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
94 ** New function `zlib-decompress-region', which decompresses gzip- and
95 zlib-format compressed data using built-in zlib support, if available.
98 ** New option `gnutls-verify-error', if non-nil, means that Emacs
99 should reject SSL/TLS certificates that GnuTLS determines as invalid.
100 (This option defaults to nil at present, but this is expected to change
101 in a future release.)
104 ** Emacs now supports menus on text-mode terminals.
105 If the terminal supports a mouse, clicking on the menu bar, or on
106 sensitive portions of the mode line or header line, will drop down the
107 menu defined at that position. Likewise, clicking C-mouse-2 or
108 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
111 If the text terminal does not support a mouse, you can activate the
112 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
114 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
115 customize the option `tty-menu-open-use-tmm' to a non-nil value.
116 (Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
120 ** The *Messages* buffer is created in `messages-buffer-mode',
121 a new major mode, with read-only status. Any code that might create
122 the *Messages* buffer should call the function `messages-buffer' to do
123 so and set up the mode.
126 ** Emacs can now support ACLs (access control lists).
127 This requires a suitable support library to be found at build time.
128 On GNU/Linux, the POSIX ACL interface is used via libacl.
129 On MS-Windows, the NT Security APIs are used to emulate the POSIX interface.
132 *** Emacs preserves the ACL entries of files when backing up.
134 *** New functions `file-acl' and `set-file-acl' get and set the ACL
137 ** Multi-monitor support has been added.
140 *** New functions `display-monitor-attributes-list' and
141 `frame-monitor-attributes' can be used to obtain information about
142 each physical monitor on multi-monitor setups.
144 *** The functions `display-pixel-width' and `display-pixel-height' now
145 behave consistently among the platforms: they return the pixel width
146 or height for all physical monitors associated with the given display
147 as if they were on X11. To get information for each physical
148 monitor, use the new functions above. Similar notes also apply to
149 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
150 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
153 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
154 You can change the default by customizing `blink-cursor-blinks'.
157 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
158 This affects View mode, etc.
163 *** The command `apropos-variable' is renamed to `apropos-user-option'.
164 `apropos-user-option' shows all user options while `apropos-variable'
165 shows all variables. When called with a universal prefix argument,
166 the two commands swap their behaviors. When `apropos-do-all' is
167 non-nil, they output the same results.
170 *** The key `?' now describes prefix bindings, like `C-h'.
173 *** The command `describe-function' has been extended for EIEIO.
174 Running it on constructors will show a full description of the
175 generated class. For generic functions, it will show all
176 implementations together with links to the source. The old commands
177 `describe-class', `describe-constructor' and `describe-generic' were
181 *** The function `quail-help' is no longer an interactive command.
182 Use `C-h C-\' (`describe-input-method') instead.
187 *** ImageMagick images now support the :max-width and :max-height keywords.
190 *** When using `create-image' with image data, you can pass a :format
191 attribute (via the property-list argument) in order to help
192 ImageMagick detect the image type. The value should be a MIME
193 content-type that is found in the new variable `image-format-suffixes'.
195 ** Frame and window changes
198 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
199 bound to <f11> and M-<f10>, respectively.
202 *** New hooks `focus-in-hook', `focus-out-hook'.
203 These are normal hooks run when an Emacs frame gains or loses input focus.
205 *** Emacs can now change frame sizes in units of pixels, rather than
206 text rows or columns. When maximizing a frame or making it fullscreen,
207 remaining extra pixels are no longer given to the minibuffer, the rightmost
208 fringe, or other unusable space, but are distributed among the text
209 areas of the frame's windows. If the new option `frame-resize-pixelwise'
210 is non-nil, all frame size changes happen pixelwise and set the
211 corresponding size hints for the window manager.
213 *** Emacs can now change window sizes in units of pixels.
214 Mouse-dragging a mode line or window divider now changes the size of
215 adjacent windows pixelwise. If the new option `window-resize-pixelwise'
216 is non-nil, functions like `balance-windows-area' and `fit-window-to-buffer'
217 resize windows pixelwise. Most functions for changing or accessing
218 window sizes now have an additional argument that allows changes to apply,
219 or values to be returned, in pixels instead of lines/columns.
221 *** Emacs can now draw dividers between adjacent windows. To put
222 dividers between side-by-side/vertically stacked windows customize the
223 frame parameters `right-divider-width' and `bottom-divider-width' to
224 some positive integer. You can drag dividers with the mouse (they show
225 a corresponding cursor when the mouse hovers over them). You can change
226 the appearance of dividers by customizing the faces `window-divider',
227 `window-divider-first-pixel', and `window-divider-last-pixel'. The last
228 two are useful to provide a 3D effect, or to better distinguish dividers
229 from surrounding display objects.
231 *** New functions are provided to return the pixel sizes of window
232 components, namely `window-scroll-bar-width', `window-mode-line-height'
233 `window-header-line-height', `window-right-divider-width' and
234 `window-bottom-divider-width'.
236 *** The new function `window-text-pixel-size' returns the size of the
237 text of a window's buffer in pixels. This allows functions like
238 `fit-frame-to-buffer' and `fit-window-to-buffer' to accurately fit a
239 window to its buffer as it will be displayed.
241 *** `fit-window-to-buffer' can now resize windows horizontally.
242 This behavior is controlled by the new option
243 `fit-window-to-buffer-horizontally'.
245 *** `fit-frame-to-buffer' can now fit frames in both directions.
246 This behavior is controlled by the option `fit-frame-to-buffer' which
247 tells in which direction(s) the frame shall be fit. The new options
248 `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes' allow to
249 control the size of the frame and its position on screen.
251 *** Temp Buffer Resize Mode can now adjust height and width of windows
252 and frames. `temp-buffer-resize-mode' is now able to adjust the height
253 and the width of a window displaying a temporary buffer. The new option
254 `temp-buffer-max-width' allows to control the width of temporary buffer
255 windows. Moreover, if the new option `fit-frame-to-buffer' is non-nil
256 and the buffer appears in the root window of a frame, Temp Buffer Resize
257 Mode will try to adjust width and/or height of the frame.
260 *** `split-window' is now a non-interactive function, not a command.
261 As a command, it was a special case of `C-x 2' (`split-window-below'),
262 and as such superfluous. After being reimplemented in Lisp, its
263 interactive form was mistakenly retained.
266 *** The functions `window-size' and `window-total-size' now have an
267 optional argument to return a rounded size value.
270 *** `window-state-put' now allows to put a window state into internal
274 *** New option `scroll-bar-adjust-thumb-portion'.
275 Available only on X, this option allows to control over-scrolling
276 using the scroll bar (i.e. dragging the thumb down even when the end
277 of the buffer is visible).
280 *** New basic action function `display-buffer-in-previous-window' has
281 `display-buffer' display a buffer in a window previously showing that
285 *** New basic action function `display-buffer-at-bottom' has
286 `display-buffer' choose or make a window at the bottom of the selected
289 *** New display action function `display-buffer-no-window' to not
290 display the buffer in a window.
292 *** New display action alist entry `allow-no-window' to indicate the
293 caller of `display-buffer' is ready to handle the case of not
294 displaying the buffer in a window.
296 ** Lisp evaluation changes
298 *** `eval-defun' on an already defined defcustom calls the :set function,
302 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
303 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
304 zero prefix argument. This disables truncation of lists in the output,
305 equivalent to setting `(eval-expression-)print-length' and
306 `(eval-expression-)print-level' to nil. Additionally, it causes integers
307 to be printed in other formats (octal, hexadecimal, and character).
310 *** New hook `eval-expression-minibuffer-setup-hook' run by
311 `eval-expression' on entering the minibuffer.
314 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
317 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
318 because it affects caching of paragraph scanning results as well.
319 There is no reason to set this to nil except for debugging purposes.
322 ** The option `set-mark-default-inactive' has been deleted.
323 This unfinished feature was introduced by accident in Emacs 23.1;
324 simply disabling Transient Mark mode does the same thing.
327 ** The default value of `comment-use-global-state' is now t,
328 and this variable has been marked obsolete.
331 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
332 and works for git too, if you fetch the repository notes.
335 ** New option `load-prefer-newer' affects how the `load' function chooses
336 the file to load. If this is non-nil, then when both .el and .elc
337 versions of a file exist, and the caller did not explicitly specify
338 which one to load, then the newer file is loaded. The default, nil,
339 means to always load the .elc file.
342 * Editing Changes in Emacs 24.4
344 ** Indentation changes
347 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
348 When invoked without a prefix argument, it now activates a transient
349 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
350 the text indentation in the region. Typing any other key resumes
351 normal editing behavior.
353 *** `electric-indent-mode' is enabled by default.
356 *** `tab-stop-list' is now implicitly extended to infinity by repeating
357 the last step. Its default value is changed to nil, which means a tab
358 stop every `tab-width' columns.
361 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
362 When called in succession, it cycles between spacing conventions:
363 one space, no spaces, original spacing.
366 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
367 a line after a one-letter word, which is an error in some typographical
368 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
371 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
373 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
374 Most commands are still unaware of it, but kill/yank do work on the rectangle.
377 ** New option `visual-order-cursor-movement'.
378 If this is non-nil, cursor motion with arrow keys will follow the
379 visual order of characters on the screen: <left> always moves to the
380 left, <right> always moves to the right, disregarding the surrounding
381 bidirectional context.
386 *** All interactive commands that read a register (`copy-to-register', etc.)
387 now display a temporary window after `register-preview-delay' seconds
388 that summarizes existing registers. To disable this, set that option to nil.
389 Interactive commands that read registers and want to make use of this
390 should use `register-read-with-preview' to read register names.
393 *** New command `frameset-to-register' bound to `C-x r f', replacing
394 `frame-configuration-to-register'. It offers similar functionality,
395 plus enhancements like the ability to restore deleted frames.
396 (`frame-configuration-to-register' still exists, but no longer has a
400 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
404 ** New command `delete-duplicate-lines'.
405 This searches the region for identical lines, and removes all but one
406 copy of each repeated line. The lines need not be sorted.
409 * Changes in Specialized Modes and Packages in Emacs 24.4
412 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
414 ~/.emacs.d/timelog replaces ~/.timelog
415 ~/.emacs.d/vip replaces ~/.vip
416 ~/.emacs.d/viper replaces ~/.viper
417 ~/.emacs.d/ido.last replaces ~/.ido.last
418 ~/.emacs.d/kkcrc replaces ~/.kkcrc
419 ~/.emacs.d/quickurls replaces ~/.quickurls
420 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
421 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
422 ~/.emacs.d/places replaces ~/.emacs-places
423 ~/.emacs.d/shadows replaces ~/.shadows
424 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
425 ~/.emacs.d/strokes replaces ~/.strokes
426 ~/.emacs.d/notes replaces ~/.notes
427 ~/.emacs.d/type-break replaces ~/.type-break
428 Also the following files used by the now obsolete otodo-mode.el:
429 ~/.emacs.d/todo-do replaces ~/.todo-do
430 ~/.emacs.d/todo-done replaces ~/.todo-done
431 ~/.emacs.d/todo-top replaces ~/.todo-top
433 ** Backtrace and debugger
436 *** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
437 display of local variables of the current stack frame.
440 *** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
441 the lexical environment when evaluating the code in the context at point
442 (and so allows you to access lexical variables).
445 *** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
448 ** Battery information can now be retrieved from BSD's `apm' utility.
451 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
453 ** Calendar and Diary
456 *** New faces `calendar-weekday-header', `calendar-weekend-header',
457 and `calendar-month-header'.
460 *** New option `calendar-day-header-array'.
463 *** New variable `diary-from-outlook-function', used by the command
464 `diary-from-outlook'.
467 *** The variable `calendar-font-lock-keywords' is obsolete.
472 *** Calc by default now uses the Gregorian calendar for all dates, and
473 uses January 1, 1 AD as its day number 1. Previously Calc used the
474 Julian calendar for dates before September 14, 1752, and it used
475 December 31, 1 BC as its day number 1; the new scheme is more
476 consistent with Calendar's calendrical system and day numbering.
479 *** The new option `calc-gregorian-switch' lets you configure if
480 (and when) Calc switches from the Julian to the Gregorian calendar.
483 *** Support for ISO 8601 dates.
489 **** The cpp-root project now supports executing a compile command.
490 It can be set through the new :compile-command slot or the
491 buffer-local variable `compile-command'.
493 **** Better selection of include directories for the 'linux' project.
494 Include directories now support out-of-tree build directories and
495 target architecture auto-detection.
499 **** Improved detection of used namespaces in current scope in C++.
501 **** Parsing of default values for variables and function arguments in C/C++.
502 They are also displayed by the summarize feature in the mode line.
504 **** Improved parsing of function pointers in C/C++.
505 This also includes parsing of function pointers as function arguments.
507 **** Parsing of C/C++ preprocessor macros that open new scope.
508 For example, this enables parsing of macros that open new namespaces.
510 **** Support for 'this' pointer in inline member functions in C++.
515 *** New macro `cl-tagbody'.
516 This executes statements while allowing for control transfer to labels.
519 *** letf is now just an alias for cl-letf.
524 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
525 Hence, you can now enable it independently from those modes, and from
526 `transient-mark-mode'.
529 *** `cua-highlight-region-shift-only' is now obsolete.
530 You can disable `transient-mark-mode' to get the same result.
533 *** CUA's rectangles can now be used without CUA by calling the command
534 `cua-rectangle-mark-mode'.
539 *** Support for completion, ElDoc, and Flycheck has been added.
542 *** The current CFEngine syntax is parsed from "cf-promises -s json".
543 There is a fallback syntax available if you don't have cf-promises or
544 if your version doesn't support that option. See option `cfengine-cf-promises'.
547 ** Delete Selection mode can now be used without Transient Mark mode.
552 *** `desktop-save-mode' by default now auto-saves an existing desktop file
553 after `desktop-auto-save-timeout'. To disable this, customize that option
557 *** `desktop-restore-frames', enabled by default, allows saving and
558 restoring the frame/window configuration (frameset). Additional options
559 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
560 and `desktop-restore-forces-onscreen' offer further customization.
563 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
564 such as file ownership or permissions, are visible.
567 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
568 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
569 The results display in the mode line.
571 ** Electric Pair mode
574 *** New option `electric-pair-preserve-balance', enabled by default.
575 If non-nil, pairing/skipping only kicks in when that help the balance
576 of parentheses and quotes, i.e. the buffer should end up at least as
579 You can further control this behavior by adjusting the predicates
580 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
583 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
584 In `electric-pair-mode', the commands `backward-delete-char' and
585 `backward-delete-char-untabify' are now bound to electric variants
586 that delete the closer when invoked between adjacent pairs.
589 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
590 In `electric-pair-mode', inserting a newline between adjacent pairs
591 opens an extra newline after point, which is indented if
592 `electric-indent-mode' is also set.
