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 ** Command `rectangle-mark-mode' bound to C-x SPC 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 customization 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.
411 ** New features for Octave mode:
412 *** Font locking for texinfo comments and new keywords
413 *** Completion in Octave file buffers
415 *** Jump to definition
416 *** Documentation lookup/search
417 *** Code cleanup and various bug fixes
420 *** Ido has a manual now.
421 *** `ido-use-virtual-buffers' takes a new value 'auto.
422 *** `ido-decorations' has been slightly extended to give a bit more control.
426 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
427 visit the next image file and the previous image file in the same
428 directory, respectively.
430 *** New commands to show specific frames of multi-frame images.
431 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
432 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
434 *** New commands to speed up, slow down, or reverse animation.
437 *** The command `image-mode-fit-frame' deletes other windows.
438 When toggling, it restores the frame's previous window configuration.
439 It also has an optional frame argument, which can be used by Lisp
440 callers to fit the image to a frame other than the selected frame.
444 *** New face `info-index-match' is used to highlight matches in index
445 entries displayed by `Info-index-next', `Info-virtual-index' and
450 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
451 will cycle through faces in `hi-lock-face-defaults' without prompting.
454 *** New global command `M-s h .' (`highlight-symbol-at-point')
455 highlights the symbol found near point without prompting,
456 using the next face automatically.
458 ** Search and Replace
460 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
461 starts a symbol (identifier) incremental search forward with the
462 symbol found near point added to the search string initially.
464 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
465 and adds it to the search string.
467 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
468 between nil and the value of the option `search-invisible' (or `open'
471 *** `query-replace' skips invisible text when `search-invisible' is nil,
472 and opens overlays with hidden text when `search-invisible' is `open'.
475 *** By default, prefix arguments do not now terminate Isearch mode.
476 Set `isearch-allow-prefix' to nil to restore old behavior.
478 *** More Isearch commands accept prefix arguments, namely
479 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
482 *** Word search now matches whitespace at the beginning/end
483 of the search string if it contains leading/trailing whitespace.
484 In an incremental word search or when using a non-nil LAX argument
485 of `word-search-regexp', the lax matching can also match part of
486 the first word (in addition to the lax matching of the last word).
487 The same rules are now applied to the symbol search with the difference
488 that it matches symbols, and non-symbol characters between symbols.
490 ** MH-E has been updated to MH-E version 8.5.
491 See MH-E-NEWS for details.
494 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
495 Customize `unrmail-mbox-format' to change this.
498 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
499 of how Rmail displays non-MIME messages.
502 ** New function `ses-rename-cell' to give SES cells arbitrary names.
504 ** trace-function was largely rewritten.
505 New features include:
506 - no prompting for the destination buffer, unless a prefix-arg was used.
507 - additionally to prompting for a destination buffer, when a prefix-arg is
508 used, the user can enter a "context", i.e. Lisp expression whose value at the
509 time the function is entered/exited will be printed along with the function
510 name and arguments. Useful to trace the value of (current-buffer) or
511 (point) when the function is invoked.
513 ** New command `delete-duplicate-lines' has new types of operation:
514 When its arg ADJACENT is non-nil (when called interactively with C-u C-u)
515 it works like the utility `uniq'. Otherwise by default it deletes
516 duplicate lines everywhere in the region without regard to adjacency.
517 When its arg KEEP-BLANKS is non-nil (when called interactively with
518 C-u C-u C-u), duplicate blank lines are preserved.
520 ** New `cycle-spacing' command allows cycling between having just one
521 space, no spaces, or reverting to the original spacing. Like
522 `just-one-space' command it can handle or ignore newlines and
523 leave different number of spaces.
525 ** Todo mode has been rewritten and enhanced.
526 New features include:
527 - support for multiple todo files and archive files of done items;
528 - renaming, reordering, moving, merging, and deleting categories;
529 - sortable tabular summaries of categories and the types of items they contain;
530 - cross-category lists of items filtered by specific criteria;
531 - more fine-grained interaction with the Emacs diary, by being able to decide
532 for each todo item whether it appears in the Fancy Diary display;
533 - highly flexible new item insertion and item editing;
534 - moving items between categories, storing done items in their category or in
535 archive files, undoing or unarchiving done items;
536 - reprioritizing items by inputting a numerical priority;
537 - extensive customizability of operation and display, including numerous faces.
538 The Todo mode user manual describes all commands and most user options.
539 To support some of these features, a new file format is used, which is
540 incompatible with the old format; however, you can convert old todo and done
541 item files to the new format on initializing the first new todo file, or at any
542 later time with the provided conversion command. The old version of
543 todo-mode.el has been made obsolete and renamed otodo-mode.el.
547 *** The experimental url syntax for remote file names is withdrawn.
550 *** New connection method "adb", which allows to access Android
551 devices by the Android Debug Bridge. The variable `tramp-adb-program'
552 can be used to adapt the path of the "adb" program, if needed.
554 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
555 "scpc" and "rsyncc" are discontinued. The ssh option
556 "ControlMaster=auto" is set automatically in all ssh-based methods,
560 *** Handlers for `file-acl' and `set-file-acl' for remote machines
561 which support POSIX ACLs.
564 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
565 for remote machines which support filesystem notifications.
569 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
571 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
575 *** The commands `woman-default-faces' and `woman-monochrome-faces'
576 are obsolete. Customize the `woman-*' faces instead.
580 *** Added Eshell-Tramp module
581 External su and sudo commands are now the default; the internal,
582 Tramp-using variants can still be used by enabling the eshell-tramp
587 *** The format of `archive-contents' files, generated by package
588 repositories, has changed to allow a new (fifth) element in the data
589 vectors, containing an associative list with extra properties.
591 *** `describe-package' buffer uses the `:url' extra property to
592 display a `Homepage' header, if it's present.
594 ** New term.el option `term-suppress-hard-newline'.
596 ** Obsolete packages:
598 *** Iswitchb is made obsolete by icomplete-mode.
600 *** longlines.el is obsolete; use visual-line-mode instead.
605 *** terminal.el is obsolete; use term.el instead.
607 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
612 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
615 *** The Info-edit command is obsolete. Editing Info nodes by hand
616 has not been relevant for some time.
620 *** `explicit-bash-args' now always defaults to use --noediting.
621 During initialization, Emacs no longer expends a process to decide
622 whether it is safe to use Bash's --noediting option. These days
623 --noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
626 ** There is a new macro `skip-unless' for skipping ERT tests. See the manual.
629 * New Modes and Packages in Emacs 24.4
631 ** New `superword-mode' in subword.el
632 `superword-mode' overrides the default word motion commands to treat
633 symbol_words as a single word, similar to what `subword-mode' does and
634 using the same internal functions.
636 ** New nadvice.el package offering lighter-weight advice facilities.
638 - add-function/remove-function which can be used to add/remove code on any
639 function-carrying place, such as process-filters or `<foo>-function' hooks.
640 - advice-add/advice-remove to add/remove a piece of advice on a named function,
641 much like `defadvice' does.
643 ** New frameset.el package.
644 It provides a set of operations to save a frameset (the state of all
645 or a subset of the existing frames and windows, somewhat similar to a
646 frame configuration), both in-session and persistently, and restore it
647 at some point in the future.
650 ** The package filenotify.el provides an interface for file system
651 notifications. It requires, that Emacs is compiled with one of the
652 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
655 * Incompatible Lisp Changes in Emacs 24.4
657 ** `kill-region' lost its `yank-handler' optional argument.
659 ** `(input-pending-p)' no longer runs other timers which are ready to
660 run. The new optional CHECK-TIMERS param allows for the prior behavior.
662 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
664 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
665 Some languages match those as »...« and others as «...» so better stay neutral.
667 ** The default file coding for Emacs Lisp files is now utf-8.
668 (See file-coding-system-alist.) In most cases, this change is transparent, but
669 files that contain unusual characters without specifying an explicit coding
670 system may fail to load with obscure errors.
671 You should either convert them to utf-8 or add an explicit `coding:' cookie.
673 ** overriding-terminal-local-map does not replace the local keymaps any more.
674 It used to disable the minor mode, major mode, and text-property keymaps,
675 whereas now it simply has higher precedence.
677 ** Default process filters and sentinels are not nil any more.
678 Instead they default to a function which does what the nil value used to do.
680 ** `read-event' does not return decoded chars in ttys any more.
681 Just as was the case in Emacs-22 and before, decoding of tty input according to
682 keyboard-coding-system is not performed in read-event any more. But contrary
683 to that past, it is still done before input-decode-map/function-key-map/...
685 ** Removed inhibit-local-menu-bar-menus.
687 ** frame-local variables that affect redisplay do not work any more.
688 More specifically, the redisplay does not bother to check for a frame-local
689 value when looking up variables.
691 ** nil and "unbound" are indistinguishable in symbol-function.
692 `symbol-function' never signals `void-function' any more.
693 `fboundp' returns non-nil if the symbol was `fset' to nil.
695 ** `defadvice' does not honor the `freeze' flag and cannot advise
696 special-forms any more.
698 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
699 VAR was bound to nil which was not tremendously useful and just lead to
700 spurious warnings about an unused var.
702 ** The return value of `backup-buffer' has changed.
703 The second argument is no longer an SELinux context, instead it is an
704 alist of extended attributes as returned by the new function
705 `file-extended-attributes'. The attributes can be applied to another
706 file using `set-file-extended-attributes'.
708 ** `visited-file-modtime' now returns -1 for nonexistent files.
709 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
710 in the presence of files with negative time stamps.
712 ** The cars of the elements in `interpreter-mode-alist' are now treated
713 as regexps rather than literal strings. Technically this is an
714 incompatible change, but unless you are using interpreter-mode-alist
715 for something (not just adding elements to it), it ought not to affect you.
718 * Lisp Changes in Emacs 24.4
720 ** New hook `pre-redisplay-function'.
723 ** Functions that pop up menus and dialogs now work on all terminal types,
725 This includes `x-popup-menu', `x-popup-dialog', `message-box',
728 The function `display-popup-menus-p' will now return non-nil for a
729 display or frame whenever a mouse is supported on that display or
732 ** New bool-vector set operation functions:
733 *** `bool-vector-exclusive-or'
734 *** `bool-vector-union'
735 *** `bool-vector-intersection'
736 *** `bool-vector-set-difference'
737 *** `bool-vector-not'
738 *** `bool-vector-subsetp'
739 *** `bool-vector-count-matches'
740 *** `bool-vector-count-matches-at'
742 ** Comparison functions =, <, >, <=, >= now take many arguments.
744 ** The second argument of `eval' can now be a lexical-environment.
746 ** `with-demoted-errors' takes an additional argument `format'.
748 ** New function `define-error'.
750 ** New hook `tty-setup-hook'.
753 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
755 ** New library helpers.el for misc helper functions
756 *** `hash-table-keys'
757 *** `hash-table-values'
759 ** Obsoleted functions:
762 *** `lisp-complete-symbol'
764 *** `minibuffer-completion-contents'
765 *** `isearch-nonincremental-exit-minibuffer'
766 *** `isearch-filter-visible'
767 *** `generic-make-keywords-list'
769 ** `with-wrapper-hook' is obsoleted by `add-function'.
770 The few hooks that used with-wrapper-hook are replaced as follows:
771 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
772 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
773 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
775 ** `split-string' now takes an optional argument TRIM.
776 The value, if non-nil, is a regexp that specifies what to trim from
777 the start and end of each substring.
779 ** `get-upcase-table' is obsoleted by the new `case-table-get-table'.
781 ** Support for filesystem notifications.
782 Emacs now supports notifications of filesystem changes, such as
783 creation, modification, and deletion of files. This requires the
784 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
785 MS-Windows systems, this is supported for Windows XP and newer
788 ** Changes in autorevert.el
791 *** If Emacs is compiled with file notification support, notifications
792 are used instead of checking the time stamp of the files. You can
793 disable this by setting the user option `auto-revert-use-notify' to
794 nil. Alternatively, a regular expression of directories to be
795 excluded from file notifications can be specified by
796 `auto-revert-notify-exclude-dir-regexp'.
