1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2013 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that all necessary updates to the manuals in doc/ are complete.
19 --- means no change in the manuals is needed.
20 When you add a new item, use the appropriate mark if you know it applies,
21 otherwise leave it unmarked.
24 * Installation Changes in Emacs 24.4
26 ** Emacs can be compiled with ACL support.
27 This happens by default if a suitable support library is found at
28 build time, like libacl on GNU/Linux. To prevent this, use the
29 configure option `--disable-acl'.
31 ** Emacs can be compiled with file notification support.
32 This happens by default if a suitable system library is found at
33 build time. To prevent this, use the configure option
34 `--with-file-notification-no'. See below for file-notify features.
35 FIXME? This feature is not available for the Nextstep port. (?)
37 ** The configure option `without-compress-info' has been generalized,
38 and renamed to `without-compress-install'. It now prevents compression
39 of _any_ files during installation.
41 ** The configure option --with-crt-dir has been removed.
42 It is no longer needed, as the crt*.o files are no longer linked
45 ** Directories passed to configure option `--enable-locallisppath' are
46 no longer created during installation.
48 ** Emacs can be compiled with zlib support. If this library is present
49 (which it normally is on most systems), the function
50 `zlib-decompress-region' becomes available, which can decompress gzip-
51 and zlib-format compressed data.
54 ** Emacs for NS (OSX, GNUStep) can be built with ImageMagick support.
55 pkg-config is required to find ImageMagick libraries.
57 ** For OSX >= 10.5, the Core text based font backend from the Mac port is used.
58 For GNUStep and OSX 10.4 the old backend is used.
59 To use the old backend by default, do on the command line:
60 % defaults write org.gnu.Emacs FontBackend ns
63 * Startup Changes in Emacs 24.4
66 ** The -L option, which normally prepends its argument to load-path,
67 will instead append, if the argument begins with `:'.
70 * Changes in Emacs 24.4
73 ** Emacs now supports menus on text-mode terminals.
74 If the terminal supports a mouse, clicking on the menu bar, or on
75 sensitive portions of the mode line or header line, will drop down the
76 menu defined at that position. Likewise, clicking C-mouse-2 or
77 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
80 If the text terminal does not support a mouse, you can activate the
81 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
83 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
84 customize the option `tty-menu-open-use-tmm' to a non-nil value.
85 (Typing M-` will always invoke `tmm-menubar', even if
86 `tty-menu-open-use-tmm' is nil.)
88 ** Key ? also describes prefix bindings like C-h.
91 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
92 because it affects caching of paragraph scanning results as well.
95 ** `apropos-variable' is now `apropos-user-option'
96 `apropos-user-option' shows all user options while `apropos-variable'
97 shows all variables. When called with a universal prefix argument,
98 the two commands swap their behaviors. When `apropos-do-all' is
99 non-nil, they output the same results.
102 ** `eval-defun' on an already defined defcustom calls the :set function,
105 ** If the new variable `enable-dir-local-variables' is nil,
106 directory local variables are ignored. May be useful for some modes
107 that want to ignore directory-locals while still respecting file-locals.
109 ** The option `set-mark-default-inactive' has been deleted.
110 This unfinished feature was introduced by accident in Emacs 23.1;
111 simply disabling Transient Mark mode does the same thing.
113 ** `initial-buffer-choice' can now specify a function to set up the
116 ** The *Messages* buffer is created in a new major mode `messages-buffer-mode',
117 and read-only. Code that might create the *Messages* buffer should
118 call the function `messages-buffer' to do so and set the mode.
120 ** `remember-notes' creates a buffer whose content is saved on kill-emacs.
121 You may think of it as a *scratch* buffer whose content is preserved.
122 In fact, it was designed as a replacement for *scratch* buffer and can
123 be used that way by setting `initial-buffer-choice' to `remember-notes'
124 and `remember-notes-buffer-name' to "*scratch*". Without the second
125 change, *scratch* buffer will still be there for notes that do not
126 need to be preserved.
128 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
130 ** ACL support has been added.
132 *** Emacs preserves the ACL entries of files when backing up.
134 *** New functions `file-acl' and `set-file-acl' get and set the ACL
135 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
136 libacl. On MS-Windows, the NT Security APIs are used to emulate the
137 POSIX ACL interfaces.
139 ** New option `scroll-bar-adjust-thumb-portion'.
140 Available only on X, this option allows to control over-scrolling
141 using the scroll bar (i.e. dragging the thumb down even when the end
142 of the buffer is visible).
144 ** New function `add-face-text-property' has been added, which can be
145 used to conveniently prepend/append new face attributes to text.
147 ** In compiled Lisp files, the header no longer includes a timestamp.
149 ** Multi-monitor support has been added.
151 *** New functions `display-monitor-attributes-list' and
152 `frame-monitor-attributes' can be used to obtain information about
153 each physical monitor on multi-monitor setups.
155 *** The functions `display-pixel-width' and `display-pixel-height' now
156 behave consistently among the platforms: they return the pixel width
157 or height for all physical monitors associated with the given display
158 as just they were on X11. To get information for each physical
159 monitor, use the new functions above. Similar notes also apply to
160 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
161 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
163 ** New macro `alternatives-define' can be used to define generic commands.
164 Generic commands are interactive functions whose implementation can be
165 selected among several alternatives, as a matter of user preference.
167 ** The blink cursor stops blinking after 10 blinks (default) on X and NS.
168 You can change the default by customizing the variable blink-cursor-blinks.
169 Also timers for blinking are stopped when no blinking is done, so Emacs does
170 not consume CPU cycles.
172 ** New command `frameset-to-register' is now bound to `C-x r f', replacing
173 `frame-configuration-to-register'. It offers similar functionality, plus
174 some enhancements, like the ability to restore deleted frames. Command
175 `frame-configuration-to-register' is still available, but unbound.
177 ** The command `quail-help' is deleted. Use `C-h C-\'
178 (`describe-input-method') instead.
180 ** The default value of `comment-use-global-state' is changed to t,
181 and this variable has been marked obsolete.
183 ** `fill-single-char-nobreak-p' prevents fill from breaking a line after
184 a 1-letter word, which is an error according to Polish and
185 Czech typography rules. To globally enable this feature, evaluate:
187 (add-hook 'fill-nobreak-predicate 'fill-single-char-nobreak-p)
190 * Editing Changes in Emacs 24.4
192 ** New command `rectangle-mark' makes a rectangular region.
193 Most commands are still unaware of it, but kill/yank do work on the rectangle.
195 ** C-x TAB enters a transient interactive mode.
196 You can then use the left/right cursor keys to move the block of text.
198 ** `tab-stop-list' is now implicitly extended to infinity by repeating
199 the last step. Its default value is changed to nil which means a tab
200 stop every `tab-width' columns.
202 ** `split-window' is no longer a command, just a non-interactive function.
203 As a command it was a special case of `split-window-below', and as such
204 superfluous. After being reimplemented in Lisp, its interactive form
205 was mistakenly retained.
207 ** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
208 bound to <f11> and M-<f10>, respectively.
210 ** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
214 ** New option `visual-order-cursor-movement'.
215 If this is non-nil, cursor motion with arrow keys will follow the
216 visual order of characters on the screen: <left> always moves to the
217 left, <right> always moves to the right, disregarding the surrounding
218 bidirectional context.
220 ** All register commands can now show help with preview.
222 ** New command `kmacro-to-register' to store keyboard macros in registers.
226 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
227 You can pick the name of the function and the variables with `C-x 4 a'.
230 * Changes in Specialized Modes and Packages in Emacs 24.4
232 ** prolog-use-smie has been removed, along with the non-SMIE indentation code.
234 ** SMIE indentation can be customized via `smie-config'.
235 The customizaton can be guessed by Emacs by providing a sample indented
236 file and letting SMIE learn from it.
238 ** sh-script now uses its SMIE indentation algorithm by default.
240 ** The debugger's `e' command evaluates the code in the context at point.
241 This includes using the lexical environment at point, which means that
242 `e' now lets you access lexical variables as well.
244 ** `eshell' now supports visual subcommands and options
245 Eshell has been able to handle "visual" commands (interactive,
246 non-line oriented commands such as top that require display
247 capabilities not provided by eshell) by running them in an Emacs
248 terminal emulator. See `eshell-visual-commands'.
250 This feature has been extended to subcommands and options that make a
251 usually line-oriented command a visual command. Typical examples are
252 "git log" and "git <command> --help" which display their output in a
253 pager by default. See `eshell-visual-subcommands' and
254 `eshell-visual-options'.
256 ** If your Emacs is compiled with libxml2 support, you can use the new
257 built-in web browser `eww'.
259 ** `remember' can now store notes in separates files
260 You can use the new function `remember-store-in-files' within the
261 `remember-handler-functions' option.
263 See `remember-data-directory' and `remember-directory-file-name-format'
264 for new options related to this function.
266 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
268 ~/.emacs.d/timelog replaces ~/.timelog
269 ~/.emacs.d/vip replaces ~/.vip
270 ~/.emacs.d/viper replaces ~/.viper
271 ~/.emacs.d/ido.last replaces ~/.ido.last
272 ~/.emacs.d/kkcrc replaces ~/.kkcrc
273 ~/.emacs.d/quickurls replaces ~/.quickurls
274 ~/.emacs.d/idlwave replaces ~/.idlwave
275 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
276 ~/.emacs.d/places replaces ~/.emacs-places
277 ~/.emacs.d/shadows replaces ~/.shadows
278 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
279 ~/.emacs.d/strokes replaces ~/.strokes
280 ~/.emacs.d/notes replaces ~/.notes
281 ~/.emacs.d/type-break replaces ~/.type-break
282 Also the following files used by the now obsolete otodo-mode.el:
283 ~/.emacs.d/todo-do replaces ~/.todo-do
284 ~/.emacs.d/todo-done replaces ~/.todo-done
285 ~/.emacs.d/todo-top replaces ~/.todo-top
288 ** Delphi mode is now called OPascal mode.
289 *** All delphi-* variables and functions have been renamed to opascal-*.
290 *** `delphi-newline-always-indents' is not supported any more.
291 Use `electric-indent-mode' instead.
292 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
294 ** Eldoc Mode works properly in the minibuffer.
296 ** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
298 ** completing-read-multiple's separator can now be a regexp.
299 The default separator is changed to allow surrounding spaces around the comma.
303 *** Battery information via the BSD `apm' utility is now supported.
307 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
309 ** Calendar and Diary
311 *** New faces: `calendar-weekday-header', `calendar-weekend-header',
312 `calendar-month-header'.
314 *** New option `calendar-day-header-array'.
316 *** The variable `calendar-font-lock-keywords' is obsolete.
319 *** New variable `diary-from-outlook-function', used by the command
320 `diary-from-outlook'.
322 ** VC and related modes
324 *** In VC directory mode, `D' displays diffs between VC-controlled
325 whole tree revisions.
327 *** In VC directory mode, `L' lists the change log for the current VC
328 controlled tree in a window.
330 *** In VC directory mode, `I' shows a log of changes that will be
331 received with a pull operation.
333 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
334 under current version control system. When called with a prefix
335 argument, you can remove a file from the ignored file list.
337 *** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
338 because it is moved to vc-cvs.el.
342 *** New macro cl-tagbody.
345 *** letf is now just an alias for cl-letf.
349 *** Calc by default now uses the Gregorian calendar for all dates, and
350 uses January 1, 1 AD as its day number 1. Previously Calc used the
351 Julian calendar for dates before September 14, 1752, and it used
352 December 31, 1 BC as its day number 1; the new scheme is more
353 consistent with Calendar's calendrical system and day numbering.
355 *** The new variable `calc-gregorian-switch' lets you configure the
356 date when Calc switches from the Julian to the Gregorian calendar.
357 Nil, the default value, means to always use the Gregorian calendar.
358 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
361 *** Support for ISO 8601 dates.
365 *** `desktop-auto-save-timeout' defines the number of seconds between
366 auto-saves of the desktop.
368 *** `desktop-restore-frames', enabled by default, allows saving and
369 restoring the frame/window configuration (frameset). Additional options
370 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
371 and `desktop-restore-forces-onscreen' offer further customization.
375 *** New minor mode `dired-hide-details-mode' hides details.
379 *** New option `erc-accidental-paste-threshold-seconds'.
380 If set to a number, this can be used to avoid accidentally paste large
381 amounts of data into the ERC input.
385 *** New option `epa-mail-aliases'.
387 You can set this to a list of alias expansions for keys to use
388 in `epa-mail-encrypt'.
390 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
391 that means: when one of the recipients of the message being encrypted
392 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
394 If one element of the variable's value is ("foo@bar.com"),
395 that means: when one of the recipients of the message being encrypted
396 is `foo@bar.com', ignore that name as regards encryption.
397 This is useful to avoid a query when you have no key for that name.
400 ** New F90 mode option `f90-smart-end-names'.
402 ** Icomplete is a bit more like Ido.
403 *** key bindings to navigate through and select the completions.
404 *** The icomplete-separator is customizable, and its default has changed.
405 *** Removed icomplete-show-key-bindings.
406 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
407 (setq icomplete-with-completion-tables '(internal-complete-buffer))
408 will revert to the old behavior.
412 *** Ido has a manual now.
413 *** `ido-use-virtual-buffers' takes a new value 'auto.
414 *** `ido-decorations' has been slightly extended to give a bit more control.
418 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
419 visit the next image file and the previous image file in the same
420 directory, respectively.
422 *** New commands to show specific frames of multi-frame images.
423 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
424 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
426 *** New commands to speed up, slow down, or reverse animation.
429 *** The command `image-mode-fit-frame' deletes other windows.