595 *** New option `electric-pair-skip-whitespace', enabled by default.
596 This controls if skipping over closing delimiters should jump over any
597 whitespace slack. Setting it to `chomp' makes it delete this
598 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
601 *** New variables control the pairing in strings and comments.
602 You can customize `electric-pair-text-pairs' and
603 `electric-pair-text-syntax-table' to tweak pairing behavior inside
604 strings and comments.
607 ** New EPA option `epa-mail-aliases'.
608 You can set this to a list of email address aliases that `epa-mail-encrypt'
609 should use to find keys.
612 ** New ERC option `erc-accidental-paste-threshold-seconds'.
613 If set to a number, this can be used to avoid accidentally pasting large
614 amounts of data into the ERC input.
617 ** New ERT macro `skip-unless' allows skipping ERT tests.
618 See the ERT manual for details.
623 *** `eshell' now supports visual subcommands and options.
624 Eshell has been able to handle "visual" commands (interactive,
625 non-line oriented commands such as top that require display
626 capabilities not provided by eshell) by running them in an Emacs
627 terminal emulator. See `eshell-visual-commands'.
629 This feature has been extended to subcommands and options that make a
630 usually line-oriented command a visual command. Typical examples are
631 "git log" and "git <command> --help", which display their output in a
632 pager by default. See `eshell-visual-subcommands' and
633 `eshell-visual-options'.
636 *** New Eshell-Tramp module.
637 External su and sudo commands are now the default; the internal,
638 Tramp-using variants can still be used by enabling the eshell-tramp
642 ** New F90 mode option `f90-smart-end-names'.
645 Icomplete is now more similar to Ido.
648 *** Icomplete by default now applies to all forms of minibuffer completion.
649 The variable `icomplete-with-completion-tables' (now a user option)
650 controls this. To restore the old behavior, set it back to
651 '(internal-complete-buffer).
654 *** You can navigate through and select completions using the keys
655 from `icomplete-minibuffer-map'.
658 *** The string that separates potential completions is now a customizable
659 option (`icomplete-separator'). The default is " | " rather than ",".
662 *** New face `icomplete-first-match'; and new options
663 `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
666 *** The option `icomplete-show-key-bindings' has been removed.
671 *** An Ido user manual is now included.
674 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
675 This means to use virtual buffers if the current ido input does not match
679 *** The variable `ido-decorations' can optionally have two new elements,
680 which are the brackets to use around the sole remaining completion.
685 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
686 visit the next image file and the previous image file in the same
687 directory, respectively.
690 *** New commands to show specific frames of multi-frame images.
691 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
692 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
695 *** New commands to speed up, slow down, or reverse animation.
696 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
697 speed up and slow down the animation. `a r' (`image-reverse-speed')
698 to reverse it and `a 0' (`image-reset-speed') to reset it.
701 *** The command `image-mode-fit-frame' deletes other windows.
702 When toggling, it restores the frame's previous window configuration.
703 It also has an optional frame argument, which can be used by Lisp
704 callers to fit the image to a frame other than the selected frame.
709 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
710 the symbol found near point.
713 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
714 will cycle through faces in `hi-lock-face-defaults' without prompting.
717 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
722 *** New Info face `info-index-match', used to highlight matches in index
723 entries displayed by `Info-index-next', `Info-virtual-index' and
727 *** The Info-edit command is obsolete. Editing Info nodes by hand
728 has not been relevant for some time.
733 *** New option `js-switch-indent-offset'.
736 *** Better indentation of multiple-variable declarations.
737 If a declaration spans several lines, variables on the following lines
738 are lined up to the first one.
741 *** Recognition and better indentation of continuations in array comprehensions.
744 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
749 *** Font locking for Texinfo comments and new keywords.
751 *** Completion in Octave file buffers.
755 *** Jump to definition.
757 *** Documentation lookup/search.
760 ** OPascal mode is the new name for Delphi mode
763 *** All delphi-* variables and functions have been renamed to opascal-*.
764 Obsolete aliases exist for those likely to have been used externally.
767 *** The option `delphi-newline-always-indents' has been removed.
768 Use `electric-indent-mode' instead.
771 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
776 *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
777 to filter the list of packages by a keyword.
780 *** In the `describe-package' buffer, there are now buttons listing the
781 keywords related to the package. Click on a button to see other packages
782 related to that keyword.
785 *** The format of `archive-contents' files, generated by package
786 repositories, has changed to allow a new (fifth) element in the data
787 vectors, containing an associative list with extra properties.
788 (For example, `describe-package' uses the `:url' extra property to
789 display a "Homepage" header.)
792 ** In Prolog mode, `prolog-use-smie' has been removed,
793 along with the non-SMIE indentation code.
798 *** The new command `remember-notes' creates a buffer that is saved on exit.
799 You can use it as a more permanent *scratch* buffer.
802 *** Remember can now store notes in separate files.
803 To use this, add `remember-store-in-files' to the `remember-handler-functions'
804 option. The files are saved in `remember-data-directory' using
805 names specified by `remember-directory-file-name-format'.
810 *** Customize `rmail-mbox-format' to influence some minor aspects of
811 how Rmail displays non-MIME messages.
814 *** The `unrmail' command now converts from BABYL to mboxrd format,
815 rather than mboxo. Customize `unrmail-mbox-format' to change this.
820 *** Improved syntax highlighting and indentation.
823 *** New `electric-indent-mode' integration.
826 *** New option `ruby-encoding-magic-comment-style'.
829 *** New option `ruby-custom-encoding-magic-comment-template'.
832 *** New option `ruby-align-to-stmt-keywords'.
835 *** New option `ruby-align-chained-calls'.
838 *** More Ruby file types have been added to `auto-mode-alist'.
840 ** Search and Replace
843 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
844 starts a symbol (identifier) incremental search forward with the
845 symbol found near point added to the search string initially.
848 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
849 and adds it to the search string.
852 *** `M-s i' in Isearch mode toggles whether search matches invisible text.
855 *** `query-replace' skips invisible text when `search-invisible' is nil,
856 and opens overlays with hidden text when `search-invisible' is `open'.
859 *** A negative prefix arg of replacement commands replaces backward.
860 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
861 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
864 *** By default, prefix arguments do not now terminate Isearch mode.
865 Set `isearch-allow-prefix' to nil to restore old behavior.
868 *** More Isearch commands accept prefix arguments, namely
869 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
873 *** Word search now matches whitespace at the beginning/end
874 of the search string if it contains leading/trailing whitespace.
875 In an incremental word search or when using a non-nil LAX argument
876 of `word-search-regexp', the lax matching can also match part of
877 the first word (in addition to the lax matching of the last word).
878 The same rules are now applied to the symbol search with the difference
879 that it matches symbols, and non-symbol characters between symbols.
882 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
885 ** The shell.el option `explicit-bash-args' includes --noediting by default.
886 All non-ancient Bash versions support this option.
891 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
894 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
896 ** SMIE indentation can be customized via `smie-config'.
897 Emacs can learn the appropriate indentation settings if you provide it
898 with an indented sample file.
903 *** Improved login monitoring and appropriate response to login failures.
904 New variable `sql-login-delay' defines maximum wait time for a connection.
907 SQL*Plus script placeholders are properly highlighted and identified
908 in `sql-placeholders-filter'. When starting SQL*Plus, `sql-oracle-options'
909 are passed before the logon parameter, as required. The default now
910 includes `-L', to limit the number of logon attempts per invocation.
913 ** New Term mode option `term-suppress-hard-newline'.
916 ** Todo mode has been rewritten and enhanced.
917 The Todo mode user manual describes all commands and most user
918 options. To support some of these features, a new file format is
919 used, which is incompatible with the old format; however, you can
920 convert old todo and done item files to the new format on initializing
921 the first new todo file, or at any later time with the provided
922 conversion command. The previous version of todo-mode.el has been
923 renamed to otodo-mode.el and is now obsolete. New features include:
925 *** Support for multiple todo files and archive files of done items.
927 *** Renaming, reordering, moving, merging, and deleting categories.
929 *** Sortable tabular summaries of categories and the item types they contain.
931 *** Cross-category lists of items filtered by specific criteria.
933 *** More fine-grained interaction with the Emacs diary, by being able to
934 decide for each todo item whether it appears in the Fancy Diary display.
936 *** Highly flexible new item insertion and item editing.
938 *** Moving items between categories, storing done items in their category
939 or in archive files, undoing or unarchiving done items.
941 *** Reprioritizing items by inputting a numerical priority.
943 *** Extensive customizability of operation and display, including many faces.
948 *** `trace-function' and `trace-function-background' no longer prompt for
949 the output buffer. Unless you use a prefix argument, they output to
953 *** With a prefix argument, `trace-function' and `trace-function-background'
954 will prompt for a "context". This is a Lisp expression, whose value at the
955 time the function is entered/exited is printed along with the function's
961 *** The experimental url syntax for remote file names has been removed.
964 *** New connection method "adb", which allows to access Android
965 devices by the Android Debug Bridge. The variable `tramp-adb-program'
966 can be used to adapt the path of the "adb" program, if needed.
969 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
970 "scpc" and "rsyncc" are discontinued. The ssh option
971 "ControlMaster=auto" is set automatically in all ssh-based methods,
972 when possible. See `tramp-use-ssh-controlmaster-options'.
975 *** Handlers for `file-acl' and `set-file-acl' for remote machines
976 which support POSIX ACLs.
979 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
980 for remote machines which support filesystem notifications.
983 ** New URL command `url-cookie-list' displays the current cookies,
984 and allows you to interactively remove cookies.
986 ** VC and related modes
989 *** In VC directory mode, `D' displays diffs between VC-controlled
990 whole tree revisions.
993 *** In VC directory mode, `L' lists the change log for the current VC
994 controlled tree in a window.
997 *** In VC directory mode, `I' shows a log of changes that will be
998 received with a pull operation.
1001 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
1002 under current version control system. When called with a prefix
1003 argument, you can remove a file from the ignored file list.
1008 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
1011 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
1014 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
1015 are obsolete. Customize the `woman-*' faces instead.
1017 ** Obsolete packages
1020 *** iswitchb.el; use icomplete-mode.
1023 *** longlines.el; use visual-line-mode.
1032 *** terminal.el; use term.el instead.
1035 *** the old version of todo-mode.el (renamed to otodo-mode.el).
1038 *** xesam.el (owing to the cancellation of the XESAM project).
1041 *** yow.el; use fortune.el or cookie1.el instead.
1044 * New Modes and Packages in Emacs 24.4
1047 ** New package `eww' is a built-in web browser.
1048 It is only available if Emacs is compiled with libxml2 support.
1051 ** New minor mode `superword-mode'.
1052 This overrides the default word motion commands to treat "symbol_words"
1053 as a single word, similar to what `subword-mode' does.
1056 ** New package nadvice.el offers lighter-weight advice facilities.
1059 *** add-function/remove-function, which can be used to add/remove code on any
1060 function-carrying place, such as process-filters or `<foo>-function' hooks.
1062 *** advice-add/advice-remove to add/remove a piece of advice on a named
1063 function, much like `defadvice' does.
1065 ** New package frameset.el.
1066 It provides a set of operations to save a frameset (the state of all
1067 or a subset of the existing frames and windows, somewhat similar to a
1068 frame configuration), both in-session and persistently, and restore it
1069 at some point in the future.
1072 ** New package filenotify.el provides an interface for file system
1073 notifications. It requires that Emacs be compiled with one of the
1074 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
1077 * Incompatible Lisp Changes in Emacs 24.4
1080 ** `kill-region' has lost its `yank-handler' optional argument.
1083 ** `(input-pending-p)' no longer runs other timers that are ready to run.
1084 The new optional CHECK-TIMERS parameter allows for the prior behavior.
1087 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
1090 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
1091 Some languages match those as »...«, and others as «...», so it is
1092 better for Emacs to stay neutral by default.
1095 ** In compiled Lisp files, the header no longer includes a timestamp.
1098 ** The default file coding for Emacs Lisp files is now utf-8.
1099 (See `file-coding-system-alist'.) In most cases, this change is
1100 transparent, but files that contain unusual characters without
1101 specifying an explicit coding system may fail to load with obscure
1102 errors. You should either convert them to utf-8 or add an explicit
1106 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
1107 It used to disable the minor mode, major mode, and text-property keymaps,
1108 whereas now it simply has higher precedence.
1111 ** Default process filters and sentinels are not nil any more.
1112 Instead they default to a function that does what the nil value used to do.
1115 ** `read-event' does not return decoded chars in ttys any more.
1116 As was the case in Emacs 22 and before, the decoding of terminal
1117 input, according to `keyboard-coding-system', is not performed in
1118 `read-event' any more. But unlike in Emacs 22, this decoding is still
1119 done before input-decode-map, function-key-map, etc.
1122 ** The option `inhibit-local-menu-bar-menus' has been removed.
1125 ** Frame-local variables that affect redisplay do not work any more.
1126 More specifically, redisplay does not bother to check for a frame-local
1127 value when looking up variables.
1130 ** nil and "unbound" are indistinguishable in `symbol-function'.
1131 `symbol-function' does not signal a `void-function' error any more.
1132 To determine if a symbol's function definition is void, use `fboundp'.
1135 ** `defadvice' does not honor the `freeze' flag and cannot advise
1136 special-forms any more.
1139 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1140 when lexical binding is enabled. Previously, VAR was bound to nil,
1141 which often led to spurious unused-variable warnings.
1144 ** The return value of `backup-buffer' has changed.
1145 The second argument is no longer an SELinux context, instead it is an
1146 alist of extended attributes as returned by the new function
1147 `file-extended-attributes'. The attributes can be applied to another
1148 file using `set-file-extended-attributes'.
1151 ** By default `copy-file' no longer copies file permission bits to an
1152 existing destination; and it sets the file permission bits of a newly
1153 created destination to those of the source, masked by the default file
1154 permissions. To copy the file permission bits, pass t as the
1155 PRESERVE-PERMISSIONS argument of `copy-file'.
1158 ** `visited-file-modtime' now returns -1 for nonexistent files.
1159 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1160 in the presence of files with negative time stamps.
1163 ** The cars of the elements in `interpreter-mode-alist' are now
1164 treated as regexps rather than literal strings.
1167 * Lisp Changes in Emacs 24.4
1170 ** The second argument of `eval' can now specify a lexical environment.
1173 ** New functions `special-form-p' and `macrop'.
1176 ** New macro `define-alternatives' can be used to define generic commands.
1177 Generic commands are interactive functions whose implementation can be
1178 selected among several alternatives, as a matter of user preference.
1181 ** If you give a symbol a `defalias-fset-function' property, `defalias'
1182 on that symbol will use the associated value as a function to call
1186 ** New variable `enable-dir-local-variables'.
