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 24.4
28 ** Emacs can now be compiled with ACL support.
29 This happens by default if a suitable support library is found at
30 build time, like libacl on GNU/Linux. To prevent this, use the
31 configure option `--disable-acl'. See below for related features.
34 ** Emacs can now be compiled with file notification support.
35 This happens by default if a suitable system library is found at
36 build time. To prevent this, use the configure option
37 `--without-file-notification'. See below for file-notify features.
38 This feature is not available for the Nextstep port.
41 ** Emacs can now be compiled with zlib support.
42 This happens by default if zlib is present, which it normally is.
43 To prevent this, use the configure option `--without-zlib'.
44 This provides the function `zlib-decompress-region'; see below for details.
47 ** The configure option `--without-compress-info' has been generalized,
48 and renamed to `--without-compress-install'. It now prevents compression
49 of _any_ files during installation.
52 ** The configure option `--with-crt-dir' has been removed.
53 It is no longer needed, as the crt*.o files are no longer linked specially.
56 ** Directories passed to configure option `--enable-locallisppath' are
57 no longer created during installation.
60 ** Emacs for NS (Mac OS X, GNUstep) can be built with ImageMagick support.
61 This requires pkg-config to be available at build time.
64 * Startup Changes in Emacs 24.4
67 ** When initializing `load-path', an empty element in the EMACSLOADPATH
68 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
69 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
70 load-path (the one that would have been used if EMACSLOADPATH was unset).
71 This makes it easier to _extend_ the load-path via EMACSLOADPATH
72 (previously, EMACSLOADPATH had to specify the complete load-path,
73 including the defaults). (In older versions of Emacs, an empty element
74 was replaced by ".", so use an explicit "." now if that is what you want.)
77 ** The -L option, which normally prepends its argument to load-path,
78 will instead append, if the argument begins with `:' (or `;' on MS Windows;
79 i.e., `path-separator').
82 ** If you use either site-load.el or site-init.el to customize the dumped
83 Emacs executable, any changes to `load-path' that these files make
84 will no longer be present after dumping. To affect a permanent change
85 to `load-path', use the `--enable-locallisppath' option of `configure'.
88 ** The user option `initial-buffer-choice' can now specify a function
89 to set up the initial buffer.
92 * Changes in Emacs 24.4
95 ** New function `zlib-decompress-region', which decompresses gzip- and
96 zlib-format compressed data using built-in zlib support, if available.
99 ** New option `gnutls-verify-error', if non-nil, means that Emacs
100 should reject SSL/TLS certificates that GnuTLS determines as invalid.
101 (This option defaults to nil at present, but this is expected to change
102 in a future release.)
105 ** Emacs now supports menus on text-mode terminals.
106 If the terminal supports a mouse, clicking on the menu bar, or on
107 sensitive portions of the mode line or header line, will drop down the
108 menu defined at that position. Likewise, clicking C-mouse-2 or
109 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
112 If the text terminal does not support a mouse, you can activate the
113 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
115 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
116 customize the option `tty-menu-open-use-tmm' to a non-nil value.
117 (Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
121 ** The *Messages* buffer is created in `messages-buffer-mode',
122 a new major mode, with read-only status. Any code that might create
123 the *Messages* buffer should call the function `messages-buffer' to do
124 so and set up the mode.
127 ** Emacs can now support ACLs (access control lists).
128 This requires a suitable support library to be found at build time.
129 On GNU/Linux, the POSIX ACL interface is used via libacl.
130 On MS-Windows, the NT Security APIs are used to emulate the POSIX interface.
133 *** Emacs preserves the ACL entries of files when backing up.
135 *** New functions `file-acl' and `set-file-acl' get and set the ACL
138 ** Multi-monitor support has been added.
141 *** New functions `display-monitor-attributes-list' and
142 `frame-monitor-attributes' can be used to obtain information about
143 each physical monitor on multi-monitor setups.
145 *** The functions `display-pixel-width' and `display-pixel-height' now
146 behave consistently among the platforms: they return the pixel width
147 or height for all physical monitors associated with the given display
148 as if they were on X11. To get information for each physical
149 monitor, use the new functions above. Similar notes also apply to
150 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
151 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
154 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
155 You can change the default by customizing `blink-cursor-blinks'.
158 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
159 This affects View mode, etc.
164 *** The command `apropos-variable' is renamed to `apropos-user-option'.
165 `apropos-user-option' shows all user options while `apropos-variable'
166 shows all variables. When called with a universal prefix argument,
167 the two commands swap their behaviors. When `apropos-do-all' is
168 non-nil, they output the same results.
171 *** The key `?' now describes prefix bindings, like `C-h'.
174 *** The command `describe-function' has been extended for EIEIO.
175 Running it on constructors will show a full description of the
176 generated class. For generic functions, it will show all
177 implementations together with links to the source. The old commands
178 `describe-class', `describe-constructor' and `describe-generic' were
182 *** The function `quail-help' is no longer an interactive command.
183 Use `C-h C-\' (`describe-input-method') instead.
188 *** ImageMagick images now support the :max-width and :max-height keywords.
191 *** When using `create-image' with image data, you can pass a :format
192 attribute (via the property-list argument) in order to help
193 ImageMagick detect the image type. The value should be a MIME
194 content-type that is found in the new variable `image-format-suffixes'.
196 ** Frame and window changes
199 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
200 bound to <f11> and M-<f10>, respectively.
203 *** New hooks `focus-in-hook', `focus-out-hook'.
204 These are normal hooks run when an Emacs frame gains or loses input focus.
206 *** Emacs can now change frame sizes in units of pixels, rather than
207 text rows or columns. When maximizing a frame or making it fullscreen,
208 remaining extra pixels are no longer given to the minibuffer, the rightmost
209 fringe, or other unusable space, but are distributed among the text
210 areas of the frame's windows. If the new option `frame-resize-pixelwise'
211 is non-nil, all frame size changes happen pixelwise and set the
212 corresponding size hints for the window manager.
214 *** Emacs can now change window sizes in units of pixels.
215 Mouse-dragging a mode line or window divider now changes the size of
216 adjacent windows pixelwise. If the new option `window-resize-pixelwise'
217 is non-nil, functions like `balance-windows-area' and `fit-window-to-buffer'
218 resize windows pixelwise. Most functions for changing or accessing
219 window sizes now have an additional argument that allows changes to apply,
220 or values to be returned, in pixels instead of lines/columns.
222 *** Emacs can now draw dividers between adjacent windows. To put
223 dividers between side-by-side/vertically stacked windows customize the
224 frame parameters `right-divider-width' and `bottom-divider-width' to
225 some positive integer. You can drag dividers with the mouse (they show
226 a corresponding cursor when the mouse hovers over them). You can change
227 the appearance of dividers by customizing the faces `window-divider',
228 `window-divider-first-pixel', and `window-divider-last-pixel'. The last
229 two are useful to provide a 3D effect, or to better distinguish dividers
230 from surrounding display objects.
232 *** New functions are provided to return the pixel sizes of window
233 components, namely `window-scroll-bar-width', `window-mode-line-height'
234 `window-header-line-height', `window-right-divider-width' and
235 `window-bottom-divider-width'.
237 *** The new function `window-text-pixel-size' returns the size of the
238 text of a window's buffer in pixels. This allows functions like
239 `fit-frame-to-buffer' and `fit-window-to-buffer' to accurately fit a
240 window to its buffer as it will be displayed.
242 *** `fit-window-to-buffer' can now resize windows horizontally.
243 This behavior is controlled by the new option
244 `fit-window-to-buffer-horizontally'.
246 *** `fit-frame-to-buffer' can now fit frames in both directions.
247 This behavior is controlled by the option `fit-frame-to-buffer' which
248 tells in which direction(s) the frame shall be fit. The new options
249 `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes' allow to
250 control the size of the frame and its position on screen.
252 *** Temp Buffer Resize Mode can now adjust height and width of windows
253 and frames. `temp-buffer-resize-mode' is now able to adjust the height
254 and the width of a window displaying a temporary buffer. The new option
255 `temp-buffer-max-width' allows to control the width of temporary buffer
256 windows. Moreover, if the new option `fit-frame-to-buffer' is non-nil
257 and the buffer appears in the root window of a frame, Temp Buffer Resize
258 Mode will try to adjust width and/or height of the frame.
261 *** `split-window' is now a non-interactive function, not a command.
262 As a command, it was a special case of `C-x 2' (`split-window-below'),
263 and as such superfluous. After being reimplemented in Lisp, its
264 interactive form was mistakenly retained.
267 *** The functions `window-size' and `window-total-size' now have an
268 optional argument to return a rounded size value.
271 *** `window-state-put' now allows to put a window state into internal
275 *** New option `scroll-bar-adjust-thumb-portion'.
276 Available only on X, this option allows to control over-scrolling
277 using the scroll bar (i.e. dragging the thumb down even when the end
278 of the buffer is visible).
281 *** New basic action function `display-buffer-in-previous-window' has
282 `display-buffer' display a buffer in a window previously showing that
286 *** New basic action function `display-buffer-at-bottom' has
287 `display-buffer' choose or make a window at the bottom of the selected
290 *** New display action function `display-buffer-no-window' to not
291 display the buffer in a window.
293 *** New display action alist entry `allow-no-window' to indicate the
294 caller of `display-buffer' is ready to handle the case of not
295 displaying the buffer in a window.
297 ** Lisp evaluation changes
299 *** `eval-defun' on an already defined defcustom calls the :set function,
303 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
304 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
305 zero prefix argument. This disables truncation of lists in the output,
306 equivalent to setting `(eval-expression-)print-length' and
307 `(eval-expression-)print-level' to nil. Additionally, it causes integers
308 to be printed in other formats (octal, hexadecimal, and character).
311 *** New hook `eval-expression-minibuffer-setup-hook' run by
312 `eval-expression' on entering the minibuffer.
315 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
318 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
319 because it affects caching of paragraph scanning results as well.
320 There is no reason to set this to nil except for debugging purposes.
323 ** The option `set-mark-default-inactive' has been deleted.
324 This unfinished feature was introduced by accident in Emacs 23.1;
325 simply disabling Transient Mark mode does the same thing.
328 ** The default value of `comment-use-global-state' is now t,
329 and this variable has been marked obsolete.
332 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
333 and works for git too, if you fetch the repository notes.
336 ** New option `load-prefer-newer' affects how the `load' function chooses
337 the file to load. If this is non-nil, then when both .el and .elc
338 versions of a file exist, and the caller did not explicitly specify
339 which one to load, then the newer file is loaded. The default, nil,
340 means to always load the .elc file.
343 * Editing Changes in Emacs 24.4
345 ** Indentation changes
348 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
349 When invoked without a prefix argument, it now activates a transient
350 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
351 the text indentation in the region. Typing any other key resumes
352 normal editing behavior.
354 *** `electric-indent-mode' is enabled by default.
357 *** `tab-stop-list' is now implicitly extended to infinity by repeating
358 the last step. Its default value is changed to nil, which means a tab
359 stop every `tab-width' columns.
362 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
363 When called in succession, it cycles between spacing conventions:
364 one space, no spaces, original spacing.
367 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
368 a line after a one-letter word, which is an error in some typographical
369 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
372 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
374 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
375 Most commands are still unaware of it, but kill/yank do work on the rectangle.
378 ** New option `visual-order-cursor-movement'.
379 If this is non-nil, cursor motion with arrow keys will follow the
380 visual order of characters on the screen: <left> always moves to the
381 left, <right> always moves to the right, disregarding the surrounding
382 bidirectional context.
387 *** All interactive commands that read a register (`copy-to-register', etc.)
388 now display a temporary window after `register-preview-delay' seconds
389 that summarizes existing registers. To disable this, set that option to nil.
390 Interactive commands that read registers and want to make use of this
391 should use `register-read-with-preview' to read register names.
394 *** New command `frameset-to-register' bound to `C-x r f', replacing
395 `frame-configuration-to-register'. It offers similar functionality,
396 plus enhancements like the ability to restore deleted frames.
397 (`frame-configuration-to-register' still exists, but no longer has a
401 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
405 ** New command `delete-duplicate-lines'.
406 This searches the region for identical lines, and removes all but one
407 copy of each repeated line. The lines need not be sorted.
410 * Changes in Specialized Modes and Packages in Emacs 24.4
413 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
415 ~/.emacs.d/timelog replaces ~/.timelog
416 ~/.emacs.d/vip replaces ~/.vip
417 ~/.emacs.d/viper replaces ~/.viper
418 ~/.emacs.d/ido.last replaces ~/.ido.last
419 ~/.emacs.d/kkcrc replaces ~/.kkcrc
420 ~/.emacs.d/quickurls replaces ~/.quickurls
421 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
422 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
423 ~/.emacs.d/places replaces ~/.emacs-places
424 ~/.emacs.d/shadows replaces ~/.shadows
425 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
426 ~/.emacs.d/strokes replaces ~/.strokes
427 ~/.emacs.d/notes replaces ~/.notes
428 ~/.emacs.d/type-break replaces ~/.type-break
429 Also the following files used by the now obsolete otodo-mode.el:
430 ~/.emacs.d/todo-do replaces ~/.todo-do
431 ~/.emacs.d/todo-done replaces ~/.todo-done
432 ~/.emacs.d/todo-top replaces ~/.todo-top
434 ** Backtrace and debugger
437 *** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
438 display of local variables of the current stack frame.
441 *** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
442 the lexical environment when evaluating the code in the context at point
443 (and so allows you to access lexical variables).
446 *** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
449 ** Battery information can now be retrieved from BSD's `apm' utility.
452 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
454 ** Calendar and Diary
457 *** New faces `calendar-weekday-header', `calendar-weekend-header',
458 and `calendar-month-header'.
461 *** New option `calendar-day-header-array'.
464 *** New variable `diary-from-outlook-function', used by the command
465 `diary-from-outlook'.
468 *** The variable `calendar-font-lock-keywords' is obsolete.
473 *** Calc by default now uses the Gregorian calendar for all dates, and
474 uses January 1, 1 AD as its day number 1. Previously Calc used the
475 Julian calendar for dates before September 14, 1752, and it used
476 December 31, 1 BC as its day number 1; the new scheme is more
477 consistent with Calendar's calendrical system and day numbering.
480 *** The new option `calc-gregorian-switch' lets you configure if
481 (and when) Calc switches from the Julian to the Gregorian calendar.
484 *** Support for ISO 8601 dates.
490 **** The cpp-root project now supports executing a compile command.
491 It can be set through the new :compile-command slot or the
492 buffer-local variable `compile-command'.
494 **** Better selection of include directories for the 'linux' project.
495 Include directories now support out-of-tree build directories and
496 target architecture auto-detection.
500 **** Improved detection of used namespaces in current scope in C++.
502 **** Parsing of default values for variables and function arguments in C/C++.
503 They are also displayed by the summarize feature in the mode line.
505 **** Improved parsing of function pointers in C/C++.
506 This also includes parsing of function pointers as function arguments.
508 **** Parsing of C/C++ preprocessor macros that open new scope.
509 For example, this enables parsing of macros that open new namespaces.
511 **** Support for 'this' pointer in inline member functions in C++.
