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 ** When initializing `load-path', an empty element in the EMACSLOADPATH
67 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
68 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
69 load-path (the one that would have been used if EMACSLOADPATH was unset).
70 This makes it easier to _extend_ the load-path via EMACSLOADPATH
71 (previously, EMACSLOADPATH had to specify the complete load-path,
72 including the defaults). (In older versions of Emacs, an empty element
73 was replaced by ".", so use an explicit "." now if that is what you want.)
76 ** The -L option, which normally prepends its argument to load-path,
77 will instead append, if the argument begins with `:' (or `;' on MS Windows;
78 i.e., `path-separator').
81 * Changes in Emacs 24.4
84 ** Emacs now supports menus on text-mode terminals.
85 If the terminal supports a mouse, clicking on the menu bar, or on
86 sensitive portions of the mode line or header line, will drop down the
87 menu defined at that position. Likewise, clicking C-mouse-2 or
88 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
91 If the text terminal does not support a mouse, you can activate the
92 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
94 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
95 customize the option `tty-menu-open-use-tmm' to a non-nil value.
96 (Typing M-` will always invoke `tmm-menubar', even if
97 `tty-menu-open-use-tmm' is nil.)
99 ** Key ? also describes prefix bindings like C-h.
102 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
103 because it affects caching of paragraph scanning results as well.
106 ** `apropos-variable' is now `apropos-user-option'
107 `apropos-user-option' shows all user options while `apropos-variable'
108 shows all variables. When called with a universal prefix argument,
109 the two commands swap their behaviors. When `apropos-do-all' is
110 non-nil, they output the same results.
113 ** `eval-defun' on an already defined defcustom calls the :set function,
116 ** If the new variable `enable-dir-local-variables' is nil,
117 directory local variables are ignored. May be useful for some modes
118 that want to ignore directory-locals while still respecting file-locals.
120 ** The option `set-mark-default-inactive' has been deleted.
121 This unfinished feature was introduced by accident in Emacs 23.1;
122 simply disabling Transient Mark mode does the same thing.
124 ** `initial-buffer-choice' can now specify a function to set up the
127 ** The *Messages* buffer is created in a new major mode `messages-buffer-mode',
128 and read-only. Code that might create the *Messages* buffer should
129 call the function `messages-buffer' to do so and set the mode.
131 ** `remember-notes' creates a buffer whose content is saved on kill-emacs.
132 You may think of it as a *scratch* buffer whose content is preserved.
133 In fact, it was designed as a replacement for *scratch* buffer and can
134 be used that way by setting `initial-buffer-choice' to `remember-notes'
135 and `remember-notes-buffer-name' to "*scratch*". Without the second
136 change, *scratch* buffer will still be there for notes that do not
137 need to be preserved.
139 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
141 ** ACL support has been added.
143 *** Emacs preserves the ACL entries of files when backing up.
145 *** New functions `file-acl' and `set-file-acl' get and set the ACL
146 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
147 libacl. On MS-Windows, the NT Security APIs are used to emulate the
148 POSIX ACL interfaces.
150 ** New option `scroll-bar-adjust-thumb-portion'.
151 Available only on X, this option allows to control over-scrolling
152 using the scroll bar (i.e. dragging the thumb down even when the end
153 of the buffer is visible).
155 ** New function `add-face-text-property' has been added, which can be
156 used to conveniently prepend/append new face attributes to text.
158 ** In compiled Lisp files, the header no longer includes a timestamp.
160 ** Multi-monitor support has been added.
162 *** New functions `display-monitor-attributes-list' and
163 `frame-monitor-attributes' can be used to obtain information about
164 each physical monitor on multi-monitor setups.
166 *** The functions `display-pixel-width' and `display-pixel-height' now
167 behave consistently among the platforms: they return the pixel width
168 or height for all physical monitors associated with the given display
169 as just they were on X11. To get information for each physical
170 monitor, use the new functions above. Similar notes also apply to
171 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
172 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
174 ** New macro `alternatives-define' can be used to define generic commands.
175 Generic commands are interactive functions whose implementation can be
176 selected among several alternatives, as a matter of user preference.
178 ** New hooks `focus-in-hook', `focus-out-hook'.
179 These are normal hooks run when an Emacs frame gains or loses input focus.
181 ** The blink cursor stops blinking after 10 blinks (default) on X and NS.
182 You can change the default by customizing the variable blink-cursor-blinks.
183 Also timers for blinking are stopped when no blinking is done, so Emacs does
184 not consume CPU cycles.
186 ** New command `frameset-to-register' is now bound to `C-x r f', replacing
187 `frame-configuration-to-register'. It offers similar functionality, plus
188 some enhancements, like the ability to restore deleted frames. Command
189 `frame-configuration-to-register' is still available, but unbound.
191 ** The command `quail-help' is deleted. Use `C-h C-\'
192 (`describe-input-method') instead.
194 ** The default value of `comment-use-global-state' is changed to t,
195 and this variable has been marked obsolete.
197 ** `fill-single-char-nobreak-p' prevents fill from breaking a line after
198 a 1-letter word, which is an error according to Polish and
199 Czech typography rules. To globally enable this feature, evaluate:
201 (add-hook 'fill-nobreak-predicate 'fill-single-char-nobreak-p)
204 * Editing Changes in Emacs 24.4
206 ** Command `rectangle-mark-mode' bound to C-x SPC makes a rectangular region.
207 Most commands are still unaware of it, but kill/yank do work on the rectangle.
209 ** C-x TAB enters a transient interactive mode.
210 You can then use the left/right cursor keys to move the block of text.
212 ** `tab-stop-list' is now implicitly extended to infinity by repeating
213 the last step. Its default value is changed to nil which means a tab
214 stop every `tab-width' columns.
216 ** `split-window' is no longer a command, just a non-interactive function.
217 As a command it was a special case of `split-window-below', and as such
218 superfluous. After being reimplemented in Lisp, its interactive form
219 was mistakenly retained.
221 ** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
222 bound to <f11> and M-<f10>, respectively.
224 ** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
228 ** New option `visual-order-cursor-movement'.
229 If this is non-nil, cursor motion with arrow keys will follow the
230 visual order of characters on the screen: <left> always moves to the
231 left, <right> always moves to the right, disregarding the surrounding
232 bidirectional context.
234 ** All register commands can now show help with preview.
236 ** New command `kmacro-to-register' to store keyboard macros in registers.
240 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
241 You can pick the name of the function and the variables with `C-x 4 a'.
244 * Changes in Specialized Modes and Packages in Emacs 24.4
246 ** prolog-use-smie has been removed, along with the non-SMIE indentation code.
248 ** SMIE indentation can be customized via `smie-config'.
249 The customization can be guessed by Emacs by providing a sample indented
250 file and letting SMIE learn from it.
252 ** sh-script now uses its SMIE indentation algorithm by default.
254 ** The debugger's `e' command evaluates the code in the context at point.
255 This includes using the lexical environment at point, which means that
256 `e' now lets you access lexical variables as well.
258 ** `eshell' now supports visual subcommands and options
259 Eshell has been able to handle "visual" commands (interactive,
260 non-line oriented commands such as top that require display
261 capabilities not provided by eshell) by running them in an Emacs
262 terminal emulator. See `eshell-visual-commands'.
264 This feature has been extended to subcommands and options that make a
265 usually line-oriented command a visual command. Typical examples are
266 "git log" and "git <command> --help" which display their output in a
267 pager by default. See `eshell-visual-subcommands' and
268 `eshell-visual-options'.
270 ** If your Emacs is compiled with libxml2 support, you can use the new
271 built-in web browser `eww'.
273 ** `remember' can now store notes in separates files
274 You can use the new function `remember-store-in-files' within the
275 `remember-handler-functions' option.
277 See `remember-data-directory' and `remember-directory-file-name-format'
278 for new options related to this function.
280 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
282 ~/.emacs.d/timelog replaces ~/.timelog
283 ~/.emacs.d/vip replaces ~/.vip
284 ~/.emacs.d/viper replaces ~/.viper
285 ~/.emacs.d/ido.last replaces ~/.ido.last
286 ~/.emacs.d/kkcrc replaces ~/.kkcrc
287 ~/.emacs.d/quickurls replaces ~/.quickurls
288 ~/.emacs.d/idlwave replaces ~/.idlwave
289 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
290 ~/.emacs.d/places replaces ~/.emacs-places
291 ~/.emacs.d/shadows replaces ~/.shadows
292 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
293 ~/.emacs.d/strokes replaces ~/.strokes
294 ~/.emacs.d/notes replaces ~/.notes
295 ~/.emacs.d/type-break replaces ~/.type-break
296 Also the following files used by the now obsolete otodo-mode.el:
297 ~/.emacs.d/todo-do replaces ~/.todo-do
298 ~/.emacs.d/todo-done replaces ~/.todo-done
299 ~/.emacs.d/todo-top replaces ~/.todo-top
302 ** Delphi mode is now called OPascal mode.
303 *** All delphi-* variables and functions have been renamed to opascal-*.
304 *** `delphi-newline-always-indents' is not supported any more.
305 Use `electric-indent-mode' instead.
306 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
308 ** Eldoc Mode works properly in the minibuffer.
310 ** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
312 ** completing-read-multiple's separator can now be a regexp.
313 The default separator is changed to allow surrounding spaces around the comma.
317 *** Battery information via the BSD `apm' utility is now supported.
321 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
323 ** Calendar and Diary
325 *** New faces: `calendar-weekday-header', `calendar-weekend-header',
326 `calendar-month-header'.
328 *** New option `calendar-day-header-array'.
330 *** The variable `calendar-font-lock-keywords' is obsolete.
333 *** New variable `diary-from-outlook-function', used by the command
334 `diary-from-outlook'.
336 ** VC and related modes
338 *** In VC directory mode, `D' displays diffs between VC-controlled
339 whole tree revisions.
341 *** In VC directory mode, `L' lists the change log for the current VC
342 controlled tree in a window.
344 *** In VC directory mode, `I' shows a log of changes that will be
345 received with a pull operation.
347 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
348 under current version control system. When called with a prefix
349 argument, you can remove a file from the ignored file list.
351 *** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
352 because it is moved to vc-cvs.el.
356 *** New macro cl-tagbody.
359 *** letf is now just an alias for cl-letf.
363 *** Calc by default now uses the Gregorian calendar for all dates, and
364 uses January 1, 1 AD as its day number 1. Previously Calc used the
365 Julian calendar for dates before September 14, 1752, and it used
366 December 31, 1 BC as its day number 1; the new scheme is more
367 consistent with Calendar's calendrical system and day numbering.
369 *** The new variable `calc-gregorian-switch' lets you configure the
370 date when Calc switches from the Julian to the Gregorian calendar.
371 Nil, the default value, means to always use the Gregorian calendar.
372 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
375 *** Support for ISO 8601 dates.
379 *** `desktop-auto-save-timeout' defines the number of seconds between
380 auto-saves of the desktop.
382 *** `desktop-restore-frames', enabled by default, allows saving and
383 restoring the frame/window configuration (frameset). Additional options
384 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
385 and `desktop-restore-forces-onscreen' offer further customization.
389 *** New minor mode `dired-hide-details-mode' hides details.
393 *** New option `erc-accidental-paste-threshold-seconds'.
394 If set to a number, this can be used to avoid accidentally paste large
395 amounts of data into the ERC input.
399 *** New option `epa-mail-aliases'.
401 You can set this to a list of alias expansions for keys to use
402 in `epa-mail-encrypt'.
404 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
405 that means: when one of the recipients of the message being encrypted
406 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
408 If one element of the variable's value is ("foo@bar.com"),
409 that means: when one of the recipients of the message being encrypted
410 is `foo@bar.com', ignore that name as regards encryption.
411 This is useful to avoid a query when you have no key for that name.
414 ** New F90 mode option `f90-smart-end-names'.
416 ** Icomplete is a bit more like Ido.
417 *** key bindings to navigate through and select the completions.
418 *** The icomplete-separator is customizable, and its default has changed.
419 *** Removed icomplete-show-key-bindings.
420 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
421 (setq icomplete-with-completion-tables '(internal-complete-buffer))
422 will revert to the old behavior.
425 ** New features for Octave mode:
426 *** Font locking for texinfo comments and new keywords
427 *** Completion in Octave file buffers
429 *** Jump to definition
430 *** Documentation lookup/search
431 *** Code cleanup and various bug fixes
434 *** Ido has a manual now.
435 *** `ido-use-virtual-buffers' takes a new value 'auto.
436 *** `ido-decorations' has been slightly extended to give a bit more control.
440 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
441 visit the next image file and the previous image file in the same
442 directory, respectively.
444 *** New commands to show specific frames of multi-frame images.
445 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
446 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
448 *** New commands to speed up, slow down, or reverse animation.
451 *** The command `image-mode-fit-frame' deletes other windows.
452 When toggling, it restores the frame's previous window configuration.
453 It also has an optional frame argument, which can be used by Lisp
454 callers to fit the image to a frame other than the selected frame.
458 *** New face `info-index-match' is used to highlight matches in index
459 entries displayed by `Info-index-next', `Info-virtual-index' and
464 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
465 will cycle through faces in `hi-lock-face-defaults' without prompting.
468 *** New global command `M-s h .' (`highlight-symbol-at-point')
469 highlights the symbol found near point without prompting,
470 using the next face automatically.
472 ** Search and Replace
474 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
475 starts a symbol (identifier) incremental search forward with the
476 symbol found near point added to the search string initially.
478 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
479 and adds it to the search string.
481 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
482 between nil and the value of the option `search-invisible' (or `open'
485 *** `query-replace' skips invisible text when `search-invisible' is nil,
486 and opens overlays with hidden text when `search-invisible' is `open'.