430 When toggling, it restores the frame's previous window configuration.
431 It also has an optional frame argument, which can be used by Lisp
432 callers to fit the image to a frame other than the selected frame.
436 *** New face `info-index-match' is used to highlight matches in index
437 entries displayed by `Info-index-next', `Info-virtual-index' and
442 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
443 will cycle through faces in `hi-lock-face-defaults' without prompting.
446 *** New global command `M-s h .' (`highlight-symbol-at-point')
447 highlights the symbol found near point without prompting,
448 using the next face automatically.
450 ** Search and Replace
452 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
453 starts a symbol (identifier) incremental search forward with the
454 symbol found near point added to the search string initially.
456 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
457 and adds it to the search string.
459 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
460 between nil and the value of the option `search-invisible' (or `open'
463 *** `query-replace' skips invisible text when `search-invisible' is nil,
464 and opens overlays with hidden text when `search-invisible' is `open'.
467 *** By default, prefix arguments do not now terminate Isearch mode.
468 Set `isearch-allow-prefix' to nil to restore old behavior.
470 *** More Isearch commands accept prefix arguments, namely
471 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
474 *** Word search now matches whitespace at the beginning/end
475 of the search string if it contains leading/trailing whitespace.
476 In an incremental word search or when using a non-nil LAX argument
477 of `word-search-regexp', the lax matching can also match part of
478 the first word (in addition to the lax matching of the last word).
479 The same rules are now applied to the symbol search with the difference
480 that it matches symbols, and non-symbol characters between symbols.
482 ** MH-E has been updated to MH-E version 8.5.
483 See MH-E-NEWS for details.
486 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
487 Customize `unrmail-mbox-format' to change this.
490 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
491 of how Rmail displays non-MIME messages.
494 ** New function `ses-rename-cell' to give SES cells arbitrary names.
496 ** trace-function was largely rewritten.
497 New features include:
498 - no prompting for the destination buffer, unless a prefix-arg was used.
499 - additionally to prompting for a destination buffer, when a prefix-arg is
500 used, the user can enter a "context", i.e. Lisp expression whose value at the
501 time the function is entered/exited will be printed along with the function
502 name and arguments. Useful to trace the value of (current-buffer) or
503 (point) when the function is invoked.
505 ** New command `delete-duplicate-lines' has new types of operation:
506 When its arg ADJACENT is non-nil (when called interactively with C-u C-u)
507 it works like the utility `uniq'. Otherwise by default it deletes
508 duplicate lines everywhere in the region without regard to adjacency.
509 When its arg KEEP-BLANKS is non-nil (when called interactively with
510 C-u C-u C-u), duplicate blank lines are preserved.
512 ** New `cycle-spacing' command allows cycling between having just one
513 space, no spaces, or reverting to the original spacing. Like
514 `just-one-space' command it can handle or ignore newlines and
515 leave different number of spaces.
517 ** Todo mode has been rewritten and enhanced.
518 New features include:
519 - support for multiple todo files and archive files of done items;
520 - renaming, reordering, moving, merging, and deleting categories;
521 - sortable tabular summaries of categories and the types of items they contain;
522 - cross-category lists of items filtered by specific criteria;
523 - more fine-grained interaction with the Emacs diary, by being able to decide
524 for each todo item whether it appears in the Fancy Diary display;
525 - highly flexible new item insertion and item editing;
526 - moving items between categories, storing done items in their category or in
527 archive files, undoing or unarchiving done items;
528 - reprioritizing items by inputting a numerical priority;
529 - extensive customizability of operation and display, including numerous faces.
530 The Todo mode user manual describes all commands and most user options.
531 To support some of these features, a new file format is used, which is
532 incompatible with the old format; however, you can convert old todo and done
533 item files to the new format on initializing the first new todo file, or at any
534 later time with the provided conversion command. The old version of
535 todo-mode.el has been made obsolete and renamed otodo-mode.el.
539 *** The experimental url syntax for remote file names is withdrawn.
542 *** New connection method "adb", which allows to access Android
543 devices by the Android Debug Bridge. The variable `tramp-adb-program'
544 can be used to adapt the path of the "adb" program, if needed.
546 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
547 "scpc" and "rsyncc" are discontinued. The ssh option
548 "ControlMaster=auto" is set automatically in all ssh-based methods,
552 *** Handlers for `file-acl' and `set-file-acl' for remote machines
553 which support POSIX ACLs.
556 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
557 for remote machines which support filesystem notifications.
561 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
563 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
567 *** The commands `woman-default-faces' and `woman-monochrome-faces'
568 are obsolete. Customize the `woman-*' faces instead.
572 *** Added Eshell-Tramp module
573 External su and sudo commands are now the default; the internal,
574 Tramp-using variants can still be used by enabling the eshell-tramp
579 *** The format of `archive-contents' files, generated by package
580 repositories, has changed to allow a new (fifth) element in the data
581 vectors, containing an associative list with extra properties.
583 *** `describe-package' buffer uses the `:url' extra property to
584 display a `Homepage' header, if it's present.
586 ** New term.el option `term-suppress-hard-newline'.
588 ** Obsolete packages:
590 *** longlines.el is obsolete; use visual-line-mode instead.
595 *** terminal.el is obsolete; use term.el instead.
597 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
602 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
605 *** The Info-edit command is obsolete. Editing Info nodes by hand
606 has not been relevant for some time.
610 *** `explicit-bash-args' now always defaults to use --noediting.
611 During initialization, Emacs no longer expends a process to decide
612 whether it is safe to use Bash's --noediting option. These days
613 --noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
616 ** There is a new macro `skip-unless' for skipping ERT tests. See the manual.
619 * New Modes and Packages in Emacs 24.4
621 ** New `superword-mode' in subword.el
622 `superword-mode' overrides the default word motion commands to treat
623 symbol_words as a single word, similar to what `subword-mode' does and
624 using the same internal functions.
626 ** New nadvice.el package offering lighter-weight advice facilities.
628 - add-function/remove-function which can be used to add/remove code on any
629 function-carrying place, such as process-filters or `<foo>-function' hooks.
630 - advice-add/advice-remove to add/remove a piece of advice on a named function,
631 much like `defadvice' does.
633 ** New frameset.el package.
634 It provides a set of operations to save a frameset (the state of all
635 or a subset of the existing frames and windows, somewhat similar to a
636 frame configuration), both in-session and persistently, and restore it
637 at some point in the future.
640 ** The package filenotify.el provides an interface for file system
641 notifications. It requires, that Emacs is compiled with one of the
642 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
645 * Incompatible Lisp Changes in Emacs 24.4
647 ** `kill-region' lost its `yank-handler' optional argument.
649 ** `(input-pending-p)' no longer runs other timers which are ready to
650 run. The new optional CHECK-TIMERS param allows for the prior behavior.
652 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
654 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
655 Some languages match those as »...« and others as «...» so better stay neutral.
657 ** The default file coding for Emacs Lisp files is now utf-8.
658 (See file-coding-system-alist.) In most cases, this change is transparent, but
659 files that contain unusual characters without specifying an explicit coding
660 system may fail to load with obscure errors.
661 You should either convert them to utf-8 or add an explicit `coding:' cookie.
663 ** overriding-terminal-local-map does not replace the local keymaps any more.
664 It used to disable the minor mode, major mode, and text-property keymaps,
665 whereas now it simply has higher precedence.
667 ** Default process filters and sentinels are not nil any more.
668 Instead they default to a function which does what the nil value used to do.
670 ** `read-event' does not return decoded chars in ttys any more.
671 Just as was the case in Emacs-22 and before, decoding of tty input according to
672 keyboard-coding-system is not performed in read-event any more. But contrary
673 to that past, it is still done before input-decode-map/function-key-map/...
675 ** Removed inhibit-local-menu-bar-menus.
677 ** frame-local variables that affect redisplay do not work any more.
678 More specifically, the redisplay does not bother to check for a frame-local
679 value when looking up variables.
681 ** nil and "unbound" are indistinguishable in symbol-function.
682 `symbol-function' never signals `void-function' any more.
683 `fboundp' returns non-nil if the symbol was `fset' to nil.
685 ** `defadvice' does not honor the `freeze' flag and cannot advise
686 special-forms any more.
688 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
689 VAR was bound to nil which was not tremendously useful and just lead to
690 spurious warnings about an unused var.
692 ** The return value of `backup-buffer' has changed.
693 The second argument is no longer an SELinux context, instead it is an
694 alist of extended attributes as returned by the new function
695 `file-extended-attributes'. The attributes can be applied to another
696 file using `set-file-extended-attributes'.
698 ** `visited-file-modtime' now returns -1 for nonexistent files.
699 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
700 in the presence of files with negative time stamps.
702 ** The cars of the elements in `interpreter-mode-alist' are now treated
703 as regexps rather than literal strings. Technically this is an
704 incompatible change, but unless you are using interpreter-mode-alist
705 for something (not just adding elements to it), it ought not to affect you.
708 * Lisp Changes in Emacs 24.4
710 ** New hook `pre-redisplay-function'.
713 ** Functions that pop up menus and dialogs now work on all terminal types,
715 This includes `x-popup-menu', `x-popup-dialog', `message-box',
718 The function `display-popup-menus-p' will now return non-nil for a
719 display or frame whenever a mouse is supported on that display or
722 ** New bool-vector set operation functions:
723 *** `bool-vector-exclusive-or'
724 *** `bool-vector-union'
725 *** `bool-vector-intersection'
726 *** `bool-vector-set-difference'
727 *** `bool-vector-not'
728 *** `bool-vector-subsetp'
729 *** `bool-vector-count-matches'
730 *** `bool-vector-count-matches-at'
732 ** Comparison functions =, <, >, <=, >= now take many arguments.
734 ** The second argument of `eval' can now be a lexical-environment.
736 ** `with-demoted-errors' takes an additional argument `format'.
738 ** New function `define-error'.
740 ** New hook `tty-setup-hook'.
743 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
745 ** Obsoleted functions:
748 *** `lisp-complete-symbol'
750 *** `minibuffer-completion-contents'
751 *** `isearch-nonincremental-exit-minibuffer'
752 *** `isearch-filter-visible'
753 *** `generic-make-keywords-list'
755 ** `with-wrapper-hook' is obsoleted by `add-function'.
756 The few hooks that used with-wrapper-hook are replaced as follows:
757 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
758 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
759 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
761 ** `split-string' now takes an optional argument TRIM.
762 The value, if non-nil, is a regexp that specifies what to trim from
763 the start and end of each substring.
765 ** `get-upcase-table' is obsoleted by the new `case-table-get-table'.
767 ** Support for filesystem notifications.
768 Emacs now supports notifications of filesystem changes, such as
769 creation, modification, and deletion of files. This requires the
770 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
771 MS-Windows systems, this is supported for Windows XP and newer
774 ** Changes in autorevert.el
777 *** If Emacs is compiled with file notification support, notifications
778 are used instead of checking the time stamp of the files. You can
779 disable this by setting the user option `auto-revert-use-notify' to
780 nil. Alternatively, a regular expression of directories to be
781 excluded from file notifications can be specified by
782 `auto-revert-notify-exclude-dir-regexp'.
785 *** The new user option `auto-revert-remote-files' enables reversion
786 of remote files when set to non-nil.
790 *** The function `face-spec-set' is now analogous to `setq' for face specs.
791 Its third arg now accepts values specifying exactly which face spec to
792 set (defface, custom, or user spec), and it directly sets the relevant
793 property using the supplied face spec.
795 *** Face specs set via Custom themes now replace the `defface' spec
796 rather than inheriting from it (as do face specs set via Customize).
798 *** New face characteristic (supports :underline (:style wave))
799 specifies whether or not the terminal can display a wavy line.
801 *** New face spec attribute :distant-foreground
802 specifies foreground to use if background color is near the foreground
803 color that would otherwise have been used.
808 *** `image-animated-p' is now `image-multi-frame-p'.
809 It returns non-nil for any image that contains multiple frames,
810 whether or not it specifies a frame delay.
813 *** When animating images that do not specify a frame delay,
814 Emacs uses `image-default-frame-delay'.
817 *** New functions `image-current-frame' and `image-show-frame' for getting
818 and setting the current frame of a multi-frame image.
820 *** You can change the speed of animated images.
822 ** Changes in encoding and decoding of text
825 *** New coding-system `prefer-utf-8'.
826 This is like `undecided' but prefers UTF-8 on decoding if the text to
827 be decoded does not contain any invalid UTF-8 sequences. On encoding,
828 any non-ASCII characters are automatically encoded as UTF-8.
831 *** New attributes of coding-systems whose type is `undecided'.
832 Two new attributes, `:inhibit-null-byte-detection' and
833 `:inhibit-iso-escape-detection', determine how to detect encoding of
834 text that includes null bytes and ISO-2022 escape sequences,
835 respectively. Each of these attributes can be either nil, zero, or
836 t. If it is t, decoding text ignores null bytes and, respectively,
837 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
838 with no-conversion and ISO-2022 sequences cause Emacs to assume the
839 text is encoded in one of the ISO-2022 encodings, such as
840 iso-2022-7bit. If the value is zero, Emacs consults the variables
841 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
843 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
844 UTF-8 encoding and decoding, whenever possible.
846 These attributes are only meaningful for coding-systems of type
847 `undecided'. (The type of a coding-system is determined by its
848 `:coding-type' attribute and can be accessed by calling the
849 `coding-system-type' function.)
851 ** The function `set-visited-file-modtime' now accepts a 0 or -1 argument
852 with the same interpretation as the returned value of `visited-file-modtime'.
854 ** time-to-seconds is not obsolete any more.
855 ** New functions special-form-p and macrop.
856 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
857 text-property on the first char.
859 ** The `defalias-fset-function' property lets you catch calls to defalias
860 and redirect them to your own function instead of `fset'.