516 *** New macro `cl-tagbody'.
517 This executes statements while allowing for control transfer to labels.
520 *** letf is now just an alias for cl-letf.
525 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
526 Hence, you can now enable it independently from those modes, and from
527 `transient-mark-mode'.
530 *** `cua-highlight-region-shift-only' is now obsolete.
531 You can disable `transient-mark-mode' to get the same result.
534 *** CUA's rectangles can now be used without CUA by calling the command
535 `cua-rectangle-mark-mode'.
540 *** Support for completion, ElDoc, and Flycheck has been added.
543 *** The current CFEngine syntax is parsed from "cf-promises -s json".
544 There is a fallback syntax available if you don't have cf-promises or
545 if your version doesn't support that option. See option `cfengine-cf-promises'.
548 ** Delete Selection mode can now be used without Transient Mark mode.
553 *** `desktop-save-mode' by default now auto-saves an existing desktop file
554 after `desktop-auto-save-timeout'. To disable this, customize that option
558 *** `desktop-restore-frames', enabled by default, allows saving and
559 restoring the frame/window configuration (frameset). Additional options
560 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
561 and `desktop-restore-forces-onscreen' offer further customization.
564 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
565 such as file ownership or permissions, are visible.
568 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
569 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
570 The results display in the mode line.
572 ** Electric Pair mode
575 *** New option `electric-pair-preserve-balance', enabled by default.
576 If non-nil, pairing/skipping only kicks in when that help the balance
577 of parentheses and quotes, i.e. the buffer should end up at least as
580 You can further control this behavior by adjusting the predicates
581 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
584 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
585 In `electric-pair-mode', the commands `backward-delete-char' and
586 `backward-delete-char-untabify' are now bound to electric variants
587 that delete the closer when invoked between adjacent pairs.
590 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
591 In `electric-pair-mode', inserting a newline between adjacent pairs
592 opens an extra newline after point, which is indented if
593 `electric-indent-mode' is also set.
596 *** New option `electric-pair-skip-whitespace', enabled by default.
597 This controls if skipping over closing delimiters should jump over any
598 whitespace slack. Setting it to `chomp' makes it delete this
599 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
602 *** New variables control the pairing in strings and comments.
603 You can customize `electric-pair-text-pairs' and
604 `electric-pair-text-syntax-table' to tweak pairing behavior inside
605 strings and comments.
608 ** New EPA option `epa-mail-aliases'.
609 You can set this to a list of email address aliases that `epa-mail-encrypt'
610 should use to find keys.
613 ** New ERC option `erc-accidental-paste-threshold-seconds'.
614 If set to a number, this can be used to avoid accidentally pasting large
615 amounts of data into the ERC input.
618 ** New ERT macro `skip-unless' allows skipping ERT tests.
619 See the ERT manual for details.
624 *** `eshell' now supports visual subcommands and options.
625 Eshell has been able to handle "visual" commands (interactive,
626 non-line oriented commands such as top that require display
627 capabilities not provided by eshell) by running them in an Emacs
628 terminal emulator. See `eshell-visual-commands'.
630 This feature has been extended to subcommands and options that make a
631 usually line-oriented command a visual command. Typical examples are
632 "git log" and "git <command> --help", which display their output in a
633 pager by default. See `eshell-visual-subcommands' and
634 `eshell-visual-options'.
637 *** New Eshell-Tramp module.
638 External su and sudo commands are now the default; the internal,
639 Tramp-using variants can still be used by enabling the eshell-tramp
643 ** New F90 mode option `f90-smart-end-names'.
646 Icomplete is now more similar to Ido.
649 *** Icomplete by default now applies to all forms of minibuffer completion.
650 The variable `icomplete-with-completion-tables' (now a user option)
651 controls this. To restore the old behavior, set it back to
652 '(internal-complete-buffer).
655 *** You can navigate through and select completions using the keys
656 from `icomplete-minibuffer-map'.
659 *** The string that separates potential completions is now a customizable
660 option (`icomplete-separator'). The default is " | " rather than ",".
663 *** New face `icomplete-first-match'; and new options
664 `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
667 *** The option `icomplete-show-key-bindings' has been removed.
672 *** An Ido user manual is now included.
675 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
676 This means to use virtual buffers if the current ido input does not match
680 *** The variable `ido-decorations' can optionally have two new elements,
681 which are the brackets to use around the sole remaining completion.
686 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
687 visit the next image file and the previous image file in the same
688 directory, respectively.
691 *** New commands to show specific frames of multi-frame images.
692 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
693 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
696 *** New commands to speed up, slow down, or reverse animation.
697 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
698 speed up and slow down the animation. `a r' (`image-reverse-speed')
699 to reverse it and `a 0' (`image-reset-speed') to reset it.
702 *** The command `image-mode-fit-frame' deletes other windows.
703 When toggling, it restores the frame's previous window configuration.
704 It also has an optional frame argument, which can be used by Lisp
705 callers to fit the image to a frame other than the selected frame.
710 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
711 the symbol found near point.
714 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
715 will cycle through faces in `hi-lock-face-defaults' without prompting.
718 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
723 *** New Info face `info-index-match', used to highlight matches in index
724 entries displayed by `Info-index-next', `Info-virtual-index' and
728 *** The Info-edit command is obsolete. Editing Info nodes by hand
729 has not been relevant for some time.
734 *** New option `js-switch-indent-offset'.
737 *** Better indentation of multiple-variable declarations.
738 If a declaration spans several lines, variables on the following lines
739 are lined up to the first one.
742 *** Recognition and better indentation of continuations in array comprehensions.
745 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
750 *** Font locking for Texinfo comments and new keywords.
752 *** Completion in Octave file buffers.
756 *** Jump to definition.
758 *** Documentation lookup/search.
761 ** OPascal mode is the new name for Delphi mode
764 *** All delphi-* variables and functions have been renamed to opascal-*.
765 Obsolete aliases exist for those likely to have been used externally.
768 *** The option `delphi-newline-always-indents' has been removed.
769 Use `electric-indent-mode' instead.
772 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
777 *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
778 to filter the list of packages by a keyword.
781 *** In the `describe-package' buffer, there are now buttons listing the
782 keywords related to the package. Click on a button to see other packages
783 related to that keyword.
786 *** The format of `archive-contents' files, generated by package
787 repositories, has changed to allow a new (fifth) element in the data
788 vectors, containing an associative list with extra properties.
789 (For example, `describe-package' uses the `:url' extra property to
790 display a "Homepage" header.)
793 ** In Prolog mode, `prolog-use-smie' has been removed,
794 along with the non-SMIE indentation code.
799 *** The new command `remember-notes' creates a buffer that is saved on exit.
800 You can use it as a more permanent *scratch* buffer.
803 *** Remember can now store notes in separate files.
804 To use this, add `remember-store-in-files' to the `remember-handler-functions'
805 option. The files are saved in `remember-data-directory' using
806 names specified by `remember-directory-file-name-format'.
811 *** Customize `rmail-mbox-format' to influence some minor aspects of
812 how Rmail displays non-MIME messages.
815 *** The `unrmail' command now converts from BABYL to mboxrd format,
816 rather than mboxo. Customize `unrmail-mbox-format' to change this.
821 *** Improved syntax highlighting and indentation.
824 *** New `electric-indent-mode' integration.
827 *** New option `ruby-encoding-magic-comment-style'.
830 *** New option `ruby-custom-encoding-magic-comment-template'.
833 *** New option `ruby-align-to-stmt-keywords'.
836 *** New option `ruby-align-chained-calls'.
839 *** More Ruby file types have been added to `auto-mode-alist'.
841 ** Search and Replace
844 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
845 starts a symbol (identifier) incremental search forward with the
846 symbol found near point added to the search string initially.
849 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
850 and adds it to the search string.
853 *** `M-s i' in Isearch mode toggles whether search matches invisible text.
856 *** `query-replace' skips invisible text when `search-invisible' is nil,
857 and opens overlays with hidden text when `search-invisible' is `open'.
860 *** A negative prefix arg of replacement commands replaces backward.
861 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
862 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
865 *** By default, prefix arguments do not now terminate Isearch mode.
866 Set `isearch-allow-prefix' to nil to restore old behavior.
869 *** More Isearch commands accept prefix arguments, namely
870 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
874 *** Word search now matches whitespace at the beginning/end
875 of the search string if it contains leading/trailing whitespace.
876 In an incremental word search or when using a non-nil LAX argument
877 of `word-search-regexp', the lax matching can also match part of
878 the first word (in addition to the lax matching of the last word).
879 The same rules are now applied to the symbol search with the difference
880 that it matches symbols, and non-symbol characters between symbols.
883 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
886 ** The shell.el option `explicit-bash-args' includes --noediting by default.
887 All non-ancient Bash versions support this option.
892 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
895 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
897 ** SMIE indentation can be customized via `smie-config'.
898 Emacs can learn the appropriate indentation settings if you provide it
899 with an indented sample file.
904 *** Improved login monitoring and appropriate response to login failures.
905 New variable `sql-login-delay' defines maximum wait time for a connection.
908 SQL*Plus script placeholders are properly highlighted and identified
909 in `sql-placeholders-filter'. When starting SQL*Plus, `sql-oracle-options'
910 are passed before the logon parameter, as required. The default now
911 includes `-L', to limit the number of logon attempts per invocation.
914 ** New Term mode option `term-suppress-hard-newline'.
917 ** Todo mode has been rewritten and enhanced.
918 The Todo mode user manual describes all commands and most user
919 options. To support some of these features, a new file format is
920 used, which is incompatible with the old format; however, you can
921 convert old todo and done item files to the new format on initializing
922 the first new todo file, or at any later time with the provided
923 conversion command. The previous version of todo-mode.el has been
924 renamed to otodo-mode.el and is now obsolete. New features include:
926 *** Support for multiple todo files and archive files of done items.
928 *** Renaming, reordering, moving, merging, and deleting categories.
930 *** Sortable tabular summaries of categories and the item types they contain.
932 *** Cross-category lists of items filtered by specific criteria.
934 *** More fine-grained interaction with the Emacs diary, by being able to
935 decide for each todo item whether it appears in the Fancy Diary display.
937 *** Highly flexible new item insertion and item editing.
939 *** Moving items between categories, storing done items in their category
940 or in archive files, undoing or unarchiving done items.
942 *** Reprioritizing items by inputting a numerical priority.
944 *** Extensive customizability of operation and display, including many faces.
949 *** `trace-function' and `trace-function-background' no longer prompt for
950 the output buffer. Unless you use a prefix argument, they output to
954 *** With a prefix argument, `trace-function' and `trace-function-background'
955 will prompt for a "context". This is a Lisp expression, whose value at the
956 time the function is entered/exited is printed along with the function's
962 *** The experimental url syntax for remote file names has been removed.
965 *** New connection method "adb", which allows to access Android
966 devices by the Android Debug Bridge. The variable `tramp-adb-program'
967 can be used to adapt the path of the "adb" program, if needed.
970 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
971 "scpc" and "rsyncc" are discontinued. The ssh option
972 "ControlMaster=auto" is set automatically in all ssh-based methods,
973 when possible. See `tramp-use-ssh-controlmaster-options'.
976 *** Handlers for `file-acl' and `set-file-acl' for remote machines
977 which support POSIX ACLs.
980 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
981 for remote machines which support filesystem notifications.
984 ** New URL command `url-cookie-list' displays the current cookies,
985 and allows you to interactively remove cookies.
987 ** VC and related modes
990 *** In VC directory mode, `D' displays diffs between VC-controlled
991 whole tree revisions.
994 *** In VC directory mode, `L' lists the change log for the current VC
995 controlled tree in a window.
998 *** In VC directory mode, `I' shows a log of changes that will be
999 received with a pull operation.
1002 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
1003 under current version control system. When called with a prefix
1004 argument, you can remove a file from the ignored file list.
1009 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
1012 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
1015 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
1016 are obsolete. Customize the `woman-*' faces instead.
1018 ** Obsolete packages
1021 *** iswitchb.el; use icomplete-mode.
1024 *** longlines.el; use visual-line-mode.
1033 *** terminal.el; use term.el instead.
1036 *** the old version of todo-mode.el (renamed to otodo-mode.el).
1039 *** xesam.el (owing to the cancellation of the XESAM project).
1042 *** yow.el; use fortune.el or cookie1.el instead.
1045 * New Modes and Packages in Emacs 24.4
1048 ** New package `eww' is a built-in web browser.
1049 It is only available if Emacs is compiled with libxml2 support.
1052 ** New minor mode `superword-mode'.
1053 This overrides the default word motion commands to treat "symbol_words"
1054 as a single word, similar to what `subword-mode' does.
1057 ** New package nadvice.el offers lighter-weight advice facilities.
1060 *** add-function/remove-function, which can be used to add/remove code on any
1061 function-carrying place, such as process-filters or `<foo>-function' hooks.
1063 *** advice-add/advice-remove to add/remove a piece of advice on a named
1064 function, much like `defadvice' does.
1066 ** New package frameset.el.
1067 It provides a set of operations to save a frameset (the state of all
1068 or a subset of the existing frames and windows, somewhat similar to a
1069 frame configuration), both in-session and persistently, and restore it
1070 at some point in the future.
1073 ** New package filenotify.el provides an interface for file system
1074 notifications. It requires that Emacs be compiled with one of the
1075 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
1078 * Incompatible Lisp Changes in Emacs 24.4
1081 ** `kill-region' has lost its `yank-handler' optional argument.
1084 ** `(input-pending-p)' no longer runs other timers that are ready to run.
1085 The new optional CHECK-TIMERS parameter allows for the prior behavior.
1088 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
1091 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
1092 Some languages match those as »...«, and others as «...», so it is
1093 better for Emacs to stay neutral by default.
1096 ** In compiled Lisp files, the header no longer includes a timestamp.
1099 ** The default file coding for Emacs Lisp files is now utf-8.
1100 (See `file-coding-system-alist'.) In most cases, this change is
1101 transparent, but files that contain unusual characters without
1102 specifying an explicit coding system may fail to load with obscure
1103 errors. You should either convert them to utf-8 or add an explicit
1107 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
1108 It used to disable the minor mode, major mode, and text-property keymaps,
1109 whereas now it simply has higher precedence.
1112 ** Default process filters and sentinels are not nil any more.
1113 Instead they default to a function that does what the nil value used to do.
1116 ** `read-event' does not return decoded chars in ttys any more.
1117 As was the case in Emacs 22 and before, the decoding of terminal
1118 input, according to `keyboard-coding-system', is not performed in
1119 `read-event' any more. But unlike in Emacs 22, this decoding is still
1120 done before input-decode-map, function-key-map, etc.
1123 ** The option `inhibit-local-menu-bar-menus' has been removed.
1126 ** Frame-local variables that affect redisplay do not work any more.
1127 More specifically, redisplay does not bother to check for a frame-local
1128 value when looking up variables.
1131 ** nil and "unbound" are indistinguishable in `symbol-function'.
1132 `symbol-function' does not signal a `void-function' error any more.