489 *** By default, prefix arguments do not now terminate Isearch mode.
490 Set `isearch-allow-prefix' to nil to restore old behavior.
492 *** More Isearch commands accept prefix arguments, namely
493 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
496 *** Word search now matches whitespace at the beginning/end
497 of the search string if it contains leading/trailing whitespace.
498 In an incremental word search or when using a non-nil LAX argument
499 of `word-search-regexp', the lax matching can also match part of
500 the first word (in addition to the lax matching of the last word).
501 The same rules are now applied to the symbol search with the difference
502 that it matches symbols, and non-symbol characters between symbols.
504 ** MH-E has been updated to MH-E version 8.5.
505 See MH-E-NEWS for details.
508 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
509 Customize `unrmail-mbox-format' to change this.
512 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
513 of how Rmail displays non-MIME messages.
516 ** New function `ses-rename-cell' to give SES cells arbitrary names.
518 ** trace-function was largely rewritten.
519 New features include:
520 - no prompting for the destination buffer, unless a prefix-arg was used.
521 - additionally to prompting for a destination buffer, when a prefix-arg is
522 used, the user can enter a "context", i.e. Lisp expression whose value at the
523 time the function is entered/exited will be printed along with the function
524 name and arguments. Useful to trace the value of (current-buffer) or
525 (point) when the function is invoked.
527 ** New command `delete-duplicate-lines' has new types of operation:
528 When its arg ADJACENT is non-nil (when called interactively with C-u C-u)
529 it works like the utility `uniq'. Otherwise by default it deletes
530 duplicate lines everywhere in the region without regard to adjacency.
531 When its arg KEEP-BLANKS is non-nil (when called interactively with
532 C-u C-u C-u), duplicate blank lines are preserved.
534 ** New `cycle-spacing' command allows cycling between having just one
535 space, no spaces, or reverting to the original spacing. Like
536 `just-one-space' command it can handle or ignore newlines and
537 leave different number of spaces.
539 ** Todo mode has been rewritten and enhanced.
540 New features include:
541 - support for multiple todo files and archive files of done items;
542 - renaming, reordering, moving, merging, and deleting categories;
543 - sortable tabular summaries of categories and the types of items they contain;
544 - cross-category lists of items filtered by specific criteria;
545 - more fine-grained interaction with the Emacs diary, by being able to decide
546 for each todo item whether it appears in the Fancy Diary display;
547 - highly flexible new item insertion and item editing;
548 - moving items between categories, storing done items in their category or in
549 archive files, undoing or unarchiving done items;
550 - reprioritizing items by inputting a numerical priority;
551 - extensive customizability of operation and display, including numerous faces.
552 The Todo mode user manual describes all commands and most user options.
553 To support some of these features, a new file format is used, which is
554 incompatible with the old format; however, you can convert old todo and done
555 item files to the new format on initializing the first new todo file, or at any
556 later time with the provided conversion command. The old version of
557 todo-mode.el has been made obsolete and renamed otodo-mode.el.
561 *** The experimental url syntax for remote file names is withdrawn.
564 *** New connection method "adb", which allows to access Android
565 devices by the Android Debug Bridge. The variable `tramp-adb-program'
566 can be used to adapt the path of the "adb" program, if needed.
568 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
569 "scpc" and "rsyncc" are discontinued. The ssh option
570 "ControlMaster=auto" is set automatically in all ssh-based methods,
574 *** Handlers for `file-acl' and `set-file-acl' for remote machines
575 which support POSIX ACLs.
578 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
579 for remote machines which support filesystem notifications.
583 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
585 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
589 *** The commands `woman-default-faces' and `woman-monochrome-faces'
590 are obsolete. Customize the `woman-*' faces instead.
594 *** Added Eshell-Tramp module
595 External su and sudo commands are now the default; the internal,
596 Tramp-using variants can still be used by enabling the eshell-tramp
601 *** The format of `archive-contents' files, generated by package
602 repositories, has changed to allow a new (fifth) element in the data
603 vectors, containing an associative list with extra properties.
605 *** `describe-package' buffer uses the `:url' extra property to
606 display a `Homepage' header, if it's present.
608 ** New term.el option `term-suppress-hard-newline'.
610 ** Obsolete packages:
612 *** Iswitchb is made obsolete by icomplete-mode.
614 *** longlines.el is obsolete; use visual-line-mode instead.
619 *** terminal.el is obsolete; use term.el instead.
621 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
626 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
629 *** The Info-edit command is obsolete. Editing Info nodes by hand
630 has not been relevant for some time.
634 *** `explicit-bash-args' now always defaults to use --noediting.
635 During initialization, Emacs no longer expends a process to decide
636 whether it is safe to use Bash's --noediting option. These days
637 --noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
640 ** There is a new macro `skip-unless' for skipping ERT tests. See the manual.
643 * New Modes and Packages in Emacs 24.4
645 ** New `superword-mode' in subword.el
646 `superword-mode' overrides the default word motion commands to treat
647 symbol_words as a single word, similar to what `subword-mode' does and
648 using the same internal functions.
650 ** New nadvice.el package offering lighter-weight advice facilities.
652 - add-function/remove-function which can be used to add/remove code on any
653 function-carrying place, such as process-filters or `<foo>-function' hooks.
654 - advice-add/advice-remove to add/remove a piece of advice on a named function,
655 much like `defadvice' does.
657 ** New frameset.el package.
658 It provides a set of operations to save a frameset (the state of all
659 or a subset of the existing frames and windows, somewhat similar to a
660 frame configuration), both in-session and persistently, and restore it
661 at some point in the future.
664 ** The package filenotify.el provides an interface for file system
665 notifications. It requires, that Emacs is compiled with one of the
666 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
669 * Incompatible Lisp Changes in Emacs 24.4
671 ** `kill-region' lost its `yank-handler' optional argument.
673 ** `(input-pending-p)' no longer runs other timers which are ready to
674 run. The new optional CHECK-TIMERS param allows for the prior behavior.
676 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
678 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
679 Some languages match those as »...« and others as «...» so better stay neutral.
681 ** The default file coding for Emacs Lisp files is now utf-8.
682 (See file-coding-system-alist.) In most cases, this change is transparent, but
683 files that contain unusual characters without specifying an explicit coding
684 system may fail to load with obscure errors.
685 You should either convert them to utf-8 or add an explicit `coding:' cookie.
687 ** overriding-terminal-local-map does not replace the local keymaps any more.
688 It used to disable the minor mode, major mode, and text-property keymaps,
689 whereas now it simply has higher precedence.
691 ** Default process filters and sentinels are not nil any more.
692 Instead they default to a function which does what the nil value used to do.
694 ** `read-event' does not return decoded chars in ttys any more.
695 Just as was the case in Emacs-22 and before, decoding of tty input according to
696 keyboard-coding-system is not performed in read-event any more. But contrary
697 to that past, it is still done before input-decode-map/function-key-map/...
699 ** Removed inhibit-local-menu-bar-menus.
701 ** frame-local variables that affect redisplay do not work any more.
702 More specifically, the redisplay does not bother to check for a frame-local
703 value when looking up variables.
705 ** nil and "unbound" are indistinguishable in symbol-function.
706 `symbol-function' never signals `void-function' any more.
707 `fboundp' returns non-nil if the symbol was `fset' to nil.
709 ** `defadvice' does not honor the `freeze' flag and cannot advise
710 special-forms any more.
712 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
713 VAR was bound to nil which was not tremendously useful and just lead to
714 spurious warnings about an unused var.
716 ** The return value of `backup-buffer' has changed.
717 The second argument is no longer an SELinux context, instead it is an
718 alist of extended attributes as returned by the new function
719 `file-extended-attributes'. The attributes can be applied to another
720 file using `set-file-extended-attributes'.
722 ** `visited-file-modtime' now returns -1 for nonexistent files.
723 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
724 in the presence of files with negative time stamps.
726 ** The cars of the elements in `interpreter-mode-alist' are now treated
727 as regexps rather than literal strings. Technically this is an
728 incompatible change, but unless you are using interpreter-mode-alist
729 for something (not just adding elements to it), it ought not to affect you.
732 * Lisp Changes in Emacs 24.4
734 ** New hook `pre-redisplay-function'.
737 ** Functions that pop up menus and dialogs now work on all terminal types,
739 This includes `x-popup-menu', `x-popup-dialog', `message-box',
742 The function `display-popup-menus-p' will now return non-nil for a
743 display or frame whenever a mouse is supported on that display or
746 ** New bool-vector set operation functions:
747 *** `bool-vector-exclusive-or'
748 *** `bool-vector-union'
749 *** `bool-vector-intersection'
750 *** `bool-vector-set-difference'
751 *** `bool-vector-not'
752 *** `bool-vector-subsetp'
753 *** `bool-vector-count-consecutive'
754 *** `bool-vector-count-population'
756 ** Comparison functions =, <, >, <=, >= now take many arguments.
758 ** The second argument of `eval' can now be a lexical-environment.
760 ** `with-demoted-errors' takes an additional argument `format'.
762 ** New function `define-error'.
764 ** New hook `tty-setup-hook'.
767 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
769 ** New library helpers.el for misc helper functions
770 *** `hash-table-keys'
771 *** `hash-table-values'
773 ** Obsoleted functions:
776 *** `lisp-complete-symbol'
778 *** `minibuffer-completion-contents'
779 *** `isearch-nonincremental-exit-minibuffer'
780 *** `isearch-filter-visible'
781 *** `generic-make-keywords-list'
783 ** `with-wrapper-hook' is obsoleted by `add-function'.
784 The few hooks that used with-wrapper-hook are replaced as follows:
785 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
786 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
787 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
789 ** `split-string' now takes an optional argument TRIM.
790 The value, if non-nil, is a regexp that specifies what to trim from
791 the start and end of each substring.
793 ** New function `string-suffix-p'.
795 ** `get-upcase-table' is obsoleted by the new `case-table-get-table'.
797 ** Support for filesystem notifications.
798 Emacs now supports notifications of filesystem changes, such as
799 creation, modification, and deletion of files. This requires the
800 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
801 MS-Windows systems, this is supported for Windows XP and newer
804 ** Changes in autorevert.el
807 *** If Emacs is compiled with file notification support, notifications
808 are used instead of checking the time stamp of the files. You can
809 disable this by setting the user option `auto-revert-use-notify' to
810 nil. Alternatively, a regular expression of directories to be
811 excluded from file notifications can be specified by
812 `auto-revert-notify-exclude-dir-regexp'.
815 *** The new user option `auto-revert-remote-files' enables reversion
816 of remote files when set to non-nil.
820 *** The function `face-spec-set' is now analogous to `setq' for face specs.
821 Its third arg now accepts values specifying exactly which face spec to
822 set (defface, custom, or user spec), and it directly sets the relevant
823 property using the supplied face spec.
825 *** Face specs set via Custom themes now replace the `defface' spec
826 rather than inheriting from it (as do face specs set via Customize).
828 *** New face characteristic (supports :underline (:style wave))
829 specifies whether or not the terminal can display a wavy line.
831 *** New face spec attribute :distant-foreground
832 specifies foreground to use if background color is near the foreground
833 color that would otherwise have been used.
838 *** `image-animated-p' is now `image-multi-frame-p'.
839 It returns non-nil for any image that contains multiple frames,
840 whether or not it specifies a frame delay.
843 *** When animating images that do not specify a frame delay,
844 Emacs uses `image-default-frame-delay'.
847 *** New functions `image-current-frame' and `image-show-frame' for getting
848 and setting the current frame of a multi-frame image.
850 *** You can change the speed of animated images.
852 ** Changes in encoding and decoding of text
855 *** New coding-system `prefer-utf-8'.
856 This is like `undecided' but prefers UTF-8 on decoding if the text to
857 be decoded does not contain any invalid UTF-8 sequences. On encoding,
858 any non-ASCII characters are automatically encoded as UTF-8.
861 *** New attributes of coding-systems whose type is `undecided'.
862 Two new attributes, `:inhibit-null-byte-detection' and
863 `:inhibit-iso-escape-detection', determine how to detect encoding of
864 text that includes null bytes and ISO-2022 escape sequences,
865 respectively. Each of these attributes can be either nil, zero, or
866 t. If it is t, decoding text ignores null bytes and, respectively,
867 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
868 with no-conversion and ISO-2022 sequences cause Emacs to assume the
869 text is encoded in one of the ISO-2022 encodings, such as
870 iso-2022-7bit. If the value is zero, Emacs consults the variables
871 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
873 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
874 UTF-8 encoding and decoding, whenever possible.
876 These attributes are only meaningful for coding-systems of type
877 `undecided'. (The type of a coding-system is determined by its
878 `:coding-type' attribute and can be accessed by calling the
879 `coding-system-type' function.)
881 ** The function `set-visited-file-modtime' now accepts a 0 or -1 argument
882 with the same interpretation as the returned value of `visited-file-modtime'.
884 ** time-to-seconds is not obsolete any more.
885 ** New functions special-form-p and macrop.
886 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
887 text-property on the first char.
889 ** The `defalias-fset-function' property lets you catch calls to defalias
890 and redirect them to your own function instead of `fset'.
892 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
893 When you edit DIR/FILE, Emacs normally creates a symbolic link
894 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
895 is being edited. Formerly, if there was already a non-symlink file
896 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
897 through DIR/.#FILE.9. These fallbacks have been removed, so that
898 Emacs now no longer locks DIR/FILE in that case.
900 On file systems that do not support symbolic links, the lock is now a
901 regular file with contents being what would have been in the symlink.
