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.
644 *** New option `imenu-generic-skip-comments-and-strings'.
647 * New Modes and Packages in Emacs 24.4
649 ** New `superword-mode' in subword.el
650 `superword-mode' overrides the default word motion commands to treat
651 symbol_words as a single word, similar to what `subword-mode' does and
652 using the same internal functions.
654 ** New nadvice.el package offering lighter-weight advice facilities.
656 - add-function/remove-function which can be used to add/remove code on any
657 function-carrying place, such as process-filters or `<foo>-function' hooks.
658 - advice-add/advice-remove to add/remove a piece of advice on a named function,
659 much like `defadvice' does.
661 ** New frameset.el package.
662 It provides a set of operations to save a frameset (the state of all
663 or a subset of the existing frames and windows, somewhat similar to a
664 frame configuration), both in-session and persistently, and restore it
665 at some point in the future.
668 ** The package filenotify.el provides an interface for file system
669 notifications. It requires, that Emacs is compiled with one of the
670 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
673 * Incompatible Lisp Changes in Emacs 24.4
675 ** `kill-region' lost its `yank-handler' optional argument.
677 ** `(input-pending-p)' no longer runs other timers which are ready to
678 run. The new optional CHECK-TIMERS param allows for the prior behavior.
680 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
682 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
683 Some languages match those as »...« and others as «...» so better stay neutral.
685 ** The default file coding for Emacs Lisp files is now utf-8.
686 (See file-coding-system-alist.) In most cases, this change is transparent, but
687 files that contain unusual characters without specifying an explicit coding
688 system may fail to load with obscure errors.
689 You should either convert them to utf-8 or add an explicit `coding:' cookie.
691 ** overriding-terminal-local-map does not replace the local keymaps any more.
692 It used to disable the minor mode, major mode, and text-property keymaps,
693 whereas now it simply has higher precedence.
695 ** Default process filters and sentinels are not nil any more.
696 Instead they default to a function which does what the nil value used to do.
698 ** `read-event' does not return decoded chars in ttys any more.
699 Just as was the case in Emacs-22 and before, decoding of tty input according to
700 keyboard-coding-system is not performed in read-event any more. But contrary
701 to that past, it is still done before input-decode-map/function-key-map/...
703 ** Removed inhibit-local-menu-bar-menus.
705 ** frame-local variables that affect redisplay do not work any more.
706 More specifically, the redisplay does not bother to check for a frame-local
707 value when looking up variables.
709 ** nil and "unbound" are indistinguishable in symbol-function.
710 `symbol-function' never signals `void-function' any more.
711 `fboundp' returns non-nil if the symbol was `fset' to nil.
713 ** `defadvice' does not honor the `freeze' flag and cannot advise
714 special-forms any more.
716 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
717 VAR was bound to nil which was not tremendously useful and just lead to
718 spurious warnings about an unused var.
720 ** The return value of `backup-buffer' has changed.
721 The second argument is no longer an SELinux context, instead it is an
722 alist of extended attributes as returned by the new function
723 `file-extended-attributes'. The attributes can be applied to another
724 file using `set-file-extended-attributes'.
726 ** `visited-file-modtime' now returns -1 for nonexistent files.
727 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
728 in the presence of files with negative time stamps.
730 ** The cars of the elements in `interpreter-mode-alist' are now treated
731 as regexps rather than literal strings. Technically this is an
732 incompatible change, but unless you are using interpreter-mode-alist
733 for something (not just adding elements to it), it ought not to affect you.
736 * Lisp Changes in Emacs 24.4
738 ** New function get-pos-property.
740 ** New hook `pre-redisplay-function'.
743 ** Functions that pop up menus and dialogs now work on all terminal types,
745 This includes `x-popup-menu', `x-popup-dialog', `message-box',
748 The function `display-popup-menus-p' will now return non-nil for a
749 display or frame whenever a mouse is supported on that display or
752 ** New bool-vector set operation functions:
753 *** `bool-vector-exclusive-or'
754 *** `bool-vector-union'
755 *** `bool-vector-intersection'
756 *** `bool-vector-set-difference'
757 *** `bool-vector-not'
758 *** `bool-vector-subsetp'
759 *** `bool-vector-count-consecutive'
760 *** `bool-vector-count-population'
762 ** Comparison functions =, <, >, <=, >= now take many arguments.
764 ** The second argument of `eval' can now be a lexical-environment.
766 ** `with-demoted-errors' takes an additional argument `format'.
768 ** New function `define-error'.
770 ** New hook `tty-setup-hook'.
773 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
775 ** New library helpers.el for misc helper functions
776 *** `hash-table-keys'
777 *** `hash-table-values'
778 *** `string-trim-left'
779 *** `string-trim-right'
782 ** Obsoleted functions:
785 *** `lisp-complete-symbol'
787 *** `minibuffer-completion-contents'
788 *** `isearch-nonincremental-exit-minibuffer'
789 *** `isearch-filter-visible'
790 *** `generic-make-keywords-list'
792 ** `with-wrapper-hook' is obsoleted by `add-function'.
793 The few hooks that used with-wrapper-hook are replaced as follows:
794 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
795 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
796 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
798 ** `split-string' now takes an optional argument TRIM.
799 The value, if non-nil, is a regexp that specifies what to trim from
800 the start and end of each substring.
802 ** New function `string-suffix-p'.
804 ** `get-upcase-table' is obsoleted by the new `case-table-get-table'.
806 ** Support for filesystem notifications.
807 Emacs now supports notifications of filesystem changes, such as
808 creation, modification, and deletion of files. This requires the
809 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
810 MS-Windows systems, this is supported for Windows XP and newer
813 ** Changes in autorevert.el
816 *** If Emacs is compiled with file notification support, notifications
817 are used instead of checking the time stamp of the files. You can
818 disable this by setting the user option `auto-revert-use-notify' to
819 nil. Alternatively, a regular expression of directories to be
820 excluded from file notifications can be specified by
821 `auto-revert-notify-exclude-dir-regexp'.
824 *** The new user option `auto-revert-remote-files' enables reversion
825 of remote files when set to non-nil.
829 *** The function `face-spec-set' is now analogous to `setq' for face specs.
830 Its third arg now accepts values specifying exactly which face spec to
831 set (defface, custom, or user spec), and it directly sets the relevant
832 property using the supplied face spec.
834 *** Face specs set via Custom themes now replace the `defface' spec
835 rather than inheriting from it (as do face specs set via Customize).
837 *** New face characteristic (supports :underline (:style wave))
838 specifies whether or not the terminal can display a wavy line.
840 *** New face spec attribute :distant-foreground
841 specifies foreground to use if background color is near the foreground
842 color that would otherwise have been used.
847 *** `image-animated-p' is now `image-multi-frame-p'.
848 It returns non-nil for any image that contains multiple frames,
849 whether or not it specifies a frame delay.
852 *** When animating images that do not specify a frame delay,
853 Emacs uses `image-default-frame-delay'.
856 *** New functions `image-current-frame' and `image-show-frame' for getting
857 and setting the current frame of a multi-frame image.
859 *** You can change the speed of animated images.
861 ** Changes in encoding and decoding of text
864 *** New coding-system `prefer-utf-8'.
865 This is like `undecided' but prefers UTF-8 on decoding if the text to
866 be decoded does not contain any invalid UTF-8 sequences. On encoding,
867 any non-ASCII characters are automatically encoded as UTF-8.
870 *** New attributes of coding-systems whose type is `undecided'.
871 Two new attributes, `:inhibit-null-byte-detection' and
872 `:inhibit-iso-escape-detection', determine how to detect encoding of
873 text that includes null bytes and ISO-2022 escape sequences,
874 respectively. Each of these attributes can be either nil, zero, or
875 t. If it is t, decoding text ignores null bytes and, respectively,
876 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
877 with no-conversion and ISO-2022 sequences cause Emacs to assume the
878 text is encoded in one of the ISO-2022 encodings, such as
879 iso-2022-7bit. If the value is zero, Emacs consults the variables
880 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
882 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
883 UTF-8 encoding and decoding, whenever possible.
885 These attributes are only meaningful for coding-systems of type
886 `undecided'. (The type of a coding-system is determined by its
887 `:coding-type' attribute and can be accessed by calling the
888 `coding-system-type' function.)
890 ** The function `set-visited-file-modtime' now accepts a 0 or -1 argument
891 with the same interpretation as the returned value of `visited-file-modtime'.
893 ** time-to-seconds is not obsolete any more.
894 ** New functions special-form-p and macrop.
895 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
896 text-property on the first char.
898 ** The `defalias-fset-function' property lets you catch calls to defalias
899 and redirect them to your own function instead of `fset'.
901 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
902 When you edit DIR/FILE, Emacs normally creates a symbolic link
903 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
904 is being edited. Formerly, if there was already a non-symlink file
905 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
906 through DIR/.#FILE.9. These fallbacks have been removed, so that
907 Emacs now no longer locks DIR/FILE in that case.
909 On file systems that do not support symbolic links, the lock is now a
910 regular file with contents being what would have been in the symlink.
912 ** The 9th element returned by `file-attributes' is now unspecified.
913 Formerly, it was t if the file's gid would change if file were deleted
914 and recreated. This value has been inaccurate for years on many
915 platforms, and nobody seems to have noticed or cared.
917 ** The function `file-ownership-preserved-p' now has an optional
918 argument GROUP which causes it check for file group too. This can be
919 used in place of the 9th element of `file-attributes'.
921 ** New functions `group-gid' and `group-real-gid'.
923 ** The 6th argument to `copy-file' has been renamed to
924 `preserve-extended-attributes' as it now handles both SELinux context
927 ** The `common-substring' argument of display-completion-list is obsolete.
928 Either use `completion-all-completions' which already returns highlighted
929 strings (including for partial or substring completion) or call
930 `completion-hilit-commonality' to add the highlight.
932 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
934 *** The package descriptor and name of global variables, constants,
935 and functions should be separated by two hyphens if the symbol is not
936 meant to be used by other packages.
939 * Changes in Emacs 24.4 on Non-Free Operating Systems
941 ** The procedure for building Emacs on MS-Windows has changed.
942 It is now built by running the same configure script as on all other
943 platforms. This requires the MSYS environment and MinGW development
944 tools. See the updated instructions in nt/INSTALL for details.
946 Using the Posix configure script and Makefile's also means a change in
947 the directory structure of the Emacs installation on Windows. It is
948 now the same as on GNU and Unix systems. In particular, the auxiliary
949 programs, such as cmdproxy.exe and hexl.exe, are in
950 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
951 version), version-independent site-lisp is in share/emacs/site-lisp,
952 version-specific Lisp files are in share/emacs/VERSION/lisp and in
953 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
954 files are in share/emacs/VERSION/etc. (Emacs knows about all these
955 directories and will find the files in there automatically; there's no
956 need to set any variables due to this change.)
959 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
960 The backtrace is written to the 'emacs_backtrace.txt' file in the
961 directory where Emacs was running.
964 ** The variable `buffer-file-type' is no longer supported.
965 Setting it has no effect, and %t in the mode-line format is ignored.
966 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
967 modifying it has no effect.
970 ** Lock files now work on MS-Windows.
971 This allows to avoid losing your edits if the same file is being
972 edited in another Emacs session or by another user. See the node
973 "Interlocking" in the Emacs User Manual for the details. To disable
974 file locking, customize `create-lockfiles' to nil.
