].
2245 This is meant for interactive use, and obeys `delete-active-region'.
2246 The command `delete-char' does not obey `delete-active-region'.
2248 *** `delete-backward-char' is now a Lisp function.
2249 Apart from obeying `delete-active-region', its behavior is unchanged.
2250 However, the byte compiler now warns if it is called from Lisp; Lisp
2251 callers should use delete-char with a negative argument instead.
2253 *** The option `mouse-region-delete-keys' has been deleted.
2255 ** Selection changes.
2257 The default handling of clipboard and primary selections has been
2258 changed to conform with modern X applications. In short, most
2259 commands for killing and yanking text now use the clipboard, while
2260 mouse commands use the primary selection.
2262 In the following, we provide a list of these changes, followed by a
2263 list of steps to get the old behavior back if you prefer that.
2265 *** `select-active-regions' now defaults to t.
2266 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2267 the kill ring. The selected text is put in the primary selection, if
2268 the system possesses a separate primary selection facility (e.g. X).
2270 **** `select-active-regions' also accepts a new value, `only'.
2271 This means to only set the primary selection for temporarily active
2272 regions (usually made by mouse-dragging or shift-selection);
2273 "ordinary" active regions, such as those made with C-SPC followed by
2274 point motion, do not alter the primary selection.
2276 **** `mouse-drag-copy-region' now defaults to nil.
2278 *** mouse-2 is now bound to `mouse-yank-primary'.
2279 This pastes from the primary selection, ignoring the kill-ring.
2280 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2282 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2284 *** `x-select-enable-primary' now defaults to nil.
2285 Thus, commands that kill text or copy it to the kill-ring (such as
2286 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2288 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2289 exactly equivalent to M-w, C-w, and C-y respectively.
2291 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2292 non-nil by default, as Windows does not support the primary selection
2293 between applications.
2295 *** To return to the previous behavior, do the following:
2297 **** Change `select-active-regions' to nil.
2298 **** Change `mouse-drag-copy-region' to t.
2299 **** Change `x-select-enable-primary' to t (on X only).
2300 **** Change `x-select-enable-clipboard' to nil.
2301 **** Bind `mouse-yank-at-click' to mouse-2.
2303 *** Support for X cut buffers has been removed.
2305 *** X clipboard managers are now supported.
2306 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2308 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2309 in the current rectangle. With a prefix argument, this prompts for a
2310 number to count from and for a format string.
2312 ** `redisplay-dont-pause' now defaults to t.
2313 This makes Emacs feel more responsive to editing commands that arrive
2314 at high rate, e.g. if you lean on some key, because stopping redisplay
2315 in the middle (when this variable is nil) forces more expensive
2316 updates later on, and Emacs appears to be unable to keep up.
2318 ** The behavior of <TAB> for active regions in Text mode has changed.
2319 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2320 when the region is active causes Emacs to indent all the lines in the
2321 region, aligning them with the line previous to the first line in the
2322 region (or with the left margin if there is no previous line).
2324 ** When `occur' is called with a prefix argument, matching strings are
2325 collected into the `*Occur*' buffer without line numbers. If there
2326 are parenthesized subexpressions in the specified regexp, `occur'
2327 reads replacement text that may contain \\& and \\N whose convention
2328 follows `replace-match'.
2331 * Changes in Specialized Modes and Packages in Emacs 24.1
2333 ** Archive Mode has basic support for browsing and updating 7z archives.
2337 *** BibTeX mode now supports biblatex.
2338 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2339 `bibtex-entry-field-alist' is now an obsolete alias for
2340 `bibtex-BibTeX-entry-alist'.
2342 *** New command `bibtex-search-entries', bound to C-c C-a.
2344 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2346 *** New variable `bibtex-search-entry-globally'.
2350 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2352 *** The default browser used by the package is now the "xdg-open" program,
2353 on platforms that support it. This calls your desktop's preferred browser.
2357 *** Support for musical notes.
2359 *** Support for logarithmic units.
2361 *** No longer uses the tex prefix for TeX specific unit names when
2362 using TeX or LaTeX mode.
2364 *** New option to highlight selections using faces.
2366 *** `calc-histogram' has the option of using a vector to determine the bins.
2368 *** New "O" option prefix.
2370 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2372 ** Calendar, Diary, and Appt
2374 *** Diary entries can contain non-printing "comments".
2375 See the variable `diary-comment-start'.
2377 *** Appointments can specify their individual warning times.
2378 See the variable `appt-warning-time-regexp'.
2380 *** The function specified by `appt-disp-window-function' may be passed
2381 lists of arguments if multiple appointments are due at similar times.
