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.
146 *** The functions `display-pixel-width' and `display-pixel-height' now
147 behave consistently among the platforms: they return the pixel width
148 or height for all physical monitors associated with the given display
149 as if they were on X. To get information for each physical
150 monitor, use the new functions above. Similar notes also apply to
151 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
152 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
155 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
156 You can change the default by customizing `blink-cursor-blinks'.
159 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
160 This affects View mode, etc.
165 *** The command `apropos-variable' is renamed to `apropos-user-option'.
166 `apropos-user-option' shows all user options while `apropos-variable'
167 shows all variables. When called with a universal prefix argument,
168 the two commands swap their behaviors. When `apropos-do-all' is
169 non-nil, they output the same results.
172 *** The key `?' now describes prefix bindings, like `C-h'.
175 *** The command `describe-function' has been extended for EIEIO.
176 Running it on constructors will show a full description of the
177 generated class. For generic functions, it will show all
178 implementations together with links to the source. The old commands
179 `describe-class', `describe-constructor' and `describe-generic' were
183 *** The function `quail-help' is no longer an interactive command.
184 Use `C-h C-\' (`describe-input-method') instead.
189 *** ImageMagick images now support the :max-width and :max-height keywords.
192 *** When using `create-image' with image data, you can pass a :format
193 attribute (via the property-list argument) in order to help
194 ImageMagick detect the image type. The value should be a MIME
195 content-type that is found in the new variable `image-format-suffixes'.
197 ** Frame and window changes
200 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
201 bound to <f11> and M-<f10>, respectively.
204 *** New hooks `focus-in-hook', `focus-out-hook'.
205 These are normal hooks run when an Emacs frame gains or loses input focus.
207 *** Emacs can now change frame sizes in units of pixels, rather than
208 text rows or columns. When maximizing a frame or making it fullscreen,
209 remaining extra pixels are no longer given to the minibuffer, the rightmost
210 fringe, or other unusable space, but are distributed among the text
211 areas of the frame's windows. If the new option `frame-resize-pixelwise'
212 is non-nil, all frame size changes happen pixelwise and set the
213 corresponding size hints for the window manager.
215 *** Emacs can now change window sizes in units of pixels.
216 Mouse-dragging a mode line or window divider now changes the size of
217 adjacent windows pixelwise. If the new option `window-resize-pixelwise'
218 is non-nil, functions like `balance-windows-area' and `fit-window-to-buffer'
219 resize windows pixelwise. Most functions for changing or accessing
220 window sizes now have an additional argument that allows changes to apply,
221 or values to be returned, in pixels instead of lines/columns.
223 *** Emacs can now draw dividers between adjacent windows. To put
224 dividers between side-by-side/vertically stacked windows customize the
225 frame parameters `right-divider-width' and `bottom-divider-width' to
226 some positive integer. You can drag dividers with the mouse (they show
227 a corresponding cursor when the mouse hovers over them). You can change
228 the appearance of dividers by customizing the faces `window-divider',
229 `window-divider-first-pixel', and `window-divider-last-pixel'. The last
230 two are useful to provide a 3D effect, or to better distinguish dividers
231 from surrounding display objects.
233 *** New functions are provided to return the pixel sizes of window
234 components, namely `window-scroll-bar-width', `window-mode-line-height'
235 `window-header-line-height', `window-right-divider-width' and
236 `window-bottom-divider-width'.
238 *** The new function `window-text-pixel-size' returns the size of the
239 text of a window's buffer in pixels. This allows functions like
240 `fit-frame-to-buffer' and `fit-window-to-buffer' to accurately fit a
241 window to its buffer as it will be displayed.
243 *** `fit-window-to-buffer' can now resize windows horizontally.
244 This behavior is controlled by the new option
245 `fit-window-to-buffer-horizontally'.
247 *** `fit-frame-to-buffer' can now fit frames in both directions.
248 This behavior is controlled by the option `fit-frame-to-buffer' which
249 tells in which direction(s) the frame shall be fit. The new options
250 `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes' allow to
251 control the size of the frame and its position on screen.
253 *** Temp Buffer Resize Mode can now adjust height and width of windows
254 and frames. `temp-buffer-resize-mode' is now able to adjust the height
255 and the width of a window displaying a temporary buffer. The new option
256 `temp-buffer-max-width' allows to control the width of temporary buffer
257 windows. Moreover, if the new option `fit-frame-to-buffer' is non-nil
258 and the buffer appears in the root window of a frame, Temp Buffer Resize
259 Mode will try to adjust width and/or height of the frame.
262 *** `split-window' is now a non-interactive function, not a command.
263 As a command, it was a special case of `C-x 2' (`split-window-below'),
264 and as such superfluous. After being reimplemented in Lisp, its
265 interactive form was mistakenly retained.
268 *** The functions `window-size' and `window-total-size' now have an
269 optional argument to return a rounded size value.
272 *** `window-state-put' now allows to put a window state into internal
276 *** New option `scroll-bar-adjust-thumb-portion'.
277 Available only on X, this option allows to control over-scrolling
278 using the scroll bar (i.e. dragging the thumb down even when the end
279 of the buffer is visible).
282 *** New basic action function `display-buffer-in-previous-window' has
283 `display-buffer' display a buffer in a window previously showing that
287 *** New basic action function `display-buffer-at-bottom' has
288 `display-buffer' choose or make a window at the bottom of the selected
291 *** New display action function `display-buffer-no-window' to not
292 display the buffer in a window.
294 *** New display action alist entry `allow-no-window' to indicate the
295 caller of `display-buffer' is ready to handle the case of not
296 displaying the buffer in a window.
298 ** Lisp evaluation changes
300 *** `eval-defun' on an already defined defcustom calls the :set function,
304 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
305 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
306 zero prefix argument. This disables truncation of lists in the output,
307 equivalent to setting `(eval-expression-)print-length' and
308 `(eval-expression-)print-level' to nil. Additionally, it causes integers
309 to be printed in other formats (octal, hexadecimal, and character).
312 *** New hook `eval-expression-minibuffer-setup-hook' run by
313 `eval-expression' on entering the minibuffer.
316 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
319 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
320 because it affects caching of paragraph scanning results as well.
321 There is no reason to set this to nil except for debugging purposes.
324 ** The option `set-mark-default-inactive' has been deleted.
325 This unfinished feature was introduced by accident in Emacs 23.1;
326 simply disabling Transient Mark mode does the same thing.
329 ** The default value of `comment-use-global-state' is now t,
330 and this variable has been marked obsolete.
333 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
334 and works for git too, if you fetch the repository notes.
337 ** New option `load-prefer-newer' affects how the `load' function chooses
338 the file to load. If this is non-nil, then when both .el and .elc
339 versions of a file exist, and the caller did not explicitly specify
340 which one to load, then the newer file is loaded. The default, nil,
341 means to always load the .elc file.
344 * Editing Changes in Emacs 24.4
346 ** Indentation changes
349 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
350 When invoked without a prefix argument, it now activates a transient
351 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
352 the text indentation in the region. Typing any other key resumes
353 normal editing behavior.
355 *** `electric-indent-mode' is enabled by default.
358 *** `tab-stop-list' is now implicitly extended to infinity by repeating
359 the last step. Its default value is changed to nil, which means a tab
360 stop every `tab-width' columns.
363 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
364 When called in succession, it cycles between spacing conventions:
365 one space, no spaces, original spacing.
368 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
369 a line after a one-letter word, which is an error in some typographical
370 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
373 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
376 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
377 Most commands are still unaware of it, but kill/yank do work on the rectangle.
380 ** New option `visual-order-cursor-movement'.
381 If this is non-nil, cursor motion with arrow keys will follow the
382 visual order of characters on the screen: <left> always moves to the
383 left, <right> always moves to the right, disregarding the surrounding
384 bidirectional context.
389 *** All interactive commands that read a register (`copy-to-register', etc.)
390 now display a temporary window after `register-preview-delay' seconds
391 that summarizes existing registers. To disable this, set that option to nil.
392 Interactive commands that read registers and want to make use of this
393 should use `register-read-with-preview' to read register names.
396 *** New command `frameset-to-register' bound to `C-x r f', replacing
397 `frame-configuration-to-register'. It offers similar functionality,
398 plus enhancements like the ability to restore deleted frames.
399 (`frame-configuration-to-register' still exists, but no longer has a
403 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
407 ** New command `delete-duplicate-lines'.
408 This searches the region for identical lines, and removes all but one
409 copy of each repeated line. The lines need not be sorted.
412 * Changes in Specialized Modes and Packages in Emacs 24.4
415 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
417 ~/.emacs.d/timelog replaces ~/.timelog
418 ~/.emacs.d/vip replaces ~/.vip
419 ~/.emacs.d/viper replaces ~/.viper
420 ~/.emacs.d/ido.last replaces ~/.ido.last
421 ~/.emacs.d/kkcrc replaces ~/.kkcrc
422 ~/.emacs.d/quickurls replaces ~/.quickurls
423 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
424 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
425 ~/.emacs.d/places replaces ~/.emacs-places
426 ~/.emacs.d/shadows replaces ~/.shadows
427 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
428 ~/.emacs.d/strokes replaces ~/.strokes
429 ~/.emacs.d/notes replaces ~/.notes
430 ~/.emacs.d/type-break replaces ~/.type-break
431 Also the following files used by the now obsolete otodo-mode.el:
432 ~/.emacs.d/todo-do replaces ~/.todo-do
433 ~/.emacs.d/todo-done replaces ~/.todo-done
434 ~/.emacs.d/todo-top replaces ~/.todo-top
436 ** Backtrace and debugger
439 *** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
440 display of local variables of the current stack frame.
443 *** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
444 the lexical environment when evaluating the code in the context at point
445 (and so allows you to access lexical variables).
448 *** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
451 ** Battery information can now be retrieved from BSD's `apm' utility.
454 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
456 ** Calendar and Diary
459 *** New faces `calendar-weekday-header', `calendar-weekend-header',
460 and `calendar-month-header'.
463 *** New option `calendar-day-header-array'.
466 *** New variable `diary-from-outlook-function', used by the command
467 `diary-from-outlook'.
470 *** The variable `calendar-font-lock-keywords' is obsolete.
475 *** Calc by default now uses the Gregorian calendar for all dates, and
476 uses January 1, 1 AD as its day number 1. Previously Calc used the
477 Julian calendar for dates before September 14, 1752, and it used
478 December 31, 1 BC as its day number 1; the new scheme is more
479 consistent with Calendar's calendrical system and day numbering.
482 *** The new option `calc-gregorian-switch' lets you configure if
483 (and when) Calc switches from the Julian to the Gregorian calendar.
486 *** Support for ISO 8601 dates.
492 **** The cpp-root project now supports executing a compile command.
493 It can be set through the new :compile-command slot or the
494 buffer-local variable `compile-command'.
496 **** Better selection of include directories for the 'linux' project.
497 Include directories now support out-of-tree build directories and
498 target architecture auto-detection.
502 **** Improved detection of used namespaces in current scope in C++.
504 **** Parsing of default values for variables and function arguments in C/C++.
505 They are also displayed by the summarize feature in the mode line.
507 **** Improved parsing of function pointers in C/C++.
508 This also includes parsing of function pointers as function arguments.
510 **** Parsing of C/C++ preprocessor macros that open new scope.
511 For example, this enables parsing of macros that open new namespaces.
513 **** Support for 'this' pointer in inline member functions in C++.
518 *** New macro `cl-tagbody'.
519 This executes statements while allowing for control transfer to labels.
522 *** letf is now just an alias for cl-letf.
527 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
528 Hence, you can now enable it independently from those modes, and from
529 `transient-mark-mode'.
532 *** `cua-highlight-region-shift-only' is now obsolete.
533 You can disable `transient-mark-mode' to get the same result.
536 *** CUA's rectangles can now be used without CUA by calling the command
537 `cua-rectangle-mark-mode'.
542 *** Support for completion, ElDoc, and Flycheck has been added.
545 *** The current CFEngine syntax is parsed from "cf-promises -s json".
546 There is a fallback syntax available if you don't have cf-promises or
547 if your version doesn't support that option. See option `cfengine-cf-promises'.
550 ** Delete Selection mode can now be used without Transient Mark mode.
555 *** `desktop-save-mode' by default now auto-saves an existing desktop file
556 after `desktop-auto-save-timeout'. To disable this, customize that option
560 *** `desktop-restore-frames', enabled by default, allows saving and
561 restoring the frame/window configuration (frameset). Additional options
562 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
563 and `desktop-restore-forces-onscreen' offer further customization.
566 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
567 such as file ownership or permissions, are visible.
570 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
571 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
572 The results display in the mode line.
574 ** Electric Pair mode
577 *** New option `electric-pair-preserve-balance', enabled by default.
578 If non-nil, pairing/skipping only kicks in when that help the balance
579 of parentheses and quotes, i.e. the buffer should end up at least as
582 You can further control this behavior by adjusting the predicates
583 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
586 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
587 In `electric-pair-mode', the commands `backward-delete-char' and
588 `backward-delete-char-untabify' are now bound to electric variants
589 that delete the closer when invoked between adjacent pairs.
592 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
593 In `electric-pair-mode', inserting a newline between adjacent pairs
594 opens an extra newline after point, which is indented if
595 `electric-indent-mode' is also set.
598 *** New option `electric-pair-skip-whitespace', enabled by default.
599 This controls if skipping over closing delimiters should jump over any
600 whitespace slack. Setting it to `chomp' makes it delete this
601 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
604 *** New variables control the pairing in strings and comments.
605 You can customize `electric-pair-text-pairs' and
606 `electric-pair-text-syntax-table' to tweak pairing behavior inside
607 strings and comments.
610 ** New EPA option `epa-mail-aliases'.
611 You can set this to a list of email address aliases that `epa-mail-encrypt'
612 should use to find keys.
615 ** New ERC option `erc-accidental-paste-threshold-seconds'.
616 If set to a number, this can be used to avoid accidentally pasting large
617 amounts of data into the ERC input.
620 ** New ERT macro `skip-unless' allows skipping ERT tests.
621 See the ERT manual for details.
626 *** `eshell' now supports visual subcommands and options.
627 Eshell has been able to handle "visual" commands (interactive,
628 non-line oriented commands such as top that require display
629 capabilities not provided by eshell) by running them in an Emacs
630 terminal emulator. See `eshell-visual-commands'.
632 This feature has been extended to subcommands and options that make a
633 usually line-oriented command a visual command. Typical examples are
634 "git log" and "git <command> --help", which display their output in a
635 pager by default. See `eshell-visual-subcommands' and
636 `eshell-visual-options'.
639 *** New Eshell-Tramp module.