1133 To determine if a symbol's function definition is void, use `fboundp'.
1136 ** `defadvice' does not honor the `freeze' flag and cannot advise
1137 special-forms any more.
1140 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1141 when lexical binding is enabled. Previously, VAR was bound to nil,
1142 which often led to spurious unused-variable warnings.
1145 ** The return value of `backup-buffer' has changed.
1146 The second argument is no longer an SELinux context, instead it is an
1147 alist of extended attributes as returned by the new function
1148 `file-extended-attributes'. The attributes can be applied to another
1149 file using `set-file-extended-attributes'.
1152 ** By default `copy-file' no longer copies file permission bits to an
1153 existing destination; and it sets the file permission bits of a newly
1154 created destination to those of the source, masked by the default file
1155 permissions. To copy the file permission bits, pass t as the
1156 PRESERVE-PERMISSIONS argument of `copy-file'.
1159 ** `visited-file-modtime' now returns -1 for nonexistent files.
1160 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1161 in the presence of files with negative time stamps.
1164 ** The cars of the elements in `interpreter-mode-alist' are now
1165 treated as regexps rather than literal strings.
1168 * Lisp Changes in Emacs 24.4
1171 ** The second argument of `eval' can now specify a lexical environment.
1174 ** New functions `special-form-p' and `macrop'.
1177 ** New macro `define-alternatives' can be used to define generic commands.
1178 Generic commands are interactive functions whose implementation can be
1179 selected among several alternatives, as a matter of user preference.
1182 ** If you give a symbol a `defalias-fset-function' property, `defalias'
1183 on that symbol will use the associated value as a function to call
1187 ** New variable `enable-dir-local-variables'.
1188 Directory-local variables are ignored if this is nil. This may be
1189 useful for modes that want to ignore directory-locals while still
1190 respecting file-local variables.
1193 ** New function `get-pos-property'.
1196 ** `read-regexp' now uses the new variable `read-regexp-defaults-function'
1197 as a function to call to provide default values.
1199 ** Completion changes
1202 *** The separator used by `completing-read-multiple' is now a regexp.
1203 The default `crm-separator' has been changed to allow surrounding spaces
1207 *** The `common-substring' argument of `display-completion-list',
1208 which has been documented as obsolete since Emacs 23.1, is now _really_
1209 obsolete, and no longer advertised. Instead either call
1210 `completion-hilit-commonality' to add the highlighting; or use
1211 `completion-all-completions', which returns highlighted strings.
1214 *** New function `completion-table-with-cache' is a wrapper for
1215 `completion-table-dynamic' that caches the result of the last lookup.
1218 *** New function `completion-table-merge' to combine several
1219 completion tables by merging their completions.
1222 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1223 display specified symbols as composed characters. E.g., in Emacs Lisp mode,
1224 this replaces the string "lambda" with the Greek lambda character.
1229 *** Functions to pop up menus and dialogs now work on all terminals,
1230 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1231 `message-box', `yes-or-no-p', etc.
1233 The function `display-popup-menus-p' will now return non-nil for a
1234 display or frame whenever a mouse is supported on that display or
1238 *** New hook `tty-setup-hook', run at the end of initializing a text terminal.
1241 *** The hook `term-setup-hook' is obsolete. It is entirely equivalent
1242 to `emacs-startup-hook'. See also the new `tty-setup-hook'.
1245 ** New hook `pre-redisplay-function'.
1248 ** New bool-vector set operation functions
1249 *** `bool-vector-exclusive-or'
1250 *** `bool-vector-union'
1251 *** `bool-vector-intersection'
1252 *** `bool-vector-set-difference'
1253 *** `bool-vector-not'
1254 *** `bool-vector-subsetp'
1255 *** `bool-vector-count-consecutive'
1256 *** `bool-vector-count-population'
1259 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1261 ** Error-handling changes
1264 *** New function `define-error'.
1267 *** `with-demoted-errors' takes an additional argument `format'.
1270 ** New macro `with-eval-after-load'.
1271 This is like the old `eval-after-load', but better behaved.
1274 ** New library subr-x.el with miscellaneous small utility functions
1275 *** `hash-table-keys'
1276 *** `hash-table-values'
1277 *** `string-blank-p'
1278 *** `string-empty-p'
1280 *** `string-reverse'
1281 *** `string-trim-left'
1282 *** `string-trim-right'
1284 *** `string-remove-prefix'
1285 *** `string-remove-suffix'
1288 ** Obsoleted functions
1291 *** `lisp-complete-symbol'
1292 *** `field-complete'
1293 *** `minibuffer-completion-contents'
1294 *** `isearch-nonincremental-exit-minibuffer'
1295 *** `isearch-filter-visible'
1296 *** `generic-make-keywords-list'
1297 *** `get-upcase-table' (use `case-table-get-table' instead).
1300 ** `with-wrapper-hook' is obsoleted by `add-function'.
1301 The few hooks that used with-wrapper-hook are replaced as follows:
1302 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1303 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1304 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1307 ** `byte-compile-interactive-only-functions' is now obsolete.
1308 To specify that a command should only be called interactively, give it
1309 a non-nil `interactive-only' property.
1312 ** `split-string' now takes an optional argument TRIM.
1313 The value, if non-nil, is a regexp that specifies what to trim from
1314 the start and end of each substring.
1317 ** New function `string-suffix-p'.
1319 ** File-handling changes
1322 *** Support for filesystem notifications.
1323 Emacs now supports notifications of filesystem changes, such as
1324 creation, modification, and deletion of files. This requires the
1325 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1326 MS-Windows systems, this is supported for Windows XP and newer
1330 *** The 9th element returned by `file-attributes' is now unspecified.
1331 Formerly, it was t if the file's gid would change if file were deleted
1332 and recreated. This value has been inaccurate for years on many
1333 platforms, and nobody seems to have noticed or cared.
1336 *** The 6th argument to `copy-file' has been renamed to
1337 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1338 Unix file permission bits as well as SELinux context.
1341 *** The function `file-ownership-preserved-p' now has an optional
1342 argument GROUP which causes it check for file group too. This can be
1343 used in place of the 9th element of `file-attributes'.
1346 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1347 argument, with the same interpretation as the returned value of
1348 `visited-file-modtime'.
1350 ** Autorevert changes
1353 *** If Emacs is compiled with file notification support, notifications
1354 are used instead of checking the time stamp of the files. You can
1355 disable this by setting the user option `auto-revert-use-notify' to
1356 nil. Alternatively, a regular expression of directories to be
1357 excluded from file notifications can be specified by
1358 `auto-revert-notify-exclude-dir-regexp'.
1361 *** The new user option `auto-revert-remote-files' enables reversion
1362 of remote files when set to non-nil.
1367 *** The function `face-spec-set' is now like `setq' for face specs.
1368 Its third arg now accepts values specifying a face spec type (defface,
1369 custom, or override spec), and the relevant spec is set accordingly.
1372 *** New function `add-face-text-property', which can be used to
1373 conveniently prepend/append new face properties.
1375 *** Face specs set via Custom themes now replace the `defface' spec
1376 rather than inheriting from it (as do face specs set via Customize).
1379 *** New face characteristic (supports :underline (:style wave))
1380 specifies whether or not the terminal can display a wavy line.
1383 *** New face spec attribute :distant-foreground
1384 specifies foreground to use if background color is near the foreground
1385 color that would otherwise have been used.
1390 *** `image-animated-p' is now `image-multi-frame-p'.
1391 It returns non-nil for any image that contains multiple frames,
1392 whether or not it specifies a frame delay.
1395 *** New variable `image-default-frame-delay' gives the frame delay for
1396 animated images which do not specify a frame delay.
1399 *** New functions `image-current-frame' and `image-show-frame' for getting
1400 and setting the current frame of a multi-frame image.
1405 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1406 **** object-name -> eieio-object-name
1407 **** object-class -> eieio-object-class
1408 **** object-class-fast -> eieio--object-class
1409 **** object-class-name -> eieio-object-class-name
1410 **** object-name-string -> eieio-object-name-string
1411 **** object-num-slots -> eieio--object-num-slots
1412 **** object-set-name-string -> eieio-object-set-name-string
1413 **** class-of -> eieio-object-class
1414 **** class-name -> eieio-class-name
1415 **** class-parent -> eieio-class-parent
1416 **** class-parents -> eieio-class-parents
1417 **** class-parents-fast -> eieio-class-parents-fast
1418 **** class-children -> eieio-class-children
1419 **** class-num-slots -> eieio--class-num-slots
1420 **** class-precedence-list -> eieio-class-precedence-list
1421 **** class-direct-subclasses -> eieio-class-children
1422 **** class-direct-superclasses -> eieio-class-parents
1424 ** Changes in encoding and decoding of text
1427 *** New coding-system `prefer-utf-8'.
1428 This is like `undecided' but prefers UTF-8 on decoding if the text to
1429 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1430 any non-ASCII characters are automatically encoded as UTF-8.
1433 *** New attributes of coding-systems whose type is `undecided'.
1434 Two new attributes, `:inhibit-null-byte-detection' and
1435 `:inhibit-iso-escape-detection', determine how to detect encoding of
1436 text that includes null bytes and ISO-2022 escape sequences,
1437 respectively. Each of these attributes can be either nil, zero, or
1438 t. If it is t, decoding text ignores null bytes and, respectively,
1439 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1440 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1441 text is encoded in one of the ISO-2022 encodings, such as
1442 iso-2022-7bit. If the value is zero, Emacs consults the variables
1443 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1445 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1446 UTF-8 encoding and decoding, whenever possible.
1448 These attributes are only meaningful for coding-systems of type
1449 `undecided'. (The type of a coding-system is determined by its
1450 `:coding-type' attribute and can be accessed by calling the
1451 `coding-system-type' function.)
1454 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1457 ** New functions `group-gid' and `group-real-gid'.
1460 ** The spelling of the rx.el category `chinese-two-byte' has been
1461 corrected (the first 'e' was missing).
1464 ** Minor internal changes to the details of lock files.
1465 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1466 If DIR/.#FILE already exists and is not an Emacs lock file,
1467 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1468 numbered lock files DIR/.#FILE.0...).
1469 On file systems that do not support symbolic links, the lock is now a
1470 regular file with contents being what would have been in the symlink.
1472 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1475 *** The package descriptor and name of global variables, constants,
1476 and functions should be separated by two hyphens if the symbol is not
1477 meant to be used by other packages.
1480 * Changes in Emacs 24.4 on Non-Free Operating Systems
1483 ** The procedure for building Emacs on MS-Windows has changed.
1484 It is now built by running the same configure script as on all other
1485 platforms. This requires the MSYS environment and MinGW development
1486 tools. See the updated instructions in nt/INSTALL for details.
1488 Using the Posix configure script and Makefile's also means a change in
1489 the directory structure of the Emacs installation on Windows. It is
1490 now the same as on GNU and Unix systems. In particular, the auxiliary
1491 programs, such as cmdproxy.exe and hexl.exe, are in
1492 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1493 version), version-independent site-lisp is in share/emacs/site-lisp,
1494 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1495 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1496 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1497 directories and will find the files in there automatically; there's no
1498 need to set any variables due to this change.)
1501 ** Emacs on Windows 2000 and later can now access files and directories
1502 whose names cannot be encoded in the current system codepage.
1504 The new variable `w32-unicode-filenames' controls this feature: if it
1505 is t, Emacs uses Unicode APIs to pass file names to system calls,
1506 which lifts the limitation of file names to the current locale.
1509 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1510 The backtrace is written to the 'emacs_backtrace.txt' file in the
1511 directory where Emacs was running.
1514 ** The variable `buffer-file-type' is no longer supported.
1515 Setting it has no effect, and %t in the mode-line format is ignored.
1516 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1517 modifying it has no effect.
1520 ** Lock files now work on MS-Windows.
1521 This helps to prevent losing your edits if the same file is being
1522 edited in another Emacs session or by another user. See the node
1523 "Interlocking" in the Emacs User Manual for the details. To disable
1524 file locking, customize `create-lockfiles' to nil.
1526 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1527 GNUstep and Mac OS X 10.4 use the old font backend.
1528 To use the old backend by default, do on the command line:
1529 % defaults write org.gnu.Emacs FontBackend ns
1531 ** Improved fullscreen support on Mac OS X.
1532 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1533 Customize `ns-use-native-fullscreen' to change the style.
1534 For Mac OS X 10.7 and newer, native is the default.
1536 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1537 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1538 does not apply to images.
1541 * Installation Changes in Emacs 24.3
1543 ** The default X toolkit is now Gtk+ version 3.
1544 If you don't pass `--with-x-toolkit' to configure, or if you use
1545 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1546 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1547 You can explicitly require a specific version by passing
1548 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1550 ** New configure option `--enable-link-time-optimization', to utilize
1551 an appropriate feature provided by GCC since version 4.5.0.
1553 ** New configure option `--without-all' to disable most of the optional
1554 features (image support, etc.) that are normally enabled by default.
1556 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1557 Emacs). If building with GCC, this enables compile-time checks that
1558 warn/give errors about possibly-questionable C code. On a recent GNU
1559 system there should be no warnings; on older and on non-GNU systems
1560 the results may be useful to developers.
1562 ** The configure option `--enable-use-lisp-union-type' has been
1563 renamed to `--enable-check-lisp-object-type', as the resulting
1564 Lisp_Object type no longer uses a union to implement the compile time
1565 check that this option enables.
1567 ** The configure option `--disable-maintainer-mode' has been removed,
1568 as it was confusingly-named and rarely useful.
1570 ** The configure options `--program-prefix', `--program-suffix', and
1571 `--program-transform-name' apply to more than just the installed
1572 binaries. Now they also affect the man pages, icons, and the
1573 etc/emacs.desktop file; but not the info pages, since this would break
1574 links between the various manuals.
1576 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1577 overwriting "emacs" in the installation bin/ directory with a link
1580 ** Emacs uses libtinfo in preference to libncurses, if available.
1582 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1583 /usr/pkg/lib to the linker search path. You must add them yourself if
1586 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1587 (from the bin and libexec directories, respectively). The former is
1588 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1591 * Startup Changes in Emacs 24.3
1593 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1594 lisp/ directory. There should not be any there anyway. If you have
1595 been adding them there, put them somewhere else; e.g., site-lisp.
1597 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1600 * Changes in Emacs 24.3
1604 *** `C-h f' (`describe-function') can now perform autoloading.
1605 When this command is called for an autoloaded function whose docstring
1606 contains a key substitution construct, that function's library is
1607 automatically loaded, so that the documentation can be shown
1608 correctly. To disable this, set `help-enable-auto-load' to nil.
1610 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1611 even after their associated libraries have been loaded (and the
1612 autoloads have been redefined as functions).
1616 *** Images displayed via ImageMagick now support transparency and the
1617 :background image specification property.
1619 *** When available, ImageMagick support is automatically enabled.
1620 It is no longer necessary to call `imagemagick-register-types'
1621 explicitly to install ImageMagick image types; that function is called
1622 automatically at startup, or when customizing an imagemagick- option.
1624 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1625 ImageMagick to view images. (You must call `imagemagick-register-types'
1626 afterwards if you do not use customize to change this.)