976 ** Improved fullscreen support on Mac OS X.
977 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
978 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
979 native is the default.
982 * Installation Changes in Emacs 24.3
984 ** The default X toolkit is now Gtk+ version 3.
985 If you don't pass `--with-x-toolkit' to configure, or if you use
986 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
987 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
988 You can explicitly require a specific version by passing
989 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
991 ** New configure option `--enable-link-time-optimization', to utilize
992 an appropriate feature provided by GCC since version 4.5.0.
994 ** New configure option `--without-all' to disable most of the optional
995 features (image support, etc.) that are normally enabled by default.
997 ** New configure option `--enable-gcc-warnings' (for developing/debugging
998 Emacs). If building with GCC, this enables compile-time checks that
999 warn/give errors about possibly-questionable C code. On a recent GNU
1000 system there should be no warnings; on older and on non-GNU systems
1001 the results may be useful to developers.
1003 ** The configure option `--enable-use-lisp-union-type' has been
1004 renamed to `--enable-check-lisp-object-type', as the resulting
1005 Lisp_Object type no longer uses a union to implement the compile time
1006 check that this option enables.
1008 ** The configure option `--disable-maintainer-mode' has been removed,
1009 as it was confusingly-named and rarely useful.
1011 ** The configure options `--program-prefix', `--program-suffix', and
1012 `--program-transform-name' apply to more than just the installed
1013 binaries. Now they also affect the man pages, icons, and the
1014 etc/emacs.desktop file; but not the info pages, since this would break
1015 links between the various manuals.
1017 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1018 overwriting "emacs" in the installation bin/ directory with a link
1021 ** Emacs uses libtinfo in preference to libncurses, if available.
1023 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1024 /usr/pkg/lib to the linker search path. You must add them yourself if
1027 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1028 (from the bin and libexec directories, respectively). The former is
1029 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1032 * Startup Changes in Emacs 24.3
1034 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1035 lisp/ directory. There should not be any there anyway. If you have
1036 been adding them there, put them somewhere else; e.g., site-lisp.
1038 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1041 * Changes in Emacs 24.3
1045 *** `C-h f' (`describe-function') can now perform autoloading.
1046 When this command is called for an autoloaded function whose docstring
1047 contains a key substitution construct, that function's library is
1048 automatically loaded, so that the documentation can be shown
1049 correctly. To disable this, set `help-enable-auto-load' to nil.
1051 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1052 even after their associated libraries have been loaded (and the
1053 autoloads have been redefined as functions).
1057 *** Images displayed via ImageMagick now support transparency and the
1058 :background image specification property.
1060 *** When available, ImageMagick support is automatically enabled.
1061 It is no longer necessary to call `imagemagick-register-types'
1062 explicitly to install ImageMagick image types; that function is called
1063 automatically at startup, or when customizing an imagemagick- option.
1065 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1066 ImageMagick to view images. (You must call `imagemagick-register-types'
1067 afterwards if you do not use customize to change this.)
1069 *** The new variable `imagemagick-enabled-types' also affects which
1070 ImageMagick types are treated as images. The function
1071 `imagemagick-filter-types' returns the list of types that will be
1074 *** ImageMagick images now support the :max-width and :max-height
1077 *** Some data types aren't auto-detected by ImageMagick. Adding
1078 :format to `create-image' may help if the content type is in the
1079 new variable `image-format-suffixes'.
1083 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1084 next and previous path separator, respectively.
1086 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1087 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1088 non-nil before enabling the mode.
1092 *** New option `mode-line-default-help-echo' specifies the help text
1093 (shown in a tooltip or in the echo area) for any part of the mode line
1094 that does not have its own specialized help text.
1096 *** You can now click mouse-3 in the coding system indicator to invoke
1097 `set-buffer-file-coding-system'.
1099 ** Server and client
1101 *** emacsclient now obeys string values for `initial-buffer-choice',
1102 if it is told to open a new frame without specifying any file to visit
1103 or expression to evaluate.
1105 *** New option `server-auth-key' specifies a shared server key.
1107 ** Emacs now generates backtraces on fatal errors.
1108 On encountering a fatal error, Emacs now outputs a textual description
1109 of the fatal signal, and a short backtrace on platforms like glibc
1110 that support backtraces.
1112 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1113 This minor mode replaces `toggle-read-only', which is now obsolete.
1115 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1116 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1117 respectively, without exiting from the prompt.
1119 ** In the Package Menu, newly-available packages are listed as "new",
1120 and sorted above the other "available" packages by default.
1122 ** If your Emacs was built from a bzr checkout, the new variable
1123 `emacs-bzr-version' contains information about the bzr revision used.
1125 ** New option `create-lockfiles' specifies usage of lockfiles.
1126 It defaults to t. Changing it to nil inhibits the creation of lock
1127 files (use this with caution).
1129 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1130 variables on remote hosts.
1132 ** The entry for PCL-CVS has been removed from the Tools menu.
1133 The PCL-CVS commands are still available via the keyboard.
1135 ** Using "unibyte: t" in Lisp source files is obsolete.
1136 Use "coding: raw-text" instead.
1138 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1139 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1140 The previous binding, introduced in Emacs 24.1, was a mistake, because
1141 `C-c LETTER' bindings are reserved for user customizations.
1143 ** Internationalization
1145 *** New language environment: Persian.
1147 *** New input method `vietnamese-vni'.
1149 ** Nextstep (GNUstep / Mac OS X) port
1151 *** Support for fullscreen and the frame parameter fullscreen.
1153 *** A file dialog is used for open/save operations initiated from the
1157 * Editing Changes in Emacs 24.3
1159 ** Search and Replace
1161 *** Non-regexp Isearch now performs "lax" space matching.
1162 Each sequence of spaces in the supplied search string may match any
1163 sequence of one or more whitespace characters, as specified by the
1164 variable `search-whitespace-regexp'. (This variable is also used by a
1165 similar existing feature for regexp Isearch.)
1167 *** New Isearch command `M-s SPC' toggles lax space matching.
1168 This applies to both ordinary and regexp Isearch.
1170 *** New option `replace-lax-whitespace'.
1171 If non-nil, `query-replace' uses flexible whitespace matching too.
1174 *** Global `M-s _' starts a symbol (identifier) incremental search,
1175 and `M-s _' in Isearch toggles symbol search mode.
1176 `M-s c' in Isearch toggles search case-sensitivity.
1178 ** Navigation commands
1180 *** New binding `M-g c' for `goto-char'.
1182 *** New binding `M-g TAB' for `move-to-column'.
1184 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1185 interactively with no prefix arg. Previously, it moved to column 1.
1187 ** New option `yank-handled-properties' allows processing of text
1188 properties on yanked text, in ways that are more general than just
1189 removing them (as is done by `yank-excluded-properties').
1191 ** New option `delete-trailing-lines' specifies whether
1192 M-x delete-trailing-whitespace should delete trailing lines at the end
1193 of the buffer. It defaults to t.
1195 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1197 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1198 `ucs-insert' is now an obsolete alias for `insert-char'.
1200 ** The `z' key no longer has a binding in most special modes.
1201 It used to be bound to `kill-this-buffer', but `z' is too easy to
1204 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1205 It copies the region-rectangle as the last rectangle kill.
1209 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1211 *** New option `register-separator' specifies the register containing
1212 the text to put between collected texts for use with
1213 M-x append-to-register and M-x prepend-to-register.
1216 * Changes in Specialized Modes and Packages in Emacs 24.3
1218 ** Common Lisp emulation (CL)
1220 *** CL's main entry is now (require 'cl-lib).
1221 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1222 i.e., all its definitions have the "cl-" prefix (and internal definitions
1223 use the "cl--" prefix).
1225 If `cl' provided a feature under the name `foo', then `cl-lib'
1226 provides it under the name `cl-foo' instead; with the exceptions of the
1227 few `cl' definitions that had to use `foo*' to avoid conflicts with
1228 pre-existing Elisp entities. These have been renamed to `cl-foo'
1229 rather than `cl-foo*'.
1231 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1232 provide the old, non-prefixed names. Some exceptions are listed below:
1234 *** `cl-flet' is not like `flet' (which is deprecated).
1235 Instead it obeys the behavior of Common-Lisp's `flet'.
1236 In particular, in cl-flet function definitions are lexically scoped,
1237 whereas in flet the scoping is dynamic.
1239 *** `cl-labels' is slightly different from `labels'.
1240 The difference is that it relies on the `lexical-binding' machinery
1241 (as opposed to the `lexical-let' machinery used previously) to capture
1242 definitions in closures, so such closures will only work if `lexical-binding'
1245 *** `cl-letf' is not exactly like `letf'.
1246 The only difference is in details that relate to some deprecated usage
1247 of `symbol-function' in place forms.
1249 *** `progv' was rewritten to use the `let' machinery.
1250 A side effect is that variables without corresponding values are bound
1251 to nil rather than being made unbound.
1253 *** The following methods of extending `setf' are obsolete
1254 (use features from gv.el instead):
1255 `define-modify-macro' (use `gv-letplace')
1256 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1257 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1258 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1262 *** Changes are now highlighted using the same color scheme as in
1263 modern VCSes. Deletions are displayed in red (new faces
1264 `diff-refine-removed' and `smerge-refined-removed', and new definition
1265 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1266 and `smerge-refined-added', and new definition of `diff-added').
1268 *** The variable `diff-use-changed-face' defines whether to use the
1269 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1270 changes in context diffs.
1272 *** The new command `diff-delete-trailing-whitespace' removes trailing
1273 whitespace introduced by a diff.
1275 ** Ediff now uses the same color scheme as Diff mode.
1279 A new version of python.el, which provides several new features, including:
1280 per-buffer shells, better indentation, Python 3 support, and improved
1281 shell-interaction compatible with iPython (and virtually any other
1284 *** Some user options have been replaced/renamed, including (old -> new):
1285 **** python-indent -> python-indent-offset
1286 **** python-guess-indent -> python-indent-guess-indent-offset
1287 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1288 **** python-use-skeletons -> python-skeleton-autoinsert
1290 *** Some user options have been removed, including:
1292 **** `python-indent-string-contents': Strings are never indented.
1294 **** `python-honour-comment-indentation':
1295 Comments are always considered as indentation markers.
1297 **** `python-continuation-offset': Indentation is automatically
1298 calculated in a pep8 compliant way depending on the context.
1300 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1301 Have no direct mapping as the shell interaction is completely different.
1303 **** `python-python-command', `python-jython-command':
1304 Replaced by `python-shell-interpreter'.
1306 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1307 `python-pdbtrack-minor-mode-string', `python-source-modes':
1310 *** Some commands have been replaced (old -> new):
1311 **** python-insert-class -> python-skeleton-class
1312 **** python-insert-def -> python-skeleton-def
1313 **** python-insert-for -> python-skeleton-for
1314 **** python-insert-if -> python-skeleton-if
1315 **** python-insert-try/except -> python-skeleton-try
1316 **** python-insert-try/finally -> python-skeleton-try
1317 **** python-insert-while -> python-skeleton-while
1318 **** python-find-function -> python-nav-jump-to-defun
1319 **** python-next-statement -> python-nav-forward-sentence
1320 **** python-previous-statement -> python-nav-backward-sentence
1321 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1322 **** python-end-of-defun-function -> python-nav-end-of-defun
1323 **** python-send-buffer -> python-shell-send-buffer
1324 **** python-send-defun -> python-shell-send-defun
1325 **** python-send-region -> python-shell-send-region
1326 **** python-send-region-and-go -> emulate with python-shell-send-region
1327 and python-shell-switch-to-shell
1328 **** python-send-string -> python-shell-send-string
1329 **** python-switch-to-python -> python-shell-switch-to-shell
1330 **** python-describe-symbol -> python-eldoc-at-point
1334 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1336 *** The D-Bus object manager interface is implemented.