799 *** The new user option `auto-revert-remote-files' enables reversion
800 of remote files when set to non-nil.
804 *** The function `face-spec-set' is now analogous to `setq' for face specs.
805 Its third arg now accepts values specifying exactly which face spec to
806 set (defface, custom, or user spec), and it directly sets the relevant
807 property using the supplied face spec.
809 *** Face specs set via Custom themes now replace the `defface' spec
810 rather than inheriting from it (as do face specs set via Customize).
812 *** New face characteristic (supports :underline (:style wave))
813 specifies whether or not the terminal can display a wavy line.
815 *** New face spec attribute :distant-foreground
816 specifies foreground to use if background color is near the foreground
817 color that would otherwise have been used.
822 *** `image-animated-p' is now `image-multi-frame-p'.
823 It returns non-nil for any image that contains multiple frames,
824 whether or not it specifies a frame delay.
827 *** When animating images that do not specify a frame delay,
828 Emacs uses `image-default-frame-delay'.
831 *** New functions `image-current-frame' and `image-show-frame' for getting
832 and setting the current frame of a multi-frame image.
834 *** You can change the speed of animated images.
836 ** Changes in encoding and decoding of text
839 *** New coding-system `prefer-utf-8'.
840 This is like `undecided' but prefers UTF-8 on decoding if the text to
841 be decoded does not contain any invalid UTF-8 sequences. On encoding,
842 any non-ASCII characters are automatically encoded as UTF-8.
845 *** New attributes of coding-systems whose type is `undecided'.
846 Two new attributes, `:inhibit-null-byte-detection' and
847 `:inhibit-iso-escape-detection', determine how to detect encoding of
848 text that includes null bytes and ISO-2022 escape sequences,
849 respectively. Each of these attributes can be either nil, zero, or
850 t. If it is t, decoding text ignores null bytes and, respectively,
851 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
852 with no-conversion and ISO-2022 sequences cause Emacs to assume the
853 text is encoded in one of the ISO-2022 encodings, such as
854 iso-2022-7bit. If the value is zero, Emacs consults the variables
855 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
857 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
858 UTF-8 encoding and decoding, whenever possible.
860 These attributes are only meaningful for coding-systems of type
861 `undecided'. (The type of a coding-system is determined by its
862 `:coding-type' attribute and can be accessed by calling the
863 `coding-system-type' function.)
865 ** The function `set-visited-file-modtime' now accepts a 0 or -1 argument
866 with the same interpretation as the returned value of `visited-file-modtime'.
868 ** time-to-seconds is not obsolete any more.
869 ** New functions special-form-p and macrop.
870 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
871 text-property on the first char.
873 ** The `defalias-fset-function' property lets you catch calls to defalias
874 and redirect them to your own function instead of `fset'.
876 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
877 When you edit DIR/FILE, Emacs normally creates a symbolic link
878 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
879 is being edited. Formerly, if there was already a non-symlink file
880 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
881 through DIR/.#FILE.9. These fallbacks have been removed, so that
882 Emacs now no longer locks DIR/FILE in that case.
884 On file systems that do not support symbolic links, the lock is now a
885 regular file with contents being what would have been in the symlink.
887 ** The 9th element returned by `file-attributes' is now unspecified.
888 Formerly, it was t if the file's gid would change if file were deleted
889 and recreated. This value has been inaccurate for years on many
890 platforms, and nobody seems to have noticed or cared.
892 ** The function `file-ownership-preserved-p' now has an optional
893 argument GROUP which causes it check for file group too. This can be
894 used in place of the 9th element of `file-attributes'.
896 ** New functions `group-gid' and `group-real-gid'.
898 ** The 6th argument to `copy-file' has been renamed to
899 `preserve-extended-attributes' as it now handles both SELinux context
902 ** The `common-substring' argument of display-completion-list is obsolete.
903 Either use `completion-all-completions' which already returns highlighted
904 strings (including for partial or substring completion) or call
905 `completion-hilit-commonality' to add the highlight.
907 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
909 *** The package descriptor and name of global variables, constants,
910 and functions should be separated by two hyphens if the symbol is not
911 meant to be used by other packages.
914 * Changes in Emacs 24.4 on Non-Free Operating Systems
916 ** The procedure for building Emacs on MS-Windows has changed.
917 It is now built by running the same configure script as on all other
918 platforms. This requires the MSYS environment and MinGW development
919 tools. See the updated instructions in nt/INSTALL for details.
921 Using the Posix configure script and Makefile's also means a change in
922 the directory structure of the Emacs installation on Windows. It is
923 now the same as on GNU and Unix systems. In particular, the auxiliary
924 programs, such as cmdproxy.exe and hexl.exe, are in
925 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
926 version), version-independent site-lisp is in share/emacs/site-lisp,
927 version-specific Lisp files are in share/emacs/VERSION/lisp and in
928 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
929 files are in share/emacs/VERSION/etc. (Emacs knows about all these
930 directories and will find the files in there automatically; there's no
931 need to set any variables due to this change.)
934 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
935 The backtrace is written to the 'emacs_backtrace.txt' file in the
936 directory where Emacs was running.
939 ** The variable `buffer-file-type' is no longer supported.
940 Setting it has no effect, and %t in the mode-line format is ignored.
941 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
942 modifying it has no effect.
945 ** Lock files now work on MS-Windows.
946 This allows to avoid losing your edits if the same file is being
947 edited in another Emacs session or by another user. See the node
948 "Interlocking" in the Emacs User Manual for the details. To disable
949 file locking, customize `create-lockfiles' to nil.
951 ** Improved fullscreen support on Mac OS X.
952 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
953 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
954 native is the default.
957 * Installation Changes in Emacs 24.3
959 ** The default X toolkit is now Gtk+ version 3.
960 If you don't pass `--with-x-toolkit' to configure, or if you use
961 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
962 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
963 You can explicitly require a specific version by passing
964 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
966 ** New configure option `--enable-link-time-optimization', to utilize
967 an appropriate feature provided by GCC since version 4.5.0.
969 ** New configure option `--without-all' to disable most of the optional
970 features (image support, etc.) that are normally enabled by default.
972 ** New configure option `--enable-gcc-warnings' (for developing/debugging
973 Emacs). If building with GCC, this enables compile-time checks that
974 warn/give errors about possibly-questionable C code. On a recent GNU
975 system there should be no warnings; on older and on non-GNU systems
976 the results may be useful to developers.
978 ** The configure option `--enable-use-lisp-union-type' has been
979 renamed to `--enable-check-lisp-object-type', as the resulting
980 Lisp_Object type no longer uses a union to implement the compile time
981 check that this option enables.
983 ** The configure option `--disable-maintainer-mode' has been removed,
984 as it was confusingly-named and rarely useful.
986 ** The configure options `--program-prefix', `--program-suffix', and
987 `--program-transform-name' apply to more than just the installed
988 binaries. Now they also affect the man pages, icons, and the
989 etc/emacs.desktop file; but not the info pages, since this would break
990 links between the various manuals.
992 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
993 overwriting "emacs" in the installation bin/ directory with a link
996 ** Emacs uses libtinfo in preference to libncurses, if available.
998 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
999 /usr/pkg/lib to the linker search path. You must add them yourself if
1002 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1003 (from the bin and libexec directories, respectively). The former is
1004 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1007 * Startup Changes in Emacs 24.3
1009 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1010 lisp/ directory. There should not be any there anyway. If you have
1011 been adding them there, put them somewhere else; e.g., site-lisp.
1013 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1016 * Changes in Emacs 24.3
1020 *** `C-h f' (`describe-function') can now perform autoloading.
1021 When this command is called for an autoloaded function whose docstring
1022 contains a key substitution construct, that function's library is
1023 automatically loaded, so that the documentation can be shown
1024 correctly. To disable this, set `help-enable-auto-load' to nil.
1026 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1027 even after their associated libraries have been loaded (and the
1028 autoloads have been redefined as functions).
1032 *** Images displayed via ImageMagick now support transparency and the
1033 :background image specification property.
1035 *** When available, ImageMagick support is automatically enabled.
1036 It is no longer necessary to call `imagemagick-register-types'
1037 explicitly to install ImageMagick image types; that function is called
1038 automatically at startup, or when customizing an imagemagick- option.
1040 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1041 ImageMagick to view images. (You must call `imagemagick-register-types'
1042 afterwards if you do not use customize to change this.)
1044 *** The new variable `imagemagick-enabled-types' also affects which
1045 ImageMagick types are treated as images. The function
1046 `imagemagick-filter-types' returns the list of types that will be
1049 *** ImageMagick images now support the :max-width and :max-height
1052 *** Some data types aren't auto-detected by ImageMagick. Adding
1053 :format to `create-image' may help if the content type is in the
1054 new variable `image-format-suffixes'.
1058 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1059 next and previous path separator, respectively.
1061 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1062 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1063 non-nil before enabling the mode.
1067 *** New option `mode-line-default-help-echo' specifies the help text
1068 (shown in a tooltip or in the echo area) for any part of the mode line
1069 that does not have its own specialized help text.
1071 *** You can now click mouse-3 in the coding system indicator to invoke
1072 `set-buffer-file-coding-system'.
1074 ** Server and client
1076 *** emacsclient now obeys string values for `initial-buffer-choice',
1077 if it is told to open a new frame without specifying any file to visit
1078 or expression to evaluate.
1080 *** New option `server-auth-key' specifies a shared server key.
1082 ** Emacs now generates backtraces on fatal errors.
1083 On encountering a fatal error, Emacs now outputs a textual description
1084 of the fatal signal, and a short backtrace on platforms like glibc
1085 that support backtraces.
1087 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1088 This minor mode replaces `toggle-read-only', which is now obsolete.
1090 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1091 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1092 respectively, without exiting from the prompt.
1094 ** In the Package Menu, newly-available packages are listed as "new",
1095 and sorted above the other "available" packages by default.
1097 ** If your Emacs was built from a bzr checkout, the new variable
1098 `emacs-bzr-version' contains information about the bzr revision used.
1100 ** New option `create-lockfiles' specifies usage of lockfiles.
1101 It defaults to t. Changing it to nil inhibits the creation of lock
1102 files (use this with caution).
1104 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1105 variables on remote hosts.
1107 ** The entry for PCL-CVS has been removed from the Tools menu.
1108 The PCL-CVS commands are still available via the keyboard.
1110 ** Using "unibyte: t" in Lisp source files is obsolete.
1111 Use "coding: raw-text" instead.
1113 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1114 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1115 The previous binding, introduced in Emacs 24.1, was a mistake, because
1116 `C-c LETTER' bindings are reserved for user customizations.
1118 ** Internationalization
1120 *** New language environment: Persian.
1122 *** New input method `vietnamese-vni'.
1124 ** Nextstep (GNUstep / Mac OS X) port
1126 *** Support for fullscreen and the frame parameter fullscreen.
1128 *** A file dialog is used for open/save operations initiated from the
1132 * Editing Changes in Emacs 24.3
1134 ** Search and Replace
1136 *** Non-regexp Isearch now performs "lax" space matching.
1137 Each sequence of spaces in the supplied search string may match any
1138 sequence of one or more whitespace characters, as specified by the
1139 variable `search-whitespace-regexp'. (This variable is also used by a
1140 similar existing feature for regexp Isearch.)
1142 *** New Isearch command `M-s SPC' toggles lax space matching.
1143 This applies to both ordinary and regexp Isearch.
1145 *** New option `replace-lax-whitespace'.
1146 If non-nil, `query-replace' uses flexible whitespace matching too.
1149 *** Global `M-s _' starts a symbol (identifier) incremental search,
1150 and `M-s _' in Isearch toggles symbol search mode.
1151 `M-s c' in Isearch toggles search case-sensitivity.
1153 ** Navigation commands
1155 *** New binding `M-g c' for `goto-char'.
1157 *** New binding `M-g TAB' for `move-to-column'.
1159 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1160 interactively with no prefix arg. Previously, it moved to column 1.
1162 ** New option `yank-handled-properties' allows processing of text
1163 properties on yanked text, in ways that are more general than just
1164 removing them (as is done by `yank-excluded-properties').