862 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
863 When you edit DIR/FILE, Emacs normally creates a symbolic link
864 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
865 is being edited. Formerly, if there was already a non-symlink file
866 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
867 through DIR/.#FILE.9. These fallbacks have been removed, so that
868 Emacs now no longer locks DIR/FILE in that case.
870 On file systems that do not support symbolic links, the lock is now a
871 regular file with contents being what would have been in the symlink.
873 ** The 9th element returned by `file-attributes' is now unspecified.
874 Formerly, it was t if the file's gid would change if file were deleted
875 and recreated. This value has been inaccurate for years on many
876 platforms, and nobody seems to have noticed or cared.
878 ** The function `file-ownership-preserved-p' now has an optional
879 argument GROUP which causes it check for file group too. This can be
880 used in place of the 9th element of `file-attributes'.
882 ** New functions `group-gid' and `group-real-gid'.
884 ** The 6th argument to `copy-file' has been renamed to
885 `preserve-extended-attributes' as it now handles both SELinux context
888 ** The `common-substring' argument of display-completion-list is obsolete.
889 Either use `completion-all-completions' which already returns highlighted
890 strings (including for partial or substring completion) or call
891 `completion-hilit-commonality' to add the highlight.
893 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
895 *** The package descriptor and name of global variables, constants,
896 and functions should be separated by two hyphens if the symbol is not
897 meant to be used by other packages.
900 * Changes in Emacs 24.4 on Non-Free Operating Systems
902 ** The procedure for building Emacs on MS-Windows has changed.
903 It is now built by running the same configure script as on all other
904 platforms. This requires the MSYS environment and MinGW development
905 tools. See the updated instructions in nt/INSTALL for details.
907 Using the Posix configure script and Makefile's also means a change in
908 the directory structure of the Emacs installation on Windows. It is
909 now the same as on GNU and Unix systems. In particular, the auxiliary
910 programs, such as cmdproxy.exe and hexl.exe, are in
911 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
912 version), version-independent site-lisp is in share/emacs/site-lisp,
913 version-specific Lisp files are in share/emacs/VERSION/lisp and in
914 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
915 files are in share/emacs/VERSION/etc. (Emacs knows about all these
916 directories and will find the files in there automatically; there's no
917 need to set any variables due to this change.)
920 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
921 The backtrace is written to the 'emacs_backtrace.txt' file in the
922 directory where Emacs was running.
925 ** The variable `buffer-file-type' is no longer supported.
926 Setting it has no effect, and %t in the mode-line format is ignored.
927 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
928 modifying it has no effect.
931 ** Lock files now work on MS-Windows.
932 This allows to avoid losing your edits if the same file is being
933 edited in another Emacs session or by another user. See the node
934 "Interlocking" in the Emacs User Manual for the details. To disable
935 file locking, customize `create-lockfiles' to nil.
937 ** Improved fullscreen support on Mac OS X.
938 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
939 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
940 native is the default.
943 * Installation Changes in Emacs 24.3
945 ** The default X toolkit is now Gtk+ version 3.
946 If you don't pass `--with-x-toolkit' to configure, or if you use
947 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
948 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
949 You can explicitly require a specific version by passing
950 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
952 ** New configure option `--enable-link-time-optimization', to utilize
953 an appropriate feature provided by GCC since version 4.5.0.
955 ** New configure option `--without-all' to disable most of the optional
956 features (image support, etc.) that are normally enabled by default.
958 ** New configure option `--enable-gcc-warnings' (for developing/debugging
959 Emacs). If building with GCC, this enables compile-time checks that
960 warn/give errors about possibly-questionable C code. On a recent GNU
961 system there should be no warnings; on older and on non-GNU systems
962 the results may be useful to developers.
964 ** The configure option `--enable-use-lisp-union-type' has been
965 renamed to `--enable-check-lisp-object-type', as the resulting
966 Lisp_Object type no longer uses a union to implement the compile time
967 check that this option enables.
969 ** The configure option `--disable-maintainer-mode' has been removed,
970 as it was confusingly-named and rarely useful.
972 ** The configure options `--program-prefix', `--program-suffix', and
973 `--program-transform-name' apply to more than just the installed
974 binaries. Now they also affect the man pages, icons, and the
975 etc/emacs.desktop file; but not the info pages, since this would break
976 links between the various manuals.
978 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
979 overwriting "emacs" in the installation bin/ directory with a link
982 ** Emacs uses libtinfo in preference to libncurses, if available.
984 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
985 /usr/pkg/lib to the linker search path. You must add them yourself if
988 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
989 (from the bin and libexec directories, respectively). The former is
990 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
993 * Startup Changes in Emacs 24.3
995 ** Emacs no longer searches for `leim-list.el' files beneath the standard
996 lisp/ directory. There should not be any there anyway. If you have
997 been adding them there, put them somewhere else; e.g., site-lisp.
999 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1002 * Changes in Emacs 24.3
1006 *** `C-h f' (`describe-function') can now perform autoloading.
1007 When this command is called for an autoloaded function whose docstring
1008 contains a key substitution construct, that function's library is
1009 automatically loaded, so that the documentation can be shown
1010 correctly. To disable this, set `help-enable-auto-load' to nil.
1012 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1013 even after their associated libraries have been loaded (and the
1014 autoloads have been redefined as functions).
1018 *** Images displayed via ImageMagick now support transparency and the
1019 :background image specification property.
1021 *** When available, ImageMagick support is automatically enabled.
1022 It is no longer necessary to call `imagemagick-register-types'
1023 explicitly to install ImageMagick image types; that function is called
1024 automatically at startup, or when customizing an imagemagick- option.
1026 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1027 ImageMagick to view images. (You must call `imagemagick-register-types'
1028 afterwards if you do not use customize to change this.)
1030 *** The new variable `imagemagick-enabled-types' also affects which
1031 ImageMagick types are treated as images. The function
1032 `imagemagick-filter-types' returns the list of types that will be
1035 *** ImageMagick images now support the :max-width and :max-height
1038 *** Some data types aren't auto-detected by ImageMagick. Adding
1039 :format to `create-image' may help if the content type is in the
1040 new variable `image-format-suffixes'.
1044 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1045 next and previous path separator, respectively.
1047 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1048 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1049 non-nil before enabling the mode.
1053 *** New option `mode-line-default-help-echo' specifies the help text
1054 (shown in a tooltip or in the echo area) for any part of the mode line
1055 that does not have its own specialized help text.
1057 *** You can now click mouse-3 in the coding system indicator to invoke
1058 `set-buffer-file-coding-system'.
1060 ** Server and client
1062 *** emacsclient now obeys string values for `initial-buffer-choice',
1063 if it is told to open a new frame without specifying any file to visit
1064 or expression to evaluate.
1066 *** New option `server-auth-key' specifies a shared server key.
1068 ** Emacs now generates backtraces on fatal errors.
1069 On encountering a fatal error, Emacs now outputs a textual description
1070 of the fatal signal, and a short backtrace on platforms like glibc
1071 that support backtraces.
1073 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1074 This minor mode replaces `toggle-read-only', which is now obsolete.
1076 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1077 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1078 respectively, without exiting from the prompt.
1080 ** In the Package Menu, newly-available packages are listed as "new",
1081 and sorted above the other "available" packages by default.
1083 ** If your Emacs was built from a bzr checkout, the new variable
1084 `emacs-bzr-version' contains information about the bzr revision used.
1086 ** New option `create-lockfiles' specifies usage of lockfiles.
1087 It defaults to t. Changing it to nil inhibits the creation of lock
1088 files (use this with caution).
1090 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1091 variables on remote hosts.
1093 ** The entry for PCL-CVS has been removed from the Tools menu.
1094 The PCL-CVS commands are still available via the keyboard.
1096 ** Using "unibyte: t" in Lisp source files is obsolete.
1097 Use "coding: raw-text" instead.
1099 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1100 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1101 The previous binding, introduced in Emacs 24.1, was a mistake, because
1102 `C-c LETTER' bindings are reserved for user customizations.
1104 ** Internationalization
1106 *** New language environment: Persian.
1108 *** New input method `vietnamese-vni'.
1110 ** Nextstep (GNUstep / Mac OS X) port
1112 *** Support for fullscreen and the frame parameter fullscreen.
1114 *** A file dialog is used for open/save operations initiated from the
1118 * Editing Changes in Emacs 24.3
1120 ** Search and Replace
1122 *** Non-regexp Isearch now performs "lax" space matching.
1123 Each sequence of spaces in the supplied search string may match any
1124 sequence of one or more whitespace characters, as specified by the
1125 variable `search-whitespace-regexp'. (This variable is also used by a
1126 similar existing feature for regexp Isearch.)
1128 *** New Isearch command `M-s SPC' toggles lax space matching.
1129 This applies to both ordinary and regexp Isearch.
1131 *** New option `replace-lax-whitespace'.
1132 If non-nil, `query-replace' uses flexible whitespace matching too.
1135 *** Global `M-s _' starts a symbol (identifier) incremental search,
1136 and `M-s _' in Isearch toggles symbol search mode.
1137 `M-s c' in Isearch toggles search case-sensitivity.
1139 ** Navigation commands
1141 *** New binding `M-g c' for `goto-char'.
1143 *** New binding `M-g TAB' for `move-to-column'.
1145 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1146 interactively with no prefix arg. Previously, it moved to column 1.
1148 ** New option `yank-handled-properties' allows processing of text
1149 properties on yanked text, in ways that are more general than just
1150 removing them (as is done by `yank-excluded-properties').
1152 ** New option `delete-trailing-lines' specifies whether
1153 M-x delete-trailing-whitespace should delete trailing lines at the end
1154 of the buffer. It defaults to t.
1156 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1158 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1159 `ucs-insert' is now an obsolete alias for `insert-char'.
1161 ** The `z' key no longer has a binding in most special modes.
1162 It used to be bound to `kill-this-buffer', but `z' is too easy to
1165 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1166 It copies the region-rectangle as the last rectangle kill.
1170 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1172 *** New option `register-separator' specifies the register containing
1173 the text to put between collected texts for use with
1174 M-x append-to-register and M-x prepend-to-register.
1177 * Changes in Specialized Modes and Packages in Emacs 24.3
1179 ** Common Lisp emulation (CL)
1181 *** CL's main entry is now (require 'cl-lib).
1182 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1183 i.e., all its definitions have the "cl-" prefix (and internal definitions
1184 use the "cl--" prefix).
1186 If `cl' provided a feature under the name `foo', then `cl-lib'
1187 provides it under the name `cl-foo' instead; with the exceptions of the
1188 few `cl' definitions that had to use `foo*' to avoid conflicts with
1189 pre-existing Elisp entities. These have been renamed to `cl-foo'
1190 rather than `cl-foo*'.
1192 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1193 provide the old, non-prefixed names. Some exceptions are listed below:
1195 *** `cl-flet' is not like `flet' (which is deprecated).
1196 Instead it obeys the behavior of Common-Lisp's `flet'.
1197 In particular, in cl-flet function definitions are lexically scoped,
1198 whereas in flet the scoping is dynamic.
1200 *** `cl-labels' is slightly different from `labels'.
1201 The difference is that it relies on the `lexical-binding' machinery
1202 (as opposed to the `lexical-let' machinery used previously) to capture
1203 definitions in closures, so such closures will only work if `lexical-binding'
1206 *** `cl-letf' is not exactly like `letf'.
1207 The only difference is in details that relate to some deprecated usage
1208 of `symbol-function' in place forms.
1210 *** `progv' was rewritten to use the `let' machinery.
1211 A side effect is that variables without corresponding values are bound
1212 to nil rather than being made unbound.
1214 *** The following methods of extending `setf' are obsolete
1215 (use features from gv.el instead):
1216 `define-modify-macro' (use `gv-letplace')
1217 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1218 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1219 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1223 *** Changes are now highlighted using the same color scheme as in
1224 modern VCSes. Deletions are displayed in red (new faces
1225 `diff-refine-removed' and `smerge-refined-removed', and new definition
1226 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1227 and `smerge-refined-added', and new definition of `diff-added').
1229 *** The variable `diff-use-changed-face' defines whether to use the
1230 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1231 changes in context diffs.
1233 *** The new command `diff-delete-trailing-whitespace' removes trailing
1234 whitespace introduced by a diff.
1236 ** Ediff now uses the same color scheme as Diff mode.
1240 A new version of python.el, which provides several new features, including:
1241 per-buffer shells, better indentation, Python 3 support, and improved
1242 shell-interaction compatible with iPython (and virtually any other
1245 *** Some user options have been replaced/renamed, including (old -> new):
1246 **** python-indent -> python-indent-offset
1247 **** python-guess-indent -> python-indent-guess-indent-offset
1248 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1249 **** python-use-skeletons -> python-skeleton-autoinsert
1251 *** Some user options have been removed, including:
1253 **** `python-indent-string-contents': Strings are never indented.
1255 **** `python-honour-comment-indentation':
1256 Comments are always considered as indentation markers.
1258 **** `python-continuation-offset': Indentation is automatically
1259 calculated in a pep8 compliant way depending on the context.
1261 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1262 Have no direct mapping as the shell interaction is completely different.