1338 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1339 if their value does not fit into Emacs's integer range.
1341 *** The function `dbus-call-method' is now non-blocking.
1342 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1344 *** Signals can also be sent as unicast messages.
1346 *** The argument list of `dbus-register-signal' has been extended,
1347 according to the new match rule types of D-Bus.
1349 *** `dbus-init-bus' supports private connections.
1351 *** There is a new function `dbus-setenv'.
1353 ** `desktop-path' no longer includes the "." directory.
1354 Desktop files are now located in ~/.emacs.d by default.
1358 *** `dired-do-async-shell-command' executes each file sequentially
1359 if the command ends in `;' (when operating on multiple files).
1360 Otherwise, it executes the command on each file in parallel.
1362 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1363 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1366 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1367 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1368 mark/unmark/flag all files in the active region.
1370 *** The minibuffer default for `=' (`dired-diff') has changed.
1371 It is now the backup file for the file at point, if one exists.
1372 In Transient Mark mode the default is the file at the active mark.
1374 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1375 The global binding for `M-=', `count-words-region' is in effect.
1379 *** New module "notifications", which can send a notification when you
1380 receive a private message or your nickname is mentioned.
1382 *** ERC will look up server/channel names via auth-source and use any
1385 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1386 only applies to messages sent by lurkers.
1388 ** reStructuredText mode
1390 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1391 fontification, comment handling, and customization have all been revised
1394 *** Support for `imenu' and `which-function-mode'.
1396 *** The reStructuredText syntax is more closely covered.
1397 Sphinx support has been improved.
1399 *** `rst-insert-list' inserts new list or continues existing lists.
1401 *** A negative prefix argument always works for `rst-adjust'.
1403 *** The window configuration is reset after displaying a TOC.
1405 *** The constant `rst-version' describes the rst.el package version.
1409 *** Support for percent literals and recognition of regular expressions
1410 in method calls without parentheses with more methods, including Cucumber
1413 *** Improved syntax highlighting and indentation.
1415 *** New command `ruby-toggle-block', bound to `C-c {'.
1417 *** Some non-standard keybindings/commands have been removed:
1419 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1421 **** `ruby-mark-defun'; use `mark-defun'.
1423 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1424 appropriate settings for the variables `beginning-of-defun-function'
1425 and `end-of-defun-function'.
1427 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1428 `reindent-then-newline-and-indent' and `newline' have been removed.
1430 ** Shell Script mode
1432 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1434 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1436 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1440 *** The free software compiler GHDL is supported (and now the default).
1442 *** Support for the VHDL-AMS packages has been added/updated.
1444 *** Updated to the 2002 revision of the VHDL standard.
1446 *** Accepts \r and \f as whitespace.
1450 *** The faces used by Apropos are now directly customizable.
1451 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1452 see the `apropos' Custom group for details.
1454 *** The old options whose values specified faces to use have been removed
1455 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1459 *** This package has been rewritten to use Tabulated List mode.
1461 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1462 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1466 *** Algebraic simplification mode is now the default.
1467 To restrict to the limited simplifications given by the former
1468 default simplification mode, use `m I'.
1472 *** You can customize the header text that appears above each calendar month.
1473 See the variable `calendar-month-header'.
1475 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1477 *** The calendars produced by cal-html include holidays.
1478 Customize `cal-html-holidays' to change this.
1482 *** The major modes from the parser generators "Bovine" and "Wisent"
1483 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1484 are in `auto-mode-alist', and the corresponding manuals are included.
1488 **** Menu support for the "Configuration" feature. This allows users to
1489 choose the active configuration (such as debug or install) from the menu.
1491 **** New command `ede-set' to interactively set project-local variables.
1493 **** Support for compiling, debugging, and running in "generic" projects.
1495 **** Autoconf editing support for M4 macros with complex arguments.
1497 **** Compilation support for the "linux" project type.
1499 **** "simple" projects have been removed; use "generic" projects instead.
1503 **** Support for parsing #include statements inside a namespace in C/C++.
1505 **** Improved support for 'extern "C"' declarations in C/C++.
1507 **** The ability to ignore more common special C/C++ preprocessor symbols,
1508 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1509 If available, include cdefs.h as an additional source of preprocessor symbols.
1511 **** Improved C/C++ function pointer parsing.
1513 **** In Python, support for converting imports to include file names.
1515 **** Ability to dynamically determine the Python load path.
1517 **** Support for the Python 'WITH' and 'AT' keywords.
1519 **** Improved tooltip completion.
1523 **** The SRecode manual is now included.
1525 **** Tag generation supports constructor/destructor settings and system
1526 include differentiation.
1528 **** Addition of 'Framework' support: Frameworks are specified when a
1529 particular kind of library (such as Android) is needed in a common language
1532 **** Support for nested templates and let variables override based on priority.
1534 **** Support for merging tables from multiple related modes, such as
1535 default -> c++ -> arduino.
1537 ** Compile has a new option `compilation-always-kill'.
1541 *** `custom-reset-button-menu' now defaults to t.
1543 *** Non-option variables are never matched in `customize-apropos' and
1544 `customize-apropos-options' (i.e., the prefix argument does nothing for
1545 these commands now).
1549 *** The variables `term-default-fg-color' and `term-default-bg-color'
1550 are now deprecated in favor of the customizable face `term'.
1552 *** You can customize how to display ANSI terminal colors and styles
1553 by customizing the corresponding `term-color-<COLOR>',
1554 `term-color-underline' and `term-color-bold' faces.
1558 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1560 *** Remote processes are now also supported on remote MS-Windows hosts.
1564 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1565 Previously, this slot stored semicolon-separated attribute-value pairs
1566 appended to some imap URLs, but this is not compatible with RFC 3986.
1567 So now the `filename' slot stores the entire path and query components,
1568 and the `attributes' slot is always nil.
1570 *** New function `url-encode-url' for encoding a URI string.
1571 The `url-retrieve' function now uses this to encode its URL argument,
1572 in case that is not properly encoded.
1574 *** New command `url-cookie-list' displays all the current cookies, and
1575 allows deleting selected cookies.
1577 ** notifications.el supports now version 1.2 of the Notifications API.
1578 The function `notifications-get-capabilities' returns the supported
1581 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1582 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1583 `flymake-warning-bitmap'.
1585 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1586 specifying URL types that should be converted to remote file names at
1587 the FFAP prompt. The default is now '("ftp").
1589 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1590 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1592 ** New option `mouse-avoidance-banish-position' specifies where the
1593 `banish' mouse avoidance setting moves the mouse.
1595 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1596 closing brackets to be aligned with the line of the opening bracket.
1598 ** In Proced mode, new command `proced-renice' renices marked processes.
1600 ** New option `async-shell-command-buffer' specifies the buffer to use
1601 for a new asynchronous `shell-command' when the default output buffer
1602 `*Async Shell Command*' is already in use.
1604 ** SQL mode has a new option `sql-db2-escape-newlines'.
1605 If non-nil, newlines sent to the command interpreter will be escaped
1606 by a backslash. The default does not escape the newlines and assumes
1607 that the sql statement will be terminated by a semicolon.
1609 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1610 (and modes that derive from it), sorts the column at point, or the Nth
1611 column if a numeric prefix argument is given.
1613 ** `which-func-modes' now defaults to t, so Which Function mode, when
1614 enabled, applies to all applicable major modes.
1616 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1619 ** Follow mode no longer works by using advice.
1620 The option `follow-intercept-processes' has been removed.
1622 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1624 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1625 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1626 *** semantic-change-hooks -> semantic-change-functions
1627 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1628 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1629 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1630 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1631 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1632 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1633 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1634 *** rcirc-activity-hooks -> rcirc-activity-functions
1635 *** rcirc-print-hooks -> rcirc-print-functions
1636 *** dbus-event-error-hooks -> dbus-event-error-functions
1637 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1638 *** checkdoc-style-hooks -> checkdoc-style-functions
1639 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1640 *** archive-extract-hooks -> archive-extract-hook
1641 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1642 *** hfy-post-html-hooks -> hfy-post-html-hook
1643 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1644 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1645 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1646 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1648 ** Obsolete packages
1651 In most cases, assoc+member+push+delq work just as well.
1652 And in any case it's just a terrible package: ugly semantics, terrible
1653 inefficiency, and not namespace-clean.
1662 * Incompatible Lisp Changes in Emacs 24.3
1664 ** Docstrings starting with `*' no longer indicate user options.
1665 Only variables defined using `defcustom' are considered user options.
1666 The function `user-variable-p' is now an obsolete alias for
1667 `custom-variable-p'.
1669 ** The return values of `defalias', `defun' and `defmacro' have changed,
1670 and are now undefined. For backwards compatibility, `defun' and
1671 `defmacro' currently return the name of the newly defined
1672 function/macro, but this should not be relied upon.
1674 ** `random' by default now returns a different random sequence in
1675 every Emacs run. Use `(random S)', where S is a string, to set the
1676 random seed to a value based on S, in order to get a repeatable
1677 sequence in later calls.
1679 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1680 that substring is inserted literally even if the LITERAL arg is
1681 non-nil, instead of causing an error to be signaled.
1683 ** `select-window' now always makes the window's buffer current.
1684 It does so even if the window was selected before.
1686 ** The function `x-select-font' can return a font spec, instead of a
1687 font name as a string. Whether it returns a font spec or a font name
1688 depends on the graphical library.
1690 ** `face-spec-set' no longer sets frame-specific attributes when the
1691 third argument is a frame (that usage was obsolete since Emacs 22.2).
1693 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1695 ** The CL package's `get-setf-method' function no longer exists.
1696 Generalized variables are now part of core Emacs Lisp, and implemented
1697 differently to the way cl.el used to do it. It is not possible to
1698 define a compatible replacement for `get-setf-method'. See the file
1699 gv.el for internal details of the new implementation.
1701 ** The arguments of `dbus-register-signal' are no longer just strings,
1702 but keywords or keyword-string pairs. The old argument list will
1703 still be supported for Emacs 24.x.
1705 ** Miscellaneous name changes
1706 Some Lisp symbols have been renamed to correct their spelling,
1707 or to be more consistent with standard Emacs terminology.
1709 *** Renamed functions
1710 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1711 **** inactivate-input-method -> deactivate-input-method
1712 **** quail-inactivate -> quail-deactivate
1713 **** robin-inactivate -> robin-deactivate
1714 **** viper-inactivate-input-method -> viper-deactivate-input-method
1715 **** viper-inactivate-input-method-action ->
1716 viper-deactivate-input-method-action
1717 **** ucs-input-inactivate -> ucs-input-deactivate
1720 The old hooks are still supported for backward compatibility, but they
1721 are deprecated and will be removed eventually.