903 ** The 9th element returned by `file-attributes' is now unspecified.
904 Formerly, it was t if the file's gid would change if file were deleted
905 and recreated. This value has been inaccurate for years on many
906 platforms, and nobody seems to have noticed or cared.
908 ** The function `file-ownership-preserved-p' now has an optional
909 argument GROUP which causes it check for file group too. This can be
910 used in place of the 9th element of `file-attributes'.
912 ** New functions `group-gid' and `group-real-gid'.
914 ** The 6th argument to `copy-file' has been renamed to
915 `preserve-extended-attributes' as it now handles both SELinux context
918 ** The `common-substring' argument of display-completion-list is obsolete.
919 Either use `completion-all-completions' which already returns highlighted
920 strings (including for partial or substring completion) or call
921 `completion-hilit-commonality' to add the highlight.
923 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
925 *** The package descriptor and name of global variables, constants,
926 and functions should be separated by two hyphens if the symbol is not
927 meant to be used by other packages.
930 * Changes in Emacs 24.4 on Non-Free Operating Systems
932 ** The procedure for building Emacs on MS-Windows has changed.
933 It is now built by running the same configure script as on all other
934 platforms. This requires the MSYS environment and MinGW development
935 tools. See the updated instructions in nt/INSTALL for details.
937 Using the Posix configure script and Makefile's also means a change in
938 the directory structure of the Emacs installation on Windows. It is
939 now the same as on GNU and Unix systems. In particular, the auxiliary
940 programs, such as cmdproxy.exe and hexl.exe, are in
941 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
942 version), version-independent site-lisp is in share/emacs/site-lisp,
943 version-specific Lisp files are in share/emacs/VERSION/lisp and in
944 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
945 files are in share/emacs/VERSION/etc. (Emacs knows about all these
946 directories and will find the files in there automatically; there's no
947 need to set any variables due to this change.)
950 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
951 The backtrace is written to the 'emacs_backtrace.txt' file in the
952 directory where Emacs was running.
955 ** The variable `buffer-file-type' is no longer supported.
956 Setting it has no effect, and %t in the mode-line format is ignored.
957 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
958 modifying it has no effect.
961 ** Lock files now work on MS-Windows.
962 This allows to avoid losing your edits if the same file is being
963 edited in another Emacs session or by another user. See the node
964 "Interlocking" in the Emacs User Manual for the details. To disable
965 file locking, customize `create-lockfiles' to nil.
967 ** Improved fullscreen support on Mac OS X.
968 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
969 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
970 native is the default.
973 * Installation Changes in Emacs 24.3
975 ** The default X toolkit is now Gtk+ version 3.
976 If you don't pass `--with-x-toolkit' to configure, or if you use
977 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
978 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
979 You can explicitly require a specific version by passing
980 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
982 ** New configure option `--enable-link-time-optimization', to utilize
983 an appropriate feature provided by GCC since version 4.5.0.
985 ** New configure option `--without-all' to disable most of the optional
986 features (image support, etc.) that are normally enabled by default.
988 ** New configure option `--enable-gcc-warnings' (for developing/debugging
989 Emacs). If building with GCC, this enables compile-time checks that
990 warn/give errors about possibly-questionable C code. On a recent GNU
991 system there should be no warnings; on older and on non-GNU systems
992 the results may be useful to developers.
994 ** The configure option `--enable-use-lisp-union-type' has been
995 renamed to `--enable-check-lisp-object-type', as the resulting
996 Lisp_Object type no longer uses a union to implement the compile time
997 check that this option enables.
999 ** The configure option `--disable-maintainer-mode' has been removed,
1000 as it was confusingly-named and rarely useful.
1002 ** The configure options `--program-prefix', `--program-suffix', and
1003 `--program-transform-name' apply to more than just the installed
1004 binaries. Now they also affect the man pages, icons, and the
1005 etc/emacs.desktop file; but not the info pages, since this would break
1006 links between the various manuals.
1008 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1009 overwriting "emacs" in the installation bin/ directory with a link
1012 ** Emacs uses libtinfo in preference to libncurses, if available.
1014 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1015 /usr/pkg/lib to the linker search path. You must add them yourself if
1018 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1019 (from the bin and libexec directories, respectively). The former is
1020 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1023 * Startup Changes in Emacs 24.3
1025 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1026 lisp/ directory. There should not be any there anyway. If you have
1027 been adding them there, put them somewhere else; e.g., site-lisp.
1029 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1032 * Changes in Emacs 24.3
1036 *** `C-h f' (`describe-function') can now perform autoloading.
1037 When this command is called for an autoloaded function whose docstring
1038 contains a key substitution construct, that function's library is
1039 automatically loaded, so that the documentation can be shown
1040 correctly. To disable this, set `help-enable-auto-load' to nil.
1042 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1043 even after their associated libraries have been loaded (and the
1044 autoloads have been redefined as functions).
1048 *** Images displayed via ImageMagick now support transparency and the
1049 :background image specification property.
1051 *** When available, ImageMagick support is automatically enabled.
1052 It is no longer necessary to call `imagemagick-register-types'
1053 explicitly to install ImageMagick image types; that function is called
1054 automatically at startup, or when customizing an imagemagick- option.
1056 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1057 ImageMagick to view images. (You must call `imagemagick-register-types'
1058 afterwards if you do not use customize to change this.)
1060 *** The new variable `imagemagick-enabled-types' also affects which
1061 ImageMagick types are treated as images. The function
1062 `imagemagick-filter-types' returns the list of types that will be
1065 *** ImageMagick images now support the :max-width and :max-height
1068 *** Some data types aren't auto-detected by ImageMagick. Adding
1069 :format to `create-image' may help if the content type is in the
1070 new variable `image-format-suffixes'.
1074 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1075 next and previous path separator, respectively.
1077 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1078 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1079 non-nil before enabling the mode.
1083 *** New option `mode-line-default-help-echo' specifies the help text
1084 (shown in a tooltip or in the echo area) for any part of the mode line
1085 that does not have its own specialized help text.
1087 *** You can now click mouse-3 in the coding system indicator to invoke
1088 `set-buffer-file-coding-system'.
1090 ** Server and client
1092 *** emacsclient now obeys string values for `initial-buffer-choice',
1093 if it is told to open a new frame without specifying any file to visit
1094 or expression to evaluate.
1096 *** New option `server-auth-key' specifies a shared server key.
1098 ** Emacs now generates backtraces on fatal errors.
1099 On encountering a fatal error, Emacs now outputs a textual description
1100 of the fatal signal, and a short backtrace on platforms like glibc
1101 that support backtraces.
1103 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1104 This minor mode replaces `toggle-read-only', which is now obsolete.
1106 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1107 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1108 respectively, without exiting from the prompt.
1110 ** In the Package Menu, newly-available packages are listed as "new",
1111 and sorted above the other "available" packages by default.
1113 ** If your Emacs was built from a bzr checkout, the new variable
1114 `emacs-bzr-version' contains information about the bzr revision used.
1116 ** New option `create-lockfiles' specifies usage of lockfiles.
1117 It defaults to t. Changing it to nil inhibits the creation of lock
1118 files (use this with caution).
1120 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1121 variables on remote hosts.
1123 ** The entry for PCL-CVS has been removed from the Tools menu.
1124 The PCL-CVS commands are still available via the keyboard.
1126 ** Using "unibyte: t" in Lisp source files is obsolete.
1127 Use "coding: raw-text" instead.
1129 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1130 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1131 The previous binding, introduced in Emacs 24.1, was a mistake, because
1132 `C-c LETTER' bindings are reserved for user customizations.
1134 ** Internationalization
1136 *** New language environment: Persian.
1138 *** New input method `vietnamese-vni'.
1140 ** Nextstep (GNUstep / Mac OS X) port
1142 *** Support for fullscreen and the frame parameter fullscreen.
1144 *** A file dialog is used for open/save operations initiated from the
1148 * Editing Changes in Emacs 24.3
1150 ** Search and Replace
1152 *** Non-regexp Isearch now performs "lax" space matching.
1153 Each sequence of spaces in the supplied search string may match any
1154 sequence of one or more whitespace characters, as specified by the
1155 variable `search-whitespace-regexp'. (This variable is also used by a
1156 similar existing feature for regexp Isearch.)
1158 *** New Isearch command `M-s SPC' toggles lax space matching.
1159 This applies to both ordinary and regexp Isearch.
1161 *** New option `replace-lax-whitespace'.
1162 If non-nil, `query-replace' uses flexible whitespace matching too.
1165 *** Global `M-s _' starts a symbol (identifier) incremental search,
1166 and `M-s _' in Isearch toggles symbol search mode.
1167 `M-s c' in Isearch toggles search case-sensitivity.
1169 ** Navigation commands
1171 *** New binding `M-g c' for `goto-char'.
1173 *** New binding `M-g TAB' for `move-to-column'.
1175 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1176 interactively with no prefix arg. Previously, it moved to column 1.
1178 ** New option `yank-handled-properties' allows processing of text
1179 properties on yanked text, in ways that are more general than just
1180 removing them (as is done by `yank-excluded-properties').
1182 ** New option `delete-trailing-lines' specifies whether
1183 M-x delete-trailing-whitespace should delete trailing lines at the end
1184 of the buffer. It defaults to t.
1186 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1188 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1189 `ucs-insert' is now an obsolete alias for `insert-char'.
1191 ** The `z' key no longer has a binding in most special modes.
1192 It used to be bound to `kill-this-buffer', but `z' is too easy to
1195 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1196 It copies the region-rectangle as the last rectangle kill.
1200 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1202 *** New option `register-separator' specifies the register containing
1203 the text to put between collected texts for use with
1204 M-x append-to-register and M-x prepend-to-register.
1207 * Changes in Specialized Modes and Packages in Emacs 24.3
1209 ** Common Lisp emulation (CL)
1211 *** CL's main entry is now (require 'cl-lib).
1212 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1213 i.e., all its definitions have the "cl-" prefix (and internal definitions
1214 use the "cl--" prefix).
1216 If `cl' provided a feature under the name `foo', then `cl-lib'
1217 provides it under the name `cl-foo' instead; with the exceptions of the
1218 few `cl' definitions that had to use `foo*' to avoid conflicts with
1219 pre-existing Elisp entities. These have been renamed to `cl-foo'
1220 rather than `cl-foo*'.
1222 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1223 provide the old, non-prefixed names. Some exceptions are listed below:
1225 *** `cl-flet' is not like `flet' (which is deprecated).
1226 Instead it obeys the behavior of Common-Lisp's `flet'.
1227 In particular, in cl-flet function definitions are lexically scoped,
1228 whereas in flet the scoping is dynamic.
1230 *** `cl-labels' is slightly different from `labels'.
1231 The difference is that it relies on the `lexical-binding' machinery
1232 (as opposed to the `lexical-let' machinery used previously) to capture
1233 definitions in closures, so such closures will only work if `lexical-binding'
1236 *** `cl-letf' is not exactly like `letf'.
1237 The only difference is in details that relate to some deprecated usage
1238 of `symbol-function' in place forms.
1240 *** `progv' was rewritten to use the `let' machinery.
1241 A side effect is that variables without corresponding values are bound
1242 to nil rather than being made unbound.
1244 *** The following methods of extending `setf' are obsolete
1245 (use features from gv.el instead):
1246 `define-modify-macro' (use `gv-letplace')
1247 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1248 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1249 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1253 *** Changes are now highlighted using the same color scheme as in
1254 modern VCSes. Deletions are displayed in red (new faces
1255 `diff-refine-removed' and `smerge-refined-removed', and new definition
1256 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1257 and `smerge-refined-added', and new definition of `diff-added').
1259 *** The variable `diff-use-changed-face' defines whether to use the
1260 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1261 changes in context diffs.
1263 *** The new command `diff-delete-trailing-whitespace' removes trailing
1264 whitespace introduced by a diff.
1266 ** Ediff now uses the same color scheme as Diff mode.
1270 A new version of python.el, which provides several new features, including:
1271 per-buffer shells, better indentation, Python 3 support, and improved
1272 shell-interaction compatible with iPython (and virtually any other
1275 *** Some user options have been replaced/renamed, including (old -> new):
1276 **** python-indent -> python-indent-offset
1277 **** python-guess-indent -> python-indent-guess-indent-offset
1278 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1279 **** python-use-skeletons -> python-skeleton-autoinsert
1281 *** Some user options have been removed, including:
1283 **** `python-indent-string-contents': Strings are never indented.
1285 **** `python-honour-comment-indentation':
1286 Comments are always considered as indentation markers.
1288 **** `python-continuation-offset': Indentation is automatically
1289 calculated in a pep8 compliant way depending on the context.
1291 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1292 Have no direct mapping as the shell interaction is completely different.
1294 **** `python-python-command', `python-jython-command':
1295 Replaced by `python-shell-interpreter'.
1297 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1298 `python-pdbtrack-minor-mode-string', `python-source-modes':
1301 *** Some commands have been replaced (old -> new):
1302 **** python-insert-class -> python-skeleton-class
1303 **** python-insert-def -> python-skeleton-def
1304 **** python-insert-for -> python-skeleton-for
1305 **** python-insert-if -> python-skeleton-if
1306 **** python-insert-try/except -> python-skeleton-try
1307 **** python-insert-try/finally -> python-skeleton-try
1308 **** python-insert-while -> python-skeleton-while
1309 **** python-find-function -> python-nav-jump-to-defun
1310 **** python-next-statement -> python-nav-forward-sentence
1311 **** python-previous-statement -> python-nav-backward-sentence
1312 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1313 **** python-end-of-defun-function -> python-nav-end-of-defun
1314 **** python-send-buffer -> python-shell-send-buffer
1315 **** python-send-defun -> python-shell-send-defun
1316 **** python-send-region -> python-shell-send-region
1317 **** python-send-region-and-go -> emulate with python-shell-send-region
1318 and python-shell-switch-to-shell
1319 **** python-send-string -> python-shell-send-string
1320 **** python-switch-to-python -> python-shell-switch-to-shell
1321 **** python-describe-symbol -> python-eldoc-at-point
1325 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1327 *** The D-Bus object manager interface is implemented.