640 External su and sudo commands are now the default; the internal,
641 Tramp-using variants can still be used by enabling the eshell-tramp
645 ** New F90 mode option `f90-smart-end-names'.
648 Icomplete is now more similar to Ido.
651 *** Icomplete by default now applies to all forms of minibuffer completion.
652 The variable `icomplete-with-completion-tables' (now a user option)
653 controls this. To restore the old behavior, set it back to
654 '(internal-complete-buffer).
657 *** You can navigate through and select completions using the keys
658 from `icomplete-minibuffer-map'.
661 *** The string that separates potential completions is now a customizable
662 option (`icomplete-separator'). The default is " | " rather than ",".
665 *** New face `icomplete-first-match'; and new options
666 `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
669 *** The option `icomplete-show-key-bindings' has been removed.
674 *** An Ido user manual is now included.
677 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
678 This means to use virtual buffers if the current ido input does not match
682 *** The variable `ido-decorations' can optionally have two new elements,
683 which are the brackets to use around the sole remaining completion.
688 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
689 visit the next image file and the previous image file in the same
690 directory, respectively.
693 *** New commands to show specific frames of multi-frame images.
694 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
695 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
698 *** New commands to speed up, slow down, or reverse animation.
699 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
700 speed up and slow down the animation. `a r' (`image-reverse-speed')
701 to reverse it and `a 0' (`image-reset-speed') to reset it.
704 *** The command `image-mode-fit-frame' deletes other windows.
705 When toggling, it restores the frame's previous window configuration.
706 It also has an optional frame argument, which can be used by Lisp
707 callers to fit the image to a frame other than the selected frame.
712 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
713 the symbol found near point.
716 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
717 will cycle through faces in `hi-lock-face-defaults' without prompting.
720 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
725 *** New Info face `info-index-match', used to highlight matches in index
726 entries displayed by `Info-index-next', `Info-virtual-index' and
730 *** The Info-edit command is obsolete. Editing Info nodes by hand
731 has not been relevant for some time.
736 *** New option `js-switch-indent-offset'.
739 *** Better indentation of multiple-variable declarations.
740 If a declaration spans several lines, variables on the following lines
741 are lined up to the first one.
744 *** Recognition and better indentation of continuations in array comprehensions.
747 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
752 *** Font locking for Texinfo comments and new keywords.
754 *** Completion in Octave file buffers.
758 *** Jump to definition.
760 *** Documentation lookup/search.
763 ** OPascal mode is the new name for Delphi mode
766 *** All delphi-* variables and functions have been renamed to opascal-*.
767 Obsolete aliases exist for those likely to have been used externally.
770 *** The option `delphi-newline-always-indents' has been removed.
771 Use `electric-indent-mode' instead.
774 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
779 *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
780 to filter the list of packages by a keyword.
783 *** In the `describe-package' buffer, there are now buttons listing the
784 keywords related to the package. Click on a button to see other packages
785 related to that keyword.
788 *** The format of `archive-contents' files, generated by package
789 repositories, has changed to allow a new (fifth) element in the data
790 vectors, containing an associative list with extra properties.
791 (For example, `describe-package' uses the `:url' extra property to
792 display a "Homepage" header.)
795 ** In Prolog mode, `prolog-use-smie' has been removed,
796 along with the non-SMIE indentation code.
801 *** The new command `remember-notes' creates a buffer that is saved on exit.
802 You can use it as a more permanent *scratch* buffer.
805 *** Remember can now store notes in separate files.
806 To use this, add `remember-store-in-files' to the `remember-handler-functions'
807 option. The files are saved in `remember-data-directory' using
808 names specified by `remember-directory-file-name-format'.
813 *** Customize `rmail-mbox-format' to influence some minor aspects of
814 how Rmail displays non-MIME messages.
817 *** The `unrmail' command now converts from BABYL to mboxrd format,
818 rather than mboxo. Customize `unrmail-mbox-format' to change this.
823 *** Improved syntax highlighting and indentation.
826 *** New `electric-indent-mode' integration.
829 *** New option `ruby-encoding-magic-comment-style'.
832 *** New option `ruby-custom-encoding-magic-comment-template'.
835 *** New option `ruby-align-to-stmt-keywords'.
838 *** New option `ruby-align-chained-calls'.
841 *** More Ruby file types have been added to `auto-mode-alist'.
843 ** Search and Replace
846 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
847 starts a symbol (identifier) incremental search forward with the
848 symbol found near point added to the search string initially.
851 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
852 and adds it to the search string.
855 *** `M-s i' in Isearch mode toggles whether search matches invisible text.
858 *** `query-replace' skips invisible text when `search-invisible' is nil,
859 and opens overlays with hidden text when `search-invisible' is `open'.
862 *** A negative prefix arg of replacement commands replaces backward.
863 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
864 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
867 *** By default, prefix arguments do not now terminate Isearch mode.
868 Set `isearch-allow-prefix' to nil to restore old behavior.
871 *** More Isearch commands accept prefix arguments, namely
872 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
876 *** Word search now matches whitespace at the beginning/end
877 of the search string if it contains leading/trailing whitespace.
878 In an incremental word search or when using a non-nil LAX argument
879 of `word-search-regexp', the lax matching can also match part of
880 the first word (in addition to the lax matching of the last word).
881 The same rules are now applied to the symbol search with the difference
882 that it matches symbols, and non-symbol characters between symbols.
885 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
888 ** The shell.el option `explicit-bash-args' includes --noediting by default.
889 All non-ancient Bash versions support this option.
894 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
897 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
899 ** SMIE indentation can be customized via `smie-config'.
900 Emacs can learn the appropriate indentation settings if you provide it
901 with an indented sample file.
906 *** Improved login monitoring and appropriate response to login failures.
907 New variable `sql-login-delay' defines maximum wait time for a connection.
910 SQL*Plus script placeholders are properly highlighted and identified
911 in `sql-placeholders-filter'. When starting SQL*Plus, `sql-oracle-options'
912 are passed before the logon parameter, as required. The default now
913 includes `-L', to limit the number of logon attempts per invocation.
916 ** New Term mode option `term-suppress-hard-newline'.
919 ** Todo mode has been rewritten and enhanced.
920 The Todo mode user manual describes all commands and most user
921 options. To support some of these features, a new file format is
922 used, which is incompatible with the old format; however, you can
923 convert old todo and done item files to the new format on initializing
924 the first new todo file, or at any later time with the provided
925 conversion command. The previous version of todo-mode.el has been
926 renamed to otodo-mode.el and is now obsolete. New features include:
928 *** Support for multiple todo files and archive files of done items.
930 *** Renaming, reordering, moving, merging, and deleting categories.
932 *** Sortable tabular summaries of categories and the item types they contain.
934 *** Cross-category lists of items filtered by specific criteria.
936 *** More fine-grained interaction with the Emacs diary, by being able to
937 decide for each todo item whether it appears in the Fancy Diary display.
939 *** Highly flexible new item insertion and item editing.
941 *** Moving items between categories, storing done items in their category
942 or in archive files, undoing or unarchiving done items.
944 *** Reprioritizing items by inputting a numerical priority.
946 *** Extensive customizability of operation and display, including many faces.
951 *** `trace-function' and `trace-function-background' no longer prompt for
952 the output buffer. Unless you use a prefix argument, they output to
956 *** With a prefix argument, `trace-function' and `trace-function-background'
957 will prompt for a "context". This is a Lisp expression, whose value at the
958 time the function is entered/exited is printed along with the function's
964 *** The experimental url syntax for remote file names has been removed.
967 *** New connection method "adb", which allows to access Android
968 devices by the Android Debug Bridge. The variable `tramp-adb-program'
969 can be used to adapt the path of the "adb" program, if needed.
972 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
973 "scpc" and "rsyncc" are discontinued. The ssh option
974 "ControlMaster=auto" is set automatically in all ssh-based methods,
975 when possible. See `tramp-use-ssh-controlmaster-options'.
978 *** Handlers for `file-acl' and `set-file-acl' for remote machines
979 which support POSIX ACLs.
982 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
983 for remote machines which support filesystem notifications.
986 ** New URL command `url-cookie-list' displays the current cookies,
987 and allows you to interactively remove cookies.
989 ** VC and related modes
992 *** In VC directory mode, `D' displays diffs between VC-controlled
993 whole tree revisions.
996 *** In VC directory mode, `L' lists the change log for the current VC
997 controlled tree in a window.
1000 *** In VC directory mode, `I' shows a log of changes that will be
1001 received with a pull operation.
1004 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
1005 under current version control system. When called with a prefix
1006 argument, you can remove a file from the ignored file list.
1011 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
1014 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
1017 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
1018 are obsolete. Customize the `woman-*' faces instead.
1020 ** Obsolete packages
1023 *** iswitchb.el; use icomplete-mode.
1026 *** longlines.el; use visual-line-mode.
1035 *** terminal.el; use term.el instead.
1038 *** the old version of todo-mode.el (renamed to otodo-mode.el).
1041 *** xesam.el (owing to the cancellation of the XESAM project).
1044 *** yow.el; use fortune.el or cookie1.el instead.
1047 * New Modes and Packages in Emacs 24.4
1050 ** New package `eww' is a built-in web browser.
1051 It is only available if Emacs is compiled with libxml2 support.
1054 ** New minor mode `superword-mode'.
1055 This overrides the default word motion commands to treat "symbol_words"
1056 as a single word, similar to what `subword-mode' does.
1059 ** New package nadvice.el offers lighter-weight advice facilities.
1062 *** add-function/remove-function, which can be used to add/remove code on any
1063 function-carrying place, such as process-filters or `<foo>-function' hooks.
1065 *** advice-add/advice-remove to add/remove a piece of advice on a named
1066 function, much like `defadvice' does.
1068 ** New package frameset.el.
1069 It provides a set of operations to save a frameset (the state of all
1070 or a subset of the existing frames and windows, somewhat similar to a
1071 frame configuration), both in-session and persistently, and restore it
1072 at some point in the future.
1075 ** New package filenotify.el provides an interface for file system
1076 notifications. It requires that Emacs be compiled with one of the
1077 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
1080 * Incompatible Lisp Changes in Emacs 24.4
1083 ** `kill-region' has lost its `yank-handler' optional argument.
1086 ** `(input-pending-p)' no longer runs other timers that are ready to run.
1087 The new optional CHECK-TIMERS parameter allows for the prior behavior.
1090 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
1093 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
1094 Some languages match those as »...«, and others as «...», so it is
1095 better for Emacs to stay neutral by default.
1098 ** In compiled Lisp files, the header no longer includes a timestamp.
1101 ** The default file coding for Emacs Lisp files is now utf-8.
1102 (See `file-coding-system-alist'.) In most cases, this change is
1103 transparent, but files that contain unusual characters without
1104 specifying an explicit coding system may fail to load with obscure
1105 errors. You should either convert them to utf-8 or add an explicit
1109 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
1110 It used to disable the minor mode, major mode, and text-property keymaps,
1111 whereas now it simply has higher precedence.
1114 ** Default process filters and sentinels are not nil any more.
1115 Instead they default to a function that does what the nil value used to do.
1118 ** `read-event' does not return decoded chars in ttys any more.
1119 As was the case in Emacs 22 and before, the decoding of terminal
1120 input, according to `keyboard-coding-system', is not performed in
1121 `read-event' any more. But unlike in Emacs 22, this decoding is still
1122 done before input-decode-map, function-key-map, etc.
1125 ** The option `inhibit-local-menu-bar-menus' has been removed.
1128 ** Frame-local variables that affect redisplay do not work any more.
1129 More specifically, redisplay does not bother to check for a frame-local
1130 value when looking up variables.
1133 ** nil and "unbound" are indistinguishable in `symbol-function'.
1134 `symbol-function' does not signal a `void-function' error any more.
1135 To determine if a symbol's function definition is void, use `fboundp'.
1138 ** `defadvice' does not honor the `freeze' flag and cannot advise
1139 special-forms any more.
1142 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1143 when lexical binding is enabled. Previously, VAR was bound to nil,
1144 which often led to spurious unused-variable warnings.
1147 ** The return value of `backup-buffer' has changed.
1148 The second argument is no longer an SELinux context, instead it is an
1149 alist of extended attributes as returned by the new function
1150 `file-extended-attributes'. The attributes can be applied to another
1151 file using `set-file-extended-attributes'.
1154 ** By default `copy-file' no longer copies file permission bits to an
1155 existing destination; and it sets the file permission bits of a newly
1156 created destination to those of the source, masked by the default file
1157 permissions. To copy the file permission bits, pass t as the
1158 PRESERVE-PERMISSIONS argument of `copy-file'.
1161 ** `visited-file-modtime' now returns -1 for nonexistent files.
1162 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1163 in the presence of files with negative time stamps.
1166 ** The cars of the elements in `interpreter-mode-alist' are now
1167 treated as regexps rather than literal strings.
1170 * Lisp Changes in Emacs 24.4
1173 ** The second argument of `eval' can now specify a lexical environment.
1176 ** New functions `special-form-p' and `macrop'.
1179 ** New macro `define-alternatives' can be used to define generic commands.
1180 Generic commands are interactive functions whose implementation can be
1181 selected among several alternatives, as a matter of user preference.
1184 ** If you give a symbol a `defalias-fset-function' property, `defalias'
1185 on that symbol will use the associated value as a function to call
1189 ** New variable `enable-dir-local-variables'.
1190 Directory-local variables are ignored if this is nil. This may be
1191 useful for modes that want to ignore directory-locals while still
1192 respecting file-local variables.
1195 ** New function `get-pos-property'.
1198 ** `read-regexp' now uses the new variable `read-regexp-defaults-function'
1199 as a function to call to provide default values.
1201 ** Completion changes
1204 *** The separator used by `completing-read-multiple' is now a regexp.
1205 The default `crm-separator' has been changed to allow surrounding spaces
1209 *** The `common-substring' argument of `display-completion-list',
1210 which has been documented as obsolete since Emacs 23.1, is now _really_
1211 obsolete, and no longer advertised. Instead either call
1212 `completion-hilit-commonality' to add the highlighting; or use
1213 `completion-all-completions', which returns highlighted strings.
1216 *** New function `completion-table-with-cache' is a wrapper for
1217 `completion-table-dynamic' that caches the result of the last lookup.
1220 *** New function `completion-table-merge' to combine several
1221 completion tables by merging their completions.
1224 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1225 display specified symbols as composed characters. E.g., in Emacs Lisp mode,
1226 this replaces the string "lambda" with the Greek lambda character.
1231 *** Functions to pop up menus and dialogs now work on all terminals,
1232 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1233 `message-box', `yes-or-no-p', etc.