1722 **** input-method-inactivate-hook -> input-method-deactivate-hook
1723 **** robin-inactivate-hook -> robin-deactivate-hook
1724 **** quail-inactivate-hook -> quail-deactivate-hook
1726 *** Renamed variables
1727 **** follow-deactive-menu -> follow-inactive-menu
1728 **** inactivate-current-input-method-function ->
1729 deactivate-current-input-method-function
1731 ** Some obsolete functions, variables, and faces have been removed:
1732 *** `last-input-char', `last-command-char', `unread-command-char'
1733 *** `facemenu-unlisted-faces'
1734 *** `rmail-decode-mime-charset'
1735 *** `iswitchb-read-buffer'
1736 *** `sc-version', `sc-submit-bug-report'
1737 *** `set-char-table-default'
1738 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1739 *** `compile-internal'
1741 *** `mode-line-inverse-video'
1742 *** `follow-mode-off-hook'
1743 *** `cvs-commit-buffer-require-final-newline'
1744 (use `log-edit-require-final-newline' instead)
1745 *** `cvs-changelog-full-paragraphs'
1746 (use `log-edit-changelog-full-paragraphs' instead)
1747 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1748 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1749 *** `vc-master-templates' (use `vc-handled-backends' instead)
1750 *** `vc-checkout-carefully'
1753 * Lisp Changes in Emacs 24.3
1755 ** CL-style generalized variables are now in core Elisp.
1756 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1757 You can define your own generalized variables using `gv-define-simple-setter',
1758 `gv-define-setter', etc.
1760 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1761 This can significantly speed up execution of non-byte-compiled code,
1762 but can also bump into previously unnoticed cyclic dependencies.
1763 These are generally harmless: they will simply cause the macro calls
1764 to be left for later expansion (as before), but will result in a
1765 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1766 You may wish to restructure your code so this does not happen.
1768 ** New sampling-based Elisp profiler.
1769 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1770 When finished, use M-x profiler-stop. The sampling rate can be based on
1771 CPU time or memory allocations.
1773 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1774 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1776 ** New macros `setq-local' and `defvar-local'.
1778 ** Face underlining can now use a wave.
1780 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1781 of `read-regexp' accepts a string ending with a colon and space, and its
1782 second argument DEFAULTS can be a list of strings accessible via `M-n'
1783 in the minibuffer ahead of other hard-coded useful regexp-related values.
1784 More commands use `read-regexp' now to read their regexp arguments.
1788 *** New function `completion-table-with-quoting' to handle completion
1789 in the presence of quoting, such as file completion in shell buffers.
1791 *** New function `completion-table-subvert' to use an existing completion
1792 table, but with a different prefix.
1796 *** New error type and new function `user-error'.
1797 These do not trigger the debugger.
1799 *** New option `debugger-bury-or-kill', saying what to do with the
1800 debugger buffer when exiting debug.
1802 *** Set `debug-on-message' to enter the debugger when a certain
1803 message is displayed in the echo area. This can be useful when trying
1804 to work out which code is doing something.
1806 *** New var `inhibit-debugger', automatically set to prevent accidental
1807 recursive invocations.
1811 *** New command `fit-frame-to-buffer' adjusts the frame height to
1814 *** The command `fit-window-to-buffer' can adjust the frame height
1815 if the new option `fit-frame-to-buffer' is non-nil.
1817 *** New macro `with-temp-buffer-window', similar to
1818 `with-output-to-temp-buffer'.
1820 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1823 *** New option `switch-to-buffer-preserve-window-point' to restore a
1824 window's point when switching buffers.
1826 *** New display action alist entry `no-display-ok' to indicate the
1827 caller of `display-buffer' is ready to handle the case of not
1828 displaying the buffer.
1830 *** New display action alist entries `window-height' and `window-width'
1831 specify the size of new windows created by `display-buffer'.
1833 *** New display action alist entry `pop-up-frame-parameters', if
1834 non-nil, specifies frame parameters to give any newly-created frame.
1836 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1837 tells display action functions to avoid changing which frame is
1840 *** New display action alist entry `previous-window', if non-nil,
1841 specifies window to reuse in `display-buffer-in-previous-window'.
1843 *** New display action functions `display-buffer-below-selected',
1844 and `display-buffer-in-previous-window'.
1846 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1847 now accept a third argument to avoid choosing the selected window.
1849 *** Additional values recognized for option `window-combination-limit'.
1851 *** The following variables are obsolete, as they can be replaced by
1852 appropriate entries in the `display-buffer-alist' function introduced
1854 **** `dired-shrink-to-fit'
1855 **** `display-buffer-reuse-frames'
1856 **** `display-buffer-function'
1857 **** `special-display-buffer-names'
1858 **** `special-display-frame-alist'
1859 **** `special-display-function'
1860 **** `special-display-regexps'
1864 *** `current-time-string' no longer requires that its argument's year
1865 must be in the range 1000..9999. It now works with any year supported
1866 by the underlying C implementation.
1868 *** `current-time' now returns extended-format time stamps
1869 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1870 PSEC is typically a multiple of 1000 on current machines. Other
1871 functions that use this format, such as `file-attributes' and
1872 `format-time-string', have been changed accordingly. Old-format time
1873 stamps are still accepted.
1875 *** The format of timers in `timer-list' and `timer-idle-list' is now
1876 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1877 The PSECS slot is new, and uses picosecond resolution. It can be
1878 accessed via the new `timer--psecs' accessor.
1880 *** Last-modified time stamps in undo lists now are of the form
1881 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1885 *** Improved security when handling persistent objects:
1887 **** `eieio-persistent-read' now features optional arguments for specifying
1888 the class to load, as well as a flag stating whether subclasses are allowed;
1889 if provided, other classes will be rejected by the reader. For
1890 compatibility with existing code, if the class is omitted only a
1893 **** New specialized reader for pulling in classes and signaling errors
1894 without evaluation of suspicious code.
1896 **** All slots that contain objects must have a :type. Slots with lists
1897 of objects must use a new type predicate for a list of an object type.
1899 *** Support for `find-function' and similar utilities, through the addition
1900 of filename support to generated symbols.
1902 ** Floating point functions now always return special values like NaN,
1903 instead of signaling errors, if given invalid args; e.g., (log -1.0).
1904 Previously, they returned NaNs on some platforms but signaled errors
1905 on others. The affected functions are acos, asin, tan, exp, expt,
1906 log, log10, sqrt, and mod.
1908 ** New fringe bitmap `exclamation-mark'.
1910 ** Miscellaneous changes to special forms and macros
1912 *** `defun' and `defmacro' are now macros rather than special forms.
1914 *** `kbd' is now a function rather than a macro.
1916 ** Miscellaneous new functions
1918 *** `set-temporary-overlay-map' sets up a temporary keymap that
1919 takes precedence over most other maps for a short while (normally one key).
1921 *** `autoloadp' tests if its argument is an autoloaded object.
1923 *** `autoload-do-load' performs the autoloading operation.
1925 *** `buffer-narrowed-p' tests if the buffer is narrowed.
1927 *** `file-name-base' returns a file name sans directory and extension.
1929 *** `function-get' fetches a function property, following aliases.
1931 *** `posnp' tests if an object is a `posn'.
1933 *** `system-users' returns the user names on the system.
1935 *** `system-groups' returns the group names on the system.
1937 *** `tty-top-frame' returns the topmost frame of a text terminal.
1939 ** The following functions and variables are obsolete:
1940 *** `automount-dir-prefix' (use `directory-abbrev-alist')
1941 *** `buffer-has-markers-at'
1942 *** `macro-declaration-function' (use `macro-declarations-alist')
1943 *** `window-system-version' (provides no useful information)
1944 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
1945 *** `query-replace-interactive'
1946 *** `font-list-limit' (has had no effect since Emacs < 23)
1949 * Changes in Emacs 24.3 on Non-Free Operating Systems
1951 ** Cygwin builds can use the native MS Windows user interface.
1952 Pass `--with-w32' to configure. The default remains the X11 interface.
1954 ** Two new functions are available in Cygwin builds:
1955 `cygwin-convert-file-name-from-windows' and
1956 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
1957 code to access the Cygwin file-name mapping machinery to convert
1958 between Cygwin and Windows-native file and directory names.
1960 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
1961 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
1962 `mouse-autoselect-window'.
1964 ** On MS Windows Vista and later Emacs now supports symbolic links.
1966 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
1967 support for libxml2, even if its presence is detected.
1969 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1971 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
1972 directories to the search path. You must add them yourself if you want them.
1975 * Changes in Emacs 24.2
1977 ** This is mainly a bug-fix release.
1980 * Installation Changes in Emacs 24.1
1982 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1983 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1984 also depend on Gtk+. You can disable them with --without-rsvg and
1987 ** Emacs can be compiled with GnuTLS support.
1988 This happens by default if a suitably recent version of the library is
1989 found at build time. To prevent this, use the configure option
1990 `--without-gnutls'. See below for GnuTLS features.
1992 ** Emacs can be compiled with SELinux support.
1993 This happens by default if a suitably recent version of the library is
1994 found at build time. To prevent this, use the configure option
1995 `--without-selinux'. See below for SELinux features.
1997 ** Emacs can be compiled with ImageMagick support.
1998 This happens by default if a suitably recent version of the library is
1999 found at build time. To prevent this, use the configure option
2000 `--without-imagemagick'. See below for ImageMagick features.
2001 This feature is not available for the Nextstep or MS ports.
2003 ** Emacs can be compiled with libxml2 support.
2004 This happens by default if a suitably recent version of the library is
2005 found at build time. To prevent this, use the configure option
2006 `--without-xml2'. See below for libxml2 features.
2008 ** By default, the installed Info and man pages are compressed.
2009 You can disable this by configuring --without-compress-info.
2011 ** New configure option --with-wide-int.
2012 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2013 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2016 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2017 These provide no new functionality, they just remove the need to edit
2018 lib-src/Makefile by hand in order to use the associated features.
2020 ** New configure option --enable-use-lisp-union-type.
2021 This is only useful for Emacs developers to debug certain types of bugs.
2022 This is not a new feature; only the configure flag is new.
2024 ** The standalone programs digest-doc and sorted-doc are removed.
2025 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2027 ** The standalone program `fakemail' is removed.
2028 If you need it, feedmail.el provides a superset of the functionality.
2031 * Startup Changes in Emacs 24.1
2033 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2034 command line arguments, and the EMACS_UNIBYTE environment variable, no
2035 longer have any effect. (They were declared obsolete in Emacs 23.)
2037 ** New command line option `--no-site-lisp' removes site-lisp directories
2038 from load-path. -Q now implies this. This option does not affect the
2039 EMACSLOADPATH environment variable (and hence has no effect for
2043 * Changes in Emacs 24.1
2047 *** Many packages now use the `completion-at-point' command,
2048 rather than implementing separate completion commands.
2050 *** `completion-at-point' now handles tags and semantic completion.
2052 *** Completion in a non-minibuffer now tries to detect the end of completion
2053 and pops down the *Completions* buffer accordingly.
2055 *** New option `completion-cycle-threshold' allows completion cycling.
2057 *** New option `completion-category-overrides' for overriding the
2058 default completion style in certain circumstances.
2060 *** New completion style `substring'.
2062 *** Completion of buffer names uses `substring' completion by default.
2064 *** The option `widget-complete-field' has been removed.
2068 *** The first time you try sending mail, Emacs asks for a mail method.
2069 This is implemented by a new default for `send-mail-function', which
2070 is `sendmail-query-once'. This offers to use the smtpmail package, or
2071 to use the old defaults relying on external mail facilities
2072 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2073 `mailclient-send-it' on Windows).
