1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2014 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 documentation updates are complete.
19 (This means all relevant manuals in doc/ AND lisp doc-strings.)
20 --- means no change in the manuals is needed.
21 When you add a new item, use the appropriate mark if you are sure it applies,
22 otherwise leave it unmarked.
25 * Installation Changes in Emacs 24.5
28 * Startup Changes in Emacs 24.5
31 * Changes in Emacs 24.5
34 ** The default value of `history-length' has increased to 100.
37 * Editing Changes in Emacs 24.5
40 * Changes in Specialized Modes and Packages in Emacs 24.5
43 ** The Rmail commands d, C-d and u now handle repeat counts
44 to delete or undelete multiple messages.
47 * New Modes and Packages in Emacs 24.5
50 * Incompatible Lisp Changes in Emacs 24.5
53 * Lisp Changes in Emacs 24.5
56 ** You can specify a function's interactive-only property via `declare'.
59 * Changes in Emacs 24.5 on Non-Free Operating Systems
62 * Installation Changes in Emacs 24.4
65 ** Emacs can now be compiled with ACL support.
66 This happens by default if a suitable support library is found at
67 build time, like libacl on GNU/Linux. To prevent this, use the
68 configure option `--disable-acl'. See below for related features.
71 ** Emacs can now be compiled with file notification support.
72 This happens by default if a suitable system library is found at
73 build time. To prevent this, use the configure option
74 `--without-file-notification'. See below for file-notify features.
75 This feature is not available for the Nextstep port.
78 ** Emacs can now be compiled with zlib support.
79 This happens by default if zlib is present, which it normally is.
80 To prevent this, use the configure option `--without-zlib'.
81 This provides the function `zlib-decompress-region'; see below for details.
84 ** The configure option `--without-compress-info' has been generalized,
85 and renamed to `--without-compress-install'. It now prevents compression
86 of _any_ files during installation.
89 ** The configure option `--with-crt-dir' has been removed.
90 It is no longer needed, as the crt*.o files are no longer linked specially.
93 ** Directories passed to configure option `--enable-locallisppath' are
94 no longer created during installation.
97 ** Emacs for NS (Mac OS X, GNUstep) can be built with ImageMagick support.
98 This requires pkg-config to be available at build time.
101 * Startup Changes in Emacs 24.4
104 ** When initializing `load-path', an empty element in the EMACSLOADPATH
105 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
106 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
107 load-path (the one that would have been used if EMACSLOADPATH was unset).
108 This makes it easier to _extend_ the load-path via EMACSLOADPATH
109 (previously, EMACSLOADPATH had to specify the complete load-path,
110 including the defaults). (In older versions of Emacs, an empty element
111 was replaced by ".", so use an explicit "." now if that is what you want.)
114 ** The -L option, which normally prepends its argument to load-path,
115 will instead append, if the argument begins with `:' (or `;' on MS Windows;
116 i.e., `path-separator').
119 ** If you use either site-load.el or site-init.el to customize the dumped
120 Emacs executable, any changes to `load-path' that these files make
121 will no longer be present after dumping. To affect a permanent change
122 to `load-path', use the `--enable-locallisppath' option of `configure'.
125 ** The user option `initial-buffer-choice' can now specify a function
126 to set up the initial buffer.
129 * Changes in Emacs 24.4
132 ** New function `zlib-decompress-region', which decompresses gzip- and
133 zlib-format compressed data using built-in zlib support, if available.
136 ** New option `gnutls-verify-error', if non-nil, means that Emacs
137 should reject SSL/TLS certificates that GnuTLS determines as invalid.
138 (This option defaults to nil at present, but this is expected to change
139 in a future release.)
142 ** Emacs now supports menus on text-mode terminals.
143 If the terminal supports a mouse, clicking on the menu bar, or on
144 sensitive portions of the mode line or header line, will drop down the
145 menu defined at that position. Likewise, clicking C-mouse-2 or
146 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
149 If the text terminal does not support a mouse, you can activate the
150 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
152 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
153 customize the option `tty-menu-open-use-tmm' to a non-nil value.
154 (Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
158 ** The *Messages* buffer is created in `messages-buffer-mode',
159 a new major mode, with read-only status. Any code that might create
160 the *Messages* buffer should call the function `messages-buffer' to do
161 so and set up the mode.
164 ** Emacs can now support ACLs (access control lists).
165 This requires a suitable support library to be found at build time.
166 On GNU/Linux, the POSIX ACL interface is used via libacl.
167 On MS-Windows, the NT Security APIs are used to emulate the POSIX interface.
170 *** Emacs preserves the ACL entries of files when backing up.
172 *** New functions `file-acl' and `set-file-acl' get and set the ACL
175 ** Multi-monitor support has been added.
178 *** New functions `display-monitor-attributes-list' and
179 `frame-monitor-attributes' can be used to obtain information about
180 each physical monitor on multi-monitor setups.
183 *** The functions `display-pixel-width' and `display-pixel-height' now
184 behave consistently among the platforms: they return the pixel width
185 or height for all physical monitors associated with the given display
186 as if they were on X. To get information for each physical
187 monitor, use the new functions above. Similar notes also apply to
188 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
189 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
192 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
193 You can change the default by customizing `blink-cursor-blinks'.
196 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
197 This affects View mode, etc.
202 *** The command `apropos-variable' is renamed to `apropos-user-option'.
203 `apropos-user-option' shows all user options while `apropos-variable'
204 shows all variables. When called with a universal prefix argument,
205 the two commands swap their behaviors. When `apropos-do-all' is
206 non-nil, they output the same results.
209 *** The key `?' now describes prefix bindings, like `C-h'.
212 *** The command `describe-function' has been extended for EIEIO.
213 Running it on constructors will show a full description of the
214 generated class. For generic functions, it will show all
215 implementations together with links to the source. The old commands
216 `describe-class', `describe-constructor' and `describe-generic' were
220 *** The function `quail-help' is no longer an interactive command.
221 Use `C-h C-\' (`describe-input-method') instead.
226 *** ImageMagick images now support the :max-width and :max-height keywords.
229 *** When using `create-image' with image data, you can pass a :format
230 attribute (via the property-list argument) in order to help
231 ImageMagick detect the image type. The value should be a MIME
232 content-type that is found in the new variable `image-format-suffixes'.
234 ** Frame and window changes
237 *** The function `window-in-direction' introduced in Emacs 24.1 now
238 takes additional arguments for specifying a reference point, wrapping
239 selection around frame borders, and specifying ways to select the
243 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
244 bound to <f11> and M-<f10>, respectively.
247 *** New hooks `focus-in-hook', `focus-out-hook'.
248 These are normal hooks run when an Emacs frame gains or loses input focus.
251 *** Emacs can now change frame sizes in units of pixels, rather than
252 text rows or columns. When maximizing a frame or making it fullscreen,
253 remaining extra pixels are no longer given to the minibuffer, the rightmost
254 fringe, or other unusable space, but are distributed among the text
255 areas of the frame's windows. If the new option `frame-resize-pixelwise'
256 is non-nil, all frame size changes happen pixelwise and set the
257 corresponding size hints for the window manager.
260 *** Emacs can now change window sizes in units of pixels.
261 Mouse-dragging a mode line or window divider now changes the size of
262 adjacent windows pixelwise. If the new option `window-resize-pixelwise'
263 is non-nil, functions like `balance-windows-area' and `fit-window-to-buffer'
264 resize windows pixelwise. Most functions for changing or accessing
265 window sizes now have an additional argument that allows changes to apply,
266 or values to be returned, in pixels instead of lines/columns.
269 *** The functions `window-body-height' and `window-body-width' now never
270 count partially visible lines or columns if called with a nil PIXELWISE
274 *** Emacs can now draw dividers between adjacent windows. To put
275 dividers between side-by-side/vertically stacked windows customize the
276 frame parameters `right-divider-width' and `bottom-divider-width' to
277 some positive integer. You can drag dividers with the mouse (they show
278 a corresponding cursor when the mouse hovers over them). You can change
279 the appearance of dividers by customizing the faces `window-divider',
280 `window-divider-first-pixel', and `window-divider-last-pixel'. The last
281 two are useful to provide a 3D effect, or to better distinguish dividers
282 from surrounding display objects.
285 *** New functions are provided to return the pixel sizes of window
286 components, namely `window-scroll-bar-width', `window-mode-line-height'
287 `window-header-line-height', `window-right-divider-width' and
288 `window-bottom-divider-width'.
291 *** The new function `window-text-pixel-size' returns the size of the
292 text of a window's buffer in pixels. This allows functions like
293 `fit-frame-to-buffer' and `fit-window-to-buffer' to accurately fit a
294 window to its buffer as it will be displayed.
297 *** `fit-window-to-buffer' can now resize windows in both dimensions.
298 This behavior is controlled by the new option
299 `fit-window-to-buffer-horizontally'. The new option
300 `fit-frame-to-buffer' allows to fit the window's frame to its buffer.
303 *** `fit-frame-to-buffer' now fits frames in both dimensions. The new
304 options `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes'
305 control the size of the frame and its position on screen.
308 *** Temp Buffer Resize Mode can now adjust height and width of windows
309 and frames. `temp-buffer-resize-mode' is now able to adjust the height
310 and the width of a window displaying a temporary buffer. The new option
311 `temp-buffer-max-width' allows to control the width of temporary buffer
312 windows. Moreover, if the new option `fit-frame-to-buffer' is non-nil
313 and the buffer appears in the root window of a frame, Temp Buffer Resize
314 Mode will try to adjust width and/or height of the frame.
317 *** `split-window' is now a non-interactive function, not a command.
318 As a command, it was a special case of `C-x 2' (`split-window-below'),
319 and as such superfluous. After being reimplemented in Lisp, its
320 interactive form was mistakenly retained.
323 *** The functions `window-size' and `window-total-size' now have an
324 optional argument to return a rounded size value.
327 *** `window-state-put' now allows to put a window state into internal
331 *** New option `scroll-bar-adjust-thumb-portion'.
332 Available only on X, this option allows to control over-scrolling
333 using the scroll bar (i.e. dragging the thumb down even when the end
334 of the buffer is visible).
337 *** New basic action function `display-buffer-in-previous-window' has
338 `display-buffer' display a buffer in a window previously showing that
342 *** New basic action function `display-buffer-at-bottom' has
343 `display-buffer' choose or make a window at the bottom of the selected
347 *** New display action function `display-buffer-no-window' to not
348 display the buffer in a window.
351 *** New display action alist entry `allow-no-window' to indicate the
352 caller of `display-buffer' is ready to handle the case of not
353 displaying the buffer in a window.
355 ** Lisp evaluation changes
357 *** `eval-defun' on an already defined defcustom calls the :set function,
361 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
362 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
363 zero prefix argument. This disables truncation of lists in the output,
364 equivalent to setting `(eval-expression-)print-length' and
365 `(eval-expression-)print-level' to nil. Additionally, it causes integers
366 to be printed in other formats (octal, hexadecimal, and character).
369 *** New hook `eval-expression-minibuffer-setup-hook' run by
370 `eval-expression' on entering the minibuffer.
373 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
376 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
377 because it affects caching of paragraph scanning results as well.
378 There is no reason to set this to nil except for debugging purposes.
381 ** The option `set-mark-default-inactive' has been deleted.
382 This unfinished feature was introduced by accident in Emacs 23.1;
383 simply disabling Transient Mark mode does the same thing.
386 ** The default value of `comment-use-global-state' is now t,
387 and this variable has been marked obsolete.
390 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
391 and works for git too, if you fetch the repository notes.
394 ** New option `load-prefer-newer' affects how the `load' function chooses
395 the file to load. If this is non-nil, then when both .el and .elc
396 versions of a file exist, and the caller did not explicitly specify
397 which one to load, then the newer file is loaded. The default, nil,
398 means to always load the .elc file.
401 * Editing Changes in Emacs 24.4
403 ** Indentation changes
406 *** `electric-indent-mode' is now enabled by default.
407 E.g., typing RET reindents the current line and indents the new line.
408 `C-j' inserts a newline but does not indent.
411 *** New buffer-local `electric-indent-local-mode'.
414 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
415 When invoked without a prefix argument, it now activates a transient
416 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
417 the text indentation in the region. Typing any other key resumes
418 normal editing behavior.
421 *** `tab-stop-list' is now implicitly extended to infinity by repeating
422 the last step. Its default value is changed to nil, which means a tab
423 stop every `tab-width' columns.
426 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
427 When called in succession, it cycles between spacing conventions:
428 one space, no spaces, original spacing.
431 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
432 a line after a one-letter word, which is an error in some typographical
433 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
436 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
439 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
440 Most commands are still unaware of it, but kill/yank do work on the rectangle.
443 ** New option `visual-order-cursor-movement'.
444 If this is non-nil, cursor motion with arrow keys will follow the
445 visual order of characters on the screen: <left> always moves to the
446 left, <right> always moves to the right, disregarding the surrounding
447 bidirectional context.
452 *** All interactive commands that read a register (`copy-to-register', etc.)
453 now display a temporary window after `register-preview-delay' seconds
454 that summarizes existing registers. To disable this, set that option to nil.
455 Interactive commands that read registers and want to make use of this
456 should use `register-read-with-preview' to read register names.
459 *** New command `frameset-to-register' bound to `C-x r f', replacing
460 `frame-configuration-to-register'. It offers similar functionality,
461 plus enhancements like the ability to restore deleted frames.
462 (`frame-configuration-to-register' still exists, but no longer has a
466 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
470 ** New command `delete-duplicate-lines'.
471 This searches the region for identical lines, and removes all but one
472 copy of each repeated line. The lines need not be sorted.
475 ** `blink-matching-paren' now only highlights the matching open-paren
476 by default, instead of moving cursor. Set this variable to `jump' to
477 enable the old behavior.
480 * Changes in Specialized Modes and Packages in Emacs 24.4
483 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
485 ~/.emacs.d/timelog replaces ~/.timelog
486 ~/.emacs.d/vip replaces ~/.vip
487 ~/.emacs.d/viper replaces ~/.viper
488 ~/.emacs.d/ido.last replaces ~/.ido.last
489 ~/.emacs.d/kkcrc replaces ~/.kkcrc
490 ~/.emacs.d/quickurls replaces ~/.quickurls
491 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
492 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
493 ~/.emacs.d/places replaces ~/.emacs-places
494 ~/.emacs.d/shadows replaces ~/.shadows
495 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
496 ~/.emacs.d/strokes replaces ~/.strokes
497 ~/.emacs.d/notes replaces ~/.notes
498 ~/.emacs.d/type-break replaces ~/.type-break
499 Also the following files used by the now obsolete otodo-mode.el:
500 ~/.emacs.d/todo-do replaces ~/.todo-do
501 ~/.emacs.d/todo-done replaces ~/.todo-done
502 ~/.emacs.d/todo-top replaces ~/.todo-top
504 ** Backtrace and debugger
507 *** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
508 display of local variables of the current stack frame.
511 *** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
512 the lexical environment when evaluating the code in the context at point
513 (and so allows you to access lexical variables).
516 *** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
519 ** Battery information can now be retrieved from BSD's `apm' utility.
522 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
524 ** Calendar and Diary
527 *** New faces `calendar-weekday-header', `calendar-weekend-header',
528 and `calendar-month-header'.
531 *** New option `calendar-day-header-array'.
534 *** New variable `diary-from-outlook-function', used by the command
535 `diary-from-outlook'.
538 *** The variable `calendar-font-lock-keywords' is obsolete.