1235 The function `display-popup-menus-p' will now return non-nil for a
1236 display or frame whenever a mouse is supported on that display or
1240 *** New hook `tty-setup-hook', run at the end of initializing a text terminal.
1243 *** The hook `term-setup-hook' is obsolete. It is entirely equivalent
1244 to `emacs-startup-hook'. See also the new `tty-setup-hook'.
1247 ** New hook `pre-redisplay-function'.
1250 ** New bool-vector set operation functions
1251 *** `bool-vector-exclusive-or'
1252 *** `bool-vector-union'
1253 *** `bool-vector-intersection'
1254 *** `bool-vector-set-difference'
1255 *** `bool-vector-not'
1256 *** `bool-vector-subsetp'
1257 *** `bool-vector-count-consecutive'
1258 *** `bool-vector-count-population'
1261 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1263 ** Error-handling changes
1266 *** New function `define-error'.
1269 *** `with-demoted-errors' takes an additional argument `format'.
1272 ** New macro `with-eval-after-load'.
1273 This is like the old `eval-after-load', but better behaved.
1276 ** New library subr-x.el with miscellaneous small utility functions
1277 *** `hash-table-keys'
1278 *** `hash-table-values'
1279 *** `string-blank-p'
1280 *** `string-empty-p'
1282 *** `string-reverse'
1283 *** `string-trim-left'
1284 *** `string-trim-right'
1286 *** `string-remove-prefix'
1287 *** `string-remove-suffix'
1290 ** Obsoleted functions
1293 *** `lisp-complete-symbol'
1294 *** `field-complete'
1295 *** `minibuffer-completion-contents'
1296 *** `isearch-nonincremental-exit-minibuffer'
1297 *** `isearch-filter-visible'
1298 *** `generic-make-keywords-list'
1299 *** `get-upcase-table' (use `case-table-get-table' instead).
1302 ** `with-wrapper-hook' is obsoleted by `add-function'.
1303 The few hooks that used with-wrapper-hook are replaced as follows:
1304 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1305 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1306 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1309 ** `byte-compile-interactive-only-functions' is now obsolete.
1310 To specify that a command should only be called interactively, give it
1311 a non-nil `interactive-only' property.
1314 ** `split-string' now takes an optional argument TRIM.
1315 The value, if non-nil, is a regexp that specifies what to trim from
1316 the start and end of each substring.
1319 ** New function `string-suffix-p'.
1321 ** File-handling changes
1324 *** Support for filesystem notifications.
1325 Emacs now supports notifications of filesystem changes, such as
1326 creation, modification, and deletion of files. This requires the
1327 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1328 MS-Windows systems, this is supported for Windows XP and newer
1332 *** The 9th element returned by `file-attributes' is now unspecified.
1333 Formerly, it was t if the file's gid would change if file were deleted
1334 and recreated. This value has been inaccurate for years on many
1335 platforms, and nobody seems to have noticed or cared.
1338 *** The 6th argument to `copy-file' has been renamed to
1339 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1340 Unix file permission bits as well as SELinux context.
1343 *** The function `file-ownership-preserved-p' now has an optional
1344 argument GROUP which causes it check for file group too. This can be
1345 used in place of the 9th element of `file-attributes'.
1348 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1349 argument, with the same interpretation as the returned value of
1350 `visited-file-modtime'.
1352 ** Autorevert changes
1355 *** If Emacs is compiled with file notification support, notifications
1356 are used instead of checking the time stamp of the files. You can
1357 disable this by setting the user option `auto-revert-use-notify' to
1358 nil. Alternatively, a regular expression of directories to be
1359 excluded from file notifications can be specified by
1360 `auto-revert-notify-exclude-dir-regexp'.
1363 *** The new user option `auto-revert-remote-files' enables reversion
1364 of remote files when set to non-nil.
1369 *** The function `face-spec-set' is now like `setq' for face specs.
1370 Its third arg now accepts values specifying a face spec type (defface,
1371 custom, or override spec), and the relevant spec is set accordingly.
1374 *** New function `add-face-text-property', which can be used to
1375 conveniently prepend/append new face properties.
1377 *** Face specs set via Custom themes now replace the `defface' spec
1378 rather than inheriting from it (as do face specs set via Customize).
1381 *** New face characteristic (supports :underline (:style wave))
1382 specifies whether or not the terminal can display a wavy line.
1385 *** New face spec attribute :distant-foreground
1386 specifies foreground to use if background color is near the foreground
1387 color that would otherwise have been used.
1392 *** `image-animated-p' is now `image-multi-frame-p'.
1393 It returns non-nil for any image that contains multiple frames,
1394 whether or not it specifies a frame delay.
1397 *** New variable `image-default-frame-delay' gives the frame delay for
1398 animated images which do not specify a frame delay.
1401 *** New functions `image-current-frame' and `image-show-frame' for getting
1402 and setting the current frame of a multi-frame image.
1407 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1408 **** object-name -> eieio-object-name
1409 **** object-class -> eieio-object-class
1410 **** object-class-fast -> eieio--object-class
1411 **** object-class-name -> eieio-object-class-name
1412 **** object-name-string -> eieio-object-name-string
1413 **** object-num-slots -> eieio--object-num-slots
1414 **** object-set-name-string -> eieio-object-set-name-string
1415 **** class-of -> eieio-object-class
1416 **** class-name -> eieio-class-name
1417 **** class-parent -> eieio-class-parent
1418 **** class-parents -> eieio-class-parents
1419 **** class-parents-fast -> eieio-class-parents-fast
1420 **** class-children -> eieio-class-children
1421 **** class-num-slots -> eieio--class-num-slots
1422 **** class-precedence-list -> eieio-class-precedence-list
1423 **** class-direct-subclasses -> eieio-class-children
1424 **** class-direct-superclasses -> eieio-class-parents
1426 ** Changes in encoding and decoding of text
1429 *** New coding-system `prefer-utf-8'.
1430 This is like `undecided' but prefers UTF-8 on decoding if the text to
1431 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1432 any non-ASCII characters are automatically encoded as UTF-8.
1435 *** New attributes of coding-systems whose type is `undecided'.
1436 Two new attributes, `:inhibit-null-byte-detection' and
1437 `:inhibit-iso-escape-detection', determine how to detect encoding of
1438 text that includes null bytes and ISO-2022 escape sequences,
1439 respectively. Each of these attributes can be either nil, zero, or
1440 t. If it is t, decoding text ignores null bytes and, respectively,
1441 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1442 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1443 text is encoded in one of the ISO-2022 encodings, such as
1444 iso-2022-7bit. If the value is zero, Emacs consults the variables
1445 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1447 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1448 UTF-8 encoding and decoding, whenever possible.
1450 These attributes are only meaningful for coding-systems of type
1451 `undecided'. (The type of a coding-system is determined by its
1452 `:coding-type' attribute and can be accessed by calling the
1453 `coding-system-type' function.)
1456 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1459 ** New functions `group-gid' and `group-real-gid'.
1462 ** The spelling of the rx.el category `chinese-two-byte' has been
1463 corrected (the first 'e' was missing).
1466 ** Minor internal changes to the details of lock files.
1467 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1468 If DIR/.#FILE already exists and is not an Emacs lock file,
1469 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1470 numbered lock files DIR/.#FILE.0...).
1471 On file systems that do not support symbolic links, the lock is now a
1472 regular file with contents being what would have been in the symlink.
1474 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1477 *** The package descriptor and name of global variables, constants,
1478 and functions should be separated by two hyphens if the symbol is not
1479 meant to be used by other packages.
1482 * Changes in Emacs 24.4 on Non-Free Operating Systems
1485 ** The procedure for building Emacs on MS-Windows has changed.
1486 It is now built by running the same configure script as on all other
1487 platforms. This requires the MSYS environment and MinGW development
1488 tools. See the updated instructions in nt/INSTALL for details.
1490 Using the Posix configure script and Makefile's also means a change in
1491 the directory structure of the Emacs installation on Windows. It is
1492 now the same as on GNU and Unix systems. In particular, the auxiliary
1493 programs, such as cmdproxy.exe and hexl.exe, are in
1494 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1495 version), version-independent site-lisp is in share/emacs/site-lisp,
1496 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1497 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1498 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1499 directories and will find the files in there automatically; there's no
1500 need to set any variables due to this change.)
1503 ** Emacs on Windows 2000 and later can now access files and directories
1504 whose names cannot be encoded in the current system codepage.
1506 The new variable `w32-unicode-filenames' controls this feature: if it
1507 is t, Emacs uses Unicode APIs to pass file names to system calls,
1508 which lifts the limitation of file names to the current locale.
1511 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1512 The backtrace is written to the 'emacs_backtrace.txt' file in the
1513 directory where Emacs was running.
1516 ** The variable `buffer-file-type' is no longer supported.
1517 Setting it has no effect, and %t in the mode-line format is ignored.
1518 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1519 modifying it has no effect.
1522 ** Lock files now work on MS-Windows.
1523 This helps to prevent losing your edits if the same file is being
1524 edited in another Emacs session or by another user. See the node
1525 "Interlocking" in the Emacs User Manual for the details. To disable
1526 file locking, customize `create-lockfiles' to nil.
1528 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1529 GNUstep and Mac OS X 10.4 use the old font backend.
1530 To use the old backend by default, do on the command line:
1531 % defaults write org.gnu.Emacs FontBackend ns
1533 ** Improved fullscreen support on Mac OS X.
1534 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1535 Customize `ns-use-native-fullscreen' to change the style.
1536 For Mac OS X 10.7 and newer, native is the default.
1538 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1539 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1540 does not apply to images.
1543 * Installation Changes in Emacs 24.3
1545 ** The default X toolkit is now Gtk+ version 3.
1546 If you don't pass `--with-x-toolkit' to configure, or if you use
1547 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1548 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1549 You can explicitly require a specific version by passing
1550 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1552 ** New configure option `--enable-link-time-optimization', to utilize
1553 an appropriate feature provided by GCC since version 4.5.0.
1555 ** New configure option `--without-all' to disable most of the optional
1556 features (image support, etc.) that are normally enabled by default.
1558 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1559 Emacs). If building with GCC, this enables compile-time checks that
1560 warn/give errors about possibly-questionable C code. On a recent GNU
1561 system there should be no warnings; on older and on non-GNU systems
1562 the results may be useful to developers.
1564 ** The configure option `--enable-use-lisp-union-type' has been
1565 renamed to `--enable-check-lisp-object-type', as the resulting
1566 Lisp_Object type no longer uses a union to implement the compile time
1567 check that this option enables.
1569 ** The configure option `--disable-maintainer-mode' has been removed,
1570 as it was confusingly-named and rarely useful.
1572 ** The configure options `--program-prefix', `--program-suffix', and
1573 `--program-transform-name' apply to more than just the installed
1574 binaries. Now they also affect the man pages, icons, and the
1575 etc/emacs.desktop file; but not the info pages, since this would break
1576 links between the various manuals.
1578 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1579 overwriting "emacs" in the installation bin/ directory with a link
1582 ** Emacs uses libtinfo in preference to libncurses, if available.
1584 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1585 /usr/pkg/lib to the linker search path. You must add them yourself if
1588 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1589 (from the bin and libexec directories, respectively). The former is
1590 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1593 * Startup Changes in Emacs 24.3
1595 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1596 lisp/ directory. There should not be any there anyway. If you have
1597 been adding them there, put them somewhere else; e.g., site-lisp.
1599 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1602 * Changes in Emacs 24.3
1606 *** `C-h f' (`describe-function') can now perform autoloading.
1607 When this command is called for an autoloaded function whose docstring
1608 contains a key substitution construct, that function's library is
1609 automatically loaded, so that the documentation can be shown
1610 correctly. To disable this, set `help-enable-auto-load' to nil.
1612 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1613 even after their associated libraries have been loaded (and the
1614 autoloads have been redefined as functions).
1618 *** Images displayed via ImageMagick now support transparency and the
1619 :background image specification property.
1621 *** When available, ImageMagick support is automatically enabled.
1622 It is no longer necessary to call `imagemagick-register-types'
1623 explicitly to install ImageMagick image types; that function is called
1624 automatically at startup, or when customizing an imagemagick- option.
1626 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1627 ImageMagick to view images. (You must call `imagemagick-register-types'
1628 afterwards if you do not use customize to change this.)
1630 *** The new variable `imagemagick-enabled-types' also affects which
1631 ImageMagick types are treated as images. The function
1632 `imagemagick-filter-types' returns the list of types that will be
1637 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1638 next and previous path separator, respectively.
1640 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1641 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1642 non-nil before enabling the mode.
1646 *** New option `mode-line-default-help-echo' specifies the help text
1647 (shown in a tooltip or in the echo area) for any part of the mode line
1648 that does not have its own specialized help text.
1650 *** You can now click mouse-3 in the coding system indicator to invoke
1651 `set-buffer-file-coding-system'.
1653 ** Server and client
1655 *** emacsclient now obeys string values for `initial-buffer-choice',
1656 if it is told to open a new frame without specifying any file to visit
1657 or expression to evaluate.
1659 *** New option `server-auth-key' specifies a shared server key.
1661 ** Emacs now generates backtraces on fatal errors.
1662 On encountering a fatal error, Emacs now outputs a textual description
1663 of the fatal signal, and a short backtrace on platforms like glibc
1664 that support backtraces.
1666 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1667 This minor mode replaces `toggle-read-only', which is now obsolete.
1669 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1670 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1671 respectively, without exiting from the prompt.
1673 ** In the Package Menu, newly-available packages are listed as "new",
1674 and sorted above the other "available" packages by default.
1676 ** If your Emacs was built from a repository checkout, the new variable
1677 `emacs-bzr-version' contains information about the bzr revision used.
1679 ** New option `create-lockfiles' specifies usage of lockfiles.
1680 It defaults to t. Changing it to nil inhibits the creation of lock
1681 files (use this with caution).
1683 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1684 variables on remote hosts.
1686 ** The entry for PCL-CVS has been removed from the Tools menu.
1687 The PCL-CVS commands are still available via the keyboard.
1689 ** Using "unibyte: t" in Lisp source files is obsolete.
1690 Use "coding: raw-text" instead.
1692 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1693 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1694 The previous binding, introduced in Emacs 24.1, was a mistake, because
1695 `C-c LETTER' bindings are reserved for user customizations.
1697 ** Internationalization
1699 *** New language environment: Persian.
1701 *** New input method `vietnamese-vni'.
1703 ** Nextstep (GNUstep / Mac OS X) port
1705 *** Support for fullscreen and the frame parameter fullscreen.