2382 If you are using a custom function for this, you should update it.
2384 *** New function `diary-hebrew-birthday'.
2386 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2387 may no longer be nil, but must all be strings.
2389 *** The obsolete (since Emacs 22.1) method of enabling the appt
2390 package by adding `appt-make-list' to `diary-hook' has been removed.
2391 Use `appt-activate' instead.
2393 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2394 appt-issue-message (use the function appt-activate)
2395 appt-visible/appt-msg-window (use the variable appt-display-format)
2397 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2398 view-diary-entries, list-diary-entries, show-all-diary-entries
2402 *** New feature to "guess" the style in an existing buffer.
2403 The main entry point is M-x c-guess.
2405 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2407 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2408 Thus C-M-a will, by default, go to the beginning of the immediate function,
2411 *** "Macros with semicolons" can be registered for correct indentation.
2412 Where such a macro ends a line (no semicolon) the next statement is no longer
2413 parsed as a statement continuation.
2415 ** Comint and modes derived from it use the standard completion code.
2419 *** Compilation mode can be used without Font Lock mode.
2420 `compilation-parse-errors-function' is now obsolete.
2422 *** New variable `compilation-filter-start', which is bound while
2423 `compilation-filter-hook' runs. It records the start position of the
2424 text inserted by `compilation-filter'.
2426 *** `compilation-error-screen-columns' and `compilation-first-column'
2427 are obeyed in the editing buffer. So programming language modes can
2428 set them, whereas previously only the value in the *Compilation*
2433 *** Customize buffers now contain a search field.
2434 The search is performed using `customize-apropos'.
2435 To turn off the search field, set `custom-search-field' to nil.
2437 *** Options in customize group buffers start out hidden if not customized.
2438 Use the arrow to the left of the option name to toggle visibility.
2440 *** custom-buffer-sort-alphabetically now defaults to t.
2442 *** The color widget now has a "Choose" button, which allows you to
2443 choose a color via `list-colors-display'.
2447 *** It is now possible to access buses other than the default system
2450 *** The `dbus-register-method' and `dbus-register-property' functions
2451 optionally do not register names.
2453 *** The new function `dbus-register-service' registers a known service
2454 name on a D-Bus without also registering a property or a method.
2458 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2459 if called with a prefix argument, read a file name from the minibuffer
2460 instead of using the current buffer.
2462 *** The "dired local variables" feature of Dired-x is obsolete.
2463 The standard directory local variables feature replaces it.
2467 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2468 controlling attempts to autojoin a channel.
2470 *** New variable `erc-coding-system-precedence': If we use `undecided'
2471 as the server coding system, this variable will then be consulted.
2472 The default is to decode strings that can be decoded as utf-8 as
2473 utf-8, and do the normal `undecided' decoding for the rest.
2477 *** The default value of `eshell-directory-name' has changed
2478 to be an "eshell" directory in `user-emacs-directory'.
2479 The old "~/.eshell/" directory is still used if it exists, though.
2483 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2484 It now supports multithread non-stop debugging and simultaneous
2485 debugging of several threads.
2489 *** RET (`image-toggle-animation') toggles animation, if applicable.
2490 Animation plays once, unless the option `image-animate-loop' is non-nil.
2494 *** New command M-x info-display-manual displays a named Info manual.
2495 If that manual is already visited in some Info buffer, it displays
2496 that buffer. (This is handy if you have many manuals in many *info*
2497 buffers, and don't remember the name of the buffer visiting the manual
2498 you want to consult.) Otherwise, it loads and displays the manual.
2500 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2501 This is for compatibility with the stand-alone Info reader program,
2502 and also because `Info-edit' is a rarely used command that is disabled
2505 ** Mail mode changes (not Message mode)
2507 *** New command M-x mail-add-attachment for adding MIME attachments
2509 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2510 (Its name is misleading, since it has nothing to do with MIME
2511 attachments.) The old name is now an obsolete alias to the new name.
2513 ** MH-E has been updated to MH-E version 8.3.1.
2514 See MH-E-NEWS for details.
2516 ** Modula-2 mode provides auto-indentation.
2518 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2520 ** nXML mode no longer binds C-RET to `nxml-complete'.
2521 Completion is now performed via `completion-at-point', bound to C-M-i
2522 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2523 default), this performs tag completion.
2525 ** Org mode has been updated to version 7.8.09.
2526 See ORG-NEWS for details.
2528 ** Prolog mode has been completely revamped, with lots of additional
2529 functionality such as more intelligent indentation, electricity,
2530 support for more variants, including Mercury, and a lot more.