543 *** Calc by default now uses the Gregorian calendar for all dates, and
544 uses January 1, 1 AD as its day number 1. Previously Calc used the
545 Julian calendar for dates before September 14, 1752, and it used
546 December 31, 1 BC as its day number 1; the new scheme is more
547 consistent with Calendar's calendrical system and day numbering.
550 *** The new option `calc-gregorian-switch' lets you configure if
551 (and when) Calc switches from the Julian to the Gregorian calendar.
554 *** Support for ISO 8601 dates.
561 **** The cpp-root project now supports executing a compile command.
562 It can be set through the new :compile-command slot or the
563 buffer-local variable `compile-command'.
566 **** Better selection of include directories for the 'linux' project.
567 Include directories now support out-of-tree build directories and
568 target architecture auto-detection.
573 **** Improved detection of used namespaces in current scope in C++.
575 **** Parsing of default values for variables and function arguments in C/C++.
576 They are also displayed by the summarize feature in the mode line.
578 **** Improved parsing of function pointers in C/C++.
579 This also includes parsing of function pointers as function arguments.
581 **** Parsing of C/C++ preprocessor macros that open new scope.
582 For example, this enables parsing of macros that open new namespaces.
584 **** Support for 'this' pointer in inline member functions in C++.
589 *** New macro `cl-tagbody'.
590 This executes statements while allowing for control transfer to labels.
593 *** letf is now just an alias for cl-letf.
598 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
599 Hence, you can now enable it independently from those modes, and from
600 `transient-mark-mode'.
603 *** `cua-highlight-region-shift-only' is now obsolete.
604 You can disable `transient-mark-mode' to get the same result.
607 *** CUA's rectangles can now be used without CUA by calling the command
608 `cua-rectangle-mark-mode'.
613 *** Support for completion, ElDoc, and Flycheck has been added.
616 *** The current CFEngine syntax is parsed from "cf-promises -s json".
617 There is a fallback syntax available if you don't have cf-promises or
618 if your version doesn't support that option. See option `cfengine-cf-promises'.
621 ** Delete Selection mode can now be used without Transient Mark mode.
626 *** `desktop-save-mode' by default now auto-saves an existing desktop file
627 after `desktop-auto-save-timeout'. To disable this, customize that option
631 *** Desktop now saves and restores the frame/window configuration.
632 To disable this, set `desktop-restore-frames' to nil.
633 See also related options `desktop-restore-reuses-frames',
634 `desktop-restore-in-current-display', and `desktop-restore-forces-onscreen'.
637 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
638 such as file ownership or permissions, are visible.
641 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
642 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
643 The results display in the mode line.
645 ** Electric Pair mode
648 *** New option `electric-pair-preserve-balance', enabled by default.
649 If non-nil, pairing/skipping only kicks in when that help the balance
650 of parentheses and quotes, i.e. the buffer should end up at least as
653 You can further control this behavior by adjusting the predicates
654 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
657 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
658 In `electric-pair-mode', the commands `backward-delete-char' and
659 `backward-delete-char-untabify' are now bound to electric variants
660 that delete the closer when invoked between adjacent pairs.
663 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
664 In `electric-pair-mode', inserting a newline between adjacent pairs
665 opens an extra newline after point, which is indented if
666 `electric-indent-mode' is also set.
669 *** New option `electric-pair-skip-whitespace', enabled by default.
670 This controls if skipping over closing delimiters should jump over any
671 whitespace slack. Setting it to `chomp' makes it delete this
672 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
675 *** New variables control the pairing in strings and comments.
676 You can customize `electric-pair-text-pairs' and
677 `electric-pair-text-syntax-table' to tweak pairing behavior inside
678 strings and comments.
681 ** New EPA option `epa-mail-aliases'.
682 You can set this to a list of email address aliases that `epa-mail-encrypt'
683 should use to find keys.
686 ** New ERC option `erc-accidental-paste-threshold-seconds'.
687 If set to a number, this can be used to avoid accidentally pasting large
688 amounts of data into the ERC input.
691 ** New ERT macro `skip-unless' allows skipping ERT tests.
692 See the ERT manual for details.
697 *** `eshell' now supports visual subcommands and options.
698 Eshell has been able to handle "visual" commands (interactive,
699 non-line oriented commands such as top that require display
700 capabilities not provided by eshell) by running them in an Emacs
701 terminal emulator. See `eshell-visual-commands'.
703 This feature has been extended to subcommands and options that make a
704 usually line-oriented command a visual command. Typical examples are
705 "git log" and "git <command> --help", which display their output in a
706 pager by default. See `eshell-visual-subcommands' and
707 `eshell-visual-options'.
710 *** New Eshell-Tramp module.
711 External su and sudo commands are now the default; the internal,
712 Tramp-using variants can still be used by enabling the eshell-tramp
716 ** New F90 mode option `f90-smart-end-names'.
719 Icomplete is now more similar to Ido.
722 *** Icomplete by default now applies to all forms of minibuffer completion.
723 The variable `icomplete-with-completion-tables' (now a user option)
724 controls this. To restore the old behavior, set it back to
725 '(internal-complete-buffer).
728 *** You can navigate through and select completions using the keys
729 from `icomplete-minibuffer-map'.
732 *** The string that separates potential completions is now a customizable
733 option (`icomplete-separator'). The default is " | " rather than ",".
736 *** New face `icomplete-first-match'; and new options
737 `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
740 *** The option `icomplete-show-key-bindings' has been removed.
745 *** An Ido user manual is now included.
748 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
749 This means to use virtual buffers if the current ido input does not match
753 *** The variable `ido-decorations' can optionally have two new elements,
754 which are the brackets to use around the sole remaining completion.
759 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
760 visit the next image file and the previous image file in the same
761 directory, respectively.
764 *** New commands to show specific frames of multi-frame images.
765 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
766 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
769 *** New commands to speed up, slow down, or reverse animation.
770 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
771 speed up and slow down the animation. `a r' (`image-reverse-speed')
772 to reverse it and `a 0' (`image-reset-speed') to reset it.
775 *** The command `image-mode-fit-frame' deletes other windows.
776 When toggling, it restores the frame's previous window configuration.
777 It also has an optional frame argument, which can be used by Lisp
778 callers to fit the image to a frame other than the selected frame.
783 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
784 the symbol found near point.
787 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
788 will cycle through faces in `hi-lock-face-defaults' without prompting.
791 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
796 *** New Info face `info-index-match', used to highlight matches in index
797 entries displayed by `Info-index-next', `Info-virtual-index' and
801 *** The Info-edit command is obsolete. Editing Info nodes by hand
802 has not been relevant for some time.
807 *** New option `js-switch-indent-offset'.
810 *** Better indentation of multiple-variable declarations.
811 If a declaration spans several lines, variables on the following lines
812 are lined up to the first one.
815 *** Recognition and better indentation of continuations in array comprehensions.
818 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
823 *** Font locking for Texinfo comments and new keywords.
825 *** Completion in Octave file buffers.
829 *** Jump to definition.
831 *** Documentation lookup/search.
834 ** OPascal mode is the new name for Delphi mode
837 *** All delphi-* variables and functions have been renamed to opascal-*.
838 Obsolete aliases exist for those likely to have been used externally.
841 *** The option `delphi-newline-always-indents' has been removed.
842 Use `electric-indent-mode' instead.
845 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
850 *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
851 to filter the list of packages by a keyword.
854 *** In the `describe-package' buffer, there are now buttons listing the
855 keywords related to the package. Click on a button to see other packages
856 related to that keyword.
859 *** The format of `archive-contents' files, generated by package
860 repositories, has changed to allow a new (fifth) element in the data
861 vectors, containing an associative list with extra properties.
862 (For example, `describe-package' uses the `:url' extra property to
863 display a "Homepage" header.)
866 ** In Prolog mode, `prolog-use-smie' has been removed,
867 along with the non-SMIE indentation code.
872 *** The new command `remember-notes' creates a buffer that is saved on exit.
873 You can use it as a more permanent *scratch* buffer.
876 *** Remember can now store notes in separate files.
877 To use this, add `remember-store-in-files' to the `remember-handler-functions'
878 option. The files are saved in `remember-data-directory' using
879 names specified by `remember-directory-file-name-format'.
884 *** Customize `rmail-mbox-format' to influence some minor aspects of
885 how Rmail displays non-MIME messages.
888 *** The `unrmail' command now converts from BABYL to mboxrd format,
889 rather than mboxo. Customize `unrmail-mbox-format' to change this.
894 *** Improved syntax highlighting and indentation.
897 *** New `electric-indent-mode' integration.
900 *** New option `ruby-encoding-magic-comment-style'.
903 *** New option `ruby-custom-encoding-magic-comment-template'.
906 *** New option `ruby-align-to-stmt-keywords'.
909 *** New option `ruby-align-chained-calls'.
912 *** More Ruby file types have been added to `auto-mode-alist'.
914 ** Search and Replace
917 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
918 starts a symbol (identifier) incremental search forward with the
919 symbol found near point added to the search string initially.
922 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
923 and adds it to the search string.
926 *** `M-s i' in Isearch mode toggles whether search matches invisible text.
929 *** `query-replace' skips invisible text when `search-invisible' is nil,
930 and opens overlays with hidden text when `search-invisible' is `open'.
933 *** A negative prefix arg of replacement commands replaces backward.
934 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
935 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
938 *** By default, prefix arguments do not now terminate Isearch mode.
939 Set `isearch-allow-prefix' to nil to restore old behavior.
942 *** More Isearch commands accept prefix arguments, namely
943 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
947 *** Word search now matches whitespace at the beginning/end
948 of the search string if it contains leading/trailing whitespace.
949 In an incremental word search or when using a non-nil LAX argument
950 of `word-search-regexp', the lax matching can also match part of
951 the first word (in addition to the lax matching of the last word).
952 The same rules are now applied to the symbol search with the difference
953 that it matches symbols, and non-symbol characters between symbols.
956 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
959 ** The shell.el option `explicit-bash-args' includes --noediting by default.
960 All non-ancient Bash versions support this option.
965 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
968 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
973 *** You can customize the SMIE indentation of a mode via `smie-config'.
974 The command `smie-config-guess' can help you derive the appropriate
975 indentation settings, if you provide it with an indented sample file.
976 Use `smie-config-save' to save the result.
979 *** You can customize the SMIE indentation of a file by adding an entry to
980 the file's local variables of the form: `eval: (smie-config-local '(RULES))'.
983 *** New commands `smie-config-show-indent' and `smie-config-set-indent'.
988 *** Improved login monitoring and appropriate response to login failures.
989 New variable `sql-login-delay' defines maximum wait time for a connection.
992 SQL*Plus script placeholders are properly highlighted and identified
993 in `sql-placeholders-filter'. When starting SQL*Plus, `sql-oracle-options'
994 are passed before the logon parameter, as required. The default now
995 includes `-L', to limit the number of logon attempts per invocation.
998 ** New Term mode option `term-suppress-hard-newline'.
1001 ** Todo mode has been rewritten and enhanced.
1002 The Todo mode user manual describes all commands and most user
1003 options. To support some of these features, a new file format is
1004 used, which is incompatible with the old format; however, you can
1005 convert old todo and done item files to the new format on initializing
1006 the first new todo file, or at any later time with the provided
1007 conversion command. The previous version of todo-mode.el has been
1008 renamed to otodo-mode.el and is now obsolete. New features include:
1010 *** Support for multiple todo files and archive files of done items.
1012 *** Renaming, reordering, moving, merging, and deleting categories.
1014 *** Sortable tabular summaries of categories and the item types they contain.
1016 *** Cross-category lists of items filtered by specific criteria.
1018 *** More fine-grained interaction with the Emacs diary, by being able to
1019 decide for each todo item whether it appears in the Fancy Diary display.
1021 *** Highly flexible new item insertion and item editing.
1023 *** Moving items between categories, storing done items in their category
1024 or in archive files, undoing or unarchiving done items.
1026 *** Reprioritizing items by inputting a numerical priority.
1028 *** Extensive customizability of operation and display, including many faces.
1033 *** `trace-function' and `trace-function-background' no longer prompt for
1034 the output buffer. Unless you use a prefix argument, they output to
1038 *** With a prefix argument, `trace-function' and `trace-function-background'
1039 will prompt for a "context". This is a Lisp expression, whose value at the
1040 time the function is entered/exited is printed along with the function's
1046 *** The experimental url syntax for remote file names has been removed.
1049 *** New connection method "adb", which allows to access Android
1050 devices by the Android Debug Bridge. The variable `tramp-adb-program'
1051 can be used to adapt the path of the "adb" program, if needed.
1054 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
1055 "scpc" and "rsyncc" are discontinued. The ssh option
1056 "ControlMaster=auto" is set automatically in all ssh-based methods,
1057 when possible. See `tramp-use-ssh-controlmaster-options'.
1060 *** Handlers for `file-acl' and `set-file-acl' for remote machines
1061 which support POSIX ACLs.
1064 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
1065 for remote machines which support filesystem notifications.
1068 ** New URL command `url-cookie-list' displays the current cookies,
1069 and allows you to interactively remove cookies.
1071 ** VC and related modes
1074 *** In VC directory mode, `D' displays diffs between VC-controlled
1075 whole tree revisions.
1078 *** In VC directory mode, `L' lists the change log for the current VC
1079 controlled tree in a window.
1082 *** In VC directory mode, `I' shows a log of changes that will be
1083 received with a pull operation.
1086 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
1087 under current version control system. When called with a prefix
1088 argument, you can remove a file from the ignored file list.
1093 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
1096 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
1099 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
1100 are obsolete. Customize the `woman-*' faces instead.
1102 ** Obsolete packages
1105 *** iswitchb.el; use icomplete-mode.
1108 *** longlines.el; use visual-line-mode.
1117 *** terminal.el; use term.el instead.
1120 *** the old version of todo-mode.el (renamed to otodo-mode.el).
1123 *** xesam.el (owing to the cancellation of the XESAM project).
1126 *** yow.el; use fortune.el or cookie1.el instead.
1129 * New Modes and Packages in Emacs 24.4
1132 ** New package `eww' is a built-in web browser.
1133 It is only available if Emacs is compiled with libxml2 support.
1136 ** New minor mode `superword-mode'.
1137 This overrides the default word motion commands to treat "symbol_words"
1138 as a single word, similar to what `subword-mode' does.
1141 ** New package nadvice.el offers lighter-weight advice facilities.
1144 *** add-function/remove-function, which can be used to add/remove code on any
1145 function-carrying place, such as process-filters or `<foo>-function' hooks.
1147 *** advice-add/advice-remove to add/remove a piece of advice on a named
1148 function, much like `defadvice' does.
1150 ** New package frameset.el.
1151 It provides a set of operations to save a frameset (the state of all
1152 or a subset of the existing frames and windows, somewhat similar to a
1153 frame configuration), both in-session and persistently, and restore it
1154 at some point in the future.
1157 ** New package filenotify.el provides an interface for file system
1158 notifications. It requires that Emacs be compiled with one of the
1159 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
1162 * Incompatible Lisp Changes in Emacs 24.4
1165 ** `kill-region' has lost its `yank-handler' optional argument.
1168 ** `(input-pending-p)' no longer runs other timers that are ready to run.
1169 The new optional CHECK-TIMERS parameter allows for the prior behavior.
1172 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
1175 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
1176 Some languages match those as »...«, and others as «...», so it is
1177 better for Emacs to stay neutral by default.