1264 **** `python-python-command', `python-jython-command':
1265 Replaced by `python-shell-interpreter'.
1267 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1268 `python-pdbtrack-minor-mode-string', `python-source-modes':
1271 *** Some commands have been replaced (old -> new):
1272 **** python-insert-class -> python-skeleton-class
1273 **** python-insert-def -> python-skeleton-def
1274 **** python-insert-for -> python-skeleton-for
1275 **** python-insert-if -> python-skeleton-if
1276 **** python-insert-try/except -> python-skeleton-try
1277 **** python-insert-try/finally -> python-skeleton-try
1278 **** python-insert-while -> python-skeleton-while
1279 **** python-find-function -> python-nav-jump-to-defun
1280 **** python-next-statement -> python-nav-forward-sentence
1281 **** python-previous-statement -> python-nav-backward-sentence
1282 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1283 **** python-end-of-defun-function -> python-nav-end-of-defun
1284 **** python-send-buffer -> python-shell-send-buffer
1285 **** python-send-defun -> python-shell-send-defun
1286 **** python-send-region -> python-shell-send-region
1287 **** python-send-region-and-go -> emulate with python-shell-send-region
1288 and python-shell-switch-to-shell
1289 **** python-send-string -> python-shell-send-string
1290 **** python-switch-to-python -> python-shell-switch-to-shell
1291 **** python-describe-symbol -> python-eldoc-at-point
1295 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1297 *** The D-Bus object manager interface is implemented.
1299 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1300 if their value does not fit into Emacs's integer range.
1302 *** The function `dbus-call-method' is now non-blocking.
1303 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1305 *** Signals can also be sent as unicast messages.
1307 *** The argument list of `dbus-register-signal' has been extended,
1308 according to the new match rule types of D-Bus.
1310 *** `dbus-init-bus' supports private connections.
1312 *** There is a new function `dbus-setenv'.
1314 ** `desktop-path' no longer includes the "." directory.
1315 Desktop files are now located in ~/.emacs.d by default.
1319 *** `dired-do-async-shell-command' executes each file sequentially
1320 if the command ends in `;' (when operating on multiple files).
1321 Otherwise, it executes the command on each file in parallel.
1323 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1324 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1327 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1328 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1329 mark/unmark/flag all files in the active region.
1331 *** The minibuffer default for `=' (`dired-diff') has changed.
1332 It is now the backup file for the file at point, if one exists.
1333 In Transient Mark mode the default is the file at the active mark.
1335 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1336 The global binding for `M-=', `count-words-region' is in effect.
1340 *** New module "notifications", which can send a notification when you
1341 receive a private message or your nickname is mentioned.
1343 *** ERC will look up server/channel names via auth-source and use any
1346 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1347 only applies to messages sent by lurkers.
1349 ** reStructuredText mode
1351 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1352 fontification, comment handling, and customization have all been revised
1355 *** Support for `imenu' and `which-function-mode'.
1357 *** The reStructuredText syntax is more closely covered.
1358 Sphinx support has been improved.
1360 *** `rst-insert-list' inserts new list or continues existing lists.
1362 *** A negative prefix argument always works for `rst-adjust'.
1364 *** The window configuration is reset after displaying a TOC.
1366 *** The constant `rst-version' describes the rst.el package version.
1370 *** Support for percent literals and recognition of regular expressions
1371 in method calls without parentheses with more methods, including Cucumber
1374 *** Improved syntax highlighting and indentation.
1376 *** New command `ruby-toggle-block', bound to `C-c {'.
1378 *** Some non-standard keybindings/commands have been removed:
1380 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1382 **** `ruby-mark-defun'; use `mark-defun'.
1384 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1385 appropriate settings for the variables `beginning-of-defun-function'
1386 and `end-of-defun-function'.
1388 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1389 `reindent-then-newline-and-indent' and `newline' have been removed.
1391 ** Shell Script mode
1393 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1395 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1397 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1401 *** The free software compiler GHDL is supported (and now the default).
1403 *** Support for the VHDL-AMS packages has been added/updated.
1405 *** Updated to the 2002 revision of the VHDL standard.
1407 *** Accepts \r and \f as whitespace.
1411 *** The faces used by Apropos are now directly customizable.
1412 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1413 see the `apropos' Custom group for details.
1415 *** The old options whose values specified faces to use have been removed
1416 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1420 *** This package has been rewritten to use Tabulated List mode.
1422 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1423 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1427 *** Algebraic simplification mode is now the default.
1428 To restrict to the limited simplifications given by the former
1429 default simplification mode, use `m I'.
1433 *** You can customize the header text that appears above each calendar month.
1434 See the variable `calendar-month-header'.
1436 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1438 *** The calendars produced by cal-html include holidays.
1439 Customize `cal-html-holidays' to change this.
1443 *** The major modes from the parser generators "Bovine" and "Wisent"
1444 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1445 are in `auto-mode-alist', and the corresponding manuals are included.
1449 **** Menu support for the "Configuration" feature. This allows users to
1450 choose the active configuration (such as debug or install) from the menu.
1452 **** New command `ede-set' to interactively set project-local variables.
1454 **** Support for compiling, debugging, and running in "generic" projects.
1456 **** Autoconf editing support for M4 macros with complex arguments.
1458 **** Compilation support for the "linux" project type.
1460 **** "simple" projects have been removed; use "generic" projects instead.
1464 **** Support for parsing #include statements inside a namespace in C/C++.
1466 **** Improved support for 'extern "C"' declarations in C/C++.
1468 **** The ability to ignore more common special C/C++ preprocessor symbols,
1469 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1470 If available, include cdefs.h as an additional source of preprocessor symbols.
1472 **** Improved C/C++ function pointer parsing.
1474 **** In Python, support for converting imports to include file names.
1476 **** Ability to dynamically determine the Python load path.
1478 **** Support for the Python 'WITH' and 'AT' keywords.
1480 **** Improved tooltip completion.
1484 **** The SRecode manual is now included.
1486 **** Tag generation supports constructor/destructor settings and system
1487 include differentiation.
1489 **** Addition of 'Framework' support: Frameworks are specified when a
1490 particular kind of library (such as Android) is needed in a common language
1493 **** Support for nested templates and let variables override based on priority.
1495 **** Support for merging tables from multiple related modes, such as
1496 default -> c++ -> arduino.
1498 ** Compile has a new option `compilation-always-kill'.
1502 *** `custom-reset-button-menu' now defaults to t.
1504 *** Non-option variables are never matched in `customize-apropos' and
1505 `customize-apropos-options' (i.e., the prefix argument does nothing for
1506 these commands now).
1510 *** The variables `term-default-fg-color' and `term-default-bg-color'
1511 are now deprecated in favor of the customizable face `term'.
1513 *** You can customize how to display ANSI terminal colors and styles
1514 by customizing the corresponding `term-color-<COLOR>',
1515 `term-color-underline' and `term-color-bold' faces.
1519 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1521 *** Remote processes are now also supported on remote MS-Windows hosts.
1525 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1526 Previously, this slot stored semicolon-separated attribute-value pairs
1527 appended to some imap URLs, but this is not compatible with RFC 3986.
1528 So now the `filename' slot stores the entire path and query components,
1529 and the `attributes' slot is always nil.
1531 *** New function `url-encode-url' for encoding a URI string.
1532 The `url-retrieve' function now uses this to encode its URL argument,
1533 in case that is not properly encoded.
1535 *** New command `url-cookie-list' displays all the current cookies, and
1536 allows deleting selected cookies.
1538 ** notifications.el supports now version 1.2 of the Notifications API.
1539 The function `notifications-get-capabilities' returns the supported
1542 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1543 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1544 `flymake-warning-bitmap'.
1546 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1547 specifying URL types that should be converted to remote file names at
1548 the FFAP prompt. The default is now '("ftp").
1550 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1551 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1553 ** New option `mouse-avoidance-banish-position' specifies where the
1554 `banish' mouse avoidance setting moves the mouse.
1556 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1557 closing brackets to be aligned with the line of the opening bracket.
1559 ** In Proced mode, new command `proced-renice' renices marked processes.
1561 ** New option `async-shell-command-buffer' specifies the buffer to use
1562 for a new asynchronous `shell-command' when the default output buffer
1563 `*Async Shell Command*' is already in use.
1565 ** SQL mode has a new option `sql-db2-escape-newlines'.
1566 If non-nil, newlines sent to the command interpreter will be escaped
1567 by a backslash. The default does not escape the newlines and assumes
1568 that the sql statement will be terminated by a semicolon.
1570 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1571 (and modes that derive from it), sorts the column at point, or the Nth
1572 column if a numeric prefix argument is given.
1574 ** `which-func-modes' now defaults to t, so Which Function mode, when
1575 enabled, applies to all applicable major modes.
1577 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1580 ** Follow mode no longer works by using advice.
1581 The option `follow-intercept-processes' has been removed.
1583 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1585 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1586 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1587 *** semantic-change-hooks -> semantic-change-functions
1588 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1589 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1590 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1591 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1592 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1593 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1594 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1595 *** rcirc-activity-hooks -> rcirc-activity-functions
1596 *** rcirc-print-hooks -> rcirc-print-functions
1597 *** dbus-event-error-hooks -> dbus-event-error-functions
1598 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1599 *** checkdoc-style-hooks -> checkdoc-style-functions
1600 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1601 *** archive-extract-hooks -> archive-extract-hook
1602 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1603 *** hfy-post-html-hooks -> hfy-post-html-hook
1604 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1605 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1606 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1607 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1609 ** Obsolete packages
1612 In most cases, assoc+member+push+delq work just as well.
1613 And in any case it's just a terrible package: ugly semantics, terrible
1614 inefficiency, and not namespace-clean.
1623 * Incompatible Lisp Changes in Emacs 24.3
1625 ** Docstrings starting with `*' no longer indicate user options.
1626 Only variables defined using `defcustom' are considered user options.
1627 The function `user-variable-p' is now an obsolete alias for
1628 `custom-variable-p'.
1630 ** The return values of `defalias', `defun' and `defmacro' have changed,
1631 and are now undefined. For backwards compatibility, `defun' and
1632 `defmacro' currently return the name of the newly defined
1633 function/macro, but this should not be relied upon.
1635 ** `random' by default now returns a different random sequence in
1636 every Emacs run. Use `(random S)', where S is a string, to set the
1637 random seed to a value based on S, in order to get a repeatable
1638 sequence in later calls.
1640 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1641 that substring is inserted literally even if the LITERAL arg is
1642 non-nil, instead of causing an error to be signaled.
1644 ** `select-window' now always makes the window's buffer current.
1645 It does so even if the window was selected before.
1647 ** The function `x-select-font' can return a font spec, instead of a
1648 font name as a string. Whether it returns a font spec or a font name
1649 depends on the graphical library.
1651 ** `face-spec-set' no longer sets frame-specific attributes when the
1652 third argument is a frame (that usage was obsolete since Emacs 22.2).
1654 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1656 ** The CL package's `get-setf-method' function no longer exists.
1657 Generalized variables are now part of core Emacs Lisp, and implemented
1658 differently to the way cl.el used to do it. It is not possible to
1659 define a compatible replacement for `get-setf-method'. See the file
1660 gv.el for internal details of the new implementation.
1662 ** The arguments of `dbus-register-signal' are no longer just strings,
1663 but keywords or keyword-string pairs. The old argument list will
1664 still be supported for Emacs 24.x.
1666 ** Miscellaneous name changes
1667 Some Lisp symbols have been renamed to correct their spelling,
1668 or to be more consistent with standard Emacs terminology.
1670 *** Renamed functions
1671 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1672 **** inactivate-input-method -> deactivate-input-method
1673 **** quail-inactivate -> quail-deactivate
1674 **** robin-inactivate -> robin-deactivate
1675 **** viper-inactivate-input-method -> viper-deactivate-input-method
1676 **** viper-inactivate-input-method-action ->
1677 viper-deactivate-input-method-action
1678 **** ucs-input-inactivate -> ucs-input-deactivate
1681 The old hooks are still supported for backward compatibility, but they
1682 are deprecated and will be removed eventually.
1683 **** input-method-inactivate-hook -> input-method-deactivate-hook
1684 **** robin-inactivate-hook -> robin-deactivate-hook
1685 **** quail-inactivate-hook -> quail-deactivate-hook
1687 *** Renamed variables
1688 **** follow-deactive-menu -> follow-inactive-menu
1689 **** inactivate-current-input-method-function ->
1690 deactivate-current-input-method-function
1692 ** Some obsolete functions, variables, and faces have been removed:
1693 *** `last-input-char', `last-command-char', `unread-command-char'
1694 *** `facemenu-unlisted-faces'
1695 *** `rmail-decode-mime-charset'
1696 *** `iswitchb-read-buffer'
1697 *** `sc-version', `sc-submit-bug-report'
1698 *** `set-char-table-default'
1699 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1700 *** `compile-internal'
1702 *** `mode-line-inverse-video'
1703 *** `follow-mode-off-hook'
1704 *** `cvs-commit-buffer-require-final-newline'
1705 (use `log-edit-require-final-newline' instead)
1706 *** `cvs-changelog-full-paragraphs'
1707 (use `log-edit-changelog-full-paragraphs' instead)
1708 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1709 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1710 *** `vc-master-templates' (use `vc-handled-backends' instead)
1711 *** `vc-checkout-carefully'
1714 * Lisp Changes in Emacs 24.3
1716 ** CL-style generalized variables are now in core Elisp.
1717 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1718 You can define your own generalized variables using `gv-define-simple-setter',
1719 `gv-define-setter', etc.
1721 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1722 This can significantly speed up execution of non-byte-compiled code,
1723 but can also bump into previously unnoticed cyclic dependencies.
1724 These are generally harmless: they will simply cause the macro calls
1725 to be left for later expansion (as before), but will result in a
1726 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1727 You may wish to restructure your code so this does not happen.
1729 ** New sampling-based Elisp profiler.
1730 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1731 When finished, use M-x profiler-stop. The sampling rate can be based on
1732 CPU time or memory allocations.
1734 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1735 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1737 ** New macros `setq-local' and `defvar-local'.
1739 ** Face underlining can now use a wave.