2075 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2076 transfers the report to your desktop's preferred mail client, if there
2077 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2080 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2081 and Mail mode changes
2083 ** Emacs server and client changes
2085 *** New option `server-port' specifies the port for TCP Emacs servers.
2087 *** New emacsclient argument -q/--quiet suppresses some status messages.
2089 *** New emacsclient argument --frame-parameters specifies the frame
2090 parameters of any newly-created graphical frame.
2092 *** If emacsclient shuts down due to Emacs signaling an error,
2093 its exit status is 1.
2095 *** New emacsclient argument --parent-id ID.
2096 This opens a client frame in parent X window ID, via XEmbed, similar
2097 to the --parent-id argument to Emacs.
2099 ** Internationalization changes
2101 *** Emacs now supports display and editing of bidirectional text.
2102 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2103 displayed in the correct visual order as expected by users of those
2104 scripts. The display reordering is a "full bidirectionality" class
2105 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2106 with no RTL text should look exactly the same as before.
2108 **** New buffer-local variable `bidi-display-reordering'.
2109 To disable display reordering in a buffer, change this to nil.
2111 **** New buffer-local variable `bidi-paragraph-direction'.
2112 If nil (the default), Emacs determines the base direction of each
2113 paragraph from its text, as specified by the UBA. Setting the value
2114 to `right-to-left' or `left-to-right' forces a base direction on each
2117 Paragraphs with right-to-left base direction are displayed starting at
2118 the right window edge.
2120 *** Enhanced support for characters with no glyphs in available fonts,
2121 or, on text terminals, characters that cannot be encoded by the
2122 terminal coding system. The new option `glyphless-char-display-control'
2123 specifies how to display them: as a hexadecimal code in a box, a thin
2124 1-pixel space, an empty box, etc.
2126 *** New input methods for Farsi and Bulgarian
2127 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2129 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2130 (U+2010 and U+2011).
2132 *** New Hebrew translation of the Emacs Tutorial.
2133 Type `C-u C-h t' to choose it in case your language setup doesn't
2134 automatically select it.
2136 ** An Emacs Lisp package manager is now included.
2137 This is a convenient way to download and install additional packages,
2138 from a package repository at http://elpa.gnu.org.
2140 *** M-x list-packages shows a list of packages, which can be
2141 selected for installation.
2143 *** New command `describe-package', bound to `C-h P'.
2145 *** By default, all installed packages are loaded automatically when
2146 Emacs starts up. To disable this, set `package-enable-at-startup' to
2147 nil. To specify the packages to load, customize `package-load-list'.
2149 ** Custom theme changes
2151 *** New command `M-x customize-themes', which provides a convenient
2152 interface for enabling and disabling Custom themes.
2154 *** New option `custom-theme-load-path' is the load path for themes.
2155 Emacs no longer looks for Custom themes in `load-path'. The default
2156 value of `custom-theme-load-path' says to look for themes in
2157 `custom-theme-directory', followed by a subdirectory of
2158 `data-directory' named "themes/", which contains a small selection of
2159 built-in Custom themes.
2161 *** New option `custom-safe-themes' records known-safe theme files.
2162 If a theme is not in this list, Emacs queries before loading it, and
2163 offers to save the theme to `custom-safe-themes' automatically. By
2164 default, all themes included in Emacs are treated as safe.
2166 ** Improved GTK integration
2168 *** GTK scroll-bars are now placed on the right by default.
2169 The function `set-scroll-bar-mode' can change this.
2171 *** GTK tool bars can have just text, just images or images and text.
2172 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2173 the default is taken from desktop settings.
2175 *** GTK tool bars can be placed on any edge of the frame.
2176 The frame-parameter tool-bar-position controls this. It takes the
2177 values top, left, right or bottom. The Options => Show/Hide menu has
2180 *** The default colors for selected text (the `region' face) are taken
2181 from the GTK theme when Emacs is built with GTK.
2183 *** Emacs uses GTK tooltips by default if built with GTK.
2184 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2186 ** Graphical interface changes
2188 *** On graphical displays, the mode-line no longer ends in dashes.
2189 Also, the first dash (which does not indicate anything) is just
2190 displayed as a space.
2192 *** `menu-bar-select-buffer-function' lets you choose another operation
2193 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2195 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2196 built with Xft. These fonts can be set via X resources, for example:
2197 Emacs.pane.menubar.font: Courier-12
2201 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2202 or if it receives a SIGINT signal in batch mode.
2204 *** `kill-emacs-hook' is now also run in batch mode.
2205 Third-party code which adds to `kill-emacs-hook' should check if they
2206 do the right thing in batch mode.
2208 ** Scrolling changes
2210 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2211 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2212 of buffer at first key-press (instead they move to top/bottom of buffer)
2213 when `scroll-error-top-bottom' is non-nil.
2215 *** New option `scroll-error-top-bottom' (see above).
2217 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2218 scroll a line instead of full screen.
2220 *** New property `scroll-command' should be set on a command's symbol to
2221 define it as a scroll command affected by `scroll-preserve-screen-position'.
2223 *** If you customize `scroll-conservatively' to a value greater than 100,
2224 Emacs will never recenter point in the window when it scrolls due to
2225 cursor motion commands or commands that move point (e.f., `M-g M-g').
2226 Previously, you needed to use `most-positive-fixnum' as the value of
2227 `scroll-conservatively' to achieve the same effect.
2229 *** "Aggressive" scrolling now honors the scroll margins.
2230 If you customize `scroll-up-aggressively' or
2231 `scroll-down-aggressively' and move point off the window, Emacs now
2232 scrolls the window so as to avoid positioning point inside the scroll
2235 ** Basic SELinux support has been added.
2236 This requires Emacs to be linked with libselinux at build time.
2238 *** Emacs preserves the SELinux file context when backing up.
2239 Also, the function `copy-file' has an extra optional argument for
2240 preserving SELinux context, and the return value of `backup-buffer'
2241 now includes the SELinux context.
2243 *** New functions `file-selinux-context' and `set-file-selinux-context'
2244 get and set the SELinux context of a file.
2248 *** `delete-by-moving-to-trash' now only affects commands that specify
2249 trashing. This avoids inadvertently trashing temporary files.
2251 *** Calling `delete-file' or `delete-directory' with a prefix argument
2252 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2254 ** File- and directory-local variable changes
2256 *** You can stop directory local vars from applying to subdirectories.
2257 Add an element (subdirs . nil) to the alist portion of any variables
2258 settings to indicate that the section should not apply to
2261 *** Directory local variables can apply to some file-less buffers.
2262 Affected modes include dired, vc-dir, and log-edit. For example,
2263 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2264 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2265 `hack-dir-local-variables-non-file-buffer' to support this.
2267 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2268 Instead, use "eval: (minor-mode 1)".
2270 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2271 to `inhibit-local-variables-regexps'. As the name suggests, it now
2272 applies to ALL file local variables, not just -*- lines. The
2273 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2278 *** The `quit-window' command now restores the last buffer displayed
2279 in the quitted window.
2281 *** Resizing an Emacs frame now preserves proportional window sizes,
2282 modulo restrictions like window minimum sizes and fixed-size windows.
2284 *** The behavior of `display-buffer' is now customizable in detail.
2286 **** New option `display-buffer-base-action' specifies a list of
2287 user-determined display "actions" (functions and optional arguments
2288 for choosing the displaying window).
2290 This takes precedence over the default display action, which is
2291 specified by `display-buffer-fallback-action'.
2293 **** New option `display-buffer-alist' maps buffer name regexps to
2294 display actions, taking precedence over `display-buffer-base-action'.
2296 *** New option `window-combination-limit'.
2297 The new option `window-combination-limit' allows to return the space
2298 obtained for resizing or creating a window more reliably to the window
2299 from which such space was obtained.
2301 *** New option `window-combination-resize'.
2302 The new option `window-combination-resize' allows to split a window that
2303 otherwise cannot be split because it's too small by stealing space from
2304 other windows in the same combination. Subsequent resizing or deletion
2305 of the window will resize all windows in the same combination as well.
2307 *** New option `frame-auto-hide-function' lets you choose between
2308 iconifying or deleting a frame when burying a buffer in a dedicated
2309 frame, or quitting a window showing a buffer in a frame of its own.
2311 *** New commands `maximize-window' and `minimize-window'.
2312 These maximize and minimize the size of a window within its frame.
2314 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2315 These functions allow to navigate through the live buffers that have
2316 been shown in a specific window.
2318 ** Minibuffer changes
2320 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2321 This is handy for minibuffer-only frames, and is also used for the feature
2322 where mouse-1 pops up *Messages*"', which can now easily be changed.
2324 *** Minibuffers set `truncate-lines' to nil.
2325 If you want to change the value to something else, you could use
2326 for example `minibuffer-setup-hook'.
2328 ** `auto-mode-case-fold' is now enabled by default.
2330 ** `backup-by-copying-when-mismatch' now defaults to t.
2332 ** New basic faces `error', `warning', `success'.
2333 These are used to highlight text indicating failure, caution or
2334 successful operation.
2336 ** New option `list-colors-sort' defines the color sort order
2337 for `list-colors-display'.
2339 ** The variable `focus-follows-mouse' now always defaults to nil.
2342 * Editing Changes in Emacs 24.1
2346 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2347 `isearch-yank-line'.
2349 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2350 `isearch-yank-kill'.
2352 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2354 ** New commands `count-words-region' and `count-words'.
2356 *** M-= is bound to `count-words-region', not `count-lines-region'.
2357 The `count-words-region' command, when called interactively, reports
2358 the number of lines, words, and characters in the region. It is a
2359 superset of the old `count-lines-region', which is now an obsolete
2362 ** The command `just-one-space' (M-SPC), if given a negative argument,
2363 also deletes newlines around point.
2367 *** New option `delete-active-region'.
2368 If non-nil, [delete] and DEL delete the region if it is active and no
2369 prefix argument is given. If set to `kill', those commands kill
2372 *** New command `delete-forward-char', bound to [delete].
2373 This is meant for interactive use, and obeys `delete-active-region'.
2374 The command `delete-char' does not obey `delete-active-region'.
2376 *** `delete-backward-char' is now a Lisp function.
2377 Apart from obeying `delete-active-region', its behavior is unchanged.
2378 However, the byte compiler now warns if it is called from Lisp; Lisp
2379 callers should use delete-char with a negative argument instead.
2381 *** The option `mouse-region-delete-keys' has been deleted.
2383 ** Selection changes.
2385 The default handling of clipboard and primary selections has been
2386 changed to conform with modern X applications. In short, most
2387 commands for killing and yanking text now use the clipboard, while
2388 mouse commands use the primary selection.
2390 In the following, we provide a list of these changes, followed by a
2391 list of steps to get the old behavior back if you prefer that.
2393 *** `select-active-regions' now defaults to t.
2394 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2395 the kill ring. The selected text is put in the primary selection, if
2396 the system possesses a separate primary selection facility (e.g. X).
2398 **** `select-active-regions' also accepts a new value, `only'.
2399 This means to only set the primary selection for temporarily active
2400 regions (usually made by mouse-dragging or shift-selection);
2401 "ordinary" active regions, such as those made with C-SPC followed by
2402 point motion, do not alter the primary selection.
2404 **** `mouse-drag-copy-region' now defaults to nil.
2406 *** mouse-2 is now bound to `mouse-yank-primary'.