2534 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2535 in the Rmail incoming message.
2537 *** The variable `rmail-message-filter' no longer has any effect.
2538 This change was made in Emacs 23.1 but was not advertised at the time.
2539 Try using `rmail-show-message-hook' instead.
2543 *** M-x shell prompts for the shell path name if the default directory
2544 is a remote file name and neither the environment variable $ESHELL nor
2545 the variable `explicit-shell-file-name' is set.
2547 *** TAB is now bound to the standard `completion-at-point' command,
2548 which now implements the pcomplete rules for shell command completion.
2552 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2553 if the mail server supports them. This uses either built-in GnuTLS
2554 support, or the starttls.el library. Customize `smtpmail-stream-type'
2557 *** The variable `smtpmail-auth-credentials' has been removed.
2558 By default, the information is now stored in the file ~/.authinfo.
2559 This was the default value of smtpmail-auth-credentials. If you had
2560 customized smtpmail-auth-credentials to a list of user names and
2561 passwords, those settings are not used. During your first connection
2562 to the smtp server, Emacs will prompt for the user name and password,
2563 and offer to save them to ~/.authinfo. Or you can manually copy the
2564 credentials to ~/.authinfo. For example, if you had
2566 (setq smtpmail-auth-credentials
2567 '(("mail.example.org" 25 "jim" "s!cret")))
2569 then the equivalent line in ~/.authinfo would be
2571 machine mail.example.org port 25 login jim password s!cret
2573 See the auth-source manual for more information, e.g. on encrypting
2574 the credentials file.
2576 *** The variable `smtpmail-starttls-credentials' has been removed.
2577 If you had that set, you need to put
2579 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2581 in your ~/.authinfo file instead.
2583 *** SMTPmail defaults to using the address in the From: header as the
2584 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2585 to the address you wish to use instead.
2589 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2590 and `sql-oracle-scan-on'.
2592 *** New options controlling prompting for login parameters.
2593 Each supported product has a custom variable `sql-*-login-params',
2594 which is a list of the parameters to be prompted for before a
2595 connection is established.
2597 *** The command `sql-product-interactive' now takes a prefix argument,
2598 which causes it to prompt for an SQL product.
2600 *** Product-specific SQL interactive commands now take prefix arguments.
2601 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2602 given a prefix argument, prompt for a name for the SQL interactive
2603 buffer. This reduces the need for calling `sql-rename-buffer'.
2605 *** SQL interactive modes suppress command continuation prompts, and
2606 replace tabs with spaces. The first change impacts multiple line SQL
2607 statements entered with C-j between each line, statements yanked into
2608 the buffer and statements sent with `sql-send-*' functions. The
2609 second prevents the MySQL and Postgres interpreters from listing
2610 object name completions when sent text via `sql-send-*' functions.
2612 *** New command `sql-connect' starts a predefined SQLi session,
2613 using the login parameters from `sql-connection-alist'.
2615 *** New "Save Connection" menu item in SQLi buffers.
2616 This gathers the login params specified for the SQLi session, if it
2617 was not started by a connection, and saves them as a new connection.
2619 *** New commands for listing database objects and details:
2620 sql-list-all and sql-list-table.
2622 *** An API for manipulating SQL product definitions has been added.
2626 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2630 *** New inline access method "ksu" (kerberized su).
2632 *** The following access methods are discontinued: "ssh1_old",
2633 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2635 *** The user option `remote-file-name-inhibit-cache' controls whether
2636 remote file attributes are cached for better performance.
2638 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2639 default value to "".
2641 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2642 for remote machines which support SELinux.
2644 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2645 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2646 the degree of parallelism.
2648 ** VC and related modes
2650 *** Support for pulling on distributed version control systems.
2651 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2652 supported (currently with Bzr, Git, and Mercurial), to update the
2653 current branch and working tree. A prefix argument means to prompt
2654 the user for specifics, e.g. a pull location.
2656 *** `vc-update' is now an alias for `vc-pull'.
2658 *** Support for merging on distributed version control systems.
2659 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2660 is supported (currently with Bzr, Git, and Mercurial), to merge
2661 changes from another branch into the current one. It prompts for
2662 specifics, e.g. a merge source.
2664 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2665 shows a diff while querying the user. It defaults to t.
2667 *** Log entries in some Log View buffers can be toggled to display a
2668 longer description by typing RET (log-view-toggle-entry-display).
2669 This is currently supported for Bzr, Git, and Mercurial (to support
2670 another backend, define a `log-view-expanded-log-entry-function').