1628 *** The new variable `imagemagick-enabled-types' also affects which
1629 ImageMagick types are treated as images. The function
1630 `imagemagick-filter-types' returns the list of types that will be
1635 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1636 next and previous path separator, respectively.
1638 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1639 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1640 non-nil before enabling the mode.
1644 *** New option `mode-line-default-help-echo' specifies the help text
1645 (shown in a tooltip or in the echo area) for any part of the mode line
1646 that does not have its own specialized help text.
1648 *** You can now click mouse-3 in the coding system indicator to invoke
1649 `set-buffer-file-coding-system'.
1651 ** Server and client
1653 *** emacsclient now obeys string values for `initial-buffer-choice',
1654 if it is told to open a new frame without specifying any file to visit
1655 or expression to evaluate.
1657 *** New option `server-auth-key' specifies a shared server key.
1659 ** Emacs now generates backtraces on fatal errors.
1660 On encountering a fatal error, Emacs now outputs a textual description
1661 of the fatal signal, and a short backtrace on platforms like glibc
1662 that support backtraces.
1664 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1665 This minor mode replaces `toggle-read-only', which is now obsolete.
1667 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1668 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1669 respectively, without exiting from the prompt.
1671 ** In the Package Menu, newly-available packages are listed as "new",
1672 and sorted above the other "available" packages by default.
1674 ** If your Emacs was built from a repository checkout, the new variable
1675 `emacs-bzr-version' contains information about the bzr revision used.
1677 ** New option `create-lockfiles' specifies usage of lockfiles.
1678 It defaults to t. Changing it to nil inhibits the creation of lock
1679 files (use this with caution).
1681 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1682 variables on remote hosts.
1684 ** The entry for PCL-CVS has been removed from the Tools menu.
1685 The PCL-CVS commands are still available via the keyboard.
1687 ** Using "unibyte: t" in Lisp source files is obsolete.
1688 Use "coding: raw-text" instead.
1690 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1691 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1692 The previous binding, introduced in Emacs 24.1, was a mistake, because
1693 `C-c LETTER' bindings are reserved for user customizations.
1695 ** Internationalization
1697 *** New language environment: Persian.
1699 *** New input method `vietnamese-vni'.
1701 ** Nextstep (GNUstep / Mac OS X) port
1703 *** Support for fullscreen and the frame parameter fullscreen.
1705 *** A file dialog is used for open/save operations initiated from the
1709 * Editing Changes in Emacs 24.3
1711 ** Search and Replace
1713 *** Non-regexp Isearch now performs "lax" space matching.
1714 Each sequence of spaces in the supplied search string may match any
1715 sequence of one or more whitespace characters, as specified by the
1716 variable `search-whitespace-regexp'. (This variable is also used by a
1717 similar existing feature for regexp Isearch.)
1719 *** New Isearch command `M-s SPC' toggles lax space matching.
1720 This applies to both ordinary and regexp Isearch.
1722 *** New option `replace-lax-whitespace'.
1723 If non-nil, `query-replace' uses flexible whitespace matching too.
1726 *** Global `M-s _' starts a symbol (identifier) incremental search,
1727 and `M-s _' in Isearch toggles symbol search mode.
1728 `M-s c' in Isearch toggles search case-sensitivity.
1730 ** Navigation commands
1732 *** New binding `M-g c' for `goto-char'.
1734 *** New binding `M-g TAB' for `move-to-column'.
1736 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1737 interactively with no prefix arg. Previously, it moved to column 1.
1739 ** New option `yank-handled-properties' allows processing of text
1740 properties on yanked text, in ways that are more general than just
1741 removing them (as is done by `yank-excluded-properties').
1743 ** New option `delete-trailing-lines' specifies whether
1744 M-x delete-trailing-whitespace should delete trailing lines at the end
1745 of the buffer. It defaults to t.
1747 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1749 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1750 `ucs-insert' is now an obsolete alias for `insert-char'.
1752 ** The `z' key no longer has a binding in most special modes.
1753 It used to be bound to `kill-this-buffer', but `z' is too easy to
1756 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1757 It copies the region-rectangle as the last rectangle kill.
1761 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1763 *** New option `register-separator' specifies the register containing
1764 the text to put between collected texts for use with
1765 M-x append-to-register and M-x prepend-to-register.
1768 * Changes in Specialized Modes and Packages in Emacs 24.3
1770 ** Common Lisp emulation (CL)
1772 *** CL's main entry is now (require 'cl-lib).
1773 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1774 i.e., all its definitions have the "cl-" prefix (and internal definitions
1775 use the "cl--" prefix).
1777 If `cl' provided a feature under the name `foo', then `cl-lib'
1778 provides it under the name `cl-foo' instead; with the exceptions of the
1779 few `cl' definitions that had to use `foo*' to avoid conflicts with
1780 pre-existing Elisp entities. These have been renamed to `cl-foo'
1781 rather than `cl-foo*'.
1783 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1784 provide the old, non-prefixed names. Some exceptions are listed below:
1786 *** `cl-flet' is not like `flet' (which is deprecated).
1787 Instead it obeys the behavior of Common-Lisp's `flet'.
1788 In particular, in cl-flet function definitions are lexically scoped,
1789 whereas in flet the scoping is dynamic.
1791 *** `cl-labels' is slightly different from `labels'.
1792 The difference is that it relies on the `lexical-binding' machinery
1793 (as opposed to the `lexical-let' machinery used previously) to capture
1794 definitions in closures, so such closures will only work if `lexical-binding'
1797 *** `cl-letf' is not exactly like `letf'.
1798 The only difference is in details that relate to some deprecated usage
1799 of `symbol-function' in place forms.
1801 *** `progv' was rewritten to use the `let' machinery.
1802 A side effect is that variables without corresponding values are bound
1803 to nil rather than being made unbound.
1805 *** The following methods of extending `setf' are obsolete
1806 (use features from gv.el instead):
1807 `define-modify-macro' (use `gv-letplace')
1808 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1809 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1810 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1814 *** Changes are now highlighted using the same color scheme as in
1815 modern VCSes. Deletions are displayed in red (new faces
1816 `diff-refine-removed' and `smerge-refined-removed', and new definition
1817 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1818 and `smerge-refined-added', and new definition of `diff-added').
1820 *** The variable `diff-use-changed-face' defines whether to use the
1821 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1822 changes in context diffs.
1824 *** The new command `diff-delete-trailing-whitespace' removes trailing
1825 whitespace introduced by a diff.
1827 ** Ediff now uses the same color scheme as Diff mode.
1831 A new version of python.el, which provides several new features, including:
1832 per-buffer shells, better indentation, Python 3 support, and improved
1833 shell-interaction compatible with iPython (and virtually any other
1836 *** Some user options have been replaced/renamed, including (old -> new):
1837 **** python-indent -> python-indent-offset
1838 **** python-guess-indent -> python-indent-guess-indent-offset
1839 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1840 **** python-use-skeletons -> python-skeleton-autoinsert
1842 *** Some user options have been removed, including:
1844 **** `python-indent-string-contents': Strings are never indented.
1846 **** `python-honour-comment-indentation':
1847 Comments are always considered as indentation markers.
1849 **** `python-continuation-offset': Indentation is automatically
1850 calculated in a pep8 compliant way depending on the context.
1852 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1853 Have no direct mapping as the shell interaction is completely different.
1855 **** `python-python-command', `python-jython-command':
1856 Replaced by `python-shell-interpreter'.
1858 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1859 `python-pdbtrack-minor-mode-string', `python-source-modes':
1862 *** Some commands have been replaced (old -> new):
1863 **** python-insert-class -> python-skeleton-class
1864 **** python-insert-def -> python-skeleton-def
1865 **** python-insert-for -> python-skeleton-for
1866 **** python-insert-if -> python-skeleton-if
1867 **** python-insert-try/except -> python-skeleton-try
1868 **** python-insert-try/finally -> python-skeleton-try
1869 **** python-insert-while -> python-skeleton-while
1870 **** python-find-function -> python-nav-jump-to-defun
1871 **** python-next-statement -> python-nav-forward-sentence
1872 **** python-previous-statement -> python-nav-backward-sentence
1873 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1874 **** python-end-of-defun-function -> python-nav-end-of-defun
1875 **** python-send-buffer -> python-shell-send-buffer
1876 **** python-send-defun -> python-shell-send-defun
1877 **** python-send-region -> python-shell-send-region
1878 **** python-send-region-and-go -> emulate with python-shell-send-region
1879 and python-shell-switch-to-shell
1880 **** python-send-string -> python-shell-send-string
1881 **** python-switch-to-python -> python-shell-switch-to-shell
1882 **** python-describe-symbol -> python-eldoc-at-point
1886 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1888 *** The D-Bus object manager interface is implemented.
1890 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1891 if their value does not fit into Emacs's integer range.
1893 *** The function `dbus-call-method' is now non-blocking.
1894 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1896 *** Signals can also be sent as unicast messages.
1898 *** The argument list of `dbus-register-signal' has been extended,
1899 according to the new match rule types of D-Bus.
1901 *** `dbus-init-bus' supports private connections.
1903 *** There is a new function `dbus-setenv'.
1905 ** `desktop-path' no longer includes the "." directory.
1906 Desktop files are now located in ~/.emacs.d by default.
1910 *** `dired-do-async-shell-command' executes each file sequentially
1911 if the command ends in `;' (when operating on multiple files).
1912 Otherwise, it executes the command on each file in parallel.
1914 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1915 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1918 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1919 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1920 mark/unmark/flag all files in the active region.
1922 *** The minibuffer default for `=' (`dired-diff') has changed.
1923 It is now the backup file for the file at point, if one exists.
1924 In Transient Mark mode the default is the file at the active mark.
1926 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1927 The global binding for `M-=', `count-words-region' is in effect.
1931 *** New module "notifications", which can send a notification when you
1932 receive a private message or your nickname is mentioned.
1934 *** ERC will look up server/channel names via auth-source and use any
1937 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1938 only applies to messages sent by lurkers.
1940 ** reStructuredText mode
1942 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1943 fontification, comment handling, and customization have all been revised
1946 *** Support for `imenu' and `which-function-mode'.
1948 *** The reStructuredText syntax is more closely covered.
1949 Sphinx support has been improved.
1951 *** `rst-insert-list' inserts new list or continues existing lists.
1953 *** A negative prefix argument always works for `rst-adjust'.
1955 *** The window configuration is reset after displaying a TOC.
1957 *** The constant `rst-version' describes the rst.el package version.
1961 *** Support for percent literals and recognition of regular expressions
1962 in method calls without parentheses with more methods, including Cucumber
1965 *** Improved syntax highlighting and indentation.
1967 *** New command `ruby-toggle-block', bound to `C-c {'.
1969 *** Some non-standard keybindings/commands have been removed:
1971 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1973 **** `ruby-mark-defun'; use `mark-defun'.
1975 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1976 appropriate settings for the variables `beginning-of-defun-function'
1977 and `end-of-defun-function'.
1979 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1980 `reindent-then-newline-and-indent' and `newline' have been removed.
1982 ** Shell Script mode
1984 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1986 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1988 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1992 *** The free software compiler GHDL is supported (and now the default).
1994 *** Support for the VHDL-AMS packages has been added/updated.
1996 *** Updated to the 2002 revision of the VHDL standard.
1998 *** Accepts \r and \f as whitespace.
2002 *** The faces used by Apropos are now directly customizable.
2003 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
2004 see the `apropos' Custom group for details.
2006 *** The old options whose values specified faces to use have been removed
2007 (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
2008 `apropos-match-face' and `apropos-property-face'.).
2012 *** This package has been rewritten to use Tabulated List mode.
2014 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
2015 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
2019 *** Algebraic simplification mode is now the default.
2020 To restrict to the limited simplifications given by the former
2021 default simplification mode, use `m I'.
2025 *** You can customize the header text that appears above each calendar month.
2026 See the variable `calendar-month-header'.
2028 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
2030 *** The calendars produced by cal-html include holidays.
2031 Customize `cal-html-holidays' to change this.
2035 *** The major modes from the parser generators "Bovine" and "Wisent"
2036 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
2037 are in `auto-mode-alist', and the corresponding manuals are included.
2041 **** Menu support for the "Configuration" feature. This allows users to
2042 choose the active configuration (such as debug or install) from the menu.
2044 **** New command `ede-set' to interactively set project-local variables.
2046 **** Support for compiling, debugging, and running in "generic" projects.
2048 **** Autoconf editing support for M4 macros with complex arguments.
2050 **** Compilation support for the "linux" project type.
2052 **** "simple" projects have been removed; use "generic" projects instead.
2056 **** Support for parsing #include statements inside a namespace in C/C++.
2058 **** Improved support for 'extern "C"' declarations in C/C++.
2060 **** The ability to ignore more common special C/C++ preprocessor symbols,
2061 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
2062 If available, include cdefs.h as an additional source of preprocessor symbols.
2064 **** Improved C/C++ function pointer parsing.
2066 **** In Python, support for converting imports to include file names.
2068 **** Ability to dynamically determine the Python load path.
2070 **** Support for the Python 'WITH' and 'AT' keywords.
2072 **** Improved tooltip completion.
2076 **** The SRecode manual is now included.
2078 **** Tag generation supports constructor/destructor settings and system
2079 include differentiation.
2081 **** Addition of 'Framework' support: Frameworks are specified when a
2082 particular kind of library (such as Android) is needed in a common language
2085 **** Support for nested templates and let variables override based on priority.
2087 **** Support for merging tables from multiple related modes, such as
2088 default -> c++ -> arduino.
2090 ** Compile has a new option `compilation-always-kill'.
2094 *** `custom-reset-button-menu' now defaults to t.
2096 *** Non-option variables are never matched in `customize-apropos' and
2097 `customize-apropos-options' (i.e., the prefix argument does nothing for
2098 these commands now).
2102 *** The variables `term-default-fg-color' and `term-default-bg-color'
2103 are now deprecated in favor of the customizable face `term'.
2105 *** You can customize how to display ANSI terminal colors and styles
2106 by customizing the corresponding `term-color-<COLOR>',
2107 `term-color-underline' and `term-color-bold' faces.
2111 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
2113 *** Remote processes are now also supported on remote MS-Windows hosts.
2117 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
2118 Previously, this slot stored semicolon-separated attribute-value pairs
2119 appended to some imap URLs, but this is not compatible with RFC 3986.
2120 So now the `filename' slot stores the entire path and query components,
2121 and the `attributes' slot is always nil.
2123 *** New function `url-encode-url' for encoding a URI string.
2124 The `url-retrieve' function now uses this to encode its URL argument,
2125 in case that is not properly encoded.
2127 ** notifications.el supports now version 1.2 of the Notifications API.
2128 The function `notifications-get-capabilities' returns the supported
2131 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2132 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2133 `flymake-warning-bitmap'.
2135 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2136 specifying URL types that should be converted to remote file names at
2137 the FFAP prompt. The default is now '("ftp").
2139 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2140 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2142 ** New option `mouse-avoidance-banish-position' specifies where the
2143 `banish' mouse avoidance setting moves the mouse.