1180 ** In compiled Lisp files, the header no longer includes a timestamp.
1183 ** The default file coding for Emacs Lisp files is now utf-8.
1184 (See `file-coding-system-alist'.) In most cases, this change is
1185 transparent, but files that contain unusual characters without
1186 specifying an explicit coding system may fail to load with obscure
1187 errors. You should either convert them to utf-8 or add an explicit
1191 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
1192 It used to disable the minor mode, major mode, and text-property keymaps,
1193 whereas now it simply has higher precedence.
1196 ** Default process filters and sentinels are not nil any more.
1197 Instead they default to a function that does what the nil value used to do.
1200 ** `read-event' does not return decoded chars in ttys any more.
1201 As was the case in Emacs 22 and before, the decoding of terminal
1202 input, according to `keyboard-coding-system', is not performed in
1203 `read-event' any more. But unlike in Emacs 22, this decoding is still
1204 done before input-decode-map, function-key-map, etc.
1207 ** The option `inhibit-local-menu-bar-menus' has been removed.
1210 ** Frame-local variables that affect redisplay do not work any more.
1211 More specifically, redisplay does not bother to check for a frame-local
1212 value when looking up variables.
1215 ** nil and "unbound" are indistinguishable in `symbol-function'.
1216 `symbol-function' does not signal a `void-function' error any more.
1217 To determine if a symbol's function definition is void, use `fboundp'.
1220 ** `defadvice' does not honor the `freeze' flag and cannot advise
1221 special-forms any more.
1224 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1225 when lexical binding is enabled. Previously, VAR was bound to nil,
1226 which often led to spurious unused-variable warnings.
1229 ** The return value of `backup-buffer' has changed.
1230 The second argument is no longer an SELinux context, instead it is an
1231 alist of extended attributes as returned by the new function
1232 `file-extended-attributes'. The attributes can be applied to another
1233 file using `set-file-extended-attributes'.
1236 ** By default `copy-file' no longer copies file permission bits to an
1237 existing destination; and it sets the file permission bits of a newly
1238 created destination to those of the source, masked by the default file
1239 permissions. To copy the file permission bits, pass t as the
1240 PRESERVE-PERMISSIONS argument of `copy-file'.
1243 ** `visited-file-modtime' now returns -1 for nonexistent files.
1244 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1245 in the presence of files with negative time stamps.
1248 ** The cars of the elements in `interpreter-mode-alist' are now
1249 treated as regexps rather than literal strings.
1252 * Lisp Changes in Emacs 24.4
1255 ** The second argument of `eval' can now specify a lexical environment.
1258 ** New functions `special-form-p' and `macrop'.
1261 ** New macro `define-alternatives' can be used to define generic commands.
1262 Generic commands are interactive functions whose implementation can be
1263 selected among several alternatives, as a matter of user preference.
1266 ** If you give a symbol a `defalias-fset-function' property, `defalias'
1267 on that symbol will use the associated value as a function to call
1271 ** New variable `enable-dir-local-variables'.
1272 Directory-local variables are ignored if this is nil. This may be
1273 useful for modes that want to ignore directory-locals while still
1274 respecting file-local variables.
1277 ** New function `get-pos-property'.
1280 ** `read-regexp' now uses the new variable `read-regexp-defaults-function'
1281 as a function to call to provide default values.
1283 ** Completion changes
1286 *** The separator used by `completing-read-multiple' is now a regexp.
1287 The default `crm-separator' has been changed to allow surrounding spaces
1291 *** The `common-substring' argument of `display-completion-list',
1292 which has been documented as obsolete since Emacs 23.1, is now _really_
1293 obsolete, and no longer advertised. Instead either call
1294 `completion-hilit-commonality' to add the highlighting; or use
1295 `completion-all-completions', which returns highlighted strings.
1298 *** New function `completion-table-with-cache' is a wrapper for
1299 `completion-table-dynamic' that caches the result of the last lookup.
1302 *** New function `completion-table-merge' to combine several
1303 completion tables by merging their completions.
1306 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1307 display specified symbols as composed characters. E.g., in Emacs Lisp mode,
1308 this replaces the string "lambda" with the Greek lambda character.
1313 *** Functions to pop up menus and dialogs now work on all terminals,
1314 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1315 `message-box', `yes-or-no-p', etc.
1317 The function `display-popup-menus-p' will now return non-nil for a
1318 display or frame whenever a mouse is supported on that display or
1322 *** New hook `tty-setup-hook', run at the end of initializing a text terminal.
1325 *** The hook `term-setup-hook' is obsolete. It is entirely equivalent
1326 to `emacs-startup-hook'. See also the new `tty-setup-hook'.
1329 ** New hook `pre-redisplay-function'.
1332 ** New bool-vector set operation functions
1333 *** `bool-vector-exclusive-or'
1334 *** `bool-vector-union'
1335 *** `bool-vector-intersection'
1336 *** `bool-vector-set-difference'
1337 *** `bool-vector-not'
1338 *** `bool-vector-subsetp'
1339 *** `bool-vector-count-consecutive'
1340 *** `bool-vector-count-population'
1343 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1345 ** Error-handling changes
1348 *** New function `define-error'.
1351 *** `with-demoted-errors' takes an additional argument `format'.
1354 ** New macro `with-eval-after-load'.
1355 This is like the old `eval-after-load', but better behaved.
1358 ** New library subr-x.el with miscellaneous small utility functions
1359 *** `hash-table-keys'
1360 *** `hash-table-values'
1361 *** `string-blank-p'
1362 *** `string-empty-p'
1364 *** `string-reverse'
1365 *** `string-trim-left'
1366 *** `string-trim-right'
1368 *** `string-remove-prefix'
1369 *** `string-remove-suffix'
1372 ** Obsoleted functions
1375 *** `lisp-complete-symbol'
1376 *** `field-complete'
1377 *** `minibuffer-completion-contents'
1378 *** `isearch-nonincremental-exit-minibuffer'
1379 *** `isearch-filter-visible'
1380 *** `generic-make-keywords-list'
1381 *** `get-upcase-table' (use `case-table-get-table' instead).
1384 ** `with-wrapper-hook' is obsoleted by `add-function'.
1385 The few hooks that used with-wrapper-hook are replaced as follows:
1386 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1387 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1388 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1391 ** `byte-compile-interactive-only-functions' is now obsolete.
1392 To specify that a command should only be called interactively, give it
1393 a non-nil `interactive-only' property.
1396 ** `split-string' now takes an optional argument TRIM.
1397 The value, if non-nil, is a regexp that specifies what to trim from
1398 the start and end of each substring.
1401 ** New function `string-suffix-p'.
1403 ** File-handling changes
1406 *** Support for filesystem notifications.
1407 Emacs now supports notifications of filesystem changes, such as
1408 creation, modification, and deletion of files. This requires the
1409 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1410 MS-Windows systems, this is supported for Windows XP and newer
1414 *** The 9th element returned by `file-attributes' is now unspecified.
1415 Formerly, it was t if the file's gid would change if file were deleted
1416 and recreated. This value has been inaccurate for years on many
1417 platforms, and nobody seems to have noticed or cared.
1420 *** The 6th argument to `copy-file' has been renamed to
1421 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1422 Unix file permission bits as well as SELinux context.
1425 *** The function `file-ownership-preserved-p' now has an optional
1426 argument GROUP which causes it check for file group too. This can be
1427 used in place of the 9th element of `file-attributes'.
1430 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1431 argument, with the same interpretation as the returned value of
1432 `visited-file-modtime'.
1434 ** Autorevert changes
1437 *** If Emacs is compiled with file notification support, notifications
1438 are used instead of checking the time stamp of the files. You can
1439 disable this by setting the user option `auto-revert-use-notify' to
1440 nil. Alternatively, a regular expression of directories to be
1441 excluded from file notifications can be specified by
1442 `auto-revert-notify-exclude-dir-regexp'.
1445 *** The new user option `auto-revert-remote-files' enables reversion
1446 of remote files when set to non-nil.
1451 *** The function `face-spec-set' is now like `setq' for face specs.
1452 Its third arg now accepts values specifying a face spec type (defface,
1453 custom, or override spec), and the relevant spec is set accordingly.
1456 *** New function `add-face-text-property', which can be used to
1457 conveniently prepend/append new face properties.
1460 *** Face specs set via Custom themes now replace the `defface' spec
1461 rather than inheriting from it. In other words, setting a face via a
1462 theme now behaves like setting it via Customize: you only need to
1463 specify the attributes that you want, you don't need to unset those
1464 that you don't want.
1467 *** New face characteristic (supports :underline (:style wave))
1468 specifies whether or not the terminal can display a wavy line.
1471 *** New face spec attribute :distant-foreground
1472 specifies foreground to use if background color is near the foreground
1473 color that would otherwise have been used.
1478 *** `image-animated-p' is now `image-multi-frame-p'.
1479 It returns non-nil for any image that contains multiple frames,
1480 whether or not it specifies a frame delay.
1483 *** New variable `image-default-frame-delay' gives the frame delay for
1484 animated images which do not specify a frame delay.
1487 *** New functions `image-current-frame' and `image-show-frame' for getting
1488 and setting the current frame of a multi-frame image.
1493 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1494 **** object-name -> eieio-object-name
1495 **** object-class -> eieio-object-class
1496 **** object-class-fast -> eieio--object-class
1497 **** object-class-name -> eieio-object-class-name
1498 **** object-name-string -> eieio-object-name-string
1499 **** object-num-slots -> eieio--object-num-slots
1500 **** object-set-name-string -> eieio-object-set-name-string
1501 **** class-of -> eieio-object-class
1502 **** class-name -> eieio-class-name
1503 **** class-parent -> eieio-class-parent
1504 **** class-parents -> eieio-class-parents
1505 **** class-parents-fast -> eieio-class-parents-fast
1506 **** class-children -> eieio-class-children
1507 **** class-num-slots -> eieio--class-num-slots
1508 **** class-precedence-list -> eieio-class-precedence-list
1509 **** class-direct-subclasses -> eieio-class-children
1510 **** class-direct-superclasses -> eieio-class-parents
1512 ** Changes in encoding and decoding of text
1515 *** New coding-system `prefer-utf-8'.
1516 This is like `undecided' but prefers UTF-8 on decoding if the text to
1517 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1518 any non-ASCII characters are automatically encoded as UTF-8.
1521 *** New attributes of coding-systems whose type is `undecided'.
1522 Two new attributes, `:inhibit-null-byte-detection' and
1523 `:inhibit-iso-escape-detection', determine how to detect encoding of
1524 text that includes null bytes and ISO-2022 escape sequences,
1525 respectively. Each of these attributes can be either nil, zero, or
1526 t. If it is t, decoding text ignores null bytes and, respectively,
1527 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1528 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1529 text is encoded in one of the ISO-2022 encodings, such as
1530 iso-2022-7bit. If the value is zero, Emacs consults the variables
1531 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1533 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1534 UTF-8 encoding and decoding, whenever possible.
1536 These attributes are only meaningful for coding-systems of type
1537 `undecided'. (The type of a coding-system is determined by its
1538 `:coding-type' attribute and can be accessed by calling the
1539 `coding-system-type' function.)
1542 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1545 ** New functions `group-gid' and `group-real-gid'.
1548 ** The spelling of the rx.el category `chinese-two-byte' has been
1549 corrected (the first 'e' was missing).
1552 ** Minor internal changes to the details of lock files.
1553 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1554 If DIR/.#FILE already exists and is not an Emacs lock file,
1555 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1556 numbered lock files DIR/.#FILE.0...).
1557 On file systems that do not support symbolic links, the lock is now a
1558 regular file with contents being what would have been in the symlink.
1560 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1563 *** The package descriptor and name of global variables, constants,
1564 and functions should be separated by two hyphens if the symbol is not
1565 meant to be used by other packages.
1568 * Changes in Emacs 24.4 on Non-Free Operating Systems
1571 ** The procedure for building Emacs on MS-Windows has changed.
1572 It is now built by running the same configure script as on all other
1573 platforms. This requires the MSYS environment and MinGW development
1574 tools. See the updated instructions in nt/INSTALL for details.
1576 Using the Posix configure script and Makefile's also means a change in
1577 the directory structure of the Emacs installation on Windows. It is
1578 now the same as on GNU and Unix systems. In particular, the auxiliary
1579 programs, such as cmdproxy.exe and hexl.exe, are in
1580 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1581 version), version-independent site-lisp is in share/emacs/site-lisp,
1582 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1583 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1584 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1585 directories and will find the files in there automatically; there's no
1586 need to set any variables due to this change.)
1589 ** Emacs on Windows 2000 and later can now access files and directories
1590 whose names cannot be encoded in the current system codepage.
1592 The new variable `w32-unicode-filenames' controls this feature: if it
1593 is t, Emacs uses Unicode APIs to pass file names to system calls,
1594 which lifts the limitation of file names to the current locale.
1597 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1598 The backtrace is written to the 'emacs_backtrace.txt' file in the
1599 directory where Emacs was running.
1602 ** The variable `buffer-file-type' is no longer supported.
1603 Setting it has no effect, and %t in the mode-line format is ignored.
1604 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1605 modifying it has no effect.
1608 ** Lock files now work on MS-Windows.
1609 This helps to prevent losing your edits if the same file is being
1610 edited in another Emacs session or by another user. See the node
1611 "Interlocking" in the Emacs User Manual for the details. To disable
1612 file locking, customize `create-lockfiles' to nil.
1614 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1615 GNUstep and Mac OS X 10.4 use the old font backend.
1616 To use the old backend by default, do on the command line:
1617 % defaults write org.gnu.Emacs FontBackend ns
1619 ** Improved fullscreen support on Mac OS X.
1620 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1621 Customize `ns-use-native-fullscreen' to change the style.
1622 For Mac OS X 10.7 and newer, native is the default.
1624 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1625 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1626 does not apply to images.
1629 * Installation Changes in Emacs 24.3
1631 ** The default X toolkit is now Gtk+ version 3.
1632 If you don't pass `--with-x-toolkit' to configure, or if you use
1633 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1634 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1635 You can explicitly require a specific version by passing
1636 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1638 ** New configure option `--enable-link-time-optimization', to utilize
1639 an appropriate feature provided by GCC since version 4.5.0.
1641 ** New configure option `--without-all' to disable most of the optional
1642 features (image support, etc.) that are normally enabled by default.
1644 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1645 Emacs). If building with GCC, this enables compile-time checks that
1646 warn/give errors about possibly-questionable C code. On a recent GNU
1647 system there should be no warnings; on older and on non-GNU systems
1648 the results may be useful to developers.
1650 ** The configure option `--enable-use-lisp-union-type' has been
1651 renamed to `--enable-check-lisp-object-type', as the resulting
1652 Lisp_Object type no longer uses a union to implement the compile time
1653 check that this option enables.
1655 ** The configure option `--disable-maintainer-mode' has been removed,
1656 as it was confusingly-named and rarely useful.
1658 ** The configure options `--program-prefix', `--program-suffix', and
1659 `--program-transform-name' apply to more than just the installed
1660 binaries. Now they also affect the man pages, icons, and the
1661 etc/emacs.desktop file; but not the info pages, since this would break
1662 links between the various manuals.
1664 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1665 overwriting "emacs" in the installation bin/ directory with a link
1668 ** Emacs uses libtinfo in preference to libncurses, if available.