2407 This pastes from the primary selection, ignoring the kill-ring.
2408 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2410 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2412 *** `x-select-enable-primary' now defaults to nil.
2413 Thus, commands that kill text or copy it to the kill-ring (such as
2414 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2416 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2417 exactly equivalent to M-w, C-w, and C-y respectively.
2419 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2420 non-nil by default, as Windows does not support the primary selection
2421 between applications.
2423 *** To return to the previous behavior, do the following:
2425 **** Change `select-active-regions' to nil.
2426 **** Change `mouse-drag-copy-region' to t.
2427 **** Change `x-select-enable-primary' to t (on X only).
2428 **** Change `x-select-enable-clipboard' to nil.
2429 **** Bind `mouse-yank-at-click' to mouse-2.
2431 *** Support for X cut buffers has been removed.
2433 *** X clipboard managers are now supported.
2434 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2436 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2437 in the current rectangle. With a prefix argument, this prompts for a
2438 number to count from and for a format string.
2440 ** `redisplay-dont-pause' now defaults to t.
2441 This makes Emacs feel more responsive to editing commands that arrive
2442 at high rate, e.g. if you lean on some key, because stopping redisplay
2443 in the middle (when this variable is nil) forces more expensive
2444 updates later on, and Emacs appears to be unable to keep up.
2446 ** The behavior of <TAB> for active regions in Text mode has changed.
2447 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2448 when the region is active causes Emacs to indent all the lines in the
2449 region, aligning them with the line previous to the first line in the
2450 region (or with the left margin if there is no previous line).
2452 ** When `occur' is called with a prefix argument, matching strings are
2453 collected into the `*Occur*' buffer without line numbers. If there
2454 are parenthesized subexpressions in the specified regexp, `occur'
2455 reads replacement text that may contain \\& and \\N whose convention
2456 follows `replace-match'.
2459 * Changes in Specialized Modes and Packages in Emacs 24.1
2461 ** Archive Mode has basic support for browsing and updating 7z archives.
2465 *** BibTeX mode now supports biblatex.
2466 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2467 `bibtex-entry-field-alist' is now an obsolete alias for
2468 `bibtex-BibTeX-entry-alist'.
2470 *** New command `bibtex-search-entries', bound to C-c C-a.
2472 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2474 *** New variable `bibtex-search-entry-globally'.
2478 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2480 *** The default browser used by the package is now the "xdg-open" program,
2481 on platforms that support it. This calls your desktop's preferred browser.
2485 *** Support for musical notes.
2487 *** Support for logarithmic units.
2489 *** No longer uses the tex prefix for TeX specific unit names when
2490 using TeX or LaTeX mode.
2492 *** New option to highlight selections using faces.
2494 *** `calc-histogram' has the option of using a vector to determine the bins.
2496 *** New "O" option prefix.
2498 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2500 ** Calendar, Diary, and Appt
2502 *** Diary entries can contain non-printing "comments".
2503 See the variable `diary-comment-start'.
2505 *** Appointments can specify their individual warning times.
2506 See the variable `appt-warning-time-regexp'.
2508 *** The function specified by `appt-disp-window-function' may be passed
2509 lists of arguments if multiple appointments are due at similar times.
2510 If you are using a custom function for this, you should update it.
2512 *** New function `diary-hebrew-birthday'.
2514 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2515 may no longer be nil, but must all be strings.
2517 *** The obsolete (since Emacs 22.1) method of enabling the appt
2518 package by adding `appt-make-list' to `diary-hook' has been removed.
2519 Use `appt-activate' instead.
2521 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2522 appt-issue-message (use the function appt-activate)
2523 appt-visible/appt-msg-window (use the variable appt-display-format)
2525 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2526 view-diary-entries, list-diary-entries, show-all-diary-entries
2530 *** New feature to "guess" the style in an existing buffer.
2531 The main entry point is M-x c-guess.
2533 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2535 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2536 Thus C-M-a will, by default, go to the beginning of the immediate function,
2539 *** "Macros with semicolons" can be registered for correct indentation.
2540 Where such a macro ends a line (no semicolon) the next statement is no longer
2541 parsed as a statement continuation.
2543 ** Comint and modes derived from it use the standard completion code.
2547 *** Compilation mode can be used without Font Lock mode.
2548 `compilation-parse-errors-function' is now obsolete.
2550 *** New variable `compilation-filter-start', which is bound while
2551 `compilation-filter-hook' runs. It records the start position of the
2552 text inserted by `compilation-filter'.
2554 *** `compilation-error-screen-columns' and `compilation-first-column'
2555 are obeyed in the editing buffer. So programming language modes can
2556 set them, whereas previously only the value in the *Compilation*
2561 *** Customize buffers now contain a search field.
2562 The search is performed using `customize-apropos'.
2563 To turn off the search field, set `custom-search-field' to nil.
2565 *** Options in customize group buffers start out hidden if not customized.
2566 Use the arrow to the left of the option name to toggle visibility.
2568 *** custom-buffer-sort-alphabetically now defaults to t.
2570 *** The color widget now has a "Choose" button, which allows you to
2571 choose a color via `list-colors-display'.
2575 *** It is now possible to access buses other than the default system
2578 *** The `dbus-register-method' and `dbus-register-property' functions
2579 optionally do not register names.
2581 *** The new function `dbus-register-service' registers a known service
2582 name on a D-Bus without also registering a property or a method.
2586 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2587 if called with a prefix argument, read a file name from the minibuffer
2588 instead of using the current buffer.
2590 *** The "dired local variables" feature of Dired-x is obsolete.
2591 The standard directory local variables feature replaces it.
2595 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2596 controlling attempts to autojoin a channel.
2598 *** New variable `erc-coding-system-precedence': If we use `undecided'
2599 as the server coding system, this variable will then be consulted.
2600 The default is to decode strings that can be decoded as utf-8 as
2601 utf-8, and do the normal `undecided' decoding for the rest.
2605 *** The default value of `eshell-directory-name' has changed
2606 to be an "eshell" directory in `user-emacs-directory'.
2607 The old "~/.eshell/" directory is still used if it exists, though.
2611 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2612 It now supports multithread non-stop debugging and simultaneous
2613 debugging of several threads.
2617 *** RET (`image-toggle-animation') toggles animation, if applicable.
2618 Animation plays once, unless the option `image-animate-loop' is non-nil.
2622 *** New command M-x info-display-manual displays a named Info manual.
2623 If that manual is already visited in some Info buffer, it displays
2624 that buffer. (This is handy if you have many manuals in many *info*
2625 buffers, and don't remember the name of the buffer visiting the manual
2626 you want to consult.) Otherwise, it loads and displays the manual.
2628 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2629 This is for compatibility with the stand-alone Info reader program,
2630 and also because `Info-edit' is a rarely used command that is disabled
2633 ** Mail mode changes (not Message mode)
2635 *** New command M-x mail-add-attachment for adding MIME attachments
2637 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2638 (Its name is misleading, since it has nothing to do with MIME
2639 attachments.) The old name is now an obsolete alias to the new name.
2641 ** MH-E has been updated to MH-E version 8.3.1.
2642 See MH-E-NEWS for details.
2644 ** Modula-2 mode provides auto-indentation.
2646 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2648 ** nXML mode no longer binds C-RET to `nxml-complete'.
2649 Completion is now performed via `completion-at-point', bound to C-M-i
2650 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2651 default), this performs tag completion.
2653 ** Org mode has been updated to version 7.8.09.
2654 See ORG-NEWS for details.
2656 ** Prolog mode has been completely revamped, with lots of additional
2657 functionality such as more intelligent indentation, electricity,
2658 support for more variants, including Mercury, and a lot more.
2662 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2663 in the Rmail incoming message.
2665 *** The variable `rmail-message-filter' no longer has any effect.
2666 This change was made in Emacs 23.1 but was not advertised at the time.
2667 Try using `rmail-show-message-hook' instead.
2671 *** M-x shell prompts for the shell path name if the default directory
2672 is a remote file name and neither the environment variable $ESHELL nor
2673 the variable `explicit-shell-file-name' is set.
2675 *** TAB is now bound to the standard `completion-at-point' command,
2676 which now implements the pcomplete rules for shell command completion.
2680 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2681 if the mail server supports them. This uses either built-in GnuTLS
2682 support, or the starttls.el library. Customize `smtpmail-stream-type'
2685 *** The variable `smtpmail-auth-credentials' has been removed.
2686 By default, the information is now stored in the file ~/.authinfo.
2687 This was the default value of smtpmail-auth-credentials. If you had
2688 customized smtpmail-auth-credentials to a list of user names and
2689 passwords, those settings are not used. During your first connection
2690 to the smtp server, Emacs will prompt for the user name and password,
2691 and offer to save them to ~/.authinfo. Or you can manually copy the
2692 credentials to ~/.authinfo. For example, if you had
2694 (setq smtpmail-auth-credentials
2695 '(("mail.example.org" 25 "jim" "s!cret")))
2697 then the equivalent line in ~/.authinfo would be
2699 machine mail.example.org port 25 login jim password s!cret
2701 See the auth-source manual for more information, e.g. on encrypting
2702 the credentials file.
2704 *** The variable `smtpmail-starttls-credentials' has been removed.
2705 If you had that set, you need to put
2707 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2709 in your ~/.authinfo file instead.
2711 *** SMTPmail defaults to using the address in the From: header as the
2712 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2713 to the address you wish to use instead.
2717 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2718 and `sql-oracle-scan-on'.
2720 *** New options controlling prompting for login parameters.
2721 Each supported product has a custom variable `sql-*-login-params',
2722 which is a list of the parameters to be prompted for before a
2723 connection is established.
2725 *** The command `sql-product-interactive' now takes a prefix argument,
2726 which causes it to prompt for an SQL product.
2728 *** Product-specific SQL interactive commands now take prefix arguments.
2729 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2730 given a prefix argument, prompt for a name for the SQL interactive
2731 buffer. This reduces the need for calling `sql-rename-buffer'.
2733 *** SQL interactive modes suppress command continuation prompts, and
2734 replace tabs with spaces. The first change impacts multiple line SQL
2735 statements entered with C-j between each line, statements yanked into
2736 the buffer and statements sent with `sql-send-*' functions. The
2737 second prevents the MySQL and Postgres interpreters from listing
2738 object name completions when sent text via `sql-send-*' functions.
2740 *** New command `sql-connect' starts a predefined SQLi session,
2741 using the login parameters from `sql-connection-alist'.
2743 *** New "Save Connection" menu item in SQLi buffers.
2744 This gathers the login params specified for the SQLi session, if it
2745 was not started by a connection, and saves them as a new connection.
2747 *** New commands for listing database objects and details:
2748 sql-list-all and sql-list-table.
2750 *** An API for manipulating SQL product definitions has been added.
2754 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2758 *** New inline access method "ksu" (kerberized su).
2760 *** The following access methods are discontinued: "ssh1_old",
2761 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2763 *** The user option `remote-file-name-inhibit-cache' controls whether
2764 remote file attributes are cached for better performance.
2766 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2767 default value to "".
2769 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2770 for remote machines which support SELinux.
2772 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2773 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2774 the degree of parallelism.
2776 ** VC and related modes
2778 *** Support for pulling on distributed version control systems.
2779 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2780 supported (currently with Bzr, Git, and Mercurial), to update the
2781 current branch and working tree. A prefix argument means to prompt
2782 the user for specifics, e.g. a pull location.