2145 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2146 closing brackets to be aligned with the line of the opening bracket.
2148 ** In Proced mode, new command `proced-renice' renices marked processes.
2150 ** New option `async-shell-command-buffer' specifies the buffer to use
2151 for a new asynchronous `shell-command' when the default output buffer
2152 `*Async Shell Command*' is already in use.
2154 ** SQL mode has a new option `sql-db2-escape-newlines'.
2155 If non-nil, newlines sent to the command interpreter will be escaped
2156 by a backslash. The default does not escape the newlines and assumes
2157 that the sql statement will be terminated by a semicolon.
2159 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2160 (and modes that derive from it), sorts the column at point, or the Nth
2161 column if a numeric prefix argument is given.
2163 ** `which-func-modes' now defaults to t, so Which Function mode, when
2164 enabled, applies to all applicable major modes.
2166 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2169 ** Follow mode no longer works by using advice.
2170 The option `follow-intercept-processes' has been removed.
2172 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2174 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2175 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2176 *** semantic-change-hooks -> semantic-change-functions
2177 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2178 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2179 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2180 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2181 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2182 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2183 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2184 *** rcirc-activity-hooks -> rcirc-activity-functions
2185 *** rcirc-print-hooks -> rcirc-print-functions
2186 *** dbus-event-error-hooks -> dbus-event-error-functions
2187 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2188 *** checkdoc-style-hooks -> checkdoc-style-functions
2189 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2190 *** archive-extract-hooks -> archive-extract-hook
2191 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2192 *** hfy-post-html-hooks -> hfy-post-html-hook
2193 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2194 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2195 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2196 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2198 ** Obsolete packages
2201 In most cases, assoc+member+push+delq work just as well.
2202 And in any case it's just a terrible package: ugly semantics, terrible
2203 inefficiency, and not namespace-clean.
2212 * Incompatible Lisp Changes in Emacs 24.3
2214 ** Docstrings starting with `*' no longer indicate user options.
2215 Only variables defined using `defcustom' are considered user options.
2216 The function `user-variable-p' is now an obsolete alias for
2217 `custom-variable-p'.
2219 ** The return values of `defalias', `defun' and `defmacro' have changed,
2220 and are now undefined. For backwards compatibility, `defun' and
2221 `defmacro' currently return the name of the newly defined
2222 function/macro, but this should not be relied upon.
2224 ** `random' by default now returns a different random sequence in
2225 every Emacs run. Use `(random S)', where S is a string, to set the
2226 random seed to a value based on S, in order to get a repeatable
2227 sequence in later calls.
2229 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2230 that substring is inserted literally even if the LITERAL arg is
2231 non-nil, instead of causing an error to be signaled.
2233 ** `select-window' now always makes the window's buffer current.
2234 It does so even if the window was selected before.
2236 ** The function `x-select-font' can return a font spec, instead of a
2237 font name as a string. Whether it returns a font spec or a font name
2238 depends on the graphical library.
2240 ** `face-spec-set' no longer sets frame-specific attributes when the
2241 third argument is a frame (that usage was obsolete since Emacs 22.2).
2243 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2245 ** The CL package's `get-setf-method' function no longer exists.
2246 Generalized variables are now part of core Emacs Lisp, and implemented
2247 differently to the way cl.el used to do it. It is not possible to
2248 define a compatible replacement for `get-setf-method'. See the file
2249 gv.el for internal details of the new implementation.
2251 ** The arguments of `dbus-register-signal' are no longer just strings,
2252 but keywords or keyword-string pairs. The old argument list will
2253 still be supported for Emacs 24.x.
2255 ** Miscellaneous name changes
2256 Some Lisp symbols have been renamed to correct their spelling,
2257 or to be more consistent with standard Emacs terminology.
2259 *** Renamed functions
2260 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2261 **** inactivate-input-method -> deactivate-input-method
2262 **** quail-inactivate -> quail-deactivate
2263 **** robin-inactivate -> robin-deactivate
2264 **** viper-inactivate-input-method -> viper-deactivate-input-method
2265 **** viper-inactivate-input-method-action ->
2266 viper-deactivate-input-method-action
2267 **** ucs-input-inactivate -> ucs-input-deactivate
2270 The old hooks are still supported for backward compatibility, but they
2271 are deprecated and will be removed eventually.
2272 **** input-method-inactivate-hook -> input-method-deactivate-hook
2273 **** robin-inactivate-hook -> robin-deactivate-hook
2274 **** quail-inactivate-hook -> quail-deactivate-hook
2276 *** Renamed variables
2277 **** follow-deactive-menu -> follow-inactive-menu
2278 **** inactivate-current-input-method-function ->
2279 deactivate-current-input-method-function
2281 ** Some obsolete functions, variables, and faces have been removed:
2282 *** `last-input-char', `last-command-char', `unread-command-char'
2283 *** `facemenu-unlisted-faces'
2284 *** `rmail-decode-mime-charset'
2285 *** `iswitchb-read-buffer'
2286 *** `sc-version', `sc-submit-bug-report'
2287 *** `set-char-table-default'
2288 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2289 *** `compile-internal'
2291 *** `mode-line-inverse-video'
2292 *** `follow-mode-off-hook'
2293 *** `cvs-commit-buffer-require-final-newline'
2294 (use `log-edit-require-final-newline' instead)
2295 *** `cvs-changelog-full-paragraphs'
2296 (use `log-edit-changelog-full-paragraphs' instead)
2297 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2298 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2299 *** `vc-master-templates' (use `vc-handled-backends' instead)
2300 *** `vc-checkout-carefully'
2303 * Lisp Changes in Emacs 24.3
2305 ** CL-style generalized variables are now in core Elisp.
2306 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2307 You can define your own generalized variables using `gv-define-simple-setter',
2308 `gv-define-setter', etc.
2310 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2311 This can significantly speed up execution of non-byte-compiled code,
2312 but can also bump into previously unnoticed cyclic dependencies.
2313 These are generally harmless: they will simply cause the macro calls
2314 to be left for later expansion (as before), but will result in a
2315 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2316 You may wish to restructure your code so this does not happen.
2318 ** New sampling-based Elisp profiler.
2319 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2320 When finished, use M-x profiler-stop. The sampling rate can be based on
2321 CPU time or memory allocations.
2323 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2324 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2326 ** New macros `setq-local' and `defvar-local'.
2328 ** Face underlining can now use a wave.
2330 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2331 of `read-regexp' accepts a string ending with a colon and space, and its
2332 second argument DEFAULTS can be a list of strings accessible via `M-n'
2333 in the minibuffer ahead of other hard-coded useful regexp-related values.
2334 More commands use `read-regexp' now to read their regexp arguments.
2338 *** New function `completion-table-with-quoting' to handle completion
2339 in the presence of quoting, such as file completion in shell buffers.
2341 *** New function `completion-table-subvert' to use an existing completion
2342 table, but with a different prefix.
2346 *** New error type and new function `user-error'.
2347 These do not trigger the debugger.
2349 *** New option `debugger-bury-or-kill', saying what to do with the
2350 debugger buffer when exiting debug.
2352 *** Set `debug-on-message' to enter the debugger when a certain
2353 message is displayed in the echo area. This can be useful when trying
2354 to work out which code is doing something.
2356 *** New var `inhibit-debugger', automatically set to prevent accidental
2357 recursive invocations.
2361 *** New command `fit-frame-to-buffer' adjusts the frame height to
2364 *** The command `fit-window-to-buffer' can adjust the frame height
2365 if the new option `fit-frame-to-buffer' is non-nil.
2367 *** New macro `with-temp-buffer-window', similar to
2368 `with-output-to-temp-buffer'.
2370 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2373 *** New option `switch-to-buffer-preserve-window-point' to restore a
2374 window's point when switching buffers.
2376 *** New display action alist entries `window-height' and `window-width'
2377 specify the size of new windows created by `display-buffer'.
2379 *** New display action alist entry `pop-up-frame-parameters', if
2380 non-nil, specifies frame parameters to give any newly-created frame.
2382 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2383 tells display action functions to avoid changing which frame is
2386 *** New display action alist entry `previous-window', if non-nil,
2387 specifies window to reuse in `display-buffer-in-previous-window'.
2389 *** New display action functions `display-buffer-below-selected',
2390 and `display-buffer-in-previous-window'.
2392 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2393 now accept a third argument to avoid choosing the selected window.
2395 *** Additional values recognized for option `window-combination-limit'.
2397 *** The following variables are obsolete, as they can be replaced by
2398 appropriate entries in the `display-buffer-alist' function introduced
2400 **** `dired-shrink-to-fit'
2401 **** `display-buffer-reuse-frames'
2402 **** `display-buffer-function'
2403 **** `special-display-buffer-names'
2404 **** `special-display-frame-alist'
2405 **** `special-display-function'
2406 **** `special-display-regexps'
2410 *** `current-time-string' no longer requires that its argument's year
2411 must be in the range 1000..9999. It now works with any year supported
2412 by the underlying C implementation.
2414 *** `current-time' now returns extended-format time stamps
2415 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2416 PSEC is typically a multiple of 1000 on current machines. Other
2417 functions that use this format, such as `file-attributes' and
2418 `format-time-string', have been changed accordingly. Old-format time
2419 stamps are still accepted.
2421 *** The format of timers in `timer-list' and `timer-idle-list' is now
2422 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2423 The PSECS slot is new, and uses picosecond resolution. It can be
2424 accessed via the new `timer--psecs' accessor.
2426 *** Last-modified time stamps in undo lists now are of the form
2427 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2431 *** Improved security when handling persistent objects:
2433 **** `eieio-persistent-read' now features optional arguments for specifying
2434 the class to load, as well as a flag stating whether subclasses are allowed;
2435 if provided, other classes will be rejected by the reader. For
2436 compatibility with existing code, if the class is omitted only a
2439 **** New specialized reader for pulling in classes and signaling errors
2440 without evaluation of suspicious code.
2442 **** All slots that contain objects must have a :type. Slots with lists
2443 of objects must use a new type predicate for a list of an object type.
2445 *** Support for `find-function' and similar utilities, through the addition
2446 of filename support to generated symbols.
2448 ** Floating point functions now always return special values like NaN,
2449 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2450 Previously, they returned NaNs on some platforms but signaled errors
2451 on others. The affected functions are acos, asin, tan, exp, expt,
2452 log, log10, sqrt, and mod.
2454 ** New fringe bitmap `exclamation-mark'.
2456 ** Miscellaneous changes to special forms and macros
2458 *** `defun' and `defmacro' are now macros rather than special forms.
2460 *** `kbd' is now a function rather than a macro.
2462 ** Miscellaneous new functions
2464 *** `set-temporary-overlay-map' sets up a temporary keymap that
2465 takes precedence over most other maps for a short while (normally one key).
2467 *** `autoloadp' tests if its argument is an autoloaded object.
2469 *** `autoload-do-load' performs the autoloading operation.
2471 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2473 *** `file-name-base' returns a file name sans directory and extension.
2475 *** `function-get' fetches a function property, following aliases.
2477 *** `posnp' tests if an object is a `posn'.
2479 *** `system-users' returns the user names on the system.
2481 *** `system-groups' returns the group names on the system.
2483 *** `tty-top-frame' returns the topmost frame of a text terminal.
2485 ** The following functions and variables are obsolete:
2486 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2487 *** `buffer-has-markers-at'
2488 *** `macro-declaration-function' (use `macro-declarations-alist')
2489 *** `window-system-version' (provides no useful information)
2490 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2491 *** `query-replace-interactive'
2492 *** `font-list-limit' (has had no effect since Emacs < 23)
2495 * Changes in Emacs 24.3 on Non-Free Operating Systems
2497 ** Cygwin builds can use the native MS Windows user interface.
2498 Pass `--with-w32' to configure. The default remains the X11 interface.
2500 ** Two new functions are available in Cygwin builds:
2501 `cygwin-convert-file-name-from-windows' and
2502 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2503 code to access the Cygwin file-name mapping machinery to convert
2504 between Cygwin and Windows-native file and directory names.
2506 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2507 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2508 `mouse-autoselect-window'.
2510 ** On MS Windows Vista and later Emacs now supports symbolic links.
2512 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2513 support for libxml2, even if its presence is detected.
2515 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2517 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2518 directories to the search path. You must add them yourself if you want them.
2521 * Changes in Emacs 24.2
2523 ** This is mainly a bug-fix release.
2526 * Installation Changes in Emacs 24.1
2528 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2529 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2530 also depend on Gtk+. You can disable them with --without-rsvg and
2533 ** Emacs can be compiled with GnuTLS support.
2534 This happens by default if a suitably recent version of the library is
2535 found at build time. To prevent this, use the configure option
2536 `--without-gnutls'. See below for GnuTLS features.
2538 ** Emacs can be compiled with SELinux support.
2539 This happens by default if a suitably recent version of the library is
2540 found at build time. To prevent this, use the configure option
2541 `--without-selinux'. See below for SELinux features.
2543 ** Emacs can be compiled with ImageMagick support.
2544 This happens by default if a suitably recent version of the library is
2545 found at build time. To prevent this, use the configure option
2546 `--without-imagemagick'. See below for ImageMagick features.
2547 This feature is not available for the Nextstep or MS ports.
2549 ** Emacs can be compiled with libxml2 support.
2550 This happens by default if a suitably recent version of the library is
2551 found at build time. To prevent this, use the configure option
2552 `--without-xml2'. See below for libxml2 features.
2554 ** By default, the installed Info and man pages are compressed.
2555 You can disable this by configuring --without-compress-info.
2557 ** New configure option --with-wide-int.
2558 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2559 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2562 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2563 These provide no new functionality, they just remove the need to edit
2564 lib-src/Makefile by hand in order to use the associated features.
2566 ** New configure option --enable-use-lisp-union-type.
2567 This is only useful for Emacs developers to debug certain types of bugs.
2568 This is not a new feature; only the configure flag is new.
2570 ** The standalone programs digest-doc and sorted-doc are removed.
2571 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2573 ** The standalone program `fakemail' is removed.
2574 If you need it, feedmail.el provides a superset of the functionality.
2577 * Startup Changes in Emacs 24.1
2579 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2580 command line arguments, and the EMACS_UNIBYTE environment variable, no
2581 longer have any effect. (They were declared obsolete in Emacs 23.)
2583 ** New command line option `--no-site-lisp' removes site-lisp directories
2584 from load-path. -Q now implies this. This option does not affect the
2585 EMACSLOADPATH environment variable (and hence has no effect for
2589 * Changes in Emacs 24.1
2593 *** Many packages now use the `completion-at-point' command,
2594 rather than implementing separate completion commands.
2596 *** `completion-at-point' now handles tags and semantic completion.
2598 *** Completion in a non-minibuffer now tries to detect the end of completion
2599 and pops down the *Completions* buffer accordingly.
2601 *** New option `completion-cycle-threshold' allows completion cycling.
2603 *** New option `completion-category-overrides' for overriding the
2604 default completion style in certain circumstances.
2606 *** New completion style `substring'.
2608 *** Completion of buffer names uses `substring' completion by default.