1329 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1330 if their value does not fit into Emacs's integer range.
1332 *** The function `dbus-call-method' is now non-blocking.
1333 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1335 *** Signals can also be sent as unicast messages.
1337 *** The argument list of `dbus-register-signal' has been extended,
1338 according to the new match rule types of D-Bus.
1340 *** `dbus-init-bus' supports private connections.
1342 *** There is a new function `dbus-setenv'.
1344 ** `desktop-path' no longer includes the "." directory.
1345 Desktop files are now located in ~/.emacs.d by default.
1349 *** `dired-do-async-shell-command' executes each file sequentially
1350 if the command ends in `;' (when operating on multiple files).
1351 Otherwise, it executes the command on each file in parallel.
1353 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1354 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1357 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1358 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1359 mark/unmark/flag all files in the active region.
1361 *** The minibuffer default for `=' (`dired-diff') has changed.
1362 It is now the backup file for the file at point, if one exists.
1363 In Transient Mark mode the default is the file at the active mark.
1365 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1366 The global binding for `M-=', `count-words-region' is in effect.
1370 *** New module "notifications", which can send a notification when you
1371 receive a private message or your nickname is mentioned.
1373 *** ERC will look up server/channel names via auth-source and use any
1376 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1377 only applies to messages sent by lurkers.
1379 ** reStructuredText mode
1381 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1382 fontification, comment handling, and customization have all been revised
1385 *** Support for `imenu' and `which-function-mode'.
1387 *** The reStructuredText syntax is more closely covered.
1388 Sphinx support has been improved.
1390 *** `rst-insert-list' inserts new list or continues existing lists.
1392 *** A negative prefix argument always works for `rst-adjust'.
1394 *** The window configuration is reset after displaying a TOC.
1396 *** The constant `rst-version' describes the rst.el package version.
1400 *** Support for percent literals and recognition of regular expressions
1401 in method calls without parentheses with more methods, including Cucumber
1404 *** Improved syntax highlighting and indentation.
1406 *** New command `ruby-toggle-block', bound to `C-c {'.
1408 *** Some non-standard keybindings/commands have been removed:
1410 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1412 **** `ruby-mark-defun'; use `mark-defun'.
1414 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1415 appropriate settings for the variables `beginning-of-defun-function'
1416 and `end-of-defun-function'.
1418 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1419 `reindent-then-newline-and-indent' and `newline' have been removed.
1421 ** Shell Script mode
1423 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1425 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1427 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1431 *** The free software compiler GHDL is supported (and now the default).
1433 *** Support for the VHDL-AMS packages has been added/updated.
1435 *** Updated to the 2002 revision of the VHDL standard.
1437 *** Accepts \r and \f as whitespace.
1441 *** The faces used by Apropos are now directly customizable.
1442 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1443 see the `apropos' Custom group for details.
1445 *** The old options whose values specified faces to use have been removed
1446 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1450 *** This package has been rewritten to use Tabulated List mode.
1452 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1453 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1457 *** Algebraic simplification mode is now the default.
1458 To restrict to the limited simplifications given by the former
1459 default simplification mode, use `m I'.
1463 *** You can customize the header text that appears above each calendar month.
1464 See the variable `calendar-month-header'.
1466 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1468 *** The calendars produced by cal-html include holidays.
1469 Customize `cal-html-holidays' to change this.
1473 *** The major modes from the parser generators "Bovine" and "Wisent"
1474 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1475 are in `auto-mode-alist', and the corresponding manuals are included.
1479 **** Menu support for the "Configuration" feature. This allows users to
1480 choose the active configuration (such as debug or install) from the menu.
1482 **** New command `ede-set' to interactively set project-local variables.
1484 **** Support for compiling, debugging, and running in "generic" projects.
1486 **** Autoconf editing support for M4 macros with complex arguments.
1488 **** Compilation support for the "linux" project type.
1490 **** "simple" projects have been removed; use "generic" projects instead.
1494 **** Support for parsing #include statements inside a namespace in C/C++.
1496 **** Improved support for 'extern "C"' declarations in C/C++.
1498 **** The ability to ignore more common special C/C++ preprocessor symbols,
1499 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1500 If available, include cdefs.h as an additional source of preprocessor symbols.
1502 **** Improved C/C++ function pointer parsing.
1504 **** In Python, support for converting imports to include file names.
1506 **** Ability to dynamically determine the Python load path.
1508 **** Support for the Python 'WITH' and 'AT' keywords.
1510 **** Improved tooltip completion.
1514 **** The SRecode manual is now included.
1516 **** Tag generation supports constructor/destructor settings and system
1517 include differentiation.
1519 **** Addition of 'Framework' support: Frameworks are specified when a
1520 particular kind of library (such as Android) is needed in a common language
1523 **** Support for nested templates and let variables override based on priority.
1525 **** Support for merging tables from multiple related modes, such as
1526 default -> c++ -> arduino.
1528 ** Compile has a new option `compilation-always-kill'.
1532 *** `custom-reset-button-menu' now defaults to t.
1534 *** Non-option variables are never matched in `customize-apropos' and
1535 `customize-apropos-options' (i.e., the prefix argument does nothing for
1536 these commands now).
1540 *** The variables `term-default-fg-color' and `term-default-bg-color'
1541 are now deprecated in favor of the customizable face `term'.
1543 *** You can customize how to display ANSI terminal colors and styles
1544 by customizing the corresponding `term-color-<COLOR>',
1545 `term-color-underline' and `term-color-bold' faces.
1549 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1551 *** Remote processes are now also supported on remote MS-Windows hosts.
1555 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1556 Previously, this slot stored semicolon-separated attribute-value pairs
1557 appended to some imap URLs, but this is not compatible with RFC 3986.
1558 So now the `filename' slot stores the entire path and query components,
1559 and the `attributes' slot is always nil.
1561 *** New function `url-encode-url' for encoding a URI string.
1562 The `url-retrieve' function now uses this to encode its URL argument,
1563 in case that is not properly encoded.
1565 *** New command `url-cookie-list' displays all the current cookies, and
1566 allows deleting selected cookies.
1568 ** notifications.el supports now version 1.2 of the Notifications API.
1569 The function `notifications-get-capabilities' returns the supported
1572 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1573 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1574 `flymake-warning-bitmap'.
1576 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1577 specifying URL types that should be converted to remote file names at
1578 the FFAP prompt. The default is now '("ftp").
1580 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1581 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1583 ** New option `mouse-avoidance-banish-position' specifies where the
1584 `banish' mouse avoidance setting moves the mouse.
1586 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1587 closing brackets to be aligned with the line of the opening bracket.
1589 ** In Proced mode, new command `proced-renice' renices marked processes.
1591 ** New option `async-shell-command-buffer' specifies the buffer to use
1592 for a new asynchronous `shell-command' when the default output buffer
1593 `*Async Shell Command*' is already in use.
1595 ** SQL mode has a new option `sql-db2-escape-newlines'.
1596 If non-nil, newlines sent to the command interpreter will be escaped
1597 by a backslash. The default does not escape the newlines and assumes
1598 that the sql statement will be terminated by a semicolon.
1600 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1601 (and modes that derive from it), sorts the column at point, or the Nth
1602 column if a numeric prefix argument is given.
1604 ** `which-func-modes' now defaults to t, so Which Function mode, when
1605 enabled, applies to all applicable major modes.
1607 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1610 ** Follow mode no longer works by using advice.
1611 The option `follow-intercept-processes' has been removed.
1613 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1615 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1616 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1617 *** semantic-change-hooks -> semantic-change-functions
1618 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1619 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1620 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1621 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1622 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1623 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1624 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1625 *** rcirc-activity-hooks -> rcirc-activity-functions
1626 *** rcirc-print-hooks -> rcirc-print-functions
1627 *** dbus-event-error-hooks -> dbus-event-error-functions
1628 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1629 *** checkdoc-style-hooks -> checkdoc-style-functions
1630 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1631 *** archive-extract-hooks -> archive-extract-hook
1632 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1633 *** hfy-post-html-hooks -> hfy-post-html-hook
1634 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1635 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1636 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1637 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1639 ** Obsolete packages
1642 In most cases, assoc+member+push+delq work just as well.
1643 And in any case it's just a terrible package: ugly semantics, terrible
1644 inefficiency, and not namespace-clean.
1653 * Incompatible Lisp Changes in Emacs 24.3
1655 ** Docstrings starting with `*' no longer indicate user options.
1656 Only variables defined using `defcustom' are considered user options.
1657 The function `user-variable-p' is now an obsolete alias for
1658 `custom-variable-p'.
1660 ** The return values of `defalias', `defun' and `defmacro' have changed,
1661 and are now undefined. For backwards compatibility, `defun' and
1662 `defmacro' currently return the name of the newly defined
1663 function/macro, but this should not be relied upon.
1665 ** `random' by default now returns a different random sequence in
1666 every Emacs run. Use `(random S)', where S is a string, to set the
1667 random seed to a value based on S, in order to get a repeatable
1668 sequence in later calls.
1670 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1671 that substring is inserted literally even if the LITERAL arg is
1672 non-nil, instead of causing an error to be signaled.
1674 ** `select-window' now always makes the window's buffer current.
1675 It does so even if the window was selected before.
1677 ** The function `x-select-font' can return a font spec, instead of a
1678 font name as a string. Whether it returns a font spec or a font name
1679 depends on the graphical library.
1681 ** `face-spec-set' no longer sets frame-specific attributes when the
1682 third argument is a frame (that usage was obsolete since Emacs 22.2).
1684 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1686 ** The CL package's `get-setf-method' function no longer exists.
1687 Generalized variables are now part of core Emacs Lisp, and implemented
1688 differently to the way cl.el used to do it. It is not possible to
1689 define a compatible replacement for `get-setf-method'. See the file
1690 gv.el for internal details of the new implementation.
1692 ** The arguments of `dbus-register-signal' are no longer just strings,
1693 but keywords or keyword-string pairs. The old argument list will
1694 still be supported for Emacs 24.x.
1696 ** Miscellaneous name changes
1697 Some Lisp symbols have been renamed to correct their spelling,
1698 or to be more consistent with standard Emacs terminology.
1700 *** Renamed functions
1701 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1702 **** inactivate-input-method -> deactivate-input-method
1703 **** quail-inactivate -> quail-deactivate
1704 **** robin-inactivate -> robin-deactivate
1705 **** viper-inactivate-input-method -> viper-deactivate-input-method
1706 **** viper-inactivate-input-method-action ->
1707 viper-deactivate-input-method-action
1708 **** ucs-input-inactivate -> ucs-input-deactivate
1711 The old hooks are still supported for backward compatibility, but they
1712 are deprecated and will be removed eventually.
1713 **** input-method-inactivate-hook -> input-method-deactivate-hook
1714 **** robin-inactivate-hook -> robin-deactivate-hook
1715 **** quail-inactivate-hook -> quail-deactivate-hook
1717 *** Renamed variables
1718 **** follow-deactive-menu -> follow-inactive-menu
1719 **** inactivate-current-input-method-function ->
1720 deactivate-current-input-method-function
1722 ** Some obsolete functions, variables, and faces have been removed:
1723 *** `last-input-char', `last-command-char', `unread-command-char'
1724 *** `facemenu-unlisted-faces'
1725 *** `rmail-decode-mime-charset'
1726 *** `iswitchb-read-buffer'
1727 *** `sc-version', `sc-submit-bug-report'
1728 *** `set-char-table-default'
1729 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1730 *** `compile-internal'
1732 *** `mode-line-inverse-video'
1733 *** `follow-mode-off-hook'
1734 *** `cvs-commit-buffer-require-final-newline'
1735 (use `log-edit-require-final-newline' instead)
1736 *** `cvs-changelog-full-paragraphs'
1737 (use `log-edit-changelog-full-paragraphs' instead)
1738 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1739 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1740 *** `vc-master-templates' (use `vc-handled-backends' instead)
1741 *** `vc-checkout-carefully'
1744 * Lisp Changes in Emacs 24.3
1746 ** CL-style generalized variables are now in core Elisp.
1747 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1748 You can define your own generalized variables using `gv-define-simple-setter',
1749 `gv-define-setter', etc.
1751 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1752 This can significantly speed up execution of non-byte-compiled code,
1753 but can also bump into previously unnoticed cyclic dependencies.
1754 These are generally harmless: they will simply cause the macro calls
1755 to be left for later expansion (as before), but will result in a
1756 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1757 You may wish to restructure your code so this does not happen.
1759 ** New sampling-based Elisp profiler.
1760 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1761 When finished, use M-x profiler-stop. The sampling rate can be based on
1762 CPU time or memory allocations.
1764 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1765 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1767 ** New macros `setq-local' and `defvar-local'.
1769 ** Face underlining can now use a wave.
1771 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1772 of `read-regexp' accepts a string ending with a colon and space, and its
1773 second argument DEFAULTS can be a list of strings accessible via `M-n'
1774 in the minibuffer ahead of other hard-coded useful regexp-related values.
1775 More commands use `read-regexp' now to read their regexp arguments.
1779 *** New function `completion-table-with-quoting' to handle completion
1780 in the presence of quoting, such as file completion in shell buffers.