2784 *** `vc-update' is now an alias for `vc-pull'.
2786 *** Support for merging on distributed version control systems.
2787 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2788 is supported (currently with Bzr, Git, and Mercurial), to merge
2789 changes from another branch into the current one. It prompts for
2790 specifics, e.g. a merge source.
2792 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2793 shows a diff while querying the user. It defaults to t.
2795 *** Log entries in some Log View buffers can be toggled to display a
2796 longer description by typing RET (log-view-toggle-entry-display).
2797 This is currently supported for Bzr, Git, and Mercurial (to support
2798 another backend, define a `log-view-expanded-log-entry-function').
2799 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2800 use this to display the full log entry for the revision at point.
2802 *** New command `vc-ediff' allows visual comparison of two revisions
2803 of a file similar to `vc-diff', but using ediff backend.
2805 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2806 this was not advertised at the time.
2808 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2809 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2810 this was not advertised at the time.
2816 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2818 *** partial-completion-mode (complete.el) is obsolete.
2819 You can get a comparable behavior with:
2820 (setq completion-styles '(partial-completion initials))
2821 (setq completion-pcm-complete-word-inserts-delimiters t)
2823 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2825 *** pgg is obsolete (use EasyPG instead).
2827 *** sregex.el is obsolete, since rx.el is a strict superset.
2829 *** s-region.el and pc-select.el are obsolete.
2830 They are superseded by shift-select-mode, enabled by default since 23.1.
2832 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2836 *** The Landmark game is now invoked with `landmark', not `lm'.
2837 Its functions and variables have been similarly renamed.
2839 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2840 (This interfered with cua-mode.)
2842 *** f90.el has some support for Fortran 2008 syntax.
2844 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2846 *** New command `nato-region' converts text to NATO phonetic alphabet.
2849 * New Modes and Packages in Emacs 24.1
2851 ** Occur Edit mode applies edits made in *Occur* buffers to the
2852 original buffers. It is bound to "e" in Occur mode.
2854 ** New global minor mode electric-pair-mode.
2855 When enabled, typing an open parenthesis automatically inserts the
2856 matching closing one.
2858 ** New global minor mode electric-indent-mode.
2859 When enabled, typing certain characters triggers reindentation.
2860 Major modes wishing to use this can set electric-indent-chars or
2861 electric-indent-functions.
2863 ** New global minor mode electric-layout-mode.
2864 When enabled, typing certain characters automatically inserts newlines.
2865 Major modes wishing to use this can set electric-layout-rules.
2867 ** tabulated-list.el provides a generic major mode for tabulated data,
2868 from which other modes can be derived.
2870 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2872 ** secrets.el is an implementation of the Secret Service API, an
2873 interface to password managers like GNOME Keyring or KDE Wallet. The
2874 Secret Service API requires D-Bus for communication. The command
2875 `secrets-show-secrets' offers a buffer with a visualization of the
2878 ** notifications.el provides an implementation of the Desktop
2879 Notifications API. It requires D-Bus for communication.
2881 ** soap-client.el supports access to SOAP web services from Emacs.
2882 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2884 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
2886 ** New emacs-lock.el package.
2887 The previous version has been moved to obsolete/old-emacs-lock.el.
2888 Now, there is a proper minor mode `emacs-lock-mode'. Protection
2889 against exiting Emacs and killing the buffer can be set separately.
2890 The mechanism for automatically turning off protection for buffers
2891 with dead inferior processes has been generalized.
2894 * Incompatible Lisp Changes in Emacs 24.1
2896 ** Passing a nil argument to a minor mode function call now ENABLES
2897 the minor mode unconditionally. This is so that you can write e.g.
2899 (add-hook 'text-mode-hook 'foo-mode)
2901 to enable foo-mode in Text mode buffers, removing the need for
2902 `turn-on-foo-mode' style functions. This affects all mode commands
2903 defined by `define-minor-mode'. If called interactively, the mode
2904 command still toggles the minor mode.
2906 ** The return value of `backup-buffer' has changed.
2907 It is now a list of three elements, where the second element is a list
2908 describing the original file's SELinux context. If Emacs or the
2909 system lacks SELinux support, the context list is (nil nil nil nil).
2910 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
2912 ** `char-direction-table' and the `char-direction' function were deleted.
2913 They were buggy and inferior to the new support of bidirectional
2914 editing introduced in Emacs 24. If you need the bidirectional
2915 properties of a character, use `get-char-code-property' with the last
2916 argument `bidi-class'.
2918 ** `copy-directory' now copies the source directory as a subdirectory
2919 of the target directory, if the latter is an existing directory. The
2920 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2921 the contents directly into a pre-existing target directory.
2923 ** For mouse click input events in the text area, the Y pixel
2924 coordinate in the POSITION list now counts from the top of the text
2925 area, excluding any header line. Previously, it counted from the top
2928 ** Support for "old-style" backquotes, obsolete for 10+ years, has
2929 been further reduced. Now a backquote not followed by a space is
2930 always treated as a "new-style" backquote. Please remove all
2931 "old-style" backquotes from your code. If your code uses backquotes
2932 as documented in the Elisp manual, and compiles without warning, then
2933 you have nothing to do in this regard. Code not following the
2934 appropriate conventions may fail to compile.
2936 The most common cause of trouble seems to be an old-style backquote
2937 followed by a newline. Another cause of trouble is vector notation
2938 for key sequence notation: instead of [(control ,)] and [(control ')],
2939 you should write [(control ?,)] and [(control ?')], which will work in
2942 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2943 was not advertised at the time. The function `custom-initialize-delay'
2944 replaced all known uses.
2946 ** `view-buffer' now treats special mode-class in the same way that
2947 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2948 major mode is special).
2950 ** Menu and tool bar changes
2952 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
2953 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2954 With these alist entries omitted, `make-frame' checks the value of the
2955 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2956 a menu-bar or tool-bar, respectively. If the alist entries are added,
2957 they override the value of `menu-bar-mode'/`tool-bar-mode'.
2959 *** The menu bar bindings's caches are not used any more.
2960 Use (where-is-internal <def> nil t) instead.
2962 ** Regions created by mouse dragging are now normal active regions,
2963 similar to those created by shift-selection (see Selection changes
2964 above). In previous Emacs versions, these regions were delineated by
2965 `mouse-drag-overlay'; that variable has been removed.
2967 ** The fourth argument of `filter-buffer-substring' has been removed.
2968 If you want to remove text properties from the final result, simply
2969 pass the result through substring-no-properties.
2971 ** cl.el no longer provides `cl-19'.
2973 ** The following obsolete functions and aliases have been removed
2974 (the appropriate new function is given in parentheses; "not needed"
2975 means you can just remove all calls to the function in question):
2977 *** `comint-kill-output' (`comint-delete-output')
2978 *** `decompose-composite-char' (`char-to-string')
2979 *** `outline-visible' (`outline-invisible-p')
2980 *** `internal-find-face' (`facep')
2981 *** `internal-get-face' (`facep and check-face')
2982 *** `frame-update-faces' (not needed)
2983 *** `frame-update-face-colors' (`frame-set-background-mode')
2984 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2985 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2986 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2987 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2988 *** `x-make-font-unbold' (`make-face-unbold')
2989 *** `x-make-font-unitalic' (`make-face-unitalic')
2990 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2991 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2992 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2993 *** `char-bytes' (== 1)
2994 *** `isearch-return-char' (`isearch-printing-char')
2995 *** `make-local-hook' (not needed)
2996 *** `set-screen-height' (`set-frame-height')
2997 *** `set-screen-width' (`set-frame-width')
2999 ** The following obsolete variables and varaliases have been removed
3000 (the appropriate new variable is given in parentheses):
3002 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3003 *** `vc-header-alist' (`vc-BACKEND-header')
3004 *** `directory-sep-char' (== ?/)
3005 *** `font-lock-defaults-alist' (`font-lock-defaults')
3006 *** `e' (`float-e').
3008 ** The following obsolete files were removed:
3009 sc.el, x-menu.el, rnews.el, rnewspost.el
3011 ** The format of the finder-inf.el file has changed, since the Finder
3012 mechanism is now based on the package system. The variable
3013 `finder-package-info' is replaced by `package--builtins' and
3014 `finder-keywords-hash'.
3016 ** When generating autoloads, `update-directory-autoloads' no longer
3017 assumes every inspected file is in your `load-path'. It instead
3018 generates relative names according to the current `load-path'.
3021 * Lisp Changes in Emacs 24.1
3023 ** Code can now use lexical scoping by default instead of dynamic scoping.
3024 The `lexical-binding' variable enables lexical scoping for local
3025 variables. It is typically set via a file-local variable in the first
3026 line of the file, in which case it applies to all the code in that
3029 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3030 binding instead of the old dynamic binding mode.
3032 *** Lexically scoped interpreted functions are represented with a new form
3033 of function value which looks like (closure ENV ARGS &rest BODY).
3035 *** New macro `letrec' to define recursive local functions.
3037 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3038 So do `defcustom' and other forms that call `defvar' as a subroutine.
3040 *** New function `special-variable-p' to check whether a variable is
3041 declared as dynamically bound.
3043 *** The form ((lambda ...) ...) is deprecated.
3045 ** An Emacs Lisp testing tool is now included.
3046 Emacs Lisp developers can use this tool to write automated tests for
3047 their code. See the ERT info manual for details.
3049 ** Changes for bidirectional display and editing
3051 *** New function `current-bidi-paragraph-direction'.
3052 This returns the base direction of the paragraph at point.
3054 *** New function `bidi-string-mark-left-to-right'.
3055 Given a string containing characters from right-to-left scripts, this
3056 function returns another string which can be safely inserted into a
3057 buffer, such that any following text will be always displayed to the
3058 right of that string. (This works by appending an invisible Unicode
3059 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3061 This is useful when the buffer has overall left-to-right paragraph
3062 direction and you need to insert a string whose contents are not known
3063 in advance, without disrupting the layout of the line.
3067 *** Window tree functions are accessible in Elisp.
3068 Functions are provided to return the parent, siblings or child windows
3069 of any window including internal windows (windows not associated with a
3070 buffer) in the window tree.
3072 **** New function `window-valid-p' gives non-nil for live and internal
3075 **** Window manipulation can deal with internal windows.
3076 Many window handling functions like `split-window', `delete-window', or
3077 `delete-other-windows' as well as the window resizing functions can now
3078 act on any window including internal ones.
3080 *** window-total-height/-width vs window-body-height/-width.
3081 The function `window-height' has been renamed to `window-total-height'
3082 and `window-width' has been renamed to `window-body-width'. The old
3083 names are provided as aliases. Two new functions `window-total-width'
3084 and `window-body-height' are provided.
3086 *** Window parameters specific to window handling functions.
3087 For each window you can specify a parameter to override the default
3088 behavior of a number of functions like `split-window', `delete-window'
3089 and `delete-other-windows'. The variable `ignore-window-parameters'
3090 allows to ignore processing such parameters.
3092 *** New semantics of third argument of `split-window'.
3093 The third argument of `split-window' has been renamed to SIDE and can be
3094 set to any of the values 'below, 'right, 'above, or 'left to make the
3095 new window appear on the corresponding side of the window that shall be
3096 split. Any other value of SIDE will cause `split-window' to split the
3097 window into two side-by-side windows as before.
3099 *** Window resizing functions.