1166 ** New option `delete-trailing-lines' specifies whether
1167 M-x delete-trailing-whitespace should delete trailing lines at the end
1168 of the buffer. It defaults to t.
1170 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1172 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1173 `ucs-insert' is now an obsolete alias for `insert-char'.
1175 ** The `z' key no longer has a binding in most special modes.
1176 It used to be bound to `kill-this-buffer', but `z' is too easy to
1179 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1180 It copies the region-rectangle as the last rectangle kill.
1184 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1186 *** New option `register-separator' specifies the register containing
1187 the text to put between collected texts for use with
1188 M-x append-to-register and M-x prepend-to-register.
1191 * Changes in Specialized Modes and Packages in Emacs 24.3
1193 ** Common Lisp emulation (CL)
1195 *** CL's main entry is now (require 'cl-lib).
1196 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1197 i.e., all its definitions have the "cl-" prefix (and internal definitions
1198 use the "cl--" prefix).
1200 If `cl' provided a feature under the name `foo', then `cl-lib'
1201 provides it under the name `cl-foo' instead; with the exceptions of the
1202 few `cl' definitions that had to use `foo*' to avoid conflicts with
1203 pre-existing Elisp entities. These have been renamed to `cl-foo'
1204 rather than `cl-foo*'.
1206 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1207 provide the old, non-prefixed names. Some exceptions are listed below:
1209 *** `cl-flet' is not like `flet' (which is deprecated).
1210 Instead it obeys the behavior of Common-Lisp's `flet'.
1211 In particular, in cl-flet function definitions are lexically scoped,
1212 whereas in flet the scoping is dynamic.
1214 *** `cl-labels' is slightly different from `labels'.
1215 The difference is that it relies on the `lexical-binding' machinery
1216 (as opposed to the `lexical-let' machinery used previously) to capture
1217 definitions in closures, so such closures will only work if `lexical-binding'
1220 *** `cl-letf' is not exactly like `letf'.
1221 The only difference is in details that relate to some deprecated usage
1222 of `symbol-function' in place forms.
1224 *** `progv' was rewritten to use the `let' machinery.
1225 A side effect is that variables without corresponding values are bound
1226 to nil rather than being made unbound.
1228 *** The following methods of extending `setf' are obsolete
1229 (use features from gv.el instead):
1230 `define-modify-macro' (use `gv-letplace')
1231 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1232 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1233 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1237 *** Changes are now highlighted using the same color scheme as in
1238 modern VCSes. Deletions are displayed in red (new faces
1239 `diff-refine-removed' and `smerge-refined-removed', and new definition
1240 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1241 and `smerge-refined-added', and new definition of `diff-added').
1243 *** The variable `diff-use-changed-face' defines whether to use the
1244 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1245 changes in context diffs.
1247 *** The new command `diff-delete-trailing-whitespace' removes trailing
1248 whitespace introduced by a diff.
1250 ** Ediff now uses the same color scheme as Diff mode.
1254 A new version of python.el, which provides several new features, including:
1255 per-buffer shells, better indentation, Python 3 support, and improved
1256 shell-interaction compatible with iPython (and virtually any other
1259 *** Some user options have been replaced/renamed, including (old -> new):
1260 **** python-indent -> python-indent-offset
1261 **** python-guess-indent -> python-indent-guess-indent-offset
1262 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1263 **** python-use-skeletons -> python-skeleton-autoinsert
1265 *** Some user options have been removed, including:
1267 **** `python-indent-string-contents': Strings are never indented.
1269 **** `python-honour-comment-indentation':
1270 Comments are always considered as indentation markers.
1272 **** `python-continuation-offset': Indentation is automatically
1273 calculated in a pep8 compliant way depending on the context.
1275 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1276 Have no direct mapping as the shell interaction is completely different.
1278 **** `python-python-command', `python-jython-command':
1279 Replaced by `python-shell-interpreter'.
1281 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1282 `python-pdbtrack-minor-mode-string', `python-source-modes':
1285 *** Some commands have been replaced (old -> new):
1286 **** python-insert-class -> python-skeleton-class
1287 **** python-insert-def -> python-skeleton-def
1288 **** python-insert-for -> python-skeleton-for
1289 **** python-insert-if -> python-skeleton-if
1290 **** python-insert-try/except -> python-skeleton-try
1291 **** python-insert-try/finally -> python-skeleton-try
1292 **** python-insert-while -> python-skeleton-while
1293 **** python-find-function -> python-nav-jump-to-defun
1294 **** python-next-statement -> python-nav-forward-sentence
1295 **** python-previous-statement -> python-nav-backward-sentence
1296 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1297 **** python-end-of-defun-function -> python-nav-end-of-defun
1298 **** python-send-buffer -> python-shell-send-buffer
1299 **** python-send-defun -> python-shell-send-defun
1300 **** python-send-region -> python-shell-send-region
1301 **** python-send-region-and-go -> emulate with python-shell-send-region
1302 and python-shell-switch-to-shell
1303 **** python-send-string -> python-shell-send-string
1304 **** python-switch-to-python -> python-shell-switch-to-shell
1305 **** python-describe-symbol -> python-eldoc-at-point
1309 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1311 *** The D-Bus object manager interface is implemented.
1313 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1314 if their value does not fit into Emacs's integer range.
1316 *** The function `dbus-call-method' is now non-blocking.
1317 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1319 *** Signals can also be sent as unicast messages.
1321 *** The argument list of `dbus-register-signal' has been extended,
1322 according to the new match rule types of D-Bus.
1324 *** `dbus-init-bus' supports private connections.
1326 *** There is a new function `dbus-setenv'.
1328 ** `desktop-path' no longer includes the "." directory.
1329 Desktop files are now located in ~/.emacs.d by default.
1333 *** `dired-do-async-shell-command' executes each file sequentially
1334 if the command ends in `;' (when operating on multiple files).
1335 Otherwise, it executes the command on each file in parallel.
1337 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1338 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1341 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1342 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1343 mark/unmark/flag all files in the active region.
1345 *** The minibuffer default for `=' (`dired-diff') has changed.
1346 It is now the backup file for the file at point, if one exists.
1347 In Transient Mark mode the default is the file at the active mark.
1349 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1350 The global binding for `M-=', `count-words-region' is in effect.
1354 *** New module "notifications", which can send a notification when you
1355 receive a private message or your nickname is mentioned.
1357 *** ERC will look up server/channel names via auth-source and use any
1360 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1361 only applies to messages sent by lurkers.
1363 ** reStructuredText mode
1365 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1366 fontification, comment handling, and customization have all been revised
1369 *** Support for `imenu' and `which-function-mode'.
1371 *** The reStructuredText syntax is more closely covered.
1372 Sphinx support has been improved.
1374 *** `rst-insert-list' inserts new list or continues existing lists.
1376 *** A negative prefix argument always works for `rst-adjust'.
1378 *** The window configuration is reset after displaying a TOC.
1380 *** The constant `rst-version' describes the rst.el package version.
1384 *** Support for percent literals and recognition of regular expressions
1385 in method calls without parentheses with more methods, including Cucumber
1388 *** Improved syntax highlighting and indentation.
1390 *** New command `ruby-toggle-block', bound to `C-c {'.
1392 *** Some non-standard keybindings/commands have been removed:
1394 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1396 **** `ruby-mark-defun'; use `mark-defun'.
1398 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1399 appropriate settings for the variables `beginning-of-defun-function'
1400 and `end-of-defun-function'.
1402 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1403 `reindent-then-newline-and-indent' and `newline' have been removed.
1405 ** Shell Script mode
1407 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1409 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1411 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1415 *** The free software compiler GHDL is supported (and now the default).
1417 *** Support for the VHDL-AMS packages has been added/updated.
1419 *** Updated to the 2002 revision of the VHDL standard.
1421 *** Accepts \r and \f as whitespace.
1425 *** The faces used by Apropos are now directly customizable.
1426 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1427 see the `apropos' Custom group for details.
1429 *** The old options whose values specified faces to use have been removed
1430 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1434 *** This package has been rewritten to use Tabulated List mode.
1436 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1437 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1441 *** Algebraic simplification mode is now the default.
1442 To restrict to the limited simplifications given by the former
1443 default simplification mode, use `m I'.
1447 *** You can customize the header text that appears above each calendar month.
1448 See the variable `calendar-month-header'.
1450 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1452 *** The calendars produced by cal-html include holidays.
1453 Customize `cal-html-holidays' to change this.
1457 *** The major modes from the parser generators "Bovine" and "Wisent"
1458 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1459 are in `auto-mode-alist', and the corresponding manuals are included.
1463 **** Menu support for the "Configuration" feature. This allows users to
1464 choose the active configuration (such as debug or install) from the menu.
1466 **** New command `ede-set' to interactively set project-local variables.
1468 **** Support for compiling, debugging, and running in "generic" projects.
1470 **** Autoconf editing support for M4 macros with complex arguments.
1472 **** Compilation support for the "linux" project type.
1474 **** "simple" projects have been removed; use "generic" projects instead.
1478 **** Support for parsing #include statements inside a namespace in C/C++.
1480 **** Improved support for 'extern "C"' declarations in C/C++.
1482 **** The ability to ignore more common special C/C++ preprocessor symbols,
1483 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1484 If available, include cdefs.h as an additional source of preprocessor symbols.
1486 **** Improved C/C++ function pointer parsing.
1488 **** In Python, support for converting imports to include file names.
1490 **** Ability to dynamically determine the Python load path.
1492 **** Support for the Python 'WITH' and 'AT' keywords.
1494 **** Improved tooltip completion.
1498 **** The SRecode manual is now included.
1500 **** Tag generation supports constructor/destructor settings and system
1501 include differentiation.
1503 **** Addition of 'Framework' support: Frameworks are specified when a
1504 particular kind of library (such as Android) is needed in a common language
1507 **** Support for nested templates and let variables override based on priority.
1509 **** Support for merging tables from multiple related modes, such as
1510 default -> c++ -> arduino.
1512 ** Compile has a new option `compilation-always-kill'.
1516 *** `custom-reset-button-menu' now defaults to t.
1518 *** Non-option variables are never matched in `customize-apropos' and
1519 `customize-apropos-options' (i.e., the prefix argument does nothing for
1520 these commands now).
1524 *** The variables `term-default-fg-color' and `term-default-bg-color'
1525 are now deprecated in favor of the customizable face `term'.
1527 *** You can customize how to display ANSI terminal colors and styles
1528 by customizing the corresponding `term-color-<COLOR>',
1529 `term-color-underline' and `term-color-bold' faces.
1533 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1535 *** Remote processes are now also supported on remote MS-Windows hosts.
1539 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1540 Previously, this slot stored semicolon-separated attribute-value pairs
1541 appended to some imap URLs, but this is not compatible with RFC 3986.
1542 So now the `filename' slot stores the entire path and query components,
1543 and the `attributes' slot is always nil.
1545 *** New function `url-encode-url' for encoding a URI string.
1546 The `url-retrieve' function now uses this to encode its URL argument,
1547 in case that is not properly encoded.
1549 *** New command `url-cookie-list' displays all the current cookies, and
1550 allows deleting selected cookies.
1552 ** notifications.el supports now version 1.2 of the Notifications API.
1553 The function `notifications-get-capabilities' returns the supported
1556 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1557 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1558 `flymake-warning-bitmap'.
1560 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1561 specifying URL types that should be converted to remote file names at
1562 the FFAP prompt. The default is now '("ftp").
1564 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1565 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1567 ** New option `mouse-avoidance-banish-position' specifies where the
1568 `banish' mouse avoidance setting moves the mouse.
1570 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1571 closing brackets to be aligned with the line of the opening bracket.
1573 ** In Proced mode, new command `proced-renice' renices marked processes.
1575 ** New option `async-shell-command-buffer' specifies the buffer to use
1576 for a new asynchronous `shell-command' when the default output buffer
1577 `*Async Shell Command*' is already in use.
1579 ** SQL mode has a new option `sql-db2-escape-newlines'.
1580 If non-nil, newlines sent to the command interpreter will be escaped
1581 by a backslash. The default does not escape the newlines and assumes
1582 that the sql statement will be terminated by a semicolon.