1741 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1742 of `read-regexp' accepts a string ending with a colon and space, and its
1743 second argument DEFAULTS can be a list of strings accessible via `M-n'
1744 in the minibuffer ahead of other hard-coded useful regexp-related values.
1745 More commands use `read-regexp' now to read their regexp arguments.
1749 *** New function `completion-table-with-quoting' to handle completion
1750 in the presence of quoting, such as file completion in shell buffers.
1752 *** New function `completion-table-subvert' to use an existing completion
1753 table, but with a different prefix.
1757 *** New error type and new function `user-error'.
1758 These do not trigger the debugger.
1760 *** New option `debugger-bury-or-kill', saying what to do with the
1761 debugger buffer when exiting debug.
1763 *** Set `debug-on-message' to enter the debugger when a certain
1764 message is displayed in the echo area. This can be useful when trying
1765 to work out which code is doing something.
1767 *** New var `inhibit-debugger', automatically set to prevent accidental
1768 recursive invocations.
1772 *** New command `fit-frame-to-buffer' adjusts the frame height to
1775 *** The command `fit-window-to-buffer' can adjust the frame height
1776 if the new option `fit-frame-to-buffer' is non-nil.
1778 *** New macro `with-temp-buffer-window', similar to
1779 `with-output-to-temp-buffer'.
1781 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1784 *** New option `switch-to-buffer-preserve-window-point' to restore a
1785 window's point when switching buffers.
1787 *** New display action alist entries `window-height' and `window-width'
1788 specify the size of new windows created by `display-buffer'.
1790 *** New display action alist entry `pop-up-frame-parameters', if
1791 non-nil, specifies frame parameters to give any newly-created frame.
1793 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1794 tells display action functions to avoid changing which frame is
1797 *** New display action alist entry `previous-window', if non-nil,
1798 specifies window to reuse in `display-buffer-in-previous-window'.
1800 *** New display action functions `display-buffer-below-selected',
1801 and `display-buffer-in-previous-window'.
1803 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1804 now accept a third argument to avoid choosing the selected window.
1806 *** Additional values recognized for option `window-combination-limit'.
1808 *** The following variables are obsolete, as they can be replaced by
1809 appropriate entries in the `display-buffer-alist' function introduced
1811 **** `dired-shrink-to-fit'
1812 **** `display-buffer-reuse-frames'
1813 **** `display-buffer-function'
1814 **** `special-display-buffer-names'
1815 **** `special-display-frame-alist'
1816 **** `special-display-function'
1817 **** `special-display-regexps'
1821 *** `current-time-string' no longer requires that its argument's year
1822 must be in the range 1000..9999. It now works with any year supported
1823 by the underlying C implementation.
1825 *** `current-time' now returns extended-format time stamps
1826 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1827 PSEC is typically a multiple of 1000 on current machines. Other
1828 functions that use this format, such as `file-attributes' and
1829 `format-time-string', have been changed accordingly. Old-format time
1830 stamps are still accepted.
1832 *** The format of timers in `timer-list' and `timer-idle-list' is now
1833 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1834 The PSECS slot is new, and uses picosecond resolution. It can be
1835 accessed via the new `timer--psecs' accessor.
1837 *** Last-modified time stamps in undo lists now are of the form
1838 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1842 *** Improved security when handling persistent objects:
1844 **** `eieio-persistent-read' now features optional arguments for specifying
1845 the class to load, as well as a flag stating whether subclasses are allowed;
1846 if provided, other classes will be rejected by the reader. For
1847 compatibility with existing code, if the class is omitted only a
1850 **** New specialized reader for pulling in classes and signaling errors
1851 without evaluation of suspicious code.
1853 **** All slots that contain objects must have a :type. Slots with lists
1854 of objects must use a new type predicate for a list of an object type.
1856 *** Support for `find-function' and similar utilities, through the addition
1857 of filename support to generated symbols.
1859 ** Floating point functions now always return special values like NaN,
1860 instead of signaling errors, if given invalid args; e.g., (log -1.0).
1861 Previously, they returned NaNs on some platforms but signaled errors
1862 on others. The affected functions are acos, asin, tan, exp, expt,
1863 log, log10, sqrt, and mod.
1865 ** New fringe bitmap `exclamation-mark'.
1867 ** Miscellaneous changes to special forms and macros
1869 *** `defun' and `defmacro' are now macros rather than special forms.
1871 *** `kbd' is now a function rather than a macro.
1873 ** Miscellaneous new functions
1875 *** `set-temporary-overlay-map' sets up a temporary keymap that
1876 takes precedence over most other maps for a short while (normally one key).
1878 *** `autoloadp' tests if its argument is an autoloaded object.
1880 *** `autoload-do-load' performs the autoloading operation.
1882 *** `buffer-narrowed-p' tests if the buffer is narrowed.
1884 *** `file-name-base' returns a file name sans directory and extension.
1886 *** `function-get' fetches a function property, following aliases.
1888 *** `posnp' tests if an object is a `posn'.
1890 *** `system-users' returns the user names on the system.
1892 *** `system-groups' returns the group names on the system.
1894 *** `tty-top-frame' returns the topmost frame of a text terminal.
1896 ** The following functions and variables are obsolete:
1897 *** `automount-dir-prefix' (use `directory-abbrev-alist')
1898 *** `buffer-has-markers-at'
1899 *** `macro-declaration-function' (use `macro-declarations-alist')
1900 *** `window-system-version' (provides no useful information)
1901 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
1902 *** `query-replace-interactive'
1903 *** `font-list-limit' (has had no effect since Emacs < 23)
1906 * Changes in Emacs 24.3 on Non-Free Operating Systems
1908 ** Cygwin builds can use the native MS Windows user interface.
1909 Pass `--with-w32' to configure. The default remains the X11 interface.
1911 ** Two new functions are available in Cygwin builds:
1912 `cygwin-convert-file-name-from-windows' and
1913 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
1914 code to access the Cygwin file-name mapping machinery to convert
1915 between Cygwin and Windows-native file and directory names.
1917 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
1918 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
1919 `mouse-autoselect-window'.
1921 ** On MS Windows Vista and later Emacs now supports symbolic links.
1923 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
1924 support for libxml2, even if its presence is detected.
1926 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1928 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
1929 directories to the search path. You must add them yourself if you want them.
1932 * Changes in Emacs 24.2
1934 ** This is mainly a bug-fix release.
1937 * Installation Changes in Emacs 24.1
1939 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1940 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1941 also depend on Gtk+. You can disable them with --without-rsvg and
1944 ** Emacs can be compiled with GnuTLS support.
1945 This happens by default if a suitably recent version of the library is
1946 found at build time. To prevent this, use the configure option
1947 `--without-gnutls'. See below for GnuTLS features.
1949 ** Emacs can be compiled with SELinux support.
1950 This happens by default if a suitably recent version of the library is
1951 found at build time. To prevent this, use the configure option
1952 `--without-selinux'. See below for SELinux features.
1954 ** Emacs can be compiled with ImageMagick support.
1955 This happens by default if a suitably recent version of the library is
1956 found at build time. To prevent this, use the configure option
1957 `--without-imagemagick'. See below for ImageMagick features.
1958 This feature is not available for the Nextstep or MS ports.
1960 ** Emacs can be compiled with libxml2 support.
1961 This happens by default if a suitably recent version of the library is
1962 found at build time. To prevent this, use the configure option
1963 `--without-xml2'. See below for libxml2 features.
1965 ** By default, the installed Info and man pages are compressed.
1966 You can disable this by configuring --without-compress-info.
1968 ** New configure option --with-wide-int.
1969 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
1970 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1973 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
1974 These provide no new functionality, they just remove the need to edit
1975 lib-src/Makefile by hand in order to use the associated features.
1977 ** New configure option --enable-use-lisp-union-type.
1978 This is only useful for Emacs developers to debug certain types of bugs.
1979 This is not a new feature; only the configure flag is new.
1981 ** The standalone programs digest-doc and sorted-doc are removed.
1982 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1984 ** The standalone program `fakemail' is removed.
1985 If you need it, feedmail.el provides a superset of the functionality.
1988 * Startup Changes in Emacs 24.1
1990 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1991 command line arguments, and the EMACS_UNIBYTE environment variable, no
1992 longer have any effect. (They were declared obsolete in Emacs 23.)
1994 ** New command line option `--no-site-lisp' removes site-lisp directories
1995 from load-path. -Q now implies this. This option does not affect the
1996 EMACSLOADPATH environment variable (and hence has no effect for
2000 * Changes in Emacs 24.1
2004 *** Many packages now use the `completion-at-point' command,
2005 rather than implementing separate completion commands.
2007 *** `completion-at-point' now handles tags and semantic completion.
2009 *** Completion in a non-minibuffer now tries to detect the end of completion
2010 and pops down the *Completions* buffer accordingly.
2012 *** New option `completion-cycle-threshold' allows completion cycling.
2014 *** New option `completion-category-overrides' for overriding the
2015 default completion style in certain circumstances.
2017 *** New completion style `substring'.
2019 *** Completion of buffer names uses `substring' completion by default.
2021 *** The option `widget-complete-field' has been removed.
2025 *** The first time you try sending mail, Emacs asks for a mail method.
2026 This is implemented by a new default for `send-mail-function', which
2027 is `sendmail-query-once'. This offers to use the smtpmail package, or
2028 to use the old defaults relying on external mail facilities
2029 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2030 `mailclient-send-it' on Windows).
2032 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2033 transfers the report to your desktop's preferred mail client, if there
2034 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2037 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2038 and Mail mode changes
2040 ** Emacs server and client changes
2042 *** New option `server-port' specifies the port for TCP Emacs servers.
2044 *** New emacsclient argument -q/--quiet suppresses some status messages.
2046 *** New emacsclient argument --frame-parameters specifies the frame
2047 parameters of any newly-created graphical frame.
2049 *** If emacsclient shuts down due to Emacs signaling an error,
2050 its exit status is 1.
2052 *** New emacsclient argument --parent-id ID.
2053 This opens a client frame in parent X window ID, via XEmbed, similar
2054 to the --parent-id argument to Emacs.
2056 ** Internationalization changes
2058 *** Emacs now supports display and editing of bidirectional text.
2059 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2060 displayed in the correct visual order as expected by users of those
2061 scripts. The display reordering is a "full bidirectionality" class
2062 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2063 with no RTL text should look exactly the same as before.
2065 **** New buffer-local variable `bidi-display-reordering'.
2066 To disable display reordering in a buffer, change this to nil.
2068 **** New buffer-local variable `bidi-paragraph-direction'.
2069 If nil (the default), Emacs determines the base direction of each
2070 paragraph from its text, as specified by the UBA. Setting the value
2071 to `right-to-left' or `left-to-right' forces a base direction on each
2074 Paragraphs with right-to-left base direction are displayed starting at
2075 the right window edge.
2077 *** Enhanced support for characters with no glyphs in available fonts,
2078 or, on text terminals, characters that cannot be encoded by the
2079 terminal coding system. The new option `glyphless-char-display-control'
2080 specifies how to display them: as a hexadecimal code in a box, a thin
2081 1-pixel space, an empty box, etc.
2083 *** New input methods for Farsi and Bulgarian
2084 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2086 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2087 (U+2010 and U+2011).
2089 *** New Hebrew translation of the Emacs Tutorial.
2090 Type `C-u C-h t' to choose it in case your language setup doesn't
2091 automatically select it.
2093 ** An Emacs Lisp package manager is now included.
2094 This is a convenient way to download and install additional packages,
2095 from a package repository at http://elpa.gnu.org.
2097 *** M-x list-packages shows a list of packages, which can be
2098 selected for installation.
2100 *** New command `describe-package', bound to `C-h P'.
2102 *** By default, all installed packages are loaded automatically when
2103 Emacs starts up. To disable this, set `package-enable-at-startup' to
2104 nil. To specify the packages to load, customize `package-load-list'.
2106 ** Custom theme changes
2108 *** New command `M-x customize-themes', which provides a convenient
2109 interface for enabling and disabling Custom themes.
2111 *** New option `custom-theme-load-path' is the load path for themes.
2112 Emacs no longer looks for Custom themes in `load-path'. The default
2113 value of `custom-theme-load-path' says to look for themes in
2114 `custom-theme-directory', followed by a subdirectory of
2115 `data-directory' named "themes/", which contains a small selection of
2116 built-in Custom themes.
2118 *** New option `custom-safe-themes' records known-safe theme files.
2119 If a theme is not in this list, Emacs queries before loading it, and
2120 offers to save the theme to `custom-safe-themes' automatically. By
2121 default, all themes included in Emacs are treated as safe.
2123 ** Improved GTK integration
2125 *** GTK scroll-bars are now placed on the right by default.
2126 The function `set-scroll-bar-mode' can change this.
2128 *** GTK tool bars can have just text, just images or images and text.
2129 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2130 the default is taken from desktop settings.
2132 *** GTK tool bars can be placed on any edge of the frame.
2133 The frame-parameter tool-bar-position controls this. It takes the
2134 values top, left, right or bottom. The Options => Show/Hide menu has
2137 *** The default colors for selected text (the `region' face) are taken
2138 from the GTK theme when Emacs is built with GTK.
2140 *** Emacs uses GTK tooltips by default if built with GTK.
2141 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2143 ** Graphical interface changes
2145 *** On graphical displays, the mode-line no longer ends in dashes.
2146 Also, the first dash (which does not indicate anything) is just
2147 displayed as a space.
2149 *** `menu-bar-select-buffer-function' lets you choose another operation
2150 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2152 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2153 built with Xft. These fonts can be set via X resources, for example:
2154 Emacs.pane.menubar.font: Courier-12
2158 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2159 or if it receives a SIGINT signal in batch mode.