1782 *** New function `completion-table-subvert' to use an existing completion
1783 table, but with a different prefix.
1787 *** New error type and new function `user-error'.
1788 These do not trigger the debugger.
1790 *** New option `debugger-bury-or-kill', saying what to do with the
1791 debugger buffer when exiting debug.
1793 *** Set `debug-on-message' to enter the debugger when a certain
1794 message is displayed in the echo area. This can be useful when trying
1795 to work out which code is doing something.
1797 *** New var `inhibit-debugger', automatically set to prevent accidental
1798 recursive invocations.
1802 *** New command `fit-frame-to-buffer' adjusts the frame height to
1805 *** The command `fit-window-to-buffer' can adjust the frame height
1806 if the new option `fit-frame-to-buffer' is non-nil.
1808 *** New macro `with-temp-buffer-window', similar to
1809 `with-output-to-temp-buffer'.
1811 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1814 *** New option `switch-to-buffer-preserve-window-point' to restore a
1815 window's point when switching buffers.
1817 *** New display action alist entry `no-display-ok' to indicate the
1818 caller of `display-buffer' is ready to handle the case of not
1819 displaying the buffer.
1821 *** New display action alist entries `window-height' and `window-width'
1822 specify the size of new windows created by `display-buffer'.
1824 *** New display action alist entry `pop-up-frame-parameters', if
1825 non-nil, specifies frame parameters to give any newly-created frame.
1827 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1828 tells display action functions to avoid changing which frame is
1831 *** New display action alist entry `previous-window', if non-nil,
1832 specifies window to reuse in `display-buffer-in-previous-window'.
1834 *** New display action functions `display-buffer-below-selected',
1835 and `display-buffer-in-previous-window'.
1837 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1838 now accept a third argument to avoid choosing the selected window.
1840 *** Additional values recognized for option `window-combination-limit'.
1842 *** The following variables are obsolete, as they can be replaced by
1843 appropriate entries in the `display-buffer-alist' function introduced
1845 **** `dired-shrink-to-fit'
1846 **** `display-buffer-reuse-frames'
1847 **** `display-buffer-function'
1848 **** `special-display-buffer-names'
1849 **** `special-display-frame-alist'
1850 **** `special-display-function'
1851 **** `special-display-regexps'
1855 *** `current-time-string' no longer requires that its argument's year
1856 must be in the range 1000..9999. It now works with any year supported
1857 by the underlying C implementation.
1859 *** `current-time' now returns extended-format time stamps
1860 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1861 PSEC is typically a multiple of 1000 on current machines. Other
1862 functions that use this format, such as `file-attributes' and
1863 `format-time-string', have been changed accordingly. Old-format time
1864 stamps are still accepted.
1866 *** The format of timers in `timer-list' and `timer-idle-list' is now
1867 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1868 The PSECS slot is new, and uses picosecond resolution. It can be
1869 accessed via the new `timer--psecs' accessor.
1871 *** Last-modified time stamps in undo lists now are of the form
1872 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1876 *** Improved security when handling persistent objects:
1878 **** `eieio-persistent-read' now features optional arguments for specifying
1879 the class to load, as well as a flag stating whether subclasses are allowed;
1880 if provided, other classes will be rejected by the reader. For
1881 compatibility with existing code, if the class is omitted only a
1884 **** New specialized reader for pulling in classes and signaling errors
1885 without evaluation of suspicious code.
1887 **** All slots that contain objects must have a :type. Slots with lists
1888 of objects must use a new type predicate for a list of an object type.
1890 *** Support for `find-function' and similar utilities, through the addition
1891 of filename support to generated symbols.
1893 ** Floating point functions now always return special values like NaN,
1894 instead of signaling errors, if given invalid args; e.g., (log -1.0).
1895 Previously, they returned NaNs on some platforms but signaled errors
1896 on others. The affected functions are acos, asin, tan, exp, expt,
1897 log, log10, sqrt, and mod.
1899 ** New fringe bitmap `exclamation-mark'.
1901 ** Miscellaneous changes to special forms and macros
1903 *** `defun' and `defmacro' are now macros rather than special forms.
1905 *** `kbd' is now a function rather than a macro.
1907 ** Miscellaneous new functions
1909 *** `set-temporary-overlay-map' sets up a temporary keymap that
1910 takes precedence over most other maps for a short while (normally one key).
1912 *** `autoloadp' tests if its argument is an autoloaded object.
1914 *** `autoload-do-load' performs the autoloading operation.
1916 *** `buffer-narrowed-p' tests if the buffer is narrowed.
1918 *** `file-name-base' returns a file name sans directory and extension.
1920 *** `function-get' fetches a function property, following aliases.
1922 *** `posnp' tests if an object is a `posn'.
1924 *** `system-users' returns the user names on the system.
1926 *** `system-groups' returns the group names on the system.
1928 *** `tty-top-frame' returns the topmost frame of a text terminal.
1930 ** The following functions and variables are obsolete:
1931 *** `automount-dir-prefix' (use `directory-abbrev-alist')
1932 *** `buffer-has-markers-at'
1933 *** `macro-declaration-function' (use `macro-declarations-alist')
1934 *** `window-system-version' (provides no useful information)
1935 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
1936 *** `query-replace-interactive'
1937 *** `font-list-limit' (has had no effect since Emacs < 23)
1940 * Changes in Emacs 24.3 on Non-Free Operating Systems
1942 ** Cygwin builds can use the native MS Windows user interface.
1943 Pass `--with-w32' to configure. The default remains the X11 interface.
1945 ** Two new functions are available in Cygwin builds:
1946 `cygwin-convert-file-name-from-windows' and
1947 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
1948 code to access the Cygwin file-name mapping machinery to convert
1949 between Cygwin and Windows-native file and directory names.
1951 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
1952 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
1953 `mouse-autoselect-window'.
1955 ** On MS Windows Vista and later Emacs now supports symbolic links.
1957 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
1958 support for libxml2, even if its presence is detected.
1960 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1962 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
1963 directories to the search path. You must add them yourself if you want them.
1966 * Changes in Emacs 24.2
1968 ** This is mainly a bug-fix release.
1971 * Installation Changes in Emacs 24.1
1973 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1974 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1975 also depend on Gtk+. You can disable them with --without-rsvg and
1978 ** Emacs can be compiled with GnuTLS support.
1979 This happens by default if a suitably recent version of the library is
1980 found at build time. To prevent this, use the configure option
1981 `--without-gnutls'. See below for GnuTLS features.
1983 ** Emacs can be compiled with SELinux support.
1984 This happens by default if a suitably recent version of the library is
1985 found at build time. To prevent this, use the configure option
1986 `--without-selinux'. See below for SELinux features.
1988 ** Emacs can be compiled with ImageMagick support.
1989 This happens by default if a suitably recent version of the library is
1990 found at build time. To prevent this, use the configure option
1991 `--without-imagemagick'. See below for ImageMagick features.
1992 This feature is not available for the Nextstep or MS ports.
1994 ** Emacs can be compiled with libxml2 support.
1995 This happens by default if a suitably recent version of the library is
1996 found at build time. To prevent this, use the configure option
1997 `--without-xml2'. See below for libxml2 features.
1999 ** By default, the installed Info and man pages are compressed.
2000 You can disable this by configuring --without-compress-info.
2002 ** New configure option --with-wide-int.
2003 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2004 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2007 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2008 These provide no new functionality, they just remove the need to edit
2009 lib-src/Makefile by hand in order to use the associated features.
2011 ** New configure option --enable-use-lisp-union-type.
2012 This is only useful for Emacs developers to debug certain types of bugs.
2013 This is not a new feature; only the configure flag is new.
2015 ** The standalone programs digest-doc and sorted-doc are removed.
2016 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2018 ** The standalone program `fakemail' is removed.
2019 If you need it, feedmail.el provides a superset of the functionality.
2022 * Startup Changes in Emacs 24.1
2024 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2025 command line arguments, and the EMACS_UNIBYTE environment variable, no
2026 longer have any effect. (They were declared obsolete in Emacs 23.)
2028 ** New command line option `--no-site-lisp' removes site-lisp directories
2029 from load-path. -Q now implies this. This option does not affect the
2030 EMACSLOADPATH environment variable (and hence has no effect for
2034 * Changes in Emacs 24.1
2038 *** Many packages now use the `completion-at-point' command,
2039 rather than implementing separate completion commands.
2041 *** `completion-at-point' now handles tags and semantic completion.
2043 *** Completion in a non-minibuffer now tries to detect the end of completion
2044 and pops down the *Completions* buffer accordingly.
2046 *** New option `completion-cycle-threshold' allows completion cycling.
2048 *** New option `completion-category-overrides' for overriding the
2049 default completion style in certain circumstances.
2051 *** New completion style `substring'.
2053 *** Completion of buffer names uses `substring' completion by default.
2055 *** The option `widget-complete-field' has been removed.
2059 *** The first time you try sending mail, Emacs asks for a mail method.
2060 This is implemented by a new default for `send-mail-function', which
2061 is `sendmail-query-once'. This offers to use the smtpmail package, or
2062 to use the old defaults relying on external mail facilities
2063 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2064 `mailclient-send-it' on Windows).
2066 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2067 transfers the report to your desktop's preferred mail client, if there
2068 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2071 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2072 and Mail mode changes
2074 ** Emacs server and client changes
2076 *** New option `server-port' specifies the port for TCP Emacs servers.
2078 *** New emacsclient argument -q/--quiet suppresses some status messages.
2080 *** New emacsclient argument --frame-parameters specifies the frame
2081 parameters of any newly-created graphical frame.
2083 *** If emacsclient shuts down due to Emacs signaling an error,
2084 its exit status is 1.
2086 *** New emacsclient argument --parent-id ID.
2087 This opens a client frame in parent X window ID, via XEmbed, similar
2088 to the --parent-id argument to Emacs.
2090 ** Internationalization changes
2092 *** Emacs now supports display and editing of bidirectional text.
2093 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2094 displayed in the correct visual order as expected by users of those
2095 scripts. The display reordering is a "full bidirectionality" class
2096 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2097 with no RTL text should look exactly the same as before.
2099 **** New buffer-local variable `bidi-display-reordering'.
2100 To disable display reordering in a buffer, change this to nil.
2102 **** New buffer-local variable `bidi-paragraph-direction'.
2103 If nil (the default), Emacs determines the base direction of each
2104 paragraph from its text, as specified by the UBA. Setting the value
2105 to `right-to-left' or `left-to-right' forces a base direction on each
2108 Paragraphs with right-to-left base direction are displayed starting at
2109 the right window edge.
2111 *** Enhanced support for characters with no glyphs in available fonts,
2112 or, on text terminals, characters that cannot be encoded by the
2113 terminal coding system. The new option `glyphless-char-display-control'
2114 specifies how to display them: as a hexadecimal code in a box, a thin
2115 1-pixel space, an empty box, etc.
2117 *** New input methods for Farsi and Bulgarian
2118 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2120 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2121 (U+2010 and U+2011).
2123 *** New Hebrew translation of the Emacs Tutorial.
2124 Type `C-u C-h t' to choose it in case your language setup doesn't
2125 automatically select it.
2127 ** An Emacs Lisp package manager is now included.
2128 This is a convenient way to download and install additional packages,
2129 from a package repository at http://elpa.gnu.org.
2131 *** M-x list-packages shows a list of packages, which can be
2132 selected for installation.
2134 *** New command `describe-package', bound to `C-h P'.
2136 *** By default, all installed packages are loaded automatically when
2137 Emacs starts up. To disable this, set `package-enable-at-startup' to
2138 nil. To specify the packages to load, customize `package-load-list'.
2140 ** Custom theme changes
2142 *** New command `M-x customize-themes', which provides a convenient
2143 interface for enabling and disabling Custom themes.
2145 *** New option `custom-theme-load-path' is the load path for themes.
2146 Emacs no longer looks for Custom themes in `load-path'. The default
2147 value of `custom-theme-load-path' says to look for themes in
2148 `custom-theme-directory', followed by a subdirectory of
2149 `data-directory' named "themes/", which contains a small selection of
2150 built-in Custom themes.
2152 *** New option `custom-safe-themes' records known-safe theme files.
2153 If a theme is not in this list, Emacs queries before loading it, and
2154 offers to save the theme to `custom-safe-themes' automatically. By
2155 default, all themes included in Emacs are treated as safe.
2157 ** Improved GTK integration
2159 *** GTK scroll-bars are now placed on the right by default.
2160 The function `set-scroll-bar-mode' can change this.
2162 *** GTK tool bars can have just text, just images or images and text.
2163 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2164 the default is taken from desktop settings.
2166 *** GTK tool bars can be placed on any edge of the frame.
2167 The frame-parameter tool-bar-position controls this. It takes the
2168 values top, left, right or bottom. The Options => Show/Hide menu has
2171 *** The default colors for selected text (the `region' face) are taken
2172 from the GTK theme when Emacs is built with GTK.
2174 *** Emacs uses GTK tooltips by default if built with GTK.
2175 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2177 ** Graphical interface changes
2179 *** On graphical displays, the mode-line no longer ends in dashes.
2180 Also, the first dash (which does not indicate anything) is just
2181 displayed as a space.
2183 *** `menu-bar-select-buffer-function' lets you choose another operation
2184 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2186 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2187 built with Xft. These fonts can be set via X resources, for example:
2188 Emacs.pane.menubar.font: Courier-12
2192 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2193 or if it receives a SIGINT signal in batch mode.
2195 *** `kill-emacs-hook' is now also run in batch mode.