3100 A new standard function for resizing windows called `window-resize' has
3101 been introduced. This and all other functions for resizing windows no
3102 longer delete any windows when they become too small.
3104 *** Deleting the selected window now selects the most recently selected
3105 live window on that frame instead.
3107 *** `adjust-window-trailing-edge' adjustments.
3108 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3109 is able to resize other windows if a window adjacent to the trailing
3110 edge cannot be shrunk any more. This makes its behavior more similar to
3111 that of Emacs 21 without compromising, however, its inability to delete
3112 windows which was introduced in Emacs 22.
3114 *** Window-local buffer lists.
3115 Windows now have local buffer lists. This means that removing a buffer
3116 from display in a window will preferably show the buffer previously
3117 shown in that window with its previous window-start and window-point
3118 positions. This also means that the same buffer may be automatically
3119 shown twice even if it already appears in another window.
3121 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3122 which if non-nil requires the buffer to be displayed in the currently
3123 selected window, signaling an error otherwise. If nil, another window
3124 can be used, e.g. if the selected one is strongly dedicated.
3126 *** `split-window-vertically' and `split-window-horizontally' renamed
3127 to `split-window-below' and `split-window-right' respectively.
3128 The old names are kept as aliases.
3132 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3133 named ACTION, and takes a display action of the same form as
3134 `display-buffer-base-action' (see Changes, above). A non-nil,
3135 non-list value is treated specially, as the old meaning.
3137 **** New variable `display-buffer-overriding-action'.
3139 **** The procedure of `display-buffer' etc. to choose a window is
3140 determined by combining `display-buffer-overriding-action',
3141 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3142 and `display-buffer-fallback-action'. The second and fourth of these
3143 are user-customizable variables.
3145 See the docstring of `display-buffer' for details.
3147 *** New functions `window-state-get' and `window-state-put'.
3148 These functions allow to save and restore the state of an arbitrary
3149 frame or window as an Elisp object.
3153 *** New variable `completion-extra-properties' used to specify extra
3154 properties of the current completion:
3155 - :annotate-function, same as the old completion-annotate-function.
3156 - :exit-function, function to call after completion took place.
3158 *** Functions on `completion-at-point-functions' can return any of the
3159 properties valid for `completion-extra-properties'.
3161 *** `completion-annotate-function' is obsolete.
3163 *** New `metadata' method for completion tables. The metadata thus returned
3164 can specify various details of the data returned by `all-completions':
3165 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3166 used to select a style in completion-category-overrides.
3167 - `annotation-function' to add annotations in *Completions*.
3168 - `display-sort-function' to specify how to sort entries in *Completions*.
3169 - `cycle-sort-function' to specify how to sort entries when cycling.
3171 *** `minibuffer-local-filename-must-match-map' is not used any more.
3172 Instead, the bindings in `minibuffer-local-filename-completion-map'
3173 are combined with `minibuffer-local-must-match-map'.
3175 *** New variable `completing-read-function' allows overriding the
3176 behavior of `completing-read'.
3178 ** `glyphless-char-display' can now distinguish between graphical and
3179 text terminal display, via a char-table entry that is a cons cell.
3181 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3182 Instead, the offending function is removed.
3186 *** New function `run-hook-wrapped' for running an abnormal hook by
3187 passing the hook functions as arguments to a "wrapping" function.
3188 Like `run-hook-with-args-until-success', it stops at the first
3189 non-nil return value.
3191 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3192 set of "wrapping" filters, similar to around advice.
3193 (A version of this macro was actually added in Emacs 23.2 but was not
3194 advertised at the time.)
3198 *** New macro `condition-case-unless-debug' (this was actually added in
3199 Emacs 23.1 as condition-case-no-debug, but not advertised)
3201 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3203 *** Variable `stack-trace-on-error' removed.
3205 *** The debugger can now "continue" from an error, which means it will
3206 jump to the error handler as if the debugger had not been invoked
3207 instead of jumping all the way to the top-level.
3209 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3210 This can be useful when `inhibit-quit' is set.
3212 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3213 named Emacs server instances.
3215 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3216 to redirect STDOUT to a file.
3218 ** The function `format-time-string' now supports the %N directive,
3219 for higher-resolution time stamps.
3221 ** New input reading functions
3223 *** New function `read-char-choice' reads a restricted set of
3224 characters, discarding any inputs not inside the set.
3226 *** The command `read-color' now requires a match for a color name
3227 or RGB triplet, instead of signaling an error if the user provides
3230 **** `facemenu-read-color' is now an alias for `read-color'.
3232 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3233 The variable is now used to load all kind of supported dynamic libraries,
3234 not just image libraries. The previous name is still available as an
3237 ** Syntax parsing changes
3239 *** New variable `syntax-propertize-function'.
3240 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3241 This allows syntax-table properties to be set independently from font-lock:
3242 just call syntax-propertize to make sure the text is propertized.
3243 Together with this new variable come a new hook
3244 syntax-propertize-extend-region-functions, as well as two helper functions:
3245 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3246 as-is; and syntax-propertize-rules which provides a new way to specify
3249 *** Syntax tables support a new "comment style c" additionally to style b.
3251 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3253 ** frame-local variables cannot be let-bound any more.
3255 ** Major and minor mode changes
3257 *** `set-auto-mode' now respects mode: local variables at the end of files,
3258 as well as those in the -*- line.
3260 *** `prog-mode' is a new major mode from which programming modes
3263 **** `prog-mode-hook' can be used to enable features for programming
3264 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3265 on-the-fly spell checking for comments and strings.
3267 **** New minor modes `prettify-symbols-mode' and
3268 `global-prettify-symbols-mode' let the user enable symbol
3269 prettification (replacing a string like "lambda" with the Greek lambda
3272 *** New hook `change-major-mode-after-body-hook', run by
3273 `run-mode-hooks' just before any other mode hooks.
3275 *** Enabled globalized minor modes can be disabled in specific major modes.
3276 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3277 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3279 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3281 ** File-handling changes
3283 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3284 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3285 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3286 argument is supplied (see Trash changes, above).
3288 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3290 ** Tool-bars can display separators.
3291 Tool-bar separators are handled like menu separators in menu-bar maps,
3292 i.e. via menu entries of the form `(menu-item "--")'.
3296 *** Animated images support (currently animated gifs only).
3298 **** `image-animated-p' returns non-nil if an image can be animated.
3300 **** `image-animate' animates a supplied image spec.
3302 **** `image-animate-timer' returns the timer object for an image that
3305 *** `image-extension-data' has been renamed to `image-metadata'.
3306 The old name is an obsolete alias to the new one.
3308 *** Image mode can view any image type that ImageMagick supports.
3309 This requires Emacs to be built with ImageMagick support.
3311 **** New function `imagemagick-types', defined if ImageMagick support
3312 is enabled, returns a list of image file extensions that your
3313 ImageMagick installation supports.
3315 **** New function `imagemagick-register-types' enables ImageMagick
3316 image types in Image mode and in `create-image' and other helper
3319 **** New option `imagemagick-types-inhibit' excludes certain
3320 ImageMagick image types from `imagemagick-register-types'.
3322 **** With ImageMagick support, there are extra Image mode commands to
3323 resize and rotate images: `image-transform-fit-to-height',
3324 `image-transform-fit-to-width', `image-transform-set-rotation', and
3325 `image-transform-set-scale'.
3327 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3328 passes it to the mail user agent function. This argument specifies an
3329 action for returning to the caller after finishing with the mail. For
3330 example, this is used by Rmail to optionally delete a mail window.
3332 ** XML and HTML parsing
3333 If Emacs is compiled with libxml2 support, there are two new
3334 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3335 and `libxml-parse-xml-region' (which parses XML). Both return an
3336 Emacs Lisp parse tree.
3338 ** Networking and encryption changes
3340 *** `open-network-stream' can now be used to open an encrypted stream.
3341 It now accepts an optional `:type' parameter for initiating a TLS
3342 connection, directly or via STARTTLS. To do STARTTLS, additional
3343 parameters (`:end-of-command', `:success', `:capabilities-command')
3344 must also be supplied.
3346 *** New library gnutls.el.
3347 The new function `gnutls-available-p' returns non-nil if Emacs is
3348 built with GnuTLS support. The main entry points are
3349 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3350 these functions through `open-network-stream', because that can
3351 upgrade connections through STARTTLS opportunistically or use plain
3352 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3355 *** New primitive `secure-hash' that supports many secure hash algorithms:
3356 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3357 sha1.el has been removed. The `sha1' feature is provided by default.
3361 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3363 ** Progress reporters can now "spin".
3364 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3365 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3366 time you call `progress-reporter-update' on that progress reporter,
3367 with a nil or omitted VALUE argument, the reporter message is
3368 displayed with a "spinning bar".
3370 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3371 being reverted, even if the buffer has a local `revert-buffer-function'.
3373 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3374 If delayed-warnings-list is non-nil, the command loop calls
3375 `delayed-warnings-hook' after `post-command-hook'. At present, this
3376 is only used by Emacs on some platforms to display warnings during
3377 startup, which might otherwise not be noticed. This uses the
3378 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3380 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3382 ** New function `make-composed-keymap' that constructs a new keymap
3383 from multiple input maps. You can use this to make a keymap that
3384 inherits from multiple maps, eg:
3385 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3387 ** New function `string-prefix-p'.
3388 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3390 ** New reader macro ## that stands for the empty symbol.
3391 This means that the empty symbol can now be read back. Also, #: by itself
3392 (when not immediately followed by a possible symbol character) stands for
3393 an empty uninterned symbol.
3395 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3397 ** The following functions and variables are obsolete:
3399 *** `tooltip-use-echo-area' is obsolete.
3400 Rather than setting this to t, disable Tooltip mode instead.
3402 *** buffer-substring-filters is obsolete.
3403 Use `filter-buffer-substring-functions' instead.
3405 *** `byte-compile-disable-print-circle' is obsolete.
3407 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3408 Use `post-command-hook' instead.
3410 *** `font-lock-maximum-size' is obsolete.
3413 * Changes in Emacs 24.1 on Non-Free Operating Systems
3415 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3416 and also when HOME is set to C:\ by default.
3418 ** New configure.bat options
3420 *** --enable-checking builds Emacs with extra runtime checks.
3422 *** --distfiles specifies files to be included in binary distribution.
3424 *** --without-gnutls disables automatic GnuTLS detection.
3426 *** --lib for general library linkage, works with the USER_LIBS build variable.
3428 ** New make target `dist' to create binary distribution for MS Windows.
3430 ** The Lisp function `w32-default-color-map' is now obsolete.
3431 (It is only used internally in the Emacs C code.)
3433 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3434 reappear on mouse-over. (Requires OS X 10.6 or later.)
3436 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3437 other platforms, rather than inserting its contents into the buffer.
3440 ----------------------------------------------------------------------
3441 This file is part of GNU Emacs.
3443 GNU Emacs is free software: you can redistribute it and/or modify
3444 it under the terms of the GNU General Public License as published by
3445 the Free Software Foundation, either version 3 of the License, or
3446 (at your option) any later version.
3448 GNU Emacs is distributed in the hope that it will be useful,
3449 but WITHOUT ANY WARRANTY; without even the implied warranty of
3450 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3451 GNU General Public License for more details.
3453 You should have received a copy of the GNU General Public License
3454 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3459 paragraph-separate: "[
\f]*$"