1584 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1585 (and modes that derive from it), sorts the column at point, or the Nth
1586 column if a numeric prefix argument is given.
1588 ** `which-func-modes' now defaults to t, so Which Function mode, when
1589 enabled, applies to all applicable major modes.
1591 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1594 ** Follow mode no longer works by using advice.
1595 The option `follow-intercept-processes' has been removed.
1597 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1599 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1600 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1601 *** semantic-change-hooks -> semantic-change-functions
1602 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1603 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1604 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1605 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1606 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1607 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1608 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1609 *** rcirc-activity-hooks -> rcirc-activity-functions
1610 *** rcirc-print-hooks -> rcirc-print-functions
1611 *** dbus-event-error-hooks -> dbus-event-error-functions
1612 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1613 *** checkdoc-style-hooks -> checkdoc-style-functions
1614 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1615 *** archive-extract-hooks -> archive-extract-hook
1616 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1617 *** hfy-post-html-hooks -> hfy-post-html-hook
1618 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1619 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1620 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1621 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1623 ** Obsolete packages
1626 In most cases, assoc+member+push+delq work just as well.
1627 And in any case it's just a terrible package: ugly semantics, terrible
1628 inefficiency, and not namespace-clean.
1637 * Incompatible Lisp Changes in Emacs 24.3
1639 ** Docstrings starting with `*' no longer indicate user options.
1640 Only variables defined using `defcustom' are considered user options.
1641 The function `user-variable-p' is now an obsolete alias for
1642 `custom-variable-p'.
1644 ** The return values of `defalias', `defun' and `defmacro' have changed,
1645 and are now undefined. For backwards compatibility, `defun' and
1646 `defmacro' currently return the name of the newly defined
1647 function/macro, but this should not be relied upon.
1649 ** `random' by default now returns a different random sequence in
1650 every Emacs run. Use `(random S)', where S is a string, to set the
1651 random seed to a value based on S, in order to get a repeatable
1652 sequence in later calls.
1654 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1655 that substring is inserted literally even if the LITERAL arg is
1656 non-nil, instead of causing an error to be signaled.
1658 ** `select-window' now always makes the window's buffer current.
1659 It does so even if the window was selected before.
1661 ** The function `x-select-font' can return a font spec, instead of a
1662 font name as a string. Whether it returns a font spec or a font name
1663 depends on the graphical library.
1665 ** `face-spec-set' no longer sets frame-specific attributes when the
1666 third argument is a frame (that usage was obsolete since Emacs 22.2).
1668 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1670 ** The CL package's `get-setf-method' function no longer exists.
1671 Generalized variables are now part of core Emacs Lisp, and implemented
1672 differently to the way cl.el used to do it. It is not possible to
1673 define a compatible replacement for `get-setf-method'. See the file
1674 gv.el for internal details of the new implementation.
1676 ** The arguments of `dbus-register-signal' are no longer just strings,
1677 but keywords or keyword-string pairs. The old argument list will
1678 still be supported for Emacs 24.x.
1680 ** Miscellaneous name changes
1681 Some Lisp symbols have been renamed to correct their spelling,
1682 or to be more consistent with standard Emacs terminology.
1684 *** Renamed functions
1685 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1686 **** inactivate-input-method -> deactivate-input-method
1687 **** quail-inactivate -> quail-deactivate
1688 **** robin-inactivate -> robin-deactivate
1689 **** viper-inactivate-input-method -> viper-deactivate-input-method
1690 **** viper-inactivate-input-method-action ->
1691 viper-deactivate-input-method-action
1692 **** ucs-input-inactivate -> ucs-input-deactivate
1695 The old hooks are still supported for backward compatibility, but they
1696 are deprecated and will be removed eventually.
1697 **** input-method-inactivate-hook -> input-method-deactivate-hook
1698 **** robin-inactivate-hook -> robin-deactivate-hook
1699 **** quail-inactivate-hook -> quail-deactivate-hook
1701 *** Renamed variables
1702 **** follow-deactive-menu -> follow-inactive-menu
1703 **** inactivate-current-input-method-function ->
1704 deactivate-current-input-method-function
1706 ** Some obsolete functions, variables, and faces have been removed:
1707 *** `last-input-char', `last-command-char', `unread-command-char'
1708 *** `facemenu-unlisted-faces'
1709 *** `rmail-decode-mime-charset'
1710 *** `iswitchb-read-buffer'
1711 *** `sc-version', `sc-submit-bug-report'
1712 *** `set-char-table-default'
1713 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1714 *** `compile-internal'
1716 *** `mode-line-inverse-video'
1717 *** `follow-mode-off-hook'
1718 *** `cvs-commit-buffer-require-final-newline'
1719 (use `log-edit-require-final-newline' instead)
1720 *** `cvs-changelog-full-paragraphs'
1721 (use `log-edit-changelog-full-paragraphs' instead)
1722 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1723 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1724 *** `vc-master-templates' (use `vc-handled-backends' instead)
1725 *** `vc-checkout-carefully'
1728 * Lisp Changes in Emacs 24.3
1730 ** CL-style generalized variables are now in core Elisp.
1731 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1732 You can define your own generalized variables using `gv-define-simple-setter',
1733 `gv-define-setter', etc.
1735 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1736 This can significantly speed up execution of non-byte-compiled code,
1737 but can also bump into previously unnoticed cyclic dependencies.
1738 These are generally harmless: they will simply cause the macro calls
1739 to be left for later expansion (as before), but will result in a
1740 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1741 You may wish to restructure your code so this does not happen.
1743 ** New sampling-based Elisp profiler.
1744 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1745 When finished, use M-x profiler-stop. The sampling rate can be based on
1746 CPU time or memory allocations.
1748 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1749 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1751 ** New macros `setq-local' and `defvar-local'.
1753 ** Face underlining can now use a wave.
1755 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1756 of `read-regexp' accepts a string ending with a colon and space, and its
1757 second argument DEFAULTS can be a list of strings accessible via `M-n'
1758 in the minibuffer ahead of other hard-coded useful regexp-related values.
1759 More commands use `read-regexp' now to read their regexp arguments.
1763 *** New function `completion-table-with-quoting' to handle completion
1764 in the presence of quoting, such as file completion in shell buffers.
1766 *** New function `completion-table-subvert' to use an existing completion
1767 table, but with a different prefix.
1771 *** New error type and new function `user-error'.
1772 These do not trigger the debugger.
1774 *** New option `debugger-bury-or-kill', saying what to do with the
1775 debugger buffer when exiting debug.
1777 *** Set `debug-on-message' to enter the debugger when a certain
1778 message is displayed in the echo area. This can be useful when trying
1779 to work out which code is doing something.
1781 *** New var `inhibit-debugger', automatically set to prevent accidental
1782 recursive invocations.
1786 *** New command `fit-frame-to-buffer' adjusts the frame height to
1789 *** The command `fit-window-to-buffer' can adjust the frame height
1790 if the new option `fit-frame-to-buffer' is non-nil.
1792 *** New macro `with-temp-buffer-window', similar to
1793 `with-output-to-temp-buffer'.
1795 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1798 *** New option `switch-to-buffer-preserve-window-point' to restore a
1799 window's point when switching buffers.
1801 *** New display action alist entries `window-height' and `window-width'
1802 specify the size of new windows created by `display-buffer'.
1804 *** New display action alist entry `pop-up-frame-parameters', if
1805 non-nil, specifies frame parameters to give any newly-created frame.
1807 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1808 tells display action functions to avoid changing which frame is
1811 *** New display action alist entry `previous-window', if non-nil,
1812 specifies window to reuse in `display-buffer-in-previous-window'.
1814 *** New display action functions `display-buffer-below-selected',
1815 and `display-buffer-in-previous-window'.
1817 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1818 now accept a third argument to avoid choosing the selected window.
1820 *** Additional values recognized for option `window-combination-limit'.
1822 *** The following variables are obsolete, as they can be replaced by
1823 appropriate entries in the `display-buffer-alist' function introduced
1825 **** `dired-shrink-to-fit'
1826 **** `display-buffer-reuse-frames'
1827 **** `display-buffer-function'
1828 **** `special-display-buffer-names'
1829 **** `special-display-frame-alist'
1830 **** `special-display-function'
1831 **** `special-display-regexps'
1835 *** `current-time-string' no longer requires that its argument's year
1836 must be in the range 1000..9999. It now works with any year supported
1837 by the underlying C implementation.
1839 *** `current-time' now returns extended-format time stamps
1840 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1841 PSEC is typically a multiple of 1000 on current machines. Other
1842 functions that use this format, such as `file-attributes' and
1843 `format-time-string', have been changed accordingly. Old-format time
1844 stamps are still accepted.
1846 *** The format of timers in `timer-list' and `timer-idle-list' is now
1847 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1848 The PSECS slot is new, and uses picosecond resolution. It can be
1849 accessed via the new `timer--psecs' accessor.
1851 *** Last-modified time stamps in undo lists now are of the form
1852 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1856 *** Improved security when handling persistent objects:
1858 **** `eieio-persistent-read' now features optional arguments for specifying
1859 the class to load, as well as a flag stating whether subclasses are allowed;
1860 if provided, other classes will be rejected by the reader. For
1861 compatibility with existing code, if the class is omitted only a
1864 **** New specialized reader for pulling in classes and signaling errors
1865 without evaluation of suspicious code.
1867 **** All slots that contain objects must have a :type. Slots with lists
1868 of objects must use a new type predicate for a list of an object type.
1870 *** Support for `find-function' and similar utilities, through the addition
1871 of filename support to generated symbols.
1873 ** Floating point functions now always return special values like NaN,
1874 instead of signaling errors, if given invalid args; e.g., (log -1.0).
1875 Previously, they returned NaNs on some platforms but signaled errors
1876 on others. The affected functions are acos, asin, tan, exp, expt,
1877 log, log10, sqrt, and mod.
1879 ** New fringe bitmap `exclamation-mark'.
1881 ** Miscellaneous changes to special forms and macros
1883 *** `defun' and `defmacro' are now macros rather than special forms.
1885 *** `kbd' is now a function rather than a macro.
1887 ** Miscellaneous new functions
1889 *** `set-temporary-overlay-map' sets up a temporary keymap that
1890 takes precedence over most other maps for a short while (normally one key).
1892 *** `autoloadp' tests if its argument is an autoloaded object.
1894 *** `autoload-do-load' performs the autoloading operation.
1896 *** `buffer-narrowed-p' tests if the buffer is narrowed.
1898 *** `file-name-base' returns a file name sans directory and extension.
1900 *** `function-get' fetches a function property, following aliases.
1902 *** `posnp' tests if an object is a `posn'.
1904 *** `system-users' returns the user names on the system.
1906 *** `system-groups' returns the group names on the system.
1908 *** `tty-top-frame' returns the topmost frame of a text terminal.
1910 ** The following functions and variables are obsolete:
1911 *** `automount-dir-prefix' (use `directory-abbrev-alist')
1912 *** `buffer-has-markers-at'
1913 *** `macro-declaration-function' (use `macro-declarations-alist')
1914 *** `window-system-version' (provides no useful information)
1915 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
1916 *** `query-replace-interactive'
1917 *** `font-list-limit' (has had no effect since Emacs < 23)
1920 * Changes in Emacs 24.3 on Non-Free Operating Systems
1922 ** Cygwin builds can use the native MS Windows user interface.
1923 Pass `--with-w32' to configure. The default remains the X11 interface.
1925 ** Two new functions are available in Cygwin builds:
1926 `cygwin-convert-file-name-from-windows' and
1927 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
1928 code to access the Cygwin file-name mapping machinery to convert
1929 between Cygwin and Windows-native file and directory names.
1931 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
1932 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
1933 `mouse-autoselect-window'.
1935 ** On MS Windows Vista and later Emacs now supports symbolic links.
1937 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
1938 support for libxml2, even if its presence is detected.
1940 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1942 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
1943 directories to the search path. You must add them yourself if you want them.
1946 * Changes in Emacs 24.2
1948 ** This is mainly a bug-fix release.