1670 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1671 /usr/pkg/lib to the linker search path. You must add them yourself if
1674 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1675 (from the bin and libexec directories, respectively). The former is
1676 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1679 * Startup Changes in Emacs 24.3
1681 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1682 lisp/ directory. There should not be any there anyway. If you have
1683 been adding them there, put them somewhere else; e.g., site-lisp.
1685 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1688 * Changes in Emacs 24.3
1692 *** `C-h f' (`describe-function') can now perform autoloading.
1693 When this command is called for an autoloaded function whose docstring
1694 contains a key substitution construct, that function's library is
1695 automatically loaded, so that the documentation can be shown
1696 correctly. To disable this, set `help-enable-auto-load' to nil.
1698 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1699 even after their associated libraries have been loaded (and the
1700 autoloads have been redefined as functions).
1704 *** Images displayed via ImageMagick now support transparency and the
1705 :background image specification property.
1707 *** When available, ImageMagick support is automatically enabled.
1708 It is no longer necessary to call `imagemagick-register-types'
1709 explicitly to install ImageMagick image types; that function is called
1710 automatically at startup, or when customizing an imagemagick- option.
1712 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1713 ImageMagick to view images. (You must call `imagemagick-register-types'
1714 afterwards if you do not use customize to change this.)
1716 *** The new variable `imagemagick-enabled-types' also affects which
1717 ImageMagick types are treated as images. The function
1718 `imagemagick-filter-types' returns the list of types that will be
1723 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1724 next and previous path separator, respectively.
1726 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1727 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1728 non-nil before enabling the mode.
1732 *** New option `mode-line-default-help-echo' specifies the help text
1733 (shown in a tooltip or in the echo area) for any part of the mode line
1734 that does not have its own specialized help text.
1736 *** You can now click mouse-3 in the coding system indicator to invoke
1737 `set-buffer-file-coding-system'.
1739 ** Server and client
1741 *** emacsclient now obeys string values for `initial-buffer-choice',
1742 if it is told to open a new frame without specifying any file to visit
1743 or expression to evaluate.
1745 *** New option `server-auth-key' specifies a shared server key.
1747 ** Emacs now generates backtraces on fatal errors.
1748 On encountering a fatal error, Emacs now outputs a textual description
1749 of the fatal signal, and a short backtrace on platforms like glibc
1750 that support backtraces.
1752 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1753 This minor mode replaces `toggle-read-only', which is now obsolete.
1755 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1756 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1757 respectively, without exiting from the prompt.
1759 ** In the Package Menu, newly-available packages are listed as "new",
1760 and sorted above the other "available" packages by default.
1762 ** If your Emacs was built from a repository checkout, the new variable
1763 `emacs-bzr-version' contains information about the bzr revision used.
1765 ** New option `create-lockfiles' specifies usage of lockfiles.
1766 It defaults to t. Changing it to nil inhibits the creation of lock
1767 files (use this with caution).
1769 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1770 variables on remote hosts.
1772 ** The entry for PCL-CVS has been removed from the Tools menu.
1773 The PCL-CVS commands are still available via the keyboard.
1775 ** Using "unibyte: t" in Lisp source files is obsolete.
1776 Use "coding: raw-text" instead.
1778 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1779 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1780 The previous binding, introduced in Emacs 24.1, was a mistake, because
1781 `C-c LETTER' bindings are reserved for user customizations.
1783 ** Internationalization
1785 *** New language environment: Persian.
1787 *** New input method `vietnamese-vni'.
1789 ** Nextstep (GNUstep / Mac OS X) port
1791 *** Support for fullscreen and the frame parameter fullscreen.
1793 *** A file dialog is used for open/save operations initiated from the
1797 * Editing Changes in Emacs 24.3
1799 ** Search and Replace
1801 *** Non-regexp Isearch now performs "lax" space matching.
1802 Each sequence of spaces in the supplied search string may match any
1803 sequence of one or more whitespace characters, as specified by the
1804 variable `search-whitespace-regexp'. (This variable is also used by a
1805 similar existing feature for regexp Isearch.)
1807 *** New Isearch command `M-s SPC' toggles lax space matching.
1808 This applies to both ordinary and regexp Isearch.
1810 *** New option `replace-lax-whitespace'.
1811 If non-nil, `query-replace' uses flexible whitespace matching too.
1814 *** Global `M-s _' starts a symbol (identifier) incremental search,
1815 and `M-s _' in Isearch toggles symbol search mode.
1816 `M-s c' in Isearch toggles search case-sensitivity.
1818 ** Navigation commands
1820 *** New binding `M-g c' for `goto-char'.
1822 *** New binding `M-g TAB' for `move-to-column'.
1824 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1825 interactively with no prefix arg. Previously, it moved to column 1.
1827 ** New option `yank-handled-properties' allows processing of text
1828 properties on yanked text, in ways that are more general than just
1829 removing them (as is done by `yank-excluded-properties').
1831 ** New option `delete-trailing-lines' specifies whether
1832 M-x delete-trailing-whitespace should delete trailing lines at the end
1833 of the buffer. It defaults to t.
1835 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1837 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1838 `ucs-insert' is now an obsolete alias for `insert-char'.
1840 ** The `z' key no longer has a binding in most special modes.
1841 It used to be bound to `kill-this-buffer', but `z' is too easy to
1844 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1845 It copies the region-rectangle as the last rectangle kill.
1849 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1851 *** New option `register-separator' specifies the register containing
1852 the text to put between collected texts for use with
1853 M-x append-to-register and M-x prepend-to-register.
1856 * Changes in Specialized Modes and Packages in Emacs 24.3
1858 ** Common Lisp emulation (CL)
1860 *** CL's main entry is now (require 'cl-lib).
1861 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1862 i.e., all its definitions have the "cl-" prefix (and internal definitions
1863 use the "cl--" prefix).
1865 If `cl' provided a feature under the name `foo', then `cl-lib'
1866 provides it under the name `cl-foo' instead; with the exceptions of the
1867 few `cl' definitions that had to use `foo*' to avoid conflicts with
1868 pre-existing Elisp entities. These have been renamed to `cl-foo'
1869 rather than `cl-foo*'.
1871 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1872 provide the old, non-prefixed names. Some exceptions are listed below:
1874 *** `cl-flet' is not like `flet' (which is deprecated).
1875 Instead it obeys the behavior of Common-Lisp's `flet'.
1876 In particular, in cl-flet function definitions are lexically scoped,
1877 whereas in flet the scoping is dynamic.
1879 *** `cl-labels' is slightly different from `labels'.
1880 The difference is that it relies on the `lexical-binding' machinery
1881 (as opposed to the `lexical-let' machinery used previously) to capture
1882 definitions in closures, so such closures will only work if `lexical-binding'
1885 *** `cl-letf' is not exactly like `letf'.
1886 The only difference is in details that relate to some deprecated usage
1887 of `symbol-function' in place forms.
1889 *** `progv' was rewritten to use the `let' machinery.
1890 A side effect is that variables without corresponding values are bound
1891 to nil rather than being made unbound.
1893 *** The following methods of extending `setf' are obsolete
1894 (use features from gv.el instead):
1895 `define-modify-macro' (use `gv-letplace')
1896 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1897 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1898 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1902 *** Changes are now highlighted using the same color scheme as in
1903 modern VCSes. Deletions are displayed in red (new faces
1904 `diff-refine-removed' and `smerge-refined-removed', and new definition
1905 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1906 and `smerge-refined-added', and new definition of `diff-added').
1908 *** The variable `diff-use-changed-face' defines whether to use the
1909 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1910 changes in context diffs.
1912 *** The new command `diff-delete-trailing-whitespace' removes trailing
1913 whitespace introduced by a diff.
1915 ** Ediff now uses the same color scheme as Diff mode.
1919 A new version of python.el, which provides several new features, including:
1920 per-buffer shells, better indentation, Python 3 support, and improved
1921 shell-interaction compatible with iPython (and virtually any other
1924 *** Some user options have been replaced/renamed, including (old -> new):
1925 **** python-indent -> python-indent-offset
1926 **** python-guess-indent -> python-indent-guess-indent-offset
1927 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1928 **** python-use-skeletons -> python-skeleton-autoinsert
1930 *** Some user options have been removed, including:
1932 **** `python-indent-string-contents': Strings are never indented.
1934 **** `python-honour-comment-indentation':
1935 Comments are always considered as indentation markers.
1937 **** `python-continuation-offset': Indentation is automatically
1938 calculated in a pep8 compliant way depending on the context.
1940 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1941 Have no direct mapping as the shell interaction is completely different.
1943 **** `python-python-command', `python-jython-command':
1944 Replaced by `python-shell-interpreter'.
1946 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1947 `python-pdbtrack-minor-mode-string', `python-source-modes':
1950 *** Some commands have been replaced (old -> new):
1951 **** python-insert-class -> python-skeleton-class
1952 **** python-insert-def -> python-skeleton-def
1953 **** python-insert-for -> python-skeleton-for
1954 **** python-insert-if -> python-skeleton-if
1955 **** python-insert-try/except -> python-skeleton-try
1956 **** python-insert-try/finally -> python-skeleton-try
1957 **** python-insert-while -> python-skeleton-while
1958 **** python-find-function -> python-nav-jump-to-defun
1959 **** python-next-statement -> python-nav-forward-sentence
1960 **** python-previous-statement -> python-nav-backward-sentence
1961 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1962 **** python-end-of-defun-function -> python-nav-end-of-defun
1963 **** python-send-buffer -> python-shell-send-buffer
1964 **** python-send-defun -> python-shell-send-defun
1965 **** python-send-region -> python-shell-send-region
1966 **** python-send-region-and-go -> emulate with python-shell-send-region
1967 and python-shell-switch-to-shell
1968 **** python-send-string -> python-shell-send-string
1969 **** python-switch-to-python -> python-shell-switch-to-shell
1970 **** python-describe-symbol -> python-eldoc-at-point
1974 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1976 *** The D-Bus object manager interface is implemented.
1978 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1979 if their value does not fit into Emacs's integer range.
1981 *** The function `dbus-call-method' is now non-blocking.
1982 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1984 *** Signals can also be sent as unicast messages.
1986 *** The argument list of `dbus-register-signal' has been extended,
1987 according to the new match rule types of D-Bus.
1989 *** `dbus-init-bus' supports private connections.
1991 *** There is a new function `dbus-setenv'.
1993 ** `desktop-path' no longer includes the "." directory.
1994 Desktop files are now located in ~/.emacs.d by default.
1998 *** `dired-do-async-shell-command' executes each file sequentially
1999 if the command ends in `;' (when operating on multiple files).
2000 Otherwise, it executes the command on each file in parallel.
2002 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
2003 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
2006 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
2007 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
2008 mark/unmark/flag all files in the active region.
2010 *** The minibuffer default for `=' (`dired-diff') has changed.
2011 It is now the backup file for the file at point, if one exists.
2012 In Transient Mark mode the default is the file at the active mark.
2014 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
2015 The global binding for `M-=', `count-words-region' is in effect.
2019 *** New module "notifications", which can send a notification when you
2020 receive a private message or your nickname is mentioned.
2022 *** ERC will look up server/channel names via auth-source and use any
2025 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
2026 only applies to messages sent by lurkers.
2028 ** reStructuredText mode
2030 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
2031 fontification, comment handling, and customization have all been revised
2034 *** Support for `imenu' and `which-function-mode'.
2036 *** The reStructuredText syntax is more closely covered.
2037 Sphinx support has been improved.
2039 *** `rst-insert-list' inserts new list or continues existing lists.
2041 *** A negative prefix argument always works for `rst-adjust'.
2043 *** The window configuration is reset after displaying a TOC.
2045 *** The constant `rst-version' describes the rst.el package version.
2049 *** Support for percent literals and recognition of regular expressions
2050 in method calls without parentheses with more methods, including Cucumber
2053 *** Improved syntax highlighting and indentation.
2055 *** New command `ruby-toggle-block', bound to `C-c {'.
2057 *** Some non-standard keybindings/commands have been removed:
2059 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
2061 **** `ruby-mark-defun'; use `mark-defun'.
2063 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
2064 appropriate settings for the variables `beginning-of-defun-function'
2065 and `end-of-defun-function'.
2067 **** Non-standard keybindings for `backward-kill-word', `comment-region',
2068 `reindent-then-newline-and-indent' and `newline' have been removed.
2070 ** Shell Script mode
2072 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
2074 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
2076 *** `sh-use-smie' lets you choose a new indentation and navigation code.
2080 *** The free software compiler GHDL is supported (and now the default).
2082 *** Support for the VHDL-AMS packages has been added/updated.
2084 *** Updated to the 2002 revision of the VHDL standard.
2086 *** Accepts \r and \f as whitespace.
2090 *** The faces used by Apropos are now directly customizable.
2091 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
2092 see the `apropos' Custom group for details.
2094 *** The old options whose values specified faces to use have been removed
2095 (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
2096 `apropos-match-face' and `apropos-property-face'.).
2100 *** This package has been rewritten to use Tabulated List mode.
2102 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
2103 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
2107 *** Algebraic simplification mode is now the default.
2108 To restrict to the limited simplifications given by the former
2109 default simplification mode, use `m I'.
2113 *** You can customize the header text that appears above each calendar month.
2114 See the variable `calendar-month-header'.
2116 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
2118 *** The calendars produced by cal-html include holidays.
2119 Customize `cal-html-holidays' to change this.
2123 *** The major modes from the parser generators "Bovine" and "Wisent"
2124 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
2125 are in `auto-mode-alist', and the corresponding manuals are included.
2129 **** Menu support for the "Configuration" feature. This allows users to
2130 choose the active configuration (such as debug or install) from the menu.
2132 **** New command `ede-set' to interactively set project-local variables.
2134 **** Support for compiling, debugging, and running in "generic" projects.
2136 **** Autoconf editing support for M4 macros with complex arguments.
2138 **** Compilation support for the "linux" project type.
2140 **** "simple" projects have been removed; use "generic" projects instead.
2144 **** Support for parsing #include statements inside a namespace in C/C++.
2146 **** Improved support for 'extern "C"' declarations in C/C++.
2148 **** The ability to ignore more common special C/C++ preprocessor symbols,
2149 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
2150 If available, include cdefs.h as an additional source of preprocessor symbols.
2152 **** Improved C/C++ function pointer parsing.
2154 **** In Python, support for converting imports to include file names.
2156 **** Ability to dynamically determine the Python load path.
2158 **** Support for the Python 'WITH' and 'AT' keywords.
2160 **** Improved tooltip completion.
2164 **** The SRecode manual is now included.
2166 **** Tag generation supports constructor/destructor settings and system
2167 include differentiation.
2169 **** Addition of 'Framework' support: Frameworks are specified when a
2170 particular kind of library (such as Android) is needed in a common language
2173 **** Support for nested templates and let variables override based on priority.
2175 **** Support for merging tables from multiple related modes, such as
2176 default -> c++ -> arduino.
2178 ** Compile has a new option `compilation-always-kill'.
2182 *** `custom-reset-button-menu' now defaults to t.
2184 *** Non-option variables are never matched in `customize-apropos' and
2185 `customize-apropos-options' (i.e., the prefix argument does nothing for
2186 these commands now).
2190 *** The variables `term-default-fg-color' and `term-default-bg-color'
2191 are now deprecated in favor of the customizable face `term'.
2193 *** You can customize how to display ANSI terminal colors and styles
2194 by customizing the corresponding `term-color-<COLOR>',
2195 `term-color-underline' and `term-color-bold' faces.