1707 *** A file dialog is used for open/save operations initiated from the
1711 * Editing Changes in Emacs 24.3
1713 ** Search and Replace
1715 *** Non-regexp Isearch now performs "lax" space matching.
1716 Each sequence of spaces in the supplied search string may match any
1717 sequence of one or more whitespace characters, as specified by the
1718 variable `search-whitespace-regexp'. (This variable is also used by a
1719 similar existing feature for regexp Isearch.)
1721 *** New Isearch command `M-s SPC' toggles lax space matching.
1722 This applies to both ordinary and regexp Isearch.
1724 *** New option `replace-lax-whitespace'.
1725 If non-nil, `query-replace' uses flexible whitespace matching too.
1728 *** Global `M-s _' starts a symbol (identifier) incremental search,
1729 and `M-s _' in Isearch toggles symbol search mode.
1730 `M-s c' in Isearch toggles search case-sensitivity.
1732 ** Navigation commands
1734 *** New binding `M-g c' for `goto-char'.
1736 *** New binding `M-g TAB' for `move-to-column'.
1738 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1739 interactively with no prefix arg. Previously, it moved to column 1.
1741 ** New option `yank-handled-properties' allows processing of text
1742 properties on yanked text, in ways that are more general than just
1743 removing them (as is done by `yank-excluded-properties').
1745 ** New option `delete-trailing-lines' specifies whether
1746 M-x delete-trailing-whitespace should delete trailing lines at the end
1747 of the buffer. It defaults to t.
1749 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1751 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1752 `ucs-insert' is now an obsolete alias for `insert-char'.
1754 ** The `z' key no longer has a binding in most special modes.
1755 It used to be bound to `kill-this-buffer', but `z' is too easy to
1758 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1759 It copies the region-rectangle as the last rectangle kill.
1763 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1765 *** New option `register-separator' specifies the register containing
1766 the text to put between collected texts for use with
1767 M-x append-to-register and M-x prepend-to-register.
1770 * Changes in Specialized Modes and Packages in Emacs 24.3
1772 ** Common Lisp emulation (CL)
1774 *** CL's main entry is now (require 'cl-lib).
1775 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1776 i.e., all its definitions have the "cl-" prefix (and internal definitions
1777 use the "cl--" prefix).
1779 If `cl' provided a feature under the name `foo', then `cl-lib'
1780 provides it under the name `cl-foo' instead; with the exceptions of the
1781 few `cl' definitions that had to use `foo*' to avoid conflicts with
1782 pre-existing Elisp entities. These have been renamed to `cl-foo'
1783 rather than `cl-foo*'.
1785 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1786 provide the old, non-prefixed names. Some exceptions are listed below:
1788 *** `cl-flet' is not like `flet' (which is deprecated).
1789 Instead it obeys the behavior of Common-Lisp's `flet'.
1790 In particular, in cl-flet function definitions are lexically scoped,
1791 whereas in flet the scoping is dynamic.
1793 *** `cl-labels' is slightly different from `labels'.
1794 The difference is that it relies on the `lexical-binding' machinery
1795 (as opposed to the `lexical-let' machinery used previously) to capture
1796 definitions in closures, so such closures will only work if `lexical-binding'
1799 *** `cl-letf' is not exactly like `letf'.
1800 The only difference is in details that relate to some deprecated usage
1801 of `symbol-function' in place forms.
1803 *** `progv' was rewritten to use the `let' machinery.
1804 A side effect is that variables without corresponding values are bound
1805 to nil rather than being made unbound.
1807 *** The following methods of extending `setf' are obsolete
1808 (use features from gv.el instead):
1809 `define-modify-macro' (use `gv-letplace')
1810 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1811 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1812 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1816 *** Changes are now highlighted using the same color scheme as in
1817 modern VCSes. Deletions are displayed in red (new faces
1818 `diff-refine-removed' and `smerge-refined-removed', and new definition
1819 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1820 and `smerge-refined-added', and new definition of `diff-added').
1822 *** The variable `diff-use-changed-face' defines whether to use the
1823 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1824 changes in context diffs.
1826 *** The new command `diff-delete-trailing-whitespace' removes trailing
1827 whitespace introduced by a diff.
1829 ** Ediff now uses the same color scheme as Diff mode.
1833 A new version of python.el, which provides several new features, including:
1834 per-buffer shells, better indentation, Python 3 support, and improved
1835 shell-interaction compatible with iPython (and virtually any other
1838 *** Some user options have been replaced/renamed, including (old -> new):
1839 **** python-indent -> python-indent-offset
1840 **** python-guess-indent -> python-indent-guess-indent-offset
1841 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1842 **** python-use-skeletons -> python-skeleton-autoinsert
1844 *** Some user options have been removed, including:
1846 **** `python-indent-string-contents': Strings are never indented.
1848 **** `python-honour-comment-indentation':
1849 Comments are always considered as indentation markers.
1851 **** `python-continuation-offset': Indentation is automatically
1852 calculated in a pep8 compliant way depending on the context.
1854 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1855 Have no direct mapping as the shell interaction is completely different.
1857 **** `python-python-command', `python-jython-command':
1858 Replaced by `python-shell-interpreter'.
1860 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1861 `python-pdbtrack-minor-mode-string', `python-source-modes':
1864 *** Some commands have been replaced (old -> new):
1865 **** python-insert-class -> python-skeleton-class
1866 **** python-insert-def -> python-skeleton-def
1867 **** python-insert-for -> python-skeleton-for
1868 **** python-insert-if -> python-skeleton-if
1869 **** python-insert-try/except -> python-skeleton-try
1870 **** python-insert-try/finally -> python-skeleton-try
1871 **** python-insert-while -> python-skeleton-while
1872 **** python-find-function -> python-nav-jump-to-defun
1873 **** python-next-statement -> python-nav-forward-sentence
1874 **** python-previous-statement -> python-nav-backward-sentence
1875 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1876 **** python-end-of-defun-function -> python-nav-end-of-defun
1877 **** python-send-buffer -> python-shell-send-buffer
1878 **** python-send-defun -> python-shell-send-defun
1879 **** python-send-region -> python-shell-send-region
1880 **** python-send-region-and-go -> emulate with python-shell-send-region
1881 and python-shell-switch-to-shell
1882 **** python-send-string -> python-shell-send-string
1883 **** python-switch-to-python -> python-shell-switch-to-shell
1884 **** python-describe-symbol -> python-eldoc-at-point
1888 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1890 *** The D-Bus object manager interface is implemented.
1892 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1893 if their value does not fit into Emacs's integer range.
1895 *** The function `dbus-call-method' is now non-blocking.
1896 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1898 *** Signals can also be sent as unicast messages.
1900 *** The argument list of `dbus-register-signal' has been extended,
1901 according to the new match rule types of D-Bus.
1903 *** `dbus-init-bus' supports private connections.
1905 *** There is a new function `dbus-setenv'.
1907 ** `desktop-path' no longer includes the "." directory.
1908 Desktop files are now located in ~/.emacs.d by default.
1912 *** `dired-do-async-shell-command' executes each file sequentially
1913 if the command ends in `;' (when operating on multiple files).
1914 Otherwise, it executes the command on each file in parallel.
1916 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1917 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1920 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1921 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1922 mark/unmark/flag all files in the active region.
1924 *** The minibuffer default for `=' (`dired-diff') has changed.
1925 It is now the backup file for the file at point, if one exists.
1926 In Transient Mark mode the default is the file at the active mark.
1928 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1929 The global binding for `M-=', `count-words-region' is in effect.
1933 *** New module "notifications", which can send a notification when you
1934 receive a private message or your nickname is mentioned.
1936 *** ERC will look up server/channel names via auth-source and use any
1939 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1940 only applies to messages sent by lurkers.
1942 ** reStructuredText mode
1944 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1945 fontification, comment handling, and customization have all been revised
1948 *** Support for `imenu' and `which-function-mode'.
1950 *** The reStructuredText syntax is more closely covered.
1951 Sphinx support has been improved.
1953 *** `rst-insert-list' inserts new list or continues existing lists.
1955 *** A negative prefix argument always works for `rst-adjust'.
1957 *** The window configuration is reset after displaying a TOC.
1959 *** The constant `rst-version' describes the rst.el package version.
1963 *** Support for percent literals and recognition of regular expressions
1964 in method calls without parentheses with more methods, including Cucumber
1967 *** Improved syntax highlighting and indentation.
1969 *** New command `ruby-toggle-block', bound to `C-c {'.
1971 *** Some non-standard keybindings/commands have been removed:
1973 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1975 **** `ruby-mark-defun'; use `mark-defun'.
1977 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1978 appropriate settings for the variables `beginning-of-defun-function'
1979 and `end-of-defun-function'.
1981 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1982 `reindent-then-newline-and-indent' and `newline' have been removed.
1984 ** Shell Script mode
1986 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1988 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1990 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1994 *** The free software compiler GHDL is supported (and now the default).
1996 *** Support for the VHDL-AMS packages has been added/updated.
1998 *** Updated to the 2002 revision of the VHDL standard.
2000 *** Accepts \r and \f as whitespace.
2004 *** The faces used by Apropos are now directly customizable.
2005 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
2006 see the `apropos' Custom group for details.
2008 *** The old options whose values specified faces to use have been removed
2009 (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
2010 `apropos-match-face' and `apropos-property-face'.).
2014 *** This package has been rewritten to use Tabulated List mode.
2016 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
2017 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
2021 *** Algebraic simplification mode is now the default.
2022 To restrict to the limited simplifications given by the former
2023 default simplification mode, use `m I'.
2027 *** You can customize the header text that appears above each calendar month.
2028 See the variable `calendar-month-header'.
2030 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
2032 *** The calendars produced by cal-html include holidays.
2033 Customize `cal-html-holidays' to change this.
2037 *** The major modes from the parser generators "Bovine" and "Wisent"
2038 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
2039 are in `auto-mode-alist', and the corresponding manuals are included.
2043 **** Menu support for the "Configuration" feature. This allows users to
2044 choose the active configuration (such as debug or install) from the menu.
2046 **** New command `ede-set' to interactively set project-local variables.
2048 **** Support for compiling, debugging, and running in "generic" projects.
2050 **** Autoconf editing support for M4 macros with complex arguments.
2052 **** Compilation support for the "linux" project type.
2054 **** "simple" projects have been removed; use "generic" projects instead.
2058 **** Support for parsing #include statements inside a namespace in C/C++.
2060 **** Improved support for 'extern "C"' declarations in C/C++.
2062 **** The ability to ignore more common special C/C++ preprocessor symbols,
2063 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
2064 If available, include cdefs.h as an additional source of preprocessor symbols.
2066 **** Improved C/C++ function pointer parsing.
2068 **** In Python, support for converting imports to include file names.
2070 **** Ability to dynamically determine the Python load path.
2072 **** Support for the Python 'WITH' and 'AT' keywords.
2074 **** Improved tooltip completion.
2078 **** The SRecode manual is now included.
2080 **** Tag generation supports constructor/destructor settings and system
2081 include differentiation.
2083 **** Addition of 'Framework' support: Frameworks are specified when a
2084 particular kind of library (such as Android) is needed in a common language
2087 **** Support for nested templates and let variables override based on priority.
2089 **** Support for merging tables from multiple related modes, such as
2090 default -> c++ -> arduino.
2092 ** Compile has a new option `compilation-always-kill'.
2096 *** `custom-reset-button-menu' now defaults to t.
2098 *** Non-option variables are never matched in `customize-apropos' and
2099 `customize-apropos-options' (i.e., the prefix argument does nothing for
2100 these commands now).
2104 *** The variables `term-default-fg-color' and `term-default-bg-color'
2105 are now deprecated in favor of the customizable face `term'.
2107 *** You can customize how to display ANSI terminal colors and styles
2108 by customizing the corresponding `term-color-<COLOR>',
2109 `term-color-underline' and `term-color-bold' faces.
2113 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
2115 *** Remote processes are now also supported on remote MS-Windows hosts.
2119 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
2120 Previously, this slot stored semicolon-separated attribute-value pairs
2121 appended to some imap URLs, but this is not compatible with RFC 3986.
2122 So now the `filename' slot stores the entire path and query components,
2123 and the `attributes' slot is always nil.
2125 *** New function `url-encode-url' for encoding a URI string.
2126 The `url-retrieve' function now uses this to encode its URL argument,
2127 in case that is not properly encoded.
2129 ** notifications.el supports now version 1.2 of the Notifications API.
2130 The function `notifications-get-capabilities' returns the supported
2133 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2134 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2135 `flymake-warning-bitmap'.
2137 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2138 specifying URL types that should be converted to remote file names at
2139 the FFAP prompt. The default is now '("ftp").
2141 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2142 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2144 ** New option `mouse-avoidance-banish-position' specifies where the
2145 `banish' mouse avoidance setting moves the mouse.
2147 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2148 closing brackets to be aligned with the line of the opening bracket.
2150 ** In Proced mode, new command `proced-renice' renices marked processes.
2152 ** New option `async-shell-command-buffer' specifies the buffer to use
2153 for a new asynchronous `shell-command' when the default output buffer
2154 `*Async Shell Command*' is already in use.
2156 ** SQL mode has a new option `sql-db2-escape-newlines'.
2157 If non-nil, newlines sent to the command interpreter will be escaped
2158 by a backslash. The default does not escape the newlines and assumes
2159 that the sql statement will be terminated by a semicolon.
2161 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2162 (and modes that derive from it), sorts the column at point, or the Nth
2163 column if a numeric prefix argument is given.
2165 ** `which-func-modes' now defaults to t, so Which Function mode, when
2166 enabled, applies to all applicable major modes.
2168 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2171 ** Follow mode no longer works by using advice.
2172 The option `follow-intercept-processes' has been removed.
2174 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2176 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2177 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2178 *** semantic-change-hooks -> semantic-change-functions
2179 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2180 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2181 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2182 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2183 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2184 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2185 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2186 *** rcirc-activity-hooks -> rcirc-activity-functions
2187 *** rcirc-print-hooks -> rcirc-print-functions
2188 *** dbus-event-error-hooks -> dbus-event-error-functions
2189 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2190 *** checkdoc-style-hooks -> checkdoc-style-functions
2191 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2192 *** archive-extract-hooks -> archive-extract-hook
2193 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2194 *** hfy-post-html-hooks -> hfy-post-html-hook
2195 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2196 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2197 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2198 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2200 ** Obsolete packages
2203 In most cases, assoc+member+push+delq work just as well.
2204 And in any case it's just a terrible package: ugly semantics, terrible
2205 inefficiency, and not namespace-clean.
2214 * Incompatible Lisp Changes in Emacs 24.3
2216 ** Docstrings starting with `*' no longer indicate user options.