1951 * Installation Changes in Emacs 24.1
1953 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1954 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1955 also depend on Gtk+. You can disable them with --without-rsvg and
1958 ** Emacs can be compiled with GnuTLS support.
1959 This happens by default if a suitably recent version of the library is
1960 found at build time. To prevent this, use the configure option
1961 `--without-gnutls'. See below for GnuTLS features.
1963 ** Emacs can be compiled with SELinux support.
1964 This happens by default if a suitably recent version of the library is
1965 found at build time. To prevent this, use the configure option
1966 `--without-selinux'. See below for SELinux features.
1968 ** Emacs can be compiled with ImageMagick support.
1969 This happens by default if a suitably recent version of the library is
1970 found at build time. To prevent this, use the configure option
1971 `--without-imagemagick'. See below for ImageMagick features.
1972 This feature is not available for the Nextstep or MS ports.
1974 ** Emacs can be compiled with libxml2 support.
1975 This happens by default if a suitably recent version of the library is
1976 found at build time. To prevent this, use the configure option
1977 `--without-xml2'. See below for libxml2 features.
1979 ** By default, the installed Info and man pages are compressed.
1980 You can disable this by configuring --without-compress-info.
1982 ** New configure option --with-wide-int.
1983 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
1984 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1987 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
1988 These provide no new functionality, they just remove the need to edit
1989 lib-src/Makefile by hand in order to use the associated features.
1991 ** New configure option --enable-use-lisp-union-type.
1992 This is only useful for Emacs developers to debug certain types of bugs.
1993 This is not a new feature; only the configure flag is new.
1995 ** The standalone programs digest-doc and sorted-doc are removed.
1996 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1998 ** The standalone program `fakemail' is removed.
1999 If you need it, feedmail.el provides a superset of the functionality.
2002 * Startup Changes in Emacs 24.1
2004 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2005 command line arguments, and the EMACS_UNIBYTE environment variable, no
2006 longer have any effect. (They were declared obsolete in Emacs 23.)
2008 ** New command line option `--no-site-lisp' removes site-lisp directories
2009 from load-path. -Q now implies this. This option does not affect the
2010 EMACSLOADPATH environment variable (and hence has no effect for
2014 * Changes in Emacs 24.1
2018 *** Many packages now use the `completion-at-point' command,
2019 rather than implementing separate completion commands.
2021 *** `completion-at-point' now handles tags and semantic completion.
2023 *** Completion in a non-minibuffer now tries to detect the end of completion
2024 and pops down the *Completions* buffer accordingly.
2026 *** New option `completion-cycle-threshold' allows completion cycling.
2028 *** New option `completion-category-overrides' for overriding the
2029 default completion style in certain circumstances.
2031 *** New completion style `substring'.
2033 *** Completion of buffer names uses `substring' completion by default.
2035 *** The option `widget-complete-field' has been removed.
2039 *** The first time you try sending mail, Emacs asks for a mail method.
2040 This is implemented by a new default for `send-mail-function', which
2041 is `sendmail-query-once'. This offers to use the smtpmail package, or
2042 to use the old defaults relying on external mail facilities
2043 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2044 `mailclient-send-it' on Windows).
2046 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2047 transfers the report to your desktop's preferred mail client, if there
2048 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2051 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2052 and Mail mode changes
2054 ** Emacs server and client changes
2056 *** New option `server-port' specifies the port for TCP Emacs servers.
2058 *** New emacsclient argument -q/--quiet suppresses some status messages.
2060 *** New emacsclient argument --frame-parameters specifies the frame
2061 parameters of any newly-created graphical frame.
2063 *** If emacsclient shuts down due to Emacs signaling an error,
2064 its exit status is 1.
2066 *** New emacsclient argument --parent-id ID.
2067 This opens a client frame in parent X window ID, via XEmbed, similar
2068 to the --parent-id argument to Emacs.
2070 ** Internationalization changes
2072 *** Emacs now supports display and editing of bidirectional text.
2073 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2074 displayed in the correct visual order as expected by users of those
2075 scripts. The display reordering is a "full bidirectionality" class
2076 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2077 with no RTL text should look exactly the same as before.
2079 **** New buffer-local variable `bidi-display-reordering'.
2080 To disable display reordering in a buffer, change this to nil.
2082 **** New buffer-local variable `bidi-paragraph-direction'.
2083 If nil (the default), Emacs determines the base direction of each
2084 paragraph from its text, as specified by the UBA. Setting the value
2085 to `right-to-left' or `left-to-right' forces a base direction on each
2088 Paragraphs with right-to-left base direction are displayed starting at
2089 the right window edge.
2091 *** Enhanced support for characters with no glyphs in available fonts,
2092 or, on text terminals, characters that cannot be encoded by the
2093 terminal coding system. The new option `glyphless-char-display-control'
2094 specifies how to display them: as a hexadecimal code in a box, a thin
2095 1-pixel space, an empty box, etc.
2097 *** New input methods for Farsi and Bulgarian
2098 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2100 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2101 (U+2010 and U+2011).
2103 *** New Hebrew translation of the Emacs Tutorial.
2104 Type `C-u C-h t' to choose it in case your language setup doesn't
2105 automatically select it.
2107 ** An Emacs Lisp package manager is now included.
2108 This is a convenient way to download and install additional packages,
2109 from a package repository at http://elpa.gnu.org.
2111 *** M-x list-packages shows a list of packages, which can be
2112 selected for installation.
2114 *** New command `describe-package', bound to `C-h P'.
2116 *** By default, all installed packages are loaded automatically when
2117 Emacs starts up. To disable this, set `package-enable-at-startup' to
2118 nil. To specify the packages to load, customize `package-load-list'.
2120 ** Custom theme changes
2122 *** New command `M-x customize-themes', which provides a convenient
2123 interface for enabling and disabling Custom themes.
2125 *** New option `custom-theme-load-path' is the load path for themes.
2126 Emacs no longer looks for Custom themes in `load-path'. The default
2127 value of `custom-theme-load-path' says to look for themes in
2128 `custom-theme-directory', followed by a subdirectory of
2129 `data-directory' named "themes/", which contains a small selection of
2130 built-in Custom themes.
2132 *** New option `custom-safe-themes' records known-safe theme files.
2133 If a theme is not in this list, Emacs queries before loading it, and
2134 offers to save the theme to `custom-safe-themes' automatically. By
2135 default, all themes included in Emacs are treated as safe.
2137 ** Improved GTK integration
2139 *** GTK scroll-bars are now placed on the right by default.
2140 The function `set-scroll-bar-mode' can change this.
2142 *** GTK tool bars can have just text, just images or images and text.
2143 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2144 the default is taken from desktop settings.
2146 *** GTK tool bars can be placed on any edge of the frame.
2147 The frame-parameter tool-bar-position controls this. It takes the
2148 values top, left, right or bottom. The Options => Show/Hide menu has
2151 *** The default colors for selected text (the `region' face) are taken
2152 from the GTK theme when Emacs is built with GTK.
2154 *** Emacs uses GTK tooltips by default if built with GTK.
2155 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2157 ** Graphical interface changes
2159 *** On graphical displays, the mode-line no longer ends in dashes.
2160 Also, the first dash (which does not indicate anything) is just
2161 displayed as a space.
2163 *** `menu-bar-select-buffer-function' lets you choose another operation
2164 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2166 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2167 built with Xft. These fonts can be set via X resources, for example:
2168 Emacs.pane.menubar.font: Courier-12
2172 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2173 or if it receives a SIGINT signal in batch mode.
2175 *** `kill-emacs-hook' is now also run in batch mode.
2176 Third-party code which adds to `kill-emacs-hook' should check if they
2177 do the right thing in batch mode.
2179 ** Scrolling changes
2181 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2182 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2183 of buffer at first key-press (instead they move to top/bottom of buffer)
2184 when `scroll-error-top-bottom' is non-nil.
2186 *** New option `scroll-error-top-bottom' (see above).
2188 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2189 scroll a line instead of full screen.
2191 *** New property `scroll-command' should be set on a command's symbol to
2192 define it as a scroll command affected by `scroll-preserve-screen-position'.
2194 *** If you customize `scroll-conservatively' to a value greater than 100,
2195 Emacs will never recenter point in the window when it scrolls due to
2196 cursor motion commands or commands that move point (e.f., `M-g M-g').
2197 Previously, you needed to use `most-positive-fixnum' as the value of
2198 `scroll-conservatively' to achieve the same effect.
2200 *** "Aggressive" scrolling now honors the scroll margins.
2201 If you customize `scroll-up-aggressively' or
2202 `scroll-down-aggressively' and move point off the window, Emacs now
2203 scrolls the window so as to avoid positioning point inside the scroll
2206 ** Basic SELinux support has been added.
2207 This requires Emacs to be linked with libselinux at build time.
2209 *** Emacs preserves the SELinux file context when backing up.
2210 Also, the function `copy-file' has an extra optional argument for
2211 preserving SELinux context, and the return value of `backup-buffer'
2212 now includes the SELinux context.
2214 *** New functions `file-selinux-context' and `set-file-selinux-context'
2215 get and set the SELinux context of a file.
2219 *** `delete-by-moving-to-trash' now only affects commands that specify
2220 trashing. This avoids inadvertently trashing temporary files.
2222 *** Calling `delete-file' or `delete-directory' with a prefix argument
2223 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2225 ** File- and directory-local variable changes
2227 *** You can stop directory local vars from applying to subdirectories.
2228 Add an element (subdirs . nil) to the alist portion of any variables
2229 settings to indicate that the section should not apply to
2232 *** Directory local variables can apply to some file-less buffers.
2233 Affected modes include dired, vc-dir, and log-edit. For example,
2234 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2235 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2236 `hack-dir-local-variables-non-file-buffer' to support this.
2238 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2239 Instead, use "eval: (minor-mode 1)".
2241 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2242 to `inhibit-local-variables-regexps'. As the name suggests, it now
2243 applies to ALL file local variables, not just -*- lines. The
2244 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2249 *** The `quit-window' command now restores the last buffer displayed
2250 in the quitted window.
2252 *** Resizing an Emacs frame now preserves proportional window sizes,
2253 modulo restrictions like window minimum sizes and fixed-size windows.
2255 *** The behavior of `display-buffer' is now customizable in detail.
2257 **** New option `display-buffer-base-action' specifies a list of
2258 user-determined display "actions" (functions and optional arguments
2259 for choosing the displaying window).
2261 This takes precedence over the default display action, which is
2262 specified by `display-buffer-fallback-action'.
2264 **** New option `display-buffer-alist' maps buffer name regexps to
2265 display actions, taking precedence over `display-buffer-base-action'.
2267 *** New option `window-combination-limit'.
2268 The new option `window-combination-limit' allows to return the space
2269 obtained for resizing or creating a window more reliably to the window
2270 from which such space was obtained.
2272 *** New option `window-combination-resize'.
2273 The new option `window-combination-resize' allows to split a window that
2274 otherwise cannot be split because it's too small by stealing space from
2275 other windows in the same combination. Subsequent resizing or deletion
2276 of the window will resize all windows in the same combination as well.
2278 *** New option `frame-auto-hide-function' lets you choose between
2279 iconifying or deleting a frame when burying a buffer in a dedicated
2280 frame, or quitting a window showing a buffer in a frame of its own.
2282 *** New commands `maximize-window' and `minimize-window'.
2283 These maximize and minimize the size of a window within its frame.
2285 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2286 These functions allow to navigate through the live buffers that have
2287 been shown in a specific window.
2289 ** Minibuffer changes
2291 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2292 This is handy for minibuffer-only frames, and is also used for the feature
2293 where mouse-1 pops up *Messages*"', which can now easily be changed.
2295 *** Minibuffers set `truncate-lines' to nil.
2296 If you want to change the value to something else, you could use
2297 for example `minibuffer-setup-hook'.
2299 ** `auto-mode-case-fold' is now enabled by default.
2301 ** `backup-by-copying-when-mismatch' now defaults to t.
2303 ** New basic faces `error', `warning', `success'.
2304 These are used to highlight text indicating failure, caution or
2305 successful operation.
2307 ** New option `list-colors-sort' defines the color sort order
2308 for `list-colors-display'.