2199 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
2201 *** Remote processes are now also supported on remote MS-Windows hosts.
2205 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
2206 Previously, this slot stored semicolon-separated attribute-value pairs
2207 appended to some imap URLs, but this is not compatible with RFC 3986.
2208 So now the `filename' slot stores the entire path and query components,
2209 and the `attributes' slot is always nil.
2211 *** New function `url-encode-url' for encoding a URI string.
2212 The `url-retrieve' function now uses this to encode its URL argument,
2213 in case that is not properly encoded.
2215 ** notifications.el supports now version 1.2 of the Notifications API.
2216 The function `notifications-get-capabilities' returns the supported
2219 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2220 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2221 `flymake-warning-bitmap'.
2223 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2224 specifying URL types that should be converted to remote file names at
2225 the FFAP prompt. The default is now '("ftp").
2227 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2228 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2230 ** New option `mouse-avoidance-banish-position' specifies where the
2231 `banish' mouse avoidance setting moves the mouse.
2233 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2234 closing brackets to be aligned with the line of the opening bracket.
2236 ** In Proced mode, new command `proced-renice' renices marked processes.
2238 ** New option `async-shell-command-buffer' specifies the buffer to use
2239 for a new asynchronous `shell-command' when the default output buffer
2240 `*Async Shell Command*' is already in use.
2242 ** SQL mode has a new option `sql-db2-escape-newlines'.
2243 If non-nil, newlines sent to the command interpreter will be escaped
2244 by a backslash. The default does not escape the newlines and assumes
2245 that the sql statement will be terminated by a semicolon.
2247 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2248 (and modes that derive from it), sorts the column at point, or the Nth
2249 column if a numeric prefix argument is given.
2251 ** `which-func-modes' now defaults to t, so Which Function mode, when
2252 enabled, applies to all applicable major modes.
2254 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2257 ** Follow mode no longer works by using advice.
2258 The option `follow-intercept-processes' has been removed.
2260 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2262 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2263 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2264 *** semantic-change-hooks -> semantic-change-functions
2265 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2266 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2267 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2268 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2269 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2270 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2271 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2272 *** rcirc-activity-hooks -> rcirc-activity-functions
2273 *** rcirc-print-hooks -> rcirc-print-functions
2274 *** dbus-event-error-hooks -> dbus-event-error-functions
2275 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2276 *** checkdoc-style-hooks -> checkdoc-style-functions
2277 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2278 *** archive-extract-hooks -> archive-extract-hook
2279 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2280 *** hfy-post-html-hooks -> hfy-post-html-hook
2281 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2282 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2283 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2284 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2286 ** Obsolete packages
2289 In most cases, assoc+member+push+delq work just as well.
2290 And in any case it's just a terrible package: ugly semantics, terrible
2291 inefficiency, and not namespace-clean.
2300 * Incompatible Lisp Changes in Emacs 24.3
2302 ** Docstrings starting with `*' no longer indicate user options.
2303 Only variables defined using `defcustom' are considered user options.
2304 The function `user-variable-p' is now an obsolete alias for
2305 `custom-variable-p'.
2307 ** The return values of `defalias', `defun' and `defmacro' have changed,
2308 and are now undefined. For backwards compatibility, `defun' and
2309 `defmacro' currently return the name of the newly defined
2310 function/macro, but this should not be relied upon.
2312 ** `random' by default now returns a different random sequence in
2313 every Emacs run. Use `(random S)', where S is a string, to set the
2314 random seed to a value based on S, in order to get a repeatable
2315 sequence in later calls.
2317 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2318 that substring is inserted literally even if the LITERAL arg is
2319 non-nil, instead of causing an error to be signaled.
2321 ** `select-window' now always makes the window's buffer current.
2322 It does so even if the window was selected before.
2324 ** The function `x-select-font' can return a font spec, instead of a
2325 font name as a string. Whether it returns a font spec or a font name
2326 depends on the graphical library.
2328 ** `face-spec-set' no longer sets frame-specific attributes when the
2329 third argument is a frame (that usage was obsolete since Emacs 22.2).
2331 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2333 ** The CL package's `get-setf-method' function no longer exists.
2334 Generalized variables are now part of core Emacs Lisp, and implemented
2335 differently to the way cl.el used to do it. It is not possible to
2336 define a compatible replacement for `get-setf-method'. See the file
2337 gv.el for internal details of the new implementation.
2339 ** The arguments of `dbus-register-signal' are no longer just strings,
2340 but keywords or keyword-string pairs. The old argument list will
2341 still be supported for Emacs 24.x.
2343 ** Miscellaneous name changes
2344 Some Lisp symbols have been renamed to correct their spelling,
2345 or to be more consistent with standard Emacs terminology.
2347 *** Renamed functions
2348 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2349 **** inactivate-input-method -> deactivate-input-method
2350 **** quail-inactivate -> quail-deactivate
2351 **** robin-inactivate -> robin-deactivate
2352 **** viper-inactivate-input-method -> viper-deactivate-input-method
2353 **** viper-inactivate-input-method-action ->
2354 viper-deactivate-input-method-action
2355 **** ucs-input-inactivate -> ucs-input-deactivate
2358 The old hooks are still supported for backward compatibility, but they
2359 are deprecated and will be removed eventually.
2360 **** input-method-inactivate-hook -> input-method-deactivate-hook
2361 **** robin-inactivate-hook -> robin-deactivate-hook
2362 **** quail-inactivate-hook -> quail-deactivate-hook
2364 *** Renamed variables
2365 **** follow-deactive-menu -> follow-inactive-menu
2366 **** inactivate-current-input-method-function ->
2367 deactivate-current-input-method-function
2369 ** Some obsolete functions, variables, and faces have been removed:
2370 *** `last-input-char', `last-command-char', `unread-command-char'
2371 *** `facemenu-unlisted-faces'
2372 *** `rmail-decode-mime-charset'
2373 *** `iswitchb-read-buffer'
2374 *** `sc-version', `sc-submit-bug-report'
2375 *** `set-char-table-default'
2376 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2377 *** `compile-internal'
2379 *** `mode-line-inverse-video'
2380 *** `follow-mode-off-hook'
2381 *** `cvs-commit-buffer-require-final-newline'
2382 (use `log-edit-require-final-newline' instead)
2383 *** `cvs-changelog-full-paragraphs'
2384 (use `log-edit-changelog-full-paragraphs' instead)
2385 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2386 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2387 *** `vc-master-templates' (use `vc-handled-backends' instead)
2388 *** `vc-checkout-carefully'
2391 * Lisp Changes in Emacs 24.3
2393 ** CL-style generalized variables are now in core Elisp.
2394 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2395 You can define your own generalized variables using `gv-define-simple-setter',
2396 `gv-define-setter', etc.
2398 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2399 This can significantly speed up execution of non-byte-compiled code,
2400 but can also bump into previously unnoticed cyclic dependencies.
2401 These are generally harmless: they will simply cause the macro calls
2402 to be left for later expansion (as before), but will result in a
2403 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2404 You may wish to restructure your code so this does not happen.
2406 ** New sampling-based Elisp profiler.
2407 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2408 When finished, use M-x profiler-stop. The sampling rate can be based on
2409 CPU time or memory allocations.
2411 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2412 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2414 ** New macros `setq-local' and `defvar-local'.
2416 ** Face underlining can now use a wave.
2418 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2419 of `read-regexp' accepts a string ending with a colon and space, and its
2420 second argument DEFAULTS can be a list of strings accessible via `M-n'
2421 in the minibuffer ahead of other hard-coded useful regexp-related values.
2422 More commands use `read-regexp' now to read their regexp arguments.
2426 *** New function `completion-table-with-quoting' to handle completion
2427 in the presence of quoting, such as file completion in shell buffers.
2429 *** New function `completion-table-subvert' to use an existing completion
2430 table, but with a different prefix.
2434 *** New error type and new function `user-error'.
2435 These do not trigger the debugger.
2437 *** New option `debugger-bury-or-kill', saying what to do with the
2438 debugger buffer when exiting debug.
2440 *** Set `debug-on-message' to enter the debugger when a certain
2441 message is displayed in the echo area. This can be useful when trying
2442 to work out which code is doing something.
2444 *** New var `inhibit-debugger', automatically set to prevent accidental
2445 recursive invocations.
2449 *** New command `fit-frame-to-buffer' adjusts the frame height to
2452 *** The command `fit-window-to-buffer' can adjust the frame height
2453 if the new option `fit-frame-to-buffer' is non-nil.
2455 *** New macro `with-temp-buffer-window', similar to
2456 `with-output-to-temp-buffer'.
2458 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2461 *** New option `switch-to-buffer-preserve-window-point' to restore a
2462 window's point when switching buffers.
2464 *** New display action alist entries `window-height' and `window-width'
2465 specify the size of new windows created by `display-buffer'.
2467 *** New display action alist entry `pop-up-frame-parameters', if
2468 non-nil, specifies frame parameters to give any newly-created frame.
2470 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2471 tells display action functions to avoid changing which frame is
2474 *** New display action alist entry `previous-window', if non-nil,
2475 specifies window to reuse in `display-buffer-in-previous-window'.
2477 *** New display action functions `display-buffer-below-selected',
2478 and `display-buffer-in-previous-window'.
2480 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2481 now accept a third argument to avoid choosing the selected window.
2483 *** Additional values recognized for option `window-combination-limit'.
2485 *** The following variables are obsolete, as they can be replaced by
2486 appropriate entries in the `display-buffer-alist' function introduced
2488 **** `dired-shrink-to-fit'
2489 **** `display-buffer-reuse-frames'
2490 **** `display-buffer-function'
2491 **** `special-display-buffer-names'
2492 **** `special-display-frame-alist'
2493 **** `special-display-function'
2494 **** `special-display-regexps'
2498 *** `current-time-string' no longer requires that its argument's year
2499 must be in the range 1000..9999. It now works with any year supported
2500 by the underlying C implementation.
2502 *** `current-time' now returns extended-format time stamps
2503 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2504 PSEC is typically a multiple of 1000 on current machines. Other
2505 functions that use this format, such as `file-attributes' and
2506 `format-time-string', have been changed accordingly. Old-format time
2507 stamps are still accepted.
2509 *** The format of timers in `timer-list' and `timer-idle-list' is now
2510 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2511 The PSECS slot is new, and uses picosecond resolution. It can be
2512 accessed via the new `timer--psecs' accessor.
2514 *** Last-modified time stamps in undo lists now are of the form
2515 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2519 *** Improved security when handling persistent objects:
2521 **** `eieio-persistent-read' now features optional arguments for specifying
2522 the class to load, as well as a flag stating whether subclasses are allowed;
2523 if provided, other classes will be rejected by the reader. For
2524 compatibility with existing code, if the class is omitted only a
2527 **** New specialized reader for pulling in classes and signaling errors
2528 without evaluation of suspicious code.
2530 **** All slots that contain objects must have a :type. Slots with lists
2531 of objects must use a new type predicate for a list of an object type.
2533 *** Support for `find-function' and similar utilities, through the addition
2534 of filename support to generated symbols.
2536 ** Floating point functions now always return special values like NaN,
2537 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2538 Previously, they returned NaNs on some platforms but signaled errors
2539 on others. The affected functions are acos, asin, tan, exp, expt,
2540 log, log10, sqrt, and mod.
2542 ** New fringe bitmap `exclamation-mark'.
2544 ** Miscellaneous changes to special forms and macros
2546 *** `defun' and `defmacro' are now macros rather than special forms.
2548 *** `kbd' is now a function rather than a macro.
2550 ** Miscellaneous new functions
2552 *** `set-temporary-overlay-map' sets up a temporary keymap that
2553 takes precedence over most other maps for a short while (normally one key).
2555 *** `autoloadp' tests if its argument is an autoloaded object.
2557 *** `autoload-do-load' performs the autoloading operation.
2559 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2561 *** `file-name-base' returns a file name sans directory and extension.
2563 *** `function-get' fetches a function property, following aliases.
2565 *** `posnp' tests if an object is a `posn'.
2567 *** `system-users' returns the user names on the system.
2569 *** `system-groups' returns the group names on the system.
2571 *** `tty-top-frame' returns the topmost frame of a text terminal.
2573 ** The following functions and variables are obsolete:
2574 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2575 *** `buffer-has-markers-at'
2576 *** `macro-declaration-function' (use `macro-declarations-alist')
2577 *** `window-system-version' (provides no useful information)
2578 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2579 *** `query-replace-interactive'
2580 *** `font-list-limit' (has had no effect since Emacs < 23)
2583 * Changes in Emacs 24.3 on Non-Free Operating Systems
2585 ** Cygwin builds can use the native MS Windows user interface.
2586 Pass `--with-w32' to configure. The default remains the X11 interface.
2588 ** Two new functions are available in Cygwin builds:
2589 `cygwin-convert-file-name-from-windows' and
2590 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2591 code to access the Cygwin file-name mapping machinery to convert
2592 between Cygwin and Windows-native file and directory names.
2594 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2595 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2596 `mouse-autoselect-window'.
2598 ** On MS Windows Vista and later Emacs now supports symbolic links.
2600 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2601 support for libxml2, even if its presence is detected.
2603 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2605 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2606 directories to the search path. You must add them yourself if you want them.
2609 * Changes in Emacs 24.2
2611 ** This is mainly a bug-fix release.
2614 * Installation Changes in Emacs 24.1
2616 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2617 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2618 also depend on Gtk+. You can disable them with --without-rsvg and
2621 ** Emacs can be compiled with GnuTLS support.
2622 This happens by default if a suitably recent version of the library is
2623 found at build time. To prevent this, use the configure option
2624 `--without-gnutls'. See below for GnuTLS features.
2626 ** Emacs can be compiled with SELinux support.
2627 This happens by default if a suitably recent version of the library is
2628 found at build time. To prevent this, use the configure option
2629 `--without-selinux'. See below for SELinux features.
2631 ** Emacs can be compiled with ImageMagick support.
2632 This happens by default if a suitably recent version of the library is
2633 found at build time. To prevent this, use the configure option
2634 `--without-imagemagick'. See below for ImageMagick features.
2635 This feature is not available for the Nextstep or MS ports.
2637 ** Emacs can be compiled with libxml2 support.
2638 This happens by default if a suitably recent version of the library is
2639 found at build time. To prevent this, use the configure option
2640 `--without-xml2'. See below for libxml2 features.
2642 ** By default, the installed Info and man pages are compressed.
2643 You can disable this by configuring --without-compress-info.
2645 ** New configure option --with-wide-int.
2646 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2647 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2650 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2651 These provide no new functionality, they just remove the need to edit
2652 lib-src/Makefile by hand in order to use the associated features.
2654 ** New configure option --enable-use-lisp-union-type.
2655 This is only useful for Emacs developers to debug certain types of bugs.
2656 This is not a new feature; only the configure flag is new.
2658 ** The standalone programs digest-doc and sorted-doc are removed.
2659 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2661 ** The standalone program `fakemail' is removed.
2662 If you need it, feedmail.el provides a superset of the functionality.
2665 * Startup Changes in Emacs 24.1
2667 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2668 command line arguments, and the EMACS_UNIBYTE environment variable, no
2669 longer have any effect. (They were declared obsolete in Emacs 23.)
2671 ** New command line option `--no-site-lisp' removes site-lisp directories
2672 from load-path. -Q now implies this. This option does not affect the
2673 EMACSLOADPATH environment variable (and hence has no effect for
2677 * Changes in Emacs 24.1
2681 *** Many packages now use the `completion-at-point' command,
2682 rather than implementing separate completion commands.