2161 *** `kill-emacs-hook' is now also run in batch mode.
2162 Third-party code which adds to `kill-emacs-hook' should check if they
2163 do the right thing in batch mode.
2165 ** Scrolling changes
2167 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2168 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2169 of buffer at first key-press (instead they move to top/bottom of buffer)
2170 when `scroll-error-top-bottom' is non-nil.
2172 *** New option `scroll-error-top-bottom' (see above).
2174 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2175 scroll a line instead of full screen.
2177 *** New property `scroll-command' should be set on a command's symbol to
2178 define it as a scroll command affected by `scroll-preserve-screen-position'.
2180 *** If you customize `scroll-conservatively' to a value greater than 100,
2181 Emacs will never recenter point in the window when it scrolls due to
2182 cursor motion commands or commands that move point (e.f., `M-g M-g').
2183 Previously, you needed to use `most-positive-fixnum' as the value of
2184 `scroll-conservatively' to achieve the same effect.
2186 *** "Aggressive" scrolling now honors the scroll margins.
2187 If you customize `scroll-up-aggressively' or
2188 `scroll-down-aggressively' and move point off the window, Emacs now
2189 scrolls the window so as to avoid positioning point inside the scroll
2192 ** Basic SELinux support has been added.
2193 This requires Emacs to be linked with libselinux at build time.
2195 *** Emacs preserves the SELinux file context when backing up.
2196 Also, the function `copy-file' has an extra optional argument for
2197 preserving SELinux context, and the return value of `backup-buffer'
2198 now includes the SELinux context.
2200 *** New functions `file-selinux-context' and `set-file-selinux-context'
2201 get and set the SELinux context of a file.
2205 *** `delete-by-moving-to-trash' now only affects commands that specify
2206 trashing. This avoids inadvertently trashing temporary files.
2208 *** Calling `delete-file' or `delete-directory' with a prefix argument
2209 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2211 ** File- and directory-local variable changes
2213 *** You can stop directory local vars from applying to subdirectories.
2214 Add an element (subdirs . nil) to the alist portion of any variables
2215 settings to indicate that the section should not apply to
2218 *** Directory local variables can apply to some file-less buffers.
2219 Affected modes include dired, vc-dir, and log-edit. For example,
2220 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2221 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2222 `hack-dir-local-variables-non-file-buffer' to support this.
2224 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2225 Instead, use "eval: (minor-mode 1)".
2227 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2228 to `inhibit-local-variables-regexps'. As the name suggests, it now
2229 applies to ALL file local variables, not just -*- lines. The
2230 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2235 *** The `quit-window' command now restores the last buffer displayed
2236 in the quitted window.
2238 *** Resizing an Emacs frame now preserves proportional window sizes,
2239 modulo restrictions like window minimum sizes and fixed-size windows.
2241 *** The behavior of `display-buffer' is now customizable in detail.
2243 **** New option `display-buffer-base-action' specifies a list of
2244 user-determined display "actions" (functions and optional arguments
2245 for choosing the displaying window).
2247 This takes precedence over the default display action, which is
2248 specified by `display-buffer-fallback-action'.
2250 **** New option `display-buffer-alist' maps buffer name regexps to
2251 display actions, taking precedence over `display-buffer-base-action'.
2253 *** New option `window-combination-limit'.
2254 The new option `window-combination-limit' allows to return the space
2255 obtained for resizing or creating a window more reliably to the window
2256 from which such space was obtained.
2258 *** New option `window-combination-resize'.
2259 The new option `window-combination-resize' allows to split a window that
2260 otherwise cannot be split because it's too small by stealing space from
2261 other windows in the same combination. Subsequent resizing or deletion
2262 of the window will resize all windows in the same combination as well.
2264 *** New option `frame-auto-hide-function' lets you choose between
2265 iconifying or deleting a frame when burying a buffer in a dedicated
2266 frame, or quitting a window showing a buffer in a frame of its own.
2268 *** New commands `maximize-window' and `minimize-window'.
2269 These maximize and minimize the size of a window within its frame.
2271 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2272 These functions allow to navigate through the live buffers that have
2273 been shown in a specific window.
2275 ** Minibuffer changes
2277 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2278 This is handy for minibuffer-only frames, and is also used for the feature
2279 where mouse-1 pops up *Messages*"', which can now easily be changed.
2281 *** Minibuffers set `truncate-lines' to nil.
2282 If you want to change the value to something else, you could use
2283 for example `minibuffer-setup-hook'.
2285 ** `auto-mode-case-fold' is now enabled by default.
2287 ** `backup-by-copying-when-mismatch' now defaults to t.
2289 ** New basic faces `error', `warning', `success'.
2290 These are used to highlight text indicating failure, caution or
2291 successful operation.
2293 ** New option `list-colors-sort' defines the color sort order
2294 for `list-colors-display'.
2296 ** The variable `focus-follows-mouse' now always defaults to nil.
2299 * Editing Changes in Emacs 24.1
2303 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2304 `isearch-yank-line'.
2306 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2307 `isearch-yank-kill'.
2309 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2311 ** New commands `count-words-region' and `count-words'.
2313 *** M-= is bound to `count-words-region', not `count-lines-region'.
2314 The `count-words-region' command, when called interactively, reports
2315 the number of lines, words, and characters in the region. It is a
2316 superset of the old `count-lines-region', which is now an obsolete
2319 ** The command `just-one-space' (M-SPC), if given a negative argument,
2320 also deletes newlines around point.
2324 *** New option `delete-active-region'.
2325 If non-nil, [delete] and DEL delete the region if it is active and no
2326 prefix argument is given. If set to `kill', those commands kill
2329 *** New command `delete-forward-char', bound to [delete].
2330 This is meant for interactive use, and obeys `delete-active-region'.
2331 The command `delete-char' does not obey `delete-active-region'.
2333 *** `delete-backward-char' is now a Lisp function.
2334 Apart from obeying `delete-active-region', its behavior is unchanged.
2335 However, the byte compiler now warns if it is called from Lisp; Lisp
2336 callers should use delete-char with a negative argument instead.
2338 *** The option `mouse-region-delete-keys' has been deleted.
2340 ** Selection changes.
2342 The default handling of clipboard and primary selections has been
2343 changed to conform with modern X applications. In short, most
2344 commands for killing and yanking text now use the clipboard, while
2345 mouse commands use the primary selection.
2347 In the following, we provide a list of these changes, followed by a
2348 list of steps to get the old behavior back if you prefer that.
2350 *** `select-active-regions' now defaults to t.
2351 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2352 the kill ring. The selected text is put in the primary selection, if
2353 the system possesses a separate primary selection facility (e.g. X).
2355 **** `select-active-regions' also accepts a new value, `only'.
2356 This means to only set the primary selection for temporarily active
2357 regions (usually made by mouse-dragging or shift-selection);
2358 "ordinary" active regions, such as those made with C-SPC followed by
2359 point motion, do not alter the primary selection.
2361 **** `mouse-drag-copy-region' now defaults to nil.
2363 *** mouse-2 is now bound to `mouse-yank-primary'.
2364 This pastes from the primary selection, ignoring the kill-ring.
2365 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2367 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2369 *** `x-select-enable-primary' now defaults to nil.
2370 Thus, commands that kill text or copy it to the kill-ring (such as
2371 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2373 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2374 exactly equivalent to M-w, C-w, and C-y respectively.
2376 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2377 non-nil by default, as Windows does not support the primary selection
2378 between applications.
2380 *** To return to the previous behavior, do the following:
2382 **** Change `select-active-regions' to nil.
2383 **** Change `mouse-drag-copy-region' to t.
2384 **** Change `x-select-enable-primary' to t (on X only).
2385 **** Change `x-select-enable-clipboard' to nil.
2386 **** Bind `mouse-yank-at-click' to mouse-2.
2388 *** Support for X cut buffers has been removed.
2390 *** X clipboard managers are now supported.
2391 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2393 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2394 in the current rectangle. With a prefix argument, this prompts for a
2395 number to count from and for a format string.
2397 ** `redisplay-dont-pause' now defaults to t.
2398 This makes Emacs feel more responsive to editing commands that arrive
2399 at high rate, e.g. if you lean on some key, because stopping redisplay
2400 in the middle (when this variable is nil) forces more expensive
2401 updates later on, and Emacs appears to be unable to keep up.
2403 ** The behavior of <TAB> for active regions in Text mode has changed.
2404 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2405 when the region is active causes Emacs to indent all the lines in the
2406 region, aligning them with the line previous to the first line in the
2407 region (or with the left margin if there is no previous line).
2409 ** When `occur' is called with a prefix argument, matching strings are
2410 collected into the `*Occur*' buffer without line numbers. If there
2411 are parenthesized subexpressions in the specified regexp, `occur'
2412 reads replacement text that may contain \\& and \\N whose convention
2413 follows `replace-match'.
2416 * Changes in Specialized Modes and Packages in Emacs 24.1
2418 ** Archive Mode has basic support for browsing and updating 7z archives.
2422 *** BibTeX mode now supports biblatex.
2423 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2424 `bibtex-entry-field-alist' is now an obsolete alias for
2425 `bibtex-BibTeX-entry-alist'.
2427 *** New command `bibtex-search-entries', bound to C-c C-a.
2429 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2431 *** New variable `bibtex-search-entry-globally'.
2435 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2437 *** The default browser used by the package is now the "xdg-open" program,
2438 on platforms that support it. This calls your desktop's preferred browser.
2442 *** Support for musical notes.
2444 *** Support for logarithmic units.
2446 *** No longer uses the tex prefix for TeX specific unit names when
2447 using TeX or LaTeX mode.
2449 *** New option to highlight selections using faces.
2451 *** `calc-histogram' has the option of using a vector to determine the bins.
2453 *** New "O" option prefix.
2455 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2457 ** Calendar, Diary, and Appt
2459 *** Diary entries can contain non-printing "comments".
2460 See the variable `diary-comment-start'.
2462 *** Appointments can specify their individual warning times.
2463 See the variable `appt-warning-time-regexp'.
2465 *** The function specified by `appt-disp-window-function' may be passed
2466 lists of arguments if multiple appointments are due at similar times.
2467 If you are using a custom function for this, you should update it.
2469 *** New function `diary-hebrew-birthday'.
2471 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2472 may no longer be nil, but must all be strings.
2474 *** The obsolete (since Emacs 22.1) method of enabling the appt
2475 package by adding `appt-make-list' to `diary-hook' has been removed.
2476 Use `appt-activate' instead.
2478 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2479 appt-issue-message (use the function appt-activate)
2480 appt-visible/appt-msg-window (use the variable appt-display-format)
2482 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2483 view-diary-entries, list-diary-entries, show-all-diary-entries
2487 *** New feature to "guess" the style in an existing buffer.
2488 The main entry point is M-x c-guess.
2490 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2492 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2493 Thus C-M-a will, by default, go to the beginning of the immediate function,
2496 *** "Macros with semicolons" can be registered for correct indentation.
2497 Where such a macro ends a line (no semicolon) the next statement is no longer
2498 parsed as a statement continuation.
2500 ** Comint and modes derived from it use the standard completion code.
2504 *** Compilation mode can be used without Font Lock mode.
2505 `compilation-parse-errors-function' is now obsolete.
2507 *** New variable `compilation-filter-start', which is bound while
2508 `compilation-filter-hook' runs. It records the start position of the
2509 text inserted by `compilation-filter'.
2511 *** `compilation-error-screen-columns' and `compilation-first-column'
2512 are obeyed in the editing buffer. So programming language modes can
2513 set them, whereas previously only the value in the *Compilation*
2518 *** Customize buffers now contain a search field.
2519 The search is performed using `customize-apropos'.
2520 To turn off the search field, set `custom-search-field' to nil.
2522 *** Options in customize group buffers start out hidden if not customized.
2523 Use the arrow to the left of the option name to toggle visibility.
2525 *** custom-buffer-sort-alphabetically now defaults to t.
2527 *** The color widget now has a "Choose" button, which allows you to
2528 choose a color via `list-colors-display'.
2532 *** It is now possible to access buses other than the default system
2535 *** The `dbus-register-method' and `dbus-register-property' functions
2536 optionally do not register names.
2538 *** The new function `dbus-register-service' registers a known service
2539 name on a D-Bus without also registering a property or a method.
2543 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2544 if called with a prefix argument, read a file name from the minibuffer
2545 instead of using the current buffer.
2547 *** The "dired local variables" feature of Dired-x is obsolete.
2548 The standard directory local variables feature replaces it.
2552 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2553 controlling attempts to autojoin a channel.
2555 *** New variable `erc-coding-system-precedence': If we use `undecided'
2556 as the server coding system, this variable will then be consulted.
2557 The default is to decode strings that can be decoded as utf-8 as
2558 utf-8, and do the normal `undecided' decoding for the rest.
2562 *** The default value of `eshell-directory-name' has changed
2563 to be an "eshell" directory in `user-emacs-directory'.
2564 The old "~/.eshell/" directory is still used if it exists, though.
2568 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2569 It now supports multithread non-stop debugging and simultaneous
2570 debugging of several threads.
2574 *** RET (`image-toggle-animation') toggles animation, if applicable.
2575 Animation plays once, unless the option `image-animate-loop' is non-nil.
2579 *** New command M-x info-display-manual displays a named Info manual.
2580 If that manual is already visited in some Info buffer, it displays
2581 that buffer. (This is handy if you have many manuals in many *info*
2582 buffers, and don't remember the name of the buffer visiting the manual
2583 you want to consult.) Otherwise, it loads and displays the manual.