1187 Directory-local variables are ignored if this is nil. This may be
1188 useful for modes that want to ignore directory-locals while still
1189 respecting file-local variables.
1192 ** New function `get-pos-property'.
1195 ** `read-regexp' now uses the new variable `read-regexp-defaults-function'
1196 as a function to call to provide default values.
1198 ** Completion changes
1201 *** The separator used by `completing-read-multiple' is now a regexp.
1202 The default `crm-separator' has been changed to allow surrounding spaces
1206 *** The `common-substring' argument of `display-completion-list',
1207 which has been documented as obsolete since Emacs 23.1, is now _really_
1208 obsolete, and no longer advertised. Instead either call
1209 `completion-hilit-commonality' to add the highlighting; or use
1210 `completion-all-completions', which returns highlighted strings.
1213 *** New function `completion-table-with-cache' is a wrapper for
1214 `completion-table-dynamic' that caches the result of the last lookup.
1217 *** New function `completion-table-merge' to combine several
1218 completion tables by merging their completions.
1221 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1222 display specified symbols as composed characters. E.g., in Emacs Lisp mode,
1223 this replaces the string "lambda" with the Greek lambda character.
1228 *** Functions to pop up menus and dialogs now work on all terminals,
1229 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1230 `message-box', `yes-or-no-p', etc.
1232 The function `display-popup-menus-p' will now return non-nil for a
1233 display or frame whenever a mouse is supported on that display or
1237 *** New hook `tty-setup-hook', run at the end of initializing a text terminal.
1240 *** The hook `term-setup-hook' is obsolete. It is entirely equivalent
1241 to `emacs-startup-hook'. See also the new `tty-setup-hook'.
1244 ** New hook `pre-redisplay-function'.
1247 ** New bool-vector set operation functions
1248 *** `bool-vector-exclusive-or'
1249 *** `bool-vector-union'
1250 *** `bool-vector-intersection'
1251 *** `bool-vector-set-difference'
1252 *** `bool-vector-not'
1253 *** `bool-vector-subsetp'
1254 *** `bool-vector-count-consecutive'
1255 *** `bool-vector-count-population'
1258 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1260 ** Error-handling changes
1263 *** New function `define-error'.
1266 *** `with-demoted-errors' takes an additional argument `format'.
1269 ** New macro `with-eval-after-load'.
1270 This is like the old `eval-after-load', but better behaved.
1273 ** New library subr-x.el with miscellaneous small utility functions
1274 *** `hash-table-keys'
1275 *** `hash-table-values'
1276 *** `string-blank-p'
1277 *** `string-empty-p'
1279 *** `string-reverse'
1280 *** `string-trim-left'
1281 *** `string-trim-right'
1283 *** `string-remove-prefix'
1284 *** `string-remove-suffix'
1287 ** Obsoleted functions
1290 *** `lisp-complete-symbol'
1291 *** `field-complete'
1292 *** `minibuffer-completion-contents'
1293 *** `isearch-nonincremental-exit-minibuffer'
1294 *** `isearch-filter-visible'
1295 *** `generic-make-keywords-list'
1296 *** `get-upcase-table' (use `case-table-get-table' instead).
1298 ** `with-wrapper-hook' is obsoleted by `add-function'.
1299 The few hooks that used with-wrapper-hook are replaced as follows:
1300 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1301 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1302 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1305 ** `byte-compile-interactive-only-functions' is now obsolete.
1306 To specify that a command should only be called interactively, give it
1307 a non-nil `interactive-only' property.
1310 ** `split-string' now takes an optional argument TRIM.
1311 The value, if non-nil, is a regexp that specifies what to trim from
1312 the start and end of each substring.
1315 ** New function `string-suffix-p'.
1317 ** File-handling changes
1320 *** Support for filesystem notifications.
1321 Emacs now supports notifications of filesystem changes, such as
1322 creation, modification, and deletion of files. This requires the
1323 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1324 MS-Windows systems, this is supported for Windows XP and newer
1328 *** The 9th element returned by `file-attributes' is now unspecified.
1329 Formerly, it was t if the file's gid would change if file were deleted
1330 and recreated. This value has been inaccurate for years on many
1331 platforms, and nobody seems to have noticed or cared.
1334 *** The 6th argument to `copy-file' has been renamed to
1335 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1336 Unix file permission bits as well as SELinux context.
1339 *** The function `file-ownership-preserved-p' now has an optional
1340 argument GROUP which causes it check for file group too. This can be
1341 used in place of the 9th element of `file-attributes'.
1344 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1345 argument, with the same interpretation as the returned value of
1346 `visited-file-modtime'.
1348 ** Autorevert changes
1351 *** If Emacs is compiled with file notification support, notifications
1352 are used instead of checking the time stamp of the files. You can
1353 disable this by setting the user option `auto-revert-use-notify' to
1354 nil. Alternatively, a regular expression of directories to be
1355 excluded from file notifications can be specified by
1356 `auto-revert-notify-exclude-dir-regexp'.
1359 *** The new user option `auto-revert-remote-files' enables reversion
1360 of remote files when set to non-nil.
1365 *** The function `face-spec-set' is now like `setq' for face specs.
1366 Its third arg now accepts values specifying a face spec type (defface,
1367 custom, or override spec), and the relevant spec is set accordingly.
1370 *** New function `add-face-text-property', which can be used to
1371 conveniently prepend/append new face properties.
1373 *** Face specs set via Custom themes now replace the `defface' spec
1374 rather than inheriting from it (as do face specs set via Customize).
1377 *** New face characteristic (supports :underline (:style wave))
1378 specifies whether or not the terminal can display a wavy line.
1381 *** New face spec attribute :distant-foreground
1382 specifies foreground to use if background color is near the foreground
1383 color that would otherwise have been used.
1388 *** `image-animated-p' is now `image-multi-frame-p'.
1389 It returns non-nil for any image that contains multiple frames,
1390 whether or not it specifies a frame delay.
1393 *** New variable `image-default-frame-delay' gives the frame delay for
1394 animated images which do not specify a frame delay.
1397 *** New functions `image-current-frame' and `image-show-frame' for getting
1398 and setting the current frame of a multi-frame image.
1403 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1404 **** object-name -> eieio-object-name
1405 **** object-class -> eieio-object-class
1406 **** object-class-fast -> eieio--object-class
1407 **** object-class-name -> eieio-object-class-name
1408 **** object-name-string -> eieio-object-name-string
1409 **** object-num-slots -> eieio--object-num-slots
1410 **** object-set-name-string -> eieio-object-set-name-string
1411 **** class-of -> eieio-object-class
1412 **** class-name -> eieio-class-name
1413 **** class-parent -> eieio-class-parent
1414 **** class-parents -> eieio-class-parents
1415 **** class-parents-fast -> eieio-class-parents-fast
1416 **** class-children -> eieio-class-children
1417 **** class-num-slots -> eieio--class-num-slots
1418 **** class-precedence-list -> eieio-class-precedence-list
1419 **** class-direct-subclasses -> eieio-class-children
1420 **** class-direct-superclasses -> eieio-class-parents
1422 ** Changes in encoding and decoding of text
1425 *** New coding-system `prefer-utf-8'.
1426 This is like `undecided' but prefers UTF-8 on decoding if the text to
1427 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1428 any non-ASCII characters are automatically encoded as UTF-8.
1431 *** New attributes of coding-systems whose type is `undecided'.
1432 Two new attributes, `:inhibit-null-byte-detection' and
1433 `:inhibit-iso-escape-detection', determine how to detect encoding of
1434 text that includes null bytes and ISO-2022 escape sequences,
1435 respectively. Each of these attributes can be either nil, zero, or
1436 t. If it is t, decoding text ignores null bytes and, respectively,
1437 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1438 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1439 text is encoded in one of the ISO-2022 encodings, such as
1440 iso-2022-7bit. If the value is zero, Emacs consults the variables
1441 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1443 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1444 UTF-8 encoding and decoding, whenever possible.
1446 These attributes are only meaningful for coding-systems of type
1447 `undecided'. (The type of a coding-system is determined by its
1448 `:coding-type' attribute and can be accessed by calling the
1449 `coding-system-type' function.)
1452 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1455 ** New functions `group-gid' and `group-real-gid'.
1458 ** The spelling of the rx.el category `chinese-two-byte' has been
1459 corrected (the first 'e' was missing).
1462 ** Minor internal changes to the details of lock files.
1463 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1464 If DIR/.#FILE already exists and is not an Emacs lock file,
1465 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1466 numbered lock files DIR/.#FILE.0...).
1467 On file systems that do not support symbolic links, the lock is now a
1468 regular file with contents being what would have been in the symlink.
1470 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1473 *** The package descriptor and name of global variables, constants,
1474 and functions should be separated by two hyphens if the symbol is not
1475 meant to be used by other packages.
1478 * Changes in Emacs 24.4 on Non-Free Operating Systems
1481 ** The procedure for building Emacs on MS-Windows has changed.
1482 It is now built by running the same configure script as on all other
1483 platforms. This requires the MSYS environment and MinGW development
1484 tools. See the updated instructions in nt/INSTALL for details.
1486 Using the Posix configure script and Makefile's also means a change in
1487 the directory structure of the Emacs installation on Windows. It is
1488 now the same as on GNU and Unix systems. In particular, the auxiliary
1489 programs, such as cmdproxy.exe and hexl.exe, are in
1490 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1491 version), version-independent site-lisp is in share/emacs/site-lisp,
1492 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1493 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1494 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1495 directories and will find the files in there automatically; there's no
1496 need to set any variables due to this change.)
1499 ** Emacs on Windows 2000 and later can now access files and directories
1500 whose names cannot be encoded in the current system codepage.
1502 The new variable `w32-unicode-filenames' controls this feature: if it
1503 is t, Emacs uses Unicode APIs to pass file names to system calls,
1504 which lifts the limitation of file names to the current locale.
1507 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1508 The backtrace is written to the 'emacs_backtrace.txt' file in the
1509 directory where Emacs was running.
1512 ** The variable `buffer-file-type' is no longer supported.
1513 Setting it has no effect, and %t in the mode-line format is ignored.
1514 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1515 modifying it has no effect.
1518 ** Lock files now work on MS-Windows.
1519 This helps to prevent losing your edits if the same file is being
1520 edited in another Emacs session or by another user. See the node
1521 "Interlocking" in the Emacs User Manual for the details. To disable
1522 file locking, customize `create-lockfiles' to nil.
1524 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1525 GNUstep and Mac OS X 10.4 use the old font backend.
1526 To use the old backend by default, do on the command line:
1527 % defaults write org.gnu.Emacs FontBackend ns
1529 ** Improved fullscreen support on Mac OS X.
1530 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1531 Customize `ns-use-native-fullscreen' to change the style.
1532 For Mac OS X 10.7 and newer, native is the default.
1534 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1535 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1536 does not apply to images.
1539 * Installation Changes in Emacs 24.3
1541 ** The default X toolkit is now Gtk+ version 3.
1542 If you don't pass `--with-x-toolkit' to configure, or if you use
1543 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1544 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1545 You can explicitly require a specific version by passing
1546 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1548 ** New configure option `--enable-link-time-optimization', to utilize
1549 an appropriate feature provided by GCC since version 4.5.0.
1551 ** New configure option `--without-all' to disable most of the optional
1552 features (image support, etc.) that are normally enabled by default.
1554 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1555 Emacs). If building with GCC, this enables compile-time checks that
1556 warn/give errors about possibly-questionable C code. On a recent GNU
1557 system there should be no warnings; on older and on non-GNU systems
1558 the results may be useful to developers.
1560 ** The configure option `--enable-use-lisp-union-type' has been
1561 renamed to `--enable-check-lisp-object-type', as the resulting
1562 Lisp_Object type no longer uses a union to implement the compile time
1563 check that this option enables.
1565 ** The configure option `--disable-maintainer-mode' has been removed,
1566 as it was confusingly-named and rarely useful.
1568 ** The configure options `--program-prefix', `--program-suffix', and
1569 `--program-transform-name' apply to more than just the installed
1570 binaries. Now they also affect the man pages, icons, and the
1571 etc/emacs.desktop file; but not the info pages, since this would break
1572 links between the various manuals.
1574 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1575 overwriting "emacs" in the installation bin/ directory with a link
1578 ** Emacs uses libtinfo in preference to libncurses, if available.
1580 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1581 /usr/pkg/lib to the linker search path. You must add them yourself if
1584 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1585 (from the bin and libexec directories, respectively). The former is
1586 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1589 * Startup Changes in Emacs 24.3
1591 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1592 lisp/ directory. There should not be any there anyway. If you have
1593 been adding them there, put them somewhere else; e.g., site-lisp.
1595 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1598 * Changes in Emacs 24.3
1602 *** `C-h f' (`describe-function') can now perform autoloading.
1603 When this command is called for an autoloaded function whose docstring
1604 contains a key substitution construct, that function's library is
1605 automatically loaded, so that the documentation can be shown
1606 correctly. To disable this, set `help-enable-auto-load' to nil.
1608 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1609 even after their associated libraries have been loaded (and the
1610 autoloads have been redefined as functions).
1614 *** Images displayed via ImageMagick now support transparency and the
1615 :background image specification property.
1617 *** When available, ImageMagick support is automatically enabled.
1618 It is no longer necessary to call `imagemagick-register-types'
1619 explicitly to install ImageMagick image types; that function is called
1620 automatically at startup, or when customizing an imagemagick- option.
1622 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1623 ImageMagick to view images. (You must call `imagemagick-register-types'
1624 afterwards if you do not use customize to change this.)
1626 *** The new variable `imagemagick-enabled-types' also affects which
1627 ImageMagick types are treated as images. The function
1628 `imagemagick-filter-types' returns the list of types that will be
1633 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1634 next and previous path separator, respectively.
1636 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1637 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1638 non-nil before enabling the mode.
1642 *** New option `mode-line-default-help-echo' specifies the help text
1643 (shown in a tooltip or in the echo area) for any part of the mode line
1644 that does not have its own specialized help text.
1646 *** You can now click mouse-3 in the coding system indicator to invoke
1647 `set-buffer-file-coding-system'.
1649 ** Server and client
1651 *** emacsclient now obeys string values for `initial-buffer-choice',
1652 if it is told to open a new frame without specifying any file to visit
1653 or expression to evaluate.
1655 *** New option `server-auth-key' specifies a shared server key.
1657 ** Emacs now generates backtraces on fatal errors.
1658 On encountering a fatal error, Emacs now outputs a textual description
1659 of the fatal signal, and a short backtrace on platforms like glibc
1660 that support backtraces.
1662 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1663 This minor mode replaces `toggle-read-only', which is now obsolete.
1665 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1666 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1667 respectively, without exiting from the prompt.
1669 ** In the Package Menu, newly-available packages are listed as "new",
1670 and sorted above the other "available" packages by default.