2610 *** The option `widget-complete-field' has been removed.
2614 *** The first time you try sending mail, Emacs asks for a mail method.
2615 This is implemented by a new default for `send-mail-function', which
2616 is `sendmail-query-once'. This offers to use the smtpmail package, or
2617 to use the old defaults relying on external mail facilities
2618 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2619 `mailclient-send-it' on Windows).
2621 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2622 transfers the report to your desktop's preferred mail client, if there
2623 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2626 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2627 and Mail mode changes
2629 ** Emacs server and client changes
2631 *** New option `server-port' specifies the port for TCP Emacs servers.
2633 *** New emacsclient argument -q/--quiet suppresses some status messages.
2635 *** New emacsclient argument --frame-parameters specifies the frame
2636 parameters of any newly-created graphical frame.
2638 *** If emacsclient shuts down due to Emacs signaling an error,
2639 its exit status is 1.
2641 *** New emacsclient argument --parent-id ID.
2642 This opens a client frame in parent X window ID, via XEmbed, similar
2643 to the --parent-id argument to Emacs.
2645 ** Internationalization changes
2647 *** Emacs now supports display and editing of bidirectional text.
2648 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2649 displayed in the correct visual order as expected by users of those
2650 scripts. The display reordering is a "full bidirectionality" class
2651 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2652 with no RTL text should look exactly the same as before.
2654 **** New buffer-local variable `bidi-display-reordering'.
2655 To disable display reordering in a buffer, change this to nil.
2657 **** New buffer-local variable `bidi-paragraph-direction'.
2658 If nil (the default), Emacs determines the base direction of each
2659 paragraph from its text, as specified by the UBA. Setting the value
2660 to `right-to-left' or `left-to-right' forces a base direction on each
2663 Paragraphs with right-to-left base direction are displayed starting at
2664 the right window edge.
2666 *** Enhanced support for characters with no glyphs in available fonts,
2667 or, on text terminals, characters that cannot be encoded by the
2668 terminal coding system. The new option `glyphless-char-display-control'
2669 specifies how to display them: as a hexadecimal code in a box, a thin
2670 1-pixel space, an empty box, etc.
2672 *** New input methods for Farsi and Bulgarian
2673 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2675 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2676 (U+2010 and U+2011).
2678 *** New Hebrew translation of the Emacs Tutorial.
2679 Type `C-u C-h t' to choose it in case your language setup doesn't
2680 automatically select it.
2682 ** An Emacs Lisp package manager is now included.
2683 This is a convenient way to download and install additional packages,
2684 from a package repository at http://elpa.gnu.org.
2686 *** M-x list-packages shows a list of packages, which can be
2687 selected for installation.
2689 *** New command `describe-package', bound to `C-h P'.
2691 *** By default, all installed packages are loaded automatically when
2692 Emacs starts up. To disable this, set `package-enable-at-startup' to
2693 nil. To specify the packages to load, customize `package-load-list'.
2695 ** Custom theme changes
2697 *** New command `M-x customize-themes', which provides a convenient
2698 interface for enabling and disabling Custom themes.
2700 *** New option `custom-theme-load-path' is the load path for themes.
2701 Emacs no longer looks for Custom themes in `load-path'. The default
2702 value of `custom-theme-load-path' says to look for themes in
2703 `custom-theme-directory', followed by a subdirectory of
2704 `data-directory' named "themes/", which contains a small selection of
2705 built-in Custom themes.
2707 *** New option `custom-safe-themes' records known-safe theme files.
2708 If a theme is not in this list, Emacs queries before loading it, and
2709 offers to save the theme to `custom-safe-themes' automatically. By
2710 default, all themes included in Emacs are treated as safe.
2712 ** Improved GTK integration
2714 *** GTK scroll-bars are now placed on the right by default.
2715 The function `set-scroll-bar-mode' can change this.
2717 *** GTK tool bars can have just text, just images or images and text.
2718 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2719 the default is taken from desktop settings.
2721 *** GTK tool bars can be placed on any edge of the frame.
2722 The frame-parameter tool-bar-position controls this. It takes the
2723 values top, left, right or bottom. The Options => Show/Hide menu has
2726 *** The default colors for selected text (the `region' face) are taken
2727 from the GTK theme when Emacs is built with GTK.
2729 *** Emacs uses GTK tooltips by default if built with GTK.
2730 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2732 ** Graphical interface changes
2734 *** On graphical displays, the mode-line no longer ends in dashes.
2735 Also, the first dash (which does not indicate anything) is just
2736 displayed as a space.
2738 *** `menu-bar-select-buffer-function' lets you choose another operation
2739 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2741 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2742 built with Xft. These fonts can be set via X resources, for example:
2743 Emacs.pane.menubar.font: Courier-12
2747 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2748 or if it receives a SIGINT signal in batch mode.
2750 *** `kill-emacs-hook' is now also run in batch mode.
2751 Third-party code which adds to `kill-emacs-hook' should check if they
2752 do the right thing in batch mode.
2754 ** Scrolling changes
2756 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2757 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2758 of buffer at first key-press (instead they move to top/bottom of buffer)
2759 when `scroll-error-top-bottom' is non-nil.
2761 *** New option `scroll-error-top-bottom' (see above).
2763 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2764 scroll a line instead of full screen.
2766 *** New property `scroll-command' should be set on a command's symbol to
2767 define it as a scroll command affected by `scroll-preserve-screen-position'.
2769 *** If you customize `scroll-conservatively' to a value greater than 100,
2770 Emacs will never recenter point in the window when it scrolls due to
2771 cursor motion commands or commands that move point (e.f., `M-g M-g').
2772 Previously, you needed to use `most-positive-fixnum' as the value of
2773 `scroll-conservatively' to achieve the same effect.
2775 *** "Aggressive" scrolling now honors the scroll margins.
2776 If you customize `scroll-up-aggressively' or
2777 `scroll-down-aggressively' and move point off the window, Emacs now
2778 scrolls the window so as to avoid positioning point inside the scroll
2781 ** Basic SELinux support has been added.
2782 This requires Emacs to be linked with libselinux at build time.
2784 *** Emacs preserves the SELinux file context when backing up.
2785 Also, the function `copy-file' has an extra optional argument for
2786 preserving SELinux context, and the return value of `backup-buffer'
2787 now includes the SELinux context.
2789 *** New functions `file-selinux-context' and `set-file-selinux-context'
2790 get and set the SELinux context of a file.
2794 *** `delete-by-moving-to-trash' now only affects commands that specify
2795 trashing. This avoids inadvertently trashing temporary files.
2797 *** Calling `delete-file' or `delete-directory' with a prefix argument
2798 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2800 ** File- and directory-local variable changes
2802 *** You can stop directory local vars from applying to subdirectories.
2803 Add an element (subdirs . nil) to the alist portion of any variables
2804 settings to indicate that the section should not apply to
2807 *** Directory local variables can apply to some file-less buffers.
2808 Affected modes include dired, vc-dir, and log-edit. For example,
2809 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2810 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2811 `hack-dir-local-variables-non-file-buffer' to support this.
2813 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2814 Instead, use "eval: (minor-mode 1)".
2816 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2817 to `inhibit-local-variables-regexps'. As the name suggests, it now
2818 applies to ALL file local variables, not just -*- lines. The
2819 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2824 *** The `quit-window' command now restores the last buffer displayed
2825 in the quitted window.
2827 *** Resizing an Emacs frame now preserves proportional window sizes,
2828 modulo restrictions like window minimum sizes and fixed-size windows.
2830 *** The behavior of `display-buffer' is now customizable in detail.
2832 **** New option `display-buffer-base-action' specifies a list of
2833 user-determined display "actions" (functions and optional arguments
2834 for choosing the displaying window).
2836 This takes precedence over the default display action, which is
2837 specified by `display-buffer-fallback-action'.
2839 **** New option `display-buffer-alist' maps buffer name regexps to
2840 display actions, taking precedence over `display-buffer-base-action'.
2842 *** New option `window-combination-limit'.
2843 The new option `window-combination-limit' allows to return the space
2844 obtained for resizing or creating a window more reliably to the window
2845 from which such space was obtained.
2847 *** New option `window-combination-resize'.
2848 The new option `window-combination-resize' allows to split a window that
2849 otherwise cannot be split because it's too small by stealing space from
2850 other windows in the same combination. Subsequent resizing or deletion
2851 of the window will resize all windows in the same combination as well.
2853 *** New option `frame-auto-hide-function' lets you choose between
2854 iconifying or deleting a frame when burying a buffer in a dedicated
2855 frame, or quitting a window showing a buffer in a frame of its own.
2857 *** New commands `maximize-window' and `minimize-window'.
2858 These maximize and minimize the size of a window within its frame.
2860 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2861 These functions allow to navigate through the live buffers that have
2862 been shown in a specific window.
2864 ** Minibuffer changes
2866 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2867 This is handy for minibuffer-only frames, and is also used for the feature
2868 where mouse-1 pops up *Messages*"', which can now easily be changed.
2870 *** Minibuffers set `truncate-lines' to nil.
2871 If you want to change the value to something else, you could use
2872 for example `minibuffer-setup-hook'.
2874 ** `auto-mode-case-fold' is now enabled by default.
2876 ** `backup-by-copying-when-mismatch' now defaults to t.
2878 ** New basic faces `error', `warning', `success'.
2879 These are used to highlight text indicating failure, caution or
2880 successful operation.
2882 ** New option `list-colors-sort' defines the color sort order
2883 for `list-colors-display'.
2885 ** The variable `focus-follows-mouse' now always defaults to nil.
2888 * Editing Changes in Emacs 24.1
2892 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2893 `isearch-yank-line'.
2895 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2896 `isearch-yank-kill'.
2898 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2900 ** New commands `count-words-region' and `count-words'.
2902 *** M-= is bound to `count-words-region', not `count-lines-region'.
2903 The `count-words-region' command, when called interactively, reports
2904 the number of lines, words, and characters in the region. It is a
2905 superset of the old `count-lines-region', which is now an obsolete
2908 ** The command `just-one-space' (M-SPC), if given a negative argument,
2909 also deletes newlines around point.
2913 *** New option `delete-active-region'.
2914 If non-nil, [delete] and DEL delete the region if it is active and no
2915 prefix argument is given. If set to `kill', those commands kill
2918 *** New command `delete-forward-char', bound to [delete].
2919 This is meant for interactive use, and obeys `delete-active-region'.
2920 The command `delete-char' does not obey `delete-active-region'.
2922 *** `delete-backward-char' is now a Lisp function.
2923 Apart from obeying `delete-active-region', its behavior is unchanged.
2924 However, the byte compiler now warns if it is called from Lisp; Lisp
2925 callers should use delete-char with a negative argument instead.
2927 *** The option `mouse-region-delete-keys' has been deleted.
2929 ** Selection changes.
2931 The default handling of clipboard and primary selections has been
2932 changed to conform with modern X applications. In short, most
2933 commands for killing and yanking text now use the clipboard, while
2934 mouse commands use the primary selection.
2936 In the following, we provide a list of these changes, followed by a
2937 list of steps to get the old behavior back if you prefer that.
2939 *** `select-active-regions' now defaults to t.
2940 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2941 the kill ring. The selected text is put in the primary selection, if
2942 the system possesses a separate primary selection facility (e.g. X).
2944 **** `select-active-regions' also accepts a new value, `only'.
2945 This means to only set the primary selection for temporarily active
2946 regions (usually made by mouse-dragging or shift-selection);
2947 "ordinary" active regions, such as those made with C-SPC followed by
2948 point motion, do not alter the primary selection.
2950 **** `mouse-drag-copy-region' now defaults to nil.
2952 *** mouse-2 is now bound to `mouse-yank-primary'.
2953 This pastes from the primary selection, ignoring the kill-ring.
2954 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2956 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2958 *** `x-select-enable-primary' now defaults to nil.
2959 Thus, commands that kill text or copy it to the kill-ring (such as
2960 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2962 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2963 exactly equivalent to M-w, C-w, and C-y respectively.
2965 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2966 non-nil by default, as Windows does not support the primary selection
2967 between applications.
2969 *** To return to the previous behavior, do the following:
2971 **** Change `select-active-regions' to nil.
2972 **** Change `mouse-drag-copy-region' to t.
2973 **** Change `x-select-enable-primary' to t (on X only).
2974 **** Change `x-select-enable-clipboard' to nil.
2975 **** Bind `mouse-yank-at-click' to mouse-2.
2977 *** Support for X cut buffers has been removed.
2979 *** X clipboard managers are now supported.
2980 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2982 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2983 in the current rectangle. With a prefix argument, this prompts for a
2984 number to count from and for a format string.
2986 ** `redisplay-dont-pause' now defaults to t.
2987 This makes Emacs feel more responsive to editing commands that arrive
2988 at high rate, e.g. if you lean on some key, because stopping redisplay
2989 in the middle (when this variable is nil) forces more expensive
2990 updates later on, and Emacs appears to be unable to keep up.
2992 ** The behavior of <TAB> for active regions in Text mode has changed.
2993 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2994 when the region is active causes Emacs to indent all the lines in the
2995 region, aligning them with the line previous to the first line in the
2996 region (or with the left margin if there is no previous line).
2998 ** When `occur' is called with a prefix argument, matching strings are
2999 collected into the `*Occur*' buffer without line numbers. If there
3000 are parenthesized subexpressions in the specified regexp, `occur'
3001 reads replacement text that may contain \\& and \\N whose convention
3002 follows `replace-match'.
3005 * Changes in Specialized Modes and Packages in Emacs 24.1
3007 ** Archive Mode has basic support for browsing and updating 7z archives.
3011 *** BibTeX mode now supports biblatex.
3012 Use the variable `bibtex-dialect' to select different BibTeX dialects.
3013 `bibtex-entry-field-alist' is now an obsolete alias for
3014 `bibtex-BibTeX-entry-alist'.
3016 *** New command `bibtex-search-entries', bound to C-c C-a.
3018 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
3020 *** New variable `bibtex-search-entry-globally'.
3024 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
3026 *** The default browser used by the package is now the "xdg-open" program,
3027 on platforms that support it. This calls your desktop's preferred browser.
3031 *** Support for musical notes.
3033 *** Support for logarithmic units.
3035 *** No longer uses the tex prefix for TeX specific unit names when
3036 using TeX or LaTeX mode.
3038 *** New option to highlight selections using faces.
3040 *** `calc-histogram' has the option of using a vector to determine the bins.
3042 *** New "O" option prefix.
3044 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
3046 ** Calendar, Diary, and Appt
3048 *** Diary entries can contain non-printing "comments".
3049 See the variable `diary-comment-start'.
3051 *** Appointments can specify their individual warning times.
3052 See the variable `appt-warning-time-regexp'.
3054 *** The function specified by `appt-disp-window-function' may be passed
3055 lists of arguments if multiple appointments are due at similar times.
3056 If you are using a custom function for this, you should update it.
3058 *** New function `diary-hebrew-birthday'.
3060 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
3061 may no longer be nil, but must all be strings.
3063 *** The obsolete (since Emacs 22.1) method of enabling the appt
3064 package by adding `appt-make-list' to `diary-hook' has been removed.