2684 *** `completion-at-point' now handles tags and semantic completion.
2686 *** Completion in a non-minibuffer now tries to detect the end of completion
2687 and pops down the *Completions* buffer accordingly.
2689 *** New option `completion-cycle-threshold' allows completion cycling.
2691 *** New option `completion-category-overrides' for overriding the
2692 default completion style in certain circumstances.
2694 *** New completion style `substring'.
2696 *** Completion of buffer names uses `substring' completion by default.
2698 *** The option `widget-complete-field' has been removed.
2702 *** The first time you try sending mail, Emacs asks for a mail method.
2703 This is implemented by a new default for `send-mail-function', which
2704 is `sendmail-query-once'. This offers to use the smtpmail package, or
2705 to use the old defaults relying on external mail facilities
2706 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2707 `mailclient-send-it' on Windows).
2709 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2710 transfers the report to your desktop's preferred mail client, if there
2711 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2714 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2715 and Mail mode changes
2717 ** Emacs server and client changes
2719 *** New option `server-port' specifies the port for TCP Emacs servers.
2721 *** New emacsclient argument -q/--quiet suppresses some status messages.
2723 *** New emacsclient argument --frame-parameters specifies the frame
2724 parameters of any newly-created graphical frame.
2726 *** If emacsclient shuts down due to Emacs signaling an error,
2727 its exit status is 1.
2729 *** New emacsclient argument --parent-id ID.
2730 This opens a client frame in parent X window ID, via XEmbed, similar
2731 to the --parent-id argument to Emacs.
2733 ** Internationalization changes
2735 *** Emacs now supports display and editing of bidirectional text.
2736 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2737 displayed in the correct visual order as expected by users of those
2738 scripts. The display reordering is a "full bidirectionality" class
2739 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2740 with no RTL text should look exactly the same as before.
2742 **** New buffer-local variable `bidi-display-reordering'.
2743 To disable display reordering in a buffer, change this to nil.
2745 **** New buffer-local variable `bidi-paragraph-direction'.
2746 If nil (the default), Emacs determines the base direction of each
2747 paragraph from its text, as specified by the UBA. Setting the value
2748 to `right-to-left' or `left-to-right' forces a base direction on each
2751 Paragraphs with right-to-left base direction are displayed starting at
2752 the right window edge.
2754 *** Enhanced support for characters with no glyphs in available fonts,
2755 or, on text terminals, characters that cannot be encoded by the
2756 terminal coding system. The new option `glyphless-char-display-control'
2757 specifies how to display them: as a hexadecimal code in a box, a thin
2758 1-pixel space, an empty box, etc.
2760 *** New input methods for Farsi and Bulgarian
2761 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2763 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2764 (U+2010 and U+2011).
2766 *** New Hebrew translation of the Emacs Tutorial.
2767 Type `C-u C-h t' to choose it in case your language setup doesn't
2768 automatically select it.
2770 ** An Emacs Lisp package manager is now included.
2771 This is a convenient way to download and install additional packages,
2772 from a package repository at http://elpa.gnu.org.
2774 *** M-x list-packages shows a list of packages, which can be
2775 selected for installation.
2777 *** New command `describe-package', bound to `C-h P'.
2779 *** By default, all installed packages are loaded automatically when
2780 Emacs starts up. To disable this, set `package-enable-at-startup' to
2781 nil. To specify the packages to load, customize `package-load-list'.
2783 ** Custom theme changes
2785 *** New command `M-x customize-themes', which provides a convenient
2786 interface for enabling and disabling Custom themes.
2788 *** New option `custom-theme-load-path' is the load path for themes.
2789 Emacs no longer looks for Custom themes in `load-path'. The default
2790 value of `custom-theme-load-path' says to look for themes in
2791 `custom-theme-directory', followed by a subdirectory of
2792 `data-directory' named "themes/", which contains a small selection of
2793 built-in Custom themes.
2795 *** New option `custom-safe-themes' records known-safe theme files.
2796 If a theme is not in this list, Emacs queries before loading it, and
2797 offers to save the theme to `custom-safe-themes' automatically. By
2798 default, all themes included in Emacs are treated as safe.
2800 ** Improved GTK integration
2802 *** GTK scroll-bars are now placed on the right by default.
2803 The function `set-scroll-bar-mode' can change this.
2805 *** GTK tool bars can have just text, just images or images and text.
2806 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2807 the default is taken from desktop settings.
2809 *** GTK tool bars can be placed on any edge of the frame.
2810 The frame-parameter tool-bar-position controls this. It takes the
2811 values top, left, right or bottom. The Options => Show/Hide menu has
2814 *** The default colors for selected text (the `region' face) are taken
2815 from the GTK theme when Emacs is built with GTK.
2817 *** Emacs uses GTK tooltips by default if built with GTK.
2818 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2820 ** Graphical interface changes
2822 *** On graphical displays, the mode-line no longer ends in dashes.
2823 Also, the first dash (which does not indicate anything) is just
2824 displayed as a space.
2826 *** `menu-bar-select-buffer-function' lets you choose another operation
2827 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2829 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2830 built with Xft. These fonts can be set via X resources, for example:
2831 Emacs.pane.menubar.font: Courier-12
2835 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2836 or if it receives a SIGINT signal in batch mode.
2838 *** `kill-emacs-hook' is now also run in batch mode.
2839 Third-party code which adds to `kill-emacs-hook' should check if they
2840 do the right thing in batch mode.
2842 ** Scrolling changes
2844 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2845 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2846 of buffer at first key-press (instead they move to top/bottom of buffer)
2847 when `scroll-error-top-bottom' is non-nil.
2849 *** New option `scroll-error-top-bottom' (see above).
2851 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2852 scroll a line instead of full screen.
2854 *** New property `scroll-command' should be set on a command's symbol to
2855 define it as a scroll command affected by `scroll-preserve-screen-position'.
2857 *** If you customize `scroll-conservatively' to a value greater than 100,
2858 Emacs will never recenter point in the window when it scrolls due to
2859 cursor motion commands or commands that move point (e.f., `M-g M-g').
2860 Previously, you needed to use `most-positive-fixnum' as the value of
2861 `scroll-conservatively' to achieve the same effect.
2863 *** "Aggressive" scrolling now honors the scroll margins.
2864 If you customize `scroll-up-aggressively' or
2865 `scroll-down-aggressively' and move point off the window, Emacs now
2866 scrolls the window so as to avoid positioning point inside the scroll
2869 ** Basic SELinux support has been added.
2870 This requires Emacs to be linked with libselinux at build time.
2872 *** Emacs preserves the SELinux file context when backing up.
2873 Also, the function `copy-file' has an extra optional argument for
2874 preserving SELinux context, and the return value of `backup-buffer'
2875 now includes the SELinux context.
2877 *** New functions `file-selinux-context' and `set-file-selinux-context'
2878 get and set the SELinux context of a file.
2882 *** `delete-by-moving-to-trash' now only affects commands that specify
2883 trashing. This avoids inadvertently trashing temporary files.
2885 *** Calling `delete-file' or `delete-directory' with a prefix argument
2886 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2888 ** File- and directory-local variable changes
2890 *** You can stop directory local vars from applying to subdirectories.
2891 Add an element (subdirs . nil) to the alist portion of any variables
2892 settings to indicate that the section should not apply to
2895 *** Directory local variables can apply to some file-less buffers.
2896 Affected modes include dired, vc-dir, and log-edit. For example,
2897 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2898 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2899 `hack-dir-local-variables-non-file-buffer' to support this.
2901 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2902 Instead, use "eval: (minor-mode 1)".
2904 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2905 to `inhibit-local-variables-regexps'. As the name suggests, it now
2906 applies to ALL file local variables, not just -*- lines. The
2907 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2912 *** The `quit-window' command now restores the last buffer displayed
2913 in the quitted window.
2915 *** Resizing an Emacs frame now preserves proportional window sizes,
2916 modulo restrictions like window minimum sizes and fixed-size windows.
2918 *** The behavior of `display-buffer' is now customizable in detail.
2920 **** New option `display-buffer-base-action' specifies a list of
2921 user-determined display "actions" (functions and optional arguments
2922 for choosing the displaying window).
2924 This takes precedence over the default display action, which is
2925 specified by `display-buffer-fallback-action'.
2927 **** New option `display-buffer-alist' maps buffer name regexps to
2928 display actions, taking precedence over `display-buffer-base-action'.
2930 *** New option `window-combination-limit'.
2931 The new option `window-combination-limit' allows to return the space
2932 obtained for resizing or creating a window more reliably to the window
2933 from which such space was obtained.
2935 *** New option `window-combination-resize'.
2936 The new option `window-combination-resize' allows to split a window that
2937 otherwise cannot be split because it's too small by stealing space from
2938 other windows in the same combination. Subsequent resizing or deletion
2939 of the window will resize all windows in the same combination as well.
2941 *** New option `frame-auto-hide-function' lets you choose between
2942 iconifying or deleting a frame when burying a buffer in a dedicated
2943 frame, or quitting a window showing a buffer in a frame of its own.
2945 *** New commands `maximize-window' and `minimize-window'.
2946 These maximize and minimize the size of a window within its frame.
2948 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2949 These functions allow to navigate through the live buffers that have
2950 been shown in a specific window.
2952 ** Minibuffer changes
2954 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2955 This is handy for minibuffer-only frames, and is also used for the feature
2956 where mouse-1 pops up *Messages*"', which can now easily be changed.
2958 *** Minibuffers set `truncate-lines' to nil.
2959 If you want to change the value to something else, you could use
2960 for example `minibuffer-setup-hook'.
2962 ** `auto-mode-case-fold' is now enabled by default.
2964 ** `backup-by-copying-when-mismatch' now defaults to t.
2966 ** New basic faces `error', `warning', `success'.
2967 These are used to highlight text indicating failure, caution or
2968 successful operation.
2970 ** New option `list-colors-sort' defines the color sort order
2971 for `list-colors-display'.
2973 ** The variable `focus-follows-mouse' now always defaults to nil.
2976 * Editing Changes in Emacs 24.1
2980 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2981 `isearch-yank-line'.
2983 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2984 `isearch-yank-kill'.
2986 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2988 ** New commands `count-words-region' and `count-words'.
2990 *** M-= is bound to `count-words-region', not `count-lines-region'.
2991 The `count-words-region' command, when called interactively, reports
2992 the number of lines, words, and characters in the region. It is a
2993 superset of the old `count-lines-region', which is now an obsolete
2996 ** The command `just-one-space' (M-SPC), if given a negative argument,
2997 also deletes newlines around point.
3001 *** New option `delete-active-region'.
3002 If non-nil, [delete] and DEL delete the region if it is active and no
3003 prefix argument is given. If set to `kill', those commands kill
3006 *** New command `delete-forward-char', bound to [delete].
3007 This is meant for interactive use, and obeys `delete-active-region'.
3008 The command `delete-char' does not obey `delete-active-region'.
3010 *** `delete-backward-char' is now a Lisp function.
3011 Apart from obeying `delete-active-region', its behavior is unchanged.
3012 However, the byte compiler now warns if it is called from Lisp; Lisp
3013 callers should use delete-char with a negative argument instead.
3015 *** The option `mouse-region-delete-keys' has been deleted.
3017 ** Selection changes.
3019 The default handling of clipboard and primary selections has been
3020 changed to conform with modern X applications. In short, most
3021 commands for killing and yanking text now use the clipboard, while
3022 mouse commands use the primary selection.
3024 In the following, we provide a list of these changes, followed by a
3025 list of steps to get the old behavior back if you prefer that.
3027 *** `select-active-regions' now defaults to t.
3028 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
3029 the kill ring. The selected text is put in the primary selection, if
3030 the system possesses a separate primary selection facility (e.g. X).
3032 **** `select-active-regions' also accepts a new value, `only'.
3033 This means to only set the primary selection for temporarily active
3034 regions (usually made by mouse-dragging or shift-selection);
3035 "ordinary" active regions, such as those made with C-SPC followed by
3036 point motion, do not alter the primary selection.
3038 **** `mouse-drag-copy-region' now defaults to nil.
3040 *** mouse-2 is now bound to `mouse-yank-primary'.
3041 This pastes from the primary selection, ignoring the kill-ring.
3042 Previously, mouse-2 was bound to `mouse-yank-at-click'.
3044 *** `x-select-enable-clipboard' now defaults to t on all platforms.
3046 *** `x-select-enable-primary' now defaults to nil.
3047 Thus, commands that kill text or copy it to the kill-ring (such as
3048 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
3050 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
3051 exactly equivalent to M-w, C-w, and C-y respectively.
3053 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
3054 non-nil by default, as Windows does not support the primary selection
3055 between applications.
3057 *** To return to the previous behavior, do the following:
3059 **** Change `select-active-regions' to nil.
3060 **** Change `mouse-drag-copy-region' to t.
3061 **** Change `x-select-enable-primary' to t (on X only).
3062 **** Change `x-select-enable-clipboard' to nil.
3063 **** Bind `mouse-yank-at-click' to mouse-2.
3065 *** Support for X cut buffers has been removed.
3067 *** X clipboard managers are now supported.
3068 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
3070 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
3071 in the current rectangle. With a prefix argument, this prompts for a
3072 number to count from and for a format string.
3074 ** `redisplay-dont-pause' now defaults to t.
3075 This makes Emacs feel more responsive to editing commands that arrive
3076 at high rate, e.g. if you lean on some key, because stopping redisplay
3077 in the middle (when this variable is nil) forces more expensive
3078 updates later on, and Emacs appears to be unable to keep up.
3080 ** The behavior of <TAB> for active regions in Text mode has changed.
3081 In Text and related modes, typing <TAB> (`indent-for-tab-command')
3082 when the region is active causes Emacs to indent all the lines in the
3083 region, aligning them with the line previous to the first line in the
3084 region (or with the left margin if there is no previous line).
3086 ** When `occur' is called with a prefix argument, matching strings are
3087 collected into the `*Occur*' buffer without line numbers. If there
3088 are parenthesized subexpressions in the specified regexp, `occur'
3089 reads replacement text that may contain \\& and \\N whose convention
3090 follows `replace-match'.
3093 * Changes in Specialized Modes and Packages in Emacs 24.1
3095 ** Archive Mode has basic support for browsing and updating 7z archives.
3099 *** BibTeX mode now supports biblatex.
3100 Use the variable `bibtex-dialect' to select different BibTeX dialects.
3101 `bibtex-entry-field-alist' is now an obsolete alias for
3102 `bibtex-BibTeX-entry-alist'.
3104 *** New command `bibtex-search-entries', bound to C-c C-a.
3106 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
3108 *** New variable `bibtex-search-entry-globally'.
3112 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
3114 *** The default browser used by the package is now the "xdg-open" program,
3115 on platforms that support it. This calls your desktop's preferred browser.
3119 *** Support for musical notes.
3121 *** Support for logarithmic units.
3123 *** No longer uses the tex prefix for TeX specific unit names when
3124 using TeX or LaTeX mode.
3126 *** New option to highlight selections using faces.
3128 *** `calc-histogram' has the option of using a vector to determine the bins.
3130 *** New "O" option prefix.
3132 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
3134 ** Calendar, Diary, and Appt
3136 *** Diary entries can contain non-printing "comments".
3137 See the variable `diary-comment-start'.
3139 *** Appointments can specify their individual warning times.