1672 ** If your Emacs was built from a repository checkout, the new variable
1673 `emacs-bzr-version' contains information about the bzr revision used.
1675 ** New option `create-lockfiles' specifies usage of lockfiles.
1676 It defaults to t. Changing it to nil inhibits the creation of lock
1677 files (use this with caution).
1679 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1680 variables on remote hosts.
1682 ** The entry for PCL-CVS has been removed from the Tools menu.
1683 The PCL-CVS commands are still available via the keyboard.
1685 ** Using "unibyte: t" in Lisp source files is obsolete.
1686 Use "coding: raw-text" instead.
1688 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1689 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1690 The previous binding, introduced in Emacs 24.1, was a mistake, because
1691 `C-c LETTER' bindings are reserved for user customizations.
1693 ** Internationalization
1695 *** New language environment: Persian.
1697 *** New input method `vietnamese-vni'.
1699 ** Nextstep (GNUstep / Mac OS X) port
1701 *** Support for fullscreen and the frame parameter fullscreen.
1703 *** A file dialog is used for open/save operations initiated from the
1707 * Editing Changes in Emacs 24.3
1709 ** Search and Replace
1711 *** Non-regexp Isearch now performs "lax" space matching.
1712 Each sequence of spaces in the supplied search string may match any
1713 sequence of one or more whitespace characters, as specified by the
1714 variable `search-whitespace-regexp'. (This variable is also used by a
1715 similar existing feature for regexp Isearch.)
1717 *** New Isearch command `M-s SPC' toggles lax space matching.
1718 This applies to both ordinary and regexp Isearch.
1720 *** New option `replace-lax-whitespace'.
1721 If non-nil, `query-replace' uses flexible whitespace matching too.
1724 *** Global `M-s _' starts a symbol (identifier) incremental search,
1725 and `M-s _' in Isearch toggles symbol search mode.
1726 `M-s c' in Isearch toggles search case-sensitivity.
1728 ** Navigation commands
1730 *** New binding `M-g c' for `goto-char'.
1732 *** New binding `M-g TAB' for `move-to-column'.
1734 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1735 interactively with no prefix arg. Previously, it moved to column 1.
1737 ** New option `yank-handled-properties' allows processing of text
1738 properties on yanked text, in ways that are more general than just
1739 removing them (as is done by `yank-excluded-properties').
1741 ** New option `delete-trailing-lines' specifies whether
1742 M-x delete-trailing-whitespace should delete trailing lines at the end
1743 of the buffer. It defaults to t.
1745 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1747 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1748 `ucs-insert' is now an obsolete alias for `insert-char'.
1750 ** The `z' key no longer has a binding in most special modes.
1751 It used to be bound to `kill-this-buffer', but `z' is too easy to
1754 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1755 It copies the region-rectangle as the last rectangle kill.
1759 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1761 *** New option `register-separator' specifies the register containing
1762 the text to put between collected texts for use with
1763 M-x append-to-register and M-x prepend-to-register.
1766 * Changes in Specialized Modes and Packages in Emacs 24.3
1768 ** Common Lisp emulation (CL)
1770 *** CL's main entry is now (require 'cl-lib).
1771 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1772 i.e., all its definitions have the "cl-" prefix (and internal definitions
1773 use the "cl--" prefix).
1775 If `cl' provided a feature under the name `foo', then `cl-lib'
1776 provides it under the name `cl-foo' instead; with the exceptions of the
1777 few `cl' definitions that had to use `foo*' to avoid conflicts with
1778 pre-existing Elisp entities. These have been renamed to `cl-foo'
1779 rather than `cl-foo*'.
1781 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1782 provide the old, non-prefixed names. Some exceptions are listed below:
1784 *** `cl-flet' is not like `flet' (which is deprecated).
1785 Instead it obeys the behavior of Common-Lisp's `flet'.
1786 In particular, in cl-flet function definitions are lexically scoped,
1787 whereas in flet the scoping is dynamic.
1789 *** `cl-labels' is slightly different from `labels'.
1790 The difference is that it relies on the `lexical-binding' machinery
1791 (as opposed to the `lexical-let' machinery used previously) to capture
1792 definitions in closures, so such closures will only work if `lexical-binding'
1795 *** `cl-letf' is not exactly like `letf'.
1796 The only difference is in details that relate to some deprecated usage
1797 of `symbol-function' in place forms.
1799 *** `progv' was rewritten to use the `let' machinery.
1800 A side effect is that variables without corresponding values are bound
1801 to nil rather than being made unbound.
1803 *** The following methods of extending `setf' are obsolete
1804 (use features from gv.el instead):
1805 `define-modify-macro' (use `gv-letplace')
1806 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1807 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1808 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1812 *** Changes are now highlighted using the same color scheme as in
1813 modern VCSes. Deletions are displayed in red (new faces
1814 `diff-refine-removed' and `smerge-refined-removed', and new definition
1815 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1816 and `smerge-refined-added', and new definition of `diff-added').
1818 *** The variable `diff-use-changed-face' defines whether to use the
1819 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1820 changes in context diffs.
1822 *** The new command `diff-delete-trailing-whitespace' removes trailing
1823 whitespace introduced by a diff.
1825 ** Ediff now uses the same color scheme as Diff mode.
1829 A new version of python.el, which provides several new features, including:
1830 per-buffer shells, better indentation, Python 3 support, and improved
1831 shell-interaction compatible with iPython (and virtually any other
1834 *** Some user options have been replaced/renamed, including (old -> new):
1835 **** python-indent -> python-indent-offset
1836 **** python-guess-indent -> python-indent-guess-indent-offset
1837 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1838 **** python-use-skeletons -> python-skeleton-autoinsert
1840 *** Some user options have been removed, including:
1842 **** `python-indent-string-contents': Strings are never indented.
1844 **** `python-honour-comment-indentation':
1845 Comments are always considered as indentation markers.
1847 **** `python-continuation-offset': Indentation is automatically
1848 calculated in a pep8 compliant way depending on the context.
1850 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1851 Have no direct mapping as the shell interaction is completely different.
1853 **** `python-python-command', `python-jython-command':
1854 Replaced by `python-shell-interpreter'.
1856 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1857 `python-pdbtrack-minor-mode-string', `python-source-modes':
1860 *** Some commands have been replaced (old -> new):
1861 **** python-insert-class -> python-skeleton-class
1862 **** python-insert-def -> python-skeleton-def
1863 **** python-insert-for -> python-skeleton-for
1864 **** python-insert-if -> python-skeleton-if
1865 **** python-insert-try/except -> python-skeleton-try
1866 **** python-insert-try/finally -> python-skeleton-try
1867 **** python-insert-while -> python-skeleton-while
1868 **** python-find-function -> python-nav-jump-to-defun
1869 **** python-next-statement -> python-nav-forward-sentence
1870 **** python-previous-statement -> python-nav-backward-sentence
1871 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1872 **** python-end-of-defun-function -> python-nav-end-of-defun
1873 **** python-send-buffer -> python-shell-send-buffer
1874 **** python-send-defun -> python-shell-send-defun
1875 **** python-send-region -> python-shell-send-region
1876 **** python-send-region-and-go -> emulate with python-shell-send-region
1877 and python-shell-switch-to-shell
1878 **** python-send-string -> python-shell-send-string
1879 **** python-switch-to-python -> python-shell-switch-to-shell
1880 **** python-describe-symbol -> python-eldoc-at-point
1884 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1886 *** The D-Bus object manager interface is implemented.
1888 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1889 if their value does not fit into Emacs's integer range.
1891 *** The function `dbus-call-method' is now non-blocking.
1892 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1894 *** Signals can also be sent as unicast messages.
1896 *** The argument list of `dbus-register-signal' has been extended,
1897 according to the new match rule types of D-Bus.
1899 *** `dbus-init-bus' supports private connections.
1901 *** There is a new function `dbus-setenv'.
1903 ** `desktop-path' no longer includes the "." directory.
1904 Desktop files are now located in ~/.emacs.d by default.
1908 *** `dired-do-async-shell-command' executes each file sequentially
1909 if the command ends in `;' (when operating on multiple files).
1910 Otherwise, it executes the command on each file in parallel.
1912 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1913 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1916 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1917 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1918 mark/unmark/flag all files in the active region.
1920 *** The minibuffer default for `=' (`dired-diff') has changed.
1921 It is now the backup file for the file at point, if one exists.
1922 In Transient Mark mode the default is the file at the active mark.
1924 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1925 The global binding for `M-=', `count-words-region' is in effect.
1929 *** New module "notifications", which can send a notification when you
1930 receive a private message or your nickname is mentioned.
1932 *** ERC will look up server/channel names via auth-source and use any
1935 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1936 only applies to messages sent by lurkers.
1938 ** reStructuredText mode
1940 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1941 fontification, comment handling, and customization have all been revised
1944 *** Support for `imenu' and `which-function-mode'.
1946 *** The reStructuredText syntax is more closely covered.
1947 Sphinx support has been improved.
1949 *** `rst-insert-list' inserts new list or continues existing lists.
1951 *** A negative prefix argument always works for `rst-adjust'.
1953 *** The window configuration is reset after displaying a TOC.
1955 *** The constant `rst-version' describes the rst.el package version.
1959 *** Support for percent literals and recognition of regular expressions
1960 in method calls without parentheses with more methods, including Cucumber
1963 *** Improved syntax highlighting and indentation.
1965 *** New command `ruby-toggle-block', bound to `C-c {'.
1967 *** Some non-standard keybindings/commands have been removed:
1969 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1971 **** `ruby-mark-defun'; use `mark-defun'.
1973 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1974 appropriate settings for the variables `beginning-of-defun-function'
1975 and `end-of-defun-function'.
1977 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1978 `reindent-then-newline-and-indent' and `newline' have been removed.
1980 ** Shell Script mode
1982 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1984 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1986 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1990 *** The free software compiler GHDL is supported (and now the default).
1992 *** Support for the VHDL-AMS packages has been added/updated.
1994 *** Updated to the 2002 revision of the VHDL standard.
1996 *** Accepts \r and \f as whitespace.
2000 *** The faces used by Apropos are now directly customizable.
2001 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
2002 see the `apropos' Custom group for details.
2004 *** The old options whose values specified faces to use have been removed
2005 (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
2006 `apropos-match-face' and `apropos-property-face'.).
2010 *** This package has been rewritten to use Tabulated List mode.
2012 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
2013 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
2017 *** Algebraic simplification mode is now the default.
2018 To restrict to the limited simplifications given by the former
2019 default simplification mode, use `m I'.
2023 *** You can customize the header text that appears above each calendar month.
2024 See the variable `calendar-month-header'.
2026 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
2028 *** The calendars produced by cal-html include holidays.
2029 Customize `cal-html-holidays' to change this.
2033 *** The major modes from the parser generators "Bovine" and "Wisent"
2034 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
2035 are in `auto-mode-alist', and the corresponding manuals are included.
2039 **** Menu support for the "Configuration" feature. This allows users to
2040 choose the active configuration (such as debug or install) from the menu.
2042 **** New command `ede-set' to interactively set project-local variables.
2044 **** Support for compiling, debugging, and running in "generic" projects.
2046 **** Autoconf editing support for M4 macros with complex arguments.
2048 **** Compilation support for the "linux" project type.
2050 **** "simple" projects have been removed; use "generic" projects instead.
2054 **** Support for parsing #include statements inside a namespace in C/C++.
2056 **** Improved support for 'extern "C"' declarations in C/C++.
2058 **** The ability to ignore more common special C/C++ preprocessor symbols,
2059 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
2060 If available, include cdefs.h as an additional source of preprocessor symbols.
2062 **** Improved C/C++ function pointer parsing.
2064 **** In Python, support for converting imports to include file names.
2066 **** Ability to dynamically determine the Python load path.
2068 **** Support for the Python 'WITH' and 'AT' keywords.
2070 **** Improved tooltip completion.
2074 **** The SRecode manual is now included.
2076 **** Tag generation supports constructor/destructor settings and system
2077 include differentiation.
2079 **** Addition of 'Framework' support: Frameworks are specified when a
2080 particular kind of library (such as Android) is needed in a common language
2083 **** Support for nested templates and let variables override based on priority.
2085 **** Support for merging tables from multiple related modes, such as
2086 default -> c++ -> arduino.
2088 ** Compile has a new option `compilation-always-kill'.
2092 *** `custom-reset-button-menu' now defaults to t.
2094 *** Non-option variables are never matched in `customize-apropos' and
2095 `customize-apropos-options' (i.e., the prefix argument does nothing for
2096 these commands now).
2100 *** The variables `term-default-fg-color' and `term-default-bg-color'
2101 are now deprecated in favor of the customizable face `term'.
2103 *** You can customize how to display ANSI terminal colors and styles
2104 by customizing the corresponding `term-color-<COLOR>',
2105 `term-color-underline' and `term-color-bold' faces.
2109 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
2111 *** Remote processes are now also supported on remote MS-Windows hosts.
2115 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
2116 Previously, this slot stored semicolon-separated attribute-value pairs
2117 appended to some imap URLs, but this is not compatible with RFC 3986.
2118 So now the `filename' slot stores the entire path and query components,
2119 and the `attributes' slot is always nil.
2121 *** New function `url-encode-url' for encoding a URI string.
2122 The `url-retrieve' function now uses this to encode its URL argument,
2123 in case that is not properly encoded.
2125 ** notifications.el supports now version 1.2 of the Notifications API.
2126 The function `notifications-get-capabilities' returns the supported
2129 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2130 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2131 `flymake-warning-bitmap'.
2133 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2134 specifying URL types that should be converted to remote file names at
2135 the FFAP prompt. The default is now '("ftp").
2137 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2138 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2140 ** New option `mouse-avoidance-banish-position' specifies where the
2141 `banish' mouse avoidance setting moves the mouse.
2143 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2144 closing brackets to be aligned with the line of the opening bracket.
2146 ** In Proced mode, new command `proced-renice' renices marked processes.
2148 ** New option `async-shell-command-buffer' specifies the buffer to use
2149 for a new asynchronous `shell-command' when the default output buffer
2150 `*Async Shell Command*' is already in use.
2152 ** SQL mode has a new option `sql-db2-escape-newlines'.
2153 If non-nil, newlines sent to the command interpreter will be escaped
2154 by a backslash. The default does not escape the newlines and assumes
2155 that the sql statement will be terminated by a semicolon.
2157 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2158 (and modes that derive from it), sorts the column at point, or the Nth
2159 column if a numeric prefix argument is given.
2161 ** `which-func-modes' now defaults to t, so Which Function mode, when
2162 enabled, applies to all applicable major modes.
2164 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2167 ** Follow mode no longer works by using advice.