2671 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2672 use this to display the full log entry for the revision at point.
2674 *** New command `vc-ediff' allows visual comparison of two revisions
2675 of a file similar to `vc-diff', but using ediff backend.
2677 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2678 this was not advertised at the time.
2680 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2681 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2682 this was not advertised at the time.
2688 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2690 *** partial-completion-mode (complete.el) is obsolete.
2691 You can get a comparable behavior with:
2692 (setq completion-styles '(partial-completion initials))
2693 (setq completion-pcm-complete-word-inserts-delimiters t)
2695 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2697 *** pgg is obsolete (use EasyPG instead).
2699 *** sregex.el is obsolete, since rx.el is a strict superset.
2701 *** s-region.el and pc-select.el are obsolete.
2702 They are superseded by shift-select-mode, enabled by default since 23.1.
2704 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2708 *** The Landmark game is now invoked with `landmark', not `lm'.
2709 Its functions and variables have been similarly renamed.
2711 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2712 (This interfered with cua-mode.)
2714 *** f90.el has some support for Fortran 2008 syntax.
2716 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2718 *** New command `nato-region' converts text to NATO phonetic alphabet.
2721 * New Modes and Packages in Emacs 24.1
2723 ** Occur Edit mode applies edits made in *Occur* buffers to the
2724 original buffers. It is bound to "e" in Occur mode.
2726 ** New global minor mode electric-pair-mode.
2727 When enabled, typing an open parenthesis automatically inserts the
2728 matching closing one.
2730 ** New global minor mode electric-indent-mode.
2731 When enabled, typing certain characters triggers reindentation.
2732 Major modes wishing to use this can set electric-indent-chars or
2733 electric-indent-functions.
2735 ** New global minor mode electric-layout-mode.
2736 When enabled, typing certain characters automatically inserts newlines.
2737 Major modes wishing to use this can set electric-layout-rules.
2739 ** tabulated-list.el provides a generic major mode for tabulated data,
2740 from which other modes can be derived.
2742 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2744 ** secrets.el is an implementation of the Secret Service API, an
2745 interface to password managers like GNOME Keyring or KDE Wallet. The
2746 Secret Service API requires D-Bus for communication. The command
2747 `secrets-show-secrets' offers a buffer with a visualization of the
2750 ** notifications.el provides an implementation of the Desktop
2751 Notifications API. It requires D-Bus for communication.
2753 ** soap-client.el supports access to SOAP web services from Emacs.
2754 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2756 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
2758 ** New emacs-lock.el package.
2759 The previous version has been moved to obsolete/old-emacs-lock.el.
2760 Now, there is a proper minor mode `emacs-lock-mode'. Protection
2761 against exiting Emacs and killing the buffer can be set separately.
2762 The mechanism for automatically turning off protection for buffers
2763 with dead inferior processes has been generalized.
2766 * Incompatible Lisp Changes in Emacs 24.1
2768 ** Passing a nil argument to a minor mode function call now ENABLES
2769 the minor mode unconditionally. This is so that you can write e.g.
2771 (add-hook 'text-mode-hook 'foo-mode)
2773 to enable foo-mode in Text mode buffers, removing the need for
2774 `turn-on-foo-mode' style functions. This affects all mode commands
2775 defined by `define-minor-mode'. If called interactively, the mode
2776 command still toggles the minor mode.
2778 ** The return value of `backup-buffer' has changed.
2779 It is now a list of three elements, where the second element is a list
2780 describing the original file's SELinux context. If Emacs or the
2781 system lacks SELinux support, the context list is (nil nil nil nil).
2782 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
2784 ** `char-direction-table' and the `char-direction' function were deleted.
2785 They were buggy and inferior to the new support of bidirectional
2786 editing introduced in Emacs 24. If you need the bidirectional
2787 properties of a character, use `get-char-code-property' with the last
2788 argument `bidi-class'.
2790 ** `copy-directory' now copies the source directory as a subdirectory
2791 of the target directory, if the latter is an existing directory. The
2792 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2793 the contents directly into a pre-existing target directory.
2795 ** For mouse click input events in the text area, the Y pixel
2796 coordinate in the POSITION list now counts from the top of the text
2797 area, excluding any header line. Previously, it counted from the top
2800 ** Support for "old-style" backquotes, obsolete for 10+ years, has
2801 been further reduced. Now a backquote not followed by a space is
2802 always treated as a "new-style" backquote. Please remove all
2803 "old-style" backquotes from your code. If your code uses backquotes
2804 as documented in the Elisp manual, and compiles without warning, then
2805 you have nothing to do in this regard. Code not following the
2806 appropriate conventions may fail to compile.