2217 Only variables defined using `defcustom' are considered user options.
2218 The function `user-variable-p' is now an obsolete alias for
2219 `custom-variable-p'.
2221 ** The return values of `defalias', `defun' and `defmacro' have changed,
2222 and are now undefined. For backwards compatibility, `defun' and
2223 `defmacro' currently return the name of the newly defined
2224 function/macro, but this should not be relied upon.
2226 ** `random' by default now returns a different random sequence in
2227 every Emacs run. Use `(random S)', where S is a string, to set the
2228 random seed to a value based on S, in order to get a repeatable
2229 sequence in later calls.
2231 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2232 that substring is inserted literally even if the LITERAL arg is
2233 non-nil, instead of causing an error to be signaled.
2235 ** `select-window' now always makes the window's buffer current.
2236 It does so even if the window was selected before.
2238 ** The function `x-select-font' can return a font spec, instead of a
2239 font name as a string. Whether it returns a font spec or a font name
2240 depends on the graphical library.
2242 ** `face-spec-set' no longer sets frame-specific attributes when the
2243 third argument is a frame (that usage was obsolete since Emacs 22.2).
2245 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2247 ** The CL package's `get-setf-method' function no longer exists.
2248 Generalized variables are now part of core Emacs Lisp, and implemented
2249 differently to the way cl.el used to do it. It is not possible to
2250 define a compatible replacement for `get-setf-method'. See the file
2251 gv.el for internal details of the new implementation.
2253 ** The arguments of `dbus-register-signal' are no longer just strings,
2254 but keywords or keyword-string pairs. The old argument list will
2255 still be supported for Emacs 24.x.
2257 ** Miscellaneous name changes
2258 Some Lisp symbols have been renamed to correct their spelling,
2259 or to be more consistent with standard Emacs terminology.
2261 *** Renamed functions
2262 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2263 **** inactivate-input-method -> deactivate-input-method
2264 **** quail-inactivate -> quail-deactivate
2265 **** robin-inactivate -> robin-deactivate
2266 **** viper-inactivate-input-method -> viper-deactivate-input-method
2267 **** viper-inactivate-input-method-action ->
2268 viper-deactivate-input-method-action
2269 **** ucs-input-inactivate -> ucs-input-deactivate
2272 The old hooks are still supported for backward compatibility, but they
2273 are deprecated and will be removed eventually.
2274 **** input-method-inactivate-hook -> input-method-deactivate-hook
2275 **** robin-inactivate-hook -> robin-deactivate-hook
2276 **** quail-inactivate-hook -> quail-deactivate-hook
2278 *** Renamed variables
2279 **** follow-deactive-menu -> follow-inactive-menu
2280 **** inactivate-current-input-method-function ->
2281 deactivate-current-input-method-function
2283 ** Some obsolete functions, variables, and faces have been removed:
2284 *** `last-input-char', `last-command-char', `unread-command-char'
2285 *** `facemenu-unlisted-faces'
2286 *** `rmail-decode-mime-charset'
2287 *** `iswitchb-read-buffer'
2288 *** `sc-version', `sc-submit-bug-report'
2289 *** `set-char-table-default'
2290 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2291 *** `compile-internal'
2293 *** `mode-line-inverse-video'
2294 *** `follow-mode-off-hook'
2295 *** `cvs-commit-buffer-require-final-newline'
2296 (use `log-edit-require-final-newline' instead)
2297 *** `cvs-changelog-full-paragraphs'
2298 (use `log-edit-changelog-full-paragraphs' instead)
2299 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2300 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2301 *** `vc-master-templates' (use `vc-handled-backends' instead)
2302 *** `vc-checkout-carefully'
2305 * Lisp Changes in Emacs 24.3
2307 ** CL-style generalized variables are now in core Elisp.
2308 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2309 You can define your own generalized variables using `gv-define-simple-setter',
2310 `gv-define-setter', etc.
2312 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2313 This can significantly speed up execution of non-byte-compiled code,
2314 but can also bump into previously unnoticed cyclic dependencies.
2315 These are generally harmless: they will simply cause the macro calls
2316 to be left for later expansion (as before), but will result in a
2317 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2318 You may wish to restructure your code so this does not happen.
2320 ** New sampling-based Elisp profiler.
2321 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2322 When finished, use M-x profiler-stop. The sampling rate can be based on
2323 CPU time or memory allocations.
2325 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2326 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2328 ** New macros `setq-local' and `defvar-local'.
2330 ** Face underlining can now use a wave.
2332 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2333 of `read-regexp' accepts a string ending with a colon and space, and its
2334 second argument DEFAULTS can be a list of strings accessible via `M-n'
2335 in the minibuffer ahead of other hard-coded useful regexp-related values.
2336 More commands use `read-regexp' now to read their regexp arguments.
2340 *** New function `completion-table-with-quoting' to handle completion
2341 in the presence of quoting, such as file completion in shell buffers.
2343 *** New function `completion-table-subvert' to use an existing completion
2344 table, but with a different prefix.
2348 *** New error type and new function `user-error'.
2349 These do not trigger the debugger.
2351 *** New option `debugger-bury-or-kill', saying what to do with the
2352 debugger buffer when exiting debug.
2354 *** Set `debug-on-message' to enter the debugger when a certain
2355 message is displayed in the echo area. This can be useful when trying
2356 to work out which code is doing something.
2358 *** New var `inhibit-debugger', automatically set to prevent accidental
2359 recursive invocations.
2363 *** New command `fit-frame-to-buffer' adjusts the frame height to
2366 *** The command `fit-window-to-buffer' can adjust the frame height
2367 if the new option `fit-frame-to-buffer' is non-nil.
2369 *** New macro `with-temp-buffer-window', similar to
2370 `with-output-to-temp-buffer'.
2372 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2375 *** New option `switch-to-buffer-preserve-window-point' to restore a
2376 window's point when switching buffers.
2378 *** New display action alist entries `window-height' and `window-width'
2379 specify the size of new windows created by `display-buffer'.
2381 *** New display action alist entry `pop-up-frame-parameters', if
2382 non-nil, specifies frame parameters to give any newly-created frame.
2384 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2385 tells display action functions to avoid changing which frame is
2388 *** New display action alist entry `previous-window', if non-nil,
2389 specifies window to reuse in `display-buffer-in-previous-window'.
2391 *** New display action functions `display-buffer-below-selected',
2392 and `display-buffer-in-previous-window'.
2394 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2395 now accept a third argument to avoid choosing the selected window.
2397 *** Additional values recognized for option `window-combination-limit'.
2399 *** The following variables are obsolete, as they can be replaced by
2400 appropriate entries in the `display-buffer-alist' function introduced
2402 **** `dired-shrink-to-fit'
2403 **** `display-buffer-reuse-frames'
2404 **** `display-buffer-function'
2405 **** `special-display-buffer-names'
2406 **** `special-display-frame-alist'
2407 **** `special-display-function'
2408 **** `special-display-regexps'
2412 *** `current-time-string' no longer requires that its argument's year
2413 must be in the range 1000..9999. It now works with any year supported
2414 by the underlying C implementation.
2416 *** `current-time' now returns extended-format time stamps
2417 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2418 PSEC is typically a multiple of 1000 on current machines. Other
2419 functions that use this format, such as `file-attributes' and
2420 `format-time-string', have been changed accordingly. Old-format time
2421 stamps are still accepted.
2423 *** The format of timers in `timer-list' and `timer-idle-list' is now
2424 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2425 The PSECS slot is new, and uses picosecond resolution. It can be
2426 accessed via the new `timer--psecs' accessor.
2428 *** Last-modified time stamps in undo lists now are of the form
2429 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2433 *** Improved security when handling persistent objects:
2435 **** `eieio-persistent-read' now features optional arguments for specifying
2436 the class to load, as well as a flag stating whether subclasses are allowed;
2437 if provided, other classes will be rejected by the reader. For
2438 compatibility with existing code, if the class is omitted only a
2441 **** New specialized reader for pulling in classes and signaling errors
2442 without evaluation of suspicious code.
2444 **** All slots that contain objects must have a :type. Slots with lists
2445 of objects must use a new type predicate for a list of an object type.
2447 *** Support for `find-function' and similar utilities, through the addition
2448 of filename support to generated symbols.
2450 ** Floating point functions now always return special values like NaN,
2451 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2452 Previously, they returned NaNs on some platforms but signaled errors
2453 on others. The affected functions are acos, asin, tan, exp, expt,
2454 log, log10, sqrt, and mod.
2456 ** New fringe bitmap `exclamation-mark'.
2458 ** Miscellaneous changes to special forms and macros
2460 *** `defun' and `defmacro' are now macros rather than special forms.
2462 *** `kbd' is now a function rather than a macro.
2464 ** Miscellaneous new functions
2466 *** `set-temporary-overlay-map' sets up a temporary keymap that
2467 takes precedence over most other maps for a short while (normally one key).
2469 *** `autoloadp' tests if its argument is an autoloaded object.
2471 *** `autoload-do-load' performs the autoloading operation.
2473 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2475 *** `file-name-base' returns a file name sans directory and extension.
2477 *** `function-get' fetches a function property, following aliases.
2479 *** `posnp' tests if an object is a `posn'.
2481 *** `system-users' returns the user names on the system.
2483 *** `system-groups' returns the group names on the system.
2485 *** `tty-top-frame' returns the topmost frame of a text terminal.
2487 ** The following functions and variables are obsolete:
2488 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2489 *** `buffer-has-markers-at'
2490 *** `macro-declaration-function' (use `macro-declarations-alist')
2491 *** `window-system-version' (provides no useful information)
2492 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2493 *** `query-replace-interactive'
2494 *** `font-list-limit' (has had no effect since Emacs < 23)
2497 * Changes in Emacs 24.3 on Non-Free Operating Systems
2499 ** Cygwin builds can use the native MS Windows user interface.
2500 Pass `--with-w32' to configure. The default remains the X11 interface.
2502 ** Two new functions are available in Cygwin builds:
2503 `cygwin-convert-file-name-from-windows' and
2504 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2505 code to access the Cygwin file-name mapping machinery to convert
2506 between Cygwin and Windows-native file and directory names.
2508 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2509 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2510 `mouse-autoselect-window'.
2512 ** On MS Windows Vista and later Emacs now supports symbolic links.
2514 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2515 support for libxml2, even if its presence is detected.
2517 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2519 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2520 directories to the search path. You must add them yourself if you want them.
2523 * Changes in Emacs 24.2
2525 ** This is mainly a bug-fix release.
2528 * Installation Changes in Emacs 24.1
2530 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2531 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2532 also depend on Gtk+. You can disable them with --without-rsvg and
2535 ** Emacs can be compiled with GnuTLS support.
2536 This happens by default if a suitably recent version of the library is
2537 found at build time. To prevent this, use the configure option
2538 `--without-gnutls'. See below for GnuTLS features.
2540 ** Emacs can be compiled with SELinux support.
2541 This happens by default if a suitably recent version of the library is
2542 found at build time. To prevent this, use the configure option
2543 `--without-selinux'. See below for SELinux features.
2545 ** Emacs can be compiled with ImageMagick support.
2546 This happens by default if a suitably recent version of the library is
2547 found at build time. To prevent this, use the configure option
2548 `--without-imagemagick'. See below for ImageMagick features.
2549 This feature is not available for the Nextstep or MS ports.
2551 ** Emacs can be compiled with libxml2 support.
2552 This happens by default if a suitably recent version of the library is
2553 found at build time. To prevent this, use the configure option
2554 `--without-xml2'. See below for libxml2 features.
2556 ** By default, the installed Info and man pages are compressed.
2557 You can disable this by configuring --without-compress-info.
2559 ** New configure option --with-wide-int.
2560 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2561 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2564 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2565 These provide no new functionality, they just remove the need to edit
2566 lib-src/Makefile by hand in order to use the associated features.
2568 ** New configure option --enable-use-lisp-union-type.
2569 This is only useful for Emacs developers to debug certain types of bugs.
2570 This is not a new feature; only the configure flag is new.
2572 ** The standalone programs digest-doc and sorted-doc are removed.
2573 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2575 ** The standalone program `fakemail' is removed.
2576 If you need it, feedmail.el provides a superset of the functionality.
2579 * Startup Changes in Emacs 24.1
2581 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2582 command line arguments, and the EMACS_UNIBYTE environment variable, no
2583 longer have any effect. (They were declared obsolete in Emacs 23.)
2585 ** New command line option `--no-site-lisp' removes site-lisp directories
2586 from load-path. -Q now implies this. This option does not affect the
2587 EMACSLOADPATH environment variable (and hence has no effect for
2591 * Changes in Emacs 24.1
2595 *** Many packages now use the `completion-at-point' command,
2596 rather than implementing separate completion commands.
2598 *** `completion-at-point' now handles tags and semantic completion.
2600 *** Completion in a non-minibuffer now tries to detect the end of completion
2601 and pops down the *Completions* buffer accordingly.
2603 *** New option `completion-cycle-threshold' allows completion cycling.
2605 *** New option `completion-category-overrides' for overriding the
2606 default completion style in certain circumstances.
2608 *** New completion style `substring'.
2610 *** Completion of buffer names uses `substring' completion by default.
2612 *** The option `widget-complete-field' has been removed.
2616 *** The first time you try sending mail, Emacs asks for a mail method.
2617 This is implemented by a new default for `send-mail-function', which
2618 is `sendmail-query-once'. This offers to use the smtpmail package, or
2619 to use the old defaults relying on external mail facilities
2620 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2621 `mailclient-send-it' on Windows).
2623 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2624 transfers the report to your desktop's preferred mail client, if there
2625 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2628 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2629 and Mail mode changes
2631 ** Emacs server and client changes
2633 *** New option `server-port' specifies the port for TCP Emacs servers.
2635 *** New emacsclient argument -q/--quiet suppresses some status messages.
2637 *** New emacsclient argument --frame-parameters specifies the frame
2638 parameters of any newly-created graphical frame.
2640 *** If emacsclient shuts down due to Emacs signaling an error,
2641 its exit status is 1.
2643 *** New emacsclient argument --parent-id ID.
2644 This opens a client frame in parent X window ID, via XEmbed, similar
2645 to the --parent-id argument to Emacs.
2647 ** Internationalization changes
2649 *** Emacs now supports display and editing of bidirectional text.
2650 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2651 displayed in the correct visual order as expected by users of those
2652 scripts. The display reordering is a "full bidirectionality" class
2653 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2654 with no RTL text should look exactly the same as before.
2656 **** New buffer-local variable `bidi-display-reordering'.