3140 See the variable `appt-warning-time-regexp'.
3142 *** The function specified by `appt-disp-window-function' may be passed
3143 lists of arguments if multiple appointments are due at similar times.
3144 If you are using a custom function for this, you should update it.
3146 *** New function `diary-hebrew-birthday'.
3148 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
3149 may no longer be nil, but must all be strings.
3151 *** The obsolete (since Emacs 22.1) method of enabling the appt
3152 package by adding `appt-make-list' to `diary-hook' has been removed.
3153 Use `appt-activate' instead.
3155 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
3156 appt-issue-message (use the function appt-activate)
3157 appt-visible/appt-msg-window (use the variable appt-display-format)
3159 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
3160 view-diary-entries, list-diary-entries, show-all-diary-entries
3164 *** New feature to "guess" the style in an existing buffer.
3165 The main entry point is M-x c-guess.
3167 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
3169 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
3170 Thus C-M-a will, by default, go to the beginning of the immediate function,
3173 *** "Macros with semicolons" can be registered for correct indentation.
3174 Where such a macro ends a line (no semicolon) the next statement is no longer
3175 parsed as a statement continuation.
3177 ** Comint and modes derived from it use the standard completion code.
3181 *** Compilation mode can be used without Font Lock mode.
3182 `compilation-parse-errors-function' is now obsolete.
3184 *** New variable `compilation-filter-start', which is bound while
3185 `compilation-filter-hook' runs. It records the start position of the
3186 text inserted by `compilation-filter'.
3188 *** `compilation-error-screen-columns' and `compilation-first-column'
3189 are obeyed in the editing buffer. So programming language modes can
3190 set them, whereas previously only the value in the *Compilation*
3195 *** Customize buffers now contain a search field.
3196 The search is performed using `customize-apropos'.
3197 To turn off the search field, set `custom-search-field' to nil.
3199 *** Options in customize group buffers start out hidden if not customized.
3200 Use the arrow to the left of the option name to toggle visibility.
3202 *** custom-buffer-sort-alphabetically now defaults to t.
3204 *** The color widget now has a "Choose" button, which allows you to
3205 choose a color via `list-colors-display'.
3209 *** It is now possible to access buses other than the default system
3212 *** The `dbus-register-method' and `dbus-register-property' functions
3213 optionally do not register names.
3215 *** The new function `dbus-register-service' registers a known service
3216 name on a D-Bus without also registering a property or a method.
3220 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3221 if called with a prefix argument, read a file name from the minibuffer
3222 instead of using the current buffer.
3224 *** The "dired local variables" feature of Dired-x is obsolete.
3225 The standard directory local variables feature replaces it.
3229 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3230 controlling attempts to autojoin a channel.
3232 *** New variable `erc-coding-system-precedence': If we use `undecided'
3233 as the server coding system, this variable will then be consulted.
3234 The default is to decode strings that can be decoded as utf-8 as
3235 utf-8, and do the normal `undecided' decoding for the rest.
3239 *** The default value of `eshell-directory-name' has changed
3240 to be an "eshell" directory in `user-emacs-directory'.
3241 The old "~/.eshell/" directory is still used if it exists, though.
3245 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3246 It now supports multithread non-stop debugging and simultaneous
3247 debugging of several threads.
3251 *** RET (`image-toggle-animation') toggles animation, if applicable.
3252 Animation plays once, unless the option `image-animate-loop' is non-nil.
3256 *** New command M-x info-display-manual displays a named Info manual.
3257 If that manual is already visited in some Info buffer, it displays
3258 that buffer. (This is handy if you have many manuals in many *info*
3259 buffers, and don't remember the name of the buffer visiting the manual
3260 you want to consult.) Otherwise, it loads and displays the manual.
3262 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3263 This is for compatibility with the stand-alone Info reader program,
3264 and also because `Info-edit' is a rarely used command that is disabled
3267 ** Mail mode changes (not Message mode)
3269 *** New command M-x mail-add-attachment for adding MIME attachments
3271 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3272 (Its name is misleading, since it has nothing to do with MIME
3273 attachments.) The old name is now an obsolete alias to the new name.
3275 ** MH-E has been updated to MH-E version 8.3.1.
3276 See MH-E-NEWS for details.
3278 ** Modula-2 mode provides auto-indentation.
3280 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3282 ** nXML mode no longer binds C-RET to `nxml-complete'.
3283 Completion is now performed via `completion-at-point', bound to C-M-i
3284 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3285 default), this performs tag completion.
3287 ** Org mode has been updated to version 7.8.09.
3288 See ORG-NEWS for details.
3290 ** Prolog mode has been completely revamped, with lots of additional
3291 functionality such as more intelligent indentation, electricity,
3292 support for more variants, including Mercury, and a lot more.
3296 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3297 in the Rmail incoming message.
3299 *** The variable `rmail-message-filter' no longer has any effect.
3300 This change was made in Emacs 23.1 but was not advertised at the time.
3301 Try using `rmail-show-message-hook' instead.
3305 *** M-x shell prompts for the shell path name if the default directory
3306 is a remote file name and neither the environment variable $ESHELL nor
3307 the variable `explicit-shell-file-name' is set.
3309 *** TAB is now bound to the standard `completion-at-point' command,
3310 which now implements the pcomplete rules for shell command completion.
3314 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3315 if the mail server supports them. This uses either built-in GnuTLS
3316 support, or the starttls.el library. Customize `smtpmail-stream-type'
3319 *** The variable `smtpmail-auth-credentials' has been removed.
3320 By default, the information is now stored in the file ~/.authinfo.
3321 This was the default value of smtpmail-auth-credentials. If you had
3322 customized smtpmail-auth-credentials to a list of user names and
3323 passwords, those settings are not used. During your first connection
3324 to the smtp server, Emacs will prompt for the user name and password,
3325 and offer to save them to ~/.authinfo. Or you can manually copy the
3326 credentials to ~/.authinfo. For example, if you had
3328 (setq smtpmail-auth-credentials
3329 '(("mail.example.org" 25 "jim" "s!cret")))
3331 then the equivalent line in ~/.authinfo would be
3333 machine mail.example.org port 25 login jim password s!cret
3335 See the auth-source manual for more information, e.g. on encrypting
3336 the credentials file.
3338 *** The variable `smtpmail-starttls-credentials' has been removed.
3339 If you had that set, you need to put
3341 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3343 in your ~/.authinfo file instead.
3345 *** SMTPmail defaults to using the address in the From: header as the
3346 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3347 to the address you wish to use instead.
3351 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3352 and `sql-oracle-scan-on'.
3354 *** New options controlling prompting for login parameters.
3355 Each supported product has a custom variable `sql-*-login-params',
3356 which is a list of the parameters to be prompted for before a
3357 connection is established.
3359 *** The command `sql-product-interactive' now takes a prefix argument,
3360 which causes it to prompt for an SQL product.
3362 *** Product-specific SQL interactive commands now take prefix arguments.
3363 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3364 given a prefix argument, prompt for a name for the SQL interactive
3365 buffer. This reduces the need for calling `sql-rename-buffer'.
3367 *** SQL interactive modes suppress command continuation prompts, and
3368 replace tabs with spaces. The first change impacts multiple line SQL
3369 statements entered with C-j between each line, statements yanked into
3370 the buffer and statements sent with `sql-send-*' functions. The
3371 second prevents the MySQL and Postgres interpreters from listing
3372 object name completions when sent text via `sql-send-*' functions.
3374 *** New command `sql-connect' starts a predefined SQLi session,
3375 using the login parameters from `sql-connection-alist'.
3377 *** New "Save Connection" menu item in SQLi buffers.
3378 This gathers the login params specified for the SQLi session, if it
3379 was not started by a connection, and saves them as a new connection.
3381 *** New commands for listing database objects and details:
3382 sql-list-all and sql-list-table.
3384 *** An API for manipulating SQL product definitions has been added.
3388 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3392 *** New inline access method "ksu" (kerberized su).
3394 *** The following access methods are discontinued: "ssh1_old",
3395 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3397 *** The user option `remote-file-name-inhibit-cache' controls whether
3398 remote file attributes are cached for better performance.
3400 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3401 default value to "".
3403 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3404 for remote machines which support SELinux.
3406 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3407 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3408 the degree of parallelism.
3410 ** VC and related modes
3412 *** Support for pulling on distributed version control systems.
3413 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3414 supported (currently with Bzr, Git, and Mercurial), to update the
3415 current branch and working tree. A prefix argument means to prompt
3416 the user for specifics, e.g. a pull location.
3418 *** `vc-update' is now an alias for `vc-pull'.
3420 *** Support for merging on distributed version control systems.
3421 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3422 is supported (currently with Bzr, Git, and Mercurial), to merge
3423 changes from another branch into the current one. It prompts for
3424 specifics, e.g. a merge source.
3426 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3427 shows a diff while querying the user. It defaults to t.
3429 *** Log entries in some Log View buffers can be toggled to display a
3430 longer description by typing RET (log-view-toggle-entry-display).
3431 This is currently supported for Bzr, Git, and Mercurial (to support
3432 another backend, define a `log-view-expanded-log-entry-function').
3433 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3434 use this to display the full log entry for the revision at point.
3436 *** New command `vc-ediff' allows visual comparison of two revisions
3437 of a file similar to `vc-diff', but using ediff backend.
3439 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3440 this was not advertised at the time.
3442 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3443 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3444 this was not advertised at the time.
3450 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3452 *** partial-completion-mode (complete.el) is obsolete.
3453 You can get a comparable behavior with:
3454 (setq completion-styles '(partial-completion initials))
3455 (setq completion-pcm-complete-word-inserts-delimiters t)
3457 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3459 *** pgg is obsolete (use EasyPG instead).
3461 *** sregex.el is obsolete, since rx.el is a strict superset.
3463 *** s-region.el and pc-select.el are obsolete.
3464 They are superseded by shift-select-mode, enabled by default since 23.1.
3466 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3470 *** The Landmark game is now invoked with `landmark', not `lm'.
3471 Its functions and variables have been similarly renamed.
3473 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3474 (This interfered with cua-mode.)
3476 *** f90.el has some support for Fortran 2008 syntax.
3478 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3480 *** New command `nato-region' converts text to NATO phonetic alphabet.
3483 * New Modes and Packages in Emacs 24.1
3485 ** Occur Edit mode applies edits made in *Occur* buffers to the
3486 original buffers. It is bound to "e" in Occur mode.
3488 ** New global minor mode electric-pair-mode.
3489 When enabled, typing an open parenthesis automatically inserts the
3490 matching closing one.
3492 ** New global minor mode electric-indent-mode.
3493 When enabled, typing certain characters triggers reindentation.
3494 Major modes wishing to use this can set electric-indent-chars or
3495 electric-indent-functions.
3497 ** New global minor mode electric-layout-mode.
3498 When enabled, typing certain characters automatically inserts newlines.
3499 Major modes wishing to use this can set electric-layout-rules.
3501 ** tabulated-list.el provides a generic major mode for tabulated data,
3502 from which other modes can be derived.
3504 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3506 ** secrets.el is an implementation of the Secret Service API, an
3507 interface to password managers like GNOME Keyring or KDE Wallet. The
3508 Secret Service API requires D-Bus for communication. The command
3509 `secrets-show-secrets' offers a buffer with a visualization of the
3512 ** notifications.el provides an implementation of the Desktop
3513 Notifications API. It requires D-Bus for communication.
3515 ** soap-client.el supports access to SOAP web services from Emacs.
3516 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3518 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3520 ** New emacs-lock.el package.
3521 The previous version has been moved to obsolete/old-emacs-lock.el.
3522 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3523 against exiting Emacs and killing the buffer can be set separately.
3524 The mechanism for automatically turning off protection for buffers
3525 with dead inferior processes has been generalized.
3528 * Incompatible Lisp Changes in Emacs 24.1
3530 ** Passing a nil argument to a minor mode function call now ENABLES
3531 the minor mode unconditionally. This is so that you can write e.g.
3533 (add-hook 'text-mode-hook 'foo-mode)
3535 to enable foo-mode in Text mode buffers, removing the need for
3536 `turn-on-foo-mode' style functions. This affects all mode commands
3537 defined by `define-minor-mode'. If called interactively, the mode
3538 command still toggles the minor mode.
3540 ** The return value of `backup-buffer' has changed.
3541 It is now a list of three elements, where the second element is a list
3542 describing the original file's SELinux context. If Emacs or the
3543 system lacks SELinux support, the context list is (nil nil nil nil).
3544 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3546 ** `char-direction-table' and the `char-direction' function were deleted.
3547 They were buggy and inferior to the new support of bidirectional
3548 editing introduced in Emacs 24. If you need the bidirectional
3549 properties of a character, use `get-char-code-property' with the last
3550 argument `bidi-class'.
3552 ** `copy-directory' now copies the source directory as a subdirectory
3553 of the target directory, if the latter is an existing directory. The
3554 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3555 the contents directly into a pre-existing target directory.
3557 ** For mouse click input events in the text area, the Y pixel
3558 coordinate in the POSITION list now counts from the top of the text
3559 area, excluding any header line. Previously, it counted from the top
3562 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3563 been further reduced. Now a backquote not followed by a space is
3564 always treated as a "new-style" backquote. Please remove all
3565 "old-style" backquotes from your code. If your code uses backquotes
3566 as documented in the Elisp manual, and compiles without warning, then
3567 you have nothing to do in this regard. Code not following the
3568 appropriate conventions may fail to compile.
3570 The most common cause of trouble seems to be an old-style backquote
3571 followed by a newline. Another cause of trouble is vector notation
3572 for key sequence notation: instead of [(control ,)] and [(control ')],
3573 you should write [(control ?,)] and [(control ?')], which will work in
3576 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3577 was not advertised at the time. The function `custom-initialize-delay'
3578 replaced all known uses.
3580 ** `view-buffer' now treats special mode-class in the same way that
3581 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3582 major mode is special).
3584 ** Menu and tool bar changes
3586 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3587 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3588 With these alist entries omitted, `make-frame' checks the value of the
3589 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3590 a menu-bar or tool-bar, respectively. If the alist entries are added,
3591 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3593 *** The menu bar bindings's caches are not used any more.
3594 Use (where-is-internal <def> nil t) instead.
3596 ** Regions created by mouse dragging are now normal active regions,
3597 similar to those created by shift-selection (see Selection changes
3598 above). In previous Emacs versions, these regions were delineated by
3599 `mouse-drag-overlay'; that variable has been removed.
3601 ** The fourth argument of `filter-buffer-substring' has been removed.
3602 If you want to remove text properties from the final result, simply
3603 pass the result through substring-no-properties.
3605 ** cl.el no longer provides `cl-19'.
3607 ** The following obsolete functions and aliases have been removed
3608 (the appropriate new function is given in parentheses; "not needed"
3609 means you can just remove all calls to the function in question):
3611 *** `comint-kill-output' (`comint-delete-output')
3612 *** `decompose-composite-char' (`char-to-string')
3613 *** `outline-visible' (`outline-invisible-p')
3614 *** `internal-find-face' (`facep')
3615 *** `internal-get-face' (`facep and check-face')
3616 *** `frame-update-faces' (not needed)
3617 *** `frame-update-face-colors' (`frame-set-background-mode')
3618 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3619 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3620 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3621 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3622 *** `x-make-font-unbold' (`make-face-unbold')
3623 *** `x-make-font-unitalic' (`make-face-unitalic')
3624 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3625 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3626 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3627 *** `char-bytes' (== 1)
3628 *** `isearch-return-char' (`isearch-printing-char')
3629 *** `make-local-hook' (not needed)
3630 *** `set-screen-height' (`set-frame-height')
3631 *** `set-screen-width' (`set-frame-width')
3633 ** The following obsolete variables and varaliases have been removed
3634 (the appropriate new variable is given in parentheses):
3636 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3637 *** `vc-header-alist' (`vc-BACKEND-header')
3638 *** `directory-sep-char' (== ?/)
3639 *** `font-lock-defaults-alist' (`font-lock-defaults')
3640 *** `e' (`float-e').