2808 The most common cause of trouble seems to be an old-style backquote
2809 followed by a newline. Another cause of trouble is vector notation
2810 for key sequence notation: instead of [(control ,)] and [(control ')],
2811 you should write [(control ?,)] and [(control ?')], which will work in
2814 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2815 was not advertised at the time. The function `custom-initialize-delay'
2816 replaced all known uses.
2818 ** `view-buffer' now treats special mode-class in the same way that
2819 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2820 major mode is special).
2822 ** Menu and tool bar changes
2824 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
2825 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2826 With these alist entries omitted, `make-frame' checks the value of the
2827 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2828 a menu-bar or tool-bar, respectively. If the alist entries are added,
2829 they override the value of `menu-bar-mode'/`tool-bar-mode'.
2831 *** The menu bar bindings's caches are not used any more.
2832 Use (where-is-internal <def> nil t) instead.
2834 ** Regions created by mouse dragging are now normal active regions,
2835 similar to those created by shift-selection (see Selection changes
2836 above). In previous Emacs versions, these regions were delineated by
2837 `mouse-drag-overlay'; that variable has been removed.
2839 ** The fourth argument of `filter-buffer-substring' has been removed.
2840 If you want to remove text properties from the final result, simply
2841 pass the result through substring-no-properties.
2843 ** cl.el no longer provides `cl-19'.
2845 ** The following obsolete functions and aliases have been removed
2846 (the appropriate new function is given in parentheses; "not needed"
2847 means you can just remove all calls to the function in question):
2849 *** `comint-kill-output' (`comint-delete-output')
2850 *** `decompose-composite-char' (`char-to-string')
2851 *** `outline-visible' (`outline-invisible-p')
2852 *** `internal-find-face' (`facep')
2853 *** `internal-get-face' (`facep and check-face')
2854 *** `frame-update-faces' (not needed)
2855 *** `frame-update-face-colors' (`frame-set-background-mode')
2856 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2857 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2858 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2859 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2860 *** `x-make-font-unbold' (`make-face-unbold')
2861 *** `x-make-font-unitalic' (`make-face-unitalic')
2862 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2863 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2864 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2865 *** `char-bytes' (== 1)
2866 *** `isearch-return-char' (`isearch-printing-char')
2867 *** `make-local-hook' (not needed)
2868 *** `set-screen-height' (`set-frame-height')
2869 *** `set-screen-width' (`set-frame-width')
2871 ** The following obsolete variables and varaliases have been removed
2872 (the appropriate new variable is given in parentheses):
2874 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2875 *** `vc-header-alist' (`vc-BACKEND-header')
2876 *** `directory-sep-char' (== ?/)
2877 *** `font-lock-defaults-alist' (`font-lock-defaults')
2878 *** `e' (`float-e').
2880 ** The following obsolete files were removed:
2881 sc.el, x-menu.el, rnews.el, rnewspost.el
2883 ** The format of the finder-inf.el file has changed, since the Finder
2884 mechanism is now based on the package system. The variable
2885 `finder-package-info' is replaced by `package--builtins' and
2886 `finder-keywords-hash'.
2888 ** When generating autoloads, `update-directory-autoloads' no longer
2889 assumes every inspected file is in your `load-path'. It instead
2890 generates relative names according to the current `load-path'.
2893 * Lisp Changes in Emacs 24.1
2895 ** Code can now use lexical scoping by default instead of dynamic scoping.
2896 The `lexical-binding' variable enables lexical scoping for local
2897 variables. It is typically set via a file-local variable in the first
2898 line of the file, in which case it applies to all the code in that
2901 *** `eval' takes a new optional argument `lexical' to choose the new lexical
2902 binding instead of the old dynamic binding mode.
2904 *** Lexically scoped interpreted functions are represented with a new form
2905 of function value which looks like (closure ENV ARGS &rest BODY).
2907 *** New macro `letrec' to define recursive local functions.
2909 *** `defvar' and `defconst' now mark the variable as special (dynamic).
2910 So do `defcustom' and other forms that call `defvar' as a subroutine.
2912 *** New function `special-variable-p' to check whether a variable is
2913 declared as dynamically bound.
2915 *** The form ((lambda ...) ...) is deprecated.
2917 ** An Emacs Lisp testing tool is now included.
2918 Emacs Lisp developers can use this tool to write automated tests for
2919 their code. See the ERT info manual for details.