2196 Third-party code which adds to `kill-emacs-hook' should check if they
2197 do the right thing in batch mode.
2199 ** Scrolling changes
2201 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2202 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2203 of buffer at first key-press (instead they move to top/bottom of buffer)
2204 when `scroll-error-top-bottom' is non-nil.
2206 *** New option `scroll-error-top-bottom' (see above).
2208 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2209 scroll a line instead of full screen.
2211 *** New property `scroll-command' should be set on a command's symbol to
2212 define it as a scroll command affected by `scroll-preserve-screen-position'.
2214 *** If you customize `scroll-conservatively' to a value greater than 100,
2215 Emacs will never recenter point in the window when it scrolls due to
2216 cursor motion commands or commands that move point (e.f., `M-g M-g').
2217 Previously, you needed to use `most-positive-fixnum' as the value of
2218 `scroll-conservatively' to achieve the same effect.
2220 *** "Aggressive" scrolling now honors the scroll margins.
2221 If you customize `scroll-up-aggressively' or
2222 `scroll-down-aggressively' and move point off the window, Emacs now
2223 scrolls the window so as to avoid positioning point inside the scroll
2226 ** Basic SELinux support has been added.
2227 This requires Emacs to be linked with libselinux at build time.
2229 *** Emacs preserves the SELinux file context when backing up.
2230 Also, the function `copy-file' has an extra optional argument for
2231 preserving SELinux context, and the return value of `backup-buffer'
2232 now includes the SELinux context.
2234 *** New functions `file-selinux-context' and `set-file-selinux-context'
2235 get and set the SELinux context of a file.
2239 *** `delete-by-moving-to-trash' now only affects commands that specify
2240 trashing. This avoids inadvertently trashing temporary files.
2242 *** Calling `delete-file' or `delete-directory' with a prefix argument
2243 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2245 ** File- and directory-local variable changes
2247 *** You can stop directory local vars from applying to subdirectories.
2248 Add an element (subdirs . nil) to the alist portion of any variables
2249 settings to indicate that the section should not apply to
2252 *** Directory local variables can apply to some file-less buffers.
2253 Affected modes include dired, vc-dir, and log-edit. For example,
2254 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2255 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2256 `hack-dir-local-variables-non-file-buffer' to support this.
2258 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2259 Instead, use "eval: (minor-mode 1)".
2261 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2262 to `inhibit-local-variables-regexps'. As the name suggests, it now
2263 applies to ALL file local variables, not just -*- lines. The
2264 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2269 *** The `quit-window' command now restores the last buffer displayed
2270 in the quitted window.
2272 *** Resizing an Emacs frame now preserves proportional window sizes,
2273 modulo restrictions like window minimum sizes and fixed-size windows.
2275 *** The behavior of `display-buffer' is now customizable in detail.
2277 **** New option `display-buffer-base-action' specifies a list of
2278 user-determined display "actions" (functions and optional arguments
2279 for choosing the displaying window).
2281 This takes precedence over the default display action, which is
2282 specified by `display-buffer-fallback-action'.
2284 **** New option `display-buffer-alist' maps buffer name regexps to
2285 display actions, taking precedence over `display-buffer-base-action'.
2287 *** New option `window-combination-limit'.
2288 The new option `window-combination-limit' allows to return the space
2289 obtained for resizing or creating a window more reliably to the window
2290 from which such space was obtained.
2292 *** New option `window-combination-resize'.
2293 The new option `window-combination-resize' allows to split a window that
2294 otherwise cannot be split because it's too small by stealing space from
2295 other windows in the same combination. Subsequent resizing or deletion
2296 of the window will resize all windows in the same combination as well.
2298 *** New option `frame-auto-hide-function' lets you choose between
2299 iconifying or deleting a frame when burying a buffer in a dedicated
2300 frame, or quitting a window showing a buffer in a frame of its own.
2302 *** New commands `maximize-window' and `minimize-window'.
2303 These maximize and minimize the size of a window within its frame.
2305 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2306 These functions allow to navigate through the live buffers that have
2307 been shown in a specific window.
2309 ** Minibuffer changes
2311 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2312 This is handy for minibuffer-only frames, and is also used for the feature
2313 where mouse-1 pops up *Messages*"', which can now easily be changed.
2315 *** Minibuffers set `truncate-lines' to nil.
2316 If you want to change the value to something else, you could use
2317 for example `minibuffer-setup-hook'.
2319 ** `auto-mode-case-fold' is now enabled by default.
2321 ** `backup-by-copying-when-mismatch' now defaults to t.
2323 ** New basic faces `error', `warning', `success'.
2324 These are used to highlight text indicating failure, caution or
2325 successful operation.
2327 ** New option `list-colors-sort' defines the color sort order
2328 for `list-colors-display'.
2330 ** The variable `focus-follows-mouse' now always defaults to nil.
2333 * Editing Changes in Emacs 24.1
2337 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2338 `isearch-yank-line'.
2340 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2341 `isearch-yank-kill'.
2343 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2345 ** New commands `count-words-region' and `count-words'.
2347 *** M-= is bound to `count-words-region', not `count-lines-region'.
2348 The `count-words-region' command, when called interactively, reports
2349 the number of lines, words, and characters in the region. It is a
2350 superset of the old `count-lines-region', which is now an obsolete
2353 ** The command `just-one-space' (M-SPC), if given a negative argument,
2354 also deletes newlines around point.
2358 *** New option `delete-active-region'.
2359 If non-nil, [delete] and DEL delete the region if it is active and no
2360 prefix argument is given. If set to `kill', those commands kill
2363 *** New command `delete-forward-char', bound to [delete].
2364 This is meant for interactive use, and obeys `delete-active-region'.
2365 The command `delete-char' does not obey `delete-active-region'.
2367 *** `delete-backward-char' is now a Lisp function.
2368 Apart from obeying `delete-active-region', its behavior is unchanged.
2369 However, the byte compiler now warns if it is called from Lisp; Lisp
2370 callers should use delete-char with a negative argument instead.
2372 *** The option `mouse-region-delete-keys' has been deleted.
2374 ** Selection changes.
2376 The default handling of clipboard and primary selections has been
2377 changed to conform with modern X applications. In short, most
2378 commands for killing and yanking text now use the clipboard, while
2379 mouse commands use the primary selection.
2381 In the following, we provide a list of these changes, followed by a
2382 list of steps to get the old behavior back if you prefer that.
2384 *** `select-active-regions' now defaults to t.
2385 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2386 the kill ring. The selected text is put in the primary selection, if
2387 the system possesses a separate primary selection facility (e.g. X).
2389 **** `select-active-regions' also accepts a new value, `only'.
2390 This means to only set the primary selection for temporarily active
2391 regions (usually made by mouse-dragging or shift-selection);
2392 "ordinary" active regions, such as those made with C-SPC followed by
2393 point motion, do not alter the primary selection.
2395 **** `mouse-drag-copy-region' now defaults to nil.
2397 *** mouse-2 is now bound to `mouse-yank-primary'.
2398 This pastes from the primary selection, ignoring the kill-ring.
2399 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2401 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2403 *** `x-select-enable-primary' now defaults to nil.
2404 Thus, commands that kill text or copy it to the kill-ring (such as
2405 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2407 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2408 exactly equivalent to M-w, C-w, and C-y respectively.
2410 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2411 non-nil by default, as Windows does not support the primary selection
2412 between applications.
2414 *** To return to the previous behavior, do the following:
2416 **** Change `select-active-regions' to nil.
2417 **** Change `mouse-drag-copy-region' to t.
2418 **** Change `x-select-enable-primary' to t (on X only).
2419 **** Change `x-select-enable-clipboard' to nil.
2420 **** Bind `mouse-yank-at-click' to mouse-2.
2422 *** Support for X cut buffers has been removed.
2424 *** X clipboard managers are now supported.
2425 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2427 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2428 in the current rectangle. With a prefix argument, this prompts for a
2429 number to count from and for a format string.
2431 ** `redisplay-dont-pause' now defaults to t.
2432 This makes Emacs feel more responsive to editing commands that arrive
2433 at high rate, e.g. if you lean on some key, because stopping redisplay
2434 in the middle (when this variable is nil) forces more expensive
2435 updates later on, and Emacs appears to be unable to keep up.
2437 ** The behavior of <TAB> for active regions in Text mode has changed.
2438 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2439 when the region is active causes Emacs to indent all the lines in the
2440 region, aligning them with the line previous to the first line in the
2441 region (or with the left margin if there is no previous line).
2443 ** When `occur' is called with a prefix argument, matching strings are
2444 collected into the `*Occur*' buffer without line numbers. If there
2445 are parenthesized subexpressions in the specified regexp, `occur'
2446 reads replacement text that may contain \\& and \\N whose convention
2447 follows `replace-match'.
2450 * Changes in Specialized Modes and Packages in Emacs 24.1
2452 ** Archive Mode has basic support for browsing and updating 7z archives.
2456 *** BibTeX mode now supports biblatex.
2457 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2458 `bibtex-entry-field-alist' is now an obsolete alias for
2459 `bibtex-BibTeX-entry-alist'.
2461 *** New command `bibtex-search-entries', bound to C-c C-a.
2463 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2465 *** New variable `bibtex-search-entry-globally'.
2469 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2471 *** The default browser used by the package is now the "xdg-open" program,
2472 on platforms that support it. This calls your desktop's preferred browser.
2476 *** Support for musical notes.
2478 *** Support for logarithmic units.
2480 *** No longer uses the tex prefix for TeX specific unit names when
2481 using TeX or LaTeX mode.
2483 *** New option to highlight selections using faces.
2485 *** `calc-histogram' has the option of using a vector to determine the bins.
2487 *** New "O" option prefix.
2489 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2491 ** Calendar, Diary, and Appt
2493 *** Diary entries can contain non-printing "comments".
2494 See the variable `diary-comment-start'.
2496 *** Appointments can specify their individual warning times.
2497 See the variable `appt-warning-time-regexp'.
2499 *** The function specified by `appt-disp-window-function' may be passed
2500 lists of arguments if multiple appointments are due at similar times.
2501 If you are using a custom function for this, you should update it.
2503 *** New function `diary-hebrew-birthday'.
2505 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2506 may no longer be nil, but must all be strings.
2508 *** The obsolete (since Emacs 22.1) method of enabling the appt
2509 package by adding `appt-make-list' to `diary-hook' has been removed.
2510 Use `appt-activate' instead.
2512 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2513 appt-issue-message (use the function appt-activate)
2514 appt-visible/appt-msg-window (use the variable appt-display-format)
2516 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2517 view-diary-entries, list-diary-entries, show-all-diary-entries
2521 *** New feature to "guess" the style in an existing buffer.
2522 The main entry point is M-x c-guess.
2524 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2526 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2527 Thus C-M-a will, by default, go to the beginning of the immediate function,
2530 *** "Macros with semicolons" can be registered for correct indentation.
2531 Where such a macro ends a line (no semicolon) the next statement is no longer
2532 parsed as a statement continuation.
2534 ** Comint and modes derived from it use the standard completion code.
2538 *** Compilation mode can be used without Font Lock mode.
2539 `compilation-parse-errors-function' is now obsolete.
2541 *** New variable `compilation-filter-start', which is bound while
2542 `compilation-filter-hook' runs. It records the start position of the
2543 text inserted by `compilation-filter'.
2545 *** `compilation-error-screen-columns' and `compilation-first-column'
2546 are obeyed in the editing buffer. So programming language modes can
2547 set them, whereas previously only the value in the *Compilation*
2552 *** Customize buffers now contain a search field.
2553 The search is performed using `customize-apropos'.
2554 To turn off the search field, set `custom-search-field' to nil.
2556 *** Options in customize group buffers start out hidden if not customized.
2557 Use the arrow to the left of the option name to toggle visibility.
2559 *** custom-buffer-sort-alphabetically now defaults to t.
2561 *** The color widget now has a "Choose" button, which allows you to
2562 choose a color via `list-colors-display'.
2566 *** It is now possible to access buses other than the default system
2569 *** The `dbus-register-method' and `dbus-register-property' functions
2570 optionally do not register names.
2572 *** The new function `dbus-register-service' registers a known service
2573 name on a D-Bus without also registering a property or a method.
2577 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2578 if called with a prefix argument, read a file name from the minibuffer
2579 instead of using the current buffer.
2581 *** The "dired local variables" feature of Dired-x is obsolete.
2582 The standard directory local variables feature replaces it.
2586 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2587 controlling attempts to autojoin a channel.
2589 *** New variable `erc-coding-system-precedence': If we use `undecided'
2590 as the server coding system, this variable will then be consulted.
2591 The default is to decode strings that can be decoded as utf-8 as
2592 utf-8, and do the normal `undecided' decoding for the rest.
2596 *** The default value of `eshell-directory-name' has changed
2597 to be an "eshell" directory in `user-emacs-directory'.
2598 The old "~/.eshell/" directory is still used if it exists, though.
2602 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2603 It now supports multithread non-stop debugging and simultaneous
2604 debugging of several threads.
2608 *** RET (`image-toggle-animation') toggles animation, if applicable.
2609 Animation plays once, unless the option `image-animate-loop' is non-nil.
2613 *** New command M-x info-display-manual displays a named Info manual.
2614 If that manual is already visited in some Info buffer, it displays
2615 that buffer. (This is handy if you have many manuals in many *info*
2616 buffers, and don't remember the name of the buffer visiting the manual
2617 you want to consult.) Otherwise, it loads and displays the manual.
2619 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2620 This is for compatibility with the stand-alone Info reader program,
2621 and also because `Info-edit' is a rarely used command that is disabled
2624 ** Mail mode changes (not Message mode)
2626 *** New command M-x mail-add-attachment for adding MIME attachments
2628 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2629 (Its name is misleading, since it has nothing to do with MIME
2630 attachments.) The old name is now an obsolete alias to the new name.