2168 The option `follow-intercept-processes' has been removed.
2170 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2172 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2173 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2174 *** semantic-change-hooks -> semantic-change-functions
2175 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2176 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2177 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2178 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2179 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2180 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2181 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2182 *** rcirc-activity-hooks -> rcirc-activity-functions
2183 *** rcirc-print-hooks -> rcirc-print-functions
2184 *** dbus-event-error-hooks -> dbus-event-error-functions
2185 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2186 *** checkdoc-style-hooks -> checkdoc-style-functions
2187 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2188 *** archive-extract-hooks -> archive-extract-hook
2189 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2190 *** hfy-post-html-hooks -> hfy-post-html-hook
2191 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2192 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2193 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2194 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2196 ** Obsolete packages
2199 In most cases, assoc+member+push+delq work just as well.
2200 And in any case it's just a terrible package: ugly semantics, terrible
2201 inefficiency, and not namespace-clean.
2210 * Incompatible Lisp Changes in Emacs 24.3
2212 ** Docstrings starting with `*' no longer indicate user options.
2213 Only variables defined using `defcustom' are considered user options.
2214 The function `user-variable-p' is now an obsolete alias for
2215 `custom-variable-p'.
2217 ** The return values of `defalias', `defun' and `defmacro' have changed,
2218 and are now undefined. For backwards compatibility, `defun' and
2219 `defmacro' currently return the name of the newly defined
2220 function/macro, but this should not be relied upon.
2222 ** `random' by default now returns a different random sequence in
2223 every Emacs run. Use `(random S)', where S is a string, to set the
2224 random seed to a value based on S, in order to get a repeatable
2225 sequence in later calls.
2227 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2228 that substring is inserted literally even if the LITERAL arg is
2229 non-nil, instead of causing an error to be signaled.
2231 ** `select-window' now always makes the window's buffer current.
2232 It does so even if the window was selected before.
2234 ** The function `x-select-font' can return a font spec, instead of a
2235 font name as a string. Whether it returns a font spec or a font name
2236 depends on the graphical library.
2238 ** `face-spec-set' no longer sets frame-specific attributes when the
2239 third argument is a frame (that usage was obsolete since Emacs 22.2).
2241 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2243 ** The CL package's `get-setf-method' function no longer exists.
2244 Generalized variables are now part of core Emacs Lisp, and implemented
2245 differently to the way cl.el used to do it. It is not possible to
2246 define a compatible replacement for `get-setf-method'. See the file
2247 gv.el for internal details of the new implementation.
2249 ** The arguments of `dbus-register-signal' are no longer just strings,
2250 but keywords or keyword-string pairs. The old argument list will
2251 still be supported for Emacs 24.x.
2253 ** Miscellaneous name changes
2254 Some Lisp symbols have been renamed to correct their spelling,
2255 or to be more consistent with standard Emacs terminology.
2257 *** Renamed functions
2258 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2259 **** inactivate-input-method -> deactivate-input-method
2260 **** quail-inactivate -> quail-deactivate
2261 **** robin-inactivate -> robin-deactivate
2262 **** viper-inactivate-input-method -> viper-deactivate-input-method
2263 **** viper-inactivate-input-method-action ->
2264 viper-deactivate-input-method-action
2265 **** ucs-input-inactivate -> ucs-input-deactivate
2268 The old hooks are still supported for backward compatibility, but they
2269 are deprecated and will be removed eventually.
2270 **** input-method-inactivate-hook -> input-method-deactivate-hook
2271 **** robin-inactivate-hook -> robin-deactivate-hook
2272 **** quail-inactivate-hook -> quail-deactivate-hook
2274 *** Renamed variables
2275 **** follow-deactive-menu -> follow-inactive-menu
2276 **** inactivate-current-input-method-function ->
2277 deactivate-current-input-method-function
2279 ** Some obsolete functions, variables, and faces have been removed:
2280 *** `last-input-char', `last-command-char', `unread-command-char'
2281 *** `facemenu-unlisted-faces'
2282 *** `rmail-decode-mime-charset'
2283 *** `iswitchb-read-buffer'
2284 *** `sc-version', `sc-submit-bug-report'
2285 *** `set-char-table-default'
2286 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2287 *** `compile-internal'
2289 *** `mode-line-inverse-video'
2290 *** `follow-mode-off-hook'
2291 *** `cvs-commit-buffer-require-final-newline'
2292 (use `log-edit-require-final-newline' instead)
2293 *** `cvs-changelog-full-paragraphs'
2294 (use `log-edit-changelog-full-paragraphs' instead)
2295 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2296 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2297 *** `vc-master-templates' (use `vc-handled-backends' instead)
2298 *** `vc-checkout-carefully'
2301 * Lisp Changes in Emacs 24.3
2303 ** CL-style generalized variables are now in core Elisp.
2304 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2305 You can define your own generalized variables using `gv-define-simple-setter',
2306 `gv-define-setter', etc.
2308 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2309 This can significantly speed up execution of non-byte-compiled code,
2310 but can also bump into previously unnoticed cyclic dependencies.
2311 These are generally harmless: they will simply cause the macro calls
2312 to be left for later expansion (as before), but will result in a
2313 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2314 You may wish to restructure your code so this does not happen.
2316 ** New sampling-based Elisp profiler.
2317 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2318 When finished, use M-x profiler-stop. The sampling rate can be based on
2319 CPU time or memory allocations.
2321 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2322 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2324 ** New macros `setq-local' and `defvar-local'.
2326 ** Face underlining can now use a wave.
2328 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2329 of `read-regexp' accepts a string ending with a colon and space, and its
2330 second argument DEFAULTS can be a list of strings accessible via `M-n'
2331 in the minibuffer ahead of other hard-coded useful regexp-related values.
2332 More commands use `read-regexp' now to read their regexp arguments.
2336 *** New function `completion-table-with-quoting' to handle completion
2337 in the presence of quoting, such as file completion in shell buffers.
2339 *** New function `completion-table-subvert' to use an existing completion
2340 table, but with a different prefix.
2344 *** New error type and new function `user-error'.
2345 These do not trigger the debugger.
2347 *** New option `debugger-bury-or-kill', saying what to do with the
2348 debugger buffer when exiting debug.
2350 *** Set `debug-on-message' to enter the debugger when a certain
2351 message is displayed in the echo area. This can be useful when trying
2352 to work out which code is doing something.
2354 *** New var `inhibit-debugger', automatically set to prevent accidental
2355 recursive invocations.
2359 *** New command `fit-frame-to-buffer' adjusts the frame height to
2362 *** The command `fit-window-to-buffer' can adjust the frame height
2363 if the new option `fit-frame-to-buffer' is non-nil.
2365 *** New macro `with-temp-buffer-window', similar to
2366 `with-output-to-temp-buffer'.
2368 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2371 *** New option `switch-to-buffer-preserve-window-point' to restore a
2372 window's point when switching buffers.
2374 *** New display action alist entries `window-height' and `window-width'
2375 specify the size of new windows created by `display-buffer'.
2377 *** New display action alist entry `pop-up-frame-parameters', if
2378 non-nil, specifies frame parameters to give any newly-created frame.
2380 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2381 tells display action functions to avoid changing which frame is
2384 *** New display action alist entry `previous-window', if non-nil,
2385 specifies window to reuse in `display-buffer-in-previous-window'.
2387 *** New display action functions `display-buffer-below-selected',
2388 and `display-buffer-in-previous-window'.
2390 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2391 now accept a third argument to avoid choosing the selected window.
2393 *** Additional values recognized for option `window-combination-limit'.
2395 *** The following variables are obsolete, as they can be replaced by
2396 appropriate entries in the `display-buffer-alist' function introduced
2398 **** `dired-shrink-to-fit'
2399 **** `display-buffer-reuse-frames'
2400 **** `display-buffer-function'
2401 **** `special-display-buffer-names'
2402 **** `special-display-frame-alist'
2403 **** `special-display-function'
2404 **** `special-display-regexps'
2408 *** `current-time-string' no longer requires that its argument's year
2409 must be in the range 1000..9999. It now works with any year supported
2410 by the underlying C implementation.
2412 *** `current-time' now returns extended-format time stamps
2413 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2414 PSEC is typically a multiple of 1000 on current machines. Other
2415 functions that use this format, such as `file-attributes' and
2416 `format-time-string', have been changed accordingly. Old-format time
2417 stamps are still accepted.
2419 *** The format of timers in `timer-list' and `timer-idle-list' is now
2420 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2421 The PSECS slot is new, and uses picosecond resolution. It can be
2422 accessed via the new `timer--psecs' accessor.
2424 *** Last-modified time stamps in undo lists now are of the form
2425 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2429 *** Improved security when handling persistent objects:
2431 **** `eieio-persistent-read' now features optional arguments for specifying
2432 the class to load, as well as a flag stating whether subclasses are allowed;
2433 if provided, other classes will be rejected by the reader. For
2434 compatibility with existing code, if the class is omitted only a
2437 **** New specialized reader for pulling in classes and signaling errors
2438 without evaluation of suspicious code.
2440 **** All slots that contain objects must have a :type. Slots with lists
2441 of objects must use a new type predicate for a list of an object type.
2443 *** Support for `find-function' and similar utilities, through the addition
2444 of filename support to generated symbols.
2446 ** Floating point functions now always return special values like NaN,
2447 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2448 Previously, they returned NaNs on some platforms but signaled errors
2449 on others. The affected functions are acos, asin, tan, exp, expt,
2450 log, log10, sqrt, and mod.
2452 ** New fringe bitmap `exclamation-mark'.
2454 ** Miscellaneous changes to special forms and macros
2456 *** `defun' and `defmacro' are now macros rather than special forms.
2458 *** `kbd' is now a function rather than a macro.
2460 ** Miscellaneous new functions
2462 *** `set-temporary-overlay-map' sets up a temporary keymap that
2463 takes precedence over most other maps for a short while (normally one key).
2465 *** `autoloadp' tests if its argument is an autoloaded object.
2467 *** `autoload-do-load' performs the autoloading operation.
2469 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2471 *** `file-name-base' returns a file name sans directory and extension.
2473 *** `function-get' fetches a function property, following aliases.
2475 *** `posnp' tests if an object is a `posn'.
2477 *** `system-users' returns the user names on the system.
2479 *** `system-groups' returns the group names on the system.
2481 *** `tty-top-frame' returns the topmost frame of a text terminal.
2483 ** The following functions and variables are obsolete:
2484 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2485 *** `buffer-has-markers-at'
2486 *** `macro-declaration-function' (use `macro-declarations-alist')
2487 *** `window-system-version' (provides no useful information)
2488 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2489 *** `query-replace-interactive'
2490 *** `font-list-limit' (has had no effect since Emacs < 23)
2493 * Changes in Emacs 24.3 on Non-Free Operating Systems
2495 ** Cygwin builds can use the native MS Windows user interface.
2496 Pass `--with-w32' to configure. The default remains the X11 interface.
2498 ** Two new functions are available in Cygwin builds:
2499 `cygwin-convert-file-name-from-windows' and
2500 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2501 code to access the Cygwin file-name mapping machinery to convert
2502 between Cygwin and Windows-native file and directory names.
2504 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2505 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2506 `mouse-autoselect-window'.
2508 ** On MS Windows Vista and later Emacs now supports symbolic links.
2510 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2511 support for libxml2, even if its presence is detected.
2513 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2515 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2516 directories to the search path. You must add them yourself if you want them.
2519 * Changes in Emacs 24.2
2521 ** This is mainly a bug-fix release.
2524 * Installation Changes in Emacs 24.1
2526 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2527 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2528 also depend on Gtk+. You can disable them with --without-rsvg and
2531 ** Emacs can be compiled with GnuTLS support.
2532 This happens by default if a suitably recent version of the library is
2533 found at build time. To prevent this, use the configure option
2534 `--without-gnutls'. See below for GnuTLS features.
2536 ** Emacs can be compiled with SELinux support.
2537 This happens by default if a suitably recent version of the library is
2538 found at build time. To prevent this, use the configure option
2539 `--without-selinux'. See below for SELinux features.
2541 ** Emacs can be compiled with ImageMagick support.
2542 This happens by default if a suitably recent version of the library is
2543 found at build time. To prevent this, use the configure option
2544 `--without-imagemagick'. See below for ImageMagick features.
2545 This feature is not available for the Nextstep or MS ports.
2547 ** Emacs can be compiled with libxml2 support.
2548 This happens by default if a suitably recent version of the library is
2549 found at build time. To prevent this, use the configure option
2550 `--without-xml2'. See below for libxml2 features.
2552 ** By default, the installed Info and man pages are compressed.
2553 You can disable this by configuring --without-compress-info.
2555 ** New configure option --with-wide-int.
2556 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2557 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2560 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2561 These provide no new functionality, they just remove the need to edit
2562 lib-src/Makefile by hand in order to use the associated features.
2564 ** New configure option --enable-use-lisp-union-type.
2565 This is only useful for Emacs developers to debug certain types of bugs.
2566 This is not a new feature; only the configure flag is new.
2568 ** The standalone programs digest-doc and sorted-doc are removed.
2569 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2571 ** The standalone program `fakemail' is removed.
2572 If you need it, feedmail.el provides a superset of the functionality.
2575 * Startup Changes in Emacs 24.1
2577 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2578 command line arguments, and the EMACS_UNIBYTE environment variable, no
2579 longer have any effect. (They were declared obsolete in Emacs 23.)
2581 ** New command line option `--no-site-lisp' removes site-lisp directories
2582 from load-path. -Q now implies this. This option does not affect the
2583 EMACSLOADPATH environment variable (and hence has no effect for
2587 * Changes in Emacs 24.1
2591 *** Many packages now use the `completion-at-point' command,
2592 rather than implementing separate completion commands.
2594 *** `completion-at-point' now handles tags and semantic completion.
2596 *** Completion in a non-minibuffer now tries to detect the end of completion
2597 and pops down the *Completions* buffer accordingly.
2599 *** New option `completion-cycle-threshold' allows completion cycling.
2601 *** New option `completion-category-overrides' for overriding the
2602 default completion style in certain circumstances.
2604 *** New completion style `substring'.
2606 *** Completion of buffer names uses `substring' completion by default.
2608 *** The option `widget-complete-field' has been removed.
2612 *** The first time you try sending mail, Emacs asks for a mail method.
2613 This is implemented by a new default for `send-mail-function', which
2614 is `sendmail-query-once'. This offers to use the smtpmail package, or
2615 to use the old defaults relying on external mail facilities
2616 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2617 `mailclient-send-it' on Windows).
2619 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2620 transfers the report to your desktop's preferred mail client, if there
2621 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2624 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2625 and Mail mode changes
2627 ** Emacs server and client changes
2629 *** New option `server-port' specifies the port for TCP Emacs servers.
2631 *** New emacsclient argument -q/--quiet suppresses some status messages.
2633 *** New emacsclient argument --frame-parameters specifies the frame
2634 parameters of any newly-created graphical frame.
2636 *** If emacsclient shuts down due to Emacs signaling an error,
2637 its exit status is 1.