2657 To disable display reordering in a buffer, change this to nil.
2659 **** New buffer-local variable `bidi-paragraph-direction'.
2660 If nil (the default), Emacs determines the base direction of each
2661 paragraph from its text, as specified by the UBA. Setting the value
2662 to `right-to-left' or `left-to-right' forces a base direction on each
2665 Paragraphs with right-to-left base direction are displayed starting at
2666 the right window edge.
2668 *** Enhanced support for characters with no glyphs in available fonts,
2669 or, on text terminals, characters that cannot be encoded by the
2670 terminal coding system. The new option `glyphless-char-display-control'
2671 specifies how to display them: as a hexadecimal code in a box, a thin
2672 1-pixel space, an empty box, etc.
2674 *** New input methods for Farsi and Bulgarian
2675 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2677 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2678 (U+2010 and U+2011).
2680 *** New Hebrew translation of the Emacs Tutorial.
2681 Type `C-u C-h t' to choose it in case your language setup doesn't
2682 automatically select it.
2684 ** An Emacs Lisp package manager is now included.
2685 This is a convenient way to download and install additional packages,
2686 from a package repository at http://elpa.gnu.org.
2688 *** M-x list-packages shows a list of packages, which can be
2689 selected for installation.
2691 *** New command `describe-package', bound to `C-h P'.
2693 *** By default, all installed packages are loaded automatically when
2694 Emacs starts up. To disable this, set `package-enable-at-startup' to
2695 nil. To specify the packages to load, customize `package-load-list'.
2697 ** Custom theme changes
2699 *** New command `M-x customize-themes', which provides a convenient
2700 interface for enabling and disabling Custom themes.
2702 *** New option `custom-theme-load-path' is the load path for themes.
2703 Emacs no longer looks for Custom themes in `load-path'. The default
2704 value of `custom-theme-load-path' says to look for themes in
2705 `custom-theme-directory', followed by a subdirectory of
2706 `data-directory' named "themes/", which contains a small selection of
2707 built-in Custom themes.
2709 *** New option `custom-safe-themes' records known-safe theme files.
2710 If a theme is not in this list, Emacs queries before loading it, and
2711 offers to save the theme to `custom-safe-themes' automatically. By
2712 default, all themes included in Emacs are treated as safe.
2714 ** Improved GTK integration
2716 *** GTK scroll-bars are now placed on the right by default.
2717 The function `set-scroll-bar-mode' can change this.
2719 *** GTK tool bars can have just text, just images or images and text.
2720 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2721 the default is taken from desktop settings.
2723 *** GTK tool bars can be placed on any edge of the frame.
2724 The frame-parameter tool-bar-position controls this. It takes the
2725 values top, left, right or bottom. The Options => Show/Hide menu has
2728 *** The default colors for selected text (the `region' face) are taken
2729 from the GTK theme when Emacs is built with GTK.
2731 *** Emacs uses GTK tooltips by default if built with GTK.
2732 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2734 ** Graphical interface changes
2736 *** On graphical displays, the mode-line no longer ends in dashes.
2737 Also, the first dash (which does not indicate anything) is just
2738 displayed as a space.
2740 *** `menu-bar-select-buffer-function' lets you choose another operation
2741 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2743 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2744 built with Xft. These fonts can be set via X resources, for example:
2745 Emacs.pane.menubar.font: Courier-12
2749 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2750 or if it receives a SIGINT signal in batch mode.
2752 *** `kill-emacs-hook' is now also run in batch mode.
2753 Third-party code which adds to `kill-emacs-hook' should check if they
2754 do the right thing in batch mode.
2756 ** Scrolling changes
2758 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2759 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2760 of buffer at first key-press (instead they move to top/bottom of buffer)
2761 when `scroll-error-top-bottom' is non-nil.
2763 *** New option `scroll-error-top-bottom' (see above).
2765 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2766 scroll a line instead of full screen.
2768 *** New property `scroll-command' should be set on a command's symbol to
2769 define it as a scroll command affected by `scroll-preserve-screen-position'.
2771 *** If you customize `scroll-conservatively' to a value greater than 100,
2772 Emacs will never recenter point in the window when it scrolls due to
2773 cursor motion commands or commands that move point (e.f., `M-g M-g').
2774 Previously, you needed to use `most-positive-fixnum' as the value of
2775 `scroll-conservatively' to achieve the same effect.
2777 *** "Aggressive" scrolling now honors the scroll margins.
2778 If you customize `scroll-up-aggressively' or
2779 `scroll-down-aggressively' and move point off the window, Emacs now
2780 scrolls the window so as to avoid positioning point inside the scroll
2783 ** Basic SELinux support has been added.
2784 This requires Emacs to be linked with libselinux at build time.
2786 *** Emacs preserves the SELinux file context when backing up.
2787 Also, the function `copy-file' has an extra optional argument for
2788 preserving SELinux context, and the return value of `backup-buffer'
2789 now includes the SELinux context.
2791 *** New functions `file-selinux-context' and `set-file-selinux-context'
2792 get and set the SELinux context of a file.
2796 *** `delete-by-moving-to-trash' now only affects commands that specify
2797 trashing. This avoids inadvertently trashing temporary files.
2799 *** Calling `delete-file' or `delete-directory' with a prefix argument
2800 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2802 ** File- and directory-local variable changes
2804 *** You can stop directory local vars from applying to subdirectories.
2805 Add an element (subdirs . nil) to the alist portion of any variables
2806 settings to indicate that the section should not apply to
2809 *** Directory local variables can apply to some file-less buffers.
2810 Affected modes include dired, vc-dir, and log-edit. For example,
2811 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2812 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2813 `hack-dir-local-variables-non-file-buffer' to support this.
2815 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2816 Instead, use "eval: (minor-mode 1)".
2818 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2819 to `inhibit-local-variables-regexps'. As the name suggests, it now
2820 applies to ALL file local variables, not just -*- lines. The
2821 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2826 *** The `quit-window' command now restores the last buffer displayed
2827 in the quitted window.
2829 *** Resizing an Emacs frame now preserves proportional window sizes,
2830 modulo restrictions like window minimum sizes and fixed-size windows.
2832 *** The behavior of `display-buffer' is now customizable in detail.
2834 **** New option `display-buffer-base-action' specifies a list of
2835 user-determined display "actions" (functions and optional arguments
2836 for choosing the displaying window).
2838 This takes precedence over the default display action, which is
2839 specified by `display-buffer-fallback-action'.
2841 **** New option `display-buffer-alist' maps buffer name regexps to
2842 display actions, taking precedence over `display-buffer-base-action'.
2844 *** New option `window-combination-limit'.
2845 The new option `window-combination-limit' allows to return the space
2846 obtained for resizing or creating a window more reliably to the window
2847 from which such space was obtained.
2849 *** New option `window-combination-resize'.
2850 The new option `window-combination-resize' allows to split a window that
2851 otherwise cannot be split because it's too small by stealing space from
2852 other windows in the same combination. Subsequent resizing or deletion
2853 of the window will resize all windows in the same combination as well.
2855 *** New option `frame-auto-hide-function' lets you choose between
2856 iconifying or deleting a frame when burying a buffer in a dedicated
2857 frame, or quitting a window showing a buffer in a frame of its own.
2859 *** New commands `maximize-window' and `minimize-window'.
2860 These maximize and minimize the size of a window within its frame.
2862 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2863 These functions allow to navigate through the live buffers that have
2864 been shown in a specific window.
2866 ** Minibuffer changes
2868 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2869 This is handy for minibuffer-only frames, and is also used for the feature
2870 where mouse-1 pops up *Messages*"', which can now easily be changed.
2872 *** Minibuffers set `truncate-lines' to nil.
2873 If you want to change the value to something else, you could use
2874 for example `minibuffer-setup-hook'.
2876 ** `auto-mode-case-fold' is now enabled by default.
2878 ** `backup-by-copying-when-mismatch' now defaults to t.
2880 ** New basic faces `error', `warning', `success'.
2881 These are used to highlight text indicating failure, caution or
2882 successful operation.
2884 ** New option `list-colors-sort' defines the color sort order
2885 for `list-colors-display'.
2887 ** The variable `focus-follows-mouse' now always defaults to nil.
2890 * Editing Changes in Emacs 24.1
2894 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2895 `isearch-yank-line'.
2897 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2898 `isearch-yank-kill'.
2900 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2902 ** New commands `count-words-region' and `count-words'.
2904 *** M-= is bound to `count-words-region', not `count-lines-region'.
2905 The `count-words-region' command, when called interactively, reports
2906 the number of lines, words, and characters in the region. It is a
2907 superset of the old `count-lines-region', which is now an obsolete
2910 ** The command `just-one-space' (M-SPC), if given a negative argument,
2911 also deletes newlines around point.
2915 *** New option `delete-active-region'.
2916 If non-nil, [delete] and DEL delete the region if it is active and no
2917 prefix argument is given. If set to `kill', those commands kill
2920 *** New command `delete-forward-char', bound to [delete].
2921 This is meant for interactive use, and obeys `delete-active-region'.
2922 The command `delete-char' does not obey `delete-active-region'.
2924 *** `delete-backward-char' is now a Lisp function.
2925 Apart from obeying `delete-active-region', its behavior is unchanged.
2926 However, the byte compiler now warns if it is called from Lisp; Lisp
2927 callers should use delete-char with a negative argument instead.
2929 *** The option `mouse-region-delete-keys' has been deleted.
2931 ** Selection changes.
2933 The default handling of clipboard and primary selections has been
2934 changed to conform with modern X applications. In short, most
2935 commands for killing and yanking text now use the clipboard, while
2936 mouse commands use the primary selection.
2938 In the following, we provide a list of these changes, followed by a
2939 list of steps to get the old behavior back if you prefer that.
2941 *** `select-active-regions' now defaults to t.
2942 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2943 the kill ring. The selected text is put in the primary selection, if
2944 the system possesses a separate primary selection facility (e.g. X).
2946 **** `select-active-regions' also accepts a new value, `only'.
2947 This means to only set the primary selection for temporarily active
2948 regions (usually made by mouse-dragging or shift-selection);
2949 "ordinary" active regions, such as those made with C-SPC followed by
2950 point motion, do not alter the primary selection.
2952 **** `mouse-drag-copy-region' now defaults to nil.
2954 *** mouse-2 is now bound to `mouse-yank-primary'.
2955 This pastes from the primary selection, ignoring the kill-ring.
2956 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2958 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2960 *** `x-select-enable-primary' now defaults to nil.
2961 Thus, commands that kill text or copy it to the kill-ring (such as
2962 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2964 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2965 exactly equivalent to M-w, C-w, and C-y respectively.
2967 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2968 non-nil by default, as Windows does not support the primary selection
2969 between applications.
2971 *** To return to the previous behavior, do the following:
2973 **** Change `select-active-regions' to nil.
2974 **** Change `mouse-drag-copy-region' to t.
2975 **** Change `x-select-enable-primary' to t (on X only).
2976 **** Change `x-select-enable-clipboard' to nil.
2977 **** Bind `mouse-yank-at-click' to mouse-2.
2979 *** Support for X cut buffers has been removed.
2981 *** X clipboard managers are now supported.
2982 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2984 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2985 in the current rectangle. With a prefix argument, this prompts for a
2986 number to count from and for a format string.
2988 ** `redisplay-dont-pause' now defaults to t.
2989 This makes Emacs feel more responsive to editing commands that arrive
2990 at high rate, e.g. if you lean on some key, because stopping redisplay
2991 in the middle (when this variable is nil) forces more expensive
2992 updates later on, and Emacs appears to be unable to keep up.
2994 ** The behavior of <TAB> for active regions in Text mode has changed.
2995 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2996 when the region is active causes Emacs to indent all the lines in the
2997 region, aligning them with the line previous to the first line in the
2998 region (or with the left margin if there is no previous line).
3000 ** When `occur' is called with a prefix argument, matching strings are
3001 collected into the `*Occur*' buffer without line numbers. If there
3002 are parenthesized subexpressions in the specified regexp, `occur'
3003 reads replacement text that may contain \\& and \\N whose convention
3004 follows `replace-match'.
3007 * Changes in Specialized Modes and Packages in Emacs 24.1
3009 ** Archive Mode has basic support for browsing and updating 7z archives.
3013 *** BibTeX mode now supports biblatex.
3014 Use the variable `bibtex-dialect' to select different BibTeX dialects.
3015 `bibtex-entry-field-alist' is now an obsolete alias for
3016 `bibtex-BibTeX-entry-alist'.
3018 *** New command `bibtex-search-entries', bound to C-c C-a.
3020 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
3022 *** New variable `bibtex-search-entry-globally'.
3026 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
3028 *** The default browser used by the package is now the "xdg-open" program,
3029 on platforms that support it. This calls your desktop's preferred browser.
3033 *** Support for musical notes.
3035 *** Support for logarithmic units.
3037 *** No longer uses the tex prefix for TeX specific unit names when
3038 using TeX or LaTeX mode.
3040 *** New option to highlight selections using faces.
3042 *** `calc-histogram' has the option of using a vector to determine the bins.
3044 *** New "O" option prefix.
3046 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
3048 ** Calendar, Diary, and Appt
3050 *** Diary entries can contain non-printing "comments".
3051 See the variable `diary-comment-start'.
3053 *** Appointments can specify their individual warning times.
3054 See the variable `appt-warning-time-regexp'.
3056 *** The function specified by `appt-disp-window-function' may be passed
3057 lists of arguments if multiple appointments are due at similar times.
3058 If you are using a custom function for this, you should update it.
3060 *** New function `diary-hebrew-birthday'.
3062 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
3063 may no longer be nil, but must all be strings.
3065 *** The obsolete (since Emacs 22.1) method of enabling the appt
3066 package by adding `appt-make-list' to `diary-hook' has been removed.
3067 Use `appt-activate' instead.
3069 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
3070 appt-issue-message (use the function appt-activate)
3071 appt-visible/appt-msg-window (use the variable appt-display-format)
3073 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
3074 view-diary-entries, list-diary-entries, show-all-diary-entries
3078 *** New feature to "guess" the style in an existing buffer.
3079 The main entry point is M-x c-guess.
3081 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
3083 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
3084 Thus C-M-a will, by default, go to the beginning of the immediate function,
3087 *** "Macros with semicolons" can be registered for correct indentation.
3088 Where such a macro ends a line (no semicolon) the next statement is no longer
3089 parsed as a statement continuation.
3091 ** Comint and modes derived from it use the standard completion code.
3095 *** Compilation mode can be used without Font Lock mode.
3096 `compilation-parse-errors-function' is now obsolete.
3098 *** New variable `compilation-filter-start', which is bound while
3099 `compilation-filter-hook' runs. It records the start position of the
3100 text inserted by `compilation-filter'.