2921 ** Changes for bidirectional display and editing
2923 *** New function `current-bidi-paragraph-direction'.
2924 This returns the base direction of the paragraph at point.
2926 *** New function `bidi-string-mark-left-to-right'.
2927 Given a string containing characters from right-to-left scripts, this
2928 function returns another string which can be safely inserted into a
2929 buffer, such that any following text will be always displayed to the
2930 right of that string. (This works by appending an invisible Unicode
2931 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
2933 This is useful when the buffer has overall left-to-right paragraph
2934 direction and you need to insert a string whose contents are not known
2935 in advance, without disrupting the layout of the line.
2939 *** Window tree functions are accessible in Elisp.
2940 Functions are provided to return the parent, siblings or child windows
2941 of any window including internal windows (windows not associated with a
2942 buffer) in the window tree.
2944 **** New function `window-valid-p' gives non-nil for live and internal
2947 **** Window manipulation can deal with internal windows.
2948 Many window handling functions like `split-window', `delete-window', or
2949 `delete-other-windows' as well as the window resizing functions can now
2950 act on any window including internal ones.
2952 *** window-total-height/-width vs window-body-height/-width.
2953 The function `window-height' has been renamed to `window-total-height'
2954 and `window-width' has been renamed to `window-body-width'. The old
2955 names are provided as aliases. Two new functions `window-total-width'
2956 and `window-body-height' are provided.
2958 *** Window parameters specific to window handling functions.
2959 For each window you can specify a parameter to override the default
2960 behavior of a number of functions like `split-window', `delete-window'
2961 and `delete-other-windows'. The variable `ignore-window-parameters'
2962 allows to ignore processing such parameters.
2964 *** New semantics of third argument of `split-window'.
2965 The third argument of `split-window' has been renamed to SIDE and can be
2966 set to any of the values 'below, 'right, 'above, or 'left to make the
2967 new window appear on the corresponding side of the window that shall be
2968 split. Any other value of SIDE will cause `split-window' to split the
2969 window into two side-by-side windows as before.
2971 *** Window resizing functions.
2972 A new standard function for resizing windows called `window-resize' has
2973 been introduced. This and all other functions for resizing windows no
2974 longer delete any windows when they become too small.
2976 *** Deleting the selected window now selects the most recently selected
2977 live window on that frame instead.
2979 *** `adjust-window-trailing-edge' adjustments.
2980 `adjust-window-trailing-edge' can now deal with fixed-size windows and
2981 is able to resize other windows if a window adjacent to the trailing
2982 edge cannot be shrunk any more. This makes its behavior more similar to
2983 that of Emacs 21 without compromising, however, its inability to delete
2984 windows which was introduced in Emacs 22.
2986 *** Window-local buffer lists.
2987 Windows now have local buffer lists. This means that removing a buffer
2988 from display in a window will preferably show the buffer previously
2989 shown in that window with its previous window-start and window-point
2990 positions. This also means that the same buffer may be automatically
2991 shown twice even if it already appears in another window.
2993 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2994 which if non-nil requires the buffer to be displayed in the currently
2995 selected window, signaling an error otherwise. If nil, another window
2996 can be used, e.g. if the selected one is strongly dedicated.
2998 *** `split-window-vertically' and `split-window-horizontally' renamed
2999 to `split-window-below' and `split-window-right' respectively.
3000 The old names are kept as aliases.
3004 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3005 named ACTION, and takes a display action of the same form as
3006 `display-buffer-base-action' (see Changes, above). A non-nil,
3007 non-list value is treated specially, as the old meaning.
3009 **** New variable `display-buffer-overriding-action'.
3011 **** The procedure of `display-buffer' etc. to choose a window is
3012 determined by combining `display-buffer-overriding-action',
3013 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3014 and `display-buffer-fallback-action'. The second and fourth of these
3015 are user-customizable variables.
3017 See the docstring of `display-buffer' for details.
3019 *** New functions `window-state-get' and `window-state-put'.
3020 These functions allow to save and restore the state of an arbitrary
3021 frame or window as an Elisp object.
3025 *** New variable `completion-extra-properties' used to specify extra
3026 properties of the current completion:
3027 - :annotate-function, same as the old completion-annotate-function.
3028 - :exit-function, function to call after completion took place.
3030 *** Functions on `completion-at-point-functions' can return any of the
3031 properties valid for `completion-extra-properties'.
3033 *** `completion-annotate-function' is obsolete.
3035 *** New `metadata' method for completion tables. The metadata thus returned
3036 can specify various details of the data returned by `all-completions':
3037 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3038 used to select a style in completion-category-overrides.