3642 ** The following obsolete files were removed:
3643 sc.el, x-menu.el, rnews.el, rnewspost.el
3645 ** The format of the finder-inf.el file has changed, since the Finder
3646 mechanism is now based on the package system. The variable
3647 `finder-package-info' is replaced by `package--builtins' and
3648 `finder-keywords-hash'.
3650 ** When generating autoloads, `update-directory-autoloads' no longer
3651 assumes every inspected file is in your `load-path'. It instead
3652 generates relative names according to the current `load-path'.
3655 * Lisp Changes in Emacs 24.1
3657 ** Code can now use lexical scoping by default instead of dynamic scoping.
3658 The `lexical-binding' variable enables lexical scoping for local
3659 variables. It is typically set via a file-local variable in the first
3660 line of the file, in which case it applies to all the code in that
3663 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3664 binding instead of the old dynamic binding mode.
3666 *** Lexically scoped interpreted functions are represented with a new form
3667 of function value which looks like (closure ENV ARGS &rest BODY).
3669 *** New macro `letrec' to define recursive local functions.
3671 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3672 So do `defcustom' and other forms that call `defvar' as a subroutine.
3674 *** New function `special-variable-p' to check whether a variable is
3675 declared as dynamically bound.
3677 *** The form ((lambda ...) ...) is deprecated.
3679 ** An Emacs Lisp testing tool is now included.
3680 Emacs Lisp developers can use this tool to write automated tests for
3681 their code. See the ERT info manual for details.
3683 ** Changes for bidirectional display and editing
3685 *** New function `current-bidi-paragraph-direction'.
3686 This returns the base direction of the paragraph at point.
3688 *** New function `bidi-string-mark-left-to-right'.
3689 Given a string containing characters from right-to-left scripts, this
3690 function returns another string which can be safely inserted into a
3691 buffer, such that any following text will be always displayed to the
3692 right of that string. (This works by appending an invisible Unicode
3693 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3695 This is useful when the buffer has overall left-to-right paragraph
3696 direction and you need to insert a string whose contents are not known
3697 in advance, without disrupting the layout of the line.
3701 *** Window tree functions are accessible in Elisp.
3702 Functions are provided to return the parent, siblings or child windows
3703 of any window including internal windows (windows not associated with a
3704 buffer) in the window tree.
3706 **** New function `window-valid-p' gives non-nil for live and internal
3709 **** Window manipulation can deal with internal windows.
3710 Many window handling functions like `split-window', `delete-window', or
3711 `delete-other-windows' as well as the window resizing functions can now
3712 act on any window including internal ones.
3714 *** window-total-height/-width vs window-body-height/-width.
3715 The function `window-height' has been renamed to `window-total-height'
3716 and `window-width' has been renamed to `window-body-width'. The old
3717 names are provided as aliases. Two new functions `window-total-width'
3718 and `window-body-height' are provided.
3720 *** Window parameters specific to window handling functions.
3721 For each window you can specify a parameter to override the default
3722 behavior of a number of functions like `split-window', `delete-window'
3723 and `delete-other-windows'. The variable `ignore-window-parameters'
3724 allows to ignore processing such parameters.
3726 *** New semantics of third argument of `split-window'.
3727 The third argument of `split-window' has been renamed to SIDE and can be
3728 set to any of the values 'below, 'right, 'above, or 'left to make the
3729 new window appear on the corresponding side of the window that shall be
3730 split. Any other value of SIDE will cause `split-window' to split the
3731 window into two side-by-side windows as before.
3733 *** Window resizing functions.
3734 A new standard function for resizing windows called `window-resize' has
3735 been introduced. This and all other functions for resizing windows no
3736 longer delete any windows when they become too small.
3738 *** Deleting the selected window now selects the most recently selected
3739 live window on that frame instead.
3741 *** `adjust-window-trailing-edge' adjustments.
3742 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3743 is able to resize other windows if a window adjacent to the trailing
3744 edge cannot be shrunk any more. This makes its behavior more similar to
3745 that of Emacs 21 without compromising, however, its inability to delete
3746 windows which was introduced in Emacs 22.
3748 *** Window-local buffer lists.
3749 Windows now have local buffer lists. This means that removing a buffer
3750 from display in a window will preferably show the buffer previously
3751 shown in that window with its previous window-start and window-point
3752 positions. This also means that the same buffer may be automatically
3753 shown twice even if it already appears in another window.
3755 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3756 which if non-nil requires the buffer to be displayed in the currently
3757 selected window, signaling an error otherwise. If nil, another window
3758 can be used, e.g. if the selected one is strongly dedicated.
3760 *** `split-window-vertically' and `split-window-horizontally' renamed
3761 to `split-window-below' and `split-window-right' respectively.
3762 The old names are kept as aliases.
3766 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3767 named ACTION, and takes a display action of the same form as
3768 `display-buffer-base-action' (see Changes, above). A non-nil,
3769 non-list value is treated specially, as the old meaning.
3771 **** New variable `display-buffer-overriding-action'.
3773 **** The procedure of `display-buffer' etc. to choose a window is
3774 determined by combining `display-buffer-overriding-action',
3775 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3776 and `display-buffer-fallback-action'. The second and fourth of these
3777 are user-customizable variables.
3779 See the docstring of `display-buffer' for details.
3781 *** New functions `window-state-get' and `window-state-put'.
3782 These functions allow to save and restore the state of an arbitrary
3783 frame or window as an Elisp object.
3787 *** New variable `completion-extra-properties' used to specify extra
3788 properties of the current completion:
3789 - :annotate-function, same as the old completion-annotate-function.
3790 - :exit-function, function to call after completion took place.
3792 *** Functions on `completion-at-point-functions' can return any of the
3793 properties valid for `completion-extra-properties'.
3795 *** `completion-annotate-function' is obsolete.
3797 *** New `metadata' method for completion tables. The metadata thus returned
3798 can specify various details of the data returned by `all-completions':
3799 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3800 used to select a style in completion-category-overrides.
3801 - `annotation-function' to add annotations in *Completions*.
3802 - `display-sort-function' to specify how to sort entries in *Completions*.
3803 - `cycle-sort-function' to specify how to sort entries when cycling.
3805 *** `minibuffer-local-filename-must-match-map' is not used any more.
3806 Instead, the bindings in `minibuffer-local-filename-completion-map'
3807 are combined with `minibuffer-local-must-match-map'.
3809 *** New variable `completing-read-function' allows overriding the
3810 behavior of `completing-read'.
3812 ** `glyphless-char-display' can now distinguish between graphical and
3813 text terminal display, via a char-table entry that is a cons cell.
3815 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3816 Instead, the offending function is removed.
3820 *** New function `run-hook-wrapped' for running an abnormal hook by
3821 passing the hook functions as arguments to a "wrapping" function.
3822 Like `run-hook-with-args-until-success', it stops at the first
3823 non-nil return value.
3825 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3826 set of "wrapping" filters, similar to around advice.
3827 (A version of this macro was actually added in Emacs 23.2 but was not
3828 advertised at the time.)
3832 *** New macro `condition-case-unless-debug' (this was actually added in
3833 Emacs 23.1 as condition-case-no-debug, but not advertised)
3835 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3837 *** Variable `stack-trace-on-error' removed.
3839 *** The debugger can now "continue" from an error, which means it will
3840 jump to the error handler as if the debugger had not been invoked
3841 instead of jumping all the way to the top-level.
3843 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3844 This can be useful when `inhibit-quit' is set.
3846 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3847 named Emacs server instances.
3849 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3850 to redirect STDOUT to a file.
3852 ** The function `format-time-string' now supports the %N directive,
3853 for higher-resolution time stamps.
3855 ** New input reading functions
3857 *** New function `read-char-choice' reads a restricted set of
3858 characters, discarding any inputs not inside the set.
3860 *** The command `read-color' now requires a match for a color name
3861 or RGB triplet, instead of signaling an error if the user provides
3864 **** `facemenu-read-color' is now an alias for `read-color'.
3866 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3867 The variable is now used to load all kind of supported dynamic libraries,
3868 not just image libraries. The previous name is still available as an
3871 ** Syntax parsing changes
3873 *** New variable `syntax-propertize-function'.
3874 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3875 This allows syntax-table properties to be set independently from font-lock:
3876 just call syntax-propertize to make sure the text is propertized.
3877 Together with this new variable come a new hook
3878 syntax-propertize-extend-region-functions, as well as two helper functions:
3879 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3880 as-is; and syntax-propertize-rules which provides a new way to specify
3883 *** Syntax tables support a new "comment style c" additionally to style b.
3885 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3887 ** frame-local variables cannot be let-bound any more.
3889 ** Major and minor mode changes
3891 *** `set-auto-mode' now respects mode: local variables at the end of files,
3892 as well as those in the -*- line.
3894 *** `prog-mode' is a new major mode from which programming modes
3897 **** `prog-mode-hook' can be used to enable features for programming
3898 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3899 on-the-fly spell checking for comments and strings.
3901 *** New hook `change-major-mode-after-body-hook', run by
3902 `run-mode-hooks' just before any other mode hooks.
3904 *** Enabled globalized minor modes can be disabled in specific major modes.
3905 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3906 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3908 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3910 ** File-handling changes
3912 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3913 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3914 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3915 argument is supplied (see Trash changes, above).
3917 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3919 ** Tool-bars can display separators.
3920 Tool-bar separators are handled like menu separators in menu-bar maps,
3921 i.e. via menu entries of the form `(menu-item "--")'.
3925 *** Animated images support (currently animated gifs only).
3927 **** `image-animated-p' returns non-nil if an image can be animated.
3929 **** `image-animate' animates a supplied image spec.
3931 **** `image-animate-timer' returns the timer object for an image that
3934 *** `image-extension-data' has been renamed to `image-metadata'.
3935 The old name is an obsolete alias to the new one.
3937 *** Image mode can view any image type that ImageMagick supports.
3938 This requires Emacs to be built with ImageMagick support.
3940 **** New function `imagemagick-types', defined if ImageMagick support
3941 is enabled, returns a list of image file extensions that your
3942 ImageMagick installation supports.
3944 **** New function `imagemagick-register-types' enables ImageMagick
3945 image types in Image mode and in `create-image' and other helper
3948 **** New option `imagemagick-types-inhibit' excludes certain
3949 ImageMagick image types from `imagemagick-register-types'.
3951 **** With ImageMagick support, there are extra Image mode commands to
3952 resize and rotate images: `image-transform-fit-to-height',
3953 `image-transform-fit-to-width', `image-transform-set-rotation', and
3954 `image-transform-set-scale'.
3956 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3957 passes it to the mail user agent function. This argument specifies an
3958 action for returning to the caller after finishing with the mail. For
3959 example, this is used by Rmail to optionally delete a mail window.
3961 ** XML and HTML parsing
3962 If Emacs is compiled with libxml2 support, there are two new
3963 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3964 and `libxml-parse-xml-region' (which parses XML). Both return an
3965 Emacs Lisp parse tree.
3967 ** Networking and encryption changes
3969 *** `open-network-stream' can now be used to open an encrypted stream.
3970 It now accepts an optional `:type' parameter for initiating a TLS
3971 connection, directly or via STARTTLS. To do STARTTLS, additional
3972 parameters (`:end-of-command', `:success', `:capabilities-command')
3973 must also be supplied.
3975 *** New library gnutls.el.
3976 The new function `gnutls-available-p' returns non-nil if Emacs is
3977 built with GnuTLS support. The main entry points are
3978 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3979 these functions through `open-network-stream', because that can
3980 upgrade connections through STARTTLS opportunistically or use plain
3981 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3984 *** New primitive `secure-hash' that supports many secure hash algorithms:
3985 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3986 sha1.el has been removed. The `sha1' feature is provided by default.
3990 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3992 ** Progress reporters can now "spin".
3993 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3994 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3995 time you call `progress-reporter-update' on that progress reporter,
3996 with a nil or omitted VALUE argument, the reporter message is
3997 displayed with a "spinning bar".
3999 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
4000 being reverted, even if the buffer has a local `revert-buffer-function'.
4002 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
4003 If delayed-warnings-list is non-nil, the command loop calls
4004 `delayed-warnings-hook' after `post-command-hook'. At present, this
4005 is only used by Emacs on some platforms to display warnings during
4006 startup, which might otherwise not be noticed. This uses the
4007 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
4009 ** rx.el has a new `group-n' construct for explicitly numbered groups.
4011 ** New function `make-composed-keymap' that constructs a new keymap
4012 from multiple input maps. You can use this to make a keymap that
4013 inherits from multiple maps, eg:
4014 (set-keymap-parent newmap (make-composed-keymap othermap parent))
4016 ** New function `string-prefix-p'.
4017 (This was actually added in Emacs 23.2 but was not advertised at the time.)
4019 ** New reader macro ## that stands for the empty symbol.
4020 This means that the empty symbol can now be read back. Also, #: by itself
4021 (when not immediately followed by a possible symbol character) stands for
4022 an empty uninterned symbol.
4024 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
4026 ** The following functions and variables are obsolete:
4028 *** `tooltip-use-echo-area' is obsolete.
4029 Rather than setting this to t, disable Tooltip mode instead.
4031 *** buffer-substring-filters is obsolete.
4032 Use `filter-buffer-substring-functions' instead.
4034 *** `byte-compile-disable-print-circle' is obsolete.
4036 *** `deferred-action-list' and `deferred-action-function' are obsolete.
4037 Use `post-command-hook' instead.
4039 *** `font-lock-maximum-size' is obsolete.
4042 * Changes in Emacs 24.1 on Non-Free Operating Systems
4044 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
4045 and also when HOME is set to C:\ by default.
4047 ** New configure.bat options
4049 *** --enable-checking builds Emacs with extra runtime checks.
4051 *** --distfiles specifies files to be included in binary distribution.
4053 *** --without-gnutls disables automatic GnuTLS detection.
4055 *** --lib for general library linkage, works with the USER_LIBS build variable.
4057 ** New make target `dist' to create binary distribution for MS Windows.
4059 ** The Lisp function `w32-default-color-map' is now obsolete.
4060 (It is only used internally in the Emacs C code.)
4062 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
4063 reappear on mouse-over. (Requires OS X 10.6 or later.)
4065 ** On Mac OS X, dragging a file into Emacs visits the file, like on
4066 other platforms, rather than inserting its contents into the buffer.
4069 ----------------------------------------------------------------------
4070 This file is part of GNU Emacs.
4072 GNU Emacs is free software: you can redistribute it and/or modify
4073 it under the terms of the GNU General Public License as published by
4074 the Free Software Foundation, either version 3 of the License, or
4075 (at your option) any later version.
4077 GNU Emacs is distributed in the hope that it will be useful,
4078 but WITHOUT ANY WARRANTY; without even the implied warranty of
4079 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
4080 GNU General Public License for more details.
4082 You should have received a copy of the GNU General Public License
4083 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
4088 paragraph-separate: "[
\f]*$"