2639 *** New emacsclient argument --parent-id ID.
2640 This opens a client frame in parent X window ID, via XEmbed, similar
2641 to the --parent-id argument to Emacs.
2643 ** Internationalization changes
2645 *** Emacs now supports display and editing of bidirectional text.
2646 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2647 displayed in the correct visual order as expected by users of those
2648 scripts. The display reordering is a "full bidirectionality" class
2649 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2650 with no RTL text should look exactly the same as before.
2652 **** New buffer-local variable `bidi-display-reordering'.
2653 To disable display reordering in a buffer, change this to nil.
2655 **** New buffer-local variable `bidi-paragraph-direction'.
2656 If nil (the default), Emacs determines the base direction of each
2657 paragraph from its text, as specified by the UBA. Setting the value
2658 to `right-to-left' or `left-to-right' forces a base direction on each
2661 Paragraphs with right-to-left base direction are displayed starting at
2662 the right window edge.
2664 *** Enhanced support for characters with no glyphs in available fonts,
2665 or, on text terminals, characters that cannot be encoded by the
2666 terminal coding system. The new option `glyphless-char-display-control'
2667 specifies how to display them: as a hexadecimal code in a box, a thin
2668 1-pixel space, an empty box, etc.
2670 *** New input methods for Farsi and Bulgarian
2671 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2673 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2674 (U+2010 and U+2011).
2676 *** New Hebrew translation of the Emacs Tutorial.
2677 Type `C-u C-h t' to choose it in case your language setup doesn't
2678 automatically select it.
2680 ** An Emacs Lisp package manager is now included.
2681 This is a convenient way to download and install additional packages,
2682 from a package repository at http://elpa.gnu.org.
2684 *** M-x list-packages shows a list of packages, which can be
2685 selected for installation.
2687 *** New command `describe-package', bound to `C-h P'.
2689 *** By default, all installed packages are loaded automatically when
2690 Emacs starts up. To disable this, set `package-enable-at-startup' to
2691 nil. To specify the packages to load, customize `package-load-list'.
2693 ** Custom theme changes
2695 *** New command `M-x customize-themes', which provides a convenient
2696 interface for enabling and disabling Custom themes.
2698 *** New option `custom-theme-load-path' is the load path for themes.
2699 Emacs no longer looks for Custom themes in `load-path'. The default
2700 value of `custom-theme-load-path' says to look for themes in
2701 `custom-theme-directory', followed by a subdirectory of
2702 `data-directory' named "themes/", which contains a small selection of
2703 built-in Custom themes.
2705 *** New option `custom-safe-themes' records known-safe theme files.
2706 If a theme is not in this list, Emacs queries before loading it, and
2707 offers to save the theme to `custom-safe-themes' automatically. By
2708 default, all themes included in Emacs are treated as safe.
2710 ** Improved GTK integration
2712 *** GTK scroll-bars are now placed on the right by default.
2713 The function `set-scroll-bar-mode' can change this.
2715 *** GTK tool bars can have just text, just images or images and text.
2716 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2717 the default is taken from desktop settings.
2719 *** GTK tool bars can be placed on any edge of the frame.
2720 The frame-parameter tool-bar-position controls this. It takes the
2721 values top, left, right or bottom. The Options => Show/Hide menu has
2724 *** The default colors for selected text (the `region' face) are taken
2725 from the GTK theme when Emacs is built with GTK.
2727 *** Emacs uses GTK tooltips by default if built with GTK.
2728 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2730 ** Graphical interface changes
2732 *** On graphical displays, the mode-line no longer ends in dashes.
2733 Also, the first dash (which does not indicate anything) is just
2734 displayed as a space.
2736 *** `menu-bar-select-buffer-function' lets you choose another operation
2737 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2739 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2740 built with Xft. These fonts can be set via X resources, for example:
2741 Emacs.pane.menubar.font: Courier-12
2745 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2746 or if it receives a SIGINT signal in batch mode.
2748 *** `kill-emacs-hook' is now also run in batch mode.
2749 Third-party code which adds to `kill-emacs-hook' should check if they
2750 do the right thing in batch mode.
2752 ** Scrolling changes
2754 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2755 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2756 of buffer at first key-press (instead they move to top/bottom of buffer)
2757 when `scroll-error-top-bottom' is non-nil.
2759 *** New option `scroll-error-top-bottom' (see above).
2761 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2762 scroll a line instead of full screen.
2764 *** New property `scroll-command' should be set on a command's symbol to
2765 define it as a scroll command affected by `scroll-preserve-screen-position'.
2767 *** If you customize `scroll-conservatively' to a value greater than 100,
2768 Emacs will never recenter point in the window when it scrolls due to
2769 cursor motion commands or commands that move point (e.f., `M-g M-g').
2770 Previously, you needed to use `most-positive-fixnum' as the value of
2771 `scroll-conservatively' to achieve the same effect.
2773 *** "Aggressive" scrolling now honors the scroll margins.
2774 If you customize `scroll-up-aggressively' or
2775 `scroll-down-aggressively' and move point off the window, Emacs now
2776 scrolls the window so as to avoid positioning point inside the scroll
2779 ** Basic SELinux support has been added.
2780 This requires Emacs to be linked with libselinux at build time.
2782 *** Emacs preserves the SELinux file context when backing up.
2783 Also, the function `copy-file' has an extra optional argument for
2784 preserving SELinux context, and the return value of `backup-buffer'
2785 now includes the SELinux context.
2787 *** New functions `file-selinux-context' and `set-file-selinux-context'
2788 get and set the SELinux context of a file.
2792 *** `delete-by-moving-to-trash' now only affects commands that specify
2793 trashing. This avoids inadvertently trashing temporary files.
2795 *** Calling `delete-file' or `delete-directory' with a prefix argument
2796 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2798 ** File- and directory-local variable changes
2800 *** You can stop directory local vars from applying to subdirectories.
2801 Add an element (subdirs . nil) to the alist portion of any variables
2802 settings to indicate that the section should not apply to
2805 *** Directory local variables can apply to some file-less buffers.
2806 Affected modes include dired, vc-dir, and log-edit. For example,
2807 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2808 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2809 `hack-dir-local-variables-non-file-buffer' to support this.
2811 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2812 Instead, use "eval: (minor-mode 1)".
2814 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2815 to `inhibit-local-variables-regexps'. As the name suggests, it now
2816 applies to ALL file local variables, not just -*- lines. The
2817 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2822 *** The `quit-window' command now restores the last buffer displayed
2823 in the quitted window.
2825 *** Resizing an Emacs frame now preserves proportional window sizes,
2826 modulo restrictions like window minimum sizes and fixed-size windows.
2828 *** The behavior of `display-buffer' is now customizable in detail.
2830 **** New option `display-buffer-base-action' specifies a list of
2831 user-determined display "actions" (functions and optional arguments
2832 for choosing the displaying window).
2834 This takes precedence over the default display action, which is
2835 specified by `display-buffer-fallback-action'.
2837 **** New option `display-buffer-alist' maps buffer name regexps to
2838 display actions, taking precedence over `display-buffer-base-action'.
2840 *** New option `window-combination-limit'.
2841 The new option `window-combination-limit' allows to return the space
2842 obtained for resizing or creating a window more reliably to the window
2843 from which such space was obtained.
2845 *** New option `window-combination-resize'.
2846 The new option `window-combination-resize' allows to split a window that
2847 otherwise cannot be split because it's too small by stealing space from
2848 other windows in the same combination. Subsequent resizing or deletion
2849 of the window will resize all windows in the same combination as well.
2851 *** New option `frame-auto-hide-function' lets you choose between
2852 iconifying or deleting a frame when burying a buffer in a dedicated
2853 frame, or quitting a window showing a buffer in a frame of its own.
2855 *** New commands `maximize-window' and `minimize-window'.
2856 These maximize and minimize the size of a window within its frame.
2858 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2859 These functions allow to navigate through the live buffers that have
2860 been shown in a specific window.
2862 ** Minibuffer changes
2864 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2865 This is handy for minibuffer-only frames, and is also used for the feature
2866 where mouse-1 pops up *Messages*"', which can now easily be changed.
2868 *** Minibuffers set `truncate-lines' to nil.
2869 If you want to change the value to something else, you could use
2870 for example `minibuffer-setup-hook'.
2872 ** `auto-mode-case-fold' is now enabled by default.
2874 ** `backup-by-copying-when-mismatch' now defaults to t.
2876 ** New basic faces `error', `warning', `success'.
2877 These are used to highlight text indicating failure, caution or
2878 successful operation.
2880 ** New option `list-colors-sort' defines the color sort order
2881 for `list-colors-display'.
2883 ** The variable `focus-follows-mouse' now always defaults to nil.
2886 * Editing Changes in Emacs 24.1
2890 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2891 `isearch-yank-line'.
2893 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2894 `isearch-yank-kill'.
2896 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2898 ** New commands `count-words-region' and `count-words'.
2900 *** M-= is bound to `count-words-region', not `count-lines-region'.
2901 The `count-words-region' command, when called interactively, reports
2902 the number of lines, words, and characters in the region. It is a
2903 superset of the old `count-lines-region', which is now an obsolete
2906 ** The command `just-one-space' (M-SPC), if given a negative argument,
2907 also deletes newlines around point.
2911 *** New option `delete-active-region'.
2912 If non-nil, [delete] and DEL delete the region if it is active and no
2913 prefix argument is given. If set to `kill', those commands kill
2916 *** New command `delete-forward-char', bound to [delete].
2917 This is meant for interactive use, and obeys `delete-active-region'.
2918 The command `delete-char' does not obey `delete-active-region'.
2920 *** `delete-backward-char' is now a Lisp function.
2921 Apart from obeying `delete-active-region', its behavior is unchanged.
2922 However, the byte compiler now warns if it is called from Lisp; Lisp
2923 callers should use delete-char with a negative argument instead.
2925 *** The option `mouse-region-delete-keys' has been deleted.
2927 ** Selection changes.
2929 The default handling of clipboard and primary selections has been
2930 changed to conform with modern X applications. In short, most
2931 commands for killing and yanking text now use the clipboard, while
2932 mouse commands use the primary selection.
2934 In the following, we provide a list of these changes, followed by a
2935 list of steps to get the old behavior back if you prefer that.
2937 *** `select-active-regions' now defaults to t.
2938 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2939 the kill ring. The selected text is put in the primary selection, if
2940 the system possesses a separate primary selection facility (e.g. X).
2942 **** `select-active-regions' also accepts a new value, `only'.
2943 This means to only set the primary selection for temporarily active
2944 regions (usually made by mouse-dragging or shift-selection);
2945 "ordinary" active regions, such as those made with C-SPC followed by
2946 point motion, do not alter the primary selection.
2948 **** `mouse-drag-copy-region' now defaults to nil.
2950 *** mouse-2 is now bound to `mouse-yank-primary'.
2951 This pastes from the primary selection, ignoring the kill-ring.
2952 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2954 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2956 *** `x-select-enable-primary' now defaults to nil.
2957 Thus, commands that kill text or copy it to the kill-ring (such as
2958 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2960 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2961 exactly equivalent to M-w, C-w, and C-y respectively.
2963 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2964 non-nil by default, as Windows does not support the primary selection
2965 between applications.
2967 *** To return to the previous behavior, do the following:
2969 **** Change `select-active-regions' to nil.
2970 **** Change `mouse-drag-copy-region' to t.
2971 **** Change `x-select-enable-primary' to t (on X only).
2972 **** Change `x-select-enable-clipboard' to nil.
2973 **** Bind `mouse-yank-at-click' to mouse-2.
2975 *** Support for X cut buffers has been removed.
2977 *** X clipboard managers are now supported.
2978 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2980 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2981 in the current rectangle. With a prefix argument, this prompts for a
2982 number to count from and for a format string.
2984 ** `redisplay-dont-pause' now defaults to t.
2985 This makes Emacs feel more responsive to editing commands that arrive
2986 at high rate, e.g. if you lean on some key, because stopping redisplay
2987 in the middle (when this variable is nil) forces more expensive
2988 updates later on, and Emacs appears to be unable to keep up.
2990 ** The behavior of <TAB> for active regions in Text mode has changed.
2991 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2992 when the region is active causes Emacs to indent all the lines in the
2993 region, aligning them with the line previous to the first line in the
2994 region (or with the left margin if there is no previous line).
2996 ** When `occur' is called with a prefix argument, matching strings are
2997 collected into the `*Occur*' buffer without line numbers. If there
2998 are parenthesized subexpressions in the specified regexp, `occur'
2999 reads replacement text that may contain \\& and \\N whose convention
3000 follows `replace-match'.
3003 * Changes in Specialized Modes and Packages in Emacs 24.1
3005 ** Archive Mode has basic support for browsing and updating 7z archives.
3009 *** BibTeX mode now supports biblatex.
3010 Use the variable `bibtex-dialect' to select different BibTeX dialects.
3011 `bibtex-entry-field-alist' is now an obsolete alias for
3012 `bibtex-BibTeX-entry-alist'.
3014 *** New command `bibtex-search-entries', bound to C-c C-a.
3016 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
3018 *** New variable `bibtex-search-entry-globally'.
3022 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
3024 *** The default browser used by the package is now the "xdg-open" program,
3025 on platforms that support it. This calls your desktop's preferred browser.
3029 *** Support for musical notes.
3031 *** Support for logarithmic units.
3033 *** No longer uses the tex prefix for TeX specific unit names when
3034 using TeX or LaTeX mode.
3036 *** New option to highlight selections using faces.
3038 *** `calc-histogram' has the option of using a vector to determine the bins.
3040 *** New "O" option prefix.
3042 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
3044 ** Calendar, Diary, and Appt
3046 *** Diary entries can contain non-printing "comments".
3047 See the variable `diary-comment-start'.
3049 *** Appointments can specify their individual warning times.
3050 See the variable `appt-warning-time-regexp'.
3052 *** The function specified by `appt-disp-window-function' may be passed
3053 lists of arguments if multiple appointments are due at similar times.
3054 If you are using a custom function for this, you should update it.
3056 *** New function `diary-hebrew-birthday'.
3058 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
3059 may no longer be nil, but must all be strings.
3061 *** The obsolete (since Emacs 22.1) method of enabling the appt
3062 package by adding `appt-make-list' to `diary-hook' has been removed.
3063 Use `appt-activate' instead.
3065 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
3066 appt-issue-message (use the function appt-activate)
3067 appt-visible/appt-msg-window (use the variable appt-display-format)
3069 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
3070 view-diary-entries, list-diary-entries, show-all-diary-entries
3074 *** New feature to "guess" the style in an existing buffer.
3075 The main entry point is M-x c-guess.
3077 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
3079 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
3080 Thus C-M-a will, by default, go to the beginning of the immediate function,
3083 *** "Macros with semicolons" can be registered for correct indentation.