2632 ** MH-E has been updated to MH-E version 8.3.1.
2633 See MH-E-NEWS for details.
2635 ** Modula-2 mode provides auto-indentation.
2637 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2639 ** nXML mode no longer binds C-RET to `nxml-complete'.
2640 Completion is now performed via `completion-at-point', bound to C-M-i
2641 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2642 default), this performs tag completion.
2644 ** Org mode has been updated to version 7.8.09.
2645 See ORG-NEWS for details.
2647 ** Prolog mode has been completely revamped, with lots of additional
2648 functionality such as more intelligent indentation, electricity,
2649 support for more variants, including Mercury, and a lot more.
2653 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2654 in the Rmail incoming message.
2656 *** The variable `rmail-message-filter' no longer has any effect.
2657 This change was made in Emacs 23.1 but was not advertised at the time.
2658 Try using `rmail-show-message-hook' instead.
2662 *** M-x shell prompts for the shell path name if the default directory
2663 is a remote file name and neither the environment variable $ESHELL nor
2664 the variable `explicit-shell-file-name' is set.
2666 *** TAB is now bound to the standard `completion-at-point' command,
2667 which now implements the pcomplete rules for shell command completion.
2671 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2672 if the mail server supports them. This uses either built-in GnuTLS
2673 support, or the starttls.el library. Customize `smtpmail-stream-type'
2676 *** The variable `smtpmail-auth-credentials' has been removed.
2677 By default, the information is now stored in the file ~/.authinfo.
2678 This was the default value of smtpmail-auth-credentials. If you had
2679 customized smtpmail-auth-credentials to a list of user names and
2680 passwords, those settings are not used. During your first connection
2681 to the smtp server, Emacs will prompt for the user name and password,
2682 and offer to save them to ~/.authinfo. Or you can manually copy the
2683 credentials to ~/.authinfo. For example, if you had
2685 (setq smtpmail-auth-credentials
2686 '(("mail.example.org" 25 "jim" "s!cret")))
2688 then the equivalent line in ~/.authinfo would be
2690 machine mail.example.org port 25 login jim password s!cret
2692 See the auth-source manual for more information, e.g. on encrypting
2693 the credentials file.
2695 *** The variable `smtpmail-starttls-credentials' has been removed.
2696 If you had that set, you need to put
2698 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2700 in your ~/.authinfo file instead.
2702 *** SMTPmail defaults to using the address in the From: header as the
2703 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2704 to the address you wish to use instead.
2708 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2709 and `sql-oracle-scan-on'.
2711 *** New options controlling prompting for login parameters.
2712 Each supported product has a custom variable `sql-*-login-params',
2713 which is a list of the parameters to be prompted for before a
2714 connection is established.
2716 *** The command `sql-product-interactive' now takes a prefix argument,
2717 which causes it to prompt for an SQL product.
2719 *** Product-specific SQL interactive commands now take prefix arguments.
2720 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2721 given a prefix argument, prompt for a name for the SQL interactive
2722 buffer. This reduces the need for calling `sql-rename-buffer'.
2724 *** SQL interactive modes suppress command continuation prompts, and
2725 replace tabs with spaces. The first change impacts multiple line SQL
2726 statements entered with C-j between each line, statements yanked into
2727 the buffer and statements sent with `sql-send-*' functions. The
2728 second prevents the MySQL and Postgres interpreters from listing
2729 object name completions when sent text via `sql-send-*' functions.
2731 *** New command `sql-connect' starts a predefined SQLi session,
2732 using the login parameters from `sql-connection-alist'.
2734 *** New "Save Connection" menu item in SQLi buffers.
2735 This gathers the login params specified for the SQLi session, if it
2736 was not started by a connection, and saves them as a new connection.
2738 *** New commands for listing database objects and details:
2739 sql-list-all and sql-list-table.
2741 *** An API for manipulating SQL product definitions has been added.
2745 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2749 *** New inline access method "ksu" (kerberized su).
2751 *** The following access methods are discontinued: "ssh1_old",
2752 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2754 *** The user option `remote-file-name-inhibit-cache' controls whether
2755 remote file attributes are cached for better performance.
2757 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2758 default value to "".
2760 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2761 for remote machines which support SELinux.
2763 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2764 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2765 the degree of parallelism.
2767 ** VC and related modes
2769 *** Support for pulling on distributed version control systems.
2770 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2771 supported (currently with Bzr, Git, and Mercurial), to update the
2772 current branch and working tree. A prefix argument means to prompt
2773 the user for specifics, e.g. a pull location.
2775 *** `vc-update' is now an alias for `vc-pull'.
2777 *** Support for merging on distributed version control systems.
2778 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2779 is supported (currently with Bzr, Git, and Mercurial), to merge
2780 changes from another branch into the current one. It prompts for
2781 specifics, e.g. a merge source.
2783 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2784 shows a diff while querying the user. It defaults to t.
2786 *** Log entries in some Log View buffers can be toggled to display a
2787 longer description by typing RET (log-view-toggle-entry-display).
2788 This is currently supported for Bzr, Git, and Mercurial (to support
2789 another backend, define a `log-view-expanded-log-entry-function').
2790 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2791 use this to display the full log entry for the revision at point.
2793 *** New command `vc-ediff' allows visual comparison of two revisions
2794 of a file similar to `vc-diff', but using ediff backend.
2796 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2797 this was not advertised at the time.
2799 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2800 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2801 this was not advertised at the time.
2807 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2809 *** partial-completion-mode (complete.el) is obsolete.
2810 You can get a comparable behavior with:
2811 (setq completion-styles '(partial-completion initials))
2812 (setq completion-pcm-complete-word-inserts-delimiters t)
2814 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2816 *** pgg is obsolete (use EasyPG instead).
2818 *** sregex.el is obsolete, since rx.el is a strict superset.
2820 *** s-region.el and pc-select.el are obsolete.
2821 They are superseded by shift-select-mode, enabled by default since 23.1.
2823 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2827 *** The Landmark game is now invoked with `landmark', not `lm'.
2828 Its functions and variables have been similarly renamed.
2830 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2831 (This interfered with cua-mode.)
2833 *** f90.el has some support for Fortran 2008 syntax.
2835 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2837 *** New command `nato-region' converts text to NATO phonetic alphabet.
2840 * New Modes and Packages in Emacs 24.1
2842 ** Occur Edit mode applies edits made in *Occur* buffers to the
2843 original buffers. It is bound to "e" in Occur mode.
2845 ** New global minor mode electric-pair-mode.
2846 When enabled, typing an open parenthesis automatically inserts the
2847 matching closing one.
2849 ** New global minor mode electric-indent-mode.
2850 When enabled, typing certain characters triggers reindentation.
2851 Major modes wishing to use this can set electric-indent-chars or
2852 electric-indent-functions.
2854 ** New global minor mode electric-layout-mode.
2855 When enabled, typing certain characters automatically inserts newlines.
2856 Major modes wishing to use this can set electric-layout-rules.
2858 ** tabulated-list.el provides a generic major mode for tabulated data,
2859 from which other modes can be derived.
2861 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2863 ** secrets.el is an implementation of the Secret Service API, an
2864 interface to password managers like GNOME Keyring or KDE Wallet. The
2865 Secret Service API requires D-Bus for communication. The command
2866 `secrets-show-secrets' offers a buffer with a visualization of the
2869 ** notifications.el provides an implementation of the Desktop
2870 Notifications API. It requires D-Bus for communication.
2872 ** soap-client.el supports access to SOAP web services from Emacs.
2873 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2875 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
2877 ** New emacs-lock.el package.
2878 The previous version has been moved to obsolete/old-emacs-lock.el.
2879 Now, there is a proper minor mode `emacs-lock-mode'. Protection
2880 against exiting Emacs and killing the buffer can be set separately.
2881 The mechanism for automatically turning off protection for buffers
2882 with dead inferior processes has been generalized.
2885 * Incompatible Lisp Changes in Emacs 24.1
2887 ** Passing a nil argument to a minor mode function call now ENABLES
2888 the minor mode unconditionally. This is so that you can write e.g.
2890 (add-hook 'text-mode-hook 'foo-mode)
2892 to enable foo-mode in Text mode buffers, removing the need for
2893 `turn-on-foo-mode' style functions. This affects all mode commands
2894 defined by `define-minor-mode'. If called interactively, the mode
2895 command still toggles the minor mode.
2897 ** The return value of `backup-buffer' has changed.
2898 It is now a list of three elements, where the second element is a list
2899 describing the original file's SELinux context. If Emacs or the
2900 system lacks SELinux support, the context list is (nil nil nil nil).
2901 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
2903 ** `char-direction-table' and the `char-direction' function were deleted.
2904 They were buggy and inferior to the new support of bidirectional
2905 editing introduced in Emacs 24. If you need the bidirectional
2906 properties of a character, use `get-char-code-property' with the last
2907 argument `bidi-class'.
2909 ** `copy-directory' now copies the source directory as a subdirectory
2910 of the target directory, if the latter is an existing directory. The
2911 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2912 the contents directly into a pre-existing target directory.
2914 ** For mouse click input events in the text area, the Y pixel
2915 coordinate in the POSITION list now counts from the top of the text
2916 area, excluding any header line. Previously, it counted from the top
2919 ** Support for "old-style" backquotes, obsolete for 10+ years, has
2920 been further reduced. Now a backquote not followed by a space is
2921 always treated as a "new-style" backquote. Please remove all
2922 "old-style" backquotes from your code. If your code uses backquotes
2923 as documented in the Elisp manual, and compiles without warning, then
2924 you have nothing to do in this regard. Code not following the
2925 appropriate conventions may fail to compile.
2927 The most common cause of trouble seems to be an old-style backquote
2928 followed by a newline. Another cause of trouble is vector notation
2929 for key sequence notation: instead of [(control ,)] and [(control ')],
2930 you should write [(control ?,)] and [(control ?')], which will work in
2933 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2934 was not advertised at the time. The function `custom-initialize-delay'
2935 replaced all known uses.
2937 ** `view-buffer' now treats special mode-class in the same way that
2938 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2939 major mode is special).
2941 ** Menu and tool bar changes
2943 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
2944 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2945 With these alist entries omitted, `make-frame' checks the value of the
2946 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2947 a menu-bar or tool-bar, respectively. If the alist entries are added,
2948 they override the value of `menu-bar-mode'/`tool-bar-mode'.
2950 *** The menu bar bindings's caches are not used any more.
2951 Use (where-is-internal <def> nil t) instead.
2953 ** Regions created by mouse dragging are now normal active regions,
2954 similar to those created by shift-selection (see Selection changes
2955 above). In previous Emacs versions, these regions were delineated by
2956 `mouse-drag-overlay'; that variable has been removed.
2958 ** The fourth argument of `filter-buffer-substring' has been removed.
2959 If you want to remove text properties from the final result, simply
2960 pass the result through substring-no-properties.
2962 ** cl.el no longer provides `cl-19'.
2964 ** The following obsolete functions and aliases have been removed
2965 (the appropriate new function is given in parentheses; "not needed"
2966 means you can just remove all calls to the function in question):
2968 *** `comint-kill-output' (`comint-delete-output')
2969 *** `decompose-composite-char' (`char-to-string')
2970 *** `outline-visible' (`outline-invisible-p')
2971 *** `internal-find-face' (`facep')
2972 *** `internal-get-face' (`facep and check-face')
2973 *** `frame-update-faces' (not needed)
2974 *** `frame-update-face-colors' (`frame-set-background-mode')
2975 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2976 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2977 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2978 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2979 *** `x-make-font-unbold' (`make-face-unbold')
2980 *** `x-make-font-unitalic' (`make-face-unitalic')
2981 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2982 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2983 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2984 *** `char-bytes' (== 1)
2985 *** `isearch-return-char' (`isearch-printing-char')
2986 *** `make-local-hook' (not needed)
2987 *** `set-screen-height' (`set-frame-height')
2988 *** `set-screen-width' (`set-frame-width')
2990 ** The following obsolete variables and varaliases have been removed
2991 (the appropriate new variable is given in parentheses):
2993 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2994 *** `vc-header-alist' (`vc-BACKEND-header')
2995 *** `directory-sep-char' (== ?/)
2996 *** `font-lock-defaults-alist' (`font-lock-defaults')
2997 *** `e' (`float-e').
2999 ** The following obsolete files were removed:
3000 sc.el, x-menu.el, rnews.el, rnewspost.el
3002 ** The format of the finder-inf.el file has changed, since the Finder
3003 mechanism is now based on the package system. The variable
3004 `finder-package-info' is replaced by `package--builtins' and
3005 `finder-keywords-hash'.
3007 ** When generating autoloads, `update-directory-autoloads' no longer
3008 assumes every inspected file is in your `load-path'. It instead
3009 generates relative names according to the current `load-path'.
3012 * Lisp Changes in Emacs 24.1
3014 ** Code can now use lexical scoping by default instead of dynamic scoping.
3015 The `lexical-binding' variable enables lexical scoping for local
3016 variables. It is typically set via a file-local variable in the first
3017 line of the file, in which case it applies to all the code in that
3020 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3021 binding instead of the old dynamic binding mode.
3023 *** Lexically scoped interpreted functions are represented with a new form
3024 of function value which looks like (closure ENV ARGS &rest BODY).
3026 *** New macro `letrec' to define recursive local functions.
3028 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3029 So do `defcustom' and other forms that call `defvar' as a subroutine.