2310 ** The variable `focus-follows-mouse' now always defaults to nil.
2313 * Editing Changes in Emacs 24.1
2317 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2318 `isearch-yank-line'.
2320 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2321 `isearch-yank-kill'.
2323 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2325 ** New commands `count-words-region' and `count-words'.
2327 *** M-= is bound to `count-words-region', not `count-lines-region'.
2328 The `count-words-region' command, when called interactively, reports
2329 the number of lines, words, and characters in the region. It is a
2330 superset of the old `count-lines-region', which is now an obsolete
2333 ** The command `just-one-space' (M-SPC), if given a negative argument,
2334 also deletes newlines around point.
2338 *** New option `delete-active-region'.
2339 If non-nil, [delete] and DEL delete the region if it is active and no
2340 prefix argument is given. If set to `kill', those commands kill
2343 *** New command `delete-forward-char', bound to [delete].
2344 This is meant for interactive use, and obeys `delete-active-region'.
2345 The command `delete-char' does not obey `delete-active-region'.
2347 *** `delete-backward-char' is now a Lisp function.
2348 Apart from obeying `delete-active-region', its behavior is unchanged.
2349 However, the byte compiler now warns if it is called from Lisp; Lisp
2350 callers should use delete-char with a negative argument instead.
2352 *** The option `mouse-region-delete-keys' has been deleted.
2354 ** Selection changes.
2356 The default handling of clipboard and primary selections has been
2357 changed to conform with modern X applications. In short, most
2358 commands for killing and yanking text now use the clipboard, while
2359 mouse commands use the primary selection.
2361 In the following, we provide a list of these changes, followed by a
2362 list of steps to get the old behavior back if you prefer that.
2364 *** `select-active-regions' now defaults to t.
2365 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2366 the kill ring. The selected text is put in the primary selection, if
2367 the system possesses a separate primary selection facility (e.g. X).
2369 **** `select-active-regions' also accepts a new value, `only'.
2370 This means to only set the primary selection for temporarily active
2371 regions (usually made by mouse-dragging or shift-selection);
2372 "ordinary" active regions, such as those made with C-SPC followed by
2373 point motion, do not alter the primary selection.
2375 **** `mouse-drag-copy-region' now defaults to nil.
2377 *** mouse-2 is now bound to `mouse-yank-primary'.
2378 This pastes from the primary selection, ignoring the kill-ring.
2379 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2381 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2383 *** `x-select-enable-primary' now defaults to nil.
2384 Thus, commands that kill text or copy it to the kill-ring (such as
2385 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2387 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2388 exactly equivalent to M-w, C-w, and C-y respectively.
2390 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2391 non-nil by default, as Windows does not support the primary selection
2392 between applications.
2394 *** To return to the previous behavior, do the following:
2396 **** Change `select-active-regions' to nil.
2397 **** Change `mouse-drag-copy-region' to t.
2398 **** Change `x-select-enable-primary' to t (on X only).
2399 **** Change `x-select-enable-clipboard' to nil.
2400 **** Bind `mouse-yank-at-click' to mouse-2.
2402 *** Support for X cut buffers has been removed.
2404 *** X clipboard managers are now supported.
2405 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2407 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2408 in the current rectangle. With a prefix argument, this prompts for a
2409 number to count from and for a format string.
2411 ** `redisplay-dont-pause' now defaults to t.
2412 This makes Emacs feel more responsive to editing commands that arrive
2413 at high rate, e.g. if you lean on some key, because stopping redisplay
2414 in the middle (when this variable is nil) forces more expensive
2415 updates later on, and Emacs appears to be unable to keep up.
2417 ** The behavior of <TAB> for active regions in Text mode has changed.
2418 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2419 when the region is active causes Emacs to indent all the lines in the
2420 region, aligning them with the line previous to the first line in the
2421 region (or with the left margin if there is no previous line).
2423 ** When `occur' is called with a prefix argument, matching strings are
2424 collected into the `*Occur*' buffer without line numbers. If there
2425 are parenthesized subexpressions in the specified regexp, `occur'
2426 reads replacement text that may contain \\& and \\N whose convention
2427 follows `replace-match'.
2430 * Changes in Specialized Modes and Packages in Emacs 24.1
2432 ** Archive Mode has basic support for browsing and updating 7z archives.
2436 *** BibTeX mode now supports biblatex.
2437 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2438 `bibtex-entry-field-alist' is now an obsolete alias for
2439 `bibtex-BibTeX-entry-alist'.
2441 *** New command `bibtex-search-entries', bound to C-c C-a.
2443 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2445 *** New variable `bibtex-search-entry-globally'.
2449 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2451 *** The default browser used by the package is now the "xdg-open" program,
2452 on platforms that support it. This calls your desktop's preferred browser.
2456 *** Support for musical notes.
2458 *** Support for logarithmic units.
2460 *** No longer uses the tex prefix for TeX specific unit names when
2461 using TeX or LaTeX mode.
2463 *** New option to highlight selections using faces.
2465 *** `calc-histogram' has the option of using a vector to determine the bins.
2467 *** New "O" option prefix.
2469 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2471 ** Calendar, Diary, and Appt
2473 *** Diary entries can contain non-printing "comments".
2474 See the variable `diary-comment-start'.
2476 *** Appointments can specify their individual warning times.
2477 See the variable `appt-warning-time-regexp'.
2479 *** The function specified by `appt-disp-window-function' may be passed
2480 lists of arguments if multiple appointments are due at similar times.
2481 If you are using a custom function for this, you should update it.
2483 *** New function `diary-hebrew-birthday'.
2485 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2486 may no longer be nil, but must all be strings.
2488 *** The obsolete (since Emacs 22.1) method of enabling the appt
2489 package by adding `appt-make-list' to `diary-hook' has been removed.
2490 Use `appt-activate' instead.
2492 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2493 appt-issue-message (use the function appt-activate)
2494 appt-visible/appt-msg-window (use the variable appt-display-format)
2496 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2497 view-diary-entries, list-diary-entries, show-all-diary-entries
2501 *** New feature to "guess" the style in an existing buffer.
2502 The main entry point is M-x c-guess.
2504 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2506 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2507 Thus C-M-a will, by default, go to the beginning of the immediate function,
2510 *** "Macros with semicolons" can be registered for correct indentation.
2511 Where such a macro ends a line (no semicolon) the next statement is no longer
2512 parsed as a statement continuation.
2514 ** Comint and modes derived from it use the standard completion code.
2518 *** Compilation mode can be used without Font Lock mode.
2519 `compilation-parse-errors-function' is now obsolete.
2521 *** New variable `compilation-filter-start', which is bound while
2522 `compilation-filter-hook' runs. It records the start position of the
2523 text inserted by `compilation-filter'.
2525 *** `compilation-error-screen-columns' and `compilation-first-column'
2526 are obeyed in the editing buffer. So programming language modes can
2527 set them, whereas previously only the value in the *Compilation*
2532 *** Customize buffers now contain a search field.
2533 The search is performed using `customize-apropos'.
2534 To turn off the search field, set `custom-search-field' to nil.
2536 *** Options in customize group buffers start out hidden if not customized.
2537 Use the arrow to the left of the option name to toggle visibility.
2539 *** custom-buffer-sort-alphabetically now defaults to t.
2541 *** The color widget now has a "Choose" button, which allows you to
2542 choose a color via `list-colors-display'.
2546 *** It is now possible to access buses other than the default system
2549 *** The `dbus-register-method' and `dbus-register-property' functions
2550 optionally do not register names.
2552 *** The new function `dbus-register-service' registers a known service
2553 name on a D-Bus without also registering a property or a method.
2557 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2558 if called with a prefix argument, read a file name from the minibuffer
2559 instead of using the current buffer.
2561 *** The "dired local variables" feature of Dired-x is obsolete.
2562 The standard directory local variables feature replaces it.
2566 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2567 controlling attempts to autojoin a channel.
2569 *** New variable `erc-coding-system-precedence': If we use `undecided'
2570 as the server coding system, this variable will then be consulted.
2571 The default is to decode strings that can be decoded as utf-8 as
2572 utf-8, and do the normal `undecided' decoding for the rest.
2576 *** The default value of `eshell-directory-name' has changed
2577 to be an "eshell" directory in `user-emacs-directory'.
2578 The old "~/.eshell/" directory is still used if it exists, though.
2582 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2583 It now supports multithread non-stop debugging and simultaneous
2584 debugging of several threads.
2588 *** RET (`image-toggle-animation') toggles animation, if applicable.
2589 Animation plays once, unless the option `image-animate-loop' is non-nil.
2593 *** New command M-x info-display-manual displays a named Info manual.
2594 If that manual is already visited in some Info buffer, it displays
2595 that buffer. (This is handy if you have many manuals in many *info*
2596 buffers, and don't remember the name of the buffer visiting the manual
2597 you want to consult.) Otherwise, it loads and displays the manual.
2599 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2600 This is for compatibility with the stand-alone Info reader program,
2601 and also because `Info-edit' is a rarely used command that is disabled
2604 ** Mail mode changes (not Message mode)
2606 *** New command M-x mail-add-attachment for adding MIME attachments
2608 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2609 (Its name is misleading, since it has nothing to do with MIME
2610 attachments.) The old name is now an obsolete alias to the new name.
2612 ** MH-E has been updated to MH-E version 8.3.1.
2613 See MH-E-NEWS for details.
2615 ** Modula-2 mode provides auto-indentation.
2617 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2619 ** nXML mode no longer binds C-RET to `nxml-complete'.
2620 Completion is now performed via `completion-at-point', bound to C-M-i
2621 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2622 default), this performs tag completion.
2624 ** Org mode has been updated to version 7.8.09.
2625 See ORG-NEWS for details.
2627 ** Prolog mode has been completely revamped, with lots of additional
2628 functionality such as more intelligent indentation, electricity,
2629 support for more variants, including Mercury, and a lot more.
2633 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2634 in the Rmail incoming message.
2636 *** The variable `rmail-message-filter' no longer has any effect.
2637 This change was made in Emacs 23.1 but was not advertised at the time.
2638 Try using `rmail-show-message-hook' instead.
2642 *** M-x shell prompts for the shell path name if the default directory
2643 is a remote file name and neither the environment variable $ESHELL nor
2644 the variable `explicit-shell-file-name' is set.
2646 *** TAB is now bound to the standard `completion-at-point' command,
2647 which now implements the pcomplete rules for shell command completion.
2651 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2652 if the mail server supports them. This uses either built-in GnuTLS
2653 support, or the starttls.el library. Customize `smtpmail-stream-type'
2656 *** The variable `smtpmail-auth-credentials' has been removed.
2657 By default, the information is now stored in the file ~/.authinfo.
2658 This was the default value of smtpmail-auth-credentials. If you had
2659 customized smtpmail-auth-credentials to a list of user names and
2660 passwords, those settings are not used. During your first connection
2661 to the smtp server, Emacs will prompt for the user name and password,
2662 and offer to save them to ~/.authinfo. Or you can manually copy the
2663 credentials to ~/.authinfo. For example, if you had
2665 (setq smtpmail-auth-credentials
2666 '(("mail.example.org" 25 "jim" "s!cret")))
2668 then the equivalent line in ~/.authinfo would be
2670 machine mail.example.org port 25 login jim password s!cret
2672 See the auth-source manual for more information, e.g. on encrypting
2673 the credentials file.
2675 *** The variable `smtpmail-starttls-credentials' has been removed.
2676 If you had that set, you need to put
2678 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2680 in your ~/.authinfo file instead.
2682 *** SMTPmail defaults to using the address in the From: header as the
2683 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2684 to the address you wish to use instead.
2688 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2689 and `sql-oracle-scan-on'.
2691 *** New options controlling prompting for login parameters.
2692 Each supported product has a custom variable `sql-*-login-params',
2693 which is a list of the parameters to be prompted for before a
2694 connection is established.
2696 *** The command `sql-product-interactive' now takes a prefix argument,
2697 which causes it to prompt for an SQL product.
2699 *** Product-specific SQL interactive commands now take prefix arguments.