3065 Use `appt-activate' instead.
3067 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
3068 appt-issue-message (use the function appt-activate)
3069 appt-visible/appt-msg-window (use the variable appt-display-format)
3071 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
3072 view-diary-entries, list-diary-entries, show-all-diary-entries
3076 *** New feature to "guess" the style in an existing buffer.
3077 The main entry point is M-x c-guess.
3079 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
3081 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
3082 Thus C-M-a will, by default, go to the beginning of the immediate function,
3085 *** "Macros with semicolons" can be registered for correct indentation.
3086 Where such a macro ends a line (no semicolon) the next statement is no longer
3087 parsed as a statement continuation.
3089 ** Comint and modes derived from it use the standard completion code.
3093 *** Compilation mode can be used without Font Lock mode.
3094 `compilation-parse-errors-function' is now obsolete.
3096 *** New variable `compilation-filter-start', which is bound while
3097 `compilation-filter-hook' runs. It records the start position of the
3098 text inserted by `compilation-filter'.
3100 *** `compilation-error-screen-columns' and `compilation-first-column'
3101 are obeyed in the editing buffer. So programming language modes can
3102 set them, whereas previously only the value in the *Compilation*
3107 *** Customize buffers now contain a search field.
3108 The search is performed using `customize-apropos'.
3109 To turn off the search field, set `custom-search-field' to nil.
3111 *** Options in customize group buffers start out hidden if not customized.
3112 Use the arrow to the left of the option name to toggle visibility.
3114 *** custom-buffer-sort-alphabetically now defaults to t.
3116 *** The color widget now has a "Choose" button, which allows you to
3117 choose a color via `list-colors-display'.
3121 *** It is now possible to access buses other than the default system
3124 *** The `dbus-register-method' and `dbus-register-property' functions
3125 optionally do not register names.
3127 *** The new function `dbus-register-service' registers a known service
3128 name on a D-Bus without also registering a property or a method.
3132 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3133 if called with a prefix argument, read a file name from the minibuffer
3134 instead of using the current buffer.
3136 *** The "dired local variables" feature of Dired-x is obsolete.
3137 The standard directory local variables feature replaces it.
3141 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3142 controlling attempts to autojoin a channel.
3144 *** New variable `erc-coding-system-precedence': If we use `undecided'
3145 as the server coding system, this variable will then be consulted.
3146 The default is to decode strings that can be decoded as utf-8 as
3147 utf-8, and do the normal `undecided' decoding for the rest.
3151 *** The default value of `eshell-directory-name' has changed
3152 to be an "eshell" directory in `user-emacs-directory'.
3153 The old "~/.eshell/" directory is still used if it exists, though.
3157 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3158 It now supports multithread non-stop debugging and simultaneous
3159 debugging of several threads.
3163 *** RET (`image-toggle-animation') toggles animation, if applicable.
3164 Animation plays once, unless the option `image-animate-loop' is non-nil.
3168 *** New command M-x info-display-manual displays a named Info manual.
3169 If that manual is already visited in some Info buffer, it displays
3170 that buffer. (This is handy if you have many manuals in many *info*
3171 buffers, and don't remember the name of the buffer visiting the manual
3172 you want to consult.) Otherwise, it loads and displays the manual.
3174 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3175 This is for compatibility with the stand-alone Info reader program,
3176 and also because `Info-edit' is a rarely used command that is disabled
3179 ** Mail mode changes (not Message mode)
3181 *** New command M-x mail-add-attachment for adding MIME attachments
3183 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3184 (Its name is misleading, since it has nothing to do with MIME
3185 attachments.) The old name is now an obsolete alias to the new name.
3187 ** MH-E has been updated to MH-E version 8.3.1.
3188 See MH-E-NEWS for details.
3190 ** Modula-2 mode provides auto-indentation.
3192 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3194 ** nXML mode no longer binds C-RET to `nxml-complete'.
3195 Completion is now performed via `completion-at-point', bound to C-M-i
3196 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3197 default), this performs tag completion.
3199 ** Org mode has been updated to version 7.8.09.
3200 See ORG-NEWS for details.
3202 ** Prolog mode has been completely revamped, with lots of additional
3203 functionality such as more intelligent indentation, electricity,
3204 support for more variants, including Mercury, and a lot more.
3208 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3209 in the Rmail incoming message.
3211 *** The variable `rmail-message-filter' no longer has any effect.
3212 This change was made in Emacs 23.1 but was not advertised at the time.
3213 Try using `rmail-show-message-hook' instead.
3217 *** M-x shell prompts for the shell path name if the default directory
3218 is a remote file name and neither the environment variable $ESHELL nor
3219 the variable `explicit-shell-file-name' is set.
3221 *** TAB is now bound to the standard `completion-at-point' command,
3222 which now implements the pcomplete rules for shell command completion.
3226 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3227 if the mail server supports them. This uses either built-in GnuTLS
3228 support, or the starttls.el library. Customize `smtpmail-stream-type'
3231 *** The variable `smtpmail-auth-credentials' has been removed.
3232 By default, the information is now stored in the file ~/.authinfo.
3233 This was the default value of smtpmail-auth-credentials. If you had
3234 customized smtpmail-auth-credentials to a list of user names and
3235 passwords, those settings are not used. During your first connection
3236 to the smtp server, Emacs will prompt for the user name and password,
3237 and offer to save them to ~/.authinfo. Or you can manually copy the
3238 credentials to ~/.authinfo. For example, if you had
3240 (setq smtpmail-auth-credentials
3241 '(("mail.example.org" 25 "jim" "s!cret")))
3243 then the equivalent line in ~/.authinfo would be
3245 machine mail.example.org port 25 login jim password s!cret
3247 See the auth-source manual for more information, e.g. on encrypting
3248 the credentials file.
3250 *** The variable `smtpmail-starttls-credentials' has been removed.
3251 If you had that set, you need to put
3253 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3255 in your ~/.authinfo file instead.
3257 *** SMTPmail defaults to using the address in the From: header as the
3258 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3259 to the address you wish to use instead.
3263 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3264 and `sql-oracle-scan-on'.
3266 *** New options controlling prompting for login parameters.
3267 Each supported product has a custom variable `sql-*-login-params',
3268 which is a list of the parameters to be prompted for before a
3269 connection is established.
3271 *** The command `sql-product-interactive' now takes a prefix argument,
3272 which causes it to prompt for an SQL product.
3274 *** Product-specific SQL interactive commands now take prefix arguments.
3275 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3276 given a prefix argument, prompt for a name for the SQL interactive
3277 buffer. This reduces the need for calling `sql-rename-buffer'.
3279 *** SQL interactive modes suppress command continuation prompts, and
3280 replace tabs with spaces. The first change impacts multiple line SQL
3281 statements entered with C-j between each line, statements yanked into
3282 the buffer and statements sent with `sql-send-*' functions. The
3283 second prevents the MySQL and Postgres interpreters from listing
3284 object name completions when sent text via `sql-send-*' functions.
3286 *** New command `sql-connect' starts a predefined SQLi session,
3287 using the login parameters from `sql-connection-alist'.
3289 *** New "Save Connection" menu item in SQLi buffers.
3290 This gathers the login params specified for the SQLi session, if it
3291 was not started by a connection, and saves them as a new connection.
3293 *** New commands for listing database objects and details:
3294 sql-list-all and sql-list-table.
3296 *** An API for manipulating SQL product definitions has been added.
3300 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3304 *** New inline access method "ksu" (kerberized su).
3306 *** The following access methods are discontinued: "ssh1_old",
3307 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3309 *** The user option `remote-file-name-inhibit-cache' controls whether
3310 remote file attributes are cached for better performance.
3312 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3313 default value to "".
3315 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3316 for remote machines which support SELinux.
3318 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3319 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3320 the degree of parallelism.
3322 ** VC and related modes
3324 *** Support for pulling on distributed version control systems.
3325 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3326 supported (currently with Bzr, Git, and Mercurial), to update the
3327 current branch and working tree. A prefix argument means to prompt
3328 the user for specifics, e.g. a pull location.
3330 *** `vc-update' is now an alias for `vc-pull'.
3332 *** Support for merging on distributed version control systems.
3333 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3334 is supported (currently with Bzr, Git, and Mercurial), to merge
3335 changes from another branch into the current one. It prompts for
3336 specifics, e.g. a merge source.
3338 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3339 shows a diff while querying the user. It defaults to t.
3341 *** Log entries in some Log View buffers can be toggled to display a
3342 longer description by typing RET (log-view-toggle-entry-display).
3343 This is currently supported for Bzr, Git, and Mercurial (to support
3344 another backend, define a `log-view-expanded-log-entry-function').
3345 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3346 use this to display the full log entry for the revision at point.
3348 *** New command `vc-ediff' allows visual comparison of two revisions
3349 of a file similar to `vc-diff', but using ediff backend.
3351 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3352 this was not advertised at the time.
3354 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3355 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3356 this was not advertised at the time.
3362 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3364 *** partial-completion-mode (complete.el) is obsolete.
3365 You can get a comparable behavior with:
3366 (setq completion-styles '(partial-completion initials))
3367 (setq completion-pcm-complete-word-inserts-delimiters t)
3369 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3371 *** pgg is obsolete (use EasyPG instead).
3373 *** sregex.el is obsolete, since rx.el is a strict superset.
3375 *** s-region.el and pc-select.el are obsolete.
3376 They are superseded by shift-select-mode, enabled by default since 23.1.
3378 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3382 *** The Landmark game is now invoked with `landmark', not `lm'.
3383 Its functions and variables have been similarly renamed.
3385 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3386 (This interfered with cua-mode.)
3388 *** f90.el has some support for Fortran 2008 syntax.
3390 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3392 *** New command `nato-region' converts text to NATO phonetic alphabet.
3395 * New Modes and Packages in Emacs 24.1
3397 ** Occur Edit mode applies edits made in *Occur* buffers to the
3398 original buffers. It is bound to "e" in Occur mode.
3400 ** New global minor mode electric-pair-mode.
3401 When enabled, typing an open parenthesis automatically inserts the
3402 matching closing one.
3404 ** New global minor mode electric-indent-mode.
3405 When enabled, typing certain characters triggers reindentation.
3406 Major modes wishing to use this can set electric-indent-chars or
3407 electric-indent-functions.
3409 ** New global minor mode electric-layout-mode.
3410 When enabled, typing certain characters automatically inserts newlines.
3411 Major modes wishing to use this can set electric-layout-rules.
3413 ** tabulated-list.el provides a generic major mode for tabulated data,
3414 from which other modes can be derived.
3416 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3418 ** secrets.el is an implementation of the Secret Service API, an
3419 interface to password managers like GNOME Keyring or KDE Wallet. The
3420 Secret Service API requires D-Bus for communication. The command
3421 `secrets-show-secrets' offers a buffer with a visualization of the
3424 ** notifications.el provides an implementation of the Desktop
3425 Notifications API. It requires D-Bus for communication.
3427 ** soap-client.el supports access to SOAP web services from Emacs.
3428 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3430 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3432 ** New emacs-lock.el package.
3433 The previous version has been moved to obsolete/old-emacs-lock.el.
3434 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3435 against exiting Emacs and killing the buffer can be set separately.
3436 The mechanism for automatically turning off protection for buffers
3437 with dead inferior processes has been generalized.
3440 * Incompatible Lisp Changes in Emacs 24.1
3442 ** Passing a nil argument to a minor mode function call now ENABLES
3443 the minor mode unconditionally. This is so that you can write e.g.
3445 (add-hook 'text-mode-hook 'foo-mode)
3447 to enable foo-mode in Text mode buffers, removing the need for
3448 `turn-on-foo-mode' style functions. This affects all mode commands
3449 defined by `define-minor-mode'. If called interactively, the mode
3450 command still toggles the minor mode.
3452 ** The return value of `backup-buffer' has changed.
3453 It is now a list of three elements, where the second element is a list
3454 describing the original file's SELinux context. If Emacs or the
3455 system lacks SELinux support, the context list is (nil nil nil nil).
3456 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3458 ** `char-direction-table' and the `char-direction' function were deleted.
3459 They were buggy and inferior to the new support of bidirectional
3460 editing introduced in Emacs 24. If you need the bidirectional
3461 properties of a character, use `get-char-code-property' with the last
3462 argument `bidi-class'.
3464 ** `copy-directory' now copies the source directory as a subdirectory
3465 of the target directory, if the latter is an existing directory. The
3466 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3467 the contents directly into a pre-existing target directory.
3469 ** For mouse click input events in the text area, the Y pixel
3470 coordinate in the POSITION list now counts from the top of the text
3471 area, excluding any header line. Previously, it counted from the top
3474 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3475 been further reduced. Now a backquote not followed by a space is
3476 always treated as a "new-style" backquote. Please remove all
3477 "old-style" backquotes from your code. If your code uses backquotes
3478 as documented in the Elisp manual, and compiles without warning, then
3479 you have nothing to do in this regard. Code not following the
3480 appropriate conventions may fail to compile.
3482 The most common cause of trouble seems to be an old-style backquote
3483 followed by a newline. Another cause of trouble is vector notation
3484 for key sequence notation: instead of [(control ,)] and [(control ')],
3485 you should write [(control ?,)] and [(control ?')], which will work in
3488 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3489 was not advertised at the time. The function `custom-initialize-delay'
3490 replaced all known uses.
3492 ** `view-buffer' now treats special mode-class in the same way that
3493 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3494 major mode is special).
3496 ** Menu and tool bar changes
3498 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3499 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3500 With these alist entries omitted, `make-frame' checks the value of the
3501 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3502 a menu-bar or tool-bar, respectively. If the alist entries are added,
3503 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3505 *** The menu bar bindings's caches are not used any more.
3506 Use (where-is-internal <def> nil t) instead.
3508 ** Regions created by mouse dragging are now normal active regions,
3509 similar to those created by shift-selection (see Selection changes
3510 above). In previous Emacs versions, these regions were delineated by
3511 `mouse-drag-overlay'; that variable has been removed.
3513 ** The fourth argument of `filter-buffer-substring' has been removed.
3514 If you want to remove text properties from the final result, simply
3515 pass the result through substring-no-properties.
3517 ** cl.el no longer provides `cl-19'.
3519 ** The following obsolete functions and aliases have been removed
3520 (the appropriate new function is given in parentheses; "not needed"
3521 means you can just remove all calls to the function in question):
3523 *** `comint-kill-output' (`comint-delete-output')
3524 *** `decompose-composite-char' (`char-to-string')
3525 *** `outline-visible' (`outline-invisible-p')
3526 *** `internal-find-face' (`facep')
3527 *** `internal-get-face' (`facep and check-face')
3528 *** `frame-update-faces' (not needed)
3529 *** `frame-update-face-colors' (`frame-set-background-mode')
3530 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3531 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3532 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3533 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3534 *** `x-make-font-unbold' (`make-face-unbold')
3535 *** `x-make-font-unitalic' (`make-face-unitalic')
3536 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3537 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3538 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3539 *** `char-bytes' (== 1)
3540 *** `isearch-return-char' (`isearch-printing-char')
3541 *** `make-local-hook' (not needed)
3542 *** `set-screen-height' (`set-frame-height')
3543 *** `set-screen-width' (`set-frame-width')
3545 ** The following obsolete variables and varaliases have been removed
3546 (the appropriate new variable is given in parentheses):
3548 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3549 *** `vc-header-alist' (`vc-BACKEND-header')
3550 *** `directory-sep-char' (== ?/)
3551 *** `font-lock-defaults-alist' (`font-lock-defaults')
3552 *** `e' (`float-e').