3031 *** New function `special-variable-p' to check whether a variable is
3032 declared as dynamically bound.
3034 *** The form ((lambda ...) ...) is deprecated.
3036 ** An Emacs Lisp testing tool is now included.
3037 Emacs Lisp developers can use this tool to write automated tests for
3038 their code. See the ERT info manual for details.
3040 ** Changes for bidirectional display and editing
3042 *** New function `current-bidi-paragraph-direction'.
3043 This returns the base direction of the paragraph at point.
3045 *** New function `bidi-string-mark-left-to-right'.
3046 Given a string containing characters from right-to-left scripts, this
3047 function returns another string which can be safely inserted into a
3048 buffer, such that any following text will be always displayed to the
3049 right of that string. (This works by appending an invisible Unicode
3050 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3052 This is useful when the buffer has overall left-to-right paragraph
3053 direction and you need to insert a string whose contents are not known
3054 in advance, without disrupting the layout of the line.
3058 *** Window tree functions are accessible in Elisp.
3059 Functions are provided to return the parent, siblings or child windows
3060 of any window including internal windows (windows not associated with a
3061 buffer) in the window tree.
3063 **** New function `window-valid-p' gives non-nil for live and internal
3066 **** Window manipulation can deal with internal windows.
3067 Many window handling functions like `split-window', `delete-window', or
3068 `delete-other-windows' as well as the window resizing functions can now
3069 act on any window including internal ones.
3071 *** window-total-height/-width vs window-body-height/-width.
3072 The function `window-height' has been renamed to `window-total-height'
3073 and `window-width' has been renamed to `window-body-width'. The old
3074 names are provided as aliases. Two new functions `window-total-width'
3075 and `window-body-height' are provided.
3077 *** Window parameters specific to window handling functions.
3078 For each window you can specify a parameter to override the default
3079 behavior of a number of functions like `split-window', `delete-window'
3080 and `delete-other-windows'. The variable `ignore-window-parameters'
3081 allows to ignore processing such parameters.
3083 *** New semantics of third argument of `split-window'.
3084 The third argument of `split-window' has been renamed to SIDE and can be
3085 set to any of the values 'below, 'right, 'above, or 'left to make the
3086 new window appear on the corresponding side of the window that shall be
3087 split. Any other value of SIDE will cause `split-window' to split the
3088 window into two side-by-side windows as before.
3090 *** Window resizing functions.
3091 A new standard function for resizing windows called `window-resize' has
3092 been introduced. This and all other functions for resizing windows no
3093 longer delete any windows when they become too small.
3095 *** Deleting the selected window now selects the most recently selected
3096 live window on that frame instead.
3098 *** `adjust-window-trailing-edge' adjustments.
3099 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3100 is able to resize other windows if a window adjacent to the trailing
3101 edge cannot be shrunk any more. This makes its behavior more similar to
3102 that of Emacs 21 without compromising, however, its inability to delete
3103 windows which was introduced in Emacs 22.
3105 *** Window-local buffer lists.
3106 Windows now have local buffer lists. This means that removing a buffer
3107 from display in a window will preferably show the buffer previously
3108 shown in that window with its previous window-start and window-point
3109 positions. This also means that the same buffer may be automatically
3110 shown twice even if it already appears in another window.
3112 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3113 which if non-nil requires the buffer to be displayed in the currently
3114 selected window, signaling an error otherwise. If nil, another window
3115 can be used, e.g. if the selected one is strongly dedicated.
3117 *** `split-window-vertically' and `split-window-horizontally' renamed
3118 to `split-window-below' and `split-window-right' respectively.
3119 The old names are kept as aliases.
3123 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3124 named ACTION, and takes a display action of the same form as
3125 `display-buffer-base-action' (see Changes, above). A non-nil,
3126 non-list value is treated specially, as the old meaning.
3128 **** New variable `display-buffer-overriding-action'.
3130 **** The procedure of `display-buffer' etc. to choose a window is
3131 determined by combining `display-buffer-overriding-action',
3132 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3133 and `display-buffer-fallback-action'. The second and fourth of these
3134 are user-customizable variables.
3136 See the docstring of `display-buffer' for details.
3138 *** New functions `window-state-get' and `window-state-put'.
3139 These functions allow to save and restore the state of an arbitrary
3140 frame or window as an Elisp object.
3144 *** New variable `completion-extra-properties' used to specify extra
3145 properties of the current completion:
3146 - :annotate-function, same as the old completion-annotate-function.
3147 - :exit-function, function to call after completion took place.
3149 *** Functions on `completion-at-point-functions' can return any of the
3150 properties valid for `completion-extra-properties'.
3152 *** `completion-annotate-function' is obsolete.
3154 *** New `metadata' method for completion tables. The metadata thus returned
3155 can specify various details of the data returned by `all-completions':
3156 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3157 used to select a style in completion-category-overrides.
3158 - `annotation-function' to add annotations in *Completions*.
3159 - `display-sort-function' to specify how to sort entries in *Completions*.
3160 - `cycle-sort-function' to specify how to sort entries when cycling.
3162 *** `minibuffer-local-filename-must-match-map' is not used any more.
3163 Instead, the bindings in `minibuffer-local-filename-completion-map'
3164 are combined with `minibuffer-local-must-match-map'.
3166 *** New variable `completing-read-function' allows overriding the
3167 behavior of `completing-read'.
3169 ** `glyphless-char-display' can now distinguish between graphical and
3170 text terminal display, via a char-table entry that is a cons cell.
3172 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3173 Instead, the offending function is removed.
3177 *** New function `run-hook-wrapped' for running an abnormal hook by
3178 passing the hook functions as arguments to a "wrapping" function.
3179 Like `run-hook-with-args-until-success', it stops at the first
3180 non-nil return value.
3182 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3183 set of "wrapping" filters, similar to around advice.
3184 (A version of this macro was actually added in Emacs 23.2 but was not
3185 advertised at the time.)
3189 *** New macro `condition-case-unless-debug' (this was actually added in
3190 Emacs 23.1 as condition-case-no-debug, but not advertised)
3192 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3194 *** Variable `stack-trace-on-error' removed.
3196 *** The debugger can now "continue" from an error, which means it will
3197 jump to the error handler as if the debugger had not been invoked
3198 instead of jumping all the way to the top-level.
3200 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3201 This can be useful when `inhibit-quit' is set.
3203 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3204 named Emacs server instances.
3206 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3207 to redirect STDOUT to a file.
3209 ** The function `format-time-string' now supports the %N directive,
3210 for higher-resolution time stamps.
3212 ** New input reading functions
3214 *** New function `read-char-choice' reads a restricted set of
3215 characters, discarding any inputs not inside the set.
3217 *** The command `read-color' now requires a match for a color name
3218 or RGB triplet, instead of signaling an error if the user provides
3221 **** `facemenu-read-color' is now an alias for `read-color'.
3223 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3224 The variable is now used to load all kind of supported dynamic libraries,
3225 not just image libraries. The previous name is still available as an
3228 ** Syntax parsing changes
3230 *** New variable `syntax-propertize-function'.
3231 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3232 This allows syntax-table properties to be set independently from font-lock:
3233 just call syntax-propertize to make sure the text is propertized.
3234 Together with this new variable come a new hook
3235 syntax-propertize-extend-region-functions, as well as two helper functions:
3236 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3237 as-is; and syntax-propertize-rules which provides a new way to specify
3240 *** Syntax tables support a new "comment style c" additionally to style b.
3242 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3244 ** frame-local variables cannot be let-bound any more.
3246 ** Major and minor mode changes
3248 *** `set-auto-mode' now respects mode: local variables at the end of files,
3249 as well as those in the -*- line.
3251 *** `prog-mode' is a new major mode from which programming modes
3254 **** `prog-mode-hook' can be used to enable features for programming
3255 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3256 on-the-fly spell checking for comments and strings.
3258 **** New minor modes `prettify-symbols-mode' and
3259 `global-prettify-symbols-mode' let the user enable symbol
3260 prettification (replacing a string like "lambda" with the Greek lambda
3263 *** New hook `change-major-mode-after-body-hook', run by
3264 `run-mode-hooks' just before any other mode hooks.
3266 *** Enabled globalized minor modes can be disabled in specific major modes.
3267 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3268 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3270 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3272 ** File-handling changes
3274 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3275 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3276 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3277 argument is supplied (see Trash changes, above).
3279 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3281 ** Tool-bars can display separators.
3282 Tool-bar separators are handled like menu separators in menu-bar maps,
3283 i.e. via menu entries of the form `(menu-item "--")'.
3287 *** Animated images support (currently animated gifs only).
3289 **** `image-animated-p' returns non-nil if an image can be animated.
3291 **** `image-animate' animates a supplied image spec.
3293 **** `image-animate-timer' returns the timer object for an image that
3296 *** `image-extension-data' has been renamed to `image-metadata'.
3297 The old name is an obsolete alias to the new one.
3299 *** Image mode can view any image type that ImageMagick supports.
3300 This requires Emacs to be built with ImageMagick support.
3302 **** New function `imagemagick-types', defined if ImageMagick support
3303 is enabled, returns a list of image file extensions that your
3304 ImageMagick installation supports.
3306 **** New function `imagemagick-register-types' enables ImageMagick
3307 image types in Image mode and in `create-image' and other helper
3310 **** New option `imagemagick-types-inhibit' excludes certain
3311 ImageMagick image types from `imagemagick-register-types'.
3313 **** With ImageMagick support, there are extra Image mode commands to
3314 resize and rotate images: `image-transform-fit-to-height',
3315 `image-transform-fit-to-width', `image-transform-set-rotation', and
3316 `image-transform-set-scale'.
3318 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3319 passes it to the mail user agent function. This argument specifies an
3320 action for returning to the caller after finishing with the mail. For
3321 example, this is used by Rmail to optionally delete a mail window.
3323 ** XML and HTML parsing
3324 If Emacs is compiled with libxml2 support, there are two new
3325 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3326 and `libxml-parse-xml-region' (which parses XML). Both return an
3327 Emacs Lisp parse tree.
3329 ** Networking and encryption changes
3331 *** `open-network-stream' can now be used to open an encrypted stream.
3332 It now accepts an optional `:type' parameter for initiating a TLS
3333 connection, directly or via STARTTLS. To do STARTTLS, additional
3334 parameters (`:end-of-command', `:success', `:capabilities-command')
3335 must also be supplied.
3337 *** New library gnutls.el.
3338 The new function `gnutls-available-p' returns non-nil if Emacs is
3339 built with GnuTLS support. The main entry points are
3340 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3341 these functions through `open-network-stream', because that can
3342 upgrade connections through STARTTLS opportunistically or use plain
3343 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3346 *** New primitive `secure-hash' that supports many secure hash algorithms:
3347 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3348 sha1.el has been removed. The `sha1' feature is provided by default.
3352 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3354 ** Progress reporters can now "spin".
3355 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3356 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3357 time you call `progress-reporter-update' on that progress reporter,
3358 with a nil or omitted VALUE argument, the reporter message is
3359 displayed with a "spinning bar".
3361 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3362 being reverted, even if the buffer has a local `revert-buffer-function'.
3364 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3365 If delayed-warnings-list is non-nil, the command loop calls
3366 `delayed-warnings-hook' after `post-command-hook'. At present, this
3367 is only used by Emacs on some platforms to display warnings during
3368 startup, which might otherwise not be noticed. This uses the
3369 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3371 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3373 ** New function `make-composed-keymap' that constructs a new keymap
3374 from multiple input maps. You can use this to make a keymap that
3375 inherits from multiple maps, eg:
3376 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3378 ** New function `string-prefix-p'.
3379 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3381 ** New reader macro ## that stands for the empty symbol.
3382 This means that the empty symbol can now be read back. Also, #: by itself
3383 (when not immediately followed by a possible symbol character) stands for
3384 an empty uninterned symbol.
3386 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3388 ** The following functions and variables are obsolete:
3390 *** `tooltip-use-echo-area' is obsolete.
3391 Rather than setting this to t, disable Tooltip mode instead.
3393 *** buffer-substring-filters is obsolete.
3394 Use `filter-buffer-substring-functions' instead.
3396 *** `byte-compile-disable-print-circle' is obsolete.
3398 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3399 Use `post-command-hook' instead.
3401 *** `font-lock-maximum-size' is obsolete.
3404 * Changes in Emacs 24.1 on Non-Free Operating Systems
3406 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3407 and also when HOME is set to C:\ by default.
3409 ** New configure.bat options
3411 *** --enable-checking builds Emacs with extra runtime checks.
3413 *** --distfiles specifies files to be included in binary distribution.
3415 *** --without-gnutls disables automatic GnuTLS detection.
3417 *** --lib for general library linkage, works with the USER_LIBS build variable.
3419 ** New make target `dist' to create binary distribution for MS Windows.
3421 ** The Lisp function `w32-default-color-map' is now obsolete.
3422 (It is only used internally in the Emacs C code.)
3424 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3425 reappear on mouse-over. (Requires OS X 10.6 or later.)
3427 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3428 other platforms, rather than inserting its contents into the buffer.
3431 ----------------------------------------------------------------------
3432 This file is part of GNU Emacs.
3434 GNU Emacs is free software: you can redistribute it and/or modify
3435 it under the terms of the GNU General Public License as published by
3436 the Free Software Foundation, either version 3 of the License, or
3437 (at your option) any later version.
3439 GNU Emacs is distributed in the hope that it will be useful,
3440 but WITHOUT ANY WARRANTY; without even the implied warranty of
3441 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3442 GNU General Public License for more details.
3444 You should have received a copy of the GNU General Public License
3445 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3450 paragraph-separate: "[
\f]*$"