2700 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2701 given a prefix argument, prompt for a name for the SQL interactive
2702 buffer. This reduces the need for calling `sql-rename-buffer'.
2704 *** SQL interactive modes suppress command continuation prompts, and
2705 replace tabs with spaces. The first change impacts multiple line SQL
2706 statements entered with C-j between each line, statements yanked into
2707 the buffer and statements sent with `sql-send-*' functions. The
2708 second prevents the MySQL and Postgres interpreters from listing
2709 object name completions when sent text via `sql-send-*' functions.
2711 *** New command `sql-connect' starts a predefined SQLi session,
2712 using the login parameters from `sql-connection-alist'.
2714 *** New "Save Connection" menu item in SQLi buffers.
2715 This gathers the login params specified for the SQLi session, if it
2716 was not started by a connection, and saves them as a new connection.
2718 *** New commands for listing database objects and details:
2719 sql-list-all and sql-list-table.
2721 *** An API for manipulating SQL product definitions has been added.
2725 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2729 *** New inline access method "ksu" (kerberized su).
2731 *** The following access methods are discontinued: "ssh1_old",
2732 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2734 *** The user option `remote-file-name-inhibit-cache' controls whether
2735 remote file attributes are cached for better performance.
2737 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2738 default value to "".
2740 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2741 for remote machines which support SELinux.
2743 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2744 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2745 the degree of parallelism.
2747 ** VC and related modes
2749 *** Support for pulling on distributed version control systems.
2750 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2751 supported (currently with Bzr, Git, and Mercurial), to update the
2752 current branch and working tree. A prefix argument means to prompt
2753 the user for specifics, e.g. a pull location.
2755 *** `vc-update' is now an alias for `vc-pull'.
2757 *** Support for merging on distributed version control systems.
2758 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2759 is supported (currently with Bzr, Git, and Mercurial), to merge
2760 changes from another branch into the current one. It prompts for
2761 specifics, e.g. a merge source.
2763 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2764 shows a diff while querying the user. It defaults to t.
2766 *** Log entries in some Log View buffers can be toggled to display a
2767 longer description by typing RET (log-view-toggle-entry-display).
2768 This is currently supported for Bzr, Git, and Mercurial (to support
2769 another backend, define a `log-view-expanded-log-entry-function').
2770 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2771 use this to display the full log entry for the revision at point.
2773 *** New command `vc-ediff' allows visual comparison of two revisions
2774 of a file similar to `vc-diff', but using ediff backend.
2776 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2777 this was not advertised at the time.
2779 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2780 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2781 this was not advertised at the time.
2787 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2789 *** partial-completion-mode (complete.el) is obsolete.
2790 You can get a comparable behavior with:
2791 (setq completion-styles '(partial-completion initials))
2792 (setq completion-pcm-complete-word-inserts-delimiters t)
2794 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2796 *** pgg is obsolete (use EasyPG instead).
2798 *** sregex.el is obsolete, since rx.el is a strict superset.
2800 *** s-region.el and pc-select.el are obsolete.
2801 They are superseded by shift-select-mode, enabled by default since 23.1.
2803 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2807 *** The Landmark game is now invoked with `landmark', not `lm'.
2808 Its functions and variables have been similarly renamed.
2810 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2811 (This interfered with cua-mode.)
2813 *** f90.el has some support for Fortran 2008 syntax.
2815 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2817 *** New command `nato-region' converts text to NATO phonetic alphabet.
2820 * New Modes and Packages in Emacs 24.1
2822 ** Occur Edit mode applies edits made in *Occur* buffers to the
2823 original buffers. It is bound to "e" in Occur mode.
2825 ** New global minor mode electric-pair-mode.
2826 When enabled, typing an open parenthesis automatically inserts the
2827 matching closing one.
2829 ** New global minor mode electric-indent-mode.
2830 When enabled, typing certain characters triggers reindentation.
2831 Major modes wishing to use this can set electric-indent-chars or
2832 electric-indent-functions.
2834 ** New global minor mode electric-layout-mode.
2835 When enabled, typing certain characters automatically inserts newlines.
2836 Major modes wishing to use this can set electric-layout-rules.
2838 ** tabulated-list.el provides a generic major mode for tabulated data,
2839 from which other modes can be derived.
2841 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2843 ** secrets.el is an implementation of the Secret Service API, an
2844 interface to password managers like GNOME Keyring or KDE Wallet. The
2845 Secret Service API requires D-Bus for communication. The command
2846 `secrets-show-secrets' offers a buffer with a visualization of the
2849 ** notifications.el provides an implementation of the Desktop
2850 Notifications API. It requires D-Bus for communication.
2852 ** soap-client.el supports access to SOAP web services from Emacs.
2853 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2855 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
2857 ** New emacs-lock.el package.
2858 The previous version has been moved to obsolete/old-emacs-lock.el.
2859 Now, there is a proper minor mode `emacs-lock-mode'. Protection
2860 against exiting Emacs and killing the buffer can be set separately.
2861 The mechanism for automatically turning off protection for buffers
2862 with dead inferior processes has been generalized.
2865 * Incompatible Lisp Changes in Emacs 24.1
2867 ** Passing a nil argument to a minor mode function call now ENABLES
2868 the minor mode unconditionally. This is so that you can write e.g.
2870 (add-hook 'text-mode-hook 'foo-mode)
2872 to enable foo-mode in Text mode buffers, removing the need for
2873 `turn-on-foo-mode' style functions. This affects all mode commands
2874 defined by `define-minor-mode'. If called interactively, the mode
2875 command still toggles the minor mode.
2877 ** The return value of `backup-buffer' has changed.
2878 It is now a list of three elements, where the second element is a list
2879 describing the original file's SELinux context. If Emacs or the
2880 system lacks SELinux support, the context list is (nil nil nil nil).
2881 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
2883 ** `char-direction-table' and the `char-direction' function were deleted.
2884 They were buggy and inferior to the new support of bidirectional
2885 editing introduced in Emacs 24. If you need the bidirectional
2886 properties of a character, use `get-char-code-property' with the last
2887 argument `bidi-class'.
2889 ** `copy-directory' now copies the source directory as a subdirectory
2890 of the target directory, if the latter is an existing directory. The
2891 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2892 the contents directly into a pre-existing target directory.
2894 ** For mouse click input events in the text area, the Y pixel
2895 coordinate in the POSITION list now counts from the top of the text
2896 area, excluding any header line. Previously, it counted from the top
2899 ** Support for "old-style" backquotes, obsolete for 10+ years, has
2900 been further reduced. Now a backquote not followed by a space is
2901 always treated as a "new-style" backquote. Please remove all
2902 "old-style" backquotes from your code. If your code uses backquotes
2903 as documented in the Elisp manual, and compiles without warning, then
2904 you have nothing to do in this regard. Code not following the
2905 appropriate conventions may fail to compile.
2907 The most common cause of trouble seems to be an old-style backquote
2908 followed by a newline. Another cause of trouble is vector notation
2909 for key sequence notation: instead of [(control ,)] and [(control ')],
2910 you should write [(control ?,)] and [(control ?')], which will work in
2913 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2914 was not advertised at the time. The function `custom-initialize-delay'
2915 replaced all known uses.
2917 ** `view-buffer' now treats special mode-class in the same way that
2918 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2919 major mode is special).
2921 ** Menu and tool bar changes
2923 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
2924 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2925 With these alist entries omitted, `make-frame' checks the value of the
2926 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2927 a menu-bar or tool-bar, respectively. If the alist entries are added,
2928 they override the value of `menu-bar-mode'/`tool-bar-mode'.
2930 *** The menu bar bindings's caches are not used any more.
2931 Use (where-is-internal <def> nil t) instead.
2933 ** Regions created by mouse dragging are now normal active regions,
2934 similar to those created by shift-selection (see Selection changes
2935 above). In previous Emacs versions, these regions were delineated by
2936 `mouse-drag-overlay'; that variable has been removed.
2938 ** The fourth argument of `filter-buffer-substring' has been removed.
2939 If you want to remove text properties from the final result, simply
2940 pass the result through substring-no-properties.
2942 ** cl.el no longer provides `cl-19'.
2944 ** The following obsolete functions and aliases have been removed
2945 (the appropriate new function is given in parentheses; "not needed"
2946 means you can just remove all calls to the function in question):
2948 *** `comint-kill-output' (`comint-delete-output')
2949 *** `decompose-composite-char' (`char-to-string')
2950 *** `outline-visible' (`outline-invisible-p')
2951 *** `internal-find-face' (`facep')
2952 *** `internal-get-face' (`facep and check-face')
2953 *** `frame-update-faces' (not needed)
2954 *** `frame-update-face-colors' (`frame-set-background-mode')
2955 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2956 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2957 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2958 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2959 *** `x-make-font-unbold' (`make-face-unbold')
2960 *** `x-make-font-unitalic' (`make-face-unitalic')
2961 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2962 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2963 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2964 *** `char-bytes' (== 1)
2965 *** `isearch-return-char' (`isearch-printing-char')
2966 *** `make-local-hook' (not needed)
2967 *** `set-screen-height' (`set-frame-height')
2968 *** `set-screen-width' (`set-frame-width')
2970 ** The following obsolete variables and varaliases have been removed
2971 (the appropriate new variable is given in parentheses):
2973 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2974 *** `vc-header-alist' (`vc-BACKEND-header')
2975 *** `directory-sep-char' (== ?/)
2976 *** `font-lock-defaults-alist' (`font-lock-defaults')
2977 *** `e' (`float-e').
2979 ** The following obsolete files were removed:
2980 sc.el, x-menu.el, rnews.el, rnewspost.el
2982 ** The format of the finder-inf.el file has changed, since the Finder
2983 mechanism is now based on the package system. The variable
2984 `finder-package-info' is replaced by `package--builtins' and
2985 `finder-keywords-hash'.
2987 ** When generating autoloads, `update-directory-autoloads' no longer
2988 assumes every inspected file is in your `load-path'. It instead
2989 generates relative names according to the current `load-path'.
2992 * Lisp Changes in Emacs 24.1
2994 ** Code can now use lexical scoping by default instead of dynamic scoping.
2995 The `lexical-binding' variable enables lexical scoping for local
2996 variables. It is typically set via a file-local variable in the first
2997 line of the file, in which case it applies to all the code in that
3000 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3001 binding instead of the old dynamic binding mode.
3003 *** Lexically scoped interpreted functions are represented with a new form
3004 of function value which looks like (closure ENV ARGS &rest BODY).
3006 *** New macro `letrec' to define recursive local functions.
3008 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3009 So do `defcustom' and other forms that call `defvar' as a subroutine.
3011 *** New function `special-variable-p' to check whether a variable is
3012 declared as dynamically bound.
3014 *** The form ((lambda ...) ...) is deprecated.
3016 ** An Emacs Lisp testing tool is now included.
3017 Emacs Lisp developers can use this tool to write automated tests for
3018 their code. See the ERT info manual for details.
3020 ** Changes for bidirectional display and editing
3022 *** New function `current-bidi-paragraph-direction'.
3023 This returns the base direction of the paragraph at point.
3025 *** New function `bidi-string-mark-left-to-right'.
3026 Given a string containing characters from right-to-left scripts, this
3027 function returns another string which can be safely inserted into a
3028 buffer, such that any following text will be always displayed to the
3029 right of that string. (This works by appending an invisible Unicode
3030 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3032 This is useful when the buffer has overall left-to-right paragraph
3033 direction and you need to insert a string whose contents are not known
3034 in advance, without disrupting the layout of the line.
3038 *** Window tree functions are accessible in Elisp.
3039 Functions are provided to return the parent, siblings or child windows
3040 of any window including internal windows (windows not associated with a
3041 buffer) in the window tree.
3043 **** New function `window-valid-p' gives non-nil for live and internal
3046 **** Window manipulation can deal with internal windows.
3047 Many window handling functions like `split-window', `delete-window', or
3048 `delete-other-windows' as well as the window resizing functions can now
3049 act on any window including internal ones.
3051 *** window-total-height/-width vs window-body-height/-width.
3052 The function `window-height' has been renamed to `window-total-height'
3053 and `window-width' has been renamed to `window-body-width'. The old
3054 names are provided as aliases. Two new functions `window-total-width'
3055 and `window-body-height' are provided.