3039 - `annotation-function' to add annotations in *Completions*.
3040 - `display-sort-function' to specify how to sort entries in *Completions*.
3041 - `cycle-sort-function' to specify how to sort entries when cycling.
3043 *** `minibuffer-local-filename-must-match-map' is not used any more.
3044 Instead, the bindings in `minibuffer-local-filename-completion-map'
3045 are combined with `minibuffer-local-must-match-map'.
3047 *** New variable `completing-read-function' allows overriding the
3048 behavior of `completing-read'.
3050 ** `glyphless-char-display' can now distinguish between graphical and
3051 text terminal display, via a char-table entry that is a cons cell.
3053 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3054 Instead, the offending function is removed.
3058 *** New function `run-hook-wrapped' for running an abnormal hook by
3059 passing the hook functions as arguments to a "wrapping" function.
3060 Like `run-hook-with-args-until-success', it stops at the first
3061 non-nil return value.
3063 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3064 set of "wrapping" filters, similar to around advice.
3065 (A version of this macro was actually added in Emacs 23.2 but was not
3066 advertised at the time.)
3070 *** New macro `condition-case-unless-debug' (this was actually added in
3071 Emacs 23.1 as condition-case-no-debug, but not advertised)
3073 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3075 *** Variable `stack-trace-on-error' removed.
3077 *** The debugger can now "continue" from an error, which means it will
3078 jump to the error handler as if the debugger had not been invoked
3079 instead of jumping all the way to the top-level.
3081 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3082 This can be useful when `inhibit-quit' is set.
3084 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3085 named Emacs server instances.
3087 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3088 to redirect STDOUT to a file.
3090 ** The function `format-time-string' now supports the %N directive,
3091 for higher-resolution time stamps.
3093 ** New input reading functions
3095 *** New function `read-char-choice' reads a restricted set of
3096 characters, discarding any inputs not inside the set.
3098 *** The command `read-color' now requires a match for a color name
3099 or RGB triplet, instead of signaling an error if the user provides
3102 **** `facemenu-read-color' is now an alias for `read-color'.
3104 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3105 The variable is now used to load all kind of supported dynamic libraries,
3106 not just image libraries. The previous name is still available as an
3109 ** Syntax parsing changes
3111 *** New variable `syntax-propertize-function'.
3112 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3113 This allows syntax-table properties to be set independently from font-lock:
3114 just call syntax-propertize to make sure the text is propertized.
3115 Together with this new variable come a new hook
3116 syntax-propertize-extend-region-functions, as well as two helper functions:
3117 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3118 as-is; and syntax-propertize-rules which provides a new way to specify
3121 *** Syntax tables support a new "comment style c" additionally to style b.
3123 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3125 ** frame-local variables cannot be let-bound any more.
3127 ** Major and minor mode changes
3129 *** `set-auto-mode' now respects mode: local variables at the end of files,
3130 as well as those in the -*- line.
3132 *** `prog-mode' is a new major mode from which programming modes
3135 **** `prog-mode-hook' can be used to enable features for programming
3136 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3137 on-the-fly spell checking for comments and strings.
3139 **** New minor modes `prettify-symbols-mode' and
3140 `global-prettify-symbols-mode' let the user enable symbol
3141 prettification (replacing a string like "lambda" with the Greek lambda
3144 *** New hook `change-major-mode-after-body-hook', run by
3145 `run-mode-hooks' just before any other mode hooks.
3147 *** Enabled globalized minor modes can be disabled in specific major modes.
3148 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3149 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3151 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3153 ** File-handling changes
3155 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3156 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3157 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3158 argument is supplied (see Trash changes, above).
3160 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3162 ** Tool-bars can display separators.
3163 Tool-bar separators are handled like menu separators in menu-bar maps,
3164 i.e. via menu entries of the form `(menu-item "--")'.
3168 *** Animated images support (currently animated gifs only).
3170 **** `image-animated-p' returns non-nil if an image can be animated.
3172 **** `image-animate' animates a supplied image spec.
3174 **** `image-animate-timer' returns the timer object for an image that
3177 *** `image-extension-data' has been renamed to `image-metadata'.
3178 The old name is an obsolete alias to the new one.
3180 *** Image mode can view any image type that ImageMagick supports.