3084 Where such a macro ends a line (no semicolon) the next statement is no longer
3085 parsed as a statement continuation.
3087 ** Comint and modes derived from it use the standard completion code.
3091 *** Compilation mode can be used without Font Lock mode.
3092 `compilation-parse-errors-function' is now obsolete.
3094 *** New variable `compilation-filter-start', which is bound while
3095 `compilation-filter-hook' runs. It records the start position of the
3096 text inserted by `compilation-filter'.
3098 *** `compilation-error-screen-columns' and `compilation-first-column'
3099 are obeyed in the editing buffer. So programming language modes can
3100 set them, whereas previously only the value in the *Compilation*
3105 *** Customize buffers now contain a search field.
3106 The search is performed using `customize-apropos'.
3107 To turn off the search field, set `custom-search-field' to nil.
3109 *** Options in customize group buffers start out hidden if not customized.
3110 Use the arrow to the left of the option name to toggle visibility.
3112 *** custom-buffer-sort-alphabetically now defaults to t.
3114 *** The color widget now has a "Choose" button, which allows you to
3115 choose a color via `list-colors-display'.
3119 *** It is now possible to access buses other than the default system
3122 *** The `dbus-register-method' and `dbus-register-property' functions
3123 optionally do not register names.
3125 *** The new function `dbus-register-service' registers a known service
3126 name on a D-Bus without also registering a property or a method.
3130 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3131 if called with a prefix argument, read a file name from the minibuffer
3132 instead of using the current buffer.
3134 *** The "dired local variables" feature of Dired-x is obsolete.
3135 The standard directory local variables feature replaces it.
3139 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3140 controlling attempts to autojoin a channel.
3142 *** New variable `erc-coding-system-precedence': If we use `undecided'
3143 as the server coding system, this variable will then be consulted.
3144 The default is to decode strings that can be decoded as utf-8 as
3145 utf-8, and do the normal `undecided' decoding for the rest.
3149 *** The default value of `eshell-directory-name' has changed
3150 to be an "eshell" directory in `user-emacs-directory'.
3151 The old "~/.eshell/" directory is still used if it exists, though.
3155 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3156 It now supports multithread non-stop debugging and simultaneous
3157 debugging of several threads.
3161 *** RET (`image-toggle-animation') toggles animation, if applicable.
3162 Animation plays once, unless the option `image-animate-loop' is non-nil.
3166 *** New command M-x info-display-manual displays a named Info manual.
3167 If that manual is already visited in some Info buffer, it displays
3168 that buffer. (This is handy if you have many manuals in many *info*
3169 buffers, and don't remember the name of the buffer visiting the manual
3170 you want to consult.) Otherwise, it loads and displays the manual.
3172 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3173 This is for compatibility with the stand-alone Info reader program,
3174 and also because `Info-edit' is a rarely used command that is disabled
3177 ** Mail mode changes (not Message mode)
3179 *** New command M-x mail-add-attachment for adding MIME attachments
3181 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3182 (Its name is misleading, since it has nothing to do with MIME
3183 attachments.) The old name is now an obsolete alias to the new name.
3185 ** MH-E has been updated to MH-E version 8.3.1.
3186 See MH-E-NEWS for details.
3188 ** Modula-2 mode provides auto-indentation.
3190 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3192 ** nXML mode no longer binds C-RET to `nxml-complete'.
3193 Completion is now performed via `completion-at-point', bound to C-M-i
3194 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3195 default), this performs tag completion.
3197 ** Org mode has been updated to version 7.8.09.
3198 See ORG-NEWS for details.
3200 ** Prolog mode has been completely revamped, with lots of additional
3201 functionality such as more intelligent indentation, electricity,
3202 support for more variants, including Mercury, and a lot more.
3206 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3207 in the Rmail incoming message.
3209 *** The variable `rmail-message-filter' no longer has any effect.
3210 This change was made in Emacs 23.1 but was not advertised at the time.
3211 Try using `rmail-show-message-hook' instead.
3215 *** M-x shell prompts for the shell path name if the default directory
3216 is a remote file name and neither the environment variable $ESHELL nor
3217 the variable `explicit-shell-file-name' is set.
3219 *** TAB is now bound to the standard `completion-at-point' command,
3220 which now implements the pcomplete rules for shell command completion.
3224 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3225 if the mail server supports them. This uses either built-in GnuTLS
3226 support, or the starttls.el library. Customize `smtpmail-stream-type'
3229 *** The variable `smtpmail-auth-credentials' has been removed.
3230 By default, the information is now stored in the file ~/.authinfo.
3231 This was the default value of smtpmail-auth-credentials. If you had
3232 customized smtpmail-auth-credentials to a list of user names and
3233 passwords, those settings are not used. During your first connection
3234 to the smtp server, Emacs will prompt for the user name and password,
3235 and offer to save them to ~/.authinfo. Or you can manually copy the
3236 credentials to ~/.authinfo. For example, if you had
3238 (setq smtpmail-auth-credentials
3239 '(("mail.example.org" 25 "jim" "s!cret")))
3241 then the equivalent line in ~/.authinfo would be
3243 machine mail.example.org port 25 login jim password s!cret
3245 See the auth-source manual for more information, e.g. on encrypting
3246 the credentials file.
3248 *** The variable `smtpmail-starttls-credentials' has been removed.
3249 If you had that set, you need to put
3251 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3253 in your ~/.authinfo file instead.
3255 *** SMTPmail defaults to using the address in the From: header as the
3256 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3257 to the address you wish to use instead.
3261 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3262 and `sql-oracle-scan-on'.
3264 *** New options controlling prompting for login parameters.
3265 Each supported product has a custom variable `sql-*-login-params',
3266 which is a list of the parameters to be prompted for before a
3267 connection is established.
3269 *** The command `sql-product-interactive' now takes a prefix argument,
3270 which causes it to prompt for an SQL product.
3272 *** Product-specific SQL interactive commands now take prefix arguments.
3273 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3274 given a prefix argument, prompt for a name for the SQL interactive
3275 buffer. This reduces the need for calling `sql-rename-buffer'.
3277 *** SQL interactive modes suppress command continuation prompts, and
3278 replace tabs with spaces. The first change impacts multiple line SQL
3279 statements entered with C-j between each line, statements yanked into
3280 the buffer and statements sent with `sql-send-*' functions. The
3281 second prevents the MySQL and Postgres interpreters from listing
3282 object name completions when sent text via `sql-send-*' functions.
3284 *** New command `sql-connect' starts a predefined SQLi session,
3285 using the login parameters from `sql-connection-alist'.
3287 *** New "Save Connection" menu item in SQLi buffers.
3288 This gathers the login params specified for the SQLi session, if it
3289 was not started by a connection, and saves them as a new connection.
3291 *** New commands for listing database objects and details:
3292 sql-list-all and sql-list-table.
3294 *** An API for manipulating SQL product definitions has been added.
3298 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3302 *** New inline access method "ksu" (kerberized su).
3304 *** The following access methods are discontinued: "ssh1_old",
3305 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3307 *** The user option `remote-file-name-inhibit-cache' controls whether
3308 remote file attributes are cached for better performance.
3310 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3311 default value to "".
3313 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3314 for remote machines which support SELinux.
3316 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3317 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3318 the degree of parallelism.
3320 ** VC and related modes
3322 *** Support for pulling on distributed version control systems.
3323 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3324 supported (currently with Bzr, Git, and Mercurial), to update the
3325 current branch and working tree. A prefix argument means to prompt
3326 the user for specifics, e.g. a pull location.
3328 *** `vc-update' is now an alias for `vc-pull'.
3330 *** Support for merging on distributed version control systems.
3331 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3332 is supported (currently with Bzr, Git, and Mercurial), to merge
3333 changes from another branch into the current one. It prompts for
3334 specifics, e.g. a merge source.
3336 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3337 shows a diff while querying the user. It defaults to t.
3339 *** Log entries in some Log View buffers can be toggled to display a
3340 longer description by typing RET (log-view-toggle-entry-display).
3341 This is currently supported for Bzr, Git, and Mercurial (to support
3342 another backend, define a `log-view-expanded-log-entry-function').
3343 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3344 use this to display the full log entry for the revision at point.
3346 *** New command `vc-ediff' allows visual comparison of two revisions
3347 of a file similar to `vc-diff', but using ediff backend.
3349 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3350 this was not advertised at the time.
3352 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3353 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3354 this was not advertised at the time.
3360 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3362 *** partial-completion-mode (complete.el) is obsolete.
3363 You can get a comparable behavior with:
3364 (setq completion-styles '(partial-completion initials))
3365 (setq completion-pcm-complete-word-inserts-delimiters t)
3367 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3369 *** pgg is obsolete (use EasyPG instead).
3371 *** sregex.el is obsolete, since rx.el is a strict superset.
3373 *** s-region.el and pc-select.el are obsolete.
3374 They are superseded by shift-select-mode, enabled by default since 23.1.
3376 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3380 *** The Landmark game is now invoked with `landmark', not `lm'.
3381 Its functions and variables have been similarly renamed.
3383 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3384 (This interfered with cua-mode.)
3386 *** f90.el has some support for Fortran 2008 syntax.
3388 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3390 *** New command `nato-region' converts text to NATO phonetic alphabet.
3393 * New Modes and Packages in Emacs 24.1
3395 ** Occur Edit mode applies edits made in *Occur* buffers to the
3396 original buffers. It is bound to "e" in Occur mode.
3398 ** New global minor mode electric-pair-mode.
3399 When enabled, typing an open parenthesis automatically inserts the
3400 matching closing one.
3402 ** New global minor mode electric-indent-mode.
3403 When enabled, typing certain characters triggers reindentation.
3404 Major modes wishing to use this can set electric-indent-chars or
3405 electric-indent-functions.
3407 ** New global minor mode electric-layout-mode.
3408 When enabled, typing certain characters automatically inserts newlines.
3409 Major modes wishing to use this can set electric-layout-rules.
3411 ** tabulated-list.el provides a generic major mode for tabulated data,
3412 from which other modes can be derived.
3414 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3416 ** secrets.el is an implementation of the Secret Service API, an
3417 interface to password managers like GNOME Keyring or KDE Wallet. The
3418 Secret Service API requires D-Bus for communication. The command
3419 `secrets-show-secrets' offers a buffer with a visualization of the
3422 ** notifications.el provides an implementation of the Desktop
3423 Notifications API. It requires D-Bus for communication.
3425 ** soap-client.el supports access to SOAP web services from Emacs.
3426 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3428 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3430 ** New emacs-lock.el package.
3431 The previous version has been moved to obsolete/old-emacs-lock.el.
3432 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3433 against exiting Emacs and killing the buffer can be set separately.
3434 The mechanism for automatically turning off protection for buffers
3435 with dead inferior processes has been generalized.
3438 * Incompatible Lisp Changes in Emacs 24.1
3440 ** Passing a nil argument to a minor mode function call now ENABLES
3441 the minor mode unconditionally. This is so that you can write e.g.
3443 (add-hook 'text-mode-hook 'foo-mode)
3445 to enable foo-mode in Text mode buffers, removing the need for
3446 `turn-on-foo-mode' style functions. This affects all mode commands
3447 defined by `define-minor-mode'. If called interactively, the mode
3448 command still toggles the minor mode.
3450 ** The return value of `backup-buffer' has changed.
3451 It is now a list of three elements, where the second element is a list
3452 describing the original file's SELinux context. If Emacs or the
3453 system lacks SELinux support, the context list is (nil nil nil nil).
3454 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3456 ** `char-direction-table' and the `char-direction' function were deleted.
3457 They were buggy and inferior to the new support of bidirectional
3458 editing introduced in Emacs 24. If you need the bidirectional
3459 properties of a character, use `get-char-code-property' with the last
3460 argument `bidi-class'.
3462 ** `copy-directory' now copies the source directory as a subdirectory
3463 of the target directory, if the latter is an existing directory. The
3464 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3465 the contents directly into a pre-existing target directory.
3467 ** For mouse click input events in the text area, the Y pixel
3468 coordinate in the POSITION list now counts from the top of the text
3469 area, excluding any header line. Previously, it counted from the top
3472 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3473 been further reduced. Now a backquote not followed by a space is
3474 always treated as a "new-style" backquote. Please remove all
3475 "old-style" backquotes from your code. If your code uses backquotes
3476 as documented in the Elisp manual, and compiles without warning, then
3477 you have nothing to do in this regard. Code not following the
3478 appropriate conventions may fail to compile.
3480 The most common cause of trouble seems to be an old-style backquote
3481 followed by a newline. Another cause of trouble is vector notation
3482 for key sequence notation: instead of [(control ,)] and [(control ')],
3483 you should write [(control ?,)] and [(control ?')], which will work in
3486 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3487 was not advertised at the time. The function `custom-initialize-delay'
3488 replaced all known uses.
3490 ** `view-buffer' now treats special mode-class in the same way that
3491 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3492 major mode is special).
3494 ** Menu and tool bar changes
3496 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3497 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3498 With these alist entries omitted, `make-frame' checks the value of the
3499 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3500 a menu-bar or tool-bar, respectively. If the alist entries are added,
3501 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3503 *** The menu bar bindings's caches are not used any more.
3504 Use (where-is-internal <def> nil t) instead.
3506 ** Regions created by mouse dragging are now normal active regions,
3507 similar to those created by shift-selection (see Selection changes
3508 above). In previous Emacs versions, these regions were delineated by
3509 `mouse-drag-overlay'; that variable has been removed.
3511 ** The fourth argument of `filter-buffer-substring' has been removed.
3512 If you want to remove text properties from the final result, simply
3513 pass the result through substring-no-properties.
3515 ** cl.el no longer provides `cl-19'.
3517 ** The following obsolete functions and aliases have been removed
3518 (the appropriate new function is given in parentheses; "not needed"
3519 means you can just remove all calls to the function in question):
3521 *** `comint-kill-output' (`comint-delete-output')
3522 *** `decompose-composite-char' (`char-to-string')
3523 *** `outline-visible' (`outline-invisible-p')
3524 *** `internal-find-face' (`facep')
3525 *** `internal-get-face' (`facep and check-face')
3526 *** `frame-update-faces' (not needed)
3527 *** `frame-update-face-colors' (`frame-set-background-mode')
3528 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3529 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3530 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3531 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3532 *** `x-make-font-unbold' (`make-face-unbold')
3533 *** `x-make-font-unitalic' (`make-face-unitalic')
3534 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3535 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3536 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3537 *** `char-bytes' (== 1)
3538 *** `isearch-return-char' (`isearch-printing-char')
3539 *** `make-local-hook' (not needed)
3540 *** `set-screen-height' (`set-frame-height')
3541 *** `set-screen-width' (`set-frame-width')
3543 ** The following obsolete variables and varaliases have been removed
3544 (the appropriate new variable is given in parentheses):
3546 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3547 *** `vc-header-alist' (`vc-BACKEND-header')
3548 *** `directory-sep-char' (== ?/)
3549 *** `font-lock-defaults-alist' (`font-lock-defaults')
3550 *** `e' (`float-e').