3102 *** `compilation-error-screen-columns' and `compilation-first-column'
3103 are obeyed in the editing buffer. So programming language modes can
3104 set them, whereas previously only the value in the *Compilation*
3109 *** Customize buffers now contain a search field.
3110 The search is performed using `customize-apropos'.
3111 To turn off the search field, set `custom-search-field' to nil.
3113 *** Options in customize group buffers start out hidden if not customized.
3114 Use the arrow to the left of the option name to toggle visibility.
3116 *** custom-buffer-sort-alphabetically now defaults to t.
3118 *** The color widget now has a "Choose" button, which allows you to
3119 choose a color via `list-colors-display'.
3123 *** It is now possible to access buses other than the default system
3126 *** The `dbus-register-method' and `dbus-register-property' functions
3127 optionally do not register names.
3129 *** The new function `dbus-register-service' registers a known service
3130 name on a D-Bus without also registering a property or a method.
3134 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3135 if called with a prefix argument, read a file name from the minibuffer
3136 instead of using the current buffer.
3138 *** The "dired local variables" feature of Dired-x is obsolete.
3139 The standard directory local variables feature replaces it.
3143 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3144 controlling attempts to autojoin a channel.
3146 *** New variable `erc-coding-system-precedence': If we use `undecided'
3147 as the server coding system, this variable will then be consulted.
3148 The default is to decode strings that can be decoded as utf-8 as
3149 utf-8, and do the normal `undecided' decoding for the rest.
3153 *** The default value of `eshell-directory-name' has changed
3154 to be an "eshell" directory in `user-emacs-directory'.
3155 The old "~/.eshell/" directory is still used if it exists, though.
3159 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3160 It now supports multithread non-stop debugging and simultaneous
3161 debugging of several threads.
3165 *** RET (`image-toggle-animation') toggles animation, if applicable.
3166 Animation plays once, unless the option `image-animate-loop' is non-nil.
3170 *** New command M-x info-display-manual displays a named Info manual.
3171 If that manual is already visited in some Info buffer, it displays
3172 that buffer. (This is handy if you have many manuals in many *info*
3173 buffers, and don't remember the name of the buffer visiting the manual
3174 you want to consult.) Otherwise, it loads and displays the manual.
3176 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3177 This is for compatibility with the stand-alone Info reader program,
3178 and also because `Info-edit' is a rarely used command that is disabled
3181 ** Mail mode changes (not Message mode)
3183 *** New command M-x mail-add-attachment for adding MIME attachments
3185 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3186 (Its name is misleading, since it has nothing to do with MIME
3187 attachments.) The old name is now an obsolete alias to the new name.
3189 ** MH-E has been updated to MH-E version 8.3.1.
3190 See MH-E-NEWS for details.
3192 ** Modula-2 mode provides auto-indentation.
3194 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3196 ** nXML mode no longer binds C-RET to `nxml-complete'.
3197 Completion is now performed via `completion-at-point', bound to C-M-i
3198 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3199 default), this performs tag completion.
3201 ** Org mode has been updated to version 7.8.09.
3202 See ORG-NEWS for details.
3204 ** Prolog mode has been completely revamped, with lots of additional
3205 functionality such as more intelligent indentation, electricity,
3206 support for more variants, including Mercury, and a lot more.
3210 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3211 in the Rmail incoming message.
3213 *** The variable `rmail-message-filter' no longer has any effect.
3214 This change was made in Emacs 23.1 but was not advertised at the time.
3215 Try using `rmail-show-message-hook' instead.
3219 *** M-x shell prompts for the shell path name if the default directory
3220 is a remote file name and neither the environment variable $ESHELL nor
3221 the variable `explicit-shell-file-name' is set.
3223 *** TAB is now bound to the standard `completion-at-point' command,
3224 which now implements the pcomplete rules for shell command completion.
3228 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3229 if the mail server supports them. This uses either built-in GnuTLS
3230 support, or the starttls.el library. Customize `smtpmail-stream-type'
3233 *** The variable `smtpmail-auth-credentials' has been removed.
3234 By default, the information is now stored in the file ~/.authinfo.
3235 This was the default value of smtpmail-auth-credentials. If you had
3236 customized smtpmail-auth-credentials to a list of user names and
3237 passwords, those settings are not used. During your first connection
3238 to the smtp server, Emacs will prompt for the user name and password,
3239 and offer to save them to ~/.authinfo. Or you can manually copy the
3240 credentials to ~/.authinfo. For example, if you had
3242 (setq smtpmail-auth-credentials
3243 '(("mail.example.org" 25 "jim" "s!cret")))
3245 then the equivalent line in ~/.authinfo would be
3247 machine mail.example.org port 25 login jim password s!cret
3249 See the auth-source manual for more information, e.g. on encrypting
3250 the credentials file.
3252 *** The variable `smtpmail-starttls-credentials' has been removed.
3253 If you had that set, you need to put
3255 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3257 in your ~/.authinfo file instead.
3259 *** SMTPmail defaults to using the address in the From: header as the
3260 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3261 to the address you wish to use instead.
3265 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3266 and `sql-oracle-scan-on'.
3268 *** New options controlling prompting for login parameters.
3269 Each supported product has a custom variable `sql-*-login-params',
3270 which is a list of the parameters to be prompted for before a
3271 connection is established.
3273 *** The command `sql-product-interactive' now takes a prefix argument,
3274 which causes it to prompt for an SQL product.
3276 *** Product-specific SQL interactive commands now take prefix arguments.
3277 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3278 given a prefix argument, prompt for a name for the SQL interactive
3279 buffer. This reduces the need for calling `sql-rename-buffer'.
3281 *** SQL interactive modes suppress command continuation prompts, and
3282 replace tabs with spaces. The first change impacts multiple line SQL
3283 statements entered with C-j between each line, statements yanked into
3284 the buffer and statements sent with `sql-send-*' functions. The
3285 second prevents the MySQL and Postgres interpreters from listing
3286 object name completions when sent text via `sql-send-*' functions.
3288 *** New command `sql-connect' starts a predefined SQLi session,
3289 using the login parameters from `sql-connection-alist'.
3291 *** New "Save Connection" menu item in SQLi buffers.
3292 This gathers the login params specified for the SQLi session, if it
3293 was not started by a connection, and saves them as a new connection.
3295 *** New commands for listing database objects and details:
3296 sql-list-all and sql-list-table.
3298 *** An API for manipulating SQL product definitions has been added.
3302 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3306 *** New inline access method "ksu" (kerberized su).
3308 *** The following access methods are discontinued: "ssh1_old",
3309 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3311 *** The user option `remote-file-name-inhibit-cache' controls whether
3312 remote file attributes are cached for better performance.
3314 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3315 default value to "".
3317 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3318 for remote machines which support SELinux.
3320 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3321 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3322 the degree of parallelism.
3324 ** VC and related modes
3326 *** Support for pulling on distributed version control systems.
3327 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3328 supported (currently with Bzr, Git, and Mercurial), to update the
3329 current branch and working tree. A prefix argument means to prompt
3330 the user for specifics, e.g. a pull location.
3332 *** `vc-update' is now an alias for `vc-pull'.
3334 *** Support for merging on distributed version control systems.
3335 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3336 is supported (currently with Bzr, Git, and Mercurial), to merge
3337 changes from another branch into the current one. It prompts for
3338 specifics, e.g. a merge source.
3340 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3341 shows a diff while querying the user. It defaults to t.
3343 *** Log entries in some Log View buffers can be toggled to display a
3344 longer description by typing RET (log-view-toggle-entry-display).
3345 This is currently supported for Bzr, Git, and Mercurial (to support
3346 another backend, define a `log-view-expanded-log-entry-function').
3347 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3348 use this to display the full log entry for the revision at point.
3350 *** New command `vc-ediff' allows visual comparison of two revisions
3351 of a file similar to `vc-diff', but using ediff backend.
3353 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3354 this was not advertised at the time.
3356 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3357 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3358 this was not advertised at the time.
3364 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3366 *** partial-completion-mode (complete.el) is obsolete.
3367 You can get a comparable behavior with:
3368 (setq completion-styles '(partial-completion initials))
3369 (setq completion-pcm-complete-word-inserts-delimiters t)
3371 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3373 *** pgg is obsolete (use EasyPG instead).
3375 *** sregex.el is obsolete, since rx.el is a strict superset.
3377 *** s-region.el and pc-select.el are obsolete.
3378 They are superseded by shift-select-mode, enabled by default since 23.1.
3380 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3384 *** The Landmark game is now invoked with `landmark', not `lm'.
3385 Its functions and variables have been similarly renamed.
3387 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3388 (This interfered with cua-mode.)
3390 *** f90.el has some support for Fortran 2008 syntax.
3392 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3394 *** New command `nato-region' converts text to NATO phonetic alphabet.
3397 * New Modes and Packages in Emacs 24.1
3399 ** Occur Edit mode applies edits made in *Occur* buffers to the
3400 original buffers. It is bound to "e" in Occur mode.
3402 ** New global minor mode electric-pair-mode.
3403 When enabled, typing an open parenthesis automatically inserts the
3404 matching closing one.
3406 ** New global minor mode electric-indent-mode.
3407 When enabled, typing certain characters triggers reindentation.
3408 Major modes wishing to use this can set electric-indent-chars or
3409 electric-indent-functions.
3411 ** New global minor mode electric-layout-mode.
3412 When enabled, typing certain characters automatically inserts newlines.
3413 Major modes wishing to use this can set electric-layout-rules.
3415 ** tabulated-list.el provides a generic major mode for tabulated data,
3416 from which other modes can be derived.
3418 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3420 ** secrets.el is an implementation of the Secret Service API, an
3421 interface to password managers like GNOME Keyring or KDE Wallet. The
3422 Secret Service API requires D-Bus for communication. The command
3423 `secrets-show-secrets' offers a buffer with a visualization of the
3426 ** notifications.el provides an implementation of the Desktop
3427 Notifications API. It requires D-Bus for communication.
3429 ** soap-client.el supports access to SOAP web services from Emacs.
3430 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3432 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3434 ** New emacs-lock.el package.
3435 The previous version has been moved to obsolete/old-emacs-lock.el.
3436 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3437 against exiting Emacs and killing the buffer can be set separately.
3438 The mechanism for automatically turning off protection for buffers
3439 with dead inferior processes has been generalized.
3442 * Incompatible Lisp Changes in Emacs 24.1
3444 ** Passing a nil argument to a minor mode function call now ENABLES
3445 the minor mode unconditionally. This is so that you can write e.g.
3447 (add-hook 'text-mode-hook 'foo-mode)
3449 to enable foo-mode in Text mode buffers, removing the need for
3450 `turn-on-foo-mode' style functions. This affects all mode commands
3451 defined by `define-minor-mode'. If called interactively, the mode
3452 command still toggles the minor mode.
3454 ** The return value of `backup-buffer' has changed.
3455 It is now a list of three elements, where the second element is a list
3456 describing the original file's SELinux context. If Emacs or the
3457 system lacks SELinux support, the context list is (nil nil nil nil).
3458 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3460 ** `char-direction-table' and the `char-direction' function were deleted.
3461 They were buggy and inferior to the new support of bidirectional
3462 editing introduced in Emacs 24. If you need the bidirectional
3463 properties of a character, use `get-char-code-property' with the last
3464 argument `bidi-class'.
3466 ** `copy-directory' now copies the source directory as a subdirectory
3467 of the target directory, if the latter is an existing directory. The
3468 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3469 the contents directly into a pre-existing target directory.
3471 ** For mouse click input events in the text area, the Y pixel
3472 coordinate in the POSITION list now counts from the top of the text
3473 area, excluding any header line. Previously, it counted from the top
3476 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3477 been further reduced. Now a backquote not followed by a space is
3478 always treated as a "new-style" backquote. Please remove all
3479 "old-style" backquotes from your code. If your code uses backquotes
3480 as documented in the Elisp manual, and compiles without warning, then
3481 you have nothing to do in this regard. Code not following the
3482 appropriate conventions may fail to compile.
3484 The most common cause of trouble seems to be an old-style backquote
3485 followed by a newline. Another cause of trouble is vector notation
3486 for key sequence notation: instead of [(control ,)] and [(control ')],
3487 you should write [(control ?,)] and [(control ?')], which will work in
3490 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3491 was not advertised at the time. The function `custom-initialize-delay'
3492 replaced all known uses.
3494 ** `view-buffer' now treats special mode-class in the same way that
3495 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3496 major mode is special).
3498 ** Menu and tool bar changes
3500 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3501 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3502 With these alist entries omitted, `make-frame' checks the value of the
3503 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3504 a menu-bar or tool-bar, respectively. If the alist entries are added,
3505 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3507 *** The menu bar bindings's caches are not used any more.
3508 Use (where-is-internal <def> nil t) instead.
3510 ** Regions created by mouse dragging are now normal active regions,
3511 similar to those created by shift-selection (see Selection changes
3512 above). In previous Emacs versions, these regions were delineated by
3513 `mouse-drag-overlay'; that variable has been removed.
3515 ** The fourth argument of `filter-buffer-substring' has been removed.
3516 If you want to remove text properties from the final result, simply
3517 pass the result through substring-no-properties.
3519 ** cl.el no longer provides `cl-19'.
3521 ** The following obsolete functions and aliases have been removed
3522 (the appropriate new function is given in parentheses; "not needed"
3523 means you can just remove all calls to the function in question):
3525 *** `comint-kill-output' (`comint-delete-output')
3526 *** `decompose-composite-char' (`char-to-string')
3527 *** `outline-visible' (`outline-invisible-p')
3528 *** `internal-find-face' (`facep')
3529 *** `internal-get-face' (`facep and check-face')
3530 *** `frame-update-faces' (not needed)
3531 *** `frame-update-face-colors' (`frame-set-background-mode')
3532 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3533 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3534 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3535 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3536 *** `x-make-font-unbold' (`make-face-unbold')
3537 *** `x-make-font-unitalic' (`make-face-unitalic')
3538 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3539 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3540 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3541 *** `char-bytes' (== 1)
3542 *** `isearch-return-char' (`isearch-printing-char')
3543 *** `make-local-hook' (not needed)
3544 *** `set-screen-height' (`set-frame-height')
3545 *** `set-screen-width' (`set-frame-width')
3547 ** The following obsolete variables and varaliases have been removed
3548 (the appropriate new variable is given in parentheses):
3550 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3551 *** `vc-header-alist' (`vc-BACKEND-header')
3552 *** `directory-sep-char' (== ?/)
3553 *** `font-lock-defaults-alist' (`font-lock-defaults')
3554 *** `e' (`float-e').