2585 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2586 This is for compatibility with the stand-alone Info reader program,
2587 and also because `Info-edit' is a rarely used command that is disabled
2590 ** Mail mode changes (not Message mode)
2592 *** New command M-x mail-add-attachment for adding MIME attachments
2594 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2595 (Its name is misleading, since it has nothing to do with MIME
2596 attachments.) The old name is now an obsolete alias to the new name.
2598 ** MH-E has been updated to MH-E version 8.3.1.
2599 See MH-E-NEWS for details.
2601 ** Modula-2 mode provides auto-indentation.
2603 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2605 ** nXML mode no longer binds C-RET to `nxml-complete'.
2606 Completion is now performed via `completion-at-point', bound to C-M-i
2607 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2608 default), this performs tag completion.
2610 ** Org mode has been updated to version 7.8.09.
2611 See ORG-NEWS for details.
2613 ** Prolog mode has been completely revamped, with lots of additional
2614 functionality such as more intelligent indentation, electricity,
2615 support for more variants, including Mercury, and a lot more.
2619 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2620 in the Rmail incoming message.
2622 *** The variable `rmail-message-filter' no longer has any effect.
2623 This change was made in Emacs 23.1 but was not advertised at the time.
2624 Try using `rmail-show-message-hook' instead.
2628 *** M-x shell prompts for the shell path name if the default directory
2629 is a remote file name and neither the environment variable $ESHELL nor
2630 the variable `explicit-shell-file-name' is set.
2632 *** TAB is now bound to the standard `completion-at-point' command,
2633 which now implements the pcomplete rules for shell command completion.
2637 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2638 if the mail server supports them. This uses either built-in GnuTLS
2639 support, or the starttls.el library. Customize `smtpmail-stream-type'
2642 *** The variable `smtpmail-auth-credentials' has been removed.
2643 By default, the information is now stored in the file ~/.authinfo.
2644 This was the default value of smtpmail-auth-credentials. If you had
2645 customized smtpmail-auth-credentials to a list of user names and
2646 passwords, those settings are not used. During your first connection
2647 to the smtp server, Emacs will prompt for the user name and password,
2648 and offer to save them to ~/.authinfo. Or you can manually copy the
2649 credentials to ~/.authinfo. For example, if you had
2651 (setq smtpmail-auth-credentials
2652 '(("mail.example.org" 25 "jim" "s!cret")))
2654 then the equivalent line in ~/.authinfo would be
2656 machine mail.example.org port 25 login jim password s!cret
2658 See the auth-source manual for more information, e.g. on encrypting
2659 the credentials file.
2661 *** The variable `smtpmail-starttls-credentials' has been removed.
2662 If you had that set, you need to put
2664 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2666 in your ~/.authinfo file instead.
2668 *** SMTPmail defaults to using the address in the From: header as the
2669 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2670 to the address you wish to use instead.
2674 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2675 and `sql-oracle-scan-on'.
2677 *** New options controlling prompting for login parameters.
2678 Each supported product has a custom variable `sql-*-login-params',
2679 which is a list of the parameters to be prompted for before a
2680 connection is established.
2682 *** The command `sql-product-interactive' now takes a prefix argument,
2683 which causes it to prompt for an SQL product.
2685 *** Product-specific SQL interactive commands now take prefix arguments.
2686 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2687 given a prefix argument, prompt for a name for the SQL interactive
2688 buffer. This reduces the need for calling `sql-rename-buffer'.
2690 *** SQL interactive modes suppress command continuation prompts, and
2691 replace tabs with spaces. The first change impacts multiple line SQL
2692 statements entered with C-j between each line, statements yanked into
2693 the buffer and statements sent with `sql-send-*' functions. The
2694 second prevents the MySQL and Postgres interpreters from listing
2695 object name completions when sent text via `sql-send-*' functions.
2697 *** New command `sql-connect' starts a predefined SQLi session,
2698 using the login parameters from `sql-connection-alist'.
2700 *** New "Save Connection" menu item in SQLi buffers.
2701 This gathers the login params specified for the SQLi session, if it
2702 was not started by a connection, and saves them as a new connection.
2704 *** New commands for listing database objects and details:
2705 sql-list-all and sql-list-table.
2707 *** An API for manipulating SQL product definitions has been added.
2711 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2715 *** New inline access method "ksu" (kerberized su).
2717 *** The following access methods are discontinued: "ssh1_old",
2718 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2720 *** The user option `remote-file-name-inhibit-cache' controls whether
2721 remote file attributes are cached for better performance.
2723 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2724 default value to "".
2726 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2727 for remote machines which support SELinux.
2729 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2730 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2731 the degree of parallelism.
2733 ** VC and related modes
2735 *** Support for pulling on distributed version control systems.
2736 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2737 supported (currently with Bzr, Git, and Mercurial), to update the
2738 current branch and working tree. A prefix argument means to prompt
2739 the user for specifics, e.g. a pull location.
2741 *** `vc-update' is now an alias for `vc-pull'.
2743 *** Support for merging on distributed version control systems.
2744 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2745 is supported (currently with Bzr, Git, and Mercurial), to merge
2746 changes from another branch into the current one. It prompts for
2747 specifics, e.g. a merge source.
2749 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2750 shows a diff while querying the user. It defaults to t.
2752 *** Log entries in some Log View buffers can be toggled to display a
2753 longer description by typing RET (log-view-toggle-entry-display).
2754 This is currently supported for Bzr, Git, and Mercurial (to support
2755 another backend, define a `log-view-expanded-log-entry-function').
2756 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2757 use this to display the full log entry for the revision at point.
2759 *** New command `vc-ediff' allows visual comparison of two revisions
2760 of a file similar to `vc-diff', but using ediff backend.
2762 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2763 this was not advertised at the time.
2765 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2766 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2767 this was not advertised at the time.
2773 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2775 *** partial-completion-mode (complete.el) is obsolete.
2776 You can get a comparable behavior with:
2777 (setq completion-styles '(partial-completion initials))
2778 (setq completion-pcm-complete-word-inserts-delimiters t)
2780 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2782 *** pgg is obsolete (use EasyPG instead).
2784 *** sregex.el is obsolete, since rx.el is a strict superset.
2786 *** s-region.el and pc-select.el are obsolete.
2787 They are superseded by shift-select-mode, enabled by default since 23.1.
2789 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2793 *** The Landmark game is now invoked with `landmark', not `lm'.
2794 Its functions and variables have been similarly renamed.
2796 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2797 (This interfered with cua-mode.)
2799 *** f90.el has some support for Fortran 2008 syntax.
2801 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2803 *** New command `nato-region' converts text to NATO phonetic alphabet.
2806 * New Modes and Packages in Emacs 24.1
2808 ** Occur Edit mode applies edits made in *Occur* buffers to the
2809 original buffers. It is bound to "e" in Occur mode.
2811 ** New global minor mode electric-pair-mode.
2812 When enabled, typing an open parenthesis automatically inserts the
2813 matching closing one.
2815 ** New global minor mode electric-indent-mode.
2816 When enabled, typing certain characters triggers reindentation.
2817 Major modes wishing to use this can set electric-indent-chars or
2818 electric-indent-functions.
2820 ** New global minor mode electric-layout-mode.
2821 When enabled, typing certain characters automatically inserts newlines.
2822 Major modes wishing to use this can set electric-layout-rules.
2824 ** tabulated-list.el provides a generic major mode for tabulated data,
2825 from which other modes can be derived.
2827 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2829 ** secrets.el is an implementation of the Secret Service API, an
2830 interface to password managers like GNOME Keyring or KDE Wallet. The
2831 Secret Service API requires D-Bus for communication. The command
2832 `secrets-show-secrets' offers a buffer with a visualization of the
2835 ** notifications.el provides an implementation of the Desktop
2836 Notifications API. It requires D-Bus for communication.
2838 ** soap-client.el supports access to SOAP web services from Emacs.
2839 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2841 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
2843 ** New emacs-lock.el package.
2844 The previous version has been moved to obsolete/old-emacs-lock.el.
2845 Now, there is a proper minor mode `emacs-lock-mode'. Protection
2846 against exiting Emacs and killing the buffer can be set separately.
2847 The mechanism for automatically turning off protection for buffers
2848 with dead inferior processes has been generalized.
2851 * Incompatible Lisp Changes in Emacs 24.1
2853 ** Passing a nil argument to a minor mode function call now ENABLES
2854 the minor mode unconditionally. This is so that you can write e.g.
2856 (add-hook 'text-mode-hook 'foo-mode)
2858 to enable foo-mode in Text mode buffers, removing the need for
2859 `turn-on-foo-mode' style functions. This affects all mode commands
2860 defined by `define-minor-mode'. If called interactively, the mode
2861 command still toggles the minor mode.
2863 ** The return value of `backup-buffer' has changed.
2864 It is now a list of three elements, where the second element is a list
2865 describing the original file's SELinux context. If Emacs or the
2866 system lacks SELinux support, the context list is (nil nil nil nil).
2867 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
2869 ** `char-direction-table' and the `char-direction' function were deleted.
2870 They were buggy and inferior to the new support of bidirectional
2871 editing introduced in Emacs 24. If you need the bidirectional
2872 properties of a character, use `get-char-code-property' with the last
2873 argument `bidi-class'.
2875 ** `copy-directory' now copies the source directory as a subdirectory
2876 of the target directory, if the latter is an existing directory. The
2877 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2878 the contents directly into a pre-existing target directory.
2880 ** For mouse click input events in the text area, the Y pixel
2881 coordinate in the POSITION list now counts from the top of the text
2882 area, excluding any header line. Previously, it counted from the top
2885 ** Support for "old-style" backquotes, obsolete for 10+ years, has
2886 been further reduced. Now a backquote not followed by a space is
2887 always treated as a "new-style" backquote. Please remove all
2888 "old-style" backquotes from your code. If your code uses backquotes
2889 as documented in the Elisp manual, and compiles without warning, then
2890 you have nothing to do in this regard. Code not following the
2891 appropriate conventions may fail to compile.
2893 The most common cause of trouble seems to be an old-style backquote
2894 followed by a newline. Another cause of trouble is vector notation
2895 for key sequence notation: instead of [(control ,)] and [(control ')],
2896 you should write [(control ?,)] and [(control ?')], which will work in
2899 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2900 was not advertised at the time. The function `custom-initialize-delay'
2901 replaced all known uses.
2903 ** `view-buffer' now treats special mode-class in the same way that
2904 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2905 major mode is special).
2907 ** Menu and tool bar changes
2909 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
2910 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2911 With these alist entries omitted, `make-frame' checks the value of the
2912 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2913 a menu-bar or tool-bar, respectively. If the alist entries are added,
2914 they override the value of `menu-bar-mode'/`tool-bar-mode'.
2916 *** The menu bar bindings's caches are not used any more.
2917 Use (where-is-internal <def> nil t) instead.
2919 ** Regions created by mouse dragging are now normal active regions,
2920 similar to those created by shift-selection (see Selection changes
2921 above). In previous Emacs versions, these regions were delineated by
2922 `mouse-drag-overlay'; that variable has been removed.
2924 ** The fourth argument of `filter-buffer-substring' has been removed.
2925 If you want to remove text properties from the final result, simply
2926 pass the result through substring-no-properties.
2928 ** cl.el no longer provides `cl-19'.
2930 ** The following obsolete functions and aliases have been removed
2931 (the appropriate new function is given in parentheses; "not needed"
2932 means you can just remove all calls to the function in question):
2934 *** `comint-kill-output' (`comint-delete-output')
2935 *** `decompose-composite-char' (`char-to-string')
2936 *** `outline-visible' (`outline-invisible-p')
2937 *** `internal-find-face' (`facep')
2938 *** `internal-get-face' (`facep and check-face')
2939 *** `frame-update-faces' (not needed)
2940 *** `frame-update-face-colors' (`frame-set-background-mode')
2941 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2942 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2943 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2944 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2945 *** `x-make-font-unbold' (`make-face-unbold')
2946 *** `x-make-font-unitalic' (`make-face-unitalic')
2947 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2948 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2949 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2950 *** `char-bytes' (== 1)
2951 *** `isearch-return-char' (`isearch-printing-char')
2952 *** `make-local-hook' (not needed)
2953 *** `set-screen-height' (`set-frame-height')
2954 *** `set-screen-width' (`set-frame-width')
2956 ** The following obsolete variables and varaliases have been removed
2957 (the appropriate new variable is given in parentheses):
2959 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2960 *** `vc-header-alist' (`vc-BACKEND-header')
2961 *** `directory-sep-char' (== ?/)
2962 *** `font-lock-defaults-alist' (`font-lock-defaults')
2963 *** `e' (`float-e').
2965 ** The following obsolete files were removed:
2966 sc.el, x-menu.el, rnews.el, rnewspost.el
2968 ** The format of the finder-inf.el file has changed, since the Finder
2969 mechanism is now based on the package system. The variable
2970 `finder-package-info' is replaced by `package--builtins' and
2971 `finder-keywords-hash'.
2973 ** When generating autoloads, `update-directory-autoloads' no longer
2974 assumes every inspected file is in your `load-path'. It instead
2975 generates relative names according to the current `load-path'.
2978 * Lisp Changes in Emacs 24.1
2980 ** Code can now use lexical scoping by default instead of dynamic scoping.
2981 The `lexical-binding' variable enables lexical scoping for local
2982 variables. It is typically set via a file-local variable in the first
2983 line of the file, in which case it applies to all the code in that
2986 *** `eval' takes a new optional argument `lexical' to choose the new lexical
2987 binding instead of the old dynamic binding mode.
2989 *** Lexically scoped interpreted functions are represented with a new form
2990 of function value which looks like (closure ENV ARGS &rest BODY).
2992 *** New macro `letrec' to define recursive local functions.
2994 *** `defvar' and `defconst' now mark the variable as special (dynamic).