3552 ** The following obsolete files were removed:
3553 sc.el, x-menu.el, rnews.el, rnewspost.el
3555 ** The format of the finder-inf.el file has changed, since the Finder
3556 mechanism is now based on the package system. The variable
3557 `finder-package-info' is replaced by `package--builtins' and
3558 `finder-keywords-hash'.
3560 ** When generating autoloads, `update-directory-autoloads' no longer
3561 assumes every inspected file is in your `load-path'. It instead
3562 generates relative names according to the current `load-path'.
3565 * Lisp Changes in Emacs 24.1
3567 ** Code can now use lexical scoping by default instead of dynamic scoping.
3568 The `lexical-binding' variable enables lexical scoping for local
3569 variables. It is typically set via a file-local variable in the first
3570 line of the file, in which case it applies to all the code in that
3573 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3574 binding instead of the old dynamic binding mode.
3576 *** Lexically scoped interpreted functions are represented with a new form
3577 of function value which looks like (closure ENV ARGS &rest BODY).
3579 *** New macro `letrec' to define recursive local functions.
3581 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3582 So do `defcustom' and other forms that call `defvar' as a subroutine.
3584 *** New function `special-variable-p' to check whether a variable is
3585 declared as dynamically bound.
3587 *** The form ((lambda ...) ...) is deprecated.
3589 ** An Emacs Lisp testing tool is now included.
3590 Emacs Lisp developers can use this tool to write automated tests for
3591 their code. See the ERT info manual for details.
3593 ** Changes for bidirectional display and editing
3595 *** New function `current-bidi-paragraph-direction'.
3596 This returns the base direction of the paragraph at point.
3598 *** New function `bidi-string-mark-left-to-right'.
3599 Given a string containing characters from right-to-left scripts, this
3600 function returns another string which can be safely inserted into a
3601 buffer, such that any following text will be always displayed to the
3602 right of that string. (This works by appending an invisible Unicode
3603 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3605 This is useful when the buffer has overall left-to-right paragraph
3606 direction and you need to insert a string whose contents are not known
3607 in advance, without disrupting the layout of the line.
3611 *** Window tree functions are accessible in Elisp.
3612 Functions are provided to return the parent, siblings or child windows
3613 of any window including internal windows (windows not associated with a
3614 buffer) in the window tree.
3616 **** New function `window-valid-p' gives non-nil for live and internal
3619 **** Window manipulation can deal with internal windows.
3620 Many window handling functions like `split-window', `delete-window', or
3621 `delete-other-windows' as well as the window resizing functions can now
3622 act on any window including internal ones.
3624 *** window-total-height/-width vs window-body-height/-width.
3625 The function `window-height' has been renamed to `window-total-height'
3626 and `window-width' has been renamed to `window-body-width'. The old
3627 names are provided as aliases. Two new functions `window-total-width'
3628 and `window-body-height' are provided.
3630 *** Window parameters specific to window handling functions.
3631 For each window you can specify a parameter to override the default
3632 behavior of a number of functions like `split-window', `delete-window'
3633 and `delete-other-windows'. The variable `ignore-window-parameters'
3634 allows to ignore processing such parameters.
3636 *** New semantics of third argument of `split-window'.
3637 The third argument of `split-window' has been renamed to SIDE and can be
3638 set to any of the values 'below, 'right, 'above, or 'left to make the
3639 new window appear on the corresponding side of the window that shall be
3640 split. Any other value of SIDE will cause `split-window' to split the
3641 window into two side-by-side windows as before.
3643 *** Window resizing functions.
3644 A new standard function for resizing windows called `window-resize' has
3645 been introduced. This and all other functions for resizing windows no
3646 longer delete any windows when they become too small.
3648 *** Deleting the selected window now selects the most recently selected
3649 live window on that frame instead.
3651 *** `adjust-window-trailing-edge' adjustments.
3652 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3653 is able to resize other windows if a window adjacent to the trailing
3654 edge cannot be shrunk any more. This makes its behavior more similar to
3655 that of Emacs 21 without compromising, however, its inability to delete
3656 windows which was introduced in Emacs 22.
3658 *** Window-local buffer lists.
3659 Windows now have local buffer lists. This means that removing a buffer
3660 from display in a window will preferably show the buffer previously
3661 shown in that window with its previous window-start and window-point
3662 positions. This also means that the same buffer may be automatically
3663 shown twice even if it already appears in another window.
3665 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3666 which if non-nil requires the buffer to be displayed in the currently
3667 selected window, signaling an error otherwise. If nil, another window
3668 can be used, e.g. if the selected one is strongly dedicated.
3670 *** `split-window-vertically' and `split-window-horizontally' renamed
3671 to `split-window-below' and `split-window-right' respectively.
3672 The old names are kept as aliases.
3676 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3677 named ACTION, and takes a display action of the same form as
3678 `display-buffer-base-action' (see Changes, above). A non-nil,
3679 non-list value is treated specially, as the old meaning.
3681 **** New variable `display-buffer-overriding-action'.
3683 **** The procedure of `display-buffer' etc. to choose a window is
3684 determined by combining `display-buffer-overriding-action',
3685 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3686 and `display-buffer-fallback-action'. The second and fourth of these
3687 are user-customizable variables.
3689 See the docstring of `display-buffer' for details.
3691 *** New functions `window-state-get' and `window-state-put'.
3692 These functions allow to save and restore the state of an arbitrary
3693 frame or window as an Elisp object.
3697 *** New variable `completion-extra-properties' used to specify extra
3698 properties of the current completion:
3699 - :annotate-function, same as the old completion-annotate-function.
3700 - :exit-function, function to call after completion took place.
3702 *** Functions on `completion-at-point-functions' can return any of the
3703 properties valid for `completion-extra-properties'.
3705 *** `completion-annotate-function' is obsolete.
3707 *** New `metadata' method for completion tables. The metadata thus returned
3708 can specify various details of the data returned by `all-completions':
3709 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3710 used to select a style in completion-category-overrides.
3711 - `annotation-function' to add annotations in *Completions*.
3712 - `display-sort-function' to specify how to sort entries in *Completions*.
3713 - `cycle-sort-function' to specify how to sort entries when cycling.
3715 *** `minibuffer-local-filename-must-match-map' is not used any more.
3716 Instead, the bindings in `minibuffer-local-filename-completion-map'
3717 are combined with `minibuffer-local-must-match-map'.
3719 *** New variable `completing-read-function' allows overriding the
3720 behavior of `completing-read'.
3722 ** `glyphless-char-display' can now distinguish between graphical and
3723 text terminal display, via a char-table entry that is a cons cell.
3725 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3726 Instead, the offending function is removed.
3730 *** New function `run-hook-wrapped' for running an abnormal hook by
3731 passing the hook functions as arguments to a "wrapping" function.
3732 Like `run-hook-with-args-until-success', it stops at the first
3733 non-nil return value.
3735 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3736 set of "wrapping" filters, similar to around advice.
3737 (A version of this macro was actually added in Emacs 23.2 but was not
3738 advertised at the time.)
3742 *** New macro `condition-case-unless-debug' (this was actually added in
3743 Emacs 23.1 as condition-case-no-debug, but not advertised)
3745 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3747 *** Variable `stack-trace-on-error' removed.
3749 *** The debugger can now "continue" from an error, which means it will
3750 jump to the error handler as if the debugger had not been invoked
3751 instead of jumping all the way to the top-level.
3753 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3754 This can be useful when `inhibit-quit' is set.
3756 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3757 named Emacs server instances.
3759 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3760 to redirect STDOUT to a file.
3762 ** The function `format-time-string' now supports the %N directive,
3763 for higher-resolution time stamps.
3765 ** New input reading functions
3767 *** New function `read-char-choice' reads a restricted set of
3768 characters, discarding any inputs not inside the set.
3770 *** The command `read-color' now requires a match for a color name
3771 or RGB triplet, instead of signaling an error if the user provides
3774 **** `facemenu-read-color' is now an alias for `read-color'.
3776 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3777 The variable is now used to load all kind of supported dynamic libraries,
3778 not just image libraries. The previous name is still available as an
3781 ** Syntax parsing changes
3783 *** New variable `syntax-propertize-function'.
3784 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3785 This allows syntax-table properties to be set independently from font-lock:
3786 just call syntax-propertize to make sure the text is propertized.
3787 Together with this new variable come a new hook
3788 syntax-propertize-extend-region-functions, as well as two helper functions:
3789 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3790 as-is; and syntax-propertize-rules which provides a new way to specify
3793 *** Syntax tables support a new "comment style c" additionally to style b.
3795 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3797 ** frame-local variables cannot be let-bound any more.
3799 ** Major and minor mode changes
3801 *** `set-auto-mode' now respects mode: local variables at the end of files,
3802 as well as those in the -*- line.
3804 *** `prog-mode' is a new major mode from which programming modes
3807 **** `prog-mode-hook' can be used to enable features for programming
3808 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3809 on-the-fly spell checking for comments and strings.
3811 *** New hook `change-major-mode-after-body-hook', run by
3812 `run-mode-hooks' just before any other mode hooks.
3814 *** Enabled globalized minor modes can be disabled in specific major modes.
3815 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3816 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3818 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3820 ** File-handling changes
3822 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3823 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3824 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3825 argument is supplied (see Trash changes, above).
3827 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3829 ** Tool-bars can display separators.
3830 Tool-bar separators are handled like menu separators in menu-bar maps,
3831 i.e. via menu entries of the form `(menu-item "--")'.
3835 *** Animated images support (currently animated gifs only).
3837 **** `image-animated-p' returns non-nil if an image can be animated.
3839 **** `image-animate' animates a supplied image spec.
3841 **** `image-animate-timer' returns the timer object for an image that
3844 *** `image-extension-data' has been renamed to `image-metadata'.
3845 The old name is an obsolete alias to the new one.
3847 *** Image mode can view any image type that ImageMagick supports.
3848 This requires Emacs to be built with ImageMagick support.
3850 **** New function `imagemagick-types', defined if ImageMagick support
3851 is enabled, returns a list of image file extensions that your
3852 ImageMagick installation supports.
3854 **** New function `imagemagick-register-types' enables ImageMagick
3855 image types in Image mode and in `create-image' and other helper
3858 **** New option `imagemagick-types-inhibit' excludes certain
3859 ImageMagick image types from `imagemagick-register-types'.
3861 **** With ImageMagick support, there are extra Image mode commands to
3862 resize and rotate images: `image-transform-fit-to-height',
3863 `image-transform-fit-to-width', `image-transform-set-rotation', and
3864 `image-transform-set-scale'.
3866 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3867 passes it to the mail user agent function. This argument specifies an
3868 action for returning to the caller after finishing with the mail. For
3869 example, this is used by Rmail to optionally delete a mail window.
3871 ** XML and HTML parsing
3872 If Emacs is compiled with libxml2 support, there are two new
3873 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3874 and `libxml-parse-xml-region' (which parses XML). Both return an
3875 Emacs Lisp parse tree.
3877 ** Networking and encryption changes
3879 *** `open-network-stream' can now be used to open an encrypted stream.
3880 It now accepts an optional `:type' parameter for initiating a TLS
3881 connection, directly or via STARTTLS. To do STARTTLS, additional
3882 parameters (`:end-of-command', `:success', `:capabilities-command')
3883 must also be supplied.
3885 *** New library gnutls.el.
3886 The new function `gnutls-available-p' returns non-nil if Emacs is
3887 built with GnuTLS support. The main entry points are
3888 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3889 these functions through `open-network-stream', because that can
3890 upgrade connections through STARTTLS opportunistically or use plain
3891 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3894 *** New primitive `secure-hash' that supports many secure hash algorithms:
3895 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3896 sha1.el has been removed. The `sha1' feature is provided by default.
3900 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3902 ** Progress reporters can now "spin".
3903 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3904 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3905 time you call `progress-reporter-update' on that progress reporter,
3906 with a nil or omitted VALUE argument, the reporter message is
3907 displayed with a "spinning bar".
3909 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3910 being reverted, even if the buffer has a local `revert-buffer-function'.
3912 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3913 If delayed-warnings-list is non-nil, the command loop calls
3914 `delayed-warnings-hook' after `post-command-hook'. At present, this
3915 is only used by Emacs on some platforms to display warnings during
3916 startup, which might otherwise not be noticed. This uses the
3917 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3919 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3921 ** New function `make-composed-keymap' that constructs a new keymap
3922 from multiple input maps. You can use this to make a keymap that
3923 inherits from multiple maps, eg:
3924 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3926 ** New function `string-prefix-p'.
3927 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3929 ** New reader macro ## that stands for the empty symbol.
3930 This means that the empty symbol can now be read back. Also, #: by itself
3931 (when not immediately followed by a possible symbol character) stands for
3932 an empty uninterned symbol.
3934 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3936 ** The following functions and variables are obsolete:
3938 *** `tooltip-use-echo-area' is obsolete.
3939 Rather than setting this to t, disable Tooltip mode instead.
3941 *** buffer-substring-filters is obsolete.
3942 Use `filter-buffer-substring-functions' instead.
3944 *** `byte-compile-disable-print-circle' is obsolete.
3946 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3947 Use `post-command-hook' instead.
3949 *** `font-lock-maximum-size' is obsolete.
3952 * Changes in Emacs 24.1 on Non-Free Operating Systems
3954 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3955 and also when HOME is set to C:\ by default.
3957 ** New configure.bat options
3959 *** --enable-checking builds Emacs with extra runtime checks.
3961 *** --distfiles specifies files to be included in binary distribution.
3963 *** --without-gnutls disables automatic GnuTLS detection.
3965 *** --lib for general library linkage, works with the USER_LIBS build variable.
3967 ** New make target `dist' to create binary distribution for MS Windows.
3969 ** The Lisp function `w32-default-color-map' is now obsolete.
3970 (It is only used internally in the Emacs C code.)
3972 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3973 reappear on mouse-over. (Requires OS X 10.6 or later.)
3975 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3976 other platforms, rather than inserting its contents into the buffer.
3979 ----------------------------------------------------------------------
3980 This file is part of GNU Emacs.
3982 GNU Emacs is free software: you can redistribute it and/or modify
3983 it under the terms of the GNU General Public License as published by
3984 the Free Software Foundation, either version 3 of the License, or
3985 (at your option) any later version.
3987 GNU Emacs is distributed in the hope that it will be useful,
3988 but WITHOUT ANY WARRANTY; without even the implied warranty of
3989 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3990 GNU General Public License for more details.
3992 You should have received a copy of the GNU General Public License
3993 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3998 paragraph-separate: "[
\f]*$"