3556 ** The following obsolete files were removed:
3557 sc.el, x-menu.el, rnews.el, rnewspost.el
3559 ** The format of the finder-inf.el file has changed, since the Finder
3560 mechanism is now based on the package system. The variable
3561 `finder-package-info' is replaced by `package--builtins' and
3562 `finder-keywords-hash'.
3564 ** When generating autoloads, `update-directory-autoloads' no longer
3565 assumes every inspected file is in your `load-path'. It instead
3566 generates relative names according to the current `load-path'.
3569 * Lisp Changes in Emacs 24.1
3571 ** Code can now use lexical scoping by default instead of dynamic scoping.
3572 The `lexical-binding' variable enables lexical scoping for local
3573 variables. It is typically set via a file-local variable in the first
3574 line of the file, in which case it applies to all the code in that
3577 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3578 binding instead of the old dynamic binding mode.
3580 *** Lexically scoped interpreted functions are represented with a new form
3581 of function value which looks like (closure ENV ARGS &rest BODY).
3583 *** New macro `letrec' to define recursive local functions.
3585 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3586 So do `defcustom' and other forms that call `defvar' as a subroutine.
3588 *** New function `special-variable-p' to check whether a variable is
3589 declared as dynamically bound.
3591 *** The form ((lambda ...) ...) is deprecated.
3593 ** An Emacs Lisp testing tool is now included.
3594 Emacs Lisp developers can use this tool to write automated tests for
3595 their code. See the ERT info manual for details.
3597 ** Changes for bidirectional display and editing
3599 *** New function `current-bidi-paragraph-direction'.
3600 This returns the base direction of the paragraph at point.
3602 *** New function `bidi-string-mark-left-to-right'.
3603 Given a string containing characters from right-to-left scripts, this
3604 function returns another string which can be safely inserted into a
3605 buffer, such that any following text will be always displayed to the
3606 right of that string. (This works by appending an invisible Unicode
3607 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3609 This is useful when the buffer has overall left-to-right paragraph
3610 direction and you need to insert a string whose contents are not known
3611 in advance, without disrupting the layout of the line.
3615 *** Window tree functions are accessible in Elisp.
3616 Functions are provided to return the parent, siblings or child windows
3617 of any window including internal windows (windows not associated with a
3618 buffer) in the window tree.
3620 **** New function `window-valid-p' gives non-nil for live and internal
3623 **** Window manipulation can deal with internal windows.
3624 Many window handling functions like `split-window', `delete-window', or
3625 `delete-other-windows' as well as the window resizing functions can now
3626 act on any window including internal ones.
3628 *** window-total-height/-width vs window-body-height/-width.
3629 The function `window-height' has been renamed to `window-total-height'
3630 and `window-width' has been renamed to `window-body-width'. The old
3631 names are provided as aliases. Two new functions `window-total-width'
3632 and `window-body-height' are provided.
3634 *** Window parameters specific to window handling functions.
3635 For each window you can specify a parameter to override the default
3636 behavior of a number of functions like `split-window', `delete-window'
3637 and `delete-other-windows'. The variable `ignore-window-parameters'
3638 allows to ignore processing such parameters.
3640 *** New semantics of third argument of `split-window'.
3641 The third argument of `split-window' has been renamed to SIDE and can be
3642 set to any of the values 'below, 'right, 'above, or 'left to make the
3643 new window appear on the corresponding side of the window that shall be
3644 split. Any other value of SIDE will cause `split-window' to split the
3645 window into two side-by-side windows as before.
3647 *** Window resizing functions.
3648 A new standard function for resizing windows called `window-resize' has
3649 been introduced. This and all other functions for resizing windows no
3650 longer delete any windows when they become too small.
3652 *** Deleting the selected window now selects the most recently selected
3653 live window on that frame instead.
3655 *** `adjust-window-trailing-edge' adjustments.
3656 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3657 is able to resize other windows if a window adjacent to the trailing
3658 edge cannot be shrunk any more. This makes its behavior more similar to
3659 that of Emacs 21 without compromising, however, its inability to delete
3660 windows which was introduced in Emacs 22.
3662 *** Window-local buffer lists.
3663 Windows now have local buffer lists. This means that removing a buffer
3664 from display in a window will preferably show the buffer previously
3665 shown in that window with its previous window-start and window-point
3666 positions. This also means that the same buffer may be automatically
3667 shown twice even if it already appears in another window.
3669 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3670 which if non-nil requires the buffer to be displayed in the currently
3671 selected window, signaling an error otherwise. If nil, another window
3672 can be used, e.g. if the selected one is strongly dedicated.
3674 *** `split-window-vertically' and `split-window-horizontally' renamed
3675 to `split-window-below' and `split-window-right' respectively.
3676 The old names are kept as aliases.
3680 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3681 named ACTION, and takes a display action of the same form as
3682 `display-buffer-base-action' (see Changes, above). A non-nil,
3683 non-list value is treated specially, as the old meaning.
3685 **** New variable `display-buffer-overriding-action'.
3687 **** The procedure of `display-buffer' etc. to choose a window is
3688 determined by combining `display-buffer-overriding-action',
3689 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3690 and `display-buffer-fallback-action'. The second and fourth of these
3691 are user-customizable variables.
3693 See the docstring of `display-buffer' for details.
3695 *** New functions `window-state-get' and `window-state-put'.
3696 These functions allow to save and restore the state of an arbitrary
3697 frame or window as an Elisp object.
3701 *** New variable `completion-extra-properties' used to specify extra
3702 properties of the current completion:
3703 - :annotate-function, same as the old completion-annotate-function.
3704 - :exit-function, function to call after completion took place.
3706 *** Functions on `completion-at-point-functions' can return any of the
3707 properties valid for `completion-extra-properties'.
3709 *** `completion-annotate-function' is obsolete.
3711 *** New `metadata' method for completion tables. The metadata thus returned
3712 can specify various details of the data returned by `all-completions':
3713 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3714 used to select a style in completion-category-overrides.
3715 - `annotation-function' to add annotations in *Completions*.
3716 - `display-sort-function' to specify how to sort entries in *Completions*.
3717 - `cycle-sort-function' to specify how to sort entries when cycling.
3719 *** `minibuffer-local-filename-must-match-map' is not used any more.
3720 Instead, the bindings in `minibuffer-local-filename-completion-map'
3721 are combined with `minibuffer-local-must-match-map'.
3723 *** New variable `completing-read-function' allows overriding the
3724 behavior of `completing-read'.
3726 ** `glyphless-char-display' can now distinguish between graphical and
3727 text terminal display, via a char-table entry that is a cons cell.
3729 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3730 Instead, the offending function is removed.
3734 *** New function `run-hook-wrapped' for running an abnormal hook by
3735 passing the hook functions as arguments to a "wrapping" function.
3736 Like `run-hook-with-args-until-success', it stops at the first
3737 non-nil return value.
3739 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3740 set of "wrapping" filters, similar to around advice.
3741 (A version of this macro was actually added in Emacs 23.2 but was not
3742 advertised at the time.)
3746 *** New macro `condition-case-unless-debug' (this was actually added in
3747 Emacs 23.1 as condition-case-no-debug, but not advertised)
3749 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3751 *** Variable `stack-trace-on-error' removed.
3753 *** The debugger can now "continue" from an error, which means it will
3754 jump to the error handler as if the debugger had not been invoked
3755 instead of jumping all the way to the top-level.
3757 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3758 This can be useful when `inhibit-quit' is set.
3760 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3761 named Emacs server instances.
3763 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3764 to redirect STDOUT to a file.
3766 ** The function `format-time-string' now supports the %N directive,
3767 for higher-resolution time stamps.
3769 ** New input reading functions
3771 *** New function `read-char-choice' reads a restricted set of
3772 characters, discarding any inputs not inside the set.
3774 *** The command `read-color' now requires a match for a color name
3775 or RGB triplet, instead of signaling an error if the user provides
3778 **** `facemenu-read-color' is now an alias for `read-color'.
3780 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3781 The variable is now used to load all kind of supported dynamic libraries,
3782 not just image libraries. The previous name is still available as an
3785 ** Syntax parsing changes
3787 *** New variable `syntax-propertize-function'.
3788 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3789 This allows syntax-table properties to be set independently from font-lock:
3790 just call syntax-propertize to make sure the text is propertized.
3791 Together with this new variable come a new hook
3792 syntax-propertize-extend-region-functions, as well as two helper functions:
3793 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3794 as-is; and syntax-propertize-rules which provides a new way to specify
3797 *** Syntax tables support a new "comment style c" additionally to style b.
3799 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3801 ** frame-local variables cannot be let-bound any more.
3803 ** Major and minor mode changes
3805 *** `set-auto-mode' now respects mode: local variables at the end of files,
3806 as well as those in the -*- line.
3808 *** `prog-mode' is a new major mode from which programming modes
3811 **** `prog-mode-hook' can be used to enable features for programming
3812 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3813 on-the-fly spell checking for comments and strings.
3815 *** New hook `change-major-mode-after-body-hook', run by
3816 `run-mode-hooks' just before any other mode hooks.
3818 *** Enabled globalized minor modes can be disabled in specific major modes.
3819 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3820 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3822 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3824 ** File-handling changes
3826 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3827 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3828 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3829 argument is supplied (see Trash changes, above).
3831 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3833 ** Tool-bars can display separators.
3834 Tool-bar separators are handled like menu separators in menu-bar maps,
3835 i.e. via menu entries of the form `(menu-item "--")'.
3839 *** Animated images support (currently animated gifs only).
3841 **** `image-animated-p' returns non-nil if an image can be animated.
3843 **** `image-animate' animates a supplied image spec.
3845 **** `image-animate-timer' returns the timer object for an image that
3848 *** `image-extension-data' has been renamed to `image-metadata'.
3849 The old name is an obsolete alias to the new one.
3851 *** Image mode can view any image type that ImageMagick supports.
3852 This requires Emacs to be built with ImageMagick support.
3854 **** New function `imagemagick-types', defined if ImageMagick support
3855 is enabled, returns a list of image file extensions that your
3856 ImageMagick installation supports.
3858 **** New function `imagemagick-register-types' enables ImageMagick
3859 image types in Image mode and in `create-image' and other helper
3862 **** New option `imagemagick-types-inhibit' excludes certain
3863 ImageMagick image types from `imagemagick-register-types'.
3865 **** With ImageMagick support, there are extra Image mode commands to
3866 resize and rotate images: `image-transform-fit-to-height',
3867 `image-transform-fit-to-width', `image-transform-set-rotation', and
3868 `image-transform-set-scale'.
3870 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3871 passes it to the mail user agent function. This argument specifies an
3872 action for returning to the caller after finishing with the mail. For
3873 example, this is used by Rmail to optionally delete a mail window.
3875 ** XML and HTML parsing
3876 If Emacs is compiled with libxml2 support, there are two new
3877 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3878 and `libxml-parse-xml-region' (which parses XML). Both return an
3879 Emacs Lisp parse tree.
3881 ** Networking and encryption changes
3883 *** `open-network-stream' can now be used to open an encrypted stream.
3884 It now accepts an optional `:type' parameter for initiating a TLS
3885 connection, directly or via STARTTLS. To do STARTTLS, additional
3886 parameters (`:end-of-command', `:success', `:capabilities-command')
3887 must also be supplied.
3889 *** New library gnutls.el.
3890 The new function `gnutls-available-p' returns non-nil if Emacs is
3891 built with GnuTLS support. The main entry points are
3892 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3893 these functions through `open-network-stream', because that can
3894 upgrade connections through STARTTLS opportunistically or use plain
3895 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3898 *** New primitive `secure-hash' that supports many secure hash algorithms:
3899 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3900 sha1.el has been removed. The `sha1' feature is provided by default.
3904 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3906 ** Progress reporters can now "spin".
3907 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3908 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3909 time you call `progress-reporter-update' on that progress reporter,
3910 with a nil or omitted VALUE argument, the reporter message is
3911 displayed with a "spinning bar".
3913 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3914 being reverted, even if the buffer has a local `revert-buffer-function'.
3916 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3917 If delayed-warnings-list is non-nil, the command loop calls
3918 `delayed-warnings-hook' after `post-command-hook'. At present, this
3919 is only used by Emacs on some platforms to display warnings during
3920 startup, which might otherwise not be noticed. This uses the
3921 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3923 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3925 ** New function `make-composed-keymap' that constructs a new keymap
3926 from multiple input maps. You can use this to make a keymap that
3927 inherits from multiple maps, eg:
3928 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3930 ** New function `string-prefix-p'.
3931 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3933 ** New reader macro ## that stands for the empty symbol.
3934 This means that the empty symbol can now be read back. Also, #: by itself
3935 (when not immediately followed by a possible symbol character) stands for
3936 an empty uninterned symbol.
3938 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3940 ** The following functions and variables are obsolete:
3942 *** `tooltip-use-echo-area' is obsolete.
3943 Rather than setting this to t, disable Tooltip mode instead.
3945 *** buffer-substring-filters is obsolete.
3946 Use `filter-buffer-substring-functions' instead.
3948 *** `byte-compile-disable-print-circle' is obsolete.
3950 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3951 Use `post-command-hook' instead.
3953 *** `font-lock-maximum-size' is obsolete.
3956 * Changes in Emacs 24.1 on Non-Free Operating Systems
3958 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3959 and also when HOME is set to C:\ by default.
3961 ** New configure.bat options
3963 *** --enable-checking builds Emacs with extra runtime checks.
3965 *** --distfiles specifies files to be included in binary distribution.
3967 *** --without-gnutls disables automatic GnuTLS detection.
3969 *** --lib for general library linkage, works with the USER_LIBS build variable.
3971 ** New make target `dist' to create binary distribution for MS Windows.
3973 ** The Lisp function `w32-default-color-map' is now obsolete.
3974 (It is only used internally in the Emacs C code.)
3976 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3977 reappear on mouse-over. (Requires OS X 10.6 or later.)
3979 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3980 other platforms, rather than inserting its contents into the buffer.
3983 ----------------------------------------------------------------------
3984 This file is part of GNU Emacs.
3986 GNU Emacs is free software: you can redistribute it and/or modify
3987 it under the terms of the GNU General Public License as published by
3988 the Free Software Foundation, either version 3 of the License, or
3989 (at your option) any later version.
3991 GNU Emacs is distributed in the hope that it will be useful,
3992 but WITHOUT ANY WARRANTY; without even the implied warranty of
3993 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3994 GNU General Public License for more details.
3996 You should have received a copy of the GNU General Public License
3997 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
4002 paragraph-separate: "[
\f]*$"