3554 ** The following obsolete files were removed:
3555 sc.el, x-menu.el, rnews.el, rnewspost.el
3557 ** The format of the finder-inf.el file has changed, since the Finder
3558 mechanism is now based on the package system. The variable
3559 `finder-package-info' is replaced by `package--builtins' and
3560 `finder-keywords-hash'.
3562 ** When generating autoloads, `update-directory-autoloads' no longer
3563 assumes every inspected file is in your `load-path'. It instead
3564 generates relative names according to the current `load-path'.
3567 * Lisp Changes in Emacs 24.1
3569 ** Code can now use lexical scoping by default instead of dynamic scoping.
3570 The `lexical-binding' variable enables lexical scoping for local
3571 variables. It is typically set via a file-local variable in the first
3572 line of the file, in which case it applies to all the code in that
3575 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3576 binding instead of the old dynamic binding mode.
3578 *** Lexically scoped interpreted functions are represented with a new form
3579 of function value which looks like (closure ENV ARGS &rest BODY).
3581 *** New macro `letrec' to define recursive local functions.
3583 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3584 So do `defcustom' and other forms that call `defvar' as a subroutine.
3586 *** New function `special-variable-p' to check whether a variable is
3587 declared as dynamically bound.
3589 *** The form ((lambda ...) ...) is deprecated.
3591 ** An Emacs Lisp testing tool is now included.
3592 Emacs Lisp developers can use this tool to write automated tests for
3593 their code. See the ERT info manual for details.
3595 ** Changes for bidirectional display and editing
3597 *** New function `current-bidi-paragraph-direction'.
3598 This returns the base direction of the paragraph at point.
3600 *** New function `bidi-string-mark-left-to-right'.
3601 Given a string containing characters from right-to-left scripts, this
3602 function returns another string which can be safely inserted into a
3603 buffer, such that any following text will be always displayed to the
3604 right of that string. (This works by appending an invisible Unicode
3605 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3607 This is useful when the buffer has overall left-to-right paragraph
3608 direction and you need to insert a string whose contents are not known
3609 in advance, without disrupting the layout of the line.
3613 *** Window tree functions are accessible in Elisp.
3614 Functions are provided to return the parent, siblings or child windows
3615 of any window including internal windows (windows not associated with a
3616 buffer) in the window tree.
3618 **** New function `window-valid-p' gives non-nil for live and internal
3621 **** Window manipulation can deal with internal windows.
3622 Many window handling functions like `split-window', `delete-window', or
3623 `delete-other-windows' as well as the window resizing functions can now
3624 act on any window including internal ones.
3626 *** window-total-height/-width vs window-body-height/-width.
3627 The function `window-height' has been renamed to `window-total-height'
3628 and `window-width' has been renamed to `window-body-width'. The old
3629 names are provided as aliases. Two new functions `window-total-width'
3630 and `window-body-height' are provided.
3632 *** Window parameters specific to window handling functions.
3633 For each window you can specify a parameter to override the default
3634 behavior of a number of functions like `split-window', `delete-window'
3635 and `delete-other-windows'. The variable `ignore-window-parameters'
3636 allows to ignore processing such parameters.
3638 *** New semantics of third argument of `split-window'.
3639 The third argument of `split-window' has been renamed to SIDE and can be
3640 set to any of the values 'below, 'right, 'above, or 'left to make the
3641 new window appear on the corresponding side of the window that shall be
3642 split. Any other value of SIDE will cause `split-window' to split the
3643 window into two side-by-side windows as before.
3645 *** Window resizing functions.
3646 A new standard function for resizing windows called `window-resize' has
3647 been introduced. This and all other functions for resizing windows no
3648 longer delete any windows when they become too small.
3650 *** Deleting the selected window now selects the most recently selected
3651 live window on that frame instead.
3653 *** `adjust-window-trailing-edge' adjustments.
3654 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3655 is able to resize other windows if a window adjacent to the trailing
3656 edge cannot be shrunk any more. This makes its behavior more similar to
3657 that of Emacs 21 without compromising, however, its inability to delete
3658 windows which was introduced in Emacs 22.
3660 *** Window-local buffer lists.
3661 Windows now have local buffer lists. This means that removing a buffer
3662 from display in a window will preferably show the buffer previously
3663 shown in that window with its previous window-start and window-point
3664 positions. This also means that the same buffer may be automatically
3665 shown twice even if it already appears in another window.
3667 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3668 which if non-nil requires the buffer to be displayed in the currently
3669 selected window, signaling an error otherwise. If nil, another window
3670 can be used, e.g. if the selected one is strongly dedicated.
3672 *** `split-window-vertically' and `split-window-horizontally' renamed
3673 to `split-window-below' and `split-window-right' respectively.
3674 The old names are kept as aliases.
3678 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3679 named ACTION, and takes a display action of the same form as
3680 `display-buffer-base-action' (see Changes, above). A non-nil,
3681 non-list value is treated specially, as the old meaning.
3683 **** New variable `display-buffer-overriding-action'.
3685 **** The procedure of `display-buffer' etc. to choose a window is
3686 determined by combining `display-buffer-overriding-action',
3687 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3688 and `display-buffer-fallback-action'. The second and fourth of these
3689 are user-customizable variables.
3691 See the docstring of `display-buffer' for details.
3693 *** New functions `window-state-get' and `window-state-put'.
3694 These functions allow to save and restore the state of an arbitrary
3695 frame or window as an Elisp object.
3699 *** New variable `completion-extra-properties' used to specify extra
3700 properties of the current completion:
3701 - :annotate-function, same as the old completion-annotate-function.
3702 - :exit-function, function to call after completion took place.
3704 *** Functions on `completion-at-point-functions' can return any of the
3705 properties valid for `completion-extra-properties'.
3707 *** `completion-annotate-function' is obsolete.
3709 *** New `metadata' method for completion tables. The metadata thus returned
3710 can specify various details of the data returned by `all-completions':
3711 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3712 used to select a style in completion-category-overrides.
3713 - `annotation-function' to add annotations in *Completions*.
3714 - `display-sort-function' to specify how to sort entries in *Completions*.
3715 - `cycle-sort-function' to specify how to sort entries when cycling.
3717 *** `minibuffer-local-filename-must-match-map' is not used any more.
3718 Instead, the bindings in `minibuffer-local-filename-completion-map'
3719 are combined with `minibuffer-local-must-match-map'.
3721 *** New variable `completing-read-function' allows overriding the
3722 behavior of `completing-read'.
3724 ** `glyphless-char-display' can now distinguish between graphical and
3725 text terminal display, via a char-table entry that is a cons cell.
3727 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3728 Instead, the offending function is removed.
3732 *** New function `run-hook-wrapped' for running an abnormal hook by
3733 passing the hook functions as arguments to a "wrapping" function.
3734 Like `run-hook-with-args-until-success', it stops at the first
3735 non-nil return value.
3737 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3738 set of "wrapping" filters, similar to around advice.
3739 (A version of this macro was actually added in Emacs 23.2 but was not
3740 advertised at the time.)
3744 *** New macro `condition-case-unless-debug' (this was actually added in
3745 Emacs 23.1 as condition-case-no-debug, but not advertised)
3747 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3749 *** Variable `stack-trace-on-error' removed.
3751 *** The debugger can now "continue" from an error, which means it will
3752 jump to the error handler as if the debugger had not been invoked
3753 instead of jumping all the way to the top-level.
3755 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3756 This can be useful when `inhibit-quit' is set.
3758 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3759 named Emacs server instances.
3761 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3762 to redirect STDOUT to a file.
3764 ** The function `format-time-string' now supports the %N directive,
3765 for higher-resolution time stamps.
3767 ** New input reading functions
3769 *** New function `read-char-choice' reads a restricted set of
3770 characters, discarding any inputs not inside the set.
3772 *** The command `read-color' now requires a match for a color name
3773 or RGB triplet, instead of signaling an error if the user provides
3776 **** `facemenu-read-color' is now an alias for `read-color'.
3778 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3779 The variable is now used to load all kind of supported dynamic libraries,
3780 not just image libraries. The previous name is still available as an
3783 ** Syntax parsing changes
3785 *** New variable `syntax-propertize-function'.
3786 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3787 This allows syntax-table properties to be set independently from font-lock:
3788 just call syntax-propertize to make sure the text is propertized.
3789 Together with this new variable come a new hook
3790 syntax-propertize-extend-region-functions, as well as two helper functions:
3791 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3792 as-is; and syntax-propertize-rules which provides a new way to specify
3795 *** Syntax tables support a new "comment style c" additionally to style b.
3797 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3799 ** frame-local variables cannot be let-bound any more.
3801 ** Major and minor mode changes
3803 *** `set-auto-mode' now respects mode: local variables at the end of files,
3804 as well as those in the -*- line.
3806 *** `prog-mode' is a new major mode from which programming modes
3809 **** `prog-mode-hook' can be used to enable features for programming
3810 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3811 on-the-fly spell checking for comments and strings.
3813 *** New hook `change-major-mode-after-body-hook', run by
3814 `run-mode-hooks' just before any other mode hooks.
3816 *** Enabled globalized minor modes can be disabled in specific major modes.
3817 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3818 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3820 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3822 ** File-handling changes
3824 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3825 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3826 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3827 argument is supplied (see Trash changes, above).
3829 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3831 ** Tool-bars can display separators.
3832 Tool-bar separators are handled like menu separators in menu-bar maps,
3833 i.e. via menu entries of the form `(menu-item "--")'.
3837 *** Animated images support (currently animated gifs only).
3839 **** `image-animated-p' returns non-nil if an image can be animated.
3841 **** `image-animate' animates a supplied image spec.
3843 **** `image-animate-timer' returns the timer object for an image that
3846 *** `image-extension-data' has been renamed to `image-metadata'.
3847 The old name is an obsolete alias to the new one.
3849 *** Image mode can view any image type that ImageMagick supports.
3850 This requires Emacs to be built with ImageMagick support.
3852 **** New function `imagemagick-types', defined if ImageMagick support
3853 is enabled, returns a list of image file extensions that your
3854 ImageMagick installation supports.
3856 **** New function `imagemagick-register-types' enables ImageMagick
3857 image types in Image mode and in `create-image' and other helper
3860 **** New option `imagemagick-types-inhibit' excludes certain
3861 ImageMagick image types from `imagemagick-register-types'.
3863 **** With ImageMagick support, there are extra Image mode commands to
3864 resize and rotate images: `image-transform-fit-to-height',
3865 `image-transform-fit-to-width', `image-transform-set-rotation', and
3866 `image-transform-set-scale'.
3868 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3869 passes it to the mail user agent function. This argument specifies an
3870 action for returning to the caller after finishing with the mail. For
3871 example, this is used by Rmail to optionally delete a mail window.
3873 ** XML and HTML parsing
3874 If Emacs is compiled with libxml2 support, there are two new
3875 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3876 and `libxml-parse-xml-region' (which parses XML). Both return an
3877 Emacs Lisp parse tree.
3879 ** Networking and encryption changes
3881 *** `open-network-stream' can now be used to open an encrypted stream.
3882 It now accepts an optional `:type' parameter for initiating a TLS
3883 connection, directly or via STARTTLS. To do STARTTLS, additional
3884 parameters (`:end-of-command', `:success', `:capabilities-command')
3885 must also be supplied.
3887 *** New library gnutls.el.
3888 The new function `gnutls-available-p' returns non-nil if Emacs is
3889 built with GnuTLS support. The main entry points are
3890 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3891 these functions through `open-network-stream', because that can
3892 upgrade connections through STARTTLS opportunistically or use plain
3893 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3896 *** New primitive `secure-hash' that supports many secure hash algorithms:
3897 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3898 sha1.el has been removed. The `sha1' feature is provided by default.
3902 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3904 ** Progress reporters can now "spin".
3905 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3906 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3907 time you call `progress-reporter-update' on that progress reporter,
3908 with a nil or omitted VALUE argument, the reporter message is
3909 displayed with a "spinning bar".
3911 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3912 being reverted, even if the buffer has a local `revert-buffer-function'.
3914 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3915 If delayed-warnings-list is non-nil, the command loop calls
3916 `delayed-warnings-hook' after `post-command-hook'. At present, this
3917 is only used by Emacs on some platforms to display warnings during
3918 startup, which might otherwise not be noticed. This uses the
3919 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3921 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3923 ** New function `make-composed-keymap' that constructs a new keymap
3924 from multiple input maps. You can use this to make a keymap that
3925 inherits from multiple maps, eg:
3926 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3928 ** New function `string-prefix-p'.
3929 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3931 ** New reader macro ## that stands for the empty symbol.
3932 This means that the empty symbol can now be read back. Also, #: by itself
3933 (when not immediately followed by a possible symbol character) stands for
3934 an empty uninterned symbol.
3936 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3938 ** The following functions and variables are obsolete:
3940 *** `tooltip-use-echo-area' is obsolete.
3941 Rather than setting this to t, disable Tooltip mode instead.
3943 *** buffer-substring-filters is obsolete.
3944 Use `filter-buffer-substring-functions' instead.
3946 *** `byte-compile-disable-print-circle' is obsolete.
3948 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3949 Use `post-command-hook' instead.
3951 *** `font-lock-maximum-size' is obsolete.
3954 * Changes in Emacs 24.1 on Non-Free Operating Systems
3956 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3957 and also when HOME is set to C:\ by default.
3959 ** New configure.bat options
3961 *** --enable-checking builds Emacs with extra runtime checks.
3963 *** --distfiles specifies files to be included in binary distribution.
3965 *** --without-gnutls disables automatic GnuTLS detection.
3967 *** --lib for general library linkage, works with the USER_LIBS build variable.
3969 ** New make target `dist' to create binary distribution for MS Windows.
3971 ** The Lisp function `w32-default-color-map' is now obsolete.
3972 (It is only used internally in the Emacs C code.)
3974 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3975 reappear on mouse-over. (Requires OS X 10.6 or later.)
3977 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3978 other platforms, rather than inserting its contents into the buffer.
3981 ----------------------------------------------------------------------
3982 This file is part of GNU Emacs.
3984 GNU Emacs is free software: you can redistribute it and/or modify
3985 it under the terms of the GNU General Public License as published by
3986 the Free Software Foundation, either version 3 of the License, or
3987 (at your option) any later version.
3989 GNU Emacs is distributed in the hope that it will be useful,
3990 but WITHOUT ANY WARRANTY; without even the implied warranty of
3991 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3992 GNU General Public License for more details.
3994 You should have received a copy of the GNU General Public License
3995 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
4000 paragraph-separate: "[
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