3181 This requires Emacs to be built with ImageMagick support.
3183 **** New function `imagemagick-types', defined if ImageMagick support
3184 is enabled, returns a list of image file extensions that your
3185 ImageMagick installation supports.
3187 **** New function `imagemagick-register-types' enables ImageMagick
3188 image types in Image mode and in `create-image' and other helper
3191 **** New option `imagemagick-types-inhibit' excludes certain
3192 ImageMagick image types from `imagemagick-register-types'.
3194 **** With ImageMagick support, there are extra Image mode commands to
3195 resize and rotate images: `image-transform-fit-to-height',
3196 `image-transform-fit-to-width', `image-transform-set-rotation', and
3197 `image-transform-set-scale'.
3199 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3200 passes it to the mail user agent function. This argument specifies an
3201 action for returning to the caller after finishing with the mail. For
3202 example, this is used by Rmail to optionally delete a mail window.
3204 ** XML and HTML parsing
3205 If Emacs is compiled with libxml2 support, there are two new
3206 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3207 and `libxml-parse-xml-region' (which parses XML). Both return an
3208 Emacs Lisp parse tree.
3210 ** Networking and encryption changes
3212 *** `open-network-stream' can now be used to open an encrypted stream.
3213 It now accepts an optional `:type' parameter for initiating a TLS
3214 connection, directly or via STARTTLS. To do STARTTLS, additional
3215 parameters (`:end-of-command', `:success', `:capabilities-command')
3216 must also be supplied.
3218 *** New library gnutls.el.
3219 The new function `gnutls-available-p' returns non-nil if Emacs is
3220 built with GnuTLS support. The main entry points are
3221 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3222 these functions through `open-network-stream', because that can
3223 upgrade connections through STARTTLS opportunistically or use plain
3224 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3227 *** New primitive `secure-hash' that supports many secure hash algorithms:
3228 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3229 sha1.el has been removed. The `sha1' feature is provided by default.
3233 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3235 ** Progress reporters can now "spin".
3236 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3237 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3238 time you call `progress-reporter-update' on that progress reporter,
3239 with a nil or omitted VALUE argument, the reporter message is
3240 displayed with a "spinning bar".
3242 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3243 being reverted, even if the buffer has a local `revert-buffer-function'.
3245 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3246 If delayed-warnings-list is non-nil, the command loop calls
3247 `delayed-warnings-hook' after `post-command-hook'. At present, this
3248 is only used by Emacs on some platforms to display warnings during
3249 startup, which might otherwise not be noticed. This uses the
3250 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3252 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3254 ** New function `make-composed-keymap' that constructs a new keymap
3255 from multiple input maps. You can use this to make a keymap that
3256 inherits from multiple maps, eg:
3257 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3259 ** New function `string-prefix-p'.
3260 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3262 ** New reader macro ## that stands for the empty symbol.
3263 This means that the empty symbol can now be read back. Also, #: by itself
3264 (when not immediately followed by a possible symbol character) stands for
3265 an empty uninterned symbol.
3267 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3269 ** The following functions and variables are obsolete:
3271 *** `tooltip-use-echo-area' is obsolete.
3272 Rather than setting this to t, disable Tooltip mode instead.
3274 *** buffer-substring-filters is obsolete.
3275 Use `filter-buffer-substring-functions' instead.
3277 *** `byte-compile-disable-print-circle' is obsolete.
3279 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3280 Use `post-command-hook' instead.
3282 *** `font-lock-maximum-size' is obsolete.
3285 * Changes in Emacs 24.1 on Non-Free Operating Systems
3287 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3288 and also when HOME is set to C:\ by default.
3290 ** New configure.bat options
3292 *** --enable-checking builds Emacs with extra runtime checks.
3294 *** --distfiles specifies files to be included in binary distribution.
3296 *** --without-gnutls disables automatic GnuTLS detection.
3298 *** --lib for general library linkage, works with the USER_LIBS build variable.
3300 ** New make target `dist' to create binary distribution for MS Windows.
3302 ** The Lisp function `w32-default-color-map' is now obsolete.
3303 (It is only used internally in the Emacs C code.)
3305 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3306 reappear on mouse-over. (Requires OS X 10.6 or later.)
3308 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3309 other platforms, rather than inserting its contents into the buffer.
3312 ----------------------------------------------------------------------
3313 This file is part of GNU Emacs.
3315 GNU Emacs is free software: you can redistribute it and/or modify
3316 it under the terms of the GNU General Public License as published by
3317 the Free Software Foundation, either version 3 of the License, or
3318 (at your option) any later version.
3320 GNU Emacs is distributed in the hope that it will be useful,
3321 but WITHOUT ANY WARRANTY; without even the implied warranty of
3322 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3323 GNU General Public License for more details.
3325 You should have received a copy of the GNU General Public License
3326 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3331 paragraph-separate: "[
\f]*$"