3057 *** Window parameters specific to window handling functions.
3058 For each window you can specify a parameter to override the default
3059 behavior of a number of functions like `split-window', `delete-window'
3060 and `delete-other-windows'. The variable `ignore-window-parameters'
3061 allows to ignore processing such parameters.
3063 *** New semantics of third argument of `split-window'.
3064 The third argument of `split-window' has been renamed to SIDE and can be
3065 set to any of the values 'below, 'right, 'above, or 'left to make the
3066 new window appear on the corresponding side of the window that shall be
3067 split. Any other value of SIDE will cause `split-window' to split the
3068 window into two side-by-side windows as before.
3070 *** Window resizing functions.
3071 A new standard function for resizing windows called `window-resize' has
3072 been introduced. This and all other functions for resizing windows no
3073 longer delete any windows when they become too small.
3075 *** Deleting the selected window now selects the most recently selected
3076 live window on that frame instead.
3078 *** `adjust-window-trailing-edge' adjustments.
3079 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3080 is able to resize other windows if a window adjacent to the trailing
3081 edge cannot be shrunk any more. This makes its behavior more similar to
3082 that of Emacs 21 without compromising, however, its inability to delete
3083 windows which was introduced in Emacs 22.
3085 *** Window-local buffer lists.
3086 Windows now have local buffer lists. This means that removing a buffer
3087 from display in a window will preferably show the buffer previously
3088 shown in that window with its previous window-start and window-point
3089 positions. This also means that the same buffer may be automatically
3090 shown twice even if it already appears in another window.
3092 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3093 which if non-nil requires the buffer to be displayed in the currently
3094 selected window, signaling an error otherwise. If nil, another window
3095 can be used, e.g. if the selected one is strongly dedicated.
3097 *** `split-window-vertically' and `split-window-horizontally' renamed
3098 to `split-window-below' and `split-window-right' respectively.
3099 The old names are kept as aliases.
3103 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3104 named ACTION, and takes a display action of the same form as
3105 `display-buffer-base-action' (see Changes, above). A non-nil,
3106 non-list value is treated specially, as the old meaning.
3108 **** New variable `display-buffer-overriding-action'.
3110 **** The procedure of `display-buffer' etc. to choose a window is
3111 determined by combining `display-buffer-overriding-action',
3112 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3113 and `display-buffer-fallback-action'. The second and fourth of these
3114 are user-customizable variables.
3116 See the docstring of `display-buffer' for details.
3118 *** New functions `window-state-get' and `window-state-put'.
3119 These functions allow to save and restore the state of an arbitrary
3120 frame or window as an Elisp object.
3124 *** New variable `completion-extra-properties' used to specify extra
3125 properties of the current completion:
3126 - :annotate-function, same as the old completion-annotate-function.
3127 - :exit-function, function to call after completion took place.
3129 *** Functions on `completion-at-point-functions' can return any of the
3130 properties valid for `completion-extra-properties'.
3132 *** `completion-annotate-function' is obsolete.
3134 *** New `metadata' method for completion tables. The metadata thus returned
3135 can specify various details of the data returned by `all-completions':
3136 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3137 used to select a style in completion-category-overrides.
3138 - `annotation-function' to add annotations in *Completions*.
3139 - `display-sort-function' to specify how to sort entries in *Completions*.
3140 - `cycle-sort-function' to specify how to sort entries when cycling.
3142 *** `minibuffer-local-filename-must-match-map' is not used any more.
3143 Instead, the bindings in `minibuffer-local-filename-completion-map'
3144 are combined with `minibuffer-local-must-match-map'.
3146 *** New variable `completing-read-function' allows overriding the
3147 behavior of `completing-read'.
3149 ** `glyphless-char-display' can now distinguish between graphical and
3150 text terminal display, via a char-table entry that is a cons cell.
3152 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3153 Instead, the offending function is removed.
3157 *** New function `run-hook-wrapped' for running an abnormal hook by
3158 passing the hook functions as arguments to a "wrapping" function.
3159 Like `run-hook-with-args-until-success', it stops at the first
3160 non-nil return value.
3162 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3163 set of "wrapping" filters, similar to around advice.
3164 (A version of this macro was actually added in Emacs 23.2 but was not
3165 advertised at the time.)
3169 *** New macro `condition-case-unless-debug' (this was actually added in
3170 Emacs 23.1 as condition-case-no-debug, but not advertised)
3172 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3174 *** Variable `stack-trace-on-error' removed.
3176 *** The debugger can now "continue" from an error, which means it will
3177 jump to the error handler as if the debugger had not been invoked
3178 instead of jumping all the way to the top-level.
3180 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3181 This can be useful when `inhibit-quit' is set.
3183 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3184 named Emacs server instances.
3186 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3187 to redirect STDOUT to a file.
3189 ** The function `format-time-string' now supports the %N directive,
3190 for higher-resolution time stamps.
3192 ** New input reading functions
3194 *** New function `read-char-choice' reads a restricted set of
3195 characters, discarding any inputs not inside the set.
3197 *** The command `read-color' now requires a match for a color name
3198 or RGB triplet, instead of signaling an error if the user provides
3201 **** `facemenu-read-color' is now an alias for `read-color'.
3203 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3204 The variable is now used to load all kind of supported dynamic libraries,
3205 not just image libraries. The previous name is still available as an
3208 ** Syntax parsing changes
3210 *** New variable `syntax-propertize-function'.
3211 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3212 This allows syntax-table properties to be set independently from font-lock:
3213 just call syntax-propertize to make sure the text is propertized.
3214 Together with this new variable come a new hook
3215 syntax-propertize-extend-region-functions, as well as two helper functions:
3216 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3217 as-is; and syntax-propertize-rules which provides a new way to specify
3220 *** Syntax tables support a new "comment style c" additionally to style b.
3222 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3224 ** frame-local variables cannot be let-bound any more.
3226 ** Major and minor mode changes
3228 *** `set-auto-mode' now respects mode: local variables at the end of files,
3229 as well as those in the -*- line.
3231 *** `prog-mode' is a new major mode from which programming modes
3234 **** `prog-mode-hook' can be used to enable features for programming
3235 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3236 on-the-fly spell checking for comments and strings.
3238 **** New minor modes `prettify-symbols-mode' and
3239 `global-prettify-symbols-mode' let the user enable symbol
3240 prettification (replacing a string like "lambda" with the Greek lambda
3243 *** New hook `change-major-mode-after-body-hook', run by
3244 `run-mode-hooks' just before any other mode hooks.
3246 *** Enabled globalized minor modes can be disabled in specific major modes.
3247 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3248 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3250 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3252 ** File-handling changes
3254 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3255 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3256 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3257 argument is supplied (see Trash changes, above).
3259 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3261 ** Tool-bars can display separators.
3262 Tool-bar separators are handled like menu separators in menu-bar maps,
3263 i.e. via menu entries of the form `(menu-item "--")'.
3267 *** Animated images support (currently animated gifs only).
3269 **** `image-animated-p' returns non-nil if an image can be animated.
3271 **** `image-animate' animates a supplied image spec.
3273 **** `image-animate-timer' returns the timer object for an image that
3276 *** `image-extension-data' has been renamed to `image-metadata'.
3277 The old name is an obsolete alias to the new one.
3279 *** Image mode can view any image type that ImageMagick supports.
3280 This requires Emacs to be built with ImageMagick support.
3282 **** New function `imagemagick-types', defined if ImageMagick support
3283 is enabled, returns a list of image file extensions that your
3284 ImageMagick installation supports.
3286 **** New function `imagemagick-register-types' enables ImageMagick
3287 image types in Image mode and in `create-image' and other helper
3290 **** New option `imagemagick-types-inhibit' excludes certain
3291 ImageMagick image types from `imagemagick-register-types'.
3293 **** With ImageMagick support, there are extra Image mode commands to
3294 resize and rotate images: `image-transform-fit-to-height',
3295 `image-transform-fit-to-width', `image-transform-set-rotation', and
3296 `image-transform-set-scale'.
3298 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3299 passes it to the mail user agent function. This argument specifies an
3300 action for returning to the caller after finishing with the mail. For
3301 example, this is used by Rmail to optionally delete a mail window.
3303 ** XML and HTML parsing
3304 If Emacs is compiled with libxml2 support, there are two new
3305 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3306 and `libxml-parse-xml-region' (which parses XML). Both return an
3307 Emacs Lisp parse tree.
3309 ** Networking and encryption changes
3311 *** `open-network-stream' can now be used to open an encrypted stream.
3312 It now accepts an optional `:type' parameter for initiating a TLS
3313 connection, directly or via STARTTLS. To do STARTTLS, additional
3314 parameters (`:end-of-command', `:success', `:capabilities-command')
3315 must also be supplied.
3317 *** New library gnutls.el.
3318 The new function `gnutls-available-p' returns non-nil if Emacs is
3319 built with GnuTLS support. The main entry points are
3320 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3321 these functions through `open-network-stream', because that can
3322 upgrade connections through STARTTLS opportunistically or use plain
3323 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3326 *** New primitive `secure-hash' that supports many secure hash algorithms:
3327 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3328 sha1.el has been removed. The `sha1' feature is provided by default.
3332 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3334 ** Progress reporters can now "spin".
3335 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3336 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3337 time you call `progress-reporter-update' on that progress reporter,
3338 with a nil or omitted VALUE argument, the reporter message is
3339 displayed with a "spinning bar".
3341 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3342 being reverted, even if the buffer has a local `revert-buffer-function'.
3344 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3345 If delayed-warnings-list is non-nil, the command loop calls
3346 `delayed-warnings-hook' after `post-command-hook'. At present, this
3347 is only used by Emacs on some platforms to display warnings during
3348 startup, which might otherwise not be noticed. This uses the
3349 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3351 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3353 ** New function `make-composed-keymap' that constructs a new keymap
3354 from multiple input maps. You can use this to make a keymap that
3355 inherits from multiple maps, eg:
3356 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3358 ** New function `string-prefix-p'.
3359 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3361 ** New reader macro ## that stands for the empty symbol.
3362 This means that the empty symbol can now be read back. Also, #: by itself
3363 (when not immediately followed by a possible symbol character) stands for
3364 an empty uninterned symbol.
3366 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3368 ** The following functions and variables are obsolete:
3370 *** `tooltip-use-echo-area' is obsolete.
3371 Rather than setting this to t, disable Tooltip mode instead.
3373 *** buffer-substring-filters is obsolete.
3374 Use `filter-buffer-substring-functions' instead.
3376 *** `byte-compile-disable-print-circle' is obsolete.
3378 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3379 Use `post-command-hook' instead.
3381 *** `font-lock-maximum-size' is obsolete.
3384 * Changes in Emacs 24.1 on Non-Free Operating Systems
3386 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3387 and also when HOME is set to C:\ by default.
3389 ** New configure.bat options
3391 *** --enable-checking builds Emacs with extra runtime checks.
3393 *** --distfiles specifies files to be included in binary distribution.
3395 *** --without-gnutls disables automatic GnuTLS detection.
3397 *** --lib for general library linkage, works with the USER_LIBS build variable.
3399 ** New make target `dist' to create binary distribution for MS Windows.
3401 ** The Lisp function `w32-default-color-map' is now obsolete.
3402 (It is only used internally in the Emacs C code.)
3404 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3405 reappear on mouse-over. (Requires OS X 10.6 or later.)
3407 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3408 other platforms, rather than inserting its contents into the buffer.
3411 ----------------------------------------------------------------------
3412 This file is part of GNU Emacs.
3414 GNU Emacs is free software: you can redistribute it and/or modify
3415 it under the terms of the GNU General Public License as published by
3416 the Free Software Foundation, either version 3 of the License, or
3417 (at your option) any later version.
3419 GNU Emacs is distributed in the hope that it will be useful,
3420 but WITHOUT ANY WARRANTY; without even the implied warranty of
3421 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3422 GNU General Public License for more details.
3424 You should have received a copy of the GNU General Public License
3425 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3430 paragraph-separate: "[
\f]*$"