2995 So do `defcustom' and other forms that call `defvar' as a subroutine.
2997 *** New function `special-variable-p' to check whether a variable is
2998 declared as dynamically bound.
3000 *** The form ((lambda ...) ...) is deprecated.
3002 ** An Emacs Lisp testing tool is now included.
3003 Emacs Lisp developers can use this tool to write automated tests for
3004 their code. See the ERT info manual for details.
3006 ** Changes for bidirectional display and editing
3008 *** New function `current-bidi-paragraph-direction'.
3009 This returns the base direction of the paragraph at point.
3011 *** New function `bidi-string-mark-left-to-right'.
3012 Given a string containing characters from right-to-left scripts, this
3013 function returns another string which can be safely inserted into a
3014 buffer, such that any following text will be always displayed to the
3015 right of that string. (This works by appending an invisible Unicode
3016 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3018 This is useful when the buffer has overall left-to-right paragraph
3019 direction and you need to insert a string whose contents are not known
3020 in advance, without disrupting the layout of the line.
3024 *** Window tree functions are accessible in Elisp.
3025 Functions are provided to return the parent, siblings or child windows
3026 of any window including internal windows (windows not associated with a
3027 buffer) in the window tree.
3029 **** New function `window-valid-p' gives non-nil for live and internal
3032 **** Window manipulation can deal with internal windows.
3033 Many window handling functions like `split-window', `delete-window', or
3034 `delete-other-windows' as well as the window resizing functions can now
3035 act on any window including internal ones.
3037 *** window-total-height/-width vs window-body-height/-width.
3038 The function `window-height' has been renamed to `window-total-height'
3039 and `window-width' has been renamed to `window-body-width'. The old
3040 names are provided as aliases. Two new functions `window-total-width'
3041 and `window-body-height' are provided.
3043 *** Window parameters specific to window handling functions.
3044 For each window you can specify a parameter to override the default
3045 behavior of a number of functions like `split-window', `delete-window'
3046 and `delete-other-windows'. The variable `ignore-window-parameters'
3047 allows to ignore processing such parameters.
3049 *** New semantics of third argument of `split-window'.
3050 The third argument of `split-window' has been renamed to SIDE and can be
3051 set to any of the values 'below, 'right, 'above, or 'left to make the
3052 new window appear on the corresponding side of the window that shall be
3053 split. Any other value of SIDE will cause `split-window' to split the
3054 window into two side-by-side windows as before.
3056 *** Window resizing functions.
3057 A new standard function for resizing windows called `window-resize' has
3058 been introduced. This and all other functions for resizing windows no
3059 longer delete any windows when they become too small.
3061 *** Deleting the selected window now selects the most recently selected
3062 live window on that frame instead.
3064 *** `adjust-window-trailing-edge' adjustments.
3065 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3066 is able to resize other windows if a window adjacent to the trailing
3067 edge cannot be shrunk any more. This makes its behavior more similar to
3068 that of Emacs 21 without compromising, however, its inability to delete
3069 windows which was introduced in Emacs 22.
3071 *** Window-local buffer lists.
3072 Windows now have local buffer lists. This means that removing a buffer
3073 from display in a window will preferably show the buffer previously
3074 shown in that window with its previous window-start and window-point
3075 positions. This also means that the same buffer may be automatically
3076 shown twice even if it already appears in another window.
3078 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3079 which if non-nil requires the buffer to be displayed in the currently
3080 selected window, signaling an error otherwise. If nil, another window
3081 can be used, e.g. if the selected one is strongly dedicated.
3083 *** `split-window-vertically' and `split-window-horizontally' renamed
3084 to `split-window-below' and `split-window-right' respectively.
3085 The old names are kept as aliases.
3089 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3090 named ACTION, and takes a display action of the same form as
3091 `display-buffer-base-action' (see Changes, above). A non-nil,
3092 non-list value is treated specially, as the old meaning.
3094 **** New variable `display-buffer-overriding-action'.
3096 **** The procedure of `display-buffer' etc. to choose a window is
3097 determined by combining `display-buffer-overriding-action',
3098 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3099 and `display-buffer-fallback-action'. The second and fourth of these
3100 are user-customizable variables.
3102 See the docstring of `display-buffer' for details.
3104 *** New functions `window-state-get' and `window-state-put'.
3105 These functions allow to save and restore the state of an arbitrary
3106 frame or window as an Elisp object.
3110 *** New variable `completion-extra-properties' used to specify extra
3111 properties of the current completion:
3112 - :annotate-function, same as the old completion-annotate-function.
3113 - :exit-function, function to call after completion took place.
3115 *** Functions on `completion-at-point-functions' can return any of the
3116 properties valid for `completion-extra-properties'.
3118 *** `completion-annotate-function' is obsolete.
3120 *** New `metadata' method for completion tables. The metadata thus returned
3121 can specify various details of the data returned by `all-completions':
3122 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3123 used to select a style in completion-category-overrides.
3124 - `annotation-function' to add annotations in *Completions*.
3125 - `display-sort-function' to specify how to sort entries in *Completions*.
3126 - `cycle-sort-function' to specify how to sort entries when cycling.
3128 *** `minibuffer-local-filename-must-match-map' is not used any more.
3129 Instead, the bindings in `minibuffer-local-filename-completion-map'
3130 are combined with `minibuffer-local-must-match-map'.
3132 *** New variable `completing-read-function' allows overriding the
3133 behavior of `completing-read'.
3135 ** `glyphless-char-display' can now distinguish between graphical and
3136 text terminal display, via a char-table entry that is a cons cell.
3138 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3139 Instead, the offending function is removed.
3143 *** New function `run-hook-wrapped' for running an abnormal hook by
3144 passing the hook functions as arguments to a "wrapping" function.
3145 Like `run-hook-with-args-until-success', it stops at the first
3146 non-nil return value.
3148 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3149 set of "wrapping" filters, similar to around advice.
3150 (A version of this macro was actually added in Emacs 23.2 but was not
3151 advertised at the time.)
3155 *** New macro `condition-case-unless-debug' (this was actually added in
3156 Emacs 23.1 as condition-case-no-debug, but not advertised)
3158 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3160 *** Variable `stack-trace-on-error' removed.
3162 *** The debugger can now "continue" from an error, which means it will
3163 jump to the error handler as if the debugger had not been invoked
3164 instead of jumping all the way to the top-level.
3166 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3167 This can be useful when `inhibit-quit' is set.
3169 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3170 named Emacs server instances.
3172 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3173 to redirect STDOUT to a file.
3175 ** The function `format-time-string' now supports the %N directive,
3176 for higher-resolution time stamps.
3178 ** New input reading functions
3180 *** New function `read-char-choice' reads a restricted set of
3181 characters, discarding any inputs not inside the set.
3183 *** The command `read-color' now requires a match for a color name
3184 or RGB triplet, instead of signaling an error if the user provides
3187 **** `facemenu-read-color' is now an alias for `read-color'.
3189 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3190 The variable is now used to load all kind of supported dynamic libraries,
3191 not just image libraries. The previous name is still available as an
3194 ** Syntax parsing changes
3196 *** New variable `syntax-propertize-function'.
3197 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3198 This allows syntax-table properties to be set independently from font-lock:
3199 just call syntax-propertize to make sure the text is propertized.
3200 Together with this new variable come a new hook
3201 syntax-propertize-extend-region-functions, as well as two helper functions:
3202 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3203 as-is; and syntax-propertize-rules which provides a new way to specify
3206 *** Syntax tables support a new "comment style c" additionally to style b.
3208 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3210 ** frame-local variables cannot be let-bound any more.
3212 ** Major and minor mode changes
3214 *** `set-auto-mode' now respects mode: local variables at the end of files,
3215 as well as those in the -*- line.
3217 *** `prog-mode' is a new major mode from which programming modes
3220 **** `prog-mode-hook' can be used to enable features for programming
3221 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3222 on-the-fly spell checking for comments and strings.
3224 **** New minor modes `prettify-symbols-mode' and
3225 `global-prettify-symbols-mode' let the user enable symbol
3226 prettification (replacing a string like "lambda" with the Greek lambda
3229 *** New hook `change-major-mode-after-body-hook', run by
3230 `run-mode-hooks' just before any other mode hooks.
3232 *** Enabled globalized minor modes can be disabled in specific major modes.
3233 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3234 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3236 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3238 ** File-handling changes
3240 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3241 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3242 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3243 argument is supplied (see Trash changes, above).
3245 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3247 ** Tool-bars can display separators.
3248 Tool-bar separators are handled like menu separators in menu-bar maps,
3249 i.e. via menu entries of the form `(menu-item "--")'.
3253 *** Animated images support (currently animated gifs only).
3255 **** `image-animated-p' returns non-nil if an image can be animated.
3257 **** `image-animate' animates a supplied image spec.
3259 **** `image-animate-timer' returns the timer object for an image that
3262 *** `image-extension-data' has been renamed to `image-metadata'.
3263 The old name is an obsolete alias to the new one.
3265 *** Image mode can view any image type that ImageMagick supports.
3266 This requires Emacs to be built with ImageMagick support.
3268 **** New function `imagemagick-types', defined if ImageMagick support
3269 is enabled, returns a list of image file extensions that your
3270 ImageMagick installation supports.
3272 **** New function `imagemagick-register-types' enables ImageMagick
3273 image types in Image mode and in `create-image' and other helper
3276 **** New option `imagemagick-types-inhibit' excludes certain
3277 ImageMagick image types from `imagemagick-register-types'.
3279 **** With ImageMagick support, there are extra Image mode commands to
3280 resize and rotate images: `image-transform-fit-to-height',
3281 `image-transform-fit-to-width', `image-transform-set-rotation', and
3282 `image-transform-set-scale'.
3284 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3285 passes it to the mail user agent function. This argument specifies an
3286 action for returning to the caller after finishing with the mail. For
3287 example, this is used by Rmail to optionally delete a mail window.
3289 ** XML and HTML parsing
3290 If Emacs is compiled with libxml2 support, there are two new
3291 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3292 and `libxml-parse-xml-region' (which parses XML). Both return an
3293 Emacs Lisp parse tree.
3295 ** Networking and encryption changes
3297 *** `open-network-stream' can now be used to open an encrypted stream.
3298 It now accepts an optional `:type' parameter for initiating a TLS
3299 connection, directly or via STARTTLS. To do STARTTLS, additional
3300 parameters (`:end-of-command', `:success', `:capabilities-command')
3301 must also be supplied.
3303 *** New library gnutls.el.
3304 The new function `gnutls-available-p' returns non-nil if Emacs is
3305 built with GnuTLS support. The main entry points are
3306 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3307 these functions through `open-network-stream', because that can
3308 upgrade connections through STARTTLS opportunistically or use plain
3309 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3312 *** New primitive `secure-hash' that supports many secure hash algorithms:
3313 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3314 sha1.el has been removed. The `sha1' feature is provided by default.
3318 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3320 ** Progress reporters can now "spin".
3321 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3322 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3323 time you call `progress-reporter-update' on that progress reporter,
3324 with a nil or omitted VALUE argument, the reporter message is
3325 displayed with a "spinning bar".
3327 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3328 being reverted, even if the buffer has a local `revert-buffer-function'.
3330 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3331 If delayed-warnings-list is non-nil, the command loop calls
3332 `delayed-warnings-hook' after `post-command-hook'. At present, this
3333 is only used by Emacs on some platforms to display warnings during
3334 startup, which might otherwise not be noticed. This uses the
3335 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3337 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3339 ** New function `make-composed-keymap' that constructs a new keymap
3340 from multiple input maps. You can use this to make a keymap that
3341 inherits from multiple maps, eg:
3342 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3344 ** New function `string-prefix-p'.
3345 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3347 ** New reader macro ## that stands for the empty symbol.
3348 This means that the empty symbol can now be read back. Also, #: by itself
3349 (when not immediately followed by a possible symbol character) stands for
3350 an empty uninterned symbol.
3352 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3354 ** The following functions and variables are obsolete:
3356 *** `tooltip-use-echo-area' is obsolete.
3357 Rather than setting this to t, disable Tooltip mode instead.
3359 *** buffer-substring-filters is obsolete.
3360 Use `filter-buffer-substring-functions' instead.
3362 *** `byte-compile-disable-print-circle' is obsolete.
3364 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3365 Use `post-command-hook' instead.
3367 *** `font-lock-maximum-size' is obsolete.
3370 * Changes in Emacs 24.1 on Non-Free Operating Systems
3372 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3373 and also when HOME is set to C:\ by default.
3375 ** New configure.bat options
3377 *** --enable-checking builds Emacs with extra runtime checks.
3379 *** --distfiles specifies files to be included in binary distribution.
3381 *** --without-gnutls disables automatic GnuTLS detection.
3383 *** --lib for general library linkage, works with the USER_LIBS build variable.
3385 ** New make target `dist' to create binary distribution for MS Windows.
3387 ** The Lisp function `w32-default-color-map' is now obsolete.
3388 (It is only used internally in the Emacs C code.)
3390 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3391 reappear on mouse-over. (Requires OS X 10.6 or later.)
3393 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3394 other platforms, rather than inserting its contents into the buffer.
3397 ----------------------------------------------------------------------
3398 This file is part of GNU Emacs.
3400 GNU Emacs is free software: you can redistribute it and/or modify
3401 it under the terms of the GNU General Public License as published by
3402 the Free Software Foundation, either version 3 of the License, or
3403 (at your option) any later version.
3405 GNU Emacs is distributed in the hope that it will be useful,
3406 but WITHOUT ANY WARRANTY; without even the implied warranty of
3407 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3408 GNU General Public License for more details.
3410 You should have received a copy of the GNU General Public License
3411 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3416 paragraph-separate: "[
\f]*$"